src/hash.c

   1 /* hash.c - IRC network state database
   2  * Copyright 2000-2004 srvx Development Team
   3  *
   4  * This file is part of x3.
   5  *
   6  * srvx is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with srvx; if not, write to the Free Software Foundation,
  18  * Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
  19  */
  20
  21 #include "conf.h"
  22 #include "global.h"
  23 #include "hash.h"
  24 #include "log.h"
  25
  26 struct server *self;
  27 dict_t channels;
  28 dict_t clients;
  29 dict_t servers;
  30 unsigned int max_clients, invis_clients;
  31 time_t max_clients_time;
  32 struct userList curr_opers;
  33
  34 static void hash_cleanup(void);
  35
  36 void init_structs(void)
  37 {
  38     channels = dict_new();
  39     clients = dict_new();
  40     servers = dict_new();
  41     userList_init(&curr_opers);
  42     reg_exit_func(hash_cleanup);
  43 }
  44
  45 server_link_func_t *slf_list;
  46 unsigned int slf_size = 0, slf_used = 0;
  47
  48 void
  49 reg_server_link_func(server_link_func_t handler)
  50 {
  51     if (slf_used == slf_size) {
  52         if (slf_size) {
  53             slf_size <<= 1;
  54             slf_list = realloc(slf_list, slf_size*sizeof(server_link_func_t));
  55         } else {
  56             slf_size = 8;
  57             slf_list = malloc(slf_size*sizeof(server_link_func_t));
  58         }
  59     }
  60     slf_list[slf_used++] = handler;
  61 }
  62
  63 struct server*
  64 GetServerH(const char *name)
  65 {
  66     return dict_find(servers, name, NULL);
  67 }
  68
  69 new_user_func_t *nuf_list;
  70 unsigned int nuf_size = 0, nuf_used = 0;
  71
  72 void
  73 reg_new_user_func(new_user_func_t handler)
  74 {
  75     if (nuf_used == nuf_size) {
  76         if (nuf_size) {
  77             nuf_size <<= 1;
  78             nuf_list = realloc(nuf_list, nuf_size*sizeof(new_user_func_t));
  79         } else {
  80             nuf_size = 8;
  81             nuf_list = malloc(nuf_size*sizeof(new_user_func_t));
  82         }
  83     }
  84     nuf_list[nuf_used++] = handler;
  85 }
  86
  87 static nick_change_func_t *ncf2_list;
  88 static unsigned int ncf2_size = 0, ncf2_used = 0;
  89
  90 void
  91 reg_nick_change_func(nick_change_func_t handler)
  92 {
  93     if (ncf2_used == ncf2_size) {
  94         if (ncf2_size) {
  95             ncf2_size <<= 1;
  96             ncf2_list = realloc(ncf2_list, ncf2_size*sizeof(nick_change_func_t));
  97         } else {
  98             ncf2_size = 8;
  99             ncf2_list = malloc(ncf2_size*sizeof(nick_change_func_t));
 100         }
 101     }
 102     ncf2_list[ncf2_used++] = handler;
 103 }
 104
 105
 106 del_user_func_t *duf_list;
 107 unsigned int duf_size = 0, duf_used = 0;
 108
 109 void
 110 reg_del_user_func(del_user_func_t handler)
 111 {
 112     if (duf_used == duf_size) {
 113         if (duf_size) {
 114             duf_size <<= 1;
 115             duf_list = realloc(duf_list, duf_size*sizeof(del_user_func_t));
 116         } else {
 117             duf_size = 8;
 118             duf_list = malloc(duf_size*sizeof(del_user_func_t));
 119         }
 120     }
 121     duf_list[duf_used++] = handler;
 122 }
 123
 124 void
 125 unreg_del_user_func(del_user_func_t handler)
 126 {
 127     unsigned int i;
 128     for (i=0; i<duf_used; i++) {
 129         if (duf_list[i] == handler) break;
 130     }
 131     if (i == duf_used) return;
 132     memmove(duf_list+i, duf_list+i+1, (duf_used-i-1)*sizeof(duf_list[0]));
 133     duf_used--;
 134 }
 135
 136 /* reintroduces a user after it has been killed. */
 137 void
 138 ReintroduceUser(struct userNode *user)
