Commit | Line | Data |
---|---|---|
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 */ | |
9872bec7 | 50 | struct rcu_head rcu; |
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 | 70 | |
9872bec7 | 71 | static DEFINE_SPINLOCK(instances_lock); |
7af4cc3f | 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 * | |
9872bec7 | 82 | instance_lookup(u_int16_t queue_num) |
7af4cc3f HW |
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)]; | |
9872bec7 | 89 | hlist_for_each_entry_rcu(inst, pos, head, hlist) { |
7af4cc3f HW |
90 | if (inst->queue_num == queue_num) |
91 | return inst; | |
92 | } | |
93 | return NULL; | |
94 | } | |
95 | ||
7af4cc3f HW |
96 | static struct nfqnl_instance * |
97 | instance_create(u_int16_t queue_num, int pid) | |
98 | { | |
99 | struct nfqnl_instance *inst; | |
9872bec7 | 100 | unsigned int h; |
7af4cc3f HW |
101 | |
102 | QDEBUG("entering for queue_num=%u, pid=%d\n", queue_num, pid); | |
103 | ||
9872bec7 PM |
104 | spin_lock(&instances_lock); |
105 | if (instance_lookup(queue_num)) { | |
7af4cc3f HW |
106 | inst = NULL; |
107 | QDEBUG("aborting, instance already exists\n"); | |
108 | goto out_unlock; | |
109 | } | |
110 | ||
10dfdc69 | 111 | inst = kzalloc(sizeof(*inst), GFP_ATOMIC); |
7af4cc3f HW |
112 | if (!inst) |
113 | goto out_unlock; | |
114 | ||
7af4cc3f HW |
115 | inst->queue_num = queue_num; |
116 | inst->peer_pid = pid; | |
117 | inst->queue_maxlen = NFQNL_QMAX_DEFAULT; | |
118 | inst->copy_range = 0xfffff; | |
119 | inst->copy_mode = NFQNL_COPY_NONE; | |
181a46a5 | 120 | spin_lock_init(&inst->lock); |
7af4cc3f | 121 | INIT_LIST_HEAD(&inst->queue_list); |
9872bec7 | 122 | INIT_RCU_HEAD(&inst->rcu); |
7af4cc3f HW |
123 | |
124 | if (!try_module_get(THIS_MODULE)) | |
125 | goto out_free; | |
126 | ||
9872bec7 PM |
127 | h = instance_hashfn(queue_num); |
128 | hlist_add_head_rcu(&inst->hlist, &instance_table[h]); | |
7af4cc3f | 129 | |
9872bec7 | 130 | spin_unlock(&instances_lock); |
7af4cc3f HW |
131 | |
132 | QDEBUG("successfully created new instance\n"); | |
133 | ||
134 | return inst; | |
135 | ||
136 | out_free: | |
137 | kfree(inst); | |
138 | out_unlock: | |
9872bec7 | 139 | spin_unlock(&instances_lock); |
7af4cc3f HW |
140 | return NULL; |
141 | } | |
142 | ||
b43d8d85 PM |
143 | static void nfqnl_flush(struct nfqnl_instance *queue, nfqnl_cmpfn cmpfn, |
144 | unsigned long data); | |
7af4cc3f HW |
145 | |
146 | static void | |
9872bec7 | 147 | instance_destroy_rcu(struct rcu_head *head) |
7af4cc3f | 148 | { |
9872bec7 PM |
149 | struct nfqnl_instance *inst = container_of(head, struct nfqnl_instance, |
150 | rcu); | |
7af4cc3f | 151 | |
b43d8d85 | 152 | nfqnl_flush(inst, NULL, 0); |
9872bec7 | 153 | kfree(inst); |
7af4cc3f HW |
154 | module_put(THIS_MODULE); |
155 | } | |
156 | ||
9872bec7 | 157 | static void |
7af4cc3f HW |
158 | __instance_destroy(struct nfqnl_instance *inst) |
159 | { | |
9872bec7 PM |
160 | hlist_del_rcu(&inst->hlist); |
161 | call_rcu(&inst->rcu, instance_destroy_rcu); | |
7af4cc3f HW |
162 | } |
163 | ||
9872bec7 | 164 | static void |
7af4cc3f HW |
165 | instance_destroy(struct nfqnl_instance *inst) |
166 | { | |
9872bec7 PM |
167 | spin_lock(&instances_lock); |
168 | __instance_destroy(inst); | |
169 | spin_unlock(&instances_lock); | |
7af4cc3f HW |
170 | } |
171 | ||
7af4cc3f | 172 | static inline void |
02f014d8 | 173 | __enqueue_entry(struct nfqnl_instance *queue, struct nf_queue_entry *entry) |
7af4cc3f | 174 | { |
0ac41e81 | 175 | list_add_tail(&entry->list, &queue->queue_list); |
7af4cc3f HW |
176 | queue->queue_total++; |
177 | } | |
178 | ||
02f014d8 | 179 | static struct nf_queue_entry * |
b43d8d85 | 180 | find_dequeue_entry(struct nfqnl_instance *queue, unsigned int id) |
7af4cc3f | 181 | { |
02f014d8 | 182 | struct nf_queue_entry *entry = NULL, *i; |
601e68e1 | 183 | |
7af4cc3f | 184 | spin_lock_bh(&queue->lock); |
b43d8d85 PM |
185 | |
186 | list_for_each_entry(i, &queue->queue_list, list) { | |
187 | if (i->id == id) { | |
188 | entry = i; | |
189 | break; | |
190 | } | |
191 | } | |
192 | ||
193 | if (entry) { | |
194 | list_del(&entry->list); | |
