src/mode.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2007 InspIRCd Development Team
   6  * See: http://www.inspircd.org/wiki/index.php/Credits
   7  *
   8  * This program is free but copyrighted software; see
   9  *            the file COPYING for details.
  10  *
  11  * ---------------------------------------------------
  12  */
  13
  14 #include "inspircd.h"
  15 #include "users.h"
  16 #include "modules.h"
  17 #include "inspstring.h"
  18 #include "mode.h"
  19
  20 /* +s (secret) */
  21 #include "modes/cmode_s.h"
  22 /* +p (private) */
  23 #include "modes/cmode_p.h"
  24 /* +b (bans) */
  25 #include "modes/cmode_b.h"
  26 /* +m (moderated) */
  27 #include "modes/cmode_m.h"
  28 /* +t (only (half) ops can change topic) */
  29 #include "modes/cmode_t.h"
  30 /* +n (no external messages) */
  31 #include "modes/cmode_n.h"
  32 /* +i (invite only) */
  33 #include "modes/cmode_i.h"
  34 /* +k (keyed channel) */
  35 #include "modes/cmode_k.h"
  36 /* +l (channel user limit) */
  37 #include "modes/cmode_l.h"
  38 /* +o (channel op) */
  39 #include "modes/cmode_o.h"
  40 /* +h (channel halfop) */
  41 #include "modes/cmode_h.h"
  42 /* +v (channel voice) */
  43 #include "modes/cmode_v.h"
  44 /* +s (server notices) */
  45 #include "modes/umode_s.h"
  46 /* +w (see wallops) */
  47 #include "modes/umode_w.h"
  48 /* +i (invisible) */
  49 #include "modes/umode_i.h"
  50 /* +o (operator) */
  51 #include "modes/umode_o.h"
  52 /* +n (notice mask - our implementation of snomasks) */
  53 #include "modes/umode_n.h"
  54
  55 ModeHandler::ModeHandler(InspIRCd* Instance, char modeletter, int parameters_on, int parameters_off, bool listmode, ModeType type, bool operonly, char mprefix)
  56         : ServerInstance(Instance), mode(modeletter), n_params_on(parameters_on), n_params_off(parameters_off), list(listmode), m_type(type), oper(operonly), prefix(mprefix), count(0)
  57 {
  58 }
  59
  60 ModeHandler::~ModeHandler()
  61 {
  62 }
  63
  64 bool ModeHandler::IsListMode()
  65 {
  66         return list;
  67 }
  68
  69 unsigned int ModeHandler::GetPrefixRank()
  70 {
  71         return 0;
  72 }
  73
  74 unsigned int ModeHandler::GetCount()
  75 {
  76         return 0;
  77 }
  78
  79 void ModeHandler::ChangeCount(int modifier)
  80 {
  81         count += modifier;
  82 }
  83
  84 ModeType ModeHandler::GetModeType()
  85 {
  86         return m_type;
  87 }
  88
  89 bool ModeHandler::NeedsOper()
  90 {
  91         return oper;
  92 }
  93
  94 char ModeHandler::GetPrefix()
  95 {
  96         return prefix;
  97 }
  98
  99 int ModeHandler::GetNumParams(bool adding)
 100 {
 101         return adding ? n_params_on : n_params_off;
 102 }
 103
 104 char ModeHandler::GetModeChar()
 105 {
 106         return mode;
 107 }
 108
 109 ModeAction ModeHandler::OnModeChange(userrec* source, userrec* dest, chanrec* channel, std::string &parameter, bool adding)
 110 {
 111         return MODEACTION_DENY;
 112 }
 113
 114 ModePair ModeHandler::ModeSet(userrec* source, userrec* dest, chanrec* channel, const std::string &parameter)
 115 {
 116         if (dest)
 117         {
 118                 return std::make_pair(dest->IsModeSet(this->mode), "");
 119         }
 120         else
 121         {
 122                 return std::make_pair(channel->IsModeSet(this->mode), "");
 123         }
 124 }
 125
 126 void ModeHandler::DisplayList(userrec* user, chanrec* channel)
 127 {
 128 }
 129
 130 bool ModeHandler::CheckTimeStamp(time_t theirs, time_t ours, const std::string &their_param, const std::string &our_param, chanrec* channel)
 131 {
 132         return (ours < theirs);
 133 }
 134
 135 ModeWatcher::ModeWatcher(InspIRCd* Instance, char modeletter, ModeType type) : ServerInstance(Instance), mode(modeletter), m_type(type)
 136 {
 137 }
 138
 139 ModeWatcher::~ModeWatcher()
 140 {
 141 }
 142
 143 char ModeWatcher::GetModeChar()
 144 {
 145         return mode;
 146 }
 147
 148 ModeType ModeWatcher::GetModeType()
 149 {
 150         return m_type;
 151 }
 152
 153 bool ModeWatcher::BeforeMode(userrec* source, userrec* dest, chanrec* channel, std::string &parameter, bool adding, ModeType type)
 154 {
 155         return true;
 156 }
 157
 158 void ModeWatcher::AfterMode(userrec* source, userrec* dest, chanrec* channel, const std::string &parameter, bool adding, ModeType type)
 159 {
 160 }
 161
 162 userrec* ModeParser::SanityChecks(userrec *user,const char *dest,chanrec *chan,int status)
 163 {
 164         userrec *d;
 165         if ((!user) || (!dest) || (!chan) || (!*dest))
 166         {
 167                 return NULL;
 168         }
 169         d = ServerInstance->FindNick(dest);
 170         if (!d)
 171         {
 172                 user->WriteServ("401 %s %s :No such nick/channel",user->nick, dest);
 173                 return NULL;
