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(405, "%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(405, "%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(405, "%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(475, "%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(473, "%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(471, "%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(474, "%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(332, "%s %s :%s", user->nick.c_str(), Ptr->name.c_str(), Ptr->topic.c_str());
 420                         user->WriteNumeric(333, "%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(User *user, char type)
 455 {
 456         // XXX. do we need events?
 457         char mask[MAXBUF];
 458
 459         snprintf(mask, MAXBUF, "%s!%s@%s", user->nick.c_str(), user->ident.c_str(), user->GetIPString());
 460
 461         for (BanList::iterator i = this->bans.begin(); i != this->bans.end(); i++)
 462         {
 463                 if (i->data[0] != type || i->data[1] != ':')
 464                         continue;
 465
 466                 // Iterate past char and : to get to the mask without doing a data copy(!)
 467                 std::string maskptr = i->data.substr(2);
 468
 469                 /* This allows CIDR ban matching
 470                  *
 471                  *        Full masked host                             Full unmasked host                     IP with/without CIDR
 472                  */
 473                 if ((match(user->GetFullHost(), maskptr)) || (match(user->GetFullRealHost(), maskptr)) || (match(mask, maskptr, true)))
 474                 {
 475                         return true;
 476                 }
 477         }
 478
 479         return false;
 480 }
 481
 482 /* Channel::PartUser
 483  * remove a channel from a users record, and return the number of users left.
 484  * Therefore, if this function returns 0 the caller should delete the Channel.
 485  *
 486  * XXX: bleh, string copy of reason, fixme! -- w00t
 487  */
 488 long Channel::PartUser(User *user, std::string &reason)
 489 {
 490         bool silent = false;
 491
 492         if (!user)
 493                 return this->GetUserCounter();
 494
 495         UCListIter i = user->chans.find(this);
 496         if (i != user->chans.end())
 497         {
 498                 FOREACH_MOD(I_OnUserPart,OnUserPart(user, this, reason, silent));
 499
 500                 if (!silent)
 501                         this->WriteChannel(user, "PART %s%s%s", this->name.c_str(), reason.empty() ? "" : ":", reason.c_str());
 502
 503                 user->chans.erase(i);
 504                 this->RemoveAllPrefixes(user);
 505         }
 506
 507         if (!this->DelUser(user)) /* if there are no users left on the channel... */
 508         {
 509                 chan_hash::iterator iter = ServerInstance->chanlist->find(this->name);
 510                 /* kill the record */
 511                 if (iter != ServerInstance->chanlist->end())
 512                 {
 513                         int MOD_RESULT = 0;
 514                         FOREACH_RESULT_I(ServerInstance,I_OnChannelPreDelete, OnChannelPreDelete(this));
 515                         if (MOD_RESULT == 1)
 516                                 return 1; // delete halted by module
 517                         FOREACH_MOD(I_OnChannelDelete, OnChannelDelete(this));
 518                         ServerInstance->chanlist->erase(iter);
 519                 }
 520                 return 0;
 521         }
 522
 523         return this->GetUserCounter();
 524 }
 525
 526 long Channel::ServerKickUser(User* user, const char* reason, bool triggerevents, const char* servername)
 527 {
 528         bool silent = false;
 529
 530         if (!user || !reason)
 531                 return this->GetUserCounter();
 532
 533         if (IS_LOCAL(user))
 534         {
 535                 if (!this->HasUser(user))
 536                 {
 537                         /* Not on channel */
 538                         return this->GetUserCounter();
 539                 }
 540         }
 541
 542         if (servername == NULL || *ServerInstance->Config->HideWhoisServer)
 543                 servername = ServerInstance->Config->ServerName;
 544
 545         if (triggerevents)
 546         {
 547                 FOREACH_MOD(I_OnUserKick,OnUserKick(NULL, user, this, reason, silent));
 548         }
 549
 550         UCListIter i = user->chans.find(this);
 551         if (i != user->chans.end())
 552         {
 553                 if (!silent)
 554                         this->WriteChannelWithServ(servername, "KICK %s %s :%s", this->name.c_str(), user->nick.c_str(), reason);
 555
 556                 user->chans.erase(i);
 557                 this->RemoveAllPrefixes(user);
 558         }
 559
