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Commit | Line | Data |
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7af4cc3f HW |
1 | /* |
2 | * This is a module which is used for queueing packets and communicating with | |
67137f3c | 3 | * userspace via nfnetlink. |
7af4cc3f HW |
4 | * |
5 | * (C) 2005 by Harald Welte <laforge@netfilter.org> | |
4ad9d4fa | 6 | * (C) 2007 by Patrick McHardy <kaber@trash.net> |
7af4cc3f HW |
7 | * |
8 | * Based on the old ipv4-only ip_queue.c: | |
9 | * (C) 2000-2002 James Morris <jmorris@intercode.com.au> | |
10 | * (C) 2003-2005 Netfilter Core Team <coreteam@netfilter.org> | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License version 2 as | |
14 | * published by the Free Software Foundation. | |
15 | * | |
16 | */ | |
17 | #include <linux/module.h> | |
18 | #include <linux/skbuff.h> | |
19 | #include <linux/init.h> | |
20 | #include <linux/spinlock.h> | |
5a0e3ad6 | 21 | #include <linux/slab.h> |
7af4cc3f HW |
22 | #include <linux/notifier.h> |
23 | #include <linux/netdevice.h> | |
24 | #include <linux/netfilter.h> | |
838ab636 | 25 | #include <linux/proc_fs.h> |
7af4cc3f HW |
26 | #include <linux/netfilter_ipv4.h> |
27 | #include <linux/netfilter_ipv6.h> | |
c737b7c4 | 28 | #include <linux/netfilter_bridge.h> |
7af4cc3f HW |
29 | #include <linux/netfilter/nfnetlink.h> |
30 | #include <linux/netfilter/nfnetlink_queue.h> | |
b7bd1809 | 31 | #include <linux/netfilter/nf_conntrack_common.h> |
7af4cc3f HW |
32 | #include <linux/list.h> |
33 | #include <net/sock.h> | |
83111e7f | 34 | #include <net/tcp_states.h> |
c01cd429 | 35 | #include <net/netfilter/nf_queue.h> |
e8179610 | 36 | #include <net/netns/generic.h> |
7af4cc3f | 37 | |
60063497 | 38 | #include <linux/atomic.h> |
7af4cc3f | 39 | |
1109a90c | 40 | #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) |
fbcd923c HW |
41 | #include "../bridge/br_private.h" |
42 | #endif | |
43 | ||
7af4cc3f HW |
44 | #define NFQNL_QMAX_DEFAULT 1024 |
45 | ||
9cefbbc9 FW |
46 | /* We're using struct nlattr which has 16bit nla_len. Note that nla_len |
47 | * includes the header length. Thus, the maximum packet length that we | |
48 | * support is 65531 bytes. We send truncated packets if the specified length | |
49 | * is larger than that. Userspace can check for presence of NFQA_CAP_LEN | |
50 | * attribute to detect truncation. | |
51 | */ | |
52 | #define NFQNL_MAX_COPY_RANGE (0xffff - NLA_HDRLEN) | |
53 | ||
7af4cc3f HW |
54 | struct nfqnl_instance { |
55 | struct hlist_node hlist; /* global list of queues */ | |
9872bec7 | 56 | struct rcu_head rcu; |
7af4cc3f | 57 | |
cc6bc448 | 58 | u32 peer_portid; |
7af4cc3f HW |
59 | unsigned int queue_maxlen; |
60 | unsigned int copy_range; | |
7af4cc3f HW |
61 | unsigned int queue_dropped; |
62 | unsigned int queue_user_dropped; | |
63 | ||
7af4cc3f HW |
64 | |
65 | u_int16_t queue_num; /* number of this queue */ | |
66 | u_int8_t copy_mode; | |
fdb694a0 | 67 | u_int32_t flags; /* Set using NFQA_CFG_FLAGS */ |
c463ac97 ED |
68 | /* |
69 | * Following fields are dirtied for each queued packet, | |
70 | * keep them in same cache line if possible. | |
71 | */ | |
72 | spinlock_t lock; | |
73 | unsigned int queue_total; | |
5863702a | 74 | unsigned int id_sequence; /* 'sequence' of pkt ids */ |
7af4cc3f HW |
75 | struct list_head queue_list; /* packets in queue */ |
76 | }; | |
77 | ||
02f014d8 | 78 | typedef int (*nfqnl_cmpfn)(struct nf_queue_entry *, unsigned long); |
7af4cc3f | 79 | |
e8179610 | 80 | static int nfnl_queue_net_id __read_mostly; |
7af4cc3f | 81 | |
7af4cc3f | 82 | #define INSTANCE_BUCKETS 16 |
e8179610 G |
83 | struct nfnl_queue_net { |
84 | spinlock_t instances_lock; | |
85 | struct hlist_head instance_table[INSTANCE_BUCKETS]; | |
86 | }; | |
87 | ||
88 | static struct nfnl_queue_net *nfnl_queue_pernet(struct net *net) | |
89 | { | |
90 | return net_generic(net, nfnl_queue_net_id); | |
91 | } | |
7af4cc3f HW |
92 | |
93 | static inline u_int8_t instance_hashfn(u_int16_t queue_num) | |
94 | { | |
1cdb0905 | 95 | return ((queue_num >> 8) ^ queue_num) % INSTANCE_BUCKETS; |
7af4cc3f HW |
96 | } |
97 | ||
98 | static struct nfqnl_instance * | |
e8179610 | 99 | instance_lookup(struct nfnl_queue_net *q, u_int16_t queue_num) |
7af4cc3f HW |
100 | { |
101 | struct hlist_head *head; | |
7af4cc3f HW |
102 | struct nfqnl_instance *inst; |
103 | ||
e8179610 | 104 | head = &q->instance_table[instance_hashfn(queue_num)]; |
b67bfe0d | 105 | hlist_for_each_entry_rcu(inst, head, hlist) { |
7af4cc3f HW |
106 | if (inst->queue_num == queue_num) |
107 | return inst; | |
108 | } | |
109 | return NULL; | |
110 | } | |
111 | ||
7af4cc3f | 112 | static struct nfqnl_instance * |
cc6bc448 | 113 | instance_create(struct nfnl_queue_net *q, u_int16_t queue_num, u32 portid) |
7af4cc3f | 114 | { |
baab2ce7 | 115 | struct nfqnl_instance *inst; |
9872bec7 | 116 | unsigned int h; |
baab2ce7 | 117 | int err; |
7af4cc3f | 118 | |
e8179610 G |
119 | spin_lock(&q->instances_lock); |
120 | if (instance_lookup(q, queue_num)) { | |
baab2ce7 | 121 | err = -EEXIST; |
7af4cc3f | 122 | goto out_unlock; |
baab2ce7 | 123 | } |
7af4cc3f | 124 | |
10dfdc69 | 125 | inst = kzalloc(sizeof(*inst), GFP_ATOMIC); |
baab2ce7 PM |
126 | if (!inst) { |
127 | err = -ENOMEM; | |
7af4cc3f | 128 | goto out_unlock; |
baab2ce7 | 129 | } |
7af4cc3f | 130 | |
7af4cc3f | 131 | inst->queue_num = queue_num; |
15e47304 | 132 | inst->peer_portid = portid; |
7af4cc3f | 133 | inst->queue_maxlen = NFQNL_QMAX_DEFAULT; |
9cefbbc9 | 134 | inst->copy_range = NFQNL_MAX_COPY_RANGE; |
7af4cc3f | 135 | inst->copy_mode = NFQNL_COPY_NONE; |
181a46a5 | 136 | spin_lock_init(&inst->lock); |
7af4cc3f HW |
137 | INIT_LIST_HEAD(&inst->queue_list); |
138 | ||
baab2ce7 PM |
139 | if (!try_module_get(THIS_MODULE)) { |
140 | err = -EAGAIN; | |
7af4cc3f | 141 | goto out_free; |
baab2ce7 | 142 | } |
7af4cc3f | 143 | |
9872bec7 | 144 | h = instance_hashfn(queue_num); |
e8179610 | 145 | hlist_add_head_rcu(&inst->hlist, &q->instance_table[h]); |
7af4cc3f | 146 | |
e8179610 | 147 | spin_unlock(&q->instances_lock); |
7af4cc3f | 148 | |
7af4cc3f HW |
149 | return inst; |
150 | ||
151 | out_free: | |
152 | kfree(inst); | |
153 | out_unlock: | |
e8179610 | 154 | spin_unlock(&q->instances_lock); |
baab2ce7 | 155 | return ERR_PTR(err); |
7af4cc3f HW |
156 | } |
157 | ||
b43d8d85 PM |
158 | static void nfqnl_flush(struct nfqnl_instance *queue, nfqnl_cmpfn cmpfn, |
159 | unsigned long data); | |
7af4cc3f HW |
160 | |
161 | static void | |
9872bec7 | 162 | instance_destroy_rcu(struct rcu_head *head) |
7af4cc3f | 163 | { |
9872bec7 PM |
164 | struct nfqnl_instance *inst = container_of(head, struct nfqnl_instance, |
165 | rcu); | |
7af4cc3f | 166 | |
b43d8d85 | 167 | nfqnl_flush(inst, NULL, 0); |
9872bec7 | 168 | kfree(inst); |
7af4cc3f HW |
169 | module_put(THIS_MODULE); |
