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-rw-r--r--.gitignore26
-rw-r--r--Makefile.am14
-rw-r--r--configure.ac51
-rwxr-xr-xgit-version-gen151
-rw-r--r--include/Makefile.am3
-rw-r--r--include/internal.h102
-rw-r--r--include/lapd.h46
-rw-r--r--include/mISDNif.h387
-rw-r--r--include/osmocom/Makefile.am1
-rw-r--r--include/osmocom/gsm/Makefile.am1
-rw-r--r--include/osmocom/gsm/abis/Makefile.am3
-rw-r--r--include/osmocom/gsm/abis/e1_input.h226
-rw-r--r--include/osmocom/gsm/abis/ipaccess.h93
-rw-r--r--include/osmocom/gsm/abis/subchan_demux.h101
-rw-r--r--include/osmocom/gsm/abis/trau_frame.h63
-rw-r--r--libosmoabis.pc.in11
-rw-r--r--src/Makefile.am17
-rw-r--r--src/e1_input.c628
-rw-r--r--src/input/Makefile.am11
-rw-r--r--src/input/dahdi.c495
-rw-r--r--src/input/hsl.c296
-rw-r--r--src/input/ipaccess.c499
-rw-r--r--src/input/lapd.c713
-rw-r--r--src/input/misdn.c547
-rw-r--r--src/socket.c109
-rw-r--r--src/subchan_demux.c323
-rw-r--r--src/trau_frame.c260
-rw-r--r--tests/Makefile.am10
-rw-r--r--tests/e1inp_ipa_bsc_test.c69
29 files changed, 5256 insertions, 0 deletions
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..b299baa
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,26 @@
+Makefile
+Makefile.in
+.deps
+.libs
+*.o
+*.lo
+*.la
+*.pc
+aclocal.m4
+m4/*.m4
+autom4te.cache
+config.h*
+config.sub
+config.log
+config.status
+config.guess
+configure
+depcomp
+missing
+ltmain.sh
+install-sh
+stamp-h1
+libtool
+
+.tarball-version
+.version
diff --git a/Makefile.am b/Makefile.am
new file mode 100644
index 0000000..17b9dbd
--- /dev/null
+++ b/Makefile.am
@@ -0,0 +1,14 @@
+AUTOMAKE_OPTIONS = foreign dist-bzip2 1.6
+ACLOCAL_AMFLAGS = -I m4
+
+INCLUDES = $(all_includes) -I$(top_srcdir)/include
+SUBDIRS = include src tests
+
+pkgconfigdir = $(libdir)/pkgconfig
+pkgconfig_DATA = libosmoabis.pc
+
+BUILT_SOURCES = $(top_srcdir)/.version
+$(top_srcdir)/.version:
+ echo $(VERSION) > $@-t && mv $@-t $@
+dist-hook:
+ echo $(VERSION) > $(distdir)/.tarball-version
diff --git a/configure.ac b/configure.ac
new file mode 100644
index 0000000..02ecdb4
--- /dev/null
+++ b/configure.ac
@@ -0,0 +1,51 @@
+AC_INIT([libosmo-abis],
+ m4_esyscmd([./git-version-gen .tarball-version]),
+ [openbsc-devel@lists.openbsc.org])
+
+AM_INIT_AUTOMAKE([dist-bzip2])
+
+dnl kernel style compile messages
+m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
+
+dnl checks for programs
+AC_PROG_MAKE_SET
+AC_PROG_CC
+AC_PROG_INSTALL
+LT_INIT
+AC_PROG_LIBTOOL
+
+AC_CONFIG_MACRO_DIR([m4])
+
+dnl checks for header files
+AC_HEADER_STDC
+AC_CHECK_HEADERS(execinfo.h sys/select.h sys/socket.h syslog.h ctype.h)
+
+# The following test is taken from WebKit's webkit.m4
+saved_CFLAGS="$CFLAGS"
+CFLAGS="$CFLAGS -fvisibility=hidden "
+AC_MSG_CHECKING([if ${CC} supports -fvisibility=hidden])
+AC_COMPILE_IFELSE([AC_LANG_SOURCE([char foo;])],
+ [ AC_MSG_RESULT([yes])
+ SYMBOL_VISIBILITY="-fvisibility=hidden"],
+ AC_MSG_RESULT([no]))
+CFLAGS="$saved_CFLAGS"
+AC_SUBST(SYMBOL_VISIBILITY)
+
+dnl Generate the output
+AM_CONFIG_HEADER(config.h)
+
+PKG_CHECK_MODULES(LIBOSMOCORE, libosmocore >= 0.3.0)
+PKG_CHECK_MODULES(LIBOSMOVTY, libosmovty >= 0.3.0)
+PKG_CHECK_MODULES(LIBOSMOGSM, libosmogsm >= 0.3.0)
+PKG_CHECK_MODULES([LIBTALLOC], talloc >= 2.0.1)
+
+AC_OUTPUT(
+ libosmoabis.pc
+ include/Makefile
+ include/osmocom/Makefile
+ include/osmocom/gsm/Makefile
+ include/osmocom/gsm/abis/Makefile
+ src/Makefile
+ src/input/Makefile
+ tests/Makefile
+ Makefile)
diff --git a/git-version-gen b/git-version-gen
new file mode 100755
index 0000000..42cf3d2
--- /dev/null
+++ b/git-version-gen
@@ -0,0 +1,151 @@
+#!/bin/sh
+# Print a version string.
+scriptversion=2010-01-28.01
+
+# Copyright (C) 2007-2010 Free Software Foundation, Inc.
+#
+# 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 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 General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+# This script is derived from GIT-VERSION-GEN from GIT: http://git.or.cz/.
+# It may be run two ways:
+# - from a git repository in which the "git describe" command below
+# produces useful output (thus requiring at least one signed tag)
+# - from a non-git-repo directory containing a .tarball-version file, which
+# presumes this script is invoked like "./git-version-gen .tarball-version".
+
+# In order to use intra-version strings in your project, you will need two
+# separate generated version string files:
+#
+# .tarball-version - present only in a distribution tarball, and not in
+# a checked-out repository. Created with contents that were learned at
+# the last time autoconf was run, and used by git-version-gen. Must not
+# be present in either $(srcdir) or $(builddir) for git-version-gen to
+# give accurate answers during normal development with a checked out tree,
+# but must be present in a tarball when there is no version control system.
+# Therefore, it cannot be used in any dependencies. GNUmakefile has
+# hooks to force a reconfigure at distribution time to get the value
+# correct, without penalizing normal development with extra reconfigures.
+#
+# .version - present in a checked-out repository and in a distribution
+# tarball. Usable in dependencies, particularly for files that don't
+# want to depend on config.h but do want to track version changes.
+# Delete this file prior to any autoconf run where you want to rebuild
+# files to pick up a version string change; and leave it stale to
+# minimize rebuild time after unrelated changes to configure sources.
+#
+# It is probably wise to add these two files to .gitignore, so that you
+# don't accidentally commit either generated file.
+#
+# Use the following line in your configure.ac, so that $(VERSION) will
+# automatically be up-to-date each time configure is run (and note that
+# since configure.ac no longer includes a version string, Makefile rules
+# should not depend on configure.ac for version updates).
+#
+# AC_INIT([GNU project],
+# m4_esyscmd([build-aux/git-version-gen .tarball-version]),
+# [bug-project@example])
+#
+# Then use the following lines in your Makefile.am, so that .version
+# will be present for dependencies, and so that .tarball-version will
+# exist in distribution tarballs.
+#
+# BUILT_SOURCES = $(top_srcdir)/.version
+# $(top_srcdir)/.version:
+# echo $(VERSION) > $@-t && mv $@-t $@
+# dist-hook:
+# echo $(VERSION) > $(distdir)/.tarball-version
+
+case $# in
+ 1) ;;
+ *) echo 1>&2 "Usage: $0 \$srcdir/.tarball-version"; exit 1;;
+esac
+
+tarball_version_file=$1
+nl='
+'
+
+# First see if there is a tarball-only version file.
+# then try "git describe", then default.
+if test -f $tarball_version_file
+then
+ v=`cat $tarball_version_file` || exit 1
+ case $v in
+ *$nl*) v= ;; # reject multi-line output
+ [0-9]*) ;;
+ *) v= ;;
+ esac
+ test -z "$v" \
+ && echo "$0: WARNING: $tarball_version_file seems to be damaged" 1>&2
+fi
+
+if test -n "$v"
+then
+ : # use $v
+elif
+ v=`git describe --abbrev=4 --match='v*' HEAD 2>/dev/null \
+ || git describe --abbrev=4 HEAD 2>/dev/null` \
+ && case $v in
+ [0-9]*) ;;
+ v[0-9]*) ;;
+ *) (exit 1) ;;
+ esac
+then
+ # Is this a new git that lists number of commits since the last
+ # tag or the previous older version that did not?
+ # Newer: v6.10-77-g0f8faeb
+ # Older: v6.10-g0f8faeb
+ case $v in
+ *-*-*) : git describe is okay three part flavor ;;
+ *-*)
+ : git describe is older two part flavor
+ # Recreate the number of commits and rewrite such that the
+ # result is the same as if we were using the newer version
+ # of git describe.
+ vtag=`echo "$v" | sed 's/-.*//'`
+ numcommits=`git rev-list "$vtag"..HEAD | wc -l`
+ v=`echo "$v" | sed "s/\(.*\)-\(.*\)/\1-$numcommits-\2/"`;
+ ;;
+ esac
+
+ # Change the first '-' to a '.', so version-comparing tools work properly.
+ # Remove the "g" in git describe's output string, to save a byte.
+ v=`echo "$v" | sed 's/-/./;s/\(.*\)-g/\1-/'`;
+else
+ v=UNKNOWN
+fi
+
+v=`echo "$v" |sed 's/^v//'`
+
+# Don't declare a version "dirty" merely because a time stamp has changed.
+git status > /dev/null 2>&1
+
+dirty=`sh -c 'git diff-index --name-only HEAD' 2>/dev/null` || dirty=
+case "$dirty" in
+ '') ;;
+ *) # Append the suffix only if there isn't one already.
+ case $v in
+ *-dirty) ;;
+ *) v="$v-dirty" ;;
+ esac ;;
+esac
+
+# Omit the trailing newline, so that m4_esyscmd can use the result directly.