195 | queue->queue_total--; | |
196 | } | |
197 | ||
7af4cc3f HW |
198 | spin_unlock_bh(&queue->lock); |
199 | ||
200 | return entry; | |
201 | } | |
202 | ||
203 | static void | |
b43d8d85 | 204 | nfqnl_flush(struct nfqnl_instance *queue, nfqnl_cmpfn cmpfn, unsigned long data) |
7af4cc3f | 205 | { |
02f014d8 | 206 | struct nf_queue_entry *entry, *next; |
b43d8d85 | 207 | |
7af4cc3f | 208 | spin_lock_bh(&queue->lock); |
b43d8d85 PM |
209 | list_for_each_entry_safe(entry, next, &queue->queue_list, list) { |
210 | if (!cmpfn || cmpfn(entry, data)) { | |
211 | list_del(&entry->list); | |
212 | queue->queue_total--; | |
4b3d15ef | 213 | nf_reinject(entry, NF_DROP); |
b43d8d85 PM |
214 | } |
215 | } | |
7af4cc3f HW |
216 | spin_unlock_bh(&queue->lock); |
217 | } | |
218 | ||
219 | static struct sk_buff * | |
220 | nfqnl_build_packet_message(struct nfqnl_instance *queue, | |
02f014d8 | 221 | struct nf_queue_entry *entry, int *errp) |
7af4cc3f | 222 | { |
27a884dc | 223 | sk_buff_data_t old_tail; |
7af4cc3f HW |
224 | size_t size; |
225 | size_t data_len = 0; | |
226 | struct sk_buff *skb; | |
227 | struct nfqnl_msg_packet_hdr pmsg; | |
228 | struct nlmsghdr *nlh; | |
229 | struct nfgenmsg *nfmsg; | |
3e4ead4f JJ |
230 | struct sk_buff *entskb = entry->skb; |
231 | struct net_device *indev; | |
232 | struct net_device *outdev; | |
98a4a861 | 233 | __be32 tmp_uint; |
7af4cc3f HW |
234 | |
235 | QDEBUG("entered\n"); | |
236 | ||
df6fb868 PM |
237 | size = NLMSG_ALIGN(sizeof(struct nfgenmsg)) |
238 | + nla_total_size(sizeof(struct nfqnl_msg_packet_hdr)) | |
239 | + nla_total_size(sizeof(u_int32_t)) /* ifindex */ | |
240 | + nla_total_size(sizeof(u_int32_t)) /* ifindex */ | |
fbcd923c | 241 | #ifdef CONFIG_BRIDGE_NETFILTER |
df6fb868 PM |
242 | + nla_total_size(sizeof(u_int32_t)) /* ifindex */ |
243 | + nla_total_size(sizeof(u_int32_t)) /* ifindex */ | |
fbcd923c | 244 | #endif |
df6fb868 PM |
245 | + nla_total_size(sizeof(u_int32_t)) /* mark */ |
246 | + nla_total_size(sizeof(struct nfqnl_msg_packet_hw)) | |
247 | + nla_total_size(sizeof(struct nfqnl_msg_packet_timestamp)); | |
7af4cc3f | 248 | |
02f014d8 | 249 | outdev = entry->outdev; |
3e4ead4f | 250 | |
7af4cc3f | 251 | spin_lock_bh(&queue->lock); |
601e68e1 | 252 | |
7af4cc3f HW |
253 | switch (queue->copy_mode) { |
254 | case NFQNL_COPY_META: | |
255 | case NFQNL_COPY_NONE: | |
256 | data_len = 0; | |
257 | break; | |
601e68e1 | 258 | |
7af4cc3f | 259 | case NFQNL_COPY_PACKET: |
84fa7933 PM |
260 | if ((entskb->ip_summed == CHECKSUM_PARTIAL || |
261 | entskb->ip_summed == CHECKSUM_COMPLETE) && | |
262 | (*errp = skb_checksum_help(entskb))) { | |
e7dfb09a PM |
263 | spin_unlock_bh(&queue->lock); |
264 | return NULL; | |
265 | } | |
601e68e1 | 266 | if (queue->copy_range == 0 |
3e4ead4f JJ |
267 | || queue->copy_range > entskb->len) |
268 | data_len = entskb->len; | |
7af4cc3f HW |
269 | else |
270 | data_len = queue->copy_range; | |
601e68e1 | 271 | |
df6fb868 | 272 | size += nla_total_size(data_len); |
7af4cc3f | 273 | break; |
601e68e1 | 274 | |
7af4cc3f HW |
275 | default: |
276 | *errp = -EINVAL; | |
277 | spin_unlock_bh(&queue->lock); | |
278 | return NULL; | |
279 | } | |
280 | ||
e48b9b2f PM |
281 | entry->id = queue->id_sequence++; |
282 | ||
7af4cc3f HW |
283 | spin_unlock_bh(&queue->lock); |
284 | ||
285 | skb = alloc_skb(size, GFP_ATOMIC); | |
286 | if (!skb) | |
287 | goto nlmsg_failure; | |
601e68e1 | 288 | |
27a884dc | 289 | old_tail = skb->tail; |
601e68e1 | 290 | nlh = NLMSG_PUT(skb, 0, 0, |
7af4cc3f HW |
291 | NFNL_SUBSYS_QUEUE << 8 | NFQNL_MSG_PACKET, |
292 | sizeof(struct nfgenmsg)); | |
293 | nfmsg = NLMSG_DATA(nlh); | |
02f014d8 | 294 | nfmsg->nfgen_family = entry->pf; |
7af4cc3f HW |
295 | nfmsg->version = NFNETLINK_V0; |
296 | nfmsg->res_id = htons(queue->queue_num); | |
297 | ||
298 | pmsg.packet_id = htonl(entry->id); | |
febf0a43 | 299 | pmsg.hw_protocol = entskb->protocol; |
02f014d8 | 300 | pmsg.hook = entry->hook; |
7af4cc3f | 301 | |
df6fb868 | 302 | NLA_PUT(skb, NFQA_PACKET_HDR, sizeof(pmsg), &pmsg); |
7af4cc3f | 303 | |
02f014d8 | 304 | indev = entry->indev; |
