[Users] Problem with TCP INVITE being bridged by OpenSER to UDP

Klaus Darilion klaus.mailinglists at pernau.at
Fri Nov 10 12:11:45 CET 2006 

Hi!

The client which uses TCP is broken. The ACK and BYE are in-dialog 
requests and MUST contain the callees Contact: URI as request URI. That 
means:

ACK sip:alice at 192.168.0.3:5070 SIP/2.0
instead of
ACK sip:alice at siptest2.com:5060 SIP/2.0

regards
klaus

Russ Daigle wrote:
> I have a scenario where user Alice registered with OpenSER with UDP port 
> 5070.  Then, I have user Bob sending an invite to Alice via the OpenSER 
> using TCP.   Hence, OpenSER is bridging my TCP SIP requests to UDP (and 
> vice versa for the responses).
> 
> Here is the sequence:
> 
> Alice  ----- TCP Invite ----->  OpenSER   ---------- UDP Invite ------>  
> Alice
> 
> Alice responds back with 180 ringing, then 200 Ok.
> 
> Upon getting the 200 OK, Bob sends an ACK (to complete the INVITE), 
> followed by an Immediate BYE.
> 
> THE TROUBLE IS......  the ACK and the BYE that Bob sends are dropped by 
> OpenSER, and never forwarded onto Alice!!!!   I see nothing wrong with 
> the messages.   WHat is happening?
> 
> 
> sip:~ russdaigle$ sudo tcpdump -i en0 -A -q -s 2000 port 5060
> Password:
> tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
> listening on en0, link-type EN10MB (Ethernet), capture size 2000 bytes
> 
> The following shows an sip-invite-bye from mutator using TCP to mjsip (via
> OPENSER).   Everything after the ACK is dropped and not sent on.
> 
> Then, is a similar but UDP exchange.  In that case, we get a 404 not found
> in response to the BYE!!!
> 
> 01:17:59.553909 IP 10.10.2.6.50135 > 10.10.1.234.sip: tcp 588
> INVITE sip:alice at siptest2.com:5060 SIP/2.0
> Via: SIP/2.0/TCP 10.10.2.6:50135;branch=z9hG4bK85478043
> From: Bob <sip:bob at siptest2.com>;tag=fromhackblah
> To: Alice <sip:alice at siptest2.com:5060>
> CSeq: 1 INVITE
> Call-ID: SYRGNUXWKNZNXXPXUAMUTJXXPPMXWKVJFAXUNUUTGG at musecurity.com
> Contact: <sip:bob at 10.10.2.6>;transport=TCP
> Max-Forwards: 70
> Content-Type: application/sdp
> Content-Length: 195
> 
> v=0
> o=- 817933771 817933775 IN IP4 10.10.2.6
> s=darkness
> c=IN IP4 10.10.2.6
> t=0 0
> m=audio 5000 RTP/AVP 0 4 97
> a=rtpmap:0 PCMU/8000
> a=rtpmap:4 G723/8000/1
> a=rtpmap:97 telephone-event/8000
> 
> 
> 01:17:59.554929 IP 10.10.1.234.sip > 10.10.2.6.50135: tcp 536
> SIP/2.0 100 trying -- your call is important to us
> Via: SIP/2.0/TCP 10.10.2.6:50135;branch=z9hG4bK85478043
> From: Bob <sip:bob at siptest2.com>;tag=fromhackblah
> To: Alice <sip:alice at siptest2.com:5060>
> CSeq: 1 INVITE
> Call-ID: SYRGNUXWKNZNXXPXUAMUTJXXPPMXWKVJFAXUNUUTGG at musecurity.com
> Server: OpenSer (1.1.0-notls (i386/darwin))
> Content-Length: 0
> Warning: 392 10.10.1.234:5060 "Noisy feedback tells:  pid=11962 
> req_src_ip=10.10.2.6 req_src_port=50135 
> in_uri=sip:alice at siptest2.com:5060 out_uri=sip:alice at 10.10.2.6:5070 
> via_cnt==1"
> 
> 
> 01:17:59.555035 IP 10.10.1.234.sip > 10.10.2.6.5070: UDP, length 814