 139 {
 140     struct mod_chanmode change;
 141     unsigned int n;
 142
 143     irc_user(user);
 144     mod_chanmode_init(&change);
 145     change.argc = 1;
 146     for (n = 0; n < user->channels.used; n++) {
 147         struct modeNode *mn = user->channels.list[n];
 148         irc_join(user, mn->channel);
 149         if (mn->modes) {
 150             change.args[0].mode = mn->modes;
 151             change.args[0].u.member = mn;
 152             mod_chanmode_announce(user, mn->channel, &change);
 153         }
 154     }
 155 }
 156
 157 void
 158 NickChange(struct userNode* user, const char *new_nick, int no_announce)
 159 {
 160     char *old_nick;
 161     unsigned int nn;
 162
 163     /* don't do anything if there's no change */
 164     old_nick = user->nick;
 165     if (!strncmp(new_nick, old_nick, NICKLEN))
 166         return;
 167
 168     /* remove old entry from clients dictionary */
 169     dict_remove(clients, old_nick);
 170 #if !defined(WITH_PROTOCOL_P10)
 171     /* Remove from uplink's clients dict */
 172     dict_remove(user->uplink->users, old_nick);
 173 #endif
 174     /* and reinsert */
 175     user->nick = strdup(new_nick);
 176     dict_insert(clients, user->nick, user);
 177 #if !defined(WITH_PROTOCOL_P10)
 178     dict_insert(user->uplink->users, user->nick, user);
 179 #endif
 180
 181     /* Make callbacks for nick changes.  Do this with new nick in
 182      * place because that is slightly more useful.
 183      */
 184     for (nn=0; nn<ncf2_used; nn++)
 185         ncf2_list[nn](user, old_nick);
 186     user->timestamp = now;
 187     if (IsLocal(user) && !no_announce)
 188         irc_nick(user, old_nick);
 189     free(old_nick);
 190 }
 191
 192 struct userNode *
 193 GetUserH(const char *nick)
 194 {
 195     return dict_find(clients, nick, NULL);
 196 }
 197
 198 static account_func_t account_func;
 199
 200 void
 201 reg_account_func(account_func_t handler)
 202 {
 203     if (account_func) {
 204         log_module(MAIN_LOG, LOG_WARNING, "Reregistering ACCOUNT handler.");
 205     }
 206     account_func = handler;
 207 }
 208
 209 void
 210 call_account_func(struct userNode *user, const char *stamp)
 211 {
 212     /* We've received an account stamp for a user; notify
 213        NickServ, which registers the sole account_func
 214        right now.
 215
 216        P10 Protocol violation if (user->modes & FLAGS_STAMPED) here.
 217     */
 218     if (account_func)
 219         account_func(user, stamp);
 220
 221 #ifdef WITH_PROTOCOL_P10
 222     /* Mark the user so we don't stamp it again. */
 223     user->modes |= FLAGS_STAMPED;
 224 #endif
 225 }
 226
 227 void
 228 StampUser(struct userNode *user, const char *stamp, time_t timestamp)
 229 {
 230 #ifdef WITH_PROTOCOL_P10
 231     /* The P10 protocol says we can't stamp users who already
 232        have a stamp. */
 233     if (IsStamped(user))
 234         return;
 235 #endif
 236
 237     irc_account(user, stamp, timestamp);
 238     user->modes |= FLAGS_STAMPED;
 239 }
 240
 241 void
 242 assign_fakehost(struct userNode *user, const char *host, int announce)
 243 {
 244     safestrncpy(user->fakehost, host, sizeof(user->fakehost));
 245     if (announce)
 246         irc_fakehost(user, host);
 247 }
 248
 249 static new_channel_func_t *ncf_list;
 250 static unsigned int ncf_size = 0, ncf_used = 0;
 251
 252 void
 253 reg_new_channel_func(new_channel_func_t handler)
 254 {
 255     if (ncf_used == ncf_size) {
 256         if (ncf_size) {
 257             ncf_size <<= 1;
 258             ncf_list = realloc(ncf_list, ncf_size*sizeof(ncf_list[0]));
 259         } else {
