src/mode.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2007 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 #include "inspircd.h"
  15 #include "users.h"
  16 #include "modules.h"
  17 #include "inspstring.h"
  18 #include "mode.h"
  19
  20 /* +s (secret) */
  21 #include "modes/cmode_s.h"
  22 /* +p (private) */
  23 #include "modes/cmode_p.h"
  24 /* +b (bans) */
  25 #include "modes/cmode_b.h"
  26 /* +m (moderated) */
  27 #include "modes/cmode_m.h"
  28 /* +t (only (half) ops can change topic) */
  29 #include "modes/cmode_t.h"
  30 /* +n (no external messages) */
  31 #include "modes/cmode_n.h"
  32 /* +i (invite only) */
  33 #include "modes/cmode_i.h"
  34 /* +k (keyed channel) */
  35 #include "modes/cmode_k.h"
  36 /* +l (channel user limit) */
  37 #include "modes/cmode_l.h"
  38 /* +o (channel op) */
  39 #include "modes/cmode_o.h"
  40 /* +h (channel halfop) */
  41 #include "modes/cmode_h.h"
  42 /* +v (channel voice) */
  43 #include "modes/cmode_v.h"
  44 /* +s (server notices) */
  45 #include "modes/umode_s.h"
  46 /* +w (see wallops) */
  47 #include "modes/umode_w.h"
  48 /* +i (invisible) */
  49 #include "modes/umode_i.h"
  50 /* +o (operator) */
  51 #include "modes/umode_o.h"
  52 /* +n (notice mask - our implementation of snomasks) */
  53 #include "modes/umode_n.h"
  54
  55 ModeHandler::ModeHandler(InspIRCd* Instance, char modeletter, int parameters_on, int parameters_off, bool listmode, ModeType type, bool operonly, char mprefix)
  56         : ServerInstance(Instance), mode(modeletter), n_params_on(parameters_on), n_params_off(parameters_off), list(listmode), m_type(type), oper(operonly), prefix(mprefix), count(0)
  57 {
  58 }
  59
  60 ModeHandler::~ModeHandler()
  61 {
  62 }
  63
  64 bool ModeHandler::IsListMode()
  65 {
  66         return list;
  67 }
  68
  69 unsigned int ModeHandler::GetPrefixRank()
  70 {
  71         return 0;
  72 }
  73
  74 unsigned int ModeHandler::GetCount()
  75 {
  76         return 0;
  77 }
  78
  79 void ModeHandler::ChangeCount(int modifier)
  80 {
  81         count += modifier;
  82 }
  83
  84 ModeType ModeHandler::GetModeType()
  85 {
  86         return m_type;
  87 }
  88
  89 bool ModeHandler::NeedsOper()
  90 {
  91         return oper;
  92 }
  93
  94 char ModeHandler::GetPrefix()
  95 {
  96         return prefix;
  97 }
  98
  99 int ModeHandler::GetNumParams(bool adding)
 100 {
 101         return adding ? n_params_on : n_params_off;
 102 }
 103
 104 char ModeHandler::GetModeChar()
 105 {
 106         return mode;
 107 }
 108
 109 ModeAction ModeHandler::OnModeChange(userrec* source, userrec* dest, chanrec* channel, std::string &parameter, bool adding)
 110 {
 111         return MODEACTION_DENY;
 112 }
 113
 114 ModePair ModeHandler::ModeSet(userrec* source, userrec* dest, chanrec* channel, const std::string &parameter)
 115 {
 116         if (dest)
 117         {
 118                 return std::make_pair(dest->IsModeSet(this->mode), "");
 119         }
 120         else
 121         {
 122                 return std::make_pair(channel->IsModeSet(this->mode), "");
 123         }
 124 }
 125
 126 void ModeHandler::DisplayList(userrec* user, chanrec* channel)
 127 {
 128 }
 129
 130 bool ModeHandler::CheckTimeStamp(time_t theirs, time_t ours, const std::string &their_param, const std::string &our_param, chanrec* channel)
 131 {
 132         return (ours < theirs);
 133 }
 134
 135 ModeWatcher::ModeWatcher(InspIRCd* Instance, char modeletter, ModeType type) : ServerInstance(Instance), mode(modeletter), m_type(type)
 136 {
 137 }
 138
 139 ModeWatcher::~ModeWatcher()
 140 {
 141 }
 142
 143 char ModeWatcher::GetModeChar()
 144 {
 145         return mode;
 146 }
 147
 148 ModeType ModeWatcher::GetModeType()
 149 {
 150         return m_type;
 151 }
 152
 153 bool ModeWatcher::BeforeMode(userrec* source, userrec* dest, chanrec* channel, std::string &parameter, bool adding, ModeType type)
 154 {
 155         return true;
 156 }
 157
 158 void ModeWatcher::AfterMode(userrec* source, userrec* dest, chanrec* channel, const std::string &parameter, bool adding, ModeType type)
 159 {
 160 }
 161
 162 userrec* ModeParser::SanityChecks(userrec *user,const char *dest,chanrec *chan,int status)
 163 {
 164         userrec *d;
 165         if ((!user) || (!dest) || (!chan) || (!*dest))
 166         {
 167                 return NULL;
 168         }
 169         d = ServerInstance->FindNick(dest);
 170         if (!d)
 171         {
 172                 user->WriteServ("401 %s %s :No such nick/channel",user->nick, dest);
 173                 return NULL;
 174         }
 175         return d;
 176 }
 177
 178 const char* ModeParser::Grant(userrec *d,chanrec *chan,int MASK)
 179 {
 180         if (!chan)
 181                 return "";
 182
 183         UCListIter n = d->chans.find(chan);
 184         if (n != d->chans.end())
 185         {
 186                 if (n->second & MASK)
 187                 {
 188                         return "";
 189                 }
