diff options
Diffstat (limited to 'net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c')
| -rw-r--r-- | net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c | 25 |
1 files changed, 15 insertions, 10 deletions
diff --git a/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c b/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c index 3c5629938487..64552afd01cb 100644 --- a/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c +++ b/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c @@ -78,21 +78,26 @@ nf_ct_ipv4_gather_frags(struct sk_buff *skb, u_int32_t user) return skb; } -static int -ipv4_prepare(struct sk_buff **pskb, unsigned int hooknum, unsigned int *dataoff, - u_int8_t *protonum) +static int ipv4_get_l4proto(const struct sk_buff *skb, unsigned int nhoff, + unsigned int *dataoff, u_int8_t *protonum) { + struct iphdr _iph, *iph; + + iph = skb_header_pointer(skb, nhoff, sizeof(_iph), &_iph); + if (iph == NULL) + return -NF_DROP; + /* Never happen */ - if (ip_hdr(*pskb)->frag_off & htons(IP_OFFSET)) { + if (iph->frag_off & htons(IP_OFFSET)) { if (net_ratelimit()) { - printk(KERN_ERR "ipv4_prepare: Frag of proto %u (hook=%u)\n", - ip_hdr(*pskb)->protocol, hooknum); + printk(KERN_ERR "ipv4_get_l4proto: Frag of proto %u\n", + iph->protocol); } return -NF_DROP; } - *dataoff = skb_network_offset(*pskb) + ip_hdrlen(*pskb); - *protonum = ip_hdr(*pskb)->protocol; + *dataoff = nhoff + (iph->ihl << 2); + *protonum = iph->protocol; return NF_ACCEPT; } @@ -400,14 +405,14 @@ static struct nf_sockopt_ops so_getorigdst = { .get = &getorigdst, }; -struct nf_conntrack_l3proto nf_conntrack_l3proto_ipv4 = { +struct nf_conntrack_l3proto nf_conntrack_l3proto_ipv4 __read_mostly = { .l3proto = PF_INET, .name = "ipv4", .pkt_to_tuple = ipv4_pkt_to_tuple, .invert_tuple = ipv4_invert_tuple, .print_tuple = ipv4_print_tuple, .print_conntrack = ipv4_print_conntrack, - .prepare = ipv4_prepare, + .get_l4proto = ipv4_get_l4proto, #if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE) .tuple_to_nfattr = ipv4_tuple_to_nfattr, .nfattr_to_tuple = ipv4_nfattr_to_tuple, |