src/mode.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2007 InspIRCd Development Team
   6  * See: http://www.inspircd.org/wiki/index.php/Credits
   7  *
   8  * This program is free but copyrighted software; see
   9  *            the file COPYING for details.
  10  *
  11  * ---------------------------------------------------
  12  */
  13
  14 #include "inspircd.h"
  15 #include "users.h"
  16 #include "modules.h"
  17 #include "inspstring.h"
  18 #include "mode.h"
  19
  20 /* +s (secret) */
  21 #include "modes/cmode_s.h"
  22 /* +p (private) */
  23 #include "modes/cmode_p.h"
  24 /* +b (bans) */
  25 #include "modes/cmode_b.h"
  26 /* +m (moderated) */
  27 #include "modes/cmode_m.h"
  28 /* +t (only (half) ops can change topic) */
  29 #include "modes/cmode_t.h"
  30 /* +n (no external messages) */
  31 #include "modes/cmode_n.h"
  32 /* +i (invite only) */
  33 #include "modes/cmode_i.h"
  34 /* +k (keyed channel) */
  35 #include "modes/cmode_k.h"
  36 /* +l (channel user limit) */
  37 #include "modes/cmode_l.h"
  38 /* +o (channel op) */
  39 #include "modes/cmode_o.h"
  40 /* +h (channel halfop) */
  41 #include "modes/cmode_h.h"
  42 /* +v (channel voice) */
  43 #include "modes/cmode_v.h"
  44 /* +s (server notices) */
  45 #include "modes/umode_s.h"
  46 /* +w (see wallops) */
  47 #include "modes/umode_w.h"
  48 /* +i (invisible) */
  49 #include "modes/umode_i.h"
  50 /* +o (operator) */
  51 #include "modes/umode_o.h"
  52 /* +n (notice mask - our implementation of snomasks) */
  53 #include "modes/umode_n.h"
  54
  55 ModeHandler::ModeHandler(InspIRCd* Instance, char modeletter, int parameters_on, int parameters_off, bool listmode, ModeType type, bool operonly, char mprefix)
  56         : ServerInstance(Instance), mode(modeletter), n_params_on(parameters_on), n_params_off(parameters_off), list(listmode), m_type(type), oper(operonly), prefix(mprefix), count(0)
  57 {
  58 }
  59
  60 ModeHandler::~ModeHandler()
  61 {
  62 }
  63
  64 bool ModeHandler::IsListMode()
  65 {
  66         return list;
  67 }
  68
  69 unsigned int ModeHandler::GetPrefixRank()
  70 {
  71         return 0;
  72 }
  73
  74 unsigned int ModeHandler::GetCount()
  75 {
  76         return 0;
  77 }
  78
  79 void ModeHandler::ChangeCount(int modifier)
  80 {
  81         count += modifier;
  82 }
  83
  84 ModeType ModeHandler::GetModeType()
  85 {
  86         return m_type;
  87 }
  88
  89 bool ModeHandler::NeedsOper()
  90 {
  91         return oper;
  92 }
  93
  94 char ModeHandler::GetPrefix()
  95 {
  96         return prefix;
  97 }
  98
  99 int ModeHandler::GetNumParams(bool adding)
 100 {
 101         return adding ? n_params_on : n_params_off;
 102 }
 103
 104 char ModeHandler::GetModeChar()
 105 {
 106         return mode;
 107 }
 108
 109 ModeAction ModeHandler::OnModeChange(userrec* source, userrec* dest, chanrec* channel, std::string &parameter, bool adding)
 110 {
 111         return MODEACTION_DENY;
 112 }
 113
 114 ModePair ModeHandler::ModeSet(userrec* source, userrec* dest, chanrec* channel, const std::string &parameter)
 115 {
 116         if (dest)
 117         {
 118                 return std::make_pair(dest->IsModeSet(this->mode), "");
 119         }
 120         else
 121         {
 122                 return std::make_pair(channel->IsModeSet(this->mode), "");
 123         }
 124 }
 125
 126 void ModeHandler::DisplayList(userrec* user, chanrec* channel)
 127 {
 128 }
 129
 130 bool ModeHandler::CheckTimeStamp(time_t theirs, time_t ours, const std::string &their_param, const std::string &our_param, chanrec* channel)
 131 {
 132         return (ours < theirs);
 133 }
 134
 135 ModeWatcher::ModeWatcher(InspIRCd* Instance, char modeletter, ModeType type) : ServerInstance(Instance), mode(modeletter), m_type(type)
 136 {
 137 }
 138
 139 ModeWatcher::~ModeWatcher()
 140 {
 141 }
 142
 143 char ModeWatcher::GetModeChar()
 144 {
 145         return mode;
 146 }
 147
 148 ModeType ModeWatcher::GetModeType()
 149 {
 150         return m_type;
 151 }
 152
 153 bool ModeWatcher::BeforeMode(userrec* source, userrec* dest, chanrec* channel, std::string &parameter, bool adding, ModeType type)
 154 {
 155         return true;
 156 }
 157
 158 void ModeWatcher::AfterMode(userrec* source, userrec* dest, chanrec* channel, const std::string &parameter, bool adding, ModeType type)
 159 {
 160 }
 161
 162 userrec* ModeParser::SanityChecks(userrec *user,const char *dest,chanrec *chan,int status)
 163 {
 164         userrec *d;
 165         if ((!user) || (!dest) || (!chan) || (!*dest))
 166         {
 167                 return NULL;
 168         }
 169         d = ServerInstance->FindNick(dest);
 170         if (!d)
 171         {
 172                 user->WriteServ("401 %s %s :No such nick/channel",user->nick, dest);
 173                 return NULL;
 174         }
 175         return d;
 176 }
 177
 178 const char* ModeParser::Grant(userrec *d,chanrec *chan,int MASK)
 179 {
 180         if (!chan)
 181                 return "";
 182
 183         UCListIter n = d->chans.find(chan);
 184         if (n != d->chans.end())
 185         {
 186                 if (n->second & MASK)
