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 defined(CONFIG_VNET) || defined(CONFIG_VNET_MODULE)
170 if (seq_printf(s, "xid=%d\n", conntrack->xid[IP_CT_DIR_ORIGINAL]))
174 if (seq_print_counters(s, &conntrack->counters[IP_CT_DIR_ORIGINAL]))
177 if (!(test_bit(IPS_SEEN_REPLY_BIT, &conntrack->status)))
178 if (seq_printf(s, "[UNREPLIED] "))
181 if (print_tuple(s, &conntrack->tuplehash[IP_CT_DIR_REPLY].tuple,
185 #if defined(CONFIG_VNET) || defined(CONFIG_VNET_MODULE)
186 if (seq_printf(s, "xid=%d\n", conntrack->xid[IP_CT_DIR_REPLY]))
190 if (seq_print_counters(s, &conntrack->counters[IP_CT_DIR_REPLY]))
193 if (test_bit(IPS_ASSURED_BIT, &conntrack->status))
194 if (seq_printf(s, "[ASSURED] "))
197 #if defined(CONFIG_IP_NF_CONNTRACK_MARK)
198 if (seq_printf(s, "mark=%lu ", conntrack->mark))
202 if (seq_printf(s, "use=%u\n", atomic_read(&conntrack->ct_general.use)))
208 static struct seq_operations ct_seq_ops = {
209 .start = ct_seq_start,
215 static int ct_open(struct inode *inode, struct file *file)
217 struct seq_file *seq;
218 struct ct_iter_state *st;
221 st = kmalloc(sizeof(struct ct_iter_state), GFP_KERNEL);
224 ret = seq_open(file, &ct_seq_ops);
227 seq = file->private_data;
229 memset(st, 0, sizeof(struct ct_iter_state));
236 static struct file_operations ct_file_ops = {
237 .owner = THIS_MODULE,
241 .release = seq_release_private,
245 static void *exp_seq_start(struct seq_file *s, loff_t *pos)
247 struct list_head *e = &ip_conntrack_expect_list;
250 /* strange seq_file api calls stop even if we fail,
251 * thus we need to grab lock since stop unlocks */
252 READ_LOCK(&ip_conntrack_lock);
257 for (i = 0; i <= *pos; i++) {
259 if (e == &ip_conntrack_expect_list)
265 static void *exp_seq_next(struct seq_file *s, void *v, loff_t *pos)
267 struct list_head *e = v;
272 if (e == &ip_conntrack_expect_list)
278 static void exp_seq_stop(struct seq_file *s, void *v)
280 READ_UNLOCK(&ip_conntrack_lock);
283 static int exp_seq_show(struct seq_file *s, void *v)
285 struct ip_conntrack_expect *expect = v;
287 if (expect->timeout.function)
288 seq_printf(s, "%ld ", timer_pending(&expect->timeout)
289 ? (long)(expect->timeout.expires - jiffies)/HZ : 0);
293 seq_printf(s, "proto=%u ", expect->tuple.dst.protonum);
295 print_tuple(s, &expect->tuple,
296 ip_ct_find_proto(expect->tuple.dst.protonum));
297 return seq_putc(s, '\n');
300 static struct seq_operations exp_seq_ops = {
301 .start = exp_seq_start,
302 .next = exp_seq_next,
303 .stop = exp_seq_stop,
307 static int exp_open(struct inode *inode, struct file *file)
309 return seq_open(file, &exp_seq_ops);
312 static struct file_operations exp_file_ops = {
313 .owner = THIS_MODULE,
317 .release = seq_release
320 static void *ct_cpu_seq_start(struct seq_file *seq, loff_t *pos)
325 return SEQ_START_TOKEN;
327 for (cpu = *pos-1; cpu < NR_CPUS; ++cpu) {
328 if (!cpu_possible(cpu))
331 return &per_cpu(ip_conntrack_stat, cpu);
337 static void *ct_cpu_seq_next(struct seq_file *seq, void *v, loff_t *pos)
341 for (cpu = *pos; cpu < NR_CPUS; ++cpu) {
342 if (!cpu_possible(cpu))
345 return &per_cpu(ip_conntrack_stat, cpu);
351 static void ct_cpu_seq_stop(struct seq_file *seq, void *v)
355 static int ct_cpu_seq_show(struct seq_file *seq, void *v)
