Harald Welte | 2cc7d57 | 2005-08-09 19:42:34 -0700 | [diff] [blame] | 1 | /* IPv4 specific functions of netfilter core */ |
Harald Welte | 020b4c1 | 2005-08-09 19:39:00 -0700 | [diff] [blame] | 2 | #include <linux/kernel.h> |
| 3 | #include <linux/netfilter.h> |
Harald Welte | 2cc7d57 | 2005-08-09 19:42:34 -0700 | [diff] [blame] | 4 | #include <linux/netfilter_ipv4.h> |
Patrick McHardy | 3e3850e | 2006-01-06 23:04:54 -0800 | [diff] [blame] | 5 | #include <linux/ip.h> |
Herbert Xu | 2ca7b0a | 2007-10-14 00:39:55 -0700 | [diff] [blame] | 6 | #include <linux/skbuff.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 7 | #include <linux/gfp.h> |
Harald Welte | 020b4c1 | 2005-08-09 19:39:00 -0700 | [diff] [blame] | 8 | #include <net/route.h> |
Patrick McHardy | 3e3850e | 2006-01-06 23:04:54 -0800 | [diff] [blame] | 9 | #include <net/xfrm.h> |
| 10 | #include <net/ip.h> |
Patrick McHardy | c01cd42 | 2007-12-05 01:24:48 -0800 | [diff] [blame] | 11 | #include <net/netfilter/nf_queue.h> |
Harald Welte | 020b4c1 | 2005-08-09 19:39:00 -0700 | [diff] [blame] | 12 | |
| 13 | /* route_me_harder function, used by iptable_nat, iptable_mangle + ip_queue */ |
Herbert Xu | 3db05fe | 2007-10-15 00:53:15 -0700 | [diff] [blame] | 14 | int ip_route_me_harder(struct sk_buff *skb, unsigned addr_type) |
Harald Welte | 020b4c1 | 2005-08-09 19:39:00 -0700 | [diff] [blame] | 15 | { |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 16 | struct net *net = dev_net(skb_dst(skb)->dev); |
Herbert Xu | 3db05fe | 2007-10-15 00:53:15 -0700 | [diff] [blame] | 17 | const struct iphdr *iph = ip_hdr(skb); |
Harald Welte | 020b4c1 | 2005-08-09 19:39:00 -0700 | [diff] [blame] | 18 | struct rtable *rt; |
| 19 | struct flowi fl = {}; |
| 20 | struct dst_entry *odst; |
| 21 | unsigned int hh_len; |
Patrick McHardy | c68b8b6 | 2007-01-04 12:15:34 -0800 | [diff] [blame] | 22 | unsigned int type; |
Harald Welte | 020b4c1 | 2005-08-09 19:39:00 -0700 | [diff] [blame] | 23 | |
Alexey Dobriyan | b21f890 | 2008-10-08 11:35:03 +0200 | [diff] [blame] | 24 | type = inet_addr_type(net, iph->saddr); |
KOVACS Krisztian | 86b08d8 | 2008-10-01 07:44:42 -0700 | [diff] [blame] | 25 | if (skb->sk && inet_sk(skb->sk)->transparent) |
| 26 | type = RTN_LOCAL; |
Simon Horman | b4c4ed1 | 2006-10-02 16:11:13 -0700 | [diff] [blame] | 27 | if (addr_type == RTN_UNSPEC) |
Patrick McHardy | c68b8b6 | 2007-01-04 12:15:34 -0800 | [diff] [blame] | 28 | addr_type = type; |
Simon Horman | b4c4ed1 | 2006-10-02 16:11:13 -0700 | [diff] [blame] | 29 | |
Harald Welte | 020b4c1 | 2005-08-09 19:39:00 -0700 | [diff] [blame] | 30 | /* some non-standard hacks like ipt_REJECT.c:send_reset() can cause |
Patrick McHardy | 6e23ae2 | 2007-11-19 18:53:30 -0800 | [diff] [blame] | 31 | * packets with foreign saddr to appear on the NF_INET_LOCAL_OUT hook. |
Harald Welte | 020b4c1 | 2005-08-09 19:39:00 -0700 | [diff] [blame] | 32 | */ |
