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         for (std::vector<ucrec*>::const_iterator i = d->chans.begin(); i != d->chans.end(); i++)
 179         {
 180                 ucrec* n = (ucrec*)(*i);
 181                 if (n->channel == chan)
 182                 {
 183                         if (n->uc_modes & MASK)
 184                         {
 185                                 return "";
 186                         }
 187                         n->uc_modes = n->uc_modes | MASK;
 188                         switch (MASK)
 189                         {
 190                                 case UCMODE_OP:
 191                                         n->channel->AddOppedUser(d);
 192                                 break;
 193                                 case UCMODE_HOP:
 194                                         n->channel->AddHalfoppedUser(d);
 195                                 break;
 196                                 case UCMODE_VOICE:
 197                                         n->channel->AddVoicedUser(d);
 198                                 break;
 199                         }
 200                         ServerInstance->Log(DEBUG,"grant: %s %s",n->channel->name,d->nick);
 201                         return d->nick;
 202                 }
 203         }
 204         return "";
 205 }
 206
 207 const char* ModeParser::Revoke(userrec *d,chanrec *chan,int MASK)
 208 {
 209         if (!chan)
 210                 return "";
 211
 212         for (std::vector<ucrec*>::const_iterator i = d->chans.begin(); i != d->chans.end(); i++)
 213         {
 214                 ucrec* n = (ucrec*)(*i);
 215                 if (n->channel == chan)
 216                 {
 217                         if ((n->uc_modes & MASK) == 0)
 218                         {
 219                                 return "";
 220                         }
 221                         n->uc_modes ^= MASK;
 222                         switch (MASK)
 223                         {
 224                                 case UCMODE_OP:
 225                                         n->channel->DelOppedUser(d);
 226                                 break;
 227                                 case UCMODE_HOP:
 228                                         n->channel->DelHalfoppedUser(d);
 229                                 break;
 230                                 case UCMODE_VOICE:
 231                                         n->channel->DelVoicedUser(d);
 232                                 break;
 233                         }
 234                         ServerInstance->Log(DEBUG,"revoke: %s %s",n->channel->name,d->nick);
 235                         return d->nick;
 236                 }
 237         }
 238         return "";
 239 }
 240
 241 void ModeParser::DisplayCurrentModes(userrec *user, userrec* targetuser, chanrec* targetchannel, const char* text)
 242 {
 243         if (targetchannel)
 244         {
 245                 /* Display channel's current mode string */
 246                 user->WriteServ("324 %s %s +%s",user->nick, targetchannel->name, targetchannel->ChanModes(targetchannel->HasUser(user)));
 247                 user->WriteServ("329 %s %s %lu", user->nick, targetchannel->name, (unsigned long)targetchannel->age);
 248                 return;
 249         }
 250         else if (targetuser)
 251         {
 252                 if ((targetuser == user) || (*user->oper))
 253                 {
 254                         /* Display user's current mode string */
 255                         user->WriteServ("221 %s :+%s",targetuser->nick,targetuser->FormatModes());
 256                         if (*targetuser->oper)
 257                                 user->WriteServ("008 %s +%s :Server notice mask", targetuser->nick, targetuser->FormatNoticeMasks());
 258                         return;
 259                 }
 260                 else
 261                 {
 262                         user->WriteServ("502 %s :Can't change mode for other users", user->nick);
 263                 }
 264         }
 265
 266         /* No such nick/channel */
 267         user->WriteServ("401 %s %s :No such nick/channel",user->nick, text);
 268         return;
 269 }
 270
 271 void ModeParser::Process(const char** parameters, int pcnt, userrec *user, bool servermode)
 272 {
 273         std::string target = parameters[0];
 274         ModeType type = MODETYPE_USER;
 275         unsigned char mask = 0;
 276         chanrec* targetchannel = ServerInstance->FindChan(parameters[0]);
 277         userrec* targetuser  = ServerInstance->FindNick(parameters[0]);
 278
 279         ServerInstance->Log(DEBUG,"ModeParser::Process start: pcnt=%d",pcnt);
 280         for (int j = 0; j < pcnt; j++)
 281                 ServerInstance->Log(DEBUG,"    parameters[%d] = '%s'", j, parameters[j]);
 282
 283         LastParse = "";
 284
 285         /* Special case for displaying the list for listmodes,
 286          * e.g. MODE #chan b, or MODE #chan +b without a parameter
 287          */
