RFC6665 4.2.2: ... after a failed State NOTIFY transaction remove the subscription
The problem is that the State Notify requests rely on the 200OK reponse for pacing control
and to not confuse the notify susbsystem.
The issue is, the pendinginvite isn't cleared if a response isn't received,
thus further notify's are never sent.
The solution, follow RFC 6665 4.2.2's 'SHOULD' and remove the subscription after failure.
(closes issue ASTERISK-21677)
Reported by: Dan Martens
Tested by: alecdavis
alecdavis (license 585)
Review https://reviewboard.asterisk.org/r/2475/
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Merged revisions 387875 from http://svn.asterisk.org/svn/asterisk/branches/1.8
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Merged revisions 387880 from http://svn.asterisk.org/svn/asterisk/branches/11
git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@387885
65c4cc65-6c06-0410-ace0-
fbb531ad65f3
p->pendinginvite = p->ocseq; /* Remember that we have a pending NOTIFY in order not to confuse the NOTIFY subsystem */
- return send_request(p, &req, XMIT_RELIABLE, p->ocseq);
+ /* Send as XMIT_CRITICAL as we may never receive a 200 OK Response which clears p->pendinginvite.
+ *
+ * extensionstate_update() uses p->pendinginvite for queuing control.
+ * Updates stall if pendinginvite <> 0.
+ *
+ * The most appropriate solution is to remove the subscription when the NOTIFY transaction fails.
+ * The client will re-subscribe after restarting or maxexpiry timeout.
+ */
+
+ /* RFC6665 4.2.2. Sending State Information to Subscribers
+ * If the NOTIFY request fails due to expiration of SIP Timer F (transaction timeout),
+ * the notifier SHOULD remove the subscription.
+ */
+ return send_request(p, &req, XMIT_CRITICAL, p->ocseq);
}
/*! \brief Notify user of messages waiting in voicemail (RFC3842)