net/netfilter/nf_conntrack_standalone.c

   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/types.h>
  21 #include <linux/netfilter.h>
  22 #include <linux/module.h>
  23 #include <linux/skbuff.h>
  24 #include <linux/proc_fs.h>
  25 #include <linux/seq_file.h>
  26 #include <linux/percpu.h>
  27 #include <linux/netdevice.h>
  28 #ifdef CONFIG_SYSCTL
  29 #include <linux/sysctl.h>
  30 #endif
  31
  32 #include <net/netfilter/nf_conntrack.h>
  33 #include <net/netfilter/nf_conntrack_core.h>
  34 #include <net/netfilter/nf_conntrack_l3proto.h>
  35 #include <net/netfilter/nf_conntrack_l4proto.h>
  36 #include <net/netfilter/nf_conntrack_expect.h>
  37 #include <net/netfilter/nf_conntrack_helper.h>
  38
  39 #if 0
  40 #define DEBUGP printk
  41 #else
  42 #define DEBUGP(format, args...)
  43 #endif
  44
  45 MODULE_LICENSE("GPL");
  46
  47 extern atomic_t nf_conntrack_count;
  48 DECLARE_PER_CPU(struct ip_conntrack_stat, nf_conntrack_stat);
  49
  50 #ifdef CONFIG_PROC_FS
  51 int
  52 print_tuple(struct seq_file *s, const struct nf_conntrack_tuple *tuple,
  53             struct nf_conntrack_l3proto *l3proto,
  54             struct nf_conntrack_l4proto *l4proto)
  55 {
  56         return l3proto->print_tuple(s, tuple) || l4proto->print_tuple(s, tuple);
  57 }
  58
  59 #ifdef CONFIG_NF_CT_ACCT
  60 static unsigned int
  61 seq_print_counters(struct seq_file *s,
  62                    const struct ip_conntrack_counter *counter)
  63 {
  64         return seq_printf(s, "packets=%llu bytes=%llu ",
  65                           (unsigned long long)counter->packets,
  66                           (unsigned long long)counter->bytes);
  67 }
  68 #else
  69 #define seq_print_counters(x, y)        0
  70 #endif
  71
  72 struct ct_iter_state {
  73         unsigned int bucket;
  74 };
  75
  76 static struct list_head *ct_get_first(struct seq_file *seq)
  77 {
  78         struct ct_iter_state *st = seq->private;
  79
  80         for (st->bucket = 0;
  81              st->bucket < nf_conntrack_htable_size;
  82              st->bucket++) {
  83                 if (!list_empty(&nf_conntrack_hash[st->bucket]))
  84                         return nf_conntrack_hash[st->bucket].next;
  85         }
  86         return NULL;
  87 }
  88
  89 static struct list_head *ct_get_next(struct seq_file *seq, struct list_head *head)
  90 {
  91         struct ct_iter_state *st = seq->private;
  92
  93         head = head->next;
  94         while (head == &nf_conntrack_hash[st->bucket]) {
  95                 if (++st->bucket >= nf_conntrack_htable_size)
  96                         return NULL;
  97                 head = nf_conntrack_hash[st->bucket].next;
  98         }
  99         return head;
 100 }
 101
 102 static struct list_head *ct_get_idx(struct seq_file *seq, loff_t pos)
 103 {
 104         struct list_head *head = ct_get_first(seq);
 105
 106         if (head)
 107                 while (pos && (head = ct_get_next(seq, head)))
 108                         pos--;
 109         return pos ? NULL : head;
 110 }
 111
 112 static void *ct_seq_start(struct seq_file *seq, loff_t *pos)
 113 {
 114         read_lock_bh(&nf_conntrack_lock);
 115         return ct_get_idx(seq, *pos);
 116 }
 117
 118 static void *ct_seq_next(struct seq_file *s, void *v, loff_t *pos)
 119 {
 120         (*pos)++;
 121         return ct_get_next(s, v);
 122 }
 123
