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/types.h>
17 #include <linux/netfilter.h>
18 #include <linux/netfilter_ipv4.h>
19 #include <linux/module.h>
20 #include <linux/skbuff.h>
21 #include <linux/proc_fs.h>
22 #include <linux/seq_file.h>
23 #include <linux/percpu.h>
25 #include <linux/sysctl.h>
27 #include <net/checksum.h>
29 #include <net/route.h>
31 #include <linux/netfilter_ipv4/ip_conntrack.h>
32 #include <linux/netfilter_ipv4/ip_conntrack_protocol.h>
33 #include <linux/netfilter_ipv4/ip_conntrack_core.h>
34 #include <linux/netfilter_ipv4/ip_conntrack_helper.h>
39 #define DEBUGP(format, args...)
42 MODULE_LICENSE("GPL");
44 extern atomic_t ip_conntrack_count
;
45 DECLARE_PER_CPU(struct ip_conntrack_stat
, ip_conntrack_stat
);
47 static int kill_proto(struct ip_conntrack
*i
, void *data
)
49 return (i
->tuplehash
[IP_CT_DIR_ORIGINAL
].tuple
.dst
.protonum
==
50 *((u_int8_t
*) data
));
55 print_tuple(struct seq_file
*s
, const struct ip_conntrack_tuple
*tuple
,
56 struct ip_conntrack_protocol
*proto
)
58 seq_printf(s
, "src=%u.%u.%u.%u dst=%u.%u.%u.%u ",
59 NIPQUAD(tuple
->src
.ip
), NIPQUAD(tuple
->dst
.ip
));
60 return proto
->print_tuple(s
, tuple
);
63 #ifdef CONFIG_IP_NF_CT_ACCT
65 seq_print_counters(struct seq_file
*s
,
66 const struct ip_conntrack_counter
*counter
)
68 return seq_printf(s
, "packets=%llu bytes=%llu ",
69 (unsigned long long)counter
->packets
,
70 (unsigned long long)counter
->bytes
);
73 #define seq_print_counters(x, y) 0
76 struct ct_iter_state
{
80 static struct list_head
*ct_get_first(struct seq_file
*seq
)
82 struct ct_iter_state
*st
= seq
->private;
85 st
->bucket
< ip_conntrack_htable_size
;
87 if (!list_empty(&ip_conntrack_hash
[st
->bucket
]))
88 return ip_conntrack_hash
[st
->bucket
].next
;
93 static struct list_head
*ct_get_next(struct seq_file
*seq
, struct list_head
*head
)
95 struct ct_iter_state
*st
= seq
->private;
98 while (head
== &ip_conntrack_hash
[st
->bucket
]) {
99 if (++st
->bucket
>= ip_conntrack_htable_size
)
101 head
= ip_conntrack_hash
[st
->bucket
].next
;
106 static struct list_head
*ct_get_idx(struct seq_file
*seq
, loff_t pos
)
108 struct list_head
*head
= ct_get_first(seq
);
111 while (pos
&& (head
= ct_get_next(seq
, head
)))
113 return pos
? NULL
: head
;
116 static void *ct_seq_start(struct seq_file
*seq
, loff_t
*pos
)
118 read_lock_bh(&ip_conntrack_lock
);
119 return ct_get_idx(seq
, *pos
);
122 static void *ct_seq_next(struct seq_file
*s
, void *v
, loff_t
*pos
)
125 return ct_get_next(s
, v
);
128 static void ct_seq_stop(struct seq_file
*s
, void *v
)
130 read_unlock_bh(&ip_conntrack_lock
);
133 static int ct_seq_show(struct seq_file
*s
, void *v
)
135 const struct ip_conntrack_tuple_hash
*hash
= v
;
136 const struct ip_conntrack
*conntrack
= tuplehash_to_ctrack(hash
);
137 struct ip_conntrack_protocol
*proto
;
139 IP_NF_ASSERT(conntrack
);
