[Serusers] Placing Call on Hold and reestablishing the call

Fri Apr 14 09:33:12 CEST 2006

Sorry, this email was suppose to go somewhere else . Could anybody 
delete it from the mailing list?
Thank you.

Ladislav Andel wrote:
> Ahoj,
> puvodne sem to chtel poslat do serdev, tak je to v anglictine.
> Mozna budes hnedka videt co se tam deje. Trochu to nechapu protoze
> o obou SIP UA se vi, ze jsou za NATem a tak jsem myslel, ze SIP zpravy 
> budou spravne posilany v SIP dialogu, ale neni to tak.
>
> Hello,
> I have been testing the CVS SER version and have come across one problem.
> Both clients are behind the same NAT and
> the call establishing is without problem.
> The problematic part starts when I place call on hold
> and then reestablish the call.
>
> The following SIP trace starts when one of my clients place call on 
> hold (sends INVITE with c= IN IP4 0.0.0.0 in SDP body.
>
> The last SIP message in this email SER forwards ACK to unreacheble IP 
> address(stated in R-URI) from public Internet.
>
> I don't know why this is happening since the establishing the call was 
> without problem
> and SER should know that both clients are behind NAT.
>
> Ladislav
>
> U 147.229.213.156:1033 -> 213.192.30.220:5060
> INVITE sip:ht at 147.229.213.156:5060 SIP/2.0.
> Via: SIP/2.0/UDP 192.168.1.100;branch=z9hG4bK1973DC21.
> CSeq: 3390 INVITE.
> To: <sip:ht at vandel.sip>;tag=fddf9b136ecebdf1.
> Content-Type: application/sdp.
> From: "ibook" <sip:ibook at vandel.sip>;tag=6383FDC1.
> Call-ID: 1898443428 at 192.168.1.100.
> Subject: sip:ibook at vandel.sip.
> Route: 
> <sip:213.192.30.220;ftag=6383FDC1;lr=on;avp=y44BAwBuYXQBAAAAEQMAbmF0AQAA>. 
>
> Content-Length: 215.
> User-Agent: kphone/4.2.
> Contact: "ibook" <sip:ibook at 192.168.1.100;transport=udp>.
> .
> v=0.
> o=username 0 0 IN IP4 0.0.0.0.
> s=Whoa there dewd.
> c=IN IP4 0.0.0.0.
> t=0 0.
> m=audio 0 RTP/AVP 0 97 8 3.
> a=rtpmap:0 PCMU/8000.
> a=rtpmap:3 GSM/8000.
> a=rtpmap:8 PCMA/8000.
> a=rtpmap:97 iLBC/8000.
> a=fmtp:97 mode=30.
>
> #
> U 213.192.30.220:5060 -> 147.229.213.156:1033
> SIP/2.0 100 trying -- your call is important to us.
> Via: SIP/2.0/UDP 
> 192.168.1.100;branch=z9hG4bK1973DC21;rport=1033;received=147.229.213.156.
> CSeq: 3390 INVITE.
> To: <sip:ht at vandel.sip>;tag=fddf9b136ecebdf1.
> From: "ibook" <sip:ibook at vandel.sip>;tag=6383FDC1.
> Call-ID: 1898443428 at 192.168.1.100.
> Server: Sip EXpress router (0.10.99-dev33 (i386/linux)).
> Content-Length: 0.
> Warning: 392 213.192.30.220:5060 "Noisy feedback tells:  pid=27480 
> req_src_ip=147.229.213.156 req_src_port=1033 
> in_uri=sip:ht at 147.229.213.156:5060 out_uri=sip:ht at 147.229.213.156:5060 
> via_cnt==1".
> .
>
> #
> U 213.192.30.220:5060 -> 147.229.213.156:5060
> INVITE sip:ht at 147.229.213.156:5060 SIP/2.0.
> Max-Forwards: 10.
> Record-Route: 
> <sip:213.192.30.220;ftag=6383FDC1;avp=PhwBAwBuYXQBAAAA;lr=on>.
> Via: SIP/2.0/UDP 213.192.30.220;branch=z9hG4bK1749.643f2377.0.
> Via: SIP/2.0/UDP 
> 192.168.1.100;rport=1033;received=147.229.213.156;branch=z9hG4bK1973DC21.
> CSeq: 3390 INVITE.
> To: <sip:ht at vandel.sip>;tag=fddf9b136ecebdf1.
> Content-Type: application/sdp.
> From: "ibook" <sip:ibook at vandel.sip>;tag=6383FDC1.
> Call-ID: 1898443428 at 192.168.1.100.
> Subject: sip:ibook at vandel.sip.