 124 static void ct_seq_stop(struct seq_file *s, void *v)
 125 {
 126         read_unlock_bh(&nf_conntrack_lock);
 127 }
 128
 129 /* return 0 on success, 1 in case of error */
 130 static int ct_seq_show(struct seq_file *s, void *v)
 131 {
 132         const struct nf_conntrack_tuple_hash *hash = v;
 133         const struct nf_conn *conntrack = nf_ct_tuplehash_to_ctrack(hash);
 134         struct nf_conntrack_l3proto *l3proto;
 135         struct nf_conntrack_l4proto *l4proto;
 136
 137         NF_CT_ASSERT(conntrack);
 138
 139         /* we only want to print DIR_ORIGINAL */
 140         if (NF_CT_DIRECTION(hash))
 141                 return 0;
 142
 143         l3proto = __nf_ct_l3proto_find(conntrack->tuplehash[IP_CT_DIR_ORIGINAL]
 144                                        .tuple.src.l3num);
 145
 146         NF_CT_ASSERT(l3proto);
 147         l4proto = __nf_ct_l4proto_find(conntrack->tuplehash[IP_CT_DIR_ORIGINAL]
 148                                    .tuple.src.l3num,
 149                                    conntrack->tuplehash[IP_CT_DIR_ORIGINAL]
 150                                    .tuple.dst.protonum);
 151         NF_CT_ASSERT(l4proto);
 152
 153         if (seq_printf(s, "%-8s %u %-8s %u %ld ",
 154                        l3proto->name,
 155                        conntrack->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.l3num,
 156                        l4proto->name,
 157                        conntrack->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.protonum,
 158                        timer_pending(&conntrack->timeout)
 159                        ? (long)(conntrack->timeout.expires - jiffies)/HZ : 0) != 0)
 160                 return -ENOSPC;
 161
 162         if (l3proto->print_conntrack(s, conntrack))
 163                 return -ENOSPC;
 164
 165         if (l4proto->print_conntrack(s, conntrack))
 166                 return -ENOSPC;
 167
 168         if (print_tuple(s, &conntrack->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
 169                         l3proto, l4proto))
 170                 return -ENOSPC;
 171
 172         if (seq_print_counters(s, &conntrack->counters[IP_CT_DIR_ORIGINAL]))
 173                 return -ENOSPC;
 174
 175         if (!(test_bit(IPS_SEEN_REPLY_BIT, &conntrack->status)))
 176                 if (seq_printf(s, "[UNREPLIED] "))
 177                         return -ENOSPC;
 178
 179         if (print_tuple(s, &conntrack->tuplehash[IP_CT_DIR_REPLY].tuple,
 180                         l3proto, l4proto))
 181                 return -ENOSPC;
 182
 183         if (seq_print_counters(s, &conntrack->counters[IP_CT_DIR_REPLY]))
 184                 return -ENOSPC;
 185
 186         if (test_bit(IPS_ASSURED_BIT, &conntrack->status))
 187                 if (seq_printf(s, "[ASSURED] "))
 188                         return -ENOSPC;
 189
 190 #if defined(CONFIG_NF_CONNTRACK_MARK)
 191         if (seq_printf(s, "mark=%u ", conntrack->mark))
 192                 return -ENOSPC;
 193 #endif
 194
 195 #ifdef CONFIG_NF_CONNTRACK_SECMARK
 196         if (seq_printf(s, "secmark=%u ", conntrack->secmark))
 197                 return -ENOSPC;
 198 #endif
 199
 200         if (seq_printf(s, "use=%u\n", atomic_read(&conntrack->ct_general.use)))
 201                 return -ENOSPC;
 202
 203         return 0;
 204 }
 205
 206 static struct seq_operations ct_seq_ops = {
