[OpenSIPS-Users] mediaproxy/rtpproxy problem with reinvites

[Iñaki Baz Castillo]

2008/10/31 Jeff Pyle <jpyle at fidelityvoice.com>:
> How *should* rtpproxy/mediaproxy handle reinvites?  I only got this far by
> using unforce_rtp_proxy, then force_rtp_proxy on a loose-routed INVITE w/
> SDP (in other words a reinvite).  Should that be necessary?  Might the "s"
> swap flag be helpful in this scenario somewhere?

I do the following:

In in-dialog section (loose-route) I run force_rtp_proxy("l"). In case
the initial INVITE used RtpProxy then this command re-enables it and
$rc = 1. In case the initial INVITE didn't use RtpProxy then this
command return other value (false) and no SDP modification is
performed.
In the first case, I set a flag that I check in onreply_route since
the 180/183/200 responses also need to run "force_rtp_proxy":


# in-dialog:
          t_on_reply("1");
          force_rtp_proxy("l");
                      if ($rc == 1) {
                                setbflag(9);  # Enable RtpProxy in the reply.
                        }


onreply_route[1] {

        if (status =~ "(180)|(183)|2[0-9][0-9]") {
                if (isbflagset(6) || nat_uac_test("1"))
                        fix_nated_contact();
                if (isbflagset(9) && has_body("application/sdp") && $cl != 0) {
                        force_rtp_proxy("l");
                }
        }

}

-- 
Iñaki Baz Castillo
<ibc at aliax.net>