[lwip-devel] [bug #54076] tcp: timeout required in FIN_WAIT_2 if pcb has been closed

[Simon Goldschmidt]

URL:
  <http://savannah.nongnu.org/bugs/?54076>

                 Summary: tcp: timeout required in FIN_WAIT_2 if pcb has been
closed
                 Project: lwIP - A Lightweight TCP/IP stack
            Submitted by: goldsimon
            Submitted on: Wed 06 Jun 2018 08:10:06 PM UTC
                Category: None
                Severity: 3 - Normal
              Item Group: None
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
         Planned Release: None
            lwIP version: git head

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Details:

Since tcp_alloc() does not kill same-priority pcbs any more (only lower
priorities), we need a timeout in FIN_WAIT_2.

However, this timeout must not trigger if the connection has deliberately
half-closed (i.e. shutdown was called, not close).




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