Re: struct iphdr in include/linux/ip.h (probably bug in headerfile)

[Andreas Schwab <schwab@suse.de>]

k8 s <uint32@gmail.com> writes:

> Hello,
>
> The following definition in linux/include/ip.h is creating problems.
>
> How does Endianness affect BIT ORDER 
> IT affetc only  BYTE ORDER

Bit order and byte order are independent properties of the architecture.
That's why they are configured with different macros.

> ------------------------------------------------------------------------
> struct iphdr {
> #if defined(__LITTLE_ENDIAN_BITFIELD)
>         __u8    ihl:4,
>                 version:4;
> #elif defined (__BIG_ENDIAN_BITFIELD)
>         __u8    version:4,
>                 ihl:4;
> --------------------------------------------------------------------------
> Here I have a network device which works on both little endian and big
> endian machines.
> I found out that the driver of the device was saying unrecognizable
> packet when i assign

The you probably didn't define the right macro of the ones referenced
above.

Andreas.

-- 
Andreas Schwab, SuSE Labs, schwab@suse.de
SuSE Linux Products GmbH, Maxfeldstraße 5, 90409 Nürnberg, Germany
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