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                 bool sent[256];
 287
 288                 mask = MASK_CHANNEL;
 289
 290                 memset(&sent, 0, 256);
 291
 292                 while (mode && *mode)
 293                 {
 294                         unsigned char mletter = *mode;
 295
 296                         if (*mode == '+')
 297                         {
 298                                 mode++;
 299                                 continue;
 300                         }
 301
 302                         /* Ensure the user doesnt request the same mode twice,
 303                          * so they cant flood themselves off out of idiocy.
 304                          */
 305                         if (!sent[mletter])
 306                         {
 307                                 sent[mletter] = true;
 308                         }
 309                         else
 310                         {
 311                                 mode++;
 312                                 continue;
 313                         }
 314
 315                         ModeHandler *mh = this->FindMode(*mode, MODETYPE_CHANNEL);
 316                         bool display = true;
 317
 318                         if ((mh) && (mh->IsListMode()))
 319                         {
 320                                 if (ServerInstance->Config->HideModeLists[mletter] && (targetchannel->GetStatus(user) < STATUS_HOP))
 321                                 {
 322                                         user->WriteServ("482 %s %s :Only half-operators and above may view the +%c list",user->nick, targetchannel->name, *mode++);
 323                                         continue;
 324                                 }
 325
 326                                 /** See below for a description of what craq this is :D
 327                                  */
 328                                 unsigned char handler_id = (*mode - 65) | mask;
 329
 330                                 for(ModeWatchIter watchers = modewatchers[handler_id].begin(); watchers != modewatchers[handler_id].end(); watchers++)
 331                                 {
 332                                         std::string dummyparam;
 333
 334                                         if (!((*watchers)->BeforeMode(user, NULL, targetchannel, dummyparam, true, MODETYPE_CHANNEL)))
 335                                                 display = false;
 336                                 }
 337
 338                                 if (display)
 339                                         mh->DisplayList(user, targetchannel);
 340                         }
 341                         else
 342                                 nonlistmodes_found++;
 343
 344                         mode++;
 345                 }
 346
 347                 /* We didnt have any modes that were non-list, we can return here */
 348                 if (!nonlistmodes_found)
 349                         return;
 350         }
 351
 352         if (pcnt == 1)
 353         {
 354                 this->DisplayCurrentModes(user, targetuser, targetchannel, parameters[0]);
 355         }
 356         else if (pcnt > 1)
 357         {
 358                 if (targetchannel)
 359                 {
 360                         type = MODETYPE_CHANNEL;
 361                         mask = MASK_CHANNEL;
 362
 363                         /* Extra security checks on channel modes
 364                          * (e.g. are they a (half)op?
 365                          */
 366
 367                         if ((IS_LOCAL(user)) && (targetchannel->GetStatus(user) < STATUS_HOP))
 368                         {
 369                                 /* We don't have halfop */
 370                                 int MOD_RESULT = 0;
 371                                 FOREACH_RESULT(I_OnAccessCheck,OnAccessCheck(user, NULL, targetchannel, AC_GENERAL_MODE));
 372                                 if (MOD_RESULT == ACR_DENY)
 373                                         return;
 374
 375                                 if (MOD_RESULT == ACR_DEFAULT)
 376                                 {
 377                                         /* Are we a uline or is it a servermode? */
 378                                         if ((!ServerInstance->ULine(user->server)) && (!servermode))
 379                                         {
 380                                                 /* Not enough permission:
 381                                                  * NOT a uline and NOT a servermode,
 382                                                  * OR, NOT halfop or above.
