]>
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> | |
5a0e3ad6 | 31 | #include <linux/slab.h> |
0597f268 | 32 | #include <net/sock.h> |
f01ffbd6 | 33 | #include <net/netfilter/nf_log.h> |
d9e15007 | 34 | #include <net/netfilter/nfnetlink_log.h> |
0597f268 HW |
35 | |
36 | #include <asm/atomic.h> | |
37 | ||
fbcd923c HW |
38 | #ifdef CONFIG_BRIDGE_NETFILTER |
39 | #include "../bridge/br_private.h" | |
40 | #endif | |
41 | ||
c2db2924 | 42 | #define NFULNL_NLBUFSIZ_DEFAULT NLMSG_GOODSIZE |
2c6764b7 | 43 | #define NFULNL_TIMEOUT_DEFAULT 100 /* every second */ |
0597f268 | 44 | #define NFULNL_QTHRESH_DEFAULT 100 /* 100 packets */ |
6b6ec99a | 45 | #define NFULNL_COPY_RANGE_MAX 0xFFFF /* max packet size is limited by 16-bit struct nfattr nfa_len field */ |
0597f268 HW |
46 | |
47 | #define PRINTR(x, args...) do { if (net_ratelimit()) \ | |
48 | printk(x, ## args); } while (0); | |
49 | ||
0597f268 HW |
50 | struct nfulnl_instance { |
51 | struct hlist_node hlist; /* global list of instances */ | |
52 | spinlock_t lock; | |
53 | atomic_t use; /* use count */ | |
54 | ||
55 | unsigned int qlen; /* number of nlmsgs in skb */ | |
56 | struct sk_buff *skb; /* pre-allocatd skb */ | |
0597f268 HW |
57 | struct timer_list timer; |
58 | int peer_pid; /* PID of the peer process */ | |
59 | ||
60 | /* configurable parameters */ | |
61 | unsigned int flushtimeout; /* timeout until queue flush */ | |
62 | unsigned int nlbufsiz; /* netlink buffer allocation size */ | |
63 | unsigned int qthreshold; /* threshold of the queue */ | |
64 | u_int32_t copy_range; | |
0af5f6c1 | 65 | u_int32_t seq; /* instance-local sequential counter */ |
0597f268 | 66 | u_int16_t group_num; /* number of this queue */ |
0af5f6c1 | 67 | u_int16_t flags; |
601e68e1 | 68 | u_int8_t copy_mode; |
0597f268 HW |
69 | }; |
70 | ||
71 | static DEFINE_RWLOCK(instances_lock); | |
0af5f6c1 | 72 | static atomic_t global_seq; |
0597f268 HW |
73 | |
74 | #define INSTANCE_BUCKETS 16 | |
75 | static struct hlist_head instance_table[INSTANCE_BUCKETS]; | |
76 | static unsigned int hash_init; | |
77 | ||
78 | static inline u_int8_t instance_hashfn(u_int16_t group_num) | |
79 | { | |
80 | return ((group_num & 0xff) % INSTANCE_BUCKETS); | |
81 | } | |
82 | ||
83 | static struct nfulnl_instance * | |
84 | __instance_lookup(u_int16_t group_num) | |
85 | { | |
86 | struct hlist_head *head; | |
87 | struct hlist_node *pos; | |
88 | struct nfulnl_instance *inst; | |
89 | ||
0597f268 HW |
90 | head = &instance_table[instance_hashfn(group_num)]; |
91 | hlist_for_each_entry(inst, pos, head, hlist) { | |
92 | if (inst->group_num == group_num) | |
93 | return inst; | |
94 | } | |
95 | return NULL; | |
96 | } | |
97 | ||
98 | static inline void | |
99 | instance_get(struct nfulnl_instance *inst) | |
100 | { | |
101 | atomic_inc(&inst->use); | |
102 | } | |
103 | ||
104 | static struct nfulnl_instance * | |
105 | instance_lookup_get(u_int16_t group_num) | |
106 | { | |
107 | struct nfulnl_instance *inst; | |
108 | ||
109 | read_lock_bh(&instances_lock); | |
110 | inst = __instance_lookup(group_num); | |
111 | if (inst) | |
112 | instance_get(inst); | |
113 | read_unlock_bh(&instances_lock); | |
114 | ||
115 | return inst; | |
116 | } | |
117 | ||
118 | static void | |
119 | instance_put(struct nfulnl_instance *inst) | |
120 | { | |
121 | if (inst && atomic_dec_and_test(&inst->use)) { | |
0597f268 | 122 | kfree(inst); |
7d90e86d | 123 | module_put(THIS_MODULE); |
0597f268 HW |
124 | } |
125 | } | |
126 | ||
127 | static void nfulnl_timer(unsigned long data); | |
128 | ||
129 | static struct nfulnl_instance * | |
130 | instance_create(u_int16_t group_num, int pid) | |
131 | { | |
132 | struct nfulnl_instance *inst; | |
baab2ce7 | 133 | int err; |
0597f268 | 134 | |
601e68e1 | 135 | write_lock_bh(&instances_lock); |
0597f268 | 136 | if (__instance_lookup(group_num)) { |
baab2ce7 | 137 | err = -EEXIST; |
0597f268 HW |
138 | goto out_unlock; |
139 | } | |
140 | ||
10dfdc69 | 141 | inst = kzalloc(sizeof(*inst), GFP_ATOMIC); |
baab2ce7 PM |
142 | if (!inst) { |
143 | err = -ENOMEM; | |
0597f268 | 144 | goto out_unlock; |
baab2ce7 | 145 | } |
0597f268 | 146 | |
aace57e0 MM |
147 | if (!try_module_get(THIS_MODULE)) { |
148 | kfree(inst); | |
baab2ce7 | 149 | err = -EAGAIN; |
aace57e0 MM |
150 | goto out_unlock; |
151 | } | |
152 | ||
0597f268 | 153 | INIT_HLIST_NODE(&inst->hlist); |
181a46a5 | 154 | spin_lock_init(&inst->lock); |
0597f268 HW |
