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         ServerInstance->Log(DEBUG,"Change count for mode %c is now %d", mode, count);
  83 }
  84
  85 ModeType ModeHandler::GetModeType()
  86 {
  87         return m_type;
  88 }
  89
  90 bool ModeHandler::NeedsOper()
  91 {
  92         return oper;
  93 }
  94
  95 char ModeHandler::GetPrefix()
  96 {
  97         return prefix;
  98 }
  99
 100 int ModeHandler::GetNumParams(bool adding)
 101 {
 102         return adding ? n_params_on : n_params_off;
 103 }
 104
 105 char ModeHandler::GetModeChar()
 106 {
 107         return mode;
 108 }
 109
 110 ModeAction ModeHandler::OnModeChange(userrec* source, userrec* dest, chanrec* channel, std::string &parameter, bool adding)
 111 {
 112         return MODEACTION_DENY;
 113 }
 114
 115 ModePair ModeHandler::ModeSet(userrec* source, userrec* dest, chanrec* channel, const std::string &parameter)
 116 {
 117         if (dest)
 118         {
 119                 return std::make_pair(dest->IsModeSet(this->mode), "");
 120         }
 121         else
 122         {
 123                 return std::make_pair(channel->IsModeSet(this->mode), "");
 124         }
 125 }
 126
 127 void ModeHandler::DisplayList(userrec* user, chanrec* channel)
 128 {
 129 }
 130
 131 bool ModeHandler::CheckTimeStamp(time_t theirs, time_t ours, const std::string &their_param, const std::string &our_param, chanrec* channel)
 132 {
 133         return (ours < theirs);
 134 }
 135
 136 ModeWatcher::ModeWatcher(InspIRCd* Instance, char modeletter, ModeType type) : ServerInstance(Instance), mode(modeletter), m_type(type)
 137 {
 138 }
 139
 140 ModeWatcher::~ModeWatcher()
 141 {
 142 }
 143
 144 char ModeWatcher::GetModeChar()
 145 {
 146         return mode;
 147 }
 148
 149 ModeType ModeWatcher::GetModeType()
 150 {
 151         return m_type;
 152 }
 153
 154 bool ModeWatcher::BeforeMode(userrec* source, userrec* dest, chanrec* channel, std::string &parameter, bool adding, ModeType type)
 155 {
 156         return true;
 157 }
 158
 159 void ModeWatcher::AfterMode(userrec* source, userrec* dest, chanrec* channel, const std::string &parameter, bool adding, ModeType type)
 160 {
 161 }
 162
 163 userrec* ModeParser::SanityChecks(userrec *user,const char *dest,chanrec *chan,int status)
 164 {
 165         userrec *d;
 166         if ((!user) || (!dest) || (!chan) || (!*dest))
 167         {
 168                 return NULL;
 169         }
 170         d = ServerInstance->FindNick(dest);
 171         if (!d)
 172         {
 173                 user->WriteServ("401 %s %s :No such nick/channel",user->nick, dest);
 174                 return NULL;
 175         }
 176         return d;
 177 }
 178
 179 const char* ModeParser::Grant(userrec *d,chanrec *chan,int MASK)
 180 {
 181         if (!chan)
 182                 return "";
 183
 184         UCListIter n = d->chans.find(chan);
 185         if (n != d->chans.end())
 186         {
 187                 if (n->second & MASK)
 188                 {
 189                         return "";
 190                 }
 191                 n->second = n->second | MASK;
 192                 switch (MASK)
 193                 {
 194                         case UCMODE_OP:
 195                                 n->first->AddOppedUser(d);
 196                         break;
 197                         case UCMODE_HOP:
 198                                 n->first->AddHalfoppedUser(d);
 199                         break;
 200                         case UCMODE_VOICE:
 201                                 n->first->AddVoicedUser(d);
 202                         break;
 203                 }
 204                 return d->nick;
 205         }
 206         return "";
 207 }
 208
 209 const char* ModeParser::Revoke(userrec *d,chanrec *chan,int MASK)
 210 {
 211         if (!chan)
 212                 return "";
 213
 214         UCListIter n = d->chans.find(chan);
 215         if (n != d->chans.end())
 216         {
 217                 if ((n->second & MASK) == 0)
 218                 {
 219                         return "";
 220                 }
 221                 n->second ^= MASK;
 222                 switch (MASK)
 223                 {
 224                         case UCMODE_OP:
 225                                 n->first->DelOppedUser(d);
 226                         break;
 227                         case UCMODE_HOP:
 228                                 n->first->DelHalfoppedUser(d);
 229                         break;
 230                         case UCMODE_VOICE:
 231                                 n->first->DelVoicedUser(d);
 232                         break;
 233                 }
 234                 return d->nick;
 235         }
 236         return "";
 237 }
 238
 239 void ModeParser::DisplayCurrentModes(userrec *user, userrec* targetuser, chanrec* targetchannel, const char* text)
 240 {
 241         if (targetchannel)
 242         {
 243                 /* Display channel's current mode string */
 244                 user->WriteServ("324 %s %s +%s",user->nick, targetchannel->name, targetchannel->ChanModes(targetchannel->HasUser(user)));
 245                 user->WriteServ("329 %s %s %lu", user->nick, targetchannel->name, (unsigned long)targetchannel->age);
 246                 return;
 247         }
 248         else if (targetuser)
 249         {
