1 /* (C) 1999-2001 Paul `Rusty' Russell
2 * (C) 2002-2004 Netfilter Core Team <coreteam@netfilter.org>
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.
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>
17 #include <net/net_namespace.h>
19 #include <linux/sysctl.h>
22 #include <net/netfilter/nf_conntrack.h>
23 #include <net/netfilter/nf_conntrack_core.h>
24 #include <net/netfilter/nf_conntrack_l3proto.h>
25 #include <net/netfilter/nf_conntrack_l4proto.h>
26 #include <net/netfilter/nf_conntrack_expect.h>
27 #include <net/netfilter/nf_conntrack_helper.h>
28 #include <net/netfilter/nf_conntrack_acct.h>
30 MODULE_LICENSE("GPL");
34 print_tuple(struct seq_file *s, const struct nf_conntrack_tuple *tuple,
35 const struct nf_conntrack_l3proto *l3proto,
36 const struct nf_conntrack_l4proto *l4proto)
38 return l3proto->print_tuple(s, tuple) || l4proto->print_tuple(s, tuple);
40 EXPORT_SYMBOL_GPL(print_tuple);
42 struct ct_iter_state {
46 static struct hlist_node *ct_get_first(struct seq_file *seq)
48 struct ct_iter_state *st = seq->private;
52 st->bucket < nf_conntrack_htable_size;
54 n = rcu_dereference(nf_conntrack_hash[st->bucket].first);
61 static struct hlist_node *ct_get_next(struct seq_file *seq,
62 struct hlist_node *head)
64 struct ct_iter_state *st = seq->private;
66 head = rcu_dereference(head->next);
67 while (head == NULL) {
68 if (++st->bucket >= nf_conntrack_htable_size)
70 head = rcu_dereference(nf_conntrack_hash[st->bucket].first);
75 static struct hlist_node *ct_get_idx(struct seq_file *seq, loff_t pos)
77 struct hlist_node *head = ct_get_first(seq);
80 while (pos && (head = ct_get_next(seq, head)))
82 return pos ? NULL : head;
85 static void *ct_seq_start(struct seq_file *seq, loff_t *pos)
89 return ct_get_idx(seq, *pos);
92 static void *ct_seq_next(struct seq_file *s, void *v, loff_t *pos)
95 return ct_get_next(s, v);
98 static void ct_seq_stop(struct seq_file *s, void *v)
104 /* return 0 on success, 1 in case of error */
105 static int ct_seq_show(struct seq_file *s, void *v)
107 const struct nf_conntrack_tuple_hash *hash = v;
108 const struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(hash);
109 const struct nf_conntrack_l3proto *l3proto;
110 const struct nf_conntrack_l4proto *l4proto;
114 /* we only want to print DIR_ORIGINAL */
115 if (NF_CT_DIRECTION(hash))
118 l3proto = __nf_ct_l3proto_find(nf_ct_l3num(ct));
119 NF_CT_ASSERT(l3proto);
120 l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct));
121 NF_CT_ASSERT(l4proto);
123 if (seq_printf(s, "%-8s %u %-8s %u %ld ",
124 l3proto->name, nf_ct_l3num(ct),
125 l4proto->name, nf_ct_protonum(ct),
126 timer_pending(&ct->timeout)
127 ? (long)(ct->timeout.expires - jiffies)/HZ : 0) != 0)
130 if (l4proto->print_conntrack && l4proto->print_conntrack(s, ct))
133 if (print_tuple(s, &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
137 if (seq_print_acct(s, ct, IP_CT_DIR_ORIGINAL))
140 if (!(test_bit(IPS_SEEN_REPLY_BIT, &ct->status)))
141 if (seq_printf(s, "[UNREPLIED] "))
144 if (print_tuple(s, &ct->tuplehash[IP_CT_DIR_REPLY].tuple,
