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#161 SIPP responds with incorrect CSEQin ACK to retried SIP responses

v3.3
open
nobody
CSEQ (1) ACK (1) retry (1)
5
2019-06-26
2019-06-26
Brendan ONeill
No

I have experienced an issue with the sipp responding to SIP retries.

In the following example the ACK (2019-06-27 07:56:02.498818) was not recieved by the remote SBC(ie.it dropped in network.
As a result SBC retransmits the 401 response with cseq 1, in the meantime however sipp has continued its scenario with an incremented cseq. When the retried 401 (cseq 1)is recieved by sipp the ACK response generated contains the incremented cseq rather than CSEQ 1. Thus never

/opt/sipp-3.5.1/logs/19-06-27/DOT-Clust3-VIC-0388883030_TO_DOT-Clust3-QLD-0753527629_VIA_vic1_TC_Xpk2iKE5_19-06-27_07-56-00_messages.log
----------------------------------------------- 2019-06-27 07:56:02.483187
UDP message sent (721 bytes):

INVITE sip:0753527629@nipt.telstra.com:5060 SIP/2.0
Via: SIP/2.0/UDP 192.168.15.138:55073;branch=z9hG4bK-10487-1-1
From: "0388883030" sip:p0388883030@nipt.telstra.com;tag=1
To: "0753527629" sip:0753527629@nipt.telstra.com:5060
Call-ID: 1-10487@192.168.15.138
CSeq: 1 INVITE
Contact: sip:p0388883030@192.168.15.138:55073;transport=UDP
Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, INFO, MESSAGE, SUBSCRIBE, NOTIFY, PRACK, UPDATE, REFER
User-Agent: sipp
Max-Forwards: 70
Subject: Automation Test
Supported: 100rel
Content-Type: application/sdp
Content-Length: 139

v=0
o=user1 53655765 2353687637 IN IP4 192.168.15.138
s=-
c=IN IP4 192.168.15.138
t=0 0
m=audio 8052 RTP/AVP 8
a=rtpmap:8 PCMA/8000

----------------------------------------------- 2019-06-27 07:56:02.489823
UDP message received [289] bytes :

SIP/2.0 100 Trying
Via: SIP/2.0/UDP 192.168.15.138:55073;received=110.143.166.85;branch=z9hG4bK-10487-1-1;rport=55073
From: "0388883030" sip:p0388883030@nipt.telstra.com;tag=1
To: "0753527629" sip:0753527629@nipt.telstra.com:5060
Call-ID: 1-10487@192.168.15.138
CSeq: 1 INVITE

----------------------------------------------- 2019-06-27 07:56:02.498771
UDP message received [466] bytes :

SIP/2.0 401 Unauthorized
Via: SIP/2.0/UDP 192.168.15.138:55073;received=110.143.166.85;branch=z9hG4bK-10487-1-1;rport=55073
From: "0388883030" sip:p0388883030@nipt.telstra.com;tag=1
To: "0753527629" sip:0753527629@nipt.telstra.com:5060;tag=SD93rc999-1403741429-1561586162493
Call-ID: 1-10487@192.168.15.138
CSeq: 1 INVITE
WWW-Authenticate: DIGEST qop="auth",nonce="BroadWorksXjxds2yilTtgvqxjBW",realm="nipt.telstra.com",algorithm=MD5
Content-Length: 0

----------------------------------------------- 2019-06-27 07:56:02.498818
<<<this message="" was="" dropped="" by="" network="">>>
UDP message sent (598 bytes):</this>

ACK sip:0753527629@nipt.telstra.com:5060 SIP/2.0
Via: SIP/2.0/UDP 192.168.15.138:55073;received=110.143.166.85;branch=z9hG4bK-10487-1-1;rport=55073
From: "0388883030" sip:p0388883030@nipt.telstra.com;tag=1
To: "0753527629" sip:0753527629@nipt.telstra.com:5060;;tag=SD93rc999-1403741429-1561586162493
Call-ID: 1-10487@192.168.15.138
CSeq: 1 ACK
Contact: sip:p0388883030@192.168.15.138:55073;transport=UDP
Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, INFO, MESSAGE, SUBSCRIBE, NOTIFY, PRACK, UPDATE, REFER
User-Agent: sipp
Max-Forwards: 70
Subject: Automation Test
Content-Length: 0

