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1 | // SPDX-License-Identifier: GPL-2.0 | |
2 | #include <linux/types.h> | |
3 | #include <linux/netfilter.h> | |
4 | #include <linux/slab.h> | |
5 | #include <linux/module.h> | |
6 | #include <linux/skbuff.h> | |
7 | #include <linux/proc_fs.h> | |
8 | #include <linux/seq_file.h> | |
9 | #include <linux/percpu.h> | |
10 | #include <linux/netdevice.h> | |
11 | #include <linux/security.h> | |
12 | #include <net/net_namespace.h> | |
13 | #ifdef CONFIG_SYSCTL | |
14 | #include <linux/sysctl.h> | |
15 | #endif | |
16 | ||
17 | #include <net/netfilter/nf_conntrack.h> | |
18 | #include <net/netfilter/nf_conntrack_core.h> | |
19 | #include <net/netfilter/nf_conntrack_l4proto.h> | |
20 | #include <net/netfilter/nf_conntrack_expect.h> | |
21 | #include <net/netfilter/nf_conntrack_helper.h> | |
22 | #include <net/netfilter/nf_conntrack_acct.h> | |
23 | #include <net/netfilter/nf_conntrack_zones.h> | |
24 | #include <net/netfilter/nf_conntrack_timestamp.h> | |
25 | #include <linux/rculist_nulls.h> | |
26 | ||
27 | static bool enable_hooks __read_mostly; | |
28 | MODULE_PARM_DESC(enable_hooks, "Always enable conntrack hooks"); | |
29 | module_param(enable_hooks, bool, 0000); | |
30 | ||
31 | unsigned int nf_conntrack_net_id __read_mostly; | |
32 | ||
33 | #ifdef CONFIG_NF_CONNTRACK_PROCFS | |
34 | void | |
35 | print_tuple(struct seq_file *s, const struct nf_conntrack_tuple *tuple, | |
36 | const struct nf_conntrack_l4proto *l4proto) | |
37 | { | |
38 | switch (tuple->src.l3num) { | |
39 | case NFPROTO_IPV4: | |
40 | seq_printf(s, "src=%pI4 dst=%pI4 ", | |
41 | &tuple->src.u3.ip, &tuple->dst.u3.ip); | |
42 | break; | |
43 | case NFPROTO_IPV6: | |
44 | seq_printf(s, "src=%pI6 dst=%pI6 ", | |
45 | tuple->src.u3.ip6, tuple->dst.u3.ip6); | |
46 | break; | |
47 | default: | |
48 | break; | |
49 | } | |
50 | ||
51 | switch (l4proto->l4proto) { | |
52 | case IPPROTO_ICMP: | |
53 | seq_printf(s, "type=%u code=%u id=%u ", | |
54 | tuple->dst.u.icmp.type, | |
55 | tuple->dst.u.icmp.code, | |
56 | ntohs(tuple->src.u.icmp.id)); | |
57 | break; | |
58 | case IPPROTO_TCP: | |
59 | seq_printf(s, "sport=%hu dport=%hu ", | |
60 | ntohs(tuple->src.u.tcp.port), | |
61 | ntohs(tuple->dst.u.tcp.port)); | |
62 | break; | |
63 | case IPPROTO_UDPLITE: /* fallthrough */ | |
64 | case IPPROTO_UDP: | |
65 | seq_printf(s, "sport=%hu dport=%hu ", | |
66 | ntohs(tuple->src.u.udp.port), | |
67 | ntohs(tuple->dst.u.udp.port)); | |
68 | ||
69 | break; | |
70 | case IPPROTO_DCCP: | |
71 | seq_printf(s, "sport=%hu dport=%hu ", | |
72 | ntohs(tuple->src.u.dccp.port), | |
73 | ntohs(tuple->dst.u.dccp.port)); | |
74 | break; | |
75 | case IPPROTO_SCTP: | |
76 | seq_printf(s, "sport=%hu dport=%hu ", | |
77 | ntohs(tuple->src.u.sctp.port), | |
78 | ntohs(tuple->dst.u.sctp.port)); | |
79 | break; | |
80 | case IPPROTO_ICMPV6: | |
81 | seq_printf(s, "type=%u code=%u id=%u ", | |
82 | tuple->dst.u.icmp.type, | |
83 | tuple->dst.u.icmp.code, | |
84 | ntohs(tuple->src.u.icmp.id)); | |
85 | break; | |
86 | case IPPROTO_GRE: | |
87 | seq_printf(s, "srckey=0x%x dstkey=0x%x ", | |
88 | ntohs(tuple->src.u.gre.key), | |
89 | ntohs(tuple->dst.u.gre.key)); | |
90 | break; | |
91 | default: | |
92 | break; | |
93 | } | |
94 | } | |
95 | EXPORT_SYMBOL_GPL(print_tuple); | |
96 | ||
97 | struct ct_iter_state { | |
98 | struct seq_net_private p; | |
99 | struct hlist_nulls_head *hash; | |
100 | unsigned int htable_size; | |
101 | unsigned int bucket; | |
102 | u_int64_t time_now; | |
103 | }; | |
104 | ||
105 | static struct hlist_nulls_node *ct_get_first(struct seq_file *seq) | |
106 | { | |
107 | struct ct_iter_state *st = seq->private; | |
108 | struct hlist_nulls_node *n; | |
109 | ||
110 | for (st->bucket = 0; | |
111 | st->bucket < st->htable_size; | |
112 | st->bucket++) { | |
113 | n = rcu_dereference( | |
114 | hlist_nulls_first_rcu(&st->hash[st->bucket])); | |
115 | if (!is_a_nulls(n)) | |
116 | return n; | |
117 | } | |
118 | return NULL; | |
119 | } | |
120 | ||
121 | static struct hlist_nulls_node *ct_get_next(struct seq_file *seq, | |
122 | struct hlist_nulls_node *head) | |
123 | { | |
124 | struct ct_iter_state *st = seq->private; | |
125 | ||
126 | head = rcu_dereference(hlist_nulls_next_rcu(head)); | |
127 | while (is_a_nulls(head)) { | |
128 | if (likely(get_nulls_value(head) == st->bucket)) { | |
129 | if (++st->bucket >= st->htable_size) | |
130 | return NULL; | |
131 | } | |
132 | head = rcu_dereference( | |
133 | hlist_nulls_first_rcu(&st->hash[st->bucket])); | |
134 | } | |
135 | return head; | |
136 | } | |
137 | ||
138 | static struct hlist_nulls_node *ct_get_idx(struct seq_file *seq, loff_t pos) | |
139 | { | |
140 | struct hlist_nulls_node *head = ct_get_first(seq); | |
141 | ||
142 | if (head) | |
143 | while (pos && (head = ct_get_next(seq, head))) | |
144 | pos--; | |
145 | return pos ? NULL : head; | |
146 | } | |
147 | ||
148 | static void *ct_seq_start(struct seq_file *seq, loff_t *pos) | |
149 | __acquires(RCU) | |
150 | { | |
151 | struct ct_iter_state *st = seq->private; | |
152 | ||
153 | st->time_now = ktime_get_real_ns(); | |
154 | rcu_read_lock(); | |
155 | ||
156 | nf_conntrack_get_ht(&st->hash, &st->htable_size); | |
157 | return ct_get_idx(seq, *pos); | |
158 | } | |
159 | ||
160 | static void *ct_seq_next(struct seq_file *s, void *v, loff_t *pos) | |
161 | { | |
162 | (*pos)++; | |
163 | return ct_get_next(s, v); | |
