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                         ModeHandler *mh = this->FindMode(*mode, MODETYPE_CHANNEL);
 298                         bool display = true;
 299
 300                         if ((mh) && (mh->IsListMode()))
 301                         {
 302                                 /** See below for a description of what craq this is :D
 303                                  */
 304                                 unsigned char handler_id = (*mode - 65) | mask;
 305
 306                                 for(ModeWatchIter watchers = modewatchers[handler_id].begin(); watchers != modewatchers[handler_id].end(); watchers++)
 307                                 {
 308                                         std::string dummyparam;
 309
 310                                         if (!((*watchers)->BeforeMode(user, NULL, targetchannel, dummyparam, true, MODETYPE_CHANNEL)))
 311                                                 display = false;
 312                                 }
 313
 314                                 if (display)
 315                                         mh->DisplayList(user, targetchannel);
 316                         }
 317                         else
 318                                 nonlistmodes_found++;
 319
 320                         mode++;
 321                 }
 322
 323                 /* We didnt have any modes that were non-list, we can return here */
 324                 if (!nonlistmodes_found)
 325                         return;
 326         }
 327
 328         if (pcnt == 1)
 329         {
 330                 this->DisplayCurrentModes(user, targetuser, targetchannel, parameters[0]);
 331         }
 332         else if (pcnt > 1)
 333         {
 334                 if (targetchannel)
 335                 {
 336                         type = MODETYPE_CHANNEL;
 337                         mask = MASK_CHANNEL;
 338
 339                         /* Extra security checks on channel modes
 340                          * (e.g. are they a (half)op?
 341                          */
 342
 343                         if ((IS_LOCAL(user)) && (targetchannel->GetStatus(user) < STATUS_HOP))
 344                         {
 345                                 /* We don't have halfop */
 346                                 int MOD_RESULT = 0;
 347                                 FOREACH_RESULT(I_OnAccessCheck,OnAccessCheck(user, NULL, targetchannel, AC_GENERAL_MODE));
 348                                 if (MOD_RESULT == ACR_DENY)
 349                                         return;
 350
 351                                 if (MOD_RESULT == ACR_DEFAULT)
 352                                 {
 353                                         /* Are we a uline or is it a servermode? */
 354                                         if ((!ServerInstance->ULine(user->server)) && (!servermode))
 355                                         {
 356                                                 /* Not enough permission:
 357                                                  * NOT a uline and NOT a servermode,
 358                                                  * OR, NOT halfop or above.
 359                                                  */
 360                                                 user->WriteServ("482 %s %s :You're not a channel (half)operator",user->nick, targetchannel->name);
 361                                                 return;
 362                                         }
 363                                 }
 364                         }
 365                 }
 366                 else if (targetuser)
 367                 {
 368                         type = MODETYPE_USER;
 369                         mask = MASK_USER;
 370                         if ((user != targetuser) && (!ServerInstance->ULine(user->server)))
 371                         {
 372                                 user->WriteServ("502 %s :Can't change mode for other users", user->nick);
 373                                 return;
 374                         }
 375                 }
 376                 else
 377                 {
 378                         /* No such nick/channel */
 379                         user->WriteServ("401 %s %s :No such nick/channel",user->nick, parameters[0]);
 380                         return;
 381                 }
 382
 383                 std::string mode_sequence = parameters[1];
 384                 std::string parameter = "";
 385                 std::ostringstream parameter_list;
 386                 std::string output_sequence = "";
 387                 bool adding = true, state_change = false;
 388                 unsigned char handler_id = 0;
 389                 int parameter_counter = 2; /* Index of first parameter */
 390                 int parameter_count = 0;
 391                 bool last_successful_state_change = false;
 392
 393                 /* A mode sequence that doesnt start with + or -. Assume +. - Thanks for the suggestion spike (bug#132) */
 394                 if ((*mode_sequence.begin() != '+') && (*mode_sequence.begin() != '-'))
 395                         mode_sequence.insert(0, "+");
 396
 397                 for (std::string::const_iterator letter = mode_sequence.begin(); letter != mode_sequence.end(); letter++)
 398                 {
 399                         unsigned char modechar = *letter;
 400
 401                         switch (modechar)
 402                         {
 403                                 /* NB:
 404                                  * For + and - mode characters, we don't just stick the character into the output sequence.
