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 147 2006-11-13 12:35:45Z spb $
  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 "tools.h"
  41 #include "client.h"
  42 #include "memory.h"
  43 #include "s_serv.h"
  44 #include "send.h"
  45 #include "hostmask.h"
  46 #include "newconf.h"
  47 #include "hash.h"
  48 #include "balloc.h"
  49 #include "event.h"
  50 #include "sprintf_irc.h"
  51
  52 dlink_list shared_conf_list;
  53 dlink_list cluster_conf_list;
  54 dlink_list oper_conf_list;
  55 dlink_list hubleaf_conf_list;
  56 dlink_list server_conf_list;
  57 dlink_list xline_conf_list;
  58 dlink_list resv_conf_list;      /* nicks only! */
  59 dlink_list nd_list;             /* nick delay */
  60 dlink_list tgchange_list;
  61
  62 patricia_tree_t *tgchange_tree;
  63
  64 static BlockHeap *nd_heap = NULL;
  65
  66 static void expire_temp_rxlines(void *unused);
  67 static void expire_nd_entries(void *unused);
  68
  69 void
  70 init_s_newconf(void)
  71 {
  72         tgchange_tree = New_Patricia(PATRICIA_BITS);
  73         nd_heap = BlockHeapCreate(sizeof(struct nd_entry), ND_HEAP_SIZE);
  74         eventAddIsh("expire_nd_entries", expire_nd_entries, NULL, 30);
  75         eventAddIsh("expire_temp_rxlines", expire_temp_rxlines, NULL, 60);
  76 }
  77
  78 void
  79 clear_s_newconf(void)
  80 {
  81         struct server_conf *server_p;
  82         dlink_node *ptr;
  83         dlink_node *next_ptr;
  84
  85         DLINK_FOREACH_SAFE(ptr, next_ptr, shared_conf_list.head)
  86         {
  87                 /* ptr here is ptr->data->node */
  88                 dlinkDelete(ptr, &shared_conf_list);
  89                 free_remote_conf(ptr->data);
  90         }
  91
  92         DLINK_FOREACH_SAFE(ptr, next_ptr, cluster_conf_list.head)
  93         {
  94                 dlinkDelete(ptr, &cluster_conf_list);
  95                 free_remote_conf(ptr->data);
  96         }
  97
  98         DLINK_FOREACH_SAFE(ptr, next_ptr, hubleaf_conf_list.head)
  99         {
 100                 dlinkDelete(ptr, &hubleaf_conf_list);
 101                 free_remote_conf(ptr->data);
 102         }
 103
 104         DLINK_FOREACH_SAFE(ptr, next_ptr, oper_conf_list.head)
 105         {
 106                 free_oper_conf(ptr->data);
 107                 dlinkDestroy(ptr, &oper_conf_list);
 108         }
 109
 110         DLINK_FOREACH_SAFE(ptr, next_ptr, server_conf_list.head)
 111         {
 112                 server_p = ptr->data;
 113
 114                 if(!server_p->servers)
 115                 {
 116                         dlinkDelete(ptr, &server_conf_list);
 117                         free_server_conf(ptr->data);
 118                 }
 119                 else
 120                         server_p->flags |= SERVER_ILLEGAL;
 121         }
 122 }
 123
 124 void
 125 clear_s_newconf_bans(void)
 126 {
 127         struct ConfItem *aconf;
 128         dlink_node *ptr, *next_ptr;
 129
 130         DLINK_FOREACH_SAFE(ptr, next_ptr, xline_conf_list.head)
 131         {
 132                 aconf = ptr->data;
 133
 134                 if(aconf->hold)
 135                         continue;
 136
 137                 free_conf(aconf);
 138                 dlinkDestroy(ptr, &xline_conf_list);
 139         }
 140
 141         DLINK_FOREACH_SAFE(ptr, next_ptr, resv_conf_list.head)
 142         {
 143                 aconf = ptr->data;
 144
 145                 /* temporary resv */
 146                 if(aconf->hold)
 147                         continue;
 148
 149                 free_conf(aconf);
 150                 dlinkDestroy(ptr, &resv_conf_list);
 151         }
 152
 153         clear_resv_hash();
 154 }
 155
 156 struct remote_conf *
 157 make_remote_conf(void)
 158 {
 159         struct remote_conf *remote_p = MyMalloc(sizeof(struct remote_conf));
 160         return remote_p;
 161 }
 162
 163 void
 164 free_remote_conf(struct remote_conf *remote_p)
