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         char mask[MAXBUF];
 457         int MOD_RESULT = 0;
 458         FOREACH_RESULT(I_OnCheckExtBan,OnCheckExtBan(user, this, type));
 459
 460         if (MOD_RESULT == -1)
 461                 return true;
 462         else if (MOD_RESULT == 0)
 463         {
 464                 snprintf(mask, MAXBUF, "%s!%s@%s", user->nick.c_str(), user->ident.c_str(), user->GetIPString());
 465
 466                 for (BanList::iterator i = this->bans.begin(); i != this->bans.end(); i++)
 467                 {
 468                         if (i->data[0] != type || i->data[1] != ':')
 469                                 continue;
 470
 471                         // Iterate past char and : to get to the mask without doing a data copy(!)
 472                         std::string maskptr = i->data.substr(2);
 473
 474                         /* This allows CIDR ban matching
 475                          *
 476                          *        Full masked host                             Full unmasked host                     IP with/without CIDR
 477                         */
 478                         if ((match(user->GetFullHost(), maskptr)) || (match(user->GetFullRealHost(), maskptr)) || (match(mask, maskptr, true)))
 479                         {
 480                                 return true;
 481                         }
 482                 }
 483         }
 484
 485         return false;
 486 }
 487
 488 /* Channel::PartUser
 489  * remove a channel from a users record, and return the number of users left.
 490  * Therefore, if this function returns 0 the caller should delete the Channel.
 491  *
 492  * XXX: bleh, string copy of reason, fixme! -- w00t
 493  */
 494 long Channel::PartUser(User *user, std::string &reason)
 495 {
 496         bool silent = false;
 497
 498         if (!user)
 499                 return this->GetUserCounter();
 500
 501         UCListIter i = user->chans.find(this);
 502         if (i != user->chans.end())
 503         {
 504                 FOREACH_MOD(I_OnUserPart,OnUserPart(user, this, reason, silent));
 505
 506                 if (!silent)
 507                         this->WriteChannel(user, "PART %s%s%s", this->name.c_str(), reason.empty() ? "" : ":", reason.c_str());
 508
 509                 user->chans.erase(i);
 510                 this->RemoveAllPrefixes(user);
 511         }
 512
 513         if (!this->DelUser(user)) /* if there are no users left on the channel... */
 514         {
 515                 chan_hash::iterator iter = ServerInstance->chanlist->find(this->name);
 516                 /* kill the record */
 517                 if (iter != ServerInstance->chanlist->end())
 518                 {
 519                         int MOD_RESULT = 0;
 520                         FOREACH_RESULT_I(ServerInstance,I_OnChannelPreDelete, OnChannelPreDelete(this));
 521                         if (MOD_RESULT == 1)
 522                                 return 1; // delete halted by module
 523                         FOREACH_MOD(I_OnChannelDelete, OnChannelDelete(this));
 524                         ServerInstance->chanlist->erase(iter);
 525                 }
 526                 return 0;
 527         }
 528
 529         return this->GetUserCounter();
 530 }
 531
 532 long Channel::ServerKickUser(User* user, const char* reason, bool triggerevents, const char* servername)
 533 {
 534         bool silent = false;
 535
 536         if (!user || !reason)
 537                 return this->GetUserCounter();
 538
 539         if (IS_LOCAL(user))
 540         {
 541                 if (!this->HasUser(user))
 542                 {
 543                         /* Not on channel */
 544                         return this->GetUserCounter();
 545                 }
 546         }
 547
 548         if (servername == NULL || *ServerInstance->Config->HideWhoisServer)
 549                 servername = ServerInstance->Config->ServerName;
 550
 551         if (triggerevents)
 552         {
 553                 FOREACH_MOD(I_OnUserKick,OnUserKick(NULL, user, this, reason, silent));
 554         }
 555
 556         UCListIter i = user->chans.find(this);
 557         if (i != user->chans.end())
 558         {
 559                 if (!silent)
 560                         this->WriteChannelWithServ(servername, "KICK %s %s :%s", this->name.c_str(), user->nick.c_str(), reason);
 561
 562                 user->chans.erase(i);
 563                 this->RemoveAllPrefixes(user);
 564         }
 565
 566         if (!this->DelUser(user))
 567         {
 568                 chan_hash::iterator iter = ServerInstance->chanlist->find(this->name);
