bsc: Add thr audio module to send the MDCX message to the BTS

openbsc/include/openbsc/osmo_msc_data.h

@@ -29,10 +29,11 @@
 #include <osmocore/timer.h>
 
 struct osmo_bsc_rf;
+struct gsm_network;
 
 struct gsm_audio_support {
-        u_int8_t hr  : 1,
-                 ver : 7;
+        uint8_t hr  : 1,
+                ver : 7;
 };
 
 struct osmo_msc_data {
@@ -71,4 +72,6 @@ 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);
 
+int osmo_bsc_audio_init(struct gsm_network *network);
+
 #endif

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_bssap.c \
+		   osmo_bsc_filter.c osmo_bsc_bssap.c osmo_bsc_audio.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_audio.c

@@ -0,0 +1,70 @@
+/*
+ * ipaccess audio 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_msc_data.h>
+#include <openbsc/osmo_bsc.h>
+#include <openbsc/gsm_data.h>
+#include <openbsc/debug.h>
+#include <openbsc/signal.h>
+
+#include <arpa/inet.h>
+
+static int handle_abisip_signal(unsigned int subsys, unsigned int signal,
+				 void *handler_data, void *signal_data)
+{
+	struct gsm_subscriber_connection *con;
+	struct gsm_lchan *lchan = signal_data;
+	int rc;
+
+	if (subsys != SS_ABISIP)
+		return 0;
+
+	con = lchan->conn;
+	if (!con || !con->sccp_con)
+		return 0;
+
+	switch (signal) {
+	case S_ABISIP_CRCX_ACK:
+		/* we can ask it to connect now */
+		LOGP(DMSC, LOGL_DEBUG, "Connecting BTS to port: %d conn: %d\n",
+		     con->sccp_con->rtp_port, lchan->abis_ip.conn_id);
+
+		rc = rsl_ipacc_mdcx(lchan, ntohl(INADDR_ANY),
+				    con->sccp_con->rtp_port,
+				    lchan->abis_ip.rtp_payload2);
+		if (rc < 0) {
+			LOGP(DMSC, LOGL_ERROR, "Failed to send MDCX: %d\n", rc);
+			return rc;
+		}
+		break;
+	}
+
+	return 0;
+}
+
+int osmo_bsc_audio_init(struct gsm_network *net)
+{
+	net->hardcoded_rtp_payload = 98;
+	register_signal_handler(SS_ABISIP, handle_abisip_signal, net);
+	return 0;
+}

openbsc/src/bsc/osmo_bsc_main.c

@@ -236,6 +236,11 @@ int main(int argc, char **argv)
 		exit(1);
 	}
 
+	if (osmo_bsc_audio_init(bsc_gsmnet) != 0) {
+		LOGP(DMSC, LOGL_ERROR, "Failed to register audio support.\n");
+		exit(1);
+	}
+
 	signal(SIGINT, &signal_handler);
 	signal(SIGABRT, &signal_handler);
 	signal(SIGUSR1, &signal_handler);