 165 {
 166         s_assert(remote_p != NULL);
 167         if(remote_p == NULL)
 168                 return;
 169
 170         MyFree(remote_p->username);
 171         MyFree(remote_p->host);
 172         MyFree(remote_p->server);
 173         MyFree(remote_p);
 174 }
 175
 176 int
 177 find_shared_conf(const char *username, const char *host,
 178                 const char *server, int flags)
 179 {
 180         struct remote_conf *shared_p;
 181         dlink_node *ptr;
 182
 183         DLINK_FOREACH(ptr, shared_conf_list.head)
 184         {
 185                 shared_p = ptr->data;
 186
 187                 if(match(shared_p->username, username) &&
 188                    match(shared_p->host, host) &&
 189                    match(shared_p->server, server))
 190                 {
 191                         if(shared_p->flags & flags)
 192                                 return YES;
 193                         else
 194                                 return NO;
 195                 }
 196         }
 197
 198         return NO;
 199 }
 200
 201 void
 202 propagate_generic(struct Client *source_p, const char *command,
 203                 const char *target, int cap, const char *format, ...)
 204 {
 205         char buffer[BUFSIZE];
 206         va_list args;
 207
 208         va_start(args, format);
 209         ircvsnprintf(buffer, sizeof(buffer), format, args);
 210         va_end(args);
 211
 212         sendto_match_servs(source_p, target, cap, NOCAPS,
 213                         "%s %s %s",
 214                         command, target, buffer);
 215         sendto_match_servs(source_p, target, CAP_ENCAP, cap,
 216                         "ENCAP %s %s %s",
 217                         target, command, buffer);
 218 }
 219
 220 void
 221 cluster_generic(struct Client *source_p, const char *command,
 222                 int cltype, int cap, const char *format, ...)
 223 {
 224         char buffer[BUFSIZE];
 225         struct remote_conf *shared_p;
 226         va_list args;
 227         dlink_node *ptr;
 228
 229         va_start(args, format);
 230         ircvsnprintf(buffer, sizeof(buffer), format, args);
 231         va_end(args);
 232
 233         DLINK_FOREACH(ptr, cluster_conf_list.head)
 234         {
 235                 shared_p = ptr->data;
 236
 237                 if(!(shared_p->flags & cltype))
 238                         continue;
 239
 240                 sendto_match_servs(source_p, shared_p->server, cap, NOCAPS,
 241                                 "%s %s %s",
 242                                 command, shared_p->server, buffer);
 243                 sendto_match_servs(source_p, shared_p->server, CAP_ENCAP, cap,
 244                                 "ENCAP %s %s %s",
 245                                 shared_p->server, command, buffer);
 246         }
 247 }
 248
 249 struct oper_conf *
 250 make_oper_conf(void)
 251 {
 252         struct oper_conf *oper_p = MyMalloc(sizeof(struct oper_conf));
 253         return oper_p;
 254 }
 255
 256 void
 257 free_oper_conf(struct oper_conf *oper_p)
 258 {
 259         s_assert(oper_p != NULL);
 260         if(oper_p == NULL)
 261                 return;
 262
 263         MyFree(oper_p->username);
 264         MyFree(oper_p->host);
 265         MyFree(oper_p->name);
 266
 267         if(oper_p->passwd)
 268         {
 269                 memset(oper_p->passwd, 0, strlen(oper_p->passwd));
 270                 MyFree(oper_p->passwd);
 271         }
 272
 273 #ifdef HAVE_LIBCRYPTO
 274         MyFree(oper_p->rsa_pubkey_file);
 275
 276         if(oper_p->rsa_pubkey)
 277                 RSA_free(oper_p->rsa_pubkey);
 278 #endif
 279
 280         MyFree(oper_p);
 281 }
 282
 283 struct oper_conf *
 284 find_oper_conf(const char *username, const char *host, const char *locip, const char *name)
 285 {
 286         struct oper_conf *oper_p;
