[Freeswitch-users] Call Recovery when using TCP
Anthony McGarry
agtmcgarry at gmail.com
Tue Jul 23 19:31:13 MSD 2013
Thanks Brian,
Initially I though the same and looked for something to migrate the tcp session, tcpcp and sockmi, but no joy.
I was doing some more testing and noticed that if the B leg was TCP and the A leg UDP the call recovered.
So I though my earlier assumption about TCP connection dropping was wrong as it seems the B leg reestablishes the session on the recovering server.
The issue just seems to be the recovery of the A leg. FS always sends the A leg recovery INVITE as UDP. Even if original call was TCP. If I could force it to use TCP I believe it would recover the call.
Below is a call with A leg as UDP and B leg as TCP thats recovers fine.
2013-07-23 16:19:46.419717 [NOTICE] switch_channel.c:1030 New Channel sofia/private/+35319032109 at 198
2013-07-23 16:19:46.419717 [NOTICE] switch_channel.c:1028 Rename Channel sofia/private/+35319032109@
2013-07-23 16:19:46.419717 [NOTICE] switch_core_sqldb.c:2744 Resurrecting fallen channel sofia/priva
2013-07-23 16:19:46.439717 [NOTICE] switch_channel.c:1030 New Channel sofia/internal/0877857933 at 10.1
2013-07-23 16:19:46.439717 [NOTICE] switch_channel.c:1028 Rename Channel sofia/internal/0877857933 at 1
2013-07-23 16:19:46.439717 [NOTICE] switch_core_sqldb.c:2744 Resurrecting fallen channel sofia/inter
send 1110 bytes to udp/[10.101.23.203]:5060 at 15:19:46.459562:
------------------------------------------------------------------------
INVITE sip:0877857933 at 10.101.23.203:5060 SIP/2.0
Via: SIP/2.0/UDP 10.101.23.110;rport;branch=z9hG4bK3tjcc8KU636FS
Route: <sip:0877857933 at 10.101.23.203:5060;lr>
Max-Forwards: 70
From: <sip:ae019032109 at 10.101.23.110:5060>;tag=B8BUB47FmmerF
To: <sip:0877857933 at 10.101.23.203>;tag=95ffcd055e0f78f7d5d397020e89288dba056a96
Call-ID: 1054-453-6232013151830-IMG2_DEG-2-10.101.23.203
CSeq: 46960329 INVITE
Contact: <sip:0877857933 at 10.101.23.110:5060>
User-Agent: LAB - SBC
Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, REGISTER, REFER, NOTIFY
Supported: timer, precondition, path, replaces
Allow-Events: talk, hold, conference, refer
Privacy: none
Content-Type: application/sdp
Content-Disposition: session
Content-Length: 246
X-FS-Support: update_display,send_info
P-Asserted-Identity: "ae019032109" <sip:ae019032109 at 10.101.23.203>
v=0
o=FreeSWITCH 1374564092 1374564094 IN IP4 10.101.24.110
s=FreeSWITCH
c=IN IP4 10.101.24.110
t=0 0
m=audio 28694 RTP/AVP 8 101 13
a=rtpmap:8 PCMA/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-16
a=rtpmap:13 CN/8000
a=ptime:20
------------------------------------------------------------------------
recv 398 bytes from udp/[10.101.23.203]:5060 at 15:19:46.463116:
------------------------------------------------------------------------
SIP/2.0 100 Trying
Via: SIP/2.0/UDP 10.101.23.110;rport;branch=z9hG4bK3tjcc8KU636FS;received=10.101.23.110
Call-ID: 1054-453-6232013151830-IMG2_DEG-2-10.101.23.203
From: <sip:ae019032109 at 10.101.23.110:5060>;tag=B8BUB47FmmerF
To: <sip:0877857933 at 10.101.23.203>;tag=95ffcd055e0f78f7d5d397020e89288dba056a96
CSeq: 46960329 INVITE
Server: Dialogic-SIP/10.5.3.372 IMG2_DEG 2
Content-Length: 0
------------------------------------------------------------------------
recv 961 bytes from udp/[10.101.23.203]:5060 at 15:19:46.463966:
------------------------------------------------------------------------
SIP/2.0 200 OK
Via: SIP/2.0/UDP 10.101.23.110;rport;branch=z9hG4bK3tjcc8KU636FS;received=10.101.23.110
Call-ID: 1054-453-6232013151830-IMG2_DEG-2-10.101.23.203
From: <sip:ae019032109 at 10.101.23.110:5060>;tag=B8BUB47FmmerF
To: <sip:0877857933 at 10.101.23.203>;tag=95ffcd055e0f78f7d5d397020e89288dba056a96
Contact: <sip:0877857933 at 10.101.23.203:5060>
CSeq: 46960329 INVITE
Server: Dialogic-SIP/10.5.3.372 IMG2_DEG 2
Allow: INVITE, BYE, REGISTER, ACK, OPTIONS, CANCEL, SUBSCRIBE, NOTIFY, INFO, REFER, UPDATE
