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[NETFILTER]: Fix section mismatch warnings
[mirror_ubuntu-bionic-kernel.git] / net / ipv4 / netfilter / ip_conntrack_standalone.c
CommitLineData
1da177e4
LT		 1/* This file contains all the functions required for the standalone
2 ip_conntrack module.
3
4 These are not required by the compatibility layer.
5*/
6
7/* (C) 1999-2001 Paul `Rusty' Russell
080774a2 8 * (C) 2002-2005 Netfilter Core Team <coreteam@netfilter.org>
1da177e4
LT		 9 *
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.
13 */
14
15#include <linux/config.h>
16#include <linux/types.h>
17#include <linux/ip.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>
25#ifdef CONFIG_SYSCTL
26#include <linux/sysctl.h>
27#endif
28#include <net/checksum.h>
29#include <net/ip.h>
14c85021 30#include <net/route.h>
1da177e4 31
e45b1be8
PM		 32#define ASSERT_READ_LOCK(x)
33#define ASSERT_WRITE_LOCK(x)
1da177e4
LT		 34
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>
40
41#if 0
42#define DEBUGP printk
43#else
44#define DEBUGP(format, args...)
45#endif
46
47MODULE_LICENSE("GPL");
48
49extern atomic_t ip_conntrack_count;
50DECLARE_PER_CPU(struct ip_conntrack_stat, ip_conntrack_stat);
51
52static int kill_proto(struct ip_conntrack *i, void *data)
53{
54 return (i->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.protonum ==
55 *((u_int8_t *) data));
56}
57
58#ifdef CONFIG_PROC_FS
59static int
60print_tuple(struct seq_file *s, const struct ip_conntrack_tuple *tuple,
61 struct ip_conntrack_protocol *proto)
62{
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);
66}
67
68#ifdef CONFIG_IP_NF_CT_ACCT
69static unsigned int
70seq_print_counters(struct seq_file *s,
71 const struct ip_conntrack_counter *counter)
72{
73 return seq_printf(s, "packets=%llu bytes=%llu ",
74 (unsigned long long)counter->packets,
75 (unsigned long long)counter->bytes);
76}
77#else
78#define seq_print_counters(x, y) 0
79#endif
80
81struct ct_iter_state {
82 unsigned int bucket;
83};
84
85static struct list_head *ct_get_first(struct seq_file *seq)
86{
87 struct ct_iter_state *st = seq->private;
88
89 for (st->bucket = 0;
90 st->bucket < ip_conntrack_htable_size;
91 st->bucket++) {
92 if (!list_empty(&ip_conntrack_hash[st->bucket]))
93 return ip_conntrack_hash[st->bucket].next;
94 }
95 return NULL;
96}
97
98static struct list_head *ct_get_next(struct seq_file *seq, struct list_head *head)
99{
100 struct ct_iter_state *st = seq->private;
101
102 head = head->next;
103 while (head == &ip_conntrack_hash[st->bucket]) {
104 if (++st->bucket >= ip_conntrack_htable_size)
105 return NULL;
106 head = ip_conntrack_hash[st->bucket].next;
107 }
108 return head;
109}
110
111static struct list_head *ct_get_idx(struct seq_file *seq, loff_t pos)
112{
113 struct list_head *head = ct_get_first(seq);
114
115 if (head)
116 while (pos && (head = ct_get_next(seq, head)))
117 pos--;
118 return pos ? NULL : head;
119}
120
121static void *ct_seq_start(struct seq_file *seq, loff_t *pos)
