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Normal Topic PhoneLite Bug - RFC 6337 Violation (Read 255 times)
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PhoneLite Bug - RFC 6337 Violation
05. Oct 2019 at 13:20
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Hello Phoner Admin,

Just found another bug in its SIP Stack:

When PhonerLite is configured to send INVITE without SDP (i.e. delayed-offer), if it receives an offer in a provisional response (1xx) with 100rel, it must answer in the PRACK acknowledging the 100rel Response (with SDP offer), however, phone sends PRACK without any SDP.

According to RFC 6337:

       Offer                Answer             RFC    Ini Est Early
     -------------------------------------------------------------------
     1. INVITE Req.          2xx INVITE Resp.     RFC 3261  Y   Y    N
     2. 2xx INVITE Resp.     ACK Req.             RFC 3261  Y   Y    N
     3. INVITE Req.          1xx-rel INVITE Resp. RFC 3262  Y   Y    N
     4. 1xx-rel INVITE Resp. PRACK Req.           RFC 3262  Y   Y    N <<<<<<< our case
     5. PRACK Req.           200 PRACK Resp.      RFC 3262  N   Y    Y
     6. UPDATE Req.          2xx UPDATE Resp.     RFC 3311  N   Y    Y


Attached a signaling trace for your reference.

BR,
Moatassem

  

PhonerLite_BadPRACK.pcapng ( 4 KB | 7 Downloads )
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Re: PhoneLite Bug - RFC 6337 Violation
Reply #1 - 07. Oct 2019 at 13:29
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In the actual beta version of PhonerLite that should be implemented. Please check and report if it works.
  
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Re: PhoneLite Bug - RFC 6337 Violation
Reply #2 - 07. Oct 2019 at 15:16
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Thanks Heiko .. It is working
  
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Re: PhoneLite Bug - RFC 6337 Violation
Reply #3 - 07. Oct 2019 at 15:25
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Thanks for the feedback
  
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