+echo "$v" | tr -d '\012'
+
+# Local variables:
+# eval: (add-hook 'write-file-hooks 'time-stamp)
+# time-stamp-start: "scriptversion="
+# time-stamp-format: "%:y-%02m-%02d.%02H"
+# time-stamp-end: "$"
+# End:
diff --git a/include/Makefile.am b/include/Makefile.am
new file mode 100644
index 0000000..c94d3ee
--- /dev/null
+++ b/include/Makefile.am
@@ -0,0 +1,3 @@
+noinst_HEADERS=mISDNif.h internal.h lapd.h
+
+SUBDIRS=osmocom
diff --git a/include/internal.h b/include/internal.h
new file mode 100644
index 0000000..131e12b
--- /dev/null
+++ b/include/internal.h
@@ -0,0 +1,102 @@
+#ifndef _INTERNAL_H_
+#define _INTERNAL_H_
+
+/* things I don't know what to do with yet. */
+
+/* extracted from include/openbsc/debug.h. */
+#define BSC_CTX_BTS 2
+
+/* from include/openbsc/signal.h, we need SS_INPUT and S_GLOBAL_SHUTDOWN. */
+enum signal_subsystems {
+ SS_PAGING,
+ SS_SMS,
+ SS_ABISIP,
+ SS_NM,
+ SS_LCHAN,
+ SS_SUBSCR,
+ SS_SCALL,
+ SS_GLOBAL,
+ SS_CHALLOC,
+ SS_NS,
+ SS_IPAC_NWL,
+ SS_RF,
+ SS_MSC,
+ SS_HO,
+ SS_INPUT,
+};
+
+enum signal_global {
+ S_GLOBAL_SHUTDOWN,
+ S_GLOBAL_BTS_CLOSE_OM,
+};
+
+/* from include/openbsc/vty.h, we need E1INP_NODE */
+#include <osmocom/vty/vty.h>
+#include <osmocom/vty/buffer.h>
+#include <osmocom/vty/command.h>
+
+enum bsc_vty_node {
+ GSMNET_NODE = _LAST_OSMOVTY_NODE + 1,
+ BTS_NODE,
+ TRX_NODE,
+ TS_NODE,
+ SUBSCR_NODE,
+ MGCP_NODE,
+ GBPROXY_NODE,
+ SGSN_NODE,
+ NS_NODE,
+ BSSGP_NODE,
+ OML_NODE,
+ E1INP_NODE,
+ NAT_NODE,
+ NAT_BSC_NODE,
+ MSC_NODE,
+ OM2K_NODE,
+ TRUNK_NODE,
+ PGROUP_NODE,
+};
+
+/* from include/openbsc/debug.h */
+enum {
+ DRLL,
+ DCC,
+ DMM,
+ DRR,
+ DRSL,
+ DNM,
+ DMNCC,
+ DSMS,
+ DPAG,
+ DMEAS,
+ DMI,
+ DMIB,
+ DMUX,
+ DINP,
+ DSCCP,
+ DMSC,
+ DMGCP,
+ DHO,
+ DDB,
+ DREF,
+ DGPRS,
+ DNS,
+ DBSSGP,
+ DLLC,
+ DSNDCP,
+ DNAT,
+ Debug_LastEntry,
+};
+
+struct osmo_fd;
+struct msgb *ipaccess_read_msg(struct osmo_fd *bfd, int *error);
+void ipaccess_prepend_header(struct msgb *msg, int proto);
+
+#include <stdint.h>
+
+int make_sock(struct osmo_fd *bfd, int proto,
+ uint32_t ip, uint16_t port, int priv_nr,
+ int (*cb)(struct osmo_fd *fd, unsigned int what), void *data);
+
+uint8_t *trau_idle_frame(void);
+
+#endif
diff --git a/include/lapd.h b/include/lapd.h
new file mode 100644
index 0000000..fb980d1
--- /dev/null
+++ b/include/lapd.h
@@ -0,0 +1,46 @@
+#ifndef OPENBSC_LAPD_H
+#define OPENBSC_LAPD_H
+
+#include <stdint.h>
+
+#include <osmocom/core/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/include/mISDNif.h b/include/mISDNif.h
new file mode 100644
index 0000000..8e065d2
--- /dev/null
+++ b/include/mISDNif.h
@@ -0,0 +1,387 @@
+/*
+ *
+ * Author Karsten Keil <kkeil@novell.com>
+ *
+ * Copyright 2008 by Karsten Keil <kkeil@novell.com>
+ *
+ * This code is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU LESSER GENERAL PUBLIC LICENSE
+ * version 2.1 as published by the Free Software Foundation.
+ *
+ * This code 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 LESSER GENERAL PUBLIC LICENSE for more details.
+ *
+ */
+
+#ifndef mISDNIF_H
+#define mISDNIF_H
+
+#include <stdarg.h>
+#ifdef linux
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/socket.h>
+#else
+#include <sys/types.h>
+#include <sys/errno.h>
+#include <sys/socket.h>
+#endif
+
+/*
+ * ABI Version 32 bit
+ *
+ * <8 bit> Major version
+ * - changed if any interface become backwards incompatible
+ *
+ * <8 bit> Minor version
+ * - changed if any interface is extended but backwards compatible
+ *
+ * <16 bit> Release number
+ * - should be incremented on every checkin
+ */
+#define MISDN_MAJOR_VERSION 1
+#define MISDN_MINOR_VERSION 1
+#define MISDN_RELEASE 20
+
+/* primitives for information exchange
+ * generell format
+ * <16 bit 0 >
+ * <8 bit command>
+ * BIT 8 = 1 LAYER private
+ * BIT 7 = 1 answer
+ * BIT 6 = 1 DATA
+ * <8 bit target layer mask>
+ *
+ * Layer = 00 is reserved for general commands
+ Layer = 01 L2 -> HW
+ Layer = 02 HW -> L2
+ Layer = 04 L3 -> L2
+ Layer = 08 L2 -> L3
+ * Layer = FF is reserved for broadcast commands
+ */
+
+#define MISDN_CMDMASK 0xff00
+#define MISDN_LAYERMASK 0x00ff
+
+/* generell commands */
+#define OPEN_CHANNEL 0x0100
+#define CLOSE_CHANNEL 0x0200
+#define CONTROL_CHANNEL 0x0300
+#define CHECK_DATA 0x0400
+
+/* layer 2 -> layer 1 */
+#define PH_ACTIVATE_REQ 0x0101
+#define PH_DEACTIVATE_REQ 0x0201
+#define PH_DATA_REQ 0x2001
+#define MPH_ACTIVATE_REQ 0x0501
+#define MPH_DEACTIVATE_REQ 0x0601
+#define MPH_INFORMATION_REQ 0x0701
+#define PH_CONTROL_REQ 0x0801
+
+/* layer 1 -> layer 2 */
+#define PH_ACTIVATE_IND 0x0102
+#define PH_ACTIVATE_CNF 0x4102
+#define PH_DEACTIVATE_IND 0x0202
+#define PH_DEACTIVATE_CNF 0x4202
+#define PH_DATA_IND 0x2002
+#define PH_DATA_E_IND 0x3002
+#define MPH_ACTIVATE_IND 0x0502
+#define MPH_DEACTIVATE_IND 0x0602
+#define MPH_INFORMATION_IND 0x0702
+#define PH_DATA_CNF 0x6002
+#define PH_CONTROL_IND 0x0802
+#define PH_CONTROL_CNF 0x4802
+
+/* layer 3 -> layer 2 */
+#define DL_ESTABLISH_REQ 0x1004
+#define DL_RELEASE_REQ 0x1104
+#define DL_DATA_REQ 0x3004
+#define DL_UNITDATA_REQ 0x3104
+#define DL_INFORMATION_REQ 0x0004
+
+/* layer 2 -> layer 3 */
+#define DL_ESTABLISH_IND 0x1008
+#define DL_ESTABLISH_CNF 0x5008
+#define DL_RELEASE_IND 0x1108
+#define DL_RELEASE_CNF 0x5108
+#define DL_DATA_IND 0x3008
+#define DL_UNITDATA_IND 0x3108
+#define DL_INFORMATION_IND 0x0008
+
+/* intern layer 2 managment */
+#define MDL_ASSIGN_REQ 0x1804
+#define MDL_ASSIGN_IND 0x1904
+#define MDL_REMOVE_REQ 0x1A04
+#define MDL_REMOVE_IND 0x1B04
+#define MDL_STATUS_UP_IND 0x1C04
+#define MDL_STATUS_DOWN_IND 0x1D04
+#define MDL_STATUS_UI_IND 0x1E04
+#define MDL_ERROR_IND 0x1F04
+#define MDL_ERROR_RSP 0x5F04
+
+/* DL_INFORMATION_IND types */
+#define DL_INFO_L2_CONNECT 0x0001
+#define DL_INFO_L2_REMOVED 0x0002
+
+/* PH_CONTROL types */
+/* TOUCH TONE IS 0x20XX XX "0"..."9", "A","B","C","D","*","#" */
+#define DTMF_TONE_VAL 0x2000
+#define DTMF_TONE_MASK 0x007F
+#define DTMF_TONE_START 0x2100
+#define DTMF_TONE_STOP 0x2200
+#define DTMF_HFC_COEF 0x4000
+#define DSP_CONF_JOIN 0x2403
+#define DSP_CONF_SPLIT 0x2404
+#define DSP_RECEIVE_OFF 0x2405
+#define DSP_RECEIVE_ON 0x2406
+#define DSP_ECHO_ON 0x2407
+#define DSP_ECHO_OFF 0x2408
+#define DSP_MIX_ON 0x2409
+#define DSP_MIX_OFF 0x240a
+#define DSP_DELAY 0x240b
+#define DSP_JITTER 0x240c
+#define DSP_TXDATA_ON 0x240d
+#define DSP_TXDATA_OFF 0x240e
+#define DSP_TX_DEJITTER 0x240f
+#define DSP_TX_DEJ_OFF 0x2410
+#define DSP_TONE_PATT_ON 0x2411
+#define DSP_TONE_PATT_OFF 0x2412
+#define DSP_VOL_CHANGE_TX 0x2413
+#define DSP_VOL_CHANGE_RX 0x2414
+#define DSP_BF_ENABLE_KEY 0x2415
+#define DSP_BF_DISABLE 0x2416
+#define DSP_BF_ACCEPT 0x2416
+#define DSP_BF_REJECT 0x2417
+#define DSP_PIPELINE_CFG 0x2418
+#define HFC_VOL_CHANGE_TX 0x2601
+#define HFC_VOL_CHANGE_RX 0x2602
+#define HFC_SPL_LOOP_ON 0x2603
+#define HFC_SPL_LOOP_OFF 0x2604
+
+/* DSP_TONE_PATT_ON parameter */
+#define TONE_OFF 0x0000
+#define TONE_GERMAN_DIALTONE 0x0001
+#define TONE_GERMAN_OLDDIALTONE 0x0002
+#define TONE_AMERICAN_DIALTONE 0x0003
+#define TONE_GERMAN_DIALPBX 0x0004
+#define TONE_GERMAN_OLDDIALPBX 0x0005
+#define TONE_AMERICAN_DIALPBX 0x0006
+#define TONE_GERMAN_RINGING 0x0007
+#define TONE_GERMAN_OLDRINGING 0x0008
+#define TONE_AMERICAN_RINGPBX 0x000b
+#define TONE_GERMAN_RINGPBX 0x000c
+#define TONE_GERMAN_OLDRINGPBX 0x000d
+#define TONE_AMERICAN_RINGING 0x000e
+#define TONE_GERMAN_BUSY 0x000f
+#define TONE_GERMAN_OLDBUSY 0x0010
+#define TONE_AMERICAN_BUSY 0x0011
+#define TONE_GERMAN_HANGUP 0x0012
+#define TONE_GERMAN_OLDHANGUP 0x0013
+#define TONE_AMERICAN_HANGUP 0x0014
+#define TONE_SPECIAL_INFO 0x0015
+#define TONE_GERMAN_GASSENBESETZT 0x0016
+#define TONE_GERMAN_AUFSCHALTTON 0x0016
+
+/* MPH_INFORMATION_IND */
+#define L1_SIGNAL_LOS_OFF 0x0010
+#define L1_SIGNAL_LOS_ON 0x0011
+#define L1_SIGNAL_AIS_OFF 0x0012
+#define L1_SIGNAL_AIS_ON 0x0013
+#define L1_SIGNAL_RDI_OFF 0x0014
+#define L1_SIGNAL_RDI_ON 0x0015
+#define L1_SIGNAL_SLIP_RX 0x0020
+#define L1_SIGNAL_SLIP_TX 0x0021
+
+/*
+ * protocol ids
+ * D channel 1-31
+ * B channel 33 - 63
+ */
+
+#define ISDN_P_NONE 0
+#define ISDN_P_BASE 0
+#define ISDN_P_TE_S0 0x01
+#define ISDN_P_NT_S0 0x02
+#define ISDN_P_TE_E1 0x03
+#define ISDN_P_NT_E1 0x04
+#define ISDN_P_TE_UP0 0x05
+#define ISDN_P_NT_UP0 0x06
+
+#define IS_ISDN_P_TE(p) ((p == ISDN_P_TE_S0) || (p == ISDN_P_TE_E1) || \
+ (p == ISDN_P_TE_UP0) || (p == ISDN_P_LAPD_TE))
+#define IS_ISDN_P_NT(p) ((p == ISDN_P_NT_S0) || (p == ISDN_P_NT_E1) || \
+ (p == ISDN_P_NT_UP0) || (p == ISDN_P_LAPD_NT))
+#define IS_ISDN_P_S0(p) ((p == ISDN_P_TE_S0) || (p == ISDN_P_NT_S0))
+#define IS_ISDN_P_E1(p) ((p == ISDN_P_TE_E1) || (p == ISDN_P_NT_E1))
+#define IS_ISDN_P_UP0(p) ((p == ISDN_P_TE_UP0) || (p == ISDN_P_NT_UP0))
