[lwip-devel] [bug #44092] tcp_pcb hangs in FIN_WAIT_1 after lwip_close call

[Torbjørn Tvermosegaard]

URL:
  <http://savannah.nongnu.org/bugs/?44092>

                 Summary: tcp_pcb hangs in FIN_WAIT_1 after lwip_close call
                 Project: lwIP - A Lightweight TCP/IP stack
            Submitted by: tbt
            Submitted on: Mon Jan 26 13:56:10 2015
                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: 1.4.0

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Details:

On a socket connection to a PC through a switch it seems that the lwip does
not properly handle the situation, that the cable between switch and PC is
disconnected (this means that interface in lwip is still up). I have an
application that discovers the lack of communication and calls lwip_close, but
it seems that the tcp_pcb is stuck in FIN_WAIT_1 because it never receives any
further data on the connection.




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