Import upstream version 0.9.13upstream/0.9.13

141 files changed, 63954 insertions, 0 deletions

diff --git a/src/Makefile.am b/src/Makefile.am
new file mode 100644
index 000000000..1573563f0
--- /dev/null
+++ b/src/Makefile.am
@@ -0,0 +1,13 @@
+INCLUDES = $(all_includes) -I$(top_srcdir)/include -I$(top_builddir)
+AM_CFLAGS=-Wall $(LIBOSMOCORE_CFLAGS) $(LIBOSMOVTY_CFLAGS) $(COVERAGE_CFLAGS)
+AM_LDFLAGS = $(LIBOSMOCORE_LIBS) $(COVERAGE_LDFLAGS)
+
+SUBDIRS = libcommon libabis libmgcp libbsc libmsc libtrau osmo-nitb osmo-bsc_mgcp utils ipaccess libgb gprs
+
+# Conditional modules
+if BUILD_NAT
+SUBDIRS += osmo-bsc_nat
+endif
+if BUILD_BSC
+SUBDIRS += osmo-bsc
+endif
diff --git a/src/Makefile.in b/src/Makefile.in
new file mode 100644
index 000000000..b1c2f0884
--- /dev/null
+++ b/src/Makefile.in
@@ -0,0 +1,548 @@
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+# This Makefile.in is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# This program is distributed in the hope that it will be useful,
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+@BUILD_BSC_TRUE@am__append_2 = osmo-bsc
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+	all all-am check check-am clean clean-generic ctags \
+	ctags-recursive distclean distclean-generic distclean-tags \
+	distdir dvi dvi-am html html-am info info-am install \
+	install-am install-data install-data-am install-dvi \
+	install-dvi-am install-exec install-exec-am install-html \
+	install-html-am install-info install-info-am install-man \
+	install-pdf install-pdf-am install-ps install-ps-am \
+	install-strip installcheck installcheck-am installdirs \
+	installdirs-am maintainer-clean maintainer-clean-generic \
+	mostlyclean mostlyclean-generic pdf pdf-am ps ps-am tags \
+	tags-recursive uninstall uninstall-am
+
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/src/gprs/Makefile.am b/src/gprs/Makefile.am
new file mode 100644
index 000000000..16c2200e5
--- /dev/null
+++ b/src/gprs/Makefile.am
@@ -0,0 +1,22 @@
+INCLUDES = $(all_includes) -I$(top_srcdir)/include -I$(top_builddir)
+AM_CFLAGS=-Wall -fno-strict-aliasing $(LIBOSMOCORE_CFLAGS) $(LIBOSMOVTY_CFLAGS) $(COVERAGE_CFLAGS)
+AM_LDFLAGS = $(LIBOSMOCORE_LIBS) $(LIBOSMOVTY_LIBS) $(COVERAGE_LDFLAGS)
+
+noinst_HEADERS = gprs_sndcp.h
+
+if HAVE_LIBGTP
+bin_PROGRAMS = osmo-gbproxy osmo-sgsn
+else
+bin_PROGRAMS = osmo-gbproxy
+endif
+
+osmo_gbproxy_SOURCES = gb_proxy.c gb_proxy_main.c gb_proxy_vty.c
+osmo_gbproxy_LDADD = 	$(top_builddir)/src/libgb/libgb.a \
+			$(top_builddir)/src/libcommon/libcommon.a
+
+osmo_sgsn_SOURCES =	gprs_gmm.c gprs_sgsn.c gprs_sndcp.c gprs_sndcp_vty.c \
+			sgsn_main.c sgsn_vty.c sgsn_libgtp.c \
+			gprs_llc.c gprs_llc_vty.c crc24.c
+osmo_sgsn_LDADD = 	$(top_builddir)/src/libgb/libgb.a \
+			$(top_builddir)/src/libcommon/libcommon.a \
+			-lgtp
diff --git a/src/gprs/Makefile.in b/src/gprs/Makefile.in
new file mode 100644
index 000000000..99ea7391a
--- /dev/null
+++ b/src/gprs/Makefile.in
@@ -0,0 +1,522 @@
+# Makefile.in generated by automake 1.11.1 from Makefile.am.
+# @configure_input@
+
+# Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
+# 2003, 2004, 2005, 2006, 2007, 2008, 2009  Free Software Foundation,
+# Inc.
+# This Makefile.in is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
+# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
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+
+@SET_MAKE@
+
+
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+NORMAL_UNINSTALL = :
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+POST_UNINSTALL = :
+@HAVE_LIBGTP_FALSE@bin_PROGRAMS = osmo-gbproxy$(EXEEXT)
+@HAVE_LIBGTP_TRUE@bin_PROGRAMS = osmo-gbproxy$(EXEEXT) \
+@HAVE_LIBGTP_TRUE@	osmo-sgsn$(EXEEXT)
+subdir = src/gprs
+DIST_COMMON = $(noinst_HEADERS) $(srcdir)/Makefile.am \
+	$(srcdir)/Makefile.in
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+CONFIG_CLEAN_VPATH_FILES =
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+	gb_proxy_vty.$(OBJEXT)
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+osmo_gbproxy_DEPENDENCIES = $(top_builddir)/src/libgb/libgb.a \
+	$(top_builddir)/src/libcommon/libcommon.a
+am_osmo_sgsn_OBJECTS = gprs_gmm.$(OBJEXT) gprs_sgsn.$(OBJEXT) \
+	gprs_sndcp.$(OBJEXT) gprs_sndcp_vty.$(OBJEXT) \
+	sgsn_main.$(OBJEXT) sgsn_vty.$(OBJEXT) sgsn_libgtp.$(OBJEXT) \
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+osmo_gbproxy_LDADD = $(top_builddir)/src/libgb/libgb.a \
+			$(top_builddir)/src/libcommon/libcommon.a
+
+osmo_sgsn_SOURCES = gprs_gmm.c gprs_sgsn.c gprs_sndcp.c gprs_sndcp_vty.c \
+			sgsn_main.c sgsn_vty.c sgsn_libgtp.c \
+			gprs_llc.c gprs_llc_vty.c crc24.c
+
+osmo_sgsn_LDADD = $(top_builddir)/src/libgb/libgb.a \
+			$(top_builddir)/src/libcommon/libcommon.a \
+			-lgtp
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+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
+	    if test -d $(srcdir)/$$file && test $$d != $(srcdir); then \
+	      cp -fpR $(srcdir)/$$file "$(distdir)$$dir" || exit 1; \
+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
+	    cp -fpR $$d/$$file "$(distdir)$$dir" || exit 1; \
+	  else \
+	    test -f "$(distdir)/$$file" \
+	    || cp -p $$d/$$file "$(distdir)/$$file" \
+	    || exit 1; \
+	  fi; \
+	done
+check-am: all-am
+check: check-am
+all-am: Makefile $(PROGRAMS) $(HEADERS)
+installdirs:
+	for dir in "$(DESTDIR)$(bindir)"; do \
+	  test -z "$$dir" || $(MKDIR_P) "$$dir"; \
+	done
+install: install-am
+install-exec: install-exec-am
+install-data: install-data-am
+uninstall: uninstall-am
+
+install-am: all-am
+	@$(MAKE) $(AM_MAKEFLAGS) install-exec-am install-data-am
+
+installcheck: installcheck-am
+install-strip:
+	$(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	  install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	  `test -z '$(STRIP)' || \
+	    echo "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'"` install
+mostlyclean-generic:
+
+clean-generic:
+
+distclean-generic:
+	-test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
+	-test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
+
+maintainer-clean-generic:
+	@echo "This command is intended for maintainers to use"
+	@echo "it deletes files that may require special tools to rebuild."
+clean: clean-am
+
+clean-am: clean-binPROGRAMS clean-generic mostlyclean-am
+
+distclean: distclean-am
+	-rm -rf ./$(DEPDIR)
+	-rm -f Makefile
+distclean-am: clean-am distclean-compile distclean-generic \
+	distclean-tags
+
+dvi: dvi-am
+
+dvi-am:
+
+html: html-am
+
+html-am:
+
+info: info-am
+
+info-am:
+
+install-data-am:
+
+install-dvi: install-dvi-am
+
+install-dvi-am:
+
+install-exec-am: install-binPROGRAMS
+
+install-html: install-html-am
+
+install-html-am:
+
+install-info: install-info-am
+
+install-info-am:
+
+install-man:
+
+install-pdf: install-pdf-am
+
+install-pdf-am:
+
+install-ps: install-ps-am
+
+install-ps-am:
+
+installcheck-am:
+
+maintainer-clean: maintainer-clean-am
+	-rm -rf ./$(DEPDIR)
+	-rm -f Makefile
+maintainer-clean-am: distclean-am maintainer-clean-generic
+
+mostlyclean: mostlyclean-am
+
+mostlyclean-am: mostlyclean-compile mostlyclean-generic
+
+pdf: pdf-am
+
+pdf-am:
+
+ps: ps-am
+
+ps-am:
+
+uninstall-am: uninstall-binPROGRAMS
+
+.MAKE: install-am install-strip
+
+.PHONY: CTAGS GTAGS all all-am check check-am clean clean-binPROGRAMS \
+	clean-generic ctags distclean distclean-compile \
+	distclean-generic distclean-tags distdir dvi dvi-am html \
+	html-am info info-am install install-am install-binPROGRAMS \
+	install-data install-data-am install-dvi install-dvi-am \
+	install-exec install-exec-am install-html install-html-am \
+	install-info install-info-am install-man install-pdf \
+	install-pdf-am install-ps install-ps-am install-strip \
+	installcheck installcheck-am installdirs maintainer-clean \
+	maintainer-clean-generic mostlyclean mostlyclean-compile \
+	mostlyclean-generic pdf pdf-am ps ps-am tags uninstall \
+	uninstall-am uninstall-binPROGRAMS
+
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/src/gprs/crc24.c b/src/gprs/crc24.c
new file mode 100644
index 000000000..4d65e6ee1
--- /dev/null
+++ b/src/gprs/crc24.c
@@ -0,0 +1,68 @@
+/* GPRS LLC CRC-24 Implementation */
+
+/* (C) 2008-2009 by Harald Welte <laforge@gnumonks.org>
+ *
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <sys/types.h>
+#include <openbsc/crc24.h>
+
+/* CRC24 table - FCS */
+static const u_int32_t tbl_crc24[256] = {
+	0x00000000, 0x00d6a776, 0x00f64557, 0x0020e221, 0x00b78115, 0x00612663, 0x0041c442, 0x00976334,
+	0x00340991, 0x00e2aee7, 0x00c24cc6, 0x0014ebb0, 0x00838884, 0x00552ff2, 0x0075cdd3, 0x00a36aa5,
+	0x00681322, 0x00beb454, 0x009e5675, 0x0048f103, 0x00df9237, 0x00093541, 0x0029d760, 0x00ff7016,
+	0x005c1ab3, 0x008abdc5, 0x00aa5fe4, 0x007cf892, 0x00eb9ba6, 0x003d3cd0, 0x001ddef1, 0x00cb7987,
+	0x00d02644, 0x00068132, 0x00266313, 0x00f0c465, 0x0067a751, 0x00b10027, 0x0091e206, 0x00474570,
+	0x00e42fd5, 0x003288a3, 0x00126a82, 0x00c4cdf4, 0x0053aec0, 0x008509b6, 0x00a5eb97, 0x00734ce1,
+	0x00b83566, 0x006e9210, 0x004e7031, 0x0098d747, 0x000fb473, 0x00d91305, 0x00f9f124, 0x002f5652,
+	0x008c3cf7, 0x005a9b81, 0x007a79a0, 0x00acded6, 0x003bbde2, 0x00ed1a94, 0x00cdf8b5, 0x001b5fc3,
+	0x00fb4733, 0x002de045, 0x000d0264, 0x00dba512, 0x004cc626, 0x009a6150, 0x00ba8371, 0x006c2407,
+	0x00cf4ea2, 0x0019e9d4, 0x00390bf5, 0x00efac83, 0x0078cfb7, 0x00ae68c1, 0x008e8ae0, 0x00582d96,
+	0x00935411, 0x0045f367, 0x00651146, 0x00b3b630, 0x0024d504, 0x00f27272, 0x00d29053, 0x00043725,
+	0x00a75d80, 0x0071faf6, 0x005118d7, 0x0087bfa1, 0x0010dc95, 0x00c67be3, 0x00e699c2, 0x00303eb4,
+	0x002b6177, 0x00fdc601, 0x00dd2420, 0x000b8356, 0x009ce062, 0x004a4714, 0x006aa535, 0x00bc0243,
+	0x001f68e6, 0x00c9cf90, 0x00e92db1, 0x003f8ac7, 0x00a8e9f3, 0x007e4e85, 0x005eaca4, 0x00880bd2,
+	0x00437255, 0x0095d523, 0x00b53702, 0x00639074, 0x00f4f340, 0x00225436, 0x0002b617, 0x00d41161,
+	0x00777bc4, 0x00a1dcb2, 0x00813e93, 0x005799e5, 0x00c0fad1, 0x00165da7, 0x0036bf86, 0x00e018f0,
+	0x00ad85dd, 0x007b22ab, 0x005bc08a, 0x008d67fc, 0x001a04c8, 0x00cca3be, 0x00ec419f, 0x003ae6e9,
+	0x00998c4c, 0x004f2b3a, 0x006fc91b, 0x00b96e6d, 0x002e0d59, 0x00f8aa2f, 0x00d8480e, 0x000eef78,
+	0x00c596ff, 0x00133189, 0x0033d3a8, 0x00e574de, 0x007217ea, 0x00a4b09c, 0x008452bd, 0x0052f5cb,
+	0x00f19f6e, 0x00273818, 0x0007da39, 0x00d17d4f, 0x00461e7b, 0x0090b90d, 0x00b05b2c, 0x0066fc5a,
+	0x007da399, 0x00ab04ef, 0x008be6ce, 0x005d41b8, 0x00ca228c, 0x001c85fa, 0x003c67db, 0x00eac0ad,
+	0x0049aa08, 0x009f0d7e, 0x00bfef5f, 0x00694829, 0x00fe2b1d, 0x00288c6b, 0x00086e4a, 0x00dec93c,
+	0x0015b0bb, 0x00c317cd, 0x00e3f5ec, 0x0035529a, 0x00a231ae, 0x007496d8, 0x005474f9, 0x0082d38f,
+	0x0021b92a, 0x00f71e5c, 0x00d7fc7d, 0x00015b0b, 0x0096383f, 0x00409f49, 0x00607d68, 0x00b6da1e,
+	0x0056c2ee, 0x00806598, 0x00a087b9, 0x007620cf, 0x00e143fb, 0x0037e48d, 0x001706ac, 0x00c1a1da,
+	0x0062cb7f, 0x00b46c09, 0x00948e28, 0x0042295e, 0x00d54a6a, 0x0003ed1c, 0x00230f3d, 0x00f5a84b,
+	0x003ed1cc, 0x00e876ba, 0x00c8949b, 0x001e33ed, 0x008950d9, 0x005ff7af, 0x007f158e, 0x00a9b2f8,
+	0x000ad85d, 0x00dc7f2b, 0x00fc9d0a, 0x002a3a7c, 0x00bd5948, 0x006bfe3e, 0x004b1c1f, 0x009dbb69,
+	0x0086e4aa, 0x005043dc, 0x0070a1fd, 0x00a6068b, 0x003165bf, 0x00e7c2c9, 0x00c720e8, 0x0011879e,
+	0x00b2ed3b, 0x00644a4d, 0x0044a86c, 0x00920f1a, 0x00056c2e, 0x00d3cb58, 0x00f32979, 0x00258e0f,
+	0x00eef788, 0x003850fe, 0x0018b2df, 0x00ce15a9, 0x0059769d, 0x008fd1eb, 0x00af33ca, 0x007994bc,
+	0x00dafe19, 0x000c596f, 0x002cbb4e, 0x00fa1c38, 0x006d7f0c, 0x00bbd87a, 0x009b3a5b, 0x004d9d2d
+};
+
+#define INIT_CRC24	0xffffff
+
+u_int32_t crc24_calc(u_int32_t fcs, u_int8_t *cp, unsigned int len)
+{
+	while (len--)
+		fcs = (fcs >> 8) ^ tbl_crc24[(fcs ^ *cp++) & 0xff];
+	return fcs;
+}
diff --git a/src/gprs/gb_proxy.c b/src/gprs/gb_proxy.c
new file mode 100644
index 000000000..8df93a9ce
--- /dev/null
+++ b/src/gprs/gb_proxy.c
@@ -0,0 +1,684 @@
+/* NS-over-IP proxy */
+
+/* (C) 2010 by Harald Welte <laforge@gnumonks.org>
+ * (C) 2010 by On-Waves
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <getopt.h>
+#include <errno.h>
+#include <sys/fcntl.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <arpa/inet.h>
+
+#include <osmocore/talloc.h>
+#include <osmocore/select.h>
+
+#include <openbsc/signal.h>
+#include <openbsc/debug.h>
+#include <openbsc/gprs_ns.h>
+#include <openbsc/gprs_bssgp.h>
+#include <openbsc/gb_proxy.h>
+
+struct gbprox_peer {
+	struct llist_head list;
+
+	/* NS-VC over which we send/receive data to this BVC */
+	struct gprs_nsvc *nsvc;
+
+	/* BVCI used for Point-to-Point to this peer */
+	uint16_t bvci;
+	int blocked;
+
+	/* Routeing Area that this peer is part of (raw 04.08 encoding) */
+	uint8_t ra[6];
+};
+
+/* Linked list of all Gb peers (except SGSN) */
+static LLIST_HEAD(gbprox_bts_peers);
+
+/* Find the gbprox_peer by its BVCI */
+static struct gbprox_peer *peer_by_bvci(uint16_t bvci)
+{
+	struct gbprox_peer *peer;
+	llist_for_each_entry(peer, &gbprox_bts_peers, list) {
+		if (peer->bvci == bvci)
+			return peer;
+	}
+	return NULL;
+}
+
+static struct gbprox_peer *peer_by_nsvc(struct gprs_nsvc *nsvc)
+{
+	struct gbprox_peer *peer;
+	llist_for_each_entry(peer, &gbprox_bts_peers, list) {
+		if (peer->nsvc == nsvc)
+			return peer;
+	}
+	return NULL;
+}
+
+/* look-up a peer by its Routeing Area Code (RAC) */
+static struct gbprox_peer *peer_by_rac(const uint8_t *ra)
+{
+	struct gbprox_peer *peer;
+	llist_for_each_entry(peer, &gbprox_bts_peers, list) {
+		if (!memcmp(peer->ra, ra, 6))
+			return peer;
+	}
+	return NULL;
+}
+
+/* look-up a peer by its Location Area Code (LAC) */
+static struct gbprox_peer *peer_by_lac(const uint8_t *la)
+{
+	struct gbprox_peer *peer;
+	llist_for_each_entry(peer, &gbprox_bts_peers, list) {
+		if (!memcmp(peer->ra, la, 5))
+			return peer;
+	}
+	return NULL;
+}
+
+static struct gbprox_peer *peer_alloc(uint16_t bvci)
+{
+	struct gbprox_peer *peer;
+
+	peer = talloc_zero(tall_bsc_ctx, struct gbprox_peer);
+	if (!peer)
+		return NULL;
+
+	peer->bvci = bvci;
+	llist_add(&peer->list, &gbprox_bts_peers);
+
+	return peer;
+}
+
+static void peer_free(struct gbprox_peer *peer)
+{
+	llist_del(&peer->list);
+	talloc_free(peer);
+}
+
+/* FIXME: this needs to go to libosmocore/msgb.c */
+static struct msgb *msgb_copy(const struct msgb *msg, const char *name)
+{
+	struct openbsc_msgb_cb *old_cb, *new_cb;
+	struct msgb *new_msg;
+
+	new_msg = msgb_alloc(msg->data_len, name);
+	if (!new_msg)
+		return NULL;
+
+	/* copy data */
+	memcpy(new_msg->_data, msg->_data, new_msg->data_len);
+
+	/* copy header */
+	new_msg->len = msg->len;
+	new_msg->data += msg->data - msg->_data;
+	new_msg->head += msg->head - msg->_data;
+	new_msg->tail += msg->tail - msg->_data;
+
+	new_msg->l1h = new_msg->_data + (msg->l1h - msg->_data);
+	new_msg->l2h = new_msg->_data + (msg->l2h - msg->_data);
+	new_msg->l3h = new_msg->_data + (msg->l3h - msg->_data);
+	new_msg->l4h = new_msg->_data + (msg->l4h - msg->_data);
+
+	/* copy GB specific data */
+	old_cb = OBSC_MSGB_CB(msg);
+	new_cb = OBSC_MSGB_CB(new_msg);
+
+	new_cb->bssgph = new_msg->_data + (old_cb->bssgph - msg->_data);
+	new_cb->llch = new_msg->_data + (old_cb->llch - msg->_data);
+
+	/* bssgp_cell_id is a pointer into the old msgb, so we need to make
+	 * it a pointer into the new msgb */
+	new_cb->bssgp_cell_id = new_msg->_data + (old_cb->bssgp_cell_id - msg->_data);
+	new_cb->nsei = old_cb->nsei;
+	new_cb->bvci = old_cb->bvci;
+	new_cb->tlli = old_cb->tlli;
+
+	return new_msg;
+}
+
+/* strip off the NS header */
+static void strip_ns_hdr(struct msgb *msg)
+{
+	int strip_len = msgb_bssgph(msg) - msg->data;
+	msgb_pull(msg, strip_len);
+}
+
+/* feed a message down the NS-VC associated with the specified peer */
+static int gbprox_relay2sgsn(struct msgb *old_msg, uint16_t ns_bvci)
+{
+	/* create a copy of the message so the old one can
+	 * be free()d safely when we return from gbprox_rcvmsg() */
+	struct msgb *msg = msgb_copy(old_msg, "msgb_relay2sgsn");
+
+	DEBUGP(DGPRS, "NSEI=%u proxying BTS->SGSN (NS_BVCI=%u, NSEI=%u)\n",
+		msgb_nsei(msg), ns_bvci, gbcfg.nsip_sgsn_nsei);
+
+	msgb_bvci(msg) = ns_bvci;
+	msgb_nsei(msg) = gbcfg.nsip_sgsn_nsei;
+
+	strip_ns_hdr(msg);
+
+	return gprs_ns_sendmsg(bssgp_nsi, msg);
+}
+
+/* feed a message down the NS-VC associated with the specified peer */
+static int gbprox_relay2peer(struct msgb *old_msg, struct gbprox_peer *peer,
+			  uint16_t ns_bvci)
+{
+	/* create a copy of the message so the old one can
+	 * be free()d safely when we return from gbprox_rcvmsg() */
+	struct msgb *msg = msgb_copy(old_msg, "msgb_relay2peer");
+
+	DEBUGP(DGPRS, "NSEI=%u proxying SGSN->BSS (NS_BVCI=%u, NSEI=%u)\n",
+		msgb_nsei(msg), ns_bvci, peer->nsvc->nsei);
+
+	msgb_bvci(msg) = ns_bvci;
+	msgb_nsei(msg) = peer->nsvc->nsei;
+
+	/* Strip the old NS header, it will be replaced with a new one */
+	strip_ns_hdr(msg);
+
+	return gprs_ns_sendmsg(bssgp_nsi, msg);
+}
+
+static int block_unblock_peer(uint16_t ptp_bvci, uint8_t pdu_type)
+{
+	struct gbprox_peer *peer;
+
+	peer = peer_by_bvci(ptp_bvci);
+	if (!peer) {
+		LOGP(DGPRS, LOGL_ERROR, "BVCI=%u: Cannot find BSS\n",
+			ptp_bvci);
+		return -ENOENT;
+	}
+
+	switch (pdu_type) {
+	case BSSGP_PDUT_BVC_BLOCK_ACK:
+		peer->blocked = 1;
+		break;
+	case BSSGP_PDUT_BVC_UNBLOCK_ACK:
+		peer->blocked = 0;
+		break;
+	default:
+		break;
+	}
+	return 0;
+}
+
+/* Send a message to a peer identified by ptp_bvci but using ns_bvci
+ * in the NS hdr */
+static int gbprox_relay2bvci(struct msgb *msg, uint16_t ptp_bvci,
+			  uint16_t ns_bvci)
+{
+	struct gbprox_peer *peer;
+
+	peer = peer_by_bvci(ptp_bvci);
+	if (!peer) {
+		LOGP(DGPRS, LOGL_ERROR, "BVCI=%u: Cannot find BSS\n",
+			ptp_bvci);
+		return -ENOENT;
+	}
+
+	return gbprox_relay2peer(msg, peer, ns_bvci);
+}
+
+/* Receive an incoming signalling message from a BSS-side NS-VC */
+static int gbprox_rx_sig_from_bss(struct msgb *msg, struct gprs_nsvc *nsvc,
+				  uint16_t ns_bvci)
+{
+	struct bssgp_normal_hdr *bgph = (struct bssgp_normal_hdr *) msgb_bssgph(msg);
+	struct tlv_parsed tp;
+	uint8_t pdu_type = bgph->pdu_type;
+	int data_len = msgb_bssgp_len(msg) - sizeof(*bgph);
+	struct gbprox_peer *from_peer;
+	struct gprs_ra_id raid;
+
+	if (ns_bvci != 0 && ns_bvci != 1) {
+		LOGP(DGPRS, LOGL_NOTICE, "NSEI=%u BVCI=%u is not signalling\n",
+			nsvc->nsei, ns_bvci);
+		return -EINVAL;
+	}
+
+	/* we actually should never see those two for BVCI == 0, but double-check
+	 * just to make sure  */
+	if (pdu_type == BSSGP_PDUT_UL_UNITDATA ||
+	    pdu_type == BSSGP_PDUT_DL_UNITDATA) {
+		LOGP(DGPRS, LOGL_NOTICE, "NSEI=%u UNITDATA not allowed in "
+			"signalling\n", nsvc->nsei);
+		return -EINVAL;
+	}
+
+	bssgp_tlv_parse(&tp, bgph->data, data_len);
+
+	switch (pdu_type) {
+	case BSSGP_PDUT_SUSPEND:
+	case BSSGP_PDUT_RESUME:
+		/* We implement RAC snooping during SUSPEND/RESUME, since
+		 * it establishes a relationsip between BVCI/peer and the
+		 * routeing area code.  The snooped information is then
+		 * used for routing the {SUSPEND,RESUME}_[N]ACK back to
+		 * the correct BSSGP */
+		if (!TLVP_PRESENT(&tp, BSSGP_IE_ROUTEING_AREA))
+			goto err_mand_ie;
+		from_peer = peer_by_nsvc(nsvc);
+		if (!from_peer)
+			goto err_no_peer;
+		memcpy(from_peer->ra, TLVP_VAL(&tp, BSSGP_IE_ROUTEING_AREA),
+			sizeof(from_peer->ra));
+		gsm48_parse_ra(&raid, from_peer->ra);
+		LOGP(DGPRS, LOGL_INFO, "NSEI=%u BSSGP SUSPEND/RESUME "
+			"RAC snooping: RAC %u-%u-%u-%u behind BVCI=%u, "
+			"NSVCI=%u\n",nsvc->nsei, raid.mcc, raid.mnc, raid.lac,
+			raid.rac , from_peer->bvci, nsvc->nsvci);
+		/* FIXME: This only supports one BSS per RA */
+		break;
+	case BSSGP_PDUT_BVC_RESET:
+		/* If we receive a BVC reset on the signalling endpoint, we
+		 * don't want the SGSN to reset, as the signalling endpoint
+		 * is common for all point-to-point BVCs (and thus all BTS) */
+		if (TLVP_PRESENT(&tp, BSSGP_IE_BVCI)) {
+			uint16_t bvci = ntohs(*(uint16_t *)TLVP_VAL(&tp, BSSGP_IE_BVCI));
+			LOGP(DGPRS, LOGL_INFO, "NSEI=%u Rx BVC RESET (BVCI=%u)\n",
+				nsvc->nsei, bvci);
+			if (bvci == 0) {
+				/* FIXME: only do this if SGSN is alive! */
+				LOGP(DGPRS, LOGL_INFO, "NSEI=%u Tx fake "
+					"BVC RESET ACK of BVCI=0\n", nsvc->nsei);
+				return bssgp_tx_simple_bvci(BSSGP_PDUT_BVC_RESET_ACK,
+							    nsvc->nsei, 0, ns_bvci);
+			}
+			from_peer = peer_by_bvci(bvci);
+			if (!from_peer) {
+				/* if a PTP-BVC is reset, and we don't know that
+				 * PTP-BVCI yet, we should allocate a new peer */
+				LOGP(DGPRS, LOGL_INFO, "Allocationg new peer for "
+				     "BVCI=%u via NSVCI=%u/NSEI=%u\n", bvci,
+				     nsvc->nsvci, nsvc->nsei);
+				from_peer = peer_alloc(bvci);
+				from_peer->nsvc = nsvc;
+			}
+			if (TLVP_PRESENT(&tp, BSSGP_IE_CELL_ID)) {
+				struct gprs_ra_id raid;
+				/* We have a Cell Identifier present in this
+				 * PDU, this means we can extend our local
+				 * state information about this particular cell
+				 * */
+				memcpy(from_peer->ra,
+					TLVP_VAL(&tp, BSSGP_IE_CELL_ID),
+					sizeof(from_peer->ra));
+				gsm48_parse_ra(&raid, from_peer->ra);
+				LOGP(DGPRS, LOGL_INFO, "NSEI=%u/BVCI=%u "
+				     "Cell ID %u-%u-%u-%u\n", nsvc->nsei,
+				     bvci, raid.mcc, raid.mnc, raid.lac,
+				     raid.rac);
+			}
+		}
+		break;
+	}
+
+	/* Normally, we can simply pass on all signalling messages from BSS to
+	 * SGSN */
+	return gbprox_relay2sgsn(msg, ns_bvci);
+err_no_peer:
+	LOGP(DGPRS, LOGL_ERROR, "NSEI=%u(BSS) cannot find peer based on RAC\n",
+		nsvc->nsei);
+	return bssgp_tx_status(BSSGP_CAUSE_UNKNOWN_BVCI, NULL, msg);
+err_mand_ie:
+	LOGP(DGPRS, LOGL_ERROR, "NSEI=%u(BSS) missing mandatory RA IE\n",
+		nsvc->nsei);
+	return bssgp_tx_status(BSSGP_CAUSE_MISSING_MAND_IE, NULL, msg);
+}
+
+/* Receive paging request from SGSN, we need to relay to proper BSS */
+static int gbprox_rx_paging(struct msgb *msg, struct tlv_parsed *tp,
+			    struct gprs_nsvc *nsvc, uint16_t ns_bvci)
+{
+	struct gbprox_peer *peer = NULL;
+
+	LOGP(DGPRS, LOGL_INFO, "NSEI=%u(SGSN) BSSGP PAGING ",
+		nsvc->nsei);
+	if (TLVP_PRESENT(tp, BSSGP_IE_BVCI)) {
+		uint16_t bvci = ntohs(*(uint16_t *)TLVP_VAL(tp, BSSGP_IE_BVCI));
+		LOGPC(DGPRS, LOGL_INFO, "routing by BVCI to peer BVCI=%u\n",
+			bvci);
+	} else if (TLVP_PRESENT(tp, BSSGP_IE_ROUTEING_AREA)) {
+		peer = peer_by_rac(TLVP_VAL(tp, BSSGP_IE_ROUTEING_AREA));
+		LOGPC(DGPRS, LOGL_INFO, "routing by RAC to peer BVCI=%u\n",
+			peer ? peer->bvci : -1);
+	} else if (TLVP_PRESENT(tp, BSSGP_IE_LOCATION_AREA)) {
+		peer = peer_by_lac(TLVP_VAL(tp, BSSGP_IE_LOCATION_AREA));
+		LOGPC(DGPRS, LOGL_INFO, "routing by LAC to peer BVCI=%u\n",
+			peer ? peer->bvci : -1);
+	} else
+		LOGPC(DGPRS, LOGL_INFO, "\n");
+
+	if (!peer) {
+		LOGP(DGPRS, LOGL_ERROR, "NSEI=%u(SGSN) BSSGP PAGING: "
+			"unable to route, missing IE\n", nsvc->nsei);
+		return -EINVAL;
+	}
+	return gbprox_relay2peer(msg, peer, ns_bvci);
+}
+
+/* Receive an incoming BVC-RESET message from the SGSN */
+static int rx_reset_from_sgsn(struct msgb *msg, struct tlv_parsed *tp,
+			      struct gprs_nsvc *nsvc, uint16_t ns_bvci)
+{
+	struct gbprox_peer *peer;
+	uint16_t ptp_bvci;
+
+	if (!TLVP_PRESENT(tp, BSSGP_IE_BVCI)) {
+		return bssgp_tx_status(BSSGP_CAUSE_MISSING_MAND_IE,
+				       NULL, msg);
+	}
+	ptp_bvci = ntohs(*(uint16_t *)TLVP_VAL(tp, BSSGP_IE_BVCI));
+
+	if (ptp_bvci >= 2) {
+		/* A reset for a PTP BVC was received, forward it to its
+		 * respective peer */
+		peer = peer_by_bvci(ptp_bvci);
+		if (!peer) {
+			LOGP(DGPRS, LOGL_ERROR, "NSEI=%u BVCI=%u: Cannot find BSS\n",
+				nsvc->nsei, ptp_bvci);
+			return bssgp_tx_status(BSSGP_CAUSE_UNKNOWN_BVCI,
+					       NULL, msg);
+		}
+		return gbprox_relay2peer(msg, peer, ns_bvci);
+	}
+
+	/* A reset for the Signalling entity has been received
+	 * from the SGSN.  As the signalling BVCI is shared
+	 * among all the BSS's that we multiplex, it needs to
+	 * be relayed  */
+	llist_for_each_entry(peer, &gbprox_bts_peers, list)
+		gbprox_relay2peer(msg, peer, ns_bvci);
+
+	return 0;
+}
+
+/* Receive an incoming signalling message from the SGSN-side NS-VC */
+static int gbprox_rx_sig_from_sgsn(struct msgb *msg, struct gprs_nsvc *nsvc,
+				   uint16_t ns_bvci)
+{
+	struct bssgp_normal_hdr *bgph = (struct bssgp_normal_hdr *) msgb_bssgph(msg);
+	struct tlv_parsed tp;
+	uint8_t pdu_type = bgph->pdu_type;
+	int data_len = msgb_bssgp_len(msg) - sizeof(*bgph);
+	struct gbprox_peer *peer;
+	uint16_t bvci;
+	int rc = 0;
+
+	if (ns_bvci != 0 && ns_bvci != 1) {
+		LOGP(DGPRS, LOGL_NOTICE, "NSEI=%u(SGSN) BVCI=%u is not "
+			"signalling\n", nsvc->nsei, ns_bvci);
+		/* FIXME: Send proper error message */
+		return -EINVAL;
+	}
+
+	/* we actually should never see those two for BVCI == 0, but double-check
+	 * just to make sure  */
+	if (pdu_type == BSSGP_PDUT_UL_UNITDATA ||
+	    pdu_type == BSSGP_PDUT_DL_UNITDATA) {
+		LOGP(DGPRS, LOGL_NOTICE, "NSEI=%u(SGSN) UNITDATA not allowed in "
+			"signalling\n", nsvc->nsei);
+		return bssgp_tx_status(BSSGP_CAUSE_PROTO_ERR_UNSPEC, NULL, msg);
+	}
+
+	rc = bssgp_tlv_parse(&tp, bgph->data, data_len);
+
+	switch (pdu_type) {
+	case BSSGP_PDUT_BVC_RESET:
+		rc = rx_reset_from_sgsn(msg, &tp, nsvc, ns_bvci);
+		break;
+	case BSSGP_PDUT_FLUSH_LL:
+	case BSSGP_PDUT_BVC_RESET_ACK:
+		/* simple case: BVCI IE is mandatory */
+		if (!TLVP_PRESENT(&tp, BSSGP_IE_BVCI))
+			goto err_mand_ie;
+		bvci = ntohs(*(uint16_t *)TLVP_VAL(&tp, BSSGP_IE_BVCI));
+		rc = gbprox_relay2bvci(msg, bvci, ns_bvci);
+		break;
+	case BSSGP_PDUT_PAGING_PS:
+	case BSSGP_PDUT_PAGING_CS:
+		/* process the paging request (LAC/RAC lookup) */
+		rc = gbprox_rx_paging(msg, &tp, nsvc, ns_bvci);
+		break;
+	case BSSGP_PDUT_STATUS:
+		/* Some exception has occurred */
+		LOGP(DGPRS, LOGL_NOTICE,
+			"NSEI=%u(SGSN) BSSGP STATUS ", nsvc->nsei);
+		if (!TLVP_PRESENT(&tp, BSSGP_IE_CAUSE)) {
+			LOGPC(DGPRS, LOGL_NOTICE, "\n");
+			goto err_mand_ie;
+		}
+		LOGPC(DGPRS, LOGL_NOTICE,
+			"cause=0x%02x(%s) ", *TLVP_VAL(&tp, BSSGP_IE_CAUSE),
+			bssgp_cause_str(*TLVP_VAL(&tp, BSSGP_IE_CAUSE)));
+		if (TLVP_PRESENT(&tp, BSSGP_IE_BVCI)) {
+			uint16_t *bvci = (uint16_t *)
+						TLVP_VAL(&tp, BSSGP_IE_BVCI);
+			LOGPC(DGPRS, LOGL_NOTICE,
+				"BVCI=%u\n", ntohs(*bvci));
+		} else
+			LOGPC(DGPRS, LOGL_NOTICE, "\n");
+		break;
+	/* those only exist in the SGSN -> BSS direction */
+	case BSSGP_PDUT_SUSPEND_ACK:
+	case BSSGP_PDUT_SUSPEND_NACK:
+	case BSSGP_PDUT_RESUME_ACK:
+	case BSSGP_PDUT_RESUME_NACK:
+		/* RAC IE is mandatory */
+		if (!TLVP_PRESENT(&tp, BSSGP_IE_ROUTEING_AREA))
+			goto err_mand_ie;
+		peer = peer_by_rac(TLVP_VAL(&tp, BSSGP_IE_ROUTEING_AREA));
+		if (!peer)
+			goto err_no_peer;
+		rc = gbprox_relay2peer(msg, peer, ns_bvci);
+		break;
+	case BSSGP_PDUT_BVC_BLOCK_ACK:
+	case BSSGP_PDUT_BVC_UNBLOCK_ACK:
+		if (!TLVP_PRESENT(&tp, BSSGP_IE_BVCI))
+			goto err_mand_ie;
+		bvci = ntohs(*(uint16_t *)TLVP_VAL(&tp, BSSGP_IE_BVCI));
+		if (bvci == 0) {
+			LOGP(DGPRS, LOGL_NOTICE, "NSEI=%u(SGSN) BSSGP "
+			     "%sBLOCK_ACK for signalling BVCI ?!?\n", nsvc->nsei,
+			     pdu_type == BSSGP_PDUT_BVC_UNBLOCK_ACK ? "UN":"");
+			/* should we send STATUS ? */
+		} else {
+			/* Mark BVC as (un)blocked */
+			block_unblock_peer(bvci, pdu_type);
+		}
+		rc = gbprox_relay2bvci(msg, bvci, ns_bvci);
+		break;
+	case BSSGP_PDUT_SGSN_INVOKE_TRACE:
+		LOGP(DGPRS, LOGL_ERROR,
+		     "NSEI=%u(SGSN) BSSGP INVOKE TRACE not supported\n",nsvc->nsei);
+		rc = bssgp_tx_status(BSSGP_CAUSE_PDU_INCOMP_FEAT, NULL, msg);
+		break;
+	default:
+		LOGP(DGPRS, LOGL_NOTICE, "BSSGP PDU type 0x%02x unknown\n",
+			pdu_type);
+		rc = bssgp_tx_status(BSSGP_CAUSE_PROTO_ERR_UNSPEC, NULL, msg);
+		break;
+	}
+
+	return rc;
+err_mand_ie:
+	LOGP(DGPRS, LOGL_ERROR, "NSEI=%u(SGSN) missing mandatory IE\n",
+		nsvc->nsei);
+	return bssgp_tx_status(BSSGP_CAUSE_MISSING_MAND_IE, NULL, msg);
+err_no_peer:
+	LOGP(DGPRS, LOGL_ERROR, "NSEI=%u(SGSN) cannot find peer based on RAC\n",
+		nsvc->nsei);
+	return bssgp_tx_status(BSSGP_CAUSE_UNKNOWN_BVCI, NULL, msg);
+}
+
+/* Main input function for Gb proxy */
+int gbprox_rcvmsg(struct msgb *msg, struct gprs_nsvc *nsvc, uint16_t ns_bvci)
+{
+	int rc;
+	struct gbprox_peer *peer;
+
+	/* Only BVCI=0 messages need special treatment */
+	if (ns_bvci == 0 || ns_bvci == 1) {
+		if (nsvc->remote_end_is_sgsn)
+			rc = gbprox_rx_sig_from_sgsn(msg, nsvc, ns_bvci);
+		else
+			rc = gbprox_rx_sig_from_bss(msg, nsvc, ns_bvci);
+	} else {
+		/* All other BVCI are PTP and thus can be simply forwarded */
+		if (!nsvc->remote_end_is_sgsn) {
+			return gbprox_relay2sgsn(msg, ns_bvci);
+		}
+		/* else: SGSN -> BSS direction */
+		peer = peer_by_bvci(ns_bvci);
+		if (!peer) {
+			LOGP(DGPRS, LOGL_INFO, "Allocationg new peer for "
+			     "BVCI=%u via NSVC=%u/NSEI=%u\n", ns_bvci,
+			     nsvc->nsvci, nsvc->nsei);
+			peer = peer_alloc(ns_bvci);
+			peer->nsvc = nsvc;
+		}
+		if (peer->blocked) {
+			LOGP(DGPRS, LOGL_NOTICE, "Dropping PDU for "
+			     "blocked BVCI=%u via NSVC=%u/NSEI=%u\n",
+			     ns_bvci, nsvc->nsvci, nsvc->nsei);
+			return bssgp_tx_status(BSSGP_CAUSE_BVCI_BLOCKED, NULL, msg);
+		}
+		rc = gbprox_relay2peer(msg, peer, ns_bvci);
+	}
+
+	return rc;
+}
+
+int gbprox_reset_persistent_nsvcs(struct gprs_ns_inst *nsi)
+{
+	struct gprs_nsvc *nsvc;
+
+	llist_for_each_entry(nsvc, &nsi->gprs_nsvcs, list) {
+		if (!nsvc->persistent)
+			continue;
+		gprs_nsvc_reset(nsvc, NS_CAUSE_OM_INTERVENTION);
+	}
+	return 0;
+}
+
+/* Signal handler for signals from NS layer */
+int gbprox_signal(unsigned int subsys, unsigned int signal,
+		  void *handler_data, void *signal_data)
+{
+	struct ns_signal_data *nssd = signal_data;
+	struct gprs_nsvc *nsvc = nssd->nsvc;
+	struct gbprox_peer *peer;
+
+	if (subsys != SS_NS)
+		return 0;
+
+	if (signal == S_NS_RESET && nsvc->nsei == gbcfg.nsip_sgsn_nsei) {
+		/* We have received a NS-RESET from the NSEI and NSVC
+		 * of the SGSN.  This might happen with SGSN that start
+		 * their own NS-RESET procedure without waiting for our
+		 * NS-RESET */
+		nsvc->remote_end_is_sgsn = 1;
+	}
+
+	if (signal == S_NS_ALIVE_EXP && nsvc->remote_end_is_sgsn) {
+		LOGP(DGPRS, LOGL_NOTICE, "Tns alive expired too often, "
+			"re-starting RESET procedure\n");
+		nsip_connect(nsvc->nsi, &nsvc->ip.bts_addr, nsvc->nsei,
+			     nsvc->nsvci);
+	}
+
+	if (!nsvc->remote_end_is_sgsn) {
+		/* from BSS to SGSN */
+		peer = peer_by_nsvc(nsvc);
+		if (!peer) {
+			LOGP(DGPRS, LOGL_NOTICE, "signal %u for unknown peer "
+			     "NSEI=%u/NSVCI=%u\n", signal, nsvc->nsei,
+			     nsvc->nsvci);
+			return 0;
+		}
+		switch (signal) {
+		case S_NS_RESET:
+		case S_NS_BLOCK:
+			if (!peer->blocked)
+				break;
+			LOGP(DGPRS, LOGL_NOTICE, "Converting NS_RESET from "
+			     "NSEI=%u/NSVCI=%u into BSSGP_BVC_BLOCK to SGSN\n",
+			     nsvc->nsei, nsvc->nsvci);
+			bssgp_tx_simple_bvci(BSSGP_PDUT_BVC_BLOCK, nsvc->nsei,
+					     peer->bvci, 0);
+			break;
+		}
+	} else {
+		/* iterate over all BTS peers and send the respective PDU */
+		llist_for_each_entry(peer, &gbprox_bts_peers, list) {
+			switch (signal) {
+			case S_NS_RESET:
+				gprs_ns_tx_reset(peer->nsvc, nssd->cause);
+				break;
+			case S_NS_BLOCK:
+				gprs_ns_tx_block(peer->nsvc, nssd->cause);
+				break;
+			case S_NS_UNBLOCK:
+				gprs_ns_tx_unblock(peer->nsvc);
+				break;
+			}
+		}
+	}
+	return 0;
+}
+
+
+#include <osmocom/vty/command.h>
+
+gDEFUN(show_gbproxy, show_gbproxy_cmd, "show gbproxy",
+       SHOW_STR "Display information about the Gb proxy")
+{
+	struct gbprox_peer *peer;
+
+	llist_for_each_entry(peer, &gbprox_bts_peers, list) {
+		struct gprs_nsvc *nsvc = peer->nsvc;
+		struct gprs_ra_id raid;
+		gsm48_parse_ra(&raid, peer->ra);
+
+		vty_out(vty, "NSEI %5u, NS-VC %5u, PTP-BVCI %5u, "
+			"RAC %u-%u-%u-%u",
+			nsvc->nsei, nsvc->nsvci, peer->bvci,
+			raid.mcc, raid.mnc, raid.lac, raid.rac);
+		if (nsvc->ll == GPRS_NS_LL_UDP || nsvc->ll == GPRS_NS_LL_FR_GRE)
+			vty_out(vty, " %s:%u",
+				inet_ntoa(nsvc->ip.bts_addr.sin_addr),
+				ntohs(nsvc->ip.bts_addr.sin_port));
+		if (peer->blocked)
+			vty_out(vty, " [BVC-BLOCKED]");
+
+		vty_out(vty, "%s", VTY_NEWLINE);
+	}
+	return CMD_SUCCESS;
+}
diff --git a/src/gprs/gb_proxy_main.c b/src/gprs/gb_proxy_main.c
new file mode 100644
index 000000000..b53e98579
--- /dev/null
+++ b/src/gprs/gb_proxy_main.c
@@ -0,0 +1,288 @@
+/* NS-over-IP proxy */
+
+/* (C) 2010 by Harald Welte <laforge@gnumonks.org>
+ * (C) 2010 by On-Waves
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <getopt.h>
+#include <errno.h>
+#include <signal.h>
+#include <sys/fcntl.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+#include <osmocore/talloc.h>
+#include <osmocore/select.h>
+#include <osmocore/rate_ctr.h>
+#include <osmocore/process.h>
+
+#include <openbsc/signal.h>
+#include <openbsc/debug.h>
+#include <openbsc/gprs_ns.h>
+#include <openbsc/gprs_bssgp.h>
+#include <openbsc/vty.h>
+#include <openbsc/gb_proxy.h>
+
+#include <osmocom/vty/command.h>
+#include <osmocom/vty/telnet_interface.h>
+
+#include "../../bscconfig.h"
+
+/* this is here for the vty... it will never be called */
+void subscr_put() { abort(); }
+
+#define _GNU_SOURCE
+#include <getopt.h>
+
+void *tall_bsc_ctx;
+
+const char *openbsc_copyright =
+	"Copyright (C) 2010 Harald Welte and On-Waves\r\n"
+	"License AGPLv3+: GNU AGPL version 3 or later <http://gnu.org/licenses/agpl-3.0.html>\r\n"
+	"This is free software: you are free to change and redistribute it.\r\n"
+	"There is NO WARRANTY, to the extent permitted by law.\r\n";
+
+static struct log_target *stderr_target;
+static char *config_file = "osmo_gbproxy.cfg";
+struct gbproxy_config gbcfg;
+static int daemonize = 0;
+
+/* Pointer to the SGSN peer */
+extern struct gbprox_peer *gbprox_peer_sgsn;
+
+/* call-back function for the NS protocol */
+static int proxy_ns_cb(enum gprs_ns_evt event, struct gprs_nsvc *nsvc,
+		      struct msgb *msg, u_int16_t bvci)
+{
+	int rc = 0;
+
+	switch (event) {
+	case GPRS_NS_EVT_UNIT_DATA:
+		rc = gbprox_rcvmsg(msg, nsvc, bvci);
+		break;
+	default:
+		LOGP(DGPRS, LOGL_ERROR, "SGSN: Unknown event %u from NS\n", event);
+		if (msg)
+			talloc_free(msg);
+		rc = -EIO;
+		break;
+	}
+	return rc;
+}
+
+static void signal_handler(int signal)
+{
+	fprintf(stdout, "signal %u received\n", signal);
+
+	switch (signal) {
+	case SIGINT:
+		dispatch_signal(SS_GLOBAL, S_GLOBAL_SHUTDOWN, NULL);
+		sleep(1);
+		exit(0);
+		break;
+	case SIGABRT:
+		/* in case of abort, we want to obtain a talloc report
+		 * and then return to the caller, who will abort the process */
+	case SIGUSR1:
+		talloc_report(tall_vty_ctx, stderr);
+		talloc_report_full(tall_bsc_ctx, stderr);
+		break;
+	case SIGUSR2:
+		talloc_report_full(tall_vty_ctx, stderr);
+		break;
+	default:
+		break;
+	}
+}
+
+static void print_usage()
+{
+	printf("Usage: bsc_hack\n");
+}
+
+static void print_help()
+{
+	printf("  Some useful help...\n");
+	printf("  -h --help this text\n");
+	printf("  -d option --debug=DNS:DGPRS,0:0 enable debugging\n");
+	printf("  -D --daemonize Fork the process into a background daemon\n");
+	printf("  -c --config-file filename The config file to use.\n");
+	printf("  -s --disable-color\n");
+	printf("  -T --timestamp Prefix every log line with a timestamp\n");
+	printf("  -V --version. Print the version of OpenBSC.\n");
+	printf("  -e --log-level number. Set a global loglevel.\n");
+}
+
+static void handle_options(int argc, char **argv)
+{
+	while (1) {
+		int option_index = 0, c;
+		static struct option long_options[] = {
+			{ "help", 0, 0, 'h' },
+			{ "debug", 1, 0, 'd' },
+			{ "daemonize", 0, 0, 'D' },
+			{ "config-file", 1, 0, 'c' },
+			{ "disable-color", 0, 0, 's' },
+			{ "timestamp", 0, 0, 'T' },
+			{ "version", 0, 0, 'V' },
+			{ "log-level", 1, 0, 'e' },
+			{ 0, 0, 0, 0 }
+		};
+
+		c = getopt_long(argc, argv, "hd:Dc:sTVe:",
+				long_options, &option_index);
+		if (c == -1)
+			break;
+
+		switch (c) {
+		case 'h':
+			print_usage();
+			print_help();
+			exit(0);
+		case 's':
+			log_set_use_color(stderr_target, 0);
+			break;
+		case 'd':
+			log_parse_category_mask(stderr_target, optarg);
+			break;
+		case 'D':
+			daemonize = 1;
+			break;
+		case 'c':
+			config_file = strdup(optarg);
+			break;
+		case 'T':
+			log_set_print_timestamp(stderr_target, 1);
+			break;
+		case 'e':
+			log_set_log_level(stderr_target, atoi(optarg));
+			break;
+		case 'V':
+			print_version(1);
+			exit(0);
+			break;
+		default:
+			break;
+		}
+	}
+}
+
+extern void *tall_msgb_ctx;
+
+extern enum node_type bsc_vty_go_parent(struct vty *vty);
+
+static struct vty_app_info vty_info = {
+	.name 		= "OsmoGbProxy",
+	.version	= PACKAGE_VERSION,
+	.go_parent_cb	= bsc_vty_go_parent,
+	.is_config_node	= bsc_vty_is_config_node,
+};
+
+int main(int argc, char **argv)
+{
+	struct gsm_network dummy_network;
+	int rc;
+
+	tall_bsc_ctx = talloc_named_const(NULL, 0, "nsip_proxy");
+	tall_msgb_ctx = talloc_named_const(tall_bsc_ctx, 0, "msgb");
+
+	signal(SIGINT, &signal_handler);
+	signal(SIGABRT, &signal_handler);
+	signal(SIGUSR1, &signal_handler);
+	signal(SIGUSR2, &signal_handler);
+	signal(SIGPIPE, SIG_IGN);
+
+	log_init(&log_info);
+	stderr_target = log_target_create_stderr();
+	log_add_target(stderr_target);
+	log_set_all_filter(stderr_target, 1);
+
+	vty_info.copyright = openbsc_copyright;
+	vty_init(&vty_info);
+	logging_vty_add_cmds();
+	gbproxy_vty_init();
+
+	handle_options(argc, argv);
+
+	rate_ctr_init(tall_bsc_ctx);
+
+	rc = telnet_init(tall_bsc_ctx, &dummy_network, 4246);
+	if (rc < 0)
+		exit(1);
+
+	bssgp_nsi = gprs_ns_instantiate(&proxy_ns_cb);
+	if (!bssgp_nsi) {
+		LOGP(DGPRS, LOGL_ERROR, "Unable to instantiate NS\n");
+		exit(1);
+	}
+	gbcfg.nsi = bssgp_nsi;
+	gprs_ns_vty_init(bssgp_nsi);
+	register_signal_handler(SS_NS, &gbprox_signal, NULL);
+
+	rc = gbproxy_parse_config(config_file, &gbcfg);
+	if (rc < 0) {
+		LOGP(DGPRS, LOGL_FATAL, "Cannot parse config file\n");
+		exit(2);
+	}
+
+	if (!nsvc_by_nsei(gbcfg.nsi, gbcfg.nsip_sgsn_nsei)) {
+		LOGP(DGPRS, LOGL_FATAL, "You cannot proxy to NSEI %u "
+			"without creating that NSEI before\n",
+			gbcfg.nsip_sgsn_nsei);
+		exit(2);
+	}
+
+	rc = gprs_ns_nsip_listen(bssgp_nsi);
+	if (rc < 0) {
+		LOGP(DGPRS, LOGL_FATAL, "Cannot bind/listen on NSIP socket\n");
+		exit(2);
+	}
+
+	rc = gprs_ns_frgre_listen(bssgp_nsi);
+	if (rc < 0) {
+		LOGP(DGPRS, LOGL_FATAL, "Cannot bind/listen GRE "
+			"socket. Do you have CAP_NET_RAW?\n");
+		exit(2);
+	}
+
+	if (daemonize) {
+		rc = osmo_daemonize();
+		if (rc < 0) {
+			perror("Error during daemonize");
+			exit(1);
+		}
+	}
+
+	/* Reset all the persistent NS-VCs that we've read from the config */
+	gbprox_reset_persistent_nsvcs(bssgp_nsi);
+
+	while (1) {
+		rc = bsc_select_main(0);
+		if (rc < 0)
+			exit(3);
+	}
+
+	exit(0);
+}
diff --git a/src/gprs/gb_proxy_vty.c b/src/gprs/gb_proxy_vty.c
new file mode 100644
index 000000000..05f5b1e46
--- /dev/null
+++ b/src/gprs/gb_proxy_vty.c
@@ -0,0 +1,104 @@
+/*
+ * (C) 2010 by Harald Welte <laforge@gnumonks.org>
+ * (C) 2010 by On-Waves
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+#include <osmocore/talloc.h>
+
+#include <openbsc/debug.h>
+#include <openbsc/gb_proxy.h>
+#include <openbsc/gprs_ns.h>
+#include <openbsc/vty.h>
+
+#include <osmocom/vty/command.h>
+#include <osmocom/vty/vty.h>
+
+static struct gbproxy_config *g_cfg = NULL;
+
+/*
+ * vty code for mgcp below
+ */
+static struct cmd_node gbproxy_node = {
+	GBPROXY_NODE,
+	"%s(gbproxy)#",
+	1,
+};
+
+static int config_write_gbproxy(struct vty *vty)
+{
+	vty_out(vty, "gbproxy%s", VTY_NEWLINE);
+
+	vty_out(vty, " sgsn nsei %u%s", g_cfg->nsip_sgsn_nsei,
+		VTY_NEWLINE);
+
+	return CMD_SUCCESS;
+}
+
+DEFUN(cfg_gbproxy,
+      cfg_gbproxy_cmd,
+      "gbproxy",
+      "Configure the Gb proxy")
+{
+	vty->node = GBPROXY_NODE;
+	return CMD_SUCCESS;
+}
+
+DEFUN(cfg_nsip_sgsn_nsei,
+      cfg_nsip_sgsn_nsei_cmd,
+      "sgsn nsei <0-65534>",
+      "Set the NSEI to be used in the connection with the SGSN")
+{
+	unsigned int port = atoi(argv[0]);
+
+	g_cfg->nsip_sgsn_nsei = port;
+	return CMD_SUCCESS;
+}
+
+int gbproxy_vty_init(void)
+{
+	install_element_ve(&show_gbproxy_cmd);
+
+	install_element(CONFIG_NODE, &cfg_gbproxy_cmd);
+	install_node(&gbproxy_node, config_write_gbproxy);
+	install_default(GBPROXY_NODE);
+	install_element(GBPROXY_NODE, &ournode_exit_cmd);
+	install_element(GBPROXY_NODE, &ournode_end_cmd);
+	install_element(GBPROXY_NODE, &cfg_nsip_sgsn_nsei_cmd);
+
+	return 0;
+}
+
+int gbproxy_parse_config(const char *config_file, struct gbproxy_config *cfg)
+{
+	int rc;
+
+	g_cfg = cfg;
+	rc = vty_read_config_file(config_file, NULL);
+	if (rc < 0) {
+		fprintf(stderr, "Failed to parse the config file: '%s'\n", config_file);
+		return rc;
+	}
+
+	return 0;
+}
+
diff --git a/src/gprs/gprs_gmm.c b/src/gprs/gprs_gmm.c
new file mode 100644
index 000000000..949cd96ea
--- /dev/null
+++ b/src/gprs/gprs_gmm.c
@@ -0,0 +1,1597 @@
+/* GSM Mobile Radio Interface Layer 3 messages on the A-bis interface
+ * 3GPP TS 04.08 version 7.21.0 Release 1998 / ETSI TS 100 940 V7.21.0 */
+
+/* (C) 2009-2010 by Harald Welte <laforge@gnumonks.org>
+ * (C) 2010 by On-Waves
+ *
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdint.h>
+#include <errno.h>
+
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+#include <openbsc/db.h>
+#include <osmocore/msgb.h>
+#include <osmocore/tlv.h>
+#include <osmocore/gsm_utils.h>
+#include <osmocore/signal.h>
+#include <osmocore/talloc.h>
+#include <osmocore/rate_ctr.h>
+
+#include <openbsc/debug.h>
+#include <openbsc/gsm_data.h>
+#include <openbsc/gsm_subscriber.h>
+#include <openbsc/gsm_04_08.h>
+#include <openbsc/gsm_04_08_gprs.h>
+#include <openbsc/paging.h>
+#include <openbsc/transaction.h>
+#include <openbsc/gprs_bssgp.h>
+#include <openbsc/gprs_llc.h>
+#include <openbsc/gprs_sgsn.h>
+#include <openbsc/gprs_gmm.h>
+#include <openbsc/sgsn.h>
+
+#include <pdp.h>
+
+#define PTMSI_ALLOC
+
+/* Section 11.2.2 / Table 11.4 MM timers netowkr side */
+#define GSM0408_T3322_SECS	6	/* DETACH_REQ -> DETACH_ACC */
+#define GSM0408_T3350_SECS	6	/* waiting for ATT/RAU/TMSI COMPL */
+#define GSM0408_T3360_SECS	6	/* waiting for AUTH/CIPH RESP */
+#define GSM0408_T3370_SECS	6	/* waiting for ID RESP */
+
+/* Section 11.2.2 / Table 11.4a MM timers netowkr side */
+#define GSM0408_T3313_SECS	30	/* waiting for paging response */
+#define GSM0408_T3314_SECS	44	/* force to STBY on expiry */
+#define GSM0408_T3316_SECS	44
+
+/* Section 11.3 / Table 11.2d Timers of Session Management - network side */
+#define GSM0408_T3385_SECS	8	/* wait for ACT PDP CTX REQ */
+#define GSM0408_T3386_SECS	8	/* wait for MODIFY PDP CTX ACK */
+#define GSM0408_T3395_SECS	8	/* wait for DEACT PDP CTX ACK */
+#define GSM0408_T3397_SECS	8	/* wait for DEACT AA PDP CTX ACK */
+
+extern struct sgsn_instance *sgsn;
+
+/* Protocol related stuff, should go into libosmocore */
+
+/* 10.5.5.14 GPRS MM Cause / Table 10.5.147 */
+const struct value_string gmm_cause_names[] = {
+	{ GMM_CAUSE_IMSI_UNKNOWN, 	"IMSI unknown in HLR" },
+	{ GMM_CAUSE_ILLEGAL_MS, 	"Illegal MS" },
+	{ GMM_CAUSE_ILLEGAL_ME,		"Illegal ME" },
+	{ GMM_CAUSE_GPRS_NOTALLOWED,	"GPRS services not allowed" },
+	{ GMM_CAUSE_GPRS_OTHER_NOTALLOWED,
+			"GPRS services and non-GPRS services not allowed" },
+	{ GMM_CAUSE_MS_ID_NOT_DERIVED,
+			"MS identity cannot be derived by the network" },
+	{ GMM_CAUSE_IMPL_DETACHED,	"Implicitly detached" },
+	{ GMM_CAUSE_PLMN_NOTALLOWED,	"PLMN not allowed" },
+	{ GMM_CAUSE_LA_NOTALLOWED,	"Location Area not allowed" },
+	{ GMM_CAUSE_ROAMING_NOTALLOWED,
+			"Roaming not allowed in this location area" },
+	{ GMM_CAUSE_NO_GPRS_PLMN,
+				"GPRS services not allowed in this PLMN" },
+	{ GMM_CAUSE_MSC_TEMP_NOTREACH,	"MSC temporarily not reachable" },
+	{ GMM_CAUSE_NET_FAIL,		"Network failure" },
+	{ GMM_CAUSE_CONGESTION,		"Congestion" },
+	{ GMM_CAUSE_SEM_INCORR_MSG,	"Semantically incorrect message" },
+	{ GMM_CAUSE_INV_MAND_INFO, "Invalid mandatory information" },
+	{ GMM_CAUSE_MSGT_NOTEXIST_NOTIMPL,
+			"Message type non-existant or not implemented" },
+	{ GMM_CAUSE_MSGT_INCOMP_P_STATE,
+			"Message type not compatible with protocol state" },
+	{ GMM_CAUSE_IE_NOTEXIST_NOTIMPL,
+			"Information element non-existent or not implemented" },
+	{ GMM_CAUSE_COND_IE_ERR,	"Conditional IE error" },
+	{ GMM_CAUSE_MSG_INCOMP_P_STATE,
+				"Message not compatible with protocol state " },
+	{ GMM_CAUSE_PROTO_ERR_UNSPEC,	"Protocol error, unspecified" },
+	{ 0, NULL }
+};
+
+/* 10.5.6.6 SM Cause / Table 10.5.157 */
+const struct value_string gsm_cause_names[] = {
+	{ GSM_CAUSE_INSUFF_RSRC, "Insufficient resources" },
+	{ GSM_CAUSE_MISSING_APN, "Missing or unknown APN" },
+	{ GSM_CAUSE_UNKNOWN_PDP, "Unknown PDP address or PDP type" },
+	{ GSM_CAUSE_AUTH_FAILED, "User Authentication failed" },
+	{ GSM_CAUSE_ACT_REJ_GGSN, "Activation rejected by GGSN" },
+	{ GSM_CAUSE_ACT_REJ_UNSPEC, "Activation rejected, unspecified" },
+	{ GSM_CAUSE_SERV_OPT_NOTSUPP, "Service option not supported" },
+	{ GSM_CAUSE_REQ_SERV_OPT_NOTSUB,
+				"Requested service option not subscribed" },
+	{ GSM_CAUSE_SERV_OPT_TEMP_OOO,
+				"Service option temporarily out of order" },
+	{ GSM_CAUSE_NSAPI_IN_USE, "NSAPI already used" },
+	{ GSM_CAUSE_DEACT_REGULAR, "Regular deactivation" },
+	{ GSM_CAUSE_QOS_NOT_ACCEPTED, "QoS not accepted" },
+	{ GSM_CAUSE_NET_FAIL, "Network Failure" },
+	{ GSM_CAUSE_REACT_RQD, "Reactivation required" },
+	{ GSM_CAUSE_FEATURE_NOTSUPP, "Feature not supported " },
+	{ GSM_CAUSE_INVALID_TRANS_ID, "Invalid transaction identifier" },
+	{ GSM_CAUSE_SEM_INCORR_MSG, "Semantically incorrect message" },
+	{ GSM_CAUSE_INV_MAND_INFO, "Invalid mandatory information" },
+	{ GSM_CAUSE_MSGT_NOTEXIST_NOTIMPL,
+			"Message type non-existant or not implemented" },
+	{ GSM_CAUSE_MSGT_INCOMP_P_STATE,
+			"Message type not compatible with protocol state" },
+	{ GSM_CAUSE_IE_NOTEXIST_NOTIMPL,
+			"Information element non-existent or not implemented" },
+	{ GSM_CAUSE_COND_IE_ERR, "Conditional IE error" },
+	{ GSM_CAUSE_MSG_INCOMP_P_STATE,
+				"Message not compatible with protocol state " },
+	{ GSM_CAUSE_PROTO_ERR_UNSPEC, "Protocol error, unspecified" },
+	{ 0, NULL }
+};
+
+/* 10.5.5.2 */
+const struct value_string gprs_att_t_strs[] = {
+	{ GPRS_ATT_T_ATTACH, 		"GPRS attach" },
+	{ GPRS_ATT_T_ATT_WHILE_IMSI, 	"GPRS attach while IMSI attached" },
+	{ GPRS_ATT_T_COMBINED, 		"Combined GPRS/IMSI attach" },
+	{ 0, NULL }
+};
+
+const struct value_string gprs_upd_t_strs[] = {
+	{ GPRS_UPD_T_RA,		"RA updating" },
+	{ GPRS_UPD_T_RA_LA,		"combined RA/LA updating" },
+	{ GPRS_UPD_T_RA_LA_IMSI_ATT,	"combined RA/LA updating + IMSI attach" },
+	{ GPRS_UPD_T_PERIODIC,		"periodic updating" },
+	{ 0, NULL }
+};
+
+/* 10.5.5.5 */
+const struct value_string gprs_det_t_mo_strs[] = {
+	{ GPRS_DET_T_MO_GPRS,		"GPRS detach" },
+	{ GPRS_DET_T_MO_IMSI,		"IMSI detach" },
+	{ GPRS_DET_T_MO_COMBINED,	"Combined GPRS/IMSI detach" },
+	{ 0, NULL }
+};
+
+static const struct tlv_definition gsm48_gmm_att_tlvdef = {
+	.def = {
+		[GSM48_IE_GMM_CIPH_CKSN]	= { TLV_TYPE_FIXED, 1 },
+		[GSM48_IE_GMM_TIMER_READY]	= { TLV_TYPE_TV, 1 },
+		[GSM48_IE_GMM_ALLOC_PTMSI]	= { TLV_TYPE_TLV, 0 },
+		[GSM48_IE_GMM_PTMSI_SIG]	= { TLV_TYPE_FIXED, 3 },
+		[GSM48_IE_GMM_AUTH_RAND]	= { TLV_TYPE_FIXED, 16 },
+		[GSM48_IE_GMM_AUTH_SRES]	= { TLV_TYPE_FIXED, 4 },
+		[GSM48_IE_GMM_IMEISV]		= { TLV_TYPE_TLV, 0 },
+		[GSM48_IE_GMM_DRX_PARAM]	= { TLV_TYPE_FIXED, 2 },
+		[GSM48_IE_GMM_MS_NET_CAPA]	= { TLV_TYPE_TLV, 0 },
+		[GSM48_IE_GMM_PDP_CTX_STATUS]	= { TLV_TYPE_TLV, 0 },
+		[GSM48_IE_GMM_PS_LCS_CAPA]	= { TLV_TYPE_TLV, 0 },
+		[GSM48_IE_GMM_GMM_MBMS_CTX_ST]	= { TLV_TYPE_TLV, 0 },
+	},
+};
+
+static const struct tlv_definition gsm48_sm_att_tlvdef = {
+	.def = {
+		[GSM48_IE_GSM_APN]		= { TLV_TYPE_TLV, 0 },
+		[GSM48_IE_GSM_PROTO_CONF_OPT]	= { TLV_TYPE_TLV, 0 },
+		[GSM48_IE_GSM_PDP_ADDR]		= { TLV_TYPE_TLV, 0 },
+		[GSM48_IE_GSM_AA_TMR]		= { TLV_TYPE_TV, 1 },
+		[GSM48_IE_GSM_NAME_FULL]	= { TLV_TYPE_TLV, 0 },
+		[GSM48_IE_GSM_NAME_SHORT]	= { TLV_TYPE_TLV, 0 },
+		[GSM48_IE_GSM_TIMEZONE]		= { TLV_TYPE_FIXED, 1 },
+		[GSM48_IE_GSM_UTC_AND_TZ]	= { TLV_TYPE_FIXED, 7 },
+		[GSM48_IE_GSM_LSA_ID]		= { TLV_TYPE_TLV, 0 },
+	},
+};
+
+/* Our implementation, should be kept in SGSN */
+
+static void mmctx_timer_cb(void *_mm);
+
+static void mmctx_timer_start(struct sgsn_mm_ctx *mm, unsigned int T,
+				unsigned int seconds)
+{
+	if (bsc_timer_pending(&mm->timer))
+		LOGP(DMM, LOGL_ERROR, "Starting MM timer %u while old "
+			"timer %u pending\n", T, mm->T);
+	mm->T = T;
+	mm->num_T_exp = 0;
+
+	/* FIXME: we should do this only once ? */
+	mm->timer.data = mm;
+	mm->timer.cb = &mmctx_timer_cb;
+
+	bsc_schedule_timer(&mm->timer, seconds, 0);
+}
+
+static void mmctx_timer_stop(struct sgsn_mm_ctx *mm, unsigned int T)
+{
+	if (mm->T != T)
+		LOGP(DMM, LOGL_ERROR, "Stopping MM timer %u but "
+			"%u is running\n", T, mm->T);
+	bsc_del_timer(&mm->timer);
+}
+
+/* Send a message through the underlying layer */
+static int gsm48_gmm_sendmsg(struct msgb *msg, int command,
+			     const struct sgsn_mm_ctx *mm)
+{
+	if (mm)
+		rate_ctr_inc(&mm->ctrg->ctr[GMM_CTR_PKTS_SIG_OUT]);
+
+	/* caller needs to provide TLLI, BVCI and NSEI */
+	return gprs_llc_tx_ui(msg, GPRS_SAPI_GMM, command, mm);
+}
+
+/* copy identifiers from old message to new message, this
+ * is required so lower layers can route it correctly */
+static void gmm_copy_id(struct msgb *msg, const struct msgb *old)
+{
+	msgb_tlli(msg) = msgb_tlli(old);
+	msgb_bvci(msg) = msgb_bvci(old);
+	msgb_nsei(msg) = msgb_nsei(old);
+}
+
+/* Store BVCI/NSEI in MM context */
+static void msgid2mmctx(struct sgsn_mm_ctx *mm, const struct msgb *msg)
+{
+	mm->bvci = msgb_bvci(msg);
+	mm->nsei = msgb_nsei(msg);
+}
+
+/* Store BVCI/NSEI in MM context */
+static void mmctx2msgid(struct msgb *msg, const struct sgsn_mm_ctx *mm)
+{
+	msgb_tlli(msg) = mm->tlli;
+	msgb_bvci(msg) = mm->bvci;
+	msgb_nsei(msg) = mm->nsei;
+}
+
+/* Chapter 9.4.18 */
+static int _tx_status(struct msgb *msg, uint8_t cause,
+		      struct sgsn_mm_ctx *mmctx, int sm)
+{
+	struct gsm48_hdr *gh;
+
+	/* MMCTX might be NULL! */
+
+	DEBUGP(DMM, "<- GPRS MM STATUS (cause: %s)\n",
+		get_value_string(gmm_cause_names, cause));
+
+	gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1);
+	if (sm) {
+		gh->proto_discr = GSM48_PDISC_SM_GPRS;
+		gh->msg_type = GSM48_MT_GSM_STATUS;
+	} else {
+		gh->proto_discr = GSM48_PDISC_MM_GPRS;
+		gh->msg_type = GSM48_MT_GMM_STATUS;
+	}
+	gh->data[0] = cause;
+
+	return gsm48_gmm_sendmsg(msg, 0, mmctx);
+}
+static int gsm48_tx_gmm_status(struct sgsn_mm_ctx *mmctx, uint8_t cause)
+{
+	struct msgb *msg = gsm48_msgb_alloc();
+
+	mmctx2msgid(msg, mmctx);
+	return _tx_status(msg, cause, mmctx, 0);
+};
+static int gsm48_tx_gmm_status_oldmsg(struct msgb *oldmsg, uint8_t cause)
+{
+	struct msgb *msg = gsm48_msgb_alloc();
+
+	gmm_copy_id(msg, oldmsg);
+	return _tx_status(msg, cause, NULL, 0);
+}
+static int gsm48_tx_sm_status(struct sgsn_mm_ctx *mmctx, uint8_t cause)
+{
+	struct msgb *msg = gsm48_msgb_alloc();
+
+	mmctx2msgid(msg, mmctx);
+	return _tx_status(msg, cause, mmctx, 1);
+};
+static int gsm48_tx_sm_status_oldmsg(struct msgb *oldmsg, uint8_t cause)
+{
+	struct msgb *msg = gsm48_msgb_alloc();
+
+	gmm_copy_id(msg, oldmsg);
+	return _tx_status(msg, cause, NULL, 1);
+}
+
+
+static struct gsm48_qos default_qos = {
+	.delay_class = 4,	/* best effort */
+	.reliab_class = GSM48_QOS_RC_LLC_UN_RLC_ACK_DATA_PROT,
+	.peak_tput = GSM48_QOS_PEAK_TPUT_32000bps,
+	.preced_class = GSM48_QOS_PC_NORMAL,
+	.mean_tput = GSM48_QOS_MEAN_TPUT_BEST_EFFORT,
+	.traf_class = GSM48_QOS_TC_INTERACTIVE,
+	.deliv_order = GSM48_QOS_DO_UNORDERED,
+	.deliv_err_sdu = GSM48_QOS_ERRSDU_YES,
+	.max_sdu_size = GSM48_QOS_MAXSDU_1520,
+	.max_bitrate_up = GSM48_QOS_MBRATE_63k,
+	.max_bitrate_down = GSM48_QOS_MBRATE_63k,
+	.resid_ber = GSM48_QOS_RBER_5e_2,
+	.sdu_err_ratio = GSM48_QOS_SERR_1e_2,
+	.handling_prio = 3,
+	.xfer_delay = 0x10,	/* 200ms */
+	.guar_bitrate_up = GSM48_QOS_MBRATE_0k,
+	.guar_bitrate_down = GSM48_QOS_MBRATE_0k,
+	.sig_ind = 0,	/* not optimised for signalling */
+	.max_bitrate_down_ext = 0,	/* use octet 9 */
+	.guar_bitrate_down_ext = 0,	/* use octet 13 */
+};
+
+/* Chapter 9.4.2: Attach accept */
+static int gsm48_tx_gmm_att_ack(struct sgsn_mm_ctx *mm)
+{
+	struct msgb *msg = gsm48_msgb_alloc();
+	struct gsm48_hdr *gh;
+	struct gsm48_attach_ack *aa;
+	uint8_t *ptsig, *mid;
+
+	DEBUGP(DMM, "<- GPRS ATTACH ACCEPT (new P-TMSI=0x%08x)\n", mm->p_tmsi);
+
+	mmctx2msgid(msg, mm);
+
+	gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh));
+	gh->proto_discr = GSM48_PDISC_MM_GPRS;
+	gh->msg_type = GSM48_MT_GMM_ATTACH_ACK;
+
+	aa = (struct gsm48_attach_ack *) msgb_put(msg, sizeof(*aa));
+	aa->force_stby = 0;	/* not indicated */
+	aa->att_result = 1;	/* GPRS only */
+	aa->ra_upd_timer = GPRS_TMR_MINUTE | 10;
+	aa->radio_prio = 4;	/* lowest */
+	gsm48_construct_ra(aa->ra_id.digits, &mm->ra);
+
+#if 0
+	/* Optional: P-TMSI signature */
+	msgb_v_put(msg, GSM48_IE_GMM_PTMSI_SIG);
+	ptsig = msgb_put(msg, 3);
+	ptsig[0] = mm->p_tmsi_sig >> 16;
+	ptsig[1] = mm->p_tmsi_sig >> 8;
+	ptsig[2] = mm->p_tmsi_sig & 0xff;
+
+	/* Optional: Negotiated Ready timer value */
+#endif
+
+#ifdef PTMSI_ALLOC
+	/* Optional: Allocated P-TMSI */
+	mid = msgb_put(msg, GSM48_MID_TMSI_LEN);
+	gsm48_generate_mid_from_tmsi(mid, mm->p_tmsi);
+	mid[0] = GSM48_IE_GMM_ALLOC_PTMSI;
+#endif
+
+	/* Optional: MS-identity (combined attach) */
+	/* Optional: GMM cause (partial attach result for combined attach) */
+
+	return gsm48_gmm_sendmsg(msg, 0, mm);
+}
+
+/* Chapter 9.4.5: Attach reject */
+static int _tx_gmm_att_rej(struct msgb *msg, uint8_t gmm_cause)
+{
+	struct gsm48_hdr *gh;
+
+	DEBUGP(DMM, "<- GPRS ATTACH REJECT\n");
+
+	gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1);
+	gh->proto_discr = GSM48_PDISC_MM_GPRS;
+	gh->msg_type = GSM48_MT_GMM_ATTACH_REJ;
+	gh->data[0] = gmm_cause;
+
+	return gsm48_gmm_sendmsg(msg, 0, NULL);
+}
+static int gsm48_tx_gmm_att_rej_oldmsg(const struct msgb *old_msg,
+					uint8_t gmm_cause)
+{
+	struct msgb *msg = gsm48_msgb_alloc();
+	gmm_copy_id(msg, old_msg);
+	return _tx_gmm_att_rej(msg, gmm_cause);
+}
+static int gsm48_tx_gmm_att_rej(struct sgsn_mm_ctx *mm,
+				uint8_t gmm_cause)
+{
+	struct msgb *msg = gsm48_msgb_alloc();
+	mmctx2msgid(msg, mm);
+	return _tx_gmm_att_rej(msg, gmm_cause);
+}
+
+/* Chapter 9.4.6.2 Detach accept */
+static int gsm48_tx_gmm_det_ack(struct sgsn_mm_ctx *mm, uint8_t force_stby)
+{
+	struct msgb *msg = gsm48_msgb_alloc();
+	struct gsm48_hdr *gh;
+
+	DEBUGP(DMM, "<- GPRS DETACH ACCEPT\n");
+
+	mmctx2msgid(msg, mm);
+
+	gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1);
+	gh->proto_discr = GSM48_PDISC_MM_GPRS;
+	gh->msg_type = GSM48_MT_GMM_DETACH_ACK;
+	gh->data[0] = force_stby;
+
+	return gsm48_gmm_sendmsg(msg, 0, mm);
+}
+
+/* Transmit Chapter 9.4.12 Identity Request */
+static int gsm48_tx_gmm_id_req(struct sgsn_mm_ctx *mm, uint8_t id_type)
+{
+	struct msgb *msg = gsm48_msgb_alloc();
+	struct gsm48_hdr *gh;
+
+	DEBUGP(DMM, "<- GPRS IDENTITY REQUEST: mi_type=%02x\n", id_type);
+
+	mmctx2msgid(msg, mm);
+
+	gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1);
+	gh->proto_discr = GSM48_PDISC_MM_GPRS;
+	gh->msg_type = GSM48_MT_GMM_ID_REQ;
+	/* 10.5.5.9 ID type 2 + identity type and 10.5.5.7 'force to standby' IE */
+	gh->data[0] = id_type & 0xf;
+
+	return gsm48_gmm_sendmsg(msg, 1, mm);
+}
+
+/* Section 9.4.9: Authentication and Ciphering Request */
+static int gsm48_tx_gmm_auth_ciph_req(struct sgsn_mm_ctx *mm, uint8_t *rand,
+				      uint8_t key_seq, uint8_t algo)
+{
+	struct msgb *msg = gsm48_msgb_alloc();
+	struct gsm48_hdr *gh;
+	struct gsm48_auth_ciph_req *acreq;
+	uint8_t *m_rand, *m_cksn;
+
+	DEBUGP(DMM, "<- GPRS AUTH AND CIPHERING REQ (rand = %s)\n",
+		hexdump(rand, 16));
+
+	mmctx2msgid(msg, mm);
+
+	gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh));
+	gh->proto_discr = GSM48_PDISC_MM_GPRS;
+	gh->msg_type = GSM48_MT_GMM_AUTH_CIPH_REQ;
+
+	acreq = (struct gsm48_auth_ciph_req *) msgb_put(msg, sizeof(*acreq));
+	acreq->ciph_alg = algo & 0xf;
+	acreq->imeisv_req = 0x1;
+	acreq->force_stby = 0x0;
+	acreq->ac_ref_nr = 0x0;	/* FIXME: increment this? */
+
+	/* Only if authentication is requested we need to set RAND + CKSN */
+	if (rand) {
+		m_rand = msgb_put(msg, 16+1);
+		m_rand[0] = GSM48_IE_GMM_AUTH_RAND;
+		memcpy(m_rand+1, rand, 16);
+
+		m_cksn = msgb_put(msg, 1+1);
+		m_cksn[0] = GSM48_IE_GMM_CIPH_CKSN;
+		m_cksn[1] = key_seq;
+	}
+
+	/* Start T3360 */
+	mmctx_timer_start(mm, 3360, GSM0408_T3360_SECS);
+
+	/* FIXME: make sure we don't send any other messages to the MS */
+
+	return gsm48_gmm_sendmsg(msg, 1, mm);
+}
+
+/* Section 9.4.11: Authentication and Ciphering Reject */
+static int gsm48_tx_gmm_auth_ciph_rej(struct sgsn_mm_ctx *mm)
+{
+	struct msgb *msg = gsm48_msgb_alloc();
+	struct gsm48_hdr *gh;
+
+	DEBUGP(DMM, "<- GPRS AUTH AND CIPH REJECT\n");
+
+	mmctx2msgid(msg, mm);
+
+	gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh));
+	gh->proto_discr = GSM48_PDISC_MM_GPRS;
+	gh->msg_type = GSM48_MT_GMM_AUTH_CIPH_REJ;
+
+	return gsm48_gmm_sendmsg(msg, 0, mm);
+}
+
+/* Section 9.4.10: Authentication and Ciphering Response */
+static int gsm48_rx_gmm_auth_ciph_resp(struct sgsn_mm_ctx *ctx,
+					struct msgb *msg)
+{
+	struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg);
+	struct gsm48_auth_ciph_resp *acr = (struct gsm48_auth_ciph_resp *)gh->data;
+	struct tlv_parsed tp;
+	int rc;
+
+	/* FIXME: Stop T3360 */
+
+	rc = tlv_parse(&tp, &gsm48_gmm_att_tlvdef, acr->data,
+			(msg->data + msg->len) - acr->data, 0, 0);
+
+	/* FIXME: compare ac_ref? */
+
+	if (!TLVP_PRESENT(&tp, GSM48_IE_GMM_AUTH_SRES) ||
+	    !TLVP_PRESENT(&tp, GSM48_IE_GMM_IMEISV)) {
+		/* FIXME: missing mandatory IE */
+	}
+
+	/* FIXME: compare SRES with what we expected */
+	/* FIXME: enable LLC cipheirng */
+	return 0;
+}
+
+/* Check if we can already authorize a subscriber */
+static int gsm48_gmm_authorize(struct sgsn_mm_ctx *ctx,
+				enum gprs_t3350_mode t3350_mode)
+{
+	if (strlen(ctx->imei) && strlen(ctx->imsi)) {
+#ifdef PTMSI_ALLOC
+		/* Start T3350 and re-transmit up to 5 times until ATTACH COMPLETE */
+		ctx->t3350_mode = t3350_mode;
+		mmctx_timer_start(ctx, 3350, GSM0408_T3350_SECS);
+#endif
+		ctx->mm_state = GMM_REGISTERED_NORMAL;
+		return gsm48_tx_gmm_att_ack(ctx);
+	} 
+	if (!strlen(ctx->imei)) {
+		ctx->mm_state = GMM_COMMON_PROC_INIT;
+		ctx->t3370_id_type = GSM_MI_TYPE_IMEI;
+		mmctx_timer_start(ctx, 3370, GSM0408_T3370_SECS);
+		return gsm48_tx_gmm_id_req(ctx, GSM_MI_TYPE_IMEI);
+	}
+
+	if (!strlen(ctx->imsi)) {
+		ctx->mm_state = GMM_COMMON_PROC_INIT;
+		ctx->t3370_id_type = GSM_MI_TYPE_IMSI;
+		mmctx_timer_start(ctx, 3370, GSM0408_T3370_SECS);
+		return gsm48_tx_gmm_id_req(ctx, GSM_MI_TYPE_IMSI);
+	}
+
+	return 0;
+}
+
+/* Parse Chapter 9.4.13 Identity Response */
+static int gsm48_rx_gmm_id_resp(struct sgsn_mm_ctx *ctx, struct msgb *msg)
+{
+	struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg);
+	uint8_t mi_type = gh->data[1] & GSM_MI_TYPE_MASK;
+	char mi_string[GSM48_MI_SIZE];
+
+	gsm48_mi_to_string(mi_string, sizeof(mi_string), &gh->data[1], gh->data[0]);
+	DEBUGP(DMM, "-> GMM IDENTITY RESPONSE: mi_type=0x%02x MI(%s) ",
+		mi_type, mi_string);
+
+	if (!ctx) {
+		DEBUGP(DMM, "from unknown TLLI 0x%08x?!?\n", msgb_tlli(msg));
+		return -EINVAL;
+	}
+
+	if (mi_type == ctx->t3370_id_type)
+		mmctx_timer_stop(ctx, 3370);
+
+	switch (mi_type) {
+	case GSM_MI_TYPE_IMSI:
+		/* we already have a mm context with current TLLI, but no
+		 * P-TMSI / IMSI yet.  What we now need to do is to fill
+		 * this initial context with data from the HLR */
+		if (strlen(ctx->imsi) == 0) {
+			/* Check if we already have a MM context for this IMSI */
+			struct sgsn_mm_ctx *ictx;
+			ictx = sgsn_mm_ctx_by_imsi(mi_string);
+			if (ictx) {
+				DEBUGP(DMM, "Deleting old MM Context for same IMSI ",
+				       "p_tmsi_old=0x%08x, p_tmsi_new=0x%08x\n",
+					ictx->p_tmsi, ctx->p_tmsi);
+				gprs_llgmm_assign(ictx->llme, ictx->tlli,
+						  0xffffffff, GPRS_ALGO_GEA0, NULL);
+				sgsn_mm_ctx_free(ictx);
+			}
+		}
+		strncpy(ctx->imsi, mi_string, sizeof(ctx->imei));
+		break;
+	case GSM_MI_TYPE_IMEI:
+		strncpy(ctx->imei, mi_string, sizeof(ctx->imei));
+		break;
+	case GSM_MI_TYPE_IMEISV:
+		break;
+	}
+
+	DEBUGPC(DMM, "\n");
+	/* Check if we can let the mobile station enter */
+	return gsm48_gmm_authorize(ctx, ctx->t3350_mode);
+}
+
+/* Section 9.4.1 Attach request */
+static int gsm48_rx_gmm_att_req(struct sgsn_mm_ctx *ctx, struct msgb *msg,
+				struct gprs_llc_llme *llme)
+{
+	struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg);
+	uint8_t *cur = gh->data, *msnc, *mi, *old_ra_info, *ms_ra_acc_cap;
+	uint8_t msnc_len, att_type, mi_len, mi_type, ms_ra_acc_cap_len;
+	uint16_t drx_par;
+	uint32_t tmsi;
+	char mi_string[GSM48_MI_SIZE];
+	struct gprs_ra_id ra_id;
+	uint16_t cid;
+
+	DEBUGP(DMM, "-> GMM ATTACH REQUEST ");
+
+	/* As per TS 04.08 Chapter 4.7.1.4, the attach request arrives either
+	 * with a foreign TLLI (P-TMSI that was allocated to the MS before),
+	 * or with random TLLI. */
+
+	cid = bssgp_parse_cell_id(&ra_id, msgb_bcid(msg));
+
+	/* MS network capability 10.5.5.12 */
+	msnc_len = *cur++;
+	msnc = cur;
+	if (msnc_len > 8)
+		goto err_inval;
+	cur += msnc_len;
+
+	/* aTTACH Type 10.5.5.2 */
+	att_type = *cur++ & 0x0f;
+
+	/* DRX parameter 10.5.5.6 */
+	drx_par = *cur++ << 8;
+	drx_par |= *cur++;
+
+	/* Mobile Identity (P-TMSI or IMSI) 10.5.1.4 */
+	mi_len = *cur++;
+	mi = cur;
+	if (mi_len > 8)
+		goto err_inval;
+	mi_type = *mi & GSM_MI_TYPE_MASK;
+	cur += mi_len;
+
+	gsm48_mi_to_string(mi_string, sizeof(mi_string), mi, mi_len);
+
+	DEBUGPC(DMM, "MI(%s) type=\"%s\" ", mi_string,
+		get_value_string(gprs_att_t_strs, att_type));
+
+	/* Old routing area identification 10.5.5.15 */
+	old_ra_info = cur;
+	cur += 6;
+
+	/* MS Radio Access Capability 10.5.5.12a */
+	ms_ra_acc_cap_len = *cur++;
+	ms_ra_acc_cap = cur;
+	if (ms_ra_acc_cap_len > 51)
+		goto err_inval;
+
+	/* Optional: Old P-TMSI Signature, Requested READY timer, TMSI Status */
+
+	switch (mi_type) {
+	case GSM_MI_TYPE_IMSI:
+		/* Try to find MM context based on IMSI */
+		if (!ctx)
+			ctx = sgsn_mm_ctx_by_imsi(mi_string);
+		if (!ctx) {
+#if 0
+			return gsm48_tx_gmm_att_rej(msg, GMM_CAUSE_IMSI_UNKNOWN);
+#else
+			/* As a temorary hack, we simply assume that the IMSI exists,
+			 * as long as it is part of 'our' network */
+			char mccmnc[16];
+			snprintf(mccmnc, sizeof(mccmnc), "%03d%02d", ra_id.mcc, ra_id.mnc);
+			if (strncmp(mccmnc, mi_string, 5)) {
+				LOGP(DMM, LOGL_INFO, "Rejecting ATTACH REQUESET IMSI=%s\n",
+				     mi_string);
+				return gsm48_tx_gmm_att_rej_oldmsg(msg,
+								GMM_CAUSE_GPRS_NOTALLOWED);
+			}
+			ctx = sgsn_mm_ctx_alloc(0, &ra_id);
+			if (!ctx)
+				return gsm48_tx_gmm_att_rej_oldmsg(msg, GMM_CAUSE_NET_FAIL);
+			strncpy(ctx->imsi, mi_string, sizeof(ctx->imsi));
+#endif
+		}
+		ctx->tlli = msgb_tlli(msg);
+		ctx->llme = llme;
+		msgid2mmctx(ctx, msg);
+		break;
+	case GSM_MI_TYPE_TMSI:
+		memcpy(&tmsi, mi+1, 4);
+		tmsi = ntohl(tmsi);
+		/* Try to find MM context based on P-TMSI */
+		if (!ctx)
+			ctx = sgsn_mm_ctx_by_ptmsi(tmsi);
+		if (!ctx) {
+			/* Allocate a context as most of our code expects one.