+
+
+#define ISDN_P_LAPD_TE 0x10
+#define ISDN_P_LAPD_NT 0x11
+
+#define ISDN_P_B_MASK 0x1f
+#define ISDN_P_B_START 0x20
+
+#define ISDN_P_B_RAW 0x21
+#define ISDN_P_B_HDLC 0x22
+#define ISDN_P_B_X75SLP 0x23
+#define ISDN_P_B_L2DTMF 0x24
+#define ISDN_P_B_L2DSP 0x25
+#define ISDN_P_B_L2DSPHDLC 0x26
+
+#define OPTION_L2_PMX 1
+#define OPTION_L2_PTP 2
+#define OPTION_L2_FIXEDTEI 3
+#define OPTION_L2_CLEANUP 4
+
+/* should be in sync with linux/kobject.h:KOBJ_NAME_LEN */
+#define MISDN_MAX_IDLEN 20
+
+struct mISDNhead {
+ unsigned int prim;
+ unsigned int id;
+} __attribute__((packed));
+
+#define MISDN_HEADER_LEN sizeof(struct mISDNhead)
+#define MAX_DATA_SIZE 2048
+#define MAX_DATA_MEM (MAX_DATA_SIZE + MISDN_HEADER_LEN)
+#define MAX_DFRAME_LEN 260
+
+#define MISDN_ID_ADDR_MASK 0xFFFF
+#define MISDN_ID_TEI_MASK 0xFF00
+#define MISDN_ID_SAPI_MASK 0x00FF
+#define MISDN_ID_TEI_ANY 0x7F00
+
+#define MISDN_ID_ANY 0xFFFF
+#define MISDN_ID_NONE 0xFFFE
+
+#define GROUP_TEI 127
+#define TEI_SAPI 63
+#define CTRL_SAPI 0
+
+#define MISDN_MAX_CHANNEL 127
+#define MISDN_CHMAP_SIZE ((MISDN_MAX_CHANNEL + 1) >> 3)
+
+#define SOL_MISDN 0
+
+struct sockaddr_mISDN {
+ sa_family_t family;
+ unsigned char dev;
+ unsigned char channel;
+ unsigned char sapi;
+ unsigned char tei;
+};
+
+struct mISDNversion {
+ unsigned char major;
+ unsigned char minor;
+ unsigned short release;
+};
+
+#define MAX_DEVICE_ID 63
+
+struct mISDN_devinfo {
+ u_int id;
+ u_int Dprotocols;
+ u_int Bprotocols;
+ u_int protocol;
+ u_char channelmap[MISDN_CHMAP_SIZE];
+ u_int nrbchan;
+ char name[MISDN_MAX_IDLEN];
+};
+
+struct mISDN_devrename {
+ u_int id;
+ char name[MISDN_MAX_IDLEN];
+};
+
+struct ph_info_ch {
+ int32_t protocol;
+ int64_t Flags;
+};
+
+struct ph_info_dch {
+ struct ph_info_ch ch;
+ int16_t state;
+ int16_t num_bch;
+};
+
+struct ph_info {
+ struct ph_info_dch dch;
+ struct ph_info_ch bch[];
+};
+
+/* timer device ioctl */
+#define IMADDTIMER _IOR('I', 64, int)
+#define IMDELTIMER _IOR('I', 65, int)
+/* socket ioctls */
+#define IMGETVERSION _IOR('I', 66, int)
+#define IMGETCOUNT _IOR('I', 67, int)
+#define IMGETDEVINFO _IOR('I', 68, int)
+#define IMCTRLREQ _IOR('I', 69, int)
+#define IMCLEAR_L2 _IOR('I', 70, int)
+#define IMSETDEVNAME _IOR('I', 71, struct mISDN_devrename)
+
+static inline int
+test_channelmap(u_int nr, u_char *map)
+{
+ if (nr <= MISDN_MAX_CHANNEL)
+ return map[nr >> 3] & (1 << (nr & 7));
+ else
+ return 0;
+}
+
+static inline void
+set_channelmap(u_int nr, u_char *map)
+{
+ map[nr >> 3] |= (1 << (nr & 7));
+}
+
+static inline void
+clear_channelmap(u_int nr, u_char *map)
+{
+ map[nr >> 3] &= ~(1 << (nr & 7));
+}
+
+/* CONTROL_CHANNEL parameters */
+#define MISDN_CTRL_GETOP 0x0000
+#define MISDN_CTRL_LOOP 0x0001
+#define MISDN_CTRL_CONNECT 0x0002
+#define MISDN_CTRL_DISCONNECT 0x0004
+#define MISDN_CTRL_PCMCONNECT 0x0010
+#define MISDN_CTRL_PCMDISCONNECT 0x0020
+#define MISDN_CTRL_SETPEER 0x0040
+#define MISDN_CTRL_UNSETPEER 0x0080
+#define MISDN_CTRL_RX_OFF 0x0100
+#define MISDN_CTRL_FILL_EMPTY 0x0200
+#define MISDN_CTRL_GETPEER 0x0400
+#define MISDN_CTRL_HW_FEATURES_OP 0x2000
+#define MISDN_CTRL_HW_FEATURES 0x2001
+#define MISDN_CTRL_HFC_OP 0x4000
+#define MISDN_CTRL_HFC_PCM_CONN 0x4001
+#define MISDN_CTRL_HFC_PCM_DISC 0x4002
+#define MISDN_CTRL_HFC_CONF_JOIN 0x4003
+#define MISDN_CTRL_HFC_CONF_SPLIT 0x4004
+#define MISDN_CTRL_HFC_RECEIVE_OFF 0x4005
+#define MISDN_CTRL_HFC_RECEIVE_ON 0x4006
+#define MISDN_CTRL_HFC_ECHOCAN_ON 0x4007
+#define MISDN_CTRL_HFC_ECHOCAN_OFF 0x4008
+
+
+/* socket options */
+#define MISDN_TIME_STAMP 0x0001
+
+struct mISDN_ctrl_req {
+ int op;
+ int channel;
+ int p1;
+ int p2;
+};
+
+/* muxer options */
+#define MISDN_OPT_ALL 1
+#define MISDN_OPT_TEIMGR 2
+
+#endif /* mISDNIF_H */
diff --git a/include/osmocom/Makefile.am b/include/osmocom/Makefile.am
new file mode 100644
index 0000000..999a3ee
--- /dev/null
+++ b/include/osmocom/Makefile.am
@@ -0,0 +1 @@
+SUBDIRS=gsm
diff --git a/include/osmocom/gsm/Makefile.am b/include/osmocom/gsm/Makefile.am
new file mode 100644
index 0000000..f9d5e7c
--- /dev/null
+++ b/include/osmocom/gsm/Makefile.am
@@ -0,0 +1 @@
+SUBDIRS=abis
diff --git a/include/osmocom/gsm/abis/Makefile.am b/include/osmocom/gsm/abis/Makefile.am
new file mode 100644
index 0000000..8bdcc96
--- /dev/null
+++ b/include/osmocom/gsm/abis/Makefile.am
@@ -0,0 +1,3 @@
+osmoabis_HEADERS = e1_input.h subchan_demux.h ipaccess.h trau_frame.h
+
+osmoabisdir = $(includedir)/osmocom/gsm/abis
diff --git a/include/osmocom/gsm/abis/e1_input.h b/include/osmocom/gsm/abis/e1_input.h
new file mode 100644
index 0000000..1911568
--- /dev/null
+++ b/include/osmocom/gsm/abis/e1_input.h
@@ -0,0 +1,226 @@
+#ifndef _E1_INPUT_H
+#define _E1_INPUT_H
+
+#include <stdlib.h>
+#include <netinet/in.h>
+
+#include <osmocom/core/linuxlist.h>
+//#include <openbsc/gsm_data.h>
+#include <osmocom/core/timer.h>
+#include <osmocom/core/msgb.h>
+#include <osmocom/core/select.h>
+#include <osmocom/gsm/abis/subchan_demux.h>
+
+#define NUM_E1_TS 32
+
+enum e1inp_sign_type {
+ E1INP_SIGN_NONE,
+ E1INP_SIGN_OML,
+ E1INP_SIGN_RSL,
+};
+const char *e1inp_signtype_name(enum e1inp_sign_type tp);
+
+struct e1inp_ts;
+
+struct e1inp_sign_link {
+ /* list of signalling links */
+ struct llist_head list;
+
+ /* to which timeslot do we belong? */
+ struct e1inp_ts *ts;
+
+ enum e1inp_sign_type type;
+
+ /* trx for msg->trx of received msgs */
+ struct gsm_bts_trx *trx;
+
+ /* msgb queue of to-be-transmitted msgs */
+ struct llist_head tx_list;
+
+ /* SAPI and TEI on the E1 TS */
+ uint8_t sapi;
+ uint8_t tei;
+
+ union {
+ struct {
+ uint8_t channel;
+ } misdn;
+ } driver;
+};
+
+enum e1inp_ts_type {
+ E1INP_TS_TYPE_NONE,
+ E1INP_TS_TYPE_SIGN,
+ E1INP_TS_TYPE_TRAU,
+};
+const char *e1inp_tstype_name(enum e1inp_ts_type tp);
+
+/* A timeslot in the E1 interface */
+struct e1inp_ts {
+ enum e1inp_ts_type type;
+ int num;
+
+ /* to which line do we belong ? */
+ struct e1inp_line *line;
+
+ union {
+ struct {
+ /* list of all signalling links on this TS */
+ struct llist_head sign_links;
+ /* delay for the queue */
+ int delay;
+ /* timer when to dequeue next frame */
+ struct osmo_timer_list tx_timer;
+ } sign;
+ struct {
+ /* subchannel demuxer for frames from E1 */
+ struct subch_demux demux;
+ /* subchannel muxer for frames to E1 */
+ struct subch_mux mux;
+ } trau;
+ };
+ union {
+ struct {
+ /* mISDN driver has one fd for each ts */
+ struct osmo_fd fd;
+ } misdn;
+ struct {
+ /* ip.access driver has one fd for each ts */
+ struct osmo_fd fd;
+ } ipaccess;
+ struct {
+ /* DAHDI driver has one fd for each ts */
+ struct osmo_fd fd;
+ struct lapd_instance *lapd;
+ } dahdi;
+ } driver;
+};
+
+struct gsm_e1_subslot {
+ /* Number of E1 link */
+ uint8_t e1_nr;
+ /* Number of E1 TS inside E1 link */
+ uint8_t e1_ts;
+ /* Sub-slot within the E1 TS, 0xff if full TS */
+ uint8_t e1_ts_ss;
+};
+
+enum e1inp_line_role {
+ E1INP_LINE_R_NONE,
+ E1INP_LINE_R_BSC,
+ E1INP_LINE_R_BTS,
+ E1INP_LINE_R_MAX
+};
+
+struct e1inp_driver {
+ struct llist_head list;
+ const char *name;
+ int (*want_write)(struct e1inp_ts *ts);
+ int (*line_update)(struct e1inp_line *line, enum e1inp_line_role role);
+ int default_delay;
+};
+
+struct e1inp_line {
+ struct llist_head list;
+ int refcnt;
+
+ unsigned int num;
+ const char *name;
+
+ /* array of timestlots */
+ struct e1inp_ts ts[NUM_E1_TS];
+
+ int (*rx)(struct msgb *msg, struct e1inp_ts *ts);
+ int (*rx_err)(int error);
+
+ struct e1inp_driver *driver;
+ void *driver_data;
+};
+
+/* SS_INPUT signals */
+enum signal_input {
+ S_INP_NONE,
+ S_INP_TEI_UP,
+ S_INP_TEI_DN,
+ S_INP_LINE_INIT,
+ S_INP_LINE_ALARM,
+ S_INP_LINE_NOALARM,
+};
+
+/* register a driver with the E1 core */
+int e1inp_driver_register(struct e1inp_driver *drv);
+
+/* fine a previously registered driver */
+struct e1inp_driver *e1inp_driver_find(const char *name);
+
+/* register a line with the E1 core */
+int e1inp_line_register(struct e1inp_line *line);
+
+/* get a line by its ID */
+struct e1inp_line *e1inp_line_get(uint8_t e1_nr);
+
+/* create a line in the E1 input core */
+struct e1inp_line *e1inp_line_create(uint8_t e1_nr, const char *driver_name, int (*rx)(struct msgb *msg, struct e1inp_ts *ts), int (*rx_err)(int error));
+
+/* find a sign_link for given TEI and SAPI in a TS */
+struct e1inp_sign_link *
+e1inp_lookup_sign_link(struct e1inp_ts *ts, uint8_t tei,
+ uint8_t sapi);
+
+/* 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, uint8_t tei,
+ uint8_t sapi);
+
+/* configure and initialize one e1inp_ts */
+int e1inp_ts_config_sign(struct e1inp_ts *ts, struct e1inp_line *line);
+int e1inp_ts_config_trau(struct e1inp_ts *ts, struct e1inp_line *line,
+ int (*subch_cb)(struct subch_demux *dmx, int ch,
