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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 | ||
59 | atomic_t id_sequence; /* 'sequence' of pkt ids */ | |
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; | |
142 | atomic_set(&inst->id_sequence, 0); | |
838ab636 HW |
143 | /* needs to be two, since we _put() after creation */ |
144 | atomic_set(&inst->use, 2); | |
181a46a5 | 145 | spin_lock_init(&inst->lock); |
7af4cc3f HW |
146 | INIT_LIST_HEAD(&inst->queue_list); |
147 | ||
148 | if (!try_module_get(THIS_MODULE)) | |
149 | goto out_free; | |
150 | ||
601e68e1 | 151 | hlist_add_head(&inst->hlist, |
7af4cc3f HW |
152 | &instance_table[instance_hashfn(queue_num)]); |
153 | ||
154 | write_unlock_bh(&instances_lock); | |
155 | ||
156 | QDEBUG("successfully created new instance\n"); | |
157 | ||
158 | return inst; | |
159 | ||
160 | out_free: | |
161 | kfree(inst); | |
162 | out_unlock: | |
163 | write_unlock_bh(&instances_lock); | |
164 | return NULL; | |
165 | } | |
166 | ||
b43d8d85 PM |
167 | static void nfqnl_flush(struct nfqnl_instance *queue, nfqnl_cmpfn cmpfn, |
168 | unsigned long data); | |
7af4cc3f HW |
169 | |
170 | static void | |
171 | _instance_destroy2(struct nfqnl_instance *inst, int lock) | |
172 | { | |
173 | /* first pull it out of the global list */ | |
174 | if (lock) | |
175 | write_lock_bh(&instances_lock); | |
176 | ||
177 | QDEBUG("removing instance %p (queuenum=%u) from hash\n", | |
178 | inst, inst->queue_num); | |
179 | hlist_del(&inst->hlist); | |
180 | ||
181 | if (lock) | |
182 | write_unlock_bh(&instances_lock); | |
183 | ||
184 | /* then flush all pending skbs from the queue */ | |
b43d8d85 | 185 | nfqnl_flush(inst, NULL, 0); |
7af4cc3f | 186 | |
838ab636 HW |
187 | /* and finally put the refcount */ |
188 | instance_put(inst); | |
7af4cc3f HW |
189 | |
190 | module_put(THIS_MODULE); | |
191 | } | |
192 | ||
193 | static inline void | |
194 | __instance_destroy(struct nfqnl_instance *inst) | |
195 | { | |
196 | _instance_destroy2(inst, 0); | |
197 | } | |
198 | ||
199 | static inline void | |
200 | instance_destroy(struct nfqnl_instance *inst) | |
201 | { | |
202 | _instance_destroy2(inst, 1); | |
203 | } | |
204 | ||
205 | ||
206 | ||
207 | static void | |
02f014d8 | 208 | issue_verdict(struct nf_queue_entry *entry, int verdict) |
7af4cc3f HW |
209 | { |
210 | QDEBUG("entering for entry %p, verdict %u\n", entry, verdict); | |
211 | ||
212 | /* TCP input path (and probably other bits) assume to be called | |
213 | * from softirq context, not from syscall, like issue_verdict is | |
214 | * called. TCP input path deadlocks with locks taken from timer | |
215 | * softirq, e.g. We therefore emulate this by local_bh_disable() */ | |
216 | ||
217 | local_bh_disable(); | |
02f014d8 | 218 | nf_reinject(entry, verdict); |
7af4cc3f | 219 | local_bh_enable(); |
7af4cc3f HW |
220 | } |
221 | ||
222 | static inline void | |
02f014d8 | 223 | __enqueue_entry(struct nfqnl_instance *queue, struct nf_queue_entry *entry) |
7af4cc3f | 224 | { |
0ac41e81 | 225 | list_add_tail(&entry->list, &queue->queue_list); |
7af4cc3f HW |
226 | queue->queue_total++; |
227 | } | |
228 | ||
7af4cc3f HW |
229 | static inline int |
230 | __nfqnl_set_mode(struct nfqnl_instance *queue, | |
231 | unsigned char mode, unsigned int range) | |
232 | { | |
233 | int status = 0; | |
601e68e1 | 234 | |
7af4cc3f HW |
235 | switch (mode) { |
236 | case NFQNL_COPY_NONE: | |
237 | case NFQNL_COPY_META: | |
238 | queue->copy_mode = mode; | |
239 | queue->copy_range = 0; | |
240 | break; | |
601e68e1 | 241 | |
7af4cc3f HW |
242 | case NFQNL_COPY_PACKET: |
243 | queue->copy_mode = mode; | |
df6fb868 | 244 | /* we're using struct nlattr which has 16bit nla_len */ |
7af4cc3f HW |
245 | if (range > 0xffff) |
246 | queue->copy_range = 0xffff; | |
247 | else | |
248 | queue->copy_range = range; | |
249 | break; | |
601e68e1 | 250 | |
7af4cc3f HW |
251 | default: |
252 | status = -EINVAL; | |
253 | ||
254 | } | |
255 | return status; | |
256 | } | |
257 | ||
02f014d8 | 258 | static struct nf_queue_entry * |
