src/channels.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2008 InspIRCd Development Team
   6  * See: http://www.inspircd.org/wiki/index.php/Credits
   7  *
   8  * This program is free but copyrighted software; see
   9  *            the file COPYING for details.
  10  *
  11  * ---------------------------------------------------
  12  */
  13
  14 /* $Core: libIRCDchannels */
  15
  16 #include "inspircd.h"
  17 #include <stdarg.h>
  18 #include "wildcard.h"
  19 #include "mode.h"
  20
  21 Channel::Channel(InspIRCd* Instance, const std::string &cname, time_t ts) : ServerInstance(Instance)
  22 {
  23         chan_hash::iterator findchan = ServerInstance->chanlist->find(cname);
  24         if (findchan != Instance->chanlist->end())
  25                 throw CoreException("Cannot create duplicate channel " + cname);
  26
  27         (*(ServerInstance->chanlist))[cname.c_str()] = this;
  28         strlcpy(this->name, cname.c_str(), CHANMAX);
  29         this->created = ts ? ts : ServerInstance->Time();
  30         this->age = this->created;
  31
  32
  33
  34
  35         *topic = *setby = *key = 0;
  36         maxbans = topicset = limit = 0;
  37         memset(&modes,0,64);
  38 }
  39
  40 void Channel::SetMode(char mode,bool mode_on)
  41 {
  42         modes[mode-65] = mode_on;
  43         if (!mode_on)
  44                 this->SetModeParam(mode,"",false);
  45 }
  46
  47
  48 void Channel::SetModeParam(char mode,const char* parameter,bool mode_on)
  49 {
  50         CustomModeList::iterator n = custom_mode_params.find(mode);
  51
  52         if (mode_on)
  53         {
  54                 if (n == custom_mode_params.end())
  55                         custom_mode_params[mode] = strdup(parameter);
  56         }
  57         else
  58         {
  59                 if (n != custom_mode_params.end())
  60                 {
  61                         free(n->second);
  62                         custom_mode_params.erase(n);
  63                 }
  64         }
  65 }
  66
  67 bool Channel::IsModeSet(char mode)
  68 {
  69         return modes[mode-65];
  70 }
  71
  72 std::string Channel::GetModeParameter(char mode)
  73 {
  74         switch (mode)
  75         {
  76                 case 'k':
  77                         return this->key;
  78                 case 'l':
  79                         return ConvToStr(this->limit);
  80                 default:
  81                         CustomModeList::iterator n = custom_mode_params.find(mode);
  82                         if (n != custom_mode_params.end())
  83                                 return n->second;
  84                         return "";
  85                 break;
  86         }
  87 }
  88
  89 long Channel::GetUserCounter()
  90 {
  91         return (this->internal_userlist.size());
  92 }
  93
  94 void Channel::AddUser(User* user)
  95 {
  96         internal_userlist[user] = user->nick;
  97 }
  98
  99 unsigned long Channel::DelUser(User* user)
 100 {
 101         CUListIter a = internal_userlist.find(user);
 102
 103         if (a != internal_userlist.end())
 104         {
 105                 internal_userlist.erase(a);
 106                 /* And tidy any others... */
 107                 DelOppedUser(user);
 108                 DelHalfoppedUser(user);
 109                 DelVoicedUser(user);
 110         }
 111
 112         return internal_userlist.size();
 113 }
 114
 115 bool Channel::HasUser(User* user)
 116 {
 117         return (internal_userlist.find(user) != internal_userlist.end());
 118 }
 119
 120 void Channel::AddOppedUser(User* user)
 121 {
 122         internal_op_userlist[user] = user->nick;
 123 }
 124
 125 void Channel::DelOppedUser(User* user)
 126 {
 127         CUListIter a = internal_op_userlist.find(user);
 128         if (a != internal_op_userlist.end())
 129         {
 130                 internal_op_userlist.erase(a);
 131                 return;
 132         }
 133 }
 134
 135 void Channel::AddHalfoppedUser(User* user)
 136 {
 137         internal_halfop_userlist[user] = user->nick;
 138 }
 139
 140 void Channel::DelHalfoppedUser(User* user)
 141 {
 142         CUListIter a = internal_halfop_userlist.find(user);
 143
 144         if (a != internal_halfop_userlist.end())
 145         {
 146                 internal_halfop_userlist.erase(a);
 147         }
 148 }
 149
 150 void Channel::AddVoicedUser(User* user)
 151 {
 152         internal_voice_userlist[user] = user->nick;
 153 }
 154
 155 void Channel::DelVoicedUser(User* user)
 156 {
 157         CUListIter a = internal_voice_userlist.find(user);
 158
 159         if (a != internal_voice_userlist.end())
 160         {
 161                 internal_voice_userlist.erase(a);
 162         }
 163 }
 164
 165 CUList* Channel::GetUsers()
 166 {
 167         return &internal_userlist;
 168 }
 169
 170 CUList* Channel::GetOppedUsers()
 171 {
 172         return &internal_op_userlist;
 173 }
 174
 175 CUList* Channel::GetHalfoppedUsers()
 176 {
 177         return &internal_halfop_userlist;
 178 }
 179
 180 CUList* Channel::GetVoicedUsers()
 181 {
 182         return &internal_voice_userlist;
 183 }
 184
