src/mode.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2007 InspIRCd Development Team
   6  * See: http://www.inspircd.org/wiki/index.php/Credits
   7  *
   8  * This program is free but copyrighted software; see
   9  *            the file COPYING for details.
  10  *
  11  * ---------------------------------------------------
  12  */
  13
  14 #include "inspircd.h"
  15 #include "users.h"
  16 #include "modules.h"
  17 #include "inspstring.h"
  18 #include "mode.h"
  19
  20 /* +s (secret) */
  21 #include "modes/cmode_s.h"
  22 /* +p (private) */
  23 #include "modes/cmode_p.h"
  24 /* +b (bans) */
  25 #include "modes/cmode_b.h"
  26 /* +m (moderated) */
  27 #include "modes/cmode_m.h"
  28 /* +t (only (half) ops can change topic) */
  29 #include "modes/cmode_t.h"
  30 /* +n (no external messages) */
  31 #include "modes/cmode_n.h"
  32 /* +i (invite only) */
  33 #include "modes/cmode_i.h"
  34 /* +k (keyed channel) */
  35 #include "modes/cmode_k.h"
  36 /* +l (channel user limit) */
  37 #include "modes/cmode_l.h"
  38 /* +o (channel op) */
  39 #include "modes/cmode_o.h"
  40 /* +h (channel halfop) */
  41 #include "modes/cmode_h.h"
  42 /* +v (channel voice) */
  43 #include "modes/cmode_v.h"
  44 /* +s (server notices) */
  45 #include "modes/umode_s.h"
  46 /* +w (see wallops) */
  47 #include "modes/umode_w.h"
  48 /* +i (invisible) */
  49 #include "modes/umode_i.h"
  50 /* +o (operator) */
  51 #include "modes/umode_o.h"
  52 /* +n (notice mask - our implementation of snomasks) */
  53 #include "modes/umode_n.h"
  54
  55 ModeHandler::ModeHandler(InspIRCd* Instance, char modeletter, int parameters_on, int parameters_off, bool listmode, ModeType type, bool operonly, char mprefix)
  56         : ServerInstance(Instance), mode(modeletter), n_params_on(parameters_on), n_params_off(parameters_off), list(listmode), m_type(type), oper(operonly), prefix(mprefix), count(0)
  57 {
  58 }
  59
  60 ModeHandler::~ModeHandler()
  61 {
  62 }
  63
  64 bool ModeHandler::IsListMode()
  65 {
  66         return list;
  67 }
  68
  69 unsigned int ModeHandler::GetPrefixRank()
  70 {
  71         return 0;
  72 }
  73
  74 unsigned int ModeHandler::GetCount()
  75 {
  76         return 0;
  77 }
  78
  79 void ModeHandler::ChangeCount(int modifier)
  80 {
  81         count += modifier;
  82 }
  83
  84 ModeType ModeHandler::GetModeType()
  85 {
  86         return m_type;
  87 }
  88
  89 bool ModeHandler::NeedsOper()
  90 {
  91         return oper;
  92 }
  93
  94 char ModeHandler::GetPrefix()
  95 {
  96         return prefix;
  97 }
  98
  99 int ModeHandler::GetNumParams(bool adding)
 100 {
 101         return adding ? n_params_on : n_params_off;
 102 }
 103
 104 char ModeHandler::GetModeChar()
 105 {
 106         return mode;
 107 }
 108
 109 ModeAction ModeHandler::OnModeChange(userrec* source, userrec* dest, chanrec* channel, std::string &parameter, bool adding)
 110 {
 111         return MODEACTION_DENY;
 112 }
 113
 114 ModePair ModeHandler::ModeSet(userrec* source, userrec* dest, chanrec* channel, const std::string &parameter)
 115 {
 116         if (dest)
 117         {
 118                 return std::make_pair(dest->IsModeSet(this->mode), "");
 119         }
 120         else
 121         {
 122                 return std::make_pair(channel->IsModeSet(this->mode), "");
 123         }
 124 }
 125
 126 void ModeHandler::DisplayList(userrec* user, chanrec* channel)
 127 {
 128 }
 129
 130 bool ModeHandler::CheckTimeStamp(time_t theirs, time_t ours, const std::string &their_param, const std::string &our_param, chanrec* channel)
 131 {
 132         return (ours < theirs);
 133 }
 134
 135 ModeWatcher::ModeWatcher(InspIRCd* Instance, char modeletter, ModeType type) : ServerInstance(Instance), mode(modeletter), m_type(type)
 136 {
 137 }
 138
 139 ModeWatcher::~ModeWatcher()
 140 {
 141 }
 142
 143 char ModeWatcher::GetModeChar()
 144 {
 145         return mode;
 146 }
 147
 148 ModeType ModeWatcher::GetModeType()
 149 {
 150         return m_type;
 151 }
 152
 153 bool ModeWatcher::BeforeMode(userrec* source, userrec* dest, chanrec* channel, std::string &parameter, bool adding, ModeType type)
 154 {
 155         return true;
 156 }
 157
 158 void ModeWatcher::AfterMode(userrec* source, userrec* dest, chanrec* channel, const std::string &parameter, bool adding, ModeType type)
 159 {
 160 }
 161
 162 userrec* ModeParser::SanityChecks(userrec *user,const char *dest,chanrec *chan,int status)
 163 {
 164         userrec *d;
 165         if ((!user) || (!dest) || (!chan) || (!*dest))
 166         {
 167                 return NULL;
 168         }
 169         d = ServerInstance->FindNick(dest);
 170         if (!d)
 171         {
 172                 user->WriteServ("401 %s %s :No such nick/channel",user->nick, dest);
 173                 return NULL;
 174         }
 175         return d;
 176 }
 177
 178 const char* ModeParser::Grant(userrec *d,chanrec *chan,int MASK)
 179 {
