1 /* This file contains all the functions required for the standalone
4 These are not required by the compatibility layer.
7 /* (C) 1999-2001 Paul `Rusty' Russell
8 * (C) 2002-2005 Netfilter Core Team <coreteam@netfilter.org>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
15 #include <linux/config.h>
16 #include <linux/types.h>
18 #include <linux/netfilter.h>
19 #include <linux/netfilter_ipv4.h>
20 #include <linux/module.h>
21 #include <linux/skbuff.h>
22 #include <linux/proc_fs.h>
23 #include <linux/seq_file.h>
24 #include <linux/percpu.h>
26 #include <linux/sysctl.h>
28 #include <net/checksum.h>
30 #include <net/route.h>
32 #define ASSERT_READ_LOCK(x)
33 #define ASSERT_WRITE_LOCK(x)
35 #include <linux/netfilter_ipv4/ip_conntrack.h>
36 #include <linux/netfilter_ipv4/ip_conntrack_protocol.h>
37 #include <linux/netfilter_ipv4/ip_conntrack_core.h>
38 #include <linux/netfilter_ipv4/ip_conntrack_helper.h>
39 #include <linux/netfilter_ipv4/listhelp.h>
44 #define DEBUGP(format, args...)
47 MODULE_LICENSE("GPL");
49 extern atomic_t ip_conntrack_count
;
50 DECLARE_PER_CPU(struct ip_conntrack_stat
, ip_conntrack_stat
);
52 static int kill_proto(struct ip_conntrack
*i
, void *data
)
54 return (i
->tuplehash
[IP_CT_DIR_ORIGINAL
].tuple
.dst
.protonum
==
55 *((u_int8_t
*) data
));
60 print_tuple(struct seq_file
*s
, const struct ip_conntrack_tuple
*tuple
,
61 struct ip_conntrack_protocol
*proto
)
63 seq_printf(s
, "src=%u.%u.%u.%u dst=%u.%u.%u.%u ",
64 NIPQUAD(tuple
->src
.ip
), NIPQUAD(tuple
->dst
.ip
));
65 return proto
->print_tuple(s
, tuple
);
68 #ifdef CONFIG_IP_NF_CT_ACCT
70 seq_print_counters(struct seq_file
*s
,
71 const struct ip_conntrack_counter
*counter
)
73 return seq_printf(s
, "packets=%llu bytes=%llu ",
74 (unsigned long long)counter
->packets
,
75 (unsigned long long)counter
->bytes
);
78 #define seq_print_counters(x, y) 0
81 struct ct_iter_state
{
85 static struct list_head
*ct_get_first(struct seq_file
*seq
)
87 struct ct_iter_state
*st
= seq
->private;
90 st
->bucket
< ip_conntrack_htable_size
;
92 if (!list_empty(&ip_conntrack_hash
[st
->bucket
]))
93 return ip_conntrack_hash
[st
->bucket
].next
;
98 static struct list_head
*ct_get_next(struct seq_file
*seq
, struct list_head
*head
)
100 struct ct_iter_state
*st
= seq
->private;
103 while (head
== &ip_conntrack_hash
[st
->bucket
]) {
104 if (++st
->bucket
>= ip_conntrack_htable_size
)
106 head
= ip_conntrack_hash
[st
->bucket
].next
;
111 static struct list_head
*ct_get_idx(struct seq_file
*seq
, loff_t pos
)
113 struct list_head
*head
= ct_get_first(seq
);
116 while (pos
&& (head
= ct_get_next(seq
, head
)))
118 return pos
? NULL
: head
;
121 static void *ct_seq_start(struct seq_file
*seq
, loff_t
*pos
)
123 read_lock_bh(&ip_conntrack_lock
);
124 return ct_get_idx(seq
, *pos
);
127 static void *ct_seq_next(struct seq_file
*s
, void *v
, loff_t
*pos
)
130 return ct_get_next(s
, v
);
133 static void ct_seq_stop(struct seq_file
*s
, void *v