 260             ncf_size = 8;
 261             ncf_list = malloc(ncf_size*sizeof(ncf_list[0]));
 262         }
 263     }
 264     ncf_list[ncf_used++] = handler;
 265 }
 266
 267 static join_func_t *jf_list;
 268 static unsigned int jf_size = 0, jf_used = 0;
 269
 270 void
 271 reg_join_func(join_func_t handler)
 272 {
 273     if (jf_used == jf_size) {
 274         if (jf_size) {
 275             jf_size <<= 1;
 276             jf_list = realloc(jf_list, jf_size*sizeof(join_func_t));
 277         } else {
 278             jf_size = 8;
 279             jf_list = malloc(jf_size*sizeof(join_func_t));
 280         }
 281     }
 282     jf_list[jf_used++] = handler;
 283 }
 284
 285 int rel_age;
 286
 287 static void
 288 wipeout_channel(struct chanNode *cNode, time_t new_time, char **modes, unsigned int modec) {
 289     unsigned int orig_limit;
 290     chan_mode_t orig_modes;
 291     char orig_key[KEYLEN+1];
 292     unsigned int nn, argc;
 293
 294     /* nuke old topic */
 295     cNode->topic[0] = '\0';
 296     cNode->topic_nick[0] = '\0';
 297     cNode->topic_time = 0;
 298
 299     /* remember the old modes, and update them with the new */
 300     orig_modes = cNode->modes;
 301     orig_limit = cNode->limit;
 302     strcpy(orig_key, cNode->key);
 303     cNode->modes = 0;
 304     mod_chanmode(NULL, cNode, modes, modec, 0);
 305     cNode->timestamp = new_time;
 306
 307     /* remove our old ban list, replace it with the new one */
 308     for (nn=0; nn<cNode->banlist.used; nn++)
 309         free(cNode->banlist.list[nn]);
 310     cNode->banlist.used = 0;
 311
 312     /* remove our old exe,[t list, replace it with the new one */
 313     for (nn=0; nn<cNode->exemptlist.used; nn++)
 314         free(cNode->exemptlist.list[nn]);
 315     cNode->exemptlist.used = 0;
 316
 317     /* deop anybody in the channel now, but count services to reop */
 318     for (nn=argc=0; nn<cNode->members.used; nn++) {
 319         struct modeNode *mn = cNode->members.list[nn];
 320         if ((mn->modes & MODE_CHANOP) && IsService(mn->user) && IsLocal(mn->user))
 321             argc++;
 322     }
 323
 324     if (argc) {
 325         struct mod_chanmode *change;
 326
 327         change = mod_chanmode_alloc(argc);
 328         change->modes_clear = 0;
 329         change->modes_set = orig_modes;
 330         change->new_limit = orig_limit;
 331         strcpy(change->new_key, orig_key);
 332         for (nn = argc = 0; nn < cNode->members.used; ++nn) {
 333             struct modeNode *mn = cNode->members.list[nn];
 334             if ((mn->modes & MODE_CHANOP) && IsService(mn->user) && IsLocal(mn->user)) {
 335                 change->args[argc].mode = MODE_CHANOP;
 336                 change->args[argc].u.member = mn;
 337                 argc++;
 338             }
 339         }
 340         assert(argc == change->argc);
 341         change->args[0].u.member->modes &= ~MODE_CHANOP;
 342         mod_chanmode_announce(change->args[0].u.member->user, cNode, change);
 343         mod_chanmode_free(change);
 344     }
 345 }
 346
 347 struct chanNode *
 348 AddChannel(const char *name, time_t time_, const char *modes, char *banlist, char *exemptlist)
 349 {
 350     struct chanNode *cNode;
 351     char new_modes[MAXLEN], *argv[MAXNUMPARAMS];
 352     unsigned int nn;
 353
 354     if (!IsChannelName(name)) {
 355         log_module(MAIN_LOG, LOG_ERROR, "Somebody asked to add channel '%s', which isn't a channel name!", name);
 356         return NULL;
 357     }
 358     if (!modes)
 359         modes = "";
 360
 361     safestrncpy(new_modes, modes, sizeof(new_modes));
