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Commit | Line | Data |
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0597f268 HW |
1 | /* |
2 | * This is a module which is used for logging packets to userspace via | |
3 | * nfetlink. | |
4 | * | |
5 | * (C) 2005 by Harald Welte <laforge@netfilter.org> | |
6 | * | |
7 | * Based on the old ipv4-only ipt_ULOG.c: | |
8 | * (C) 2000-2004 by Harald Welte <laforge@netfilter.org> | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License version 2 as | |
12 | * published by the Free Software Foundation. | |
0597f268 HW |
13 | */ |
14 | #include <linux/module.h> | |
15 | #include <linux/skbuff.h> | |
16 | #include <linux/init.h> | |
17 | #include <linux/ip.h> | |
18 | #include <linux/ipv6.h> | |
19 | #include <linux/netdevice.h> | |
20 | #include <linux/netfilter.h> | |
21 | #include <linux/netlink.h> | |
22 | #include <linux/netfilter/nfnetlink.h> | |
23 | #include <linux/netfilter/nfnetlink_log.h> | |
24 | #include <linux/spinlock.h> | |
25 | #include <linux/sysctl.h> | |
26 | #include <linux/proc_fs.h> | |
27 | #include <linux/security.h> | |
28 | #include <linux/list.h> | |
29 | #include <linux/jhash.h> | |
30 | #include <linux/random.h> | |
31 | #include <net/sock.h> | |
f01ffbd6 | 32 | #include <net/netfilter/nf_log.h> |
0597f268 HW |
33 | |
34 | #include <asm/atomic.h> | |
35 | ||
fbcd923c HW |
36 | #ifdef CONFIG_BRIDGE_NETFILTER |
37 | #include "../bridge/br_private.h" | |
38 | #endif | |
39 | ||
c2db2924 | 40 | #define NFULNL_NLBUFSIZ_DEFAULT NLMSG_GOODSIZE |
6b6ec99a | 41 | #define NFULNL_TIMEOUT_DEFAULT HZ /* every second */ |
0597f268 | 42 | #define NFULNL_QTHRESH_DEFAULT 100 /* 100 packets */ |
6b6ec99a | 43 | #define NFULNL_COPY_RANGE_MAX 0xFFFF /* max packet size is limited by 16-bit struct nfattr nfa_len field */ |
0597f268 HW |
44 | |
45 | #define PRINTR(x, args...) do { if (net_ratelimit()) \ | |
46 | printk(x, ## args); } while (0); | |
47 | ||
48 | #if 0 | |
49 | #define UDEBUG(x, args ...) printk(KERN_DEBUG "%s(%d):%s(): " x, \ | |
50 | __FILE__, __LINE__, __FUNCTION__, \ | |
51 | ## args) | |
52 | #else | |
53 | #define UDEBUG(x, ...) | |
54 | #endif | |
55 | ||
56 | struct nfulnl_instance { | |
57 | struct hlist_node hlist; /* global list of instances */ | |
58 | spinlock_t lock; | |
59 | atomic_t use; /* use count */ | |
60 | ||
61 | unsigned int qlen; /* number of nlmsgs in skb */ | |
62 | struct sk_buff *skb; /* pre-allocatd skb */ | |
0597f268 HW |
63 | struct timer_list timer; |
64 | int peer_pid; /* PID of the peer process */ | |
65 | ||
66 | /* configurable parameters */ | |
67 | unsigned int flushtimeout; /* timeout until queue flush */ | |
68 | unsigned int nlbufsiz; /* netlink buffer allocation size */ | |
69 | unsigned int qthreshold; /* threshold of the queue */ | |
70 | u_int32_t copy_range; | |
0af5f6c1 | 71 | u_int32_t seq; /* instance-local sequential counter */ |
0597f268 | 72 | u_int16_t group_num; /* number of this queue */ |
0af5f6c1 | 73 | u_int16_t flags; |
601e68e1 | 74 | u_int8_t copy_mode; |
0597f268 HW |
75 | }; |
76 | ||
77 | static DEFINE_RWLOCK(instances_lock); | |
0af5f6c1 | 78 | static atomic_t global_seq; |
0597f268 HW |
79 | |
80 | #define INSTANCE_BUCKETS 16 | |
81 | static struct hlist_head instance_table[INSTANCE_BUCKETS]; | |
82 | static unsigned int hash_init; | |
83 | ||
84 | static inline u_int8_t instance_hashfn(u_int16_t group_num) | |
85 | { | |
86 | return ((group_num & 0xff) % INSTANCE_BUCKETS); | |
87 | } | |
88 | ||
89 | static struct nfulnl_instance * | |
90 | __instance_lookup(u_int16_t group_num) | |
91 | { | |
92 | struct hlist_head *head; | |
93 | struct hlist_node *pos; | |
94 | struct nfulnl_instance *inst; | |
95 | ||
96 | UDEBUG("entering (group_num=%u)\n", group_num); | |
97 | ||
98 | head = &instance_table[instance_hashfn(group_num)]; | |
99 | hlist_for_each_entry(inst, pos, head, hlist) { | |
100 | if (inst->group_num == group_num) | |
101 | return inst; | |
102 | } | |
103 | return NULL; | |
104 | } | |
105 | ||
106 | static inline void | |
107 | instance_get(struct nfulnl_instance *inst) | |
108 | { | |
109 | atomic_inc(&inst->use); | |
110 | } | |
111 | ||
112 | static struct nfulnl_instance * | |
113 | instance_lookup_get(u_int16_t group_num) | |
114 | { | |
115 | struct nfulnl_instance *inst; | |
116 | ||
117 | read_lock_bh(&instances_lock); | |
118 | inst = __instance_lookup(group_num); | |
119 | if (inst) | |
120 | instance_get(inst); | |
121 | read_unlock_bh(&instances_lock); | |
122 | ||
123 | return inst; | |
124 | } | |
125 | ||
126 | static void | |
127 | instance_put(struct nfulnl_instance *inst) | |