)
135 read_unlock_bh(&ip_conntrack_lock
);
138 static int ct_seq_show(struct seq_file
*s
, void *v
)
140 const struct ip_conntrack_tuple_hash
*hash
= v
;
141 const struct ip_conntrack
*conntrack
= tuplehash_to_ctrack(hash
);
142 struct ip_conntrack_protocol
*proto
;
144 ASSERT_READ_LOCK(&ip_conntrack_lock
);
145 IP_NF_ASSERT(conntrack
);
147 /* we only want to print DIR_ORIGINAL */
151 proto
= __ip_conntrack_proto_find(conntrack
->tuplehash
[IP_CT_DIR_ORIGINAL
].tuple
.dst
.protonum
);
154 if (seq_printf(s
, "%-8s %u %ld ",
156 conntrack
->tuplehash
[IP_CT_DIR_ORIGINAL
].tuple
.dst
.protonum
,
157 timer_pending(&conntrack
->timeout
)
158 ? (long)(conntrack
->timeout
.expires
- jiffies
)/HZ
162 if (proto
->print_conntrack(s
, conntrack
))
165 if (print_tuple(s
, &conntrack
->tuplehash
[IP_CT_DIR_ORIGINAL
].tuple
,
169 if (seq_print_counters(s
, &conntrack
->counters
[IP_CT_DIR_ORIGINAL
]))
172 if (!(test_bit(IPS_SEEN_REPLY_BIT
, &conntrack
->status
)))
173 if (seq_printf(s
, "[UNREPLIED] "))
176 if (print_tuple(s
, &conntrack
->tuplehash
[IP_CT_DIR_REPLY
].tuple
,
180 if (seq_print_counters(s
, &conntrack
->counters
[IP_CT_DIR_REPLY
]))
183 if (test_bit(IPS_ASSURED_BIT
, &conntrack
->status
))
184 if (seq_printf(s
, "[ASSURED] "))
187 #if defined(CONFIG_IP_NF_CONNTRACK_MARK)
188 if (seq_printf(s
, "mark=%u ", conntrack
->mark
))
192 if (seq_printf(s
, "use=%u\n", atomic_read(&conntrack
->ct_general
.use
)))
198 static struct seq_operations ct_seq_ops
= {
199 .start
= ct_seq_start
,
205 static int ct_open(struct inode
*inode
, struct file
*file
)
207 struct seq_file
*seq
;
208 struct ct_iter_state
*st
;
211 st
= kmalloc(sizeof(struct ct_iter_state
), GFP_KERNEL
);
214 ret
= seq_open(file
, &ct_seq_ops
);
217 seq
= file
->private_data
;
219 memset(st
, 0, sizeof(struct ct_iter_state
));
226 static struct file_operations ct_file_ops
= {
227 .owner
= THIS_MODULE
,
231 .release
= seq_release_private
,
235 static void *exp_seq_start(struct seq_file
*s
, loff_t
*pos
)
237 struct list_head
*e
= &ip_conntrack_expect_list
;
240 /* strange seq_file api calls stop even if we fail,
241 * thus we need to grab lock since stop unlocks */
242 read_lock_bh(&ip_conntrack_lock
);
247 for (i
= 0; i
<= *pos
; i
++) {
249 if (e
== &ip_conntrack_expect_list
)
255 static void *exp_seq_next(struct seq_file
*s
, void *v
, loff_t
*pos
)
257 struct list_head
*e
= v
;
262 if (e
== &ip_conntrack_expect_list
)
268 static void exp_seq_stop(struct seq_file
*s
, void *v
)
270 read_unlock_bh(&ip_conntrack_lock
);
273 static int exp_seq_show(struct seq_file
*s
, void *v
)
275 struct ip_conntrack_expect
*expect
= v
;
277 if (expect
->timeout
.function
)
278 seq_printf(s
, "%ld ", timer_pending(&expect
->timeout
)
279 ? (long)(expect
->timeout
.expires
- jiffies
)/HZ
: 0);
283 seq_printf(s
, "proto=%u ", expect
->tuple
.dst
.protonum
);
285 print_tuple(s
, &expect
->tuple
,
286 __ip_conntrack_proto_find(expect
->tuple
.dst
.protonum
));
