mgcp: use osmo-mgw to switch RTP streams

osmo-bsc currently negotiates the RTP stream directly with the
BTS and reports back the RTP IP/Port on the BTS. This works fine
for a single BTS, but for Handover the port/ip pointing to the
MSC side must not change, so an entity in between the BTSs and
the MSC is required.

Integrate the mgcp-client and use osmo-mgw to switch the RTP
streams.

Depends: osmo-mgw Ib5fcc72775bf72b489ff79ade36fb345d8d20736
Depends: osmo-mgw I44b338b09de45e1675cedf9737fa72dde72e979a
Depends: osmo-mgw I29c5e2fb972896faeb771ba040f015592487fcbe

Change-Id: Ia2882b7ca31a3219c676986e85045fa08a425d7a

1 files changed, 13 insertions, 0 deletions

diff --git a/src/osmo-bsc/osmo_bsc_main.c b/src/osmo-bsc/osmo_bsc_main.c
index 730e1db48..5d25701bb 100644
--- a/src/osmo-bsc/osmo_bsc_main.c
+++ b/src/osmo-bsc/osmo_bsc_main.c
@@ -44,6 +44,7 @@
 #include <osmocom/abis/abis.h>
 
 #include <osmocom/sccp/sccp.h>
+#include <osmocom/mgcp_client/mgcp_client.h>
 
 #define _GNU_SOURCE
 #include <getopt.h>
@@ -206,6 +207,9 @@ int main(int argc, char **argv)
 		exit(1);
 	}
 
+	bsc_gsmnet->mgw.conf = talloc_zero(bsc_gsmnet, struct mgcp_client_conf);
+	mgcp_client_conf_init(bsc_gsmnet->mgw.conf);
+
 	bts_init();
 	libosmo_abis_init(tall_bsc_ctx);
 
@@ -274,6 +278,15 @@ int main(int argc, char **argv)
 		}
 	}
 
+	bsc_gsmnet->mgw.client = mgcp_client_init(bsc_gsmnet, bsc_gsmnet->mgw.conf);
+
+	if (mgcp_client_connect(bsc_gsmnet->mgw.client)) {
+		LOGP(DNM, LOGL_ERROR, "MGW connect failed at (%s:%u)\n",
+		     bsc_gsmnet->mgw.conf->remote_addr,
+		     bsc_gsmnet->mgw.conf->remote_port);
+		exit(1);
+	}
+
 	if (osmo_bsc_sigtran_init(&bsc_gsmnet->bsc_data->mscs) != 0) {
 		LOGP(DNM, LOGL_ERROR, "Failed to initalize sigtran backhaul.\n");
 		exit(1);