Merged revisions 56011 via svnmerge from

https://origsvn.digium.com/svn/asterisk/branches/1.4

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r56011 | russell | 2007-02-21 18:57:36 -0600 (Wed, 21 Feb 2007) | 11 lines

Merged revisions 56010 via svnmerge from 
https://origsvn.digium.com/svn/asterisk/branches/1.2

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r56010 | russell | 2007-02-21 18:53:25 -0600 (Wed, 21 Feb 2007) | 3 lines

If we receive a frame that is not in any of the negotiated formats, then drop
it.  (potentially issue #8781 and SPD-12)

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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@56012 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_sip.c

@@ -4424,6 +4424,13 @@ static struct ast_frame *sip_rtp_read(struct ast_channel *ast, struct sip_pvt *p
 		/* We already hold the channel lock */
 		if (f->frametype == AST_FRAME_VOICE) {
 			if (f->subclass != (p->owner->nativeformats & AST_FORMAT_AUDIO_MASK)) {
+				if (!(f->subclass & p->jointcapability)) {
+					if (option_debug) {
+						ast_log(LOG_DEBUG, "Bogus frame of format '%s' received from '%s'!\n",
+							ast_getformatname(f->subclass), p->owner->name);
+					}
+					return &ast_null_frame;
+				}
 				if (option_debug)
 					ast_log(LOG_DEBUG, "Oooh, format changed to %d\n", f->subclass);
 				p->owner->nativeformats = (p->owner->nativeformats & (AST_FORMAT_VIDEO_MASK | AST_FORMAT_TEXT_MASK)) | f->subclass;