 187                 {
 188                         return "";
 189                 }
 190                 n->second = n->second | MASK;
 191                 switch (MASK)
 192                 {
 193                         case UCMODE_OP:
 194                                 n->first->AddOppedUser(d);
 195                         break;
 196                         case UCMODE_HOP:
 197                                 n->first->AddHalfoppedUser(d);
 198                         break;
 199                         case UCMODE_VOICE:
 200                                 n->first->AddVoicedUser(d);
 201                         break;
 202                 }
 203                 return d->nick;
 204         }
 205         return "";
 206 }
 207
 208 const char* ModeParser::Revoke(userrec *d,chanrec *chan,int MASK)
 209 {
 210         if (!chan)
 211                 return "";
 212
 213         UCListIter n = d->chans.find(chan);
 214         if (n != d->chans.end())
 215         {
 216                 if ((n->second & MASK) == 0)
 217                 {
 218                         return "";
 219                 }
 220                 n->second ^= MASK;
 221                 switch (MASK)
 222                 {
 223                         case UCMODE_OP:
 224                                 n->first->DelOppedUser(d);
 225                         break;
 226                         case UCMODE_HOP:
 227                                 n->first->DelHalfoppedUser(d);
 228                         break;
 229                         case UCMODE_VOICE:
 230                                 n->first->DelVoicedUser(d);
 231                         break;
 232                 }
 233                 return d->nick;
 234         }
 235         return "";
 236 }
 237
 238 void ModeParser::DisplayCurrentModes(userrec *user, userrec* targetuser, chanrec* targetchannel, const char* text)
 239 {
 240         if (targetchannel)
 241         {
 242                 /* Display channel's current mode string */
 243                 user->WriteServ("324 %s %s +%s",user->nick, targetchannel->name, targetchannel->ChanModes(targetchannel->HasUser(user)));
 244                 user->WriteServ("329 %s %s %lu", user->nick, targetchannel->name, (unsigned long)targetchannel->age);
 245                 return;
 246         }
 247         else if (targetuser)
 248         {
 249                 if ((targetuser == user) || (*user->oper))
 250                 {
 251                         /* Display user's current mode string */
 252                         user->WriteServ("221 %s :+%s",targetuser->nick,targetuser->FormatModes());
 253                         if (*targetuser->oper)
 254                                 user->WriteServ("008 %s +%s :Server notice mask", targetuser->nick, targetuser->FormatNoticeMasks());
 255                         return;
 256                 }
 257                 else
 258                 {
 259                         user->WriteServ("502 %s :Can't change mode for other users", user->nick);
 260                         return;
 261                 }
 262         }
 263
 264         /* No such nick/channel */
 265         user->WriteServ("401 %s %s :No such nick/channel",user->nick, text);
 266         return;
 267 }
 268
 269 void ModeParser::Process(const char** parameters, int pcnt, userrec *user, bool servermode)
 270 {
 271         std::string target = parameters[0];
 272         ModeType type = MODETYPE_USER;
 273         unsigned char mask = 0;
 274         chanrec* targetchannel = ServerInstance->FindChan(parameters[0]);
 275         userrec* targetuser  = ServerInstance->FindNick(parameters[0]);
 276
 277         LastParse = "";
 278
 279         /* Special case for displaying the list for listmodes,
 280          * e.g. MODE #chan b, or MODE #chan +b without a parameter
 281          */
 282         if ((targetchannel) && (pcnt == 2))
 283         {
 284                 const char* mode = parameters[1];
 285                 int nonlistmodes_found = 0;
 286
 287                 mask = MASK_CHANNEL;
 288
 289                 while (mode && *mode)
 290                 {
 291                         if (*mode == '+')
 292                         {
 293                                 mode++;
 294                                 continue;
 295                         }
 296
 297                         if (ServerInstance->Config->HideModeLists && (targetchannel->GetStatus(user) < STATUS_HOP))
 298                         {
 299                                 user->WriteServ("482 %s %s :Only half-operators and above may view the +%c list",user->nick, targetchannel->name, *mode++);
 300                                 continue;
 301                         }
 302
 303                         ModeHandler *mh = this->FindMode(*mode, MODETYPE_CHANNEL);
 304                         bool display = true;
 305
 306                         if ((mh) && (mh->IsListMode()))
 307                         {
 308                                 /** See below for a description of what craq this is :D
 309                                  */
 310                                 unsigned char handler_id = (*mode - 65) | mask;
