[Serusers] unwanted ACK forward

Thu Dec 21 11:48:02 CET 2006

The ACK for the 4xx reply must use exact the same values in the headers
as they was in the original INVITE (except CSeq), but you have:

I: Via: SIP/2.0/UDP 192.168.0.138:5061;branch=z9hG4bK-6353-1-0;rport.
A: Via: SIP/2.0/UDP 192.168.0.138:5061;branch=z9hG4bK-6353-1-4;rport.

and the Route header is missing in the ACK, which is also required.

See RFC3261, 17.1.1.3

Michal

On Thu, 2006-12-21 at 11:14 +0100, =?UTF-8?Q? tzieleniewski ?= wrote:
> Thanku for fast unswer!
> Sorry but I made copy/paste error:)
> 
> here is the correct grep:
> #
> U 2006/12/19 13:59:52.296438 192.168.0.138:5060 -> 192.168.0.74:5060
> INVITE sip:tzl at scscf.ims.touk.pl SIP/2.0.
> Via: SIP/2.0/UDP 192.168.0.138:5061;branch=z9hG4bK-6353-1-0;rport.
> Route: <sip:scscf.ims.touk.pl;lr>.
> Max-Forwards: 70.
> Contact: <sip:sippclient at 192.168.0.138:5061>.
> To: "tzl"<sip:tzl at scscf.ims.touk.pl>.
> From: "sippclient"<sip:sippclient at scscf.ims.touk.pl>;tag=1.
> Call-ID: 1-6353 at 192.168.0.138.
> CSeq: 1 INVITE.
> Subject: Performance Test.
> Content-Type: application/sdp.
> Content-Length:  137.
> .
> v=0.
> o=user1 53655765 2353687637 IN IP4 192.168.0.138.
> s=-.
> t=0 0.
> c=IN IP4 192.168.0.138.
> m=audio 6000 RTP/AVP 0.
> a=rtpmap:0 PCMU/8000.
> .
> 
> #
> U 2006/12/19 13:59:52.296960 192.168.0.74:5060 -> 192.168.0.138:5060
> SIP/2.0 407 Proxy Authentication Required.
> Via: SIP/2.0/UDP 192.168.0.138:5061;branch=z9hG4bK-6353-1-0;rport=5060.
> To: "tzl"<sip:tzl at scscf.ims.touk.pl>;tag=9463a2e9cf4445c72e97ac31aeb7f1ed.4ea0.
> From: "sippclient"<sip:sippclient at scscf.ims.touk.pl>;tag=1.
> Call-ID: 1-6353 at 192.168.0.138.
> CSeq: 1 INVITE.
> Proxy-Authenticate: Digest realm="scscf.ims.touk.pl", nonce="4587f18458a218340aa80d3f0cb5a4886fc200be".
> Server: Sip EXpress router (0.9.7-pre1 (x86_64/linux)).
> Content-Length: 0.
> Warning: 392 scscf.ims.touk.pl:5060 "Noisy feedback tells:  pid=5452 req_src_ip=192.168.0.138 req_src_port=5060 in_uri=sip:tzl at scscf.ims.touk.pl out_uri=sip:tzl at scscf.ims.touk.pl via_cnt==1".
> .
> 
> #
> U 2006/12/19 13:59:52.297775 192.168.0.138:5060 -> 192.168.0.74:5060
> ACK sip:tzl at scscf.ims.touk.pl SIP/2.0.
> Via: SIP/2.0/UDP 192.168.0.138:5061;branch=z9hG4bK-6353-1-4;rport.
> To: "tzl"<sip:tzl at scscf.ims.touk.pl>;tag=9463a2e9cf4445c72e97ac31aeb7f1ed.4ea0.
> From: "sippclient"<sip:sippclient at scscf.ims.touk.pl>;tag=1.
> Contact: <sip:sippclient at 192.168.0.138:5061>.
> Call-ID: 1-6353 at 192.168.0.138.
> CSeq: 1 ACK.
> Subject: Performance Test.
> Content-Length: 0.
> .
> 
> #
> U 2006/12/19 13:59:52.298207 192.168.0.74:5060 -> 192.168.0.138:7002
> ACK sip:tzl at 192.168.0.138:7002 SIP/2.0.
> Max-Forwards: 10.
> Record-Route: <sip:192.168.0.74;ftag=1;lr=on>.
> Via: SIP/2.0/UDP 192.168.0.74;branch=0.
> Via: SIP/2.0/UDP 192.168.0.138:5061;branch=z9hG4bK-6353-1-4;rport=5060.
> To: "tzl"<sip:tzl at scscf.ims.touk.pl>;tag=9463a2e9cf4445c72e97ac31aeb7f1ed.4ea0.
> From: "sippclient"<sip:sippclient at scscf.ims.touk.pl>;tag=1.
> Contact: <sip:sippclient at 192.168.0.138:5061>.
> Call-ID: 1-6353 at 192.168.0.138.
> CSeq: 1 ACK.
> Subject: Performance Test.
> Content-Length: 0.
> .
> 
> Bests
> Tomasz Zieleniewski
> 
> > There's nothing wrong in your scenario and I don't see ser forwarding 
> > the ACK to the uas. I see the uas sending the same ACK to ser twice with 
> > exactly the same timestamp  13:29:24.986124. Are you sure you for some 
> > reason haven't captured the same packet twice?
> > g-)
> > 
> > tzieleniewski wrote:
> > > Hi All!
> > >
> > > I was trying to write some test under sipp to test ser.
> > > My scenario was the following:
> > >          UA1         SIPProxy          UA2
> > >           |INVITE        |              |
> > >           |------------->|              |
> > >           |407           |              |
> > >           |<-------------|              |
> > >           |ACK           |              |