170 | } | |
171 | ||
9872bec7 | 172 | static void |
7af4cc3f HW |
173 | __instance_destroy(struct nfqnl_instance *inst) |
174 | { | |
9872bec7 PM |
175 | hlist_del_rcu(&inst->hlist); |
176 | call_rcu(&inst->rcu, instance_destroy_rcu); | |
7af4cc3f HW |
177 | } |
178 | ||
9872bec7 | 179 | static void |
e8179610 | 180 | instance_destroy(struct nfnl_queue_net *q, struct nfqnl_instance *inst) |
7af4cc3f | 181 | { |
e8179610 | 182 | spin_lock(&q->instances_lock); |
9872bec7 | 183 | __instance_destroy(inst); |
e8179610 | 184 | spin_unlock(&q->instances_lock); |
7af4cc3f HW |
185 | } |
186 | ||
7af4cc3f | 187 | static inline void |
02f014d8 | 188 | __enqueue_entry(struct nfqnl_instance *queue, struct nf_queue_entry *entry) |
7af4cc3f | 189 | { |
0ac41e81 | 190 | list_add_tail(&entry->list, &queue->queue_list); |
7af4cc3f HW |
191 | queue->queue_total++; |
192 | } | |
193 | ||
97d32cf9 FW |
194 | static void |
195 | __dequeue_entry(struct nfqnl_instance *queue, struct nf_queue_entry *entry) | |
196 | { | |
197 | list_del(&entry->list); | |
198 | queue->queue_total--; | |
199 | } | |
200 | ||
02f014d8 | 201 | static struct nf_queue_entry * |
b43d8d85 | 202 | find_dequeue_entry(struct nfqnl_instance *queue, unsigned int id) |
7af4cc3f | 203 | { |
02f014d8 | 204 | struct nf_queue_entry *entry = NULL, *i; |
601e68e1 | 205 | |
7af4cc3f | 206 | spin_lock_bh(&queue->lock); |
b43d8d85 PM |
207 | |
208 | list_for_each_entry(i, &queue->queue_list, list) { | |
209 | if (i->id == id) { | |
210 | entry = i; | |
211 | break; | |
212 | } | |
213 | } | |
214 | ||
97d32cf9 FW |
215 | if (entry) |
216 | __dequeue_entry(queue, entry); | |
b43d8d85 | 217 | |
7af4cc3f HW |
218 | spin_unlock_bh(&queue->lock); |
219 | ||
220 | return entry; | |
221 | } | |
222 | ||
223 | static void | |
b43d8d85 | 224 | nfqnl_flush(struct nfqnl_instance *queue, nfqnl_cmpfn cmpfn, unsigned long data) |
7af4cc3f | 225 | { |
02f014d8 | 226 | struct nf_queue_entry *entry, *next; |
b43d8d85 | 227 | |
7af4cc3f | 228 | spin_lock_bh(&queue->lock); |
b43d8d85 PM |
229 | list_for_each_entry_safe(entry, next, &queue->queue_list, list) { |
230 | if (!cmpfn || cmpfn(entry, data)) { | |
231 | list_del(&entry->list); | |
232 | queue->queue_total--; | |
4b3d15ef | 233 | nf_reinject(entry, NF_DROP); |
b43d8d85 PM |
234 | } |
235 | } | |
7af4cc3f HW |
236 | spin_unlock_bh(&queue->lock); |
237 | } | |
238 | ||
496e4ae7 FW |
239 | static int |
240 | nfqnl_put_packet_info(struct sk_buff *nlskb, struct sk_buff *packet, | |
241 | bool csum_verify) | |
7237190d FW |
242 | { |
243 | __u32 flags = 0; | |
244 | ||
245 | if (packet->ip_summed == CHECKSUM_PARTIAL) | |
246 | flags = NFQA_SKB_CSUMNOTREADY; | |
496e4ae7 FW |
247 | else if (csum_verify) |
248 | flags = NFQA_SKB_CSUM_NOTVERIFIED; | |
249 | ||
7237190d FW |
250 | if (skb_is_gso(packet)) |
251 | flags |= NFQA_SKB_GSO; | |
252 | ||
253 | return flags ? nla_put_be32(nlskb, NFQA_SKB_INFO, htonl(flags)) : 0; | |
254 | } | |
255 | ||
08c0cad6 VG |
256 | static int nfqnl_put_sk_uidgid(struct sk_buff *skb, struct sock *sk) |
257 | { | |
258 | const struct cred *cred; | |
259 | ||
a8399231 | 260 | if (!sk_fullsock(sk)) |
08c0cad6 VG |
261 | return 0; |
262 | ||
263 | read_lock_bh(&sk->sk_callback_lock); | |
264 | if (sk->sk_socket && sk->sk_socket->file) { | |
265 | cred = sk->sk_socket->file->f_cred; | |
266 | if (nla_put_be32(skb, NFQA_UID, | |
267 | htonl(from_kuid_munged(&init_user_ns, cred->fsuid)))) | |
268 | goto nla_put_failure; | |
269 | if (nla_put_be32(skb, NFQA_GID, | |
270 | htonl(from_kgid_munged(&init_user_ns, cred->fsgid)))) | |
271 | goto nla_put_failure; | |
272 | } | |
273 | read_unlock_bh(&sk->sk_callback_lock); | |
274 | return 0; | |
275 | ||
276 | nla_put_failure: | |
277 | read_unlock_bh(&sk->sk_callback_lock); | |
278 | return -1; | |
279 | } | |
280 | ||
ef493bd9 RK |
281 | static u32 nfqnl_get_sk_secctx(struct sk_buff *skb, char **secdata) |
282 | { | |
283 | u32 seclen = 0; | |
284 | #if IS_ENABLED(CONFIG_NETWORK_SECMARK) | |
285 | if (!skb || !sk_fullsock(skb->sk)) | |
286 | return 0; | |
287 | ||
288 | read_lock_bh(&skb->sk->sk_callback_lock); | |
289 | ||
290 | if (skb->secmark) | |
291 | security_secid_to_secctx(skb->secmark, secdata, &seclen); | |
292 | ||
293 | read_unlock_bh(&skb->sk->sk_callback_lock); | |
294 | #endif | |
295 | return seclen; | |
296 | } | |
297 | ||
7af4cc3f | 298 | static struct sk_buff * |
74332687 | 299 | nfqnl_build_packet_message(struct net *net, struct nfqnl_instance *queue, |
5863702a ED |
300 | struct nf_queue_entry *entry, |
301 | __be32 **packet_id_ptr) | |
7af4cc3f | 302 | { |
7af4cc3f | 303 | size_t size; |
6bb0fef4 | 304 | size_t data_len = 0, cap_len = 0, rem_len = 0; |
af2806f8 | 305 | unsigned int hlen = 0; |
7af4cc3f | 306 | struct sk_buff *skb; |
5863702a ED |
307 | struct nlattr *nla; |
308 | struct nfqnl_msg_packet_hdr *pmsg; | |
7af4cc3f HW |
309 | struct nlmsghdr *nlh; |
310 | struct nfgenmsg *nfmsg; | |
3e4ead4f JJ |
311 | struct sk_buff *entskb = entry->skb; |
312 | struct net_device *indev; | |
313 | struct net_device *outdev; | |
9cb01766 PNA |
314 | struct nf_conn *ct = NULL; |
315 | enum ip_conntrack_info uninitialized_var(ctinfo); | |
a4b4766c | 316 | struct nfnl_ct_hook *nfnl_ct; |
496e4ae7 | 317 | bool csum_verify; |
ef493bd9 RK |
318 | char *secdata = NULL; |
319 | u32 seclen = 0; | |
7af4cc3f | 320 | |
573ce260 | 321 | size = nlmsg_total_size(sizeof(struct nfgenmsg)) |
df6fb868 PM |
322 | + nla_total_size(sizeof(struct nfqnl_msg_packet_hdr)) |
323 | + nla_total_size(sizeof(u_int32_t)) /* ifindex */ | |
324 | + nla_total_size(sizeof(u_int32_t)) /* ifindex */ | |
1109a90c | 325 | #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) |
df6fb868 PM |
326 | + nla_total_size(sizeof(u_int32_t)) /* ifindex */ |
327 | + nla_total_size(sizeof(u_int32_t)) /* ifindex */ | |
fbcd923c | 328 | #endif |
df6fb868 PM |
329 | + nla_total_size(sizeof(u_int32_t)) /* mark */ |
330 | + nla_total_size(sizeof(struct nfqnl_msg_packet_hw)) | |
7237190d | 331 | + nla_total_size(sizeof(u_int32_t)) /* skbinfo */ |
ae08ce00 ED |
332 | + nla_total_size(sizeof(u_int32_t)); /* cap_len */ |
333 | ||
334 | if (entskb->tstamp.tv64) | |
335 | size += nla_total_size(sizeof(struct nfqnl_msg_packet_timestamp)); | |
7af4cc3f | 336 | |
1d1de89b DM |
337 | if (entry->state.hook <= NF_INET_FORWARD || |
338 | (entry->state.hook == NF_INET_POST_ROUTING && entskb->sk == NULL)) | |
496e4ae7 FW |
339 | csum_verify = !skb_csum_unnecessary(entskb); |
340 | else | |
341 | csum_verify = false; | |
342 | ||
1d1de89b | 343 | outdev = entry->state.out; |
3e4ead4f | 344 | |
c463ac97 | 345 | switch ((enum nfqnl_config_mode)ACCESS_ONCE(queue->copy_mode)) { |
7af4cc3f HW |
346 | case NFQNL_COPY_META: |
347 | case NFQNL_COPY_NONE: | |
7af4cc3f | 348 | break; |
601e68e1 | 349 | |