 405                                  * This is because the user may do something dumb, like: +-+ooo or +oo-+. To prevent this
 406                                  * appearing in the output sequence, we store a flag which says there was a state change,
 407                                  * which is set on any + or -, however, the + or - that we finish on is only appended to
 408                                  * the output stream in the event it is followed by a non "+ or -" character, such as o or v.
 409                                  */
 410                                 case '+':
 411                                         /* The following expression prevents: +o+o nick nick, compressing it to +oo nick nick,
 412                                          * however, will allow the + if it is the first item in the sequence, regardless.
 413                                          */
 414                                         if ((!adding) || (!output_sequence.length()))
 415                                                 state_change = true;
 416                                         adding = true;
 417                                         if (!output_sequence.length())
 418                                                 last_successful_state_change = false;
 419                                         continue;
 420                                 break;
 421                                 case '-':
 422                                         if ((adding) || (!output_sequence.length()))
 423                                                 state_change = true;
 424                                         adding = false;
 425                                         if (!output_sequence.length())
 426                                                 last_successful_state_change = true;
 427                                         continue;
 428                                 break;
 429                                 default:
 430
 431                                         /**
 432                                          * Watch carefully for the sleight of hand trick.
 433                                          * 65 is the ascii value of 'A'. We take this from
 434                                          * the char we're looking at to get a number between
 435                                          * 1 and 127. We then logic-or it to get the hashed
 436                                          * position, dependent on wether its a channel or
 437                                          * a user mode. This is a little stranger, but a lot
 438                                          * faster, than using a map of pairs.
 439                                          */
 440                                         handler_id = (modechar - 65) | mask;
 441
 442                                         if (modehandlers[handler_id])
 443                                         {
 444                                                 bool abort = false;
 445
 446                                                 if (modehandlers[handler_id]->GetModeType() == type)
 447                                                 {
 448                                                         if (modehandlers[handler_id]->GetNumParams(adding))
 449                                                         {
 450                                                                 /* This mode expects a parameter, do we have any parameters left in our list to use? */
 451                                                                 if (parameter_counter < pcnt)
 452                                                                 {
 453                                                                         parameter = parameters[parameter_counter++];
 454
 455                                                                         /* Yerk, invalid! */
 456                                                                         if ((parameter.find(':') == 0) || (parameter.rfind(' ') != std::string::npos))
 457                                                                                 parameter = "";
 458                                                                 }
 459                                                                 else
 460                                                                 {
 461                                                                         /* No parameter, continue to the next mode */
 462                                                                         continue;
 463                                                                 }
 464
 465                                                                 bool had_parameter = !parameter.empty();
 466
 467                                                                 for (ModeWatchIter watchers = modewatchers[handler_id].begin(); watchers != modewatchers[handler_id].end(); watchers++)
 468                                                                 {
 469                                                                         if ((*watchers)->BeforeMode(user, targetuser, targetchannel, parameter, adding, type) == false)
 470                                                                         {
 471                                                                                 abort = true;
 472                                                                                 break;
 473                                                                         }
 474                                                                         /* A module whacked the parameter completely, and there was one. abort. */
 475                                                                         if ((had_parameter) && (parameter.empty()))
 476                                                                         {
 477                                                                                 abort = true;
 478                                                                                 break;
 479                                                                         }
 480                                                                 }
 481
 482                                                                 if (abort)
 483                                                                         continue;
 484                                                         }
 485
 486                                                         /* It's an oper only mode, check if theyre an oper. If they arent,
 487                                                          * eat any parameter that  came with the mode, and continue to next
 488                                                          */
 489                                                         if ((IS_LOCAL(user)) && (modehandlers[handler_id]->NeedsOper()) && (!*user->oper))
 490                                                         {
 491                                                                 user->WriteServ("481 %s :Permission Denied- Only IRC operators may %sset %s mode %c", user->nick,
 492                                                                                 adding ? "" : "un", type == MODETYPE_CHANNEL ? "channel" : "user",
 493                                                                                 modehandlers[handler_id]->GetModeChar());
 494                                                                 continue;
 495                                                         }
 496
 497                                                         /* Call the handler for the mode */
 498                                                         ModeAction ma = modehandlers[handler_id]->OnModeChange(user, targetuser, targetchannel, parameter, adding);
 499
 500                                                         if ((modehandlers[handler_id]->GetNumParams(adding)) && (parameter == ""))
 501                                                         {
 502                                                                 /* The handler nuked the parameter and they are supposed to have one.
