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                         ServerInstance->Log(DEBUG,"User already has privilage %d (privset: %d)", MASK, n->second);
 189                         return "";
 190                 }
 191                 n->second = n->second | MASK;
 192                 switch (MASK)
 193                 {
 194                         case UCMODE_OP:
 195                                 n->first->AddOppedUser(d);
 196                         break;
 197                         case UCMODE_HOP:
 198                                 n->first->AddHalfoppedUser(d);
 199                         break;
 200                         case UCMODE_VOICE:
 201                                 n->first->AddVoicedUser(d);
 202                         break;
 203                 }
 204                 ServerInstance->Log(DEBUG,"grant: %s %s",n->first->name,d->nick);
 205                 return d->nick;
 206         }
 207         else
 208         {
 209                 ServerInstance->Log(DEBUG,"Channel %s not in users joined list", chan->name);
 210         }
 211         return "";
 212 }
 213
 214 const char* ModeParser::Revoke(userrec *d,chanrec *chan,int MASK)
 215 {
 216         if (!chan)
 217                 return "";
 218
 219         UCListIter n = d->chans.find(chan);
 220         if (n != d->chans.end())
 221         {
 222                 if ((n->second & MASK) == 0)
 223                 {
 224                         return "";
 225                 }
 226                 n->second ^= MASK;
 227                 switch (MASK)
 228                 {
 229                         case UCMODE_OP:
 230                                 n->first->DelOppedUser(d);
 231                         break;
 232                         case UCMODE_HOP:
 233                                 n->first->DelHalfoppedUser(d);
 234                         break;
 235                         case UCMODE_VOICE:
 236                                 n->first->DelVoicedUser(d);
 237                         break;
 238                 }
 239                 ServerInstance->Log(DEBUG,"revoke: %s %s",n->first->name,d->nick);
 240                 return d->nick;
 241         }
 242         return "";
 243 }
 244
 245 void ModeParser::DisplayCurrentModes(userrec *user, userrec* targetuser, chanrec* targetchannel, const char* text)
 246 {
 247         if (targetchannel)
 248         {
 249                 /* Display channel's current mode string */
 250                 user->WriteServ("324 %s %s +%s",user->nick, targetchannel->name, targetchannel->ChanModes(targetchannel->HasUser(user)));
 251                 user->WriteServ("329 %s %s %lu", user->nick, targetchannel->name, (unsigned long)targetchannel->age);
 252                 return;
 253         }
 254         else if (targetuser)
 255         {
 256                 if ((targetuser == user) || (*user->oper))
 257                 {
 258                         /* Display user's current mode string */
 259                         user->WriteServ("221 %s :+%s",targetuser->nick,targetuser->FormatModes());
 260                         if (*targetuser->oper)
 261                                 user->WriteServ("008 %s +%s :Server notice mask", targetuser->nick, targetuser->FormatNoticeMasks());
 262                         return;
 263                 }
 264                 else
 265                 {
 266                         user->WriteServ("502 %s :Can't change mode for other users", user->nick);
 267                         return;
 268                 }
 269         }
 270
 271         /* No such nick/channel */
 272         user->WriteServ("401 %s %s :No such nick/channel",user->nick, text);
 273         return;
 274 }
 275
 276 void ModeParser::Process(const char** parameters, int pcnt, userrec *user, bool servermode)
 277 {
 278         std::string target = parameters[0];
 279         ModeType type = MODETYPE_USER;
 280         unsigned char mask = 0;
 281         chanrec* targetchannel = ServerInstance->FindChan(parameters[0]);
 282         userrec* targetuser  = ServerInstance->FindNick(parameters[0]);
 283
 284         ServerInstance->Log(DEBUG,"ModeParser::Process start: pcnt=%d",pcnt);
 285
 286         LastParse = "";
 287
 288         /* Special case for displaying the list for listmodes,
 289          * e.g. MODE #chan b, or MODE #chan +b without a parameter
 290          */
 291         if ((targetchannel) && (pcnt == 2))
 292         {
 293                 ServerInstance->Log(DEBUG,"Spool list");
 294                 const char* mode = parameters[1];
 295
 296                 while (mode && *mode)
 297                 {
 298                         if (*mode == '+')
 299                         {
 300                                 mode++;
 301                                 continue;
