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) 2002-2004 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>
31 #define ASSERT_READ_LOCK(x) MUST_BE_READ_LOCKED(&ip_conntrack_lock)
32 #define ASSERT_WRITE_LOCK(x) MUST_BE_WRITE_LOCKED(&ip_conntrack_lock)
34 #include <linux/netfilter_ipv4/ip_conntrack.h>
35 #include <linux/netfilter_ipv4/ip_conntrack_protocol.h>
36 #include <linux/netfilter_ipv4/ip_conntrack_core.h>
37 #include <linux/netfilter_ipv4/ip_conntrack_helper.h>
38 #include <linux/netfilter_ipv4/listhelp.h>
43 #define DEBUGP(format, args...)
46 MODULE_LICENSE("GPL");
48 extern atomic_t ip_conntrack_count;
49 DECLARE_PER_CPU(struct ip_conntrack_stat, ip_conntrack_stat);
51 static int kill_proto(struct ip_conntrack *i, void *data)
53 return (i->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.protonum ==
54 *((u_int8_t *) data));
59 print_tuple(struct seq_file *s, const struct ip_conntrack_tuple *tuple,
60 struct ip_conntrack_protocol *proto)
62 seq_printf(s, "src=%u.%u.%u.%u dst=%u.%u.%u.%u ",
63 NIPQUAD(tuple->src.ip), NIPQUAD(tuple->dst.ip));
64 return proto->print_tuple(s, tuple);
67 #ifdef CONFIG_IP_NF_CT_ACCT
69 seq_print_counters(struct seq_file *s,
70 const struct ip_conntrack_counter *counter)
72 return seq_printf(s, "packets=%llu bytes=%llu ",
73 (unsigned long long)counter->packets,
74 (unsigned long long)counter->bytes);
77 #define seq_print_counters(x, y) 0
80 struct ct_iter_state {
84 static struct list_head *ct_get_first(struct seq_file *seq)
86 struct ct_iter_state *st = seq->private;
89 st->bucket < ip_conntrack_htable_size;
91 if (!list_empty(&ip_conntrack_hash[st->bucket]))
92 return ip_conntrack_hash[st->bucket].next;
97 static struct list_head *ct_get_next(struct seq_file *seq, struct list_head *head)
99 struct ct_iter_state *st = seq->private;
102 while (head == &ip_conntrack_hash[st->bucket]) {
103 if (++st->bucket >= ip_conntrack_htable_size)
105 head = ip_conntrack_hash[st->bucket].next;
110 static struct list_head *ct_get_idx(struct seq_file *seq, loff_t pos)
112 struct list_head *head = ct_get_first(seq);
115 while (pos && (head = ct_get_next(seq, head)))
117 return pos ? NULL : head;
120 static void *ct_seq_start(struct seq_file *seq, loff_t *pos)
122 READ_LOCK(&ip_conntrack_lock);
123 return ct_get_idx(seq, *pos);
126 static void *ct_seq_next(struct seq_file *s, void *v, loff_t *pos)
129 return ct_get_next(s, v);
132 static void ct_seq_stop(struct seq_file *s, void *v)
134 READ_UNLOCK(&ip_conntrack_lock);
137 static int ct_seq_show(struct seq_file *s, void *v)
139 const struct ip_conntrack_tuple_hash *hash = v;
140 const struct ip_conntrack *conntrack = tuplehash_to_ctrack(hash);
141 struct ip_conntrack_protocol *proto;
143 MUST_BE_READ_LOCKED(&ip_conntrack_lock);
144 IP_NF_ASSERT(conntrack);
146 /* we only want to print DIR_ORIGINAL */
150 proto = ip_ct_find_proto(conntrack->tuplehash[IP_CT_DIR_ORIGINAL]
