paging: Send SGsAP-SERVICE-ABORT-REQUEST on paging timeout
When pagig for a CS-Call via SGs times out, the MME expects to be
informed about this via an SGsAP-SERVICE-ABORT-REQUEST, make sure this
message is sent, but only for CS-Fallback calls.
Change-Id: I3f8f153afe24cf2efa245713509bdc8488902877
Depends: osmo-ttcn3-hacks I99950a17ccf26aaa0eebded5480f33be4c57586a
Related: OS#3614
diff --git a/src/libmsc/sgs_iface.c b/src/libmsc/sgs_iface.c
index a4527f4..5ccded7 100644
--- a/src/libmsc/sgs_iface.c
+++ b/src/libmsc/sgs_iface.c
@@ -1256,6 +1256,28 @@
sgs_tx(mme->conn, msg_sgs);
}
+/*! Send SGsAP-SERVICE-ABORT-REQUEST message to MME
+ * \param[in] vsub subscriber context */
+void sgs_iface_tx_serv_abrt(struct vlr_subscr *vsub)
+{
+ struct msgb *msg_sgs;
+ struct sgs_mme_ctx *mme;
+
+ OSMO_ASSERT(vsub);
+
+ /* The service abort procedure is only defined for MT calls,
+ * see also 3GPP TS 29.118, chapter 5.13.2 */
+ if (vsub->sgs.paging_serv_ind != SGSAP_SERV_IND_CS_CALL)
+ return;
+
+ mme = sgs_mme_ctx_by_vsub(vsub, SGSAP_MSGT_DL_UD);
+ if (!mme)
+ return;
+
+ msg_sgs = gsm29118_create_service_abort_req(vsub->imsi);
+ sgs_tx(mme->conn, msg_sgs);
+}
+
/*! initalize SGs new interface
* \param[in] ctx talloc context
* \param[in] network associated gsm network