[Devel] fix_nated_sdp(flags, IP) does not update the IP inside SDP

Ovidiu Sas sip.nslu at gmail.com
Mon Jun 5 21:22:43 CEST 2006 

Hi Bogdan,

Here's the setup:
 - openser is running on a multihomed box: 10.110.1.174/10.111.5.15
 - the mhomed is set to 1
 - an INVITE is received on 10.110.1.174 interface and sent out on the
10.111.5.15 one

I will provide two scenarios: working and non-working:

Here's a working example:
pls note the ERROR probe inside the logs:

<openser.cfg>
                                if (!search("^Content-Length:[ ]*0")) {
                                        xlog("L_INFO", "S
fix_nated_sdp(3)\n");
                                        fix_nated_sdp("3");
                                        xlog("L_INFO", "E
fix_nated_sdp()\n");
                                };

openser.log:
 S fix_nated_sdp(3)
 parse_headers: flags=ffffffffffffffff
 DEBUG:check_content_type: type <application/sdp> found valid
 ERROR: extract_mediaip: no `c=' in SDP
 xl_printf: final buffer length 18
 E fix_nated_sdp()


incoming INVITE:
INVITE sip:4163481513 at 10.110.1.174:5060;transport=udp SIP/2.0.
Record-Route: <sip:10.110.48.7;ftag=6cf2bcbc-soma;lr>.
Record-Route: <sip:10.110.49.7;r2=on;ftag=6cf2bcbc-soma;lr=on>.
Record-Route: <sip:10.110.50.1;r2=on;ftag=6cf2bcbc-soma;lr=on>.
Via: SIP/2.0/UDP 10.110.48.7;branch=z9hG4bK225e.8aade426.0.
Via: SIP/2.0/UDP 10.110.49.7;branch=z9hG4bK225e.14b9ec51.0.
Via: SIP/2.0/UDP 10.110.50.4:5060;branch=z9hG54b5de05.
From: line0 <sip:4165550002 at 10.110.48.7>;tag=6cf2bcbc-soma.
To: <sip:4163481513 at 10.110.48.7>.
Call-ID: 3ba8f990-53ac15fc at 10.110.50.4.
CSeq: 69 INVITE.
Contact: line0 <sip:4165550002 at 10.110.50.4;transport=udp>.
Max-Forwards: 68.
User-Agent: ssua-v6.1.6.
Organization: .
Priority: normal.
Supported: 100rel.
P-Preferred-Identity: line0 <sip:4165550002 at 10.110.48.7>.
Remote-Party-ID: line0 <sip:4165550002 at 10.110.48.7
>;party=calling;screen=yes;privacy=off.
SOMA-Extension: testcall.
Supported: timer.
Min-SE: 600.
Allow: ACK, BYE, CANCEL, INFO, INVITE, PRACK, NOTIFY, OPTIONS, SUBSCRIBE.
Accept: application/sdp, application/simple-message-summary.
Content-Type: application/sdp.
Content-Length:   210.
.
v=0.
o=ssua-v6.1.6 34 1 IN IP4 10.110.50.4.
s=Session SDP.
c=IN IP4 10.110.50.4.
t=0 0.
m=audio 10038 RTP/AVP 18 101.
a=rtpmap:18 G729/8000.
a=fmtp:18 annexb=yes.
a=ptime:10.
a=rtpmap:101 telephone-event/8000.

outgoing INVITE:
INVITE sip:4163481513 at 10.111.3.241:5060;transport=udp SIP/2.0
Record-Route: <sip:10.111.5.15;r2=on;lr;ftag=6cf2bcbc-soma>
Record-Route: <sip:10.110.1.174;r2=on;lr;ftag=6cf2bcbc-soma>
Record-Route: <sip:10.110.48.7;ftag=6cf2bcbc-soma;lr>
Record-Route: <sip:10.110.49.7;r2=on;ftag=6cf2bcbc-soma;lr=on>
Record-Route: <sip:10.110.50.1;r2=on;ftag=6cf2bcbc-soma;lr=on>
Via: SIP/2.0/UDP 10.111.5.15;branch=z9hG4bK225e.5f208097.0
Via: SIP/2.0/UDP 10.110.48.7;branch=z9hG4bK225e.8aade426.0
Via: SIP/2.0/UDP 10.110.49.7;branch=z9hG4bK225e.14b9ec51.0
Via: SIP/2.0/UDP 10.110.50.4:5060;branch=z9hG54b5de05
From: line0 <sip:4165550002 at 10.110.48.7>;tag=6cf2bcbc-soma
To: <sip:4163481513 at 10.110.48.7>
Call-ID: 3ba8f990-53ac15fc at 10.110.50.4
CSeq: 69 INVITE
Contact: line0 <sip:4165550002 at 10.110.50.4;transport=udp>
Max-Forwards: 67
User-Agent: ssua-v6.1.6
Organization:
Priority: normal
Supported: 100rel
P-Preferred-Identity: line0 <sip:4165550002 at 10.110.48.7>
Remote-Party-ID: line0 <sip:4165550002 at 10.110.48.7
>;party=calling;screen=yes;privacy=off
SOMA-Extension: testcall
Supported: timer
Min-SE: 600
Allow: ACK, BYE, CANCEL, INFO, INVITE, PRACK, NOTIFY, OPTIONS, SUBSCRIBE
Accept: application/sdp, application/simple-message-summary
Content-Type: application/sdp
Content-Length: 256

v=0
o=ssua-v6.1.6 34 1 IN IP4 10.110.50.4
s=Session SDP
c=IN IP4 10.110.48.7
t=0 0
m=audio 10038 RTP/AVP 18 101
a=rtpmap:18 G729/8000
a=fmtp:18 annexb=yes
a=ptime:10
a=rtpmap:101 telephone-event/8000
a=direction:active
a=oldmediaip:10.110.50.4


Note: the outgoing INVITE is big and it was fragmented!!!