3e4ead4f JJ |
305 | if (indev) { |
306 | tmp_uint = htonl(indev->ifindex); | |
fbcd923c | 307 | #ifndef CONFIG_BRIDGE_NETFILTER |
df6fb868 | 308 | NLA_PUT(skb, NFQA_IFINDEX_INDEV, sizeof(tmp_uint), &tmp_uint); |
fbcd923c | 309 | #else |
02f014d8 | 310 | if (entry->pf == PF_BRIDGE) { |
fbcd923c | 311 | /* Case 1: indev is physical input device, we need to |
601e68e1 | 312 | * look for bridge group (when called from |
fbcd923c | 313 | * netfilter_bridge) */ |
df6fb868 | 314 | NLA_PUT(skb, NFQA_IFINDEX_PHYSINDEV, sizeof(tmp_uint), |
fbcd923c HW |
315 | &tmp_uint); |
316 | /* this is the bridge group "brX" */ | |
3e4ead4f | 317 | tmp_uint = htonl(indev->br_port->br->dev->ifindex); |
df6fb868 | 318 | NLA_PUT(skb, NFQA_IFINDEX_INDEV, sizeof(tmp_uint), |
fbcd923c HW |
319 | &tmp_uint); |
320 | } else { | |
321 | /* Case 2: indev is bridge group, we need to look for | |
322 | * physical device (when called from ipv4) */ | |
df6fb868 | 323 | NLA_PUT(skb, NFQA_IFINDEX_INDEV, sizeof(tmp_uint), |
fbcd923c | 324 | &tmp_uint); |
3e4ead4f JJ |
325 | if (entskb->nf_bridge |
326 | && entskb->nf_bridge->physindev) { | |
327 | tmp_uint = htonl(entskb->nf_bridge->physindev->ifindex); | |
df6fb868 | 328 | NLA_PUT(skb, NFQA_IFINDEX_PHYSINDEV, |
fbcd923c HW |
329 | sizeof(tmp_uint), &tmp_uint); |
330 | } | |
331 | } | |
332 | #endif | |
7af4cc3f HW |
333 | } |
334 | ||
3e4ead4f JJ |
335 | if (outdev) { |
336 | tmp_uint = htonl(outdev->ifindex); | |
fbcd923c | 337 | #ifndef CONFIG_BRIDGE_NETFILTER |
df6fb868 | 338 | NLA_PUT(skb, NFQA_IFINDEX_OUTDEV, sizeof(tmp_uint), &tmp_uint); |
fbcd923c | 339 | #else |
02f014d8 | 340 | if (entry->pf == PF_BRIDGE) { |
fbcd923c | 341 | /* Case 1: outdev is physical output device, we need to |
601e68e1 | 342 | * look for bridge group (when called from |
fbcd923c | 343 | * netfilter_bridge) */ |
df6fb868 | 344 | NLA_PUT(skb, NFQA_IFINDEX_PHYSOUTDEV, sizeof(tmp_uint), |
fbcd923c HW |
345 | &tmp_uint); |
346 | /* this is the bridge group "brX" */ | |
3e4ead4f | 347 | tmp_uint = htonl(outdev->br_port->br->dev->ifindex); |
df6fb868 | 348 | NLA_PUT(skb, NFQA_IFINDEX_OUTDEV, sizeof(tmp_uint), |
fbcd923c HW |
349 | &tmp_uint); |
350 | } else { | |
351 | /* Case 2: outdev is bridge group, we need to look for | |
352 | * physical output device (when called from ipv4) */ | |
df6fb868 | 353 | NLA_PUT(skb, NFQA_IFINDEX_OUTDEV, sizeof(tmp_uint), |
fbcd923c | 354 | &tmp_uint); |
3e4ead4f JJ |
355 | if (entskb->nf_bridge |
356 | && entskb->nf_bridge->physoutdev) { | |
357 | tmp_uint = htonl(entskb->nf_bridge->physoutdev->ifindex); | |
df6fb868 | 358 | NLA_PUT(skb, NFQA_IFINDEX_PHYSOUTDEV, |
fbcd923c HW |
359 | sizeof(tmp_uint), &tmp_uint); |
360 | } | |
361 | } | |
362 | #endif | |
7af4cc3f HW |
363 | } |
364 | ||
82e91ffe TG |
365 | if (entskb->mark) { |
366 | tmp_uint = htonl(entskb->mark); | |
df6fb868 | 367 | NLA_PUT(skb, NFQA_MARK, sizeof(u_int32_t), &tmp_uint); |
7af4cc3f HW |
368 | } |
369 | ||
b95cce35 | 370 | if (indev && entskb->dev) { |
7af4cc3f | 371 | struct nfqnl_msg_packet_hw phw; |
b95cce35 SH |
372 | int len = dev_parse_header(entskb, phw.hw_addr); |
373 | if (len) { | |
374 | phw.hw_addrlen = htons(len); | |
df6fb868 | 375 | NLA_PUT(skb, NFQA_HWADDR, sizeof(phw), &phw); |
b95cce35 | 376 | } |
7af4cc3f HW |
377 | } |
378 | ||
b7aa0bf7 | 379 | if (entskb->tstamp.tv64) { |
7af4cc3f | 380 | struct nfqnl_msg_packet_timestamp ts; |
b7aa0bf7 ED |
381 | struct timeval tv = ktime_to_timeval(entskb->tstamp); |
382 | ts.sec = cpu_to_be64(tv.tv_sec); | |
383 | ts.usec = cpu_to_be64(tv.tv_usec); | |
7af4cc3f | 384 | |
df6fb868 | 385 | NLA_PUT(skb, NFQA_TIMESTAMP, sizeof(ts), &ts); |
7af4cc3f HW |
386 | } |
387 | ||
388 | if (data_len) { | |
df6fb868 PM |
389 | struct nlattr *nla; |
390 | int size = nla_attr_size(data_len); | |
7af4cc3f | 391 | |
df6fb868 | 392 | if (skb_tailroom(skb) < nla_total_size(data_len)) { |
7af4cc3f HW |
393 | printk(KERN_WARNING "nf_queue: no tailroom!\n"); |
394 | goto nlmsg_failure; | |
395 | } | |
396 | ||
df6fb868 PM |
397 | nla = (struct nlattr *)skb_put(skb, nla_total_size(data_len)); |
