src/mode.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
   6  *                       E-mail:
   7  *              <brain@chatspike.net>
   8  *                <Craig@chatspike.net>
   9  *
  10  * Written by Craig Edwards, Craig McLure, and others.
  11  * This program is free but copyrighted software; see
  12  *          the file COPYING for details.
  13  *
  14  * ---------------------------------------------------
  15  */
  16
  17 using namespace std;
  18
  19 #include "inspircd_config.h"
  20 #include "inspircd.h"
  21 #include "configreader.h"
  22 #include <unistd.h>
  23 #include "hash_map.h"
  24 #include "connection.h"
  25 #include "users.h"
  26 #include "modules.h"
  27 #include "inspstring.h"
  28
  29 #include "commands.h"
  30 #include "mode.h"
  31
  32 /* +s (secret) */
  33 #include "modes/cmode_s.h"
  34 /* +p (private) */
  35 #include "modes/cmode_p.h"
  36 /* +b (bans) */
  37 #include "modes/cmode_b.h"
  38 /* +m (moderated) */
  39 #include "modes/cmode_m.h"
  40 /* +t (only (half) ops can change topic) */
  41 #include "modes/cmode_t.h"
  42 /* +n (no external messages) */
  43 #include "modes/cmode_n.h"
  44 /* +i (invite only) */
  45 #include "modes/cmode_i.h"
  46 /* +k (keyed channel) */
  47 #include "modes/cmode_k.h"
  48 /* +l (channel user limit) */
  49 #include "modes/cmode_l.h"
  50 /* +o (channel op) */
  51 #include "modes/cmode_o.h"
  52 /* +h (channel halfop) */
  53 #include "modes/cmode_h.h"
  54 /* +v (channel voice) */
  55 #include "modes/cmode_v.h"
  56
  57 /* +s (server notices) */
  58 #include "modes/umode_s.h"
  59 /* +w (see wallops) */
  60 #include "modes/umode_w.h"
  61 /* +i (invisible) */
  62 #include "modes/umode_i.h"
  63 /* +o (operator) */
  64 #include "modes/umode_o.h"
  65 /* +n (notice mask - our implementation of snomasks) */
  66 #include "modes/umode_n.h"
  67
  68 ModeHandler::ModeHandler(InspIRCd* Instance, char modeletter, int parameters_on, int parameters_off, bool listmode, ModeType type, bool operonly, char mprefix)
  69         : ServerInstance(Instance), mode(modeletter), n_params_on(parameters_on), n_params_off(parameters_off), list(listmode), m_type(type), oper(operonly), prefix(mprefix)
  70 {
  71 }
  72
  73 ModeHandler::~ModeHandler()
  74 {
  75 }
  76
  77 bool ModeHandler::IsListMode()
  78 {
  79         return list;
  80 }
  81
  82 unsigned int ModeHandler::GetPrefixRank()
  83 {
  84         return 0;
  85 }
  86
  87 ModeType ModeHandler::GetModeType()
  88 {
  89         return m_type;
  90 }
  91
  92 bool ModeHandler::NeedsOper()
  93 {
  94         return oper;
  95 }
  96
  97 char ModeHandler::GetPrefix()
  98 {
  99         return prefix;
 100 }
 101
 102 int ModeHandler::GetNumParams(bool adding)
 103 {
 104         return adding ? n_params_on : n_params_off;
 105 }
 106
 107 char ModeHandler::GetModeChar()
 108 {
 109         return mode;
 110 }
 111
 112 ModeAction ModeHandler::OnModeChange(userrec* source, userrec* dest, chanrec* channel, std::string &parameter, bool adding)
 113 {
 114         return MODEACTION_DENY;
 115 }
 116
 117 ModePair ModeHandler::ModeSet(userrec* source, userrec* dest, chanrec* channel, const std::string &parameter)
 118 {
 119         if (dest)
 120         {
 121                 return std::make_pair(dest->IsModeSet(this->mode), "");
 122         }
 123         else
 124         {
 125                 return std::make_pair(channel->IsModeSet(this->mode), "");
 126         }
 127 }
 128
 129 void ModeHandler::DisplayList(userrec* user, chanrec* channel)
 130 {
 131 }
 132
 133 bool ModeHandler::CheckTimeStamp(time_t theirs, time_t ours, const std::string &their_param, const std::string &our_param, chanrec* channel)
 134 {
 135         return (ours < theirs);
 136 }
 137
 138 ModeWatcher::ModeWatcher(InspIRCd* Instance, char modeletter, ModeType type) : ServerInstance(Instance), mode(modeletter), m_type(type)