----------------------------------------------- 2019-06-27 07:56:02.499923
UDP message sent (955 bytes):

INVITE sip:0753527629@nipt.telstra.com:5060 SIP/2.0
Via: SIP/2.0/UDP 192.168.15.138:55073;branch=z9hG4bK-10487-1-5
From: "0388883030" sip:p0388883030@nipt.telstra.com;tag=1
To: "0753527629" sip:0753527629@nipt.telstra.com:5060
Call-ID: 1-10487@192.168.15.138
CSeq: 2 INVITE
Contact: sip:p0388883030@192.168.15.138:55073;transport=UDP
Authorization: Digest username="0388883030",realm="nipt.telstra.com",cnonce="6b8b4567",nc=00000001,qop=auth,uri="sip:192.148.131.71:5060",nonce="BroadWorksXjxds2yilTtgvqxjBW",response="1cc56cbad5409b7e93f205700b423f6b",algorithm=MD5
Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, INFO, MESSAGE, SUBSCRIBE, NOTIFY, PRACK, UPDATE, REFER
User-Agent: sipp
Supported: 100rel
Max-Forwards: 70
Subject: Automation Test
Content-Type: application/sdp
Content-Length: 139

v=0
o=user1 53655765 2353687637 IN IP4 192.168.15.138
s=-
c=IN IP4 192.168.15.138
t=0 0
m=audio 8052 RTP/AVP 8
a=rtpmap:8 PCMA/8000

----------------------------------------------- 2019-06-27 07:56:03.000129
RETRY OF 4O1
UDP message received [466] bytes :

SIP/2.0 401 Unauthorized
Via: SIP/2.0/UDP 192.168.15.138:55073;received=110.143.166.85;branch=z9hG4bK-10487-1-1;rport=55073
From: "0388883030" sip:p0388883030@nipt.telstra.com;tag=1
To: "0753527629" sip:0753527629@nipt.telstra.com:5060;tag=SD93rc999-1403741429-1561586162493
Call-ID: 1-10487@192.168.15.138
CSeq: 1 INVITE
WWW-Authenticate: DIGEST qop="auth",nonce="BroadWorksXjxds2yilTtgvqxjBW",realm="nipt.telstra.com",algorithm=MD5
Content-Length: 0

----------------------------------------------- 2019-06-27 07:56:03.000190
UDP message sent (598 bytes):

ACK sip:0753527629@nipt.telstra.com:5060 SIP/2.0
Via: SIP/2.0/UDP 192.168.15.138:55073;received=110.143.166.85;branch=z9hG4bK-10487-1-1;rport=55073
From: "0388883030" sip:p0388883030@nipt.telstra.com;tag=1
To: "0753527629" sip:0753527629@nipt.telstra.com:5060;;tag=SD93rc999-1403741429-1561586162493
Call-ID: 1-10487@192.168.15.138
CSeq: 2 ACK <<< this should have been CSEQ 1 as it is a reponse to the previous 401.
Contact: sip:p0388883030@192.168.15.138:55073;transport=UDP
Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, INFO, MESSAGE, SUBSCRIBE, NOTIFY, PRACK, UPDATE, REFER
User-Agent: sipp
Max-Forwards: 70
Subject: Automation Test
Content-Length: 0

----------------------------------------------- 2019-06-27 07:56:03.001268
UDP message sent (955 bytes):