 383                                                  */
 384                                                 user->WriteServ("482 %s %s :You're not a channel (half)operator",user->nick, targetchannel->name);
 385                                                 return;
 386                                         }
 387                                 }
 388                         }
 389                 }
 390                 else if (targetuser)
 391                 {
 392                         type = MODETYPE_USER;
 393                         mask = MASK_USER;
 394                         if ((user != targetuser) && (!ServerInstance->ULine(user->server)))
 395                         {
 396                                 user->WriteServ("502 %s :Can't change mode for other users", user->nick);
 397                                 return;
 398                         }
 399                 }
 400                 else
 401                 {
 402                         /* No such nick/channel */
 403                         user->WriteServ("401 %s %s :No such nick/channel",user->nick, parameters[0]);
 404                         return;
 405                 }
 406
 407                 std::string mode_sequence = parameters[1];
 408                 std::string parameter = "";
 409                 std::ostringstream parameter_list;
 410                 std::string output_sequence = "";
 411                 bool adding = true, state_change = false;
 412                 unsigned char handler_id = 0;
 413                 int parameter_counter = 2; /* Index of first parameter */
 414                 int parameter_count = 0;
 415                 bool last_successful_state_change = false;
 416
 417                 /* A mode sequence that doesnt start with + or -. Assume +. - Thanks for the suggestion spike (bug#132) */
 418                 if ((*mode_sequence.begin() != '+') && (*mode_sequence.begin() != '-'))
 419                         mode_sequence.insert(0, "+");
 420
 421                 for (std::string::const_iterator letter = mode_sequence.begin(); letter != mode_sequence.end(); letter++)
 422                 {
 423                         unsigned char modechar = *letter;
 424
 425                         switch (modechar)
 426                         {
 427                                 /* NB:
 428                                  * For + and - mode characters, we don't just stick the character into the output sequence.
 429                                  * This is because the user may do something dumb, like: +-+ooo or +oo-+. To prevent this
 430                                  * appearing in the output sequence, we store a flag which says there was a state change,
 431                                  * which is set on any + or -, however, the + or - that we finish on is only appended to
 432                                  * the output stream in the event it is followed by a non "+ or -" character, such as o or v.
 433                                  */
 434                                 case '+':
 435                                         /* The following expression prevents: +o+o nick nick, compressing it to +oo nick nick,
 436                                          * however, will allow the + if it is the first item in the sequence, regardless.
 437                                          */
 438                                         if ((!adding) || (!output_sequence.length()))
 439                                                 state_change = true;
 440                                         adding = true;
 441                                         if (!output_sequence.length())
 442                                                 last_successful_state_change = false;
 443                                         continue;
 444                                 break;
 445                                 case '-':
 446                                         if ((adding) || (!output_sequence.length()))
 447                                                 state_change = true;
 448                                         adding = false;
 449                                         if (!output_sequence.length())
 450                                                 last_successful_state_change = true;
 451                                         continue;
 452                                 break;
 453                                 default:
 454
 455                                         /**
 456                                          * Watch carefully for the sleight of hand trick.
 457                                          * 65 is the ascii value of 'A'. We take this from
 458                                          * the char we're looking at to get a number between
 459                                          * 1 and 127. We then logic-or it to get the hashed
 460                                          * position, dependent on wether its a channel or
 461                                          * a user mode. This is a little stranger, but a lot
 462                                          * faster, than using a map of pairs.
