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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 | |
3 | * userspace via nfetlink. | |
4 | * | |
5 | * (C) 2005 by Harald Welte <laforge@netfilter.org> | |
6 | * | |
7 | * Based on the old ipv4-only ip_queue.c: | |
8 | * (C) 2000-2002 James Morris <jmorris@intercode.com.au> | |
9 | * (C) 2003-2005 Netfilter Core Team <coreteam@netfilter.org> | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or modify | |
12 | * it under the terms of the GNU General Public License version 2 as | |
13 | * published by the Free Software Foundation. | |
14 | * | |
15 | */ | |
16 | #include <linux/module.h> | |
17 | #include <linux/skbuff.h> | |
18 | #include <linux/init.h> | |
19 | #include <linux/spinlock.h> | |
20 | #include <linux/notifier.h> | |
21 | #include <linux/netdevice.h> | |
22 | #include <linux/netfilter.h> | |
838ab636 | 23 | #include <linux/proc_fs.h> |
7af4cc3f HW |
24 | #include <linux/netfilter_ipv4.h> |
25 | #include <linux/netfilter_ipv6.h> | |
26 | #include <linux/netfilter/nfnetlink.h> | |
27 | #include <linux/netfilter/nfnetlink_queue.h> | |
28 | #include <linux/list.h> | |
29 | #include <net/sock.h> | |
c01cd429 | 30 | #include <net/netfilter/nf_queue.h> |
7af4cc3f HW |
31 | |
32 | #include <asm/atomic.h> | |
33 | ||
fbcd923c HW |
34 | #ifdef CONFIG_BRIDGE_NETFILTER |
35 | #include "../bridge/br_private.h" | |
36 | #endif | |
37 | ||
7af4cc3f HW |
38 | #define NFQNL_QMAX_DEFAULT 1024 |
39 | ||
40 | #if 0 | |
41 | #define QDEBUG(x, args ...) printk(KERN_DEBUG "%s(%d):%s(): " x, \ | |
42 | __FILE__, __LINE__, __FUNCTION__, \ | |
43 | ## args) | |
44 | #else | |
45 | #define QDEBUG(x, ...) | |
46 | #endif | |
47 | ||
7af4cc3f HW |
48 | struct nfqnl_instance { |
49 | struct hlist_node hlist; /* global list of queues */ | |
838ab636 | 50 | atomic_t use; |
7af4cc3f HW |
51 | |
52 | int peer_pid; | |
53 | unsigned int queue_maxlen; | |
54 | unsigned int copy_range; | |
55 | unsigned int queue_total; | |
56 | unsigned int queue_dropped; | |
57 | unsigned int queue_user_dropped; | |
58 | ||
e48b9b2f | 59 | unsigned int id_sequence; /* 'sequence' of pkt ids */ |
7af4cc3f HW |
60 | |
61 | u_int16_t queue_num; /* number of this queue */ | |
62 | u_int8_t copy_mode; | |
63 | ||
64 | spinlock_t lock; | |
65 | ||
66 | struct list_head queue_list; /* packets in queue */ | |
67 | }; | |
68 | ||
02f014d8 | 69 | typedef int (*nfqnl_cmpfn)(struct nf_queue_entry *, unsigned long); |
7af4cc3f HW |
70 | |
71 | static DEFINE_RWLOCK(instances_lock); | |
72 | ||
7af4cc3f HW |
73 | #define INSTANCE_BUCKETS 16 |
74 | static struct hlist_head instance_table[INSTANCE_BUCKETS]; | |
75 | ||
76 | static inline u_int8_t instance_hashfn(u_int16_t queue_num) | |
77 | { | |
78 | return ((queue_num >> 8) | queue_num) % INSTANCE_BUCKETS; | |
79 | } | |
80 | ||
81 | static struct nfqnl_instance * | |
82 | __instance_lookup(u_int16_t queue_num) | |
83 | { | |
84 | struct hlist_head *head; | |
85 | struct hlist_node *pos; | |
86 | struct nfqnl_instance *inst; | |
87 | ||
88 | head = &instance_table[instance_hashfn(queue_num)]; | |
89 | hlist_for_each_entry(inst, pos, head, hlist) { | |
90 | if (inst->queue_num == queue_num) | |
91 | return inst; | |
92 | } | |
93 | return NULL; | |
94 | } | |
95 | ||
96 | static struct nfqnl_instance * | |
838ab636 | 97 | instance_lookup_get(u_int16_t queue_num) |
7af4cc3f HW |
98 | { |
99 | struct nfqnl_instance *inst; | |
100 | ||
101 | read_lock_bh(&instances_lock); | |
102 | inst = __instance_lookup(queue_num); | |
838ab636 HW |
103 | if (inst) |
104 | atomic_inc(&inst->use); | |
7af4cc3f HW |
105 | read_unlock_bh(&instances_lock); |
106 | ||
107 | return inst; | |
108 | } | |
109 | ||
838ab636 HW |
110 | static void |
111 | instance_put(struct nfqnl_instance *inst) | |
112 | { | |
113 | if (inst && atomic_dec_and_test(&inst->use)) { | |
114 | QDEBUG("kfree(inst=%p)\n", inst); | |
115 | kfree(inst); | |
116 | } | |
117 | } | |
118 | ||
7af4cc3f HW |
119 | static struct nfqnl_instance * |
120 | instance_create(u_int16_t queue_num, int pid) | |
121 | { | |
122 | struct nfqnl_instance *inst; | |
123 | ||
124 | QDEBUG("entering for queue_num=%u, pid=%d\n", queue_num, pid); | |
125 | ||
601e68e1 | 126 | write_lock_bh(&instances_lock); |
7af4cc3f HW |
127 | if (__instance_lookup(queue_num)) { |
128 | inst = NULL; | |
129 | QDEBUG("aborting, instance already exists\n"); | |
130 | goto out_unlock; | |
131 | } | |
132 | ||
10dfdc69 | 133 | inst = kzalloc(sizeof(*inst), GFP_ATOMIC); |
7af4cc3f HW |
134 | if (!inst) |
