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res_rtp_multicast: Ensure SSRC is set properly

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This fixes a bug where the SSRC field on multicast RTP can be stuck at
0 which can cause problems for endpoints trying to make sense of
incoming streams.

(closes issue ASTERISK-22567)
Reported by: Simone Camporeale
Patches:
    22567_res_mulitcast_ssrc.patch uploaded by Simone Camporeale (License 6536)
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Merged revisions 400393 from http://svn.asterisk.org/svn/asterisk/branches/1.8
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Merged revisions 400394 from http://svn.asterisk.org/svn/asterisk/branches/11
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Merged revisions 400395 from http://svn.asterisk.org/svn/asterisk/branches/12


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@400397 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Kinsey Moore
2013-10-03 18:32:59 +00:00
parent 3578bc30fd
commit c3b1d8f8c1
1 changed files with 4 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
res/res_rtp_multicast.c
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@@ -260,15 +260,15 @@ static int multicast_rtp_write(struct ast_rtp_instance *instance, struct ast_fra
/* Construct an RTP header for our packet */
rtpheader = (unsigned char *)(f->data.ptr - hdrlen);
put_unaligned_uint32(rtpheader, htonl((2 << 30) | (codec << 16) | (multicast->seqno)));
put_unaligned_uint32(rtpheader + 4, htonl(multicast->lastts));
if (ast_test_flag(f, AST_FRFLAG_HAS_TIMING_INFO)) {
put_unaligned_uint32(rtpheader + 4, htonl(f->ts * 8));
}
else {
put_unaligned_uint32(rtpheader + 8, htonl(multicast->ssrc));
} else {
put_unaligned_uint32(rtpheader + 4, htonl(multicast->lastts));
}
put_unaligned_uint32(rtpheader + 8, htonl(multicast->ssrc));
/* Increment sequence number and wrap to 0 if it overflows 16 bits. */
multicast->seqno = 0xFFFF & (multicast->seqno + 1);