155 | /* needs to be two, since we _put() after creation */ |
156 | atomic_set(&inst->use, 2); | |
157 | ||
e6f689db | 158 | setup_timer(&inst->timer, nfulnl_timer, (unsigned long)inst); |
0597f268 HW |
159 | |
160 | inst->peer_pid = pid; | |
161 | inst->group_num = group_num; | |
162 | ||
163 | inst->qthreshold = NFULNL_QTHRESH_DEFAULT; | |
164 | inst->flushtimeout = NFULNL_TIMEOUT_DEFAULT; | |
165 | inst->nlbufsiz = NFULNL_NLBUFSIZ_DEFAULT; | |
166 | inst->copy_mode = NFULNL_COPY_PACKET; | |
6b6ec99a | 167 | inst->copy_range = NFULNL_COPY_RANGE_MAX; |
0597f268 | 168 | |
601e68e1 | 169 | hlist_add_head(&inst->hlist, |
0597f268 HW |
170 | &instance_table[instance_hashfn(group_num)]); |
171 | ||
0597f268 HW |
172 | write_unlock_bh(&instances_lock); |
173 | ||
174 | return inst; | |
175 | ||
0597f268 HW |
176 | out_unlock: |
177 | write_unlock_bh(&instances_lock); | |
baab2ce7 | 178 | return ERR_PTR(err); |
0597f268 HW |
179 | } |
180 | ||
e3567061 | 181 | static void __nfulnl_flush(struct nfulnl_instance *inst); |
0597f268 HW |
182 | |
183 | static void | |
9afdb00c | 184 | __instance_destroy(struct nfulnl_instance *inst) |
0597f268 HW |
185 | { |
186 | /* first pull it out of the global list */ | |
0597f268 HW |
187 | hlist_del(&inst->hlist); |
188 | ||
0597f268 HW |
189 | /* then flush all pending packets from skb */ |
190 | ||
191 | spin_lock_bh(&inst->lock); | |
e3567061 MM |
192 | if (inst->skb) |
193 | __nfulnl_flush(inst); | |
0597f268 HW |
194 | spin_unlock_bh(&inst->lock); |
195 | ||
196 | /* and finally put the refcount */ | |
197 | instance_put(inst); | |
0597f268 HW |
198 | } |
199 | ||
0597f268 HW |
200 | static inline void |
201 | instance_destroy(struct nfulnl_instance *inst) | |
202 | { | |
9afdb00c PM |
203 | write_lock_bh(&instances_lock); |
204 | __instance_destroy(inst); | |
205 | write_unlock_bh(&instances_lock); | |
0597f268 HW |
206 | } |
207 | ||
208 | static int | |
209 | nfulnl_set_mode(struct nfulnl_instance *inst, u_int8_t mode, | |
210 | unsigned int range) | |
211 | { | |
212 | int status = 0; | |
213 | ||
214 | spin_lock_bh(&inst->lock); | |
601e68e1 | 215 | |
0597f268 HW |
216 | switch (mode) { |
217 | case NFULNL_COPY_NONE: | |
218 | case NFULNL_COPY_META: | |
219 | inst->copy_mode = mode; | |
220 | inst->copy_range = 0; | |
221 | break; | |
601e68e1 | 222 | |
0597f268 HW |
223 | case NFULNL_COPY_PACKET: |
224 | inst->copy_mode = mode; | |
6b6ec99a MM |
225 | inst->copy_range = min_t(unsigned int, |
226 | range, NFULNL_COPY_RANGE_MAX); | |
0597f268 | 227 | break; |
601e68e1 | 228 | |
0597f268 HW |
229 | default: |
230 | status = -EINVAL; | |
231 | break; | |
232 | } | |
233 | ||
234 | spin_unlock_bh(&inst->lock); | |
235 | ||
236 | return status; | |
237 | } | |
238 | ||
239 | static int | |
240 | nfulnl_set_nlbufsiz(struct nfulnl_instance *inst, u_int32_t nlbufsiz) | |
241 | { | |
242 | int status; | |
243 | ||
244 | spin_lock_bh(&inst->lock); | |
245 | if (nlbufsiz < NFULNL_NLBUFSIZ_DEFAULT) | |
246 | status = -ERANGE; | |
247 | else if (nlbufsiz > 131072) | |
248 | status = -ERANGE; | |
249 | else { | |
250 | inst->nlbufsiz = nlbufsiz; | |
251 | status = 0; | |
252 | } | |
253 | spin_unlock_bh(&inst->lock); | |
254 | ||
255 | return status; | |
256 | } | |
257 | ||
258 | static int | |
259 | nfulnl_set_timeout(struct nfulnl_instance *inst, u_int32_t timeout) | |
260 | { | |
261 | spin_lock_bh(&inst->lock); | |
262 | inst->flushtimeout = timeout; | |
263 | spin_unlock_bh(&inst->lock); | |
264 | ||
265 | return 0; | |
266 | } | |
267 | ||
268 | static int | |
269 | nfulnl_set_qthresh(struct nfulnl_instance *inst, u_int32_t qthresh) | |
270 | { | |
271 | spin_lock_bh(&inst->lock); | |
272 | inst->qthreshold = qthresh; | |
273 | spin_unlock_bh(&inst->lock); | |
274 | ||
275 | return 0; | |
276 | } | |
277 | ||
0af5f6c1 HW |
278 | static int |
279 | nfulnl_set_flags(struct nfulnl_instance *inst, u_int16_t flags) | |
280 | { | |
281 | spin_lock_bh(&inst->lock); | |
ee433530 | 282 | inst->flags = flags; |
0af5f6c1 HW |
283 | spin_unlock_bh(&inst->lock); |
284 | ||
285 | return 0; | |
286 | } | |
287 | ||
c6a8f648 MM |
288 | static struct sk_buff * |
289 | nfulnl_alloc_skb(unsigned int inst_size, unsigned int pkt_size) | |
0597f268 HW |
290 | { |
291 | struct sk_buff *skb; | |
ad2ad0f9 | 292 | unsigned int n; |
0597f268 | 293 | |
0597f268 HW |
294 | /* alloc skb which should be big enough for a whole multipart |