135 | goto out_unlock; | |
136 | ||
7af4cc3f HW |
137 | inst->queue_num = queue_num; |
138 | inst->peer_pid = pid; | |
139 | inst->queue_maxlen = NFQNL_QMAX_DEFAULT; | |
140 | inst->copy_range = 0xfffff; | |
141 | inst->copy_mode = NFQNL_COPY_NONE; | |
838ab636 HW |
142 | /* needs to be two, since we _put() after creation */ |
143 | atomic_set(&inst->use, 2); | |
181a46a5 | 144 | spin_lock_init(&inst->lock); |
7af4cc3f HW |
145 | INIT_LIST_HEAD(&inst->queue_list); |
146 | ||
147 | if (!try_module_get(THIS_MODULE)) | |
148 | goto out_free; | |
149 | ||
601e68e1 | 150 | hlist_add_head(&inst->hlist, |
7af4cc3f HW |
151 | &instance_table[instance_hashfn(queue_num)]); |
152 | ||
153 | write_unlock_bh(&instances_lock); | |
154 | ||
155 | QDEBUG("successfully created new instance\n"); | |
156 | ||
157 | return inst; | |
158 | ||
159 | out_free: | |
160 | kfree(inst); | |
161 | out_unlock: | |
162 | write_unlock_bh(&instances_lock); | |
163 | return NULL; | |
164 | } | |
165 | ||
b43d8d85 PM |
166 | static void nfqnl_flush(struct nfqnl_instance *queue, nfqnl_cmpfn cmpfn, |
167 | unsigned long data); | |
7af4cc3f HW |
168 | |
169 | static void | |
170 | _instance_destroy2(struct nfqnl_instance *inst, int lock) | |
171 | { | |
172 | /* first pull it out of the global list */ | |
173 | if (lock) | |
174 | write_lock_bh(&instances_lock); | |
175 | ||
176 | QDEBUG("removing instance %p (queuenum=%u) from hash\n", | |
177 | inst, inst->queue_num); | |
178 | hlist_del(&inst->hlist); | |
179 | ||
180 | if (lock) | |
181 | write_unlock_bh(&instances_lock); | |
182 | ||
183 | /* then flush all pending skbs from the queue */ | |
b43d8d85 | 184 | nfqnl_flush(inst, NULL, 0); |
7af4cc3f | 185 | |
838ab636 HW |
186 | /* and finally put the refcount */ |
187 | instance_put(inst); | |
7af4cc3f HW |
188 | |
189 | module_put(THIS_MODULE); | |
190 | } | |
191 | ||
192 | static inline void | |
193 | __instance_destroy(struct nfqnl_instance *inst) | |
194 | { | |
195 | _instance_destroy2(inst, 0); | |
196 | } | |
197 | ||
198 | static inline void | |
199 | instance_destroy(struct nfqnl_instance *inst) | |
200 | { | |
201 | _instance_destroy2(inst, 1); | |
202 | } | |
203 | ||
7af4cc3f | 204 | static inline void |
02f014d8 | 205 | __enqueue_entry(struct nfqnl_instance *queue, struct nf_queue_entry *entry) |
7af4cc3f | 206 | { |
0ac41e81 | 207 | list_add_tail(&entry->list, &queue->queue_list); |
7af4cc3f HW |
208 | queue->queue_total++; |
209 | } | |
210 | ||
7af4cc3f HW |
211 | static inline int |
212 | __nfqnl_set_mode(struct nfqnl_instance *queue, | |
213 | unsigned char mode, unsigned int range) | |
214 | { | |
215 | int status = 0; | |
601e68e1 | 216 | |
7af4cc3f HW |
217 | switch (mode) { |
218 | case NFQNL_COPY_NONE: | |
219 | case NFQNL_COPY_META: | |
220 | queue->copy_mode = mode; | |
221 | queue->copy_range = 0; | |
222 | break; | |
601e68e1 | 223 | |
7af4cc3f HW |
224 | case NFQNL_COPY_PACKET: |
225 | queue->copy_mode = mode; | |
df6fb868 | 226 | /* we're using struct nlattr which has 16bit nla_len */ |
7af4cc3f HW |
227 | if (range > 0xffff) |
228 | queue->copy_range = 0xffff; | |
229 | else | |
230 | queue->copy_range = range; | |
231 | break; | |
601e68e1 | 232 | |
7af4cc3f HW |
233 | default: |
234 | status = -EINVAL; | |
235 | ||
236 | } | |
237 | return status; | |
238 | } | |
239 | ||
02f014d8 | 240 | static struct nf_queue_entry * |
b43d8d85 | 241 | find_dequeue_entry(struct nfqnl_instance *queue, unsigned int id) |
7af4cc3f | 242 | { |
02f014d8 | 243 | struct nf_queue_entry *entry = NULL, *i; |
601e68e1 | 244 | |
7af4cc3f | 245 | spin_lock_bh(&queue->lock); |
b43d8d85 PM |
246 | |
247 | list_for_each_entry(i, &queue->queue_list, list) { | |
248 | if (i->id == id) { | |
249 | entry = i; | |
250 | break; | |
251 | } | |
252 | } | |
253 | ||
254 | if (entry) { | |
255 | list_del(&entry->list); | |
256 | queue->queue_total--; | |
257 | } | |
258 | ||
7af4cc3f HW |
259 | spin_unlock_bh(&queue->lock); |
260 | ||
261 | return entry; | |
262 | } | |
263 | ||
264 | static void | |
b43d8d85 | 265 | nfqnl_flush(struct nfqnl_instance *queue, nfqnl_cmpfn cmpfn, unsigned long data) |
7af4cc3f | 266 | { |
02f014d8 | 267 | struct nf_queue_entry *entry, *next; |
b43d8d85 | 268 | |
7af4cc3f | 269 | spin_lock_bh(&queue->lock); |
b43d8d85 PM |
270 | list_for_each_entry_safe(entry, next, &queue->queue_list, list) { |
271 | if (!cmpfn || cmpfn(entry, data)) { | |
272 | list_del(&entry->list); | |
273 | queue->queue_total--; | |
4b3d15ef | 274 | nf_reinject(entry, NF_DROP); |
b43d8d85 PM |
275 | } |
