Re: arptables ruleset not working when compiling on fedora6,7,8/centos 5/redhat 5

[Nishit Shah <nsshah.82@gmail.com>]

On Mon, Jun 29, 2009 at 9:14 PM, Patrick McHardy<kaber@trash.net> wrote:
> Nishit Shah wrote:
>>
>> On Mon, Jun 29, 2009 at 8:28 PM, Patrick McHardy<kaber@trash.net> wrote:
>>>
>>> Nishit Shah wrote:
>>>>
>>>> On Mon, Jun 29, 2009 at 7:51 PM, Richard
>>>> Horton<arimus.uk@googlemail.com>
>>>> wrote:
>>>>>
>>>>> 2009/6/29 Nishit Shah <nsshah.82@gmail.com>:
>>>>>>
>>>>>> Hi,
>>>>>>       I am compiling arptables-v0.0.3-3/arptables-v0.0.3-2 on
>>>>>> fedora6,7,8/centos 5/redhat 5. Module is compiled successfully.
>>>>>> Following are the simple steps.
>>>
>>> Which kernel versions (the lowest) are these running?
>>>
>>
>> lowest is 2.6.18.
>
> Ah, I remember, we had some breakage with of the ARPT codes with the
> introduction of x_tables in 2.6.16. Please try to figure out the
> difference of those values between working and non-working state
> (ARPT_CONTINUE, ARPT_RETURN etc.)
>

Bingo !!!

It is due to the value of ARPT_RETURN. ARPT_RETURN defined in
arptables-v0.0.3-3 is

./include/linux/netfilter_arp/arp_tables.h:#define ARPT_RETURN
(-NF_MAX_VERDICT - 1)

and value of NF_MAX_VERDICT is different on machine running with gcc
2.96/glibc 2.2.4 and above all machines.

value of NF_MAX_VERDICT on machine running gcc 2.96 and glibc 2.2.4,

        /usr/include/linux/netfilter.h:#define NF_MAX_VERDICT NF_REPEAT

and same file on all above machines,

        /usr/include/linux/netfilter.h:#define NF_MAX_VERDICT NF_STOP

Thanks Patrick :)

Rgds,
Nishit Shah.