 503                                                                  * We CANT continue now, even if they actually returned MODEACTION_ALLOW,
 504                                                                  * so we bail to the next mode character.
 505                                                                  */
 506                                                                 continue;
 507                                                         }
 508
 509                                                         if (ma == MODEACTION_ALLOW)
 510                                                         {
 511                                                                 /* We're about to output a valid mode letter - was there previously a pending state-change? */
 512                                                                 if (state_change)
 513                                                                 {
 514                                                                         if (adding != last_successful_state_change)
 515                                                                                 output_sequence.append(adding ? "+" : "-");
 516                                                                         last_successful_state_change = adding;
 517                                                                 }
 518
 519                                                                 /* Add the mode letter */
 520                                                                 output_sequence.push_back(modechar);
 521
 522                                                                 /* Is there a valid parameter for this mode? If so add it to the parameter list */
 523                                                                 if ((modehandlers[handler_id]->GetNumParams(adding)) && (parameter != ""))
 524                                                                 {
 525                                                                         parameter_list << " " << parameter;
 526                                                                         parameter_count++;
 527                                                                         /* Does this mode have a prefix? */
 528                                                                         if (modehandlers[handler_id]->GetPrefix() && targetchannel)
 529                                                                         {
 530                                                                                 userrec* user_to_prefix = ServerInstance->FindNick(parameter);
 531                                                                                 if (user_to_prefix)
 532                                                                                         targetchannel->SetPrefix(user_to_prefix, modehandlers[handler_id]->GetPrefix(),
 533                                                                                                         modehandlers[handler_id]->GetPrefixRank(), adding);
 534                                                                         }
 535                                                                 }
 536
 537                                                                 /* Call all the AfterMode events in the mode watchers for this mode */
 538                                                                 for (ModeWatchIter watchers = modewatchers[handler_id].begin(); watchers != modewatchers[handler_id].end(); watchers++)
 539                                                                         (*watchers)->AfterMode(user, targetuser, targetchannel, parameter, adding, type);
 540
 541                                                                 /* Reset the state change flag */
 542                                                                 state_change = false;
 543
 544                                                                 if ((output_sequence.length() + parameter_list.str().length() > 450) || (output_sequence.length() > 100)
 545                                                                                 || (parameter_count > MAXMODES))
 546                                                                 {
 547                                                                         /* We cant have a mode sequence this long */
 548                                                                         letter = mode_sequence.end() - 1;
 549                                                                         continue;
 550                                                                 }
 551                                                         }
 552                                                 }
 553                                         }
 554                                         else
 555                                         {
 556                                                 /* No mode handler? Unknown mode character then. */