7af4cc3f | 350 | case NFQNL_COPY_PACKET: |
00bd1cc2 FW |
351 | if (!(queue->flags & NFQA_CFG_F_GSO) && |
352 | entskb->ip_summed == CHECKSUM_PARTIAL && | |
c463ac97 | 353 | skb_checksum_help(entskb)) |
e7dfb09a | 354 | return NULL; |
c463ac97 ED |
355 | |
356 | data_len = ACCESS_ONCE(queue->copy_range); | |
9cefbbc9 | 357 | if (data_len > entskb->len) |
3e4ead4f | 358 | data_len = entskb->len; |
601e68e1 | 359 | |
af2806f8 TG |
360 | hlen = skb_zerocopy_headlen(entskb); |
361 | hlen = min_t(unsigned int, hlen, data_len); | |
ae08ce00 | 362 | size += sizeof(struct nlattr) + hlen; |
6ee584be | 363 | cap_len = entskb->len; |
6bb0fef4 | 364 | rem_len = data_len - hlen; |
7af4cc3f | 365 | break; |
7af4cc3f HW |
366 | } |
367 | ||
8e662164 AB |
368 | nfnl_ct = rcu_dereference(nfnl_ct_hook); |
369 | ||
b7bd1809 | 370 | if (queue->flags & NFQA_CFG_F_CONNTRACK) { |
a4b4766c KM |
371 | if (nfnl_ct != NULL) { |
372 | ct = nfnl_ct->get_ct(entskb, &ctinfo); | |
b7bd1809 | 373 | if (ct != NULL) |
a4b4766c | 374 | size += nfnl_ct->build_size(ct); |
b7bd1809 PNA |
375 | } |
376 | } | |
7af4cc3f | 377 | |
08c0cad6 VG |
378 | if (queue->flags & NFQA_CFG_F_UID_GID) { |
379 | size += (nla_total_size(sizeof(u_int32_t)) /* uid */ | |
380 | + nla_total_size(sizeof(u_int32_t))); /* gid */ | |
381 | } | |
382 | ||
ef493bd9 RK |
383 | if ((queue->flags & NFQA_CFG_F_SECCTX) && entskb->sk) { |
384 | seclen = nfqnl_get_sk_secctx(entskb, &secdata); | |
385 | if (seclen) | |
386 | size += nla_total_size(seclen); | |
387 | } | |
388 | ||
6bb0fef4 | 389 | skb = __netlink_alloc_skb(net->nfnl, size, rem_len, queue->peer_portid, |
3ab1f683 | 390 | GFP_ATOMIC); |
36d5fe6a ZK |
391 | if (!skb) { |
392 | skb_tx_error(entskb); | |
3da07c0c | 393 | return NULL; |
36d5fe6a | 394 | } |
601e68e1 | 395 | |
3da07c0c | 396 | nlh = nlmsg_put(skb, 0, 0, |
7af4cc3f | 397 | NFNL_SUBSYS_QUEUE << 8 | NFQNL_MSG_PACKET, |
3da07c0c DM |
398 | sizeof(struct nfgenmsg), 0); |
399 | if (!nlh) { | |
36d5fe6a | 400 | skb_tx_error(entskb); |
3da07c0c DM |
401 | kfree_skb(skb); |
402 | return NULL; | |
403 | } | |
404 | nfmsg = nlmsg_data(nlh); | |
1d1de89b | 405 | nfmsg->nfgen_family = entry->state.pf; |
7af4cc3f HW |
406 | nfmsg->version = NFNETLINK_V0; |
407 | nfmsg->res_id = htons(queue->queue_num); | |
408 | ||
5863702a ED |
409 | nla = __nla_reserve(skb, NFQA_PACKET_HDR, sizeof(*pmsg)); |
410 | pmsg = nla_data(nla); | |
411 | pmsg->hw_protocol = entskb->protocol; | |
1d1de89b | 412 | pmsg->hook = entry->state.hook; |
5863702a | 413 | *packet_id_ptr = &pmsg->packet_id; |
7af4cc3f | 414 | |
1d1de89b | 415 | indev = entry->state.in; |
3e4ead4f | 416 | if (indev) { |
1109a90c | 417 | #if !IS_ENABLED(CONFIG_BRIDGE_NETFILTER) |
a447189e DM |
418 | if (nla_put_be32(skb, NFQA_IFINDEX_INDEV, htonl(indev->ifindex))) |
419 | goto nla_put_failure; | |
fbcd923c | 420 | #else |
1d1de89b | 421 | if (entry->state.pf == PF_BRIDGE) { |
fbcd923c | 422 | /* Case 1: indev is physical input device, we need to |
601e68e1 | 423 | * look for bridge group (when called from |
fbcd923c | 424 | * netfilter_bridge) */ |
a447189e DM |
425 | if (nla_put_be32(skb, NFQA_IFINDEX_PHYSINDEV, |
426 | htonl(indev->ifindex)) || | |
fbcd923c | 427 | /* this is the bridge group "brX" */ |
f350a0a8 | 428 | /* rcu_read_lock()ed by __nf_queue */ |
a447189e DM |
429 | nla_put_be32(skb, NFQA_IFINDEX_INDEV, |
430 | htonl(br_port_get_rcu(indev)->br->dev->ifindex))) | |
431 | goto nla_put_failure; | |
fbcd923c | 432 | } else { |
c737b7c4 FW |
433 | int physinif; |
434 | ||
fbcd923c HW |
435 | /* Case 2: indev is bridge group, we need to look for |
436 | * physical device (when called from ipv4) */ | |
a447189e DM |
437 | if (nla_put_be32(skb, NFQA_IFINDEX_INDEV, |
438 | htonl(indev->ifindex))) | |
439 | goto nla_put_failure; | |
c737b7c4 FW |
440 | |
441 | physinif = nf_bridge_get_physinif(entskb); | |
442 | if (physinif && | |
a447189e | 443 | nla_put_be32(skb, NFQA_IFINDEX_PHYSINDEV, |
c737b7c4 | 444 | htonl(physinif))) |
a447189e | 445 | goto nla_put_failure; |
fbcd923c HW |
446 | } |
447 | #endif | |
7af4cc3f HW |
448 | } |
449 | ||
3e4ead4f | 450 | if (outdev) { |
1109a90c | 451 | #if !IS_ENABLED(CONFIG_BRIDGE_NETFILTER) |
a447189e DM |
452 | if (nla_put_be32(skb, NFQA_IFINDEX_OUTDEV, htonl(outdev->ifindex))) |
453 | goto nla_put_failure; | |
fbcd923c | 454 | #else |
1d1de89b | 455 | if (entry->state.pf == PF_BRIDGE) { |
fbcd923c | 456 | /* Case 1: outdev is physical output device, we need to |
601e68e1 | 457 | * look for bridge group (when called from |
fbcd923c | 458 | * netfilter_bridge) */ |
a447189e DM |
459 | if (nla_put_be32(skb, NFQA_IFINDEX_PHYSOUTDEV, |
460 | htonl(outdev->ifindex)) || | |
fbcd923c | 461 | /* this is the bridge group "brX" */ |
f350a0a8 | 462 | /* rcu_read_lock()ed by __nf_queue */ |
a447189e DM |
463 | nla_put_be32(skb, NFQA_IFINDEX_OUTDEV, |
464 | htonl(br_port_get_rcu(outdev)->br->dev->ifindex))) | |
465 | goto nla_put_failure; | |
fbcd923c | 466 | } else { |
c737b7c4 FW |
467 | int physoutif; |
468 | ||
fbcd923c HW |
469 | /* Case 2: outdev is bridge group, we need to look for |
470 | * physical output device (when called from ipv4) */ | |
a447189e DM |
471 | if (nla_put_be32(skb, NFQA_IFINDEX_OUTDEV, |
472 | htonl(outdev->ifindex))) | |
473 | goto nla_put_failure; | |
c737b7c4 FW |
474 | |
475 | physoutif = nf_bridge_get_physoutif(entskb); | |
476 | if (physoutif && | |
a447189e | 477 | nla_put_be32(skb, NFQA_IFINDEX_PHYSOUTDEV, |
c737b7c4 | 478 | htonl(physoutif))) |
a447189e | 479 | goto nla_put_failure; |
fbcd923c HW |
480 | } |
481 | #endif | |
7af4cc3f HW |
482 | } |
483 | ||
a447189e DM |
484 | if (entskb->mark && |
485 | nla_put_be32(skb, NFQA_MARK, htonl(entskb->mark))) | |
486 | goto nla_put_failure; | |
7af4cc3f | 487 | |
2c38de4c NC |
488 | if (indev && entskb->dev && |
489 | entskb->mac_header != entskb->network_header) { | |
7af4cc3f | 490 | struct nfqnl_msg_packet_hw phw; |
e4d091d7 DC |
491 | int len; |
492 | ||
493 | memset(&phw, 0, sizeof(phw)); | |
494 | len = dev_parse_header(entskb, phw.hw_addr); | |
b95cce35 SH |
495 | if (len) { |
496 | phw.hw_addrlen = htons(len); | |
a447189e DM |
497 | if (nla_put(skb, NFQA_HWADDR, sizeof(phw), &phw)) |
498 | goto nla_put_failure; | |
b95cce35 | 499 | } |
7af4cc3f HW |
500 | } |
501 | ||
b7aa0bf7 | 502 | if (entskb->tstamp.tv64) { |
7af4cc3f | 503 | struct nfqnl_msg_packet_timestamp ts; |
b28b1e82 PNA |
504 | struct timespec64 kts = ktime_to_timespec64(skb->tstamp); |
505 | ||
506 | ts.sec = cpu_to_be64(kts.tv_sec); | |
507 | ts.usec = cpu_to_be64(kts.tv_nsec / NSEC_PER_USEC); | |
7af4cc3f | 508 | |
a447189e DM |
509 | if (nla_put(skb, NFQA_TIMESTAMP, sizeof(ts), &ts)) |
510 | goto nla_put_failure; | |
7af4cc3f HW |
511 | } |
512 | ||
08c0cad6 VG |
513 | if ((queue->flags & NFQA_CFG_F_UID_GID) && entskb->sk && |
