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Commit | Line | Data |
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9fb9cbb1 YK |
1 | /* (C) 1999-2001 Paul `Rusty' Russell |
2 | * (C) 2002-2004 Netfilter Core Team <coreteam@netfilter.org> | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License version 2 as | |
6 | * published by the Free Software Foundation. | |
9fb9cbb1 YK |
7 | */ |
8 | ||
9fb9cbb1 YK |
9 | #include <linux/types.h> |
10 | #include <linux/netfilter.h> | |
11 | #include <linux/module.h> | |
12 | #include <linux/skbuff.h> | |
13 | #include <linux/proc_fs.h> | |
14 | #include <linux/seq_file.h> | |
15 | #include <linux/percpu.h> | |
16 | #include <linux/netdevice.h> | |
457c4cbc | 17 | #include <net/net_namespace.h> |
9fb9cbb1 YK |
18 | #ifdef CONFIG_SYSCTL |
19 | #include <linux/sysctl.h> | |
20 | #endif | |
21 | ||
9fb9cbb1 | 22 | #include <net/netfilter/nf_conntrack.h> |
f6180121 | 23 | #include <net/netfilter/nf_conntrack_core.h> |
9fb9cbb1 | 24 | #include <net/netfilter/nf_conntrack_l3proto.h> |
605dcad6 | 25 | #include <net/netfilter/nf_conntrack_l4proto.h> |
77ab9cff | 26 | #include <net/netfilter/nf_conntrack_expect.h> |
9fb9cbb1 | 27 | #include <net/netfilter/nf_conntrack_helper.h> |
9fb9cbb1 | 28 | |
9fb9cbb1 YK |
29 | MODULE_LICENSE("GPL"); |
30 | ||
9fb9cbb1 | 31 | #ifdef CONFIG_PROC_FS |
77ab9cff | 32 | int |
9fb9cbb1 | 33 | print_tuple(struct seq_file *s, const struct nf_conntrack_tuple *tuple, |
32948588 JE |
34 | const struct nf_conntrack_l3proto *l3proto, |
35 | const struct nf_conntrack_l4proto *l4proto) | |
9fb9cbb1 | 36 | { |
605dcad6 | 37 | return l3proto->print_tuple(s, tuple) || l4proto->print_tuple(s, tuple); |
9fb9cbb1 | 38 | } |
e4bd8bce | 39 | EXPORT_SYMBOL_GPL(print_tuple); |
9fb9cbb1 YK |
40 | |
41 | #ifdef CONFIG_NF_CT_ACCT | |
42 | static unsigned int | |
43 | seq_print_counters(struct seq_file *s, | |
44 | const struct ip_conntrack_counter *counter) | |
45 | { | |
46 | return seq_printf(s, "packets=%llu bytes=%llu ", | |
47 | (unsigned long long)counter->packets, | |
48 | (unsigned long long)counter->bytes); | |
49 | } | |
50 | #else | |
51 | #define seq_print_counters(x, y) 0 | |
52 | #endif | |
53 | ||
54 | struct ct_iter_state { | |
55 | unsigned int bucket; | |
56 | }; | |
57 | ||
f205c5e0 | 58 | static struct hlist_node *ct_get_first(struct seq_file *seq) |
9fb9cbb1 YK |
59 | { |
60 | struct ct_iter_state *st = seq->private; | |
76507f69 | 61 | struct hlist_node *n; |
9fb9cbb1 YK |
62 | |
63 | for (st->bucket = 0; | |
64 | st->bucket < nf_conntrack_htable_size; | |
65 | st->bucket++) { | |
76507f69 PM |
66 | n = rcu_dereference(nf_conntrack_hash[st->bucket].first); |
67 | if (n) | |
68 | return n; | |
9fb9cbb1 YK |
69 | } |
70 | return NULL; | |
71 | } | |
72 | ||
f205c5e0 PM |
