Implement AoIP, port to M3UA SIGTRAN (large addition and refactoring)

This was originally a long series of commits converging to the final result
seen in this patch. It does not make much sense to review the smaller steps'
trial and error, we need to review this entire change as a whole.

Implement AoIP in osmo-msc and osmo-bsc.

Change over to the new libosmo-sigtran API with support for proper
SCCP/M3UA/SCTP stacking, as mandated by 3GPP specifications for the IuCS and
IuPS interfaces.

From here on, a separate osmo-stp process is required for SCCP routing between
OsmoBSC / OsmoHNBGW <-> OsmoMSC / OsmoSGSN

jenkins.sh: build from libosmo-sccp and osmo-iuh master branches now for new
M3UA SIGTRAN.

Patch-by: pmaier, nhofmeyr, laforge
Change-Id: I5ae4e05ee7c57cad341ea5e86af37c1f6b0ffa77

1 files changed, 2 insertions, 18 deletions

diff --git a/include/openbsc/msc_ifaces.h b/include/openbsc/msc_ifaces.h
index 2965c72c5..a1071ae9b 100644
--- a/include/openbsc/msc_ifaces.h
+++ b/include/openbsc/msc_ifaces.h
@@ -28,20 +28,6 @@
 /* Each main linkage must implement this function (see comment above). */
 extern int iu_tx(struct msgb *msg, uint8_t sapi);
 
-/* So far this is a dummy implemented in libmsc/a_iface.c. When A-interface
- * gets implemented, it should be in a separate lib (like libiu), this function
- * should move there, and the following comment should remain here: "
- * Each main linkage must implement this function (see comment above).
- * " */
-extern int a_tx(struct msgb *msg);
-
-/* So far this is a dummy implemented in libmsc/a_iface.c. When A-interface
- * gets implemented, it should be in a separate lib (like libiu), this function
- * should move there, and the following comment should remain here: "
- * Each main linkage must implement this function (see comment above).
- * " */
-extern int a_page(const char *imsi, uint32_t tmsi, uint16_t lac);
-
 int msc_tx_dtap(struct gsm_subscriber_connection *conn,
 		struct msgb *msg);
 
@@ -49,10 +35,8 @@ int msc_gsm48_tx_mm_serv_ack(struct gsm_subscriber_connection *conn);
 int msc_gsm48_tx_mm_serv_rej(struct gsm_subscriber_connection *conn,
 			     enum gsm48_reject_value value);
 
-/* TODO: specific to A interface, move this away */
-int msc_gsm0808_tx_cipher_mode(struct gsm_subscriber_connection *conn, int cipher,
-			       const uint8_t *key, int len, int include_imeisv);
-
 int msc_tx_common_id(struct gsm_subscriber_connection *conn);
 int msc_call_assignment(struct gsm_trans *trans);
 int msc_call_bridge(struct gsm_trans *trans1, struct gsm_trans *trans2);
+void msc_call_release(struct gsm_trans *trans);
+int msc_call_connect(struct gsm_trans *trans, uint16_t port, uint32_t ip);