Supported: path, replaces, timer, tdialog
Require: timer
Session-Expires: 1800;refresher=uas
Accept: application/sdp, application/dtmf-relay, text/plain
Content-Type: application/sdp
Content-Length: 239
v=0
o=Dialogic_SDP 963778 1 IN IP4 10.101.23.203
s=Dialogic-SIP
c=IN IP4 10.101.24.203
t=0 0
m=audio 8332 RTP/AVP 8 101
a=rtpmap:8 PCMA/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
a=silenceSupp:off - - - -
a=ptime:20
------------------------------------------------------------------------
recv 961 bytes from udp/[10.101.23.203]:5060 at 15:19:47.101507:
------------------------------------------------------------------------
SIP/2.0 200 OK
Via: SIP/2.0/UDP 10.101.23.110;rport;branch=z9hG4bK3tjcc8KU636FS;received=10.101.23.110
Call-ID: 1054-453-6232013151830-IMG2_DEG-2-10.101.23.203
From: <sip:ae019032109 at 10.101.23.110:5060>;tag=B8BUB47FmmerF
To: <sip:0877857933 at 10.101.23.203>;tag=95ffcd055e0f78f7d5d397020e89288dba056a96
Contact: <sip:0877857933 at 10.101.23.203:5060>
CSeq: 46960329 INVITE
Server: Dialogic-SIP/10.5.3.372 IMG2_DEG 2
Allow: INVITE, BYE, REGISTER, ACK, OPTIONS, CANCEL, SUBSCRIBE, NOTIFY, INFO, REFER, UPDATE
Supported: path, replaces, timer, tdialog
Require: timer
Session-Expires: 1800;refresher=uas
Accept: application/sdp, application/dtmf-relay, text/plain
Content-Type: application/sdp
Content-Length: 239
v=0
o=Dialogic_SDP 963778 1 IN IP4 10.101.23.203
s=Dialogic-SIP
c=IN IP4 10.101.24.203
t=0 0
m=audio 8332 RTP/AVP 8 101
a=rtpmap:8 PCMA/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
a=silenceSupp:off - - - -
a=ptime:20
------------------------------------------------------------------------
recv 961 bytes from udp/[10.101.23.203]:5060 at 15:19:48.070746:
------------------------------------------------------------------------
SIP/2.0 200 OK
Via: SIP/2.0/UDP 10.101.23.110;rport;branch=z9hG4bK3tjcc8KU636FS;received=10.101.23.110
Call-ID: 1054-453-6232013151830-IMG2_DEG-2-10.101.23.203
From: <sip:ae019032109 at 10.101.23.110:5060>;tag=B8BUB47FmmerF
To: <sip:0877857933 at 10.101.23.203>;tag=95ffcd055e0f78f7d5d397020e89288dba056a96
Contact: <sip:0877857933 at 10.101.23.203:5060>
CSeq: 46960329 INVITE
Server: Dialogic-SIP/10.5.3.372 IMG2_DEG 2
Allow: INVITE, BYE, REGISTER, ACK, OPTIONS, CANCEL, SUBSCRIBE, NOTIFY, INFO, REFER, UPDATE
Supported: path, replaces, timer, tdialog
Require: timer
Session-Expires: 1800;refresher=uas
Accept: application/sdp, application/dtmf-relay, text/plain
Content-Type: application/sdp
Content-Length: 239
v=0
o=Dialogic_SDP 963778 1 IN IP4 10.101.23.203
s=Dialogic-SIP
c=IN IP4 10.101.24.203
t=0 0
m=audio 8332 RTP/AVP 8 101
a=rtpmap:8 PCMA/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
a=silenceSupp:off - - - -
a=ptime:20
------------------------------------------------------------------------
send 1175 bytes to tcp/[198.19.255.1]:5060 at 15:19:49.473346:
------------------------------------------------------------------------
INVITE sip:+35319032109 at 198.19.255.1:5060;transport=tcp SIP/2.0
Via: SIP/2.0/TCP 78.158.110.24;rport;branch=z9hG4bKBNF06yNpU187Q
Via: SIP/2.0/TCP 78.158.110.24;rport;branch=z9hG4bKZ21tSFUQvy38c
Max-Forwards: 69
From: "+353877857933" <sip:+353877857933 at 78.158.110.24>;tag=BK8QvjBeDHXtN
To: <sip:+35319032109 at 198.19.255.1;transport=tcp>;tag=397C7E04-26CA
Call-ID: f9547f1f-6e4d-1231-028b-001f290685a4
CSeq: 46960329 INVITE
Contact: <sip:+35319032109 at 78.158.110.24:5060;transport=tcp>
User-Agent: PlanNet21 Communications - SBC
Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, REGISTER, REFER, NOTIFY
Supported: timer, precondition, path, replaces
Allow-Events: talk, hold, conference, refer
Privacy: none
Content-Type: application/sdp
Content-Disposition: session
Content-Length: 246
X-FS-Support: update_display,send_info
P-Asserted-Identity: "+353877857933" <sip:+353877857933 at 78.158.110.24>
v=0
o=FreeSWITCH 1374569678 1374569680 IN IP4 78.158.110.24