 139 {
 140 }
 141
 142 ModeWatcher::~ModeWatcher()
 143 {
 144 }
 145
 146 char ModeWatcher::GetModeChar()
 147 {
 148         return mode;
 149 }
 150
 151 ModeType ModeWatcher::GetModeType()
 152 {
 153         return m_type;
 154 }
 155
 156 bool ModeWatcher::BeforeMode(userrec* source, userrec* dest, chanrec* channel, std::string &parameter, bool adding, ModeType type)
 157 {
 158         return true;
 159 }
 160
 161 void ModeWatcher::AfterMode(userrec* source, userrec* dest, chanrec* channel, const std::string &parameter, bool adding, ModeType type)
 162 {
 163 }
 164
 165 userrec* ModeParser::SanityChecks(userrec *user,const char *dest,chanrec *chan,int status)
 166 {
 167         userrec *d;
 168         if ((!user) || (!dest) || (!chan) || (!*dest))
 169         {
 170                 return NULL;
 171         }
 172         d = ServerInstance->FindNick(dest);
 173         if (!d)
 174         {
 175                 user->WriteServ("401 %s %s :No such nick/channel",user->nick, dest);
 176                 return NULL;
 177         }
 178         return d;
 179 }
 180
 181 const char* ModeParser::Grant(userrec *d,chanrec *chan,int MASK)
 182 {
 183         if (!chan)
 184                 return "";
 185
 186         for (std::vector<ucrec*>::const_iterator i = d->chans.begin(); i != d->chans.end(); i++)
 187         {
 188                 ucrec* n = (ucrec*)(*i);
 189                 if (n->channel == chan)
 190                 {
 191                         if (n->uc_modes & MASK)
 192                         {
 193                                 return "";
 194                         }
 195                         n->uc_modes = n->uc_modes | MASK;
 196                         switch (MASK)
 197                         {
 198                                 case UCMODE_OP:
 199                                         n->channel->AddOppedUser(d);
 200                                 break;
 201                                 case UCMODE_HOP:
 202                                         n->channel->AddHalfoppedUser(d);
 203                                 break;
 204                                 case UCMODE_VOICE:
 205                                         n->channel->AddVoicedUser(d);
 206                                 break;
 207                         }
 208                         ServerInstance->Log(DEBUG,"grant: %s %s",n->channel->name,d->nick);
 209                         return d->nick;
 210                 }
 211         }
 212         return "";
 213 }
 214
 215 const char* ModeParser::Revoke(userrec *d,chanrec *chan,int MASK)
 216 {
 217         if (!chan)
 218                 return "";
 219
 220         for (std::vector<ucrec*>::const_iterator i = d->chans.begin(); i != d->chans.end(); i++)
 221         {
 222                 ucrec* n = (ucrec*)(*i);
 223                 if (n->channel == chan)
 224                 {
 225                         if ((n->uc_modes & MASK) == 0)
 226                         {
 227                                 return "";
 228                         }
 229                         n->uc_modes ^= MASK;
 230                         switch (MASK)
 231                         {
 232                                 case UCMODE_OP:
 233                                         n->channel->DelOppedUser(d);
 234                                 break;
 235                                 case UCMODE_HOP:
 236                                         n->channel->DelHalfoppedUser(d);
 237                                 break;
 238                                 case UCMODE_VOICE:
 239                                         n->channel->DelVoicedUser(d);
 240                                 break;
 241                         }
 242                         ServerInstance->Log(DEBUG,"revoke: %s %s",n->channel->name,d->nick);
