src/mode.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
   6  *                       E-mail:
   7  *              <brain@chatspike.net>
   8  *                <Craig@chatspike.net>
   9  *
  10  * Written by Craig Edwards, Craig McLure, and others.
  11  * This program is free but copyrighted software; see
  12  *          the file COPYING for details.
  13  *
  14  * ---------------------------------------------------
  15  */
  16
  17 using namespace std;
  18
  19 #include "inspircd.h"
  20 #include "users.h"
  21 #include "modules.h"
  22 #include "inspstring.h"
  23 #include "mode.h"
  24
  25 /* +s (secret) */
  26 #include "modes/cmode_s.h"
  27 /* +p (private) */
  28 #include "modes/cmode_p.h"
  29 /* +b (bans) */
  30 #include "modes/cmode_b.h"
  31 /* +m (moderated) */
  32 #include "modes/cmode_m.h"
  33 /* +t (only (half) ops can change topic) */
  34 #include "modes/cmode_t.h"
  35 /* +n (no external messages) */
  36 #include "modes/cmode_n.h"
  37 /* +i (invite only) */
  38 #include "modes/cmode_i.h"
  39 /* +k (keyed channel) */
  40 #include "modes/cmode_k.h"
  41 /* +l (channel user limit) */
  42 #include "modes/cmode_l.h"
  43 /* +o (channel op) */
  44 #include "modes/cmode_o.h"
  45 /* +h (channel halfop) */
  46 #include "modes/cmode_h.h"
  47 /* +v (channel voice) */
  48 #include "modes/cmode_v.h"
  49 /* +s (server notices) */
  50 #include "modes/umode_s.h"
  51 /* +w (see wallops) */
  52 #include "modes/umode_w.h"
  53 /* +i (invisible) */
  54 #include "modes/umode_i.h"
  55 /* +o (operator) */
  56 #include "modes/umode_o.h"
  57 /* +n (notice mask - our implementation of snomasks) */
  58 #include "modes/umode_n.h"
  59
  60 ModeHandler::ModeHandler(InspIRCd* Instance, char modeletter, int parameters_on, int parameters_off, bool listmode, ModeType type, bool operonly, char mprefix)
  61         : ServerInstance(Instance), mode(modeletter), n_params_on(parameters_on), n_params_off(parameters_off), list(listmode), m_type(type), oper(operonly), prefix(mprefix)
  62 {
  63 }
  64
  65 ModeHandler::~ModeHandler()
  66 {
  67 }
  68
  69 bool ModeHandler::IsListMode()
  70 {
  71         return list;
  72 }
  73
  74 unsigned int ModeHandler::GetPrefixRank()
  75 {
  76         return 0;
  77 }
  78
  79 ModeType ModeHandler::GetModeType()
  80 {
  81         return m_type;
  82 }
  83
  84 bool ModeHandler::NeedsOper()
  85 {
  86         return oper;
  87 }
  88
  89 char ModeHandler::GetPrefix()
  90 {
  91         return prefix;
  92 }
  93
  94 int ModeHandler::GetNumParams(bool adding)
  95 {
  96         return adding ? n_params_on : n_params_off;
  97 }
  98
  99 char ModeHandler::GetModeChar()
 100 {
 101         return mode;
 102 }
 103
 104 ModeAction ModeHandler::OnModeChange(userrec* source, userrec* dest, chanrec* channel, std::string &parameter, bool adding)
 105 {
 106         return MODEACTION_DENY;
 107 }
 108
 109 ModePair ModeHandler::ModeSet(userrec* source, userrec* dest, chanrec* channel, const std::string &parameter)
 110 {
 111         if (dest)
 112         {
 113                 return std::make_pair(dest->IsModeSet(this->mode), "");
 114         }
 115         else
 116         {
 117                 return std::make_pair(channel->IsModeSet(this->mode), "");
 118         }
 119 }
 120
 121 void ModeHandler::DisplayList(userrec* user, chanrec* channel)
 122 {
 123 }
 124
 125 bool ModeHandler::CheckTimeStamp(time_t theirs, time_t ours, const std::string &their_param, const std::string &our_param, chanrec* channel)
 126 {
 127         return (ours < theirs);
 128 }
 129
 130 ModeWatcher::ModeWatcher(InspIRCd* Instance, char modeletter, ModeType type) : ServerInstance(Instance), mode(modeletter), m_type(type)
 131 {
 132 }
 133
 134 ModeWatcher::~ModeWatcher()
 135 {
 136 }
 137
 138 char ModeWatcher::GetModeChar()
 139 {
 140         return mode;
 141 }
 142
 143 ModeType ModeWatcher::GetModeType()
 144 {
 145         return m_type;
 146 }
 147
 148 bool ModeWatcher::BeforeMode(userrec* source, userrec* dest, chanrec* channel, std::string &parameter, bool adding, ModeType type)
 149 {
 150         return true;
 151 }
 152
 153 void ModeWatcher::AfterMode(userrec* source, userrec* dest, chanrec* channel, const std::string &parameter, bool adding, ModeType type)
 154 {
 155 }
 156
 157 userrec* ModeParser::SanityChecks(userrec *user,const char *dest,chanrec *chan,int status)
 158 {
 159         userrec *d;
 160         if ((!user) || (!dest) || (!chan) || (!*dest))
 161         {
 162                 return NULL;
 163         }
 164         d = ServerInstance->FindNick(dest);
 165         if (!d)
 166         {
 167                 user->WriteServ("401 %s %s :No such nick/channel",user->nick, dest);
 168                 return NULL;
 169         }
