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 == user) || (*user->oper))
 250                 {
 251                         /* Display user's current mode string */
 252                         user->WriteServ("221 %s :+%s",targetuser->nick,targetuser->FormatModes());
 253                         if (*targetuser->oper)
 254                                 user->WriteServ("008 %s +%s :Server notice mask", targetuser->nick, targetuser->FormatNoticeMasks());
 255                         return;
 256                 }
 257                 else
 258                 {
 259                         user->WriteServ("502 %s :Can't change mode for other users", user->nick);
 260                         return;
 261                 }
 262         }
 263
 264         /* No such nick/channel */
 265         user->WriteServ("401 %s %s :No such nick/channel",user->nick, text);
 266         return;
 267 }
 268
 269 void ModeParser::Process(const char** parameters, int pcnt, userrec *user, bool servermode)
 270 {
 271         std::string target = parameters[0];
 272         ModeType type = MODETYPE_USER;
 273         unsigned char mask = 0;
 274         chanrec* targetchannel = ServerInstance->FindChan(parameters[0]);
 275         userrec* targetuser  = ServerInstance->FindNick(parameters[0]);
 276
 277         LastParse = "";
 278
 279         /* Special case for displaying the list for listmodes,
 280          * e.g. MODE #chan b, or MODE #chan +b without a parameter
 281          */
 282         if ((targetchannel) && (pcnt == 2))
 283         {
 284                 const char* mode = parameters[1];
 285                 int nonlistmodes_found = 0;
 286                 bool sent[256];
 287
 288                 mask = MASK_CHANNEL;
 289
 290                 memset(&sent, 0, 256);
 291
 292                 while (mode && *mode)
 293                 {
 294                         if (*mode == '+')
 295                         {
 296                                 mode++;
 297                                 continue;
 298                         }
 299
 300                         /* Ensure the user doesnt request the same mode twice,
 301                          * so they cant flood themselves off out of idiocy.
 302                          */
 303                         if (!sent[*mode])
 304                         {
 305                                 sent[*mode] = true;
 306                         }
 307                         else
 308                         {
 309                                 mode++;
 310                                 continue;
 311                         }
 312
 313                         if (ServerInstance->Config->HideModeLists[*mode] && (targetchannel->GetStatus(user) < STATUS_HOP))
 314                         {
 315                                 user->WriteServ("482 %s %s :Only half-operators and above may view the +%c list",user->nick, targetchannel->name, *mode++);
 316                                 continue;
 317                         }
 318
 319                         ModeHandler *mh = this->FindMode(*mode, MODETYPE_CHANNEL);
 320                         bool display = true;
 321
 322                         if ((mh) && (mh->IsListMode()))
 323                         {
 324                                 /** See below for a description of what craq this is :D
 325                                  */
 326                                 unsigned char handler_id = (*mode - 65) | mask;
 327
 328                                 for(ModeWatchIter watchers = modewatchers[handler_id].begin(); watchers != modewatchers[handler_id].end(); watchers++)
 329                                 {
 330                                         std::string dummyparam;
 331
 332                                         if (!((*watchers)->BeforeMode(user, NULL, targetchannel, dummyparam, true, MODETYPE_CHANNEL)))
 333                                                 display = false;
 334                                 }
 335
 336                                 if (display)
 337                                         mh->DisplayList(user, targetchannel);
 338                         }
 339                         else
 340                                 nonlistmodes_found++;
 341
 342                         mode++;
 343                 }
 344
 345                 /* We didnt have any modes that were non-list, we can return here */
 346                 if (!nonlistmodes_found)
 347                         return;
 348         }
 349
 350         if (pcnt == 1)
 351         {
 352                 this->DisplayCurrentModes(user, targetuser, targetchannel, parameters[0]);
 353         }
 354         else if (pcnt > 1)
 355         {
 356                 if (targetchannel)
 357                 {
 358                         type = MODETYPE_CHANNEL;
 359                         mask = MASK_CHANNEL;
 360
 361                         /* Extra security checks on channel modes
 362                          * (e.g. are they a (half)op?
