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
)
97 read_lock_bh(&nf_conntrack_lock
);
98 return ct_get_idx(seq
, *pos
);
101 static void *ct_seq_next(struct seq_file
*s
, void *v
, loff_t
*pos
)
104 return ct_get_next(s
, v
);
107 static void ct_seq_stop(struct seq_file
*s
, void *v
)
109 read_unlock_bh(&nf_conntrack_lock
);
112 /* return 0 on success, 1 in case of error */
113 static int ct_seq_show(struct seq_file
*s
, void *v
)
115 const struct nf_conntrack_tuple_hash
*hash
= v
;
116 const struct nf_conn
*conntrack
= nf_ct_tuplehash_to_ctrack(hash
);
117 struct nf_conntrack_l3proto
*l3proto
;
118 struct nf_conntrack_l4proto
*l4proto
;
120 NF_CT_ASSERT(conntrack
);
122 /* we only want to print DIR_ORIGINAL */
123 if (NF_CT_DIRECTION(hash
))
126 l3proto
= __nf_ct_l3proto_find(conntrack
->tuplehash
[IP_CT_DIR_ORIGINAL
]
129 NF_CT_ASSERT(l3proto
);
130 l4proto
= __nf_ct_l4proto_find(conntrack
->tuplehash
[IP_CT_DIR_ORIGINAL
]
132 conntrack
->tuplehash
[IP_CT_DIR_ORIGINAL
]
133 .tuple
.dst
.protonum
);
134 NF_CT_ASSERT(l4proto
);
136 if (seq_printf(s
, "%-8s %u %-8s %u %ld ",
138 conntrack
->tuplehash
[IP_CT_DIR_ORIGINAL
].tuple
.src
.l3num
,
140 conntrack
->tuplehash
[IP_CT_DIR_ORIGINAL
].tuple
.dst
.protonum
,
141 timer_pending(&conntrack
->timeout
)
142 ? (long)(conntrack
->timeout
.expires
- jiffies
)/HZ
: 0) != 0)
145 if (l3proto
->print_conntrack(s
, conntrack
))
148 if (l4proto
->print_conntrack(s
, conntrack
))
151 if (print_tuple(s
, &conntrack
->tuplehash
[IP_CT_DIR_ORIGINAL
].tuple
,
155 if (seq_print_counters(s
, &conntrack
->counters
[IP_CT_DIR_ORIGINAL
]))
158 if (!(test_bit(IPS_SEEN_REPLY_BIT
, &conntrack
->status
)))
159 if (seq_printf(s
, "[UNREPLIED] "))
162 if (print_tuple(s
, &conntrack
->tuplehash
[IP_CT_DIR_REPLY
].tuple
,
166 if (seq_print_counters(s
, &conntrack
->counters
[IP_CT_DIR_REPLY
]))
169 if (test_bit(IPS_ASSURED_BIT
, &conntrack
->status
))
170 if (seq_printf(s
, "[ASSURED] "))
173 #if defined(CONFIG_NF_CONNTRACK_MARK)
174 if (seq_printf(s
, "mark=%u ", conntrack
->mark
))
178 #ifdef CONFIG_NF_CONNTRACK_SECMARK
179 if (seq_printf(s
, "secmark=%u ", conntrack
->secmark
))
183 if (seq_printf(s
, "use=%u\n", atomic_read(&conntrack
->ct_general
.use
)))
189 static const struct seq_operations ct_seq_ops
= {
190 .start
= ct_seq_start
,
196 static int ct_open(struct inode
*inode
, struct file
*file
)
198 return seq_open_private(file
, &ct_seq_ops
,
199 sizeof(struct ct_iter_state
));
202 static const struct file_operations ct_file_ops
= {
203 .owner
= THIS_MODULE
,
207 .release
= seq_release_private
,
210 static void *ct_cpu_seq_start(struct seq_file
*seq
, loff_t
*pos
)
215 return SEQ_START_TOKEN
;
217 for (cpu
= *pos
-1; cpu
< NR_CPUS
; ++cpu
) {
218 if (!cpu_possible(cpu
))
221 return &per_cpu(nf_conntrack_stat
, cpu
);
227 static void *ct_cpu_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
231 for (cpu
= *pos
; cpu
< NR_CPUS
; ++cpu
) {
232 if (!cpu_possible(cpu
))
235 return &per_cpu(nf_conntrack_stat
, cpu
);
241 static void ct_cpu_seq_stop(struct seq_file
*seq
, void *v
)
245 static int ct_cpu_seq_show(struct seq_file
*seq
, void *v
)
247 unsigned int nr_conntracks
= atomic_read(&nf_conntrack_count
);
248 struct ip_conntrack_stat
*st
= v
;
250 if (v
== SEQ_START_TOKEN
) {
251 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");
255 seq_printf(seq
, "%08x %08x %08x %08x %08x %08x %08x %08x "
256 "%08x %08x %08x %08x %08x %08x %08x %08x \n",
278 static const struct seq_operations ct_cpu_seq_ops
= {
279 .start
= ct_cpu_seq_start
,
280 .next
= ct_cpu_seq_next
,
281 .stop
= ct_cpu_seq_stop
,
282 .show
= ct_cpu_seq_show
,
285 static int ct_cpu_seq_open(struct inode
*inode
, struct file
*file
)
287 return seq_open(file
