src/s_newconf.c

   1 /*
   2  * ircd-ratbox: an advanced Internet Relay Chat Daemon(ircd).
   3  * s_newconf.c - code for dealing with conf stuff
   4  *
   5  * Copyright (C) 2004 Lee Hardy <lee@leeh.co.uk>
   6  * Copyright (C) 2004-2005 ircd-ratbox development team
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions are
  10  * met:
  11  *
  12  * 1.Redistributions of source code must retain the above copyright notice,
  13  *   this list of conditions and the following disclaimer.
  14  * 2.Redistributions in binary form must reproduce the above copyright
  15  *   notice, this list of conditions and the following disclaimer in the
  16  *   documentation and/or other materials provided with the distribution.
  17  * 3.The name of the author may not be used to endorse or promote products
  18  *   derived from this software without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  21  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  22  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  23  * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
  24  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  25  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  26  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  28  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  29  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  30  * POSSIBILITY OF SUCH DAMAGE.
  31  *
  32  * $Id: s_newconf.c 3508 2007-06-04 16:04:49Z jilles $
  33  */
  34
  35 #include "stdinc.h"
  36 #include "ircd_defs.h"
  37 #include "common.h"
  38 #include "s_conf.h"
  39 #include "s_newconf.h"
  40 #include "client.h"
  41 #include "s_serv.h"
  42 #include "send.h"
  43 #include "hostmask.h"
  44 #include "newconf.h"
  45 #include "hash.h"
  46 #include "irc_dictionary.h"
  47
  48 rb_dlink_list shared_conf_list;
  49 rb_dlink_list cluster_conf_list;
  50 rb_dlink_list oper_conf_list;
  51 rb_dlink_list hubleaf_conf_list;
  52 rb_dlink_list server_conf_list;
  53 rb_dlink_list xline_conf_list;
  54 rb_dlink_list resv_conf_list;   /* nicks only! */
  55 rb_dlink_list nd_list;          /* nick delay */
  56 rb_dlink_list tgchange_list;
  57
  58 rb_patricia_tree_t *tgchange_tree;
  59
  60 static rb_bh *nd_heap = NULL;
  61
  62 static void expire_temp_rxlines(void *unused);
  63 static void expire_nd_entries(void *unused);
  64
  65 struct ev_entry *expire_nd_entries_ev = NULL;
  66 struct ev_entry *expire_temp_rxlines_ev = NULL;
  67
  68 void
  69 init_s_newconf(void)
  70 {
  71         tgchange_tree = rb_new_patricia(PATRICIA_BITS);
  72         nd_heap = rb_bh_create(sizeof(struct nd_entry), ND_HEAP_SIZE, "nd_heap");
  73         expire_nd_entries_ev = rb_event_addish("expire_nd_entries", expire_nd_entries, NULL, 30);
  74         expire_temp_rxlines_ev = rb_event_addish("expire_temp_rxlines", expire_temp_rxlines, NULL, 60);
  75 }
  76
  77 void
  78 clear_s_newconf(void)
  79 {
  80         struct server_conf *server_p;
  81         rb_dlink_node *ptr;
  82         rb_dlink_node *next_ptr;
  83
  84         RB_DLINK_FOREACH_SAFE(ptr, next_ptr, shared_conf_list.head)
  85         {
  86                 /* ptr here is ptr->data->node */
  87                 rb_dlinkDelete(ptr, &shared_conf_list);
  88                 free_remote_conf(ptr->data);
  89         }
  90
  91         RB_DLINK_FOREACH_SAFE(ptr, next_ptr, cluster_conf_list.head)
  92         {
  93                 rb_dlinkDelete(ptr, &cluster_conf_list);
  94                 free_remote_conf(ptr->data);
  95         }
  96
  97         RB_DLINK_FOREACH_SAFE(ptr, next_ptr, hubleaf_conf_list.head)
  98         {
  99                 rb_dlinkDelete(ptr, &hubleaf_conf_list);
 100                 free_remote_conf(ptr->data);