73 | static struct hlist_node *ct_get_next(struct seq_file *seq, |
74 | struct hlist_node *head) | |
9fb9cbb1 YK |
75 | { |
76 | struct ct_iter_state *st = seq->private; | |
77 | ||
76507f69 | 78 | head = rcu_dereference(head->next); |
f205c5e0 | 79 | while (head == NULL) { |
9fb9cbb1 YK |
80 | if (++st->bucket >= nf_conntrack_htable_size) |
81 | return NULL; | |
76507f69 | 82 | head = rcu_dereference(nf_conntrack_hash[st->bucket].first); |
9fb9cbb1 YK |
83 | } |
84 | return head; | |
85 | } | |
86 | ||
f205c5e0 | 87 | static struct hlist_node *ct_get_idx(struct seq_file *seq, loff_t pos) |
9fb9cbb1 | 88 | { |
f205c5e0 | 89 | struct hlist_node *head = ct_get_first(seq); |
9fb9cbb1 YK |
90 | |
91 | if (head) | |
92 | while (pos && (head = ct_get_next(seq, head))) | |
93 | pos--; | |
94 | return pos ? NULL : head; | |
95 | } | |
96 | ||
97 | static void *ct_seq_start(struct seq_file *seq, loff_t *pos) | |
76507f69 | 98 | __acquires(RCU) |
9fb9cbb1 | 99 | { |
76507f69 | 100 | rcu_read_lock(); |
9fb9cbb1 YK |
101 | return ct_get_idx(seq, *pos); |
102 | } | |
103 | ||
104 | static void *ct_seq_next(struct seq_file *s, void *v, loff_t *pos) | |
105 | { | |
106 | (*pos)++; | |
107 | return ct_get_next(s, v); | |
108 | } | |
109 | ||
110 | static void ct_seq_stop(struct seq_file *s, void *v) | |
76507f69 | 111 | __releases(RCU) |
9fb9cbb1 | 112 | { |
76507f69 | 113 | rcu_read_unlock(); |
9fb9cbb1 YK |
114 | } |
115 | ||
116 | /* return 0 on success, 1 in case of error */ | |
117 | static int ct_seq_show(struct seq_file *s, void *v) | |
118 | { | |
119 | const struct nf_conntrack_tuple_hash *hash = v; | |
c88130bc | 120 | const struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(hash); |
32948588 JE |
121 | const struct nf_conntrack_l3proto *l3proto; |
122 | const struct nf_conntrack_l4proto *l4proto; | |
9fb9cbb1 | 123 | |
c88130bc | 124 | NF_CT_ASSERT(ct); |
9fb9cbb1 YK |
125 | |
126 | /* we only want to print DIR_ORIGINAL */ | |
127 | if (NF_CT_DIRECTION(hash)) | |
128 | return 0; | |
129 | ||
5e8fbe2a | 130 | l3proto = __nf_ct_l3proto_find(nf_ct_l3num(ct)); |
9fb9cbb1 | 131 | NF_CT_ASSERT(l3proto); |
5e8fbe2a | 132 | l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct)); |
605dcad6 | 133 | NF_CT_ASSERT(l4proto); |
9fb9cbb1 YK |
134 | |
135 | if (seq_printf(s, "%-8s %u %-8s %u %ld ", | |
5e8fbe2a PM |
136 | l3proto->name, nf_ct_l3num(ct), |
137 | l4proto->name, nf_ct_protonum(ct), | |
c88130bc PM |
138 | timer_pending(&ct->timeout) |
139 | ? (long)(ct->timeout.expires - jiffies)/HZ : 0) != 0) | |
9fb9cbb1 YK |
140 | return -ENOSPC; |
141 | ||
c88130bc | 142 | if (l4proto->print_conntrack && l4proto->print_conntrack(s, ct)) |
9fb9cbb1 YK |
143 | return -ENOSPC; |
144 | ||
c88130bc | 145 | if (print_tuple(s, &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple, |