 207         .start = ct_seq_start,
 208         .next  = ct_seq_next,
 209         .stop  = ct_seq_stop,
 210         .show  = ct_seq_show
 211 };
 212
 213 static int ct_open(struct inode *inode, struct file *file)
 214 {
 215         struct seq_file *seq;
 216         struct ct_iter_state *st;
 217         int ret;
 218
 219         st = kmalloc(sizeof(struct ct_iter_state), GFP_KERNEL);
 220         if (st == NULL)
 221                 return -ENOMEM;
 222         ret = seq_open(file, &ct_seq_ops);
 223         if (ret)
 224                 goto out_free;
 225         seq          = file->private_data;
 226         seq->private = st;
 227         memset(st, 0, sizeof(struct ct_iter_state));
 228         return ret;
 229 out_free:
 230         kfree(st);
 231         return ret;
 232 }
 233
 234 static struct file_operations ct_file_ops = {
 235         .owner   = THIS_MODULE,
 236         .open    = ct_open,
 237         .read    = seq_read,
 238         .llseek  = seq_lseek,
 239         .release = seq_release_private,
 240 };
 241
 242 static void *ct_cpu_seq_start(struct seq_file *seq, loff_t *pos)
 243 {
 244         int cpu;
 245
 246         if (*pos == 0)
 247                 return SEQ_START_TOKEN;
 248
 249         for (cpu = *pos-1; cpu < NR_CPUS; ++cpu) {
 250                 if (!cpu_possible(cpu))
 251                         continue;
 252                 *pos = cpu + 1;
 253                 return &per_cpu(nf_conntrack_stat, cpu);
 254         }
 255
 256         return NULL;
 257 }
 258
 259 static void *ct_cpu_seq_next(struct seq_file *seq, void *v, loff_t *pos)
 260 {
 261         int cpu;
 262
 263         for (cpu = *pos; cpu < NR_CPUS; ++cpu) {
 264                 if (!cpu_possible(cpu))
 265                         continue;
 266                 *pos = cpu + 1;
 267                 return &per_cpu(nf_conntrack_stat, cpu);
 268         }
 269
 270         return NULL;
 271 }
 272
 273 static void ct_cpu_seq_stop(struct seq_file *seq, void *v)
 274 {
 275 }
 276
 277 static int ct_cpu_seq_show(struct seq_file *seq, void *v)
 278 {
 279         unsigned int nr_conntracks = atomic_read(&nf_conntrack_count);
 280         struct ip_conntrack_stat *st = v;
 281
 282         if (v == SEQ_START_TOKEN) {
 283                 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");
 284                 return 0;
 285         }
 286
 287         seq_printf(seq, "%08x  %08x %08x %08x %08x %08x %08x %08x "
 288                         "%08x %08x %08x %08x %08x  %08x %08x %08x \n",
 289                    nr_conntracks,
 290                    st->searched,
 291                    st->found,
 292                    st->new,
 293                    st->invalid,
 294                    st->ignore,
 295                    st->delete,
 296                    st->delete_list,
 297                    st->insert,
 298                    st->insert_failed,
 299                    st->drop,
 300                    st->early_drop,
 301                    st->error,
 302
 303                    st->expect_new,
 304                    st->expect_create,
 305                    st->expect_delete
 306                 );
 307         return 0;
 308 }
 309
 310 static struct seq_operations ct_cpu_seq_ops = {
 311         .start  = ct_cpu_seq_start,
 312         .next   = ct_cpu_seq_next,
 313         .stop   = ct_cpu_seq_stop,
 314         .show   = ct_cpu_seq_show,