 174         }
 175         return d;
 176 }
 177
 178 const char* ModeParser::Grant(userrec *d,chanrec *chan,int MASK)
 179 {
 180         if (!chan)
 181                 return "";
 182
 183         UCListIter n = d->chans.find(chan);
 184         if (n != d->chans.end())
 185         {
 186                 if (n->second & MASK)
 187                 {
 188                         return "";
 189                 }
 190                 n->second = n->second | MASK;
 191                 switch (MASK)
 192                 {
 193                         case UCMODE_OP:
 194                                 n->first->AddOppedUser(d);
 195                         break;
 196                         case UCMODE_HOP:
 197                                 n->first->AddHalfoppedUser(d);
 198                         break;
 199                         case UCMODE_VOICE:
 200                                 n->first->AddVoicedUser(d);
 201                         break;
 202                 }
 203                 ServerInstance->Log(DEBUG,"grant: %s %s",n->first->name,d->nick);
 204                 return d->nick;
 205         }
 206         return "";
 207 }
 208
 209 const char* ModeParser::Revoke(userrec *d,chanrec *chan,int MASK)
 210 {
 211         if (!chan)
 212                 return "";
 213
 214         UCListIter n = d->chans.find(chan);
 215         if (n != d->chans.end())
 216         {
 217                 if ((n->second & MASK) == 0)
 218                 {
 219                         return "";
 220                 }
 221                 n->second ^= MASK;
 222                 switch (MASK)
 223                 {
 224                         case UCMODE_OP:
 225                                 n->first->DelOppedUser(d);
 226                         break;
 227                         case UCMODE_HOP:
 228                                 n->first->DelHalfoppedUser(d);
 229                         break;
 230                         case UCMODE_VOICE:
 231                                 n->first->DelVoicedUser(d);
 232                         break;
 233                 }
 234                 ServerInstance->Log(DEBUG,"revoke: %s %s",n->first->name,d->nick);
 235                 return d->nick;
 236         }
 237         return "";
 238 }
 239
 240 void ModeParser::DisplayCurrentModes(userrec *user, userrec* targetuser, chanrec* targetchannel, const char* text)
 241 {
 242         if (targetchannel)
 243         {
 244                 /* Display channel's current mode string */
 245                 user->WriteServ("324 %s %s +%s",user->nick, targetchannel->name, targetchannel->ChanModes(targetchannel->HasUser(user)));
 246                 user->WriteServ("329 %s %s %lu", user->nick, targetchannel->name, (unsigned long)targetchannel->age);
 247                 return;
 248         }
 249         else if (targetuser)
 250         {
 251                 if ((targetuser == user) || (*user->oper))
 252                 {
 253                         /* Display user's current mode string */
 254                         user->WriteServ("221 %s :+%s",targetuser->nick,targetuser->FormatModes());
 255                         if (*targetuser->oper)
 256                                 user->WriteServ("008 %s +%s :Server notice mask", targetuser->nick, targetuser->FormatNoticeMasks());
 257                         return;
 258                 }
 259                 else
 260                 {
 261                         user->WriteServ("502 %s :Can't change mode for other users", user->nick);
 262                         return;
 263                 }
 264         }
 265
 266         /* No such nick/channel */
 267         user->WriteServ("401 %s %s :No such nick/channel",user->nick, text);
 268         return;
 269 }
 270
 271 void ModeParser::Process(const char** parameters, int pcnt, userrec *user, bool servermode)
 272 {
 273         std::string target = parameters[0];
 274         ModeType type = MODETYPE_USER;
 275         unsigned char mask = 0;
 276         chanrec* targetchannel = ServerInstance->FindChan(parameters[0]);
 277         userrec* targetuser  = ServerInstance->FindNick(parameters[0]);
 278
 279         ServerInstance->Log(DEBUG,"ModeParser::Process start: pcnt=%d",pcnt);
 280
 281         LastParse = "";
 282
 283         /* Special case for displaying the list for listmodes,
 284          * e.g. MODE #chan b, or MODE #chan +b without a parameter
 285          */
 286         if ((targetchannel) && (pcnt == 2))
 287         {
 288                 ServerInstance->Log(DEBUG,"Spool list");
 289                 const char* mode = parameters[1];
 290
 291                 while (mode && *mode)
 292                 {
 293                         if (*mode == '+')
 294                         {
 295                                 mode++;