276 | } | |
7af4cc3f HW |
277 | spin_unlock_bh(&queue->lock); |
278 | } | |
279 | ||
280 | static struct sk_buff * | |
281 | nfqnl_build_packet_message(struct nfqnl_instance *queue, | |
02f014d8 | 282 | struct nf_queue_entry *entry, int *errp) |
7af4cc3f | 283 | { |
27a884dc | 284 | sk_buff_data_t old_tail; |
7af4cc3f HW |
285 | size_t size; |
286 | size_t data_len = 0; | |
287 | struct sk_buff *skb; | |
288 | struct nfqnl_msg_packet_hdr pmsg; | |
289 | struct nlmsghdr *nlh; | |
290 | struct nfgenmsg *nfmsg; | |
3e4ead4f JJ |
291 | struct sk_buff *entskb = entry->skb; |
292 | struct net_device *indev; | |
293 | struct net_device *outdev; | |
98a4a861 | 294 | __be32 tmp_uint; |
7af4cc3f HW |
295 | |
296 | QDEBUG("entered\n"); | |
297 | ||
df6fb868 PM |
298 | size = NLMSG_ALIGN(sizeof(struct nfgenmsg)) |
299 | + nla_total_size(sizeof(struct nfqnl_msg_packet_hdr)) | |
300 | + nla_total_size(sizeof(u_int32_t)) /* ifindex */ | |
301 | + nla_total_size(sizeof(u_int32_t)) /* ifindex */ | |
fbcd923c | 302 | #ifdef CONFIG_BRIDGE_NETFILTER |
df6fb868 PM |
303 | + nla_total_size(sizeof(u_int32_t)) /* ifindex */ |
304 | + nla_total_size(sizeof(u_int32_t)) /* ifindex */ | |
fbcd923c | 305 | #endif |
df6fb868 PM |
306 | + nla_total_size(sizeof(u_int32_t)) /* mark */ |
307 | + nla_total_size(sizeof(struct nfqnl_msg_packet_hw)) | |
308 | + nla_total_size(sizeof(struct nfqnl_msg_packet_timestamp)); | |
7af4cc3f | 309 | |
02f014d8 | 310 | outdev = entry->outdev; |
3e4ead4f | 311 | |
7af4cc3f | 312 | spin_lock_bh(&queue->lock); |
601e68e1 | 313 | |
7af4cc3f HW |
314 | switch (queue->copy_mode) { |
315 | case NFQNL_COPY_META: | |
316 | case NFQNL_COPY_NONE: | |
317 | data_len = 0; | |
318 | break; | |
601e68e1 | 319 | |
7af4cc3f | 320 | case NFQNL_COPY_PACKET: |
84fa7933 PM |
321 | if ((entskb->ip_summed == CHECKSUM_PARTIAL || |
322 | entskb->ip_summed == CHECKSUM_COMPLETE) && | |
323 | (*errp = skb_checksum_help(entskb))) { | |
e7dfb09a PM |
324 | spin_unlock_bh(&queue->lock); |
325 | return NULL; | |
326 | } | |
601e68e1 | 327 | if (queue->copy_range == 0 |
3e4ead4f JJ |
328 | || queue->copy_range > entskb->len) |
329 | data_len = entskb->len; | |
7af4cc3f HW |
330 | else |
331 | data_len = queue->copy_range; | |
601e68e1 | 332 | |
df6fb868 | 333 | size += nla_total_size(data_len); |
7af4cc3f | 334 | break; |
601e68e1 | 335 | |
7af4cc3f HW |
336 | default: |
337 | *errp = -EINVAL; | |
338 | spin_unlock_bh(&queue->lock); | |
339 | return NULL; | |
340 | } | |
341 | ||
e48b9b2f PM |
342 | entry->id = queue->id_sequence++; |
343 | ||
7af4cc3f HW |
344 | spin_unlock_bh(&queue->lock); |
345 | ||
346 | skb = alloc_skb(size, GFP_ATOMIC); | |
347 | if (!skb) | |
348 | goto nlmsg_failure; | |
601e68e1 | 349 | |
27a884dc | 350 | old_tail = skb->tail; |
601e68e1 | 351 | nlh = NLMSG_PUT(skb, 0, 0, |
7af4cc3f HW |
352 | NFNL_SUBSYS_QUEUE << 8 | NFQNL_MSG_PACKET, |
353 | sizeof(struct nfgenmsg)); | |
354 | nfmsg = NLMSG_DATA(nlh); | |
02f014d8 | 355 | nfmsg->nfgen_family = entry->pf; |
7af4cc3f HW |
356 | nfmsg->version = NFNETLINK_V0; |
357 | nfmsg->res_id = htons(queue->queue_num); | |
358 | ||
359 | pmsg.packet_id = htonl(entry->id); | |
febf0a43 | 360 | pmsg.hw_protocol = entskb->protocol; |
02f014d8 | 361 | pmsg.hook = entry->hook; |
7af4cc3f | 362 | |
df6fb868 | 363 | NLA_PUT(skb, NFQA_PACKET_HDR, sizeof(pmsg), &pmsg); |
7af4cc3f | 364 | |
02f014d8 | 365 | indev = entry->indev; |
3e4ead4f JJ |
366 | if (indev) { |
367 | tmp_uint = htonl(indev->ifindex); | |
fbcd923c | 368 | #ifndef CONFIG_BRIDGE_NETFILTER |
df6fb868 | 369 | NLA_PUT(skb, NFQA_IFINDEX_INDEV, sizeof(tmp_uint), &tmp_uint); |
fbcd923c | 370 | #else |
02f014d8 | 371 | if (entry->pf == PF_BRIDGE) { |
fbcd923c | 372 | /* Case 1: indev is physical input device, we need to |
601e68e1 | 373 | * look for bridge group (when called from |
fbcd923c | 374 | * netfilter_bridge) */ |
df6fb868 | 375 | NLA_PUT(skb, NFQA_IFINDEX_PHYSINDEV, sizeof(tmp_uint), |
fbcd923c HW |
376 | &tmp_uint); |
377 | /* this is the bridge group "brX" */ | |
3e4ead4f | 378 | tmp_uint = htonl(indev->br_port->br->dev->ifindex); |
df6fb868 | 379 | NLA_PUT(skb, NFQA_IFINDEX_INDEV, sizeof(tmp_uint), |
fbcd923c HW |
380 | &tmp_uint); |
381 | } else { | |
382 | /* Case 2: indev is bridge group, we need to look for | |
383 | * physical device (when called from ipv4) */ | |
df6fb868 | 384 | NLA_PUT(skb, NFQA_IFINDEX_INDEV, sizeof(tmp_uint), |
fbcd923c | 385 | &tmp_uint); |
3e4ead4f JJ |
386 | if (entskb->nf_bridge |
387 | && entskb->nf_bridge->physindev) { | |
