[SR-Users] Re-invite problems with t.38?
Klaus Darilion
klaus.mailinglists at pernau.at
Tue Apr 20 10:52:40 CEST 2010
Hi Espen, can you provide the traces with proper line break?
E.g. I always use
"ngrep -W byline -t -q -P "" any-pattery port 5060"
regards
klaus
Am 17.04.2010 21:39, schrieb Espen Berg:
> Den 15.04.2010 13:27, skrev Klaus Darilion:
>
>>> How would you have written it?
>>
>> I prefer this logic:
>>
>> ...
>> if (loose_route()) {
>> if (!has_totag()) {
>> xlog("L_WARN","$ci loose_route request without to-tag, 403...\n");
>> sl_send_reply("403", "out-of-dialog loose_route not allowed");
>> exit;
>> }
>> ... loose..route..processing
>> ... NAT traversal...rtpproxy....
>> t_relay();
>> }
>> ...
>> initial call setup ...
>> ...
>
> Nice :)
>
>
>>>> Trace the scenario with ngrep and take a look at the SDPs if they are
>>>> rewritten properly.
>>>
>>> I'm not able to spot any errors, the only error I'm able to see is that
>>> it seems to work one way.
>>>
>>> If A sends a fax to B
>>>
>>> This works with T.38:
>>> asterisk A <-> sipprovider <-> our trunk <-> kamailio/rtpp <-> asterisk
>>> <-> asterisk B (our asterisk)
>>>
>>> This fails with T.38, but works with G.711:
>>> asterisk B -> asterisk -> kamailio/rtpp -> our trunk -> asterisk ->
>>> asterisk A
>>>
>>> Could also be an Asterisk (A: 1.6.2.5/tested with 1.6.2.7rc, B: 1.6.2.6)
>>> or FFA bug. But if I try to send the FAX directly via SIP from A <-> B
>>> without the proxy everything works OK, so therefore I believe the
>>> problem are related to my kamailio configuration.
>>
>> Post the ngrep dump of the 2 different processes.
>
> I have been debugging this problem little bit more. The re-invite test
> showed precisely the same with x-lite on hold as
> with t.38 re-invite.
>
> If I call out and place a call on hold, I'm able to continue the call
> for about 20 seconds until the call was aborted. If
> I call into the same extension there are no problems to continue the
> call after "on hold". So just as the fax, the problem
> only occurs for outgoing calls, not inbound. I also tested with a
> cellular phone, just to eliminate the other end.
>
> Here are some ncat captures of the t.38 scenario that fails.
>
>
>
> ASTERISK B:
>
> #############################################################################################################################$
>
> U PUBLIC-IP-TO-PROXY:5060 -> IP-TO-ASTERISK:5060
> INVITE sip:FAXNUMBER at IP-TO-ASTERISK:5060 SIP/2.0..Via: SIP/2.0/UDP
> PUBLIC-IP-TO-PROXY;branch=z9hG4bK61a.7e6809b3.0..Vi
> a: SIP/2.0/UDP
> IP-TO-SONUS-TRUNK:5060;branch=z9hG4bK02B5afc10d34f983f6e..From:
> <sip:SENDTONUMBER at PUBLIC-IP-TO-PROXY>;tag=gK02b1
> 6fe7..To: "FAX"
> <sip:FAXNUMBER at PUBLIC-IP-TO-PROXY>;tag=as56fa57a3..Call-ID:
> 15180894487146a33b3f3bac366bc0bb at PUBLIC-IP-TO-PROXY
> ..CSeq: 17055 INVITE..Max-Forwards: 70..Allow:
> INVITE,ACK,CANCEL,BYE,REFER,INFO,SUBSCRIBE,NOTIFY,PRACK,UPDAT
> E,OPTIONS,MESSAGE,PUBLISH..Accept: application/sdp, application/isup,
> application/dtmf, application/dtmf-relay,
> multipart/mixed..Contact:
> <sip:SENDTONUMBER at IP-TO-SONUS-TRUNK:5060>..Supported:
> timer..Session-Expires: 1800;refresher=uas.
