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 const struct nf_conntrack_l3proto
*l3proto
,
35 const 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;
64 st
->bucket
< nf_conntrack_htable_size
;
66 n
= rcu_dereference(nf_conntrack_hash
[st
->bucket
].first
);
73 static struct hlist_node
*ct_get_next(struct seq_file
*seq
,
74 struct hlist_node
*head
)
76 struct ct_iter_state
*st
= seq
->private;
78 head
= rcu_dereference(head
->next
);
79 while (head
== NULL
) {
80 if (++st
->bucket
>= nf_conntrack_htable_size
)
82 head
= rcu_dereference(nf_conntrack_hash
[st
->bucket
].first
);
87 static struct hlist_node
*ct_get_idx(struct seq_file
*seq
, loff_t pos
)
89 struct hlist_node
*head
= ct_get_first(seq
);
92 while (pos
&& (head
= ct_get_next(seq
, head
)))
94 return pos
? NULL
: head
;
97 static void *ct_seq_start(struct seq_file
*seq
, loff_t
*pos
)
101 return ct_get_idx(seq
, *pos
);
104 static void *ct_seq_next(struct seq_file
*s
, void *v
, loff_t
*pos
)
107 return ct_get_next(s
, v
);
110 static void ct_seq_stop(struct seq_file
*s
, void *v
)
116 /* return 0 on success, 1 in case of error */
117 static int ct_seq_show(struct seq_file
*s
, void *v
)
119 const struct nf_conntrack_tuple_hash
*hash
= v
;
120 const struct nf_conn
*ct
= nf_ct_tuplehash_to_ctrack(hash
);
121 const struct nf_conntrack_l3proto
*l3proto
;
122 const struct nf_conntrack_l4proto
*l4proto
;
126 /* we only want to print DIR_ORIGINAL */
127 if (NF_CT_DIRECTION(hash
))
130 l3proto
= __nf_ct_l3proto_find(nf_ct_l3num(ct
));
131 NF_CT_ASSERT(l3proto
);
132 l4proto
= __nf_ct_l4proto_find(nf_ct_l3num(ct
), nf_ct_protonum(ct
));
133 NF_CT_ASSERT(l4proto
);
135 if (seq_printf(s
, "%-8s %u %-8s %u %ld ",
136 l3proto
->name
, nf_ct_l3num(ct
),
137 l4proto
->name
, nf_ct_protonum(ct
),
138 timer_pending(&ct
->timeout
)
139 ? (long)(ct
->timeout
.expires
- jiffies
)/HZ
: 0) != 0)
142 if (l4proto
->print_conntrack
&& l4proto
->print_conntrack(s
, ct
))
145 if (print_tuple(s
, &ct
->tuplehash
[IP_CT_DIR_ORIGINAL
].tuple
,
149 if (seq_print_counters(s
, &ct
->counters
[IP_CT_DIR_ORIGINAL
]))
152 if (!(test_bit(IPS_SEEN_REPLY_BIT
, &ct
->status
)))
153 if (seq_printf(s
, "[UNREPLIED] "))
156 if (print_tuple(s
, &ct
->tuplehash
[IP_CT_DIR_REPLY
].tuple
,
160 if (seq_print_counters(s
, &ct
->counters
[IP_CT_DIR_REPLY
]))
163 if (test_bit(IPS_ASSURED_BIT
, &ct
->status
))
164 if (seq_printf(s
, "[ASSURED] "))
167 #if defined(CONFIG_NF_CONNTRACK_MARK)
168 if (seq_printf(s
, "mark=%u ", ct
->mark
))
172 #ifdef CONFIG_NF_CONNTRACK_SECMARK
173 if (seq_printf(s
, "secmark=%u ", ct
->secmark
))
177 if (seq_printf(s
, "use=%u\n", atomic_read(&ct
->ct_general
.use
)))
183 static const struct seq_operations ct_seq_ops
= {
184 .start
= ct_seq_start
,
190 static int ct_open(struct inode
*inode
, struct file
*file
)
192 return seq_open_private(file
, &ct_seq_ops
,
193 sizeof(struct ct_iter_state
));
196 static const struct file_operations ct_file_ops
= {
197 .owner
= THIS_MODULE
,
201 .release
= seq_release_private
,
204 static void *ct_cpu_seq_start(struct seq_file
*seq
, loff_t
*pos
)
209 return SEQ_START_TOKEN
;
211 for (cpu
= *pos
-1; cpu
< NR_CPUS
; ++cpu
) {
212 if (!cpu_possible(cpu
))
215 return &per_cpu(nf_conntrack_stat
, cpu
);
221 static void *ct_cpu_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
225 for (cpu
= *pos
; cpu
< NR_CPUS
; ++cpu
) {
226 if (!cpu_possible(cpu
))
229 return &per_cpu(nf_conntrack_stat
, cpu
);
235 static void ct_cpu_seq_stop(struct seq_file
*seq
, void *v
)
239 static int ct_cpu_seq_show(struct seq_file
*seq
, void *v
)
241 unsigned int nr_conntracks
= atomic_read(&nf_conntrack_count
);
242 const struct ip_conntrack_stat
*st
= v
;
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");
249 seq_printf(seq
, "%08x %08x %08x %08x %08x %08x %08x %08x "
250 "%08x %08x %08x %08x %08x %08x %08x %08x \n",
272 static const struct seq_operations ct_cpu_seq_ops
= {
273 .start
= ct_cpu_seq_start
,
274 .next
= ct_cpu_seq_next
,
275 .stop
= ct_cpu_seq_stop
