[lwip-devel] [bug #27771] Silly-window-avoidance shrinks window unnecessarily

[Simon Goldschmidt]

URL:
  <http://savannah.nongnu.org/bugs/?27771>

                 Summary: Silly-window-avoidance shrinks window unnecessarily
                 Project: lwIP - A Lightweight TCP/IP stack
            Submitted by: goldsimon
            Submitted on: Mi 21 Okt 2009 17:23:07 GMT
                Category: TCP
                Severity: 3 - Normal
              Item Group: None
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
         Planned Release: 
            lwIP version: 1.3.1

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Details:

[This has been reported on lwip-users today (together with summaries "TCP
payload is doubled" and "TCP problem" in the last days).]

The algorithm seems to shrink the window even if tcp_recved() is called
inside the recv-callback and there hasn't been a shrinked window announced.
When calling tcp_recved() for all data inside the recv-callback, no window
change should occur at all.

Since this bug was introduced in 1.3.1, it would be a good idea to delay
1.3.2 until this is fixed, I guess.




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