[lwip-devel] [bug #44583] Sequence number overrun mishandling for out-of-sequence TCP packets

[Clint Sbisa]

URL:
  <http://savannah.nongnu.org/bugs/?44583>

                 Summary: Sequence number overrun mishandling for
out-of-sequence TCP packets
                 Project: lwIP - A Lightweight TCP/IP stack
            Submitted by: csbisa
            Submitted on: Fri 20 Mar 2015 12:44:57 AM GMT
                Category: Contrib
                Severity: 3 - Normal
              Item Group: Faulty Behaviour
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
         Planned Release: 
            lwIP version: git head

    _______________________________________________________

Details:

Checks for receive window overruns aren't handling overflows properly in the
case of out-of-sequence TCP packets. LWIP does not crash, but the TCP
connection typically falls out of sync until a timeout resets the connection.

The fix is fairly simple-- the offending code was not using macros that are
used everywhere else in the file. A patch that fixes this is attached.

The patch also includes a test case that was failing without the fix.



    _______________________________________________________

File Attachments:


-------------------------------------------------------
Date: Fri 20 Mar 2015 12:44:57 AM GMT  Name:
0001-tcp-Fix-ooseq-processing-when-seqno-is-near-2-32.patch  Size: 5kB   By:
csbisa

<http://savannah.nongnu.org/bugs/download.php?file_id=33408>

    _______________________________________________________

Reply to this item at:

  <http://savannah.nongnu.org/bugs/?44583>

_______________________________________________
  Message sent via/by Savannah
  http://savannah.nongnu.org/