141 /* we only want to print DIR_ORIGINAL */
145 proto
= __ip_conntrack_proto_find(conntrack
->tuplehash
[IP_CT_DIR_ORIGINAL
].tuple
.dst
.protonum
);
148 if (seq_printf(s
, "%-8s %u %ld ",
150 conntrack
->tuplehash
[IP_CT_DIR_ORIGINAL
].tuple
.dst
.protonum
,
151 timer_pending(&conntrack
->timeout
)
152 ? (long)(conntrack
->timeout
.expires
- jiffies
)/HZ
156 if (proto
->print_conntrack(s
, conntrack
))
159 if (print_tuple(s
, &conntrack
->tuplehash
[IP_CT_DIR_ORIGINAL
].tuple
,
163 if (seq_print_counters(s
, &conntrack
->counters
[IP_CT_DIR_ORIGINAL
]))
166 if (!(test_bit(IPS_SEEN_REPLY_BIT
, &conntrack
->status
)))
167 if (seq_printf(s
, "[UNREPLIED] "))
170 if (print_tuple(s
, &conntrack
->tuplehash
[IP_CT_DIR_REPLY
].tuple
,
174 if (seq_print_counters(s
, &conntrack
->counters
[IP_CT_DIR_REPLY
]))
177 if (test_bit(IPS_ASSURED_BIT
, &conntrack
->status
))
178 if (seq_printf(s
, "[ASSURED] "))
181 #if defined(CONFIG_IP_NF_CONNTRACK_MARK)
182 if (seq_printf(s
, "mark=%u ", conntrack
->mark
))
186 #ifdef CONFIG_IP_NF_CONNTRACK_SECMARK
187 if (seq_printf(s
, "secmark=%u ", conntrack
->secmark
))
191 if (seq_printf(s
, "use=%u\n", atomic_read(&conntrack
->ct_general
.use
)))
197 static struct seq_operations ct_seq_ops
= {
198 .start
= ct_seq_start
,
204 static int ct_open(struct inode
*inode
, struct file
*file
)
206 struct seq_file
*seq
;
207 struct ct_iter_state
*st
;
210 st
= kmalloc(sizeof(struct ct_iter_state
), GFP_KERNEL
);
213 ret
= seq_open(file
, &ct_seq_ops
);
216 seq
= file
->private_data
;
218 memset(st
, 0, sizeof(struct ct_iter_state
));
225 static const struct file_operations ct_file_ops
= {
226 .owner
= THIS_MODULE
,
230 .release
= seq_release_private
,
234 static void *exp_seq_start(struct seq_file
*s
, loff_t
*pos
)
236 struct list_head
*e
= &ip_conntrack_expect_list
;
239 /* strange seq_file api calls stop even if we fail,
240 * thus we need to grab lock since stop unlocks */
241 read_lock_bh(&ip_conntrack_lock
);
246 for (i
= 0; i
<= *pos
; i
++) {
248 if (e
== &ip_conntrack_expect_list
)
254 static void *exp_seq_next(struct seq_file
*s
, void *v
, loff_t
*pos
)
256 struct list_head
*e
= v
;
261 if (e
== &ip_conntrack_expect_list
)
267 static void exp_seq_stop(struct seq_file
*s
, void *v
)
269 read_unlock_bh(&ip_conntrack_lock
);
272 static int exp_seq_show(struct seq_file
*s
, void *v
)
274 struct ip_conntrack_expect
*expect
= v
;
276 if (expect
->timeout
.function
)
277 seq_printf(s
, "%ld ", timer_pending(&expect
->timeout
)
278 ? (long)(expect
->timeout
.expires
- jiffies
)/HZ
: 0);
282 seq_printf(s
, "proto=%u ", expect
->tuple
.dst
.protonum
);
284 print_tuple(s
, &expect
->tuple
,
285 __ip_conntrack_proto_find(expect
->tuple
.dst
.protonum
));
286 return seq_putc(s
, '\n');
289 static struct seq_operations exp_seq_ops
= {
290 .start
= exp_seq_start
,
291 .next
= exp_seq_next
,
292 .stop
