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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 <linux/types.h>
15#include <linux/kernel.h>
16#include <linux/string.h>
17#include <linux/errno.h>
18#include <linux/skbuff.h>
19#include <linux/rtnetlink.h>
20#include <linux/module.h>
21#include <linux/init.h>
22#include <linux/slab.h>
23#include <net/netlink.h>
24#include <net/pkt_sched.h>
25#include <linux/tc_act/tc_ipt.h>
26#include <net/tc_act/tc_ipt.h>
27
28#include <linux/netfilter_ipv4/ip_tables.h>
29
30
31#define IPT_TAB_MASK 15
32static struct tcf_common *tcf_ipt_ht[IPT_TAB_MASK + 1];
33static u32 ipt_idx_gen;
34static DEFINE_RWLOCK(ipt_lock);
35
36static struct tcf_hashinfo ipt_hash_info = {
37 .htab = tcf_ipt_ht,
38 .hmask = IPT_TAB_MASK,
39 .lock = &ipt_lock,
40};
41
42static int ipt_init_target(struct xt_entry_target *t, char *table, unsigned int hook)
43{
44 struct xt_tgchk_param par;
45 struct xt_target *target;
46 int ret = 0;
47
48 target = xt_request_find_target(AF_INET, t->u.user.name,
49 t->u.user.revision);
50 if (IS_ERR(target))
51 return PTR_ERR(target);
52
53 t->u.kernel.target = target;
54 par.table = table;
55 par.entryinfo = NULL;
56 par.target = target;
57 par.targinfo = t->data;
58 par.hook_mask = hook;
59 par.family = NFPROTO_IPV4;
60
61 ret = xt_check_target(&par, t->u.target_size - sizeof(*t), 0, false);
62 if (ret < 0) {
63 module_put(t->u.kernel.target->me);
64 return ret;
65 }
66 return 0;
67}
68
69static void ipt_destroy_target(struct xt_entry_target *t)
70{
71 struct xt_tgdtor_param par = {
72 .target = t->u.kernel.target,
73 .targinfo = t->data,
74 };
75 if (par.target->destroy != NULL)
76 par.target->destroy(&par);
77 module_put(par.target->me);
78}
79
80static int tcf_ipt_release(struct tcf_ipt *ipt, int bind)
81{
82 int ret = 0;
83 if (ipt) {
84 if (bind)
85 ipt->tcf_bindcnt--;
86 ipt->tcf_refcnt--;
87 if (ipt->tcf_bindcnt <= 0 && ipt->tcf_refcnt <= 0) {
88 ipt_destroy_target(ipt->tcfi_t);
89 kfree(ipt->tcfi_tname);
90 kfree(ipt->tcfi_t);
91 tcf_hash_destroy(&ipt->common, &ipt_hash_info);
92 ret = ACT_P_DELETED;
93 }
94 }
95 return ret;
96}
97
98static const struct nla_policy ipt_policy[TCA_IPT_MAX + 1] = {
99 [TCA_IPT_TABLE] = { .type = NLA_STRING, .len = IFNAMSIZ },
100 [TCA_IPT_HOOK] = { .type = NLA_U32 },
101 [TCA_IPT_INDEX] = { .type = NLA_U32 },
102 [TCA_IPT_TARG] = { .len = sizeof(struct xt_entry_target) },
103};
104
105static int tcf_ipt_init(struct nlattr *nla, struct nlattr *est,
106 struct tc_action *a, int ovr, int bind)
107{
108 struct nlattr *tb[TCA_IPT_MAX + 1];
109 struct tcf_ipt *ipt;
110 struct tcf_common *pc;
111 struct xt_entry_target *td, *t;
112 char *tname;
113 int ret = 0, err;
114 u32 hook = 0;
115 u32 index = 0;
116
117 if (nla == NULL)
118 return -EINVAL;
119
120 err = nla_parse_nested(tb, TCA_IPT_MAX, nla, ipt_policy);
121 if (err < 0)
122 return err;
123
124 if (tb[TCA_IPT_HOOK] == NULL)
125 return -EINVAL;
126 if (tb[TCA_IPT_TARG] == NULL)
127 return -EINVAL;
128
129 td = (struct xt_entry_target *)nla_data(tb[TCA_IPT_TARG]);
130 if (nla_len(tb[TCA_IPT_TARG]) < td->u.target_size)
131 return -EINVAL;
132
133 if (tb[TCA_IPT_INDEX] != NULL)
