Hello,

 

I’m trying to make openser process 302 messages though I have problems(part of .cfg file below). I’ll briefly explain the call flow I’d like to have:

 

UA1 ---INVITE---> Session border controller ---INVITE--->SIP PROXY1

 

 

 

SIP PROXY1---INVITE--->REDIRECT SERVER---302 MOVED--->SIP PROXY1

 

 

SIP PROXY1---INVITE--->SIP PROXY2---INVITE---> Session border controller---INVITE-à UA2

 

This is how I want it to work. However managed to get a weird call flow were the 302 is forwarded back to the session border controller by the proxy1 which then trigger an INVITE sent to the SIP proxy2. But that is not what I want.

 

My 302 message looks like this

20:12:34.314705 IP 192.168.200.101.sip > 192.168.200.102.sip: SIP, length: 488

E.....@.@.%....e...f........SIP/2.0 302 Moved temporarily

Via: SIP/2.0/UDP 192.168.200.102;branch=z9hG4bK1658.2543f3d6.0

Via: SIP/2.0/UDP 192.168.200.10:5060;branch=z9hG4bKpis9m130dgj04b08v7k1.1

To: "22222"<sip:22222@btsip.bt.com>;tag=cc0e227ef05fff2dd833db745f3905a6.25f2

From: "111"<sip:11111@btsip.bt.com>;tag=SDvto0501-df614a6e

Call-ID: SDvto0501-515b91532ff7927a8345f39add52762f-06ahc50

CSeq: 1 INVITE

Contact: , sip:22222@mydomain.com;maddr=192.168.200.103:5060;side=term>

Content-Length: 0

 

192.168.200.101 is redirect server

192.168.200.102 is the proxy1

192.168.200.103 is proxy2

192.168.200.10 is session border controller

 

1. I would like to have proxy1 process the 302 message but there seems (from other mails on the mailing list) that openser does not allow routing depending on maddr in the Contact field. Sic L <- how can this routing decision been taken , using rewritehostport after get_redirect(“*”) is kind of ignored. The only workaround I have is to change the mydomain.com to the IP of proxy2 to get the automatic redirect
2. How can I block the redirect to the session border controller and send an invite right away to the proxy2?  

 

Here are the relevant part of the logic I use in proxy1 to handle the 302

 

I’m using this to trigger the forward to the redirect server:

 

                               lookup("aliases");

                                #dest is remote

                                if (!lookup("location")) {

                                        t_on_failure("3");

                                        xlog("L_INFO","redirect invite to SLS\n");

                                        #change orig to term in request URI

                                        $avp(s:request_uri_to_use)=$ru;

                                        avp_subst("$avp(s:request_uri_to_use)", "/orig/term/");

                                        avp_pushto("$ru","$avp(s:request_uri_to_use)");

 

                                        #forward("udp:192.168.200.101:5060");

                                        #exit;

                                        rewritehostport("192.168.200.101:5060");

                                        if(!t_relay())

                                        {

                                                sl_reply_error();

                                        }

                                        return;

 

and this to try to handle the 302 that is received but it does not behave like I want:

 

failure_route[3]

{

        xlog("L_WARN","redirect FAILUREROUTE: time_t=$Ts messageid=$mi remark=here we are $bR\n");

        if(t_check_status("3[0-9][0-9]"))

        {

                    get_redirects("*");

                xlog("L_WARN","^method=$rm ^ruri=$ru ^messageid=$mi^remark=2status is 3xx\n--$br--\nbR((($bR)))\n");

                #rewritehost("$(ru{uri.maddr})");

        serialize_branches(0);

        }

        xlog("L_WARN","nextbranch\n");

        #next_branches();

        #t_on_failure("3");

        #t_relay();

        return;

        #t_reply("404", "No branches left");

}

 

 

Help would be appreciated

 

Cheers

erik