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