 363                          */
 364
 365                         if ((IS_LOCAL(user)) && (targetchannel->GetStatus(user) < STATUS_HOP))
 366                         {
 367                                 /* We don't have halfop */
 368                                 int MOD_RESULT = 0;
 369                                 FOREACH_RESULT(I_OnAccessCheck,OnAccessCheck(user, NULL, targetchannel, AC_GENERAL_MODE));
 370                                 if (MOD_RESULT == ACR_DENY)
 371                                         return;
 372
 373                                 if (MOD_RESULT == ACR_DEFAULT)
 374                                 {
 375                                         /* Are we a uline or is it a servermode? */
 376                                         if ((!ServerInstance->ULine(user->server)) && (!servermode))
 377                                         {
 378                                                 /* Not enough permission:
 379                                                  * NOT a uline and NOT a servermode,
 380                                                  * OR, NOT halfop or above.
 381                                                  */
 382                                                 user->WriteServ("482 %s %s :You're not a channel (half)operator",user->nick, targetchannel->name);
 383                                                 return;
 384                                         }
 385                                 }
 386                         }
 387                 }
 388                 else if (targetuser)
 389                 {
 390                         type = MODETYPE_USER;
 391                         mask = MASK_USER;
 392                         if ((user != targetuser) && (!ServerInstance->ULine(user->server)))
 393                         {
 394                                 user->WriteServ("502 %s :Can't change mode for other users", user->nick);
 395                                 return;
 396                         }
 397                 }
 398                 else
 399                 {
 400                         /* No such nick/channel */
 401                         user->WriteServ("401 %s %s :No such nick/channel",user->nick, parameters[0]);
 402                         return;
 403                 }
 404
 405                 std::string mode_sequence = parameters[1];
 406                 std::string parameter = "";
 407                 std::ostringstream parameter_list;
 408                 std::string output_sequence = "";
 409                 bool adding = true, state_change = false;
 410                 unsigned char handler_id = 0;
 411                 int parameter_counter = 2; /* Index of first parameter */
 412                 int parameter_count = 0;
 413                 bool last_successful_state_change = false;
 414
 415                 /* A mode sequence that doesnt start with + or -. Assume +. - Thanks for the suggestion spike (bug#132) */
 416                 if ((*mode_sequence.begin() != '+') && (*mode_sequence.begin() != '-'))
 417                         mode_sequence.insert(0, "+");
 418
 419                 for (std::string::const_iterator letter = mode_sequence.begin(); letter != mode_sequence.end(); letter++)
 420                 {
 421                         unsigned char modechar = *letter;
 422
 423                         switch (modechar)
 424                         {
 425                                 /* NB:
 426                                  * For + and - mode characters, we don't just stick the character into the output sequence.
 427                                  * This is because the user may do something dumb, like: +-+ooo or +oo-+. To prevent this
 428                                  * appearing in the output sequence, we store a flag which says there was a state change,
 429                                  * which is set on any + or -, however, the + or - that we finish on is only appended to
 430                                  * the output stream in the event it is followed by a non "+ or -" character, such as o or v.
 431                                  */
 432                                 case '+':
 433                                         /* The following expression prevents: +o+o nick nick, compressing it to +oo nick nick,
 434                                          * however, will allow the + if it is the first item in the sequence, regardless.
 435                                          */
 436                                         if ((!adding) || (!output_sequence.length()))
 437                                                 state_change = true;
 438                                         adding = true;
 439                                         if (!output_sequence.length())
 440                                                 last_successful_state_change = false;
 441                                         continue;
 442                                 break;
 443                                 case '-':
 444                                         if ((adding) || (!output_sequence.length()))
 445                                                 state_change = true;
 446                                         adding = false;
 447                                         if (!output_sequence.length())
 448                                                 last_successful_state_change = true;
 449                                         continue;
 450                                 break;
 451                                 default:
 452
 453                                         /**
 454                                          * Watch carefully for the sleight of hand trick.
 455                                          * 65 is the ascii value of 'A'. We take this from
 456                                          * the char we're looking at to get a number between
 457                                          * 1 and 127. We then logic-or it to get the hashed
 458                                          * position, dependent on wether its a channel or
 459                                          * a user mode. This is a little stranger, but a lot
 460                                          * faster, than using a map of pairs.