605dcad6 | 146 | l3proto, l4proto)) |
9fb9cbb1 YK |
147 | return -ENOSPC; |
148 | ||
c88130bc | 149 | if (seq_print_counters(s, &ct->counters[IP_CT_DIR_ORIGINAL])) |
9fb9cbb1 YK |
150 | return -ENOSPC; |
151 | ||
c88130bc | 152 | if (!(test_bit(IPS_SEEN_REPLY_BIT, &ct->status))) |
9fb9cbb1 YK |
153 | if (seq_printf(s, "[UNREPLIED] ")) |
154 | return -ENOSPC; | |
155 | ||
c88130bc | 156 | if (print_tuple(s, &ct->tuplehash[IP_CT_DIR_REPLY].tuple, |
605dcad6 | 157 | l3proto, l4proto)) |
9fb9cbb1 YK |
158 | return -ENOSPC; |
159 | ||
c88130bc | 160 | if (seq_print_counters(s, &ct->counters[IP_CT_DIR_REPLY])) |
9fb9cbb1 YK |
161 | return -ENOSPC; |
162 | ||
c88130bc | 163 | if (test_bit(IPS_ASSURED_BIT, &ct->status)) |
9fb9cbb1 YK |
164 | if (seq_printf(s, "[ASSURED] ")) |
165 | return -ENOSPC; | |
166 | ||
167 | #if defined(CONFIG_NF_CONNTRACK_MARK) | |
c88130bc | 168 | if (seq_printf(s, "mark=%u ", ct->mark)) |
9fb9cbb1 YK |
169 | return -ENOSPC; |
170 | #endif | |
171 | ||
7c9728c3 | 172 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
c88130bc | 173 | if (seq_printf(s, "secmark=%u ", ct->secmark)) |
7c9728c3 JM |
174 | return -ENOSPC; |
175 | #endif | |
176 | ||
c88130bc | 177 | if (seq_printf(s, "use=%u\n", atomic_read(&ct->ct_general.use))) |
9fb9cbb1 | 178 | return -ENOSPC; |
a5d29264 | 179 | |
9fb9cbb1 YK |
180 | return 0; |
181 | } | |
182 | ||
56b3d975 | 183 | static const struct seq_operations ct_seq_ops = { |
9fb9cbb1 YK |
184 | .start = ct_seq_start, |
185 | .next = ct_seq_next, | |
186 | .stop = ct_seq_stop, | |
187 | .show = ct_seq_show | |
188 | }; | |
189 | ||
190 | static int ct_open(struct inode *inode, struct file *file) | |
191 | { | |
e2da5913 PE |
192 | return seq_open_private(file, &ct_seq_ops, |
193 | sizeof(struct ct_iter_state)); | |
9fb9cbb1 YK |
194 | } |
195 | ||
da7071d7 | 196 | static const struct file_operations ct_file_ops = { |
9fb9cbb1 YK |
197 | .owner = THIS_MODULE, |
198 | .open = ct_open, | |
199 | .read = seq_read, | |
200 | .llseek = seq_lseek, | |
201 | .release = seq_release_private, | |
202 | }; | |
203 | ||
9fb9cbb1 YK |
204 | static void *ct_cpu_seq_start(struct seq_file *seq, loff_t *pos) |
205 | { | |
206 | int cpu; | |
207 | ||
208 | if (*pos == 0) | |
209 | return SEQ_START_TOKEN; | |
210 | ||
211 | for (cpu = *pos-1; cpu < NR_CPUS; ++cpu) { | |
212 | if (!cpu_possible(cpu)) | |
213 | continue; | |
214 | *pos = cpu + 1; | |
215 | return &per_cpu(nf_conntrack_stat, cpu); | |
216 | } | |
217 | ||
218 | return NULL; | |
219 | } | |
220 | ||
221 | static void *ct_cpu_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
222 | { | |
223 | int cpu; | |
224 | ||
225 | for (cpu = *pos; cpu < NR_CPUS; ++cpu) { | |
226 | if (!cpu_possible(cpu)) | |
227 | continue; | |
228 | *pos = cpu + 1; | |
