Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 |
Harald Welte | 080774a | 2005-08-09 19:32:58 -0700 | [diff] [blame] | 8 | * (C) 2002-2005 Netfilter Core Team <coreteam@netfilter.org> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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> |
Arnaldo Carvalho de Melo | 14c8502 | 2005-12-27 02:43:12 -0200 | [diff] [blame] | 30 | #include <net/route.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | |
Patrick McHardy | e45b1be | 2005-06-21 14:01:30 -0700 | [diff] [blame] | 32 | #define ASSERT_READ_LOCK(x) |
| 33 | #define ASSERT_WRITE_LOCK(x) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
| 47 | MODULE_LICENSE("GPL"); |
| 48 | |
| 49 | extern atomic_t ip_conntrack_count; |
| 50 | DECLARE_PER_CPU(struct ip_conntrack_stat, ip_conntrack_stat); |
| 51 | |
| 52 | static 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 |
| 59 | static int |
| 60 | print_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 |
| 69 | static unsigned int |
| 70 | seq_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 | |
| 81 | struct ct_iter_state { |
| 82 | unsigned int bucket; |
| 83 | }; |
| 84 | |
| 85 | static 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 | |
| 98 | static 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 | |
| 111 | static 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 | |
| 121 | static void *ct_seq_start(struct seq_file *seq, loff_t *pos) |
| 122 | { |
Patrick McHardy | e45b1be | 2005-06-21 14:01:30 -0700 | [diff] [blame] | 123 | read_lock_bh(&ip_conntrack_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | return ct_get_idx(seq, *pos); |
| 125 | } |
| 126 | |
| 127 | static 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 | |
| 133 | static void ct_seq_stop(struct seq_file *s, void *v) |
| 134 | { |
Patrick McHardy | e45b1be | 2005-06-21 14:01:30 -0700 | [diff] [blame] | 135 | read_unlock_bh(&ip_conntrack_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | } |
| 137 | |
| 138 | static 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 | |
Patrick McHardy | e45b1be | 2005-06-21 14:01:30 -0700 | [diff] [blame] | 144 | ASSERT_READ_LOCK(&ip_conntrack_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | IP_NF_ASSERT(conntrack); |
| 146 | |
| 147 | /* we only want to print DIR_ORIGINAL */ |
| 148 | if (DIRECTION(hash)) |
| 149 | return 0; |
| 150 | |
Harald Welte | 080774a | 2005-08-09 19:32:58 -0700 | [diff] [blame] | 151 | proto = __ip_conntrack_proto_find(conntrack->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.protonum); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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) |
Harald Welte | bf3a46a | 2005-08-09 19:22:01 -0700 | [diff] [blame] | 188 | if (seq_printf(s, "mark=%u ", conntrack->mark)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
| 198 | static 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 | |
| 205 | static 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; |
| 221 | out_free: |
| 222 | kfree(st); |
| 223 | return ret; |
| 224 | } |
| 225 | |
| 226 | static 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 */ |
| 235 | static 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 */ |
Patrick McHardy | e45b1be | 2005-06-21 14:01:30 -0700 | [diff] [blame] | 242 | read_lock_bh(&ip_conntrack_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
| 255 | static void *exp_seq_next(struct seq_file *s, void *v, loff_t *pos) |
| 256 | { |
| 257 | struct list_head *e = v; |
| 258 | |
Patrick McHardy | a96aca8 | 2005-06-13 18:27:13 -0700 | [diff] [blame] | 259 | ++*pos; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | e = e->next; |