128 | { | |
129 | if (inst && atomic_dec_and_test(&inst->use)) { | |
130 | UDEBUG("kfree(inst=%p)\n", inst); | |
131 | kfree(inst); | |
7d90e86d | 132 | module_put(THIS_MODULE); |
0597f268 HW |
133 | } |
134 | } | |
135 | ||
136 | static void nfulnl_timer(unsigned long data); | |
137 | ||
138 | static struct nfulnl_instance * | |
139 | instance_create(u_int16_t group_num, int pid) | |
140 | { | |
141 | struct nfulnl_instance *inst; | |
142 | ||
143 | UDEBUG("entering (group_num=%u, pid=%d)\n", group_num, | |
144 | pid); | |
145 | ||
601e68e1 | 146 | write_lock_bh(&instances_lock); |
0597f268 HW |
147 | if (__instance_lookup(group_num)) { |
148 | inst = NULL; | |
149 | UDEBUG("aborting, instance already exists\n"); | |
150 | goto out_unlock; | |
151 | } | |
152 | ||
10dfdc69 | 153 | inst = kzalloc(sizeof(*inst), GFP_ATOMIC); |
0597f268 HW |
154 | if (!inst) |
155 | goto out_unlock; | |
156 | ||
aace57e0 MM |
157 | if (!try_module_get(THIS_MODULE)) { |
158 | kfree(inst); | |
159 | goto out_unlock; | |
160 | } | |
161 | ||
0597f268 | 162 | INIT_HLIST_NODE(&inst->hlist); |
181a46a5 | 163 | spin_lock_init(&inst->lock); |
0597f268 HW |
164 | /* needs to be two, since we _put() after creation */ |
165 | atomic_set(&inst->use, 2); | |
166 | ||
e6f689db | 167 | setup_timer(&inst->timer, nfulnl_timer, (unsigned long)inst); |
0597f268 HW |
168 | |
169 | inst->peer_pid = pid; | |
170 | inst->group_num = group_num; | |
171 | ||
172 | inst->qthreshold = NFULNL_QTHRESH_DEFAULT; | |
173 | inst->flushtimeout = NFULNL_TIMEOUT_DEFAULT; | |
174 | inst->nlbufsiz = NFULNL_NLBUFSIZ_DEFAULT; | |
175 | inst->copy_mode = NFULNL_COPY_PACKET; | |
6b6ec99a | 176 | inst->copy_range = NFULNL_COPY_RANGE_MAX; |
0597f268 | 177 | |
601e68e1 | 178 | hlist_add_head(&inst->hlist, |
0597f268 HW |
179 | &instance_table[instance_hashfn(group_num)]); |
180 | ||
601e68e1 | 181 | UDEBUG("newly added node: %p, next=%p\n", &inst->hlist, |
0597f268 HW |
182 | inst->hlist.next); |
183 | ||
184 | write_unlock_bh(&instances_lock); | |
185 | ||
186 | return inst; | |
187 | ||
0597f268 HW |
188 | out_unlock: |
189 | write_unlock_bh(&instances_lock); | |
190 | return NULL; | |
191 | } | |
192 | ||
e3567061 | 193 | static void __nfulnl_flush(struct nfulnl_instance *inst); |
0597f268 HW |
194 | |
195 | static void | |
9afdb00c | 196 | __instance_destroy(struct nfulnl_instance *inst) |
0597f268 HW |
197 | { |
198 | /* first pull it out of the global list */ | |
0597f268 HW |
199 | UDEBUG("removing instance %p (queuenum=%u) from hash\n", |
200 | inst, inst->group_num); | |
201 | ||
202 | hlist_del(&inst->hlist); | |
203 | ||
0597f268 HW |
204 | /* then flush all pending packets from skb */ |
205 | ||
206 | spin_lock_bh(&inst->lock); | |
e3567061 MM |
207 | if (inst->skb) |
208 | __nfulnl_flush(inst); | |
0597f268 HW |
209 | spin_unlock_bh(&inst->lock); |
210 | ||
211 | /* and finally put the refcount */ | |
212 | instance_put(inst); | |
0597f268 HW |
213 | } |
214 | ||
0597f268 HW |
215 | static inline void |
216 | instance_destroy(struct nfulnl_instance *inst) | |
217 | { | |
9afdb00c PM |
218 | write_lock_bh(&instances_lock); |
219 | __instance_destroy(inst); | |
220 | write_unlock_bh(&instances_lock); | |
0597f268 HW |
221 | } |
222 | ||
223 | static int | |
224 | nfulnl_set_mode(struct nfulnl_instance *inst, u_int8_t mode, | |
225 | unsigned int range) | |
226 | { | |
227 | int status = 0; | |
228 | ||
229 | spin_lock_bh(&inst->lock); | |
601e68e1 | 230 | |
0597f268 HW |
231 | switch (mode) { |
232 | case NFULNL_COPY_NONE: | |
233 | case NFULNL_COPY_META: | |
234 | inst->copy_mode = mode; | |
235 | inst->copy_range = 0; | |
236 | break; | |
601e68e1 | 237 | |
0597f268 HW |
238 | case NFULNL_COPY_PACKET: |
239 | inst->copy_mode = mode; | |
6b6ec99a MM |
240 | inst->copy_range = min_t(unsigned int, |
241 | range, NFULNL_COPY_RANGE_MAX); | |
0597f268 | 242 | break; |
601e68e1 | 243 | |
0597f268 HW |
244 | default: |
245 | status = -EINVAL; | |
246 | break; | |
247 | } | |
248 | ||
249 | spin_unlock_bh(&inst->lock); | |
250 | ||
251 | return status; | |
252 | } | |
253 | ||
254 | static int | |
255 | nfulnl_set_nlbufsiz(struct nfulnl_instance *inst, u_int32_t nlbufsiz) | |
256 | { | |
257 | int status; | |
258 | ||
259 | spin_lock_bh(&inst->lock); | |
260 | if (nlbufsiz < NFULNL_NLBUFSIZ_DEFAULT) | |
261 | status = -ERANGE; | |
262 | else if (nlbufsiz > 131072) | |
263 | status = -ERANGE; | |
264 | else { | |
265 | inst->nlbufsiz = nlbufsiz; | |
266 | status = 0; | |
267 | } | |
268 | spin_unlock_bh(&inst->lock); | |
269 | ||
270 | return status; | |
271 | } | |
272 | ||
273 | static int | |