+ uint8_t *data, int len, void *_priv));
+
+/* Call from the Stack: configuration of this TS has changed */
+int e1inp_update_ts(struct e1inp_ts *ts);
+
+/* Receive a packet from the E1 driver */
+int e1inp_rx_ts(struct e1inp_ts *ts, struct msgb *msg,
+ uint8_t tei, uint8_t sapi);
+
+/* 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);
+
+/* called by driver in case some kind of link state event */
+int e1inp_event(struct e1inp_ts *ts, int evt, uint8_t tei, uint8_t sapi);
+
+/* Write LAPD frames to the fd. */
+void e1_set_pcap_fd(int fd);
+
+/* called by TRAU muxer to obtain the destination mux entity */
+struct subch_mux *e1inp_get_mux(uint8_t e1_nr, uint8_t ts_nr);
+
+void e1inp_sign_link_destroy(struct e1inp_sign_link *link);
+int e1inp_line_update(struct e1inp_line *line, enum e1inp_line_role role);
+
+struct gsm_network;
+int ipaccess_setup(struct gsm_network *gsmnet);
+int hsl_setup(struct gsm_network *gsmnet);
+
+extern struct llist_head e1inp_driver_list;
+extern struct llist_head e1inp_line_list;
+
+int e1inp_vty_init(void);
+void e1inp_init(void);
+
+int _abis_nm_sendmsg(struct msgb *msg, int to_trx_oml);
+
+/* XXX */
+struct input_signal_data {
+ int link_type;
+ uint8_t tei;
+ uint8_t sapi;
+ struct gsm_bts_trx *trx;
+ struct e1inp_line *line;
+};
+
+#endif /* _E1_INPUT_H */
diff --git a/include/osmocom/gsm/abis/ipaccess.h b/include/osmocom/gsm/abis/ipaccess.h
new file mode 100644
index 0000000..2792572
--- /dev/null
+++ b/include/osmocom/gsm/abis/ipaccess.h
@@ -0,0 +1,93 @@
+#ifndef _OSMO_PROTO_IPACCESS_H
+#define _OSMO_PROTO_IPACCESS_H
+
+#include <stdint.h>
+
+#define IPA_TCP_PORT_OML 3002
+#define IPA_TCP_PORT_RSL 3003
+
+struct ipaccess_head {
+ uint16_t len; /* network byte order */
+ uint8_t proto;
+ uint8_t data[0];
+} __attribute__ ((packed));
+
+struct ipaccess_head_ext {
+ uint8_t proto;
+ uint8_t data[0];
+} __attribute__ ((packed));
+
+enum ipaccess_proto {
+ IPAC_PROTO_RSL = 0x00,
+ IPAC_PROTO_IPACCESS = 0xfe,
+ IPAC_PROTO_SCCP = 0xfd,
+ IPAC_PROTO_OML = 0xff,
+
+
+ /* OpenBSC extensions */
+ IPAC_PROTO_OSMO = 0xee,
+ IPAC_PROTO_MGCP_OLD = 0xfc,
+};
+
+enum ipaccess_proto_ext {
+ IPAC_PROTO_EXT_CTRL = 0x00,
+ IPAC_PROTO_EXT_MGCP = 0x01,
+ IPAC_PROTO_EXT_LAC = 0x02,
+};
+
+enum ipaccess_msgtype {
+ IPAC_MSGT_PING = 0x00,
+ IPAC_MSGT_PONG = 0x01,
+ IPAC_MSGT_ID_GET = 0x04,
+ IPAC_MSGT_ID_RESP = 0x05,
+ IPAC_MSGT_ID_ACK = 0x06,
+
+ /* OpenBSC extension */
+ IPAC_MSGT_SCCP_OLD = 0xff,
+};
+
+enum ipaccess_id_tags {
+ IPAC_IDTAG_SERNR = 0x00,
+ IPAC_IDTAG_UNITNAME = 0x01,
+ IPAC_IDTAG_LOCATION1 = 0x02,
+ IPAC_IDTAG_LOCATION2 = 0x03,
+ IPAC_IDTAG_EQUIPVERS = 0x04,
+ IPAC_IDTAG_SWVERSION = 0x05,
+ IPAC_IDTAG_IPADDR = 0x06,
+ IPAC_IDTAG_MACADDR = 0x07,
+ IPAC_IDTAG_UNIT = 0x08,
+};
+
+/*
+ * Firmware specific header
+ */
+struct sdp_firmware {
+ char magic[4];
+ char more_magic[2];
+ uint16_t more_more_magic;
+ uint32_t header_length;
+ uint32_t file_length;
+ char sw_part[20];
+ char text1[64];
+ char time[12];
+ char date[14];
+ char text2[10];
+ char version[20];
+ uint16_t table_offset;
+ /* stuff i don't know */
+} __attribute__((packed));
+
+struct sdp_header_entry {
+ uint16_t something1;
+ char text1[64];
+ char time[12];
+ char date[14];
+ char text2[10];
+ char version[20];
+ uint32_t length;
+ uint32_t addr1;
+ uint32_t addr2;
+ uint32_t start;
+} __attribute__((packed));
+
+#endif /* _OSMO_PROTO_IPACCESS_H */
diff --git a/include/osmocom/gsm/abis/subchan_demux.h b/include/osmocom/gsm/abis/subchan_demux.h
new file mode 100644
index 0000000..b71c856
--- /dev/null
+++ b/include/osmocom/gsm/abis/subchan_demux.h
@@ -0,0 +1,101 @@
+#ifndef _SUBCH_DEMUX_H
+#define _SUBCH_DEMUX_H
+/* A E1 sub-channel (de)multiplexer with TRAU frame sync */
+
+/* (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 <osmocom/core/linuxlist.h>
+
+#define NR_SUBCH 4
+#define TRAU_FRAME_SIZE 40
+#define TRAU_FRAME_BITS (TRAU_FRAME_SIZE*8)
+
+/***********************************************************************/
+/* DEMULTIPLEXER */
+/***********************************************************************/
+
+struct demux_subch {
+ uint8_t out_bitbuf[TRAU_FRAME_BITS];
+ uint16_t out_idx; /* next bit to be written in out_bitbuf */
+ /* number of consecutive zeros that we have received (for sync) */
+ unsigned int consecutive_zeros;
+ /* are we in TRAU frame sync or not? */
+ unsigned int in_sync;
+};
+
+struct subch_demux {
+ /* bitmask of currently active subchannels */
+ uint8_t chan_activ;
+ /* one demux_subch struct for every subchannel */
+ struct demux_subch subch[NR_SUBCH];
+ /* callback to be called once we have received a complete
+ * frame on a given subchannel */
+ int (*out_cb)(struct subch_demux *dmx, int ch, uint8_t *data, int len,
+ void *);
+ /* user-provided data, transparently passed to out_cb() */
+ void *data;
+};
+
+/* initialize one demultiplexer instance */
+int subch_demux_init(struct subch_demux *dmx);
+
+/* feed 'len' number of muxed bytes into the demultiplexer */
+int subch_demux_in(struct subch_demux *dmx, uint8_t *data, int len);
+
+/* activate decoding/processing for one subchannel */
+int subch_demux_activate(struct subch_demux *dmx, int subch);
+
+/* deactivate decoding/processing for one subchannel */
+int subch_demux_deactivate(struct subch_demux *dmx, int subch);
+
+/***********************************************************************/
+/* MULTIPLEXER */
+/***********************************************************************/
+
+/* one element in the tx_queue of a muxer sub-channel */
+struct subch_txq_entry {
+ struct llist_head list;
+
+ unsigned int bit_len; /* total number of bits in 'bits' */
+ unsigned int next_bit; /* next bit to be transmitted */
+
+ uint8_t bits[0]; /* one bit per byte */
+};
+
+struct mux_subch {
+ struct llist_head tx_queue;
+};
+
+/* structure representing one instance of the subchannel muxer */
+struct subch_mux {
+ struct mux_subch subch[NR_SUBCH];
+};
+
+/* initialize a subchannel muxer instance */
+int subchan_mux_init(struct subch_mux *mx);
+
+/* request the output of 'len' multiplexed bytes */
+int subchan_mux_out(struct subch_mux *mx, uint8_t *data, int len);
+
+/* enqueue some data into one sub-channel of the muxer */
+int subchan_mux_enqueue(struct subch_mux *mx, int s_nr, const uint8_t *data,
+ int len);
+
+#endif /* _SUBCH_DEMUX_H */
diff --git a/include/osmocom/gsm/abis/trau_frame.h b/include/osmocom/gsm/abis/trau_frame.h
new file mode 100644
index 0000000..a76da33
--- /dev/null
+++ b/include/osmocom/gsm/abis/trau_frame.h
@@ -0,0 +1,63 @@
+#ifndef _TRAU_FRAME_H
+#define _TRAU_FRAME_H
+/* TRAU frame handling according to GSM TS 08.60 */
+
+/* (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>
+
+/* 21 for FR/EFR, 25 for AMR, 15 for OM, 15 for data, 13 for E-data, 21 idle */
+#define MAX_C_BITS 25
+/* 260 for FR/EFR, 256 for AMR, 264 for OM, 288 for E-data */
+#define MAX_D_BITS 288
+/* for all speech frames */
+#define MAX_T_BITS 4
+/* for OM */
+#define MAX_S_BITS 6
+/* for E-data */
+#define MAX_M_BITS 2
+
+struct decoded_trau_frame {
+ uint8_t c_bits[MAX_C_BITS];
+ uint8_t d_bits[MAX_D_BITS];
+ uint8_t t_bits[MAX_T_BITS];
+ uint8_t s_bits[MAX_S_BITS];
+ uint8_t m_bits[MAX_M_BITS];
+};
+
+#define TRAU_FT_FR_UP 0x02 /* 0 0 0 1 0 - 3.5.1.1.1 */
+#define TRAU_FT_FR_DOWN 0x1c /* 1 1 1 0 0 - 3.5.1.1.1 */
+#define TRAU_FT_EFR 0x1a /* 1 1 0 1 0 - 3.5.1.1.1 */
+#define TRAU_FT_AMR 0x06 /* 0 0 1 1 0 - 3.5.1.2 */
+#define TRAU_FT_OM_UP 0x07 /* 0 0 1 0 1 - 3.5.2 */
+#define TRAU_FT_OM_DOWN 0x1b /* 1 1 0 1 1 - 3.5.2 */
+#define TRAU_FT_DATA_UP 0x08 /* 0 1 0 0 0 - 3.5.3 */
+#define TRAU_FT_DATA_DOWN 0x16 /* 1 0 1 1 0 - 3.5.3 */
+#define TRAU_FT_D145_SYNC 0x14 /* 1 0 1 0 0 - 3.5.3 */
+#define TRAU_FT_EDATA 0x1f /* 1 1 1 1 1 - 3.5.4 */
+#define TRAU_FT_IDLE_UP 0x10 /* 1 0 0 0 0 - 3.5.5 */
+#define TRAU_FT_IDLE_DOWN 0x0e /* 0 1 1 1 0 - 3.5.5 */
+
+
+int decode_trau_frame(struct decoded_trau_frame *fr, const uint8_t *trau_bits);
+int encode_trau_frame(uint8_t *trau_bits, const struct decoded_trau_frame *fr);
+int trau_frame_up2down(struct decoded_trau_frame *fr);
+
+
+#endif /* _TRAU_FRAME_H */
diff --git a/libosmoabis.pc.in b/libosmoabis.pc.in
new file mode 100644
index 0000000..751149d
--- /dev/null
+++ b/libosmoabis.pc.in
@@ -0,0 +1,11 @@
+prefix=@prefix@
+exec_prefix=@exec_prefix@
+libdir=@libdir@
+includedir=@includedir@
+
+Name: A-bis Core Library
+Description: C Utility Library
+Version: @VERSION@
+Libs: -L${libdir} -losmoabis
+Cflags: -I${includedir}/
+
diff --git a/src/Makefile.am b/src/Makefile.am
new file mode 100644
index 0000000..292d01e
--- /dev/null
+++ b/src/Makefile.am
@@ -0,0 +1,17 @@
+SUBDIRS=input
+
+# This is _NOT_ the library release version, it's an API version.
