[Serusers] SER + RTPProxy don't seem to work together??

[Marian Dumitru]

Hi Sun Zongjun,

fix_natted_sdp() is used only for fixing the SDP (like direction=active 
line, force proxy's IP in media, etc) without using RTPProxy.
You should use force_rtp_proxy() instead.

Best regards,
Marian

szj wrote:
> Hi,
> 
> My testing environment is as follows.
> SER+RTPProxy's ip: 111.122.133.100
> NAT device's ip:   111.122.133.4
> SIP UA A's IP:  192.168.0.62:9000
> SIP UA B's IP:   111.122.133.100:5000
> If I use the SiP UA A to call UA B outside the
> NAT clouds, I think the SER should communicate
> with RTPProxy and modify the INVITE message's
> SDP message's media IP and Port. But I checked
> the UA B's log and found that the ser only changed
> the SDP''s IP, not the media port.
> Here is the UA B's log:
> 
> INVITE sip:861111 at 111.122.133.100:5000 SIP/2.0^M
> Record-Route: <sip:111.122.133.100;ftag=1509219066;lr>^M
> Via: SIP/2.0/UDP 111.122.133.100;branch=z9hG4bKb6f1.9cf45a65.0^M
> Via: SIP/2.0/UDP
> 192.168.0.62:9000;rport=12072;received=111.122.133.4;branch=z9hG4bK1145650245^M 
> 
> 
> From: <sip:862222 at sip.suntest.com>;tag=1509219066^M
> To: <sip:861111 at sip.suntest.com>^M
> Call-ID: 638544678 at 192.168.0.62^M
> CSeq: 20 INVITE^M
> Contact: <sip:862222 at 111.122.133.4:12072>^M
> Max-Forwards:  ^M
> User-Agent: User Agent0.1^M
> Subject: This is my first SIP call^M
> Expires: 120^M
> P-Info: VQem2WySucv0oaiOqT7HAmtlPhMYPd3Kn58o4xX9o5tL^M
> P-Need-Security: Yes^M
> Require: P-Need-Security^M
> Allow: INVITE, ACK, CANCEL, BYE, OPTIONS, REFER, SUBSCRIBE, NOTIFY,
> MESSAGE^M
> Content-Type: application/sdp^M
> P-Security-Nobody: abnPtllQ4gF5deL2u5UfUnfzUcJhomFI+yj1mYR374s=^M
> Content-Length: 310^M
> P-hint: usrloc applied^M
> ^M
> v=0^M
> o=nobody 20041028 20000001 IN IP4 192.168.0.62^M
> s=A call^M
> c=IN IP4 111.122.133.4^M
> t=1112000912 1112004512^M
> m=audio 9500 RTP/AVP 0 8^M
> a=rtpmap:0 PCMU/8000^M
> a=rtpmap:8 PCMA/8000^M
> m=video 10000 RTP/AVP 98 31^M
> a=rtpmap:98 H263/90000^M
> a=rtpmap:31 vf=4/CIF/1/768^M
> a=direction:active^M
> a=oldmediaip:192.168.0.62^M
> the UA A's original audio port is 9500, you see
> it is unmodified through the SER.
> 
> Next is the part of my SER.cfg config:
> 
> if(method == "INVITE")
> {
>   fix_nated_sdp("3");
> };
> I thinks the SER should relaced the SDP media IP and port
> with the return valued by RTPProxy. That is, media ip is not
> the NAT device's IP, but RTPProxy's IP, 111.122.133.100, and
> the audio port is the port returned by RTPProxy. Now I can't
> see the modification of the media port by RTPPProxy.
> 
> Am I right??
> 
> Thanks for your help!
> Best Regards.
> 
> Sun Zongjun

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