 288         if ((targetchannel) && (pcnt == 2))
 289         {
 290                 ServerInstance->Log(DEBUG,"Spool list");
 291                 const char* mode = parameters[1];
 292                 if (*mode == '+')
 293                         mode++;
 294                 unsigned char handler_id = ((*mode) - 65) | MASK_CHANNEL;
 295                 ModeHandler* mh = modehandlers[handler_id];
 296                 if ((mh) && (mh->IsListMode()))
 297                 {
 298                         mh->DisplayList(user, targetchannel);
 299                         return;
 300                 }
 301         }
 302
 303         if (pcnt == 1)
 304         {
 305                 ServerInstance->Log(DEBUG,"Mode list request");
 306                 this->DisplayCurrentModes(user, targetuser, targetchannel, parameters[0]);
 307         }
 308         else if (pcnt > 1)
 309         {
 310                 ServerInstance->Log(DEBUG,"More than one parameter");
 311
 312                 if (targetchannel)
 313                 {
 314                         type = MODETYPE_CHANNEL;
 315                         mask = MASK_CHANNEL;
 316
 317                         /* Extra security checks on channel modes
 318                          * (e.g. are they a (half)op?
 319                          */
 320
 321                         if ((IS_LOCAL(user)) && (targetchannel->GetStatus(user) < STATUS_HOP))
 322                         {
 323                                 /* We don't have halfop */
 324                                 ServerInstance->Log(DEBUG,"The user is not a halfop or above, checking other reasons for being able to set the modes");
 325
 326                                 int MOD_RESULT = 0;
 327                                 FOREACH_RESULT(I_OnAccessCheck,OnAccessCheck(user, NULL, targetchannel, AC_GENERAL_MODE));
 328                                 if (MOD_RESULT == ACR_DENY)
 329                                         return;
 330
 331                                 if (MOD_RESULT == ACR_DEFAULT)
 332                                 {
 333                                         /* Are we a uline or is it a servermode? */
 334                                         if ((!ServerInstance->ULine(user->server)) && (!servermode))
 335                                         {
 336                                                 /* Not enough permission:
 337                                                  * NOT a uline and NOT a servermode,
 338                                                  * OR, NOT halfop or above.
 339                                                  */
 340                                                 user->WriteServ("482 %s %s :You're not a channel (half)operator",user->nick, targetchannel->name);
 341                                                 return;
 342                                         }
 343                                 }
 344                         }
 345                 }
 346                 else if (targetuser)
 347                 {
 348                         type = MODETYPE_USER;
 349                         mask = MASK_USER;
 350                         if ((user != targetuser) && (!ServerInstance->ULine(user->server)))
 351                         {
 352                                 user->WriteServ("502 %s :Can't change mode for other users", user->nick);
 353                                 return;
 354                         }
 355                 }
 356                 else
 357                 {
 358                         /* No such nick/channel */
 359                         user->WriteServ("401 %s %s :No such nick/channel",user->nick, parameters[0]);
 360                         return;
 361                 }
 362
 363                 std::string mode_sequence = parameters[1];
 364                 std::string parameter = "";
 365                 std::ostringstream parameter_list;
 366                 std::string output_sequence = "";
 367                 bool adding = true, state_change = false;
 368                 unsigned char handler_id = 0;
 369                 int parameter_counter = 2; /* Index of first parameter */
 370                 int parameter_count = 0;
 371
 372                 /* A mode sequence that doesnt start with + or -. Assume +. - Thanks for the suggestion spike (bug#132) */
 373                 if ((*mode_sequence.begin() != '+') && (*mode_sequence.begin() != '-'))
 374                         mode_sequence.insert(0, "+");
 375
 376                 for (std::string::const_iterator letter = mode_sequence.begin(); letter != mode_sequence.end(); letter++)
 377                 {
 378                         unsigned char modechar = *letter;
 379
 380                         ServerInstance->Log(DEBUG,"Process letter %c", modechar);
 381
 382                         switch (modechar)
 383                         {
 384                                 /* NB:
 385                                  * For + and - mode characters, we don't just stick the character into the output sequence.