INVITE sip:0753527629@nipt.telstra.com:5060 SIP/2.0
Via: SIP/2.0/UDP 192.168.15.138:55073;branch=z9hG4bK-10487-1-5
From: "0388883030" sip:p0388883030@nipt.telstra.com;tag=1
To: "0753527629" sip:0753527629@nipt.telstra.com:5060
Call-ID: 1-10487@192.168.15.138
CSeq: 2 INVITE
Contact: sip:p0388883030@192.168.15.138:55073;transport=UDP
Authorization: Digest username="0388883030",realm="nipt.telstra.com",cnonce="6b8b4567",nc=00000001,qop=auth,uri="sip:192.148.131.71:5060",nonce="BroadWorksXjxds2yilTtgvqxjBW",response="1cc56cbad5409b7e93f205700b423f6b",algorithm=MD5
Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, INFO, MESSAGE, SUBSCRIBE, NOTIFY, PRACK, UPDATE, REFER
User-Agent: sipp
Supported: 100rel
Max-Forwards: 70
Subject: Automation Test
Content-Type: application/sdp
Content-Length: 139

v=0
o=user1 53655765 2353687637 IN IP4 192.168.15.138
s=-
c=IN IP4 192.168.15.138
t=0 0
m=audio 8052 RTP/AVP 8
a=rtpmap:8 PCMA/8000

----------------------------------------------- 2019-06-27 07:56:04.000842
UDP message received [466] bytes :

SIP/2.0 401 Unauthorized
Via: SIP/2.0/UDP 192.168.15.138:55073;received=110.143.166.85;branch=z9hG4bK-10487-1-1;rport=55073
From: "0388883030" sip:p0388883030@nipt.telstra.com;tag=1
To: "0753527629" sip:0753527629@nipt.telstra.com:5060;tag=SD93rc999-1403741429-1561586162493
Call-ID: 1-10487@192.168.15.138
CSeq: 1 INVITE
WWW-Authenticate: DIGEST qop="auth",nonce="BroadWorksXjxds2yilTtgvqxjBW",realm="nipt.telstra.com",algorithm=MD5
Content-Length: 0

----------------------------------------------- 2019-06-27 07:56:04.000890
UDP message sent (598 bytes):

ACK sip:0753527629@nipt.telstra.com:5060 SIP/2.0
Via: SIP/2.0/UDP 192.168.15.138:55073;received=110.143.166.85;branch=z9hG4bK-10487-1-1;rport=55073
From: "0388883030" sip:p0388883030@nipt.telstra.com;tag=1
To: "0753527629" sip:0753527629@nipt.telstra.com:5060;;tag=SD93rc999-1403741429-1561586162493
Call-ID: 1-10487@192.168.15.138
CSeq: 2 ACK
Contact: sip:p0388883030@192.168.15.138:55073;transport=UDP
Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, INFO, MESSAGE, SUBSCRIBE, NOTIFY, PRACK, UPDATE, REFER
User-Agent: sipp
Max-Forwards: 70
Subject: Automation Test
Content-Length: 0

----------------------------------------------- 2019-06-27 07:56:04.003015
UDP message sent (955 bytes):

INVITE sip:0753527629@nipt.telstra.com:5060 SIP/2.0
Via: SIP/2.0/UDP 192.168.15.138:55073;branch=z9hG4bK-10487-1-5
From: "0388883030" sip:p0388883030@nipt.telstra.com;tag=1
To: "0753527629" sip:0753527629@nipt.telstra.com:5060
Call-ID: 1-10487@192.168.15.138
CSeq: 2 INVITE
Contact: sip:p0388883030@192.168.15.138:55073;transport=UDP
Authorization: Digest username="0388883030",realm="nipt.telstra.com",cnonce="6b8b4567",nc=00000001,qop=auth,uri="sip:192.148.131.71:5060",nonce="BroadWorksXjxds2yilTtgvqxjBW",response="1cc56cbad5409b7e93f205700b423f6b",algorithm=MD5
Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, INFO, MESSAGE, SUBSCRIBE, NOTIFY, PRACK, UPDATE, REFER
User-Agent: sipp
Supported: 100rel
Max-Forwards: 70
Subject: Automation Test
Content-Type: application/sdp
Content-Length: 139

v=0
o=user1 53655765 2353687637 IN IP4 192.168.15.138
s=-
c=IN IP4 192.168.15.138
t=0 0
m=audio 8052 RTP/AVP 8
a=rtpmap:8 PCMA/8000

