From 9dff8995b43f7288b14bc176c8432ddf5efe205c Mon Sep 17 00:00:00 2001
From: Russell Bryant <russell@russellbryant.com>
Date: Wed, 11 Feb 2009 23:56:37 +0000
Subject: [PATCH] Fixify infinite DTMF in the case that no RFC2833 END event is
 ever received

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@174985 65c4cc65-6c06-0410-ace0-fbb531ad65f3
---
 main/rtp.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/main/rtp.c b/main/rtp.c
index 5165ade83c..c917e70b47 100644
--- a/main/rtp.c
+++ b/main/rtp.c
@@ -1299,6 +1299,18 @@ struct ast_frame *ast_rtp_read(struct ast_rtp *rtp)
 	/* Record received timestamp as last received now */
 	rtp->lastrxts = timestamp;
 
+	if (rtp->dtmfcount) {
+		rtp->dtmfcount -= (timestamp - rtp->lastrxts);
+
+		if (rtp->dtmfcount < 0) {
+			rtp->dtmfcount = 0;
+		}
+
+		if (rtp->resp && !rtp->dtmfcount) {
+			return send_dtmf(rtp, AST_FRAME_DTMF_END);
+		}
+	}
+
 	rtp->f.mallocd = 0;
 	rtp->f.datalen = res - hdrlen;
 	rtp->f.data = rtp->rawdata + hdrlen + AST_FRIENDLY_OFFSET;