src/mode.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
   6  *                       E-mail:
   7  *              <brain@chatspike.net>
   8  *                <Craig@chatspike.net>
   9  *
  10  * Written by Craig Edwards, Craig McLure, and others.
  11  * This program is free but copyrighted software; see
  12  *          the file COPYING for details.
  13  *
  14  * ---------------------------------------------------
  15  */
  16
  17 using namespace std;
  18
  19 #include "inspircd.h"
  20 #include "users.h"
  21 #include "modules.h"
  22 #include "inspstring.h"
  23 #include "mode.h"
  24
  25 /* +s (secret) */
  26 #include "modes/cmode_s.h"
  27 /* +p (private) */
  28 #include "modes/cmode_p.h"
  29 /* +b (bans) */
  30 #include "modes/cmode_b.h"
  31 /* +m (moderated) */
  32 #include "modes/cmode_m.h"
  33 /* +t (only (half) ops can change topic) */
  34 #include "modes/cmode_t.h"
  35 /* +n (no external messages) */
  36 #include "modes/cmode_n.h"
  37 /* +i (invite only) */
  38 #include "modes/cmode_i.h"
  39 /* +k (keyed channel) */
  40 #include "modes/cmode_k.h"
  41 /* +l (channel user limit) */
  42 #include "modes/cmode_l.h"
  43 /* +o (channel op) */
  44 #include "modes/cmode_o.h"
  45 /* +h (channel halfop) */
  46 #include "modes/cmode_h.h"
  47 /* +v (channel voice) */
  48 #include "modes/cmode_v.h"
  49 /* +s (server notices) */
  50 #include "modes/umode_s.h"
  51 /* +w (see wallops) */
  52 #include "modes/umode_w.h"
  53 /* +i (invisible) */
  54 #include "modes/umode_i.h"
  55 /* +o (operator) */
  56 #include "modes/umode_o.h"
  57 /* +n (notice mask - our implementation of snomasks) */
  58 #include "modes/umode_n.h"
  59
  60 ModeHandler::ModeHandler(InspIRCd* Instance, char modeletter, int parameters_on, int parameters_off, bool listmode, ModeType type, bool operonly, char mprefix)
  61         : ServerInstance(Instance), mode(modeletter), n_params_on(parameters_on), n_params_off(parameters_off), list(listmode), m_type(type), oper(operonly), prefix(mprefix)
  62 {
  63 }
  64
  65 ModeHandler::~ModeHandler()
  66 {
  67 }
  68
  69 bool ModeHandler::IsListMode()
  70 {
  71         return list;
  72 }
  73
  74 unsigned int ModeHandler::GetPrefixRank()
  75 {
  76         return 0;
  77 }
  78
  79 ModeType ModeHandler::GetModeType()
  80 {
  81         return m_type;
  82 }
  83
  84 bool ModeHandler::NeedsOper()
  85 {
  86         return oper;
  87 }
  88
  89 char ModeHandler::GetPrefix()
  90 {
  91         return prefix;
  92 }
  93
  94 int ModeHandler::GetNumParams(bool adding)
  95 {
  96         return adding ? n_params_on : n_params_off;
  97 }
  98
  99 char ModeHandler::GetModeChar()
 100 {
 101         return mode;
 102 }
 103
 104 ModeAction ModeHandler::OnModeChange(userrec* source, userrec* dest, chanrec* channel, std::string &parameter, bool adding)
 105 {
 106         return MODEACTION_DENY;
 107 }
 108
 109 ModePair ModeHandler::ModeSet(userrec* source, userrec* dest, chanrec* channel, const std::string &parameter)
 110 {
 111         if (dest)
 112         {
 113                 return std::make_pair(dest->IsModeSet(this->mode), "");
 114         }
 115         else
 116         {
 117                 return std::make_pair(channel->IsModeSet(this->mode), "");
 118         }
 119 }
 120
 121 void ModeHandler::DisplayList(userrec* user, chanrec* channel)
 122 {
 123 }
 124
 125 bool ModeHandler::CheckTimeStamp(time_t theirs, time_t ours, const std::string &their_param, const std::string &our_param, chanrec* channel)
 126 {
 127         return (ours < theirs);
 128 }
 129
 130 ModeWatcher::ModeWatcher(InspIRCd* Instance, char modeletter, ModeType type) : ServerInstance(Instance), mode(modeletter), m_type(type)
 131 {
 132 }
 133
 134 ModeWatcher::~ModeWatcher()
 135 {
 136 }
 137
 138 char ModeWatcher::GetModeChar()
 139 {
 140         return mode;
 141 }
 142
 143 ModeType ModeWatcher::GetModeType()
 144 {
 145         return m_type;
 146 }
 147
 148 bool ModeWatcher::BeforeMode(userrec* source, userrec* dest, chanrec* channel, std::string &parameter, bool adding, ModeType type)
 149 {
 150         return true;
 151 }
 152
 153 void ModeWatcher::AfterMode(userrec* source, userrec* dest, chanrec* channel, const std::string &parameter, bool adding, ModeType type)
 154 {
 155 }
 156
 157 userrec* ModeParser::SanityChecks(userrec *user,const char *dest,chanrec *chan,int status)
 158 {
 159         userrec *d;
 160         if ((!user) || (!dest) || (!chan) || (!*dest))
 161         {
 162                 return NULL;
 163         }
 164         d = ServerInstance->FindNick(dest);
 165         if (!d)
 166         {
 167                 user->WriteServ("401 %s %s :No such nick/channel",user->nick, dest);
 168                 return NULL;
 169         }
 170         return d;
 171 }
 172
 173 const char* ModeParser::Grant(userrec *d,chanrec *chan,int MASK)
 174 {
 175         if (!chan)
 176                 return "";
 177