 569                 /* kill the record */
 570                 if (iter != ServerInstance->chanlist->end())
 571                 {
 572                         int MOD_RESULT = 0;
 573                         FOREACH_RESULT_I(ServerInstance,I_OnChannelPreDelete, OnChannelPreDelete(this));
 574                         if (MOD_RESULT == 1)
 575                                 return 1; // delete halted by module
 576                         FOREACH_MOD(I_OnChannelDelete, OnChannelDelete(this));
 577                         ServerInstance->chanlist->erase(iter);
 578                 }
 579                 return 0;
 580         }
 581
 582         return this->GetUserCounter();
 583 }
 584
 585 long Channel::KickUser(User *src, User *user, const char* reason)
 586 {
 587         bool silent = false;
 588
 589         if (!src || !user || !reason)
 590                 return this->GetUserCounter();
 591
 592         if (IS_LOCAL(src))
 593         {
 594                 if (!this->HasUser(user))
 595                 {
 596                         src->WriteNumeric(441, "%s %s %s :They are not on that channel",src->nick.c_str(), user->nick.c_str(), this->name.c_str());
 597                         return this->GetUserCounter();
 598                 }
 599                 if ((ServerInstance->ULine(user->server)) && (!ServerInstance->ULine(src->server)))
 600                 {
 601                         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());
 602                         return this->GetUserCounter();
 603                 }
 604                 int MOD_RESULT = 0;
 605
 606                 if (!ServerInstance->ULine(src->server))
 607                 {
 608                         MOD_RESULT = 0;
 609                         FOREACH_RESULT(I_OnUserPreKick,OnUserPreKick(src,user,this,reason));
 610                         if (MOD_RESULT == 1)
 611                                 return this->GetUserCounter();
 612                 }
 613                 /* Set to -1 by OnUserPreKick if explicit allow was set */
 614                 if (MOD_RESULT != -1)
 615                 {
 616                         FOREACH_RESULT(I_OnAccessCheck,OnAccessCheck(src,user,this,AC_KICK));
 617                         if ((MOD_RESULT == ACR_DENY) && (!ServerInstance->ULine(src->server)))
 618                                 return this->GetUserCounter();
 619
 620                         if ((MOD_RESULT == ACR_DEFAULT) || (!ServerInstance->ULine(src->server)))
 621                         {
 622                                 int them = this->GetStatus(src);
 623                                 int us = this->GetStatus(user);
 624                                 if ((them < STATUS_HOP) || (them < us))
 625                                 {
 626                                         src->WriteNumeric(482, "%s %s :You must be a channel %soperator",src->nick.c_str(), this->name.c_str(), them == STATUS_HOP ? "" : "half-");
 627                                         return this->GetUserCounter();
 628                                 }
 629                         }
 630                 }
 631         }
 632
 633         FOREACH_MOD(I_OnUserKick,OnUserKick(src, user, this, reason, silent));
 634
 635         UCListIter i = user->chans.find(this);
 636         if (i != user->chans.end())
 637         {
 638                 /* zap it from the channel list of the user */
 639                 if (!silent)
 640                         this->WriteChannel(src, "KICK %s %s :%s", this->name.c_str(), user->nick.c_str(), reason);
 641
 642                 user->chans.erase(i);
 643                 this->RemoveAllPrefixes(user);
 644         }
 645
 646         if (!this->DelUser(user))
 647         /* if there are no users left on the channel */
 648         {
 649                 chan_hash::iterator iter = ServerInstance->chanlist->find(this->name.c_str());
 650
 651                 /* kill the record */
 652                 if (iter != ServerInstance->chanlist->end())
 653                 {
 654                         int MOD_RESULT = 0;
 655                         FOREACH_RESULT_I(ServerInstance,I_OnChannelPreDelete, OnChannelPreDelete(this));
 656                         if (MOD_RESULT == 1)
 657                                 return 1; // delete halted by module
 658                         FOREACH_MOD(I_OnChannelDelete, OnChannelDelete(this));
 659                         ServerInstance->chanlist->erase(iter);
 660                 }
 661                 return 0;
 662         }
 663
 664         return this->GetUserCounter();
 665 }
 666
 667 void Channel::WriteChannel(User* user, const char* text, ...)