 463                                          */
 464                                         handler_id = (modechar - 65) | mask;
 465
 466                                         if (modehandlers[handler_id])
 467                                         {
 468                                                 bool abort = false;
 469
 470                                                 if (modehandlers[handler_id]->GetModeType() == type)
 471                                                 {
 472                                                         if (modehandlers[handler_id]->GetNumParams(adding))
 473                                                         {
 474                                                                 /* This mode expects a parameter, do we have any parameters left in our list to use? */
 475                                                                 if (parameter_counter < pcnt)
 476                                                                 {
 477                                                                         parameter = parameters[parameter_counter++];
 478
 479                                                                         /* Yerk, invalid! */
 480                                                                         if ((parameter.find(':') == 0) || (parameter.rfind(' ') != std::string::npos))
 481                                                                                 parameter = "";
 482                                                                 }
 483                                                                 else
 484                                                                 {
 485                                                                         /* No parameter, continue to the next mode */
 486                                                                         continue;
 487                                                                 }
 488
 489                                                                 bool had_parameter = !parameter.empty();
 490
 491                                                                 for (ModeWatchIter watchers = modewatchers[handler_id].begin(); watchers != modewatchers[handler_id].end(); watchers++)
 492                                                                 {
 493                                                                         if ((*watchers)->BeforeMode(user, targetuser, targetchannel, parameter, adding, type) == false)
 494                                                                         {
 495                                                                                 abort = true;
 496                                                                                 break;
 497                                                                         }
 498                                                                         /* A module whacked the parameter completely, and there was one. abort. */
 499                                                                         if ((had_parameter) && (parameter.empty()))
 500                                                                         {
 501                                                                                 abort = true;
 502                                                                                 break;
 503                                                                         }
 504                                                                 }
 505
 506                                                                 if (abort)
 507                                                                         continue;
 508                                                         }
 509
 510                                                         /* It's an oper only mode, check if theyre an oper. If they arent,
 511                                                          * eat any parameter that  came with the mode, and continue to next
 512                                                          */
 513                                                         if ((IS_LOCAL(user)) && (modehandlers[handler_id]->NeedsOper()) && (!*user->oper))
 514                                                         {
 515                                                                 user->WriteServ("481 %s :Permission Denied- Only IRC operators may %sset %s mode %c", user->nick,
 516                                                                                 adding ? "" : "un", type == MODETYPE_CHANNEL ? "channel" : "user",
 517                                                                                 modehandlers[handler_id]->GetModeChar());
 518                                                                 continue;
 519                                                         }
 520
 521                                                         /* Call the handler for the mode */
 522                                                         ModeAction ma = modehandlers[handler_id]->OnModeChange(user, targetuser, targetchannel, parameter, adding);
 523
 524                                                         if ((modehandlers[handler_id]->GetNumParams(adding)) && (parameter == ""))
 525                                                         {
 526                                                                 /* The handler nuked the parameter and they are supposed to have one.
 527                                                                  * We CANT continue now, even if they actually returned MODEACTION_ALLOW,
 528                                                                  * so we bail to the next mode character.
 529                                                                  */
 530                                                                 continue;
 531                                                         }
 532
 533                                                         if (ma == MODEACTION_ALLOW)
 534                                                         {
 535                                                                 /* We're about to output a valid mode letter - was there previously a pending state-change? */
 536                                                                 if (state_change)
 537                                                                 {
 538                                                                         if (adding != last_successful_state_change)
 539                                                                                 output_sequence.append(adding ? "+" : "-");
 540                                                                         last_successful_state_change = adding;
 541                                                                 }
 542
 543                                                                 /* Add the mode letter */
 544                                                                 output_sequence.push_back(modechar);
 545
 546                                                                 /* Is there a valid parameter for this mode? If so add it to the parameter list */
 547                                                                 if ((modehandlers[handler_id]->GetNumParams(adding)) && (parameter != ""))
 548                                                                 {
 549                                                                         parameter_list << " " << parameter;