+			 * Context will not have an IMSI ultil ID RESP is received */
+			ctx = sgsn_mm_ctx_alloc(msgb_tlli(msg), &ra_id);
+			ctx->p_tmsi = tmsi;
+		}
+		ctx->tlli = msgb_tlli(msg);
+		ctx->llme = llme;
+		msgid2mmctx(ctx, msg);
+		break;
+	default:
+		LOGP(DMM, LOGL_NOTICE, "Rejecting ATTACH REQUEST with "
+			"MI type %u\n", mi_type);
+		return gsm48_tx_gmm_att_rej_oldmsg(msg, GMM_CAUSE_MS_ID_NOT_DERIVED);
+	}
+	/* Update MM Context with currient RA and Cell ID */
+	ctx->ra = ra_id;
+	ctx->cell_id = cid;
+	/* Update MM Context with other data */
+	ctx->drx_parms = drx_par;
+	ctx->ms_radio_access_capa.len = ms_ra_acc_cap_len;
+	memcpy(ctx->ms_radio_access_capa.buf, ms_ra_acc_cap, ms_ra_acc_cap_len);
+	ctx->ms_network_capa.len = msnc_len;
+	memcpy(ctx->ms_network_capa.buf, msnc, msnc_len);
+
+#ifdef PTMSI_ALLOC
+	/* Allocate a new P-TMSI (+ P-TMSI signature) and update TLLI */
+	ctx->p_tmsi_old = ctx->p_tmsi;
+	ctx->p_tmsi = sgsn_alloc_ptmsi();
+#endif
+	/* Even if there is no P-TMSI allocated, the MS will switch from
+	 * foreign TLLI to local TLLI */
+	ctx->tlli_new = gprs_tmsi2tlli(ctx->p_tmsi, TLLI_LOCAL);
+
+	/* Inform LLC layer about new TLLI but keep old active */
+	gprs_llgmm_assign(ctx->llme, ctx->tlli, ctx->tlli_new,
+			  GPRS_ALGO_GEA0, NULL);
+
+	DEBUGPC(DMM, "\n");
+	return ctx ? gsm48_gmm_authorize(ctx, GMM_T3350_MODE_ATT) : 0;
+
+err_inval:
+	DEBUGPC(DMM, "\n");
+	return gsm48_tx_gmm_att_rej_oldmsg(msg, GMM_CAUSE_SEM_INCORR_MSG);
+}
+
+/* Section 4.7.4.1 / 9.4.5.2 MO Detach request */
+static int gsm48_rx_gmm_det_req(struct sgsn_mm_ctx *ctx, struct msgb *msg)
+{
+	struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg);
+	struct sgsn_pdp_ctx *pdp, *pdp2;
+	uint8_t detach_type, power_off;
+	int rc;
+
+	detach_type = gh->data[0] & 0x7;
+	power_off = gh->data[0] & 0x8;
+
+	/* FIXME: In 24.008 there is an optional P-TMSI and P-TMSI signature IE */
+
+	DEBUGP(DMM, "-> GMM DETACH REQUEST TLLI=0x%08x type=%s %s\n",
+		msgb_tlli(msg), get_value_string(gprs_det_t_mo_strs, detach_type),
+		power_off ? "Power-off" : "");
+
+	/* Mark MM state as deregistered */
+	ctx->mm_state = GMM_DEREGISTERED;
+
+	/* delete all existing PDP contexts for this MS */
+	llist_for_each_entry_safe(pdp, pdp2, &ctx->pdp_list, list) {
+		LOGP(DMM, LOGL_NOTICE, "Dropping PDP context for NSAPI=%u "
+		     "due to GPRS DETACH REQUEST\n", pdp->nsapi);
+		sgsn_delete_pdp_ctx(pdp);
+		/* FIXME: the callback wants to transmit a DEACT PDP CTX ACK,
+		 * which is quite stupid for a MS that has just detached.. */
+	}
+
+	/* force_stby = 0 */
+	rc = gsm48_tx_gmm_det_ack(ctx, 0);
+
+	/* TLLI unassignment */
+	gprs_llgmm_assign(ctx->llme, ctx->tlli, 0xffffffff,
+			  GPRS_ALGO_GEA0, NULL);
+
+	return rc;
+}
+
+/* Chapter 9.4.15: Routing area update accept */
+static int gsm48_tx_gmm_ra_upd_ack(struct sgsn_mm_ctx *mm)
+{
+	struct msgb *msg = gsm48_msgb_alloc();
+	struct gsm48_hdr *gh;
+	struct gsm48_ra_upd_ack *rua;
+	uint8_t *mid;
+
+	DEBUGP(DMM, "<- ROUTING AREA UPDATE ACCEPT\n");
+
+	mmctx2msgid(msg, mm);
+
+	gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh));
+	gh->proto_discr = GSM48_PDISC_MM_GPRS;
+	gh->msg_type = GSM48_MT_GMM_RA_UPD_ACK;
+
+	rua = (struct gsm48_ra_upd_ack *) msgb_put(msg, sizeof(*rua));
+	rua->force_stby = 0;	/* not indicated */
+	rua->upd_result = 0;	/* RA updated */
+	rua->ra_upd_timer = GPRS_TMR_MINUTE | 10;
+
+	gsm48_construct_ra(rua->ra_id.digits, &mm->ra);
+
+#if 0
+	/* Optional: P-TMSI signature */
+	msgb_v_put(msg, GSM48_IE_GMM_PTMSI_SIG);
+	ptsig = msgb_put(msg, 3);
+	ptsig[0] = mm->p_tmsi_sig >> 16;
+	ptsig[1] = mm->p_tmsi_sig >> 8;
+	ptsig[2] = mm->p_tmsi_sig & 0xff;
+#endif
+
+#ifdef PTMSI_ALLOC
+	/* Optional: Allocated P-TMSI */
+	mid = msgb_put(msg, GSM48_MID_TMSI_LEN);
+	gsm48_generate_mid_from_tmsi(mid, mm->p_tmsi);
+	mid[0] = GSM48_IE_GMM_ALLOC_PTMSI;
+#endif
+
+	/* Option: MS ID, ... */
+	return gsm48_gmm_sendmsg(msg, 0, mm);
+}
+
+/* Chapter 9.4.17: Routing area update reject */
+static int gsm48_tx_gmm_ra_upd_rej(struct msgb *old_msg, uint8_t cause)
+{
+	struct msgb *msg = gsm48_msgb_alloc();
+	struct gsm48_hdr *gh;
+
+	DEBUGP(DMM, "<- ROUTING AREA UPDATE REJECT\n");
+
+	gmm_copy_id(msg, old_msg);
+
+	gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 2);
+	gh->proto_discr = GSM48_PDISC_MM_GPRS;
+	gh->msg_type = GSM48_MT_GMM_RA_UPD_REJ;
+	gh->data[0] = cause;
+	gh->data[1] = 0; /* ? */
+
+	/* Option: P-TMSI signature, allocated P-TMSI, MS ID, ... */
+	return gsm48_gmm_sendmsg(msg, 0, NULL);
+}
+
+static void process_ms_ctx_status(struct sgsn_mm_ctx *mmctx,
+				  uint16_t pdp_status)
+{
+	struct sgsn_pdp_ctx *pdp, *pdp2;
+	/* 24.008 4.7.5.1.3: If the PDP context status information element is
+	 * included in ROUTING AREA UPDATE REQUEST message, then the network
+	 * shall deactivate all those PDP contexts locally (without peer to
+	 * peer signalling between the MS and the network), which are not in SM
+	 * state PDP-INACTIVE on network side but are indicated by the MS as
+	 * being in state PDP-INACTIVE. */
+
+	llist_for_each_entry_safe(pdp, pdp2, &mmctx->pdp_list, list) {
+		if (!(pdp_status & (1 << pdp->nsapi))) {
+			LOGP(DMM, LOGL_NOTICE, "Dropping PDP context for NSAPI=%u "
+				"due to PDP CTX STATUS IE= 0x%04x\n",
+				pdp->nsapi, pdp_status);
+			sgsn_delete_pdp_ctx(pdp);
+		}
+	}
+}
+
+/* Chapter 9.4.14: Routing area update request */
+static int gsm48_rx_gmm_ra_upd_req(struct sgsn_mm_ctx *mmctx, struct msgb *msg,
+				   struct gprs_llc_llme *llme)
+{
+	struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg);
+	uint8_t *cur = gh->data;
+	uint8_t *ms_ra_acc_cap;
+	uint8_t ms_ra_acc_cap_len;
+	struct gprs_ra_id old_ra_id;
+	struct tlv_parsed tp;
+	uint8_t upd_type;
+	int rc;
+
+	/* Update Type 10.5.5.18 */
+	upd_type = *cur++ & 0x0f;
+
+	DEBUGP(DMM, "-> GMM RA UPDATE REQUEST type=\"%s\" ",
+		get_value_string(gprs_upd_t_strs, upd_type));
+
+	/* Old routing area identification 10.5.5.15 */
+	gsm48_parse_ra(&old_ra_id, cur);
+	cur += 6;
+
+	/* MS Radio Access Capability 10.5.5.12a */
+	ms_ra_acc_cap_len = *cur++;
+	ms_ra_acc_cap = cur;
+
+	/* Optional: Old P-TMSI Signature, Requested READY timer, TMSI Status,
+	 * DRX parameter, MS network capability */
+	rc = tlv_parse(&tp, &gsm48_gmm_att_tlvdef, cur,
+			(msg->data + msg->len) - cur, 0, 0);
+
+	switch (upd_type) {
+	case GPRS_UPD_T_RA_LA:
+	case GPRS_UPD_T_RA_LA_IMSI_ATT:
+		DEBUGPC(DMM, " unsupported in Mode III, is your SI13 corrupt?\n");
+		return gsm48_tx_gmm_ra_upd_rej(msg, GMM_CAUSE_PROTO_ERR_UNSPEC);
+		break;
+	case GPRS_UPD_T_RA:
+	case GPRS_UPD_T_PERIODIC:
+		break;
+	}
+
+	/* Look-up the MM context based on old RA-ID and TLLI */
+	mmctx = sgsn_mm_ctx_by_tlli(msgb_tlli(msg), &old_ra_id);
+	if (!mmctx || mmctx->mm_state == GMM_DEREGISTERED) {
+		/* The MS has to perform GPRS attach */
+		DEBUGPC(DMM, " REJECT\n");
+		/* Device is still IMSI atached for CS but initiate GPRS ATTACH */
+		return gsm48_tx_gmm_ra_upd_rej(msg, GMM_CAUSE_MS_ID_NOT_DERIVED);
+	}
+
+	/* Store new BVCI/NSEI in MM context (FIXME: delay until we ack?) */
+	msgid2mmctx(mmctx, msg);
+	/* Bump the statistics of received signalling msgs for this MM context */
+	rate_ctr_inc(&mmctx->ctrg->ctr[GMM_CTR_PKTS_SIG_IN]);
+
+	/* Update the MM context with the new RA-ID */
+	bssgp_parse_cell_id(&mmctx->ra, msgb_bcid(msg));
+	/* Update the MM context with the new (i.e. foreign) TLLI */
+	mmctx->tlli = msgb_tlli(msg);
+	/* FIXME: Update the MM context with the MS radio acc capabilities */
+	/* FIXME: Update the MM context with the MS network capabilities */
+
+	rate_ctr_inc(&mmctx->ctrg->ctr[GMM_CTR_RA_UPDATE]);
+
+	DEBUGPC(DMM, " ACCEPT\n");
+#ifdef PTMSI_ALLOC
+	mmctx->p_tmsi_old = mmctx->p_tmsi;
+	mmctx->p_tmsi = sgsn_alloc_ptmsi();
+	/* Start T3350 and re-transmit up to 5 times until ATTACH COMPLETE */
+	mmctx->t3350_mode = GMM_T3350_MODE_RAU;
+	mmctx_timer_start(mmctx, 3350, GSM0408_T3350_SECS);
+#endif
+	/* Even if there is no P-TMSI allocated, the MS will switch from
+	 * foreign TLLI to local TLLI */
+	mmctx->tlli_new = gprs_tmsi2tlli(mmctx->p_tmsi, TLLI_LOCAL);
+
+	/* Inform LLC layer about new TLLI but keep old active */
+	gprs_llgmm_assign(mmctx->llme, mmctx->tlli, mmctx->tlli_new,
+			  GPRS_ALGO_GEA0, NULL);
+
+	/* Look at PDP Context Status IE and see if MS's view of
+	 * activated/deactivated NSAPIs agrees with our view */
+	if (TLVP_PRESENT(&tp, GSM48_IE_GMM_PDP_CTX_STATUS)) {
+		uint16_t pdp_status = ntohs(*(uint16_t *)
+				TLVP_VAL(&tp, GSM48_IE_GMM_PDP_CTX_STATUS));
+		process_ms_ctx_status(mmctx, pdp_status);
+	}
+
+	/* Send RA UPDATE ACCEPT */
+	return gsm48_tx_gmm_ra_upd_ack(mmctx);
+}
+
+static int gsm48_rx_gmm_status(struct sgsn_mm_ctx *mmctx, struct msgb *msg)
+{
+	struct gsm48_hdr *gh = msgb_l3(msg);
+
+	DEBUGP(DMM, "-> GPRS MM STATUS (cause: %s)\n",
+		get_value_string(gmm_cause_names, gh->data[0]));
+
+	return 0;
+}
+
+/* GPRS Mobility Management */
+static int gsm0408_rcv_gmm(struct sgsn_mm_ctx *mmctx, struct msgb *msg,
+			   struct gprs_llc_llme *llme)
+{
+	struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg);
+	int rc;
+
+	/* MMCTX can be NULL when called */
+
+	if (!mmctx &&
+	    gh->msg_type != GSM48_MT_GMM_ATTACH_REQ &&
+	    gh->msg_type != GSM48_MT_GMM_RA_UPD_REQ) {
+		LOGP(DMM, LOGL_NOTICE, "Cannot handle GMM for unknown MM CTX\n");
+		return gsm48_tx_gmm_status_oldmsg(msg, GMM_CAUSE_MS_ID_NOT_DERIVED);
+	}
+
+	switch (gh->msg_type) {
+	case GSM48_MT_GMM_RA_UPD_REQ:
+		rc = gsm48_rx_gmm_ra_upd_req(mmctx, msg, llme);
+		break;
+	case GSM48_MT_GMM_ATTACH_REQ:
+		rc = gsm48_rx_gmm_att_req(mmctx, msg, llme);
+		break;
+	case GSM48_MT_GMM_ID_RESP:
+		rc = gsm48_rx_gmm_id_resp(mmctx, msg);
+		break;
+	case GSM48_MT_GMM_STATUS:
+		rc = gsm48_rx_gmm_status(mmctx, msg);
+		break;
+	case GSM48_MT_GMM_DETACH_REQ:
+		rc = gsm48_rx_gmm_det_req(mmctx, msg);
+		break;
+	case GSM48_MT_GMM_ATTACH_COMPL:
+		/* only in case SGSN offered new P-TMSI */
+		DEBUGP(DMM, "-> ATTACH COMPLETE\n");
+		mmctx_timer_stop(mmctx, 3350);
+		mmctx->p_tmsi_old = 0;
+		/* Unassign the old TLLI */
+		mmctx->tlli = mmctx->tlli_new;
+		gprs_llgmm_assign(mmctx->llme, 0xffffffff, mmctx->tlli_new,
+				  GPRS_ALGO_GEA0, NULL);
+		break;
+	case GSM48_MT_GMM_RA_UPD_COMPL:
+		/* only in case SGSN offered new P-TMSI */
+		DEBUGP(DMM, "-> ROUTEING AREA UPDATE COMPLETE\n");
+		mmctx_timer_stop(mmctx, 3350);
+		mmctx->p_tmsi_old = 0;
+		/* Unassign the old TLLI */
+		mmctx->tlli = mmctx->tlli_new;
+		gprs_llgmm_assign(mmctx->llme, 0xffffffff, mmctx->tlli_new,
+				  GPRS_ALGO_GEA0, NULL);
+		break;
+	case GSM48_MT_GMM_PTMSI_REALL_COMPL:
+		DEBUGP(DMM, "-> PTMSI REALLLICATION COMPLETE\n");
+		mmctx_timer_stop(mmctx, 3350);
+		mmctx->p_tmsi_old = 0;
+		/* Unassign the old TLLI */
+		mmctx->tlli = mmctx->tlli_new;
+		//gprs_llgmm_assign(mmctx->llme, 0xffffffff, mmctx->tlli_new, GPRS_ALGO_GEA0, NULL);
+		break;
+	case GSM48_MT_GMM_AUTH_CIPH_RESP:
+		rc = gsm48_rx_gmm_auth_ciph_resp(mmctx, msg);
+		break;
+	default:
+		DEBUGP(DMM, "Unknown GSM 04.08 GMM msg type 0x%02x\n",
+			gh->msg_type);
+		rc = gsm48_tx_gmm_status(mmctx, GMM_CAUSE_MSGT_NOTEXIST_NOTIMPL);
+		break;
+	}
+
+	return rc;
+}
+
+static void mmctx_timer_cb(void *_mm)
+{
+	struct sgsn_mm_ctx *mm = _mm;
+
+	mm->num_T_exp++;
+
+	switch (mm->T) {
+	case 3350:	/* waiting for ATTACH COMPLETE */
+		if (mm->num_T_exp >= 5) {
+			LOGP(DMM, LOGL_NOTICE, "T3350 expired >= 5 times\n");
+			mm->mm_state = GMM_DEREGISTERED;
+			/* FIXME: should we return some error? */
+			break;
+		}
+		/* re-transmit the respective msg and re-start timer */
+		switch (mm->t3350_mode) {
+		case GMM_T3350_MODE_ATT:
+			gsm48_tx_gmm_att_ack(mm);
+			break;
+		case GMM_T3350_MODE_RAU:
+			gsm48_tx_gmm_ra_upd_ack(mm);
+			break;
+		case GMM_T3350_MODE_PTMSI_REALL:
+			/* FIXME */
+			break;
+		}
+		bsc_schedule_timer(&mm->timer, GSM0408_T3350_SECS, 0);
+		break;
+	case 3360:	/* waiting for AUTH AND CIPH RESP */
+		if (mm->num_T_exp >= 5) {
+			LOGP(DMM, LOGL_NOTICE, "T3360 expired >= 5 times\n");
+			mm->mm_state = GMM_DEREGISTERED;
+			break;
+		}
+		/* FIXME: re-transmit the respective msg and re-start timer */
+		bsc_schedule_timer(&mm->timer, GSM0408_T3360_SECS, 0);
+		break;
+	case 3370:	/* waiting for IDENTITY RESPONSE */
+		if (mm->num_T_exp >= 5) {
+			LOGP(DMM, LOGL_NOTICE, "T3370 expired >= 5 times\n");
+			gsm48_tx_gmm_att_rej(mm, GMM_CAUSE_MS_ID_NOT_DERIVED);
+			mm->mm_state = GMM_DEREGISTERED;
+			break;
+		}
+		/* re-tranmit IDENTITY REQUEST and re-start timer */
+		gsm48_tx_gmm_id_req(mm, mm->t3370_id_type);
+		bsc_schedule_timer(&mm->timer, GSM0408_T3370_SECS, 0);
+		break;
+	default:
+		LOGP(DMM, LOGL_ERROR, "timer expired in unknown mode %u\n",
+			mm->T);
+	}
+}
+
+/* GPRS SESSION MANAGEMENT */
+
+static void pdpctx_timer_cb(void *_mm);
+
+static void pdpctx_timer_start(struct sgsn_pdp_ctx *pdp, unsigned int T,
+				unsigned int seconds)
+{
+	if (bsc_timer_pending(&pdp->timer))
+		LOGP(DMM, LOGL_ERROR, "Starting MM timer %u while old "
+			"timer %u pending\n", T, pdp->T);
+	pdp->T = T;
+	pdp->num_T_exp = 0;
+
+	/* FIXME: we should do this only once ? */
+	pdp->timer.data = pdp;
+	pdp->timer.cb = &pdpctx_timer_cb;
+
+	bsc_schedule_timer(&pdp->timer, seconds, 0);
+}
+
+
+static void msgb_put_pdp_addr_ipv4(struct msgb *msg, uint32_t ipaddr)
+{
+	uint8_t v[6];
+
+	v[0] = PDP_TYPE_ORG_IETF;
+	v[1] = PDP_TYPE_N_IETF_IPv4;
+	*(uint32_t *)(v+2) = htonl(ipaddr);
+
+	msgb_tlv_put(msg, GSM48_IE_GSM_PDP_ADDR, sizeof(v), v);
+}
+
+static void msgb_put_pdp_addr_ppp(struct msgb *msg)
+{
+	uint8_t v[2];
+
+	v[0] = PDP_TYPE_ORG_ETSI;
+	v[1] = PDP_TYPE_N_ETSI_PPP;
+
+	msgb_tlv_put(msg, GSM48_IE_GSM_PDP_ADDR, sizeof(v), v);
+}
+
+/* Section 9.5.2: Ativate PDP Context Accept */
+int gsm48_tx_gsm_act_pdp_acc(struct sgsn_pdp_ctx *pdp)
+{
+	struct msgb *msg = gsm48_msgb_alloc();
+	struct gsm48_hdr *gh;
+	uint8_t transaction_id = pdp->ti ^ 0x8; /* flip */
+
+	DEBUGP(DMM, "<- ACTIVATE PDP CONTEXT ACK\n");
+
+	mmctx2msgid(msg, pdp->mm);
+
+	gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh));
+	gh->proto_discr = GSM48_PDISC_SM_GPRS | (transaction_id << 4);
+	gh->msg_type = GSM48_MT_GSM_ACT_PDP_ACK;
+
+	/* Negotiated LLC SAPI */
+	msgb_v_put(msg, pdp->sapi);
+
+	/* FIXME: copy QoS parameters from original request */
+	//msgb_lv_put(msg, pdp->lib->qos_neg.l, pdp->lib->qos_neg.v);
+	msgb_lv_put(msg, sizeof(default_qos), (uint8_t *)&default_qos);
+
+	/* Radio priority 10.5.7.2 */
+	msgb_v_put(msg, pdp->lib->radio_pri);
+
+	/* PDP address */
+	/* Highest 4 bits of first byte need to be set to 1, otherwise
+	 * the IE is identical with the 04.08 PDP Address IE */
+	pdp->lib->eua.v[0] &= ~0xf0;
+	msgb_tlv_put(msg, GSM48_IE_GSM_PDP_ADDR,
+		     pdp->lib->eua.l, pdp->lib->eua.v);
+	pdp->lib->eua.v[0] |= 0xf0;
+
+	/* Optional: Protocol configuration options (FIXME: why 'req') */
+	if (pdp->lib->pco_req.l && pdp->lib->pco_req.v)
+		msgb_tlv_put(msg, GSM48_IE_GSM_PROTO_CONF_OPT,
+			     pdp->lib->pco_req.l, pdp->lib->pco_req.v);
+
+	/* Optional: Packet Flow Identifier */
+
+	return gsm48_gmm_sendmsg(msg, 0, pdp->mm);
+}
+
+/* Section 9.5.3: Activate PDP Context reject */
+int gsm48_tx_gsm_act_pdp_rej(struct sgsn_mm_ctx *mm, uint8_t tid,
+			     uint8_t cause, uint8_t pco_len, uint8_t *pco_v)
+{
+	struct msgb *msg = gsm48_msgb_alloc();
+	struct gsm48_hdr *gh;
+	uint8_t transaction_id = tid ^ 0x8; /* flip */
+
+	DEBUGP(DMM, "<- ACTIVATE PDP CONTEXT REJ(cause=%u)\n", cause);
+
+	mmctx2msgid(msg, mm);
+
+	gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh));
+	gh->proto_discr = GSM48_PDISC_SM_GPRS | (transaction_id << 4);
+	gh->msg_type = GSM48_MT_GSM_ACT_PDP_REJ;
+
+	msgb_v_put(msg, cause);
+	if (pco_len && pco_v)
+		msgb_tlv_put(msg, GSM48_IE_GSM_PROTO_CONF_OPT, pco_len, pco_v);
+
+	return gsm48_gmm_sendmsg(msg, 0, mm);
+}
+
+/* Section 9.5.8: Deactivate PDP Context Request */
+static int _gsm48_tx_gsm_deact_pdp_req(struct sgsn_mm_ctx *mm, uint8_t tid,
+					uint8_t sm_cause)
+{
+	struct msgb *msg = gsm48_msgb_alloc();
+	struct gsm48_hdr *gh;
+	uint8_t transaction_id = tid ^ 0x8; /* flip */
+
+	DEBUGP(DMM, "<- DEACTIVATE PDP CONTEXT REQ\n");
+
+	mmctx2msgid(msg, mm);
+
+	gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh));
+	gh->proto_discr = GSM48_PDISC_SM_GPRS | (transaction_id << 4);
+	gh->msg_type = GSM48_MT_GSM_DEACT_PDP_REQ;
+
+	msgb_v_put(msg, sm_cause);
+
+	return gsm48_gmm_sendmsg(msg, 0, mm);
+}
+int gsm48_tx_gsm_deact_pdp_req(struct sgsn_pdp_ctx *pdp, uint8_t sm_cause)
+{
+	pdpctx_timer_start(pdp, 3395, GSM0408_T3395_SECS);
+
+	return _gsm48_tx_gsm_deact_pdp_req(pdp->mm, pdp->ti, sm_cause);
+}
+
+/* Section 9.5.9: Deactivate PDP Context Accept */
+static int _gsm48_tx_gsm_deact_pdp_acc(struct sgsn_mm_ctx *mm, uint8_t tid)
+{
+	struct msgb *msg = gsm48_msgb_alloc();
+	struct gsm48_hdr *gh;
+	uint8_t transaction_id = tid ^ 0x8; /* flip */
+
+	DEBUGP(DMM, "<- DEACTIVATE PDP CONTEXT ACK\n");
+
+	mmctx2msgid(msg, mm);
+
+	gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh));
+	gh->proto_discr = GSM48_PDISC_SM_GPRS | (transaction_id << 4);
+	gh->msg_type = GSM48_MT_GSM_DEACT_PDP_ACK;
+
+	return gsm48_gmm_sendmsg(msg, 0, mm);
+}
+int gsm48_tx_gsm_deact_pdp_acc(struct sgsn_pdp_ctx *pdp)
+{
+	return _gsm48_tx_gsm_deact_pdp_acc(pdp->mm, pdp->ti);
+}
+
+/* Section 9.5.1: Activate PDP Context Request */
+static int gsm48_rx_gsm_act_pdp_req(struct sgsn_mm_ctx *mmctx,
+				    struct msgb *msg)
+{
+	struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg);
+	struct gsm48_act_pdp_ctx_req *act_req = (struct gsm48_act_pdp_ctx_req *) gh->data;
+	uint8_t req_qos_len, req_pdpa_len;
+	uint8_t *req_qos, *req_pdpa;
+	struct tlv_parsed tp;
+	uint8_t transaction_id = (gh->proto_discr >> 4);
+	struct sgsn_ggsn_ctx *ggsn;
+	struct sgsn_pdp_ctx *pdp;
+
+	DEBUGP(DMM, "-> ACTIVATE PDP CONTEXT REQ: SAPI=%u NSAPI=%u ",
+		act_req->req_llc_sapi, act_req->req_nsapi);
+
+	/* FIXME: length checks! */
+	req_qos_len = act_req->data[0];
+	req_qos = act_req->data + 1;	/* 10.5.6.5 */
+	req_pdpa_len = act_req->data[1 + req_qos_len];
+	req_pdpa = act_req->data + 1 + req_qos_len + 1;	/* 10.5.6.4 */
+
+	/* Optional: Access Point Name, Protocol Config Options */
+	if (req_pdpa + req_pdpa_len < msg->data + msg->len)
+		tlv_parse(&tp, &gsm48_sm_att_tlvdef, req_pdpa + req_pdpa_len,
+			  (msg->data + msg->len) - (req_pdpa + req_pdpa_len), 0, 0);
+	else
+		memset(&tp, 0, sizeof(tp));
+
+	switch (req_pdpa[0] & 0xf) {
+	case 0x0:
+		DEBUGPC(DMM, "ETSI ");
+		break;
+	case 0x1:
+		DEBUGPC(DMM, "IETF ");
+		break;
+	case 0xf:
+		DEBUGPC(DMM, "Empty ");
+		break;
+	}
+
+	switch (req_pdpa[1]) {
+	case 0x21:
+		DEBUGPC(DMM, "IPv4 ");
+		if (req_pdpa_len >= 6) {
+			struct in_addr ia;
+			ia.s_addr = ntohl(*((uint32_t *) (req_pdpa+2)));
+			DEBUGPC(DMM, "%s ", inet_ntoa(ia));
+		}
+		break;
+	case 0x57:
+		DEBUGPC(DMM, "IPv6 ");
+		if (req_pdpa_len >= 18) {
+			/* FIXME: print IPv6 address */
+		}
+		break;
+	default:	
+		DEBUGPC(DMM, "0x%02x ", req_pdpa[1]);
+		break;
+	}
+
+	DEBUGPC(DMM, "\n");
+
+	/* put the non-TLV elements in the TLV parser structure to
+	 * pass them on to the SGSN / GTP code */
+	tp.lv[OSMO_IE_GSM_REQ_QOS].len = req_qos_len;
+	tp.lv[OSMO_IE_GSM_REQ_QOS].val = req_qos;
+	tp.lv[OSMO_IE_GSM_REQ_PDP_ADDR].len = req_pdpa_len;
+	tp.lv[OSMO_IE_GSM_REQ_PDP_ADDR].val = req_pdpa;
+
+	/* FIXME:  determine GGSN based on APN and subscription options */
+	if (TLVP_PRESENT(&tp, GSM48_IE_GSM_APN)) {}
+
+	/* Check if NSAPI is out of range (TS 04.65 / 7.2) */
+	if (act_req->req_nsapi < 5 || act_req->req_nsapi > 15) {
+		/* Send reject with GSM_CAUSE_INV_MAND_INFO */
+		return gsm48_tx_gsm_act_pdp_rej(mmctx, transaction_id,
+						GSM_CAUSE_INV_MAND_INFO,
+						0, NULL);
+	}
+
+	/* Check if NSAPI is already in use */
+	pdp = sgsn_pdp_ctx_by_nsapi(mmctx, act_req->req_nsapi);
+	if (pdp) {
+		/* We already have a PDP context for this TLLI + NSAPI tuple */
+		if (pdp->sapi == act_req->req_llc_sapi &&
+		    pdp->ti == transaction_id) {
+			/* This apparently is a re-transmission of a PDP CTX
+			 * ACT REQ (our ACT ACK must have got dropped) */
+			return gsm48_tx_gsm_act_pdp_acc(pdp);
+		}
+
+		/* Send reject with GSM_CAUSE_NSAPI_IN_USE */
+		return gsm48_tx_gsm_act_pdp_rej(mmctx, transaction_id,
+						GSM_CAUSE_NSAPI_IN_USE,
+						0, NULL);
+	}
+
+	/* Only increment counter for a real activation, after we checked
+	 * for re-transmissions */
+	rate_ctr_inc(&mmctx->ctrg->ctr[GMM_CTR_PDP_CTX_ACT]);
+
+	ggsn = sgsn_ggsn_ctx_by_id(0);
+	if (!ggsn) {
+		LOGP(DGPRS, LOGL_ERROR, "No GGSN context 0 found!\n");
+		return -EIO;
+	}
+	ggsn->gsn = sgsn->gsn;
+	pdp = sgsn_create_pdp_ctx(ggsn, mmctx, act_req->req_nsapi, &tp);
+	if (!pdp)
+		return -1;
+
+	/* Store SAPI and Transaction Identifier */
+	pdp->sapi = act_req->req_llc_sapi;
+	pdp->ti = transaction_id;
+
+	return 0;
+}
+
+/* Section 9.5.8: Deactivate PDP Context Request */
+static int gsm48_rx_gsm_deact_pdp_req(struct sgsn_mm_ctx *mm, struct msgb *msg)
+{
+	struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg);
+	uint8_t transaction_id = (gh->proto_discr >> 4);
+	struct sgsn_pdp_ctx *pdp;
+
+	DEBUGP(DMM, "-> DEACTIVATE PDP CONTEXT REQ (cause: %s)\n",
+		get_value_string(gsm_cause_names, gh->data[0]));
+
+	pdp = sgsn_pdp_ctx_by_tid(mm, transaction_id);
+	if (!pdp) {
+		LOGP(DMM, LOGL_NOTICE, "Deactivate PDP Context Request for "
+			"non-existing PDP Context (IMSI=%s, TI=%u)\n",
+			mm->imsi, transaction_id);
+		return _gsm48_tx_gsm_deact_pdp_acc(mm, transaction_id);
+	}
+
+	return sgsn_delete_pdp_ctx(pdp);
+}
+
+/* Section 9.5.9: Deactivate PDP Context Accept */
+static int gsm48_rx_gsm_deact_pdp_ack(struct sgsn_mm_ctx *mm, struct msgb *msg)
+{
+	struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg);
+	uint8_t transaction_id = (gh->proto_discr >> 4);
+	struct sgsn_pdp_ctx *pdp;
+
+	DEBUGP(DMM, "-> DEACTIVATE PDP CONTEXT ACK\n");
+
+	pdp = sgsn_pdp_ctx_by_tid(mm, transaction_id);
+	if (!pdp) {
+		LOGP(DMM, LOGL_NOTICE, "Deactivate PDP Context Accept for "
+			"non-existing PDP Context (IMSI=%s, TI=%u)\n",
+			mm->imsi, transaction_id);
+		return 0;
+	}
+
+	return sgsn_delete_pdp_ctx(pdp);
+}
+
+static int gsm48_rx_gsm_status(struct sgsn_mm_ctx *ctx, struct msgb *msg)
+{
+	struct gsm48_hdr *gh = msgb_l3(msg);
+
+	DEBUGP(DMM, "-> GPRS SM STATUS (cause: %s)\n",
+		get_value_string(gsm_cause_names, gh->data[0]));
+
+	return 0;
+}
+
+static void pdpctx_timer_cb(void *_pdp)
+{
+	struct sgsn_pdp_ctx *pdp = _pdp;
+
+	pdp->num_T_exp++;
+
+	switch (pdp->T) {
+	case 3395:	/* waiting for PDP CTX DEACT ACK */
+		if (pdp->num_T_exp >= 4) {
+			LOGP(DMM, LOGL_NOTICE, "T3395 expired >= 5 times\n");
+			pdp->state = PDP_STATE_INACTIVE;
+			sgsn_delete_pdp_ctx(pdp);
+			break;
+		}
+		gsm48_tx_gsm_deact_pdp_req(pdp, GSM_CAUSE_NET_FAIL); 
+		bsc_schedule_timer(&pdp->timer, GSM0408_T3395_SECS, 0);
+		break;
+	default:
+		LOGP(DMM, LOGL_ERROR, "timer expired in unknown mode %u\n",
+			pdp->T);
+	}
+}
+
+
+/* GPRS Session Management */
+static int gsm0408_rcv_gsm(struct sgsn_mm_ctx *mmctx, struct msgb *msg,
+			   struct gprs_llc_llme *llme)
+{
+	struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg);
+	int rc;
+
+	/* MMCTX can be NULL when called */
+
+	if (!mmctx) {
+		LOGP(DMM, LOGL_NOTICE, "Cannot handle SM for unknown MM CTX\n");
+		gsm48_tx_gmm_status_oldmsg(msg, GMM_CAUSE_IMPL_DETACHED);
+		return gsm48_tx_sm_status_oldmsg(msg, GSM_CAUSE_PROTO_ERR_UNSPEC);
+	}
+
+	switch (gh->msg_type) {
+	case GSM48_MT_GSM_ACT_PDP_REQ:
+		rc = gsm48_rx_gsm_act_pdp_req(mmctx, msg);
+		break;
+	case GSM48_MT_GSM_DEACT_PDP_REQ:
+		rc = gsm48_rx_gsm_deact_pdp_req(mmctx, msg);
+		break;
+	case GSM48_MT_GSM_DEACT_PDP_ACK:
+		rc = gsm48_rx_gsm_deact_pdp_ack(mmctx, msg);
+		break;
+	case GSM48_MT_GSM_STATUS:
+		rc = gsm48_rx_gsm_status(mmctx, msg);
+		break;
+	case GSM48_MT_GSM_REQ_PDP_ACT_REJ:
+	case GSM48_MT_GSM_ACT_AA_PDP_REQ:
+	case GSM48_MT_GSM_DEACT_AA_PDP_REQ:
+		DEBUGP(DMM, "Unimplemented GSM 04.08 GSM msg type 0x%02x\n",
+			gh->msg_type);
+		rc = gsm48_tx_sm_status(mmctx, GSM_CAUSE_MSGT_NOTEXIST_NOTIMPL);
+		break;
+	default:
+		DEBUGP(DMM, "Unknown GSM 04.08 GSM msg type 0x%02x\n",
+			gh->msg_type);
+		rc = gsm48_tx_sm_status(mmctx, GSM_CAUSE_MSGT_NOTEXIST_NOTIMPL);
+		break;
+
+	}
+
+	return rc;
+}
+
+/* Main entry point for incoming 04.08 GPRS messages */
+int gsm0408_gprs_rcvmsg(struct msgb *msg, struct gprs_llc_llme *llme)
+{
+	struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg);
+	uint8_t pdisc = gh->proto_discr & 0x0f;
+	struct sgsn_mm_ctx *mmctx;
+	struct gprs_ra_id ra_id;
+	int rc = -EINVAL;
+
+	bssgp_parse_cell_id(&ra_id, msgb_bcid(msg));
+	mmctx = sgsn_mm_ctx_by_tlli(msgb_tlli(msg), &ra_id);
+	if (mmctx) {
+		msgid2mmctx(mmctx, msg);
+		rate_ctr_inc(&mmctx->ctrg->ctr[GMM_CTR_PKTS_SIG_IN]);
+		mmctx->llme = llme;
+	}
+
+	/* MMCTX can be NULL */
+
+	switch (pdisc) {
+	case GSM48_PDISC_MM_GPRS:
+		rc = gsm0408_rcv_gmm(mmctx, msg, llme);
+		break;
+	case GSM48_PDISC_SM_GPRS:
+		rc = gsm0408_rcv_gsm(mmctx, msg, llme);
+		break;
+	default:
+		DEBUGP(DMM, "Unknown GSM 04.08 discriminator 0x%02x\n",
+			pdisc);
+		/* FIXME: return status message */
+		break;
+	}
+
+	return rc;
+}
+
+int gprs_gmm_rx_suspend(struct gprs_ra_id *raid, uint32_t tlli)
+{
+	struct sgsn_mm_ctx *mmctx;
+
+	mmctx = sgsn_mm_ctx_by_tlli(tlli, raid);
+	if (!mmctx) {
+		LOGP(DMM, LOGL_NOTICE, "SUSPEND request for unknown "
+			"TLLI=%08x\n", tlli);
+		return -EINVAL;
+	}
+
+	if (mmctx->mm_state != GMM_REGISTERED_NORMAL) {
+		LOGP(DMM, LOGL_NOTICE, "SUSPEND request while state "
+			"!= REGISTERED (TLLI=%08x)\n", tlli);
+		return -EINVAL;
+	}
+
+	/* Transition from REGISTERED_NORMAL to REGISTERED_SUSPENDED */
+	mmctx->mm_state = GMM_REGISTERED_SUSPENDED;
+	return 0;
+}
+
+int gprs_gmm_rx_resume(struct gprs_ra_id *raid, uint32_t tlli,
+		       uint8_t suspend_ref)
+{
+	struct sgsn_mm_ctx *mmctx;
+
+	/* FIXME: make use of suspend reference? */
+
+	mmctx = sgsn_mm_ctx_by_tlli(tlli, raid);
+	if (!mmctx) {
+		LOGP(DMM, LOGL_NOTICE, "RESUME request for unknown "
+			"TLLI=%08x\n", tlli);
+		return -EINVAL;
+	}
+
+	if (mmctx->mm_state != GMM_REGISTERED_SUSPENDED) {
+		LOGP(DMM, LOGL_NOTICE, "RESUME request while state "
+			"!= SUSPENDED (TLLI=%08x)\n", tlli);
+		/* FIXME: should we not simply ignore it? */
+		return -EINVAL;
+	}
+
+	/* Transition from SUSPENDED to NORMAL */
+	mmctx->mm_state = GMM_REGISTERED_NORMAL;
+	return 0;
+}
diff --git a/src/gprs/gprs_llc.c b/src/gprs/gprs_llc.c
new file mode 100644
index 000000000..7991f4c1e
--- /dev/null
+++ b/src/gprs/gprs_llc.c
@@ -0,0 +1,852 @@
+/* GPRS LLC protocol implementation as per 3GPP TS 04.64 */
+
+/* (C) 2009-2010 by Harald Welte <laforge@gnumonks.org>
+ *
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <errno.h>
+#include <stdint.h>
+
+#include <osmocore/msgb.h>
+#include <osmocore/linuxlist.h>
+#include <osmocore/timer.h>
+#include <osmocore/talloc.h>
+
+#include <openbsc/gsm_data.h>
+#include <openbsc/debug.h>
+#include <openbsc/gprs_sgsn.h>
+#include <openbsc/gprs_gmm.h>
+#include <openbsc/gprs_bssgp.h>
+#include <openbsc/gprs_llc.h>
+#include <openbsc/crc24.h>
+
+/* Section 8.9.9 LLC layer parameter default values */
+static const struct gprs_llc_params llc_default_params[] = {
+	[1] = {
+		.t200_201	= 5,
+		.n200		= 3,
+		.n201_u		= 400,
+	},
+	[2] = {
+		.t200_201	= 5,
+		.n200		= 3,
+		.n201_u		= 270,
+	},
+	[3] = {
+		.iov_i_exp	= 27,
+		.t200_201	= 5,
+		.n200		= 3,
+		.n201_u		= 500,
+		.n201_i		= 1503,
+		.mD		= 1520,
+		.mU		= 1520,
+		.kD		= 16,
+		.kU		= 16,
+	},
+	[5] = {
+		.iov_i_exp	= 27,
+		.t200_201	= 10,
+		.n200		= 3,
+		.n201_u		= 500,
+		.n201_i		= 1503,
+		.mD		= 760,
+		.mU		= 760,
+		.kD		= 8,
+		.kU		= 8,
+	},
+	[7] = {
+		.t200_201	= 20,
+		.n200		= 3,
+		.n201_u		= 270,
+	},
+	[8] = {
+		.t200_201	= 20,
+		.n200		= 3,
+		.n201_u		= 270,
+	},
+	[9] = {
+		.iov_i_exp	= 27,
+		.t200_201	= 20,
+		.n200		= 3,
+		.n201_u		= 500,
+		.n201_i		= 1503,
+		.mD		= 380,
+		.mU		= 380,
+		.kD		= 4,
+		.kU		= 4,
+	},
+	[11] = {
+		.iov_i_exp	= 27,
+		.t200_201	= 40,
+		.n200		= 3,
+		.n201_u		= 500,
+		.n201_i		= 1503,
+		.mD		= 190,
+		.mU		= 190,
+		.kD		= 2,
+		.kU		= 2,
+	},
+};
+
+LLIST_HEAD(gprs_llc_llmes);
+void *llc_tall_ctx;
+
+/* If the TLLI is foreign, return its local version */
+static inline uint32_t tlli_foreign2local(uint32_t tlli)
+{
+	uint32_t new_tlli;
+
+	if (gprs_tlli_type(tlli) == TLLI_FOREIGN) {
+		new_tlli = tlli | 0x40000000;
+		DEBUGP(DLLC, "TLLI 0x%08x is foreign, converting to "
+			"local TLLI 0x%08x\n", tlli, new_tlli);
+	} else
+		new_tlli = tlli;
+
+	return new_tlli;
+}
+
+/* lookup LLC Entity based on DLCI (TLLI+SAPI tuple) */
+static struct gprs_llc_lle *lle_by_tlli_sapi(uint32_t tlli, uint8_t sapi)
+{
+	struct gprs_llc_llme *llme;
+
+	tlli = tlli_foreign2local(tlli);
+
+	llist_for_each_entry(llme, &gprs_llc_llmes, list) {
+		if (llme->tlli == tlli || llme->old_tlli == tlli)
+			return &llme->lle[sapi];
+	}
+	return NULL;
+}
+
+static void lle_init(struct gprs_llc_llme *llme, uint8_t sapi)
+{
+	struct gprs_llc_lle *lle = &llme->lle[sapi];
+
+	lle->llme = llme;
+	lle->sapi = sapi;
+	lle->state = GPRS_LLES_UNASSIGNED;
+
+	/* Initialize according to parameters */
+	memcpy(&lle->params, &llc_default_params[sapi], sizeof(lle->params));
+}
+
+static struct gprs_llc_llme *llme_alloc(uint32_t tlli)
+{
+	struct gprs_llc_llme *llme;
+	uint32_t i;
+
+	llme = talloc_zero(llc_tall_ctx, struct gprs_llc_llme);
+	if (!llme)
+		return NULL;
+
+	llme->tlli = tlli;
+	llme->old_tlli = 0xffffffff;
+	llme->state = GPRS_LLMS_UNASSIGNED;
+
+	for (i = 0; i < ARRAY_SIZE(llme->lle); i++)
+		lle_init(llme, i);
+
+	llist_add(&llme->list, &gprs_llc_llmes);
+
+	return llme;
+}
+
+static void llme_free(struct gprs_llc_llme *llme)
+{
+	llist_del(&llme->list);
+	talloc_free(llme);
+}
+
+enum gprs_llc_cmd {
+	GPRS_LLC_NULL,
+	GPRS_LLC_RR,
+	GPRS_LLC_ACK,
+	GPRS_LLC_RNR,
+	GPRS_LLC_SACK,
+	GPRS_LLC_DM,
+	GPRS_LLC_DISC,
+	GPRS_LLC_UA,
+	GPRS_LLC_SABM,
+	GPRS_LLC_FRMR,
+	GPRS_LLC_XID,
+	GPRS_LLC_UI,
+};
+
+static const struct value_string llc_cmd_strs[] = {
+	{ GPRS_LLC_NULL,	"NULL" },
+	{ GPRS_LLC_RR,		"RR" },
+	{ GPRS_LLC_ACK,		"ACK" },
+	{ GPRS_LLC_RNR,		"RNR" },
+	{ GPRS_LLC_SACK,	"SACK" },
+	{ GPRS_LLC_DM,		"DM" },
+	{ GPRS_LLC_DISC,	"DISC" },
+	{ GPRS_LLC_UA,		"UA" },
+	{ GPRS_LLC_SABM,	"SABM" },
+	{ GPRS_LLC_FRMR,	"FRMR" },
+	{ GPRS_LLC_XID,		"XID" },
+	{ GPRS_LLC_UI,		"UI" },
+	{ 0, NULL }
+};
+
+struct gprs_llc_hdr_parsed {
+	uint8_t sapi;
+	uint8_t is_cmd:1,
+		 ack_req:1,
+		 is_encrypted:1;
+	uint32_t seq_rx;
+	uint32_t seq_tx;
+	uint32_t fcs;
+	uint32_t fcs_calc;
+	uint8_t *data;
+	uint16_t data_len;
+	uint16_t crc_length;
+	enum gprs_llc_cmd cmd;
+};
+
+#define LLC_ALLOC_SIZE 16384
+#define UI_HDR_LEN	3
+#define N202		4
+#define CRC24_LENGTH	3
+
+static int gprs_llc_fcs(uint8_t *data, unsigned int len)
+{
+	uint32_t fcs_calc;
+
+	fcs_calc = crc24_calc(INIT_CRC24, data, len);
+	fcs_calc = ~fcs_calc;
+	fcs_calc &= 0xffffff;
+
+	return fcs_calc;
+}
+
+static void t200_expired(void *data)
+{
+	struct gprs_llc_lle *lle = data;
+
+	/* 8.5.1.3: Expiry of T200 */
+
+	if (lle->retrans_ctr >= lle->params.n200) {
+		/* FIXME: LLGM-STATUS-IND, LL-RELEASE-IND/CNF */
+		lle->state = GPRS_LLES_ASSIGNED_ADM;
+	}
+
+	switch (lle->state) {
+	case GPRS_LLES_LOCAL_EST:
+		/* FIXME: retransmit SABM */
+		/* FIXME: re-start T200 */
+		lle->retrans_ctr++;
+		break;
+	case GPRS_LLES_LOCAL_REL:
+		/* FIXME: retransmit DISC */
+		/* FIXME: re-start T200 */
+		lle->retrans_ctr++;
+		break;
+	}
+
+}
+
+static void t201_expired(void *data)
+{
+	struct gprs_llc_lle *lle = data;
+
+	if (lle->retrans_ctr < lle->params.n200) {
+		/* FIXME: transmit apropriate supervisory frame (8.6.4.1) */
+		/* FIXME: set timer T201 */
+		lle->retrans_ctr++;
+	}
+}
+
+int gprs_llc_tx_u(struct msgb *msg, uint8_t sapi, int command,
+		  enum gprs_llc_u_cmd u_cmd, int pf_bit)
+{
+	uint8_t *fcs, *llch;
+	uint8_t addr, ctrl;
+	uint32_t fcs_calc;
+
+	/* Identifiers from UP: (TLLI, SAPI) + (BVCI, NSEI) */
+
+	/* Address Field */
+	addr = sapi & 0xf;
+	if (command)
+		addr |= 0x40;
+
+	/* 6.3 Figure 8 */
+	ctrl = 0xe0 | u_cmd;
+	if (pf_bit)
+		ctrl |= 0x10;
+
+	/* prepend LLC UI header */
+	llch = msgb_push(msg, 2);
+	llch[0] = addr;
+	llch[1] = ctrl;
+
+	/* append FCS to end of frame */
+	fcs = msgb_put(msg, 3);
+	fcs_calc = gprs_llc_fcs(llch, fcs - llch);
+	fcs[0] = fcs_calc & 0xff;
+	fcs[1] = (fcs_calc >> 8) & 0xff;
+	fcs[2] = (fcs_calc >> 16) & 0xff;
+
+	/* Identifiers passed down: (BVCI, NSEI) */
+
+	/* Send BSSGP-DL-UNITDATA.req */
+	return gprs_bssgp_tx_dl_ud(msg, NULL);
+}
+
+/* Send XID response to LLE */
+static int gprs_llc_tx_xid(struct gprs_llc_lle *lle, struct msgb *msg)
+{
+	/* copy identifiers from LLE to ensure lower layers can route */
+	msgb_tlli(msg) = lle->llme->tlli;
+	msgb_bvci(msg) = lle->llme->bvci;
+	msgb_nsei(msg) = lle->llme->nsei;
+
+	return gprs_llc_tx_u(msg, lle->sapi, 0, GPRS_LLC_U_XID, 1);
+}
+
+/* Transmit a UI frame over the given SAPI */
+int gprs_llc_tx_ui(struct msgb *msg, uint8_t sapi, int command,
+		   void *mmctx)
+{
+	struct gprs_llc_lle *lle;
+	uint8_t *fcs, *llch;
+	uint8_t addr, ctrl[2];
+	uint32_t fcs_calc;
+	uint16_t nu = 0;
+	uint32_t oc;
+
+	/* Identifiers from UP: (TLLI, SAPI) + (BVCI, NSEI) */
+
+	/* look-up or create the LL Entity for this (TLLI, SAPI) tuple */
+	lle = lle_by_tlli_sapi(msgb_tlli(msg), sapi);
+	if (!lle) {
+		struct gprs_llc_llme *llme;
+		LOGP(DLLC, LOGL_ERROR, "LLC TX: unknown TLLI 0x%08x, "
+			"creating LLME on the fly\n", msgb_tlli(msg));
+		llme = llme_alloc(msgb_tlli(msg));
+		lle = &llme->lle[sapi];
+	}
+
+	if (msg->len > lle->params.n201_u) {
+		LOGP(DLLC, LOGL_ERROR, "Cannot Tx %u bytes (N201-U=%u)\n",
+			msg->len, lle->params.n201_u);
+		return -EFBIG;
+	}
+
+	/* Update LLE's (BVCI, NSEI) tuple */
+	lle->llme->bvci = msgb_bvci(msg);
+	lle->llme->nsei = msgb_nsei(msg);
+
+	/* Obtain current values for N(u) and OC */
+	nu = lle->vu_send;
+	oc = lle->oc_ui_send;
+	/* Increment V(U) */
+	lle->vu_send = (lle->vu_send + 1) % 512;
+	/* Increment Overflow Counter, if needed */
+	if ((lle->vu_send + 1) / 512)
+		lle->oc_ui_send += 512;
+
+	/* Address Field */
+	addr = sapi & 0xf;
+	if (command)
+		addr |= 0x40;
+
+	/* Control Field */
+	ctrl[0] = 0xc0;
+	ctrl[0] |= nu >> 6;
+	ctrl[1] = (nu << 2) & 0xfc;
+	ctrl[1] |= 0x01; /* Protected Mode */
+
+	/* prepend LLC UI header */
+	llch = msgb_push(msg, 3);
+	llch[0] = addr;
+	llch[1] = ctrl[0];
+	llch[2] = ctrl[1];
+
+	/* append FCS to end of frame */
+	fcs = msgb_put(msg, 3);
+	fcs_calc = gprs_llc_fcs(llch, fcs - llch);
+	fcs[0] = fcs_calc & 0xff;
+	fcs[1] = (fcs_calc >> 8) & 0xff;
+	fcs[2] = (fcs_calc >> 16) & 0xff;
+
+	/* encrypt information field + FCS, if needed! */
+	if (lle->llme->algo != GPRS_ALGO_GEA0) {
+		uint32_t iov_ui = 0; /* FIXME: randomly select for TLLI */
+		uint16_t crypt_len = (fcs + 3) - (llch + 3);
+		uint8_t cipher_out[GSM0464_CIPH_MAX_BLOCK];
+		uint32_t iv;
+		int rc, i;
+		uint64_t kc = *(uint64_t *)&lle->llme->kc;
+
+		/* Compute the 'Input' Paraemeter */
+		iv = gprs_cipher_gen_input_ui(iov_ui, sapi, nu, oc);
+
+		/* Compute the keystream that we need to XOR with the data */
+		rc = gprs_cipher_run(cipher_out, crypt_len, lle->llme->algo,
+				     kc, iv, GPRS_CIPH_SGSN2MS);
+		if (rc < 0) {
+			LOGP(DLLC, LOGL_ERROR, "Error crypting UI frame: %d\n", rc);
+			return rc;
+		}
+
+		/* XOR the cipher output with the information field + FCS */
+		for (i = 0; i < crypt_len; i++)
+			*(llch + 3 + i) ^= cipher_out[i];
+
+		/* Mark frame as encrypted */
+		ctrl[1] |= 0x02;
+	}
+
+	/* Identifiers passed down: (BVCI, NSEI) */
+
+	/* Send BSSGP-DL-UNITDATA.req */
+	return gprs_bssgp_tx_dl_ud(msg, mmctx);
+}
+
+static void gprs_llc_hdr_dump(struct gprs_llc_hdr_parsed *gph)
+{
+	DEBUGP(DLLC, "LLC SAPI=%u %c %c FCS=0x%06x",
+		gph->sapi, gph->is_cmd ? 'C' : 'R', gph->ack_req ? 'A' : ' ',
+		gph->fcs);
+
+	if (gph->cmd)
+		DEBUGPC(DLLC, "CMD=%s ", get_value_string(llc_cmd_strs, gph->cmd));
+
+	if (gph->data)
+		DEBUGPC(DLLC, "DATA ");
+
+	DEBUGPC(DLLC, "\n");
+}
+static int gprs_llc_hdr_rx(struct gprs_llc_hdr_parsed *gph,
+			   struct gprs_llc_lle *lle)
+{
+	switch (gph->cmd) {
+	case GPRS_LLC_SABM: /* Section 6.4.1.1 */
+		lle->v_sent = lle->v_ack = lle->v_recv = 0;
+		if (lle->state == GPRS_LLES_ASSIGNED_ADM) {
+			/* start re-establishment (8.7.1) */
+		}
+		lle->state = GPRS_LLES_REMOTE_EST;
+		/* FIXME: Send UA */
+		lle->state = GPRS_LLES_ABM;
+		/* FIXME: process data */
+		break;
+	case GPRS_LLC_DISC: /* Section 6.4.1.2 */
+		/* FIXME: Send UA */
+		/* terminate ABM */
+		lle->state = GPRS_LLES_ASSIGNED_ADM;
+		break;
+	case GPRS_LLC_UA: /* Section 6.4.1.3 */
+		if (lle->state == GPRS_LLES_LOCAL_EST)
+			lle->state = GPRS_LLES_ABM;
+		break;
+	case GPRS_LLC_DM: /* Section 6.4.1.4: ABM cannot be performed */
+		if (lle->state == GPRS_LLES_LOCAL_EST)
+			lle->state = GPRS_LLES_ASSIGNED_ADM;
+		break;
+	case GPRS_LLC_FRMR: /* Section 6.4.1.5 */
+		break;
+	case GPRS_LLC_XID: /* Section 6.4.1.6 */
+		/* FIXME: implement XID negotiation using SNDCP */
+		{
+			struct msgb *resp;
+			uint8_t *xid;
+			resp = msgb_alloc_headroom(4096, 1024, "LLC_XID");
+			xid = msgb_put(resp, gph->data_len);
+			memcpy(xid, gph->data, gph->data_len);
+			gprs_llc_tx_xid(lle, resp);
+		}
+		break;
+	case GPRS_LLC_UI:
+		if (gph->seq_tx < lle->vu_recv) {
+			LOGP(DLLC, LOGL_NOTICE, "TLLI=%08x dropping UI, vurecv %u <= %u\n",
+				lle->llme ? lle->llme->tlli : -1,
+				gph->seq_tx, lle->vu_recv);
+			return -EIO;
+		}
+		/* Increment the sequence number that we expect in the next frame */
+		lle->vu_recv = (gph->seq_tx + 1) % 512;
+		/* Increment Overflow Counter */
+		if ((gph->seq_tx + 1) / 512)
+			lle->oc_ui_recv += 512;
+		break;
+	}
+
+	return 0;
+}
+
+/* parse a GPRS LLC header, also check for invalid frames */
+static int gprs_llc_hdr_parse(struct gprs_llc_hdr_parsed *ghp,
+			      uint8_t *llc_hdr, int len)
+{
+	uint8_t *ctrl = llc_hdr+1;
+	int is_sack = 0;
+
+	if (len <= CRC24_LENGTH)
+		return -EIO;
+
+	ghp->crc_length = len - CRC24_LENGTH;
+
+	ghp->ack_req = 0;
+
+	/* Section 5.5: FCS */
+	ghp->fcs = *(llc_hdr + len - 3);
+	ghp->fcs |= *(llc_hdr + len - 2) << 8;
+	ghp->fcs |= *(llc_hdr + len - 1) << 16;
+
+	/* Section 6.2.1: invalid PD field */
+	if (llc_hdr[0] & 0x80)
+		return -EIO;
+
+	/* This only works for the MS->SGSN direction */
+	if (llc_hdr[0] & 0x40)
+		ghp->is_cmd = 0;
+	else
+		ghp->is_cmd = 1;
+
+	ghp->sapi = llc_hdr[0] & 0xf;
+
+	/* Section 6.2.3: check for reserved SAPI */
+	switch (ghp->sapi) {
+	case 0:
+	case 4:
+	case 6:
+	case 0xa:
+	case 0xc:
+	case 0xd:
+	case 0xf:
+		return -EINVAL;
+	}
+
+	if ((ctrl[0] & 0x80) == 0) {
+		/* I (Information transfer + Supervisory) format */
+		uint8_t k;
+
+		ghp->data = ctrl + 3;
+
+		if (ctrl[0] & 0x40)
+			ghp->ack_req = 1;
+
+		ghp->seq_tx  = (ctrl[0] & 0x1f) << 4;
+		ghp->seq_tx |= (ctrl[1] >> 4);
+
+		ghp->seq_rx  = (ctrl[1] & 0x7) << 6;
+		ghp->seq_rx |= (ctrl[2] >> 2);
+
+		switch (ctrl[2] & 0x03) {
+		case 0:
+			ghp->cmd = GPRS_LLC_RR;
+			break;
+		case 1:
+			ghp->cmd = GPRS_LLC_ACK;
+			break;
+		case 2:
+			ghp->cmd = GPRS_LLC_RNR;
+			break;
+		case 3:
+			ghp->cmd = GPRS_LLC_SACK;
+			k = ctrl[3] & 0x1f;
+			ghp->data += 1 + k;
+			break;
+		}
+		ghp->data_len = (llc_hdr + len - 3) - ghp->data;
+	} else if ((ctrl[0] & 0xc0) == 0x80) {
+		/* S (Supervisory) format */
+		ghp->data = NULL;
+		ghp->data_len = 0;
+
+		if (ctrl[0] & 0x20)
+			ghp->ack_req = 1;
+		ghp->seq_rx  = (ctrl[0] & 0x7) << 6;
+		ghp->seq_rx |= (ctrl[1] >> 2);
+
+		switch (ctrl[1] & 0x03) {
+		case 0:
+			ghp->cmd = GPRS_LLC_RR;
+			break;
+		case 1:
+			ghp->cmd = GPRS_LLC_ACK;
+			break;
+		case 2:
+			ghp->cmd = GPRS_LLC_RNR;
+			break;
+		case 3:
+			ghp->cmd = GPRS_LLC_SACK;
+			break;
+		}
+	} else if ((ctrl[0] & 0xe0) == 0xc0) {
+		/* UI (Unconfirmed Inforamtion) format */
+		ghp->cmd = GPRS_LLC_UI;
+		ghp->data = ctrl + 2;
+		ghp->data_len = (llc_hdr + len - 3) - ghp->data;
+
+		ghp->seq_tx  = (ctrl[0] & 0x7) << 6;
+		ghp->seq_tx |= (ctrl[1] >> 2);
+		if (ctrl[1] & 0x02) {
+			ghp->is_encrypted = 1;
+			/* FIXME: encryption */
+		}
+		if (ctrl[1] & 0x01) {
+			/* FCS over hdr + all inf fields */
+		} else {
+			/* FCS over hdr + N202 octets (4) */
+			if (ghp->crc_length > UI_HDR_LEN + N202)
+				ghp->crc_length = UI_HDR_LEN + N202;
+		}
+	} else {
+		/* U (Unnumbered) format: 1 1 1 P/F M4 M3 M2 M1 */
+		ghp->data = NULL;
+		ghp->data_len = 0;
+
+		switch (ctrl[0] & 0xf) {
+		case GPRS_LLC_U_NULL_CMD:
+			ghp->cmd = GPRS_LLC_NULL;
+			break;
+		case GPRS_LLC_U_DM_RESP:
+			ghp->cmd = GPRS_LLC_DM;
+			break;
+		case GPRS_LLC_U_DISC_CMD:
+			ghp->cmd = GPRS_LLC_DISC;
+			break;
+		case GPRS_LLC_U_UA_RESP:
+			ghp->cmd = GPRS_LLC_UA;
+			break;
+		case GPRS_LLC_U_SABM_CMD:
+			ghp->cmd = GPRS_LLC_SABM;
+			break;
+		case GPRS_LLC_U_FRMR_RESP:
+			ghp->cmd = GPRS_LLC_FRMR;
+			break;
+		case GPRS_LLC_U_XID:
+			ghp->cmd = GPRS_LLC_XID;
+			ghp->data = ctrl + 1;
+			ghp->data_len = (llc_hdr + len - 3) - ghp->data;
+			break;
+		default:
+			return -EIO;
+		}
+	}
+
+	/* FIXME: parse sack frame */
+	if (ghp->cmd == GPRS_LLC_SACK) {
+		LOGP(DLLC, LOGL_NOTICE, "Unsupported SACK frame\n");
+		return -EIO;
+	}
+
+	return 0;
+}
+
+/* receive an incoming LLC PDU (BSSGP-UL-UNITDATA-IND, 7.2.4.2) */
+int gprs_llc_rcvmsg(struct msgb *msg, struct tlv_parsed *tv)
+{
+	struct bssgp_ud_hdr *udh = (struct bssgp_ud_hdr *) msgb_bssgph(msg);
+	struct gprs_llc_hdr *lh = msgb_llch(msg);
+	struct gprs_llc_hdr_parsed llhp;
+	struct gprs_llc_lle *lle;
+	int rc = 0;
+
+	/* Identifiers from DOWN: NSEI, BVCI, TLLI */
+
+	memset(&llhp, 0, sizeof(llhp));
+	rc = gprs_llc_hdr_parse(&llhp, (uint8_t *) lh, TLVP_LEN(tv, BSSGP_IE_LLC_PDU));
+	gprs_llc_hdr_dump(&llhp);
+	if (rc < 0) {
+		LOGP(DLLC, LOGL_NOTICE, "Error during LLC header parsing\n");
+		return rc;
+	}
+
+	switch (gprs_tlli_type(msgb_tlli(msg))) {
+	case TLLI_LOCAL:
+	case TLLI_FOREIGN:
+	case TLLI_RANDOM:
+	case TLLI_AUXILIARY:
+		break;
+	default:
+		LOGP(DLLC, LOGL_ERROR,
+			"Discarding frame with strange TLLI type\n");
+		break;
+	}
+
+	/* find the LLC Entity for this TLLI+SAPI tuple */
+	lle = lle_by_tlli_sapi(msgb_tlli(msg), llhp.sapi);
+
+	/* 7.2.1.1 LLC belonging to unassigned TLLI+SAPI shall be discarded,
+	 * except UID and XID frames with SAPI=1 */
+	if (!lle) {
+		if (llhp.sapi == GPRS_SAPI_GMM &&
+		    (llhp.cmd == GPRS_LLC_XID || llhp.cmd == GPRS_LLC_UI)) {
+			struct gprs_llc_llme *llme;
+			/* FIXME: don't use the TLLI but the 0xFFFF unassigned? */
+			llme = llme_alloc(msgb_tlli(msg));
+			LOGP(DLLC, LOGL_DEBUG, "LLC RX: unknown TLLI 0x08x, "
+				"creating LLME on the fly\n", msgb_tlli(msg));
+			lle = &llme->lle[llhp.sapi];
+		} else {
+			LOGP(DLLC, LOGL_NOTICE,
+				"unknown TLLI/SAPI: Silently dropping\n");
+			return 0;
+		}
+	}
+
+	/* decrypt information field + FCS, if needed! */
+	if (llhp.is_encrypted) {
+		uint32_t iov_ui = 0; /* FIXME: randomly select for TLLI */
+		uint16_t crypt_len = llhp.data_len + 3;
+		uint8_t cipher_out[GSM0464_CIPH_MAX_BLOCK];
+		uint32_t iv;
+		uint64_t kc = *(uint64_t *)&lle->llme->kc;
+		int rc, i;
+
+		if (lle->llme->algo == GPRS_ALGO_GEA0) {
+			LOGP(DLLC, LOGL_NOTICE, "encrypted frame for LLC that "
+				"has no KC/Algo! Dropping.\n");
+			return 0;
+		}
+
+		iv = gprs_cipher_gen_input_ui(iov_ui, lle->sapi, llhp.seq_tx,
+						lle->oc_ui_recv);
+		rc = gprs_cipher_run(cipher_out, crypt_len, lle->llme->algo,
+				     kc, iv, GPRS_CIPH_MS2SGSN);
+		if (rc < 0) {
+			LOGP(DLLC, LOGL_ERROR, "Error decrypting frame: %d\n",
+			     rc);
+			return rc;
+		}
+
+		/* XOR the cipher output with the information field + FCS */
+		for (i = 0; i < crypt_len; i++)
+			*(llhp.data + i) ^= cipher_out[i];
+	} else {
+		if (lle->llme->algo != GPRS_ALGO_GEA0) {
+			LOGP(DLLC, LOGL_NOTICE, "unencrypted frame for LLC "
+				"that is supposed to be encrypted. Dropping.\n");
+			return 0;
+		}
+	}
+
+	/* We have to do the FCS check _after_ decryption */
+	llhp.fcs_calc = gprs_llc_fcs((uint8_t *)lh, llhp.crc_length);
+	if (llhp.fcs != llhp.fcs_calc) {
+		LOGP(DLLC, LOGL_INFO, "Dropping frame with invalid FCS\n");
+		return -EIO;
+	}
+
+	/* Update LLE's (BVCI, NSEI) tuple */
+	lle->llme->bvci = msgb_bvci(msg);
+	lle->llme->nsei = msgb_nsei(msg);
+
+	/* Receive and Process the actual LLC frame */
+	rc = gprs_llc_hdr_rx(&llhp, lle);
+	if (rc < 0)
+		return rc;
+
+	/* llhp.data is only set when we need to send LL_[UNIT]DATA_IND up */
+	if (llhp.data) {
+		msgb_gmmh(msg) = llhp.data;
+		switch (llhp.sapi) {
+		case GPRS_SAPI_GMM:
+			/* send LL_UNITDATA_IND to GMM */
+			rc = gsm0408_gprs_rcvmsg(msg, lle->llme);
+			break;
+		case GPRS_SAPI_SNDCP3:
+		case GPRS_SAPI_SNDCP5:
+		case GPRS_SAPI_SNDCP9:
+		case GPRS_SAPI_SNDCP11:
+			/* send LL_DATA_IND/LL_UNITDATA_IND to SNDCP */
+			rc = sndcp_llunitdata_ind(msg, lle, llhp.data, llhp.data_len);
+			break;
+		case GPRS_SAPI_SMS:
+			/* FIXME */
+		case GPRS_SAPI_TOM2:
+		case GPRS_SAPI_TOM8:
+			/* FIXME: send LL_DATA_IND/LL_UNITDATA_IND to TOM */
+		default:
+			LOGP(DLLC, LOGL_NOTICE, "Unsupported SAPI %u\n", llhp.sapi);
+			rc = -EINVAL;
+			break;
+		}
+	}
+
+	return rc;
+}
+
+/* 04.64 Chapter 7.2.1.1 LLGMM-ASSIGN */
+int gprs_llgmm_assign(struct gprs_llc_llme *llme,
+		      uint32_t old_tlli, uint32_t new_tlli,
+		      enum gprs_ciph_algo alg, const uint8_t *kc)
+{
+	unsigned int i;
+
+	/* Update the crypto parameters */
+	llme->algo = alg;
+	if (alg != GPRS_ALGO_GEA0)
+		memcpy(llme->kc, kc, sizeof(llme->kc));
+
+	if (old_tlli == 0xffffffff && new_tlli != 0xffffffff) {
+		/* TLLI Assignment 8.3.1 */
+		/* New TLLI shall be assigned and used when (re)transmitting LLC frames */
+		/* If old TLLI != 0xffffffff was assigned to LLME, then TLLI
+		 * old is unassigned.  Only TLLI new shall be accepted when
+		 * received from peer. */
+		if (llme->old_tlli != 0xffffffff) {
+			llme->old_tlli = 0xffffffff;
+			llme->tlli = new_tlli;
+		} else {
+			/* If TLLI old == 0xffffffff was assigned to LLME, then this is
+			 * TLLI assignmemt according to 8.3.1 */
+			llme->old_tlli = 0xffffffff;
+			llme->tlli = new_tlli;
+			llme->state = GPRS_LLMS_ASSIGNED;
+			/* 8.5.3.1 For all LLE's */
+			for (i = 0; i < ARRAY_SIZE(llme->lle); i++) {
+				struct gprs_llc_lle *l = &llme->lle[i];
+				l->vu_send = l->vu_recv = 0;
+				l->retrans_ctr = 0;
+				l->state = GPRS_LLES_ASSIGNED_ADM;
+				/* FIXME Set parameters according to table 9 */
+			}
+		}
+	} else if (old_tlli != 0xffffffff && new_tlli != 0xffffffff) {
+		/* TLLI Change 8.3.2 */
+		/* Both TLLI Old and TLLI New are assigned; use New when
+		 * (re)transmitting.  Accept toth Old and New on Rx */
+		llme->old_tlli = llme->tlli;
+		llme->tlli = new_tlli;
+		llme->state = GPRS_LLMS_ASSIGNED;
+	} else if (old_tlli != 0xffffffff && new_tlli == 0xffffffff) {
+		/* TLLI Unassignment 8.3.3) */
+		llme->tlli = llme->old_tlli = 0;
+		llme->state = GPRS_LLMS_UNASSIGNED;
+		for (i = 0; i < ARRAY_SIZE(llme->lle); i++) {
+			struct gprs_llc_lle *l = &llme->lle[i];
+			l->state = GPRS_LLES_UNASSIGNED;
+		}
+		llme_free(llme);
+	} else
+		return -EINVAL;
+
+	return 0;
+}
+
+int gprs_llc_init(const char *cipher_plugin_path)
+{
+	return gprs_cipher_load(cipher_plugin_path);
+}
diff --git a/src/gprs/gprs_llc_vty.c b/src/gprs/gprs_llc_vty.c
new file mode 100644
index 000000000..d4f743b01
--- /dev/null
+++ b/src/gprs/gprs_llc_vty.c
@@ -0,0 +1,108 @@
+/* VTY interface for our GPRS LLC implementation */
+
+/* (C) 2010 by Harald Welte <laforge@gnumonks.org>
+ *
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <stdlib.h>
+#include <unistd.h>
+#include <errno.h>
+#include <stdint.h>
+
+#include <arpa/inet.h>
+
+#include <openbsc/gsm_data.h>
+#include <osmocore/msgb.h>
+#include <osmocore/tlv.h>
+#include <osmocore/talloc.h>
+#include <osmocore/select.h>
+#include <osmocore/rate_ctr.h>
+#include <openbsc/debug.h>
+#include <openbsc/signal.h>
+#include <openbsc/gprs_llc.h>
+
+#include <osmocom/vty/vty.h>
+#include <osmocom/vty/command.h>
+
+struct value_string gprs_llc_state_strs[] = {
+	{ GPRS_LLES_UNASSIGNED, 	"TLLI Unassigned" },
+	{ GPRS_LLES_ASSIGNED_ADM,	"TLLI Assigned" },
+	{ GPRS_LLES_LOCAL_EST,		"Local Establishment" },
+	{ GPRS_LLES_REMOTE_EST,		"Remote Establishment" },
+	{ GPRS_LLES_ABM,		"Asynchronous Balanced Mode" },
+	{ GPRS_LLES_LOCAL_REL,		"Local Release" },
+	{ GPRS_LLES_TIMER_REC,		"Timer Recovery" },
+};
+
+static void vty_dump_lle(struct vty *vty, struct gprs_llc_lle *lle)
+{
+	struct gprs_llc_params *par = &lle->params;
+	vty_out(vty, " SAPI %2u State %s VUsend=%u, VUrecv=%u", lle->sapi, 
+		get_value_string(gprs_llc_state_strs, lle->state),
+		lle->vu_send, lle->vu_recv);
+	vty_out(vty, " Vsent=%u Vack=%u Vrecv=%u, RetransCtr=%u%s",
+		lle->v_sent, lle->v_ack, lle->v_recv,
+		lle->retrans_ctr, VTY_NEWLINE);
+	vty_out(vty, "  T200=%u, N200=%u, N201-U=%u, N201-I=%u, mD=%u, "
+		"mU=%u, kD=%u, kU=%u%s", par->t200_201, par->n200,
+		par->n201_u, par->n201_i, par->mD, par->mU, par->kD,
+		par->kU, VTY_NEWLINE);
+}
+
+static uint8_t valid_sapis[] = { 1, 2, 3, 5, 7, 8, 9, 11 };
+
+static void vty_dump_llme(struct vty *vty, struct gprs_llc_llme *llme)
+{
+	unsigned int i;
+
+	vty_out(vty, "TLLI %08x (Old TLLI %08x) BVCI=%u NSEI=%u: State %s%s",
+		llme->tlli, llme->old_tlli, llme->bvci, llme->nsei,
+		get_value_string(gprs_llc_state_strs, llme->state), VTY_NEWLINE);
+
+	for (i = 0; i < ARRAY_SIZE(valid_sapis); i++) {
+		struct gprs_llc_lle *lle;
+		uint8_t sapi = valid_sapis[i];
+
+		if (sapi >= ARRAY_SIZE(llme->lle))
+			continue;
+
+		lle = &llme->lle[sapi];
+		vty_dump_lle(vty, lle);
+	}
+}
+
+
+DEFUN(show_llc, show_llc_cmd,
+	"show llc",
+	SHOW_STR "Display information about the LLC protocol")
+{
+	struct gprs_llc_llme *llme;
+
+	vty_out(vty, "State of LLC Entities%s", VTY_NEWLINE);
+	llist_for_each_entry(llme, &gprs_llc_llmes, list) {
+		vty_dump_llme(vty, llme);
+	}
+	return CMD_SUCCESS;
+}
+
+int gprs_llc_vty_init(void)
+{
+	install_element_ve(&show_llc_cmd);
+
+	return 0;
+}
diff --git a/src/gprs/gprs_sgsn.c b/src/gprs/gprs_sgsn.c
new file mode 100644
index 000000000..443655418
--- /dev/null
+++ b/src/gprs/gprs_sgsn.c
@@ -0,0 +1,383 @@
+/* GPRS SGSN functionality */
+
+/* (C) 2009 by Harald Welte <laforge@gnumonks.org>
+ *
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <stdint.h>
+
+#include <osmocore/linuxlist.h>
+#include <osmocore/talloc.h>
+#include <osmocore/timer.h>
+#include <osmocore/rate_ctr.h>
+#include <openbsc/gsm_subscriber.h>
+#include <openbsc/debug.h>
+#include <openbsc/gprs_sgsn.h>
+#include <openbsc/gprs_ns.h>
+#include <openbsc/gprs_bssgp.h>
+#include <openbsc/sgsn.h>
+#include <openbsc/gsm_04_08_gprs.h>
+#include <openbsc/gprs_gmm.h>
+
+extern struct sgsn_instance *sgsn;
+
+LLIST_HEAD(sgsn_mm_ctxts);
+LLIST_HEAD(sgsn_ggsn_ctxts);
+LLIST_HEAD(sgsn_apn_ctxts);
+LLIST_HEAD(sgsn_pdp_ctxts);
+
+static const struct rate_ctr_desc mmctx_ctr_description[] = {
+	{ "sign.packets.in",	"Signalling Messages ( In)" },
+	{ "sign.packets.out",	"Signalling Messages (Out)" },
+	{ "udata.packets.in",	"User Data  Messages ( In)" },
+	{ "udata.packets.out",	"User Data  Messages (Out)" },
+	{ "udata.bytes.in",	"User Data  Bytes    ( In)" },
+	{ "udata.bytes.out",	"User Data  Bytes    (Out)" },
+	{ "pdp_ctx_act",	"PDP Context Activations  " },
+	{ "suspend",		"SUSPEND Count            " },
+	{ "paging.ps",		"Paging Packet Switched   " },
+	{ "paging.cs",		"Paging Circuit Switched  " },
+	{ "ra_update",		"Routing Area Update      " },
+};
+
+static const struct rate_ctr_group_desc mmctx_ctrg_desc = {
+	.group_name_prefix = "sgsn.mmctx",
+	.group_description = "SGSN MM Context Statistics",
+	.num_ctr = ARRAY_SIZE(mmctx_ctr_description),
+	.ctr_desc = mmctx_ctr_description,
+};
+
+static const struct rate_ctr_desc pdpctx_ctr_description[] = {
+	{ "udata.packets.in",	"User Data  Messages ( In)" },
+	{ "udata.packets.out",	"User Data  Messages (Out)" },
+	{ "udata.bytes.in",	"User Data  Bytes    ( In)" },
+	{ "udata.bytes.out",	"User Data  Bytes    (Out)" },
+};
+
+static const struct rate_ctr_group_desc pdpctx_ctrg_desc = {
+	.group_name_prefix = "sgsn.pdpctx",
+	.group_description = "SGSN PDP Context Statistics",
+	.num_ctr = ARRAY_SIZE(pdpctx_ctr_description),
+	.ctr_desc = pdpctx_ctr_description,
+};
+
+static int ra_id_equals(const struct gprs_ra_id *id1,
+			const struct gprs_ra_id *id2)
+{
+	return (id1->mcc == id2->mcc && id1->mnc == id2->mnc &&
+		id1->lac == id2->lac && id1->rac == id2->rac);
+}
+
+/* See 03.02 Chapter 2.6 */
+static inline uint32_t tlli_foreign(uint32_t tlli)
+{
+	return ((tlli | 0x80000000) & ~0x40000000);	
+}
+
+/* look-up a SGSN MM context based on TLLI + RAI */
+struct sgsn_mm_ctx *sgsn_mm_ctx_by_tlli(uint32_t tlli,
+					const struct gprs_ra_id *raid)
+{
+	struct sgsn_mm_ctx *ctx;
+	int tlli_type;
+
+	llist_for_each_entry(ctx, &sgsn_mm_ctxts, list) {
+		if (tlli == ctx->tlli &&
+		    ra_id_equals(raid, &ctx->ra))
+			return ctx;
+	}
+
+	tlli_type = gprs_tlli_type(tlli);
+	switch (tlli_type) {
+	case TLLI_LOCAL:
+		llist_for_each_entry(ctx, &sgsn_mm_ctxts, list) {
+			if ((ctx->p_tmsi | 0xC0000000) == tlli ||
+			     (ctx->p_tmsi_old && (ctx->p_tmsi_old | 0xC0000000) == tlli)) {
+				ctx->tlli = tlli;
+				return ctx;
+			}
+		}
+		break;
+	case TLLI_FOREIGN:
+		llist_for_each_entry(ctx, &sgsn_mm_ctxts, list) {
+			if (tlli == tlli_foreign(ctx->tlli) &&
+			    ra_id_equals(raid, &ctx->ra))
+				return ctx;
+		}
+		break;
+	default:
+		break;
+	}
+
+	return NULL;
+}
+
+struct sgsn_mm_ctx *sgsn_mm_ctx_by_ptmsi(uint32_t p_tmsi)
+{
+	struct sgsn_mm_ctx *ctx;
+
+	llist_for_each_entry(ctx, &sgsn_mm_ctxts, list) {
+		if (p_tmsi == ctx->p_tmsi ||
+		    (ctx->p_tmsi_old && ctx->p_tmsi_old == p_tmsi))
+			return ctx;
+	}
+	return NULL;
+}
+
+struct sgsn_mm_ctx *sgsn_mm_ctx_by_imsi(const char *imsi)
+{
+	struct sgsn_mm_ctx *ctx;
+
+	llist_for_each_entry(ctx, &sgsn_mm_ctxts, list) {
+		if (!strcmp(imsi, ctx->imsi))
+			return ctx;
+	}
+	return NULL;
+
+}
+
+/* Allocate a new SGSN MM context */
+struct sgsn_mm_ctx *sgsn_mm_ctx_alloc(uint32_t tlli,
+					const struct gprs_ra_id *raid)
+{
+	struct sgsn_mm_ctx *ctx;
+
+	ctx = talloc_zero(tall_bsc_ctx, struct sgsn_mm_ctx);
+	if (!ctx)
+		return NULL;
+
+	memcpy(&ctx->ra, raid, sizeof(ctx->ra));
+	ctx->tlli = tlli;
+	ctx->mm_state = GMM_DEREGISTERED;
+	ctx->ctrg = rate_ctr_group_alloc(ctx, &mmctx_ctrg_desc, tlli);
+	INIT_LLIST_HEAD(&ctx->pdp_list);
+
+	llist_add(&ctx->list, &sgsn_mm_ctxts);
+
+	return ctx;
+}
+
+void sgsn_mm_ctx_free(struct sgsn_mm_ctx *mm)
+{
+	struct sgsn_pdp_ctx *pdp, *pdp2;
+
+	/* Unlink from global list of MM contexts */
+	llist_del(&mm->list);
+
+	/* Free all PDP contexts */
+	llist_for_each_entry_safe(pdp, pdp2, &mm->pdp_list, list)
+		sgsn_pdp_ctx_free(pdp);
+	
+	rate_ctr_group_free(mm->ctrg);
+
+	talloc_free(mm);
+}
+
+/* look up PDP context by MM context and NSAPI */
+struct sgsn_pdp_ctx *sgsn_pdp_ctx_by_nsapi(const struct sgsn_mm_ctx *mm,
+					   uint8_t nsapi)
+{
+	struct sgsn_pdp_ctx *pdp;
+
+	llist_for_each_entry(pdp, &mm->pdp_list, list) {
+		if (pdp->nsapi == nsapi)
+			return pdp;
+	}
+	return NULL;
+}
+
+/* look up PDP context by MM context and transaction ID */
+struct sgsn_pdp_ctx *sgsn_pdp_ctx_by_tid(const struct sgsn_mm_ctx *mm,
+					 uint8_t tid)
+{
+	struct sgsn_pdp_ctx *pdp;
+
+	llist_for_each_entry(pdp, &mm->pdp_list, list) {
+		if (pdp->ti == tid)
+			return pdp;
+	}
+	return NULL;
+}
+
+struct sgsn_pdp_ctx *sgsn_pdp_ctx_alloc(struct sgsn_mm_ctx *mm,
+					uint8_t nsapi)
+{
+	struct sgsn_pdp_ctx *pdp;
+
+	pdp = sgsn_pdp_ctx_by_nsapi(mm, nsapi);
+	if (pdp)
+		return NULL;
+
+	pdp = talloc_zero(tall_bsc_ctx, struct sgsn_pdp_ctx);
+	if (!pdp)
+		return NULL;
+
+	pdp->mm = mm;
+	pdp->nsapi = nsapi;
+	pdp->ctrg = rate_ctr_group_alloc(pdp, &pdpctx_ctrg_desc, nsapi);
+	llist_add(&pdp->list, &mm->pdp_list);
+	llist_add(&pdp->g_list, &sgsn_pdp_ctxts);
+
+	return pdp;
+}
+
+void sgsn_pdp_ctx_free(struct sgsn_pdp_ctx *pdp)
+{
+	rate_ctr_group_free(pdp->ctrg);
+	llist_del(&pdp->list);
+	llist_del(&pdp->g_list);
+	talloc_free(pdp);
+}
+
+/* GGSN contexts */
+
+struct sgsn_ggsn_ctx *sgsn_ggsn_ctx_alloc(uint32_t id)
+{
+	struct sgsn_ggsn_ctx *ggc;
+
+	ggc = talloc_zero(tall_bsc_ctx, struct sgsn_ggsn_ctx);
+	if (!ggc)
+		return NULL;
+
+	ggc->id = id;
+	ggc->gtp_version = 1;
+	ggc->remote_restart_ctr = -1;