295 | * message. WARNING: has to be <= 128k due to slab restrictions */ | |
296 | ||
ad2ad0f9 PM |
297 | n = max(inst_size, pkt_size); |
298 | skb = alloc_skb(n, GFP_ATOMIC); | |
0597f268 | 299 | if (!skb) { |
654d0fbd | 300 | pr_notice("nfnetlink_log: can't alloc whole buffer (%u bytes)\n", |
0597f268 HW |
301 | inst_size); |
302 | ||
ad2ad0f9 PM |
303 | if (n > pkt_size) { |
304 | /* try to allocate only as much as we need for current | |
305 | * packet */ | |
0597f268 | 306 | |
ad2ad0f9 PM |
307 | skb = alloc_skb(pkt_size, GFP_ATOMIC); |
308 | if (!skb) | |
654d0fbd | 309 | pr_err("nfnetlink_log: can't even alloc %u " |
ad2ad0f9 PM |
310 | "bytes\n", pkt_size); |
311 | } | |
0597f268 HW |
312 | } |
313 | ||
314 | return skb; | |
315 | } | |
316 | ||
317 | static int | |
318 | __nfulnl_send(struct nfulnl_instance *inst) | |
319 | { | |
29c5d4af | 320 | int status = -1; |
0597f268 | 321 | |
0597f268 | 322 | if (inst->qlen > 1) |
29c5d4af EL |
323 | NLMSG_PUT(inst->skb, 0, 0, |
324 | NLMSG_DONE, | |
325 | sizeof(struct nfgenmsg)); | |
0597f268 | 326 | |
cd8c20b6 AD |
327 | status = nfnetlink_unicast(inst->skb, &init_net, inst->peer_pid, |
328 | MSG_DONTWAIT); | |
0597f268 HW |
329 | |
330 | inst->qlen = 0; | |
331 | inst->skb = NULL; | |
0597f268 | 332 | |
29c5d4af | 333 | nlmsg_failure: |
0597f268 HW |
334 | return status; |
335 | } | |
336 | ||
e3567061 MM |
337 | static void |
338 | __nfulnl_flush(struct nfulnl_instance *inst) | |
339 | { | |
340 | /* timer holds a reference */ | |
341 | if (del_timer(&inst->timer)) | |
342 | instance_put(inst); | |
343 | if (inst->skb) | |
344 | __nfulnl_send(inst); | |
345 | } | |
346 | ||
c6a8f648 MM |
347 | static void |
348 | nfulnl_timer(unsigned long data) | |
0597f268 | 349 | { |
601e68e1 | 350 | struct nfulnl_instance *inst = (struct nfulnl_instance *)data; |
0597f268 | 351 | |
0597f268 | 352 | spin_lock_bh(&inst->lock); |
370e6a87 MM |
353 | if (inst->skb) |
354 | __nfulnl_send(inst); | |
0597f268 | 355 | spin_unlock_bh(&inst->lock); |
05f7b7b3 | 356 | instance_put(inst); |
0597f268 HW |
357 | } |
358 | ||
0af5f6c1 HW |
359 | /* This is an inline function, we don't really care about a long |
360 | * list of arguments */ | |
601e68e1 | 361 | static inline int |
0597f268 | 362 | __build_packet_message(struct nfulnl_instance *inst, |
601e68e1 | 363 | const struct sk_buff *skb, |
0597f268 | 364 | unsigned int data_len, |
76108cea | 365 | u_int8_t pf, |
0597f268 HW |
366 | unsigned int hooknum, |
367 | const struct net_device *indev, | |
368 | const struct net_device *outdev, | |
369 | const struct nf_loginfo *li, | |
d7a5c324 | 370 | const char *prefix, unsigned int plen) |
0597f268 | 371 | { |
0597f268 HW |
372 | struct nfulnl_msg_packet_hdr pmsg; |
373 | struct nlmsghdr *nlh; | |
374 | struct nfgenmsg *nfmsg; | |
98a4a861 | 375 | __be32 tmp_uint; |
27a884dc | 376 | sk_buff_data_t old_tail = inst->skb->tail; |
0597f268 | 377 | |
601e68e1 | 378 | nlh = NLMSG_PUT(inst->skb, 0, 0, |
0597f268 HW |
379 | NFNL_SUBSYS_ULOG << 8 | NFULNL_MSG_PACKET, |
380 | sizeof(struct nfgenmsg)); | |
381 | nfmsg = NLMSG_DATA(nlh); | |
382 | nfmsg->nfgen_family = pf; | |
383 | nfmsg->version = NFNETLINK_V0; | |
384 | nfmsg->res_id = htons(inst->group_num); | |
385 | ||
febf0a43 | 386 | pmsg.hw_protocol = skb->protocol; |
0597f268 HW |
387 | pmsg.hook = hooknum; |
388 | ||
df6fb868 | 389 | NLA_PUT(inst->skb, NFULA_PACKET_HDR, sizeof(pmsg), &pmsg); |
0597f268 | 390 | |
d7a5c324 | 391 | if (prefix) |
df6fb868 | 392 | NLA_PUT(inst->skb, NFULA_PREFIX, plen, prefix); |
0597f268 HW |
393 | |
394 | if (indev) { | |
fbcd923c | 395 | #ifndef CONFIG_BRIDGE_NETFILTER |
0dfedd28 PM |
396 | NLA_PUT_BE32(inst->skb, NFULA_IFINDEX_INDEV, |
397 | htonl(indev->ifindex)); | |
fbcd923c HW |
398 | #else |
399 | if (pf == PF_BRIDGE) { | |
400 | /* Case 1: outdev is physical input device, we need to | |
401 | * look for bridge group (when called from | |
402 | * netfilter_bridge) */ | |
0dfedd28 PM |
403 | NLA_PUT_BE32(inst->skb, NFULA_IFINDEX_PHYSINDEV, |
404 | htonl(indev->ifindex)); | |
fbcd923c | 405 | /* this is the bridge group "brX" */ |
0dfedd28 PM |
406 | NLA_PUT_BE32(inst->skb, NFULA_IFINDEX_INDEV, |
407 | htonl(indev->br_port->br->dev->ifindex)); | |
fbcd923c HW |
408 | } else { |
409 | /* Case 2: indev is bridge group, we need to look for | |
410 | * physical device (when called from ipv4) */ | |
0dfedd28 PM |
411 | NLA_PUT_BE32(inst->skb, NFULA_IFINDEX_INDEV, |