 185 void Channel::SetDefaultModes()
 186 {
 187         ServerInstance->Logs->Log("CHANNELS", DEBUG, "SetDefaultModes %s", ServerInstance->Config->DefaultModes);
 188         irc::spacesepstream list(ServerInstance->Config->DefaultModes);
 189         std::string modeseq;
 190         std::string parameter;
 191
 192         list.GetToken(modeseq);
 193
 194         for (std::string::iterator n = modeseq.begin(); n != modeseq.end(); ++n)
 195         {
 196                 ModeHandler* mode = ServerInstance->Modes->FindMode(*n, MODETYPE_CHANNEL);
 197                 if (mode)
 198                 {
 199                         if (mode->GetNumParams(true))
 200                                 list.GetToken(parameter);
 201                         else
 202                                 parameter.clear();
 203
 204                         mode->OnModeChange(ServerInstance->FakeClient, ServerInstance->FakeClient, this, parameter, true);
 205                 }
 206         }
 207 }
 208
 209 /*
 210  * add a channel to a user, creating the record for it if needed and linking
 211  * it to the user record
 212  */
 213 Channel* Channel::JoinUser(InspIRCd* Instance, User *user, const char* cn, bool override, const char* key, bool bursting, time_t TS)
 214 {
 215         if (!user || !cn)
 216                 return NULL;
 217
 218         char cname[MAXBUF];
 219         int MOD_RESULT = 0;
 220         std::string privs;
 221         Channel *Ptr;
 222
 223         /*
 224          * We don't restrict the number of channels that remote users or users that are override-joining may be in.
 225          * We restrict local users to MaxChans channels.
 226          * We restrict local operators to OperMaxChans channels.
 227          * This is a lot more logical than how it was formerly. -- w00t
 228          */
 229         if (IS_LOCAL(user) && !override)
 230         {
 231                 if (user->GetMaxChans())
 232                 {
 233                         if (user->chans.size() >= user->GetMaxChans())
 234                         {
 235                                 user->WriteNumeric(405, "%s %s :You are on too many channels",user->nick, cn);
 236                                 return NULL;
 237                         }
 238                 }
 239                 else
 240                 {
 241                         if (IS_OPER(user))
 242                         {
 243                                 if (user->chans.size() >= Instance->Config->OperMaxChans)
 244                                 {
 245                                         user->WriteNumeric(405, "%s %s :You are on too many channels",user->nick, cn);
 246                                         return NULL;
 247                                 }
 248                         }
 249                         else
 250                         {
 251                                 if (user->chans.size() >= Instance->Config->MaxChans)
 252                                 {
 253                                         user->WriteNumeric(405, "%s %s :You are on too many channels",user->nick, cn);
 254                                         return NULL;
 255                                 }
 256                         }
 257                 }
 258         }
 259
 260         strlcpy(cname, cn, CHANMAX);
 261         Ptr = Instance->FindChan(cname);
 262
 263         if (!Ptr)
 264         {
 265                 /*
 266                  * Fix: desync bug was here, don't set @ on remote users - spanningtree handles their permissions. bug #358. -- w00t
 267                  */
 268                 if (!IS_LOCAL(user))
 269                 {
 270                         if (!TS)
 271                                 Instance->Logs->Log("CHANNEL",DEBUG,"*** BUG *** Channel::JoinUser called for REMOTE user '%s' on channel '%s' but no TS given!", user->nick, cn);
 272                 }
 273                 else
 274                 {
 275                         privs = "@";
 276                 }
 277
 278                 if (IS_LOCAL(user) && override == false)
 279                 {
 280                         MOD_RESULT = 0;
 281                         FOREACH_RESULT_I(Instance,I_OnUserPreJoin,OnUserPreJoin(user,NULL,cname,privs));
 282                         if (MOD_RESULT == 1)
 283                                 return NULL;
 284                 }
 285
 286                 Ptr = new Channel(Instance, cname, TS);
 287         }
 288         else
 289         {
 290                 /* Already on the channel */
 291                 if (Ptr->HasUser(user))
 292                         return NULL;
 293
 294                 /*
 295                  * remote users are allowed us to bypass channel modes
 296                  * and bans (used by servers)
 297                  */
 298                 if (IS_LOCAL(user) && override == false)
 299                 {
 300                         MOD_RESULT = 0;
 301                         FOREACH_RESULT_I(Instance,I_OnUserPreJoin,OnUserPreJoin(user,Ptr,cname,privs));
 302                         if (MOD_RESULT == 1)
 303                         {
 304                                 return NULL;