+	/* if we are called from config file parse, this gsn doesn't exist yet */
+	ggc->gsn = sgsn->gsn;
+	llist_add(&ggc->list, &sgsn_ggsn_ctxts);
+
+	return ggc;
+}
+
+struct sgsn_ggsn_ctx *sgsn_ggsn_ctx_by_id(uint32_t id)
+{
+	struct sgsn_ggsn_ctx *ggc;
+
+	llist_for_each_entry(ggc, &sgsn_ggsn_ctxts, list) {
+		if (id == ggc->id)
+			return ggc;
+	}
+	return NULL;
+}
+
+struct sgsn_ggsn_ctx *sgsn_ggsn_ctx_by_addr(struct in_addr *addr)
+{
+	struct sgsn_ggsn_ctx *ggc;
+
+	llist_for_each_entry(ggc, &sgsn_ggsn_ctxts, list) {
+		if (!memcmp(addr, &ggc->remote_addr, sizeof(*addr)))
+			return ggc;
+	}
+	return NULL;
+}
+
+
+struct sgsn_ggsn_ctx *sgsn_ggsn_ctx_find_alloc(uint32_t id)
+{
+	struct sgsn_ggsn_ctx *ggc;
+
+	ggc = sgsn_ggsn_ctx_by_id(id);
+	if (!ggc)
+		ggc = sgsn_ggsn_ctx_alloc(id);
+	return ggc;
+}
+
+/* APN contexts */
+
+#if 0
+struct apn_ctx *apn_ctx_alloc(const char *ap_name)
+{
+	struct apn_ctx *actx;
+
+	actx = talloc_zero(talloc_bsc_ctx, struct apn_ctx);
+	if (!actx)
+		return NULL;
+	actx->name = talloc_strdup(actx, ap_name);
+
+	return actx;
+}
+
+struct apn_ctx *apn_ctx_by_name(const char *name)
+{
+	struct apn_ctx *actx;
+
+	llist_for_each_entry(actx, &sgsn_apn_ctxts, list) {
+		if (!strcmp(name, actx->name))
+			return actx;
+	}
+	return NULL;
+}
+
+struct apn_ctx *apn_ctx_find_alloc(const char *name)
+{
+	struct apn_ctx *actx;
+
+	actx = apn_ctx_by_name(name);
+	if (!actx)
+		actx = apn_ctx_alloc(name);
+
+	return actx;
+}
+#endif
+
+uint32_t sgsn_alloc_ptmsi(void)
+{
+	struct sgsn_mm_ctx *mm;
+	uint32_t ptmsi;
+
+restart:
+	ptmsi = rand();
+	llist_for_each_entry(mm, &sgsn_mm_ctxts, list) {
+		if (mm->p_tmsi == ptmsi)
+			goto restart;
+	}
+
+	return ptmsi;
+}
+
+static void drop_one_pdp(struct sgsn_pdp_ctx *pdp)
+{
+	if (pdp->mm->mm_state == GMM_REGISTERED_NORMAL)
+		gsm48_tx_gsm_deact_pdp_req(pdp, GSM_CAUSE_NET_FAIL);
+	else  {
+		/* FIXME: GPRS paging in case MS is SUSPENDED */
+		LOGP(DGPRS, LOGL_NOTICE, "Hard-dropping PDP ctx due to GGSN "
+			"recovery\n");
+		sgsn_pdp_ctx_free(pdp);
+	}
+}
+
+/* High-level function to be called in case a GGSN has disappeared or
+ * ottherwise lost state (recovery procedure) */
+int drop_all_pdp_for_ggsn(struct sgsn_ggsn_ctx *ggsn)
+{
+	struct sgsn_mm_ctx *mm;
+	int num = 0;
+
+	llist_for_each_entry(mm, &sgsn_mm_ctxts, list) {
+		struct sgsn_pdp_ctx *pdp;
+		llist_for_each_entry(pdp, &mm->pdp_list, list) {
+			if (pdp->ggsn == ggsn) {
+				drop_one_pdp(pdp);
+				num++;
+			}
+		}
+	}
+
+	return num;
+}
diff --git a/src/gprs/gprs_sndcp.c b/src/gprs/gprs_sndcp.c
new file mode 100644
index 000000000..4f421e451
--- /dev/null
+++ b/src/gprs/gprs_sndcp.c
@@ -0,0 +1,616 @@
+/* GPRS SNDCP protocol implementation as per 3GPP TS 04.65 */
+
+/* (C) 2010 by Harald Welte <laforge@gnumonks.org>
+ * (C) 2010 by On-Waves
+ *
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <errno.h>
+#include <stdint.h>
+
+#include <osmocore/msgb.h>
+#include <osmocore/linuxlist.h>
+#include <osmocore/timer.h>
+#include <osmocore/talloc.h>
+
+#include <openbsc/gsm_data.h>
+#include <openbsc/debug.h>
+#include <openbsc/gprs_bssgp.h>
+#include <openbsc/gprs_llc.h>
+#include <openbsc/sgsn.h>
+
+#include "gprs_sndcp.h"
+
+/* Chapter 7.2: SN-PDU Formats */
+struct sndcp_common_hdr {
+	/* octet 1 */
+	uint8_t nsapi:4;
+	uint8_t more:1;
+	uint8_t type:1;
+	uint8_t first:1;
+	uint8_t spare:1;
+} __attribute__((packed));
+
+/* PCOMP / DCOMP only exist in first fragment */
+struct sndcp_comp_hdr {
+	/* octet 2 */
+	uint8_t pcomp:4;
+	uint8_t dcomp:4;
+} __attribute__((packed));
+
+struct sndcp_udata_hdr {
+	/* octet 3 */
+	uint8_t npdu_high:4;
+	uint8_t seg_nr:4;
+	/* octet 4 */
+	uint8_t npdu_low;
+} __attribute__((packed));
+
+
+static void *tall_sndcp_ctx;
+
+/* A fragment queue entry, containing one framgent of a N-PDU */
+struct defrag_queue_entry {
+	struct llist_head list;
+	/* segment number of this fragment */
+	uint32_t seg_nr;
+	/* length of the data area of this fragment */
+	uint32_t data_len;
+	/* pointer to the data of this fragment */
+	uint8_t *data;
+};
+
+LLIST_HEAD(gprs_sndcp_entities);
+
+/* Enqueue a fragment into the defragment queue */
+static int defrag_enqueue(struct gprs_sndcp_entity *sne, uint8_t seg_nr,
+			  uint8_t *data, uint32_t data_len)
+{
+	struct defrag_queue_entry *dqe;
+
+	dqe = talloc_zero(tall_sndcp_ctx, struct defrag_queue_entry);
+	if (!dqe)
+		return -ENOMEM;
+	dqe->data = talloc_zero_size(dqe, data_len);
+	if (!dqe->data) {
+		talloc_free(dqe);
+		return -ENOMEM;
+	}
+	dqe->seg_nr = seg_nr;
+	dqe->data_len = data_len;
+
+	llist_add(&dqe->list, &sne->defrag.frag_list);
+
+	if (seg_nr > sne->defrag.highest_seg)
+		sne->defrag.highest_seg = seg_nr;
+
+	sne->defrag.seg_have |= (1 << seg_nr);
+	sne->defrag.tot_len += data_len;
+
+	memcpy(dqe->data, data, data_len);
+
+	return 0;
+}
+
+/* return if we have all segments of this N-PDU */
+static int defrag_have_all_segments(struct gprs_sndcp_entity *sne)
+{
+	uint32_t seg_needed = 0;
+	unsigned int i;
+
+	/* create a bitmask of needed segments */
+	for (i = 0; i <= sne->defrag.highest_seg; i++)
+		seg_needed |= (1 << i);
+
+	if (seg_needed == sne->defrag.seg_have)
+		return 1;
+
+	return 0;
+}
+
+static struct defrag_queue_entry *defrag_get_seg(struct gprs_sndcp_entity *sne,
+						 uint32_t seg_nr)
+{
+	struct defrag_queue_entry *dqe;
+
+	llist_for_each_entry(dqe, &sne->defrag.frag_list, list) {
+		if (dqe->seg_nr == seg_nr) {
+			llist_del(&dqe->list);
+			return dqe;
+		}
+	}
+	return NULL;
+}
+
+/* Perform actual defragmentation and create an output packet */
+static int defrag_segments(struct gprs_sndcp_entity *sne)
+{
+	struct msgb *msg;
+	unsigned int seg_nr;
+	uint8_t *npdu;
+
+	LOGP(DSNDCP, LOGL_DEBUG, "TLLI=0x%08x NSAPI=%u: Defragment output PDU %u "
+		"num_seg=%u tot_len=%u\n", sne->lle->llme->tlli, sne->nsapi,
+		sne->defrag.npdu, sne->defrag.highest_seg, sne->defrag.tot_len);
+	msg = msgb_alloc_headroom(sne->defrag.tot_len+256, 128, "SNDCP Defrag");
+	if (!msg)
+		return -ENOMEM;
+
+	/* FIXME: message headers + identifiers */
+
+	npdu = msg->data;
+
+	for (seg_nr = 0; seg_nr <= sne->defrag.highest_seg; seg_nr++) {
+		struct defrag_queue_entry *dqe;
+		uint8_t *data;
+
+		dqe = defrag_get_seg(sne, seg_nr);
+		if (!dqe) {
+			LOGP(DSNDCP, LOGL_ERROR, "Segment %u missing\n", seg_nr);
+			talloc_free(msg);
+			return -EIO;
+		}
+		/* actually append the segment to the N-PDU */
+		data = msgb_put(msg, dqe->data_len);
+		memcpy(data, dqe->data, dqe->data_len);
+
+		/* release memory for the fragment queue entry */
+		talloc_free(dqe);
+	}
+
+	/* FIXME: cancel timer */
+
+	/* actually send the N-PDU to the SGSN core code, which then
+	 * hands it off to the correct GTP tunnel + GGSN via gtp_data_req() */
+	return sgsn_rx_sndcp_ud_ind(&sne->ra_id, sne->lle->llme->tlli,
+				    sne->nsapi, msg, sne->defrag.tot_len, npdu);
+}
+
+static int defrag_input(struct gprs_sndcp_entity *sne, struct msgb *msg, uint8_t *hdr,
+			unsigned int len)
+{
+	struct sndcp_common_hdr *sch;
+	struct sndcp_comp_hdr *scomph = NULL;
+	struct sndcp_udata_hdr *suh;
+	uint16_t npdu_num;
+	uint8_t *data;
+	int rc;
+
+	sch = (struct sndcp_common_hdr *) hdr;
+	if (sch->first) {
+		scomph = (struct sndcp_comp_hdr *) (hdr + 1);
+		suh = (struct sndcp_udata_hdr *) (hdr + 1 + sizeof(struct sndcp_common_hdr));
+	} else
+		suh = (struct sndcp_udata_hdr *) (hdr + sizeof(struct sndcp_common_hdr));
+
+	data = (uint8_t *)suh + sizeof(struct sndcp_udata_hdr);
+
+	npdu_num = (suh->npdu_high << 8) | suh->npdu_low;
+
+	LOGP(DSNDCP, LOGL_DEBUG, "TLLI=0x%08x NSAPI=%u: Input PDU %u Segment %u "
+		"Length %u %s %s\n", sne->lle->llme->tlli, sne->nsapi, npdu_num,
+		suh->seg_nr, len, sch->first ? "F " : "", sch->more ? "M" : "");
+
+	if (sch->first) {
+		/* first segment of a new packet.  Discard all leftover fragments of
+		 * previous packet */
+		if (!llist_empty(&sne->defrag.frag_list)) {
+			struct defrag_queue_entry *dqe, *dqe2;
+			LOGP(DSNDCP, LOGL_INFO, "TLLI=0x%08x NSAPI=%u: Dropping "
+			     "SN-PDU %u due to insufficient segments (%04x)\n",
+			     sne->lle->llme->tlli, sne->nsapi, sne->defrag.npdu,
+			     sne->defrag.seg_have);
+			llist_for_each_entry_safe(dqe, dqe2, &sne->defrag.frag_list, list) {
+				llist_del(&dqe->list);
+				talloc_free(dqe);
+			}
+		}
+		/* store the currently de-fragmented PDU number */
+		sne->defrag.npdu = npdu_num;
+
+		/* Re-set fragmentation state */
+		sne->defrag.no_more = sne->defrag.highest_seg = sne->defrag.seg_have = 0;
+		sne->defrag.tot_len = 0;
+		/* FIXME: (re)start timer */
+	}
+
+	if (sne->defrag.npdu != npdu_num) {
+		LOGP(DSNDCP, LOGL_INFO, "Segment for different SN-PDU "
+			"(%u != %u)\n", npdu_num, sne->defrag.npdu);
+		/* FIXME */
+	}
+
+	/* FIXME: check if seg_nr already exists */
+	/* make sure to subtract length of SNDCP header from 'len' */
+	rc = defrag_enqueue(sne, suh->seg_nr, data, len - (data - hdr));
+	if (rc < 0)
+		return rc;
+
+	if (!sch->more) {
+		/* this is suppsed to be the last segment of the N-PDU, but it
+		 * might well be not the last to arrive */
+		sne->defrag.no_more = 1;
+	}
+
+	if (sne->defrag.no_more) {
+		/* we have already received the last segment before, let's check
+		 * if all the previous segments exist */
+		if (defrag_have_all_segments(sne))
+			return defrag_segments(sne);
+	}
+
+	return 0;
+}
+
+static struct gprs_sndcp_entity *gprs_sndcp_entity_by_lle(const struct gprs_llc_lle *lle,
+						uint8_t nsapi)
+{
+	struct gprs_sndcp_entity *sne;
+
+	llist_for_each_entry(sne, &gprs_sndcp_entities, list) {
+		if (sne->lle == lle && sne->nsapi == nsapi)
+			return sne;
+	}
+	return NULL;
+}
+
+static struct gprs_sndcp_entity *gprs_sndcp_entity_alloc(struct gprs_llc_lle *lle,
+						uint8_t nsapi)
+{
+	struct gprs_sndcp_entity *sne;
+
+	sne = talloc_zero(tall_sndcp_ctx, struct gprs_sndcp_entity);
+	if (!sne)
+		return NULL;
+
+	sne->lle = lle;
+	sne->nsapi = nsapi;
+	sne->defrag.timer.data = sne;
+	//sne->fqueue.timer.cb = FIXME;
+	sne->rx_state = SNDCP_RX_S_FIRST;
+	INIT_LLIST_HEAD(&sne->defrag.frag_list);
+
+	llist_add(&sne->list, &gprs_sndcp_entities);
+
+	return sne;
+}
+
+/* Entry point for the SNSM-ACTIVATE.indication */
+int sndcp_sm_activate_ind(struct gprs_llc_lle *lle, uint8_t nsapi)
+{
+	LOGP(DSNDCP, LOGL_INFO, "SNSM-ACTIVATE.ind (lle=%p TLLI=%08x, "
+	     "SAPI=%u, NSAPI=%u)\n", lle, lle->llme->tlli, lle->sapi, nsapi);
+
+	if (gprs_sndcp_entity_by_lle(lle, nsapi)) {
+		LOGP(DSNDCP, LOGL_ERROR, "Trying to ACTIVATE "
+			"already-existing entity (TLLI=%08x, NSAPI=%u)\n",
+			lle->llme->tlli, nsapi);
+		return -EEXIST;
+	}
+
+	if (!gprs_sndcp_entity_alloc(lle, nsapi)) {
+		LOGP(DSNDCP, LOGL_ERROR, "Out of memory during ACTIVATE\n");
+		return -ENOMEM;
+	}
+
+	return 0;
+}
+
+/* Entry point for the SNSM-DEACTIVATE.indication */
+int sndcp_sm_deactivate_ind(struct gprs_llc_lle *lle, uint8_t nsapi)
+{
+	struct gprs_sndcp_entity *sne;
+
+	LOGP(DSNDCP, LOGL_INFO, "SNSM-DEACTIVATE.ind (lle=%p, TLLI=%08x, "
+	     "SAPI=%u, NSAPI=%u)\n", lle, lle->llme->tlli, lle->sapi, nsapi);
+
+	sne = gprs_sndcp_entity_by_lle(lle, nsapi);
+	if (!sne) {
+		LOGP(DSNDCP, LOGL_ERROR, "SNSM-DEACTIVATE.ind for non-"
+		     "existing TLLI=%08x SAPI=%u NSAPI=%u\n", lle->llme->tlli,
+		     lle->sapi, nsapi);
+		return -ENOENT;
+	}
+	llist_del(&sne->list);
+	/* frag queue entries are hierarchically allocated, so no need to
+	 * free them explicitly here */
+	talloc_free(sne);
+
+	return 0;
+}
+
+/* Fragmenter state */
+struct sndcp_frag_state {
+	uint8_t frag_nr;
+	struct msgb *msg;	/* original message */
+	uint8_t *next_byte;	/* first byte of next fragment */
+
+	struct gprs_sndcp_entity *sne;
+	void *mmcontext;
+};
+
+/* returns '1' if there are more fragments to send, '0' if none */
+static int sndcp_send_ud_frag(struct sndcp_frag_state *fs)
+{
+	struct gprs_sndcp_entity *sne = fs->sne;
+	struct gprs_llc_lle *lle = sne->lle;
+	struct sndcp_common_hdr *sch;
+	struct sndcp_comp_hdr *scomph;
+	struct sndcp_udata_hdr *suh;
+	struct msgb *fmsg;
+	unsigned int max_payload_len;
+	unsigned int len;
+	uint8_t *data;
+	int rc, more;
+
+	fmsg = msgb_alloc_headroom(fs->sne->lle->params.n201_u+256, 128,
+				   "SNDCP Frag");
+	if (!fmsg)
+		return -ENOMEM;
+
+	/* make sure lower layers route the fragment like the original */
+	msgb_tlli(fmsg) = msgb_tlli(fs->msg);
+	msgb_bvci(fmsg) = msgb_bvci(fs->msg);
+	msgb_nsei(fmsg) = msgb_nsei(fs->msg);
+
+	/* prepend common SNDCP header */
+	sch = (struct sndcp_common_hdr *) msgb_put(fmsg, sizeof(*sch));
+	sch->nsapi = sne->nsapi;
+	/* Set FIRST bit if we are the first fragment in a series */
+	if (fs->frag_nr == 0)
+		sch->first = 1;
+	sch->type = 1;
+
+	/* append the compression header for first fragment */
+	if (sch->first) {
+		scomph = (struct sndcp_comp_hdr *)
+				msgb_put(fmsg, sizeof(*scomph));
+		scomph->pcomp = 0;
+		scomph->dcomp = 0;
+	}
+
+	/* append the user-data header */
+	suh = (struct sndcp_udata_hdr *) msgb_put(fmsg, sizeof(*suh));
+	suh->npdu_low = sne->tx_npdu_nr & 0xff;
+	suh->npdu_high = (sne->tx_npdu_nr >> 8) & 0xf;
+	suh->seg_nr = fs->frag_nr % 0xf;
+
+	/* calculate remaining length to be sent */
+	len = (fs->msg->data + fs->msg->len) - fs->next_byte;
+	/* how much payload can we actually send via LLC? */
+	max_payload_len = lle->params.n201_u - (sizeof(*sch) + sizeof(*suh));
+	if (sch->first)
+		max_payload_len -= sizeof(*scomph);
+	/* check if we're exceeding the max */
+	if (len > max_payload_len)
+		len = max_payload_len;
+
+	/* copy the actual fragment data into our fmsg */
+	data = msgb_put(fmsg, len);
+	memcpy(data, fs->next_byte, len);
+
+	/* Increment fragment number and data pointer to next fragment */
+	fs->frag_nr++;
+	fs->next_byte += len;
+
+	/* determine if we have more fragemnts to send */
+	if ((fs->msg->data + fs->msg->len) <= fs->next_byte)
+		more = 0;
+	else
+		more = 1;
+
+	/* set the MORE bit of the SNDCP header accordingly */
+	sch->more = more;
+
+	rc = gprs_llc_tx_ui(fmsg, lle->sapi, 0, fs->mmcontext);
+	if (rc < 0) {
+		/* abort in case of error, do not advance frag_nr / next_byte */
+		msgb_free(fmsg);
+		return rc;
+	}
+
+	if (!more) {
+		/* we've sent all fragments */
+		msgb_free(fs->msg);
+		memset(fs, 0, sizeof(*fs));
+		/* increment NPDU number for next frame */
+		sne->tx_npdu_nr = (sne->tx_npdu_nr + 1) % 0xfff;
+		return 0;
+	}
+
+	/* default: more fragments to send */
+	return 1;
+}
+
+/* Request transmission of a SN-PDU over specified LLC Entity + SAPI */
+int sndcp_unitdata_req(struct msgb *msg, struct gprs_llc_lle *lle, uint8_t nsapi,
+			void *mmcontext)
+{
+	struct gprs_sndcp_entity *sne;
+	struct sndcp_common_hdr *sch;
+	struct sndcp_comp_hdr *scomph;
+	struct sndcp_udata_hdr *suh;
+	struct sndcp_frag_state fs;
+
+	/* Identifiers from UP: (TLLI, SAPI) + (BVCI, NSEI) */
+
+	sne = gprs_sndcp_entity_by_lle(lle, nsapi);
+	if (!sne) {
+		LOGP(DSNDCP, LOGL_ERROR, "Cannot find SNDCP Entity\n");
+		return -EIO;
+	}
+
+	/* Check if we need to fragment this N-PDU into multiple SN-PDUs */
+	if (msg->len > lle->params.n201_u - 
+			(sizeof(*sch) + sizeof(*suh) + sizeof(*scomph))) {
+		/* initialize the fragmenter state */
+		fs.msg = msg;
+		fs.frag_nr = 0;
+		fs.next_byte = msg->data;
+		fs.sne = sne;
+		fs.mmcontext = mmcontext;
+
+		/* call function to generate and send fragments until all
+		 * of the N-PDU has been sent */
+		while (1) {
+			int rc = sndcp_send_ud_frag(&fs);
+			if (rc == 0)
+				return 0;
+			if (rc < 0)
+				return rc;
+		}
+		/* not reached */
+		return 0;
+	}
+
+	/* this is the non-fragmenting case where we only build 1 SN-PDU */
+
+	/* prepend the user-data header */
+	suh = (struct sndcp_udata_hdr *) msgb_push(msg, sizeof(*suh));
+	suh->npdu_low = sne->tx_npdu_nr & 0xff;
+	suh->npdu_high = (sne->tx_npdu_nr >> 8) & 0xf;
+	suh->seg_nr = 0;
+	sne->tx_npdu_nr = (sne->tx_npdu_nr + 1) % 0xfff;
+
+	scomph = (struct sndcp_comp_hdr *) msgb_push(msg, sizeof(*scomph));
+	scomph->pcomp = 0;
+	scomph->dcomp = 0;
+
+	/* prepend common SNDCP header */
+	sch = (struct sndcp_common_hdr *) msgb_push(msg, sizeof(*sch));
+	sch->first = 1;
+	sch->type = 1;
+	sch->nsapi = nsapi;
+
+	return gprs_llc_tx_ui(msg, lle->sapi, 0, mmcontext);
+}
+
+/* Section 5.1.2.17 LL-UNITDATA.ind */
+int sndcp_llunitdata_ind(struct msgb *msg, struct gprs_llc_lle *lle,
+			 uint8_t *hdr, uint16_t len)
+{
+	struct gprs_sndcp_entity *sne;
+	struct sndcp_common_hdr *sch = (struct sndcp_common_hdr *)hdr;
+	struct sndcp_comp_hdr *scomph = NULL;
+	struct sndcp_udata_hdr *suh;
+	uint8_t *npdu;
+	uint16_t npdu_num;
+	int npdu_len;
+
+	sch = (struct sndcp_common_hdr *) hdr;
+	if (sch->first) {
+		scomph = (struct sndcp_comp_hdr *) (hdr + 1);
+		suh = (struct sndcp_udata_hdr *) (hdr + 1 + sizeof(struct sndcp_common_hdr));
+	} else
+		suh = (struct sndcp_udata_hdr *) (hdr + sizeof(struct sndcp_common_hdr));
+
+	if (sch->type == 0) {
+		LOGP(DSNDCP, LOGL_ERROR, "SN-DATA PDU at unitdata_ind() function\n");
+		return -EINVAL;
+	}
+
+	if (len < sizeof(*sch) + sizeof(*suh)) {
+		LOGP(DSNDCP, LOGL_ERROR, "SN-UNITDATA PDU too short (%u)\n", len);
+		return -EIO;
+	}
+
+	sne = gprs_sndcp_entity_by_lle(lle, sch->nsapi);
+	if (!sne) {
+		LOGP(DSNDCP, LOGL_ERROR, "Message for non-existing SNDCP Entity "
+			"(lle=%p, TLLI=%08x, SAPI=%u, NSAPI=%u)\n", lle,
+			lle->llme->tlli, lle->sapi, sch->nsapi);
+		return -EIO;
+	}
+	/* FIXME: move this RA_ID up to the LLME or even higher */
+	bssgp_parse_cell_id(&sne->ra_id, msgb_bcid(msg));
+
+	/* any non-first segment is by definition something to defragment
+	 * as is any segment that tells us there are more segments */
+	if (!sch->first || sch->more)
+		return defrag_input(sne, msg, hdr, len);
+
+	if (scomph && (scomph->pcomp || scomph->dcomp)) {
+		LOGP(DSNDCP, LOGL_ERROR, "We don't support compression yet\n");
+		return -EIO;
+	}
+
+	npdu_num = (suh->npdu_high << 8) | suh->npdu_low;
+	npdu = (uint8_t *)suh + sizeof(*suh);
+	npdu_len = (msg->data + msg->len) - npdu;
+	if (npdu_len <= 0) {
+		LOGP(DSNDCP, LOGL_ERROR, "Short SNDCP N-PDU: %d\n", npdu_len);
+		return -EIO;
+	}
+	/* actually send the N-PDU to the SGSN core code, which then
+	 * hands it off to the correct GTP tunnel + GGSN via gtp_data_req() */
+	return sgsn_rx_sndcp_ud_ind(&sne->ra_id, lle->llme->tlli, sne->nsapi, msg, npdu_len, npdu);
+}
+
+/* Section 5.1.2.1 LL-RESET.ind */
+static int sndcp_ll_reset_ind(struct gprs_sndcp_entity *se)
+{
+	/* treat all outstanding SNDCP-LLC request type primitives as not sent */
+	/* reset all SNDCP XID parameters to default values */
+}
+
+static int sndcp_ll_status_ind()
+{
+	/* inform the SM sub-layer by means of SNSM-STATUS.req */
+}
+
+#if 0
+static struct sndcp_state_list {{
+	uint32_t	states;
+	unsigned int	type;
+	int		(*rout)(struct gprs_sndcp_entity *se, struct msgb *msg);
+} sndcp_state_list[] = {
+	{ ALL_STATES,
+	  LL_RESET_IND, sndcp_ll_reset_ind },
+	{ ALL_STATES,
+	  LL_ESTABLISH_IND, sndcp_ll_est_ind },
+	{ SBIT(SNDCP_S_EST_RQD),
+	  LL_ESTABLISH_RESP, sndcp_ll_est_ind },
+	{ SBIT(SNDCP_S_EST_RQD),
+	  LL_ESTABLISH_CONF, sndcp_ll_est_conf },
+	{ SBIT(SNDCP_S_
+};
+
+static int sndcp_rx_llc_prim()
+{
+	case LL_ESTABLISH_REQ:
+	case LL_RELEASE_REQ:
+	case LL_XID_REQ:
+	case LL_DATA_REQ:
+	LL_UNITDATA_REQ,	/* TLLI, SN-PDU, Ref, QoS, Radio Prio, Ciph */
+
+	switch (prim) {
+	case LL_RESET_IND:
+	case LL_ESTABLISH_IND:
+	case LL_ESTABLISH_RESP:
+	case LL_ESTABLISH_CONF:
+	case LL_RELEASE_IND:
+	case LL_RELEASE_CONF:
+	case LL_XID_IND:
+	case LL_XID_RESP:
+	case LL_XID_CONF:
+	case LL_DATA_IND:
+	case LL_DATA_CONF:
+	case LL_UNITDATA_IND:
+	case LL_STATUS_IND:
+}
+#endif
diff --git a/src/gprs/gprs_sndcp.h b/src/gprs/gprs_sndcp.h
new file mode 100644
index 000000000..e9a50be1c
--- /dev/null
+++ b/src/gprs/gprs_sndcp.h
@@ -0,0 +1,53 @@
+#ifndef _INT_SNDCP_H
+#define _INT_SNDCP_H
+
+#include <stdint.h>
+#include <osmocore/linuxlist.h>
+
+/* A fragment queue header, maintaining list of fragments for one N-PDU */
+struct defrag_state {
+	/* PDU number for which the defragmentation state applies */
+	uint16_t npdu;
+	/* highest segment number we have received so far */
+	uint8_t highest_seg;
+	/* bitmask of the segments we already have */
+	uint32_t seg_have;
+	/* do we still expect more segments? */
+	unsigned int no_more;
+	/* total length of all segments together */
+	unsigned int tot_len;
+
+	/* linked list of defrag_queue_entry: one for each fragment  */
+	struct llist_head frag_list;
+
+	struct timer_list timer;
+};
+
+/* See 6.7.1.2 Reassembly */
+enum sndcp_rx_state {
+	SNDCP_RX_S_FIRST,
+	SNDCP_RX_S_SUBSEQ,
+	SNDCP_RX_S_DISCARD,
+};
+
+struct gprs_sndcp_entity {
+	struct llist_head list;
+
+	/* FIXME: move this RA_ID up to the LLME or even higher */
+	struct gprs_ra_id ra_id;
+	/* reference to the LLC Entity below this SNDCP entity */
+	struct gprs_llc_lle *lle;
+	/* The NSAPI we shall use on top of LLC */
+	uint8_t nsapi;
+
+	/* NPDU number for the GTP->SNDCP side */
+	uint16_t tx_npdu_nr;
+	/* SNDCP eeceiver state */
+	enum sndcp_rx_state rx_state;
+	/* The defragmentation queue */
+	struct defrag_state defrag;
+};
+
+extern struct llist_head gprs_sndcp_entities;
+
+#endif	/* INT_SNDCP_H */
diff --git a/src/gprs/gprs_sndcp_vty.c b/src/gprs/gprs_sndcp_vty.c
new file mode 100644
index 000000000..5a755d5f7
--- /dev/null
+++ b/src/gprs/gprs_sndcp_vty.c
@@ -0,0 +1,74 @@
+/* VTY interface for our GPRS SNDCP implementation */
+
+/* (C) 2010 by Harald Welte <laforge@gnumonks.org>
+ *
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <stdlib.h>
+#include <unistd.h>
+#include <errno.h>
+#include <stdint.h>
+
+#include <arpa/inet.h>
+
+#include <openbsc/gsm_data.h>
+#include <osmocore/msgb.h>
+#include <osmocore/tlv.h>
+#include <osmocore/talloc.h>
+#include <osmocore/select.h>
+#include <osmocore/rate_ctr.h>
+#include <openbsc/debug.h>
+#include <openbsc/signal.h>
+#include <openbsc/gprs_llc.h>
+
+#include "gprs_sndcp.h"
+
+#include <osmocom/vty/vty.h>
+#include <osmocom/vty/command.h>
+
+static void vty_dump_sne(struct vty *vty, struct gprs_sndcp_entity *sne)
+{
+	unsigned int i;
+
+	vty_out(vty, " TLLI %08x SAPI=%u NSAPI=%u:%s",
+		sne->lle->llme->tlli, sne->lle->sapi, sne->nsapi, VTY_NEWLINE);
+	vty_out(vty, "  Defrag: npdu=%u highest_seg=%u seg_have=0x%08x tot_len=%u%s",
+		sne->defrag.npdu, sne->defrag.highest_seg, sne->defrag.seg_have,
+		sne->defrag.tot_len, VTY_NEWLINE);
+}
+
+
+DEFUN(show_sndcp, show_sndcp_cmd,
+	"show sndcp",
+	SHOW_STR "Display information about the SNDCP protocol")
+{
+	struct gprs_sndcp_entity *sne;
+
+	vty_out(vty, "State of SNDCP Entities%s", VTY_NEWLINE);
+	llist_for_each_entry(sne, &gprs_sndcp_entities, list)
+		vty_dump_sne(vty, sne);
+
+	return CMD_SUCCESS;
+}
+
+int gprs_sndcp_vty_init(void)
+{
+	install_element_ve(&show_sndcp_cmd);
+
+	return 0;
+}
diff --git a/src/gprs/sgsn_libgtp.c b/src/gprs/sgsn_libgtp.c
new file mode 100644
index 000000000..7b10a45a3
--- /dev/null
+++ b/src/gprs/sgsn_libgtp.c
@@ -0,0 +1,610 @@
+/* GPRS SGSN integration with libgtp of OpenGGSN */
+/* libgtp implements the GPRS Tunelling Protocol GTP per TS 09.60 / 29.060 */
+
+/* (C) 2010 by Harald Welte <laforge@gnumonks.org>
+ * (C) 2010 by On-Waves
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <getopt.h>
+#include <errno.h>
+#include <signal.h>
+#include <sys/fcntl.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+#include <osmocore/talloc.h>
+#include <osmocore/select.h>
+#include <osmocore/rate_ctr.h>
+#include <openbsc/gsm_04_08_gprs.h>
+
+#include <openbsc/signal.h>
+#include <openbsc/debug.h>
+#include <openbsc/sgsn.h>
+#include <openbsc/gprs_llc.h>
+#include <openbsc/gprs_bssgp.h>
+#include <openbsc/gprs_sgsn.h>
+#include <openbsc/gprs_gmm.h>
+
+#include <gtp.h>
+#include <pdp.h>
+
+const struct value_string gtp_cause_strs[] = {
+	{ GTPCAUSE_REQ_IMSI, "Request IMSI" },
+	{ GTPCAUSE_REQ_IMEI, "Request IMEI" },
+	{ GTPCAUSE_REQ_IMSI_IMEI, "Request IMSI and IMEI" },
+	{ GTPCAUSE_NO_ID_NEEDED, "No identity needed" },
+	{ GTPCAUSE_MS_REFUSES_X, "MS refuses" },
+	{ GTPCAUSE_MS_NOT_RESP_X, "MS is not GPRS responding" },
+	{ GTPCAUSE_ACC_REQ, "Request accepted" },
+	{ GTPCAUSE_NON_EXIST, "Non-existent" },
+	{ GTPCAUSE_INVALID_MESSAGE, "Invalid message format" },
+	{ GTPCAUSE_IMSI_NOT_KNOWN, "IMSI not known" },
+	{ GTPCAUSE_MS_DETACHED, "MS is GPRS detached" },
+	{ GTPCAUSE_MS_NOT_RESP, "MS is not GPRS responding" },
+	{ GTPCAUSE_MS_REFUSES, "MS refuses" },
+	{ GTPCAUSE_NO_RESOURCES, "No resources available" },
+	{ GTPCAUSE_NOT_SUPPORTED, "Service not supported" },
+	{ GTPCAUSE_MAN_IE_INCORRECT, "Mandatory IE incorrect" },
+	{ GTPCAUSE_MAN_IE_MISSING, "Mandatory IE missing" },
+	{ GTPCAUSE_OPT_IE_INCORRECT, "Optional IE incorrect" },
+	{ GTPCAUSE_SYS_FAIL, "System failure" },
+	{ GTPCAUSE_ROAMING_REST, "Roaming restrictions" },
+	{ GTPCAUSE_PTIMSI_MISMATCH, "P-TMSI Signature mismatch" },
+	{ GTPCAUSE_CONN_SUSP, "GPRS connection suspended" },
+	{ GTPCAUSE_AUTH_FAIL, "Authentication failure" },
+	{ GTPCAUSE_USER_AUTH_FAIL, "User authentication failed" },
+	{ GTPCAUSE_CONTEXT_NOT_FOUND, "Context not found" },
+	{ GTPCAUSE_ADDR_OCCUPIED, "All dynamic PDP addresses occupied" },
+	{ GTPCAUSE_NO_MEMORY, "No memory is available" },
+	{ GTPCAUSE_RELOC_FAIL, "Relocation failure" },
+	{ GTPCAUSE_UNKNOWN_MAN_EXTHEADER, "Unknown mandatory ext. header" },
+	{ GTPCAUSE_SEM_ERR_TFT, "Semantic error in TFT operation" },
+	{ GTPCAUSE_SYN_ERR_TFT, "Syntactic error in TFT operation" },
+	{ GTPCAUSE_SEM_ERR_FILTER, "Semantic errors in packet filter" },
+	{ GTPCAUSE_SYN_ERR_FILTER, "Syntactic errors in packet filter" },
+	{ GTPCAUSE_MISSING_APN, "Missing or unknown APN" },
+	{ GTPCAUSE_UNKNOWN_PDP, "Unknown PDP address or PDP type" },
+	{ 0, NULL }
+};
+
+/* Generate the GTP IMSI IE according to 09.60 Section 7.9.2 */
+static uint64_t imsi_str2gtp(char *str)
+{
+	uint64_t imsi64 = 0;
+	unsigned int n;
+	unsigned int imsi_len = strlen(str);
+
+	if (imsi_len > 16) {
+		LOGP(DGPRS, LOGL_NOTICE, "IMSI length > 16 not supported!\n");
+		return 0;
+	}
+
+	for (n = 0; n < 16; n++) {
+		uint64_t val;
+		if (n < imsi_len)
+			val = (str[n]-'0') & 0xf;
+		else
+			val = 0xf;
+		imsi64 |= (val << (n*4));
+	}
+	return imsi64;
+}
+
+/* generate a PDP context based on the IE's from the 04.08 message,
+ * and send the GTP create pdp context request to the GGSN */
+struct sgsn_pdp_ctx *sgsn_create_pdp_ctx(struct sgsn_ggsn_ctx *ggsn,
+					 struct sgsn_mm_ctx *mmctx,
+					 uint16_t nsapi,
+					 struct tlv_parsed *tp)
+{
+	struct sgsn_pdp_ctx *pctx;
+	struct pdp_t *pdp;
+	uint64_t imsi_ui64;
+	int rc;
+
+	LOGP(DGPRS, LOGL_ERROR, "Create PDP Context\n");
+	pctx = sgsn_pdp_ctx_alloc(mmctx, nsapi);
+	if (!pctx) {
+		LOGP(DGPRS, LOGL_ERROR, "Couldn't allocate PDP Ctx\n");
+		return NULL;
+	}
+
+	imsi_ui64 = imsi_str2gtp(mmctx->imsi);
+
+	rc = pdp_newpdp(&pdp, imsi_ui64, nsapi, NULL);
+	if (rc) {
+		LOGP(DGPRS, LOGL_ERROR, "Out of libgtp PDP Contexts\n");
+		return NULL;
+	}
+	pdp->priv = pctx;
+	pctx->lib = pdp;
+	pctx->ggsn = ggsn;
+
+	//pdp->peer =	/* sockaddr_in of GGSN (receive) */
+	//pdp->ipif =	/* not used by library */
+	pdp->version = ggsn->gtp_version;
+	pdp->hisaddr0 =	ggsn->remote_addr;
+	pdp->hisaddr1 = ggsn->remote_addr;
+	//pdp->cch_pdp = 512;	/* Charging Flat Rate */
+
+	/* MS provided APN, subscription not verified */
+	pdp->selmode = 0x01;
+
+	/* IMSI, TEID/TEIC, FLLU/FLLC, TID, NSAPI set in pdp_newpdp */
+
+	/* FIXME: MSISDN in BCD format from mmctx */
+	//pdp->msisdn.l/.v
+
+	/* End User Address from GMM requested PDP address */
+	pdp->eua.l = TLVP_LEN(tp, OSMO_IE_GSM_REQ_PDP_ADDR);
+	if (pdp->eua.l > sizeof(pdp->eua.v))
+		pdp->eua.l = sizeof(pdp->eua.v);
+	memcpy(pdp->eua.v, TLVP_VAL(tp, OSMO_IE_GSM_REQ_PDP_ADDR),
+		pdp->eua.l);
+	/* Highest 4 bits of first byte need to be set to 1, otherwise
+	 * the IE is identical with the 04.08 PDP Address IE */
+	pdp->eua.v[0] |= 0xf0;
+
+	/* APN name from GMM */
+	pdp->apn_use.l = TLVP_LEN(tp, GSM48_IE_GSM_APN);
+	if (pdp->apn_use.l > sizeof(pdp->apn_use.v))
+		pdp->apn_use.l = sizeof(pdp->apn_use.v);
+	memcpy(pdp->apn_use.v, TLVP_VAL(tp, GSM48_IE_GSM_APN),
+		pdp->apn_use.l);
+
+	/* Protocol Configuration Options from GMM */
+	pdp->pco_req.l = TLVP_LEN(tp, GSM48_IE_GSM_PROTO_CONF_OPT);
+	if (pdp->pco_req.l > sizeof(pdp->pco_req.v))
+		pdp->pco_req.l = sizeof(pdp->pco_req.v);
+	memcpy(pdp->pco_req.v, TLVP_VAL(tp, GSM48_IE_GSM_PROTO_CONF_OPT),
+		pdp->pco_req.l);
+
+	/* QoS options from GMM */
+	pdp->qos_req.l = TLVP_LEN(tp, OSMO_IE_GSM_REQ_QOS);
+	if (pdp->qos_req.l > sizeof(pdp->qos_req.v))
+		pdp->qos_req.l = sizeof(pdp->qos_req.v);
+	memcpy(pdp->qos_req.v, TLVP_VAL(tp, OSMO_IE_GSM_REQ_QOS),
+		pdp->qos_req.l);
+
+	/* SGSN address for control plane */
+	pdp->gsnlc.l = sizeof(sgsn->cfg.gtp_listenaddr.sin_addr);
+	memcpy(pdp->gsnlc.v, &sgsn->cfg.gtp_listenaddr.sin_addr,
+		sizeof(sgsn->cfg.gtp_listenaddr.sin_addr));
+
+	/* SGSN address for user plane */
+	pdp->gsnlu.l = sizeof(sgsn->cfg.gtp_listenaddr.sin_addr);
+	memcpy(pdp->gsnlu.v, &sgsn->cfg.gtp_listenaddr.sin_addr,
+		sizeof(sgsn->cfg.gtp_listenaddr.sin_addr));
+
+	/* change pdp state to 'requested' */
+	pctx->state = PDP_STATE_CR_REQ;
+
+	rc = gtp_create_context_req(ggsn->gsn, pdp, pctx);
+	/* FIXME */
+
+	return pctx;
+}
+
+/* SGSN wants to delete a PDP context */
+int sgsn_delete_pdp_ctx(struct sgsn_pdp_ctx *pctx)
+{
+	LOGP(DGPRS, LOGL_ERROR, "Delete PDP Context\n");
+
+	/* FIXME: decide if we need teardown or not ! */
+	return gtp_delete_context_req(pctx->ggsn->gsn, pctx->lib, pctx, 1);
+}
+
+struct cause_map {
+	uint8_t cause_in;
+	uint8_t cause_out;
+};
+
+static uint8_t cause_map(const struct cause_map *map, uint8_t in, uint8_t deflt)
+{
+	const struct cause_map *m;
+
+	for (m = map; m->cause_in && m->cause_out; m++) {
+		if (m->cause_in == in)
+			return m->cause_out;
+	}
+	return deflt;
+}
+
+/* how do we map from gtp cause to SM cause */
+static const struct cause_map gtp2sm_cause_map[] = {
+	{ GTPCAUSE_NO_RESOURCES, 	GSM_CAUSE_INSUFF_RSRC },
+	{ GTPCAUSE_NOT_SUPPORTED,	GSM_CAUSE_SERV_OPT_NOTSUPP },
+	{ GTPCAUSE_MAN_IE_INCORRECT,	GSM_CAUSE_INV_MAND_INFO },
+	{ GTPCAUSE_MAN_IE_MISSING,	GSM_CAUSE_INV_MAND_INFO },
+	{ GTPCAUSE_OPT_IE_INCORRECT,	GSM_CAUSE_PROTO_ERR_UNSPEC },
+	{ GTPCAUSE_SYS_FAIL,		GSM_CAUSE_NET_FAIL },
+	{ GTPCAUSE_ROAMING_REST,	GSM_CAUSE_REQ_SERV_OPT_NOTSUB },
+	{ GTPCAUSE_PTIMSI_MISMATCH,	GSM_CAUSE_PROTO_ERR_UNSPEC },
+	{ GTPCAUSE_CONN_SUSP,		GSM_CAUSE_PROTO_ERR_UNSPEC },
+	{ GTPCAUSE_AUTH_FAIL,		GSM_CAUSE_AUTH_FAILED },
+	{ GTPCAUSE_USER_AUTH_FAIL,	GSM_CAUSE_ACT_REJ_GGSN },
+	{ GTPCAUSE_CONTEXT_NOT_FOUND,	GSM_CAUSE_PROTO_ERR_UNSPEC },
+	{ GTPCAUSE_ADDR_OCCUPIED,	GSM_CAUSE_INSUFF_RSRC },
+	{ GTPCAUSE_NO_MEMORY,		GSM_CAUSE_INSUFF_RSRC },
+	{ GTPCAUSE_RELOC_FAIL,		GSM_CAUSE_PROTO_ERR_UNSPEC },
+	{ GTPCAUSE_UNKNOWN_MAN_EXTHEADER, GSM_CAUSE_PROTO_ERR_UNSPEC },
+	{ GTPCAUSE_MISSING_APN,		GSM_CAUSE_MISSING_APN },
+	{ GTPCAUSE_UNKNOWN_PDP,		GSM_CAUSE_UNKNOWN_PDP },
+	{ 0, 0 }
+};
+
+/* The GGSN has confirmed the creation of a PDP Context */
+static int create_pdp_conf(struct pdp_t *pdp, void *cbp, int cause)
+{
+	struct sgsn_pdp_ctx *pctx = cbp;
+	uint8_t reject_cause;
+	int rc;
+
+	DEBUGP(DGPRS, "Received CREATE PDP CTX CONF, cause=%d(%s)\n",
+		cause, get_value_string(gtp_cause_strs, cause));
+
+	/* Check for cause value if it was really successful */
+	if (cause < 0) {
+		LOGP(DGPRS, LOGL_NOTICE, "Create PDP ctx req timed out\n");
+		if (pdp && pdp->version == 1) {
+			pdp->version = 0;
+			gtp_create_context_req(sgsn->gsn, pdp, cbp);
+			return 0;
+		} else {
+			reject_cause = GSM_CAUSE_NET_FAIL;
+			goto reject;
+		}
+	}
+
+	/* Check for cause value if it was really successful */
+	if (cause != GTPCAUSE_ACC_REQ) {
+		reject_cause = cause_map(gtp2sm_cause_map, cause,
+					 GSM_CAUSE_ACT_REJ_GGSN);
+		goto reject;
+	}
+
+	/* Activate the SNDCP layer */
+	sndcp_sm_activate_ind(&pctx->mm->llme->lle[pctx->sapi], pctx->nsapi);
+
+	/* Send PDP CTX ACT to MS */
+	return gsm48_tx_gsm_act_pdp_acc(pctx);
+
+reject:
+	pctx->state = PDP_STATE_NONE;
+	if (pdp)
+		pdp_freepdp(pdp);
+	/* Send PDP CTX ACT REJ to MS */
+	rc = gsm48_tx_gsm_act_pdp_rej(pctx->mm, pctx->ti, reject_cause,
+					0, NULL);
+	sgsn_pdp_ctx_free(pctx);
+
+	return EOF;
+}
+
+/* Confirmation of a PDP Context Delete */
+static int delete_pdp_conf(struct pdp_t *pdp, void *cbp, int cause)
+{
+	struct sgsn_pdp_ctx *pctx = cbp;
+	int rc;
+
+	DEBUGP(DGPRS, "Received DELETE PDP CTX CONF, cause=%d(%s)\n",
+		cause, get_value_string(gtp_cause_strs, cause));
+
+	/* Deactivate the SNDCP layer */
+	sndcp_sm_deactivate_ind(&pctx->mm->llme->lle[pctx->sapi], pctx->nsapi);
+
+	/* Confirm deactivation of PDP context to MS */
+	rc = gsm48_tx_gsm_deact_pdp_acc(pctx);
+
+	sgsn_pdp_ctx_free(pctx);
+
+	return rc;
+}
+
+/* Confirmation of an GTP ECHO request */
+static int echo_conf(struct pdp_t *pdp, void *cbp, int recovery)
+{
+	if (recovery < 0) {
+		DEBUGP(DGPRS, "GTP Echo Request timed out\n");
+		/* FIXME: if version == 1, retry with version 0 */
+	} else {
+		DEBUGP(DGPRS, "GTP Rx Echo Response\n");
+	}
+	return 0;
+}
+
+/* Any message received by GGSN contains a recovery IE */
+static int cb_recovery(struct sockaddr_in *peer, uint8_t recovery)
+{
+	struct sgsn_ggsn_ctx *ggsn;
+	
+	ggsn = sgsn_ggsn_ctx_by_addr(&peer->sin_addr);
+	if (!ggsn) {
+		DEBUGP(DGPRS, "Received Recovery IE for unknown GGSN\n");
+		return -EINVAL;
+	}
+
+	if (ggsn->remote_restart_ctr == -1) {
+		/* First received ECHO RESPONSE, note the restart ctr */
+		ggsn->remote_restart_ctr = recovery;
+	} else if (ggsn->remote_restart_ctr != recovery) {
+		/* counter has changed (GGSN restart): release all PDP */
+		LOGP(DGPRS, LOGL_NOTICE, "GGSN recovery (%u->%u), "
+		     "releasing all PDP contexts\n",
+		     ggsn->remote_restart_ctr, recovery);
+		ggsn->remote_restart_ctr = recovery;
+		drop_all_pdp_for_ggsn(ggsn);
+	}
+	return 0;
+}
+
+/* libgtp callback for confirmations */
+static int cb_conf(int type, int cause, struct pdp_t *pdp, void *cbp)
+{
+	DEBUGP(DGPRS, "libgtp cb_conf(type=%d, cause=%d, pdp=%p, cbp=%p)\n",
+		type, cause, pdp, cbp);
+
+	if (cause == EOF)
+		LOGP(DGPRS, LOGL_ERROR, "libgtp EOF (type=%u, pdp=%p, cbp=%p)\n",
+			type, pdp, cbp);
+
+	switch (type) {
+	case GTP_ECHO_REQ:
+		/* libgtp hands us the RECOVERY number instead of a cause */
+		return echo_conf(pdp, cbp, cause);
+	case GTP_CREATE_PDP_REQ:
+		return create_pdp_conf(pdp, cbp, cause);
+	case GTP_DELETE_PDP_REQ:
+		return delete_pdp_conf(pdp, cbp, cause);
+	default:
+		break;
+	}
+	return 0;
+}
+
+/* Called whenever a PDP context is deleted for any reason */
+static int cb_delete_context(struct pdp_t *pdp)
+{
+	LOGP(DGPRS, LOGL_INFO, "PDP Context was deleted\n");
+	return 0;
+}
+
+/* Called when we receive a Version Not Supported message */
+static int cb_unsup_ind(struct sockaddr_in *peer)
+{
+	LOGP(DGPRS, LOGL_INFO, "GTP Version not supported Indication "
+		"from %s:%u\n", inet_ntoa(peer->sin_addr),
+		ntohs(peer->sin_port));
+	return 0;
+}
+
+/* Called when we receive a Supported Ext Headers Notification */
+static int cb_extheader_ind(struct sockaddr_in *peer)
+{
+	LOGP(DGPRS, LOGL_INFO, "GTP Supported Ext Headers Noficiation "
+		"from %s:%u\n", inet_ntoa(peer->sin_addr),
+		ntohs(peer->sin_port));
+	return 0;
+}
+
+/* Called whenever we recive a DATA packet */
+static int cb_data_ind(struct pdp_t *lib, void *packet, unsigned int len)
+{
+	struct bssgp_paging_info pinfo;
+	struct sgsn_pdp_ctx *pdp;
+	struct sgsn_mm_ctx *mm;
+	struct msgb *msg;
+	uint8_t *ud;
+	int rc;
+
+	DEBUGP(DGPRS, "GTP DATA IND from GGSN, length=%u\n", len);
+
+	pdp = lib->priv;
+	if (!pdp) {
+		DEBUGP(DGPRS, "GTP DATA IND from GGSN for unknown PDP\n");
+		return -EIO;
+	}
+	mm = pdp->mm;
+
+	msg = msgb_alloc_headroom(len+256, 128, "GTP->SNDCP");
+	ud = msgb_put(msg, len);
+	memcpy(ud, packet, len);
+
+	msgb_tlli(msg) = mm->tlli;
+	msgb_bvci(msg) = mm->bvci;
+	msgb_nsei(msg) = mm->nsei;
+
+	switch (mm->mm_state) {
+	case GMM_REGISTERED_SUSPENDED:
+		/* initiate PS PAGING procedure */
+		memset(&pinfo, 0, sizeof(pinfo));
+		pinfo.mode = BSSGP_PAGING_PS;
+		pinfo.scope = BSSGP_PAGING_BVCI;
+		pinfo.bvci = mm->bvci;
+		pinfo.imsi = mm->imsi;
+		pinfo.ptmsi = &mm->p_tmsi;
+		pinfo.drx_params = mm->drx_parms;
+		pinfo.qos[0] = 0; // FIXME
+		rc = gprs_bssgp_tx_paging(mm->nsei, 0, &pinfo);
+		rate_ctr_inc(&mm->ctrg->ctr[GMM_CTR_PAGING_PS]);
+		/* FIXME: queue the packet we received from GTP */
+		break;
+	case GMM_REGISTERED_NORMAL:
+		break;
+	default:
+		LOGP(DGPRS, LOGL_ERROR, "GTP DATA IND for TLLI %08X in state "
+			"%u\n", mm->tlli, mm->mm_state);
+		msgb_free(msg);
+		return -1;
+	}
+
+	rate_ctr_inc(&pdp->ctrg->ctr[PDP_CTR_PKTS_UDATA_OUT]);
+	rate_ctr_add(&pdp->ctrg->ctr[PDP_CTR_BYTES_UDATA_OUT], len);
+	rate_ctr_inc(&mm->ctrg->ctr[GMM_CTR_PKTS_UDATA_OUT]);
+	rate_ctr_add(&mm->ctrg->ctr[GMM_CTR_BYTES_UDATA_OUT], len);
+
+	return sndcp_unitdata_req(msg, &mm->llme->lle[pdp->sapi],
+				  pdp->nsapi, mm);
+}
+
+/* Called by SNDCP when it has received/re-assembled a N-PDU */
+int sgsn_rx_sndcp_ud_ind(struct gprs_ra_id *ra_id, int32_t tlli, uint8_t nsapi,
+			 struct msgb *msg, uint32_t npdu_len, uint8_t *npdu)
+{
+	struct sgsn_mm_ctx *mmctx;
+	struct sgsn_pdp_ctx *pdp;
+
+	/* look-up the MM context for this message */
+	mmctx = sgsn_mm_ctx_by_tlli(tlli, ra_id);
+	if (!mmctx) {
+		LOGP(DGPRS, LOGL_ERROR,
+			"Cannot find MM CTX for TLLI %08x\n", tlli);
+		return -EIO;
+	}
+	/* look-up the PDP context for this message */
+	pdp = sgsn_pdp_ctx_by_nsapi(mmctx, nsapi);
+	if (!pdp) {
+		LOGP(DGPRS, LOGL_ERROR, "Cannot find PDP CTX for "
+			"TLLI=%08x, NSAPI=%u\n", tlli, nsapi);
+		return -EIO;
+	}
+	if (!pdp->lib) {
+		LOGP(DGPRS, LOGL_ERROR, "PDP CTX without libgtp\n");
+		return -EIO;
+	}
+
+	rate_ctr_inc(&pdp->ctrg->ctr[PDP_CTR_PKTS_UDATA_IN]);
+	rate_ctr_add(&pdp->ctrg->ctr[PDP_CTR_BYTES_UDATA_IN], npdu_len);
+	rate_ctr_inc(&mmctx->ctrg->ctr[GMM_CTR_PKTS_UDATA_IN]);
+	rate_ctr_add(&mmctx->ctrg->ctr[GMM_CTR_BYTES_UDATA_IN], npdu_len);
+
+	return gtp_data_req(pdp->ggsn->gsn, pdp->lib, npdu, npdu_len);
+
+	return gtp_data_req(pdp->ggsn->gsn, pdp->lib, npdu, npdu_len);
+}
+
+/* libgtp select loop integration */
+static int sgsn_gtp_fd_cb(struct bsc_fd *fd, unsigned int what)
+{
+	struct sgsn_instance *sgi = fd->data;
+	int rc;
+
+	if (!(what & BSC_FD_READ))
+		return 0;
+
+	switch (fd->priv_nr) {
+	case 0:
+		rc = gtp_decaps0(sgi->gsn);
+		break;
+	case 1:
+		rc = gtp_decaps1c(sgi->gsn);
+		break;
+	case 2:
+		rc = gtp_decaps1u(sgi->gsn);
+		break;
+	default:
+		rc = -EINVAL;
+		break;
+	}
+	return rc;
+}
+
+static void sgsn_gtp_tmr_start(struct sgsn_instance *sgi)
+{
+	struct timeval next;
+
+	/* Retrieve next retransmission as struct timeval */
+	gtp_retranstimeout(sgi->gsn, &next);
+
+	/* re-schedule the timer */
+	bsc_schedule_timer(&sgi->gtp_timer, next.tv_sec, next.tv_usec/1000);
+}
+
+/* timer callback for libgtp retransmissions and ping */
+static void sgsn_gtp_tmr_cb(void *data)
+{
+	struct sgsn_instance *sgi = data;
+
+	/* Do all the retransmissions as needed */
+	gtp_retrans(sgi->gsn);
+
+	sgsn_gtp_tmr_start(sgi);
+}
+
+int sgsn_gtp_init(struct sgsn_instance *sgi)
+{
+	int rc;
+	struct gsn_t *gsn;
+
+	rc = gtp_new(&sgi->gsn, sgi->cfg.gtp_statedir,
+		     &sgi->cfg.gtp_listenaddr.sin_addr, GTP_MODE_SGSN);
+	if (rc) {
+		LOGP(DGPRS, LOGL_ERROR, "Failed to create GTP: %d\n", rc);
+		return rc;
+	}
+	gsn = sgi->gsn;
+
+	sgi->gtp_fd0.fd = gsn->fd0;
+	sgi->gtp_fd0.priv_nr = 0;
+	sgi->gtp_fd0.data = sgi;
+	sgi->gtp_fd0.when = BSC_FD_READ;
+	sgi->gtp_fd0.cb = sgsn_gtp_fd_cb;
+	rc = bsc_register_fd(&sgi->gtp_fd0);
+	if (rc < 0)
+		return rc;
+
+	sgi->gtp_fd1c.fd = gsn->fd1c;
+	sgi->gtp_fd1c.priv_nr = 1;
+	sgi->gtp_fd1c.data = sgi;
+	sgi->gtp_fd1c.when = BSC_FD_READ;
+	sgi->gtp_fd1c.cb = sgsn_gtp_fd_cb;
+	bsc_register_fd(&sgi->gtp_fd1c);
+	if (rc < 0)
+		return rc;
+
+	sgi->gtp_fd1u.fd = gsn->fd1u;
+	sgi->gtp_fd1u.priv_nr = 2;
+	sgi->gtp_fd1u.data = sgi;
+	sgi->gtp_fd1u.when = BSC_FD_READ;
+	sgi->gtp_fd1u.cb = sgsn_gtp_fd_cb;
+	bsc_register_fd(&sgi->gtp_fd1u);
+	if (rc < 0)
+		return rc;
+
+	/* Start GTP re-transmission timer */
+	sgi->gtp_timer.cb = sgsn_gtp_tmr_cb;
+	sgi->gtp_timer.data = sgi;
+	sgsn_gtp_tmr_start(sgi);
+
+	/* Register callbackcs with libgtp */
+	gtp_set_cb_delete_context(gsn, cb_delete_context);
+	gtp_set_cb_conf(gsn, cb_conf);
+	gtp_set_cb_recovery(gsn, cb_recovery);
+	gtp_set_cb_data_ind(gsn, cb_data_ind);
+	gtp_set_cb_unsup_ind(gsn, cb_unsup_ind);
+	gtp_set_cb_extheader_ind(gsn, cb_extheader_ind);
+
+	return 0;
+}
diff --git a/src/gprs/sgsn_main.c b/src/gprs/sgsn_main.c
new file mode 100644
index 000000000..c59265fb4
--- /dev/null
+++ b/src/gprs/sgsn_main.c
@@ -0,0 +1,288 @@
+/* GPRS SGSN Implementation */
+
+/* (C) 2010 by Harald Welte <laforge@gnumonks.org>
+ * (C) 2010 by On-Waves
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <getopt.h>
+#include <errno.h>
+#include <signal.h>
+#include <sys/fcntl.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+#include <osmocore/talloc.h>
+#include <osmocore/select.h>
+#include <osmocore/rate_ctr.h>
+#include <osmocore/logging.h>
+#include <osmocore/process.h>
+
+#include <osmocom/vty/telnet_interface.h>
+
+#include <openbsc/signal.h>
+#include <openbsc/debug.h>
+#include <openbsc/vty.h>
+#include <openbsc/sgsn.h>
+#include <openbsc/gprs_ns.h>
+#include <openbsc/gprs_bssgp.h>
+#include <openbsc/gprs_llc.h>
+
+#include <gtp.h>
+
+#include "../../bscconfig.h"
+
+/* this is here for the vty... it will never be called */
+void subscr_put() { abort(); }
+
+#define _GNU_SOURCE
+#include <getopt.h>
+
+void *tall_bsc_ctx;
+
+struct gprs_ns_inst *sgsn_nsi;
+static struct log_target *stderr_target;
+static int daemonize = 0;
+const char *openbsc_copyright =
+	"Copyright (C) 2010 Harald Welte and On-Waves\r\n"
+	"License AGPLv3+: GNU AGPL version 2 or later <http://gnu.org/licenses/agpl-3.0.html>\r\n"
+	"This is free software: you are free to change and redistribute it.\r\n"
+	"There is NO WARRANTY, to the extent permitted by law.\r\n";
+
+static struct sgsn_instance sgsn_inst = {
+	.config_file = "osmo_sgsn.cfg",
+	.cfg = {
+		.gtp_statedir = "./",
+	},
+};
+struct sgsn_instance *sgsn = &sgsn_inst;
+
+/* call-back function for the NS protocol */
+static int sgsn_ns_cb(enum gprs_ns_evt event, struct gprs_nsvc *nsvc,
+		      struct msgb *msg, u_int16_t bvci)
+{
+	int rc = 0;
+
+	switch (event) {
+	case GPRS_NS_EVT_UNIT_DATA:
+		/* hand the message into the BSSGP implementation */
+		rc = gprs_bssgp_rcvmsg(msg);
+		break;
+	default:
+		LOGP(DGPRS, LOGL_ERROR, "SGSN: Unknown event %u from NS\n", event);
+		if (msg)
+			talloc_free(msg);
+		rc = -EIO;
+		break;
+	}
+	return rc;
+}
+
+static void signal_handler(int signal)
+{
+	fprintf(stdout, "signal %u received\n", signal);
+
+	switch (signal) {
+	case SIGINT:
+		dispatch_signal(SS_GLOBAL, S_GLOBAL_SHUTDOWN, NULL);
+		sleep(1);
+		exit(0);
+		break;
+	case SIGABRT:
+		/* in case of abort, we want to obtain a talloc report
+		 * and then return to the caller, who will abort the process */
+	case SIGUSR1:
+		talloc_report(tall_vty_ctx, stderr);
+		talloc_report_full(tall_bsc_ctx, stderr);
+		break;
+	case SIGUSR2:
+		talloc_report_full(tall_vty_ctx, stderr);
+		break;
+	default:
+		break;
+	}
+}
+
+/* NSI that BSSGP uses when transmitting on NS */
+extern struct gprs_ns_inst *bssgp_nsi;
+extern void *tall_msgb_ctx;
+
+extern enum node_type bsc_vty_go_parent(struct vty *vty);
+
+static struct vty_app_info vty_info = {
+	.name 		= "OsmoSGSN",
+	.version	= PACKAGE_VERSION,
+	.go_parent_cb	= bsc_vty_go_parent,
+	.is_config_node	= bsc_vty_is_config_node,
+};
+
+static void print_help(void)
+{
+	printf("Some useful help...\n");
+	printf("  -h --help\tthis text\n");
+	printf("  -D --daemonize\tFork the process into a background daemon\n");
+	printf("  -d option --debug\tenable Debugging\n");
+	printf("  -s --disable-color\n");
+	printf("  -c --config-file\tThe config file to use\n");
+	printf("  -e --log-level number\tSet a global log level\n");
+}
+
+static void handle_options(int argc, char **argv)
+{
+	while (1) {
+		int option_index = 0, c;
+		static struct option long_options[] = {
+			{"help", 0, 0, 'h'},
+			{"debug", 1, 0, 'd'},
+			{"daemonize", 0, 0, 'D'},
+			{"config-file", 1, 0, 'c'},
+			{"disable-color", 0, 0, 's'},
+			{"timestamp", 0, 0, 'T'},
+			{"log-level", 1, 0, 'e'},
+			{NULL, 0, 0, 0}
+		};
+
+		c = getopt_long(argc, argv, "hd:Dc:sTe:",
+				long_options, &option_index);
+		if (c == -1)
+			break;
+
+		switch (c) {
+		case 'h':
+			//print_usage();
+			print_help();
+			exit(0);
+		case 's':
+			log_set_use_color(stderr_target, 0);
+			break;
+		case 'd':
+			log_parse_category_mask(stderr_target, optarg);
+			break;
+		case 'D':
+			daemonize = 1;
+			break;
+		case 'c':
+			sgsn_inst.config_file = strdup(optarg);
+			break;
+		case 'T':
+			log_set_print_timestamp(stderr_target, 1);
+			break;
+		case 'e':
+			log_set_log_level(stderr_target, atoi(optarg));
+			break;
+		default:
+			/* ignore */
+			break;
+		}
+	}
+}
+
+int main(int argc, char **argv)
+{
+	struct gsm_network dummy_network;
+	struct sockaddr_in sin;
+	int rc;
+
+	tall_bsc_ctx = talloc_named_const(NULL, 0, "osmo_sgsn");
+	tall_msgb_ctx = talloc_named_const(tall_bsc_ctx, 0, "msgb");
+
+	signal(SIGINT, &signal_handler);
+	signal(SIGABRT, &signal_handler);
+	signal(SIGUSR1, &signal_handler);
+	signal(SIGUSR2, &signal_handler);
+	signal(SIGPIPE, SIG_IGN);
+
+	log_init(&log_info);
+	stderr_target = log_target_create_stderr();
+	log_add_target(stderr_target);
+	log_set_all_filter(stderr_target, 1);
+
+	vty_info.copyright = openbsc_copyright;
+	vty_init(&vty_info);
+	logging_vty_add_cmds();
+        sgsn_vty_init();
+
+	handle_options(argc, argv);
+
+	rate_ctr_init(tall_bsc_ctx);
+	rc = telnet_init(tall_bsc_ctx, &dummy_network, 4245);
+	if (rc < 0)
+		exit(1);
+
+	sgsn_nsi = gprs_ns_instantiate(&sgsn_ns_cb);
+	if (!sgsn_nsi) {
+		LOGP(DGPRS, LOGL_ERROR, "Unable to instantiate NS\n");
+		exit(1);
+	}
+	bssgp_nsi = sgsn_inst.cfg.nsi = sgsn_nsi;
+
+	gprs_llc_init("/usr/local/lib/osmocom/crypt/");
+
+	gprs_ns_vty_init(bssgp_nsi);
+	gprs_bssgp_vty_init();
+	gprs_llc_vty_init();
+	gprs_sndcp_vty_init();
+	/* FIXME: register signal handler for SS_NS */
+
+	rc = sgsn_parse_config(sgsn_inst.config_file, &sgsn_inst.cfg);
+	if (rc < 0) {
+		LOGP(DGPRS, LOGL_FATAL, "Cannot parse config file\n");
+		exit(2);
+	}
+
+	rc = sgsn_gtp_init(&sgsn_inst);
+	if (rc) {
+		LOGP(DGPRS, LOGL_FATAL, "Cannot bind/listen on GTP socket\n");
+		exit(2);
+	}
+
+	rc = gprs_ns_nsip_listen(sgsn_nsi);
+	if (rc < 0) {
+		LOGP(DGPRS, LOGL_FATAL, "Cannot bind/listen on NSIP socket\n");
+		exit(2);
+	}
+
+	rc = gprs_ns_frgre_listen(sgsn_nsi);
+	if (rc < 0) {
+		LOGP(DGPRS, LOGL_FATAL, "Cannot bind/listen GRE "
+			"socket. Do you have CAP_NET_RAW?\n");
+		exit(2);
+	}
+
+	if (daemonize) {
+		rc = osmo_daemonize();
+		if (rc < 0) {
+			perror("Error during daemonize");
+			exit(1);
+		}
+	}
+
+	while (1) {
+		rc = bsc_select_main(0);
+		if (rc < 0)
+			exit(3);
+	}
+
+	exit(0);
+}
diff --git a/src/gprs/sgsn_vty.c b/src/gprs/sgsn_vty.c
new file mode 100644
index 000000000..74669ffb7
--- /dev/null
+++ b/src/gprs/sgsn_vty.c
@@ -0,0 +1,357 @@
+/*
+ * (C) 2010 by Harald Welte <laforge@gnumonks.org>
+ * (C) 2010 by On-Waves
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+#include <osmocore/talloc.h>
+#include <osmocore/utils.h>
+#include <osmocore/rate_ctr.h>
+
+#include <openbsc/debug.h>
+#include <openbsc/sgsn.h>
+#include <openbsc/gprs_ns.h>
+#include <openbsc/gprs_sgsn.h>
+#include <openbsc/vty.h>
+#include <openbsc/gsm_04_08_gprs.h>
+
+#include <osmocom/vty/command.h>
+#include <osmocom/vty/vty.h>
+
+#include <pdp.h>
+
+static struct sgsn_config *g_cfg = NULL;
+
+
+#define GSM48_MAX_APN_LEN	102	/* 10.5.6.1 */
+static char *gprs_apn2str(uint8_t *apn, unsigned int len)
+{
+	static char apnbuf[GSM48_MAX_APN_LEN+1];
+	unsigned int i;
+
+	if (!apn)
+		return "";
+
+	if (len > sizeof(apnbuf)-1)
+		len = sizeof(apnbuf)-1;
+
+	memcpy(apnbuf, apn, len);
+	apnbuf[len] = '\0';
+
+	/* replace the domain name step sizes with dots */
+	while (i < len) {
+		unsigned int step = apnbuf[i];
+		apnbuf[i] = '.';
+		i += step+1;
+	}
+
+	return apnbuf+1;
+}
+
+static char *gprs_pdpaddr2str(uint8_t *pdpa, uint8_t len)
+{
+	static char str[INET6_ADDRSTRLEN + 10];
+
+	if (!pdpa || len < 2)
+		return "none";
+
+	switch (pdpa[0] & 0x0f) {
+	case PDP_TYPE_ORG_IETF:
+		switch (pdpa[1]) {
+		case PDP_TYPE_N_IETF_IPv4:
+			if (len < 2 + 4)
+				break;
+			strcpy(str, "IPv4 ");
+			inet_ntop(AF_INET, pdpa+2, str+5, sizeof(str)-5);
+			return str;
+		case PDP_TYPE_N_IETF_IPv6:
+			if (len < 2 + 8)
+				break;
+			strcpy(str, "IPv6 ");
+			inet_ntop(AF_INET6, pdpa+2, str+5, sizeof(str)-5);
+			return str;
+		default:
+			break;
+		}
+		break;
+	case PDP_TYPE_ORG_ETSI:
+		if (pdpa[1] == PDP_TYPE_N_ETSI_PPP)
+			return "PPP";
+		break;
+	default:
+		break;
+	}
+
+	return "invalid";
+}
+
+static struct cmd_node sgsn_node = {
+	SGSN_NODE,
+	"%s(sgsn)#",
+	1,
+};
+
+static int config_write_sgsn(struct vty *vty)
+{
+	struct sgsn_ggsn_ctx *gctx;
+
+	vty_out(vty, "sgsn%s", VTY_NEWLINE);
+
+	vty_out(vty, " gtp local-ip %s%s",
+		inet_ntoa(g_cfg->gtp_listenaddr.sin_addr), VTY_NEWLINE);
+
+	llist_for_each_entry(gctx, &sgsn_ggsn_ctxts, list) {
+		vty_out(vty, " ggsn %u remote-ip %s%s", gctx->id,
+			inet_ntoa(gctx->remote_addr), VTY_NEWLINE);
+		vty_out(vty, " ggsn %u gtp-version %u%s", gctx->id,
+			gctx->gtp_version, VTY_NEWLINE);
+	}
+
+	return CMD_SUCCESS;
+}
+
+#define SGSN_STR	"Configure the SGSN"
+
+DEFUN(cfg_sgsn, cfg_sgsn_cmd,
+	"sgsn",
+	SGSN_STR)
+{
+	vty->node = SGSN_NODE;
+	return CMD_SUCCESS;
+}
+
+DEFUN(cfg_sgsn_bind_addr, cfg_sgsn_bind_addr_cmd,
+	"gtp local-ip A.B.C.D",
+	"GTP Parameters\n"
+	"Set the IP address for the local GTP bind\n")
+{
+	inet_aton(argv[0], &g_cfg->gtp_listenaddr.sin_addr);
+
+	return CMD_SUCCESS;
+}
+
+DEFUN(cfg_ggsn_remote_ip, cfg_ggsn_remote_ip_cmd,
+	"ggsn <0-255> remote-ip A.B.C.D",
+	"")
+{
+	uint32_t id = atoi(argv[0]);
+	struct sgsn_ggsn_ctx *ggc = sgsn_ggsn_ctx_find_alloc(id);
+
+	inet_aton(argv[1], &ggc->remote_addr);
+
+	return CMD_SUCCESS;
+}
+
+#if 0
+DEFUN(cfg_ggsn_remote_port, cfg_ggsn_remote_port_cmd,
+	"ggsn <0-255> remote-port <0-65535>",
+	"")
+{
+	uint32_t id = atoi(argv[0]);
+	struct sgsn_ggsn_ctx *ggc = sgsn_ggsn_ctx_find_alloc(id);
+	uint16_t port = atoi(argv[1]);
+
+}
+#endif
+
+DEFUN(cfg_ggsn_gtp_version, cfg_ggsn_gtp_version_cmd,
+	"ggsn <0-255> gtp-version (0|1)",
+	"")
+{
+	uint32_t id = atoi(argv[0]);
+	struct sgsn_ggsn_ctx *ggc = sgsn_ggsn_ctx_find_alloc(id);
+
+	if (atoi(argv[1]))
+		ggc->gtp_version = 1;
+	else
+		ggc->gtp_version = 0;
+
+	return CMD_SUCCESS;
+}
+
+#if 0
+DEFUN(cfg_apn_ggsn, cfg_apn_ggsn_cmd,
+	"apn APNAME ggsn <0-255>",
+	"")
+{
+	struct apn_ctx **
+}
+#endif
+
+const struct value_string gprs_mm_st_strs[] = {
+	{ GMM_DEREGISTERED, "DEREGISTERED" },
+	{ GMM_COMMON_PROC_INIT, "COMMON PROCEDURE (INIT)" },
+	{ GMM_REGISTERED_NORMAL, "REGISTERED (NORMAL)" },
+	{ GMM_REGISTERED_SUSPENDED, "REGISTERED (SUSPENDED)" },
+	{ GMM_DEREGISTERED_INIT, "DEREGISTERED (INIT)" },
+	{ 0, NULL }
+};
+
+static void vty_dump_pdp(struct vty *vty, const char *pfx,
+			 struct sgsn_pdp_ctx *pdp)
+{
+	vty_out(vty, "%sPDP Context IMSI: %s, SAPI: %u, NSAPI: %u%s",
+		pfx, pdp->mm->imsi, pdp->sapi, pdp->nsapi, VTY_NEWLINE);
+	vty_out(vty, "%s  APN: %s%s", pfx,
+		gprs_apn2str(pdp->lib->apn_use.v, pdp->lib->apn_use.l),
+		VTY_NEWLINE);
+	vty_out(vty, "%s  PDP Address: %s%s", pfx,
+		gprs_pdpaddr2str(pdp->lib->eua.v, pdp->lib->eua.l),
+		VTY_NEWLINE);
+	vty_out_rate_ctr_group(vty, " ", pdp->ctrg);
+}
+
+static void vty_dump_mmctx(struct vty *vty, const char *pfx,
+			   struct sgsn_mm_ctx *mm, int pdp)
+{
+	vty_out(vty, "%sMM Context for IMSI %s, IMEI %s, P-TMSI %08x%s",
+		pfx, mm->imsi, mm->imei, mm->p_tmsi, VTY_NEWLINE);
+	vty_out(vty, "%s  MSISDN: %s, TLLI: %08x%s", pfx, mm->msisdn,
+		mm->tlli, VTY_NEWLINE);
+	vty_out(vty, "%s  MM State: %s, Routeing Area: %u-%u-%u-%u, "
+		"Cell ID: %u%s", pfx,
+		get_value_string(gprs_mm_st_strs, mm->mm_state),
+		mm->ra.mcc, mm->ra.mnc, mm->ra.lac, mm->ra.rac,
+		mm->cell_id, VTY_NEWLINE);
+
+	vty_out_rate_ctr_group(vty, " ", mm->ctrg);
+
+	if (pdp) {
+		struct sgsn_pdp_ctx *pdp;
+
+		llist_for_each_entry(pdp, &mm->pdp_list, list)
+			vty_dump_pdp(vty, "  ", pdp);
+	}
+}
+
+DEFUN(show_sgsn, show_sgsn_cmd, "show sgsn",
+      SHOW_STR "Display information about the SGSN")
+{
+	/* FIXME: statistics */
+	return CMD_SUCCESS;
+}
+
+#define MMCTX_STR "MM Context\n"
+#define INCLUDE_PDP_STR "Include PDP Context Information\n"
+
+#if 0
+DEFUN(show_mmctx_tlli, show_mmctx_tlli_cmd,
+	"show mm-context tlli HEX [pdp]",
+	SHOW_STR MMCTX_STR "Identify by TLLI\n" "TLLI\n" INCLUDE_PDP_STR)
+{
+	uint32_t tlli;
+	struct sgsn_mm_ctx *mm;
+
+	tlli = strtoul(argv[0], NULL, 16);
+	mm = sgsn_mm_ctx_by_tlli(tlli);
+	if (!mm) {
+		vty_out(vty, "No MM context for TLLI %08x%s",
+			tlli, VTY_NEWLINE);
+		return CMD_WARNING;
+	}
+	vty_dump_mmctx(vty, "", mm, argv[1] ? 1 : 0);
+	return CMD_SUCCESS;
+}
+#endif
+
+DEFUN(swow_mmctx_imsi, show_mmctx_imsi_cmd,
+	"show mm-context imsi IMSI [pdp]",
+	SHOW_STR MMCTX_STR "Identify by IMSI\n" "IMSI of the MM Context\n"
+	INCLUDE_PDP_STR)
+{
+	struct sgsn_mm_ctx *mm;
+
+	mm = sgsn_mm_ctx_by_imsi(argv[0]);
+	if (!mm) {
+		vty_out(vty, "No MM context for IMSI %s%s",
+			argv[0], VTY_NEWLINE);
+		return CMD_WARNING;
+	}
+	vty_dump_mmctx(vty, "", mm, argv[1] ? 1 : 0);
+	return CMD_SUCCESS;
+}
+
+DEFUN(swow_mmctx_all, show_mmctx_all_cmd,
+	"show mm-context all [pdp]",
+	SHOW_STR MMCTX_STR "All MM Contexts\n" INCLUDE_PDP_STR)
+{
+	struct sgsn_mm_ctx *mm;
+
+	llist_for_each_entry(mm, &sgsn_mm_ctxts, list)
+		vty_dump_mmctx(vty, "", mm, argv[0] ? 1 : 0);
+
+	return CMD_SUCCESS;
+}
+
+DEFUN(show_ggsn, show_ggsn_cmd,
+	"show ggsn",
+	"")
+{
+
+}
+
+DEFUN(show_pdpctx_all, show_pdpctx_all_cmd,
+	"show pdp-context all",
+	SHOW_STR "Display information on PDP Context\n")
+{
+	struct sgsn_pdp_ctx *pdp;
+
+	llist_for_each_entry(pdp, &sgsn_pdp_ctxts, g_list)
+		vty_dump_pdp(vty, "", pdp);
+
+	return CMD_SUCCESS;
+}
+
+int sgsn_vty_init(void)
+{
+	install_element_ve(&show_sgsn_cmd);
+	//install_element_ve(&show_mmctx_tlli_cmd);
+	install_element_ve(&show_mmctx_imsi_cmd);
+	install_element_ve(&show_mmctx_all_cmd);
+	install_element_ve(&show_pdpctx_all_cmd);
+
+	install_element(CONFIG_NODE, &cfg_sgsn_cmd);
+	install_node(&sgsn_node, config_write_sgsn);
+	install_default(SGSN_NODE);
+	install_element(SGSN_NODE, &ournode_exit_cmd);
+	install_element(SGSN_NODE, &ournode_end_cmd);
+	install_element(SGSN_NODE, &cfg_sgsn_bind_addr_cmd);
+	install_element(SGSN_NODE, &cfg_ggsn_remote_ip_cmd);
+	//install_element(SGSN_NODE, &cfg_ggsn_remote_port_cmd);
+	install_element(SGSN_NODE, &cfg_ggsn_gtp_version_cmd);
+
+	return 0;
+}
+
+int sgsn_parse_config(const char *config_file, struct sgsn_config *cfg)
+{
+	int rc;
+
+	g_cfg = cfg;
+	rc = vty_read_config_file(config_file, NULL);
+	if (rc < 0) {
+		fprintf(stderr, "Failed to parse the config file: '%s'\n", config_file);
+		return rc;
+	}
+
+	return 0;
+}
diff --git a/src/ipaccess/Makefile.am b/src/ipaccess/Makefile.am
new file mode 100644
index 000000000..144cca1ee
--- /dev/null
+++ b/src/ipaccess/Makefile.am
@@ -0,0 +1,21 @@
+INCLUDES = $(all_includes) -I$(top_srcdir)/include -I$(top_builddir)
+AM_CFLAGS=-Wall $(LIBOSMOCORE_CFLAGS) $(COVERAGE_CFLAGS)
+AM_LDFLAGS = $(LIBOSMOCORE_LIBS) $(COVERAGE_LDFLAGS)
+
+bin_PROGRAMS = ipaccess-find ipaccess-config ipaccess-proxy
+
+ipaccess_find_SOURCES = ipaccess-find.c
+
+ipaccess_config_SOURCES = ipaccess-config.c ipaccess-firmware.c network_listen.c
+
+# FIXME: resolve the bogus dependencies patched around here:
+ipaccess_config_LDADD = $(top_builddir)/src/libbsc/libbsc.a \
+			$(top_builddir)/src/libmsc/libmsc.a \
+			$(top_builddir)/src/libabis/libabis.a \
+			$(top_builddir)/src/libbsc/libbsc.a \
+			$(top_builddir)/src/libtrau/libtrau.a \
+			$(top_builddir)/src/libcommon/libcommon.a \
+			-ldl -ldbi $(LIBCRYPT)
+
+ipaccess_proxy_SOURCES = ipaccess-proxy.c
+ipaccess_proxy_LDADD = $(top_builddir)/src/libcommon/libcommon.a
diff --git a/src/ipaccess/Makefile.in b/src/ipaccess/Makefile.in
new file mode 100644
index 000000000..864fa316d
--- /dev/null
+++ b/src/ipaccess/Makefile.in
@@ -0,0 +1,520 @@
+# Makefile.in generated by automake 1.11.1 from Makefile.am.