122{
e45b1be8 123 read_lock_bh(&ip_conntrack_lock);
1da177e4
LT		 124 return ct_get_idx(seq, *pos);
125}
126
127static void *ct_seq_next(struct seq_file *s, void *v, loff_t *pos)
128{
129 (*pos)++;
130 return ct_get_next(s, v);
131}
132
133static void ct_seq_stop(struct seq_file *s, void *v)
134{
e45b1be8 135 read_unlock_bh(&ip_conntrack_lock);
1da177e4
LT		 136}
137
138static int ct_seq_show(struct seq_file *s, void *v)
139{
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;
143
e45b1be8 144 ASSERT_READ_LOCK(&ip_conntrack_lock);
1da177e4
LT		 145 IP_NF_ASSERT(conntrack);
146
147 /* we only want to print DIR_ORIGINAL */
148 if (DIRECTION(hash))
149 return 0;
150
080774a2 151 proto = __ip_conntrack_proto_find(conntrack->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.protonum);
1da177e4
LT		 152 IP_NF_ASSERT(proto);
153
154 if (seq_printf(s, "%-8s %u %ld ",
155 proto->name,
156 conntrack->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.protonum,
157 timer_pending(&conntrack->timeout)
158 ? (long)(conntrack->timeout.expires - jiffies)/HZ
159 : 0) != 0)
160 return -ENOSPC;
161
162 if (proto->print_conntrack(s, conntrack))
163 return -ENOSPC;
164
165 if (print_tuple(s, &conntrack->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
166 proto))
167 return -ENOSPC;
168
169 if (seq_print_counters(s, &conntrack->counters[IP_CT_DIR_ORIGINAL]))
170 return -ENOSPC;
171
172 if (!(test_bit(IPS_SEEN_REPLY_BIT, &conntrack->status)))
173 if (seq_printf(s, "[UNREPLIED] "))
174 return -ENOSPC;
175
176 if (print_tuple(s, &conntrack->tuplehash[IP_CT_DIR_REPLY].tuple,
177 proto))
178 return -ENOSPC;
179
180 if (seq_print_counters(s, &conntrack->counters[IP_CT_DIR_REPLY]))
181 return -ENOSPC;
182
183 if (test_bit(IPS_ASSURED_BIT, &conntrack->status))
184 if (seq_printf(s, "[ASSURED] "))
185 return -ENOSPC;
186
187#if defined(CONFIG_IP_NF_CONNTRACK_MARK)
bf3a46aa 188 if (seq_printf(s, "mark=%u ", conntrack->mark))
1da177e4
LT		 189 return -ENOSPC;
190#endif
191
192 if (seq_printf(s, "use=%u\n", atomic_read(&conntrack->ct_general.use)))
193 return -ENOSPC;
194
195 return 0;
196}
197
198static struct seq_operations ct_seq_ops = {
199 .start = ct_seq_start,
200 .next = ct_seq_next,
201 .stop = ct_seq_stop,
202 .show = ct_seq_show
203};
204
205static int ct_open(struct inode *inode, struct file *file)
206{
207 struct seq_file *seq;
208 struct ct_iter_state *st;
209 int ret;
210
211 st = kmalloc(sizeof(struct ct_iter_state), GFP_KERNEL);
212 if (st == NULL)
213 return -ENOMEM;
214 ret = seq_open(file, &ct_seq_ops);
215 if (ret)
216 goto out_free;
217 seq = file->private_data;
218 seq->private = st;
219 memset(st, 0, sizeof(struct ct_iter_state));
220 return ret;
221out_free:
222 kfree(st);
223 return ret;
224}
225
226static struct file_operations ct_file_ops = {
227 .owner = THIS_MODULE,
228 .open = ct_open,
229 .read = seq_read,
230 .llseek = seq_lseek,
231 .release = seq_release_private,
232};
233
234/* expects */
235static void *exp_seq_start(struct seq_file *s, loff_t *pos)