b43d8d85 | 259 | find_dequeue_entry(struct nfqnl_instance *queue, unsigned int id) |
7af4cc3f | 260 | { |
02f014d8 | 261 | struct nf_queue_entry *entry = NULL, *i; |
601e68e1 | 262 | |
7af4cc3f | 263 | spin_lock_bh(&queue->lock); |
b43d8d85 PM |
264 | |
265 | list_for_each_entry(i, &queue->queue_list, list) { | |
266 | if (i->id == id) { | |
267 | entry = i; | |
268 | break; | |
269 | } | |
270 | } | |
271 | ||
272 | if (entry) { | |
273 | list_del(&entry->list); | |
274 | queue->queue_total--; | |
275 | } | |
276 | ||
7af4cc3f HW |
277 | spin_unlock_bh(&queue->lock); |
278 | ||
279 | return entry; | |
280 | } | |
281 | ||
282 | static void | |
b43d8d85 | 283 | nfqnl_flush(struct nfqnl_instance *queue, nfqnl_cmpfn cmpfn, unsigned long data) |
7af4cc3f | 284 | { |
02f014d8 | 285 | struct nf_queue_entry *entry, *next; |
b43d8d85 | 286 | |
7af4cc3f | 287 | spin_lock_bh(&queue->lock); |
b43d8d85 PM |
288 | list_for_each_entry_safe(entry, next, &queue->queue_list, list) { |
289 | if (!cmpfn || cmpfn(entry, data)) { | |
290 | list_del(&entry->list); | |
291 | queue->queue_total--; | |
292 | issue_verdict(entry, NF_DROP); | |
293 | } | |
294 | } | |
7af4cc3f HW |
295 | spin_unlock_bh(&queue->lock); |
296 | } | |
297 | ||
298 | static struct sk_buff * | |
299 | nfqnl_build_packet_message(struct nfqnl_instance *queue, | |
02f014d8 | 300 | struct nf_queue_entry *entry, int *errp) |
7af4cc3f | 301 | { |
27a884dc | 302 | sk_buff_data_t old_tail; |
7af4cc3f HW |
303 | size_t size; |
304 | size_t data_len = 0; | |
305 | struct sk_buff *skb; | |
306 | struct nfqnl_msg_packet_hdr pmsg; | |
307 | struct nlmsghdr *nlh; | |
308 | struct nfgenmsg *nfmsg; | |
3e4ead4f JJ |
309 | struct sk_buff *entskb = entry->skb; |
310 | struct net_device *indev; | |
311 | struct net_device *outdev; | |
98a4a861 | 312 | __be32 tmp_uint; |
7af4cc3f HW |
313 | |
314 | QDEBUG("entered\n"); | |
315 | ||
df6fb868 PM |
316 | size = NLMSG_ALIGN(sizeof(struct nfgenmsg)) |
317 | + nla_total_size(sizeof(struct nfqnl_msg_packet_hdr)) | |
318 | + nla_total_size(sizeof(u_int32_t)) /* ifindex */ | |
319 | + nla_total_size(sizeof(u_int32_t)) /* ifindex */ | |
fbcd923c | 320 | #ifdef CONFIG_BRIDGE_NETFILTER |
df6fb868 PM |
321 | + nla_total_size(sizeof(u_int32_t)) /* ifindex */ |
322 | + nla_total_size(sizeof(u_int32_t)) /* ifindex */ | |
fbcd923c | 323 | #endif |
df6fb868 PM |
324 | + nla_total_size(sizeof(u_int32_t)) /* mark */ |
325 | + nla_total_size(sizeof(struct nfqnl_msg_packet_hw)) | |
326 | + nla_total_size(sizeof(struct nfqnl_msg_packet_timestamp)); | |
7af4cc3f | 327 | |
02f014d8 | 328 | outdev = entry->outdev; |
3e4ead4f | 329 | |
7af4cc3f | 330 | spin_lock_bh(&queue->lock); |
601e68e1 | 331 | |
7af4cc3f HW |
332 | switch (queue->copy_mode) { |
333 | case NFQNL_COPY_META: | |
334 | case NFQNL_COPY_NONE: | |
335 | data_len = 0; | |
336 | break; | |
601e68e1 | 337 | |
7af4cc3f | 338 | case NFQNL_COPY_PACKET: |
84fa7933 PM |
339 | if ((entskb->ip_summed == CHECKSUM_PARTIAL || |
340 | entskb->ip_summed == CHECKSUM_COMPLETE) && | |
341 | (*errp = skb_checksum_help(entskb))) { | |
e7dfb09a PM |
342 | spin_unlock_bh(&queue->lock); |
343 | return NULL; | |
344 | } | |
601e68e1 | 345 | if (queue->copy_range == 0 |
3e4ead4f JJ |
346 | || queue->copy_range > entskb->len) |
347 | data_len = entskb->len; | |
7af4cc3f HW |
348 | else |
349 | data_len = queue->copy_range; | |
601e68e1 | 350 | |
df6fb868 | 351 | size += nla_total_size(data_len); |
7af4cc3f | 352 | break; |
601e68e1 | 353 | |
7af4cc3f HW |
354 | default: |
355 | *errp = -EINVAL; | |
356 | spin_unlock_bh(&queue->lock); | |
357 | return NULL; | |
358 | } | |
359 | ||
360 | spin_unlock_bh(&queue->lock); | |
361 | ||
362 | skb = alloc_skb(size, GFP_ATOMIC); | |
363 | if (!skb) | |
364 | goto nlmsg_failure; | |
601e68e1 | 365 | |
27a884dc | 366 | old_tail = skb->tail; |
601e68e1 | 367 | nlh = NLMSG_PUT(skb, 0, 0, |
7af4cc3f HW |
368 | NFNL_SUBSYS_QUEUE << 8 | NFQNL_MSG_PACKET, |
369 | sizeof(struct nfgenmsg)); | |
370 | nfmsg = NLMSG_DATA(nlh); | |
02f014d8 | 371 | nfmsg->nfgen_family = entry->pf; |
7af4cc3f HW |
372 | nfmsg->version = NFNETLINK_V0; |