+# @configure_input@
+
+# Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
+# 2003, 2004, 2005, 2006, 2007, 2008, 2009  Free Software Foundation,
+# Inc.
+# This Makefile.in is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
+# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+# PARTICULAR PURPOSE.
+
+@SET_MAKE@
+
+VPATH = @srcdir@
+pkgdatadir = $(datadir)/@PACKAGE@
+pkgincludedir = $(includedir)/@PACKAGE@
+pkglibdir = $(libdir)/@PACKAGE@
+pkglibexecdir = $(libexecdir)/@PACKAGE@
+am__cd = CDPATH="$${ZSH_VERSION+.}$(PATH_SEPARATOR)" && cd
+install_sh_DATA = $(install_sh) -c -m 644
+install_sh_PROGRAM = $(install_sh) -c
+install_sh_SCRIPT = $(install_sh) -c
+INSTALL_HEADER = $(INSTALL_DATA)
+transform = $(program_transform_name)
+NORMAL_INSTALL = :
+PRE_INSTALL = :
+POST_INSTALL = :
+NORMAL_UNINSTALL = :
+PRE_UNINSTALL = :
+POST_UNINSTALL = :
+bin_PROGRAMS = ipaccess-find$(EXEEXT) ipaccess-config$(EXEEXT) \
+	ipaccess-proxy$(EXEEXT)
+subdir = src/ipaccess
+DIST_COMMON = $(srcdir)/Makefile.am $(srcdir)/Makefile.in
+ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
+am__aclocal_m4_deps = $(top_srcdir)/configure.in
+am__configure_deps = $(am__aclocal_m4_deps) $(CONFIGURE_DEPENDENCIES) \
+	$(ACLOCAL_M4)
+mkinstalldirs = $(install_sh) -d
+CONFIG_HEADER = $(top_builddir)/bscconfig.h
+CONFIG_CLEAN_FILES =
+CONFIG_CLEAN_VPATH_FILES =
+am__installdirs = "$(DESTDIR)$(bindir)"
+PROGRAMS = $(bin_PROGRAMS)
+am_ipaccess_config_OBJECTS = ipaccess-config.$(OBJEXT) \
+	ipaccess-firmware.$(OBJEXT) network_listen.$(OBJEXT)
+ipaccess_config_OBJECTS = $(am_ipaccess_config_OBJECTS)
+ipaccess_config_DEPENDENCIES = $(top_builddir)/src/libbsc/libbsc.a \
+	$(top_builddir)/src/libmsc/libmsc.a \
+	$(top_builddir)/src/libabis/libabis.a \
+	$(top_builddir)/src/libbsc/libbsc.a \
+	$(top_builddir)/src/libtrau/libtrau.a \
+	$(top_builddir)/src/libcommon/libcommon.a
+am_ipaccess_find_OBJECTS = ipaccess-find.$(OBJEXT)
+ipaccess_find_OBJECTS = $(am_ipaccess_find_OBJECTS)
+ipaccess_find_LDADD = $(LDADD)
+am_ipaccess_proxy_OBJECTS = ipaccess-proxy.$(OBJEXT)
+ipaccess_proxy_OBJECTS = $(am_ipaccess_proxy_OBJECTS)
+ipaccess_proxy_DEPENDENCIES =  \
+	$(top_builddir)/src/libcommon/libcommon.a
+DEFAULT_INCLUDES = -I.@am__isrc@ -I$(top_builddir)
+depcomp = $(SHELL) $(top_srcdir)/depcomp
+am__depfiles_maybe = depfiles
+am__mv = mv -f
+COMPILE = $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) \
+	$(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS)
+AM_V_CC = $(am__v_CC_$(V))
+am__v_CC_ = $(am__v_CC_$(AM_DEFAULT_VERBOSITY))
+am__v_CC_0 = @echo "  CC    " $@;
+AM_V_at = $(am__v_at_$(V))
+am__v_at_ = $(am__v_at_$(AM_DEFAULT_VERBOSITY))
+am__v_at_0 = @
+CCLD = $(CC)
+LINK = $(CCLD) $(AM_CFLAGS) $(CFLAGS) $(AM_LDFLAGS) $(LDFLAGS) -o $@
+AM_V_CCLD = $(am__v_CCLD_$(V))
+am__v_CCLD_ = $(am__v_CCLD_$(AM_DEFAULT_VERBOSITY))
+am__v_CCLD_0 = @echo "  CCLD  " $@;
+AM_V_GEN = $(am__v_GEN_$(V))
+am__v_GEN_ = $(am__v_GEN_$(AM_DEFAULT_VERBOSITY))
+am__v_GEN_0 = @echo "  GEN   " $@;
+SOURCES = $(ipaccess_config_SOURCES) $(ipaccess_find_SOURCES) \
+	$(ipaccess_proxy_SOURCES)
+DIST_SOURCES = $(ipaccess_config_SOURCES) $(ipaccess_find_SOURCES) \
+	$(ipaccess_proxy_SOURCES)
+ETAGS = etags
+CTAGS = ctags
+DISTFILES = $(DIST_COMMON) $(DIST_SOURCES) $(TEXINFOS) $(EXTRA_DIST)
+ACLOCAL = @ACLOCAL@
+AMTAR = @AMTAR@
+AM_DEFAULT_VERBOSITY = @AM_DEFAULT_VERBOSITY@
+AUTOCONF = @AUTOCONF@
+AUTOHEADER = @AUTOHEADER@
+AUTOMAKE = @AUTOMAKE@
+AWK = @AWK@
+CC = @CC@
+CCDEPMODE = @CCDEPMODE@
+CFLAGS = @CFLAGS@
+COVERAGE_CFLAGS = @COVERAGE_CFLAGS@
+COVERAGE_LDFLAGS = @COVERAGE_LDFLAGS@
+CPP = @CPP@
+CPPFLAGS = @CPPFLAGS@
+CYGPATH_W = @CYGPATH_W@
+DEFS = @DEFS@
+DEPDIR = @DEPDIR@
+ECHO_C = @ECHO_C@
+ECHO_N = @ECHO_N@
+ECHO_T = @ECHO_T@
+EGREP = @EGREP@
+EXEEXT = @EXEEXT@
+GPRS_LIBGTP = @GPRS_LIBGTP@
+GREP = @GREP@
+INSTALL = @INSTALL@
+INSTALL_DATA = @INSTALL_DATA@
+INSTALL_PROGRAM = @INSTALL_PROGRAM@
+INSTALL_SCRIPT = @INSTALL_SCRIPT@
+INSTALL_STRIP_PROGRAM = @INSTALL_STRIP_PROGRAM@
+LDFLAGS = @LDFLAGS@
+LIBOBJS = @LIBOBJS@
+LIBOSMOCORE_CFLAGS = @LIBOSMOCORE_CFLAGS@
+LIBOSMOCORE_LIBS = @LIBOSMOCORE_LIBS@
+LIBOSMOSCCP_CFLAGS = @LIBOSMOSCCP_CFLAGS@
+LIBOSMOSCCP_LIBS = @LIBOSMOSCCP_LIBS@
+LIBOSMOVTY_CFLAGS = @LIBOSMOVTY_CFLAGS@
+LIBOSMOVTY_LIBS = @LIBOSMOVTY_LIBS@
+LIBS = @LIBS@
+LTLIBOBJS = @LTLIBOBJS@
+MAKEINFO = @MAKEINFO@
+MKDIR_P = @MKDIR_P@
+OBJEXT = @OBJEXT@
+PACKAGE = @PACKAGE@
+PACKAGE_BUGREPORT = @PACKAGE_BUGREPORT@
+PACKAGE_NAME = @PACKAGE_NAME@
+PACKAGE_STRING = @PACKAGE_STRING@
+PACKAGE_TARNAME = @PACKAGE_TARNAME@
+PACKAGE_URL = @PACKAGE_URL@
+PACKAGE_VERSION = @PACKAGE_VERSION@
+PATH_SEPARATOR = @PATH_SEPARATOR@
+PKG_CONFIG = @PKG_CONFIG@
+PKG_CONFIG_LIBDIR = @PKG_CONFIG_LIBDIR@
+PKG_CONFIG_PATH = @PKG_CONFIG_PATH@
+RANLIB = @RANLIB@
+SET_MAKE = @SET_MAKE@
+SHELL = @SHELL@
+STRIP = @STRIP@
+SYMBOL_VISIBILITY = @SYMBOL_VISIBILITY@
+VERSION = @VERSION@
+abs_builddir = @abs_builddir@
+abs_srcdir = @abs_srcdir@
+abs_top_builddir = @abs_top_builddir@
+abs_top_srcdir = @abs_top_srcdir@
+ac_ct_CC = @ac_ct_CC@
+am__include = @am__include@
+am__leading_dot = @am__leading_dot@
+am__quote = @am__quote@
+am__tar = @am__tar@
+am__untar = @am__untar@
+bindir = @bindir@
+build_alias = @build_alias@
+builddir = @builddir@
+datadir = @datadir@
+datarootdir = @datarootdir@
+docdir = @docdir@
+dvidir = @dvidir@
+exec_prefix = @exec_prefix@
+host_alias = @host_alias@
+htmldir = @htmldir@
+includedir = @includedir@
+infodir = @infodir@
+install_sh = @install_sh@
+libdir = @libdir@
+libexecdir = @libexecdir@
+localedir = @localedir@
+localstatedir = @localstatedir@
+mandir = @mandir@
+mkdir_p = @mkdir_p@
+oldincludedir = @oldincludedir@
+pdfdir = @pdfdir@
+prefix = @prefix@
+program_transform_name = @program_transform_name@
+psdir = @psdir@
+sbindir = @sbindir@
+sharedstatedir = @sharedstatedir@
+srcdir = @srcdir@
+sysconfdir = @sysconfdir@
+target_alias = @target_alias@
+top_build_prefix = @top_build_prefix@
+top_builddir = @top_builddir@
+top_srcdir = @top_srcdir@
+INCLUDES = $(all_includes) -I$(top_srcdir)/include -I$(top_builddir)
+AM_CFLAGS = -Wall $(LIBOSMOCORE_CFLAGS) $(COVERAGE_CFLAGS)
+AM_LDFLAGS = $(LIBOSMOCORE_LIBS) $(COVERAGE_LDFLAGS)
+ipaccess_find_SOURCES = ipaccess-find.c
+ipaccess_config_SOURCES = ipaccess-config.c ipaccess-firmware.c network_listen.c
+
+# FIXME: resolve the bogus dependencies patched around here:
+ipaccess_config_LDADD = $(top_builddir)/src/libbsc/libbsc.a \
+			$(top_builddir)/src/libmsc/libmsc.a \
+			$(top_builddir)/src/libabis/libabis.a \
+			$(top_builddir)/src/libbsc/libbsc.a \
+			$(top_builddir)/src/libtrau/libtrau.a \
+			$(top_builddir)/src/libcommon/libcommon.a \
+			-ldl -ldbi $(LIBCRYPT)
+
+ipaccess_proxy_SOURCES = ipaccess-proxy.c
+ipaccess_proxy_LDADD = $(top_builddir)/src/libcommon/libcommon.a
+all: all-am
+
+.SUFFIXES:
+.SUFFIXES: .c .o .obj
+$(srcdir)/Makefile.in:  $(srcdir)/Makefile.am  $(am__configure_deps)
+	@for dep in $?; do \
+	  case '$(am__configure_deps)' in \
+	    *$$dep*) \
+	      ( cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh ) \
+	        && { if test -f $@; then exit 0; else break; fi; }; \
+	      exit 1;; \
+	  esac; \
+	done; \
+	echo ' cd $(top_srcdir) && $(AUTOMAKE) --gnu src/ipaccess/Makefile'; \
+	$(am__cd) $(top_srcdir) && \
+	  $(AUTOMAKE) --gnu src/ipaccess/Makefile
+.PRECIOUS: Makefile
+Makefile: $(srcdir)/Makefile.in $(top_builddir)/config.status
+	@case '$?' in \
+	  *config.status*) \
+	    cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh;; \
+	  *) \
+	    echo ' cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__depfiles_maybe)'; \
+	    cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__depfiles_maybe);; \
+	esac;
+
+$(top_builddir)/config.status: $(top_srcdir)/configure $(CONFIG_STATUS_DEPENDENCIES)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+
+$(top_srcdir)/configure:  $(am__configure_deps)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+$(ACLOCAL_M4):  $(am__aclocal_m4_deps)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+$(am__aclocal_m4_deps):
+install-binPROGRAMS: $(bin_PROGRAMS)
+	@$(NORMAL_INSTALL)
+	test -z "$(bindir)" || $(MKDIR_P) "$(DESTDIR)$(bindir)"
+	@list='$(bin_PROGRAMS)'; test -n "$(bindir)" || list=; \
+	for p in $$list; do echo "$$p $$p"; done | \
+	sed 's/$(EXEEXT)$$//' | \
+	while read p p1; do if test -f $$p; \
+	  then echo "$$p"; echo "$$p"; else :; fi; \
+	done | \
+	sed -e 'p;s,.*/,,;n;h' -e 's|.*|.|' \
+	    -e 'p;x;s,.*/,,;s/$(EXEEXT)$$//;$(transform);s/$$/$(EXEEXT)/' | \
+	sed 'N;N;N;s,\n, ,g' | \
+	$(AWK) 'BEGIN { files["."] = ""; dirs["."] = 1 } \
+	  { d=$$3; if (dirs[d] != 1) { print "d", d; dirs[d] = 1 } \
+	    if ($$2 == $$4) files[d] = files[d] " " $$1; \
+	    else { print "f", $$3 "/" $$4, $$1; } } \
+	  END { for (d in files) print "f", d, files[d] }' | \
+	while read type dir files; do \
+	    if test "$$dir" = .; then dir=; else dir=/$$dir; fi; \
+	    test -z "$$files" || { \
+	      echo " $(INSTALL_PROGRAM_ENV) $(INSTALL_PROGRAM) $$files '$(DESTDIR)$(bindir)$$dir'"; \
+	      $(INSTALL_PROGRAM_ENV) $(INSTALL_PROGRAM) $$files "$(DESTDIR)$(bindir)$$dir" || exit $$?; \
+	    } \
+	; done
+
+uninstall-binPROGRAMS:
+	@$(NORMAL_UNINSTALL)
+	@list='$(bin_PROGRAMS)'; test -n "$(bindir)" || list=; \
+	files=`for p in $$list; do echo "$$p"; done | \
+	  sed -e 'h;s,^.*/,,;s/$(EXEEXT)$$//;$(transform)' \
+	      -e 's/$$/$(EXEEXT)/' `; \
+	test -n "$$list" || exit 0; \
+	echo " ( cd '$(DESTDIR)$(bindir)' && rm -f" $$files ")"; \
+	cd "$(DESTDIR)$(bindir)" && rm -f $$files
+
+clean-binPROGRAMS:
+	-test -z "$(bin_PROGRAMS)" || rm -f $(bin_PROGRAMS)
+ipaccess-config$(EXEEXT): $(ipaccess_config_OBJECTS) $(ipaccess_config_DEPENDENCIES) 
+	@rm -f ipaccess-config$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(ipaccess_config_OBJECTS) $(ipaccess_config_LDADD) $(LIBS)
+ipaccess-find$(EXEEXT): $(ipaccess_find_OBJECTS) $(ipaccess_find_DEPENDENCIES) 
+	@rm -f ipaccess-find$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(ipaccess_find_OBJECTS) $(ipaccess_find_LDADD) $(LIBS)
+ipaccess-proxy$(EXEEXT): $(ipaccess_proxy_OBJECTS) $(ipaccess_proxy_DEPENDENCIES) 
+	@rm -f ipaccess-proxy$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(ipaccess_proxy_OBJECTS) $(ipaccess_proxy_LDADD) $(LIBS)
+
+mostlyclean-compile:
+	-rm -f *.$(OBJEXT)
+
+distclean-compile:
+	-rm -f *.tab.c
+
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/ipaccess-config.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/ipaccess-find.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/ipaccess-firmware.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/ipaccess-proxy.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/network_listen.Po@am__quote@
+
+.c.o:
+@am__fastdepCC_TRUE@	$(AM_V_CC)$(COMPILE) -MT $@ -MD -MP -MF $(DEPDIR)/$*.Tpo -c -o $@ $<
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+
+.c.obj:
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+
+ID: $(HEADERS) $(SOURCES) $(LISP) $(TAGS_FILES)
+	list='$(SOURCES) $(HEADERS) $(LISP) $(TAGS_FILES)'; \
+	unique=`for i in $$list; do \
+	    if test -f "$$i"; then echo $$i; else echo $(srcdir)/$$i; fi; \
+	  done | \
+	  $(AWK) '{ files[$$0] = 1; nonempty = 1; } \
+	      END { if (nonempty) { for (i in files) print i; }; }'`; \
+	mkid -fID $$unique
+tags: TAGS
+
+TAGS:  $(HEADERS) $(SOURCES)  $(TAGS_DEPENDENCIES) \
+		$(TAGS_FILES) $(LISP)
+	set x; \
+	here=`pwd`; \
+	list='$(SOURCES) $(HEADERS)  $(LISP) $(TAGS_FILES)'; \
+	unique=`for i in $$list; do \
+	    if test -f "$$i"; then echo $$i; else echo $(srcdir)/$$i; fi; \
+	  done | \
+	  $(AWK) '{ files[$$0] = 1; nonempty = 1; } \
+	      END { if (nonempty) { for (i in files) print i; }; }'`; \
+	shift; \
+	if test -z "$(ETAGS_ARGS)$$*$$unique"; then :; else \
+	  test -n "$$unique" || unique=$$empty_fix; \
+	  if test $$# -gt 0; then \
+	    $(ETAGS) $(ETAGSFLAGS) $(AM_ETAGSFLAGS) $(ETAGS_ARGS) \
+	      "$$@" $$unique; \
+	  else \
+	    $(ETAGS) $(ETAGSFLAGS) $(AM_ETAGSFLAGS) $(ETAGS_ARGS) \
+	      $$unique; \
+	  fi; \
+	fi
+ctags: CTAGS
+CTAGS:  $(HEADERS) $(SOURCES)  $(TAGS_DEPENDENCIES) \
+		$(TAGS_FILES) $(LISP)
+	list='$(SOURCES) $(HEADERS)  $(LISP) $(TAGS_FILES)'; \
+	unique=`for i in $$list; do \
+	    if test -f "$$i"; then echo $$i; else echo $(srcdir)/$$i; fi; \
+	  done | \
+	  $(AWK) '{ files[$$0] = 1; nonempty = 1; } \
+	      END { if (nonempty) { for (i in files) print i; }; }'`; \
+	test -z "$(CTAGS_ARGS)$$unique" \
+	  || $(CTAGS) $(CTAGSFLAGS) $(AM_CTAGSFLAGS) $(CTAGS_ARGS) \
+	     $$unique
+
+GTAGS:
+	here=`$(am__cd) $(top_builddir) && pwd` \
+	  && $(am__cd) $(top_srcdir) \
+	  && gtags -i $(GTAGS_ARGS) "$$here"
+
+distclean-tags:
+	-rm -f TAGS ID GTAGS GRTAGS GSYMS GPATH tags
+
+distdir: $(DISTFILES)
+	@srcdirstrip=`echo "$(srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
+	topsrcdirstrip=`echo "$(top_srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
+	list='$(DISTFILES)'; \
+	  dist_files=`for file in $$list; do echo $$file; done | \
+	  sed -e "s|^$$srcdirstrip/||;t" \
+	      -e "s|^$$topsrcdirstrip/|$(top_builddir)/|;t"`; \
+	case $$dist_files in \
+	  */*) $(MKDIR_P) `echo "$$dist_files" | \
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+	for file in $$dist_files; do \
+	  if test -f $$file || test -d $$file; then d=.; else d=$(srcdir); fi; \
+	  if test -d $$d/$$file; then \
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+	    if test -d "$(distdir)/$$file"; then \
+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
+	    if test -d $(srcdir)/$$file && test $$d != $(srcdir); then \
+	      cp -fpR $(srcdir)/$$file "$(distdir)$$dir" || exit 1; \
+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
+	    cp -fpR $$d/$$file "$(distdir)$$dir" || exit 1; \
+	  else \
+	    test -f "$(distdir)/$$file" \
+	    || cp -p $$d/$$file "$(distdir)/$$file" \
+	    || exit 1; \
+	  fi; \
+	done
+check-am: all-am
+check: check-am
+all-am: Makefile $(PROGRAMS)
+installdirs:
+	for dir in "$(DESTDIR)$(bindir)"; do \
+	  test -z "$$dir" || $(MKDIR_P) "$$dir"; \
+	done
+install: install-am
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+install-am: all-am
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+	$(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	  install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	  `test -z '$(STRIP)' || \
+	    echo "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'"` install
+mostlyclean-generic:
+
+clean-generic:
+
+distclean-generic:
+	-test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
+	-test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
+
+maintainer-clean-generic:
+	@echo "This command is intended for maintainers to use"
+	@echo "it deletes files that may require special tools to rebuild."
+clean: clean-am
+
+clean-am: clean-binPROGRAMS clean-generic mostlyclean-am
+
+distclean: distclean-am
+	-rm -rf ./$(DEPDIR)
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+	distclean-tags
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+dvi: dvi-am
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+dvi-am:
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+maintainer-clean: maintainer-clean-am
+	-rm -rf ./$(DEPDIR)
+	-rm -f Makefile
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+
+mostlyclean: mostlyclean-am
+
+mostlyclean-am: mostlyclean-compile mostlyclean-generic
+
+pdf: pdf-am
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+.MAKE: install-am install-strip
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+.PHONY: CTAGS GTAGS all all-am check check-am clean clean-binPROGRAMS \
+	clean-generic ctags distclean distclean-compile \
+	distclean-generic distclean-tags distdir dvi dvi-am html \
+	html-am info info-am install install-am install-binPROGRAMS \
+	install-data install-data-am install-dvi install-dvi-am \
+	install-exec install-exec-am install-html install-html-am \
+	install-info install-info-am install-man install-pdf \
+	install-pdf-am install-ps install-ps-am install-strip \
+	installcheck installcheck-am installdirs maintainer-clean \
+	maintainer-clean-generic mostlyclean mostlyclean-compile \
+	mostlyclean-generic pdf pdf-am ps ps-am tags uninstall \
+	uninstall-am uninstall-binPROGRAMS
+
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/src/ipaccess/ipaccess-config.c b/src/ipaccess/ipaccess-config.c
new file mode 100644
index 000000000..d02faea3a
--- /dev/null
+++ b/src/ipaccess/ipaccess-config.c
@@ -0,0 +1,865 @@
+/* ip.access nanoBTS configuration tool */
+
+/* (C) 2009-2010 by Harald Welte <laforge@gnumonks.org>
+ * (C) 2009-2010 by Holger Hans Peter Freyther
+ * (C) 2009-2010 by On-Waves
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <getopt.h>
+#include <errno.h>
+#include <sys/fcntl.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+
+#include <osmocore/select.h>
+#include <osmocore/timer.h>
+#include <openbsc/ipaccess.h>
+#include <openbsc/gsm_data.h>
+#include <openbsc/e1_input.h>
+#include <openbsc/abis_nm.h>
+#include <openbsc/signal.h>
+#include <openbsc/debug.h>
+#include <openbsc/network_listen.h>
+#include <osmocore/talloc.h>
+
+static struct gsm_network *gsmnet;
+
+static int net_listen_testnr;
+static int restart;
+static char *prim_oml_ip;
+static char *bts_ip_addr, *bts_ip_mask, *bts_ip_gw;
+static char *unit_id;
+static u_int16_t nv_flags;
+static u_int16_t nv_mask;
+static char *software = NULL;
+static int sw_load_state = 0;
+static int oml_state = 0;
+static int dump_files = 0;
+static char *firmware_analysis = NULL;
+static int found_trx = 0;
+
+struct sw_load {
+	u_int8_t file_id[255];
+	u_int8_t file_id_len;
+
+	u_int8_t file_version[255];
+	u_int8_t file_version_len;
+};
+
+static void *tall_ctx_config = NULL;
+static struct sw_load *sw_load1 = NULL;
+static struct sw_load *sw_load2 = NULL;
+
+/*
+static u_int8_t prim_oml_attr[] = { 0x95, 0x00, 7, 0x88, 192, 168, 100, 11, 0x00, 0x00 };
+static u_int8_t unit_id_attr[] = { 0x91, 0x00, 9, '2', '3', '4', '2', '/' , '0', '/', '0', 0x00 };
+*/
+
+/*
+ * Callback function for NACK on the OML NM
+ *
+ * Currently we send the config requests but don't check the
+ * result. The nanoBTS will send us a NACK when we did something the
+ * BTS didn't like.
+ */
+static int ipacc_msg_nack(u_int8_t mt)
+{
+	fprintf(stderr, "Failure to set attribute. This seems fatal\n");
+	exit(-1);
+	return 0;
+}
+
+static void check_restart_or_exit(struct gsm_bts_trx *trx)
+{
+	if (restart) {
+		abis_nm_ipaccess_restart(trx);
+	} else {
+		exit(0);
+	}
+}
+
+static int ipacc_msg_ack(u_int8_t mt, struct gsm_bts_trx *trx)
+{
+	if (sw_load_state == 1) {
+		fprintf(stderr, "The new software is activaed.\n");
+		check_restart_or_exit(trx);
+	} else if (oml_state == 1) {
+		fprintf(stderr, "Set the NV Attributes.\n");
+		check_restart_or_exit(trx);
+	}
+
+	return 0;
+}
+
+static const uint8_t phys_conf_min[] = { 0x02 };
+
+static uint16_t build_physconf(uint8_t *physconf_buf, const struct rxlev_stats *st)
+{
+	uint16_t *whitelist = (uint16_t *) (physconf_buf + 4);
+	int num_arfcn;
+	unsigned int arfcnlist_size;
+
+	/* Create whitelist from rxlevels */
+	physconf_buf[0] = phys_conf_min[0];
+	physconf_buf[1] = NM_IPAC_EIE_ARFCN_WHITE;
+	num_arfcn = ipac_rxlevstat2whitelist(whitelist, st, 0, 100);
+	arfcnlist_size = num_arfcn * 2;
+	*((uint16_t *) (physconf_buf+2)) = htons(arfcnlist_size);
+	DEBUGP(DNM, "physconf_buf (%s)\n", hexdump(physconf_buf, arfcnlist_size+4));
+	return arfcnlist_size+4;
+}
+
+static int nwl_sig_cb(unsigned int subsys, unsigned int signal,
+		      void *handler_data, void *signal_data)
+{
+	struct gsm_bts_trx *trx;
+	uint8_t physconf_buf[2*NUM_ARFCNS+16];
+	uint16_t physconf_len;
+
+	switch (signal) {
+	case S_IPAC_NWL_COMPLETE:
+		trx = signal_data;
+		DEBUGP(DNM, "received S_IPAC_NWL_COMPLETE signal\n");
+		switch (trx->ipaccess.test_nr) {
+		case NM_IPACC_TESTNO_CHAN_USAGE:
+			/* Dump RxLev results */
+			//rxlev_stat_dump(&trx->ipaccess.rxlev_stat);
+			/* Create whitelist from results */
+			physconf_len = build_physconf(physconf_buf,
+						      &trx->ipaccess.rxlev_stat);
+			/* Start next test abbout BCCH channel usage */
+			ipac_nwl_test_start(trx, NM_IPACC_TESTNO_BCCH_CHAN_USAGE,
+					    physconf_buf, physconf_len);
+			break;
+		case NM_IPACC_TESTNO_BCCH_CHAN_USAGE:
+			/* Dump BCCH RxLev results */
+			//rxlev_stat_dump(&trx->ipaccess.rxlev_stat);
+			/* Create whitelist from results */
+			physconf_len = build_physconf(physconf_buf,
+						      &trx->ipaccess.rxlev_stat);
+			/* Start next test about BCCH info */
+			ipac_nwl_test_start(trx, NM_IPACC_TESTNO_BCCH_INFO,
+					    physconf_buf, physconf_len);
+			break;
+		case NM_IPACC_TESTNO_BCCH_INFO:
+#if 0
+			/* re-start full process with CHAN_USAGE */
+			DEBUGP(DNM, "starting next test cycle\n");
+			ipac_nwl_test_start(trx, net_listen_testnr, phys_conf_min,
+					    sizeof(phys_conf_min));
+#else
+			exit(0);
+#endif
+			break;
+		}
+		break;
+	}
+	return 0;
+}
+
+static int nm_state_event(int evt, u_int8_t obj_class, void *obj,
+			  struct gsm_nm_state *old_state, struct gsm_nm_state *new_state,
+			  struct abis_om_obj_inst *obj_inst);
+
+static int nm_sig_cb(unsigned int subsys, unsigned int signal,
+		     void *handler_data, void *signal_data)
+{
+	struct ipacc_ack_signal_data *ipacc_data;
+	struct nm_statechg_signal_data *nsd;
+
+	switch (signal) {
+	case S_NM_IPACC_NACK:
+		ipacc_data = signal_data;
+		return ipacc_msg_nack(ipacc_data->msg_type);
+	case S_NM_IPACC_ACK:
+		ipacc_data = signal_data;
+		return ipacc_msg_ack(ipacc_data->msg_type, ipacc_data->trx);
+	case S_NM_IPACC_RESTART_ACK:
+		printf("The BTS has acked the restart. Exiting.\n");
+		exit(0);
+		break;
+	case S_NM_IPACC_RESTART_NACK:
+		printf("The BTS has nacked the restart. Exiting.\n");
+		exit(0);
+		break;
+	case S_NM_STATECHG_OPER:
+	case S_NM_STATECHG_ADM:
+		nsd = signal_data;
+		nm_state_event(signal, nsd->obj_class, nsd->obj, nsd->old_state,
+				nsd->new_state, nsd->obj_inst);
+		break;
+	default:
+		break;
+	}
+
+	return 0;
+}
+
+/* callback function passed to the ABIS OML code */
+static int percent;
+static int percent_old;
+static int swload_cbfn(unsigned int hook, unsigned int event, struct msgb *_msg,
+		       void *data, void *param)
+{
+	struct msgb *msg;
+	struct gsm_bts_trx *trx;
+
+	if (hook != GSM_HOOK_NM_SWLOAD)
+		return 0;
+
+	trx = (struct gsm_bts_trx *) data;
+
+	switch (event) {
+	case NM_MT_LOAD_INIT_ACK:
+		fprintf(stdout, "Software Load Initiate ACK\n");
+		break;
+	case NM_MT_LOAD_INIT_NACK:
+		fprintf(stderr, "ERROR: Software Load Initiate NACK\n");
+		exit(5);
+		break;
+	case NM_MT_LOAD_END_ACK:
+		fprintf(stderr, "LOAD END ACK...");
+		/* now make it the default */
+		sw_load_state = 1;
+
+		msg = msgb_alloc(1024, "sw: nvattr");
+		msg->l2h = msgb_put(msg, 3);
+		msg->l3h = &msg->l2h[3];
+
+		/* activate software */
+		if (sw_load1) {
+			msgb_v_put(msg, NM_ATT_SW_DESCR);
+			msgb_tl16v_put(msg, NM_ATT_FILE_ID, sw_load1->file_id_len, sw_load1->file_id);
+			msgb_tl16v_put(msg, NM_ATT_FILE_VERSION, sw_load1->file_version_len,
+					sw_load1->file_version);
+		}
+
+		if (sw_load2) {
+			msgb_v_put(msg, NM_ATT_SW_DESCR);
+			msgb_tl16v_put(msg, NM_ATT_FILE_ID, sw_load2->file_id_len, sw_load2->file_id);
+			msgb_tl16v_put(msg, NM_ATT_FILE_VERSION, sw_load2->file_version_len,
+					sw_load2->file_version);
+		}
+
+		/* fill in the data */
+		msg->l2h[0] = NM_ATT_IPACC_CUR_SW_CFG;
+		msg->l2h[1] = msgb_l3len(msg) >> 8;
+		msg->l2h[2] = msgb_l3len(msg) & 0xff;
+		printf("Foo l2h: %p l3h: %p... length l2: %u  l3: %u\n", msg->l2h, msg->l3h, msgb_l2len(msg), msgb_l3len(msg));
+		abis_nm_ipaccess_set_nvattr(trx, msg->l2h, msgb_l2len(msg));
+		msgb_free(msg);
+		break;
+	case NM_MT_LOAD_END_NACK:
+		fprintf(stderr, "ERROR: Software Load End NACK\n");
+		exit(3);
+		break;
+	case NM_MT_ACTIVATE_SW_NACK:
+		fprintf(stderr, "ERROR: Activate Software NACK\n");
+		exit(4);
+		break;
+	case NM_MT_ACTIVATE_SW_ACK:
+		break;
+	case NM_MT_LOAD_SEG_ACK:
+		percent = abis_nm_software_load_status(trx->bts);
+		if (percent > percent_old)
+			printf("Software Download Progress: %d%%\n", percent);
+		percent_old = percent;
+		break;
+	case NM_MT_LOAD_ABORT:
+		fprintf(stderr, "ERROR: Load aborted by the BTS.\n");
+		exit(6);
+		break;
+	}
+	return 0;
+}
+
+static void nv_put_ip_if_cfg(struct msgb *nmsg, uint32_t ip, uint32_t mask)
+{
+	msgb_put_u8(nmsg, NM_ATT_IPACC_IP_IF_CFG);
+
+	msgb_put_u32(nmsg, ip);
+	msgb_put_u32(nmsg, mask);
+}
+
+static void nv_put_gw_cfg(struct msgb *nmsg, uint32_t addr, uint32_t mask, uint32_t gw)
+{
+	msgb_put_u8(nmsg, NM_ATT_IPACC_IP_GW_CFG);
+	msgb_put_u32(nmsg, addr);
+	msgb_put_u32(nmsg, mask);
+	msgb_put_u32(nmsg, gw);
+}
+
+static void nv_put_unit_id(struct msgb *nmsg, const char *unit_id)
+{
+	msgb_tl16v_put(nmsg, NM_ATT_IPACC_UNIT_ID, strlen(unit_id)+1,
+			(const uint8_t *)unit_id);
+}
+
+static void nv_put_prim_oml(struct msgb *nmsg, uint32_t ip, uint16_t port)
+{
+	int len;
+
+	/* 0x88 + IP + port */
+	len = 1 + sizeof(ip) + sizeof(port);
+
+	msgb_put_u8(nmsg, NM_ATT_IPACC_PRIM_OML_CFG_LIST);
+	msgb_put_u16(nmsg, len);
+
+	msgb_put_u8(nmsg, 0x88);
+
+	/* IP address */
+	msgb_put_u32(nmsg, ip);
+
+	/* port number */
+	msgb_put_u16(nmsg, port);
+}
+
+static void nv_put_flags(struct msgb *nmsg, uint16_t nv_flags, uint16_t nv_mask)
+{
+	msgb_put_u8(nmsg, NM_ATT_IPACC_NV_FLAGS);
+	msgb_put_u16(nmsg, sizeof(nv_flags) + sizeof(nv_mask));
+	msgb_put_u8(nmsg, nv_flags & 0xff);
+	msgb_put_u8(nmsg, nv_mask & 0xff);
+	msgb_put_u8(nmsg, nv_flags >> 8);
+	msgb_put_u8(nmsg, nv_mask >> 8);
+}
+
+/* human-readable names for the ip.access nanoBTS NVRAM Flags */
+static const struct value_string ipa_nvflag_strs[] = {
+	{ 0x0001, "static-ip" },
+	{ 0x0002, "static-gw" },
+	{ 0x0004, "no-dhcp-vsi" },
+	{ 0x0008, "dhcp-enabled" },
+	{ 0x0040, "led-disabled" },
+	{ 0x0100, "secondary-oml-enabled" },
+	{ 0x0200, "diag-enabled" },
+	{ 0x0400, "cli-enabled" },
+	{ 0x0800, "http-enabled" },
+	{ 0x1000, "post-enabled" },
+	{ 0x2000, "snmp-enabled" },
+	{ 0, NULL }
+};
+
+/* set the flags in flags/mask according to a string-identified flag and 'enable' */
+static int ipa_nvflag_set(uint16_t *flags, uint16_t *mask, const char *name, int en)
+{
+	int rc;
+	rc = get_string_value(ipa_nvflag_strs, name);
+	if (rc < 0)
+		return rc;
+
+	*mask |= rc;
+	if (en)
+		*flags |= rc;
+	else
+		*flags &= ~rc;
+
+	return 0;
+}
+
+static void bootstrap_om(struct gsm_bts_trx *trx)
+{
+	struct msgb *nmsg = msgb_alloc(1024, "nested msgb");
+	int need_to_set_attr = 0;
+	int len;
+
+	printf("OML link established using TRX %d\n", trx->nr);
+
+	if (unit_id) {
+		len = strlen(unit_id);
+		if (len > nmsg->data_len-10)
+			goto out_err;
+		printf("setting Unit ID to '%s'\n", unit_id);
+		nv_put_unit_id(nmsg, unit_id);
+		need_to_set_attr = 1;
+	}
+	if (prim_oml_ip) {
+		struct in_addr ia;
+
+		if (!inet_aton(prim_oml_ip, &ia)) {
+			fprintf(stderr, "invalid IP address: %s\n",
+				prim_oml_ip);
+			goto out_err;
+		}
+
+		printf("setting primary OML link IP to '%s'\n", inet_ntoa(ia));
+		nv_put_prim_oml(nmsg, ntohl(ia.s_addr), 0);
+		need_to_set_attr = 1;
+	}
+	if (nv_mask) {
+		printf("setting NV Flags/Mask to 0x%04x/0x%04x\n",
+			nv_flags, nv_mask);
+		nv_put_flags(nmsg, nv_flags, nv_mask);
+		need_to_set_attr = 1;
+	}
+	if (bts_ip_addr && bts_ip_mask) {
+		struct in_addr ia_addr, ia_mask;
+
+		if (!inet_aton(bts_ip_addr, &ia_addr)) {
+			fprintf(stderr, "invalid IP address: %s\n",
+				bts_ip_addr);
+			goto out_err;
+		}
+
+		if (!inet_aton(bts_ip_mask, &ia_mask)) {
+			fprintf(stderr, "invalid IP address: %s\n",
+				bts_ip_mask);
+			goto out_err;
+		}
+
+		printf("setting static IP Address/Mask\n");
+		nv_put_ip_if_cfg(nmsg, ntohl(ia_addr.s_addr), ntohl(ia_mask.s_addr));
+		need_to_set_attr = 1;
+	}
+	if (bts_ip_gw) {
+		struct in_addr ia_gw;
+
+		if (!inet_aton(bts_ip_gw, &ia_gw)) {
+			fprintf(stderr, "invalid IP address: %s\n",
+				bts_ip_gw);
+			goto out_err;
+		}
+
+		printf("setting static IP Gateway\n");
+		/* we only set the default gateway with zero addr/mask */
+		nv_put_gw_cfg(nmsg, 0, 0, ntohl(ia_gw.s_addr));
+		need_to_set_attr = 1;
+	}
+
+	if (need_to_set_attr) {
+		abis_nm_ipaccess_set_nvattr(trx, nmsg->head, nmsg->len);
+		oml_state = 1;
+	}
+
+	if (restart && !prim_oml_ip && !software) {
+		printf("restarting BTS\n");
+		abis_nm_ipaccess_restart(trx);
+	}
+
+out_err:
+	msgb_free(nmsg);
+}
+
+static int nm_state_event(int evt, u_int8_t obj_class, void *obj,
+			  struct gsm_nm_state *old_state, struct gsm_nm_state *new_state,
+			  struct abis_om_obj_inst *obj_inst)
+{
+	if (obj_class == NM_OC_BASEB_TRANSC) {
+		if (!found_trx && obj_inst->trx_nr != 0xff) {
+			struct gsm_bts_trx *trx = container_of(obj, struct gsm_bts_trx, bb_transc);
+			bootstrap_om(trx);
+			found_trx = 1;
+		}
+	} else if (evt == S_NM_STATECHG_OPER &&
+	    obj_class == NM_OC_RADIO_CARRIER &&
+	    new_state->availability == 3) {
+		struct gsm_bts_trx *trx = obj;
+
+		if (net_listen_testnr)
+			ipac_nwl_test_start(trx, net_listen_testnr,
+					    phys_conf_min, sizeof(phys_conf_min));
+		else if (software) {
+			int rc;
+			printf("Attempting software upload with '%s'\n", software);
+			rc = abis_nm_software_load(trx->bts, trx->nr, software, 19, 0, swload_cbfn, trx);
+			if (rc < 0) {
+				fprintf(stderr, "Failed to start software load\n");
+				exit(-3);
+			}
+		}
+	}
+	return 0;
+}
+
+static struct sw_load *create_swload(struct sdp_header *header)
+{
+	struct sw_load *load;
+
+	load = talloc_zero(tall_ctx_config, struct sw_load);
+
+	strncpy((char *)load->file_id, header->firmware_info.sw_part, 20);
+	load->file_id_len = strlen(header->firmware_info.sw_part) + 1;
+
+	strncpy((char *)load->file_version, header->firmware_info.version, 20);
+	load->file_version_len = strlen(header->firmware_info.version) + 1;
+
+	return load;
+}
+
+static int find_sw_load_params(const char *filename)
+{
+	struct stat stat;
+	struct sdp_header *header;
+	struct llist_head *entry;
+	int fd;
+	void *tall_firm_ctx = 0;
+
+	entry = talloc_zero(tall_firm_ctx, struct llist_head);
+	INIT_LLIST_HEAD(entry);
+
+	fd = open(filename, O_RDONLY);
+	if (!fd) {
+		perror("nada");
+		return -1;
+	}
+
+	/* verify the file */
+	if (fstat(fd, &stat) == -1) {
+		perror("Can not stat the file");
+		return -1;
+	}
+
+	ipaccess_analyze_file(fd, stat.st_size, 0, entry);
+	if (close(fd) != 0) {
+		perror("Close failed.\n");
+		return -1;
+	}
+
+	/* try to find what we are looking for */
+	llist_for_each_entry(header, entry, entry) {
+		if (ntohs(header->firmware_info.more_more_magic) == 0x1000) {
+			sw_load1 = create_swload(header);
+		} else if (ntohs(header->firmware_info.more_more_magic) == 0x2001) {
+			sw_load2 = create_swload(header);
+		}
+	}
+
+	if (!sw_load1 || !sw_load2) {
+		fprintf(stderr, "Did not find data.\n");
+		talloc_free(tall_firm_ctx);
+		return -1;
+        }
+
+	talloc_free(tall_firm_ctx);
+	return 0;
+}
+
+static void dump_entry(struct sdp_header_item *sub_entry, int part, int fd)
+{
+	int out_fd;
+	int copied;
+	char filename[4096];
+	off_t target;
+
+	if (!dump_files)
+		return;
+
+	if (sub_entry->header_entry.something1 == 0)
+		return;
+
+	snprintf(filename, sizeof(filename), "part.%d", part++);
+	out_fd = open(filename, O_WRONLY | O_CREAT, 0660);
+	if (out_fd < 0) {
+		perror("Can not dump firmware");
+		return;
+	}
+
+	target = sub_entry->absolute_offset + ntohl(sub_entry->header_entry.start) + 4;
+	if (lseek(fd, target, SEEK_SET) != target) {
+		perror("seek failed");
+		close(out_fd);
+		return;
+	}
+
+	for (copied = 0; copied < ntohl(sub_entry->header_entry.length); ++copied) {
+		char c;
+		if (read(fd, &c, sizeof(c)) != sizeof(c)) {
+			perror("copy failed");
+			break;
+		}
+
+		if (write(out_fd, &c, sizeof(c)) != sizeof(c)) {
+			perror("write failed");
+			break;
+		}
+	}
+
+	close(out_fd);
+}
+
+static void analyze_firmware(const char *filename)
+{
+	struct stat stat;
+	struct sdp_header *header;
+	struct sdp_header_item *sub_entry;
+	struct llist_head *entry;
+	int fd;
+	void *tall_firm_ctx = 0;
+	int part = 0;
+
+	entry = talloc_zero(tall_firm_ctx, struct llist_head);
+	INIT_LLIST_HEAD(entry);
+
+	printf("Opening possible firmware '%s'\n", filename);
+	fd = open(filename, O_RDONLY);
+	if (!fd) {
+		perror("nada");
+		return;
+	}
+
+	/* verify the file */
+	if (fstat(fd, &stat) == -1) {
+		perror("Can not stat the file");
+		return;
+	}
+
+	ipaccess_analyze_file(fd, stat.st_size, 0, entry);
+
+	llist_for_each_entry(header, entry, entry) {
+		printf("Printing header information:\n");
+		printf("more_more_magic: 0x%x\n", ntohs(header->firmware_info.more_more_magic));
+		printf("header_length: %u\n", ntohl(header->firmware_info.header_length));
+		printf("file_length: %u\n", ntohl(header->firmware_info.file_length));
+		printf("sw_part: %.20s\n", header->firmware_info.sw_part);
+		printf("text1: %.64s\n", header->firmware_info.text1);
+		printf("time: %.12s\n", header->firmware_info.time);
+		printf("date: %.14s\n", header->firmware_info.date);
+		printf("text2: %.10s\n", header->firmware_info.text2);
+		printf("version: %.20s\n", header->firmware_info.version);
+		printf("subitems...\n");
+
+		llist_for_each_entry(sub_entry, &header->header_list, entry) {
+			printf("\tsomething1: %u\n", sub_entry->header_entry.something1);
+			printf("\ttext1: %.64s\n", sub_entry->header_entry.text1);
+			printf("\ttime: %.12s\n", sub_entry->header_entry.time);
+			printf("\tdate: %.14s\n", sub_entry->header_entry.date);
+			printf("\ttext2: %.10s\n", sub_entry->header_entry.text2);
+			printf("\tversion: %.20s\n", sub_entry->header_entry.version);
+			printf("\tlength: %u\n", ntohl(sub_entry->header_entry.length));
+			printf("\taddr1: 0x%x\n", ntohl(sub_entry->header_entry.addr1));
+			printf("\taddr2: 0x%x\n", ntohl(sub_entry->header_entry.addr2));
+			printf("\tstart: 0x%x\n", ntohl(sub_entry->header_entry.start));
+			printf("\tabs. offset: 0x%lx\n", sub_entry->absolute_offset);
+			printf("\n\n");
+
+			dump_entry(sub_entry, part++, fd);
+		}
+		printf("\n\n");
+	}
+
+	if (close(fd) != 0) {
+		perror("Close failed.\n");
+		return;
+	}
+
+	talloc_free(tall_firm_ctx);
+}
+
+static void print_usage(void)
+{
+	printf("Usage: ipaccess-config\n");
+}
+
+static void print_help(void)
+{
+#if 0
+	printf("Commmands for reading from the BTS:\n");
+	printf("  -D --dump\t\t\tDump the BTS configuration\n");
+	printf("\n");
+#endif
+	printf("Commmands for writing to the BTS:\n");
+	printf("  -u --unit-id UNIT_ID\t\tSet the Unit ID of the BTS\n");
+	printf("  -o --oml-ip IP\t\tSet primary OML IP (IP of your BSC)\n");
+	printf("  -i --ip-address IP/MASK\tSet static IP address + netmask of BTS\n");
+	printf("  -g --ip-gateway IP\t\tSet static IP gateway of BTS\n");
+	printf("  -r --restart\t\t\tRestart the BTS (after other operations)\n");
+	printf("  -n --nvram-flags FLAGS/MASK\tSet NVRAM attributes\n");
+	printf("  -S --nvattr-set FLAG\tSet one additional NVRAM attribute\n");
+	printf("  -U --nvattr-unset FLAG\tSet one additional NVRAM attribute\n");
+	printf("  -l --listen TESTNR\t\tPerform specified test number\n");
+	printf("  -s --stream-id ID\t\tSet the IPA Stream Identifier for OML\n");
+	printf("  -d --software FIRMWARE\tDownload firmware into BTS\n");
+	printf("\n");
+	printf("Miscellaneous commands:\n");
+	printf("  -h --help\t\t\tthis text\n");
+	printf("  -f --firmware FIRMWARE\tProvide firmware information\n");
+	printf("  -w --write-firmware\t\tThis will dump the firmware parts to the filesystem. Use with -f.\n");
+}
+
+extern void bts_model_nanobts_init();
+
+int main(int argc, char **argv)
+{
+	struct gsm_bts *bts;
+	struct sockaddr_in sin;
+	int rc, option_index = 0, stream_id = 0xff;
+	struct log_target *stderr_target;
+
+	log_init(&log_info);
+	stderr_target = log_target_create_stderr();
+	log_add_target(stderr_target);
+	log_set_all_filter(stderr_target, 1);
+	log_set_log_level(stderr_target, 0);
+	log_parse_category_mask(stderr_target, "DNM,0");
+	bts_model_nanobts_init();
+
+	printf("ipaccess-config (C) 2009-2010 by Harald Welte and others\n");
+	printf("This is FREE SOFTWARE with ABSOLUTELY NO WARRANTY\n\n");
+
+	while (1) {
+		int c;
+		unsigned long ul;
+		char *slash;
+		static struct option long_options[] = {
+			{ "unit-id", 1, 0, 'u' },
+			{ "oml-ip", 1, 0, 'o' },
+			{ "ip-address", 1, 0, 'i' },
+			{ "ip-gateway", 1, 0, 'g' },
+			{ "restart", 0, 0, 'r' },
+			{ "nvram-flags", 1, 0, 'n' },
+			{ "nvattr-set", 1, 0, 'S' },
+			{ "nvattr-unset", 1, 0, 'U' },
+			{ "help", 0, 0, 'h' },
+			{ "listen", 1, 0, 'l' },
+			{ "stream-id", 1, 0, 's' },
+			{ "software", 1, 0, 'd' },
+			{ "firmware", 1, 0, 'f' },
+			{ "write-firmware", 0, 0, 'w' },
+			{ "disable-color", 0, 0, 'c'},
+			{ 0, 0, 0, 0 },
+		};
+
+		c = getopt_long(argc, argv, "u:o:i:g:rn:S:U:l:hs:d:f:wc", long_options,
+				&option_index);
+
+		if (c == -1)
+			break;
+
+		switch (c) {
+		case 'u':
+			unit_id = optarg;
+			break;
+		case 'o':
+			prim_oml_ip = optarg;
+			break;
+		case 'i':
+			slash = strchr(optarg, '/');
+			if (!slash)
+				exit(2);
+			bts_ip_addr = optarg;
+			*slash = 0;
+			bts_ip_mask = slash+1;
+			break;
+		case 'g':
+			bts_ip_gw = optarg;
+			break;
+		case 'r':
+			restart = 1;
+			break;
+		case 'n':
+			slash = strchr(optarg, '/');
+			if (!slash)
+				exit(2);
+			ul = strtoul(optarg, NULL, 16);
+			nv_flags = ul & 0xffff;
+			ul = strtoul(slash+1, NULL, 16);
+			nv_mask = ul & 0xffff;
+			break;
+		case 'S':
+			if (ipa_nvflag_set(&nv_flags, &nv_mask, optarg, 1) < 0)
+				exit(2);
+			break;
+		case 'U':
+			if (ipa_nvflag_set(&nv_flags, &nv_mask, optarg, 0) < 0)
+				exit(2);
+			break;
+		case 'l':
+			net_listen_testnr = atoi(optarg);
+			break;
+		case 's':
+			stream_id = atoi(optarg);
+			break;
+		case 'd':
+			software = strdup(optarg);
+			if (find_sw_load_params(optarg) != 0)
+				exit(0);
+			break;
+		case 'f':
+			firmware_analysis = optarg;
+			break;
+		case 'w':
+			dump_files = 1;
+			break;
+		case 'c':
+			log_set_use_color(stderr_target, 0);
+			break;
+		case 'h':
+			print_usage();
+			print_help();
+			exit(0);
+		}
+	};
+
+	if (firmware_analysis)
+		analyze_firmware(firmware_analysis);
+
+	if (optind >= argc) {
+		/* only warn if we have not done anything else */
+		if (!firmware_analysis)
+			fprintf(stderr, "you have to specify the IP address of the BTS. Use --help for more information\n");
+		exit(2);
+	}
+
+	gsmnet = gsm_network_init(1, 1, NULL);
+	if (!gsmnet)
+		exit(1);
+
+	bts = gsm_bts_alloc(gsmnet, GSM_BTS_TYPE_NANOBTS, HARDCODED_TSC,
+				HARDCODED_BSIC);
+	/* ip.access supports up to 4 chained TRX */
+	gsm_bts_trx_alloc(bts);
+	gsm_bts_trx_alloc(bts);
+	gsm_bts_trx_alloc(bts);
+	bts->oml_tei = stream_id;
+	
+	register_signal_handler(SS_NM, nm_sig_cb, NULL);
+	register_signal_handler(SS_IPAC_NWL, nwl_sig_cb, NULL);
+
+	ipac_nwl_init();
+
+	printf("Trying to connect to ip.access BTS ...\n");
+
+	memset(&sin, 0, sizeof(sin));
+	sin.sin_family = AF_INET;
+	inet_aton(argv[optind], &sin.sin_addr);
+	rc = ia_config_connect(bts, &sin);
+	if (rc < 0) {
+		perror("Error connecting to the BTS");
+		exit(1);
+	}
+	
+	bts->oml_link->ts->sign.delay = 10;
+	bts->c0->rsl_link->ts->sign.delay = 10;
+	while (1) {
+		rc = bsc_select_main(0);
+		if (rc < 0)
+			exit(3);
+	}
+
+	exit(0);
+}
+
diff --git a/src/ipaccess/ipaccess-find.c b/src/ipaccess/ipaccess-find.c
new file mode 100644
index 000000000..bea4b77ad
--- /dev/null
+++ b/src/ipaccess/ipaccess-find.c
@@ -0,0 +1,227 @@
+/* ip.access nanoBTS configuration tool */
+
+/* (C) 2009-2010 by Harald Welte <laforge@gnumonks.org>
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+
+#include <osmocore/select.h>
+#include <osmocore/timer.h>
+#include <openbsc/ipaccess.h>
+#include <openbsc/gsm_data.h>
+
+static const char *idtag_names[] = {
+	[IPAC_IDTAG_SERNR]	= "Serial Number",
+	[IPAC_IDTAG_UNITNAME]	= "Unit Name",
+	[IPAC_IDTAG_LOCATION1]	= "Location 1",
+	[IPAC_IDTAG_LOCATION2]	= "Location 2",
+	[IPAC_IDTAG_EQUIPVERS]	= "Equipment Version",
+	[IPAC_IDTAG_SWVERSION]	= "Software Version",
+	[IPAC_IDTAG_IPADDR]	= "IP Address",
+	[IPAC_IDTAG_MACADDR]	= "MAC Address",
+	[IPAC_IDTAG_UNIT]	= "Unit ID",
+};
+
+static const char *ipac_idtag_name(int tag)
+{
+	if (tag >= ARRAY_SIZE(idtag_names))
+		return "unknown";
+
+	return idtag_names[tag];
+}
+
+static int udp_sock(const char *ifname)
+{
+	int fd, rc, bc = 1;
+	struct sockaddr_in sa;
+
+	fd = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP);
+	if (fd < 0)
+		return fd;
+
+	if (ifname) {
+		rc = setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE, ifname,
+				strlen(ifname));
+		if (rc < 0)
+			goto err;
+	}
+
+	sa.sin_family = AF_INET;
+	sa.sin_port = htons(3006);
+	sa.sin_addr.s_addr = INADDR_ANY;
+
+	rc = bind(fd, (struct sockaddr *)&sa, sizeof(sa));
+	if (rc < 0)
+		goto err;
+
+	rc = setsockopt(fd, SOL_SOCKET, SO_BROADCAST, &bc, sizeof(bc));
+	if (rc < 0)
+		goto err;
+
+#if 0
+	/* we cannot bind, since the response packets don't come from
+	 * the broadcast address */
+	sa.sin_family = AF_INET;
+	sa.sin_port = htons(3006);
+	inet_aton("255.255.255.255", &sa.sin_addr);
+
+	rc = connect(fd, (struct sockaddr *)&sa, sizeof(sa));
+	if (rc < 0)
+		goto err;
+#endif
+	return fd;
+
+err:
+	close(fd);
+	return rc;
+}
+
+const unsigned char find_pkt[] = { 0x00, 0x0b+8, IPAC_PROTO_IPACCESS, 0x00,
+				IPAC_MSGT_ID_GET,
+					0x01, IPAC_IDTAG_MACADDR,
+					0x01, IPAC_IDTAG_IPADDR,
+					0x01, IPAC_IDTAG_UNIT,
+					0x01, IPAC_IDTAG_LOCATION1,
+					0x01, IPAC_IDTAG_LOCATION2,
+					0x01, IPAC_IDTAG_EQUIPVERS,
+					0x01, IPAC_IDTAG_SWVERSION,
+					0x01, IPAC_IDTAG_UNITNAME,
+					0x01, IPAC_IDTAG_SERNR,
+				};
+
+
+static int bcast_find(int fd)
+{
+	struct sockaddr_in sa;
+
+	sa.sin_family = AF_INET;
+	sa.sin_port = htons(3006);
+	inet_aton("255.255.255.255", &sa.sin_addr);
+
+	return sendto(fd, find_pkt, sizeof(find_pkt), 0, (struct sockaddr *) &sa, sizeof(sa));
+}
+
+static int parse_response(unsigned char *buf, int len)
+{
+	u_int8_t t_len;
+	u_int8_t t_tag;
+	u_int8_t *cur = buf;
+
+	while (cur < buf + len) {
+		t_len = *cur++;
+		t_tag = *cur++;
+		
+		printf("%s='%s'  ", ipac_idtag_name(t_tag), cur);
+
+		cur += t_len;
+	}
+	printf("\n");
+	return 0;
+}
+
+static int read_response(int fd)
+{
+	unsigned char buf[255];
+	struct sockaddr_in sa;
+	int len;
+	socklen_t sa_len = sizeof(sa);
+
+	len = recvfrom(fd, buf, sizeof(buf), 0, (struct sockaddr *)&sa, &sa_len);
+	if (len < 0)
+		return len;
+
+	/* 2 bytes length, 1 byte protocol (0xfe) */
+	if (buf[2] != 0xfe)
+		return 0;
+
+	if (buf[4] != IPAC_MSGT_ID_RESP)
+		return 0;
+
+	return parse_response(buf+6, len-6);
+}
+
+static int bfd_cb(struct bsc_fd *bfd, unsigned int flags)
+{
+	if (flags & BSC_FD_READ)
+		return read_response(bfd->fd);
+	if (flags & BSC_FD_WRITE) {
+		bfd->when &= ~BSC_FD_WRITE;
+		return bcast_find(bfd->fd);
+	}
+	return 0;
+}
+
+static struct timer_list timer;
+
+static void timer_cb(void *_data)
+{
+	struct bsc_fd *bfd = _data;
+
+	bfd->when |= BSC_FD_WRITE;
+
+	bsc_schedule_timer(&timer, 5, 0);
+}
+
+int main(int argc, char **argv)
+{
+	struct bsc_fd bfd;
+	char *ifname;
+	int rc;
+
+	printf("ipaccess-find (C) 2009 by Harald Welte\n");
+	printf("This is FREE SOFTWARE with ABSOLUTELY NO WARRANTY\n\n");
+
+	if (argc < 2) {
+		fprintf(stdout, "you might need to specify the outgoing\n"
+			" network interface, e.g. ``%s eth0''\n", argv[0]);
+	}
+
+	ifname = argv[1];
+	bfd.cb = bfd_cb;
+	bfd.when = BSC_FD_READ | BSC_FD_WRITE;
+	bfd.fd = udp_sock(ifname);
+	if (bfd.fd < 0) {
+		perror("Cannot create local socket for broadcast udp");
+		exit(1);
+	}
+
+	bsc_register_fd(&bfd);
+
+	timer.cb = timer_cb;
+	timer.data = &bfd;
+
+	bsc_schedule_timer(&timer, 5, 0);
+
+	printf("Trying to find ip.access BTS by broadcast UDP...\n");
+
+	while (1) {
+		rc = bsc_select_main(0);
+		if (rc < 0)
+			exit(3);
+	}
+
+	exit(0);
+}
+
diff --git a/src/ipaccess/ipaccess-firmware.c b/src/ipaccess/ipaccess-firmware.c
new file mode 100644
index 000000000..7fdd0f825
--- /dev/null
+++ b/src/ipaccess/ipaccess-firmware.c
@@ -0,0 +1,135 @@
+/* Routines for parsing an ipacces SDP firmware file */
+
+/* (C) 2009 by Holger Hans Peter Freyther <zecke@selfish.org>
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <openbsc/debug.h>
+#include <openbsc/ipaccess.h>
+#include <osmocore/talloc.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#define PART_LENGTH 138
+
+static_assert(sizeof(struct sdp_header_entry) == 138, right_entry);
+static_assert(sizeof(struct sdp_firmware) == 158, _right_header_length);
+
+/* more magic, the second "int" in the header */
+static char more_magic[] = { 0x10, 0x02 };
+
+int ipaccess_analyze_file(int fd, const unsigned int st_size, const unsigned int base_offset, struct llist_head *list)
+{
+	struct sdp_firmware *firmware_header = 0;
+	struct sdp_header *header;
+	char buf[4096];
+	int rc, i;
+	u_int16_t table_size;
+	u_int16_t table_offset;
+	off_t table_start;
+
+
+	rc = read(fd, buf, sizeof(*firmware_header));
+	if (rc < 0) {
+		perror("Can not read header start.");
+		return -1;
+	}
+
+	firmware_header = (struct sdp_firmware *) &buf[0];
+	if (strncmp(firmware_header->magic, " SDP", 4) != 0) {
+		fprintf(stderr, "Wrong magic.\n");
+		return -1;
+	}
+
+	if (memcmp(firmware_header->more_magic, more_magic, 2) != 0) {
+		fprintf(stderr, "Wrong more magic. Got: 0x%x %x %x %x\n",
+			firmware_header->more_magic[0] & 0xff, firmware_header->more_magic[1] & 0xff,
+			firmware_header->more_magic[2] & 0xff, firmware_header->more_magic[3] & 0xff);
+		return -1;
+	}
+
+
+	if (ntohl(firmware_header->file_length) != st_size) {
+		fprintf(stderr, "The filesize and the header do not match.\n");
+		return -1;
+	}
+
+	/* add the firmware */
+	header = talloc_zero(list, struct sdp_header);
+	header->firmware_info = *firmware_header;
+	INIT_LLIST_HEAD(&header->header_list);
+	llist_add(&header->entry, list);
+
+	table_offset = ntohs(firmware_header->table_offset);
+	table_start = lseek(fd, table_offset, SEEK_CUR);
+	if (table_start == -1) {
+		fprintf(stderr, "Failed to seek to the rel position: 0x%x\n", table_offset);
+		return -1;
+	}
+
+	if (read(fd, &table_size, sizeof(table_size)) != sizeof(table_size)) {
+		fprintf(stderr, "The table size could not be read.\n");
+		return -1;
+	}
+
+	table_size = ntohs(table_size);
+
+	if (table_size % PART_LENGTH != 0) {
+		fprintf(stderr, "The part length seems to be wrong: 0x%x\n", table_size);
+		return -1;
+	}
+
+	/* look into each firmware now */
+	for (i = 0; i < table_size / PART_LENGTH; ++i) {
+		struct sdp_header_entry entry;
+		struct sdp_header_item *header_entry;
+		unsigned int offset = table_start + 2;
+		offset += i * 138;
+
+		if (lseek(fd, offset, SEEK_SET) != offset) {
+			fprintf(stderr, "Can not seek to the offset: %u.\n", offset);
+			return -1;
+		}
+
+		rc = read(fd, &entry, sizeof(entry));
+		if (rc != sizeof(entry)) {
+			fprintf(stderr, "Can not read the header entry.\n");
+			return -1;
+		}
+
+		header_entry = talloc_zero(header,  struct sdp_header_item);
+		header_entry->header_entry = entry;
+		header_entry->absolute_offset = base_offset;
+		llist_add(&header_entry->entry, &header->header_list);
+
+		/* now we need to find the SDP file... */
+		offset = ntohl(entry.start) + 4 + base_offset;
+		if (lseek(fd, offset, SEEK_SET) != offset) {
+			perror("can't seek to sdp");
+			return -1;
+		}
+
+
+		ipaccess_analyze_file(fd, ntohl(entry.length), offset, list);
+	}
+
+	return 0;
+}
+
diff --git a/src/ipaccess/ipaccess-proxy.c b/src/ipaccess/ipaccess-proxy.c
new file mode 100644
index 000000000..2dc1b2f62
--- /dev/null
+++ b/src/ipaccess/ipaccess-proxy.c
@@ -0,0 +1,1373 @@
+/* OpenBSC Abis/IP proxy ip.access nanoBTS */
+
+/* (C) 2009 by Harald Welte <laforge@gnumonks.org>
+ * (C) 2010 by On-Waves
+ * (C) 2010 by Holger Hans Peter Freyther <zecke@selfish.org>
+ *
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <string.h>
+#include <signal.h>
+#include <time.h>
+#include <sys/fcntl.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+#include <arpa/inet.h>
+#include <netinet/in.h>
+
+#define _GNU_SOURCE
+#include <getopt.h>
+
+#include <openbsc/gsm_data.h>
+#include <osmocore/select.h>
+#include <osmocore/tlv.h>
+#include <osmocore/msgb.h>
+#include <openbsc/debug.h>
+#include <openbsc/ipaccess.h>
+#include <osmocore/talloc.h>
+
+static struct log_target *stderr_target;
+
+/* one instance of an ip.access protocol proxy */
+struct ipa_proxy {
+	/* socket where we listen for incoming OML from BTS */
+	struct bsc_fd oml_listen_fd;
+	/* socket where we listen for incoming RSL from BTS */
+	struct bsc_fd rsl_listen_fd;
+	/* list of BTS's (struct ipa_bts_conn */
+	struct llist_head bts_list;
+	/* the BSC reconnect timer */
+	struct timer_list reconn_timer;
+	/* global GPRS NS data */
+	struct in_addr gprs_addr;
+	struct in_addr listen_addr;
+};
+
+/* global pointer to the proxy structure */
+static struct ipa_proxy *ipp;
+
+struct ipa_proxy_conn {
+	struct bsc_fd fd;
+	struct llist_head tx_queue;
+	struct ipa_bts_conn *bts_conn;
+};
+#define MAX_TRX 4
+
+/* represents a particular BTS in our proxy */
+struct ipa_bts_conn {
+	/* list of BTS's (ipa_proxy->bts_list) */
+	struct llist_head list;
+	/* back pointer to the proxy which we belong to */
+	struct ipa_proxy *ipp;
+	/* the unit ID as determined by CCM */
+	struct {
+		u_int16_t site_id;
+		u_int16_t bts_id;
+	} unit_id;
+
+	/* incoming connections from BTS */
+	struct ipa_proxy_conn *oml_conn;
+	struct ipa_proxy_conn *rsl_conn[MAX_TRX];
+
+	/* outgoing connections to BSC */
+	struct ipa_proxy_conn *bsc_oml_conn;
+	struct ipa_proxy_conn *bsc_rsl_conn[MAX_TRX];
+
+	/* UDP sockets for BTS and BSC injection */
+	struct bsc_fd udp_bts_fd;
+	struct bsc_fd udp_bsc_fd;
+
+	/* NS data */
+	struct in_addr bts_addr;
+	struct bsc_fd gprs_ns_fd;
+	int gprs_local_port;
+	uint16_t gprs_orig_port;
+	uint32_t gprs_orig_ip;
+
+	char *id_tags[0xff];
+	u_int8_t *id_resp;
+	unsigned int id_resp_len;
+};
+
+enum ipp_fd_type {
+	OML_FROM_BTS = 1,
+	RSL_FROM_BTS = 2,
+	OML_TO_BSC = 3,
+	RSL_TO_BSC = 4,
+	UDP_TO_BTS = 5,
+	UDP_TO_BSC = 6,
+};
+
+/* some of the code against we link from OpenBSC needs this */
+void *tall_bsc_ctx;
+
+static char *listen_ipaddr;
+static char *bsc_ipaddr;
+static char *gprs_ns_ipaddr;
+
+static int make_gprs_sock(struct bsc_fd *bfd, int (*cb)(struct bsc_fd*,unsigned int), void *);
+static int gprs_ns_cb(struct bsc_fd *bfd, unsigned int what);
+
+#define PROXY_ALLOC_SIZE	1200
+
+static const u_int8_t pong[] = { 0, 1, IPAC_PROTO_IPACCESS, IPAC_MSGT_PONG };
+static const u_int8_t id_ack[] = { 0, 1, IPAC_PROTO_IPACCESS, IPAC_MSGT_ID_ACK };
+static const u_int8_t id_req[] = { 0, 17, IPAC_PROTO_IPACCESS, IPAC_MSGT_ID_GET,
+					0x01, IPAC_IDTAG_UNIT,
+					0x01, IPAC_IDTAG_MACADDR,
+					0x01, IPAC_IDTAG_LOCATION1,
+					0x01, IPAC_IDTAG_LOCATION2,
+					0x01, IPAC_IDTAG_EQUIPVERS,
+					0x01, IPAC_IDTAG_SWVERSION,
+					0x01, IPAC_IDTAG_UNITNAME,
+					0x01, IPAC_IDTAG_SERNR,
+				};
+
+static const char *idtag_names[] = {
+	[IPAC_IDTAG_SERNR]	= "Serial_Number",
+	[IPAC_IDTAG_UNITNAME]	= "Unit_Name",
+	[IPAC_IDTAG_LOCATION1]	= "Location_1",
+	[IPAC_IDTAG_LOCATION2]	= "Location_2",
+	[IPAC_IDTAG_EQUIPVERS]	= "Equipment_Version",
+	[IPAC_IDTAG_SWVERSION]	= "Software_Version",
+	[IPAC_IDTAG_IPADDR]	= "IP_Address",
+	[IPAC_IDTAG_MACADDR]	= "MAC_Address",
+	[IPAC_IDTAG_UNIT]	= "Unit_ID",
+};
+
+static const char *ipac_idtag_name(int tag)
+{
+	if (tag >= ARRAY_SIZE(idtag_names))
+		return "unknown";
+
+	return idtag_names[tag];
+}
+
+static int ipac_idtag_parse(struct tlv_parsed *dec, unsigned char *buf, int len)
+{
+	u_int8_t t_len;
+	u_int8_t t_tag;
+	u_int8_t *cur = buf;
+
+	while (cur < buf + len) {
+		t_len = *cur++;
+		t_tag = *cur++;
+
+		DEBUGPC(DMI, "%s='%s' ", ipac_idtag_name(t_tag), cur);
+
+		dec->lv[t_tag].len = t_len;
+		dec->lv[t_tag].val = cur;
+
+		cur += t_len;
+	}
+	return 0;
+}
+
+static int parse_unitid(const char *str, u_int16_t *site_id, u_int16_t *bts_id,
+			u_int16_t *trx_id)
+{
+	unsigned long ul;
+	char *endptr;
+	const char *nptr;
+
+	nptr = str;
+	ul = strtoul(nptr, &endptr, 10);
+	if (endptr <= nptr)
+		return -EINVAL;
+	if (site_id)
+		*site_id = ul & 0xffff;
+
+	if (*endptr++ != '/')
+		return -EINVAL;
+
+	nptr = endptr;
+	ul = strtoul(nptr, &endptr, 10);
+	if (endptr <= nptr)
+		return -EINVAL;
+	if (bts_id)
+		*bts_id = ul & 0xffff;
+
+	if (*endptr++ != '/')
+		return -EINVAL;
+
+	nptr = endptr;
+	ul = strtoul(nptr, &endptr, 10);
+	if (endptr <= nptr)
+		return -EINVAL;
+	if (trx_id)
+		*trx_id = ul & 0xffff;
+
+	return 0;
+}
+
+static struct ipa_bts_conn *find_bts_by_unitid(struct ipa_proxy *ipp,
+						u_int16_t site_id,
+						u_int16_t bts_id)
+{
+	struct ipa_bts_conn *ipbc;
+
+	llist_for_each_entry(ipbc, &ipp->bts_list, list) {
+		if (ipbc->unit_id.site_id == site_id &&
+		    ipbc->unit_id.bts_id == bts_id)
+			return ipbc;
+	}
+
+	return NULL;
+}
+
+struct ipa_proxy_conn *alloc_conn(void)
+{
+	struct ipa_proxy_conn *ipc;
+
+	ipc = talloc_zero(tall_bsc_ctx, struct ipa_proxy_conn);
+	if (!ipc)
+		return NULL;
+
+	INIT_LLIST_HEAD(&ipc->tx_queue);
+
+	return ipc;
+}
+
+static int store_idtags(struct ipa_bts_conn *ipbc, struct tlv_parsed *tlvp)
+{
+	unsigned int i, len;
+
+	for (i = 0; i <= 0xff; i++) {
+		if (!TLVP_PRESENT(tlvp, i))
+			continue;
+
+		len = TLVP_LEN(tlvp, i);
+#if 0
+		if (!ipbc->id_tags[i])
+			ipbc->id_tags[i] = talloc_size(tall_bsc_ctx, len);
+		else
+#endif
+			ipbc->id_tags[i] = talloc_realloc_size(ipbc,
+							  ipbc->id_tags[i], len);
+		if (!ipbc->id_tags[i])
+			return -ENOMEM;
+
+		memset(ipbc->id_tags[i], 0, len);
+		//memcpy(ipbc->id_tags[i], TLVP_VAL(tlvp, i), len);
+	}
+	return 0;
+}
+
+
+static struct ipa_proxy_conn *connect_bsc(struct sockaddr_in *sa, int priv_nr, void *data);
+
+#define logp_ipbc_uid(ss, lvl, ipbc, trx_id) _logp_ipbc_uid(ss, lvl, __FILE__, __LINE__, ipbc, trx_id)
+
+static void _logp_ipbc_uid(unsigned int ss, unsigned int lvl, char *file, int line,
+			   struct ipa_bts_conn *ipbc, u_int8_t trx_id)
+{
+	if (ipbc)
+		logp2(ss, lvl, file, line, 0, "(%u/%u/%u) ", ipbc->unit_id.site_id,
+		     ipbc->unit_id.bts_id, trx_id);
+	else
+		logp2(ss, lvl, file, line, 0, "unknown ");
+}
+
+/* UDP socket handling */
+
+static int make_sock(struct bsc_fd *bfd, u_int16_t port, int proto, int priv_nr,
+		     int (*cb)(struct bsc_fd *fd, unsigned int what),
+		     void *data)
+{
+	struct sockaddr_in addr;
+	int ret, on = 1;
+
+	bfd->fd = socket(AF_INET, SOCK_DGRAM, proto);
+	bfd->cb = cb;
+	bfd->when = BSC_FD_READ;
+	bfd->data = data;
+	bfd->priv_nr = priv_nr;
+
+	memset(&addr, 0, sizeof(addr));
+	addr.sin_family = AF_INET;
+	addr.sin_port = htons(port);
+	addr.sin_addr.s_addr = INADDR_ANY;
+
+	setsockopt(bfd->fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
+
+	ret = bind(bfd->fd, (struct sockaddr *) &addr, sizeof(addr));
+	if (ret < 0) {
+		LOGP(DINP, LOGL_ERROR, "could not bind socket: %s\n",
+			strerror(errno));
+		return -EIO;
+	}
+
+	ret = bsc_register_fd(bfd);
+	if (ret < 0) {
+		perror("register UDP fd");
+		return ret;
+	}
+	return 0;
+}
+
+static int handle_udp_read(struct bsc_fd *bfd)
+{
+	struct ipa_bts_conn *ipbc = bfd->data;
+	struct ipa_proxy_conn *other_conn = NULL;
+	struct msgb *msg = msgb_alloc(PROXY_ALLOC_SIZE, "Abis/IP UDP");
+	struct ipaccess_head *hh;
+	int ret;
+
+	/* with UDP sockets, we cannot read partial packets but have to read
+	 * all of it in one go */
+	hh = (struct ipaccess_head *) msg->data;
+	ret = recv(bfd->fd, msg->data, msg->data_len, 0);
+	if (ret < 0) {
+		if (errno != EAGAIN)
+			LOGP(DINP, LOGL_ERROR, "recv error  %s\n", strerror(errno));
+		msgb_free(msg);
+		return ret;
+	}
+	if (ret == 0) {
+		DEBUGP(DINP, "UDP peer disappeared, dead socket\n");
+		bsc_unregister_fd(bfd);
+		close(bfd->fd);
+		bfd->fd = -1;
+		msgb_free(msg);
+		return -EIO;
+	}
+	if (ret < sizeof(*hh)) {
+		DEBUGP(DINP, "could not even read header!?!\n");
+		msgb_free(msg);
+		return -EIO;
+	}
+	msgb_put(msg, ret);
+	msg->l2h = msg->data + sizeof(*hh);
+	DEBUGP(DMI, "UDP RX: %s\n", hexdump(msg->data, msg->len));
+
+	if (hh->len != msg->len - sizeof(*hh)) {
+		DEBUGP(DINP, "length (%u/%u) disagrees with header(%u)\n",
+			msg->len, msg->len - 3, hh->len);
+		msgb_free(msg);
+		return -EIO;
+	}
+
+	switch (bfd->priv_nr & 0xff) {
+	case UDP_TO_BTS:
+		/* injection towards BTS */
+		switch (hh->proto) {
+		case IPAC_PROTO_RSL:
+			/* FIXME: what to do about TRX > 0 */
+			other_conn = ipbc->rsl_conn[0];
+			break;
+		default:
+			DEBUGP(DINP, "Unknown protocol 0x%02x, sending to "
+				"OML FD\n", hh->proto);
+			/* fall through */
+		case IPAC_PROTO_IPACCESS:
+		case IPAC_PROTO_OML:
+			other_conn = ipbc->oml_conn;
+			break;
+		}
+		break;
+	case UDP_TO_BSC:
+		/* injection towards BSC */
+		switch (hh->proto) {
+		case IPAC_PROTO_RSL:
+			/* FIXME: what to do about TRX > 0 */
+			other_conn = ipbc->bsc_rsl_conn[0];
+			break;
+		default:
+			DEBUGP(DINP, "Unknown protocol 0x%02x, sending to "
+				"OML FD\n", hh->proto);
+		case IPAC_PROTO_IPACCESS:
+		case IPAC_PROTO_OML:
+			other_conn = ipbc->bsc_oml_conn;
+			break;
+		}
+		break;
+	default:
+		DEBUGP(DINP, "Unknown filedescriptor priv_nr=%04x\n", bfd->priv_nr);
+		break;
+	}
+
+	if (other_conn) {
+		/* enqueue the message for TX on the respective FD */
+		msgb_enqueue(&other_conn->tx_queue, msg);
+		other_conn->fd.when |= BSC_FD_WRITE;
+	} else
+		msgb_free(msg);
+
+	return 0;
+}
+
+static int handle_udp_write(struct bsc_fd *bfd)
+{
+	/* not implemented yet */
+	bfd->when &= ~BSC_FD_WRITE;
+
+	return -EIO;
+}
+
+/* callback from select.c in case one of the fd's can be read/written */
+static int udp_fd_cb(struct bsc_fd *bfd, unsigned int what)
+{
+	int rc = 0;
+
+	if (what & BSC_FD_READ)
+		rc = handle_udp_read(bfd);
+	if (what & BSC_FD_WRITE)
+		rc = handle_udp_write(bfd);
+
+	return rc;
+}
+
+
+static int ipbc_alloc_connect(struct ipa_proxy_conn *ipc, struct bsc_fd *bfd,
+			      u_int16_t site_id, u_int16_t bts_id,
+			      u_int16_t trx_id, struct tlv_parsed *tlvp,
+			      struct msgb *msg)
+{
+	struct ipa_bts_conn *ipbc;
+	u_int16_t udp_port;
+	int ret = 0;
+	struct sockaddr_in sin;
+
+	memset(&sin, 0, sizeof(sin));
+	sin.sin_family = AF_INET;
+	inet_aton(bsc_ipaddr, &sin.sin_addr);
+
+	DEBUGP(DINP, "(%u/%u/%u) New BTS connection: ",
+		site_id, bts_id, trx_id);
+
+	/* OML needs to be established before RSL */
+	if ((bfd->priv_nr & 0xff) != OML_FROM_BTS) {
+		DEBUGPC(DINP, "Not a OML connection ?!?\n");
+		return -EIO;
+	}
+
+	/* allocate new BTS connection data structure */
+	ipbc = talloc_zero(tall_bsc_ctx, struct ipa_bts_conn);
+	if (!ipbc) {
+		ret = -ENOMEM;
+		goto err_out;
+	}
+
+	DEBUGPC(DINP, "Created BTS Conn data structure\n");
+	ipbc->ipp = ipp;
+	ipbc->unit_id.site_id = site_id;
+	ipbc->unit_id.bts_id = bts_id;
+	ipbc->oml_conn = ipc;
+	ipc->bts_conn = ipbc;
+
+	/* store the content of the ID TAGS for later reference */
+	store_idtags(ipbc, tlvp);
+	ipbc->id_resp_len = msg->len;
+	ipbc->id_resp = talloc_size(tall_bsc_ctx, ipbc->id_resp_len);
+	memcpy(ipbc->id_resp, msg->data, ipbc->id_resp_len);
+
+	/* Create OML TCP connection towards BSC */
+	sin.sin_port = htons(IPA_TCP_PORT_OML);
+	ipbc->bsc_oml_conn = connect_bsc(&sin, OML_TO_BSC, ipbc);
+	if (!ipbc->bsc_oml_conn) {
+		ret = -EIO;
+		goto err_bsc_conn;
+	}
+
+	DEBUGP(DINP, "(%u/%u/%u) OML Connected to BSC\n",
+		site_id, bts_id, trx_id);
+
+	/* Create UDP socket for BTS packet injection */
+	udp_port = 10000 + (site_id % 1000)*100 + (bts_id % 100);
+	ret = make_sock(&ipbc->udp_bts_fd, udp_port, IPPROTO_UDP,
+			UDP_TO_BTS, udp_fd_cb, ipbc);
+	if (ret < 0)
+		goto err_udp_bts;
+	DEBUGP(DINP, "(%u/%u/%u) Created UDP socket for injection "
+		"towards BTS at port %u\n", site_id, bts_id, trx_id, udp_port);
+
+	/* Create UDP socket for BSC packet injection */
+	udp_port = 20000 + (site_id % 1000)*100 + (bts_id % 100);
+	ret = make_sock(&ipbc->udp_bsc_fd, udp_port, IPPROTO_UDP,
+			UDP_TO_BSC, udp_fd_cb, ipbc);
+	if (ret < 0)
+		goto err_udp_bsc;
+	DEBUGP(DINP, "(%u/%u/%u) Created UDP socket for injection "
+		"towards BSC at port %u\n", site_id, bts_id, trx_id, udp_port);
+
+
+	/* GPRS NS related code */
+	if (gprs_ns_ipaddr) {
+		struct sockaddr_in sock;
+		socklen_t len = sizeof(sock);
+		ret = make_gprs_sock(&ipbc->gprs_ns_fd, gprs_ns_cb, ipbc);
+		if (ret < 0) {
+			LOGP(DINP, LOGL_ERROR, "Creating the GPRS socket failed.\n");
+			goto err_udp_bsc;
+		}
+
+		ret = getsockname(ipbc->gprs_ns_fd.fd, (struct sockaddr* ) &sock, &len);
+		ipbc->gprs_local_port = ntohs(sock.sin_port);
+		LOGP(DINP, LOGL_NOTICE,
+			"Created GPRS NS Socket. Listening on: %s:%d\n",
+			inet_ntoa(sock.sin_addr), ipbc->gprs_local_port);
+
+		ret = getpeername(bfd->fd, (struct sockaddr* ) &sock, &len);
+		ipbc->bts_addr = sock.sin_addr;
+	}
+
+	llist_add(&ipbc->list, &ipp->bts_list);
+
+	return 0;
+
+err_udp_bsc:
+	bsc_unregister_fd(&ipbc->udp_bts_fd);
+err_udp_bts:
+	bsc_unregister_fd(&ipbc->bsc_oml_conn->fd);
+	close(ipbc->bsc_oml_conn->fd.fd);
+	talloc_free(ipbc->bsc_oml_conn);
+	ipbc->bsc_oml_conn = NULL;
+err_bsc_conn:
+	talloc_free(ipbc->id_resp);
+	talloc_free(ipbc);
+#if 0
+	bsc_unregister_fd(bfd);
+	close(bfd->fd);
+	talloc_free(bfd);
+#endif
+err_out:
+	return ret;
+}
+
+static int ipaccess_rcvmsg(struct ipa_proxy_conn *ipc, struct msgb *msg,
+			   struct bsc_fd *bfd)
+{
+	struct tlv_parsed tlvp;
+	u_int8_t msg_type = *(msg->l2h);
+	u_int16_t site_id, bts_id, trx_id;
+	struct ipa_bts_conn *ipbc;
+	int ret = 0;
+
+	switch (msg_type) {
+	case IPAC_MSGT_PING:
+		ret = write(bfd->fd, pong, sizeof(pong));
+		if (ret < 0)
+			return ret;
+		if (ret < sizeof(pong)) {
+			DEBUGP(DINP, "short write\n");
+			return -EIO;
+		}
+		break;
+	case IPAC_MSGT_PONG:
+		DEBUGP(DMI, "PONG!\n");
+		break;
+	case IPAC_MSGT_ID_RESP:
+		DEBUGP(DMI, "ID_RESP ");
+		/* parse tags, search for Unit ID */
+		ipac_idtag_parse(&tlvp, (u_int8_t *)msg->l2h + 2,
+				 msgb_l2len(msg)-2);
+		DEBUGP(DMI, "\n");
+
+		if (!TLVP_PRESENT(&tlvp, IPAC_IDTAG_UNIT)) {
+			LOGP(DINP, LOGL_ERROR, "No Unit ID in ID RESPONSE !?!\n");
+			return -EIO;
+		}
+
+		/* lookup BTS, create sign_link, ... */
+		site_id = bts_id = trx_id = 0;
+		parse_unitid((char *)TLVP_VAL(&tlvp, IPAC_IDTAG_UNIT),
+			     &site_id, &bts_id, &trx_id);
+		ipbc = find_bts_by_unitid(ipp, site_id, bts_id);
+		if (!ipbc) {
+			/* We have not found an ipbc (per-bts proxy instance)
+			 * for this BTS yet.  The first connection of a new BTS must
+			 * be a OML connection.  We allocate the associated data structures,
+			 * and try to connect to the remote end */
+
+			return ipbc_alloc_connect(ipc, bfd, site_id, bts_id,
+						  trx_id, &tlvp, msg);
+			/* if this fails, the caller will clean up bfd */
+		} else {
+			struct sockaddr_in sin;
+			memset(&sin, 0, sizeof(sin));
+			sin.sin_family = AF_INET;
+			inet_aton(bsc_ipaddr, &sin.sin_addr);
+
+			DEBUGP(DINP, "Identified BTS %u/%u/%u\n",
+				site_id, bts_id, trx_id);
+
+			if ((bfd->priv_nr & 0xff) != RSL_FROM_BTS) {
+				LOGP(DINP, LOGL_ERROR, "Second OML connection from "
+				     "same BTS ?!?\n");
+				return 0;
+			}
+
+			if (trx_id > MAX_TRX) {
+				LOGP(DINP, LOGL_ERROR, "We don't support more "
+				     "than %u TRX\n", MAX_TRX);
+				return -EINVAL;
+			}
+
+			ipc->bts_conn = ipbc;
+			/* store TRX number in higher 8 bit of the bfd private number */
+			bfd->priv_nr |= trx_id << 8;
+			ipbc->rsl_conn[trx_id] = ipc;
+
+			/* Create RSL TCP connection towards BSC */
+			sin.sin_port = htons(IPA_TCP_PORT_RSL);
+			ipbc->bsc_rsl_conn[trx_id] =
+				connect_bsc(&sin, RSL_TO_BSC | (trx_id << 8), ipbc);
+			if (!ipbc->bsc_oml_conn)
+				return -EIO;
+			DEBUGP(DINP, "(%u/%u/%u) Connected RSL to BSC\n",
+				site_id, bts_id, trx_id);
+		}
+		break;
+	case IPAC_MSGT_ID_GET:
+		DEBUGP(DMI, "ID_GET\n");
+		if ((bfd->priv_nr & 0xff) != OML_TO_BSC &&
+		    (bfd->priv_nr & 0xff) != RSL_TO_BSC) {
+			DEBUGP(DINP, "IDentity REQuest from BTS ?!?\n");
+			return -EIO;
+		}
+		ipbc = ipc->bts_conn;
+		if (!ipbc) {
+			DEBUGP(DINP, "ID_GET from BSC before we have ID_RESP from BTS\n");
+			return -EIO;
+		}
+		ret = write(bfd->fd, ipbc->id_resp, ipbc->id_resp_len);
+		break;
+	case IPAC_MSGT_ID_ACK:
+		DEBUGP(DMI, "ID_ACK? -> ACK!\n");
+		ret = write(bfd->fd, id_ack, sizeof(id_ack));
+		break;
+	default:
+		LOGP(DMI, LOGL_ERROR, "Unhandled IPA type; %d\n", msg_type);
+		return 1;
+		break;
+	}
+	return 0;
+}
+
+struct msgb *ipaccess_read_msg(struct bsc_fd *bfd, int *error)
+{
+	struct msgb *msg = msgb_alloc(PROXY_ALLOC_SIZE, "Abis/IP");
+	struct ipaccess_head *hh;
+	int len, ret = 0;
+
+	if (!msg) {
+		*error = -ENOMEM;
+		return NULL;
+	}
+
+	/* first read our 3-byte header */
+	hh = (struct ipaccess_head *) msg->data;
+	ret = recv(bfd->fd, msg->data, 3, 0);
+	if (ret < 0) {
+		if (errno != EAGAIN)
+			LOGP(DINP, LOGL_ERROR, "recv error: %s\n", strerror(errno));
+		msgb_free(msg);
+		*error = ret;
+		return NULL;
+	} else if (ret == 0) {
+		msgb_free(msg);
+		*error = ret;
+		return NULL;
+	}
+
+	msgb_put(msg, ret);
+
+	/* then read te length as specified in header */
+	msg->l2h = msg->data + sizeof(*hh);
+	len = ntohs(hh->len);
+	ret = recv(bfd->fd, msg->l2h, len, 0);
+	if (ret < len) {
+		LOGP(DINP, LOGL_ERROR, "short read!\n");
+		msgb_free(msg);
+		*error = -EIO;
+		return NULL;
+	}
+	msgb_put(msg, ret);
+
+	return msg;
+}
+
+static struct ipa_proxy_conn *ipc_by_priv_nr(struct ipa_bts_conn *ipbc,
+					     unsigned int priv_nr)
+{
+	struct ipa_proxy_conn *bsc_conn;
+	unsigned int trx_id = priv_nr >> 8;
+
+	switch (priv_nr & 0xff) {
+	case OML_FROM_BTS: /* incoming OML data from BTS, forward to BSC OML */
+		bsc_conn = ipbc->bsc_oml_conn;
+		break;
+	case RSL_FROM_BTS: /* incoming RSL data from BTS, forward to BSC RSL */
+		bsc_conn = ipbc->bsc_rsl_conn[trx_id];
+		break;
+	case OML_TO_BSC: /* incoming OML data from BSC, forward to BTS OML */
+		bsc_conn = ipbc->oml_conn;
+		break;
+	case RSL_TO_BSC: /* incoming RSL data from BSC, forward to BTS RSL */
+		bsc_conn = ipbc->rsl_conn[trx_id];
+		break;
+	default:
+		bsc_conn = NULL;
+		break;
+	}
+	return bsc_conn;
+}
+
+static void reconn_tmr_cb(void *data)
+{
+	struct ipa_proxy *ipp = data;
+	struct ipa_bts_conn *ipbc;
+	struct sockaddr_in sin;
+	int i;
+
+	DEBUGP(DINP, "Running reconnect timer\n");
+
+	memset(&sin, 0, sizeof(sin));
+	sin.sin_family = AF_INET;
+	inet_aton(bsc_ipaddr, &sin.sin_addr);
+
+	llist_for_each_entry(ipbc, &ipp->bts_list, list) {
+		/* if OML to BSC is dead, try to restore it */
+		if (ipbc->oml_conn && !ipbc->bsc_oml_conn) {
+			sin.sin_port = htons(IPA_TCP_PORT_OML);
+			logp_ipbc_uid(DINP, LOGL_NOTICE, ipbc, 0);
+			LOGPC(DINP, LOGL_NOTICE, "OML Trying to reconnect\n");
+			ipbc->bsc_oml_conn = connect_bsc(&sin, OML_TO_BSC, ipbc);
+			if (!ipbc->bsc_oml_conn)
+				goto reschedule;
+			logp_ipbc_uid(DINP, LOGL_NOTICE, ipbc, 0);
+			LOGPC(DINP, LOGL_NOTICE, "OML Reconnected\n");
+		}
+		/* if we (still) don't have a OML connection, skip RSL */
+		if (!ipbc->oml_conn || !ipbc->bsc_oml_conn)
+			continue;
+
+		for (i = 0; i < ARRAY_SIZE(ipbc->rsl_conn); i++) {
+			unsigned int priv_nr;
+			/* don't establish RSL links which we don't have */
+			if (!ipbc->rsl_conn[i])
+				continue;
+			if (ipbc->bsc_rsl_conn[i])
+				continue;
+			priv_nr = ipbc->rsl_conn[i]->fd.priv_nr;
+			priv_nr &= ~0xff;
+			priv_nr |= RSL_TO_BSC;
+			sin.sin_port = htons(IPA_TCP_PORT_RSL);
+			logp_ipbc_uid(DINP, LOGL_NOTICE, ipbc, priv_nr >> 8);
+			LOGPC(DINP, LOGL_NOTICE, "RSL Trying to reconnect\n");
+			ipbc->bsc_rsl_conn[i] = connect_bsc(&sin, priv_nr, ipbc);
+			if (!ipbc->bsc_rsl_conn)
+				goto reschedule;
+			logp_ipbc_uid(DINP, LOGL_NOTICE, ipbc, priv_nr >> 8);
+			LOGPC(DINP, LOGL_NOTICE, "RSL Reconnected\n");
+		}
+	}
+	return;
+
+reschedule:
+	bsc_schedule_timer(&ipp->reconn_timer, 5, 0);
+}
+
+static void handle_dead_socket(struct bsc_fd *bfd)
+{
+	struct ipa_proxy_conn *ipc = bfd->data;		/* local conn */
+	struct ipa_proxy_conn *bsc_conn;		/* remote conn */
+	struct ipa_bts_conn *ipbc = ipc->bts_conn;
+	unsigned int trx_id = bfd->priv_nr >> 8;
+	struct msgb *msg, *msg2;
+
+	bsc_unregister_fd(bfd);
+	close(bfd->fd);
+	bfd->fd = -1;
+
+	/* FIXME: clear tx_queue, remove all references, etc. */
+	llist_for_each_entry_safe(msg, msg2, &ipc->tx_queue, list)
+		msgb_free(msg);
+
+	switch (bfd->priv_nr & 0xff) {
+	case OML_FROM_BTS: /* incoming OML data from BTS, forward to BSC OML */
+		ipbc->oml_conn = NULL;
+		bsc_conn = ipbc->bsc_oml_conn;
+		/* close the connection to the BSC */
+		bsc_unregister_fd(&bsc_conn->fd);
+		close(bsc_conn->fd.fd);
+		llist_for_each_entry_safe(msg, msg2, &bsc_conn->tx_queue, list)
+			msgb_free(msg);
+		talloc_free(bsc_conn);
+		ipbc->bsc_oml_conn = NULL;
+		/* FIXME: do we need to delete the entire ipbc ? */
+		break;
+	case RSL_FROM_BTS: /* incoming RSL data from BTS, forward to BSC RSL */
+		ipbc->rsl_conn[trx_id] = NULL;
+		bsc_conn = ipbc->bsc_rsl_conn[trx_id];
+		/* close the connection to the BSC */
+		bsc_unregister_fd(&bsc_conn->fd);
+		close(bsc_conn->fd.fd);
+		llist_for_each_entry_safe(msg, msg2, &bsc_conn->tx_queue, list)
+			msgb_free(msg);
+		talloc_free(bsc_conn);
+		ipbc->bsc_rsl_conn[trx_id] = NULL;
+		break;
+	case OML_TO_BSC: /* incoming OML data from BSC, forward to BTS OML */
+		ipbc->bsc_oml_conn = NULL;
+		bsc_conn = ipbc->oml_conn;
+		/* start reconnect timer */
+		bsc_schedule_timer(&ipp->reconn_timer, 5, 0);
+		break;
+	case RSL_TO_BSC: /* incoming RSL data from BSC, forward to BTS RSL */
+		ipbc->bsc_rsl_conn[trx_id] = NULL;
+		bsc_conn = ipbc->rsl_conn[trx_id];
+		/* start reconnect timer */
+		bsc_schedule_timer(&ipp->reconn_timer, 5, 0);
+		break;
+	default:
+		bsc_conn = NULL;
+		break;
+	}
+
+	talloc_free(ipc);
+}
+
+static void patch_gprs_msg(struct ipa_bts_conn *ipbc, int priv_nr, struct msgb *msg)
+{
+	uint8_t *nsvci;
+
+	if ((priv_nr & 0xff) != OML_FROM_BTS && (priv_nr & 0xff) != OML_TO_BSC)
+		return;
+
+	if (msgb_l2len(msg) != 39)
+		return;
+
+	/*
+	 * Check if this is a IPA Set Attribute or IPA Set Attribute ACK
+	 * and if the FOM Class is GPRS NSVC0 and then we will patch it.