 178         UCListIter n = d->chans.find(chan);
 179         if (n != d->chans.end())
 180         {
 181                 if (n->second & MASK)
 182                 {
 183                         return "";
 184                 }
 185                 n->second = n->second | MASK;
 186                 switch (MASK)
 187                 {
 188                         case UCMODE_OP:
 189                                 n->first->AddOppedUser(d);
 190                         break;
 191                         case UCMODE_HOP:
 192                                 n->first->AddHalfoppedUser(d);
 193                         break;
 194                         case UCMODE_VOICE:
 195                                 n->first->AddVoicedUser(d);
 196                         break;
 197                 }
 198                 ServerInstance->Log(DEBUG,"grant: %s %s",n->first->name,d->nick);
 199                 return d->nick;
 200         }
 201         return "";
 202 }
 203
 204 const char* ModeParser::Revoke(userrec *d,chanrec *chan,int MASK)
 205 {
 206         if (!chan)
 207                 return "";
 208
 209         UCListIter n = d->chans.find(chan);
 210         if (n != d->chans.end())
 211         {
 212                 if ((n->second & MASK) == 0)
 213                 {
 214                         return "";
 215                 }
 216                 n->second ^= MASK;
 217                 switch (MASK)
 218                 {
 219                         case UCMODE_OP:
 220                                 n->first->DelOppedUser(d);
 221                         break;
 222                         case UCMODE_HOP:
 223                                 n->first->DelHalfoppedUser(d);
 224                         break;
 225                         case UCMODE_VOICE:
 226                                 n->first->DelVoicedUser(d);
 227                         break;
 228                 }
 229                 ServerInstance->Log(DEBUG,"revoke: %s %s",n->first->name,d->nick);
 230                 return d->nick;
 231         }
 232         return "";
 233 }
 234
 235 void ModeParser::DisplayCurrentModes(userrec *user, userrec* targetuser, chanrec* targetchannel, const char* text)
 236 {
 237         if (targetchannel)
 238         {
 239                 /* Display channel's current mode string */
 240                 user->WriteServ("324 %s %s +%s",user->nick, targetchannel->name, targetchannel->ChanModes(targetchannel->HasUser(user)));
 241                 user->WriteServ("329 %s %s %lu", user->nick, targetchannel->name, (unsigned long)targetchannel->age);
 242                 return;
 243         }
 244         else if (targetuser)
 245         {
 246                 if ((targetuser == user) || (*user->oper))
 247                 {
 248                         /* Display user's current mode string */
 249                         user->WriteServ("221 %s :+%s",targetuser->nick,targetuser->FormatModes());
 250                         if (*targetuser->oper)
 251                                 user->WriteServ("008 %s +%s :Server notice mask", targetuser->nick, targetuser->FormatNoticeMasks());
 252                         return;
 253                 }
 254                 else
 255                 {
 256                         user->WriteServ("502 %s :Can't change mode for other users", user->nick);
 257                 }
 258         }
 259
 260         /* No such nick/channel */
 261         user->WriteServ("401 %s %s :No such nick/channel",user->nick, text);
 262         return;
 263 }
 264
 265 void ModeParser::Process(const char** parameters, int pcnt, userrec *user, bool servermode)
 266 {
 267         std::string target = parameters[0];
 268         ModeType type = MODETYPE_USER;
 269         unsigned char mask = 0;
 270         chanrec* targetchannel = ServerInstance->FindChan(parameters[0]);
 271         userrec* targetuser  = ServerInstance->FindNick(parameters[0]);
 272
 273         ServerInstance->Log(DEBUG,"ModeParser::Process start: pcnt=%d",pcnt);
 274         for (int j = 0; j < pcnt; j++)
 275                 ServerInstance->Log(DEBUG,"    parameters[%d] = '%s'", j, parameters[j]);
 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                 ServerInstance->Log(DEBUG,"Spool list");
 285                 const char* mode = parameters[1];
 286
 287                 while (mode && *mode)
 288                 {
 289                         if (*mode == '+')
 290                         {
 291                                 mode++;
 292                                 continue;
 293                         }
 294
 295                         ModeHandler *mh = this->FindMode(*mode, MODETYPE_CHANNEL);
 296
 297                         if ((mh) && (mh->IsListMode()))
 298                         {
 299                                 mh->DisplayList(user, targetchannel);
 300                         }
 301
 302                         mode++;
 303                 }
 304         }