| 261 | |
| 262 | if (e == &ip_conntrack_expect_list) |
| 263 | return NULL; |
| 264 | |
| 265 | return e; |
| 266 | } |
| 267 | |
| 268 | static void exp_seq_stop(struct seq_file *s, void *v) |
| 269 | { |
Patrick McHardy | e45b1be | 2005-06-21 14:01:30 -0700 | [diff] [blame] | 270 | read_unlock_bh(&ip_conntrack_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | } |
| 272 | |
| 273 | static 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, |
Harald Welte | 080774a | 2005-08-09 19:32:58 -0700 | [diff] [blame] | 286 | __ip_conntrack_proto_find(expect->tuple.dst.protonum)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | return seq_putc(s, '\n'); |
| 288 | } |
| 289 | |
| 290 | static 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 | |
| 297 | static int exp_open(struct inode *inode, struct file *file) |
| 298 | { |
| 299 | return seq_open(file, &exp_seq_ops); |
| 300 | } |
| 301 | |
| 302 | static 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 | |
| 310 | static 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 | |
| 327 | static 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 | |
| 341 | static void ct_cpu_seq_stop(struct seq_file *seq, void *v) |
| 342 | { |
| 343 | } |
| 344 | |
| 345 | static 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 | |
| 378 | static 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 | |
| 385 | static int ct_cpu_seq_open(struct inode *inode, struct file *file) |
| 386 | { |
| 387 | return seq_open(file, &ct_cpu_seq_ops); |
| 388 | } |
| 389 | |
| 390 | static 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 | |
| 399 | static 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 *)) |
| 404 | { |
Patrick McHardy | e281e3a | 2005-04-24 18:41:38 -0700 | [diff] [blame] | 405 | /* We've seen it coming out the other side: confirm it */ |
| 406 | return ip_conntrack_confirm(pskb); |
| 407 | } |
| 408 | |
| 409 | static 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 *)) |
| 414 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | } |
Patrick McHardy | e281e3a | 2005-04-24 18:41:38 -0700 | [diff] [blame] | 426 | return NF_ACCEPT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | } |
| 428 | |
| 429 | static 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 | { |
Phil Oester | 84531c2 | 2005-07-12 11:57:52 -0700 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 454 | static 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. */ |
| 472 | static struct nf_hook_ops ip_conntrack_defrag_ops = { |
| 473 | .hook = ip_conntrack_defrag, |
| 474 | .owner = THIS_MODULE, |
| 475 | .pf = PF_INET, |
| 476 | .hooknum = NF_IP_PRE_ROUTING, |
| 477 | .priority = NF_IP_PRI_CONNTRACK_DEFRAG, |
| 478 | }; |
| 479 | |
| 480 | static struct nf_hook_ops ip_conntrack_in_ops = { |
| 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 | static struct nf_hook_ops ip_conntrack_defrag_local_out_ops = { |
| 489 | .hook = ip_conntrack_defrag, |
| 490 | .owner = THIS_MODULE, |
| 491 | .pf = PF_INET, |
| 492 | .hooknum = NF_IP_LOCAL_OUT, |
| 493 | .priority = NF_IP_PRI_CONNTRACK_DEFRAG, |
| 494 | }; |
| 495 | |
| 496 | static struct nf_hook_ops ip_conntrack_local_out_ops = { |
| 497 | .hook = ip_conntrack_local, |
| 498 | .owner = THIS_MODULE, |
| 499 | .pf = PF_INET, |
| 500 | .hooknum = NF_IP_LOCAL_OUT, |
| 501 | .priority = NF_IP_PRI_CONNTRACK, |
| 502 | }; |
| 503 | |
Patrick McHardy | e281e3a | 2005-04-24 18:41:38 -0700 | [diff] [blame] | 504 | /* helpers */ |
| 505 | static struct nf_hook_ops ip_conntrack_helper_out_ops = { |
| 506 | .hook = ip_conntrack_help, |
| 507 | .owner = THIS_MODULE, |
| 508 | .pf = PF_INET, |