= exp_seq_stop
,
296 static int exp_open(struct inode
*inode
, struct file
*file
)
298 return seq_open(file
, &exp_seq_ops
);
301 static const struct file_operations exp_file_ops
= {
302 .owner
= THIS_MODULE
,
306 .release
= seq_release
309 static void *ct_cpu_seq_start(struct seq_file
*seq
, loff_t
*pos
)
314 return SEQ_START_TOKEN
;
316 for (cpu
= *pos
-1; cpu
< NR_CPUS
; ++cpu
) {
317 if (!cpu_possible(cpu
))
320 return &per_cpu(ip_conntrack_stat
, cpu
);
326 static void *ct_cpu_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
330 for (cpu
= *pos
; cpu
< NR_CPUS
; ++cpu
) {
331 if (!cpu_possible(cpu
))
334 return &per_cpu(ip_conntrack_stat
, cpu
);
340 static void ct_cpu_seq_stop(struct seq_file
*seq
, void *v
)
344 static int ct_cpu_seq_show(struct seq_file
*seq
, void *v
)
346 unsigned int nr_conntracks
= atomic_read(&ip_conntrack_count
);
347 struct ip_conntrack_stat
*st
= v
;
349 if (v
== SEQ_START_TOKEN
) {
350 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");
354 seq_printf(seq
, "%08x %08x %08x %08x %08x %08x %08x %08x "
355 "%08x %08x %08x %08x %08x %08x %08x %08x \n",
377 static struct seq_operations ct_cpu_seq_ops
= {
378 .start
= ct_cpu_seq_start
,
379 .next
= ct_cpu_seq_next
,
380 .stop
= ct_cpu_seq_stop
,
381 .show
= ct_cpu_seq_show
,
384 static int ct_cpu_seq_open(struct inode
*inode
, struct file
*file
)
386 return seq_open(file
, &ct_cpu_seq_ops
);
389 static const struct file_operations ct_cpu_seq_fops
= {
390 .owner
= THIS_MODULE
,
391 .open
= ct_cpu_seq_open
,
394 .release
= seq_release_private
,
398 static unsigned int ip_confirm(unsigned int hooknum
,
399 struct sk_buff
**pskb
,
400 const struct net_device
*in
,
401 const struct net_device
*out
,
402 int (*okfn
)(struct sk_buff
*))
404 /* We've seen it coming out the other side: confirm it */
405 return ip_conntrack_confirm(pskb
);
408 static unsigned int ip_conntrack_help(unsigned int hooknum
,
409 struct sk_buff
**pskb
,
410 const struct net_device
*in
,
411 const struct net_device
*out
,
412 int (*okfn
)(struct sk_buff
*))
414 struct ip_conntrack
*ct
;
415 enum ip_conntrack_info ctinfo
;
417 /* This is where we call the helper: as the packet goes out. */
418 ct
= ip_conntrack_get(*pskb
, &ctinfo
);
419 if (ct
&& ct
->helper
&& ctinfo
!= IP_CT_RELATED
+ IP_CT_IS_REPLY
) {
421 ret
= ct
->helper
->help(pskb
, ct
, ctinfo
);
422 if (ret
!= NF_ACCEPT
)
428 static unsigned int ip_conntrack_defrag(unsigned int hooknum
,
429 struct sk_buff
**pskb
,
430 const struct net_device
*in
,
431 const struct net_device
*out
,
432 int (*okfn
)(struct sk_buff
*))
434 #if !defined(CONFIG_IP_NF_NAT) && !defined(CONFIG_IP_NF_NAT_MODULE)
435 /* Previously seen (loopback)? Ignore. Do this before
441 /* Gather fragments. */
442 if ((*pskb
)->nh
.iph
->frag_off
& htons(IP_MF
|IP_OFFSET
)) {
443 *pskb
= ip_ct_gather_frags(*pskb
,
444 hooknum
== NF_IP_PRE_ROUTING
?