> .Min-SE: 90..Content-Length: 323..Content-Disposition: session;
> handling=required..Content-Type: application/sdp
> ....v=0..o=Sonus_UAC 23586 20272 IN IP4 IP-TO-SONUS-TRUNK..s=SIP Media
> Capabilities..c=IN IP4 PUBLIC-IP-TO-PROXY..t=0 0..m=
> image 35298 udptl
> t38..a=T38FaxVersion:0..a=T38MaxBitRate:14400..a=T38FaxRateManagement:transferredTCF..a=T38FaxM
>
>
> axBuffer:262..a=T38FaxMaxDatagram:176..a=T38FaxUdpEC:t38UDPRedundancy..a=sendrecv..a=nortpproxy:yes..
>
> ###
> U IP-TO-ASTERISK:5060 -> PUBLIC-IP-TO-PROXY:5060
> SIP/2.0 200 OK..Via: SIP/2.0/UDP
> PUBLIC-IP-TO-PROXY;branch=z9hG4bK61a.7e6809b3.0;received=PUBLIC-IP-TO-PROXY..Via:
> SIP/2.
> 0/UDP IP-TO-SONUS-TRUNK:5060;branch=z9hG4bK02B5afc10d34f983f6e..From:
> <sip:SENDTONUMBER at PUBLIC-IP-TO-PROXY>;tag=gK02b16fe7..To:
> "FAX" <sip:FAXNUMBER at PUBLIC-IP-TO-PROXY>;tag=as56fa57a3..Call-ID:
> 15180894487146a33b3f3bac366bc0bb at PUBLIC-IP-TO-PROXY..CS
> eq: 17055 INVITE..Server: Asterisk PBX 1.6.2.6..Allow: INVITE, ACK,
> CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIF
> Y, INFO..Supported: replaces, timer..Require: timer..Session-Expires:
> 1800;refresher=uas..Contact: <sip:FAXNUMBER@
> IP-TO-ASTERISK>..Content-Type: application/sdp..Content-Length:
> 276....v=0..o=root 1138957066 1138957067 IN IP4 IP-TO-ASTERISK
> ..s=Asterisk PBX 1.6.2.6..c=IN IP4 IP-TO-ASTERISK..t=0 0..m=image 4400
> udptl t38..a=T38FaxVersion:0.
>
> .a=T38MaxBitRate:14400..a=T38FaxRateManagement:transferredTCF..a=T38FaxMaxDatagram:1400..a=T38FaxUdpEC:t38UDPRedu
>
> ndancy..
> #############################################################################################################################$
>
>
> KAMAILIO PROXY ETH0:
>
>
> U PUBLIC-IP-TO-PROXY:5060 -> IP-TO-ASTERISK:5060
> INVITE sip:FAXNUMBER at IP-TO-ASTERISK:5060 SIP/2.0..Via: SIP/2.0/UDP
> PUBLIC-IP-TO-PROXY;branch=z9hG4bK6d41.d083efb2.0..Via: SIP/2.0/UDP
> IP-TO-SONUS-TRUNK:5060;branch=z9hG4bK02B44d12570046e38f1..From:
> <sip:SENDTONUMBER at PUBLIC-IP-TO-PROXY>;tag=gK02ec0fad.
> .To: "FAX" <sip:FAXNUMBER at PUBLIC-IP-TO-PROXY>;tag=as6196c897..Call-ID:
> 58b69aef10209bf30e38c5371ebb29cf at PUBLIC-IP-TO-PROXY..CSeq: 15775
> INVITE..Max-Forwards: 70..Allow:
> INVITE,ACK,CANCEL,BYE,REFER,INFO,SUBSCRIBE,NOTIFY,PRACK,UPDATE,OPTIONS,M
> ESSAGE,PUBLISH..Accept: application/sdp, application/isup,
> application/dtmf, application/dtmf-relay, multipart/mixed..Contact:
> <sip:SENDTONUMBER at IP-TO-SONUS-TRUNK:5060>..Supported:
> timer..Session-Expires: 1800;refresher=uas..Min-SE: 90..Cont
> ent-Length: 322..Content-Disposition: session;
> handling=required..Content-Type: application/sdp....v=0..o=Sonus_UAC
> 9775 15421 IN IP4 IP-TO-SONUS-TRUNK..s=SIP Media Capabilities..c=IN IP4
> PUBLIC-IP-TO-PROXY..t=0 0..m=image 35292 udptl t38..a
>
> =T38FaxVersion:0..a=T38MaxBitRate:14400..a=T38FaxRateManagement:transferredTCF..a=T38FaxMaxBuffer:262..a=T38FaxMaxDatagram:176..a=T38FaxUdpEC:t38UDPRedundancy..a=sendrecv..a=nortpproxy:yes..