 461                                          */
 462                                         handler_id = (modechar - 65) | mask;
 463
 464                                         if (modehandlers[handler_id])
 465                                         {
 466                                                 bool abort = false;
 467
 468                                                 if (modehandlers[handler_id]->GetModeType() == type)
 469                                                 {
 470                                                         if (modehandlers[handler_id]->GetNumParams(adding))
 471                                                         {
 472                                                                 /* This mode expects a parameter, do we have any parameters left in our list to use? */
 473                                                                 if (parameter_counter < pcnt)
 474                                                                 {
 475                                                                         parameter = parameters[parameter_counter++];
 476
 477                                                                         /* Yerk, invalid! */
 478                                                                         if ((parameter.find(':') == 0) || (parameter.rfind(' ') != std::string::npos))
 479                                                                                 parameter = "";
 480                                                                 }
 481                                                                 else
 482                                                                 {
 483                                                                         /* No parameter, continue to the next mode */
 484                                                                         continue;
 485                                                                 }
 486
 487                                                                 bool had_parameter = !parameter.empty();
 488
 489                                                                 for (ModeWatchIter watchers = modewatchers[handler_id].begin(); watchers != modewatchers[handler_id].end(); watchers++)
 490                                                                 {
 491                                                                         if ((*watchers)->BeforeMode(user, targetuser, targetchannel, parameter, adding, type) == false)
 492                                                                         {
 493                                                                                 abort = true;
 494                                                                                 break;
 495                                                                         }
 496                                                                         /* A module whacked the parameter completely, and there was one. abort. */
 497                                                                         if ((had_parameter) && (parameter.empty()))
 498                                                                         {
 499                                                                                 abort = true;
 500                                                                                 break;
 501                                                                         }
 502                                                                 }
 503
 504                                                                 if (abort)
 505                                                                         continue;
 506                                                         }
 507
 508                                                         /* It's an oper only mode, check if theyre an oper. If they arent,
 509                                                          * eat any parameter that  came with the mode, and continue to next
 510                                                          */
 511                                                         if ((IS_LOCAL(user)) && (modehandlers[handler_id]->NeedsOper()) && (!*user->oper))
 512                                                         {
 513                                                                 user->WriteServ("481 %s :Permission Denied- Only IRC operators may %sset %s mode %c", user->nick,
 514                                                                                 adding ? "" : "un", type == MODETYPE_CHANNEL ? "channel" : "user",
 515                                                                                 modehandlers[handler_id]->GetModeChar());
 516                                                                 continue;
 517                                                         }
 518
 519                                                         /* Call the handler for the mode */
 520                                                         ModeAction ma = modehandlers[handler_id]->OnModeChange(user, targetuser, targetchannel, parameter, adding);
 521
 522                                                         if ((modehandlers[handler_id]->GetNumParams(adding)) && (parameter == ""))
 523                                                         {
 524                                                                 /* The handler nuked the parameter and they are supposed to have one.
 525                                                                  * We CANT continue now, even if they actually returned MODEACTION_ALLOW,
 526                                                                  * so we bail to the next mode character.
 527                                                                  */
 528                                                                 continue;
 529                                                         }
 530
 531                                                         if (ma == MODEACTION_ALLOW)
 532                                                         {
 533                                                                 /* We're about to output a valid mode letter - was there previously a pending state-change? */
 534                                                                 if (state_change)
 535                                                                 {
 536                                                                         if (adding != last_successful_state_change)
 537                                                                                 output_sequence.append(adding ? "+" : "-");
 538                                                                         last_successful_state_change = adding;
 539                                                                 }
 540
 541                                                                 /* Add the mode letter */
 542                                                                 output_sequence.push_back(modechar);
 543
 544                                                                 /* Is there a valid parameter for this mode? If so add it to the parameter list */
 545                                                                 if ((modehandlers[handler_id]->GetNumParams(adding)) && (parameter != ""))
 546                                                                 {
 547                                                                         parameter_list << " " << parameter;