164 | } | |
165 | ||
166 | static void ct_seq_stop(struct seq_file *s, void *v) | |
167 | __releases(RCU) | |
168 | { | |
169 | rcu_read_unlock(); | |
170 | } | |
171 | ||
172 | #ifdef CONFIG_NF_CONNTRACK_SECMARK | |
173 | static void ct_show_secctx(struct seq_file *s, const struct nf_conn *ct) | |
174 | { | |
175 | int ret; | |
176 | u32 len; | |
177 | char *secctx; | |
178 | ||
179 | ret = security_secid_to_secctx(ct->secmark, &secctx, &len); | |
180 | if (ret) | |
181 | return; | |
182 | ||
183 | seq_printf(s, "secctx=%s ", secctx); | |
184 | ||
185 | security_release_secctx(secctx, len); | |
186 | } | |
187 | #else | |
188 | static inline void ct_show_secctx(struct seq_file *s, const struct nf_conn *ct) | |
189 | { | |
190 | } | |
191 | #endif | |
192 | ||
193 | #ifdef CONFIG_NF_CONNTRACK_ZONES | |
194 | static void ct_show_zone(struct seq_file *s, const struct nf_conn *ct, | |
195 | int dir) | |
196 | { | |
197 | const struct nf_conntrack_zone *zone = nf_ct_zone(ct); | |
198 | ||
199 | if (zone->dir != dir) | |
200 | return; | |
201 | switch (zone->dir) { | |
202 | case NF_CT_DEFAULT_ZONE_DIR: | |
203 | seq_printf(s, "zone=%u ", zone->id); | |
204 | break; | |
205 | case NF_CT_ZONE_DIR_ORIG: | |
206 | seq_printf(s, "zone-orig=%u ", zone->id); | |
207 | break; | |
208 | case NF_CT_ZONE_DIR_REPL: | |
209 | seq_printf(s, "zone-reply=%u ", zone->id); | |
210 | break; | |
211 | default: | |
212 | break; | |
213 | } | |
214 | } | |
215 | #else | |
216 | static inline void ct_show_zone(struct seq_file *s, const struct nf_conn *ct, | |
217 | int dir) | |
218 | { | |
219 | } | |
220 | #endif | |
221 | ||
222 | #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP | |
223 | static void ct_show_delta_time(struct seq_file *s, const struct nf_conn *ct) | |
224 | { | |
225 | struct ct_iter_state *st = s->private; | |
226 | struct nf_conn_tstamp *tstamp; | |
227 | s64 delta_time; | |
228 | ||
229 | tstamp = nf_conn_tstamp_find(ct); | |
230 | if (tstamp) { | |
231 | delta_time = st->time_now - tstamp->start; | |
232 | if (delta_time > 0) | |
233 | delta_time = div_s64(delta_time, NSEC_PER_SEC); | |
234 | else | |
235 | delta_time = 0; | |
236 | ||
237 | seq_printf(s, "delta-time=%llu ", | |
238 | (unsigned long long)delta_time); | |
239 | } | |
240 | return; | |
241 | } | |
242 | #else | |
243 | static inline void | |
244 | ct_show_delta_time(struct seq_file *s, const struct nf_conn *ct) | |
245 | { | |
246 | } | |
247 | #endif | |
248 | ||
249 | static const char* l3proto_name(u16 proto) | |
250 | { | |
251 | switch (proto) { | |
252 | case AF_INET: return "ipv4"; | |
253 | case AF_INET6: return "ipv6"; | |
254 | } | |
255 | ||
256 | return "unknown"; | |
257 | } | |
258 | ||
259 | static const char* l4proto_name(u16 proto) | |
260 | { | |
261 | switch (proto) { | |
262 | case IPPROTO_ICMP: return "icmp"; | |
263 | case IPPROTO_TCP: return "tcp"; | |
264 | case IPPROTO_UDP: return "udp"; | |
265 | case IPPROTO_DCCP: return "dccp"; | |
266 | case IPPROTO_GRE: return "gre"; | |
267 | case IPPROTO_SCTP: return "sctp"; | |
268 | case IPPROTO_UDPLITE: return "udplite"; | |
269 | } | |
270 | ||
271 | return "unknown"; | |
272 | } | |
273 | ||
274 | static unsigned int | |
275 | seq_print_acct(struct seq_file *s, const struct nf_conn *ct, int dir) | |
276 | { | |
277 | struct nf_conn_acct *acct; | |
278 | struct nf_conn_counter *counter; | |
279 | ||
280 | acct = nf_conn_acct_find(ct); | |
281 | if (!acct) | |
282 | return 0; | |
283 | ||
284 | counter = acct->counter; | |
285 | seq_printf(s, "packets=%llu bytes=%llu ", | |
286 | (unsigned long long)atomic64_read(&counter[dir].packets), | |
287 | (unsigned long long)atomic64_read(&counter[dir].bytes)); | |
288 | ||
289 | return 0; | |
290 | } | |
291 | ||
292 | /* return 0 on success, 1 in case of error */ | |
293 | static int ct_seq_show(struct seq_file *s, void *v) | |
294 | { | |
295 | struct nf_conntrack_tuple_hash *hash = v; | |
296 | struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(hash); | |
297 | const struct nf_conntrack_l4proto *l4proto; | |
298 | struct net *net = seq_file_net(s); | |
299 | int ret = 0; | |
300 | ||
301 | WARN_ON(!ct); | |
302 | if (unlikely(!atomic_inc_not_zero(&ct->ct_general.use))) | |
303 | return 0; | |
304 | ||
305 | if (nf_ct_should_gc(ct)) { | |
306 | nf_ct_kill(ct); | |
307 | goto release; | |
308 | } | |
309 | ||
310 | /* we only want to print DIR_ORIGINAL */ | |
311 | if (NF_CT_DIRECTION(hash)) | |
312 | goto release; | |
313 | ||
314 | if (!net_eq(nf_ct_net(ct), net)) | |
315 | goto release; | |
316 | ||
317 | l4proto = nf_ct_l4proto_find(nf_ct_protonum(ct)); | |
318 | ||
319 | ret = -ENOSPC; | |
320 | seq_printf(s, "%-8s %u %-8s %u ", | |
321 | l3proto_name(nf_ct_l3num(ct)), nf_ct_l3num(ct), | |
322 | l4proto_name(l4proto->l4proto), nf_ct_protonum(ct)); | |
323 | ||
324 | if (!test_bit(IPS_OFFLOAD_BIT, &ct->status)) | |
325 | seq_printf(s, "%ld ", nf_ct_expires(ct) / HZ); | |
326 | ||
327 | if (l4proto->print_conntrack) | |
328 | l4proto->print_conntrack(s, ct); | |
329 | ||
330 | print_tuple(s, &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple, | |
331 | l4proto); | |
332 | ||
333 | ct_show_zone(s, ct, NF_CT_ZONE_DIR_ORIG); | |
334 | ||
335 | if (seq_has_overflowed(s)) | |
336 | goto release; | |
337 | ||
338 | if (seq_print_acct(s, ct, IP_CT_DIR_ORIGINAL)) | |
339 | goto release; | |
340 | ||
341 | if (!(test_bit(IPS_SEEN_REPLY_BIT, &ct->status))) | |