373 | nfmsg->res_id = htons(queue->queue_num); | |
374 | ||
375 | pmsg.packet_id = htonl(entry->id); | |
febf0a43 | 376 | pmsg.hw_protocol = entskb->protocol; |
02f014d8 | 377 | pmsg.hook = entry->hook; |
7af4cc3f | 378 | |
df6fb868 | 379 | NLA_PUT(skb, NFQA_PACKET_HDR, sizeof(pmsg), &pmsg); |
7af4cc3f | 380 | |
02f014d8 | 381 | indev = entry->indev; |
3e4ead4f JJ |
382 | if (indev) { |
383 | tmp_uint = htonl(indev->ifindex); | |
fbcd923c | 384 | #ifndef CONFIG_BRIDGE_NETFILTER |
df6fb868 | 385 | NLA_PUT(skb, NFQA_IFINDEX_INDEV, sizeof(tmp_uint), &tmp_uint); |
fbcd923c | 386 | #else |
02f014d8 | 387 | if (entry->pf == PF_BRIDGE) { |
fbcd923c | 388 | /* Case 1: indev is physical input device, we need to |
601e68e1 | 389 | * look for bridge group (when called from |
fbcd923c | 390 | * netfilter_bridge) */ |
df6fb868 | 391 | NLA_PUT(skb, NFQA_IFINDEX_PHYSINDEV, sizeof(tmp_uint), |
fbcd923c HW |
392 | &tmp_uint); |
393 | /* this is the bridge group "brX" */ | |
3e4ead4f | 394 | tmp_uint = htonl(indev->br_port->br->dev->ifindex); |
df6fb868 | 395 | NLA_PUT(skb, NFQA_IFINDEX_INDEV, sizeof(tmp_uint), |
fbcd923c HW |
396 | &tmp_uint); |
397 | } else { | |
398 | /* Case 2: indev is bridge group, we need to look for | |
399 | * physical device (when called from ipv4) */ | |
df6fb868 | 400 | NLA_PUT(skb, NFQA_IFINDEX_INDEV, sizeof(tmp_uint), |
fbcd923c | 401 | &tmp_uint); |
3e4ead4f JJ |
402 | if (entskb->nf_bridge |
403 | && entskb->nf_bridge->physindev) { | |
404 | tmp_uint = htonl(entskb->nf_bridge->physindev->ifindex); | |
df6fb868 | 405 | NLA_PUT(skb, NFQA_IFINDEX_PHYSINDEV, |
fbcd923c HW |
406 | sizeof(tmp_uint), &tmp_uint); |
407 | } | |
408 | } | |
409 | #endif | |
7af4cc3f HW |
410 | } |
411 | ||
3e4ead4f JJ |
412 | if (outdev) { |
413 | tmp_uint = htonl(outdev->ifindex); | |
fbcd923c | 414 | #ifndef CONFIG_BRIDGE_NETFILTER |
df6fb868 | 415 | NLA_PUT(skb, NFQA_IFINDEX_OUTDEV, sizeof(tmp_uint), &tmp_uint); |
fbcd923c | 416 | #else |
02f014d8 | 417 | if (entry->pf == PF_BRIDGE) { |
fbcd923c | 418 | /* Case 1: outdev is physical output device, we need to |
601e68e1 | 419 | * look for bridge group (when called from |
fbcd923c | 420 | * netfilter_bridge) */ |
df6fb868 | 421 | NLA_PUT(skb, NFQA_IFINDEX_PHYSOUTDEV, sizeof(tmp_uint), |
fbcd923c HW |
422 | &tmp_uint); |
423 | /* this is the bridge group "brX" */ | |
3e4ead4f | 424 | tmp_uint = htonl(outdev->br_port->br->dev->ifindex); |
df6fb868 | 425 | NLA_PUT(skb, NFQA_IFINDEX_OUTDEV, sizeof(tmp_uint), |
fbcd923c HW |
426 | &tmp_uint); |
427 | } else { | |
428 | /* Case 2: outdev is bridge group, we need to look for | |
429 | * physical output device (when called from ipv4) */ | |
df6fb868 | 430 | NLA_PUT(skb, NFQA_IFINDEX_OUTDEV, sizeof(tmp_uint), |
fbcd923c | 431 | &tmp_uint); |
3e4ead4f JJ |
432 | if (entskb->nf_bridge |
433 | && entskb->nf_bridge->physoutdev) { | |
434 | tmp_uint = htonl(entskb->nf_bridge->physoutdev->ifindex); | |
df6fb868 | 435 | NLA_PUT(skb, NFQA_IFINDEX_PHYSOUTDEV, |
fbcd923c HW |
436 | sizeof(tmp_uint), &tmp_uint); |
437 | } | |
438 | } | |
439 | #endif | |
7af4cc3f HW |
440 | } |
441 | ||
82e91ffe TG |
442 | if (entskb->mark) { |
443 | tmp_uint = htonl(entskb->mark); | |
df6fb868 | 444 | NLA_PUT(skb, NFQA_MARK, sizeof(u_int32_t), &tmp_uint); |
7af4cc3f HW |
445 | } |
446 | ||
b95cce35 | 447 | if (indev && entskb->dev) { |
7af4cc3f | 448 | struct nfqnl_msg_packet_hw phw; |
b95cce35 SH |
449 | int len = dev_parse_header(entskb, phw.hw_addr); |
450 | if (len) { | |
451 | phw.hw_addrlen = htons(len); | |
df6fb868 | 452 | NLA_PUT(skb, NFQA_HWADDR, sizeof(phw), &phw); |
b95cce35 | 453 | } |
7af4cc3f HW |
454 | } |
455 | ||
b7aa0bf7 | 456 | if (entskb->tstamp.tv64) { |
7af4cc3f | 457 | struct nfqnl_msg_packet_timestamp ts; |
b7aa0bf7 ED |
458 | struct timeval tv = ktime_to_timeval(entskb->tstamp); |
459 | ts.sec = cpu_to_be64(tv.tv_sec); | |
460 | ts.usec = cpu_to_be64(tv.tv_usec); | |
7af4cc3f | 461 | |
df6fb868 | 462 | NLA_PUT(skb, NFQA_TIMESTAMP, sizeof(ts), &ts); |
7af4cc3f HW |
463 | } |
464 | ||
465 | if (data_len) { | |
df6fb868 PM |