357 unsigned int nr_conntracks = atomic_read(&ip_conntrack_count);
358 struct ip_conntrack_stat *st = v;
360 if (v == SEQ_START_TOKEN) {
361 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");
365 seq_printf(seq, "%08x %08x %08x %08x %08x %08x %08x %08x "
366 "%08x %08x %08x %08x %08x %08x %08x %08x \n",
388 static struct seq_operations ct_cpu_seq_ops = {
389 .start = ct_cpu_seq_start,
390 .next = ct_cpu_seq_next,
391 .stop = ct_cpu_seq_stop,
392 .show = ct_cpu_seq_show,
395 static int ct_cpu_seq_open(struct inode *inode, struct file *file)
397 return seq_open(file, &ct_cpu_seq_ops);
400 static struct file_operations ct_cpu_seq_fops = {
401 .owner = THIS_MODULE,
402 .open = ct_cpu_seq_open,
405 .release = seq_release_private,
409 static unsigned int ip_confirm(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 /* We've seen it coming out the other side: confirm it */
416 return ip_conntrack_confirm(pskb);
419 static unsigned int ip_conntrack_help(unsigned int hooknum,
420 struct sk_buff **pskb,
421 const struct net_device *in,
422 const struct net_device *out,
423 int (*okfn)(struct sk_buff *))
425 struct ip_conntrack *ct;
426 enum ip_conntrack_info ctinfo;
428 /* This is where we call the helper: as the packet goes out. */
429 ct = ip_conntrack_get(*pskb, &ctinfo);
430 if (ct && ct->helper) {
432 ret = ct->helper->help(pskb, ct, ctinfo);
433 if (ret != NF_ACCEPT)
439 static unsigned int ip_conntrack_defrag(unsigned int hooknum,
440 struct sk_buff **pskb,
441 const struct net_device *in,
442 const struct net_device *out,
443 int (*okfn)(struct sk_buff *))
445 /* Gather fragments. */
446 if ((*pskb)->nh.iph->frag_off & htons(IP_MF|IP_OFFSET)) {
447 *pskb = ip_ct_gather_frags(*pskb,
448 hooknum == NF_IP_PRE_ROUTING ?
449 IP_DEFRAG_CONNTRACK_IN :
450 IP_DEFRAG_CONNTRACK_OUT);
457 static unsigned int ip_refrag(unsigned int hooknum,
458 struct sk_buff **pskb,
459 const struct net_device *in,
460 const struct net_device *out,
461 int (*okfn)(struct sk_buff *))
463 struct rtable *rt = (struct rtable *)(*pskb)->dst;
465 /* We've seen it coming out the other side: confirm */
466 if (ip_confirm(hooknum, pskb, in, out, okfn) != NF_ACCEPT)
469 /* Local packets are never produced too large for their
470 interface. We degfragment them at LOCAL_OUT, however,
471 so we have to refragment them here. */
472 if ((*pskb)->len > dst_mtu(&rt->u.dst) &&
473 !skb_shinfo(*pskb)->tso_size) {
474 /* No hook can be after us, so this should be OK. */
475 ip_fragment(*pskb, okfn);
481 static unsigned int ip_conntrack_local(unsigned int hooknum,
482 struct sk_buff **pskb,
483 const struct net_device *in,
484 const struct net_device *out,
485 int (*okfn)(struct sk_buff *))
487 /* root is playing with raw sockets. */
488 if ((*pskb)->len < sizeof(struct iphdr)
489 || (*pskb)->nh.iph->ihl * 4 < sizeof(struct iphdr)) {
491 printk("ipt_hook: happy cracking.\n");
494 return ip_conntrack_in(hooknum, pskb, in, out, okfn);
497 /* Connection tracking may drop packets, but never alters them, so
498 make it the first hook. */
499 static struct nf_hook_ops ip_conntrack_defrag_ops = {
500 .hook = ip_conntrack_defrag,
501 .owner = THIS_MODULE,
503 .hooknum = NF_IP_PRE_ROUTING,