 296                                 continue;
 297                         }
 298
 299                         ModeHandler *mh = this->FindMode(*mode, MODETYPE_CHANNEL);
 300
 301                         if ((mh) && (mh->IsListMode()))
 302                         {
 303                                 mh->DisplayList(user, targetchannel);
 304                         }
 305
 306                         mode++;
 307                 }
 308         }
 309
 310         if (pcnt == 1)
 311         {
 312                 ServerInstance->Log(DEBUG,"Mode list request");
 313                 this->DisplayCurrentModes(user, targetuser, targetchannel, parameters[0]);
 314         }
 315         else if (pcnt > 1)
 316         {
 317                 ServerInstance->Log(DEBUG,"More than one parameter");
 318
 319                 if (targetchannel)
 320                 {
 321                         type = MODETYPE_CHANNEL;
 322                         mask = MASK_CHANNEL;
 323
 324                         /* Extra security checks on channel modes
 325                          * (e.g. are they a (half)op?
 326                          */
 327
 328                         if ((IS_LOCAL(user)) && (targetchannel->GetStatus(user) < STATUS_HOP))
 329                         {
 330                                 /* We don't have halfop */
 331                                 ServerInstance->Log(DEBUG,"The user is not a halfop or above, checking other reasons for being able to set the modes");
 332
 333                                 int MOD_RESULT = 0;
 334                                 FOREACH_RESULT(I_OnAccessCheck,OnAccessCheck(user, NULL, targetchannel, AC_GENERAL_MODE));
 335                                 if (MOD_RESULT == ACR_DENY)
 336                                         return;
 337
 338                                 if (MOD_RESULT == ACR_DEFAULT)
 339                                 {
 340                                         /* Are we a uline or is it a servermode? */
 341                                         if ((!ServerInstance->ULine(user->server)) && (!servermode))
 342                                         {
 343                                                 /* Not enough permission:
 344                                                  * NOT a uline and NOT a servermode,
 345                                                  * OR, NOT halfop or above.
 346                                                  */
 347                                                 user->WriteServ("482 %s %s :You're not a channel (half)operator",user->nick, targetchannel->name);
 348                                                 return;
 349                                         }
 350                                 }
 351                         }
 352                 }
 353                 else if (targetuser)
 354                 {
 355                         type = MODETYPE_USER;
 356                         mask = MASK_USER;
 357                         if ((user != targetuser) && (!ServerInstance->ULine(user->server)))
 358                         {
 359                                 user->WriteServ("502 %s :Can't change mode for other users", user->nick);
 360                                 return;
 361                         }
 362                 }
 363                 else
 364                 {
 365                         /* No such nick/channel */
 366                         user->WriteServ("401 %s %s :No such nick/channel",user->nick, parameters[0]);
 367                         return;
 368                 }
 369
 370                 std::string mode_sequence = parameters[1];
 371                 std::string parameter = "";
 372                 std::ostringstream parameter_list;
 373                 std::string output_sequence = "";
 374                 bool adding = true, state_change = false;
 375                 unsigned char handler_id = 0;
 376                 int parameter_counter = 2; /* Index of first parameter */
 377                 int parameter_count = 0;
 378
 379                 /* A mode sequence that doesnt start with + or -. Assume +. - Thanks for the suggestion spike (bug#132) */
 380                 if ((*mode_sequence.begin() != '+') && (*mode_sequence.begin() != '-'))
 381                         mode_sequence.insert(0, "+");
 382
 383                 for (std::string::const_iterator letter = mode_sequence.begin(); letter != mode_sequence.end(); letter++)
 384                 {
 385                         unsigned char modechar = *letter;
 386
 387                         switch (modechar)
 388                         {
 389                                 /* NB:
 390                                  * For + and - mode characters, we don't just stick the character into the output sequence.
