[OpenSIPS-Users] B2B + top hiding + origination media IP

[Kamen Petrov]

Hi Ovidu,

I do not perform any changes on the received invite.

The "top hiding" does it and the problem is.. it does not change only the
media IP. Everything else goes OK.

Are you saying the "top hiding" does not work properly with the nathelper ?

Thanks
-- Kamen




On 2 February 2011 19:41, Ovidiu Sas <osas at voipembedded.com> wrote:

> The B2B module is operating on the received INVITE.  Any changes that
> you make to the received INVITE are not visible by the B2B module.
> Use a proxy to perform whatever you want to do (rtpproxy, accounting,
> etc.) and a separate server only for b2b (top hiding).
>
> Regards,
> Ovidiu Sas
>
> On Wed, Feb 2, 2011 at 12:11 PM, Kamen Petrov <kamen.petrov at gmail.com>
> wrote:
> > Hi Guys,
> >
> > I am testing the following call flow:
> > Soft Phone => opensips (configured for B2B) => third party termination
> SIP
> > proxy
> >
> > Here is my config:
> >
> > modparam("b2b_entities", "script_req_route", "b2b_request")
> > modparam("b2b_entities", "script_reply_route", "b2b_reply")
> >
> >
> >
> > local_route {
> >         xlog("================LOCAL_ROUTE ($rm - $rr)============\n");
> >         setflag(22);
> >         if (is_method("INVITE")) {
> >                 engage_rtp_proxy("e","<OPENSIPS_IP>");
> >                 exit;
> >         }
> >         else if (is_method("BYE") ) {
> >                 xlog("================BYE============\n");
> >         }
> > }
> >
> >
> > route[b2b_request] {
> >         $avp(s:source_ip_address) := $si;
> >         perl_exec("messagedump_route", "messages");
> >         xlog("b2b_request ($ci) ($rm - $rr)\n");
> > }
> >
> >
> > route[b2b_reply] {
> >         $avp(s:source_ip_address) := $si;
> >         perl_exec("messagedump_reply", "messages");
> >         xlog("b2b_reply ($ci) - $rm - $rr\n");
> > }
> >
> >
> > route{
> > ...
> >         if (is_method("INVITE") &&
> perl_exec("check_for_forwarding_number"))
> > {
> >                 engage_rtp_proxy("e","<OPENSIPS_IP>");
> >                 xlog("LOG: INVITE AUTHENTICATED TO: $avp(s:uid) ; FWD TO:
> > $avp(s:fwd_ip)\n");
> >                 setflag(1); # do accounting
> >                 xlog("L_ERR", "LOG: to uri=[$tu]
> [$avp(s:sip_proxy_ip)]\n");
> >
> >                 b2b_init_request("top hiding");
> >                 exit;
> >         };
> >
> > ...
> > }
> >
> >
> > What happens is:
> > - INVITE from the soft phone to the opensips
> > - catched by the B2B and relayed to the third party SIP proxy + trying
> > returned to the soft phone
> > - "Session Progress" received from the third party SIP proxy -> opensips
> ->
> > my soft phone
> >
> > At that stage, here is what I have on the soft phone log:
> > 18:56:50 UDP Packet Received from <OPENSIPS_IP>:5060
> > <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
> > SIP/2.0 183 Session Progress
> > Via: SIP/2.0/UDP 192.168.1.2:5070;rport=5070;branch=z9hG4bK673604
> > To: <sip:359883409291@<OPENSIPS_DOMAIN>:5060>;tag=B2B.113.667
> > From: "359883327749" <sip:359883327749@<OPENSIPS_DOMAIN>:5060>;tag=1040
> > Call-ID: 1296636915-3604-SALASWORK at 192.168.1.2
> > CSeq: 361 INVITE
> > Content-Type: application/sdp
> > Contact: <sip:<OPENSIPS_IP>:5060;transport=udp>
> > Server: OpenSIPS (1.6.3-notls (x86_64/linux))
> > Content-Length: 184
> >
> > v=0
> > o=SBCSIPUAS 900116523 1 IN IP4 <THIRD_PARTY_SIP_PROXY_IP>
> > s=SBCSIPUAS SIP STACK v1.0
> > c=IN IP4 <THIRD_PARTY_SIP_PROXY_IP>
> > t=0 0
> > m=audio 17900 RTP/AVP 0
> > a=rtpmap:0 PCMU/8000
> > a=sendrecv
> > a=maxptime:30
> >
> >
> > As can be seen, the media IP is not rewritten by the opensips and the IP
> > passed to my soft phone is the IP of the termination IP for the opensips
> > (i.e. the third party SIP proxy IP). Because of that, my soft phone
> starts
> > the RTP directly to my provider instead trough the RTP proxy that is
> > attached to the opensips.
> > Just to clarify, the media IP of my soft phone is not passed to my
> provider
> > - that case is handled good.
> >
> >
> > Any idea what is missing ?
> >
> > Thanks in advance.
> > -- Kamen
> >
> > _______________________________________________
> > Users mailing list
> > Users at lists.opensips.org
> > http://lists.opensips.org/cgi-bin/mailman/listinfo/users
> >
> >
>
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