 311
 312                                 for(ModeWatchIter watchers = modewatchers[handler_id].begin(); watchers != modewatchers[handler_id].end(); watchers++)
 313                                 {
 314                                         std::string dummyparam;
 315
 316                                         if (!((*watchers)->BeforeMode(user, NULL, targetchannel, dummyparam, true, MODETYPE_CHANNEL)))
 317                                                 display = false;
 318                                 }
 319
 320                                 if (display)
 321                                         mh->DisplayList(user, targetchannel);
 322                         }
 323                         else
 324                                 nonlistmodes_found++;
 325
 326                         mode++;
 327                 }
 328
 329                 /* We didnt have any modes that were non-list, we can return here */
 330                 if (!nonlistmodes_found)
 331                         return;
 332         }
 333
 334         if (pcnt == 1)
 335         {
 336                 this->DisplayCurrentModes(user, targetuser, targetchannel, parameters[0]);
 337         }
 338         else if (pcnt > 1)
 339         {
 340                 if (targetchannel)
 341                 {
 342                         type = MODETYPE_CHANNEL;
 343                         mask = MASK_CHANNEL;
 344
 345                         /* Extra security checks on channel modes
 346                          * (e.g. are they a (half)op?
 347                          */
 348
 349                         if ((IS_LOCAL(user)) && (targetchannel->GetStatus(user) < STATUS_HOP))
 350                         {
 351                                 /* We don't have halfop */
 352                                 int MOD_RESULT = 0;
 353                                 FOREACH_RESULT(I_OnAccessCheck,OnAccessCheck(user, NULL, targetchannel, AC_GENERAL_MODE));
 354                                 if (MOD_RESULT == ACR_DENY)
 355                                         return;
 356
 357                                 if (MOD_RESULT == ACR_DEFAULT)
 358                                 {
 359                                         /* Are we a uline or is it a servermode? */
 360                                         if ((!ServerInstance->ULine(user->server)) && (!servermode))
 361                                         {
 362                                                 /* Not enough permission:
 363                                                  * NOT a uline and NOT a servermode,
 364                                                  * OR, NOT halfop or above.
 365                                                  */
 366                                                 user->WriteServ("482 %s %s :You're not a channel (half)operator",user->nick, targetchannel->name);
 367                                                 return;
 368                                         }
 369                                 }
 370                         }
 371                 }
 372                 else if (targetuser)
 373                 {
 374                         type = MODETYPE_USER;
 375                         mask = MASK_USER;
 376                         if ((user != targetuser) && (!ServerInstance->ULine(user->server)))
 377                         {
 378                                 user->WriteServ("502 %s :Can't change mode for other users", user->nick);
 379                                 return;
 380                         }
 381                 }
 382                 else
 383                 {
 384                         /* No such nick/channel */
 385                         user->WriteServ("401 %s %s :No such nick/channel",user->nick, parameters[0]);
 386                         return;
 387                 }
 388
 389                 std::string mode_sequence = parameters[1];
 390                 std::string parameter = "";
 391                 std::ostringstream parameter_list;
 392                 std::string output_sequence = "";
 393                 bool adding = true, state_change = false;
 394                 unsigned char handler_id = 0;
 395                 int parameter_counter = 2; /* Index of first parameter */
 396                 int parameter_count = 0;
 397                 bool last_successful_state_change = false;
 398
 399                 /* A mode sequence that doesnt start with + or -. Assume +. - Thanks for the suggestion spike (bug#132) */
 400                 if ((*mode_sequence.begin() != '+') && (*mode_sequence.begin() != '-'))
 401                         mode_sequence.insert(0, "+");
 402
 403                 for (std::string::const_iterator letter = mode_sequence.begin(); letter != mode_sequence.end(); letter++)
 404                 {
 405                         unsigned char modechar = *letter;
 406
 407                         switch (modechar)
 408                         {
 409                                 /* NB:
 410                                  * For + and - mode characters, we don't just stick the character into the output sequence.