 386                                  * This is because the user may do something dumb, like: +-+ooo or +oo-+. To prevent this
 387                                  * appearing in the output sequence, we store a flag which says there was a state change,
 388                                  * which is set on any + or -, however, the + or - that we finish on is only appended to
 389                                  * the output stream in the event it is followed by a non "+ or -" character, such as o or v.
 390                                  */
 391                                 case '+':
 392                                         /* The following expression prevents: +o+o nick nick, compressing it to +oo nick nick,
 393                                          * however, will allow the + if it is the first item in the sequence, regardless.
 394                                          */
 395                                         if ((!adding) || (!output_sequence.length()))
 396                                                 state_change = true;
 397                                         adding = true;
 398                                         continue;
 399                                 break;
 400                                 case '-':
 401                                         if ((adding) || (!output_sequence.length()))
 402                                                 state_change = true;
 403                                         adding = false;
 404                                         continue;
 405                                 break;
 406                                 default:
 407
 408                                         /**
 409                                          * Watch carefully for the sleight of hand trick.
 410                                          * 65 is the ascii value of 'A'. We take this from
 411                                          * the char we're looking at to get a number between
 412                                          * 1 and 127. We then logic-or it to get the hashed
 413                                          * position, dependent on wether its a channel or
 414                                          * a user mode. This is a little stranger, but a lot
 415                                          * faster, than using a map of pairs.
 416                                          */
 417                                         handler_id = (modechar - 65) | mask;
 418
 419                                         if (modehandlers[handler_id])
 420                                         {
 421                                                 bool abort = false;
 422
 423                                                 for (ModeWatchIter watchers = modewatchers[handler_id].begin(); watchers != modewatchers[handler_id].end(); watchers++)
 424                                                 {
 425                                                         if ((*watchers)->BeforeMode(user, targetuser, targetchannel, parameter, adding, type) == MODEACTION_DENY)
 426                                                                 abort = true;
 427                                                 }
 428                                                 if ((modehandlers[handler_id]->GetModeType() == type) && (!abort))
 429                                                 {
 430                                                         if (modehandlers[handler_id]->GetNumParams(adding))
 431                                                         {
 432                                                                 /* This mode expects a parameter, do we have any parameters left in our list to use? */
 433                                                                 if (parameter_counter < pcnt)
 434                                                                 {
 435                                                                         ServerInstance->Log(DEBUG,"parameter_counter = %d, pcnt = %d", parameter_counter, pcnt);
 436                                                                         parameter = parameters[parameter_counter++];
 437
 438                                                                         /* Yerk, invalid! */
 439                                                                         if ((parameter.find(':') == 0) || (parameter.rfind(' ') != std::string::npos))
 440                                                                                 parameter = "";
 441                                                                 }
 442                                                                 else
 443                                                                 {
 444                                                                         /* No parameter, continue to the next mode */
 445                                                                         continue;
 446                                                                 }
 447                                                         }
 448
 449                                                         /* It's an oper only mode, check if theyre an oper. If they arent,
 450                                                          * eat any parameter that  came with the mode, and continue to next
 451                                                          */
 452                                                         if ((IS_LOCAL(user)) && (modehandlers[handler_id]->NeedsOper()) && (!*user->oper))
 453                                                         {
 454                                                                 user->WriteServ("481 %s :Permission Denied- Only IRC operators may %sset %s mode %c", user->nick,
 455                                                                                 adding ? "" : "un", type == MODETYPE_CHANNEL ? "channel" : "user",
 456                                                                                 modehandlers[handler_id]->GetModeChar());
 457                                                                 continue;
 458                                                         }
 459
 460                                                         /* Call the handler for the mode */
 461                                                         ModeAction ma = modehandlers[handler_id]->OnModeChange(user, targetuser, targetchannel, parameter, adding);
 462
 463                                                         if ((modehandlers[handler_id]->GetNumParams(adding)) && (parameter == ""))
 464                                                         {
 465                                                                 /* The handler nuked the parameter and they are supposed to have one.
