Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * net/sched/ipt.c iptables target interface |
| 3 | * |
| 4 | *TODO: Add other tables. For now we only support the ipv4 table targets |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU General Public License |
| 8 | * as published by the Free Software Foundation; either version |
| 9 | * 2 of the License, or (at your option) any later version. |
| 10 | * |
| 11 | * Copyright: Jamal Hadi Salim (2002-4) |
| 12 | */ |
| 13 | |
| 14 | #include <asm/uaccess.h> |
| 15 | #include <asm/system.h> |
| 16 | #include <asm/bitops.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | #include <linux/types.h> |
| 18 | #include <linux/kernel.h> |
| 19 | #include <linux/sched.h> |
| 20 | #include <linux/string.h> |
| 21 | #include <linux/mm.h> |
| 22 | #include <linux/socket.h> |
| 23 | #include <linux/sockios.h> |
| 24 | #include <linux/in.h> |
| 25 | #include <linux/errno.h> |
| 26 | #include <linux/interrupt.h> |
| 27 | #include <linux/netdevice.h> |
| 28 | #include <linux/skbuff.h> |
| 29 | #include <linux/rtnetlink.h> |
| 30 | #include <linux/module.h> |
| 31 | #include <linux/init.h> |
| 32 | #include <linux/proc_fs.h> |
| 33 | #include <linux/kmod.h> |
| 34 | #include <net/sock.h> |
| 35 | #include <net/pkt_sched.h> |
| 36 | #include <linux/tc_act/tc_ipt.h> |
| 37 | #include <net/tc_act/tc_ipt.h> |
| 38 | |
| 39 | #include <linux/netfilter_ipv4/ip_tables.h> |
| 40 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 42 | #define IPT_TAB_MASK 15 |
| 43 | static struct tcf_common *tcf_ipt_ht[IPT_TAB_MASK + 1]; |
| 44 | static u32 ipt_idx_gen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | static DEFINE_RWLOCK(ipt_lock); |
| 46 | |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 47 | static struct tcf_hashinfo ipt_hash_info = { |
| 48 | .htab = tcf_ipt_ht, |
| 49 | .hmask = IPT_TAB_MASK, |
| 50 | .lock = &ipt_lock, |
| 51 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 53 | static int ipt_init_target(struct ipt_entry_target *t, char *table, unsigned int hook) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | { |
| 55 | struct ipt_target *target; |
| 56 | int ret = 0; |
| 57 | |
Patrick McHardy | 239a87c | 2007-02-02 00:40:36 -0800 | [diff] [blame] | 58 | target = xt_request_find_target(AF_INET, t->u.user.name, |
| 59 | t->u.user.revision); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | if (!target) |
| 61 | return -ENOENT; |
| 62 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | t->u.kernel.target = target; |
| 64 | |
Patrick McHardy | 18118cd | 2006-04-24 17:18:59 -0700 | [diff] [blame] | 65 | ret = xt_check_target(target, AF_INET, t->u.target_size - sizeof(*t), |
| 66 | table, hook, 0, 0); |
Patrick McHardy | 239a87c | 2007-02-02 00:40:36 -0800 | [diff] [blame] | 67 | if (ret) { |
| 68 | module_put(t->u.kernel.target->me); |
Patrick McHardy | 18118cd | 2006-04-24 17:18:59 -0700 | [diff] [blame] | 69 | return ret; |
Patrick McHardy | 239a87c | 2007-02-02 00:40:36 -0800 | [diff] [blame] | 70 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | if (t->u.kernel.target->checkentry |
Patrick McHardy | 1c52483 | 2006-03-20 18:02:15 -0800 | [diff] [blame] | 72 | && !t->u.kernel.target->checkentry(table, NULL, |
| 73 | t->u.kernel.target, t->data, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | hook)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | module_put(t->u.kernel.target->me); |
| 76 | ret = -EINVAL; |
| 77 | } |
| 78 | |
| 79 | return ret; |
| 80 | } |
| 81 | |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 82 | static void ipt_destroy_target(struct ipt_entry_target *t) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | { |
| 84 | if (t->u.kernel.target->destroy) |