514 | nfqnl_put_sk_uidgid(skb, entskb->sk) < 0) | |
515 | goto nla_put_failure; | |
516 | ||
ef493bd9 RK |
517 | if (seclen && nla_put(skb, NFQA_SECCTX, seclen, secdata)) |
518 | goto nla_put_failure; | |
519 | ||
a4b4766c | 520 | if (ct && nfnl_ct->build(skb, ct, ctinfo, NFQA_CT, NFQA_CT_INFO) < 0) |
ae08ce00 ED |
521 | goto nla_put_failure; |
522 | ||
7f87712c FW |
523 | if (cap_len > data_len && |
524 | nla_put_be32(skb, NFQA_CAP_LEN, htonl(cap_len))) | |
ae08ce00 ED |
525 | goto nla_put_failure; |
526 | ||
496e4ae7 | 527 | if (nfqnl_put_packet_info(skb, entskb, csum_verify)) |
7237190d FW |
528 | goto nla_put_failure; |
529 | ||
7af4cc3f | 530 | if (data_len) { |
df6fb868 | 531 | struct nlattr *nla; |
7af4cc3f | 532 | |
ae08ce00 ED |
533 | if (skb_tailroom(skb) < sizeof(*nla) + hlen) |
534 | goto nla_put_failure; | |
7af4cc3f | 535 | |
ae08ce00 | 536 | nla = (struct nlattr *)skb_put(skb, sizeof(*nla)); |
df6fb868 | 537 | nla->nla_type = NFQA_PAYLOAD; |
ae08ce00 | 538 | nla->nla_len = nla_attr_size(data_len); |
7af4cc3f | 539 | |
36d5fe6a ZK |
540 | if (skb_zerocopy(skb, entskb, data_len, hlen)) |
541 | goto nla_put_failure; | |
7af4cc3f | 542 | } |
601e68e1 | 543 | |
ae08ce00 | 544 | nlh->nlmsg_len = skb->len; |
7af4cc3f HW |
545 | return skb; |
546 | ||
df6fb868 | 547 | nla_put_failure: |
36d5fe6a | 548 | skb_tx_error(entskb); |
a6729955 | 549 | kfree_skb(skb); |
e87cc472 | 550 | net_err_ratelimited("nf_queue: error creating packet message\n"); |
7af4cc3f HW |
551 | return NULL; |
552 | } | |
553 | ||
554 | static int | |
a5fedd43 FW |
555 | __nfqnl_enqueue_packet(struct net *net, struct nfqnl_instance *queue, |
556 | struct nf_queue_entry *entry) | |
7af4cc3f | 557 | { |
7af4cc3f | 558 | struct sk_buff *nskb; |
f1585086 | 559 | int err = -ENOBUFS; |
5863702a | 560 | __be32 *packet_id_ptr; |
fdb694a0 | 561 | int failopen = 0; |
7af4cc3f | 562 | |
74332687 | 563 | nskb = nfqnl_build_packet_message(net, queue, entry, &packet_id_ptr); |
f1585086 FW |
564 | if (nskb == NULL) { |
565 | err = -ENOMEM; | |
0ef0f465 | 566 | goto err_out; |
f1585086 | 567 | } |
7af4cc3f | 568 | spin_lock_bh(&queue->lock); |
601e68e1 | 569 | |
7af4cc3f | 570 | if (queue->queue_total >= queue->queue_maxlen) { |
fdb694a0 KK |
571 | if (queue->flags & NFQA_CFG_F_FAIL_OPEN) { |
572 | failopen = 1; | |
573 | err = 0; | |
574 | } else { | |
575 | queue->queue_dropped++; | |
576 | net_warn_ratelimited("nf_queue: full at %d entries, dropping packets(s)\n", | |
577 | queue->queue_total); | |
578 | } | |
7af4cc3f HW |
579 | goto err_out_free_nskb; |
580 | } | |
5863702a ED |
581 | entry->id = ++queue->id_sequence; |
582 | *packet_id_ptr = htonl(entry->id); | |
7af4cc3f HW |
583 | |
584 | /* nfnetlink_unicast will either free the nskb or add it to a socket */ | |
e8179610 | 585 | err = nfnetlink_unicast(nskb, net, queue->peer_portid, MSG_DONTWAIT); |
0ef0f465 | 586 | if (err < 0) { |
601e68e1 | 587 | queue->queue_user_dropped++; |
7af4cc3f HW |
588 | goto err_out_unlock; |
589 | } | |
590 | ||
591 | __enqueue_entry(queue, entry); | |
592 | ||
593 | spin_unlock_bh(&queue->lock); | |
0ef0f465 | 594 | return 0; |
7af4cc3f HW |
595 | |
596 | err_out_free_nskb: | |
601e68e1 | 597 | kfree_skb(nskb); |
7af4cc3f HW |
598 | err_out_unlock: |
599 | spin_unlock_bh(&queue->lock); | |
fdb694a0 KK |
600 | if (failopen) |
601 | nf_reinject(entry, NF_ACCEPT); | |
0ef0f465 | 602 | err_out: |
f1585086 | 603 | return err; |
7af4cc3f HW |
604 | } |
605 | ||
a5fedd43 FW |
606 | static struct nf_queue_entry * |
607 | nf_queue_entry_dup(struct nf_queue_entry *e) | |
608 | { | |
609 | struct nf_queue_entry *entry = kmemdup(e, e->size, GFP_ATOMIC); | |
ed78d09d FW |
610 | if (entry) |
611 | nf_queue_entry_get_refs(entry); | |
612 | return entry; | |
a5fedd43 FW |
613 | } |
614 | ||
1109a90c | 615 | #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) |
a5fedd43 FW |
616 | /* When called from bridge netfilter, skb->data must point to MAC header |
617 | * before calling skb_gso_segment(). Else, original MAC header is lost | |
618 | * and segmented skbs will be sent to wrong destination. | |
619 | */ | |
620 | static void nf_bridge_adjust_skb_data(struct sk_buff *skb) | |
621 | { | |
622 | if (skb->nf_bridge) | |
623 | __skb_push(skb, skb->network_header - skb->mac_header); | |
624 | } | |
625 | ||
626 | static void nf_bridge_adjust_segmented_data(struct sk_buff *skb) | |
627 | { | |
628 | if (skb->nf_bridge) | |
629 | __skb_pull(skb, skb->network_header - skb->mac_header); | |
630 | } | |
631 | #else | |
632 | #define nf_bridge_adjust_skb_data(s) do {} while (0) | |
633 | #define nf_bridge_adjust_segmented_data(s) do {} while (0) | |
634 | #endif | |
635 | ||
636 | static void free_entry(struct nf_queue_entry *entry) | |
637 | { | |
638 | nf_queue_entry_release_refs(entry); | |
639 | kfree(entry); | |
640 | } | |
641 | ||
642 | static int | |
643 | __nfqnl_enqueue_packet_gso(struct net *net, struct nfqnl_instance *queue, | |
644 | struct sk_buff *skb, struct nf_queue_entry *entry) | |
645 | { | |
646 | int ret = -ENOMEM; | |
647 | struct nf_queue_entry *entry_seg; | |
648 | ||
649 | nf_bridge_adjust_segmented_data(skb); | |
650 | ||
651 | if (skb->next == NULL) { /* last packet, no need to copy entry */ | |
652 | struct sk_buff *gso_skb = entry->skb; | |
653 | entry->skb = skb; | |
654 | ret = __nfqnl_enqueue_packet(net, queue, entry); | |
655 | if (ret) | |
656 | entry->skb = gso_skb; | |
657 | return ret; | |
658 | } | |
659 | ||
660 | skb->next = NULL; | |
661 | ||
662 | entry_seg = nf_queue_entry_dup(entry); | |
663 | if (entry_seg) { | |
664 | entry_seg->skb = skb; | |
665 | ret = __nfqnl_enqueue_packet(net, queue, entry_seg); | |
666 | if (ret) | |
667 | free_entry(entry_seg); | |
668 | } | |
669 | return ret; | |
670 | } | |
671 | ||
672 | static int | |
673 | nfqnl_enqueue_packet(struct nf_queue_entry *entry, unsigned int queuenum) | |
674 | { | |
675 | unsigned int queued; | |
676 | struct nfqnl_instance *queue; | |
677 | struct sk_buff *skb, *segs; | |
678 | int err = -ENOBUFS; | |
9dff2c96 | 679 | struct net *net = entry->state.net; |
a5fedd43 FW |
680 | struct nfnl_queue_net *q = nfnl_queue_pernet(net); |
681 | ||
682 | /* rcu_read_lock()ed by nf_hook_slow() */ | |
683 | queue = instance_lookup(q, queuenum); | |
684 | if (!queue) | |
685 | return -ESRCH; | |
686 | ||
687 | if (queue->copy_mode == NFQNL_COPY_NONE) | |
688 | return -EINVAL; | |
689 | ||
a5fedd43 FW |
690 | skb = entry->skb; |
691 | ||
1d1de89b | 692 | switch (entry->state.pf) { |
a5fedd43 FW |
693 | case NFPROTO_IPV4: |
694 | skb->protocol = htons(ETH_P_IP); | |
695 | break; | |
696 | case NFPROTO_IPV6: | |
697 | skb->protocol = htons(ETH_P_IPV6); | |
698 | break; | |
699 | } | |
700 | ||
7b8dfe28 PNA |
701 | if ((queue->flags & NFQA_CFG_F_GSO) || !skb_is_gso(skb)) |