| 509 | .hooknum = NF_IP_POST_ROUTING, |
| 510 | .priority = NF_IP_PRI_CONNTRACK_HELPER, |
| 511 | }; |
| 512 | |
| 513 | static struct nf_hook_ops ip_conntrack_helper_in_ops = { |
| 514 | .hook = ip_conntrack_help, |
| 515 | .owner = THIS_MODULE, |
| 516 | .pf = PF_INET, |
| 517 | .hooknum = NF_IP_LOCAL_IN, |
| 518 | .priority = NF_IP_PRI_CONNTRACK_HELPER, |
| 519 | }; |
| 520 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 521 | /* Refragmenter; last chance. */ |
| 522 | static struct nf_hook_ops ip_conntrack_out_ops = { |
Patrick McHardy | 1bd9bef | 2006-01-05 12:20:59 -0800 | [diff] [blame] | 523 | .hook = ip_confirm, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 524 | .owner = THIS_MODULE, |
| 525 | .pf = PF_INET, |
| 526 | .hooknum = NF_IP_POST_ROUTING, |
Patrick McHardy | e281e3a | 2005-04-24 18:41:38 -0700 | [diff] [blame] | 527 | .priority = NF_IP_PRI_CONNTRACK_CONFIRM, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 528 | }; |
| 529 | |
| 530 | static struct nf_hook_ops ip_conntrack_local_in_ops = { |
| 531 | .hook = ip_confirm, |
| 532 | .owner = THIS_MODULE, |
| 533 | .pf = PF_INET, |
| 534 | .hooknum = NF_IP_LOCAL_IN, |
Patrick McHardy | e281e3a | 2005-04-24 18:41:38 -0700 | [diff] [blame] | 535 | .priority = NF_IP_PRI_CONNTRACK_CONFIRM, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 536 | }; |
| 537 | |
| 538 | /* Sysctl support */ |
| 539 | |
| 540 | #ifdef CONFIG_SYSCTL |
| 541 | |
| 542 | /* From ip_conntrack_core.c */ |
| 543 | extern int ip_conntrack_max; |
| 544 | extern unsigned int ip_conntrack_htable_size; |
| 545 | |
| 546 | /* From ip_conntrack_proto_tcp.c */ |
Patrick McHardy | babbdb1 | 2006-01-09 17:48:09 -0800 | [diff] [blame] | 547 | extern unsigned int ip_ct_tcp_timeout_syn_sent; |
| 548 | extern unsigned int ip_ct_tcp_timeout_syn_recv; |
| 549 | extern unsigned int ip_ct_tcp_timeout_established; |
| 550 | extern unsigned int ip_ct_tcp_timeout_fin_wait; |
| 551 | extern unsigned int ip_ct_tcp_timeout_close_wait; |
| 552 | extern unsigned int ip_ct_tcp_timeout_last_ack; |
| 553 | extern unsigned int ip_ct_tcp_timeout_time_wait; |
| 554 | extern unsigned int ip_ct_tcp_timeout_close; |
| 555 | extern unsigned int ip_ct_tcp_timeout_max_retrans; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 556 | extern int ip_ct_tcp_loose; |
| 557 | extern int ip_ct_tcp_be_liberal; |
| 558 | extern int ip_ct_tcp_max_retrans; |
| 559 | |
| 560 | /* From ip_conntrack_proto_udp.c */ |
Patrick McHardy | babbdb1 | 2006-01-09 17:48:09 -0800 | [diff] [blame] | 561 | extern unsigned int ip_ct_udp_timeout; |
| 562 | extern unsigned int ip_ct_udp_timeout_stream; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 563 | |
| 564 | /* From ip_conntrack_proto_icmp.c */ |
Patrick McHardy | babbdb1 | 2006-01-09 17:48:09 -0800 | [diff] [blame] | 565 | extern unsigned int ip_ct_icmp_timeout; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 566 | |
| 567 | /* From ip_conntrack_proto_icmp.c */ |
Patrick McHardy | babbdb1 | 2006-01-09 17:48:09 -0800 | [diff] [blame] | 568 | extern unsigned int ip_ct_generic_timeout; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 569 | |
| 570 | /* Log invalid packets of a given protocol */ |
| 571 | static int log_invalid_proto_min = 0; |
| 572 | static int log_invalid_proto_max = 255; |
| 573 | |
| 574 | static struct ctl_table_header *ip_ct_sysctl_header; |
| 575 | |
| 576 | static ctl_table ip_ct_sysctl_table[] = { |
| 577 | { |
| 578 | .ctl_name = NET_IPV4_NF_CONNTRACK_MAX, |
| 579 | .procname = "ip_conntrack_max", |
| 580 | .data = &ip_conntrack_max, |
| 581 | .maxlen = sizeof(int), |
| 582 | .mode = 0644, |
| 583 | .proc_handler = &proc_dointvec, |