504 .priority = NF_IP_PRI_CONNTRACK_DEFRAG,
507 static struct nf_hook_ops ip_conntrack_in_ops = {
508 .hook = ip_conntrack_in,
509 .owner = THIS_MODULE,
511 .hooknum = NF_IP_PRE_ROUTING,
512 .priority = NF_IP_PRI_CONNTRACK,
515 static struct nf_hook_ops ip_conntrack_defrag_local_out_ops = {
516 .hook = ip_conntrack_defrag,
517 .owner = THIS_MODULE,
519 .hooknum = NF_IP_LOCAL_OUT,
520 .priority = NF_IP_PRI_CONNTRACK_DEFRAG,
523 static struct nf_hook_ops ip_conntrack_local_out_ops = {
524 .hook = ip_conntrack_local,
525 .owner = THIS_MODULE,
527 .hooknum = NF_IP_LOCAL_OUT,
528 .priority = NF_IP_PRI_CONNTRACK,
532 static struct nf_hook_ops ip_conntrack_helper_out_ops = {
533 .hook = ip_conntrack_help,
534 .owner = THIS_MODULE,
536 .hooknum = NF_IP_POST_ROUTING,
537 .priority = NF_IP_PRI_CONNTRACK_HELPER,
540 static struct nf_hook_ops ip_conntrack_helper_in_ops = {
541 .hook = ip_conntrack_help,
542 .owner = THIS_MODULE,
544 .hooknum = NF_IP_LOCAL_IN,
545 .priority = NF_IP_PRI_CONNTRACK_HELPER,
548 /* Refragmenter; last chance. */
549 static struct nf_hook_ops ip_conntrack_out_ops = {
551 .owner = THIS_MODULE,
553 .hooknum = NF_IP_POST_ROUTING,
554 .priority = NF_IP_PRI_CONNTRACK_CONFIRM,
557 static struct nf_hook_ops ip_conntrack_local_in_ops = {
559 .owner = THIS_MODULE,
561 .hooknum = NF_IP_LOCAL_IN,
562 .priority = NF_IP_PRI_CONNTRACK_CONFIRM,
569 /* From ip_conntrack_core.c */
570 extern int ip_conntrack_max;
571 extern unsigned int ip_conntrack_htable_size;
573 /* From ip_conntrack_proto_tcp.c */
574 extern unsigned long ip_ct_tcp_timeout_syn_sent;
575 extern unsigned long ip_ct_tcp_timeout_syn_recv;
576 extern unsigned long ip_ct_tcp_timeout_established;
577 extern unsigned long ip_ct_tcp_timeout_fin_wait;
578 extern unsigned long ip_ct_tcp_timeout_close_wait;
579 extern unsigned long ip_ct_tcp_timeout_last_ack;
580 extern unsigned long ip_ct_tcp_timeout_time_wait;
581 extern unsigned long ip_ct_tcp_timeout_close;
582 extern unsigned long ip_ct_tcp_timeout_max_retrans;
583 extern int ip_ct_tcp_loose;
584 extern int ip_ct_tcp_be_liberal;
585 extern int ip_ct_tcp_max_retrans;
587 /* From ip_conntrack_proto_udp.c */
588 extern unsigned long ip_ct_udp_timeout;
589 extern unsigned long ip_ct_udp_timeout_stream;
591 /* From ip_conntrack_proto_icmp.c */
592 extern unsigned long ip_ct_icmp_timeout;
594 /* From ip_conntrack_proto_icmp.c */
595 extern unsigned long ip_ct_generic_timeout;
597 /* Log invalid packets of a given protocol */
598 static int log_invalid_proto_min = 0;
599 static int log_invalid_proto_max = 255;
601 static struct ctl_table_header *ip_ct_sysctl_header;
603 static ctl_table ip_ct_sysctl_table[] = {
605 .ctl_name = NET_IPV4_NF_CONNTRACK_MAX,
606 .procname = "ip_conntrack_max",
607 .data = &ip_conntrack_max,
608 .maxlen = sizeof(int),
610 .proc_handler = &proc_dointvec,
613 .ctl_name = NET_IPV4_NF_CONNTRACK_COUNT,
614 .procname = "ip_conntrack_count",
615 .data = &ip_conntrack_count,
616 .maxlen = sizeof(int),
618 .proc_handler = &proc_dointvec,
621 .ctl_name = NET_IPV4_NF_CONNTRACK_BUCKETS,
622 .procname = "ip_conntrack_buckets",
623 .data = &ip_conntrack_htable_size,
624 .maxlen = sizeof(unsigned int),
626 .proc_handler = &proc_dointvec,