 180         if (!chan)
 181                 return "";
 182
 183         UCListIter n = d->chans.find(chan);
 184         if (n != d->chans.end())
 185         {
 186                 if (n->second & MASK)
 187                 {
 188                         return "";
 189                 }
 190                 n->second = n->second | MASK;
 191                 switch (MASK)
 192                 {
 193                         case UCMODE_OP:
 194                                 n->first->AddOppedUser(d);
 195                         break;
 196                         case UCMODE_HOP:
 197                                 n->first->AddHalfoppedUser(d);
 198                         break;
 199                         case UCMODE_VOICE:
 200                                 n->first->AddVoicedUser(d);
 201                         break;
 202                 }
 203                 return d->nick;
 204         }
 205         return "";
 206 }
 207
 208 const char* ModeParser::Revoke(userrec *d,chanrec *chan,int MASK)
 209 {
 210         if (!chan)
 211                 return "";
 212
 213         UCListIter n = d->chans.find(chan);
 214         if (n != d->chans.end())
 215         {
 216                 if ((n->second & MASK) == 0)
 217                 {
 218                         return "";
 219                 }
 220                 n->second ^= MASK;
 221                 switch (MASK)
 222                 {
 223                         case UCMODE_OP:
 224                                 n->first->DelOppedUser(d);
 225                         break;
 226                         case UCMODE_HOP:
 227                                 n->first->DelHalfoppedUser(d);
 228                         break;
 229                         case UCMODE_VOICE:
 230                                 n->first->DelVoicedUser(d);
 231                         break;
 232                 }
 233                 return d->nick;
 234         }
 235         return "";
 236 }
 237
 238 void ModeParser::DisplayCurrentModes(userrec *user, userrec* targetuser, chanrec* targetchannel, const char* text)
 239 {
 240         if (targetchannel)
 241         {
 242                 /* Display channel's current mode string */
 243                 user->WriteServ("324 %s %s +%s",user->nick, targetchannel->name, targetchannel->ChanModes(targetchannel->HasUser(user)));
 244                 user->WriteServ("329 %s %s %lu", user->nick, targetchannel->name, (unsigned long)targetchannel->age);
 245                 return;
 246         }
 247         else if (targetuser)
 248         {
 249                 if (targetuser->Visibility && !targetuser->Visibility->VisibleTo(user))
 250                 {
 251                         user->WriteServ("401 %s %s :No such nick/channel",user->nick, text);
 252                         return;
 253                 }
 254
 255                 if ((targetuser == user) || (IS_OPER(user)))
 256                 {
 257                         /* Display user's current mode string */
 258                         user->WriteServ("221 %s :+%s",targetuser->nick,targetuser->FormatModes());
 259                         if (IS_OPER(targetuser))
 260                                 user->WriteServ("008 %s +%s :Server notice mask", targetuser->nick, targetuser->FormatNoticeMasks());
 261                         return;
 262                 }
 263                 else
 264                 {
 265                         user->WriteServ("502 %s :Can't change mode for other users", user->nick);
 266                         return;
 267                 }
 268         }
 269
 270         /* No such nick/channel */
 271         user->WriteServ("401 %s %s :No such nick/channel",user->nick, text);
 272         return;
 273 }
 274
 275 void ModeParser::Process(const char** parameters, int pcnt, userrec *user, bool servermode)
 276 {
 277         std::string target = parameters[0];
 278         ModeType type = MODETYPE_USER;
 279         unsigned char mask = 0;
 280         chanrec* targetchannel = ServerInstance->FindChan(parameters[0]);
 281         userrec* targetuser  = ServerInstance->FindNick(parameters[0]);
 282
 283         LastParse.clear();
 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                 const char* mode = parameters[1];
 291                 int nonlistmodes_found = 0;
 292                 bool sent[256];
 293
 294                 mask = MASK_CHANNEL;
 295
 296                 memset(&sent, 0, 256);
 297
 298                 while (mode && *mode)
 299                 {
 300                         unsigned char mletter = *mode;
 301
 302                         if (*mode == '+')
 303                         {
 304                                 mode++;
 305                                 continue;
 306                         }
 307
 308                         /* Ensure the user doesnt request the same mode twice,
 309                          * so they cant flood themselves off out of idiocy.
