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Linux-2.6.12-rc2
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / ipv4 / netfilter / ip_conntrack_standalone.c
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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
8 * (C) 2002-2004 Netfilter Core Team <coreteam@netfilter.org>
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>
30
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)
33
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>
39
40#if 0
41#define DEBUGP printk
42#else
43#define DEBUGP(format, args...)
44#endif
45
46MODULE_LICENSE("GPL");
47
48extern atomic_t ip_conntrack_count;
49DECLARE_PER_CPU(struct ip_conntrack_stat, ip_conntrack_stat);
50
51static int kill_proto(struct ip_conntrack *i, void *data)
52{
53 return (i->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.protonum ==
54 *((u_int8_t *) data));
55}
56
57#ifdef CONFIG_PROC_FS
58static int
59print_tuple(struct seq_file *s, const struct ip_conntrack_tuple *tuple,
60 struct ip_conntrack_protocol *proto)
61{
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);
65}
66
67#ifdef CONFIG_IP_NF_CT_ACCT
68static unsigned int
69seq_print_counters(struct seq_file *s,
70 const struct ip_conntrack_counter *counter)
71{
72 return seq_printf(s, "packets=%llu bytes=%llu ",
73 (unsigned long long)counter->packets,
74 (unsigned long long)counter->bytes);
75}
76#else
77#define seq_print_counters(x, y) 0
78#endif
79
80struct ct_iter_state {
81 unsigned int bucket;
82};
83
84static struct list_head *ct_get_first(struct seq_file *seq)
85{
86 struct ct_iter_state *st = seq->private;
87
88 for (st->bucket = 0;
89 st->bucket < ip_conntrack_htable_size;
90 st->bucket++) {
91 if (!list_empty(&ip_conntrack_hash[st->bucket]))
92 return ip_conntrack_hash[st->bucket].next;
93 }
94 return NULL;
95}
96
97static struct list_head *ct_get_next(struct seq_file *seq, struct list_head *head)
98{
99 struct ct_iter_state *st = seq->private;
100
101 head = head->next;
102 while (head == &ip_conntrack_hash[st->bucket]) {
103 if (++st->bucket >= ip_conntrack_htable_size)
104 return NULL;
105 head = ip_conntrack_hash[st->bucket].next;
106 }
107 return head;
108}
109
110static struct list_head *ct_get_idx(struct seq_file *seq, loff_t pos)
111{
112 struct list_head *head = ct_get_first(seq);
113
114 if (head)
115 while (pos && (head = ct_get_next(seq, head)))
116 pos--;
117 return pos ? NULL : head;
118}
119
120static void *ct_seq_start(struct seq_file *seq, loff_t *pos)
121{
122 READ_LOCK(&ip_conntrack_lock);
123 return ct_get_idx(seq, *pos);
124}
125
126static void *ct_seq_next(struct seq_file *s, void *v, loff_t *pos)
127{
128 (*pos)++;
129 return ct_get_next(s, v);
130}
131
132static void ct_seq_stop(struct seq_file *s, void *v)
133{
134 READ_UNLOCK(&ip_conntrack_lock);
135}
136
137static int ct_seq_show(struct seq_file *s, void *v)
138{
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;
142
143 MUST_BE_READ_LOCKED(&ip_conntrack_lock);
144 IP_NF_ASSERT(conntrack);
145
146 /* we only want to print DIR_ORIGINAL */
147 if (DIRECTION(hash))
148 return 0;
149
150 proto = ip_ct_find_proto(conntrack->tuplehash[IP_CT_DIR_ORIGINAL]
151 .tuple.dst.protonum);
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)
188 if (seq_printf(s, "mark=%lu ", conntrack->mark))
