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Use use_lchan/put_lchan for call handling to keep the channel up 

Increase when the refcount of the lchan when we initiate a call,
get a SETUP message and put it when we want to release the call...

Once we have proper Q.931 support the use/put needs to be improved,
e.g. we currently do not allow to hangup from the network, and it
will ring until the end of time...
This commit is contained in:
Harald Welte 2009-01-09 21:27:43 +00:00
parent 626fe9c42b
commit 498b0bbd9b
1 changed files with 6 additions and 1 deletions
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7
src/gsm_04_08.c
View File

@ -2,7 +2,7 @@
* 3GPP TS 04.08 version 7.21.0 Release 1998 / ETSI TS 100 940 V7.21.0 */
/* (C) 2008 by Harald Welte <laforge@gnumonks.org>
* (C) 2008 by Holger Hans Peter Freyther <zecke@selfish.org>
* (C) 2008, 2009 by Holger Hans Peter Freyther <zecke@selfish.org>
*
* All Rights Reserved
*
@ -666,6 +666,7 @@ int gsm48_cc_tx_setup(struct gsm_lchan *lchan)
call->type = GSM_CT_MT;
msg->lchan = lchan;
use_lchan(lchan);
gh->proto_discr = GSM48_PDISC_CC;
gh->msg_type = GSM48_MT_CC_SETUP;
@ -725,11 +726,15 @@ static int gsm0408_rcv_cc(struct msgb *msg)
/* Section 5.4.3.2 */
DEBUGP(DCC, "DISCONNECT (state->RELEASE_REQ)\n");
call->state = GSM_CSTATE_RELEASE_REQ;
if (call->state != GSM_CSTATE_NULL)
put_lchan(msg->lchan);
/* FIXME: clear the network connection */
rc = gsm48_tx_simple(msg->lchan, GSM48_PDISC_CC,
GSM48_MT_CC_RELEASE);
break;
case GSM48_MT_CC_SETUP:
if (call->state == GSM_CSTATE_NULL || call->state == GSM_CSTATE_RELEASE_REQ)
use_lchan(msg->lchan);
call->type = GSM_CT_MO;
call->state = GSM_CSTATE_INITIATED;
call->transaction_id = gh->proto_discr & 0xf0;