----------------------------------------------- 2019-06-27 07:56:06.002872
UDP message received [466] bytes :

SIP/2.0 401 Unauthorized
Via: SIP/2.0/UDP 192.168.15.138:55073;received=110.143.166.85;branch=z9hG4bK-10487-1-1;rport=55073
From: "0388883030" sip:p0388883030@nipt.telstra.com;tag=1
To: "0753527629" sip:0753527629@nipt.telstra.com:5060;tag=SD93rc999-1403741429-1561586162493
Call-ID: 1-10487@192.168.15.138
CSeq: 1 INVITE
WWW-Authenticate: DIGEST qop="auth",nonce="BroadWorksXjxds2yilTtgvqxjBW",realm="nipt.telstra.com",algorithm=MD5
Content-Length: 0

----------------------------------------------- 2019-06-27 07:56:06.002932
UDP message sent (598 bytes):

ACK sip:0753527629@nipt.telstra.com:5060 SIP/2.0
Via: SIP/2.0/UDP 192.168.15.138:55073;received=110.143.166.85;branch=z9hG4bK-10487-1-1;rport=55073
From: "0388883030" sip:p0388883030@nipt.telstra.com;tag=1
To: "0753527629" sip:0753527629@nipt.telstra.com:5060;;tag=SD93rc999-1403741429-1561586162493
Call-ID: 1-10487@192.168.15.138
CSeq: 2 ACK
Contact: sip:p0388883030@192.168.15.138:55073;transport=UDP
Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, INFO, MESSAGE, SUBSCRIBE, NOTIFY, PRACK, UPDATE, REFER
User-Agent: sipp
Max-Forwards: 70
Subject: Automation Test
Content-Length: 0

----------------------------------------------- 2019-06-27 07:56:06.005061
UDP message sent (955 bytes):

INVITE sip:0753527629@nipt.telstra.com:5060 SIP/2.0
Via: SIP/2.0/UDP 192.168.15.138:55073;branch=z9hG4bK-10487-1-5
From: "0388883030" sip:p0388883030@nipt.telstra.com;tag=1
To: "0753527629" sip:0753527629@nipt.telstra.com:5060
Call-ID: 1-10487@192.168.15.138
CSeq: 2 INVITE
Contact: sip:p0388883030@192.168.15.138:55073;transport=UDP
Authorization: Digest username="0388883030",realm="nipt.telstra.com",cnonce="6b8b4567",nc=00000001,qop=auth,uri="sip:192.148.131.71:5060",nonce="BroadWorksXjxds2yilTtgvqxjBW",response="1cc56cbad5409b7e93f205700b423f6b",algorithm=MD5
Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, INFO, MESSAGE, SUBSCRIBE, NOTIFY, PRACK, UPDATE, REFER
User-Agent: sipp
Supported: 100rel
Max-Forwards: 70
Subject: Automation Test
Content-Type: application/sdp
Content-Length: 139

v=0
o=user1 53655765 2353687637 IN IP4 192.168.15.138
s=-
c=IN IP4 192.168.15.138
t=0 0
m=audio 8052 RTP/AVP 8
a=rtpmap:8 PCMA/8000

----------------------------------------------- 2019-06-27 07:56:06.011538
UDP message received [289] bytes :

SIP/2.0 100 Trying
Via: SIP/2.0/UDP 192.168.15.138:55073;received=110.143.166.85;branch=z9hG4bK-10487-1-5;rport=55073
From: "0388883030" sip:p0388883030@nipt.telstra.com;tag=1
To: "0753527629" sip:0753527629@nipt.telstra.com:5060
Call-ID: 1-10487@192.168.15.138
CSeq: 2 INVITE

----------------------------------------------- 2019-06-27 07:56:06.150946
UDP message received [658] bytes :