 302                         }
 303
 304                         ModeHandler *mh = this->FindMode(*mode, MODETYPE_CHANNEL);
 305
 306                         if ((mh) && (mh->IsListMode()))
 307                         {
 308                                 mh->DisplayList(user, targetchannel);
 309                         }
 310
 311                         mode++;
 312                 }
 313         }
 314
 315         if (pcnt == 1)
 316         {
 317                 ServerInstance->Log(DEBUG,"Mode list request");
 318                 this->DisplayCurrentModes(user, targetuser, targetchannel, parameters[0]);
 319         }
 320         else if (pcnt > 1)
 321         {
 322                 ServerInstance->Log(DEBUG,"More than one parameter");
 323
 324                 if (targetchannel)
 325                 {
 326                         type = MODETYPE_CHANNEL;
 327                         mask = MASK_CHANNEL;
 328
 329                         /* Extra security checks on channel modes
 330                          * (e.g. are they a (half)op?
 331                          */
 332
 333                         if ((IS_LOCAL(user)) && (targetchannel->GetStatus(user) < STATUS_HOP))
 334                         {
 335                                 /* We don't have halfop */
 336                                 ServerInstance->Log(DEBUG,"The user is not a halfop or above, checking other reasons for being able to set the modes");
 337
 338                                 int MOD_RESULT = 0;
 339                                 FOREACH_RESULT(I_OnAccessCheck,OnAccessCheck(user, NULL, targetchannel, AC_GENERAL_MODE));
 340                                 if (MOD_RESULT == ACR_DENY)
 341                                         return;
 342
 343                                 if (MOD_RESULT == ACR_DEFAULT)
 344                                 {
 345                                         /* Are we a uline or is it a servermode? */
 346                                         if ((!ServerInstance->ULine(user->server)) && (!servermode))
 347                                         {
 348                                                 /* Not enough permission:
 349                                                  * NOT a uline and NOT a servermode,
 350                                                  * OR, NOT halfop or above.
 351                                                  */
 352                                                 user->WriteServ("482 %s %s :You're not a channel (half)operator",user->nick, targetchannel->name);
 353                                                 return;
 354                                         }
 355                                 }
 356                         }
 357                 }
 358                 else if (targetuser)
 359                 {
 360                         type = MODETYPE_USER;
 361                         mask = MASK_USER;
 362                         if ((user != targetuser) && (!ServerInstance->ULine(user->server)))
 363                         {
 364                                 user->WriteServ("502 %s :Can't change mode for other users", user->nick);
 365                                 return;
 366                         }
 367                 }
 368                 else
 369                 {
 370                         /* No such nick/channel */
 371                         user->WriteServ("401 %s %s :No such nick/channel",user->nick, parameters[0]);
 372                         return;
 373                 }
 374
 375                 std::string mode_sequence = parameters[1];
 376                 std::string parameter = "";
 377                 std::ostringstream parameter_list;
 378                 std::string output_sequence = "";
 379                 bool adding = true, state_change = false;
 380                 unsigned char handler_id = 0;
 381                 int parameter_counter = 2; /* Index of first parameter */
 382                 int parameter_count = 0;
 383                 bool last_successful_state_change = false;
 384
 385                 /* A mode sequence that doesnt start with + or -. Assume +. - Thanks for the suggestion spike (bug#132) */
 386                 if ((*mode_sequence.begin() != '+') && (*mode_sequence.begin() != '-'))
 387                         mode_sequence.insert(0, "+");
 388
 389                 for (std::string::const_iterator letter = mode_sequence.begin(); letter != mode_sequence.end(); letter++)
 390                 {
 391                         unsigned char modechar = *letter;
 392
 393                         switch (modechar)
 394                         {
 395                                 /* NB:
 396                                  * For + and - mode characters, we don't just stick the character into the output sequence.
