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_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_stat
= create_proc_entry("nf_conntrack", S_IRUGO
, proc_net_stat
);
430 proc_stat
->proc_fops
= &ct_cpu_seq_fops
;
431 proc_stat
->owner
= THIS_MODULE
;
434 nf_ct_sysctl_header
= register_sysctl_table(nf_ct_net_table
);
435 if (nf_ct_sysctl_header
== NULL
) {
436 printk("nf_conntrack: can't register to sysctl.\n");
438 goto cleanup_proc_stat
;
446 #ifdef CONFIG_PROC_FS
447 remove_proc_entry("nf_conntrack", proc_net_stat
);
449 proc_net_remove("nf_conntrack");
451 #endif /* CNFIG_PROC_FS */
452 nf_conntrack_cleanup();
456 static void __exit
nf_conntrack_standalone_fini(void)
459 unregister_sysctl_table(nf_ct_sysctl_header
);
461 #ifdef CONFIG_PROC_FS
462 remove_proc_entry("nf_conntrack", proc_net_stat
);
463 proc_net_remove("nf_conntrack");
464 #endif /* CNFIG_PROC_FS */
465 nf_conntrack_cleanup();
468 module_init(nf_conntrack_standalone_init
);
469 module_exit(nf_conntrack_standalone_fini
);
471 /* Some modules need us, but don't depend directly on any symbol.
472 They should call this. */
473 void need_conntrack(void)
476 EXPORT_SYMBOL_GPL(need_conntrack
);