SIP/2.0 180 Ringing
Via: SIP/2.0/UDP 192.168.15.138:55073;received=110.143.166.85;branch=z9hG4bK-10487-1-5;rport=55073
From: "0388883030" sip:p0388883030@nipt.telstra.com;tag=1
To: "0753527629" sip:0753527629@nipt.telstra.com:5060;tag=SD93rc999-770024129-1561586166145
Call-ID: 1-10487@192.168.15.138
CSeq: 2 INVITE
Allow: ACK,BYE,CANCEL,INFO,INVITE,OPTIONS,PRACK,REFER,NOTIFY
Supported:
Contact: sip:0753527629@192.148.131.71:5060;transport=udp
RSeq: 182777024
P-Asserted-Identity: "User4 PVTEnt_Cluster_3_PVTGrp3"sip:7629@10.83.144.167;user=phone
Call-Info: <sip:10.83.144.167>;appearance-index=1
Require: 100rel
Content-Length: 0</sip:10.83.144.167>

----------------------------------------------- 2019-06-27 07:56:06.151042
UDP message sent (430 bytes):

PRACK sip:0753527629@nipt.telstra.com:5060 SIP/2.0
Via: SIP/2.0/UDP 192.168.15.138:55073;branch=z9hG4bK-10487-1-8
From: "0388883030" sip:p0388883030@nipt.telstra.com;tag=1
To: "0753527629" sip:0753527629@nipt.telstra.com:5060;tag=SD93rc999-770024129-1561586166145
Call-ID: 1-10487@192.168.15.138
CSeq: 3 PRACK
RAck: 182777024 2 INVITE
User-Agent: sipp
Max-Forwards: 68
Subject: Automation Test
Content-Length: 0

----------------------------------------------- 2019-06-27 07:56:06.216797
UDP message received [341] bytes :

SIP/2.0 200 OK
Via: SIP/2.0/UDP 192.168.15.138:55073;received=110.143.166.85;branch=z9hG4bK-10487-1-8;rport=55073
From: "0388883030" sip:p0388883030@nipt.telstra.com;tag=1
To: "0753527629" sip:0753527629@nipt.telstra.com:5060;tag=SD93rc999-770024129-1561586166145
Call-ID: 1-10487@192.168.15.138
CSeq: 3 PRACK
Content-Length: 0

----------------------------------------------- 2019-06-27 07:56:08.253625
UDP message received [842] bytes :

SIP/2.0 200 OK
Via: SIP/2.0/UDP 192.168.15.138:55073;received=110.143.166.85;branch=z9hG4bK-10487-1-5;rport=55073
From: "0388883030" sip:p0388883030@nipt.telstra.com;tag=1
To: "0753527629" sip:0753527629@nipt.telstra.com:5060;tag=SD93rc999-770024129-1561586166145
Call-ID: 1-10487@192.168.15.138
CSeq: 2 INVITE
Allow: ACK,BYE,CANCEL,INFO,INVITE,OPTIONS,PRACK,REFER,NOTIFY
Supported:
Contact: sip:0753527629@192.148.131.71:5060;transport=udp
P-Asserted-Identity: "User4 PVTEnt_Cluster_3_PVTGrp3"sip:7629@10.83.144.167;user=phone
Call-Info: <sip:10.83.144.167>;appearance-index=1
Accept: application/media_control+xml,application/sdp
Content-Type: application/sdp
Content-Length: 135</sip:10.83.144.167>

v=0
o=BroadWorks 16726599 1 IN IP4 192.148.131.71
s=-
c=IN IP4 192.168.15.138
t=0 0
m=audio 8060 RTP/AVP 8
a=rtpmap:8 PCMA/8000

----------------------------------------------- 2019-06-27 07:56:08.253682
UDP message sent (464 bytes):

ACK sip:0753527629@nipt.telstra.com:5060 SIP/2.0
Via: SIP/2.0/UDP 192.168.15.138:55073;branch=z9hG4bK-10487-1-11
From: "0388883030" sip:p0388883030@nipt.telstra.com;tag=1
To: "0753527629" sip:0753527629@nipt.telstra.com:5060;;tag=SD93rc999-770024129-1561586166145
Call-ID: 1-10487@192.168.15.138
CSeq: 2 ACK
Contact: sip:p0388883030@192.168.15.138:55073;transport=UDP
User-Agent: sipp
Max-Forwards: 70
Subject: Automation Test
Content-Length: 0