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 */
242 READ_LOCK(&ip_conntrack_lock);
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
259 e = e->next;
260
261 if (e == &ip_conntrack_expect_list)
262 return NULL;
263
264 return e;
265}
266
267static void exp_seq_stop(struct seq_file *s, void *v)
268{
269 READ_UNLOCK(&ip_conntrack_lock);
270}
271
272static int exp_seq_show(struct seq_file *s, void *v)
273{
274 struct ip_conntrack_expect *expect = v;
275
276 if (expect->timeout.function)
277 seq_printf(s, "%ld ", timer_pending(&expect->timeout)
278 ? (long)(expect->timeout.expires - jiffies)/HZ : 0);
279 else
280 seq_printf(s, "- ");
281
282 seq_printf(s, "proto=%u ", expect->tuple.dst.protonum);
283
284 print_tuple(s, &expect->tuple,
285 ip_ct_find_proto(expect->tuple.dst.protonum));
286 return seq_putc(s, '\n');
287}
288
289static struct seq_operations exp_seq_ops = {
290 .start = exp_seq_start,
291 .next = exp_seq_next,
292 .stop = exp_seq_stop,
293 .show = exp_seq_show
294};
295
296static int exp_open(struct inode *inode, struct file *file)
297{
298 return seq_open(file, &exp_seq_ops);
299}
300
301static struct file_operations exp_file_ops = {
302 .owner = THIS_MODULE,
303 .open = exp_open,
304 .read = seq_read,
305 .llseek = seq_lseek,
306 .release = seq_release
307};
308
309static void *ct_cpu_seq_start(struct seq_file *seq, loff_t *pos)
310{
311 int cpu;
312
313 if (*pos == 0)
314 return SEQ_START_TOKEN;
315
316 for (cpu = *pos-1; cpu < NR_CPUS; ++cpu) {
317 if (!cpu_possible(cpu))
318 continue;
319 *pos = cpu+1;
320 return &per_cpu(ip_conntrack_stat, cpu);
321 }
322
323 return NULL;
324}
325
326static void *ct_cpu_seq_next(struct seq_file *seq, void *v, loff_t *pos)
327{
328 int cpu;
329
330 for (cpu = *pos; cpu < NR_CPUS; ++cpu) {
331 if (!cpu_possible(cpu))
332 continue;
333 *pos = cpu+1;
334 return &per_cpu(ip_conntrack_stat, cpu);
335 }
336
337 return NULL;
338}
339
340static void ct_cpu_seq_stop(struct seq_file *seq, void *v)
341{
342}
343
344static int ct_cpu_seq_show(struct seq_file *seq, void *v)
345{
346 unsigned int nr_conntracks = atomic_read(&ip_conntrack_count);
347 struct ip_conntrack_stat *st = v;
348
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");
351 return 0;
352 }
353
354 seq_printf(seq, "%08x %08x %08x %08x %08x %08x %08x %08x "
355 "%08x %08x %08x %08x %08x %08x %08x %08x \n",
356 nr_conntracks,
357 st->searched,
358 st->found,
359 st->new,
360 st->invalid,
361 st->ignore,
362 st->delete,
363 st->delete_list,
364 st->insert,
365 st->insert_failed,
366 st->drop,
367 st->early_drop,
368 st->error,
369
370 st->expect_new,
371 st->expect_create,
372 st->expect_delete
373 );
374 return 0;
375}
376
377static 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,
382};
383
384static int ct_cpu_seq_open(struct inode *inode, struct file *file)
385{
386 return seq_open(file, &ct_cpu_seq_ops);
387}
388
389static struct file_operations ct_cpu_seq_fops = {
390 .owner = THIS_MODULE,
391 .open = ct_cpu_seq_open,
392 .read = seq_read,
393 .llseek = seq_lseek,
394 .release = seq_release_private,
395};
396#endif
397
398static 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 *))
403{
404 struct ip_conntrack *ct;
405 enum ip_conntrack_info ctinfo;
406
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) {