> INVITE sip:alice at 10.10.2.6:5070 SIP/2.0
> Record-Route: <sip:10.10.1.234;r2=on;lr=on;ftag=fromhackblah>
> Record-Route: <sip:10.10.1.234;transport=tcp;r2=on;lr=on;ftag=fromhackblah>
> Via: SIP/2.0/UDP 10.10.1.234;branch=z9hG4bK9316.e5ab8ce2.0;i=b1
> Via: SIP/2.0/TCP 10.10.2.6:50135;branch=z9hG4bK85478043
> From: Bob <sip:bob at siptest2.com>;tag=fromhackblah
> To: Alice <sip:alice at siptest2.com:5060>
> CSeq: 1 INVITE
> Call-ID: SYRGNUXWKNZNXXPXUAMUTJXXPPMXWKVJFAXUNUUTGG at musecurity.com
> Contact: <sip:bob at 10.10.2.6>;transport=TCP
> Max-Forwards: 69
> Content-Type: application/sdp
> Content-Length: 195
> P-hint: usrloc applied
> 
> v=0
> o=- 817933771 817933775 IN IP4 10.10.2.6
> s=darkness
> c=IN IP4 10.10.2.6
> t=0 0
> m=audio 5000 RTP/AVP 0 4 97
> a=rtpmap:0 PCMU/8000
> a=rtpmap:4 G723/8000/1
> a=rtpmap:97 telephone-event/8000
> 
> 
> 01:17:59.667962 IP 10.10.2.6.5070 > 10.10.1.234.sip: UDP, length 364
> SIP/2.0 100 Trying
> Via: SIP/2.0/UDP 10.10.1.234;branch=z9hG4bK9316.e5ab8ce2.0;i=b1
> Via: SIP/2.0/TCP 10.10.2.6:50135;branch=z9hG4bK85478043
> To: Alice <sip:alice at siptest2.com:5060>
> From: Bob <sip:bob at siptest2.com>;tag=fromhackblah
> Call-ID: SYRGNUXWKNZNXXPXUAMUTJXXPPMXWKVJFAXUNUUTGG at musecurity.com
> CSeq: 1 INVITE
> Server: mjsip stack 1.6
> Content-Length: 0
> 
> 
> 01:17:59.699680 IP 10.10.2.6.5070 > 10.10.1.234.sip: UDP, length 505
> SIP/2.0 180 Ringing
> Via: SIP/2.0/UDP 10.10.1.234;branch=z9hG4bK9316.e5ab8ce2.0;i=b1
> Via: SIP/2.0/TCP 10.10.2.6:50135;branch=z9hG4bK85478043
> Record-Route: <sip:10.10.1.234;r2=on;lr=on;ftag=fromhackblah>
> Record-Route: <sip:10.10.1.234;transport=tcp;r2=on;lr=on;ftag=fromhackblah>
> To: Alice <sip:alice at siptest2.com:5060>
> From: Bob <sip:bob at siptest2.com>;tag=fromhackblah
> Call-ID: SYRGNUXWKNZNXXPXUAMUTJXXPPMXWKVJFAXUNUUTGG at musecurity.com
> CSeq: 1 INVITE
> Server: mjsip stack 1.6
> Content-Length: 0
> 
> 
> 01:17:59.699683 IP 10.10.2.6.5070 > 10.10.1.234.sip: UDP, length 728
> SIP/2.0 200 OK
> Via: SIP/2.0/UDP 10.10.1.234;branch=z9hG4bK9316.e5ab8ce2.0;i=b1
> Via: SIP/2.0/TCP 10.10.2.6:50135;branch=z9hG4bK85478043
> Record-Route: <sip:10.10.1.234;r2=on;lr=on;ftag=fromhackblah>
> Record-Route: <sip:10.10.1.234;transport=tcp;r2=on;lr=on;ftag=fromhackblah>
> To: Alice <sip:alice at siptest2.com:5060>;tag=7c452a3254b2e183
> From: Bob <sip:bob at siptest2.com>;tag=fromhackblah
> Call-ID: SYRGNUXWKNZNXXPXUAMUTJXXPPMXWKVJFAXUNUUTGG at musecurity.com
> CSeq: 1 INVITE
> Contact: <sip:alice at 192.168.0.3:5070>
> Server: mjsip stack 1.6
> Content-Length: 135
> Content-Type: application/sdp
> 
> v=0
> o=- 817933771 817933775 IN IP4 10.10.2.6
> s=darkness
> c=IN IP4 192.168.0.3
> t=0 0
> m=audio 21000 RTP/AVP 0
> a=rtpmap:0 PCMU/8000
> 
> 
> 01:17:59.700273 IP 10.10.1.234.sip > 10.10.2.6.50135: tcp 440
> SIP/2.0 180 Ringing
> Via: SIP/2.0/TCP 10.10.2.6:50135;branch=z9hG4bK85478043
> Record-Route: <sip:10.10.1.234;r2=on;lr=on;ftag=fromhackblah>
> Record-Route: <sip:10.10.1.234;transport=tcp;r2=on;lr=on;ftag=fromhackblah>