 287         struct irc_sockaddr_storage ip, cip;
 288         char addr[HOSTLEN+1];
 289         int bits, cbits;
 290         dlink_node *ptr;
 291
 292         parse_netmask(locip, (struct sockaddr *)&cip, &cbits);
 293
 294         DLINK_FOREACH(ptr, oper_conf_list.head)
 295         {
 296                 oper_p = ptr->data;
 297
 298                 /* name/username doesnt match.. */
 299                 if(irccmp(oper_p->name, name) || !match(oper_p->username, username))
 300                         continue;
 301
 302                 strlcpy(addr, oper_p->host, sizeof(addr));
 303
 304                 if(parse_netmask(addr, (struct sockaddr *)&ip, &bits) != HM_HOST)
 305                 {
 306                         if(ip.ss_family == cip.ss_family &&
 307                            comp_with_mask_sock((struct sockaddr *)&ip, (struct sockaddr *)&cip, bits))
 308                                 return oper_p;
 309                 }
 310
 311                 /* we have to compare against the host as well, because its
 312                  * valid to set a spoof to an IP, which if we only compare
 313                  * in ip form to sockhost will not necessarily match --anfl
 314                  */
 315                 if(match(oper_p->host, host))
 316                         return oper_p;
 317         }
 318
 319         return NULL;
 320 }
 321
 322 struct oper_flags oper_flagtable[] =
 323 {
 324         { OPER_ADMIN,           'A', 'a' },
 325         { OPER_REMOTEBAN,       'B', 'b' },
 326         { OPER_KILL,            'C', 'c' },
 327         { OPER_DIE,             'D', 'd' },
 328         { OPER_EXPERIMENTAL,    'E', 'e' },
 329         { OPER_STAFFER,         'F', 'f' },
 330         { OPER_GRANT,           'G', 'g' },
 331         { OPER_REHASH,          'H', 'h' },
 332         { OPER_KLINE,           'K', 'k' },
 333         { OPER_OPERWALL,        'L', 'l' },
 334         { OPER_CMODES,          'M', 'm' },
 335         { OPER_MASSNOTICE,      'N', 'n' },
 336         { OPER_OVERRIDE,        'O', 'o' },
 337         { OPER_RESV,            'Q', 'q' },
 338         { OPER_ROUTING,         'R', 'r' },
 339         { OPER_AUSPEX,          'S', 's' },
 340         { OPER_HELPER,          'T', 't' },
 341         { OPER_UNKLINE,         'U', 'u' },
 342         { OPER_WALLOPS,         'W', 'w' },
 343         { OPER_XLINE,           'X', 'x' },
 344         { 0,                    '\0', '\0' }
 345 };
 346
 347 const char *
 348 get_oper_privs(int flags)
 349 {
 350         static char buf[20];
 351         char *p;
 352         int i;
 353
 354         p = buf;
 355
 356         for(i = 0; oper_flagtable[i].flag; i++)
 357         {
 358                 if(flags & oper_flagtable[i].flag)
 359                         *p++ = oper_flagtable[i].has;
 360                 else
 361                         *p++ = oper_flagtable[i].hasnt;
 362         }
 363
 364         *p = '\0';
 365
 366         return buf;
 367 }
 368
 369 struct server_conf *
 370 make_server_conf(void)
 371 {
 372         struct server_conf *server_p = MyMalloc(sizeof(struct server_conf));
 373         server_p->aftype = AF_INET;
 374         return server_p;
 375 }
 376
 377 void
 378 free_server_conf(struct server_conf *server_p)
 379 {
 380         s_assert(server_p != NULL);
 381         if(server_p == NULL)
 382                 return;
 383
 384         if(!EmptyString(server_p->passwd))
 385         {
 386                 memset(server_p->passwd, 0, strlen(server_p->passwd));
 387                 MyFree(server_p->passwd);
 388         }
 389
 390         if(!EmptyString(server_p->spasswd))
 391         {
 392                 memset(server_p->spasswd, 0, strlen(server_p->spasswd));
 393                 MyFree(server_p->spasswd);
 394         }
 395
 396         MyFree(server_p->name);
 397         MyFree(server_p->host);
 398         MyFree(server_p->class_name);
 399         MyFree(server_p);
