[U-Boot] IP_t should be a "packed" struct

[Luigi 'Comio' Mantellini <luigi.mantellini.ml@gmail.com>]

Hi ML,

I noticed that also the others headers structs have the same potential 
problem.
I attached the patch to fix the net.h header file.

best regards,

luigi

On Tuesday 27 January 2009 19:32:10 Luigi 'Comio' Mantellini wrote:
> Hi ML,
>
> I'm working on a mips target and I used qemu_mips target to simulate my
> target (that I hope to have in the next week...)
>
> Following my activities I noticed that IP_t structure is no defined with
> attribute "packed". I noticed this issue because using a self-made
> toolchain (gcc4.2.4+binutils2.8+uclibc0.9.30) the compiler has aligned all
> bytes to 32bit boundary. This is not ok, because the packets IP_t can be
> non aligned (see the /net/net.c PingSend function, for an example).
>
> The dirty solution is to define the structure with the
> __attribute__((__packed__))... but, from my point of view, a better packet
> forging mechanism should be implemented into the net.c stack.
>
> I attached a trivial patch that solved the issue on my target.
>
> Any comments is welcome.
>
> best regards,
>
> luigi

-- 
Luigi Mantellini
R&D - Software
Industrie Dial Face S.p.A.
Via Canzo, 4
20068 Peschiera Borromeo (MI), Italy
Tel.:  +39 02 5167 2813
Fax:   +39 02 5167 2459
Email: luigi.mantellini at idf-hit.com

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