 411                                  * This is because the user may do something dumb, like: +-+ooo or +oo-+. To prevent this
 412                                  * appearing in the output sequence, we store a flag which says there was a state change,
 413                                  * which is set on any + or -, however, the + or - that we finish on is only appended to
 414                                  * the output stream in the event it is followed by a non "+ or -" character, such as o or v.
 415                                  */
 416                                 case '+':
 417                                         /* The following expression prevents: +o+o nick nick, compressing it to +oo nick nick,
 418                                          * however, will allow the + if it is the first item in the sequence, regardless.
 419                                          */
 420                                         if ((!adding) || (!output_sequence.length()))
 421                                                 state_change = true;
 422                                         adding = true;
 423                                         if (!output_sequence.length())
 424                                                 last_successful_state_change = false;
 425                                         continue;
 426                                 break;
 427                                 case '-':
 428                                         if ((adding) || (!output_sequence.length()))
 429                                                 state_change = true;
 430                                         adding = false;
 431                                         if (!output_sequence.length())
 432                                                 last_successful_state_change = true;
 433                                         continue;
 434                                 break;
 435                                 default:
 436
 437                                         /**
 438                                          * Watch carefully for the sleight of hand trick.
 439                                          * 65 is the ascii value of 'A'. We take this from
 440                                          * the char we're looking at to get a number between
 441                                          * 1 and 127. We then logic-or it to get the hashed
 442                                          * position, dependent on wether its a channel or
 443                                          * a user mode. This is a little stranger, but a lot
 444                                          * faster, than using a map of pairs.
 445                                          */
 446                                         handler_id = (modechar - 65) | mask;
 447
 448                                         if (modehandlers[handler_id])
 449                                         {
 450                                                 bool abort = false;
 451
 452                                                 if (modehandlers[handler_id]->GetModeType() == type)
 453                                                 {
 454                                                         if (modehandlers[handler_id]->GetNumParams(adding))
 455                                                         {
 456                                                                 /* This mode expects a parameter, do we have any parameters left in our list to use? */
 457                                                                 if (parameter_counter < pcnt)
 458                                                                 {
 459                                                                         parameter = parameters[parameter_counter++];
 460
 461                                                                         /* Yerk, invalid! */
 462                                                                         if ((parameter.find(':') == 0) || (parameter.rfind(' ') != std::string::npos))
 463                                                                                 parameter = "";
 464                                                                 }
 465                                                                 else
 466                                                                 {
 467                                                                         /* No parameter, continue to the next mode */
 468                                                                         continue;
 469                                                                 }
 470
 471                                                                 bool had_parameter = !parameter.empty();
 472
 473                                                                 for (ModeWatchIter watchers = modewatchers[handler_id].begin(); watchers != modewatchers[handler_id].end(); watchers++)
 474                                                                 {
 475                                                                         if ((*watchers)->BeforeMode(user, targetuser, targetchannel, parameter, adding, type) == false)
 476                                                                         {
 477                                                                                 abort = true;
 478                                                                                 break;
 479                                                                         }
 480                                                                         /* A module whacked the parameter completely, and there was one. abort. */
 481                                                                         if ((had_parameter) && (parameter.empty()))
 482                                                                         {
 483                                                                                 abort = true;
 484                                                                                 break;
 485                                                                         }
 486                                                                 }
 487
 488                                                                 if (abort)
 489                                                                         continue;
 490                                                         }
 491
 492                                                         /* It's an oper only mode, check if theyre an oper. If they arent,
 493                                                          * eat any parameter that  came with the mode, and continue to next
 494                                                          */
 495                                                         if ((IS_LOCAL(user)) && (modehandlers[handler_id]->NeedsOper()) && (!*user->oper))
 496                                                         {
 497                                                                 user->WriteServ("481 %s :Permission Denied- Only IRC operators may %sset %s mode %c", user->nick,
 498                                                                                 adding ? "" : "un", type == MODETYPE_CHANNEL ? "channel" : "user",
 499                                                                                 modehandlers[handler_id]->GetModeChar());
 500                                                                 continue;
 501                                                         }
 502
 503                                                         /* Call the handler for the mode */
 504                                                         ModeAction ma = modehandlers[handler_id]->OnModeChange(user, targetuser, targetchannel, parameter, adding);
 505
 506                                                         if ((modehandlers[handler_id]->GetNumParams(adding)) && (parameter == ""))
 507                                                         {
 508                                                                 /* The handler nuked the parameter and they are supposed to have one.
