From: Alexander Traud <pabstraud@compuserve.com>
Date: Wed, 4 Jan 2017 11:50:11 +0000 (+0100)
Subject: chan_sip: Remember SDP negotiation on SIP_CODEC_INBOUND.
X-Git-Tag: 14.3.0-rc1~48^2
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=refs%2Fchanges%2F94%2F4694%2F1;p=thirdparty%2Fasterisk.git

chan_sip: Remember SDP negotiation on SIP_CODEC_INBOUND.

After a SIP_CODEC_INBOUND in the dialplan, do not continue with cached formats
but remember the joint format. Cached formats contain default parameters,
often create an empty fmtp line. However, a joint format might have passed
format_get_joint(.) in a res_format_attr_* module (like Opus Codec) and
contain the resulting format parameters from a SDP negotiation.

ASTERISK-26691 #close

Change-Id: I35712d98a793d4c3efdd156cec57deab9014b1dc
---

diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index 33ec7f06d9..7e11b2420f 100644
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -7376,6 +7376,12 @@ static void try_suggested_sip_codec(struct sip_pvt *p)
 
 		ao2_ref(fmt, -1);
 	}
+
+	/* The original joint formats may have contained negotiated parameters (fmtp)
+	 * like the Opus Codec or iLBC 20. The cached formats contain the default
+	 * parameters, which could be different than the negotiated (joint) result. */
+	ast_format_cap_replace_from_cap(p->jointcaps, original_jointcaps, AST_MEDIA_TYPE_UNKNOWN);
+
 	ao2_ref(original_jointcaps, -1);
 	return;
  }