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>
29 MODULE_LICENSE("GPL");
33 print_tuple(struct seq_file *s, const struct nf_conntrack_tuple *tuple,
34 struct nf_conntrack_l3proto *l3proto,
35 struct nf_conntrack_l4proto *l4proto)
37 return l3proto->print_tuple(s, tuple) || l4proto->print_tuple(s, tuple);
39 EXPORT_SYMBOL_GPL(print_tuple);
41 #ifdef CONFIG_NF_CT_ACCT
43 seq_print_counters(struct seq_file *s,
44 const struct ip_conntrack_counter *counter)
46 return seq_printf(s, "packets=%llu bytes=%llu ",
47 (unsigned long long)counter->packets,
48 (unsigned long long)counter->bytes);
51 #define seq_print_counters(x, y) 0
54 struct ct_iter_state {
58 static struct hlist_node *ct_get_first(struct seq_file *seq)
60 struct ct_iter_state *st = seq->private;
63 st->bucket < nf_conntrack_htable_size;
65 if (!hlist_empty(&nf_conntrack_hash[st->bucket]))
66 return nf_conntrack_hash[st->bucket].first;
71 static struct hlist_node *ct_get_next(struct seq_file *seq,
72 struct hlist_node *head)
74 struct ct_iter_state *st = seq->private;
77 while (head == NULL) {
78 if (++st->bucket >= nf_conntrack_htable_size)
80 head = nf_conntrack_hash[st->bucket].first;
85 static struct hlist_node *ct_get_idx(struct seq_file *seq, loff_t pos)
87 struct hlist_node *head = ct_get_first(seq);
90 while (pos && (head = ct_get_next(seq, head)))
92 return pos ? NULL : head;
95 static void *ct_seq_start(struct seq_file *seq, loff_t *pos)
96 __acquires(nf_conntrack_lock)
98 read_lock_bh(&nf_conntrack_lock);
99 return ct_get_idx(seq, *pos);
102 static void *ct_seq_next(struct seq_file *s, void *v, loff_t *pos)
105 return ct_get_next(s, v);
108 static void ct_seq_stop(struct seq_file *s, void *v)
109 __releases(nf_conntrack_lock)
111 read_unlock_bh(&nf_conntrack_lock);
114 /* return 0 on success, 1 in case of error */
115 static int ct_seq_show(struct seq_file *s, void *v)
117 const struct nf_conntrack_tuple_hash *hash = v;
118 const struct nf_conn *conntrack = nf_ct_tuplehash_to_ctrack(hash);
119 struct nf_conntrack_l3proto *l3proto;
120 struct nf_conntrack_l4proto *l4proto;
122 NF_CT_ASSERT(conntrack);
124 /* we only want to print DIR_ORIGINAL */
125 if (NF_CT_DIRECTION(hash))
128 l3proto = __nf_ct_l3proto_find(conntrack->tuplehash[IP_CT_DIR_ORIGINAL]
131 NF_CT_ASSERT(l3proto);
132 l4proto = __nf_ct_l4proto_find(conntrack->tuplehash[IP_CT_DIR_ORIGINAL]
134 conntrack->tuplehash[IP_CT_DIR_ORIGINAL]
135 .tuple.dst.protonum);
136 NF_CT_ASSERT(l4proto);
138 if (seq_printf(s, "%-8s %u %-8s %u %ld ",
140 conntrack->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.l3num,
142 conntrack->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.protonum,
143 timer_pending(&conntrack->timeout)
144 ? (long)(conntrack->timeout.expires - jiffies)/HZ : 0) != 0)
147 if (l4proto->print_conntrack && l4proto->print_conntrack(s, conntrack))
150 if (print_tuple(s, &conntrack->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