+	 *
+	 * The patch assumes the message looks like the one from the trace
+	 * but we only match messages with a specific size anyway... So
+	 * this hack should work just fine.
+	 */
+
+	if (msg->l2h[0] == 0x10 && msg->l2h[1] == 0x80 &&
+	    msg->l2h[2] == 0x00 && msg->l2h[3] == 0x15 &&
+	    msg->l2h[18] == 0xf5 && msg->l2h[19] == 0xf2) {
+		nsvci = &msg->l2h[23];
+		ipbc->gprs_orig_port =  *(u_int16_t *)(nsvci+8);
+		ipbc->gprs_orig_ip = *(u_int32_t *)(nsvci+10);
+		*(u_int16_t *)(nsvci+8) = htons(ipbc->gprs_local_port);
+		*(u_int32_t *)(nsvci+10) = ipbc->ipp->listen_addr.s_addr;
+	} else if (msg->l2h[0] == 0x10 && msg->l2h[1] == 0x80 &&
+	    msg->l2h[2] == 0x00 && msg->l2h[3] == 0x15 &&
+	    msg->l2h[18] == 0xf6 && msg->l2h[19] == 0xf2) {
+		nsvci = &msg->l2h[23];
+		*(u_int16_t *)(nsvci+8) = ipbc->gprs_orig_port;
+		*(u_int32_t *)(nsvci+10) = ipbc->gprs_orig_ip;
+	}
+}
+
+static int handle_tcp_read(struct bsc_fd *bfd)
+{
+	struct ipa_proxy_conn *ipc = bfd->data;
+	struct ipa_bts_conn *ipbc = ipc->bts_conn;
+	struct ipa_proxy_conn *bsc_conn;
+	struct msgb *msg;
+	struct ipaccess_head *hh;
+	int ret = 0;
+	char *btsbsc;
+
+	if ((bfd->priv_nr & 0xff) <= 2)
+		btsbsc = "BTS";
+	else
+		btsbsc = "BSC";
+
+	msg = ipaccess_read_msg(bfd, &ret);
+	if (!msg) {
+		if (ret == 0) {
+			logp_ipbc_uid(DINP, LOGL_NOTICE, ipbc, bfd->priv_nr >> 8);
+			LOGPC(DINP, LOGL_NOTICE, "%s disappeared, "
+			     "dead socket\n", btsbsc);
+			handle_dead_socket(bfd);
+		}
+		return ret;
+	}
+
+	msgb_put(msg, ret);
+	logp_ipbc_uid(DMI, LOGL_DEBUG, ipbc, bfd->priv_nr >> 8);
+	DEBUGPC(DMI, "RX<-%s: %s\n", btsbsc, hexdump(msg->data, msg->len));
+
+	hh = (struct ipaccess_head *) msg->data;
+	if (hh->proto == IPAC_PROTO_IPACCESS) {
+		ret = ipaccess_rcvmsg(ipc, msg, bfd);
+		if (ret < 0) {
+			bsc_unregister_fd(bfd);
+			close(bfd->fd);
+			bfd->fd = -1;
+			talloc_free(bfd);
+			msgb_free(msg);
+			return ret;
+		} else if (ret == 0) {
+			/* we do not forward parts of the CCM protocol
+			 * through the proxy but rather terminate it ourselves. */
+			msgb_free(msg);
+			return ret;
+		}
+	}
+
+	if (!ipbc) {
+		LOGP(DINP, LOGL_ERROR,
+		     "received %s packet but no ipc->bts_conn?!?\n", btsbsc);
+		msgb_free(msg);
+		return -EIO;
+	}
+
+	bsc_conn = ipc_by_priv_nr(ipbc, bfd->priv_nr);
+	if (bsc_conn) {
+		if (gprs_ns_ipaddr)
+			patch_gprs_msg(ipbc, bfd->priv_nr, msg);
+		/* enqueue packet towards BSC */
+		msgb_enqueue(&bsc_conn->tx_queue, msg);
+		/* mark respective filedescriptor as 'we want to write' */
+		bsc_conn->fd.when |= BSC_FD_WRITE;
+	} else {
+		logp_ipbc_uid(DINP, LOGL_INFO, ipbc, bfd->priv_nr >> 8);
+		LOGPC(DINP, LOGL_INFO, "Dropping packet from %s, "
+		     "since remote connection is dead\n", btsbsc);
+		msgb_free(msg);
+	}
+
+	return ret;
+}
+
+/* a TCP socket is ready to be written to */
+static int handle_tcp_write(struct bsc_fd *bfd)
+{
+	struct ipa_proxy_conn *ipc = bfd->data;
+	struct ipa_bts_conn *ipbc = ipc->bts_conn;
+	struct llist_head *lh;
+	struct msgb *msg;
+	char *btsbsc;
+	int ret;
+
+	if ((bfd->priv_nr & 0xff) <= 2)
+		btsbsc = "BTS";
+	else
+		btsbsc = "BSC";
+
+
+	/* get the next msg for this timeslot */
+	if (llist_empty(&ipc->tx_queue)) {
+		bfd->when &= ~BSC_FD_WRITE;
+		return 0;
+	}
+	lh = ipc->tx_queue.next;
+	llist_del(lh);
+	msg = llist_entry(lh, struct msgb, list);
+
+	logp_ipbc_uid(DMI, LOGL_DEBUG, ipbc, bfd->priv_nr >> 8);
+	DEBUGPC(DMI, "TX %04x: %s\n", bfd->priv_nr,
+		hexdump(msg->data, msg->len));
+
+	ret = send(bfd->fd, msg->data, msg->len, 0);
+	msgb_free(msg);
+
+	if (ret == 0) {
+		logp_ipbc_uid(DINP, LOGL_NOTICE, ipbc, bfd->priv_nr >> 8);
+		LOGP(DINP, LOGL_NOTICE, "%s disappeared, dead socket\n", btsbsc);
+		handle_dead_socket(bfd);
+	}
+
+	return ret;
+}
+
+/* callback from select.c in case one of the fd's can be read/written */
+static int ipaccess_fd_cb(struct bsc_fd *bfd, unsigned int what)
+{
+	int rc = 0;
+
+	if (what & BSC_FD_READ) {
+		rc = handle_tcp_read(bfd);
+		if (rc < 0)
+			return rc;
+	}
+	if (what & BSC_FD_WRITE)
+		rc = handle_tcp_write(bfd);
+
+	return rc;
+}
+
+/* callback of the listening filedescriptor */
+static int listen_fd_cb(struct bsc_fd *listen_bfd, unsigned int what)
+{
+	int ret;
+	struct ipa_proxy_conn *ipc;
+	struct bsc_fd *bfd;
+	struct sockaddr_in sa;
+	socklen_t sa_len = sizeof(sa);
+
+	if (!(what & BSC_FD_READ))
+		return 0;
+
+	ret = accept(listen_bfd->fd, (struct sockaddr *) &sa, &sa_len);
+	if (ret < 0) {
+		perror("accept");
+		return ret;
+	}
+	DEBUGP(DINP, "accept()ed new %s link from %s\n",
+		(listen_bfd->priv_nr & 0xff) == OML_FROM_BTS ? "OML" : "RSL",
+		inet_ntoa(sa.sin_addr));
+
+	ipc = alloc_conn();
+	if (!ipc) {
+		close(ret);
+		return -ENOMEM;
+	}
+
+	bfd = &ipc->fd;
+	bfd->fd = ret;
+	bfd->data = ipc;
+	bfd->priv_nr = listen_bfd->priv_nr;
+	bfd->cb = ipaccess_fd_cb;
+	bfd->when = BSC_FD_READ;
+	ret = bsc_register_fd(bfd);
+	if (ret < 0) {
+		LOGP(DINP, LOGL_ERROR, "could not register FD\n");
+		close(bfd->fd);
+		talloc_free(ipc);
+		return ret;
+	}
+
+	/* Request ID. FIXME: request LOCATION, HW/SW VErsion, Unit Name, Serno */
+	ret = write(bfd->fd, id_req, sizeof(id_req));
+
+	return 0;
+}
+
+static void send_ns(int fd, const char *buf, int size, struct in_addr ip, int port)
+{
+	int ret;
+	struct sockaddr_in addr;
+	socklen_t len = sizeof(addr);
+	memset(&addr, 0, sizeof(addr));
+
+	addr.sin_family = AF_INET;
+	addr.sin_port = htons(port);
+	addr.sin_addr = ip;
+
+	ret = sendto(fd, buf, size, 0, (struct sockaddr *) &addr, len);
+	if (ret < 0) {
+		LOGP(DINP, LOGL_ERROR, "Failed to forward GPRS message.\n");
+	}
+}
+
+static int gprs_ns_cb(struct bsc_fd *bfd, unsigned int what)
+{
+	struct ipa_bts_conn *bts;
+	char buf[4096];
+	int ret;
+	struct sockaddr_in sock;
+	socklen_t len = sizeof(sock);
+
+	/* 1. get the data... */
+	ret = recvfrom(bfd->fd, buf, sizeof(buf), 0, (struct sockaddr *) &sock, &len);
+	if (ret < 0) {
+		LOGP(DINP, LOGL_ERROR, "Failed to recv GPRS NS msg: %s.\n", strerror(errno));
+		return -1;
+	}
+
+	bts = bfd->data;
+
+	/* 2. figure out where to send it to */
+	if (memcmp(&sock.sin_addr, &ipp->gprs_addr, sizeof(sock.sin_addr)) == 0) {
+		LOGP(DINP, LOGL_DEBUG, "GPRS NS msg from network.\n");
+		send_ns(bfd->fd, buf, ret, bts->bts_addr, 23000);
+	} else if (memcmp(&sock.sin_addr, &bts->bts_addr, sizeof(sock.sin_addr)) == 0) {
+		LOGP(DINP, LOGL_DEBUG, "GPRS NS msg from BTS.\n");
+		send_ns(bfd->fd, buf, ret, ipp->gprs_addr, 23000);
+	} else {
+		LOGP(DINP, LOGL_ERROR, "Unknown GPRS source: %s\n", inet_ntoa(sock.sin_addr));
+	}
+
+	return 0;
+}
+
+static int make_listen_sock(struct bsc_fd *bfd, u_int16_t port, int priv_nr,
+		     int (*cb)(struct bsc_fd *fd, unsigned int what))
+{
+	struct sockaddr_in addr;
+	int ret, on = 1;
+
+	bfd->fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
+	bfd->cb = cb;
+	bfd->when = BSC_FD_READ;
+	bfd->priv_nr = priv_nr;
+
+	memset(&addr, 0, sizeof(addr));
+	addr.sin_family = AF_INET;
+	addr.sin_port = htons(port);
+	if (!listen_ipaddr)
+		addr.sin_addr.s_addr = INADDR_ANY;
+	else
+		inet_aton(listen_ipaddr, &addr.sin_addr);
+
+	setsockopt(bfd->fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
+
+	ret = bind(bfd->fd, (struct sockaddr *) &addr, sizeof(addr));
+	if (ret < 0) {
+		LOGP(DINP, LOGL_ERROR,
+			"Could not bind listen socket for IP %s with error: %s.\n",
+			listen_ipaddr, strerror(errno));
+		return -EIO;
+	}
+
+	ret = listen(bfd->fd, 1);
+	if (ret < 0) {
+		perror("listen");
+		return ret;
+	}
+
+	ret = bsc_register_fd(bfd);
+	if (ret < 0) {
+		perror("register_listen_fd");
+		return ret;
+	}
+	return 0;
+}
+
+static int make_gprs_sock(struct bsc_fd *bfd, int (*cb)(struct bsc_fd*,unsigned int), void *data)
+{
+	struct sockaddr_in addr;
+	int ret;
+
+	bfd->fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
+	bfd->cb = cb;
+	bfd->data = data;
+	bfd->when = BSC_FD_READ;
+
+	memset(&addr, 0, sizeof(addr));
+	addr.sin_family = AF_INET;
+	addr.sin_port = 0;
+	inet_aton(listen_ipaddr, &addr.sin_addr);
+
+	ret = bind(bfd->fd, (struct sockaddr *) &addr, sizeof(addr));
+	if (ret < 0) {
+		LOGP(DINP, LOGL_ERROR,
+			"Could not bind n socket for IP %s with error: %s.\n",
+			listen_ipaddr, strerror(errno));
+		return -EIO;
+	}
+
+	ret = bsc_register_fd(bfd);
+	if (ret < 0) {
+		perror("register_listen_fd");
+		return ret;
+	}
+	return 0;
+}
+
+/* Actively connect to a BSC.  */
+static struct ipa_proxy_conn *connect_bsc(struct sockaddr_in *sa, int priv_nr, void *data)
+{
+	struct ipa_proxy_conn *ipc;
+	struct bsc_fd *bfd;
+	int ret, on = 1;
+
+	ipc = alloc_conn();
+	if (!ipc)
+		return NULL;
+
+	ipc->bts_conn = data;
+
+	bfd = &ipc->fd;
+	bfd->fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
+	bfd->cb = ipaccess_fd_cb;
+	bfd->when = BSC_FD_READ | BSC_FD_WRITE;
+	bfd->data = ipc;
+	bfd->priv_nr = priv_nr;
+
+	setsockopt(bfd->fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
+
+	ret = connect(bfd->fd, (struct sockaddr *) sa, sizeof(*sa));
+	if (ret < 0) {
+		LOGP(DINP, LOGL_ERROR, "Could not connect socket: %s\n",
+		     inet_ntoa(sa->sin_addr));
+		close(bfd->fd);
+		talloc_free(ipc);
+		return NULL;
+	}
+
+	/* pre-fill tx_queue with identity request */
+	ret = bsc_register_fd(bfd);
+	if (ret < 0) {
+		close(bfd->fd);
+		talloc_free(ipc);
+		return NULL;
+	}
+
+	return ipc;
+}
+
+static int ipaccess_proxy_setup(void)
+{
+	int ret;
+
+	ipp = talloc_zero(tall_bsc_ctx, struct ipa_proxy);
+	if (!ipp)
+		return -ENOMEM;
+	INIT_LLIST_HEAD(&ipp->bts_list);
+	ipp->reconn_timer.cb = reconn_tmr_cb;
+	ipp->reconn_timer.data = ipp;
+
+	/* Listen for OML connections */
+	ret = make_listen_sock(&ipp->oml_listen_fd, IPA_TCP_PORT_OML,
+				OML_FROM_BTS, listen_fd_cb);
+	if (ret < 0)
+		return ret;
+
+	/* Listen for RSL connections */
+	ret = make_listen_sock(&ipp->rsl_listen_fd, IPA_TCP_PORT_RSL,
+				RSL_FROM_BTS, listen_fd_cb);
+
+	if (ret < 0)
+		return ret;
+
+	/* Connect the GPRS NS Socket */
+	if (gprs_ns_ipaddr) {
+		inet_aton(gprs_ns_ipaddr, &ipp->gprs_addr);
+		inet_aton(listen_ipaddr, &ipp->listen_addr);
+	}
+
+	return ret;
+}
+
+static void signal_handler(int signal)
+{
+	fprintf(stdout, "signal %u received\n", signal);
+
+	switch (signal) {
+	case SIGABRT:
+		/* in case of abort, we want to obtain a talloc report
+		 * and then return to the caller, who will abort the process */
+	case SIGUSR1:
+		talloc_report_full(tall_bsc_ctx, stderr);
+		break;
+	default:
+		break;
+	}
+}
+
+static void print_help()
+{
+	printf(" ipaccess-proxy is a proxy BTS.\n");
+	printf(" -h --help. This help text.\n");
+	printf(" -l --listen IP. The ip to listen to.\n");
+	printf(" -b --bsc IP. The BSC IP address.\n");
+	printf(" -g --gprs IP. Take GPRS NS from that IP.\n");
+	printf("\n");
+	printf(" -s --disable-color. Disable the color inside the logging message.\n");
+	printf(" -e --log-level number. Set the global loglevel.\n");
+	printf(" -T --timestamp. Prefix every log message with a timestamp.\n");
+	printf(" -V --version. Print the version of OpenBSC.\n");
+}
+
+static void print_usage()
+{
+	printf("Usage: ipaccess-proxy\n");
+}
+
+static void handle_options(int argc, char** argv)
+{
+	while (1) {
+		int option_index = 0, c;
+		static struct option long_options[] = {
+			{"help", 0, 0, 'h'},
+			{"disable-color", 0, 0, 's'},
+			{"timestamp", 0, 0, 'T'},
+			{"log-level", 1, 0, 'e'},
+			{"listen", 1, 0, 'l'},
+			{"bsc", 1, 0, 'b'},
+			{"udp", 1, 0, 'u'},
+			{0, 0, 0, 0}
+		};
+
+		c = getopt_long(argc, argv, "hsTe:l:b:g:",
+				long_options, &option_index);
+		if (c == -1)
+			break;
+
+		switch (c) {
+		case 'h':
+			print_usage();
+			print_help();
+			exit(0);
+		case 'l':
+			listen_ipaddr = optarg;
+			break;
+		case 'b':
+			bsc_ipaddr = optarg;
+			break;
+		case 'g':
+			gprs_ns_ipaddr = optarg;
+			break;
+		case 's':
+			log_set_use_color(stderr_target, 0);
+			break;
+		case 'T':
+			log_set_print_timestamp(stderr_target, 1);
+			break;
+		case 'e':
+			log_set_log_level(stderr_target, atoi(optarg));
+			break;
+		default:
+			/* ignore */
+			break;
+		}
+	}
+}
+
+int main(int argc, char **argv)
+{
+	int rc;
+
+	listen_ipaddr = "192.168.100.11";
+	bsc_ipaddr = "192.168.100.239";
+
+	tall_bsc_ctx = talloc_named_const(NULL, 1, "ipaccess-proxy");
+
+	log_init(&log_info);
+	stderr_target = log_target_create_stderr();
+	log_add_target(stderr_target);
+	log_set_all_filter(stderr_target, 1);
+	log_parse_category_mask(stderr_target, "DINP:DMI");
+
+	handle_options(argc, argv);
+
+	rc = ipaccess_proxy_setup();
+	if (rc < 0)
+		exit(1);
+
+	signal(SIGUSR1, &signal_handler);
+	signal(SIGABRT, &signal_handler);
+
+	while (1) {
+		bsc_select_main(0);
+	}
+}
diff --git a/src/ipaccess/network_listen.c b/src/ipaccess/network_listen.c
new file mode 100644
index 000000000..aaf7c974a
--- /dev/null
+++ b/src/ipaccess/network_listen.c
@@ -0,0 +1,251 @@
+/* ip.access nanoBTS network listen mode */
+
+/* (C) 2009-2010 by Harald Welte <laforge@gnumonks.org>
+ *
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <stdint.h>
+
+#include <arpa/inet.h>
+
+#include <osmocore/talloc.h>
+#include <osmocore/timer.h>
+#include <osmocore/rxlev_stat.h>
+#include <osmocore/gsm48_ie.h>
+
+#include <openbsc/gsm_data.h>
+#include <openbsc/abis_nm.h>
+#include <openbsc/signal.h>
+#include <openbsc/debug.h>
+
+#define WHITELIST_MAX_SIZE ((NUM_ARFCNS*2)+2+1)
+
+int ipac_rxlevstat2whitelist(uint16_t *buf, const struct rxlev_stats *st, uint8_t min_rxlev,
+			     uint16_t max_num_arfcns)
+{
+	int i;
+	unsigned int num_arfcn = 0;
+
+	for (i = NUM_RXLEVS-1; i >= min_rxlev; i--) {
+		int16_t arfcn = -1;
+
+		while ((arfcn = rxlev_stat_get_next(st, i, arfcn)) >= 0) {
+			*buf++ = htons(arfcn);
+			num_arfcn++;
+
+		}
+
+		if (num_arfcn > max_num_arfcns)
+			break;
+	}
+
+	return num_arfcn;
+}
+
+enum ipac_test_state {
+	IPAC_TEST_S_IDLE,
+	IPAC_TEST_S_RQD,
+	IPAC_TEST_S_EXEC,
+	IPAC_TEST_S_PARTIAL,
+};
+
+int ipac_nwl_test_start(struct gsm_bts_trx *trx, uint8_t testnr,
+			const uint8_t *phys_conf, unsigned int phys_conf_len)
+{
+	struct msgb *msg;
+
+	if (trx->ipaccess.test_state != IPAC_TEST_S_IDLE) {
+		fprintf(stderr, "Cannot start test in state %u\n", trx->ipaccess.test_state);
+		return -EINVAL;
+	}
+
+	switch (testnr) {
+	case NM_IPACC_TESTNO_CHAN_USAGE:
+	case NM_IPACC_TESTNO_BCCH_CHAN_USAGE:
+		rxlev_stat_reset(&trx->ipaccess.rxlev_stat);
+		break;
+	}
+
+	msg = msgb_alloc_headroom(phys_conf_len+256, 128, "OML");
+
+	if (phys_conf && phys_conf_len) {
+		uint8_t *payload;
+		/* first put the phys conf header */
+		msgb_tv16_put(msg, NM_ATT_PHYS_CONF, phys_conf_len);
+		payload = msgb_put(msg, phys_conf_len);
+		memcpy(payload, phys_conf, phys_conf_len);
+	}
+
+	abis_nm_perform_test(trx->bts, NM_OC_RADIO_CARRIER, 0, trx->nr, 0xff,
+			     testnr, 1, msg);
+	trx->ipaccess.test_nr = testnr;
+
+	/* FIXME: start safety timer until when test is supposed to complete */
+
+	return 0;
+}
+
+static uint16_t last_arfcn;
+static struct gsm_sysinfo_freq nwl_si_freq[1024];
+#define FREQ_TYPE_NCELL_2	0x04 /* sub channel of SI 2 */
+#define FREQ_TYPE_NCELL_2bis	0x08 /* sub channel of SI 2bis */
+#define FREQ_TYPE_NCELL_2ter	0x10 /* sub channel of SI 2ter */
+
+struct ipacc_ferr_elem {
+	int16_t freq_err;
+	uint8_t freq_qual;
+	uint8_t arfcn;
+} __attribute__((packed));
+
+struct ipacc_cusage_elem {
+	uint16_t arfcn:10,
+		  rxlev:6;
+} __attribute__ ((packed));
+
+static int test_rep(void *_msg)
+{
+	struct msgb *msg = _msg;
+	struct abis_om_fom_hdr *foh = msgb_l3(msg);
+	uint16_t test_rep_len, ferr_list_len;
+	struct ipacc_ferr_elem *ife;
+	struct ipac_bcch_info binfo;
+	int i, rc;
+
+	DEBUGP(DNM, "TEST REPORT: ");
+
+	if (foh->data[0] != NM_ATT_TEST_NO ||
+	    foh->data[2] != NM_ATT_TEST_REPORT)
+		return -EINVAL;
+
+	DEBUGPC(DNM, "test_no=0x%02x ", foh->data[1]);
+	/* data[2] == NM_ATT_TEST_REPORT */
+	/* data[3..4]: test_rep_len */
+	test_rep_len = ntohs(*(uint16_t *) &foh->data[3]);
+	/* data[5]: ip.access test result */
+	DEBUGPC(DNM, "tst_res=%s\n", ipacc_testres_name(foh->data[5]));
+
+	/* data[6]: ip.access nested IE. 3 == freq_err_list */
+	switch (foh->data[6]) {
+	case NM_IPAC_EIE_FREQ_ERR_LIST:
+		/* data[7..8]: length of ferr_list */
+		ferr_list_len = ntohs(*(uint16_t *) &foh->data[7]);
+
+		/* data[9...]: frequency error list elements */
+		for (i = 0; i < ferr_list_len; i+= sizeof(*ife)) {
+			ife = (struct ipacc_ferr_elem *) (foh->data + 9 + i);
+			DEBUGP(DNM, "==> ARFCN %4u, Frequency Error %6hd\n",
+			ife->arfcn, ntohs(ife->freq_err));
+		}
+		break;
+	case NM_IPAC_EIE_CHAN_USE_LIST:
+		/* data[7..8]: length of ferr_list */
+		ferr_list_len = ntohs(*(uint16_t *) &foh->data[7]);
+
+		/* data[9...]: channel usage list elements */
+		for (i = 0; i < ferr_list_len; i+= 2) {
+			uint16_t *cu_ptr = (uint16_t *)(foh->data + 9 + i);
+			uint16_t cu = ntohs(*cu_ptr);
+			uint16_t arfcn = cu & 0x3ff;
+			uint8_t rxlev = cu >> 10;
+			DEBUGP(DNM, "==> ARFCN %4u, RxLev %2u\n", arfcn, rxlev);
+			rxlev_stat_input(&msg->trx->ipaccess.rxlev_stat,
+					 arfcn, rxlev);
+		}
+		break;
+	case NM_IPAC_EIE_BCCH_INFO_TYPE:
+		break;
+	case NM_IPAC_EIE_BCCH_INFO:
+		rc = ipac_parse_bcch_info(&binfo, foh->data+6);
+		if (rc < 0) {
+			DEBUGP(DNM, "BCCH Info parsing failed\n");
+			break;
+		}
+		DEBUGP(DNM, "==> ARFCN %u, RxLev %2u, RxQual %2u: %3d-%d, LAC %d CI %d BSIC %u\n",
+			binfo.arfcn, binfo.rx_lev, binfo.rx_qual,
+			binfo.cgi.mcc, binfo.cgi.mnc,
+			binfo.cgi.lac, binfo.cgi.ci, binfo.bsic);
+
+		if (binfo.arfcn != last_arfcn) {
+			/* report is on a new arfcn, need to clear channel list */
+			memset(nwl_si_freq, 0, sizeof(nwl_si_freq));
+			last_arfcn = binfo.arfcn;
+		}
+		if (binfo.info_type & IPAC_BINF_NEIGH_BA_SI2) {
+			DEBUGP(DNM, "BA SI2: %s\n", hexdump(binfo.ba_list_si2, sizeof(binfo.ba_list_si2)));
+			gsm48_decode_freq_list(nwl_si_freq, binfo.ba_list_si2, sizeof(binfo.ba_list_si2),
+						0x8c, FREQ_TYPE_NCELL_2);
+		}
+		if (binfo.info_type & IPAC_BINF_NEIGH_BA_SI2bis) {
+			DEBUGP(DNM, "BA SI2bis: %s\n", hexdump(binfo.ba_list_si2bis, sizeof(binfo.ba_list_si2bis)));
+			gsm48_decode_freq_list(nwl_si_freq, binfo.ba_list_si2bis, sizeof(binfo.ba_list_si2bis),
+						0x8e, FREQ_TYPE_NCELL_2bis);
+		}
+		if (binfo.info_type & IPAC_BINF_NEIGH_BA_SI2ter) {
+			DEBUGP(DNM, "BA SI2ter: %s\n", hexdump(binfo.ba_list_si2ter, sizeof(binfo.ba_list_si2ter)));
+			gsm48_decode_freq_list(nwl_si_freq, binfo.ba_list_si2ter, sizeof(binfo.ba_list_si2ter),
+						0x8e, FREQ_TYPE_NCELL_2ter);
+		}
+		for (i = 0; i < ARRAY_SIZE(nwl_si_freq); i++) {
+			if (nwl_si_freq[i].mask)
+				DEBUGP(DNM, "Neighbor Cell on ARFCN %u\n", i);
+		}
+		break;
+	default:
+		break;
+	}
+
+	switch (foh->data[5]) {
+	case NM_IPACC_TESTRES_SUCCESS:
+	case NM_IPACC_TESTRES_STOPPED:
+	case NM_IPACC_TESTRES_TIMEOUT:
+	case NM_IPACC_TESTRES_NO_CHANS:
+		msg->trx->ipaccess.test_state = IPAC_TEST_S_IDLE;
+		/* Send signal to notify higher layers of test completion */
+		DEBUGP(DNM, "dispatching S_IPAC_NWL_COMPLETE signal\n");
+		dispatch_signal(SS_IPAC_NWL, S_IPAC_NWL_COMPLETE, msg->trx);
+		break;
+	case NM_IPACC_TESTRES_PARTIAL:
+		msg->trx->ipaccess.test_state = IPAC_TEST_S_PARTIAL;
+		break;
+	}
+
+	return 0;
+}
+
+static int nwl_sig_cb(unsigned int subsys, unsigned int signal,
+		     void *handler_data, void *signal_data)
+{
+	switch (signal) {
+	case S_NM_TEST_REP:
+		return test_rep(signal_data);
+	default:
+		break;
+	}
+
+	return 0;
+}
+
+void ipac_nwl_init(void)
+{
+	register_signal_handler(SS_NM, nwl_sig_cb, NULL);
+}
diff --git a/src/libabis/Makefile.am b/src/libabis/Makefile.am
new file mode 100644
index 000000000..0df7b5a4a
--- /dev/null
+++ b/src/libabis/Makefile.am
@@ -0,0 +1,14 @@
+INCLUDES = $(all_includes) -I$(top_srcdir)/include -I$(top_builddir)
+AM_CFLAGS=-Wall $(LIBOSMOCORE_CFLAGS) $(LIBOSMOVTY_CFLAGS) $(COVERAGE_CFLAGS)
+AM_LDFLAGS = $(LIBOSMOCORE_LIBS) $(COVERAGE_LDFLAGS)
+
+noinst_LIBRARIES = libabis.a
+
+libabis_a_SOURCES = e1_input.c e1_input_vty.c \
+			input/misdn.c		\
+			input/ipaccess.c	\
+			input/hsl.c		\
+			input/dahdi.c		\
+			input/lapd.c
+
+EXTRA_DIST = input/lapd.h
diff --git a/src/libabis/Makefile.in b/src/libabis/Makefile.in
new file mode 100644
index 000000000..90d628791
--- /dev/null
+++ b/src/libabis/Makefile.in
@@ -0,0 +1,548 @@
+# Makefile.in generated by automake 1.11.1 from Makefile.am.
+# @configure_input@
+
+# Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
+# 2003, 2004, 2005, 2006, 2007, 2008, 2009  Free Software Foundation,
+# Inc.
+# This Makefile.in is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
+# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+# PARTICULAR PURPOSE.
+
+@SET_MAKE@
+
+VPATH = @srcdir@
+pkgdatadir = $(datadir)/@PACKAGE@
+pkgincludedir = $(includedir)/@PACKAGE@
+pkglibdir = $(libdir)/@PACKAGE@
+pkglibexecdir = $(libexecdir)/@PACKAGE@
+am__cd = CDPATH="$${ZSH_VERSION+.}$(PATH_SEPARATOR)" && cd
+install_sh_DATA = $(install_sh) -c -m 644
+install_sh_PROGRAM = $(install_sh) -c
+install_sh_SCRIPT = $(install_sh) -c
+INSTALL_HEADER = $(INSTALL_DATA)
+transform = $(program_transform_name)
+NORMAL_INSTALL = :
+PRE_INSTALL = :
+POST_INSTALL = :
+NORMAL_UNINSTALL = :
+PRE_UNINSTALL = :
+POST_UNINSTALL = :
+subdir = src/libabis
+DIST_COMMON = $(srcdir)/Makefile.am $(srcdir)/Makefile.in
+ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
+am__aclocal_m4_deps = $(top_srcdir)/configure.in
+am__configure_deps = $(am__aclocal_m4_deps) $(CONFIGURE_DEPENDENCIES) \
+	$(ACLOCAL_M4)
+mkinstalldirs = $(install_sh) -d
+CONFIG_HEADER = $(top_builddir)/bscconfig.h
+CONFIG_CLEAN_FILES =
+CONFIG_CLEAN_VPATH_FILES =
+LIBRARIES = $(noinst_LIBRARIES)
+AR = ar
+ARFLAGS = cru
+AM_V_AR = $(am__v_AR_$(V))
+am__v_AR_ = $(am__v_AR_$(AM_DEFAULT_VERBOSITY))
+am__v_AR_0 = @echo "  AR    " $@;
+AM_V_at = $(am__v_at_$(V))
+am__v_at_ = $(am__v_at_$(AM_DEFAULT_VERBOSITY))
+am__v_at_0 = @
+libabis_a_AR = $(AR) $(ARFLAGS)
+libabis_a_LIBADD =
+am_libabis_a_OBJECTS = e1_input.$(OBJEXT) e1_input_vty.$(OBJEXT) \
+	misdn.$(OBJEXT) ipaccess.$(OBJEXT) hsl.$(OBJEXT) \
+	dahdi.$(OBJEXT) lapd.$(OBJEXT)
+libabis_a_OBJECTS = $(am_libabis_a_OBJECTS)
+DEFAULT_INCLUDES = -I.@am__isrc@ -I$(top_builddir)
+depcomp = $(SHELL) $(top_srcdir)/depcomp
+am__depfiles_maybe = depfiles
+am__mv = mv -f
+AM_V_lt = $(am__v_lt_$(V))
+am__v_lt_ = $(am__v_lt_$(AM_DEFAULT_VERBOSITY))
+am__v_lt_0 = --silent
+COMPILE = $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) \
+	$(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS)
+AM_V_CC = $(am__v_CC_$(V))
+am__v_CC_ = $(am__v_CC_$(AM_DEFAULT_VERBOSITY))
+am__v_CC_0 = @echo "  CC    " $@;
+CCLD = $(CC)
+LINK = $(CCLD) $(AM_CFLAGS) $(CFLAGS) $(AM_LDFLAGS) $(LDFLAGS) -o $@
+AM_V_CCLD = $(am__v_CCLD_$(V))
+am__v_CCLD_ = $(am__v_CCLD_$(AM_DEFAULT_VERBOSITY))
+am__v_CCLD_0 = @echo "  CCLD  " $@;
+AM_V_GEN = $(am__v_GEN_$(V))
+am__v_GEN_ = $(am__v_GEN_$(AM_DEFAULT_VERBOSITY))
+am__v_GEN_0 = @echo "  GEN   " $@;
+SOURCES = $(libabis_a_SOURCES)
+DIST_SOURCES = $(libabis_a_SOURCES)
+ETAGS = etags
+CTAGS = ctags
+DISTFILES = $(DIST_COMMON) $(DIST_SOURCES) $(TEXINFOS) $(EXTRA_DIST)
+ACLOCAL = @ACLOCAL@
+AMTAR = @AMTAR@
+AM_DEFAULT_VERBOSITY = @AM_DEFAULT_VERBOSITY@
+AUTOCONF = @AUTOCONF@
+AUTOHEADER = @AUTOHEADER@
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+CC = @CC@
+CCDEPMODE = @CCDEPMODE@
+CFLAGS = @CFLAGS@
+COVERAGE_CFLAGS = @COVERAGE_CFLAGS@
+COVERAGE_LDFLAGS = @COVERAGE_LDFLAGS@
+CPP = @CPP@
+CPPFLAGS = @CPPFLAGS@
+CYGPATH_W = @CYGPATH_W@
+DEFS = @DEFS@
+DEPDIR = @DEPDIR@
+ECHO_C = @ECHO_C@
+ECHO_N = @ECHO_N@
+ECHO_T = @ECHO_T@
+EGREP = @EGREP@
+EXEEXT = @EXEEXT@
+GPRS_LIBGTP = @GPRS_LIBGTP@
+GREP = @GREP@
+INSTALL = @INSTALL@
+INSTALL_DATA = @INSTALL_DATA@
+INSTALL_PROGRAM = @INSTALL_PROGRAM@
+INSTALL_SCRIPT = @INSTALL_SCRIPT@
+INSTALL_STRIP_PROGRAM = @INSTALL_STRIP_PROGRAM@
+LDFLAGS = @LDFLAGS@
+LIBOBJS = @LIBOBJS@
+LIBOSMOCORE_CFLAGS = @LIBOSMOCORE_CFLAGS@
+LIBOSMOCORE_LIBS = @LIBOSMOCORE_LIBS@
+LIBOSMOSCCP_CFLAGS = @LIBOSMOSCCP_CFLAGS@
+LIBOSMOSCCP_LIBS = @LIBOSMOSCCP_LIBS@
+LIBOSMOVTY_CFLAGS = @LIBOSMOVTY_CFLAGS@
+LIBOSMOVTY_LIBS = @LIBOSMOVTY_LIBS@
+LIBS = @LIBS@
+LTLIBOBJS = @LTLIBOBJS@
+MAKEINFO = @MAKEINFO@
+MKDIR_P = @MKDIR_P@
+OBJEXT = @OBJEXT@
+PACKAGE = @PACKAGE@
+PACKAGE_BUGREPORT = @PACKAGE_BUGREPORT@
+PACKAGE_NAME = @PACKAGE_NAME@
+PACKAGE_STRING = @PACKAGE_STRING@
+PACKAGE_TARNAME = @PACKAGE_TARNAME@
+PACKAGE_URL = @PACKAGE_URL@
+PACKAGE_VERSION = @PACKAGE_VERSION@
+PATH_SEPARATOR = @PATH_SEPARATOR@
+PKG_CONFIG = @PKG_CONFIG@
+PKG_CONFIG_LIBDIR = @PKG_CONFIG_LIBDIR@
+PKG_CONFIG_PATH = @PKG_CONFIG_PATH@
+RANLIB = @RANLIB@
+SET_MAKE = @SET_MAKE@
+SHELL = @SHELL@
+STRIP = @STRIP@
+SYMBOL_VISIBILITY = @SYMBOL_VISIBILITY@
+VERSION = @VERSION@
+abs_builddir = @abs_builddir@
+abs_srcdir = @abs_srcdir@
+abs_top_builddir = @abs_top_builddir@
+abs_top_srcdir = @abs_top_srcdir@
+ac_ct_CC = @ac_ct_CC@
+am__include = @am__include@
+am__leading_dot = @am__leading_dot@
+am__quote = @am__quote@
+am__tar = @am__tar@
+am__untar = @am__untar@
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+datarootdir = @datarootdir@
+docdir = @docdir@
+dvidir = @dvidir@
+exec_prefix = @exec_prefix@
+host_alias = @host_alias@
+htmldir = @htmldir@
+includedir = @includedir@
+infodir = @infodir@
+install_sh = @install_sh@
+libdir = @libdir@
+libexecdir = @libexecdir@
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+localstatedir = @localstatedir@
+mandir = @mandir@
+mkdir_p = @mkdir_p@
+oldincludedir = @oldincludedir@
+pdfdir = @pdfdir@
+prefix = @prefix@
+program_transform_name = @program_transform_name@
+psdir = @psdir@
+sbindir = @sbindir@
+sharedstatedir = @sharedstatedir@
+srcdir = @srcdir@
+sysconfdir = @sysconfdir@
+target_alias = @target_alias@
+top_build_prefix = @top_build_prefix@
+top_builddir = @top_builddir@
+top_srcdir = @top_srcdir@
+INCLUDES = $(all_includes) -I$(top_srcdir)/include -I$(top_builddir)
+AM_CFLAGS = -Wall $(LIBOSMOCORE_CFLAGS) $(LIBOSMOVTY_CFLAGS) $(COVERAGE_CFLAGS)
+AM_LDFLAGS = $(LIBOSMOCORE_LIBS) $(COVERAGE_LDFLAGS)
+noinst_LIBRARIES = libabis.a
+libabis_a_SOURCES = e1_input.c e1_input_vty.c \
+			input/misdn.c		\
+			input/ipaccess.c	\
+			input/hsl.c		\
+			input/dahdi.c		\
+			input/lapd.c
+
+EXTRA_DIST = input/lapd.h
+all: all-am
+
+.SUFFIXES:
+.SUFFIXES: .c .o .obj
+$(srcdir)/Makefile.in:  $(srcdir)/Makefile.am  $(am__configure_deps)
+	@for dep in $?; do \
+	  case '$(am__configure_deps)' in \
+	    *$$dep*) \
+	      ( cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh ) \
+	        && { if test -f $@; then exit 0; else break; fi; }; \
+	      exit 1;; \
+	  esac; \
+	done; \
+	echo ' cd $(top_srcdir) && $(AUTOMAKE) --gnu src/libabis/Makefile'; \
+	$(am__cd) $(top_srcdir) && \
+	  $(AUTOMAKE) --gnu src/libabis/Makefile
+.PRECIOUS: Makefile
+Makefile: $(srcdir)/Makefile.in $(top_builddir)/config.status
+	@case '$?' in \
+	  *config.status*) \
+	    cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh;; \
+	  *) \
+	    echo ' cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__depfiles_maybe)'; \
+	    cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__depfiles_maybe);; \
+	esac;
+
+$(top_builddir)/config.status: $(top_srcdir)/configure $(CONFIG_STATUS_DEPENDENCIES)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+
+$(top_srcdir)/configure:  $(am__configure_deps)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+$(ACLOCAL_M4):  $(am__aclocal_m4_deps)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+$(am__aclocal_m4_deps):
+
+clean-noinstLIBRARIES:
+	-test -z "$(noinst_LIBRARIES)" || rm -f $(noinst_LIBRARIES)
+libabis.a: $(libabis_a_OBJECTS) $(libabis_a_DEPENDENCIES) 
+	$(AM_V_at)-rm -f libabis.a
+	$(AM_V_AR)$(libabis_a_AR) libabis.a $(libabis_a_OBJECTS) $(libabis_a_LIBADD)
+	$(AM_V_at)$(RANLIB) libabis.a
+
+mostlyclean-compile:
+	-rm -f *.$(OBJEXT)
+
+distclean-compile:
+	-rm -f *.tab.c
+
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/dahdi.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/e1_input.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/e1_input_vty.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/hsl.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/ipaccess.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/lapd.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/misdn.Po@am__quote@
+
+.c.o:
+@am__fastdepCC_TRUE@	$(AM_V_CC)$(COMPILE) -MT $@ -MD -MP -MF $(DEPDIR)/$*.Tpo -c -o $@ $<
+@am__fastdepCC_TRUE@	$(AM_V_at)$(am__mv) $(DEPDIR)/$*.Tpo $(DEPDIR)/$*.Po
+@am__fastdepCC_FALSE@	$(AM_V_CC) @AM_BACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	source='$<' object='$@' libtool=no @AMDEPBACKSLASH@
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+@am__fastdepCC_FALSE@	$(COMPILE) -c $<
+
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+@am__fastdepCC_TRUE@	$(AM_V_CC)$(COMPILE) -MT $@ -MD -MP -MF $(DEPDIR)/$*.Tpo -c -o $@ `$(CYGPATH_W) '$<'`
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+
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+lapd.obj: input/lapd.c
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+
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+	list='$(SOURCES) $(HEADERS) $(LISP) $(TAGS_FILES)'; \
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+	    if test -f "$$i"; then echo $$i; else echo $(srcdir)/$$i; fi; \
+	  done | \
+	  $(AWK) '{ files[$$0] = 1; nonempty = 1; } \
+	      END { if (nonempty) { for (i in files) print i; }; }'`; \
+	mkid -fID $$unique
+tags: TAGS
+
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+	here=`pwd`; \
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+	unique=`for i in $$list; do \
+	    if test -f "$$i"; then echo $$i; else echo $(srcdir)/$$i; fi; \
+	  done | \
+	  $(AWK) '{ files[$$0] = 1; nonempty = 1; } \
+	      END { if (nonempty) { for (i in files) print i; }; }'`; \
+	shift; \
+	if test -z "$(ETAGS_ARGS)$$*$$unique"; then :; else \
+	  test -n "$$unique" || unique=$$empty_fix; \
+	  if test $$# -gt 0; then \
+	    $(ETAGS) $(ETAGSFLAGS) $(AM_ETAGSFLAGS) $(ETAGS_ARGS) \
+	      "$$@" $$unique; \
+	  else \
+	    $(ETAGS) $(ETAGSFLAGS) $(AM_ETAGSFLAGS) $(ETAGS_ARGS) \
+	      $$unique; \
+	  fi; \
+	fi
+ctags: CTAGS
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+		$(TAGS_FILES) $(LISP)
+	list='$(SOURCES) $(HEADERS)  $(LISP) $(TAGS_FILES)'; \
+	unique=`for i in $$list; do \
+	    if test -f "$$i"; then echo $$i; else echo $(srcdir)/$$i; fi; \
+	  done | \
+	  $(AWK) '{ files[$$0] = 1; nonempty = 1; } \
+	      END { if (nonempty) { for (i in files) print i; }; }'`; \
+	test -z "$(CTAGS_ARGS)$$unique" \
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+	here=`$(am__cd) $(top_builddir) && pwd` \
+	  && $(am__cd) $(top_srcdir) \
+	  && gtags -i $(GTAGS_ARGS) "$$here"
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+distdir: $(DISTFILES)
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+	    cp -fpR $$d/$$file "$(distdir)$$dir" || exit 1; \
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+	  `test -z '$(STRIP)' || \
+	    echo "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'"` install
+mostlyclean-generic:
+
+clean-generic:
+
+distclean-generic:
+	-test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
+	-test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
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+
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/src/libabis/e1_input.c b/src/libabis/e1_input.c
new file mode 100644
index 000000000..3b6644eff
--- /dev/null
+++ b/src/libabis/e1_input.c
@@ -0,0 +1,649 @@
+/* OpenBSC Abis interface to E1 */
+
+/* (C) 2008-2009 by Harald Welte <laforge@gnumonks.org>
+ *
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <string.h>
+#include <time.h>
+#include <sys/fcntl.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+#include <arpa/inet.h>
+#include <mISDNif.h>
+
+//#define AF_COMPATIBILITY_FUNC
+//#include <compat_af_isdn.h>
+#ifndef AF_ISDN
+#define AF_ISDN 34
+#define PF_ISDN AF_ISDN
+#endif
+
+#include <osmocore/select.h>
+#include <osmocore/msgb.h>
+#include <openbsc/debug.h>
+#include <openbsc/gsm_data.h>
+#include <openbsc/e1_input.h>
+#include <openbsc/abis_nm.h>
+#include <openbsc/abis_rsl.h>
+#include <osmocore/linuxlist.h>
+#include <openbsc/subchan_demux.h>
+#include <openbsc/trau_frame.h>
+#include <openbsc/trau_mux.h>
+#include <osmocore/talloc.h>
+#include <openbsc/signal.h>
+#include <openbsc/misdn.h>
+
+#include "../../bscconfig.h"
+
+#define NUM_E1_TS	32
+
+/* list of all E1 drivers */
+LLIST_HEAD(e1inp_driver_list);
+
+/* list of all E1 lines */
+LLIST_HEAD(e1inp_line_list);
+
+static void *tall_sigl_ctx;
+
+/*
+ * pcap writing of the misdn load
+ * pcap format is from http://wiki.wireshark.org/Development/LibpcapFileFormat
+ */
+#define DLT_LINUX_LAPD		177
+#define PCAP_INPUT		0
+#define PCAP_OUTPUT		1
+
+struct pcap_hdr {
+	u_int32_t magic_number;
+	u_int16_t version_major;
+	u_int16_t version_minor;
+	int32_t  thiszone;
+	u_int32_t sigfigs;
+	u_int32_t snaplen;
+	u_int32_t network;
+} __attribute__((packed));
+
+struct pcaprec_hdr {
+	u_int32_t ts_sec;
+	u_int32_t ts_usec;
+	u_int32_t incl_len;
+	u_int32_t orig_len;
+} __attribute__((packed));
+
+struct fake_linux_lapd_header {
+        u_int16_t pkttype;
+	u_int16_t hatype;
+	u_int16_t halen;
+	u_int64_t addr;
+	int16_t protocol;
+} __attribute__((packed));
+
+struct lapd_header {
+	u_int8_t ea1 : 1;
+	u_int8_t cr : 1;
+	u_int8_t sapi : 6;
+	u_int8_t ea2 : 1;
+	u_int8_t tei : 7;
+	u_int8_t control_foo; /* fake UM's ... */
+} __attribute__((packed));
+
+static_assert(offsetof(struct fake_linux_lapd_header, hatype) == 2,    hatype_offset);
+static_assert(offsetof(struct fake_linux_lapd_header, halen) == 4,     halen_offset);
+static_assert(offsetof(struct fake_linux_lapd_header, addr) == 6,      addr_offset);
+static_assert(offsetof(struct fake_linux_lapd_header, protocol) == 14, proto_offset);
+static_assert(sizeof(struct fake_linux_lapd_header) == 16,	       lapd_header_size);
+
+
+static int pcap_fd = -1;
+
+void e1_set_pcap_fd(int fd)
+{
+	int ret;
+	struct pcap_hdr header = {
+		.magic_number	= 0xa1b2c3d4,
+		.version_major	= 2,
+		.version_minor	= 4,
+		.thiszone	= 0,
+		.sigfigs	= 0,
+		.snaplen	= 65535,
+		.network	= DLT_LINUX_LAPD,
+	};
+
+	pcap_fd = fd;
+	ret = write(pcap_fd, &header, sizeof(header));
+}
+
+/* This currently only works for the D-Channel */
+static void write_pcap_packet(int direction, int sapi, int tei,
+			      struct msgb *msg) {
+	if (pcap_fd < 0)
+		return;
+
+	int ret;
+	time_t cur_time;
+	struct tm *tm;
+
+	struct fake_linux_lapd_header header = {
+		.pkttype	= 4,
+		.hatype		= 0,
+		.halen		= 0,
+		.addr		= direction == PCAP_OUTPUT ? 0x0 : 0x1,
+		.protocol	= ntohs(48),
+	};
+
+	struct lapd_header lapd_header = {
+		.ea1		= 0,
+		.cr		= direction == PCAP_OUTPUT ? 1 : 0,
+		.sapi		= sapi & 0x3F,
+		.ea2		= 1,
+		.tei		= tei & 0x7F,
+		.control_foo	= 0x03 /* UI */,
+	};	
+
+	struct pcaprec_hdr payload_header = {
+		.ts_sec	    = 0,
+		.ts_usec    = 0,
+		.incl_len   = msgb_l2len(msg) + sizeof(struct fake_linux_lapd_header)
+				+ sizeof(struct lapd_header),
+		.orig_len   = msgb_l2len(msg) + sizeof(struct fake_linux_lapd_header)
+				+ sizeof(struct lapd_header),
+	};
+
+
+	cur_time = time(NULL);
+	tm = localtime(&cur_time);
+	payload_header.ts_sec = mktime(tm);
+
+	ret = write(pcap_fd, &payload_header, sizeof(payload_header));
+	ret = write(pcap_fd, &header, sizeof(header));
+	ret = write(pcap_fd, &lapd_header, sizeof(lapd_header));
+	ret = write(pcap_fd, msg->l2h, msgb_l2len(msg));
+}
+
+static const char *sign_types[] = {
+	[E1INP_SIGN_NONE]	= "None",
+	[E1INP_SIGN_OML]	= "OML",
+	[E1INP_SIGN_RSL]	= "RSL",
+};
+const char *e1inp_signtype_name(enum e1inp_sign_type tp)
+{
+	if (tp >= ARRAY_SIZE(sign_types))
+		return "undefined";
+	return sign_types[tp];
+}
+
+static const char *ts_types[] = {
+	[E1INP_TS_TYPE_NONE]	= "None",
+	[E1INP_TS_TYPE_SIGN]	= "Signalling",
+	[E1INP_TS_TYPE_TRAU]	= "TRAU",
+};
+
+const char *e1inp_tstype_name(enum e1inp_ts_type tp)
+{
+	if (tp >= ARRAY_SIZE(ts_types))
+		return "undefined";
+	return ts_types[tp];
+}
+
+/* callback when a TRAU frame was received */
+static int subch_cb(struct subch_demux *dmx, int ch, u_int8_t *data, int len,
+		    void *_priv)
+{
+	struct e1inp_ts *e1i_ts = _priv;
+	struct gsm_e1_subslot src_ss;
+
+	src_ss.e1_nr = e1i_ts->line->num;
+	src_ss.e1_ts = e1i_ts->num;
+	src_ss.e1_ts_ss = ch;
+
+	return trau_mux_input(&src_ss, data, len);
+}
+
+int abis_rsl_sendmsg(struct msgb *msg)
+{
+	struct e1inp_sign_link *sign_link;
+	struct e1inp_driver *e1inp_driver;
+	struct e1inp_ts *e1i_ts;
+
+	msg->l2h = msg->data;
+
+	if (!msg->trx) {
+		LOGP(DRSL, LOGL_ERROR, "rsl_sendmsg: msg->trx == NULL: %s\n",
+			hexdump(msg->data, msg->len));
+		talloc_free(msg);
+		return -EINVAL;
+	} else if (!msg->trx->rsl_link) {
+		LOGP(DRSL, LOGL_ERROR, "rsl_sendmsg: msg->trx->rsl_link == NULL: %s\n",
+			hexdump(msg->data, msg->len));
+		talloc_free(msg);
+		return -EIO;
+	}
+
+	sign_link = msg->trx->rsl_link;
+	e1i_ts = sign_link->ts;
+	if (!bsc_timer_pending(&e1i_ts->sign.tx_timer)) {
+		/* notify the driver we have something to write */
+		e1inp_driver = sign_link->ts->line->driver;
+		e1inp_driver->want_write(e1i_ts);
+	}
+	msgb_enqueue(&sign_link->tx_list, msg);
+
+	/* dump it */
+	write_pcap_packet(PCAP_OUTPUT, sign_link->sapi, sign_link->tei, msg);
+
+	return 0;
+}
+
+int _abis_nm_sendmsg(struct msgb *msg, int to_trx_oml)
+{
+	struct e1inp_sign_link *sign_link;
+	struct e1inp_driver *e1inp_driver;
+	struct e1inp_ts *e1i_ts;
+
+	msg->l2h = msg->data;
+
+	if (!msg->trx || !msg->trx->bts || !msg->trx->bts->oml_link) {
+		LOGP(DNM, LOGL_ERROR, "nm_sendmsg: msg->trx == NULL\n");
+		return -EINVAL;
+	}
+
+	/* Check for TRX-specific OML link first */
+	if (to_trx_oml) {
+		if (!msg->trx->oml_link)
+			return -ENODEV;
+		sign_link = msg->trx->oml_link;
+	} else
+		sign_link = msg->trx->bts->oml_link;
+
+	e1i_ts = sign_link->ts;
+	if (!bsc_timer_pending(&e1i_ts->sign.tx_timer)) {
+		/* notify the driver we have something to write */
+		e1inp_driver = sign_link->ts->line->driver;
+		e1inp_driver->want_write(e1i_ts);
+	}
+	msgb_enqueue(&sign_link->tx_list, msg);
+
+	/* dump it */
+	write_pcap_packet(PCAP_OUTPUT, sign_link->sapi, sign_link->tei, msg);
+
+	return 0;
+}
+
+/* Timeslot */
+
+/* configure and initialize one e1inp_ts */
+int e1inp_ts_config(struct e1inp_ts *ts, struct e1inp_line *line,
+		    enum e1inp_ts_type type)
+{
+	if (ts->type == type && ts->line && line)
+		return 0;
+
+	ts->type = type;
+	ts->line = line;
+
+	switch (type) {
+	case E1INP_TS_TYPE_SIGN:
+		if (line && line->driver)
+			ts->sign.delay = line->driver->default_delay;
+		else
+			ts->sign.delay = 100000;
+		INIT_LLIST_HEAD(&ts->sign.sign_links);
+		break;
+	case E1INP_TS_TYPE_TRAU:
+		subchan_mux_init(&ts->trau.mux);
+		ts->trau.demux.out_cb = subch_cb;
+		ts->trau.demux.data = ts;
+		subch_demux_init(&ts->trau.demux);
+		break;
+	default:
+		LOGP(DMI, LOGL_ERROR, "unsupported E1 timeslot type %u\n",
+			ts->type);
+		return -EINVAL;
+	}
+	return 0;
+}
+
+struct e1inp_line *e1inp_line_get(u_int8_t e1_nr)
+{
+	struct e1inp_line *e1i_line;
+
+	/* iterate over global list of e1 lines */
+	llist_for_each_entry(e1i_line, &e1inp_line_list, list) {
+		if (e1i_line->num == e1_nr)
+			return e1i_line;
+	}
+	return NULL;
+}
+
+struct e1inp_line *e1inp_line_create(u_int8_t e1_nr, const char *driver_name)
+{
+	struct e1inp_driver *driver;
+	struct e1inp_line *line;
+	int i;
+
+	line = e1inp_line_get(e1_nr);
+	if (line) {
+		LOGP(DINP, LOGL_ERROR, "E1 Line %u already exists\n",
+		     e1_nr);
+		return NULL;
+	}
+
+	driver = e1inp_driver_find(driver_name);
+	if (!driver) {
+		LOGP(DINP, LOGL_ERROR, "No such E1 driver '%s'\n",
+		     driver_name);
+		return NULL;
+	}
+
+	line = talloc_zero(tall_bsc_ctx, struct e1inp_line);
+	if (!line)
+		return NULL;
+
+	line->driver = driver;
+
+	line->num = e1_nr;
+	for (i = 0; i < NUM_E1_TS; i++) {
+		line->ts[i].num = i+1;
+		line->ts[i].line = line;
+	}
+	llist_add_tail(&line->list, &e1inp_line_list);
+
+	return line;
+}
+
+#if 0
+struct e1inp_line *e1inp_line_get_create(u_int8_t e1_nr)
+{
+	struct e1inp_line *line;
+	int i;
+
+	line = e1inp_line_get(e1_nr);
+	if (line)
+		return line;
+
+	line = talloc_zero(tall_bsc_ctx, struct e1inp_line);
+	if (!line)
+		return NULL;
+
+	line->num = e1_nr;
+	for (i = 0; i < NUM_E1_TS; i++) {
+		line->ts[i].num = i+1;
+		line->ts[i].line = line;
+	}
+	llist_add_tail(&line->list, &e1inp_line_list);
+
+	return line;
+}
+#endif
+
+static struct e1inp_ts *e1inp_ts_get(u_int8_t e1_nr, u_int8_t ts_nr)
+{
+	struct e1inp_line *e1i_line;
+
+	e1i_line = e1inp_line_get(e1_nr);
+	if (!e1i_line)
+		return NULL;
+
+	return &e1i_line->ts[ts_nr-1];
+}
+
+struct subch_mux *e1inp_get_mux(u_int8_t e1_nr, u_int8_t ts_nr)
+{
+	struct e1inp_ts *e1i_ts = e1inp_ts_get(e1_nr, ts_nr);
+
+	if (!e1i_ts)
+		return NULL;
+
+	return &e1i_ts->trau.mux;
+}
+
+/* Signalling Link */
+
+struct e1inp_sign_link *e1inp_lookup_sign_link(struct e1inp_ts *e1i,
+					 	u_int8_t tei, u_int8_t sapi)
+{
+	struct e1inp_sign_link *link;
+
+	llist_for_each_entry(link, &e1i->sign.sign_links, list) {
+		if (link->sapi == sapi && link->tei == tei)
+			return link;
+	}
+
+	return NULL;
+}
+
+/* create a new signalling link in a E1 timeslot */
+
+struct e1inp_sign_link *
+e1inp_sign_link_create(struct e1inp_ts *ts, enum e1inp_sign_type type,
+			struct gsm_bts_trx *trx, u_int8_t tei,
+			u_int8_t sapi)
+{
+	struct e1inp_sign_link *link;
+
+	if (ts->type != E1INP_TS_TYPE_SIGN)
+		return NULL;
+
+	link = talloc_zero(tall_sigl_ctx, struct e1inp_sign_link);
+	if (!link)
+		return NULL;
+
+	link->ts = ts;
+	link->type = type;
+	INIT_LLIST_HEAD(&link->tx_list);
+	link->trx = trx;
+	link->tei = tei;
+	link->sapi = sapi;
+
+	llist_add_tail(&link->list, &ts->sign.sign_links);
+
+	return link;
+}
+
+void e1inp_sign_link_destroy(struct e1inp_sign_link *link)
+{
+	struct msgb *msg;
+
+	llist_del(&link->list);
+	while (!llist_empty(&link->tx_list)) {
+		msg = msgb_dequeue(&link->tx_list);
+		msgb_free(msg);
+	}
+
+	if (link->ts->type == E1INP_TS_TYPE_SIGN)
+		bsc_del_timer(&link->ts->sign.tx_timer);
+
+	talloc_free(link);
+}
+
+/* the E1 driver tells us he has received something on a TS */
+int e1inp_rx_ts(struct e1inp_ts *ts, struct msgb *msg,
+		u_int8_t tei, u_int8_t sapi)
+{
+	struct e1inp_sign_link *link;
+	struct gsm_bts *bts;
+	int ret;
+
+	switch (ts->type) {
+	case E1INP_TS_TYPE_SIGN:
+		/* consult the list of signalling links */
+		write_pcap_packet(PCAP_INPUT, sapi, tei, msg);
+		link = e1inp_lookup_sign_link(ts, tei, sapi);
+		if (!link) {
+			LOGP(DMI, LOGL_ERROR, "didn't find signalling link for "
+				"tei %d, sapi %d\n", tei, sapi);
+			return -EINVAL;
+		}
+
+		log_set_context(BSC_CTX_BTS, link->trx->bts);
+		switch (link->type) {
+		case E1INP_SIGN_OML:
+			msg->trx = link->trx;
+			bts = msg->trx->bts;
+			ret = bts->model->oml_rcvmsg(msg);
+			break;
+		case E1INP_SIGN_RSL:
+			msg->trx = link->trx;
+			ret = abis_rsl_rcvmsg(msg);
+			break;
+		default:
+			ret = -EINVAL;
+			LOGP(DMI, LOGL_ERROR, "unknown link type %u\n", link->type);
+			break;
+		}
+		break;
+	case E1INP_TS_TYPE_TRAU:
+		ret = subch_demux_in(&ts->trau.demux, msg->l2h, msgb_l2len(msg));
+		break;
+	default:
+		ret = -EINVAL;
+		LOGP(DMI, LOGL_ERROR, "unknown TS type %u\n", ts->type);
+		break;
+	}
+
+	return ret;
+}
+
+#define TSX_ALLOC_SIZE 4096
+
+/* called by driver if it wants to transmit on a given TS */
+struct msgb *e1inp_tx_ts(struct e1inp_ts *e1i_ts,
+			 struct e1inp_sign_link **sign_link)
+{
+	struct e1inp_sign_link *link;
+	struct msgb *msg = NULL;
+	int len;
+
+	switch (e1i_ts->type) {
+	case E1INP_TS_TYPE_SIGN:
+		/* FIXME: implement this round robin */
+		llist_for_each_entry(link, &e1i_ts->sign.sign_links, list) {
+			msg = msgb_dequeue(&link->tx_list);
+			if (msg) {
+				if (sign_link)
+					*sign_link = link;
+				break;
+			}
+		}
+		break;
+	case E1INP_TS_TYPE_TRAU:
+		msg = msgb_alloc(TSX_ALLOC_SIZE, "TRAU_TX");
+		if (!msg)
+			return NULL;
+		len = subchan_mux_out(&e1i_ts->trau.mux, msg->data, 40);
+		msgb_put(msg, 40);
+		break;
+	default:
+		LOGP(DMI, LOGL_ERROR, "unsupported E1 TS type %u\n", e1i_ts->type);
+		return NULL;
+	}
+	return msg;
+}
+
+/* called by driver in case some kind of link state event */
+int e1inp_event(struct e1inp_ts *ts, int evt, u_int8_t tei, u_int8_t sapi)
+{
+	struct e1inp_sign_link *link;
+	struct input_signal_data isd;
+
+	link = e1inp_lookup_sign_link(ts, tei, sapi);
+	if (!link)
+		return -EINVAL;
+
+	isd.link_type = link->type;
+	isd.trx = link->trx;
+	isd.tei = tei;
+	isd.sapi = sapi;
+
+	/* report further upwards */
+	dispatch_signal(SS_INPUT, evt, &isd);
+	return 0;
+}
+
+/* register a driver with the E1 core */
+int e1inp_driver_register(struct e1inp_driver *drv)
+{
+	llist_add_tail(&drv->list, &e1inp_driver_list);
+	return 0;
+}
+
+struct e1inp_driver *e1inp_driver_find(const char *name)
+{
+	struct e1inp_driver *drv;
+
+	llist_for_each_entry(drv, &e1inp_driver_list, list) {
+		if (!strcasecmp(name, drv->name))
+			return drv;
+	}
+	return NULL;
+}
+
+int e1inp_line_update(struct e1inp_line *line)
+{
+	struct input_signal_data isd;
+	int rc;
+
+	if (line->driver && line->driver->line_update)
+		rc = line->driver->line_update(line);
+	else
+		rc = 0;
+
+	/* Send a signal to anyone who is interested in new lines being
+	 * configured */
+	memset(&isd, 0, sizeof(isd));
+	isd.line = line;
+	dispatch_signal(SS_INPUT, S_INP_LINE_INIT, &isd);
+
+	return rc;
+}
+
+static int e1i_sig_cb(unsigned int subsys, unsigned int signal,
+		      void *handler_data, void *signal_data)
+{
+	if (subsys != SS_GLOBAL ||
+	    signal != S_GLOBAL_SHUTDOWN)
+		return 0;
+
+	if (pcap_fd) {
+		close(pcap_fd);
+		pcap_fd = -1;
+	}
+
+	return 0;
+}
+
+void e1inp_misdn_init(void);
+void e1inp_dahdi_init(void);
+
+void e1inp_init(void)
+{
+	tall_sigl_ctx = talloc_named_const(tall_bsc_ctx, 1,
+					   "e1inp_sign_link");
+	register_signal_handler(SS_GLOBAL, e1i_sig_cb, NULL);
+
+	e1inp_misdn_init();
+#ifdef HAVE_DAHDI_USER_H
+	e1inp_dahdi_init();
+#endif
+}
diff --git a/src/libabis/e1_input_vty.c b/src/libabis/e1_input_vty.c
new file mode 100644
index 000000000..66bf6555e
--- /dev/null
+++ b/src/libabis/e1_input_vty.c
@@ -0,0 +1,102 @@
+/* OpenBSC E1 vty interface */
+/* (C) 2011 by Harald Welte <laforge@gnumonks.org>
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/types.h>
+
+#include <osmocom/vty/command.h>
+#include <osmocom/vty/buffer.h>
+#include <osmocom/vty/vty.h>
+#include <osmocom/vty/logging.h>
+#include <osmocom/vty/telnet_interface.h>
+
+#include <osmocore/linuxlist.h>
+#include <openbsc/gsm_data.h>
+#include <openbsc/e1_input.h>
+#include <osmocore/utils.h>
+#include <osmocore/gsm_utils.h>
+#include <osmocore/talloc.h>
+#include <openbsc/vty.h>
+#include <openbsc/debug.h>
+
+#include "../../bscconfig.h"
+
+#define E1_DRIVER_NAMES		"(misdn|dahdi)"
+#define E1_DRIVER_HELP		"mISDN supported E1 Card\n" \
+				"DAHDI supported E1/T1/J1 Card\n"
+
+DEFUN(cfg_e1line_driver, cfg_e1_line_driver_cmd,
+	"e1_line <0-255> driver " E1_DRIVER_NAMES,
+	"Configure E1/T1/J1 Line\n" "Line Number\n" "Set driver for this line\n"
+	E1_DRIVER_HELP)
+{
+	struct e1inp_line *line;
+	int e1_nr = atoi(argv[0]);
+
+	line = e1inp_line_get(e1_nr);
+	if (line) {
+		vty_out(vty, "%% Line %d already exists%s", e1_nr, VTY_NEWLINE);
+		return CMD_WARNING;
+	}
+	line = e1inp_line_create(e1_nr, argv[1]);
+	if (!line) {
+		vty_out(vty, "%% Error creating line %d%s", e1_nr, VTY_NEWLINE);
+		return CMD_WARNING;
+	}
+
+	return CMD_SUCCESS;
+}
+
+DEFUN(cfg_e1inp, cfg_e1inp_cmd,
+	"e1_input",
+	"Configure E1/T1/J1 TDM input\n")
+{
+	vty->node = E1INP_NODE;
+
+	return CMD_SUCCESS;
+}
+
+static int e1inp_config_write(struct vty *vty)
+{
+	struct e1inp_line *line;
+
+	vty_out(vty, "e1_input%s", VTY_NEWLINE);
+
+	llist_for_each_entry(line, &e1inp_line_list, list) {
+		vty_out(vty, " e1_line %u driver %s%s", line->num,
+			line->driver->name, VTY_NEWLINE);
+	}
+	return CMD_SUCCESS;
+}
+
+struct cmd_node e1inp_node = {
+	E1INP_NODE,
+	"%s(e1_input)#",
+	1,
+};
+
+int e1inp_vty_init(void)
+{
+	install_element(CONFIG_NODE, &cfg_e1inp_cmd);
+	install_node(&e1inp_node, e1inp_config_write);
+	install_element(E1INP_NODE, &cfg_e1_line_driver_cmd);
+
+	return 0;
+}
diff --git a/src/libabis/input/dahdi.c b/src/libabis/input/dahdi.c
new file mode 100644
index 000000000..572bb5ae9
--- /dev/null
+++ b/src/libabis/input/dahdi.c
@@ -0,0 +1,494 @@
+/* OpenBSC Abis input driver for DAHDI */
+
+/* (C) 2008-2011 by Harald Welte <laforge@gnumonks.org>
+ * (C) 2009 by Holger Hans Peter Freyther <zecke@selfish.org>
+ * (C) 2010 by Digium and Matthew Fredrickson <creslin@digium.com>
+ *
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ */
+
+#include "../../../bscconfig.h"
+
+#ifdef HAVE_DAHDI_USER_H
+
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <string.h>
+#include <time.h>
+#include <sys/fcntl.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+#include <arpa/inet.h>
+#include <dahdi/user.h>
+
+#include <osmocore/select.h>
+#include <osmocore/msgb.h>
+#include <openbsc/debug.h>
+#include <openbsc/gsm_data.h>
+#include <openbsc/abis_nm.h>
+#include <openbsc/abis_rsl.h>
+#include <openbsc/subchan_demux.h>
+#include <openbsc/e1_input.h>
+#include <openbsc/signal.h>
+#include <osmocore/talloc.h>
+
+#include "lapd.h"
+
+#define TS1_ALLOC_SIZE	300
+
+/* Corresponds to dahdi/user.h, only PRI related events */
+static const struct value_string dahdi_evt_names[] = {
+	{ DAHDI_EVENT_NONE,		"NONE" },
+	{ DAHDI_EVENT_ALARM,		"ALARM" },
+	{ DAHDI_EVENT_NOALARM,		"NOALARM" },
+	{ DAHDI_EVENT_ABORT,		"HDLC ABORT" },
+	{ DAHDI_EVENT_OVERRUN,		"HDLC OVERRUN" },
+	{ DAHDI_EVENT_BADFCS,		"HDLC BAD FCS" },
+	{ DAHDI_EVENT_REMOVED,		"REMOVED" },
+	{ 0, NULL }
+};
+
+static void handle_dahdi_exception(struct e1inp_ts *ts)
+{
+	int rc, evt;
+	struct input_signal_data isd;
+
+	rc = ioctl(ts->driver.dahdi.fd.fd, DAHDI_GETEVENT, &evt);
+	if (rc < 0)
+		return;
+
+	LOGP(DMI, LOGL_NOTICE, "Line %u(%s) / TS %u DAHDI EVENT %s\n",
+		ts->line->num, ts->line->name, ts->num,
+		get_value_string(dahdi_evt_names, evt));
+
+	isd.line = ts->line;
+
+	switch (evt) {
+	case DAHDI_EVENT_ALARM:
+		/* we should notify the code that the line is gone */
+		dispatch_signal(SS_INPUT, S_INP_LINE_ALARM, &isd);
+		break;
+	case DAHDI_EVENT_NOALARM:
+		/* alarm has gone, we should re-start the SABM requests */
+		dispatch_signal(SS_INPUT, S_INP_LINE_NOALARM, &isd);
+		break;
+	}
+}
+
+static int handle_ts1_read(struct bsc_fd *bfd)
+{
+	struct e1inp_line *line = bfd->data;
+	unsigned int ts_nr = bfd->priv_nr;
+	struct e1inp_ts *e1i_ts = &line->ts[ts_nr-1];
+	struct msgb *msg = msgb_alloc(TS1_ALLOC_SIZE, "DAHDI TS1");
+	lapd_mph_type prim;
+	unsigned int sapi, tei;
+	int ilen, ret;
+	uint8_t *idata;
+
+	if (!msg)
+		return -ENOMEM;
+
+	ret = read(bfd->fd, msg->data, TS1_ALLOC_SIZE - 16);
+	if (ret == -1)
+		handle_dahdi_exception(e1i_ts);
+	else if (ret < 0) {
+		perror("read ");
+	}
+	msgb_put(msg, ret - 2);
+	if (ret <= 3) {
+		perror("read ");
+	}
+
+	sapi = msg->data[0] >> 2;
+	tei = msg->data[1] >> 1;
+
+	DEBUGP(DMI, "<= len = %d, sapi(%d) tei(%d)", ret, sapi, tei);
+
+	idata = lapd_receive(e1i_ts->driver.dahdi.lapd, msg->data, msg->len, &ilen, &prim);
+	if (!idata && prim == 0)
+		return -EIO;
+
+	msgb_pull(msg, 2);
+
+	DEBUGP(DMI, "prim %08x\n", prim);
+
+	switch (prim) {
+	case 0:
+		break;
+	case LAPD_MPH_ACTIVATE_IND:
+		DEBUGP(DMI, "MPH_ACTIVATE_IND: sapi(%d) tei(%d)\n", sapi, tei);
+		ret = e1inp_event(e1i_ts, S_INP_TEI_UP, tei, sapi);
+		break;
+	case LAPD_MPH_DEACTIVATE_IND:
+		DEBUGP(DMI, "MPH_DEACTIVATE_IND: sapi(%d) tei(%d)\n", sapi, tei);
+		ret = e1inp_event(e1i_ts, S_INP_TEI_DN, tei, sapi);
+		break;
+	case LAPD_DL_DATA_IND:
+	case LAPD_DL_UNITDATA_IND:
+		if (prim == LAPD_DL_DATA_IND)
+			msg->l2h = msg->data + 2;
+		else
+			msg->l2h = msg->data + 1;
+		DEBUGP(DMI, "RX: %s\n", hexdump(msgb_l2(msg), ret));
+		ret = e1inp_rx_ts(e1i_ts, msg, tei, sapi);
+		break;
+	default:
+		printf("ERROR: unknown prim\n");
+		break;
+	}
+
+	DEBUGP(DMI, "Returned ok\n");
+	return ret;
+}
+
+static int ts_want_write(struct e1inp_ts *e1i_ts)
+{
+	/* We never include the DAHDI B-Channel FD into the
+	 * writeset, since it doesn't support poll() based
+	 * write flow control */
+	if (e1i_ts->type == E1INP_TS_TYPE_TRAU) {
+		fprintf(stderr, "Trying to write TRAU ts\n");
+		return 0;
+	}
+
+	e1i_ts->driver.dahdi.fd.when |= BSC_FD_WRITE;
+
+	return 0;
+}
+
+static void timeout_ts1_write(void *data)
+{
+	struct e1inp_ts *e1i_ts = (struct e1inp_ts *)data;
+
+	/* trigger write of ts1, due to tx delay timer */
+	ts_want_write(e1i_ts);
+}
+
+static void dahdi_write_msg(uint8_t *data, int len, void *cbdata)
+{
+	struct bsc_fd *bfd = cbdata;
+	struct e1inp_line *line = bfd->data;
+	unsigned int ts_nr = bfd->priv_nr;
+	struct e1inp_ts *e1i_ts = &line->ts[ts_nr-1];
+	int ret;
+
+	ret = write(bfd->fd, data, len + 2);
+	if (ret == -1)
+		handle_dahdi_exception(e1i_ts);
+	else if (ret < 0)
+		LOGP(DMI, LOGL_NOTICE, "%s write failed %d\n", __func__, ret);
+}
+
+static int handle_ts1_write(struct bsc_fd *bfd)
+{
+	struct e1inp_line *line = bfd->data;
+	unsigned int ts_nr = bfd->priv_nr;
+	struct e1inp_ts *e1i_ts = &line->ts[ts_nr-1];
+	struct e1inp_sign_link *sign_link;
+	struct msgb *msg;
+
+	bfd->when &= ~BSC_FD_WRITE;
+
+	/* get the next msg for this timeslot */
+	msg = e1inp_tx_ts(e1i_ts, &sign_link);
+	if (!msg) {
+		/* no message after tx delay timer */
+		return 0;
+	}
+
+	DEBUGP(DMI, "TX: %s\n", hexdump(msg->data, msg->len));
+	lapd_transmit(e1i_ts->driver.dahdi.lapd, sign_link->tei,
+		      sign_link->sapi, msg->data, msg->len);
+	msgb_free(msg);
+
+	/* set tx delay timer for next event */
+	e1i_ts->sign.tx_timer.cb = timeout_ts1_write;
+	e1i_ts->sign.tx_timer.data = e1i_ts;
+	bsc_schedule_timer(&e1i_ts->sign.tx_timer, 0, 50000);
+
+	return 0;
+}
+
+
+static int invertbits = 1;
+
+static u_int8_t flip_table[256];
+
+static void init_flip_bits(void)
+{
+        int i,k;
+
+        for (i = 0 ; i < 256 ; i++) {
+                u_int8_t sample = 0 ;
+                for (k = 0; k<8; k++) {
+                        if ( i & 1 << k ) sample |= 0x80 >>  k;
+                }
+                flip_table[i] = sample;
+        }
+}
+
+static u_int8_t * flip_buf_bits ( u_int8_t * buf , int len)
+{
+        int i;
+        u_int8_t * start = buf;
+
+        for (i = 0 ; i < len; i++) {
+                buf[i] = flip_table[(u_int8_t)buf[i]];
+        }
+
+        return start;
+}
+
+#define D_BCHAN_TX_GRAN 160
+/* write to a B channel TS */
+static int handle_tsX_write(struct bsc_fd *bfd)
+{
+	struct e1inp_line *line = bfd->data;
+	unsigned int ts_nr = bfd->priv_nr;
+	struct e1inp_ts *e1i_ts = &line->ts[ts_nr-1];
+	u_int8_t tx_buf[D_BCHAN_TX_GRAN];
+	struct subch_mux *mx = &e1i_ts->trau.mux;
+	int ret;
+
+	ret = subchan_mux_out(mx, tx_buf, D_BCHAN_TX_GRAN);
+
+	if (ret != D_BCHAN_TX_GRAN) {
+		fprintf(stderr, "Huh, got ret of %d\n", ret);
+		if (ret < 0)
+			return ret;
+	}
+
+	DEBUGP(DMIB, "BCHAN TX: %s\n",
+		hexdump(tx_buf, D_BCHAN_TX_GRAN));
+
+	if (invertbits) {
+		flip_buf_bits(tx_buf, ret);
+	}
+
+	ret = write(bfd->fd, tx_buf, ret);
+	if (ret < D_BCHAN_TX_GRAN)
+		fprintf(stderr, "send returns %d instead of %d\n", ret,
+			D_BCHAN_TX_GRAN);
+
+	return ret;
+}
+
+#define D_TSX_ALLOC_SIZE (D_BCHAN_TX_GRAN)
+/* FIXME: read from a B channel TS */
+static int handle_tsX_read(struct bsc_fd *bfd)
+{
+	struct e1inp_line *line = bfd->data;
+	unsigned int ts_nr = bfd->priv_nr;
+	struct e1inp_ts *e1i_ts = &line->ts[ts_nr-1];
+	struct msgb *msg = msgb_alloc(D_TSX_ALLOC_SIZE, "DAHDI TSx");
+	int ret;
+
+	if (!msg)
+		return -ENOMEM;
+
+	ret = read(bfd->fd, msg->data, D_TSX_ALLOC_SIZE);
+	if (ret < 0 || ret != D_TSX_ALLOC_SIZE) {
+		fprintf(stderr, "read error  %d %s\n", ret, strerror(errno));
+		return ret;
+	}
+
+	if (invertbits) {
+		flip_buf_bits(msg->data, ret);
+	}
+
+	msgb_put(msg, ret);
+
+	msg->l2h = msg->data;
+	DEBUGP(DMIB, "BCHAN RX: %s\n",
+		hexdump(msgb_l2(msg), ret));
+	ret = e1inp_rx_ts(e1i_ts, msg, 0, 0);
+	/* physical layer indicates that data has been sent,
+	 * we thus can send some more data */
+	ret = handle_tsX_write(bfd);
+	msgb_free(msg);
+
+	return ret;
+}
+
+/* callback from select.c in case one of the fd's can be read/written */
+static int dahdi_fd_cb(struct bsc_fd *bfd, unsigned int what)
+{
+	struct e1inp_line *line = bfd->data;
+	unsigned int ts_nr = bfd->priv_nr;
+	unsigned int idx = ts_nr-1;
+	struct e1inp_ts *e1i_ts = &line->ts[idx];
+	int rc = 0;
+
+	switch (e1i_ts->type) {
+	case E1INP_TS_TYPE_SIGN:
+		if (what & BSC_FD_EXCEPT)
+			handle_dahdi_exception(e1i_ts);
+		if (what & BSC_FD_READ)
+			rc = handle_ts1_read(bfd);
+		if (what & BSC_FD_WRITE)
+			rc = handle_ts1_write(bfd);
+		break;
+	case E1INP_TS_TYPE_TRAU:
+		if (what & BSC_FD_EXCEPT)
+			handle_dahdi_exception(e1i_ts);
+		if (what & BSC_FD_READ)
+			rc = handle_tsX_read(bfd);
+		if (what & BSC_FD_WRITE)
+			rc = handle_tsX_write(bfd);
+		/* We never include the DAHDI B-Channel FD into the
+		 * writeset, since it doesn't support poll() based
+		 * write flow control */
+		break;
+	default:
+		fprintf(stderr, "unknown E1 TS type %u\n", e1i_ts->type);
+		break;
+	}
+
+	return rc;
+}
+
+static int dahdi_e1_line_update(struct e1inp_line *line);
+
+struct e1inp_driver dahdi_driver = {
+	.name = "dahdi",
+	.want_write = ts_want_write,
+	.line_update = &dahdi_e1_line_update,
+};
+
+void dahdi_set_bufinfo(int fd, int as_sigchan)
+{
+	struct dahdi_bufferinfo bi;
+	int x = 0;
+
+	if (ioctl(fd, DAHDI_GET_BUFINFO, &bi)) {
+		fprintf(stderr, "Error getting bufinfo\n");
+		exit(-1);
+	}
+
+	if (as_sigchan) {
+		bi.numbufs = 4;
+		bi.bufsize = 512;
+	} else {
+		bi.numbufs = 8;
+		bi.bufsize = D_BCHAN_TX_GRAN;
+		bi.txbufpolicy = DAHDI_POLICY_WHEN_FULL;
+	}
+
+	if (ioctl(fd, DAHDI_SET_BUFINFO, &bi)) {
+		fprintf(stderr, "Error setting bufinfo\n");
+		exit(-1);
+	}
+
+	if (!as_sigchan) {
+		if (ioctl(fd, DAHDI_AUDIOMODE, &x)) {
+			fprintf(stderr, "Error setting bufinfo\n");
+			exit(-1);
+		}
+	} else {
+		int one = 1;
+		ioctl(fd, DAHDI_HDLCFCSMODE, &one);
+		/* we cannot reliably check for the ioctl return value here
+		 * as this command will fail if the slot _already_ was a
+		 * signalling slot before :( */
+	}
+}
+
+static int dahdi_e1_setup(struct e1inp_line *line)
+{
+	int ts, ret;
+
+	/* TS0 is CRC4, don't need any fd for it */
+	for (ts = 1; ts < NUM_E1_TS; ts++) {
+		unsigned int idx = ts-1;
+		char openstr[128];
+		struct e1inp_ts *e1i_ts = &line->ts[idx];
+		struct bsc_fd *bfd = &e1i_ts->driver.dahdi.fd;
+
+		bfd->data = line;
+		bfd->priv_nr = ts;
+		bfd->cb = dahdi_fd_cb;
+		snprintf(openstr, sizeof(openstr), "/dev/dahdi/%d", ts);
+
+		switch (e1i_ts->type) {
+		case E1INP_TS_TYPE_NONE:
+			continue;
+			break;
+		case E1INP_TS_TYPE_SIGN:
+			bfd->fd = open(openstr, O_RDWR | O_NONBLOCK);
+			if (bfd->fd == -1) {
+				fprintf(stderr, "%s could not open %s %s\n",
+					__func__, openstr, strerror(errno));
+				exit(-1);
+			}
+			bfd->when = BSC_FD_READ | BSC_FD_EXCEPT;
+			dahdi_set_bufinfo(bfd->fd, 1);
+			e1i_ts->driver.dahdi.lapd = lapd_instance_alloc(1, dahdi_write_msg, bfd);
+			break;
+		case E1INP_TS_TYPE_TRAU:
+			bfd->fd = open(openstr, O_RDWR | O_NONBLOCK);
+			if (bfd->fd == -1) {
+				fprintf(stderr, "%s could not open %s %s\n",
+					__func__, openstr, strerror(errno));
+				exit(-1);
+			}
+			dahdi_set_bufinfo(bfd->fd, 0);
+			/* We never include the DAHDI B-Channel FD into the
+			 * writeset, since it doesn't support poll() based
+			 * write flow control */
+			bfd->when = BSC_FD_READ | BSC_FD_EXCEPT;// | BSC_FD_WRITE;
+			break;
+		}
+
+		if (bfd->fd < 0) {
+			fprintf(stderr, "%s could not open %s %s\n",
+				__func__, openstr, strerror(errno));
+			return bfd->fd;
+		}
+
+		ret = bsc_register_fd(bfd);
+		if (ret < 0) {
+			fprintf(stderr, "could not register FD: %s\n",
+				strerror(ret));
+			return ret;
+		}
+	}
+
+	return 0;
+}
+
+static int dahdi_e1_line_update(struct e1inp_line *line)
+{
+	if (line->driver != &dahdi_driver)
+		return -EINVAL;
+
+	return dahdi_e1_setup(line);
+}
+
+int e1inp_dahdi_init(void)
+{
+	init_flip_bits();
+
+	/* register the driver with the core */
+	return e1inp_driver_register(&dahdi_driver);
+}
+
+#endif /* HAVE_DAHDI_USER_H */
diff --git a/src/libabis/input/hsl.c b/src/libabis/input/hsl.c
new file mode 100644
index 000000000..1afe82b49
--- /dev/null
+++ b/src/libabis/input/hsl.c
@@ -0,0 +1,460 @@
+/* OpenBSC Abis input driver for HSL Femto */
+
+/* (C) 2011 by Harald Welte <laforge@gnumonks.org>
+ * (C) 2011 by On-Waves
+ *
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+/* HSL uses a much more primitive/simplified version of the IPA multiplex.
