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