236{
237 struct list_head *e = &ip_conntrack_expect_list;
238 loff_t i;
239
240 /* strange seq_file api calls stop even if we fail,
241 * thus we need to grab lock since stop unlocks */
e45b1be8 242 read_lock_bh(&ip_conntrack_lock);
1da177e4
LT		 243
244 if (list_empty(e))
245 return NULL;
246
247 for (i = 0; i <= *pos; i++) {
248 e = e->next;
249 if (e == &ip_conntrack_expect_list)
250 return NULL;
251 }
252 return e;
253}
254
255static void *exp_seq_next(struct seq_file *s, void *v, loff_t *pos)
256{
257 struct list_head *e = v;
258
a96aca88 259 ++*pos;
1da177e4
LT		 260 e = e->next;
261
262 if (e == &ip_conntrack_expect_list)
263 return NULL;
264
265 return e;
266}
267
268static void exp_seq_stop(struct seq_file *s, void *v)
269{
e45b1be8 270 read_unlock_bh(&ip_conntrack_lock);
1da177e4
LT		 271}
272
273static int exp_seq_show(struct seq_file *s, void *v)
274{
275 struct ip_conntrack_expect *expect = v;
276
277 if (expect->timeout.function)
278 seq_printf(s, "%ld ", timer_pending(&expect->timeout)
279 ? (long)(expect->timeout.expires - jiffies)/HZ : 0);
280 else
281 seq_printf(s, "- ");
282
283 seq_printf(s, "proto=%u ", expect->tuple.dst.protonum);
284
285 print_tuple(s, &expect->tuple,
080774a2 286 __ip_conntrack_proto_find(expect->tuple.dst.protonum));
1da177e4
LT		 287 return seq_putc(s, '\n');
288}
289
290static struct seq_operations exp_seq_ops = {
291 .start = exp_seq_start,
292 .next = exp_seq_next,
293 .stop = exp_seq_stop,
294 .show = exp_seq_show
295};
296
297static int exp_open(struct inode *inode, struct file *file)
298{
299 return seq_open(file, &exp_seq_ops);
300}
301
302static struct file_operations exp_file_ops = {
303 .owner = THIS_MODULE,
304 .open = exp_open,
305 .read = seq_read,
306 .llseek = seq_lseek,
307 .release = seq_release
308};
309
310static void *ct_cpu_seq_start(struct seq_file *seq, loff_t *pos)
311{
312 int cpu;
313
314 if (*pos == 0)
315 return SEQ_START_TOKEN;
316
317 for (cpu = *pos-1; cpu < NR_CPUS; ++cpu) {
318 if (!cpu_possible(cpu))
319 continue;
320 *pos = cpu+1;
321 return &per_cpu(ip_conntrack_stat, cpu);
322 }
323
324 return NULL;
325}
326
327static void *ct_cpu_seq_next(struct seq_file *seq, void *v, loff_t *pos)
328{
329 int cpu;
330
331 for (cpu = *pos; cpu < NR_CPUS; ++cpu) {
332 if (!cpu_possible(cpu))
333 continue;
334 *pos = cpu+1;
335 return &per_cpu(ip_conntrack_stat, cpu);
336 }
337
338 return NULL;
339}
340
341static void ct_cpu_seq_stop(struct seq_file *seq, void *v)
342{
343}
344
345static int ct_cpu_seq_show(struct seq_file *seq, void *v)
346{
347 unsigned int nr_conntracks = atomic_read(&ip_conntrack_count);
348 struct ip_conntrack_stat *st = v;
349
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");
352 return 0;
353 }
354
355 seq_printf(seq, "%08x %08x %08x %08x %08x %08x %08x %08x "
356 "%08x %08x %08x %08x %08x %08x %08x %08x \n",
357 nr_conntracks,
358 st->searched,
359 st->found,
360 st->new,
361 st->invalid,
362 st->ignore,
363 st->delete,