> To: Alice <sip:alice at siptest2.com:5060>
> From: Bob <sip:bob at siptest2.com>;tag=fromhackblah
> Call-ID: SYRGNUXWKNZNXXPXUAMUTJXXPPMXWKVJFAXUNUUTGG at musecurity.com
> CSeq: 1 INVITE
> Server: mjsip stack 1.6
> Content-Length: 0
> 
> 
> 01:17:59.700299 IP 10.10.1.234.sip > 10.10.2.6.50135: tcp 663
> SIP/2.0 200 OK
> Via: SIP/2.0/TCP 10.10.2.6:50135;branch=z9hG4bK85478043
> Record-Route: <sip:10.10.1.234;r2=on;lr=on;ftag=fromhackblah>
> Record-Route: <sip:10.10.1.234;transport=tcp;r2=on;lr=on;ftag=fromhackblah>
> To: Alice <sip:alice at siptest2.com:5060>;tag=7c452a3254b2e183
> From: Bob <sip:bob at siptest2.com>;tag=fromhackblah
> Call-ID: SYRGNUXWKNZNXXPXUAMUTJXXPPMXWKVJFAXUNUUTGG at musecurity.com
> CSeq: 1 INVITE
> Contact: <sip:alice at 192.168.0.3:5070>
> Server: mjsip stack 1.6
> Content-Length: 135
> Content-Type: application/sdp
> 
> v=0
> o=- 817933771 817933775 IN IP4 10.10.2.6
> s=darkness
> c=IN IP4 192.168.0.3
> t=0 0
> m=audio 21000 RTP/AVP 0
> a=rtpmap:0 PCMU/8000
> 
> 01:17:59.804566 IP 10.10.2.6.50135 > 10.10.1.234.sip: tcp 435
> ACK sip:alice at siptest2.com:5060 SIP/2.0
> Route: <sip:10.10.1.234;r2=on;lr=on;ftag=fromhackblah>
> Route: <sip:10.10.1.234;transport=tcp;r2=on;lr=on;ftag=fromhackblah>
> Via: SIP/2.0/TCP 10.10.2.6:50135;branch=z9hG4bK59972
> From: Bob <sip:bob at siptest2.com>;tag=fromhackblah
> To: Alice <sip:alice at siptest2.com:5060>;tag=7c452a3254b2e183
> CSeq: 1 ACK
> Call-ID: SYRGNUXWKNZNXXPXUAMUTJXXPPMXWKVJFAXUNUUTGG at musecurity.com
> Max-Forwards: 70
> 
> 01:17:59.839493 IP 10.10.2.6.50135 > 10.10.1.234.sip: tcp 435
> BYE sip:alice at siptest2.com:5060 SIP/2.0
> Route: <sip:10.10.1.234;r2=on;lr=on;ftag=fromhackblah>
> Route: <sip:10.10.1.234;transport=tcp;r2=on;lr=on;ftag=fromhackblah>
> Via: SIP/2.0/TCP 10.10.2.6:50135;branch=z9hG4bK68444
> From: Bob <sip:bob at siptest2.com>;tag=fromhackblah
> To: Alice <sip:alice at siptest2.com:5060>;tag=7c452a3254b2e183
> CSeq: 2 BYE
> Call-ID: SYRGNUXWKNZNXXPXUAMUTJXXPPMXWKVJFAXUNUUTGG at musecurity.com
> Max-Forwards: 70
> 
> 01:18:00.199306 IP 10.10.2.6.5070 > 10.10.1.234.sip: UDP, length 728
> SIP/2.0 200 OK
> Via: SIP/2.0/UDP 10.10.1.234;branch=z9hG4bK9316.e5ab8ce2.0;i=b1
> Via: SIP/2.0/TCP 10.10.2.6:50135;branch=z9hG4bK85478043
> Record-Route: <sip:10.10.1.234;r2=on;lr=on;ftag=fromhackblah>
> Record-Route: <sip:10.10.1.234;transport=tcp;r2=on;lr=on;ftag=fromhackblah>
> To: Alice <sip:alice at siptest2.com:5060>;tag=7c452a3254b2e183
> From: Bob <sip:bob at siptest2.com>;tag=fromhackblah
> Call-ID: SYRGNUXWKNZNXXPXUAMUTJXXPPMXWKVJFAXUNUUTGG at musecurity.com
> CSeq: 1 INVITE
> Contact: <sip:alice at 192.168.0.3:5070>
> Server: mjsip stack 1.6
> Content-Length: 135
> Content-Type: application/sdp
> 
> v=0
> o=- 817933771 817933775 IN IP4 10.10.2.6
> s=darkness
> c=IN IP4 192.168.0.3
> t=0 0
> m=audio 21000 RTP/AVP 0
> a=rtpmap:0 PCMU/8000
> 
> 
> 
> 
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-- 
Klaus Darilion
nic.at

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