C warning that I can't seem to track down

[Alex Beamish]

On 8/8/06, bob <ican-rZHaEmXdJNJWk0Htik3J/w at public.gmane.org> wrote:
>
> In newer versions of the GCC compiler the block of C code:
>
> int length;
>
> ...
>
> if(getsockname(s, (struct sockaddr *)&sin, &length))
>
> gives a warning below
>
> socketUtils.c:259: warning: pointer targets in passing argument 3 of
> 'getsockname' differ in signedness


Hi Bob,

Google tells me at


http://www.penguin-soft.com/penguin/man/2/getsockname.html?manpath=/man/man2/getsockname.2.inc

that getsockname has the following prototype:

  int getsockname(int s , struct sockaddr * name , socklen_t * namelen );

so you need to cast length to a pointer to socklen_t, even if that works out
to an int in the end. Change your line to

  if(getsockname(s, (struct sockaddr *)&sin, (socklen_t *)&length))

and re-compile. Let us know how it all works.

I tracked it down to a define called "socklen_t".    Damned if I can find
> where that is defined.


Google is your friend. :)

-- 
Alex Beamish
Toronto, Ontario
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