 310                          */
 311                         if (!sent[mletter])
 312                         {
 313                                 sent[mletter] = true;
 314                         }
 315                         else
 316                         {
 317                                 mode++;
 318                                 continue;
 319                         }
 320
 321                         ModeHandler *mh = this->FindMode(*mode, MODETYPE_CHANNEL);
 322                         bool display = true;
 323
 324                         if ((mh) && (mh->IsListMode()))
 325                         {
 326                                 if (ServerInstance->Config->HideModeLists[mletter] && (targetchannel->GetStatus(user) < STATUS_HOP))
 327                                 {
 328                                         user->WriteServ("482 %s %s :Only half-operators and above may view the +%c list",user->nick, targetchannel->name, *mode++);
 329                                         continue;
 330                                 }
 331
 332                                 /** See below for a description of what craq this is :D
 333                                  */
 334                                 unsigned char handler_id = (*mode - 65) | mask;
 335
 336                                 for(ModeWatchIter watchers = modewatchers[handler_id].begin(); watchers != modewatchers[handler_id].end(); watchers++)
 337                                 {
 338                                         std::string dummyparam;
 339
 340                                         if (!((*watchers)->BeforeMode(user, NULL, targetchannel, dummyparam, true, MODETYPE_CHANNEL)))
 341                                                 display = false;
 342                                 }
 343
 344                                 if (display)
 345                                         mh->DisplayList(user, targetchannel);
 346                         }
 347                         else
 348                                 nonlistmodes_found++;
 349
 350                         mode++;
 351                 }
 352
 353                 /* We didnt have any modes that were non-list, we can return here */
 354                 if (!nonlistmodes_found)
 355                         return;
 356         }
 357
 358         if (pcnt == 1)
 359         {
 360                 this->DisplayCurrentModes(user, targetuser, targetchannel, parameters[0]);
 361         }
 362         else if (pcnt > 1)
 363         {
 364                 if (targetchannel)
 365                 {
 366                         type = MODETYPE_CHANNEL;
 367                         mask = MASK_CHANNEL;
 368
 369                         /* Extra security checks on channel modes
 370                          * (e.g. are they a (half)op?
 371                          */
 372
 373                         if ((IS_LOCAL(user)) && (targetchannel->GetStatus(user) < STATUS_HOP))
 374                         {
 375                                 /* We don't have halfop */
 376                                 int MOD_RESULT = 0;
 377                                 FOREACH_RESULT(I_OnAccessCheck,OnAccessCheck(user, NULL, targetchannel, AC_GENERAL_MODE));
 378                                 if (MOD_RESULT == ACR_DENY)
 379                                         return;
 380
 381                                 if (MOD_RESULT == ACR_DEFAULT)
 382                                 {
 383                                         /* Are we a uline or is it a servermode? */
 384                                         if ((!ServerInstance->ULine(user->server)) && (!servermode))
 385                                         {
 386                                                 /* Not enough permission:
 387                                                  * NOT a uline and NOT a servermode,
 388                                                  * OR, NOT halfop or above.
 389                                                  */
 390                                                 user->WriteServ("482 %s %s :You're not a channel (half)operator",user->nick, targetchannel->name);
 391                                                 return;
 392                                         }
 393                                 }
 394                         }
 395                 }
 396                 else if (targetuser)
 397                 {
 398                         type = MODETYPE_USER;
 399                         mask = MASK_USER;
 400                         if ((user != targetuser) && (!ServerInstance->ULine(user->server)))
 401                         {
 402                                 user->WriteServ("502 %s :Can't change mode for other users", user->nick);
 403                                 return;
 404                         }
 405                 }
 406                 else
 407                 {
 408                         /* No such nick/channel */
 409                         user->WriteServ("401 %s %s :No such nick/channel",user->nick, parameters[0]);
 410                         return;
 411                 }
 412
 413                 std::string mode_sequence = parameters[1];
 414                 std::string parameter;
 415                 std::ostringstream parameter_list;
 416                 std::string output_sequence;
 417                 bool adding = true, state_change = false;
 418                 unsigned char handler_id = 0;
 419                 int parameter_counter = 2; /* Index of first parameter */
 420                 int parameter_count = 0;
 421                 bool last_successful_state_change = false;
 422
 423                 /* A mode sequence that doesnt start with + or -. Assume +. - Thanks for the suggestion spike (bug#132) */
 424                 if ((*mode_sequence.begin() != '+') && (*mode_sequence.begin() != '-'))
 425                         mode_sequence.insert(0, "+");
 426
 427                 for (std::string::const_iterator letter = mode_sequence.begin(); letter != mode_sequence.end(); letter++)
 428                 {
 429                         unsigned char modechar = *letter;
 430
 431                         switch (modechar)
 432                         {
 433                                 /* NB:
 434                                  * For + and - mode characters, we don't just stick the character into the output sequence.