 101         }
 102
 103         RB_DLINK_FOREACH_SAFE(ptr, next_ptr, oper_conf_list.head)
 104         {
 105                 free_oper_conf(ptr->data);
 106                 rb_dlinkDestroy(ptr, &oper_conf_list);
 107         }
 108
 109         RB_DLINK_FOREACH_SAFE(ptr, next_ptr, server_conf_list.head)
 110         {
 111                 server_p = ptr->data;
 112
 113                 if(!server_p->servers)
 114                 {
 115                         rb_dlinkDelete(ptr, &server_conf_list);
 116                         free_server_conf(ptr->data);
 117                 }
 118                 else
 119                         server_p->flags |= SERVER_ILLEGAL;
 120         }
 121 }
 122
 123 void
 124 clear_s_newconf_bans(void)
 125 {
 126         struct ConfItem *aconf;
 127         rb_dlink_node *ptr, *next_ptr;
 128
 129         RB_DLINK_FOREACH_SAFE(ptr, next_ptr, xline_conf_list.head)
 130         {
 131                 aconf = ptr->data;
 132
 133                 if(aconf->hold)
 134                         continue;
 135
 136                 free_conf(aconf);
 137                 rb_dlinkDestroy(ptr, &xline_conf_list);
 138         }
 139
 140         RB_DLINK_FOREACH_SAFE(ptr, next_ptr, resv_conf_list.head)
 141         {
 142                 aconf = ptr->data;
 143
 144                 /* temporary resv */
 145                 if(aconf->hold)
 146                         continue;
 147
 148                 free_conf(aconf);
 149                 rb_dlinkDestroy(ptr, &resv_conf_list);
 150         }
 151
 152         clear_resv_hash();
 153 }
 154
 155 struct remote_conf *
 156 make_remote_conf(void)
 157 {
 158         struct remote_conf *remote_p = rb_malloc(sizeof(struct remote_conf));
 159         return remote_p;
 160 }
 161
 162 void
 163 free_remote_conf(struct remote_conf *remote_p)
 164 {
 165         s_assert(remote_p != NULL);
 166         if(remote_p == NULL)
 167                 return;
 168
 169         rb_free(remote_p->username);
 170         rb_free(remote_p->host);
 171         rb_free(remote_p->server);
 172         rb_free(remote_p);
 173 }
 174
 175 int
 176 find_shared_conf(const char *username, const char *host,
 177                 const char *server, int flags)
 178 {
 179         struct remote_conf *shared_p;
 180         rb_dlink_node *ptr;
 181
 182         RB_DLINK_FOREACH(ptr, shared_conf_list.head)
 183         {
 184                 shared_p = ptr->data;
 185
 186                 if(match(shared_p->username, username) &&
 187                    match(shared_p->host, host) &&
 188                    match(shared_p->server, server))
 189                 {
 190                         if(shared_p->flags & flags)
 191                                 return YES;
 192                         else
 193                                 return NO;
 194                 }
 195         }
 196
 197         return NO;
 198 }
 199
 200 void
 201 propagate_generic(struct Client *source_p, const char *command,
 202                 const char *target, int cap, const char *format, ...)
 203 {
 204         char buffer[BUFSIZE];
 205         va_list args;
 206
 207         va_start(args, format);
 208         rb_vsnprintf(buffer, sizeof(buffer), format, args);
 209         va_end(args);
 210
 211         sendto_match_servs(source_p, target, cap, NOCAPS,
 212                         "%s %s %s",
 213                         command, target, buffer);
 214         sendto_match_servs(source_p, target, CAP_ENCAP, cap,
 215                         "ENCAP %s %s %s",
 216                         target, command, buffer);
 217 }
 218
 219 void
 220 cluster_generic(struct Client *source_p, const char *command,
 221                 int cltype, int cap, const char *format, ...)
