linux-kernel - Re: [patch nf-next] IPVS: ICMPv6 checksum calculation

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Date:	Fri, 20 Aug 2010 16:48:20 +0300 (EEST)
From:	Julian Anastasov <ja@....bg>
To:	xiaoyu Du <tingsrain@...il.com>
cc:	Simon Horman <horms@...ge.net.au>,
	David Miller <davem@...emloft.net>,
	linux-kernel@...r.kernel.org, lvs-devel@...r.kernel.org,
	netfilter-devel@...r.kernel.org, kaber@...sh.net
Subject: Re: [patch nf-next] IPVS: ICMPv6 checksum calculation


	Hello,

On Fri, 20 Aug 2010, xiaoyu Du wrote:

> I just replied to thank for his idea then, as he gived me some ideas
> on how to manipulate
> checksum. I tested the code today, but it doesn't seem to work. (I just wrote a
> netfilter module and hooked the code on local_out , then ping6 the
> address on another PC,
> It failed.). I'll find out why.

	May be because I copied csum_ipv6_magic() code from
your patch. Please, try with one '~' before csum_ipv6_magic.

> >> >>>      icmph->icmp6_cksum = csum_ipv6_magic(&iph->saddr,
> >> >>>              &iph->daddr,
> >> >>>              skb->len - icmp_offset, IPPROTO_ICMPV6,
> >> >>>              0);
> >> >>>      skb->csum_start = skb_network_header(skb) - skb->head +
> >> >>>                        icmp_offset;
> >> >>>      skb->csum_offset = offsetof(struct icmp6hdr, icmp6_cksum);
> >> >>>      skb->ip_summed = CHECKSUM_PARTIAL;

Regards

--
Julian Anastasov <ja@....bg>
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