diff options
Diffstat (limited to 'net/ipv6/netfilter.c')
| -rw-r--r-- | net/ipv6/netfilter.c | 29 |
1 files changed, 26 insertions, 3 deletions
diff --git a/net/ipv6/netfilter.c b/net/ipv6/netfilter.c index db31561cc8d..d38e6a8d8b9 100644 --- a/net/ipv6/netfilter.c +++ b/net/ipv6/netfilter.c @@ -1,9 +1,16 @@ +/* + * IPv6 specific functions of netfilter core + * + * Rusty Russell (C) 2000 -- This code is GPL. + * Patrick McHardy (C) 2006-2012 + */ #include <linux/kernel.h> #include <linux/init.h> #include <linux/ipv6.h> #include <linux/netfilter.h> #include <linux/netfilter_ipv6.h> #include <linux/export.h> +#include <net/addrconf.h> #include <net/dst.h> #include <net/ipv6.h> #include <net/ip6_route.h> @@ -15,6 +22,7 @@ int ip6_route_me_harder(struct sk_buff *skb) { struct net *net = dev_net(skb_dst(skb)->dev); const struct ipv6hdr *iph = ipv6_hdr(skb); + unsigned int hh_len; struct dst_entry *dst; struct flowi6 fl6 = { .flowi6_oif = skb->sk ? skb->sk->sk_bound_dev_if : 0, @@ -22,13 +30,15 @@ int ip6_route_me_harder(struct sk_buff *skb) .daddr = iph->daddr, .saddr = iph->saddr, }; + int err; dst = ip6_route_output(net, skb->sk, &fl6); - if (dst->error) { + err = dst->error; + if (err) { IP6_INC_STATS(net, ip6_dst_idev(dst), IPSTATS_MIB_OUTNOROUTES); LIMIT_NETDEBUG(KERN_DEBUG "ip6_route_me_harder: No more route.\n"); dst_release(dst); - return -EINVAL; + return err; } /* Drop old route. */ @@ -42,11 +52,18 @@ int ip6_route_me_harder(struct sk_buff *skb) skb_dst_set(skb, NULL); dst = xfrm_lookup(net, dst, flowi6_to_flowi(&fl6), skb->sk, 0); if (IS_ERR(dst)) - return -1; + return PTR_ERR(dst); skb_dst_set(skb, dst); } #endif + /* Change in oif may mean change in hh_len. */ + hh_len = skb_dst(skb)->dev->hard_header_len; + if (skb_headroom(skb) < hh_len && + pskb_expand_head(skb, HH_DATA_ALIGN(hh_len - skb_headroom(skb)), + 0, GFP_ATOMIC)) + return -ENOMEM; + return 0; } EXPORT_SYMBOL(ip6_route_me_harder); @@ -172,6 +189,10 @@ static __sum16 nf_ip6_checksum_partial(struct sk_buff *skb, unsigned int hook, return csum; }; +static const struct nf_ipv6_ops ipv6ops = { + .chk_addr = ipv6_chk_addr, +}; + static const struct nf_afinfo nf_ip6_afinfo = { .family = AF_INET6, .checksum = nf_ip6_checksum, @@ -184,6 +205,7 @@ static const struct nf_afinfo nf_ip6_afinfo = { int __init ipv6_netfilter_init(void) { + RCU_INIT_POINTER(nf_ipv6_ops, &ipv6ops); return nf_register_afinfo(&nf_ip6_afinfo); } @@ -192,5 +214,6 @@ int __init ipv6_netfilter_init(void) */ void ipv6_netfilter_fini(void) { + RCU_INIT_POINTER(nf_ipv6_ops, NULL); nf_unregister_afinfo(&nf_ip6_afinfo); } |