 315 };
 316
 317 static int ct_cpu_seq_open(struct inode *inode, struct file *file)
 318 {
 319         return seq_open(file, &ct_cpu_seq_ops);
 320 }
 321
 322 static struct file_operations ct_cpu_seq_fops = {
 323         .owner   = THIS_MODULE,
 324         .open    = ct_cpu_seq_open,
 325         .read    = seq_read,
 326         .llseek  = seq_lseek,
 327         .release = seq_release_private,
 328 };
 329 #endif /* CONFIG_PROC_FS */
 330
 331 /* Sysctl support */
 332
 333 int nf_conntrack_checksum __read_mostly = 1;
 334
 335 #ifdef CONFIG_SYSCTL
 336
 337 /* From nf_conntrack_core.c */
 338 extern int nf_conntrack_max;
 339 extern unsigned int nf_conntrack_htable_size;
 340
 341 /* From nf_conntrack_proto_tcp.c */
 342 extern unsigned int nf_ct_tcp_timeout_syn_sent;
 343 extern unsigned int nf_ct_tcp_timeout_syn_recv;
 344 extern unsigned int nf_ct_tcp_timeout_established;
 345 extern unsigned int nf_ct_tcp_timeout_fin_wait;
 346 extern unsigned int nf_ct_tcp_timeout_close_wait;
 347 extern unsigned int nf_ct_tcp_timeout_last_ack;
 348 extern unsigned int nf_ct_tcp_timeout_time_wait;
 349 extern unsigned int nf_ct_tcp_timeout_close;
 350 extern unsigned int nf_ct_tcp_timeout_max_retrans;
 351 extern int nf_ct_tcp_loose;
 352 extern int nf_ct_tcp_be_liberal;
 353 extern int nf_ct_tcp_max_retrans;
 354
 355 /* From nf_conntrack_proto_udp.c */
 356 extern unsigned int nf_ct_udp_timeout;
 357 extern unsigned int nf_ct_udp_timeout_stream;
 358
 359 /* From nf_conntrack_proto_generic.c */
 360 extern unsigned int nf_ct_generic_timeout;
 361
 362 /* Log invalid packets of a given protocol */
 363 static int log_invalid_proto_min = 0;
 364 static int log_invalid_proto_max = 255;
 365
 366 static struct ctl_table_header *nf_ct_sysctl_header;
 367
 368 static ctl_table nf_ct_sysctl_table[] = {
 369         {
 370                 .ctl_name       = NET_NF_CONNTRACK_MAX,
 371                 .procname       = "nf_conntrack_max",
 372                 .data           = &nf_conntrack_max,
 373                 .maxlen         = sizeof(int),
 374                 .mode           = 0644,
 375                 .proc_handler   = &proc_dointvec,
 376         },
 377         {
 378                 .ctl_name       = NET_NF_CONNTRACK_COUNT,
 379                 .procname       = "nf_conntrack_count",
 380                 .data           = &nf_conntrack_count,
 381                 .maxlen         = sizeof(int),
 382                 .mode           = 0444,
 383                 .proc_handler   = &proc_dointvec,
 384         },
 385         {
 386                 .ctl_name       = NET_NF_CONNTRACK_BUCKETS,
 387                 .procname       = "nf_conntrack_buckets",
 388                 .data           = &nf_conntrack_htable_size,
 389                 .maxlen         = sizeof(unsigned int),
 390                 .mode           = 0444,
 391                 .proc_handler   = &proc_dointvec,
 392         },
 393         {
 394                 .ctl_name       = NET_NF_CONNTRACK_CHECKSUM,
 395                 .procname       = "nf_conntrack_checksum",
 396                 .data           = &nf_conntrack_checksum,
 397                 .maxlen         = sizeof(unsigned int),
 398                 .mode           = 0644,
 399                 .proc_handler   = &proc_dointvec,
 400         },
 401         {
 402                 .ctl_name       = NET_NF_CONNTRACK_TCP_TIMEOUT_SYN_SENT,
