chan_sip: Trigger reinvite if the SDP answer is included in the SIP ACK

Under certain conditions, a SIP transaction involving directmedia wouldn't
trigger a re-invite because the SDP answer was included in an ACK instead
of in a message that we would have triggered the invite with. This patch
just queues a source change control frame if the dialog is using
directmedia when we find sdp for an ACK.

(closes issue AST-913)
Reported by: Thomas Arimont
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Merged revisions 371337 from http://svn.asterisk.org/svn/asterisk/branches/1.8
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Merged revisions 371338 from http://svn.asterisk.org/svn/asterisk/branches/10
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Merged revisions 371355 from http://svn.asterisk.org/svn/asterisk/branches/11

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@371356 65c4cc65-6c06-0410-ace0-fbb531ad65f3

diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index b0fd1ed..5606183 100644 (file)
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -27376,8 +27376,12 @@ static int handle_incoming(struct sip_pvt *p, struct sip_request *req, struct as
                        p->pendinginvite = 0;
                        acked = __sip_ack(p, seqno, 1 /* response */, 0);
                        if (find_sdp(req)) {
-                               if (process_sdp(p, req, SDP_T38_NONE))
+                               if (process_sdp(p, req, SDP_T38_NONE)) {
                                        return -1;
+                               }
+                               if (ast_test_flag(&p->flags[0], SIP_DIRECT_MEDIA)) {
+                                       ast_queue_control(p->owner, AST_CONTROL_SRCCHANGE);
+                               }
                        }
                        check_pendings(p);
                } else if (p->glareinvite == seqno) {