+# Please read Chapter 6 "Library interface versions" of the libtool documentation before making any modification
+LIBVERSION=0:0:0
+
+INCLUDES = $(all_includes) -I$(top_srcdir)/include -I$(top_builddir)
+AM_CFLAGS= -fPIC -Wall $(LIBOSMOCORE_CFLAGS) $(LIBOSMOGSM_CFLAGS) $(LIBOSMOVTY_CFLAGS) $(COVERAGE_CFLAGS)
+AM_LDFLAGS = $(LIBOSMOCORE_LIBS) $(LIBOSMOGSM_LIBS) $(COVERAGE_LDFLAGS)
+
+lib_LTLIBRARIES = libosmoabis.la
+
+libosmoabis_la_LIBADD = input/libosmoabis-input.la
+libosmoabis_la_SOURCES = e1_input.c \
+ subchan_demux.c \
+ trau_frame.c \
+ socket.c
diff --git a/src/e1_input.c b/src/e1_input.c
new file mode 100644
index 0000000..d806766
--- /dev/null
+++ b/src/e1_input.c
@@ -0,0 +1,628 @@
+/* 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 "internal.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/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 <osmocom/core/select.h>
+#include <osmocom/core/msgb.h>
+#include <osmocom/core/logging.h>
+#include <osmocom/core/signal.h>
+//#include <openbsc/debug.h>
+//#include <openbsc/gsm_data.h>
+#include <osmocom/gsm/abis/e1_input.h>
+//#include <openbsc/abis_nm.h>
+//#include <openbsc/abis_rsl.h>
+#include <osmocom/core/linuxlist.h>
+#include <osmocom/gsm/abis/subchan_demux.h>
+//#include <openbsc/trau_frame.h>
+//#include <openbsc/trau_mux.h>
+#include <talloc.h>
+//#include <openbsc/signal.h>
+//#include <openbsc/misdn.h>
+
+//#include "../../bscconfig.h"
+
+#define NUM_E1_TS 32
+
+static void *tall_e1inp_ctx;
+
+/* 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 {
+ uint32_t magic_number;
+ uint16_t version_major;
+ uint16_t version_minor;
+ int32_t thiszone;
+ uint32_t sigfigs;
+ uint32_t snaplen;
+ uint32_t network;
+} __attribute__((packed));
+
+struct pcaprec_hdr {
+ uint32_t ts_sec;
+ uint32_t ts_usec;
+ uint32_t incl_len;
+ uint32_t orig_len;
+} __attribute__((packed));
+
+struct fake_linux_lapd_header {
+ uint16_t pkttype;
+ uint16_t hatype;
+ uint16_t halen;
+ uint64_t addr;
+ int16_t protocol;
+} __attribute__((packed));
+
+struct lapd_header {
+ uint8_t ea1 : 1;
+ uint8_t cr : 1;
+ uint8_t sapi : 6;
+ uint8_t ea2 : 1;
+ uint8_t tei : 7;
+ uint8_t control_foo; /* fake UM's ... */
+} __attribute__((packed));
+
+osmo_static_assert(offsetof(struct fake_linux_lapd_header, hatype) == 2, hatype_offset);
+osmo_static_assert(offsetof(struct fake_linux_lapd_header, halen) == 4, halen_offset);
+osmo_static_assert(offsetof(struct fake_linux_lapd_header, addr) == 6, addr_offset);
+osmo_static_assert(offsetof(struct fake_linux_lapd_header, protocol) == 14, proto_offset);
+osmo_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];
+}
+
+int abis_rsl_sendmsg(struct msgb *msg)
+{
+ struct e1inp_sign_link *sign_link = msg->dst;
+ struct e1inp_driver *e1inp_driver;
+ struct e1inp_ts *e1i_ts;
+;
+ msg->l2h = msg->data;
+
+ /* don't know how to route this message. */
+ if (sign_link == NULL) {
+ LOGP(DRSL, LOGL_ERROR, "rsl_sendmsg: msg->trx == NULL: %s\n",
+ osmo_hexdump(msg->data, msg->len));
+ talloc_free(msg);
+ return -EINVAL;
+ }
+ e1i_ts = sign_link->ts;
+ if (!osmo_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)
+{
+ struct e1inp_sign_link *sign_link = msg->dst;
+ struct e1inp_driver *e1inp_driver;
+ struct e1inp_ts *e1i_ts;
+
+ msg->l2h = msg->data;
+
+ if (!sign_link) {
+ LOGP(DNM, LOGL_ERROR, "nm_sendmsg: msg->trx == NULL\n");
+ return -EINVAL;
+ }
+
+ e1i_ts = sign_link->ts;
+ if (!osmo_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 */
+int e1inp_ts_config_trau(struct e1inp_ts *ts, struct e1inp_line *line,
+ int (*subch_cb)(struct subch_demux *dmx, int ch,
+ uint8_t *data, int len, void *_priv))
+{
+ if (ts->type == E1INP_TS_TYPE_TRAU && ts->line && line)
+ return 0;
+
+ ts->type = E1INP_TS_TYPE_TRAU;
+ ts->line = line;
+
+ subchan_mux_init(&ts->trau.mux);
+ ts->trau.demux.out_cb = subch_cb;
+ ts->trau.demux.data = ts;
+ subch_demux_init(&ts->trau.demux);
+ return 0;
+}
+
+int e1inp_ts_config_sign(struct e1inp_ts *ts, struct e1inp_line *line)
+{
+ if (ts->type == E1INP_TS_TYPE_SIGN && ts->line && line)
+ return 0;
+
+ ts->type = E1INP_TS_TYPE_SIGN;
+ ts->line = line;
+
+ if (line && line->driver)
+ ts->sign.delay = line->driver->default_delay;
+ else
+ ts->sign.delay = 100000;
+ INIT_LLIST_HEAD(&ts->sign.sign_links);
+ return 0;
+}
+
+struct e1inp_line *e1inp_line_get(uint8_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(uint8_t e1_nr, const char *driver_name,
+ int (*rx)(struct msgb *msgb, struct e1inp_ts *ts),
+ int (*rx_err)(int error))
+{
+ 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_e1inp_ctx, struct e1inp_line);
+ if (!line)
+ return NULL;
+
+ line->driver = driver;
+ line->rx = rx;
+ line->rx_err = rx_err;
+
+ 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(uint8_t e1_nr)
+{
+ struct e1inp_line *line;
+ int i;
+
+ line = e1inp_line_get(e1_nr);
+ if (line)
+ return line;
+
+ line = talloc_zero(tall_e1inp_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(uint8_t e1_nr, uint8_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(uint8_t e1_nr, uint8_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,
+ uint8_t tei, uint8_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, uint8_t tei,
+ uint8_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)
+ osmo_timer_del(&link->ts->sign.tx_timer);
+
+ talloc_free(link);
+}
+
+/* XXX */
+/* the E1 driver tells us he has received something on a TS */
+int e1inp_rx_ts(struct e1inp_ts *ts, struct msgb *msg,
+ uint8_t tei, uint8_t sapi)
+{
+ struct e1inp_sign_link *link;
+ int ret = 0;
+
+ 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);
+ if (!ts->line->rx)
+ printf("XXX Error, horror\n");
+
+ ts->line->rx(msg, ts);
+ break;
+ case E1INP_TS_TYPE_TRAU:
+ ts->line->rx(msg, ts);
+// 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, uint8_t tei, uint8_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 */
+ osmo_signal_dispatch(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, enum e1inp_line_role role)
+{
+ struct input_signal_data isd;
+ int rc;
+
+ /* This line has been already initialized, skip this. */
+ if (++line->refcnt > 1)
+ return 0;
+
+ if (line->driver && line->driver->line_update)
+ rc = line->driver->line_update(line, role);
+ else
+ rc = 0;
+
+ /* Send a signal to anyone who is interested in new lines being
+ * configured */
+ memset(&isd, 0, sizeof(isd));
+ isd.line = line;
+ osmo_signal_dispatch(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_ipaccess_init(void);
+void e1inp_hsl_init(void);
+
+void e1inp_init(void)
+{
+ tall_sigl_ctx = talloc_named_const(tall_e1inp_ctx, 1,
+ "e1inp_sign_link");
+ osmo_signal_register_handler(SS_GLOBAL, e1i_sig_cb, NULL);
+
+ e1inp_misdn_init();
+#ifdef HAVE_DAHDI_USER_H
+ e1inp_dahdi_init();
+#endif
+ e1inp_ipaccess_init();
+ e1inp_hsl_init();
+}
diff --git a/src/input/Makefile.am b/src/input/Makefile.am
new file mode 100644
index 0000000..8e9e336
--- /dev/null
+++ b/src/input/Makefile.am
@@ -0,0 +1,11 @@
+noinst_LTLIBRARIES = libosmoabis-input.la
+
+INCLUDES = $(all_includes) -I$(top_srcdir)/include -I$(top_builddir)
+AM_CFLAGS= -fPIC -Wall $(LIBOSMOCORE_CFLAGS) $(LIBOSMOGSM_CFLAGS) $(LIBOSMOVTY_CFLAGS) $(COVERAGE_CFLAGS)
+AM_LDFLAGS = $(LIBOSMOCORE_LIBS) $(LIBOSMOGSM_LIBS) $(COVERAGE_LDFLAGS)
+
+libosmoabis_input_la_SOURCES = dahdi.c \
+ hsl.c \
+ ipaccess.c \
+ lapd.c \
+ misdn.c
diff --git a/src/input/dahdi.c b/src/input/dahdi.c
new file mode 100644
index 0000000..a431a3a
--- /dev/null
+++ b/src/input/dahdi.c
@@ -0,0 +1,495 @@
+/* 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/socket.h>
+#include <sys/ioctl.h>
+#include <arpa/inet.h>
+#include <dahdi/user.h>
+
+#include <osmocom/core/select.h>
+#include <osmocom/core/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 <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 */
+ osmo_signal_dispatch(SS_INPUT, S_INP_LINE_ALARM, &isd);
+ break;
+ case DAHDI_EVENT_NOALARM:
+ /* alarm has gone, we should re-start the SABM requests */
+ osmo_signal_dispatch(SS_INPUT, S_INP_LINE_NOALARM, &isd);
+ break;
+ }
+}
+
+static int handle_ts1_read(struct osmo_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", osmo_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 osmo_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 osmo_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", osmo_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;
+ osmo_timer_schedule(&e1i_ts->sign.tx_timer, 0, 50000);
+
+ return 0;
+}
+
+
+static int invertbits = 1;
+
+static uint8_t flip_table[256];
+
+static void init_flip_bits(void)
+{
+ int i,k;
+
+ for (i = 0 ; i < 256 ; i++) {
+ uint8_t sample = 0 ;
+ for (k = 0; k<8; k++) {
+ if ( i & 1 << k ) sample |= 0x80 >> k;
+ }
+ flip_table[i] = sample;
+ }
+}
+
+static uint8_t * flip_buf_bits ( uint8_t * buf , int len)
+{
+ int i;
+ uint8_t * start = buf;
+
+ for (i = 0 ; i < len; i++) {
+ buf[i] = flip_table[(uint8_t)buf[i]];
+ }
+
+ return start;
+}
+
+#define D_BCHAN_TX_GRAN 160
+/* write to a B channel TS */
+static int handle_tsX_write(struct osmo_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];
+ uint8_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",
+ osmo_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 osmo_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",
+ osmo_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 osmo_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, enum e1inp_line_role role);
+
+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 osmo_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 = osmo_fd_register(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, enum e1inp_line_role role)