412 | htonl(indev->ifindex)); | |
413 | if (skb->nf_bridge && skb->nf_bridge->physindev) | |
414 | NLA_PUT_BE32(inst->skb, NFULA_IFINDEX_PHYSINDEV, | |
415 | htonl(skb->nf_bridge->physindev->ifindex)); | |
fbcd923c HW |
416 | } |
417 | #endif | |
0597f268 HW |
418 | } |
419 | ||
420 | if (outdev) { | |
421 | tmp_uint = htonl(outdev->ifindex); | |
fbcd923c | 422 | #ifndef CONFIG_BRIDGE_NETFILTER |
0dfedd28 PM |
423 | NLA_PUT_BE32(inst->skb, NFULA_IFINDEX_OUTDEV, |
424 | htonl(outdev->ifindex)); | |
fbcd923c HW |
425 | #else |
426 | if (pf == PF_BRIDGE) { | |
427 | /* Case 1: outdev is physical output device, we need to | |
428 | * look for bridge group (when called from | |
429 | * netfilter_bridge) */ | |
0dfedd28 PM |
430 | NLA_PUT_BE32(inst->skb, NFULA_IFINDEX_PHYSOUTDEV, |
431 | htonl(outdev->ifindex)); | |
fbcd923c | 432 | /* this is the bridge group "brX" */ |
0dfedd28 PM |
433 | NLA_PUT_BE32(inst->skb, NFULA_IFINDEX_OUTDEV, |
434 | htonl(outdev->br_port->br->dev->ifindex)); | |
fbcd923c HW |
435 | } else { |
436 | /* Case 2: indev is a bridge group, we need to look | |
437 | * for physical device (when called from ipv4) */ | |
0dfedd28 PM |
438 | NLA_PUT_BE32(inst->skb, NFULA_IFINDEX_OUTDEV, |
439 | htonl(outdev->ifindex)); | |
440 | if (skb->nf_bridge && skb->nf_bridge->physoutdev) | |
441 | NLA_PUT_BE32(inst->skb, NFULA_IFINDEX_PHYSOUTDEV, | |
442 | htonl(skb->nf_bridge->physoutdev->ifindex)); | |
fbcd923c HW |
443 | } |
444 | #endif | |
0597f268 HW |
445 | } |
446 | ||
0dfedd28 PM |
447 | if (skb->mark) |
448 | NLA_PUT_BE32(inst->skb, NFULA_MARK, htonl(skb->mark)); | |
0597f268 | 449 | |
b95cce35 | 450 | if (indev && skb->dev) { |
0597f268 | 451 | struct nfulnl_msg_packet_hw phw; |
b95cce35 SH |
452 | int len = dev_parse_header(skb, phw.hw_addr); |
453 | if (len > 0) { | |
454 | phw.hw_addrlen = htons(len); | |
df6fb868 | 455 | NLA_PUT(inst->skb, NFULA_HWADDR, sizeof(phw), &phw); |
b95cce35 | 456 | } |
0597f268 HW |
457 | } |
458 | ||
72961ecf EL |
459 | if (indev && skb_mac_header_was_set(skb)) { |
460 | NLA_PUT_BE16(inst->skb, NFULA_HWTYPE, htons(skb->dev->type)); | |
461 | NLA_PUT_BE16(inst->skb, NFULA_HWLEN, | |
462 | htons(skb->dev->hard_header_len)); | |
463 | NLA_PUT(inst->skb, NFULA_HWHEADER, skb->dev->hard_header_len, | |
464 | skb_mac_header(skb)); | |
465 | } | |
466 | ||
b7aa0bf7 | 467 | if (skb->tstamp.tv64) { |
0597f268 | 468 | struct nfulnl_msg_packet_timestamp ts; |
b7aa0bf7 ED |
469 | struct timeval tv = ktime_to_timeval(skb->tstamp); |
470 | ts.sec = cpu_to_be64(tv.tv_sec); | |
471 | ts.usec = cpu_to_be64(tv.tv_usec); | |
0597f268 | 472 | |
df6fb868 | 473 | NLA_PUT(inst->skb, NFULA_TIMESTAMP, sizeof(ts), &ts); |
0597f268 HW |
474 | } |
475 | ||
476 | /* UID */ | |
477 | if (skb->sk) { | |
478 | read_lock_bh(&skb->sk->sk_callback_lock); | |
479 | if (skb->sk->sk_socket && skb->sk->sk_socket->file) { | |
d76b0d9b DH |
480 | struct file *file = skb->sk->sk_socket->file; |
481 | __be32 uid = htonl(file->f_cred->fsuid); | |
482 | __be32 gid = htonl(file->f_cred->fsgid); | |
df6fb868 | 483 | /* need to unlock here since NLA_PUT may goto */ |
0597f268 | 484 | read_unlock_bh(&skb->sk->sk_callback_lock); |
0dfedd28 | 485 | NLA_PUT_BE32(inst->skb, NFULA_UID, uid); |
76aa1ce1 | 486 | NLA_PUT_BE32(inst->skb, NFULA_GID, gid); |
0597f268 HW |
487 | } else |
488 | read_unlock_bh(&skb->sk->sk_callback_lock); | |
489 | } | |
490 | ||
0af5f6c1 | 491 | /* local sequence number */ |
0dfedd28 PM |
492 | if (inst->flags & NFULNL_CFG_F_SEQ) |
493 | NLA_PUT_BE32(inst->skb, NFULA_SEQ, htonl(inst->seq++)); | |
494 | ||
0af5f6c1 | 495 | /* global sequence number */ |
0dfedd28 PM |
496 | if (inst->flags & NFULNL_CFG_F_SEQ_GLOBAL) |
497 | NLA_PUT_BE32(inst->skb, NFULA_SEQ_GLOBAL, | |
498 | htonl(atomic_inc_return(&global_seq))); | |
0af5f6c1 | 499 | |
0597f268 | 500 | if (data_len) { |
df6fb868 PM |
501 | struct nlattr *nla; |
502 | int size = nla_attr_size(data_len); | |
0597f268 | 503 | |
df6fb868 | 504 | if (skb_tailroom(inst->skb) < nla_total_size(data_len)) { |
0597f268 HW |
505 | printk(KERN_WARNING "nfnetlink_log: no tailroom!\n"); |
506 | goto nlmsg_failure; | |
507 | } | |
508 | ||
df6fb868 PM |
509 | nla = (struct nlattr *)skb_put(inst->skb, nla_total_size(data_len)); |
510 | nla->nla_type = NFULA_PAYLOAD; | |
511 | nla->nla_len = size; | |
0597f268 | 512 | |
df6fb868 | 513 | if (skb_copy_bits(skb, 0, nla_data(nla), data_len)) |
0597f268 HW |
514 | BUG(); |