 560         if (!this->DelUser(user))
 561         {
 562                 chan_hash::iterator iter = ServerInstance->chanlist->find(this->name);
 563                 /* kill the record */
 564                 if (iter != ServerInstance->chanlist->end())
 565                 {
 566                         int MOD_RESULT = 0;
 567                         FOREACH_RESULT_I(ServerInstance,I_OnChannelPreDelete, OnChannelPreDelete(this));
 568                         if (MOD_RESULT == 1)
 569                                 return 1; // delete halted by module
 570                         FOREACH_MOD(I_OnChannelDelete, OnChannelDelete(this));
 571                         ServerInstance->chanlist->erase(iter);
 572                 }
 573                 return 0;
 574         }
 575
 576         return this->GetUserCounter();
 577 }
 578
 579 long Channel::KickUser(User *src, User *user, const char* reason)
 580 {
 581         bool silent = false;
 582
 583         if (!src || !user || !reason)
 584                 return this->GetUserCounter();
 585
 586         if (IS_LOCAL(src))
 587         {
 588                 if (!this->HasUser(user))
 589                 {
 590                         src->WriteNumeric(441, "%s %s %s :They are not on that channel",src->nick.c_str(), user->nick.c_str(), this->name.c_str());
 591                         return this->GetUserCounter();
 592                 }
 593                 if ((ServerInstance->ULine(user->server)) && (!ServerInstance->ULine(src->server)))
 594                 {
 595                         src->WriteNumeric(482, "%s %s :Only a u-line may kick a u-line from a channel.",src->nick.c_str(), this->name.c_str());
 596                         return this->GetUserCounter();
 597                 }
 598                 int MOD_RESULT = 0;
 599
 600                 if (!ServerInstance->ULine(src->server))
 601                 {
 602                         MOD_RESULT = 0;
 603                         FOREACH_RESULT(I_OnUserPreKick,OnUserPreKick(src,user,this,reason));
 604                         if (MOD_RESULT == 1)
 605                                 return this->GetUserCounter();
 606                 }
 607                 /* Set to -1 by OnUserPreKick if explicit allow was set */
 608                 if (MOD_RESULT != -1)
 609                 {
 610                         FOREACH_RESULT(I_OnAccessCheck,OnAccessCheck(src,user,this,AC_KICK));
 611                         if ((MOD_RESULT == ACR_DENY) && (!ServerInstance->ULine(src->server)))
 612                                 return this->GetUserCounter();
 613
 614                         if ((MOD_RESULT == ACR_DEFAULT) || (!ServerInstance->ULine(src->server)))
 615                         {
 616                                 int them = this->GetStatus(src);
 617                                 int us = this->GetStatus(user);
 618                                 if ((them < STATUS_HOP) || (them < us))
 619                                 {
 620                                         src->WriteNumeric(482, "%s %s :You must be a channel %soperator",src->nick.c_str(), this->name.c_str(), them == STATUS_HOP ? "" : "half-");
 621                                         return this->GetUserCounter();
 622                                 }
 623                         }
 624                 }
 625         }
 626
 627         FOREACH_MOD(I_OnUserKick,OnUserKick(src, user, this, reason, silent));
 628
 629         UCListIter i = user->chans.find(this);
 630         if (i != user->chans.end())
 631         {
 632                 /* zap it from the channel list of the user */
 633                 if (!silent)
 634                         this->WriteChannel(src, "KICK %s %s :%s", this->name.c_str(), user->nick.c_str(), reason);
 635
 636                 user->chans.erase(i);
 637                 this->RemoveAllPrefixes(user);
 638         }
 639
 640         if (!this->DelUser(user))
 641         /* if there are no users left on the channel */
 642         {
 643                 chan_hash::iterator iter = ServerInstance->chanlist->find(this->name.c_str());
 644
 645                 /* kill the record */
 646                 if (iter != ServerInstance->chanlist->end())
 647                 {
 648                         int MOD_RESULT = 0;
 649                         FOREACH_RESULT_I(ServerInstance,I_OnChannelPreDelete, OnChannelPreDelete(this));
 650                         if (MOD_RESULT == 1)
 651                                 return 1; // delete halted by module
 652                         FOREACH_MOD(I_OnChannelDelete, OnChannelDelete(this));
 653                         ServerInstance->chanlist->erase(iter);
 654                 }
 655                 return 0;
 656         }
 657
 658         return this->GetUserCounter();
 659 }
 660
 661 void Channel::WriteChannel(User* user, const char* text, ...)