151 .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=%lu ", 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(&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;
261 if (e == &ip_conntrack_expect_list)
267 static void exp_seq_stop(struct seq_file *s, void *v)
269 READ_UNLOCK(&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_ct_find_proto(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 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 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 struct ip_conntrack *ct;
405 enum ip_conntrack_info ctinfo;
407 /* This is where we call the helper: as the packet goes out. */
408 ct = ip_conntrack_get(*pskb, &ctinfo);
409 if (ct && ct->helper) {
411 ret = ct->helper->help(pskb, ct, ctinfo);
412 if (ret != NF_ACCEPT)
416 /* We've seen it coming out the other side: confirm it */
417 return ip_conntrack_confirm(pskb);
420 static unsigned int ip_conntrack_defrag(unsigned int hooknum,
421 struct sk_buff **pskb,
422 const struct net_device *in,
423 const struct net_device *out,
424 int (*okfn)(struct sk_buff *))
426 #if !defined(CONFIG_IP_NF_NAT) && !defined(CONFIG_IP_NF_NAT_MODULE)
427 /* Previously seen (loopback)? Ignore. Do this before
433 /* Gather fragments. */
434 if ((*pskb)->nh.iph->frag_off & htons(IP_MF|IP_OFFSET)) {
435 *pskb = ip_ct_gather_frags(*pskb,
436 hooknum == NF_IP_PRE_ROUTING ?
437 IP_DEFRAG_CONNTRACK_IN :
438 IP_DEFRAG_CONNTRACK_OUT);
445 static unsigned int ip_refrag(unsigned int hooknum,
446 struct sk_buff **pskb,
447 const struct net_device *in,
448 const struct net_device *out,
449 int (*okfn)(struct sk_buff *))
451 struct rtable *rt = (struct rtable *)(*pskb)->dst;
453 /* We've seen it coming out the other side: confirm */
454 if (ip_confirm(hooknum, pskb, in, out, okfn) != NF_ACCEPT)
457 /* Local packets are never produced too large for their
458 interface. We degfragment them at LOCAL_OUT, however,
459 so we have to refragment them here. */
460 if ((*pskb)->len > dst_mtu(&rt->u.dst) &&
461 !skb_shinfo(*pskb)->tso_size) {
462 /* No hook can be after us, so this should be OK. */
463 ip_fragment(*pskb, okfn);
469 static unsigned int ip_conntrack_local(unsigned int hooknum,
470 struct sk_buff **pskb,
471 const struct net_device *in,
472 const struct net_device *out,
473 int (*okfn)(struct sk_buff *))
475 /* root is playing with raw sockets. */
476 if ((*pskb)->len < sizeof(struct iphdr)
477 || (*pskb)->nh.iph->ihl * 4 < sizeof(struct iphdr)) {
479 printk("ipt_hook: happy cracking.\n");
482 return ip_conntrack_in(hooknum, pskb, in, out, okfn);
485 /* Connection tracking may drop packets, but never alters them, so
486 make it the first hook. */
487 static struct nf_hook_ops ip_conntrack_defrag_ops = {
488 .hook = ip_conntrack_defrag,
489 .owner = THIS_MODULE,
491 .hooknum = NF_IP_PRE_ROUTING,
492 .priority = NF_IP_PRI_CONNTRACK_DEFRAG,
495 static struct nf_hook_ops ip_conntrack_in_ops = {
496 .hook = ip_conntrack_in,
497 .owner = THIS_MODULE,