134 index = nla_get_u32(tb[TCA_IPT_INDEX]);
135
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 (IS_ERR(pc))
141 return PTR_ERR(pc);
142 ret = ACT_P_CREATED;
143 } else {
144 if (!ovr) {
145 tcf_ipt_release(to_ipt(pc), bind);
146 return -EEXIST;
147 }
148 }
149 ipt = to_ipt(pc);
150
151 hook = nla_get_u32(tb[TCA_IPT_HOOK]);
152
153 err = -ENOMEM;
154 tname = kmalloc(IFNAMSIZ, GFP_KERNEL);
155 if (unlikely(!tname))
156 goto err1;
157 if (tb[TCA_IPT_TABLE] == NULL ||
158 nla_strlcpy(tname, tb[TCA_IPT_TABLE], IFNAMSIZ) >= IFNAMSIZ)
159 strcpy(tname, "mangle");
160
161 t = kmemdup(td, td->u.target_size, GFP_KERNEL);
162 if (unlikely(!t))
163 goto err2;
164
165 err = ipt_init_target(t, tname, hook);
166 if (err < 0)
167 goto err3;
168
169 spin_lock_bh(&ipt->tcf_lock);
170 if (ret != ACT_P_CREATED) {
171 ipt_destroy_target(ipt->tcfi_t);
172 kfree(ipt->tcfi_tname);
173 kfree(ipt->tcfi_t);
174 }
175 ipt->tcfi_tname = tname;
176 ipt->tcfi_t = t;
177 ipt->tcfi_hook = hook;
178 spin_unlock_bh(&ipt->tcf_lock);
179 if (ret == ACT_P_CREATED)
180 tcf_hash_insert(pc, &ipt_hash_info);
181 return ret;
182
183err3:
184 kfree(t);
185err2:
186 kfree(tname);
187err1:
188 kfree(pc);
189 return err;
190}
191
192static int tcf_ipt_cleanup(struct tc_action *a, int bind)
193{
194 struct tcf_ipt *ipt = a->priv;
195 return tcf_ipt_release(ipt, bind);
196}
197
198static int tcf_ipt(struct sk_buff *skb, const struct tc_action *a,
199 struct tcf_result *res)
200{
201 int ret = 0, result = 0;
202 struct tcf_ipt *ipt = a->priv;
203 struct xt_action_param par;
204
205 if (skb_cloned(skb)) {
206 if (pskb_expand_head(skb, 0, 0, GFP_ATOMIC))
207 return TC_ACT_UNSPEC;
208 }
209
210 spin_lock(&ipt->tcf_lock);
211
212 ipt->tcf_tm.lastuse = jiffies;
213 bstats_update(&ipt->tcf_bstats, skb);
214
215 /* yes, we have to worry about both in and out dev
216 * worry later - danger - this API seems to have changed
217 * from earlier kernels
218 */
219 par.in = skb->dev;
220 par.out = NULL;
221 par.hooknum = ipt->tcfi_hook;
222 par.target = ipt->tcfi_t->u.kernel.target;
223 par.targinfo = ipt->tcfi_t->data;
224 ret = par.target->target(skb, &par);
225
226 switch (ret) {
227 case NF_ACCEPT:
228 result = TC_ACT_OK;
229 break;
230 case NF_DROP:
231 result = TC_ACT_SHOT;
232 ipt->tcf_qstats.drops++;
233 break;
234 case XT_CONTINUE:
235 result = TC_ACT_PIPE;
236 break;
237 default:
238 if (net_ratelimit())
239 pr_notice("tc filter: Bogus netfilter code"
240 " %d assume ACCEPT\n", ret);
241 result = TC_POLICE_OK;
242 break;
243 }
244 spin_unlock(&ipt->tcf_lock);
245 return result;
246
247}
248
249static int tcf_ipt_dump(struct sk_buff *skb, struct tc_action *a, int bind, int ref)
250{
251 unsigned char *b = skb_tail_pointer(skb);
252 struct tcf_ipt *ipt = a->priv;
253 struct xt_entry_target *t;
254 struct tcf_t tm;
255 struct tc_cnt c;
256
257 /* for simple targets kernel size == user size
258 * user name = target name
259 * for foolproof you need to not assume this
260 */
261
262 t = kmemdup(ipt->tcfi_t, ipt->tcfi_t->u.user.target_size, GFP_ATOMIC);
263 if (unlikely(!t))
264 goto nla_put_failure;
265
266 c.bindcnt = ipt->tcf_bindcnt - bind;
