Commit | Line | Data |
---|---|---|
b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 LT |
2 | #ifndef __LINUX_NETFILTER_H |
3 | #define __LINUX_NETFILTER_H | |
4 | ||
1da177e4 | 5 | #include <linux/init.h> |
1da177e4 LT |
6 | #include <linux/skbuff.h> |
7 | #include <linux/net.h> | |
8 | #include <linux/if.h> | |
2e3075a2 JE |
9 | #include <linux/in.h> |
10 | #include <linux/in6.h> | |
1da177e4 LT |
11 | #include <linux/wait.h> |
12 | #include <linux/list.h> | |
d1c85c2e | 13 | #include <linux/static_key.h> |
a263653e | 14 | #include <linux/netfilter_defs.h> |
085db2c0 EB |
15 | #include <linux/netdevice.h> |
16 | #include <net/net_namespace.h> | |
a263653e | 17 | |
1da177e4 | 18 | #ifdef CONFIG_NETFILTER |
f615df76 FW |
19 | static inline int NF_DROP_GETERR(int verdict) |
20 | { | |
21 | return -(verdict >> NF_VERDICT_QBITS); | |
22 | } | |
1da177e4 | 23 | |
b8beedd2 PM |
24 | static inline int nf_inet_addr_cmp(const union nf_inet_addr *a1, |
25 | const union nf_inet_addr *a2) | |
26 | { | |
01902f8c LR |
27 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
28 | const unsigned long *ul1 = (const unsigned long *)a1; | |
29 | const unsigned long *ul2 = (const unsigned long *)a2; | |
30 | ||
31 | return ((ul1[0] ^ ul2[0]) | (ul1[1] ^ ul2[1])) == 0UL; | |
32 | #else | |
b8beedd2 PM |
33 | return a1->all[0] == a2->all[0] && |
34 | a1->all[1] == a2->all[1] && | |
35 | a1->all[2] == a2->all[2] && | |
36 | a1->all[3] == a2->all[3]; | |
01902f8c | 37 | #endif |
b8beedd2 PM |
38 | } |
39 | ||
efdedd54 DF |
40 | static inline void nf_inet_addr_mask(const union nf_inet_addr *a1, |
41 | union nf_inet_addr *result, | |
42 | const union nf_inet_addr *mask) | |
43 | { | |
522e4077 LR |
44 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
45 | const unsigned long *ua = (const unsigned long *)a1; | |
46 | unsigned long *ur = (unsigned long *)result; | |
47 | const unsigned long *um = (const unsigned long *)mask; | |
48 | ||
49 | ur[0] = ua[0] & um[0]; | |
50 | ur[1] = ua[1] & um[1]; | |
51 | #else | |
efdedd54 DF |
52 | result->all[0] = a1->all[0] & mask->all[0]; |
53 | result->all[1] = a1->all[1] & mask->all[1]; | |
54 | result->all[2] = a1->all[2] & mask->all[2]; | |
55 | result->all[3] = a1->all[3] & mask->all[3]; | |
522e4077 | 56 | #endif |
efdedd54 DF |
57 | } |
58 | ||
a0f4ecf3 | 59 | int netfilter_init(void); |
1da177e4 | 60 | |
1da177e4 | 61 | struct sk_buff; |
1da177e4 | 62 | |
795aa6ef | 63 | struct nf_hook_ops; |
cfdfab31 | 64 | |
1c984f8a DM |
65 | struct sock; |
66 | ||
cfdfab31 DM |
67 | struct nf_hook_state { |
68 | unsigned int hook; | |
cfdfab31 DM |
69 | u_int8_t pf; |
70 | struct net_device *in; | |
71 | struct net_device *out; | |
1c984f8a | 72 | struct sock *sk; |
b11b1f65 | 73 | struct net *net; |
0c4b51f0 | 74 | int (*okfn)(struct net *, struct sock *, struct sk_buff *); |
cfdfab31 DM |
75 | }; |
76 | ||