499 .hooknum = NF_IP_PRE_ROUTING,
500 .priority = NF_IP_PRI_CONNTRACK,
503 static struct nf_hook_ops ip_conntrack_defrag_local_out_ops = {
504 .hook = ip_conntrack_defrag,
505 .owner = THIS_MODULE,
507 .hooknum = NF_IP_LOCAL_OUT,
508 .priority = NF_IP_PRI_CONNTRACK_DEFRAG,
511 static struct nf_hook_ops ip_conntrack_local_out_ops = {
512 .hook = ip_conntrack_local,
513 .owner = THIS_MODULE,
515 .hooknum = NF_IP_LOCAL_OUT,
516 .priority = NF_IP_PRI_CONNTRACK,
519 /* Refragmenter; last chance. */
520 static struct nf_hook_ops ip_conntrack_out_ops = {
522 .owner = THIS_MODULE,
524 .hooknum = NF_IP_POST_ROUTING,
525 .priority = NF_IP_PRI_LAST,
528 static struct nf_hook_ops ip_conntrack_local_in_ops = {
530 .owner = THIS_MODULE,
532 .hooknum = NF_IP_LOCAL_IN,
533 .priority = NF_IP_PRI_LAST-1,
540 /* From ip_conntrack_core.c */
541 extern int ip_conntrack_max;
542 extern unsigned int ip_conntrack_htable_size;
544 /* From ip_conntrack_proto_tcp.c */
545 extern unsigned long ip_ct_tcp_timeout_syn_sent;
546 extern unsigned long ip_ct_tcp_timeout_syn_recv;
547 extern unsigned long ip_ct_tcp_timeout_established;
548 extern unsigned long ip_ct_tcp_timeout_fin_wait;
549 extern unsigned long ip_ct_tcp_timeout_close_wait;
550 extern unsigned long ip_ct_tcp_timeout_last_ack;
551 extern unsigned long ip_ct_tcp_timeout_time_wait;
552 extern unsigned long ip_ct_tcp_timeout_close;
553 extern unsigned long ip_ct_tcp_timeout_max_retrans;
554 extern int ip_ct_tcp_loose;
555 extern int ip_ct_tcp_be_liberal;
556 extern int ip_ct_tcp_max_retrans;
558 /* From ip_conntrack_proto_udp.c */
559 extern unsigned long ip_ct_udp_timeout;
560 extern unsigned long ip_ct_udp_timeout_stream;
562 /* From ip_conntrack_proto_icmp.c */
563 extern unsigned long ip_ct_icmp_timeout;
565 /* From ip_conntrack_proto_icmp.c */
566 extern unsigned long ip_ct_generic_timeout;
568 /* Log invalid packets of a given protocol */
569 static int log_invalid_proto_min = 0;
570 static int log_invalid_proto_max = 255;
572 static struct ctl_table_header *ip_ct_sysctl_header;
574 static ctl_table ip_ct_sysctl_table[] = {
576 .ctl_name = NET_IPV4_NF_CONNTRACK_MAX,
577 .procname = "ip_conntrack_max",
578 .data = &ip_conntrack_max,
579 .maxlen = sizeof(int),
581 .proc_handler = &proc_dointvec,
584 .ctl_name = NET_IPV4_NF_CONNTRACK_COUNT,
585 .procname = "ip_conntrack_count",
586 .data = &ip_conntrack_count,
587 .maxlen = sizeof(int),
589 .proc_handler = &proc_dointvec,
592 .ctl_name = NET_IPV4_NF_CONNTRACK_BUCKETS,
593 .procname = "ip_conntrack_buckets",
594 .data = &ip_conntrack_htable_size,
595 .maxlen = sizeof(unsigned int),
597 .proc_handler = &proc_dointvec,
600 .ctl_name = NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_SYN_SENT,
601 .procname = "ip_conntrack_tcp_timeout_syn_sent",
602 .data = &ip_ct_tcp_timeout_syn_sent,
603 .maxlen = sizeof(unsigned int),
605 .proc_handler = &proc_dointvec_jiffies,
608 .ctl_name = NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_SYN_RECV,