 557                                                 user->WriteServ("472 %s %c :is unknown mode char to me",user->nick, modechar);
 558                                         }
 559                                 break;
 560                         }
 561                 }
 562                 /* Was there at least one valid mode in the sequence? */
 563                 if (output_sequence != "")
 564                 {
 565                         if (servermode)
 566                         {
 567                                 if (type == MODETYPE_CHANNEL)
 568                                 {
 569                                         targetchannel->WriteChannelWithServ(ServerInstance->Config->ServerName, "MODE %s %s%s", targetchannel->name, output_sequence.c_str(), parameter_list.str().c_str());
 570                                         this->LastParse = targetchannel->name;
 571                                 }
 572                                 else
 573                                 {
 574                                         targetuser->WriteServ("MODE %s %s%s",targetuser->nick,output_sequence.c_str(), parameter_list.str().c_str());
 575                                         this->LastParse = targetuser->nick;
 576                                 }
 577                         }
 578                         else
 579                         {
 580                                 if (type == MODETYPE_CHANNEL)
 581                                 {
 582                                         targetchannel->WriteChannel(user,"MODE %s %s%s",targetchannel->name,output_sequence.c_str(),parameter_list.str().c_str());
 583                                         FOREACH_MOD(I_OnMode,OnMode(user, targetchannel, TYPE_CHANNEL, output_sequence + parameter_list.str()));
 584                                         this->LastParse = targetchannel->name;
 585                                 }
 586                                 else
 587                                 {
 588                                         user->WriteTo(targetuser,"MODE %s %s%s",targetuser->nick,output_sequence.c_str(), parameter_list.str().c_str());
 589                                         FOREACH_MOD(I_OnMode,OnMode(user, targetuser, TYPE_USER, output_sequence + parameter_list.str()));
 590                                         this->LastParse = targetuser->nick;
 591                                 }
 592                         }
 593
 594                         LastParse.append(" ");
 595                         LastParse.append(output_sequence);
 596                         LastParse.append(parameter_list.str());
 597                 }
 598         }
 599 }
 600
 601 const std::string& ModeParser::GetLastParse()
 602 {
 603         return LastParse;
 604 }
 605
 606 void ModeParser::CleanMask(std::string &mask)
 607 {
 608         std::string::size_type pos_of_pling = mask.find_first_of('!');
 609         std::string::size_type pos_of_at = mask.find_first_of('@');
 610         std::string::size_type pos_of_dot = mask.find_first_of('.');
 611         std::string::size_type pos_of_colon = mask.find_first_of(':'); /* Because ipv6 addresses are colon delimited */
 612
 613         if ((pos_of_pling == std::string::npos) && (pos_of_at == std::string::npos))
 614         {
 615                 /* Just a nick, or just a host */
 616                 if ((pos_of_dot == std::string::npos) && (pos_of_colon == std::string::npos))
 617                 {
 618                         /* It has no '.' in it, it must be a nick. */
 619                         mask.append("!*@*");
 620                 }
 621                 else
 622                 {
 623                         /* Got a dot in it? Has to be a host */
 624                         mask = "*!*@" + mask;
 625                 }
 626         }
 627         else if ((pos_of_pling == std::string::npos) && (pos_of_at != std::string::npos))
 628         {
 629                 /* Has an @ but no !, its a user@host */
 630                  mask = "*!" + mask;
 631         }
 632         else if ((pos_of_pling != std::string::npos) && (pos_of_at == std::string::npos))
 633         {
 634                 /* Has a ! but no @, it must be a nick!ident */
 635                 mask.append("@*");
 636         }
 637 }
 638
 639 bool ModeParser::AddMode(ModeHandler* mh, unsigned const char modeletter)
 640 {
 641         unsigned char mask = 0;
 642         unsigned char pos = 0;
 643
 644         /* Yes, i know, this might let people declare modes like '_' or '^'.
 645          * If they do that, thats their problem, and if i ever EVER see an
 646          * official InspIRCd developer do that, i'll beat them with a paddle!
 647          */
 648         if ((mh->GetModeChar() < 'A') || (mh->GetModeChar() > 'z'))
 649                 return false;
 650
 651         /* A mode prefix of ',' is not acceptable, it would fuck up server to server.
 652          * A mode prefix of ':' will fuck up both server to server, and client to server.