342 | seq_puts(s, "[UNREPLIED] "); | |
343 | ||
344 | print_tuple(s, &ct->tuplehash[IP_CT_DIR_REPLY].tuple, l4proto); | |
345 | ||
346 | ct_show_zone(s, ct, NF_CT_ZONE_DIR_REPL); | |
347 | ||
348 | if (seq_print_acct(s, ct, IP_CT_DIR_REPLY)) | |
349 | goto release; | |
350 | ||
351 | if (test_bit(IPS_OFFLOAD_BIT, &ct->status)) | |
352 | seq_puts(s, "[OFFLOAD] "); | |
353 | else if (test_bit(IPS_ASSURED_BIT, &ct->status)) | |
354 | seq_puts(s, "[ASSURED] "); | |
355 | ||
356 | if (seq_has_overflowed(s)) | |
357 | goto release; | |
358 | ||
359 | #if defined(CONFIG_NF_CONNTRACK_MARK) | |
360 | seq_printf(s, "mark=%u ", ct->mark); | |
361 | #endif | |
362 | ||
363 | ct_show_secctx(s, ct); | |
364 | ct_show_zone(s, ct, NF_CT_DEFAULT_ZONE_DIR); | |
365 | ct_show_delta_time(s, ct); | |
366 | ||
367 | seq_printf(s, "use=%u\n", atomic_read(&ct->ct_general.use)); | |
368 | ||
369 | if (seq_has_overflowed(s)) | |
370 | goto release; | |
371 | ||
372 | ret = 0; | |
373 | release: | |
374 | nf_ct_put(ct); | |
375 | return ret; | |
376 | } | |
377 | ||
378 | static const struct seq_operations ct_seq_ops = { | |
379 | .start = ct_seq_start, | |
380 | .next = ct_seq_next, | |
381 | .stop = ct_seq_stop, | |
382 | .show = ct_seq_show | |
383 | }; | |
384 | ||
385 | static void *ct_cpu_seq_start(struct seq_file *seq, loff_t *pos) | |
386 | { | |
387 | struct net *net = seq_file_net(seq); | |
388 | int cpu; | |
389 | ||
390 | if (*pos == 0) | |
391 | return SEQ_START_TOKEN; | |
392 | ||
393 | for (cpu = *pos-1; cpu < nr_cpu_ids; ++cpu) { | |
394 | if (!cpu_possible(cpu)) | |
395 | continue; | |
396 | *pos = cpu + 1; | |
397 | return per_cpu_ptr(net->ct.stat, cpu); | |
398 | } | |
399 | ||
400 | return NULL; | |
401 | } | |
402 | ||
403 | static void *ct_cpu_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
404 | { | |
405 | struct net *net = seq_file_net(seq); | |
406 | int cpu; | |
407 | ||
408 | for (cpu = *pos; cpu < nr_cpu_ids; ++cpu) { | |
409 | if (!cpu_possible(cpu)) | |
410 | continue; | |
411 | *pos = cpu + 1; | |
412 | return per_cpu_ptr(net->ct.stat, cpu); | |
413 | } | |
414 | ||
415 | return NULL; | |
416 | } | |
417 | ||
418 | static void ct_cpu_seq_stop(struct seq_file *seq, void *v) | |
419 | { | |
420 | } | |
421 | ||
422 | static int ct_cpu_seq_show(struct seq_file *seq, void *v) | |
423 | { | |
424 | struct net *net = seq_file_net(seq); | |
425 | unsigned int nr_conntracks = atomic_read(&net->ct.count); | |
426 | const struct ip_conntrack_stat *st = v; | |
427 | ||
428 | if (v == SEQ_START_TOKEN) { | |
429 | seq_puts(seq, "entries searched found new invalid ignore delete delete_list insert insert_failed drop early_drop icmp_error expect_new expect_create expect_delete search_restart\n"); | |
430 | return 0; | |
431 | } | |
432 | ||
433 | seq_printf(seq, "%08x %08x %08x %08x %08x %08x %08x %08x " | |
434 | "%08x %08x %08x %08x %08x %08x %08x %08x %08x\n", | |
435 | nr_conntracks, | |
436 | 0, | |
437 | st->found, | |
438 | 0, | |
439 | st->invalid, | |
440 | st->ignore, | |
441 | 0, | |
442 | 0, | |
443 | st->insert, | |
444 | st->insert_failed, | |
445 | st->drop, | |
446 | st->early_drop, | |
447 | st->error, | |
448 | ||
449 | st->expect_new, | |
450 | st->expect_create, | |
451 | st->expect_delete, | |
452 | st->search_restart | |
453 | ); | |
454 | return 0; | |
455 | } | |
456 | ||
457 | static const struct seq_operations ct_cpu_seq_ops = { | |
458 | .start = ct_cpu_seq_start, | |
459 | .next = ct_cpu_seq_next, | |
460 | .stop = ct_cpu_seq_stop, | |
461 | .show = ct_cpu_seq_show, | |
462 | }; | |
463 | ||
464 | static int nf_conntrack_standalone_init_proc(struct net *net) | |
465 | { | |
466 | struct proc_dir_entry *pde; | |
467 | kuid_t root_uid; | |
468 | kgid_t root_gid; | |
469 | ||
470 | pde = proc_create_net("nf_conntrack", 0440, net->proc_net, &ct_seq_ops, | |
471 | sizeof(struct ct_iter_state)); | |
472 | if (!pde) | |
473 | goto out_nf_conntrack; | |
474 | ||
475 | root_uid = make_kuid(net->user_ns, 0); | |
476 | root_gid = make_kgid(net->user_ns, 0); | |
477 | if (uid_valid(root_uid) && gid_valid(root_gid)) | |
478 | proc_set_user(pde, root_uid, root_gid); | |
479 | ||
480 | pde = proc_create_net("nf_conntrack", 0444, net->proc_net_stat, | |
481 | &ct_cpu_seq_ops, sizeof(struct seq_net_private)); | |
482 | if (!pde) | |
483 | goto out_stat_nf_conntrack; | |
484 | return 0; | |
485 | ||
486 | out_stat_nf_conntrack: | |
487 | remove_proc_entry("nf_conntrack", net->proc_net); | |
488 | out_nf_conntrack: | |
489 | return -ENOMEM; | |
490 | } | |
491 | ||
492 | static void nf_conntrack_standalone_fini_proc(struct net *net) | |
493 | { | |
494 | remove_proc_entry("nf_conntrack", net->proc_net_stat); | |
495 | remove_proc_entry("nf_conntrack", net->proc_net); | |
496 | } | |
497 | #else | |
498 | static int nf_conntrack_standalone_init_proc(struct net *net) | |
499 | { | |
500 | return 0; | |
501 | } | |
502 | ||
503 | static void nf_conntrack_standalone_fini_proc(struct net *net) | |
504 | { | |
505 | } | |
506 | #endif /* CONFIG_NF_CONNTRACK_PROCFS */ | |
507 | ||
508 | /* Sysctl support */ | |
509 | ||
510 | #ifdef CONFIG_SYSCTL | |
511 | /* Log invalid packets of a given protocol */ | |
512 | static int log_invalid_proto_min __read_mostly; | |
513 | static int log_invalid_proto_max __read_mostly = 255; | |
514 | ||
515 | /* size the user *wants to set */ | |
516 | static unsigned int nf_conntrack_htable_size_user __read_mostly; | |
