[SR-Users] event_route[tm:branch-failure] question

i did some more tests and got very puzzling result. this time i tested with 488 response, but response code does not matter. sip proxy forwards invite based on location lookup to contact of registered local user: Apr 14 09:13:33 siika /usr/sbin/sip-proxy[8001]: INFO: INVITE <sip:test@test.tutpro.com> is to local user &lt;test(a)test.tutpro.com&gt; Apr 14 09:13:33 siika /usr/sbin/sip-proxy[8001]: INFO: Routing INVITE <sip:test@192.98.102.30:5054> to contact in branch route these two statements are executed: t_on_branch_failure("contact"); xlog("L_INFO", "Routing $rm <$ru> to contact\n"); uas replies with 488 which causes this branch-failure route to be executed: event_route [tm:branch-failure:contact] { if (t_check_status("488")) { xlog("L_INFO", "Got 488 response to <$ru>\n"); append_branch(); xlog("L_INFO", "Relaying to <$ru>\n"); route(RELAY_TO_CONTACTS); exit; }; }; and i get to syslog: Apr 14 09:13:33 siika /usr/sbin/sip-proxy[7952]: INFO: Got 488 response to <sip:test@test.tutpro.com> Apr 14 09:13:33 siika /usr/sbin/sip-proxy[7952]: INFO: Relaying to <sip:test@test.tutpro.com> note that in above $ru is aor, not contact uri, of the callee, which is the same problem that i described in previous message. for that reason, route(RELAY_TO_CONTACTS) causes the request to be routed back to the proxy itself: Apr 14 09:13:33 siika /usr/sbin/sip-proxy[7952]: INFO: Routing INVITE to contact <sip:test@test.tutpro.com> to proxy itself proxy reports that it receives the request and is processes it exactly the same way as previously, except that this time magic happens and $ru in branch_failure route is not aor like it was before but it is the contact uri like it should have been already during the first iteration: Apr 14 09:13:33 siika /usr/sbin/sip-proxy[7953]: INFO: INVITE <sip:test@test.tutpro.com> by <sip:jh@test.tutpro.com> is from Proxy Itself Apr 14 09:13:33 siika /usr/sbin/sip-proxy[7953]: INFO: INVITE <sip:test@test.tutpro.com> is to local user &lt;test(a)test.tutpro.com&gt; Apr 14 09:13:33 siika /usr/sbin/sip-proxy[7953]: INFO: Routing INVITE <sip:test@192.98.102.30:5054> to contact Apr 14 09:13:33 siika /usr/sbin/sip-proxy[7951]: INFO: Got 488 response to <sip:test@192.98.102.30:5054> Apr 14 09:13:33 siika /usr/sbin/sip-proxy[7951]: INFO: Relaying to <sip:test@192.98.102.30:5054> can someone explain how/why behavior changes and why during the first execution of branch_failure route, $ru is not what it should be? -- juha