 397                                  * This is because the user may do something dumb, like: +-+ooo or +oo-+. To prevent this
 398                                  * appearing in the output sequence, we store a flag which says there was a state change,
 399                                  * which is set on any + or -, however, the + or - that we finish on is only appended to
 400                                  * the output stream in the event it is followed by a non "+ or -" character, such as o or v.
 401                                  */
 402                                 case '+':
 403                                         /* The following expression prevents: +o+o nick nick, compressing it to +oo nick nick,
 404                                          * however, will allow the + if it is the first item in the sequence, regardless.
 405                                          */
 406                                         if ((!adding) || (!output_sequence.length()))
 407                                                 state_change = true;
 408                                         adding = true;
 409                                         if (!output_sequence.length())
 410                                                 last_successful_state_change = false;
 411                                         continue;
 412                                 break;
 413                                 case '-':
 414                                         if ((adding) || (!output_sequence.length()))
 415                                                 state_change = true;
 416                                         adding = false;
 417                                         if (!output_sequence.length())
 418                                                 last_successful_state_change = true;
 419                                         continue;
 420                                 break;
 421                                 default:
 422
 423                                         /**
 424                                          * Watch carefully for the sleight of hand trick.
 425                                          * 65 is the ascii value of 'A'. We take this from
 426                                          * the char we're looking at to get a number between
 427                                          * 1 and 127. We then logic-or it to get the hashed
 428                                          * position, dependent on wether its a channel or
 429                                          * a user mode. This is a little stranger, but a lot
 430                                          * faster, than using a map of pairs.
 431                                          */
 432                                         handler_id = (modechar - 65) | mask;
 433
 434                                         if (modehandlers[handler_id])
 435                                         {
 436                                                 bool abort = false;
 437
 438                                                 if (modehandlers[handler_id]->GetModeType() == type)
 439                                                 {
 440                                                         if (modehandlers[handler_id]->GetNumParams(adding))
 441                                                         {
 442                                                                 /* This mode expects a parameter, do we have any parameters left in our list to use? */
 443                                                                 if (parameter_counter < pcnt)
 444                                                                 {
 445                                                                         ServerInstance->Log(DEBUG,"parameter_counter = %d, pcnt = %d", parameter_counter, pcnt);
 446                                                                         parameter = parameters[parameter_counter++];
 447
 448                                                                         /* Yerk, invalid! */
 449                                                                         if ((parameter.find(':') == 0) || (parameter.rfind(' ') != std::string::npos))
 450                                                                                 parameter = "";
 451                                                                 }
 452                                                                 else
 453                                                                 {
 454                                                                         /* No parameter, continue to the next mode */
 455                                                                         continue;
 456                                                                 }
 457
 458                                                                 for (ModeWatchIter watchers = modewatchers[handler_id].begin(); watchers != modewatchers[handler_id].end(); watchers++)
 459                                                                 {
 460                                                                         if ((*watchers)->BeforeMode(user, targetuser, targetchannel, parameter, adding, type) == MODEACTION_DENY)
 461                                                                         {
 462                                                                                 abort = true;
 463                                                                                 break;
 464                                                                         }
 465                                                                 }
 466
 467                                                                 if (abort)
 468                                                                         continue;
 469                                                         }
 470
 471                                                         /* It's an oper only mode, check if theyre an oper. If they arent,
 472                                                          * eat any parameter that  came with the mode, and continue to next
 473                                                          */
 474                                                         if ((IS_LOCAL(user)) && (modehandlers[handler_id]->NeedsOper()) && (!*user->oper))
 475                                                         {
 476                                                                 user->WriteServ("481 %s :Permission Denied- Only IRC operators may %sset %s mode %c", user->nick,
 477                                                                                 adding ? "" : "un", type == MODETYPE_CHANNEL ? "channel" : "user",
 478                                                                                 modehandlers[handler_id]->GetModeChar());
 479                                                                 continue;
 480                                                         }
 481
 482                                                         /* Call the handler for the mode */
 483                                                         ModeAction ma = modehandlers[handler_id]->OnModeChange(user, targetuser, targetchannel, parameter, adding);
 484
 485                                                         if ((modehandlers[handler_id]->GetNumParams(adding)) && (parameter == ""))
 486                                                         {
 487                                                                 /* The handler nuked the parameter and they are supposed to have one.