 548                                                                         parameter_count++;
 549                                                                         /* Does this mode have a prefix? */
 550                                                                         if (modehandlers[handler_id]->GetPrefix() && targetchannel)
 551                                                                         {
 552                                                                                 userrec* user_to_prefix = ServerInstance->FindNick(parameter);
 553                                                                                 if (user_to_prefix)
 554                                                                                         targetchannel->SetPrefix(user_to_prefix, modehandlers[handler_id]->GetPrefix(),
 555                                                                                                         modehandlers[handler_id]->GetPrefixRank(), adding);
 556                                                                         }
 557                                                                 }
 558
 559                                                                 /* Call all the AfterMode events in the mode watchers for this mode */
 560                                                                 for (ModeWatchIter watchers = modewatchers[handler_id].begin(); watchers != modewatchers[handler_id].end(); watchers++)
 561                                                                         (*watchers)->AfterMode(user, targetuser, targetchannel, parameter, adding, type);
 562
 563                                                                 /* Reset the state change flag */
 564                                                                 state_change = false;
 565
 566                                                                 if ((output_sequence.length() + parameter_list.str().length() > 450) || (output_sequence.length() > 100)
 567                                                                                 || (parameter_count > MAXMODES))
 568                                                                 {
 569                                                                         /* We cant have a mode sequence this long */
 570                                                                         letter = mode_sequence.end() - 1;
 571                                                                         continue;
 572                                                                 }
 573                                                         }
 574                                                 }
 575                                         }
 576                                         else
 577                                         {
 578                                                 /* No mode handler? Unknown mode character then. */
 579                                                 user->WriteServ("472 %s %c :is unknown mode char to me",user->nick, modechar);
 580                                         }
 581                                 break;
 582                         }
 583                 }
 584                 /* Was there at least one valid mode in the sequence? */
 585                 if (output_sequence != "")
 586                 {
 587                         if (servermode)
 588                         {
 589                                 if (type == MODETYPE_CHANNEL)
 590                                 {
 591                                         targetchannel->WriteChannelWithServ(ServerInstance->Config->ServerName, "MODE %s %s%s", targetchannel->name, output_sequence.c_str(), parameter_list.str().c_str());
 592                                         this->LastParse = targetchannel->name;
 593                                 }
 594                                 else
 595                                 {
 596                                         targetuser->WriteServ("MODE %s %s%s",targetuser->nick,output_sequence.c_str(), parameter_list.str().c_str());
 597                                         this->LastParse = targetuser->nick;
 598                                 }
 599                         }
 600                         else
 601                         {
 602                                 if (type == MODETYPE_CHANNEL)
 603                                 {
 604                                         targetchannel->WriteChannel(user,"MODE %s %s%s",targetchannel->name,output_sequence.c_str(),parameter_list.str().c_str());
 605                                         FOREACH_MOD(I_OnMode,OnMode(user, targetchannel, TYPE_CHANNEL, output_sequence + parameter_list.str()));
 606                                         this->LastParse = targetchannel->name;
 607                                 }
 608                                 else
 609                                 {
 610                                         user->WriteTo(targetuser,"MODE %s %s%s",targetuser->nick,output_sequence.c_str(), parameter_list.str().c_str());
 611                                         FOREACH_MOD(I_OnMode,OnMode(user, targetuser, TYPE_USER, output_sequence + parameter_list.str()));
 612                                         this->LastParse = targetuser->nick;
 613                                 }
 614                         }
 615
 616                         LastParse.append(" ");
 617                         LastParse.append(output_sequence);
 618                         LastParse.append(parameter_list.str());
 619                 }
 620         }
 621 }
 622
 623 const std::string& ModeParser::GetLastParse()
 624 {
 625         return LastParse;
 626 }
 627
 628 void ModeParser::CleanMask(std::string &mask)
 629 {
 630         std::string::size_type pos_of_pling = mask.find_first_of('!');
 631         std::string::size_type pos_of_at = mask.find_first_of('@');
 632         std::string::size_type pos_of_dot = mask.find_first_of('.');
 633         std::string::size_type pos_of_colon = mask.find_first_of(':'); /* Because ipv6 addresses are colon delimited */
 634
 635         if ((pos_of_pling == std::string::npos) && (pos_of_at == std::string::npos))
 636         {
 637                 /* Just a nick, or just a host */
 638                 if ((pos_of_dot == std::string::npos) && (pos_of_colon == std::string::npos))
 639                 {
 640                         /* It has no '.' in it, it must be a nick. */
 641                         mask.append("!*@*");
 642                 }
 643                 else
 644                 {
 645                         /* Got a dot in it? Has to be a host */
 646                         mask = "*!*@" + mask;
 647                 }
 648         }
 649         else if ((pos_of_pling == std::string::npos) && (pos_of_at != std::string::npos))
 650         {
 651                 /* Has an @ but no !, its a user@host */
 652                  mask = "*!" + mask;
 653         }
 654         else if ((pos_of_pling != std::string::npos) && (pos_of_at == std::string::npos))
 655         {
 656                 /* Has a ! but no @, it must be a nick!ident */
 657                 mask.append("@*");
 658         }
 659 }
 660
 661 bool ModeParser::AddMode(ModeHandler* mh, unsigned const char modeletter)
 662 {
 663         unsigned char mask = 0;
 664         unsigned char pos = 0;
 665
 666         /* Yes, i know, this might let people declare modes like '_' or '^'.