287 return seq_putc(s
, '\n');
290 static struct seq_operations exp_seq_ops
= {
291 .start
= exp_seq_start
,
292 .next
= exp_seq_next
,
293 .stop
= exp_seq_stop
,
297 static int exp_open(struct inode
*inode
, struct file
*file
)
299 return seq_open(file
, &exp_seq_ops
);
302 static struct file_operations exp_file_ops
= {
303 .owner
= THIS_MODULE
,
307 .release
= seq_release
310 static void *ct_cpu_seq_start(struct seq_file
*seq
, loff_t
*pos
)
315 return SEQ_START_TOKEN
;
317 for (cpu
= *pos
-1; cpu
< NR_CPUS
; ++cpu
) {
318 if (!cpu_possible(cpu
))
321 return &per_cpu(ip_conntrack_stat
, cpu
);
327 static void *ct_cpu_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
331 for (cpu
= *pos
; cpu
< NR_CPUS
; ++cpu
) {
332 if (!cpu_possible(cpu
))
335 return &per_cpu(ip_conntrack_stat
, cpu
);
341 static void ct_cpu_seq_stop(struct seq_file
*seq
, void *v
)
345 static int ct_cpu_seq_show(struct seq_file
*seq
, void *v
)
347 unsigned int nr_conntracks
= atomic_read(&ip_conntrack_count
);
348 struct ip_conntrack_stat
*st
= v
;
350 if (v
== SEQ_START_TOKEN
) {
351 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");
355 seq_printf(seq
, "%08x %08x %08x %08x %08x %08x %08x %08x "
356 "%08x %08x %08x %08x %08x %08x %08x %08x \n",
378 static struct seq_operations ct_cpu_seq_ops
= {
379 .start
= ct_cpu_seq_start
,
380 .next
= ct_cpu_seq_next
,
381 .stop
= ct_cpu_seq_stop
,
382 .show
= ct_cpu_seq_show
,
385 static int ct_cpu_seq_open(struct inode
*inode
, struct file
*file
)
387 return seq_open(file
, &ct_cpu_seq_ops
);
390 static struct file_operations ct_cpu_seq_fops
= {
391 .owner
= THIS_MODULE
,
392 .open
= ct_cpu_seq_open
,
395 .release
= seq_release_private
,
399 static unsigned int ip_confirm(unsigned int hooknum
,
400 struct sk_buff
**pskb
,
401 const struct net_device
*in
,
402 const struct net_device
*out
,
403 int (*okfn
)(struct sk_buff
*))
405 /* We've seen it coming out the other side: confirm it */
406 return ip_conntrack_confirm(pskb
);
409 static unsigned int ip_conntrack_help(unsigned int hooknum
,
410 struct sk_buff
**pskb
,
411 const struct net_device
*in
,
412 const struct net_device
*out
,
413 int (*okfn
)(struct sk_buff
*))
415 struct ip_conntrack
*ct
;
416 enum ip_conntrack_info ctinfo
;
418 /* This is where we call the helper: as the packet goes out. */
419 ct
= ip_conntrack_get(*pskb
, &ctinfo
);
420 if (ct
&& ct
->helper
) {
422 ret
= ct
->helper
->help(pskb
, ct
, ctinfo
);
423 if (ret
!= NF_ACCEPT
)
429 static unsigned int ip_conntrack_defrag(unsigned int hooknum
,
430 struct sk_buff
**pskb
,
431 const struct net_device
*in
,
432 const struct net_device
*out
,
433 int (*okfn
)(struct sk_buff
*))
435 #if !defined(CONFIG_IP_NF_NAT) && !defined(CONFIG_IP_NF_NAT_MODULE)
436 /* Previously seen (loopback)? Ignore. Do this before
442 /* Gather fragments. */
443 if ((*pskb
)->nh
.iph
->frag_off
& htons(IP_MF
|IP_OFFSET
)) {
444 *pskb
= ip_ct_gather_frags(*pskb
,
445 hooknum
== NF_IP_PRE_ROUTING
?