515 | } | |
601e68e1 | 516 | |
0597f268 HW |
517 | nlh->nlmsg_len = inst->skb->tail - old_tail; |
518 | return 0; | |
519 | ||
520 | nlmsg_failure: | |
df6fb868 | 521 | nla_put_failure: |
0597f268 HW |
522 | PRINTR(KERN_ERR "nfnetlink_log: error creating log nlmsg\n"); |
523 | return -1; | |
524 | } | |
525 | ||
526 | #define RCV_SKB_FAIL(err) do { netlink_ack(skb, nlh, (err)); return; } while (0) | |
527 | ||
528 | static struct nf_loginfo default_loginfo = { | |
529 | .type = NF_LOG_TYPE_ULOG, | |
530 | .u = { | |
531 | .ulog = { | |
532 | .copy_len = 0xffff, | |
533 | .group = 0, | |
534 | .qthreshold = 1, | |
535 | }, | |
536 | }, | |
537 | }; | |
538 | ||
539 | /* log handler for internal netfilter logging api */ | |
5f7340ef | 540 | void |
76108cea | 541 | nfulnl_log_packet(u_int8_t pf, |
0597f268 HW |
542 | unsigned int hooknum, |
543 | const struct sk_buff *skb, | |
544 | const struct net_device *in, | |
545 | const struct net_device *out, | |
546 | const struct nf_loginfo *li_user, | |
547 | const char *prefix) | |
548 | { | |
549 | unsigned int size, data_len; | |
550 | struct nfulnl_instance *inst; | |
551 | const struct nf_loginfo *li; | |
552 | unsigned int qthreshold; | |
d7a5c324 | 553 | unsigned int plen; |
0597f268 | 554 | |
601e68e1 | 555 | if (li_user && li_user->type == NF_LOG_TYPE_ULOG) |
0597f268 HW |
556 | li = li_user; |
557 | else | |
558 | li = &default_loginfo; | |
559 | ||
560 | inst = instance_lookup_get(li->u.ulog.group); | |
561 | if (!inst) | |
0597f268 | 562 | return; |
0597f268 | 563 | |
d7a5c324 PM |
564 | plen = 0; |
565 | if (prefix) | |
881dbfe8 | 566 | plen = strlen(prefix) + 1; |
d7a5c324 | 567 | |
0597f268 HW |
568 | /* FIXME: do we want to make the size calculation conditional based on |
569 | * what is actually present? way more branches and checks, but more | |
570 | * memory efficient... */ | |
7000d38d | 571 | size = NLMSG_SPACE(sizeof(struct nfgenmsg)) |
df6fb868 PM |
572 | + nla_total_size(sizeof(struct nfulnl_msg_packet_hdr)) |
573 | + nla_total_size(sizeof(u_int32_t)) /* ifindex */ | |
574 | + nla_total_size(sizeof(u_int32_t)) /* ifindex */ | |
fbcd923c | 575 | #ifdef CONFIG_BRIDGE_NETFILTER |
df6fb868 PM |
576 | + nla_total_size(sizeof(u_int32_t)) /* ifindex */ |
577 | + nla_total_size(sizeof(u_int32_t)) /* ifindex */ | |
fbcd923c | 578 | #endif |
df6fb868 PM |
579 | + nla_total_size(sizeof(u_int32_t)) /* mark */ |
580 | + nla_total_size(sizeof(u_int32_t)) /* uid */ | |
76aa1ce1 | 581 | + nla_total_size(sizeof(u_int32_t)) /* gid */ |
df6fb868 PM |
582 | + nla_total_size(plen) /* prefix */ |
583 | + nla_total_size(sizeof(struct nfulnl_msg_packet_hw)) | |
584 | + nla_total_size(sizeof(struct nfulnl_msg_packet_timestamp)); | |
0597f268 | 585 | |
eeff9bee PNA |
586 | if (in && skb_mac_header_was_set(skb)) { |
587 | size += nla_total_size(skb->dev->hard_header_len) | |
588 | + nla_total_size(sizeof(u_int16_t)) /* hwtype */ | |
589 | + nla_total_size(sizeof(u_int16_t)); /* hwlen */ | |
590 | } | |
591 | ||
0597f268 HW |
592 | spin_lock_bh(&inst->lock); |
593 | ||
0af5f6c1 | 594 | if (inst->flags & NFULNL_CFG_F_SEQ) |
df6fb868 | 595 | size += nla_total_size(sizeof(u_int32_t)); |
0af5f6c1 | 596 | if (inst->flags & NFULNL_CFG_F_SEQ_GLOBAL) |
df6fb868 | 597 | size += nla_total_size(sizeof(u_int32_t)); |
0af5f6c1 | 598 | |
0597f268 HW |
599 | qthreshold = inst->qthreshold; |
600 | /* per-rule qthreshold overrides per-instance */ | |
5ca431f9 EL |
601 | if (li->u.ulog.qthreshold) |
602 | if (qthreshold > li->u.ulog.qthreshold) | |
603 | qthreshold = li->u.ulog.qthreshold; | |
604 | ||
601e68e1 | 605 | |
0597f268 HW |
606 | switch (inst->copy_mode) { |
607 | case NFULNL_COPY_META: | |
608 | case NFULNL_COPY_NONE: | |
609 | data_len = 0; | |
610 | break; | |
601e68e1 | 611 | |
0597f268 | 612 | case NFULNL_COPY_PACKET: |
601e68e1 | 613 | if (inst->copy_range == 0 |
0597f268 HW |
614 | || inst->copy_range > skb->len) |
615 | data_len = skb->len; | |
616 | else | |
617 | data_len = inst->copy_range; | |
601e68e1 | 618 | |
df6fb868 | 619 | size += nla_total_size(data_len); |
0597f268 | 620 | break; |
601e68e1 | 621 | |
0597f268 | 622 | default: |
55b5a91e | 623 | goto unlock_and_release; |
0597f268 HW |
624 | } |
625 | ||
d63b043d MM |
626 | if (inst->skb && |
627 | size > skb_tailroom(inst->skb) - sizeof(struct nfgenmsg)) { | |
0597f268 HW |
628 | /* either the queue len is too high or we don't have |
