Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 1 | /* This file contains all the functions required for the standalone |
| 2 | nf_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 | * 16 Dec 2003: Yasuyuki Kozakai @USAGI <yasuyuki.kozakai@toshiba.co.jp> |
| 15 | * - generalize L3 protocol dependent part. |
| 16 | * |
| 17 | * Derived from net/ipv4/netfilter/ip_conntrack_standalone.c |
| 18 | */ |
| 19 | |
| 20 | #include <linux/config.h> |
| 21 | #include <linux/types.h> |
| 22 | #include <linux/netfilter.h> |
| 23 | #include <linux/module.h> |
| 24 | #include <linux/skbuff.h> |
| 25 | #include <linux/proc_fs.h> |
| 26 | #include <linux/seq_file.h> |
| 27 | #include <linux/percpu.h> |
| 28 | #include <linux/netdevice.h> |
| 29 | #ifdef CONFIG_SYSCTL |
| 30 | #include <linux/sysctl.h> |
| 31 | #endif |
| 32 | |
| 33 | #define ASSERT_READ_LOCK(x) |
| 34 | #define ASSERT_WRITE_LOCK(x) |
| 35 | |
| 36 | #include <net/netfilter/nf_conntrack.h> |
| 37 | #include <net/netfilter/nf_conntrack_l3proto.h> |
| 38 | #include <net/netfilter/nf_conntrack_protocol.h> |
| 39 | #include <net/netfilter/nf_conntrack_core.h> |
| 40 | #include <net/netfilter/nf_conntrack_helper.h> |
| 41 | #include <linux/netfilter_ipv4/listhelp.h> |
| 42 | |
| 43 | #if 0 |
| 44 | #define DEBUGP printk |
| 45 | #else |
| 46 | #define DEBUGP(format, args...) |
| 47 | #endif |
| 48 | |
| 49 | MODULE_LICENSE("GPL"); |
| 50 | |
| 51 | extern atomic_t nf_conntrack_count; |
| 52 | DECLARE_PER_CPU(struct ip_conntrack_stat, nf_conntrack_stat); |
| 53 | |
| 54 | static int kill_l3proto(struct nf_conn *i, void *data) |
| 55 | { |
| 56 | return (i->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.l3num == |
| 57 | ((struct nf_conntrack_l3proto *)data)->l3proto); |
| 58 | } |
| 59 | |
| 60 | static int kill_proto(struct nf_conn *i, void *data) |
| 61 | { |
| 62 | struct nf_conntrack_protocol *proto; |
| 63 | proto = (struct nf_conntrack_protocol *)data; |
| 64 | return (i->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.protonum == |
| 65 | proto->proto) && |
| 66 | (i->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.l3num == |
| 67 | proto->l3proto); |
| 68 | } |
| 69 | |
| 70 | #ifdef CONFIG_PROC_FS |
| 71 | static int |
| 72 | print_tuple(struct seq_file *s, const struct nf_conntrack_tuple *tuple, |
| 73 | struct nf_conntrack_l3proto *l3proto, |
| 74 | struct nf_conntrack_protocol *proto) |
| 75 | { |
| 76 | return l3proto->print_tuple(s, tuple) || proto->print_tuple(s, tuple); |
| 77 | } |
| 78 | |
| 79 | #ifdef CONFIG_NF_CT_ACCT |
| 80 | static unsigned int |
| 81 | seq_print_counters(struct seq_file *s, |
| 82 | const struct ip_conntrack_counter *counter) |
| 83 | { |
| 84 | return seq_printf(s, "packets=%llu bytes=%llu ", |
| 85 | (unsigned long long)counter->packets, |
| 86 | (unsigned long long)counter->bytes); |
| 87 | } |
| 88 | #else |
| 89 | #define seq_print_counters(x, y) 0 |
| 90 | #endif |
| 91 | |
| 92 | struct ct_iter_state { |
| 93 | unsigned int bucket; |
| 94 | }; |
| 95 | |
| 96 | static struct list_head *ct_get_first(struct seq_file *seq) |
| 97 | { |
| 98 | struct ct_iter_state *st = seq->private; |
| 99 | |
| 100 | for (st->bucket = 0; |
| 101 | st->bucket < nf_conntrack_htable_size; |
| 102 | st->bucket++) { |
| 103 | if (!list_empty(&nf_conntrack_hash[st->bucket])) |
| 104 | return nf_conntrack_hash[st->bucket].next; |
| 105 | } |
| 106 | return NULL; |
| 107 | } |
| 108 | |
| 109 | static struct list_head *ct_get_next(struct seq_file *seq, struct list_head *head) |
| 110 | { |
| 111 | struct ct_iter_state *st = seq->private; |
| 112 | |
| 113 | head = head->next; |
| 114 | while (head == &nf_conntrack_hash[st->bucket]) { |
| 115 | if (++st->bucket >= nf_conntrack_htable_size) |
| 116 | return NULL; |
| 117 | head = nf_conntrack_hash[st->bucket].next; |
| 118 | } |
| 119 | return head; |
| 120 | } |
| 121 | |