629 .ctl_name = NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_SYN_SENT,
630 .procname = "ip_conntrack_tcp_timeout_syn_sent",
631 .data = &ip_ct_tcp_timeout_syn_sent,
632 .maxlen = sizeof(unsigned int),
634 .proc_handler = &proc_dointvec_jiffies,
637 .ctl_name = NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_SYN_RECV,
638 .procname = "ip_conntrack_tcp_timeout_syn_recv",
639 .data = &ip_ct_tcp_timeout_syn_recv,
640 .maxlen = sizeof(unsigned int),
642 .proc_handler = &proc_dointvec_jiffies,
645 .ctl_name = NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_ESTABLISHED,
646 .procname = "ip_conntrack_tcp_timeout_established",
647 .data = &ip_ct_tcp_timeout_established,
648 .maxlen = sizeof(unsigned int),
650 .proc_handler = &proc_dointvec_jiffies,
653 .ctl_name = NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_FIN_WAIT,
654 .procname = "ip_conntrack_tcp_timeout_fin_wait",
655 .data = &ip_ct_tcp_timeout_fin_wait,
656 .maxlen = sizeof(unsigned int),
658 .proc_handler = &proc_dointvec_jiffies,
661 .ctl_name = NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_CLOSE_WAIT,
662 .procname = "ip_conntrack_tcp_timeout_close_wait",
663 .data = &ip_ct_tcp_timeout_close_wait,
664 .maxlen = sizeof(unsigned int),
666 .proc_handler = &proc_dointvec_jiffies,
669 .ctl_name = NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_LAST_ACK,
670 .procname = "ip_conntrack_tcp_timeout_last_ack",
671 .data = &ip_ct_tcp_timeout_last_ack,
672 .maxlen = sizeof(unsigned int),
674 .proc_handler = &proc_dointvec_jiffies,
677 .ctl_name = NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_TIME_WAIT,
678 .procname = "ip_conntrack_tcp_timeout_time_wait",
679 .data = &ip_ct_tcp_timeout_time_wait,
680 .maxlen = sizeof(unsigned int),
682 .proc_handler = &proc_dointvec_jiffies,
685 .ctl_name = NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_CLOSE,
686 .procname = "ip_conntrack_tcp_timeout_close",
687 .data = &ip_ct_tcp_timeout_close,
688 .maxlen = sizeof(unsigned int),
690 .proc_handler = &proc_dointvec_jiffies,
693 .ctl_name = NET_IPV4_NF_CONNTRACK_UDP_TIMEOUT,
694 .procname = "ip_conntrack_udp_timeout",
695 .data = &ip_ct_udp_timeout,
696 .maxlen = sizeof(unsigned int),
698 .proc_handler = &proc_dointvec_jiffies,
701 .ctl_name = NET_IPV4_NF_CONNTRACK_UDP_TIMEOUT_STREAM,
702 .procname = "ip_conntrack_udp_timeout_stream",
703 .data = &ip_ct_udp_timeout_stream,
704 .maxlen = sizeof(unsigned int),
706 .proc_handler = &proc_dointvec_jiffies,
709 .ctl_name = NET_IPV4_NF_CONNTRACK_ICMP_TIMEOUT,
710 .procname = "ip_conntrack_icmp_timeout",
711 .data = &ip_ct_icmp_timeout,
712 .maxlen = sizeof(unsigned int),
714 .proc_handler = &proc_dointvec_jiffies,
717 .ctl_name = NET_IPV4_NF_CONNTRACK_GENERIC_TIMEOUT,
718 .procname = "ip_conntrack_generic_timeout",
719 .data = &ip_ct_generic_timeout,
720 .maxlen = sizeof(unsigned int),
722 .proc_handler = &proc_dointvec_jiffies,
725 .ctl_name = NET_IPV4_NF_CONNTRACK_LOG_INVALID,
726 .procname = "ip_conntrack_log_invalid",
727 .data = &ip_ct_log_invalid,
728 .maxlen = sizeof(unsigned int),
730 .proc_handler = &proc_dointvec_minmax,
731 .strategy = &sysctl_intvec,
732 .extra1 = &log_invalid_proto_min,
733 .extra2 = &log_invalid_proto_max,