 243                         return d->nick;
 244                 }
 245         }
 246         return "";
 247 }
 248
 249 void ModeParser::DisplayCurrentModes(userrec *user, userrec* targetuser, chanrec* targetchannel, const char* text)
 250 {
 251         if (targetchannel)
 252         {
 253                 /* Display channel's current mode string */
 254                 user->WriteServ("324 %s %s +%s",user->nick, targetchannel->name, targetchannel->ChanModes(targetchannel->HasUser(user)));
 255                 user->WriteServ("329 %s %s %d", user->nick, targetchannel->name, targetchannel->created);
 256                 return;
 257         }
 258         else if (targetuser)
 259         {
 260                 /* Display user's current mode string */
 261                 user->WriteServ("221 %s :+%s",targetuser->nick,targetuser->FormatModes());
 262                 user->WriteServ("008 %s :+%s", targetuser->nick, targetuser->FormatNoticeMasks());
 263                 return;
 264         }
 265
 266         /* No such nick/channel */
 267         user->WriteServ("401 %s %s :No such nick/channel",user->nick, text);
 268         return;
 269 }
 270
 271 void ModeParser::Process(const char** parameters, int pcnt, userrec *user, bool servermode)
 272 {
 273         std::string target = parameters[0];
 274         ModeType type = MODETYPE_USER;
 275         unsigned char mask = 0;
 276         chanrec* targetchannel = ServerInstance->FindChan(parameters[0]);
 277         userrec* targetuser  = ServerInstance->FindNick(parameters[0]);
 278
 279         ServerInstance->Log(DEBUG,"ModeParser::Process start");
 280
 281         /* Special case for displaying the list for listmodes,
 282          * e.g. MODE #chan b, or MODE #chan +b without a parameter
 283          */
 284         if ((targetchannel) && (pcnt == 2))
 285         {
 286                 ServerInstance->Log(DEBUG,"Spool list");
 287                 const char* mode = parameters[1];
 288                 if (*mode == '+')
 289                         mode++;
 290                 unsigned char handler_id = ((*mode) - 65) | MASK_CHANNEL;
 291                 ModeHandler* mh = modehandlers[handler_id];
 292                 if ((mh) && (mh->IsListMode()))
 293                 {
 294                         mh->DisplayList(user, targetchannel);
 295                         return;
 296                 }
 297         }
 298
 299         if (pcnt == 1)
 300         {
 301                 ServerInstance->Log(DEBUG,"Mode list request");
 302                 this->DisplayCurrentModes(user, targetuser, targetchannel, parameters[0]);
 303         }
 304         else if (pcnt > 1)
 305         {
 306                 ServerInstance->Log(DEBUG,"More than one parameter");
 307
 308                 if (targetchannel)
 309                 {
 310                         type = MODETYPE_CHANNEL;
 311                         mask = MASK_CHANNEL;
 312
 313                         /* Extra security checks on channel modes
 314                          * (e.g. are they a (half)op?
 315                          */
 316
 317                         if ((IS_LOCAL(user)) && (targetchannel->GetStatus(user) < STATUS_HOP))
 318                         {
 319                                 /* We don't have halfop */
 320                                 ServerInstance->Log(DEBUG,"The user is not a halfop or above, checking other reasons for being able to set the modes");
 321
 322                                 /* Are we a uline or is it a servermode? */
 323                                 if ((!ServerInstance->ULine(user->server)) && (!servermode))
 324                                 {
 325                                         /* Not enough permission:
 326                                          * NOT a uline and NOT a servermode,
 327                                          * OR, NOT halfop or above.