274 | nfulnl_set_timeout(struct nfulnl_instance *inst, u_int32_t timeout) | |
275 | { | |
276 | spin_lock_bh(&inst->lock); | |
277 | inst->flushtimeout = timeout; | |
278 | spin_unlock_bh(&inst->lock); | |
279 | ||
280 | return 0; | |
281 | } | |
282 | ||
283 | static int | |
284 | nfulnl_set_qthresh(struct nfulnl_instance *inst, u_int32_t qthresh) | |
285 | { | |
286 | spin_lock_bh(&inst->lock); | |
287 | inst->qthreshold = qthresh; | |
288 | spin_unlock_bh(&inst->lock); | |
289 | ||
290 | return 0; | |
291 | } | |
292 | ||
0af5f6c1 HW |
293 | static int |
294 | nfulnl_set_flags(struct nfulnl_instance *inst, u_int16_t flags) | |
295 | { | |
296 | spin_lock_bh(&inst->lock); | |
ee433530 | 297 | inst->flags = flags; |
0af5f6c1 HW |
298 | spin_unlock_bh(&inst->lock); |
299 | ||
300 | return 0; | |
301 | } | |
302 | ||
c6a8f648 MM |
303 | static struct sk_buff * |
304 | nfulnl_alloc_skb(unsigned int inst_size, unsigned int pkt_size) | |
0597f268 HW |
305 | { |
306 | struct sk_buff *skb; | |
ad2ad0f9 | 307 | unsigned int n; |
0597f268 HW |
308 | |
309 | UDEBUG("entered (%u, %u)\n", inst_size, pkt_size); | |
310 | ||
311 | /* alloc skb which should be big enough for a whole multipart | |
312 | * message. WARNING: has to be <= 128k due to slab restrictions */ | |
313 | ||
ad2ad0f9 PM |
314 | n = max(inst_size, pkt_size); |
315 | skb = alloc_skb(n, GFP_ATOMIC); | |
0597f268 HW |
316 | if (!skb) { |
317 | PRINTR("nfnetlink_log: can't alloc whole buffer (%u bytes)\n", | |
318 | inst_size); | |
319 | ||
ad2ad0f9 PM |
320 | if (n > pkt_size) { |
321 | /* try to allocate only as much as we need for current | |
322 | * packet */ | |
0597f268 | 323 | |
ad2ad0f9 PM |
324 | skb = alloc_skb(pkt_size, GFP_ATOMIC); |
325 | if (!skb) | |
326 | PRINTR("nfnetlink_log: can't even alloc %u " | |
327 | "bytes\n", pkt_size); | |
328 | } | |
0597f268 HW |
329 | } |
330 | ||
331 | return skb; | |
332 | } | |
333 | ||
334 | static int | |
335 | __nfulnl_send(struct nfulnl_instance *inst) | |
336 | { | |
29c5d4af | 337 | int status = -1; |
0597f268 | 338 | |
0597f268 | 339 | if (inst->qlen > 1) |
29c5d4af EL |
340 | NLMSG_PUT(inst->skb, 0, 0, |
341 | NLMSG_DONE, | |
342 | sizeof(struct nfgenmsg)); | |
0597f268 HW |
343 | |
344 | status = nfnetlink_unicast(inst->skb, inst->peer_pid, MSG_DONTWAIT); | |
345 | if (status < 0) { | |
346 | UDEBUG("netlink_unicast() failed\n"); | |
347 | /* FIXME: statistics */ | |
348 | } | |
349 | ||
350 | inst->qlen = 0; | |
351 | inst->skb = NULL; | |
0597f268 | 352 | |
29c5d4af | 353 | nlmsg_failure: |
0597f268 HW |
354 | return status; |
355 | } | |
356 | ||
e3567061 MM |
357 | static void |
358 | __nfulnl_flush(struct nfulnl_instance *inst) | |
359 | { | |
360 | /* timer holds a reference */ | |
361 | if (del_timer(&inst->timer)) | |
362 | instance_put(inst); | |
363 | if (inst->skb) | |
364 | __nfulnl_send(inst); | |
365 | } | |
366 | ||
c6a8f648 MM |
367 | static void |
368 | nfulnl_timer(unsigned long data) | |
0597f268 | 369 | { |
601e68e1 | 370 | struct nfulnl_instance *inst = (struct nfulnl_instance *)data; |
0597f268 HW |
371 | |
372 | UDEBUG("timer function called, flushing buffer\n"); | |
373 | ||
374 | spin_lock_bh(&inst->lock); | |
370e6a87 MM |
375 | if (inst->skb) |
376 | __nfulnl_send(inst); | |
0597f268 | 377 | spin_unlock_bh(&inst->lock); |
05f7b7b3 | 378 | instance_put(inst); |
0597f268 HW |
379 | } |
380 | ||
0af5f6c1 HW |
381 | /* This is an inline function, we don't really care about a long |
382 | * list of arguments */ | |
601e68e1 | 383 | static inline int |
0597f268 | 384 | __build_packet_message(struct nfulnl_instance *inst, |
601e68e1 | 385 | const struct sk_buff *skb, |
0597f268 HW |
386 | unsigned int data_len, |
387 | unsigned int pf, | |
388 | unsigned int hooknum, | |
389 | const struct net_device *indev, | |
390 | const struct net_device *outdev, | |
391 | const struct nf_loginfo *li, | |
d7a5c324 | 392 | const char *prefix, unsigned int plen) |
0597f268 | 393 | { |
0597f268 HW |
394 | struct nfulnl_msg_packet_hdr pmsg; |
395 | struct nlmsghdr *nlh; | |
396 | struct nfgenmsg *nfmsg; | |
98a4a861 | 397 | __be32 tmp_uint; |
27a884dc | 398 | sk_buff_data_t old_tail = inst->skb->tail; |
0597f268 HW |
399 | |
400 | UDEBUG("entered\n"); | |
601e68e1 | 401 | |
601e68e1 | 402 | nlh = NLMSG_PUT(inst->skb, 0, 0, |
0597f268 HW |
403 | NFNL_SUBSYS_ULOG << 8 | NFULNL_MSG_PACKET, |
404 | sizeof(struct nfgenmsg)); | |
405 | nfmsg = NLMSG_DATA(nlh); | |
406 | nfmsg->nfgen_family = pf; | |
407 | nfmsg->version = NFNETLINK_V0; | |
408 | nfmsg->res_id = htons(inst->group_num); | |
409 | ||
febf0a43 | 410 | pmsg.hw_protocol = skb->protocol; |
