Commit | Line | Data |
---|---|---|
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 |
0597f268 HW |
40 | #define NFULNL_TIMEOUT_DEFAULT 100 /* every second */ |
41 | #define NFULNL_QTHRESH_DEFAULT 100 /* 100 packets */ | |
42 | ||
43 | #define PRINTR(x, args...) do { if (net_ratelimit()) \ | |
44 | printk(x, ## args); } while (0); | |
45 | ||
46 | #if 0 | |
47 | #define UDEBUG(x, args ...) printk(KERN_DEBUG "%s(%d):%s(): " x, \ | |
48 | __FILE__, __LINE__, __FUNCTION__, \ | |
49 | ## args) | |
50 | #else | |
51 | #define UDEBUG(x, ...) | |
52 | #endif | |
53 | ||
54 | struct nfulnl_instance { | |
55 | struct hlist_node hlist; /* global list of instances */ | |
56 | spinlock_t lock; | |
57 | atomic_t use; /* use count */ | |
58 | ||
59 | unsigned int qlen; /* number of nlmsgs in skb */ | |
60 | struct sk_buff *skb; /* pre-allocatd skb */ | |
61 | struct nlmsghdr *lastnlh; /* netlink header of last msg in skb */ | |
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 | ||
0597f268 | 156 | INIT_HLIST_NODE(&inst->hlist); |
181a46a5 | 157 | spin_lock_init(&inst->lock); |
0597f268 HW |
158 | /* needs to be two, since we _put() after creation */ |
159 | atomic_set(&inst->use, 2); | |
160 | ||
e6f689db | 161 | setup_timer(&inst->timer, nfulnl_timer, (unsigned long)inst); |
0597f268 HW |
162 | |
163 | inst->peer_pid = pid; | |
164 | inst->group_num = group_num; | |
165 | ||
166 | inst->qthreshold = NFULNL_QTHRESH_DEFAULT; | |
167 | inst->flushtimeout = NFULNL_TIMEOUT_DEFAULT; | |
168 | inst->nlbufsiz = NFULNL_NLBUFSIZ_DEFAULT; | |
169 | inst->copy_mode = NFULNL_COPY_PACKET; | |
170 | inst->copy_range = 0xffff; | |
171 | ||
172 | if (!try_module_get(THIS_MODULE)) | |
173 | goto out_free; | |
174 | ||
601e68e1 | 175 | hlist_add_head(&inst->hlist, |
0597f268 HW |
176 | &instance_table[instance_hashfn(group_num)]); |
177 | ||
601e68e1 | 178 | UDEBUG("newly added node: %p, next=%p\n", &inst->hlist, |
0597f268 HW |
179 | inst->hlist.next); |
180 | ||
181 | write_unlock_bh(&instances_lock); | |
182 | ||
183 | return inst; | |
184 | ||
185 | out_free: | |
186 | instance_put(inst); | |
187 | out_unlock: | |
188 | write_unlock_bh(&instances_lock); | |
189 | return NULL; | |
190 | } | |
191 | ||
192 | static int __nfulnl_send(struct nfulnl_instance *inst); | |
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); | |
206 | if (inst->skb) { | |
b4d6202b MM |
207 | /* timer "holds" one reference (we have one more) */ |
208 | if (del_timer(&inst->timer)) | |
209 | instance_put(inst); | |
0597f268 HW |
210 | if (inst->qlen) |
211 | __nfulnl_send(inst); | |
212 | if (inst->skb) { | |
213 | kfree_skb(inst->skb); | |
214 | inst->skb = NULL; | |
215 | } | |
216 | } | |
217 | spin_unlock_bh(&inst->lock); | |
218 | ||
219 | /* and finally put the refcount */ | |
220 | instance_put(inst); | |
0597f268 HW |
221 | } |
222 | ||
0597f268 HW |
223 | static inline void |
224 | instance_destroy(struct nfulnl_instance *inst) | |
225 | { | |
9afdb00c PM |
226 | write_lock_bh(&instances_lock); |
227 | __instance_destroy(inst); | |
228 | write_unlock_bh(&instances_lock); | |
0597f268 HW |
229 | } |
230 | ||
231 | static int | |
232 | nfulnl_set_mode(struct nfulnl_instance *inst, u_int8_t mode, | |
233 | unsigned int range) | |
234 | { | |
235 | int status = 0; | |
236 | ||
237 | spin_lock_bh(&inst->lock); | |
601e68e1 | 238 | |
0597f268 HW |
239 | switch (mode) { |
240 | case NFULNL_COPY_NONE: | |
241 | case NFULNL_COPY_META: | |
242 | inst->copy_mode = mode; | |
243 | inst->copy_range = 0; | |
244 | break; | |
601e68e1 | 245 | |
0597f268 HW |
246 | case NFULNL_COPY_PACKET: |
247 | inst->copy_mode = mode; | |
248 | /* we're using struct nfattr which has 16bit nfa_len */ | |
249 | if (range > 0xffff) | |