e3b37f11 AC |
77 | typedef unsigned int nf_hookfn(void *priv, |
78 | struct sk_buff *skb, | |
79 | const struct nf_hook_state *state); | |
80 | struct nf_hook_ops { | |
e3b37f11 AC |
81 | /* User fills in from here down. */ |
82 | nf_hookfn *hook; | |
83 | struct net_device *dev; | |
84 | void *priv; | |
85 | u_int8_t pf; | |
86 | unsigned int hooknum; | |
87 | /* Hooks are ordered in ascending priority. */ | |
88 | int priority; | |
89 | }; | |
90 | ||
91 | struct nf_hook_entry { | |
d415b9eb AC |
92 | nf_hookfn *hook; |
93 | void *priv; | |
e3b37f11 AC |
94 | }; |
95 | ||
8c873e21 FW |
96 | struct nf_hook_entries_rcu_head { |
97 | struct rcu_head head; | |
98 | void *allocation; | |
99 | }; | |
100 | ||
960632ec AC |
101 | struct nf_hook_entries { |
102 | u16 num_hook_entries; | |
103 | /* padding */ | |
104 | struct nf_hook_entry hooks[]; | |
105 | ||
8c873e21 FW |
106 | /* trailer: pointers to original orig_ops of each hook, |
107 | * followed by rcu_head and scratch space used for freeing | |
108 | * the structure via call_rcu. | |
960632ec | 109 | * |
8c873e21 FW |
110 | * This is not part of struct nf_hook_entry since its only |
111 | * needed in slow path (hook register/unregister): | |
960632ec | 112 | * const struct nf_hook_ops *orig_ops[] |
8c873e21 FW |
113 | * |
114 | * For the same reason, we store this at end -- its | |
115 | * only needed when a hook is deleted, not during | |
116 | * packet path processing: | |
117 | * struct nf_hook_entries_rcu_head head | |
960632ec AC |
118 | */ |
119 | }; | |
0aa8c57a | 120 | |
960632ec | 121 | static inline struct nf_hook_ops **nf_hook_entries_get_hook_ops(const struct nf_hook_entries *e) |
0aa8c57a | 122 | { |
960632ec AC |
123 | unsigned int n = e->num_hook_entries; |
124 | const void *hook_end; | |
125 | ||
126 | hook_end = &e->hooks[n]; /* this is *past* ->hooks[]! */ | |
127 | ||
128 | return (struct nf_hook_ops **)hook_end; | |
0aa8c57a AC |
129 | } |
130 | ||
131 | static inline int | |
132 | nf_hook_entry_hookfn(const struct nf_hook_entry *entry, struct sk_buff *skb, | |
133 | struct nf_hook_state *state) | |
134 | { | |
d415b9eb | 135 | return entry->hook(entry->priv, skb, state); |
0aa8c57a AC |
136 | } |
137 | ||
107a9f4d DM |
138 | static inline void nf_hook_state_init(struct nf_hook_state *p, |
139 | unsigned int hook, | |
1610a73c | 140 | u_int8_t pf, |
107a9f4d DM |
141 | struct net_device *indev, |
142 | struct net_device *outdev, | |
1c984f8a | 143 | struct sock *sk, |
b11b1f65 | 144 | struct net *net, |
0c4b51f0 | 145 | int (*okfn)(struct net *, struct sock *, struct sk_buff *)) |
107a9f4d DM |
146 | { |
147 | p->hook = hook; | |
107a9f4d DM |
148 | p->pf = pf; |
149 | p->in = indev; | |
150 | p->out = outdev; | |
1c984f8a | 151 | p->sk = sk; |
b11b1f65 | 152 | p->net = net; |
107a9f4d DM |
153 | p->okfn = okfn; |
154 | } | |
155 | ||
1da177e4 | 156 | |