388 | tmp_uint = htonl(entskb->nf_bridge->physindev->ifindex); | |
df6fb868 | 389 | NLA_PUT(skb, NFQA_IFINDEX_PHYSINDEV, |
fbcd923c HW |
390 | sizeof(tmp_uint), &tmp_uint); |
391 | } | |
392 | } | |
393 | #endif | |
7af4cc3f HW |
394 | } |
395 | ||
3e4ead4f JJ |
396 | if (outdev) { |
397 | tmp_uint = htonl(outdev->ifindex); | |
fbcd923c | 398 | #ifndef CONFIG_BRIDGE_NETFILTER |
df6fb868 | 399 | NLA_PUT(skb, NFQA_IFINDEX_OUTDEV, sizeof(tmp_uint), &tmp_uint); |
fbcd923c | 400 | #else |
02f014d8 | 401 | if (entry->pf == PF_BRIDGE) { |
fbcd923c | 402 | /* Case 1: outdev is physical output device, we need to |
601e68e1 | 403 | * look for bridge group (when called from |
fbcd923c | 404 | * netfilter_bridge) */ |
df6fb868 | 405 | NLA_PUT(skb, NFQA_IFINDEX_PHYSOUTDEV, sizeof(tmp_uint), |
fbcd923c HW |
406 | &tmp_uint); |
407 | /* this is the bridge group "brX" */ | |
3e4ead4f | 408 | tmp_uint = htonl(outdev->br_port->br->dev->ifindex); |
df6fb868 | 409 | NLA_PUT(skb, NFQA_IFINDEX_OUTDEV, sizeof(tmp_uint), |
fbcd923c HW |
410 | &tmp_uint); |
411 | } else { | |
412 | /* Case 2: outdev is bridge group, we need to look for | |
413 | * physical output device (when called from ipv4) */ | |
df6fb868 | 414 | NLA_PUT(skb, NFQA_IFINDEX_OUTDEV, sizeof(tmp_uint), |
fbcd923c | 415 | &tmp_uint); |
3e4ead4f JJ |
416 | if (entskb->nf_bridge |
417 | && entskb->nf_bridge->physoutdev) { | |
418 | tmp_uint = htonl(entskb->nf_bridge->physoutdev->ifindex); | |
df6fb868 | 419 | NLA_PUT(skb, NFQA_IFINDEX_PHYSOUTDEV, |
fbcd923c HW |
420 | sizeof(tmp_uint), &tmp_uint); |
421 | } | |
422 | } | |
423 | #endif | |
7af4cc3f HW |
424 | } |
425 | ||
82e91ffe TG |
426 | if (entskb->mark) { |
427 | tmp_uint = htonl(entskb->mark); | |
df6fb868 | 428 | NLA_PUT(skb, NFQA_MARK, sizeof(u_int32_t), &tmp_uint); |
7af4cc3f HW |
429 | } |
430 | ||
b95cce35 | 431 | if (indev && entskb->dev) { |
7af4cc3f | 432 | struct nfqnl_msg_packet_hw phw; |
b95cce35 SH |
433 | int len = dev_parse_header(entskb, phw.hw_addr); |
434 | if (len) { | |
435 | phw.hw_addrlen = htons(len); | |
df6fb868 | 436 | NLA_PUT(skb, NFQA_HWADDR, sizeof(phw), &phw); |
b95cce35 | 437 | } |
7af4cc3f HW |
438 | } |
439 | ||
b7aa0bf7 | 440 | if (entskb->tstamp.tv64) { |
7af4cc3f | 441 | struct nfqnl_msg_packet_timestamp ts; |
b7aa0bf7 ED |
442 | struct timeval tv = ktime_to_timeval(entskb->tstamp); |
443 | ts.sec = cpu_to_be64(tv.tv_sec); | |
444 | ts.usec = cpu_to_be64(tv.tv_usec); | |
7af4cc3f | 445 | |
df6fb868 | 446 | NLA_PUT(skb, NFQA_TIMESTAMP, sizeof(ts), &ts); |
7af4cc3f HW |
447 | } |
448 | ||
449 | if (data_len) { | |
df6fb868 PM |
450 | struct nlattr *nla; |
451 | int size = nla_attr_size(data_len); | |
7af4cc3f | 452 | |
df6fb868 | 453 | if (skb_tailroom(skb) < nla_total_size(data_len)) { |
7af4cc3f HW |
454 | printk(KERN_WARNING "nf_queue: no tailroom!\n"); |
455 | goto nlmsg_failure; | |
456 | } | |
457 | ||
df6fb868 PM |
458 | nla = (struct nlattr *)skb_put(skb, nla_total_size(data_len)); |
459 | nla->nla_type = NFQA_PAYLOAD; | |
460 | nla->nla_len = size; | |
7af4cc3f | 461 | |
df6fb868 | 462 | if (skb_copy_bits(entskb, 0, nla_data(nla), data_len)) |
7af4cc3f HW |
463 | BUG(); |
464 | } | |
601e68e1 | 465 | |
7af4cc3f HW |
466 | nlh->nlmsg_len = skb->tail - old_tail; |
467 | return skb; | |
468 | ||
469 | nlmsg_failure: | |
df6fb868 | 470 | nla_put_failure: |
7af4cc3f HW |
471 | if (skb) |
472 | kfree_skb(skb); | |
473 | *errp = -EINVAL; | |
474 | if (net_ratelimit()) | |
475 | printk(KERN_ERR "nf_queue: error creating packet message\n"); | |
476 | return NULL; | |
477 | } | |
478 | ||
479 | static int | |
02f014d8 | 480 | nfqnl_enqueue_packet(struct nf_queue_entry *entry, unsigned int queuenum) |
7af4cc3f HW |
481 | { |
482 | int status = -EINVAL; | |
483 | struct sk_buff *nskb; | |
484 | struct nfqnl_instance *queue; | |
7af4cc3f HW |
485 | |
486 | QDEBUG("entered\n"); | |
487 | ||
838ab636 | 488 | queue = instance_lookup_get(queuenum); |
7af4cc3f HW |
489 | if (!queue) { |
490 | QDEBUG("no queue instance matching\n"); | |
491 | return -EINVAL; | |
492 | } | |
493 | ||
494 | if (queue->copy_mode == NFQNL_COPY_NONE) { | |
495 | QDEBUG("mode COPY_NONE, aborting\n"); | |
838ab636 HW |
496 | status = -EAGAIN; |
497 | goto err_out_put; | |
7af4cc3f HW |
498 | } |
499 | ||
7af4cc3f HW |
500 | nskb = nfqnl_build_packet_message(queue, entry, &status); |
501 | if (nskb == NULL) | |
02f014d8 | 502 | goto err_out_put; |
601e68e1 | 503 | |
7af4cc3f | 504 | spin_lock_bh(&queue->lock); |
601e68e1 | 505 | |
7af4cc3f | 506 | if (!queue->peer_pid) |
