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>
18 #include <linux/sysctl.h>
21 #include <net/netfilter/nf_conntrack.h>
22 #include <net/netfilter/nf_conntrack_core.h>
23 #include <net/netfilter/nf_conntrack_l3proto.h>
24 #include <net/netfilter/nf_conntrack_l4proto.h>
25 #include <net/netfilter/nf_conntrack_expect.h>
26 #include <net/netfilter/nf_conntrack_helper.h>
31 #define DEBUGP(format, args...)
34 MODULE_LICENSE("GPL");
38 print_tuple(struct seq_file *s, const struct nf_conntrack_tuple *tuple,
39 struct nf_conntrack_l3proto *l3proto,
40 struct nf_conntrack_l4proto *l4proto)
42 return l3proto->print_tuple(s, tuple) || l4proto->print_tuple(s, tuple);
44 EXPORT_SYMBOL_GPL(print_tuple);
46 #ifdef CONFIG_NF_CT_ACCT
48 seq_print_counters(struct seq_file *s,
49 const struct ip_conntrack_counter *counter)
51 return seq_printf(s, "packets=%llu bytes=%llu ",
52 (unsigned long long)counter->packets,
53 (unsigned long long)counter->bytes);
56 #define seq_print_counters(x, y) 0
59 struct ct_iter_state {
63 static struct hlist_node *ct_get_first(struct seq_file *seq)
65 struct ct_iter_state *st = seq->private;
68 st->bucket < nf_conntrack_htable_size;
70 if (!hlist_empty(&nf_conntrack_hash[st->bucket]))
71 return nf_conntrack_hash[st->bucket].first;
76 static struct hlist_node *ct_get_next(struct seq_file *seq,
77 struct hlist_node *head)
79 struct ct_iter_state *st = seq->private;
82 while (head == NULL) {
83 if (++st->bucket >= nf_conntrack_htable_size)
85 head = nf_conntrack_hash[st->bucket].first;
90 static struct hlist_node *ct_get_idx(struct seq_file *seq, loff_t pos)
92 struct hlist_node *head = ct_get_first(seq);
95 while (pos && (head = ct_get_next(seq, head)))
97 return pos ? NULL : head;
100 static void *ct_seq_start(struct seq_file *seq, loff_t *pos)
102 read_lock_bh(&nf_conntrack_lock);
103 return ct_get_idx(seq, *pos);
106 static void *ct_seq_next(struct seq_file *s, void *v, loff_t *pos)
109 return ct_get_next(s, v);
112 static void ct_seq_stop(struct seq_file *s, void *v)
114 read_unlock_bh(&nf_conntrack_lock);
117 /* return 0 on success, 1 in case of error */
118 static int ct_seq_show(struct seq_file *s, void *v)
120 const struct nf_conntrack_tuple_hash *hash = v;
121 const struct nf_conn *conntrack = nf_ct_tuplehash_to_ctrack(hash);
122 struct nf_conntrack_l3proto *l3proto;
123 struct nf_conntrack_l4proto *l4proto;
125 NF_CT_ASSERT(conntrack);
127 /* we only want to print DIR_ORIGINAL */
128 if (NF_CT_DIRECTION(hash))
131 l3proto = __nf_ct_l3proto_find(conntrack->tuplehash[IP_CT_DIR_ORIGINAL]
134 NF_CT_ASSERT(l3proto);
135 l4proto = __nf_ct_l4proto_find(conntrack->tuplehash[IP_CT_DIR_ORIGINAL]
137 conntrack->tuplehash[IP_CT_DIR_ORIGINAL]
138 .tuple.dst.protonum);
139 NF_CT_ASSERT(l4proto);
141 if (seq_printf(s, "%-8s %u %-8s %u %ld ",
143 conntrack->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.l3num,
145 conntrack->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.protonum,
146 timer_pending(&conntrack->timeout)
147 ? (long)(conntrack->timeout.expires - jiffies)/HZ : 0) != 0)