 435                                  * This is because the user may do something dumb, like: +-+ooo or +oo-+. To prevent this
 436                                  * appearing in the output sequence, we store a flag which says there was a state change,
 437                                  * which is set on any + or -, however, the + or - that we finish on is only appended to
 438                                  * the output stream in the event it is followed by a non "+ or -" character, such as o or v.
 439                                  */
 440                                 case '+':
 441                                         /* The following expression prevents: +o+o nick nick, compressing it to +oo nick nick,
 442                                          * however, will allow the + if it is the first item in the sequence, regardless.
 443                                          */
 444                                         if ((!adding) || (!output_sequence.length()))
 445                                                 state_change = true;
 446                                         adding = true;
 447                                         if (!output_sequence.length())
 448                                                 last_successful_state_change = false;
 449                                         continue;
 450                                 break;
 451                                 case '-':
 452                                         if ((adding) || (!output_sequence.length()))
 453                                                 state_change = true;
 454                                         adding = false;
 455                                         if (!output_sequence.length())
 456                                                 last_successful_state_change = true;
 457                                         continue;
 458                                 break;
 459                                 default:
 460
 461                                         /**
 462                                          * Watch carefully for the sleight of hand trick.
 463                                          * 65 is the ascii value of 'A'. We take this from
 464                                          * the char we're looking at to get a number between
 465                                          * 1 and 127. We then logic-or it to get the hashed
 466                                          * position, dependent on wether its a channel or
 467                                          * a user mode. This is a little stranger, but a lot
 468                                          * faster, than using a map of pairs.
 469                                          */
 470                                         handler_id = (modechar - 65) | mask;
 471
 472                                         if (modehandlers[handler_id])
 473                                         {
 474                                                 bool abort = false;
 475
 476                                                 if (modehandlers[handler_id]->GetModeType() == type)
 477                                                 {
 478                                                         if (modehandlers[handler_id]->GetNumParams(adding))
 479                                                         {
 480                                                                 /* This mode expects a parameter, do we have any parameters left in our list to use? */
 481                                                                 if (parameter_counter < pcnt)
 482                                                                 {
 483                                                                         parameter = parameters[parameter_counter++];
 484
 485                                                                         /* Yerk, invalid! */
 486                                                                         if ((parameter.find(':') == 0) || (parameter.rfind(' ') != std::string::npos))
 487                                                                                 parameter.clear();
 488                                                                 }
 489                                                                 else
 490                                                                 {
 491                                                                         /* No parameter, continue to the next mode */
 492                                                                         continue;
 493                                                                 }
 494
 495                                                                 bool had_parameter = !parameter.empty();
 496
 497                                                                 for (ModeWatchIter watchers = modewatchers[handler_id].begin(); watchers != modewatchers[handler_id].end(); watchers++)
 498                                                                 {
 499                                                                         if ((*watchers)->BeforeMode(user, targetuser, targetchannel, parameter, adding, type) == false)
 500                                                                         {
 501                                                                                 abort = true;
 502                                                                                 break;
 503                                                                         }
 504                                                                         /* A module whacked the parameter completely, and there was one. abort. */
 505                                                                         if ((had_parameter) && (parameter.empty()))
 506                                                                         {
 507                                                                                 abort = true;
 508                                                                                 break;
 509                                                                         }
 510                                                                 }
 511
 512                                                                 if (abort)
 513                                                                         continue;
 514                                                         }
 515                                                         else
 516                                                         {
 517                                                                 /* Fix by brain: mode watchers not being called for parameterless modes */
 518                                                                 for (ModeWatchIter watchers = modewatchers[handler_id].begin(); watchers != modewatchers[handler_id].end(); watchers++)
 519                                                                 {
 520                                                                         if ((*watchers)->BeforeMode(user, targetuser, targetchannel, parameter, adding, type) == false)
 521                                                                         {
 522                                                                                 abort = true;
 523                                                                                 break;
 524                                                                         }
 525                                                                 }
 526
 527                                                                 if (abort)
 528                                                                         continue;
 529                                                         }
 530
 531                                                         /* It's an oper only mode, check if theyre an oper. If they arent,
 532                                                          * eat any parameter that  came with the mode, and continue to next
 533                                                          */
 534                                                         if ((IS_LOCAL(user)) && (modehandlers[handler_id]->NeedsOper()) && (!IS_OPER(user)))
 535                                                         {
 536                                                                 user->WriteServ("481 %s :Permission Denied - Only IRC operators may %sset %s mode %c", user->nick,
 537                                                                                 adding ? "" : "un", type == MODETYPE_CHANNEL ? "channel" : "user",
 538                                                                                 modehandlers[handler_id]->GetModeChar());
 539                                                                 continue;
 540                                                         }
 541
 542                                                         /* Call the handler for the mode */
 543                                                         ModeAction ma = modehandlers[handler_id]->OnModeChange(user, targetuser, targetchannel, parameter, adding);
 544
 545                                                         if ((modehandlers[handler_id]->GetNumParams(adding)) && (parameter.empty()))
 546                                                         {
 547                                                                 /* The handler nuked the parameter and they are supposed to have one.