The non-working scenario:

<openser.cfg>
                                if (!search("^Content-Length:[ ]*0")) {
                                        xlog("L_INFO", "S fix_nated_sdp(1,
10.111.5.15)\n");
                                        fix_nated_sdp("1", "10.111.5.15");
                                        xlog("L_INFO", "E
fix_nated_sdp()\n");
                                };


openser.log:
 S fix_nated_sdp(1, 10.111.5.15)
 parse_headers: flags=ffffffffffffffff
 DEBUG:check_content_type: type <application/sdp> found valid
 xl_printf: final buffer length 18
 E fix_nated_sdp()


Incoming INVITE:
INVITE sip:4163481513 at 10.110.1.174:5060;transport=udp SIP/2.0.
Record-Route: <sip:10.110.48.7;ftag=755cbe38-soma;lr>.
Record-Route: <sip:10.110.49.7;r2=on;ftag=755cbe38-soma;lr=on>.
Record-Route: <sip:10.110.50.1;r2=on;ftag=755cbe38-soma;lr=on>.
Via: SIP/2.0/UDP 10.110.48.7;branch=z9hG4bK0e74.76905b42.0.
Via: SIP/2.0/UDP 10.110.49.7;branch=z9hG4bK0e74.8a13c771.0.
Via: SIP/2.0/UDP 10.110.50.4:5060;branch=z9hG25465b05.
From: line0 <sip:4165550002 at 10.110.48.7>;tag=755cbe38-soma.
To: <sip:4163481513 at 10.110.48.7>.
Call-ID: 5444e91a-0e972555 at 10.110.50.4.
CSeq: 73 INVITE.
Contact: line0 <sip:4165550002 at 10.110.50.4;transport=udp>.
Max-Forwards: 68.
User-Agent: ssua-v6.1.6.
Organization: .
Priority: normal.
Supported: 100rel.
P-Preferred-Identity: line0 <sip:4165550002 at 10.110.48.7>.
Remote-Party-ID: line0 <sip:4165550002 at 10.110.48.7
>;party=calling;screen=yes;privacy=off.
SOMA-Extension: testcall.
Supported: timer.
Min-SE: 600.
Allow: ACK, BYE, CANCEL, INFO, INVITE, PRACK, NOTIFY, OPTIONS, SUBSCRIBE.
Accept: application/sdp, application/simple-message-summary.
Content-Type: application/sdp.
Content-Length:   210.
.
v=0.o=ssua-v6.1.6 36 1 IN IP4 10.110.50.4.
s=Session SDP.
c=IN IP4 10.110.50.4.
t=0 0.
m=audio 10094 RTP/AVP 18 101.
a=rtpmap:18 G729/8000.
a=fmtp:18 annexb=yes.
a=ptime:10.
a=rtpmap:101 telephone-event/8000.


Outgoing INVITE:
INVITE sip:4163481513 at 10.111.3.241:5060;transport=udp SIP/2.0
Record-Route: <sip:10.111.5.15;r2=on;lr;ftag=755cbe38-soma>
Record-Route: <sip:10.110.1.174;r2=on;lr;ftag=755cbe38-soma>
Record-Route: <sip:10.110.48.7;ftag=755cbe38-soma;lr>
Record-Route: <sip:10.110.49.7;r2=on;ftag=755cbe38-soma;lr=on>
Record-Route: <sip:10.110.50.1;r2=on;ftag=755cbe38-soma;lr=on>
Via: SIP/2.0/UDP 10.111.5.15;branch=z9hG4bK0e74.66d85c63.0
Via: SIP/2.0/UDP 10.110.48.7;branch=z9hG4bK0e74.76905b42.0
Via: SIP/2.0/UDP 10.110.49.7;branch=z9hG4bK0e74.8a13c771.0
Via: SIP/2.0/UDP 10.110.50.4:5060;branch=z9hG25465b05
From: line0 <sip:4165550002 at 10.110.48.7>;tag=755cbe38-soma
To: <sip:4163481513 at 10.110.48.7>
Call-ID: 5444e91a-0e972555 at 10.110.50.4
CSeq: 73 INVITE
Contact: line0 <sip:4165550002 at 10.110.50.4;transport=udp>
Max-Forwards: 67
User-Agent: ssua-v6.1.6
Organization:
Priority: normal
Supported: 100rel
P-Preferred-Identity: line0 <sip:4165550002 at 10.110.48.7>
Remote-Party-ID: line0 <sip:4165550002 at 10.110.48.7
>;party=calling;screen=yes;privacy=off
SOMA-Extension: testcall
Supported: timer
Min-SE: 600
Allow: ACK, BYE, CANCEL, INFO, INVITE, PRACK, NOTIFY, OPTIONS, SUBSCRIBE
Accept: application/sdp, application/simple-message-summary
Content-Type: application/sdp
Content-Length: 230

v=0
o=ssua-v6.1.6 36 1 IN IP4 10.110.50.4
s=Session SDP
c=IN IP4 10.110.50.4
t=0 0
m=audio 10094 RTP/AVP 18 101
a=rtpmap:18 G729/8000
a=fmtp:18 annexb=yes
a=ptime:10
a=rtpmap:101 telephone-event/8000
a=direction:active


Note: there are no ERROR probes like in the previous scenario, but the IP is
untouched.



Regards,
-ovi
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