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