From 23d7376f4dc5f25d36594704b859df256fa12e1d Mon Sep 17 00:00:00 2001
From: "Kevin P. Fleming" <kpfleming@digium.com>
Date: Sat, 14 May 2005 23:41:12 +0000
Subject: [PATCH] properly strip incoming padded RTP frames (bug #4264)
git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@5652 65c4cc65-6c06-0410-ace0-fbb531ad65f3
---
rtp.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/rtp.c b/rtp.c
index 8c727197b5..9fde8b857b 100755
--- a/rtp.c
+++ b/rtp.c
@@ -429,6 +429,7 @@ struct ast_frame *ast_rtp_read(struct ast_rtp *rtp)
int version;
int payloadtype;
int hdrlen = 12;
+ int padding;
int mark;
int ext;
int x;
@@ -482,10 +483,17 @@ struct ast_frame *ast_rtp_read(struct ast_rtp *rtp)
return &null_frame;
payloadtype = (seqno & 0x7f0000) >> 16;
+ padding = seqno & (1 << 29);
mark = seqno & (1 << 23);
ext = seqno & (1 << 28);
seqno &= 0xffff;
timestamp = ntohl(rtpheader[1]);
+
+ if (padding) {
+ /* Remove padding bytes */
+ res -= rtp->rawdata[AST_FRIENDLY_OFFSET + res - 1];
+ }
+
if (ext) {
/* RTP Extension present */
hdrlen += 4;
--
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