 662 {
 663         char textbuffer[MAXBUF];
 664         va_list argsPtr;
 665
 666         if (!user || !text)
 667                 return;
 668
 669         va_start(argsPtr, text);
 670         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 671         va_end(argsPtr);
 672
 673         this->WriteChannel(user, std::string(textbuffer));
 674 }
 675
 676 void Channel::WriteChannel(User* user, const std::string &text)
 677 {
 678         CUList *ulist = this->GetUsers();
 679         char tb[MAXBUF];
 680
 681         if (!user)
 682                 return;
 683
 684         snprintf(tb,MAXBUF,":%s %s", user->GetFullHost().c_str(), text.c_str());
 685         std::string out = tb;
 686
 687         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
 688         {
 689                 if (IS_LOCAL(i->first))
 690                         i->first->Write(out);
 691         }
 692 }
 693
 694 void Channel::WriteChannelWithServ(const char* ServName, const char* text, ...)
 695 {
 696         char textbuffer[MAXBUF];
 697         va_list argsPtr;
 698
 699         if (!text)
 700                 return;
 701
 702         va_start(argsPtr, text);
 703         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 704         va_end(argsPtr);
 705
 706         this->WriteChannelWithServ(ServName, std::string(textbuffer));
 707 }
 708
 709 void Channel::WriteChannelWithServ(const char* ServName, const std::string &text)
 710 {
 711         CUList *ulist = this->GetUsers();
 712         char tb[MAXBUF];
 713
 714         snprintf(tb,MAXBUF,":%s %s", ServName ? ServName : ServerInstance->Config->ServerName, text.c_str());
 715         std::string out = tb;
 716
 717         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
 718         {
 719                 if (IS_LOCAL(i->first))
 720                         i->first->Write(out);
 721         }
 722 }
 723
 724 /* write formatted text from a source user to all users on a channel except
 725  * for the sender (for privmsg etc) */
 726 void Channel::WriteAllExceptSender(User* user, bool serversource, char status, const char* text, ...)
 727 {
 728         char textbuffer[MAXBUF];
 729         va_list argsPtr;
 730
 731         if (!text)
 732                 return;
 733
 734         va_start(argsPtr, text);
 735         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 736         va_end(argsPtr);
 737
 738         this->WriteAllExceptSender(user, serversource, status, std::string(textbuffer));
 739 }
 740
 741 void Channel::WriteAllExcept(User* user, bool serversource, char status, CUList &except_list, const char* text, ...)