 362     nn = split_line(new_modes, 0, ArrayLength(argv), argv);
 363     if (!(cNode = GetChannel(name))) {
 364         cNode = calloc(1, sizeof(*cNode) + strlen(name));
 365         strcpy(cNode->name, name);
 366         banList_init(&cNode->banlist);
 367         exemptList_init(&cNode->exemptlist);
 368         modeList_init(&cNode->members);
 369         mod_chanmode(NULL, cNode, argv, nn, 0);
 370         dict_insert(channels, cNode->name, cNode);
 371         cNode->timestamp = time_;
 372         rel_age = 1;
 373     } else if (cNode->timestamp > time_) {
 374         wipeout_channel(cNode, time_, argv, nn);
 375         rel_age = 1;
 376     } else if (cNode->timestamp == time_) {
 377         mod_chanmode(NULL, cNode, argv, nn, 0);
 378         rel_age = 0;
 379     } else {
 380         rel_age = -1;
 381     }
 382
 383     /* rel_age is the relative ages of our channel data versus what is
 384      * in a BURST command.  1 means ours is younger, 0 means both are
 385      * the same age, -1 means ours is older. */
 386
 387     /* if it's a new or updated channel, make callbacks */
 388     if (rel_age > 0)
 389         for (nn=0; nn<ncf_used; nn++)
 390             ncf_list[nn](cNode);
 391
 392     /* go through list of bans and add each one */
 393     if (banlist && (rel_age >= 0)) {
 394         for (nn=0; banlist[nn];) {
 395             char *ban = banlist + nn;
 396             struct banNode *bn;
 397             while (banlist[nn] != ' ' && banlist[nn])
 398                 nn++;
 399             while (banlist[nn] == ' ')
 400                 banlist[nn++] = 0;
 401             bn = calloc(1, sizeof(*bn));
 402             safestrncpy(bn->ban, ban, sizeof(bn->ban));
 403             safestrncpy(bn->who, "<unknown>", sizeof(bn->who));
 404             bn->set = now;
 405             banList_append(&cNode->banlist, bn);
 406         }
 407     }
 408
 409     /* go through list of exempts and add each one */
 410     if (exemptlist && (rel_age >= 0)) {
 411         for (nn=0; exemptlist[nn];) {
 412             char *exempt = exemptlist + nn;
 413             struct exemptNode *en;
 414             while (exemptlist[nn] != ' ' && exemptlist[nn])
 415                 nn++;
 416             while (exemptlist[nn] == ' ')
 417                 exemptlist[nn++] = 0;
 418             en = calloc(1, sizeof(*en));
 419             safestrncpy(en->exempt, exempt, sizeof(en->exempt));
 420             safestrncpy(en->who, "<unknown>", sizeof(en->who));
 421             en->set = now;
 422             exemptList_append(&cNode->exemptlist, en);
 423         }
 424     }
 425
 426     return cNode;
 427 }
 428
 429 static del_channel_func_t *dcf_list;
 430 static unsigned int dcf_size = 0, dcf_used = 0;
 431
 432 void
 433 reg_del_channel_func(del_channel_func_t handler)
 434 {
 435     if (dcf_used == dcf_size) {
 436         if (dcf_size) {
 437             dcf_size <<= 1;
 438             dcf_list = realloc(dcf_list, dcf_size*sizeof(dcf_list[0]));
 439         } else {
 440             dcf_size = 8;
 441             dcf_list = malloc(dcf_size*sizeof(dcf_list[0]));
 442         }
 443     }
 444     dcf_list[dcf_used++] = handler;
 445 }
 446
 447 static void
 448 DelChannel(struct chanNode *channel)
 449 {
 450     unsigned int n;
 451
 452     dict_remove(channels, channel->name);
 453
 454     if (channel->members.used || channel->locks) {
 455         log_module(MAIN_LOG, LOG_ERROR, "Warning: deleting channel %s with %d users and %d locks remaining.", channel->name, channel->members.used, channel->locks);
 456     }
 457
 458     /* go through all channel members and delete them from the channel */