 305                         }
 306                         else if (MOD_RESULT == 0)
 307                         {
 308                                 if (*Ptr->key)
 309                                 {
 310                                         MOD_RESULT = 0;
 311                                         FOREACH_RESULT_I(Instance,I_OnCheckKey,OnCheckKey(user, Ptr, key ? key : ""));
 312                                         if (!MOD_RESULT)
 313                                         {
 314                                                 if ((!key) || strcmp(key,Ptr->key))
 315                                                 {
 316                                                         user->WriteNumeric(475, "%s %s :Cannot join channel (Incorrect channel key)",user->nick, Ptr->name);
 317                                                         return NULL;
 318                                                 }
 319                                         }
 320                                 }
 321                                 if (Ptr->IsModeSet('i'))
 322                                 {
 323                                         MOD_RESULT = 0;
 324                                         FOREACH_RESULT_I(Instance,I_OnCheckInvite,OnCheckInvite(user, Ptr));
 325                                         if (!MOD_RESULT)
 326                                         {
 327                                                 if (!user->IsInvited(Ptr->name))
 328                                                 {
 329                                                         user->WriteNumeric(473, "%s %s :Cannot join channel (Invite only)",user->nick, Ptr->name);
 330                                                         return NULL;
 331                                                 }
 332                                         }
 333                                         user->RemoveInvite(Ptr->name);
 334                                 }
 335                                 if (Ptr->limit)
 336                                 {
 337                                         MOD_RESULT = 0;
 338                                         FOREACH_RESULT_I(Instance,I_OnCheckLimit,OnCheckLimit(user, Ptr));
 339                                         if (!MOD_RESULT)
 340                                         {
 341                                                 if (Ptr->GetUserCounter() >= Ptr->limit)
 342                                                 {
 343                                                         user->WriteNumeric(471, "%s %s :Cannot join channel (Channel is full)",user->nick, Ptr->name);
 344                                                         return NULL;
 345                                                 }
 346                                         }
 347                                 }
 348                                 if (Ptr->bans.size())
 349                                 {
 350                                         if (Ptr->IsBanned(user))
 351                                         {
 352                                                 user->WriteNumeric(474, "%s %s :Cannot join channel (You're banned)",user->nick, Ptr->name);
 353                                                 return NULL;
 354                                         }
 355                                 }
 356                         }
 357                 }
 358         }
 359
 360         /* As spotted by jilles, dont bother to set this on remote users */
 361         if (IS_LOCAL(user) && Ptr->GetUserCounter() == 0)
 362                 Ptr->SetDefaultModes();
 363
 364         return Channel::ForceChan(Instance, Ptr, user, privs, bursting);
 365 }
 366
 367 Channel* Channel::ForceChan(InspIRCd* Instance, Channel* Ptr, User* user, const std::string &privs, bool bursting)
 368 {
 369         std::string nick = user->nick;
 370         bool silent = false;
 371
 372         Ptr->AddUser(user);
 373
 374         /* Just in case they have no permissions */
 375         user->chans[Ptr] = 0;
 376
 377         for (std::string::const_iterator x = privs.begin(); x != privs.end(); x++)
 378         {
 379                 const char status = *x;
 380                 ModeHandler* mh = Instance->Modes->FindPrefix(status);
 381                 if (mh)
 382                 {
 383                         /* Set, and make sure that the mode handler knows this mode was now set */
 384                         Ptr->SetPrefix(user, status, mh->GetPrefixRank(), true);
 385                         mh->OnModeChange(Instance->FakeClient, Instance->FakeClient, Ptr, nick, true);
 386
 387                         switch (mh->GetPrefix())
 388                         {
 389                                 /* These logic ops are SAFE IN THIS CASE because if the entry doesnt exist,
 390                                  * addressing operator[] creates it. If they do exist, it points to it.
 391                                  * At all other times where we dont want to create an item if it doesnt exist, we
 392                                  * must stick to ::find().