229 | return &per_cpu(nf_conntrack_stat, cpu); | |
230 | } | |
231 | ||
232 | return NULL; | |
233 | } | |
234 | ||
235 | static void ct_cpu_seq_stop(struct seq_file *seq, void *v) | |
236 | { | |
237 | } | |
238 | ||
239 | static int ct_cpu_seq_show(struct seq_file *seq, void *v) | |
240 | { | |
241 | unsigned int nr_conntracks = atomic_read(&nf_conntrack_count); | |
32948588 | 242 | const struct ip_conntrack_stat *st = v; |
9fb9cbb1 YK |
243 | |
244 | if (v == SEQ_START_TOKEN) { | |
245 | seq_printf(seq, "entries searched found new invalid ignore delete delete_list insert insert_failed drop early_drop icmp_error expect_new expect_create expect_delete\n"); | |
246 | return 0; | |
247 | } | |
248 | ||
249 | seq_printf(seq, "%08x %08x %08x %08x %08x %08x %08x %08x " | |
250 | "%08x %08x %08x %08x %08x %08x %08x %08x \n", | |
251 | nr_conntracks, | |
252 | st->searched, | |
253 | st->found, | |
254 | st->new, | |
255 | st->invalid, | |
256 | st->ignore, | |
257 | st->delete, | |
258 | st->delete_list, | |
259 | st->insert, | |
260 | st->insert_failed, | |
261 | st->drop, | |
262 | st->early_drop, | |
263 | st->error, | |
264 | ||
265 | st->expect_new, | |
266 | st->expect_create, | |
267 | st->expect_delete | |
268 | ); | |
269 | return 0; | |
270 | } | |
271 | ||
56b3d975 | 272 | static const struct seq_operations ct_cpu_seq_ops = { |
9fb9cbb1 YK |
273 | .start = ct_cpu_seq_start, |
274 | .next = ct_cpu_seq_next, | |
275 | .stop = ct_cpu_seq_stop, | |
276 | .show = ct_cpu_seq_show, | |
277 | }; | |
278 | ||
279 | static int ct_cpu_seq_open(struct inode *inode, struct file *file) | |
280 | { | |
281 | return seq_open(file, &ct_cpu_seq_ops); | |
282 | } | |
283 | ||
da7071d7 | 284 | static const struct file_operations ct_cpu_seq_fops = { |
9fb9cbb1 YK |
285 | .owner = THIS_MODULE, |
286 | .open = ct_cpu_seq_open, | |
287 | .read = seq_read, | |
288 | .llseek = seq_lseek, | |
665bba10 | 289 | .release = seq_release, |
9fb9cbb1 | 290 | }; |
b916f7d4 AD |
291 | |
292 | static int nf_conntrack_standalone_init_proc(void) | |
293 | { | |
294 | struct proc_dir_entry *pde; | |
295 | ||
296 | pde = proc_net_fops_create(&init_net, "nf_conntrack", 0440, &ct_file_ops); | |
297 | if (!pde) | |
298 | goto out_nf_conntrack; | |
52c0e111 DL |
299 | |
300 | pde = proc_create("nf_conntrack", S_IRUGO, init_net.proc_net_stat, | |
301 | &ct_cpu_seq_fops); | |
b916f7d4 AD |
302 | if (!pde) |
303 | goto out_stat_nf_conntrack; | |
b916f7d4 AD |
304 | return 0; |
305 | ||
306 | out_stat_nf_conntrack: | |
307 | proc_net_remove(&init_net, "nf_conntrack"); | |
308 | out_nf_conntrack: | |
309 | return -ENOMEM; | |
310 | } | |
311 | ||
312 | static void nf_conntrack_standalone_fini_proc(void) | |
313 | { | |
314 | remove_proc_entry("nf_conntrack", init_net.proc_net_stat); | |
315 | proc_net_remove(&init_net, "nf_conntrack"); | |