+ *
+ * They have taken out the nice parts like the ID_GET / ID_RESP for resolving
+ * the UNIT ID, as well as the keepalive ping/pong messages.  Furthermore, the
+ * Stream Identifiers are fixed on the BTS side (RSL always 0, OML always 0xff)
+ * and both OML+RSL share a single TCP connection.
+ *
+ * Other oddities include the encapsulation of BSSGP messages in the L3_INFO IE
+ * of RSL
+ */
+
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <string.h>
+#include <time.h>
+#include <sys/fcntl.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+#include <arpa/inet.h>
+
+#include <osmocore/select.h>
+#include <osmocore/tlv.h>
+#include <osmocore/msgb.h>
+#include <openbsc/debug.h>
+#include <openbsc/gsm_data.h>
+#include <openbsc/abis_nm.h>
+#include <openbsc/abis_rsl.h>
+#include <openbsc/subchan_demux.h>
+#include <openbsc/e1_input.h>
+#include <openbsc/ipaccess.h>
+#include <openbsc/socket.h>
+#include <openbsc/signal.h>
+#include <osmocore/talloc.h>
+
+#define HSL_TCP_PORT	2500
+#define HSL_PROTO_DEBUG	0xdd
+
+#define PRIV_OML 1
+#define PRIV_RSL 2
+
+/* data structure for one E1 interface with A-bis */
+struct hsl_e1_handle {
+	struct bsc_fd listen_fd;
+	struct gsm_network *gsmnet;
+};
+
+static struct hsl_e1_handle *e1h;
+
+
+#define TS1_ALLOC_SIZE	900
+
+#define OML_UP		0x0001
+#define RSL_UP		0x0002
+
+int hsl_drop_oml(struct gsm_bts *bts)
+{
+	struct gsm_bts_trx *trx;
+	struct e1inp_ts *ts;
+	struct e1inp_line *line;
+	struct bsc_fd *bfd;
+
+	if (!bts || !bts->oml_link)
+		return -1;
+
+	/* send OML down */
+	ts = bts->oml_link->ts;
+	line = ts->line;
+	e1inp_event(ts, S_INP_TEI_DN, bts->oml_link->tei, bts->oml_link->sapi);
+
+	bfd = &ts->driver.ipaccess.fd;
+	bsc_unregister_fd(bfd);
+	close(bfd->fd);
+	bfd->fd = -1;
+
+	/* clean up OML and RSL */
+	e1inp_sign_link_destroy(bts->oml_link);
+	bts->oml_link = NULL;
+	e1inp_sign_link_destroy(bts->c0->rsl_link);
+	bts->c0->rsl_link = NULL;
+	bts->ip_access.flags = 0;
+
+	/* kill the E1 line now... as we have no one left to use it */
+	talloc_free(line);
+
+	return -1;
+}
+
+static int hsl_drop_ts_fd(struct e1inp_ts *ts, struct bsc_fd *bfd)
+{
+	struct e1inp_sign_link *link, *link2;
+	int bts_nr = -1;
+
+	llist_for_each_entry_safe(link, link2, &ts->sign.sign_links, list) {
+		bts_nr = link->trx->bts->bts_nr;
+		e1inp_sign_link_destroy(link);
+	}
+
+	bsc_unregister_fd(bfd);
+	close(bfd->fd);
+	bfd->fd = -1;
+
+	talloc_free(ts->line);
+
+	return bts_nr;
+}
+
+struct gsm_bts *find_bts_by_serno(struct gsm_network *net, unsigned long serno)
+{
+	struct gsm_bts *bts;
+
+	llist_for_each_entry(bts, &net->bts_list, list) {
+		if (bts->type != GSM_BTS_TYPE_HSL_FEMTO)
+			continue;
+
+		if (serno == bts->hsl.serno)
+			return bts;
+	}
+
+	return NULL;
+}
+
+
+static int process_hsl_rsl(struct msgb *msg, struct e1inp_line *line)
+{
+	char serno_buf[16];
+	uint8_t serno_len;
+	unsigned long serno;
+	struct gsm_bts *bts;
+
+	switch (msg->l2h[1]) {
+	case 0x80:
+		/*, contains Serial Number + SW version */
+		if (msg->l2h[2] != 0xc0)
+			break;
+		serno_len = msg->l2h[3];
+		if (serno_len > sizeof(serno_buf)-1)
+			serno_len = sizeof(serno_buf)-1;
+		memcpy(serno_buf, msg->l2h+4, serno_len);
+		serno_buf[serno_len] = '\0';
+		serno = strtoul(serno_buf, NULL, 10);
+		bts = find_bts_by_serno(e1h->gsmnet, serno);
+		if (!bts) {
+			LOGP(DINP, LOGL_ERROR, "Unable to find BTS config for "
+				"serial number %lu(%s)\n", serno, serno_buf);
+			return -EIO;
+		}
+
+		DEBUGP(DINP, "Identified HSL BTS Serial Number %lu\n", serno);
+
+		/* we shouldn't hardcode it, but HSL femto also hardcodes it... */
+		bts->oml_tei = 255;
+		bts->c0->rsl_tei = 0;
+		bts->oml_link = e1inp_sign_link_create(&line->ts[PRIV_OML - 1],
+							E1INP_SIGN_OML, bts->c0,
+							bts->oml_tei, 0);
+		bts->c0->rsl_link = e1inp_sign_link_create(&line->ts[PRIV_OML - 1],
+							E1INP_SIGN_RSL, bts->c0,
+							bts->c0->rsl_tei, 0);
+		e1inp_event(&line->ts[PRIV_OML-1], S_INP_TEI_UP, 255, 0);
+		e1inp_event(&line->ts[PRIV_OML-1], S_INP_TEI_UP, 0, 0);
+		bts->ip_access.flags |= OML_UP;
+		bts->ip_access.flags |= (RSL_UP << 0);
+		msgb_free(msg);
+		return 1;	/* == we have taken over the msg */
+	case 0x82:
+		/* FIXME: do something with BSSGP, i.e. forward it over
+		 * NSIP to OsmoSGSN */
+		msgb_free(msg);
+		return 1;
+	}
+	return 0;
+}
+
+static int handle_ts1_read(struct bsc_fd *bfd)
+{
+	struct e1inp_line *line = bfd->data;
+	unsigned int ts_nr = bfd->priv_nr;
+	struct e1inp_ts *e1i_ts = &line->ts[ts_nr-1];
+	struct e1inp_sign_link *link;
+	struct msgb *msg;
+	struct ipaccess_head *hh;
+	int ret = 0, error;
+
+	msg = ipaccess_read_msg(bfd, &error);
+	if (!msg) {
+		if (error == 0) {
+			int ret = hsl_drop_ts_fd(e1i_ts, bfd);
+			if (ret >= 0)
+				LOGP(DINP, LOGL_NOTICE, "BTS %u disappeared, dead socket\n",
+					ret);
+			else
+				LOGP(DINP, LOGL_NOTICE, "unknown BTS disappeared, dead socket\n");
+		}
+		return error;
+	}
+
+	DEBUGP(DMI, "RX %u: %s\n", ts_nr, hexdump(msgb_l2(msg), msgb_l2len(msg)));
+
+	hh = (struct ipaccess_head *) msg->data;
+	if (hh->proto == HSL_PROTO_DEBUG) {
+		LOGP(DINP, LOGL_NOTICE, "HSL debug: %s\n", msg->data + sizeof(*hh));
+		msgb_free(msg);
+		return ret;
+	}
+
+	/* HSL proprietary RSL extension */
+	if (hh->proto == 0 && (msg->l2h[0] == 0x81 || msg->l2h[0] == 0x80)) {
+		ret = process_hsl_rsl(msg, line);
+		if (ret < 0) {
+			/* FIXME: close connection */
+			hsl_drop_ts_fd(e1i_ts, bfd);
+			return ret;
+		} else if (ret == 1)
+			return 0;
+		/* else: continue... */
+	}
+#ifdef HSL_SR_1_0
+	/* HSL for whatever reason chose to use 0x81 instead of 0x80 for FOM */
+	if (hh->proto == 255 && msg->l2h[0] == (ABIS_OM_MDISC_FOM | 0x01))
+		msg->l2h[0] = ABIS_OM_MDISC_FOM;
+#endif
+	link = e1inp_lookup_sign_link(e1i_ts, hh->proto, 0);
+	if (!link) {
+		LOGP(DINP, LOGL_ERROR, "no matching signalling link for "
+			"hh->proto=0x%02x\n", hh->proto);
+		msgb_free(msg);
+		return -EIO;
+	}
+	msg->trx = link->trx;
+
+	switch (link->type) {
+	case E1INP_SIGN_RSL:
+		if (!(msg->trx->bts->ip_access.flags & (RSL_UP << msg->trx->nr))) {
+			e1inp_event(e1i_ts, S_INP_TEI_UP, link->tei, link->sapi);
+			msg->trx->bts->ip_access.flags |= (RSL_UP << msg->trx->nr);
+		}
+		ret = abis_rsl_rcvmsg(msg);
+		break;
+	case E1INP_SIGN_OML:
+		if (!(msg->trx->bts->ip_access.flags & OML_UP)) {
+			e1inp_event(e1i_ts, S_INP_TEI_UP, link->tei, link->sapi);
+			msg->trx->bts->ip_access.flags |= OML_UP;
+		}
+		ret = abis_nm_rcvmsg(msg);
+		break;
+	default:
+		LOGP(DINP, LOGL_NOTICE, "Unknown HSL protocol class 0x%02x\n", hh->proto);
+		msgb_free(msg);
+		break;
+	}
+	return ret;
+}
+
+static int ts_want_write(struct e1inp_ts *e1i_ts)
+{
+	e1i_ts->driver.ipaccess.fd.when |= BSC_FD_WRITE;
+
+	return 0;
+}
+
+static void timeout_ts1_write(void *data)
+{
+	struct e1inp_ts *e1i_ts = (struct e1inp_ts *)data;
+
+	/* trigger write of ts1, due to tx delay timer */
+	ts_want_write(e1i_ts);
+}
+
+static int handle_ts1_write(struct bsc_fd *bfd)
+{
+	struct e1inp_line *line = bfd->data;
+	unsigned int ts_nr = bfd->priv_nr;
+	struct e1inp_ts *e1i_ts = &line->ts[ts_nr-1];
+	struct e1inp_sign_link *sign_link;
+	struct msgb *msg;
+	u_int8_t proto;
+	int ret;
+
+	bfd->when &= ~BSC_FD_WRITE;
+
+	/* get the next msg for this timeslot */
+	msg = e1inp_tx_ts(e1i_ts, &sign_link);
+	if (!msg) {
+		/* no message after tx delay timer */
+		return 0;
+	}
+
+	switch (sign_link->type) {
+	case E1INP_SIGN_OML:
+		proto = IPAC_PROTO_OML;
+#ifdef HSL_SR_1_0
+		/* HSL uses 0x81 for FOM for some reason */
+		if (msg->data[0] == ABIS_OM_MDISC_FOM)
+			msg->data[0] = ABIS_OM_MDISC_FOM | 0x01;
+#endif
+		break;
+	case E1INP_SIGN_RSL:
+		proto = IPAC_PROTO_RSL;
+		break;
+	default:
+		msgb_free(msg);
+		bfd->when |= BSC_FD_WRITE; /* come back for more msg */
+		return -EINVAL;
+	}
+
+	msg->l2h = msg->data;
+	ipaccess_prepend_header(msg, sign_link->tei);
+
+	DEBUGP(DMI, "TX %u: %s\n", ts_nr, hexdump(msg->l2h, msgb_l2len(msg)));
+
+	ret = send(bfd->fd, msg->data, msg->len, 0);
+	msgb_free(msg);
+
+	/* set tx delay timer for next event */
+	e1i_ts->sign.tx_timer.cb = timeout_ts1_write;
+	e1i_ts->sign.tx_timer.data = e1i_ts;
+
+	/* Reducing this might break the nanoBTS 900 init. */
+	bsc_schedule_timer(&e1i_ts->sign.tx_timer, 0, e1i_ts->sign.delay);
+
+	return ret;
+}
+
+/* callback from select.c in case one of the fd's can be read/written */
+static int hsl_fd_cb(struct bsc_fd *bfd, unsigned int what)
+{
+	struct e1inp_line *line = bfd->data;
+	unsigned int ts_nr = bfd->priv_nr;
+	unsigned int idx = ts_nr-1;
+	struct e1inp_ts *e1i_ts;
+	int rc = 0;
+
+	/* In case of early RSL we might not yet have a line */
+
+	if (line)
+		e1i_ts = &line->ts[idx];
+
+	if (!line || e1i_ts->type == E1INP_TS_TYPE_SIGN) {
+		if (what & BSC_FD_READ)
+			rc = handle_ts1_read(bfd);
+		if (what & BSC_FD_WRITE)
+			rc = handle_ts1_write(bfd);
+	} else
+		LOGP(DINP, LOGL_ERROR, "unknown E1 TS type %u\n", e1i_ts->type);
+
+	return rc;
+}
+
+struct e1inp_driver hsl_driver = {
+	.name = "HSL",
+	.want_write = ts_want_write,
+	.default_delay = 0,
+};
+
+/* callback of the OML listening filedescriptor */
+static int listen_fd_cb(struct bsc_fd *listen_bfd, unsigned int what)
+{
+	int ret;
+	int idx = 0;
+	int i;
+	struct e1inp_line *line;
+	struct e1inp_ts *e1i_ts;
+	struct bsc_fd *bfd;
+	struct sockaddr_in sa;
+	socklen_t sa_len = sizeof(sa);
+
+	if (!(what & BSC_FD_READ))
+		return 0;
+
+	ret = accept(listen_bfd->fd, (struct sockaddr *) &sa, &sa_len);
+	if (ret < 0) {
+		perror("accept");
+		return ret;
+	}
+	LOGP(DINP, LOGL_NOTICE, "accept()ed new HSL link from %s\n",
+		inet_ntoa(sa.sin_addr));
+
+	line = talloc_zero(tall_bsc_ctx, struct e1inp_line);
+	if (!line) {
+		close(ret);
+		return -ENOMEM;
+	}
+	line->driver = &hsl_driver;
+	//line->driver_data = e1h;
+	/* create virrtual E1 timeslots for signalling */
+	e1inp_ts_config(&line->ts[1-1], line, E1INP_TS_TYPE_SIGN);
+
+	/* initialize the fds */
+	for (i = 0; i < ARRAY_SIZE(line->ts); ++i)
+		line->ts[i].driver.ipaccess.fd.fd = -1;
+
+	e1i_ts = &line->ts[idx];
+
+	bfd = &e1i_ts->driver.ipaccess.fd;
+	bfd->fd = ret;
+	bfd->data = line;
+	bfd->priv_nr = PRIV_OML;
+	bfd->cb = hsl_fd_cb;
+	bfd->when = BSC_FD_READ;
+	ret = bsc_register_fd(bfd);
+	if (ret < 0) {
+		LOGP(DINP, LOGL_ERROR, "could not register FD\n");
+		close(bfd->fd);
+		talloc_free(line);
+		return ret;
+	}
+
+        return ret;
+	//return e1inp_line_register(line);
+}
+
+int hsl_setup(struct gsm_network *gsmnet)
+{
+	int ret;
+
+	/* register the driver with the core */
+	/* FIXME: do this in the plugin initializer function */
+	ret = e1inp_driver_register(&hsl_driver);
+	if (ret)
+		return ret;
+
+	e1h = talloc_zero(tall_bsc_ctx, struct hsl_e1_handle);
+	if (!e1h)
+		return -ENOMEM;
+
+	e1h->gsmnet = gsmnet;
+
+	/* Listen for connections */
+	ret = make_sock(&e1h->listen_fd, IPPROTO_TCP, 0, HSL_TCP_PORT,
+			listen_fd_cb);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
diff --git a/src/libabis/input/ipaccess.c b/src/libabis/input/ipaccess.c
new file mode 100644
index 000000000..dcf8d1a53
--- /dev/null
+++ b/src/libabis/input/ipaccess.c
@@ -0,0 +1,797 @@
+/* OpenBSC Abis input driver for ip.access */
+
+/* (C) 2009 by Harald Welte <laforge@gnumonks.org>
+ * (C) 2010 by Holger Hans Peter Freyther
+ * (C) 2010 by On-Waves
+ *
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <string.h>
+#include <time.h>
+#include <sys/fcntl.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+#include <arpa/inet.h>
+
+#include <osmocore/select.h>
+#include <osmocore/tlv.h>
+#include <osmocore/msgb.h>
+#include <osmocore/talloc.h>
+#include <openbsc/debug.h>
+#include <openbsc/gsm_data.h>
+#include <openbsc/abis_nm.h>
+#include <openbsc/abis_rsl.h>
+#include <openbsc/subchan_demux.h>
+#include <openbsc/e1_input.h>
+#include <openbsc/ipaccess.h>
+#include <openbsc/socket.h>
+#include <openbsc/signal.h>
+
+#define PRIV_OML 1
+#define PRIV_RSL 2
+
+/* data structure for one E1 interface with A-bis */
+struct ia_e1_handle {
+	struct bsc_fd listen_fd;
+	struct bsc_fd rsl_listen_fd;
+	struct gsm_network *gsmnet;
+};
+
+static struct ia_e1_handle *e1h;
+
+
+#define TS1_ALLOC_SIZE	900
+
+static const u_int8_t pong[] = { 0, 1, IPAC_PROTO_IPACCESS, IPAC_MSGT_PONG };
+static const u_int8_t id_ack[] = { 0, 1, IPAC_PROTO_IPACCESS, IPAC_MSGT_ID_ACK };
+static const u_int8_t id_req[] = { 0, 17, IPAC_PROTO_IPACCESS, IPAC_MSGT_ID_GET,
+					0x01, IPAC_IDTAG_UNIT,
+					0x01, IPAC_IDTAG_MACADDR,
+					0x01, IPAC_IDTAG_LOCATION1,
+					0x01, IPAC_IDTAG_LOCATION2,
+					0x01, IPAC_IDTAG_EQUIPVERS,
+					0x01, IPAC_IDTAG_SWVERSION,
+					0x01, IPAC_IDTAG_UNITNAME,
+					0x01, IPAC_IDTAG_SERNR,
+				};
+
+static const char *idtag_names[] = {
+	[IPAC_IDTAG_SERNR]	= "Serial_Number",
+	[IPAC_IDTAG_UNITNAME]	= "Unit_Name",
+	[IPAC_IDTAG_LOCATION1]	= "Location_1",
+	[IPAC_IDTAG_LOCATION2]	= "Location_2",
+	[IPAC_IDTAG_EQUIPVERS]	= "Equipment_Version",
+	[IPAC_IDTAG_SWVERSION]	= "Software_Version",
+	[IPAC_IDTAG_IPADDR]	= "IP_Address",
+	[IPAC_IDTAG_MACADDR]	= "MAC_Address",
+	[IPAC_IDTAG_UNIT]	= "Unit_ID",
+};
+
+static const char *ipac_idtag_name(int tag)
+{
+	if (tag >= ARRAY_SIZE(idtag_names))
+		return "unknown";
+
+	return idtag_names[tag];
+}
+
+int ipaccess_idtag_parse(struct tlv_parsed *dec, unsigned char *buf, int len)
+{
+	u_int8_t t_len;
+	u_int8_t t_tag;
+	u_int8_t *cur = buf;
+
+	memset(dec, 0, sizeof(*dec));
+
+	while (len >= 2) {
+		len -= 2;
+		t_len = *cur++;
+		t_tag = *cur++;
+
+		if (t_len > len + 1) {
+			LOGP(DMI, LOGL_ERROR, "The tag does not fit: %d\n", t_len);
+			return -1;
+		}
+
+		DEBUGPC(DMI, "%s='%s' ", ipac_idtag_name(t_tag), cur);
+
+		dec->lv[t_tag].len = t_len;
+		dec->lv[t_tag].val = cur;
+
+		cur += t_len;
+		len -= t_len;
+	}
+	return 0;
+}
+
+struct gsm_bts *find_bts_by_unitid(struct gsm_network *net,
+				   u_int16_t site_id, u_int16_t bts_id)
+{
+	struct gsm_bts *bts;
+
+	llist_for_each_entry(bts, &net->bts_list, list) {
+
+		if (!is_ipaccess_bts(bts))
+			continue;
+
+		if (bts->ip_access.site_id == site_id &&
+		    bts->ip_access.bts_id == bts_id)
+			return bts;
+	}
+
+	return NULL;
+}
+
+static int parse_unitid(const char *str, u_int16_t *site_id, u_int16_t *bts_id,
+			u_int16_t *trx_id)
+{
+	unsigned long ul;
+	char *endptr;
+	const char *nptr;
+
+	nptr = str;
+	ul = strtoul(nptr, &endptr, 10);
+	if (endptr <= nptr)
+		return -EINVAL;
+	if (site_id)
+		*site_id = ul & 0xffff;
+
+	if (*endptr++ != '/')
+		return -EINVAL;
+
+	nptr = endptr;
+	ul = strtoul(nptr, &endptr, 10);
+	if (endptr <= nptr)
+		return -EINVAL;
+	if (bts_id)
+		*bts_id = ul & 0xffff;
+
+	if (*endptr++ != '/')
+		return -EINVAL;
+	
+	nptr = endptr;
+	ul = strtoul(nptr, &endptr, 10);
+	if (endptr <= nptr)
+		return -EINVAL;
+	if (trx_id)
+		*trx_id = ul & 0xffff;
+
+	return 0;
+}
+
+/* send the id ack */
+int ipaccess_send_id_ack(int fd)
+{
+	return write(fd, id_ack, sizeof(id_ack));
+}
+
+int ipaccess_send_id_req(int fd)
+{
+	return write(fd, id_req, sizeof(id_req));
+}
+
+/* base handling of the ip.access protocol */
+int ipaccess_rcvmsg_base(struct msgb *msg,
+			 struct bsc_fd *bfd)
+{
+	u_int8_t msg_type = *(msg->l2h);
+	int ret = 0;
+
+	switch (msg_type) {
+	case IPAC_MSGT_PING:
+		ret = write(bfd->fd, pong, sizeof(pong));
+		break;
+	case IPAC_MSGT_PONG:
+		DEBUGP(DMI, "PONG!\n");
+		break;
+	case IPAC_MSGT_ID_ACK:
+		DEBUGP(DMI, "ID_ACK? -> ACK!\n");
+		ret = ipaccess_send_id_ack(bfd->fd);
+		break;
+	}
+	return 0;
+}
+
+static int ipaccess_rcvmsg(struct e1inp_line *line, struct msgb *msg,
+			   struct bsc_fd *bfd)
+{
+	struct tlv_parsed tlvp;
+	u_int8_t msg_type = *(msg->l2h);
+	u_int16_t site_id = 0, bts_id = 0, trx_id = 0;
+	struct gsm_bts *bts;
+	char *unitid;
+	int len;
+
+	/* handle base messages */
+	ipaccess_rcvmsg_base(msg, bfd);
+
+	switch (msg_type) {
+	case IPAC_MSGT_ID_RESP:
+		DEBUGP(DMI, "ID_RESP ");
+		/* parse tags, search for Unit ID */
+		ipaccess_idtag_parse(&tlvp, (u_int8_t *)msg->l2h + 2,
+				 msgb_l2len(msg)-2);
+		DEBUGP(DMI, "\n");
+
+		if (!TLVP_PRESENT(&tlvp, IPAC_IDTAG_UNIT))
+			break;
+
+		len = TLVP_LEN(&tlvp, IPAC_IDTAG_UNIT);
+		if (len < 1)
+			break;
+
+		/* lookup BTS, create sign_link, ... */
+		unitid = (char *) TLVP_VAL(&tlvp, IPAC_IDTAG_UNIT);
+		unitid[len - 1] = '\0';
+		parse_unitid(unitid, &site_id, &bts_id, &trx_id);
+		bts = find_bts_by_unitid(e1h->gsmnet, site_id, bts_id);
+		if (!bts) {
+			LOGP(DINP, LOGL_ERROR, "Unable to find BTS configuration for "
+			       " %u/%u/%u, disconnecting\n", site_id, bts_id,
+				trx_id);
+			return -EIO;
+		}
+		DEBUGP(DINP, "Identified BTS %u/%u/%u\n", site_id, bts_id, trx_id);
+		if (bfd->priv_nr == PRIV_OML) {
+			/* drop any old oml connection */
+			ipaccess_drop_oml(bts);
+			bts->oml_link = e1inp_sign_link_create(&line->ts[PRIV_OML - 1],
+						  E1INP_SIGN_OML, bts->c0,
+						  bts->oml_tei, 0);
+		} else if (bfd->priv_nr == PRIV_RSL) {
+			struct e1inp_ts *e1i_ts;
+			struct bsc_fd *newbfd;
+			struct gsm_bts_trx *trx = gsm_bts_trx_num(bts, trx_id);
+
+			/* drop any old rsl connection */
+			ipaccess_drop_rsl(trx);
+
+			if (!bts->oml_link) {
+				bsc_unregister_fd(bfd);
+				close(bfd->fd);
+				bfd->fd = -1;
+				talloc_free(bfd);
+				return 0;
+			}
+
+			bfd->data = line = bts->oml_link->ts->line;
+			e1i_ts = &line->ts[PRIV_RSL + trx_id - 1];
+			newbfd = &e1i_ts->driver.ipaccess.fd;
+			e1inp_ts_config(e1i_ts, line, E1INP_TS_TYPE_SIGN);
+
+			trx->rsl_link = e1inp_sign_link_create(e1i_ts,
+							E1INP_SIGN_RSL, trx,
+							trx->rsl_tei, 0);
+			trx->rsl_link->ts->sign.delay = 0;
+
+			/* get rid of our old temporary bfd */
+			memcpy(newbfd, bfd, sizeof(*newbfd));
+			newbfd->priv_nr = PRIV_RSL + trx_id;
+			bsc_unregister_fd(bfd);
+			bfd->fd = -1;
+			talloc_free(bfd);
+			bsc_register_fd(newbfd);
+		}
+		break;
+	}
+	return 0;
+}
+
+#define OML_UP		0x0001
+#define RSL_UP		0x0002
+
+/*
+ * read one ipa message from the socket
+ * return NULL in case of error
+ */
+struct msgb *ipaccess_read_msg(struct bsc_fd *bfd, int *error)
+{
+	struct msgb *msg = msgb_alloc(TS1_ALLOC_SIZE, "Abis/IP");
+	struct ipaccess_head *hh;
+	int len, ret = 0;
+
+	if (!msg) {
+		*error = -ENOMEM;
+		return NULL;
+	}
+
+	/* first read our 3-byte header */
+	hh = (struct ipaccess_head *) msg->data;
+	ret = recv(bfd->fd, msg->data, sizeof(*hh), 0);
+	if (ret == 0) {
+		msgb_free(msg);
+		*error = ret;
+		return NULL;
+	} else if (ret != sizeof(*hh)) {
+		if (errno != EAGAIN)
+			LOGP(DINP, LOGL_ERROR, "recv error %d %s\n", ret, strerror(errno));
+		msgb_free(msg);
+		*error = ret;
+		return NULL;
+	}
+
+	msgb_put(msg, ret);
+
+	/* then read te length as specified in header */
+	msg->l2h = msg->data + sizeof(*hh);
+	len = ntohs(hh->len);
+
+	if (len < 0 || TS1_ALLOC_SIZE < len + sizeof(*hh)) {
+		LOGP(DINP, LOGL_ERROR, "Can not read this packet. %d avail\n", len);
+		msgb_free(msg);
+		*error = -EIO;
+		return NULL;
+	}
+
+	ret = recv(bfd->fd, msg->l2h, len, 0);
+	if (ret < len) {
+		LOGP(DINP, LOGL_ERROR, "short read! Got %d from %d\n", ret, len);
+		msgb_free(msg);
+		*error = -EIO;
+		return NULL;
+	}
+	msgb_put(msg, ret);
+
+	return msg;
+}
+
+int ipaccess_drop_oml(struct gsm_bts *bts)
+{
+	struct gsm_bts_trx *trx;
+	struct e1inp_ts *ts;
+	struct e1inp_line *line;
+	struct bsc_fd *bfd;
+
+	if (!bts || !bts->oml_link)
+		return -1;
+
+	/* send OML down */
+	ts = bts->oml_link->ts;
+	line = ts->line;
+	e1inp_event(ts, S_INP_TEI_DN, bts->oml_link->tei, bts->oml_link->sapi);
+
+	bfd = &ts->driver.ipaccess.fd;
+	bsc_unregister_fd(bfd);
+	close(bfd->fd);
+	bfd->fd = -1;
+
+	/* clean up OML and RSL */
+	e1inp_sign_link_destroy(bts->oml_link);
+	bts->oml_link = NULL;
+	bts->ip_access.flags = 0;
+
+	/* drop all RSL connections too */
+	llist_for_each_entry(trx, &bts->trx_list, list)
+		ipaccess_drop_rsl(trx);
+
+	/* kill the E1 line now... as we have no one left to use it */
+	talloc_free(line);
+
+	return -1;
+}
+
+static int ipaccess_drop(struct e1inp_ts *ts, struct bsc_fd *bfd)
+{
+	struct e1inp_sign_link *link;
+	int bts_nr;
+
+	if (!ts) {
+		/*
+		 * If we don't have a TS this means that this is a RSL
+		 * connection but we are not past the authentication
+		 * handling yet. So we can safely delete this bfd and
+		 * wait for a reconnect.
+		 */
+		bsc_unregister_fd(bfd);
+		close(bfd->fd);
+		bfd->fd = -1;
+		talloc_free(bfd);
+		return -1;
+	}
+
+	/* attempt to find a signalling link */
+	if (ts->type == E1INP_TS_TYPE_SIGN) {
+		llist_for_each_entry(link, &ts->sign.sign_links, list) {
+			bts_nr = link->trx->bts->bts_nr;
+			/* we have issues just reconnecting RLS so we drop OML */
+			ipaccess_drop_oml(link->trx->bts);
+			return bts_nr;
+		}
+	}
+
+	/* error case */
+	LOGP(DINP, LOGL_ERROR, "Failed to find a signalling link for ts: %p\n", ts);
+	bsc_unregister_fd(bfd);
+	close(bfd->fd);
+	bfd->fd = -1;
+	return -1;
+}
+
+int ipaccess_drop_rsl(struct gsm_bts_trx *trx)
+{
+	struct bsc_fd *bfd;
+	struct e1inp_ts *ts;
+
+	if (!trx || !trx->rsl_link)
+		return -1;
+
+	/* send RSL down */
+	ts = trx->rsl_link->ts;
+	e1inp_event(ts, S_INP_TEI_DN, trx->rsl_link->tei, trx->rsl_link->sapi);
+
+	/* close the socket */
+	bfd = &ts->driver.ipaccess.fd;
+	bsc_unregister_fd(bfd);
+	close(bfd->fd);
+	bfd->fd = -1;
+
+	/* destroy */
+	e1inp_sign_link_destroy(trx->rsl_link);
+	trx->rsl_link = NULL;
+
+	return -1;
+}
+
+static int handle_ts1_read(struct bsc_fd *bfd)
+{
+	struct e1inp_line *line = bfd->data;
+	unsigned int ts_nr = bfd->priv_nr;
+	struct e1inp_ts *e1i_ts = &line->ts[ts_nr-1];
+	struct e1inp_sign_link *link;
+	struct msgb *msg;
+	struct ipaccess_head *hh;
+	int ret = 0, error;
+
+	msg = ipaccess_read_msg(bfd, &error);
+	if (!msg) {
+		if (error == 0) {
+			int ret = ipaccess_drop(e1i_ts, bfd);
+			if (ret >= 0)
+				LOGP(DINP, LOGL_NOTICE, "BTS %u disappeared, dead socket\n",
+					ret);
+			else
+				LOGP(DINP, LOGL_NOTICE, "unknown BTS disappeared, dead socket\n");
+		}
+		return error;
+	}
+
+	DEBUGP(DMI, "RX %u: %s\n", ts_nr, hexdump(msgb_l2(msg), msgb_l2len(msg)));
+
+	hh = (struct ipaccess_head *) msg->data;
+	if (hh->proto == IPAC_PROTO_IPACCESS) {
+		ret = ipaccess_rcvmsg(line, msg, bfd);
+		if (ret < 0)
+			ipaccess_drop(e1i_ts, bfd);
+		msgb_free(msg);
+		return ret;
+	}
+	/* BIG FAT WARNING: bfd might no longer exist here, since ipaccess_rcvmsg()
+	 * might have free'd it !!! */
+
+	link = e1inp_lookup_sign_link(e1i_ts, hh->proto, 0);
+	if (!link) {
+		LOGP(DINP, LOGL_ERROR, "no matching signalling link for "
+			"hh->proto=0x%02x\n", hh->proto);
+		msgb_free(msg);
+		return -EIO;
+	}
+	msg->trx = link->trx;
+
+	switch (link->type) {
+	case E1INP_SIGN_RSL:
+		if (!(msg->trx->bts->ip_access.flags & (RSL_UP << msg->trx->nr))) {
+			e1inp_event(e1i_ts, S_INP_TEI_UP, link->tei, link->sapi);
+			msg->trx->bts->ip_access.flags |= (RSL_UP << msg->trx->nr);
+		}
+		ret = abis_rsl_rcvmsg(msg);
+		break;
+	case E1INP_SIGN_OML:
+		if (!(msg->trx->bts->ip_access.flags & OML_UP)) {
+			e1inp_event(e1i_ts, S_INP_TEI_UP, link->tei, link->sapi);
+			msg->trx->bts->ip_access.flags |= OML_UP;
+		}
+		ret = abis_nm_rcvmsg(msg);
+		break;
+	default:
+		LOGP(DINP, LOGL_NOTICE, "Unknown IP.access protocol proto=0x%02x\n", hh->proto);
+		msgb_free(msg);
+		break;
+	}
+	return ret;
+}
+
+void ipaccess_prepend_header(struct msgb *msg, int proto)
+{
+	struct ipaccess_head *hh;
+
+	/* prepend the ip.access header */
+	hh = (struct ipaccess_head *) msgb_push(msg, sizeof(*hh));
+	hh->len = htons(msg->len - sizeof(*hh));
+	hh->proto = proto;
+}
+
+static int ts_want_write(struct e1inp_ts *e1i_ts)
+{
+	e1i_ts->driver.ipaccess.fd.when |= BSC_FD_WRITE;
+
+	return 0;
+}
+
+static void timeout_ts1_write(void *data)
+{
+	struct e1inp_ts *e1i_ts = (struct e1inp_ts *)data;
+
+	/* trigger write of ts1, due to tx delay timer */
+	ts_want_write(e1i_ts);
+}
+
+static int handle_ts1_write(struct bsc_fd *bfd)
+{
+	struct e1inp_line *line = bfd->data;
+	unsigned int ts_nr = bfd->priv_nr;
+	struct e1inp_ts *e1i_ts = &line->ts[ts_nr-1];
+	struct e1inp_sign_link *sign_link;
+	struct msgb *msg;
+	u_int8_t proto;
+	int ret;
+
+	bfd->when &= ~BSC_FD_WRITE;
+
+	/* get the next msg for this timeslot */
+	msg = e1inp_tx_ts(e1i_ts, &sign_link);
+	if (!msg) {
+		/* no message after tx delay timer */
+		return 0;
+	}
+
+	switch (sign_link->type) {
+	case E1INP_SIGN_OML:
+		proto = IPAC_PROTO_OML;
+		break;
+	case E1INP_SIGN_RSL:
+		proto = IPAC_PROTO_RSL;
+		break;
+	default:
+		msgb_free(msg);
+		bfd->when |= BSC_FD_WRITE; /* come back for more msg */
+		return -EINVAL;
+	}
+
+	msg->l2h = msg->data;
+	ipaccess_prepend_header(msg, sign_link->tei);
+
+	DEBUGP(DMI, "TX %u: %s\n", ts_nr, hexdump(msg->l2h, msgb_l2len(msg)));
+
+	ret = send(bfd->fd, msg->data, msg->len, 0);
+	msgb_free(msg);
+
+	/* set tx delay timer for next event */
+	e1i_ts->sign.tx_timer.cb = timeout_ts1_write;
+	e1i_ts->sign.tx_timer.data = e1i_ts;
+
+	/* Reducing this might break the nanoBTS 900 init. */
+	bsc_schedule_timer(&e1i_ts->sign.tx_timer, 0, e1i_ts->sign.delay);
+
+	return ret;
+}
+
+/* callback from select.c in case one of the fd's can be read/written */
+static int ipaccess_fd_cb(struct bsc_fd *bfd, unsigned int what)
+{
+	struct e1inp_line *line = bfd->data;
+	unsigned int ts_nr = bfd->priv_nr;
+	unsigned int idx = ts_nr-1;
+	struct e1inp_ts *e1i_ts;
+	int rc = 0;
+
+	/* In case of early RSL we might not yet have a line */
+
+	if (line)
+ 		e1i_ts = &line->ts[idx];
+
+	if (!line || e1i_ts->type == E1INP_TS_TYPE_SIGN) {
+		if (what & BSC_FD_READ)
+			rc = handle_ts1_read(bfd);
+		if (what & BSC_FD_WRITE)
+			rc = handle_ts1_write(bfd);
+	} else
+		LOGP(DINP, LOGL_ERROR, "unknown E1 TS type %u\n", e1i_ts->type);
+
+	return rc;
+}
+
+struct e1inp_driver ipaccess_driver = {
+	.name = "ip.access",
+	.want_write = ts_want_write,
+	.default_delay = 0,
+};
+
+/* callback of the OML listening filedescriptor */
+static int listen_fd_cb(struct bsc_fd *listen_bfd, unsigned int what)
+{
+	int ret;
+	int idx = 0;
+	int i;
+	struct e1inp_line *line;
+	struct e1inp_ts *e1i_ts;
+	struct bsc_fd *bfd;
+	struct sockaddr_in sa;
+	socklen_t sa_len = sizeof(sa);
+
+	if (!(what & BSC_FD_READ))
+		return 0;
+
+	ret = accept(listen_bfd->fd, (struct sockaddr *) &sa, &sa_len);
+	if (ret < 0) {
+		perror("accept");
+		return ret;
+	}
+	LOGP(DINP, LOGL_NOTICE, "accept()ed new OML link from %s\n",
+		inet_ntoa(sa.sin_addr));
+
+	line = talloc_zero(tall_bsc_ctx, struct e1inp_line);
+	if (!line) {
+		close(ret);
+		return -ENOMEM;
+	}
+	line->driver = &ipaccess_driver;
+	//line->driver_data = e1h;
+	/* create virrtual E1 timeslots for signalling */
+	e1inp_ts_config(&line->ts[1-1], line, E1INP_TS_TYPE_SIGN);
+
+	/* initialize the fds */
+	for (i = 0; i < ARRAY_SIZE(line->ts); ++i)
+		line->ts[i].driver.ipaccess.fd.fd = -1;
+
+	e1i_ts = &line->ts[idx];
+
+	bfd = &e1i_ts->driver.ipaccess.fd;
+	bfd->fd = ret;
+	bfd->data = line;
+	bfd->priv_nr = PRIV_OML;
+	bfd->cb = ipaccess_fd_cb;
+	bfd->when = BSC_FD_READ;
+	ret = bsc_register_fd(bfd);
+	if (ret < 0) {
+		LOGP(DINP, LOGL_ERROR, "could not register FD\n");
+		close(bfd->fd);
+		talloc_free(line);
+		return ret;
+	}
+
+	/* Request ID. FIXME: request LOCATION, HW/SW VErsion, Unit Name, Serno */
+	ret = ipaccess_send_id_req(bfd->fd);
+
+        return ret;
+	//return e1inp_line_register(line);
+}
+
+static int rsl_listen_fd_cb(struct bsc_fd *listen_bfd, unsigned int what)
+{
+	struct sockaddr_in sa;
+	socklen_t sa_len = sizeof(sa);
+	struct bsc_fd *bfd;
+	int ret;
+
+	if (!(what & BSC_FD_READ))
+		return 0;
+
+	bfd = talloc_zero(tall_bsc_ctx, struct bsc_fd);
+	if (!bfd)
+		return -ENOMEM;
+
+	/* Some BTS has connected to us, but we don't know yet which line
+	 * (as created by the OML link) to associate it with.  Thus, we
+	 * allocate a temporary bfd until we have received ID from BTS */
+
+	bfd->fd = accept(listen_bfd->fd, (struct sockaddr *) &sa, &sa_len);
+	if (bfd->fd < 0) {
+		perror("accept");
+		return bfd->fd;
+	}
+	LOGP(DINP, LOGL_NOTICE, "accept()ed new RSL link from %s\n", inet_ntoa(sa.sin_addr));
+	bfd->priv_nr = PRIV_RSL;
+	bfd->cb = ipaccess_fd_cb;
+	bfd->when = BSC_FD_READ;
+	ret = bsc_register_fd(bfd);
+	if (ret < 0) {
+		LOGP(DINP, LOGL_ERROR, "could not register FD\n");
+		close(bfd->fd);
+		talloc_free(bfd);
+		return ret;
+	}
+	/* Request ID. FIXME: request LOCATION, HW/SW VErsion, Unit Name, Serno */
+	ret = write(bfd->fd, id_req, sizeof(id_req));
+
+	return 0;
+}
+
+/* Actively connect to a BTS.  Currently used by ipaccess-config.c */
+int ipaccess_connect(struct e1inp_line *line, struct sockaddr_in *sa)
+{
+	struct e1inp_ts *e1i_ts = &line->ts[0];
+	struct bsc_fd *bfd = &e1i_ts->driver.ipaccess.fd;
+	int ret, on = 1;
+
+	bfd->fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
+	bfd->cb = ipaccess_fd_cb;
+	bfd->when = BSC_FD_READ | BSC_FD_WRITE;
+	bfd->data = line;
+	bfd->priv_nr = PRIV_OML;
+
+	if (bfd->fd < 0) {
+		LOGP(DINP, LOGL_ERROR, "could not create TCP socket.\n");
+		return -EIO;
+	}
+
+	setsockopt(bfd->fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
+
+	ret = connect(bfd->fd, (struct sockaddr *) sa, sizeof(*sa));
+	if (ret < 0) {
+		LOGP(DINP, LOGL_ERROR, "could not connect socket\n");
+		close(bfd->fd);
+		return ret;
+	}
+
+	ret = bsc_register_fd(bfd);
+	if (ret < 0) {
+		close(bfd->fd);
+		return ret;
+	}
+	
+	line->driver = &ipaccess_driver;
+
+        return ret;
+	//return e1inp_line_register(line);
+}
+
+int ipaccess_setup(struct gsm_network *gsmnet)
+{
+	int ret;
+
+	/* register the driver with the core */
+	/* FIXME: do this in the plugin initializer function */
+	ret = e1inp_driver_register(&ipaccess_driver);
+	if (ret)
+		return ret;
+
+	e1h = talloc_zero(tall_bsc_ctx, struct ia_e1_handle);
+	if (!e1h)
+		return -ENOMEM;
+
+	e1h->gsmnet = gsmnet;
+
+	/* Listen for OML connections */
+	ret = make_sock(&e1h->listen_fd, IPPROTO_TCP, 0, IPA_TCP_PORT_OML,
+			listen_fd_cb);
+	if (ret < 0)
+		return ret;
+
+	/* Listen for RSL connections */
+	ret = make_sock(&e1h->rsl_listen_fd, IPPROTO_TCP, 0,
+			IPA_TCP_PORT_RSL, rsl_listen_fd_cb);
+	if (ret < 0)
+		return ret;
+
+	return ret;
+}
diff --git a/src/libabis/input/lapd.c b/src/libabis/input/lapd.c
new file mode 100644
index 000000000..7bce6cc51
--- /dev/null
+++ b/src/libabis/input/lapd.c
@@ -0,0 +1,710 @@
+/* OpenBSC minimal LAPD implementation */
+
+/* (C) 2009 by oystein@homelien.no
+ * (C) 2009 by Holger Hans Peter Freyther <zecke@selfish.org>
+ * (C) 2010 by Digium and Matthew Fredrickson <creslin@digium.com>
+ * (C) 2011 by Harald Welte <laforge@gnumonks.org>
+ *
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ */
+
+/* TODO:
+	* detect RR timeout and set SAP state back to SABM_RETRANSMIT
+	* use of value_string
+	* further code cleanup (spaghetti)
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <assert.h>
+#include <errno.h>
+
+#include "lapd.h"
+
+#include <osmocore/linuxlist.h>
+#include <osmocore/talloc.h>
+#include <osmocore/msgb.h>
+#include <osmocore/timer.h>
+#include <openbsc/debug.h>
+
+#define SABM_INTERVAL		0, 300000
+
+typedef enum {
+	LAPD_TEI_NONE = 0,
+	LAPD_TEI_ASSIGNED,
+	LAPD_TEI_ACTIVE,
+} lapd_tei_state;
+
+const char *lapd_tei_states[] = {
+	"NONE",
+	"ASSIGNED",
+	"ACTIVE",
+};
+
+typedef enum {
+	LAPD_TYPE_NONE = 0,
+
+	LAPD_TYPE_I,
+	LAPD_TYPE_S,
+	LAPD_TYPE_U,
+} lapd_msg_type;
+
+typedef enum {
+	/* commands/responses */
+	LAPD_CMD_NONE = 0,
+
+	LAPD_CMD_I,
+	LAPD_CMD_RR,
+	LAPD_CMD_RNR,
+	LAPD_CMD_REJ,
+
+	LAPD_CMD_SABME,
+	LAPD_CMD_DM,
+	LAPD_CMD_UI,
+	LAPD_CMD_DISC,
+	LAPD_CMD_UA,
+	LAPD_CMD_FRMR,
+	LAPD_CMD_XID,
+} lapd_cmd_type;
+
+const char *lapd_cmd_types[] = {
+	"NONE",
+
+	"I",
+	"RR",
+	"RNR",
+	"REJ",
+
+	"SABME",
+	"DM",
+	"UI",
+	"DISC",
+	"UA",
+	"FRMR",
+	"XID",
+
+};
+
+enum lapd_sap_state {
+	SAP_STATE_INACTIVE,
+	SAP_STATE_SABM_RETRANS,
+	SAP_STATE_ACTIVE,
+};
+
+const char *lapd_sap_states[] = {
+	"INACTIVE",
+	"SABM_RETRANS",
+	"ACTIVE",
+};
+
+const char *lapd_msg_types = "?ISU";
+
+/* structure representing an allocated TEI within a LAPD instance */
+struct lapd_tei {
+	struct llist_head list;
+	struct lapd_instance *li;
+	uint8_t tei;
+	lapd_tei_state state;
+
+	struct llist_head sap_list;
+};
+
+/* Structure representing a SAP within a TEI. We use this for TE-mode to
+ * re-transmit SABM */
+struct lapd_sap {
+	struct llist_head list;
+	struct lapd_tei *tei;
+	uint8_t sapi;
+	enum lapd_sap_state state;
+
+	/* A valid N(R) value is one that is in the range V(A) ≤ N(R) ≤ V(S). */
+	int vs;			/* next to be transmitted */
+	int va;			/* last acked by peer */
+	int vr;			/* next expected to be received */
+
+	struct timer_list sabme_timer;	/* timer to re-transmit SABM message */
+};
+
+/* 3.5.2.2   Send state variable V(S)
+ * Each point-to-point data link connection endpoint shall have an associated V(S) when using I frame
+ * commands. V(S) denotes the sequence number of the next I frame to be transmitted. The V(S) can
+ * take on the value 0 through n minus 1. The value of V(S) shall be incremented by 1 with each
+ * successive I frame transmission, and shall not exceed V(A) by more than the maximum number of
+ * outstanding I frames k. The value of k may be in the range of 1 ≤ k ≤ 127.
+ *
+ * 3.5.2.3   Acknowledge state variable V(A)
+ * Each point-to-point data link connection endpoint shall have an associated V(A) when using I frame
+ * commands and supervisory frame commands/responses. V(A) identifies the last I frame that has been
+ * acknowledged by its peer [V(A) − 1 equals the N(S) of the last acknowledged I frame]. V(A) can
+ * take on the value 0 through n minus 1. The value of V(A) shall be updated by the valid N(R) values
+ * received from its peer (see 3.5.2.6). A valid N(R) value is one that is in the range V(A) ≤ N(R) ≤
+ * V(S).
+ *
+ * 3.5.2.5    Receive state variable V(R)
+ * Each point-to-point data link connection endpoint shall have an associated V(R) when using I frame
+ * commands and supervisory frame commands/responses. V(R) denotes the sequence number of the
+ * next in-sequence I frame expected to be received. V(R) can take on the value 0 through n minus 1.
+ * The value of V(R) shall be incremented by one with the receipt of an error-free, in-sequence I frame
+ * whose N(S) equals V(R).
+ */
+#define	LAPD_NS(sap) (sap->vs)
+#define	LAPD_NR(sap) (sap->vr)
+
+/* 3.5.2.4    Send sequence number N(S)
+ * Only I frames contain N(S), the send sequence number of transmitted I frames. At the time that an in-
+ * sequence I frame is designated for transmission, the value of N(S) is set equal to V(S).
+ *
+ * 3.5.2.6    Receive sequence number N(R)
+ * All I frames and supervisory frames contain N(R), the expected send sequence number of the next
+ * received I frame. At the time that a frame of the above types is designated for transmission, the value
+ * of N(R) is set equal to V(R). N(R) indicates that the data link layer entity transmitting the N(R) has
+ * correctly received all I frames numbered up to and including N(R) − 1.
+ */
+
+/* Resolve TEI structure from given numeric TEI */
+static struct lapd_tei *teip_from_tei(struct lapd_instance *li, uint8_t tei)
+{
+	struct lapd_tei *lt;
+
+	llist_for_each_entry(lt, &li->tei_list, list) {
+		if (lt->tei == tei)
+			return lt;
+	}
+	return NULL;
+};
+
+static void lapd_tei_set_state(struct lapd_tei *teip, int newstate)
+{
+	DEBUGP(DMI, "state change on TEI %d: %s -> %s\n", teip->tei,
+		   lapd_tei_states[teip->state], lapd_tei_states[newstate]);
+	teip->state = newstate;
+};
+
+/* Allocate a new TEI */
+struct lapd_tei *lapd_tei_alloc(struct lapd_instance *li, uint8_t tei)
+{
+	struct lapd_tei *teip;
+
+	teip = talloc_zero(li, struct lapd_tei);
+	if (!teip)
+		return NULL;
+
+	teip->li = li;
+	teip->tei = tei;
+	llist_add(&teip->list, &li->tei_list);
+	INIT_LLIST_HEAD(&teip->sap_list);
+
+	lapd_tei_set_state(teip, LAPD_TEI_ASSIGNED);
+
+	return teip;
+}
+
+/* Find a SAP within a given TEI */
+static struct lapd_sap *lapd_sap_find(struct lapd_tei *teip, uint8_t sapi)
+{
+	struct lapd_sap *sap;
+
+	llist_for_each_entry(sap, &teip->sap_list, list) {
+		if (sap->sapi == sapi)
+			return sap;
+	}
+
+	return NULL;
+}
+
+static void sabme_timer_cb(void *_sap);
+
+/* Allocate a new SAP within a given TEI */
+static struct lapd_sap *lapd_sap_alloc(struct lapd_tei *teip, uint8_t sapi)
+{
+	struct lapd_sap *sap = talloc_zero(teip, struct lapd_sap);
+
+	LOGP(DMI, LOGL_INFO, "Allocating SAP for SAPI=%u / TEI=%u\n",
+		sapi, teip->tei);
+
+	sap->sapi = sapi;
+	sap->tei = teip;
+	sap->sabme_timer.cb = &sabme_timer_cb;
+	sap->sabme_timer.data = sap;
+
+	llist_add(&sap->list, &teip->sap_list);
+
+	return sap;
+}
+
+static void lapd_sap_set_state(struct lapd_tei *teip, uint8_t sapi,
+				enum lapd_sap_state newstate)
+{
+	struct lapd_sap *sap = lapd_sap_find(teip, sapi);
+	if (!sap)
+		return;
+
+	DEBUGP(DMI, "state change on TEI %u / SAPI %u: %s -> %s\n", teip->tei,
+		sapi, lapd_sap_states[sap->state], lapd_sap_states[newstate]);
+	switch (sap->state) {
+	case SAP_STATE_SABM_RETRANS:
+		if (newstate != SAP_STATE_SABM_RETRANS)
+			bsc_del_timer(&sap->sabme_timer);
+		break;
+	default:
+		if (newstate == SAP_STATE_SABM_RETRANS)
+			bsc_schedule_timer(&sap->sabme_timer, SABM_INTERVAL);
+		break;
+	}
+
+	sap->state = newstate;
+};
+
+/* Input function into TEI manager */
+static void lapd_tei_receive(struct lapd_instance *li, uint8_t *data, int len)
+{
+	uint8_t entity = data[0];
+	uint8_t ref = data[1];
+	uint8_t mt = data[3];
+	uint8_t action = data[4] >> 1;
+	uint8_t e = data[4] & 1;
+	uint8_t resp[8];
+	struct lapd_tei *teip;
+
+	DEBUGP(DMI, "TEIMGR: entity %x, ref %x, mt %x, action %x, e %x\n", entity, ref, mt, action, e);
+
+	switch (mt) {
+	case 0x01:	/* IDENTITY REQUEST */
+		DEBUGP(DMI, "TEIMGR: identity request for TEI %u\n", action);
+
+		teip = teip_from_tei(li, action);
+		if (!teip) {
+			LOGP(DMI, LOGL_INFO, "TEI MGR: New TEI %u\n", action);
+			lapd_tei_alloc(li, action);
+		}
+
+		/* Send ACCEPT */
+		memmove(resp, "\xfe\xff\x03\x0f\x00\x00\x02\x00", 8);
+		resp[7] = (action << 1) | 1;
+		li->transmit_cb(resp, 8, li->cbdata);
+
+		if (teip->state == LAPD_TEI_NONE)
+			lapd_tei_set_state(teip, LAPD_TEI_ASSIGNED);
+		break;
+	default:
+		LOGP(DMI, LOGL_NOTICE, "TEIMGR: unknown mt %x action %x\n",
+		     mt, action);
+		break;
+	};
+};
+
+/* General input function for any data received for this LAPD instance */
+uint8_t *lapd_receive(struct lapd_instance *li, uint8_t * data, unsigned int len,
+		      int *ilen, lapd_mph_type *prim)
+{
+	uint8_t sapi, cr, tei, command;
+	int pf, ns, nr;
+	uint8_t *contents;
+	struct lapd_tei *teip;
+	struct lapd_sap *sap;
+
+	uint8_t resp[8];
+	int l = 0;
+
+	*ilen = 0;
+	*prim = 0;
+
+	if (len < 2) {
+		DEBUGP(DMI, "len %d < 2\n", len);
+		return NULL;
+	};
+
+	if ((data[0] & 1) != 0 || (data[1] & 1) != 1) {
+		DEBUGP(DMI, "address field %x/%x not well formed\n", data[0],
+			   data[1]);
+		return NULL;
+	};
+
+	sapi = data[0] >> 2;
+	cr = (data[0] >> 1) & 1;
+	tei = data[1] >> 1;
+	command = li->network_side ^ cr;
+	//DEBUGP(DMI, "  address sapi %x tei %d cmd %d cr %d\n", sapi, tei, command, cr);
+
+	if (len < 3) {
+		DEBUGP(DMI, "len %d < 3\n", len);
+		return NULL;
+	};
+
+	lapd_msg_type typ = 0;
+	lapd_cmd_type cmd = 0;
+	pf = -1;
+	ns = -1;
+	nr = -1;
+	if ((data[2] & 1) == 0) {
+		typ = LAPD_TYPE_I;
+		assert(len >= 4);
+		ns = data[2] >> 1;
+		nr = data[3] >> 1;
+		pf = data[3] & 1;
+		cmd = LAPD_CMD_I;
+	} else if ((data[2] & 3) == 1) {
+		typ = LAPD_TYPE_S;
+		assert(len >= 4);
+		nr = data[3] >> 1;
+		pf = data[3] & 1;
+		switch (data[2]) {
+		case 0x1:
+			cmd = LAPD_CMD_RR;
+			break;
+		case 0x5:
+			cmd = LAPD_CMD_RNR;
+			break;
+		case 0x9:
+			cmd = LAPD_CMD_REJ;
+			break;
+		default:
+			LOGP(DMI, LOGL_ERROR, "unknown LAPD S cmd %x\n", data[2]);
+			return NULL;
+		};
+	} else if ((data[2] & 3) == 3) {
+		typ = LAPD_TYPE_U;
+		pf = (data[2] >> 4) & 1;
+		int val = data[2] & ~(1 << 4);
+		switch (val) {
+		case 0x6f:
+			cmd = LAPD_CMD_SABME;
+			break;
+		case 0x0f:
+			cmd = LAPD_CMD_DM;
+			break;
+		case 0x03:
+			cmd = LAPD_CMD_UI;
+			break;
+		case 0x43:
+			cmd = LAPD_CMD_DISC;
+			break;
+		case 0x63:
+			cmd = LAPD_CMD_UA;
+			break;
+		case 0x87:
+			cmd = LAPD_CMD_FRMR;
+			break;
+		case 0xaf:
+			cmd = LAPD_CMD_XID;
+			break;
+
+		default:
+			LOGP(DMI, LOGL_ERROR, "unknown U cmd %x "
+			     "(pf %x data %x)\n", val, pf, data[2]);
+			return NULL;
+		};
+	};
+
+	contents = &data[4];
+	if (typ == LAPD_TYPE_U)
+		contents--;
+	*ilen = len - (contents - data);
+
+	if (tei == 127)
+		lapd_tei_receive(li, contents, *ilen);
+
+	teip = teip_from_tei(li, tei);
+	if (!teip) {
+		LOGP(DMI, LOGL_NOTICE, "Unknown TEI %u\n", tei);
+		return NULL;
+	}
+
+	sap = lapd_sap_find(teip, sapi);
+	if (!sap) {
+		LOGP(DMI, LOGL_INFO, "No SAP for TEI=%u / SAPI=%u, "
+			"allocating\n", tei, sapi);
+		sap = lapd_sap_alloc(teip, sapi);
+	}
+
+	DEBUGP(DMI, "<- %c %s sapi %x tei %3d cmd %x pf %x ns %3d nr %3d "
+	     "ilen %d teip %p vs %d va %d vr %d len %d\n",
+	     lapd_msg_types[typ], lapd_cmd_types[cmd], sapi, tei, command, pf,
+	     ns, nr, *ilen, teip, sap->vs, sap->va, sap->vr, len);
+
+	switch (cmd) {
+	case LAPD_CMD_I:
+		if (ns != sap->vr) {
+			DEBUGP(DMI, "ns %d != vr %d\n", ns, sap->vr);
+			if (ns == ((sap->vr - 1) & 0x7f)) {
+				DEBUGP(DMI, "DOUBLE FRAME, ignoring\n");
+				cmd = 0;	// ignore
+			} else {
+				assert(0);
+			};
+		} else {
+			//printf("IN SEQUENCE\n");
+			sap->vr = (ns + 1) & 0x7f;	// FIXME: hack!