 459     for (n=channel->members.used; n>0; )
 460         DelChannelUser(channel->members.list[--n]->user, channel, false, 1);
 461
 462     /* delete all channel bans */
 463     for (n=channel->banlist.used; n>0; )
 464         free(channel->banlist.list[--n]);
 465     channel->banlist.used = 0;
 466
 467     /* delete all channel exempts */
 468     for (n=channel->exemptlist.used; n>0; )
 469         free(channel->exemptlist.list[--n]);
 470     channel->exemptlist.used = 0;
 471
 472     for (n=0; n<dcf_used; n++)
 473         dcf_list[n](channel);
 474
 475     modeList_clean(&channel->members);
 476     banList_clean(&channel->banlist);
 477     exemptList_clean(&channel->exemptlist);
 478     free(channel);
 479 }
 480
 481 struct modeNode *
 482 AddChannelUser(struct userNode *user, struct chanNode* channel)
 483 {
 484         struct modeNode *mNode;
 485         unsigned int n;
 486
 487         mNode = GetUserMode(channel, user);
 488         if (mNode)
 489             return mNode;
 490
 491         mNode = malloc(sizeof(*mNode));
 492
 493         /* set up modeNode */
 494         mNode->channel = channel;
 495         mNode->user = user;
 496         mNode->modes = 0;
 497         mNode->idle_since = now;
 498
 499         /* Add modeNode to channel and to user.
 500          * We have to do this before calling join funcs in case the
 501          * modeNode is manipulated (e.g. chanserv ops the user).
 502          */
 503         modeList_append(&channel->members, mNode);
 504         modeList_append(&user->channels, mNode);
 505
 506         if (channel->members.used == 1
 507             && !(channel->modes & MODE_REGISTERED))
 508             mNode->modes |= MODE_CHANOP;
 509
 510         for (n=0; n<jf_used; n++) {
 511             /* Callbacks return true if they kick or kill the user,
 512              * and we can continue without removing mNode. */
 513             if (jf_list[n](mNode))
 514                 return NULL;
 515         }
 516
 517         if (IsLocal(user))
 518             irc_join(user, channel);
 519
 520         return mNode;
 521 }
 522
 523 static part_func_t *pf_list;
 524 static unsigned int pf_size = 0, pf_used = 0;
 525
 526 void
 527 reg_part_func(part_func_t handler)
 528 {
 529     if (pf_used == pf_size) {
 530         if (pf_size) {
 531             pf_size <<= 1;
 532             pf_list = realloc(pf_list, pf_size*sizeof(part_func_t));
 533         } else {
 534             pf_size = 8;
 535             pf_list = malloc(pf_size*sizeof(part_func_t));
 536         }
 537     }
 538     pf_list[pf_used++] = handler;
 539 }
 540
 541 void
 542 unreg_part_func(part_func_t handler)
 543 {
 544     unsigned int i;
 545     for (i=0; i<pf_used; i++)
 546         if (pf_list[i] == handler)
 547             break;
 548     if (i == pf_used)
 549         return;
 550     memmove(pf_list+i, pf_list+i+1, (pf_used-i-1)*sizeof(pf_list[0]));
 551     pf_used--;
 552 }
 553
 554 void
 555 LockChannel(struct chanNode* channel)
 556 {
 557     channel->locks++;
 558 }
 559
 560 void
 561 UnlockChannel(struct chanNode *channel)
 562 {
 563     assert(channel->locks > 0);
 564     if (!--channel->locks && !channel->members.used)
 565         DelChannel(channel);
 566 }
 567
 568 void
 569 DelChannelUser(struct userNode* user, struct chanNode* channel, const char *reason, int deleting)
 570 {
 571     struct modeNode* mNode;
 572     unsigned int n;
 573
 574     if (reason)
 575         irc_part(user, channel, reason);
 576
 577     mNode = GetUserMode(channel, user);
 578
 579     /* Sometimes we get a PART when the user has been KICKed.