517 | ||
518 | static int | |
519 | nf_conntrack_hash_sysctl(struct ctl_table *table, int write, | |
520 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
521 | { | |
522 | int ret; | |
523 | ||
524 | ret = proc_dointvec(table, write, buffer, lenp, ppos); | |
525 | if (ret < 0 || !write) | |
526 | return ret; | |
527 | ||
528 | /* update ret, we might not be able to satisfy request */ | |
529 | ret = nf_conntrack_hash_resize(nf_conntrack_htable_size_user); | |
530 | ||
531 | /* update it to the actual value used by conntrack */ | |
532 | nf_conntrack_htable_size_user = nf_conntrack_htable_size; | |
533 | return ret; | |
534 | } | |
535 | ||
536 | static struct ctl_table_header *nf_ct_netfilter_header; | |
537 | ||
538 | enum nf_ct_sysctl_index { | |
539 | NF_SYSCTL_CT_MAX, | |
540 | NF_SYSCTL_CT_COUNT, | |
541 | NF_SYSCTL_CT_BUCKETS, | |
542 | NF_SYSCTL_CT_CHECKSUM, | |
543 | NF_SYSCTL_CT_LOG_INVALID, | |
544 | NF_SYSCTL_CT_EXPECT_MAX, | |
545 | NF_SYSCTL_CT_ACCT, | |
546 | NF_SYSCTL_CT_HELPER, | |
547 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
548 | NF_SYSCTL_CT_EVENTS, | |
549 | #endif | |
550 | #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP | |
551 | NF_SYSCTL_CT_TIMESTAMP, | |
552 | #endif | |
553 | NF_SYSCTL_CT_PROTO_TIMEOUT_GENERIC, | |
554 | NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_SENT, | |
555 | NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_RECV, | |
556 | NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_ESTABLISHED, | |
557 | NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_FIN_WAIT, | |
558 | NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE_WAIT, | |
559 | NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_LAST_ACK, | |
560 | NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_TIME_WAIT, | |
561 | NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE, | |
562 | NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_RETRANS, | |
563 | NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_UNACK, | |
564 | NF_SYSCTL_CT_PROTO_TCP_LOOSE, | |
565 | NF_SYSCTL_CT_PROTO_TCP_LIBERAL, | |
566 | NF_SYSCTL_CT_PROTO_TCP_MAX_RETRANS, | |
567 | NF_SYSCTL_CT_PROTO_TIMEOUT_UDP, | |
568 | NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_STREAM, | |
569 | NF_SYSCTL_CT_PROTO_TIMEOUT_ICMP, | |
570 | NF_SYSCTL_CT_PROTO_TIMEOUT_ICMPV6, | |
571 | #ifdef CONFIG_NF_CT_PROTO_SCTP | |
572 | NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_CLOSED, | |
573 | NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_WAIT, | |
574 | NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_ECHOED, | |
575 | NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_ESTABLISHED, | |
576 | NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_SENT, | |
577 | NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_RECD, | |
578 | NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_ACK_SENT, | |
579 | NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_HEARTBEAT_SENT, | |
580 | NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_HEARTBEAT_ACKED, | |
581 | #endif | |
582 | #ifdef CONFIG_NF_CT_PROTO_DCCP | |
583 | NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_REQUEST, | |
584 | NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_RESPOND, | |
585 | NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_PARTOPEN, | |
586 | NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_OPEN, | |
587 | NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSEREQ, | |
588 | NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSING, | |
589 | NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_TIMEWAIT, | |
590 | NF_SYSCTL_CT_PROTO_DCCP_LOOSE, | |
591 | #endif | |
592 | #ifdef CONFIG_NF_CT_PROTO_GRE | |
593 | NF_SYSCTL_CT_PROTO_TIMEOUT_GRE, | |
594 | NF_SYSCTL_CT_PROTO_TIMEOUT_GRE_STREAM, | |
595 | #endif | |
596 | ||
597 | __NF_SYSCTL_CT_LAST_SYSCTL, | |
598 | }; | |
599 | ||
600 | #define NF_SYSCTL_CT_LAST_SYSCTL (__NF_SYSCTL_CT_LAST_SYSCTL + 1) | |
601 | ||
602 | static struct ctl_table nf_ct_sysctl_table[] = { | |
603 | [NF_SYSCTL_CT_MAX] = { | |
604 | .procname = "nf_conntrack_max", | |
605 | .data = &nf_conntrack_max, | |
606 | .maxlen = sizeof(int), | |
607 | .mode = 0644, | |
608 | .proc_handler = proc_dointvec, | |
609 | }, | |
610 | [NF_SYSCTL_CT_COUNT] = { | |
611 | .procname = "nf_conntrack_count", | |
612 | .data = &init_net.ct.count, | |
613 | .maxlen = sizeof(int), | |
614 | .mode = 0444, | |
615 | .proc_handler = proc_dointvec, | |
616 | }, | |
617 | [NF_SYSCTL_CT_BUCKETS] = { | |
618 | .procname = "nf_conntrack_buckets", | |
619 | .data = &nf_conntrack_htable_size_user, | |
620 | .maxlen = sizeof(unsigned int), | |
621 | .mode = 0644, | |
622 | .proc_handler = nf_conntrack_hash_sysctl, | |
623 | }, | |
624 | [NF_SYSCTL_CT_CHECKSUM] = { | |
625 | .procname = "nf_conntrack_checksum", | |
626 | .data = &init_net.ct.sysctl_checksum, | |
627 | .maxlen = sizeof(int), | |
628 | .mode = 0644, | |
629 | .proc_handler = proc_dointvec_minmax, | |
630 | .extra1 = SYSCTL_ZERO, | |
631 | .extra2 = SYSCTL_ONE, | |
632 | }, | |
633 | [NF_SYSCTL_CT_LOG_INVALID] = { | |
634 | .procname = "nf_conntrack_log_invalid", | |
635 | .data = &init_net.ct.sysctl_log_invalid, | |
636 | .maxlen = sizeof(unsigned int), | |
637 | .mode = 0644, | |
638 | .proc_handler = proc_dointvec_minmax, | |
639 | .extra1 = &log_invalid_proto_min, | |
640 | .extra2 = &log_invalid_proto_max, | |
641 | }, | |