1da177e4 | 157 | |
d94d9fee | 158 | struct nf_sockopt_ops { |
1da177e4 LT |
159 | struct list_head list; |
160 | ||
76108cea | 161 | u_int8_t pf; |
1da177e4 LT |
162 | |
163 | /* Non-inclusive ranges: use 0/0/NULL to never get called. */ | |
164 | int set_optmin; | |
165 | int set_optmax; | |
166 | int (*set)(struct sock *sk, int optval, void __user *user, unsigned int len); | |
c30f540b | 167 | #ifdef CONFIG_COMPAT |
3fdadf7d DM |
168 | int (*compat_set)(struct sock *sk, int optval, |
169 | void __user *user, unsigned int len); | |
c30f540b | 170 | #endif |
1da177e4 LT |
171 | int get_optmin; |
172 | int get_optmax; | |
173 | int (*get)(struct sock *sk, int optval, void __user *user, int *len); | |
c30f540b | 174 | #ifdef CONFIG_COMPAT |
3fdadf7d DM |
175 | int (*compat_get)(struct sock *sk, int optval, |
176 | void __user *user, int *len); | |
c30f540b | 177 | #endif |
16fcec35 NH |
178 | /* Use the module struct to lock set/get code in place */ |
179 | struct module *owner; | |
1da177e4 LT |
180 | }; |
181 | ||
1da177e4 | 182 | /* Function to register/unregister hook points. */ |
085db2c0 EB |
183 | int nf_register_net_hook(struct net *net, const struct nf_hook_ops *ops); |
184 | void nf_unregister_net_hook(struct net *net, const struct nf_hook_ops *ops); | |
185 | int nf_register_net_hooks(struct net *net, const struct nf_hook_ops *reg, | |
186 | unsigned int n); | |
187 | void nf_unregister_net_hooks(struct net *net, const struct nf_hook_ops *reg, | |
188 | unsigned int n); | |
189 | ||
1da177e4 LT |
190 | /* Functions to register get/setsockopt ranges (non-inclusive). You |
191 | need to check permissions yourself! */ | |
192 | int nf_register_sockopt(struct nf_sockopt_ops *reg); | |
193 | void nf_unregister_sockopt(struct nf_sockopt_ops *reg); | |
194 | ||
e9666d10 | 195 | #ifdef CONFIG_JUMP_LABEL |
c5905afb | 196 | extern struct static_key nf_hooks_needed[NFPROTO_NUMPROTO][NF_MAX_HOOKS]; |
a2d7ec58 ED |
197 | #endif |
198 | ||
01886bd9 | 199 | int nf_hook_slow(struct sk_buff *skb, struct nf_hook_state *state, |
960632ec | 200 | const struct nf_hook_entries *e, unsigned int i); |
16a6677f PM |
201 | |
202 | /** | |
1610a73c | 203 | * nf_hook - call a netfilter hook |
b8d0aad0 | 204 | * |
16a6677f PM |
205 | * Returns 1 if the hook has allowed the packet to pass. The function |
206 | * okfn must be invoked by the caller in this case. Any other return | |
207 | * value indicates the packet has been consumed by the hook. | |
208 | */ | |
1610a73c PNA |
209 | static inline int nf_hook(u_int8_t pf, unsigned int hook, struct net *net, |
210 | struct sock *sk, struct sk_buff *skb, | |
211 | struct net_device *indev, struct net_device *outdev, | |
212 | int (*okfn)(struct net *, struct sock *, struct sk_buff *)) | |
16a6677f | 213 | { |
b0f38338 | 214 | struct nf_hook_entries *hook_head = NULL; |
e3b37f11 | 215 | int ret = 1; |
