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