From ff612b95d4a2bfd222fe928a0fb7393d0f529b55 Mon Sep 17 00:00:00 2001
From: paulc <paulc@acf43c95-373e-0410-b603-e72c3f656dc1>
Date: Wed, 29 Apr 2009 22:07:44 +0000
Subject: [PATCH] If an early RTP start is requested but media list is unknown
 build a best guess. Patch by Peter Olsson - support for 3Com NBX PBX.

git-svn-id: http://yate.null.ro/svn/yate/trunk@2604 acf43c95-373e-0410-b603-e72c3f656dc1
---
 modules/ysipchan.cpp | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/modules/ysipchan.cpp b/modules/ysipchan.cpp
index 2d0d62a2..29a0fe44 100644
--- a/modules/ysipchan.cpp
+++ b/modules/ysipchan.cpp
@@ -3964,8 +3964,16 @@ bool YateSIPConnection::msgAnswered(Message& msg)
 	MimeSdpBody* sdp = createPasstroughSDP(msg);
 	if (!sdp) {
 	    m_rtpForward = false;
+	    bool startNow = msg.getBoolValue("rtp_start",s_start_rtp);
+	    if (startNow && !m_rtpMedia) {
+		// early RTP start but media list yet unknown - build best guess
+		ObjList* lst = new ObjList;
+		lst->append(new NetMedia("audio","RTP/AVP",msg.getValue("formats",s_audio)));
+		setMedia(lst);
+		m_rtpAddr = m_host;
+	    }
 	    // normally don't start RTP yet, only when we get the ACK
-	    sdp = createRtpSDP(msg.getBoolValue("rtp_start",s_start_rtp));
+	    sdp = createRtpSDP(startNow);
 	}
 	m->setBody(buildSIPBody(msg,sdp));