466 | struct nlattr *nla; |
467 | int size = nla_attr_size(data_len); | |
7af4cc3f | 468 | |
df6fb868 | 469 | if (skb_tailroom(skb) < nla_total_size(data_len)) { |
7af4cc3f HW |
470 | printk(KERN_WARNING "nf_queue: no tailroom!\n"); |
471 | goto nlmsg_failure; | |
472 | } | |
473 | ||
df6fb868 PM |
474 | nla = (struct nlattr *)skb_put(skb, nla_total_size(data_len)); |
475 | nla->nla_type = NFQA_PAYLOAD; | |
476 | nla->nla_len = size; | |
7af4cc3f | 477 | |
df6fb868 | 478 | if (skb_copy_bits(entskb, 0, nla_data(nla), data_len)) |
7af4cc3f HW |
479 | BUG(); |
480 | } | |
601e68e1 | 481 | |
7af4cc3f HW |
482 | nlh->nlmsg_len = skb->tail - old_tail; |
483 | return skb; | |
484 | ||
485 | nlmsg_failure: | |
df6fb868 | 486 | nla_put_failure: |
7af4cc3f HW |
487 | if (skb) |
488 | kfree_skb(skb); | |
489 | *errp = -EINVAL; | |
490 | if (net_ratelimit()) | |
491 | printk(KERN_ERR "nf_queue: error creating packet message\n"); | |
492 | return NULL; | |
493 | } | |
494 | ||
495 | static int | |
02f014d8 | 496 | nfqnl_enqueue_packet(struct nf_queue_entry *entry, unsigned int queuenum) |
7af4cc3f HW |
497 | { |
498 | int status = -EINVAL; | |
499 | struct sk_buff *nskb; | |
500 | struct nfqnl_instance *queue; | |
7af4cc3f HW |
501 | |
502 | QDEBUG("entered\n"); | |
503 | ||
838ab636 | 504 | queue = instance_lookup_get(queuenum); |
7af4cc3f HW |
505 | if (!queue) { |
506 | QDEBUG("no queue instance matching\n"); | |
507 | return -EINVAL; | |
508 | } | |
509 | ||
510 | if (queue->copy_mode == NFQNL_COPY_NONE) { | |
511 | QDEBUG("mode COPY_NONE, aborting\n"); | |
838ab636 HW |
512 | status = -EAGAIN; |
513 | goto err_out_put; | |
7af4cc3f HW |
514 | } |
515 | ||
7af4cc3f HW |
516 | entry->id = atomic_inc_return(&queue->id_sequence); |
517 | ||
518 | nskb = nfqnl_build_packet_message(queue, entry, &status); | |
519 | if (nskb == NULL) | |
02f014d8 | 520 | goto err_out_put; |
601e68e1 | 521 | |
7af4cc3f | 522 | spin_lock_bh(&queue->lock); |
601e68e1 | 523 | |
7af4cc3f | 524 | if (!queue->peer_pid) |
601e68e1 | 525 | goto err_out_free_nskb; |
7af4cc3f HW |
526 | |
527 | if (queue->queue_total >= queue->queue_maxlen) { | |
601e68e1 | 528 | queue->queue_dropped++; |
7af4cc3f HW |
529 | status = -ENOSPC; |
530 | if (net_ratelimit()) | |
601e68e1 YH |
531 | printk(KERN_WARNING "nf_queue: full at %d entries, " |
532 | "dropping packets(s). Dropped: %d\n", | |
7af4cc3f HW |
533 | queue->queue_total, queue->queue_dropped); |
534 | goto err_out_free_nskb; | |
535 | } | |
536 | ||
537 | /* nfnetlink_unicast will either free the nskb or add it to a socket */ | |
538 | status = nfnetlink_unicast(nskb, queue->peer_pid, MSG_DONTWAIT); | |
539 | if (status < 0) { | |
601e68e1 | 540 | queue->queue_user_dropped++; |
7af4cc3f HW |
541 | goto err_out_unlock; |
542 | } | |
543 | ||
544 | __enqueue_entry(queue, entry); | |
545 | ||
546 | spin_unlock_bh(&queue->lock); | |
838ab636 | 547 | instance_put(queue); |
7af4cc3f HW |
548 | return status; |
549 | ||
550 | err_out_free_nskb: | |
601e68e1 YH |
551 | kfree_skb(nskb); |
552 | ||
7af4cc3f HW |
553 | err_out_unlock: |
554 | spin_unlock_bh(&queue->lock); | |
555 | ||
838ab636 HW |
556 | err_out_put: |
557 | instance_put(queue); | |
7af4cc3f HW |
558 | return status; |
559 | } | |
560 | ||
561 | static int | |
02f014d8 | 562 | nfqnl_mangle(void *data, int data_len, struct nf_queue_entry *e) |
7af4cc3f HW |
563 | { |
564 | int diff; | |
2ca7b0ac | 565 | int err; |
7af4cc3f HW |
566 | |
567 | diff = data_len - e->skb->len; | |
d8a585d7 PM |
568 | if (diff < 0) { |
569 | if (pskb_trim(e->skb, data_len)) | |
570 | return -ENOMEM; | |
571 | } else if (diff > 0) { | |
7af4cc3f HW |
572 | if (data_len > 0xFFFF) |
573 | return -EINVAL; | |
574 | if (diff > skb_tailroom(e->skb)) { | |
2ca7b0ac HX |
575 | err = pskb_expand_head(e->skb, 0, |
576 | diff - skb_tailroom(e->skb), | |
577 | GFP_ATOMIC); | |
578 | if (err) { | |
1158ba27 | 579 | printk(KERN_WARNING "nf_queue: OOM " |
7af4cc3f | 580 | "in mangle, dropping packet\n"); |
2ca7b0ac | 581 | return err; |
7af4cc3f | 582 | } |
7af4cc3f HW |
583 | } |
584 | skb_put(e->skb, diff); | |
