diff options
Diffstat (limited to 'net/ipv6')
| -rw-r--r-- | net/ipv6/netfilter.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/net/ipv6/netfilter.c b/net/ipv6/netfilter.c index f514a0113b9f..3e9ecfaf67e2 100644 --- a/net/ipv6/netfilter.c +++ b/net/ipv6/netfilter.c @@ -79,8 +79,42 @@ static int nf_ip6_reroute(struct sk_buff **pskb, const struct nf_info *info) return 0; } +unsigned int nf_ip6_checksum(struct sk_buff *skb, unsigned int hook, + unsigned int dataoff, u_int8_t protocol) +{ + struct ipv6hdr *ip6h = skb->nh.ipv6h; + unsigned int csum = 0; + + switch (skb->ip_summed) { + case CHECKSUM_HW: + if (hook != NF_IP6_PRE_ROUTING && hook != NF_IP6_LOCAL_IN) + break; + if (!csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr, + skb->len - dataoff, protocol, + csum_sub(skb->csum, + skb_checksum(skb, 0, + dataoff, 0)))) { + skb->ip_summed = CHECKSUM_UNNECESSARY; + break; + } + /* fall through */ + case CHECKSUM_NONE: + skb->csum = ~csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr, + skb->len - dataoff, + protocol, + csum_sub(0, + skb_checksum(skb, 0, + dataoff, 0))); + csum = __skb_checksum_complete(skb); + } + return csum; +} + +EXPORT_SYMBOL(nf_ip6_checksum); + static struct nf_afinfo nf_ip6_afinfo = { .family = AF_INET6, + .checksum = nf_ip6_checksum, .saveroute = nf_ip6_saveroute, .reroute = nf_ip6_reroute, .route_key_size = sizeof(struct ip6_rt_info), |