 222 {
 223         char buffer[BUFSIZE];
 224         struct remote_conf *shared_p;
 225         va_list args;
 226         rb_dlink_node *ptr;
 227
 228         va_start(args, format);
 229         rb_vsnprintf(buffer, sizeof(buffer), format, args);
 230         va_end(args);
 231
 232         RB_DLINK_FOREACH(ptr, cluster_conf_list.head)
 233         {
 234                 shared_p = ptr->data;
 235
 236                 if(!(shared_p->flags & cltype))
 237                         continue;
 238
 239                 sendto_match_servs(source_p, shared_p->server, cap, NOCAPS,
 240                                 "%s %s %s",
 241                                 command, shared_p->server, buffer);
 242                 sendto_match_servs(source_p, shared_p->server, CAP_ENCAP, cap,
 243                                 "ENCAP %s %s %s",
 244                                 shared_p->server, command, buffer);
 245         }
 246 }
 247
 248 struct oper_conf *
 249 make_oper_conf(void)
 250 {
 251         struct oper_conf *oper_p = rb_malloc(sizeof(struct oper_conf));
 252         return oper_p;
 253 }
 254
 255 void
 256 free_oper_conf(struct oper_conf *oper_p)
 257 {
 258         s_assert(oper_p != NULL);
 259         if(oper_p == NULL)
 260                 return;
 261
 262         rb_free(oper_p->username);
 263         rb_free(oper_p->host);
 264         rb_free(oper_p->name);
 265
 266         if(oper_p->passwd)
 267         {
 268                 memset(oper_p->passwd, 0, strlen(oper_p->passwd));
 269                 rb_free(oper_p->passwd);
 270         }
 271
 272 #ifdef HAVE_LIBCRYPTO
 273         rb_free(oper_p->rsa_pubkey_file);
 274
 275         if(oper_p->rsa_pubkey)
 276                 RSA_free(oper_p->rsa_pubkey);
 277 #endif
 278
 279         rb_free(oper_p);
 280 }
 281
 282 struct oper_conf *
 283 find_oper_conf(const char *username, const char *host, const char *locip, const char *name)
 284 {
 285         struct oper_conf *oper_p;
 286         struct rb_sockaddr_storage ip, cip;
 287         char addr[HOSTLEN+1];
 288         int bits, cbits;
 289         rb_dlink_node *ptr;
 290
 291         parse_netmask(locip, (struct sockaddr *)&cip, &cbits);
 292
 293         RB_DLINK_FOREACH(ptr, oper_conf_list.head)
 294         {
 295                 oper_p = ptr->data;
 296
 297                 /* name/username doesnt match.. */
 298                 if(irccmp(oper_p->name, name) || !match(oper_p->username, username))
 299                         continue;
 300
 301                 rb_strlcpy(addr, oper_p->host, sizeof(addr));
 302
 303                 if(parse_netmask(addr, (struct sockaddr *)&ip, &bits) != HM_HOST)
 304                 {
 305                         if(ip.ss_family == cip.ss_family &&
 306                            comp_with_mask_sock((struct sockaddr *)&ip, (struct sockaddr *)&cip, bits))
 307                                 return oper_p;
 308                 }
 309
 310                 /* we have to compare against the host as well, because its
 311                  * valid to set a spoof to an IP, which if we only compare
 312                  * in ip form to sockhost will not necessarily match --anfl
 313                  */
 314                 if(match(oper_p->host, host))
 315                         return oper_p;
 316         }
 317
 318         return NULL;
 319 }
 320
 321 struct server_conf *
 322 make_server_conf(void)
 323 {
 324         struct server_conf *server_p = rb_malloc(sizeof(struct server_conf));
 325         server_p->aftype = AF_INET;
 326         return server_p;
 327 }
 328
 329 void
 330 free_server_conf(struct server_conf *server_p)
 331 {
 332         s_assert(server_p != NULL);
 333         if(server_p == NULL)
 334                 return;
 335
 336         if(!EmptyString(server_p->passwd))
 337         {
 338                 memset(server_p->passwd, 0, strlen(server_p->passwd));
 339                 rb_free(server_p->passwd);
 340         }
 341
 342         if(!EmptyString(server_p->spasswd))
 343         {
 344                 memset(server_p->spasswd, 0, strlen(server_p->spasswd));
 345                 rb_free(server_p->spasswd);
 346         }
 347
 348         rb_free(server_p->name);
 349         rb_free(server_p->host);
 350         rb_free(server_p->class_name);
 351         rb_free(server_p);
 352 }
 353
 354 void
 355 add_server_conf(struct server_conf *server_p)
 356 {
 357         if(EmptyString(server_p->class_name))
 358         {
 359                 server_p->class_name = rb_strdup("default");
 360                 server_p->class = default_class;
 361                 return;
 362         }
 363
 364         server_p->class = find_class(server_p->class_name);
 365
 366         if(server_p->class == default_class)
 367         {
 368                 conf_report_error("Warning connect::class invalid for %s",
 369                                 server_p->name);
 370
 371                 rb_free(server_p->class_name);
 372                 server_p->class_name = rb_strdup("default");
 373         }
 374
 375         if(strchr(server_p->host, '*') || strchr(server_p->host, '?'))