0597f268 HW |
411 | pmsg.hook = hooknum; |
412 | ||
df6fb868 | 413 | NLA_PUT(inst->skb, NFULA_PACKET_HDR, sizeof(pmsg), &pmsg); |
0597f268 | 414 | |
d7a5c324 | 415 | if (prefix) |
df6fb868 | 416 | NLA_PUT(inst->skb, NFULA_PREFIX, plen, prefix); |
0597f268 HW |
417 | |
418 | if (indev) { | |
419 | tmp_uint = htonl(indev->ifindex); | |
fbcd923c | 420 | #ifndef CONFIG_BRIDGE_NETFILTER |
df6fb868 | 421 | NLA_PUT(inst->skb, NFULA_IFINDEX_INDEV, sizeof(tmp_uint), |
0597f268 | 422 | &tmp_uint); |
fbcd923c HW |
423 | #else |
424 | if (pf == PF_BRIDGE) { | |
425 | /* Case 1: outdev is physical input device, we need to | |
426 | * look for bridge group (when called from | |
427 | * netfilter_bridge) */ | |
df6fb868 | 428 | NLA_PUT(inst->skb, NFULA_IFINDEX_PHYSINDEV, |
fbcd923c HW |
429 | sizeof(tmp_uint), &tmp_uint); |
430 | /* this is the bridge group "brX" */ | |
431 | tmp_uint = htonl(indev->br_port->br->dev->ifindex); | |
df6fb868 | 432 | NLA_PUT(inst->skb, NFULA_IFINDEX_INDEV, |
fbcd923c HW |
433 | sizeof(tmp_uint), &tmp_uint); |
434 | } else { | |
435 | /* Case 2: indev is bridge group, we need to look for | |
436 | * physical device (when called from ipv4) */ | |
df6fb868 | 437 | NLA_PUT(inst->skb, NFULA_IFINDEX_INDEV, |
fbcd923c HW |
438 | sizeof(tmp_uint), &tmp_uint); |
439 | if (skb->nf_bridge && skb->nf_bridge->physindev) { | |
601e68e1 | 440 | tmp_uint = |
fbcd923c | 441 | htonl(skb->nf_bridge->physindev->ifindex); |
df6fb868 | 442 | NLA_PUT(inst->skb, NFULA_IFINDEX_PHYSINDEV, |
fbcd923c HW |
443 | sizeof(tmp_uint), &tmp_uint); |
444 | } | |
445 | } | |
446 | #endif | |
0597f268 HW |
447 | } |
448 | ||
449 | if (outdev) { | |
450 | tmp_uint = htonl(outdev->ifindex); | |
fbcd923c | 451 | #ifndef CONFIG_BRIDGE_NETFILTER |
df6fb868 | 452 | NLA_PUT(inst->skb, NFULA_IFINDEX_OUTDEV, sizeof(tmp_uint), |
0597f268 | 453 | &tmp_uint); |
fbcd923c HW |
454 | #else |
455 | if (pf == PF_BRIDGE) { | |
456 | /* Case 1: outdev is physical output device, we need to | |
457 | * look for bridge group (when called from | |
458 | * netfilter_bridge) */ | |
df6fb868 | 459 | NLA_PUT(inst->skb, NFULA_IFINDEX_PHYSOUTDEV, |
fbcd923c HW |
460 | sizeof(tmp_uint), &tmp_uint); |
461 | /* this is the bridge group "brX" */ | |
462 | tmp_uint = htonl(outdev->br_port->br->dev->ifindex); | |
df6fb868 | 463 | NLA_PUT(inst->skb, NFULA_IFINDEX_OUTDEV, |
fbcd923c HW |
464 | sizeof(tmp_uint), &tmp_uint); |
465 | } else { | |
466 | /* Case 2: indev is a bridge group, we need to look | |
467 | * for physical device (when called from ipv4) */ | |
df6fb868 | 468 | NLA_PUT(inst->skb, NFULA_IFINDEX_OUTDEV, |
fbcd923c | 469 | sizeof(tmp_uint), &tmp_uint); |
ba5dcee1 | 470 | if (skb->nf_bridge && skb->nf_bridge->physoutdev) { |
601e68e1 | 471 | tmp_uint = |
fbcd923c | 472 | htonl(skb->nf_bridge->physoutdev->ifindex); |
df6fb868 | 473 | NLA_PUT(inst->skb, NFULA_IFINDEX_PHYSOUTDEV, |
fbcd923c HW |
474 | sizeof(tmp_uint), &tmp_uint); |
475 | } | |
476 | } | |
477 | #endif | |
0597f268 HW |
478 | } |
479 | ||
82e91ffe TG |
480 | if (skb->mark) { |
481 | tmp_uint = htonl(skb->mark); | |
df6fb868 | 482 | NLA_PUT(inst->skb, NFULA_MARK, sizeof(tmp_uint), &tmp_uint); |
0597f268 HW |
483 | } |
484 | ||
b95cce35 | 485 | if (indev && skb->dev) { |
0597f268 | 486 | struct nfulnl_msg_packet_hw phw; |
b95cce35 SH |
487 | int len = dev_parse_header(skb, phw.hw_addr); |
488 | if (len > 0) { | |
489 | phw.hw_addrlen = htons(len); | |
df6fb868 | 490 | NLA_PUT(inst->skb, NFULA_HWADDR, sizeof(phw), &phw); |
b95cce35 | 491 | } |
0597f268 HW |
492 | } |
493 | ||
b7aa0bf7 | 494 | if (skb->tstamp.tv64) { |
0597f268 | 495 | struct nfulnl_msg_packet_timestamp ts; |
b7aa0bf7 ED |
496 | struct timeval tv = ktime_to_timeval(skb->tstamp); |
497 | ts.sec = cpu_to_be64(tv.tv_sec); | |
498 | ts.usec = cpu_to_be64(tv.tv_usec); | |
0597f268 | 499 | |
df6fb868 | 500 | NLA_PUT(inst->skb, NFULA_TIMESTAMP, sizeof(ts), &ts); |
0597f268 HW |
501 | } |
502 | ||
503 | /* UID */ | |
504 | if (skb->sk) { | |
505 | read_lock_bh(&skb->sk->sk_callback_lock); | |
506 | if (skb->sk->sk_socket && skb->sk->sk_socket->file) { | |
98a4a861 | 507 | __be32 uid = htonl(skb->sk->sk_socket->file->f_uid); |
df6fb868 | 508 | /* need to unlock here since NLA_PUT may goto */ |
0597f268 | 509 | read_unlock_bh(&skb->sk->sk_callback_lock); |
df6fb868 | 510 | NLA_PUT(inst->skb, NFULA_UID, sizeof(uid), &uid); |
0597f268 HW |
511 | } else |
512 | read_unlock_bh(&skb->sk->sk_callback_lock); | |
513 | } | |
514 | ||
0af5f6c1 HW |
515 | /* local sequence number */ |
516 | if (inst->flags & NFULNL_CFG_F_SEQ) { | |
517 | tmp_uint = htonl(inst->seq++); | |