| 122 | static struct list_head *ct_get_idx(struct seq_file *seq, loff_t pos) |
| 123 | { |
| 124 | struct list_head *head = ct_get_first(seq); |
| 125 | |
| 126 | if (head) |
| 127 | while (pos && (head = ct_get_next(seq, head))) |
| 128 | pos--; |
| 129 | return pos ? NULL : head; |
| 130 | } |
| 131 | |
| 132 | static void *ct_seq_start(struct seq_file *seq, loff_t *pos) |
| 133 | { |
| 134 | read_lock_bh(&nf_conntrack_lock); |
| 135 | return ct_get_idx(seq, *pos); |
| 136 | } |
| 137 | |
| 138 | static void *ct_seq_next(struct seq_file *s, void *v, loff_t *pos) |
| 139 | { |
| 140 | (*pos)++; |
| 141 | return ct_get_next(s, v); |
| 142 | } |
| 143 | |
| 144 | static void ct_seq_stop(struct seq_file *s, void *v) |
| 145 | { |
| 146 | read_unlock_bh(&nf_conntrack_lock); |
| 147 | } |
| 148 | |
| 149 | /* return 0 on success, 1 in case of error */ |
| 150 | static int ct_seq_show(struct seq_file *s, void *v) |
| 151 | { |
| 152 | const struct nf_conntrack_tuple_hash *hash = v; |
| 153 | const struct nf_conn *conntrack = nf_ct_tuplehash_to_ctrack(hash); |
| 154 | struct nf_conntrack_l3proto *l3proto; |
| 155 | struct nf_conntrack_protocol *proto; |
| 156 | |
| 157 | ASSERT_READ_LOCK(&nf_conntrack_lock); |
| 158 | NF_CT_ASSERT(conntrack); |
| 159 | |
| 160 | /* we only want to print DIR_ORIGINAL */ |
| 161 | if (NF_CT_DIRECTION(hash)) |
| 162 | return 0; |
| 163 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 164 | l3proto = __nf_ct_l3proto_find(conntrack->tuplehash[IP_CT_DIR_ORIGINAL] |
| 165 | .tuple.src.l3num); |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 166 | |
| 167 | NF_CT_ASSERT(l3proto); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 168 | proto = __nf_ct_proto_find(conntrack->tuplehash[IP_CT_DIR_ORIGINAL] |
| 169 | .tuple.src.l3num, |
| 170 | conntrack->tuplehash[IP_CT_DIR_ORIGINAL] |
| 171 | .tuple.dst.protonum); |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 172 | NF_CT_ASSERT(proto); |
| 173 | |
| 174 | if (seq_printf(s, "%-8s %u %-8s %u %ld ", |
| 175 | l3proto->name, |
| 176 | conntrack->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.l3num, |
| 177 | proto->name, |
| 178 | conntrack->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.protonum, |
| 179 | timer_pending(&conntrack->timeout) |
| 180 | ? (long)(conntrack->timeout.expires - jiffies)/HZ : 0) != 0) |
| 181 | return -ENOSPC; |
| 182 | |
| 183 | if (l3proto->print_conntrack(s, conntrack)) |
| 184 | return -ENOSPC; |
| 185 | |
| 186 | if (proto->print_conntrack(s, conntrack)) |
| 187 | return -ENOSPC; |
| 188 | |
| 189 | if (print_tuple(s, &conntrack->tuplehash[IP_CT_DIR_ORIGINAL].tuple, |
| 190 | l3proto, proto)) |
| 191 | return -ENOSPC; |
| 192 | |
| 193 | if (seq_print_counters(s, &conntrack->counters[IP_CT_DIR_ORIGINAL])) |
| 194 | return -ENOSPC; |
| 195 | |
| 196 | if (!(test_bit(IPS_SEEN_REPLY_BIT, &conntrack->status))) |
| 197 | if (seq_printf(s, "[UNREPLIED] ")) |
| 198 | return -ENOSPC; |
| 199 | |
| 200 | if (print_tuple(s, &conntrack->tuplehash[IP_CT_DIR_REPLY].tuple, |
| 201 | l3proto, proto)) |
| 202 | return -ENOSPC; |
| 203 | |
| 204 | if (seq_print_counters(s, &conntrack->counters[IP_CT_DIR_REPLY])) |
| 205 | return -ENOSPC; |
| 206 | |
| 207 | if (test_bit(IPS_ASSURED_BIT, &conntrack->status)) |
| 208 | if (seq_printf(s, "[ASSURED] ")) |
| 209 | return -ENOSPC; |
| 210 | |
| 211 | #if defined(CONFIG_NF_CONNTRACK_MARK) |
| 212 | if (seq_printf(s, "mark=%u ", conntrack->mark)) |
| 213 | return -ENOSPC; |
| 214 | #endif |
| 215 | |
| 216 | if (seq_printf(s, "use=%u\n", atomic_read(&conntrack->ct_general.use))) |
| 217 | return -ENOSPC; |
| 218 | |
| 219 | return 0; |
| 220 | } |
| 221 | |
| 222 | static struct seq_operations ct_seq_ops = { |
| 223 | .start = ct_seq_start, |
| 224 | .next = ct_seq_next, |
| 225 | .stop = ct_seq_stop, |
| 226 | .show = ct_seq_show |
| 227 | }; |
| 228 | |