316 | } | |
317 | #else | |
318 | static int nf_conntrack_standalone_init_proc(void) | |
319 | { | |
320 | return 0; | |
321 | } | |
322 | ||
323 | static void nf_conntrack_standalone_fini_proc(void) | |
324 | { | |
325 | } | |
9fb9cbb1 YK |
326 | #endif /* CONFIG_PROC_FS */ |
327 | ||
328 | /* Sysctl support */ | |
329 | ||
94aec08e | 330 | int nf_conntrack_checksum __read_mostly = 1; |
13b18339 | 331 | EXPORT_SYMBOL_GPL(nf_conntrack_checksum); |
72b55823 | 332 | |
9fb9cbb1 | 333 | #ifdef CONFIG_SYSCTL |
9fb9cbb1 YK |
334 | /* Log invalid packets of a given protocol */ |
335 | static int log_invalid_proto_min = 0; | |
336 | static int log_invalid_proto_max = 255; | |
337 | ||
338 | static struct ctl_table_header *nf_ct_sysctl_header; | |
339 | ||
340 | static ctl_table nf_ct_sysctl_table[] = { | |
341 | { | |
342 | .ctl_name = NET_NF_CONNTRACK_MAX, | |
343 | .procname = "nf_conntrack_max", | |
344 | .data = &nf_conntrack_max, | |
345 | .maxlen = sizeof(int), | |
346 | .mode = 0644, | |
347 | .proc_handler = &proc_dointvec, | |
348 | }, | |
349 | { | |
350 | .ctl_name = NET_NF_CONNTRACK_COUNT, | |
351 | .procname = "nf_conntrack_count", | |
352 | .data = &nf_conntrack_count, | |
353 | .maxlen = sizeof(int), | |
354 | .mode = 0444, | |
355 | .proc_handler = &proc_dointvec, | |
356 | }, | |
357 | { | |
358 | .ctl_name = NET_NF_CONNTRACK_BUCKETS, | |
359 | .procname = "nf_conntrack_buckets", | |
360 | .data = &nf_conntrack_htable_size, | |
361 | .maxlen = sizeof(unsigned int), | |
362 | .mode = 0444, | |
363 | .proc_handler = &proc_dointvec, | |
364 | }, | |
39a27a35 PM |
365 | { |
366 | .ctl_name = NET_NF_CONNTRACK_CHECKSUM, | |
367 | .procname = "nf_conntrack_checksum", | |
368 | .data = &nf_conntrack_checksum, | |
369 | .maxlen = sizeof(unsigned int), | |
370 | .mode = 0644, | |
371 | .proc_handler = &proc_dointvec, | |
372 | }, | |
9fb9cbb1 YK |
373 | { |
374 | .ctl_name = NET_NF_CONNTRACK_LOG_INVALID, | |
375 | .procname = "nf_conntrack_log_invalid", | |
376 | .data = &nf_ct_log_invalid, | |
377 | .maxlen = sizeof(unsigned int), | |
378 | .mode = 0644, | |
379 | .proc_handler = &proc_dointvec_minmax, | |
380 | .strategy = &sysctl_intvec, | |
381 | .extra1 = &log_invalid_proto_min, | |
382 | .extra2 = &log_invalid_proto_max, | |
383 | }, | |
f264a7df PM |
384 | { |
385 | .ctl_name = CTL_UNNUMBERED, | |
386 | .procname = "nf_conntrack_expect_max", | |
387 | .data = &nf_ct_expect_max, | |
388 | .maxlen = sizeof(int), | |
389 | .mode = 0644, | |
390 | .proc_handler = &proc_dointvec, | |
391 | }, | |
9fb9cbb1 YK |
392 | { .ctl_name = 0 } |
393 | }; | |
394 | ||
395 | #define NET_NF_CONNTRACK_MAX 2089 | |
396 | ||
397 | static ctl_table nf_ct_netfilter_table[] = { | |
398 | { | |
399 | .ctl_name = NET_NETFILTER, | |
400 | .procname = "netfilter", | |