>
> ###
> U IP-TO-ASTERISK:5060 -> PUBLIC-IP-TO-PROXY:5060
> SIP/2.0 200 OK..Via: SIP/2.0/UDP
> PUBLIC-IP-TO-PROXY;branch=z9hG4bK6d41.d083efb2.0;received=PUBLIC-IP-TO-PROXY..Via:
> SIP/2.0/UDP
> IP-TO-SONUS-TRUNK:5060;branch=z9hG4bK02B44d12570046e38f1..From:
> <sip:SENDTONUMBER at PUBLIC-IP-TO-PROXY>;tag=gK02ec0fad..To: "FAX
> " <sip:FAXNUMBER at PUBLIC-IP-TO-PROXY>;tag=as6196c897..Call-ID:
> 58b69aef10209bf30e38c5371ebb29cf at PUBLIC-IP-TO-PROXY..CSeq: 15775
> INVITE..Server: Asterisk PBX 1.6.2.6..Allow: INVITE, ACK, CANCEL,
> OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO..Su
> pported: replaces, timer..Require: timer..Session-Expires:
> 1800;refresher=uas..Contact:
> <sip:FAXNUMBER at IP-TO-ASTERISK>..Content-Type:
> application/sdp..Content-Length: 276....v=0..o=root 1675681328
> 1675681329 IN IP4 IP-TO-ASTERISK..s=
> Asterisk PBX 1.6.2.6..c=IN IP4 IP-TO-ASTERISK..t=0 0..m=image 4852 udptl
> t38..a=T38FaxVersion:0..a=T38MaxBitRate:14400..a=T38FaxRateManagement:transferredTCF..a=T38FaxMaxDatagram:1400..a=T38FaxUdpEC:t38UDPRedundancy..
>
>
>
> KAMAILIO PROXY ETH1:
>
>
> U IP-TO-SONUS-TRUNK:5060 -> LOCAL-IP-TO-PROXY:5060
> INVITE sip:FAXNUMBER at IP-TO-ASTERISK:5060 SIP/2.0..Via: SIP/2.0/UDP
> IP-TO-SONUS-TRUNK:5060;branch=z9hG4bK02B48cc1116e608d4ed..From:
> <sip:SENDTONUMBER at PUBLIC-IP-TO-PROXY>;tag=gK02f86d27..To: "FAX"
> <sip:FAXNUMBER at PUBLIC-IP-TO-PROXY>;tag=as279d4a05..Call-I
> D: 101766785455b9020d350d300cb15082 at PUBLIC-IP-TO-PROXY..CSeq: 24873
> INVITE..Max-Forwards: 70..Allow:
> INVITE,ACK,CANCEL,BYE,REFER,INFO,SUBSCRIBE,NOTIFY,PRACK,UPDATE,OPTIONS,MESSAGE,PUBLISH..Accept:
> application/sdp, application/isup, appl
> ication/dtmf, application/dtmf-relay, multipart/mixed..Contact:
> <sip:SENDTONUMBER at IP-TO-SONUS-TRUNK:5060>..Route:
> <sip:LOCAL-IP-TO-PROXY:5060;r2=on;lr;ftag=as279d4a05>..Route:
> <sip:PUBLIC-IP-TO-PROXY:5060;r2=on;lr;ftag=as279d4a05>..Supported: timer..
> Session-Expires: 1800;refresher=uas..Min-SE: 90..Content-Length:
> 301..Content-Disposition: session; handling=required..Content-Type:
> application/sdp....v=0..o=Sonus_UAC 18853 20363 IN IP4
> IP-TO-SONUS-TRUNK..s=SIP Media Capabilities..c=IN
> IP4 RTP-IP-TO-SONUSTRUNK..t=0 0..m=image 7994 udptl
> t38..a=T38FaxVersion:0..a=T38MaxBitRate:14400..a=T38FaxRateManagement:transferredTCF..a=T38FaxMaxBuffer:262..a=T38FaxMaxDatagram:176..a=T38FaxUdpEC:t38UDPRedundancy..a=sendrecv..
