Re: [sr-dev] Forcing TCP connection reuse doesn't use the failure_route when the connection has gone.

I have an edge-proxy which accepts TCP connections from clients. When I know that the clients are behind NATs (for example), I use the set_forward_no_connect() function to force connection reuse and avoid timeouts. In the case where the connection has already gone, the system sends a “477 Unfortunately error on sending to next hop occurred (477/TM)” response back to the registrar. These connections are using outbound, so I would like to convert this into a “430 Flow Failed” response to the registrar, but the 477 response doesn’t seem to trigger the onreply_route or failure_route. Is there a way of trapping and handling this failure? If not, do we need more flexibility in handling this particular tcp_send error (or other similar ones)? Other systems may wish to try additional destinations from the failure route. Snippets of my cfg and logs are below. The con_reuse flag is checked in tcp_send at tcp_main.c:1846 Regards, Hugh route[RELAY] { xlog("L_INFO", "$rm: route[RELAY]\n"); loose_route(); $var(lr_ret) = $rc; if ($var(lr_ret) == 2) { xlog("L_INFO", "$rm: loose route with outbound\n"); t_on_failure("FAIL_OUTBOUND"); set_forward_no_connect(); if (t_relay() < 0) { xlog("L_WARN", "$rm: loose route with outbound failed\n"); sl_send_reply("500", "Something bad happened"); } exit; } . . . } May 1 17:01:08 kamailio-cep[28226]: INFO: <script>: INVITE: Routing logic starts here May 1 17:01:08 kamailio-cep[28226]: INFO: <script>: INVITE: route[REQINIT] May 1 17:01:08 kamailio-cep[28226]: INFO: <script>: INVITE: route[INITIAL_REQUEST] May 1 17:01:08 kamailio-cep[28226]: INFO: <script>: INVITE: route[RECORD_ROUTE] May 1 17:01:08 kamailio-cep[28226]: INFO: <script>: INVITE: route[RELAY] May 1 17:01:08 kamailio-cep[28226]: INFO: <script>: INVITE: loose route with outbound May 1 17:01:08 kamailio-cep[28226]: ERROR: tm [../../forward.h:219]: msg_send(): msg_send: ERROR: tcp_send failed May 1 17:01:08 kamailio-cep[28226]: ERROR: tm [t_fwd.c:1609]: t_send_branch(): ERROR: t_send_branch: sending request on branch 0 failed May 1 17:01:08 kamailio-cep[28226]: INFO: <script>: ACK: Routing logic starts here May 1 17:01:08 kamailio-cep[28226]: INFO: <script>: ACK: route[REQINIT] ------------------------------------------------------------------------ This e-mail and any attachment is for authorised use by the intended recipient(s) only. It may contain proprietary material, confidential information and/or be subject to legal privilege. It should not be copied, disclosed to, retained or used by, any other party. If you are not an intended recipient then please promptly delete this e-mail and any attachment and all copies and inform the sender. Thank you for understanding. _______________________________________________ sr-dev mailing list sr-dev(a)lists.sip-router.org http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-dev