af4610c3 | 216 | |
e9666d10 | 217 | #ifdef CONFIG_JUMP_LABEL |
af4610c3 FW |
218 | if (__builtin_constant_p(pf) && |
219 | __builtin_constant_p(hook) && | |
220 | !static_key_false(&nf_hooks_needed[pf][hook])) | |
221 | return 1; | |
222 | #endif | |
223 | ||
e3b37f11 | 224 | rcu_read_lock(); |
b0f38338 FW |
225 | switch (pf) { |
226 | case NFPROTO_IPV4: | |
227 | hook_head = rcu_dereference(net->nf.hooks_ipv4[hook]); | |
228 | break; | |
229 | case NFPROTO_IPV6: | |
230 | hook_head = rcu_dereference(net->nf.hooks_ipv6[hook]); | |
231 | break; | |
232 | case NFPROTO_ARP: | |
2a95183a | 233 | #ifdef CONFIG_NETFILTER_FAMILY_ARP |
421c119f FW |
234 | if (WARN_ON_ONCE(hook >= ARRAY_SIZE(net->nf.hooks_arp))) |
235 | break; | |
b0f38338 | 236 | hook_head = rcu_dereference(net->nf.hooks_arp[hook]); |
2a95183a | 237 | #endif |
b0f38338 FW |
238 | break; |
239 | case NFPROTO_BRIDGE: | |
2a95183a | 240 | #ifdef CONFIG_NETFILTER_FAMILY_BRIDGE |
b0f38338 | 241 | hook_head = rcu_dereference(net->nf.hooks_bridge[hook]); |
2a95183a | 242 | #endif |
b0f38338 | 243 | break; |
bb4badf3 | 244 | #if IS_ENABLED(CONFIG_DECNET) |
b0f38338 FW |
245 | case NFPROTO_DECNET: |
246 | hook_head = rcu_dereference(net->nf.hooks_decnet[hook]); | |
247 | break; | |
bb4badf3 | 248 | #endif |
b0f38338 FW |
249 | default: |
250 | WARN_ON_ONCE(1); | |
251 | break; | |
252 | } | |
253 | ||
e3b37f11 | 254 | if (hook_head) { |
107a9f4d | 255 | struct nf_hook_state state; |
cfdfab31 | 256 | |
01886bd9 | 257 | nf_hook_state_init(&state, hook, pf, indev, outdev, |
1610a73c | 258 | sk, net, okfn); |
fe72926b | 259 | |
960632ec | 260 | ret = nf_hook_slow(skb, &state, hook_head, 0); |
cfdfab31 | 261 | } |
e3b37f11 AC |
262 | rcu_read_unlock(); |
263 | ||
264 | return ret; | |
16a6677f PM |
265 | } |
266 | ||
1da177e4 LT |
267 | /* Activate hook; either okfn or kfree_skb called, unless a hook |
268 | returns NF_STOLEN (in which case, it's up to the hook to deal with | |
269 | the consequences). | |
270 | ||
271 | Returns -ERRNO if packet dropped. Zero means queued, stolen or | |
272 | accepted. | |
273 | */ | |
274 | ||
275 | /* RR: | |
276 | > I don't want nf_hook to return anything because people might forget | |
277 | > about async and trust the return value to mean "packet was ok". | |
278 | ||
279 | AK: | |
280 | Just document it clearly, then you can expect some sense from kernel | |
281 | coders :) | |
282 | */ | |
283 | ||
2249065f | 284 | static inline int |
29a26a56 | 285 | NF_HOOK_COND(uint8_t pf, unsigned int hook, struct net *net, struct sock *sk, |
7026b1dd | 286 | struct sk_buff *skb, struct net_device *in, struct net_device *out, |
0c4b51f0 EB |
287 | int (*okfn)(struct net *, struct sock *, struct sk_buff *), |
288 | bool cond) | |
2249065f | 289 | { |
4bac6b18 PM |
290 | int ret; |
291 | ||
292 | if (!cond || | |