 667          * If they do that, thats their problem, and if i ever EVER see an
 668          * official InspIRCd developer do that, i'll beat them with a paddle!
 669          */
 670         if ((mh->GetModeChar() < 'A') || (mh->GetModeChar() > 'z'))
 671                 return false;
 672
 673         /* A mode prefix of ',' is not acceptable, it would fuck up server to server.
 674          * A mode prefix of ':' will fuck up both server to server, and client to server.
 675          * A mode prefix of '#' will mess up /whois and /privmsg
 676          */
 677         if ((mh->GetPrefix() == ',') || (mh->GetPrefix() == ':') || (mh->GetPrefix() == '#'))
 678                 return false;
 679
 680         mh->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
 681         pos = (mh->GetModeChar()-65) | mask;
 682
 683         if (modehandlers[pos])
 684                 return false;
 685
 686         modehandlers[pos] = mh;
 687         return true;
 688 }
 689
 690 bool ModeParser::DelMode(ModeHandler* mh)
 691 {
 692         unsigned char mask = 0;
 693         unsigned char pos = 0;
 694
 695         if ((mh->GetModeChar() < 'A') || (mh->GetModeChar() > 'z'))
 696                 return false;
 697
 698         mh->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
 699         pos = (mh->GetModeChar()-65) | mask;
 700
 701         if (!modehandlers[pos])
 702                 return false;
 703
 704         switch (mh->GetModeType())
 705         {
 706                 case MODETYPE_USER:
 707                         for (user_hash::iterator i = ServerInstance->clientlist->begin(); i != ServerInstance->clientlist->end(); i++)
 708                         {
 709                                 mh->RemoveMode(i->second);
 710                         }
 711                 break;
 712                 case MODETYPE_CHANNEL:
 713                         for (chan_hash::iterator i = ServerInstance->chanlist->begin(); i != ServerInstance->chanlist->end(); i++)
 714                         {
 715                                 mh->RemoveMode(i->second);
 716                         }
 717                 break;
 718         }
 719
 720         modehandlers[pos] = NULL;
 721
 722         return true;
 723 }
 724
 725 ModeHandler* ModeParser::FindMode(unsigned const char modeletter, ModeType mt)
 726 {
 727         unsigned char mask = 0;
 728         unsigned char pos = 0;
 729
 730         if ((modeletter < 'A') || (modeletter > 'z'))
 731                 return NULL;
 732
 733         mt == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
 734         pos = (modeletter-65) | mask;
 735
 736         return modehandlers[pos];
 737 }
 738
 739 std::string ModeParser::UserModeList()
 740 {
 741         char modestr[256];
 742         int pointer = 0;
 743
 744         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 745         {
 746                 unsigned char pos = (mode-65) | MASK_USER;
 747
 748                 if (modehandlers[pos])
 749                         modestr[pointer++] = mode;
 750         }
 751         modestr[pointer++] = 0;
 752         return modestr;
 753 }
 754
 755 std::string ModeParser::ChannelModeList()
 756 {
 757         char modestr[256];
 758         int pointer = 0;
 759
 760         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 761         {
 762                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 763
 764                 if (modehandlers[pos])
 765                         modestr[pointer++] = mode;
 766         }
 767         modestr[pointer++] = 0;
 768         return modestr;
 769 }
 770
 771 std::string ModeParser::ParaModeList()
 772 {
 773         char modestr[256];
 774         int pointer = 0;
 775
 776         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 777         {
 778                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 779
 780                 if ((modehandlers[pos]) && (modehandlers[pos]->GetNumParams(true)))
 781                         modestr[pointer++] = mode;
 782         }
 783         modestr[pointer++] = 0;
 784         return modestr;
 785 }
 786
 787 ModeHandler* ModeParser::FindPrefix(unsigned const char pfxletter)
 788 {
 789         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 790         {
 791                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 792
 793                 if ((modehandlers[pos]) && (modehandlers[pos]->GetPrefix() == pfxletter))
 794                 {
 795                         return modehandlers[pos];
 796                 }
 797         }