609 .procname = "ip_conntrack_tcp_timeout_syn_recv",
610 .data = &ip_ct_tcp_timeout_syn_recv,
611 .maxlen = sizeof(unsigned int),
613 .proc_handler = &proc_dointvec_jiffies,
616 .ctl_name = NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_ESTABLISHED,
617 .procname = "ip_conntrack_tcp_timeout_established",
618 .data = &ip_ct_tcp_timeout_established,
619 .maxlen = sizeof(unsigned int),
621 .proc_handler = &proc_dointvec_jiffies,
624 .ctl_name = NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_FIN_WAIT,
625 .procname = "ip_conntrack_tcp_timeout_fin_wait",
626 .data = &ip_ct_tcp_timeout_fin_wait,
627 .maxlen = sizeof(unsigned int),
629 .proc_handler = &proc_dointvec_jiffies,
632 .ctl_name = NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_CLOSE_WAIT,
633 .procname = "ip_conntrack_tcp_timeout_close_wait",
634 .data = &ip_ct_tcp_timeout_close_wait,
635 .maxlen = sizeof(unsigned int),
637 .proc_handler = &proc_dointvec_jiffies,
640 .ctl_name = NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_LAST_ACK,
641 .procname = "ip_conntrack_tcp_timeout_last_ack",
642 .data = &ip_ct_tcp_timeout_last_ack,
643 .maxlen = sizeof(unsigned int),
645 .proc_handler = &proc_dointvec_jiffies,
648 .ctl_name = NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_TIME_WAIT,
649 .procname = "ip_conntrack_tcp_timeout_time_wait",
650 .data = &ip_ct_tcp_timeout_time_wait,
651 .maxlen = sizeof(unsigned int),
653 .proc_handler = &proc_dointvec_jiffies,
656 .ctl_name = NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_CLOSE,
657 .procname = "ip_conntrack_tcp_timeout_close",
658 .data = &ip_ct_tcp_timeout_close,
659 .maxlen = sizeof(unsigned int),
661 .proc_handler = &proc_dointvec_jiffies,
664 .ctl_name = NET_IPV4_NF_CONNTRACK_UDP_TIMEOUT,
665 .procname = "ip_conntrack_udp_timeout",
666 .data = &ip_ct_udp_timeout,
667 .maxlen = sizeof(unsigned int),
669 .proc_handler = &proc_dointvec_jiffies,
672 .ctl_name = NET_IPV4_NF_CONNTRACK_UDP_TIMEOUT_STREAM,
673 .procname = "ip_conntrack_udp_timeout_stream",
674 .data = &ip_ct_udp_timeout_stream,
675 .maxlen = sizeof(unsigned int),
677 .proc_handler = &proc_dointvec_jiffies,
680 .ctl_name = NET_IPV4_NF_CONNTRACK_ICMP_TIMEOUT,
681 .procname = "ip_conntrack_icmp_timeout",
682 .data = &ip_ct_icmp_timeout,
683 .maxlen = sizeof(unsigned int),
685 .proc_handler = &proc_dointvec_jiffies,
688 .ctl_name = NET_IPV4_NF_CONNTRACK_GENERIC_TIMEOUT,
689 .procname = "ip_conntrack_generic_timeout",
690 .data = &ip_ct_generic_timeout,
691 .maxlen = sizeof(unsigned int),
693 .proc_handler = &proc_dointvec_jiffies,
696 .ctl_name = NET_IPV4_NF_CONNTRACK_LOG_INVALID,
697 .procname = "ip_conntrack_log_invalid",
698 .data = &ip_ct_log_invalid,
699 .maxlen = sizeof(unsigned int),
701 .proc_handler = &proc_dointvec_minmax,
702 .strategy = &sysctl_intvec,
703 .extra1 = &log_invalid_proto_min,
704 .extra2 = &log_invalid_proto_max,
707 .ctl_name = NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_MAX_RETRANS,