 190                 n->second = n->second | MASK;
 191                 switch (MASK)
 192                 {
 193                         case UCMODE_OP:
 194                                 n->first->AddOppedUser(d);
 195                         break;
 196                         case UCMODE_HOP:
 197                                 n->first->AddHalfoppedUser(d);
 198                         break;
 199                         case UCMODE_VOICE:
 200                                 n->first->AddVoicedUser(d);
 201                         break;
 202                 }
 203                 return d->nick;
 204         }
 205         return "";
 206 }
 207
 208 const char* ModeParser::Revoke(userrec *d,chanrec *chan,int MASK)
 209 {
 210         if (!chan)
 211                 return "";
 212
 213         UCListIter n = d->chans.find(chan);
 214         if (n != d->chans.end())
 215         {
 216                 if ((n->second & MASK) == 0)
 217                 {
 218                         return "";
 219                 }
 220                 n->second ^= MASK;
 221                 switch (MASK)
 222                 {
 223                         case UCMODE_OP:
 224                                 n->first->DelOppedUser(d);
 225                         break;
 226                         case UCMODE_HOP:
 227                                 n->first->DelHalfoppedUser(d);
 228                         break;
 229                         case UCMODE_VOICE:
 230                                 n->first->DelVoicedUser(d);
 231                         break;
 232                 }
 233                 return d->nick;
 234         }
 235         return "";
 236 }
 237
 238 void ModeParser::DisplayCurrentModes(userrec *user, userrec* targetuser, chanrec* targetchannel, const char* text)
 239 {
 240         if (targetchannel)
 241         {
 242                 /* Display channel's current mode string */
 243                 user->WriteServ("324 %s %s +%s",user->nick, targetchannel->name, targetchannel->ChanModes(targetchannel->HasUser(user)));
 244                 user->WriteServ("329 %s %s %lu", user->nick, targetchannel->name, (unsigned long)targetchannel->age);
 245                 return;
 246         }
 247         else if (targetuser)
 248         {
 249                 if ((targetuser == user) || (*user->oper))
 250                 {
 251                         /* Display user's current mode string */
 252                         user->WriteServ("221 %s :+%s",targetuser->nick,targetuser->FormatModes());
 253                         if (*targetuser->oper)
 254                                 user->WriteServ("008 %s +%s :Server notice mask", targetuser->nick, targetuser->FormatNoticeMasks());
 255                         return;
 256                 }
 257                 else
 258                 {
 259                         user->WriteServ("502 %s :Can't change mode for other users", user->nick);
 260                         return;
 261                 }
 262         }
 263
 264         /* No such nick/channel */
 265         user->WriteServ("401 %s %s :No such nick/channel",user->nick, text);
 266         return;
 267 }
 268
 269 void ModeParser::Process(const char** parameters, int pcnt, userrec *user, bool servermode)
 270 {
 271         std::string target = parameters[0];
 272         ModeType type = MODETYPE_USER;
 273         unsigned char mask = 0;
 274         chanrec* targetchannel = ServerInstance->FindChan(parameters[0]);
 275         userrec* targetuser  = ServerInstance->FindNick(parameters[0]);
 276
 277         LastParse = "";
 278
 279         /* Special case for displaying the list for listmodes,
 280          * e.g. MODE #chan b, or MODE #chan +b without a parameter
 281          */
 282         if ((targetchannel) && (pcnt == 2))
 283         {
 284                 const char* mode = parameters[1];
 285
 286                 mask = MASK_CHANNEL;
 287
 288                 while (mode && *mode)
 289                 {
 290                         if (*mode == '+')
 291                         {
 292                                 mode++;
 293                                 continue;
 294                         }
 295
 296                         ModeHandler *mh = this->FindMode(*mode, MODETYPE_CHANNEL);
 297                         bool display = true;
 298
 299                         if ((mh) && (mh->IsListMode()))
 300                         {
 301                                 /** See below for a description of what craq this is :D
 302                                  */
 303                                 unsigned char handler_id = (*mode - 65) | mask;
 304
 305                                 for(ModeWatchIter watchers = modewatchers[handler_id].begin(); watchers != modewatchers[handler_id].end(); watchers++)
 306                                 {
 307                                         std::string dummyparam;
 308
 309                                         if (!((*watchers)->BeforeMode(user, NULL, targetchannel, dummyparam, true, MODETYPE_CHANNEL)))