 403                 .procname       = "nf_conntrack_tcp_timeout_syn_sent",
 404                 .data           = &nf_ct_tcp_timeout_syn_sent,
 405                 .maxlen         = sizeof(unsigned int),
 406                 .mode           = 0644,
 407                 .proc_handler   = &proc_dointvec_jiffies,
 408         },
 409         {
 410                 .ctl_name       = NET_NF_CONNTRACK_TCP_TIMEOUT_SYN_RECV,
 411                 .procname       = "nf_conntrack_tcp_timeout_syn_recv",
 412                 .data           = &nf_ct_tcp_timeout_syn_recv,
 413                 .maxlen         = sizeof(unsigned int),
 414                 .mode           = 0644,
 415                 .proc_handler   = &proc_dointvec_jiffies,
 416         },
 417         {
 418                 .ctl_name       = NET_NF_CONNTRACK_TCP_TIMEOUT_ESTABLISHED,
 419                 .procname       = "nf_conntrack_tcp_timeout_established",
 420                 .data           = &nf_ct_tcp_timeout_established,
 421                 .maxlen         = sizeof(unsigned int),
 422                 .mode           = 0644,
 423                 .proc_handler   = &proc_dointvec_jiffies,
 424         },
 425         {
 426                 .ctl_name       = NET_NF_CONNTRACK_TCP_TIMEOUT_FIN_WAIT,
 427                 .procname       = "nf_conntrack_tcp_timeout_fin_wait",
 428                 .data           = &nf_ct_tcp_timeout_fin_wait,
 429                 .maxlen         = sizeof(unsigned int),
 430                 .mode           = 0644,
 431                 .proc_handler   = &proc_dointvec_jiffies,
 432         },
 433         {
 434                 .ctl_name       = NET_NF_CONNTRACK_TCP_TIMEOUT_CLOSE_WAIT,
 435                 .procname       = "nf_conntrack_tcp_timeout_close_wait",
 436                 .data           = &nf_ct_tcp_timeout_close_wait,
 437                 .maxlen         = sizeof(unsigned int),
 438                 .mode           = 0644,
 439                 .proc_handler   = &proc_dointvec_jiffies,
 440         },
 441         {
 442                 .ctl_name       = NET_NF_CONNTRACK_TCP_TIMEOUT_LAST_ACK,
 443                 .procname       = "nf_conntrack_tcp_timeout_last_ack",
 444                 .data           = &nf_ct_tcp_timeout_last_ack,
 445                 .maxlen         = sizeof(unsigned int),
 446                 .mode           = 0644,
 447                 .proc_handler   = &proc_dointvec_jiffies,
 448         },
 449         {
 450                 .ctl_name       = NET_NF_CONNTRACK_TCP_TIMEOUT_TIME_WAIT,
 451                 .procname       = "nf_conntrack_tcp_timeout_time_wait",
 452                 .data           = &nf_ct_tcp_timeout_time_wait,
 453                 .maxlen         = sizeof(unsigned int),
 454                 .mode           = 0644,
 455                 .proc_handler   = &proc_dointvec_jiffies,
 456         },
 457         {
 458                 .ctl_name       = NET_NF_CONNTRACK_TCP_TIMEOUT_CLOSE,
 459                 .procname       = "nf_conntrack_tcp_timeout_close",
 460                 .data           = &nf_ct_tcp_timeout_close,
 461                 .maxlen         = sizeof(unsigned int),
 462                 .mode           = 0644,
 463                 .proc_handler   = &proc_dointvec_jiffies,
 464         },
 465         {
 466                 .ctl_name       = NET_NF_CONNTRACK_UDP_TIMEOUT,