+{
+ 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/input/hsl.c b/src/input/hsl.c
new file mode 100644
index 0000000..2ff9d39
--- /dev/null
+++ b/src/input/hsl.c
@@ -0,0 +1,296 @@
+/* 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 "internal.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/socket.h>
+#include <sys/ioctl.h>
+#include <arpa/inet.h>
+
+#include <osmocom/core/select.h>
+#include <osmocom/gsm/tlv.h>
+#include <osmocom/core/msgb.h>
+#include <osmocom/gsm/abis/e1_input.h>
+#include <osmocom/core/logging.h>
+#include <osmocom/gsm/protocol/ipaccess.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 <talloc.h>
+
+#define HSL_TCP_PORT 2500
+#define HSL_PROTO_DEBUG 0xdd
+
+#define PRIV_OML 1
+#define PRIV_RSL 2
+
+static void *tall_bsc_ctx;
+
+/* data structure for one E1 interface with A-bis */
+struct hsl_e1_handle {
+ struct osmo_fd listen_fd;
+ struct gsm_network *gsmnet;
+};
+
+static struct hsl_e1_handle *e1h;
+
+
+#define TS1_ALLOC_SIZE 900
+
+static int handle_ts1_read(struct osmo_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;
+ int ret = 0, error;
+
+ msg = ipaccess_read_msg(bfd, &error);
+ if (!msg) {
+ if (e1i_ts->line->rx_err)
+ e1i_ts->line->rx_err(error);
+ if (error == 0) {
+ osmo_fd_unregister(bfd);
+ close(bfd->fd);
+ bfd->fd = -1;
+ }
+ return error;
+ }
+ DEBUGP(DMI, "RX %u: %s\n", ts_nr, osmo_hexdump(msgb_l2(msg), msgb_l2len(msg)));
+
+ /* XXX better use e1inp_rx_ts. */
+ if (e1i_ts->line->rx)
+ e1i_ts->line->rx(msg, e1i_ts);
+
+ 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 osmo_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;
+ uint8_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, osmo_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. */
+ osmo_timer_schedule(&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 osmo_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;
+}
+
+static int hsl_line_update(struct e1inp_line *line, enum e1inp_line_role role);
+
+struct e1inp_driver hsl_driver = {
+ .name = "hsl",
+ .want_write = ts_want_write,
+ .line_update = hsl_line_update,
+ .default_delay = 0,
+};
+
+/* callback of the OML listening filedescriptor */
+static int listen_fd_cb(struct osmo_fd *listen_bfd, unsigned int what)
+{
+ int ret;
+ int idx = 0;
+ int i;
+ struct e1inp_line *line = listen_bfd->data;
+ struct e1inp_ts *e1i_ts;
+ struct osmo_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));
+
+ /* create virrtual E1 timeslots for signalling */
+ e1inp_ts_config_sign(&line->ts[1-1], line);
+
+ /* 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 = osmo_fd_register(bfd);
+ if (ret < 0) {
+ LOGP(DINP, LOGL_ERROR, "could not register FD\n");
+ close(bfd->fd);
+ talloc_free(line);
+ return ret;
+ }
+
+ return ret;
+}
+
+static int
+hsl_line_update(struct e1inp_line *line, enum e1inp_line_role role)
+{
+ int ret = -ENOENT;
+
+ switch(role) {
+ case E1INP_LINE_R_BSC:
+ ret = make_sock(&e1h->listen_fd, IPPROTO_TCP, INADDR_ANY,
+ HSL_TCP_PORT, 0, listen_fd_cb, line);
+ break;
+ case E1INP_LINE_R_BTS:
+ /* XXX: not implemented yet. */
+ break;
+ default:
+ break;
+ }
+ return ret;
+}
+
+int hsl_setup(struct gsm_network *gsmnet)
+{
+ e1h->gsmnet = gsmnet;
+ return 0;
+}
+
+void e1inp_hsl_init(void)
+{
+ e1h = talloc_zero(tall_bsc_ctx, struct hsl_e1_handle);
+ if (!e1h)
+ return;
+
+ e1inp_driver_register(&hsl_driver);
+}
diff --git a/src/input/ipaccess.c b/src/input/ipaccess.c
new file mode 100644
index 0000000..5777d56
--- /dev/null
+++ b/src/input/ipaccess.c
@@ -0,0 +1,499 @@
+/* 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 "internal.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/socket.h>
+#include <sys/ioctl.h>
+#include <arpa/inet.h>
+
+#include <osmocom/core/select.h>
+#include <osmocom/gsm/tlv.h>
+#include <osmocom/core/msgb.h>
+#include <osmocom/core/logging.h>
+#include <talloc.h>
+#include <osmocom/gsm/abis/e1_input.h>
+#include <osmocom/gsm/abis/ipaccess.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
+
+static void *tall_bsc_ctx;
+
+/* data structure for one E1 interface with A-bis */
+struct ia_e1_handle {
+ struct osmo_fd listen_fd;
+ struct osmo_fd rsl_listen_fd;
+ struct gsm_network *gsmnet;
+};
+
+static struct ia_e1_handle *e1h;
+
+
+#define TS1_ALLOC_SIZE 900
+
+/*
+ * Common propietary IPA messages:
+ * - PONG: in reply to PING.
+ * - ID_REQUEST: first messages once OML has been established.
+ * - ID_ACK: in reply to ID_ACK.
+ */
+const uint8_t ipa_pong_msg[] = {
+ 0, 1, IPAC_PROTO_IPACCESS, IPAC_MSGT_PONG
+};
+
+const uint8_t ipa_id_ack_msg[] = {
+ 0, 1, IPAC_PROTO_IPACCESS, IPAC_MSGT_ID_ACK
+};
+
+const uint8_t ipa_id_req_msg[] = {
+ 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 int ipaccess_send(int fd, const void *msg, size_t msglen)
+{
+ int ret;
+
+ ret = write(fd, msg, msglen);
+ if (ret < 0)
+ return ret;
+ if (ret < msglen) {
+ LOGP(DINP, LOGL_ERROR, "ipaccess_send: short write\n");
+ return -EIO;
+ }
+ return ret;
+}
+
+int ipaccess_send_pong(int fd)
+{
+ return ipaccess_send(fd, ipa_pong_msg, sizeof(ipa_pong_msg));
+}
+
+int ipaccess_send_id_ack(int fd)
+{
+ return ipaccess_send(fd, ipa_id_ack_msg, sizeof(ipa_id_ack_msg));
+}
+
+int ipaccess_send_id_req(int fd)
+{
+ return ipaccess_send(fd, ipa_id_req_msg, sizeof(ipa_id_req_msg));
+}
+
+/*
+ * read one ipa message from the socket
+ * return NULL in case of error
+ */
+struct msgb *ipaccess_read_msg(struct osmo_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;
+}
+
+static int handle_ts1_read(struct osmo_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;
+ int ret = 0, error;
+
+ msg = ipaccess_read_msg(bfd, &error);
+ if (!msg) {
+ if (e1i_ts->line->rx_err)
+ e1i_ts->line->rx_err(error);
+ if (error == 0) {
+ osmo_fd_unregister(bfd);
+ close(bfd->fd);
+ bfd->fd = -1;
+ }
+ return error;
+ }
+ DEBUGP(DMI, "RX %u: %s\n", ts_nr, osmo_hexdump(msgb_l2(msg), msgb_l2len(msg)));
+
+ /* XXX better use e1inp_ts_rx. */
+
+ if (e1i_ts->line->rx)
+ e1i_ts->line->rx(msg, e1i_ts);
+ return ret;
+}
+
+void ipaccess_prepend_header_ext(struct msgb *msg, int proto)
+{
+ struct ipaccess_head_ext *hh_ext;
+
+ /* prepend the osmo ip.access header extension */
+ hh_ext = (struct ipaccess_head_ext *) msgb_push(msg, sizeof(*hh_ext));
+ hh_ext->proto = proto;
+}
+
+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 osmo_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;
+ uint8_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, osmo_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. */
+ osmo_timer_schedule(&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 osmo_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;
+}
+
+static int
+ipaccess_line_update(struct e1inp_line *line, enum e1inp_line_role role);
+
+struct e1inp_driver ipaccess_driver = {
+ .name = "ipa",
+ .want_write = ts_want_write,
+ .line_update = ipaccess_line_update,
+ .default_delay = 0,
+};
+
+/* callback of the OML listening filedescriptor */
+static int listen_fd_cb(struct osmo_fd *listen_bfd, unsigned int what)
+{
+ int ret;
+ int idx = 0;
+ int i;
+ struct e1inp_line *line = listen_bfd->data;
+ struct e1inp_ts *e1i_ts;
+ struct osmo_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));
+
+ /* create virrtual E1 timeslots for signalling */
+ e1inp_ts_config_sign(&line->ts[1-1], line);
+
+ /* 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 = osmo_fd_register(bfd);
+ if (ret < 0) {
+ LOGP(DINP, LOGL_ERROR, "could not register FD\n");
+ close(bfd->fd);
+ return ret;
+ }
+
+ /* Request ID. FIXME: request LOCATION, HW/SW VErsion, Unit Name, Serno */
+ ret = ipaccess_send_id_req(bfd->fd);
+
+ return ret;
+}
+
+static int rsl_listen_fd_cb(struct osmo_fd *listen_bfd, unsigned int what)
+{
+ struct sockaddr_in sa;
+ socklen_t sa_len = sizeof(sa);
+ struct osmo_fd *bfd;
+ int ret;
+
+ if (!(what & BSC_FD_READ))
+ return 0;
+
+ bfd = talloc_zero(tall_bsc_ctx, struct osmo_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 = osmo_fd_register(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 = ipaccess_send_id_req(bfd->fd);
+
+ return 0;
+}
+
+static int
+ipaccess_line_update(struct e1inp_line *line, enum e1inp_line_role role)
+{
+ int ret = -ENOENT;
+
+ switch(role) {
+ case E1INP_LINE_R_BSC:
+ /* Listen for OML connections */
+ ret = make_sock(&e1h->listen_fd, IPPROTO_TCP, INADDR_ANY,
+ IPA_TCP_PORT_OML, 0, listen_fd_cb, line);
+ if (ret < 0)
+ return ret;
+
+ /* Listen for RSL connections */
+ ret = make_sock(&e1h->rsl_listen_fd, IPPROTO_TCP, INADDR_ANY,
+ IPA_TCP_PORT_RSL, 0, rsl_listen_fd_cb, NULL);
+ if (ret < 0)
+ return ret;
+ break;
+ case E1INP_LINE_R_BTS:
+ /* XXX: no implemented yet. */
+ break;
+ default:
+ break;
+ }
+ return ret;
+}
+
+/* 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 osmo_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 = osmo_fd_register(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)
+{
+ e1h->gsmnet = gsmnet;
+ return 0;
+}
+
+void e1inp_ipaccess_init(void)
+{
+ e1h = talloc_zero(tall_bsc_ctx, struct ia_e1_handle);
+ if (!e1h)
+ return;
+
+ e1inp_driver_register(&ipaccess_driver);
+}
diff --git a/src/input/lapd.c b/src/input/lapd.c
new file mode 100644
index 0000000..060edb6
--- /dev/null
+++ b/src/input/lapd.c
@@ -0,0 +1,713 @@
+/* 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 "internal.h"
+
+#include <stdio.h>
+#include <string.h>
+#include <assert.h>
+#include <errno.h>
+
+#include "lapd.h"
+
+#include <osmocom/core/linuxlist.h>
+#include <osmocom/core/logging.h>
+#include <talloc.h>
+#include <osmocom/core/msgb.h>
