[lwip-devel] [bug #26267] Simultaneous close

[Oleg Tyshev]

Follow-up Comment #14, bug #26267 (project lwip):

Exists one more issue with close of the connection.
FIN could be inserted to out of sequence queue.
If we want to support later shutdown() for sockets,
FIN should be accepted for transition to other TCP states only if it was
accepted in sequence.

Now tcp_receive() returns true for any segment that was received in sequence,
we could change it.
The function can return true if it was received FIN in sequence (in current
packet or as result of filling gap in out of sequence queue)

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