148 if (seq_print_acct(s, ct, IP_CT_DIR_REPLY))
151 if (test_bit(IPS_ASSURED_BIT, &ct->status))
152 if (seq_printf(s, "[ASSURED] "))
155 #if defined(CONFIG_NF_CONNTRACK_MARK)
156 if (seq_printf(s, "mark=%u ", ct->mark))
160 #ifdef CONFIG_NF_CONNTRACK_SECMARK
161 if (seq_printf(s, "secmark=%u ", ct->secmark))
165 if (seq_printf(s, "use=%u\n", atomic_read(&ct->ct_general.use)))
171 static const struct seq_operations ct_seq_ops = {
172 .start = ct_seq_start,
178 static int ct_open(struct inode *inode, struct file *file)
180 return seq_open_private(file, &ct_seq_ops,
181 sizeof(struct ct_iter_state));
184 static const struct file_operations ct_file_ops = {
185 .owner = THIS_MODULE,
189 .release = seq_release_private,
192 static void *ct_cpu_seq_start(struct seq_file *seq, loff_t *pos)
197 return SEQ_START_TOKEN;
199 for (cpu = *pos-1; cpu < NR_CPUS; ++cpu) {
200 if (!cpu_possible(cpu))
203 return &per_cpu(nf_conntrack_stat, cpu);
209 static void *ct_cpu_seq_next(struct seq_file *seq, void *v, loff_t *pos)
213 for (cpu = *pos; cpu < NR_CPUS; ++cpu) {
214 if (!cpu_possible(cpu))
217 return &per_cpu(nf_conntrack_stat, cpu);
223 static void ct_cpu_seq_stop(struct seq_file *seq, void *v)
227 static int ct_cpu_seq_show(struct seq_file *seq, void *v)
229 unsigned int nr_conntracks = atomic_read(&nf_conntrack_count);
230 const struct ip_conntrack_stat *st = v;
232 if (v == SEQ_START_TOKEN) {
233 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");
237 seq_printf(seq, "%08x %08x %08x %08x %08x %08x %08x %08x "
238 "%08x %08x %08x %08x %08x %08x %08x %08x \n",
260 static const struct seq_operations ct_cpu_seq_ops = {
261 .start = ct_cpu_seq_start,
262 .next = ct_cpu_seq_next,
263 .stop = ct_cpu_seq_stop,
264 .show = ct_cpu_seq_show,
267 static int ct_cpu_seq_open(struct inode *inode, struct file *file)
269 return seq_open(file, &ct_cpu_seq_ops);
272 static const struct file_operations ct_cpu_seq_fops = {
273 .owner = THIS_MODULE,
274 .open = ct_cpu_seq_open,
277 .release = seq_release,
280 static int nf_conntrack_standalone_init_proc(void)
282 struct proc_dir_entry *pde;
284 pde = proc_net_fops_create(&init_net, "nf_conntrack", 0440, &ct_file_ops);
286 goto out_nf_conntrack;
288 pde = proc_create("nf_conntrack", S_IRUGO, init_net.proc_net_stat,
291 goto out_stat_nf_conntrack;
294 out_stat_nf_conntrack:
295 proc_net_remove(&init_net, "nf_conntrack");
300 static void nf_conntrack_standalone_fini_proc(void)
302 remove_proc_entry("nf_conntrack", init_net.proc_net_stat);
303 proc_net_remove(&init_net, "nf_conntrack");
306 static int nf_conntrack_standalone_init_proc(void)
311 static void nf_conntrack_standalone_fini_proc(void)
314 #endif /* CONFIG_PROC_FS */
318 int nf_conntrack_checksum __read_mostly = 1;
319 EXPORT_SYMBOL_GPL(nf_conntrack_checksum);
322 /* Log invalid packets of a given protocol */
323 static int log_invalid_proto_min = 0;
324 static int log_invalid_proto_max = 255;
326 static struct ctl_table_header *nf_ct_sysctl_header;
327 static struct ctl_table_header *nf_ct_netfilter_header;
329 static ctl_table nf_ct_sysctl_table[] = {