 391                                  * This is because the user may do something dumb, like: +-+ooo or +oo-+. To prevent this
 392                                  * appearing in the output sequence, we store a flag which says there was a state change,
 393                                  * which is set on any + or -, however, the + or - that we finish on is only appended to
 394                                  * the output stream in the event it is followed by a non "+ or -" character, such as o or v.
 395                                  */
 396                                 case '+':
 397                                         /* The following expression prevents: +o+o nick nick, compressing it to +oo nick nick,
 398                                          * however, will allow the + if it is the first item in the sequence, regardless.
 399                                          */
 400                                         if ((!adding) || (!output_sequence.length()))
 401                                                 state_change = true;
 402                                         adding = true;
 403                                         continue;
 404                                 break;
 405                                 case '-':
 406                                         if ((adding) || (!output_sequence.length()))
 407                                                 state_change = true;
 408                                         adding = false;
 409                                         continue;
 410                                 break;
 411                                 default:
 412
 413                                         /**
 414                                          * Watch carefully for the sleight of hand trick.
 415                                          * 65 is the ascii value of 'A'. We take this from
 416                                          * the char we're looking at to get a number between
 417                                          * 1 and 127. We then logic-or it to get the hashed
 418                                          * position, dependent on wether its a channel or
 419                                          * a user mode. This is a little stranger, but a lot
 420                                          * faster, than using a map of pairs.
 421                                          */
 422                                         handler_id = (modechar - 65) | mask;
 423
 424                                         if (modehandlers[handler_id])
 425                                         {
 426                                                 bool abort = false;
 427
 428                                                 for (ModeWatchIter watchers = modewatchers[handler_id].begin(); watchers != modewatchers[handler_id].end(); watchers++)
 429                                                 {
 430                                                         if ((*watchers)->BeforeMode(user, targetuser, targetchannel, parameter, adding, type) == MODEACTION_DENY)
 431                                                                 abort = true;
 432                                                 }
 433                                                 if ((modehandlers[handler_id]->GetModeType() == type) && (!abort))
 434                                                 {
 435                                                         if (modehandlers[handler_id]->GetNumParams(adding))
 436                                                         {
 437                                                                 /* This mode expects a parameter, do we have any parameters left in our list to use? */
 438                                                                 if (parameter_counter < pcnt)
 439                                                                 {
 440                                                                         ServerInstance->Log(DEBUG,"parameter_counter = %d, pcnt = %d", parameter_counter, pcnt);
 441                                                                         parameter = parameters[parameter_counter++];
 442
 443                                                                         /* Yerk, invalid! */
 444                                                                         if ((parameter.find(':') == 0) || (parameter.rfind(' ') != std::string::npos))
 445                                                                                 parameter = "";
 446                                                                 }
 447                                                                 else
 448                                                                 {
 449                                                                         /* No parameter, continue to the next mode */
 450                                                                         continue;
 451                                                                 }
 452                                                         }
 453
 454                                                         /* It's an oper only mode, check if theyre an oper. If they arent,
 455                                                          * eat any parameter that  came with the mode, and continue to next
 456                                                          */
 457                                                         if ((IS_LOCAL(user)) && (modehandlers[handler_id]->NeedsOper()) && (!*user->oper))
 458                                                         {
 459                                                                 user->WriteServ("481 %s :Permission Denied- Only IRC operators may %sset %s mode %c", user->nick,
 460                                                                                 adding ? "" : "un", type == MODETYPE_CHANNEL ? "channel" : "user",
 461                                                                                 modehandlers[handler_id]->GetModeChar());
 462                                                                 continue;
 463                                                         }
 464
 465                                                         /* Call the handler for the mode */
 466                                                         ModeAction ma = modehandlers[handler_id]->OnModeChange(user, targetuser, targetchannel, parameter, adding);
 467
 468                                                         if ((modehandlers[handler_id]->GetNumParams(adding)) && (parameter == ""))
 469                                                         {
 470                                                                 /* The handler nuked the parameter and they are supposed to have one.
 471                                                                  * We CANT continue now, even if they actually returned MODEACTION_ALLOW,
 472                                                                  * so we bail to the next mode character.