 509                                                                  * We CANT continue now, even if they actually returned MODEACTION_ALLOW,
 510                                                                  * so we bail to the next mode character.
 511                                                                  */
 512                                                                 continue;
 513                                                         }
 514
 515                                                         if (ma == MODEACTION_ALLOW)
 516                                                         {
 517                                                                 /* We're about to output a valid mode letter - was there previously a pending state-change? */
 518                                                                 if (state_change)
 519                                                                 {
 520                                                                         if (adding != last_successful_state_change)
 521                                                                                 output_sequence.append(adding ? "+" : "-");
 522                                                                         last_successful_state_change = adding;
 523                                                                 }
 524
 525                                                                 /* Add the mode letter */
 526                                                                 output_sequence.push_back(modechar);
 527
 528                                                                 /* Is there a valid parameter for this mode? If so add it to the parameter list */
 529                                                                 if ((modehandlers[handler_id]->GetNumParams(adding)) && (parameter != ""))
 530                                                                 {
 531                                                                         parameter_list << " " << parameter;
 532                                                                         parameter_count++;
 533                                                                         /* Does this mode have a prefix? */
 534                                                                         if (modehandlers[handler_id]->GetPrefix() && targetchannel)
 535                                                                         {
 536                                                                                 userrec* user_to_prefix = ServerInstance->FindNick(parameter);
 537                                                                                 if (user_to_prefix)
 538                                                                                         targetchannel->SetPrefix(user_to_prefix, modehandlers[handler_id]->GetPrefix(),
 539                                                                                                         modehandlers[handler_id]->GetPrefixRank(), adding);
 540                                                                         }
 541                                                                 }
 542
 543                                                                 /* Call all the AfterMode events in the mode watchers for this mode */
 544                                                                 for (ModeWatchIter watchers = modewatchers[handler_id].begin(); watchers != modewatchers[handler_id].end(); watchers++)
 545                                                                         (*watchers)->AfterMode(user, targetuser, targetchannel, parameter, adding, type);
 546
 547                                                                 /* Reset the state change flag */
 548                                                                 state_change = false;
 549
 550                                                                 if ((output_sequence.length() + parameter_list.str().length() > 450) || (output_sequence.length() > 100)
 551                                                                                 || (parameter_count > MAXMODES))
 552                                                                 {
 553                                                                         /* We cant have a mode sequence this long */
 554                                                                         letter = mode_sequence.end() - 1;
 555                                                                         continue;
 556                                                                 }
 557                                                         }
 558                                                 }
 559                                         }
 560                                         else
 561                                         {
 562                                                 /* No mode handler? Unknown mode character then. */
 563                                                 user->WriteServ("472 %s %c :is unknown mode char to me",user->nick, modechar);
 564                                         }
 565                                 break;
 566                         }
 567                 }
 568                 /* Was there at least one valid mode in the sequence? */
 569                 if (output_sequence != "")
 570                 {
 571                         if (servermode)
 572                         {
 573                                 if (type == MODETYPE_CHANNEL)
 574                                 {
 575                                         targetchannel->WriteChannelWithServ(ServerInstance->Config->ServerName, "MODE %s %s%s", targetchannel->name, output_sequence.c_str(), parameter_list.str().c_str());