 488                                                                  * We CANT continue now, even if they actually returned MODEACTION_ALLOW,
 489                                                                  * so we bail to the next mode character.
 490                                                                  */
 491                                                                 continue;
 492                                                         }
 493
 494                                                         if (ma == MODEACTION_ALLOW)
 495                                                         {
 496                                                                 /* We're about to output a valid mode letter - was there previously a pending state-change? */
 497                                                                 if (state_change)
 498                                                                 {
 499                                                                         if (adding != last_successful_state_change)
 500                                                                                 output_sequence.append(adding ? "+" : "-");
 501                                                                         last_successful_state_change = adding;
 502                                                                 }
 503
 504                                                                 /* Add the mode letter */
 505                                                                 output_sequence.push_back(modechar);
 506
 507                                                                 /* Is there a valid parameter for this mode? If so add it to the parameter list */
 508                                                                 if ((modehandlers[handler_id]->GetNumParams(adding)) && (parameter != ""))
 509                                                                 {
 510                                                                         parameter_list << " " << parameter;
 511                                                                         parameter_count++;
 512                                                                         /* Does this mode have a prefix? */
 513                                                                         if (modehandlers[handler_id]->GetPrefix() && targetchannel)
 514                                                                         {
 515                                                                                 userrec* user_to_prefix = ServerInstance->FindNick(parameter);
 516                                                                                 if (user_to_prefix)
 517                                                                                         targetchannel->SetPrefix(user_to_prefix, modehandlers[handler_id]->GetPrefix(),
 518                                                                                                         modehandlers[handler_id]->GetPrefixRank(), adding);
 519                                                                         }
 520                                                                 }
 521
 522                                                                 /* Call all the AfterMode events in the mode watchers for this mode */
 523                                                                 for (ModeWatchIter watchers = modewatchers[handler_id].begin(); watchers != modewatchers[handler_id].end(); watchers++)
 524                                                                         (*watchers)->AfterMode(user, targetuser, targetchannel, parameter, adding, type);
 525
 526                                                                 /* Reset the state change flag */
 527                                                                 state_change = false;
 528
 529                                                                 if ((output_sequence.length() + parameter_list.str().length() > 450) || (output_sequence.length() > 100)
 530                                                                                 || (parameter_count > MAXMODES))
 531                                                                 {
 532                                                                         /* We cant have a mode sequence this long */
 533                                                                         letter = mode_sequence.end() - 1;
 534                                                                         continue;
 535                                                                 }
 536                                                         }
 537                                                 }
 538                                         }
 539                                         else
 540                                         {
 541                                                 /* No mode handler? Unknown mode character then. */
 542                                                 user->WriteServ("472 %s %c :is unknown mode char to me",user->nick, modechar);