 548                                                                  * We CANT continue now, even if they actually returned MODEACTION_ALLOW,
 549                                                                  * so we bail to the next mode character.
 550                                                                  */
 551                                                                 continue;
 552                                                         }
 553
 554                                                         if (ma == MODEACTION_ALLOW)
 555                                                         {
 556                                                                 /* We're about to output a valid mode letter - was there previously a pending state-change? */
 557                                                                 if (state_change)
 558                                                                 {
 559                                                                         if (adding != last_successful_state_change)
 560                                                                                 output_sequence.append(adding ? "+" : "-");
 561                                                                         last_successful_state_change = adding;
 562                                                                 }
 563
 564                                                                 /* Add the mode letter */
 565                                                                 output_sequence.push_back(modechar);
 566
 567                                                                 /* Is there a valid parameter for this mode? If so add it to the parameter list */
 568                                                                 if ((modehandlers[handler_id]->GetNumParams(adding)) && (!parameter.empty()))
 569                                                                 {
 570                                                                         parameter_list << " " << parameter;
 571                                                                         parameter_count++;
 572                                                                         /* Does this mode have a prefix? */
 573                                                                         if (modehandlers[handler_id]->GetPrefix() && targetchannel)
 574                                                                         {
 575                                                                                 userrec* user_to_prefix = ServerInstance->FindNick(parameter);
 576                                                                                 if (user_to_prefix)
 577                                                                                         targetchannel->SetPrefix(user_to_prefix, modehandlers[handler_id]->GetPrefix(),
 578                                                                                                         modehandlers[handler_id]->GetPrefixRank(), adding);
 579                                                                         }
 580                                                                 }
 581
 582                                                                 /* Call all the AfterMode events in the mode watchers for this mode */
 583                                                                 for (ModeWatchIter watchers = modewatchers[handler_id].begin(); watchers != modewatchers[handler_id].end(); watchers++)
 584                                                                         (*watchers)->AfterMode(user, targetuser, targetchannel, parameter, adding, type);
 585
 586                                                                 /* Reset the state change flag */
 587                                                                 state_change = false;
 588
 589                                                                 if ((output_sequence.length() + parameter_list.str().length() > 450) || (output_sequence.length() > 100)
 590                                                                                 || (parameter_count > MAXMODES))
 591                                                                 {
 592                                                                         /* We cant have a mode sequence this long */
 593                                                                         letter = mode_sequence.end() - 1;
 594                                                                         continue;
 595                                                                 }
 596                                                         }
 597                                                 }
 598                                         }
 599                                         else
 600                                         {
 601                                                 /* No mode handler? Unknown mode character then. */
 602                                                 user->WriteServ("472 %s %c :is unknown mode char to me",user->nick, modechar);
 603                                         }
 604                                 break;
 605                         }
 606                 }
 607
 608                 /* Was there at least one valid mode in the sequence? */
 609                 if (!output_sequence.empty())
 610                 {
 611                         if (servermode)
 612                         {
 613                                 if (type == MODETYPE_CHANNEL)
 614                                 {
 615                                         targetchannel->WriteChannelWithServ(ServerInstance->Config->ServerName, "MODE %s %s%s", targetchannel->name, output_sequence.c_str(), parameter_list.str().c_str());
 616                                         this->LastParse = targetchannel->name;