445 IP_DEFRAG_CONNTRACK_IN
:
446 IP_DEFRAG_CONNTRACK_OUT
);
453 static unsigned int ip_conntrack_local(unsigned int hooknum
,
454 struct sk_buff
**pskb
,
455 const struct net_device
*in
,
456 const struct net_device
*out
,
457 int (*okfn
)(struct sk_buff
*))
459 /* root is playing with raw sockets. */
460 if ((*pskb
)->len
< sizeof(struct iphdr
)
461 || (*pskb
)->nh
.iph
->ihl
* 4 < sizeof(struct iphdr
)) {
463 printk("ipt_hook: happy cracking.\n");
466 return ip_conntrack_in(hooknum
, pskb
, in
, out
, okfn
);
469 /* Connection tracking may drop packets, but never alters them, so
470 make it the first hook. */
471 static struct nf_hook_ops ip_conntrack_ops
[] = {
473 .hook
= ip_conntrack_defrag
,
474 .owner
= THIS_MODULE
,
476 .hooknum
= NF_IP_PRE_ROUTING
,
477 .priority
= NF_IP_PRI_CONNTRACK_DEFRAG
,
480 .hook
= ip_conntrack_in
,
481 .owner
= THIS_MODULE
,
483 .hooknum
= NF_IP_PRE_ROUTING
,
484 .priority
= NF_IP_PRI_CONNTRACK
,
487 .hook
= ip_conntrack_defrag
,
488 .owner
= THIS_MODULE
,
490 .hooknum
= NF_IP_LOCAL_OUT
,
491 .priority
= NF_IP_PRI_CONNTRACK_DEFRAG
,
494 .hook
= ip_conntrack_local
,
495 .owner
= THIS_MODULE
,
497 .hooknum
= NF_IP_LOCAL_OUT
,
498 .priority
= NF_IP_PRI_CONNTRACK
,
501 .hook
= ip_conntrack_help
,
502 .owner
= THIS_MODULE
,
504 .hooknum
= NF_IP_POST_ROUTING
,
505 .priority
= NF_IP_PRI_CONNTRACK_HELPER
,
508 .hook
= ip_conntrack_help
,
509 .owner
= THIS_MODULE
,
511 .hooknum
= NF_IP_LOCAL_IN
,
512 .priority
= NF_IP_PRI_CONNTRACK_HELPER
,
516 .owner
= THIS_MODULE
,
518 .hooknum
= NF_IP_POST_ROUTING
,
519 .priority
= NF_IP_PRI_CONNTRACK_CONFIRM
,
523 .owner
= THIS_MODULE
,
525 .hooknum
= NF_IP_LOCAL_IN
,
526 .priority
= NF_IP_PRI_CONNTRACK_CONFIRM
,
532 int ip_conntrack_checksum __read_mostly
= 1;
536 /* From ip_conntrack_core.c */
537 extern int ip_conntrack_max
;
538 extern unsigned int ip_conntrack_htable_size
;
540 /* From ip_conntrack_proto_tcp.c */
541 extern unsigned int ip_ct_tcp_timeout_syn_sent
;
542 extern unsigned int ip_ct_tcp_timeout_syn_recv
;
543 extern unsigned int ip_ct_tcp_timeout_established
;
544 extern unsigned int ip_ct_tcp_timeout_fin_wait
;
545 extern unsigned int ip_ct_tcp_timeout_close_wait
;
546 extern unsigned int ip_ct_tcp_timeout_last_ack
;
547 extern unsigned int ip_ct_tcp_timeout_time_wait
;
548 extern unsigned int ip_ct_tcp_timeout_close
;
549 extern unsigned int ip_ct_tcp_timeout_max_retrans
;
550 extern int ip_ct_tcp_loose
;
551 extern int ip_ct_tcp_be_liberal
;
552 extern int ip_ct_tcp_max_retrans
;
554 /* From ip_conntrack_proto_udp.c */
555 extern unsigned int ip_ct_udp_timeout
;
556 extern unsigned int ip_ct_udp_timeout_stream
;
558 /* From ip_conntrack_proto_icmp.c */
559 extern unsigned int ip_ct_icmp_timeout
;
561 /* From ip_conntrack_proto_generic.c */
