[asterisk-commits] kmoore: branch 12 r409900 - /branches/12/bridges/bridge_native_rtp.c

[SVN commits to the Asterisk project]

Author: kmoore
Date: Wed Mar  5 13:21:39 2014
New Revision: 409900

URL: http://svnview.digium.com/svn/asterisk?view=rev&rev=409900
Log:
bridge_native_rtp: Fix crash involving masquerade

It is possible for a channel to be masqueraded out of a bridge which
means it may no longer have RTP glue to check upon leaving said bridge.
If this situation occurred (it's possible at least during dial and call
pickup) then Asterisk would crash. This change makes sure the glue is
checked before use.

(closes issue AST-1290)
Reported by: John Bigelow

Modified:
    branches/12/bridges/bridge_native_rtp.c

Modified: branches/12/bridges/bridge_native_rtp.c
URL: http://svnview.digium.com/svn/asterisk/branches/12/bridges/bridge_native_rtp.c?view=diff&rev=409900&r1=409899&r2=409900
==============================================================================
--- branches/12/bridges/bridge_native_rtp.c (original)
+++ branches/12/bridges/bridge_native_rtp.c Wed Mar  5 13:21:39 2014
@@ -452,9 +452,19 @@
 	native_rtp_bridge_framehook_detach(bridge_channel);
 
 	glue = ast_rtp_instance_get_glue(ast_channel_tech(bridge_channel->chan)->type);
+	if (!glue) {
+		return;
+	}
+
 	glue->get_rtp_info(bridge_channel->chan, &instance);
-	glue->get_vrtp_info ? glue->get_vrtp_info(bridge_channel->chan, &vinstance) : AST_RTP_GLUE_RESULT_FORBID;
-	glue->get_trtp_info ? glue->get_trtp_info(bridge_channel->chan, &tinstance) : AST_RTP_GLUE_RESULT_FORBID;
+
+	if (glue->get_vrtp_info) {
+		glue->get_vrtp_info(bridge_channel->chan, &vinstance);
+	}
+
+	if (glue->get_trtp_info) {
+		glue->get_trtp_info(bridge_channel->chan, &tinstance);
+	}
 
 	/* Tear down P2P bridges */
 	if (instance) {