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Ensure that a destination callno of 0 will not match for frames that do not

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start a dialog (new, lagrq, and ping).
(closes issue #12963)
 Reported by: russellb
 Patches: 
       chan_iax2_dup_new_fix4.patch uploaded by jpgrayson (license 492)


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@130169 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Tilghman Lesher
2008-07-11 18:51:56 +00:00
parent f29986aac8
commit 4e59c52935
1 changed files with 15 additions and 6 deletions
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21
channels/chan_iax2.c
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@@ -7191,12 +7191,21 @@ static int socket_process(struct iax2_thread *thread)
* Discussed in the following thread:
* http://lists.digium.com/pipermail/asterisk-dev/2008-May/033217.html
*/
if (f.frametype != AST_FRAME_IAX ||
(f.subclass != IAX_COMMAND_NEW &&
f.subclass != IAX_COMMAND_PING &&
f.subclass != IAX_COMMAND_LAGRQ)) {
/* Get the destination call number */
dcallno = ntohs(fh->dcallno) & ~IAX_FLAG_RETRANS;
/* Get the destination call number */
dcallno = ntohs(fh->dcallno) & ~IAX_FLAG_RETRANS;
if (f.frametype == AST_FRAME_IAX &&
(f.subclass == IAX_COMMAND_NEW ||
f.subclass == IAX_COMMAND_PING ||
f.subclass == IAX_COMMAND_LAGRQ)) {
dcallno = 0;
} else if (!dcallno) {
/* All other full-frames must have a non-zero dcallno,
* We silently drop this frame since it cannot be a
* valid match to an existing call session.
*/
return 1;
}
if ((f.frametype == AST_FRAME_IAX) && ((f.subclass == IAX_COMMAND_NEW) || (f.subclass == IAX_COMMAND_REGREQ) ||
(f.subclass == IAX_COMMAND_POKE) || (f.subclass == IAX_COMMAND_FWDOWNL) ||