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>
28 MODULE_LICENSE("GPL");
32 print_tuple(struct seq_file
*s
, const struct nf_conntrack_tuple
*tuple
,
33 struct nf_conntrack_l3proto
*l3proto
,
34 struct nf_conntrack_l4proto
*l4proto
)
36 return l3proto
->print_tuple(s
, tuple
) || l4proto
->print_tuple(s
, tuple
);
38 EXPORT_SYMBOL_GPL(print_tuple
);
40 #ifdef CONFIG_NF_CT_ACCT
42 seq_print_counters(struct seq_file
*s
,
43 const struct ip_conntrack_counter
*counter
)
45 return seq_printf(s
, "packets=%llu bytes=%llu ",
46 (unsigned long long)counter
->packets
,
47 (unsigned long long)counter
->bytes
);
50 #define seq_print_counters(x, y) 0
53 struct ct_iter_state
{
57 static struct hlist_node
*ct_get_first(struct seq_file
*seq
)
59 struct ct_iter_state
*st
= seq
->private;
62 st
->bucket
< nf_conntrack_htable_size
;
64 if (!hlist_empty(&nf_conntrack_hash
[st
->bucket
]))
65 return nf_conntrack_hash
[st
->bucket
].first
;
70 static struct hlist_node
*ct_get_next(struct seq_file
*seq
,
71 struct hlist_node
*head
)
73 struct ct_iter_state
*st
= seq
->private;
76 while (head
== NULL
) {
77 if (++st
->bucket
>= nf_conntrack_htable_size
)
79 head
= nf_conntrack_hash
[st
->bucket
].first
;
84 static struct hlist_node
*ct_get_idx(struct seq_file
*seq
, loff_t pos
)
86 struct hlist_node
*head
= ct_get_first(seq
);
89 while (pos
&& (head
= ct_get_next(seq
, head
)))
91 return pos
? NULL
: head
;
94 static void *ct_seq_start(struct seq_file
*seq
, loff_t
*pos
)
96 read_lock_bh(&nf_conntrack_lock
);
97 return ct_get_idx(seq
, *pos
);
100 static void *ct_seq_next(struct seq_file
*s
, void *v
, loff_t
*pos
)
103 return ct_get_next(s
, v
);
106 static void ct_seq_stop(struct seq_file
*s
, void *v
)
108 read_unlock_bh(&nf_conntrack_lock
);
111 /* return 0 on success, 1 in case of error */
112 static int ct_seq_show(struct seq_file
*s
, void *v
)
114 const struct nf_conntrack_tuple_hash
*hash
= v
;
115 const struct nf_conn
*conntrack
= nf_ct_tuplehash_to_ctrack(hash
);
116 struct nf_conntrack_l3proto
*l3proto
;
117 struct nf_conntrack_l4proto
*l4proto
;
119 NF_CT_ASSERT(conntrack
);
121 /* we only want to print DIR_ORIGINAL */
122 if (NF_CT_DIRECTION(hash
))
125 l3proto
= __nf_ct_l3proto_find(conntrack
->tuplehash
[IP_CT_DIR_ORIGINAL
]
128 NF_CT_ASSERT(l3proto
);
129 l4proto
= __nf_ct_l4proto_find(conntrack
->tuplehash
[IP_CT_DIR_ORIGINAL
]
131 conntrack
->tuplehash
[IP_CT_DIR_ORIGINAL
]
132 .tuple
.dst
.protonum
);
133 NF_CT_ASSERT(l4proto
);
135 if (seq_printf(s
, "%-8s %u %-8s %u %ld ",
137 conntrack
->tuplehash
[IP_CT_DIR_ORIGINAL
].tuple
.src
.l3num
,
139 conntrack
->tuplehash
[IP_CT_DIR_ORIGINAL
].tuple
.dst
.protonum
,
140 timer_pending(&conntrack
->timeout
)
141 ? (long)(conntrack
->timeout
.expires
- jiffies
)/HZ
: 0) != 0)
144 if (l3proto
->print_conntrack(s
, conntrack
))
147 if (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 struct seq_file
*seq
;
198 struct ct_iter_state
*st
;
201 st
= kmalloc(sizeof(struct ct_iter_state
), GFP_KERNEL
);
204 ret
= seq_open(file
, &ct_seq_ops
);
207 seq
= file
->private_data
;
209 memset(st
, 0, sizeof(struct ct_iter_state
));
216 static const struct file_operations ct_file_ops
= {
217 .owner
= THIS_MODULE
,
221 .release
= seq_release_private
,
224 static void *ct_cpu_seq_start(struct seq_file
*seq
, loff_t
*pos
)
229 return SEQ_START_TOKEN
;
231 for (cpu
= *pos
-1; cpu
< NR_CPUS
; ++cpu
) {
232 if (!cpu_possible(cpu
))
235 return &per_cpu(nf_conntrack_stat
, cpu
);
241 static void *ct_cpu_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
245 for (cpu
= *pos
; cpu
< NR_CPUS
; ++cpu
) {
246 if (!cpu_possible(cpu
))
249 return &per_cpu(nf_conntrack_stat
, cpu
);
255 static void ct_cpu_seq_stop(struct seq_file
*seq
, void *v
)
259 static int ct_cpu_seq_show(struct seq_file
*seq
, void *v
)
261 unsigned int nr_conntracks
= atomic_read(&nf_conntrack_count
);
262 struct ip_conntrack_stat
*st
= v
;
264 if (v
== SEQ_START_TOKEN
) {
265 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");
269 seq_printf(seq