 400 }
 401
 402 void
 403 add_server_conf(struct server_conf *server_p)
 404 {
 405         if(EmptyString(server_p->class_name))
 406         {
 407                 DupString(server_p->class_name, "default");
 408                 server_p->class = default_class;
 409                 return;
 410         }
 411
 412         server_p->class = find_class(server_p->class_name);
 413
 414         if(server_p->class == default_class)
 415         {
 416                 conf_report_error("Warning connect::class invalid for %s",
 417                                 server_p->name);
 418
 419                 MyFree(server_p->class_name);
 420                 DupString(server_p->class_name, "default");
 421         }
 422
 423         if(strchr(server_p->host, '*') || strchr(server_p->host, '?'))
 424                 return;
 425 }
 426
 427 struct server_conf *
 428 find_server_conf(const char *name)
 429 {
 430         struct server_conf *server_p;
 431         dlink_node *ptr;
 432
 433         DLINK_FOREACH(ptr, server_conf_list.head)
 434         {
 435                 server_p = ptr->data;
 436
 437                 if(ServerConfIllegal(server_p))
 438                         continue;
 439
 440                 if(match(name, server_p->name))
 441                         return server_p;
 442         }
 443
 444         return NULL;
 445 }
 446
 447 void
 448 attach_server_conf(struct Client *client_p, struct server_conf *server_p)
 449 {
 450         /* already have an attached conf */
 451         if(client_p->localClient->att_sconf)
 452         {
 453                 /* short circuit this special case :) */
 454                 if(client_p->localClient->att_sconf == server_p)
 455                         return;
 456
 457                 detach_server_conf(client_p);
 458         }
 459
 460         CurrUsers(server_p->class)++;
 461
 462         client_p->localClient->att_sconf = server_p;
 463         server_p->servers++;
 464 }
 465
 466 void
 467 detach_server_conf(struct Client *client_p)
 468 {
 469         struct server_conf *server_p = client_p->localClient->att_sconf;
 470
 471         if(server_p == NULL)
 472                 return;
 473
 474         client_p->localClient->att_sconf = NULL;
 475         server_p->servers--;
 476         CurrUsers(server_p->class)--;
 477
 478         if(ServerConfIllegal(server_p) && !server_p->servers)
 479         {
 480                 /* the class this one is using may need destroying too */
 481                 if(MaxUsers(server_p->class) < 0 && CurrUsers(server_p->class) <= 0)
 482                         free_class(server_p->class);
 483
 484                 dlinkDelete(&server_p->node, &server_conf_list);
 485                 free_server_conf(server_p);
 486         }
 487 }
 488
 489 void
 490 set_server_conf_autoconn(struct Client *source_p, char *name, int newval)
 491 {
 492         struct server_conf *server_p;
 493
 494         if((server_p = find_server_conf(name)) != NULL)
 495         {
 496                 if(newval)
 497                         server_p->flags |= SERVER_AUTOCONN;
 498                 else
 499                         server_p->flags &= ~SERVER_AUTOCONN;
 500
 501                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 502                                 "%s has changed AUTOCONN for %s to %i",
 503                                 get_oper_name(source_p), name, newval);
 504         }
 505         else
 506                 sendto_one(source_p, ":%s NOTICE %s :Can't find %s",
 507                                 me.name, source_p->name, name);
 508 }
 509
 510 struct ConfItem *
 511 find_xline(const char *gecos, int counter)
 512 {
 513         struct ConfItem *aconf;
 514         dlink_node *ptr;
 515
 516         DLINK_FOREACH(ptr, xline_conf_list.head)
 517         {
 518                 aconf = ptr->data;
 519
 520                 if(match_esc(aconf->name, gecos))