 576                                         this->LastParse = targetchannel->name;
 577                                 }
 578                                 else
 579                                 {
 580                                         targetuser->WriteServ("MODE %s %s%s",targetuser->nick,output_sequence.c_str(), parameter_list.str().c_str());
 581                                         this->LastParse = targetuser->nick;
 582                                 }
 583                         }
 584                         else
 585                         {
 586                                 if (type == MODETYPE_CHANNEL)
 587                                 {
 588                                         targetchannel->WriteChannel(user,"MODE %s %s%s",targetchannel->name,output_sequence.c_str(),parameter_list.str().c_str());
 589                                         FOREACH_MOD(I_OnMode,OnMode(user, targetchannel, TYPE_CHANNEL, output_sequence + parameter_list.str()));
 590                                         this->LastParse = targetchannel->name;
 591                                 }
 592                                 else
 593                                 {
 594                                         user->WriteTo(targetuser,"MODE %s %s%s",targetuser->nick,output_sequence.c_str(), parameter_list.str().c_str());
 595                                         FOREACH_MOD(I_OnMode,OnMode(user, targetuser, TYPE_USER, output_sequence + parameter_list.str()));
 596                                         this->LastParse = targetuser->nick;
 597                                 }
 598                         }
 599
 600                         LastParse.append(" ");
 601                         LastParse.append(output_sequence);
 602                         LastParse.append(parameter_list.str());
 603                 }
 604         }
 605 }
 606
 607 const std::string& ModeParser::GetLastParse()
 608 {
 609         return LastParse;
 610 }
 611
 612 void ModeParser::CleanMask(std::string &mask)
 613 {
 614         std::string::size_type pos_of_pling = mask.find_first_of('!');
 615         std::string::size_type pos_of_at = mask.find_first_of('@');
 616         std::string::size_type pos_of_dot = mask.find_first_of('.');
 617         std::string::size_type pos_of_colon = mask.find_first_of(':'); /* Because ipv6 addresses are colon delimited */
 618
 619         if ((pos_of_pling == std::string::npos) && (pos_of_at == std::string::npos))
 620         {
 621                 /* Just a nick, or just a host */
 622                 if ((pos_of_dot == std::string::npos) && (pos_of_colon == std::string::npos))
 623                 {
 624                         /* It has no '.' in it, it must be a nick. */
 625                         mask.append("!*@*");
 626                 }
 627                 else
 628                 {
 629                         /* Got a dot in it? Has to be a host */
 630                         mask = "*!*@" + mask;
 631                 }
 632         }
 633         else if ((pos_of_pling == std::string::npos) && (pos_of_at != std::string::npos))
 634         {
 635                 /* Has an @ but no !, its a user@host */
 636                  mask = "*!" + mask;
 637         }
 638         else if ((pos_of_pling != std::string::npos) && (pos_of_at == std::string::npos))
 639         {
 640                 /* Has a ! but no @, it must be a nick!ident */
 641                 mask.append("@*");
 642         }
 643 }
 644
 645 bool ModeParser::AddMode(ModeHandler* mh, unsigned const char modeletter)
 646 {
 647         unsigned char mask = 0;
 648         unsigned char pos = 0;
 649
 650         /* Yes, i know, this might let people declare modes like '_' or '^'.
 651          * If they do that, thats their problem, and if i ever EVER see an
 652          * official InspIRCd developer do that, i'll beat them with a paddle!
 653          */
 654         if ((mh->GetModeChar() < 'A') || (mh->GetModeChar() > 'z'))
 655                 return false;
 656
 657         /* A mode prefix of ',' is not acceptable, it would fuck up server to server.
 658          * A mode prefix of ':' will fuck up both server to server, and client to server.
 659          * A mode prefix of '#' will mess up /whois and /privmsg
 660          */
 661         if ((mh->GetPrefix() == ',') || (mh->GetPrefix() == ':') || (mh->GetPrefix() == '#'))
 662                 return false;
 663
 664         mh->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
 665         pos = (mh->GetModeChar()-65) | mask;
 666
 667         if (modehandlers[pos])
 668                 return false;
 669
 670         modehandlers[pos] = mh;
 671         return true;
 672 }
 673
 674 bool ModeParser::DelMode(ModeHandler* mh)
 675 {
 676         unsigned char mask = 0;
 677         unsigned char pos = 0;
 678
 679         if ((mh->GetModeChar() < 'A') || (mh->GetModeChar() > 'z'))
 680                 return false;
 681
 682         mh->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
 683         pos = (mh->GetModeChar()-65) | mask;
 684
 685         if (!modehandlers[pos])
 686                 return false;
 687
 688         switch (mh->GetModeType())
 689         {
 690                 case MODETYPE_USER:
 691                         for (user_hash::iterator i = ServerInstance->clientlist->begin(); i != ServerInstance->clientlist->end(); i++)
 692                         {
 693                                 mh->RemoveMode(i->second);
 694                         }
 695                 break;
 696                 case MODETYPE_CHANNEL:
 697                         for (chan_hash::iterator i = ServerInstance->chanlist->begin(); i != ServerInstance->chanlist->end(); i++)
 698                         {
