Re: [SR-Users] Record-route in dialog requests

Thanks Daniel,

That did the trick!

BR, Spencer

On Oct 18, 2013, at 10:32 AM, Daniel-Constantin Mierla miconda@gmail.com wrote:

Hello,

On 10/18/13 7:25 PM, Spencer Thomason wrote:

...

Hello, In our network topology we use Kamailio at the edge of our network proxying requests from a core set of FreeSWITCH servers.

I have a new termination provider where a session timer ReINVITE fails because the ACK is sent to the contact address of the FreeSWITCH server, not the proxy. Can I Record-Route these in dialog requests? If so, where should I do it in the config?

A quick google search returned this thread: https://lists.cs.columbia.edu/pipermail/sip-implementors/2003-June/005089.ht... which confused me a little.

yes, you can re-enforce record route for requests within dialog, although not required by specs. See below the position.

...

My in dialog config block looks like this: # Handle requests within SIP dialogs route[WITHINDLG] { if (has_totag()) { # sequential request withing a dialog should # take the path determined by record-routing if (loose_route()) {

Add it after the above line, like:

               record_route();

...

        if (is_method("BYE")) {
            setflag(FLT_ACC); # do accounting ...
            setflag(FLT_ACCFAILED); # ... even if the transaction fails
            setflag(FLT_SIPTRACE);
        }
        if (is_method("ACK")) {
            # ACK is forwarded statelessy
                route(NATMANAGE);
            }
        route(RELAY);
    } else {
        if ( is_method("ACK") ) {
            if (t_check_trans()) {
                # no loose-route, but stateful ACK;
                # must be an ACK after a 487
                # or e.g. 404 from upstream server
                t_relay();
                exit;
            } else {
                # ACK without matching transaction ... ignore and discard
                exit;
            }
        }
        sl_send_reply("404","Not here");
    }
    exit;
}

}

Cheers, Daniel

-- Daniel-Constantin Mierla - http://www.asipto.com http://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda Kamailio Advanced Trainings - Berlin, Nov 25-28; Miami, Nov 18-20, 2013

• more details about Kamailio trainings at http://www.asipto.com -

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