 617                                 }
 618                                 else
 619                                 {
 620                                         targetuser->WriteServ("MODE %s %s%s",targetuser->nick,output_sequence.c_str(), parameter_list.str().c_str());
 621                                         this->LastParse = targetuser->nick;
 622                                 }
 623                         }
 624                         else
 625                         {
 626                                 if (type == MODETYPE_CHANNEL)
 627                                 {
 628                                         targetchannel->WriteChannel(user,"MODE %s %s%s",targetchannel->name,output_sequence.c_str(),parameter_list.str().c_str());
 629                                         FOREACH_MOD(I_OnMode,OnMode(user, targetchannel, TYPE_CHANNEL, output_sequence + parameter_list.str()));
 630                                         this->LastParse = targetchannel->name;
 631                                 }
 632                                 else
 633                                 {
 634                                         user->WriteTo(targetuser,"MODE %s %s%s",targetuser->nick,output_sequence.c_str(), parameter_list.str().c_str());
 635                                         FOREACH_MOD(I_OnMode,OnMode(user, targetuser, TYPE_USER, output_sequence + parameter_list.str()));
 636                                         this->LastParse = targetuser->nick;
 637                                 }
 638                         }
 639
 640                         LastParse.append(" ");
 641                         LastParse.append(output_sequence);
 642                         LastParse.append(parameter_list.str());
 643                 }
 644         }
 645 }
 646
 647 const std::string& ModeParser::GetLastParse()
 648 {
 649         return LastParse;
 650 }
 651
 652 void ModeParser::CleanMask(std::string &mask)
 653 {
 654         std::string::size_type pos_of_pling = mask.find_first_of('!');
 655         std::string::size_type pos_of_at = mask.find_first_of('@');
 656         std::string::size_type pos_of_dot = mask.find_first_of('.');
 657         std::string::size_type pos_of_colon = mask.find_first_of(':'); /* Because ipv6 addresses are colon delimited */
 658
 659         if ((pos_of_pling == std::string::npos) && (pos_of_at == std::string::npos))
 660         {
 661                 /* Just a nick, or just a host */
 662                 if ((pos_of_dot == std::string::npos) && (pos_of_colon == std::string::npos))
 663                 {
 664                         /* It has no '.' in it, it must be a nick. */
 665                         mask.append("!*@*");
 666                 }
 667                 else
 668                 {
 669                         /* Got a dot in it? Has to be a host */
 670                         mask = "*!*@" + mask;
 671                 }
 672         }
 673         else if ((pos_of_pling == std::string::npos) && (pos_of_at != std::string::npos))
 674         {
 675                 /* Has an @ but no !, its a user@host */
 676                  mask = "*!" + mask;
 677         }
 678         else if ((pos_of_pling != std::string::npos) && (pos_of_at == std::string::npos))
 679         {
 680                 /* Has a ! but no @, it must be a nick!ident */
 681                 mask.append("@*");
 682         }
 683 }
 684
 685 bool ModeParser::AddMode(ModeHandler* mh, unsigned const char modeletter)
 686 {
 687         unsigned char mask = 0;
 688         unsigned char pos = 0;
 689
 690         /* Yes, i know, this might let people declare modes like '_' or '^'.
 691          * If they do that, thats their problem, and if i ever EVER see an
 692          * official InspIRCd developer do that, i'll beat them with a paddle!
 693          */
 694         if ((mh->GetModeChar() < 'A') || (mh->GetModeChar() > 'z') || (mh->GetPrefix() > 126))
 695                 return false;
 696
 697         /* A mode prefix of ',' is not acceptable, it would fuck up server to server.
 698          * A mode prefix of ':' will fuck up both server to server, and client to server.
 699          * A mode prefix of '#' will mess up /whois and /privmsg
 700          */
 701         if ((mh->GetPrefix() == ',') || (mh->GetPrefix() == ':') || (mh->GetPrefix() == '#'))
 702                 return false;
 703
 704         mh->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
 705         pos = (mh->GetModeChar()-65) | mask;
 706
 707         if (modehandlers[pos])
 708                 return false;
 709
 710         modehandlers[pos] = mh;
 711         return true;
 712 }
 713
 714 bool ModeParser::DelMode(ModeHandler* mh)
 715 {
 716         unsigned char mask = 0;
 717         unsigned char pos = 0;
 718
 719         if ((mh->GetModeChar() < 'A') || (mh->GetModeChar() > 'z'))
 720                 return false;
 721
 722         mh->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
 723         pos = (mh->GetModeChar()-65) | mask;
 724
 725         if (!modehandlers[pos])
 726                 return false;
 727
 728         switch (mh->GetModeType())
 729         {
 730                 case MODETYPE_USER:
 731                         for (user_hash::iterator i = ServerInstance->clientlist->begin(); i != ServerInstance->clientlist->end(); i++)
 732                         {
 733                                 mh->RemoveMode(i->second);
 734                         }
 735                 break;
 736                 case MODETYPE_CHANNEL:
 737                         for (chan_hash::iterator i = ServerInstance->chanlist->begin(); i != ServerInstance->chanlist->end(); i++)
 738                         {
 739                                 mh->RemoveMode(i->second);
 740                         }
 741                 break;
 742         }
 743
 744         modehandlers[pos] = NULL;
 745
 746         return true;
 747 }
 748