 668 {
 669         char textbuffer[MAXBUF];
 670         va_list argsPtr;
 671
 672         if (!user || !text)
 673                 return;
 674
 675         va_start(argsPtr, text);
 676         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 677         va_end(argsPtr);
 678
 679         this->WriteChannel(user, std::string(textbuffer));
 680 }
 681
 682 void Channel::WriteChannel(User* user, const std::string &text)
 683 {
 684         CUList *ulist = this->GetUsers();
 685         char tb[MAXBUF];
 686
 687         if (!user)
 688                 return;
 689
 690         snprintf(tb,MAXBUF,":%s %s", user->GetFullHost().c_str(), text.c_str());
 691         std::string out = tb;
 692
 693         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
 694         {
 695                 if (IS_LOCAL(i->first))
 696                         i->first->Write(out);
 697         }
 698 }
 699
 700 void Channel::WriteChannelWithServ(const char* ServName, const char* text, ...)
 701 {
 702         char textbuffer[MAXBUF];
 703         va_list argsPtr;
 704
 705         if (!text)
 706                 return;
 707
 708         va_start(argsPtr, text);
 709         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 710         va_end(argsPtr);
 711
 712         this->WriteChannelWithServ(ServName, std::string(textbuffer));
 713 }
 714
 715 void Channel::WriteChannelWithServ(const char* ServName, const std::string &text)
 716 {
 717         CUList *ulist = this->GetUsers();
 718         char tb[MAXBUF];
 719
 720         snprintf(tb,MAXBUF,":%s %s", ServName ? ServName : ServerInstance->Config->ServerName, text.c_str());
 721         std::string out = tb;
 722
 723         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
 724         {
 725                 if (IS_LOCAL(i->first))
 726                         i->first->Write(out);
 727         }
 728 }
 729
 730 /* write formatted text from a source user to all users on a channel except
 731  * for the sender (for privmsg etc) */
 732 void Channel::WriteAllExceptSender(User* user, bool serversource, char status, const char* text, ...)
 733 {
 734         char textbuffer[MAXBUF];
 735         va_list argsPtr;
 736
 737         if (!text)
 738                 return;
 739
 740         va_start(argsPtr, text);
 741         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 742         va_end(argsPtr);
 743
 744         this->WriteAllExceptSender(user, serversource, status, std::string(textbuffer));
 745 }
 746
 747 void Channel::WriteAllExcept(User* user, bool serversource, char status, CUList &except_list, const char* text, ...)
