[lwip-devel] [bug #49827] wrong cast to size_t on 16-bit x86 architecture

[Alexander]

URL:
  <http://savannah.nongnu.org/bugs/?49827>

                 Summary: wrong cast to size_t on 16-bit x86 architecture
                 Project: lwIP - A Lightweight TCP/IP stack
            Submitted by: pronkin
            Submitted on: Mon 12 Dec 2016 08:10:55 AM GMT
                Category: Platform ports
                Severity: 3 - Normal
              Item Group: Faulty Behaviour
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
         Planned Release: None
            lwIP version: 2.0.0

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Details:

I work on DOS-like 16-bit OS and recently updated lwip from 1.4.1 to 2.0.0.
and found that in timouts.c:182
(http://git.savannah.gnu.org/cgit/lwip.git/tree/src/core/timeouts.c#n182)

sys_timeout(lwip_cyclic_timers[i].interval_ms, cyclic_timer,
(void*)(size_t)&lwip_cyclic_timers[i]);

unnecessary cast to size_t (before cast to void *) results wrong pointer value
in real mode x86 applications.





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