629 | * enough room in the skb left. flush to userspace. */ | |
e3567061 | 630 | __nfulnl_flush(inst); |
55b5a91e | 631 | } |
0597f268 | 632 | |
55b5a91e MM |
633 | if (!inst->skb) { |
634 | inst->skb = nfulnl_alloc_skb(inst->nlbufsiz, size); | |
635 | if (!inst->skb) | |
0597f268 | 636 | goto alloc_failure; |
0597f268 HW |
637 | } |
638 | ||
0597f268 HW |
639 | inst->qlen++; |
640 | ||
641 | __build_packet_message(inst, skb, data_len, pf, | |
d7a5c324 | 642 | hooknum, in, out, li, prefix, plen); |
0597f268 | 643 | |
d63b043d MM |
644 | if (inst->qlen >= qthreshold) |
645 | __nfulnl_flush(inst); | |
0597f268 HW |
646 | /* timer_pending always called within inst->lock, so there |
647 | * is no chance of a race here */ | |
d63b043d | 648 | else if (!timer_pending(&inst->timer)) { |
0597f268 HW |
649 | instance_get(inst); |
650 | inst->timer.expires = jiffies + (inst->flushtimeout*HZ/100); | |
651 | add_timer(&inst->timer); | |
652 | } | |
0597f268 | 653 | |
ed32abea MM |
654 | unlock_and_release: |
655 | spin_unlock_bh(&inst->lock); | |
656 | instance_put(inst); | |
0597f268 HW |
657 | return; |
658 | ||
659 | alloc_failure: | |
0597f268 | 660 | /* FIXME: statistics */ |
ed32abea | 661 | goto unlock_and_release; |
0597f268 | 662 | } |
5f7340ef | 663 | EXPORT_SYMBOL_GPL(nfulnl_log_packet); |
0597f268 HW |
664 | |
665 | static int | |
666 | nfulnl_rcv_nl_event(struct notifier_block *this, | |
667 | unsigned long event, void *ptr) | |
668 | { | |
669 | struct netlink_notify *n = ptr; | |
670 | ||
dee5817e | 671 | if (event == NETLINK_URELEASE && n->protocol == NETLINK_NETFILTER) { |
0597f268 HW |
672 | int i; |
673 | ||
674 | /* destroy all instances for this pid */ | |
675 | write_lock_bh(&instances_lock); | |
676 | for (i = 0; i < INSTANCE_BUCKETS; i++) { | |
677 | struct hlist_node *tmp, *t2; | |
678 | struct nfulnl_instance *inst; | |
679 | struct hlist_head *head = &instance_table[i]; | |
680 | ||
681 | hlist_for_each_entry_safe(inst, tmp, t2, head, hlist) { | |
09ad9bc7 | 682 | if ((net_eq(n->net, &init_net)) && |
b4b51029 | 683 | (n->pid == inst->peer_pid)) |
0597f268 HW |
684 | __instance_destroy(inst); |
685 | } | |
686 | } | |
687 | write_unlock_bh(&instances_lock); | |
688 | } | |
689 | return NOTIFY_DONE; | |
690 | } | |
691 | ||
692 | static struct notifier_block nfulnl_rtnl_notifier = { | |
693 | .notifier_call = nfulnl_rcv_nl_event, | |
694 | }; | |
695 | ||
696 | static int | |
697 | nfulnl_recv_unsupp(struct sock *ctnl, struct sk_buff *skb, | |
39938324 PM |
698 | const struct nlmsghdr *nlh, |
699 | const struct nlattr * const nfqa[]) | |
0597f268 HW |
700 | { |
701 | return -ENOTSUPP; | |
702 | } | |
703 | ||
ca735b3a | 704 | static struct nf_logger nfulnl_logger __read_mostly = { |
0597f268 HW |
705 | .name = "nfnetlink_log", |
706 | .logfn = &nfulnl_log_packet, | |
707 | .me = THIS_MODULE, | |
708 | }; | |
709 | ||
fd8281ad PM |
710 | static const struct nla_policy nfula_cfg_policy[NFULA_CFG_MAX+1] = { |
711 | [NFULA_CFG_CMD] = { .len = sizeof(struct nfulnl_msg_config_cmd) }, | |
712 | [NFULA_CFG_MODE] = { .len = sizeof(struct nfulnl_msg_config_mode) }, | |
713 | [NFULA_CFG_TIMEOUT] = { .type = NLA_U32 }, | |
714 | [NFULA_CFG_QTHRESH] = { .type = NLA_U32 }, | |
715 | [NFULA_CFG_NLBUFSIZ] = { .type = NLA_U32 }, | |
716 | [NFULA_CFG_FLAGS] = { .type = NLA_U16 }, | |
0597f268 HW |
717 | }; |
718 | ||
719 | static int | |
720 | nfulnl_recv_config(struct sock *ctnl, struct sk_buff *skb, | |
39938324 PM |
721 | const struct nlmsghdr *nlh, |
722 | const struct nlattr * const nfula[]) | |
0597f268 HW |
723 | { |
724 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); | |
725 | u_int16_t group_num = ntohs(nfmsg->res_id); | |
726 | struct nfulnl_instance *inst; | |
b7047a1c | 727 | struct nfulnl_msg_config_cmd *cmd = NULL; |
0597f268 HW |
728 | int ret = 0; |
729 | ||
b7047a1c PM |
730 | if (nfula[NFULA_CFG_CMD]) { |
731 | u_int8_t pf = nfmsg->nfgen_family; | |
732 | cmd = nla_data(nfula[NFULA_CFG_CMD]); | |
733 | ||
734 | /* Commands without queue context */ | |
735 | switch (cmd->command) { | |
736 | case NFULNL_CFG_CMD_PF_BIND: | |
ca735b3a | 737 | return nf_log_bind_pf(pf, &nfulnl_logger); |
b7047a1c | 738 | case NFULNL_CFG_CMD_PF_UNBIND: |
ca735b3a | 739 | nf_log_unbind_pf(pf); |
b7047a1c PM |
740 | return 0; |
741 | } | |
742 | } | |
743 | ||
0597f268 | 744 | inst = instance_lookup_get(group_num); |
c0506365 PM |
745 | if (inst && inst->peer_pid != NETLINK_CB(skb).pid) { |