 328                                          */
 329                                         user->WriteServ("482 %s %s :You're not a channel (half)operator",user->nick, targetchannel->name);
 330                                         return;
 331                                 }
 332                         }
 333                 }
 334                 else if (targetuser)
 335                 {
 336                         type = MODETYPE_USER;
 337                         mask = MASK_USER;
 338                 }
 339                 else
 340                 {
 341                         /* No such nick/channel */
 342                         user->WriteServ("401 %s %s :No such nick/channel",user->nick, parameters[0]);
 343                         return;
 344                 }
 345
 346                 std::string mode_sequence = parameters[1];
 347                 std::string parameter = "";
 348                 std::ostringstream parameter_list;
 349                 std::string output_sequence = "";
 350                 bool adding = true, state_change = false;
 351                 unsigned char handler_id = 0;
 352                 int parameter_counter = 2; /* Index of first parameter */
 353
 354                 /* A mode sequence that doesnt start with + or -. Assume +. - Thanks for the suggestion spike (bug#132) */
 355                 if ((*mode_sequence.begin() != '+') && (*mode_sequence.begin() != '-'))
 356                         mode_sequence.insert(0, "+");
 357
 358                 for (std::string::const_iterator letter = mode_sequence.begin(); letter != mode_sequence.end(); letter++)
 359                 {
 360                         unsigned char modechar = *letter;
 361
 362                         ServerInstance->Log(DEBUG,"Process letter %c", modechar);
 363
 364                         switch (modechar)
 365                         {
 366                                 /* NB:
 367                                  * For + and - mode characters, we don't just stick the character into the output sequence.
 368                                  * This is because the user may do something dumb, like: +-+ooo or +oo-+. To prevent this
 369                                  * appearing in the output sequence, we store a flag which says there was a state change,
 370                                  * which is set on any + or -, however, the + or - that we finish on is only appended to
 371                                  * the output stream in the event it is followed by a non "+ or -" character, such as o or v.
 372                                  */
 373                                 case '+':
 374                                         /* The following expression prevents: +o+o nick nick, compressing it to +oo nick nick,
 375                                          * however, will allow the + if it is the first item in the sequence, regardless.
 376                                          */
 377                                         if ((!adding) || (!output_sequence.length()))
 378                                                 state_change = true;
 379                                         adding = true;
 380                                         continue;
 381                                 break;
 382                                 case '-':
 383                                         if ((adding) || (!output_sequence.length()))
 384                                                 state_change = true;
 385                                         adding = false;
 386                                         continue;
 387                                 break;
 388                                 default:
 389
 390                                         /**
 391                                          * Watch carefully for the sleight of hand trick.
 392                                          * 65 is the ascii value of 'A'. We take this from
 393                                          * the char we're looking at to get a number between
 394                                          * 1 and 127. We then logic-or it to get the hashed
 395                                          * position, dependent on wether its a channel or
 396                                          * a user mode. This is a little stranger, but a lot
 397                                          * faster, than using a map of pairs.
 398                                          */
 399                                         handler_id = (modechar - 65) | mask;
 400
 401                                         if (modehandlers[handler_id])
 402                                         {
 403                                                 bool abort = false;
 404
 405                                                 for (ModeWatchIter watchers = modewatchers[handler_id].begin(); watchers != modewatchers[handler_id].end(); watchers++)
 406                                                 {
 407                                                         if ((*watchers)->BeforeMode(user, targetuser, targetchannel, parameter, adding, type) == MODEACTION_DENY)
 408                                                                 abort = true;
 409                                                 }
 410                                                 if ((modehandlers[handler_id]->GetModeType() == type) && (!abort))
 411                                                 {
 412                                                         if (modehandlers[handler_id]->GetNumParams(adding))
 413                                                         {
 414                                                                 /* This mode expects a parameter, do we have any parameters left in our list to use? */
 415                                                                 if (parameter_counter < pcnt)
 416                                                                 {
 417                                                                         parameter = parameters[parameter_counter++];
 418
 419                                                                         /* Yerk, invalid! */
 420                                                                         if ((parameter.rfind(':') != std::string::npos) || (parameter.rfind(' ') != std::string::npos))
 421                                                                                 parameter = "";
 422                                                                 }
 423                                                                 else
 424                                                                 {
 425                                                                         /* No parameter, continue to the next mode */
 426                                                                         continue;
 427                                                                 }
 428                                                         }
 429
 430                                                         /* It's an oper only mode, check if theyre an oper. If they arent,
 431                                                          * eat any parameter that  came with the mode, and continue to next
 432                                                          */
 433                                                         if ((IS_LOCAL(user)) && (modehandlers[handler_id]->NeedsOper()) && (!*user->oper))
 434                                                                 continue;
 435
 436                                                         /* Call the handler for the mode */
 437                                                         ModeAction ma = modehandlers[handler_id]->OnModeChange(user, targetuser, targetchannel, parameter, adding);
 438
 439                                                         if ((modehandlers[handler_id]->GetNumParams(adding)) && (parameter == ""))
 440                                                         {
 441                                                                 /* The handler nuked the parameter and they are supposed to have one.