 699                                 mh->RemoveMode(i->second);
 700                         }
 701                 break;
 702         }
 703
 704         modehandlers[pos] = NULL;
 705
 706         return true;
 707 }
 708
 709 ModeHandler* ModeParser::FindMode(unsigned const char modeletter, ModeType mt)
 710 {
 711         unsigned char mask = 0;
 712         unsigned char pos = 0;
 713
 714         if ((modeletter < 'A') || (modeletter > 'z'))
 715                 return NULL;
 716
 717         mt == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
 718         pos = (modeletter-65) | mask;
 719
 720         return modehandlers[pos];
 721 }
 722
 723 std::string ModeParser::UserModeList()
 724 {
 725         char modestr[256];
 726         int pointer = 0;
 727
 728         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 729         {
 730                 unsigned char pos = (mode-65) | MASK_USER;
 731
 732                 if (modehandlers[pos])
 733                         modestr[pointer++] = mode;
 734         }
 735         modestr[pointer++] = 0;
 736         return modestr;
 737 }
 738
 739 std::string ModeParser::ChannelModeList()
 740 {
 741         char modestr[256];
 742         int pointer = 0;
 743
 744         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 745         {
 746                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 747
 748                 if (modehandlers[pos])
 749                         modestr[pointer++] = mode;
 750         }
 751         modestr[pointer++] = 0;
 752         return modestr;
 753 }
 754
 755 std::string ModeParser::ParaModeList()
 756 {
 757         char modestr[256];
 758         int pointer = 0;
 759
 760         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 761         {
 762                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 763
 764                 if ((modehandlers[pos]) && (modehandlers[pos]->GetNumParams(true)))
 765                         modestr[pointer++] = mode;
 766         }
 767         modestr[pointer++] = 0;
 768         return modestr;
 769 }
 770
 771 ModeHandler* ModeParser::FindPrefix(unsigned const char pfxletter)
 772 {
 773         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 774         {
 775                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 776
 777                 if ((modehandlers[pos]) && (modehandlers[pos]->GetPrefix() == pfxletter))
 778                 {
 779                         return modehandlers[pos];
 780                 }
 781         }
 782         return NULL;
 783 }
 784
 785 std::string ModeParser::ModeString(userrec* user, chanrec* channel)
 786 {
 787         std::string types;
 788         std::string pars;
 789
 790         if (!channel || !user)
 791                 return "";
 792
 793         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 794         {
 795                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 796                 ModeHandler* mh = modehandlers[pos];
 797                 if ((mh) && (mh->GetNumParams(true)) && (mh->GetNumParams(false)))
 798                 {
 799                         ModePair ret;
 800                         ret = mh->ModeSet(NULL, user, channel, user->nick);
 801                         if ((ret.first) && (ret.second == user->nick))
 802                         {
 803                                 pars.append(" ");
 804                                 pars.append(user->nick);
 805                                 types.push_back(mh->GetModeChar());
 806                         }
 807                 }
 808         }
 809
 810         return types+pars;
 811 }
 812
 813 std::string ModeParser::ChanModes()
 814 {
 815         std::string type1;      /* Listmodes EXCEPT those with a prefix */
 816         std::string type2;      /* Modes that take a param when adding or removing */
 817         std::string type3;      /* Modes that only take a param when adding */
 818         std::string type4;      /* Modes that dont take a param */
 819
 820         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 821         {
 822                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 823                  /* One parameter when adding */
 824                 if (modehandlers[pos])
 825                 {
 826                         if (modehandlers[pos]->GetNumParams(true))
 827                         {
 828                                 if ((modehandlers[pos]->IsListMode()) && (!modehandlers[pos]->GetPrefix()))
 829                                 {
 830                                         type1 += modehandlers[pos]->GetModeChar();
 831                                 }
 832                                 else
 833                                 {
 834                                         /* ... and one parameter when removing */
 835                                         if (modehandlers[pos]->GetNumParams(false))
 836                                         {
 837                                                 /* But not a list mode */
 838                                                 if (!modehandlers[pos]->GetPrefix())
 839                                                 {
 840                                                         type2 += modehandlers[pos]->GetModeChar();
 841                                                 }
 842                                         }
 843                                         else
 844                                         {
 845                                                 /* No parameters when removing */
 846                                                 type3 += modehandlers[pos]->GetModeChar();
 847                                         }
 848                                 }
 849                         }
 850                         else