1610a73c | 293 | ((ret = nf_hook(pf, hook, net, sk, skb, in, out, okfn)) == 1)) |
0c4b51f0 | 294 | ret = okfn(net, sk, skb); |
2249065f JE |
295 | return ret; |
296 | } | |
1da177e4 | 297 | |
2249065f | 298 | static inline int |
29a26a56 | 299 | NF_HOOK(uint8_t pf, unsigned int hook, struct net *net, struct sock *sk, struct sk_buff *skb, |
2249065f | 300 | struct net_device *in, struct net_device *out, |
0c4b51f0 | 301 | int (*okfn)(struct net *, struct sock *, struct sk_buff *)) |
2249065f | 302 | { |
1610a73c PNA |
303 | int ret = nf_hook(pf, hook, net, sk, skb, in, out, okfn); |
304 | if (ret == 1) | |
305 | ret = okfn(net, sk, skb); | |
306 | return ret; | |
2249065f | 307 | } |
1da177e4 | 308 | |
17266ee9 EC |
309 | static inline void |
310 | NF_HOOK_LIST(uint8_t pf, unsigned int hook, struct net *net, struct sock *sk, | |
311 | struct list_head *head, struct net_device *in, struct net_device *out, | |
312 | int (*okfn)(struct net *, struct sock *, struct sk_buff *)) | |
313 | { | |
314 | struct sk_buff *skb, *next; | |
9f17dbf0 | 315 | struct list_head sublist; |
17266ee9 | 316 | |
9f17dbf0 | 317 | INIT_LIST_HEAD(&sublist); |
17266ee9 | 318 | list_for_each_entry_safe(skb, next, head, list) { |
9f17dbf0 EC |
319 | list_del(&skb->list); |
320 | if (nf_hook(pf, hook, net, sk, skb, in, out, okfn) == 1) | |
321 | list_add_tail(&skb->list, &sublist); | |
17266ee9 | 322 | } |
9f17dbf0 EC |
323 | /* Put passed packets back on main list */ |
324 | list_splice(&sublist, head); | |
17266ee9 EC |
325 | } |
326 | ||
1da177e4 | 327 | /* Call setsockopt() */ |
76108cea | 328 | int nf_setsockopt(struct sock *sk, u_int8_t pf, int optval, char __user *opt, |
b7058842 | 329 | unsigned int len); |
76108cea | 330 | int nf_getsockopt(struct sock *sk, u_int8_t pf, int optval, char __user *opt, |
1da177e4 | 331 | int *len); |
c30f540b | 332 | #ifdef CONFIG_COMPAT |
76108cea | 333 | int compat_nf_setsockopt(struct sock *sk, u_int8_t pf, int optval, |
b7058842 | 334 | char __user *opt, unsigned int len); |
76108cea | 335 | int compat_nf_getsockopt(struct sock *sk, u_int8_t pf, int optval, |
3fdadf7d | 336 | char __user *opt, int *len); |
c30f540b | 337 | #endif |
3fdadf7d | 338 | |
1841a4c7 | 339 | struct flowi; |
02f014d8 | 340 | struct nf_queue_entry; |
c01cd429 | 341 | |
ef71fe27 PNA |
342 | __sum16 nf_checksum(struct sk_buff *skb, unsigned int hook, |
343 | unsigned int dataoff, u_int8_t protocol, | |
344 | unsigned short family); | |
422c346f | 345 | |
f7dcbe2f PNA |
346 | __sum16 nf_checksum_partial(struct sk_buff *skb, unsigned int hook, |
347 | unsigned int dataoff, unsigned int len, | |
348 | u_int8_t protocol, unsigned short family); | |
3f87c08c PNA |
349 | int nf_route(struct net *net, struct dst_entry **dst, struct flowi *fl, |
350 | bool strict, unsigned short family); | |
ce388f45 | 351 | int nf_reroute(struct sk_buff *skb, struct nf_queue_entry *entry); |
