From: Russell Bryant <russell@russellbryant.com>
Date: Thu, 30 Dec 2004 19:34:47 +0000 (+0000)
Subject: ignore invalid rtp packets (bug #3030)
X-Git-Tag: 1.0.11.1~316
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=379d3a133c96e4757a156194361fa80a33350200;p=thirdparty%2Fasterisk.git

ignore invalid rtp packets (bug #3030)


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/v1-0@4606 65c4cc65-6c06-0410-ace0-fbb531ad65f3
---

diff --git a/rtp.c b/rtp.c
index 3d60c3abb4..69685da686 100755
--- a/rtp.c
+++ b/rtp.c
@@ -406,6 +406,7 @@ struct ast_frame *ast_rtp_read(struct ast_rtp *rtp)
 	struct sockaddr_in sin;
 	int len;
 	unsigned int seqno;
+	int version;
 	int payloadtype;
 	int hdrlen = 12;
 	int mark;
@@ -454,6 +455,12 @@ struct ast_frame *ast_rtp_read(struct ast_rtp *rtp)
 
 	/* Get fields */
 	seqno = ntohl(rtpheader[0]);
+
+	/* Check RTP version */
+	version = (seqno & 0xC0000000) >> 30;
+	if (version != 2)
+		return &null_frame;
+	
 	payloadtype = (seqno & 0x7f0000) >> 16;
 	mark = seqno & (1 << 23);
 	ext = seqno & (1 << 28);