 851                         {
 852                                 type4 += modehandlers[pos]->GetModeChar();
 853                         }
 854                 }
 855
 856         }
 857
 858         return type1 + "," + type2 + "," + type3 + "," + type4;
 859 }
 860
 861 bool ModeParser::PrefixComparison(const prefixtype one, const prefixtype two)
 862 {
 863         return one.second > two.second;
 864 }
 865
 866 std::string ModeParser::BuildPrefixes()
 867 {
 868         std::string mletters = "";
 869         std::string mprefixes = "";
 870         pfxcontainer pfx;
 871         std::map<char,char> prefix_to_mode;
 872
 873         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 874         {
 875                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 876
 877                 if ((modehandlers[pos]) && (modehandlers[pos]->GetPrefix()))
 878                 {
 879                         pfx.push_back(std::make_pair<char,unsigned int>(modehandlers[pos]->GetPrefix(), modehandlers[pos]->GetPrefixRank()));
 880                         prefix_to_mode[modehandlers[pos]->GetPrefix()] = modehandlers[pos]->GetModeChar();
 881                 }
 882         }
 883
 884         sort(pfx.begin(), pfx.end(), ModeParser::PrefixComparison);
 885
 886         for (pfxcontainer::iterator n = pfx.begin(); n != pfx.end(); n++)
 887         {
 888                 mletters = mletters + n->first;
 889                 mprefixes = mprefixes + prefix_to_mode.find(n->first)->second;
 890         }
 891
 892         return "(" + mprefixes + ")" + mletters;
 893 }
 894
 895 bool ModeParser::AddModeWatcher(ModeWatcher* mw)
 896 {
 897         unsigned char mask = 0;
 898         unsigned char pos = 0;
 899
 900         if (!mw)
 901                 return false;
 902
 903         if ((mw->GetModeChar() < 'A') || (mw->GetModeChar() > 'z'))
 904                 return false;
 905
 906         mw->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
 907         pos = (mw->GetModeChar()-65) | mask;
 908
 909         modewatchers[pos].push_back(mw);
 910         return true;
 911 }
 912
 913 bool ModeParser::DelModeWatcher(ModeWatcher* mw)
 914 {
 915         unsigned char mask = 0;
 916         unsigned char pos = 0;
 917
 918         if (!mw)
 919                 return false;
 920
 921         if ((mw->GetModeChar() < 'A') || (mw->GetModeChar() > 'z'))
 922                 return false;
 923
 924         mw->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
 925         pos = (mw->GetModeChar()-65) | mask;
 926
 927         ModeWatchIter a = find(modewatchers[pos].begin(),modewatchers[pos].end(),mw);
 928
 929         if (a == modewatchers[pos].end())
 930         {
 931                 return false;
 932         }
 933
 934         modewatchers[pos].erase(a);
 935
 936         return true;
 937 }
 938
 939 /** This default implementation can remove simple user modes
 940  */
 941 void ModeHandler::RemoveMode(userrec* user)
 942 {
 943         char moderemove[MAXBUF];
 944         const char* parameters[] = { user->nick, moderemove };
 945
 946         if (user->IsModeSet(this->GetModeChar()))
 947         {
 948                 sprintf(moderemove,"-%c",this->GetModeChar());
 949                 ServerInstance->Parser->CallHandler("MODE", parameters, 2, user);
 950         }
 951 }
 952
 953 /** This default implementation can remove simple channel modes
 954  * (no parameters)
 955  */
 956 void ModeHandler::RemoveMode(chanrec* channel)
 957 {
 958         char moderemove[MAXBUF];
 959         const char* parameters[] = { channel->name, moderemove };
 960
 961         if (channel->IsModeSet(this->GetModeChar()))
 962         {
 963                 userrec* n = new userrec(ServerInstance);
 964
 965                 sprintf(moderemove,"-%c",this->GetModeChar());
 966                 n->SetFd(FD_MAGIC_NUMBER);
 967
 968                 ServerInstance->SendMode(parameters, 2, n);
 969
 970                 delete n;
 971         }
 972 }
 973
 974 ModeParser::ModeParser(InspIRCd* Instance) : ServerInstance(Instance)
 975 {
 976         struct Initializer
 977         {
 978                 char modechar;
 979                 ModeHandler* handler;
 980         };
 981
 982         Initializer modes[] = {
 983                 { 's', new ModeChannelSecret(Instance) },
 984                 { 'p', new ModeChannelPrivate(Instance) },
 985                 { 'm', new ModeChannelModerated(Instance) },
 986                 { 't', new ModeChannelTopicOps(Instance) },
 987                 { 'n', new ModeChannelNoExternal(Instance) },
 988                 { 'i', new ModeChannelInviteOnly(Instance) },
 989                 { 'k', new ModeChannelKey(Instance) },
 990                 { 'l', new ModeChannelLimit(Instance) },
 991                 { 'b', new ModeChannelBan(Instance) },
 992                 { 'o', new ModeChannelOp(Instance) },
 993                 { 'h', new ModeChannelHalfOp(Instance) },
 994                 { 'v', new ModeChannelVoice(Instance) },
 995                 { 's', new ModeUserServerNotice(Instance) },
 996                 { 'w', new ModeUserWallops(Instance) },
 997                 { 'i', new ModeUserInvisible(Instance) },
 998                 { 'o', new ModeUserOperator(Instance) },
 999                 { 'n', new ModeUserServerNoticeMask(Instance) },
1000                 { 0, NULL }
1001         };
1002
1003         /* Clear mode list */
1004         memset(modehandlers, 0, sizeof(modehandlers));
1005         memset(modewatchers, 0, sizeof(modewatchers));
1006
1007         /* Last parse string */
1008         LastParse = "";
1009
1010         /* Initialise the RFC mode letters */
1011         for (int index = 0; modes[index].modechar; index++)
1012                 this->AddMode(modes[index].handler, modes[index].modechar);
1013 }