d63a6507 | 352 | |
eb9c7ebe | 353 | #include <net/flow.h> |
2c205dd3 PNA |
354 | |
355 | struct nf_conn; | |
356 | enum nf_nat_manip_type; | |
357 | struct nlattr; | |
368982cd | 358 | enum ip_conntrack_dir; |
2c205dd3 PNA |
359 | |
360 | struct nf_nat_hook { | |
361 | int (*parse_nat_setup)(struct nf_conn *ct, enum nf_nat_manip_type manip, | |
362 | const struct nlattr *attr); | |
363 | void (*decode_session)(struct sk_buff *skb, struct flowi *fl); | |
368982cd PNA |
364 | unsigned int (*manip_pkt)(struct sk_buff *skb, struct nf_conn *ct, |
365 | enum nf_nat_manip_type mtype, | |
366 | enum ip_conntrack_dir dir); | |
2c205dd3 PNA |
367 | }; |
368 | ||
369 | extern struct nf_nat_hook __rcu *nf_nat_hook; | |
eb9c7ebe PM |
370 | |
371 | static inline void | |
76108cea | 372 | nf_nat_decode_session(struct sk_buff *skb, struct flowi *fl, u_int8_t family) |
eb9c7ebe | 373 | { |
4806e975 | 374 | #if IS_ENABLED(CONFIG_NF_NAT) |
2c205dd3 | 375 | struct nf_nat_hook *nat_hook; |
eb9c7ebe | 376 | |
c7232c99 | 377 | rcu_read_lock(); |
2c205dd3 | 378 | nat_hook = rcu_dereference(nf_nat_hook); |
155fb5c5 | 379 | if (nat_hook && nat_hook->decode_session) |
2c205dd3 | 380 | nat_hook->decode_session(skb, fl); |
c7232c99 | 381 | rcu_read_unlock(); |
eb9c7ebe PM |
382 | #endif |
383 | } | |
384 | ||
1da177e4 | 385 | #else /* !CONFIG_NETFILTER */ |
008027c3 AB |
386 | static inline int |
387 | NF_HOOK_COND(uint8_t pf, unsigned int hook, struct net *net, struct sock *sk, | |
388 | struct sk_buff *skb, struct net_device *in, struct net_device *out, | |
389 | int (*okfn)(struct net *, struct sock *, struct sk_buff *), | |
390 | bool cond) | |
391 | { | |
392 | return okfn(net, sk, skb); | |
393 | } | |
394 | ||
395 | static inline int | |
396 | NF_HOOK(uint8_t pf, unsigned int hook, struct net *net, struct sock *sk, | |
397 | struct sk_buff *skb, struct net_device *in, struct net_device *out, | |
398 | int (*okfn)(struct net *, struct sock *, struct sk_buff *)) | |
399 | { | |
400 | return okfn(net, sk, skb); | |
401 | } | |
402 | ||
17266ee9 EC |
403 | static inline void |
404 | NF_HOOK_LIST(uint8_t pf, unsigned int hook, struct net *net, struct sock *sk, | |
405 | struct list_head *head, struct net_device *in, struct net_device *out, | |
406 | int (*okfn)(struct net *, struct sock *, struct sk_buff *)) | |
407 | { | |
408 | /* nothing to do */ | |
409 | } | |
410 | ||
29a26a56 EB |
411 | static inline int nf_hook(u_int8_t pf, unsigned int hook, struct net *net, |
412 | struct sock *sk, struct sk_buff *skb, | |
413 | struct net_device *indev, struct net_device *outdev, | |
0c4b51f0 | 414 | int (*okfn)(struct net *, struct sock *, struct sk_buff *)) |
f53b61d8 | 415 | { |
9c92d348 | 416 | return 1; |
f53b61d8 | 417 | } |
f53b61d8 | 418 | struct flowi; |
eb9c7ebe | 419 | static inline void |
76108cea JE |
420 | nf_nat_decode_session(struct sk_buff *skb, struct flowi *fl, u_int8_t family) |