 653          * A mode prefix of '#' will mess up /whois and /privmsg
 654          */
 655         if ((mh->GetPrefix() == ',') || (mh->GetPrefix() == ':') || (mh->GetPrefix() == '#'))
 656                 return false;
 657
 658         mh->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
 659         pos = (mh->GetModeChar()-65) | mask;
 660
 661         if (modehandlers[pos])
 662                 return false;
 663
 664         modehandlers[pos] = mh;
 665         return true;
 666 }
 667
 668 bool ModeParser::DelMode(ModeHandler* mh)
 669 {
 670         unsigned char mask = 0;
 671         unsigned char pos = 0;
 672
 673         if ((mh->GetModeChar() < 'A') || (mh->GetModeChar() > 'z'))
 674                 return false;
 675
 676         mh->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
 677         pos = (mh->GetModeChar()-65) | mask;
 678
 679         if (!modehandlers[pos])
 680                 return false;
 681
 682         switch (mh->GetModeType())
 683         {
 684                 case MODETYPE_USER:
 685                         for (user_hash::iterator i = ServerInstance->clientlist->begin(); i != ServerInstance->clientlist->end(); i++)
 686                         {
 687                                 mh->RemoveMode(i->second);
 688                         }
 689                 break;
 690                 case MODETYPE_CHANNEL:
 691                         for (chan_hash::iterator i = ServerInstance->chanlist->begin(); i != ServerInstance->chanlist->end(); i++)
 692                         {
 693                                 mh->RemoveMode(i->second);
 694                         }
 695                 break;
 696         }
 697
 698         modehandlers[pos] = NULL;
 699
 700         return true;
 701 }
 702
 703 ModeHandler* ModeParser::FindMode(unsigned const char modeletter, ModeType mt)
 704 {
 705         unsigned char mask = 0;
 706         unsigned char pos = 0;
 707
 708         if ((modeletter < 'A') || (modeletter > 'z'))
 709                 return NULL;
 710
 711         mt == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
 712         pos = (modeletter-65) | mask;
 713
 714         return modehandlers[pos];
 715 }
 716
 717 std::string ModeParser::UserModeList()
 718 {
 719         char modestr[256];
 720         int pointer = 0;
 721
 722         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 723         {
 724                 unsigned char pos = (mode-65) | MASK_USER;
 725
 726                 if (modehandlers[pos])
 727                         modestr[pointer++] = mode;
 728         }
 729         modestr[pointer++] = 0;
 730         return modestr;
 731 }
 732
 733 std::string ModeParser::ChannelModeList()
 734 {
 735         char modestr[256];
 736         int pointer = 0;
 737
 738         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 739         {
 740                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 741
 742                 if (modehandlers[pos])
 743                         modestr[pointer++] = mode;
 744         }
 745         modestr[pointer++] = 0;
 746         return modestr;
 747 }
 748
 749 std::string ModeParser::ParaModeList()
 750 {
 751         char modestr[256];
 752         int pointer = 0;
 753
 754         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 755         {
 756                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 757
 758                 if ((modehandlers[pos]) && (modehandlers[pos]->GetNumParams(true)))
 759                         modestr[pointer++] = mode;
 760         }
 761         modestr[pointer++] = 0;
 762         return modestr;
 763 }
 764
 765 ModeHandler* ModeParser::FindPrefix(unsigned const char pfxletter)
 766 {
 767         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 768         {
 769                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 770
 771                 if ((modehandlers[pos]) && (modehandlers[pos]->GetPrefix() == pfxletter))
 772                 {
 773                         return modehandlers[pos];
 774                 }
 775         }
 776         return NULL;
 777 }
 778
 779 std::string ModeParser::ModeString(userrec* user, chanrec* channel)
 780 {
 781         std::string types;
 782         std::string pars;
 783
 784         if (!channel || !user)
 785                 return "";
 786
 787         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 788         {
