src/channels.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2009 InspIRCd Development Team
   6  * See: http://wiki.inspircd.org/Credits
   7  *
   8  * This program is free but copyrighted software; see
   9  *            the file COPYING for details.
  10  *
  11  * ---------------------------------------------------
  12  */
  13
  14 /* $Core */
  15
  16 #include "inspircd.h"
  17 #include <cstdarg>
  18 #include "mode.h"
  19
  20 Channel::Channel(InspIRCd* Instance, const std::string &cname, time_t ts) : ServerInstance(Instance)
  21 {
  22         chan_hash::iterator findchan = ServerInstance->chanlist->find(cname);
  23         if (findchan != Instance->chanlist->end())
  24                 throw CoreException("Cannot create duplicate channel " + cname);
  25
  26         (*(ServerInstance->chanlist))[cname.c_str()] = this;
  27         this->name.assign(cname, 0, ServerInstance->Config->Limits.ChanMax);
  28         this->age = ts ? ts : ServerInstance->Time();
  29
  30         maxbans = topicset = 0;
  31         modes.reset();
  32 }
  33
  34 void Channel::SetMode(char mode,bool mode_on)
  35 {
  36         modes[mode-65] = mode_on;
  37 }
  38
  39 void Channel::SetModeParam(char mode, std::string parameter)
  40 {
  41         CustomModeList::iterator n = custom_mode_params.find(mode);
  42         // always erase, even if changing, so that the map gets the new value
  43         if (n != custom_mode_params.end())
  44                 custom_mode_params.erase(n);
  45         if (parameter.empty())
  46         {
  47                 modes[mode-65] = false;
  48         }
  49         else
  50         {
  51                 custom_mode_params[mode] = parameter;
  52                 modes[mode-65] = true;
  53         }
  54 }
  55
  56 std::string Channel::GetModeParameter(char mode)
  57 {
  58         CustomModeList::iterator n = custom_mode_params.find(mode);
  59         if (n != custom_mode_params.end())
  60                 return n->second;
  61         return "";
  62 }
  63
  64 int Channel::SetTopic(User *u, std::string &ntopic, bool forceset)
  65 {
  66         if (u)
  67         {
  68                 if(!forceset)
  69                 {
  70                         ModResult res;
  71                         /* 0: check status, 1: don't, -1: disallow change silently */
  72
  73                         FIRST_MOD_RESULT(ServerInstance, OnPreTopicChange, res, (u,this,ntopic));
  74
  75                         if (res == MOD_RES_DENY)
  76                                 return CMD_FAILURE;
  77                         if (res != MOD_RES_ALLOW)
  78                         {
  79                                 if (!this->HasUser(u))
  80                                 {
  81                                         u->WriteNumeric(442, "%s %s :You're not on that channel!",u->nick.c_str(), this->name.c_str());
  82                                         return CMD_FAILURE;
  83                                 }
  84                                 if ((this->IsModeSet('t')) && (this->GetStatus(u) < STATUS_HOP))
  85                                 {
  86                                         u->WriteNumeric(482, "%s %s :You must be at least a half-operator to change the topic on this channel", u->nick.c_str(), this->name.c_str());
  87                                         return CMD_FAILURE;
  88                                 }
  89                         }
  90                 }
  91         }
  92
  93         this->topic.assign(ntopic, 0, ServerInstance->Config->Limits.MaxTopic);
  94         if (u)
  95         {
  96                 this->setby.assign(ServerInstance->Config->FullHostInTopic ? u->GetFullHost() : u->nick, 0, 128);
  97                 this->WriteChannel(u, "TOPIC %s :%s", this->name.c_str(), this->topic.c_str());
  98         }
  99         else
 100         {
 101                 this->setby.assign(ServerInstance->Config->ServerName);
 102                 this->WriteChannelWithServ(ServerInstance->Config->ServerName, "TOPIC %s :%s", this->name.c_str(), this->topic.c_str());
 103         }
 104
 105         this->topicset = ServerInstance->Time();
 106
 107         // XXX: this check for 'u' is probably pre-fake-user, and it fucking sucks anyway. we need to change this.