250 | inst->copy_range = 0xffff; | |
251 | else | |
252 | inst->copy_range = range; | |
253 | break; | |
601e68e1 | 254 | |
0597f268 HW |
255 | default: |
256 | status = -EINVAL; | |
257 | break; | |
258 | } | |
259 | ||
260 | spin_unlock_bh(&inst->lock); | |
261 | ||
262 | return status; | |
263 | } | |
264 | ||
265 | static int | |
266 | nfulnl_set_nlbufsiz(struct nfulnl_instance *inst, u_int32_t nlbufsiz) | |
267 | { | |
268 | int status; | |
269 | ||
270 | spin_lock_bh(&inst->lock); | |
271 | if (nlbufsiz < NFULNL_NLBUFSIZ_DEFAULT) | |
272 | status = -ERANGE; | |
273 | else if (nlbufsiz > 131072) | |
274 | status = -ERANGE; | |
275 | else { | |
276 | inst->nlbufsiz = nlbufsiz; | |
277 | status = 0; | |
278 | } | |
279 | spin_unlock_bh(&inst->lock); | |
280 | ||
281 | return status; | |
282 | } | |
283 | ||
284 | static int | |
285 | nfulnl_set_timeout(struct nfulnl_instance *inst, u_int32_t timeout) | |
286 | { | |
287 | spin_lock_bh(&inst->lock); | |
288 | inst->flushtimeout = timeout; | |
289 | spin_unlock_bh(&inst->lock); | |
290 | ||
291 | return 0; | |
292 | } | |
293 | ||
294 | static int | |
295 | nfulnl_set_qthresh(struct nfulnl_instance *inst, u_int32_t qthresh) | |
296 | { | |
297 | spin_lock_bh(&inst->lock); | |
298 | inst->qthreshold = qthresh; | |
299 | spin_unlock_bh(&inst->lock); | |
300 | ||
301 | return 0; | |
302 | } | |
303 | ||
0af5f6c1 HW |
304 | static int |
305 | nfulnl_set_flags(struct nfulnl_instance *inst, u_int16_t flags) | |
306 | { | |
307 | spin_lock_bh(&inst->lock); | |
ee433530 | 308 | inst->flags = flags; |
0af5f6c1 HW |
309 | spin_unlock_bh(&inst->lock); |
310 | ||
311 | return 0; | |
312 | } | |
313 | ||
601e68e1 | 314 | static struct sk_buff *nfulnl_alloc_skb(unsigned int inst_size, |
0597f268 HW |
315 | unsigned int pkt_size) |
316 | { | |
317 | struct sk_buff *skb; | |
ad2ad0f9 | 318 | unsigned int n; |
0597f268 HW |
319 | |
320 | UDEBUG("entered (%u, %u)\n", inst_size, pkt_size); | |
321 | ||
322 | /* alloc skb which should be big enough for a whole multipart | |
323 | * message. WARNING: has to be <= 128k due to slab restrictions */ | |
324 | ||
ad2ad0f9 PM |
325 | n = max(inst_size, pkt_size); |
326 | skb = alloc_skb(n, GFP_ATOMIC); | |
0597f268 HW |
327 | if (!skb) { |
328 | PRINTR("nfnetlink_log: can't alloc whole buffer (%u bytes)\n", | |
329 | inst_size); | |
330 | ||
ad2ad0f9 PM |
331 | if (n > pkt_size) { |
332 | /* try to allocate only as much as we need for current | |
333 | * packet */ | |
0597f268 | 334 | |
ad2ad0f9 PM |
335 | skb = alloc_skb(pkt_size, GFP_ATOMIC); |
336 | if (!skb) | |
337 | PRINTR("nfnetlink_log: can't even alloc %u " | |
338 | "bytes\n", pkt_size); | |
339 | } | |
0597f268 HW |
340 | } |
341 | ||
342 | return skb; | |
343 | } | |
344 | ||
345 | static int | |
346 | __nfulnl_send(struct nfulnl_instance *inst) | |
347 | { | |
348 | int status; | |
349 | ||
0597f268 HW |
350 | if (inst->qlen > 1) |
351 | inst->lastnlh->nlmsg_type = NLMSG_DONE; | |
352 | ||
353 | status = nfnetlink_unicast(inst->skb, inst->peer_pid, MSG_DONTWAIT); | |
354 | if (status < 0) { | |
355 | UDEBUG("netlink_unicast() failed\n"); | |
356 | /* FIXME: statistics */ | |
357 | } | |
358 | ||
359 | inst->qlen = 0; | |
360 | inst->skb = NULL; | |
361 | inst->lastnlh = NULL; | |
362 | ||
363 | return status; | |
364 | } | |
365 | ||
366 | static void nfulnl_timer(unsigned long data) | |
367 | { | |
601e68e1 | 368 | struct nfulnl_instance *inst = (struct nfulnl_instance *)data; |
0597f268 HW |
369 | |
370 | UDEBUG("timer function called, flushing buffer\n"); | |
371 | ||
372 | spin_lock_bh(&inst->lock); | |
370e6a87 MM |
373 | if (inst->skb) |
374 | __nfulnl_send(inst); | |
0597f268 | 375 | spin_unlock_bh(&inst->lock); |
