[lwip-devel] [bug #28054] Two segments with FIN flag on the out-of-sequence queue

[Oleg Tyshev]

URL:
  <http://savannah.nongnu.org/bugs/?28054>

                 Summary: Two segments with FIN flag on the out-of-sequence
queue
                 Project: lwIP - A Lightweight TCP/IP stack
            Submitted by: olegreen
            Submitted on: Thu 19 Nov 2009 04:55:13 PM GMT
                Category: TCP
                Severity: 3 - Normal
              Item Group: Faulty Behaviour
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
         Planned Release: 
            lwIP version: CVS Head

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Details:

Suppouse we have on the oos_queue one segment
  seqno=2100, len=100, FIN flag
After retransmit we receive out of sequence 2nd segment
  seqno=1100, len=1100, FIN flag

After trimming we have on the oos queue
two segments with FIN flag
  seqno=1100, len=1000, FIN flag
  seqno=2100, len=100, FIN flag

If second segment will be received in-sequence - everything all right, oos
queue will be deleted,
but in this case flags are not processed correct.




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