df6fb868 | 518 | NLA_PUT(inst->skb, NFULA_SEQ, sizeof(tmp_uint), &tmp_uint); |
0af5f6c1 HW |
519 | } |
520 | /* global sequence number */ | |
521 | if (inst->flags & NFULNL_CFG_F_SEQ_GLOBAL) { | |
7fdeaf68 | 522 | tmp_uint = htonl(atomic_inc_return(&global_seq)); |
df6fb868 | 523 | NLA_PUT(inst->skb, NFULA_SEQ_GLOBAL, sizeof(tmp_uint), &tmp_uint); |
0af5f6c1 HW |
524 | } |
525 | ||
0597f268 | 526 | if (data_len) { |
df6fb868 PM |
527 | struct nlattr *nla; |
528 | int size = nla_attr_size(data_len); | |
0597f268 | 529 | |
df6fb868 | 530 | if (skb_tailroom(inst->skb) < nla_total_size(data_len)) { |
0597f268 HW |
531 | printk(KERN_WARNING "nfnetlink_log: no tailroom!\n"); |
532 | goto nlmsg_failure; | |
533 | } | |
534 | ||
df6fb868 PM |
535 | nla = (struct nlattr *)skb_put(inst->skb, nla_total_size(data_len)); |
536 | nla->nla_type = NFULA_PAYLOAD; | |
537 | nla->nla_len = size; | |
0597f268 | 538 | |
df6fb868 | 539 | if (skb_copy_bits(skb, 0, nla_data(nla), data_len)) |
0597f268 HW |
540 | BUG(); |
541 | } | |
601e68e1 | 542 | |
0597f268 HW |
543 | nlh->nlmsg_len = inst->skb->tail - old_tail; |
544 | return 0; | |
545 | ||
546 | nlmsg_failure: | |
547 | UDEBUG("nlmsg_failure\n"); | |
df6fb868 | 548 | nla_put_failure: |
0597f268 HW |
549 | PRINTR(KERN_ERR "nfnetlink_log: error creating log nlmsg\n"); |
550 | return -1; | |
551 | } | |
552 | ||
553 | #define RCV_SKB_FAIL(err) do { netlink_ack(skb, nlh, (err)); return; } while (0) | |
554 | ||
555 | static struct nf_loginfo default_loginfo = { | |
556 | .type = NF_LOG_TYPE_ULOG, | |
557 | .u = { | |
558 | .ulog = { | |
559 | .copy_len = 0xffff, | |
560 | .group = 0, | |
561 | .qthreshold = 1, | |
562 | }, | |
563 | }, | |
564 | }; | |
565 | ||
566 | /* log handler for internal netfilter logging api */ | |
567 | static void | |
568 | nfulnl_log_packet(unsigned int pf, | |
569 | unsigned int hooknum, | |
570 | const struct sk_buff *skb, | |
571 | const struct net_device *in, | |
572 | const struct net_device *out, | |
573 | const struct nf_loginfo *li_user, | |
574 | const char *prefix) | |
575 | { | |
576 | unsigned int size, data_len; | |
577 | struct nfulnl_instance *inst; | |
578 | const struct nf_loginfo *li; | |
579 | unsigned int qthreshold; | |
d7a5c324 | 580 | unsigned int plen; |
0597f268 | 581 | |
601e68e1 | 582 | if (li_user && li_user->type == NF_LOG_TYPE_ULOG) |
0597f268 HW |
583 | li = li_user; |
584 | else | |
585 | li = &default_loginfo; | |
586 | ||
587 | inst = instance_lookup_get(li->u.ulog.group); | |
588 | if (!inst) | |
0597f268 | 589 | return; |
0597f268 | 590 | |
d7a5c324 PM |
591 | plen = 0; |
592 | if (prefix) | |
881dbfe8 | 593 | plen = strlen(prefix) + 1; |
d7a5c324 | 594 | |
0597f268 HW |
595 | /* FIXME: do we want to make the size calculation conditional based on |
596 | * what is actually present? way more branches and checks, but more | |
597 | * memory efficient... */ | |
df6fb868 PM |
598 | size = NLMSG_ALIGN(sizeof(struct nfgenmsg)) |
599 | + nla_total_size(sizeof(struct nfulnl_msg_packet_hdr)) | |
600 | + nla_total_size(sizeof(u_int32_t)) /* ifindex */ | |
601 | + nla_total_size(sizeof(u_int32_t)) /* ifindex */ | |
fbcd923c | 602 | #ifdef CONFIG_BRIDGE_NETFILTER |
df6fb868 PM |
603 | + nla_total_size(sizeof(u_int32_t)) /* ifindex */ |
604 | + nla_total_size(sizeof(u_int32_t)) /* ifindex */ | |
fbcd923c | 605 | #endif |
df6fb868 PM |
606 | + nla_total_size(sizeof(u_int32_t)) /* mark */ |
607 | + nla_total_size(sizeof(u_int32_t)) /* uid */ | |
608 | + nla_total_size(plen) /* prefix */ | |
609 | + nla_total_size(sizeof(struct nfulnl_msg_packet_hw)) | |
610 | + nla_total_size(sizeof(struct nfulnl_msg_packet_timestamp)); | |
0597f268 HW |
611 | |
612 | UDEBUG("initial size=%u\n", size); | |
613 | ||
614 | spin_lock_bh(&inst->lock); | |
615 | ||
0af5f6c1 | 616 | if (inst->flags & NFULNL_CFG_F_SEQ) |
df6fb868 | 617 | size += nla_total_size(sizeof(u_int32_t)); |
0af5f6c1 | 618 | if (inst->flags & NFULNL_CFG_F_SEQ_GLOBAL) |
df6fb868 | 619 | size += nla_total_size(sizeof(u_int32_t)); |
0af5f6c1 | 620 | |
0597f268 HW |
621 | qthreshold = inst->qthreshold; |
622 | /* per-rule qthreshold overrides per-instance */ | |
623 | if (qthreshold > li->u.ulog.qthreshold) | |
624 | qthreshold = li->u.ulog.qthreshold; | |
601e68e1 | 625 | |
0597f268 HW |
626 | switch (inst->copy_mode) { |
627 | case NFULNL_COPY_META: | |
628 | case NFULNL_COPY_NONE: | |
629 | data_len = 0; | |
630 | break; | |
601e68e1 | 631 | |
0597f268 | 632 | case NFULNL_COPY_PACKET: |
601e68e1 | 633 | if (inst->copy_range == 0 |
0597f268 HW |
634 | || inst->copy_range > skb->len) |
635 | data_len = skb->len; | |