 310                                                 display = false;
 311                                 }
 312
 313                                 if (display)
 314                                         mh->DisplayList(user, targetchannel);
 315                         }
 316
 317                         mode++;
 318                 }
 319         }
 320
 321         if (pcnt == 1)
 322         {
 323                 this->DisplayCurrentModes(user, targetuser, targetchannel, parameters[0]);
 324         }
 325         else if (pcnt > 1)
 326         {
 327                 if (targetchannel)
 328                 {
 329                         type = MODETYPE_CHANNEL;
 330                         mask = MASK_CHANNEL;
 331
 332                         /* Extra security checks on channel modes
 333                          * (e.g. are they a (half)op?
 334                          */
 335
 336                         if ((IS_LOCAL(user)) && (targetchannel->GetStatus(user) < STATUS_HOP))
 337                         {
 338                                 /* We don't have halfop */
 339                                 int MOD_RESULT = 0;
 340                                 FOREACH_RESULT(I_OnAccessCheck,OnAccessCheck(user, NULL, targetchannel, AC_GENERAL_MODE));
 341                                 if (MOD_RESULT == ACR_DENY)
 342                                         return;
 343
 344                                 if (MOD_RESULT == ACR_DEFAULT)
 345                                 {
 346                                         /* Are we a uline or is it a servermode? */
 347                                         if ((!ServerInstance->ULine(user->server)) && (!servermode))
 348                                         {
 349                                                 /* Not enough permission:
 350                                                  * NOT a uline and NOT a servermode,
 351                                                  * OR, NOT halfop or above.
 352                                                  */
 353                                                 user->WriteServ("482 %s %s :You're not a channel (half)operator",user->nick, targetchannel->name);
 354                                                 return;
 355                                         }
 356                                 }
 357                         }
 358                 }
 359                 else if (targetuser)
 360                 {
 361                         type = MODETYPE_USER;
 362                         mask = MASK_USER;
 363                         if ((user != targetuser) && (!ServerInstance->ULine(user->server)))
 364                         {
 365                                 user->WriteServ("502 %s :Can't change mode for other users", user->nick);
 366                                 return;
 367                         }
 368                 }
 369                 else
 370                 {
 371                         /* No such nick/channel */
 372                         user->WriteServ("401 %s %s :No such nick/channel",user->nick, parameters[0]);
 373                         return;
 374                 }
 375
 376                 std::string mode_sequence = parameters[1];
 377                 std::string parameter = "";
 378                 std::ostringstream parameter_list;
 379                 std::string output_sequence = "";
 380                 bool adding = true, state_change = false;
 381                 unsigned char handler_id = 0;
 382                 int parameter_counter = 2; /* Index of first parameter */
 383                 int parameter_count = 0;
 384                 bool last_successful_state_change = false;
 385
 386                 /* A mode sequence that doesnt start with + or -. Assume +. - Thanks for the suggestion spike (bug#132) */
 387                 if ((*mode_sequence.begin() != '+') && (*mode_sequence.begin() != '-'))
 388                         mode_sequence.insert(0, "+");
 389
 390                 for (std::string::const_iterator letter = mode_sequence.begin(); letter != mode_sequence.end(); letter++)
 391                 {
 392                         unsigned char modechar = *letter;
 393
 394                         switch (modechar)
 395                         {
 396                                 /* NB:
 397                                  * For + and - mode characters, we don't just stick the character into the output sequence.
 398                                  * This is because the user may do something dumb, like: +-+ooo or +oo-+. To prevent this
 399                                  * appearing in the output sequence, we store a flag which says there was a state change,
 400                                  * which is set on any + or -, however, the + or - that we finish on is only appended to
 401                                  * the output stream in the event it is followed by a non "+ or -" character, such as o or v.