s=FreeSWITCH
c=IN IP4 78.158.110.24
t=0 0
m=audio 23108 RTP/AVP 8 101 13
a=rtpmap:8 PCMA/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-16
a=rtpmap:13 CN/8000
a=ptime:20
------------------------------------------------------------------------
recv 484 bytes from tcp/[198.19.255.1]:5060 at 15:19:49.536636:
------------------------------------------------------------------------
SIP/2.0 100 Trying
Via: SIP/2.0/TCP 78.158.110.24;rport;branch=z9hG4bKBNF06yNpU187Q,SIP/2.0/TCP 78.158.110.24;rport;
From: "+353877857933" <sip:+353877857933 at 78.158.110.24>;tag=BK8QvjBeDHXtN
To: <sip:+35319032109 at 198.19.255.1;transport=tcp>;tag=397C7E04-26CA
Date: Tue, 23 Jul 2013 15:19:49 GMT
Call-ID: f9547f1f-6e4d-1231-028b-001f290685a4
CSeq: 46960329 INVITE
Allow-Events: telephone-event
Server: Cisco-SIPGateway/IOS-12.x
Content-Length: 0
------------------------------------------------------------------------
recv 1073 bytes from tcp/[198.19.255.1]:5060 at 15:19:49.601460:
------------------------------------------------------------------------
SIP/2.0 200 OK
Via: SIP/2.0/TCP 78.158.110.24;rport;branch=z9hG4bKBNF06yNpU187Q,SIP/2.0/TCP 78.158.110.24;rport;
From: "+353877857933" <sip:+353877857933 at 78.158.110.24>;tag=BK8QvjBeDHXtN
To: <sip:+35319032109 at 198.19.255.1;transport=tcp>;tag=397C7E04-26CA
Date: Tue, 23 Jul 2013 15:19:49 GMT
Call-ID: f9547f1f-6e4d-1231-028b-001f290685a4
CSeq: 46960329 INVITE
Allow: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK, UPDATE, REFER, SUBSCRIBE, NOTIFY, INFO, REGISTER
Allow-Events: telephone-event
Remote-Party-ID: "Ian McGrath" <sip:+1947 at 198.19.255.1>;party=called;screen=yes;privacy=off
Contact: <sip:+35319032109 at 198.19.255.1:5060;transport=tcp>
Supported: replaces
Supported: sdp-anat
Server: Cisco-SIPGateway/IOS-12.x
Supported: timer
Content-Type: application/sdp
Content-Length: 247
v=0
o=CiscoSystemsSIP-GW-UserAgent 3902 8614 IN IP4 198.19.255.1
s=SIP Call
c=IN IP4 198.19.255.1
t=0 0
m=audio 19050 RTP/AVP 8 101
c=IN IP4 198.19.255.1
a=rtpmap:8 PCMA/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-16
a=ptime:20
------------------------------------------------------------------------
send 440 bytes to tcp/[198.19.255.1]:5060 at 15:19:49.603288:
------------------------------------------------------------------------
ACK sip:+35319032109 at 198.19.255.1:5060;transport=tcp SIP/2.0
Via: SIP/2.0/TCP 78.158.110.24;rport;branch=z9hG4bKcy8r8S6SraZtK
Max-Forwards: 70
From: "+353877857933" <sip:+353877857933 at 78.158.110.24>;tag=BK8QvjBeDHXtN
To: <sip:+35319032109 at 198.19.255.1;transport=tcp>;tag=397C7E04-26CA
Call-ID: f9547f1f-6e4d-1231-028b-001f290685a4
CSeq: 46960329 ACK
Contact: <sip:+35319032109 at 78.158.110.24:5060;transport=tcp>
Content-Length: 0
------------------------------------------------------------------------
send 466 bytes to udp/[10.101.23.203]:5060 at 15:19:49.606747:
------------------------------------------------------------------------
ACK sip:0877857933 at 10.101.23.203:5060 SIP/2.0
Via: SIP/2.0/UDP 10.101.23.110;rport;branch=z9hG4bK43B5D34y3cX2m
Route: <sip:0877857933 at 10.101.23.203:5060;lr>
Max-Forwards: 70
From: <sip:ae019032109 at 10.101.23.110:5060>;tag=B8BUB47FmmerF
To: <sip:0877857933 at 10.101.23.203>;tag=95ffcd055e0f78f7d5d397020e89288dba056a96
Call-ID: 1054-453-6232013151830-IMG2_DEG-2-10.101.23.203
CSeq: 46960329 ACK
Contact: <sip:0877857933 at 10.101.23.110:5060>
Content-Length: 0
------------------------------------------------------------------------
On 23 Jul 2013, at 14:47, Brian West <brian at freeswitch.org> wrote:
> You can't do call recovery on TCP at the moment, You have no way to re-establish the TCP connections once FreeSWITCH goes down.
>
> /b
>
> Em Jul 23, 2013, às 8:01 AM, Anthony McGarry <agtmcgarry at gmail.com> escreveu:
>
>> Anyone using TCP in this scenario? Cannot find what I'm missing.
>
>
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