364 st->delete_list,
365 st->insert,
366 st->insert_failed,
367 st->drop,
368 st->early_drop,
369 st->error,
370
371 st->expect_new,
372 st->expect_create,
373 st->expect_delete
374 );
375 return 0;
376}
377
378static 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,
383};
384
385static int ct_cpu_seq_open(struct inode *inode, struct file *file)
386{
387 return seq_open(file, &ct_cpu_seq_ops);
388}
389
390static struct file_operations ct_cpu_seq_fops = {
391 .owner = THIS_MODULE,
392 .open = ct_cpu_seq_open,
393 .read = seq_read,
394 .llseek = seq_lseek,
395 .release = seq_release_private,
396};
397#endif
398
399static 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 *))
e281e3ac
PM		 404{
405 /* We've seen it coming out the other side: confirm it */
406 return ip_conntrack_confirm(pskb);
407}
408
409static 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 *))
1da177e4
LT		 414{
415 struct ip_conntrack *ct;
416 enum ip_conntrack_info ctinfo;
417
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) {
421 unsigned int ret;
422 ret = ct->helper->help(pskb, ct, ctinfo);
423 if (ret != NF_ACCEPT)
424 return ret;
425 }
e281e3ac 426 return NF_ACCEPT;
1da177e4
LT		 427}
428
429static 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 *))
434{
84531c24
PO		 435#if !defined(CONFIG_IP_NF_NAT) && !defined(CONFIG_IP_NF_NAT_MODULE)
436 /* Previously seen (loopback)? Ignore. Do this before
437 fragment check. */
438 if ((*pskb)->nfct)
439 return NF_ACCEPT;
440#endif
441
1da177e4
LT		 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);
448 if (!*pskb)
449 return NF_STOLEN;
450 }
451 return NF_ACCEPT;
452}
453
1da177e4
LT		 454static 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 *))
459{
460 /* root is playing with raw sockets. */
461 if ((*pskb)->len < sizeof(struct iphdr)
462 || (*pskb)->nh.iph->ihl * 4 < sizeof(struct iphdr)) {
463 if (net_ratelimit())
464 printk("ipt_hook: happy cracking.\n");
465 return NF_ACCEPT;
466 }
467 return ip_conntrack_in(hooknum, pskb, in, out, okfn);
468}
469
470/* Connection tracking may drop packets, but never alters them, so
471 make it the first hook. */
964ddaa1
PM		 472static struct nf_hook_ops ip_conntrack_ops[] = {
473 {
474 .hook = ip_conntrack_defrag,
475 .owner = THIS_MODULE,
476 .pf = PF_INET,
477 .hooknum = NF_IP_PRE_ROUTING,
478 .priority = NF_IP_PRI_CONNTRACK_DEFRAG,
479 },
480 {
481 .hook = ip_conntrack_in,
482 .owner = THIS_MODULE,
483 .pf = PF_INET,
484 .hooknum = NF_IP_PRE_ROUTING,
485 .priority = NF_IP_PRI_CONNTRACK,
486 },
487 {
488 .hook = ip_conntrack_defrag,
489 .owner = THIS_MODULE,
490 .pf = PF_INET,
491 .hooknum = NF_IP_LOCAL_OUT,
492 .priority = NF_IP_PRI_CONNTRACK_DEFRAG,
493 },
494 {
495 .hook = ip_conntrack_local,
496 .owner = THIS_MODULE,
497 .pf = PF_INET,
498 .hooknum = NF_IP_LOCAL_OUT,
499 .priority = NF_IP_PRI_CONNTRACK,
500 },
501 {
502 .hook = ip_conntrack_help,
503 .owner = THIS_MODULE,
504 .pf = PF_INET,
505 .hooknum = NF_IP_POST_ROUTING,