 305
 306         if (pcnt == 1)
 307         {
 308                 ServerInstance->Log(DEBUG,"Mode list request");
 309                 this->DisplayCurrentModes(user, targetuser, targetchannel, parameters[0]);
 310         }
 311         else if (pcnt > 1)
 312         {
 313                 ServerInstance->Log(DEBUG,"More than one parameter");
 314
 315                 if (targetchannel)
 316                 {
 317                         type = MODETYPE_CHANNEL;
 318                         mask = MASK_CHANNEL;
 319
 320                         /* Extra security checks on channel modes
 321                          * (e.g. are they a (half)op?
 322                          */
 323
 324                         if ((IS_LOCAL(user)) && (targetchannel->GetStatus(user) < STATUS_HOP))
 325                         {
 326                                 /* We don't have halfop */
 327                                 ServerInstance->Log(DEBUG,"The user is not a halfop or above, checking other reasons for being able to set the modes");
 328
 329                                 int MOD_RESULT = 0;
 330                                 FOREACH_RESULT(I_OnAccessCheck,OnAccessCheck(user, NULL, targetchannel, AC_GENERAL_MODE));
 331                                 if (MOD_RESULT == ACR_DENY)
 332                                         return;
 333
 334                                 if (MOD_RESULT == ACR_DEFAULT)
 335                                 {
 336                                         /* Are we a uline or is it a servermode? */
 337                                         if ((!ServerInstance->ULine(user->server)) && (!servermode))
 338                                         {
 339                                                 /* Not enough permission:
 340                                                  * NOT a uline and NOT a servermode,
 341                                                  * OR, NOT halfop or above.
 342                                                  */
 343                                                 user->WriteServ("482 %s %s :You're not a channel (half)operator",user->nick, targetchannel->name);
 344                                                 return;
 345                                         }
 346                                 }
 347                         }
 348                 }
 349                 else if (targetuser)
 350                 {
 351                         type = MODETYPE_USER;
 352                         mask = MASK_USER;
 353                         if ((user != targetuser) && (!ServerInstance->ULine(user->server)))
 354                         {
 355                                 user->WriteServ("502 %s :Can't change mode for other users", user->nick);
 356                                 return;
 357                         }
 358                 }
 359                 else
 360                 {
 361                         /* No such nick/channel */
 362                         user->WriteServ("401 %s %s :No such nick/channel",user->nick, parameters[0]);
 363                         return;
 364                 }
 365
 366                 std::string mode_sequence = parameters[1];
 367                 std::string parameter = "";
 368                 std::ostringstream parameter_list;
 369                 std::string output_sequence = "";
 370                 bool adding = true, state_change = false;
 371                 unsigned char handler_id = 0;
 372                 int parameter_counter = 2; /* Index of first parameter */
 373                 int parameter_count = 0;
 374
 375                 /* A mode sequence that doesnt start with + or -. Assume +. - Thanks for the suggestion spike (bug#132) */
 376                 if ((*mode_sequence.begin() != '+') && (*mode_sequence.begin() != '-'))
 377                         mode_sequence.insert(0, "+");
 378
 379                 for (std::string::const_iterator letter = mode_sequence.begin(); letter != mode_sequence.end(); letter++)
 380                 {
 381                         unsigned char modechar = *letter;
 382
 383                         ServerInstance->Log(DEBUG,"Process letter %c", modechar);
 384
 385                         switch (modechar)
 386                         {
 387                                 /* NB:
 388                                  * For + and - mode characters, we don't just stick the character into the output sequence.
 389                                  * This is because the user may do something dumb, like: +-+ooo or +oo-+. To prevent this
 390                                  * appearing in the output sequence, we store a flag which says there was a state change,
 391                                  * which is set on any + or -, however, the + or - that we finish on is only appended to
 392                                  * the output stream in the event it is followed by a non "+ or -" character, such as o or v.