736 .ctl_name = NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_MAX_RETRANS,
737 .procname = "ip_conntrack_tcp_timeout_max_retrans",
738 .data = &ip_ct_tcp_timeout_max_retrans,
739 .maxlen = sizeof(unsigned int),
741 .proc_handler = &proc_dointvec_jiffies,
744 .ctl_name = NET_IPV4_NF_CONNTRACK_TCP_LOOSE,
745 .procname = "ip_conntrack_tcp_loose",
746 .data = &ip_ct_tcp_loose,
747 .maxlen = sizeof(unsigned int),
749 .proc_handler = &proc_dointvec,
752 .ctl_name = NET_IPV4_NF_CONNTRACK_TCP_BE_LIBERAL,
753 .procname = "ip_conntrack_tcp_be_liberal",
754 .data = &ip_ct_tcp_be_liberal,
755 .maxlen = sizeof(unsigned int),
757 .proc_handler = &proc_dointvec,
760 .ctl_name = NET_IPV4_NF_CONNTRACK_TCP_MAX_RETRANS,
761 .procname = "ip_conntrack_tcp_max_retrans",
762 .data = &ip_ct_tcp_max_retrans,
763 .maxlen = sizeof(unsigned int),
765 .proc_handler = &proc_dointvec,
770 #define NET_IP_CONNTRACK_MAX 2089
772 static ctl_table ip_ct_netfilter_table[] = {
774 .ctl_name = NET_IPV4_NETFILTER,
775 .procname = "netfilter",
777 .child = ip_ct_sysctl_table,
780 .ctl_name = NET_IP_CONNTRACK_MAX,
781 .procname = "ip_conntrack_max",
782 .data = &ip_conntrack_max,
783 .maxlen = sizeof(int),
785 .proc_handler = &proc_dointvec
790 static ctl_table ip_ct_ipv4_table[] = {
792 .ctl_name = NET_IPV4,
795 .child = ip_ct_netfilter_table,
800 static ctl_table ip_ct_net_table[] = {
805 .child = ip_ct_ipv4_table,
810 EXPORT_SYMBOL(ip_ct_log_invalid);
811 #endif /* CONFIG_SYSCTL */
813 static int init_or_cleanup(int init)
815 #ifdef CONFIG_PROC_FS
816 struct proc_dir_entry *proc, *proc_exp, *proc_stat;
820 if (!init) goto cleanup;
822 ret = ip_conntrack_init();
824 goto cleanup_nothing;
826 #ifdef CONFIG_PROC_FS
828 proc = proc_net_fops_create("ip_conntrack", 0440, &ct_file_ops);
829 if (!proc) goto cleanup_init;
831 proc_exp = proc_net_fops_create("ip_conntrack_expect", 0440,
833 if (!proc_exp) goto cleanup_proc;
835 proc_stat = create_proc_entry("ip_conntrack", S_IRUGO, proc_net_stat);
837 goto cleanup_proc_exp;
839 proc_stat->proc_fops = &ct_cpu_seq_fops;
840 proc_stat->owner = THIS_MODULE;
843 ret = nf_register_hook(&ip_conntrack_defrag_ops);
845 printk("ip_conntrack: can't register pre-routing defrag hook.\n");
846 goto cleanup_proc_stat;
848 ret = nf_register_hook(&ip_conntrack_defrag_local_out_ops);
850 printk("ip_conntrack: can't register local_out defrag hook.\n");
851 goto cleanup_defragops;
853 ret = nf_register_hook(&ip_conntrack_in_ops);
855 printk("ip_conntrack: can't register pre-routing hook.\n");
856 goto cleanup_defraglocalops;
858 ret = nf_register_hook(&ip_conntrack_local_out_ops);
860 printk("ip_conntrack: can't register local out hook.\n");
863 ret = nf_register_hook(&ip_conntrack_helper_in_ops);
865 printk("ip_conntrack: can't register local in helper hook.\n");
866 goto cleanup_inandlocalops;
868 ret = nf_register_hook(&ip_conntrack_helper_out_ops);
870 printk("ip_conntrack: can't register postrouting helper hook.\n");
871 goto cleanup_helperinops;
873 ret = nf_register_hook(&ip_conntrack_out_ops);
875 printk("ip_conntrack: can't register post-routing hook.\n");
876 goto cleanup_helperoutops;
878 ret = nf_register_hook(&ip_conntrack_local_in_ops);
880 printk("ip_conntrack: can't register local in hook.\n");