> > >           |------------->|              |
> > >           |INVITE        |              |
> > >           |------------->|              |
> > >           |TRYING        |              |
> > >           |<-------------|              |
> > >           |              |INVITE        |
> > >           |              |------------->|
> > >           |              |OK            |
> > >           |              |<-------------|
> > >           |OK            |              |
> > >           |<-------------|              |
> > >           |ACK           |              |
> > >           |------------->|              |
> > >           |              |ACK           |
> > >           |              |------------->|
> > > I have no idea why in case of sipp emulation ser forward the first ACK to the UAS wich is in my case x-lite under linux. ser ip is 192.168.0.74:)
> > >
> > > The ngrep from ser port is as follows:
> > > #
> > > U 2006/12/19 13:29:24.976872 192.168.0.138:5060 -> 192.168.0.74:5060
> > > INVITE sip:tzl at scscf.ims.touk.pl SIP/2.0.
> > > Via: SIP/2.0/UDP 192.168.0.138:5061;branch=z9hG4bK-6204-1-0;rport.
> > > Route: <sip:scscf.ims.touk.pl;lr>.
> > > Max-Forwards: 70.
> > > Contact: <sip:sippclient at 192.168.0.138:5061>.
> > > To: "tzl"<sip:tzl at scscf.ims.touk.pl>.
> > > From: "sippclient"<sip:sippclient at scscf.ims.touk.pl>;tag=1.
> > > Call-ID: 1-6204 at 127.0.0.1.
> > > CSeq: 1 INVITE.
> > > Subject: Performance Test.
> > > Content-Type: application/sdp.
> > > Content-Length:  133.
> > > .
> > > v=0.
> > > o=user1 53655765 2353687637 IN IP4 192.168.0.138.
> > > s=-.
> > > t=0 0.
> > > c=IN IP4 127.0.0.1.
> > > m=audio 6000 RTP/AVP 0.
> > > a=rtpmap:0 PCMU/8000.
> > >
> > > #
> > > U 2006/12/19 13:29:24.977525 192.168.0.74:5060 -> 192.168.0.138:5060
> > > SIP/2.0 407 Proxy Authentication Required.
> > > Via: SIP/2.0/UDP 192.168.0.138:5061;branch=z9hG4bK-6204-1-0;rport=5060.
> > > To: "tzl"<sip:tzl at scscf.ims.touk.pl>;tag=9463a2e9cf4445c72e97ac31aeb7f1ed.a61b.
> > > From: "sippclient"<sip:sippclient at scscf.ims.touk.pl>;tag=1.
> > > Call-ID: 1-6204 at 127.0.0.1.
> > > CSeq: 1 INVITE.
> > > Proxy-Authenticate: Digest realm="scscf.ims.touk.pl", nonce="4587ea6059d5f141fce33748a3560a1eb274d934".
> > > Server: Sip EXpress router (0.9.7-pre1 (x86_64/linux)).
> > > Content-Length: 0.
> > > Warning: 392 scscf.ims.touk.pl:5060 "Noisy feedback tells:  pid=5453 req_src_ip=192.168.0.138 req_src_port=5060 in_uri=sip:tzl at scscf.ims.touk.pl out_uri=sip:tzl at scscf.ims.touk.pl via_cnt==1".
> > > .
> > >
> > > #
> > > U 2006/12/19 13:29:24.986124 192.168.0.138:5060 -> 192.168.0.74:5060
> > > ACK sip:tzl at scscf.ims.touk.pl SIP/2.0.
> > > Via: SIP/2.0/UDP 192.168.0.138:5061;branch=z9hG4bK-6204-1-4;rport.
> > > To: "tzl"<sip:tzl at scscf.ims.touk.pl>;tag=9463a2e9cf4445c72e97ac31aeb7f1ed.a61b.
> > > From: "sippclient"<sip:sippclient at scscf.ims.touk.pl>;tag=1.
> > > Call-ID: 1-6204 at 127.0.0.1.
> > > CSeq: 1 ACK.
> > > Subject: Performance Test.
> > > Content-Length: 0.
> > > .
> > >
> > > #
> > > U 2006/12/19 13:29:24.986124 192.168.0.138:5060 -> 192.168.0.74:5060
> > > ACK sip:tzl at scscf.ims.touk.pl SIP/2.0.
> > > Via: SIP/2.0/UDP 192.168.0.138:5061;branch=z9hG4bK-6204-1-4;rport.
> > > To: "tzl"<sip:tzl at scscf.ims.touk.pl>;tag=9463a2e9cf4445c72e97ac31aeb7f1ed.a61b.
> > > From: "sippclient"<sip:sippclient at scscf.ims.touk.pl>;tag=1.
> > > Call-ID: 1-6204 at 127.0.0.1.
> > > CSeq: 1 ACK.
> > > Subject: Performance Test.
> > > Content-Length: 0.
> > > .
> > >
> > > there is olso one thing more when I used x-lite instead of the sipp as uac ser did't forward the ACK.
> > >
> > > Please help me with this one.
> > > Bests tomek
> > > _______________________________________________
> > > Serusers mailing list
> > > Serusers at lists.iptel.org
> > > http://lists.iptel.org/mailman/listinfo/serusers
> > >
> > >
> > >   
> 
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