398 | nla->nla_type = NFQA_PAYLOAD; | |
399 | nla->nla_len = size; | |
7af4cc3f | 400 | |
df6fb868 | 401 | if (skb_copy_bits(entskb, 0, nla_data(nla), data_len)) |
7af4cc3f HW |
402 | BUG(); |
403 | } | |
601e68e1 | 404 | |
7af4cc3f HW |
405 | nlh->nlmsg_len = skb->tail - old_tail; |
406 | return skb; | |
407 | ||
408 | nlmsg_failure: | |
df6fb868 | 409 | nla_put_failure: |
7af4cc3f HW |
410 | if (skb) |
411 | kfree_skb(skb); | |
412 | *errp = -EINVAL; | |
413 | if (net_ratelimit()) | |
414 | printk(KERN_ERR "nf_queue: error creating packet message\n"); | |
415 | return NULL; | |
416 | } | |
417 | ||
418 | static int | |
02f014d8 | 419 | nfqnl_enqueue_packet(struct nf_queue_entry *entry, unsigned int queuenum) |
7af4cc3f HW |
420 | { |
421 | int status = -EINVAL; | |
422 | struct sk_buff *nskb; | |
423 | struct nfqnl_instance *queue; | |
7af4cc3f HW |
424 | |
425 | QDEBUG("entered\n"); | |
426 | ||
9872bec7 PM |
427 | /* rcu_read_lock()ed by nf_hook_slow() */ |
428 | queue = instance_lookup(queuenum); | |
7af4cc3f HW |
429 | if (!queue) { |
430 | QDEBUG("no queue instance matching\n"); | |
431 | return -EINVAL; | |
432 | } | |
433 | ||
434 | if (queue->copy_mode == NFQNL_COPY_NONE) { | |
435 | QDEBUG("mode COPY_NONE, aborting\n"); | |
9872bec7 | 436 | return -EAGAIN; |
7af4cc3f HW |
437 | } |
438 | ||
7af4cc3f HW |
439 | nskb = nfqnl_build_packet_message(queue, entry, &status); |
440 | if (nskb == NULL) | |
9872bec7 | 441 | return status; |
601e68e1 | 442 | |
7af4cc3f | 443 | spin_lock_bh(&queue->lock); |
601e68e1 | 444 | |
7af4cc3f | 445 | if (!queue->peer_pid) |
601e68e1 | 446 | goto err_out_free_nskb; |
7af4cc3f HW |
447 | |
448 | if (queue->queue_total >= queue->queue_maxlen) { | |
601e68e1 | 449 | queue->queue_dropped++; |
7af4cc3f HW |
450 | status = -ENOSPC; |
451 | if (net_ratelimit()) | |
601e68e1 YH |
452 | printk(KERN_WARNING "nf_queue: full at %d entries, " |
453 | "dropping packets(s). Dropped: %d\n", | |
7af4cc3f HW |
454 | queue->queue_total, queue->queue_dropped); |
455 | goto err_out_free_nskb; | |
456 | } | |
457 | ||
458 | /* nfnetlink_unicast will either free the nskb or add it to a socket */ | |
459 | status = nfnetlink_unicast(nskb, queue->peer_pid, MSG_DONTWAIT); | |
460 | if (status < 0) { | |
601e68e1 | 461 | queue->queue_user_dropped++; |
7af4cc3f HW |
462 | goto err_out_unlock; |
463 | } | |
464 | ||
465 | __enqueue_entry(queue, entry); | |
466 | ||
467 | spin_unlock_bh(&queue->lock); | |
468 | return status; | |
469 | ||
470 | err_out_free_nskb: | |
601e68e1 YH |
471 | kfree_skb(nskb); |
472 | ||
7af4cc3f HW |
473 | err_out_unlock: |
474 | spin_unlock_bh(&queue->lock); | |
7af4cc3f HW |
475 | return status; |
476 | } | |
477 | ||
478 | static int | |
02f014d8 | 479 | nfqnl_mangle(void *data, int data_len, struct nf_queue_entry *e) |
7af4cc3f HW |
480 | { |
481 | int diff; | |
2ca7b0ac | 482 | int err; |
7af4cc3f HW |
483 | |
484 | diff = data_len - e->skb->len; | |
d8a585d7 PM |
485 | if (diff < 0) { |
486 | if (pskb_trim(e->skb, data_len)) | |
487 | return -ENOMEM; | |
488 | } else if (diff > 0) { | |
7af4cc3f HW |
489 | if (data_len > 0xFFFF) |
490 | return -EINVAL; | |
491 | if (diff > skb_tailroom(e->skb)) { | |
2ca7b0ac HX |
492 | err = pskb_expand_head(e->skb, 0, |
493 | diff - skb_tailroom(e->skb), | |
494 | GFP_ATOMIC); | |
495 | if (err) { | |
1158ba27 | 496 | printk(KERN_WARNING "nf_queue: OOM " |
7af4cc3f | 497 | "in mangle, dropping packet\n"); |
2ca7b0ac | 498 | return err; |
7af4cc3f | 499 | } |
7af4cc3f HW |
500 | } |
501 | skb_put(e->skb, diff); | |
502 | } | |
37d41879 | 503 | if (!skb_make_writable(e->skb, data_len)) |
7af4cc3f | 504 | return -ENOMEM; |
27d7ff46 | 505 | skb_copy_to_linear_data(e->skb, data, data_len); |
e7dfb09a | 506 | e->skb->ip_summed = CHECKSUM_NONE; |
7af4cc3f HW |
507 | return 0; |
508 | } | |
509 | ||
7af4cc3f HW |
510 | static int |
511 | nfqnl_set_mode(struct nfqnl_instance *queue, | |
512 | unsigned char mode, unsigned int range) | |
513 | { | |
c5de0dfd | 514 | int status = 0; |
7af4cc3f HW |
515 | |
516 | spin_lock_bh(&queue->lock); | |
c5de0dfd PM |
517 | switch (mode) { |
