libmsc/gsm_04_11.c: forward MO SMS messages over GSUP

Change-Id: I7d651fde3d608d02f275a74043dc42262aabb1b8
Depends-on: (core) Ic37f3b2114b8095cfce22977e67133b9103942e3
Depends-on: (core) Ibe325c64ae2d6c626b232533bb4cbc65fc2b5d71
Depends-on: (OsmoHLR) I0589ff27933e9bca2bcf93b8259004935778db8f
Related Change-Id: (TTCN) I7abc95b8e416f7308d54e11be11c08586d18e6c5
Related Change-Id: (TTCN) Id14bbd8bd51558cdacefea0fe042769cd69ed5c8
Related: OS#3587
diff --git a/src/libmsc/gsm_04_08.c b/src/libmsc/gsm_04_08.c
index dc0476b..b042baf 100644
--- a/src/libmsc/gsm_04_08.c
+++ b/src/libmsc/gsm_04_08.c
@@ -1791,6 +1791,14 @@
 		DEBUGP(DMSC, "Routed to GSM 09.11 SS/USSD handler\n");
 		return gsm0911_gsup_handler(vsub, gsup_msg);
 
+	/* GSM 04.11 code implementing MO SMS */
+	case OSMO_GSUP_MSGT_MO_FORWARD_SM_ERROR:
+	case OSMO_GSUP_MSGT_MO_FORWARD_SM_RESULT:
+	case OSMO_GSUP_MSGT_READY_FOR_SM_ERROR:
+	case OSMO_GSUP_MSGT_READY_FOR_SM_RESULT:
+		DEBUGP(DMSC, "Routed to GSM 04.11 MO handler\n");
+		return gsm411_gsup_mo_handler(vsub, gsup_msg);
+
 	default:
 		LOGP(DMM, LOGL_ERROR, "No handler found for %s, dropping message...\n",
 			osmo_gsup_message_type_name(gsup_msg->message_type));