Re: error executing ksniff with libpcap 1.0.0

[Guy Harris <guy () alum mit edu>]

On Nov 17, 2008, at 3:24 PM, Giovanni Venturi wrote:

> int result = 9;
> result = pcap_next_ex(m_pcapfp, &hdr, (const u_char **)&p);
>
> Sometimes I get 9, sometimes I get 1, ...
>
> How can it be possible that the return value doesn't change result  
> variable?

If you *truly* set a variable to, say, 9, and then later set it from  
the return value of a function, and immediately after setting it from  
the return value of the function it still has the value you originally  
set it to, then either

        1) there's a hardware problem on your machine;

        2) there's a compiler problem on your machine;

        3) the function sometimes returns 9.

I went through the pcap_next_ex() code path on Linux - it can't return  
9 when doing a live capture.  That leaves a hardware or compiler  
problem....
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