 402                                  */
 403                                 case '+':
 404                                         /* The following expression prevents: +o+o nick nick, compressing it to +oo nick nick,
 405                                          * however, will allow the + if it is the first item in the sequence, regardless.
 406                                          */
 407                                         if ((!adding) || (!output_sequence.length()))
 408                                                 state_change = true;
 409                                         adding = true;
 410                                         if (!output_sequence.length())
 411                                                 last_successful_state_change = false;
 412                                         continue;
 413                                 break;
 414                                 case '-':
 415                                         if ((adding) || (!output_sequence.length()))
 416                                                 state_change = true;
 417                                         adding = false;
 418                                         if (!output_sequence.length())
 419                                                 last_successful_state_change = true;
 420                                         continue;
 421                                 break;
 422                                 default:
 423
 424                                         /**
 425                                          * Watch carefully for the sleight of hand trick.
 426                                          * 65 is the ascii value of 'A'. We take this from
 427                                          * the char we're looking at to get a number between
 428                                          * 1 and 127. We then logic-or it to get the hashed
 429                                          * position, dependent on wether its a channel or
 430                                          * a user mode. This is a little stranger, but a lot
 431                                          * faster, than using a map of pairs.
 432                                          */
 433                                         handler_id = (modechar - 65) | mask;
 434
 435                                         if (modehandlers[handler_id])
 436                                         {
 437                                                 bool abort = false;
 438
 439                                                 if (modehandlers[handler_id]->GetModeType() == type)
 440                                                 {
 441                                                         if (modehandlers[handler_id]->GetNumParams(adding))
 442                                                         {
 443                                                                 /* This mode expects a parameter, do we have any parameters left in our list to use? */
 444                                                                 if (parameter_counter < pcnt)
 445                                                                 {
 446                                                                         parameter = parameters[parameter_counter++];
 447
 448                                                                         /* Yerk, invalid! */
 449                                                                         if ((parameter.find(':') == 0) || (parameter.rfind(' ') != std::string::npos))
 450                                                                                 parameter = "";
 451                                                                 }
 452                                                                 else
 453                                                                 {
 454                                                                         /* No parameter, continue to the next mode */
 455                                                                         continue;
 456                                                                 }
 457
 458                                                                 bool had_parameter = !parameter.empty();
 459
 460                                                                 for (ModeWatchIter watchers = modewatchers[handler_id].begin(); watchers != modewatchers[handler_id].end(); watchers++)
 461                                                                 {
 462                                                                         if ((*watchers)->BeforeMode(user, targetuser, targetchannel, parameter, adding, type) == false)
 463                                                                         {
 464                                                                                 abort = true;
 465                                                                                 break;
 466                                                                         }
 467                                                                         /* A module whacked the parameter completely, and there was one. abort. */
 468                                                                         if ((had_parameter) && (parameter.empty()))
 469                                                                         {
 470                                                                                 abort = true;
 471                                                                                 break;
 472                                                                         }
 473                                                                 }
 474
 475                                                                 if (abort)
 476                                                                         continue;
 477                                                         }
 478
 479                                                         /* It's an oper only mode, check if theyre an oper. If they arent,
 480                                                          * eat any parameter that  came with the mode, and continue to next
 481                                                          */
 482                                                         if ((IS_LOCAL(user)) && (modehandlers[handler_id]->NeedsOper()) && (!*user->oper))
 483                                                         {
 484                                                                 user->WriteServ("481 %s :Permission Denied- Only IRC operators may %sset %s mode %c", user->nick,
 485                                                                                 adding ? "" : "un", type == MODETYPE_CHANNEL ? "channel" : "user",
 486                                                                                 modehandlers[handler_id]->GetModeChar());
 487                                                                 continue;
 488                                                         }
 489
 490                                                         /* Call the handler for the mode */
 491                                                         ModeAction ma = modehandlers[handler_id]->OnModeChange(user, targetuser, targetchannel, parameter, adding);
 492
 493                                                         if ((modehandlers[handler_id]->GetNumParams(adding)) && (parameter == ""))
 494                                                         {
 495                                                                 /* The handler nuked the parameter and they are supposed to have one.
 496                                                                  * We CANT continue now, even if they actually returned MODEACTION_ALLOW,
 497                                                                  * so we bail to the next mode character.
