Re: Fields alignment when extended mask is present

On Mon, 2011-02-21 at 10:47 +0100, Roberto Riggio wrote:

> >> rate_1 (8)
> >> retry _1 (8)
> >> rate_2 (8)
> >> retry _2 (8)
> > What's with the "(8)"? Generally, anything in the data portion of
> > radiotap needs to be padded to the right position.
> (8) was the field length. in the example above i;ve repoted
> two different radiotap headers where i specify twice the rate
> and the retries field.
> 
> of course i know that in this case i will have to put to it-present
> bitmasks and i will have to set the bit 31 of the first bitmask to 1.
> 
> what i'm not sure is if i have to pad the first "block" to the word
> boundary or not.

I still don't get it. If the field length is 8 bits (1 byte) you don't
need any alignment anyway.

johannes