| 584 | }, |
| 585 | { |
| 586 | .ctl_name = NET_IPV4_NF_CONNTRACK_COUNT, |
| 587 | .procname = "ip_conntrack_count", |
| 588 | .data = &ip_conntrack_count, |
| 589 | .maxlen = sizeof(int), |
| 590 | .mode = 0444, |
| 591 | .proc_handler = &proc_dointvec, |
| 592 | }, |
| 593 | { |
| 594 | .ctl_name = NET_IPV4_NF_CONNTRACK_BUCKETS, |
| 595 | .procname = "ip_conntrack_buckets", |
| 596 | .data = &ip_conntrack_htable_size, |
| 597 | .maxlen = sizeof(unsigned int), |
| 598 | .mode = 0444, |
| 599 | .proc_handler = &proc_dointvec, |
| 600 | }, |
| 601 | { |
| 602 | .ctl_name = NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_SYN_SENT, |
| 603 | .procname = "ip_conntrack_tcp_timeout_syn_sent", |
| 604 | .data = &ip_ct_tcp_timeout_syn_sent, |
| 605 | .maxlen = sizeof(unsigned int), |
| 606 | .mode = 0644, |
| 607 | .proc_handler = &proc_dointvec_jiffies, |
| 608 | }, |
| 609 | { |
| 610 | .ctl_name = NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_SYN_RECV, |
| 611 | .procname = "ip_conntrack_tcp_timeout_syn_recv", |
| 612 | .data = &ip_ct_tcp_timeout_syn_recv, |
| 613 | .maxlen = sizeof(unsigned int), |
| 614 | .mode = 0644, |
| 615 | .proc_handler = &proc_dointvec_jiffies, |
| 616 | }, |
| 617 | { |
| 618 | .ctl_name = NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_ESTABLISHED, |
| 619 | .procname = "ip_conntrack_tcp_timeout_established", |
| 620 | .data = &ip_ct_tcp_timeout_established, |
| 621 | .maxlen = sizeof(unsigned int), |
| 622 | .mode = 0644, |
| 623 | .proc_handler = &proc_dointvec_jiffies, |
| 624 | }, |
| 625 | { |
| 626 | .ctl_name = NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_FIN_WAIT, |
| 627 | .procname = "ip_conntrack_tcp_timeout_fin_wait", |
| 628 | .data = &ip_ct_tcp_timeout_fin_wait, |
| 629 | .maxlen = sizeof(unsigned int), |
| 630 | .mode = 0644, |
| 631 | .proc_handler = &proc_dointvec_jiffies, |
| 632 | }, |
| 633 | { |
| 634 | .ctl_name = NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_CLOSE_WAIT, |
| 635 | .procname = "ip_conntrack_tcp_timeout_close_wait", |
| 636 | .data = &ip_ct_tcp_timeout_close_wait, |
| 637 | .maxlen = sizeof(unsigned int), |
| 638 | .mode = 0644, |
| 639 | .proc_handler = &proc_dointvec_jiffies, |
| 640 | }, |
| 641 | { |
| 642 | .ctl_name = NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_LAST_ACK, |
| 643 | .procname = "ip_conntrack_tcp_timeout_last_ack", |
| 644 | .data = &ip_ct_tcp_timeout_last_ack, |
| 645 | .maxlen = sizeof(unsigned int), |
| 646 | .mode = 0644, |
| 647 | .proc_handler = &proc_dointvec_jiffies, |
| 648 | }, |
| 649 | { |
| 650 | .ctl_name = NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_TIME_WAIT, |
| 651 | .procname = "ip_conntrack_tcp_timeout_time_wait", |
| 652 | .data = &ip_ct_tcp_timeout_time_wait, |
| 653 | .maxlen = sizeof(unsigned int), |
| 654 | .mode = 0644, |
| 655 | .proc_handler = &proc_dointvec_jiffies, |
| 656 | }, |
| 657 | { |
| 658 | .ctl_name = NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_CLOSE, |
| 659 | .procname = "ip_conntrack_tcp_timeout_close", |
| 660 | .data = &ip_ct_tcp_timeout_close, |
| 661 | .maxlen = sizeof(unsigned int), |
| 662 | .mode = 0644, |
| 663 | .proc_handler = &proc_dointvec_jiffies, |
| 664 | }, |
| 665 | { |
| 666 | .ctl_name = NET_IPV4_NF_CONNTRACK_UDP_TIMEOUT, |
| 667 | .procname = "ip_conntrack_udp_timeout", |
| 668 | .data = &ip_ct_udp_timeout, |
| 669 | .maxlen = sizeof(unsigned int), |
| 670 | .mode = 0644, |
| 671 | .proc_handler = &proc_dointvec_jiffies, |
| 672 | }, |
| 673 | { |
| 674 | .ctl_name = NET_IPV4_NF_CONNTRACK_UDP_TIMEOUT_STREAM, |
| 675 | .procname = "ip_conntrack_udp_timeout_stream", |
| 676 | .data = &ip_ct_udp_timeout_stream, |