 498                                                                  */
 499                                                                 continue;
 500                                                         }
 501
 502                                                         if (ma == MODEACTION_ALLOW)
 503                                                         {
 504                                                                 /* We're about to output a valid mode letter - was there previously a pending state-change? */
 505                                                                 if (state_change)
 506                                                                 {
 507                                                                         if (adding != last_successful_state_change)
 508                                                                                 output_sequence.append(adding ? "+" : "-");
 509                                                                         last_successful_state_change = adding;
 510                                                                 }
 511
 512                                                                 /* Add the mode letter */
 513                                                                 output_sequence.push_back(modechar);
 514
 515                                                                 /* Is there a valid parameter for this mode? If so add it to the parameter list */
 516                                                                 if ((modehandlers[handler_id]->GetNumParams(adding)) && (parameter != ""))
 517                                                                 {
 518                                                                         parameter_list << " " << parameter;
 519                                                                         parameter_count++;
 520                                                                         /* Does this mode have a prefix? */
 521                                                                         if (modehandlers[handler_id]->GetPrefix() && targetchannel)
 522                                                                         {
 523                                                                                 userrec* user_to_prefix = ServerInstance->FindNick(parameter);
 524                                                                                 if (user_to_prefix)
 525                                                                                         targetchannel->SetPrefix(user_to_prefix, modehandlers[handler_id]->GetPrefix(),
 526                                                                                                         modehandlers[handler_id]->GetPrefixRank(), adding);
 527                                                                         }
 528                                                                 }
 529
 530                                                                 /* Call all the AfterMode events in the mode watchers for this mode */
 531                                                                 for (ModeWatchIter watchers = modewatchers[handler_id].begin(); watchers != modewatchers[handler_id].end(); watchers++)
 532                                                                         (*watchers)->AfterMode(user, targetuser, targetchannel, parameter, adding, type);
 533
 534                                                                 /* Reset the state change flag */
 535                                                                 state_change = false;
 536
 537                                                                 if ((output_sequence.length() + parameter_list.str().length() > 450) || (output_sequence.length() > 100)
 538                                                                                 || (parameter_count > MAXMODES))
 539                                                                 {
 540                                                                         /* We cant have a mode sequence this long */
 541                                                                         letter = mode_sequence.end() - 1;
 542                                                                         continue;
 543                                                                 }
 544                                                         }
 545                                                 }
 546                                         }
 547                                         else
 548                                         {
 549                                                 /* No mode handler? Unknown mode character then. */
 550                                                 user->WriteServ("472 %s %c :is unknown mode char to me",user->nick, modechar);
 551                                         }
 552                                 break;
 553                         }
 554                 }
 555                 /* Was there at least one valid mode in the sequence? */
 556                 if (output_sequence != "")
 557                 {
 558                         if (servermode)
 559                         {
 560                                 if (type == MODETYPE_CHANNEL)
 561                                 {
 562                                         targetchannel->WriteChannelWithServ(ServerInstance->Config->ServerName, "MODE %s %s%s", targetchannel->name, output_sequence.c_str(), parameter_list.str().c_str());
 563                                         this->LastParse = targetchannel->name;
 564                                 }