702 | return __nfqnl_enqueue_packet(net, queue, entry); | |
703 | ||
a5fedd43 FW |
704 | nf_bridge_adjust_skb_data(skb); |
705 | segs = skb_gso_segment(skb, 0); | |
706 | /* Does not use PTR_ERR to limit the number of error codes that can be | |
ed78d09d | 707 | * returned by nf_queue. For instance, callers rely on -ESRCH to |
a5fedd43 FW |
708 | * mean 'ignore this hook'. |
709 | */ | |
330966e5 | 710 | if (IS_ERR_OR_NULL(segs)) |
a5fedd43 FW |
711 | goto out_err; |
712 | queued = 0; | |
713 | err = 0; | |
714 | do { | |
715 | struct sk_buff *nskb = segs->next; | |
716 | if (err == 0) | |
717 | err = __nfqnl_enqueue_packet_gso(net, queue, | |
718 | segs, entry); | |
719 | if (err == 0) | |
720 | queued++; | |
721 | else | |
722 | kfree_skb(segs); | |
723 | segs = nskb; | |
724 | } while (segs); | |
725 | ||
726 | if (queued) { | |
727 | if (err) /* some segments are already queued */ | |
728 | free_entry(entry); | |
729 | kfree_skb(skb); | |
730 | return 0; | |
731 | } | |
732 | out_err: | |
733 | nf_bridge_adjust_segmented_data(skb); | |
734 | return err; | |
735 | } | |
736 | ||
7af4cc3f | 737 | static int |
8c88f87c | 738 | nfqnl_mangle(void *data, int data_len, struct nf_queue_entry *e, int diff) |
7af4cc3f | 739 | { |
e2b58a67 | 740 | struct sk_buff *nskb; |
7af4cc3f | 741 | |
d8a585d7 PM |
742 | if (diff < 0) { |
743 | if (pskb_trim(e->skb, data_len)) | |
744 | return -ENOMEM; | |
745 | } else if (diff > 0) { | |
7af4cc3f HW |
746 | if (data_len > 0xFFFF) |
747 | return -EINVAL; | |
748 | if (diff > skb_tailroom(e->skb)) { | |
9a732ed6 AE |
749 | nskb = skb_copy_expand(e->skb, skb_headroom(e->skb), |
750 | diff, GFP_ATOMIC); | |
e2b58a67 | 751 | if (!nskb) { |
1158ba27 | 752 | printk(KERN_WARNING "nf_queue: OOM " |
7af4cc3f | 753 | "in mangle, dropping packet\n"); |
e2b58a67 | 754 | return -ENOMEM; |
7af4cc3f | 755 | } |
e2b58a67 PM |
756 | kfree_skb(e->skb); |
757 | e->skb = nskb; | |
7af4cc3f HW |
758 | } |
759 | skb_put(e->skb, diff); | |
760 | } | |
37d41879 | 761 | if (!skb_make_writable(e->skb, data_len)) |
7af4cc3f | 762 | return -ENOMEM; |
27d7ff46 | 763 | skb_copy_to_linear_data(e->skb, data, data_len); |
e7dfb09a | 764 | e->skb->ip_summed = CHECKSUM_NONE; |
7af4cc3f HW |
765 | return 0; |
766 | } | |
767 | ||
7af4cc3f HW |
768 | static int |
769 | nfqnl_set_mode(struct nfqnl_instance *queue, | |
770 | unsigned char mode, unsigned int range) | |
771 | { | |
c5de0dfd | 772 | int status = 0; |
7af4cc3f HW |
773 | |
774 | spin_lock_bh(&queue->lock); | |
c5de0dfd PM |
775 | switch (mode) { |
776 | case NFQNL_COPY_NONE: | |
777 | case NFQNL_COPY_META: | |
778 | queue->copy_mode = mode; | |
779 | queue->copy_range = 0; | |
780 | break; | |
781 | ||
782 | case NFQNL_COPY_PACKET: | |
783 | queue->copy_mode = mode; | |
9cefbbc9 FW |
784 | if (range == 0 || range > NFQNL_MAX_COPY_RANGE) |
785 | queue->copy_range = NFQNL_MAX_COPY_RANGE; | |
c5de0dfd PM |
786 | else |
787 | queue->copy_range = range; | |
788 | break; | |
789 | ||
790 | default: | |
791 | status = -EINVAL; | |
792 | ||
793 | } | |
7af4cc3f HW |
794 | spin_unlock_bh(&queue->lock); |
795 | ||
796 | return status; | |
797 | } | |
798 | ||
799 | static int | |
02f014d8 | 800 | dev_cmp(struct nf_queue_entry *entry, unsigned long ifindex) |
7af4cc3f | 801 | { |
1d1de89b DM |
802 | if (entry->state.in) |
803 | if (entry->state.in->ifindex == ifindex) | |
7af4cc3f | 804 | return 1; |
1d1de89b DM |
805 | if (entry->state.out) |
806 | if (entry->state.out->ifindex == ifindex) | |
7af4cc3f | 807 | return 1; |
1109a90c | 808 | #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) |
ef47c6a7 | 809 | if (entry->skb->nf_bridge) { |
c737b7c4 FW |
810 | int physinif, physoutif; |
811 | ||
812 | physinif = nf_bridge_get_physinif(entry->skb); | |
813 | physoutif = nf_bridge_get_physoutif(entry->skb); | |
814 | ||
815 | if (physinif == ifindex || physoutif == ifindex) | |
ef47c6a7 PM |
816 | return 1; |
817 | } | |
818 | #endif | |
7af4cc3f HW |
819 | return 0; |
820 | } | |
821 | ||
822 | /* drop all packets with either indev or outdev == ifindex from all queue | |
823 | * instances */ | |
824 | static void | |
e8179610 | 825 | nfqnl_dev_drop(struct net *net, int ifindex) |
7af4cc3f HW |
826 | { |
827 | int i; | |
e8179610 | 828 | struct nfnl_queue_net *q = nfnl_queue_pernet(net); |
601e68e1 | 829 | |
9872bec7 | 830 | rcu_read_lock(); |
7af4cc3f | 831 | |
9872bec7 | 832 | for (i = 0; i < INSTANCE_BUCKETS; i++) { |
7af4cc3f | 833 | struct nfqnl_instance *inst; |
e8179610 | 834 | struct hlist_head *head = &q->instance_table[i]; |
7af4cc3f | 835 | |
b67bfe0d | 836 | hlist_for_each_entry_rcu(inst, head, hlist) |
b43d8d85 | 837 | nfqnl_flush(inst, dev_cmp, ifindex); |
7af4cc3f HW |
838 | } |
839 | ||
9872bec7 | 840 | rcu_read_unlock(); |
7af4cc3f HW |
841 | } |
842 | ||
7af4cc3f HW |
843 | static int |
844 | nfqnl_rcv_dev_event(struct notifier_block *this, | |
845 | unsigned long event, void *ptr) | |
846 | { | |
351638e7 | 847 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
7af4cc3f HW |
848 | |
849 | /* Drop any packets associated with the downed device */ | |
850 | if (event == NETDEV_DOWN) | |
e8179610 | 851 | nfqnl_dev_drop(dev_net(dev), dev->ifindex); |
7af4cc3f HW |
852 | return NOTIFY_DONE; |
853 | } | |
854 | ||
855 | static struct notifier_block nfqnl_dev_notifier = { | |
856 | .notifier_call = nfqnl_rcv_dev_event, | |
857 | }; | |
858 | ||
8405a8ff EB |
859 | static int nf_hook_cmp(struct nf_queue_entry *entry, unsigned long ops_ptr) |
860 | { | |
861 | return entry->elem == (struct nf_hook_ops *)ops_ptr; | |
862 | } | |
863 | ||
864 | static void nfqnl_nf_hook_drop(struct net *net, struct nf_hook_ops *hook) | |
865 | { | |
866 | struct nfnl_queue_net *q = nfnl_queue_pernet(net); | |
867 | int i; | |
868 | ||
869 | rcu_read_lock(); | |
870 | for (i = 0; i < INSTANCE_BUCKETS; i++) { | |
871 | struct nfqnl_instance *inst; | |
872 | struct hlist_head *head = &q->instance_table[i]; | |
873 | ||
874 | hlist_for_each_entry_rcu(inst, head, hlist) | |
875 | nfqnl_flush(inst, nf_hook_cmp, (unsigned long)hook); | |
876 | } | |
877 | rcu_read_unlock(); | |
878 | } | |
879 | ||
7af4cc3f HW |
880 | static int |
881 | nfqnl_rcv_nl_event(struct notifier_block *this, | |
882 | unsigned long event, void *ptr) | |
883 | { | |
884 | struct netlink_notify *n = ptr; | |
e8179610 | 885 | struct nfnl_queue_net *q = nfnl_queue_pernet(n->net); |
7af4cc3f | 886 | |
dee5817e | 887 | if (event == NETLINK_URELEASE && n->protocol == NETLINK_NETFILTER) { |
7af4cc3f HW |
888 | int i; |
889 | ||
15e47304 | 890 | /* destroy all instances for this portid */ |
e8179610 | 891 | spin_lock(&q->instances_lock); |
9872bec7 | 892 | for (i = 0; i < INSTANCE_BUCKETS; i++) { |
b67bfe0d | 893 | struct hlist_node *t2; |
7af4cc3f | 894 | struct nfqnl_instance *inst; |
e8179610 | 895 | struct hlist_head *head = &q->instance_table[i]; |
