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