 565                                 else
 566                                 {
 567                                         targetuser->WriteServ("MODE %s %s%s",targetuser->nick,output_sequence.c_str(), parameter_list.str().c_str());
 568                                         this->LastParse = targetuser->nick;
 569                                 }
 570                         }
 571                         else
 572                         {
 573                                 if (type == MODETYPE_CHANNEL)
 574                                 {
 575                                         targetchannel->WriteChannel(user,"MODE %s %s%s",targetchannel->name,output_sequence.c_str(),parameter_list.str().c_str());
 576                                         FOREACH_MOD(I_OnMode,OnMode(user, targetchannel, TYPE_CHANNEL, output_sequence + parameter_list.str()));
 577                                         this->LastParse = targetchannel->name;
 578                                 }
 579                                 else
 580                                 {
 581                                         user->WriteTo(targetuser,"MODE %s %s%s",targetuser->nick,output_sequence.c_str(), parameter_list.str().c_str());
 582                                         FOREACH_MOD(I_OnMode,OnMode(user, targetuser, TYPE_USER, output_sequence + parameter_list.str()));
 583                                         this->LastParse = targetuser->nick;
 584                                 }
 585                         }
 586
 587                         LastParse.append(" ");
 588                         LastParse.append(output_sequence);
 589                         LastParse.append(parameter_list.str());
 590                 }
 591         }
 592 }
 593
 594 const std::string& ModeParser::GetLastParse()
 595 {
 596         return LastParse;
 597 }
 598
 599 void ModeParser::CleanMask(std::string &mask)
 600 {
 601         std::string::size_type pos_of_pling = mask.find_first_of('!');
 602         std::string::size_type pos_of_at = mask.find_first_of('@');
 603         std::string::size_type pos_of_dot = mask.find_first_of('.');
 604         std::string::size_type pos_of_colon = mask.find_first_of(':'); /* Because ipv6 addresses are colon delimited */
 605
 606         if ((pos_of_pling == std::string::npos) && (pos_of_at == std::string::npos))
 607         {
 608                 /* Just a nick, or just a host */
 609                 if ((pos_of_dot == std::string::npos) && (pos_of_colon == std::string::npos))
 610                 {
 611                         /* It has no '.' in it, it must be a nick. */
 612                         mask.append("!*@*");
 613                 }
 614                 else
 615                 {
 616                         /* Got a dot in it? Has to be a host */
 617                         mask = "*!*@" + mask;
 618                 }
 619         }
 620         else if ((pos_of_pling == std::string::npos) && (pos_of_at != std::string::npos))
 621         {
 622                 /* Has an @ but no !, its a user@host */
 623                  mask = "*!" + mask;
 624         }
 625         else if ((pos_of_pling != std::string::npos) && (pos_of_at == std::string::npos))
 626         {
 627                 /* Has a ! but no @, it must be a nick!ident */
 628                 mask.append("@*");
 629         }
 630 }
 631
 632 bool ModeParser::AddMode(ModeHandler* mh, unsigned const char modeletter)
 633 {
 634         unsigned char mask = 0;
 635         unsigned char pos = 0;
 636
 637         /* Yes, i know, this might let people declare modes like '_' or '^'.
 638          * If they do that, thats their problem, and if i ever EVER see an
 639          * official InspIRCd developer do that, i'll beat them with a paddle!
 640          */
 641         if ((mh->GetModeChar() < 'A') || (mh->GetModeChar() > 'z'))
 642                 return false;
 643
 644         /* A mode prefix of ',' is not acceptable, it would fuck up server to server.
 645          * A mode prefix of ':' will fuck up both server to server, and client to server.
 646          * A mode prefix of '#' will mess up /whois and /privmsg
 647          */
 648         if ((mh->GetPrefix() == ',') || (mh->GetPrefix() == ':') || (mh->GetPrefix() == '#'))
 649                 return false;
 650
 651         mh->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
 652         pos = (mh->GetModeChar()-65) | mask;
 653
 654         if (modehandlers[pos])
 655                 return false;
 656
 657         modehandlers[pos] = mh;
 658         return true;
 659 }
 660
 661 bool ModeParser::DelMode(ModeHandler* mh)
 662 {
 663         unsigned char mask = 0;
 664         unsigned char pos = 0;
 665
 666         if ((mh->GetModeChar() < 'A') || (mh->GetModeChar() > 'z'))
 667                 return false;
 668
 669         mh->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
 670         pos = (mh->GetModeChar()-65) | mask;
 671
 672         if (!modehandlers[pos])
 673                 return false;
 674
 675         switch (mh->GetModeType())
 676         {
 677                 case MODETYPE_USER:
 678                         for (user_hash::iterator i = ServerInstance->clientlist->begin(); i != ServerInstance->clientlist->end(); i++)
 679                         {
 680                                 mh->RemoveMode(i->second);
 681                         }
 682                 break;
 683                 case MODETYPE_CHANNEL:
 684                         for (chan_hash::iterator i = ServerInstance->chanlist->begin(); i != ServerInstance->chanlist->end(); i++)
 685                         {
 686                                 mh->RemoveMode(i->second);
 687                         }