 170         return d;
 171 }
 172
 173 const char* ModeParser::Grant(userrec *d,chanrec *chan,int MASK)
 174 {
 175         if (!chan)
 176                 return "";
 177
 178         for (std::vector<ucrec*>::const_iterator i = d->chans.begin(); i != d->chans.end(); i++)
 179         {
 180                 ucrec* n = (ucrec*)(*i);
 181                 if (n->channel == chan)
 182                 {
 183                         if (n->uc_modes & MASK)
 184                         {
 185                                 return "";
 186                         }
 187                         n->uc_modes = n->uc_modes | MASK;
 188                         switch (MASK)
 189                         {
 190                                 case UCMODE_OP:
 191                                         n->channel->AddOppedUser(d);
 192                                 break;
 193                                 case UCMODE_HOP:
 194                                         n->channel->AddHalfoppedUser(d);
 195                                 break;
 196                                 case UCMODE_VOICE:
 197                                         n->channel->AddVoicedUser(d);
 198                                 break;
 199                         }
 200                         ServerInstance->Log(DEBUG,"grant: %s %s",n->channel->name,d->nick);
 201                         return d->nick;
 202                 }
 203         }
 204         return "";
 205 }
 206
 207 const char* ModeParser::Revoke(userrec *d,chanrec *chan,int MASK)
 208 {
 209         if (!chan)
 210                 return "";
 211
 212         for (std::vector<ucrec*>::const_iterator i = d->chans.begin(); i != d->chans.end(); i++)
 213         {
 214                 ucrec* n = (ucrec*)(*i);
 215                 if (n->channel == chan)
 216                 {
 217                         if ((n->uc_modes & MASK) == 0)
 218                         {
 219                                 return "";
 220                         }
 221                         n->uc_modes ^= MASK;
 222                         switch (MASK)
 223                         {
 224                                 case UCMODE_OP:
 225                                         n->channel->DelOppedUser(d);
 226                                 break;
 227                                 case UCMODE_HOP:
 228                                         n->channel->DelHalfoppedUser(d);
 229                                 break;
 230                                 case UCMODE_VOICE:
 231                                         n->channel->DelVoicedUser(d);
 232                                 break;
 233                         }
 234                         ServerInstance->Log(DEBUG,"revoke: %s %s",n->channel->name,d->nick);
 235                         return d->nick;
 236                 }
 237         }
 238         return "";
 239 }
 240
 241 void ModeParser::DisplayCurrentModes(userrec *user, userrec* targetuser, chanrec* targetchannel, const char* text)
 242 {
 243         if (targetchannel)
 244         {
 245                 /* Display channel's current mode string */
 246                 user->WriteServ("324 %s %s +%s",user->nick, targetchannel->name, targetchannel->ChanModes(targetchannel->HasUser(user)));
 247                 user->WriteServ("329 %s %s %d", user->nick, targetchannel->name, targetchannel->created);
 248                 return;
 249         }
 250         else if (targetuser)
 251         {
 252                 /* Display user's current mode string */
 253                 user->WriteServ("221 %s :+%s",targetuser->nick,targetuser->FormatModes());
 254                 if (*targetuser->oper)
 255                         user->WriteServ("008 %s +%s :Server notice mask", targetuser->nick, targetuser->FormatNoticeMasks());
 256                 return;
 257         }
 258
 259         /* No such nick/channel */
 260         user->WriteServ("401 %s %s :No such nick/channel",user->nick, text);
 261         return;
 262 }
 263
 264 void ModeParser::Process(const char** parameters, int pcnt, userrec *user, bool servermode)
 265 {
 266         std::string target = parameters[0];
 267         ModeType type = MODETYPE_USER;
 268         unsigned char mask = 0;
 269         chanrec* targetchannel = ServerInstance->FindChan(parameters[0]);
 270         userrec* targetuser  = ServerInstance->FindNick(parameters[0]);
 271
 272         ServerInstance->Log(DEBUG,"ModeParser::Process start: pcnt=%d",pcnt);
 273         for (int j = 0; j < pcnt; j++)
 274                 ServerInstance->Log(DEBUG,"    parameters[%d] = '%s'", j, parameters[j]);
 275
 276         LastParse = "";
 277
 278         /* Special case for displaying the list for listmodes,
 279          * e.g. MODE #chan b, or MODE #chan +b without a parameter