 466                                                                  * We CANT continue now, even if they actually returned MODEACTION_ALLOW,
 467                                                                  * so we bail to the next mode character.
 468                                                                  */
 469                                                                 continue;
 470                                                         }
 471
 472                                                         if (ma == MODEACTION_ALLOW)
 473                                                         {
 474                                                                 /* We're about to output a valid mode letter - was there previously a pending state-change? */
 475                                                                 if (state_change)
 476                                                                         output_sequence.append(adding ? "+" : "-");
 477
 478                                                                 /* Add the mode letter */
 479                                                                 output_sequence.push_back(modechar);
 480
 481                                                                 /* Is there a valid parameter for this mode? If so add it to the parameter list */
 482                                                                 if ((modehandlers[handler_id]->GetNumParams(adding)) && (parameter != ""))
 483                                                                 {
 484                                                                         parameter_list << " " << parameter;
 485                                                                         parameter_count++;
 486                                                                         /* Does this mode have a prefix? */
 487                                                                         if (modehandlers[handler_id]->GetPrefix() && targetchannel)
 488                                                                         {
 489                                                                                 userrec* user_to_prefix = ServerInstance->FindNick(parameter);
 490                                                                                 if (user_to_prefix)
 491                                                                                         targetchannel->SetPrefix(user_to_prefix, modehandlers[handler_id]->GetPrefix(),
 492                                                                                                         modehandlers[handler_id]->GetPrefixRank(), adding);
 493                                                                         }
 494                                                                 }
 495
 496                                                                 /* Call all the AfterMode events in the mode watchers for this mode */
 497                                                                 for (ModeWatchIter watchers = modewatchers[handler_id].begin(); watchers != modewatchers[handler_id].end(); watchers++)
 498                                                                         (*watchers)->AfterMode(user, targetuser, targetchannel, parameter, adding, type);
 499
 500                                                                 /* Reset the state change flag */
 501                                                                 state_change = false;
 502
 503                                                                 if ((output_sequence.length() + parameter_list.str().length() > 450) || (output_sequence.length() > 100)
 504                                                                                 || (parameter_count > MAXMODES))
 505                                                                 {
 506                                                                         /* We cant have a mode sequence this long */
 507                                                                         letter = mode_sequence.end() - 1;
 508                                                                         continue;
 509                                                                 }
 510                                                         }
 511                                                 }
 512                                         }
 513                                         else
 514                                         {
 515                                                 /* No mode handler? Unknown mode character then. */
 516                                                 user->WriteServ("472 %s %c :is unknown mode char to me",user->nick, modechar);
 517                                         }
 518                                 break;
 519                         }
 520                 }