446 IP_DEFRAG_CONNTRACK_IN
:
447 IP_DEFRAG_CONNTRACK_OUT
);
454 static unsigned int ip_conntrack_local(unsigned int hooknum
,
455 struct sk_buff
**pskb
,
456 const struct net_device
*in
,
457 const struct net_device
*out
,
458 int (*okfn
)(struct sk_buff
*))
460 /* root is playing with raw sockets. */
461 if ((*pskb
)->len
< sizeof(struct iphdr
)
462 || (*pskb
)->nh
.iph
->ihl
* 4 < sizeof(struct iphdr
)) {
464 printk("ipt_hook: happy cracking.\n");
467 return ip_conntrack_in(hooknum
, pskb
, in
, out
, okfn
);
470 /* Connection tracking may drop packets, but never alters them, so
471 make it the first hook. */
472 static struct nf_hook_ops ip_conntrack_ops
[] = {
474 .hook
= ip_conntrack_defrag
,
475 .owner
= THIS_MODULE
,
477 .hooknum
= NF_IP_PRE_ROUTING
,
478 .priority
= NF_IP_PRI_CONNTRACK_DEFRAG
,
481 .hook
= ip_conntrack_in
,
482 .owner
= THIS_MODULE
,
484 .hooknum
= NF_IP_PRE_ROUTING
,
485 .priority
= NF_IP_PRI_CONNTRACK
,
488 .hook
= ip_conntrack_defrag
,
489 .owner
= THIS_MODULE
,
491 .hooknum
= NF_IP_LOCAL_OUT
,
492 .priority
= NF_IP_PRI_CONNTRACK_DEFRAG
,
495 .hook
= ip_conntrack_local
,
496 .owner
= THIS_MODULE
,
498 .hooknum
= NF_IP_LOCAL_OUT
,
499 .priority
= NF_IP_PRI_CONNTRACK
,
502 .hook
= ip_conntrack_help
,
503 .owner
= THIS_MODULE
,
505 .hooknum
= NF_IP_POST_ROUTING
,
506 .priority
= NF_IP_PRI_CONNTRACK_HELPER
,
509 .hook
= ip_conntrack_help
,
510 .owner
= THIS_MODULE
,
512 .hooknum
= NF_IP_LOCAL_IN
,
513 .priority
= NF_IP_PRI_CONNTRACK_HELPER
,
517 .owner
= THIS_MODULE
,
519 .hooknum
= NF_IP_POST_ROUTING
,
520 .priority
= NF_IP_PRI_CONNTRACK_CONFIRM
,
524 .owner
= THIS_MODULE
,
526 .hooknum
= NF_IP_LOCAL_IN
,
527 .priority
= NF_IP_PRI_CONNTRACK_CONFIRM
,
535 /* From ip_conntrack_core.c */
536 extern int ip_conntrack_max
;
537 extern unsigned int ip_conntrack_htable_size
;
539 /* From ip_conntrack_proto_tcp.c */
540 extern unsigned int ip_ct_tcp_timeout_syn_sent
;
541 extern unsigned int ip_ct_tcp_timeout_syn_recv
;
542 extern unsigned int ip_ct_tcp_timeout_established
;
543 extern unsigned int ip_ct_tcp_timeout_fin_wait
;
544 extern unsigned int ip_ct_tcp_timeout_close_wait
;
545 extern unsigned int ip_ct_tcp_timeout_last_ack
;
546 extern unsigned int ip_ct_tcp_timeout_time_wait
;
547 extern unsigned int ip_ct_tcp_timeout_close
;
548 extern unsigned int ip_ct_tcp_timeout_max_retrans
;
549 extern int ip_ct_tcp_loose
;
550 extern int ip_ct_tcp_be_liberal
;
551 extern int ip_ct_tcp_max_retrans
;
553 /* From ip_conntrack_proto_udp.c */
554 extern unsigned int ip_ct_udp_timeout
;
555 extern unsigned int ip_ct_udp_timeout_stream
;
557 /* From ip_conntrack_proto_icmp.c */
558 extern unsigned int ip_ct_icmp_timeout
;
560 /* From ip_conntrack_proto_icmp.c */
