diff options
Diffstat (limited to 'net/ipv6')
| -rw-r--r-- | net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c | 27 |
1 files changed, 16 insertions, 11 deletions
diff --git a/net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c b/net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c index b5c4bb54691e..9b7eaaadc67e 100644 --- a/net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c +++ b/net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c @@ -86,7 +86,7 @@ static int ipv6_print_conntrack(struct seq_file *s, * - Note also special handling of AUTH header. Thanks to IPsec wizards. */ -int nf_ct_ipv6_skip_exthdr(struct sk_buff *skb, int start, u8 *nexthdrp, +int nf_ct_ipv6_skip_exthdr(const struct sk_buff *skb, int start, u8 *nexthdrp, int len) { u8 nexthdr = *nexthdrp; @@ -117,19 +117,24 @@ int nf_ct_ipv6_skip_exthdr(struct sk_buff *skb, int start, u8 *nexthdrp, return start; } -static int -ipv6_prepare(struct sk_buff **pskb, unsigned int hooknum, unsigned int *dataoff, - u_int8_t *protonum) +static int ipv6_get_l4proto(const struct sk_buff *skb, unsigned int nhoff, + unsigned int *dataoff, u_int8_t *protonum) { - unsigned int extoff = (u8 *)(ipv6_hdr(*pskb) + 1) - (*pskb)->data; - unsigned char pnum = ipv6_hdr(*pskb)->nexthdr; - int protoff = nf_ct_ipv6_skip_exthdr(*pskb, extoff, &pnum, - (*pskb)->len - extoff); + unsigned int extoff = nhoff + sizeof(struct ipv6hdr); + unsigned char pnum; + int protoff; + + if (skb_copy_bits(skb, nhoff + offsetof(struct ipv6hdr, nexthdr), + &pnum, sizeof(pnum)) != 0) { + pr_debug("ip6_conntrack_core: can't get nexthdr\n"); + return -NF_ACCEPT; + } + protoff = nf_ct_ipv6_skip_exthdr(skb, extoff, &pnum, skb->len - extoff); /* - * (protoff == (*pskb)->len) mean that the packet doesn't have no data + * (protoff == skb->len) mean that the packet doesn't have no data * except of IPv6 & ext headers. but it's tracked anyway. - YK */ - if ((protoff < 0) || (protoff > (*pskb)->len)) { + if ((protoff < 0) || (protoff > skb->len)) { pr_debug("ip6_conntrack_core: can't find proto in pkt\n"); return -NF_ACCEPT; } @@ -375,7 +380,7 @@ struct nf_conntrack_l3proto nf_conntrack_l3proto_ipv6 = { .invert_tuple = ipv6_invert_tuple, .print_tuple = ipv6_print_tuple, .print_conntrack = ipv6_print_conntrack, - .prepare = ipv6_prepare, + .get_l4proto = ipv6_get_l4proto, #if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE) .tuple_to_nfattr = ipv6_tuple_to_nfattr, .nfattr_to_tuple = ipv6_nfattr_to_tuple, |