| 677 | .maxlen = sizeof(unsigned int), |
| 678 | .mode = 0644, |
| 679 | .proc_handler = &proc_dointvec_jiffies, |
| 680 | }, |
| 681 | { |
| 682 | .ctl_name = NET_IPV4_NF_CONNTRACK_ICMP_TIMEOUT, |
| 683 | .procname = "ip_conntrack_icmp_timeout", |
| 684 | .data = &ip_ct_icmp_timeout, |
| 685 | .maxlen = sizeof(unsigned int), |
| 686 | .mode = 0644, |
| 687 | .proc_handler = &proc_dointvec_jiffies, |
| 688 | }, |
| 689 | { |
| 690 | .ctl_name = NET_IPV4_NF_CONNTRACK_GENERIC_TIMEOUT, |
| 691 | .procname = "ip_conntrack_generic_timeout", |
| 692 | .data = &ip_ct_generic_timeout, |
| 693 | .maxlen = sizeof(unsigned int), |
| 694 | .mode = 0644, |
| 695 | .proc_handler = &proc_dointvec_jiffies, |
| 696 | }, |
| 697 | { |
| 698 | .ctl_name = NET_IPV4_NF_CONNTRACK_LOG_INVALID, |
| 699 | .procname = "ip_conntrack_log_invalid", |
| 700 | .data = &ip_ct_log_invalid, |
| 701 | .maxlen = sizeof(unsigned int), |
| 702 | .mode = 0644, |
| 703 | .proc_handler = &proc_dointvec_minmax, |
| 704 | .strategy = &sysctl_intvec, |
| 705 | .extra1 = &log_invalid_proto_min, |
| 706 | .extra2 = &log_invalid_proto_max, |
| 707 | }, |
| 708 | { |
| 709 | .ctl_name = NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_MAX_RETRANS, |
| 710 | .procname = "ip_conntrack_tcp_timeout_max_retrans", |
| 711 | .data = &ip_ct_tcp_timeout_max_retrans, |
| 712 | .maxlen = sizeof(unsigned int), |
| 713 | .mode = 0644, |
| 714 | .proc_handler = &proc_dointvec_jiffies, |
| 715 | }, |
| 716 | { |
| 717 | .ctl_name = NET_IPV4_NF_CONNTRACK_TCP_LOOSE, |
| 718 | .procname = "ip_conntrack_tcp_loose", |
| 719 | .data = &ip_ct_tcp_loose, |
| 720 | .maxlen = sizeof(unsigned int), |
| 721 | .mode = 0644, |
| 722 | .proc_handler = &proc_dointvec, |
| 723 | }, |
| 724 | { |
| 725 | .ctl_name = NET_IPV4_NF_CONNTRACK_TCP_BE_LIBERAL, |
| 726 | .procname = "ip_conntrack_tcp_be_liberal", |
| 727 | .data = &ip_ct_tcp_be_liberal, |
| 728 | .maxlen = sizeof(unsigned int), |
| 729 | .mode = 0644, |
| 730 | .proc_handler = &proc_dointvec, |
| 731 | }, |
| 732 | { |
| 733 | .ctl_name = NET_IPV4_NF_CONNTRACK_TCP_MAX_RETRANS, |
| 734 | .procname = "ip_conntrack_tcp_max_retrans", |
| 735 | .data = &ip_ct_tcp_max_retrans, |
| 736 | .maxlen = sizeof(unsigned int), |
| 737 | .mode = 0644, |
| 738 | .proc_handler = &proc_dointvec, |
| 739 | }, |
| 740 | { .ctl_name = 0 } |
| 741 | }; |
| 742 | |
| 743 | #define NET_IP_CONNTRACK_MAX 2089 |
| 744 | |
| 745 | static ctl_table ip_ct_netfilter_table[] = { |
| 746 | { |
| 747 | .ctl_name = NET_IPV4_NETFILTER, |
| 748 | .procname = "netfilter", |
| 749 | .mode = 0555, |
| 750 | .child = ip_ct_sysctl_table, |
| 751 | }, |
| 752 | { |
| 753 | .ctl_name = NET_IP_CONNTRACK_MAX, |
| 754 | .procname = "ip_conntrack_max", |
| 755 | .data = &ip_conntrack_max, |
| 756 | .maxlen = sizeof(int), |
| 757 | .mode = 0644, |
| 758 | .proc_handler = &proc_dointvec |
| 759 | }, |
| 760 | { .ctl_name = 0 } |
| 761 | }; |
| 762 | |
| 763 | static ctl_table ip_ct_ipv4_table[] = { |
| 764 | { |
| 765 | .ctl_name = NET_IPV4, |
| 766 | .procname = "ipv4", |
| 767 | .mode = 0555, |
| 768 | .child = ip_ct_netfilter_table, |
| 769 | }, |
| 770 | { .ctl_name = 0 } |
| 771 | }; |
| 772 | |
| 773 | static ctl_table ip_ct_net_table[] = { |
| 774 | { |
| 775 | .ctl_name = CTL_NET, |
| 776 | .procname = "net", |
| 777 | .mode = 0555, |
| 778 | .child = ip_ct_ipv4_table, |
| 779 | }, |
| 780 | { .ctl_name = 0 } |
| 781 | }; |
| 782 | |
| 783 | EXPORT_SYMBOL(ip_ct_log_invalid); |
| 784 | #endif /* CONFIG_SYSCTL */ |
| 785 | |
| 786 | static int init_or_cleanup(int init) |
| 787 | { |
| 788 | #ifdef CONFIG_PROC_FS |
| 789 | struct proc_dir_entry *proc, *proc_exp, *proc_stat; |