636 | else | |
637 | data_len = inst->copy_range; | |
601e68e1 | 638 | |
df6fb868 | 639 | size += nla_total_size(data_len); |
0597f268 HW |
640 | UDEBUG("copy_packet, therefore size now %u\n", size); |
641 | break; | |
601e68e1 | 642 | |
0597f268 | 643 | default: |
55b5a91e | 644 | goto unlock_and_release; |
0597f268 HW |
645 | } |
646 | ||
d63b043d MM |
647 | if (inst->skb && |
648 | size > skb_tailroom(inst->skb) - sizeof(struct nfgenmsg)) { | |
0597f268 HW |
649 | /* either the queue len is too high or we don't have |
650 | * enough room in the skb left. flush to userspace. */ | |
651 | UDEBUG("flushing old skb\n"); | |
652 | ||
e3567061 | 653 | __nfulnl_flush(inst); |
55b5a91e | 654 | } |
0597f268 | 655 | |
55b5a91e MM |
656 | if (!inst->skb) { |
657 | inst->skb = nfulnl_alloc_skb(inst->nlbufsiz, size); | |
658 | if (!inst->skb) | |
0597f268 | 659 | goto alloc_failure; |
0597f268 HW |
660 | } |
661 | ||
662 | UDEBUG("qlen %d, qthreshold %d\n", inst->qlen, qthreshold); | |
663 | inst->qlen++; | |
664 | ||
665 | __build_packet_message(inst, skb, data_len, pf, | |
d7a5c324 | 666 | hooknum, in, out, li, prefix, plen); |
0597f268 | 667 | |
d63b043d MM |
668 | if (inst->qlen >= qthreshold) |
669 | __nfulnl_flush(inst); | |
0597f268 HW |
670 | /* timer_pending always called within inst->lock, so there |
671 | * is no chance of a race here */ | |
d63b043d | 672 | else if (!timer_pending(&inst->timer)) { |
0597f268 HW |
673 | instance_get(inst); |
674 | inst->timer.expires = jiffies + (inst->flushtimeout*HZ/100); | |
675 | add_timer(&inst->timer); | |
676 | } | |
0597f268 | 677 | |
ed32abea MM |
678 | unlock_and_release: |
679 | spin_unlock_bh(&inst->lock); | |
680 | instance_put(inst); | |
0597f268 HW |
681 | return; |
682 | ||
683 | alloc_failure: | |
0597f268 HW |
684 | UDEBUG("error allocating skb\n"); |
685 | /* FIXME: statistics */ | |
ed32abea | 686 | goto unlock_and_release; |
0597f268 HW |
687 | } |
688 | ||
689 | static int | |
690 | nfulnl_rcv_nl_event(struct notifier_block *this, | |
691 | unsigned long event, void *ptr) | |
692 | { | |
693 | struct netlink_notify *n = ptr; | |
694 | ||
695 | if (event == NETLINK_URELEASE && | |
696 | n->protocol == NETLINK_NETFILTER && n->pid) { | |
697 | int i; | |
698 | ||
699 | /* destroy all instances for this pid */ | |
700 | write_lock_bh(&instances_lock); | |
701 | for (i = 0; i < INSTANCE_BUCKETS; i++) { | |
702 | struct hlist_node *tmp, *t2; | |
703 | struct nfulnl_instance *inst; | |
704 | struct hlist_head *head = &instance_table[i]; | |
705 | ||
706 | hlist_for_each_entry_safe(inst, tmp, t2, head, hlist) { | |
707 | UDEBUG("node = %p\n", inst); | |
b4b51029 EB |
708 | if ((n->net == &init_net) && |
709 | (n->pid == inst->peer_pid)) | |
0597f268 HW |
710 | __instance_destroy(inst); |
711 | } | |
712 | } | |
713 | write_unlock_bh(&instances_lock); | |
714 | } | |
715 | return NOTIFY_DONE; | |
716 | } | |
717 | ||
718 | static struct notifier_block nfulnl_rtnl_notifier = { | |
719 | .notifier_call = nfulnl_rcv_nl_event, | |
720 | }; | |
721 | ||
722 | static int | |
723 | nfulnl_recv_unsupp(struct sock *ctnl, struct sk_buff *skb, | |
df6fb868 | 724 | struct nlmsghdr *nlh, struct nlattr *nfqa[]) |
0597f268 HW |
725 | { |
726 | return -ENOTSUPP; | |
727 | } | |
728 | ||
7b2f9631 | 729 | static const struct nf_logger nfulnl_logger = { |
0597f268 HW |
730 | .name = "nfnetlink_log", |
731 | .logfn = &nfulnl_log_packet, | |
732 | .me = THIS_MODULE, | |
733 | }; | |
734 | ||
fd8281ad PM |
735 | static const struct nla_policy nfula_cfg_policy[NFULA_CFG_MAX+1] = { |
736 | [NFULA_CFG_CMD] = { .len = sizeof(struct nfulnl_msg_config_cmd) }, | |
737 | [NFULA_CFG_MODE] = { .len = sizeof(struct nfulnl_msg_config_mode) }, | |
738 | [NFULA_CFG_TIMEOUT] = { .type = NLA_U32 }, | |
739 | [NFULA_CFG_QTHRESH] = { .type = NLA_U32 }, | |
740 | [NFULA_CFG_NLBUFSIZ] = { .type = NLA_U32 }, | |
741 | [NFULA_CFG_FLAGS] = { .type = NLA_U16 }, | |
0597f268 HW |
742 | }; |
743 | ||
744 | static int | |
745 | nfulnl_recv_config(struct sock *ctnl, struct sk_buff *skb, | |
df6fb868 | 746 | struct nlmsghdr *nlh, struct nlattr *nfula[]) |
0597f268 HW |
747 | { |
748 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); | |
749 | u_int16_t group_num = ntohs(nfmsg->res_id); | |
750 | struct nfulnl_instance *inst; | |
751 | int ret = 0; | |
752 | ||
753 | UDEBUG("entering for msg %u\n", NFNL_MSG_TYPE(nlh->nlmsg_type)); | |
754 | ||
0597f268 | 755 | inst = instance_lookup_get(group_num); |
df6fb868 | 756 | if (nfula[NFULA_CFG_CMD]) { |
0597f268 HW |
757 | u_int8_t pf = nfmsg->nfgen_family; |
758 | struct nfulnl_msg_config_cmd *cmd; | |