05f7b7b3 | 376 | instance_put(inst); |
0597f268 HW |
377 | } |
378 | ||
0af5f6c1 HW |
379 | /* This is an inline function, we don't really care about a long |
380 | * list of arguments */ | |
601e68e1 | 381 | static inline int |
0597f268 | 382 | __build_packet_message(struct nfulnl_instance *inst, |
601e68e1 | 383 | const struct sk_buff *skb, |
0597f268 HW |
384 | unsigned int data_len, |
385 | unsigned int pf, | |
386 | unsigned int hooknum, | |
387 | const struct net_device *indev, | |
388 | const struct net_device *outdev, | |
389 | const struct nf_loginfo *li, | |
d7a5c324 | 390 | const char *prefix, unsigned int plen) |
0597f268 | 391 | { |
0597f268 HW |
392 | struct nfulnl_msg_packet_hdr pmsg; |
393 | struct nlmsghdr *nlh; | |
394 | struct nfgenmsg *nfmsg; | |
98a4a861 | 395 | __be32 tmp_uint; |
27a884dc | 396 | sk_buff_data_t old_tail = inst->skb->tail; |
0597f268 HW |
397 | |
398 | UDEBUG("entered\n"); | |
601e68e1 | 399 | |
601e68e1 | 400 | nlh = NLMSG_PUT(inst->skb, 0, 0, |
0597f268 HW |
401 | NFNL_SUBSYS_ULOG << 8 | NFULNL_MSG_PACKET, |
402 | sizeof(struct nfgenmsg)); | |
403 | nfmsg = NLMSG_DATA(nlh); | |
404 | nfmsg->nfgen_family = pf; | |
405 | nfmsg->version = NFNETLINK_V0; | |
406 | nfmsg->res_id = htons(inst->group_num); | |
407 | ||
febf0a43 | 408 | pmsg.hw_protocol = skb->protocol; |
0597f268 HW |
409 | pmsg.hook = hooknum; |
410 | ||
411 | NFA_PUT(inst->skb, NFULA_PACKET_HDR, sizeof(pmsg), &pmsg); | |
412 | ||
d7a5c324 PM |
413 | if (prefix) |
414 | NFA_PUT(inst->skb, NFULA_PREFIX, plen, prefix); | |
0597f268 HW |
415 | |
416 | if (indev) { | |
417 | tmp_uint = htonl(indev->ifindex); | |
fbcd923c | 418 | #ifndef CONFIG_BRIDGE_NETFILTER |
0597f268 HW |
419 | NFA_PUT(inst->skb, NFULA_IFINDEX_INDEV, sizeof(tmp_uint), |
420 | &tmp_uint); | |
fbcd923c HW |
421 | #else |
422 | if (pf == PF_BRIDGE) { | |
423 | /* Case 1: outdev is physical input device, we need to | |
424 | * look for bridge group (when called from | |
425 | * netfilter_bridge) */ | |
426 | NFA_PUT(inst->skb, NFULA_IFINDEX_PHYSINDEV, | |
427 | sizeof(tmp_uint), &tmp_uint); | |
428 | /* this is the bridge group "brX" */ | |
429 | tmp_uint = htonl(indev->br_port->br->dev->ifindex); | |
430 | NFA_PUT(inst->skb, NFULA_IFINDEX_INDEV, | |
431 | sizeof(tmp_uint), &tmp_uint); | |
432 | } else { | |
433 | /* Case 2: indev is bridge group, we need to look for | |
434 | * physical device (when called from ipv4) */ | |
435 | NFA_PUT(inst->skb, NFULA_IFINDEX_INDEV, | |
436 | sizeof(tmp_uint), &tmp_uint); | |
437 | if (skb->nf_bridge && skb->nf_bridge->physindev) { | |
601e68e1 | 438 | tmp_uint = |
fbcd923c HW |
439 | htonl(skb->nf_bridge->physindev->ifindex); |
440 | NFA_PUT(inst->skb, NFULA_IFINDEX_PHYSINDEV, | |
441 | sizeof(tmp_uint), &tmp_uint); | |
442 | } | |
443 | } | |
444 | #endif | |
0597f268 HW |
445 | } |
446 | ||
447 | if (outdev) { | |
448 | tmp_uint = htonl(outdev->ifindex); | |
fbcd923c | 449 | #ifndef CONFIG_BRIDGE_NETFILTER |
0597f268 HW |
450 | NFA_PUT(inst->skb, NFULA_IFINDEX_OUTDEV, sizeof(tmp_uint), |
451 | &tmp_uint); | |
fbcd923c HW |
452 | #else |
453 | if (pf == PF_BRIDGE) { | |
454 | /* Case 1: outdev is physical output device, we need to | |
455 | * look for bridge group (when called from | |
456 | * netfilter_bridge) */ | |
457 | NFA_PUT(inst->skb, NFULA_IFINDEX_PHYSOUTDEV, | |
458 | sizeof(tmp_uint), &tmp_uint); | |
459 | /* this is the bridge group "brX" */ | |
460 | tmp_uint = htonl(outdev->br_port->br->dev->ifindex); | |
461 | NFA_PUT(inst->skb, NFULA_IFINDEX_OUTDEV, | |
462 | sizeof(tmp_uint), &tmp_uint); | |
463 | } else { | |
464 | /* Case 2: indev is a bridge group, we need to look | |
465 | * for physical device (when called from ipv4) */ | |
466 | NFA_PUT(inst->skb, NFULA_IFINDEX_OUTDEV, | |