+#include <osmocom/core/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 osmo_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)
+ osmo_timer_del(&sap->sabme_timer);
+ break;
+ default:
+ if (newstate == SAP_STATE_SABM_RETRANS)
+ osmo_timer_schedule(&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);
+ teip = 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)
+ osmo_timer_schedule(&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/input/misdn.c b/src/input/misdn.c
new file mode 100644
index 0000000..45d5e06
--- /dev/null
+++ b/src/input/misdn.c
@@ -0,0 +1,547 @@
+/* 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 "internal.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/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 <osmocom/core/select.h>
+#include <osmocom/core/msgb.h>
+#include <osmocom/core/logging.h>
+#include <osmocom/gsm/abis/e1_input.h>
+#include <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 osmo_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", osmo_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 osmo_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;
+ uint8_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, osmo_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;
+ osmo_timer_schedule(&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 osmo_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;
+ uint8_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",
+ osmo_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 osmo_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",
+ osmo_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 osmo_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 osmo_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, enum e1inp_line_role role);
+
+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 osmo_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 = osmo_fd_register(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, enum e1inp_line_role role)
+{
+ 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/socket.c b/src/socket.c
new file mode 100644
index 0000000..f0f8fe3
--- /dev/null
+++ b/src/socket.c
@@ -0,0 +1,109 @@
+/* OpenBSC sokcet code, taken from 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 "internal.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/socket.h>
+#include <sys/ioctl.h>
+#include <arpa/inet.h>
+
+#include <osmocom/core/select.h>
+#include <osmocom/core/msgb.h>
+#include <osmocom/core/logging.h>
+#include <talloc.h>
+
+int make_sock(struct osmo_fd *bfd, int proto,
+ uint32_t ip, uint16_t port, int priv_nr,
+ int (*cb)(struct osmo_fd *fd, unsigned int what), void *data)
+{
+ struct sockaddr_in addr;
+ int ret, on = 1;
+ int type = SOCK_STREAM;
+
+ switch (proto) {
+ case IPPROTO_TCP:
+ type = SOCK_STREAM;
+ break;
+ case IPPROTO_UDP:
+ type = SOCK_DGRAM;
+ break;
+ case IPPROTO_GRE:
+ type = SOCK_RAW;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ bfd->fd = socket(AF_INET, type, proto);
+ bfd->cb = cb;
+ bfd->when = BSC_FD_READ;
+ bfd->data = data;
+ bfd->priv_nr = priv_nr;
+
+ if (bfd->fd < 0) {
+ LOGP(DINP, LOGL_ERROR, "could not create socket.\n");
+ return -EIO;
+ }
+
+ memset(&addr, 0, sizeof(addr));
+ addr.sin_family = AF_INET;
+ addr.sin_port = htons(port);
+ if (ip != INADDR_ANY)
+ addr.sin_addr.s_addr = htonl(ip);
+ else
+ 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));
+ close(bfd->fd);
+ return -EIO;
+ }
+
+ if (proto == IPPROTO_TCP) {
+ ret = listen(bfd->fd, 1);
+ if (ret < 0) {
+ perror("listen");
+ close(bfd->fd);
+ return ret;
+ }
+ }
+
+ ret = osmo_fd_register(bfd);
+ if (ret < 0) {
+ perror("register_listen_fd");
+ close(bfd->fd);
+ return ret;
+ }
+ return 0;
+}
diff --git a/src/subchan_demux.c b/src/subchan_demux.c
new file mode 100644
index 0000000..6ff66bc
--- /dev/null
+++ b/src/subchan_demux.c
@@ -0,0 +1,323 @@
+/* A E1 sub-channel (de)multiplexer with TRAU frame sync */
+
+/* (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 "internal.h"
+
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+
+#include <osmocom/gsm/abis/subchan_demux.h>
+#include <osmocom/gsm/abis/trau_frame.h>
+//#include <openbsc/debug.h>
+#include <talloc.h>
+//#include <openbsc/gsm_data.h>
+
+void *tall_tqe_ctx;
+
+static inline void append_bit(struct demux_subch *sch, uint8_t bit)
+{
+ sch->out_bitbuf[sch->out_idx++] = bit;
+}
+
+#define SYNC_HDR_BITS 16
+static const uint8_t nullbytes[SYNC_HDR_BITS];
+
+/* check if we have just completed the 16 bit zero sync header,
+ * in accordance with GSM TS 08.60 Chapter 4.8.1 */
+static int sync_hdr_complete(struct demux_subch *sch, uint8_t bit)
+{
+ if (bit == 0)
+ sch->consecutive_zeros++;
+ else
+ sch->consecutive_zeros = 0;
+
+ if (sch->consecutive_zeros >= SYNC_HDR_BITS) {
+ sch->consecutive_zeros = 0;
+ return 1;
+ }
+
+ return 0;
+}
+
+/* resynchronize to current location */
+static void resync_to_here(struct demux_subch *sch)
+{
+ memset(sch->out_bitbuf, 0, SYNC_HDR_BITS);
+
+ /* set index in a way that we can continue receiving bits after
+ * the end of the SYNC header */
+ sch->out_idx = SYNC_HDR_BITS;
+ sch->in_sync = 1;
+}
+
+int subch_demux_init(struct subch_demux *dmx)
+{
+ int i;
+
+ dmx->chan_activ = 0;
+ for (i = 0; i < NR_SUBCH; i++) {
+ struct demux_subch *sch = &dmx->subch[i];
+ sch->out_idx = 0;
+ memset(sch->out_bitbuf, 0xff, sizeof(sch->out_bitbuf));
+ }
+ return 0;
+}
+
+/* input some arbitrary (modulo 4) number of bytes of a 64k E1 channel,
+ * split it into the 16k subchannels */
+int subch_demux_in(struct subch_demux *dmx, uint8_t *data, int len)
+{
+ int i, c;
+
+ /* we avoid partially filled bytes in outbuf */
+ if (len % 4)
+ return -EINVAL;
+
+ for (i = 0; i < len; i++) {
+ uint8_t inbyte = data[i];
+
+ for (c = 0; c < NR_SUBCH; c++) {
+ struct demux_subch *sch = &dmx->subch[c];
+ uint8_t inbits;
+ uint8_t bit;
+
+ /* ignore inactive subchannels */
+ if (!(dmx->chan_activ & (1 << c)))
+ continue;
+
+ inbits = inbyte >> (c << 1);
+
+ /* two bits for each subchannel */
+ if (inbits & 0x01)
+ bit = 1;
+ else
+ bit = 0;
+ append_bit(sch, bit);
+
+ if (sync_hdr_complete(sch, bit))
+ resync_to_here(sch);
+
+ if (inbits & 0x02)
+ bit = 1;
+ else
+ bit = 0;
+ append_bit(sch, bit);
+
+ if (sync_hdr_complete(sch, bit))
+ resync_to_here(sch);
+
+ /* FIXME: verify the first bit in octet 2, 4, 6, ...
+ * according to TS 08.60 4.8.1 */
+
+ /* once we have reached TRAU_FRAME_BITS, call
+ * the TRAU frame handler callback function */
+ if (sch->out_idx >= TRAU_FRAME_BITS) {
+ if (sch->in_sync) {
+ dmx->out_cb(dmx, c, sch->out_bitbuf,
+ sch->out_idx, dmx->data);
+ sch->in_sync = 0;
+ }
+ sch->out_idx = 0;
+ }
+ }
+ }
+ return i;
+}
+
+int subch_demux_activate(struct subch_demux *dmx, int subch)
+{
+ if (subch >= NR_SUBCH)
+ return -EINVAL;
+
+ dmx->chan_activ |= (1 << subch);
+ return 0;
+}
+
+int subch_demux_deactivate(struct subch_demux *dmx, int subch)
+{
+ if (subch >= NR_SUBCH)
+ return -EINVAL;
+
+ dmx->chan_activ &= ~(1 << subch);
+ return 0;
+}
+
+/* MULTIPLEXER */
+
+static int alloc_add_idle_frame(struct subch_mux *mx, int sch_nr)
+{
+ /* allocate and initialize with idle pattern */
+ return subchan_mux_enqueue(mx, sch_nr, trau_idle_frame(),
+ TRAU_FRAME_BITS);
+}
+
+/* return the requested number of bits from the specified subchannel */
+static int get_subch_bits(struct subch_mux *mx, int subch,
+ uint8_t *bits, int num_requested)
+{
+ struct mux_subch *sch = &mx->subch[subch];
+ int num_bits = 0;
+
+ while (num_bits < num_requested) {
+ struct subch_txq_entry *txe;
+ int num_bits_left;
+ int num_bits_thistime;
+
+ /* make sure we have a valid entry at top of tx queue.
+ * if not, add an idle frame */
+ if (llist_empty(&sch->tx_queue))
+ alloc_add_idle_frame(mx, subch);
+
+ if (llist_empty(&sch->tx_queue))
+ return -EIO;
+
+ txe = llist_entry(sch->tx_queue.next, struct subch_txq_entry, list);
+ num_bits_left = txe->bit_len - txe->next_bit;
+
+ if (num_bits_left < num_requested)
+ num_bits_thistime = num_bits_left;
+ else
+ num_bits_thistime = num_requested;
+
+ /* pull the bits from the txe */
+ memcpy(bits + num_bits, txe->bits + txe->next_bit, num_bits_thistime);
+ txe->next_bit += num_bits_thistime;
+
+ /* free the tx_queue entry if it is fully consumed */
+ if (txe->next_bit >= txe->bit_len) {
+ llist_del(&txe->list);
+ talloc_free(txe);
+ }
+
+ /* increment global number of bits dequeued */
+ num_bits += num_bits_thistime;
+ }
+
+ return num_requested;
+}
+
+/* compact an array of 8 single-bit bytes into one byte of 8 bits */
+static uint8_t compact_bits(const uint8_t *bits)
+{
+ uint8_t ret = 0;
+ int i;
+
+ for (i = 0; i < 8; i++)
+ ret |= (bits[i] ? 1 : 0) << i;
+
+ return ret;
+}
+
+/* obtain a single output byte from the subchannel muxer */
+static int mux_output_byte(struct subch_mux *mx, uint8_t *byte)
+{
+ uint8_t bits[8];
+ int rc;
+
+ /* combine two bits of every subchan */
+ rc = get_subch_bits(mx, 0, &bits[0], 2);
+ rc = get_subch_bits(mx, 1, &bits[2], 2);
+ rc = get_subch_bits(mx, 2, &bits[4], 2);
+ rc = get_subch_bits(mx, 3, &bits[6], 2);
+
+ *byte = compact_bits(bits);
+
+ return rc;
+}
+
+/* Request the output of some muxed bytes from the subchan muxer */
+int subchan_mux_out(struct subch_mux *mx, uint8_t *data, int len)
+{
+ int i;
+
+ for (i = 0; i < len; i++) {
+ int rc;
+ rc = mux_output_byte(mx, &data[i]);
+ if (rc < 0)
+ break;
+ }
+ return i;
+}
+
+static int llist_len(struct llist_head *head)
+{
+ struct llist_head *entry;
+ int i = 0;
+
+ llist_for_each(entry, head)
+ i++;
+
+ return i;
+}
+
+/* evict the 'num_evict' number of oldest entries in the queue */