561 extern unsigned int ip_ct_generic_timeout
;
563 /* Log invalid packets of a given protocol */
564 static int log_invalid_proto_min
= 0;
565 static int log_invalid_proto_max
= 255;
567 static struct ctl_table_header
*ip_ct_sysctl_header
;
569 static ctl_table ip_ct_sysctl_table
[] = {
571 .ctl_name
= NET_IPV4_NF_CONNTRACK_MAX
,
572 .procname
= "ip_conntrack_max",
573 .data
= &ip_conntrack_max
,
574 .maxlen
= sizeof(int),
576 .proc_handler
= &proc_dointvec
,
579 .ctl_name
= NET_IPV4_NF_CONNTRACK_COUNT
,
580 .procname
= "ip_conntrack_count",
581 .data
= &ip_conntrack_count
,
582 .maxlen
= sizeof(int),
584 .proc_handler
= &proc_dointvec
,
587 .ctl_name
= NET_IPV4_NF_CONNTRACK_BUCKETS
,
588 .procname
= "ip_conntrack_buckets",
589 .data
= &ip_conntrack_htable_size
,
590 .maxlen
= sizeof(unsigned int),
592 .proc_handler
= &proc_dointvec
,
595 .ctl_name
= NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_SYN_SENT
,
596 .procname
= "ip_conntrack_tcp_timeout_syn_sent",
597 .data
= &ip_ct_tcp_timeout_syn_sent
,
598 .maxlen
= sizeof(unsigned int),
600 .proc_handler
= &proc_dointvec_jiffies
,
603 .ctl_name
= NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_SYN_RECV
,
604 .procname
= "ip_conntrack_tcp_timeout_syn_recv",
605 .data
= &ip_ct_tcp_timeout_syn_recv
,
606 .maxlen
= sizeof(unsigned int),
608 .proc_handler
= &proc_dointvec_jiffies
,
611 .ctl_name
= NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_ESTABLISHED
,
612 .procname
= "ip_conntrack_tcp_timeout_established",
613 .data
= &ip_ct_tcp_timeout_established
,
614 .maxlen
= sizeof(unsigned int),
616 .proc_handler
= &proc_dointvec_jiffies
,
619 .ctl_name
= NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_FIN_WAIT
,
620 .procname
= "ip_conntrack_tcp_timeout_fin_wait",
621 .data
= &ip_ct_tcp_timeout_fin_wait
,
622 .maxlen
= sizeof(unsigned int),
624 .proc_handler
= &proc_dointvec_jiffies
,
627 .ctl_name
= NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_CLOSE_WAIT
,
628 .procname
= "ip_conntrack_tcp_timeout_close_wait",
629 .data
= &ip_ct_tcp_timeout_close_wait
,
630 .maxlen
= sizeof(unsigned int),
632 .proc_handler
= &proc_dointvec_jiffies
,
635 .ctl_name
= NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_LAST_ACK
,
636 .procname
= "ip_conntrack_tcp_timeout_last_ack",
637 .data
= &ip_ct_tcp_timeout_last_ack
,
638 .maxlen
= sizeof(unsigned int),
640 .proc_handler
= &proc_dointvec_jiffies
,
643 .ctl_name
= NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_TIME_WAIT
,
644 .procname
= "ip_conntrack_tcp_timeout_time_wait",
645 .data
= &ip_ct_tcp_timeout_time_wait
,
646 .maxlen
= sizeof(unsigned int),
648 .proc_handler
= &proc_dointvec_jiffies
,
651 .ctl_name
= NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_CLOSE