562 extern unsigned int ip_ct_generic_timeout
;
564 /* Log invalid packets of a given protocol */
565 static int log_invalid_proto_min
= 0;
566 static int log_invalid_proto_max
= 255;
568 static struct ctl_table_header
*ip_ct_sysctl_header
;
570 static ctl_table ip_ct_sysctl_table
[] = {
572 .ctl_name
= NET_IPV4_NF_CONNTRACK_MAX
,
573 .procname
= "ip_conntrack_max",
574 .data
= &ip_conntrack_max
,
575 .maxlen
= sizeof(int),
577 .proc_handler
= &proc_dointvec
,
580 .ctl_name
= NET_IPV4_NF_CONNTRACK_COUNT
,
581 .procname
= "ip_conntrack_count",
582 .data
= &ip_conntrack_count
,
583 .maxlen
= sizeof(int),
585 .proc_handler
= &proc_dointvec
,
588 .ctl_name
= NET_IPV4_NF_CONNTRACK_BUCKETS
,
589 .procname
= "ip_conntrack_buckets",
590 .data
= &ip_conntrack_htable_size
,
591 .maxlen
= sizeof(unsigned int),
593 .proc_handler
= &proc_dointvec
,
596 .ctl_name
= NET_IPV4_NF_CONNTRACK_CHECKSUM
,
597 .procname
= "ip_conntrack_checksum",
598 .data
= &ip_conntrack_checksum
,
599 .maxlen
= sizeof(int),
601 .proc_handler
= &proc_dointvec
,
604 .ctl_name
= NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_SYN_SENT
,
605 .procname
= "ip_conntrack_tcp_timeout_syn_sent",
606 .data
= &ip_ct_tcp_timeout_syn_sent
,
607 .maxlen
= sizeof(unsigned int),
609 .proc_handler
= &proc_dointvec_jiffies
,
612 .ctl_name
= NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_SYN_RECV
,
613 .procname
= "ip_conntrack_tcp_timeout_syn_recv",
614 .data
= &ip_ct_tcp_timeout_syn_recv
,
615 .maxlen
= sizeof(unsigned int),
617 .proc_handler
= &proc_dointvec_jiffies
,
620 .ctl_name
= NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_ESTABLISHED
,
621 .procname
= "ip_conntrack_tcp_timeout_established",
622 .data
= &ip_ct_tcp_timeout_established
,
623 .maxlen
= sizeof(unsigned int),
625 .proc_handler
= &proc_dointvec_jiffies
,
628 .ctl_name
= NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_FIN_WAIT
,
629 .procname
= "ip_conntrack_tcp_timeout_fin_wait",
630 .data
= &ip_ct_tcp_timeout_fin_wait
,
631 .maxlen
= sizeof(unsigned int),
633 .proc_handler
= &proc_dointvec_jiffies
,
636 .ctl_name
= NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_CLOSE_WAIT
,
637 .procname
= "ip_conntrack_tcp_timeout_close_wait",
638 .data
= &ip_ct_tcp_timeout_close_wait
,
639 .maxlen
= sizeof(unsigned int),
641 .proc_handler
= &proc_dointvec_jiffies
,
644 .ctl_name
= NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_LAST_ACK
,
645 .procname
= "ip_conntrack_tcp_timeout_last_ack",
646 .data
= &ip_ct_tcp_timeout_last_ack
,
647 .maxlen
= sizeof(unsigned int),
649 .proc_handler
= &proc_dointvec_jiffies
,
652 .ctl_name
= NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_TIME_WAIT
,
653 .procname
= "ip_conntrack_tcp_timeout_time_wait",
654 .data
= &ip_ct_tcp_timeout_time_wait
,