 442                                                                  * We CANT continue now, even if they actually returned MODEACTION_ALLOW,
 443                                                                  * so we bail to the next mode character.
 444                                                                  */
 445                                                                 continue;
 446                                                         }
 447
 448                                                         if (ma == MODEACTION_ALLOW)
 449                                                         {
 450                                                                 /* We're about to output a valid mode letter - was there previously a pending state-change? */
 451                                                                 if (state_change)
 452                                                                         output_sequence.append(adding ? "+" : "-");
 453
 454                                                                 /* Add the mode letter */
 455                                                                 output_sequence.push_back(modechar);
 456
 457                                                                 /* Is there a valid parameter for this mode? If so add it to the parameter list */
 458                                                                 if ((modehandlers[handler_id]->GetNumParams(adding)) && (parameter != ""))
 459                                                                 {
 460                                                                         parameter_list << " " << parameter;
 461                                                                         /* Does this mode have a prefix? */
 462                                                                         if (modehandlers[handler_id]->GetPrefix() && targetchannel)
 463                                                                         {
 464                                                                                 userrec* user_to_prefix = ServerInstance->FindNick(parameter);
 465                                                                                 if (user_to_prefix)
 466                                                                                         targetchannel->SetPrefix(user_to_prefix, modehandlers[handler_id]->GetPrefix(),
 467                                                                                                         modehandlers[handler_id]->GetPrefixRank(), adding);
 468                                                                         }
 469                                                                 }
 470
 471                                                                 /* Call all the AfterMode events in the mode watchers for this mode */
 472                                                                 for (ModeWatchIter watchers = modewatchers[handler_id].begin(); watchers != modewatchers[handler_id].end(); watchers++)
 473                                                                         (*watchers)->AfterMode(user, targetuser, targetchannel, parameter, adding, type);
 474
 475                                                                 /* Reset the state change flag */
 476                                                                 state_change = false;
 477                                                         }
 478                                                 }
 479                                         }
 480                                         else
 481                                         {
 482                                                 /* No mode handler? Unknown mode character then. */
 483                                                 user->WriteServ("472 %s %c :is unknown mode char to me",user->nick, modechar);
 484                                         }
 485                                 break;
 486                         }
 487                 }
 488                 /* Was there at least one valid mode in the sequence? */
 489                 if (output_sequence != "")
 490                 {
 491                         if (servermode)
 492                         {
 493                                 if (type == MODETYPE_CHANNEL)
 494                                 {
 495                                         targetchannel->WriteChannelWithServ(ServerInstance->Config->ServerName, "MODE %s %s%s", targetchannel->name, output_sequence.c_str(), parameter_list.str().c_str());
 496                                 }
 497                                 else
 498                                 {
 499                                         targetuser->WriteServ("MODE %s %s%s",targetuser->nick,output_sequence.c_str(), parameter_list.str().c_str());