| 229 | static int ct_open(struct inode *inode, struct file *file) |
| 230 | { |
| 231 | struct seq_file *seq; |
| 232 | struct ct_iter_state *st; |
| 233 | int ret; |
| 234 | |
| 235 | st = kmalloc(sizeof(struct ct_iter_state), GFP_KERNEL); |
| 236 | if (st == NULL) |
| 237 | return -ENOMEM; |
| 238 | ret = seq_open(file, &ct_seq_ops); |
| 239 | if (ret) |
| 240 | goto out_free; |
| 241 | seq = file->private_data; |
| 242 | seq->private = st; |
| 243 | memset(st, 0, sizeof(struct ct_iter_state)); |
| 244 | return ret; |
| 245 | out_free: |
| 246 | kfree(st); |
| 247 | return ret; |
| 248 | } |
| 249 | |
| 250 | static struct file_operations ct_file_ops = { |
| 251 | .owner = THIS_MODULE, |
| 252 | .open = ct_open, |
| 253 | .read = seq_read, |
| 254 | .llseek = seq_lseek, |
| 255 | .release = seq_release_private, |
| 256 | }; |
| 257 | |
| 258 | /* expects */ |
| 259 | static void *exp_seq_start(struct seq_file *s, loff_t *pos) |
| 260 | { |
| 261 | struct list_head *e = &nf_conntrack_expect_list; |
| 262 | loff_t i; |
| 263 | |
| 264 | /* strange seq_file api calls stop even if we fail, |
| 265 | * thus we need to grab lock since stop unlocks */ |
| 266 | read_lock_bh(&nf_conntrack_lock); |
| 267 | |
| 268 | if (list_empty(e)) |
| 269 | return NULL; |
| 270 | |
| 271 | for (i = 0; i <= *pos; i++) { |
| 272 | e = e->next; |
| 273 | if (e == &nf_conntrack_expect_list) |
| 274 | return NULL; |
| 275 | } |
| 276 | return e; |
| 277 | } |
| 278 | |
| 279 | static void *exp_seq_next(struct seq_file *s, void *v, loff_t *pos) |
| 280 | { |
| 281 | struct list_head *e = v; |
| 282 | |
| 283 | ++*pos; |
| 284 | e = e->next; |
| 285 | |
| 286 | if (e == &nf_conntrack_expect_list) |
| 287 | return NULL; |
| 288 | |
| 289 | return e; |
| 290 | } |
| 291 | |
| 292 | static void exp_seq_stop(struct seq_file *s, void *v) |
| 293 | { |
| 294 | read_unlock_bh(&nf_conntrack_lock); |
| 295 | } |
| 296 | |
| 297 | static int exp_seq_show(struct seq_file *s, void *v) |
| 298 | { |
| 299 | struct nf_conntrack_expect *expect = v; |
| 300 | |
| 301 | if (expect->timeout.function) |
| 302 | seq_printf(s, "%ld ", timer_pending(&expect->timeout) |
| 303 | ? (long)(expect->timeout.expires - jiffies)/HZ : 0); |
| 304 | else |
| 305 | seq_printf(s, "- "); |
| 306 | seq_printf(s, "l3proto = %u proto=%u ", |
| 307 | expect->tuple.src.l3num, |
| 308 | expect->tuple.dst.protonum); |
| 309 | print_tuple(s, &expect->tuple, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 310 | __nf_ct_l3proto_find(expect->tuple.src.l3num), |
| 311 | __nf_ct_proto_find(expect->tuple.src.l3num, |
| 312 | expect->tuple.dst.protonum)); |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 313 | return seq_putc(s, '\n'); |
| 314 | } |
| 315 | |
| 316 | static struct seq_operations exp_seq_ops = { |
| 317 | .start = exp_seq_start, |
| 318 | .next = exp_seq_next, |
| 319 | .stop = exp_seq_stop, |
| 320 | .show = exp_seq_show |
| 321 | }; |
| 322 | |
| 323 | static int exp_open(struct inode *inode, struct file *file) |
| 324 | { |
| 325 | return seq_open(file, &exp_seq_ops); |
| 326 | } |
| 327 | |
| 328 | static struct file_operations exp_file_ops = { |
| 329 | .owner = THIS_MODULE, |
| 330 | .open = exp_open, |
| 331 | .read = seq_read, |
| 332 | .llseek = seq_lseek, |
| 333 | .release = seq_release |
| 334 | }; |
| 335 | |
| 336 | static void *ct_cpu_seq_start(struct seq_file *seq, loff_t *pos) |
| 337 | { |
| 338 | int cpu; |
| 339 | |
| 340 | if (*pos == 0) |
| 341 | return SEQ_START_TOKEN; |
| 342 | |
| 343 | for (cpu = *pos-1; cpu < NR_CPUS; ++cpu) { |
| 344 | if (!cpu_possible(cpu)) |
| 345 | continue; |
| 346 | *pos = cpu + 1; |
| 347 | return &per_cpu(nf_conntrack_stat, cpu); |
| 348 | } |
| 349 | |
| 350 | return NULL; |
| 351 | } |
| 352 | |
| 353 | static void *ct_cpu_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
| 354 | { |
| 355 | int cpu; |
| 356 | |