 550                                                                         parameter_count++;
 551                                                                         /* Does this mode have a prefix? */
 552                                                                         if (modehandlers[handler_id]->GetPrefix() && targetchannel)
 553                                                                         {
 554                                                                                 userrec* user_to_prefix = ServerInstance->FindNick(parameter);
 555                                                                                 if (user_to_prefix)
 556                                                                                         targetchannel->SetPrefix(user_to_prefix, modehandlers[handler_id]->GetPrefix(),
 557                                                                                                         modehandlers[handler_id]->GetPrefixRank(), adding);
 558                                                                         }
 559                                                                 }
 560
 561                                                                 /* Call all the AfterMode events in the mode watchers for this mode */
 562                                                                 for (ModeWatchIter watchers = modewatchers[handler_id].begin(); watchers != modewatchers[handler_id].end(); watchers++)
 563                                                                         (*watchers)->AfterMode(user, targetuser, targetchannel, parameter, adding, type);
 564
 565                                                                 /* Reset the state change flag */
 566                                                                 state_change = false;
 567
 568                                                                 if ((output_sequence.length() + parameter_list.str().length() > 450) || (output_sequence.length() > 100)
 569                                                                                 || (parameter_count > MAXMODES))
 570                                                                 {
 571                                                                         /* We cant have a mode sequence this long */
 572                                                                         letter = mode_sequence.end() - 1;
 573                                                                         continue;
 574                                                                 }
 575                                                         }
 576                                                 }
 577                                         }
 578                                         else
 579                                         {
 580                                                 /* No mode handler? Unknown mode character then. */
 581                                                 user->WriteServ("472 %s %c :is unknown mode char to me",user->nick, modechar);
 582                                         }
 583                                 break;
 584                         }
 585                 }
 586                 /* Was there at least one valid mode in the sequence? */
 587                 if (output_sequence != "")
 588                 {
 589                         if (servermode)
 590                         {
 591                                 if (type == MODETYPE_CHANNEL)
 592                                 {
 593                                         targetchannel->WriteChannelWithServ(ServerInstance->Config->ServerName, "MODE %s %s%s", targetchannel->name, output_sequence.c_str(), parameter_list.str().c_str());
 594                                         this->LastParse = targetchannel->name;
 595                                 }
 596                                 else
 597                                 {
 598                                         targetuser->WriteServ("MODE %s %s%s",targetuser->nick,output_sequence.c_str(), parameter_list.str().c_str());
 599                                         this->LastParse = targetuser->nick;
 600                                 }
 601                         }
 602                         else
 603                         {
 604                                 if (type == MODETYPE_CHANNEL)
 605                                 {
 606                                         targetchannel->WriteChannel(user,"MODE %s %s%s",targetchannel->name,output_sequence.c_str(),parameter_list.str().c_str());
 607                                         FOREACH_MOD(I_OnMode,OnMode(user, targetchannel, TYPE_CHANNEL, output_sequence + parameter_list.str()));
 608                                         this->LastParse = targetchannel->name;
 609                                 }
 610                                 else
 611                                 {
 612                                         user->WriteTo(targetuser,"MODE %s %s%s",targetuser->nick,output_sequence.c_str(), parameter_list.str().c_str());
 613                                         FOREACH_MOD(I_OnMode,OnMode(user, targetuser, TYPE_USER, output_sequence + parameter_list.str()));
 614                                         this->LastParse = targetuser->nick;
 615                                 }
 616                         }
 617
 618                         LastParse.append(" ");
 619                         LastParse.append(output_sequence);
 620                         LastParse.append(parameter_list.str());
 621                 }
 622         }
 623 }
 624
 625 const std::string& ModeParser::GetLastParse()
 626 {
 627         return LastParse;
 628 }
 629
 630 void ModeParser::CleanMask(std::string &mask)
 631 {
 632         std::string::size_type pos_of_pling = mask.find_first_of('!');
 633         std::string::size_type pos_of_at = mask.find_first_of('@');
 634         std::string::size_type pos_of_dot = mask.find_first_of('.');
 635         std::string::size_type pos_of_colon = mask.find_first_of(':'); /* Because ipv6 addresses are colon delimited */
 636
 637         if ((pos_of_pling == std::string::npos) && (pos_of_at == std::string::npos))
 638         {
 639                 /* Just a nick, or just a host */
 640                 if ((pos_of_dot == std::string::npos) && (pos_of_colon == std::string::npos))
 641                 {
 642                         /* It has no '.' in it, it must be a nick. */
 643                         mask.append("!*@*");
 644                 }
 645                 else
 646                 {
 647                         /* Got a dot in it? Has to be a host */
 648                         mask = "*!*@" + mask;
 649                 }
 650         }
 651         else if ((pos_of_pling == std::string::npos) && (pos_of_at != std::string::npos))
 652         {
 653                 /* Has an @ but no !, its a user@host */
 654                  mask = "*!" + mask;
 655         }
 656         else if ((pos_of_pling != std::string::npos) && (pos_of_at == std::string::npos))
 657         {
 658                 /* Has a ! but no @, it must be a nick!ident */
 659                 mask.append("@*");
 660         }
 661 }
 662
 663 bool ModeParser::AddMode(ModeHandler* mh, unsigned const char modeletter)
 664 {
 665         unsigned char mask = 0;
 666         unsigned char pos = 0;
 667
 668         /* Yes, i know, this might let people declare modes like '_' or '^'.