467 | sizeof(tmp_uint), &tmp_uint); | |
ba5dcee1 | 468 | if (skb->nf_bridge && skb->nf_bridge->physoutdev) { |
601e68e1 | 469 | tmp_uint = |
fbcd923c HW |
470 | htonl(skb->nf_bridge->physoutdev->ifindex); |
471 | NFA_PUT(inst->skb, NFULA_IFINDEX_PHYSOUTDEV, | |
472 | sizeof(tmp_uint), &tmp_uint); | |
473 | } | |
474 | } | |
475 | #endif | |
0597f268 HW |
476 | } |
477 | ||
82e91ffe TG |
478 | if (skb->mark) { |
479 | tmp_uint = htonl(skb->mark); | |
0597f268 HW |
480 | NFA_PUT(inst->skb, NFULA_MARK, sizeof(tmp_uint), &tmp_uint); |
481 | } | |
482 | ||
483 | if (indev && skb->dev && skb->dev->hard_header_parse) { | |
484 | struct nfulnl_msg_packet_hw phw; | |
98a4a861 | 485 | int len = skb->dev->hard_header_parse((struct sk_buff *)skb, |
0597f268 | 486 | phw.hw_addr); |
98a4a861 | 487 | phw.hw_addrlen = htons(len); |
0597f268 HW |
488 | NFA_PUT(inst->skb, NFULA_HWADDR, sizeof(phw), &phw); |
489 | } | |
490 | ||
b7aa0bf7 | 491 | if (skb->tstamp.tv64) { |
0597f268 | 492 | struct nfulnl_msg_packet_timestamp ts; |
b7aa0bf7 ED |
493 | struct timeval tv = ktime_to_timeval(skb->tstamp); |
494 | ts.sec = cpu_to_be64(tv.tv_sec); | |
495 | ts.usec = cpu_to_be64(tv.tv_usec); | |
0597f268 HW |
496 | |
497 | NFA_PUT(inst->skb, NFULA_TIMESTAMP, sizeof(ts), &ts); | |
498 | } | |
499 | ||
500 | /* UID */ | |
501 | if (skb->sk) { | |
502 | read_lock_bh(&skb->sk->sk_callback_lock); | |
503 | if (skb->sk->sk_socket && skb->sk->sk_socket->file) { | |
98a4a861 | 504 | __be32 uid = htonl(skb->sk->sk_socket->file->f_uid); |
0597f268 HW |
505 | /* need to unlock here since NFA_PUT may goto */ |
506 | read_unlock_bh(&skb->sk->sk_callback_lock); | |
507 | NFA_PUT(inst->skb, NFULA_UID, sizeof(uid), &uid); | |
508 | } else | |
509 | read_unlock_bh(&skb->sk->sk_callback_lock); | |
510 | } | |
511 | ||
0af5f6c1 HW |
512 | /* local sequence number */ |
513 | if (inst->flags & NFULNL_CFG_F_SEQ) { | |
514 | tmp_uint = htonl(inst->seq++); | |
515 | NFA_PUT(inst->skb, NFULA_SEQ, sizeof(tmp_uint), &tmp_uint); | |
516 | } | |
517 | /* global sequence number */ | |
518 | if (inst->flags & NFULNL_CFG_F_SEQ_GLOBAL) { | |
7fdeaf68 | 519 | tmp_uint = htonl(atomic_inc_return(&global_seq)); |
0af5f6c1 HW |
520 | NFA_PUT(inst->skb, NFULA_SEQ_GLOBAL, sizeof(tmp_uint), &tmp_uint); |
521 | } | |
522 | ||
0597f268 HW |
523 | if (data_len) { |
524 | struct nfattr *nfa; | |
525 | int size = NFA_LENGTH(data_len); | |
526 | ||
527 | if (skb_tailroom(inst->skb) < (int)NFA_SPACE(data_len)) { | |
528 | printk(KERN_WARNING "nfnetlink_log: no tailroom!\n"); | |
529 | goto nlmsg_failure; | |
530 | } | |
531 | ||
532 | nfa = (struct nfattr *)skb_put(inst->skb, NFA_ALIGN(size)); | |
533 | nfa->nfa_type = NFULA_PAYLOAD; | |
534 | nfa->nfa_len = size; | |
535 | ||
536 | if (skb_copy_bits(skb, 0, NFA_DATA(nfa), data_len)) | |
537 | BUG(); | |
538 | } | |
601e68e1 | 539 | |
0597f268 | 540 | nlh->nlmsg_len = inst->skb->tail - old_tail; |
a497097d | 541 | inst->lastnlh = nlh; |
0597f268 HW |
542 | return 0; |
543 | ||
544 | nlmsg_failure: | |
545 | UDEBUG("nlmsg_failure\n"); | |
546 | nfattr_failure: | |
547 | PRINTR(KERN_ERR "nfnetlink_log: error creating log nlmsg\n"); | |
548 | return -1; | |
549 | } | |
550 | ||
551 | #define RCV_SKB_FAIL(err) do { netlink_ack(skb, nlh, (err)); return; } while (0) | |
552 | ||
553 | static struct nf_loginfo default_loginfo = { | |
554 | .type = NF_LOG_TYPE_ULOG, | |
555 | .u = { | |
556 | .ulog = { | |
557 | .copy_len = 0xffff, | |
558 | .group = 0, | |
559 | .qthreshold = 1, | |
560 | }, | |
561 | }, | |
562 | }; | |
563 | ||
564 | /* log handler for internal netfilter logging api */ | |
565 | static void | |
566 | nfulnl_log_packet(unsigned int pf, | |
567 | unsigned int hooknum, | |