655 .maxlen
= sizeof(unsigned int),
657 .proc_handler
= &proc_dointvec_jiffies
,
660 .ctl_name
= NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_CLOSE
,
661 .procname
= "ip_conntrack_tcp_timeout_close",
662 .data
= &ip_ct_tcp_timeout_close
,
663 .maxlen
= sizeof(unsigned int),
665 .proc_handler
= &proc_dointvec_jiffies
,
668 .ctl_name
= NET_IPV4_NF_CONNTRACK_UDP_TIMEOUT
,
669 .procname
= "ip_conntrack_udp_timeout",
670 .data
= &ip_ct_udp_timeout
,
671 .maxlen
= sizeof(unsigned int),
673 .proc_handler
= &proc_dointvec_jiffies
,
676 .ctl_name
= NET_IPV4_NF_CONNTRACK_UDP_TIMEOUT_STREAM
,
677 .procname
= "ip_conntrack_udp_timeout_stream",
678 .data
= &ip_ct_udp_timeout_stream
,
679 .maxlen
= sizeof(unsigned int),
681 .proc_handler
= &proc_dointvec_jiffies
,
684 .ctl_name
= NET_IPV4_NF_CONNTRACK_ICMP_TIMEOUT
,
685 .procname
= "ip_conntrack_icmp_timeout",
686 .data
= &ip_ct_icmp_timeout
,
687 .maxlen
= sizeof(unsigned int),
689 .proc_handler
= &proc_dointvec_jiffies
,
692 .ctl_name
= NET_IPV4_NF_CONNTRACK_GENERIC_TIMEOUT
,
693 .procname
= "ip_conntrack_generic_timeout",
694 .data
= &ip_ct_generic_timeout
,
695 .maxlen
= sizeof(unsigned int),
697 .proc_handler
= &proc_dointvec_jiffies
,
700 .ctl_name
= NET_IPV4_NF_CONNTRACK_LOG_INVALID
,
701 .procname
= "ip_conntrack_log_invalid",
702 .data
= &ip_ct_log_invalid
,
703 .maxlen
= sizeof(unsigned int),
705 .proc_handler
= &proc_dointvec_minmax
,
706 .strategy
= &sysctl_intvec
,
707 .extra1
= &log_invalid_proto_min
,
708 .extra2
= &log_invalid_proto_max
,
711 .ctl_name
= NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_MAX_RETRANS
,
712 .procname
= "ip_conntrack_tcp_timeout_max_retrans",
713 .data
= &ip_ct_tcp_timeout_max_retrans
,
714 .maxlen
= sizeof(unsigned int),
716 .proc_handler
= &proc_dointvec_jiffies
,
719 .ctl_name
= NET_IPV4_NF_CONNTRACK_TCP_LOOSE
,
720 .procname
= "ip_conntrack_tcp_loose",
721 .data
= &ip_ct_tcp_loose
,
722 .maxlen
= sizeof(unsigned int),
724 .proc_handler
= &proc_dointvec
,
727 .ctl_name
= NET_IPV4_NF_CONNTRACK_TCP_BE_LIBERAL
,
728 .procname
= "ip_conntrack_tcp_be_liberal",
729 .data
= &ip_ct_tcp_be_liberal
,
730 .maxlen
= sizeof(unsigned int),
732 .proc_handler
= &proc_dointvec
,
735 .ctl_name
= NET_IPV4_NF_CONNTRACK_TCP_MAX_RETRANS
,
736 .procname
= "ip_conntrack_tcp_max_retrans",
737 .data
= &ip_ct_tcp_max_retrans
,
738 .maxlen
= sizeof(unsigned int),
740 .proc_handler
= &proc_dointvec
,
745 #define NET_IP_CONNTRACK_MAX 2089
747 static ctl_table ip_ct_netfilter_table
[] = {
749 .ctl_name
= NET_IPV4_NETFILTER
,
750 .procname
= "netfilter",
752 .child
= ip_ct_sysctl_table
,
755 .ctl_name
= NET_IP_CONNTRACK_MAX
,
756 .procname
= "ip_conntrack_max",
757 .data
= &ip_conntrack_max
,
758 .maxlen
= sizeof(int),
760 .proc_handler
= &proc_dointvec
