Le mardi 09 mars 2010 à 17:48 +0100, Lutz Jaenicke a écrit :
> On some platforms (here: Intel IXP4xx ARM big endian)
> sizeof(struct nf_ct_tcp_flags) evaluates to 4 bytes while in the user
> space code 2 bytes is hard coded.
> Add "__attribute__ ((__packed__))" to enforce matching structure
> sizes.
>
> Signed-off-by: Lutz Jaenicke <ljaenicke@xxxxxxxxxxxxxx>
> ---
> include/linux/netfilter/nf_conntrack_tcp.h | 2 +-
> 1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/include/linux/netfilter/nf_conntrack_tcp.h b/include/linux/netfilter/nf_conntrack_tcp.h
> index 6e135f9..c7ee4ec 100644
> --- a/include/linux/netfilter/nf_conntrack_tcp.h
> +++ b/include/linux/netfilter/nf_conntrack_tcp.h
> @@ -39,7 +39,7 @@ enum tcp_conntrack {
> /* The field td_maxack has been set */
> #define IP_CT_TCP_FLAG_MAXACK_SET 0x20
>
> -struct nf_ct_tcp_flags {
> +struct __attribute__ ((packed)) nf_ct_tcp_flags {
> __u8 flags;
> __u8 mask;
> };
Preferred way is to use :
struct nf_ct_tcp_flags {
...
} __attribute__ ((packed));
This eases grep games a bit.
Thanks
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