 789                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 790                 ModeHandler* mh = modehandlers[pos];
 791                 if ((mh) && (mh->GetNumParams(true)) && (mh->GetNumParams(false)))
 792                 {
 793                         ModePair ret;
 794                         ret = mh->ModeSet(NULL, user, channel, user->nick);
 795                         if ((ret.first) && (ret.second == user->nick))
 796                         {
 797                                 pars.append(" ");
 798                                 pars.append(user->nick);
 799                                 types.push_back(mh->GetModeChar());
 800                         }
 801                 }
 802         }
 803
 804         return types+pars;
 805 }
 806
 807 std::string ModeParser::ChanModes()
 808 {
 809         std::string type1;      /* Listmodes EXCEPT those with a prefix */
 810         std::string type2;      /* Modes that take a param when adding or removing */
 811         std::string type3;      /* Modes that only take a param when adding */
 812         std::string type4;      /* Modes that dont take a param */
 813
 814         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 815         {
 816                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 817                  /* One parameter when adding */
 818                 if (modehandlers[pos])
 819                 {
 820                         if (modehandlers[pos]->GetNumParams(true))
 821                         {
 822                                 if ((modehandlers[pos]->IsListMode()) && (!modehandlers[pos]->GetPrefix()))
 823                                 {
 824                                         type1 += modehandlers[pos]->GetModeChar();
 825                                 }
 826                                 else
 827                                 {
 828                                         /* ... and one parameter when removing */
 829                                         if (modehandlers[pos]->GetNumParams(false))
 830                                         {
 831                                                 /* But not a list mode */
 832                                                 if (!modehandlers[pos]->GetPrefix())
 833                                                 {
 834                                                         type2 += modehandlers[pos]->GetModeChar();
 835                                                 }
 836                                         }
 837                                         else
 838                                         {
 839                                                 /* No parameters when removing */
 840                                                 type3 += modehandlers[pos]->GetModeChar();
 841                                         }
 842                                 }
 843                         }
 844                         else
 845                         {
 846                                 type4 += modehandlers[pos]->GetModeChar();
 847                         }
 848                 }
 849
 850         }
 851
 852         return type1 + "," + type2 + "," + type3 + "," + type4;
 853 }
 854
 855 bool ModeParser::PrefixComparison(const prefixtype one, const prefixtype two)
 856 {
 857         return one.second > two.second;
 858 }
 859
 860 std::string ModeParser::BuildPrefixes()
 861 {
 862         std::string mletters = "";
 863         std::string mprefixes = "";
 864         pfxcontainer pfx;
 865         std::map<char,char> prefix_to_mode;
 866
 867         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 868         {
 869                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 870
 871                 if ((modehandlers[pos]) && (modehandlers[pos]->GetPrefix()))
 872                 {
 873                         pfx.push_back(std::make_pair<char,unsigned int>(modehandlers[pos]->GetPrefix(), modehandlers[pos]->GetPrefixRank()));
 874                         prefix_to_mode[modehandlers[pos]->GetPrefix()] = modehandlers[pos]->GetModeChar();
 875                 }
 876         }
 877
 878         sort(pfx.begin(), pfx.end(), ModeParser::PrefixComparison);
 879
 880         for (pfxcontainer::iterator n = pfx.begin(); n != pfx.end(); n++)
 881         {
 882                 mletters = mletters + n->first;