 280          */
 281         if ((targetchannel) && (pcnt == 2))
 282         {
 283                 ServerInstance->Log(DEBUG,"Spool list");
 284                 const char* mode = parameters[1];
 285                 if (*mode == '+')
 286                         mode++;
 287                 unsigned char handler_id = ((*mode) - 65) | MASK_CHANNEL;
 288                 ModeHandler* mh = modehandlers[handler_id];
 289                 if ((mh) && (mh->IsListMode()))
 290                 {
 291                         mh->DisplayList(user, targetchannel);
 292                         return;
 293                 }
 294         }
 295
 296         if (pcnt == 1)
 297         {
 298                 ServerInstance->Log(DEBUG,"Mode list request");
 299                 this->DisplayCurrentModes(user, targetuser, targetchannel, parameters[0]);
 300         }
 301         else if (pcnt > 1)
 302         {
 303                 ServerInstance->Log(DEBUG,"More than one parameter");
 304
 305                 if (targetchannel)
 306                 {
 307                         type = MODETYPE_CHANNEL;
 308                         mask = MASK_CHANNEL;
 309
 310                         /* Extra security checks on channel modes
 311                          * (e.g. are they a (half)op?
 312                          */
 313
 314                         if ((IS_LOCAL(user)) && (targetchannel->GetStatus(user) < STATUS_HOP))
 315                         {
 316                                 /* We don't have halfop */
 317                                 ServerInstance->Log(DEBUG,"The user is not a halfop or above, checking other reasons for being able to set the modes");
 318
 319                                 int MOD_RESULT = 0;
 320                                 FOREACH_RESULT(I_OnAccessCheck,OnAccessCheck(user, NULL, targetchannel, AC_GENERAL_MODE));
 321                                 if (MOD_RESULT == ACR_DENY)
 322                                         return;
 323
 324                                 if (MOD_RESULT == ACR_DEFAULT)
 325                                 {
 326                                         /* Are we a uline or is it a servermode? */
 327                                         if ((!ServerInstance->ULine(user->server)) && (!servermode))
 328                                         {
 329                                                 /* Not enough permission:
 330                                                  * NOT a uline and NOT a servermode,
 331                                                  * OR, NOT halfop or above.
 332                                                  */
 333                                                 user->WriteServ("482 %s %s :You're not a channel (half)operator",user->nick, targetchannel->name);
 334                                                 return;
 335                                         }
 336                                 }
 337                         }
 338                 }
 339                 else if (targetuser)
 340                 {
 341                         type = MODETYPE_USER;
 342                         mask = MASK_USER;
 343                 }
 344                 else
 345                 {
 346                         /* No such nick/channel */
 347                         user->WriteServ("401 %s %s :No such nick/channel",user->nick, parameters[0]);
 348                         return;
 349                 }
 350
 351                 std::string mode_sequence = parameters[1];
 352                 std::string parameter = "";
 353                 std::ostringstream parameter_list;
 354                 std::string output_sequence = "";
 355                 bool adding = true, state_change = false;
 356                 unsigned char handler_id = 0;
 357                 int parameter_counter = 2; /* Index of first parameter */
 358                 int parameter_count = 0;
 359
 360                 /* A mode sequence that doesnt start with + or -. Assume +. - Thanks for the suggestion spike (bug#132) */
 361                 if ((*mode_sequence.begin() != '+') && (*mode_sequence.begin() != '-'))
 362                         mode_sequence.insert(0, "+");
 363
 364                 for (std::string::const_iterator letter = mode_sequence.begin(); letter != mode_sequence.end(); letter++)
 365                 {
 366                         unsigned char modechar = *letter;
 367
 368                         ServerInstance->Log(DEBUG,"Process letter %c", modechar);
 369
 370                         switch (modechar)
 371                         {
 372                                 /* NB:
 373                                  * For + and - mode characters, we don't just stick the character into the output sequence.