585 | } | |
37d41879 | 586 | if (!skb_make_writable(e->skb, data_len)) |
7af4cc3f | 587 | return -ENOMEM; |
27d7ff46 | 588 | skb_copy_to_linear_data(e->skb, data, data_len); |
e7dfb09a | 589 | e->skb->ip_summed = CHECKSUM_NONE; |
7af4cc3f HW |
590 | return 0; |
591 | } | |
592 | ||
7af4cc3f HW |
593 | static int |
594 | nfqnl_set_mode(struct nfqnl_instance *queue, | |
595 | unsigned char mode, unsigned int range) | |
596 | { | |
597 | int status; | |
598 | ||
599 | spin_lock_bh(&queue->lock); | |
600 | status = __nfqnl_set_mode(queue, mode, range); | |
601 | spin_unlock_bh(&queue->lock); | |
602 | ||
603 | return status; | |
604 | } | |
605 | ||
606 | static int | |
02f014d8 | 607 | dev_cmp(struct nf_queue_entry *entry, unsigned long ifindex) |
7af4cc3f | 608 | { |
02f014d8 PM |
609 | if (entry->indev) |
610 | if (entry->indev->ifindex == ifindex) | |
7af4cc3f | 611 | return 1; |
02f014d8 PM |
612 | if (entry->outdev) |
613 | if (entry->outdev->ifindex == ifindex) | |
7af4cc3f | 614 | return 1; |
ef47c6a7 PM |
615 | #ifdef CONFIG_BRIDGE_NETFILTER |
616 | if (entry->skb->nf_bridge) { | |
617 | if (entry->skb->nf_bridge->physindev && | |
618 | entry->skb->nf_bridge->physindev->ifindex == ifindex) | |
619 | return 1; | |
620 | if (entry->skb->nf_bridge->physoutdev && | |
621 | entry->skb->nf_bridge->physoutdev->ifindex == ifindex) | |
622 | return 1; | |
623 | } | |
624 | #endif | |
7af4cc3f HW |
625 | return 0; |
626 | } | |
627 | ||
628 | /* drop all packets with either indev or outdev == ifindex from all queue | |
629 | * instances */ | |
630 | static void | |
631 | nfqnl_dev_drop(int ifindex) | |
632 | { | |
633 | int i; | |
601e68e1 | 634 | |
7af4cc3f HW |
635 | QDEBUG("entering for ifindex %u\n", ifindex); |
636 | ||
637 | /* this only looks like we have to hold the readlock for a way too long | |
638 | * time, issue_verdict(), nf_reinject(), ... - but we always only | |
639 | * issue NF_DROP, which is processed directly in nf_reinject() */ | |
640 | read_lock_bh(&instances_lock); | |
641 | ||
642 | for (i = 0; i < INSTANCE_BUCKETS; i++) { | |
643 | struct hlist_node *tmp; | |
644 | struct nfqnl_instance *inst; | |
645 | struct hlist_head *head = &instance_table[i]; | |
646 | ||
b43d8d85 PM |
647 | hlist_for_each_entry(inst, tmp, head, hlist) |
648 | nfqnl_flush(inst, dev_cmp, ifindex); | |
7af4cc3f HW |
649 | } |
650 | ||
651 | read_unlock_bh(&instances_lock); | |
652 | } | |
653 | ||
654 | #define RCV_SKB_FAIL(err) do { netlink_ack(skb, nlh, (err)); return; } while (0) | |
655 | ||
656 | static int | |
657 | nfqnl_rcv_dev_event(struct notifier_block *this, | |
658 | unsigned long event, void *ptr) | |
659 | { | |
660 | struct net_device *dev = ptr; | |
661 | ||
e9dc8653 EB |
662 | if (dev->nd_net != &init_net) |
663 | return NOTIFY_DONE; | |
664 | ||
7af4cc3f HW |
665 | /* Drop any packets associated with the downed device */ |
666 | if (event == NETDEV_DOWN) | |
667 | nfqnl_dev_drop(dev->ifindex); | |
668 | return NOTIFY_DONE; | |
669 | } | |
670 | ||
671 | static struct notifier_block nfqnl_dev_notifier = { | |
672 | .notifier_call = nfqnl_rcv_dev_event, | |
673 | }; | |
674 | ||
675 | static int | |
676 | nfqnl_rcv_nl_event(struct notifier_block *this, | |
677 | unsigned long event, void *ptr) | |
678 | { | |
679 | struct netlink_notify *n = ptr; | |
680 | ||
681 | if (event == NETLINK_URELEASE && | |
682 | n->protocol == NETLINK_NETFILTER && n->pid) { | |
683 | int i; | |
684 | ||
685 | /* destroy all instances for this pid */ | |
686 | write_lock_bh(&instances_lock); | |
687 | for (i = 0; i < INSTANCE_BUCKETS; i++) { | |
688 | struct hlist_node *tmp, *t2; | |
689 | struct nfqnl_instance *inst; | |
690 | struct hlist_head *head = &instance_table[i]; | |
691 | ||
692 | hlist_for_each_entry_safe(inst, tmp, t2, head, hlist) { | |
b4b51029 EB |
693 | if ((n->net == &init_net) && |
694 | (n->pid == inst->peer_pid)) | |
7af4cc3f HW |
695 | __instance_destroy(inst); |
696 | } | |
697 | } | |
698 | write_unlock_bh(&instances_lock); | |
699 | } | |
700 | return NOTIFY_DONE; | |
701 | } | |
702 | ||