| 357 | for (cpu = *pos; cpu < NR_CPUS; ++cpu) { |
| 358 | if (!cpu_possible(cpu)) |
| 359 | continue; |
| 360 | *pos = cpu + 1; |
| 361 | return &per_cpu(nf_conntrack_stat, cpu); |
| 362 | } |
| 363 | |
| 364 | return NULL; |
| 365 | } |
| 366 | |
| 367 | static void ct_cpu_seq_stop(struct seq_file *seq, void *v) |
| 368 | { |
| 369 | } |
| 370 | |
| 371 | static int ct_cpu_seq_show(struct seq_file *seq, void *v) |
| 372 | { |
| 373 | unsigned int nr_conntracks = atomic_read(&nf_conntrack_count); |
| 374 | struct ip_conntrack_stat *st = v; |
| 375 | |
| 376 | if (v == SEQ_START_TOKEN) { |
| 377 | 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"); |
| 378 | return 0; |
| 379 | } |
| 380 | |
| 381 | seq_printf(seq, "%08x %08x %08x %08x %08x %08x %08x %08x " |
| 382 | "%08x %08x %08x %08x %08x %08x %08x %08x \n", |
| 383 | nr_conntracks, |
| 384 | st->searched, |
| 385 | st->found, |
| 386 | st->new, |
| 387 | st->invalid, |
| 388 | st->ignore, |
| 389 | st->delete, |
| 390 | st->delete_list, |
| 391 | st->insert, |
| 392 | st->insert_failed, |
| 393 | st->drop, |
| 394 | st->early_drop, |
| 395 | st->error, |
| 396 | |
| 397 | st->expect_new, |
| 398 | st->expect_create, |
| 399 | st->expect_delete |
| 400 | ); |
| 401 | return 0; |
| 402 | } |
| 403 | |
| 404 | static struct seq_operations ct_cpu_seq_ops = { |
| 405 | .start = ct_cpu_seq_start, |
| 406 | .next = ct_cpu_seq_next, |
| 407 | .stop = ct_cpu_seq_stop, |
| 408 | .show = ct_cpu_seq_show, |
| 409 | }; |
| 410 | |
| 411 | static int ct_cpu_seq_open(struct inode *inode, struct file *file) |
| 412 | { |
| 413 | return seq_open(file, &ct_cpu_seq_ops); |
| 414 | } |
| 415 | |
| 416 | static struct file_operations ct_cpu_seq_fops = { |
| 417 | .owner = THIS_MODULE, |
| 418 | .open = ct_cpu_seq_open, |
| 419 | .read = seq_read, |
| 420 | .llseek = seq_lseek, |
| 421 | .release = seq_release_private, |
| 422 | }; |
| 423 | #endif /* CONFIG_PROC_FS */ |
| 424 | |
| 425 | /* Sysctl support */ |
| 426 | |
| 427 | #ifdef CONFIG_SYSCTL |
| 428 | |
| 429 | /* From nf_conntrack_core.c */ |
| 430 | extern int nf_conntrack_max; |
| 431 | extern unsigned int nf_conntrack_htable_size; |
| 432 | |
| 433 | /* From nf_conntrack_proto_tcp.c */ |
Patrick McHardy | babbdb1 | 2006-01-09 17:48:09 -0800 | [diff] [blame] | 434 | extern unsigned int nf_ct_tcp_timeout_syn_sent; |
| 435 | extern unsigned int nf_ct_tcp_timeout_syn_recv; |
| 436 | extern unsigned int nf_ct_tcp_timeout_established; |
| 437 | extern unsigned int nf_ct_tcp_timeout_fin_wait; |
| 438 | extern unsigned int nf_ct_tcp_timeout_close_wait; |
| 439 | extern unsigned int nf_ct_tcp_timeout_last_ack; |
| 440 | extern unsigned int nf_ct_tcp_timeout_time_wait; |
| 441 | extern unsigned int nf_ct_tcp_timeout_close; |
| 442 | extern unsigned int nf_ct_tcp_timeout_max_retrans; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 443 | extern int nf_ct_tcp_loose; |
| 444 | extern int nf_ct_tcp_be_liberal; |
| 445 | extern int nf_ct_tcp_max_retrans; |
| 446 | |
| 447 | /* From nf_conntrack_proto_udp.c */ |
Patrick McHardy | babbdb1 | 2006-01-09 17:48:09 -0800 | [diff] [blame] | 448 | extern unsigned int nf_ct_udp_timeout; |
| 449 | extern unsigned int nf_ct_udp_timeout_stream; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 450 | |
| 451 | /* From nf_conntrack_proto_generic.c */ |
Patrick McHardy | babbdb1 | 2006-01-09 17:48:09 -0800 | [diff] [blame] | 452 | extern unsigned int nf_ct_generic_timeout; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 453 | |
| 454 | /* Log invalid packets of a given protocol */ |
| 455 | static int log_invalid_proto_min = 0; |
| 456 | static int log_invalid_proto_max = 255; |
| 457 | |
| 458 | static struct ctl_table_header *nf_ct_sysctl_header; |
| 459 | |
| 460 | static ctl_table nf_ct_sysctl_table[] = { |
| 461 | { |
| 462 | .ctl_name = NET_NF_CONNTRACK_MAX, |
| 463 | .procname = "nf_conntrack_max", |
