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 <cstdarg>
  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         this->name.assign(cname, 0, ServerInstance->Config->Limits.ChanMax);
  29         this->created = ts ? ts : ServerInstance->Time();
  30         this->age = this->created;
  31
  32
  33         maxbans = topicset = limit = 0;
  34         memset(&modes, 0, 64);
  35 }
  36
  37 void Channel::SetMode(char mode,bool mode_on)
  38 {
  39         modes[mode-65] = mode_on;
  40         if (!mode_on)
  41                 this->SetModeParam(mode,"",false);
  42 }
  43
  44
  45 void Channel::SetModeParam(char mode,const char* parameter,bool mode_on)
  46 {
  47         CustomModeList::iterator n = custom_mode_params.find(mode);
  48
  49         if (mode_on)
  50         {
  51                 if (n == custom_mode_params.end())
  52                         custom_mode_params[mode] = strdup(parameter);
  53         }
  54         else
  55         {
  56                 if (n != custom_mode_params.end())
  57                 {
  58                         free(n->second);
  59                         custom_mode_params.erase(n);
  60                 }
  61         }
  62 }
  63
  64 bool Channel::IsModeSet(char mode)
  65 {
  66         return modes[mode-65];
  67 }
  68
  69 std::string Channel::GetModeParameter(char mode)
  70 {
  71         switch (mode)
  72         {
  73                 case 'k':
  74                         return this->key;
  75                 case 'l':
  76                         return ConvToStr(this->limit);
  77                 default:
  78                         CustomModeList::iterator n = custom_mode_params.find(mode);
  79                         if (n != custom_mode_params.end())
  80                                 return n->second;
  81                         return "";
  82                 break;
  83         }
  84 }
  85
  86 long Channel::GetUserCounter()
  87 {
  88         return (this->internal_userlist.size());
  89 }
  90
  91 void Channel::AddUser(User* user)
  92 {
  93         internal_userlist[user] = user->nick;
  94 }
  95
  96 unsigned long Channel::DelUser(User* user)
  97 {
  98         CUListIter a = internal_userlist.find(user);
  99
 100         if (a != internal_userlist.end())
 101         {
 102                 internal_userlist.erase(a);
 103                 /* And tidy any others... */
 104                 DelOppedUser(user);
 105                 DelHalfoppedUser(user);
 106                 DelVoicedUser(user);
 107         }
 108
 109         return internal_userlist.size();
 110 }
 111
 112 bool Channel::HasUser(User* user)
 113 {
 114         return (internal_userlist.find(user) != internal_userlist.end());
 115 }
 116
 117 void Channel::AddOppedUser(User* user)
 118 {
 119         internal_op_userlist[user] = user->nick;
 120 }
 121
 122 void Channel::DelOppedUser(User* user)
 123 {
 124         CUListIter a = internal_op_userlist.find(user);
 125         if (a != internal_op_userlist.end())
 126         {
 127                 internal_op_userlist.erase(a);
 128                 return;
 129         }
 130 }
 131
 132 void Channel::AddHalfoppedUser(User* user)
 133 {
 134         internal_halfop_userlist[user] = user->nick;
 135 }
 136
 137 void Channel::DelHalfoppedUser(User* user)
 138 {
 139         CUListIter a = internal_halfop_userlist.find(user);
 140
 141         if (a != internal_halfop_userlist.end())
 142         {
 143                 internal_halfop_userlist.erase(a);
 144         }
 145 }
 146
 147 void Channel::AddVoicedUser(User* user)
 148 {
 149         internal_voice_userlist[user] = user->nick;
 150 }
 151
 152 void Channel::DelVoicedUser(User* user)
 153 {
 154         CUListIter a = internal_voice_userlist.find(user);
 155
 156         if (a != internal_voice_userlist.end())
 157         {
 158                 internal_voice_userlist.erase(a);
 159         }
 160 }
 161
 162 CUList* Channel::GetUsers()
 163 {
 164         return &internal_userlist;
 165 }
 166
 167 CUList* Channel::GetOppedUsers()
 168 {
 169         return &internal_op_userlist;
 170 }
 171
 172 CUList* Channel::GetHalfoppedUsers()
 173 {
 174         return &internal_halfop_userlist;
 175 }
 176
 177 CUList* Channel::GetVoicedUsers()
 178 {
 179         return &internal_voice_userlist;
 180 }
 181
 182 void Channel::SetDefaultModes()
 183 {
 184         ServerInstance->Logs->Log("CHANNELS", DEBUG, "SetDefaultModes %s", ServerInstance->Config->DefaultModes);
 185         irc::spacesepstream list(ServerInstance->Config->DefaultModes);
 186         std::string modeseq;
 187         std::string parameter;
 188
 189         list.GetToken(modeseq);
 190
 191         for (std::string::iterator n = modeseq.begin(); n != modeseq.end(); ++n)
 192         {
 193                 ModeHandler* mode = ServerInstance->Modes->FindMode(*n, MODETYPE_CHANNEL);
 194                 if (mode)
 195                 {
 196                         if (mode->GetNumParams(true))
 197                                 list.GetToken(parameter);
 198                         else
 199                                 parameter.clear();
 200
 201                         mode->OnModeChange(ServerInstance->FakeClient, ServerInstance->FakeClient, this, parameter, true);
 202                 }
 203         }
 204 }
 205
 206 /*
 207  * add a channel to a user, creating the record for it if needed and linking
 208  * it to the user record
 209  */
 210 Channel* Channel::JoinUser(InspIRCd* Instance, User *user, const char* cn, bool override, const char* key, bool bursting, time_t TS)
 211 {
 212         if (!user || !cn)
 213                 return NULL;
 214
 215         char cname[MAXBUF];
 216         int MOD_RESULT = 0;
 217         std::string privs;
 218         Channel *Ptr;
 219
 220         /*
 221          * We don't restrict the number of channels that remote users or users that are override-joining may be in.