 376                 return;
 377 }
 378
 379 struct server_conf *
 380 find_server_conf(const char *name)
 381 {
 382         struct server_conf *server_p;
 383         rb_dlink_node *ptr;
 384
 385         RB_DLINK_FOREACH(ptr, server_conf_list.head)
 386         {
 387                 server_p = ptr->data;
 388
 389                 if(ServerConfIllegal(server_p))
 390                         continue;
 391
 392                 if(match(name, server_p->name))
 393                         return server_p;
 394         }
 395
 396         return NULL;
 397 }
 398
 399 void
 400 attach_server_conf(struct Client *client_p, struct server_conf *server_p)
 401 {
 402         /* already have an attached conf */
 403         if(client_p->localClient->att_sconf)
 404         {
 405                 /* short circuit this special case :) */
 406                 if(client_p->localClient->att_sconf == server_p)
 407                         return;
 408
 409                 detach_server_conf(client_p);
 410         }
 411
 412         CurrUsers(server_p->class)++;
 413
 414         client_p->localClient->att_sconf = server_p;
 415         server_p->servers++;
 416 }
 417
 418 void
 419 detach_server_conf(struct Client *client_p)
 420 {
 421         struct server_conf *server_p = client_p->localClient->att_sconf;
 422
 423         if(server_p == NULL)
 424                 return;
 425
 426         client_p->localClient->att_sconf = NULL;
 427         server_p->servers--;
 428         CurrUsers(server_p->class)--;
 429
 430         if(ServerConfIllegal(server_p) && !server_p->servers)
 431         {
 432                 /* the class this one is using may need destroying too */
 433                 if(MaxUsers(server_p->class) < 0 && CurrUsers(server_p->class) <= 0)
 434                         free_class(server_p->class);
 435
 436                 rb_dlinkDelete(&server_p->node, &server_conf_list);
 437                 free_server_conf(server_p);
 438         }
 439 }
 440
 441 void
 442 set_server_conf_autoconn(struct Client *source_p, const char *name, int newval)
 443 {
 444         struct server_conf *server_p;
 445
 446         if((server_p = find_server_conf(name)) != NULL)
 447         {
 448                 if(newval)
 449                         server_p->flags |= SERVER_AUTOCONN;
 450                 else
 451                         server_p->flags &= ~SERVER_AUTOCONN;
 452
 453                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 454                                 "%s has changed AUTOCONN for %s to %i",
 455                                 get_oper_name(source_p), name, newval);
 456         }
 457         else
 458                 sendto_one_notice(source_p, ":Can't find %s", name);
 459 }
 460
 461 struct ConfItem *
 462 find_xline(const char *gecos, int counter)
 463 {
 464         struct ConfItem *aconf;
 465         rb_dlink_node *ptr;
 466
 467         RB_DLINK_FOREACH(ptr, xline_conf_list.head)
 468         {
 469                 aconf = ptr->data;
 470
 471                 if(match_esc(aconf->name, gecos))
 472                 {
 473                         if(counter)
 474                                 aconf->port++;
 475                         return aconf;
 476                 }
 477         }
 478
 479         return NULL;
 480 }
 481
 482 struct ConfItem *
 483 find_xline_mask(const char *gecos)
 484 {
 485         struct ConfItem *aconf;
 486         rb_dlink_node *ptr;
 487
 488         RB_DLINK_FOREACH(ptr, xline_conf_list.head)
 489         {
 490                 aconf = ptr->data;
 491
 492                 if(!irccmp(aconf->name, gecos))
 493                         return aconf;
 494         }
 495
 496         return NULL;
 497 }
 498
 499 struct ConfItem *
 500 find_nick_resv(const char *name)
 501 {
 502         struct ConfItem *aconf;
 503         rb_dlink_node *ptr;
 504
 505         RB_DLINK_FOREACH(ptr, resv_conf_list.head)
 506         {
 507                 aconf = ptr->data;
 508
 509                 if(match_esc(aconf->name, name))