,
652 .procname
= "ip_conntrack_tcp_timeout_close",
653 .data
= &ip_ct_tcp_timeout_close
,
654 .maxlen
= sizeof(unsigned int),
656 .proc_handler
= &proc_dointvec_jiffies
,
659 .ctl_name
= NET_IPV4_NF_CONNTRACK_UDP_TIMEOUT
,
660 .procname
= "ip_conntrack_udp_timeout",
661 .data
= &ip_ct_udp_timeout
,
662 .maxlen
= sizeof(unsigned int),
664 .proc_handler
= &proc_dointvec_jiffies
,
667 .ctl_name
= NET_IPV4_NF_CONNTRACK_UDP_TIMEOUT_STREAM
,
668 .procname
= "ip_conntrack_udp_timeout_stream",
669 .data
= &ip_ct_udp_timeout_stream
,
670 .maxlen
= sizeof(unsigned int),
672 .proc_handler
= &proc_dointvec_jiffies
,
675 .ctl_name
= NET_IPV4_NF_CONNTRACK_ICMP_TIMEOUT
,
676 .procname
= "ip_conntrack_icmp_timeout",
677 .data
= &ip_ct_icmp_timeout
,
678 .maxlen
= sizeof(unsigned int),
680 .proc_handler
= &proc_dointvec_jiffies
,
683 .ctl_name
= NET_IPV4_NF_CONNTRACK_GENERIC_TIMEOUT
,
684 .procname
= "ip_conntrack_generic_timeout",
685 .data
= &ip_ct_generic_timeout
,
686 .maxlen
= sizeof(unsigned int),
688 .proc_handler
= &proc_dointvec_jiffies
,
691 .ctl_name
= NET_IPV4_NF_CONNTRACK_LOG_INVALID
,
692 .procname
= "ip_conntrack_log_invalid",
693 .data
= &ip_ct_log_invalid
,
694 .maxlen
= sizeof(unsigned int),
696 .proc_handler
= &proc_dointvec_minmax
,
697 .strategy
= &sysctl_intvec
,
698 .extra1
= &log_invalid_proto_min
,
699 .extra2
= &log_invalid_proto_max
,
702 .ctl_name
= NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_MAX_RETRANS
,
703 .procname
= "ip_conntrack_tcp_timeout_max_retrans",
704 .data
= &ip_ct_tcp_timeout_max_retrans
,
705 .maxlen
= sizeof(unsigned int),
707 .proc_handler
= &proc_dointvec_jiffies
,
710 .ctl_name
= NET_IPV4_NF_CONNTRACK_TCP_LOOSE
,
711 .procname
= "ip_conntrack_tcp_loose",
712 .data
= &ip_ct_tcp_loose
,
713 .maxlen
= sizeof(unsigned int),
715 .proc_handler
= &proc_dointvec
,
718 .ctl_name
= NET_IPV4_NF_CONNTRACK_TCP_BE_LIBERAL
,
719 .procname
= "ip_conntrack_tcp_be_liberal",
720 .data
= &ip_ct_tcp_be_liberal
,
721 .maxlen
= sizeof(unsigned int),
723 .proc_handler
= &proc_dointvec
,
726 .ctl_name
= NET_IPV4_NF_CONNTRACK_TCP_MAX_RETRANS
,
727 .procname
= "ip_conntrack_tcp_max_retrans",
728 .data
= &ip_ct_tcp_max_retrans
,
729 .maxlen
= sizeof(unsigned int),
731 .proc_handler
= &proc_dointvec
,
736 #define NET_IP_CONNTRACK_MAX 2089
738 static ctl_table ip_ct_netfilter_table
[] = {
740 .ctl_name
= NET_IPV4_NETFILTER
,
741 .procname
= "netfilter",
743 .child
= ip_ct_sysctl_table
,
746 .ctl_name
= NET_IP_CONNTRACK_MAX
,
747 .procname
= "ip_conntrack_max",
748 .data
= &ip_conntrack_max
,
749 .maxlen
= sizeof(int),
751 .proc_handler
= &proc_dointvec
756 static ctl_table ip_ct_ipv4_table
[] = {
758 .ctl_name
= NET_IPV4
,
761 .child