 883                 mprefixes = mprefixes + prefix_to_mode.find(n->first)->second;
 884         }
 885
 886         return "(" + mprefixes + ")" + mletters;
 887 }
 888
 889 bool ModeParser::AddModeWatcher(ModeWatcher* mw)
 890 {
 891         unsigned char mask = 0;
 892         unsigned char pos = 0;
 893
 894         if (!mw)
 895                 return false;
 896
 897         if ((mw->GetModeChar() < 'A') || (mw->GetModeChar() > 'z'))
 898                 return false;
 899
 900         mw->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
 901         pos = (mw->GetModeChar()-65) | mask;
 902
 903         modewatchers[pos].push_back(mw);
 904         return true;
 905 }
 906
 907 bool ModeParser::DelModeWatcher(ModeWatcher* mw)
 908 {
 909         unsigned char mask = 0;
 910         unsigned char pos = 0;
 911
 912         if (!mw)
 913                 return false;
 914
 915         if ((mw->GetModeChar() < 'A') || (mw->GetModeChar() > 'z'))
 916                 return false;
 917
 918         mw->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
 919         pos = (mw->GetModeChar()-65) | mask;
 920
 921         ModeWatchIter a = find(modewatchers[pos].begin(),modewatchers[pos].end(),mw);
 922
 923         if (a == modewatchers[pos].end())
 924         {
 925                 return false;
 926         }
 927
 928         modewatchers[pos].erase(a);
 929
 930         return true;
 931 }
 932
 933 /** This default implementation can remove simple user modes
 934  */
 935 void ModeHandler::RemoveMode(userrec* user)
 936 {
 937         char moderemove[MAXBUF];
 938         const char* parameters[] = { user->nick, moderemove };
 939
 940         if (user->IsModeSet(this->GetModeChar()))
 941         {
 942                 sprintf(moderemove,"-%c",this->GetModeChar());
 943                 ServerInstance->Parser->CallHandler("MODE", parameters, 2, user);
 944         }
 945 }
 946
 947 /** This default implementation can remove simple channel modes
 948  * (no parameters)
 949  */
 950 void ModeHandler::RemoveMode(chanrec* channel)
 951 {
 952         char moderemove[MAXBUF];
 953         const char* parameters[] = { channel->name, moderemove };
 954
 955         if (channel->IsModeSet(this->GetModeChar()))
 956         {
 957                 userrec* n = new userrec(ServerInstance);
 958
 959                 sprintf(moderemove,"-%c",this->GetModeChar());
 960                 n->SetFd(FD_MAGIC_NUMBER);
 961
 962                 ServerInstance->SendMode(parameters, 2, n);
 963
 964                 delete n;
 965         }
 966 }
 967
 968 ModeParser::ModeParser(InspIRCd* Instance) : ServerInstance(Instance)
 969 {
 970         struct Initializer
 971         {
 972                 char modechar;
 973                 ModeHandler* handler;
 974         };
 975
 976         Initializer modes[] = {
 977                 { 's', new ModeChannelSecret(Instance) },
 978                 { 'p', new ModeChannelPrivate(Instance) },
 979                 { 'm', new ModeChannelModerated(Instance) },
 980                 { 't', new ModeChannelTopicOps(Instance) },
 981                 { 'n', new ModeChannelNoExternal(Instance) },
 982                 { 'i', new ModeChannelInviteOnly(Instance) },
 983                 { 'k', new ModeChannelKey(Instance) },
 984                 { 'l', new ModeChannelLimit(Instance) },
 985                 { 'b', new ModeChannelBan(Instance) },
 986                 { 'o', new ModeChannelOp(Instance) },
 987                 { 'h', new ModeChannelHalfOp(Instance) },
 988                 { 'v', new ModeChannelVoice(Instance) },
 989                 { 's', new ModeUserServerNotice(Instance) },
 990                 { 'w', new ModeUserWallops(Instance) },
 991                 { 'i', new ModeUserInvisible(Instance) },
 992                 { 'o', new ModeUserOperator(Instance) },
 993                 { 'n', new ModeUserServerNoticeMask(Instance) },
 994                 { 0, NULL }
 995         };
 996
 997         /* Clear mode list */
 998         memset(modehandlers, 0, sizeof(modehandlers));
 999         memset(modewatchers, 0, sizeof(modewatchers));
1000
1001         /* Last parse string */
1002         LastParse = "";
1003
1004         /* Initialise the RFC mode letters */
1005         for (int index = 0; modes[index].modechar; index++)
1006                 this->AddMode(modes[index].handler, modes[index].modechar);
1007 }