518 | case NFQNL_COPY_NONE: | |
519 | case NFQNL_COPY_META: | |
520 | queue->copy_mode = mode; | |
521 | queue->copy_range = 0; | |
522 | break; | |
523 | ||
524 | case NFQNL_COPY_PACKET: | |
525 | queue->copy_mode = mode; | |
526 | /* we're using struct nlattr which has 16bit nla_len */ | |
527 | if (range > 0xffff) | |
528 | queue->copy_range = 0xffff; | |
529 | else | |
530 | queue->copy_range = range; | |
531 | break; | |
532 | ||
533 | default: | |
534 | status = -EINVAL; | |
535 | ||
536 | } | |
7af4cc3f HW |
537 | spin_unlock_bh(&queue->lock); |
538 | ||
539 | return status; | |
540 | } | |
541 | ||
542 | static int | |
02f014d8 | 543 | dev_cmp(struct nf_queue_entry *entry, unsigned long ifindex) |
7af4cc3f | 544 | { |
02f014d8 PM |
545 | if (entry->indev) |
546 | if (entry->indev->ifindex == ifindex) | |
7af4cc3f | 547 | return 1; |
02f014d8 PM |
548 | if (entry->outdev) |
549 | if (entry->outdev->ifindex == ifindex) | |
7af4cc3f | 550 | return 1; |
ef47c6a7 PM |
551 | #ifdef CONFIG_BRIDGE_NETFILTER |
552 | if (entry->skb->nf_bridge) { | |
553 | if (entry->skb->nf_bridge->physindev && | |
554 | entry->skb->nf_bridge->physindev->ifindex == ifindex) | |
555 | return 1; | |
556 | if (entry->skb->nf_bridge->physoutdev && | |
557 | entry->skb->nf_bridge->physoutdev->ifindex == ifindex) | |
558 | return 1; | |
559 | } | |
560 | #endif | |
7af4cc3f HW |
561 | return 0; |
562 | } | |
563 | ||
564 | /* drop all packets with either indev or outdev == ifindex from all queue | |
565 | * instances */ | |
566 | static void | |
567 | nfqnl_dev_drop(int ifindex) | |
568 | { | |
569 | int i; | |
601e68e1 | 570 | |
7af4cc3f HW |
571 | QDEBUG("entering for ifindex %u\n", ifindex); |
572 | ||
9872bec7 | 573 | rcu_read_lock(); |
7af4cc3f | 574 | |
9872bec7 | 575 | for (i = 0; i < INSTANCE_BUCKETS; i++) { |
7af4cc3f HW |
576 | struct hlist_node *tmp; |
577 | struct nfqnl_instance *inst; | |
578 | struct hlist_head *head = &instance_table[i]; | |
579 | ||
9872bec7 | 580 | hlist_for_each_entry_rcu(inst, tmp, head, hlist) |
b43d8d85 | 581 | nfqnl_flush(inst, dev_cmp, ifindex); |
7af4cc3f HW |
582 | } |
583 | ||
9872bec7 | 584 | rcu_read_unlock(); |
7af4cc3f HW |
585 | } |
586 | ||
587 | #define RCV_SKB_FAIL(err) do { netlink_ack(skb, nlh, (err)); return; } while (0) | |
588 | ||
589 | static int | |
590 | nfqnl_rcv_dev_event(struct notifier_block *this, | |
591 | unsigned long event, void *ptr) | |
592 | { | |
593 | struct net_device *dev = ptr; | |
594 | ||
e9dc8653 EB |
595 | if (dev->nd_net != &init_net) |
596 | return NOTIFY_DONE; | |
597 | ||
7af4cc3f HW |
598 | /* Drop any packets associated with the downed device */ |
599 | if (event == NETDEV_DOWN) | |
600 | nfqnl_dev_drop(dev->ifindex); | |
601 | return NOTIFY_DONE; | |
602 | } | |
603 | ||
604 | static struct notifier_block nfqnl_dev_notifier = { | |
605 | .notifier_call = nfqnl_rcv_dev_event, | |
606 | }; | |
607 | ||
608 | static int | |
609 | nfqnl_rcv_nl_event(struct notifier_block *this, | |
610 | unsigned long event, void *ptr) | |
611 | { | |
612 | struct netlink_notify *n = ptr; | |
613 | ||
614 | if (event == NETLINK_URELEASE && | |
615 | n->protocol == NETLINK_NETFILTER && n->pid) { | |
616 | int i; | |
617 | ||
618 | /* destroy all instances for this pid */ | |
9872bec7 PM |
619 | spin_lock(&instances_lock); |
620 | for (i = 0; i < INSTANCE_BUCKETS; i++) { | |
7af4cc3f HW |
621 | struct hlist_node *tmp, *t2; |
622 | struct nfqnl_instance *inst; | |
623 | struct hlist_head *head = &instance_table[i]; | |
624 | ||
625 | hlist_for_each_entry_safe(inst, tmp, t2, head, hlist) { | |
b4b51029 EB |
626 | if ((n->net == &init_net) && |
627 | (n->pid == inst->peer_pid)) | |
7af4cc3f HW |
628 | __instance_destroy(inst); |
629 | } | |
630 | } | |
9872bec7 | 631 | spin_unlock(&instances_lock); |
7af4cc3f HW |
632 | } |
633 | return NOTIFY_DONE; | |
634 | } | |
635 | ||
636 | static struct notifier_block nfqnl_rtnl_notifier = { | |
637 | .notifier_call = nfqnl_rcv_nl_event, | |
638 | }; | |
639 | ||
5bf75853 PM |
640 | static const struct nla_policy nfqa_verdict_policy[NFQA_MAX+1] = { |
