[SR-Users] Blind Transfer WS Error

[Alessio Miranda]

Hi,

I have a problem with the blind transfer via WebSocket,
debugging from the browser we see that in some cases when the REFER is
done and the sip message "202 Accepted" arrives,
the message "180 Ringing" arrives first and then the "100 Trying"
and the transfer goes in error with "500 JsSIP Internal Error"

I have an architecture with Kamailio in frontend and asterisk in backend
on the same network, the sip dialogue between FE and BE is in SIP / UDP.
The WebRTC client connects to WebSocket at Kamailio's public address.

We have verified that the sip messages exchanged between kamailio and
asterisk are always correct.

Kamailio Ver. 4.4.4
Asterisk Ver. 13.18.3
PJSIP Ver. 2.6
JSSIP Ver. 3.2.2

Thanks
Alessio
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REFER sip:asterisk at 192.168.33.172:5160 SIP/2.0
Route: <sip:192.168.33.171:4443;transport=ws;r2=on;lr;did=491.6871>
Route: <sip:192.168.33.171:5068;r2=on;lr;did=491.6871>
Via: SIP/2.0/WSS tq3hhtsci9bi.invalid;branch=z9hG4bK4056005
Max-Forwards: 69
To: <sip:501 at 192.168.33.172>;tag=4a0f97f0-d80c-4409-b23c-f067c5dc8957
From: <sip:6iq6p1ps at 192.168.33.171>;tag=44egpqrkm1
Call-ID: 44dc493b-e192-4f6d-952b-2b992d0957af
CSeq: 2663 REFER
Refer-To: <sip:3003 at 192.168.33.171:4443>
Allow: INVITE,ACK,CANCEL,BYE,UPDATE,MESSAGE,OPTIONS,REFER,INFO
Supported: outbound
User-Agent: JsSIP 3.2.2
Content-Length: 0

SIP/2.0 202 Accepted
Via: SIP/2.0/WSS tq3hhtsci9bi.invalid;rport=2411;received=192.168.33.222;branch=z9hG4bK4056005
Call-ID: 44dc493b-e192-4f6d-952b-2b992d0957af
From: <sip:6iq6p1ps at 192.168.33.171>;tag=44egpqrkm1
To: <sip:501 at 192.168.33.172>;tag=4a0f97f0-d80c-4409-b23c-f067c5dc8957
CSeq: 2663 REFER
Expires: 600
Contact: <sip:asterisk at 192.168.33.172:5160>
Allow: OPTIONS, SUBSCRIBE, NOTIFY, PUBLISH, INVITE, ACK, BYE, CANCEL, UPDATE, PRACK, REGISTER, REFER, MESSAGE
Supported: 100rel, timer, replaces, norefersub
Server: FPBX-14.0.1.20(13.15.1)
Content-Length:  0


NOTIFY sip:6iq6p1ps at tq3hhtsci9bi.invalid;transport=ws SIP/2.0
Via: SIP/2.0/WSS 192.168.33.171:4443;branch=z9hG4bK7001.66cd2ec915ed5f2832f86583c1d95ce0.0
Via: SIP/2.0/UDP 192.168.33.172:5160;received=192.168.33.172;rport=5160;branch=z9hG4bKPj1dc8ebd4-fb71-42de-a893-774fdddb4795
From: "501" <sip:501 at 192.168.33.172>;tag=4a0f97f0-d80c-4409-b23c-f067c5dc8957
To: <sip:6iq6p1ps at 192.168.33.171>;tag=44egpqrkm1
Contact: <sip:asterisk at 192.168.33.172:5160>
Call-ID: 44dc493b-e192-4f6d-952b-2b992d0957af
CSeq: 6804 NOTIFY
Event: refer
Subscription-State: active;expires=599
Allow-Events: message-summary, presence, dialog, refer
Max-Forwards: 69
User-Agent: FPBX-14.0.1.20(13.15.1)
Content-Type: message/sipfrag;version=2.0
Content-Length:    21