 669          * If they do that, thats their problem, and if i ever EVER see an
 670          * official InspIRCd developer do that, i'll beat them with a paddle!
 671          */
 672         if ((mh->GetModeChar() < 'A') || (mh->GetModeChar() > 'z'))
 673                 return false;
 674
 675         /* A mode prefix of ',' is not acceptable, it would fuck up server to server.
 676          * A mode prefix of ':' will fuck up both server to server, and client to server.
 677          * A mode prefix of '#' will mess up /whois and /privmsg
 678          */
 679         if ((mh->GetPrefix() == ',') || (mh->GetPrefix() == ':') || (mh->GetPrefix() == '#'))
 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         modehandlers[pos] = mh;
 689         return true;
 690 }
 691
 692 bool ModeParser::DelMode(ModeHandler* mh)
 693 {
 694         unsigned char mask = 0;
 695         unsigned char pos = 0;
 696
 697         if ((mh->GetModeChar() < 'A') || (mh->GetModeChar() > 'z'))
 698                 return false;
 699
 700         mh->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
 701         pos = (mh->GetModeChar()-65) | mask;
 702
 703         if (!modehandlers[pos])
 704                 return false;
 705
 706         switch (mh->GetModeType())
 707         {
 708                 case MODETYPE_USER:
 709                         for (user_hash::iterator i = ServerInstance->clientlist->begin(); i != ServerInstance->clientlist->end(); i++)
 710                         {
 711                                 mh->RemoveMode(i->second);
 712                         }
 713                 break;
 714                 case MODETYPE_CHANNEL:
 715                         for (chan_hash::iterator i = ServerInstance->chanlist->begin(); i != ServerInstance->chanlist->end(); i++)
 716                         {
 717                                 mh->RemoveMode(i->second);
 718                         }
 719                 break;
 720         }
 721
 722         modehandlers[pos] = NULL;
 723
 724         return true;
 725 }
 726
 727 ModeHandler* ModeParser::FindMode(unsigned const char modeletter, ModeType mt)
 728 {
 729         unsigned char mask = 0;
 730         unsigned char pos = 0;
 731
 732         if ((modeletter < 'A') || (modeletter > 'z'))
 733                 return NULL;
 734
 735         mt == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
 736         pos = (modeletter-65) | mask;
 737
 738         return modehandlers[pos];
 739 }
 740
 741 std::string ModeParser::UserModeList()
 742 {
 743         char modestr[256];
 744         int pointer = 0;
 745
 746         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 747         {
 748                 unsigned char pos = (mode-65) | MASK_USER;
 749
 750                 if (modehandlers[pos])
 751                         modestr[pointer++] = mode;
 752         }
 753         modestr[pointer++] = 0;
 754         return modestr;
 755 }
 756
 757 std::string ModeParser::ChannelModeList()
 758 {
 759         char modestr[256];
 760         int pointer = 0;
 761
 762         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 763         {
 764                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 765
 766                 if (modehandlers[pos])
 767                         modestr[pointer++] = mode;
 768         }
 769         modestr[pointer++] = 0;
 770         return modestr;
 771 }
 772
 773 std::string ModeParser::ParaModeList()
 774 {
 775         char modestr[256];
 776         int pointer = 0;
 777
 778         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 779         {
 780                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 781
 782                 if ((modehandlers[pos]) && (modehandlers[pos]->GetNumParams(true)))
 783                         modestr[pointer++] = mode;
 784         }
 785         modestr[pointer++] = 0;
 786         return modestr;
 787 }
 788
 789 ModeHandler* ModeParser::FindPrefix(unsigned const char pfxletter)
 790 {
 791         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 792         {
 793                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 794
 795                 if ((modehandlers[pos]) && (modehandlers[pos]->GetPrefix() == pfxletter))
 796                 {
 797                         return modehandlers[pos];
 798                 }
 799         }
