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chan_sip: Do not send all codecs on INVITE. Do not break on Session-Timers.

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Asterisk 13.7.0 included a fix for ASTERISK-24543, not to send all those
codecs, which the caller did not request/support. That fix was not complete
because on the second Session Timer all codecs were sent again. Some VoIP/SIP
clients interpreted that complete codec-list as a change in the SIP session.
Because of that, Asterisk did not send the RTP audio via NAT anymore which
created a non-audio scenario after the second Session Timer fired.

ASTERISK-24543 #close

Change-Id: I1881827816ab7fd47eb4287a95961179b34a0b66
This commit is contained in:
Alexander Traud
2016-03-24 20:08:10 +01:00
parent d3af5320d4
commit 81ce60f6d4
1 changed files with 1 additions and 1 deletions
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2
channels/chan_sip.c
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@@ -13530,7 +13530,7 @@ static enum sip_result add_sdp(struct sip_request *resp, struct sip_pvt *p, int
}
/* Finally our remaining audio/video codecs */
for (x = 0; ast_test_flag(&p->flags[0], SIP_OUTGOING) && x < ast_format_cap_count(p->caps); x++) {
for (x = 0; p->outgoing_call && x < ast_format_cap_count(p->caps); x++) {
tmp_fmt = ast_format_cap_get_format(p->caps, x);
if (ast_format_cap_iscompatible_format(alreadysent, tmp_fmt) != AST_FORMAT_CMP_NOT_EQUAL) {