, &ct_cpu_seq_ops
);
290 static const struct file_operations ct_cpu_seq_fops
= {
291 .owner
= THIS_MODULE
,
292 .open
= ct_cpu_seq_open
,
295 .release
= seq_release_private
,
297 #endif /* CONFIG_PROC_FS */
301 int nf_conntrack_checksum __read_mostly
= 1;
302 EXPORT_SYMBOL_GPL(nf_conntrack_checksum
);
305 /* Log invalid packets of a given protocol */
306 static int log_invalid_proto_min
= 0;
307 static int log_invalid_proto_max
= 255;
309 static struct ctl_table_header
*nf_ct_sysctl_header
;
311 static ctl_table nf_ct_sysctl_table
[] = {
313 .ctl_name
= NET_NF_CONNTRACK_MAX
,
314 .procname
= "nf_conntrack_max",
315 .data
= &nf_conntrack_max
,
316 .maxlen
= sizeof(int),
318 .proc_handler
= &proc_dointvec
,
321 .ctl_name
= NET_NF_CONNTRACK_COUNT
,
322 .procname
= "nf_conntrack_count",
323 .data
= &nf_conntrack_count
,
324 .maxlen
= sizeof(int),
326 .proc_handler
= &proc_dointvec
,
329 .ctl_name
= NET_NF_CONNTRACK_BUCKETS
,
330 .procname
= "nf_conntrack_buckets",
331 .data
= &nf_conntrack_htable_size
,
332 .maxlen
= sizeof(unsigned int),
334 .proc_handler
= &proc_dointvec
,
337 .ctl_name
= NET_NF_CONNTRACK_CHECKSUM
,
338 .procname
= "nf_conntrack_checksum",
339 .data
= &nf_conntrack_checksum
,
340 .maxlen
= sizeof(unsigned int),
342 .proc_handler
= &proc_dointvec
,
345 .ctl_name
= NET_NF_CONNTRACK_LOG_INVALID
,
346 .procname
= "nf_conntrack_log_invalid",
347 .data
= &nf_ct_log_invalid
,
348 .maxlen
= sizeof(unsigned int),
350 .proc_handler
= &proc_dointvec_minmax
,
351 .strategy
= &sysctl_intvec
,
352 .extra1
= &log_invalid_proto_min
,
353 .extra2
= &log_invalid_proto_max
,
356 .ctl_name
= CTL_UNNUMBERED
,
357 .procname
= "nf_conntrack_expect_max",
358 .data
= &nf_ct_expect_max
,
359 .maxlen
= sizeof(int),
361 .proc_handler
= &proc_dointvec
,
366 #define NET_NF_CONNTRACK_MAX 2089
368 static ctl_table nf_ct_netfilter_table
[] = {
370 .ctl_name
= NET_NETFILTER
,
371 .procname
= "netfilter",
373 .child
= nf_ct_sysctl_table
,
376 .ctl_name
= NET_NF_CONNTRACK_MAX
,
377 .procname
= "nf_conntrack_max",
378 .data
= &nf_conntrack_max
,
379 .maxlen
= sizeof(int),
381 .proc_handler
= &proc_dointvec
,
386 static ctl_table nf_ct_net_table
[] = {
391 .child
= nf_ct_netfilter_table
,
395 EXPORT_SYMBOL_GPL(nf_ct_log_invalid
);
396 #endif /* CONFIG_SYSCTL */
398 static int __init
nf_conntrack_standalone_init(void)
400 #ifdef CONFIG_PROC_FS
401 struct proc_dir_entry
*proc
, *proc_stat
;
405 ret
= nf_conntrack_init();
409 #ifdef CONFIG_PROC_FS
410 proc
= proc_net_fops_create(&init_net
, "nf_conntrack", 0440, &ct_file_ops
);
411 if (!proc
) goto cleanup_init
;
413 proc_stat
= create_proc_entry("nf_conntrack", S_IRUGO
, init_net
.proc_net_stat
);
417 proc_stat
->proc_fops
= &ct_cpu_seq_fops
;
418 proc_stat
->owner
= THIS_MODULE
;
421 nf_ct_sysctl_header
= register_sysctl_table(nf_ct_net_table
);
422 if (nf_ct_sysctl_header
== NULL
) {
423 printk("nf_conntrack: can't register to sysctl.\n");
425 goto cleanup_proc_stat
;
433 #ifdef CONFIG_PROC_FS
434 remove_proc_entry("nf_conntrack", init_net
. proc_net_stat
);
436 proc_net_remove(&init_net
, "nf_conntrack");
438 #endif /* CNFIG_PROC_FS */
439 nf_conntrack_cleanup();
443 static void __exit
nf_conntrack_standalone_fini(void)
446 unregister_sysctl_table(nf_ct_sysctl_header
);
448 #ifdef CONFIG_PROC_FS
449 remove_proc_entry("nf_conntrack", init_net
.proc_net_stat
);
450 proc_net_remove(&init_net
, "nf_conntrack");
451 #endif /* CNFIG_PROC_FS */
452 nf_conntrack_cleanup();
455 module_init(nf_conntrack_standalone_init
);
456 module_exit(nf_conntrack_standalone_fini
);
458 /* Some modules need us, but don't depend directly on any symbol.
459 They should call this. */
460 void need_conntrack(void)
463 EXPORT_SYMBOL_GPL(need_conntrack
);