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