Patrick McHardy | efa7416 | 2006-08-22 00:36:37 -0700 | [diff] [blame] | 85 | t->u.kernel.target->destroy(t->u.kernel.target, t->data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | module_put(t->u.kernel.target->me); |
| 87 | } |
| 88 | |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 89 | static int tcf_ipt_release(struct tcf_ipt *ipt, int bind) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | { |
| 91 | int ret = 0; |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 92 | if (ipt) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | if (bind) |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 94 | ipt->tcf_bindcnt--; |
| 95 | ipt->tcf_refcnt--; |
| 96 | if (ipt->tcf_bindcnt <= 0 && ipt->tcf_refcnt <= 0) { |
| 97 | ipt_destroy_target(ipt->tcfi_t); |
| 98 | kfree(ipt->tcfi_tname); |
| 99 | kfree(ipt->tcfi_t); |
| 100 | tcf_hash_destroy(&ipt->common, &ipt_hash_info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | ret = ACT_P_DELETED; |
| 102 | } |
| 103 | } |
| 104 | return ret; |
| 105 | } |
| 106 | |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 107 | static int tcf_ipt_init(struct rtattr *rta, struct rtattr *est, |
| 108 | struct tc_action *a, int ovr, int bind) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | { |
| 110 | struct rtattr *tb[TCA_IPT_MAX]; |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 111 | struct tcf_ipt *ipt; |
| 112 | struct tcf_common *pc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | struct ipt_entry_target *td, *t; |
| 114 | char *tname; |
| 115 | int ret = 0, err; |
| 116 | u32 hook = 0; |
| 117 | u32 index = 0; |
| 118 | |
| 119 | if (rta == NULL || rtattr_parse_nested(tb, TCA_IPT_MAX, rta) < 0) |
| 120 | return -EINVAL; |
| 121 | |
| 122 | if (tb[TCA_IPT_HOOK-1] == NULL || |
| 123 | RTA_PAYLOAD(tb[TCA_IPT_HOOK-1]) < sizeof(u32)) |
| 124 | return -EINVAL; |
| 125 | if (tb[TCA_IPT_TARG-1] == NULL || |
| 126 | RTA_PAYLOAD(tb[TCA_IPT_TARG-1]) < sizeof(*t)) |
| 127 | return -EINVAL; |
| 128 | td = (struct ipt_entry_target *)RTA_DATA(tb[TCA_IPT_TARG-1]); |
| 129 | if (RTA_PAYLOAD(tb[TCA_IPT_TARG-1]) < td->u.target_size) |
| 130 | return -EINVAL; |
| 131 | |
| 132 | if (tb[TCA_IPT_INDEX-1] != NULL && |
| 133 | RTA_PAYLOAD(tb[TCA_IPT_INDEX-1]) >= sizeof(u32)) |
| 134 | index = *(u32 *)RTA_DATA(tb[TCA_IPT_INDEX-1]); |
| 135 | |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 136 | pc = tcf_hash_check(index, a, bind, &ipt_hash_info); |
| 137 | if (!pc) { |
| 138 | pc = tcf_hash_create(index, est, a, sizeof(*ipt), bind, |
| 139 | &ipt_idx_gen, &ipt_hash_info); |
| 140 | if (unlikely(!pc)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | return -ENOMEM; |
| 142 | ret = ACT_P_CREATED; |
| 143 | } else { |
| 144 | if (!ovr) { |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 145 | tcf_ipt_release(to_ipt(pc), bind); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | return -EEXIST; |
| 147 | } |
| 148 | } |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 149 | ipt = to_ipt(pc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | |
| 151 | hook = *(u32 *)RTA_DATA(tb[TCA_IPT_HOOK-1]); |
| 152 | |
| 153 | err = -ENOMEM; |
| 154 | tname = kmalloc(IFNAMSIZ, GFP_KERNEL); |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 155 | if (unlikely(!tname)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | goto err1; |
| 157 | if (tb[TCA_IPT_TABLE - 1] == NULL || |
| 158 | rtattr_strlcpy(tname, tb[TCA_IPT_TABLE-1], IFNAMSIZ) >= IFNAMSIZ) |
| 159 | strcpy(tname, "mangle"); |
| 160 | |
Arnaldo Carvalho de Melo | c7b1b24 | 2006-11-21 01:19:40 -0200 | [diff] [blame] | 161 | t = kmemdup(td, td->u.target_size, GFP_KERNEL); |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 162 | if (unlikely(!t)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 163 | goto err2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | |
| 165 | if ((err = ipt_init_target(t, tname, hook)) < 0) |
| 166 | goto err3; |
| 167 | |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 168 | spin_lock_bh(&ipt->tcf_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | if (ret != ACT_P_CREATED) { |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 170 | ipt_destroy_target(ipt->tcfi_t); |
| 171 | kfree(ipt->tcfi_tname); |
| 172 | kfree(ipt->tcfi_t); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | } |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 174 | ipt->tcfi_tname = tname; |
| 175 | ipt->tcfi_t = t; |
| 176 | ipt->tcfi_hook = hook; |
| 177 | spin_unlock_bh(&ipt->tcf_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | if (ret == ACT_P_CREATED) |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 179 | tcf_hash_insert(pc, &ipt_hash_info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 180 | return ret; |
| 181 | |
| 182 | err3: |
| 183 | kfree(t); |
| 184 | err2: |
| 185 | kfree(tname); |
| 186 | err1: |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 187 | kfree(pc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 188 | return err; |
| 189 | } |
| 190 | |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 191 | static int tcf_ipt_cleanup(struct tc_action *a, int bind) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | { |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 193 | struct tcf_ipt *ipt = a->priv; |
| 194 | return tcf_ipt_release(ipt, bind); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | } |
| 196 | |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 197 | static int tcf_ipt(struct sk_buff *skb, struct tc_action *a, |
| 198 | struct tcf_result *res) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 199 | { |
| 200 | int ret = 0, result = 0; |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 201 | struct tcf_ipt *ipt = a->priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | |
| 203 | if (skb_cloned(skb)) { |
| 204 | if (pskb_expand_head(skb, 0, 0, GFP_ATOMIC)) |
| 205 | return TC_ACT_UNSPEC; |
| 206 | } |
| 207 | |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 208 | spin_lock(&ipt->tcf_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 210 | ipt->tcf_tm.lastuse = jiffies; |
| 211 | ipt->tcf_bstats.bytes += skb->len; |
| 212 | ipt->tcf_bstats.packets++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | |
| 214 | /* yes, we have to worry about both in and out dev |
| 215 | worry later - danger - this API seems to have changed |
| 216 | from earlier kernels */ |
| 217 | |
Patrick McHardy | f43c5a0 | 2006-01-08 22:15:34 -0800 | [diff] [blame] | 218 | /* iptables targets take a double skb pointer in case the skb |
| 219 | * needs to be replaced. We don't own the skb, so this must not |
| 220 | * happen. The pskb_expand_head above should make sure of this */ |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 221 | ret = ipt->tcfi_t->u.kernel.target->target(&skb, skb->dev, NULL, |
| 222 | ipt->tcfi_hook, |
| 223 | ipt->tcfi_t->u.kernel.target, |
Patrick McHardy | fe1cb10 | 2006-08-22 00:35:47 -0700 | [diff] [blame] | 224 | ipt->tcfi_t->data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | switch (ret) { |
| 226 | case NF_ACCEPT: |
| 227 | result = TC_ACT_OK; |
| 228 | break; |
| 229 | case NF_DROP: |
| 230 | result = TC_ACT_SHOT; |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 231 | ipt->tcf_qstats.drops++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | break; |
| 233 | case IPT_CONTINUE: |
| 234 | result = TC_ACT_PIPE; |
| 235 | break; |
| 236 | default: |
| 237 | if (net_ratelimit()) |
| 238 | printk("Bogus netfilter code %d assume ACCEPT\n", ret); |
| 239 | result = TC_POLICE_OK; |