+static void tx_queue_evict(struct mux_subch *sch, int num_evict)
+{
+ struct subch_txq_entry *tqe;
+ int i;
+
+ for (i = 0; i < num_evict; i++) {
+ if (llist_empty(&sch->tx_queue))
+ return;
+
+ tqe = llist_entry(sch->tx_queue.next, struct subch_txq_entry, list);
+ llist_del(&tqe->list);
+ talloc_free(tqe);
+ }
+}
+
+/* enqueue some data into the tx_queue of a given subchannel */
+int subchan_mux_enqueue(struct subch_mux *mx, int s_nr, const uint8_t *data,
+ int len)
+{
+ struct mux_subch *sch = &mx->subch[s_nr];
+ int list_len = llist_len(&sch->tx_queue);
+ struct subch_txq_entry *tqe = talloc_zero_size(tall_tqe_ctx,
+ sizeof(*tqe) + len);
+ if (!tqe)
+ return -ENOMEM;
+
+ tqe->bit_len = len;
+ memcpy(tqe->bits, data, len);
+
+ if (list_len > 2)
+ tx_queue_evict(sch, list_len-2);
+
+ llist_add_tail(&tqe->list, &sch->tx_queue);
+
+ return 0;
+}
+
+/* initialize one subchannel muxer instance */
+int subchan_mux_init(struct subch_mux *mx)
+{
+ int i;
+
+ memset(mx, 0, sizeof(*mx));
+ for (i = 0; i < NR_SUBCH; i++) {
+ struct mux_subch *sch = &mx->subch[i];
+ INIT_LLIST_HEAD(&sch->tx_queue);
+ }
+
+ return 0;
+}
diff --git a/src/trau_frame.c b/src/trau_frame.c
new file mode 100644
index 0000000..7be6e8f
--- /dev/null
+++ b/src/trau_frame.c
@@ -0,0 +1,260 @@
+/* TRAU frame handling according to GSM TS 08.60 */
+
+/* (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 "internal.h"
+
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+
+#include <osmocom/gsm/abis/trau_frame.h>
+#include <osmocom/gsm/abis/subchan_demux.h>
+//#include <openbsc/debug.h>
+
+static uint32_t get_bits(const uint8_t *bitbuf, int offset, int num)
+{
+ int i;
+ uint32_t ret = 0;
+
+ for (i = offset; i < offset + num; i++) {
+ ret = ret << 1;
+ if (bitbuf[i])
+ ret |= 1;
+ }
+ return ret;
+}
+
+/* Decode according to 3.1.1 */
+static void decode_fr(struct decoded_trau_frame *fr, const uint8_t *trau_bits)
+{
+ int i;
+ int d_idx = 0;
+
+ /* C1 .. C15 */
+ memcpy(fr->c_bits+0, trau_bits+17, 15);
+ /* C16 .. C21 */
+ memcpy(fr->c_bits+15, trau_bits+310, 6);
+ /* T1 .. T4 */
+ memcpy(fr->t_bits+0, trau_bits+316, 4);
+ /* D1 .. D255 */
+ for (i = 32; i < 304; i+= 16) {
+ memcpy(fr->d_bits + d_idx, trau_bits+i+1, 15);
+ d_idx += 15;
+ }
+ /* D256 .. D260 */
+ memcpy(fr->d_bits + d_idx, trau_bits + 305, 5);
+}
+
+/* Decode according to 3.1.2 */
+static void decode_amr(struct decoded_trau_frame *fr, const uint8_t *trau_bits)
+{
+ int i;
+ int d_idx = 0;
+
+ /* C1 .. C15 */
+ memcpy(fr->c_bits+0, trau_bits+17, 15);
+ /* C16 .. C25 */
+ memcpy(fr->c_bits+15, trau_bits+33, 10);
+ /* T1 .. T4 */
+ memcpy(fr->t_bits+0, trau_bits+316, 4);
+ /* D1 .. D5 */
+ memcpy(fr->d_bits, trau_bits+43, 5);
+ /* D6 .. D245 */
+ for (i = 48; i < 304; i += 16) {
+ memcpy(fr->d_bits + d_idx, trau_bits+i+1, 15);
+ d_idx += 15;
+ }
+ /* D246 .. D256 */
+ memcpy(fr->d_bits + d_idx, trau_bits + 305, 11);
+}
+
+int decode_trau_frame(struct decoded_trau_frame *fr, const uint8_t *trau_bits)
+{
+ uint8_t cbits5 = get_bits(trau_bits, 17, 5);
+
+ switch (cbits5) {
+ case TRAU_FT_FR_UP:
+ case TRAU_FT_FR_DOWN:
+ case TRAU_FT_IDLE_UP:
+ case TRAU_FT_IDLE_DOWN:
+ case TRAU_FT_EFR:
+ decode_fr(fr, trau_bits);
+ break;
+ case TRAU_FT_AMR:
+ decode_amr(fr, trau_bits);
+ break;
+ case TRAU_FT_OM_UP:
+ case TRAU_FT_OM_DOWN:
+ case TRAU_FT_DATA_UP:
+ case TRAU_FT_DATA_DOWN:
+ case TRAU_FT_D145_SYNC:
+ case TRAU_FT_EDATA:
+ LOGP(DMUX, LOGL_NOTICE, "can't decode unimplemented TRAU "
+ "Frame Type 0x%02x\n", cbits5);
+ return -1;
+ break;
+ default:
+ LOGP(DMUX, LOGL_NOTICE, "can't decode unknown TRAU "
+ "Frame Type 0x%02x\n", cbits5);
+ return -1;
+ break;
+ }
+
+ return 0;
+}
+
+const uint8_t ft_fr_down_bits[] = { 1, 1, 1, 0, 0 };
+const uint8_t ft_idle_down_bits[] = { 0, 1, 1, 1, 0 };
+
+/* modify an uplink TRAU frame so we can send it downlink */
+int trau_frame_up2down(struct decoded_trau_frame *fr)
+{
+ uint8_t cbits5 = get_bits(fr->c_bits, 0, 5);
+
+ switch (cbits5) {
+ case TRAU_FT_FR_UP:
+ memcpy(fr->c_bits, ft_fr_down_bits, 5);
+ /* clear time alignment */
+ memset(fr->c_bits+5, 0, 6);
+ /* FIXME: SP / BFI in case of DTx */
+ /* C12 .. C21 are spare and coded as '1' */
+ memset(fr->c_bits+11, 0x01, 10);
+ break;
+ case TRAU_FT_EFR:
+ /* clear time alignment */
+ memset(fr->c_bits+5, 0, 6);
+ /* FIXME: set UFE appropriately */
+ /* FIXME: SP / BFI in case of DTx */
+ break;
+ case TRAU_FT_IDLE_UP:
+ memcpy(fr->c_bits, ft_idle_down_bits, 5);
+ /* clear time alignment */
+ memset(fr->c_bits+5, 0, 6);
+ /* FIXME: SP / BFI in case of DTx */
+ /* C12 .. C21 are spare and coded as '1' */
+ memset(fr->c_bits+11, 0x01, 10);
+ break;
+ case TRAU_FT_FR_DOWN:
+ case TRAU_FT_IDLE_DOWN:
+ case TRAU_FT_OM_DOWN:
+ case TRAU_FT_DATA_DOWN:
+ /* we cannot convert a downlink to a downlink frame */
+ return -EINVAL;
+ break;
+ case TRAU_FT_AMR:
+ case TRAU_FT_OM_UP:
+ case TRAU_FT_DATA_UP:
+ case TRAU_FT_D145_SYNC:
+ case TRAU_FT_EDATA:
+ LOGP(DMUX, LOGL_NOTICE, "unimplemented TRAU Frame Type "
+ "0x%02x\n", cbits5);
+ return -1;
+ break;
+ default:
+ LOGP(DMUX, LOGL_NOTICE, "unknown TRAU Frame Type "
+ "0x%02x\n", cbits5);
+ return -1;
+ break;
+ }
+
+ return 0;
+
+}
+
+static void encode_fr(uint8_t *trau_bits, const struct decoded_trau_frame *fr)
+{
+ int i;
+ int d_idx = 0;
+
+ trau_bits[16] = 1;
+ /* C1 .. C15 */
+ memcpy(trau_bits+17, fr->c_bits+0, 15);
+ /* D1 .. D255 */
+ for (i = 32; i < 304; i+= 16) {
+ trau_bits[i] = 1;
+ memcpy(trau_bits+i+1, fr->d_bits + d_idx, 15);
+ d_idx += 15;
+ }
+ /* D256 .. D260 */
+ trau_bits[304] = 1;
+ memcpy(trau_bits + 305, fr->d_bits + d_idx, 5);
+ /* C16 .. C21 */
+ memcpy(trau_bits+310, fr->c_bits+15, 6);
+
+ /* FIXME: handle timing adjustment */
+
+ /* T1 .. T4 */
+ memcpy(trau_bits+316, fr->t_bits+0, 4);
+}
+
+int encode_trau_frame(uint8_t *trau_bits, const struct decoded_trau_frame *fr)
+{
+ uint8_t cbits5 = get_bits(fr->c_bits, 0, 5);
+
+ /* 16 bits of sync header */
+ memset(trau_bits, 0, 16);
+
+ switch (cbits5) {
+ case TRAU_FT_FR_UP:
+ case TRAU_FT_FR_DOWN:
+ case TRAU_FT_IDLE_UP:
+ case TRAU_FT_IDLE_DOWN:
+ case TRAU_FT_EFR:
+ encode_fr(trau_bits, fr);
+ break;
+ case TRAU_FT_AMR:
+ case TRAU_FT_OM_UP:
+ case TRAU_FT_OM_DOWN:
+ case TRAU_FT_DATA_UP:
+ case TRAU_FT_DATA_DOWN:
+ case TRAU_FT_D145_SYNC:
+ case TRAU_FT_EDATA:
+ LOGP(DMUX, LOGL_NOTICE, "unimplemented TRAU Frame Type "
+ "0x%02x\n", cbits5);
+ return -1;
+ break;
+ default:
+ LOGP(DMUX, LOGL_NOTICE, "unknown TRAU Frame Type "
+ "0x%02x\n", cbits5);
+ return -1;
+ break;
+ }
+
+ return 0;
+}
+
+static struct decoded_trau_frame fr_idle_frame = {
+ .c_bits = { 0, 1, 1, 1, 0 }, /* IDLE DOWNLINK 3.5.5 */
+ .t_bits = { 1, 1, 1, 1 },
+};
+static uint8_t encoded_idle_frame[TRAU_FRAME_BITS];
+static int dbits_initted;
+
+uint8_t *trau_idle_frame(void)
+{
+ /* only initialize during the first call */
+ if (!dbits_initted) {
+ /* set all D-bits to 1 */
+ memset(&fr_idle_frame.d_bits, 0x01, 260);
+ encode_fr(encoded_idle_frame, &fr_idle_frame);
+ }
+ return encoded_idle_frame;
+}
diff --git a/tests/Makefile.am b/tests/Makefile.am
new file mode 100644
index 0000000..c9986fd
--- /dev/null
+++ b/tests/Makefile.am
@@ -0,0 +1,10 @@
+INCLUDES = $(all_includes) -I$(top_srcdir)/include
+AM_CFLAGS=-Wall -g $(LIBOSMOCORE_CFLAGS) $(LIBOSMOGSM_CFLAGS) $(COVERAGE_CFLAGS)
+AM_LDFLAGS = $(COVERAGE_LDFLAGS)
+
+noinst_PROGRAMS = e1inp_ipa_bsc_test
+
+e1inp_ipa_bsc_test_SOURCES = e1inp_ipa_bsc_test.c
+
+e1inp_ipa_bsc_test_LDADD = $(top_builddir)/src/libosmoabis.la \
+ $(LIBOSMOCORE_LIBS) $(LIBOSMOGSM_LIBS)
diff --git a/tests/e1inp_ipa_bsc_test.c b/tests/e1inp_ipa_bsc_test.c
new file mode 100644
index 0000000..8985e98
--- /dev/null
+++ b/tests/e1inp_ipa_bsc_test.c
@@ -0,0 +1,69 @@
+#include <stdio.h>
+#include <osmocom/gsm/abis/e1_input.h>
+
+static int rx_cb(struct msgb *msg, struct e1inp_ts *ts)
+{
+ printf("received data\n");
+
+ /* For ISDN: from the timeslot type, we can get if it's:
+ * - E1INP_TS_TYPE_SIGN: in this case, check if we have a signal
+ * link in this timeslot, then, check if it's OML or RSL and pass
+ * it to the upper layer.
+ * - E1INP_TS_TYPE_TRAU.
+ *
+ * For INET: we have to check if this is a control message, if it's
+ * a response to previous request id, we enable the signal links for
+ * OML and RSL. Otherwise, look up for the existing signal link and
+ * pass it to the upper layer. We don't receive TRAU frames, we use
+ * RTP.
+ */
+ return 0;
+}
+
+static int rx_err_cb(int error)
+{
+ printf("error, malformed message\n");
+ return 0;
+}
+
+int main(void)
+{
+ struct e1inp_line *line;
+ struct e1inp_ts *sign_ts;
+
+ e1inp_init();
+
+#define LINENR 0
+
+ line = e1inp_line_create(LINENR, "ipa", rx_cb, rx_err_cb);
+ if (line == NULL) {
+ fprintf(stderr, "problem creating E1 line\n");
+ exit(EXIT_FAILURE);
+ }
+ sign_ts = &line->ts[0];
+ if (e1inp_ts_config_sign(sign_ts, line) < 0) {
+ fprintf(stderr, "problem setting timeslot in E1 line\n");
+ exit(EXIT_FAILURE);
+ }
+
+ /*
+ * Depending if this is a real or virtual E1 lines:
+ * - real (ISDN): create signal link for OML and RSL before line up.
+ * - vitual (INET): we create it once we have seen response to REQ_ID.
+ *
+ * The signal link is created via e1inp_sign_link_create(...)
+ *
+ * See e1_reconfig_trx and e1_reconfig_bts in libbsc/e1_config.c,
+ * it explains how this is done with ISDN.
+ */
+
+ if (e1inp_line_update(line, E1INP_LINE_R_BSC) < 0) {
+ fprintf(stderr, "problem enabling E1 line\n");
+ exit(EXIT_FAILURE);
+ }
+
+ while (1) {
+ osmo_select_main(0);
+ }
+ return 0;
+}
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