 393                                  */
 394                                 case '+':
 395                                         /* The following expression prevents: +o+o nick nick, compressing it to +oo nick nick,
 396                                          * however, will allow the + if it is the first item in the sequence, regardless.
 397                                          */
 398                                         if ((!adding) || (!output_sequence.length()))
 399                                                 state_change = true;
 400                                         adding = true;
 401                                         continue;
 402                                 break;
 403                                 case '-':
 404                                         if ((adding) || (!output_sequence.length()))
 405                                                 state_change = true;
 406                                         adding = false;
 407                                         continue;
 408                                 break;
 409                                 default:
 410
 411                                         /**
 412                                          * Watch carefully for the sleight of hand trick.
 413                                          * 65 is the ascii value of 'A'. We take this from
 414                                          * the char we're looking at to get a number between
 415                                          * 1 and 127. We then logic-or it to get the hashed
 416                                          * position, dependent on wether its a channel or
 417                                          * a user mode. This is a little stranger, but a lot
 418                                          * faster, than using a map of pairs.
 419                                          */
 420                                         handler_id = (modechar - 65) | mask;
 421
 422                                         if (modehandlers[handler_id])
 423                                         {
 424                                                 bool abort = false;
 425
 426                                                 for (ModeWatchIter watchers = modewatchers[handler_id].begin(); watchers != modewatchers[handler_id].end(); watchers++)
 427                                                 {
 428                                                         if ((*watchers)->BeforeMode(user, targetuser, targetchannel, parameter, adding, type) == MODEACTION_DENY)
 429                                                                 abort = true;
 430                                                 }
 431                                                 if ((modehandlers[handler_id]->GetModeType() == type) && (!abort))
 432                                                 {
 433                                                         if (modehandlers[handler_id]->GetNumParams(adding))
 434                                                         {
 435                                                                 /* This mode expects a parameter, do we have any parameters left in our list to use? */
 436                                                                 if (parameter_counter < pcnt)
 437                                                                 {
 438                                                                         ServerInstance->Log(DEBUG,"parameter_counter = %d, pcnt = %d", parameter_counter, pcnt);
 439                                                                         parameter = parameters[parameter_counter++];
 440
 441                                                                         /* Yerk, invalid! */
 442                                                                         if ((parameter.find(':') == 0) || (parameter.rfind(' ') != std::string::npos))
 443                                                                                 parameter = "";
 444                                                                 }
 445                                                                 else
 446                                                                 {
 447                                                                         /* No parameter, continue to the next mode */
 448                                                                         continue;
 449                                                                 }
 450                                                         }
 451
 452                                                         /* It's an oper only mode, check if theyre an oper. If they arent,
 453                                                          * eat any parameter that  came with the mode, and continue to next
 454                                                          */
 455                                                         if ((IS_LOCAL(user)) && (modehandlers[handler_id]->NeedsOper()) && (!*user->oper))
 456                                                         {
 457                                                                 user->WriteServ("481 %s :Permission Denied- Only IRC operators may %sset %s mode %c", user->nick,
 458                                                                                 adding ? "" : "un", type == MODETYPE_CHANNEL ? "channel" : "user",
 459                                                                                 modehandlers[handler_id]->GetModeChar());
 460                                                                 continue;
 461                                                         }
 462
 463                                                         /* Call the handler for the mode */
 464                                                         ModeAction ma = modehandlers[handler_id]->OnModeChange(user, targetuser, targetchannel, parameter, adding);
 465
 466                                                         if ((modehandlers[handler_id]->GetNumParams(adding)) && (parameter == ""))
 467                                                         {
 468                                                                 /* The handler nuked the parameter and they are supposed to have one.
 469                                                                  * We CANT continue now, even if they actually returned MODEACTION_ALLOW,
 470                                                                  * so we bail to the next mode character.