 393                                  */
 394                                 case '@':
 395                                         user->chans[Ptr] |= UCMODE_OP;
 396                                 break;
 397                                 case '%':
 398                                         user->chans[Ptr] |= UCMODE_HOP;
 399                                 break;
 400                                 case '+':
 401                                         user->chans[Ptr] |= UCMODE_VOICE;
 402                                 break;
 403                         }
 404                 }
 405         }
 406
 407         FOREACH_MOD_I(Instance,I_OnUserJoin,OnUserJoin(user, Ptr, bursting, silent));
 408
 409         if (!silent)
 410                 Ptr->WriteChannel(user,"JOIN :%s",Ptr->name);
 411
 412         /* Theyre not the first ones in here, make sure everyone else sees the modes we gave the user */
 413         std::string ms = Instance->Modes->ModeString(user, Ptr);
 414         if ((Ptr->GetUserCounter() > 1) && (ms.length()))
 415                 Ptr->WriteAllExceptSender(user, true, 0, "MODE %s +%s", Ptr->name, ms.c_str());
 416
 417         /* Major improvement by Brain - we dont need to be calculating all this pointlessly for remote users */
 418         if (IS_LOCAL(user))
 419         {
 420                 if (Ptr->topicset)
 421                 {
 422                         user->WriteNumeric(332, "%s %s :%s", user->nick, Ptr->name, Ptr->topic);
 423                         user->WriteNumeric(333, "%s %s %s %lu", user->nick, Ptr->name, Ptr->setby, (unsigned long)Ptr->topicset);
 424                 }
 425                 Ptr->UserList(user);
 426         }
 427         FOREACH_MOD_I(Instance,I_OnPostJoin,OnPostJoin(user, Ptr));
 428         return Ptr;
 429 }
 430
 431 bool Channel::IsBanned(User* user)
 432 {
 433         char mask[MAXBUF];
 434         int MOD_RESULT = 0;
 435         FOREACH_RESULT(I_OnCheckBan,OnCheckBan(user, this));
 436         if (!MOD_RESULT)
 437         {
 438                 snprintf(mask, MAXBUF, "%s!%s@%s", user->nick, user->ident, user->GetIPString());
 439                 for (BanList::iterator i = this->bans.begin(); i != this->bans.end(); i++)
 440                 {
 441                         /* This allows CIDR ban matching
 442                          *
 443                          *        Full masked host                      Full unmasked host                   IP with/without CIDR
 444                          */
 445                         if ((match(user->GetFullHost(),i->data)) || (match(user->GetFullRealHost(),i->data)) || (match(mask, i->data, true)))
 446                         {
 447                                 return true;
 448                         }
 449                 }
 450         }
 451         return false;
 452 }
 453
 454 bool Channel::IsExtBanned(User *user, char type)
 455 {
 456         // XXX. do we need events?
 457         char mask[MAXBUF];
 458         char *maskptr;
 459
 460         snprintf(mask, MAXBUF, "%s!%s@%s", user->nick, user->ident, user->GetIPString());
 461
 462         for (BanList::iterator i = this->bans.begin(); i != this->bans.end(); i++)
 463         {
 464                 if (i->data[0] != type || i->data[1] != ':')
 465                         continue;
 466
 467                 // Iterate past char and : to get to the mask without doing a data copy(!)
 468                 maskptr = i->data;
 469                 maskptr++; // past the char
 470                 maskptr++; // past the :
 471
 472                 /* This allows CIDR ban matching
 473                  *
 474                  *        Full masked host                             Full unmasked host                     IP with/without CIDR
 475                  */
 476                 if ((match(user->GetFullHost(), maskptr)) || (match(user->GetFullRealHost(), maskptr)) || (match(mask, maskptr, true)))
 477                 {
 478                         return true;
 479                 }
 480         }
 481
 482         return false;
 483 }
 484
 485 /* Channel::PartUser
 486  * remove a channel from a users record, and return the number of users left.
 487  * Therefore, if this function returns 0 the caller should delete the Channel.
 488  */
 489 long Channel::PartUser(User *user, const char* reason)
 490 {
 491         bool silent = false;
 492
 493         if (!user)
 494                 return this->GetUserCounter();
 495
 496         UCListIter i = user->chans.find(this);
 497         if (i != user->chans.end())
 498         {
 499                 FOREACH_MOD(I_OnUserPart,OnUserPart(user, this, reason ? reason : "", silent));
 500
 501                 if (!silent)
 502                         this->WriteChannel(user, "PART %s%s%s", this->name, reason ? " :" : "", reason ? reason : "");
 503
 504                 user->chans.erase(i);
 505                 this->RemoveAllPrefixes(user);
 506         }
 507
 508         if (!this->DelUser(user)) /* if there are no users left on the channel... */
 509         {
 510                 chan_hash::iterator iter = ServerInstance->chanlist->find(this->name);
 511                 /* kill the record */
 512                 if (iter != ServerInstance->chanlist->end())
 513                 {
 514                         int MOD_RESULT = 0;
 515                         FOREACH_RESULT_I(ServerInstance,I_OnChannelPreDelete, OnChannelPreDelete(this));
 516                         if (MOD_RESULT == 1)
 517                                 return 1; // delete halted by module
 518                         FOREACH_MOD(I_OnChannelDelete, OnChannelDelete(this));
 519                         ServerInstance->chanlist->erase(iter);
 520                 }
 521                 return 0;
 522         }
 523
 524         return this->GetUserCounter();
 525 }
 526
 527 long Channel::ServerKickUser(User* user, const char* reason, bool triggerevents, const char* servername)