| 464 | .data = &nf_conntrack_max, |
| 465 | .maxlen = sizeof(int), |
| 466 | .mode = 0644, |
| 467 | .proc_handler = &proc_dointvec, |
| 468 | }, |
| 469 | { |
| 470 | .ctl_name = NET_NF_CONNTRACK_COUNT, |
| 471 | .procname = "nf_conntrack_count", |
| 472 | .data = &nf_conntrack_count, |
| 473 | .maxlen = sizeof(int), |
| 474 | .mode = 0444, |
| 475 | .proc_handler = &proc_dointvec, |
| 476 | }, |
| 477 | { |
| 478 | .ctl_name = NET_NF_CONNTRACK_BUCKETS, |
| 479 | .procname = "nf_conntrack_buckets", |
| 480 | .data = &nf_conntrack_htable_size, |
| 481 | .maxlen = sizeof(unsigned int), |
| 482 | .mode = 0444, |
| 483 | .proc_handler = &proc_dointvec, |
| 484 | }, |
| 485 | { |
| 486 | .ctl_name = NET_NF_CONNTRACK_TCP_TIMEOUT_SYN_SENT, |
| 487 | .procname = "nf_conntrack_tcp_timeout_syn_sent", |
| 488 | .data = &nf_ct_tcp_timeout_syn_sent, |
| 489 | .maxlen = sizeof(unsigned int), |
| 490 | .mode = 0644, |
| 491 | .proc_handler = &proc_dointvec_jiffies, |
| 492 | }, |
| 493 | { |
| 494 | .ctl_name = NET_NF_CONNTRACK_TCP_TIMEOUT_SYN_RECV, |
| 495 | .procname = "nf_conntrack_tcp_timeout_syn_recv", |
| 496 | .data = &nf_ct_tcp_timeout_syn_recv, |
| 497 | .maxlen = sizeof(unsigned int), |
| 498 | .mode = 0644, |
| 499 | .proc_handler = &proc_dointvec_jiffies, |
| 500 | }, |
| 501 | { |
| 502 | .ctl_name = NET_NF_CONNTRACK_TCP_TIMEOUT_ESTABLISHED, |
| 503 | .procname = "nf_conntrack_tcp_timeout_established", |
| 504 | .data = &nf_ct_tcp_timeout_established, |
| 505 | .maxlen = sizeof(unsigned int), |
| 506 | .mode = 0644, |
| 507 | .proc_handler = &proc_dointvec_jiffies, |
| 508 | }, |
| 509 | { |
| 510 | .ctl_name = NET_NF_CONNTRACK_TCP_TIMEOUT_FIN_WAIT, |
| 511 | .procname = "nf_conntrack_tcp_timeout_fin_wait", |
| 512 | .data = &nf_ct_tcp_timeout_fin_wait, |
| 513 | .maxlen = sizeof(unsigned int), |
| 514 | .mode = 0644, |
| 515 | .proc_handler = &proc_dointvec_jiffies, |
| 516 | }, |
| 517 | { |
| 518 | .ctl_name = NET_NF_CONNTRACK_TCP_TIMEOUT_CLOSE_WAIT, |
| 519 | .procname = "nf_conntrack_tcp_timeout_close_wait", |
| 520 | .data = &nf_ct_tcp_timeout_close_wait, |
| 521 | .maxlen = sizeof(unsigned int), |
| 522 | .mode = 0644, |
| 523 | .proc_handler = &proc_dointvec_jiffies, |
| 524 | }, |
| 525 | { |
| 526 | .ctl_name = NET_NF_CONNTRACK_TCP_TIMEOUT_LAST_ACK, |
| 527 | .procname = "nf_conntrack_tcp_timeout_last_ack", |
| 528 | .data = &nf_ct_tcp_timeout_last_ack, |
| 529 | .maxlen = sizeof(unsigned int), |
| 530 | .mode = 0644, |
| 531 | .proc_handler = &proc_dointvec_jiffies, |
| 532 | }, |
| 533 | { |
| 534 | .ctl_name = NET_NF_CONNTRACK_TCP_TIMEOUT_TIME_WAIT, |
| 535 | .procname = "nf_conntrack_tcp_timeout_time_wait", |
| 536 | .data = &nf_ct_tcp_timeout_time_wait, |
| 537 | .maxlen = sizeof(unsigned int), |
| 538 | .mode = 0644, |
| 539 | .proc_handler = &proc_dointvec_jiffies, |
| 540 | }, |
| 541 | { |
| 542 | .ctl_name = NET_NF_CONNTRACK_TCP_TIMEOUT_CLOSE, |
| 543 | .procname = "nf_conntrack_tcp_timeout_close", |
| 544 | .data = &nf_ct_tcp_timeout_close, |
| 545 | .maxlen = sizeof(unsigned int), |
| 546 | .mode = 0644, |
| 547 | .proc_handler = &proc_dointvec_jiffies, |
| 548 | }, |
| 549 | { |
| 550 | .ctl_name = NET_NF_CONNTRACK_UDP_TIMEOUT, |
| 551 | .procname = "nf_conntrack_udp_timeout", |
| 552 | .data = &nf_ct_udp_timeout, |
| 553 | .maxlen = sizeof(unsigned int), |
| 554 | .mode = 0644, |
| 555 | .proc_handler = &proc_dointvec_jiffies, |
| 556 | }, |
| 557 | { |
| 558 | .ctl_name = NET_NF_CONNTRACK_UDP_TIMEOUT_STREAM, |
| 559 | .procname = "nf_conntrack_udp_timeout_stream", |
| 560 | .data = &nf_ct_udp_timeout_stream, |
| 561 | .maxlen = sizeof(unsigned int), |
| 562 | .mode = 0644, |
| 563 | .proc_handler = &proc_dointvec_jiffies, |
| 564 | }, |
| 565 | { |
| 566 | .ctl_name = NET_NF_CONNTRACK_GENERIC_TIMEOUT, |
| 567 | .procname = "nf_conntrack_generic_timeout", |
| 568 | .data = &nf_ct_generic_timeout, |