 222          * We restrict local users to MaxChans channels.
 223          * We restrict local operators to OperMaxChans channels.
 224          * This is a lot more logical than how it was formerly. -- w00t
 225          */
 226         if (IS_LOCAL(user) && !override)
 227         {
 228                 if (user->GetMaxChans())
 229                 {
 230                         if (user->chans.size() >= user->GetMaxChans())
 231                         {
 232                                 user->WriteNumeric(ERR_TOOMANYCHANNELS, "%s %s :You are on too many channels",user->nick.c_str(), cn);
 233                                 return NULL;
 234                         }
 235                 }
 236                 else
 237                 {
 238                         if (IS_OPER(user))
 239                         {
 240                                 if (user->chans.size() >= Instance->Config->OperMaxChans)
 241                                 {
 242                                         user->WriteNumeric(ERR_TOOMANYCHANNELS, "%s %s :You are on too many channels",user->nick.c_str(), cn);
 243                                         return NULL;
 244                                 }
 245                         }
 246                         else
 247                         {
 248                                 if (user->chans.size() >= Instance->Config->MaxChans)
 249                                 {
 250                                         user->WriteNumeric(ERR_TOOMANYCHANNELS, "%s %s :You are on too many channels",user->nick.c_str(), cn);
 251                                         return NULL;
 252                                 }
 253                         }
 254                 }
 255         }
 256
 257         strlcpy(cname, cn, Instance->Config->Limits.ChanMax);
 258         Ptr = Instance->FindChan(cname);
 259
 260         if (!Ptr)
 261         {
 262                 /*
 263                  * Fix: desync bug was here, don't set @ on remote users - spanningtree handles their permissions. bug #358. -- w00t
 264                  */
 265                 if (!IS_LOCAL(user))
 266                 {
 267                         if (!TS)
 268                                 Instance->Logs->Log("CHANNEL",DEBUG,"*** BUG *** Channel::JoinUser called for REMOTE user '%s' on channel '%s' but no TS given!", user->nick.c_str(), cn);
 269                 }
 270                 else
 271                 {
 272                         privs = "@";
 273                 }
 274
 275                 if (IS_LOCAL(user) && override == false)
 276                 {
 277                         MOD_RESULT = 0;
 278                         FOREACH_RESULT_I(Instance,I_OnUserPreJoin, OnUserPreJoin(user, NULL, cname, privs, key ? key : ""));
 279                         if (MOD_RESULT == 1)
 280                                 return NULL;
 281                 }
 282
 283                 Ptr = new Channel(Instance, cname, TS);
 284         }
 285         else
 286         {
 287                 /* Already on the channel */
 288                 if (Ptr->HasUser(user))
 289                         return NULL;
 290
 291                 /*
 292                  * remote users are allowed us to bypass channel modes
 293                  * and bans (used by servers)
 294                  */
 295                 if (IS_LOCAL(user) && override == false)
 296                 {
 297                         MOD_RESULT = 0;
 298                         FOREACH_RESULT_I(Instance,I_OnUserPreJoin, OnUserPreJoin(user, Ptr, cname, privs, key ? key : ""));
 299                         if (MOD_RESULT == 1)
 300                         {
 301                                 return NULL;
 302                         }
 303                         else if (MOD_RESULT == 0)
 304                         {
 305                                 if (!Ptr->key.empty())
 306                                 {
 307                                         MOD_RESULT = 0;
 308                                         FOREACH_RESULT_I(Instance,I_OnCheckKey,OnCheckKey(user, Ptr, key ? key : ""));
 309                                         if (!MOD_RESULT)
 310                                         {
 311                                                 if ((!key) || Ptr->key == key)
 312                                                 {
 313                                                         user->WriteNumeric(ERR_BADCHANNELKEY, "%s %s :Cannot join channel (Incorrect channel key)",user->nick.c_str(), Ptr->name.c_str());
 314                                                         return NULL;
 315                                                 }
 316                                         }
 317                                 }
 318                                 if (Ptr->IsModeSet('i'))
 319                                 {
 320                                         MOD_RESULT = 0;
 321                                         FOREACH_RESULT_I(Instance,I_OnCheckInvite,OnCheckInvite(user, Ptr));
 322                                         if (!MOD_RESULT)
 323                                         {
 324                                                 if (!user->IsInvited(Ptr->name.c_str()))
 325                                                 {
 326                                                         user->WriteNumeric(ERR_INVITEONLYCHAN, "%s %s :Cannot join channel (Invite only)",user->nick.c_str(), Ptr->name.c_str());
 327                                                         return NULL;
 328                                                 }
 329                                         }
 330                                         user->RemoveInvite(Ptr->name.c_str());
 331                                 }
 332                                 if (Ptr->limit)
 333                                 {
 334                                         MOD_RESULT = 0;
 335                                         FOREACH_RESULT_I(Instance,I_OnCheckLimit,OnCheckLimit(user, Ptr));