708 .procname = "ip_conntrack_tcp_timeout_max_retrans",
709 .data = &ip_ct_tcp_timeout_max_retrans,
710 .maxlen = sizeof(unsigned int),
712 .proc_handler = &proc_dointvec_jiffies,
715 .ctl_name = NET_IPV4_NF_CONNTRACK_TCP_LOOSE,
716 .procname = "ip_conntrack_tcp_loose",
717 .data = &ip_ct_tcp_loose,
718 .maxlen = sizeof(unsigned int),
720 .proc_handler = &proc_dointvec,
723 .ctl_name = NET_IPV4_NF_CONNTRACK_TCP_BE_LIBERAL,
724 .procname = "ip_conntrack_tcp_be_liberal",
725 .data = &ip_ct_tcp_be_liberal,
726 .maxlen = sizeof(unsigned int),
728 .proc_handler = &proc_dointvec,
731 .ctl_name = NET_IPV4_NF_CONNTRACK_TCP_MAX_RETRANS,
732 .procname = "ip_conntrack_tcp_max_retrans",
733 .data = &ip_ct_tcp_max_retrans,
734 .maxlen = sizeof(unsigned int),
736 .proc_handler = &proc_dointvec,
741 #define NET_IP_CONNTRACK_MAX 2089
743 static ctl_table ip_ct_netfilter_table[] = {
745 .ctl_name = NET_IPV4_NETFILTER,
746 .procname = "netfilter",
748 .child = ip_ct_sysctl_table,
751 .ctl_name = NET_IP_CONNTRACK_MAX,
752 .procname = "ip_conntrack_max",
753 .data = &ip_conntrack_max,
754 .maxlen = sizeof(int),
756 .proc_handler = &proc_dointvec
761 static ctl_table ip_ct_ipv4_table[] = {
763 .ctl_name = NET_IPV4,
766 .child = ip_ct_netfilter_table,
771 static ctl_table ip_ct_net_table[] = {
776 .child = ip_ct_ipv4_table,
781 EXPORT_SYMBOL(ip_ct_log_invalid);
782 #endif /* CONFIG_SYSCTL */
784 static int init_or_cleanup(int init)
786 #ifdef CONFIG_PROC_FS
787 struct proc_dir_entry *proc, *proc_exp, *proc_stat;
791 if (!init) goto cleanup;
793 ret = ip_conntrack_init();
795 goto cleanup_nothing;
797 #ifdef CONFIG_PROC_FS
799 proc = proc_net_fops_create("ip_conntrack", 0440, &ct_file_ops);
800 if (!proc) goto cleanup_init;
802 proc_exp = proc_net_fops_create("ip_conntrack_expect", 0440,
804 if (!proc_exp) goto cleanup_proc;
806 proc_stat = create_proc_entry("ip_conntrack", S_IRUGO, proc_net_stat);
808 goto cleanup_proc_exp;
810 proc_stat->proc_fops = &ct_cpu_seq_fops;
811 proc_stat->owner = THIS_MODULE;
814 ret = nf_register_hook(&ip_conntrack_defrag_ops);
816 printk("ip_conntrack: can't register pre-routing defrag hook.\n");
817 goto cleanup_proc_stat;
819 ret = nf_register_hook(&ip_conntrack_defrag_local_out_ops);
821 printk("ip_conntrack: can't register local_out defrag hook.\n");
822 goto cleanup_defragops;
824 ret = nf_register_hook(&ip_conntrack_in_ops);
826 printk("ip_conntrack: can't register pre-routing hook.\n");
827 goto cleanup_defraglocalops;
829 ret = nf_register_hook(&ip_conntrack_local_out_ops);
831 printk("ip_conntrack: can't register local out hook.\n");
834 ret = nf_register_hook(&ip_conntrack_out_ops);
836 printk("ip_conntrack: can't register post-routing hook.\n");
837 goto cleanup_inandlocalops;
839 ret = nf_register_hook(&ip_conntrack_local_in_ops);
841 printk("ip_conntrack: can't register local in hook.\n");
842 goto cleanup_inoutandlocalops;