506 .priority = NF_IP_PRI_CONNTRACK_HELPER,
507 },
508 {
509 .hook = ip_conntrack_help,
510 .owner = THIS_MODULE,
511 .pf = PF_INET,
512 .hooknum = NF_IP_LOCAL_IN,
513 .priority = NF_IP_PRI_CONNTRACK_HELPER,
514 },
515 {
516 .hook = ip_confirm,
517 .owner = THIS_MODULE,
518 .pf = PF_INET,
519 .hooknum = NF_IP_POST_ROUTING,
520 .priority = NF_IP_PRI_CONNTRACK_CONFIRM,
521 },
522 {
523 .hook = ip_confirm,
524 .owner = THIS_MODULE,
525 .pf = PF_INET,
526 .hooknum = NF_IP_LOCAL_IN,
527 .priority = NF_IP_PRI_CONNTRACK_CONFIRM,
528 },
1da177e4
LT		 529};
530
531/* Sysctl support */
532
533#ifdef CONFIG_SYSCTL
534
535/* From ip_conntrack_core.c */
536extern int ip_conntrack_max;
537extern unsigned int ip_conntrack_htable_size;
538
539/* From ip_conntrack_proto_tcp.c */
babbdb1a
PM		 540extern unsigned int ip_ct_tcp_timeout_syn_sent;
541extern unsigned int ip_ct_tcp_timeout_syn_recv;
542extern unsigned int ip_ct_tcp_timeout_established;
543extern unsigned int ip_ct_tcp_timeout_fin_wait;
544extern unsigned int ip_ct_tcp_timeout_close_wait;
545extern unsigned int ip_ct_tcp_timeout_last_ack;
546extern unsigned int ip_ct_tcp_timeout_time_wait;
547extern unsigned int ip_ct_tcp_timeout_close;
548extern unsigned int ip_ct_tcp_timeout_max_retrans;
1da177e4
LT		 549extern int ip_ct_tcp_loose;
550extern int ip_ct_tcp_be_liberal;
551extern int ip_ct_tcp_max_retrans;
552
553/* From ip_conntrack_proto_udp.c */
babbdb1a
PM		 554extern unsigned int ip_ct_udp_timeout;
555extern unsigned int ip_ct_udp_timeout_stream;
1da177e4
LT		 556
557/* From ip_conntrack_proto_icmp.c */
babbdb1a 558extern unsigned int ip_ct_icmp_timeout;
1da177e4
LT		 559
560/* From ip_conntrack_proto_icmp.c */
babbdb1a 561extern unsigned int ip_ct_generic_timeout;
1da177e4
LT		 562
563/* Log invalid packets of a given protocol */
564static int log_invalid_proto_min = 0;
565static int log_invalid_proto_max = 255;
566
567static struct ctl_table_header *ip_ct_sysctl_header;
568
569static ctl_table ip_ct_sysctl_table[] = {
570 {
571 .ctl_name = NET_IPV4_NF_CONNTRACK_MAX,
572 .procname = "ip_conntrack_max",
573 .data = &ip_conntrack_max,
574 .maxlen = sizeof(int),
575 .mode = 0644,
576 .proc_handler = &proc_dointvec,
577 },
578 {
579 .ctl_name = NET_IPV4_NF_CONNTRACK_COUNT,
580 .procname = "ip_conntrack_count",
581 .data = &ip_conntrack_count,
582 .maxlen = sizeof(int),
583 .mode = 0444,
584 .proc_handler = &proc_dointvec,
585 },
586 {
587 .ctl_name = NET_IPV4_NF_CONNTRACK_BUCKETS,
588 .procname = "ip_conntrack_buckets",
589 .data = &ip_conntrack_htable_size,
590 .maxlen = sizeof(unsigned int),
591 .mode = 0444,
592 .proc_handler = &proc_dointvec,
593 },
594 {
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),
599 .mode = 0644,
600 .proc_handler = &proc_dointvec_jiffies,
601 },
602 {
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),
607 .mode = 0644,
608 .proc_handler = &proc_dointvec_jiffies,
609 },
610 {
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),
615 .mode = 0644,
616 .proc_handler = &proc_dointvec_jiffies,