 749 ModeHandler* ModeParser::FindMode(unsigned const char modeletter, ModeType mt)
 750 {
 751         unsigned char mask = 0;
 752         unsigned char pos = 0;
 753
 754         if ((modeletter < 'A') || (modeletter > 'z'))
 755                 return NULL;
 756
 757         mt == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
 758         pos = (modeletter-65) | mask;
 759
 760         return modehandlers[pos];
 761 }
 762
 763 std::string ModeParser::UserModeList()
 764 {
 765         char modestr[256];
 766         int pointer = 0;
 767
 768         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 769         {
 770                 unsigned char pos = (mode-65) | MASK_USER;
 771
 772                 if (modehandlers[pos])
 773                         modestr[pointer++] = mode;
 774         }
 775         modestr[pointer++] = 0;
 776         return modestr;
 777 }
 778
 779 std::string ModeParser::ChannelModeList()
 780 {
 781         char modestr[256];
 782         int pointer = 0;
 783
 784         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 785         {
 786                 if ((!ServerInstance->Config->AllowHalfop) && (mode == 'h'))
 787                         continue;
 788
 789                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 790
 791                 if (modehandlers[pos])
 792                         modestr[pointer++] = mode;
 793         }
 794         modestr[pointer++] = 0;
 795         return modestr;
 796 }
 797
 798 std::string ModeParser::ParaModeList()
 799 {
 800         char modestr[256];
 801         int pointer = 0;
 802
 803         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 804         {
 805                 if ((!ServerInstance->Config->AllowHalfop) && (mode == 'h'))
 806                         continue;
 807
 808                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 809
 810                 if ((modehandlers[pos]) && (modehandlers[pos]->GetNumParams(true)))
 811                         modestr[pointer++] = mode;
 812         }
 813         modestr[pointer++] = 0;
 814         return modestr;
 815 }
 816
 817 ModeHandler* ModeParser::FindPrefix(unsigned const char pfxletter)
 818 {
 819         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 820         {
 821                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 822
 823                 if ((modehandlers[pos]) && (modehandlers[pos]->GetPrefix() == pfxletter))
 824                 {
 825                         return modehandlers[pos];
 826                 }
 827         }
 828         return NULL;
 829 }
 830
 831 std::string ModeParser::ModeString(userrec* user, chanrec* channel)
 832 {
 833         std::string types;
 834         std::string pars;
 835
 836         if (!channel || !user)
 837                 return "";
 838
 839         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 840         {
 841                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 842                 ModeHandler* mh = modehandlers[pos];
 843                 if ((mh) && (mh->GetNumParams(true)) && (mh->GetNumParams(false)))
 844                 {
 845                         ModePair ret;
 846                         ret = mh->ModeSet(NULL, user, channel, user->nick);
 847                         if ((ret.first) && (ret.second == user->nick))
 848                         {
 849                                 pars.append(" ");
 850                                 pars.append(user->nick);
 851                                 types.push_back(mh->GetModeChar());
 852                         }
 853                 }
 854         }
 855
 856         return types+pars;
 857 }
 858
 859 std::string ModeParser::ChanModes()
 860 {
 861         std::string type1;      /* Listmodes EXCEPT those with a prefix */
 862         std::string type2;      /* Modes that take a param when adding or removing */
 863         std::string type3;      /* Modes that only take a param when adding */
 864         std::string type4;      /* Modes that dont take a param */
 865
 866         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 867         {
 868                 if ((!ServerInstance->Config->AllowHalfop) && (mode == 'h'))
 869                         continue;
 870
 871                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 872                  /* One parameter when adding */
 873                 if (modehandlers[pos])
 874                 {
 875                         if (modehandlers[pos]->GetNumParams(true))
 876                         {
 877                                 if ((modehandlers[pos]->IsListMode()) && (!modehandlers[pos]->GetPrefix()))
 878                                 {
 879                                         type1 += modehandlers[pos]->GetModeChar();
 880                                 }
 881                                 else
 882                                 {
 883                                         /* ... and one parameter when removing */
 884                                         if (modehandlers[pos]->GetNumParams(false))
 885                                         {
 886                                                 /* But not a list mode */
 887                                                 if (!modehandlers[pos]->GetPrefix())
 888                                                 {
 889                                                         type2 += modehandlers[pos]->GetModeChar();
 890                                                 }
 891                                         }
 892                                         else
 893                                         {
 894                                                 /* No parameters when removing */
 895                                                 type3 += modehandlers[pos]->GetModeChar();
 896                                         }
 897                                 }
 898                         }