 336                                         if (!MOD_RESULT)
 337                                         {
 338                                                 if (Ptr->GetUserCounter() >= Ptr->limit)
 339                                                 {
 340                                                         user->WriteNumeric(ERR_CHANNELISFULL, "%s %s :Cannot join channel (Channel is full)",user->nick.c_str(), Ptr->name.c_str());
 341                                                         return NULL;
 342                                                 }
 343                                         }
 344                                 }
 345                                 if (Ptr->bans.size())
 346                                 {
 347                                         if (Ptr->IsBanned(user))
 348                                         {
 349                                                 user->WriteNumeric(ERR_BANNEDFROMCHAN, "%s %s :Cannot join channel (You're banned)",user->nick.c_str(), Ptr->name.c_str());
 350                                                 return NULL;
 351                                         }
 352                                 }
 353                         }
 354                 }
 355         }
 356
 357         /* As spotted by jilles, dont bother to set this on remote users */
 358         if (IS_LOCAL(user) && Ptr->GetUserCounter() == 0)
 359                 Ptr->SetDefaultModes();
 360
 361         return Channel::ForceChan(Instance, Ptr, user, privs, bursting);
 362 }
 363
 364 Channel* Channel::ForceChan(InspIRCd* Instance, Channel* Ptr, User* user, const std::string &privs, bool bursting)
 365 {
 366         std::string nick = user->nick;
 367         bool silent = false;
 368
 369         Ptr->AddUser(user);
 370
 371         /* Just in case they have no permissions */
 372         user->chans[Ptr] = 0;
 373
 374         for (std::string::const_iterator x = privs.begin(); x != privs.end(); x++)
 375         {
 376                 const char status = *x;
 377                 ModeHandler* mh = Instance->Modes->FindPrefix(status);
 378                 if (mh)
 379                 {
 380                         /* Set, and make sure that the mode handler knows this mode was now set */
 381                         Ptr->SetPrefix(user, status, mh->GetPrefixRank(), true);
 382                         mh->OnModeChange(Instance->FakeClient, Instance->FakeClient, Ptr, nick, true);
 383
 384                         switch (mh->GetPrefix())
 385                         {
 386                                 /* These logic ops are SAFE IN THIS CASE because if the entry doesnt exist,
 387                                  * addressing operator[] creates it. If they do exist, it points to it.
 388                                  * At all other times where we dont want to create an item if it doesnt exist, we
 389                                  * must stick to ::find().
 390                                  */
 391                                 case '@':
 392                                         user->chans[Ptr] |= UCMODE_OP;
 393                                 break;
 394                                 case '%':
 395                                         user->chans[Ptr] |= UCMODE_HOP;
 396                                 break;
 397                                 case '+':
 398                                         user->chans[Ptr] |= UCMODE_VOICE;
 399                                 break;
 400                         }
 401                 }
 402         }
 403
 404         FOREACH_MOD_I(Instance,I_OnUserJoin,OnUserJoin(user, Ptr, bursting, silent));
 405
 406         if (!silent)
 407                 Ptr->WriteChannel(user,"JOIN :%s",Ptr->name.c_str());
 408
 409         /* Theyre not the first ones in here, make sure everyone else sees the modes we gave the user */
 410         std::string ms = Instance->Modes->ModeString(user, Ptr);
 411         if ((Ptr->GetUserCounter() > 1) && (ms.length()))
 412                 Ptr->WriteAllExceptSender(user, true, 0, "MODE %s +%s", Ptr->name.c_str(), ms.c_str());
 413
 414         /* Major improvement by Brain - we dont need to be calculating all this pointlessly for remote users */
 415         if (IS_LOCAL(user))
 416         {
 417                 if (Ptr->topicset)
 418                 {
 419                         user->WriteNumeric(RPL_TOPIC, "%s %s :%s", user->nick.c_str(), Ptr->name.c_str(), Ptr->topic.c_str());
 420                         user->WriteNumeric(RPL_TOPICTIME, "%s %s %s %lu", user->nick.c_str(), Ptr->name.c_str(), Ptr->setby.c_str(), (unsigned long)Ptr->topicset);
 421                 }
 422                 Ptr->UserList(user);
 423         }
 424         FOREACH_MOD_I(Instance,I_OnPostJoin,OnPostJoin(user, Ptr));
 425         return Ptr;
 426 }
 427
 428 bool Channel::IsBanned(User* user)
 429 {
 430         char mask[MAXBUF];
 431         int MOD_RESULT = 0;
 432         FOREACH_RESULT(I_OnCheckBan,OnCheckBan(user, this));
 433
 434         if (MOD_RESULT == -1)
 435                 return true;
 436         else if (MOD_RESULT == 0)
 437         {
 438                 snprintf(mask, MAXBUF, "%s!%s@%s", user->nick.c_str(), user->ident.c_str(), 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(const std::string &str, char type)
 455 {
 456         int MOD_RESULT = 0;
 457         FOREACH_RESULT(I_OnCheckStringExtBan, OnCheckStringExtBan(str, this, type));
 458
 459         if (MOD_RESULT == -1)
 460                 return true;
 461         else if (MOD_RESULT == 0)
 462         {
 463                 for (BanList::iterator i = this->bans.begin(); i != this->bans.end(); i++)
 464                 {
 465                         if (i->data[0] != type || i->data[1] != ':')
 466                                 continue;
 467
 468                         // Iterate past char and : to get to the mask without doing a data copy(!)
