From 9b32204204e88abf49400e15452a419a0bc96dc5 Mon Sep 17 00:00:00 2001 From: Joshua Colp Date: Mon, 25 Feb 2008 16:16:13 +0000 Subject: [PATCH] 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) git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@104084 65c4cc65-6c06-0410-ace0-fbb531ad65f3 --- channels/chan_sip.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/channels/chan_sip.c b/channels/chan_sip.c index de46b9b447..eca31b6fc4 100644 --- a/channels/chan_sip.c +++ b/channels/chan_sip.c @@ -14812,6 +14812,18 @@ static int handle_request_subscribe(struct sip_pvt *p, struct sip_request *req, } 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");