 108         if (u)
 109         {
 110                 FOREACH_MOD(I_OnPostTopicChange,OnPostTopicChange(u, this, this->topic));
 111         }
 112
 113         return CMD_SUCCESS;
 114 }
 115
 116 long Channel::GetUserCounter()
 117 {
 118         return (this->internal_userlist.size());
 119 }
 120
 121 void Channel::AddUser(User* user)
 122 {
 123         internal_userlist[user] = user->nick;
 124 }
 125
 126 unsigned long Channel::DelUser(User* user)
 127 {
 128         CUListIter a = internal_userlist.find(user);
 129
 130         if (a != internal_userlist.end())
 131         {
 132                 internal_userlist.erase(a);
 133                 /* And tidy any others... */
 134                 DelOppedUser(user);
 135                 DelHalfoppedUser(user);
 136                 DelVoicedUser(user);
 137         }
 138
 139         return internal_userlist.size();
 140 }
 141
 142 bool Channel::HasUser(User* user)
 143 {
 144         return (internal_userlist.find(user) != internal_userlist.end());
 145 }
 146
 147 void Channel::AddOppedUser(User* user)
 148 {
 149         internal_op_userlist[user] = user->nick;
 150 }
 151
 152 void Channel::DelOppedUser(User* user)
 153 {
 154         CUListIter a = internal_op_userlist.find(user);
 155         if (a != internal_op_userlist.end())
 156         {
 157                 internal_op_userlist.erase(a);
 158                 return;
 159         }
 160 }
 161
 162 void Channel::AddHalfoppedUser(User* user)
 163 {
 164         internal_halfop_userlist[user] = user->nick;
 165 }
 166
 167 void Channel::DelHalfoppedUser(User* user)
 168 {
 169         CUListIter a = internal_halfop_userlist.find(user);
 170
 171         if (a != internal_halfop_userlist.end())
 172         {
 173                 internal_halfop_userlist.erase(a);
 174         }
 175 }
 176
 177 void Channel::AddVoicedUser(User* user)
 178 {
 179         internal_voice_userlist[user] = user->nick;
 180 }
 181
 182 void Channel::DelVoicedUser(User* user)
 183 {
 184         CUListIter a = internal_voice_userlist.find(user);
 185
 186         if (a != internal_voice_userlist.end())
 187         {
 188                 internal_voice_userlist.erase(a);
 189         }
 190 }
 191
 192 CUList* Channel::GetUsers()
 193 {
 194         return &internal_userlist;
 195 }
 196
 197 CUList* Channel::GetOppedUsers()
 198 {
 199         return &internal_op_userlist;
 200 }
 201
 202 CUList* Channel::GetHalfoppedUsers()
 203 {
 204         return &internal_halfop_userlist;
 205 }
 206
 207 CUList* Channel::GetVoicedUsers()
 208 {
 209         return &internal_voice_userlist;
 210 }
 211
 212 void Channel::SetDefaultModes()
 213 {
 214         ServerInstance->Logs->Log("CHANNELS", DEBUG, "SetDefaultModes %s", ServerInstance->Config->DefaultModes);
 215         irc::spacesepstream list(ServerInstance->Config->DefaultModes);
 216         std::string modeseq;
 217         std::string parameter;
 218
 219         list.GetToken(modeseq);
 220
 221         for (std::string::iterator n = modeseq.begin(); n != modeseq.end(); ++n)
 222         {
 223                 ModeHandler* mode = ServerInstance->Modes->FindMode(*n, MODETYPE_CHANNEL);
 224                 if (mode)
 225                 {
 226                         if (mode->GetNumParams(true))
 227                                 list.GetToken(parameter);
 228                         else
 229                                 parameter.clear();
 230
 231                         mode->OnModeChange(ServerInstance->FakeClient, ServerInstance->FakeClient, this, parameter, true);
 232                 }
 233         }
 234 }
 235
 236 /*
 237  * add a channel to a user, creating the record for it if needed and linking
 238  * it to the user record
 239  */
 240 Channel* Channel::JoinUser(InspIRCd* Instance, User *user, const char* cn, bool override, const char* key, bool bursting, time_t TS)
 241 {
 242         // Fix: unregistered users could be joined using /SAJOIN
 243         if (!user || !cn || user->registered != REG_ALL)
 244                 return NULL;
 245
 246         char cname[MAXBUF];
 247         std::string privs;
 248         Channel *Ptr;
 249
 250         /*
 251          * We don't restrict the number of channels that remote users or users that are override-joining may be in.