765 static ctl_table ip_ct_ipv4_table
[] = {
767 .ctl_name
= NET_IPV4
,
770 .child
= ip_ct_netfilter_table
,
775 static ctl_table ip_ct_net_table
[] = {
780 .child
= ip_ct_ipv4_table
,
785 EXPORT_SYMBOL(ip_ct_log_invalid
);
786 #endif /* CONFIG_SYSCTL */
788 /* FIXME: Allow NULL functions and sub in pointers to generic for
790 int ip_conntrack_protocol_register(struct ip_conntrack_protocol
*proto
)
794 write_lock_bh(&ip_conntrack_lock
);
795 if (ip_ct_protos
[proto
->proto
] != &ip_conntrack_generic_protocol
) {
799 rcu_assign_pointer(ip_ct_protos
[proto
->proto
], proto
);
801 write_unlock_bh(&ip_conntrack_lock
);
805 void ip_conntrack_protocol_unregister(struct ip_conntrack_protocol
*proto
)
807 write_lock_bh(&ip_conntrack_lock
);
808 rcu_assign_pointer(ip_ct_protos
[proto
->proto
],
809 &ip_conntrack_generic_protocol
);
810 write_unlock_bh(&ip_conntrack_lock
);
813 /* Remove all contrack entries for this protocol */
814 ip_ct_iterate_cleanup(kill_proto
, &proto
->proto
);
817 static int __init
ip_conntrack_standalone_init(void)
819 #ifdef CONFIG_PROC_FS
820 struct proc_dir_entry
*proc
, *proc_exp
, *proc_stat
;
824 ret
= ip_conntrack_init();
828 #ifdef CONFIG_PROC_FS
830 proc
= proc_net_fops_create("ip_conntrack", 0440, &ct_file_ops
);
831 if (!proc
) goto cleanup_init
;
833 proc_exp
= proc_net_fops_create("ip_conntrack_expect", 0440,
835 if (!proc_exp
) goto cleanup_proc
;
837 proc_stat
= create_proc_entry("ip_conntrack", S_IRUGO
, proc_net_stat
);
839 goto cleanup_proc_exp
;
841 proc_stat
->proc_fops
= &ct_cpu_seq_fops
;
842 proc_stat
->owner
= THIS_MODULE
;
845 ret
= nf_register_hooks(ip_conntrack_ops
, ARRAY_SIZE(ip_conntrack_ops
));
847 printk("ip_conntrack: can't register hooks.\n");
848 goto cleanup_proc_stat
;
851 ip_ct_sysctl_header
= register_sysctl_table(ip_ct_net_table
);
852 if (ip_ct_sysctl_header
== NULL
) {
853 printk("ip_conntrack: can't register to sysctl.\n");
862 nf_unregister_hooks(ip_conntrack_ops
, ARRAY_SIZE(ip_conntrack_ops
));
865 #ifdef CONFIG_PROC_FS
866 remove_proc_entry("ip_conntrack", proc_net_stat
);
868 proc_net_remove("ip_conntrack_expect");
870 proc_net_remove("ip_conntrack");
872 #endif /* CONFIG_PROC_FS */
873 ip_conntrack_cleanup();
877 static void __exit
ip_conntrack_standalone_fini(void)
881 unregister_sysctl_table(ip_ct_sysctl_header
);
883 nf_unregister_hooks(ip_conntrack_ops
, ARRAY_SIZE(ip_conntrack_ops
));
884 #ifdef CONFIG_PROC_FS
885 remove_proc_entry("ip_conntrack", proc_net_stat
);
886 proc_net_remove("ip_conntrack_expect");
887 proc_net_remove("ip_conntrack");
888 #endif /* CONFIG_PROC_FS */
889 ip_conntrack_cleanup();
892 module_init(ip_conntrack_standalone_init
);
893 module_exit(ip_conntrack_standalone_fini
);
895 /* Some modules need us, but don't depend directly on any symbol.