 510                 {
 511                         aconf->port++;
 512                         return aconf;
 513                 }
 514         }
 515
 516         return NULL;
 517 }
 518
 519 struct ConfItem *
 520 find_nick_resv_mask(const char *name)
 521 {
 522         struct ConfItem *aconf;
 523         rb_dlink_node *ptr;
 524
 525         RB_DLINK_FOREACH(ptr, resv_conf_list.head)
 526         {
 527                 aconf = ptr->data;
 528
 529                 if(!irccmp(aconf->name, name))
 530                         return aconf;
 531         }
 532
 533         return NULL;
 534 }
 535
 536 /* clean_resv_nick()
 537  *
 538  * inputs       - nick
 539  * outputs      - 1 if nick is vaild resv, 0 otherwise
 540  * side effects -
 541  */
 542 int
 543 clean_resv_nick(const char *nick)
 544 {
 545         char tmpch;
 546         int as = 0;
 547         int q = 0;
 548         int ch = 0;
 549
 550         if(*nick == '-' || IsDigit(*nick))
 551                 return 0;
 552
 553         while ((tmpch = *nick++))
 554         {
 555                 if(tmpch == '?' || tmpch == '@' || tmpch == '#')
 556                         q++;
 557                 else if(tmpch == '*')
 558                         as++;
 559                 else if(IsNickChar(tmpch))
 560                         ch++;
 561                 else
 562                         return 0;
 563         }
 564
 565         if(!ch && as)
 566                 return 0;
 567
 568         return 1;
 569 }
 570
 571 /* valid_wild_card_simple()
 572  *
 573  * inputs       - "thing" to test
 574  * outputs      - 1 if enough wildcards, else 0
 575  * side effects -
 576  */
 577 int
 578 valid_wild_card_simple(const char *data)
 579 {
 580         const char *p;
 581         char tmpch;
 582         int nonwild = 0;
 583         int wild = 0;
 584
 585         /* check the string for minimum number of nonwildcard chars */
 586         p = data;
 587
 588         while((tmpch = *p++))
 589         {
 590                 /* found an escape, p points to the char after it, so skip
 591                  * that and move on.
 592                  */
 593                 if(tmpch == '\\' && *p)
 594                 {
 595                         p++;
 596                         if(++nonwild >= ConfigFileEntry.min_nonwildcard_simple)
 597                                 return 1;
 598                 }
 599                 else if(!IsMWildChar(tmpch))
 600                 {
 601                         /* if we have enough nonwildchars, return */
 602                         if(++nonwild >= ConfigFileEntry.min_nonwildcard_simple)
 603                                 return 1;
 604                 }
 605                 else
 606                         wild++;
 607         }
 608
 609         /* strings without wilds are also ok */
 610         return wild == 0;
 611 }
 612
 613 time_t
 614 valid_temp_time(const char *p)
 615 {
 616         time_t result = 0;
 617
 618         while(*p)
 619         {
 620                 if(IsDigit(*p))
 621                 {
 622                         result *= 10;
 623                         result += ((*p) & 0xF);
 624                         p++;
 625                 }
 626                 else
 627                         return -1;
 628         }
 629
 630         if(result > (60 * 24 * 7 * 52))
 631                 result = (60 * 24 * 7 * 52);
 632
 633         return(result * 60);
 634 }
 635
 636 static void
 637 expire_temp_rxlines(void *unused)
 638 {
 639         struct ConfItem *aconf;
 640         rb_dlink_node *ptr;
 641         rb_dlink_node *next_ptr;
 642         int i;
 643
 644         HASH_WALK_SAFE(i, R_MAX, ptr, next_ptr, resvTable)
 645         {
 646                 aconf = ptr->data;
 647
 648                 if(aconf->hold && aconf->hold <= rb_current_time())
 649                 {
 650                         if(ConfigFileEntry.tkline_expire_notices)
 651                                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 652                                                 "Temporary RESV for [%s] expired",