 748 {
 749         char textbuffer[MAXBUF];
 750         va_list argsPtr;
 751
 752         if (!text)
 753                 return;
 754
 755         va_start(argsPtr, text);
 756         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 757         va_end(argsPtr);
 758
 759         this->WriteAllExcept(user, serversource, status, except_list, std::string(textbuffer));
 760 }
 761
 762 void Channel::WriteAllExcept(User* user, bool serversource, char status, CUList &except_list, const std::string &text)
 763 {
 764         CUList *ulist = this->GetUsers();
 765         char tb[MAXBUF];
 766
 767         snprintf(tb,MAXBUF,":%s %s", user->GetFullHost().c_str(), text.c_str());
 768         std::string out = tb;
 769
 770         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
 771         {
 772                 if ((IS_LOCAL(i->first)) && (except_list.find(i->first) == except_list.end()))
 773                 {
 774                         /* User doesnt have the status we're after */
 775                         if (status && !strchr(this->GetAllPrefixChars(i->first), status))
 776                                 continue;
 777
 778                         if (serversource)
 779                                 i->first->WriteServ(text);
 780                         else
 781                                 i->first->Write(out);
 782                 }
 783         }
 784 }
 785
 786 void Channel::WriteAllExceptSender(User* user, bool serversource, char status, const std::string& text)
 787 {
 788         CUList except_list;
 789         except_list[user] = user->nick;
 790         this->WriteAllExcept(user, serversource, status, except_list, std::string(text));
 791 }
 792
 793 /*
 794  * return a count of the users on a specific channel accounting for
 795  * invisible users who won't increase the count. e.g. for /LIST
 796  */
 797 int Channel::CountInvisible()
 798 {
 799         int count = 0;
 800         CUList *ulist= this->GetUsers();
 801         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
 802         {
 803                 if (!(i->first->IsModeSet('i')))
 804                         count++;
 805         }
 806
 807         return count;
 808 }
 809
 810 char* Channel::ChanModes(bool showkey)
 811 {
 812         static char scratch[MAXBUF];
 813         static char sparam[MAXBUF];
 814         char* offset = scratch;
 815         std::string extparam;
 816
 817         *scratch = '\0';
 818         *sparam = '\0';
 819
 820         /* This was still iterating up to 190, Channel::modes is only 64 elements -- Om */
 821         for(int n = 0; n < 64; n++)
 822         {
 823                 if(this->modes[n])
 824                 {
 825                         *offset++ = n + 65;
 826                         extparam.clear();
 827                         switch (n)
 828                         {
 829                                 case CM_KEY:
 830                                         extparam = (showkey ? this->key : "<key>");
 831                                 break;
 832                                 case CM_LIMIT:
 833                                         extparam = ConvToStr(this->limit);
 834                                 break;
 835                                 case CM_NOEXTERNAL:
 836                                 case CM_TOPICLOCK:
 837                                 case CM_INVITEONLY:
 838                                 case CM_MODERATED:
 839                                 case CM_SECRET:
 840                                 case CM_PRIVATE:
 841                                         /* We know these have no parameters */
 842                                 break;
 843                                 default:
 844                                         extparam = this->GetModeParameter(n + 65);
 845                                 break;
 846                         }
 847                         if (!extparam.empty())
 848                         {
 849                                 charlcat(sparam,' ',MAXBUF);
 850                                 strlcat(sparam,extparam.c_str(),MAXBUF);
 851                         }
 852                 }
 853         }
 854
 855         /* Null terminate scratch */
 856         *offset = '\0';
 857         strlcat(scratch,sparam,MAXBUF);
 858         return scratch;
 859 }
 860
 861 /* compile a userlist of a channel into a string, each nick seperated by
 862  * spaces and op, voice etc status shown as @ and +, and send it to 'user'
 863  */
 864 void Channel::UserList(User *user, CUList *ulist)
 865 {
 866         char list[MAXBUF];
 867         size_t dlen, curlen;
 868         int MOD_RESULT = 0;
 869         bool call_modules = true;
 870
 871         if (!IS_LOCAL(user))
 872                 return;
 873
 874         FOREACH_RESULT(I_OnUserList,OnUserList(user, this, ulist));
 875         if (MOD_RESULT == 1)
 876                 call_modules = false;
 877
 878         if (MOD_RESULT != -1)
 879         {
 880                 if ((this->IsModeSet('s')) && (!this->HasUser(user)))
 881                 {
 882                         user->WriteNumeric(401, "%s %s :No such nick/channel",user->nick.c_str(), this->name.c_str());
 883                         return;
 884                 }
 885         }
 886
 887         dlen = curlen = snprintf(list,MAXBUF,"%s %c %s :", user->nick.c_str(), this->IsModeSet('s') ? '@' : this->IsModeSet('p') ? '*' : '=',  this->name.c_str());
 888
 889         int numusers = 0;
 890         char* ptr = list + dlen;
 891
 892         if (!ulist)
 893                 ulist = this->GetUsers();
 894
 895         /* Improvement by Brain - this doesnt change in value, so why was it inside
 896          * the loop?