746 | ret = -EPERM; | |
747 | goto out_put; | |
748 | } | |
749 | ||
b7047a1c | 750 | if (cmd != NULL) { |
0597f268 HW |
751 | switch (cmd->command) { |
752 | case NFULNL_CFG_CMD_BIND: | |
753 | if (inst) { | |
754 | ret = -EBUSY; | |
755 | goto out_put; | |
756 | } | |
757 | ||
758 | inst = instance_create(group_num, | |
759 | NETLINK_CB(skb).pid); | |
baab2ce7 PM |
760 | if (IS_ERR(inst)) { |
761 | ret = PTR_ERR(inst); | |
f414c16c | 762 | goto out; |
0597f268 HW |
763 | } |
764 | break; | |
765 | case NFULNL_CFG_CMD_UNBIND: | |
766 | if (!inst) { | |
767 | ret = -ENODEV; | |
f414c16c | 768 | goto out; |
0597f268 HW |
769 | } |
770 | ||
0597f268 | 771 | instance_destroy(inst); |
a49c6503 | 772 | goto out_put; |
0597f268 | 773 | default: |
cd21f0ac | 774 | ret = -ENOTSUPP; |
0597f268 HW |
775 | break; |
776 | } | |
0597f268 HW |
777 | } |
778 | ||
df6fb868 | 779 | if (nfula[NFULA_CFG_MODE]) { |
0597f268 | 780 | struct nfulnl_msg_config_mode *params; |
df6fb868 | 781 | params = nla_data(nfula[NFULA_CFG_MODE]); |
0597f268 | 782 | |
c0506365 PM |
783 | if (!inst) { |
784 | ret = -ENODEV; | |
785 | goto out; | |
786 | } | |
0597f268 | 787 | nfulnl_set_mode(inst, params->copy_mode, |
d1208b99 | 788 | ntohl(params->copy_range)); |
0597f268 HW |
789 | } |
790 | ||
df6fb868 | 791 | if (nfula[NFULA_CFG_TIMEOUT]) { |
0dfedd28 | 792 | __be32 timeout = nla_get_be32(nfula[NFULA_CFG_TIMEOUT]); |
0597f268 | 793 | |
c0506365 PM |
794 | if (!inst) { |
795 | ret = -ENODEV; | |
796 | goto out; | |
797 | } | |
0597f268 HW |
798 | nfulnl_set_timeout(inst, ntohl(timeout)); |
799 | } | |
800 | ||
df6fb868 | 801 | if (nfula[NFULA_CFG_NLBUFSIZ]) { |
0dfedd28 | 802 | __be32 nlbufsiz = nla_get_be32(nfula[NFULA_CFG_NLBUFSIZ]); |
0597f268 | 803 | |
c0506365 PM |
804 | if (!inst) { |
805 | ret = -ENODEV; | |
806 | goto out; | |
807 | } | |
0597f268 HW |
808 | nfulnl_set_nlbufsiz(inst, ntohl(nlbufsiz)); |
809 | } | |
810 | ||
df6fb868 | 811 | if (nfula[NFULA_CFG_QTHRESH]) { |
0dfedd28 | 812 | __be32 qthresh = nla_get_be32(nfula[NFULA_CFG_QTHRESH]); |
0597f268 | 813 | |
c0506365 PM |
814 | if (!inst) { |
815 | ret = -ENODEV; | |
816 | goto out; | |
817 | } | |
0597f268 HW |
818 | nfulnl_set_qthresh(inst, ntohl(qthresh)); |
819 | } | |
820 | ||
df6fb868 | 821 | if (nfula[NFULA_CFG_FLAGS]) { |
0dfedd28 | 822 | __be16 flags = nla_get_be16(nfula[NFULA_CFG_FLAGS]); |
c0506365 PM |
823 | |
824 | if (!inst) { | |
825 | ret = -ENODEV; | |
826 | goto out; | |
827 | } | |
ee433530 | 828 | nfulnl_set_flags(inst, ntohs(flags)); |
0af5f6c1 HW |
829 | } |
830 | ||
0597f268 HW |
831 | out_put: |
832 | instance_put(inst); | |
dd16704e | 833 | out: |
0597f268 HW |
834 | return ret; |
835 | } | |
836 | ||
7c8d4cb4 | 837 | static const struct nfnl_callback nfulnl_cb[NFULNL_MSG_MAX] = { |
0597f268 | 838 | [NFULNL_MSG_PACKET] = { .call = nfulnl_recv_unsupp, |
37d2e7a2 | 839 | .attr_count = NFULA_MAX, }, |
0597f268 | 840 | [NFULNL_MSG_CONFIG] = { .call = nfulnl_recv_config, |
fd8281ad PM |
841 | .attr_count = NFULA_CFG_MAX, |
842 | .policy = nfula_cfg_policy }, | |
0597f268 HW |
843 | }; |
844 | ||
7c8d4cb4 | 845 | static const struct nfnetlink_subsystem nfulnl_subsys = { |
0597f268 HW |
846 | .name = "log", |
847 | .subsys_id = NFNL_SUBSYS_ULOG, | |
848 | .cb_count = NFULNL_MSG_MAX, | |
0597f268 HW |
849 | .cb = nfulnl_cb, |
850 | }; | |
851 | ||
852 | #ifdef CONFIG_PROC_FS | |
853 | struct iter_state { | |
854 | unsigned int bucket; | |
855 | }; | |
856 | ||
f76cdcee | 857 | static struct hlist_node *get_first(struct iter_state *st) |
0597f268 | 858 | { |
0597f268 HW |
859 | if (!st) |
860 | return NULL; | |
861 | ||
862 | for (st->bucket = 0; st->bucket < INSTANCE_BUCKETS; st->bucket++) { | |
863 | if (!hlist_empty(&instance_table[st->bucket])) | |
864 | return instance_table[st->bucket].first; | |
865 | } | |
866 | return NULL; | |
867 | } | |
868 | ||
f76cdcee | 869 | static struct hlist_node *get_next(struct iter_state *st, struct hlist_node *h) |
0597f268 | 870 | { |
0597f268 HW |
871 | h = h->next; |
872 | while (!h) { | |
873 | if (++st->bucket >= INSTANCE_BUCKETS) | |
874 | return NULL; | |
875 | ||
876 | h = instance_table[st->bucket].first; | |
877 | } | |
878 | return h; | |
879 | } | |
880 | ||
f76cdcee | 881 | static struct hlist_node *get_idx(struct iter_state *st, loff_t pos) |
0597f268 HW |
882 | { |
883 | struct hlist_node *head; | |
f76cdcee | 884 | head = get_first(st); |
0597f268 HW |
885 | |