Simon Horman | b4c4ed1 | 2006-10-02 16:11:13 -0700 | [diff] [blame] | 33 | if (addr_type == RTN_LOCAL) { |
Harald Welte | 020b4c1 | 2005-08-09 19:39:00 -0700 | [diff] [blame] | 34 | fl.nl_u.ip4_u.daddr = iph->daddr; |
Patrick McHardy | c68b8b6 | 2007-01-04 12:15:34 -0800 | [diff] [blame] | 35 | if (type == RTN_LOCAL) |
| 36 | fl.nl_u.ip4_u.saddr = iph->saddr; |
Harald Welte | 020b4c1 | 2005-08-09 19:39:00 -0700 | [diff] [blame] | 37 | fl.nl_u.ip4_u.tos = RT_TOS(iph->tos); |
Herbert Xu | 3db05fe | 2007-10-15 00:53:15 -0700 | [diff] [blame] | 38 | fl.oif = skb->sk ? skb->sk->sk_bound_dev_if : 0; |
| 39 | fl.mark = skb->mark; |
KOVACS Krisztian | 86b08d8 | 2008-10-01 07:44:42 -0700 | [diff] [blame] | 40 | fl.flags = skb->sk ? inet_sk_flowi_flags(skb->sk) : 0; |
Alexey Dobriyan | b21f890 | 2008-10-08 11:35:03 +0200 | [diff] [blame] | 41 | if (ip_route_output_key(net, &rt, &fl) != 0) |
Harald Welte | 020b4c1 | 2005-08-09 19:39:00 -0700 | [diff] [blame] | 42 | return -1; |
| 43 | |
| 44 | /* Drop old route. */ |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 45 | skb_dst_drop(skb); |
| 46 | skb_dst_set(skb, &rt->u.dst); |
Harald Welte | 020b4c1 | 2005-08-09 19:39:00 -0700 | [diff] [blame] | 47 | } else { |
| 48 | /* non-local src, find valid iif to satisfy |
| 49 | * rp-filter when calling ip_route_input. */ |
| 50 | fl.nl_u.ip4_u.daddr = iph->saddr; |
Alexey Dobriyan | b21f890 | 2008-10-08 11:35:03 +0200 | [diff] [blame] | 51 | if (ip_route_output_key(net, &rt, &fl) != 0) |
Harald Welte | 020b4c1 | 2005-08-09 19:39:00 -0700 | [diff] [blame] | 52 | return -1; |
| 53 | |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 54 | odst = skb_dst(skb); |
Herbert Xu | 3db05fe | 2007-10-15 00:53:15 -0700 | [diff] [blame] | 55 | if (ip_route_input(skb, iph->daddr, iph->saddr, |
Harald Welte | 020b4c1 | 2005-08-09 19:39:00 -0700 | [diff] [blame] | 56 | RT_TOS(iph->tos), rt->u.dst.dev) != 0) { |
| 57 | dst_release(&rt->u.dst); |
| 58 | return -1; |
| 59 | } |
| 60 | dst_release(&rt->u.dst); |
| 61 | dst_release(odst); |
| 62 | } |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 63 | |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 64 | if (skb_dst(skb)->error) |
Harald Welte | 020b4c1 | 2005-08-09 19:39:00 -0700 | [diff] [blame] | 65 | return -1; |
| 66 | |
Patrick McHardy | 3e3850e | 2006-01-06 23:04:54 -0800 | [diff] [blame] | 67 | #ifdef CONFIG_XFRM |
Herbert Xu | 3db05fe | 2007-10-15 00:53:15 -0700 | [diff] [blame] | 68 | if (!(IPCB(skb)->flags & IPSKB_XFRM_TRANSFORMED) && |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 69 | xfrm_decode_session(skb, &fl, AF_INET) == 0) { |
| 70 | struct dst_entry *dst = skb_dst(skb); |
| 71 | skb_dst_set(skb, NULL); |
| 72 | if (xfrm_lookup(net, &dst, &fl, skb->sk, 0)) |
Patrick McHardy | 3e3850e | 2006-01-06 23:04:54 -0800 | [diff] [blame] | 73 | return -1; |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 74 | skb_dst_set(skb, dst); |