 250                 if (targetuser->Visibility && !targetuser->Visibility->VisibleTo(user))
 251                 {
 252                         user->WriteServ("401 %s %s :No such nick/channel",user->nick, text);
 253                         return;
 254                 }
 255
 256                 if ((targetuser == user) || (IS_OPER(user)))
 257                 {
 258                         /* Display user's current mode string */
 259                         user->WriteServ("221 %s :+%s",targetuser->nick,targetuser->FormatModes());
 260                         if (IS_OPER(targetuser))
 261                                 user->WriteServ("008 %s +%s :Server notice mask", targetuser->nick, targetuser->FormatNoticeMasks());
 262                         return;
 263                 }
 264                 else
 265                 {
 266                         user->WriteServ("502 %s :Can't change mode for other users", user->nick);
 267                         return;
 268                 }
 269         }
 270
 271         /* No such nick/channel */
 272         user->WriteServ("401 %s %s :No such nick/channel",user->nick, text);
 273         return;
 274 }
 275
 276 void ModeParser::Process(const char** parameters, int pcnt, userrec *user, bool servermode)
 277 {
 278         std::string target = parameters[0];
 279         ModeType type = MODETYPE_USER;
 280         unsigned char mask = 0;
 281         chanrec* targetchannel = ServerInstance->FindChan(parameters[0]);
 282         userrec* targetuser  = ServerInstance->FindNick(parameters[0]);
 283
 284         LastParse.clear();
 285
 286         /* Special case for displaying the list for listmodes,
 287          * e.g. MODE #chan b, or MODE #chan +b without a parameter
 288          */
 289         if ((targetchannel) && (pcnt == 2))
 290         {
 291                 const char* mode = parameters[1];
 292                 int nonlistmodes_found = 0;
 293                 bool sent[256];
 294
 295                 mask = MASK_CHANNEL;
 296
 297                 memset(&sent, 0, 256);
 298
 299                 while (mode && *mode)
 300                 {
 301                         unsigned char mletter = *mode;
 302
 303                         if (*mode == '+')
 304                         {
 305                                 mode++;
 306                                 continue;
 307                         }
 308
 309                         /* Ensure the user doesnt request the same mode twice,
 310                          * so they cant flood themselves off out of idiocy.
 311                          */
 312                         if (!sent[mletter])
 313                         {
 314                                 sent[mletter] = true;
 315                         }
 316                         else
 317                         {
 318                                 mode++;
 319                                 continue;
 320                         }
 321
 322                         ModeHandler *mh = this->FindMode(*mode, MODETYPE_CHANNEL);
 323                         bool display = true;
 324
 325                         if ((mh) && (mh->IsListMode()))
 326                         {
 327                                 if (ServerInstance->Config->HideModeLists[mletter] && (targetchannel->GetStatus(user) < STATUS_HOP))
 328                                 {
 329                                         user->WriteServ("482 %s %s :Only half-operators and above may view the +%c list",user->nick, targetchannel->name, *mode++);
 330                                         continue;
 331                                 }
 332
 333                                 /** See below for a description of what craq this is :D
 334                                  */
 335                                 unsigned char handler_id = (*mode - 65) | mask;
 336
 337                                 for(ModeWatchIter watchers = modewatchers[handler_id].begin(); watchers != modewatchers[handler_id].end(); watchers++)
 338                                 {
 339                                         std::string dummyparam;
 340
 341                                         if (!((*watchers)->BeforeMode(user, NULL, targetchannel, dummyparam, true, MODETYPE_CHANNEL)))
 342                                                 display = false;
 343                                 }
 344
 345                                 if (display)
 346                                         mh->DisplayList(user, targetchannel);
 347                         }
 348                         else
 349                                 nonlistmodes_found++;
 350
 351                         mode++;
 352                 }
 353
 354                 /* We didnt have any modes that were non-list, we can return here */
 355                 if (!nonlistmodes_found)
 356                         return;
 357         }
 358
 359         if (pcnt == 1)
 360         {
 361                 this->DisplayCurrentModes(user, targetuser, targetchannel, parameters[0]);
 362         }
 363         else if (pcnt > 1)
 364         {
 365                 if (targetchannel)
 366                 {
 367                         type = MODETYPE_CHANNEL;
 368                         mask = MASK_CHANNEL;
 369
 370                         /* Extra security checks on channel modes
 371                          * (e.g. are they a (half)op?