410 unsigned int ret;
411 ret = ct->helper->help(pskb, ct, ctinfo);
412 if (ret != NF_ACCEPT)
413 return ret;
414 }
415
416 /* We've seen it coming out the other side: confirm it */
417 return ip_conntrack_confirm(pskb);
418}
419
420static 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 *))
425{
426#if !defined(CONFIG_IP_NF_NAT) && !defined(CONFIG_IP_NF_NAT_MODULE)
427 /* Previously seen (loopback)? Ignore. Do this before
428 fragment check. */
429 if ((*pskb)->nfct)
430 return NF_ACCEPT;
431#endif
432
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);
439 if (!*pskb)
440 return NF_STOLEN;
441 }
442 return NF_ACCEPT;
443}
444
445static 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 *))
450{
451 struct rtable *rt = (struct rtable *)(*pskb)->dst;
452
453 /* We've seen it coming out the other side: confirm */
454 if (ip_confirm(hooknum, pskb, in, out, okfn) != NF_ACCEPT)
455 return NF_DROP;
456
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);
464 return NF_STOLEN;
465 }
466 return NF_ACCEPT;
467}
468
469static 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 *))
474{
475 /* root is playing with raw sockets. */
476 if ((*pskb)->len < sizeof(struct iphdr)
477 || (*pskb)->nh.iph->ihl * 4 < sizeof(struct iphdr)) {
478 if (net_ratelimit())
479 printk("ipt_hook: happy cracking.\n");
480 return NF_ACCEPT;
481 }
482 return ip_conntrack_in(hooknum, pskb, in, out, okfn);
483}
484
485/* Connection tracking may drop packets, but never alters them, so
486 make it the first hook. */
487static struct nf_hook_ops ip_conntrack_defrag_ops = {
488 .hook = ip_conntrack_defrag,
489 .owner = THIS_MODULE,
490 .pf = PF_INET,
491 .hooknum = NF_IP_PRE_ROUTING,
492 .priority = NF_IP_PRI_CONNTRACK_DEFRAG,
493};
494
495static struct nf_hook_ops ip_conntrack_in_ops = {
496 .hook = ip_conntrack_in,
497 .owner = THIS_MODULE,
498 .pf = PF_INET,
499 .hooknum = NF_IP_PRE_ROUTING,
500 .priority = NF_IP_PRI_CONNTRACK,
501};
502
503static struct nf_hook_ops ip_conntrack_defrag_local_out_ops = {
504 .hook = ip_conntrack_defrag,
505 .owner = THIS_MODULE,
506 .pf = PF_INET,
507 .hooknum = NF_IP_LOCAL_OUT,
508 .priority = NF_IP_PRI_CONNTRACK_DEFRAG,
509};
510
511static struct nf_hook_ops ip_conntrack_local_out_ops = {
512 .hook = ip_conntrack_local,
513 .owner = THIS_MODULE,
514 .pf = PF_INET,
515 .hooknum = NF_IP_LOCAL_OUT,
516 .priority = NF_IP_PRI_CONNTRACK,
517};
518
519/* Refragmenter; last chance. */
520static struct nf_hook_ops ip_conntrack_out_ops = {
521 .hook = ip_refrag,
522 .owner = THIS_MODULE,
523 .pf = PF_INET,
524 .hooknum = NF_IP_POST_ROUTING,
525 .priority = NF_IP_PRI_LAST,
526};
527
528static struct nf_hook_ops ip_conntrack_local_in_ops = {
529 .hook = ip_confirm,
530 .owner = THIS_MODULE,
531 .pf = PF_INET,
532 .hooknum = NF_IP_LOCAL_IN,
533 .priority = NF_IP_PRI_LAST-1,
534};
535
536/* Sysctl support */
537
538#ifdef CONFIG_SYSCTL
539
540/* From ip_conntrack_core.c */
541extern int ip_conntrack_max;
542extern unsigned int ip_conntrack_htable_size;
543
544/* From ip_conntrack_proto_tcp.c */
545extern unsigned long ip_ct_tcp_timeout_syn_sent;
546extern unsigned long ip_ct_tcp_timeout_syn_recv;
547extern unsigned long ip_ct_tcp_timeout_established;
548extern unsigned long ip_ct_tcp_timeout_fin_wait;
549extern unsigned long ip_ct_tcp_timeout_close_wait;