 473                                                                  */
 474                                                                 continue;
 475                                                         }
 476
 477                                                         if (ma == MODEACTION_ALLOW)
 478                                                         {
 479                                                                 /* We're about to output a valid mode letter - was there previously a pending state-change? */
 480                                                                 if (state_change)
 481                                                                         output_sequence.append(adding ? "+" : "-");
 482
 483                                                                 /* Add the mode letter */
 484                                                                 output_sequence.push_back(modechar);
 485
 486                                                                 /* Is there a valid parameter for this mode? If so add it to the parameter list */
 487                                                                 if ((modehandlers[handler_id]->GetNumParams(adding)) && (parameter != ""))
 488                                                                 {
 489                                                                         parameter_list << " " << parameter;
 490                                                                         parameter_count++;
 491                                                                         /* Does this mode have a prefix? */
 492                                                                         if (modehandlers[handler_id]->GetPrefix() && targetchannel)
 493                                                                         {
 494                                                                                 userrec* user_to_prefix = ServerInstance->FindNick(parameter);
 495                                                                                 if (user_to_prefix)
 496                                                                                         targetchannel->SetPrefix(user_to_prefix, modehandlers[handler_id]->GetPrefix(),
 497                                                                                                         modehandlers[handler_id]->GetPrefixRank(), adding);
 498                                                                         }
 499                                                                 }
 500
 501                                                                 /* Call all the AfterMode events in the mode watchers for this mode */
 502                                                                 for (ModeWatchIter watchers = modewatchers[handler_id].begin(); watchers != modewatchers[handler_id].end(); watchers++)
 503                                                                         (*watchers)->AfterMode(user, targetuser, targetchannel, parameter, adding, type);
 504
 505                                                                 /* Reset the state change flag */
 506                                                                 state_change = false;
 507
 508                                                                 if ((output_sequence.length() + parameter_list.str().length() > 450) || (output_sequence.length() > 100)
 509                                                                                 || (parameter_count > MAXMODES))
 510                                                                 {
 511                                                                         /* We cant have a mode sequence this long */
 512                                                                         letter = mode_sequence.end() - 1;
 513                                                                         continue;
 514                                                                 }
 515                                                         }
 516                                                 }
 517                                         }
 518                                         else
 519                                         {
 520                                                 /* No mode handler? Unknown mode character then. */
 521                                                 user->WriteServ("472 %s %c :is unknown mode char to me",user->nick, modechar);
 522                                         }
 523                                 break;
 524                         }
 525                 }
 526                 /* Was there at least one valid mode in the sequence? */
 527                 if (output_sequence != "")
 528                 {
 529                         if (servermode)
 530                         {
 531                                 if (type == MODETYPE_CHANNEL)
 532                                 {
 533                                         targetchannel->WriteChannelWithServ(ServerInstance->Config->ServerName, "MODE %s %s%s", targetchannel->name, output_sequence.c_str(), parameter_list.str().c_str());
 534                                         this->LastParse = targetchannel->name;
 535                                 }
 536                                 else
 537                                 {
 538                                         targetuser->WriteServ("MODE %s %s%s",targetuser->nick,output_sequence.c_str(), parameter_list.str().c_str());
 539                                         this->LastParse = targetuser->nick;
 540                                 }
 541                         }
 542                         else
 543                         {
 544                                 if (type == MODETYPE_CHANNEL)
 545                                 {
 546                                         ServerInstance->Log(DEBUG,"Write output sequence and parameters to channel: %s %s%s",targetchannel->name,output_sequence.c_str(),parameter_list.str().c_str());
 547                                         targetchannel->WriteChannel(user,"MODE %s %s%s",targetchannel->name,output_sequence.c_str(),parameter_list.str().c_str());
 548                                         FOREACH_MOD(I_OnMode,OnMode(user, targetchannel, TYPE_CHANNEL, output_sequence + parameter_list.str()));
 549                                         this->LastParse = targetchannel->name;
 550                                 }
 551                                 else
 552                                 {
 553                                         user->WriteTo(targetuser,"MODE %s %s%s",targetuser->nick,output_sequence.c_str(), parameter_list.str().c_str());
 554                                         FOREACH_MOD(I_OnMode,OnMode(user, targetuser, TYPE_USER, output_sequence + parameter_list.str()));
 555                                         this->LastParse = targetuser->nick;
 556                                 }
 557                         }
 558
 559                         LastParse.append(" ");
 560                         LastParse.append(output_sequence);
 561                         LastParse.append(parameter_list.str());
 562                 }
 563         }
 564 }
 565
 566 const std::string& ModeParser::GetLastParse()
 567 {
 568         return LastParse;
 569 }
 570
 571 void ModeParser::CleanMask(std::string &mask)
 572 {
 573         std::string::size_type pos_of_pling = mask.find_first_of('!');
 574         std::string::size_type pos_of_at = mask.find_first_of('@');
 575         std::string::size_type pos_of_dot = mask.find_first_of('.');
 576         std::string::size_type pos_of_colon = mask.find_first_of(':'); /* Because ipv6 addresses are colon delimited */
 577
 578         if ((pos_of_pling == std::string::npos) && (pos_of_at == std::string::npos))
 579         {
 580                 /* Just a nick, or just a host */
 581                 if ((pos_of_dot == std::string::npos) && (pos_of_colon == std::string::npos))
 582                 {
 583                         /* It has no '.' in it, it must be a nick. */
 584                         mask.append("!*@*");
 585                 }
 586                 else
 587                 {
 588                         /* Got a dot in it? Has to be a host */
 589                         mask = "*!*@" + mask;
 590                 }
 591         }
 592         else if ((pos_of_pling == std::string::npos) && (pos_of_at != std::string::npos))
 593         {
 594                 /* Has an @ but no !, its a user@host */
 595                  mask = "*!" + mask;
 596         }
 597         else if ((pos_of_pling != std::string::npos) && (pos_of_at == std::string::npos))
 598         {
 599                 /* Has a ! but no @, it must be a nick!ident */
 600                 mask.append("@*");
 601         }
 602 }
 603
 604 bool ModeParser::AddMode(ModeHandler* mh, unsigned const char modeletter)
 605 {
 606         unsigned char mask = 0;
 607         unsigned char pos = 0;
 608
 609         /* Yes, i know, this might let people declare modes like '_' or '^'.