7af4cc3f | 896 | |
b67bfe0d | 897 | hlist_for_each_entry_safe(inst, t2, head, hlist) { |
e8179610 | 898 | if (n->portid == inst->peer_portid) |
7af4cc3f HW |
899 | __instance_destroy(inst); |
900 | } | |
901 | } | |
e8179610 | 902 | spin_unlock(&q->instances_lock); |
7af4cc3f HW |
903 | } |
904 | return NOTIFY_DONE; | |
905 | } | |
906 | ||
907 | static struct notifier_block nfqnl_rtnl_notifier = { | |
908 | .notifier_call = nfqnl_rcv_nl_event, | |
909 | }; | |
910 | ||
5bf75853 PM |
911 | static const struct nla_policy nfqa_verdict_policy[NFQA_MAX+1] = { |
912 | [NFQA_VERDICT_HDR] = { .len = sizeof(struct nfqnl_msg_verdict_hdr) }, | |
913 | [NFQA_MARK] = { .type = NLA_U32 }, | |
914 | [NFQA_PAYLOAD] = { .type = NLA_UNSPEC }, | |
9cb01766 | 915 | [NFQA_CT] = { .type = NLA_UNSPEC }, |
bd077937 | 916 | [NFQA_EXP] = { .type = NLA_UNSPEC }, |
838ab636 HW |
917 | }; |
918 | ||
97d32cf9 FW |
919 | static const struct nla_policy nfqa_verdict_batch_policy[NFQA_MAX+1] = { |
920 | [NFQA_VERDICT_HDR] = { .len = sizeof(struct nfqnl_msg_verdict_hdr) }, | |
921 | [NFQA_MARK] = { .type = NLA_U32 }, | |
922 | }; | |
923 | ||
e8179610 | 924 | static struct nfqnl_instance * |
cc6bc448 | 925 | verdict_instance_lookup(struct nfnl_queue_net *q, u16 queue_num, u32 nlportid) |
97d32cf9 FW |
926 | { |
927 | struct nfqnl_instance *queue; | |
928 | ||
e8179610 | 929 | queue = instance_lookup(q, queue_num); |
97d32cf9 FW |
930 | if (!queue) |
931 | return ERR_PTR(-ENODEV); | |
932 | ||
15e47304 | 933 | if (queue->peer_portid != nlportid) |
97d32cf9 FW |
934 | return ERR_PTR(-EPERM); |
935 | ||
936 | return queue; | |
937 | } | |
938 | ||
939 | static struct nfqnl_msg_verdict_hdr* | |
940 | verdicthdr_get(const struct nlattr * const nfqa[]) | |
941 | { | |
942 | struct nfqnl_msg_verdict_hdr *vhdr; | |
943 | unsigned int verdict; | |
944 | ||
945 | if (!nfqa[NFQA_VERDICT_HDR]) | |
946 | return NULL; | |
947 | ||
948 | vhdr = nla_data(nfqa[NFQA_VERDICT_HDR]); | |
c6675233 FW |
949 | verdict = ntohl(vhdr->verdict) & NF_VERDICT_MASK; |
950 | if (verdict > NF_MAX_VERDICT || verdict == NF_STOLEN) | |
97d32cf9 FW |
951 | return NULL; |
952 | return vhdr; | |
953 | } | |
954 | ||
955 | static int nfq_id_after(unsigned int id, unsigned int max) | |
956 | { | |
957 | return (int)(id - max) > 0; | |
958 | } | |
959 | ||
960 | static int | |
961 | nfqnl_recv_verdict_batch(struct sock *ctnl, struct sk_buff *skb, | |
962 | const struct nlmsghdr *nlh, | |
963 | const struct nlattr * const nfqa[]) | |
964 | { | |
3da07c0c | 965 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
97d32cf9 FW |
966 | struct nf_queue_entry *entry, *tmp; |
967 | unsigned int verdict, maxid; | |
968 | struct nfqnl_msg_verdict_hdr *vhdr; | |
969 | struct nfqnl_instance *queue; | |
970 | LIST_HEAD(batch_list); | |
971 | u16 queue_num = ntohs(nfmsg->res_id); | |
972 | ||
e8179610 G |
973 | struct net *net = sock_net(ctnl); |
974 | struct nfnl_queue_net *q = nfnl_queue_pernet(net); | |
975 | ||
976 | queue = verdict_instance_lookup(q, queue_num, | |
977 | NETLINK_CB(skb).portid); | |
97d32cf9 FW |
978 | if (IS_ERR(queue)) |
979 | return PTR_ERR(queue); | |
980 | ||
981 | vhdr = verdicthdr_get(nfqa); | |
982 | if (!vhdr) | |
983 | return -EINVAL; | |
984 | ||
985 | verdict = ntohl(vhdr->verdict); | |
986 | maxid = ntohl(vhdr->id); | |
987 | ||
988 | spin_lock_bh(&queue->lock); | |
989 | ||
990 | list_for_each_entry_safe(entry, tmp, &queue->queue_list, list) { | |
991 | if (nfq_id_after(entry->id, maxid)) | |
992 | break; | |
993 | __dequeue_entry(queue, entry); | |
994 | list_add_tail(&entry->list, &batch_list); | |
995 | } | |
996 | ||
997 | spin_unlock_bh(&queue->lock); | |
998 | ||
999 | if (list_empty(&batch_list)) | |
1000 | return -ENOENT; | |
1001 | ||
1002 | list_for_each_entry_safe(entry, tmp, &batch_list, list) { | |
1003 | if (nfqa[NFQA_MARK]) | |
1004 | entry->skb->mark = ntohl(nla_get_be32(nfqa[NFQA_MARK])); | |
1005 | nf_reinject(entry, verdict); | |
1006 | } | |
1007 | return 0; | |
1008 | } | |
1009 | ||
a4b4766c | 1010 | static struct nf_conn *nfqnl_ct_parse(struct nfnl_ct_hook *nfnl_ct, |
b7bd1809 PNA |
1011 | const struct nlmsghdr *nlh, |
1012 | const struct nlattr * const nfqa[], | |
1013 | struct nf_queue_entry *entry, | |
1014 | enum ip_conntrack_info *ctinfo) | |
1015 | { | |
1016 | struct nf_conn *ct; | |
1017 | ||
a4b4766c | 1018 | ct = nfnl_ct->get_ct(entry->skb, ctinfo); |
b7bd1809 PNA |
1019 | if (ct == NULL) |
1020 | return NULL; | |
1021 | ||
a4b4766c | 1022 | if (nfnl_ct->parse(nfqa[NFQA_CT], ct) < 0) |
b7bd1809 PNA |
1023 | return NULL; |
1024 | ||
1025 | if (nfqa[NFQA_EXP]) | |
a4b4766c | 1026 | nfnl_ct->attach_expect(nfqa[NFQA_EXP], ct, |
b7bd1809 PNA |
1027 | NETLINK_CB(entry->skb).portid, |
1028 | nlmsg_report(nlh)); | |
1029 | return ct; | |
1030 | } | |
1031 | ||
7af4cc3f HW |
1032 | static int |
1033 | nfqnl_recv_verdict(struct sock *ctnl, struct sk_buff *skb, | |
39938324 PM |
1034 | const struct nlmsghdr *nlh, |
1035 | const struct nlattr * const nfqa[]) | |
7af4cc3f | 1036 | { |
3da07c0c | 1037 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
7af4cc3f HW |
1038 | u_int16_t queue_num = ntohs(nfmsg->res_id); |
1039 | ||
1040 | struct nfqnl_msg_verdict_hdr *vhdr; | |
1041 | struct nfqnl_instance *queue; | |
1042 | unsigned int verdict; | |
02f014d8 | 1043 | struct nf_queue_entry *entry; |
8c88f87c | 1044 | enum ip_conntrack_info uninitialized_var(ctinfo); |
a4b4766c | 1045 | struct nfnl_ct_hook *nfnl_ct; |
8c88f87c | 1046 | struct nf_conn *ct = NULL; |
7af4cc3f | 1047 | |
e8179610 G |
1048 | struct net *net = sock_net(ctnl); |
1049 | struct nfnl_queue_net *q = nfnl_queue_pernet(net); | |
7af4cc3f | 1050 | |
e8179610 G |
1051 | queue = instance_lookup(q, queue_num); |
1052 | if (!queue) | |
1053 | queue = verdict_instance_lookup(q, queue_num, | |
1054 | NETLINK_CB(skb).portid); | |
97d32cf9 FW |
1055 | if (IS_ERR(queue)) |
1056 | return PTR_ERR(queue); | |
7af4cc3f | 1057 | |
97d32cf9 FW |
1058 | vhdr = verdicthdr_get(nfqa); |
1059 | if (!vhdr) | |
84a797dd | 1060 | return -EINVAL; |
7af4cc3f | 1061 | |
7af4cc3f HW |
1062 | verdict = ntohl(vhdr->verdict); |
1063 | ||
b43d8d85 | 1064 | entry = find_dequeue_entry(queue, ntohl(vhdr->id)); |
84a797dd ED |
1065 | if (entry == NULL) |
1066 | return -ENOENT; | |
7af4cc3f | 1067 | |
8e662164 AB |
1068 | /* rcu lock already held from nfnl->call_rcu. */ |
1069 | nfnl_ct = rcu_dereference(nfnl_ct_hook); | |
1070 | ||
bd077937 | 1071 | if (nfqa[NFQA_CT]) { |
a4b4766c KM |
1072 | if (nfnl_ct != NULL) |
1073 | ct = nfqnl_ct_parse(nfnl_ct, nlh, nfqa, entry, &ctinfo); | |
bd077937 | 1074 | } |
9cb01766 | 1075 | |
df6fb868 | 1076 | if (nfqa[NFQA_PAYLOAD]) { |
8c88f87c PNA |
1077 | u16 payload_len = nla_len(nfqa[NFQA_PAYLOAD]); |
1078 | int diff = payload_len - entry->skb->len; | |