 528 {
 529         bool silent = false;
 530
 531         if (!user || !reason)
 532                 return this->GetUserCounter();
 533
 534         if (IS_LOCAL(user))
 535         {
 536                 if (!this->HasUser(user))
 537                 {
 538                         /* Not on channel */
 539                         return this->GetUserCounter();
 540                 }
 541         }
 542
 543         if (servername == NULL || *ServerInstance->Config->HideWhoisServer)
 544                 servername = ServerInstance->Config->ServerName;
 545
 546         if (triggerevents)
 547         {
 548                 FOREACH_MOD(I_OnUserKick,OnUserKick(NULL, user, this, reason, silent));
 549         }
 550
 551         UCListIter i = user->chans.find(this);
 552         if (i != user->chans.end())
 553         {
 554                 if (!silent)
 555                         this->WriteChannelWithServ(servername, "KICK %s %s :%s", this->name, user->nick, reason);
 556
 557                 user->chans.erase(i);
 558                 this->RemoveAllPrefixes(user);
 559         }
 560
 561         if (!this->DelUser(user))
 562         {
 563                 chan_hash::iterator iter = ServerInstance->chanlist->find(this->name);
 564                 /* kill the record */
 565                 if (iter != ServerInstance->chanlist->end())
 566                 {
 567                         int MOD_RESULT = 0;
 568                         FOREACH_RESULT_I(ServerInstance,I_OnChannelPreDelete, OnChannelPreDelete(this));
 569                         if (MOD_RESULT == 1)
 570                                 return 1; // delete halted by module
 571                         FOREACH_MOD(I_OnChannelDelete, OnChannelDelete(this));
 572                         ServerInstance->chanlist->erase(iter);
 573                 }
 574                 return 0;
 575         }
 576
 577         return this->GetUserCounter();
 578 }
 579
 580 long Channel::KickUser(User *src, User *user, const char* reason)
 581 {
 582         bool silent = false;
 583
 584         if (!src || !user || !reason)
 585                 return this->GetUserCounter();
 586
 587         if (IS_LOCAL(src))
 588         {
 589                 if (!this->HasUser(user))
 590                 {
 591                         src->WriteNumeric(441, "%s %s %s :They are not on that channel",src->nick, user->nick, this->name);
 592                         return this->GetUserCounter();
 593                 }
 594                 if ((ServerInstance->ULine(user->server)) && (!ServerInstance->ULine(src->server)))
 595                 {
 596                         src->WriteNumeric(482, "%s %s :Only a u-line may kick a u-line from a channel.",src->nick, this->name);
 597                         return this->GetUserCounter();
 598                 }
 599                 int MOD_RESULT = 0;
 600
 601                 if (!ServerInstance->ULine(src->server))
 602                 {
 603                         MOD_RESULT = 0;
 604                         FOREACH_RESULT(I_OnUserPreKick,OnUserPreKick(src,user,this,reason));
 605                         if (MOD_RESULT == 1)
 606                                 return this->GetUserCounter();
 607                 }
 608                 /* Set to -1 by OnUserPreKick if explicit allow was set */
 609                 if (MOD_RESULT != -1)
 610                 {
 611                         FOREACH_RESULT(I_OnAccessCheck,OnAccessCheck(src,user,this,AC_KICK));
 612                         if ((MOD_RESULT == ACR_DENY) && (!ServerInstance->ULine(src->server)))
 613                                 return this->GetUserCounter();
 614
 615                         if ((MOD_RESULT == ACR_DEFAULT) || (!ServerInstance->ULine(src->server)))
 616                         {
 617                                 int them = this->GetStatus(src);
 618                                 int us = this->GetStatus(user);
 619                                 if ((them < STATUS_HOP) || (them < us))
 620                                 {
 621                                         src->WriteNumeric(482, "%s %s :You must be a channel %soperator",src->nick, this->name, them == STATUS_HOP ? "" : "half-");
 622                                         return this->GetUserCounter();
 623                                 }
 624                         }
 625                 }
 626         }
 627
 628         FOREACH_MOD(I_OnUserKick,OnUserKick(src, user, this, reason, silent));
 629
 630         UCListIter i = user->chans.find(this);
 631         if (i != user->chans.end())
 632         {
 633                 /* zap it from the channel list of the user */
 634                 if (!silent)
 635                         this->WriteChannel(src, "KICK %s %s :%s", this->name, user->nick, reason);
 636
 637                 user->chans.erase(i);
 638                 this->RemoveAllPrefixes(user);
 639         }
 640
 641         if (!this->DelUser(user))
 642         /* if there are no users left on the channel */
 643         {
 644                 chan_hash::iterator iter = ServerInstance->chanlist->find(this->name);
 645
 646                 /* kill the record */
 647                 if (iter != ServerInstance->chanlist->end())
 648                 {
 649                         int MOD_RESULT = 0;
 650                         FOREACH_RESULT_I(ServerInstance,I_OnChannelPreDelete, OnChannelPreDelete(this));
 651                         if (MOD_RESULT == 1)
 652                                 return 1; // delete halted by module
 653                         FOREACH_MOD(I_OnChannelDelete, OnChannelDelete(this));
 654                         ServerInstance->chanlist->erase(iter);
 655                 }
 656                 return 0;
 657         }
 658
 659         return this->GetUserCounter();
 660 }
 661
 662 void Channel::WriteChannel(User* user, const char* text, ...)