 610          * If they do that, thats their problem, and if i ever EVER see an
 611          * official InspIRCd developer do that, i'll beat them with a paddle!
 612          */
 613         if ((mh->GetModeChar() < 'A') || (mh->GetModeChar() > 'z'))
 614                 return false;
 615
 616         /* A mode prefix of ',' is not acceptable, it would fuck up server to server.
 617          * A mode prefix of ':' will fuck up both server to server, and client to server.
 618          * A mode prefix of '#' will mess up /whois and /privmsg
 619          */
 620         if ((mh->GetPrefix() == ',') || (mh->GetPrefix() == ':') || (mh->GetPrefix() == '#'))
 621                 return false;
 622
 623         mh->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
 624         pos = (mh->GetModeChar()-65) | mask;
 625
 626         if (modehandlers[pos])
 627                 return false;
 628
 629         modehandlers[pos] = mh;
 630         ServerInstance->Log(DEBUG,"ModeParser::AddMode: added mode %c",mh->GetModeChar());
 631         return true;
 632 }
 633
 634 bool ModeParser::DelMode(ModeHandler* mh)
 635 {
 636         unsigned char mask = 0;
 637         unsigned char pos = 0;
 638
 639         if ((mh->GetModeChar() < 'A') || (mh->GetModeChar() > 'z'))
 640                 return false;
 641
 642         mh->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
 643         pos = (mh->GetModeChar()-65) | mask;
 644
 645         if (!modehandlers[pos])
 646                 return false;
 647
 648         switch (mh->GetModeType())
 649         {
 650                 case MODETYPE_USER:
 651                         for (user_hash::iterator i = ServerInstance->clientlist->begin(); i != ServerInstance->clientlist->end(); i++)
 652                         {
 653                                 mh->RemoveMode(i->second);
 654                         }
 655                 break;
 656                 case MODETYPE_CHANNEL:
 657                         for (chan_hash::iterator i = ServerInstance->chanlist->begin(); i != ServerInstance->chanlist->end(); i++)
 658                         {
 659                                 mh->RemoveMode(i->second);
 660                         }
 661                 break;
 662         }
 663
 664         modehandlers[pos] = NULL;
 665
 666         return true;
 667 }
 668
 669 ModeHandler* ModeParser::FindMode(unsigned const char modeletter, ModeType mt)
 670 {
 671         unsigned char mask = 0;
 672         unsigned char pos = 0;
 673
 674         if ((modeletter < 'A') || (modeletter > 'z'))
 675                 return NULL;
 676
 677         mt == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
 678         pos = (modeletter-65) | mask;
 679
 680         return modehandlers[pos];
 681 }
 682
 683 std::string ModeParser::UserModeList()
 684 {
 685         char modestr[256];
 686         int pointer = 0;
 687
 688         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 689         {
 690                 unsigned char pos = (mode-65) | MASK_USER;
 691
 692                 if (modehandlers[pos])
 693                         modestr[pointer++] = mode;
 694         }
 695         modestr[pointer++] = 0;
 696         return modestr;
 697 }
 698
 699 std::string ModeParser::ChannelModeList()
 700 {
 701         char modestr[256];
 702         int pointer = 0;
 703
 704         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 705         {
 706                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 707
 708                 if (modehandlers[pos])
 709                         modestr[pointer++] = mode;
 710         }
 711         modestr[pointer++] = 0;
 712         return modestr;
 713 }
 714
 715 std::string ModeParser::ParaModeList()
 716 {
 717         char modestr[256];
 718         int pointer = 0;
 719
 720         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 721         {
 722                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 723
 724                 if ((modehandlers[pos]) && (modehandlers[pos]->GetNumParams(true)))
 725                         modestr[pointer++] = mode;
 726         }
 727         modestr[pointer++] = 0;
 728         return modestr;
 729 }
 730
 731 ModeHandler* ModeParser::FindPrefix(unsigned const char pfxletter)
 732 {
 733         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 734         {
 735                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 736
 737                 if ((modehandlers[pos]) && (modehandlers[pos]->GetPrefix() == pfxletter))
 738                 {
 739                         return modehandlers[pos];
 740                 }
 741         }
