send DEACTIVATE SACCH when sending RR CHANEL RELEASE
As per specification, we first send the RR CHANNEL RELEASE to the MS,
and then tell the BTS to disable the SACCH on that channel.
diff --git a/openbsc/include/openbsc/abis_rsl.h b/openbsc/include/openbsc/abis_rsl.h
index 84a1697..cc4a367 100644
--- a/openbsc/include/openbsc/abis_rsl.h
+++ b/openbsc/include/openbsc/abis_rsl.h
@@ -477,6 +477,7 @@
/* to be provided by external code */
int abis_rsl_sendmsg(struct msgb *msg);
+int rsl_deact_sacch(struct gsm_lchan *lchan);
int rsl_chan_release(struct gsm_lchan *lchan);
/* BCCH related code */
diff --git a/openbsc/src/abis_rsl.c b/openbsc/src/abis_rsl.c
index df95e79..cc4a229 100644
--- a/openbsc/src/abis_rsl.c
+++ b/openbsc/src/abis_rsl.c
@@ -652,6 +652,25 @@
return abis_rsl_sendmsg(msg);
}
+/* Chapter 8.4.5 */
+int rsl_deact_sacch(struct gsm_lchan *lchan)
+{
+ struct abis_rsl_dchan_hdr *dh;
+ struct msgb *msg = rsl_msgb_alloc();
+
+ dh = (struct abis_rsl_dchan_hdr *) msgb_put(msg, sizeof(*dh));
+ init_dchan_hdr(dh, RSL_MT_DEACTIVATE_SACCH);
+ dh->chan_nr = lchan2chan_nr(lchan);
+
+ msg->lchan = lchan;
+ msg->trx = lchan->ts->trx;
+
+ DEBUGP(DRSL, "DEACTivate SACCH CMD channel=%s chan_nr=0x%02x\n",
+ gsm_ts_name(lchan->ts), dh->chan_nr);
+
+ return abis_rsl_sendmsg(msg);
+}
+
/* Chapter 9.1.7 of 04.08 */
int rsl_chan_release(struct gsm_lchan *lchan)
{
diff --git a/openbsc/src/gsm_04_08.c b/openbsc/src/gsm_04_08.c
index 9fb53a7..df4d3c6 100644
--- a/openbsc/src/gsm_04_08.c
+++ b/openbsc/src/gsm_04_08.c
@@ -1769,7 +1769,11 @@
DEBUGP(DRR, "Sending Channel Release: Chan: Number: %d Type: %d\n",
lchan->nr, lchan->type);
- return gsm48_sendmsg(msg);
+ /* Send actual release request to MS */
+ gsm48_sendmsg(msg);
+
+ /* Deactivate the SACCH on the BTS side */
+ return rsl_deact_sacch(lchan);
}
/* Call Control */