 798         return NULL;
 799 }
 800
 801 std::string ModeParser::ModeString(userrec* user, chanrec* channel)
 802 {
 803         std::string types;
 804         std::string pars;
 805
 806         if (!channel || !user)
 807                 return "";
 808
 809         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 810         {
 811                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 812                 ModeHandler* mh = modehandlers[pos];
 813                 if ((mh) && (mh->GetNumParams(true)) && (mh->GetNumParams(false)))
 814                 {
 815                         ModePair ret;
 816                         ret = mh->ModeSet(NULL, user, channel, user->nick);
 817                         if ((ret.first) && (ret.second == user->nick))
 818                         {
 819                                 pars.append(" ");
 820                                 pars.append(user->nick);
 821                                 types.push_back(mh->GetModeChar());
 822                         }
 823                 }
 824         }
 825
 826         return types+pars;
 827 }
 828
 829 std::string ModeParser::ChanModes()
 830 {
 831         std::string type1;      /* Listmodes EXCEPT those with a prefix */
 832         std::string type2;      /* Modes that take a param when adding or removing */
 833         std::string type3;      /* Modes that only take a param when adding */
 834         std::string type4;      /* Modes that dont take a param */
 835
 836         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 837         {
 838                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 839                  /* One parameter when adding */
 840                 if (modehandlers[pos])
 841                 {
 842                         if (modehandlers[pos]->GetNumParams(true))
 843                         {
 844                                 if ((modehandlers[pos]->IsListMode()) && (!modehandlers[pos]->GetPrefix()))
 845                                 {
 846                                         type1 += modehandlers[pos]->GetModeChar();
 847                                 }
 848                                 else
 849                                 {
 850                                         /* ... and one parameter when removing */
 851                                         if (modehandlers[pos]->GetNumParams(false))
 852                                         {
 853                                                 /* But not a list mode */
 854                                                 if (!modehandlers[pos]->GetPrefix())
 855                                                 {
 856                                                         type2 += modehandlers[pos]->GetModeChar();
 857                                                 }
 858                                         }
 859                                         else
 860                                         {
 861                                                 /* No parameters when removing */
 862                                                 type3 += modehandlers[pos]->GetModeChar();
 863                                         }
 864                                 }
 865                         }
 866                         else
 867                         {
 868                                 type4 += modehandlers[pos]->GetModeChar();
 869                         }
 870                 }
 871
 872         }
 873
 874         return type1 + "," + type2 + "," + type3 + "," + type4;
 875 }
 876
 877 bool ModeParser::PrefixComparison(const prefixtype one, const prefixtype two)
 878 {
 879         return one.second > two.second;
 880 }
 881
 882 std::string ModeParser::BuildPrefixes()
 883 {
 884         std::string mletters = "";
 885         std::string mprefixes = "";
 886         pfxcontainer pfx;
 887         std::map<char,char> prefix_to_mode;
 888
 889         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 890         {
 891                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 892
 893                 if ((modehandlers[pos]) && (modehandlers[pos]->GetPrefix()))
 894                 {
 895                         pfx.push_back(std::make_pair<char,unsigned int>(modehandlers[pos]->GetPrefix(), modehandlers[pos]->GetPrefixRank()));
 896                         prefix_to_mode[modehandlers[pos]->GetPrefix()] = modehandlers[pos]->GetModeChar();
 897                 }
 898         }
 899
 900         sort(pfx.begin(), pfx.end(), ModeParser::PrefixComparison);