 742         return NULL;
 743 }
 744
 745 std::string ModeParser::ModeString(userrec* user, chanrec* channel)
 746 {
 747         std::string types;
 748         std::string pars;
 749
 750         if (!channel || !user)
 751                 return "";
 752
 753         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 754         {
 755                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 756                 ModeHandler* mh = modehandlers[pos];
 757                 if ((mh) && (mh->GetNumParams(true)) && (mh->GetNumParams(false)))
 758                 {
 759                         ModePair ret;
 760                         ret = mh->ModeSet(NULL, user, channel, user->nick);
 761                         if ((ret.first) && (ret.second == user->nick))
 762                         {
 763                                 pars.append(" ");
 764                                 pars.append(user->nick);
 765                                 types.push_back(mh->GetModeChar());
 766                         }
 767                 }
 768         }
 769
 770         return types+pars;
 771 }
 772
 773 std::string ModeParser::ChanModes()
 774 {
 775         std::string type1;      /* Listmodes EXCEPT those with a prefix */
 776         std::string type2;      /* Modes that take a param when adding or removing */
 777         std::string type3;      /* Modes that only take a param when adding */
 778         std::string type4;      /* Modes that dont take a param */
 779
 780         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 781         {
 782                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 783                  /* One parameter when adding */
 784                 if (modehandlers[pos])
 785                 {
 786                         if (modehandlers[pos]->GetNumParams(true))
 787                         {
 788                                 if ((modehandlers[pos]->IsListMode()) && (!modehandlers[pos]->GetPrefix()))
 789                                 {
 790                                         type1 += modehandlers[pos]->GetModeChar();
 791                                 }
 792                                 else
 793                                 {
 794                                         /* ... and one parameter when removing */
 795                                         if (modehandlers[pos]->GetNumParams(false))
 796                                         {
 797                                                 /* But not a list mode */
 798                                                 if (!modehandlers[pos]->GetPrefix())
 799                                                 {
 800                                                         type2 += modehandlers[pos]->GetModeChar();
 801                                                 }
 802                                         }
 803                                         else
 804                                         {
 805                                                 /* No parameters when removing */
 806                                                 type3 += modehandlers[pos]->GetModeChar();
 807                                         }
 808                                 }
 809                         }
 810                         else
 811                         {
 812                                 type4 += modehandlers[pos]->GetModeChar();
 813                         }
 814                 }
 815
 816         }
 817
 818         return type1 + "," + type2 + "," + type3 + "," + type4;
 819 }
 820
 821 bool ModeParser::PrefixComparison(const prefixtype one, const prefixtype two)
 822 {
 823         return one.second > two.second;
 824 }
 825
 826 std::string ModeParser::BuildPrefixes()
 827 {
 828         std::string mletters = "";
 829         std::string mprefixes = "";
 830         pfxcontainer pfx;
 831         std::map<char,char> prefix_to_mode;
 832
 833         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 834         {
 835                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 836
 837                 if ((modehandlers[pos]) && (modehandlers[pos]->GetPrefix()))
 838                 {
 839                         pfx.push_back(std::make_pair<char,unsigned int>(modehandlers[pos]->GetPrefix(), modehandlers[pos]->GetPrefixRank()));
 840                         prefix_to_mode[modehandlers[pos]->GetPrefix()] = modehandlers[pos]->GetModeChar();
 841                 }
 842         }
 843
 844         sort(pfx.begin(), pfx.end(), ModeParser::PrefixComparison);
 845
 846         for (pfxcontainer::iterator n = pfx.begin(); n != pfx.end(); n++)
 847         {