df6fb868 | 759 | cmd = nla_data(nfula[NFULA_CFG_CMD]); |
0597f268 HW |
760 | UDEBUG("found CFG_CMD for\n"); |
761 | ||
762 | switch (cmd->command) { | |
763 | case NFULNL_CFG_CMD_BIND: | |
764 | if (inst) { | |
765 | ret = -EBUSY; | |
766 | goto out_put; | |
767 | } | |
768 | ||
769 | inst = instance_create(group_num, | |
770 | NETLINK_CB(skb).pid); | |
771 | if (!inst) { | |
772 | ret = -EINVAL; | |
f414c16c | 773 | goto out; |
0597f268 HW |
774 | } |
775 | break; | |
776 | case NFULNL_CFG_CMD_UNBIND: | |
777 | if (!inst) { | |
778 | ret = -ENODEV; | |
f414c16c | 779 | goto out; |
0597f268 HW |
780 | } |
781 | ||
782 | if (inst->peer_pid != NETLINK_CB(skb).pid) { | |
783 | ret = -EPERM; | |
784 | goto out_put; | |
785 | } | |
786 | ||
787 | instance_destroy(inst); | |
9a36e8c2 | 788 | goto out; |
0597f268 HW |
789 | case NFULNL_CFG_CMD_PF_BIND: |
790 | UDEBUG("registering log handler for pf=%u\n", pf); | |
791 | ret = nf_log_register(pf, &nfulnl_logger); | |
792 | break; | |
793 | case NFULNL_CFG_CMD_PF_UNBIND: | |
794 | UDEBUG("unregistering log handler for pf=%u\n", pf); | |
795 | /* This is a bug and a feature. We cannot unregister | |
796 | * other handlers, like nfnetlink_inst can */ | |
797 | nf_log_unregister_pf(pf); | |
798 | break; | |
799 | default: | |
800 | ret = -EINVAL; | |
801 | break; | |
802 | } | |
dd16704e MM |
803 | |
804 | if (!inst) | |
805 | goto out; | |
0597f268 HW |
806 | } else { |
807 | if (!inst) { | |
808 | UDEBUG("no config command, and no instance for " | |
809 | "group=%u pid=%u =>ENOENT\n", | |
810 | group_num, NETLINK_CB(skb).pid); | |
811 | ret = -ENOENT; | |
f414c16c | 812 | goto out; |
0597f268 HW |
813 | } |
814 | ||
815 | if (inst->peer_pid != NETLINK_CB(skb).pid) { | |
816 | UDEBUG("no config command, and wrong pid\n"); | |
817 | ret = -EPERM; | |
818 | goto out_put; | |
819 | } | |
820 | } | |
821 | ||
df6fb868 | 822 | if (nfula[NFULA_CFG_MODE]) { |
0597f268 | 823 | struct nfulnl_msg_config_mode *params; |
df6fb868 | 824 | params = nla_data(nfula[NFULA_CFG_MODE]); |
0597f268 HW |
825 | |
826 | nfulnl_set_mode(inst, params->copy_mode, | |
d1208b99 | 827 | ntohl(params->copy_range)); |
0597f268 HW |
828 | } |
829 | ||
df6fb868 | 830 | if (nfula[NFULA_CFG_TIMEOUT]) { |
98a4a861 | 831 | __be32 timeout = |
df6fb868 | 832 | *(__be32 *)nla_data(nfula[NFULA_CFG_TIMEOUT]); |
0597f268 HW |
833 | |
834 | nfulnl_set_timeout(inst, ntohl(timeout)); | |
835 | } | |
836 | ||
df6fb868 | 837 | if (nfula[NFULA_CFG_NLBUFSIZ]) { |
98a4a861 | 838 | __be32 nlbufsiz = |
df6fb868 | 839 | *(__be32 *)nla_data(nfula[NFULA_CFG_NLBUFSIZ]); |
0597f268 HW |
840 | |
841 | nfulnl_set_nlbufsiz(inst, ntohl(nlbufsiz)); | |
842 | } | |
843 | ||
df6fb868 | 844 | if (nfula[NFULA_CFG_QTHRESH]) { |
7ac00a24 | 845 | __be32 qthresh = |
df6fb868 | 846 | *(__be32 *)nla_data(nfula[NFULA_CFG_QTHRESH]); |
0597f268 HW |
847 | |
848 | nfulnl_set_qthresh(inst, ntohl(qthresh)); | |
849 | } | |
850 | ||
df6fb868 | 851 | if (nfula[NFULA_CFG_FLAGS]) { |
98a4a861 | 852 | __be16 flags = |
df6fb868 | 853 | *(__be16 *)nla_data(nfula[NFULA_CFG_FLAGS]); |
ee433530 | 854 | nfulnl_set_flags(inst, ntohs(flags)); |
0af5f6c1 HW |
855 | } |
856 | ||
0597f268 HW |
857 | out_put: |
858 | instance_put(inst); | |
dd16704e | 859 | out: |
0597f268 HW |
860 | return ret; |
861 | } | |
862 | ||
7c8d4cb4 | 863 | static const struct nfnl_callback nfulnl_cb[NFULNL_MSG_MAX] = { |
0597f268 | 864 | [NFULNL_MSG_PACKET] = { .call = nfulnl_recv_unsupp, |
37d2e7a2 | 865 | .attr_count = NFULA_MAX, }, |
0597f268 | 866 | [NFULNL_MSG_CONFIG] = { .call = nfulnl_recv_config, |
fd8281ad PM |
867 | .attr_count = NFULA_CFG_MAX, |
868 | .policy = nfula_cfg_policy }, | |
0597f268 HW |
869 | }; |
870 | ||
7c8d4cb4 | 871 | static const struct nfnetlink_subsystem nfulnl_subsys = { |
0597f268 HW |
872 | .name = "log", |
873 | .subsys_id = NFNL_SUBSYS_ULOG, | |
874 | .cb_count = NFULNL_MSG_MAX, | |
0597f268 HW |
875 | .cb = nfulnl_cb, |
876 | }; | |
877 | ||
878 | #ifdef CONFIG_PROC_FS | |
879 | struct iter_state { | |
880 | unsigned int bucket; | |
881 | }; | |
882 | ||
f76cdcee | 883 | static struct hlist_node *get_first(struct iter_state *st) |
0597f268 | 884 | { |
0597f268 HW |
885 | if (!st) |
886 | return NULL; | |
887 | ||
888 | for (st->bucket = 0; st->bucket < INSTANCE_BUCKETS; st->bucket++) { | |
889 | if (!hlist_empty(&instance_table[st->bucket])) | |
890 | return instance_table[st->bucket].first; | |
891 | } | |
892 | return NULL; | |
893 | } | |
894 | ||
f76cdcee | 895 | static struct hlist_node *get_next(struct iter_state *st, struct hlist_node *h) |
0597f268 | 896 | { |
0597f268 HW |
