[Users] Why is fix_nated_sdp appending 127.0.0.1 at the end of my c= lines?

[Klaus Darilion]

Maybe the message gets looped to your openser before rewriting the SDP? 
Watch the loopback device for looped messages:

ngrep -d any port 5060

regards
klaus

nick wrote:
> Everything seems fine, the SIP messages go tot he right place, the NAT 
> tests are finding everything as they should.. and in the o= row, they're 
> being replaced (more as a test, I don't think it's completely 
> neccessary) without an issue. However, in the c= line, it adds the IP 
> I've specified (for some reason, if I leave it blank it only puts 
> 127.0.0.1; or a mashup of the public address and localhost (as 
> mediaproxy runs on the same machine for the moment).
> 
> here are the two sections of code I've added.. these are the only places 
> I call fix_nated_sdp()
> 
> 
> 
> if (method=="INVITE") {
>        if (nat_uac_test("8")) {
>               fix_nated_sdp("10","89.xxx.xxx.16");
>        };
>         t_on_failure("1");
>     } else if (method == "BYE" || method == "CANCEL") {
>         end_media_session();
>     };
> 
> 
> 
> 
> onreply_route[1] {
>     if (status=~"(183)|(2[0-9][0-9])") {
>     if (client_nat_test("1")) {
>           fix_contact();
>       };
>     if (nat_uac_test("8")) {
>     fix_nated_sdp("10","89.xxx.xxx.16");
>       };
>         use_media_proxy();
>     };
> }
> 
> I'm using openser 1.1.0 notls, on a dual opteron server running CentOS 4.3
> 
> here is a trace of the code in action.. (names changed.. because I enjoy 
> search and replace)
> 
> 
> 
> U 89.xxx.xxx.8:30626 -> 89.xxx.xxx.16:5060
> SIP/2.0 200 OK.
> Via: SIP/2.0/UDP 89.xxx.xxx.16;branch=z9hG4bK674e.0d2a4f64.0.
> Via: SIP/2.0/UDP 
> 192.168.20.16:38000;received=87.xxx.xxx.99;branch=z9hG4bK-d87543-b3783334b231975b-1--d87543-;rport=38000. 
> 
> Record-Route: <sip:89.xxx.xxx.16;lr;ftag=5c63711f>.
> Contact: <sip:nick at 89.xxx.xxx.8:30626;rinstance=f0677dc7f7d4d2f0>.
> To: "Joe Blow"<sip:joe at blow.com>;tag=ee11f527.
> From: "Tom"<sip:tom at blow.com>;tag=5c63711f.
> Call-ID: NTFjYmM5Y2JhNWE5MzU2NzQ1NTMxYTg2NGQ3ZDYzNmM..
> CSeq: 1 INVITE.
> Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY, MESSAGE, 
> SUBSCRIBE, INFO.
> Content-Type: application/sdp.
> User-Agent: X-Lite release 1006e stamp 34025.
> Content-Length: 237.
> .
> v=0.
> o=- 1 2 IN IP4 192.168.1.67.
> s=CounterPath X-Lite 3.0.
> c=IN IP4 192.168.1.67.
> t=0 0.
> m=audio 31556 RTP/AVP 0 8 3 101.
> a=alt:1 1 : 0W8e8Rrk y9fAinpH 192.168.1.67 31556.
> a=fmtp:101 0-15.
> a=rtpmap:101 telephone-event/8000.