617 },
618 {
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),
623 .mode = 0644,
624 .proc_handler = &proc_dointvec_jiffies,
625 },
626 {
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),
631 .mode = 0644,
632 .proc_handler = &proc_dointvec_jiffies,
633 },
634 {
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),
639 .mode = 0644,
640 .proc_handler = &proc_dointvec_jiffies,
641 },
642 {
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),
647 .mode = 0644,
648 .proc_handler = &proc_dointvec_jiffies,
649 },
650 {
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),
655 .mode = 0644,
656 .proc_handler = &proc_dointvec_jiffies,
657 },
658 {
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),
663 .mode = 0644,
664 .proc_handler = &proc_dointvec_jiffies,
665 },
666 {
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),
671 .mode = 0644,
672 .proc_handler = &proc_dointvec_jiffies,
673 },
674 {
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),
679 .mode = 0644,
680 .proc_handler = &proc_dointvec_jiffies,
681 },
682 {
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),
687 .mode = 0644,
688 .proc_handler = &proc_dointvec_jiffies,
689 },
690 {
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),
695 .mode = 0644,
696 .proc_handler = &proc_dointvec_minmax,
697 .strategy = &sysctl_intvec,
698 .extra1 = &log_invalid_proto_min,
699 .extra2 = &log_invalid_proto_max,
700 },
701 {
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),
706 .mode = 0644,
707 .proc_handler = &proc_dointvec_jiffies,
708 },
709 {
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),
714 .mode = 0644,
715 .proc_handler = &proc_dointvec,
716 },
717 {
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),
722 .mode = 0644,
723 .proc_handler = &proc_dointvec,
724 },
725 {
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),
730 .mode = 0644,
731 .proc_handler = &proc_dointvec,
732 },
733 { .ctl_name = 0 }
734};
735
736#define NET_IP_CONNTRACK_MAX 2089
737
738static ctl_table ip_ct_netfilter_table[] = {
739 {
740 .ctl_name = NET_IPV4_NETFILTER,
741 .procname = "netfilter",
742 .mode = 0555,
743 .child = ip_ct_sysctl_table,
744 },
745 {
746 .ctl_name = NET_IP_CONNTRACK_MAX,
747 .procname = "ip_conntrack_max",
748 .data = &ip_conntrack_max,
749 .maxlen = sizeof(int),
750 .mode = 0644,
751 .proc_handler = &proc_dointvec
752 },
753 { .ctl_name = 0 }
754};
755
756static ctl_table ip_ct_ipv4_table[] = {
757 {
758 .ctl_name = NET_IPV4,
759 .procname = "ipv4",
760 .mode = 0555,
761 .child = ip_ct_netfilter_table,
762 },
763 { .ctl_name = 0 }
764};
765
766static ctl_table ip_ct_net_table[] = {
767 {
768 .ctl_name = CTL_NET,
769 .procname = "net",
770 .mode = 0555,
771 .child = ip_ct_ipv4_table,
772 },
773 { .ctl_name = 0 }
774};
775
776EXPORT_SYMBOL(ip_ct_log_invalid);
777#endif /* CONFIG_SYSCTL */
778
32292a7f
PM		 779/* FIXME: Allow NULL functions and sub in pointers to generic for
780 them. --RR */