601e68e1 | 507 | goto err_out_free_nskb; |
7af4cc3f HW |
508 | |
509 | if (queue->queue_total >= queue->queue_maxlen) { | |
601e68e1 | 510 | queue->queue_dropped++; |
7af4cc3f HW |
511 | status = -ENOSPC; |
512 | if (net_ratelimit()) | |
601e68e1 YH |
513 | printk(KERN_WARNING "nf_queue: full at %d entries, " |
514 | "dropping packets(s). Dropped: %d\n", | |
7af4cc3f HW |
515 | queue->queue_total, queue->queue_dropped); |
516 | goto err_out_free_nskb; | |
517 | } | |
518 | ||
519 | /* nfnetlink_unicast will either free the nskb or add it to a socket */ | |
520 | status = nfnetlink_unicast(nskb, queue->peer_pid, MSG_DONTWAIT); | |
521 | if (status < 0) { | |
601e68e1 | 522 | queue->queue_user_dropped++; |
7af4cc3f HW |
523 | goto err_out_unlock; |
524 | } | |
525 | ||
526 | __enqueue_entry(queue, entry); | |
527 | ||
528 | spin_unlock_bh(&queue->lock); | |
838ab636 | 529 | instance_put(queue); |
7af4cc3f HW |
530 | return status; |
531 | ||
532 | err_out_free_nskb: | |
601e68e1 YH |
533 | kfree_skb(nskb); |
534 | ||
7af4cc3f HW |
535 | err_out_unlock: |
536 | spin_unlock_bh(&queue->lock); | |
537 | ||
838ab636 HW |
538 | err_out_put: |
539 | instance_put(queue); | |
7af4cc3f HW |
540 | return status; |
541 | } | |
542 | ||
543 | static int | |
02f014d8 | 544 | nfqnl_mangle(void *data, int data_len, struct nf_queue_entry *e) |
7af4cc3f HW |
545 | { |
546 | int diff; | |
2ca7b0ac | 547 | int err; |
7af4cc3f HW |
548 | |
549 | diff = data_len - e->skb->len; | |
d8a585d7 PM |
550 | if (diff < 0) { |
551 | if (pskb_trim(e->skb, data_len)) | |
552 | return -ENOMEM; | |
553 | } else if (diff > 0) { | |
7af4cc3f HW |
554 | if (data_len > 0xFFFF) |
555 | return -EINVAL; | |
556 | if (diff > skb_tailroom(e->skb)) { | |
2ca7b0ac HX |
557 | err = pskb_expand_head(e->skb, 0, |
558 | diff - skb_tailroom(e->skb), | |
559 | GFP_ATOMIC); | |
560 | if (err) { | |
1158ba27 | 561 | printk(KERN_WARNING "nf_queue: OOM " |
7af4cc3f | 562 | "in mangle, dropping packet\n"); |
2ca7b0ac | 563 | return err; |
7af4cc3f | 564 | } |
7af4cc3f HW |
565 | } |
566 | skb_put(e->skb, diff); | |
567 | } | |
37d41879 | 568 | if (!skb_make_writable(e->skb, data_len)) |
7af4cc3f | 569 | return -ENOMEM; |
27d7ff46 | 570 | skb_copy_to_linear_data(e->skb, data, data_len); |
e7dfb09a | 571 | e->skb->ip_summed = CHECKSUM_NONE; |
7af4cc3f HW |
572 | return 0; |
573 | } | |
574 | ||
7af4cc3f HW |
575 | static int |
576 | nfqnl_set_mode(struct nfqnl_instance *queue, | |
577 | unsigned char mode, unsigned int range) | |
578 | { | |
579 | int status; | |
580 | ||
581 | spin_lock_bh(&queue->lock); | |
582 | status = __nfqnl_set_mode(queue, mode, range); | |
583 | spin_unlock_bh(&queue->lock); | |
584 | ||
585 | return status; | |
586 | } | |
587 | ||
588 | static int | |
02f014d8 | 589 | dev_cmp(struct nf_queue_entry *entry, unsigned long ifindex) |
7af4cc3f | 590 | { |
02f014d8 PM |
591 | if (entry->indev) |
592 | if (entry->indev->ifindex == ifindex) | |
7af4cc3f | 593 | return 1; |
02f014d8 PM |
594 | if (entry->outdev) |
595 | if (entry->outdev->ifindex == ifindex) | |
7af4cc3f | 596 | return 1; |
ef47c6a7 PM |
597 | #ifdef CONFIG_BRIDGE_NETFILTER |
598 | if (entry->skb->nf_bridge) { | |
599 | if (entry->skb->nf_bridge->physindev && | |
600 | entry->skb->nf_bridge->physindev->ifindex == ifindex) | |
601 | return 1; | |
602 | if (entry->skb->nf_bridge->physoutdev && | |
603 | entry->skb->nf_bridge->physoutdev->ifindex == ifindex) | |
604 | return 1; | |
605 | } | |
606 | #endif | |
7af4cc3f HW |
607 | return 0; |
608 | } | |
609 | ||
610 | /* drop all packets with either indev or outdev == ifindex from all queue | |
611 | * instances */ | |
612 | static void | |
613 | nfqnl_dev_drop(int ifindex) | |
614 | { | |
615 | int i; | |
601e68e1 | 616 | |
7af4cc3f HW |
617 | QDEBUG("entering for ifindex %u\n", ifindex); |
618 | ||
619 | /* this only looks like we have to hold the readlock for a way too long | |
620 | * time, issue_verdict(), nf_reinject(), ... - but we always only | |
621 | * issue NF_DROP, which is processed directly in nf_reinject() */ | |
622 | read_lock_bh(&instances_lock); | |
623 | ||
624 | for (i = 0; i < INSTANCE_BUCKETS; i++) { | |
625 | struct hlist_node *tmp; | |
626 | struct nfqnl_instance *inst; | |
627 | struct hlist_head *head = &instance_table[i]; | |
628 | ||
b43d8d85 PM |
629 | hlist_for_each_entry(inst, tmp, head, hlist) |
630 | nfqnl_flush(inst, dev_cmp, ifindex); | |
7af4cc3f HW |
631 | } |
632 | ||
633 | read_unlock_bh(&instances_lock); | |
634 | } | |
635 | ||