| 75 | } |
Patrick McHardy | 3e3850e | 2006-01-06 23:04:54 -0800 | [diff] [blame] | 76 | #endif |
| 77 | |
Harald Welte | 020b4c1 | 2005-08-09 19:39:00 -0700 | [diff] [blame] | 78 | /* Change in oif may mean change in hh_len. */ |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 79 | hh_len = skb_dst(skb)->dev->hard_header_len; |
Herbert Xu | 3db05fe | 2007-10-15 00:53:15 -0700 | [diff] [blame] | 80 | if (skb_headroom(skb) < hh_len && |
| 81 | pskb_expand_head(skb, hh_len - skb_headroom(skb), 0, GFP_ATOMIC)) |
Herbert Xu | 2ca7b0a | 2007-10-14 00:39:55 -0700 | [diff] [blame] | 82 | return -1; |
Harald Welte | 020b4c1 | 2005-08-09 19:39:00 -0700 | [diff] [blame] | 83 | |
| 84 | return 0; |
| 85 | } |
| 86 | EXPORT_SYMBOL(ip_route_me_harder); |
Harald Welte | 2cc7d57 | 2005-08-09 19:42:34 -0700 | [diff] [blame] | 87 | |
Patrick McHardy | ee68cea | 2006-02-15 01:34:23 -0800 | [diff] [blame] | 88 | #ifdef CONFIG_XFRM |
Herbert Xu | 3db05fe | 2007-10-15 00:53:15 -0700 | [diff] [blame] | 89 | int ip_xfrm_me_harder(struct sk_buff *skb) |
Patrick McHardy | ee68cea | 2006-02-15 01:34:23 -0800 | [diff] [blame] | 90 | { |
| 91 | struct flowi fl; |
| 92 | unsigned int hh_len; |
| 93 | struct dst_entry *dst; |
| 94 | |
Herbert Xu | 3db05fe | 2007-10-15 00:53:15 -0700 | [diff] [blame] | 95 | if (IPCB(skb)->flags & IPSKB_XFRM_TRANSFORMED) |
Patrick McHardy | ee68cea | 2006-02-15 01:34:23 -0800 | [diff] [blame] | 96 | return 0; |
Herbert Xu | 3db05fe | 2007-10-15 00:53:15 -0700 | [diff] [blame] | 97 | if (xfrm_decode_session(skb, &fl, AF_INET) < 0) |
Patrick McHardy | ee68cea | 2006-02-15 01:34:23 -0800 | [diff] [blame] | 98 | return -1; |
| 99 | |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 100 | dst = skb_dst(skb); |
Patrick McHardy | ee68cea | 2006-02-15 01:34:23 -0800 | [diff] [blame] | 101 | if (dst->xfrm) |
| 102 | dst = ((struct xfrm_dst *)dst)->route; |
| 103 | dst_hold(dst); |
| 104 | |
Alexey Dobriyan | 52479b6 | 2008-11-25 17:35:18 -0800 | [diff] [blame] | 105 | if (xfrm_lookup(dev_net(dst->dev), &dst, &fl, skb->sk, 0) < 0) |
Patrick McHardy | ee68cea | 2006-02-15 01:34:23 -0800 | [diff] [blame] | 106 | return -1; |
| 107 | |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 108 | skb_dst_drop(skb); |
| 109 | skb_dst_set(skb, dst); |
Patrick McHardy | ee68cea | 2006-02-15 01:34:23 -0800 | [diff] [blame] | 110 | |
| 111 | /* Change in oif may mean change in hh_len. */ |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 112 | hh_len = skb_dst(skb)->dev->hard_header_len; |
Herbert Xu | 3db05fe | 2007-10-15 00:53:15 -0700 | [diff] [blame] | 113 | if (skb_headroom(skb) < hh_len && |
| 114 | pskb_expand_head(skb, hh_len - skb_headroom(skb), 0, GFP_ATOMIC)) |
Herbert Xu | 2ca7b0a | 2007-10-14 00:39:55 -0700 | [diff] [blame] | 115 | return -1; |
Patrick McHardy | ee68cea | 2006-02-15 01:34:23 -0800 | [diff] [blame] | 116 | return 0; |