267 c.refcnt = ipt->tcf_refcnt - ref;
268 strcpy(t->u.user.name, ipt->tcfi_t->u.kernel.target->name);
269
270 NLA_PUT(skb, TCA_IPT_TARG, ipt->tcfi_t->u.user.target_size, t);
271 NLA_PUT_U32(skb, TCA_IPT_INDEX, ipt->tcf_index);
272 NLA_PUT_U32(skb, TCA_IPT_HOOK, ipt->tcfi_hook);
273 NLA_PUT(skb, TCA_IPT_CNT, sizeof(struct tc_cnt), &c);
274 NLA_PUT_STRING(skb, TCA_IPT_TABLE, ipt->tcfi_tname);
275 tm.install = jiffies_to_clock_t(jiffies - ipt->tcf_tm.install);
276 tm.lastuse = jiffies_to_clock_t(jiffies - ipt->tcf_tm.lastuse);
277 tm.expires = jiffies_to_clock_t(ipt->tcf_tm.expires);
278 NLA_PUT(skb, TCA_IPT_TM, sizeof (tm), &tm);
279 kfree(t);
280 return skb->len;
281
282nla_put_failure:
283 nlmsg_trim(skb, b);
284 kfree(t);
285 return -1;
286}
287
288static struct tc_action_ops act_ipt_ops = {
289 .kind = "ipt",
290 .hinfo = &ipt_hash_info,
291 .type = TCA_ACT_IPT,
292 .capab = TCA_CAP_NONE,
293 .owner = THIS_MODULE,
294 .act = tcf_ipt,
295 .dump = tcf_ipt_dump,
296 .cleanup = tcf_ipt_cleanup,
297 .lookup = tcf_hash_search,
298 .init = tcf_ipt_init,
299 .walk = tcf_generic_walker
300};
301
302MODULE_AUTHOR("Jamal Hadi Salim(2002-4)");
303MODULE_DESCRIPTION("Iptables target actions");
304MODULE_LICENSE("GPL");
305
306static int __init ipt_init_module(void)
307{
308 return tcf_register_action(&act_ipt_ops);
309}
310
311static void __exit ipt_cleanup_module(void)
312{
313 tcf_unregister_action(&act_ipt_ops);
314}
315
316module_init(ipt_init_module);
317module_exit(ipt_cleanup_module);
1/*
2 * net/sched/act_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 (2002-13)
12 */
13
14#include <linux/types.h>
15#include <linux/kernel.h>
16#include <linux/string.h>
17#include <linux/errno.h>
18#include <linux/skbuff.h>
19#include <linux/rtnetlink.h>
20#include <linux/module.h>
21#include <linux/init.h>
22#include <linux/slab.h>
23#include <net/netlink.h>
24#include <net/pkt_sched.h>
25#include <linux/tc_act/tc_ipt.h>
26#include <net/tc_act/tc_ipt.h>
27
28#include <linux/netfilter_ipv4/ip_tables.h>
29
30
31static unsigned int ipt_net_id;
32static struct tc_action_ops act_ipt_ops;
33
34static unsigned int xt_net_id;
35static struct tc_action_ops act_xt_ops;
36
37static int ipt_init_target(struct net *net, struct xt_entry_target *t,
38 char *table, unsigned int hook)
39{
40 struct xt_tgchk_param par;
41 struct xt_target *target;
42 struct ipt_entry e = {};
43 int ret = 0;
44
45 target = xt_request_find_target(AF_INET, t->u.user.name,
46 t->u.user.revision);
47 if (IS_ERR(target))
48 return PTR_ERR(target);
49
50 t->u.kernel.target = target;
51 memset(&par, 0, sizeof(par));
52 par.net = net;
53 par.table = table;
54 par.entryinfo = &e;
55 par.target = target;
56 par.targinfo = t->data;
57 par.hook_mask = hook;
58 par.family = NFPROTO_IPV4;
59
60 ret = xt_check_target(&par, t->u.target_size - sizeof(*t), 0, false);
61 if (ret < 0) {
62 module_put(t->u.kernel.target->me);
63 return ret;
64 }
65 return 0;
66}
67
68static void ipt_destroy_target(struct xt_entry_target *t)
69{
70 struct xt_tgdtor_param par = {
71 .target = t->u.kernel.target,
72 .targinfo = t->data,
73 .family = NFPROTO_IPV4,
74 };
75 if (par.target->destroy != NULL)