636 | #define RCV_SKB_FAIL(err) do { netlink_ack(skb, nlh, (err)); return; } while (0) | |
637 | ||
638 | static int | |
639 | nfqnl_rcv_dev_event(struct notifier_block *this, | |
640 | unsigned long event, void *ptr) | |
641 | { | |
642 | struct net_device *dev = ptr; | |
643 | ||
e9dc8653 EB |
644 | if (dev->nd_net != &init_net) |
645 | return NOTIFY_DONE; | |
646 | ||
7af4cc3f HW |
647 | /* Drop any packets associated with the downed device */ |
648 | if (event == NETDEV_DOWN) | |
649 | nfqnl_dev_drop(dev->ifindex); | |
650 | return NOTIFY_DONE; | |
651 | } | |
652 | ||
653 | static struct notifier_block nfqnl_dev_notifier = { | |
654 | .notifier_call = nfqnl_rcv_dev_event, | |
655 | }; | |
656 | ||
657 | static int | |
658 | nfqnl_rcv_nl_event(struct notifier_block *this, | |
659 | unsigned long event, void *ptr) | |
660 | { | |
661 | struct netlink_notify *n = ptr; | |
662 | ||
663 | if (event == NETLINK_URELEASE && | |
664 | n->protocol == NETLINK_NETFILTER && n->pid) { | |
665 | int i; | |
666 | ||
667 | /* destroy all instances for this pid */ | |
668 | write_lock_bh(&instances_lock); | |
669 | for (i = 0; i < INSTANCE_BUCKETS; i++) { | |
670 | struct hlist_node *tmp, *t2; | |
671 | struct nfqnl_instance *inst; | |
672 | struct hlist_head *head = &instance_table[i]; | |
673 | ||
674 | hlist_for_each_entry_safe(inst, tmp, t2, head, hlist) { | |
b4b51029 EB |
675 | if ((n->net == &init_net) && |
676 | (n->pid == inst->peer_pid)) | |
7af4cc3f HW |
677 | __instance_destroy(inst); |
678 | } | |
679 | } | |
680 | write_unlock_bh(&instances_lock); | |
681 | } | |
682 | return NOTIFY_DONE; | |
683 | } | |
684 | ||
685 | static struct notifier_block nfqnl_rtnl_notifier = { | |
686 | .notifier_call = nfqnl_rcv_nl_event, | |
687 | }; | |
688 | ||
5bf75853 PM |
689 | static const struct nla_policy nfqa_verdict_policy[NFQA_MAX+1] = { |
690 | [NFQA_VERDICT_HDR] = { .len = sizeof(struct nfqnl_msg_verdict_hdr) }, | |
691 | [NFQA_MARK] = { .type = NLA_U32 }, | |
692 | [NFQA_PAYLOAD] = { .type = NLA_UNSPEC }, | |
838ab636 HW |
693 | }; |
694 | ||
7af4cc3f HW |
695 | static int |
696 | nfqnl_recv_verdict(struct sock *ctnl, struct sk_buff *skb, | |
df6fb868 | 697 | struct nlmsghdr *nlh, struct nlattr *nfqa[]) |
7af4cc3f HW |
698 | { |
699 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); | |
700 | u_int16_t queue_num = ntohs(nfmsg->res_id); | |
701 | ||
702 | struct nfqnl_msg_verdict_hdr *vhdr; | |
703 | struct nfqnl_instance *queue; | |
704 | unsigned int verdict; | |
02f014d8 | 705 | struct nf_queue_entry *entry; |
838ab636 | 706 | int err; |
7af4cc3f | 707 | |
838ab636 | 708 | queue = instance_lookup_get(queue_num); |
7af4cc3f HW |
709 | if (!queue) |
710 | return -ENODEV; | |
711 | ||
838ab636 HW |
712 | if (queue->peer_pid != NETLINK_CB(skb).pid) { |
713 | err = -EPERM; | |
714 | goto err_out_put; | |
715 | } | |
7af4cc3f | 716 | |
df6fb868 | 717 | if (!nfqa[NFQA_VERDICT_HDR]) { |
838ab636 HW |
718 | err = -EINVAL; |
719 | goto err_out_put; | |
720 | } | |
7af4cc3f | 721 | |
df6fb868 | 722 | vhdr = nla_data(nfqa[NFQA_VERDICT_HDR]); |
7af4cc3f HW |
723 | verdict = ntohl(vhdr->verdict); |
724 | ||
838ab636 HW |
725 | if ((verdict & NF_VERDICT_MASK) > NF_MAX_VERDICT) { |
726 | err = -EINVAL; | |
727 | goto err_out_put; | |
728 | } | |
7af4cc3f | 729 | |
b43d8d85 | 730 | entry = find_dequeue_entry(queue, ntohl(vhdr->id)); |
838ab636 HW |
731 | if (entry == NULL) { |
732 | err = -ENOENT; | |
733 | goto err_out_put; | |
734 | } | |
7af4cc3f | 735 | |
df6fb868 PM |
736 | if (nfqa[NFQA_PAYLOAD]) { |
737 | if (nfqnl_mangle(nla_data(nfqa[NFQA_PAYLOAD]), | |
738 | nla_len(nfqa[NFQA_PAYLOAD]), entry) < 0) | |
7af4cc3f HW |
739 | verdict = NF_DROP; |
740 | } | |
741 | ||
df6fb868 | 742 | if (nfqa[NFQA_MARK]) |
82e91ffe | 743 | entry->skb->mark = ntohl(*(__be32 *) |
df6fb868 | 744 | nla_data(nfqa[NFQA_MARK])); |
601e68e1 | 745 | |
4b3d15ef | 746 | nf_reinject(entry, verdict); |
838ab636 | 747 | instance_put(queue); |
7af4cc3f | 748 | return 0; |
838ab636 HW |
749 | |
750 | err_out_put: | |
751 | instance_put(queue); | |
752 | return err; | |
7af4cc3f HW |
753 | } |
754 | ||
755 | static int | |
756 | nfqnl_recv_unsupp(struct sock *ctnl, struct sk_buff *skb, | |
df6fb868 | 757 | struct nlmsghdr *nlh, struct nlattr *nfqa[]) |
7af4cc3f HW |
758 | { |
759 | return -ENOTSUPP; | |
760 | } | |
761 | ||
5bf75853 PM |
762 | static const struct nla_policy nfqa_cfg_policy[NFQA_CFG_MAX+1] = { |
763 | [NFQA_CFG_CMD] = { .len = sizeof(struct nfqnl_msg_config_cmd) }, | |
764 | [NFQA_CFG_PARAMS] = { .len = sizeof(struct nfqnl_msg_config_params) }, | |