781int ip_conntrack_protocol_register(struct ip_conntrack_protocol *proto)
782{
783 int ret = 0;
784
785 write_lock_bh(&ip_conntrack_lock);
786 if (ip_ct_protos[proto->proto] != &ip_conntrack_generic_protocol) {
787 ret = -EBUSY;
788 goto out;
789 }
790 ip_ct_protos[proto->proto] = proto;
791 out:
792 write_unlock_bh(&ip_conntrack_lock);
793 return ret;
794}
795
796void ip_conntrack_protocol_unregister(struct ip_conntrack_protocol *proto)
797{
798 write_lock_bh(&ip_conntrack_lock);
799 ip_ct_protos[proto->proto] = &ip_conntrack_generic_protocol;
800 write_unlock_bh(&ip_conntrack_lock);
801
802 /* Somebody could be still looking at the proto in bh. */
803 synchronize_net();
804
805 /* Remove all contrack entries for this protocol */
806 ip_ct_iterate_cleanup(kill_proto, &proto->proto);
807}
808
809static int __init ip_conntrack_standalone_init(void)
1da177e4
LT		 810{
811#ifdef CONFIG_PROC_FS
812 struct proc_dir_entry *proc, *proc_exp, *proc_stat;
813#endif
814 int ret = 0;
815
1da177e4
LT		 816 ret = ip_conntrack_init();
817 if (ret < 0)
32292a7f 818 return ret;
1da177e4
LT		 819
820#ifdef CONFIG_PROC_FS
821 ret = -ENOMEM;
822 proc = proc_net_fops_create("ip_conntrack", 0440, &ct_file_ops);
823 if (!proc) goto cleanup_init;
824
825 proc_exp = proc_net_fops_create("ip_conntrack_expect", 0440,
826 &exp_file_ops);
827 if (!proc_exp) goto cleanup_proc;
828
829 proc_stat = create_proc_entry("ip_conntrack", S_IRUGO, proc_net_stat);
830 if (!proc_stat)
831 goto cleanup_proc_exp;
832
833 proc_stat->proc_fops = &ct_cpu_seq_fops;
834 proc_stat->owner = THIS_MODULE;
835#endif
836
964ddaa1 837 ret = nf_register_hooks(ip_conntrack_ops, ARRAY_SIZE(ip_conntrack_ops));
1da177e4 838 if (ret < 0) {
964ddaa1 839 printk("ip_conntrack: can't register hooks.\n");
1da177e4
LT		 840 goto cleanup_proc_stat;
841 }
1da177e4
LT		 842#ifdef CONFIG_SYSCTL
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");
846 ret = -ENOMEM;
964ddaa1 847 goto cleanup_hooks;
1da177e4
LT		 848 }
849#endif
1da177e4
LT		 850 return ret;
851
1da177e4 852#ifdef CONFIG_SYSCTL
964ddaa1 853 cleanup_hooks:
964ddaa1 854 nf_unregister_hooks(ip_conntrack_ops, ARRAY_SIZE(ip_conntrack_ops));
32292a7f 855#endif
1da177e4
LT		 856 cleanup_proc_stat:
857#ifdef CONFIG_PROC_FS
858 remove_proc_entry("ip_conntrack", proc_net_stat);
859 cleanup_proc_exp:
860 proc_net_remove("ip_conntrack_expect");
861 cleanup_proc:
862 proc_net_remove("ip_conntrack");
863 cleanup_init:
864#endif /* CONFIG_PROC_FS */
865 ip_conntrack_cleanup();
1da177e4
LT		 866 return ret;
867}
868
65b4b4e8 869static void __exit ip_conntrack_standalone_fini(void)
1da177e4 870{
32292a7f
PM		 871 synchronize_net();
872#ifdef CONFIG_SYSCTL
873 unregister_sysctl_table(ip_ct_sysctl_header);
874#endif
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();
1da177e4
LT		 882}
883
65b4b4e8
AM		 884module_init(ip_conntrack_standalone_init);
885module_exit(ip_conntrack_standalone_fini);
1da177e4
LT		 886
887/* Some modules need us, but don't depend directly on any symbol.