 374                                  * This is because the user may do something dumb, like: +-+ooo or +oo-+. To prevent this
 375                                  * appearing in the output sequence, we store a flag which says there was a state change,
 376                                  * which is set on any + or -, however, the + or - that we finish on is only appended to
 377                                  * the output stream in the event it is followed by a non "+ or -" character, such as o or v.
 378                                  */
 379                                 case '+':
 380                                         /* The following expression prevents: +o+o nick nick, compressing it to +oo nick nick,
 381                                          * however, will allow the + if it is the first item in the sequence, regardless.
 382                                          */
 383                                         if ((!adding) || (!output_sequence.length()))
 384                                                 state_change = true;
 385                                         adding = true;
 386                                         continue;
 387                                 break;
 388                                 case '-':
 389                                         if ((adding) || (!output_sequence.length()))
 390                                                 state_change = true;
 391                                         adding = false;
 392                                         continue;
 393                                 break;
 394                                 default:
 395
 396                                         /**
 397                                          * Watch carefully for the sleight of hand trick.
 398                                          * 65 is the ascii value of 'A'. We take this from
 399                                          * the char we're looking at to get a number between
 400                                          * 1 and 127. We then logic-or it to get the hashed
 401                                          * position, dependent on wether its a channel or
 402                                          * a user mode. This is a little stranger, but a lot
 403                                          * faster, than using a map of pairs.
 404                                          */
 405                                         handler_id = (modechar - 65) | mask;
 406
 407                                         if (modehandlers[handler_id])
 408                                         {
 409                                                 bool abort = false;
 410
 411                                                 for (ModeWatchIter watchers = modewatchers[handler_id].begin(); watchers != modewatchers[handler_id].end(); watchers++)
 412                                                 {
 413                                                         if ((*watchers)->BeforeMode(user, targetuser, targetchannel, parameter, adding, type) == MODEACTION_DENY)
 414                                                                 abort = true;
 415                                                 }
 416                                                 if ((modehandlers[handler_id]->GetModeType() == type) && (!abort))
 417                                                 {
 418                                                         if (modehandlers[handler_id]->GetNumParams(adding))
 419                                                         {
 420                                                                 /* This mode expects a parameter, do we have any parameters left in our list to use? */
 421                                                                 if (parameter_counter < pcnt)
 422                                                                 {
 423                                                                         ServerInstance->Log(DEBUG,"parameter_counter = %d, pcnt = %d", parameter_counter, pcnt);
 424                                                                         parameter = parameters[parameter_counter++];
 425
 426                                                                         /* Yerk, invalid! */
 427                                                                         if ((parameter.find(':') == 0) || (parameter.rfind(' ') != std::string::npos))
 428                                                                                 parameter = "";
 429                                                                 }
 430                                                                 else
 431                                                                 {
 432                                                                         /* No parameter, continue to the next mode */
 433                                                                         continue;
 434                                                                 }
 435                                                         }
 436
 437                                                         /* It's an oper only mode, check if theyre an oper. If they arent,
 438                                                          * eat any parameter that  came with the mode, and continue to next
 439                                                          */
 440                                                         if ((IS_LOCAL(user)) && (modehandlers[handler_id]->NeedsOper()) && (!*user->oper))
 441                                                         {
 442                                                                 user->WriteServ("481 %s :Permission Denied- Only IRC operators may %sset %s mode %c", user->nick,
 443                                                                                 adding ? "" : "un", type == MODETYPE_CHANNEL ? "channel" : "user",
 444                                                                                 modehandlers[handler_id]->GetModeChar());
 445                                                                 continue;
 446                                                         }
 447
 448                                                         /* Call the handler for the mode */
 449                                                         ModeAction ma = modehandlers[handler_id]->OnModeChange(user, targetuser, targetchannel, parameter, adding);
 450
 451                                                         if ((modehandlers[handler_id]->GetNumParams(adding)) && (parameter == ""))
 452                                                         {
 453                                                                 /* The handler nuked the parameter and they are supposed to have one.
 454                                                                  * We CANT continue now, even if they actually returned MODEACTION_ALLOW,
 455                                                                  * so we bail to the next mode character.