838ab636 HW |
765 | }; |
766 | ||
e3ac5298 | 767 | static const struct nf_queue_handler nfqh = { |
bbd86b9f HW |
768 | .name = "nf_queue", |
769 | .outfn = &nfqnl_enqueue_packet, | |
770 | }; | |
771 | ||
7af4cc3f HW |
772 | static int |
773 | nfqnl_recv_config(struct sock *ctnl, struct sk_buff *skb, | |
df6fb868 | 774 | struct nlmsghdr *nlh, struct nlattr *nfqa[]) |
7af4cc3f HW |
775 | { |
776 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); | |
777 | u_int16_t queue_num = ntohs(nfmsg->res_id); | |
778 | struct nfqnl_instance *queue; | |
838ab636 | 779 | int ret = 0; |
7af4cc3f HW |
780 | |
781 | QDEBUG("entering for msg %u\n", NFNL_MSG_TYPE(nlh->nlmsg_type)); | |
782 | ||
838ab636 | 783 | queue = instance_lookup_get(queue_num); |
a3c8e7fd PM |
784 | if (queue && queue->peer_pid != NETLINK_CB(skb).pid) { |
785 | ret = -EPERM; | |
786 | goto out_put; | |
787 | } | |
788 | ||
df6fb868 | 789 | if (nfqa[NFQA_CFG_CMD]) { |
7af4cc3f | 790 | struct nfqnl_msg_config_cmd *cmd; |
a3c8e7fd | 791 | |
df6fb868 | 792 | cmd = nla_data(nfqa[NFQA_CFG_CMD]); |
7af4cc3f HW |
793 | QDEBUG("found CFG_CMD\n"); |
794 | ||
795 | switch (cmd->command) { | |
796 | case NFQNL_CFG_CMD_BIND: | |
797 | if (queue) | |
798 | return -EBUSY; | |
799 | ||
800 | queue = instance_create(queue_num, NETLINK_CB(skb).pid); | |
801 | if (!queue) | |
802 | return -EINVAL; | |
803 | break; | |
804 | case NFQNL_CFG_CMD_UNBIND: | |
805 | if (!queue) | |
806 | return -ENODEV; | |
7af4cc3f HW |
807 | instance_destroy(queue); |
808 | break; | |
809 | case NFQNL_CFG_CMD_PF_BIND: | |
810 | QDEBUG("registering queue handler for pf=%u\n", | |
811 | ntohs(cmd->pf)); | |
bbd86b9f | 812 | ret = nf_register_queue_handler(ntohs(cmd->pf), &nfqh); |
7af4cc3f HW |
813 | break; |
814 | case NFQNL_CFG_CMD_PF_UNBIND: | |
815 | QDEBUG("unregistering queue handler for pf=%u\n", | |
816 | ntohs(cmd->pf)); | |
ce7663d8 | 817 | ret = nf_unregister_queue_handler(ntohs(cmd->pf), &nfqh); |
7af4cc3f HW |
818 | break; |
819 | default: | |
838ab636 HW |
820 | ret = -EINVAL; |
821 | break; | |
7af4cc3f | 822 | } |
7af4cc3f HW |
823 | } |
824 | ||
df6fb868 | 825 | if (nfqa[NFQA_CFG_PARAMS]) { |
7af4cc3f | 826 | struct nfqnl_msg_config_params *params; |
7af4cc3f | 827 | |
406dbfc9 | 828 | if (!queue) { |
a3c8e7fd | 829 | ret = -ENODEV; |
406dbfc9 PM |
830 | goto out_put; |
831 | } | |
df6fb868 | 832 | params = nla_data(nfqa[NFQA_CFG_PARAMS]); |
7af4cc3f HW |
833 | nfqnl_set_mode(queue, params->copy_mode, |
834 | ntohl(params->copy_range)); | |
835 | } | |
836 | ||
df6fb868 | 837 | if (nfqa[NFQA_CFG_QUEUE_MAXLEN]) { |
829e17a1 | 838 | __be32 *queue_maxlen; |
a3c8e7fd PM |
839 | |
840 | if (!queue) { | |
841 | ret = -ENODEV; | |
842 | goto out_put; | |
843 | } | |
df6fb868 | 844 | queue_maxlen = nla_data(nfqa[NFQA_CFG_QUEUE_MAXLEN]); |
829e17a1 EL |
845 | spin_lock_bh(&queue->lock); |
846 | queue->queue_maxlen = ntohl(*queue_maxlen); | |
847 | spin_unlock_bh(&queue->lock); | |
848 | } | |
849 | ||
838ab636 HW |
850 | out_put: |
851 | instance_put(queue); | |
852 | return ret; | |
7af4cc3f HW |
853 | } |
854 | ||
7c8d4cb4 | 855 | static const struct nfnl_callback nfqnl_cb[NFQNL_MSG_MAX] = { |
7af4cc3f | 856 | [NFQNL_MSG_PACKET] = { .call = nfqnl_recv_unsupp, |
37d2e7a2 | 857 | .attr_count = NFQA_MAX, }, |
7af4cc3f | 858 | [NFQNL_MSG_VERDICT] = { .call = nfqnl_recv_verdict, |
5bf75853 PM |
859 | .attr_count = NFQA_MAX, |
860 | .policy = nfqa_verdict_policy }, | |
7af4cc3f | 861 | [NFQNL_MSG_CONFIG] = { .call = nfqnl_recv_config, |
5bf75853 PM |
862 | .attr_count = NFQA_CFG_MAX, |
863 | .policy = nfqa_cfg_policy }, | |
7af4cc3f HW |
864 | }; |
865 | ||
7c8d4cb4 | 866 | static const struct nfnetlink_subsystem nfqnl_subsys = { |
7af4cc3f HW |
867 | .name = "nf_queue", |
868 | .subsys_id = NFNL_SUBSYS_QUEUE, | |
869 | .cb_count = NFQNL_MSG_MAX, | |
7af4cc3f HW |
870 | .cb = nfqnl_cb, |
871 | }; | |
872 | ||
838ab636 HW |
873 | #ifdef CONFIG_PROC_FS |
874 | struct iter_state { | |
875 | unsigned int bucket; | |
876 | }; | |
877 | ||
878 | static struct hlist_node *get_first(struct seq_file *seq) | |
879 | { | |
880 | struct iter_state *st = seq->private; | |
881 | ||
882 | if (!st) | |
883 | return NULL; | |
884 | ||
885 | for (st->bucket = 0; st->bucket < INSTANCE_BUCKETS; st->bucket++) { | |
886 | if (!hlist_empty(&instance_table[st->bucket])) | |
887 | return instance_table[st->bucket].first; | |
888 | } | |
889 | return NULL; | |
890 | } | |
891 | ||
892 | static struct hlist_node *get_next(struct seq_file *seq, struct hlist_node *h) | |