 372                          */
 373
 374                         if ((IS_LOCAL(user)) && (targetchannel->GetStatus(user) < STATUS_HOP))
 375                         {
 376                                 /* We don't have halfop */
 377                                 int MOD_RESULT = 0;
 378                                 FOREACH_RESULT(I_OnAccessCheck,OnAccessCheck(user, NULL, targetchannel, AC_GENERAL_MODE));
 379                                 if (MOD_RESULT == ACR_DENY)
 380                                         return;
 381
 382                                 if (MOD_RESULT == ACR_DEFAULT)
 383                                 {
 384                                         /* Are we a uline or is it a servermode? */
 385                                         if ((!ServerInstance->ULine(user->server)) && (!servermode))
 386                                         {
 387                                                 /* Not enough permission:
 388                                                  * NOT a uline and NOT a servermode,
 389                                                  * OR, NOT halfop or above.
 390                                                  */
 391                                                 user->WriteServ("482 %s %s :You're not a channel (half)operator",user->nick, targetchannel->name);
 392                                                 return;
 393                                         }
 394                                 }
 395                         }
 396                 }
 397                 else if (targetuser)
 398                 {
 399                         type = MODETYPE_USER;
 400                         mask = MASK_USER;
 401                         if ((user != targetuser) && (!ServerInstance->ULine(user->server)))
 402                         {
 403                                 user->WriteServ("502 %s :Can't change mode for other users", user->nick);
 404                                 return;
 405                         }
 406                 }
 407                 else
 408                 {
 409                         /* No such nick/channel */
 410                         user->WriteServ("401 %s %s :No such nick/channel",user->nick, parameters[0]);
 411                         return;
 412                 }
 413
 414                 std::string mode_sequence = parameters[1];
 415                 std::string parameter;
 416                 std::ostringstream parameter_list;
 417                 std::string output_sequence;
 418                 bool adding = true, state_change = false;
 419                 unsigned char handler_id = 0;
 420                 int parameter_counter = 2; /* Index of first parameter */
 421                 int parameter_count = 0;
 422                 bool last_successful_state_change = false;
 423
 424                 /* A mode sequence that doesnt start with + or -. Assume +. - Thanks for the suggestion spike (bug#132) */
 425                 if ((*mode_sequence.begin() != '+') && (*mode_sequence.begin() != '-'))
 426                         mode_sequence.insert(0, "+");
 427
 428                 for (std::string::const_iterator letter = mode_sequence.begin(); letter != mode_sequence.end(); letter++)
 429                 {
 430                         unsigned char modechar = *letter;
 431
 432                         switch (modechar)
 433                         {
 434                                 /* NB:
 435                                  * For + and - mode characters, we don't just stick the character into the output sequence.
 436                                  * This is because the user may do something dumb, like: +-+ooo or +oo-+. To prevent this
 437                                  * appearing in the output sequence, we store a flag which says there was a state change,
 438                                  * which is set on any + or -, however, the + or - that we finish on is only appended to
 439                                  * the output stream in the event it is followed by a non "+ or -" character, such as o or v.
 440                                  */
 441                                 case '+':
 442                                         /* The following expression prevents: +o+o nick nick, compressing it to +oo nick nick,
 443                                          * however, will allow the + if it is the first item in the sequence, regardless.
 444                                          */
 445                                         if ((!adding) || (!output_sequence.length()))
 446                                                 state_change = true;
 447                                         adding = true;
 448                                         if (!output_sequence.length())
 449                                                 last_successful_state_change = false;
 450                                         continue;
 451                                 break;
 452                                 case '-':
 453                                         if ((adding) || (!output_sequence.length()))
 454                                                 state_change = true;
 455                                         adding = false;
 456                                         if (!output_sequence.length())
 457                                                 last_successful_state_change = true;
 458                                         continue;
 459                                 break;
 460                                 default:
 461
 462                                         /**
 463                                          * Watch carefully for the sleight of hand trick.