 742 {
 743         char textbuffer[MAXBUF];
 744         va_list argsPtr;
 745
 746         if (!text)
 747                 return;
 748
 749         va_start(argsPtr, text);
 750         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 751         va_end(argsPtr);
 752
 753         this->WriteAllExcept(user, serversource, status, except_list, std::string(textbuffer));
 754 }
 755
 756 void Channel::WriteAllExcept(User* user, bool serversource, char status, CUList &except_list, const std::string &text)
 757 {
 758         CUList *ulist = this->GetUsers();
 759         char tb[MAXBUF];
 760
 761         snprintf(tb,MAXBUF,":%s %s", user->GetFullHost().c_str(), text.c_str());
 762         std::string out = tb;
 763
 764         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
 765         {
 766                 if ((IS_LOCAL(i->first)) && (except_list.find(i->first) == except_list.end()))
 767                 {
 768                         /* User doesnt have the status we're after */
 769                         if (status && !strchr(this->GetAllPrefixChars(i->first), status))
 770                                 continue;
 771
 772                         if (serversource)
 773                                 i->first->WriteServ(text);
 774                         else
 775                                 i->first->Write(out);
 776                 }
 777         }
 778 }
 779
 780 void Channel::WriteAllExceptSender(User* user, bool serversource, char status, const std::string& text)
 781 {
 782         CUList except_list;
 783         except_list[user] = user->nick;
 784         this->WriteAllExcept(user, serversource, status, except_list, std::string(text));
 785 }
 786
 787 /*
 788  * return a count of the users on a specific channel accounting for
 789  * invisible users who won't increase the count. e.g. for /LIST
 790  */
 791 int Channel::CountInvisible()
 792 {
 793         int count = 0;
 794         CUList *ulist= this->GetUsers();
 795         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
 796         {
 797                 if (!(i->first->IsModeSet('i')))
 798                         count++;
 799         }
 800
 801         return count;
 802 }
 803
 804 char* Channel::ChanModes(bool showkey)
 805 {
 806         static char scratch[MAXBUF];
 807         static char sparam[MAXBUF];
 808         char* offset = scratch;
 809         std::string extparam;
 810
 811         *scratch = '\0';
 812         *sparam = '\0';
 813
 814         /* This was still iterating up to 190, Channel::modes is only 64 elements -- Om */
 815         for(int n = 0; n < 64; n++)
 816         {
 817                 if(this->modes[n])
 818                 {
 819                         *offset++ = n + 65;
 820                         extparam.clear();
 821                         switch (n)
 822                         {
 823                                 case CM_KEY:
 824                                         extparam = (showkey ? this->key : "<key>");
 825                                 break;
 826                                 case CM_LIMIT:
 827                                         extparam = ConvToStr(this->limit);
 828                                 break;
 829                                 case CM_NOEXTERNAL:
 830                                 case CM_TOPICLOCK:
 831                                 case CM_INVITEONLY:
 832                                 case CM_MODERATED:
 833                                 case CM_SECRET:
 834                                 case CM_PRIVATE:
 835                                         /* We know these have no parameters */
 836                                 break;
 837                                 default:
 838                                         extparam = this->GetModeParameter(n + 65);
 839                                 break;
 840                         }
 841                         if (!extparam.empty())
 842                         {
 843                                 charlcat(sparam,' ',MAXBUF);
 844                                 strlcat(sparam,extparam.c_str(),MAXBUF);
 845                         }
 846                 }
 847         }
 848
 849         /* Null terminate scratch */
 850         *offset = '\0';
 851         strlcat(scratch,sparam,MAXBUF);
 852         return scratch;
 853 }
 854
 855 /* compile a userlist of a channel into a string, each nick seperated by
 856  * spaces and op, voice etc status shown as @ and +, and send it to 'user'
 857  */
 858 void Channel::UserList(User *user, CUList *ulist)
 859 {
 860         char list[MAXBUF];
 861         size_t dlen, curlen;
 862         int MOD_RESULT = 0;
 863         bool call_modules = true;
 864
 865         if (!IS_LOCAL(user))
 866                 return;
 867
 868         FOREACH_RESULT(I_OnUserList,OnUserList(user, this, ulist));
 869         if (MOD_RESULT == 1)
 870                 call_modules = false;
 871
 872         if (MOD_RESULT != -1)
 873         {
 874                 if ((this->IsModeSet('s')) && (!this->HasUser(user)))
 875                 {
 876                         user->WriteNumeric(401, "%s %s :No such nick/channel",user->nick.c_str(), this->name.c_str());
 877                         return;
 878                 }
 879         }
 880
 881         dlen = curlen = snprintf(list,MAXBUF,"%s %c %s :", user->nick.c_str(), this->IsModeSet('s') ? '@' : this->IsModeSet('p') ? '*' : '=',  this->name.c_str());
 882
 883         int numusers = 0;
 884         char* ptr = list + dlen;
 885
 886         if (!ulist)
 887                 ulist = this->GetUsers();
 888
 889         /* Improvement by Brain - this doesnt change in value, so why was it inside
 890          * the loop?