 663 {
 664         char textbuffer[MAXBUF];
 665         va_list argsPtr;
 666
 667         if (!user || !text)
 668                 return;
 669
 670         va_start(argsPtr, text);
 671         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 672         va_end(argsPtr);
 673
 674         this->WriteChannel(user, std::string(textbuffer));
 675 }
 676
 677 void Channel::WriteChannel(User* user, const std::string &text)
 678 {
 679         CUList *ulist = this->GetUsers();
 680         char tb[MAXBUF];
 681
 682         if (!user)
 683                 return;
 684
 685         snprintf(tb,MAXBUF,":%s %s",user->GetFullHost(),text.c_str());
 686         std::string out = tb;
 687
 688         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
 689         {
 690                 if (IS_LOCAL(i->first))
 691                         i->first->Write(out);
 692         }
 693 }
 694
 695 void Channel::WriteChannelWithServ(const char* ServName, const char* text, ...)
 696 {
 697         char textbuffer[MAXBUF];
 698         va_list argsPtr;
 699
 700         if (!text)
 701                 return;
 702
 703         va_start(argsPtr, text);
 704         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 705         va_end(argsPtr);
 706
 707         this->WriteChannelWithServ(ServName, std::string(textbuffer));
 708 }
 709
 710 void Channel::WriteChannelWithServ(const char* ServName, const std::string &text)
 711 {
 712         CUList *ulist = this->GetUsers();
 713         char tb[MAXBUF];
 714
 715         snprintf(tb,MAXBUF,":%s %s",ServName ? ServName : ServerInstance->Config->ServerName, text.c_str());
 716         std::string out = tb;
 717
 718         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
 719         {
 720                 if (IS_LOCAL(i->first))
 721                         i->first->Write(out);
 722         }
 723 }
 724
 725 /* write formatted text from a source user to all users on a channel except
 726  * for the sender (for privmsg etc) */
 727 void Channel::WriteAllExceptSender(User* user, bool serversource, char status, const char* text, ...)
 728 {
 729         char textbuffer[MAXBUF];
 730         va_list argsPtr;
 731
 732         if (!text)
 733                 return;
 734
 735         va_start(argsPtr, text);
 736         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 737         va_end(argsPtr);
 738
 739         this->WriteAllExceptSender(user, serversource, status, std::string(textbuffer));
 740 }
 741
 742 void Channel::WriteAllExcept(User* user, bool serversource, char status, CUList &except_list, const char* text, ...)
 743 {
 744         char textbuffer[MAXBUF];
 745         va_list argsPtr;
 746
 747         if (!text)
 748                 return;
 749
 750         va_start(argsPtr, text);
 751         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 752         va_end(argsPtr);
 753
 754         this->WriteAllExcept(user, serversource, status, except_list, std::string(textbuffer));
 755 }
 756
 757 void Channel::WriteAllExcept(User* user, bool serversource, char status, CUList &except_list, const std::string &text)
 758 {
 759         CUList *ulist = this->GetUsers();
 760         char tb[MAXBUF];
 761
 762         snprintf(tb,MAXBUF,":%s %s",user->GetFullHost(),text.c_str());
 763         std::string out = tb;
 764
 765         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
 766         {
 767                 if ((IS_LOCAL(i->first)) && (except_list.find(i->first) == except_list.end()))
 768                 {
 769                         /* User doesnt have the status we're after */
 770                         if (status && !strchr(this->GetAllPrefixChars(i->first), status))
 771                                 continue;
 772
 773                         if (serversource)
 774                                 i->first->WriteServ(text);
 775                         else
 776                                 i->first->Write(out);
 777                 }
 778         }
 779 }
 780
 781 void Channel::WriteAllExceptSender(User* user, bool serversource, char status, const std::string& text)
 782 {
 783         CUList except_list;
 784         except_list[user] = user->nick;
 785         this->WriteAllExcept(user, serversource, status, except_list, std::string(text));
 786 }
 787
 788 /*
 789  * return a count of the users on a specific channel accounting for
 790  * invisible users who won't increase the count. e.g. for /LIST
 791  */
 792 int Channel::CountInvisible()
 793 {
 794         int count = 0;
 795         CUList *ulist= this->GetUsers();
 796         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
 797         {
 798                 if (!(i->first->IsModeSet('i')))
 799                         count++;
 800         }
 801
 802         return count;
 803 }
 804
 805 char* Channel::ChanModes(bool showkey)
 806 {
 807         static char scratch[MAXBUF];
 808         static char sparam[MAXBUF];
 809         char* offset = scratch;
 810         std::string extparam;
 811
 812         *scratch = '\0';
 813         *sparam = '\0';
 814
 815         /* This was still iterating up to 190, Channel::modes is only 64 elements -- Om */
 816         for(int n = 0; n < 64; n++)
 817         {
 818                 if(this->modes[n])
 819                 {
 820                         *offset++ = n + 65;
 821                         extparam.clear();
 822                         switch (n)
 823                         {
 824                                 case CM_KEY:
 825                                         extparam = (showkey ? this->key : "<key>");
 826                                 break;
 827                                 case CM_LIMIT:
 828                                         extparam = ConvToStr(this->limit);
 829                                 break;
 830                                 case CM_NOEXTERNAL:
 831                                 case CM_TOPICLOCK:
 832                                 case CM_INVITEONLY:
 833                                 case CM_MODERATED:
 834                                 case CM_SECRET:
 835                                 case CM_PRIVATE:
 836                                         /* We know these have no parameters */
 837                                 break;
 838                                 default:
 839                                         extparam = this->GetModeParameter(n + 65);
 840                                 break;
 841                         }
 842                         if (!extparam.empty())
 843                         {
 844                                 charlcat(sparam,' ',MAXBUF);
 845                                 strlcat(sparam,extparam.c_str(),MAXBUF);
 846                         }
 847                 }
 848         }
 849
 850         /* Null terminate scratch */
 851         *offset = '\0';
 852         strlcat(scratch,sparam,MAXBUF);
 853         return scratch;
 854 }
 855
 856 /* compile a userlist of a channel into a string, each nick seperated by
 857  * spaces and op, voice etc status shown as @ and +, and send it to 'user'
 858  */
 859 void Channel::UserList(User *user, CUList *ulist)
 860 {
 861         char list[MAXBUF];
 862         size_t dlen, curlen;
 863         int MOD_RESULT = 0;
 864         bool call_modules = true;
 865
 866         if (!IS_LOCAL(user))
 867                 return;
 868
 869         FOREACH_RESULT(I_OnUserList,OnUserList(user, this, ulist));
 870         if (MOD_RESULT == 1)
 871                 call_modules = false;
 872
 873         if (MOD_RESULT != -1)
 874         {
 875                 if ((this->IsModeSet('s')) && (!this->HasUser(user)))
 876                 {
 877                         user->WriteNumeric(401, "%s %s :No such nick/channel",user->nick, this->name);
 878                         return;
 879                 }
 880         }
 881
 882         dlen = curlen = snprintf(list,MAXBUF,"%s %c %s :", user->nick, this->IsModeSet('s') ? '@' : this->IsModeSet('p') ? '*' : '=',  this->name);
 883
 884         int numusers = 0;
 885         char* ptr = list + dlen;
 886
 887         if (!ulist)
 888                 ulist = this->GetUsers();
 889
 890         /* Improvement by Brain - this doesnt change in value, so why was it inside
 891          * the loop?
 892          */
 893         bool has_user = this->HasUser(user);
 894
 895         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
 896         {
 897                 if ((!has_user) && (i->first->IsModeSet('i')))
 898                 {
 899                         /*
 900                          * user is +i, and source not on the channel, does not show
 901                          * nick in NAMES list
 902                          */
 903                         continue;
 904                 }
 905
 906                 if (i->first->Visibility && !i->first->Visibility->VisibleTo(user))
 907                         continue;
 908
 909                 std::string prefixlist = this->GetPrefixChar(i->first);
 910                 std::string nick = i->first->nick;
 911
 912                 if (call_modules)
 913                 {
 914                         FOREACH_MOD(I_OnNamesListItem, OnNamesListItem(user, i->first, this, prefixlist, nick));
 915
 916                         /* Nick was nuked, a module wants us to skip it */
 917                         if (nick.empty())
 918                                 continue;
 919                 }
 920
 921                 size_t ptrlen = 0;
 922
 923                 if (curlen > (480-NICKMAX))
 924                 {
 925                         /* list overflowed into multiple numerics */
 926                         user->WriteServ(std::string(list));
 927
 928                         /* reset our lengths */
 929                         dlen = curlen = snprintf(list,MAXBUF,"%s %c %s :", user->nick, this->IsModeSet('s') ? '@' : this->IsModeSet('p') ? '*' : '=', this->name);
 930                         ptr = list + dlen;
 931
 932                         ptrlen = 0;
 933                         numusers = 0;
 934                 }
 935
 936                 ptrlen = snprintf(ptr, MAXBUF, "%s%s ", prefixlist.c_str(), nick.c_str());
 937
 938                 curlen += ptrlen;
 939                 ptr += ptrlen;
 940
 941                 numusers++;
 942         }
 943
 944         /* if whats left in the list isnt empty, send it */
 945         if (numusers)
 946         {
 947                 user->WriteNumeric(353,std::string(list));
 948         }
 949
 950         user->WriteNumeric(366, "%s %s :End of /NAMES list.", user->nick, this->name);
 951 }
 952
 953 long Channel::GetMaxBans()
 954 {
 955         /* Return the cached value if there is one */
 956         if (this->maxbans)
 957                 return this->maxbans;
 958
 959         /* If there isnt one, we have to do some O(n) hax to find it the first time. (ick) */
 960         for (std::map<std::string,int>::iterator n = ServerInstance->Config->maxbans.begin(); n != ServerInstance->Config->maxbans.end(); n++)
 961         {
 962                 if (match(this->name,n->first.c_str()))
 963                 {
 964                         this->maxbans = n->second;
 965                         return n->second;
 966                 }
 967         }
 968
 969         /* Screw it, just return the default of 64 */
 970         this->maxbans = 64;
 971         return this->maxbans;
 972 }
 973
 974 void Channel::ResetMaxBans()
 975 {
 976         this->maxbans = 0;
 977 }
 978
 979 /* returns the status character for a given user on a channel, e.g. @ for op,
 980  * % for halfop etc. If the user has several modes set, the highest mode
 981  * the user has must be returned.