401 | .mode = 0555, | |
402 | .child = nf_ct_sysctl_table, | |
403 | }, | |
404 | { | |
405 | .ctl_name = NET_NF_CONNTRACK_MAX, | |
406 | .procname = "nf_conntrack_max", | |
407 | .data = &nf_conntrack_max, | |
408 | .maxlen = sizeof(int), | |
409 | .mode = 0644, | |
410 | .proc_handler = &proc_dointvec, | |
411 | }, | |
412 | { .ctl_name = 0 } | |
413 | }; | |
414 | ||
9e232495 | 415 | static struct ctl_path nf_ct_path[] = { |
3d7cc2ba PE |
416 | { .procname = "net", .ctl_name = CTL_NET, }, |
417 | { } | |
9fb9cbb1 | 418 | }; |
3d7cc2ba | 419 | |
13b18339 | 420 | EXPORT_SYMBOL_GPL(nf_ct_log_invalid); |
b916f7d4 AD |
421 | |
422 | static int nf_conntrack_standalone_init_sysctl(void) | |
423 | { | |
424 | nf_ct_sysctl_header = | |
425 | register_sysctl_paths(nf_ct_path, nf_ct_netfilter_table); | |
426 | if (nf_ct_sysctl_header == NULL) { | |
427 | printk("nf_conntrack: can't register to sysctl.\n"); | |
428 | return -ENOMEM; | |
429 | } | |
430 | return 0; | |
431 | ||
432 | } | |
433 | ||
434 | static void nf_conntrack_standalone_fini_sysctl(void) | |
435 | { | |
436 | unregister_sysctl_table(nf_ct_sysctl_header); | |
437 | } | |
438 | #else | |
439 | static int nf_conntrack_standalone_init_sysctl(void) | |
440 | { | |
441 | return 0; | |
442 | } | |
443 | ||
444 | static void nf_conntrack_standalone_fini_sysctl(void) | |
445 | { | |
446 | } | |
9fb9cbb1 YK |
447 | #endif /* CONFIG_SYSCTL */ |
448 | ||
65b4b4e8 | 449 | static int __init nf_conntrack_standalone_init(void) |
9fb9cbb1 | 450 | { |
b916f7d4 | 451 | int ret; |
32292a7f PM |
452 | |
453 | ret = nf_conntrack_init(); | |
454 | if (ret < 0) | |
b916f7d4 AD |
455 | goto out; |
456 | ret = nf_conntrack_standalone_init_proc(); | |
457 | if (ret < 0) | |
458 | goto out_proc; | |
459 | ret = nf_conntrack_standalone_init_sysctl(); | |
460 | if (ret < 0) | |
461 | goto out_sysctl; | |
462 | return 0; | |
32292a7f | 463 | |
b916f7d4 AD |
464 | out_sysctl: |
465 | nf_conntrack_standalone_fini_proc(); | |
466 | out_proc: | |
32292a7f | 467 | nf_conntrack_cleanup(); |
b916f7d4 | 468 | out: |
32292a7f | 469 | return ret; |
9fb9cbb1 YK |
470 | } |
471 | ||
65b4b4e8 | 472 | static void __exit nf_conntrack_standalone_fini(void) |
9fb9cbb1 | 473 | { |
b916f7d4 AD |
474 | nf_conntrack_standalone_fini_sysctl(); |
475 | nf_conntrack_standalone_fini_proc(); | |
32292a7f | 476 | nf_conntrack_cleanup(); |
9fb9cbb1 YK |
477 | } |
478 | ||
65b4b4e8 AM |
479 | module_init(nf_conntrack_standalone_init); |
480 | module_exit(nf_conntrack_standalone_fini); | |
9fb9cbb1 YK |
481 | |
482 | /* Some modules need us, but don't depend directly on any symbol. | |
483 | They should call this. */ | |
2e4e6a17 | 484 | void need_conntrack(void) |
9fb9cbb1 YK |
485 | { |
486 | } | |
13b18339 | 487 | EXPORT_SYMBOL_GPL(need_conntrack); |