150 if (l3proto->print_conntrack(s, conntrack))
153 if (l4proto->print_conntrack(s, conntrack))
156 if (print_tuple(s, &conntrack->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
160 if (seq_print_counters(s, &conntrack->counters[IP_CT_DIR_ORIGINAL]))
163 if (!(test_bit(IPS_SEEN_REPLY_BIT, &conntrack->status)))
164 if (seq_printf(s, "[UNREPLIED] "))
167 if (print_tuple(s, &conntrack->tuplehash[IP_CT_DIR_REPLY].tuple,
171 if (seq_print_counters(s, &conntrack->counters[IP_CT_DIR_REPLY]))
174 if (test_bit(IPS_ASSURED_BIT, &conntrack->status))
175 if (seq_printf(s, "[ASSURED] "))
178 #if defined(CONFIG_NF_CONNTRACK_MARK)
179 if (seq_printf(s, "mark=%u ", conntrack->mark))
183 #ifdef CONFIG_NF_CONNTRACK_SECMARK
184 if (seq_printf(s, "secmark=%u ", conntrack->secmark))
188 if (seq_printf(s, "use=%u\n", atomic_read(&conntrack->ct_general.use)))
194 static struct seq_operations ct_seq_ops = {
195 .start = ct_seq_start,
201 static int ct_open(struct inode *inode, struct file *file)
203 struct seq_file *seq;
204 struct ct_iter_state *st;
207 st = kmalloc(sizeof(struct ct_iter_state), GFP_KERNEL);
210 ret = seq_open(file, &ct_seq_ops);
213 seq = file->private_data;
215 memset(st, 0, sizeof(struct ct_iter_state));
222 static const struct file_operations ct_file_ops = {
223 .owner = THIS_MODULE,
227 .release = seq_release_private,
230 static void *ct_cpu_seq_start(struct seq_file *seq, loff_t *pos)
235 return SEQ_START_TOKEN;
237 for (cpu = *pos-1; cpu < NR_CPUS; ++cpu) {
238 if (!cpu_possible(cpu))
241 return &per_cpu(nf_conntrack_stat, cpu);
247 static void *ct_cpu_seq_next(struct seq_file *seq, void *v, loff_t *pos)
251 for (cpu = *pos; cpu < NR_CPUS; ++cpu) {
252 if (!cpu_possible(cpu))
255 return &per_cpu(nf_conntrack_stat, cpu);
261 static void ct_cpu_seq_stop(struct seq_file *seq, void *v)
265 static int ct_cpu_seq_show(struct seq_file *seq, void *v)
267 unsigned int nr_conntracks = atomic_read(&nf_conntrack_count);
268 struct ip_conntrack_stat *st = v;
270 if (v == SEQ_START_TOKEN) {
271 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");
275 seq_printf(seq, "%08x %08x %08x %08x %08x %08x %08x %08x "
276 "%08x %08x %08x %08x %08x %08x %08x %08x \n",
298 static struct seq_operations ct_cpu_seq_ops = {
299 .start = ct_cpu_seq_start,
300 .next = ct_cpu_seq_next,
301 .stop = ct_cpu_seq_stop,
302 .show = ct_cpu_seq_show,
305 static int ct_cpu_seq_open(struct inode *inode, struct file *file)
307 return seq_open(file, &ct_cpu_seq_ops);
310 static const struct file_operations ct_cpu_seq_fops = {
311 .owner = THIS_MODULE,
312 .open = ct_cpu_seq_open,
315 .release = seq_release_private,
317 #endif /* CONFIG_PROC_FS */
321 int nf_conntrack_checksum __read_mostly = 1;
322 EXPORT_SYMBOL_GPL(nf_conntrack_checksum);
325 /* Log invalid packets of a given protocol */
326 static int log_invalid_proto_min = 0;
327 static int log_invalid_proto_max = 255;
329 static struct ctl_table_header *nf_ct_sysctl_header;
331 static ctl_table nf_ct_sysctl_table[] = {
333 .ctl_name = NET_NF_CONNTRACK_MAX,
334 .procname = "nf_conntrack_max",