 897          */
 898         bool has_user = this->HasUser(user);
 899
 900         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
 901         {
 902                 if ((!has_user) && (i->first->IsModeSet('i')))
 903                 {
 904                         /*
 905                          * user is +i, and source not on the channel, does not show
 906                          * nick in NAMES list
 907                          */
 908                         continue;
 909                 }
 910
 911                 if (i->first->Visibility && !i->first->Visibility->VisibleTo(user))
 912                         continue;
 913
 914                 std::string prefixlist = this->GetPrefixChar(i->first);
 915                 std::string nick = i->first->nick;
 916
 917                 if (call_modules)
 918                 {
 919                         FOREACH_MOD(I_OnNamesListItem, OnNamesListItem(user, i->first, this, prefixlist, nick));
 920
 921                         /* Nick was nuked, a module wants us to skip it */
 922                         if (nick.empty())
 923                                 continue;
 924                 }
 925
 926                 size_t ptrlen = 0;
 927
 928                 if (curlen + prefixlist.length() + nick.length() + 1 > 480)
 929                 {
 930                         /* list overflowed into multiple numerics */
 931                         user->WriteServ(std::string(list));
 932
 933                         /* reset our lengths */
 934                         dlen = curlen = snprintf(list,MAXBUF,"%s %c %s :", user->nick.c_str(), this->IsModeSet('s') ? '@' : this->IsModeSet('p') ? '*' : '=', this->name.c_str());
 935                         ptr = list + dlen;
 936
 937                         ptrlen = 0;
 938                         numusers = 0;
 939                 }
 940
 941                 ptrlen = snprintf(ptr, MAXBUF, "%s%s ", prefixlist.c_str(), nick.c_str());
 942
 943                 curlen += ptrlen;
 944                 ptr += ptrlen;
 945
 946                 numusers++;
 947         }
 948
 949         /* if whats left in the list isnt empty, send it */
 950         if (numusers)
 951         {
 952                 user->WriteNumeric(353,std::string(list));
 953         }
 954
 955         user->WriteNumeric(366, "%s %s :End of /NAMES list.", user->nick.c_str(), this->name.c_str());
 956 }
 957
 958 long Channel::GetMaxBans()
 959 {
 960         /* Return the cached value if there is one */
 961         if (this->maxbans)
 962                 return this->maxbans;
 963
 964         /* If there isnt one, we have to do some O(n) hax to find it the first time. (ick) */
 965         for (std::map<std::string,int>::iterator n = ServerInstance->Config->maxbans.begin(); n != ServerInstance->Config->maxbans.end(); n++)
 966         {
 967                 if (match(this->name,n->first))
 968                 {
 969                         this->maxbans = n->second;
 970                         return n->second;
 971                 }
 972         }
 973
 974         /* Screw it, just return the default of 64 */
 975         this->maxbans = 64;
 976         return this->maxbans;
 977 }
 978
 979 void Channel::ResetMaxBans()
 980 {
 981         this->maxbans = 0;
 982 }
 983
 984 /* returns the status character for a given user on a channel, e.g. @ for op,
 985  * % for halfop etc. If the user has several modes set, the highest mode
 986  * the user has must be returned.
