bsc: Add simple SCCP binding code.

openbsc/include/openbsc/osmo_msc_data.h

@@ -64,6 +64,7 @@ struct osmo_msc_data {
 };
 
 int osmo_bsc_msc_init(struct gsm_network *network);
+int osmo_bsc_sccp_init(struct gsm_network *gsmnet);
 int msc_queue_write(struct bsc_msc_connection *conn, struct msgb *msg, int proto);
 
 #endif

openbsc/src/bsc/Makefile.am

@@ -6,7 +6,7 @@ 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_grace.c osmo_bsc_msc.c osmo_bsc_sccp.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 \

openbsc/src/bsc/osmo_bsc_main.c

@@ -231,6 +231,11 @@ int main(int argc, char **argv)
 		exit(1);
 	}
 
+	if (osmo_bsc_sccp_init(bsc_gsmnet) != 0) {
+		LOGP(DNM, LOGL_ERROR, "Failed to register SCCP.\n");
+		exit(1);
+	}
+
 	signal(SIGINT, &signal_handler);
 	signal(SIGABRT, &signal_handler);
 	signal(SIGUSR1, &signal_handler);

openbsc/src/bsc/osmo_bsc_sccp.c

@@ -0,0 +1,78 @@
+/* Interaction with the SCCP subsystem */
+/*
+ * (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/gsm_data.h>
+#include <openbsc/osmo_msc_data.h>
+#include <openbsc/debug.h>
+
+#include <osmocore/gsm0808.h>
+#include <osmocore/protocol/gsm_08_08.h>
+
+#include <osmocom/sccp/sccp.h>
+
+static void msc_sccp_write_ipa(struct sccp_connection *conn, struct msgb *msg, void *data)
+{
+	LOGP(DMSC, LOGL_ERROR, "Writing is not implemented.\n");
+	msgb_free(msg);
+}
+
+static int msc_sccp_accept(struct sccp_connection *connection, void *data)
+{
+	LOGP(DMSC, LOGL_DEBUG, "Rejecting incoming SCCP connection.\n");
+	return -1;
+}
+
+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:
+		break;
+	default:
+		LOGP(DMSC, LOGL_ERROR, "Unimplemented msg type: %d\n", bs->type);
+	}
+
+	return 0;
+}
+
+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);
+
+	return 0;
+}