568 | const struct sk_buff *skb, | |
569 | const struct net_device *in, | |
570 | const struct net_device *out, | |
571 | const struct nf_loginfo *li_user, | |
572 | const char *prefix) | |
573 | { | |
574 | unsigned int size, data_len; | |
575 | struct nfulnl_instance *inst; | |
576 | const struct nf_loginfo *li; | |
577 | unsigned int qthreshold; | |
d7a5c324 | 578 | unsigned int plen; |
0597f268 | 579 | |
601e68e1 | 580 | if (li_user && li_user->type == NF_LOG_TYPE_ULOG) |
0597f268 HW |
581 | li = li_user; |
582 | else | |
583 | li = &default_loginfo; | |
584 | ||
585 | inst = instance_lookup_get(li->u.ulog.group); | |
586 | if (!inst) | |
0597f268 | 587 | return; |
0597f268 | 588 | |
d7a5c324 PM |
589 | plen = 0; |
590 | if (prefix) | |
881dbfe8 | 591 | plen = strlen(prefix) + 1; |
d7a5c324 | 592 | |
0597f268 HW |
593 | /* all macros expand to constant values at compile time */ |
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... */ | |
597 | size = NLMSG_SPACE(sizeof(struct nfgenmsg)) | |
598 | + NFA_SPACE(sizeof(struct nfulnl_msg_packet_hdr)) | |
599 | + NFA_SPACE(sizeof(u_int32_t)) /* ifindex */ | |
600 | + NFA_SPACE(sizeof(u_int32_t)) /* ifindex */ | |
fbcd923c HW |
601 | #ifdef CONFIG_BRIDGE_NETFILTER |
602 | + NFA_SPACE(sizeof(u_int32_t)) /* ifindex */ | |
603 | + NFA_SPACE(sizeof(u_int32_t)) /* ifindex */ | |
604 | #endif | |
0597f268 HW |
605 | + NFA_SPACE(sizeof(u_int32_t)) /* mark */ |
606 | + NFA_SPACE(sizeof(u_int32_t)) /* uid */ | |
d7a5c324 | 607 | + NFA_SPACE(plen) /* prefix */ |
0597f268 HW |
608 | + NFA_SPACE(sizeof(struct nfulnl_msg_packet_hw)) |
609 | + NFA_SPACE(sizeof(struct nfulnl_msg_packet_timestamp)); | |
610 | ||
611 | UDEBUG("initial size=%u\n", size); | |
612 | ||
613 | spin_lock_bh(&inst->lock); | |
614 | ||
0af5f6c1 HW |
615 | if (inst->flags & NFULNL_CFG_F_SEQ) |
616 | size += NFA_SPACE(sizeof(u_int32_t)); | |
617 | if (inst->flags & NFULNL_CFG_F_SEQ_GLOBAL) | |
618 | size += NFA_SPACE(sizeof(u_int32_t)); | |
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 | |
0597f268 HW |
638 | size += NFA_SPACE(data_len); |
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 | ||
55b5a91e MM |
646 | if (inst->qlen >= qthreshold || |
647 | (inst->skb && size > skb_tailroom(inst->skb))) { | |
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 | ||
b4d6202b MM |
652 | /* timer "holds" one reference (we have another one) */ |
653 | if (del_timer(&inst->timer)) | |
654 | instance_put(inst); | |
0597f268 | 655 | __nfulnl_send(inst); |
55b5a91e | 656 | } |
0597f268 | 657 | |
55b5a91e MM |
658 | if (!inst->skb) { |
659 | inst->skb = nfulnl_alloc_skb(inst->nlbufsiz, size); | |
660 | if (!inst->skb) | |
0597f268 | 661 | goto alloc_failure; |
0597f268 HW |
662 | } |
663 | ||
664 | UDEBUG("qlen %d, qthreshold %d\n", inst->qlen, qthreshold); | |
665 | inst->qlen++; | |
666 | ||
667 | __build_packet_message(inst, skb, data_len, pf, | |
d7a5c324 | 668 | hooknum, in, out, li, prefix, plen); |
0597f268 HW |
669 | |
670 | /* timer_pending always called within inst->lock, so there | |
671 | * is no chance of a race here */ | |
672 | if (!timer_pending(&inst->timer)) { | |
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); | |
708 | if (n->pid == inst->peer_pid) | |
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, | |
1d00a4eb | 723 | struct nlmsghdr *nlh, struct nfattr *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 | ||
734 | static const int nfula_min[NFULA_MAX] = { | |
735 | [NFULA_PACKET_HDR-1] = sizeof(struct nfulnl_msg_packet_hdr), | |
736 | [NFULA_MARK-1] = sizeof(u_int32_t), | |
737 | [NFULA_TIMESTAMP-1] = sizeof(struct nfulnl_msg_packet_timestamp), | |
738 | [NFULA_IFINDEX_INDEV-1] = sizeof(u_int32_t), | |