 464                                          * 65 is the ascii value of 'A'. We take this from
 465                                          * the char we're looking at to get a number between
 466                                          * 1 and 127. We then logic-or it to get the hashed
 467                                          * position, dependent on wether its a channel or
 468                                          * a user mode. This is a little stranger, but a lot
 469                                          * faster, than using a map of pairs.
 470                                          */
 471                                         handler_id = (modechar - 65) | mask;
 472
 473                                         if (modehandlers[handler_id])
 474                                         {
 475                                                 bool abort = false;
 476
 477                                                 if (modehandlers[handler_id]->GetModeType() == type)
 478                                                 {
 479                                                         if (modehandlers[handler_id]->GetNumParams(adding))
 480                                                         {
 481                                                                 /* This mode expects a parameter, do we have any parameters left in our list to use? */
 482                                                                 if (parameter_counter < pcnt)
 483                                                                 {
 484                                                                         parameter = parameters[parameter_counter++];
 485
 486                                                                         /* Yerk, invalid! */
 487                                                                         if ((parameter.find(':') == 0) || (parameter.rfind(' ') != std::string::npos))
 488                                                                                 parameter.clear();
 489                                                                 }
 490                                                                 else
 491                                                                 {
 492                                                                         /* No parameter, continue to the next mode */
 493                                                                         continue;
 494                                                                 }
 495
 496                                                                 bool had_parameter = !parameter.empty();
 497
 498                                                                 for (ModeWatchIter watchers = modewatchers[handler_id].begin(); watchers != modewatchers[handler_id].end(); watchers++)
 499                                                                 {
 500                                                                         if ((*watchers)->BeforeMode(user, targetuser, targetchannel, parameter, adding, type) == false)
 501                                                                         {
 502                                                                                 abort = true;
 503                                                                                 break;
 504                                                                         }
 505                                                                         /* A module whacked the parameter completely, and there was one. abort. */
 506                                                                         if ((had_parameter) && (parameter.empty()))
 507                                                                         {
 508                                                                                 abort = true;
 509                                                                                 break;
 510                                                                         }
 511                                                                 }
 512
 513                                                                 if (abort)
 514                                                                         continue;
 515                                                         }
 516                                                         else
 517                                                         {
 518                                                                 /* Fix by brain: mode watchers not being called for parameterless modes */
 519                                                                 for (ModeWatchIter watchers = modewatchers[handler_id].begin(); watchers != modewatchers[handler_id].end(); watchers++)
 520                                                                 {
 521                                                                         if ((*watchers)->BeforeMode(user, targetuser, targetchannel, parameter, adding, type) == false)
 522                                                                         {
 523                                                                                 abort = true;
 524                                                                                 break;
 525                                                                         }
 526                                                                 }
 527
 528                                                                 if (abort)
 529                                                                         continue;
 530                                                         }
 531
 532                                                         /* It's an oper only mode, check if theyre an oper. If they arent,
 533                                                          * eat any parameter that  came with the mode, and continue to next
 534                                                          */
 535                                                         if ((IS_LOCAL(user)) && (modehandlers[handler_id]->NeedsOper()) && (!IS_OPER(user)))
 536                                                         {
 537                                                                 user->WriteServ("481 %s :Permission Denied - Only IRC operators may %sset %s mode %c", user->nick,
 538                                                                                 adding ? "" : "un", type == MODETYPE_CHANNEL ? "channel" : "user",
 539                                                                                 modehandlers[handler_id]->GetModeChar());
 540                                                                 continue;
 541                                                         }
 542
 543                                                         /* Call the handler for the mode */
 544                                                         ModeAction ma = modehandlers[handler_id]->OnModeChange(user, targetuser, targetchannel, parameter, adding);
 545
 546                                                         if ((modehandlers[handler_id]->GetNumParams(adding)) && (parameter.empty()))
 547                                                         {
 548                                                                 /* The handler nuked the parameter and they are supposed to have one.
 549                                                                  * We CANT continue now, even if they actually returned MODEACTION_ALLOW,
 550                                                                  * so we bail to the next mode character.