 987  */
 988 const char* Channel::GetPrefixChar(User *user)
 989 {
 990         static char pf[2] = {0, 0};
 991
 992         prefixlist::iterator n = prefixes.find(user);
 993         if (n != prefixes.end())
 994         {
 995                 if (n->second.size())
 996                 {
 997                         /* If the user has any prefixes, their highest prefix
 998                          * will always be at the head of the list, as the list is
 999                          * sorted in rank order highest first (see SetPrefix()
1000                          * for reasons why)
1001                          */
1002                         *pf = n->second.begin()->first;
1003                         return pf;
1004                 }
1005         }
1006
1007         *pf = 0;
1008         return pf;
1009 }
1010
1011
1012 const char* Channel::GetAllPrefixChars(User* user)
1013 {
1014         static char prefix[MAXBUF];
1015         int ctr = 0;
1016         *prefix = 0;
1017
1018         prefixlist::iterator n = prefixes.find(user);
1019         if (n != prefixes.end())
1020         {
1021                 for (std::vector<prefixtype>::iterator x = n->second.begin(); x != n->second.end(); x++)
1022                 {
1023                         prefix[ctr++] = x->first;
1024                 }
1025         }
1026
1027         prefix[ctr] = 0;
1028
1029         return prefix;
1030 }
1031
1032 unsigned int Channel::GetPrefixValue(User* user)
1033 {
1034         prefixlist::iterator n = prefixes.find(user);
1035         if (n != prefixes.end())
1036         {
1037                 if (n->second.size())
1038                         return n->second.begin()->second;
1039         }
1040         return 0;
1041 }
1042
1043 int Channel::GetStatusFlags(User *user)
1044 {
1045         UCListIter i = user->chans.find(this);
1046         if (i != user->chans.end())
1047         {
1048                 return i->second;
1049         }
1050         return 0;
1051 }
1052
1053 int Channel::GetStatus(User *user)
1054 {
1055         if (ServerInstance->ULine(user->server))
1056                 return STATUS_OP;
1057
1058         UCListIter i = user->chans.find(this);
1059         if (i != user->chans.end())
1060         {
1061                 if ((i->second & UCMODE_OP) > 0)
1062                 {
1063                         return STATUS_OP;
1064                 }
1065                 if ((i->second & UCMODE_HOP) > 0)
1066                 {
1067                         return STATUS_HOP;
1068                 }
1069                 if ((i->second & UCMODE_VOICE) > 0)
1070                 {
1071                         return STATUS_VOICE;
1072                 }
1073                 return STATUS_NORMAL;
1074         }
1075         return STATUS_NORMAL;
1076 }
1077
1078 void Channel::SetPrefix(User* user, char prefix, unsigned int prefix_value, bool adding)
1079 {
1080         prefixlist::iterator n = prefixes.find(user);
1081         prefixtype pfx = std::make_pair(prefix,prefix_value);
1082         if (adding)
1083         {
1084                 if (n != prefixes.end())
1085                 {
1086                         if (std::find(n->second.begin(), n->second.end(), pfx) == n->second.end())
1087                         {
1088                                 n->second.push_back(pfx);
1089                                 /* We must keep prefixes in rank order, largest first.
1090                                  * This is for two reasons, firstly because x-chat *ass-u-me's* this
1091                                  * state, and secondly it turns out to be a benefit to us later.
1092                                  * See above in GetPrefix().
1093                                  */
1094                                 std::sort(n->second.begin(), n->second.end(), ModeParser::PrefixComparison);
1095                         }
1096                 }
1097                 else
1098                 {
1099                         pfxcontainer one;
1100                         one.push_back(pfx);
1101                         prefixes.insert(std::make_pair<User*,pfxcontainer>(user, one));
1102                 }
1103         }
1104         else
1105         {
1106                 if (n != prefixes.end())
1107                 {
1108                         pfxcontainer::iterator x = std::find(n->second.begin(), n->second.end(), pfx);
1109                         if (x != n->second.end())
1110                                 n->second.erase(x);
1111                 }
1112         }
1113 }
1114
1115 void Channel::RemoveAllPrefixes(User* user)
1116 {
1117         prefixlist::iterator n = prefixes.find(user);
1118         if (n != prefixes.end())
1119         {
1120                 prefixes.erase(n);
1121         }
1122 }
1123