 688                 break;
 689         }
 690
 691         modehandlers[pos] = NULL;
 692
 693         return true;
 694 }
 695
 696 ModeHandler* ModeParser::FindMode(unsigned const char modeletter, ModeType mt)
 697 {
 698         unsigned char mask = 0;
 699         unsigned char pos = 0;
 700
 701         if ((modeletter < 'A') || (modeletter > 'z'))
 702                 return NULL;
 703
 704         mt == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
 705         pos = (modeletter-65) | mask;
 706
 707         return modehandlers[pos];
 708 }
 709
 710 std::string ModeParser::UserModeList()
 711 {
 712         char modestr[256];
 713         int pointer = 0;
 714
 715         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 716         {
 717                 unsigned char pos = (mode-65) | MASK_USER;
 718
 719                 if (modehandlers[pos])
 720                         modestr[pointer++] = mode;
 721         }
 722         modestr[pointer++] = 0;
 723         return modestr;
 724 }
 725
 726 std::string ModeParser::ChannelModeList()
 727 {
 728         char modestr[256];
 729         int pointer = 0;
 730
 731         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 732         {
 733                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 734
 735                 if (modehandlers[pos])
 736                         modestr[pointer++] = mode;
 737         }
 738         modestr[pointer++] = 0;
 739         return modestr;
 740 }
 741
 742 std::string ModeParser::ParaModeList()
 743 {
 744         char modestr[256];
 745         int pointer = 0;
 746
 747         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 748         {
 749                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 750
 751                 if ((modehandlers[pos]) && (modehandlers[pos]->GetNumParams(true)))
 752                         modestr[pointer++] = mode;
 753         }
 754         modestr[pointer++] = 0;
 755         return modestr;
 756 }
 757
 758 ModeHandler* ModeParser::FindPrefix(unsigned const char pfxletter)
 759 {
 760         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 761         {
 762                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 763
 764                 if ((modehandlers[pos]) && (modehandlers[pos]->GetPrefix() == pfxletter))
 765                 {
 766                         return modehandlers[pos];
 767                 }
 768         }
 769         return NULL;
 770 }
 771
 772 std::string ModeParser::ModeString(userrec* user, chanrec* channel)
 773 {
 774         std::string types;
 775         std::string pars;
 776
 777         if (!channel || !user)
 778                 return "";
 779
 780         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 781         {
 782                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 783                 ModeHandler* mh = modehandlers[pos];
 784                 if ((mh) && (mh->GetNumParams(true)) && (mh->GetNumParams(false)))
 785                 {
 786                         ModePair ret;
 787                         ret = mh->ModeSet(NULL, user, channel, user->nick);
 788                         if ((ret.first) && (ret.second == user->nick))
 789                         {
 790                                 pars.append(" ");
 791                                 pars.append(user->nick);
 792                                 types.push_back(mh->GetModeChar());
 793                         }
 794                 }
 795         }
 796
 797         return types+pars;
 798 }
 799
 800 std::string ModeParser::ChanModes()
 801 {
 802         std::string type1;      /* Listmodes EXCEPT those with a prefix */
 803         std::string type2;      /* Modes that take a param when adding or removing */
 804         std::string type3;      /* Modes that only take a param when adding */
 805         std::string type4;      /* Modes that dont take a param */
 806
 807         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 808         {
 809                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 810                  /* One parameter when adding */
 811                 if (modehandlers[pos])
 812                 {
 813                         if (modehandlers[pos]->GetNumParams(true))
 814                         {
 815                                 if ((modehandlers[pos]->IsListMode()) && (!modehandlers[pos]->GetPrefix()))
 816                                 {
 817                                         type1 += modehandlers[pos]->GetModeChar();
 818                                 }
 819                                 else
 820                                 {
 821                                         /* ... and one parameter when removing */
 822                                         if (modehandlers[pos]->GetNumParams(false))
 823                                         {
 824                                                 /* But not a list mode */
 825                                                 if (!modehandlers[pos]->GetPrefix())
 826                                                 {
 827                                                         type2 += modehandlers[pos]->GetModeChar();
 828                                                 }
 829                                         }
 830                                         else
 831                                         {
 832                                                 /* No parameters when removing */
 833                                                 type3 += modehandlers[pos]->GetModeChar();
 834                                         }
 835                                 }
 836                         }