 551                                                                  */
 552                                                                 continue;
 553                                                         }
 554
 555                                                         if (ma == MODEACTION_ALLOW)
 556                                                         {
 557                                                                 /* We're about to output a valid mode letter - was there previously a pending state-change? */
 558                                                                 if (state_change)
 559                                                                 {
 560                                                                         if (adding != last_successful_state_change)
 561                                                                                 output_sequence.append(adding ? "+" : "-");
 562                                                                         last_successful_state_change = adding;
 563                                                                 }
 564
 565                                                                 /* Add the mode letter */
 566                                                                 output_sequence.push_back(modechar);
 567
 568                                                                 modehandlers[handler_id]->ChangeCount(adding ? 1 : -1);
 569
 570                                                                 /* Is there a valid parameter for this mode? If so add it to the parameter list */
 571                                                                 if ((modehandlers[handler_id]->GetNumParams(adding)) && (!parameter.empty()))
 572                                                                 {
 573                                                                         parameter_list << " " << parameter;
 574                                                                         parameter_count++;
 575                                                                         /* Does this mode have a prefix? */
 576                                                                         if (modehandlers[handler_id]->GetPrefix() && targetchannel)
 577                                                                         {
 578                                                                                 userrec* user_to_prefix = ServerInstance->FindNick(parameter);
 579                                                                                 if (user_to_prefix)
 580                                                                                         targetchannel->SetPrefix(user_to_prefix, modehandlers[handler_id]->GetPrefix(),
 581                                                                                                         modehandlers[handler_id]->GetPrefixRank(), adding);
 582                                                                         }
 583                                                                 }
 584
 585                                                                 /* Call all the AfterMode events in the mode watchers for this mode */
 586                                                                 for (ModeWatchIter watchers = modewatchers[handler_id].begin(); watchers != modewatchers[handler_id].end(); watchers++)
 587                                                                         (*watchers)->AfterMode(user, targetuser, targetchannel, parameter, adding, type);
 588
 589                                                                 /* Reset the state change flag */
 590                                                                 state_change = false;
 591
 592                                                                 if ((output_sequence.length() + parameter_list.str().length() > 450) || (output_sequence.length() > 100)
 593                                                                                 || (parameter_count > MAXMODES))
 594                                                                 {
 595                                                                         /* We cant have a mode sequence this long */
 596                                                                         letter = mode_sequence.end() - 1;
 597                                                                         continue;
 598                                                                 }
 599                                                         }
 600                                                 }
 601                                         }
 602                                         else
 603                                         {
 604                                                 /* No mode handler? Unknown mode character then. */
 605                                                 user->WriteServ("472 %s %c :is unknown mode char to me",user->nick, modechar);
 606                                         }
 607                                 break;
 608                         }
 609                 }
 610
 611                 /* Was there at least one valid mode in the sequence? */
 612                 if (!output_sequence.empty())
 613                 {
 614                         if (servermode)
 615                         {
 616                                 if (type == MODETYPE_CHANNEL)
 617                                 {
 618                                         targetchannel->WriteChannelWithServ(ServerInstance->Config->ServerName, "MODE %s %s%s", targetchannel->name, output_sequence.c_str(), parameter_list.str().c_str());
 619                                         this->LastParse = targetchannel->name;
 620                                 }
 621                                 else
 622                                 {
 623                                         targetuser->WriteServ("MODE %s %s%s",targetuser->nick,output_sequence.c_str(), parameter_list.str().c_str());
 624                                         this->LastParse = targetuser->nick;
 625                                 }
 626                         }
 627                         else
 628                         {
 629                                 if (type == MODETYPE_CHANNEL)
 630                                 {
 631                                         targetchannel->WriteChannel(user,"MODE %s %s%s",targetchannel->name,output_sequence.c_str(),parameter_list.str().c_str());
 632                                         FOREACH_MOD(I_OnMode,OnMode(user, targetchannel, TYPE_CHANNEL, output_sequence + parameter_list.str()));
 633                                         this->LastParse = targetchannel->name;
 634                                 }
 635                                 else
 636                                 {
 637                                         user->WriteTo(targetuser,"MODE %s %s%s",targetuser->nick,output_sequence.c_str(), parameter_list.str().c_str());
 638                                         FOREACH_MOD(I_OnMode,OnMode(user, targetuser, TYPE_USER, output_sequence + parameter_list.str()));
 639                                         this->LastParse = targetuser->nick;
 640                                 }
 641                         }
 642
 643                         LastParse.append(" ");
 644                         LastParse.append(output_sequence);
 645                         LastParse.append(parameter_list.str());
 646                 }
 647         }
 648 }
 649
 650 const std::string& ModeParser::GetLastParse()
 651 {
 652         return LastParse;
 653 }
 654
 655 void ModeParser::CleanMask(std::string &mask)
 656 {
 657         std::string::size_type pos_of_pling = mask.find_first_of('!');
 658         std::string::size_type pos_of_at = mask.find_first_of('@');
 659         std::string::size_type pos_of_dot = mask.find_first_of('.');
 660         std::string::size_type pos_of_colon = mask.find_first_of(':'); /* Because ipv6 addresses are colon delimited */
 661
 662         if ((pos_of_pling == std::string::npos) && (pos_of_at == std::string::npos))
 663         {
 664                 /* Just a nick, or just a host */
 665                 if ((pos_of_dot == std::string::npos) && (pos_of_colon == std::string::npos))
 666                 {
 667                         /* It has no '.' in it, it must be a nick. */
 668                         mask.append("!*@*");
 669                 }
 670                 else
 671                 {
 672                         /* Got a dot in it? Has to be a host */
 673                         mask = "*!*@" + mask;
 674                 }
 675         }
 676         else if ((pos_of_pling == std::string::npos) && (pos_of_at != std::string::npos))
 677         {
 678                 /* Has an @ but no !, its a user@host */
 679                  mask = "*!" + mask;
 680         }
 681         else if ((pos_of_pling != std::string::npos) && (pos_of_at == std::string::npos))
 682         {
 683                 /* Has a ! but no @, it must be a nick!ident */
 684                 mask.append("@*");
 685         }
 686 }
 687
 688 bool ModeParser::AddMode(ModeHandler* mh, unsigned const char modeletter)
 689 {
 690         unsigned char mask = 0;
 691         unsigned char pos = 0;
 692
 693         /* Yes, i know, this might let people declare modes like '_' or '^'.