1079 | ||
df6fb868 | 1080 | if (nfqnl_mangle(nla_data(nfqa[NFQA_PAYLOAD]), |
8c88f87c | 1081 | payload_len, entry, diff) < 0) |
7af4cc3f | 1082 | verdict = NF_DROP; |
8c88f87c | 1083 | |
b7bd1809 | 1084 | if (ct && diff) |
a4b4766c | 1085 | nfnl_ct->seq_adjust(entry->skb, ct, ctinfo, diff); |
7af4cc3f HW |
1086 | } |
1087 | ||
df6fb868 | 1088 | if (nfqa[NFQA_MARK]) |
ea3a66ff | 1089 | entry->skb->mark = ntohl(nla_get_be32(nfqa[NFQA_MARK])); |
601e68e1 | 1090 | |
4b3d15ef | 1091 | nf_reinject(entry, verdict); |
7af4cc3f HW |
1092 | return 0; |
1093 | } | |
1094 | ||
1095 | static int | |
1096 | nfqnl_recv_unsupp(struct sock *ctnl, struct sk_buff *skb, | |
39938324 PM |
1097 | const struct nlmsghdr *nlh, |
1098 | const struct nlattr * const nfqa[]) | |
7af4cc3f HW |
1099 | { |
1100 | return -ENOTSUPP; | |
1101 | } | |
1102 | ||
5bf75853 PM |
1103 | static const struct nla_policy nfqa_cfg_policy[NFQA_CFG_MAX+1] = { |
1104 | [NFQA_CFG_CMD] = { .len = sizeof(struct nfqnl_msg_config_cmd) }, | |
1105 | [NFQA_CFG_PARAMS] = { .len = sizeof(struct nfqnl_msg_config_params) }, | |
838ab636 HW |
1106 | }; |
1107 | ||
e3ac5298 | 1108 | static const struct nf_queue_handler nfqh = { |
8405a8ff EB |
1109 | .outfn = &nfqnl_enqueue_packet, |
1110 | .nf_hook_drop = &nfqnl_nf_hook_drop, | |
bbd86b9f HW |
1111 | }; |
1112 | ||
7af4cc3f HW |
1113 | static int |
1114 | nfqnl_recv_config(struct sock *ctnl, struct sk_buff *skb, | |
39938324 PM |
1115 | const struct nlmsghdr *nlh, |
1116 | const struct nlattr * const nfqa[]) | |
7af4cc3f | 1117 | { |
3da07c0c | 1118 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
7af4cc3f HW |
1119 | u_int16_t queue_num = ntohs(nfmsg->res_id); |
1120 | struct nfqnl_instance *queue; | |
9872bec7 | 1121 | struct nfqnl_msg_config_cmd *cmd = NULL; |
e8179610 G |
1122 | struct net *net = sock_net(ctnl); |
1123 | struct nfnl_queue_net *q = nfnl_queue_pernet(net); | |
838ab636 | 1124 | int ret = 0; |
7af4cc3f | 1125 | |
9872bec7 PM |
1126 | if (nfqa[NFQA_CFG_CMD]) { |
1127 | cmd = nla_data(nfqa[NFQA_CFG_CMD]); | |
1128 | ||
0360ae41 | 1129 | /* Obsolete commands without queue context */ |
9872bec7 | 1130 | switch (cmd->command) { |
0360ae41 FW |
1131 | case NFQNL_CFG_CMD_PF_BIND: return 0; |
1132 | case NFQNL_CFG_CMD_PF_UNBIND: return 0; | |
9872bec7 | 1133 | } |
9872bec7 PM |
1134 | } |
1135 | ||
1136 | rcu_read_lock(); | |
e8179610 | 1137 | queue = instance_lookup(q, queue_num); |
15e47304 | 1138 | if (queue && queue->peer_portid != NETLINK_CB(skb).portid) { |
a3c8e7fd | 1139 | ret = -EPERM; |
9872bec7 | 1140 | goto err_out_unlock; |
a3c8e7fd PM |
1141 | } |
1142 | ||
9872bec7 | 1143 | if (cmd != NULL) { |
7af4cc3f HW |
1144 | switch (cmd->command) { |
1145 | case NFQNL_CFG_CMD_BIND: | |
9872bec7 PM |
1146 | if (queue) { |
1147 | ret = -EBUSY; | |
1148 | goto err_out_unlock; | |
1149 | } | |
e8179610 G |
1150 | queue = instance_create(q, queue_num, |
1151 | NETLINK_CB(skb).portid); | |
baab2ce7 PM |
1152 | if (IS_ERR(queue)) { |
1153 | ret = PTR_ERR(queue); | |
9872bec7 PM |
1154 | goto err_out_unlock; |
1155 | } | |
7af4cc3f HW |
1156 | break; |
1157 | case NFQNL_CFG_CMD_UNBIND: | |
9872bec7 PM |
1158 | if (!queue) { |
1159 | ret = -ENODEV; | |
1160 | goto err_out_unlock; | |
1161 | } | |
e8179610 | 1162 | instance_destroy(q, queue); |
7af4cc3f HW |
1163 | break; |
1164 | case NFQNL_CFG_CMD_PF_BIND: | |
7af4cc3f | 1165 | case NFQNL_CFG_CMD_PF_UNBIND: |
7af4cc3f HW |
1166 | break; |
1167 | default: | |
cd21f0ac | 1168 | ret = -ENOTSUPP; |
838ab636 | 1169 | break; |
7af4cc3f | 1170 | } |
7af4cc3f HW |
1171 | } |
1172 | ||
df6fb868 | 1173 | if (nfqa[NFQA_CFG_PARAMS]) { |
7af4cc3f | 1174 | struct nfqnl_msg_config_params *params; |
7af4cc3f | 1175 | |
406dbfc9 | 1176 | if (!queue) { |
a3c8e7fd | 1177 | ret = -ENODEV; |
9872bec7 | 1178 | goto err_out_unlock; |
406dbfc9 | 1179 | } |
df6fb868 | 1180 | params = nla_data(nfqa[NFQA_CFG_PARAMS]); |
7af4cc3f HW |
1181 | nfqnl_set_mode(queue, params->copy_mode, |
1182 | ntohl(params->copy_range)); | |
1183 | } | |
1184 | ||
df6fb868 | 1185 | if (nfqa[NFQA_CFG_QUEUE_MAXLEN]) { |
829e17a1 | 1186 | __be32 *queue_maxlen; |
a3c8e7fd PM |
1187 | |
1188 | if (!queue) { | |
1189 | ret = -ENODEV; | |
9872bec7 | 1190 | goto err_out_unlock; |
a3c8e7fd | 1191 | } |
df6fb868 | 1192 | queue_maxlen = nla_data(nfqa[NFQA_CFG_QUEUE_MAXLEN]); |
829e17a1 EL |
1193 | spin_lock_bh(&queue->lock); |
1194 | queue->queue_maxlen = ntohl(*queue_maxlen); | |
1195 | spin_unlock_bh(&queue->lock); | |
1196 | } | |
1197 | ||
fdb694a0 KK |
1198 | if (nfqa[NFQA_CFG_FLAGS]) { |
1199 | __u32 flags, mask; | |
1200 | ||
1201 | if (!queue) { | |
1202 | ret = -ENODEV; | |
1203 | goto err_out_unlock; | |
1204 | } | |
1205 | ||
1206 | if (!nfqa[NFQA_CFG_MASK]) { | |
1207 | /* A mask is needed to specify which flags are being | |
1208 | * changed. | |
1209 | */ | |
1210 | ret = -EINVAL; | |
1211 | goto err_out_unlock; | |
1212 | } | |
1213 | ||
1214 | flags = ntohl(nla_get_be32(nfqa[NFQA_CFG_FLAGS])); | |
1215 | mask = ntohl(nla_get_be32(nfqa[NFQA_CFG_MASK])); | |
1216 | ||
46ba5a25 KK |
1217 | if (flags >= NFQA_CFG_F_MAX) { |
1218 | ret = -EOPNOTSUPP; | |
1219 | goto err_out_unlock; | |
1220 | } | |
ef493bd9 RK |
1221 | #if !IS_ENABLED(CONFIG_NETWORK_SECMARK) |
1222 | if (flags & mask & NFQA_CFG_F_SECCTX) { | |
1223 | ret = -EOPNOTSUPP; | |
1224 | goto err_out_unlock; | |
1225 | } | |
1226 | #endif | |
fdb694a0 KK |
1227 | spin_lock_bh(&queue->lock); |
1228 | queue->flags &= ~mask; | |
1229 | queue->flags |= flags & mask; | |
1230 | spin_unlock_bh(&queue->lock); | |
1231 | } | |
1232 | ||
9872bec7 PM |
1233 | err_out_unlock: |
1234 | rcu_read_unlock(); | |
838ab636 | 1235 | return ret; |
7af4cc3f HW |
1236 | } |
1237 | ||
7c8d4cb4 | 1238 | static const struct nfnl_callback nfqnl_cb[NFQNL_MSG_MAX] = { |
84a797dd | 1239 | [NFQNL_MSG_PACKET] = { .call_rcu = nfqnl_recv_unsupp, |
37d2e7a2 | 1240 | .attr_count = NFQA_MAX, }, |
84a797dd | 1241 | [NFQNL_MSG_VERDICT] = { .call_rcu = nfqnl_recv_verdict, |
5bf75853 PM |
1242 | .attr_count = NFQA_MAX, |
1243 | .policy = nfqa_verdict_policy }, | |
7af4cc3f | 1244 | [NFQNL_MSG_CONFIG] = { .call = nfqnl_recv_config, |
5bf75853 PM |
1245 | .attr_count = NFQA_CFG_MAX, |
1246 | .policy = nfqa_cfg_policy }, | |
97d32cf9 FW |
1247 | [NFQNL_MSG_VERDICT_BATCH]={ .call_rcu = nfqnl_recv_verdict_batch, |
1248 | .attr_count = NFQA_MAX, | |
1249 | .policy = nfqa_verdict_batch_policy }, | |
7af4cc3f HW |
1250 | }; |
1251 | ||
7c8d4cb4 | 1252 | static const struct nfnetlink_subsystem nfqnl_subsys = { |
7af4cc3f HW |
1253 | .name = "nf_queue", |
1254 | .subsys_id = NFNL_SUBSYS_QUEUE, | |
1255 | .cb_count = NFQNL_MSG_MAX, | |
7af4cc3f HW |
1256 | .cb = nfqnl_cb, |
1257 | }; | |
1258 | ||
838ab636 HW |
1259 | #ifdef CONFIG_PROC_FS |
1260 | struct iter_state { | |