154 if (seq_print_counters(s, &conntrack->counters[IP_CT_DIR_ORIGINAL]))
157 if (!(test_bit(IPS_SEEN_REPLY_BIT, &conntrack->status)))
158 if (seq_printf(s, "[UNREPLIED] "))
161 if (print_tuple(s, &conntrack->tuplehash[IP_CT_DIR_REPLY].tuple,
165 if (seq_print_counters(s, &conntrack->counters[IP_CT_DIR_REPLY]))
168 if (test_bit(IPS_ASSURED_BIT, &conntrack->status))
169 if (seq_printf(s, "[ASSURED] "))
172 #if defined(CONFIG_NF_CONNTRACK_MARK)
173 if (seq_printf(s, "mark=%u ", conntrack->mark))
177 #ifdef CONFIG_NF_CONNTRACK_SECMARK
178 if (seq_printf(s, "secmark=%u ", conntrack->secmark))
182 if (seq_printf(s, "use=%u\n", atomic_read(&conntrack->ct_general.use)))
188 static const struct seq_operations ct_seq_ops = {
189 .start = ct_seq_start,
195 static int ct_open(struct inode *inode, struct file *file)
197 return seq_open_private(file, &ct_seq_ops,
198 sizeof(struct ct_iter_state));
201 static const struct file_operations ct_file_ops = {
202 .owner = THIS_MODULE,
206 .release = seq_release_private,
209 static void *ct_cpu_seq_start(struct seq_file *seq, loff_t *pos)
214 return SEQ_START_TOKEN;
216 for (cpu = *pos-1; cpu < NR_CPUS; ++cpu) {
217 if (!cpu_possible(cpu))
220 return &per_cpu(nf_conntrack_stat, cpu);
226 static void *ct_cpu_seq_next(struct seq_file *seq, void *v, loff_t *pos)
230 for (cpu = *pos; cpu < NR_CPUS; ++cpu) {
231 if (!cpu_possible(cpu))
234 return &per_cpu(nf_conntrack_stat, cpu);
240 static void ct_cpu_seq_stop(struct seq_file *seq, void *v)
244 static int ct_cpu_seq_show(struct seq_file *seq, void *v)
246 unsigned int nr_conntracks = atomic_read(&nf_conntrack_count);
247 struct ip_conntrack_stat *st = v;
249 if (v == SEQ_START_TOKEN) {
250 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");
254 seq_printf(seq, "%08x %08x %08x %08x %08x %08x %08x %08x "
255 "%08x %08x %08x %08x %08x %08x %08x %08x \n",
277 static const struct seq_operations ct_cpu_seq_ops = {
278 .start = ct_cpu_seq_start,
279 .next = ct_cpu_seq_next,
280 .stop = ct_cpu_seq_stop,
281 .show = ct_cpu_seq_show,
284 static int ct_cpu_seq_open(struct inode *inode, struct file *file)
286 return seq_open(file, &ct_cpu_seq_ops);
289 static const struct file_operations ct_cpu_seq_fops = {
290 .owner = THIS_MODULE,
291 .open = ct_cpu_seq_open,
294 .release = seq_release_private,
296 #endif /* CONFIG_PROC_FS */
300 int nf_conntrack_checksum __read_mostly = 1;
301 EXPORT_SYMBOL_GPL(nf_conntrack_checksum);
304 /* Log invalid packets of a given protocol */
305 static int log_invalid_proto_min = 0;
306 static int log_invalid_proto_max = 255;
308 static struct ctl_table_header *nf_ct_sysctl_header;
310 static ctl_table nf_ct_sysctl_table[] = {
312 .ctl_name = NET_NF_CONNTRACK_MAX,
313 .procname = "nf_conntrack_max",
314 .data = &nf_conntrack_max,
315 .maxlen = sizeof(int),
317 .proc_handler = &proc_dointvec,
320 .ctl_name = NET_NF_CONNTRACK_COUNT,
321 .procname = "nf_conntrack_count",