896 They should call this. */
897 void need_conntrack(void)
901 #ifdef CONFIG_IP_NF_CONNTRACK_EVENTS
902 EXPORT_SYMBOL_GPL(ip_conntrack_chain
);
903 EXPORT_SYMBOL_GPL(ip_conntrack_expect_chain
);
904 EXPORT_SYMBOL_GPL(ip_conntrack_register_notifier
);
905 EXPORT_SYMBOL_GPL(ip_conntrack_unregister_notifier
);
906 EXPORT_SYMBOL_GPL(__ip_ct_event_cache_init
);
907 EXPORT_PER_CPU_SYMBOL_GPL(ip_conntrack_ecache
);
909 EXPORT_SYMBOL(ip_conntrack_protocol_register
);
910 EXPORT_SYMBOL(ip_conntrack_protocol_unregister
);
911 EXPORT_SYMBOL(ip_ct_get_tuple
);
912 EXPORT_SYMBOL(invert_tuplepr
);
913 EXPORT_SYMBOL(ip_conntrack_alter_reply
);
914 EXPORT_SYMBOL(ip_conntrack_destroyed
);
915 EXPORT_SYMBOL(need_conntrack
);
916 EXPORT_SYMBOL(ip_conntrack_helper_register
);
917 EXPORT_SYMBOL(ip_conntrack_helper_unregister
);
918 EXPORT_SYMBOL(ip_ct_iterate_cleanup
);
919 EXPORT_SYMBOL(__ip_ct_refresh_acct
);
921 EXPORT_SYMBOL(ip_conntrack_expect_alloc
);
922 EXPORT_SYMBOL(ip_conntrack_expect_put
);
923 EXPORT_SYMBOL_GPL(__ip_conntrack_expect_find
);
924 EXPORT_SYMBOL_GPL(ip_conntrack_expect_find_get
);
925 EXPORT_SYMBOL(ip_conntrack_expect_related
);
926 EXPORT_SYMBOL(ip_conntrack_unexpect_related
);
927 EXPORT_SYMBOL_GPL(ip_conntrack_expect_list
);
928 EXPORT_SYMBOL_GPL(ip_ct_unlink_expect
);
930 EXPORT_SYMBOL(ip_conntrack_tuple_taken
);
931 EXPORT_SYMBOL(ip_ct_gather_frags
);
932 EXPORT_SYMBOL(ip_conntrack_htable_size
);
933 EXPORT_SYMBOL(ip_conntrack_lock
);
934 EXPORT_SYMBOL(ip_conntrack_hash
);
935 EXPORT_SYMBOL(ip_conntrack_untracked
);
936 EXPORT_SYMBOL_GPL(ip_conntrack_find_get
);
937 #ifdef CONFIG_IP_NF_NAT_NEEDED
938 EXPORT_SYMBOL(ip_conntrack_tcp_update
);
941 EXPORT_SYMBOL_GPL(ip_conntrack_flush
);
942 EXPORT_SYMBOL_GPL(__ip_conntrack_find
);
944 EXPORT_SYMBOL_GPL(ip_conntrack_alloc
);
945 EXPORT_SYMBOL_GPL(ip_conntrack_free
);
946 EXPORT_SYMBOL_GPL(ip_conntrack_hash_insert
);
948 EXPORT_SYMBOL_GPL(ip_ct_remove_expectations
);
950 EXPORT_SYMBOL_GPL(ip_conntrack_helper_find_get
);
951 EXPORT_SYMBOL_GPL(ip_conntrack_helper_put
);
952 EXPORT_SYMBOL_GPL(__ip_conntrack_helper_find_byname
);
954 EXPORT_SYMBOL_GPL(ip_conntrack_proto_find_get
);
955 EXPORT_SYMBOL_GPL(ip_conntrack_proto_put
);
956 EXPORT_SYMBOL_GPL(__ip_conntrack_proto_find
);
957 EXPORT_SYMBOL_GPL(ip_conntrack_checksum
);
958 #if defined(CONFIG_IP_NF_CONNTRACK_NETLINK) || \
959 defined(CONFIG_IP_NF_CONNTRACK_NETLINK_MODULE)
960 EXPORT_SYMBOL_GPL(ip_ct_port_tuple_to_nfattr
);
961 EXPORT_SYMBOL_GPL(ip_ct_port_nfattr_to_tuple
);