893 | { | |
894 | struct iter_state *st = seq->private; | |
895 | ||
896 | h = h->next; | |
897 | while (!h) { | |
898 | if (++st->bucket >= INSTANCE_BUCKETS) | |
899 | return NULL; | |
900 | ||
901 | h = instance_table[st->bucket].first; | |
902 | } | |
903 | return h; | |
904 | } | |
905 | ||
906 | static struct hlist_node *get_idx(struct seq_file *seq, loff_t pos) | |
907 | { | |
908 | struct hlist_node *head; | |
909 | head = get_first(seq); | |
910 | ||
911 | if (head) | |
912 | while (pos && (head = get_next(seq, head))) | |
913 | pos--; | |
914 | return pos ? NULL : head; | |
915 | } | |
916 | ||
917 | static void *seq_start(struct seq_file *seq, loff_t *pos) | |
918 | { | |
919 | read_lock_bh(&instances_lock); | |
920 | return get_idx(seq, *pos); | |
921 | } | |
922 | ||
923 | static void *seq_next(struct seq_file *s, void *v, loff_t *pos) | |
924 | { | |
925 | (*pos)++; | |
926 | return get_next(s, v); | |
927 | } | |
928 | ||
929 | static void seq_stop(struct seq_file *s, void *v) | |
930 | { | |
931 | read_unlock_bh(&instances_lock); | |
932 | } | |
933 | ||
934 | static int seq_show(struct seq_file *s, void *v) | |
935 | { | |
936 | const struct nfqnl_instance *inst = v; | |
937 | ||
938 | return seq_printf(s, "%5d %6d %5d %1d %5d %5d %5d %8d %2d\n", | |
939 | inst->queue_num, | |
940 | inst->peer_pid, inst->queue_total, | |
941 | inst->copy_mode, inst->copy_range, | |
942 | inst->queue_dropped, inst->queue_user_dropped, | |
e48b9b2f | 943 | inst->id_sequence, |
838ab636 HW |
944 | atomic_read(&inst->use)); |
945 | } | |
946 | ||
56b3d975 | 947 | static const struct seq_operations nfqnl_seq_ops = { |
838ab636 HW |
948 | .start = seq_start, |
949 | .next = seq_next, | |
950 | .stop = seq_stop, | |
951 | .show = seq_show, | |
952 | }; | |
953 | ||
954 | static int nfqnl_open(struct inode *inode, struct file *file) | |
955 | { | |
e2da5913 PE |
956 | return seq_open_private(file, &nfqnl_seq_ops, |
957 | sizeof(struct iter_state)); | |
838ab636 HW |
958 | } |
959 | ||
da7071d7 | 960 | static const struct file_operations nfqnl_file_ops = { |
838ab636 HW |
961 | .owner = THIS_MODULE, |
962 | .open = nfqnl_open, | |
963 | .read = seq_read, | |
964 | .llseek = seq_lseek, | |
965 | .release = seq_release_private, | |
966 | }; | |
967 | ||
968 | #endif /* PROC_FS */ | |
969 | ||
32292a7f | 970 | static int __init nfnetlink_queue_init(void) |
7af4cc3f | 971 | { |
838ab636 HW |
972 | int i, status = -ENOMEM; |
973 | #ifdef CONFIG_PROC_FS | |
974 | struct proc_dir_entry *proc_nfqueue; | |
975 | #endif | |
601e68e1 | 976 | |
838ab636 HW |
977 | for (i = 0; i < INSTANCE_BUCKETS; i++) |
978 | INIT_HLIST_HEAD(&instance_table[i]); | |
979 | ||
7af4cc3f HW |
980 | netlink_register_notifier(&nfqnl_rtnl_notifier); |
981 | status = nfnetlink_subsys_register(&nfqnl_subsys); | |
982 | if (status < 0) { | |
983 | printk(KERN_ERR "nf_queue: failed to create netlink socket\n"); | |
984 | goto cleanup_netlink_notifier; | |
985 | } | |
986 | ||
838ab636 HW |
987 | #ifdef CONFIG_PROC_FS |
988 | proc_nfqueue = create_proc_entry("nfnetlink_queue", 0440, | |
989 | proc_net_netfilter); | |
990 | if (!proc_nfqueue) | |
991 | goto cleanup_subsys; | |
992 | proc_nfqueue->proc_fops = &nfqnl_file_ops; | |
993 | #endif | |
994 | ||
7af4cc3f HW |
995 | register_netdevice_notifier(&nfqnl_dev_notifier); |
996 | return status; | |
997 | ||
838ab636 HW |
998 | #ifdef CONFIG_PROC_FS |
999 | cleanup_subsys: | |
7af4cc3f | 1000 | nfnetlink_subsys_unregister(&nfqnl_subsys); |
32292a7f | 1001 | #endif |
7af4cc3f HW |
1002 | cleanup_netlink_notifier: |
1003 | netlink_unregister_notifier(&nfqnl_rtnl_notifier); | |
1004 | return status; | |
1005 | } | |
1006 | ||
65b4b4e8 | 1007 | static void __exit nfnetlink_queue_fini(void) |
7af4cc3f | 1008 | { |
32292a7f PM |
1009 | nf_unregister_queue_handlers(&nfqh); |
1010 | unregister_netdevice_notifier(&nfqnl_dev_notifier); | |
1011 | #ifdef CONFIG_PROC_FS | |
1012 | remove_proc_entry("nfnetlink_queue", proc_net_netfilter); | |
1013 | #endif | |
1014 | nfnetlink_subsys_unregister(&nfqnl_subsys); | |
1015 | netlink_unregister_notifier(&nfqnl_rtnl_notifier); | |
7af4cc3f HW |
1016 | } |
1017 | ||
1018 | MODULE_DESCRIPTION("netfilter packet queue handler"); | |
1019 | MODULE_AUTHOR("Harald Welte <laforge@netfilter.org>"); | |
1020 | MODULE_LICENSE("GPL"); | |
1021 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_QUEUE); | |
1022 | ||
65b4b4e8 AM |
1023 | module_init(nfnetlink_queue_init); |
1024 | module_exit(nfnetlink_queue_fini); |