 580      * In this case, we get no usermode, and should not try to free it.
 581      */
 582     if (!mNode)
 583         return;
 584
 585     /* remove modeNode from channel and user */
 586     modeList_remove(&channel->members, mNode);
 587     modeList_remove(&user->channels, mNode);
 588
 589     /* make callbacks */
 590     for (n=0; n<pf_used; n++)
 591         pf_list[n](mNode, reason);
 592
 593     /* free memory */
 594     free(mNode);
 595
 596     if (!deleting && !channel->members.used && !channel->locks && !(channel->modes & MODE_REGISTERED))
 597         DelChannel(channel);
 598 }
 599
 600 void
 601 KickChannelUser(struct userNode* target, struct chanNode* channel, struct userNode *kicker, const char *why)
 602 {
 603     if (!target || !channel || IsService(target) || !GetUserMode(channel, target))
 604         return;
 605     /* don't remove them from the channel, since the server will send a PART */
 606     irc_kick(kicker, target, channel, why);
 607
 608     if (IsLocal(target))
 609     {
 610         /* NULL reason because we don't want a PART message to be
 611            sent by DelChannelUser. */
 612         DelChannelUser(target, channel, NULL, 0);
 613     }
 614 }
 615
 616 static kick_func_t *kf_list;
 617 static unsigned int kf_size = 0, kf_used = 0;
 618
 619 void
 620 reg_kick_func(kick_func_t handler)
 621 {
 622     if (kf_used == kf_size) {
 623         if (kf_size) {
 624             kf_size <<= 1;
 625             kf_list = realloc(kf_list, kf_size*sizeof(kick_func_t));
 626         } else {
 627             kf_size = 8;
 628             kf_list = malloc(kf_size*sizeof(kick_func_t));
 629         }
 630     }
 631     kf_list[kf_used++] = handler;
 632 }
 633
 634 void
 635 ChannelUserKicked(struct userNode* kicker, struct userNode* victim, struct chanNode* channel)
 636 {
 637     unsigned int n;
 638     struct modeNode *mn;
 639
 640     if (!victim || !channel || IsService(victim) || !GetUserMode(channel, victim))
 641         return;
 642
 643     /* Update the kicker's idle time (kicker may be null if it was a server) */
 644     if (kicker && (mn = GetUserMode(channel, kicker)))
 645         mn->idle_since = now;
 646
 647     for (n=0; n<kf_used; n++)
 648         kf_list[n](kicker, victim, channel);
 649
 650     DelChannelUser(victim, channel, 0, 0);
 651
 652     if (IsLocal(victim))
 653         irc_part(victim, channel, NULL);
 654 }
 655
 656 int ChannelBanExists(struct chanNode *channel, const char *ban)
 657 {
 658     unsigned int n;
 659
 660     for (n = 0; n < channel->banlist.used; n++)
 661         if (match_ircglobs(channel->banlist.list[n]->ban, ban))
 662             return 1;
 663     return 0;
 664 }
 665
 666 int ChannelExemptExists(struct chanNode *channel, const char *exempt)
 667 {
 668     unsigned int n;
 669
 670     for (n = 0; n < channel->exemptlist.used; n++)
 671         if (match_ircglobs(channel->exemptlist.list[n]->exempt, exempt))
 672             return 1;
 673     return 0;
 674 }
 675
 676 static topic_func_t *tf_list;
 677 static unsigned int tf_size = 0, tf_used = 0;
 678
 679 void
 680 reg_topic_func(topic_func_t handler)
 681 {
 682     if (tf_used == tf_size) {
 683         if (tf_size) {
 684             tf_size <<= 1;
 685             tf_list = realloc(tf_list, tf_size*sizeof(topic_func_t));
 686         } else {
 687             tf_size = 8;
 688             tf_list = malloc(tf_size*sizeof(topic_func_t));
 689         }
 690     }
 691     tf_list[tf_used++] = handler;
 692 }
 693
 694 void
 695 SetChannelTopic(struct chanNode *channel, struct userNode *service, struct userNode *user, const char *topic, int announce)
 696 {
 697     unsigned int n;
 698     struct modeNode *mn;