642 | [NF_SYSCTL_CT_EXPECT_MAX] = { | |
643 | .procname = "nf_conntrack_expect_max", | |
644 | .data = &nf_ct_expect_max, | |
645 | .maxlen = sizeof(int), | |
646 | .mode = 0644, | |
647 | .proc_handler = proc_dointvec, | |
648 | }, | |
649 | [NF_SYSCTL_CT_ACCT] = { | |
650 | .procname = "nf_conntrack_acct", | |
651 | .data = &init_net.ct.sysctl_acct, | |
652 | .maxlen = sizeof(int), | |
653 | .mode = 0644, | |
654 | .proc_handler = proc_dointvec_minmax, | |
655 | .extra1 = SYSCTL_ZERO, | |
656 | .extra2 = SYSCTL_ONE, | |
657 | }, | |
658 | [NF_SYSCTL_CT_HELPER] = { | |
659 | .procname = "nf_conntrack_helper", | |
660 | .data = &init_net.ct.sysctl_auto_assign_helper, | |
661 | .maxlen = sizeof(int), | |
662 | .mode = 0644, | |
663 | .proc_handler = proc_dointvec_minmax, | |
664 | .extra1 = SYSCTL_ZERO, | |
665 | .extra2 = SYSCTL_ONE, | |
666 | }, | |
667 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
668 | [NF_SYSCTL_CT_EVENTS] = { | |
669 | .procname = "nf_conntrack_events", | |
670 | .data = &init_net.ct.sysctl_events, | |
671 | .maxlen = sizeof(int), | |
672 | .mode = 0644, | |
673 | .proc_handler = proc_dointvec_minmax, | |
674 | .extra1 = SYSCTL_ZERO, | |
675 | .extra2 = SYSCTL_ONE, | |
676 | }, | |
677 | #endif | |
678 | #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP | |
679 | [NF_SYSCTL_CT_TIMESTAMP] = { | |
680 | .procname = "nf_conntrack_timestamp", | |
681 | .data = &init_net.ct.sysctl_tstamp, | |
682 | .maxlen = sizeof(int), | |
683 | .mode = 0644, | |
684 | .proc_handler = proc_dointvec_minmax, | |
685 | .extra1 = SYSCTL_ZERO, | |
686 | .extra2 = SYSCTL_ONE, | |
687 | }, | |
688 | #endif | |
689 | [NF_SYSCTL_CT_PROTO_TIMEOUT_GENERIC] = { | |
690 | .procname = "nf_conntrack_generic_timeout", | |
691 | .maxlen = sizeof(unsigned int), | |
692 | .mode = 0644, | |
693 | .proc_handler = proc_dointvec_jiffies, | |
694 | }, | |
695 | [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_SENT] = { | |
696 | .procname = "nf_conntrack_tcp_timeout_syn_sent", | |
697 | .maxlen = sizeof(unsigned int), | |
698 | .mode = 0644, | |
699 | .proc_handler = proc_dointvec_jiffies, | |
700 | }, | |
701 | [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_RECV] = { | |
702 | .procname = "nf_conntrack_tcp_timeout_syn_recv", | |
703 | .maxlen = sizeof(unsigned int), | |
704 | .mode = 0644, | |
705 | .proc_handler = proc_dointvec_jiffies, | |
706 | }, | |
707 | [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_ESTABLISHED] = { | |
708 | .procname = "nf_conntrack_tcp_timeout_established", | |
709 | .maxlen = sizeof(unsigned int), | |
710 | .mode = 0644, | |
711 | .proc_handler = proc_dointvec_jiffies, | |
712 | }, | |
713 | [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_FIN_WAIT] = { | |
714 | .procname = "nf_conntrack_tcp_timeout_fin_wait", | |
715 | .maxlen = sizeof(unsigned int), | |
716 | .mode = 0644, | |
717 | .proc_handler = proc_dointvec_jiffies, | |
718 | }, | |
719 | [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE_WAIT] = { | |
720 | .procname = "nf_conntrack_tcp_timeout_close_wait", | |
721 | .maxlen = sizeof(unsigned int), | |
722 | .mode = 0644, | |
723 | .proc_handler = proc_dointvec_jiffies, | |
724 | }, | |
725 | [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_LAST_ACK] = { | |
726 | .procname = "nf_conntrack_tcp_timeout_last_ack", | |
727 | .maxlen = sizeof(unsigned int), | |
728 | .mode = 0644, | |
729 | .proc_handler = proc_dointvec_jiffies, | |
730 | }, | |
731 | [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_TIME_WAIT] = { | |
732 | .procname = "nf_conntrack_tcp_timeout_time_wait", | |
733 | .maxlen = sizeof(unsigned int), | |
734 | .mode = 0644, | |
735 | .proc_handler = proc_dointvec_jiffies, | |
736 | }, | |
737 | [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE] = { | |
738 | .procname = "nf_conntrack_tcp_timeout_close", | |
739 | .maxlen = sizeof(unsigned int), | |
740 | .mode = 0644, | |
741 | .proc_handler = proc_dointvec_jiffies, | |
742 | }, | |
743 | [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_RETRANS] = { | |
744 | .procname = "nf_conntrack_tcp_timeout_max_retrans", | |
745 | .maxlen = sizeof(unsigned int), | |
746 | .mode = 0644, | |
747 | .proc_handler = proc_dointvec_jiffies, | |
748 | }, | |
749 | [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_UNACK] = { | |
750 | .procname = "nf_conntrack_tcp_timeout_unacknowledged", | |
751 | .maxlen = sizeof(unsigned int), | |
752 | .mode = 0644, | |
753 | .proc_handler = proc_dointvec_jiffies, | |
754 | }, | |
755 | [NF_SYSCTL_CT_PROTO_TCP_LOOSE] = { | |
756 | .procname = "nf_conntrack_tcp_loose", | |
757 | .maxlen = sizeof(int), | |
758 | .mode = 0644, | |
759 | .proc_handler = proc_dointvec_minmax, | |
760 | .extra1 = SYSCTL_ZERO, | |
761 | .extra2 = SYSCTL_ONE, | |
762 | }, | |
763 | [NF_SYSCTL_CT_PROTO_TCP_LIBERAL] = { | |
764 | .procname = "nf_conntrack_tcp_be_liberal", | |
765 | .maxlen = sizeof(int), | |
766 | .mode = 0644, | |
767 | .proc_handler = proc_dointvec_minmax, | |
768 | .extra1 = SYSCTL_ZERO, | |
769 | .extra2 = SYSCTL_ONE, | |
770 | }, | |
771 | [NF_SYSCTL_CT_PROTO_TCP_MAX_RETRANS] = { | |
772 | .procname = "nf_conntrack_tcp_max_retrans", | |
773 | .maxlen = sizeof(unsigned int), | |
774 | .mode = 0644, | |
775 | .proc_handler = proc_dointvec, | |
776 | }, | |
777 | [NF_SYSCTL_CT_PROTO_TIMEOUT_UDP] = { | |
778 | .procname = "nf_conntrack_udp_timeout", | |
779 | .maxlen = sizeof(unsigned int), | |
