[Users] t_on_failure doesn't

Klaus Darilion klaus.mailinglists at pernau.at
Thu Jul 20 23:57:06 CEST 2006


Hi Nathan!

Honestly I've never used LCR for failover yet, but I think the
appebd_branch in failure route is not necessary - I think this done by
next_gw.

regards
klaus

On Thu, July 20, 2006 22:04, Nathan Hawkins said:
> I'm trying to use the LCR module to do a failover between two gateways.
> For testing purposes, I have a gateway record pointed at an IP that
> isn't used. The problem is, I can't seem to get OpenSER to fail over to
> the other gateway. I want to use TCP (with TLS when I'm done), but I get
> this:
>
> Jul 20 15:36:57 asiago /usr/sbin/openser[11896]: route[6]: routing to
> INVITE sip:MYDID at MYIPADDRESS:5060;transport=tcp
> Jul 20 15:37:17 asiago /usr/sbin/openser[11896]: ERROR:
> tcp_blocking_connect: timeout (10)
> Jul 20 15:37:17 asiago /usr/sbin/openser[11896]: ERROR: tcpconn_connect:
> tcp_blocking_connect failed
> Jul 20 15:37:17 asiago /usr/sbin/openser[11896]: ERROR: tcp_send:
>  connect failed
> Jul 20 15:37:17 asiago /usr/sbin/openser[11896]: msg_send: ERROR:
>  tcp_send failed
> Jul 20 15:37:17 asiago /usr/sbin/openser[11896]:
> ERROR:tm:t_forward_nonack: sending request failed
>
> (IP and username censored.)
>
> OpenSER sends this to the caller:
> SIP/2.0 477 Unfortunately error on sending to next hop occurred (477/TM)
>
> Why can't I catch this with either the return code from t_relay or the
> failure route?
>
> It will go to the failure route if I get a reply back from the next hop.
> But I need to fail to the other gateway.
>
> The relevent parts of the configs are shown below. (Addresses censored.)
>
> Any help would greatly appreciated.
>
> Thanks,
>
>     ---Nathan
>
>
> Config snippet:
>
>     # ok, so maybe try a gateway...
>     if( load_gws() ) {
>         xlog("L_INFO","route[3]: gateway routing $rm $ru");
>         t_on_failure("1");
>         route(6);
>         return;
>     }
> }
>
> route[6] {
>     xlog("L_INFO","route[6]: $rm $ru");
>     t_on_failure("1");
>     t_on_reply("1");
>     if (!next_gw()) {
>         xlog("L_INFO","route[6]: no more gateways for $ru");
>         exit;
>     }
>     xlog("L_INFO","route[6]: routing to $rm $ru");
>     if(!t_relay()) {
>         xlog("L_INFO","route[6]: t_relay returned $rc");
>         sl_reply_error();
>     }
>     return;
> }
>
> failure_route[1] {
>     xlog("L_INFO","failure_route[1]: $rm $ru");
>     t_on_failure("1");
>     if(t_check_status("404")) {
>         xlog("L_INFO","failure_route[1]: failing call with 404 for $ru");
>         return;
>     }
>     if (!next_gw()) {
>         xlog("L_INFO","route[6]: no more gateways for $ru");
>         exit;
>     }
>     append_branch();
>     xlog("L_INFO","failure_route[1]: sending $rm $ru");
>     if(!t_relay()) {
>         xlog("L_INFO","route[6]: t_relay returned $rc");
>     }
>     return;
> }
>
>
> Gateways:
>
> mysql> select * from gw where grp_id=4;
> +---------+--------+-----------+------+------------+-----------+--------+
> | gw_name | grp_id | ip_addr   | port | uri_scheme | transport | prefix |
> +---------+--------+-----------+------+------------+-----------+--------+
> | ithaka  |      4 | CENSORED | 5060 |       NULL |         2 | NULL   |
> | larink  |      4 | BAD_ADDRESS | 5060 |       NULL |         2 | NULL
> |
> +---------+--------+-----------+------+------------+-----------+--------+
> 2 rows in set (0.00 sec)
>
>
> ithaka is a working OpenSER proxy. larink is an empty IP address. (There
> used to be a server named larink.)
>
>
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