----------------------------------------------- 2019-06-27 07:56:10.004359
UDP message received [466] bytes :

SIP/2.0 401 Unauthorized
Via: SIP/2.0/UDP 192.168.15.138:55073;received=110.143.166.85;branch=z9hG4bK-10487-1-1;rport=55073
From: "0388883030" sip:p0388883030@nipt.telstra.com;tag=1
To: "0753527629" sip:0753527629@nipt.telstra.com:5060;tag=SD93rc999-1403741429-1561586162493
Call-ID: 1-10487@192.168.15.138
CSeq: 1 INVITE
WWW-Authenticate: DIGEST qop="auth",nonce="BroadWorksXjxds2yilTtgvqxjBW",realm="nipt.telstra.com",algorithm=MD5
Content-Length: 0

----------------------------------------------- 2019-06-27 07:56:10.004464
UDP message sent (598 bytes):

ACK sip:0753527629@nipt.telstra.com:5060 SIP/2.0
Via: SIP/2.0/UDP 192.168.15.138:55073;received=110.143.166.85;branch=z9hG4bK-10487-1-5;rport=55073
From: "0388883030" sip:p0388883030@nipt.telstra.com;tag=1
To: "0753527629" sip:0753527629@nipt.telstra.com:5060;;tag=SD93rc999-1403741429-1561586162493
Call-ID: 1-10487@192.168.15.138
CSeq: 3 ACK
Contact: sip:p0388883030@192.168.15.138:55073;transport=UDP
Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, INFO, MESSAGE, SUBSCRIBE, NOTIFY, PRACK, UPDATE, REFER
User-Agent: sipp
Max-Forwards: 70
Subject: Automation Test
Content-Length: 0

----------------------------------------------- 2019-06-27 07:56:14.004987
UDP message received [466] bytes :

SIP/2.0 401 Unauthorized
Via: SIP/2.0/UDP 192.168.15.138:55073;received=110.143.166.85;branch=z9hG4bK-10487-1-1;rport=55073
From: "0388883030" sip:p0388883030@nipt.telstra.com;tag=1
To: "0753527629" sip:0753527629@nipt.telstra.com:5060;tag=SD93rc999-1403741429-1561586162493
Call-ID: 1-10487@192.168.15.138
CSeq: 1 INVITE
WWW-Authenticate: DIGEST qop="auth",nonce="BroadWorksXjxds2yilTtgvqxjBW",realm="nipt.telstra.com",algorithm=MD5
Content-Length: 0

----------------------------------------------- 2019-06-27 07:56:14.005062
UDP message sent (598 bytes):

ACK sip:0753527629@nipt.telstra.com:5060 SIP/2.0
Via: SIP/2.0/UDP 192.168.15.138:55073;received=110.143.166.85;branch=z9hG4bK-10487-1-5;rport=55073
From: "0388883030" sip:p0388883030@nipt.telstra.com;tag=1
To: "0753527629" sip:0753527629@nipt.telstra.com:5060;;tag=SD93rc999-1403741429-1561586162493
Call-ID: 1-10487@192.168.15.138
CSeq: 3 ACK
Contact: sip:p0388883030@192.168.15.138:55073;transport=UDP
Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, INFO, MESSAGE, SUBSCRIBE, NOTIFY, PRACK, UPDATE, REFER
User-Agent: sipp
Max-Forwards: 70
Subject: Automation Test
Content-Length: 0

----------------------------------------------- 2019-06-27 07:56:18.006026
UDP message received [466] bytes :