335 .data = &nf_conntrack_max,
336 .maxlen = sizeof(int),
338 .proc_handler = &proc_dointvec,
341 .ctl_name = NET_NF_CONNTRACK_COUNT,
342 .procname = "nf_conntrack_count",
343 .data = &nf_conntrack_count,
344 .maxlen = sizeof(int),
346 .proc_handler = &proc_dointvec,
349 .ctl_name = NET_NF_CONNTRACK_BUCKETS,
350 .procname = "nf_conntrack_buckets",
351 .data = &nf_conntrack_htable_size,
352 .maxlen = sizeof(unsigned int),
354 .proc_handler = &proc_dointvec,
357 .ctl_name = NET_NF_CONNTRACK_CHECKSUM,
358 .procname = "nf_conntrack_checksum",
359 .data = &nf_conntrack_checksum,
360 .maxlen = sizeof(unsigned int),
362 .proc_handler = &proc_dointvec,
365 .ctl_name = NET_NF_CONNTRACK_LOG_INVALID,
366 .procname = "nf_conntrack_log_invalid",
367 .data = &nf_ct_log_invalid,
368 .maxlen = sizeof(unsigned int),
370 .proc_handler = &proc_dointvec_minmax,
371 .strategy = &sysctl_intvec,
372 .extra1 = &log_invalid_proto_min,
373 .extra2 = &log_invalid_proto_max,
379 #define NET_NF_CONNTRACK_MAX 2089
381 static ctl_table nf_ct_netfilter_table[] = {
383 .ctl_name = NET_NETFILTER,
384 .procname = "netfilter",
386 .child = nf_ct_sysctl_table,
389 .ctl_name = NET_NF_CONNTRACK_MAX,
390 .procname = "nf_conntrack_max",
391 .data = &nf_conntrack_max,
392 .maxlen = sizeof(int),
394 .proc_handler = &proc_dointvec,
399 static ctl_table nf_ct_net_table[] = {
404 .child = nf_ct_netfilter_table,
408 EXPORT_SYMBOL_GPL(nf_ct_log_invalid);
409 #endif /* CONFIG_SYSCTL */
411 static int __init nf_conntrack_standalone_init(void)
413 #ifdef CONFIG_PROC_FS
414 struct proc_dir_entry *proc, *proc_exp, *proc_stat;
418 ret = nf_conntrack_init();
422 #ifdef CONFIG_PROC_FS
423 proc = proc_net_fops_create("nf_conntrack", 0440, &ct_file_ops);
424 if (!proc) goto cleanup_init;
426 proc_exp = proc_net_fops_create("nf_conntrack_expect", 0440,
428 if (!proc_exp) goto cleanup_proc;
430 proc_stat = create_proc_entry("nf_conntrack", S_IRUGO, proc_net_stat);
432 goto cleanup_proc_exp;
434 proc_stat->proc_fops = &ct_cpu_seq_fops;
435 proc_stat->owner = THIS_MODULE;
438 nf_ct_sysctl_header = register_sysctl_table(nf_ct_net_table);
439 if (nf_ct_sysctl_header == NULL) {
440 printk("nf_conntrack: can't register to sysctl.\n");
442 goto cleanup_proc_stat;
450 #ifdef CONFIG_PROC_FS
451 remove_proc_entry("nf_conntrack", proc_net_stat);
453 proc_net_remove("nf_conntrack_expect");
455 proc_net_remove("nf_conntrack");
457 #endif /* CNFIG_PROC_FS */
458 nf_conntrack_cleanup();
462 static void __exit nf_conntrack_standalone_fini(void)
465 unregister_sysctl_table(nf_ct_sysctl_header);
467 #ifdef CONFIG_PROC_FS
468 remove_proc_entry("nf_conntrack", proc_net_stat);
469 proc_net_remove("nf_conntrack_expect");
470 proc_net_remove("nf_conntrack");
471 #endif /* CNFIG_PROC_FS */
472 nf_conntrack_cleanup();
475 module_init(nf_conntrack_standalone_init);
476 module_exit(nf_conntrack_standalone_fini);
478 /* Some modules need us, but don't depend directly on any symbol.
479 They should call this. */
480 void need_conntrack(void)
483 EXPORT_SYMBOL_GPL(need_conntrack);