>
> ####
> U LOCAL-IP-TO-PROXY:5060 -> IP-TO-SONUS-TRUNK:5060
> SIP/2.0 200 OK..Via: SIP/2.0/UDP
> IP-TO-SONUS-TRUNK:5060;branch=z9hG4bK02B48cc1116e608d4ed..From:
> <sip:SENDTONUMBER at PUBLIC-IP-TO-PROXY>;tag=gK02f86d27..To: "FAX"
> <sip:FAXNUMBER at PUBLIC-IP-TO-PROXY>;tag=as279d4a05..Call-ID:
> 101766785455b9020d350d300cb150
> 82 at PUBLIC-IP-TO-PROXY..CSeq: 24873 INVITE..Server: Asterisk PBX
> 1.6.2.6..Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE,
> NOTIFY, INFO..Supported: replaces, timer..Require:
> timer..Session-Expires: 1800;refresher=uas..Contact:
> <sip:FAXNUMBER at IP-TO-ASTERISK>..Content-Type:
> application/sdp..Content-Length: 293....v=0..o=root 1135418376
> 1135418377 IN IP4 IP-TO-ASTERISK..s=Asterisk PBX 1.6.2.6..c=IN IP4
> LOCAL-IP-TO-PROXY..t=0 0..m=image 35324 udptl t38..a=T38FaxVe
>
> rsion:0..a=T38MaxBitRate:14400..a=T38FaxRateManagement:transferredTCF..a=T38FaxMaxDatagram:1400..a=T38FaxUdpEC:t38UDPRedundancy..a=nortpproxy:yes..
>
>
>
>
> U IP-TO-SONUS-TRUNK:5060 -> LOCAL-IP-TO-PROXY:5060
> INVITE sip:FAXNUMBER at IP-TO-ASTERISK:5060 SIP/2.0..Via: SIP/2.0/UDP
> IP-TO-SONUS-TRUNK:5060;branch=z9hG4bK02B48cc1116e608d4ed..From:
> <sip:SENDTONUMBER at PUBLIC-IP-TO-PROXY>;tag=gK02f86d27..To: "FAX"
> <sip:FAXNUMBER at PUBLIC-IP-TO-PROXY>;tag=as279d4a05..Call-I
> D: 101766785455b9020d350d300cb15082 at PUBLIC-IP-TO-PROXY..CSeq: 24873
> INVITE..Max-Forwards: 70..Allow:
> INVITE,ACK,CANCEL,BYE,REFER,INFO,SUBSCRIBE,NOTIFY,PRACK,UPDATE,OPTIONS,MESSAGE,PUBLISH..Accept:
> application/sdp, application/isup, appl
> ication/dtmf, application/dtmf-relay, multipart/mixed..Contact:
> <sip:SENDTONUMBER at IP-TO-SONUS-TRUNK:5060>..Route:
> <sip:LOCAL-IP-TO-PROXY:5060;r2=on;lr;ftag=as279d4a05>..Route:
> <sip:PUBLIC-IP-TO-PROXY:5060;r2=on;lr;ftag=as279d4a05>..Supported: timer..
> Session-Expires: 1800;refresher=uas..Min-SE: 90..Content-Length:
> 301..Content-Disposition: session; handling=required..Content-Type:
> application/sdp....v=0..o=Sonus_UAC 18853 20363 IN IP4
> IP-TO-SONUS-TRUNK..s=SIP Media Capabilities..c=IN
> IP4 RTP-IP-TO-SONUSTRUNK..t=0 0..m=image 7994 udptl
> t38..a=T38FaxVersion:0..a=T38MaxBitRate:14400..a=T38FaxRateManagement:transferredTCF..a=T38FaxMaxBuffer:262..a=T38FaxMaxDatagram:176..a=T38FaxUdpEC:t38UDPRedundancy..a=sendrecv..