 891          */
 892         bool has_user = this->HasUser(user);
 893
 894         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
 895         {
 896                 if ((!has_user) && (i->first->IsModeSet('i')))
 897                 {
 898                         /*
 899                          * user is +i, and source not on the channel, does not show
 900                          * nick in NAMES list
 901                          */
 902                         continue;
 903                 }
 904
 905                 if (i->first->Visibility && !i->first->Visibility->VisibleTo(user))
 906                         continue;
 907
 908                 std::string prefixlist = this->GetPrefixChar(i->first);
 909                 std::string nick = i->first->nick;
 910
 911                 if (call_modules)
 912                 {
 913                         FOREACH_MOD(I_OnNamesListItem, OnNamesListItem(user, i->first, this, prefixlist, nick));
 914
 915                         /* Nick was nuked, a module wants us to skip it */
 916                         if (nick.empty())
 917                                 continue;
 918                 }
 919
 920                 size_t ptrlen = 0;
 921
 922                 if (curlen + prefixlist.length() + nick.length() + 1 > 480)
 923                 {
 924                         /* list overflowed into multiple numerics */
 925                         user->WriteServ(std::string(list));
 926
 927                         /* reset our lengths */
 928                         dlen = curlen = snprintf(list,MAXBUF,"%s %c %s :", user->nick.c_str(), this->IsModeSet('s') ? '@' : this->IsModeSet('p') ? '*' : '=', this->name.c_str());
 929                         ptr = list + dlen;
 930
 931                         ptrlen = 0;
 932                         numusers = 0;
 933                 }
 934
 935                 ptrlen = snprintf(ptr, MAXBUF, "%s%s ", prefixlist.c_str(), nick.c_str());
 936
 937                 curlen += ptrlen;
 938                 ptr += ptrlen;
 939
 940                 numusers++;
 941         }
 942
 943         /* if whats left in the list isnt empty, send it */
 944         if (numusers)
 945         {
 946                 user->WriteNumeric(353,std::string(list));
 947         }
 948
 949         user->WriteNumeric(366, "%s %s :End of /NAMES list.", user->nick.c_str(), this->name.c_str());
 950 }
 951
 952 long Channel::GetMaxBans()
 953 {
 954         /* Return the cached value if there is one */
 955         if (this->maxbans)
 956                 return this->maxbans;
 957
 958         /* If there isnt one, we have to do some O(n) hax to find it the first time. (ick) */
 959         for (std::map<std::string,int>::iterator n = ServerInstance->Config->maxbans.begin(); n != ServerInstance->Config->maxbans.end(); n++)
 960         {
 961                 if (match(this->name,n->first))
 962                 {
 963                         this->maxbans = n->second;
 964                         return n->second;
 965                 }
 966         }
 967
 968         /* Screw it, just return the default of 64 */
 969         this->maxbans = 64;
 970         return this->maxbans;
 971 }
 972
 973 void Channel::ResetMaxBans()
 974 {
 975         this->maxbans = 0;
 976 }
 977
 978 /* returns the status character for a given user on a channel, e.g. @ for op,
 979  * % for halfop etc. If the user has several modes set, the highest mode
 980  * the user has must be returned.