322 .data = &nf_conntrack_count,
323 .maxlen = sizeof(int),
325 .proc_handler = &proc_dointvec,
328 .ctl_name = NET_NF_CONNTRACK_BUCKETS,
329 .procname = "nf_conntrack_buckets",
330 .data = &nf_conntrack_htable_size,
331 .maxlen = sizeof(unsigned int),
333 .proc_handler = &proc_dointvec,
336 .ctl_name = NET_NF_CONNTRACK_CHECKSUM,
337 .procname = "nf_conntrack_checksum",
338 .data = &nf_conntrack_checksum,
339 .maxlen = sizeof(unsigned int),
341 .proc_handler = &proc_dointvec,
344 .ctl_name = NET_NF_CONNTRACK_LOG_INVALID,
345 .procname = "nf_conntrack_log_invalid",
346 .data = &nf_ct_log_invalid,
347 .maxlen = sizeof(unsigned int),
349 .proc_handler = &proc_dointvec_minmax,
350 .strategy = &sysctl_intvec,
351 .extra1 = &log_invalid_proto_min,
352 .extra2 = &log_invalid_proto_max,
355 .ctl_name = CTL_UNNUMBERED,
356 .procname = "nf_conntrack_expect_max",
357 .data = &nf_ct_expect_max,
358 .maxlen = sizeof(int),
360 .proc_handler = &proc_dointvec,
365 #define NET_NF_CONNTRACK_MAX 2089
367 static ctl_table nf_ct_netfilter_table[] = {
369 .ctl_name = NET_NETFILTER,
370 .procname = "netfilter",
372 .child = nf_ct_sysctl_table,
375 .ctl_name = NET_NF_CONNTRACK_MAX,
376 .procname = "nf_conntrack_max",
377 .data = &nf_conntrack_max,
378 .maxlen = sizeof(int),
380 .proc_handler = &proc_dointvec,
385 struct ctl_path nf_ct_path[] = {
386 { .procname = "net", .ctl_name = CTL_NET, },
390 EXPORT_SYMBOL_GPL(nf_ct_log_invalid);
391 #endif /* CONFIG_SYSCTL */
393 static int __init nf_conntrack_standalone_init(void)
395 #ifdef CONFIG_PROC_FS
396 struct proc_dir_entry *proc, *proc_stat;
400 ret = nf_conntrack_init();
404 #ifdef CONFIG_PROC_FS
405 proc = proc_net_fops_create(&init_net, "nf_conntrack", 0440, &ct_file_ops);
406 if (!proc) goto cleanup_init;
408 proc_stat = create_proc_entry("nf_conntrack", S_IRUGO, init_net.proc_net_stat);
412 proc_stat->proc_fops = &ct_cpu_seq_fops;
413 proc_stat->owner = THIS_MODULE;
416 nf_ct_sysctl_header = register_sysctl_paths(nf_ct_path,
417 nf_ct_netfilter_table);
418 if (nf_ct_sysctl_header == NULL) {
419 printk("nf_conntrack: can't register to sysctl.\n");
421 goto cleanup_proc_stat;
429 #ifdef CONFIG_PROC_FS
430 remove_proc_entry("nf_conntrack", init_net. proc_net_stat);
432 proc_net_remove(&init_net, "nf_conntrack");
434 #endif /* CNFIG_PROC_FS */
435 nf_conntrack_cleanup();
439 static void __exit nf_conntrack_standalone_fini(void)
442 unregister_sysctl_table(nf_ct_sysctl_header);
444 #ifdef CONFIG_PROC_FS
445 remove_proc_entry("nf_conntrack", init_net.proc_net_stat);
446 proc_net_remove(&init_net, "nf_conntrack");
447 #endif /* CNFIG_PROC_FS */
448 nf_conntrack_cleanup();
451 module_init(nf_conntrack_standalone_init);
452 module_exit(nf_conntrack_standalone_fini);
454 /* Some modules need us, but don't depend directly on any symbol.
455 They should call this. */
456 void need_conntrack(void)
459 EXPORT_SYMBOL_GPL(need_conntrack);