550extern unsigned long ip_ct_tcp_timeout_last_ack;
551extern unsigned long ip_ct_tcp_timeout_time_wait;
552extern unsigned long ip_ct_tcp_timeout_close;
553extern unsigned long ip_ct_tcp_timeout_max_retrans;
554extern int ip_ct_tcp_loose;
555extern int ip_ct_tcp_be_liberal;
556extern int ip_ct_tcp_max_retrans;
557
558/* From ip_conntrack_proto_udp.c */
559extern unsigned long ip_ct_udp_timeout;
560extern unsigned long ip_ct_udp_timeout_stream;
561
562/* From ip_conntrack_proto_icmp.c */
563extern unsigned long ip_ct_icmp_timeout;
564
565/* From ip_conntrack_proto_icmp.c */
566extern unsigned long ip_ct_generic_timeout;
567
568/* Log invalid packets of a given protocol */
569static int log_invalid_proto_min = 0;
570static int log_invalid_proto_max = 255;
571
572static struct ctl_table_header *ip_ct_sysctl_header;
573
574static ctl_table ip_ct_sysctl_table[] = {
575 {
576 .ctl_name = NET_IPV4_NF_CONNTRACK_MAX,
577 .procname = "ip_conntrack_max",
578 .data = &ip_conntrack_max,
579 .maxlen = sizeof(int),
580 .mode = 0644,
581 .proc_handler = &proc_dointvec,
582 },
583 {
584 .ctl_name = NET_IPV4_NF_CONNTRACK_COUNT,
585 .procname = "ip_conntrack_count",
586 .data = &ip_conntrack_count,
587 .maxlen = sizeof(int),
588 .mode = 0444,
589 .proc_handler = &proc_dointvec,
590 },
591 {
592 .ctl_name = NET_IPV4_NF_CONNTRACK_BUCKETS,
593 .procname = "ip_conntrack_buckets",
594 .data = &ip_conntrack_htable_size,
595 .maxlen = sizeof(unsigned int),
596 .mode = 0444,
597 .proc_handler = &proc_dointvec,
598 },
599 {
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),
604 .mode = 0644,
605 .proc_handler = &proc_dointvec_jiffies,
606 },
607 {
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),
612 .mode = 0644,
613 .proc_handler = &proc_dointvec_jiffies,
614 },
615 {
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),
620 .mode = 0644,
621 .proc_handler = &proc_dointvec_jiffies,
622 },
623 {
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),
628 .mode = 0644,
629 .proc_handler = &proc_dointvec_jiffies,
630 },
631 {
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),
636 .mode = 0644,
637 .proc_handler = &proc_dointvec_jiffies,
638 },
639 {
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),
644 .mode = 0644,
645 .proc_handler = &proc_dointvec_jiffies,
646 },
647 {
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),
652 .mode = 0644,
653 .proc_handler = &proc_dointvec_jiffies,
654 },
655 {
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),
660 .mode = 0644,
661 .proc_handler = &proc_dointvec_jiffies,
662 },
663 {
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),
668 .mode = 0644,
669 .proc_handler = &proc_dointvec_jiffies,
670 },
671 {
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),
676 .mode = 0644,
677 .proc_handler = &proc_dointvec_jiffies,
678 },
679 {
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),
684 .mode = 0644,
685 .proc_handler = &proc_dointvec_jiffies,
686 },
687 {
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),
692 .mode = 0644,
693 .proc_handler = &proc_dointvec_jiffies,
694 },
695 {
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),
700 .mode = 0644,
701 .proc_handler = &proc_dointvec_minmax,
702 .strategy = &sysctl_intvec,
703 .extra1 = &log_invalid_proto_min,