641 | [NFQA_VERDICT_HDR] = { .len = sizeof(struct nfqnl_msg_verdict_hdr) }, | |
642 | [NFQA_MARK] = { .type = NLA_U32 }, | |
643 | [NFQA_PAYLOAD] = { .type = NLA_UNSPEC }, | |
838ab636 HW |
644 | }; |
645 | ||
7af4cc3f HW |
646 | static int |
647 | nfqnl_recv_verdict(struct sock *ctnl, struct sk_buff *skb, | |
df6fb868 | 648 | struct nlmsghdr *nlh, struct nlattr *nfqa[]) |
7af4cc3f HW |
649 | { |
650 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); | |
651 | u_int16_t queue_num = ntohs(nfmsg->res_id); | |
652 | ||
653 | struct nfqnl_msg_verdict_hdr *vhdr; | |
654 | struct nfqnl_instance *queue; | |
655 | unsigned int verdict; | |
02f014d8 | 656 | struct nf_queue_entry *entry; |
838ab636 | 657 | int err; |
7af4cc3f | 658 | |
9872bec7 PM |
659 | rcu_read_lock(); |
660 | queue = instance_lookup(queue_num); | |
661 | if (!queue) { | |
662 | err = -ENODEV; | |
663 | goto err_out_unlock; | |
664 | } | |
7af4cc3f | 665 | |
838ab636 HW |
666 | if (queue->peer_pid != NETLINK_CB(skb).pid) { |
667 | err = -EPERM; | |
9872bec7 | 668 | goto err_out_unlock; |
838ab636 | 669 | } |
7af4cc3f | 670 | |
df6fb868 | 671 | if (!nfqa[NFQA_VERDICT_HDR]) { |
838ab636 | 672 | err = -EINVAL; |
9872bec7 | 673 | goto err_out_unlock; |
838ab636 | 674 | } |
7af4cc3f | 675 | |
df6fb868 | 676 | vhdr = nla_data(nfqa[NFQA_VERDICT_HDR]); |
7af4cc3f HW |
677 | verdict = ntohl(vhdr->verdict); |
678 | ||
838ab636 HW |
679 | if ((verdict & NF_VERDICT_MASK) > NF_MAX_VERDICT) { |
680 | err = -EINVAL; | |
9872bec7 | 681 | goto err_out_unlock; |
838ab636 | 682 | } |
7af4cc3f | 683 | |
b43d8d85 | 684 | entry = find_dequeue_entry(queue, ntohl(vhdr->id)); |
838ab636 HW |
685 | if (entry == NULL) { |
686 | err = -ENOENT; | |
9872bec7 | 687 | goto err_out_unlock; |
838ab636 | 688 | } |
9872bec7 | 689 | rcu_read_unlock(); |
7af4cc3f | 690 | |
df6fb868 PM |
691 | if (nfqa[NFQA_PAYLOAD]) { |
692 | if (nfqnl_mangle(nla_data(nfqa[NFQA_PAYLOAD]), | |
693 | nla_len(nfqa[NFQA_PAYLOAD]), entry) < 0) | |
7af4cc3f HW |
694 | verdict = NF_DROP; |
695 | } | |
696 | ||
df6fb868 | 697 | if (nfqa[NFQA_MARK]) |
82e91ffe | 698 | entry->skb->mark = ntohl(*(__be32 *) |
df6fb868 | 699 | nla_data(nfqa[NFQA_MARK])); |
601e68e1 | 700 | |
4b3d15ef | 701 | nf_reinject(entry, verdict); |
7af4cc3f | 702 | return 0; |
838ab636 | 703 | |
9872bec7 PM |
704 | err_out_unlock: |
705 | rcu_read_unlock(); | |
838ab636 | 706 | return err; |
7af4cc3f HW |
707 | } |
708 | ||
709 | static int | |
710 | nfqnl_recv_unsupp(struct sock *ctnl, struct sk_buff *skb, | |
df6fb868 | 711 | struct nlmsghdr *nlh, struct nlattr *nfqa[]) |
7af4cc3f HW |
712 | { |
713 | return -ENOTSUPP; | |
714 | } | |
715 | ||
5bf75853 PM |
716 | static const struct nla_policy nfqa_cfg_policy[NFQA_CFG_MAX+1] = { |
717 | [NFQA_CFG_CMD] = { .len = sizeof(struct nfqnl_msg_config_cmd) }, | |
718 | [NFQA_CFG_PARAMS] = { .len = sizeof(struct nfqnl_msg_config_params) }, | |
838ab636 HW |
719 | }; |
720 | ||
e3ac5298 | 721 | static const struct nf_queue_handler nfqh = { |
bbd86b9f HW |
722 | .name = "nf_queue", |
723 | .outfn = &nfqnl_enqueue_packet, | |
724 | }; | |
725 | ||
7af4cc3f HW |
726 | static int |
727 | nfqnl_recv_config(struct sock *ctnl, struct sk_buff *skb, | |
df6fb868 | 728 | struct nlmsghdr *nlh, struct nlattr *nfqa[]) |
7af4cc3f HW |
729 | { |
730 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); | |
731 | u_int16_t queue_num = ntohs(nfmsg->res_id); | |
732 | struct nfqnl_instance *queue; | |
9872bec7 | 733 | struct nfqnl_msg_config_cmd *cmd = NULL; |
838ab636 | 734 | int ret = 0; |
7af4cc3f HW |
735 | |
736 | QDEBUG("entering for msg %u\n", NFNL_MSG_TYPE(nlh->nlmsg_type)); | |
737 | ||
9872bec7 PM |
738 | if (nfqa[NFQA_CFG_CMD]) { |
739 | cmd = nla_data(nfqa[NFQA_CFG_CMD]); | |
740 | ||
741 | /* Commands without queue context - might sleep */ | |
742 | switch (cmd->command) { | |
743 | case NFQNL_CFG_CMD_PF_BIND: | |
744 | ret = nf_register_queue_handler(ntohs(cmd->pf), | |
745 | &nfqh); | |
746 | break; | |
747 | case NFQNL_CFG_CMD_PF_UNBIND: | |
748 | ret = nf_unregister_queue_handler(ntohs(cmd->pf), | |
749 | &nfqh); | |
750 | break; | |