 471                                                                  */
 472                                                                 continue;
 473                                                         }
 474
 475                                                         if (ma == MODEACTION_ALLOW)
 476                                                         {
 477                                                                 /* We're about to output a valid mode letter - was there previously a pending state-change? */
 478                                                                 if (state_change)
 479                                                                         output_sequence.append(adding ? "+" : "-");
 480
 481                                                                 /* Add the mode letter */
 482                                                                 output_sequence.push_back(modechar);
 483
 484                                                                 /* Is there a valid parameter for this mode? If so add it to the parameter list */
 485                                                                 if ((modehandlers[handler_id]->GetNumParams(adding)) && (parameter != ""))
 486                                                                 {
 487                                                                         parameter_list << " " << parameter;
 488                                                                         parameter_count++;
 489                                                                         /* Does this mode have a prefix? */
 490                                                                         if (modehandlers[handler_id]->GetPrefix() && targetchannel)
 491                                                                         {
 492                                                                                 userrec* user_to_prefix = ServerInstance->FindNick(parameter);
 493                                                                                 if (user_to_prefix)
 494                                                                                         targetchannel->SetPrefix(user_to_prefix, modehandlers[handler_id]->GetPrefix(),
 495                                                                                                         modehandlers[handler_id]->GetPrefixRank(), adding);
 496                                                                         }
 497                                                                 }
 498
 499                                                                 /* Call all the AfterMode events in the mode watchers for this mode */
 500                                                                 for (ModeWatchIter watchers = modewatchers[handler_id].begin(); watchers != modewatchers[handler_id].end(); watchers++)
 501                                                                         (*watchers)->AfterMode(user, targetuser, targetchannel, parameter, adding, type);
 502
 503                                                                 /* Reset the state change flag */
 504                                                                 state_change = false;
 505
 506                                                                 if ((output_sequence.length() + parameter_list.str().length() > 450) || (output_sequence.length() > 100)
 507                                                                                 || (parameter_count > MAXMODES))
 508                                                                 {
 509                                                                         /* We cant have a mode sequence this long */
 510                                                                         letter = mode_sequence.end() - 1;
 511                                                                         continue;
 512                                                                 }
 513                                                         }
 514                                                 }
 515                                         }
 516                                         else
 517                                         {
 518                                                 /* No mode handler? Unknown mode character then. */
 519                                                 user->WriteServ("472 %s %c :is unknown mode char to me",user->nick, modechar);
 520                                         }
 521                                 break;
 522                         }
 523                 }
 524                 /* Was there at least one valid mode in the sequence? */
 525                 if (output_sequence != "")
 526                 {
 527                         if (servermode)
 528                         {
 529                                 if (type == MODETYPE_CHANNEL)
 530                                 {
 531                                         targetchannel->WriteChannelWithServ(ServerInstance->Config->ServerName, "MODE %s %s%s", targetchannel->name, output_sequence.c_str(), parameter_list.str().c_str());
 532                                         this->LastParse = targetchannel->name;
 533                                 }
 534                                 else
 535                                 {
 536                                         targetuser->WriteServ("MODE %s %s%s",targetuser->nick,output_sequence.c_str(), parameter_list.str().c_str());
 537                                         this->LastParse = targetuser->nick;
 538                                 }
 539                         }
 540                         else
 541                         {
 542                                 if (type == MODETYPE_CHANNEL)
 543                                 {
 544                                         ServerInstance->Log(DEBUG,"Write output sequence and parameters to channel: %s %s%s",targetchannel->name,output_sequence.c_str(),parameter_list.str().c_str());
 545                                         targetchannel->WriteChannel(user,"MODE %s %s%s",targetchannel->name,output_sequence.c_str(),parameter_list.str().c_str());
 546                                         FOREACH_MOD(I_OnMode,OnMode(user, targetchannel, TYPE_CHANNEL, output_sequence + parameter_list.str()));
 547                                         this->LastParse = targetchannel->name;
 548                                 }
 549                                 else
 550                                 {
 551                                         user->WriteTo(targetuser,"MODE %s %s%s",targetuser->nick,output_sequence.c_str(), parameter_list.str().c_str());
 552                                         FOREACH_MOD(I_OnMode,OnMode(user, targetuser, TYPE_USER, output_sequence + parameter_list.str()));
 553                                         this->LastParse = targetuser->nick;
 554                                 }
 555                         }
 556
 557                         LastParse.append(" ");
 558                         LastParse.append(output_sequence);
 559                         LastParse.append(parameter_list.str());
 560                 }
 561         }
 562 }
 563
 564 const std::string& ModeParser::GetLastParse()
 565 {
 566         return LastParse;
 567 }
 568
 569 void ModeParser::CleanMask(std::string &mask)
 570 {
 571         std::string::size_type pos_of_pling = mask.find_first_of('!');
 572         std::string::size_type pos_of_at = mask.find_first_of('@');
 573         std::string::size_type pos_of_dot = mask.find_first_of('.');
 574         std::string::size_type pos_of_colon = mask.find_first_of(':'); /* Because ipv6 addresses are colon delimited */
 575
 576         if ((pos_of_pling == std::string::npos) && (pos_of_at == std::string::npos))
 577         {
 578                 /* Just a nick, or just a host */
 579                 if ((pos_of_dot == std::string::npos) && (pos_of_colon == std::string::npos))
 580                 {
 581                         /* It has no '.' in it, it must be a nick. */
 582                         mask.append("!*@*");
 583                 }
 584                 else
 585                 {
 586                         /* Got a dot in it? Has to be a host */
 587                         mask = "*!*@" + mask;
 588                 }
 589         }
 590         else if ((pos_of_pling == std::string::npos) && (pos_of_at != std::string::npos))
 591         {
 592                 /* Has an @ but no !, its a user@host */
 593                  mask = "*!" + mask;
 594         }
 595         else if ((pos_of_pling != std::string::npos) && (pos_of_at == std::string::npos))
 596         {
 597                 /* Has a ! but no @, it must be a nick!ident */
 598                 mask.append("@*");
 599         }
 600 }
 601
 602 bool ModeParser::AddMode(ModeHandler* mh, unsigned const char modeletter)
 603 {
 604         unsigned char mask = 0;
 605         unsigned char pos = 0;
 606
 607         /* Yes, i know, this might let people declare modes like '_' or '^'.