+		};
+
+		break;
+	case LAPD_CMD_UI:
+		break;
+	case LAPD_CMD_SABME:
+		sap->vs = 0;
+		sap->vr = 0;
+		sap->va = 0;
+
+		// ua
+		resp[l++] = data[0];
+		resp[l++] = (tei << 1) | 1;
+		resp[l++] = 0x73;
+		li->transmit_cb(resp, l, li->cbdata);
+		if (teip->state != LAPD_TEI_ACTIVE) {
+			if (teip->state == LAPD_TEI_ASSIGNED) {
+				lapd_tei_set_state(teip,
+						   LAPD_TEI_ACTIVE);
+				//printf("ASSIGNED and ACTIVE\n");
+			} else {
+#if 0
+				DEBUGP(DMI, "rr in strange state, send rej\n");
+
+				// rej
+				resp[l++] = (sap-> sapi << 2) | (li->network_side ? 0 : 2);
+				resp[l++] = (tei << 1) | 1;
+				resp[l++] = 0x09;	//rej
+				resp[l++] = ((sap->vr + 1) << 1) | 0;
+				li->transmit_cb(resp, l, li->cbdata);
+				pf = 0;	// dont reply
+#endif
+			};
+		};
+
+		*prim = LAPD_MPH_ACTIVATE_IND;
+		break;
+	case LAPD_CMD_UA:
+		sap->vs = 0;
+		sap->vr = 0;
+		sap->va = 0;
+		lapd_tei_set_state(teip, LAPD_TEI_ACTIVE);
+		lapd_sap_set_state(teip, sapi, SAP_STATE_ACTIVE);
+		*prim = LAPD_MPH_ACTIVATE_IND;
+		break;
+	case LAPD_CMD_RR:
+		sap->va = (nr & 0x7f);
+#if 0
+		if (teip->state != LAPD_TEI_ACTIVE) {
+			if (teip->state == LAPD_TEI_ASSIGNED) {
+				lapd_tei_set_state(teip, LAPD_TEI_ACTIVE);
+				*prim = LAPD_MPH_ACTIVATE_IND;
+				//printf("ASSIGNED and ACTIVE\n");
+			} else {
+#if 0
+				DEBUGP(DMI, "rr in strange " "state, send rej\n");
+
+				// rej
+				resp[l++] = (sap-> sapi << 2) | (li->network_side ? 0 : 2);
+				resp[l++] = (tei << 1) | 1;
+				resp[l++] = 0x09;	//rej
+				resp[l++] =
+				    ((sap->vr + 1) << 1) | 0;
+				li->transmit_cb(resp, l, li->cbdata);
+				pf = 0;	// dont reply
+#endif
+			};
+		};
+#endif
+		if (pf) {
+			// interrogating us, send rr
+			resp[l++] = data[0];
+			resp[l++] = (tei << 1) | 1;
+			resp[l++] = 0x01;	// rr
+			resp[l++] = (LAPD_NR(sap) << 1) | (data[3] & 1);	// pf bit from req
+
+			li->transmit_cb(resp, l, li->cbdata);
+
+		};
+		break;
+	case LAPD_CMD_FRMR:
+		// frame reject
+#if 0
+		if (teip->state == LAPD_TEI_ACTIVE)
+			*prim = LAPD_MPH_DEACTIVATE_IND;
+		lapd_tei_set_state(teip, LAPD_TEI_ASSIGNED);
+#endif
+		LOGP(DMI, LOGL_NOTICE, "frame reject, ignoring\n");
+		break;
+	case LAPD_CMD_DISC:
+		// disconnect
+		resp[l++] = data[0];
+		resp[l++] = (tei << 1) | 1;
+		resp[l++] = 0x73;
+		li->transmit_cb(resp, l, li->cbdata);
+		lapd_tei_set_state(teip, LAPD_TEI_NONE);
+		break;
+	default:
+		LOGP(DMI, LOGL_NOTICE, "unknown cmd for tei %d (cmd %x)\n",
+		     tei, cmd);
+		break;
+	}
+
+	if (typ == LAPD_TYPE_I) {
+		/* send rr
+		 * Thu Jan 22 19:17:13 2009 <4000> sangoma.c:340 read  (62/25)   4: fa 33 01 0a 
+		 * lapd <- S RR sapi 3e tei  25 cmd 0 pf 0 ns  -1 nr   5 ilen 0 teip 0x613800 vs 7 va 5 vr 2 len 4
+		 */
+
+		/* interrogating us, send rr */
+		DEBUGP(DMI, "Sending RR response\n");
+		resp[l++] = data[0];
+		resp[l++] = (tei << 1) | 1;
+		resp[l++] = 0x01;	// rr
+		resp[l++] = (LAPD_NR(sap) << 1) | (data[3] & 1);	// pf bit from req
+
+		li->transmit_cb(resp, l, li->cbdata);
+
+		if (cmd != 0) {
+			*prim = LAPD_DL_DATA_IND;
+			return contents;
+		}
+	} else if (tei != 127 && typ == LAPD_TYPE_U && cmd == LAPD_CMD_UI) {
+		*prim = LAPD_DL_UNITDATA_IND;
+		return contents;
+	}
+
+	return NULL;
+};
+
+/* low-level function to send a single SABM message */
+static int lapd_send_sabm(struct lapd_instance *li, uint8_t tei, uint8_t sapi)
+{
+	struct msgb *msg = msgb_alloc_headroom(1024, 128, "LAPD SABM");
+	if (!msg)
+		return -ENOMEM;
+
+	DEBUGP(DMI, "Sending SABM for TEI=%u, SAPI=%u\n", tei, sapi);
+
+	msgb_put_u8(msg, (sapi << 2) | (li->network_side ? 2 : 0));
+	msgb_put_u8(msg, (tei << 1) | 1);
+	msgb_put_u8(msg, 0x7F);
+
+	li->transmit_cb(msg->data, msg->len, li->cbdata);
+
+	msgb_free(msg);
+
+	return 0;
+}
+
+/* timer call-back function for SABM re-transmission */
+static void sabme_timer_cb(void *_sap)
+{
+	struct lapd_sap *sap = _sap;
+
+	lapd_send_sabm(sap->tei->li, sap->tei->tei, sap->sapi);
+
+	if (sap->state == SAP_STATE_SABM_RETRANS)
+		bsc_schedule_timer(&sap->sabme_timer, SABM_INTERVAL);
+}
+
+/* Start a (user-side) SAP for the specified TEI/SAPI on the LAPD instance */
+int lapd_sap_start(struct lapd_instance *li, uint8_t tei, uint8_t sapi)
+{
+	struct lapd_sap *sap;
+	struct lapd_tei *teip;
+
+	teip = teip_from_tei(li, tei);
+	if (!teip)
+		teip = lapd_tei_alloc(li, tei);
+
+	sap = lapd_sap_find(teip, sapi);
+	if (sap)
+		return -EEXIST;
+
+	sap = lapd_sap_alloc(teip, sapi);
+
+	lapd_sap_set_state(teip, sapi, SAP_STATE_SABM_RETRANS);
+
+	return 0;
+}
+
+/* Stop a (user-side) SAP for the specified TEI/SAPI on the LAPD instance */
+int lapd_sap_stop(struct lapd_instance *li, uint8_t tei, uint8_t sapi)
+{
+	struct lapd_tei *teip;
+	struct lapd_sap *sap;
+
+	teip = teip_from_tei(li, tei);
+	if (!teip)
+		return -ENODEV;
+
+	sap = lapd_sap_find(teip, sapi);
+	if (!sap)
+		return -ENODEV;
+
+	lapd_sap_set_state(teip, sapi, SAP_STATE_INACTIVE);
+
+	llist_del(&sap->list);
+	talloc_free(sap);
+
+	return 0;
+}
+
+/* Transmit Data (I-Frame) on the given LAPD Instance / TEI / SAPI */
+void lapd_transmit(struct lapd_instance *li, uint8_t tei, uint8_t sapi,
+		   uint8_t *data, unsigned int len)
+{
+	struct lapd_tei *teip = teip_from_tei(li, tei);
+	struct lapd_sap *sap;
+
+	if (!teip) {
+		LOGP(DMI, LOGL_ERROR, "Cannot transmit on non-existing "
+		     "TEI %u\n", tei);
+		return;
+	}
+
+	sap = lapd_sap_find(teip, sapi);
+	if (!sap) {
+		LOGP(DMI, LOGL_INFO, "Tx on unknown SAPI=%u in TEI=%u, "
+			"allocating\n", sapi, tei);
+		sap = lapd_sap_alloc(teip, sapi);
+	}
+
+	/* prepend stuff */
+	uint8_t buf[10000];
+	memset(buf, 0, sizeof(buf));
+	memmove(buf + 4, data, len);
+	len += 4;
+
+	buf[0] = (sapi << 2) | (li->network_side ? 2 : 0);
+	buf[1] = (tei << 1) | 1;
+	buf[2] = (LAPD_NS(sap) << 1);
+	buf[3] = (LAPD_NR(sap) << 1) | 0;
+
+	sap->vs = (sap->vs + 1) & 0x7f;
+
+	li->transmit_cb(buf, len, li->cbdata);
+};
+
+/* Allocate a new LAPD instance */
+struct lapd_instance *lapd_instance_alloc(int network_side,
+					  void (*tx_cb)(uint8_t *data, int len,
+							void *cbdata), void *cbdata)
+{
+	struct lapd_instance *li;
+
+	li = talloc_zero(NULL, struct lapd_instance);
+	if (!li)
+		return NULL;
+
+	li->transmit_cb = tx_cb;
+	li->cbdata = cbdata;
+	li->network_side = network_side;
+	INIT_LLIST_HEAD(&li->tei_list);
+
+	return li;
+}
diff --git a/src/libabis/input/lapd.h b/src/libabis/input/lapd.h
new file mode 100644
index 000000000..fd11edaa3
--- /dev/null
+++ b/src/libabis/input/lapd.h
@@ -0,0 +1,46 @@
+#ifndef OPENBSC_LAPD_H
+#define OPENBSC_LAPD_H
+
+#include <stdint.h>
+
+#include <osmocore/linuxlist.h>
+
+typedef enum {
+	LAPD_MPH_NONE	= 0,
+
+	LAPD_MPH_ACTIVATE_IND,
+	LAPD_MPH_DEACTIVATE_IND,
+
+	LAPD_DL_DATA_IND,
+	LAPD_DL_UNITDATA_IND,
+
+} lapd_mph_type;
+
+struct lapd_instance {
+	struct llist_head list;		/* list of LAPD instances */
+	int network_side;
+
+	void (*transmit_cb)(uint8_t *data, int len, void *cbdata);
+	void *cbdata;
+
+	struct llist_head tei_list;	/* list of TEI in this LAPD instance */
+};
+
+extern uint8_t *lapd_receive(struct lapd_instance *li, uint8_t *data, unsigned int len,
+			     int *ilen, lapd_mph_type *prim);
+
+extern void lapd_transmit(struct lapd_instance *li, uint8_t tei, uint8_t sapi,
+			  uint8_t *data, unsigned int len);
+
+struct lapd_instance *lapd_instance_alloc(int network_side,
+					  void (*tx_cb)(uint8_t *data, int len,
+							void *cbdata), void *cbdata);
+
+
+/* Start a (user-side) SAP for the specified TEI/SAPI on the LAPD instance */
+int lapd_sap_start(struct lapd_instance *li, uint8_t tei, uint8_t sapi);
+
+/* Stop a (user-side) SAP for the specified TEI/SAPI on the LAPD instance */
+int lapd_sap_stop(struct lapd_instance *li, uint8_t tei, uint8_t sapi);
+
+#endif /* OPENBSC_LAPD_H */
diff --git a/src/libabis/input/misdn.c b/src/libabis/input/misdn.c
new file mode 100644
index 000000000..459887917
--- /dev/null
+++ b/src/libabis/input/misdn.c
@@ -0,0 +1,542 @@
+/* OpenBSC Abis input driver for mISDNuser */
+
+/* (C) 2008-2009 by Harald Welte <laforge@gnumonks.org>
+ * (C) 2009 by Holger Hans Peter Freyther <zecke@selfish.org>
+ *
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <string.h>
+#include <time.h>
+#include <sys/fcntl.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+#include <arpa/inet.h>
+#include <mISDNif.h>
+
+//#define AF_COMPATIBILITY_FUNC
+//#include <compat_af_isdn.h>
+#ifndef AF_ISDN
+#define AF_ISDN 34
+#define PF_ISDN AF_ISDN
+#endif
+
+#include <osmocore/select.h>
+#include <osmocore/msgb.h>
+#include <osmocore/talloc.h>
+#include <openbsc/debug.h>
+#include <openbsc/gsm_data.h>
+#include <openbsc/abis_nm.h>
+#include <openbsc/abis_rsl.h>
+#include <openbsc/subchan_demux.h>
+#include <openbsc/e1_input.h>
+#include <openbsc/signal.h>
+
+#define TS1_ALLOC_SIZE	300
+
+struct prim_name {
+	unsigned int prim;
+	const char *name;
+};
+
+const struct prim_name prim_names[] = {
+	{ PH_CONTROL_IND, "PH_CONTROL_IND" },
+	{ PH_DATA_IND, "PH_DATA_IND" },
+	{ PH_DATA_CNF, "PH_DATA_CNF" },
+	{ PH_ACTIVATE_IND, "PH_ACTIVATE_IND" },
+	{ DL_ESTABLISH_IND, "DL_ESTABLISH_IND" },
+	{ DL_ESTABLISH_CNF, "DL_ESTABLISH_CNF" },
+	{ DL_RELEASE_IND, "DL_RELEASE_IND" },
+	{ DL_RELEASE_CNF, "DL_RELEASE_CNF" },
+	{ DL_DATA_IND, "DL_DATA_IND" },
+	{ DL_UNITDATA_IND, "DL_UNITDATA_IND" },
+	{ DL_INFORMATION_IND, "DL_INFORMATION_IND" },
+	{ MPH_ACTIVATE_IND, "MPH_ACTIVATE_IND" },
+	{ MPH_DEACTIVATE_IND, "MPH_DEACTIVATE_IND" },
+};
+
+const char *get_prim_name(unsigned int prim)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(prim_names); i++) {
+		if (prim_names[i].prim == prim)
+			return prim_names[i].name;
+	}
+
+	return "UNKNOWN";
+}
+
+static int handle_ts1_read(struct bsc_fd *bfd)
+{
+	struct e1inp_line *line = bfd->data;
+	unsigned int ts_nr = bfd->priv_nr;
+	struct e1inp_ts *e1i_ts = &line->ts[ts_nr-1];
+	struct e1inp_sign_link *link;
+	struct msgb *msg = msgb_alloc(TS1_ALLOC_SIZE, "mISDN TS1");
+	struct sockaddr_mISDN l2addr;
+	struct mISDNhead *hh;
+	socklen_t alen;
+	int ret;
+
+	if (!msg)
+		return -ENOMEM;
+
+	hh = (struct mISDNhead *) msg->data;
+
+	alen = sizeof(l2addr);
+	ret = recvfrom(bfd->fd, msg->data, 300, 0,
+		       (struct sockaddr *) &l2addr, &alen);
+	if (ret < 0) {
+		fprintf(stderr, "recvfrom error  %s\n", strerror(errno));
+		return ret;
+	}
+
+	if (alen != sizeof(l2addr)) {
+		fprintf(stderr, "%s error len\n", __func__);
+		return -EINVAL;
+	}
+
+	msgb_put(msg, ret);
+
+	DEBUGP(DMI, "alen =%d, dev(%d) channel(%d) sapi(%d) tei(%d)\n",
+		alen, l2addr.dev, l2addr.channel, l2addr.sapi, l2addr.tei);
+
+	DEBUGP(DMI, "<= len = %d, prim(0x%x) id(0x%x): %s\n",
+		ret, hh->prim, hh->id, get_prim_name(hh->prim));
+
+	switch (hh->prim) {
+	case DL_INFORMATION_IND:
+		/* mISDN tells us which channel number is allocated for this
+		 * tuple of (SAPI, TEI). */
+		DEBUGP(DMI, "DL_INFORMATION_IND: use channel(%d) sapi(%d) tei(%d) for now\n",
+			l2addr.channel, l2addr.sapi, l2addr.tei);
+		link = e1inp_lookup_sign_link(e1i_ts, l2addr.tei, l2addr.sapi);
+		if (!link) {
+			DEBUGPC(DMI, "mISDN message for unknown sign_link\n");
+			msgb_free(msg);
+			return -EINVAL;
+		}
+		/* save the channel number in the driver private struct */
+		link->driver.misdn.channel = l2addr.channel;
+		break;
+	case DL_ESTABLISH_IND:
+		DEBUGP(DMI, "DL_ESTABLISH_IND: channel(%d) sapi(%d) tei(%d)\n",
+			l2addr.channel, l2addr.sapi, l2addr.tei);
+		/* For some strange reason, sometimes the DL_INFORMATION_IND tells
+		 * us the wrong channel, and we only get the real channel number
+		 * during the DL_ESTABLISH_IND */
+		link = e1inp_lookup_sign_link(e1i_ts, l2addr.tei, l2addr.sapi);
+		if (!link) {
+			DEBUGPC(DMI, "mISDN message for unknown sign_link\n");
+			msgb_free(msg);
+			return -EINVAL;
+		}
+		/* save the channel number in the driver private struct */
+		link->driver.misdn.channel = l2addr.channel;
+		ret = e1inp_event(e1i_ts, S_INP_TEI_UP, l2addr.tei, l2addr.sapi);
+		break;
+	case DL_RELEASE_IND:
+		DEBUGP(DMI, "DL_RELEASE_IND: channel(%d) sapi(%d) tei(%d)\n",
+		l2addr.channel, l2addr.sapi, l2addr.tei);
+		ret = e1inp_event(e1i_ts, S_INP_TEI_DN, l2addr.tei, l2addr.sapi);
+		break;
+	case DL_DATA_IND:
+	case DL_UNITDATA_IND:
+		msg->l2h = msg->data + MISDN_HEADER_LEN;
+		DEBUGP(DMI, "RX: %s\n", hexdump(msgb_l2(msg), ret - MISDN_HEADER_LEN));
+		ret = e1inp_rx_ts(e1i_ts, msg, l2addr.tei, l2addr.sapi);
+		break;
+	case PH_ACTIVATE_IND:
+		DEBUGP(DMI, "PH_ACTIVATE_IND: channel(%d) sapi(%d) tei(%d)\n",
+		l2addr.channel, l2addr.sapi, l2addr.tei);
+		break;
+	case PH_DEACTIVATE_IND:
+		DEBUGP(DMI, "PH_DEACTIVATE_IND: channel(%d) sapi(%d) tei(%d)\n",
+		l2addr.channel, l2addr.sapi, l2addr.tei);
+		break;
+	default:
+		break;
+	}
+	return ret;
+}
+
+static int ts_want_write(struct e1inp_ts *e1i_ts)
+{
+	/* We never include the mISDN B-Channel FD into the
+	 * writeset, since it doesn't support poll() based
+	 * write flow control */		
+	if (e1i_ts->type == E1INP_TS_TYPE_TRAU)
+		return 0;
+
+	e1i_ts->driver.misdn.fd.when |= BSC_FD_WRITE;
+
+	return 0;
+}
+
+static void timeout_ts1_write(void *data)
+{
+	struct e1inp_ts *e1i_ts = (struct e1inp_ts *)data;
+
+	/* trigger write of ts1, due to tx delay timer */
+	ts_want_write(e1i_ts);
+}
+
+static int handle_ts1_write(struct bsc_fd *bfd)
+{
+	struct e1inp_line *line = bfd->data;
+	unsigned int ts_nr = bfd->priv_nr;
+	struct e1inp_ts *e1i_ts = &line->ts[ts_nr-1];
+	struct e1inp_sign_link *sign_link;
+	struct sockaddr_mISDN sa;
+	struct msgb *msg;
+	struct mISDNhead *hh;
+	u_int8_t *l2_data;
+	int ret;
+
+	bfd->when &= ~BSC_FD_WRITE;
+
+	/* get the next msg for this timeslot */
+	msg = e1inp_tx_ts(e1i_ts, &sign_link);
+	if (!msg) {
+		/* no message after tx delay timer */
+		return 0;
+	}
+
+	l2_data = msg->data;
+
+	/* prepend the mISDNhead */
+	hh = (struct mISDNhead *) msgb_push(msg, sizeof(*hh));
+	hh->prim = DL_DATA_REQ;
+
+	DEBUGP(DMI, "TX channel(%d) TEI(%d) SAPI(%d): %s\n",
+		sign_link->driver.misdn.channel, sign_link->tei,
+		sign_link->sapi, hexdump(l2_data, msg->len - MISDN_HEADER_LEN));
+
+	/* construct the sockaddr */
+	sa.family = AF_ISDN;
+	sa.sapi = sign_link->sapi;
+	sa.dev = sign_link->tei;
+	sa.channel = sign_link->driver.misdn.channel;
+
+	ret = sendto(bfd->fd, msg->data, msg->len, 0,
+		     (struct sockaddr *)&sa, sizeof(sa));
+	if (ret < 0)
+		fprintf(stderr, "%s sendto failed %d\n", __func__, ret);
+	msgb_free(msg);
+
+	/* set tx delay timer for next event */
+	e1i_ts->sign.tx_timer.cb = timeout_ts1_write;
+	e1i_ts->sign.tx_timer.data = e1i_ts;
+	bsc_schedule_timer(&e1i_ts->sign.tx_timer, 0, e1i_ts->sign.delay);
+
+	return ret;
+}
+
+#define BCHAN_TX_GRAN	160
+/* write to a B channel TS */
+static int handle_tsX_write(struct bsc_fd *bfd)
+{
+	struct e1inp_line *line = bfd->data;
+	unsigned int ts_nr = bfd->priv_nr;
+	struct e1inp_ts *e1i_ts = &line->ts[ts_nr-1];
+	struct mISDNhead *hh;
+	u_int8_t tx_buf[BCHAN_TX_GRAN + sizeof(*hh)];
+	struct subch_mux *mx = &e1i_ts->trau.mux;
+	int ret;
+
+	hh = (struct mISDNhead *) tx_buf;
+	hh->prim = PH_DATA_REQ;
+
+	subchan_mux_out(mx, tx_buf+sizeof(*hh), BCHAN_TX_GRAN);
+
+	DEBUGP(DMIB, "BCHAN TX: %s\n",
+		hexdump(tx_buf+sizeof(*hh), BCHAN_TX_GRAN));
+
+	ret = send(bfd->fd, tx_buf, sizeof(*hh) + BCHAN_TX_GRAN, 0);
+	if (ret < sizeof(*hh) + BCHAN_TX_GRAN)
+		DEBUGP(DMIB, "send returns %d instead of %zu\n", ret,
+			sizeof(*hh) + BCHAN_TX_GRAN);
+
+	return ret;
+}
+
+#define TSX_ALLOC_SIZE 4096
+/* FIXME: read from a B channel TS */
+static int handle_tsX_read(struct bsc_fd *bfd)
+{
+	struct e1inp_line *line = bfd->data;
+	unsigned int ts_nr = bfd->priv_nr;
+	struct e1inp_ts *e1i_ts = &line->ts[ts_nr-1];
+	struct msgb *msg = msgb_alloc(TSX_ALLOC_SIZE, "mISDN TSx");
+	struct mISDNhead *hh;
+	int ret;
+
+	if (!msg)
+		return -ENOMEM;
+
+	hh = (struct mISDNhead *) msg->data;
+
+	ret = recv(bfd->fd, msg->data, TSX_ALLOC_SIZE, 0);
+	if (ret < 0) {
+		fprintf(stderr, "recvfrom error  %s\n", strerror(errno));
+		return ret;
+	}
+
+	msgb_put(msg, ret);
+
+	if (hh->prim != PH_CONTROL_IND)
+		DEBUGP(DMIB, "<= BCHAN len = %d, prim(0x%x) id(0x%x): %s\n",
+			ret, hh->prim, hh->id, get_prim_name(hh->prim));
+
+	switch (hh->prim) {
+	case PH_DATA_IND:
+		msg->l2h = msg->data + MISDN_HEADER_LEN;
+		DEBUGP(DMIB, "BCHAN RX: %s\n",
+			hexdump(msgb_l2(msg), ret - MISDN_HEADER_LEN));
+		ret = e1inp_rx_ts(e1i_ts, msg, 0, 0);
+		break;
+	case PH_ACTIVATE_IND:
+	case PH_DATA_CNF:
+		/* physical layer indicates that data has been sent,
+		 * we thus can send some more data */
+		ret = handle_tsX_write(bfd);
+	default:
+		break;
+	}
+	/* FIXME: why do we free signalling msgs in the caller, and trau not? */
+	msgb_free(msg);
+
+	return ret;
+}
+
+/* callback from select.c in case one of the fd's can be read/written */
+static int misdn_fd_cb(struct bsc_fd *bfd, unsigned int what)
+{
+	struct e1inp_line *line = bfd->data;
+	unsigned int ts_nr = bfd->priv_nr;
+	unsigned int idx = ts_nr-1;
+	struct e1inp_ts *e1i_ts = &line->ts[idx];
+	int rc = 0;
+
+	switch (e1i_ts->type) {
+	case E1INP_TS_TYPE_SIGN:
+		if (what & BSC_FD_READ)
+			rc = handle_ts1_read(bfd);
+		if (what & BSC_FD_WRITE)
+			rc = handle_ts1_write(bfd);
+		break;
+	case E1INP_TS_TYPE_TRAU:
+		if (what & BSC_FD_READ)
+			rc = handle_tsX_read(bfd);
+		/* We never include the mISDN B-Channel FD into the
+		 * writeset, since it doesn't support poll() based
+		 * write flow control */		
+		break;
+	default:
+		fprintf(stderr, "unknown E1 TS type %u\n", e1i_ts->type);
+		break;
+	}
+
+	return rc;
+}
+
+static int activate_bchan(struct e1inp_line *line, int ts, int act)
+{
+	struct mISDNhead hh;
+	int ret;
+	unsigned int idx = ts-1;
+	struct e1inp_ts *e1i_ts = &line->ts[idx];
+	struct bsc_fd *bfd = &e1i_ts->driver.misdn.fd;
+
+	fprintf(stdout, "activate bchan\n");
+	if (act)
+		hh.prim = PH_ACTIVATE_REQ;
+	else
+		hh.prim = PH_DEACTIVATE_REQ;
+
+	hh.id = MISDN_ID_ANY;
+	ret = sendto(bfd->fd, &hh, sizeof(hh), 0, NULL, 0);
+	if (ret < 0) {
+		fprintf(stdout, "could not send ACTIVATE_RQ %s\n",
+			strerror(errno));
+	}
+
+	return ret;
+}
+
+static int mi_e1_line_update(struct e1inp_line *line);
+
+struct e1inp_driver misdn_driver = {
+	.name = "misdn",
+	.want_write = ts_want_write,
+	.default_delay = 50000,
+	.line_update = &mi_e1_line_update,
+};
+
+static int mi_e1_setup(struct e1inp_line *line, int release_l2)
+{
+	int ts, ret;
+
+	/* TS0 is CRC4, don't need any fd for it */
+	for (ts = 1; ts < NUM_E1_TS; ts++) {
+		unsigned int idx = ts-1;
+		struct e1inp_ts *e1i_ts = &line->ts[idx];
+		struct bsc_fd *bfd = &e1i_ts->driver.misdn.fd;
+		struct sockaddr_mISDN addr;
+
+		bfd->data = line;
+		bfd->priv_nr = ts;
+		bfd->cb = misdn_fd_cb;
+
+		switch (e1i_ts->type) {
+		case E1INP_TS_TYPE_NONE:
+			continue;
+			break;
+		case E1INP_TS_TYPE_SIGN:
+			bfd->fd = socket(PF_ISDN, SOCK_DGRAM, ISDN_P_LAPD_NT);
+			bfd->when = BSC_FD_READ;
+			break;
+		case E1INP_TS_TYPE_TRAU:
+			bfd->fd = socket(PF_ISDN, SOCK_DGRAM, ISDN_P_B_RAW);
+			/* We never include the mISDN B-Channel FD into the
+	 		* writeset, since it doesn't support poll() based
+	 		* write flow control */		
+			bfd->when = BSC_FD_READ;
+			break;
+		}
+
+		if (bfd->fd < 0) {
+			fprintf(stderr, "%s could not open socket %s\n",
+				__func__, strerror(errno));
+			return bfd->fd;
+		}
+
+		memset(&addr, 0, sizeof(addr));
+		addr.family = AF_ISDN;
+		addr.dev = line->num;
+		switch (e1i_ts->type) {
+		case E1INP_TS_TYPE_SIGN:
+			addr.channel = 0;
+			/* SAPI not supported yet in kernel */
+			//addr.sapi = e1inp_ts->sign.sapi;
+			addr.sapi = 0;
+			addr.tei = GROUP_TEI;
+			break;
+		case E1INP_TS_TYPE_TRAU:
+			addr.channel = ts;
+			break;
+		default:
+			DEBUGP(DMI, "unsupported E1 TS type: %u\n",
+				e1i_ts->type);
+			break;
+		}
+
+		ret = bind(bfd->fd, (struct sockaddr *) &addr, sizeof(addr));
+		if (ret < 0) {
+			fprintf(stderr, "could not bind l2 socket %s\n",
+				strerror(errno));
+			return -EIO;
+		}
+
+		if (e1i_ts->type == E1INP_TS_TYPE_SIGN) {
+			ret = ioctl(bfd->fd, IMCLEAR_L2, &release_l2);
+			if (ret < 0) {
+				fprintf(stderr, "could not send IOCTL IMCLEAN_L2 %s\n", strerror(errno));
+				return -EIO;
+			}
+		}
+
+		/* FIXME: only activate B-Channels once we start to
+		 * use them to conserve CPU power */
+		if (e1i_ts->type == E1INP_TS_TYPE_TRAU)
+			activate_bchan(line, ts, 1);
+
+		ret = bsc_register_fd(bfd);
+		if (ret < 0) {
+			fprintf(stderr, "could not register FD: %s\n",
+				strerror(ret));
+			return ret;
+		}
+	}
+
+	return 0;
+}
+
+static int mi_e1_line_update(struct e1inp_line *line)
+{
+	struct mISDN_devinfo devinfo;
+	int sk, ret, cnt;
+
+	if (line->driver != &misdn_driver)
+		return -EINVAL;
+
+	/* open the ISDN card device */
+	sk = socket(PF_ISDN, SOCK_RAW, ISDN_P_BASE);
+	if (sk < 0) {
+		fprintf(stderr, "%s could not open socket %s\n",
+			__func__, strerror(errno));
+		return sk;
+	}
+
+	ret = ioctl(sk, IMGETCOUNT, &cnt);
+	if (ret) {
+		fprintf(stderr, "%s error getting interf count: %s\n",
+			__func__, strerror(errno));
+		close(sk);
+		return -ENODEV;
+	}
+	//DEBUGP(DMI,"%d device%s found\n", cnt, (cnt==1)?"":"s");
+	printf("%d device%s found\n", cnt, (cnt==1)?"":"s");
+#if 1
+	devinfo.id = line->num;
+	ret = ioctl(sk, IMGETDEVINFO, &devinfo);
+	if (ret < 0) {
+		fprintf(stdout, "error getting info for device %d: %s\n",
+			line->num, strerror(errno));
+		return -ENODEV;
+	}
+	fprintf(stdout, "        id:             %d\n", devinfo.id);
+	fprintf(stdout, "        Dprotocols:     %08x\n", devinfo.Dprotocols);
+	fprintf(stdout, "        Bprotocols:     %08x\n", devinfo.Bprotocols);
+	fprintf(stdout, "        protocol:       %d\n", devinfo.protocol);
+	fprintf(stdout, "        nrbchan:        %d\n", devinfo.nrbchan);
+	fprintf(stdout, "        name:           %s\n", devinfo.name);
+#endif
+
+	if (!(devinfo.Dprotocols & (1 << ISDN_P_NT_E1))) {
+		fprintf(stderr, "error: card is not of type E1 (NT-mode)\n");
+		return -EINVAL;
+	}
+
+	ret = mi_e1_setup(line, 1);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+void e1inp_misdn_init(void)
+{
+	/* register the driver with the core */
+	e1inp_driver_register(&misdn_driver);
+}
diff --git a/src/libbsc/Makefile.am b/src/libbsc/Makefile.am
new file mode 100644
index 000000000..de7692950
--- /dev/null
+++ b/src/libbsc/Makefile.am
@@ -0,0 +1,25 @@
+INCLUDES = $(all_includes) -I$(top_srcdir)/include -I$(top_builddir)
+AM_CFLAGS=-Wall $(LIBOSMOCORE_CFLAGS) $(LIBOSMOVTY_CFLAGS) $(COVERAGE_CFLAGS)
+AM_LDFLAGS = $(LIBOSMOCORE_LIBS) $(COVERAGE_LDFLAGS)
+
+noinst_LIBRARIES = libbsc.a
+
+libbsc_a_SOURCES =	abis_nm.c abis_nm_vty.c \
+			abis_om2000.c abis_om2000_vty.c \
+			abis_rsl.c bsc_rll.c \
+			paging.c \
+			bts_ericsson_rbs2000.c \
+			bts_ipaccess_nanobts.c \
+			bts_siemens_bs11.c \
+			bts_hsl_femtocell.c \
+			bts_unknown.c \
+			chan_alloc.c \
+			gsm_subscriber_base.c \
+			handover_decision.c handover_logic.c meas_rep.c \
+			rest_octets.c system_information.c \
+			e1_config.c \
+			transaction.c \
+			bsc_api.c bsc_msc.c bsc_vty.c \
+			gsm_04_08_utils.c \
+			bsc_init.c
+
diff --git a/src/libbsc/Makefile.in b/src/libbsc/Makefile.in
new file mode 100644
index 000000000..e5d3d2018
--- /dev/null
+++ b/src/libbsc/Makefile.in
@@ -0,0 +1,504 @@
+# Makefile.in generated by automake 1.11.1 from Makefile.am.
+# @configure_input@
+
+# Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
+# 2003, 2004, 2005, 2006, 2007, 2008, 2009  Free Software Foundation,
+# Inc.
+# This Makefile.in is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
+# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+# PARTICULAR PURPOSE.
+
+@SET_MAKE@
+
+VPATH = @srcdir@
+pkgdatadir = $(datadir)/@PACKAGE@
+pkgincludedir = $(includedir)/@PACKAGE@
+pkglibdir = $(libdir)/@PACKAGE@
+pkglibexecdir = $(libexecdir)/@PACKAGE@
+am__cd = CDPATH="$${ZSH_VERSION+.}$(PATH_SEPARATOR)" && cd
+install_sh_DATA = $(install_sh) -c -m 644
+install_sh_PROGRAM = $(install_sh) -c
+install_sh_SCRIPT = $(install_sh) -c
+INSTALL_HEADER = $(INSTALL_DATA)
+transform = $(program_transform_name)
+NORMAL_INSTALL = :
+PRE_INSTALL = :
+POST_INSTALL = :
+NORMAL_UNINSTALL = :
+PRE_UNINSTALL = :
+POST_UNINSTALL = :
+subdir = src/libbsc
+DIST_COMMON = $(srcdir)/Makefile.am $(srcdir)/Makefile.in
+ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
+am__aclocal_m4_deps = $(top_srcdir)/configure.in
+am__configure_deps = $(am__aclocal_m4_deps) $(CONFIGURE_DEPENDENCIES) \
+	$(ACLOCAL_M4)
+mkinstalldirs = $(install_sh) -d
+CONFIG_HEADER = $(top_builddir)/bscconfig.h
+CONFIG_CLEAN_FILES =
+CONFIG_CLEAN_VPATH_FILES =
+LIBRARIES = $(noinst_LIBRARIES)
+AR = ar
+ARFLAGS = cru
+AM_V_AR = $(am__v_AR_$(V))
+am__v_AR_ = $(am__v_AR_$(AM_DEFAULT_VERBOSITY))
+am__v_AR_0 = @echo "  AR    " $@;
+AM_V_at = $(am__v_at_$(V))
+am__v_at_ = $(am__v_at_$(AM_DEFAULT_VERBOSITY))
+am__v_at_0 = @
+libbsc_a_AR = $(AR) $(ARFLAGS)
+libbsc_a_LIBADD =
+am_libbsc_a_OBJECTS = abis_nm.$(OBJEXT) abis_nm_vty.$(OBJEXT) \
+	abis_om2000.$(OBJEXT) abis_om2000_vty.$(OBJEXT) \
+	abis_rsl.$(OBJEXT) bsc_rll.$(OBJEXT) paging.$(OBJEXT) \
+	bts_ericsson_rbs2000.$(OBJEXT) bts_ipaccess_nanobts.$(OBJEXT) \
+	bts_siemens_bs11.$(OBJEXT) bts_hsl_femtocell.$(OBJEXT) \
+	bts_unknown.$(OBJEXT) chan_alloc.$(OBJEXT) \
+	gsm_subscriber_base.$(OBJEXT) handover_decision.$(OBJEXT) \
+	handover_logic.$(OBJEXT) meas_rep.$(OBJEXT) \
+	rest_octets.$(OBJEXT) system_information.$(OBJEXT) \
+	e1_config.$(OBJEXT) transaction.$(OBJEXT) bsc_api.$(OBJEXT) \
+	bsc_msc.$(OBJEXT) bsc_vty.$(OBJEXT) gsm_04_08_utils.$(OBJEXT) \
+	bsc_init.$(OBJEXT)
+libbsc_a_OBJECTS = $(am_libbsc_a_OBJECTS)
+DEFAULT_INCLUDES = -I.@am__isrc@ -I$(top_builddir)
+depcomp = $(SHELL) $(top_srcdir)/depcomp
+am__depfiles_maybe = depfiles
+am__mv = mv -f
+COMPILE = $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) \
+	$(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS)
+AM_V_CC = $(am__v_CC_$(V))
+am__v_CC_ = $(am__v_CC_$(AM_DEFAULT_VERBOSITY))
+am__v_CC_0 = @echo "  CC    " $@;
+CCLD = $(CC)
+LINK = $(CCLD) $(AM_CFLAGS) $(CFLAGS) $(AM_LDFLAGS) $(LDFLAGS) -o $@
+AM_V_CCLD = $(am__v_CCLD_$(V))
+am__v_CCLD_ = $(am__v_CCLD_$(AM_DEFAULT_VERBOSITY))
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+			paging.c \
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+			bts_hsl_femtocell.c \
+			bts_unknown.c \
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+			transaction.c \
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+	  done | \
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+	mkid -fID $$unique
+tags: TAGS
+
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+	here=`pwd`; \
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+	    if test -f "$$i"; then echo $$i; else echo $(srcdir)/$$i; fi; \
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+	      $$unique; \
+	  fi; \
+	fi
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+		$(TAGS_FILES) $(LISP)
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+	unique=`for i in $$list; do \
+	    if test -f "$$i"; then echo $$i; else echo $(srcdir)/$$i; fi; \
+	  done | \
+	  $(AWK) '{ files[$$0] = 1; nonempty = 1; } \
+	      END { if (nonempty) { for (i in files) print i; }; }'`; \
+	test -z "$(CTAGS_ARGS)$$unique" \
+	  || $(CTAGS) $(CTAGSFLAGS) $(AM_CTAGSFLAGS) $(CTAGS_ARGS) \
+	     $$unique
+
+GTAGS:
+	here=`$(am__cd) $(top_builddir) && pwd` \
+	  && $(am__cd) $(top_srcdir) \
+	  && gtags -i $(GTAGS_ARGS) "$$here"
+
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+	-rm -f TAGS ID GTAGS GRTAGS GSYMS GPATH tags
+
+distdir: $(DISTFILES)
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+	list='$(DISTFILES)'; \
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+	  */*) $(MKDIR_P) `echo "$$dist_files" | \
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+	  if test -f $$file || test -d $$file; then d=.; else d=$(srcdir); fi; \
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+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
+	    cp -fpR $$d/$$file "$(distdir)$$dir" || exit 1; \
+	  else \
+	    test -f "$(distdir)/$$file" \
+	    || cp -p $$d/$$file "$(distdir)/$$file" \
+	    || exit 1; \
+	  fi; \
+	done
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+	  install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	  `test -z '$(STRIP)' || \
+	    echo "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'"` install
+mostlyclean-generic:
+
+clean-generic:
+
+distclean-generic:
+	-test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
+	-test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
+
+maintainer-clean-generic:
+	@echo "This command is intended for maintainers to use"
+	@echo "it deletes files that may require special tools to rebuild."
+clean: clean-am
+
+clean-am: clean-generic clean-noinstLIBRARIES mostlyclean-am
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+distclean: distclean-am
+	-rm -rf ./$(DEPDIR)
+	-rm -f Makefile
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+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/src/libbsc/abis_nm.c b/src/libbsc/abis_nm.c
new file mode 100644
index 000000000..0e7fc8d8c
--- /dev/null
+++ b/src/libbsc/abis_nm.c
@@ -0,0 +1,3132 @@
+/* GSM Network Management (OML) messages on the A-bis interface
+ * 3GPP TS 12.21 version 8.0.0 Release 1999 / ETSI TS 100 623 V8.0.0 */
+
+/* (C) 2008-2009 by Harald Welte <laforge@gnumonks.org>
+ *
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+
+#include <errno.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <libgen.h>
+#include <time.h>
+#include <limits.h>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+#include <openbsc/gsm_data.h>
+#include <openbsc/debug.h>
+#include <osmocore/msgb.h>
+#include <osmocore/tlv.h>
+#include <osmocore/talloc.h>
+#include <openbsc/abis_nm.h>
+#include <openbsc/misdn.h>
+#include <openbsc/signal.h>
+
+#define OM_ALLOC_SIZE		1024
+#define OM_HEADROOM_SIZE	128
+#define IPACC_SEGMENT_SIZE	245
+
+/* unidirectional messages from BTS to BSC */
+static const enum abis_nm_msgtype reports[] = {
+	NM_MT_SW_ACTIVATED_REP,
+	NM_MT_TEST_REP,
+	NM_MT_STATECHG_EVENT_REP,
+	NM_MT_FAILURE_EVENT_REP,
+};
+
+/* messages without ACK/NACK */
+static const enum abis_nm_msgtype no_ack_nack[] = {
+	NM_MT_MEAS_RES_REQ,
+	NM_MT_STOP_MEAS,
+	NM_MT_START_MEAS,
+};
+
+/* Messages related to software load */
+static const enum abis_nm_msgtype sw_load_msgs[] = {
+	NM_MT_LOAD_INIT_ACK,
+	NM_MT_LOAD_INIT_NACK,
+	NM_MT_LOAD_SEG_ACK,
+	NM_MT_LOAD_ABORT,
+	NM_MT_LOAD_END_ACK,
+	NM_MT_LOAD_END_NACK,
+	//NM_MT_SW_ACT_REQ,
+	NM_MT_ACTIVATE_SW_ACK,
+	NM_MT_ACTIVATE_SW_NACK,
+	NM_MT_SW_ACTIVATED_REP,
+};
+
+static const enum abis_nm_msgtype nacks[] = {
+	NM_MT_LOAD_INIT_NACK,
+	NM_MT_LOAD_END_NACK,
+	NM_MT_SW_ACT_REQ_NACK,
+	NM_MT_ACTIVATE_SW_NACK,
+	NM_MT_ESTABLISH_TEI_NACK,
+	NM_MT_CONN_TERR_SIGN_NACK,
+	NM_MT_DISC_TERR_SIGN_NACK,
+	NM_MT_CONN_TERR_TRAF_NACK,
+	NM_MT_DISC_TERR_TRAF_NACK,
+	NM_MT_CONN_MDROP_LINK_NACK,
+	NM_MT_DISC_MDROP_LINK_NACK,
+	NM_MT_SET_BTS_ATTR_NACK,
+	NM_MT_SET_RADIO_ATTR_NACK,
+	NM_MT_SET_CHAN_ATTR_NACK,
+	NM_MT_PERF_TEST_NACK,
+	NM_MT_SEND_TEST_REP_NACK,
+	NM_MT_STOP_TEST_NACK,
+	NM_MT_STOP_EVENT_REP_NACK,
+	NM_MT_REST_EVENT_REP_NACK,
+	NM_MT_CHG_ADM_STATE_NACK,
+	NM_MT_CHG_ADM_STATE_REQ_NACK,
+	NM_MT_REP_OUTST_ALARMS_NACK,
+	NM_MT_CHANGEOVER_NACK,
+	NM_MT_OPSTART_NACK,
+	NM_MT_REINIT_NACK,
+	NM_MT_SET_SITE_OUT_NACK,
+	NM_MT_CHG_HW_CONF_NACK,
+	NM_MT_GET_ATTR_NACK,
+	NM_MT_SET_ALARM_THRES_NACK,
+	NM_MT_BS11_BEGIN_DB_TX_NACK,
+	NM_MT_BS11_END_DB_TX_NACK,
+	NM_MT_BS11_CREATE_OBJ_NACK,
+	NM_MT_BS11_DELETE_OBJ_NACK,
+};
+
+static const struct value_string nack_names[] = {
+	{ NM_MT_LOAD_INIT_NACK,		"SOFTWARE LOAD INIT" },
+	{ NM_MT_LOAD_END_NACK,		"SOFTWARE LOAD END" },
+	{ NM_MT_SW_ACT_REQ_NACK,	"SOFTWARE ACTIVATE REQUEST" },
+	{ NM_MT_ACTIVATE_SW_NACK,	"ACTIVATE SOFTWARE" },
+	{ NM_MT_ESTABLISH_TEI_NACK,	"ESTABLISH TEI" },
+	{ NM_MT_CONN_TERR_SIGN_NACK,	"CONNECT TERRESTRIAL SIGNALLING" },
+	{ NM_MT_DISC_TERR_SIGN_NACK,	"DISCONNECT TERRESTRIAL SIGNALLING" },
+	{ NM_MT_CONN_TERR_TRAF_NACK,	"CONNECT TERRESTRIAL TRAFFIC" },
+	{ NM_MT_DISC_TERR_TRAF_NACK,	"DISCONNECT TERRESTRIAL TRAFFIC" },
+	{ NM_MT_CONN_MDROP_LINK_NACK,	"CONNECT MULTI-DROP LINK" },
+	{ NM_MT_DISC_MDROP_LINK_NACK,	"DISCONNECT MULTI-DROP LINK" },
+	{ NM_MT_SET_BTS_ATTR_NACK,	"SET BTS ATTRIBUTE" },
+	{ NM_MT_SET_RADIO_ATTR_NACK,	"SET RADIO ATTRIBUTE" },
+	{ NM_MT_SET_CHAN_ATTR_NACK,	"SET CHANNEL ATTRIBUTE" },
+	{ NM_MT_PERF_TEST_NACK,		"PERFORM TEST" },
+	{ NM_MT_SEND_TEST_REP_NACK,	"SEND TEST REPORT" },
+	{ NM_MT_STOP_TEST_NACK,		"STOP TEST" },
+	{ NM_MT_STOP_EVENT_REP_NACK,	"STOP EVENT REPORT" },
+	{ NM_MT_REST_EVENT_REP_NACK,	"RESET EVENT REPORT" },
+	{ NM_MT_CHG_ADM_STATE_NACK,	"CHANGE ADMINISTRATIVE STATE" },
+	{ NM_MT_CHG_ADM_STATE_REQ_NACK,
+				"CHANGE ADMINISTRATIVE STATE REQUEST" },
+	{ NM_MT_REP_OUTST_ALARMS_NACK,	"REPORT OUTSTANDING ALARMS" },
+	{ NM_MT_CHANGEOVER_NACK,	"CHANGEOVER" },
+	{ NM_MT_OPSTART_NACK,		"OPSTART" },
+	{ NM_MT_REINIT_NACK,		"REINIT" },
+	{ NM_MT_SET_SITE_OUT_NACK,	"SET SITE OUTPUT" },
+	{ NM_MT_CHG_HW_CONF_NACK,	"CHANGE HARDWARE CONFIGURATION" },
+	{ NM_MT_GET_ATTR_NACK,		"GET ATTRIBUTE" },
+	{ NM_MT_SET_ALARM_THRES_NACK,	"SET ALARM THRESHOLD" },
+	{ NM_MT_BS11_BEGIN_DB_TX_NACK,	"BS11 BEGIN DATABASE TRANSMISSION" },
+	{ NM_MT_BS11_END_DB_TX_NACK,	"BS11 END DATABASE TRANSMISSION" },
+	{ NM_MT_BS11_CREATE_OBJ_NACK,	"BS11 CREATE OBJECT" },
+	{ NM_MT_BS11_DELETE_OBJ_NACK,	"BS11 DELETE OBJECT" },
+	{ 0,				NULL }
+};
+
+/* Chapter 9.4.36 */
+static const struct value_string nack_cause_names[] = {
+	/* General Nack Causes */
+	{ NM_NACK_INCORR_STRUCT,	"Incorrect message structure" },
+	{ NM_NACK_MSGTYPE_INVAL,	"Invalid message type value" },
+	{ NM_NACK_OBJCLASS_INVAL,	"Invalid Object class value" },
+	{ NM_NACK_OBJCLASS_NOTSUPP,	"Object class not supported" },
+	{ NM_NACK_BTSNR_UNKN,		"BTS no. unknown" },
+	{ NM_NACK_TRXNR_UNKN,		"Baseband Transceiver no. unknown" },
+	{ NM_NACK_OBJINST_UNKN,		"Object Instance unknown" },
+	{ NM_NACK_ATTRID_INVAL,		"Invalid attribute identifier value" },
+	{ NM_NACK_ATTRID_NOTSUPP,	"Attribute identifier not supported" },
+	{ NM_NACK_PARAM_RANGE,		"Parameter value outside permitted range" },
+	{ NM_NACK_ATTRLIST_INCONSISTENT,"Inconsistency in attribute list" },
+	{ NM_NACK_SPEC_IMPL_NOTSUPP,	"Specified implementation not supported" },
+	{ NM_NACK_CANT_PERFORM,		"Message cannot be performed" },
+	/* Specific Nack Causes */
+	{ NM_NACK_RES_NOTIMPL,		"Resource not implemented" },
+	{ NM_NACK_RES_NOTAVAIL,		"Resource not available" },
+	{ NM_NACK_FREQ_NOTAVAIL,	"Frequency not available" },
+	{ NM_NACK_TEST_NOTSUPP,		"Test not supported" },
+	{ NM_NACK_CAPACITY_RESTR,	"Capacity restrictions" },
+	{ NM_NACK_PHYSCFG_NOTPERFORM,	"Physical configuration cannot be performed" },
+	{ NM_NACK_TEST_NOTINIT,		"Test not initiated" },
+	{ NM_NACK_PHYSCFG_NOTRESTORE,	"Physical configuration cannot be restored" },
+	{ NM_NACK_TEST_NOSUCH,		"No such test" },
+	{ NM_NACK_TEST_NOSTOP,		"Test cannot be stopped" },
+	{ NM_NACK_MSGINCONSIST_PHYSCFG,	"Message inconsistent with physical configuration" },
+	{ NM_NACK_FILE_INCOMPLETE,	"Complete file notreceived" },
+	{ NM_NACK_FILE_NOTAVAIL,	"File not available at destination" },
+	{ NM_NACK_FILE_NOTACTIVATE,	"File cannot be activate" },
+	{ NM_NACK_REQ_NOT_GRANT,	"Request not granted" },
+	{ NM_NACK_WAIT,			"Wait" },
+	{ NM_NACK_NOTH_REPORT_EXIST,	"Nothing reportable existing" },
+	{ NM_NACK_MEAS_NOTSUPP,		"Measurement not supported" },
+	{ NM_NACK_MEAS_NOTSTART,	"Measurement not started" },
+	{ 0,				NULL }
+};
+
+static const char *nack_cause_name(u_int8_t cause)
+{
+	return get_value_string(nack_cause_names, cause);
+}
+
+/* Chapter 9.4.16: Event Type */
+static const struct value_string event_type_names[] = {
+	{ NM_EVT_COMM_FAIL,		"communication failure" },
+	{ NM_EVT_QOS_FAIL,		"quality of service failure" },
+	{ NM_EVT_PROC_FAIL,		"processing failure" },
+	{ NM_EVT_EQUIP_FAIL,		"equipment failure" },
+	{ NM_EVT_ENV_FAIL,		"environment failure" },
+	{ 0,				NULL }
+};
+
+static const char *event_type_name(u_int8_t cause)
+{
+	return get_value_string(event_type_names, cause);
+}
+
+/* Chapter 9.4.63: Perceived Severity */
+static const struct value_string severity_names[] = {
+	{ NM_SEVER_CEASED,		"failure ceased" },
+	{ NM_SEVER_CRITICAL,		"critical failure" },
+	{ NM_SEVER_MAJOR,		"major failure" },
+	{ NM_SEVER_MINOR,		"minor failure" },
+	{ NM_SEVER_WARNING,		"warning level failure" },
+	{ NM_SEVER_INDETERMINATE,	"indeterminate failure" },
+	{ 0,				NULL }
+};
+
+static const char *severity_name(u_int8_t cause)
+{
+	return get_value_string(severity_names, cause);
+}
+
+/* Attributes that the BSC can set, not only get, according to Section 9.4 */
+static const enum abis_nm_attr nm_att_settable[] = {
+	NM_ATT_ADD_INFO,
+	NM_ATT_ADD_TEXT,
+	NM_ATT_DEST,
+	NM_ATT_EVENT_TYPE,
+	NM_ATT_FILE_DATA,
+	NM_ATT_GET_ARI,
+	NM_ATT_HW_CONF_CHG,
+	NM_ATT_LIST_REQ_ATTR,
+	NM_ATT_MDROP_LINK,
+	NM_ATT_MDROP_NEXT,
+	NM_ATT_NACK_CAUSES,
+	NM_ATT_OUTST_ALARM,
+	NM_ATT_PHYS_CONF,
+	NM_ATT_PROB_CAUSE,
+	NM_ATT_RAD_SUBC,
+	NM_ATT_SOURCE,
+	NM_ATT_SPEC_PROB,
+	NM_ATT_START_TIME,
+	NM_ATT_TEST_DUR,
+	NM_ATT_TEST_NO,
+	NM_ATT_TEST_REPORT,
+	NM_ATT_WINDOW_SIZE,
+	NM_ATT_SEVERITY,
+	NM_ATT_MEAS_RES,
+	NM_ATT_MEAS_TYPE,
+};
+
+const struct tlv_definition nm_att_tlvdef = {
+	.def = {
+		[NM_ATT_ABIS_CHANNEL] =		{ TLV_TYPE_FIXED, 3 },
+		[NM_ATT_ADD_INFO] =		{ TLV_TYPE_TL16V },
+		[NM_ATT_ADD_TEXT] =		{ TLV_TYPE_TL16V },
+		[NM_ATT_ADM_STATE] =		{ TLV_TYPE_TV },
+		[NM_ATT_ARFCN_LIST]=		{ TLV_TYPE_TL16V },
+		[NM_ATT_AUTON_REPORT] =		{ TLV_TYPE_TV },
+		[NM_ATT_AVAIL_STATUS] =		{ TLV_TYPE_TL16V },
+		[NM_ATT_BCCH_ARFCN] =		{ TLV_TYPE_FIXED, 2 },
+		[NM_ATT_BSIC] =			{ TLV_TYPE_TV },
+		[NM_ATT_BTS_AIR_TIMER] =	{ TLV_TYPE_TV },
+		[NM_ATT_CCCH_L_I_P] =		{ TLV_TYPE_TV },
+		[NM_ATT_CCCH_L_T] =		{ TLV_TYPE_TV },
+		[NM_ATT_CHAN_COMB] =		{ TLV_TYPE_TV },
+		[NM_ATT_CONN_FAIL_CRIT] =	{ TLV_TYPE_TL16V },
+		[NM_ATT_DEST] =			{ TLV_TYPE_TL16V },
+		[NM_ATT_EVENT_TYPE] =		{ TLV_TYPE_TV },
+		[NM_ATT_FILE_DATA] =		{ TLV_TYPE_TL16V },
+		[NM_ATT_FILE_ID] =		{ TLV_TYPE_TL16V },
+		[NM_ATT_FILE_VERSION] =		{ TLV_TYPE_TL16V },
+		[NM_ATT_GSM_TIME] =		{ TLV_TYPE_FIXED, 2 },
+		[NM_ATT_HSN] =			{ TLV_TYPE_TV },
+		[NM_ATT_HW_CONFIG] =		{ TLV_TYPE_TL16V },
+		[NM_ATT_HW_DESC] =		{ TLV_TYPE_TL16V },
+		[NM_ATT_INTAVE_PARAM] =		{ TLV_TYPE_TV },
+		[NM_ATT_INTERF_BOUND] =		{ TLV_TYPE_FIXED, 6 },
+		[NM_ATT_LIST_REQ_ATTR] =	{ TLV_TYPE_TL16V },
+		[NM_ATT_MAIO] =			{ TLV_TYPE_TV },
+		[NM_ATT_MANUF_STATE] =		{ TLV_TYPE_TV },
+		[NM_ATT_MANUF_THRESH] =		{ TLV_TYPE_TL16V },
+		[NM_ATT_MANUF_ID] =		{ TLV_TYPE_TL16V },
+		[NM_ATT_MAX_TA] =		{ TLV_TYPE_TV },
+		[NM_ATT_MDROP_LINK] =		{ TLV_TYPE_FIXED, 2 },
+		[NM_ATT_MDROP_NEXT] =		{ TLV_TYPE_FIXED, 2 },
+		[NM_ATT_NACK_CAUSES] =		{ TLV_TYPE_TV },
+		[NM_ATT_NY1] =			{ TLV_TYPE_TV },
+		[NM_ATT_OPER_STATE] =		{ TLV_TYPE_TV },
+		[NM_ATT_OVERL_PERIOD] =		{ TLV_TYPE_TL16V },
+		[NM_ATT_PHYS_CONF] =		{ TLV_TYPE_TL16V },
+		[NM_ATT_POWER_CLASS] =		{ TLV_TYPE_TV },
+		[NM_ATT_POWER_THRESH] =		{ TLV_TYPE_FIXED, 3 },
+		[NM_ATT_PROB_CAUSE] =		{ TLV_TYPE_FIXED, 3 },
+		[NM_ATT_RACH_B_THRESH] =	{ TLV_TYPE_TV },
+		[NM_ATT_LDAVG_SLOTS] =		{ TLV_TYPE_FIXED, 2 },
+		[NM_ATT_RAD_SUBC] =		{ TLV_TYPE_TV },
+		[NM_ATT_RF_MAXPOWR_R] =		{ TLV_TYPE_TV },
+		[NM_ATT_SITE_INPUTS] =		{ TLV_TYPE_TL16V },
+		[NM_ATT_SITE_OUTPUTS] =		{ TLV_TYPE_TL16V },
+		[NM_ATT_SOURCE] =		{ TLV_TYPE_TL16V },
+		[NM_ATT_SPEC_PROB] =		{ TLV_TYPE_TV },
+		[NM_ATT_START_TIME] =		{ TLV_TYPE_FIXED, 2 },
+		[NM_ATT_T200] =			{ TLV_TYPE_FIXED, 7 },
+		[NM_ATT_TEI] =			{ TLV_TYPE_TV },
+		[NM_ATT_TEST_DUR] =		{ TLV_TYPE_FIXED, 2 },
+		[NM_ATT_TEST_NO] =		{ TLV_TYPE_TV },
+		[NM_ATT_TEST_REPORT] =		{ TLV_TYPE_TL16V },
+		[NM_ATT_VSWR_THRESH] =		{ TLV_TYPE_FIXED, 2 },
+		[NM_ATT_WINDOW_SIZE] = 		{ TLV_TYPE_TV },
+		[NM_ATT_TSC] =			{ TLV_TYPE_TV },
+		[NM_ATT_SW_CONFIG] =		{ TLV_TYPE_TL16V },
+		[NM_ATT_SEVERITY] = 		{ TLV_TYPE_TV },
+		[NM_ATT_GET_ARI] =		{ TLV_TYPE_TL16V },
+		[NM_ATT_HW_CONF_CHG] = 		{ TLV_TYPE_TL16V },
+		[NM_ATT_OUTST_ALARM] =		{ TLV_TYPE_TV },
+		[NM_ATT_MEAS_RES] =		{ TLV_TYPE_TL16V },
+	},
+};
+
+static const enum abis_nm_chan_comb chcomb4pchan[] = {
+	[GSM_PCHAN_CCCH]	= NM_CHANC_mainBCCH,
+	[GSM_PCHAN_CCCH_SDCCH4]	= NM_CHANC_BCCHComb,
+	[GSM_PCHAN_TCH_F]	= NM_CHANC_TCHFull,
+	[GSM_PCHAN_TCH_H]	= NM_CHANC_TCHHalf,
+	[GSM_PCHAN_SDCCH8_SACCH8C] = NM_CHANC_SDCCH,
+	[GSM_PCHAN_PDCH]	= NM_CHANC_IPAC_PDCH,
+	[GSM_PCHAN_TCH_F_PDCH]	= NM_CHANC_IPAC_TCHFull_PDCH,
+	/* FIXME: bounds check */
+};
+
+int abis_nm_chcomb4pchan(enum gsm_phys_chan_config pchan)
+{
+	if (pchan < ARRAY_SIZE(chcomb4pchan))
+		return chcomb4pchan[pchan];
+
+	return -EINVAL;
+}
+
+int abis_nm_tlv_parse(struct tlv_parsed *tp, struct gsm_bts *bts, const u_int8_t *buf, int len)
+{
+	if (!bts->model)
+		return -EIO;
+	return tlv_parse(tp, &bts->model->nm_att_tlvdef, buf, len, 0, 0);
+}
+
+static int is_in_arr(enum abis_nm_msgtype mt, const enum abis_nm_msgtype *arr, int size)
+{
+	int i;
+
+	for (i = 0; i < size; i++) {
+		if (arr[i] == mt)
+			return 1;
+	}
+
+	return 0;
+}
+
+#if 0
+/* is this msgtype the usual ACK/NACK type ? */
+static int is_ack_nack(enum abis_nm_msgtype mt)
+{
+	return !is_in_arr(mt, no_ack_nack, ARRAY_SIZE(no_ack_nack));
+}
+#endif
+
+/* is this msgtype a report ? */
+static int is_report(enum abis_nm_msgtype mt)
+{
+	return is_in_arr(mt, reports, ARRAY_SIZE(reports));
+}
+
+#define MT_ACK(x)	(x+1)
+#define MT_NACK(x)	(x+2)
+
+static void fill_om_hdr(struct abis_om_hdr *oh, u_int8_t len)
+{
+	oh->mdisc = ABIS_OM_MDISC_FOM;
+	oh->placement = ABIS_OM_PLACEMENT_ONLY;
+	oh->sequence = 0;
+	oh->length = len;
+}
+
+static void fill_om_fom_hdr(struct abis_om_hdr *oh, u_int8_t len,
+			    u_int8_t msg_type, u_int8_t obj_class,
+			    u_int8_t bts_nr, u_int8_t trx_nr, u_int8_t ts_nr)
+{
+	struct abis_om_fom_hdr *foh =
+			(struct abis_om_fom_hdr *) oh->data;
+
+	fill_om_hdr(oh, len+sizeof(*foh));
+	foh->msg_type = msg_type;
+	foh->obj_class = obj_class;
+	foh->obj_inst.bts_nr = bts_nr;
+	foh->obj_inst.trx_nr = trx_nr;
+	foh->obj_inst.ts_nr = ts_nr;
+}
+
+static struct msgb *nm_msgb_alloc(void)
+{
+	return msgb_alloc_headroom(OM_ALLOC_SIZE, OM_HEADROOM_SIZE,
+				   "OML");
+}
+
+/* Send a OML NM Message from BSC to BTS */
+static int abis_nm_queue_msg(struct gsm_bts *bts, struct msgb *msg)
+{
+	msg->trx = bts->c0;
+
+	/* queue OML messages */
+	if (llist_empty(&bts->abis_queue) && !bts->abis_nm_pend) {
+		bts->abis_nm_pend = OBSC_NM_W_ACK_CB(msg);
+		return _abis_nm_sendmsg(msg, 0);
+	} else {
+		msgb_enqueue(&bts->abis_queue, msg);
+		return 0;
+	}
+
+}
+
+int abis_nm_sendmsg(struct gsm_bts *bts, struct msgb *msg)
+{
+	OBSC_NM_W_ACK_CB(msg) = 1;
+	return abis_nm_queue_msg(bts, msg);
+}
+
+static int abis_nm_sendmsg_direct(struct gsm_bts *bts, struct msgb *msg)
+{
+	OBSC_NM_W_ACK_CB(msg) = 0;
+	return abis_nm_queue_msg(bts, msg);
+}
+
+static int abis_nm_rcvmsg_sw(struct msgb *mb);
+
+const struct value_string abis_nm_obj_class_names[] = {
+	{ NM_OC_SITE_MANAGER,	"SITE-MANAGER" },
+	{ NM_OC_BTS,		"BTS" },
+	{ NM_OC_RADIO_CARRIER,	"RADIO-CARRIER" },
+	{ NM_OC_BASEB_TRANSC,	"BASEBAND-TRANSCEIVER" },
+	{ NM_OC_CHANNEL,	"CHANNEL" },
+	{ NM_OC_BS11_ADJC,	"ADJC" },
+	{ NM_OC_BS11_HANDOVER,	"HANDOVER" },
+	{ NM_OC_BS11_PWR_CTRL,	"POWER-CONTROL" },
+	{ NM_OC_BS11_BTSE,	"BTSE" },
+	{ NM_OC_BS11_RACK,	"RACK" },
+	{ NM_OC_BS11_TEST,	"TEST" },
+	{ NM_OC_BS11_ENVABTSE,	"ENVABTSE" },
+	{ NM_OC_BS11_BPORT,	"BPORT" },
+	{ NM_OC_GPRS_NSE,	"GPRS-NSE" },
+	{ NM_OC_GPRS_CELL,	"GPRS-CELL" },
+	{ NM_OC_GPRS_NSVC,	"GPRS-NSVC" },
+	{ NM_OC_BS11,		"SIEMENSHW" },
+	{ 0,			NULL }
+};
+
+static const char *obj_class_name(u_int8_t oc)
+{
+	return get_value_string(abis_nm_obj_class_names, oc);
+}
+
+const char *nm_opstate_name(u_int8_t os)
+{
+	switch (os) {
+	case NM_OPSTATE_DISABLED:
+		return "Disabled";
+	case NM_OPSTATE_ENABLED:
+		return "Enabled";
+	case NM_OPSTATE_NULL:
+		return "NULL";
+	default:
+		return "RFU";
+	}
+}
+
+/* Chapter 9.4.7 */
+static const struct value_string avail_names[] = {
+	{ 0, 	"In test" },
+	{ 1,	"Failed" },
+	{ 2,	"Power off" },
+	{ 3,	"Off line" },
+	/* Not used */
+	{ 5,	"Dependency" },
+	{ 6,	"Degraded" },
+	{ 7,	"Not installed" },
+	{ 0xff, "OK" },
+	{ 0,	NULL }
+};
+
+const char *nm_avail_name(u_int8_t avail)
+{
+	return get_value_string(avail_names, avail);
+}
+
+static struct value_string test_names[] = {
+	/* FIXME: standard test names */
+	{ NM_IPACC_TESTNO_CHAN_USAGE, "Channel Usage" },
+	{ NM_IPACC_TESTNO_BCCH_CHAN_USAGE, "BCCH Channel Usage" },
+	{ NM_IPACC_TESTNO_FREQ_SYNC, "Frequency Synchronization" },
+	{ NM_IPACC_TESTNO_BCCH_INFO, "BCCH Info" },
+	{ NM_IPACC_TESTNO_TX_BEACON, "Transmit Beacon" },
+	{ NM_IPACC_TESTNO_SYSINFO_MONITOR, "System Info Monitor" },
+	{ NM_IPACC_TESTNO_BCCCH_MONITOR, "BCCH Monitor" },
+	{ 0, NULL }
+};
+
+const struct value_string abis_nm_adm_state_names[] = {
+	{ NM_STATE_LOCKED,	"Locked" },
+	{ NM_STATE_UNLOCKED,	"Unlocked" },
+	{ NM_STATE_SHUTDOWN,	"Shutdown" },
+	{ NM_STATE_NULL,	"NULL" },
+	{ 0, NULL }
+};
+
+const char *nm_adm_name(u_int8_t adm)
+{
+	return get_value_string(abis_nm_adm_state_names, adm);
+}
+
+int nm_is_running(struct gsm_nm_state *s) {
+	return (s->operational == NM_OPSTATE_ENABLED) && (
+		(s->availability == NM_AVSTATE_OK) ||
+		(s->availability == 0xff)
+	);
+}
+
+static void debugp_foh(struct abis_om_fom_hdr *foh)
+{
+	DEBUGP(DNM, "OC=%s(%02x) INST=(%02x,%02x,%02x) ",
+		obj_class_name(foh->obj_class), foh->obj_class,
+		foh->obj_inst.bts_nr, foh->obj_inst.trx_nr,
+		foh->obj_inst.ts_nr);
+}
+
+/* obtain the gsm_nm_state data structure for a given object instance */
+static struct gsm_nm_state *
+objclass2nmstate(struct gsm_bts *bts, u_int8_t obj_class,
+		 struct abis_om_obj_inst *obj_inst)
+{
+	struct gsm_bts_trx *trx;
+	struct gsm_nm_state *nm_state = NULL;
+
+	switch (obj_class) {
+	case NM_OC_BTS:
+		nm_state = &bts->nm_state;
+		break;
+	case NM_OC_RADIO_CARRIER:
+		if (obj_inst->trx_nr >= bts->num_trx) {
+			DEBUGPC(DNM, "TRX %u does not exist ", obj_inst->trx_nr);
+			return NULL;
+		}
+		trx = gsm_bts_trx_num(bts, obj_inst->trx_nr);
+		nm_state = &trx->nm_state;
+		break;
+	case NM_OC_BASEB_TRANSC:
+		if (obj_inst->trx_nr >= bts->num_trx) {
+			DEBUGPC(DNM, "TRX %u does not exist ", obj_inst->trx_nr);
+			return NULL;
+		}
+		trx = gsm_bts_trx_num(bts, obj_inst->trx_nr);
+		nm_state = &trx->bb_transc.nm_state;
+		break;
+	case NM_OC_CHANNEL:
+		if (obj_inst->trx_nr >= bts->num_trx) {
+			DEBUGPC(DNM, "TRX %u does not exist ", obj_inst->trx_nr);
+			return NULL;
+		}
+		trx = gsm_bts_trx_num(bts, obj_inst->trx_nr);
+		if (obj_inst->ts_nr >= TRX_NR_TS)
+			return NULL;
+		nm_state = &trx->ts[obj_inst->ts_nr].nm_state;
+		break;
+	case NM_OC_SITE_MANAGER:
+		nm_state = &bts->site_mgr.nm_state;
+		break;
+	case NM_OC_BS11:
+		switch (obj_inst->bts_nr) {
+		case BS11_OBJ_CCLK:
+			nm_state = &bts->bs11.cclk.nm_state;
+			break;
+		case BS11_OBJ_BBSIG:
+			if (obj_inst->ts_nr > bts->num_trx)
+				return NULL;
+			trx = gsm_bts_trx_num(bts, obj_inst->trx_nr);
+			nm_state = &trx->bs11.bbsig.nm_state;
+			break;
+		case BS11_OBJ_PA:
+			if (obj_inst->ts_nr > bts->num_trx)
+				return NULL;
+			trx = gsm_bts_trx_num(bts, obj_inst->trx_nr);
+			nm_state = &trx->bs11.pa.nm_state;
+			break;
+		default:
+			return NULL;
+		}
+	case NM_OC_BS11_RACK:
+		nm_state = &bts->bs11.rack.nm_state;
+		break;
+	case NM_OC_BS11_ENVABTSE:
+		if (obj_inst->trx_nr >= ARRAY_SIZE(bts->bs11.envabtse))
+			return NULL;
+		nm_state = &bts->bs11.envabtse[obj_inst->trx_nr].nm_state;
+		break;
+	case NM_OC_GPRS_NSE:
+		nm_state = &bts->gprs.nse.nm_state;
+		break;
+	case NM_OC_GPRS_CELL:
+		nm_state = &bts->gprs.cell.nm_state;
+		break;
+	case NM_OC_GPRS_NSVC:
+		if (obj_inst->trx_nr >= ARRAY_SIZE(bts->gprs.nsvc))
+			return NULL;
+		nm_state = &bts->gprs.nsvc[obj_inst->trx_nr].nm_state;
+		break;
+	}
+	return nm_state;
+}
+
+/* obtain the in-memory data structure of a given object instance */
+static void *
+objclass2obj(struct gsm_bts *bts, u_int8_t obj_class,
+	     struct abis_om_obj_inst *obj_inst)
+{
+	struct gsm_bts_trx *trx;
+	void *obj = NULL;
+
+	switch (obj_class) {
+	case NM_OC_BTS:
+		obj = bts;
+		break;
+	case NM_OC_RADIO_CARRIER:
+		if (obj_inst->trx_nr >= bts->num_trx) {
+			DEBUGPC(DNM, "TRX %u does not exist ", obj_inst->trx_nr);
+			return NULL;
+		}
+		trx = gsm_bts_trx_num(bts, obj_inst->trx_nr);
+		obj = trx;
+		break;
+	case NM_OC_BASEB_TRANSC:
+		if (obj_inst->trx_nr >= bts->num_trx) {
+			DEBUGPC(DNM, "TRX %u does not exist ", obj_inst->trx_nr);
+			return NULL;
+		}
+		trx = gsm_bts_trx_num(bts, obj_inst->trx_nr);
+		obj = &trx->bb_transc;
+		break;
+	case NM_OC_CHANNEL:
+		if (obj_inst->trx_nr >= bts->num_trx) {
+			DEBUGPC(DNM, "TRX %u does not exist ", obj_inst->trx_nr);
+			return NULL;
+		}
+		trx = gsm_bts_trx_num(bts, obj_inst->trx_nr);
+		if (obj_inst->ts_nr >= TRX_NR_TS)
+			return NULL;
+		obj = &trx->ts[obj_inst->ts_nr];
+		break;
+	case NM_OC_SITE_MANAGER:
+		obj = &bts->site_mgr;
+		break;
+	case NM_OC_GPRS_NSE:
+		obj = &bts->gprs.nse;
+		break;
+	case NM_OC_GPRS_CELL:
+		obj = &bts->gprs.cell;
+		break;
+	case NM_OC_GPRS_NSVC:
+		if (obj_inst->trx_nr >= ARRAY_SIZE(bts->gprs.nsvc))
+			return NULL;
+		obj = &bts->gprs.nsvc[obj_inst->trx_nr];
+		break;
+	}
+	return obj;
+}
+
+/* Update the administrative state of a given object in our in-memory data
+ * structures and send an event to the higher layer */
+static int update_admstate(struct gsm_bts *bts, u_int8_t obj_class,
+			   struct abis_om_obj_inst *obj_inst, u_int8_t adm_state)
+{
+	struct gsm_nm_state *nm_state, new_state;
+	struct nm_statechg_signal_data nsd;
+
+	nsd.obj = objclass2obj(bts, obj_class, obj_inst);
+	if (!nsd.obj)
+		return -EINVAL;
+	nm_state = objclass2nmstate(bts, obj_class, obj_inst);
+	if (!nm_state)
+		return -1;
+
+	new_state = *nm_state;
+	new_state.administrative = adm_state;
+
+	nsd.obj_class = obj_class;
+	nsd.old_state = nm_state;
+	nsd.new_state = &new_state;
+	nsd.obj_inst = obj_inst;
+	dispatch_signal(SS_NM, S_NM_STATECHG_ADM, &nsd);
+
+	nm_state->administrative = adm_state;
+
+	return 0;
+}
+
+static int abis_nm_rx_statechg_rep(struct msgb *mb)
+{
+	struct abis_om_hdr *oh = msgb_l2(mb);
+	struct abis_om_fom_hdr *foh = msgb_l3(mb);
+	struct gsm_bts *bts = mb->trx->bts;
+	struct tlv_parsed tp;
+	struct gsm_nm_state *nm_state, new_state;
+
+	DEBUGPC(DNM, "STATE CHG: ");
+
+	memset(&new_state, 0, sizeof(new_state));
+
+	nm_state = objclass2nmstate(bts, foh->obj_class, &foh->obj_inst);
+	if (!nm_state) {
+		DEBUGPC(DNM, "unknown object class\n");
+		return -EINVAL;
+	}
+
+	new_state = *nm_state;
+	
+	abis_nm_tlv_parse(&tp, bts, foh->data, oh->length-sizeof(*foh));
+	if (TLVP_PRESENT(&tp, NM_ATT_OPER_STATE)) {
+		new_state.operational = *TLVP_VAL(&tp, NM_ATT_OPER_STATE);
+		DEBUGPC(DNM, "OP_STATE=%s ", nm_opstate_name(new_state.operational));
+	}
+	if (TLVP_PRESENT(&tp, NM_ATT_AVAIL_STATUS)) {
+		if (TLVP_LEN(&tp, NM_ATT_AVAIL_STATUS) == 0)
+			new_state.availability = 0xff;
+		else
+			new_state.availability = *TLVP_VAL(&tp, NM_ATT_AVAIL_STATUS);
+		DEBUGPC(DNM, "AVAIL=%s(%02x) ", nm_avail_name(new_state.availability),
+			new_state.availability);
+	} else
+		new_state.availability = 0xff;
+	if (TLVP_PRESENT(&tp, NM_ATT_ADM_STATE)) {
+		new_state.administrative = *TLVP_VAL(&tp, NM_ATT_ADM_STATE);
+		DEBUGPC(DNM, "ADM=%2s ", nm_adm_name(new_state.administrative));
+	}
+	DEBUGPC(DNM, "\n");
+
+	if ((new_state.administrative != 0 && nm_state->administrative == 0) ||
+	    new_state.operational != nm_state->operational ||
+	    new_state.availability != nm_state->availability) {
+		/* Update the operational state of a given object in our in-memory data
+ 		* structures and send an event to the higher layer */
+		struct nm_statechg_signal_data nsd;
+		nsd.obj = objclass2obj(bts, foh->obj_class, &foh->obj_inst);
+		nsd.obj_class = foh->obj_class;
+		nsd.old_state = nm_state;
+		nsd.new_state = &new_state;
+		nsd.obj_inst = &foh->obj_inst;
+		dispatch_signal(SS_NM, S_NM_STATECHG_OPER, &nsd);
+		nm_state->operational = new_state.operational;
+		nm_state->availability = new_state.availability;
+		if (nm_state->administrative == 0)
+			nm_state->administrative = new_state.administrative;
+	}
+#if 0
+	if (op_state == 1) {
+		/* try to enable objects that are disabled */
+		abis_nm_opstart(bts, foh->obj_class,
+				foh->obj_inst.bts_nr,
+				foh->obj_inst.trx_nr,
+				foh->obj_inst.ts_nr);
+	}
+#endif
+	return 0;
+}
+
+static int rx_fail_evt_rep(struct msgb *mb)
+{
+	struct abis_om_hdr *oh = msgb_l2(mb);
+	struct abis_om_fom_hdr *foh = msgb_l3(mb);
+	struct tlv_parsed tp;
+	const uint8_t *p_val;
+	char *p_text;
+
+	DEBUGPC(DNM, "Failure Event Report ");
+	
+	abis_nm_tlv_parse(&tp, mb->trx->bts, foh->data, oh->length-sizeof(*foh));
+
+	if (TLVP_PRESENT(&tp, NM_ATT_EVENT_TYPE))
+		DEBUGPC(DNM, "Type=%s ", event_type_name(*TLVP_VAL(&tp, NM_ATT_EVENT_TYPE)));
+	if (TLVP_PRESENT(&tp, NM_ATT_SEVERITY))
+		DEBUGPC(DNM, "Severity=%s ", severity_name(*TLVP_VAL(&tp, NM_ATT_SEVERITY)));
+	if (TLVP_PRESENT(&tp, NM_ATT_PROB_CAUSE)) {
+		p_val = TLVP_VAL(&tp, NM_ATT_PROB_CAUSE);
+		DEBUGPC(DNM, "Probable cause= %02X %02X %02X ", p_val[0], p_val[1], p_val[2]);
+	}
+	if (TLVP_PRESENT(&tp, NM_ATT_ADD_TEXT)) {
+		p_val = TLVP_VAL(&tp, NM_ATT_ADD_TEXT);
+		p_text = talloc_strndup(tall_bsc_ctx, (const char *) p_val, TLVP_LEN(&tp, NM_ATT_ADD_TEXT));
+		if (p_text) {
+			DEBUGPC(DNM, "Additional Text=%s ", p_text);
+			talloc_free(p_text);
+		}
+	}
+
+	DEBUGPC(DNM, "\n");
+
+	return 0;
+}
+
+static int abis_nm_rcvmsg_report(struct msgb *mb)
+{
+	struct abis_om_fom_hdr *foh = msgb_l3(mb);
+	u_int8_t mt = foh->msg_type;
+
+	debugp_foh(foh);
+
+	//nmh->cfg->report_cb(mb, foh);
+
+	switch (mt) {
+	case NM_MT_STATECHG_EVENT_REP:
+		return abis_nm_rx_statechg_rep(mb);
+		break;
+	case NM_MT_SW_ACTIVATED_REP:
+		DEBUGPC(DNM, "Software Activated Report\n");
+		dispatch_signal(SS_NM, S_NM_SW_ACTIV_REP, mb);
+		break;
+	case NM_MT_FAILURE_EVENT_REP:
+		rx_fail_evt_rep(mb);
+		dispatch_signal(SS_NM, S_NM_FAIL_REP, mb);
+		break;
+	case NM_MT_TEST_REP:
+		DEBUGPC(DNM, "Test Report\n");
+		dispatch_signal(SS_NM, S_NM_TEST_REP, mb);
+		break;
+	default:
+		DEBUGPC(DNM, "reporting NM MT 0x%02x\n", mt);
+		break;
+		
+	};
+
+	return 0;
+}
+
+/* Activate the specified software into the BTS */
+static int ipacc_sw_activate(struct gsm_bts *bts, u_int8_t obj_class, u_int8_t i0, u_int8_t i1,
+			     u_int8_t i2, const u_int8_t *sw_desc, u_int8_t swdesc_len)
+{
+	struct abis_om_hdr *oh;
+	struct msgb *msg = nm_msgb_alloc();
+	u_int8_t len = swdesc_len;
+	u_int8_t *trailer;
+
+	oh = (struct abis_om_hdr *) msgb_put(msg, ABIS_OM_FOM_HDR_SIZE);
+	fill_om_fom_hdr(oh, len, NM_MT_ACTIVATE_SW, obj_class, i0, i1, i2);
+
+	trailer = msgb_put(msg, swdesc_len);
+	memcpy(trailer, sw_desc, swdesc_len);
+
+	return abis_nm_sendmsg(bts, msg);
+}
+
+static int abis_nm_parse_sw_descr(const u_int8_t *sw_descr, int sw_descr_len)
+{
+	static const struct tlv_definition sw_descr_def = {
+		.def = {
+			[NM_ATT_FILE_ID] =		{ TLV_TYPE_TL16V, },
+			[NM_ATT_FILE_VERSION] =		{ TLV_TYPE_TL16V, },
+		},
+	};
+
+	u_int8_t tag;
+	u_int16_t tag_len;
+	const u_int8_t *val;
+	int ofs = 0, len;
+
+	/* Classic TLV parsing doesn't work well with SW_DESCR because of it's
+	 * nested nature and the fact you have to assume it contains only two sub
+	 * tags NM_ATT_FILE_VERSION & NM_ATT_FILE_ID to parse it */
+
+	if (sw_descr[0] != NM_ATT_SW_DESCR) {
+		DEBUGP(DNM, "SW_DESCR attribute identifier not found!\n");
+		return -1;
+	}
+	ofs += 1;
+
+	len = tlv_parse_one(&tag, &tag_len, &val,
+		&sw_descr_def, &sw_descr[ofs], sw_descr_len-ofs);
+	if (len < 0 || (tag != NM_ATT_FILE_ID)) {
+		DEBUGP(DNM, "FILE_ID attribute identifier not found!\n");
+		return -2;
+	}
+	ofs += len;
+
+	len = tlv_parse_one(&tag, &tag_len, &val,
+		&sw_descr_def, &sw_descr[ofs], sw_descr_len-ofs);
+	if (len < 0 || (tag != NM_ATT_FILE_VERSION)) {
+		DEBUGP(DNM, "FILE_VERSION attribute identifier not found!\n");
+		return -3;
+	}
+	ofs += len;
+
+	return ofs;
+}
+
+static int abis_nm_rx_sw_act_req(struct msgb *mb)
+{
+	struct abis_om_hdr *oh = msgb_l2(mb);
+	struct abis_om_fom_hdr *foh = msgb_l3(mb);
+	struct tlv_parsed tp;
+	const u_int8_t *sw_config;
+	int ret, sw_config_len, sw_descr_len;
+
+	debugp_foh(foh);
+
+	DEBUGPC(DNM, "SW Activate Request: ");
+
+	DEBUGP(DNM, "Software Activate Request, ACKing and Activating\n");
+
+	ret = abis_nm_sw_act_req_ack(mb->trx->bts, foh->obj_class,
+				      foh->obj_inst.bts_nr,
+				      foh->obj_inst.trx_nr,
+				      foh->obj_inst.ts_nr, 0,
+				      foh->data, oh->length-sizeof(*foh));
+
+	abis_nm_tlv_parse(&tp, mb->trx->bts, foh->data, oh->length-sizeof(*foh));
+	sw_config = TLVP_VAL(&tp, NM_ATT_SW_CONFIG);
+	sw_config_len = TLVP_LEN(&tp, NM_ATT_SW_CONFIG);
+	if (!TLVP_PRESENT(&tp, NM_ATT_SW_CONFIG)) {
+		DEBUGP(DNM, "SW config not found! Can't continue.\n");
+		return -EINVAL;
+	} else {
+		DEBUGP(DNM, "Found SW config: %s\n", hexdump(sw_config, sw_config_len));
+	}
+
+		/* Use the first SW_DESCR present in SW config */
+	sw_descr_len = abis_nm_parse_sw_descr(sw_config, sw_config_len);
+	if (sw_descr_len < 0)
+		return -EINVAL;
+
+	return ipacc_sw_activate(mb->trx->bts, foh->obj_class,
+				 foh->obj_inst.bts_nr,
+				 foh->obj_inst.trx_nr,
+				 foh->obj_inst.ts_nr,
+				 sw_config, sw_descr_len);
+}
+
+/* Receive a CHANGE_ADM_STATE_ACK, parse the TLV and update local state */
+static int abis_nm_rx_chg_adm_state_ack(struct msgb *mb)
+{
+	struct abis_om_hdr *oh = msgb_l2(mb);
+	struct abis_om_fom_hdr *foh = msgb_l3(mb);
+	struct tlv_parsed tp;
+	u_int8_t adm_state;
+
+	abis_nm_tlv_parse(&tp, mb->trx->bts, foh->data, oh->length-sizeof(*foh));
+	if (!TLVP_PRESENT(&tp, NM_ATT_ADM_STATE))
+		return -EINVAL;
+
+	adm_state = *TLVP_VAL(&tp, NM_ATT_ADM_STATE);
+
+	return update_admstate(mb->trx->bts, foh->obj_class, &foh->obj_inst, adm_state);
+}
+
+static int abis_nm_rx_lmt_event(struct msgb *mb)
+{
+	struct abis_om_hdr *oh = msgb_l2(mb);
+	struct abis_om_fom_hdr *foh = msgb_l3(mb);
+	struct tlv_parsed tp;
+
+	DEBUGP(DNM, "LMT Event ");
+	abis_nm_tlv_parse(&tp, mb->trx->bts, foh->data, oh->length-sizeof(*foh));
+	if (TLVP_PRESENT(&tp, NM_ATT_BS11_LMT_LOGON_SESSION) &&
+	    TLVP_LEN(&tp, NM_ATT_BS11_LMT_LOGON_SESSION) >= 1) {
+		u_int8_t onoff = *TLVP_VAL(&tp, NM_ATT_BS11_LMT_LOGON_SESSION);
+		DEBUGPC(DNM, "LOG%s ", onoff ? "ON" : "OFF");
+	}
+	if (TLVP_PRESENT(&tp, NM_ATT_BS11_LMT_USER_ACC_LEV) &&
+	    TLVP_LEN(&tp, NM_ATT_BS11_LMT_USER_ACC_LEV) >= 1) {
+		u_int8_t level = *TLVP_VAL(&tp, NM_ATT_BS11_LMT_USER_ACC_LEV);
+		DEBUGPC(DNM, "Level=%u ", level);
+	}
+	if (TLVP_PRESENT(&tp, NM_ATT_BS11_LMT_USER_NAME) &&
+	    TLVP_LEN(&tp, NM_ATT_BS11_LMT_USER_NAME) >= 1) {
+		char *name = (char *) TLVP_VAL(&tp, NM_ATT_BS11_LMT_USER_NAME);
+		DEBUGPC(DNM, "Username=%s ", name);
+	}
+	DEBUGPC(DNM, "\n");
+	/* FIXME: parse LMT LOGON TIME */
+	return 0;
+}
+
+static void abis_nm_queue_send_next(struct gsm_bts *bts)
+{
+	int wait = 0;
+	struct msgb *msg;
+	/* the queue is empty */
+	while (!llist_empty(&bts->abis_queue)) {
+		msg = msgb_dequeue(&bts->abis_queue);
+		wait = OBSC_NM_W_ACK_CB(msg);
+		_abis_nm_sendmsg(msg, 0);
+
+		if (wait)
+			break;
+	}
+
+	bts->abis_nm_pend = wait;
+}
+
+/* Receive a OML NM Message from BTS */
+static int abis_nm_rcvmsg_fom(struct msgb *mb)
+{
+	struct abis_om_hdr *oh = msgb_l2(mb);
+	struct abis_om_fom_hdr *foh = msgb_l3(mb);
+	u_int8_t mt = foh->msg_type;
+	int ret = 0;
+
+	/* check for unsolicited message */
+	if (is_report(mt))
+		return abis_nm_rcvmsg_report(mb);
+
+	if (is_in_arr(mt, sw_load_msgs, ARRAY_SIZE(sw_load_msgs)))
+		return abis_nm_rcvmsg_sw(mb);
+
+	if (is_in_arr(mt, nacks, ARRAY_SIZE(nacks))) {
+		struct nm_nack_signal_data nack_data;
+		struct tlv_parsed tp;
+
+		debugp_foh(foh);
+
+		DEBUGPC(DNM, "%s NACK ", get_value_string(nack_names, mt));
+
+		abis_nm_tlv_parse(&tp, mb->trx->bts, foh->data, oh->length-sizeof(*foh));
+		if (TLVP_PRESENT(&tp, NM_ATT_NACK_CAUSES))
+			DEBUGPC(DNM, "CAUSE=%s\n",
+				nack_cause_name(*TLVP_VAL(&tp, NM_ATT_NACK_CAUSES)));
+		else
+			DEBUGPC(DNM, "\n");
+
+		nack_data.msg = mb;
+		nack_data.mt = mt;
+		dispatch_signal(SS_NM, S_NM_NACK, &nack_data);
+		abis_nm_queue_send_next(mb->trx->bts);
+		return 0;
+	}
+#if 0
+	/* check if last message is to be acked */
+	if (is_ack_nack(nmh->last_msgtype)) {
+		if (mt == MT_ACK(nmh->last_msgtype)) {
+			DEBUGP(DNM, "received ACK (0x%x)\n", foh->msg_type);
+			/* we got our ACK, continue sending the next msg */
+		} else if (mt == MT_NACK(nmh->last_msgtype)) {
+			/* we got a NACK, signal this to the caller */
+			DEBUGP(DNM, "received NACK (0x%x)\n", foh->msg_type);
+			/* FIXME: somehow signal this to the caller */
+		} else {
+			/* really strange things happen */
+			return -EINVAL;
+		}
+	}
+#endif
+
+	switch (mt) {
+	case NM_MT_CHG_ADM_STATE_ACK:
+		ret = abis_nm_rx_chg_adm_state_ack(mb);
+		break;
+	case NM_MT_SW_ACT_REQ:
+		ret = abis_nm_rx_sw_act_req(mb);
+		break;
+	case NM_MT_BS11_LMT_SESSION:
+		ret = abis_nm_rx_lmt_event(mb);
+		break;
+	case NM_MT_CONN_MDROP_LINK_ACK:
+		DEBUGP(DNM, "CONN MDROP LINK ACK\n");
+		break;
+	case NM_MT_IPACC_RESTART_ACK:
+		dispatch_signal(SS_NM, S_NM_IPACC_RESTART_ACK, NULL);
+		break;
+	case NM_MT_IPACC_RESTART_NACK:
+		dispatch_signal(SS_NM, S_NM_IPACC_RESTART_NACK, NULL);
+		break;
+	case NM_MT_SET_BTS_ATTR_ACK:
+		/* The HSL wants an OPSTART _after_ the SI has been set */
+		if (mb->trx->bts->type == GSM_BTS_TYPE_HSL_FEMTO) {
+			abis_nm_opstart(mb->trx->bts, NM_OC_BTS, 255, 255, 255);
+		}
+		break;
+	}
+
+	abis_nm_queue_send_next(mb->trx->bts);
+	return ret;
+}
+
+static int abis_nm_rx_ipacc(struct msgb *mb);
+
+static int abis_nm_rcvmsg_manuf(struct msgb *mb)
+{
+	int rc;
+	int bts_type = mb->trx->bts->type;
+
+	switch (bts_type) {
+	case GSM_BTS_TYPE_NANOBTS:
+		rc = abis_nm_rx_ipacc(mb);
+		abis_nm_queue_send_next(mb->trx->bts);
+		break;
+	default:
+		LOGP(DNM, LOGL_ERROR, "don't know how to parse OML for this "
+		     "BTS type (%u)\n", bts_type);
+		rc = 0;
+		break;
+	}
+
+	return rc;
+}
+
+/* High-Level API */
+/* Entry-point where L2 OML from BTS enters the NM code */
+int abis_nm_rcvmsg(struct msgb *msg)
+{
+	struct abis_om_hdr *oh = msgb_l2(msg);
+	int rc = 0;
+
+	/* Various consistency checks */
+	if (oh->placement != ABIS_OM_PLACEMENT_ONLY) {
+		LOGP(DNM, LOGL_ERROR, "ABIS OML placement 0x%x not supported\n",
+			oh->placement);
+		if (oh->placement != ABIS_OM_PLACEMENT_FIRST)
+			return -EINVAL;
+	}
+	if (oh->sequence != 0) {
+		LOGP(DNM, LOGL_ERROR, "ABIS OML sequence 0x%x != 0x00\n",
+			oh->sequence);
+		return -EINVAL;
+	}
+#if 0
+	unsigned int l2_len = msg->tail - (u_int8_t *)msgb_l2(msg);
+	unsigned int hlen = sizeof(*oh) + sizeof(struct abis_om_fom_hdr);
+	if (oh->length + hlen > l2_len) {
+		LOGP(DNM, LOGL_ERROR, "ABIS OML truncated message (%u > %u)\n",
+			oh->length + sizeof(*oh), l2_len);
+		return -EINVAL;
+	}
+	if (oh->length + hlen < l2_len)
+		LOGP(DNM, LOGL_ERROR, "ABIS OML message with extra trailer?!? (oh->len=%d, sizeof_oh=%d l2_len=%d\n", oh->length, sizeof(*oh), l2_len);
+#endif
+	msg->l3h = (unsigned char *)oh + sizeof(*oh);
+
+	switch (oh->mdisc) {
+	case ABIS_OM_MDISC_FOM:
+		rc = abis_nm_rcvmsg_fom(msg);
+		break;
+	case ABIS_OM_MDISC_MANUF:
+		rc = abis_nm_rcvmsg_manuf(msg);
+		break;
+	case ABIS_OM_MDISC_MMI:
+	case ABIS_OM_MDISC_TRAU:
+		LOGP(DNM, LOGL_ERROR, "unimplemented ABIS OML message discriminator 0x%x\n",
+			oh->mdisc);
+		break;
+	default:
+		LOGP(DNM, LOGL_ERROR, "unknown ABIS OML message discriminator 0x%x\n",
+			oh->mdisc);
+		return -EINVAL;
+	}
+
+	msgb_free(msg);
+	return rc;
+}
+
+#if 0
+/* initialized all resources */
+struct abis_nm_h *abis_nm_init(struct abis_nm_cfg *cfg)
+{
+	struct abis_nm_h *nmh;
+
+	nmh = malloc(sizeof(*nmh));
+	if (!nmh)
+		return NULL;
+
+	nmh->cfg = cfg;
+
+	return nmh;
+}
+
+/* free all resources */
+void abis_nm_fini(struct abis_nm_h *nmh)
+{
+	free(nmh);
+}
+#endif
+
+/* Here we are trying to define a high-level API that can be used by
+ * the actual BSC implementation.  However, the architecture is currently
+ * still under design.  Ideally the calls to this API would be synchronous,
+ * while the underlying stack behind the APi runs in a traditional select
+ * based state machine.