> Content-Length: 237.
> User-Agent: kphone/4.2.
> Contact: "ibook" <sip:ibook at 147.229.213.156:1033;transport=udp>.
> .
> v=0.
> o=username 0 0 IN IP4 0.0.0.0.
> s=Whoa there dewd.
> c=IN IP4 0.0.0.0.
> t=0 0.
> m=audio 35170 RTP/AVP 0 97 8 3.
> a=rtpmap:0 PCMU/8000.
> a=rtpmap:3 GSM/8000.
> a=rtpmap:8 PCMA/8000.
> a=rtpmap:97 iLBC/8000.
> a=fmtp:97 mode=30.
> a=nortpproxy:yes.
>
> #
> U 147.229.213.156:5060 -> 213.192.30.220:5060
> SIP/2.0 200 OK.
> Via: SIP/2.0/UDP 213.192.30.220;branch=z9hG4bK1749.643f2377.0.
> Via: SIP/2.0/UDP 
> 192.168.1.100;rport=1033;received=147.229.213.156;branch=z9hG4bK1973DC21.
> Record-Route: 
> <sip:213.192.30.220;ftag=6383FDC1;avp=PhwBAwBuYXQBAAAA;lr=on>.
> From: "ibook" <sip:ibook at vandel.sip>;tag=6383FDC1.
> To: <sip:ht at vandel.sip>;tag=fddf9b136ecebdf1.
> Call-ID: 1898443428 at 192.168.1.100.
> CSeq: 3390 INVITE.
> User-Agent: Grandstream HT286 1.0.6.7.
> Contact: <sip:ht at 192.168.1.102>.
> Allow: INVITE,ACK,CANCEL,BYE,NOTIFY,REFER,OPTIONS,INFO,SUBSCRIBE.
> Content-Type: application/sdp.
> Supported: replaces.
> Content-Length: 155.
> .
> v=0.
> o=ht 8000 8001 IN IP4 192.168.1.102.
> s=SIP Call.
> c=IN IP4 192.168.1.102.
> t=0 0.
> m=audio 5004 RTP/AVP 0.
> a=recvonly.
> a=rtpmap:0 PCMU/8000.
> a=ptime:20.
>
> #
> U 213.192.30.220:5060 -> 147.229.213.156:1033
> SIP/2.0 200 OK.
> Via: SIP/2.0/UDP 
> 192.168.1.100;rport=1033;received=147.229.213.156;branch=z9hG4bK1973DC21.
> Record-Route: 
> <sip:213.192.30.220;ftag=6383FDC1;avp=PhwBAwBuYXQBAAAA;lr=on>.
> From: "ibook" <sip:ibook at vandel.sip>;tag=6383FDC1.
> To: <sip:ht at vandel.sip>;tag=fddf9b136ecebdf1.
> Call-ID: 1898443428 at 192.168.1.100.
> CSeq: 3390 INVITE.
> User-Agent: Grandstream HT286 1.0.6.7.
> Contact: <sip:ht at 192.168.1.102>.
> Allow: INVITE,ACK,CANCEL,BYE,NOTIFY,REFER,OPTIONS,INFO,SUBSCRIBE.
> Content-Type: application/sdp.
> Supported: replaces.
> Content-Length: 175.
> .
> v=0.
> o=ht 8000 8001 IN IP4 192.168.1.102.
> s=SIP Call.
> c=IN IP4 213.192.30.220.
> t=0 0.
> m=audio 35172 RTP/AVP 0.
> a=recvonly.
> a=rtpmap:0 PCMU/8000.
> a=ptime:20.
> a=nortpproxy:yes.
>
> #
> U 147.229.213.156:1033 -> 213.192.30.220:5060
> ACK sip:ht at 192.168.1.102 SIP/2.0.
> Via: SIP/2.0/UDP 192.168.1.100;branch=z9hG4bK1973DC21.
> CSeq: 3390 ACK.
> To: <sip:ht at vandel.sip>;tag=fddf9b136ecebdf1.
> From: "ibook" <sip:ibook at vandel.sip>;tag=6383FDC1.
> Call-ID: 1898443428 at 192.168.1.100.
> Route: <sip:213.192.30.220;ftag=6383FDC1;lr=on;avp=PhwBAwBuYXQBAAAA>.
> Content-Length: 0.
> User-Agent: kphone/4.2.
> Contact: "ibook" <sip:ibook at 192.168.1.100;transport=udp>.
> .
>
> #
> U 213.192.30.220:5060 -> 192.168.1.102:5060
> ACK sip:ht at 192.168.1.102 SIP/2.0.
> Max-Forwards: 10.
> Record-Route: 
> <sip:213.192.30.220;ftag=6383FDC1;avp=PhwBAwBuYXQBAAAA;lr=on>.
> Via: SIP/2.0/UDP 213.192.30.220;branch=0.
> Via: SIP/2.0/UDP 
> 192.168.1.100;rport=1033;received=147.229.213.156;branch=z9hG4bK1973DC21.
> CSeq: 3390 ACK.
> To: <sip:ht at vandel.sip>;tag=fddf9b136ecebdf1.
> From: "ibook" <sip:ibook at vandel.sip>;tag=6383FDC1.
> Call-ID: 1898443428 at 192.168.1.100.
> Content-Length: 0.
> User-Agent: kphone/4.2.
> Contact: "ibook" <sip:ibook at 147.229.213.156:1033;transport=udp>.
>
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