 500                                 }
 501                         }
 502                         else
 503                         {
 504                                 if (type == MODETYPE_CHANNEL)
 505                                 {
 506                                         ServerInstance->Log(DEBUG,"Write output sequence and parameters to channel: %s %s%s",targetchannel->name,output_sequence.c_str(),parameter_list.str().c_str());
 507                                         targetchannel->WriteChannel(user,"MODE %s %s%s",targetchannel->name,output_sequence.c_str(),parameter_list.str().c_str());
 508                                         FOREACH_MOD(I_OnMode,OnMode(user, targetchannel, TYPE_CHANNEL, output_sequence + parameter_list.str()));
 509                                 }
 510                                 else
 511                                 {
 512                                         user->WriteTo(targetuser,"MODE %s %s%s",targetuser->nick,output_sequence.c_str(), parameter_list.str().c_str());
 513                                         FOREACH_MOD(I_OnMode,OnMode(user, targetuser, TYPE_USER, output_sequence));
 514                                 }
 515                         }
 516                 }
 517         }
 518 }
 519
 520
 521 void cmd_mode::Handle (const char** parameters, int pcnt, userrec *user)
 522 {
 523         if (!user)
 524                 return;
 525
 526         ServerInstance->Modes->Process(parameters, pcnt, user, false);
 527
 528         return;
 529 }
 530
 531 void ModeParser::CleanMask(std::string &mask)
 532 {
 533         std::string::size_type pos_of_pling = mask.find_first_of('!');
 534         std::string::size_type pos_of_at = mask.find_first_of('@');
 535         std::string::size_type pos_of_dot = mask.find_first_of('.');
 536         std::string::size_type pos_of_colon = mask.find_first_of(':'); /* Because ipv6 addresses are colon delimited */
 537
 538         if ((pos_of_pling == std::string::npos) && (pos_of_at == std::string::npos))
 539         {
 540                 /* Just a nick, or just a host */
 541                 if ((pos_of_dot == std::string::npos) && (pos_of_colon == std::string::npos))
 542                 {
 543                         /* It has no '.' in it, it must be a nick. */
 544                         mask.append("!*@*");
 545                 }
 546                 else
 547                 {
 548                         /* Got a dot in it? Has to be a host */
 549                         mask = "*!*@" + mask;
 550                 }
 551         }
 552         else if ((pos_of_pling == std::string::npos) && (pos_of_at != std::string::npos))
 553         {
 554                 /* Has an @ but no !, its a user@host */
 555                  mask = "*!" + mask;
 556         }
 557         else if ((pos_of_pling != std::string::npos) && (pos_of_at == std::string::npos))
 558         {
 559                 /* Has a ! but no @, it must be a nick!ident */
 560                 mask.append("@*");
 561         }
 562 }
 563
 564 bool ModeParser::AddMode(ModeHandler* mh, unsigned const char modeletter)
 565 {
 566         unsigned char mask = 0;
 567         unsigned char pos = 0;
 568
 569         /* Yes, i know, this might let people declare modes like '_' or '^'.
 570          * If they do that, thats their problem, and if i ever EVER see an
 571          * official InspIRCd developer do that, i'll beat them with a paddle!
 572          */
 573         if ((mh->GetModeChar() < 'A') || (mh->GetModeChar() > 'z'))
 574                 return false;
 575
 576         /* A mode prefix of ',' is not acceptable, it would fuck up server to server.
 577          * A mode prefix of ':' will fuck up both server to server, and client to server.
 578          */
 579         if ((mh->GetPrefix() == ',') || (mh->GetPrefix() == ':'))
 580                 return false;
 581
 582         mh->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
 583         pos = (mh->GetModeChar()-65) | mask;
 584
 585         if (modehandlers[pos])
 586                 return false;
 587
 588         modehandlers[pos] = mh;
 589         ServerInstance->Log(DEBUG,"ModeParser::AddMode: added mode %c",mh->GetModeChar());
 590         return true;
 591 }
 592
 593 ModeHandler* ModeParser::FindMode(unsigned const char modeletter, ModeType mt)
 594 {
 595         unsigned char mask = 0;
 596         unsigned char pos = 0;
 597
 598         if ((modeletter < 'A') || (modeletter > 'z'))
 599                 return NULL;
 600
 601         mt == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
 602         pos = (modeletter-65) | mask;
 603
 604         return modehandlers[pos];
 605 }
 606
 607 std::string ModeParser::UserModeList()
 608 {
 609         char modestr[256];