 469                         std::string maskptr = i->data.substr(2);
 470                         ServerInstance->Logs->Log("EXTBANS", DEBUG, "Checking %s against %s, type is %c", str.c_str(), maskptr.c_str(), type);
 471
 472                         if (match(str, maskptr))
 473                                 return true;
 474                 }
 475         }
 476
 477         return false;
 478 }
 479
 480 bool Channel::IsExtBanned(User *user, char type)
 481 {
 482         int MOD_RESULT = 0;
 483         FOREACH_RESULT(I_OnCheckExtBan, OnCheckExtBan(user, this, type));
 484
 485         if (MOD_RESULT == -1)
 486                 return true;
 487         else if (MOD_RESULT == 0)
 488         {
 489                 char mask[MAXBUF];
 490                 snprintf(mask, MAXBUF, "%s!%s@%s", user->nick.c_str(), user->ident.c_str(), user->GetIPString());
 491
 492                 // XXX: we should probably hook cloaked hosts in here somehow too..
 493                 if (this->IsExtBanned(mask, type))
 494                         return true;
 495
 496                 if (this->IsExtBanned(user->GetFullHost(), type))
 497                         return true;
 498
 499                 if (this->IsExtBanned(user->GetFullRealHost(), type))
 500                         return true;
 501         }
 502
 503         return false;
 504 }
 505
 506 /* Channel::PartUser
 507  * remove a channel from a users record, and return the number of users left.
 508  * Therefore, if this function returns 0 the caller should delete the Channel.
 509  *
 510  * XXX: bleh, string copy of reason, fixme! -- w00t
 511  */
 512 long Channel::PartUser(User *user, std::string &reason)
 513 {
 514         bool silent = false;
 515
 516         if (!user)
 517                 return this->GetUserCounter();
 518
 519         UCListIter i = user->chans.find(this);
 520         if (i != user->chans.end())
 521         {
 522                 FOREACH_MOD(I_OnUserPart,OnUserPart(user, this, reason, silent));
 523
 524                 if (!silent)
 525                         this->WriteChannel(user, "PART %s%s%s", this->name.c_str(), reason.empty() ? "" : ":", reason.c_str());
 526
 527                 user->chans.erase(i);
 528                 this->RemoveAllPrefixes(user);
 529         }
 530
 531         if (!this->DelUser(user)) /* if there are no users left on the channel... */
 532         {
 533                 chan_hash::iterator iter = ServerInstance->chanlist->find(this->name);
 534                 /* kill the record */
 535                 if (iter != ServerInstance->chanlist->end())
 536                 {
 537                         int MOD_RESULT = 0;
 538                         FOREACH_RESULT_I(ServerInstance,I_OnChannelPreDelete, OnChannelPreDelete(this));
 539                         if (MOD_RESULT == 1)
 540                                 return 1; // delete halted by module
 541                         FOREACH_MOD(I_OnChannelDelete, OnChannelDelete(this));
 542                         ServerInstance->chanlist->erase(iter);
 543                 }
 544                 return 0;
 545         }
 546
 547         return this->GetUserCounter();
 548 }
 549
 550 long Channel::ServerKickUser(User* user, const char* reason, bool triggerevents, const char* servername)
 551 {
 552         bool silent = false;
 553
 554         if (!user || !reason)
 555                 return this->GetUserCounter();
 556
 557         if (IS_LOCAL(user))
 558         {
 559                 if (!this->HasUser(user))
 560                 {
 561                         /* Not on channel */
 562                         return this->GetUserCounter();
 563                 }
 564         }
 565
 566         if (servername == NULL || *ServerInstance->Config->HideWhoisServer)
 567                 servername = ServerInstance->Config->ServerName;
 568
 569         if (triggerevents)
 570         {
 571                 FOREACH_MOD(I_OnUserKick,OnUserKick(NULL, user, this, reason, silent));
 572         }
 573
 574         UCListIter i = user->chans.find(this);
 575         if (i != user->chans.end())
 576         {
 577                 if (!silent)
 578                         this->WriteChannelWithServ(servername, "KICK %s %s :%s", this->name.c_str(), user->nick.c_str(), reason);
 579
 580                 user->chans.erase(i);
 581                 this->RemoveAllPrefixes(user);
 582         }
 583
 584         if (!this->DelUser(user))
 585         {
 586                 chan_hash::iterator iter = ServerInstance->chanlist->find(this->name);
 587                 /* kill the record */
 588                 if (iter != ServerInstance->chanlist->end())