331 .ctl_name = NET_NF_CONNTRACK_MAX,
332 .procname = "nf_conntrack_max",
333 .data = &nf_conntrack_max,
334 .maxlen = sizeof(int),
336 .proc_handler = &proc_dointvec,
339 .ctl_name = NET_NF_CONNTRACK_COUNT,
340 .procname = "nf_conntrack_count",
341 .data = &nf_conntrack_count,
342 .maxlen = sizeof(int),
344 .proc_handler = &proc_dointvec,
347 .ctl_name = NET_NF_CONNTRACK_BUCKETS,
348 .procname = "nf_conntrack_buckets",
349 .data = &nf_conntrack_htable_size,
350 .maxlen = sizeof(unsigned int),
352 .proc_handler = &proc_dointvec,
355 .ctl_name = NET_NF_CONNTRACK_CHECKSUM,
356 .procname = "nf_conntrack_checksum",
357 .data = &nf_conntrack_checksum,
358 .maxlen = sizeof(unsigned int),
360 .proc_handler = &proc_dointvec,
363 .ctl_name = NET_NF_CONNTRACK_LOG_INVALID,
364 .procname = "nf_conntrack_log_invalid",
365 .data = &nf_ct_log_invalid,
366 .maxlen = sizeof(unsigned int),
368 .proc_handler = &proc_dointvec_minmax,
369 .strategy = &sysctl_intvec,
370 .extra1 = &log_invalid_proto_min,
371 .extra2 = &log_invalid_proto_max,
374 .ctl_name = CTL_UNNUMBERED,
375 .procname = "nf_conntrack_expect_max",
376 .data = &nf_ct_expect_max,
377 .maxlen = sizeof(int),
379 .proc_handler = &proc_dointvec,
384 #define NET_NF_CONNTRACK_MAX 2089
386 static ctl_table nf_ct_netfilter_table[] = {
388 .ctl_name = NET_NF_CONNTRACK_MAX,
389 .procname = "nf_conntrack_max",
390 .data = &nf_conntrack_max,
391 .maxlen = sizeof(int),
393 .proc_handler = &proc_dointvec,
398 static struct ctl_path nf_ct_path[] = {
399 { .procname = "net", .ctl_name = CTL_NET, },
403 EXPORT_SYMBOL_GPL(nf_ct_log_invalid);
405 static int nf_conntrack_standalone_init_sysctl(void)
407 nf_ct_netfilter_header =
408 register_sysctl_paths(nf_ct_path, nf_ct_netfilter_table);
409 if (!nf_ct_netfilter_header)
412 nf_ct_sysctl_header =
413 register_sysctl_paths(nf_net_netfilter_sysctl_path,
415 if (!nf_ct_sysctl_header)
416 goto out_unregister_netfilter;
420 out_unregister_netfilter:
421 unregister_sysctl_table(nf_ct_netfilter_header);
423 printk("nf_conntrack: can't register to sysctl.\n");
427 static void nf_conntrack_standalone_fini_sysctl(void)
429 unregister_sysctl_table(nf_ct_netfilter_header);
430 unregister_sysctl_table(nf_ct_sysctl_header);
433 static int nf_conntrack_standalone_init_sysctl(void)
438 static void nf_conntrack_standalone_fini_sysctl(void)
441 #endif /* CONFIG_SYSCTL */
443 static int __init nf_conntrack_standalone_init(void)
447 ret = nf_conntrack_init();
450 ret = nf_conntrack_standalone_init_proc();
453 ret = nf_conntrack_standalone_init_sysctl();
459 nf_conntrack_standalone_fini_proc();
461 nf_conntrack_cleanup();
466 static void __exit nf_conntrack_standalone_fini(void)
468 nf_conntrack_standalone_fini_sysctl();
469 nf_conntrack_standalone_fini_proc();
470 nf_conntrack_cleanup();
473 module_init(nf_conntrack_standalone_init);
474 module_exit(nf_conntrack_standalone_fini);
476 /* Some modules need us, but don't depend directly on any symbol.
477 They should call this. */
478 void need_conntrack(void)
481 EXPORT_SYMBOL_GPL(need_conntrack);