Subject: Re: [PATCH 1/3] netfilter: xt_ipvs (netfilter matcher for IPVS)

From: Patrick McHardy <[email-masked]>
Date: Wed, 02 Sep 2009 19:51:42 +0200

Jan Engelhardt wrote:
> On Wednesday 2009-09-02 17:36, Patrick McHardy wrote:
>>> Nice, I'll use par->family.
>>>
>>> So in theory I do not even need a check like the following in the beginning?
>>>
>>> 	if (family != NFPROTO_IPV4
>>> #ifdef CONFIG_IP_VS_IPV6
>>> 	    && family != NFPROTO_IPV6
>>> #endif
>>> 		) {
>>> 		match = false;
>>> 		goto out;
>>> 	}
>> With the AF_UNSPEC registration of your match, it might be used
> 
> par->family always contains the NFPROTO of the invoking implementation,
> which can never be UNSPEC (except, in future, xtables2 ;-)

I didn't say it will be UNSPEC, I said it might be something
different than IPV4/IPV6 unless that is checked *somewhere*.