= ip_ct_netfilter_table
,
766 static ctl_table ip_ct_net_table
[] = {
771 .child
= ip_ct_ipv4_table
,
776 EXPORT_SYMBOL(ip_ct_log_invalid
);
777 #endif /* CONFIG_SYSCTL */
779 /* FIXME: Allow NULL functions and sub in pointers to generic for
781 int ip_conntrack_protocol_register(struct ip_conntrack_protocol
*proto
)
785 write_lock_bh(&ip_conntrack_lock
);
786 if (ip_ct_protos
[proto
->proto
] != &ip_conntrack_generic_protocol
) {
790 ip_ct_protos
[proto
->proto
] = proto
;
792 write_unlock_bh(&ip_conntrack_lock
);
796 void ip_conntrack_protocol_unregister(struct ip_conntrack_protocol
*proto
)
798 write_lock_bh(&ip_conntrack_lock
);
799 ip_ct_protos
[proto
->proto
] = &ip_conntrack_generic_protocol
;
800 write_unlock_bh(&ip_conntrack_lock
);
802 /* Somebody could be still looking at the proto in bh. */
805 /* Remove all contrack entries for this protocol */
806 ip_ct_iterate_cleanup(kill_proto
, &proto
->proto
);
809 static int __init
ip_conntrack_standalone_init(void)
811 #ifdef CONFIG_PROC_FS
812 struct proc_dir_entry
*proc
, *proc_exp
, *proc_stat
;
816 ret
= ip_conntrack_init();
820 #ifdef CONFIG_PROC_FS
822 proc
= proc_net_fops_create("ip_conntrack", 0440, &ct_file_ops
);
823 if (!proc
) goto cleanup_init
;
825 proc_exp
= proc_net_fops_create("ip_conntrack_expect", 0440,
827 if (!proc_exp
) goto cleanup_proc
;
829 proc_stat
= create_proc_entry("ip_conntrack", S_IRUGO
, proc_net_stat
);
831 goto cleanup_proc_exp
;
833 proc_stat
->proc_fops
= &ct_cpu_seq_fops
;
834 proc_stat
->owner
= THIS_MODULE
;
837 ret
= nf_register_hooks(ip_conntrack_ops
, ARRAY_SIZE(ip_conntrack_ops
));
839 printk("ip_conntrack: can't register hooks.\n");
840 goto cleanup_proc_stat
;
843 ip_ct_sysctl_header
= register_sysctl_table(ip_ct_net_table
, 0);
844 if (ip_ct_sysctl_header
== NULL
) {
845 printk("ip_conntrack: can't register to sysctl.\n");
854 nf_unregister_hooks(ip_conntrack_ops
, ARRAY_SIZE(ip_conntrack_ops
));
857 #ifdef CONFIG_PROC_FS
858 remove_proc_entry("ip_conntrack", proc_net_stat
);
860 proc_net_remove("ip_conntrack_expect");
862 proc_net_remove("ip_conntrack");
864 #endif /* CONFIG_PROC_FS */
865 ip_conntrack_cleanup();
869 static void __exit
ip_conntrack_standalone_fini(void)
873 unregister_sysctl_table(ip_ct_sysctl_header
);
875 nf_unregister_hooks(ip_conntrack_ops
, ARRAY_SIZE(ip_conntrack_ops
));
876 #ifdef CONFIG_PROC_FS
877 remove_proc_entry("ip_conntrack", proc_net_stat
);
878 proc_net_remove("ip_conntrack_expect");
879 proc_net_remove("ip_conntrack");
880 #endif /* CONFIG_PROC_FS */
881 ip_conntrack_cleanup();
884 module_init(ip_conntrack_standalone_init
);
885 module_exit(ip_conntrack_standalone_fini
);
887 /* Some modules need us, but don't depend directly on any symbol.