703 | static struct notifier_block nfqnl_rtnl_notifier = { | |
704 | .notifier_call = nfqnl_rcv_nl_event, | |
705 | }; | |
706 | ||
5bf75853 PM |
707 | static const struct nla_policy nfqa_verdict_policy[NFQA_MAX+1] = { |
708 | [NFQA_VERDICT_HDR] = { .len = sizeof(struct nfqnl_msg_verdict_hdr) }, | |
709 | [NFQA_MARK] = { .type = NLA_U32 }, | |
710 | [NFQA_PAYLOAD] = { .type = NLA_UNSPEC }, | |
838ab636 HW |
711 | }; |
712 | ||
7af4cc3f HW |
713 | static int |
714 | nfqnl_recv_verdict(struct sock *ctnl, struct sk_buff *skb, | |
df6fb868 | 715 | struct nlmsghdr *nlh, struct nlattr *nfqa[]) |
7af4cc3f HW |
716 | { |
717 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); | |
718 | u_int16_t queue_num = ntohs(nfmsg->res_id); | |
719 | ||
720 | struct nfqnl_msg_verdict_hdr *vhdr; | |
721 | struct nfqnl_instance *queue; | |
722 | unsigned int verdict; | |
02f014d8 | 723 | struct nf_queue_entry *entry; |
838ab636 | 724 | int err; |
7af4cc3f | 725 | |
838ab636 | 726 | queue = instance_lookup_get(queue_num); |
7af4cc3f HW |
727 | if (!queue) |
728 | return -ENODEV; | |
729 | ||
838ab636 HW |
730 | if (queue->peer_pid != NETLINK_CB(skb).pid) { |
731 | err = -EPERM; | |
732 | goto err_out_put; | |
733 | } | |
7af4cc3f | 734 | |
df6fb868 | 735 | if (!nfqa[NFQA_VERDICT_HDR]) { |
838ab636 HW |
736 | err = -EINVAL; |
737 | goto err_out_put; | |
738 | } | |
7af4cc3f | 739 | |
df6fb868 | 740 | vhdr = nla_data(nfqa[NFQA_VERDICT_HDR]); |
7af4cc3f HW |
741 | verdict = ntohl(vhdr->verdict); |
742 | ||
838ab636 HW |
743 | if ((verdict & NF_VERDICT_MASK) > NF_MAX_VERDICT) { |
744 | err = -EINVAL; | |
745 | goto err_out_put; | |
746 | } | |
7af4cc3f | 747 | |
b43d8d85 | 748 | entry = find_dequeue_entry(queue, ntohl(vhdr->id)); |
838ab636 HW |
749 | if (entry == NULL) { |
750 | err = -ENOENT; | |
751 | goto err_out_put; | |
752 | } | |
7af4cc3f | 753 | |
df6fb868 PM |
754 | if (nfqa[NFQA_PAYLOAD]) { |
755 | if (nfqnl_mangle(nla_data(nfqa[NFQA_PAYLOAD]), | |
756 | nla_len(nfqa[NFQA_PAYLOAD]), entry) < 0) | |
7af4cc3f HW |
757 | verdict = NF_DROP; |
758 | } | |
759 | ||
df6fb868 | 760 | if (nfqa[NFQA_MARK]) |
82e91ffe | 761 | entry->skb->mark = ntohl(*(__be32 *) |
df6fb868 | 762 | nla_data(nfqa[NFQA_MARK])); |
601e68e1 | 763 | |
7af4cc3f | 764 | issue_verdict(entry, verdict); |
838ab636 | 765 | instance_put(queue); |
7af4cc3f | 766 | return 0; |
838ab636 HW |
767 | |
768 | err_out_put: | |
769 | instance_put(queue); | |
770 | return err; | |
7af4cc3f HW |
771 | } |
772 | ||
773 | static int | |
774 | nfqnl_recv_unsupp(struct sock *ctnl, struct sk_buff *skb, | |
df6fb868 | 775 | struct nlmsghdr *nlh, struct nlattr *nfqa[]) |
7af4cc3f HW |
776 | { |
777 | return -ENOTSUPP; | |
778 | } | |
779 | ||
5bf75853 PM |
780 | static const struct nla_policy nfqa_cfg_policy[NFQA_CFG_MAX+1] = { |
781 | [NFQA_CFG_CMD] = { .len = sizeof(struct nfqnl_msg_config_cmd) }, | |
782 | [NFQA_CFG_PARAMS] = { .len = sizeof(struct nfqnl_msg_config_params) }, | |
838ab636 HW |
783 | }; |
784 | ||
e3ac5298 | 785 | static const struct nf_queue_handler nfqh = { |
bbd86b9f HW |
786 | .name = "nf_queue", |
787 | .outfn = &nfqnl_enqueue_packet, | |
788 | }; | |
789 | ||
7af4cc3f HW |
790 | static int |
791 | nfqnl_recv_config(struct sock *ctnl, struct sk_buff *skb, | |
df6fb868 | 792 | struct nlmsghdr *nlh, struct nlattr *nfqa[]) |
7af4cc3f HW |
793 | { |
794 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); | |
795 | u_int16_t queue_num = ntohs(nfmsg->res_id); | |
796 | struct nfqnl_instance *queue; | |
838ab636 | 797 | int ret = 0; |
7af4cc3f HW |
798 | |
799 | QDEBUG("entering for msg %u\n", NFNL_MSG_TYPE(nlh->nlmsg_type)); | |
800 | ||
838ab636 | 801 | queue = instance_lookup_get(queue_num); |
df6fb868 | 802 | if (nfqa[NFQA_CFG_CMD]) { |
7af4cc3f | 803 | struct nfqnl_msg_config_cmd *cmd; |
df6fb868 | 804 | cmd = nla_data(nfqa[NFQA_CFG_CMD]); |
7af4cc3f HW |
805 | QDEBUG("found CFG_CMD\n"); |
806 | ||
807 | switch (cmd->command) { | |
808 | case NFQNL_CFG_CMD_BIND: | |
809 | if (queue) | |
810 | return -EBUSY; | |
811 | ||
812 | queue = instance_create(queue_num, NETLINK_CB(skb).pid); | |