| 790 | #endif |
| 791 | int ret = 0; |
| 792 | |
| 793 | if (!init) goto cleanup; |
| 794 | |
| 795 | ret = ip_conntrack_init(); |
| 796 | if (ret < 0) |
| 797 | goto cleanup_nothing; |
| 798 | |
| 799 | #ifdef CONFIG_PROC_FS |
| 800 | ret = -ENOMEM; |
| 801 | proc = proc_net_fops_create("ip_conntrack", 0440, &ct_file_ops); |
| 802 | if (!proc) goto cleanup_init; |
| 803 | |
| 804 | proc_exp = proc_net_fops_create("ip_conntrack_expect", 0440, |
| 805 | &exp_file_ops); |
| 806 | if (!proc_exp) goto cleanup_proc; |
| 807 | |
| 808 | proc_stat = create_proc_entry("ip_conntrack", S_IRUGO, proc_net_stat); |
| 809 | if (!proc_stat) |
| 810 | goto cleanup_proc_exp; |
| 811 | |
| 812 | proc_stat->proc_fops = &ct_cpu_seq_fops; |
| 813 | proc_stat->owner = THIS_MODULE; |
| 814 | #endif |
| 815 | |
| 816 | ret = nf_register_hook(&ip_conntrack_defrag_ops); |
| 817 | if (ret < 0) { |
| 818 | printk("ip_conntrack: can't register pre-routing defrag hook.\n"); |
| 819 | goto cleanup_proc_stat; |
| 820 | } |
| 821 | ret = nf_register_hook(&ip_conntrack_defrag_local_out_ops); |
| 822 | if (ret < 0) { |
| 823 | printk("ip_conntrack: can't register local_out defrag hook.\n"); |
| 824 | goto cleanup_defragops; |
| 825 | } |
| 826 | ret = nf_register_hook(&ip_conntrack_in_ops); |
| 827 | if (ret < 0) { |
| 828 | printk("ip_conntrack: can't register pre-routing hook.\n"); |
| 829 | goto cleanup_defraglocalops; |
| 830 | } |
| 831 | ret = nf_register_hook(&ip_conntrack_local_out_ops); |
| 832 | if (ret < 0) { |
| 833 | printk("ip_conntrack: can't register local out hook.\n"); |
| 834 | goto cleanup_inops; |
| 835 | } |
Patrick McHardy | e281e3a | 2005-04-24 18:41:38 -0700 | [diff] [blame] | 836 | ret = nf_register_hook(&ip_conntrack_helper_in_ops); |
| 837 | if (ret < 0) { |
| 838 | printk("ip_conntrack: can't register local in helper hook.\n"); |
| 839 | goto cleanup_inandlocalops; |
| 840 | } |
| 841 | ret = nf_register_hook(&ip_conntrack_helper_out_ops); |
| 842 | if (ret < 0) { |
| 843 | printk("ip_conntrack: can't register postrouting helper hook.\n"); |
| 844 | goto cleanup_helperinops; |
| 845 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 846 | ret = nf_register_hook(&ip_conntrack_out_ops); |
| 847 | if (ret < 0) { |
| 848 | printk("ip_conntrack: can't register post-routing hook.\n"); |
Patrick McHardy | e281e3a | 2005-04-24 18:41:38 -0700 | [diff] [blame] | 849 | goto cleanup_helperoutops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 850 | } |
| 851 | ret = nf_register_hook(&ip_conntrack_local_in_ops); |
| 852 | if (ret < 0) { |
| 853 | printk("ip_conntrack: can't register local in hook.\n"); |
| 854 | goto cleanup_inoutandlocalops; |
| 855 | } |
| 856 | #ifdef CONFIG_SYSCTL |
| 857 | ip_ct_sysctl_header = register_sysctl_table(ip_ct_net_table, 0); |
| 858 | if (ip_ct_sysctl_header == NULL) { |
| 859 | printk("ip_conntrack: can't register to sysctl.\n"); |
| 860 | ret = -ENOMEM; |
| 861 | goto cleanup_localinops; |
| 862 | } |
| 863 | #endif |
| 864 | |
| 865 | return ret; |
| 866 | |
| 867 | cleanup: |
Harald Welte | ac3247b | 2005-08-09 19:28:03 -0700 | [diff] [blame] | 868 | synchronize_net(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 869 | #ifdef CONFIG_SYSCTL |
| 870 | unregister_sysctl_table(ip_ct_sysctl_header); |
| 871 | cleanup_localinops: |
| 872 | #endif |
| 873 | nf_unregister_hook(&ip_conntrack_local_in_ops); |
| 874 | cleanup_inoutandlocalops: |
| 875 | nf_unregister_hook(&ip_conntrack_out_ops); |
Patrick McHardy | e281e3a | 2005-04-24 18:41:38 -0700 | [diff] [blame] | 876 | cleanup_helperoutops: |
| 877 | nf_unregister_hook(&ip_conntrack_helper_out_ops); |