421 | { | |
422 | } | |
1da177e4 LT |
423 | #endif /*CONFIG_NETFILTER*/ |
424 | ||
5f79e0f9 | 425 | #if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE) |
62da9865 DB |
426 | #include <linux/netfilter/nf_conntrack_zones_common.h> |
427 | ||
312a0c16 | 428 | extern void (*ip_ct_attach)(struct sk_buff *, const struct sk_buff *) __rcu; |
a0f4ecf3 | 429 | void nf_ct_attach(struct sk_buff *, const struct sk_buff *); |
b60a6040 THJ |
430 | struct nf_conntrack_tuple; |
431 | bool nf_ct_get_tuple_skb(struct nf_conntrack_tuple *dst_tuple, | |
432 | const struct sk_buff *skb); | |
b7bd1809 PNA |
433 | #else |
434 | static inline void nf_ct_attach(struct sk_buff *new, struct sk_buff *skb) {} | |
b60a6040 THJ |
435 | struct nf_conntrack_tuple; |
436 | static inline bool nf_ct_get_tuple_skb(struct nf_conntrack_tuple *dst_tuple, | |
437 | const struct sk_buff *skb) | |
438 | { | |
439 | return false; | |
440 | } | |
b7bd1809 | 441 | #endif |
9cb01766 PNA |
442 | |
443 | struct nf_conn; | |
41d73ec0 | 444 | enum ip_conntrack_info; |
1f4b2439 PNA |
445 | |
446 | struct nf_ct_hook { | |
368982cd | 447 | int (*update)(struct net *net, struct sk_buff *skb); |
1f4b2439 | 448 | void (*destroy)(struct nf_conntrack *); |
b60a6040 THJ |
449 | bool (*get_tuple_skb)(struct nf_conntrack_tuple *, |
450 | const struct sk_buff *); | |
1f4b2439 PNA |
451 | }; |
452 | extern struct nf_ct_hook __rcu *nf_ct_hook; | |
453 | ||
9cb01766 PNA |
454 | struct nlattr; |
455 | ||
a4b4766c | 456 | struct nfnl_ct_hook { |
224a0597 | 457 | struct nf_conn *(*get_ct)(const struct sk_buff *skb, |
b7bd1809 | 458 | enum ip_conntrack_info *ctinfo); |
9cb01766 | 459 | size_t (*build_size)(const struct nf_conn *ct); |
b7bd1809 PNA |
460 | int (*build)(struct sk_buff *skb, struct nf_conn *ct, |
461 | enum ip_conntrack_info ctinfo, | |
462 | u_int16_t ct_attr, u_int16_t ct_info_attr); | |
9cb01766 | 463 | int (*parse)(const struct nlattr *attr, struct nf_conn *ct); |
bd077937 PNA |
464 | int (*attach_expect)(const struct nlattr *attr, struct nf_conn *ct, |
465 | u32 portid, u32 report); | |
8c88f87c | 466 | void (*seq_adjust)(struct sk_buff *skb, struct nf_conn *ct, |
41d73ec0 | 467 | enum ip_conntrack_info ctinfo, s32 off); |
9cb01766 | 468 | }; |
a4b4766c | 469 | extern struct nfnl_ct_hook __rcu *nfnl_ct_hook; |
5f79e0f9 | 470 | |
e7c8899f FW |
471 | /** |
472 | * nf_skb_duplicated - TEE target has sent a packet | |
473 | * | |
474 | * When a xtables target sends a packet, the OUTPUT and POSTROUTING | |
475 | * hooks are traversed again, i.e. nft and xtables are invoked recursively. | |
476 | * | |
477 | * This is used by xtables TEE target to prevent the duplicated skb from | |
478 | * being duplicated again. | |
479 | */ | |
480 | DECLARE_PER_CPU(bool, nf_skb_duplicated); | |
481 | ||
1da177e4 | 482 | #endif /*__LINUX_NETFILTER_H*/ |