SIP/2.0 401 Unauthorized
Via: SIP/2.0/UDP 192.168.15.138:55073;received=110.143.166.85;branch=z9hG4bK-10487-1-1;rport=55073
From: "0388883030" sip:p0388883030@nipt.telstra.com;tag=1
To: "0753527629" sip:0753527629@nipt.telstra.com:5060;tag=SD93rc999-1403741429-1561586162493
Call-ID: 1-10487@192.168.15.138
CSeq: 1 INVITE
WWW-Authenticate: DIGEST qop="auth",nonce="BroadWorksXjxds2yilTtgvqxjBW",realm="nipt.telstra.com",algorithm=MD5
Content-Length: 0

----------------------------------------------- 2019-06-27 07:56:18.006092
UDP message sent (598 bytes):

ACK sip:0753527629@nipt.telstra.com:5060 SIP/2.0
Via: SIP/2.0/UDP 192.168.15.138:55073;received=110.143.166.85;branch=z9hG4bK-10487-1-5;rport=55073
From: "0388883030" sip:p0388883030@nipt.telstra.com;tag=1
To: "0753527629" sip:0753527629@nipt.telstra.com:5060;;tag=SD93rc999-1403741429-1561586162493
Call-ID: 1-10487@192.168.15.138
CSeq: 3 ACK
Contact: sip:p0388883030@192.168.15.138:55073;transport=UDP
Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, INFO, MESSAGE, SUBSCRIBE, NOTIFY, PRACK, UPDATE, REFER
User-Agent: sipp
Max-Forwards: 70
Subject: Automation Test

Content-Length: 0

----------------------------------------------- 2019-06-27 07:56:18.258274
UDP message sent (462 bytes):

BYE sip:0753527629@192.148.131.71:5060 SIP/2.0
Via: SIP/2.0/UDP 192.168.15.138:55073;branch=z9hG4bK-10487-1-14
From: "0388883030" sip:p0388883030@nipt.telstra.com;tag=1
To: "0753527629" sip:0753527629@nipt.telstra.com:5060;tag=SD93rc999-1403741429-1561586162493
Call-ID: 1-10487@192.168.15.138
Cseq: 4 BYE
Contact: sip:p0388883030@192.168.15.138:55073;transport=UDP
User-Agent: sipp
Max-Forwards: 70
Subject: Automation Test
Content-Length: 0

----------------------------------------------- 2019-06-27 07:56:18.330656
UDP message received [353] bytes :

SIP/2.0 481 Unknown Dialog
Via: SIP/2.0/UDP 192.168.15.138:55073;received=110.143.166.85;branch=z9hG4bK-10487-1-14;rport=55073
From: "0388883030" sip:p0388883030@nipt.telstra.com;tag=1
To: "0753527629" sip:0753527629@nipt.telstra.com:5060;tag=SD93rc999-1403741429-1561586162493
Call-ID: 1-10487@192.168.15.138
Cseq: 4 BYE
Content-Length: 0

Unexpected UDP message received:

SIP/2.0 481 Unknown Dialog
Via: SIP/2.0/UDP 192.168.15.138:55073;received=110.143.166.85;branch=z9hG4bK-10487-1-14;rport=55073
From: "0388883030" sip:p0388883030@nipt.telstra.com;tag=1
To: "0753527629" sip:0753527629@nipt.telstra.com:5060;tag=SD93rc999-1403741429-1561586162493
Call-ID: 1-10487@192.168.15.138
Cseq: 4 BYE
Content-Length: 0

----------------------------------------------- 2019-06-27 07:56:18.330727
UDP message sent (413 bytes):

BYE sip:0753527629@nipt.telstra.com:5060 SIP/2.0
Via: SIP/2.0/UDP 192.168.15.138:55073;branch=z9hG4bK-10487-1--1
From: "0388883030" sip:p0388883030@nipt.telstra.com;tag=1
To: "0753527629" sip:0753527629@nipt.telstra.com:5060;tag=SD93rc999-1403741429-1561586162493
Call-ID: 1-10487@192.168.15.138
CSeq: 5 BYE
Max-Forwards: 70
Contact: sip:sipp@192.168.15.138:55073;transport=UDP
Content-Length: 0

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