From 1bfcc8d8d07c89544fc22bae635282f2fe35bd8e Mon Sep 17 00:00:00 2001
From: Mark Spencer <markster@digium.com>
Date: Wed, 9 Apr 2003 21:46:58 +0000
Subject: [PATCH] Don't ACK on anything but INVITE

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@804 65c4cc65-6c06-0410-ace0-fbb531ad65f3
---
 channels/chan_sip.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index 6bd89f5d23..c3379ab9df 100755
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -3937,7 +3937,9 @@ static void handle_response(struct sip_pvt *p, int resp, char *rest, struct sip_
 						ast_queue_hangup(p->owner, 0);
 					break;
 				}
-				transmit_request(p, "ACK", seqno, 0);
+				/* ACK on invite */
+				if (!strcasecmp(msg, "INVITE"))
+					transmit_request(p, "ACK", seqno, 0);
 				p->alreadygone = 1;
 				if (!p->owner)
 					p->needdestroy = 1;
-- 
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