751 | default: | |
752 | break; | |
753 | } | |
754 | ||
755 | if (ret < 0) | |
756 | return ret; | |
757 | } | |
758 | ||
759 | rcu_read_lock(); | |
760 | queue = instance_lookup(queue_num); | |
a3c8e7fd PM |
761 | if (queue && queue->peer_pid != NETLINK_CB(skb).pid) { |
762 | ret = -EPERM; | |
9872bec7 | 763 | goto err_out_unlock; |
a3c8e7fd PM |
764 | } |
765 | ||
9872bec7 | 766 | if (cmd != NULL) { |
7af4cc3f HW |
767 | switch (cmd->command) { |
768 | case NFQNL_CFG_CMD_BIND: | |
9872bec7 PM |
769 | if (queue) { |
770 | ret = -EBUSY; | |
771 | goto err_out_unlock; | |
772 | } | |
7af4cc3f | 773 | queue = instance_create(queue_num, NETLINK_CB(skb).pid); |
9872bec7 PM |
774 | if (!queue) { |
775 | ret = -EINVAL; | |
776 | goto err_out_unlock; | |
777 | } | |
7af4cc3f HW |
778 | break; |
779 | case NFQNL_CFG_CMD_UNBIND: | |
9872bec7 PM |
780 | if (!queue) { |
781 | ret = -ENODEV; | |
782 | goto err_out_unlock; | |
783 | } | |
7af4cc3f HW |
784 | instance_destroy(queue); |
785 | break; | |
786 | case NFQNL_CFG_CMD_PF_BIND: | |
7af4cc3f | 787 | case NFQNL_CFG_CMD_PF_UNBIND: |
7af4cc3f HW |
788 | break; |
789 | default: | |
838ab636 HW |
790 | ret = -EINVAL; |
791 | break; | |
7af4cc3f | 792 | } |
7af4cc3f HW |
793 | } |
794 | ||
df6fb868 | 795 | if (nfqa[NFQA_CFG_PARAMS]) { |
7af4cc3f | 796 | struct nfqnl_msg_config_params *params; |
7af4cc3f | 797 | |
406dbfc9 | 798 | if (!queue) { |
a3c8e7fd | 799 | ret = -ENODEV; |
9872bec7 | 800 | goto err_out_unlock; |
406dbfc9 | 801 | } |
df6fb868 | 802 | params = nla_data(nfqa[NFQA_CFG_PARAMS]); |
7af4cc3f HW |
803 | nfqnl_set_mode(queue, params->copy_mode, |
804 | ntohl(params->copy_range)); | |
805 | } | |
806 | ||
df6fb868 | 807 | if (nfqa[NFQA_CFG_QUEUE_MAXLEN]) { |
829e17a1 | 808 | __be32 *queue_maxlen; |
a3c8e7fd PM |
809 | |
810 | if (!queue) { | |
811 | ret = -ENODEV; | |
9872bec7 | 812 | goto err_out_unlock; |
a3c8e7fd | 813 | } |
df6fb868 | 814 | queue_maxlen = nla_data(nfqa[NFQA_CFG_QUEUE_MAXLEN]); |
829e17a1 EL |
815 | spin_lock_bh(&queue->lock); |
816 | queue->queue_maxlen = ntohl(*queue_maxlen); | |
817 | spin_unlock_bh(&queue->lock); | |
818 | } | |
819 | ||
9872bec7 PM |
820 | err_out_unlock: |
821 | rcu_read_unlock(); | |
838ab636 | 822 | return ret; |
7af4cc3f HW |
823 | } |
824 | ||
7c8d4cb4 | 825 | static const struct nfnl_callback nfqnl_cb[NFQNL_MSG_MAX] = { |
7af4cc3f | 826 | [NFQNL_MSG_PACKET] = { .call = nfqnl_recv_unsupp, |
37d2e7a2 | 827 | .attr_count = NFQA_MAX, }, |
7af4cc3f | 828 | [NFQNL_MSG_VERDICT] = { .call = nfqnl_recv_verdict, |
5bf75853 PM |
829 | .attr_count = NFQA_MAX, |
830 | .policy = nfqa_verdict_policy }, | |
7af4cc3f | 831 | [NFQNL_MSG_CONFIG] = { .call = nfqnl_recv_config, |
5bf75853 PM |
832 | .attr_count = NFQA_CFG_MAX, |
833 | .policy = nfqa_cfg_policy }, | |
7af4cc3f HW |
834 | }; |
835 | ||
7c8d4cb4 | 836 | static const struct nfnetlink_subsystem nfqnl_subsys = { |
7af4cc3f HW |
837 | .name = "nf_queue", |
838 | .subsys_id = NFNL_SUBSYS_QUEUE, | |
839 | .cb_count = NFQNL_MSG_MAX, | |
7af4cc3f HW |
840 | .cb = nfqnl_cb, |
841 | }; | |
842 | ||
838ab636 HW |
843 | #ifdef CONFIG_PROC_FS |
844 | struct iter_state { | |
845 | unsigned int bucket; | |
846 | }; | |
847 | ||
848 | static struct hlist_node *get_first(struct seq_file *seq) | |
849 | { | |
850 | struct iter_state *st = seq->private; | |
851 | ||
852 | if (!st) | |
853 | return NULL; | |
854 | ||
855 | for (st->bucket = 0; st->bucket < INSTANCE_BUCKETS; st->bucket++) { | |
856 | if (!hlist_empty(&instance_table[st->bucket])) | |
857 | return instance_table[st->bucket].first; | |
858 | } | |
859 | return NULL; | |
860 | } | |
861 | ||
862 | static struct hlist_node *get_next(struct seq_file *seq, struct hlist_node *h) | |
863 | { | |
864 | struct iter_state *st = seq->private; | |
865 | ||
866 | h = h->next; | |
867 | while (!h) { | |
868 | if (++st->bucket >= INSTANCE_BUCKETS) | |
869 | return NULL; | |
870 | ||
871 | h = instance_table[st->bucket].first; | |
872 | } | |
873 | return h; | |
874 | } | |
875 | ||
876 | static struct hlist_node *get_idx(struct seq_file *seq, loff_t pos) | |
877 | { | |