 608          * If they do that, thats their problem, and if i ever EVER see an
 609          * official InspIRCd developer do that, i'll beat them with a paddle!
 610          */
 611         if ((mh->GetModeChar() < 'A') || (mh->GetModeChar() > 'z'))
 612                 return false;
 613
 614         /* A mode prefix of ',' is not acceptable, it would fuck up server to server.
 615          * A mode prefix of ':' will fuck up both server to server, and client to server.
 616          * A mode prefix of '#' will mess up /whois and /privmsg
 617          */
 618         if ((mh->GetPrefix() == ',') || (mh->GetPrefix() == ':') || (mh->GetPrefix() == '#'))
 619                 return false;
 620
 621         mh->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
 622         pos = (mh->GetModeChar()-65) | mask;
 623
 624         if (modehandlers[pos])
 625                 return false;
 626
 627         modehandlers[pos] = mh;
 628         ServerInstance->Log(DEBUG,"ModeParser::AddMode: added mode %c",mh->GetModeChar());
 629         return true;
 630 }
 631
 632 bool ModeParser::DelMode(ModeHandler* mh)
 633 {
 634         unsigned char mask = 0;
 635         unsigned char pos = 0;
 636
 637         if ((mh->GetModeChar() < 'A') || (mh->GetModeChar() > 'z'))
 638                 return false;
 639
 640         mh->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
 641         pos = (mh->GetModeChar()-65) | mask;
 642
 643         if (!modehandlers[pos])
 644                 return false;
 645
 646         switch (mh->GetModeType())
 647         {
 648                 case MODETYPE_USER:
 649                         for (user_hash::iterator i = ServerInstance->clientlist.begin(); i != ServerInstance->clientlist.end(); i++)
 650                         {
 651                                 mh->RemoveMode(i->second);
 652                         }
 653                 break;
 654                 case MODETYPE_CHANNEL:
 655                         for (chan_hash::iterator i = ServerInstance->chanlist.begin(); i != ServerInstance->chanlist.end(); i++)
 656                         {
 657                                 mh->RemoveMode(i->second);
 658                         }
 659                 break;
 660         }
 661
 662         modehandlers[pos] = NULL;
 663
 664         return true;
 665 }
 666
 667 ModeHandler* ModeParser::FindMode(unsigned const char modeletter, ModeType mt)
 668 {
 669         unsigned char mask = 0;
 670         unsigned char pos = 0;
 671
 672         if ((modeletter < 'A') || (modeletter > 'z'))
 673                 return NULL;
 674
 675         mt == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
 676         pos = (modeletter-65) | mask;
 677
 678         return modehandlers[pos];
 679 }
 680
 681 std::string ModeParser::UserModeList()
 682 {
 683         char modestr[256];
 684         int pointer = 0;
 685
 686         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 687         {
 688                 unsigned char pos = (mode-65) | MASK_USER;
 689
 690                 if (modehandlers[pos])
 691                         modestr[pointer++] = mode;
 692         }
 693         modestr[pointer++] = 0;
 694         return modestr;
 695 }
 696
 697 std::string ModeParser::ChannelModeList()
 698 {
 699         char modestr[256];
 700         int pointer = 0;
 701
 702         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 703         {
 704                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 705
 706                 if (modehandlers[pos])
 707                         modestr[pointer++] = mode;
 708         }
 709         modestr[pointer++] = 0;
 710         return modestr;
 711 }
 712
 713 std::string ModeParser::ParaModeList()
 714 {
 715         char modestr[256];
 716         int pointer = 0;
 717
 718         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 719         {
 720                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 721
 722                 if ((modehandlers[pos]) && (modehandlers[pos]->GetNumParams(true)))
 723                         modestr[pointer++] = mode;
 724         }
 725         modestr[pointer++] = 0;
 726         return modestr;
 727 }
 728
 729 ModeHandler* ModeParser::FindPrefix(unsigned const char pfxletter)
 730 {
 731         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 732         {
 733                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 734
 735                 if ((modehandlers[pos]) && (modehandlers[pos]->GetPrefix() == pfxletter))
 736                 {
 737                         return modehandlers[pos];
 738                 }
 739         }