>
> ####
> U LOCAL-IP-TO-PROXY:5060 -> IP-TO-SONUS-TRUNK:5060
> SIP/2.0 200 OK..Via: SIP/2.0/UDP
> IP-TO-SONUS-TRUNK:5060;branch=z9hG4bK02B48cc1116e608d4ed..From:
> <sip:SENDTONUMBER at PUBLIC-IP-TO-PROXY>;tag=gK02f86d27..To: "FAX"
> <sip:FAXNUMBER at PUBLIC-IP-TO-PROXY>;tag=as279d4a05..Call-ID:
> 101766785455b9020d350d300cb150
> 82 at PUBLIC-IP-TO-PROXY..CSeq: 24873 INVITE..Server: Asterisk PBX
> 1.6.2.6..Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE,
> NOTIFY, INFO..Supported: replaces, timer..Require:
> timer..Session-Expires: 1800;refresher=uas..Contact:
> <sip:FAXNUMBER at IP-TO-ASTERISK>..Content-Type:
> application/sdp..Content-Length: 293....v=0..o=root 1135418376
> 1135418377 IN IP4 IP-TO-ASTERISK..s=Asterisk PBX 1.6.2.6..c=IN IP4
> LOCAL-IP-TO-PROXY..t=0 0..m=image 35324 udptl t38..a=T38FaxVe
>
> rsion:0..a=T38MaxBitRate:14400..a=T38FaxRateManagement:transferredTCF..a=T38FaxMaxDatagram:1400..a=T38FaxUdpEC:t38UDPRedundancy..a=nortpproxy:yes..
>
>
>
> ASTERISK A:
> (REMOTE TESTSITE CONNECTED TO PHONZO, ONE PROVIDER KNOWN TO PROVIDE
> FUNCTIONING T.38 SERVICES)
>
> ########################
> U ASTERISK-TESTSITE-IP:5060 -> 80.232.37.178:5060
> INVITE sip:80.232.37.178:5061 SIP/2.0..Via: SIP/2.0/UDP
> 85.165.146.221:5060;branch=z9hG4bK7726391b;rport..Route: <sip:80.232.37
> .178;ftag=b1ae9fe1eb7f13837782c9061d653c57;lr>..Max-Forwards: 70..From:
> <sip:47SENDTONUMBER at 80.232.37.178>;tag=as61e4a63c..To: 6970
> 8347
> <sip:FAXNUMBER at 80.232.37.178>;tag=b1ae9fe1eb7f13837782c9061d653c57..Contact:
> <sip:SENDTONUMBER at 85.165.146.221>..Call-ID: 3D1965
> 63-47C711DF-AC2A9E0C-AB1DB137 at 80.232.37.179..CSeq: 102
> INVITE..User-Agent: none..Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFE
> R, SUBSCRIBE, NOTIFY, INFO..Supported: replaces, timer..Content-Type:
> application/sdp..Content-Length: 268....v=0..o=root 10588
> 12562 1058812563 IN IP4 85.165.146.221..s=Asterisk PBX 1.6.2.5..c=IN IP4
> 85.165.146.221..t=0 0..m=image 4810 udptl t38..a=T38Fa
>
> xVersion:0..a=T38MaxBitRate:14400..a=T38FaxRateManagement:transferredTCF..a=T38FaxMaxDatagram:849..a=T38FaxUdpEC:t38UDPFEC..
>
> ######
> U 80.232.37.178:5060 -> ASTERISK-TESTSITE-IP:5060
> SIP/2.0 200 OK..Via: SIP/2.0/UDP
> 85.165.146.221:5060;branch=z9hG4bK7726391b;rport=5060..Record-Route:
> <sip:80.232.37.178;ftag=a
> s61e4a63c;lr>..From:
> <sip:47SENDTONUMBER at 80.232.37.178>;tag=as61e4a63c..To: FAXNUMBER
> <sip:FAXNUMBER at 80.232.37.178>;tag=b1ae9fe1eb7f1
> 3837782c9061d653c57..Call-ID:
> 3D196563-47C711DF-AC2A9E0C-AB1DB137 at 80.232.37.179..CSeq: 102
> INVITE..Server: Sippy..Contact: Anon
> ymous <sip:80.232.37.178:5061>..Content-Length: 220..Content-Type:
> application/sdp....v=0..o=Sippy 144528972 1 IN IP4 80.232.37
> .178..s=SIP Call..t=0 0..m=image 17772 udptl t38..c=IN IP4
> 80.232.37.179..a=T38FaxVersion:0..a=T38MaxBitRate:14400..a=T38FaxRat
> eManagement:transferredTCF..a=T38FaxMaxDatagram:72..
>
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