813 | if (!queue) | |
814 | return -EINVAL; | |
815 | break; | |
816 | case NFQNL_CFG_CMD_UNBIND: | |
817 | if (!queue) | |
818 | return -ENODEV; | |
819 | ||
838ab636 HW |
820 | if (queue->peer_pid != NETLINK_CB(skb).pid) { |
821 | ret = -EPERM; | |
822 | goto out_put; | |
823 | } | |
7af4cc3f HW |
824 | |
825 | instance_destroy(queue); | |
826 | break; | |
827 | case NFQNL_CFG_CMD_PF_BIND: | |
828 | QDEBUG("registering queue handler for pf=%u\n", | |
829 | ntohs(cmd->pf)); | |
bbd86b9f | 830 | ret = nf_register_queue_handler(ntohs(cmd->pf), &nfqh); |
7af4cc3f HW |
831 | break; |
832 | case NFQNL_CFG_CMD_PF_UNBIND: | |
833 | QDEBUG("unregistering queue handler for pf=%u\n", | |
834 | ntohs(cmd->pf)); | |
ce7663d8 | 835 | ret = nf_unregister_queue_handler(ntohs(cmd->pf), &nfqh); |
7af4cc3f HW |
836 | break; |
837 | default: | |
838ab636 HW |
838 | ret = -EINVAL; |
839 | break; | |
7af4cc3f HW |
840 | } |
841 | } else { | |
842 | if (!queue) { | |
843 | QDEBUG("no config command, and no instance ENOENT\n"); | |
838ab636 HW |
844 | ret = -ENOENT; |
845 | goto out_put; | |
7af4cc3f HW |
846 | } |
847 | ||
848 | if (queue->peer_pid != NETLINK_CB(skb).pid) { | |
849 | QDEBUG("no config command, and wrong pid\n"); | |
838ab636 HW |
850 | ret = -EPERM; |
851 | goto out_put; | |
7af4cc3f HW |
852 | } |
853 | } | |
854 | ||
df6fb868 | 855 | if (nfqa[NFQA_CFG_PARAMS]) { |
7af4cc3f | 856 | struct nfqnl_msg_config_params *params; |
7af4cc3f | 857 | |
406dbfc9 PM |
858 | if (!queue) { |
859 | ret = -ENOENT; | |
860 | goto out_put; | |
861 | } | |
df6fb868 | 862 | params = nla_data(nfqa[NFQA_CFG_PARAMS]); |
7af4cc3f HW |
863 | nfqnl_set_mode(queue, params->copy_mode, |
864 | ntohl(params->copy_range)); | |
865 | } | |
866 | ||
df6fb868 | 867 | if (nfqa[NFQA_CFG_QUEUE_MAXLEN]) { |
829e17a1 | 868 | __be32 *queue_maxlen; |
df6fb868 | 869 | queue_maxlen = nla_data(nfqa[NFQA_CFG_QUEUE_MAXLEN]); |
829e17a1 EL |
870 | spin_lock_bh(&queue->lock); |
871 | queue->queue_maxlen = ntohl(*queue_maxlen); | |
872 | spin_unlock_bh(&queue->lock); | |
873 | } | |
874 | ||
838ab636 HW |
875 | out_put: |
876 | instance_put(queue); | |
877 | return ret; | |
7af4cc3f HW |
878 | } |
879 | ||
7c8d4cb4 | 880 | static const struct nfnl_callback nfqnl_cb[NFQNL_MSG_MAX] = { |
7af4cc3f | 881 | [NFQNL_MSG_PACKET] = { .call = nfqnl_recv_unsupp, |
37d2e7a2 | 882 | .attr_count = NFQA_MAX, }, |
7af4cc3f | 883 | [NFQNL_MSG_VERDICT] = { .call = nfqnl_recv_verdict, |
5bf75853 PM |
884 | .attr_count = NFQA_MAX, |
885 | .policy = nfqa_verdict_policy }, | |
7af4cc3f | 886 | [NFQNL_MSG_CONFIG] = { .call = nfqnl_recv_config, |
5bf75853 PM |
887 | .attr_count = NFQA_CFG_MAX, |
888 | .policy = nfqa_cfg_policy }, | |
7af4cc3f HW |
889 | }; |
890 | ||
7c8d4cb4 | 891 | static const struct nfnetlink_subsystem nfqnl_subsys = { |
7af4cc3f HW |
892 | .name = "nf_queue", |
893 | .subsys_id = NFNL_SUBSYS_QUEUE, | |
894 | .cb_count = NFQNL_MSG_MAX, | |
7af4cc3f HW |
895 | .cb = nfqnl_cb, |
896 | }; | |
897 | ||
838ab636 HW |
898 | #ifdef CONFIG_PROC_FS |
899 | struct iter_state { | |
900 | unsigned int bucket; | |
901 | }; | |
902 | ||
903 | static struct hlist_node *get_first(struct seq_file *seq) | |
904 | { | |
905 | struct iter_state *st = seq->private; | |
906 | ||
907 | if (!st) | |
908 | return NULL; | |
909 | ||
910 | for (st->bucket = 0; st->bucket < INSTANCE_BUCKETS; st->bucket++) { | |
911 | if (!hlist_empty(&instance_table[st->bucket])) | |
912 | return instance_table[st->bucket].first; | |
913 | } | |
914 | return NULL; | |
915 | } | |
916 | ||
917 | static struct hlist_node *get_next(struct seq_file *seq, struct hlist_node *h) | |
918 | { | |
919 | struct iter_state *st = seq->private; | |
920 | ||
921 | h = h->next; | |
922 | while (!h) { | |
923 | if (++st->bucket >= INSTANCE_BUCKETS) | |
924 | return NULL; | |
925 | ||
926 | h = instance_table[st->bucket].first; | |
927 | } | |
928 | return h; | |
929 | } | |
930 | ||
931 | static struct hlist_node *get_idx(struct seq_file *seq, loff_t pos) | |
932 | { | |
933 | struct hlist_node *head; | |
934 | head = get_first(seq); | |