 901
 902         for (pfxcontainer::iterator n = pfx.begin(); n != pfx.end(); n++)
 903         {
 904                 mletters = mletters + n->first;
 905                 mprefixes = mprefixes + prefix_to_mode.find(n->first)->second;
 906         }
 907
 908         return "(" + mprefixes + ")" + mletters;
 909 }
 910
 911 bool ModeParser::AddModeWatcher(ModeWatcher* mw)
 912 {
 913         unsigned char mask = 0;
 914         unsigned char pos = 0;
 915
 916         if (!mw)
 917                 return false;
 918
 919         if ((mw->GetModeChar() < 'A') || (mw->GetModeChar() > 'z'))
 920                 return false;
 921
 922         mw->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
 923         pos = (mw->GetModeChar()-65) | mask;
 924
 925         modewatchers[pos].push_back(mw);
 926         return true;
 927 }
 928
 929 bool ModeParser::DelModeWatcher(ModeWatcher* mw)
 930 {
 931         unsigned char mask = 0;
 932         unsigned char pos = 0;
 933
 934         if (!mw)
 935                 return false;
 936
 937         if ((mw->GetModeChar() < 'A') || (mw->GetModeChar() > 'z'))
 938                 return false;
 939
 940         mw->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
 941         pos = (mw->GetModeChar()-65) | mask;
 942
 943         ModeWatchIter a = find(modewatchers[pos].begin(),modewatchers[pos].end(),mw);
 944
 945         if (a == modewatchers[pos].end())
 946         {
 947                 return false;
 948         }
 949
 950         modewatchers[pos].erase(a);
 951
 952         return true;
 953 }
 954
 955 /** This default implementation can remove simple user modes
 956  */
 957 void ModeHandler::RemoveMode(userrec* user)
 958 {
 959         char moderemove[MAXBUF];
 960         const char* parameters[] = { user->nick, moderemove };
 961
 962         if (user->IsModeSet(this->GetModeChar()))
 963         {
 964                 sprintf(moderemove,"-%c",this->GetModeChar());
 965                 ServerInstance->Parser->CallHandler("MODE", parameters, 2, user);
 966         }
 967 }
 968
 969 /** This default implementation can remove simple channel modes
 970  * (no parameters)
 971  */
 972 void ModeHandler::RemoveMode(chanrec* channel)
 973 {
 974         char moderemove[MAXBUF];
 975         const char* parameters[] = { channel->name, moderemove };
 976
 977         if (channel->IsModeSet(this->GetModeChar()))
 978         {
 979                 userrec* n = new userrec(ServerInstance);
 980
 981                 sprintf(moderemove,"-%c",this->GetModeChar());
 982                 n->SetFd(FD_MAGIC_NUMBER);
 983
 984                 ServerInstance->SendMode(parameters, 2, n);
 985
 986                 delete n;
 987         }
 988 }
 989
 990 ModeParser::ModeParser(InspIRCd* Instance) : ServerInstance(Instance)
 991 {
 992         struct Initializer
 993         {
 994                 char modechar;
 995                 ModeHandler* handler;
 996         };
 997
 998         Initializer modes[] = {
 999                 { 's', new ModeChannelSecret(Instance) },
1000                 { 'p', new ModeChannelPrivate(Instance) },
1001                 { 'm', new ModeChannelModerated(Instance) },
1002                 { 't', new ModeChannelTopicOps(Instance) },
1003                 { 'n', new ModeChannelNoExternal(Instance) },
1004                 { 'i', new ModeChannelInviteOnly(Instance) },
1005                 { 'k', new ModeChannelKey(Instance) },
1006                 { 'l', new ModeChannelLimit(Instance) },
1007                 { 'b', new ModeChannelBan(Instance) },
1008                 { 'o', new ModeChannelOp(Instance) },
1009                 { 'h', new ModeChannelHalfOp(Instance) },
1010                 { 'v', new ModeChannelVoice(Instance) },
1011                 { 's', new ModeUserServerNotice(Instance) },
1012                 { 'w', new ModeUserWallops(Instance) },
1013                 { 'i', new ModeUserInvisible(Instance) },
1014                 { 'o', new ModeUserOperator(Instance) },
1015                 { 'n', new ModeUserServerNoticeMask(Instance) },
1016                 { 0, NULL }
1017         };
1018
1019         /* Clear mode list */
1020         memset(modehandlers, 0, sizeof(modehandlers));
1021         memset(modewatchers, 0, sizeof(modewatchers));
1022
1023         /* Last parse string */
1024         LastParse = "";
1025
1026         /* Initialise the RFC mode letters */
1027         for (int index = 0; modes[index].modechar; index++)
1028                 this->AddMode(modes[index].handler, modes[index].modechar);
1029 }