 521                 /* Was there at least one valid mode in the sequence? */
 522                 if (output_sequence != "")
 523                 {
 524                         if (servermode)
 525                         {
 526                                 if (type == MODETYPE_CHANNEL)
 527                                 {
 528                                         targetchannel->WriteChannelWithServ(ServerInstance->Config->ServerName, "MODE %s %s%s", targetchannel->name, output_sequence.c_str(), parameter_list.str().c_str());
 529                                         this->LastParse = targetchannel->name;
 530                                 }
 531                                 else
 532                                 {
 533                                         targetuser->WriteServ("MODE %s %s%s",targetuser->nick,output_sequence.c_str(), parameter_list.str().c_str());
 534                                         this->LastParse = targetuser->nick;
 535                                 }
 536                         }
 537                         else
 538                         {
 539                                 if (type == MODETYPE_CHANNEL)
 540                                 {
 541                                         ServerInstance->Log(DEBUG,"Write output sequence and parameters to channel: %s %s%s",targetchannel->name,output_sequence.c_str(),parameter_list.str().c_str());
 542                                         targetchannel->WriteChannel(user,"MODE %s %s%s",targetchannel->name,output_sequence.c_str(),parameter_list.str().c_str());
 543                                         FOREACH_MOD(I_OnMode,OnMode(user, targetchannel, TYPE_CHANNEL, output_sequence + parameter_list.str()));
 544                                         this->LastParse = targetchannel->name;
 545                                 }
 546                                 else
 547                                 {
 548                                         user->WriteTo(targetuser,"MODE %s %s%s",targetuser->nick,output_sequence.c_str(), parameter_list.str().c_str());
 549                                         FOREACH_MOD(I_OnMode,OnMode(user, targetuser, TYPE_USER, output_sequence + parameter_list.str()));
 550                                         this->LastParse = targetuser->nick;
 551                                 }
 552                         }
 553
 554                         LastParse.append(" ");
 555                         LastParse.append(output_sequence);
 556                         LastParse.append(parameter_list.str());
 557                 }
 558         }
 559 }
 560
 561 const std::string& ModeParser::GetLastParse()
 562 {
 563         return LastParse;
 564 }
 565
 566 void ModeParser::CleanMask(std::string &mask)
 567 {
 568         std::string::size_type pos_of_pling = mask.find_first_of('!');
 569         std::string::size_type pos_of_at = mask.find_first_of('@');
 570         std::string::size_type pos_of_dot = mask.find_first_of('.');
 571         std::string::size_type pos_of_colon = mask.find_first_of(':'); /* Because ipv6 addresses are colon delimited */
 572
 573         if ((pos_of_pling == std::string::npos) && (pos_of_at == std::string::npos))
 574         {
 575                 /* Just a nick, or just a host */
 576                 if ((pos_of_dot == std::string::npos) && (pos_of_colon == std::string::npos))
 577                 {
 578                         /* It has no '.' in it, it must be a nick. */
 579                         mask.append("!*@*");
 580                 }
 581                 else
 582                 {
 583                         /* Got a dot in it? Has to be a host */
 584                         mask = "*!*@" + mask;
 585                 }
 586         }
 587         else if ((pos_of_pling == std::string::npos) && (pos_of_at != std::string::npos))
 588         {
 589                 /* Has an @ but no !, its a user@host */
 590                  mask = "*!" + mask;
 591         }
 592         else if ((pos_of_pling != std::string::npos) && (pos_of_at == std::string::npos))
 593         {
 594                 /* Has a ! but no @, it must be a nick!ident */
 595                 mask.append("@*");
 596         }
 597 }
 598
 599 bool ModeParser::AddMode(ModeHandler* mh, unsigned const char modeletter)
 600 {
 601         unsigned char mask = 0;
 602         unsigned char pos = 0;
 603
 604         /* Yes, i know, this might let people declare modes like '_' or '^'.
 605          * If they do that, thats their problem, and if i ever EVER see an
 606          * official InspIRCd developer do that, i'll beat them with a paddle!
 607          */
 608         if ((mh->GetModeChar() < 'A') || (mh->GetModeChar() > 'z'))
 609                 return false;
 610
 611         /* A mode prefix of ',' is not acceptable, it would fuck up server to server.
 612          * A mode prefix of ':' will fuck up both server to server, and client to server.