 981  */
 982 const char* Channel::GetPrefixChar(User *user)
 983 {
 984         static char pf[2] = {0, 0};
 985
 986         prefixlist::iterator n = prefixes.find(user);
 987         if (n != prefixes.end())
 988         {
 989                 if (n->second.size())
 990                 {
 991                         /* If the user has any prefixes, their highest prefix
 992                          * will always be at the head of the list, as the list is
 993                          * sorted in rank order highest first (see SetPrefix()
 994                          * for reasons why)
 995                          */
 996                         *pf = n->second.begin()->first;
 997                         return pf;
 998                 }
 999         }
1000
1001         *pf = 0;
1002         return pf;
1003 }
1004
1005
1006 const char* Channel::GetAllPrefixChars(User* user)
1007 {
1008         static char prefix[MAXBUF];
1009         int ctr = 0;
1010         *prefix = 0;
1011
1012         prefixlist::iterator n = prefixes.find(user);
1013         if (n != prefixes.end())
1014         {
1015                 for (std::vector<prefixtype>::iterator x = n->second.begin(); x != n->second.end(); x++)
1016                 {
1017                         prefix[ctr++] = x->first;
1018                 }
1019         }
1020
1021         prefix[ctr] = 0;
1022
1023         return prefix;
1024 }
1025
1026 unsigned int Channel::GetPrefixValue(User* user)
1027 {
1028         prefixlist::iterator n = prefixes.find(user);
1029         if (n != prefixes.end())
1030         {
1031                 if (n->second.size())
1032                         return n->second.begin()->second;
1033         }
1034         return 0;
1035 }
1036
1037 int Channel::GetStatusFlags(User *user)
1038 {
1039         UCListIter i = user->chans.find(this);
1040         if (i != user->chans.end())
1041         {
1042                 return i->second;
1043         }
1044         return 0;
1045 }
1046
1047 int Channel::GetStatus(User *user)
1048 {
1049         if (ServerInstance->ULine(user->server))
1050                 return STATUS_OP;
1051
1052         UCListIter i = user->chans.find(this);
1053         if (i != user->chans.end())
1054         {
1055                 if ((i->second & UCMODE_OP) > 0)
1056                 {
1057                         return STATUS_OP;
1058                 }
1059                 if ((i->second & UCMODE_HOP) > 0)
1060                 {
1061                         return STATUS_HOP;
1062                 }
1063                 if ((i->second & UCMODE_VOICE) > 0)
1064                 {
1065                         return STATUS_VOICE;
1066                 }
1067                 return STATUS_NORMAL;
1068         }
1069         return STATUS_NORMAL;
1070 }
1071
1072 void Channel::SetPrefix(User* user, char prefix, unsigned int prefix_value, bool adding)
1073 {
1074         prefixlist::iterator n = prefixes.find(user);
1075         prefixtype pfx = std::make_pair(prefix,prefix_value);
1076         if (adding)
1077         {
1078                 if (n != prefixes.end())
1079                 {
1080                         if (std::find(n->second.begin(), n->second.end(), pfx) == n->second.end())
1081                         {
1082                                 n->second.push_back(pfx);
1083                                 /* We must keep prefixes in rank order, largest first.
1084                                  * This is for two reasons, firstly because x-chat *ass-u-me's* this
1085                                  * state, and secondly it turns out to be a benefit to us later.
1086                                  * See above in GetPrefix().
1087                                  */
1088                                 std::sort(n->second.begin(), n->second.end(), ModeParser::PrefixComparison);
1089                         }
1090                 }
1091                 else
1092                 {
1093                         pfxcontainer one;
1094                         one.push_back(pfx);
1095                         prefixes.insert(std::make_pair<User*,pfxcontainer>(user, one));
1096                 }
1097         }
1098         else
1099         {
1100                 if (n != prefixes.end())
1101                 {
1102                         pfxcontainer::iterator x = std::find(n->second.begin(), n->second.end(), pfx);
1103                         if (x != n->second.end())
1104                                 n->second.erase(x);
1105                 }
1106         }
1107 }
1108
1109 void Channel::RemoveAllPrefixes(User* user)
1110 {
1111         prefixlist::iterator n = prefixes.find(user);
1112         if (n != prefixes.end())
1113         {
1114                 prefixes.erase(n);
1115         }
1116 }
1117