 694          * If they do that, thats their problem, and if i ever EVER see an
 695          * official InspIRCd developer do that, i'll beat them with a paddle!
 696          */
 697         if ((mh->GetModeChar() < 'A') || (mh->GetModeChar() > 'z') || (mh->GetPrefix() > 126))
 698                 return false;
 699
 700         /* A mode prefix of ',' is not acceptable, it would fuck up server to server.
 701          * A mode prefix of ':' will fuck up both server to server, and client to server.
 702          * A mode prefix of '#' will mess up /whois and /privmsg
 703          */
 704         if ((mh->GetPrefix() == ',') || (mh->GetPrefix() == ':') || (mh->GetPrefix() == '#'))
 705                 return false;
 706
 707         mh->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
 708         pos = (mh->GetModeChar()-65) | mask;
 709
 710         if (modehandlers[pos])
 711                 return false;
 712
 713         modehandlers[pos] = mh;
 714         return true;
 715 }
 716
 717 bool ModeParser::DelMode(ModeHandler* mh)
 718 {
 719         unsigned char mask = 0;
 720         unsigned char pos = 0;
 721
 722         if ((mh->GetModeChar() < 'A') || (mh->GetModeChar() > 'z'))
 723                 return false;
 724
 725         mh->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
 726         pos = (mh->GetModeChar()-65) | mask;
 727
 728         if (!modehandlers[pos])
 729                 return false;
 730
 731         switch (mh->GetModeType())
 732         {
 733                 case MODETYPE_USER:
 734                         for (user_hash::iterator i = ServerInstance->clientlist->begin(); i != ServerInstance->clientlist->end(); i++)
 735                         {
 736                                 mh->RemoveMode(i->second);
 737                         }
 738                 break;
 739                 case MODETYPE_CHANNEL:
 740                         for (chan_hash::iterator i = ServerInstance->chanlist->begin(); i != ServerInstance->chanlist->end(); i++)
 741                         {
 742                                 mh->RemoveMode(i->second);
 743                         }
 744                 break;
 745         }
 746
 747         modehandlers[pos] = NULL;
 748
 749         return true;
 750 }
 751
 752 ModeHandler* ModeParser::FindMode(unsigned const char modeletter, ModeType mt)
 753 {
 754         unsigned char mask = 0;
 755         unsigned char pos = 0;
 756
 757         if ((modeletter < 'A') || (modeletter > 'z'))
 758                 return NULL;
 759
 760         mt == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
 761         pos = (modeletter-65) | mask;
 762
 763         return modehandlers[pos];
 764 }
 765
 766 std::string ModeParser::UserModeList()
 767 {
 768         char modestr[256];
 769         int pointer = 0;
 770
 771         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 772         {
 773                 unsigned char pos = (mode-65) | MASK_USER;
 774
 775                 if (modehandlers[pos])
 776                         modestr[pointer++] = mode;
 777         }
 778         modestr[pointer++] = 0;
 779         return modestr;
 780 }
 781
 782 std::string ModeParser::ChannelModeList()
 783 {
 784         char modestr[256];
 785         int pointer = 0;
 786
 787         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 788         {
 789                 if ((!ServerInstance->Config->AllowHalfop) && (mode == 'h'))
 790                         continue;
 791
 792                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 793
 794                 if (modehandlers[pos])
 795                         modestr[pointer++] = mode;
 796         }
 797         modestr[pointer++] = 0;
 798         return modestr;
 799 }
 800
 801 std::string ModeParser::ParaModeList()
 802 {
 803         char modestr[256];
 804         int pointer = 0;
 805
 806         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 807         {
 808                 if ((!ServerInstance->Config->AllowHalfop) && (mode == 'h'))
 809                         continue;
 810
 811                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 812
 813                 if ((modehandlers[pos]) && (modehandlers[pos]->GetNumParams(true)))
 814                         modestr[pointer++] = mode;
 815         }
 816         modestr[pointer++] = 0;
 817         return modestr;
 818 }
 819
 820 ModeHandler* ModeParser::FindPrefix(unsigned const char pfxletter)
 821 {
 822         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 823         {
 824                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 825
 826                 if ((modehandlers[pos]) && (modehandlers[pos]->GetPrefix() == pfxletter))