 456                                                                  */
 457                                                                 continue;
 458                                                         }
 459
 460                                                         if (ma == MODEACTION_ALLOW)
 461                                                         {
 462                                                                 /* We're about to output a valid mode letter - was there previously a pending state-change? */
 463                                                                 if (state_change)
 464                                                                         output_sequence.append(adding ? "+" : "-");
 465
 466                                                                 /* Add the mode letter */
 467                                                                 output_sequence.push_back(modechar);
 468
 469                                                                 /* Is there a valid parameter for this mode? If so add it to the parameter list */
 470                                                                 if ((modehandlers[handler_id]->GetNumParams(adding)) && (parameter != ""))
 471                                                                 {
 472                                                                         parameter_list << " " << parameter;
 473                                                                         parameter_count++;
 474                                                                         /* Does this mode have a prefix? */
 475                                                                         if (modehandlers[handler_id]->GetPrefix() && targetchannel)
 476                                                                         {
 477                                                                                 userrec* user_to_prefix = ServerInstance->FindNick(parameter);
 478                                                                                 if (user_to_prefix)
 479                                                                                         targetchannel->SetPrefix(user_to_prefix, modehandlers[handler_id]->GetPrefix(),
 480                                                                                                         modehandlers[handler_id]->GetPrefixRank(), adding);
 481                                                                         }
 482                                                                 }
 483
 484                                                                 /* Call all the AfterMode events in the mode watchers for this mode */
 485                                                                 for (ModeWatchIter watchers = modewatchers[handler_id].begin(); watchers != modewatchers[handler_id].end(); watchers++)
 486                                                                         (*watchers)->AfterMode(user, targetuser, targetchannel, parameter, adding, type);
 487
 488                                                                 /* Reset the state change flag */
 489                                                                 state_change = false;
 490
 491                                                                 if ((output_sequence.length() + parameter_list.str().length() > 450) || (output_sequence.length() > 100)
 492                                                                                 || (parameter_count > MAXMODES))
 493                                                                 {
 494                                                                         /* We cant have a mode sequence this long */
 495                                                                         letter = mode_sequence.end() - 1;
 496                                                                         continue;
 497                                                                 }
 498                                                         }
 499                                                 }
 500                                         }
 501                                         else
 502                                         {
 503                                                 /* No mode handler? Unknown mode character then. */
 504                                                 user->WriteServ("472 %s %c :is unknown mode char to me",user->nick, modechar);
 505                                         }
 506                                 break;
 507                         }
 508                 }
 509                 /* Was there at least one valid mode in the sequence? */
 510                 if (output_sequence != "")
 511                 {
 512                         if (servermode)
 513                         {
 514                                 if (type == MODETYPE_CHANNEL)
 515                                 {
 516                                         targetchannel->WriteChannelWithServ(ServerInstance->Config->ServerName, "MODE %s %s%s", targetchannel->name, output_sequence.c_str(), parameter_list.str().c_str());
 517                                         this->LastParse = targetchannel->name;
 518                                 }
 519                                 else
 520                                 {
 521                                         targetuser->WriteServ("MODE %s %s%s",targetuser->nick,output_sequence.c_str(), parameter_list.str().c_str());
 522                                         this->LastParse = targetuser->nick;
 523                                 }
 524                         }
 525                         else
 526                         {
 527                                 if (type == MODETYPE_CHANNEL)
 528                                 {
 529                                         ServerInstance->Log(DEBUG,"Write output sequence and parameters to channel: %s %s%s",targetchannel->name,output_sequence.c_str(),parameter_list.str().c_str());
 530                                         targetchannel->WriteChannel(user,"MODE %s %s%s",targetchannel->name,output_sequence.c_str(),parameter_list.str().c_str());
 531                                         FOREACH_MOD(I_OnMode,OnMode(user, targetchannel, TYPE_CHANNEL, output_sequence + parameter_list.str()));
 532                                         this->LastParse = targetchannel->name;
 533                                 }
 534                                 else
 535                                 {
 536                                         user->WriteTo(targetuser,"MODE %s %s%s",targetuser->nick,output_sequence.c_str(), parameter_list.str().c_str());
 537                                         FOREACH_MOD(I_OnMode,OnMode(user, targetuser, TYPE_USER, output_sequence));
 538                                         this->LastParse = targetuser->nick;
 539                                 }
 540                         }
 541
 542                         LastParse.append(" ");
 543                         LastParse.append(output_sequence);
 544                         LastParse.append(parameter_list.str());
 545                 }
 546         }
 547 }
 548
 549 const std::string& ModeParser::GetLastParse()
 550 {
 551         return LastParse;
 552 }
 553
 554 void ModeParser::CleanMask(std::string &mask)
 555 {
 556         std::string::size_type pos_of_pling = mask.find_first_of('!');
 557         std::string::size_type pos_of_at = mask.find_first_of('@');
 558         std::string::size_type pos_of_dot = mask.find_first_of('.');
 559         std::string::size_type pos_of_colon = mask.find_first_of(':'); /* Because ipv6 addresses are colon delimited */
 560
 561         if ((pos_of_pling == std::string::npos) && (pos_of_at == std::string::npos))
 562         {
 563                 /* Just a nick, or just a host */
 564                 if ((pos_of_dot == std::string::npos) && (pos_of_colon == std::string::npos))
 565                 {
 566                         /* It has no '.' in it, it must be a nick. */
 567                         mask.append("!*@*");
 568                 }
 569                 else
 570                 {
 571                         /* Got a dot in it? Has to be a host */
 572                         mask = "*!*@" + mask;
 573                 }
 574         }
 575         else if ((pos_of_pling == std::string::npos) && (pos_of_at != std::string::npos))
 576         {
 577                 /* Has an @ but no !, its a user@host */
 578                  mask = "*!" + mask;
 579         }
 580         else if ((pos_of_pling != std::string::npos) && (pos_of_at == std::string::npos))
 581         {
 582                 /* Has a ! but no @, it must be a nick!ident */
 583                 mask.append("@*");
 584         }
 585 }
 586
 587 bool ModeParser::AddMode(ModeHandler* mh, unsigned const char modeletter)
 588 {
 589         unsigned char mask = 0;
 590         unsigned char pos = 0;
 591
 592         /* Yes, i know, this might let people declare modes like '_' or '^'.
