ASCI: Add callref to assignment command
The (optional) call reference is required to assign a calling subscriber
to a voice group/bcast channel. The BSC can then determine to which
existing VGCS/VBS channel the MS is assigned to.
This IE is part of the GSM standard TS 48.008 (see ยง3.2.1.1)
Change-Id: I7955c6e0eebc930f85f360dda46be17cbd39e181
Related: OS#4854
diff --git a/include/osmocom/msc/ran_msg.h b/include/osmocom/msc/ran_msg.h
index 0dadd4f..dc1483c 100644
--- a/include/osmocom/msc/ran_msg.h
+++ b/include/osmocom/msc/ran_msg.h
@@ -109,6 +109,8 @@
bool call_id_present;
uint32_t call_id;
struct osmo_lcls *lcls;
+ bool callref_present;
+ struct gsm0808_group_callref callref;
};
struct ran_cipher_mode_command {
diff --git a/src/libmsc/ran_msg_a.c b/src/libmsc/ran_msg_a.c
index 570a8d1..2533045 100644
--- a/src/libmsc/ran_msg_a.c
+++ b/src/libmsc/ran_msg_a.c
@@ -1375,13 +1375,6 @@
return 0;
}
-static void _gsm0808_assignment_extend_osmux(struct msgb *msg, uint8_t cid)
-{
- OSMO_ASSERT(msg->l3h[1] == msgb_l3len(msg) - 2); /*TL not in len */
- msgb_tv_put(msg, GSM0808_IE_OSMO_OSMUX_CID, cid);
- msg->l3h[1] = msgb_l3len(msg) - 2;
-}
-
/* Compose a BSSAP Assignment Command.
* Passing an RTP address is optional.
* The msub is passed merely for error logging. */
@@ -1468,8 +1461,13 @@
return NULL;
}
+ /* Append optional IEs: Group Call Reference and Osmux CID */
+ OSMO_ASSERT(msg->l3h[1] == msgb_l3len(msg) - 2); /* TL not in len */
+ if (ac->callref_present)
+ gsm0808_enc_group_callref(msg, &ac->callref);
if (ac->osmux_present)
- _gsm0808_assignment_extend_osmux(msg, ac->osmux_cid);
+ msgb_tv_put(msg, GSM0808_IE_OSMO_OSMUX_CID, ac->osmux_cid);
+ msg->l3h[1] = msgb_l3len(msg) - 2;
return msg;
}