780 | .mode = 0644, | |
781 | .proc_handler = proc_dointvec_jiffies, | |
782 | }, | |
783 | [NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_STREAM] = { | |
784 | .procname = "nf_conntrack_udp_timeout_stream", | |
785 | .maxlen = sizeof(unsigned int), | |
786 | .mode = 0644, | |
787 | .proc_handler = proc_dointvec_jiffies, | |
788 | }, | |
789 | [NF_SYSCTL_CT_PROTO_TIMEOUT_ICMP] = { | |
790 | .procname = "nf_conntrack_icmp_timeout", | |
791 | .maxlen = sizeof(unsigned int), | |
792 | .mode = 0644, | |
793 | .proc_handler = proc_dointvec_jiffies, | |
794 | }, | |
795 | [NF_SYSCTL_CT_PROTO_TIMEOUT_ICMPV6] = { | |
796 | .procname = "nf_conntrack_icmpv6_timeout", | |
797 | .maxlen = sizeof(unsigned int), | |
798 | .mode = 0644, | |
799 | .proc_handler = proc_dointvec_jiffies, | |
800 | }, | |
801 | #ifdef CONFIG_NF_CT_PROTO_SCTP | |
802 | [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_CLOSED] = { | |
803 | .procname = "nf_conntrack_sctp_timeout_closed", | |
804 | .maxlen = sizeof(unsigned int), | |
805 | .mode = 0644, | |
806 | .proc_handler = proc_dointvec_jiffies, | |
807 | }, | |
808 | [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_WAIT] = { | |
809 | .procname = "nf_conntrack_sctp_timeout_cookie_wait", | |
810 | .maxlen = sizeof(unsigned int), | |
811 | .mode = 0644, | |
812 | .proc_handler = proc_dointvec_jiffies, | |
813 | }, | |
814 | [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_ECHOED] = { | |
815 | .procname = "nf_conntrack_sctp_timeout_cookie_echoed", | |
816 | .maxlen = sizeof(unsigned int), | |
817 | .mode = 0644, | |
818 | .proc_handler = proc_dointvec_jiffies, | |
819 | }, | |
820 | [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_ESTABLISHED] = { | |
821 | .procname = "nf_conntrack_sctp_timeout_established", | |
822 | .maxlen = sizeof(unsigned int), | |
823 | .mode = 0644, | |
824 | .proc_handler = proc_dointvec_jiffies, | |
825 | }, | |
826 | [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_SENT] = { | |
827 | .procname = "nf_conntrack_sctp_timeout_shutdown_sent", | |
828 | .maxlen = sizeof(unsigned int), | |
829 | .mode = 0644, | |
830 | .proc_handler = proc_dointvec_jiffies, | |
831 | }, | |
832 | [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_RECD] = { | |
833 | .procname = "nf_conntrack_sctp_timeout_shutdown_recd", | |
834 | .maxlen = sizeof(unsigned int), | |
835 | .mode = 0644, | |
836 | .proc_handler = proc_dointvec_jiffies, | |
837 | }, | |
838 | [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_ACK_SENT] = { | |
839 | .procname = "nf_conntrack_sctp_timeout_shutdown_ack_sent", | |
840 | .maxlen = sizeof(unsigned int), | |
841 | .mode = 0644, | |
842 | .proc_handler = proc_dointvec_jiffies, | |
843 | }, | |
844 | [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_HEARTBEAT_SENT] = { | |
845 | .procname = "nf_conntrack_sctp_timeout_heartbeat_sent", | |
846 | .maxlen = sizeof(unsigned int), | |
847 | .mode = 0644, | |
848 | .proc_handler = proc_dointvec_jiffies, | |
849 | }, | |
850 | [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_HEARTBEAT_ACKED] = { | |
851 | .procname = "nf_conntrack_sctp_timeout_heartbeat_acked", | |
852 | .maxlen = sizeof(unsigned int), | |
853 | .mode = 0644, | |
854 | .proc_handler = proc_dointvec_jiffies, | |
855 | }, | |
856 | #endif | |
857 | #ifdef CONFIG_NF_CT_PROTO_DCCP | |
858 | [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_REQUEST] = { | |
859 | .procname = "nf_conntrack_dccp_timeout_request", | |
860 | .maxlen = sizeof(unsigned int), | |
861 | .mode = 0644, | |
862 | .proc_handler = proc_dointvec_jiffies, | |
863 | }, | |
864 | [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_RESPOND] = { | |
865 | .procname = "nf_conntrack_dccp_timeout_respond", | |
866 | .maxlen = sizeof(unsigned int), | |
867 | .mode = 0644, | |
868 | .proc_handler = proc_dointvec_jiffies, | |
869 | }, | |
870 | [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_PARTOPEN] = { | |
871 | .procname = "nf_conntrack_dccp_timeout_partopen", | |
872 | .maxlen = sizeof(unsigned int), | |
873 | .mode = 0644, | |
874 | .proc_handler = proc_dointvec_jiffies, | |
875 | }, | |
876 | [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_OPEN] = { | |
877 | .procname = "nf_conntrack_dccp_timeout_open", | |
878 | .maxlen = sizeof(unsigned int), | |
879 | .mode = 0644, | |
880 | .proc_handler = proc_dointvec_jiffies, | |
881 | }, | |
882 | [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSEREQ] = { | |
883 | .procname = "nf_conntrack_dccp_timeout_closereq", | |
884 | .maxlen = sizeof(unsigned int), | |
885 | .mode = 0644, | |
886 | .proc_handler = proc_dointvec_jiffies, | |
887 | }, | |
888 | [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSING] = { | |
889 | .procname = "nf_conntrack_dccp_timeout_closing", | |
890 | .maxlen = sizeof(unsigned int), | |
891 | .mode = 0644, | |
892 | .proc_handler = proc_dointvec_jiffies, | |
893 | }, | |
894 | [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_TIMEWAIT] = { | |
895 | .procname = "nf_conntrack_dccp_timeout_timewait", | |
896 | .maxlen = sizeof(unsigned int), | |
897 | .mode = 0644, | |
898 | .proc_handler = proc_dointvec_jiffies, | |
899 | }, | |
900 | [NF_SYSCTL_CT_PROTO_DCCP_LOOSE] = { | |
901 | .procname = "nf_conntrack_dccp_loose", | |
902 | .maxlen = sizeof(int), | |
903 | .mode = 0644, | |
904 | .proc_handler = proc_dointvec_minmax, | |
905 | .extra1 = SYSCTL_ZERO, | |
