bsc: Add module for handling BSSAP input

The current implementation is a stub. The code from
bssap.c of on-waves/bsc-master will be migrated into
this new structure

4 files changed, 71 insertions, 25 deletions

diff --git a/openbsc/include/openbsc/osmo_bsc.h b/openbsc/include/openbsc/osmo_bsc.h
index 5657c01ce..b94fc0409 100644
--- a/openbsc/include/openbsc/osmo_bsc.h
+++ b/openbsc/include/openbsc/osmo_bsc.h
@@ -30,5 +30,8 @@ int bsc_delete_connection(struct osmo_bsc_sccp_con *sccp);
 int bsc_scan_bts_msg(struct gsm_subscriber_connection *conn, struct msgb *msg);
 int bsc_scan_msc_msg(struct gsm_subscriber_connection *conn, struct msgb *msg);
 
+int bsc_handle_udt(struct gsm_network *net, struct bsc_msc_connection *conn, struct msgb *msg, unsigned int length);
+int bsc_handle_dt1(struct osmo_bsc_sccp_con *conn, struct msgb *msg, unsigned int len);
+
 
 #endif
diff --git a/openbsc/src/bsc/Makefile.am b/openbsc/src/bsc/Makefile.am
index 168c7215f..fe2dff0a1 100644
--- a/openbsc/src/bsc/Makefile.am
+++ b/openbsc/src/bsc/Makefile.am
@@ -7,7 +7,7 @@ bin_PROGRAMS = osmo-bsc
 
 osmo_bsc_SOURCES = osmo_bsc_main.c osmo_bsc_rf.c osmo_bsc_vty.c osmo_bsc_api.c \
 		   osmo_bsc_grace.c osmo_bsc_msc.c osmo_bsc_sccp.c \
-		   osmo_bsc_filter.c \
+		   osmo_bsc_filter.c osmo_bsc_bssap.c \
 		   $(top_srcdir)/src/debug.c $(top_srcdir)/src/bsc_msc.c \
 		   $(top_srcdir)/src/bsc_init.c
 osmo_bsc_LDADD = $(top_builddir)/src/libvty.a \
diff --git a/openbsc/src/bsc/osmo_bsc_bssap.c b/openbsc/src/bsc/osmo_bsc_bssap.c
new file mode 100644
index 000000000..44c652bbd
--- /dev/null
+++ b/openbsc/src/bsc/osmo_bsc_bssap.c
@@ -0,0 +1,60 @@
+/* GSM 08.08 BSSMAP handling						*/
+/* (C) 2009-2010 by Holger Hans Peter Freyther <zecke@selfish.org>
+ * (C) 2009-2010 by On-Waves
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU 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 <openbsc/osmo_bsc.h>
+#include <openbsc/debug.h>
+
+#include <osmocore/protocol/gsm_08_08.h>
+
+int bsc_handle_udt(struct gsm_network *network,
+		   struct bsc_msc_connection *conn,
+		   struct msgb *msgb, unsigned int length)
+{
+	struct bssmap_header *bs;
+
+	LOGP(DMSC, LOGL_DEBUG, "Incoming SCCP message ftom MSC: %s\n",
+		hexdump(msgb->l3h, length));
+
+	if (length < sizeof(*bs)) {
+		LOGP(DMSC, LOGL_ERROR, "The header is too short.\n");
+		return -1;
+	}
+
+	bs = (struct bssmap_header *) msgb->l3h;
+	if (bs->length < length - sizeof(*bs))
+		return -1;
+
+	switch (bs->type) {
+	case BSSAP_MSG_BSS_MANAGEMENT:
+		LOGP(DMSC, LOGL_ERROR, "BSS management not implemented.\n");
+		break;
+	default:
+		LOGP(DMSC, LOGL_ERROR, "Unimplemented msg type: %d\n", bs->type);
+	}
+
+	return 0;
+}
+
+int bsc_handle_dt1(struct osmo_bsc_sccp_con *conn,
+		   struct msgb *msg, unsigned int len)
+{
+	return -1;
+}
diff --git a/openbsc/src/bsc/osmo_bsc_sccp.c b/openbsc/src/bsc/osmo_bsc_sccp.c
index a30708b98..ad2ee5177 100644
--- a/openbsc/src/bsc/osmo_bsc_sccp.c
+++ b/openbsc/src/bsc/osmo_bsc_sccp.c
@@ -42,6 +42,10 @@ static LLIST_HEAD(active_connections);
 static void msc_outgoing_sccp_data(struct sccp_connection *conn,
 				   struct msgb *msg, unsigned int len)
 {
+	struct osmo_bsc_sccp_con *bsc_con =
+			(struct osmo_bsc_sccp_con *) conn->data_ctx;
+
+	bsc_handle_dt1(bsc_con, msg, len);
 }
 
 static void msc_outgoing_sccp_state(struct sccp_connection *conn, int old_state)
@@ -118,29 +122,8 @@ static int msc_sccp_accept(struct sccp_connection *connection, void *data)
 
 static int msc_sccp_read(struct msgb *msgb, unsigned int length, void *data)
 {
-	struct bssmap_header *bs;
-
-	LOGP(DMSC, LOGL_DEBUG, "Incoming SCCP message ftom MSC: %s\n",
-		hexdump(msgb->l3h, length));
-
-	if (length < sizeof(*bs)) {
-		LOGP(DMSC, LOGL_ERROR, "The header is too short.\n");
-		return -1;
-	}
-
-	bs = (struct bssmap_header *) msgb->l3h;
-	if (bs->length < length - sizeof(*bs))
-		return -1;
-
-	switch (bs->type) {
-	case BSSAP_MSG_BSS_MANAGEMENT:
-		LOGP(DMSC, LOGL_ERROR, "BSS management not implemented.\n");
-		break;
-	default:
-		LOGP(DMSC, LOGL_ERROR, "Unimplemented msg type: %d\n", bs->type);
-	}
-
-	return 0;
+	struct gsm_network *net = (struct gsm_network *) data;
+	return bsc_handle_udt(net, net->msc_data->msc_con, msgb, length);
 }
 
 int bsc_queue_for_msc(struct gsm_subscriber_connection *conn, struct msgb *msg)
@@ -258,7 +241,7 @@ int osmo_bsc_sccp_init(struct gsm_network *gsmnet)
 	sccp_set_log_area(DSCCP);
 	sccp_system_init(msc_sccp_write_ipa, gsmnet);
 	sccp_connection_set_incoming(&sccp_ssn_bssap, msc_sccp_accept, NULL);
-	sccp_set_read(&sccp_ssn_bssap, msc_sccp_read, NULL);
+	sccp_set_read(&sccp_ssn_bssap, msc_sccp_read, gsmnet);
 
 	register_signal_handler(SS_MSC, handle_msc_signal, gsmnet);