 467                 .procname       = "nf_conntrack_udp_timeout",
 468                 .data           = &nf_ct_udp_timeout,
 469                 .maxlen         = sizeof(unsigned int),
 470                 .mode           = 0644,
 471                 .proc_handler   = &proc_dointvec_jiffies,
 472         },
 473         {
 474                 .ctl_name       = NET_NF_CONNTRACK_UDP_TIMEOUT_STREAM,
 475                 .procname       = "nf_conntrack_udp_timeout_stream",
 476                 .data           = &nf_ct_udp_timeout_stream,
 477                 .maxlen         = sizeof(unsigned int),
 478                 .mode           = 0644,
 479                 .proc_handler   = &proc_dointvec_jiffies,
 480         },
 481         {
 482                 .ctl_name       = NET_NF_CONNTRACK_GENERIC_TIMEOUT,
 483                 .procname       = "nf_conntrack_generic_timeout",
 484                 .data           = &nf_ct_generic_timeout,
 485                 .maxlen         = sizeof(unsigned int),
 486                 .mode           = 0644,
 487                 .proc_handler   = &proc_dointvec_jiffies,
 488         },
 489         {
 490                 .ctl_name       = NET_NF_CONNTRACK_LOG_INVALID,
 491                 .procname       = "nf_conntrack_log_invalid",
 492                 .data           = &nf_ct_log_invalid,
 493                 .maxlen         = sizeof(unsigned int),
 494                 .mode           = 0644,
 495                 .proc_handler   = &proc_dointvec_minmax,
 496                 .strategy       = &sysctl_intvec,
 497                 .extra1         = &log_invalid_proto_min,
 498                 .extra2         = &log_invalid_proto_max,
 499         },
 500         {
 501                 .ctl_name       = NET_NF_CONNTRACK_TCP_TIMEOUT_MAX_RETRANS,
 502                 .procname       = "nf_conntrack_tcp_timeout_max_retrans",
 503                 .data           = &nf_ct_tcp_timeout_max_retrans,
 504                 .maxlen         = sizeof(unsigned int),
 505                 .mode           = 0644,
 506                 .proc_handler   = &proc_dointvec_jiffies,
 507         },
 508         {
 509                 .ctl_name       = NET_NF_CONNTRACK_TCP_LOOSE,
 510                 .procname       = "nf_conntrack_tcp_loose",
 511                 .data           = &nf_ct_tcp_loose,
 512                 .maxlen         = sizeof(unsigned int),
 513                 .mode           = 0644,
 514                 .proc_handler   = &proc_dointvec,
 515         },
 516         {
 517                 .ctl_name       = NET_NF_CONNTRACK_TCP_BE_LIBERAL,
 518                 .procname       = "nf_conntrack_tcp_be_liberal",
 519                 .data           = &nf_ct_tcp_be_liberal,
 520                 .maxlen         = sizeof(unsigned int),
 521                 .mode           = 0644,
 522                 .proc_handler   = &proc_dointvec,
 523         },
 524         {
 525                 .ctl_name       = NET_NF_CONNTRACK_TCP_MAX_RETRANS,
 526                 .procname       = "nf_conntrack_tcp_max_retrans",
 527                 .data           = &nf_ct_tcp_max_retrans,
 528                 .maxlen         = sizeof(unsigned int),
 529                 .mode           = 0644,
 530                 .proc_handler   = &proc_dointvec,
 531         },
 532
 533         { .ctl_name = 0 }
 534 };
 535
 536 #define NET_NF_CONNTRACK_MAX 2089