 613          * A mode prefix of '#' will mess up /whois and /privmsg
 614          */
 615         if ((mh->GetPrefix() == ',') || (mh->GetPrefix() == ':') || (mh->GetPrefix() == '#'))
 616                 return false;
 617
 618         mh->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
 619         pos = (mh->GetModeChar()-65) | mask;
 620
 621         if (modehandlers[pos])
 622                 return false;
 623
 624         modehandlers[pos] = mh;
 625         ServerInstance->Log(DEBUG,"ModeParser::AddMode: added mode %c",mh->GetModeChar());
 626         return true;
 627 }
 628
 629 bool ModeParser::DelMode(ModeHandler* mh)
 630 {
 631         unsigned char mask = 0;
 632         unsigned char pos = 0;
 633
 634         if ((mh->GetModeChar() < 'A') || (mh->GetModeChar() > 'z'))
 635                 return false;
 636
 637         mh->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
 638         pos = (mh->GetModeChar()-65) | mask;
 639
 640         if (!modehandlers[pos])
 641                 return false;
 642
 643         switch (mh->GetModeType())
 644         {
 645                 case MODETYPE_USER:
 646                         for (user_hash::iterator i = ServerInstance->clientlist.begin(); i != ServerInstance->clientlist.end(); i++)
 647                         {
 648                                 mh->RemoveMode(i->second);
 649                         }
 650                 break;
 651                 case MODETYPE_CHANNEL:
 652                         for (chan_hash::iterator i = ServerInstance->chanlist.begin(); i != ServerInstance->chanlist.end(); i++)
 653                         {
 654                                 mh->RemoveMode(i->second);
 655                         }
 656                 break;
 657         }
 658
 659         modehandlers[pos] = NULL;
 660
 661         return true;
 662 }
 663
 664 ModeHandler* ModeParser::FindMode(unsigned const char modeletter, ModeType mt)
 665 {
 666         unsigned char mask = 0;
 667         unsigned char pos = 0;
 668
 669         if ((modeletter < 'A') || (modeletter > 'z'))
 670                 return NULL;
 671
 672         mt == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
 673         pos = (modeletter-65) | mask;
 674
 675         return modehandlers[pos];
 676 }
 677
 678 std::string ModeParser::UserModeList()
 679 {
 680         char modestr[256];
 681         int pointer = 0;
 682
 683         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 684         {
 685                 unsigned char pos = (mode-65) | MASK_USER;
 686
 687                 if (modehandlers[pos])
 688                         modestr[pointer++] = mode;
 689         }
 690         modestr[pointer++] = 0;
 691         return modestr;
 692 }
 693
 694 std::string ModeParser::ChannelModeList()
 695 {
 696         char modestr[256];
 697         int pointer = 0;
 698
 699         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 700         {
 701                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 702
 703                 if (modehandlers[pos])
 704                         modestr[pointer++] = mode;
 705         }
 706         modestr[pointer++] = 0;
 707         return modestr;
 708 }
 709
 710 std::string ModeParser::ParaModeList()
 711 {
 712         char modestr[256];
 713         int pointer = 0;
 714
 715         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 716         {
 717                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 718
 719                 if ((modehandlers[pos]) && (modehandlers[pos]->GetNumParams(true)))
 720                         modestr[pointer++] = mode;
 721         }
 722         modestr[pointer++] = 0;
 723         return modestr;
 724 }
 725
 726 ModeHandler* ModeParser::FindPrefix(unsigned const char pfxletter)
 727 {
 728         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 729         {
 730                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 731
 732                 if ((modehandlers[pos]) && (modehandlers[pos]->GetPrefix() == pfxletter))
 733                 {
 734                         return modehandlers[pos];
 735                 }
 736         }
 737         return NULL;
 738 }
 739
 740 std::string ModeParser::ModeString(userrec* user, chanrec* channel)
 741 {
 742         std::string types;
 743         std::string pars;
 744
 745         if (!channel || !user)
 746                 return "";
 747
 748         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 749         {