 543                                         }
 544                                 break;
 545                         }
 546                 }
 547                 /* Was there at least one valid mode in the sequence? */
 548                 if (output_sequence != "")
 549                 {
 550                         if (servermode)
 551                         {
 552                                 if (type == MODETYPE_CHANNEL)
 553                                 {
 554                                         targetchannel->WriteChannelWithServ(ServerInstance->Config->ServerName, "MODE %s %s%s", targetchannel->name, output_sequence.c_str(), parameter_list.str().c_str());
 555                                         this->LastParse = targetchannel->name;
 556                                 }
 557                                 else
 558                                 {
 559                                         targetuser->WriteServ("MODE %s %s%s",targetuser->nick,output_sequence.c_str(), parameter_list.str().c_str());
 560                                         this->LastParse = targetuser->nick;
 561                                 }
 562                         }
 563                         else
 564                         {
 565                                 if (type == MODETYPE_CHANNEL)
 566                                 {
 567                                         ServerInstance->Log(DEBUG,"Write output sequence and parameters to channel: %s %s%s",targetchannel->name,output_sequence.c_str(),parameter_list.str().c_str());
 568                                         targetchannel->WriteChannel(user,"MODE %s %s%s",targetchannel->name,output_sequence.c_str(),parameter_list.str().c_str());
 569                                         FOREACH_MOD(I_OnMode,OnMode(user, targetchannel, TYPE_CHANNEL, output_sequence + parameter_list.str()));
 570                                         this->LastParse = targetchannel->name;
 571                                 }
 572                                 else
 573                                 {
 574                                         user->WriteTo(targetuser,"MODE %s %s%s",targetuser->nick,output_sequence.c_str(), parameter_list.str().c_str());
 575                                         FOREACH_MOD(I_OnMode,OnMode(user, targetuser, TYPE_USER, output_sequence + parameter_list.str()));
 576                                         this->LastParse = targetuser->nick;
 577                                 }
 578                         }
 579
 580                         LastParse.append(" ");
 581                         LastParse.append(output_sequence);
 582                         LastParse.append(parameter_list.str());
 583                 }
 584         }
 585 }
 586
 587 const std::string& ModeParser::GetLastParse()
 588 {
 589         return LastParse;
 590 }
 591
 592 void ModeParser::CleanMask(std::string &mask)
 593 {
 594         std::string::size_type pos_of_pling = mask.find_first_of('!');
 595         std::string::size_type pos_of_at = mask.find_first_of('@');
 596         std::string::size_type pos_of_dot = mask.find_first_of('.');
 597         std::string::size_type pos_of_colon = mask.find_first_of(':'); /* Because ipv6 addresses are colon delimited */
 598
 599         if ((pos_of_pling == std::string::npos) && (pos_of_at == std::string::npos))
 600         {
 601                 /* Just a nick, or just a host */
 602                 if ((pos_of_dot == std::string::npos) && (pos_of_colon == std::string::npos))
 603                 {
 604                         /* It has no '.' in it, it must be a nick. */
 605                         mask.append("!*@*");
 606                 }
 607                 else
 608                 {
 609                         /* Got a dot in it? Has to be a host */
 610                         mask = "*!*@" + mask;
 611                 }
 612         }
 613         else if ((pos_of_pling == std::string::npos) && (pos_of_at != std::string::npos))
 614         {
 615                 /* Has an @ but no !, its a user@host */
 616                  mask = "*!" + mask;
 617         }
 618         else if ((pos_of_pling != std::string::npos) && (pos_of_at == std::string::npos))
 619         {
 620                 /* Has a ! but no @, it must be a nick!ident */
 621                 mask.append("@*");
 622         }
 623 }
 624
 625 bool ModeParser::AddMode(ModeHandler* mh, unsigned const char modeletter)
 626 {
 627         unsigned char mask = 0;
 628         unsigned char pos = 0;
 629
 630         /* Yes, i know, this might let people declare modes like '_' or '^'.
 631          * If they do that, thats their problem, and if i ever EVER see an
 632          * official InspIRCd developer do that, i'll beat them with a paddle!
 633          */
 634         if ((mh->GetModeChar() < 'A') || (mh->GetModeChar() > 'z'))
 635                 return false;
 636
 637         /* A mode prefix of ',' is not acceptable, it would fuck up server to server.
 638          * A mode prefix of ':' will fuck up both server to server, and client to server.