 982  */
 983 const char* Channel::GetPrefixChar(User *user)
 984 {
 985         static char pf[2] = {0, 0};
 986
 987         prefixlist::iterator n = prefixes.find(user);
 988         if (n != prefixes.end())
 989         {
 990                 if (n->second.size())
 991                 {
 992                         /* If the user has any prefixes, their highest prefix
 993                          * will always be at the head of the list, as the list is
 994                          * sorted in rank order highest first (see SetPrefix()
 995                          * for reasons why)
 996                          */
 997                         *pf = n->second.begin()->first;
 998                         return pf;
 999                 }
1000         }
1001
1002         *pf = 0;
1003         return pf;
1004 }
1005
1006
1007 const char* Channel::GetAllPrefixChars(User* user)
1008 {
1009         static char prefix[MAXBUF];
1010         int ctr = 0;
1011         *prefix = 0;
1012
1013         prefixlist::iterator n = prefixes.find(user);
1014         if (n != prefixes.end())
1015         {
1016                 for (std::vector<prefixtype>::iterator x = n->second.begin(); x != n->second.end(); x++)
1017                 {
1018                         prefix[ctr++] = x->first;
1019                 }
1020         }
1021
1022         prefix[ctr] = 0;
1023
1024         return prefix;
1025 }
1026
1027 unsigned int Channel::GetPrefixValue(User* user)
1028 {
1029         prefixlist::iterator n = prefixes.find(user);
1030         if (n != prefixes.end())
1031         {
1032                 if (n->second.size())
1033                         return n->second.begin()->second;
1034         }
1035         return 0;
1036 }
1037
1038 int Channel::GetStatusFlags(User *user)
1039 {
1040         UCListIter i = user->chans.find(this);
1041         if (i != user->chans.end())
1042         {
1043                 return i->second;
1044         }
1045         return 0;
1046 }
1047
1048 int Channel::GetStatus(User *user)
1049 {
1050         if (ServerInstance->ULine(user->server))
1051                 return STATUS_OP;
1052
1053         UCListIter i = user->chans.find(this);
1054         if (i != user->chans.end())
1055         {
1056                 if ((i->second & UCMODE_OP) > 0)
1057                 {
1058                         return STATUS_OP;
1059                 }
1060                 if ((i->second & UCMODE_HOP) > 0)
1061                 {
1062                         return STATUS_HOP;
1063                 }
1064                 if ((i->second & UCMODE_VOICE) > 0)
1065                 {
1066                         return STATUS_VOICE;
1067                 }
1068                 return STATUS_NORMAL;
1069         }
1070         return STATUS_NORMAL;
1071 }
1072
1073 void Channel::SetPrefix(User* user, char prefix, unsigned int prefix_value, bool adding)
1074 {
1075         prefixlist::iterator n = prefixes.find(user);
1076         prefixtype pfx = std::make_pair(prefix,prefix_value);
1077         if (adding)
1078         {
1079                 if (n != prefixes.end())
1080                 {
1081                         if (std::find(n->second.begin(), n->second.end(), pfx) == n->second.end())
1082                         {
1083                                 n->second.push_back(pfx);
1084                                 /* We must keep prefixes in rank order, largest first.
1085                                  * This is for two reasons, firstly because x-chat *ass-u-me's* this
1086                                  * state, and secondly it turns out to be a benefit to us later.
1087                                  * See above in GetPrefix().
1088                                  */
1089                                 std::sort(n->second.begin(), n->second.end(), ModeParser::PrefixComparison);
1090                         }
1091                 }
1092                 else
1093                 {
1094                         pfxcontainer one;
1095                         one.push_back(pfx);
1096                         prefixes.insert(std::make_pair<User*,pfxcontainer>(user, one));
1097                 }
1098         }
1099         else
1100         {
1101                 if (n != prefixes.end())
1102                 {
1103                         pfxcontainer::iterator x = std::find(n->second.begin(), n->second.end(), pfx);
1104                         if (x != n->second.end())
1105                                 n->second.erase(x);
1106                 }
1107         }
1108 }
1109
1110 void Channel::RemoveAllPrefixes(User* user)
1111 {
1112         prefixlist::iterator n = prefixes.find(user);
1113         if (n != prefixes.end())
1114         {
1115                 prefixes.erase(n);
1116         }
1117 }
1118