there is a broken grandstream sip ua that sometimes sends two initial
invites back-to-back. according to wireshark, sr received them about 10
microseconds apart. sr then forwards the request to pstn gw, but i
don't have wireshark dump of that side of the traffic. anyway, from the
ua side i see that about 10 milliseconds after receiving the invites, sr
replies to the ua "503 no more gateways available".
in my config that reply comes only from GW_FAILURE failure route,
which is set up like this:
t_on_failure("GW_FAILURE");
t_set_fr("120000", "5000");
t_relay()
so no way should failure route get executed before 5 seconds, but in
this back-to-back invite case it somehow gets executed almost
immediately. i have not seen this behavior in other situation.
this looks like a bug to me. perhaps there is some race condition
causing it? version of sr where this appears is 3.0.3.
-- juha
_______________________________________________
SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list
sr-users@lists.sip-router.org
http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