 800         return NULL;
 801 }
 802
 803 std::string ModeParser::ModeString(userrec* user, chanrec* channel)
 804 {
 805         std::string types;
 806         std::string pars;
 807
 808         if (!channel || !user)
 809                 return "";
 810
 811         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 812         {
 813                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 814                 ModeHandler* mh = modehandlers[pos];
 815                 if ((mh) && (mh->GetNumParams(true)) && (mh->GetNumParams(false)))
 816                 {
 817                         ModePair ret;
 818                         ret = mh->ModeSet(NULL, user, channel, user->nick);
 819                         if ((ret.first) && (ret.second == user->nick))
 820                         {
 821                                 pars.append(" ");
 822                                 pars.append(user->nick);
 823                                 types.push_back(mh->GetModeChar());
 824                         }
 825                 }
 826         }
 827
 828         return types+pars;
 829 }
 830
 831 std::string ModeParser::ChanModes()
 832 {
 833         std::string type1;      /* Listmodes EXCEPT those with a prefix */
 834         std::string type2;      /* Modes that take a param when adding or removing */
 835         std::string type3;      /* Modes that only take a param when adding */
 836         std::string type4;      /* Modes that dont take a param */
 837
 838         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 839         {
 840                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 841                  /* One parameter when adding */
 842                 if (modehandlers[pos])
 843                 {
 844                         if (modehandlers[pos]->GetNumParams(true))
 845                         {
 846                                 if ((modehandlers[pos]->IsListMode()) && (!modehandlers[pos]->GetPrefix()))
 847                                 {
 848                                         type1 += modehandlers[pos]->GetModeChar();
 849                                 }
 850                                 else
 851                                 {
 852                                         /* ... and one parameter when removing */
 853                                         if (modehandlers[pos]->GetNumParams(false))
 854                                         {
 855                                                 /* But not a list mode */
 856                                                 if (!modehandlers[pos]->GetPrefix())
 857                                                 {
 858                                                         type2 += modehandlers[pos]->GetModeChar();
 859                                                 }
 860                                         }
 861                                         else
 862                                         {
 863                                                 /* No parameters when removing */
 864                                                 type3 += modehandlers[pos]->GetModeChar();
 865                                         }
 866                                 }
 867                         }
 868                         else
 869                         {
 870                                 type4 += modehandlers[pos]->GetModeChar();
 871                         }
 872                 }
 873
 874         }
 875
 876         return type1 + "," + type2 + "," + type3 + "," + type4;
 877 }
 878
 879 bool ModeParser::PrefixComparison(const prefixtype one, const prefixtype two)
 880 {
 881         return one.second > two.second;
 882 }
 883
 884 std::string ModeParser::BuildPrefixes()
 885 {
 886         std::string mletters = "";
 887         std::string mprefixes = "";
 888         pfxcontainer pfx;
 889         std::map<char,char> prefix_to_mode;
 890
 891         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 892         {
 893                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 894
 895                 if ((modehandlers[pos]) && (modehandlers[pos]->GetPrefix()))
 896                 {
 897                         pfx.push_back(std::make_pair<char,unsigned int>(modehandlers[pos]->GetPrefix(), modehandlers[pos]->GetPrefixRank()));