 593          * If they do that, thats their problem, and if i ever EVER see an
 594          * official InspIRCd developer do that, i'll beat them with a paddle!
 595          */
 596         if ((mh->GetModeChar() < 'A') || (mh->GetModeChar() > 'z'))
 597                 return false;
 598
 599         /* A mode prefix of ',' is not acceptable, it would fuck up server to server.
 600          * A mode prefix of ':' will fuck up both server to server, and client to server.
 601          */
 602         if ((mh->GetPrefix() == ',') || (mh->GetPrefix() == ':'))
 603                 return false;
 604
 605         mh->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
 606         pos = (mh->GetModeChar()-65) | mask;
 607
 608         if (modehandlers[pos])
 609                 return false;
 610
 611         modehandlers[pos] = mh;
 612         ServerInstance->Log(DEBUG,"ModeParser::AddMode: added mode %c",mh->GetModeChar());
 613         return true;
 614 }
 615
 616 bool ModeParser::DelMode(ModeHandler* mh)
 617 {
 618         unsigned char mask = 0;
 619         unsigned char pos = 0;
 620
 621         if ((mh->GetModeChar() < 'A') || (mh->GetModeChar() > 'z'))
 622                 return false;
 623
 624         mh->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
 625         pos = (mh->GetModeChar()-65) | mask;
 626
 627         if (!modehandlers[pos])
 628                 return false;
 629
 630         switch (mh->GetModeType())
 631         {
 632                 case MODETYPE_USER:
 633                         for (user_hash::iterator i = ServerInstance->clientlist.begin(); i != ServerInstance->clientlist.end(); i++)
 634                         {
 635                                 mh->RemoveMode(i->second);
 636                         }
 637                 break;
 638                 case MODETYPE_CHANNEL:
 639                         for (chan_hash::iterator i = ServerInstance->chanlist.begin(); i != ServerInstance->chanlist.end(); i++)
 640                         {
 641                                 mh->RemoveMode(i->second);
 642                         }
 643                 break;
 644         }
 645
 646         modehandlers[pos] = NULL;
 647
 648         return true;
 649 }
 650
 651 ModeHandler* ModeParser::FindMode(unsigned const char modeletter, ModeType mt)
 652 {
 653         unsigned char mask = 0;
 654         unsigned char pos = 0;
 655
 656         if ((modeletter < 'A') || (modeletter > 'z'))
 657                 return NULL;
 658
 659         mt == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
 660         pos = (modeletter-65) | mask;
 661
 662         return modehandlers[pos];
 663 }
 664
 665 std::string ModeParser::UserModeList()
 666 {
 667         char modestr[256];
 668         int pointer = 0;
 669
 670         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 671         {
 672                 unsigned char pos = (mode-65) | MASK_USER;
 673
 674                 if (modehandlers[pos])
 675                         modestr[pointer++] = mode;
 676         }
 677         modestr[pointer++] = 0;
 678         return modestr;
 679 }
 680
 681 std::string ModeParser::ChannelModeList()
 682 {
 683         char modestr[256];
 684         int pointer = 0;
 685
 686         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 687         {
 688                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 689
 690                 if (modehandlers[pos])
 691                         modestr[pointer++] = mode;
 692         }
 693         modestr[pointer++] = 0;
 694         return modestr;
 695 }
 696
 697 std::string ModeParser::ParaModeList()
 698 {
 699         char modestr[256];
 700         int pointer = 0;
 701
 702         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 703         {
 704                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 705
 706                 if ((modehandlers[pos]) && (modehandlers[pos]->GetNumParams(true)))
 707                         modestr[pointer++] = mode;
 708         }
 709         modestr[pointer++] = 0;
 710         return modestr;
 711 }
 712
 713 ModeHandler* ModeParser::FindPrefix(unsigned const char pfxletter)
 714 {
 715         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 716         {
 717                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 718
 719                 if ((modehandlers[pos]) && (modehandlers[pos]->GetPrefix() == pfxletter))
 720                 {
 721                         return modehandlers[pos];
 722                 }
 723         }
 724         return NULL;
 725 }
 726