76 par.target->destroy(&par);
77 module_put(par.target->me);
78}
79
80static void tcf_ipt_release(struct tc_action *a)
81{
82 struct tcf_ipt *ipt = to_ipt(a);
83
84 if (ipt->tcfi_t) {
85 ipt_destroy_target(ipt->tcfi_t);
86 kfree(ipt->tcfi_t);
87 }
88 kfree(ipt->tcfi_tname);
89}
90
91static const struct nla_policy ipt_policy[TCA_IPT_MAX + 1] = {
92 [TCA_IPT_TABLE] = { .type = NLA_STRING, .len = IFNAMSIZ },
93 [TCA_IPT_HOOK] = { .type = NLA_U32 },
94 [TCA_IPT_INDEX] = { .type = NLA_U32 },
95 [TCA_IPT_TARG] = { .len = sizeof(struct xt_entry_target) },
96};
97
98static int __tcf_ipt_init(struct net *net, unsigned int id, struct nlattr *nla,
99 struct nlattr *est, struct tc_action **a,
100 const struct tc_action_ops *ops, int ovr, int bind)
101{
102 struct tc_action_net *tn = net_generic(net, id);
103 struct nlattr *tb[TCA_IPT_MAX + 1];
104 struct tcf_ipt *ipt;
105 struct xt_entry_target *td, *t;
106 char *tname;
107 bool exists = false;
108 int ret = 0, err;
109 u32 hook = 0;
110 u32 index = 0;
111
112 if (nla == NULL)
113 return -EINVAL;
114
115 err = nla_parse_nested(tb, TCA_IPT_MAX, nla, ipt_policy, NULL);
116 if (err < 0)
117 return err;
118
119 if (tb[TCA_IPT_INDEX] != NULL)
120 index = nla_get_u32(tb[TCA_IPT_INDEX]);
121
122 exists = tcf_idr_check(tn, index, a, bind);
123 if (exists && bind)
124 return 0;
125
126 if (tb[TCA_IPT_HOOK] == NULL || tb[TCA_IPT_TARG] == NULL) {
127 if (exists)
128 tcf_idr_release(*a, bind);
129 return -EINVAL;
130 }
131
132 td = (struct xt_entry_target *)nla_data(tb[TCA_IPT_TARG]);
133 if (nla_len(tb[TCA_IPT_TARG]) < td->u.target_size) {
134 if (exists)
135 tcf_idr_release(*a, bind);
136 return -EINVAL;
137 }
138
139 if (!exists) {
140 ret = tcf_idr_create(tn, index, est, a, ops, bind,
141 false);
142 if (ret)
143 return ret;
144 ret = ACT_P_CREATED;
145 } else {
146 if (bind)/* dont override defaults */
147 return 0;
148 tcf_idr_release(*a, bind);
149
150 if (!ovr)
151 return -EEXIST;
152 }
153 hook = nla_get_u32(tb[TCA_IPT_HOOK]);
154
155 err = -ENOMEM;
156 tname = kmalloc(IFNAMSIZ, GFP_KERNEL);
157 if (unlikely(!tname))
158 goto err1;
159 if (tb[TCA_IPT_TABLE] == NULL ||
160 nla_strlcpy(tname, tb[TCA_IPT_TABLE], IFNAMSIZ) >= IFNAMSIZ)
161 strcpy(tname, "mangle");
162
163 t = kmemdup(td, td->u.target_size, GFP_KERNEL);
164 if (unlikely(!t))
165 goto err2;
166
167 err = ipt_init_target(net, t, tname, hook);
168 if (err < 0)
169 goto err3;
170
171 ipt = to_ipt(*a);
172
173 spin_lock_bh(&ipt->tcf_lock);
174 if (ret != ACT_P_CREATED) {
175 ipt_destroy_target(ipt->tcfi_t);
176 kfree(ipt->tcfi_tname);
177 kfree(ipt->tcfi_t);
178 }
179 ipt->tcfi_tname = tname;
180 ipt->tcfi_t = t;
181 ipt->tcfi_hook = hook;
182 spin_unlock_bh(&ipt->tcf_lock);
183 if (ret == ACT_P_CREATED)
184 tcf_idr_insert(tn, *a);
185 return ret;
186
187err3:
188 kfree(t);
189err2:
190 kfree(tname);
191err1:
192 if (ret == ACT_P_CREATED)
193 tcf_idr_release(*a, bind);
194 return err;
195}
196
197static int tcf_ipt_init(struct net *net, struct nlattr *nla,
198 struct nlattr *est, struct tc_action **a, int ovr,
199 int bind, struct netlink_ext_ack *extack)
200{
201 return __tcf_ipt_init(net, ipt_net_id, nla, est, a, &act_ipt_ops, ovr,