897 | h = h->next; |
898 | while (!h) { | |
899 | if (++st->bucket >= INSTANCE_BUCKETS) | |
900 | return NULL; | |
901 | ||
902 | h = instance_table[st->bucket].first; | |
903 | } | |
904 | return h; | |
905 | } | |
906 | ||
f76cdcee | 907 | static struct hlist_node *get_idx(struct iter_state *st, loff_t pos) |
0597f268 HW |
908 | { |
909 | struct hlist_node *head; | |
f76cdcee | 910 | head = get_first(st); |
0597f268 HW |
911 | |
912 | if (head) | |
f76cdcee | 913 | while (pos && (head = get_next(st, head))) |
0597f268 HW |
914 | pos--; |
915 | return pos ? NULL : head; | |
916 | } | |
917 | ||
918 | static void *seq_start(struct seq_file *seq, loff_t *pos) | |
919 | { | |
920 | read_lock_bh(&instances_lock); | |
f76cdcee | 921 | return get_idx(seq->private, *pos); |
0597f268 HW |
922 | } |
923 | ||
924 | static void *seq_next(struct seq_file *s, void *v, loff_t *pos) | |
925 | { | |
926 | (*pos)++; | |
f76cdcee | 927 | return get_next(s->private, v); |
0597f268 HW |
928 | } |
929 | ||
930 | static void seq_stop(struct seq_file *s, void *v) | |
931 | { | |
932 | read_unlock_bh(&instances_lock); | |
933 | } | |
934 | ||
935 | static int seq_show(struct seq_file *s, void *v) | |
936 | { | |
937 | const struct nfulnl_instance *inst = v; | |
938 | ||
601e68e1 | 939 | return seq_printf(s, "%5d %6d %5d %1d %5d %6d %2d\n", |
0597f268 | 940 | inst->group_num, |
601e68e1 | 941 | inst->peer_pid, inst->qlen, |
0597f268 HW |
942 | inst->copy_mode, inst->copy_range, |
943 | inst->flushtimeout, atomic_read(&inst->use)); | |
944 | } | |
945 | ||
56b3d975 | 946 | static const struct seq_operations nful_seq_ops = { |
0597f268 HW |
947 | .start = seq_start, |
948 | .next = seq_next, | |
949 | .stop = seq_stop, | |
950 | .show = seq_show, | |
951 | }; | |
952 | ||
953 | static int nful_open(struct inode *inode, struct file *file) | |
954 | { | |
e2da5913 PE |
955 | return seq_open_private(file, &nful_seq_ops, |
956 | sizeof(struct iter_state)); | |
0597f268 HW |
957 | } |
958 | ||
da7071d7 | 959 | static const struct file_operations nful_file_ops = { |
0597f268 HW |
960 | .owner = THIS_MODULE, |
961 | .open = nful_open, | |
962 | .read = seq_read, | |
963 | .llseek = seq_lseek, | |
964 | .release = seq_release_private, | |
965 | }; | |
966 | ||
967 | #endif /* PROC_FS */ | |
968 | ||
32292a7f | 969 | static int __init nfnetlink_log_init(void) |
0597f268 HW |
970 | { |
971 | int i, status = -ENOMEM; | |
972 | #ifdef CONFIG_PROC_FS | |
973 | struct proc_dir_entry *proc_nful; | |
974 | #endif | |
601e68e1 | 975 | |
0597f268 HW |
976 | for (i = 0; i < INSTANCE_BUCKETS; i++) |
977 | INIT_HLIST_HEAD(&instance_table[i]); | |
601e68e1 | 978 | |
0597f268 HW |
979 | /* it's not really all that important to have a random value, so |
980 | * we can do this from the init function, even if there hasn't | |
981 | * been that much entropy yet */ | |
982 | get_random_bytes(&hash_init, sizeof(hash_init)); | |
983 | ||
984 | netlink_register_notifier(&nfulnl_rtnl_notifier); | |
985 | status = nfnetlink_subsys_register(&nfulnl_subsys); | |
986 | if (status < 0) { | |
987 | printk(KERN_ERR "log: failed to create netlink socket\n"); | |
988 | goto cleanup_netlink_notifier; | |
989 | } | |
990 | ||
991 | #ifdef CONFIG_PROC_FS | |
992 | proc_nful = create_proc_entry("nfnetlink_log", 0440, | |
993 | proc_net_netfilter); | |
994 | if (!proc_nful) | |
995 | goto cleanup_subsys; | |
996 | proc_nful->proc_fops = &nful_file_ops; | |
997 | #endif | |
0597f268 HW |
998 | return status; |
999 | ||
0597f268 | 1000 | #ifdef CONFIG_PROC_FS |
0597f268 | 1001 | cleanup_subsys: |
0597f268 | 1002 | nfnetlink_subsys_unregister(&nfulnl_subsys); |
32292a7f | 1003 | #endif |
0597f268 HW |
1004 | cleanup_netlink_notifier: |
1005 | netlink_unregister_notifier(&nfulnl_rtnl_notifier); | |
1006 | return status; | |
1007 | } | |
1008 | ||
65b4b4e8 | 1009 | static void __exit nfnetlink_log_fini(void) |
0597f268 | 1010 | { |
e92ad99c | 1011 | nf_log_unregister(&nfulnl_logger); |
32292a7f PM |
1012 | #ifdef CONFIG_PROC_FS |
1013 | remove_proc_entry("nfnetlink_log", proc_net_netfilter); | |
1014 | #endif | |
1015 | nfnetlink_subsys_unregister(&nfulnl_subsys); | |
1016 | netlink_unregister_notifier(&nfulnl_rtnl_notifier); | |
0597f268 HW |
1017 | } |
1018 | ||
1019 | MODULE_DESCRIPTION("netfilter userspace logging"); | |
1020 | MODULE_AUTHOR("Harald Welte <laforge@netfilter.org>"); | |
1021 | MODULE_LICENSE("GPL"); | |
f682faef | 1022 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_ULOG); |
0597f268 | 1023 | |
65b4b4e8 AM |
1024 | module_init(nfnetlink_log_init); |
1025 | module_exit(nfnetlink_log_fini); |