e8179610 | 1261 | struct seq_net_private p; |
838ab636 HW |
1262 | unsigned int bucket; |
1263 | }; | |
1264 | ||
1265 | static struct hlist_node *get_first(struct seq_file *seq) | |
1266 | { | |
1267 | struct iter_state *st = seq->private; | |
e8179610 G |
1268 | struct net *net; |
1269 | struct nfnl_queue_net *q; | |
838ab636 HW |
1270 | |
1271 | if (!st) | |
1272 | return NULL; | |
1273 | ||
e8179610 G |
1274 | net = seq_file_net(seq); |
1275 | q = nfnl_queue_pernet(net); | |
838ab636 | 1276 | for (st->bucket = 0; st->bucket < INSTANCE_BUCKETS; st->bucket++) { |
e8179610 G |
1277 | if (!hlist_empty(&q->instance_table[st->bucket])) |
1278 | return q->instance_table[st->bucket].first; | |
838ab636 HW |
1279 | } |
1280 | return NULL; | |
1281 | } | |
1282 | ||
1283 | static struct hlist_node *get_next(struct seq_file *seq, struct hlist_node *h) | |
1284 | { | |
1285 | struct iter_state *st = seq->private; | |
e8179610 | 1286 | struct net *net = seq_file_net(seq); |
838ab636 HW |
1287 | |
1288 | h = h->next; | |
1289 | while (!h) { | |
e8179610 G |
1290 | struct nfnl_queue_net *q; |
1291 | ||
838ab636 HW |
1292 | if (++st->bucket >= INSTANCE_BUCKETS) |
1293 | return NULL; | |
1294 | ||
e8179610 G |
1295 | q = nfnl_queue_pernet(net); |
1296 | h = q->instance_table[st->bucket].first; | |
838ab636 HW |
1297 | } |
1298 | return h; | |
1299 | } | |
1300 | ||
1301 | static struct hlist_node *get_idx(struct seq_file *seq, loff_t pos) | |
1302 | { | |
1303 | struct hlist_node *head; | |
1304 | head = get_first(seq); | |
1305 | ||
1306 | if (head) | |
1307 | while (pos && (head = get_next(seq, head))) | |
1308 | pos--; | |
1309 | return pos ? NULL : head; | |
1310 | } | |
1311 | ||
e8179610 G |
1312 | static void *seq_start(struct seq_file *s, loff_t *pos) |
1313 | __acquires(nfnl_queue_pernet(seq_file_net(s))->instances_lock) | |
838ab636 | 1314 | { |
e8179610 G |
1315 | spin_lock(&nfnl_queue_pernet(seq_file_net(s))->instances_lock); |
1316 | return get_idx(s, *pos); | |
838ab636 HW |
1317 | } |
1318 | ||
1319 | static void *seq_next(struct seq_file *s, void *v, loff_t *pos) | |
1320 | { | |
1321 | (*pos)++; | |
1322 | return get_next(s, v); | |
1323 | } | |
1324 | ||
1325 | static void seq_stop(struct seq_file *s, void *v) | |
e8179610 | 1326 | __releases(nfnl_queue_pernet(seq_file_net(s))->instances_lock) |
838ab636 | 1327 | { |
e8179610 | 1328 | spin_unlock(&nfnl_queue_pernet(seq_file_net(s))->instances_lock); |
838ab636 HW |
1329 | } |
1330 | ||
1331 | static int seq_show(struct seq_file *s, void *v) | |
1332 | { | |
1333 | const struct nfqnl_instance *inst = v; | |
1334 | ||
6b46f7b7 | 1335 | seq_printf(s, "%5u %6u %5u %1u %5u %5u %5u %8u %2d\n", |
e71456ae SRRH |
1336 | inst->queue_num, |
1337 | inst->peer_portid, inst->queue_total, | |
1338 | inst->copy_mode, inst->copy_range, | |
1339 | inst->queue_dropped, inst->queue_user_dropped, | |
1340 | inst->id_sequence, 1); | |
861fb107 | 1341 | return 0; |
838ab636 HW |
1342 | } |
1343 | ||
56b3d975 | 1344 | static const struct seq_operations nfqnl_seq_ops = { |
838ab636 HW |
1345 | .start = seq_start, |
1346 | .next = seq_next, | |
1347 | .stop = seq_stop, | |
1348 | .show = seq_show, | |
1349 | }; | |
1350 | ||
1351 | static int nfqnl_open(struct inode *inode, struct file *file) | |
1352 | { | |
e8179610 | 1353 | return seq_open_net(inode, file, &nfqnl_seq_ops, |
e2da5913 | 1354 | sizeof(struct iter_state)); |
838ab636 HW |
1355 | } |
1356 | ||
da7071d7 | 1357 | static const struct file_operations nfqnl_file_ops = { |
838ab636 HW |
1358 | .owner = THIS_MODULE, |
1359 | .open = nfqnl_open, | |
1360 | .read = seq_read, | |
1361 | .llseek = seq_lseek, | |
e8179610 | 1362 | .release = seq_release_net, |
838ab636 HW |
1363 | }; |
1364 | ||
1365 | #endif /* PROC_FS */ | |
1366 | ||
e8179610 | 1367 | static int __net_init nfnl_queue_net_init(struct net *net) |
7af4cc3f | 1368 | { |
e8179610 G |
1369 | unsigned int i; |
1370 | struct nfnl_queue_net *q = nfnl_queue_pernet(net); | |
601e68e1 | 1371 | |
838ab636 | 1372 | for (i = 0; i < INSTANCE_BUCKETS; i++) |
e8179610 G |
1373 | INIT_HLIST_HEAD(&q->instance_table[i]); |
1374 | ||
1375 | spin_lock_init(&q->instances_lock); | |
1376 | ||
1377 | #ifdef CONFIG_PROC_FS | |
1378 | if (!proc_create("nfnetlink_queue", 0440, | |
1379 | net->nf.proc_netfilter, &nfqnl_file_ops)) | |
1380 | return -ENOMEM; | |
1381 | #endif | |
1382 | return 0; | |
1383 | } | |
1384 | ||
1385 | static void __net_exit nfnl_queue_net_exit(struct net *net) | |
1386 | { | |
e778f56e | 1387 | #ifdef CONFIG_PROC_FS |
e8179610 | 1388 | remove_proc_entry("nfnetlink_queue", net->nf.proc_netfilter); |
e778f56e | 1389 | #endif |
e8179610 G |
1390 | } |
1391 | ||
1392 | static struct pernet_operations nfnl_queue_net_ops = { | |
1393 | .init = nfnl_queue_net_init, | |
1394 | .exit = nfnl_queue_net_exit, | |
1395 | .id = &nfnl_queue_net_id, | |
1396 | .size = sizeof(struct nfnl_queue_net), | |
1397 | }; | |
1398 | ||
1399 | static int __init nfnetlink_queue_init(void) | |
1400 | { | |
3bfe0498 FR |
1401 | int status; |
1402 | ||
1403 | status = register_pernet_subsys(&nfnl_queue_net_ops); | |
1404 | if (status < 0) { | |
1405 | pr_err("nf_queue: failed to register pernet ops\n"); | |
1406 | goto out; | |
1407 | } | |
838ab636 | 1408 | |
7af4cc3f HW |
1409 | netlink_register_notifier(&nfqnl_rtnl_notifier); |
1410 | status = nfnetlink_subsys_register(&nfqnl_subsys); | |
1411 | if (status < 0) { | |
e8179610 | 1412 | pr_err("nf_queue: failed to create netlink socket\n"); |
7af4cc3f HW |
1413 | goto cleanup_netlink_notifier; |
1414 | } | |
1415 | ||
1416 | register_netdevice_notifier(&nfqnl_dev_notifier); | |
0360ae41 | 1417 | nf_register_queue_handler(&nfqh); |
7af4cc3f HW |
1418 | return status; |
1419 | ||
7af4cc3f HW |
1420 | cleanup_netlink_notifier: |
1421 | netlink_unregister_notifier(&nfqnl_rtnl_notifier); | |
3bfe0498 | 1422 | out: |
7af4cc3f HW |
1423 | return status; |
1424 | } | |
1425 | ||
65b4b4e8 | 1426 | static void __exit nfnetlink_queue_fini(void) |
7af4cc3f | 1427 | { |
0360ae41 | 1428 | nf_unregister_queue_handler(); |
32292a7f | 1429 | unregister_netdevice_notifier(&nfqnl_dev_notifier); |
32292a7f PM |
1430 | nfnetlink_subsys_unregister(&nfqnl_subsys); |
1431 | netlink_unregister_notifier(&nfqnl_rtnl_notifier); | |
3bfe0498 | 1432 | unregister_pernet_subsys(&nfnl_queue_net_ops); |
67137f3c JDB |
1433 | |
1434 | rcu_barrier(); /* Wait for completion of call_rcu()'s */ | |
7af4cc3f HW |
1435 | } |
1436 | ||
1437 | MODULE_DESCRIPTION("netfilter packet queue handler"); | |
1438 | MODULE_AUTHOR("Harald Welte <laforge@netfilter.org>"); | |
1439 | MODULE_LICENSE("GPL"); | |
1440 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_QUEUE); | |
1441 | ||
65b4b4e8 AM |
1442 | module_init(nfnetlink_queue_init); |
1443 | module_exit(nfnetlink_queue_fini); |