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[lwip-devel] [bug #28716] select() returns 0 after waiting for less than

From: Stephane Lesage
Subject: [lwip-devel] [bug #28716] select() returns 0 after waiting for less than 1 ms
Date: Sat, 23 Jan 2010 01:37:24 +0000
User-agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; .NET CLR 2.0.50727; .NET CLR 1.1.4322; .NET CLR 3.0.04506.30; .NET CLR 3.0.04506.648; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729) 
URL:
  <http://savannah.nongnu.org/bugs/?28716>

                 Summary: select() returns 0 after waiting for less than 1 ms
                 Project: lwIP - A Lightweight TCP/IP stack
            Submitted by: slesage
            Submitted on: sam 23 jan 2010 02:37:23 CET
                Category: None
                Severity: 3 - Normal
              Item Group: Faulty Behaviour
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
         Planned Release: 
            lwIP version: CVS Head

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Details:

I had problems with select() with timeout after accept() returning 0
immediately when the client send data immediately.

There's a bug in lwip_select() in select.c line 1003.

The return value of sys_sem_wait_timeout() should be tested against
SYS_ARCH_TIMEOUT and not 0...









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