[Asterisk-cvs] asterisk/channels chan_sip.c,1.784,1.785

[kpfleming at lists.digium.com]

Update of /usr/cvsroot/asterisk/channels
In directory mongoose.digium.com:/tmp/cvs-serv14986/channels

Modified Files:
	chan_sip.c 
Log Message:
ensure SIP_HEADER does not segfault when called on hung-up channels (bug #4756, different fix than posted patch)


Index: chan_sip.c
===================================================================
RCS file: /usr/cvsroot/asterisk/channels/chan_sip.c,v
retrieving revision 1.784
retrieving revision 1.785
diff -u -d -r1.784 -r1.785
--- chan_sip.c	20 Jul 2005 17:05:18 -0000	1.784
+++ chan_sip.c	25 Jul 2005 17:13:24 -0000	1.785
@@ -8158,6 +8158,13 @@
 	}
 
 	p = chan->tech_pvt;
+
+	/* If there is no private structure, this channel is no longer alive */
+	if (!p) {
+		ast_mutex_unlock(&chan->lock);
+		return NULL;
+	}
+
 	content = get_header(&p->initreq, data);
 
 	if (ast_strlen_zero(content)) {