[SR-Users] problem forking to dbaliase

[Yufei Tao]

Hi

I'm using Kamailio 3.1.5 and want to fork calls to all members in the
same group defined in dbaliase. e.g. alias_username is 'clients' for 3
usernames: 'clientone', 'clienttwo', 'clientthree'.

If any of the 3 users are online, call to the alias_username 'clients'
looks fine: INVITE is forked to all online users etc.

But problem comes when none of the users are online: in this case,
t_relay will cause a server error 500, as server tries to relay to the
user on trunk, e.g. clientone at domain.com, for which failed to find a
location entry and uri remaied clientone at domain.com rather than an IP
address.

I expected server to send a 404 if non of the users for alias_username
'clients' is online. How should I fix it please?

Following is relevant parts from my config file:

#############################################################
route[LOCATION]
{
  if ( alias_db_lookup("dbaliases") )
  {
    t_on_branch("BRANCH_ALIASDB"); # in branch_route[BRANCH_ALIASDB],
                                   # call another route that looks up
location,
                                   # if not existent, call drop()

  }
  else
  {
    xlog("L_DBG","LOCATION: not alias - go to lookup location trunk\n");
    route(LOCATION_TRUNK); # normal look up location and sending of 404 etc
  }

... ...
}
#############################################################
branch_route[BRANCH_ALIASDB]
{
  xlog("L_DBG", "BRANCH_ALIASDB: $fU@$fd -> $rU@$rd; Method:$rm\n");
  route(LOCATION_BRANCH);
}

route[LOCATION_BRANCH]
{
  if (!lookup("location"))
  {
    # Drop this branch - it's going nowhere
    drop();
  }
}
#############################################################
route[RELAY] {
  xlog("L_DBG","RELAY: method=$rm, callid=$ci, cseq=$cs\n");


#!ifdef WITH_NAT
  if (check_route_param("nat=yes")) {
    setbflag(FLB_NATB);
  }
  if (isflagset(FLT_NATS) || isbflagset(FLB_NATB)) {
    xlog("L_DBG", "RELAY: about to call RTPPROXY\n");
    route(RTPPROXY);
  }
#!endif

  /* example how to enable some additional event routes */
  if (is_method("INVITE")) {
    t_on_reply("REPLY_ONE");
    t_on_failure("FAIL_ONE");
  }

  if (!t_relay()) {
    sl_reply_error();
  }

  exit;
}

#############################################################
And in the main route, route LOCATION and RELAY are the last two routes:
route {
...

  # user location service
  route(LOCATION);

  route(RELAY);
}

Thanks very much!

Yufei
--
Yufei Tao
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