 639          * A mode prefix of '#' will mess up /whois and /privmsg
 640          */
 641         if ((mh->GetPrefix() == ',') || (mh->GetPrefix() == ':') || (mh->GetPrefix() == '#'))
 642                 return false;
 643
 644         mh->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
 645         pos = (mh->GetModeChar()-65) | mask;
 646
 647         if (modehandlers[pos])
 648                 return false;
 649
 650         modehandlers[pos] = mh;
 651         ServerInstance->Log(DEBUG,"ModeParser::AddMode: added mode %c",mh->GetModeChar());
 652         return true;
 653 }
 654
 655 bool ModeParser::DelMode(ModeHandler* mh)
 656 {
 657         unsigned char mask = 0;
 658         unsigned char pos = 0;
 659
 660         if ((mh->GetModeChar() < 'A') || (mh->GetModeChar() > 'z'))
 661                 return false;
 662
 663         mh->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
 664         pos = (mh->GetModeChar()-65) | mask;
 665
 666         if (!modehandlers[pos])
 667                 return false;
 668
 669         switch (mh->GetModeType())
 670         {
 671                 case MODETYPE_USER:
 672                         for (user_hash::iterator i = ServerInstance->clientlist->begin(); i != ServerInstance->clientlist->end(); i++)
 673                         {
 674                                 mh->RemoveMode(i->second);
 675                         }
 676                 break;
 677                 case MODETYPE_CHANNEL:
 678                         for (chan_hash::iterator i = ServerInstance->chanlist->begin(); i != ServerInstance->chanlist->end(); i++)
 679                         {
 680                                 mh->RemoveMode(i->second);
 681                         }
 682                 break;
 683         }
 684
 685         modehandlers[pos] = NULL;
 686
 687         return true;
 688 }
 689
 690 ModeHandler* ModeParser::FindMode(unsigned const char modeletter, ModeType mt)
 691 {
 692         unsigned char mask = 0;
 693         unsigned char pos = 0;
 694
 695         if ((modeletter < 'A') || (modeletter > 'z'))
 696                 return NULL;
 697
 698         mt == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
 699         pos = (modeletter-65) | mask;
 700
 701         return modehandlers[pos];
 702 }
 703
 704 std::string ModeParser::UserModeList()
 705 {
 706         char modestr[256];
 707         int pointer = 0;
 708
 709         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 710         {
 711                 unsigned char pos = (mode-65) | MASK_USER;
 712
 713                 if (modehandlers[pos])
 714                         modestr[pointer++] = mode;
 715         }
 716         modestr[pointer++] = 0;
 717         return modestr;
 718 }
 719
 720 std::string ModeParser::ChannelModeList()
 721 {
 722         char modestr[256];
 723         int pointer = 0;
 724
 725         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 726         {
 727                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 728
 729                 if (modehandlers[pos])
 730                         modestr[pointer++] = mode;
 731         }
 732         modestr[pointer++] = 0;
 733         return modestr;
 734 }
 735
 736 std::string ModeParser::ParaModeList()
 737 {
 738         char modestr[256];
 739         int pointer = 0;
 740
 741         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 742         {
 743                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 744
 745                 if ((modehandlers[pos]) && (modehandlers[pos]->GetNumParams(true)))
 746                         modestr[pointer++] = mode;
 747         }
 748         modestr[pointer++] = 0;
 749         return modestr;
 750 }
 751
 752 ModeHandler* ModeParser::FindPrefix(unsigned const char pfxletter)
 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]->GetPrefix() == pfxletter))
 759                 {
 760                         return modehandlers[pos];
 761                 }
 762         }
 763         return NULL;
 764 }
 765
 766 std::string ModeParser::ModeString(userrec* user, chanrec* channel)
 767 {
 768         std::string types;
 769         std::string pars;
 770
 771         if (!channel || !user)
 772                 return "";
 773
 774         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 775         {
 776                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 777                 ModeHandler* mh = modehandlers[pos];