 898                         prefix_to_mode[modehandlers[pos]->GetPrefix()] = modehandlers[pos]->GetModeChar();
 899                 }
 900         }
 901
 902         sort(pfx.begin(), pfx.end(), ModeParser::PrefixComparison);
 903
 904         for (pfxcontainer::iterator n = pfx.begin(); n != pfx.end(); n++)
 905         {
 906                 mletters = mletters + n->first;
 907                 mprefixes = mprefixes + prefix_to_mode.find(n->first)->second;
 908         }
 909
 910         return "(" + mprefixes + ")" + mletters;
 911 }
 912
 913 bool ModeParser::AddModeWatcher(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         modewatchers[pos].push_back(mw);
 928         return true;
 929 }
 930
 931 bool ModeParser::DelModeWatcher(ModeWatcher* mw)
 932 {
 933         unsigned char mask = 0;
 934         unsigned char pos = 0;
 935
 936         if (!mw)
 937                 return false;
 938
 939         if ((mw->GetModeChar() < 'A') || (mw->GetModeChar() > 'z'))
 940                 return false;
 941
 942         mw->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
 943         pos = (mw->GetModeChar()-65) | mask;
 944
 945         ModeWatchIter a = find(modewatchers[pos].begin(),modewatchers[pos].end(),mw);
 946
 947         if (a == modewatchers[pos].end())
 948         {
 949                 return false;
 950         }
 951
 952         modewatchers[pos].erase(a);
 953
 954         return true;
 955 }
 956
 957 /** This default implementation can remove simple user modes
 958  */
 959 void ModeHandler::RemoveMode(userrec* user)
 960 {
 961         char moderemove[MAXBUF];
 962         const char* parameters[] = { user->nick, moderemove };
 963
 964         if (user->IsModeSet(this->GetModeChar()))
 965         {
 966                 sprintf(moderemove,"-%c",this->GetModeChar());
 967                 ServerInstance->Parser->CallHandler("MODE", parameters, 2, user);
 968         }
 969 }
 970
 971 /** This default implementation can remove simple channel modes
 972  * (no parameters)
 973  */
 974 void ModeHandler::RemoveMode(chanrec* channel)
 975 {
 976         char moderemove[MAXBUF];
 977         const char* parameters[] = { channel->name, moderemove };
 978
 979         if (channel->IsModeSet(this->GetModeChar()))
 980         {
 981                 userrec* n = new userrec(ServerInstance);
 982
 983                 sprintf(moderemove,"-%c",this->GetModeChar());
 984                 n->SetFd(FD_MAGIC_NUMBER);
 985
 986                 ServerInstance->SendMode(parameters, 2, n);
 987
 988                 delete n;
 989         }
 990 }
 991
 992 ModeParser::ModeParser(InspIRCd* Instance) : ServerInstance(Instance)
 993 {
 994         struct Initializer
 995         {
 996                 char modechar;
 997                 ModeHandler* handler;
 998         };
 999
1000         Initializer modes[] = {
1001                 { 's', new ModeChannelSecret(Instance) },
1002                 { 'p', new ModeChannelPrivate(Instance) },
1003                 { 'm', new ModeChannelModerated(Instance) },
1004                 { 't', new ModeChannelTopicOps(Instance) },
1005                 { 'n', new ModeChannelNoExternal(Instance) },
1006                 { 'i', new ModeChannelInviteOnly(Instance) },
1007                 { 'k', new ModeChannelKey(Instance) },
1008                 { 'l', new ModeChannelLimit(Instance) },
1009                 { 'b', new ModeChannelBan(Instance) },
1010                 { 'o', new ModeChannelOp(Instance) },
1011                 { 'h', new ModeChannelHalfOp(Instance) },
1012                 { 'v', new ModeChannelVoice(Instance) },
1013                 { 's', new ModeUserServerNotice(Instance) },
1014                 { 'w', new ModeUserWallops(Instance) },
1015                 { 'i', new ModeUserInvisible(Instance) },
1016                 { 'o', new ModeUserOperator(Instance) },
1017                 { 'n', new ModeUserServerNoticeMask(Instance) },
1018                 { 0, NULL }
1019         };
1020
1021         /* Clear mode list */
1022         memset(modehandlers, 0, sizeof(modehandlers));
1023         memset(modewatchers, 0, sizeof(modewatchers));
1024
1025         /* Last parse string */
1026         LastParse = "";
1027
1028         /* Initialise the RFC mode letters */
1029         for (int index = 0; modes[index].modechar; index++)
1030                 this->AddMode(modes[index].handler, modes[index].modechar);
1031 }