739 | [NFULA_IFINDEX_OUTDEV-1]= sizeof(u_int32_t), | |
0af5f6c1 HW |
740 | [NFULA_IFINDEX_PHYSINDEV-1] = sizeof(u_int32_t), |
741 | [NFULA_IFINDEX_PHYSOUTDEV-1] = sizeof(u_int32_t), | |
0597f268 HW |
742 | [NFULA_HWADDR-1] = sizeof(struct nfulnl_msg_packet_hw), |
743 | [NFULA_PAYLOAD-1] = 0, | |
744 | [NFULA_PREFIX-1] = 0, | |
745 | [NFULA_UID-1] = sizeof(u_int32_t), | |
0af5f6c1 HW |
746 | [NFULA_SEQ-1] = sizeof(u_int32_t), |
747 | [NFULA_SEQ_GLOBAL-1] = sizeof(u_int32_t), | |
0597f268 HW |
748 | }; |
749 | ||
750 | static const int nfula_cfg_min[NFULA_CFG_MAX] = { | |
751 | [NFULA_CFG_CMD-1] = sizeof(struct nfulnl_msg_config_cmd), | |
752 | [NFULA_CFG_MODE-1] = sizeof(struct nfulnl_msg_config_mode), | |
753 | [NFULA_CFG_TIMEOUT-1] = sizeof(u_int32_t), | |
754 | [NFULA_CFG_QTHRESH-1] = sizeof(u_int32_t), | |
755 | [NFULA_CFG_NLBUFSIZ-1] = sizeof(u_int32_t), | |
0af5f6c1 | 756 | [NFULA_CFG_FLAGS-1] = sizeof(u_int16_t), |
0597f268 HW |
757 | }; |
758 | ||
759 | static int | |
760 | nfulnl_recv_config(struct sock *ctnl, struct sk_buff *skb, | |
1d00a4eb | 761 | struct nlmsghdr *nlh, struct nfattr *nfula[]) |
0597f268 HW |
762 | { |
763 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); | |
764 | u_int16_t group_num = ntohs(nfmsg->res_id); | |
765 | struct nfulnl_instance *inst; | |
766 | int ret = 0; | |
767 | ||
768 | UDEBUG("entering for msg %u\n", NFNL_MSG_TYPE(nlh->nlmsg_type)); | |
769 | ||
770 | if (nfattr_bad_size(nfula, NFULA_CFG_MAX, nfula_cfg_min)) { | |
771 | UDEBUG("bad attribute size\n"); | |
772 | return -EINVAL; | |
773 | } | |
774 | ||
775 | inst = instance_lookup_get(group_num); | |
776 | if (nfula[NFULA_CFG_CMD-1]) { | |
777 | u_int8_t pf = nfmsg->nfgen_family; | |
778 | struct nfulnl_msg_config_cmd *cmd; | |
779 | cmd = NFA_DATA(nfula[NFULA_CFG_CMD-1]); | |
780 | UDEBUG("found CFG_CMD for\n"); | |
781 | ||
782 | switch (cmd->command) { | |
783 | case NFULNL_CFG_CMD_BIND: | |
784 | if (inst) { | |
785 | ret = -EBUSY; | |
786 | goto out_put; | |
787 | } | |
788 | ||
789 | inst = instance_create(group_num, | |
790 | NETLINK_CB(skb).pid); | |
791 | if (!inst) { | |
792 | ret = -EINVAL; | |
f414c16c | 793 | goto out; |
0597f268 HW |
794 | } |
795 | break; | |
796 | case NFULNL_CFG_CMD_UNBIND: | |
797 | if (!inst) { | |
798 | ret = -ENODEV; | |
f414c16c | 799 | goto out; |
0597f268 HW |
800 | } |
801 | ||
802 | if (inst->peer_pid != NETLINK_CB(skb).pid) { | |
803 | ret = -EPERM; | |
804 | goto out_put; | |
805 | } | |
806 | ||
807 | instance_destroy(inst); | |
9a36e8c2 | 808 | goto out; |
0597f268 HW |
809 | case NFULNL_CFG_CMD_PF_BIND: |
810 | UDEBUG("registering log handler for pf=%u\n", pf); | |
811 | ret = nf_log_register(pf, &nfulnl_logger); | |
812 | break; | |
813 | case NFULNL_CFG_CMD_PF_UNBIND: | |
814 | UDEBUG("unregistering log handler for pf=%u\n", pf); | |
815 | /* This is a bug and a feature. We cannot unregister | |
816 | * other handlers, like nfnetlink_inst can */ | |
817 | nf_log_unregister_pf(pf); | |
818 | break; | |
819 | default: | |
820 | ret = -EINVAL; | |
821 | break; | |
822 | } | |
dd16704e MM |
823 | |
824 | if (!inst) | |
825 | goto out; | |
0597f268 HW |
826 | } else { |
827 | if (!inst) { | |
828 | UDEBUG("no config command, and no instance for " | |
829 | "group=%u pid=%u =>ENOENT\n", | |
830 | group_num, NETLINK_CB(skb).pid); | |
831 | ret = -ENOENT; | |
f414c16c | 832 | goto out; |
0597f268 HW |
833 | } |
834 | ||
835 | if (inst->peer_pid != NETLINK_CB(skb).pid) { | |
836 | UDEBUG("no config command, and wrong pid\n"); | |
837 | ret = -EPERM; | |
838 | goto out_put; | |
839 | } | |
840 | } | |
841 | ||
842 | if (nfula[NFULA_CFG_MODE-1]) { | |
843 | struct nfulnl_msg_config_mode *params; | |
844 | params = NFA_DATA(nfula[NFULA_CFG_MODE-1]); | |
