Hello,

if you want to rely on kamailio to memorize where to send the following register, the hash table is the right tool.

Cheers,
Daniel

On 16/09/14 03:37, Vik Killa wrote:

Hello,

I'm learning Kamailio. My ultimate goal is to be able to route SIP messages from User Agents to specific FS boxes.

I'm starting with routing REGISTER messages.

I used app_perl to randomly lookup one of the FS box's IP Address from postgres database, then I stored the IP in avp and then in hash. It seemed like overkill but it was the only way I could keep the FS IP address in memory between the first REGISTER and REGISTER with Auth.

my app_perl script sets the IP as follows:

my $sth = $dbh->prepare("SELECT ip_address FROM host_machine WHERE is_online = true ORDER BY random() LIMIT 1");

$sth->execute();

my $host_ip_address = $sth->fetchrow();

Kamailio::AVP::add(10, "sip:$host_ip_address:5060");

And here is my kamailio.cfg for REGISTERs

route[REGISTRAR]

{

if (!is_method("REGISTER|PUBLISH"))

return;

if (is_present_hf("Authorization")) {

add_path_received();

$avp(i:10) = $sht(a=>$ci::dest_server);

avp_pushto("$du", "$avp(i:10)");

} else {

perl_exec("random_server");

avp_pushto("$du", "$avp(i:10)");

$sht(a=>$ci::dest_server) = $avp(i:10);

}

t_relay();

exit;

}

"random_server" is the perl script to get the FS IP address...

Seems crude but works... 

I'm sure there is probably a more elegant way to do what im trying so any advice and criticism is appreciated, thank you!

/V

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