| 878 | cleanup_helperinops: |
| 879 | nf_unregister_hook(&ip_conntrack_helper_in_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 880 | cleanup_inandlocalops: |
| 881 | nf_unregister_hook(&ip_conntrack_local_out_ops); |
| 882 | cleanup_inops: |
| 883 | nf_unregister_hook(&ip_conntrack_in_ops); |
| 884 | cleanup_defraglocalops: |
| 885 | nf_unregister_hook(&ip_conntrack_defrag_local_out_ops); |
| 886 | cleanup_defragops: |
| 887 | nf_unregister_hook(&ip_conntrack_defrag_ops); |
| 888 | cleanup_proc_stat: |
| 889 | #ifdef CONFIG_PROC_FS |
| 890 | remove_proc_entry("ip_conntrack", proc_net_stat); |
| 891 | cleanup_proc_exp: |
| 892 | proc_net_remove("ip_conntrack_expect"); |
| 893 | cleanup_proc: |
| 894 | proc_net_remove("ip_conntrack"); |
| 895 | cleanup_init: |
| 896 | #endif /* CONFIG_PROC_FS */ |
| 897 | ip_conntrack_cleanup(); |
| 898 | cleanup_nothing: |
| 899 | return ret; |
| 900 | } |
| 901 | |
| 902 | /* FIXME: Allow NULL functions and sub in pointers to generic for |
| 903 | them. --RR */ |
| 904 | int ip_conntrack_protocol_register(struct ip_conntrack_protocol *proto) |
| 905 | { |
| 906 | int ret = 0; |
| 907 | |
Patrick McHardy | e45b1be | 2005-06-21 14:01:30 -0700 | [diff] [blame] | 908 | write_lock_bh(&ip_conntrack_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 909 | if (ip_ct_protos[proto->proto] != &ip_conntrack_generic_protocol) { |
| 910 | ret = -EBUSY; |
| 911 | goto out; |
| 912 | } |
| 913 | ip_ct_protos[proto->proto] = proto; |
| 914 | out: |
Patrick McHardy | e45b1be | 2005-06-21 14:01:30 -0700 | [diff] [blame] | 915 | write_unlock_bh(&ip_conntrack_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 916 | return ret; |
| 917 | } |
| 918 | |
| 919 | void ip_conntrack_protocol_unregister(struct ip_conntrack_protocol *proto) |
| 920 | { |
Patrick McHardy | e45b1be | 2005-06-21 14:01:30 -0700 | [diff] [blame] | 921 | write_lock_bh(&ip_conntrack_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 922 | ip_ct_protos[proto->proto] = &ip_conntrack_generic_protocol; |
Patrick McHardy | e45b1be | 2005-06-21 14:01:30 -0700 | [diff] [blame] | 923 | write_unlock_bh(&ip_conntrack_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 924 | |
| 925 | /* Somebody could be still looking at the proto in bh. */ |
| 926 | synchronize_net(); |
| 927 | |
| 928 | /* Remove all contrack entries for this protocol */ |
| 929 | ip_ct_iterate_cleanup(kill_proto, &proto->proto); |
| 930 | } |
| 931 | |
Andrew Morton | 65b4b4e | 2006-03-28 16:37:06 -0800 | [diff] [blame] | 932 | static int __init ip_conntrack_standalone_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 933 | { |
| 934 | return init_or_cleanup(1); |
| 935 | } |
| 936 | |
Andrew Morton | 65b4b4e | 2006-03-28 16:37:06 -0800 | [diff] [blame] | 937 | static void __exit ip_conntrack_standalone_fini(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 938 | { |
| 939 | init_or_cleanup(0); |
| 940 | } |
| 941 | |
Andrew Morton | 65b4b4e | 2006-03-28 16:37:06 -0800 | [diff] [blame] | 942 | module_init(ip_conntrack_standalone_init); |
| 943 | module_exit(ip_conntrack_standalone_fini); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 944 | |
| 945 | /* Some modules need us, but don't depend directly on any symbol. |
| 946 | They should call this. */ |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 947 | void need_conntrack(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 948 | { |
| 949 | } |
| 950 | |
Harald Welte | ac3247b | 2005-08-09 19:28:03 -0700 | [diff] [blame] | 951 | #ifdef CONFIG_IP_NF_CONNTRACK_EVENTS |
| 952 | EXPORT_SYMBOL_GPL(ip_conntrack_chain); |
| 953 | EXPORT_SYMBOL_GPL(ip_conntrack_expect_chain); |