202 bind);
203}
204
205static int tcf_xt_init(struct net *net, struct nlattr *nla,
206 struct nlattr *est, struct tc_action **a, int ovr,
207 int bind, struct netlink_ext_ack *extack)
208{
209 return __tcf_ipt_init(net, xt_net_id, nla, est, a, &act_xt_ops, ovr,
210 bind);
211}
212
213static int tcf_ipt(struct sk_buff *skb, const struct tc_action *a,
214 struct tcf_result *res)
215{
216 int ret = 0, result = 0;
217 struct tcf_ipt *ipt = to_ipt(a);
218 struct xt_action_param par;
219 struct nf_hook_state state = {
220 .net = dev_net(skb->dev),
221 .in = skb->dev,
222 .hook = ipt->tcfi_hook,
223 .pf = NFPROTO_IPV4,
224 };
225
226 if (skb_unclone(skb, GFP_ATOMIC))
227 return TC_ACT_UNSPEC;
228
229 spin_lock(&ipt->tcf_lock);
230
231 tcf_lastuse_update(&ipt->tcf_tm);
232 bstats_update(&ipt->tcf_bstats, skb);
233
234 /* yes, we have to worry about both in and out dev
235 * worry later - danger - this API seems to have changed
236 * from earlier kernels
237 */
238 par.state = &state;
239 par.target = ipt->tcfi_t->u.kernel.target;
240 par.targinfo = ipt->tcfi_t->data;
241 ret = par.target->target(skb, &par);
242
243 switch (ret) {
244 case NF_ACCEPT:
245 result = TC_ACT_OK;
246 break;
247 case NF_DROP:
248 result = TC_ACT_SHOT;
249 ipt->tcf_qstats.drops++;
250 break;
251 case XT_CONTINUE:
252 result = TC_ACT_PIPE;
253 break;
254 default:
255 net_notice_ratelimited("tc filter: Bogus netfilter code %d assume ACCEPT\n",
256 ret);
257 result = TC_ACT_OK;
258 break;
259 }
260 spin_unlock(&ipt->tcf_lock);
261 return result;
262
263}
264
265static int tcf_ipt_dump(struct sk_buff *skb, struct tc_action *a, int bind,
266 int ref)
267{
268 unsigned char *b = skb_tail_pointer(skb);
269 struct tcf_ipt *ipt = to_ipt(a);
270 struct xt_entry_target *t;
271 struct tcf_t tm;
272 struct tc_cnt c;
273
274 /* for simple targets kernel size == user size
275 * user name = target name
276 * for foolproof you need to not assume this
277 */
278
279 t = kmemdup(ipt->tcfi_t, ipt->tcfi_t->u.user.target_size, GFP_ATOMIC);
280 if (unlikely(!t))
281 goto nla_put_failure;
282
283 c.bindcnt = ipt->tcf_bindcnt - bind;
284 c.refcnt = ipt->tcf_refcnt - ref;
285 strcpy(t->u.user.name, ipt->tcfi_t->u.kernel.target->name);
286
287 if (nla_put(skb, TCA_IPT_TARG, ipt->tcfi_t->u.user.target_size, t) ||
288 nla_put_u32(skb, TCA_IPT_INDEX, ipt->tcf_index) ||
289 nla_put_u32(skb, TCA_IPT_HOOK, ipt->tcfi_hook) ||
290 nla_put(skb, TCA_IPT_CNT, sizeof(struct tc_cnt), &c) ||
291 nla_put_string(skb, TCA_IPT_TABLE, ipt->tcfi_tname))
292 goto nla_put_failure;
293
294 tcf_tm_dump(&tm, &ipt->tcf_tm);
295 if (nla_put_64bit(skb, TCA_IPT_TM, sizeof(tm), &tm, TCA_IPT_PAD))
296 goto nla_put_failure;
297
298 kfree(t);
299 return skb->len;
300
301nla_put_failure:
302 nlmsg_trim(skb, b);
303 kfree(t);
304 return -1;
305}
306
307static int tcf_ipt_walker(struct net *net, struct sk_buff *skb,
308 struct netlink_callback *cb, int type,
309 const struct tc_action_ops *ops,
310 struct netlink_ext_ack *extack)
311{
312 struct tc_action_net *tn = net_generic(net, ipt_net_id);
313
314 return tcf_generic_walker(tn, skb, cb, type, ops, extack);
315}
316