 899                         else
 900                         {
 901                                 type4 += modehandlers[pos]->GetModeChar();
 902                         }
 903                 }
 904
 905         }
 906
 907         return type1 + "," + type2 + "," + type3 + "," + type4;
 908 }
 909
 910 bool ModeParser::PrefixComparison(prefixtype one, prefixtype two)
 911 {
 912         return one.second > two.second;
 913 }
 914
 915 std::string ModeParser::BuildPrefixes()
 916 {
 917         std::string mletters;
 918         std::string mprefixes;
 919         pfxcontainer pfx;
 920         std::map<char,char> prefix_to_mode;
 921
 922         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 923         {
 924                 if ((!ServerInstance->Config->AllowHalfop) && (mode == 'h'))
 925                         continue;
 926
 927                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 928
 929                 if ((modehandlers[pos]) && (modehandlers[pos]->GetPrefix()))
 930                 {
 931                         pfx.push_back(std::make_pair<char,unsigned int>(modehandlers[pos]->GetPrefix(), modehandlers[pos]->GetPrefixRank()));
 932                         prefix_to_mode[modehandlers[pos]->GetPrefix()] = modehandlers[pos]->GetModeChar();
 933                 }
 934         }
 935
 936         sort(pfx.begin(), pfx.end(), ModeParser::PrefixComparison);
 937
 938         for (pfxcontainer::iterator n = pfx.begin(); n != pfx.end(); n++)
 939         {
 940                 mletters = mletters + n->first;
 941                 mprefixes = mprefixes + prefix_to_mode.find(n->first)->second;
 942         }
 943
 944         return "(" + mprefixes + ")" + mletters;
 945 }
 946
 947 bool ModeParser::AddModeWatcher(ModeWatcher* mw)
 948 {
 949         unsigned char mask = 0;
 950         unsigned char pos = 0;
 951
 952         if (!mw)
 953                 return false;
 954
 955         if ((mw->GetModeChar() < 'A') || (mw->GetModeChar() > 'z'))
 956                 return false;
 957
 958         mw->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
 959         pos = (mw->GetModeChar()-65) | mask;
 960
 961         modewatchers[pos].push_back(mw);
 962
 963         return true;
 964 }
 965
 966 bool ModeParser::DelModeWatcher(ModeWatcher* mw)
 967 {
 968         unsigned char mask = 0;
 969         unsigned char pos = 0;
 970
 971         if (!mw)
 972                 return false;
 973
 974         if ((mw->GetModeChar() < 'A') || (mw->GetModeChar() > 'z'))
 975                 return false;
 976
 977         mw->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
 978         pos = (mw->GetModeChar()-65) | mask;
 979
 980         ModeWatchIter a = find(modewatchers[pos].begin(),modewatchers[pos].end(),mw);
 981
 982         if (a == modewatchers[pos].end())
 983         {
 984                 return false;
 985         }
 986
 987         modewatchers[pos].erase(a);
 988
 989         return true;
 990 }
 991
 992 /** This default implementation can remove simple user modes
 993  */
 994 void ModeHandler::RemoveMode(userrec* user)
 995 {
 996         char moderemove[MAXBUF];
 997         const char* parameters[] = { user->nick, moderemove };
 998
 999         if (user->IsModeSet(this->GetModeChar()))
1000         {
1001                 sprintf(moderemove,"-%c",this->GetModeChar());
1002                 ServerInstance->Parser->CallHandler("MODE", parameters, 2, user);
1003         }
1004 }
1005
1006 /** This default implementation can remove simple channel modes
1007  * (no parameters)
1008  */
1009 void ModeHandler::RemoveMode(chanrec* channel)
1010 {
1011         char moderemove[MAXBUF];
1012         const char* parameters[] = { channel->name, moderemove };
1013
1014         if (channel->IsModeSet(this->GetModeChar()))
1015         {
1016                 userrec* n = new userrec(ServerInstance);
1017
1018                 sprintf(moderemove,"-%c",this->GetModeChar());
1019                 n->SetFd(FD_MAGIC_NUMBER);
1020
1021                 ServerInstance->SendMode(parameters, 2, n);
1022
1023                 delete n;
1024         }
1025 }
1026
1027 ModeParser::ModeParser(InspIRCd* Instance) : ServerInstance(Instance)
1028 {
1029         struct Initializer
1030         {
1031                 char modechar;
1032                 ModeHandler* handler;
1033         };
1034
1035         Initializer modes[] = {
1036                 { 's', new ModeChannelSecret(Instance) },
1037                 { 'p', new ModeChannelPrivate(Instance) },
1038                 { 'm', new ModeChannelModerated(Instance) },
1039                 { 't', new ModeChannelTopicOps(Instance) },
1040                 { 'n', new ModeChannelNoExternal(Instance) },
1041                 { 'i', new ModeChannelInviteOnly(Instance) },
1042                 { 'k', new ModeChannelKey(Instance) },
1043                 { 'l', new ModeChannelLimit(Instance) },
1044                 { 'b', new ModeChannelBan(Instance) },
1045                 { 'o', new ModeChannelOp(Instance) },
1046                 { 'h', new ModeChannelHalfOp(Instance) },
1047                 { 'v', new ModeChannelVoice(Instance) },
1048                 { 's', new ModeUserServerNotice(Instance) },
1049                 { 'w', new ModeUserWallops(Instance) },
1050                 { 'i', new ModeUserInvisible(Instance) },
1051                 { 'o', new ModeUserOperator(Instance) },
1052                 { 'n', new ModeUserServerNoticeMask(Instance) },
1053                 { 0, NULL }
1054         };
1055
1056         /* Clear mode list */
1057         memset(modehandlers, 0, sizeof(modehandlers));
1058         memset(modewatchers, 0, sizeof(modewatchers));
1059
1060         /* Last parse string */
1061         LastParse.clear();
1062
1063         /* Initialise the RFC mode letters */
1064         for (int index = 0; modes[index].modechar; index++)
1065                 this->AddMode(modes[index].handler, modes[index].modechar);
1066 }