 827                 {
 828                         return modehandlers[pos];
 829                 }
 830         }
 831         return NULL;
 832 }
 833
 834 std::string ModeParser::ModeString(userrec* user, chanrec* channel)
 835 {
 836         std::string types;
 837         std::string pars;
 838
 839         if (!channel || !user)
 840                 return "";
 841
 842         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 843         {
 844                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 845                 ModeHandler* mh = modehandlers[pos];
 846                 if ((mh) && (mh->GetNumParams(true)) && (mh->GetNumParams(false)))
 847                 {
 848                         ModePair ret;
 849                         ret = mh->ModeSet(NULL, user, channel, user->nick);
 850                         if ((ret.first) && (ret.second == user->nick))
 851                         {
 852                                 pars.append(" ");
 853                                 pars.append(user->nick);
 854                                 types.push_back(mh->GetModeChar());
 855                         }
 856                 }
 857         }
 858
 859         return types+pars;
 860 }
 861
 862 std::string ModeParser::ChanModes()
 863 {
 864         std::string type1;      /* Listmodes EXCEPT those with a prefix */
 865         std::string type2;      /* Modes that take a param when adding or removing */
 866         std::string type3;      /* Modes that only take a param when adding */
 867         std::string type4;      /* Modes that dont take a param */
 868
 869         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 870         {
 871                 if ((!ServerInstance->Config->AllowHalfop) && (mode == 'h'))
 872                         continue;
 873
 874                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 875                  /* One parameter when adding */
 876                 if (modehandlers[pos])
 877                 {
 878                         if (modehandlers[pos]->GetNumParams(true))
 879                         {
 880                                 if ((modehandlers[pos]->IsListMode()) && (!modehandlers[pos]->GetPrefix()))
 881                                 {
 882                                         type1 += modehandlers[pos]->GetModeChar();
 883                                 }
 884                                 else
 885                                 {
 886                                         /* ... and one parameter when removing */
 887                                         if (modehandlers[pos]->GetNumParams(false))
 888                                         {
 889                                                 /* But not a list mode */
 890                                                 if (!modehandlers[pos]->GetPrefix())
 891                                                 {
 892                                                         type2 += modehandlers[pos]->GetModeChar();
 893                                                 }
 894                                         }
 895                                         else
 896                                         {
 897                                                 /* No parameters when removing */
 898                                                 type3 += modehandlers[pos]->GetModeChar();
 899                                         }
 900                                 }
 901                         }
 902                         else
 903                         {
 904                                 type4 += modehandlers[pos]->GetModeChar();
 905                         }
 906                 }
 907
 908         }
 909
 910         return type1 + "," + type2 + "," + type3 + "," + type4;
 911 }
 912
 913 bool ModeParser::PrefixComparison(prefixtype one, prefixtype two)
 914 {
 915         return one.second > two.second;
 916 }
 917
 918 std::string ModeParser::BuildPrefixes()
 919 {
 920         std::string mletters;
 921         std::string mprefixes;
 922         pfxcontainer pfx;
 923         std::map<char,char> prefix_to_mode;
 924
 925         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 926         {
 927                 if ((!ServerInstance->Config->AllowHalfop) && (mode == 'h'))
 928                         continue;
 929
 930                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 931
 932                 if ((modehandlers[pos]) && (modehandlers[pos]->GetPrefix()))
 933                 {
 934                         pfx.push_back(std::make_pair<char,unsigned int>(modehandlers[pos]->GetPrefix(), modehandlers[pos]->GetPrefixRank()));