906 | .extra2 = SYSCTL_ONE, | |
907 | }, | |
908 | #endif | |
909 | #ifdef CONFIG_NF_CT_PROTO_GRE | |
910 | [NF_SYSCTL_CT_PROTO_TIMEOUT_GRE] = { | |
911 | .procname = "nf_conntrack_gre_timeout", | |
912 | .maxlen = sizeof(unsigned int), | |
913 | .mode = 0644, | |
914 | .proc_handler = proc_dointvec_jiffies, | |
915 | }, | |
916 | [NF_SYSCTL_CT_PROTO_TIMEOUT_GRE_STREAM] = { | |
917 | .procname = "nf_conntrack_gre_timeout_stream", | |
918 | .maxlen = sizeof(unsigned int), | |
919 | .mode = 0644, | |
920 | .proc_handler = proc_dointvec_jiffies, | |
921 | }, | |
922 | #endif | |
923 | {} | |
924 | }; | |
925 | ||
926 | static struct ctl_table nf_ct_netfilter_table[] = { | |
927 | { | |
928 | .procname = "nf_conntrack_max", | |
929 | .data = &nf_conntrack_max, | |
930 | .maxlen = sizeof(int), | |
931 | .mode = 0644, | |
932 | .proc_handler = proc_dointvec, | |
933 | }, | |
934 | { } | |
935 | }; | |
936 | ||
937 | static void nf_conntrack_standalone_init_tcp_sysctl(struct net *net, | |
938 | struct ctl_table *table) | |
939 | { | |
940 | struct nf_tcp_net *tn = nf_tcp_pernet(net); | |
941 | ||
942 | #define XASSIGN(XNAME, tn) \ | |
943 | table[NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_ ## XNAME].data = \ | |
944 | &(tn)->timeouts[TCP_CONNTRACK_ ## XNAME] | |
945 | ||
946 | XASSIGN(SYN_SENT, tn); | |
947 | XASSIGN(SYN_RECV, tn); | |
948 | XASSIGN(ESTABLISHED, tn); | |
949 | XASSIGN(FIN_WAIT, tn); | |
950 | XASSIGN(CLOSE_WAIT, tn); | |
951 | XASSIGN(LAST_ACK, tn); | |
952 | XASSIGN(TIME_WAIT, tn); | |
953 | XASSIGN(CLOSE, tn); | |
954 | XASSIGN(RETRANS, tn); | |
955 | XASSIGN(UNACK, tn); | |
956 | #undef XASSIGN | |
957 | #define XASSIGN(XNAME, rval) \ | |
958 | table[NF_SYSCTL_CT_PROTO_TCP_ ## XNAME].data = (rval) | |
959 | ||
960 | XASSIGN(LOOSE, &tn->tcp_loose); | |
961 | XASSIGN(LIBERAL, &tn->tcp_be_liberal); | |
962 | XASSIGN(MAX_RETRANS, &tn->tcp_max_retrans); | |
963 | #undef XASSIGN | |
964 | } | |
965 | ||
966 | static void nf_conntrack_standalone_init_sctp_sysctl(struct net *net, | |
967 | struct ctl_table *table) | |
968 | { | |
969 | #ifdef CONFIG_NF_CT_PROTO_SCTP | |
970 | struct nf_sctp_net *sn = nf_sctp_pernet(net); | |
971 | ||
972 | #define XASSIGN(XNAME, sn) \ | |
973 | table[NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_ ## XNAME].data = \ | |
974 | &(sn)->timeouts[SCTP_CONNTRACK_ ## XNAME] | |
975 | ||
976 | XASSIGN(CLOSED, sn); | |
977 | XASSIGN(COOKIE_WAIT, sn); | |
978 | XASSIGN(COOKIE_ECHOED, sn); | |
979 | XASSIGN(ESTABLISHED, sn); | |
980 | XASSIGN(SHUTDOWN_SENT, sn); | |
981 | XASSIGN(SHUTDOWN_RECD, sn); | |
982 | XASSIGN(SHUTDOWN_ACK_SENT, sn); | |
983 | XASSIGN(HEARTBEAT_SENT, sn); | |
984 | XASSIGN(HEARTBEAT_ACKED, sn); | |
985 | #undef XASSIGN | |
986 | #endif | |
987 | } | |
988 | ||
989 | static void nf_conntrack_standalone_init_dccp_sysctl(struct net *net, | |
990 | struct ctl_table *table) | |
991 | { | |
992 | #ifdef CONFIG_NF_CT_PROTO_DCCP | |
993 | struct nf_dccp_net *dn = nf_dccp_pernet(net); | |
994 | ||
995 | #define XASSIGN(XNAME, dn) \ | |
996 | table[NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_ ## XNAME].data = \ | |
997 | &(dn)->dccp_timeout[CT_DCCP_ ## XNAME] | |
998 | ||
999 | XASSIGN(REQUEST, dn); | |
1000 | XASSIGN(RESPOND, dn); | |
1001 | XASSIGN(PARTOPEN, dn); | |
1002 | XASSIGN(OPEN, dn); | |
1003 | XASSIGN(CLOSEREQ, dn); | |
1004 | XASSIGN(CLOSING, dn); | |
1005 | XASSIGN(TIMEWAIT, dn); | |
1006 | #undef XASSIGN | |
1007 | ||
1008 | table[NF_SYSCTL_CT_PROTO_DCCP_LOOSE].data = &dn->dccp_loose; | |
1009 | #endif | |
1010 | } | |
1011 | ||
1012 | static void nf_conntrack_standalone_init_gre_sysctl(struct net *net, | |
1013 | struct ctl_table *table) | |
1014 | { | |
1015 | #ifdef CONFIG_NF_CT_PROTO_GRE | |
1016 | struct nf_gre_net *gn = nf_gre_pernet(net); | |
1017 | ||
1018 | table[NF_SYSCTL_CT_PROTO_TIMEOUT_GRE].data = &gn->timeouts[GRE_CT_UNREPLIED]; | |
1019 | table[NF_SYSCTL_CT_PROTO_TIMEOUT_GRE_STREAM].data = &gn->timeouts[GRE_CT_REPLIED]; | |
1020 | #endif | |
1021 | } | |
1022 | ||
1023 | static int nf_conntrack_standalone_init_sysctl(struct net *net) | |
1024 | { | |
1025 | struct nf_udp_net *un = nf_udp_pernet(net); | |
1026 | struct ctl_table *table; | |
1027 | ||
1028 | BUILD_BUG_ON(ARRAY_SIZE(nf_ct_sysctl_table) != NF_SYSCTL_CT_LAST_SYSCTL); | |
1029 | ||
1030 | table = kmemdup(nf_ct_sysctl_table, sizeof(nf_ct_sysctl_table), | |
1031 | GFP_KERNEL); | |
1032 | if (!table) | |
1033 | return -ENOMEM; | |
1034 | ||
1035 | table[NF_SYSCTL_CT_COUNT].data = &net->ct.count; | |
1036 | table[NF_SYSCTL_CT_CHECKSUM].data = &net->ct.sysctl_checksum; | |
1037 | table[NF_SYSCTL_CT_LOG_INVALID].data = &net->ct.sysctl_log_invalid; | |
1038 | table[NF_SYSCTL_CT_ACCT].data = &net->ct.sysctl_acct; | |
1039 | table[NF_SYSCTL_CT_HELPER].data = &net->ct.sysctl_auto_assign_helper; | |
1040 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
1041 | table[NF_SYSCTL_CT_EVENTS].data = &net->ct.sysctl_events; | |
1042 | #endif | |
1043 | #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP | |
1044 | table[NF_SYSCTL_CT_TIMESTAMP].data = &net->ct.sysctl_tstamp; | |
1045 | #endif | |
1046 | table[NF_SYSCTL_CT_PROTO_TIMEOUT_GENERIC].data = &nf_generic_pernet(net)->timeout; | |
1047 | table[NF_SYSCTL_CT_PROTO_TIMEOUT_ICMP].data = &nf_icmp_pernet(net)->timeout; | |
1048 | table[NF_SYSCTL_CT_PROTO_TIMEOUT_ICMPV6].data = &nf_icmpv6_pernet(net)->timeout; | |