 750                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 751                 ModeHandler* mh = modehandlers[pos];
 752                 if ((mh) && (mh->GetNumParams(true)) && (mh->GetNumParams(false)))
 753                 {
 754                         ModePair ret;
 755                         ret = mh->ModeSet(NULL, user, channel, user->nick);
 756                         if ((ret.first) && (ret.second == user->nick))
 757                         {
 758                                 pars.append(" ");
 759                                 pars.append(user->nick);
 760                                 types.push_back(mh->GetModeChar());
 761                         }
 762                 }
 763         }
 764
 765         return types+pars;
 766 }
 767
 768 std::string ModeParser::ChanModes()
 769 {
 770         std::string type1;      /* Listmodes EXCEPT those with a prefix */
 771         std::string type2;      /* Modes that take a param when adding or removing */
 772         std::string type3;      /* Modes that only take a param when adding */
 773         std::string type4;      /* Modes that dont take a param */
 774
 775         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 776         {
 777                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 778                  /* One parameter when adding */
 779                 if (modehandlers[pos])
 780                 {
 781                         if (modehandlers[pos]->GetNumParams(true))
 782                         {
 783                                 if ((modehandlers[pos]->IsListMode()) && (!modehandlers[pos]->GetPrefix()))
 784                                 {
 785                                         type1 += modehandlers[pos]->GetModeChar();
 786                                 }
 787                                 else
 788                                 {
 789                                         /* ... and one parameter when removing */
 790                                         if (modehandlers[pos]->GetNumParams(false))
 791                                         {
 792                                                 /* But not a list mode */
 793                                                 if (!modehandlers[pos]->GetPrefix())
 794                                                 {
 795                                                         type2 += modehandlers[pos]->GetModeChar();
 796                                                 }
 797                                         }
 798                                         else
 799                                         {
 800                                                 /* No parameters when removing */
 801                                                 type3 += modehandlers[pos]->GetModeChar();
 802                                         }
 803                                 }
 804                         }
 805                         else
 806                         {
 807                                 type4 += modehandlers[pos]->GetModeChar();
 808                         }
 809                 }
 810
 811         }
 812
 813         return type1 + "," + type2 + "," + type3 + "," + type4;
 814 }
 815
 816 bool ModeParser::PrefixComparison(const prefixtype one, const prefixtype two)
 817 {
 818         return one.second > two.second;
 819 }
 820
 821 std::string ModeParser::BuildPrefixes()
 822 {
 823         std::string mletters = "";
 824         std::string mprefixes = "";
 825         pfxcontainer pfx;
 826         std::map<char,char> prefix_to_mode;
 827
 828         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 829         {
 830                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 831
 832                 if ((modehandlers[pos]) && (modehandlers[pos]->GetPrefix()))
 833                 {
 834                         pfx.push_back(std::make_pair<char,unsigned int>(modehandlers[pos]->GetPrefix(), modehandlers[pos]->GetPrefixRank()));
 835                         prefix_to_mode[modehandlers[pos]->GetPrefix()] = modehandlers[pos]->GetModeChar();
 836                 }
 837         }
 838
 839         sort(pfx.begin(), pfx.end(), ModeParser::PrefixComparison);
 840
 841         for (pfxcontainer::iterator n = pfx.begin(); n != pfx.end(); n++)
 842         {
 843                 mletters = mletters + n->first;
 844                 mprefixes = mprefixes + prefix_to_mode.find(n->first)->second;
 845         }
 846
