On Tue, Mar 09, 2010 at 06:03:02PM +0100, Jan Engelhardt wrote:
> On Tuesday 2010-03-09 17:48, Lutz Jaenicke wrote:
>
> >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.
>
> Why does it evaluate to 4 bytes? That seems to go against all good C
> practice.
I agree wrt the "against all good C practice" point of view :-)
Nevertheless it fails in the policy check via tcp_nla_policy[]:
[CTA_PROTOINFO_TCP_FLAGS_ORIGINAL] = { .len = sizeof(struct nf_ct_tcp_flags) },
[CTA_PROTOINFO_TCP_FLAGS_REPLY] = { .len = sizeof(struct nf_ct_tcp_flags) },
The expected length in "validate_nla()" case "default:" is
pt->len = 4
while from user space only 2 byte are sent.
If you have a good hint on how to answer the
"Why does it evaluate to 4 bytes?"
question, you are welcome... I cannot explain, I just observed.
Best regards,
Lutz
--
Dr.-Ing. Lutz Jänicke
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