| 117 | } |
| 118 | EXPORT_SYMBOL(ip_xfrm_me_harder); |
| 119 | #endif |
| 120 | |
Patrick McHardy | eb9c7eb | 2006-01-06 23:06:30 -0800 | [diff] [blame] | 121 | void (*ip_nat_decode_session)(struct sk_buff *, struct flowi *); |
| 122 | EXPORT_SYMBOL(ip_nat_decode_session); |
| 123 | |
Harald Welte | 2cc7d57 | 2005-08-09 19:42:34 -0700 | [diff] [blame] | 124 | /* |
| 125 | * Extra routing may needed on local out, as the QUEUE target never |
| 126 | * returns control to the table. |
| 127 | */ |
| 128 | |
| 129 | struct ip_rt_info { |
Al Viro | 59b8bfd | 2006-09-28 14:21:07 -0700 | [diff] [blame] | 130 | __be32 daddr; |
| 131 | __be32 saddr; |
Harald Welte | 2cc7d57 | 2005-08-09 19:42:34 -0700 | [diff] [blame] | 132 | u_int8_t tos; |
Eric Leblond | 5f145e4 | 2008-11-25 12:15:16 +0100 | [diff] [blame] | 133 | u_int32_t mark; |
Harald Welte | 2cc7d57 | 2005-08-09 19:42:34 -0700 | [diff] [blame] | 134 | }; |
| 135 | |
Patrick McHardy | 02f014d | 2007-12-05 01:26:33 -0800 | [diff] [blame] | 136 | static void nf_ip_saveroute(const struct sk_buff *skb, |
| 137 | struct nf_queue_entry *entry) |
Harald Welte | 2cc7d57 | 2005-08-09 19:42:34 -0700 | [diff] [blame] | 138 | { |
Patrick McHardy | 02f014d | 2007-12-05 01:26:33 -0800 | [diff] [blame] | 139 | struct ip_rt_info *rt_info = nf_queue_entry_reroute(entry); |
Harald Welte | 2cc7d57 | 2005-08-09 19:42:34 -0700 | [diff] [blame] | 140 | |
Patrick McHardy | 02f014d | 2007-12-05 01:26:33 -0800 | [diff] [blame] | 141 | if (entry->hook == NF_INET_LOCAL_OUT) { |
Arnaldo Carvalho de Melo | eddc9ec | 2007-04-20 22:47:35 -0700 | [diff] [blame] | 142 | const struct iphdr *iph = ip_hdr(skb); |
Harald Welte | 2cc7d57 | 2005-08-09 19:42:34 -0700 | [diff] [blame] | 143 | |
| 144 | rt_info->tos = iph->tos; |
| 145 | rt_info->daddr = iph->daddr; |
| 146 | rt_info->saddr = iph->saddr; |
Eric Leblond | 5f145e4 | 2008-11-25 12:15:16 +0100 | [diff] [blame] | 147 | rt_info->mark = skb->mark; |
Harald Welte | 2cc7d57 | 2005-08-09 19:42:34 -0700 | [diff] [blame] | 148 | } |
| 149 | } |
| 150 | |
Patrick McHardy | 02f014d | 2007-12-05 01:26:33 -0800 | [diff] [blame] | 151 | static int nf_ip_reroute(struct sk_buff *skb, |
| 152 | const struct nf_queue_entry *entry) |
Harald Welte | 2cc7d57 | 2005-08-09 19:42:34 -0700 | [diff] [blame] | 153 | { |
Patrick McHardy | 02f014d | 2007-12-05 01:26:33 -0800 | [diff] [blame] | 154 | const struct ip_rt_info *rt_info = nf_queue_entry_reroute(entry); |
Harald Welte | 2cc7d57 | 2005-08-09 19:42:34 -0700 | [diff] [blame] | 155 | |
Patrick McHardy | 02f014d | 2007-12-05 01:26:33 -0800 | [diff] [blame] | 156 | if (entry->hook == NF_INET_LOCAL_OUT) { |
Herbert Xu | 3db05fe | 2007-10-15 00:53:15 -0700 | [diff] [blame] | 157 | const struct iphdr *iph = ip_hdr(skb); |
Harald Welte | 2cc7d57 | 2005-08-09 19:42:34 -0700 | [diff] [blame] | 158 | |