 589                 {
 590                         int MOD_RESULT = 0;
 591                         FOREACH_RESULT_I(ServerInstance,I_OnChannelPreDelete, OnChannelPreDelete(this));
 592                         if (MOD_RESULT == 1)
 593                                 return 1; // delete halted by module
 594                         FOREACH_MOD(I_OnChannelDelete, OnChannelDelete(this));
 595                         ServerInstance->chanlist->erase(iter);
 596                 }
 597                 return 0;
 598         }
 599
 600         return this->GetUserCounter();
 601 }
 602
 603 long Channel::KickUser(User *src, User *user, const char* reason)
 604 {
 605         bool silent = false;
 606
 607         if (!src || !user || !reason)
 608                 return this->GetUserCounter();
 609
 610         if (IS_LOCAL(src))
 611         {
 612                 if (!this->HasUser(user))
 613                 {
 614                         src->WriteNumeric(ERR_USERNOTINCHANNEL, "%s %s %s :They are not on that channel",src->nick.c_str(), user->nick.c_str(), this->name.c_str());
 615                         return this->GetUserCounter();
 616                 }
 617                 if ((ServerInstance->ULine(user->server)) && (!ServerInstance->ULine(src->server)))
 618                 {
 619                         src->WriteNumeric(ERR_CHANOPRIVSNEEDED, "%s %s :Only a u-line may kick a u-line from a channel.",src->nick.c_str(), this->name.c_str());
 620                         return this->GetUserCounter();
 621                 }
 622                 int MOD_RESULT = 0;
 623
 624                 if (!ServerInstance->ULine(src->server))
 625                 {
 626                         MOD_RESULT = 0;
 627                         FOREACH_RESULT(I_OnUserPreKick,OnUserPreKick(src,user,this,reason));
 628                         if (MOD_RESULT == 1)
 629                                 return this->GetUserCounter();
 630                 }
 631                 /* Set to -1 by OnUserPreKick if explicit allow was set */
 632                 if (MOD_RESULT != -1)
 633                 {
 634                         FOREACH_RESULT(I_OnAccessCheck,OnAccessCheck(src,user,this,AC_KICK));
 635                         if ((MOD_RESULT == ACR_DENY) && (!ServerInstance->ULine(src->server)))
 636                                 return this->GetUserCounter();
 637
 638                         if ((MOD_RESULT == ACR_DEFAULT) || (!ServerInstance->ULine(src->server)))
 639                         {
 640                                 int them = this->GetStatus(src);
 641                                 int us = this->GetStatus(user);
 642                                 if ((them < STATUS_HOP) || (them < us))
 643                                 {
 644                                         src->WriteNumeric(ERR_CHANOPRIVSNEEDED, "%s %s :You must be a channel %soperator",src->nick.c_str(), this->name.c_str(), them == STATUS_HOP ? "" : "half-");
 645                                         return this->GetUserCounter();
 646                                 }
 647                         }
 648                 }
 649         }
 650
 651         FOREACH_MOD(I_OnUserKick,OnUserKick(src, user, this, reason, silent));
 652
 653         UCListIter i = user->chans.find(this);
 654         if (i != user->chans.end())
 655         {
 656                 /* zap it from the channel list of the user */
 657                 if (!silent)
 658                         this->WriteChannel(src, "KICK %s %s :%s", this->name.c_str(), user->nick.c_str(), reason);
 659
 660                 user->chans.erase(i);
 661                 this->RemoveAllPrefixes(user);
 662         }
 663
 664         if (!this->DelUser(user))
 665         /* if there are no users left on the channel */
 666         {
 667                 chan_hash::iterator iter = ServerInstance->chanlist->find(this->name.c_str());
 668
 669                 /* kill the record */
 670                 if (iter != ServerInstance->chanlist->end())
 671                 {
 672                         int MOD_RESULT = 0;
 673                         FOREACH_RESULT_I(ServerInstance,I_OnChannelPreDelete, OnChannelPreDelete(this));
 674                         if (MOD_RESULT == 1)
 675                                 return 1; // delete halted by module
 676                         FOREACH_MOD(I_OnChannelDelete, OnChannelDelete(this));
 677                         ServerInstance->chanlist->erase(iter);
 678                 }
 679                 return 0;
 680         }
 681
 682         return this->GetUserCounter();
 683 }
 684
 685 void Channel::WriteChannel(User* user, const char* text, ...)