935 | ||
936 | if (head) | |
937 | while (pos && (head = get_next(seq, head))) | |
938 | pos--; | |
939 | return pos ? NULL : head; | |
940 | } | |
941 | ||
942 | static void *seq_start(struct seq_file *seq, loff_t *pos) | |
943 | { | |
944 | read_lock_bh(&instances_lock); | |
945 | return get_idx(seq, *pos); | |
946 | } | |
947 | ||
948 | static void *seq_next(struct seq_file *s, void *v, loff_t *pos) | |
949 | { | |
950 | (*pos)++; | |
951 | return get_next(s, v); | |
952 | } | |
953 | ||
954 | static void seq_stop(struct seq_file *s, void *v) | |
955 | { | |
956 | read_unlock_bh(&instances_lock); | |
957 | } | |
958 | ||
959 | static int seq_show(struct seq_file *s, void *v) | |
960 | { | |
961 | const struct nfqnl_instance *inst = v; | |
962 | ||
963 | return seq_printf(s, "%5d %6d %5d %1d %5d %5d %5d %8d %2d\n", | |
964 | inst->queue_num, | |
965 | inst->peer_pid, inst->queue_total, | |
966 | inst->copy_mode, inst->copy_range, | |
967 | inst->queue_dropped, inst->queue_user_dropped, | |
968 | atomic_read(&inst->id_sequence), | |
969 | atomic_read(&inst->use)); | |
970 | } | |
971 | ||
56b3d975 | 972 | static const struct seq_operations nfqnl_seq_ops = { |
838ab636 HW |
973 | .start = seq_start, |
974 | .next = seq_next, | |
975 | .stop = seq_stop, | |
976 | .show = seq_show, | |
977 | }; | |
978 | ||
979 | static int nfqnl_open(struct inode *inode, struct file *file) | |
980 | { | |
e2da5913 PE |
981 | return seq_open_private(file, &nfqnl_seq_ops, |
982 | sizeof(struct iter_state)); | |
838ab636 HW |
983 | } |
984 | ||
da7071d7 | 985 | static const struct file_operations nfqnl_file_ops = { |
838ab636 HW |
986 | .owner = THIS_MODULE, |
987 | .open = nfqnl_open, | |
988 | .read = seq_read, | |
989 | .llseek = seq_lseek, | |
990 | .release = seq_release_private, | |
991 | }; | |
992 | ||
993 | #endif /* PROC_FS */ | |
994 | ||
32292a7f | 995 | static int __init nfnetlink_queue_init(void) |
7af4cc3f | 996 | { |
838ab636 HW |
997 | int i, status = -ENOMEM; |
998 | #ifdef CONFIG_PROC_FS | |
999 | struct proc_dir_entry *proc_nfqueue; | |
1000 | #endif | |
601e68e1 | 1001 | |
838ab636 HW |
1002 | for (i = 0; i < INSTANCE_BUCKETS; i++) |
1003 | INIT_HLIST_HEAD(&instance_table[i]); | |
1004 | ||
7af4cc3f HW |
1005 | netlink_register_notifier(&nfqnl_rtnl_notifier); |
1006 | status = nfnetlink_subsys_register(&nfqnl_subsys); | |
1007 | if (status < 0) { | |
1008 | printk(KERN_ERR "nf_queue: failed to create netlink socket\n"); | |
1009 | goto cleanup_netlink_notifier; | |
1010 | } | |
1011 | ||
838ab636 HW |
1012 | #ifdef CONFIG_PROC_FS |
1013 | proc_nfqueue = create_proc_entry("nfnetlink_queue", 0440, | |
1014 | proc_net_netfilter); | |
1015 | if (!proc_nfqueue) | |
1016 | goto cleanup_subsys; | |
1017 | proc_nfqueue->proc_fops = &nfqnl_file_ops; | |
1018 | #endif | |
1019 | ||
7af4cc3f HW |
1020 | register_netdevice_notifier(&nfqnl_dev_notifier); |
1021 | return status; | |
1022 | ||
838ab636 HW |
1023 | #ifdef CONFIG_PROC_FS |
1024 | cleanup_subsys: | |
7af4cc3f | 1025 | nfnetlink_subsys_unregister(&nfqnl_subsys); |
32292a7f | 1026 | #endif |
7af4cc3f HW |
1027 | cleanup_netlink_notifier: |
1028 | netlink_unregister_notifier(&nfqnl_rtnl_notifier); | |
1029 | return status; | |
1030 | } | |
1031 | ||
65b4b4e8 | 1032 | static void __exit nfnetlink_queue_fini(void) |
7af4cc3f | 1033 | { |
32292a7f PM |
1034 | nf_unregister_queue_handlers(&nfqh); |
1035 | unregister_netdevice_notifier(&nfqnl_dev_notifier); | |
1036 | #ifdef CONFIG_PROC_FS | |
1037 | remove_proc_entry("nfnetlink_queue", proc_net_netfilter); | |
1038 | #endif | |
1039 | nfnetlink_subsys_unregister(&nfqnl_subsys); | |
1040 | netlink_unregister_notifier(&nfqnl_rtnl_notifier); | |
7af4cc3f HW |
1041 | } |
1042 | ||
1043 | MODULE_DESCRIPTION("netfilter packet queue handler"); | |
1044 | MODULE_AUTHOR("Harald Welte <laforge@netfilter.org>"); | |
1045 | MODULE_LICENSE("GPL"); | |
1046 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_QUEUE); | |
1047 | ||
65b4b4e8 AM |
1048 | module_init(nfnetlink_queue_init); |
1049 | module_exit(nfnetlink_queue_fini); |