 778                 if ((mh) && (mh->GetNumParams(true)) && (mh->GetNumParams(false)))
 779                 {
 780                         ModePair ret;
 781                         ret = mh->ModeSet(NULL, user, channel, user->nick);
 782                         if ((ret.first) && (ret.second == user->nick))
 783                         {
 784                                 pars.append(" ");
 785                                 pars.append(user->nick);
 786                                 types.push_back(mh->GetModeChar());
 787                         }
 788                 }
 789         }
 790
 791         return types+pars;
 792 }
 793
 794 std::string ModeParser::ChanModes()
 795 {
 796         std::string type1;      /* Listmodes EXCEPT those with a prefix */
 797         std::string type2;      /* Modes that take a param when adding or removing */
 798         std::string type3;      /* Modes that only take a param when adding */
 799         std::string type4;      /* Modes that dont take a param */
 800
 801         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 802         {
 803                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 804                  /* One parameter when adding */
 805                 if (modehandlers[pos])
 806                 {
 807                         if (modehandlers[pos]->GetNumParams(true))
 808                         {
 809                                 if ((modehandlers[pos]->IsListMode()) && (!modehandlers[pos]->GetPrefix()))
 810                                 {
 811                                         type1 += modehandlers[pos]->GetModeChar();
 812                                 }
 813                                 else
 814                                 {
 815                                         /* ... and one parameter when removing */
 816                                         if (modehandlers[pos]->GetNumParams(false))
 817                                         {
 818                                                 /* But not a list mode */
 819                                                 if (!modehandlers[pos]->GetPrefix())
 820                                                 {
 821                                                         type2 += modehandlers[pos]->GetModeChar();
 822                                                 }
 823                                         }
 824                                         else
 825                                         {
 826                                                 /* No parameters when removing */
 827                                                 type3 += modehandlers[pos]->GetModeChar();
 828                                         }
 829                                 }
 830                         }
 831                         else
 832                         {
 833                                 type4 += modehandlers[pos]->GetModeChar();
 834                         }
 835                 }
 836
 837         }
 838
 839         return type1 + "," + type2 + "," + type3 + "," + type4;
 840 }
 841
 842 bool ModeParser::PrefixComparison(const prefixtype one, const prefixtype two)
 843 {
 844         return one.second > two.second;
 845 }
 846
 847 std::string ModeParser::BuildPrefixes()
 848 {
 849         std::string mletters = "";
 850         std::string mprefixes = "";
 851         pfxcontainer pfx;
 852         std::map<char,char> prefix_to_mode;
 853
 854         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 855         {
 856                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 857
 858                 if ((modehandlers[pos]) && (modehandlers[pos]->GetPrefix()))
 859                 {
 860                         pfx.push_back(std::make_pair<char,unsigned int>(modehandlers[pos]->GetPrefix(), modehandlers[pos]->GetPrefixRank()));
 861                         prefix_to_mode[modehandlers[pos]->GetPrefix()] = modehandlers[pos]->GetModeChar();
 862                 }
 863         }
 864
 865         sort(pfx.begin(), pfx.end(), ModeParser::PrefixComparison);
 866
 867         for (pfxcontainer::iterator n = pfx.begin(); n != pfx.end(); n++)
 868         {
 869                 mletters = mletters + n->first;
 870                 mprefixes = mprefixes + prefix_to_mode.find(n->first)->second;
 871         }
 872
 873         return "(" + mprefixes + ")" + mletters;
 874 }
 875