 727 std::string ModeParser::ModeString(userrec* user, chanrec* channel)
 728 {
 729         std::string types;
 730         std::string pars;
 731
 732         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 733         {
 734                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 735                 ModeHandler* mh = modehandlers[pos];
 736                 if ((mh) && (mh->GetNumParams(true)) && (mh->GetNumParams(false)))
 737                 {
 738                         ModePair ret;
 739                         ret = mh->ModeSet(NULL, user, channel, user->nick);
 740                         if ((ret.first) && (ret.second == user->nick))
 741                         {
 742                                 pars.append(" ");
 743                                 pars.append(user->nick);
 744                                 types.push_back(mh->GetModeChar());
 745                         }
 746                 }
 747         }
 748
 749         return types+pars;
 750 }
 751
 752 std::string ModeParser::ChanModes()
 753 {
 754         std::string type1;      /* Listmodes EXCEPT those with a prefix */
 755         std::string type2;      /* Modes that take a param when adding or removing */
 756         std::string type3;      /* Modes that only take a param when adding */
 757         std::string type4;      /* Modes that dont take a param */
 758
 759         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 760         {
 761                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 762                  /* One parameter when adding */
 763                 if (modehandlers[pos])
 764                 {
 765                         if (modehandlers[pos]->GetNumParams(true))
 766                         {
 767                                 if ((modehandlers[pos]->IsListMode()) && (!modehandlers[pos]->GetPrefix()))
 768                                 {
 769                                         type1 += modehandlers[pos]->GetModeChar();
 770                                 }
 771                                 else
 772                                 {
 773                                         /* ... and one parameter when removing */
 774                                         if (modehandlers[pos]->GetNumParams(false))
 775                                         {
 776                                                 /* But not a list mode */
 777                                                 if (!modehandlers[pos]->GetPrefix())
 778                                                 {
 779                                                         type2 += modehandlers[pos]->GetModeChar();
 780                                                 }
 781                                         }
 782                                         else
 783                                         {
 784                                                 /* No parameters when removing */
 785                                                 type3 += modehandlers[pos]->GetModeChar();
 786                                         }
 787                                 }
 788                         }
 789                         else
 790                         {
 791                                 type4 += modehandlers[pos]->GetModeChar();
 792                         }
 793                 }
 794
 795         }
 796
 797         return type1 + "," + type2 + "," + type3 + "," + type4;
 798 }
 799
 800 bool ModeParser::PrefixComparison(const prefixtype one, const prefixtype two)
 801 {
 802         return one.second > two.second;
 803 }
 804
 805 std::string ModeParser::BuildPrefixes()
 806 {
 807         std::string mletters = "";
 808         std::string mprefixes = "";
 809         pfxcontainer pfx;
 810         std::map<char,char> prefix_to_mode;
 811
 812         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 813         {
 814                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 815
 816                 if ((modehandlers[pos]) && (modehandlers[pos]->GetPrefix()))
 817                 {
 818                         pfx.push_back(std::make_pair<char,unsigned int>(modehandlers[pos]->GetPrefix(), modehandlers[pos]->GetPrefixRank()));
 819                         prefix_to_mode[modehandlers[pos]->GetPrefix()] = modehandlers[pos]->GetModeChar();
 820                 }
 821         }
 822
 823         sort(pfx.begin(), pfx.end(), ModeParser::PrefixComparison);
 824
 825         for (pfxcontainer::iterator n = pfx.begin(); n != pfx.end(); n++)
 826         {
 827                 mletters = mletters + n->first;