704 .extra2 = &log_invalid_proto_max,
705 },
706 {
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),
711 .mode = 0644,
712 .proc_handler = &proc_dointvec_jiffies,
713 },
714 {
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),
719 .mode = 0644,
720 .proc_handler = &proc_dointvec,
721 },
722 {
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),
727 .mode = 0644,
728 .proc_handler = &proc_dointvec,
729 },
730 {
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),
735 .mode = 0644,
736 .proc_handler = &proc_dointvec,
737 },
738 { .ctl_name = 0 }
739};
740
741#define NET_IP_CONNTRACK_MAX 2089
742
743static ctl_table ip_ct_netfilter_table[] = {
744 {
745 .ctl_name = NET_IPV4_NETFILTER,
746 .procname = "netfilter",
747 .mode = 0555,
748 .child = ip_ct_sysctl_table,
749 },
750 {
751 .ctl_name = NET_IP_CONNTRACK_MAX,
752 .procname = "ip_conntrack_max",
753 .data = &ip_conntrack_max,
754 .maxlen = sizeof(int),
755 .mode = 0644,
756 .proc_handler = &proc_dointvec
757 },
758 { .ctl_name = 0 }
759};
760
761static ctl_table ip_ct_ipv4_table[] = {
762 {
763 .ctl_name = NET_IPV4,
764 .procname = "ipv4",
765 .mode = 0555,
766 .child = ip_ct_netfilter_table,
767 },
768 { .ctl_name = 0 }
769};
770
771static ctl_table ip_ct_net_table[] = {
772 {
773 .ctl_name = CTL_NET,
774 .procname = "net",
775 .mode = 0555,
776 .child = ip_ct_ipv4_table,
777 },
778 { .ctl_name = 0 }
779};
780
781EXPORT_SYMBOL(ip_ct_log_invalid);
782#endif /* CONFIG_SYSCTL */
783
784static int init_or_cleanup(int init)
785{
786#ifdef CONFIG_PROC_FS
787 struct proc_dir_entry *proc, *proc_exp, *proc_stat;
788#endif
789 int ret = 0;
790
791 if (!init) goto cleanup;
792
793 ret = ip_conntrack_init();
794 if (ret < 0)
795 goto cleanup_nothing;
796
797#ifdef CONFIG_PROC_FS
798 ret = -ENOMEM;
799 proc = proc_net_fops_create("ip_conntrack", 0440, &ct_file_ops);
800 if (!proc) goto cleanup_init;
801
802 proc_exp = proc_net_fops_create("ip_conntrack_expect", 0440,
803 &exp_file_ops);
804 if (!proc_exp) goto cleanup_proc;
805
806 proc_stat = create_proc_entry("ip_conntrack", S_IRUGO, proc_net_stat);
807 if (!proc_stat)
808 goto cleanup_proc_exp;
809
810 proc_stat->proc_fops = &ct_cpu_seq_fops;
811 proc_stat->owner = THIS_MODULE;
812#endif
813
814 ret = nf_register_hook(&ip_conntrack_defrag_ops);
815 if (ret < 0) {
816 printk("ip_conntrack: can't register pre-routing defrag hook.\n");
817 goto cleanup_proc_stat;
818 }
819 ret = nf_register_hook(&ip_conntrack_defrag_local_out_ops);
820 if (ret < 0) {
821 printk("ip_conntrack: can't register local_out defrag hook.\n");
822 goto cleanup_defragops;
823 }
824 ret = nf_register_hook(&ip_conntrack_in_ops);
825 if (ret < 0) {
826 printk("ip_conntrack: can't register pre-routing hook.\n");
827 goto cleanup_defraglocalops;
828 }
829 ret = nf_register_hook(&ip_conntrack_local_out_ops);
830 if (ret < 0) {
831 printk("ip_conntrack: can't register local out hook.\n");
832 goto cleanup_inops;
833 }
834 ret = nf_register_hook(&ip_conntrack_out_ops);
835 if (ret < 0) {
836 printk("ip_conntrack: can't register post-routing hook.\n");
837 goto cleanup_inandlocalops;
838 }
839 ret = nf_register_hook(&ip_conntrack_local_in_ops);
840 if (ret < 0) {
841 printk("ip_conntrack: can't register local in hook.\n");
842 goto cleanup_inoutandlocalops;
843 }
844#ifdef CONFIG_SYSCTL