888 They should call this. */
2e4e6a17 889void need_conntrack(void)
1da177e4
LT		 890{
891}
892
ac3247ba
HW		 893#ifdef CONFIG_IP_NF_CONNTRACK_EVENTS
894EXPORT_SYMBOL_GPL(ip_conntrack_chain);
895EXPORT_SYMBOL_GPL(ip_conntrack_expect_chain);
896EXPORT_SYMBOL_GPL(ip_conntrack_register_notifier);
897EXPORT_SYMBOL_GPL(ip_conntrack_unregister_notifier);
a86888b9 898EXPORT_SYMBOL_GPL(__ip_ct_event_cache_init);
ac3247ba
HW		 899EXPORT_PER_CPU_SYMBOL_GPL(ip_conntrack_ecache);
900#endif
1da177e4
LT		 901EXPORT_SYMBOL(ip_conntrack_protocol_register);
902EXPORT_SYMBOL(ip_conntrack_protocol_unregister);
903EXPORT_SYMBOL(ip_ct_get_tuple);
904EXPORT_SYMBOL(invert_tuplepr);
905EXPORT_SYMBOL(ip_conntrack_alter_reply);
906EXPORT_SYMBOL(ip_conntrack_destroyed);
2e4e6a17 907EXPORT_SYMBOL(need_conntrack);
1da177e4
LT		 908EXPORT_SYMBOL(ip_conntrack_helper_register);
909EXPORT_SYMBOL(ip_conntrack_helper_unregister);
910EXPORT_SYMBOL(ip_ct_iterate_cleanup);
1dfbab59 911EXPORT_SYMBOL(__ip_ct_refresh_acct);
080774a2 912
1da177e4 913EXPORT_SYMBOL(ip_conntrack_expect_alloc);
4acdbdbe 914EXPORT_SYMBOL(ip_conntrack_expect_put);
a41bc002
PM		 915EXPORT_SYMBOL_GPL(__ip_conntrack_expect_find);
916EXPORT_SYMBOL_GPL(ip_conntrack_expect_find);
1da177e4
LT		 917EXPORT_SYMBOL(ip_conntrack_expect_related);
918EXPORT_SYMBOL(ip_conntrack_unexpect_related);
080774a2 919EXPORT_SYMBOL_GPL(ip_conntrack_expect_list);
49719eb3 920EXPORT_SYMBOL_GPL(ip_ct_unlink_expect);
080774a2 921
1da177e4
LT		 922EXPORT_SYMBOL(ip_conntrack_tuple_taken);
923EXPORT_SYMBOL(ip_ct_gather_frags);
924EXPORT_SYMBOL(ip_conntrack_htable_size);
925EXPORT_SYMBOL(ip_conntrack_lock);
926EXPORT_SYMBOL(ip_conntrack_hash);
927EXPORT_SYMBOL(ip_conntrack_untracked);
928EXPORT_SYMBOL_GPL(ip_conntrack_find_get);
1da177e4
LT		 929#ifdef CONFIG_IP_NF_NAT_NEEDED
930EXPORT_SYMBOL(ip_conntrack_tcp_update);
931#endif
080774a2
HW		 932
933EXPORT_SYMBOL_GPL(ip_conntrack_flush);
934EXPORT_SYMBOL_GPL(__ip_conntrack_find);
935
936EXPORT_SYMBOL_GPL(ip_conntrack_alloc);
937EXPORT_SYMBOL_GPL(ip_conntrack_free);
938EXPORT_SYMBOL_GPL(ip_conntrack_hash_insert);
939
940EXPORT_SYMBOL_GPL(ip_ct_remove_expectations);
941
942EXPORT_SYMBOL_GPL(ip_conntrack_helper_find_get);
943EXPORT_SYMBOL_GPL(ip_conntrack_helper_put);
944EXPORT_SYMBOL_GPL(__ip_conntrack_helper_find_byname);
945
946EXPORT_SYMBOL_GPL(ip_conntrack_proto_find_get);
947EXPORT_SYMBOL_GPL(ip_conntrack_proto_put);
948EXPORT_SYMBOL_GPL(__ip_conntrack_proto_find);
949#if defined(CONFIG_IP_NF_CONNTRACK_NETLINK) || \
950 defined(CONFIG_IP_NF_CONNTRACK_NETLINK_MODULE)
951EXPORT_SYMBOL_GPL(ip_ct_port_tuple_to_nfattr);
952EXPORT_SYMBOL_GPL(ip_ct_port_nfattr_to_tuple);
953#endif
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