 828                 mprefixes = mprefixes + prefix_to_mode.find(n->first)->second;
 829         }
 830
 831         return "(" + mprefixes + ")" + mletters;
 832 }
 833
 834 bool ModeParser::AddModeWatcher(ModeWatcher* mw)
 835 {
 836         unsigned char mask = 0;
 837         unsigned char pos = 0;
 838
 839         if (!mw)
 840                 return false;
 841
 842         if ((mw->GetModeChar() < 'A') || (mw->GetModeChar() > 'z'))
 843                 return false;
 844
 845         mw->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
 846         pos = (mw->GetModeChar()-65) | mask;
 847
 848         modewatchers[pos].push_back(mw);
 849         ServerInstance->Log(DEBUG,"ModeParser::AddModeWatcher: watching mode %c",mw->GetModeChar());
 850
 851         return true;
 852 }
 853
 854 bool ModeParser::DelModeWatcher(ModeWatcher* mw)
 855 {
 856         unsigned char mask = 0;
 857         unsigned char pos = 0;
 858
 859         if (!mw)
 860                 return false;
 861
 862         if ((mw->GetModeType() < 'A') || (mw->GetModeType() > 'z'))
 863                 return false;
 864
 865         mw->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
 866         pos = (mw->GetModeChar()-65) | mask;
 867
 868         ModeWatchIter a = find(modewatchers[pos].begin(),modewatchers[pos].end(),mw);
 869
 870         if (a == modewatchers[pos].end())
 871                 return false;
 872
 873         modewatchers[pos].erase(a);
 874         ServerInstance->Log(DEBUG,"ModeParser::DelModeWatcher: stopped watching mode %c",mw->GetModeChar());
 875
 876         return true;
 877 }
 878
 879 /** This default implementation can remove simple user modes
 880  */
 881 void ModeHandler::RemoveMode(userrec* user)
 882 {
 883         char moderemove[MAXBUF];
 884         const char* parameters[] = { user->nick, moderemove };
 885
 886         if (user->IsModeSet(this->GetModeChar()))
 887         {
 888                 userrec* n = new userrec(ServerInstance);
 889
 890                 sprintf(moderemove,"-%c",this->GetModeChar());
 891                 n->SetFd(FD_MAGIC_NUMBER);
 892
 893                 ServerInstance->SendMode(parameters, 2, n);
 894
 895                 delete n;
 896         }
 897 }
 898
 899 /** This default implementation can remove simple channel modes
 900  * (no parameters)
 901  */
 902 void ModeHandler::RemoveMode(chanrec* channel)
 903 {
 904         char moderemove[MAXBUF];
 905         const char* parameters[] = { channel->name, moderemove };
 906
 907         if (channel->IsModeSet(this->GetModeChar()))
 908         {
 909                 userrec* n = new userrec(ServerInstance);
 910
 911                 sprintf(moderemove,"-%c",this->GetModeChar());
 912                 n->SetFd(FD_MAGIC_NUMBER);
 913
 914                 ServerInstance->SendMode(parameters, 2, n);
 915
 916                 delete n;
 917         }
 918 }
 919
 920 ModeParser::ModeParser(InspIRCd* Instance) : ServerInstance(Instance)
 921 {
 922         /* Clear mode list */
 923         memset(modehandlers, 0, sizeof(modehandlers));
 924         memset(modewatchers, 0, sizeof(modewatchers));
 925
 926         /* Last parse string */
 927         LastParse = "";
 928
 929         /* Initialise the RFC mode letters */
 930
 931         /* Start with channel simple modes, no params */
 932         this->AddMode(new ModeChannelSecret(Instance), 's');
 933         this->AddMode(new ModeChannelPrivate(Instance), 'p');
 934         this->AddMode(new ModeChannelModerated(Instance), 'm');
 935         this->AddMode(new ModeChannelTopicOps(Instance), 't');
 936         this->AddMode(new ModeChannelNoExternal(Instance), 'n');
 937         this->AddMode(new ModeChannelInviteOnly(Instance), 'i');
 938
 939         /* Cannel modes with params */
 940         this->AddMode(new ModeChannelKey(Instance), 'k');
 941         this->AddMode(new ModeChannelLimit(Instance), 'l');
 942
 943         /* Channel listmodes */
 944         this->AddMode(new ModeChannelBan(Instance), 'b');
 945         this->AddMode(new ModeChannelOp(Instance), 'o');
 946         this->AddMode(new ModeChannelHalfOp(Instance), 'h');
 947         this->AddMode(new ModeChannelVoice(Instance), 'v');
 948
 949         /* Now for usermodes */
 950         this->AddMode(new ModeUserServerNotice(Instance), 's');
 951         this->AddMode(new ModeUserWallops(Instance), 'w');
 952         this->AddMode(new ModeUserInvisible(Instance), 'i');
 953         this->AddMode(new ModeUserOperator(Instance), 'o');
 954         this->AddMode(new ModeUserServerNoticeMask(Instance), 'n');
 955 }
 956