Re: [PATCH 1/2] netfilter: helper: Fix incorrect helper name.

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2016-05-24 13:33 GMT+09:00 Feng Gao <gfree.wind@xxxxxxxxx>:
> Hi Pablo,
>
> I committed the similar fix long ago, about some month ago.
> I have changed the codes according to your advice.
> The links are http://patchwork.ozlabs.org/patch/565169/,
> http://patchwork.ozlabs.org/patch/565170,
> http://patchwork.ozlabs.org/patch/565171
>
> But they are not accepted until now.
> Is there any problem now?
>
> Best Regards
> Feng
>
> On Sun, May 22, 2016 at 11:03 PM, Taehee Yoo <ap420073@xxxxxxxxx> wrote:
>>
>> 2016-05-17 19:38 GMT+09:00 Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>:
>> > On Sat, May 14, 2016 at 10:19:16PM +0900, Taehee Yoo wrote:
>> >> when register to helper, each helper adds port to name.
>> >> correct form is 'protocol name-port' but irc, sip and tftp adds
>> >> a iterator value. so it fix it.
>> >
>> > Could you track since when this works in this way?
>> >
>> > This inconsistency has been probably there since long time ago, and we
>> > expose this names through iptables -m helper.
>> >
>> > What I mean is: I understand this is inconsistent, but if we change
>> > this now, we may break existing rulesets.
>>
>>
>> Thank you for your review.
>> And Apologize for late reply.
>>
>> I agree that patch destroys so much rulesets.
>> but I want to solve the issue that is helper cannot check duplicated
>> helper rules.
>> nf_conntrack_helper_register() checks name && l3num && protonum to
>> check duplicated rules.
>> but tftp, sip and irc helper always have unique helper name because
>> that includes iterator value.
>> (tftp-1, tftp-2, tftp-3 ...)
>> helper-name is good method to check duplicated rules.
>> but we need another check method to solve this issue and keep rulsets.
>> so far, my idea is that using help callback function's pointer address.
>> pseudo code is : "if (port && l3num && protonum && help)"
>>
>> Do you have any advice?
>>
>> Taehee Yoo
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>
>


Hi,

I Apologize for my mistake.
I didn't check patchwork before sending this patch.

Also thank you for much friendly advice

Taehee Yoo
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