 740         return NULL;
 741 }
 742
 743 std::string ModeParser::ModeString(userrec* user, chanrec* channel)
 744 {
 745         std::string types;
 746         std::string pars;
 747
 748         if (!channel || !user)
 749                 return "";
 750
 751         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 752         {
 753                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 754                 ModeHandler* mh = modehandlers[pos];
 755                 if ((mh) && (mh->GetNumParams(true)) && (mh->GetNumParams(false)))
 756                 {
 757                         ModePair ret;
 758                         ret = mh->ModeSet(NULL, user, channel, user->nick);
 759                         if ((ret.first) && (ret.second == user->nick))
 760                         {
 761                                 pars.append(" ");
 762                                 pars.append(user->nick);
 763                                 types.push_back(mh->GetModeChar());
 764                         }
 765                 }
 766         }
 767
 768         return types+pars;
 769 }
 770
 771 std::string ModeParser::ChanModes()
 772 {
 773         std::string type1;      /* Listmodes EXCEPT those with a prefix */
 774         std::string type2;      /* Modes that take a param when adding or removing */
 775         std::string type3;      /* Modes that only take a param when adding */
 776         std::string type4;      /* Modes that dont take a param */
 777
 778         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 779         {
 780                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 781                  /* One parameter when adding */
 782                 if (modehandlers[pos])
 783                 {
 784                         if (modehandlers[pos]->GetNumParams(true))
 785                         {
 786                                 if ((modehandlers[pos]->IsListMode()) && (!modehandlers[pos]->GetPrefix()))
 787                                 {
 788                                         type1 += modehandlers[pos]->GetModeChar();
 789                                 }
 790                                 else
 791                                 {
 792                                         /* ... and one parameter when removing */
 793                                         if (modehandlers[pos]->GetNumParams(false))
 794                                         {
 795                                                 /* But not a list mode */
 796                                                 if (!modehandlers[pos]->GetPrefix())
 797                                                 {
 798                                                         type2 += modehandlers[pos]->GetModeChar();
 799                                                 }
 800                                         }
 801                                         else
 802                                         {
 803                                                 /* No parameters when removing */
 804                                                 type3 += modehandlers[pos]->GetModeChar();
 805                                         }
 806                                 }
 807                         }
 808                         else
 809                         {
 810                                 type4 += modehandlers[pos]->GetModeChar();
 811                         }
 812                 }
 813
 814         }
 815
 816         return type1 + "," + type2 + "," + type3 + "," + type4;
 817 }
 818
 819 bool ModeParser::PrefixComparison(const prefixtype one, const prefixtype two)
 820 {
 821         return one.second > two.second;
 822 }
 823
 824 std::string ModeParser::BuildPrefixes()
 825 {
 826         std::string mletters = "";
 827         std::string mprefixes = "";
 828         pfxcontainer pfx;
 829         std::map<char,char> prefix_to_mode;
 830
 831         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 832         {
 833                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 834
 835                 if ((modehandlers[pos]) && (modehandlers[pos]->GetPrefix()))
 836                 {
 837                         pfx.push_back(std::make_pair<char,unsigned int>(modehandlers[pos]->GetPrefix(), modehandlers[pos]->GetPrefixRank()));
 838                         prefix_to_mode[modehandlers[pos]->GetPrefix()] = modehandlers[pos]->GetModeChar();
 839                 }
 840         }
 841
 842         sort(pfx.begin(), pfx.end(), ModeParser::PrefixComparison);
 843
 844         for (pfxcontainer::iterator n = pfx.begin(); n != pfx.end(); n++)
 845         {
