Re: match'ing packets by size

Linux Advanced Routing and Traffic Control

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    Hi Ethy :)

 * Ethy H. Brito <ethy.brito@xxxxxxxxxxxx> dixit:
> > > Well, 0xffb0 translates to 1111 1111 1011 0000 (which is -80 BTW).
> > 
> >     It is a mask, not a number (and certainly not a signed one), so
> > there's no point in considering it -80. It is just a mask.
> 
> My point in considering it a number is explained by:
> 
>    printf("%hx", -80); 

    OK, I just didn't think about that, sorry :)

> So, if you intend to creat a mask for 256 bytes size, you printf it as -256.

    Only if your C implementation treats negative numbers in 2's
complement ;) Of course, I don't know of any C implementation where
integers don't use 2's complement for negative numbers, anyway...

    Raúl Núñez de Arenas Coronado

-- 
Linux Registered User 88736 | http://www.dervishd.net
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