 876 bool ModeParser::AddModeWatcher(ModeWatcher* mw)
 877 {
 878         unsigned char mask = 0;
 879         unsigned char pos = 0;
 880
 881         if (!mw)
 882                 return false;
 883
 884         if ((mw->GetModeChar() < 'A') || (mw->GetModeChar() > 'z'))
 885                 return false;
 886
 887         mw->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
 888         pos = (mw->GetModeChar()-65) | mask;
 889
 890         modewatchers[pos].push_back(mw);
 891         ServerInstance->Log(DEBUG,"ModeParser::AddModeWatcher: watching mode %c",mw->GetModeChar());
 892
 893         return true;
 894 }
 895
 896 bool ModeParser::DelModeWatcher(ModeWatcher* mw)
 897 {
 898         unsigned char mask = 0;
 899         unsigned char pos = 0;
 900
 901         if (!mw)
 902                 return false;
 903
 904         if ((mw->GetModeChar() < 'A') || (mw->GetModeChar() > 'z'))
 905                 return false;
 906
 907         mw->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
 908         pos = (mw->GetModeChar()-65) | mask;
 909
 910         ModeWatchIter a = find(modewatchers[pos].begin(),modewatchers[pos].end(),mw);
 911
 912         if (a == modewatchers[pos].end())
 913         {
 914                 ServerInstance->Log(DEBUG, "ModeParser::DelModeWatcher: Couldn't find watcher for mode %c in list", mw->GetModeChar());
 915                 return false;
 916         }
 917
 918         modewatchers[pos].erase(a);
 919         ServerInstance->Log(DEBUG,"ModeParser::DelModeWatcher: stopped watching mode %c",mw->GetModeChar());
 920
 921         return true;
 922 }
 923
 924 /** This default implementation can remove simple user modes
 925  */
 926 void ModeHandler::RemoveMode(userrec* user)
 927 {
 928         char moderemove[MAXBUF];
 929         const char* parameters[] = { user->nick, moderemove };
 930
 931         if (user->IsModeSet(this->GetModeChar()))
 932         {
 933                 sprintf(moderemove,"-%c",this->GetModeChar());
 934                 ServerInstance->Parser->CallHandler("MODE", parameters, 2, user);
 935         }
 936 }
 937
 938 /** This default implementation can remove simple channel modes
 939  * (no parameters)
 940  */
 941 void ModeHandler::RemoveMode(chanrec* channel)
 942 {
 943         char moderemove[MAXBUF];
 944         const char* parameters[] = { channel->name, moderemove };
 945
 946         if (channel->IsModeSet(this->GetModeChar()))
 947         {
 948                 userrec* n = new userrec(ServerInstance);
 949
 950                 sprintf(moderemove,"-%c",this->GetModeChar());
 951                 n->SetFd(FD_MAGIC_NUMBER);
 952
 953                 ServerInstance->SendMode(parameters, 2, n);
 954
 955                 delete n;
 956         }
 957 }
 958
 959 ModeParser::ModeParser(InspIRCd* Instance) : ServerInstance(Instance)
 960 {
 961         /* Clear mode list */
 962         memset(modehandlers, 0, sizeof(modehandlers));
 963         memset(modewatchers, 0, sizeof(modewatchers));
 964
 965         /* Last parse string */
 966         LastParse = "";
 967
 968         /* Initialise the RFC mode letters */
 969
 970         /* Start with channel simple modes, no params */
 971         this->AddMode(new ModeChannelSecret(Instance), 's');
 972         this->AddMode(new ModeChannelPrivate(Instance), 'p');
 973         this->AddMode(new ModeChannelModerated(Instance), 'm');
 974         this->AddMode(new ModeChannelTopicOps(Instance), 't');
 975         this->AddMode(new ModeChannelNoExternal(Instance), 'n');
 976         this->AddMode(new ModeChannelInviteOnly(Instance), 'i');
 977
 978         /* Cannel modes with params */
 979         this->AddMode(new ModeChannelKey(Instance), 'k');
 980         this->AddMode(new ModeChannelLimit(Instance), 'l');
 981
 982         /* Channel listmodes */
 983         this->AddMode(new ModeChannelBan(Instance), 'b');
 984         this->AddMode(new ModeChannelOp(Instance), 'o');
 985         this->AddMode(new ModeChannelHalfOp(Instance), 'h');
 986         this->AddMode(new ModeChannelVoice(Instance), 'v');
 987
 988         /* Now for usermodes */
 989         this->AddMode(new ModeUserServerNotice(Instance), 's');
 990         this->AddMode(new ModeUserWallops(Instance), 'w');
 991         this->AddMode(new ModeUserInvisible(Instance), 'i');
 992         this->AddMode(new ModeUserOperator(Instance), 'o');
 993         this->AddMode(new ModeUserServerNoticeMask(Instance), 'n');
 994 }