Joe Perches | f64f9e7 | 2009-11-29 16:55:45 -0800 | [diff] [blame] | 159 | if (!(iph->tos == rt_info->tos && |
| 160 | skb->mark == rt_info->mark && |
| 161 | iph->daddr == rt_info->daddr && |
| 162 | iph->saddr == rt_info->saddr)) |
Herbert Xu | 3db05fe | 2007-10-15 00:53:15 -0700 | [diff] [blame] | 163 | return ip_route_me_harder(skb, RTN_UNSPEC); |
Harald Welte | 2cc7d57 | 2005-08-09 19:42:34 -0700 | [diff] [blame] | 164 | } |
| 165 | return 0; |
| 166 | } |
| 167 | |
Al Viro | b51655b | 2006-11-14 21:40:42 -0800 | [diff] [blame] | 168 | __sum16 nf_ip_checksum(struct sk_buff *skb, unsigned int hook, |
Patrick McHardy | 422c346 | 2006-04-06 14:18:43 -0700 | [diff] [blame] | 169 | unsigned int dataoff, u_int8_t protocol) |
| 170 | { |
Arnaldo Carvalho de Melo | eddc9ec | 2007-04-20 22:47:35 -0700 | [diff] [blame] | 171 | const struct iphdr *iph = ip_hdr(skb); |
Al Viro | b51655b | 2006-11-14 21:40:42 -0800 | [diff] [blame] | 172 | __sum16 csum = 0; |
Patrick McHardy | 422c346 | 2006-04-06 14:18:43 -0700 | [diff] [blame] | 173 | |
| 174 | switch (skb->ip_summed) { |
Patrick McHardy | 84fa793 | 2006-08-29 16:44:56 -0700 | [diff] [blame] | 175 | case CHECKSUM_COMPLETE: |
Patrick McHardy | 6e23ae2 | 2007-11-19 18:53:30 -0800 | [diff] [blame] | 176 | if (hook != NF_INET_PRE_ROUTING && hook != NF_INET_LOCAL_IN) |
Patrick McHardy | 422c346 | 2006-04-06 14:18:43 -0700 | [diff] [blame] | 177 | break; |
Al Viro | d3bc23e | 2006-11-14 21:24:49 -0800 | [diff] [blame] | 178 | if ((protocol == 0 && !csum_fold(skb->csum)) || |
Patrick McHardy | 422c346 | 2006-04-06 14:18:43 -0700 | [diff] [blame] | 179 | !csum_tcpudp_magic(iph->saddr, iph->daddr, |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 180 | skb->len - dataoff, protocol, |
Patrick McHardy | 422c346 | 2006-04-06 14:18:43 -0700 | [diff] [blame] | 181 | skb->csum)) { |
| 182 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
| 183 | break; |
| 184 | } |
| 185 | /* fall through */ |
| 186 | case CHECKSUM_NONE: |
| 187 | if (protocol == 0) |
| 188 | skb->csum = 0; |
| 189 | else |
| 190 | skb->csum = csum_tcpudp_nofold(iph->saddr, iph->daddr, |
| 191 | skb->len - dataoff, |
| 192 | protocol, 0); |
| 193 | csum = __skb_checksum_complete(skb); |
| 194 | } |
| 195 | return csum; |
| 196 | } |
Patrick McHardy | 422c346 | 2006-04-06 14:18:43 -0700 | [diff] [blame] | 197 | EXPORT_SYMBOL(nf_ip_checksum); |
| 198 | |
Patrick McHardy | d63a650 | 2008-03-20 15:15:53 +0100 | [diff] [blame] | 199 | static __sum16 nf_ip_checksum_partial(struct sk_buff *skb, unsigned int hook, |
| 200 | unsigned int dataoff, unsigned int len, |
| 201 | u_int8_t protocol) |
| 202 | { |
| 203 | const struct iphdr *iph = ip_hdr(skb); |
| 204 | __sum16 csum = 0; |
| 205 | |
| 206 | switch (skb->ip_summed) { |
| 207 | case CHECKSUM_COMPLETE: |
| 208 | if (len == skb->len - dataoff) |
| 209 | return nf_ip_checksum(skb, hook, dataoff, protocol); |
| 210 | /* fall through */ |