 610         int pointer = 0;
 611
 612         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 613         {
 614                 unsigned char pos = (mode-65) | MASK_USER;
 615
 616                 if (modehandlers[pos])
 617                         modestr[pointer++] = mode;
 618         }
 619         modestr[pointer++] = 0;
 620         return modestr;
 621 }
 622
 623 std::string ModeParser::ChannelModeList()
 624 {
 625         char modestr[256];
 626         int pointer = 0;
 627
 628         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 629         {
 630                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 631
 632                 if (modehandlers[pos])
 633                         modestr[pointer++] = mode;
 634         }
 635         modestr[pointer++] = 0;
 636         return modestr;
 637 }
 638
 639 std::string ModeParser::ParaModeList()
 640 {
 641         char modestr[256];
 642         int pointer = 0;
 643
 644         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 645         {
 646                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 647
 648                 if ((modehandlers[pos]) && (modehandlers[pos]->GetNumParams(true)))
 649                         modestr[pointer++] = mode;
 650         }
 651         modestr[pointer++] = 0;
 652         return modestr;
 653 }
 654
 655 ModeHandler* ModeParser::FindPrefix(unsigned const char pfxletter)
 656 {
 657         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 658         {
 659                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 660
 661                 if ((modehandlers[pos]) && (modehandlers[pos]->GetPrefix() == pfxletter))
 662                 {
 663                         return modehandlers[pos];
 664                 }
 665         }
 666         return NULL;
 667 }
 668
 669 std::string ModeParser::ModeString(userrec* user, chanrec* channel)
 670 {
 671         std::string types;
 672         std::string pars;
 673
 674         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 675         {
 676                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 677                 ModeHandler* mh = modehandlers[pos];
 678                 if ((mh) && (mh->GetNumParams(true)) && (mh->GetNumParams(false)))
 679                 {
 680                         ModePair ret;
 681                         ret = mh->ModeSet(NULL, user, channel, user->nick);
 682                         if (ret.first)
 683                         {
 684                                 pars.append(" ");
 685                                 pars.append(user->nick);
 686                                 types.push_back(mh->GetModeChar());
 687                         }
 688                 }
 689         }
 690
 691         return types+pars;
 692 }
 693
 694 std::string ModeParser::ChanModes()
 695 {
 696         std::string type1;      /* Listmodes EXCEPT those with a prefix */
 697         std::string type2;      /* Modes that take a param when adding or removing */
 698         std::string type3;      /* Modes that only take a param when adding */
 699         std::string type4;      /* Modes that dont take a param */
 700
 701         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 702         {
 703                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 704                  /* One parameter when adding */
 705                 if (modehandlers[pos])
 706                 {
 707                         if (modehandlers[pos]->GetNumParams(true))
 708                         {
 709                                 if ((modehandlers[pos]->IsListMode()) && (!modehandlers[pos]->GetPrefix()))
 710                                 {
 711                                         type1 += modehandlers[pos]->GetModeChar();
 712                                 }
 713                                 else
 714                                 {
 715                                         /* ... and one parameter when removing */
 716                                         if (modehandlers[pos]->GetNumParams(false))
 717                                         {
 718                                                 /* But not a list mode */
 719                                                 if (!modehandlers[pos]->GetPrefix())
 720                                                 {
 721                                                         type2 += modehandlers[pos]->GetModeChar();
 722                                                 }
 723                                         }
 724                                         else
 725                                         {
 726                                                 /* No parameters when removing */
 727                                                 type3 += modehandlers[pos]->GetModeChar();
