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Normal Topic SIP Stack bug in PhonerLite (Read 3213 times)
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SIP Stack bug in PhonerLite
19. Nov 2017 at 21:07
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Hello Phoner support,

There is a bug in your SIP Stack.

Phoner sends 'double' ACK for some 4xx responses like 403, 487, etc. My advanced B2BUA SIP Server (SIP Engine [SE]) detects the 2nd ACK and sends 481 as per RFC 3261. This is because with the reception of first ACK, SE disposes the session from its memory, so it sends 481 to this 'rogue' out-of-dialog request.

See attached Wireshark trace.

192.168.1.2 is my own SIP Server (MT SIP Engine)
192.168.1.100 is Phoner1 (Caller)
192.168.1.200 is Phoner2 (Called)

Regards,
Moatassem
Voice Engineering & Developer
  
T12.pcapng ( 10 KB | 184 Downloads )
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Re: SIP Stack bug in PhonerLite
Reply #1 - 20. Nov 2017 at 08:19
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What version of PhonerLite are you using? This bug has been fixed since years!
  
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Re: SIP Stack bug in PhonerLite
Reply #2 - 24. Nov 2017 at 23:15
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I was not using the latest 2.55.

Thanks.
  
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Re: SIP Stack bug in PhonerLite
Reply #3 - 27. Nov 2017 at 09:59
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Please test again with the latest version and tell me if it is OK now.
  
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