317static int tcf_ipt_search(struct net *net, struct tc_action **a, u32 index,
318 struct netlink_ext_ack *extack)
319{
320 struct tc_action_net *tn = net_generic(net, ipt_net_id);
321
322 return tcf_idr_search(tn, a, index);
323}
324
325static struct tc_action_ops act_ipt_ops = {
326 .kind = "ipt",
327 .type = TCA_ACT_IPT,
328 .owner = THIS_MODULE,
329 .act = tcf_ipt,
330 .dump = tcf_ipt_dump,
331 .cleanup = tcf_ipt_release,
332 .init = tcf_ipt_init,
333 .walk = tcf_ipt_walker,
334 .lookup = tcf_ipt_search,
335 .size = sizeof(struct tcf_ipt),
336};
337
338static __net_init int ipt_init_net(struct net *net)
339{
340 struct tc_action_net *tn = net_generic(net, ipt_net_id);
341
342 return tc_action_net_init(tn, &act_ipt_ops);
343}
344
345static void __net_exit ipt_exit_net(struct list_head *net_list)
346{
347 tc_action_net_exit(net_list, ipt_net_id);
348}
349
350static struct pernet_operations ipt_net_ops = {
351 .init = ipt_init_net,
352 .exit_batch = ipt_exit_net,
353 .id = &ipt_net_id,
354 .size = sizeof(struct tc_action_net),
355};
356
357static int tcf_xt_walker(struct net *net, struct sk_buff *skb,
358 struct netlink_callback *cb, int type,
359 const struct tc_action_ops *ops,
360 struct netlink_ext_ack *extack)
361{
362 struct tc_action_net *tn = net_generic(net, xt_net_id);
363
364 return tcf_generic_walker(tn, skb, cb, type, ops, extack);
365}
366
367static int tcf_xt_search(struct net *net, struct tc_action **a, u32 index,
368 struct netlink_ext_ack *extack)
369{
370 struct tc_action_net *tn = net_generic(net, xt_net_id);
371
372 return tcf_idr_search(tn, a, index);
373}
374
375static struct tc_action_ops act_xt_ops = {
376 .kind = "xt",
377 .type = TCA_ACT_XT,
378 .owner = THIS_MODULE,
379 .act = tcf_ipt,
380 .dump = tcf_ipt_dump,
381 .cleanup = tcf_ipt_release,
382 .init = tcf_xt_init,
383 .walk = tcf_xt_walker,
384 .lookup = tcf_xt_search,
385 .size = sizeof(struct tcf_ipt),
386};
387
388static __net_init int xt_init_net(struct net *net)
389{
390 struct tc_action_net *tn = net_generic(net, xt_net_id);
391
392 return tc_action_net_init(tn, &act_xt_ops);
393}
394
395static void __net_exit xt_exit_net(struct list_head *net_list)
396{
397 tc_action_net_exit(net_list, xt_net_id);
398}
399
400static struct pernet_operations xt_net_ops = {
401 .init = xt_init_net,
402 .exit_batch = xt_exit_net,
403 .id = &xt_net_id,
404 .size = sizeof(struct tc_action_net),
405};
406
407MODULE_AUTHOR("Jamal Hadi Salim(2002-13)");
408MODULE_DESCRIPTION("Iptables target actions");
409MODULE_LICENSE("GPL");
410MODULE_ALIAS("act_xt");
411
412static int __init ipt_init_module(void)
413{
414 int ret1, ret2;
415
416 ret1 = tcf_register_action(&act_xt_ops, &xt_net_ops);
417 if (ret1 < 0)
418 pr_err("Failed to load xt action\n");
419
420 ret2 = tcf_register_action(&act_ipt_ops, &ipt_net_ops);
421 if (ret2 < 0)
422 pr_err("Failed to load ipt action\n");
423
424 if (ret1 < 0 && ret2 < 0) {
425 return ret1;
426 } else
427 return 0;
428}
429
430static void __exit ipt_cleanup_module(void)
431{
432 tcf_unregister_action(&act_ipt_ops, &ipt_net_ops);
433 tcf_unregister_action(&act_xt_ops, &xt_net_ops);
434}
435
436module_init(ipt_init_module);
437module_exit(ipt_cleanup_module);