SIP/2.0 180 Ringing


SIP/2.0 200 OK
Via: SIP/2.0/WSS 192.168.33.171:4443;branch=z9hG4bK7001.66cd2ec915ed5f2832f86583c1d95ce0.0
Via: SIP/2.0/UDP 192.168.33.172:5160;received=192.168.33.172;rport=5160;branch=z9hG4bKPj1dc8ebd4-fb71-42de-a893-774fdddb4795
To: <sip:6iq6p1ps at 192.168.33.171>;tag=44egpqrkm1
From: "501" <sip:501 at 192.168.33.172>;tag=4a0f97f0-d80c-4409-b23c-f067c5dc8957
Call-ID: 44dc493b-e192-4f6d-952b-2b992d0957af
CSeq: 6804 NOTIFY
Supported: outbound
Content-Length: 0

NOTIFY sip:6iq6p1ps at tq3hhtsci9bi.invalid;transport=ws SIP/2.0
Via: SIP/2.0/WSS 192.168.33.171:4443;branch=z9hG4bKa001.ed76da8343c72914f2b6511b4e25ba73.0
Via: SIP/2.0/UDP 192.168.33.172:5160;received=192.168.33.172;rport=5160;branch=z9hG4bKPjc79863a7-a074-45c6-ae30-3201695c006a
From: "501" <sip:501 at 192.168.33.172>;tag=4a0f97f0-d80c-4409-b23c-f067c5dc8957
To: <sip:6iq6p1ps at 192.168.33.171>;tag=44egpqrkm1
Contact: <sip:asterisk at 192.168.33.172:5160>
Call-ID: 44dc493b-e192-4f6d-952b-2b992d0957af
CSeq: 6803 NOTIFY
Event: refer
Subscription-State: active;expires=599
Allow-Events: message-summary, presence, dialog, refer
Max-Forwards: 69
User-Agent: FPBX-14.0.1.20(13.15.1)
Content-Type: message/sipfrag;version=2.0
Content-Length:    20

SIP/2.0 100 Trying


SIP/2.0 500 JsSIP Internal Error
Via: SIP/2.0/WSS 192.168.33.171:4443;branch=z9hG4bKa001.ed76da8343c72914f2b6511b4e25ba73.0
Via: SIP/2.0/UDP 192.168.33.172:5160;received=192.168.33.172;rport=5160;branch=z9hG4bKPjc79863a7-a074-45c6-ae30-3201695c006a
To: <sip:6iq6p1ps at 192.168.33.171>;tag=44egpqrkm1
From: "501" <sip:501 at 192.168.33.172>;tag=4a0f97f0-d80c-4409-b23c-f067c5dc8957
Call-ID: 44dc493b-e192-4f6d-952b-2b992d0957af
CSeq: 6803 NOTIFY
Supported: outbound
Content-Length: 0


NOTIFY sip:6iq6p1ps at tq3hhtsci9bi.invalid;transport=ws SIP/2.0
Via: SIP/2.0/WSS 192.168.33.171:4443;branch=z9hG4bK8001.d32ab96b07907079919c2b1378988d87.0
Via: SIP/2.0/UDP 192.168.33.172:5160;received=192.168.33.172;rport=5160;branch=z9hG4bKPj7534dbc0-c393-46ad-97f2-f98dba95d51c
From: "501" <sip:501 at 192.168.33.172>;tag=4a0f97f0-d80c-4409-b23c-f067c5dc8957
To: <sip:6iq6p1ps at 192.168.33.171>;tag=44egpqrkm1
Contact: <sip:asterisk at 192.168.33.172:5160>
Call-ID: 44dc493b-e192-4f6d-952b-2b992d0957af
CSeq: 6805 NOTIFY
Event: refer
Subscription-State: active;expires=599
Allow-Events: message-summary, presence, dialog, refer
Max-Forwards: 69
User-Agent: FPBX-14.0.1.20(13.15.1)
Content-Type: message/sipfrag;version=2.0
Content-Length:    21

SIP/2.0 180 Ringing


SIP/2.0 200 OK
Via: SIP/2.0/WSS 192.168.33.171:4443;branch=z9hG4bK8001.d32ab96b07907079919c2b1378988d87.0
Via: SIP/2.0/UDP 192.168.33.172:5160;received=192.168.33.172;rport=5160;branch=z9hG4bKPj7534dbc0-c393-46ad-97f2-f98dba95d51c
To: <sip:6iq6p1ps at 192.168.33.171>;tag=44egpqrkm1
From: "501" <sip:501 at 192.168.33.172>;tag=4a0f97f0-d80c-4409-b23c-f067c5dc8957
Call-ID: 44dc493b-e192-4f6d-952b-2b992d0957af
CSeq: 6805 NOTIFY
Supported: outbound
Content-Length: 0