[asterisk-commits] file: branch 1.4 r104084 - /branches/1.4/channels/chan_sip.c

[SVN commits to the Asterisk project]

Author: file
Date: Mon Feb 25 10:16:13 2008
New Revision: 104084

URL: http://svn.digium.com/view/asterisk?view=rev&rev=104084
Log:
If a resubscription comes in for a dialog we no longer know about tell the remote side that the dialog does not exist so they subscribe again using a new dialog.
(closes issue #10727)
Reported by: s0l4rb03
Patches:
      10727-2.diff uploaded by file (license 11)

Modified:
    branches/1.4/channels/chan_sip.c

Modified: branches/1.4/channels/chan_sip.c
URL: http://svn.digium.com/view/asterisk/branches/1.4/channels/chan_sip.c?view=diff&rev=104084&r1=104083&r2=104084
==============================================================================
--- branches/1.4/channels/chan_sip.c (original)
+++ branches/1.4/channels/chan_sip.c Mon Feb 25 10:16:13 2008
@@ -14812,6 +14812,18 @@
 	}
 
 	if (!ast_test_flag(req, SIP_PKT_IGNORE) && !resubscribe) {	/* Set up dialog, new subscription */
+		const char *to = get_header(req, "To");
+		char totag[128];
+
+		/* Check to see if a tag was provided, if so this is actually a resubscription of a dialog we no longer know about */
+		if (!ast_strlen_zero(to) && gettag(req, "To", totag, sizeof(totag))) {
+			if (ast_test_flag(req, SIP_PKT_DEBUG))
+				ast_verbose("Received resubscription for a dialog we no longer know about. Telling remote side to subscribe again.\n");
+			transmit_response(p, "481 Subscription does not exist", req);
+			ast_set_flag(&p->flags[0], SIP_NEEDDESTROY);
+			return 0;
+		}
+
 		/* Use this as the basis */
 		if (ast_test_flag(req, SIP_PKT_DEBUG))
 			ast_verbose("Creating new subscription\n");