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");
848 ret = -ENOMEM;
849 goto cleanup_localinops;
850 }
851#endif
852
853 return ret;
854
855 cleanup:
856#ifdef CONFIG_SYSCTL
857 unregister_sysctl_table(ip_ct_sysctl_header);
858 cleanup_localinops:
859#endif
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);
865 cleanup_inops:
866 nf_unregister_hook(&ip_conntrack_in_ops);
867 cleanup_defraglocalops:
868 nf_unregister_hook(&ip_conntrack_defrag_local_out_ops);
869 cleanup_defragops:
870 nf_unregister_hook(&ip_conntrack_defrag_ops);
871 cleanup_proc_stat:
872#ifdef CONFIG_PROC_FS
873 remove_proc_entry("ip_conntrack", proc_net_stat);
874 cleanup_proc_exp:
875 proc_net_remove("ip_conntrack_expect");
876 cleanup_proc:
877 proc_net_remove("ip_conntrack");
878 cleanup_init:
879#endif /* CONFIG_PROC_FS */
880 ip_conntrack_cleanup();
881 cleanup_nothing:
882 return ret;
883}
884
885/* FIXME: Allow NULL functions and sub in pointers to generic for
886 them. --RR */
887int ip_conntrack_protocol_register(struct ip_conntrack_protocol *proto)
888{
889 int ret = 0;
890
891 WRITE_LOCK(&ip_conntrack_lock);
892 if (ip_ct_protos[proto->proto] != &ip_conntrack_generic_protocol) {
893 ret = -EBUSY;
894 goto out;
895 }
896 ip_ct_protos[proto->proto] = proto;
897 out:
898 WRITE_UNLOCK(&ip_conntrack_lock);
899 return ret;
900}
901
902void ip_conntrack_protocol_unregister(struct ip_conntrack_protocol *proto)
903{
904 WRITE_LOCK(&ip_conntrack_lock);
905 ip_ct_protos[proto->proto] = &ip_conntrack_generic_protocol;
906 WRITE_UNLOCK(&ip_conntrack_lock);
907
908 /* Somebody could be still looking at the proto in bh. */
909 synchronize_net();
910
911 /* Remove all contrack entries for this protocol */
912 ip_ct_iterate_cleanup(kill_proto, &proto->proto);
913}
914
915static int __init init(void)
916{
917 return init_or_cleanup(1);
918}
919
920static void __exit fini(void)
921{
922 init_or_cleanup(0);
923}
924
925module_init(init);
926module_exit(fini);
927
928/* Some modules need us, but don't depend directly on any symbol.
929 They should call this. */
930void need_ip_conntrack(void)
931{
932}
933
934EXPORT_SYMBOL(ip_conntrack_protocol_register);
935EXPORT_SYMBOL(ip_conntrack_protocol_unregister);
936EXPORT_SYMBOL(ip_ct_get_tuple);
937EXPORT_SYMBOL(invert_tuplepr);
938EXPORT_SYMBOL(ip_conntrack_alter_reply);
939EXPORT_SYMBOL(ip_conntrack_destroyed);
940EXPORT_SYMBOL(need_ip_conntrack);
941EXPORT_SYMBOL(ip_conntrack_helper_register);
942EXPORT_SYMBOL(ip_conntrack_helper_unregister);
943EXPORT_SYMBOL(ip_ct_iterate_cleanup);
944EXPORT_SYMBOL(ip_ct_refresh_acct);
945EXPORT_SYMBOL(ip_ct_protos);
946EXPORT_SYMBOL(ip_ct_find_proto);
947EXPORT_SYMBOL(ip_conntrack_expect_alloc);
948EXPORT_SYMBOL(ip_conntrack_expect_free);
949EXPORT_SYMBOL(ip_conntrack_expect_related);
950EXPORT_SYMBOL(ip_conntrack_unexpect_related);
951EXPORT_SYMBOL(ip_conntrack_tuple_taken);
952EXPORT_SYMBOL(ip_ct_gather_frags);
953EXPORT_SYMBOL(ip_conntrack_htable_size);
954EXPORT_SYMBOL(ip_conntrack_lock);
955EXPORT_SYMBOL(ip_conntrack_hash);
956EXPORT_SYMBOL(ip_conntrack_untracked);
957EXPORT_SYMBOL_GPL(ip_conntrack_find_get);
958EXPORT_SYMBOL_GPL(ip_conntrack_put);
959#ifdef CONFIG_IP_NF_NAT_NEEDED
960EXPORT_SYMBOL(ip_conntrack_tcp_update);
961#endif
kernel source for telekom puls (alcatel/mediatek)