 846                 mletters = mletters + n->first;
 847                 mprefixes = mprefixes + prefix_to_mode.find(n->first)->second;
 848         }
 849
 850         return "(" + mprefixes + ")" + mletters;
 851 }
 852
 853 bool ModeParser::AddModeWatcher(ModeWatcher* mw)
 854 {
 855         unsigned char mask = 0;
 856         unsigned char pos = 0;
 857
 858         if (!mw)
 859                 return false;
 860
 861         if ((mw->GetModeChar() < 'A') || (mw->GetModeChar() > 'z'))
 862                 return false;
 863
 864         mw->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
 865         pos = (mw->GetModeChar()-65) | mask;
 866
 867         modewatchers[pos].push_back(mw);
 868         ServerInstance->Log(DEBUG,"ModeParser::AddModeWatcher: watching mode %c",mw->GetModeChar());
 869
 870         return true;
 871 }
 872
 873 bool ModeParser::DelModeWatcher(ModeWatcher* mw)
 874 {
 875         unsigned char mask = 0;
 876         unsigned char pos = 0;
 877
 878         if (!mw)
 879                 return false;
 880
 881         if ((mw->GetModeChar() < 'A') || (mw->GetModeChar() > 'z'))
 882                 return false;
 883
 884         mw->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
 885         pos = (mw->GetModeChar()-65) | mask;
 886
 887         ModeWatchIter a = find(modewatchers[pos].begin(),modewatchers[pos].end(),mw);
 888
 889         if (a == modewatchers[pos].end())
 890         {
 891                 ServerInstance->Log(DEBUG, "ModeParser::DelModeWatcher: Couldn't find watcher for mode %c in list", mw->GetModeChar());
 892                 return false;
 893         }
 894
 895         modewatchers[pos].erase(a);
 896         ServerInstance->Log(DEBUG,"ModeParser::DelModeWatcher: stopped watching mode %c",mw->GetModeChar());
 897
 898         return true;
 899 }
 900
 901 /** This default implementation can remove simple user modes
 902  */
 903 void ModeHandler::RemoveMode(userrec* user)
 904 {
 905         char moderemove[MAXBUF];
 906         const char* parameters[] = { user->nick, moderemove };
 907
 908         if (user->IsModeSet(this->GetModeChar()))
 909         {
 910                 sprintf(moderemove,"-%c",this->GetModeChar());
 911                 ServerInstance->Parser->CallHandler("MODE", parameters, 2, user);
 912         }
 913 }
 914
 915 /** This default implementation can remove simple channel modes
 916  * (no parameters)
 917  */
 918 void ModeHandler::RemoveMode(chanrec* channel)
 919 {
 920         char moderemove[MAXBUF];
 921         const char* parameters[] = { channel->name, moderemove };
 922
 923         if (channel->IsModeSet(this->GetModeChar()))
 924         {
 925                 userrec* n = new userrec(ServerInstance);
 926
 927                 sprintf(moderemove,"-%c",this->GetModeChar());
 928                 n->SetFd(FD_MAGIC_NUMBER);
 929
 930                 ServerInstance->SendMode(parameters, 2, n);
 931
 932                 delete n;
 933         }
 934 }
 935
 936 ModeParser::ModeParser(InspIRCd* Instance) : ServerInstance(Instance)
 937 {
 938         /* Clear mode list */
 939         memset(modehandlers, 0, sizeof(modehandlers));
 940         memset(modewatchers, 0, sizeof(modewatchers));
 941
 942         /* Last parse string */
 943         LastParse = "";
 944
 945         /* Initialise the RFC mode letters */
 946
 947         /* Start with channel simple modes, no params */
 948         this->AddMode(new ModeChannelSecret(Instance), 's');
 949         this->AddMode(new ModeChannelPrivate(Instance), 'p');
 950         this->AddMode(new ModeChannelModerated(Instance), 'm');
 951         this->AddMode(new ModeChannelTopicOps(Instance), 't');
 952         this->AddMode(new ModeChannelNoExternal(Instance), 'n');
 953         this->AddMode(new ModeChannelInviteOnly(Instance), 'i');
 954
 955         /* Cannel modes with params */
 956         this->AddMode(new ModeChannelKey(Instance), 'k');
 957         this->AddMode(new ModeChannelLimit(Instance), 'l');
 958
 959         /* Channel listmodes */
 960         this->AddMode(new ModeChannelBan(Instance), 'b');
 961         this->AddMode(new ModeChannelOp(Instance), 'o');
 962         this->AddMode(new ModeChannelHalfOp(Instance), 'h');
 963         this->AddMode(new ModeChannelVoice(Instance), 'v');
 964
 965         /* Now for usermodes */
 966         this->AddMode(new ModeUserServerNotice(Instance), 's');
 967         this->AddMode(new ModeUserWallops(Instance), 'w');
 968         this->AddMode(new ModeUserInvisible(Instance), 'i');
 969         this->AddMode(new ModeUserOperator(Instance), 'o');
 970         this->AddMode(new ModeUserServerNoticeMask(Instance), 'n');
 971 }