845 | ||
846 | nfulnl_set_mode(inst, params->copy_mode, | |
d1208b99 | 847 | ntohl(params->copy_range)); |
0597f268 HW |
848 | } |
849 | ||
850 | if (nfula[NFULA_CFG_TIMEOUT-1]) { | |
98a4a861 AV |
851 | __be32 timeout = |
852 | *(__be32 *)NFA_DATA(nfula[NFULA_CFG_TIMEOUT-1]); | |
0597f268 HW |
853 | |
854 | nfulnl_set_timeout(inst, ntohl(timeout)); | |
855 | } | |
856 | ||
857 | if (nfula[NFULA_CFG_NLBUFSIZ-1]) { | |
98a4a861 AV |
858 | __be32 nlbufsiz = |
859 | *(__be32 *)NFA_DATA(nfula[NFULA_CFG_NLBUFSIZ-1]); | |
0597f268 HW |
860 | |
861 | nfulnl_set_nlbufsiz(inst, ntohl(nlbufsiz)); | |
862 | } | |
863 | ||
864 | if (nfula[NFULA_CFG_QTHRESH-1]) { | |
7ac00a24 AV |
865 | __be32 qthresh = |
866 | *(__be32 *)NFA_DATA(nfula[NFULA_CFG_QTHRESH-1]); | |
0597f268 HW |
867 | |
868 | nfulnl_set_qthresh(inst, ntohl(qthresh)); | |
869 | } | |
870 | ||
0af5f6c1 | 871 | if (nfula[NFULA_CFG_FLAGS-1]) { |
98a4a861 AV |
872 | __be16 flags = |
873 | *(__be16 *)NFA_DATA(nfula[NFULA_CFG_FLAGS-1]); | |
ee433530 | 874 | nfulnl_set_flags(inst, ntohs(flags)); |
0af5f6c1 HW |
875 | } |
876 | ||
0597f268 HW |
877 | out_put: |
878 | instance_put(inst); | |
dd16704e | 879 | out: |
0597f268 HW |
880 | return ret; |
881 | } | |
882 | ||
883 | static struct nfnl_callback nfulnl_cb[NFULNL_MSG_MAX] = { | |
884 | [NFULNL_MSG_PACKET] = { .call = nfulnl_recv_unsupp, | |
37d2e7a2 | 885 | .attr_count = NFULA_MAX, }, |
0597f268 | 886 | [NFULNL_MSG_CONFIG] = { .call = nfulnl_recv_config, |
37d2e7a2 | 887 | .attr_count = NFULA_CFG_MAX, }, |
0597f268 HW |
888 | }; |
889 | ||
890 | static struct nfnetlink_subsystem nfulnl_subsys = { | |
891 | .name = "log", | |
892 | .subsys_id = NFNL_SUBSYS_ULOG, | |
893 | .cb_count = NFULNL_MSG_MAX, | |
0597f268 HW |
894 | .cb = nfulnl_cb, |
895 | }; | |
896 | ||
897 | #ifdef CONFIG_PROC_FS | |
898 | struct iter_state { | |
899 | unsigned int bucket; | |
900 | }; | |
901 | ||
f76cdcee | 902 | static struct hlist_node *get_first(struct iter_state *st) |
0597f268 | 903 | { |
0597f268 HW |
904 | if (!st) |
905 | return NULL; | |
906 | ||
907 | for (st->bucket = 0; st->bucket < INSTANCE_BUCKETS; st->bucket++) { | |
908 | if (!hlist_empty(&instance_table[st->bucket])) | |
909 | return instance_table[st->bucket].first; | |
910 | } | |
911 | return NULL; | |
912 | } | |
913 | ||
f76cdcee | 914 | static struct hlist_node *get_next(struct iter_state *st, struct hlist_node *h) |
0597f268 | 915 | { |
0597f268 HW |
916 | h = h->next; |
917 | while (!h) { | |
918 | if (++st->bucket >= INSTANCE_BUCKETS) | |
919 | return NULL; | |
920 | ||
921 | h = instance_table[st->bucket].first; | |
922 | } | |
923 | return h; | |
924 | } | |
925 | ||
f76cdcee | 926 | static struct hlist_node *get_idx(struct iter_state *st, loff_t pos) |
0597f268 HW |
927 | { |
928 | struct hlist_node *head; | |
f76cdcee | 929 | head = get_first(st); |
0597f268 HW |
930 | |
931 | if (head) | |
f76cdcee | 932 | while (pos && (head = get_next(st, head))) |
0597f268 HW |
933 | pos--; |
934 | return pos ? NULL : head; | |
935 | } | |
936 | ||
937 | static void *seq_start(struct seq_file *seq, loff_t *pos) | |
938 | { | |
939 | read_lock_bh(&instances_lock); | |
f76cdcee | 940 | return get_idx(seq->private, *pos); |
0597f268 HW |
941 | } |
942 | ||
943 | static void *seq_next(struct seq_file *s, void *v, loff_t *pos) | |
944 | { | |
945 | (*pos)++; | |
f76cdcee | 946 | return get_next(s->private, v); |
0597f268 HW |
947 | } |
948 | ||
949 | static void seq_stop(struct seq_file *s, void *v) | |
950 | { | |
951 | read_unlock_bh(&instances_lock); | |
952 | } | |
953 | ||
954 | static int seq_show(struct seq_file *s, void *v) | |
955 | { | |
956 | const struct nfulnl_instance *inst = v; | |
957 | ||