 653                                                 aconf->name);
 654
 655                         free_conf(aconf);
 656                         rb_dlinkDestroy(ptr, &resvTable[i]);
 657                 }
 658         }
 659         HASH_WALK_END
 660
 661         RB_DLINK_FOREACH_SAFE(ptr, next_ptr, resv_conf_list.head)
 662         {
 663                 aconf = ptr->data;
 664
 665                 if(aconf->hold && aconf->hold <= rb_current_time())
 666                 {
 667                         if(ConfigFileEntry.tkline_expire_notices)
 668                                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 669                                                 "Temporary RESV for [%s] expired",
 670                                                 aconf->name);
 671                         free_conf(aconf);
 672                         rb_dlinkDestroy(ptr, &resv_conf_list);
 673                 }
 674         }
 675
 676         RB_DLINK_FOREACH_SAFE(ptr, next_ptr, xline_conf_list.head)
 677         {
 678                 aconf = ptr->data;
 679
 680                 if(aconf->hold && aconf->hold <= rb_current_time())
 681                 {
 682                         if(ConfigFileEntry.tkline_expire_notices)
 683                                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 684                                                 "Temporary X-line for [%s] expired",
 685                                                 aconf->name);
 686                         free_conf(aconf);
 687                         rb_dlinkDestroy(ptr, &xline_conf_list);
 688                 }
 689         }
 690 }
 691
 692 unsigned long
 693 get_nd_count(void)
 694 {
 695         return(rb_dlink_list_length(&nd_list));
 696 }
 697
 698 void
 699 add_nd_entry(const char *name)
 700 {
 701         struct nd_entry *nd;
 702
 703         if(irc_dictionary_find(nd_dict, name) != NULL)
 704                 return;
 705
 706         nd = rb_bh_alloc(nd_heap);
 707
 708         rb_strlcpy(nd->name, name, sizeof(nd->name));
 709         nd->expire = rb_current_time() + ConfigFileEntry.nick_delay;
 710
 711         /* this list is ordered */
 712         rb_dlinkAddTail(nd, &nd->lnode, &nd_list);
 713
 714         irc_dictionary_add(nd_dict, nd->name, nd);
 715 }
 716
 717 void
 718 free_nd_entry(struct nd_entry *nd)
 719 {
 720         irc_dictionary_delete(nd_dict, nd->name);
 721
 722         rb_dlinkDelete(&nd->lnode, &nd_list);
 723         rb_bh_free(nd_heap, nd);
 724 }
 725
 726 void
 727 expire_nd_entries(void *unused)
 728 {
 729         struct nd_entry *nd;
 730         rb_dlink_node *ptr;
 731         rb_dlink_node *next_ptr;
 732
 733         RB_DLINK_FOREACH_SAFE(ptr, next_ptr, nd_list.head)
 734         {
 735                 nd = ptr->data;
 736
 737                 /* this list is ordered - we can stop when we hit the first
 738                  * entry that doesnt expire..
 739                  */
 740                 if(nd->expire > rb_current_time())
 741                         return;
 742
 743                 free_nd_entry(nd);
 744         }
 745 }
 746
 747 void
 748 add_tgchange(const char *host)
 749 {
 750         tgchange *target;
 751         rb_patricia_node_t *pnode;
 752
 753         if(find_tgchange(host))
 754                 return;
 755
 756         target = rb_malloc(sizeof(tgchange));
 757         pnode = make_and_lookup(tgchange_tree, host);
 758
 759         pnode->data = target;
 760         target->pnode = pnode;
 761
 762         target->ip = rb_strdup(host);
 763         target->expiry = rb_current_time() + (60*60*12);
 764
 765         rb_dlinkAdd(target, &target->node, &tgchange_list);
 766 }
 767
 768 tgchange *
 769 find_tgchange(const char *host)
 770 {
 771         rb_patricia_node_t *pnode;
 772
 773         if((pnode = rb_match_exact_string(tgchange_tree, host)))
 774                 return pnode->data;
 775
 776         return NULL;
 777 }
 778