 848                 mletters = mletters + n->first;
 849                 mprefixes = mprefixes + prefix_to_mode.find(n->first)->second;
 850         }
 851
 852         return "(" + mprefixes + ")" + mletters;
 853 }
 854
 855 bool ModeParser::AddModeWatcher(ModeWatcher* mw)
 856 {
 857         unsigned char mask = 0;
 858         unsigned char pos = 0;
 859
 860         if (!mw)
 861                 return false;
 862
 863         if ((mw->GetModeChar() < 'A') || (mw->GetModeChar() > 'z'))
 864                 return false;
 865
 866         mw->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
 867         pos = (mw->GetModeChar()-65) | mask;
 868
 869         modewatchers[pos].push_back(mw);
 870         ServerInstance->Log(DEBUG,"ModeParser::AddModeWatcher: watching mode %c",mw->GetModeChar());
 871
 872         return true;
 873 }
 874
 875 bool ModeParser::DelModeWatcher(ModeWatcher* mw)
 876 {
 877         unsigned char mask = 0;
 878         unsigned char pos = 0;
 879
 880         if (!mw)
 881                 return false;
 882
 883         if ((mw->GetModeChar() < 'A') || (mw->GetModeChar() > 'z'))
 884                 return false;
 885
 886         mw->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
 887         pos = (mw->GetModeChar()-65) | mask;
 888
 889         ModeWatchIter a = find(modewatchers[pos].begin(),modewatchers[pos].end(),mw);
 890
 891         if (a == modewatchers[pos].end())
 892         {
 893                 ServerInstance->Log(DEBUG, "ModeParser::DelModeWatcher: Couldn't find watcher for mode %c in list", mw->GetModeChar());
 894                 return false;
 895         }
 896
 897         modewatchers[pos].erase(a);
 898         ServerInstance->Log(DEBUG,"ModeParser::DelModeWatcher: stopped watching mode %c",mw->GetModeChar());
 899
 900         return true;
 901 }
 902
 903 /** This default implementation can remove simple user modes
 904  */
 905 void ModeHandler::RemoveMode(userrec* user)
 906 {
 907         char moderemove[MAXBUF];
 908         const char* parameters[] = { user->nick, moderemove };
 909
 910         if (user->IsModeSet(this->GetModeChar()))
 911         {
 912                 sprintf(moderemove,"-%c",this->GetModeChar());
 913                 ServerInstance->Parser->CallHandler("MODE", parameters, 2, user);
 914         }
 915 }
 916
 917 /** This default implementation can remove simple channel modes
 918  * (no parameters)
 919  */
 920 void ModeHandler::RemoveMode(chanrec* channel)
 921 {
 922         char moderemove[MAXBUF];
 923         const char* parameters[] = { channel->name, moderemove };
 924
 925         if (channel->IsModeSet(this->GetModeChar()))
 926         {
 927                 userrec* n = new userrec(ServerInstance);
 928
 929                 sprintf(moderemove,"-%c",this->GetModeChar());
 930                 n->SetFd(FD_MAGIC_NUMBER);
 931
 932                 ServerInstance->SendMode(parameters, 2, n);
 933
 934                 delete n;
 935         }
 936 }
 937
 938 ModeParser::ModeParser(InspIRCd* Instance) : ServerInstance(Instance)
 939 {
 940         /* Clear mode list */
 941         memset(modehandlers, 0, sizeof(modehandlers));
 942         memset(modewatchers, 0, sizeof(modewatchers));
 943
 944         /* Last parse string */
 945         LastParse = "";
 946
 947         /* Initialise the RFC mode letters */
 948
 949         /* Start with channel simple modes, no params */
 950         this->AddMode(new ModeChannelSecret(Instance), 's');
 951         this->AddMode(new ModeChannelPrivate(Instance), 'p');
 952         this->AddMode(new ModeChannelModerated(Instance), 'm');
 953         this->AddMode(new ModeChannelTopicOps(Instance), 't');
 954         this->AddMode(new ModeChannelNoExternal(Instance), 'n');
 955         this->AddMode(new ModeChannelInviteOnly(Instance), 'i');
 956
 957         /* Cannel modes with params */
 958         this->AddMode(new ModeChannelKey(Instance), 'k');
 959         this->AddMode(new ModeChannelLimit(Instance), 'l');
 960
 961         /* Channel listmodes */
 962         this->AddMode(new ModeChannelBan(Instance), 'b');
 963         this->AddMode(new ModeChannelOp(Instance), 'o');
 964         this->AddMode(new ModeChannelHalfOp(Instance), 'h');
 965         this->AddMode(new ModeChannelVoice(Instance), 'v');
 966
 967         /* Now for usermodes */
 968         this->AddMode(new ModeUserServerNotice(Instance), 's');
 969         this->AddMode(new ModeUserWallops(Instance), 'w');
 970         this->AddMode(new ModeUserInvisible(Instance), 'i');
 971         this->AddMode(new ModeUserOperator(Instance), 'o');
 972         this->AddMode(new ModeUserServerNoticeMask(Instance), 'n');
 973 }