| 240 | break; |
| 241 | } |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 242 | spin_unlock(&ipt->tcf_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | return result; |
| 244 | |
| 245 | } |
| 246 | |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 247 | static int tcf_ipt_dump(struct sk_buff *skb, struct tc_action *a, int bind, int ref) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | { |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 249 | unsigned char *b = skb->tail; |
| 250 | struct tcf_ipt *ipt = a->priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | struct ipt_entry_target *t; |
| 252 | struct tcf_t tm; |
| 253 | struct tc_cnt c; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | |
| 255 | /* for simple targets kernel size == user size |
| 256 | ** user name = target name |
| 257 | ** for foolproof you need to not assume this |
| 258 | */ |
| 259 | |
Arnaldo Carvalho de Melo | c7b1b24 | 2006-11-21 01:19:40 -0200 | [diff] [blame] | 260 | t = kmemdup(ipt->tcfi_t, ipt->tcfi_t->u.user.target_size, GFP_ATOMIC); |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 261 | if (unlikely(!t)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | goto rtattr_failure; |
| 263 | |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 264 | c.bindcnt = ipt->tcf_bindcnt - bind; |
| 265 | c.refcnt = ipt->tcf_refcnt - ref; |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 266 | strcpy(t->u.user.name, ipt->tcfi_t->u.kernel.target->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 268 | RTA_PUT(skb, TCA_IPT_TARG, ipt->tcfi_t->u.user.target_size, t); |
| 269 | RTA_PUT(skb, TCA_IPT_INDEX, 4, &ipt->tcf_index); |
| 270 | RTA_PUT(skb, TCA_IPT_HOOK, 4, &ipt->tcfi_hook); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | RTA_PUT(skb, TCA_IPT_CNT, sizeof(struct tc_cnt), &c); |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 272 | RTA_PUT(skb, TCA_IPT_TABLE, IFNAMSIZ, ipt->tcfi_tname); |
| 273 | tm.install = jiffies_to_clock_t(jiffies - ipt->tcf_tm.install); |
| 274 | tm.lastuse = jiffies_to_clock_t(jiffies - ipt->tcf_tm.lastuse); |
| 275 | tm.expires = jiffies_to_clock_t(ipt->tcf_tm.expires); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | RTA_PUT(skb, TCA_IPT_TM, sizeof (tm), &tm); |
| 277 | kfree(t); |
| 278 | return skb->len; |
| 279 | |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 280 | rtattr_failure: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | skb_trim(skb, b - skb->data); |
| 282 | kfree(t); |
| 283 | return -1; |
| 284 | } |
| 285 | |
| 286 | static struct tc_action_ops act_ipt_ops = { |
| 287 | .kind = "ipt", |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 288 | .hinfo = &ipt_hash_info, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 289 | .type = TCA_ACT_IPT, |
| 290 | .capab = TCA_CAP_NONE, |
| 291 | .owner = THIS_MODULE, |
| 292 | .act = tcf_ipt, |
| 293 | .dump = tcf_ipt_dump, |
| 294 | .cleanup = tcf_ipt_cleanup, |
| 295 | .lookup = tcf_hash_search, |
| 296 | .init = tcf_ipt_init, |
| 297 | .walk = tcf_generic_walker |
| 298 | }; |
| 299 | |
| 300 | MODULE_AUTHOR("Jamal Hadi Salim(2002-4)"); |
| 301 | MODULE_DESCRIPTION("Iptables target actions"); |
| 302 | MODULE_LICENSE("GPL"); |
| 303 | |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 304 | static int __init ipt_init_module(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | { |
| 306 | return tcf_register_action(&act_ipt_ops); |
| 307 | } |
| 308 | |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 309 | static void __exit ipt_cleanup_module(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | { |
| 311 | tcf_unregister_action(&act_ipt_ops); |
| 312 | } |
| 313 | |
| 314 | module_init(ipt_init_module); |
| 315 | module_exit(ipt_cleanup_module); |