 521                 {
 522                         if(counter)
 523                                 aconf->port++;
 524                         return aconf;
 525                 }
 526         }
 527
 528         return NULL;
 529 }
 530
 531 struct ConfItem *
 532 find_nick_resv(const char *name)
 533 {
 534         struct ConfItem *aconf;
 535         dlink_node *ptr;
 536
 537         DLINK_FOREACH(ptr, resv_conf_list.head)
 538         {
 539                 aconf = ptr->data;
 540
 541                 if(match_esc(aconf->name, name))
 542                 {
 543                         aconf->port++;
 544                         return aconf;
 545                 }
 546         }
 547
 548         return NULL;
 549 }
 550
 551 /* clean_resv_nick()
 552  *
 553  * inputs       - nick
 554  * outputs      - 1 if nick is vaild resv, 0 otherwise
 555  * side effects -
 556  */
 557 int
 558 clean_resv_nick(const char *nick)
 559 {
 560         char tmpch;
 561         int as = 0;
 562         int q = 0;
 563         int ch = 0;
 564
 565         if(*nick == '-' || IsDigit(*nick))
 566                 return 0;
 567
 568         while ((tmpch = *nick++))
 569         {
 570                 if(tmpch == '?' || tmpch == '@' || tmpch == '#')
 571                         q++;
 572                 else if(tmpch == '*')
 573                         as++;
 574                 else if(IsNickChar(tmpch))
 575                         ch++;
 576                 else
 577                         return 0;
 578         }
 579
 580         if(!ch && as)
 581                 return 0;
 582
 583         return 1;
 584 }
 585
 586 /* valid_wild_card_simple()
 587  *
 588  * inputs       - "thing" to test
 589  * outputs      - 1 if enough wildcards, else 0
 590  * side effects -
 591  */
 592 int
 593 valid_wild_card_simple(const char *data)
 594 {
 595         const char *p;
 596         char tmpch;
 597         int nonwild = 0;
 598
 599         /* check the string for minimum number of nonwildcard chars */
 600         p = data;
 601
 602         while((tmpch = *p++))
 603         {
 604                 /* found an escape, p points to the char after it, so skip
 605                  * that and move on.
 606                  */
 607                 if(tmpch == '\\')
 608                 {
 609                         p++;
 610                 }
 611                 else if(!IsMWildChar(tmpch))
 612                 {
 613                         /* if we have enough nonwildchars, return */
 614                         if(++nonwild >= ConfigFileEntry.min_nonwildcard_simple)
 615                                 return 1;
 616                 }
 617         }
 618
 619         return 0;
 620 }
 621
 622 time_t
 623 valid_temp_time(const char *p)
 624 {
 625         time_t result = 0;
 626
 627         while(*p)
 628         {
 629                 if(IsDigit(*p))
 630                 {
 631                         result *= 10;
 632                         result += ((*p) & 0xF);
 633                         p++;
 634                 }
 635                 else
 636                         return -1;
 637         }
 638
 639         if(result > (60 * 24 * 7 * 52))
 640                 result = (60 * 24 * 7 * 52);
 641
 642         return(result * 60);
 643 }
 644
 645 static void
 646 expire_temp_rxlines(void *unused)
 647 {
 648         struct ConfItem *aconf;
 649         dlink_node *ptr;
 650         dlink_node *next_ptr;
 651         int i;
 652
 653         HASH_WALK_SAFE(i, R_MAX, ptr, next_ptr, resvTable)
 654         {
 655                 aconf = ptr->data;
 656
 657                 if(aconf->hold && aconf->hold <= CurrentTime)
 658                 {
 659                         if(ConfigFileEntry.tkline_expire_notices)
 660                                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 661                                                 "Temporary RESV for [%s] expired",