 537
 538 static ctl_table nf_ct_netfilter_table[] = {
 539         {
 540                 .ctl_name       = NET_NETFILTER,
 541                 .procname       = "netfilter",
 542                 .mode           = 0555,
 543                 .child          = nf_ct_sysctl_table,
 544         },
 545         {
 546                 .ctl_name       = NET_NF_CONNTRACK_MAX,
 547                 .procname       = "nf_conntrack_max",
 548                 .data           = &nf_conntrack_max,
 549                 .maxlen         = sizeof(int),
 550                 .mode           = 0644,
 551                 .proc_handler   = &proc_dointvec,
 552         },
 553         { .ctl_name = 0 }
 554 };
 555
 556 static ctl_table nf_ct_net_table[] = {
 557         {
 558                 .ctl_name       = CTL_NET,
 559                 .procname       = "net",
 560                 .mode           = 0555,
 561                 .child          = nf_ct_netfilter_table,
 562         },
 563         { .ctl_name = 0 }
 564 };
 565 EXPORT_SYMBOL(nf_ct_log_invalid);
 566 #endif /* CONFIG_SYSCTL */
 567
 568 static int __init nf_conntrack_standalone_init(void)
 569 {
 570 #ifdef CONFIG_PROC_FS
 571         struct proc_dir_entry *proc, *proc_exp, *proc_stat;
 572 #endif
 573         int ret = 0;
 574
 575         ret = nf_conntrack_init();
 576         if (ret < 0)
 577                 return ret;
 578
 579 #ifdef CONFIG_PROC_FS
 580         proc = proc_net_fops_create("nf_conntrack", 0440, &ct_file_ops);
 581         if (!proc) goto cleanup_init;
 582
 583         proc_exp = proc_net_fops_create("nf_conntrack_expect", 0440,
 584                                         &exp_file_ops);
 585         if (!proc_exp) goto cleanup_proc;
 586
 587         proc_stat = create_proc_entry("nf_conntrack", S_IRUGO, proc_net_stat);
 588         if (!proc_stat)
 589                 goto cleanup_proc_exp;
 590
 591         proc_stat->proc_fops = &ct_cpu_seq_fops;
 592         proc_stat->owner = THIS_MODULE;
 593 #endif
 594 #ifdef CONFIG_SYSCTL
 595         nf_ct_sysctl_header = register_sysctl_table(nf_ct_net_table, 0);
 596         if (nf_ct_sysctl_header == NULL) {
 597                 printk("nf_conntrack: can't register to sysctl.\n");
 598                 ret = -ENOMEM;
 599                 goto cleanup_proc_stat;
 600         }
 601 #endif
 602         return ret;
 603
 604 #ifdef CONFIG_SYSCTL
 605  cleanup_proc_stat:
 606 #endif
 607 #ifdef CONFIG_PROC_FS
 608         remove_proc_entry("nf_conntrack", proc_net_stat);
 609  cleanup_proc_exp:
 610         proc_net_remove("nf_conntrack_expect");
 611  cleanup_proc:
 612         proc_net_remove("nf_conntrack");
 613  cleanup_init:
 614 #endif /* CNFIG_PROC_FS */
 615         nf_conntrack_cleanup();
 616         return ret;
 617 }
 618
 619 static void __exit nf_conntrack_standalone_fini(void)
 620 {
 621 #ifdef CONFIG_SYSCTL
 622         unregister_sysctl_table(nf_ct_sysctl_header);
 623 #endif
 624 #ifdef CONFIG_PROC_FS
 625         remove_proc_entry("nf_conntrack", proc_net_stat);
 626         proc_net_remove("nf_conntrack_expect");
 627         proc_net_remove("nf_conntrack");
 628 #endif /* CNFIG_PROC_FS */
 629         nf_conntrack_cleanup();
 630 }
 631
 632 module_init(nf_conntrack_standalone_init);
 633 module_exit(nf_conntrack_standalone_fini);
 634
 635 /* Some modules need us, but don't depend directly on any symbol.