+ */
+
+/* 6.2 Software Load: */
+enum sw_state {
+	SW_STATE_NONE,
+	SW_STATE_WAIT_INITACK,
+	SW_STATE_WAIT_SEGACK,
+	SW_STATE_WAIT_ENDACK,
+	SW_STATE_WAIT_ACTACK,
+	SW_STATE_ERROR,
+};
+
+struct abis_nm_sw {
+	struct gsm_bts *bts;
+	int trx_nr;
+	gsm_cbfn *cbfn;
+	void *cb_data;
+	int forced;
+
+	/* this will become part of the SW LOAD INITIATE */
+	u_int8_t obj_class;
+	u_int8_t obj_instance[3];
+
+	u_int8_t file_id[255];
+	u_int8_t file_id_len;
+
+	u_int8_t file_version[255];
+	u_int8_t file_version_len;
+
+	u_int8_t window_size;
+	u_int8_t seg_in_window;
+
+	int fd;
+	FILE *stream;
+	enum sw_state state;
+	int last_seg;
+};
+
+static struct abis_nm_sw g_sw;
+
+static void sw_add_file_id_and_ver(struct abis_nm_sw *sw, struct msgb *msg)
+{
+	if (sw->bts->type == GSM_BTS_TYPE_NANOBTS) {
+		msgb_v_put(msg, NM_ATT_SW_DESCR);
+		msgb_tl16v_put(msg, NM_ATT_FILE_ID, sw->file_id_len, sw->file_id);
+		msgb_tl16v_put(msg, NM_ATT_FILE_VERSION, sw->file_version_len,
+			       sw->file_version);
+	} else if (sw->bts->type == GSM_BTS_TYPE_BS11) {
+		msgb_tlv_put(msg, NM_ATT_FILE_ID, sw->file_id_len, sw->file_id);
+		msgb_tlv_put(msg, NM_ATT_FILE_VERSION, sw->file_version_len,
+			     sw->file_version);
+	} else {
+		LOGP(DNM, LOGL_ERROR, "Please implement this for the BTS.\n");
+	}
+}
+
+/* 6.2.1 / 8.3.1: Load Data Initiate */
+static int sw_load_init(struct abis_nm_sw *sw)
+{
+	struct abis_om_hdr *oh;
+	struct msgb *msg = nm_msgb_alloc();
+	u_int8_t len = 3*2 + sw->file_id_len + sw->file_version_len;
+
+	oh = (struct abis_om_hdr *) msgb_put(msg, ABIS_OM_FOM_HDR_SIZE);
+	fill_om_fom_hdr(oh, len, NM_MT_LOAD_INIT, sw->obj_class,
+			sw->obj_instance[0], sw->obj_instance[1],
+			sw->obj_instance[2]);
+
+	sw_add_file_id_and_ver(sw, msg);
+	msgb_tv_put(msg, NM_ATT_WINDOW_SIZE, sw->window_size);
+	
+	return abis_nm_sendmsg(sw->bts, msg);
+}
+
+static int is_last_line(FILE *stream)
+{
+	char next_seg_buf[256];
+	long pos;
+
+	/* check if we're sending the last line */
+	pos = ftell(stream);
+	if (!fgets(next_seg_buf, sizeof(next_seg_buf)-2, stream)) {
+		fseek(stream, pos, SEEK_SET);
+		return 1;
+	}
+
+	fseek(stream, pos, SEEK_SET);
+	return 0;
+}
+
+/* 6.2.2 / 8.3.2 Load Data Segment */
+static int sw_load_segment(struct abis_nm_sw *sw)
+{
+	struct abis_om_hdr *oh;
+	struct msgb *msg = nm_msgb_alloc();
+	char seg_buf[256];
+	char *line_buf = seg_buf+2;
+	unsigned char *tlv;
+	u_int8_t len;
+
+	oh = (struct abis_om_hdr *) msgb_put(msg, ABIS_OM_FOM_HDR_SIZE);
+
+	switch (sw->bts->type) {
+	case GSM_BTS_TYPE_BS11:
+		if (fgets(line_buf, sizeof(seg_buf)-2, sw->stream) == NULL) {
+			perror("fgets reading segment");
+			return -EINVAL;
+		}
+		seg_buf[0] = 0x00;
+
+		/* check if we're sending the last line */
+		sw->last_seg = is_last_line(sw->stream);
+		if (sw->last_seg)
+			seg_buf[1] = 0;
+		else
+			seg_buf[1] = 1 + sw->seg_in_window++;
+
+		len = strlen(line_buf) + 2;
+		tlv = msgb_put(msg, TLV_GROSS_LEN(len));
+		tlv_put(tlv, NM_ATT_BS11_FILE_DATA, len, (u_int8_t *)seg_buf);
+		/* BS11 wants CR + LF in excess of the TLV length !?! */
+		tlv[1] -= 2;
+
+		/* we only now know the exact length for the OM hdr */
+		len = strlen(line_buf)+2;
+		break;
+	case GSM_BTS_TYPE_NANOBTS: {
+		static_assert(sizeof(seg_buf) >= IPACC_SEGMENT_SIZE, buffer_big_enough);
+		len = read(sw->fd, &seg_buf, IPACC_SEGMENT_SIZE);
+		if (len < 0) {
+			perror("read failed");
+			return -EINVAL;
+		}
+
+		if (len != IPACC_SEGMENT_SIZE)
+			sw->last_seg = 1;
+
+		++sw->seg_in_window;
+		msgb_tl16v_put(msg, NM_ATT_IPACC_FILE_DATA, len, (const u_int8_t *) seg_buf);
+		len += 3;
+		break;
+	}
+	default:
+		LOGP(DNM, LOGL_ERROR, "sw_load_segment needs implementation for the BTS.\n");
+		/* FIXME: Other BTS types */
+		return -1;
+	}
+
+	fill_om_fom_hdr(oh, len, NM_MT_LOAD_SEG, sw->obj_class,
+			sw->obj_instance[0], sw->obj_instance[1],
+			sw->obj_instance[2]);
+
+	return abis_nm_sendmsg_direct(sw->bts, msg);
+}
+
+/* 6.2.4 / 8.3.4 Load Data End */
+static int sw_load_end(struct abis_nm_sw *sw)
+{
+	struct abis_om_hdr *oh;
+	struct msgb *msg = nm_msgb_alloc();
+	u_int8_t len = 2*2 + sw->file_id_len + sw->file_version_len;
+
+	oh = (struct abis_om_hdr *) msgb_put(msg, ABIS_OM_FOM_HDR_SIZE);
+	fill_om_fom_hdr(oh, len, NM_MT_LOAD_END, sw->obj_class,
+			sw->obj_instance[0], sw->obj_instance[1],
+			sw->obj_instance[2]);
+
+	sw_add_file_id_and_ver(sw, msg);
+	return abis_nm_sendmsg(sw->bts, msg);
+}
+
+/* Activate the specified software into the BTS */
+static int sw_activate(struct abis_nm_sw *sw)
+{
+	struct abis_om_hdr *oh;
+	struct msgb *msg = nm_msgb_alloc();
+	u_int8_t len = 2*2 + sw->file_id_len + sw->file_version_len;
+
+	oh = (struct abis_om_hdr *) msgb_put(msg, ABIS_OM_FOM_HDR_SIZE);
+	fill_om_fom_hdr(oh, len, NM_MT_ACTIVATE_SW, sw->obj_class,
+			sw->obj_instance[0], sw->obj_instance[1],
+			sw->obj_instance[2]);
+
+	/* FIXME: this is BS11 specific format */
+	msgb_tlv_put(msg, NM_ATT_FILE_ID, sw->file_id_len, sw->file_id);
+	msgb_tlv_put(msg, NM_ATT_FILE_VERSION, sw->file_version_len,
+		     sw->file_version);
+
+	return abis_nm_sendmsg(sw->bts, msg);
+}
+
+struct sdp_firmware {
+	char magic[4];
+	char more_magic[4];
+	unsigned int header_length;
+	unsigned int file_length;
+} __attribute__ ((packed));
+
+static int parse_sdp_header(struct abis_nm_sw *sw)
+{
+	struct sdp_firmware firmware_header;
+	int rc;
+	struct stat stat;
+
+	rc = read(sw->fd, &firmware_header, sizeof(firmware_header));
+	if (rc != sizeof(firmware_header)) {
+		LOGP(DNM, LOGL_ERROR, "Could not read SDP file header.\n");
+		return -1;
+	}
+
+	if (strncmp(firmware_header.magic, " SDP", 4) != 0) {
+		LOGP(DNM, LOGL_ERROR, "The magic number1 is wrong.\n");
+		return -1;
+	}
+
+	if (firmware_header.more_magic[0] != 0x10 ||
+	    firmware_header.more_magic[1] != 0x02 ||
+	    firmware_header.more_magic[2] != 0x00 ||
+	    firmware_header.more_magic[3] != 0x00) {
+		LOGP(DNM, LOGL_ERROR, "The more magic number is wrong.\n");
+		return -1;
+	}
+
+
+	if (fstat(sw->fd, &stat) == -1) {
+		LOGP(DNM, LOGL_ERROR, "Could not stat the file.\n");
+		return -1;
+	}
+
+	if (ntohl(firmware_header.file_length) != stat.st_size) {
+		LOGP(DNM, LOGL_ERROR, "The filesizes do not match.\n");
+		return -1;
+	}
+
+	/* go back to the start as we checked the whole filesize.. */
+	lseek(sw->fd, 0l, SEEK_SET);
+	LOGP(DNM, LOGL_NOTICE, "The ipaccess SDP header is not fully understood.\n"
+			       "There might be checksums in the file that are not\n"
+			       "verified and incomplete firmware might be flashed.\n"
+			       "There is absolutely no WARRANTY that flashing will\n"
+			       "work.\n");
+	return 0;
+}
+
+static int sw_open_file(struct abis_nm_sw *sw, const char *fname)
+{
+	char file_id[12+1];
+	char file_version[80+1];
+	int rc;
+
+	sw->fd = open(fname, O_RDONLY);
+	if (sw->fd < 0)
+		return sw->fd;
+
+	switch (sw->bts->type) {
+	case GSM_BTS_TYPE_BS11:
+		sw->stream = fdopen(sw->fd, "r");
+		if (!sw->stream) {
+			perror("fdopen");
+			return -1;
+		}
+		/* read first line and parse file ID and VERSION */
+		rc = fscanf(sw->stream, "@(#)%12s:%80s\r\n",
+			    file_id, file_version);
+		if (rc != 2) {
+			perror("parsing header line of software file");
+			return -1;
+		}
+		strcpy((char *)sw->file_id, file_id);
+		sw->file_id_len = strlen(file_id);
+		strcpy((char *)sw->file_version, file_version);
+		sw->file_version_len = strlen(file_version);
+		/* rewind to start of file */
+		rewind(sw->stream);
+		break;	
+	case GSM_BTS_TYPE_NANOBTS:
+		/* TODO: extract that from the filename or content */
+		rc = parse_sdp_header(sw);
+		if (rc < 0) {
+			fprintf(stderr, "Could not parse the ipaccess SDP header\n");
+			return -1;
+		}
+
+		strcpy((char *)sw->file_id, "id");
+		sw->file_id_len = 3;
+		strcpy((char *)sw->file_version, "version");
+		sw->file_version_len = 8;
+		break;
+	default:
+		/* We don't know how to treat them yet */
+		close(sw->fd);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+	
+static void sw_close_file(struct abis_nm_sw *sw)
+{
+	switch (sw->bts->type) {
+	case GSM_BTS_TYPE_BS11:
+		fclose(sw->stream);
+		break;
+	default:
+		close(sw->fd);
+		break;
+	}
+}
+
+/* Fill the window */
+static int sw_fill_window(struct abis_nm_sw *sw)
+{
+	int rc;
+
+	while (sw->seg_in_window < sw->window_size) {
+		rc = sw_load_segment(sw);
+		if (rc < 0)
+			return rc;
+		if (sw->last_seg)
+			break;
+	}
+	return 0;
+}
+
+/* callback function from abis_nm_rcvmsg() handler */
+static int abis_nm_rcvmsg_sw(struct msgb *mb)
+{
+	struct abis_om_fom_hdr *foh = msgb_l3(mb);
+	int rc = -1;
+	struct abis_nm_sw *sw = &g_sw;
+	enum sw_state old_state = sw->state;
+	
+	//DEBUGP(DNM, "state %u, NM MT 0x%02x\n", sw->state, foh->msg_type);
+
+	switch (sw->state) {
+	case SW_STATE_WAIT_INITACK:
+		switch (foh->msg_type) {
+		case NM_MT_LOAD_INIT_ACK:
+			/* fill window with segments */
+			if (sw->cbfn)
+				sw->cbfn(GSM_HOOK_NM_SWLOAD,
+					 NM_MT_LOAD_INIT_ACK, mb,
+					 sw->cb_data, NULL);
+			rc = sw_fill_window(sw);
+			sw->state = SW_STATE_WAIT_SEGACK;
+			abis_nm_queue_send_next(mb->trx->bts);
+			break;
+		case NM_MT_LOAD_INIT_NACK:
+			if (sw->forced) {
+				DEBUGP(DNM, "FORCED: Ignoring Software Load "
+					"Init NACK\n");
+				if (sw->cbfn)
+					sw->cbfn(GSM_HOOK_NM_SWLOAD,
+						 NM_MT_LOAD_INIT_ACK, mb,
+						 sw->cb_data, NULL);
+				rc = sw_fill_window(sw);
+				sw->state = SW_STATE_WAIT_SEGACK;
+			} else {
+				DEBUGP(DNM, "Software Load Init NACK\n");
+				/* FIXME: cause */
+				if (sw->cbfn)
+					sw->cbfn(GSM_HOOK_NM_SWLOAD,
+						 NM_MT_LOAD_INIT_NACK, mb,
+						 sw->cb_data, NULL);
+				sw->state = SW_STATE_ERROR;
+			}
+			abis_nm_queue_send_next(mb->trx->bts);
+			break;
+		}
+		break;
+	case SW_STATE_WAIT_SEGACK:
+		switch (foh->msg_type) {
+		case NM_MT_LOAD_SEG_ACK:
+			if (sw->cbfn)
+				sw->cbfn(GSM_HOOK_NM_SWLOAD,
+					 NM_MT_LOAD_SEG_ACK, mb,
+					 sw->cb_data, NULL);
+			sw->seg_in_window = 0;
+			if (!sw->last_seg) {
+				/* fill window with more segments */
+				rc = sw_fill_window(sw);
+				sw->state = SW_STATE_WAIT_SEGACK;
+			} else {
+				/* end the transfer */
+				sw->state = SW_STATE_WAIT_ENDACK;
+				rc = sw_load_end(sw);
+			}
+			abis_nm_queue_send_next(mb->trx->bts);
+			break;
+		case NM_MT_LOAD_ABORT:
+			if (sw->cbfn)
+				sw->cbfn(GSM_HOOK_NM_SWLOAD,
+					 NM_MT_LOAD_ABORT, mb,
+					 sw->cb_data, NULL);
+			break;
+		}
+		break;
+	case SW_STATE_WAIT_ENDACK:
+		switch (foh->msg_type) {
+		case NM_MT_LOAD_END_ACK:
+			sw_close_file(sw);
+			DEBUGP(DNM, "Software Load End (BTS %u)\n",
+				sw->bts->nr);
+			sw->state = SW_STATE_NONE;
+			if (sw->cbfn)
+				sw->cbfn(GSM_HOOK_NM_SWLOAD,
+					 NM_MT_LOAD_END_ACK, mb,
+					 sw->cb_data, NULL);
+			rc = 0;
+			abis_nm_queue_send_next(mb->trx->bts);
+			break;
+		case NM_MT_LOAD_END_NACK:
+			if (sw->forced) {
+				DEBUGP(DNM, "FORCED: Ignoring Software Load"
+					"End NACK\n");
+				sw->state = SW_STATE_NONE;
+				if (sw->cbfn)
+					sw->cbfn(GSM_HOOK_NM_SWLOAD,
+						 NM_MT_LOAD_END_ACK, mb,
+						 sw->cb_data, NULL);
+			} else {
+				DEBUGP(DNM, "Software Load End NACK\n");
+				/* FIXME: cause */
+				sw->state = SW_STATE_ERROR;
+				if (sw->cbfn)
+					sw->cbfn(GSM_HOOK_NM_SWLOAD,
+						 NM_MT_LOAD_END_NACK, mb,
+						 sw->cb_data, NULL);
+			}
+			abis_nm_queue_send_next(mb->trx->bts);
+			break;
+		}
+	case SW_STATE_WAIT_ACTACK:
+		switch (foh->msg_type) {
+		case NM_MT_ACTIVATE_SW_ACK:
+			/* we're done */
+			DEBUGP(DNM, "Activate Software DONE!\n");
+			sw->state = SW_STATE_NONE;
+			rc = 0;
+			if (sw->cbfn)
+				sw->cbfn(GSM_HOOK_NM_SWLOAD,
+					 NM_MT_ACTIVATE_SW_ACK, mb,
+					 sw->cb_data, NULL);
+			abis_nm_queue_send_next(mb->trx->bts);
+			break;
+		case NM_MT_ACTIVATE_SW_NACK:
+			DEBUGP(DNM, "Activate Software NACK\n");
+			/* FIXME: cause */
+			sw->state = SW_STATE_ERROR;
+			if (sw->cbfn)
+				sw->cbfn(GSM_HOOK_NM_SWLOAD,
+					 NM_MT_ACTIVATE_SW_NACK, mb,
+					 sw->cb_data, NULL);
+			abis_nm_queue_send_next(mb->trx->bts);
+			break;
+		}
+	case SW_STATE_NONE:
+		switch (foh->msg_type) {
+		case NM_MT_ACTIVATE_SW_ACK:
+			rc = 0;
+			break;
+		}
+		break;
+	case SW_STATE_ERROR:
+		break;
+	}
+
+	if (rc)
+		DEBUGP(DNM, "unexpected NM MT 0x%02x in state %u -> %u\n",
+			foh->msg_type, old_state, sw->state);
+
+	return rc;
+}
+
+/* Load the specified software into the BTS */
+int abis_nm_software_load(struct gsm_bts *bts, int trx_nr, const char *fname,
+			  u_int8_t win_size, int forced,
+			  gsm_cbfn *cbfn, void *cb_data)
+{
+	struct abis_nm_sw *sw = &g_sw;
+	int rc;
+
+	DEBUGP(DNM, "Software Load (BTS %u, File \"%s\")\n",
+		bts->nr, fname);
+
+	if (sw->state != SW_STATE_NONE)
+		return -EBUSY;
+
+	sw->bts = bts;
+	sw->trx_nr = trx_nr;
+
+	switch (bts->type) {
+	case GSM_BTS_TYPE_BS11:
+		sw->obj_class = NM_OC_SITE_MANAGER;
+		sw->obj_instance[0] = 0xff;
+		sw->obj_instance[1] = 0xff;
+		sw->obj_instance[2] = 0xff;
+		break;
+	case GSM_BTS_TYPE_NANOBTS:
+		sw->obj_class = NM_OC_BASEB_TRANSC;
+		sw->obj_instance[0] = sw->bts->nr;
+		sw->obj_instance[1] = sw->trx_nr;
+		sw->obj_instance[2] = 0xff;
+		break;
+	case GSM_BTS_TYPE_UNKNOWN:
+	default:
+		LOGPC(DNM, LOGL_ERROR, "Software Load not properly implemented.\n");
+		return -1;
+		break;
+	}
+	sw->window_size = win_size;
+	sw->state = SW_STATE_WAIT_INITACK;
+	sw->cbfn = cbfn;
+	sw->cb_data = cb_data;
+	sw->forced = forced;
+
+	rc = sw_open_file(sw, fname);
+	if (rc < 0) {
+		sw->state = SW_STATE_NONE;
+		return rc;
+	}
+
+	return sw_load_init(sw);
+}
+
+int abis_nm_software_load_status(struct gsm_bts *bts)
+{
+	struct abis_nm_sw *sw = &g_sw;
+	struct stat st;
+	int rc, percent;
+
+	rc = fstat(sw->fd, &st);
+	if (rc < 0) {
+		perror("ERROR during stat");
+		return rc;
+	}
+
+	if (sw->stream)
+		percent = (ftell(sw->stream) * 100) / st.st_size;
+	else
+		percent = (lseek(sw->fd, 0, SEEK_CUR) * 100) / st.st_size;
+	return percent;
+}
+
+/* Activate the specified software into the BTS */
+int abis_nm_software_activate(struct gsm_bts *bts, const char *fname,
+			      gsm_cbfn *cbfn, void *cb_data)
+{
+	struct abis_nm_sw *sw = &g_sw;
+	int rc;
+
+	DEBUGP(DNM, "Activating Software (BTS %u, File \"%s\")\n",
+		bts->nr, fname);
+
+	if (sw->state != SW_STATE_NONE)
+		return -EBUSY;
+
+	sw->bts = bts;
+	sw->obj_class = NM_OC_SITE_MANAGER;
+	sw->obj_instance[0] = 0xff;
+	sw->obj_instance[1] = 0xff;
+	sw->obj_instance[2] = 0xff;
+	sw->state = SW_STATE_WAIT_ACTACK;
+	sw->cbfn = cbfn;
+	sw->cb_data = cb_data;
+
+	/* Open the file in order to fill some sw struct members */
+	rc = sw_open_file(sw, fname);
+	if (rc < 0) {
+		sw->state = SW_STATE_NONE;
+		return rc;
+	}
+	sw_close_file(sw);
+
+	return sw_activate(sw);
+}
+
+static void fill_nm_channel(struct abis_nm_channel *ch, u_int8_t bts_port,
+		       u_int8_t ts_nr, u_int8_t subslot_nr)
+{
+	ch->attrib = NM_ATT_ABIS_CHANNEL;
+	ch->bts_port = bts_port;
+	ch->timeslot = ts_nr;
+	ch->subslot = subslot_nr;	
+}
+
+int abis_nm_establish_tei(struct gsm_bts *bts, u_int8_t trx_nr,
+			  u_int8_t e1_port, u_int8_t e1_timeslot, u_int8_t e1_subslot,
+			  u_int8_t tei)
+{
+	struct abis_om_hdr *oh;
+	struct abis_nm_channel *ch;
+	u_int8_t len = sizeof(*ch) + 2;
+	struct msgb *msg = nm_msgb_alloc();
+
+	oh = (struct abis_om_hdr *) msgb_put(msg, ABIS_OM_FOM_HDR_SIZE);
+	fill_om_fom_hdr(oh, len, NM_MT_ESTABLISH_TEI, NM_OC_RADIO_CARRIER,
+			bts->bts_nr, trx_nr, 0xff);
+	
+	msgb_tv_put(msg, NM_ATT_TEI, tei);
+
+	ch = (struct abis_nm_channel *) msgb_put(msg, sizeof(*ch));
+	fill_nm_channel(ch, e1_port, e1_timeslot, e1_subslot);
+
+	return abis_nm_sendmsg(bts, msg);
+}
+
+/* connect signalling of one (BTS,TRX) to a particular timeslot on the E1 */
+int abis_nm_conn_terr_sign(struct gsm_bts_trx *trx,
+			   u_int8_t e1_port, u_int8_t e1_timeslot, u_int8_t e1_subslot)
+{
+	struct gsm_bts *bts = trx->bts;
+	struct abis_om_hdr *oh;
+	struct abis_nm_channel *ch;
+	struct msgb *msg = nm_msgb_alloc();
+
+	oh = (struct abis_om_hdr *) msgb_put(msg, ABIS_OM_FOM_HDR_SIZE);
+	fill_om_fom_hdr(oh, sizeof(*ch), NM_MT_CONN_TERR_SIGN,
+			NM_OC_RADIO_CARRIER, bts->bts_nr, trx->nr, 0xff);
+	
+	ch = (struct abis_nm_channel *) msgb_put(msg, sizeof(*ch));
+	fill_nm_channel(ch, e1_port, e1_timeslot, e1_subslot);
+
+	return abis_nm_sendmsg(bts, msg);
+}
+
+#if 0
+int abis_nm_disc_terr_sign(struct abis_nm_h *h, struct abis_om_obj_inst *inst,
+			   struct abis_nm_abis_channel *chan)
+{
+}
+#endif
+
+int abis_nm_conn_terr_traf(struct gsm_bts_trx_ts *ts,
+			   u_int8_t e1_port, u_int8_t e1_timeslot,
+			   u_int8_t e1_subslot)
+{
+	struct gsm_bts *bts = ts->trx->bts;
+	struct abis_om_hdr *oh;
+	struct abis_nm_channel *ch;
+	struct msgb *msg = nm_msgb_alloc();
+
+	oh = (struct abis_om_hdr *) msgb_put(msg, ABIS_OM_FOM_HDR_SIZE);
+	fill_om_fom_hdr(oh, sizeof(*ch), NM_MT_CONN_TERR_TRAF,
+			NM_OC_CHANNEL, bts->bts_nr, ts->trx->nr, ts->nr);
+
+	ch = (struct abis_nm_channel *) msgb_put(msg, sizeof(*ch));
+	fill_nm_channel(ch, e1_port, e1_timeslot, e1_subslot);
+
+	DEBUGP(DNM, "CONNECT TERR TRAF Um=%s E1=(%u,%u,%u)\n",
+		gsm_ts_name(ts),
+		e1_port, e1_timeslot, e1_subslot);
+
+	return abis_nm_sendmsg(bts, msg);
+}
+
+#if 0
+int abis_nm_disc_terr_traf(struct abis_nm_h *h, struct abis_om_obj_inst *inst,
+			   struct abis_nm_abis_channel *chan,
+			   u_int8_t subchan)
+{
+}
+#endif
+
+/* Chapter 8.6.1 */
+int abis_nm_set_bts_attr(struct gsm_bts *bts, u_int8_t *attr, int attr_len)
+{
+	struct abis_om_hdr *oh;
+	struct msgb *msg = nm_msgb_alloc();
+	u_int8_t *cur;
+
+	DEBUGP(DNM, "Set BTS Attr (bts=%d)\n", bts->nr);
+
+	oh = (struct abis_om_hdr *) msgb_put(msg, ABIS_OM_FOM_HDR_SIZE);
+	fill_om_fom_hdr(oh, attr_len, NM_MT_SET_BTS_ATTR, NM_OC_BTS, bts->bts_nr, 0xff, 0xff);
+	cur = msgb_put(msg, attr_len);
+	memcpy(cur, attr, attr_len);
+
+	return abis_nm_sendmsg(bts, msg);
+}
+
+/* Chapter 8.6.2 */
+int abis_nm_set_radio_attr(struct gsm_bts_trx *trx, u_int8_t *attr, int attr_len)
+{
+	struct abis_om_hdr *oh;
+	struct msgb *msg = nm_msgb_alloc();
+	u_int8_t *cur;
+
+	DEBUGP(DNM, "Set TRX Attr (bts=%d,trx=%d)\n", trx->bts->nr, trx->nr);
+
+	oh = (struct abis_om_hdr *) msgb_put(msg, ABIS_OM_FOM_HDR_SIZE);
+	fill_om_fom_hdr(oh, attr_len, NM_MT_SET_RADIO_ATTR, NM_OC_RADIO_CARRIER,
+			trx->bts->bts_nr, trx->nr, 0xff);
+	cur = msgb_put(msg, attr_len);
+	memcpy(cur, attr, attr_len);
+
+	return abis_nm_sendmsg(trx->bts, msg);
+}
+
+static int verify_chan_comb(struct gsm_bts_trx_ts *ts, u_int8_t chan_comb)
+{
+	int i;
+
+	/* As it turns out, the BS-11 has some very peculiar restrictions
+	 * on the channel combinations it allows */
+	switch (ts->trx->bts->type) {
+	case GSM_BTS_TYPE_BS11:
+		switch (chan_comb) {
+		case NM_CHANC_TCHHalf:
+		case NM_CHANC_TCHHalf2:
+			/* not supported */
+			return -EINVAL;
+		case NM_CHANC_SDCCH:
+			/* only one SDCCH/8 per TRX */
+			for (i = 0; i < TRX_NR_TS; i++) {
+				if (i == ts->nr)
+					continue;
+				if (ts->trx->ts[i].nm_chan_comb ==
+				    NM_CHANC_SDCCH)
+					return -EINVAL;
+			}
+			/* not allowed for TS0 of BCCH-TRX */
+			if (ts->trx == ts->trx->bts->c0 &&
+			    ts->nr == 0)
+					return -EINVAL;
+			/* not on the same TRX that has a BCCH+SDCCH4
+			 * combination */
+			if (ts->trx == ts->trx->bts->c0 &&
+			    (ts->trx->ts[0].nm_chan_comb == 5 ||
+			     ts->trx->ts[0].nm_chan_comb == 8))
+					return -EINVAL;
+			break;
+		case NM_CHANC_mainBCCH:
+		case NM_CHANC_BCCHComb:
+			/* allowed only for TS0 of C0 */
+			if (ts->trx != ts->trx->bts->c0 ||
+			    ts->nr != 0)
+				return -EINVAL;
+			break;
+		case NM_CHANC_BCCH:
+			/* allowed only for TS 2/4/6 of C0 */
+			if (ts->trx != ts->trx->bts->c0)
+				return -EINVAL;
+			if (ts->nr != 2 && ts->nr != 4 &&
+			    ts->nr != 6)
+				return -EINVAL;
+			break;
+		case 8: /* this is not like 08.58, but in fact
+			 * FCCH+SCH+BCCH+CCCH+SDCCH/4+SACCH/C4+CBCH */
+			/* FIXME: only one CBCH allowed per cell */
+			break;
+		}
+		break;
+	case GSM_BTS_TYPE_NANOBTS:
+		switch (ts->nr) {
+		case 0:
+			if (ts->trx->nr == 0) {
+				/* only on TRX0 */
+				switch (chan_comb) {
+				case NM_CHANC_BCCH:
+				case NM_CHANC_mainBCCH:
+				case NM_CHANC_BCCHComb:
+					return 0;
+					break;
+				default:
+					return -EINVAL;
+				}
+			} else {
+				switch (chan_comb) {
+				case NM_CHANC_TCHFull:
+				case NM_CHANC_TCHHalf:
+				case NM_CHANC_IPAC_TCHFull_TCHHalf:
+					return 0;
+				default:
+					return -EINVAL;
+				}
+			}
+			break;
+		case 1:
+			if (ts->trx->nr == 0) {
+				switch (chan_comb) {
+				case NM_CHANC_SDCCH_CBCH:
+					if (ts->trx->ts[0].nm_chan_comb ==
+					    NM_CHANC_mainBCCH)
+						return 0;
+					return -EINVAL;
+				case NM_CHANC_SDCCH:
+				case NM_CHANC_TCHFull:
+				case NM_CHANC_TCHHalf:
+				case NM_CHANC_IPAC_TCHFull_TCHHalf:
+				case NM_CHANC_IPAC_TCHFull_PDCH:
+					return 0;
+				}
+			} else {
+				switch (chan_comb) {
+				case NM_CHANC_SDCCH:
+				case NM_CHANC_TCHFull:
+				case NM_CHANC_TCHHalf:
+				case NM_CHANC_IPAC_TCHFull_TCHHalf:
+					return 0;
+				default:
+					return -EINVAL;
+				}
+			}
+			break;
+		case 2:
+		case 3:
+		case 4:
+		case 5:
+		case 6:
+		case 7:
+			switch (chan_comb) {
+			case NM_CHANC_TCHFull:
+			case NM_CHANC_TCHHalf:
+			case NM_CHANC_IPAC_TCHFull_TCHHalf:
+				return 0;
+			case NM_CHANC_IPAC_PDCH:
+			case NM_CHANC_IPAC_TCHFull_PDCH:
+				if (ts->trx->nr == 0)
+					return 0;
+				else
+					return -EINVAL;
+			}
+			break;
+		}
+		return -EINVAL;
+	default:
+		/* unknown BTS type */
+		return 0;
+	}
+	return 0;
+}
+
+/* Chapter 8.6.3 */
+int abis_nm_set_channel_attr(struct gsm_bts_trx_ts *ts, u_int8_t chan_comb)
+{
+	struct gsm_bts *bts = ts->trx->bts;
+	struct abis_om_hdr *oh;
+	u_int8_t zero = 0x00;
+	struct msgb *msg = nm_msgb_alloc();
+	u_int8_t len = 2 + 2;
+
+	if (bts->type == GSM_BTS_TYPE_BS11)
+		len += 4 + 2 + 2 + 3;
+
+	DEBUGP(DNM, "Set Chan Attr %s\n", gsm_ts_name(ts));
+	if (verify_chan_comb(ts, chan_comb) < 0) {
+		msgb_free(msg);
+		DEBUGP(DNM, "Invalid Channel Combination!!!\n");
+		return -EINVAL;
+	}
+	ts->nm_chan_comb = chan_comb;
+
+	oh = (struct abis_om_hdr *) msgb_put(msg, ABIS_OM_FOM_HDR_SIZE);
+	fill_om_fom_hdr(oh, len, NM_MT_SET_CHAN_ATTR,
+			NM_OC_CHANNEL, bts->bts_nr,
+			ts->trx->nr, ts->nr);
+	msgb_tv_put(msg, NM_ATT_CHAN_COMB, chan_comb);
+	if (ts->hopping.enabled) {
+		unsigned int i;
+		uint8_t *len;
+
+		msgb_tv_put(msg, NM_ATT_HSN, ts->hopping.hsn);
+		msgb_tv_put(msg, NM_ATT_MAIO, ts->hopping.maio);
+
+		/* build the ARFCN list */
+		msgb_put_u8(msg, NM_ATT_ARFCN_LIST);
+		len = msgb_put(msg, 1);
+		*len = 0;
+		for (i = 0; i < ts->hopping.arfcns.data_len*8; i++) {
+			if (bitvec_get_bit_pos(&ts->hopping.arfcns, i)) {
+				msgb_put_u16(msg, i);
+				/* At least BS-11 wants a TLV16 here */
+				if (bts->type == GSM_BTS_TYPE_BS11)
+					*len += 1;
+				else
+					*len += sizeof(uint16_t);
+			}
+		}
+	}
+	msgb_tv_put(msg, NM_ATT_TSC, bts->tsc);	/* training sequence */
+	if (bts->type == GSM_BTS_TYPE_BS11)
+		msgb_tlv_put(msg, 0x59, 1, &zero);
+
+	return abis_nm_sendmsg(bts, msg);
+}
+
+int abis_nm_sw_act_req_ack(struct gsm_bts *bts, u_int8_t obj_class, u_int8_t i1,
+			u_int8_t i2, u_int8_t i3, int nack, u_int8_t *attr, int att_len)
+{
+	struct abis_om_hdr *oh;
+	struct msgb *msg = nm_msgb_alloc();
+	u_int8_t msgtype = NM_MT_SW_ACT_REQ_ACK;
+	u_int8_t len = att_len;
+
+	if (nack) {
+		len += 2;
+		msgtype = NM_MT_SW_ACT_REQ_NACK;
+	}
+
+	oh = (struct abis_om_hdr *) msgb_put(msg, ABIS_OM_FOM_HDR_SIZE);
+	fill_om_fom_hdr(oh, att_len, msgtype, obj_class, i1, i2, i3);
+
+	if (attr) {
+		u_int8_t *ptr = msgb_put(msg, att_len);
+		memcpy(ptr, attr, att_len);
+	}
+	if (nack)
+		msgb_tv_put(msg, NM_ATT_NACK_CAUSES, NM_NACK_OBJCLASS_NOTSUPP);
+
+	return abis_nm_sendmsg_direct(bts, msg);
+}
+
+int abis_nm_raw_msg(struct gsm_bts *bts, int len, u_int8_t *rawmsg)
+{
+	struct msgb *msg = nm_msgb_alloc();
+	struct abis_om_hdr *oh;
+	u_int8_t *data;
+
+	oh = (struct abis_om_hdr *) msgb_put(msg, sizeof(*oh));
+	fill_om_hdr(oh, len);
+	data = msgb_put(msg, len);
+	memcpy(data, rawmsg, len);
+
+	return abis_nm_sendmsg(bts, msg);
+}
+
+/* Siemens specific commands */
+static int __simple_cmd(struct gsm_bts *bts, u_int8_t msg_type)
+{
+	struct abis_om_hdr *oh;
+	struct msgb *msg = nm_msgb_alloc();
+
+	oh = (struct abis_om_hdr *) msgb_put(msg, ABIS_OM_FOM_HDR_SIZE);
+	fill_om_fom_hdr(oh, 0, msg_type, NM_OC_SITE_MANAGER,
+			0xff, 0xff, 0xff);
+
+	return abis_nm_sendmsg(bts, msg);
+}
+
+/* Chapter 8.9.2 */
+int abis_nm_opstart(struct gsm_bts *bts, u_int8_t obj_class, u_int8_t i0, u_int8_t i1, u_int8_t i2)
+{
+	struct abis_om_hdr *oh;
+	struct msgb *msg = nm_msgb_alloc();
+
+	oh = (struct abis_om_hdr *) msgb_put(msg, ABIS_OM_FOM_HDR_SIZE);
+	fill_om_fom_hdr(oh, 0, NM_MT_OPSTART, obj_class, i0, i1, i2);
+
+	debugp_foh((struct abis_om_fom_hdr *) oh->data);
+	DEBUGPC(DNM, "Sending OPSTART\n");
+
+	return abis_nm_sendmsg(bts, msg);
+}
+
+/* Chapter 8.8.5 */
+int abis_nm_chg_adm_state(struct gsm_bts *bts, u_int8_t obj_class, u_int8_t i0,
+			  u_int8_t i1, u_int8_t i2, enum abis_nm_adm_state adm_state)
+{
+	struct abis_om_hdr *oh;
+	struct msgb *msg = nm_msgb_alloc();
+
+	oh = (struct abis_om_hdr *) msgb_put(msg, ABIS_OM_FOM_HDR_SIZE);
+	fill_om_fom_hdr(oh, 2, NM_MT_CHG_ADM_STATE, obj_class, i0, i1, i2);
+	msgb_tv_put(msg, NM_ATT_ADM_STATE, adm_state);
+
+	return abis_nm_sendmsg(bts, msg);
+}
+
+int abis_nm_conn_mdrop_link(struct gsm_bts *bts, u_int8_t e1_port0, u_int8_t ts0,
+			    u_int8_t e1_port1, u_int8_t ts1)
+{
+	struct abis_om_hdr *oh;
+	struct msgb *msg = nm_msgb_alloc();
+	u_int8_t *attr;
+
+	DEBUGP(DNM, "CONNECT MDROP LINK E1=(%u,%u) -> E1=(%u, %u)\n",
+		e1_port0, ts0, e1_port1, ts1);
+
+	oh = (struct abis_om_hdr *) msgb_put(msg, ABIS_OM_FOM_HDR_SIZE);
+	fill_om_fom_hdr(oh, 6, NM_MT_CONN_MDROP_LINK,
+			NM_OC_SITE_MANAGER, 0x00, 0x00, 0x00);
+
+	attr = msgb_put(msg, 3);
+	attr[0] = NM_ATT_MDROP_LINK;
+	attr[1] = e1_port0;
+	attr[2] = ts0;
+
+	attr = msgb_put(msg, 3);
+	attr[0] = NM_ATT_MDROP_NEXT;
+	attr[1] = e1_port1;
+	attr[2] = ts1;
+
+	return abis_nm_sendmsg(bts, msg);
+}
+
+/* Chapter 8.7.1 */
+int abis_nm_perform_test(struct gsm_bts *bts, u_int8_t obj_class,
+			 u_int8_t bts_nr, u_int8_t trx_nr, u_int8_t ts_nr,
+			 u_int8_t test_nr, u_int8_t auton_report, struct msgb *msg)
+{
+	struct abis_om_hdr *oh;
+
+	DEBUGP(DNM, "PEFORM TEST %s\n", get_value_string(test_names, test_nr));
+
+	if (!msg)
+		msg = nm_msgb_alloc();
+
+	msgb_tv_push(msg, NM_ATT_AUTON_REPORT, auton_report);
+	msgb_tv_push(msg, NM_ATT_TEST_NO, test_nr);
+	oh = (struct abis_om_hdr *) msgb_push(msg, ABIS_OM_FOM_HDR_SIZE);
+	fill_om_fom_hdr(oh, msgb_l3len(msg), NM_MT_PERF_TEST,
+			obj_class, bts_nr, trx_nr, ts_nr);
+
+	return abis_nm_sendmsg(bts, msg);
+}
+
+int abis_nm_event_reports(struct gsm_bts *bts, int on)
+{
+	if (on == 0)
+		return __simple_cmd(bts, NM_MT_STOP_EVENT_REP);
+	else
+		return __simple_cmd(bts, NM_MT_REST_EVENT_REP);
+}
+
+/* Siemens (or BS-11) specific commands */
+
+int abis_nm_bs11_bsc_disconnect(struct gsm_bts *bts, int reconnect)
+{
+	if (reconnect == 0)
+		return __simple_cmd(bts, NM_MT_BS11_DISCONNECT);
+	else
+		return __simple_cmd(bts, NM_MT_BS11_RECONNECT);
+}
+
+int abis_nm_bs11_restart(struct gsm_bts *bts)
+{
+	return __simple_cmd(bts, NM_MT_BS11_RESTART);
+}
+
+
+struct bs11_date_time {
+	u_int16_t	year;
+	u_int8_t	month;
+	u_int8_t	day;
+	u_int8_t	hour;
+	u_int8_t	min;
+	u_int8_t	sec;
+} __attribute__((packed));
+
+
+void get_bs11_date_time(struct bs11_date_time *aet)
+{
+	time_t t;
+	struct tm *tm;
+
+	t = time(NULL);
+	tm = localtime(&t);
+	aet->sec = tm->tm_sec;
+	aet->min = tm->tm_min;
+	aet->hour = tm->tm_hour;
+	aet->day = tm->tm_mday;
+	aet->month = tm->tm_mon;
+	aet->year = htons(1900 + tm->tm_year);
+}
+
+int abis_nm_bs11_reset_resource(struct gsm_bts *bts)
+{
+	return __simple_cmd(bts, NM_MT_BS11_RESET_RESOURCE);
+}
+
+int abis_nm_bs11_db_transmission(struct gsm_bts *bts, int begin)
+{
+	if (begin)
+		return __simple_cmd(bts, NM_MT_BS11_BEGIN_DB_TX);
+	else
+		return __simple_cmd(bts, NM_MT_BS11_END_DB_TX);
+}
+
+int abis_nm_bs11_create_object(struct gsm_bts *bts,
+				enum abis_bs11_objtype type, u_int8_t idx,
+				u_int8_t attr_len, const u_int8_t *attr)
+{
+	struct abis_om_hdr *oh;
+	struct msgb *msg = nm_msgb_alloc();
+	u_int8_t *cur;
+
+	oh = (struct abis_om_hdr *) msgb_put(msg, ABIS_OM_FOM_HDR_SIZE);
+	fill_om_fom_hdr(oh, attr_len, NM_MT_BS11_CREATE_OBJ,
+			NM_OC_BS11, type, 0, idx);
+	cur = msgb_put(msg, attr_len);
+	memcpy(cur, attr, attr_len);
+
+	return abis_nm_sendmsg(bts, msg);
+}
+
+int abis_nm_bs11_delete_object(struct gsm_bts *bts,
+				enum abis_bs11_objtype type, u_int8_t idx)
+{
+	struct abis_om_hdr *oh;
+	struct msgb *msg = nm_msgb_alloc();
+
+	oh = (struct abis_om_hdr *) msgb_put(msg, ABIS_OM_FOM_HDR_SIZE);
+	fill_om_fom_hdr(oh, 0, NM_MT_BS11_DELETE_OBJ,
+			NM_OC_BS11, type, 0, idx);
+
+	return abis_nm_sendmsg(bts, msg);
+}
+
+int abis_nm_bs11_create_envaBTSE(struct gsm_bts *bts, u_int8_t idx)
+{
+	struct abis_om_hdr *oh;
+	struct msgb *msg = nm_msgb_alloc();
+	u_int8_t zero = 0x00;
+
+	oh = (struct abis_om_hdr *) msgb_put(msg, ABIS_OM_FOM_HDR_SIZE);
+	fill_om_fom_hdr(oh, 3, NM_MT_BS11_CREATE_OBJ,
+			NM_OC_BS11_ENVABTSE, 0, idx, 0xff);
+	msgb_tlv_put(msg, 0x99, 1, &zero);
+
+	return abis_nm_sendmsg(bts, msg);
+}
+
+int abis_nm_bs11_create_bport(struct gsm_bts *bts, u_int8_t idx)
+{
+	struct abis_om_hdr *oh;
+	struct msgb *msg = nm_msgb_alloc();
+
+	oh = (struct abis_om_hdr *) msgb_put(msg, ABIS_OM_FOM_HDR_SIZE);
+	fill_om_fom_hdr(oh, 0, NM_MT_BS11_CREATE_OBJ, NM_OC_BS11_BPORT,
+			idx, 0xff, 0xff);
+
+	return abis_nm_sendmsg(bts, msg);
+}
+
+int abis_nm_bs11_delete_bport(struct gsm_bts *bts, u_int8_t idx)
+{
+	struct abis_om_hdr *oh;
+	struct msgb *msg = nm_msgb_alloc();
+
+	oh = (struct abis_om_hdr *) msgb_put(msg, ABIS_OM_FOM_HDR_SIZE);
+	fill_om_fom_hdr(oh, 0, NM_MT_BS11_DELETE_OBJ, NM_OC_BS11_BPORT,
+			idx, 0xff, 0xff);
+
+	return abis_nm_sendmsg(bts, msg);
+}
+
+static const u_int8_t sm_attr[] = { NM_ATT_TEI, NM_ATT_ABIS_CHANNEL };
+int abis_nm_bs11_get_oml_tei_ts(struct gsm_bts *bts)
+{
+	struct abis_om_hdr *oh;
+	struct msgb *msg = nm_msgb_alloc();
+
+	oh = (struct abis_om_hdr *) msgb_put(msg, ABIS_OM_FOM_HDR_SIZE);
+	fill_om_fom_hdr(oh, 2+sizeof(sm_attr), NM_MT_GET_ATTR, NM_OC_SITE_MANAGER,
+			0xff, 0xff, 0xff);
+	msgb_tlv_put(msg, NM_ATT_LIST_REQ_ATTR, sizeof(sm_attr), sm_attr);
+
+	return abis_nm_sendmsg(bts, msg);
+}
+
+/* like abis_nm_conn_terr_traf + set_tei */
+int abis_nm_bs11_conn_oml_tei(struct gsm_bts *bts, u_int8_t e1_port,
+			  u_int8_t e1_timeslot, u_int8_t e1_subslot,
+			  u_int8_t tei)
+{
+	struct abis_om_hdr *oh;
+	struct abis_nm_channel *ch;
+	struct msgb *msg = nm_msgb_alloc();
+
+	oh = (struct abis_om_hdr *) msgb_put(msg, ABIS_OM_FOM_HDR_SIZE);
+	fill_om_fom_hdr(oh, sizeof(*ch)+2, NM_MT_BS11_SET_ATTR,
+			NM_OC_SITE_MANAGER, 0xff, 0xff, 0xff);
+
+	ch = (struct abis_nm_channel *) msgb_put(msg, sizeof(*ch));
+	fill_nm_channel(ch, e1_port, e1_timeslot, e1_subslot);
+	msgb_tv_put(msg, NM_ATT_TEI, tei);
+
+	return abis_nm_sendmsg(bts, msg);
+}
+
+int abis_nm_bs11_set_trx_power(struct gsm_bts_trx *trx, u_int8_t level)
+{
+	struct abis_om_hdr *oh;
+	struct msgb *msg = nm_msgb_alloc();
+
+	oh = (struct abis_om_hdr *) msgb_put(msg, ABIS_OM_FOM_HDR_SIZE);
+	fill_om_fom_hdr(oh, 3, NM_MT_BS11_SET_ATTR,
+			NM_OC_BS11, BS11_OBJ_PA, 0x00, trx->nr);
+	msgb_tlv_put(msg, NM_ATT_BS11_TXPWR, 1, &level);
+
+	return abis_nm_sendmsg(trx->bts, msg);
+}
+
+int abis_nm_bs11_get_trx_power(struct gsm_bts_trx *trx)
+{
+	struct abis_om_hdr *oh;
+	struct msgb *msg = nm_msgb_alloc();
+	u_int8_t attr = NM_ATT_BS11_TXPWR;
+
+	oh = (struct abis_om_hdr *) msgb_put(msg, ABIS_OM_FOM_HDR_SIZE);
+	fill_om_fom_hdr(oh, 2+sizeof(attr), NM_MT_GET_ATTR,
+			NM_OC_BS11, BS11_OBJ_PA, 0x00, trx->nr);
+	msgb_tlv_put(msg, NM_ATT_LIST_REQ_ATTR, sizeof(attr), &attr);
+
+	return abis_nm_sendmsg(trx->bts, msg);
+}
+
+int abis_nm_bs11_get_pll_mode(struct gsm_bts *bts)
+{
+	struct abis_om_hdr *oh;
+	struct msgb *msg = nm_msgb_alloc();
+	u_int8_t attr[] = { NM_ATT_BS11_PLL_MODE };
+
+	oh = (struct abis_om_hdr *) msgb_put(msg, ABIS_OM_FOM_HDR_SIZE);
+	fill_om_fom_hdr(oh, 2+sizeof(attr), NM_MT_GET_ATTR,
+			NM_OC_BS11, BS11_OBJ_LI, 0x00, 0x00);
+	msgb_tlv_put(msg, NM_ATT_LIST_REQ_ATTR, sizeof(attr), attr);
+
+	return abis_nm_sendmsg(bts, msg);
+}
+
+int abis_nm_bs11_get_cclk(struct gsm_bts *bts)
+{
+	struct abis_om_hdr *oh;
+	struct msgb *msg = nm_msgb_alloc();
+	u_int8_t attr[] = { NM_ATT_BS11_CCLK_ACCURACY,
+			    NM_ATT_BS11_CCLK_TYPE };
+
+	oh = (struct abis_om_hdr *) msgb_put(msg, ABIS_OM_FOM_HDR_SIZE);
+	fill_om_fom_hdr(oh, 2+sizeof(attr), NM_MT_GET_ATTR,
+			NM_OC_BS11, BS11_OBJ_CCLK, 0x00, 0x00);
+	msgb_tlv_put(msg, NM_ATT_LIST_REQ_ATTR, sizeof(attr), attr);
+
+	return abis_nm_sendmsg(bts, msg);
+
+}
+
+//static const u_int8_t bs11_logon_c7[] = { 0x07, 0xd9, 0x01, 0x11, 0x0d, 0x10, 0x20 };
+
+int abis_nm_bs11_factory_logon(struct gsm_bts *bts, int on)
+{
+	return abis_nm_bs11_logon(bts, 0x02, "FACTORY", on);
+}
+
+int abis_nm_bs11_infield_logon(struct gsm_bts *bts, int on)
+{
+	return abis_nm_bs11_logon(bts, 0x03, "FIELD  ", on);
+}
+
+int abis_nm_bs11_logon(struct gsm_bts *bts, u_int8_t level, const char *name, int on)
+{
+	struct abis_om_hdr *oh;
+	struct msgb *msg = nm_msgb_alloc();
+	struct bs11_date_time bdt;
+
+	get_bs11_date_time(&bdt);
+
+	oh = (struct abis_om_hdr *) msgb_put(msg, ABIS_OM_FOM_HDR_SIZE);
+	if (on) {
+		u_int8_t len = 3*2 + sizeof(bdt)
+				+ 1 + strlen(name);
+		fill_om_fom_hdr(oh, len, NM_MT_BS11_LMT_LOGON,
+				NM_OC_BS11_BTSE, 0xff, 0xff, 0xff);
+		msgb_tlv_put(msg, NM_ATT_BS11_LMT_LOGIN_TIME,
+			     sizeof(bdt), (u_int8_t *) &bdt);
+		msgb_tlv_put(msg, NM_ATT_BS11_LMT_USER_ACC_LEV,
+			     1, &level);
+		msgb_tlv_put(msg, NM_ATT_BS11_LMT_USER_NAME,
+			     strlen(name), (u_int8_t *)name);
+	} else {
+		fill_om_fom_hdr(oh, 0, NM_MT_BS11_LMT_LOGOFF,
+				NM_OC_BS11_BTSE, 0xff, 0xff, 0xff);
+	}
+	
+	return abis_nm_sendmsg(bts, msg);
+}
+
+int abis_nm_bs11_set_trx1_pw(struct gsm_bts *bts, const char *password)
+{
+	struct abis_om_hdr *oh;
+	struct msgb *msg;
+
+	if (strlen(password) != 10)
+		return -EINVAL;
+
+ 	msg = nm_msgb_alloc();
+	oh = (struct abis_om_hdr *) msgb_put(msg, ABIS_OM_FOM_HDR_SIZE);
+	fill_om_fom_hdr(oh, 2+strlen(password), NM_MT_BS11_SET_ATTR,
+			NM_OC_BS11, BS11_OBJ_TRX1, 0x00, 0x00);
+	msgb_tlv_put(msg, NM_ATT_BS11_PASSWORD, 10, (const u_int8_t *)password);
+
+	return abis_nm_sendmsg(bts, msg);
+}
+
+/* change the BS-11 PLL Mode to either locked (E1 derived) or standalone */
+int abis_nm_bs11_set_pll_locked(struct gsm_bts *bts, int locked)
+{
+	struct abis_om_hdr *oh;
+	struct msgb *msg;
+	u_int8_t tlv_value;
+	
+	msg = nm_msgb_alloc();
+	oh = (struct abis_om_hdr *) msgb_put(msg, ABIS_OM_FOM_HDR_SIZE);
+	fill_om_fom_hdr(oh, 3, NM_MT_BS11_SET_ATTR, NM_OC_BS11,
+			BS11_OBJ_LI, 0x00, 0x00);
+
+	if (locked)
+		tlv_value = BS11_LI_PLL_LOCKED;
+	else
+		tlv_value = BS11_LI_PLL_STANDALONE;
+	
+	msgb_tlv_put(msg, NM_ATT_BS11_PLL_MODE, 1, &tlv_value);
+	
+	return abis_nm_sendmsg(bts, msg);
+}
+
+/* Set the calibration value of the PLL (work value/set value)
+ * It depends on the login which one is changed */
+int abis_nm_bs11_set_pll(struct gsm_bts *bts, int value)
+{
+	struct abis_om_hdr *oh;
+	struct msgb *msg;
+	u_int8_t tlv_value[2];
+
+	msg = nm_msgb_alloc();
+	oh = (struct abis_om_hdr *) msgb_put(msg, ABIS_OM_FOM_HDR_SIZE);
+	fill_om_fom_hdr(oh, 3, NM_MT_BS11_SET_ATTR, NM_OC_BS11,
+			BS11_OBJ_TRX1, 0x00, 0x00);
+
+	tlv_value[0] = value>>8;
+	tlv_value[1] = value&0xff;
+
+	msgb_tlv_put(msg, NM_ATT_BS11_PLL, 2, tlv_value);
+
+	return abis_nm_sendmsg(bts, msg);
+}
+
+int abis_nm_bs11_get_state(struct gsm_bts *bts)
+{
+	return __simple_cmd(bts, NM_MT_BS11_GET_STATE);
+}
+
+/* BS11 SWL */
+
+void *tall_fle_ctx;
+
+struct abis_nm_bs11_sw {
+	struct gsm_bts *bts;
+	char swl_fname[PATH_MAX];
+	u_int8_t win_size;
+	int forced;
+	struct llist_head file_list;
+	gsm_cbfn *user_cb;	/* specified by the user */
+};
+static struct abis_nm_bs11_sw _g_bs11_sw, *g_bs11_sw = &_g_bs11_sw;
+
+struct file_list_entry {
+	struct llist_head list;
+	char fname[PATH_MAX];
+};
+
+struct file_list_entry *fl_dequeue(struct llist_head *queue)
+{
+	struct llist_head *lh;
+
+	if (llist_empty(queue))
+		return NULL;
+
+	lh = queue->next;
+	llist_del(lh);
+	
+	return llist_entry(lh, struct file_list_entry, list);
+}
+
+static int bs11_read_swl_file(struct abis_nm_bs11_sw *bs11_sw)
+{
+	char linebuf[255];
+	struct llist_head *lh, *lh2;
+	FILE *swl;
+	int rc = 0;
+
+	swl = fopen(bs11_sw->swl_fname, "r");
+	if (!swl)
+		return -ENODEV;
+
+	/* zero the stale file list, if any */
+	llist_for_each_safe(lh, lh2, &bs11_sw->file_list) {
+		llist_del(lh);
+		talloc_free(lh);
+	}
+
+	while (fgets(linebuf, sizeof(linebuf), swl)) {
+		char file_id[12+1];
+		char file_version[80+1];
+		struct file_list_entry *fle;
+		static char dir[PATH_MAX];
+
+		if (strlen(linebuf) < 4)
+			continue;
+	
+		rc = sscanf(linebuf+4, "%12s:%80s\r\n", file_id, file_version);
+		if (rc < 0) {
+			perror("ERR parsing SWL file");
+			rc = -EINVAL;
+			goto out;
+		}
+		if (rc < 2)
+			continue;
+
+		fle = talloc_zero(tall_fle_ctx, struct file_list_entry);
+		if (!fle) {
+			rc = -ENOMEM;
+			goto out;
+		}
+
+		/* construct new filename */
+		strncpy(dir, bs11_sw->swl_fname, sizeof(dir));
+		strncat(fle->fname, dirname(dir), sizeof(fle->fname) - 1);
+		strcat(fle->fname, "/");
+		strncat(fle->fname, file_id, sizeof(fle->fname) - 1 -strlen(fle->fname));
+		
+		llist_add_tail(&fle->list, &bs11_sw->file_list);
+	}
+
+out:
+	fclose(swl);
+	return rc;
+}
+
+/* bs11 swload specific callback, passed to abis_nm core swload */
+static int bs11_swload_cbfn(unsigned int hook, unsigned int event,
+			    struct msgb *msg, void *data, void *param)
+{
+	struct abis_nm_bs11_sw *bs11_sw = data;
+	struct file_list_entry *fle;
+	int rc = 0;
+
+	switch (event) {
+	case NM_MT_LOAD_END_ACK:
+		fle = fl_dequeue(&bs11_sw->file_list);
+		if (fle) {
+			/* start download the next file of our file list */
+			rc = abis_nm_software_load(bs11_sw->bts, 0xff, fle->fname,
+						   bs11_sw->win_size,
+						   bs11_sw->forced,
+						   &bs11_swload_cbfn, bs11_sw);
+			talloc_free(fle);
+		} else {
+			/* activate the SWL */
+			rc = abis_nm_software_activate(bs11_sw->bts,
+							bs11_sw->swl_fname,
+							bs11_swload_cbfn,
+							bs11_sw);
+		}
+		break;
+	case NM_MT_LOAD_SEG_ACK:
+	case NM_MT_LOAD_END_NACK:
+	case NM_MT_LOAD_INIT_ACK:
+	case NM_MT_LOAD_INIT_NACK:
+	case NM_MT_ACTIVATE_SW_NACK:
+	case NM_MT_ACTIVATE_SW_ACK:
+	default:
+		/* fallthrough to the user callback */
+		if (bs11_sw->user_cb)
+			rc = bs11_sw->user_cb(hook, event, msg, NULL, NULL);
+		break;
+	}
+
+	return rc;
+}
+
+/* Siemens provides a SWL file that is a mere listing of all the other
+ * files that are part of a software release.  We need to upload first
+ * the list file, and then each file that is listed in the list file */
+int abis_nm_bs11_load_swl(struct gsm_bts *bts, const char *fname,
+			  u_int8_t win_size, int forced, gsm_cbfn *cbfn)
+{
+	struct abis_nm_bs11_sw *bs11_sw = g_bs11_sw;
+	struct file_list_entry *fle;
+	int rc = 0;
+
+	INIT_LLIST_HEAD(&bs11_sw->file_list);
+	bs11_sw->bts = bts;
+	bs11_sw->win_size = win_size;
+	bs11_sw->user_cb = cbfn;
+	bs11_sw->forced = forced;
+
+	strncpy(bs11_sw->swl_fname, fname, sizeof(bs11_sw->swl_fname));
+	rc = bs11_read_swl_file(bs11_sw);
+	if (rc < 0)
+		return rc;
+
+	/* dequeue next item in file list */
+	fle = fl_dequeue(&bs11_sw->file_list);
+	if (!fle)
+		return -EINVAL;
+
+	/* start download the next file of our file list */
+	rc = abis_nm_software_load(bts, 0xff, fle->fname, win_size, forced,
+				   bs11_swload_cbfn, bs11_sw);
+	talloc_free(fle);
+	return rc;
+}
+
+#if 0
+static u_int8_t req_attr_btse[] = {
+	NM_ATT_ADM_STATE, NM_ATT_BS11_LMT_LOGON_SESSION,
+	NM_ATT_BS11_LMT_LOGIN_TIME, NM_ATT_BS11_LMT_USER_ACC_LEV,
+	NM_ATT_BS11_LMT_USER_NAME,
+
+	0xaf, NM_ATT_BS11_RX_OFFSET, NM_ATT_BS11_VENDOR_NAME,
+
+	NM_ATT_BS11_SW_LOAD_INTENDED, NM_ATT_BS11_SW_LOAD_SAFETY,
+
+	NM_ATT_BS11_SW_LOAD_STORED };
+
+static u_int8_t req_attr_btsm[] = {
+	NM_ATT_ABIS_CHANNEL, NM_ATT_TEI, NM_ATT_BS11_ABIS_EXT_TIME,
+	NM_ATT_ADM_STATE, NM_ATT_AVAIL_STATUS, 0xce, NM_ATT_FILE_ID,
+	NM_ATT_FILE_VERSION, NM_ATT_OPER_STATE, 0xe8, NM_ATT_BS11_ALL_TEST_CATG,
+	NM_ATT_SW_DESCR, NM_ATT_GET_ARI };
+#endif
+	
+static u_int8_t req_attr[] = {
+	NM_ATT_ADM_STATE, NM_ATT_AVAIL_STATUS, 0xa8, NM_ATT_OPER_STATE,
+	0xd5, 0xa1, NM_ATT_BS11_ESN_FW_CODE_NO, NM_ATT_BS11_ESN_HW_CODE_NO,
+	0x42, NM_ATT_BS11_ESN_PCB_SERIAL, NM_ATT_BS11_PLL };
+
+int abis_nm_bs11_get_serno(struct gsm_bts *bts)
+{
+	struct abis_om_hdr *oh;
+	struct msgb *msg = nm_msgb_alloc();
+
+	oh = (struct abis_om_hdr *) msgb_put(msg, ABIS_OM_FOM_HDR_SIZE);
+	/* SiemensHW CCTRL object */
+	fill_om_fom_hdr(oh, 2+sizeof(req_attr), NM_MT_GET_ATTR, NM_OC_BS11,
+			0x03, 0x00, 0x00);
+	msgb_tlv_put(msg, NM_ATT_LIST_REQ_ATTR, sizeof(req_attr), req_attr);
+
+	return abis_nm_sendmsg(bts, msg);
+}
+
+int abis_nm_bs11_set_ext_time(struct gsm_bts *bts)
+{
+	struct abis_om_hdr *oh;
+	struct msgb *msg = nm_msgb_alloc();
+	struct bs11_date_time aet;
+
+	get_bs11_date_time(&aet);
+	oh = (struct abis_om_hdr *) msgb_put(msg, ABIS_OM_FOM_HDR_SIZE);
+	/* SiemensHW CCTRL object */
+	fill_om_fom_hdr(oh, 2+sizeof(aet), NM_MT_BS11_SET_ATTR, NM_OC_SITE_MANAGER,
+			0xff, 0xff, 0xff);
+	msgb_tlv_put(msg, NM_ATT_BS11_ABIS_EXT_TIME, sizeof(aet), (u_int8_t *) &aet);
+
+	return abis_nm_sendmsg(bts, msg);
+}
+
+int abis_nm_bs11_get_bport_line_cfg(struct gsm_bts *bts, u_int8_t bport)
+{
+	struct abis_om_hdr *oh;
+	struct msgb *msg = nm_msgb_alloc();
+	u_int8_t attr = NM_ATT_BS11_LINE_CFG;
+
+	oh = (struct abis_om_hdr *) msgb_put(msg, ABIS_OM_FOM_HDR_SIZE);
+	fill_om_fom_hdr(oh, 2+sizeof(attr), NM_MT_GET_ATTR,
+			NM_OC_BS11_BPORT, bport, 0xff, 0x02);
+	msgb_tlv_put(msg, NM_ATT_LIST_REQ_ATTR, sizeof(attr), &attr);
+
+	return abis_nm_sendmsg(bts, msg);
+}
+
+int abis_nm_bs11_set_bport_line_cfg(struct gsm_bts *bts, u_int8_t bport, enum abis_bs11_line_cfg line_cfg)
+{
+	struct abis_om_hdr *oh;
+	struct msgb *msg = nm_msgb_alloc();
+	struct bs11_date_time aet;
+
+	get_bs11_date_time(&aet);
+	oh = (struct abis_om_hdr *) msgb_put(msg, ABIS_OM_FOM_HDR_SIZE);
+	fill_om_fom_hdr(oh, 2, NM_MT_BS11_SET_ATTR, NM_OC_BS11_BPORT,
+			bport, 0xff, 0x02);
+	msgb_tv_put(msg, NM_ATT_BS11_LINE_CFG, line_cfg);
+
+	return abis_nm_sendmsg(bts, msg);
+}
+
+/* ip.access nanoBTS specific commands */
+static const char ipaccess_magic[] = "com.ipaccess";
+
+
+static int abis_nm_rx_ipacc(struct msgb *msg)
+{
+	struct in_addr addr;
+	struct abis_om_hdr *oh = msgb_l2(msg);
+	struct abis_om_fom_hdr *foh;
+	u_int8_t idstrlen = oh->data[0];
+	struct tlv_parsed tp;
+	struct ipacc_ack_signal_data signal;
+
+	if (strncmp((char *)&oh->data[1], ipaccess_magic, idstrlen)) {
+		LOGP(DNM, LOGL_ERROR, "id string is not com.ipaccess !?!\n");
+		return -EINVAL;
+	}
+
+	foh = (struct abis_om_fom_hdr *) (oh->data + 1 + idstrlen);
+	abis_nm_tlv_parse(&tp, msg->trx->bts, foh->data, oh->length-sizeof(*foh));
+
+	debugp_foh(foh);
+
+	DEBUGPC(DNM, "IPACCESS(0x%02x): ", foh->msg_type);
+
+	switch (foh->msg_type) {
+	case NM_MT_IPACC_RSL_CONNECT_ACK:
+		DEBUGPC(DNM, "RSL CONNECT ACK ");
+		if (TLVP_PRESENT(&tp, NM_ATT_IPACC_DST_IP)) {
+			memcpy(&addr,
+				TLVP_VAL(&tp, NM_ATT_IPACC_DST_IP), sizeof(addr));
+
+			DEBUGPC(DNM, "IP=%s ", inet_ntoa(addr));
+		}
+		if (TLVP_PRESENT(&tp, NM_ATT_IPACC_DST_IP_PORT))
+			DEBUGPC(DNM, "PORT=%u ",
+				ntohs(*((u_int16_t *)
+					TLVP_VAL(&tp, NM_ATT_IPACC_DST_IP_PORT))));
+		if (TLVP_PRESENT(&tp, NM_ATT_IPACC_STREAM_ID))
+			DEBUGPC(DNM, "STREAM=0x%02x ",
+					*TLVP_VAL(&tp, NM_ATT_IPACC_STREAM_ID));
+		DEBUGPC(DNM, "\n");
+		break;
+	case NM_MT_IPACC_RSL_CONNECT_NACK:
+		LOGP(DNM, LOGL_ERROR, "RSL CONNECT NACK ");
+		if (TLVP_PRESENT(&tp, NM_ATT_NACK_CAUSES))
+			DEBUGPC(DNM, " CAUSE=%s\n",
+				nack_cause_name(*TLVP_VAL(&tp, NM_ATT_NACK_CAUSES)));
+		else
+			DEBUGPC(DNM, "\n");
+		break;
+	case NM_MT_IPACC_SET_NVATTR_ACK:
+		DEBUGPC(DNM, "SET NVATTR ACK\n");
+		/* FIXME: decode and show the actual attributes */
+		break;
+	case NM_MT_IPACC_SET_NVATTR_NACK:
+		LOGP(DNM, LOGL_ERROR, "SET NVATTR NACK ");
+		if (TLVP_PRESENT(&tp, NM_ATT_NACK_CAUSES))
+			LOGPC(DNM, LOGL_ERROR, " CAUSE=%s\n",
+				nack_cause_name(*TLVP_VAL(&tp, NM_ATT_NACK_CAUSES)));
+		else
+			LOGPC(DNM, LOGL_ERROR, "\n");
+		break;
+	case NM_MT_IPACC_GET_NVATTR_ACK:
+		DEBUGPC(DNM, "GET NVATTR ACK\n");
+		/* FIXME: decode and show the actual attributes */
+		break;
+	case NM_MT_IPACC_GET_NVATTR_NACK:
+		LOGPC(DNM, LOGL_ERROR, "GET NVATTR NACK ");
+		if (TLVP_PRESENT(&tp, NM_ATT_NACK_CAUSES))
+			LOGPC(DNM, LOGL_ERROR, " CAUSE=%s\n",
+				nack_cause_name(*TLVP_VAL(&tp, NM_ATT_NACK_CAUSES)));
+		else
+			LOGPC(DNM, LOGL_ERROR, "\n");
+		break;
+	case NM_MT_IPACC_SET_ATTR_ACK:
+		DEBUGPC(DNM, "SET ATTR ACK\n");
+		break;
+	case NM_MT_IPACC_SET_ATTR_NACK:
+		LOGPC(DNM, LOGL_ERROR, "SET ATTR NACK ");
+		if (TLVP_PRESENT(&tp, NM_ATT_NACK_CAUSES))
+			LOGPC(DNM, LOGL_ERROR, " CAUSE=%s\n",
+				nack_cause_name(*TLVP_VAL(&tp, NM_ATT_NACK_CAUSES)));
+		else
+			LOGPC(DNM, LOGL_ERROR, "\n");
+		break;
+	default:
+		DEBUGPC(DNM, "unknown\n");
+		break;
+	}
+
+	/* signal handling */
+	switch  (foh->msg_type) {
+	case NM_MT_IPACC_RSL_CONNECT_NACK:
+	case NM_MT_IPACC_SET_NVATTR_NACK:
+	case NM_MT_IPACC_GET_NVATTR_NACK:
+		signal.trx = gsm_bts_trx_by_nr(msg->trx->bts, foh->obj_inst.trx_nr);
+		signal.msg_type = foh->msg_type;
+		dispatch_signal(SS_NM, S_NM_IPACC_NACK, &signal);
+		break;
+	case NM_MT_IPACC_SET_NVATTR_ACK:
+		signal.trx = gsm_bts_trx_by_nr(msg->trx->bts, foh->obj_inst.trx_nr);
+		signal.msg_type = foh->msg_type;
+		dispatch_signal(SS_NM, S_NM_IPACC_ACK, &signal);
+		break;
+	default:
+		break;
+	}
+
+	return 0;
+}
+
+/* send an ip-access manufacturer specific message */
+int abis_nm_ipaccess_msg(struct gsm_bts *bts, u_int8_t msg_type,
+			 u_int8_t obj_class, u_int8_t bts_nr,
+			 u_int8_t trx_nr, u_int8_t ts_nr,
+			 u_int8_t *attr, int attr_len)
+{
+	struct msgb *msg = nm_msgb_alloc();
+	struct abis_om_hdr *oh;
+	struct abis_om_fom_hdr *foh;
+	u_int8_t *data;
+
+	/* construct the 12.21 OM header, observe the erroneous length */
+	oh = (struct abis_om_hdr *) msgb_put(msg, sizeof(*oh));
+	fill_om_hdr(oh, sizeof(*foh) + attr_len);
+	oh->mdisc = ABIS_OM_MDISC_MANUF;
+
+	/* add the ip.access magic */
+	data = msgb_put(msg, sizeof(ipaccess_magic)+1);
+	*data++ = sizeof(ipaccess_magic);
+	memcpy(data, ipaccess_magic, sizeof(ipaccess_magic));
+
+	/* fill the 12.21 FOM header */
+	foh = (struct abis_om_fom_hdr *) msgb_put(msg, sizeof(*foh));
+	foh->msg_type = msg_type;
+	foh->obj_class = obj_class;
+	foh->obj_inst.bts_nr = bts_nr;
+	foh->obj_inst.trx_nr = trx_nr;
+	foh->obj_inst.ts_nr = ts_nr;
+
+	if (attr && attr_len) {
+		data = msgb_put(msg, attr_len);
+		memcpy(data, attr, attr_len);
+	}
+
+	return abis_nm_sendmsg(bts, msg);
+}
+
+/* set some attributes in NVRAM */
+int abis_nm_ipaccess_set_nvattr(struct gsm_bts_trx *trx, u_int8_t *attr,
+				int attr_len)
+{
+	return abis_nm_ipaccess_msg(trx->bts, NM_MT_IPACC_SET_NVATTR,
+				    NM_OC_BASEB_TRANSC, 0, trx->nr, 0xff, attr,
+				    attr_len);
+}
+
+int abis_nm_ipaccess_rsl_connect(struct gsm_bts_trx *trx,
+				 u_int32_t ip, u_int16_t port, u_int8_t stream)
+{
+	struct in_addr ia;
+	u_int8_t attr[] = { NM_ATT_IPACC_STREAM_ID, 0,
+			    NM_ATT_IPACC_DST_IP_PORT, 0, 0,
+			    NM_ATT_IPACC_DST_IP, 0, 0, 0, 0 };
+
+	int attr_len = sizeof(attr);
+
+	ia.s_addr = htonl(ip);
+	attr[1] = stream;
+	attr[3] = port >> 8;
+	attr[4] = port & 0xff;
+	*(u_int32_t *)(attr+6) = ia.s_addr;
+
+	/* if ip == 0, we use the default IP */
+	if (ip == 0)
+		attr_len -= 5;
+
+	DEBUGP(DNM, "ip.access RSL CONNECT IP=%s PORT=%u STREAM=0x%02x\n",
+		inet_ntoa(ia), port, stream);
+
+	return abis_nm_ipaccess_msg(trx->bts, NM_MT_IPACC_RSL_CONNECT,
+				    NM_OC_BASEB_TRANSC, trx->bts->bts_nr,
+				    trx->nr, 0xff, attr, attr_len);
+}
+
+/* restart / reboot an ip.access nanoBTS */
+int abis_nm_ipaccess_restart(struct gsm_bts_trx *trx)
+{
+	struct abis_om_hdr *oh;
+	struct msgb *msg = nm_msgb_alloc();
+
+	oh = (struct abis_om_hdr *) msgb_put(msg, ABIS_OM_FOM_HDR_SIZE);
+	fill_om_fom_hdr(oh, 0, NM_MT_IPACC_RESTART, NM_OC_BASEB_TRANSC,
+			trx->bts->nr, trx->nr, 0xff);
+
+	return abis_nm_sendmsg(trx->bts, msg);
+}
+
+int abis_nm_ipaccess_set_attr(struct gsm_bts *bts, u_int8_t obj_class,
+				u_int8_t bts_nr, u_int8_t trx_nr, u_int8_t ts_nr,
+				u_int8_t *attr, u_int8_t attr_len)
+{
+	return abis_nm_ipaccess_msg(bts, NM_MT_IPACC_SET_ATTR,
+				    obj_class, bts_nr, trx_nr, ts_nr,
+				     attr, attr_len);
+}
+
+void abis_nm_ipaccess_cgi(u_int8_t *buf, struct gsm_bts *bts)
+{
+	/* we simply reuse the GSM48 function and overwrite the RAC
+	 * with the Cell ID */
+	gsm48_ra_id_by_bts(buf, bts);
+	*((u_int16_t *)(buf + 5)) = htons(bts->cell_identity);
+}
+
+void gsm_trx_lock_rf(struct gsm_bts_trx *trx, int locked)
+{
+	int new_state = locked ? NM_STATE_LOCKED : NM_STATE_UNLOCKED;
+
+	trx->nm_state.administrative = new_state;
+	if (!trx->bts || !trx->bts->oml_link)
+		return;
+
+	abis_nm_chg_adm_state(trx->bts, NM_OC_RADIO_CARRIER,
+			      trx->bts->bts_nr, trx->nr, 0xff,
+			      new_state);
+}
+
+static const struct value_string ipacc_testres_names[] = {
+	{ NM_IPACC_TESTRES_SUCCESS,	"SUCCESS" },
+	{ NM_IPACC_TESTRES_TIMEOUT,	"TIMEOUT" },
+	{ NM_IPACC_TESTRES_NO_CHANS,	"NO CHANNELS" },
+	{ NM_IPACC_TESTRES_PARTIAL,	"PARTIAL" },
+	{ NM_IPACC_TESTRES_STOPPED,	"STOPPED" },
+	{ 0,				NULL }
+};
+
+const char *ipacc_testres_name(u_int8_t res)
+{
+	return get_value_string(ipacc_testres_names, res);
+}
+
+void ipac_parse_cgi(struct cell_global_id *cid, const u_int8_t *buf)
+{
+	cid->mcc = (buf[0] & 0xf) * 100;
+	cid->mcc += (buf[0] >> 4) *  10;
+	cid->mcc += (buf[1] & 0xf) *  1;
+
+	if (buf[1] >> 4 == 0xf) {
+		cid->mnc = (buf[2] & 0xf) * 10;
+		cid->mnc += (buf[2] >> 4) *  1;
+	} else {
+		cid->mnc = (buf[2] & 0xf) * 100;
+		cid->mnc += (buf[2] >> 4) *  10;
+		cid->mnc += (buf[1] >> 4) *   1;
+	}
+
+	cid->lac = ntohs(*((u_int16_t *)&buf[3]));
+	cid->ci = ntohs(*((u_int16_t *)&buf[5]));
+}
+
+/* parse BCCH information IEI from wire format to struct ipac_bcch_info */
+int ipac_parse_bcch_info(struct ipac_bcch_info *binf, u_int8_t *buf)
+{
+	u_int8_t *cur = buf;
+	u_int16_t len;
+
+	memset(binf, 0, sizeof(*binf));
+
+	if (cur[0] != NM_IPAC_EIE_BCCH_INFO)
+		return -EINVAL;
+	cur++;
+
+	len = ntohs(*(u_int16_t *)cur);
+	cur += 2;
+
+	binf->info_type = ntohs(*(u_int16_t *)cur);
+	cur += 2;
+
+	if (binf->info_type & IPAC_BINF_FREQ_ERR_QUAL)
+		binf->freq_qual = *cur >> 2;
+
+	binf->arfcn = (*cur++ & 3) << 8;
+	binf->arfcn |= *cur++;
+
+	if (binf->info_type & IPAC_BINF_RXLEV)
+		binf->rx_lev = *cur & 0x3f;
+	cur++;
+
+	if (binf->info_type & IPAC_BINF_RXQUAL)
+		binf->rx_qual = *cur & 0x7;
+	cur++;
+
+	if (binf->info_type & IPAC_BINF_FREQ_ERR_QUAL)
+		binf->freq_err = ntohs(*(u_int16_t *)cur);
+	cur += 2;
+
+	if (binf->info_type & IPAC_BINF_FRAME_OFFSET)
+		binf->frame_offset = ntohs(*(u_int16_t *)cur);
+	cur += 2;
+
+	if (binf->info_type & IPAC_BINF_FRAME_NR_OFFSET)
+		binf->frame_nr_offset = ntohl(*(u_int32_t *)cur);
+	cur += 4;
+
+#if 0
+	/* Somehow this is not set correctly */
+	if (binf->info_type & IPAC_BINF_BSIC)
+#endif
+		binf->bsic = *cur & 0x3f;
+	cur++;
+
+	ipac_parse_cgi(&binf->cgi, cur);
+	cur += 7;
+
+	if (binf->info_type & IPAC_BINF_NEIGH_BA_SI2) {
+		memcpy(binf->ba_list_si2, cur, sizeof(binf->ba_list_si2));
+		cur += sizeof(binf->ba_list_si2);
+	}
+
+	if (binf->info_type & IPAC_BINF_NEIGH_BA_SI2bis) {
+		memcpy(binf->ba_list_si2bis, cur,
+			sizeof(binf->ba_list_si2bis));
+		cur += sizeof(binf->ba_list_si2bis);
+	}
+
+	if (binf->info_type & IPAC_BINF_NEIGH_BA_SI2ter) {
+		memcpy(binf->ba_list_si2ter, cur,
+			sizeof(binf->ba_list_si2ter));
+		cur += sizeof(binf->ba_list_si2ter);
+	}
+
+	return 0;
+}
+
+void abis_nm_clear_queue(struct gsm_bts *bts)
+{
+	struct msgb *msg;
+
+	while (!llist_empty(&bts->abis_queue)) {
+		msg = msgb_dequeue(&bts->abis_queue);
+		msgb_free(msg);
+	}
+
+	bts->abis_nm_pend = 0;
+}
diff --git a/src/libbsc/abis_nm_vty.c b/src/libbsc/abis_nm_vty.c
new file mode 100644
index 000000000..996a85749
--- /dev/null
+++ b/src/libbsc/abis_nm_vty.c
@@ -0,0 +1,197 @@
+/* VTY interface for A-bis OML (Netowrk Management) */
+
+/* (C) 2009-2010 by Harald Welte <laforge@gnumonks.org>
+ *
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <stdlib.h>
+#include <unistd.h>
+#include <errno.h>
+#include <stdint.h>
+
+#include <arpa/inet.h>
+
+#include <openbsc/gsm_data.h>
+#include <osmocore/msgb.h>
+#include <osmocore/tlv.h>
+#include <osmocore/talloc.h>
+#include <openbsc/debug.h>
+#include <openbsc/signal.h>
+#include <openbsc/abis_nm.h>
+#include <openbsc/vty.h>
+
+#include <osmocom/vty/vty.h>
+#include <osmocom/vty/command.h>
+#include <osmocom/vty/logging.h>
+#include <osmocom/vty/telnet_interface.h>
+
+extern struct gsm_network *bsc_gsmnet;
+
+static struct cmd_node oml_node = {
+	OML_NODE,
+	"%s(oml)# ",
+	1,
+};
+
+struct oml_node_state {
+	struct gsm_bts *bts;
+	uint8_t obj_class;
+	uint8_t obj_inst[3];
+};
+
+static int dummy_config_write(struct vty *v)
+{
+	return CMD_SUCCESS;
+}
+
+/* FIXME: auto-generate those strings from the value_string lists */
+#define NM_OBJCLASS_VTY "(site-manager|bts|radio-carrier|baseband-transceiver|channel|adjc|handover|power-contorl|btse|rack|test|envabtse|bport|gprs-nse|gprs-cell|gprs-nsvc|siemenshw)"
+#define NM_OBJCLASS_VTY_HELP "FIXME"
+
+DEFUN(oml_class_inst, oml_class_inst_cmd,
+	"bts <0-255> oml class " NM_OBJCLASS_VTY
+					" instance <0-255> <0-255> <0-255>",
+	"BTS related commands\n" "BTS Number\n"
+	"Manipulate the OML managed objects\n"
+	"Object Class\n" 	NM_OBJCLASS_VTY_HELP
+	"Object Instance\n" "BTS Number\n" "TRX Number\n" "TS Number\n")
+{
+	struct gsm_bts *bts;
+	struct oml_node_state *oms;
+	int bts_nr = atoi(argv[0]);
+
+	bts = gsm_bts_num(bsc_gsmnet, bts_nr);
+	if (!bts) {
+		vty_out(vty, "%% No such BTS (%d)%s", bts_nr, VTY_NEWLINE);
+		return CMD_WARNING;
+	}