 728                                         }
 729                                 }
 730                         }
 731                         else
 732                         {
 733                                 type4 += modehandlers[pos]->GetModeChar();
 734                         }
 735                 }
 736
 737         }
 738
 739         return type1 + "," + type2 + "," + type3 + "," + type4;
 740 }
 741
 742 bool ModeParser::PrefixComparison(const prefixtype one, const prefixtype two)
 743 {
 744         return one.second > two.second;
 745 }
 746
 747 std::string ModeParser::BuildPrefixes()
 748 {
 749         std::string mletters = "";
 750         std::string mprefixes = "";
 751         pfxcontainer pfx;
 752         std::map<char,char> prefix_to_mode;
 753
 754         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 755         {
 756                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 757
 758                 if ((modehandlers[pos]) && (modehandlers[pos]->GetPrefix()))
 759                 {
 760                         pfx.push_back(std::make_pair<char,unsigned int>(modehandlers[pos]->GetPrefix(), modehandlers[pos]->GetPrefixRank()));
 761                         prefix_to_mode[modehandlers[pos]->GetPrefix()] = modehandlers[pos]->GetModeChar();
 762                 }
 763         }
 764
 765         sort(pfx.begin(), pfx.end(), ModeParser::PrefixComparison);
 766
 767         for (pfxcontainer::iterator n = pfx.begin(); n != pfx.end(); n++)
 768         {
 769                 mletters = mletters + n->first;
 770                 mprefixes = mprefixes + prefix_to_mode.find(n->first)->second;
 771         }
 772
 773         return "(" + mprefixes + ")" + mletters;
 774 }
 775
 776 bool ModeParser::AddModeWatcher(ModeWatcher* mw)
 777 {
 778         unsigned char mask = 0;
 779         unsigned char pos = 0;
 780
 781         if (!mw)
 782                 return false;
 783
 784         if ((mw->GetModeChar() < 'A') || (mw->GetModeChar() > 'z'))
 785                 return false;
 786
 787         mw->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
 788         pos = (mw->GetModeChar()-65) | mask;
 789
 790         modewatchers[pos].push_back(mw);
 791         ServerInstance->Log(DEBUG,"ModeParser::AddModeWatcher: watching mode %c",mw->GetModeChar());
 792
 793         return true;
 794 }
 795
 796 bool ModeParser::DelModeWatcher(ModeWatcher* mw)
 797 {
 798         unsigned char mask = 0;
 799         unsigned char pos = 0;
 800
 801         if (!mw)
 802                 return false;
 803
 804         if ((mw->GetModeType() < 'A') || (mw->GetModeType() > 'z'))
 805                 return false;
 806
 807         mw->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
 808         pos = (mw->GetModeChar()-65) | mask;
 809
 810         ModeWatchIter a = find(modewatchers[pos].begin(),modewatchers[pos].end(),mw);
 811
 812         if (a == modewatchers[pos].end())
 813                 return false;
 814
 815         modewatchers[pos].erase(a);
 816         ServerInstance->Log(DEBUG,"ModeParser::DelModeWatcher: stopped watching mode %c",mw->GetModeChar());
 817
 818         return true;
 819 }
 820
 821 ModeParser::ModeParser(InspIRCd* Instance) : ServerInstance(Instance)
 822 {
 823         /* Clear mode list */
 824         memset(modehandlers, 0, sizeof(modehandlers));
 825         memset(modewatchers, 0, sizeof(modewatchers));
 826
 827         /* Initialise the RFC mode letters */
 828
 829         /* Start with channel simple modes, no params */
 830         this->AddMode(new ModeChannelSecret(Instance), 's');
 831         this->AddMode(new ModeChannelPrivate(Instance), 'p');
 832         this->AddMode(new ModeChannelModerated(Instance), 'm');
 833         this->AddMode(new ModeChannelTopicOps(Instance), 't');
 834         this->AddMode(new ModeChannelNoExternal(Instance), 'n');
 835         this->AddMode(new ModeChannelInviteOnly(Instance), 'i');
 836
 837         /* Cannel modes with params */
 838         this->AddMode(new ModeChannelKey(Instance), 'k');
 839         this->AddMode(new ModeChannelLimit(Instance), 'l');
 840
 841         /* Channel listmodes */
 842         this->AddMode(new ModeChannelBan(Instance), 'b');
 843         this->AddMode(new ModeChannelOp(Instance), 'o');
 844         this->AddMode(new ModeChannelHalfOp(Instance), 'h');
 845         this->AddMode(new ModeChannelVoice(Instance), 'v');
 846
 847         /* Now for usermodes */
 848         this->AddMode(new ModeUserServerNotice(Instance), 's');
 849         this->AddMode(new ModeUserWallops(Instance), 'w');
 850         this->AddMode(new ModeUserInvisible(Instance), 'i');
 851         this->AddMode(new ModeUserOperator(Instance), 'o');
 852         this->AddMode(new ModeUserServerNoticeMask(Instance), 'n');
 853 }
 854