886 | if (head) | |
f76cdcee | 887 | while (pos && (head = get_next(st, head))) |
0597f268 HW |
888 | pos--; |
889 | return pos ? NULL : head; | |
890 | } | |
891 | ||
892 | static void *seq_start(struct seq_file *seq, loff_t *pos) | |
4e26fe26 | 893 | __acquires(instances_lock) |
0597f268 HW |
894 | { |
895 | read_lock_bh(&instances_lock); | |
f76cdcee | 896 | return get_idx(seq->private, *pos); |
0597f268 HW |
897 | } |
898 | ||
899 | static void *seq_next(struct seq_file *s, void *v, loff_t *pos) | |
900 | { | |
901 | (*pos)++; | |
f76cdcee | 902 | return get_next(s->private, v); |
0597f268 HW |
903 | } |
904 | ||
905 | static void seq_stop(struct seq_file *s, void *v) | |
4e26fe26 | 906 | __releases(instances_lock) |
0597f268 HW |
907 | { |
908 | read_unlock_bh(&instances_lock); | |
909 | } | |
910 | ||
911 | static int seq_show(struct seq_file *s, void *v) | |
912 | { | |
913 | const struct nfulnl_instance *inst = v; | |
914 | ||
601e68e1 | 915 | return seq_printf(s, "%5d %6d %5d %1d %5d %6d %2d\n", |
0597f268 | 916 | inst->group_num, |
601e68e1 | 917 | inst->peer_pid, inst->qlen, |
0597f268 HW |
918 | inst->copy_mode, inst->copy_range, |
919 | inst->flushtimeout, atomic_read(&inst->use)); | |
920 | } | |
921 | ||
56b3d975 | 922 | static const struct seq_operations nful_seq_ops = { |
0597f268 HW |
923 | .start = seq_start, |
924 | .next = seq_next, | |
925 | .stop = seq_stop, | |
926 | .show = seq_show, | |
927 | }; | |
928 | ||
929 | static int nful_open(struct inode *inode, struct file *file) | |
930 | { | |
e2da5913 PE |
931 | return seq_open_private(file, &nful_seq_ops, |
932 | sizeof(struct iter_state)); | |
0597f268 HW |
933 | } |
934 | ||
da7071d7 | 935 | static const struct file_operations nful_file_ops = { |
0597f268 HW |
936 | .owner = THIS_MODULE, |
937 | .open = nful_open, | |
938 | .read = seq_read, | |
939 | .llseek = seq_lseek, | |
940 | .release = seq_release_private, | |
941 | }; | |
942 | ||
943 | #endif /* PROC_FS */ | |
944 | ||
32292a7f | 945 | static int __init nfnetlink_log_init(void) |
0597f268 HW |
946 | { |
947 | int i, status = -ENOMEM; | |
601e68e1 | 948 | |
0597f268 HW |
949 | for (i = 0; i < INSTANCE_BUCKETS; i++) |
950 | INIT_HLIST_HEAD(&instance_table[i]); | |
601e68e1 | 951 | |
0597f268 HW |
952 | /* it's not really all that important to have a random value, so |
953 | * we can do this from the init function, even if there hasn't | |
954 | * been that much entropy yet */ | |
955 | get_random_bytes(&hash_init, sizeof(hash_init)); | |
956 | ||
957 | netlink_register_notifier(&nfulnl_rtnl_notifier); | |
958 | status = nfnetlink_subsys_register(&nfulnl_subsys); | |
959 | if (status < 0) { | |
960 | printk(KERN_ERR "log: failed to create netlink socket\n"); | |
961 | goto cleanup_netlink_notifier; | |
962 | } | |
963 | ||
ca735b3a EL |
964 | status = nf_log_register(NFPROTO_UNSPEC, &nfulnl_logger); |
965 | if (status < 0) { | |
966 | printk(KERN_ERR "log: failed to register logger\n"); | |
967 | goto cleanup_subsys; | |
968 | } | |
969 | ||
0597f268 | 970 | #ifdef CONFIG_PROC_FS |
8eeee8b1 DL |
971 | if (!proc_create("nfnetlink_log", 0440, |
972 | proc_net_netfilter, &nful_file_ops)) | |
ca735b3a | 973 | goto cleanup_logger; |
0597f268 | 974 | #endif |
0597f268 HW |
975 | return status; |
976 | ||
0597f268 | 977 | #ifdef CONFIG_PROC_FS |
ca735b3a EL |
978 | cleanup_logger: |
979 | nf_log_unregister(&nfulnl_logger); | |
980 | #endif | |
0597f268 | 981 | cleanup_subsys: |
0597f268 HW |
982 | nfnetlink_subsys_unregister(&nfulnl_subsys); |
983 | cleanup_netlink_notifier: | |
984 | netlink_unregister_notifier(&nfulnl_rtnl_notifier); | |
985 | return status; | |
986 | } | |
987 | ||
65b4b4e8 | 988 | static void __exit nfnetlink_log_fini(void) |
0597f268 | 989 | { |
e92ad99c | 990 | nf_log_unregister(&nfulnl_logger); |
32292a7f PM |
991 | #ifdef CONFIG_PROC_FS |
992 | remove_proc_entry("nfnetlink_log", proc_net_netfilter); | |
993 | #endif | |
994 | nfnetlink_subsys_unregister(&nfulnl_subsys); | |
995 | netlink_unregister_notifier(&nfulnl_rtnl_notifier); | |
0597f268 HW |
996 | } |
997 | ||
998 | MODULE_DESCRIPTION("netfilter userspace logging"); | |
999 | MODULE_AUTHOR("Harald Welte <laforge@netfilter.org>"); | |
1000 | MODULE_LICENSE("GPL"); | |
f682faef | 1001 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_ULOG); |
0597f268 | 1002 | |
65b4b4e8 AM |
1003 | module_init(nfnetlink_log_init); |
1004 | module_exit(nfnetlink_log_fini); |