 662                                                 aconf->name);
 663
 664                         free_conf(aconf);
 665                         dlinkDestroy(ptr, &resvTable[i]);
 666                 }
 667         }
 668         HASH_WALK_END
 669
 670         DLINK_FOREACH_SAFE(ptr, next_ptr, resv_conf_list.head)
 671         {
 672                 aconf = ptr->data;
 673
 674                 if(aconf->hold && aconf->hold <= CurrentTime)
 675                 {
 676                         if(ConfigFileEntry.tkline_expire_notices)
 677                                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 678                                                 "Temporary RESV for [%s] expired",
 679                                                 aconf->name);
 680                         free_conf(aconf);
 681                         dlinkDestroy(ptr, &resv_conf_list);
 682                 }
 683         }
 684
 685         DLINK_FOREACH_SAFE(ptr, next_ptr, xline_conf_list.head)
 686         {
 687                 aconf = ptr->data;
 688
 689                 if(aconf->hold && aconf->hold <= CurrentTime)
 690                 {
 691                         if(ConfigFileEntry.tkline_expire_notices)
 692                                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 693                                                 "Temporary X-line for [%s] expired",
 694                                                 aconf->name);
 695                         free_conf(aconf);
 696                         dlinkDestroy(ptr, &xline_conf_list);
 697                 }
 698         }
 699 }
 700
 701 unsigned long
 702 get_nd_count(void)
 703 {
 704         return(dlink_list_length(&nd_list));
 705 }
 706
 707
 708 void
 709 add_nd_entry(const char *name)
 710 {
 711         struct nd_entry *nd;
 712
 713         if(hash_find_nd(name) != NULL)
 714                 return;
 715
 716         nd = BlockHeapAlloc(nd_heap);
 717
 718         strlcpy(nd->name, name, sizeof(nd->name));
 719         nd->expire = CurrentTime + ConfigFileEntry.nick_delay;
 720
 721         /* this list is ordered */
 722         dlinkAddTail(nd, &nd->lnode, &nd_list);
 723         add_to_nd_hash(name, nd);
 724 }
 725
 726 void
 727 free_nd_entry(struct nd_entry *nd)
 728 {
 729         dlinkDelete(&nd->lnode, &nd_list);
 730         dlinkDelete(&nd->hnode, &ndTable[nd->hashv]);
 731         BlockHeapFree(nd_heap, nd);
 732 }
 733
 734 void
 735 expire_nd_entries(void *unused)
 736 {
 737         struct nd_entry *nd;
 738         dlink_node *ptr;
 739         dlink_node *next_ptr;
 740
 741         DLINK_FOREACH_SAFE(ptr, next_ptr, nd_list.head)
 742         {
 743                 nd = ptr->data;
 744
 745                 /* this list is ordered - we can stop when we hit the first
 746                  * entry that doesnt expire..
 747                  */
 748                 if(nd->expire > CurrentTime)
 749                         return;
 750
 751                 free_nd_entry(nd);
 752         }
 753 }
 754
 755 void
 756 add_tgchange(const char *host)
 757 {
 758         tgchange *target;
 759         patricia_node_t *pnode;
 760
 761         if(find_tgchange(host))
 762                 return;
 763
 764         target = MyMalloc(sizeof(tgchange));
 765         pnode = make_and_lookup(tgchange_tree, host);
 766
 767         pnode->data = target;
 768         target->pnode = pnode;
 769
 770         DupString(target->ip, host);
 771         target->expiry = CurrentTime + (60*60*12);
 772
 773         dlinkAdd(target, &target->node, &tgchange_list);
 774 }
 775
 776 tgchange *
 777 find_tgchange(const char *host)
 778 {
 779         patricia_node_t *pnode;
 780
 781         if((pnode = match_exact_string(tgchange_tree, host)))
 782                 return pnode->data;
 783
 784         return NULL;
 785 }
 786