> a=sendrecv.
> 
> #
> U 89.xxx.xxx.16:5060 -> 87.xxx.xxx.99:38000
> SIP/2.0 200 OK.
> Via: SIP/2.0/UDP 
> 192.168.20.16:38000;received=87.xxx.xxx.99;branch=z9hG4bK-d87543-b3783334b231975b-1--d87543-;rport=38000. 
> 
> Record-Route: <sip:89.xxx.xxx.16;lr;ftag=5c63711f>.
> Contact: <sip:nick at 89.xxx.xxx.8:30626;rinstance=f0677dc7f7d4d2f0>.
> To: "Joe Blow"<sip:joe at blow.com>;tag=ee11f527.
> From: "Tom"<sip:tom at blow.com>;tag=5c63711f.
> Call-ID: NTFjYmM5Y2JhNWE5MzU2NzQ1NTMxYTg2NGQ3ZDYzNmM..
> CSeq: 1 INVITE.
> Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY, MESSAGE, 
> SUBSCRIBE, INFO.
> Content-Type: application/sdp.
> User-Agent: X-Lite release 1006e stamp 34025.
> Content-Length: 302.
> .
> v=0.
> o=- 1 2 IN IP4 89.xxx.xxx.16.
> s=CounterPath X-Lite 3.0.
> c=IN IP4 89.xxx.xxx.16127.0.0.1.
> t=0 0.
> m=audio 60070 RTP/AVP 0 8 3 101.
> a=alt:1 1 : 0W8e8Rrk y9fAinpH 192.168.1.67 31556.
> a=fmtp:101 0-15.
> a=rtpmap:101 telephone-event/8000.
> a=sendrecv.
> a=oldmediaip:192.168.1.67.
> a=oldmediaip:192.168.1.67.
> 
> #
> U 87.xxx.xxx.99:38000 -> 89.xxx.xxx.16:5060
> ACK sip:nick at 89.xxx.xxx.8:30626;rinstance=f0677dc7f7d4d2f0 SIP/2.0.
> Via: SIP/2.0/UDP 
> 192.168.20.16:38000;branch=z9hG4bK-d87543-7e77316e3b41bd7d-1--d87543-;rport. 
> 
> Max-Forwards: 70.
> Route: <sip:89.xxx.xxx.16;lr;ftag=5c63711f>.
> Contact: <sip:thomas at 87.xxx.xxx.99:38000>.
> To: "Joe Blow"<sip:joe at blow.com>;tag=ee11f527.
> From: "Tom"<sip:tom at blow.com>;tag=5c63711f.
> Call-ID: NTFjYmM5Y2JhNWE5MzU2NzQ1NTMxYTg2NGQ3ZDYzNmM..
> CSeq: 1 ACK.
> User-Agent: X-Lite release 1006e stamp 34025.
> Content-Length: 0.
> .
> 
> #
> U 89.xxx.xxx.16:5060 -> 89.xxx.xxx.8:30626
> ACK sip:nick at 89.xxx.xxx.8:30626;rinstance=f0677dc7f7d4d2f0 SIP/2.0.
> Record-Route: <sip:89.xxx.xxx.16;lr=on;ftag=5c63711f>.
> Via: SIP/2.0/UDP 89.xxx.xxx.16;branch=z9hG4bK674e.0d2a4f64.2.
> Via: SIP/2.0/UDP 
> 192.168.20.16:38000;received=87.xxx.xxx.99;branch=z9hG4bK-d87543-7e77316e3b41bd7d-1--d87543-;rport=38000. 
> 
> Max-Forwards: 69.
> Contact: <sip:thomas at 87.xxx.xxx.99:38000>.
> To: "Joe Blow"<sip:joe at blow.com>;tag=ee11f527.
> From: "Tom"<sip:tom at blow.com>;tag=5c63711f.
> Call-ID: NTFjYmM5Y2JhNWE5MzU2NzQ1NTMxYTg2NGQ3ZDYzNmM..
> CSeq: 1 ACK.
> User-Agent: X-Lite release 1006e stamp 34025.
> Content-Length: 0.
> P-hint: rr-enforced.
> .
> 
> 
> 
> As you can see, the code is appending 127.0.0.1 for no good reason (at 
> least that I can tell)
> 
> Any ideas (bug fixes, or tricks...)?
> 
> Nick
> 
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-- 
Klaus Darilion
nic.at