 847         return "(" + mprefixes + ")" + mletters;
 848 }
 849
 850 bool ModeParser::AddModeWatcher(ModeWatcher* mw)
 851 {
 852         unsigned char mask = 0;
 853         unsigned char pos = 0;
 854
 855         if (!mw)
 856                 return false;
 857
 858         if ((mw->GetModeChar() < 'A') || (mw->GetModeChar() > 'z'))
 859                 return false;
 860
 861         mw->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
 862         pos = (mw->GetModeChar()-65) | mask;
 863
 864         modewatchers[pos].push_back(mw);
 865         ServerInstance->Log(DEBUG,"ModeParser::AddModeWatcher: watching mode %c",mw->GetModeChar());
 866
 867         return true;
 868 }
 869
 870 bool ModeParser::DelModeWatcher(ModeWatcher* mw)
 871 {
 872         unsigned char mask = 0;
 873         unsigned char pos = 0;
 874
 875         if (!mw)
 876                 return false;
 877
 878         if ((mw->GetModeChar() < 'A') || (mw->GetModeChar() > 'z'))
 879                 return false;
 880
 881         mw->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
 882         pos = (mw->GetModeChar()-65) | mask;
 883
 884         ModeWatchIter a = find(modewatchers[pos].begin(),modewatchers[pos].end(),mw);
 885
 886         if (a == modewatchers[pos].end())
 887         {
 888                 ServerInstance->Log(DEBUG, "ModeParser::DelModeWatcher: Couldn't find watcher for mode %c in list", mw->GetModeChar());
 889                 return false;
 890         }
 891
 892         modewatchers[pos].erase(a);
 893         ServerInstance->Log(DEBUG,"ModeParser::DelModeWatcher: stopped watching mode %c",mw->GetModeChar());
 894
 895         return true;
 896 }
 897
 898 /** This default implementation can remove simple user modes
 899  */
 900 void ModeHandler::RemoveMode(userrec* user)
 901 {
 902         char moderemove[MAXBUF];
 903         const char* parameters[] = { user->nick, moderemove };
 904
 905         if (user->IsModeSet(this->GetModeChar()))
 906         {
 907                 sprintf(moderemove,"-%c",this->GetModeChar());
 908                 ServerInstance->Parser->CallHandler("MODE", parameters, 2, user);
 909         }
 910 }
 911
 912 /** This default implementation can remove simple channel modes
 913  * (no parameters)
 914  */
 915 void ModeHandler::RemoveMode(chanrec* channel)
 916 {
 917         char moderemove[MAXBUF];
 918         const char* parameters[] = { channel->name, moderemove };
 919
 920         if (channel->IsModeSet(this->GetModeChar()))
 921         {
 922                 userrec* n = new userrec(ServerInstance);
 923
 924                 sprintf(moderemove,"-%c",this->GetModeChar());
 925                 n->SetFd(FD_MAGIC_NUMBER);
 926
 927                 ServerInstance->SendMode(parameters, 2, n);
 928
 929                 delete n;
 930         }
 931 }
 932
 933 ModeParser::ModeParser(InspIRCd* Instance) : ServerInstance(Instance)
 934 {
 935         /* Clear mode list */
 936         memset(modehandlers, 0, sizeof(modehandlers));
 937         memset(modewatchers, 0, sizeof(modewatchers));
 938
 939         /* Last parse string */
 940         LastParse = "";
 941
 942         /* Initialise the RFC mode letters */
 943
 944         /* Start with channel simple modes, no params */
 945         this->AddMode(new ModeChannelSecret(Instance), 's');
 946         this->AddMode(new ModeChannelPrivate(Instance), 'p');
 947         this->AddMode(new ModeChannelModerated(Instance), 'm');
 948         this->AddMode(new ModeChannelTopicOps(Instance), 't');
 949         this->AddMode(new ModeChannelNoExternal(Instance), 'n');
 950         this->AddMode(new ModeChannelInviteOnly(Instance), 'i');
 951
 952         /* Cannel modes with params */
 953         this->AddMode(new ModeChannelKey(Instance), 'k');
 954         this->AddMode(new ModeChannelLimit(Instance), 'l');
 955
 956         /* Channel listmodes */
 957         this->AddMode(new ModeChannelBan(Instance), 'b');
 958         this->AddMode(new ModeChannelOp(Instance), 'o');
 959         this->AddMode(new ModeChannelHalfOp(Instance), 'h');
 960         this->AddMode(new ModeChannelVoice(Instance), 'v');
 961
 962         /* Now for usermodes */
 963         this->AddMode(new ModeUserServerNotice(Instance), 's');
 964         this->AddMode(new ModeUserWallops(Instance), 'w');
 965         this->AddMode(new ModeUserInvisible(Instance), 'i');
 966         this->AddMode(new ModeUserOperator(Instance), 'o');
 967         this->AddMode(new ModeUserServerNoticeMask(Instance), 'n');
 968 }