,
276 .show
= ct_cpu_seq_show
,
279 static int ct_cpu_seq_open(struct inode
*inode
, struct file
*file
)
281 return seq_open(file
, &ct_cpu_seq_ops
);
284 static const struct file_operations ct_cpu_seq_fops
= {
285 .owner
= THIS_MODULE
,
286 .open
= ct_cpu_seq_open
,
289 .release
= seq_release
,
292 static int nf_conntrack_standalone_init_proc(void)
294 struct proc_dir_entry
*pde
;
296 pde
= proc_net_fops_create(&init_net
, "nf_conntrack", 0440, &ct_file_ops
);
298 goto out_nf_conntrack
;
300 pde
= proc_create("nf_conntrack", S_IRUGO
, init_net
.proc_net_stat
,
303 goto out_stat_nf_conntrack
;
306 out_stat_nf_conntrack
:
307 proc_net_remove(&init_net
, "nf_conntrack");
312 static void nf_conntrack_standalone_fini_proc(void)
314 remove_proc_entry("nf_conntrack", init_net
.proc_net_stat
);
315 proc_net_remove(&init_net
, "nf_conntrack");
318 static int nf_conntrack_standalone_init_proc(void)
323 static void nf_conntrack_standalone_fini_proc(void)
326 #endif /* CONFIG_PROC_FS */
330 int nf_conntrack_checksum __read_mostly
= 1;
331 EXPORT_SYMBOL_GPL(nf_conntrack_checksum
);
334 /* Log invalid packets of a given protocol */
335 static int log_invalid_proto_min
= 0;
336 static int log_invalid_proto_max
= 255;
338 static struct ctl_table_header
*nf_ct_sysctl_header
;
340 static ctl_table nf_ct_sysctl_table
[] = {
342 .ctl_name
= NET_NF_CONNTRACK_MAX
,
343 .procname
= "nf_conntrack_max",
344 .data
= &nf_conntrack_max
,
345 .maxlen
= sizeof(int),
347 .proc_handler
= &proc_dointvec
,
350 .ctl_name
= NET_NF_CONNTRACK_COUNT
,
351 .procname
= "nf_conntrack_count",
352 .data
= &nf_conntrack_count
,
353 .maxlen
= sizeof(int),
355 .proc_handler
= &proc_dointvec
,
358 .ctl_name
= NET_NF_CONNTRACK_BUCKETS
,
359 .procname
= "nf_conntrack_buckets",
360 .data
= &nf_conntrack_htable_size
,
361 .maxlen
= sizeof(unsigned int),
363 .proc_handler
= &proc_dointvec
,
366 .ctl_name
= NET_NF_CONNTRACK_CHECKSUM
,
367 .procname
= "nf_conntrack_checksum",
368 .data
= &nf_conntrack_checksum
,
369 .maxlen
= sizeof(unsigned int),
371 .proc_handler
= &proc_dointvec
,
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),
379 .proc_handler
= &proc_dointvec_minmax
,
380 .strategy
= &sysctl_intvec
,
381 .extra1
= &log_invalid_proto_min
,
382 .extra2
= &log_invalid_proto_max
,
385 .ctl_name
= CTL_UNNUMBERED
,
386 .procname
= "nf_conntrack_expect_max",
387 .data
= &nf_ct_expect_max
,
388 .maxlen
= sizeof(int),
390 .proc_handler
= &proc_dointvec
,
395 #define NET_NF_CONNTRACK_MAX 2089
397 static ctl_table nf_ct_netfilter_table
[] = {
399 .ctl_name
= NET_NETFILTER
,
400 .procname
= "netfilter",
402 .child
= nf_ct_sysctl_table
,
405 .ctl_name
= NET_NF_CONNTRACK_MAX
,
406 .procname
= "nf_conntrack_max",
407 .data
= &nf_conntrack_max
,
408 .maxlen
= sizeof(int),
410 .proc_handler
= &proc_dointvec
,
415 static struct ctl_path nf_ct_path
[] = {
416 { .procname
= "net", .ctl_name
= CTL_NET
, },
420 EXPORT_SYMBOL_GPL(nf_ct_log_invalid
);
422 static int nf_conntrack_standalone_init_sysctl(void)
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");
434 static void nf_conntrack_standalone_fini_sysctl(void)
436 unregister_sysctl_table(nf_ct_sysctl_header
);
439 static int nf_conntrack_standalone_init_sysctl(void)
444 static void nf_conntrack_standalone_fini_sysctl(void)
447 #endif /* CONFIG_SYSCTL */
449 static int __init
nf_conntrack_standalone_init(void)
453 ret
= nf_conntrack_init();
456 ret
= nf_conntrack_standalone_init_proc();
459 ret
= nf_conntrack_standalone_init_sysctl();
465 nf_conntrack_standalone_fini_proc();
467 nf_conntrack_cleanup();
472 static void __exit
nf_conntrack_standalone_fini(void)
474 nf_conntrack_standalone_fini_sysctl();
475 nf_conntrack_standalone_fini_proc();
476 nf_conntrack_cleanup();
479 module_init(nf_conntrack_standalone_init
);
480 module_exit(nf_conntrack_standalone_fini
);
482 /* Some modules need us, but don't depend directly on any symbol.
483 They should call this. */
484 void need_conntrack(void)
487 EXPORT_SYMBOL_GPL(need_conntrack
);