 686 {
 687         char textbuffer[MAXBUF];
 688         va_list argsPtr;
 689
 690         if (!user || !text)
 691                 return;
 692
 693         va_start(argsPtr, text);
 694         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 695         va_end(argsPtr);
 696
 697         this->WriteChannel(user, std::string(textbuffer));
 698 }
 699
 700 void Channel::WriteChannel(User* user, const std::string &text)
 701 {
 702         CUList *ulist = this->GetUsers();
 703         char tb[MAXBUF];
 704
 705         if (!user)
 706                 return;
 707
 708         snprintf(tb,MAXBUF,":%s %s", user->GetFullHost().c_str(), text.c_str());
 709         std::string out = tb;
 710
 711         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
 712         {
 713                 if (IS_LOCAL(i->first))
 714                         i->first->Write(out);
 715         }
 716 }
 717
 718 void Channel::WriteChannelWithServ(const char* ServName, const char* text, ...)
 719 {
 720         char textbuffer[MAXBUF];
 721         va_list argsPtr;
 722
 723         if (!text)
 724                 return;
 725
 726         va_start(argsPtr, text);
 727         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 728         va_end(argsPtr);
 729
 730         this->WriteChannelWithServ(ServName, std::string(textbuffer));
 731 }
 732
 733 void Channel::WriteChannelWithServ(const char* ServName, const std::string &text)
 734 {
 735         CUList *ulist = this->GetUsers();
 736         char tb[MAXBUF];
 737
 738         snprintf(tb,MAXBUF,":%s %s", ServName ? ServName : ServerInstance->Config->ServerName, text.c_str());
 739         std::string out = tb;
 740
 741         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
 742         {
 743                 if (IS_LOCAL(i->first))
 744                         i->first->Write(out);
 745         }
 746 }
 747
 748 /* write formatted text from a source user to all users on a channel except
 749  * for the sender (for privmsg etc) */
 750 void Channel::WriteAllExceptSender(User* user, bool serversource, char status, const char* text, ...)
 751 {
 752         char textbuffer[MAXBUF];
 753         va_list argsPtr;
 754
 755         if (!text)
 756                 return;
 757
 758         va_start(argsPtr, text);
 759         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 760         va_end(argsPtr);
 761
 762         this->WriteAllExceptSender(user, serversource, status, std::string(textbuffer));
 763 }
 764
 765 void Channel::WriteAllExcept(User* user, bool serversource, char status, CUList &except_list, const char* text, ...)
 766 {
 767         char textbuffer[MAXBUF];
 768         va_list argsPtr;
 769
 770         if (!text)
 771                 return;
 772
 773         va_start(argsPtr, text);
 774         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 775         va_end(argsPtr);
 776
 777         this->WriteAllExcept(user, serversource, status, except_list, std::string(textbuffer));
 778 }
 779
 780 void Channel::WriteAllExcept(User* user, bool serversource, char status, CUList &except_list, const std::string &text)
 781 {
 782         CUList *ulist = this->GetUsers();
 783         char tb[MAXBUF];
 784
 785         snprintf(tb,MAXBUF,":%s %s", user->GetFullHost().c_str(), text.c_str());
 786         std::string out = tb;
 787
 788         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
 789         {
 790                 if ((IS_LOCAL(i->first)) && (except_list.find(i->first) == except_list.end()))
 791                 {
 792                         /* User doesnt have the status we're after */
 793                         if (status && !strchr(this->GetAllPrefixChars(i->first), status))
 794                                 continue;
 795
 796                         if (serversource)
 797                                 i->first->WriteServ(text);
 798                         else
 799                                 i->first->Write(out);
 800                 }
 801         }
 802 }
 803
 804 void Channel::WriteAllExceptSender(User* user, bool serversource, char status, const std::string& text)
 805 {
 806         CUList except_list;
 807         except_list[user] = user->nick;
 808         this->WriteAllExcept(user, serversource, status, except_list, std::string(text));
 809 }
 810
 811 /*
 812  * return a count of the users on a specific channel accounting for
 813  * invisible users who won't increase the count. e.g. for /LIST
 814  */
 815 int Channel::CountInvisible()
 816 {
 817         int count = 0;
 818         CUList *ulist= this->GetUsers();
 819         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
 820         {
 821                 if (!(i->first->IsModeSet('i')))
 822                         count++;
 823         }
 824
 825         return count;
 826 }
 827
 828 char* Channel::ChanModes(bool showkey)
 829 {
 830         static char scratch[MAXBUF];
 831         static char sparam[MAXBUF];
 832         char* offset = scratch;
 833         std::string extparam;
 834
 835         *scratch = '\0';
 836         *sparam = '\0';
 837
 838         /* This was still iterating up to 190, Channel::modes is only 64 elements -- Om */
 839         for(int n = 0; n < 64; n++)
 840         {
 841                 if(this->modes[n])
 842                 {
 843                         *offset++ = n + 65;
 844                         extparam.clear();
 845                         switch (n)
 846                         {
 847                                 case CM_KEY:
 848                                         extparam = (showkey ? this->key : "<key>");
 849                                 break;
 850                                 case CM_LIMIT:
 851                                         extparam = ConvToStr(this->limit);
 852                                 break;
 853                                 case CM_NOEXTERNAL:
 854                                 case CM_TOPICLOCK:
 855                                 case CM_INVITEONLY:
 856                                 case CM_MODERATED:
 857                                 case CM_SECRET:
 858                                 case CM_PRIVATE:
 859                                         /* We know these have no parameters */
 860                                 break;
 861                                 default:
 862                                         extparam = this->GetModeParameter(n + 65);
 863                                 break;
 864                         }
 865                         if (!extparam.empty())
 866                         {
 867                                 charlcat(sparam,' ',MAXBUF);
 868                                 strlcat(sparam,extparam.c_str(),MAXBUF);
 869                         }
 870                 }
 871         }
 872
 873         /* Null terminate scratch */
 874         *offset = '\0';
 875         strlcat(scratch,sparam,MAXBUF);
 876         return scratch;
 877 }
 878
 879 /* compile a userlist of a channel into a string, each nick seperated by
 880  * spaces and op, voice etc status shown as @ and +, and send it to 'user'
 881  */
 882 void Channel::UserList(User *user, CUList *ulist)
 883 {
 884         char list[MAXBUF];
 885         size_t dlen, curlen;
 886         int MOD_RESULT = 0;
 887         bool call_modules = true;
 888
 889         if (!IS_LOCAL(user))
 890                 return;
 891
 892         FOREACH_RESULT(I_OnUserList,OnUserList(user, this, ulist));
 893         if (MOD_RESULT == 1)
 894                 call_modules = false;
 895
 896         if (MOD_RESULT != -1)
 897         {
 898                 if ((this->IsModeSet('s')) && (!this->HasUser(user)))
 899                 {
 900                         user->WriteNumeric(ERR_NOSUCHNICK, "%s %s :No such nick/channel",user->nick.c_str(), this->name.c_str());
 901                         return;
 902                 }
 903         }
 904
 905         dlen = curlen = snprintf(list,MAXBUF,"%s %c %s :", user->nick.c_str(), this->IsModeSet('s') ? '@' : this->IsModeSet('p') ? '*' : '=',  this->name.c_str());
 906
 907         int numusers = 0;
 908         char* ptr = list + dlen;
 909
 910         if (!ulist)
 911                 ulist = this->GetUsers();
 912
 913         /* Improvement by Brain - this doesnt change in value, so why was it inside
 914          * the loop?
 915          */
 916         bool has_user = this->HasUser(user);
 917
 918         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
 919         {
 920                 if ((!has_user) && (i->first->IsModeSet('i')))
 921                 {
 922                         /*
 923                          * user is +i, and source not on the channel, does not show
 924                          * nick in NAMES list
 925                          */
 926                         continue;
 927                 }
 928
 929                 if (i->first->Visibility && !i->first->Visibility->VisibleTo(user))
 930                         continue;
 931
 932                 std::string prefixlist = this->GetPrefixChar(i->first);
 933                 std::string nick = i->first->nick;
 934
 935                 if (call_modules)
 936                 {
 937                         FOREACH_MOD(I_OnNamesListItem, OnNamesListItem(user, i->first, this, prefixlist, nick));
 938
 939                         /* Nick was nuked, a module wants us to skip it */
 940                         if (nick.empty())
 941                                 continue;
 942                 }
 943
 944                 size_t ptrlen = 0;
 945
 946                 if (curlen + prefixlist.length() + nick.length() + 1 > 480)
 947                 {
 948                         /* list overflowed into multiple numerics */
 949                         user->WriteServ(std::string(list));
 950
 951                         /* reset our lengths */
 952                         dlen = curlen = snprintf(list,MAXBUF,"%s %c %s :", user->nick.c_str(), this->IsModeSet('s') ? '@' : this->IsModeSet('p') ? '*' : '=', this->name.c_str());
 953                         ptr = list + dlen;
 954
 955                         ptrlen = 0;
 956                         numusers = 0;
 957                 }
 958
 959                 ptrlen = snprintf(ptr, MAXBUF, "%s%s ", prefixlist.c_str(), nick.c_str());
 960
 961                 curlen += ptrlen;
 962                 ptr += ptrlen;
 963
 964                 numusers++;
 965         }
 966
 967         /* if whats left in the list isnt empty, send it */
 968         if (numusers)
 969         {
 970                 user->WriteNumeric(RPL_NAMREPLY, std::string(list));
 971         }
 972
 973         user->WriteNumeric(RPL_ENDOFNAMES, "%s %s :End of /NAMES list.", user->nick.c_str(), this->name.c_str());
 974 }
 975
 976 long Channel::GetMaxBans()
 977 {
 978         /* Return the cached value if there is one */
 979         if (this->maxbans)
 980                 return this->maxbans;
 981
 982         /* If there isnt one, we have to do some O(n) hax to find it the first time. (ick) */
 983         for (std::map<std::string,int>::iterator n = ServerInstance->Config->maxbans.begin(); n != ServerInstance->Config->maxbans.end(); n++)
 984         {
 985                 if (match(this->name,n->first))
 986                 {
 987                         this->maxbans = n->second;
 988                         return n->second;
 989                 }
 990         }
 991
 992         /* Screw it, just return the default of 64 */
 993         this->maxbans = 64;
 994         return this->maxbans;
 995 }
 996
 997 void Channel::ResetMaxBans()
 998 {
 999         this->maxbans = 0;
1000 }
1001
1002 /* returns the status character for a given user on a channel, e.g. @ for op,
1003  * % for halfop etc. If the user has several modes set, the highest mode
1004  * the user has must be returned.