 935                         prefix_to_mode[modehandlers[pos]->GetPrefix()] = modehandlers[pos]->GetModeChar();
 936                 }
 937         }
 938
 939         sort(pfx.begin(), pfx.end(), ModeParser::PrefixComparison);
 940
 941         for (pfxcontainer::iterator n = pfx.begin(); n != pfx.end(); n++)
 942         {
 943                 mletters = mletters + n->first;
 944                 mprefixes = mprefixes + prefix_to_mode.find(n->first)->second;
 945         }
 946
 947         return "(" + mprefixes + ")" + mletters;
 948 }
 949
 950 bool ModeParser::AddModeWatcher(ModeWatcher* mw)
 951 {
 952         unsigned char mask = 0;
 953         unsigned char pos = 0;
 954
 955         if (!mw)
 956                 return false;
 957
 958         if ((mw->GetModeChar() < 'A') || (mw->GetModeChar() > 'z'))
 959                 return false;
 960
 961         mw->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
 962         pos = (mw->GetModeChar()-65) | mask;
 963
 964         modewatchers[pos].push_back(mw);
 965
 966         return true;
 967 }
 968
 969 bool ModeParser::DelModeWatcher(ModeWatcher* mw)
 970 {
 971         unsigned char mask = 0;
 972         unsigned char pos = 0;
 973
 974         if (!mw)
 975                 return false;
 976
 977         if ((mw->GetModeChar() < 'A') || (mw->GetModeChar() > 'z'))
 978                 return false;
 979
 980         mw->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
 981         pos = (mw->GetModeChar()-65) | mask;
 982
 983         ModeWatchIter a = find(modewatchers[pos].begin(),modewatchers[pos].end(),mw);
 984
 985         if (a == modewatchers[pos].end())
 986         {
 987                 return false;
 988         }
 989
 990         modewatchers[pos].erase(a);
 991
 992         return true;
 993 }
 994
 995 /** This default implementation can remove simple user modes
 996  */
 997 void ModeHandler::RemoveMode(userrec* user)
 998 {
 999         char moderemove[MAXBUF];
1000         const char* parameters[] = { user->nick, moderemove };
1001
1002         if (user->IsModeSet(this->GetModeChar()))
1003         {
1004                 sprintf(moderemove,"-%c",this->GetModeChar());
1005                 ServerInstance->Parser->CallHandler("MODE", parameters, 2, user);
1006         }
1007 }
1008
1009 /** This default implementation can remove simple channel modes
1010  * (no parameters)
1011  */
1012 void ModeHandler::RemoveMode(chanrec* channel)
1013 {
1014         char moderemove[MAXBUF];
1015         const char* parameters[] = { channel->name, moderemove };
1016
1017         if (channel->IsModeSet(this->GetModeChar()))
1018         {
1019                 userrec* n = new userrec(ServerInstance);
1020
1021                 sprintf(moderemove,"-%c",this->GetModeChar());
1022                 n->SetFd(FD_MAGIC_NUMBER);
1023
1024                 ServerInstance->SendMode(parameters, 2, n);
1025
1026                 delete n;
1027         }
1028 }
1029
1030 ModeParser::ModeParser(InspIRCd* Instance) : ServerInstance(Instance)
1031 {
1032         struct Initializer
1033         {
1034                 char modechar;
1035                 ModeHandler* handler;
1036         };
1037
1038         Initializer modes[] = {
1039                 { 's', new ModeChannelSecret(Instance) },
1040                 { 'p', new ModeChannelPrivate(Instance) },
1041                 { 'm', new ModeChannelModerated(Instance) },
1042                 { 't', new ModeChannelTopicOps(Instance) },
1043                 { 'n', new ModeChannelNoExternal(Instance) },
1044                 { 'i', new ModeChannelInviteOnly(Instance) },
1045                 { 'k', new ModeChannelKey(Instance) },
1046                 { 'l', new ModeChannelLimit(Instance) },
1047                 { 'b', new ModeChannelBan(Instance) },
1048                 { 'o', new ModeChannelOp(Instance) },
1049                 { 'h', new ModeChannelHalfOp(Instance) },
1050                 { 'v', new ModeChannelVoice(Instance) },
1051                 { 's', new ModeUserServerNotice(Instance) },
1052                 { 'w', new ModeUserWallops(Instance) },
1053                 { 'i', new ModeUserInvisible(Instance) },
1054                 { 'o', new ModeUserOperator(Instance) },
1055                 { 'n', new ModeUserServerNoticeMask(Instance) },
1056                 { 0, NULL }
1057         };
1058
1059         /* Clear mode list */
1060         memset(modehandlers, 0, sizeof(modehandlers));
1061         memset(modewatchers, 0, sizeof(modewatchers));
1062
1063         /* Last parse string */
1064         LastParse.clear();
1065
1066         /* Initialise the RFC mode letters */
1067         for (int index = 0; modes[index].modechar; index++)
1068                 this->AddMode(modes[index].handler, modes[index].modechar);
1069 }