| 954 | EXPORT_SYMBOL_GPL(ip_conntrack_register_notifier); |
| 955 | EXPORT_SYMBOL_GPL(ip_conntrack_unregister_notifier); |
Patrick McHardy | a86888b | 2005-08-09 20:02:13 -0700 | [diff] [blame] | 956 | EXPORT_SYMBOL_GPL(__ip_ct_event_cache_init); |
Harald Welte | ac3247b | 2005-08-09 19:28:03 -0700 | [diff] [blame] | 957 | EXPORT_PER_CPU_SYMBOL_GPL(ip_conntrack_ecache); |
| 958 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 959 | EXPORT_SYMBOL(ip_conntrack_protocol_register); |
| 960 | EXPORT_SYMBOL(ip_conntrack_protocol_unregister); |
| 961 | EXPORT_SYMBOL(ip_ct_get_tuple); |
| 962 | EXPORT_SYMBOL(invert_tuplepr); |
| 963 | EXPORT_SYMBOL(ip_conntrack_alter_reply); |
| 964 | EXPORT_SYMBOL(ip_conntrack_destroyed); |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 965 | EXPORT_SYMBOL(need_conntrack); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 966 | EXPORT_SYMBOL(ip_conntrack_helper_register); |
| 967 | EXPORT_SYMBOL(ip_conntrack_helper_unregister); |
| 968 | EXPORT_SYMBOL(ip_ct_iterate_cleanup); |
Harald Welte | 1dfbab5 | 2005-09-22 23:46:57 -0700 | [diff] [blame] | 969 | EXPORT_SYMBOL(__ip_ct_refresh_acct); |
Harald Welte | 080774a | 2005-08-09 19:32:58 -0700 | [diff] [blame] | 970 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 971 | EXPORT_SYMBOL(ip_conntrack_expect_alloc); |
Rusty Russell | 4acdbdb | 2005-07-21 13:14:46 -0700 | [diff] [blame] | 972 | EXPORT_SYMBOL(ip_conntrack_expect_put); |
Patrick McHardy | a41bc00 | 2005-09-19 15:35:31 -0700 | [diff] [blame] | 973 | EXPORT_SYMBOL_GPL(__ip_conntrack_expect_find); |
| 974 | EXPORT_SYMBOL_GPL(ip_conntrack_expect_find); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 975 | EXPORT_SYMBOL(ip_conntrack_expect_related); |
| 976 | EXPORT_SYMBOL(ip_conntrack_unexpect_related); |
Harald Welte | 080774a | 2005-08-09 19:32:58 -0700 | [diff] [blame] | 977 | EXPORT_SYMBOL_GPL(ip_conntrack_expect_list); |
Pablo Neira Ayuso | 49719eb | 2005-09-06 15:10:46 -0700 | [diff] [blame] | 978 | EXPORT_SYMBOL_GPL(ip_ct_unlink_expect); |
Harald Welte | 080774a | 2005-08-09 19:32:58 -0700 | [diff] [blame] | 979 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 980 | EXPORT_SYMBOL(ip_conntrack_tuple_taken); |
| 981 | EXPORT_SYMBOL(ip_ct_gather_frags); |
| 982 | EXPORT_SYMBOL(ip_conntrack_htable_size); |
| 983 | EXPORT_SYMBOL(ip_conntrack_lock); |
| 984 | EXPORT_SYMBOL(ip_conntrack_hash); |
| 985 | EXPORT_SYMBOL(ip_conntrack_untracked); |
| 986 | EXPORT_SYMBOL_GPL(ip_conntrack_find_get); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 987 | #ifdef CONFIG_IP_NF_NAT_NEEDED |
| 988 | EXPORT_SYMBOL(ip_conntrack_tcp_update); |
| 989 | #endif |
Harald Welte | 080774a | 2005-08-09 19:32:58 -0700 | [diff] [blame] | 990 | |
| 991 | EXPORT_SYMBOL_GPL(ip_conntrack_flush); |
| 992 | EXPORT_SYMBOL_GPL(__ip_conntrack_find); |
| 993 | |
| 994 | EXPORT_SYMBOL_GPL(ip_conntrack_alloc); |
| 995 | EXPORT_SYMBOL_GPL(ip_conntrack_free); |
| 996 | EXPORT_SYMBOL_GPL(ip_conntrack_hash_insert); |
| 997 | |
| 998 | EXPORT_SYMBOL_GPL(ip_ct_remove_expectations); |
| 999 | |
| 1000 | EXPORT_SYMBOL_GPL(ip_conntrack_helper_find_get); |
| 1001 | EXPORT_SYMBOL_GPL(ip_conntrack_helper_put); |
| 1002 | EXPORT_SYMBOL_GPL(__ip_conntrack_helper_find_byname); |
| 1003 | |
| 1004 | EXPORT_SYMBOL_GPL(ip_conntrack_proto_find_get); |
| 1005 | EXPORT_SYMBOL_GPL(ip_conntrack_proto_put); |
| 1006 | EXPORT_SYMBOL_GPL(__ip_conntrack_proto_find); |
| 1007 | #if defined(CONFIG_IP_NF_CONNTRACK_NETLINK) || \ |
| 1008 | defined(CONFIG_IP_NF_CONNTRACK_NETLINK_MODULE) |
| 1009 | EXPORT_SYMBOL_GPL(ip_ct_port_tuple_to_nfattr); |
| 1010 | EXPORT_SYMBOL_GPL(ip_ct_port_nfattr_to_tuple); |
| 1011 | #endif |