881 goto cleanup_inoutandlocalops;
884 ip_ct_sysctl_header = register_sysctl_table(ip_ct_net_table, 0);
885 if (ip_ct_sysctl_header == NULL) {
886 printk("ip_conntrack: can't register to sysctl.\n");
888 goto cleanup_localinops;
896 unregister_sysctl_table(ip_ct_sysctl_header);
899 nf_unregister_hook(&ip_conntrack_local_in_ops);
900 cleanup_inoutandlocalops:
901 nf_unregister_hook(&ip_conntrack_out_ops);
902 cleanup_helperoutops:
903 nf_unregister_hook(&ip_conntrack_helper_out_ops);
905 nf_unregister_hook(&ip_conntrack_helper_in_ops);
906 cleanup_inandlocalops:
907 nf_unregister_hook(&ip_conntrack_local_out_ops);
909 nf_unregister_hook(&ip_conntrack_in_ops);
910 cleanup_defraglocalops:
911 nf_unregister_hook(&ip_conntrack_defrag_local_out_ops);
913 nf_unregister_hook(&ip_conntrack_defrag_ops);
915 #ifdef CONFIG_PROC_FS
916 remove_proc_entry("ip_conntrack", proc_net_stat);
918 proc_net_remove("ip_conntrack_expect");
920 proc_net_remove("ip_conntrack");
922 #endif /* CONFIG_PROC_FS */
923 ip_conntrack_cleanup();
928 /* FIXME: Allow NULL functions and sub in pointers to generic for
930 int ip_conntrack_protocol_register(struct ip_conntrack_protocol *proto)
934 WRITE_LOCK(&ip_conntrack_lock);
935 if (ip_ct_protos[proto->proto] != &ip_conntrack_generic_protocol) {
939 ip_ct_protos[proto->proto] = proto;
941 WRITE_UNLOCK(&ip_conntrack_lock);
945 void ip_conntrack_protocol_unregister(struct ip_conntrack_protocol *proto)
947 WRITE_LOCK(&ip_conntrack_lock);
948 ip_ct_protos[proto->proto] = &ip_conntrack_generic_protocol;
949 WRITE_UNLOCK(&ip_conntrack_lock);
951 /* Somebody could be still looking at the proto in bh. */
954 /* Remove all contrack entries for this protocol */
955 ip_ct_iterate_cleanup(kill_proto, &proto->proto);
958 static int __init init(void)
960 return init_or_cleanup(1);
963 static void __exit fini(void)
971 /* Some modules need us, but don't depend directly on any symbol.
972 They should call this. */
973 void need_ip_conntrack(void)
977 EXPORT_SYMBOL(ip_conntrack_protocol_register);
978 EXPORT_SYMBOL(ip_conntrack_protocol_unregister);
979 EXPORT_SYMBOL(ip_ct_get_tuple);
980 EXPORT_SYMBOL(invert_tuplepr);
981 EXPORT_SYMBOL(ip_conntrack_alter_reply);
982 EXPORT_SYMBOL(ip_conntrack_destroyed);
983 EXPORT_SYMBOL(need_ip_conntrack);
984 EXPORT_SYMBOL(ip_conntrack_helper_register);
985 EXPORT_SYMBOL(ip_conntrack_helper_unregister);
986 EXPORT_SYMBOL(ip_ct_iterate_cleanup);
987 EXPORT_SYMBOL(ip_ct_refresh_acct);
988 EXPORT_SYMBOL(ip_ct_protos);
989 EXPORT_SYMBOL(ip_ct_find_proto);
990 EXPORT_SYMBOL(ip_conntrack_expect_alloc);
991 EXPORT_SYMBOL(ip_conntrack_expect_free);
992 EXPORT_SYMBOL(ip_conntrack_expect_related);
993 EXPORT_SYMBOL(ip_conntrack_unexpect_related);
994 EXPORT_SYMBOL(ip_conntrack_tuple_taken);
995 EXPORT_SYMBOL(ip_ct_gather_frags);
996 EXPORT_SYMBOL(ip_conntrack_htable_size);
997 EXPORT_SYMBOL(ip_conntrack_lock);
998 EXPORT_SYMBOL(ip_conntrack_hash);
999 EXPORT_SYMBOL(ip_conntrack_untracked);
1000 EXPORT_SYMBOL_GPL(ip_conntrack_find_get);
1001 EXPORT_SYMBOL_GPL(__ip_conntrack_find);
1002 EXPORT_SYMBOL_GPL(__ip_conntrack_exp_find);
1003 EXPORT_SYMBOL_GPL(ip_conntrack_put);
1004 #ifdef CONFIG_IP_NF_NAT_NEEDED
1005 EXPORT_SYMBOL(ip_conntrack_tcp_update);