888 They should call this. */
889 void need_conntrack(void)
893 #ifdef CONFIG_IP_NF_CONNTRACK_EVENTS
894 EXPORT_SYMBOL_GPL(ip_conntrack_chain
);
895 EXPORT_SYMBOL_GPL(ip_conntrack_expect_chain
);
896 EXPORT_SYMBOL_GPL(ip_conntrack_register_notifier
);
897 EXPORT_SYMBOL_GPL(ip_conntrack_unregister_notifier
);
898 EXPORT_SYMBOL_GPL(__ip_ct_event_cache_init
);
899 EXPORT_PER_CPU_SYMBOL_GPL(ip_conntrack_ecache
);
901 EXPORT_SYMBOL(ip_conntrack_protocol_register
);
902 EXPORT_SYMBOL(ip_conntrack_protocol_unregister
);
903 EXPORT_SYMBOL(ip_ct_get_tuple
);
904 EXPORT_SYMBOL(invert_tuplepr
);
905 EXPORT_SYMBOL(ip_conntrack_alter_reply
);
906 EXPORT_SYMBOL(ip_conntrack_destroyed
);
907 EXPORT_SYMBOL(need_conntrack
);
908 EXPORT_SYMBOL(ip_conntrack_helper_register
);
909 EXPORT_SYMBOL(ip_conntrack_helper_unregister
);
910 EXPORT_SYMBOL(ip_ct_iterate_cleanup
);
911 EXPORT_SYMBOL(__ip_ct_refresh_acct
);
913 EXPORT_SYMBOL(ip_conntrack_expect_alloc
);
914 EXPORT_SYMBOL(ip_conntrack_expect_put
);
915 EXPORT_SYMBOL_GPL(__ip_conntrack_expect_find
);
916 EXPORT_SYMBOL_GPL(ip_conntrack_expect_find
);
917 EXPORT_SYMBOL(ip_conntrack_expect_related
);
918 EXPORT_SYMBOL(ip_conntrack_unexpect_related
);
919 EXPORT_SYMBOL_GPL(ip_conntrack_expect_list
);
920 EXPORT_SYMBOL_GPL(ip_ct_unlink_expect
);
922 EXPORT_SYMBOL(ip_conntrack_tuple_taken
);
923 EXPORT_SYMBOL(ip_ct_gather_frags
);
924 EXPORT_SYMBOL(ip_conntrack_htable_size
);
925 EXPORT_SYMBOL(ip_conntrack_lock
);
926 EXPORT_SYMBOL(ip_conntrack_hash
);
927 EXPORT_SYMBOL(ip_conntrack_untracked
);
928 EXPORT_SYMBOL_GPL(ip_conntrack_find_get
);
929 #ifdef CONFIG_IP_NF_NAT_NEEDED
930 EXPORT_SYMBOL(ip_conntrack_tcp_update
);
933 EXPORT_SYMBOL_GPL(ip_conntrack_flush
);
934 EXPORT_SYMBOL_GPL(__ip_conntrack_find
);
936 EXPORT_SYMBOL_GPL(ip_conntrack_alloc
);
937 EXPORT_SYMBOL_GPL(ip_conntrack_free
);
938 EXPORT_SYMBOL_GPL(ip_conntrack_hash_insert
);
940 EXPORT_SYMBOL_GPL(ip_ct_remove_expectations
);
942 EXPORT_SYMBOL_GPL(ip_conntrack_helper_find_get
);
943 EXPORT_SYMBOL_GPL(ip_conntrack_helper_put
);
944 EXPORT_SYMBOL_GPL(__ip_conntrack_helper_find_byname
);
946 EXPORT_SYMBOL_GPL(ip_conntrack_proto_find_get
);
947 EXPORT_SYMBOL_GPL(ip_conntrack_proto_put
);
948 EXPORT_SYMBOL_GPL(__ip_conntrack_proto_find
);
949 #if defined(CONFIG_IP_NF_CONNTRACK_NETLINK) || \
950 defined(CONFIG_IP_NF_CONNTRACK_NETLINK_MODULE)
951 EXPORT_SYMBOL_GPL(ip_ct_port_tuple_to_nfattr
);
952 EXPORT_SYMBOL_GPL(ip_ct_port_nfattr_to_tuple
);