, "%08x %08x %08x %08x %08x %08x %08x %08x "
270 "%08x %08x %08x %08x %08x %08x %08x %08x \n",
292 static const struct seq_operations ct_cpu_seq_ops
= {
293 .start
= ct_cpu_seq_start
,
294 .next
= ct_cpu_seq_next
,
295 .stop
= ct_cpu_seq_stop
,
296 .show
= ct_cpu_seq_show
,
299 static int ct_cpu_seq_open(struct inode
*inode
, struct file
*file
)
301 return seq_open(file
, &ct_cpu_seq_ops
);
304 static const struct file_operations ct_cpu_seq_fops
= {
305 .owner
= THIS_MODULE
,
306 .open
= ct_cpu_seq_open
,
309 .release
= seq_release_private
,
311 #endif /* CONFIG_PROC_FS */
315 int nf_conntrack_checksum __read_mostly
= 1;
316 EXPORT_SYMBOL_GPL(nf_conntrack_checksum
);
319 /* Log invalid packets of a given protocol */
320 static int log_invalid_proto_min
= 0;
321 static int log_invalid_proto_max
= 255;
323 static struct ctl_table_header
*nf_ct_sysctl_header
;
325 static ctl_table nf_ct_sysctl_table
[] = {
327 .ctl_name
= NET_NF_CONNTRACK_MAX
,
328 .procname
= "nf_conntrack_max",
329 .data
= &nf_conntrack_max
,
330 .maxlen
= sizeof(int),
332 .proc_handler
= &proc_dointvec
,
335 .ctl_name
= NET_NF_CONNTRACK_COUNT
,
336 .procname
= "nf_conntrack_count",
337 .data
= &nf_conntrack_count
,
338 .maxlen
= sizeof(int),
340 .proc_handler
= &proc_dointvec
,
343 .ctl_name
= NET_NF_CONNTRACK_BUCKETS
,
344 .procname
= "nf_conntrack_buckets",
345 .data
= &nf_conntrack_htable_size
,
346 .maxlen
= sizeof(unsigned int),
348 .proc_handler
= &proc_dointvec
,
351 .ctl_name
= NET_NF_CONNTRACK_CHECKSUM
,
352 .procname
= "nf_conntrack_checksum",
353 .data
= &nf_conntrack_checksum
,
354 .maxlen
= sizeof(unsigned int),
356 .proc_handler
= &proc_dointvec
,
359 .ctl_name
= NET_NF_CONNTRACK_LOG_INVALID
,
360 .procname
= "nf_conntrack_log_invalid",
361 .data
= &nf_ct_log_invalid
,
362 .maxlen
= sizeof(unsigned int),
364 .proc_handler
= &proc_dointvec_minmax
,
365 .strategy
= &sysctl_intvec
,
366 .extra1
= &log_invalid_proto_min
,
367 .extra2
= &log_invalid_proto_max
,
370 .ctl_name
= CTL_UNNUMBERED
,
371 .procname
= "nf_conntrack_expect_max",
372 .data
= &nf_ct_expect_max
,
373 .maxlen
= sizeof(int),
375 .proc_handler
= &proc_dointvec
,
380 #define NET_NF_CONNTRACK_MAX 2089
382 static ctl_table nf_ct_netfilter_table
[] = {
384 .ctl_name
= NET_NETFILTER
,
385 .procname
= "netfilter",
387 .child
= nf_ct_sysctl_table
,
390 .ctl_name
= NET_NF_CONNTRACK_MAX
,
391 .procname
= "nf_conntrack_max",
392 .data
= &nf_conntrack_max
,
393 .maxlen
= sizeof(int),
395 .proc_handler
= &proc_dointvec
,
400 static ctl_table nf_ct_net_table
[] = {
405 .child
= nf_ct_netfilter_table
,
409 EXPORT_SYMBOL_GPL(nf_ct_log_invalid
);
410 #endif /* CONFIG_SYSCTL */
412 static int __init
nf_conntrack_standalone_init(void)
414 #ifdef CONFIG_PROC_FS
415 struct proc_dir_entry
*proc
, *proc_stat
;
419 ret
= nf_conntrack_init();
423 #ifdef CONFIG_PROC_FS
424 proc
= proc_net_fops_create("nf_conntrack", 0440, &ct_file_ops
);
425 if (!proc
) goto cleanup_init
;
427 proc_stat
= create_proc_entry("nf_conntrack", S_IRUGO
, proc_net_stat
);
431 proc_stat
->proc_fops
= &ct_cpu_seq_fops
;
432 proc_stat
->owner
= THIS_MODULE
;
435 nf_ct_sysctl_header
= register_sysctl_table(nf_ct_net_table
);
436 if (nf_ct_sysctl_header
== NULL
) {
437 printk("nf_conntrack: can't register to sysctl.\n");
439 goto cleanup_proc_stat
;
447 #ifdef CONFIG_PROC_FS
448 remove_proc_entry("nf_conntrack", proc_net_stat
);
450 proc_net_remove("nf_conntrack");
452 #endif /* CNFIG_PROC_FS */
453 nf_conntrack_cleanup();
457 static void __exit
nf_conntrack_standalone_fini(void)
460 unregister_sysctl_table(nf_ct_sysctl_header
);
462 #ifdef CONFIG_PROC_FS
463 remove_proc_entry("nf_conntrack", proc_net_stat
);
464 proc_net_remove("nf_conntrack");
465 #endif /* CNFIG_PROC_FS */
466 nf_conntrack_cleanup();
469 module_init(nf_conntrack_standalone_init
);
470 module_exit(nf_conntrack_standalone_fini
);
472 /* Some modules need us, but don't depend directly on any symbol.
473 They should call this. */
474 void need_conntrack(void)
477 EXPORT_SYMBOL_GPL(need_conntrack
);