netdev - Re: [PATCH] ipv6: add anti-spoofing checks for 6to4 and 6rd

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Message-ID: <20130117132737.GA32036@order.stressinduktion.org>
Date:	Thu, 17 Jan 2013 14:27:37 +0100
From:	Hannes Frederic Sowa <hannes@...essinduktion.org>
To:	netdev@...r.kernel.org
Subject: Re: [PATCH] ipv6: add anti-spoofing checks for 6to4 and 6rd

On Thu, Jan 17, 2013 at 04:32:58AM +0100, Hannes Frederic Sowa wrote:
> +static int sit_chksrc(struct ip_tunnel *tunnel, const __be32 *addr,
> +		const struct in6_addr *addr6)
> +{
> +#ifdef CONFIG_IPV6_SIT_6RD
> +	if (ipv6_prefix_equal(addr6, &tunnel->ip6rd.prefix,
> +				tunnel->ip6rd.prefixlen) &&
> +		memcmp(addr, &addr6->s6_addr16[1], 4))
> +		return 0;

This is wrong. David, please drop my patch, sorry. I will respin another one.
In 6rd setups one can, of course, have longer prefixlens than 16.

Thanks!

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