845 ip_ct_sysctl_header = register_sysctl_table(ip_ct_net_table, 0);
846 if (ip_ct_sysctl_header == NULL) {
847 printk("ip_conntrack: can't register to sysctl.\n");
849 goto cleanup_localinops;
857 unregister_sysctl_table(ip_ct_sysctl_header);
860 nf_unregister_hook(&ip_conntrack_local_in_ops);
861 cleanup_inoutandlocalops:
862 nf_unregister_hook(&ip_conntrack_out_ops);
863 cleanup_inandlocalops:
864 nf_unregister_hook(&ip_conntrack_local_out_ops);
866 nf_unregister_hook(&ip_conntrack_in_ops);
867 cleanup_defraglocalops:
868 nf_unregister_hook(&ip_conntrack_defrag_local_out_ops);
870 nf_unregister_hook(&ip_conntrack_defrag_ops);
872 #ifdef CONFIG_PROC_FS
873 remove_proc_entry("ip_conntrack", proc_net_stat);
875 proc_net_remove("ip_conntrack_expect");
877 proc_net_remove("ip_conntrack");
879 #endif /* CONFIG_PROC_FS */
880 ip_conntrack_cleanup();
885 /* FIXME: Allow NULL functions and sub in pointers to generic for
887 int ip_conntrack_protocol_register(struct ip_conntrack_protocol *proto)
891 WRITE_LOCK(&ip_conntrack_lock);
892 if (ip_ct_protos[proto->proto] != &ip_conntrack_generic_protocol) {
896 ip_ct_protos[proto->proto] = proto;
898 WRITE_UNLOCK(&ip_conntrack_lock);
902 void ip_conntrack_protocol_unregister(struct ip_conntrack_protocol *proto)
904 WRITE_LOCK(&ip_conntrack_lock);
905 ip_ct_protos[proto->proto] = &ip_conntrack_generic_protocol;
906 WRITE_UNLOCK(&ip_conntrack_lock);
908 /* Somebody could be still looking at the proto in bh. */
911 /* Remove all contrack entries for this protocol */
912 ip_ct_iterate_cleanup(kill_proto, &proto->proto);
915 static int __init init(void)
917 return init_or_cleanup(1);
920 static void __exit fini(void)
928 /* Some modules need us, but don't depend directly on any symbol.
929 They should call this. */
930 void need_ip_conntrack(void)
934 EXPORT_SYMBOL(ip_conntrack_protocol_register);
935 EXPORT_SYMBOL(ip_conntrack_protocol_unregister);
936 EXPORT_SYMBOL(ip_ct_get_tuple);
937 EXPORT_SYMBOL(invert_tuplepr);
938 EXPORT_SYMBOL(ip_conntrack_alter_reply);
939 EXPORT_SYMBOL(ip_conntrack_destroyed);
940 EXPORT_SYMBOL(need_ip_conntrack);
941 EXPORT_SYMBOL(ip_conntrack_helper_register);
942 EXPORT_SYMBOL(ip_conntrack_helper_unregister);
943 EXPORT_SYMBOL(ip_ct_iterate_cleanup);
944 EXPORT_SYMBOL(ip_ct_refresh_acct);
945 EXPORT_SYMBOL(ip_ct_protos);
946 EXPORT_SYMBOL(ip_ct_find_proto);
947 EXPORT_SYMBOL(ip_conntrack_expect_alloc);
948 EXPORT_SYMBOL(ip_conntrack_expect_free);
949 EXPORT_SYMBOL(ip_conntrack_expect_related);
950 EXPORT_SYMBOL(ip_conntrack_unexpect_related);
951 EXPORT_SYMBOL(ip_conntrack_tuple_taken);
952 EXPORT_SYMBOL(ip_ct_gather_frags);
953 EXPORT_SYMBOL(ip_conntrack_htable_size);
954 EXPORT_SYMBOL(ip_conntrack_lock);
955 EXPORT_SYMBOL(ip_conntrack_hash);
956 EXPORT_SYMBOL(ip_conntrack_untracked);
957 EXPORT_SYMBOL_GPL(ip_conntrack_find_get);
958 EXPORT_SYMBOL_GPL(ip_conntrack_put);
959 #ifdef CONFIG_IP_NF_NAT_NEEDED
960 EXPORT_SYMBOL(ip_conntrack_tcp_update);