1049 | table[NF_SYSCTL_CT_PROTO_TIMEOUT_UDP].data = &un->timeouts[UDP_CT_UNREPLIED]; | |
1050 | table[NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_STREAM].data = &un->timeouts[UDP_CT_REPLIED]; | |
1051 | ||
1052 | nf_conntrack_standalone_init_tcp_sysctl(net, table); | |
1053 | nf_conntrack_standalone_init_sctp_sysctl(net, table); | |
1054 | nf_conntrack_standalone_init_dccp_sysctl(net, table); | |
1055 | nf_conntrack_standalone_init_gre_sysctl(net, table); | |
1056 | ||
1057 | /* Don't export sysctls to unprivileged users */ | |
1058 | if (net->user_ns != &init_user_ns) { | |
1059 | table[NF_SYSCTL_CT_MAX].procname = NULL; | |
1060 | table[NF_SYSCTL_CT_ACCT].procname = NULL; | |
1061 | table[NF_SYSCTL_CT_HELPER].procname = NULL; | |
1062 | #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP | |
1063 | table[NF_SYSCTL_CT_TIMESTAMP].procname = NULL; | |
1064 | #endif | |
1065 | #ifdef CONFIG_NF_CONNTRACK_EVENTS | |
1066 | table[NF_SYSCTL_CT_EVENTS].procname = NULL; | |
1067 | #endif | |
1068 | } | |
1069 | ||
1070 | if (!net_eq(&init_net, net)) | |
1071 | table[NF_SYSCTL_CT_BUCKETS].mode = 0444; | |
1072 | ||
1073 | net->ct.sysctl_header = register_net_sysctl(net, "net/netfilter", table); | |
1074 | if (!net->ct.sysctl_header) | |
1075 | goto out_unregister_netfilter; | |
1076 | ||
1077 | return 0; | |
1078 | ||
1079 | out_unregister_netfilter: | |
1080 | kfree(table); | |
1081 | return -ENOMEM; | |
1082 | } | |
1083 | ||
1084 | static void nf_conntrack_standalone_fini_sysctl(struct net *net) | |
1085 | { | |
1086 | struct ctl_table *table; | |
1087 | ||
1088 | table = net->ct.sysctl_header->ctl_table_arg; | |
1089 | unregister_net_sysctl_table(net->ct.sysctl_header); | |
1090 | kfree(table); | |
1091 | } | |
1092 | #else | |
1093 | static int nf_conntrack_standalone_init_sysctl(struct net *net) | |
1094 | { | |
1095 | return 0; | |
1096 | } | |
1097 | ||
1098 | static void nf_conntrack_standalone_fini_sysctl(struct net *net) | |
1099 | { | |
1100 | } | |
1101 | #endif /* CONFIG_SYSCTL */ | |
1102 | ||
1103 | static void nf_conntrack_fini_net(struct net *net) | |
1104 | { | |
1105 | if (enable_hooks) | |
1106 | nf_ct_netns_put(net, NFPROTO_INET); | |
1107 | ||
1108 | nf_conntrack_standalone_fini_proc(net); | |
1109 | nf_conntrack_standalone_fini_sysctl(net); | |
1110 | } | |
1111 | ||
1112 | static int nf_conntrack_pernet_init(struct net *net) | |
1113 | { | |
1114 | int ret; | |
1115 | ||
1116 | net->ct.sysctl_checksum = 1; | |
1117 | ||
1118 | ret = nf_conntrack_standalone_init_sysctl(net); | |
1119 | if (ret < 0) | |
1120 | return ret; | |
1121 | ||
1122 | ret = nf_conntrack_standalone_init_proc(net); | |
1123 | if (ret < 0) | |
1124 | goto out_proc; | |
1125 | ||
1126 | ret = nf_conntrack_init_net(net); | |
1127 | if (ret < 0) | |
1128 | goto out_init_net; | |
1129 | ||
1130 | if (enable_hooks) { | |
1131 | ret = nf_ct_netns_get(net, NFPROTO_INET); | |
1132 | if (ret < 0) | |
1133 | goto out_hooks; | |
1134 | } | |
1135 | ||
1136 | return 0; | |
1137 | ||
1138 | out_hooks: | |
1139 | nf_conntrack_cleanup_net(net); | |
1140 | out_init_net: | |
1141 | nf_conntrack_standalone_fini_proc(net); | |
1142 | out_proc: | |
1143 | nf_conntrack_standalone_fini_sysctl(net); | |
1144 | return ret; | |
1145 | } | |
1146 | ||
1147 | static void nf_conntrack_pernet_exit(struct list_head *net_exit_list) | |
1148 | { | |
1149 | struct net *net; | |
1150 | ||
1151 | list_for_each_entry(net, net_exit_list, exit_list) | |
1152 | nf_conntrack_fini_net(net); | |
1153 | ||
1154 | nf_conntrack_cleanup_net_list(net_exit_list); | |
1155 | } | |
1156 | ||
1157 | static struct pernet_operations nf_conntrack_net_ops = { | |
1158 | .init = nf_conntrack_pernet_init, | |
1159 | .exit_batch = nf_conntrack_pernet_exit, | |
1160 | .id = &nf_conntrack_net_id, | |
1161 | .size = sizeof(struct nf_conntrack_net), | |
1162 | }; | |
1163 | ||
1164 | static int __init nf_conntrack_standalone_init(void) | |
1165 | { | |
1166 | int ret = nf_conntrack_init_start(); | |
1167 | if (ret < 0) | |
1168 | goto out_start; | |
1169 | ||
1170 | BUILD_BUG_ON(NFCT_INFOMASK <= IP_CT_NUMBER); | |
1171 | ||
1172 | #ifdef CONFIG_SYSCTL | |
1173 | nf_ct_netfilter_header = | |
1174 | register_net_sysctl(&init_net, "net", nf_ct_netfilter_table); | |
1175 | if (!nf_ct_netfilter_header) { | |
1176 | pr_err("nf_conntrack: can't register to sysctl.\n"); | |
1177 | ret = -ENOMEM; | |
1178 | goto out_sysctl; | |
1179 | } | |
1180 | ||
1181 | nf_conntrack_htable_size_user = nf_conntrack_htable_size; | |
1182 | #endif | |
1183 | ||
1184 | ret = register_pernet_subsys(&nf_conntrack_net_ops); | |
1185 | if (ret < 0) | |
1186 | goto out_pernet; | |
1187 | ||
1188 | nf_conntrack_init_end(); | |
1189 | return 0; | |
1190 | ||
1191 | out_pernet: | |
1192 | #ifdef CONFIG_SYSCTL | |
1193 | unregister_net_sysctl_table(nf_ct_netfilter_header); | |
1194 | out_sysctl: | |
1195 | #endif | |
1196 | nf_conntrack_cleanup_end(); | |
1197 | out_start: | |
1198 | return ret; | |
1199 | } | |
1200 | ||
1201 | static void __exit nf_conntrack_standalone_fini(void) | |
1202 | { | |
1203 | nf_conntrack_cleanup_start(); | |
1204 | unregister_pernet_subsys(&nf_conntrack_net_ops); | |
1205 | #ifdef CONFIG_SYSCTL | |
1206 | unregister_net_sysctl_table(nf_ct_netfilter_header); | |
1207 | #endif | |
1208 | nf_conntrack_cleanup_end(); | |
1209 | } | |
1210 | ||
1211 | module_init(nf_conntrack_standalone_init); | |
1212 | module_exit(nf_conntrack_standalone_fini); |