601e68e1 | 958 | return seq_printf(s, "%5d %6d %5d %1d %5d %6d %2d\n", |
0597f268 | 959 | inst->group_num, |
601e68e1 | 960 | inst->peer_pid, inst->qlen, |
0597f268 HW |
961 | inst->copy_mode, inst->copy_range, |
962 | inst->flushtimeout, atomic_read(&inst->use)); | |
963 | } | |
964 | ||
56b3d975 | 965 | static const struct seq_operations nful_seq_ops = { |
0597f268 HW |
966 | .start = seq_start, |
967 | .next = seq_next, | |
968 | .stop = seq_stop, | |
969 | .show = seq_show, | |
970 | }; | |
971 | ||
972 | static int nful_open(struct inode *inode, struct file *file) | |
973 | { | |
974 | struct seq_file *seq; | |
975 | struct iter_state *is; | |
976 | int ret; | |
977 | ||
10dfdc69 | 978 | is = kzalloc(sizeof(*is), GFP_KERNEL); |
0597f268 HW |
979 | if (!is) |
980 | return -ENOMEM; | |
0597f268 HW |
981 | ret = seq_open(file, &nful_seq_ops); |
982 | if (ret < 0) | |
983 | goto out_free; | |
984 | seq = file->private_data; | |
985 | seq->private = is; | |
986 | return ret; | |
987 | out_free: | |
988 | kfree(is); | |
989 | return ret; | |
990 | } | |
991 | ||
da7071d7 | 992 | static const struct file_operations nful_file_ops = { |
0597f268 HW |
993 | .owner = THIS_MODULE, |
994 | .open = nful_open, | |
995 | .read = seq_read, | |
996 | .llseek = seq_lseek, | |
997 | .release = seq_release_private, | |
998 | }; | |
999 | ||
1000 | #endif /* PROC_FS */ | |
1001 | ||
32292a7f | 1002 | static int __init nfnetlink_log_init(void) |
0597f268 HW |
1003 | { |
1004 | int i, status = -ENOMEM; | |
1005 | #ifdef CONFIG_PROC_FS | |
1006 | struct proc_dir_entry *proc_nful; | |
1007 | #endif | |
601e68e1 | 1008 | |
0597f268 HW |
1009 | for (i = 0; i < INSTANCE_BUCKETS; i++) |
1010 | INIT_HLIST_HEAD(&instance_table[i]); | |
601e68e1 | 1011 | |
0597f268 HW |
1012 | /* it's not really all that important to have a random value, so |
1013 | * we can do this from the init function, even if there hasn't | |
1014 | * been that much entropy yet */ | |
1015 | get_random_bytes(&hash_init, sizeof(hash_init)); | |
1016 | ||
1017 | netlink_register_notifier(&nfulnl_rtnl_notifier); | |
1018 | status = nfnetlink_subsys_register(&nfulnl_subsys); | |
1019 | if (status < 0) { | |
1020 | printk(KERN_ERR "log: failed to create netlink socket\n"); | |
1021 | goto cleanup_netlink_notifier; | |
1022 | } | |
1023 | ||
1024 | #ifdef CONFIG_PROC_FS | |
1025 | proc_nful = create_proc_entry("nfnetlink_log", 0440, | |
1026 | proc_net_netfilter); | |
1027 | if (!proc_nful) | |
1028 | goto cleanup_subsys; | |
1029 | proc_nful->proc_fops = &nful_file_ops; | |
1030 | #endif | |
0597f268 HW |
1031 | return status; |
1032 | ||
0597f268 | 1033 | #ifdef CONFIG_PROC_FS |
0597f268 | 1034 | cleanup_subsys: |
0597f268 | 1035 | nfnetlink_subsys_unregister(&nfulnl_subsys); |
32292a7f | 1036 | #endif |
0597f268 HW |
1037 | cleanup_netlink_notifier: |
1038 | netlink_unregister_notifier(&nfulnl_rtnl_notifier); | |
1039 | return status; | |
1040 | } | |
1041 | ||
65b4b4e8 | 1042 | static void __exit nfnetlink_log_fini(void) |
0597f268 | 1043 | { |
e92ad99c | 1044 | nf_log_unregister(&nfulnl_logger); |
32292a7f PM |
1045 | #ifdef CONFIG_PROC_FS |
1046 | remove_proc_entry("nfnetlink_log", proc_net_netfilter); | |
1047 | #endif | |
1048 | nfnetlink_subsys_unregister(&nfulnl_subsys); | |
1049 | netlink_unregister_notifier(&nfulnl_rtnl_notifier); | |
0597f268 HW |
1050 | } |
1051 | ||
1052 | MODULE_DESCRIPTION("netfilter userspace logging"); | |
1053 | MODULE_AUTHOR("Harald Welte <laforge@netfilter.org>"); | |
1054 | MODULE_LICENSE("GPL"); | |
f682faef | 1055 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_ULOG); |
0597f268 | 1056 | |
65b4b4e8 AM |
1057 | module_init(nfnetlink_log_init); |
1058 | module_exit(nfnetlink_log_fini); |