 699     char old_topic[TOPICLEN+1];
 700
 701     safestrncpy(old_topic, channel->topic, sizeof(old_topic));
 702     safestrncpy(channel->topic, topic, sizeof(channel->topic));
 703     channel->topic_time = now;
 704
 705     if (user) {
 706         safestrncpy(channel->topic_nick, user->nick, sizeof(channel->topic_nick));
 707
 708         /* Update the setter's idle time */
 709         if ((mn = GetUserMode(channel, user)))
 710             mn->idle_since = now;
 711     }
 712
 713     if (announce) {
 714         /* We don't really care if a local user messes with the topic,
 715          * so don't call the tf_list functions. */
 716         irc_topic(service, user, channel, topic);
 717     } else {
 718         for (n=0; n<tf_used; n++)
 719             if (tf_list[n](user, channel, old_topic))
 720                 break;
 721     }
 722 }
 723
 724 struct chanNode *
 725 GetChannel(const char *name)
 726 {
 727     return dict_find(channels, name, NULL);
 728 }
 729
 730 struct modeNode *
 731 GetUserMode(struct chanNode *channel, struct userNode *user)
 732 {
 733     unsigned int n;
 734     struct modeNode *mn = NULL;
 735
 736     verify(channel);
 737     verify(channel->members.list);
 738     verify(user);
 739     verify(user->channels.list);
 740     if (channel->members.used < user->channels.used) {
 741         for (n=0; n<channel->members.used; n++) {
 742             verify(channel->members.list[n]);
 743             if (user == channel->members.list[n]->user) {
 744                 mn = channel->members.list[n];
 745                 break;
 746             }
 747         }
 748     } else {
 749         for (n=0; n<user->channels.used; n++) {
 750             verify(user->channels.list[n]);
 751             if (channel == user->channels.list[n]->channel) {
 752                 mn = user->channels.list[n];
 753                 break;
 754             }
 755         }
 756     }
 757     return mn;
 758 }
 759
 760 struct userNode *IsInChannel(struct chanNode *channel, struct userNode *user)
 761 {
 762     unsigned int n;
 763
 764     verify(channel);
 765     verify(channel->members.list);
 766     verify(user);
 767     verify(user->channels.list);
 768     if (channel->members.used < user->channels.used) {
 769         for (n=0; n<channel->members.used; n++) {
 770             verify(channel->members.list[n]);
 771             if (user == channel->members.list[n]->user) {
 772                 return(user);
 773             }
 774         }
 775     } else {
 776         for (n=0; n<user->channels.used; n++) {
 777             verify(user->channels.list[n]);
 778             if (channel == user->channels.list[n]->channel) {
 779                 return(user);
 780             }
 781         }
 782     }
 783     return NULL;
 784 }
 785
 786 DEFINE_LIST(userList, struct userNode*)
 787 DEFINE_LIST(modeList, struct modeNode*)
 788 DEFINE_LIST(banList, struct banNode*)
 789 DEFINE_LIST(exemptList, struct exemptNode*)
 790 DEFINE_LIST(channelList, struct chanNode*)
 791 DEFINE_LIST(serverList, struct server*)
 792
 793 static void
 794 hash_cleanup(void)
 795 {
 796     dict_iterator_t it, next;
 797
 798     DelServer(self, 0, NULL);
 799     for (it = dict_first(channels); it; it = next) {
 800         next = iter_next(it);
 801         DelChannel(iter_data(it));
 802     }
 803     dict_delete(channels);
 804     dict_delete(clients);
 805     dict_delete(servers);
 806     userList_clean(&curr_opers);
 807
 808     free(slf_list);
 809     free(nuf_list);
 810     free(ncf2_list);
 811     free(duf_list);
 812     free(ncf_list);
 813     free(jf_list);
 814     free(dcf_list);
 815     free(pf_list);
 816     free(kf_list);
 817     free(tf_list);
 818 }