| 211 | case CHECKSUM_NONE: |
| 212 | skb->csum = csum_tcpudp_nofold(iph->saddr, iph->daddr, protocol, |
| 213 | skb->len - dataoff, 0); |
| 214 | skb->ip_summed = CHECKSUM_NONE; |
| 215 | csum = __skb_checksum_complete_head(skb, dataoff + len); |
| 216 | if (!csum) |
| 217 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
| 218 | } |
| 219 | return csum; |
| 220 | } |
| 221 | |
Patrick McHardy | 1841a4c | 2007-12-05 01:22:05 -0800 | [diff] [blame] | 222 | static int nf_ip_route(struct dst_entry **dst, struct flowi *fl) |
| 223 | { |
Denis V. Lunev | f206351 | 2008-01-22 22:07:34 -0800 | [diff] [blame] | 224 | return ip_route_output_key(&init_net, (struct rtable **)dst, fl); |
Patrick McHardy | 1841a4c | 2007-12-05 01:22:05 -0800 | [diff] [blame] | 225 | } |
| 226 | |
Patrick McHardy | 1e796fd | 2007-12-17 22:42:27 -0800 | [diff] [blame] | 227 | static const struct nf_afinfo nf_ip_afinfo = { |
Patrick McHardy | d63a650 | 2008-03-20 15:15:53 +0100 | [diff] [blame] | 228 | .family = AF_INET, |
| 229 | .checksum = nf_ip_checksum, |
| 230 | .checksum_partial = nf_ip_checksum_partial, |
| 231 | .route = nf_ip_route, |
| 232 | .saveroute = nf_ip_saveroute, |
| 233 | .reroute = nf_ip_reroute, |
| 234 | .route_key_size = sizeof(struct ip_rt_info), |
Harald Welte | 2cc7d57 | 2005-08-09 19:42:34 -0700 | [diff] [blame] | 235 | }; |
| 236 | |
Andrew Morton | 65b4b4e | 2006-03-28 16:37:06 -0800 | [diff] [blame] | 237 | static int ipv4_netfilter_init(void) |
Harald Welte | 2cc7d57 | 2005-08-09 19:42:34 -0700 | [diff] [blame] | 238 | { |
Patrick McHardy | bce8032 | 2006-04-06 14:18:09 -0700 | [diff] [blame] | 239 | return nf_register_afinfo(&nf_ip_afinfo); |
Harald Welte | 2cc7d57 | 2005-08-09 19:42:34 -0700 | [diff] [blame] | 240 | } |
| 241 | |
Andrew Morton | 65b4b4e | 2006-03-28 16:37:06 -0800 | [diff] [blame] | 242 | static void ipv4_netfilter_fini(void) |
Harald Welte | 2cc7d57 | 2005-08-09 19:42:34 -0700 | [diff] [blame] | 243 | { |
Patrick McHardy | bce8032 | 2006-04-06 14:18:09 -0700 | [diff] [blame] | 244 | nf_unregister_afinfo(&nf_ip_afinfo); |
Harald Welte | 2cc7d57 | 2005-08-09 19:42:34 -0700 | [diff] [blame] | 245 | } |
| 246 | |
Andrew Morton | 65b4b4e | 2006-03-28 16:37:06 -0800 | [diff] [blame] | 247 | module_init(ipv4_netfilter_init); |
| 248 | module_exit(ipv4_netfilter_fini); |
Patrick McHardy | 4f53652 | 2008-01-14 23:48:39 -0800 | [diff] [blame] | 249 | |
| 250 | #ifdef CONFIG_SYSCTL |
| 251 | struct ctl_path nf_net_ipv4_netfilter_sysctl_path[] = { |
Eric W. Biederman | f8572d8 | 2009-11-05 13:32:03 -0800 | [diff] [blame] | 252 | { .procname = "net", }, |
| 253 | { .procname = "ipv4", }, |
| 254 | { .procname = "netfilter", }, |
Patrick McHardy | 4f53652 | 2008-01-14 23:48:39 -0800 | [diff] [blame] | 255 | { } |
| 256 | }; |
| 257 | EXPORT_SYMBOL_GPL(nf_net_ipv4_netfilter_sysctl_path); |
| 258 | #endif /* CONFIG_SYSCTL */ |