 636    They should call this. */
 637 void need_conntrack(void)
 638 {
 639 }
 640
 641 #ifdef CONFIG_NF_CONNTRACK_EVENTS
 642 EXPORT_SYMBOL_GPL(nf_conntrack_chain);
 643 EXPORT_SYMBOL_GPL(nf_conntrack_expect_chain);
 644 EXPORT_SYMBOL_GPL(nf_conntrack_register_notifier);
 645 EXPORT_SYMBOL_GPL(nf_conntrack_unregister_notifier);
 646 EXPORT_SYMBOL_GPL(__nf_ct_event_cache_init);
 647 EXPORT_PER_CPU_SYMBOL_GPL(nf_conntrack_ecache);
 648 EXPORT_SYMBOL_GPL(nf_ct_deliver_cached_events);
 649 #endif
 650 EXPORT_SYMBOL(nf_ct_l3proto_try_module_get);
 651 EXPORT_SYMBOL(nf_ct_l3proto_module_put);
 652 EXPORT_SYMBOL(nf_conntrack_l3proto_register);
 653 EXPORT_SYMBOL(nf_conntrack_l3proto_unregister);
 654 EXPORT_SYMBOL(nf_conntrack_l4proto_register);
 655 EXPORT_SYMBOL(nf_conntrack_l4proto_unregister);
 656 EXPORT_SYMBOL(nf_ct_invert_tuplepr);
 657 EXPORT_SYMBOL(nf_conntrack_destroyed);
 658 EXPORT_SYMBOL(need_conntrack);
 659 EXPORT_SYMBOL(nf_conntrack_helper_register);
 660 EXPORT_SYMBOL(nf_conntrack_helper_unregister);
 661 EXPORT_SYMBOL(nf_ct_iterate_cleanup);
 662 EXPORT_SYMBOL(__nf_ct_refresh_acct);
 663 EXPORT_SYMBOL(nf_ct_protos);
 664 EXPORT_SYMBOL(__nf_ct_l4proto_find);
 665 EXPORT_SYMBOL(nf_ct_l4proto_find_get);
 666 EXPORT_SYMBOL(nf_ct_l4proto_put);
 667 EXPORT_SYMBOL(nf_ct_l3proto_find_get);
 668 EXPORT_SYMBOL(nf_ct_l3proto_put);
 669 EXPORT_SYMBOL(nf_ct_l3protos);
 670 EXPORT_SYMBOL_GPL(nf_conntrack_checksum);
 671 EXPORT_SYMBOL(nf_conntrack_expect_alloc);
 672 EXPORT_SYMBOL(nf_conntrack_expect_put);
 673 EXPORT_SYMBOL(nf_conntrack_expect_related);
 674 EXPORT_SYMBOL(nf_conntrack_unexpect_related);
 675 EXPORT_SYMBOL(nf_conntrack_tuple_taken);
 676 EXPORT_SYMBOL(nf_conntrack_htable_size);
 677 EXPORT_SYMBOL(nf_conntrack_lock);
 678 EXPORT_SYMBOL(nf_conntrack_hash);
 679 EXPORT_SYMBOL(nf_conntrack_untracked);
 680 EXPORT_SYMBOL_GPL(nf_conntrack_find_get);
 681 #ifdef CONFIG_IP_NF_NAT_NEEDED
 682 EXPORT_SYMBOL(nf_conntrack_tcp_update);
 683 #endif
 684 EXPORT_SYMBOL(__nf_conntrack_confirm);
 685 EXPORT_SYMBOL(nf_ct_get_tuple);
 686 EXPORT_SYMBOL(nf_ct_invert_tuple);
 687 EXPORT_SYMBOL(nf_conntrack_in);
 688 EXPORT_SYMBOL(__nf_conntrack_attach);
 689 EXPORT_SYMBOL(nf_conntrack_alloc);
 690 EXPORT_SYMBOL(nf_conntrack_free);
 691 EXPORT_SYMBOL(nf_conntrack_flush);
 692 EXPORT_SYMBOL(nf_ct_remove_expectations);
 693 EXPORT_SYMBOL(nf_ct_helper_find_get);
 694 EXPORT_SYMBOL(nf_ct_helper_put);
 695 EXPORT_SYMBOL(__nf_conntrack_helper_find_byname);
 696 EXPORT_SYMBOL(__nf_conntrack_find);
 697 EXPORT_SYMBOL(nf_ct_unlink_expect);
 698 EXPORT_SYMBOL(nf_conntrack_hash_insert);
 699 EXPORT_SYMBOL(__nf_conntrack_expect_find);
 700 EXPORT_SYMBOL(nf_conntrack_expect_find);
 701 EXPORT_SYMBOL(nf_conntrack_expect_list);
 702 #if defined(CONFIG_NF_CT_NETLINK) || \
 703     defined(CONFIG_NF_CT_NETLINK_MODULE)
 704 EXPORT_SYMBOL(nf_ct_port_tuple_to_nfattr);
 705 EXPORT_SYMBOL(nf_ct_port_nfattr_to_tuple);
 706 #endif