13 Dec
2011
13 Dec
'11
12:03 p.m.
Hi Daniel
Thanks very much for the quick response - and it works fine now :)
Cheers,
Yufei
On 13/12/11 16:05, Daniel-Constantin Mierla wrote:
Hello,
On 12/13/11 2:31 PM, Yufei Tao wrote:
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Yufei Tao
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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(a)domain.com, for which failed to find a
location entry and uri remaied clientone(a)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?
500 is caused by doing
drop to all branches, so tm creates the
transaction, but there is no outgoing branch sent to network.
A nice solution for the future will be to add kind of
t_reply_branch(...) which will set the reply code for the branch.
t_reply() is working at transaction level.
Right now an option you can do is to set r-uri in branch route to
something like 'sip:notfound@yourserverip' instead of drop and let the
branch go out.
$ru = "sip:notfound@yourserverip";
The at the beginning of request route block you can test:
if(src_ip==yourserverip && $rU="notfound") {
sl_send_reply("404", "not found");
exit;
}
Cheers,
Daniel
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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Red Embedded Design, Company Number 06688253 Registered in England:
The Waterfront, Salts Mill Rd, Saltaire, BD17 7EZ
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