| 569 | .maxlen = sizeof(unsigned int), |
| 570 | .mode = 0644, |
| 571 | .proc_handler = &proc_dointvec_jiffies, |
| 572 | }, |
| 573 | { |
| 574 | .ctl_name = NET_NF_CONNTRACK_LOG_INVALID, |
| 575 | .procname = "nf_conntrack_log_invalid", |
| 576 | .data = &nf_ct_log_invalid, |
| 577 | .maxlen = sizeof(unsigned int), |
| 578 | .mode = 0644, |
| 579 | .proc_handler = &proc_dointvec_minmax, |
| 580 | .strategy = &sysctl_intvec, |
| 581 | .extra1 = &log_invalid_proto_min, |
| 582 | .extra2 = &log_invalid_proto_max, |
| 583 | }, |
| 584 | { |
| 585 | .ctl_name = NET_NF_CONNTRACK_TCP_TIMEOUT_MAX_RETRANS, |
| 586 | .procname = "nf_conntrack_tcp_timeout_max_retrans", |
| 587 | .data = &nf_ct_tcp_timeout_max_retrans, |
| 588 | .maxlen = sizeof(unsigned int), |
| 589 | .mode = 0644, |
| 590 | .proc_handler = &proc_dointvec_jiffies, |
| 591 | }, |
| 592 | { |
| 593 | .ctl_name = NET_NF_CONNTRACK_TCP_LOOSE, |
| 594 | .procname = "nf_conntrack_tcp_loose", |
| 595 | .data = &nf_ct_tcp_loose, |
| 596 | .maxlen = sizeof(unsigned int), |
| 597 | .mode = 0644, |
| 598 | .proc_handler = &proc_dointvec, |
| 599 | }, |
| 600 | { |
| 601 | .ctl_name = NET_NF_CONNTRACK_TCP_BE_LIBERAL, |
| 602 | .procname = "nf_conntrack_tcp_be_liberal", |
| 603 | .data = &nf_ct_tcp_be_liberal, |
| 604 | .maxlen = sizeof(unsigned int), |
| 605 | .mode = 0644, |
| 606 | .proc_handler = &proc_dointvec, |
| 607 | }, |
| 608 | { |
| 609 | .ctl_name = NET_NF_CONNTRACK_TCP_MAX_RETRANS, |
| 610 | .procname = "nf_conntrack_tcp_max_retrans", |
| 611 | .data = &nf_ct_tcp_max_retrans, |
| 612 | .maxlen = sizeof(unsigned int), |
| 613 | .mode = 0644, |
| 614 | .proc_handler = &proc_dointvec, |
| 615 | }, |
| 616 | |
| 617 | { .ctl_name = 0 } |
| 618 | }; |
| 619 | |
| 620 | #define NET_NF_CONNTRACK_MAX 2089 |
| 621 | |
| 622 | static ctl_table nf_ct_netfilter_table[] = { |
| 623 | { |
| 624 | .ctl_name = NET_NETFILTER, |
| 625 | .procname = "netfilter", |
| 626 | .mode = 0555, |
| 627 | .child = nf_ct_sysctl_table, |
| 628 | }, |
| 629 | { |
| 630 | .ctl_name = NET_NF_CONNTRACK_MAX, |
| 631 | .procname = "nf_conntrack_max", |
| 632 | .data = &nf_conntrack_max, |
| 633 | .maxlen = sizeof(int), |
| 634 | .mode = 0644, |
| 635 | .proc_handler = &proc_dointvec, |
| 636 | }, |
| 637 | { .ctl_name = 0 } |
| 638 | }; |
| 639 | |
| 640 | static ctl_table nf_ct_net_table[] = { |
| 641 | { |
| 642 | .ctl_name = CTL_NET, |
| 643 | .procname = "net", |
| 644 | .mode = 0555, |
| 645 | .child = nf_ct_netfilter_table, |
| 646 | }, |
| 647 | { .ctl_name = 0 } |
| 648 | }; |
| 649 | EXPORT_SYMBOL(nf_ct_log_invalid); |
| 650 | #endif /* CONFIG_SYSCTL */ |
| 651 | |
| 652 | static int init_or_cleanup(int init) |
| 653 | { |
| 654 | #ifdef CONFIG_PROC_FS |
| 655 | struct proc_dir_entry *proc, *proc_exp, *proc_stat; |
| 656 | #endif |
| 657 | int ret = 0; |
| 658 | |
| 659 | if (!init) goto cleanup; |
| 660 | |
| 661 | ret = nf_conntrack_init(); |
| 662 | if (ret < 0) |
| 663 | goto cleanup_nothing; |
| 664 | |
| 665 | #ifdef CONFIG_PROC_FS |
| 666 | proc = proc_net_fops_create("nf_conntrack", 0440, &ct_file_ops); |
| 667 | if (!proc) goto cleanup_init; |
| 668 | |
| 669 | proc_exp = proc_net_fops_create("nf_conntrack_expect", 0440, |
| 670 | &exp_file_ops); |
| 671 | if (!proc_exp) goto cleanup_proc; |
| 672 | |
| 673 | proc_stat = create_proc_entry("nf_conntrack", S_IRUGO, proc_net_stat); |
| 674 | if (!proc_stat) |
| 675 | goto cleanup_proc_exp; |
| 676 | |
| 677 | proc_stat->proc_fops = &ct_cpu_seq_fops; |
| 678 | proc_stat->owner = THIS_MODULE; |
| 679 | #endif |
| 680 | #ifdef CONFIG_SYSCTL |
| 681 | nf_ct_sysctl_header = register_sysctl_table(nf_ct_net_table, 0); |
| 682 | if (nf_ct_sysctl_header == NULL) { |
| 683 | printk("nf_conntrack: can't register to sysctl.\n"); |
| 684 | ret = -ENOMEM; |
| 685 | goto cleanup_proc_stat; |
| 686 | } |
| 687 | #endif |
| 688 | |
| 689 | return ret; |