1005  */
1006 const char* Channel::GetPrefixChar(User *user)
1007 {
1008         static char pf[2] = {0, 0};
1009
1010         prefixlist::iterator n = prefixes.find(user);
1011         if (n != prefixes.end())
1012         {
1013                 if (n->second.size())
1014                 {
1015                         /* If the user has any prefixes, their highest prefix
1016                          * will always be at the head of the list, as the list is
1017                          * sorted in rank order highest first (see SetPrefix()
1018                          * for reasons why)
1019                          */
1020                         *pf = n->second.begin()->first;
1021                         return pf;
1022                 }
1023         }
1024
1025         *pf = 0;
1026         return pf;
1027 }
1028
1029
1030 const char* Channel::GetAllPrefixChars(User* user)
1031 {
1032         static char prefix[MAXBUF];
1033         int ctr = 0;
1034         *prefix = 0;
1035
1036         prefixlist::iterator n = prefixes.find(user);
1037         if (n != prefixes.end())
1038         {
1039                 for (std::vector<prefixtype>::iterator x = n->second.begin(); x != n->second.end(); x++)
1040                 {
1041                         prefix[ctr++] = x->first;
1042                 }
1043         }
1044
1045         prefix[ctr] = 0;
1046
1047         return prefix;
1048 }
1049
1050 unsigned int Channel::GetPrefixValue(User* user)
1051 {
1052         prefixlist::iterator n = prefixes.find(user);
1053         if (n != prefixes.end())
1054         {
1055                 if (n->second.size())
1056                         return n->second.begin()->second;
1057         }
1058         return 0;
1059 }
1060
1061 int Channel::GetStatusFlags(User *user)
1062 {
1063         UCListIter i = user->chans.find(this);
1064         if (i != user->chans.end())
1065         {
1066                 return i->second;
1067         }
1068         return 0;
1069 }
1070
1071 int Channel::GetStatus(User *user)
1072 {
1073         if (ServerInstance->ULine(user->server))
1074                 return STATUS_OP;
1075
1076         UCListIter i = user->chans.find(this);
1077         if (i != user->chans.end())
1078         {
1079                 if ((i->second & UCMODE_OP) > 0)
1080                 {
1081                         return STATUS_OP;
1082                 }
1083                 if ((i->second & UCMODE_HOP) > 0)
1084                 {
1085                         return STATUS_HOP;
1086                 }
1087                 if ((i->second & UCMODE_VOICE) > 0)
1088                 {
1089                         return STATUS_VOICE;
1090                 }
1091                 return STATUS_NORMAL;
1092         }
1093         return STATUS_NORMAL;
1094 }
1095
1096 void Channel::SetPrefix(User* user, char prefix, unsigned int prefix_value, bool adding)
1097 {
1098         prefixlist::iterator n = prefixes.find(user);
1099         prefixtype pfx = std::make_pair(prefix,prefix_value);
1100         if (adding)
1101         {
1102                 if (n != prefixes.end())
1103                 {
1104                         if (std::find(n->second.begin(), n->second.end(), pfx) == n->second.end())
1105                         {
1106                                 n->second.push_back(pfx);
1107                                 /* We must keep prefixes in rank order, largest first.
1108                                  * This is for two reasons, firstly because x-chat *ass-u-me's* this
1109                                  * state, and secondly it turns out to be a benefit to us later.
1110                                  * See above in GetPrefix().
1111                                  */
1112                                 std::sort(n->second.begin(), n->second.end(), ModeParser::PrefixComparison);
1113                         }
1114                 }
1115                 else
1116                 {
1117                         pfxcontainer one;
1118                         one.push_back(pfx);
1119                         prefixes.insert(std::make_pair<User*,pfxcontainer>(user, one));
1120                 }
1121         }
1122         else
1123         {
1124                 if (n != prefixes.end())
1125                 {
1126                         pfxcontainer::iterator x = std::find(n->second.begin(), n->second.end(), pfx);
1127                         if (x != n->second.end())
1128                                 n->second.erase(x);
1129                 }
1130         }
1131 }
1132
1133 void Channel::RemoveAllPrefixes(User* user)
1134 {
1135         prefixlist::iterator n = prefixes.find(user);
1136         if (n != prefixes.end())
1137         {
1138                 prefixes.erase(n);
1139         }
1140 }
1141