 837                         else
 838                         {
 839                                 type4 += modehandlers[pos]->GetModeChar();
 840                         }
 841                 }
 842
 843         }
 844
 845         return type1 + "," + type2 + "," + type3 + "," + type4;
 846 }
 847
 848 bool ModeParser::PrefixComparison(const prefixtype one, const prefixtype two)
 849 {
 850         return one.second > two.second;
 851 }
 852
 853 std::string ModeParser::BuildPrefixes()
 854 {
 855         std::string mletters = "";
 856         std::string mprefixes = "";
 857         pfxcontainer pfx;
 858         std::map<char,char> prefix_to_mode;
 859
 860         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 861         {
 862                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 863
 864                 if ((modehandlers[pos]) && (modehandlers[pos]->GetPrefix()))
 865                 {
 866                         pfx.push_back(std::make_pair<char,unsigned int>(modehandlers[pos]->GetPrefix(), modehandlers[pos]->GetPrefixRank()));
 867                         prefix_to_mode[modehandlers[pos]->GetPrefix()] = modehandlers[pos]->GetModeChar();
 868                 }
 869         }
 870
 871         sort(pfx.begin(), pfx.end(), ModeParser::PrefixComparison);
 872
 873         for (pfxcontainer::iterator n = pfx.begin(); n != pfx.end(); n++)
 874         {
 875                 mletters = mletters + n->first;
 876                 mprefixes = mprefixes + prefix_to_mode.find(n->first)->second;
 877         }
 878
 879         return "(" + mprefixes + ")" + mletters;
 880 }
 881
 882 bool ModeParser::AddModeWatcher(ModeWatcher* mw)
 883 {
 884         unsigned char mask = 0;
 885         unsigned char pos = 0;
 886
 887         if (!mw)
 888                 return false;
 889
 890         if ((mw->GetModeChar() < 'A') || (mw->GetModeChar() > 'z'))
 891                 return false;
 892
 893         mw->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
 894         pos = (mw->GetModeChar()-65) | mask;
 895
 896         modewatchers[pos].push_back(mw);
 897         return true;
 898 }
 899
 900 bool ModeParser::DelModeWatcher(ModeWatcher* mw)
 901 {
 902         unsigned char mask = 0;
 903         unsigned char pos = 0;
 904
 905         if (!mw)
 906                 return false;
 907
 908         if ((mw->GetModeChar() < 'A') || (mw->GetModeChar() > 'z'))
 909                 return false;
 910
 911         mw->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
 912         pos = (mw->GetModeChar()-65) | mask;
 913
 914         ModeWatchIter a = find(modewatchers[pos].begin(),modewatchers[pos].end(),mw);
 915
 916         if (a == modewatchers[pos].end())
 917         {
 918                 return false;
 919         }
 920
 921         modewatchers[pos].erase(a);
 922
 923         return true;
 924 }
 925
 926 /** This default implementation can remove simple user modes
 927  */
 928 void ModeHandler::RemoveMode(userrec* user)
 929 {
 930         char moderemove[MAXBUF];
 931         const char* parameters[] = { user->nick, moderemove };
 932
 933         if (user->IsModeSet(this->GetModeChar()))
 934         {
 935                 sprintf(moderemove,"-%c",this->GetModeChar());
 936                 ServerInstance->Parser->CallHandler("MODE", parameters, 2, user);
 937         }
 938 }
 939
 940 /** This default implementation can remove simple channel modes
 941  * (no parameters)
 942  */
 943 void ModeHandler::RemoveMode(chanrec* channel)
 944 {
 945         char moderemove[MAXBUF];
 946         const char* parameters[] = { channel->name, moderemove };
 947
 948         if (channel->IsModeSet(this->GetModeChar()))
 949         {
 950                 userrec* n = new userrec(ServerInstance);
 951
 952                 sprintf(moderemove,"-%c",this->GetModeChar());
 953                 n->SetFd(FD_MAGIC_NUMBER);
 954
 955                 ServerInstance->SendMode(parameters, 2, n);
 956
 957                 delete n;
 958         }
 959 }
 960
 961 ModeParser::ModeParser(InspIRCd* Instance) : ServerInstance(Instance)
 962 {
 963         /* Clear mode list */
 964         memset(modehandlers, 0, sizeof(modehandlers));
 965         memset(modewatchers, 0, sizeof(modewatchers));
 966
 967         /* Last parse string */
 968         LastParse = "";
 969
 970         /* Initialise the RFC mode letters */
 971
 972         /* Start with channel simple modes, no params */
 973         this->AddMode(new ModeChannelSecret(Instance), 's');
 974         this->AddMode(new ModeChannelPrivate(Instance), 'p');
 975         this->AddMode(new ModeChannelModerated(Instance), 'm');
 976         this->AddMode(new ModeChannelTopicOps(Instance), 't');
 977         this->AddMode(new ModeChannelNoExternal(Instance), 'n');
 978         this->AddMode(new ModeChannelInviteOnly(Instance), 'i');
 979
 980         /* Cannel modes with params */
 981         this->AddMode(new ModeChannelKey(Instance), 'k');
 982         this->AddMode(new ModeChannelLimit(Instance), 'l');
 983
 984         /* Channel listmodes */
 985         this->AddMode(new ModeChannelBan(Instance), 'b');
 986         this->AddMode(new ModeChannelOp(Instance), 'o');
 987         this->AddMode(new ModeChannelHalfOp(Instance), 'h');
 988         this->AddMode(new ModeChannelVoice(Instance), 'v');
 989
 990         /* Now for usermodes */
 991         this->AddMode(new ModeUserServerNotice(Instance), 's');
 992         this->AddMode(new ModeUserWallops(Instance), 'w');
 993         this->AddMode(new ModeUserInvisible(Instance), 'i');
 994         this->AddMode(new ModeUserOperator(Instance), 'o');
 995         this->AddMode(new ModeUserServerNoticeMask(Instance), 'n');
 996 }