| 690 | |
| 691 | cleanup: |
| 692 | #ifdef CONFIG_SYSCTL |
| 693 | unregister_sysctl_table(nf_ct_sysctl_header); |
| 694 | cleanup_proc_stat: |
| 695 | #endif |
| 696 | #ifdef CONFIG_PROC_FS |
KOVACS Krisztian | 9647937 | 2005-11-15 16:47:09 -0800 | [diff] [blame] | 697 | remove_proc_entry("nf_conntrack", proc_net_stat); |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 698 | cleanup_proc_exp: |
| 699 | proc_net_remove("nf_conntrack_expect"); |
| 700 | cleanup_proc: |
| 701 | proc_net_remove("nf_conntrack"); |
| 702 | cleanup_init: |
| 703 | #endif /* CNFIG_PROC_FS */ |
| 704 | nf_conntrack_cleanup(); |
| 705 | cleanup_nothing: |
| 706 | return ret; |
| 707 | } |
| 708 | |
| 709 | int nf_conntrack_l3proto_register(struct nf_conntrack_l3proto *proto) |
| 710 | { |
| 711 | int ret = 0; |
| 712 | |
| 713 | write_lock_bh(&nf_conntrack_lock); |
| 714 | if (nf_ct_l3protos[proto->l3proto] != &nf_conntrack_generic_l3proto) { |
| 715 | ret = -EBUSY; |
| 716 | goto out; |
| 717 | } |
| 718 | nf_ct_l3protos[proto->l3proto] = proto; |
| 719 | out: |
| 720 | write_unlock_bh(&nf_conntrack_lock); |
| 721 | |
| 722 | return ret; |
| 723 | } |
| 724 | |
| 725 | void nf_conntrack_l3proto_unregister(struct nf_conntrack_l3proto *proto) |
| 726 | { |
| 727 | write_lock_bh(&nf_conntrack_lock); |
| 728 | nf_ct_l3protos[proto->l3proto] = &nf_conntrack_generic_l3proto; |
| 729 | write_unlock_bh(&nf_conntrack_lock); |
| 730 | |
| 731 | /* Somebody could be still looking at the proto in bh. */ |
| 732 | synchronize_net(); |
| 733 | |
| 734 | /* Remove all contrack entries for this protocol */ |
| 735 | nf_ct_iterate_cleanup(kill_l3proto, proto); |
| 736 | } |
| 737 | |
| 738 | /* FIXME: Allow NULL functions and sub in pointers to generic for |
| 739 | them. --RR */ |
| 740 | int nf_conntrack_protocol_register(struct nf_conntrack_protocol *proto) |
| 741 | { |
| 742 | int ret = 0; |
| 743 | |
| 744 | retry: |
| 745 | write_lock_bh(&nf_conntrack_lock); |
| 746 | if (nf_ct_protos[proto->l3proto]) { |
| 747 | if (nf_ct_protos[proto->l3proto][proto->proto] |
| 748 | != &nf_conntrack_generic_protocol) { |
| 749 | ret = -EBUSY; |
| 750 | goto out_unlock; |
| 751 | } |
| 752 | } else { |
| 753 | /* l3proto may be loaded latter. */ |
| 754 | struct nf_conntrack_protocol **proto_array; |
| 755 | int i; |
| 756 | |
| 757 | write_unlock_bh(&nf_conntrack_lock); |
| 758 | |
| 759 | proto_array = (struct nf_conntrack_protocol **) |
| 760 | kmalloc(MAX_NF_CT_PROTO * |
| 761 | sizeof(struct nf_conntrack_protocol *), |
| 762 | GFP_KERNEL); |
| 763 | if (proto_array == NULL) { |
| 764 | ret = -ENOMEM; |
| 765 | goto out; |
| 766 | } |
| 767 | for (i = 0; i < MAX_NF_CT_PROTO; i++) |
| 768 | proto_array[i] = &nf_conntrack_generic_protocol; |
| 769 | |
| 770 | write_lock_bh(&nf_conntrack_lock); |
| 771 | if (nf_ct_protos[proto->l3proto]) { |
| 772 | /* bad timing, but no problem */ |
| 773 | write_unlock_bh(&nf_conntrack_lock); |
| 774 | kfree(proto_array); |
| 775 | } else { |
| 776 | nf_ct_protos[proto->l3proto] = proto_array; |
| 777 | write_unlock_bh(&nf_conntrack_lock); |
| 778 | } |
| 779 | |
| 780 | /* |
| 781 | * Just once because array is never freed until unloading |
| 782 | * nf_conntrack.ko |
| 783 | */ |
| 784 | goto retry; |
| 785 | } |
| 786 | |
| 787 | nf_ct_protos[proto->l3proto][proto->proto] = proto; |
| 788 | |
| 789 | out_unlock: |
| 790 | write_unlock_bh(&nf_conntrack_lock); |
| 791 | out: |
| 792 | return ret; |
| 793 | } |
| 794 | |
| 795 | void nf_conntrack_protocol_unregister(struct nf_conntrack_protocol *proto) |
| 796 | { |
| 797 | write_lock_bh(&nf_conntrack_lock); |
| 798 | nf_ct_protos[proto->l3proto][proto->proto] |
| 799 | = &nf_conntrack_generic_protocol; |
| 800 | write_unlock_bh(&nf_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 | nf_ct_iterate_cleanup(kill_proto, proto); |
| 807 | } |
| 808 | |
| 809 | static int __init init(void) |
