[SR-Users] catching lost websocket ua

Juha Heinanen jh at tutpro.com
Sun Feb 21 04:20:34 CET 2016


when a ua that has registered over tcp has lost its connection to sip
proxy, t_relay() succeeds and branch failure route is executed:

Feb 21 05:07:26 lohi /usr/bin/sip-proxy[20528]: INFO: ********** entering branch_route [CONTACT_BRANCH]
Feb 21 05:07:26 lohi /usr/bin/sip-proxy[20528]: INFO: ********** activating t_on_branch_failure("contact)"
Feb 21 05:07:26 lohi /usr/bin/sip-proxy[20528]: INFO: Routing INVITE <sip:jh-0x16737a0 at 192.98.102.10:44186;transport=tcp> to contact via <sip:192.98.102.10:51297;transport=tcp>
Feb 21 05:07:26 lohi /usr/bin/sip-proxy[20528]: WARNING: tm [t_fwd.c:1543]: t_send_branch(): ERROR: t_send_branch: sending request on branch 0 failed
Feb 21 05:07:26 lohi /usr/bin/sip-proxy[20528]: INFO: ********* t_relay success
Feb 21 05:07:31 lohi /usr/bin/sip-proxy[20480]: INFO: ********** entering tm:branch-failure:contact

but when a ua that has registered over websocket over tcp has lost is
connection to sip proxy, t_relay() fails and branch failure route is not
executed:

Feb 21 05:08:26 lohi /usr/bin/sip-proxy[20523]: INFO: ********** entering branch_route [CONTACT_BRANCH]
Feb 21 05:08:26 lohi /usr/bin/sip-proxy[20523]: INFO: ********** activating t_on_branch_failure("contact)"
Feb 21 05:08:26 lohi /usr/bin/sip-proxy[20523]: INFO: Routing INVITE <sip:an41pa6p at ggjdptrk9jm0.invalid;transport=ws> to contact via <sip:192.98.102.10:39057;transport=ws>
Feb 21 05:08:26 lohi /usr/bin/sip-proxy[20523]: WARNING: <core> [msg_translator.c:2756]: via_builder(): TCP/TLS connection (id: 0) for WebSocket could not be found
Feb 21 05:08:26 lohi /usr/bin/sip-proxy[20523]: ERROR: <core> [msg_translator.c:1974]: build_req_buf_from_sip_req(): could not create Via header
Feb 21 05:08:26 lohi /usr/bin/sip-proxy[20523]: ERROR: tm [t_fwd.c:462]: prepare_new_uac(): could not build request
Feb 21 05:08:26 lohi /usr/bin/sip-proxy[20523]: ERROR: tm [t_fwd.c:1712]: t_forward_nonack(): ERROR: t_forward_nonack: failure to add branches
Feb 21 05:08:26 lohi /usr/bin/sip-proxy[20523]: INFO: ********* t_relay failure

in the latter case, is there some means to get access to the failing
branch in order to be able to unregister it, delete its rtpengine
session, etc?

why can't kamailio behave the same way no matter if pure tcp connection
or one using websocket protocol over tcp connection fails?

-- juha



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