878 | struct hlist_node *head; | |
879 | head = get_first(seq); | |
880 | ||
881 | if (head) | |
882 | while (pos && (head = get_next(seq, head))) | |
883 | pos--; | |
884 | return pos ? NULL : head; | |
885 | } | |
886 | ||
887 | static void *seq_start(struct seq_file *seq, loff_t *pos) | |
888 | { | |
9872bec7 | 889 | spin_lock(&instances_lock); |
838ab636 HW |
890 | return get_idx(seq, *pos); |
891 | } | |
892 | ||
893 | static void *seq_next(struct seq_file *s, void *v, loff_t *pos) | |
894 | { | |
895 | (*pos)++; | |
896 | return get_next(s, v); | |
897 | } | |
898 | ||
899 | static void seq_stop(struct seq_file *s, void *v) | |
900 | { | |
9872bec7 | 901 | spin_unlock(&instances_lock); |
838ab636 HW |
902 | } |
903 | ||
904 | static int seq_show(struct seq_file *s, void *v) | |
905 | { | |
906 | const struct nfqnl_instance *inst = v; | |
907 | ||
908 | return seq_printf(s, "%5d %6d %5d %1d %5d %5d %5d %8d %2d\n", | |
909 | inst->queue_num, | |
910 | inst->peer_pid, inst->queue_total, | |
911 | inst->copy_mode, inst->copy_range, | |
912 | inst->queue_dropped, inst->queue_user_dropped, | |
9872bec7 | 913 | inst->id_sequence, 1); |
838ab636 HW |
914 | } |
915 | ||
56b3d975 | 916 | static const struct seq_operations nfqnl_seq_ops = { |
838ab636 HW |
917 | .start = seq_start, |
918 | .next = seq_next, | |
919 | .stop = seq_stop, | |
920 | .show = seq_show, | |
921 | }; | |
922 | ||
923 | static int nfqnl_open(struct inode *inode, struct file *file) | |
924 | { | |
e2da5913 PE |
925 | return seq_open_private(file, &nfqnl_seq_ops, |
926 | sizeof(struct iter_state)); | |
838ab636 HW |
927 | } |
928 | ||
da7071d7 | 929 | static const struct file_operations nfqnl_file_ops = { |
838ab636 HW |
930 | .owner = THIS_MODULE, |
931 | .open = nfqnl_open, | |
932 | .read = seq_read, | |
933 | .llseek = seq_lseek, | |
934 | .release = seq_release_private, | |
935 | }; | |
936 | ||
937 | #endif /* PROC_FS */ | |
938 | ||
32292a7f | 939 | static int __init nfnetlink_queue_init(void) |
7af4cc3f | 940 | { |
838ab636 HW |
941 | int i, status = -ENOMEM; |
942 | #ifdef CONFIG_PROC_FS | |
943 | struct proc_dir_entry *proc_nfqueue; | |
944 | #endif | |
601e68e1 | 945 | |
838ab636 HW |
946 | for (i = 0; i < INSTANCE_BUCKETS; i++) |
947 | INIT_HLIST_HEAD(&instance_table[i]); | |
948 | ||
7af4cc3f HW |
949 | netlink_register_notifier(&nfqnl_rtnl_notifier); |
950 | status = nfnetlink_subsys_register(&nfqnl_subsys); | |
951 | if (status < 0) { | |
952 | printk(KERN_ERR "nf_queue: failed to create netlink socket\n"); | |
953 | goto cleanup_netlink_notifier; | |
954 | } | |
955 | ||
838ab636 HW |
956 | #ifdef CONFIG_PROC_FS |
957 | proc_nfqueue = create_proc_entry("nfnetlink_queue", 0440, | |
958 | proc_net_netfilter); | |
959 | if (!proc_nfqueue) | |
960 | goto cleanup_subsys; | |
961 | proc_nfqueue->proc_fops = &nfqnl_file_ops; | |
962 | #endif | |
963 | ||
7af4cc3f HW |
964 | register_netdevice_notifier(&nfqnl_dev_notifier); |
965 | return status; | |
966 | ||
838ab636 HW |
967 | #ifdef CONFIG_PROC_FS |
968 | cleanup_subsys: | |
7af4cc3f | 969 | nfnetlink_subsys_unregister(&nfqnl_subsys); |
32292a7f | 970 | #endif |
7af4cc3f HW |
971 | cleanup_netlink_notifier: |
972 | netlink_unregister_notifier(&nfqnl_rtnl_notifier); | |
973 | return status; | |
974 | } | |
975 | ||
65b4b4e8 | 976 | static void __exit nfnetlink_queue_fini(void) |
7af4cc3f | 977 | { |
32292a7f PM |
978 | nf_unregister_queue_handlers(&nfqh); |
979 | unregister_netdevice_notifier(&nfqnl_dev_notifier); | |
980 | #ifdef CONFIG_PROC_FS | |
981 | remove_proc_entry("nfnetlink_queue", proc_net_netfilter); | |
982 | #endif | |
983 | nfnetlink_subsys_unregister(&nfqnl_subsys); | |
984 | netlink_unregister_notifier(&nfqnl_rtnl_notifier); | |
7af4cc3f HW |
985 | } |
986 | ||
987 | MODULE_DESCRIPTION("netfilter packet queue handler"); | |
988 | MODULE_AUTHOR("Harald Welte <laforge@netfilter.org>"); | |
989 | MODULE_LICENSE("GPL"); | |
990 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_QUEUE); | |
991 | ||
65b4b4e8 AM |
992 | module_init(nfnetlink_queue_init); |
993 | module_exit(nfnetlink_queue_fini); |