| 810 | { |
| 811 | return init_or_cleanup(1); |
| 812 | } |
| 813 | |
| 814 | static void __exit fini(void) |
| 815 | { |
| 816 | init_or_cleanup(0); |
| 817 | } |
| 818 | |
| 819 | module_init(init); |
| 820 | module_exit(fini); |
| 821 | |
| 822 | /* Some modules need us, but don't depend directly on any symbol. |
| 823 | They should call this. */ |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame^] | 824 | void need_conntrack(void) |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 825 | { |
| 826 | } |
| 827 | |
| 828 | #ifdef CONFIG_NF_CONNTRACK_EVENTS |
| 829 | EXPORT_SYMBOL_GPL(nf_conntrack_chain); |
| 830 | EXPORT_SYMBOL_GPL(nf_conntrack_expect_chain); |
| 831 | EXPORT_SYMBOL_GPL(nf_conntrack_register_notifier); |
| 832 | EXPORT_SYMBOL_GPL(nf_conntrack_unregister_notifier); |
| 833 | EXPORT_SYMBOL_GPL(__nf_ct_event_cache_init); |
| 834 | EXPORT_PER_CPU_SYMBOL_GPL(nf_conntrack_ecache); |
| 835 | EXPORT_SYMBOL_GPL(nf_ct_deliver_cached_events); |
| 836 | #endif |
| 837 | EXPORT_SYMBOL(nf_conntrack_l3proto_register); |
| 838 | EXPORT_SYMBOL(nf_conntrack_l3proto_unregister); |
| 839 | EXPORT_SYMBOL(nf_conntrack_protocol_register); |
| 840 | EXPORT_SYMBOL(nf_conntrack_protocol_unregister); |
| 841 | EXPORT_SYMBOL(nf_ct_invert_tuplepr); |
| 842 | EXPORT_SYMBOL(nf_conntrack_alter_reply); |
| 843 | EXPORT_SYMBOL(nf_conntrack_destroyed); |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame^] | 844 | EXPORT_SYMBOL(need_conntrack); |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 845 | EXPORT_SYMBOL(nf_conntrack_helper_register); |
| 846 | EXPORT_SYMBOL(nf_conntrack_helper_unregister); |
| 847 | EXPORT_SYMBOL(nf_ct_iterate_cleanup); |
| 848 | EXPORT_SYMBOL(__nf_ct_refresh_acct); |
| 849 | EXPORT_SYMBOL(nf_ct_protos); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 850 | EXPORT_SYMBOL(__nf_ct_proto_find); |
| 851 | EXPORT_SYMBOL(nf_ct_proto_find_get); |
| 852 | EXPORT_SYMBOL(nf_ct_proto_put); |
| 853 | EXPORT_SYMBOL(nf_ct_l3proto_find_get); |
| 854 | EXPORT_SYMBOL(nf_ct_l3proto_put); |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 855 | EXPORT_SYMBOL(nf_ct_l3protos); |
| 856 | EXPORT_SYMBOL(nf_conntrack_expect_alloc); |
| 857 | EXPORT_SYMBOL(nf_conntrack_expect_put); |
| 858 | EXPORT_SYMBOL(nf_conntrack_expect_related); |
| 859 | EXPORT_SYMBOL(nf_conntrack_unexpect_related); |
| 860 | EXPORT_SYMBOL(nf_conntrack_tuple_taken); |
| 861 | EXPORT_SYMBOL(nf_conntrack_htable_size); |
| 862 | EXPORT_SYMBOL(nf_conntrack_lock); |
| 863 | EXPORT_SYMBOL(nf_conntrack_hash); |
| 864 | EXPORT_SYMBOL(nf_conntrack_untracked); |
| 865 | EXPORT_SYMBOL_GPL(nf_conntrack_find_get); |
| 866 | #ifdef CONFIG_IP_NF_NAT_NEEDED |
| 867 | EXPORT_SYMBOL(nf_conntrack_tcp_update); |
| 868 | #endif |
| 869 | EXPORT_SYMBOL(__nf_conntrack_confirm); |
| 870 | EXPORT_SYMBOL(nf_ct_get_tuple); |
| 871 | EXPORT_SYMBOL(nf_ct_invert_tuple); |
| 872 | EXPORT_SYMBOL(nf_conntrack_in); |
| 873 | EXPORT_SYMBOL(__nf_conntrack_attach); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 874 | EXPORT_SYMBOL(nf_conntrack_alloc); |
| 875 | EXPORT_SYMBOL(nf_conntrack_free); |
| 876 | EXPORT_SYMBOL(nf_conntrack_flush); |
| 877 | EXPORT_SYMBOL(nf_ct_remove_expectations); |
| 878 | EXPORT_SYMBOL(nf_ct_helper_find_get); |
| 879 | EXPORT_SYMBOL(nf_ct_helper_put); |
| 880 | EXPORT_SYMBOL(__nf_conntrack_helper_find_byname); |
| 881 | EXPORT_SYMBOL(__nf_conntrack_find); |
| 882 | EXPORT_SYMBOL(nf_ct_unlink_expect); |
| 883 | EXPORT_SYMBOL(nf_conntrack_hash_insert); |
| 884 | EXPORT_SYMBOL(__nf_conntrack_expect_find); |
| 885 | EXPORT_SYMBOL(nf_conntrack_expect_find); |
| 886 | EXPORT_SYMBOL(nf_conntrack_expect_list); |
| 887 | #if defined(CONFIG_NF_CT_NETLINK) || \ |
| 888 | defined(CONFIG_NF_CT_NETLINK_MODULE) |
| 889 | EXPORT_SYMBOL(nf_ct_port_tuple_to_nfattr); |
| 890 | EXPORT_SYMBOL(nf_ct_port_nfattr_to_tuple); |
| 891 | #endif |