 252          * We restrict local users to MaxChans channels.
 253          * We restrict local operators to OperMaxChans channels.
 254          * This is a lot more logical than how it was formerly. -- w00t
 255          */
 256         if (IS_LOCAL(user) && !override)
 257         {
 258                 // Checking MyClass exists because we *may* get here with NULL, not 100% sure.
 259                 if (user->MyClass && user->MyClass->maxchans)
 260                 {
 261                         if (user->HasPrivPermission("channels/high-join-limit"))
 262                         {
 263                                 if (user->chans.size() >= Instance->Config->OperMaxChans)
 264                                 {
 265                                         user->WriteNumeric(ERR_TOOMANYCHANNELS, "%s %s :You are on too many channels",user->nick.c_str(), cn);
 266                                         return NULL;
 267                                 }
 268                         }
 269                         else
 270                         {
 271                                 if (user->chans.size() >= user->MyClass->maxchans)
 272                                 {
 273                                         user->WriteNumeric(ERR_TOOMANYCHANNELS, "%s %s :You are on too many channels",user->nick.c_str(), cn);
 274                                         return NULL;
 275                                 }
 276                         }
 277                 }
 278         }
 279
 280         strlcpy(cname, cn, Instance->Config->Limits.ChanMax);
 281         Ptr = Instance->FindChan(cname);
 282         bool created_by_local = false;
 283
 284         if (!Ptr)
 285         {
 286                 /*
 287                  * Fix: desync bug was here, don't set @ on remote users - spanningtree handles their permissions. bug #358. -- w00t
 288                  */
 289                 if (!IS_LOCAL(user))
 290                 {
 291                         if (!TS)
 292                                 Instance->Logs->Log("CHANNEL",DEBUG,"*** BUG *** Channel::JoinUser called for REMOTE user '%s' on channel '%s' but no TS given!", user->nick.c_str(), cn);
 293                 }
 294                 else
 295                 {
 296                         privs = "@";
 297                         created_by_local = true;
 298                 }
 299
 300                 if (IS_LOCAL(user) && override == false)
 301                 {
 302                         ModResult MOD_RESULT;
 303                         FIRST_MOD_RESULT(Instance, OnUserPreJoin, MOD_RESULT, (user, NULL, cname, privs, key ? key : ""));
 304                         if (MOD_RESULT == MOD_RES_DENY)
 305                                 return NULL;
 306                 }
 307
 308                 Ptr = new Channel(Instance, cname, TS);
 309         }
 310         else
 311         {
 312                 /* Already on the channel */
 313                 if (Ptr->HasUser(user))
 314                         return NULL;
 315
 316                 /*
 317                  * remote users are allowed us to bypass channel modes
 318                  * and bans (used by servers)
 319                  */
 320                 if (IS_LOCAL(user) && override == false)
 321                 {
 322                         ModResult MOD_RESULT;
 323                         FIRST_MOD_RESULT(Instance, OnUserPreJoin, MOD_RESULT, (user, Ptr, cname, privs, key ? key : ""));
 324                         if (MOD_RESULT == MOD_RES_DENY)
 325                         {
 326                                 return NULL;
 327                         }
 328                         else if (MOD_RESULT == MOD_RES_PASSTHRU)
 329                         {
 330                                 std::string ckey = Ptr->GetModeParameter('k');
 331                                 bool invited = user->IsInvited(Ptr->name.c_str());
 332                                 bool can_bypass = Instance->Config->InvBypassModes && invited;
 333
 334                                 if (!ckey.empty())
 335                                 {
 336                                         FIRST_MOD_RESULT(Instance, OnCheckKey, MOD_RESULT, (user, Ptr, key ? key : ""));
 337                                         if (!MOD_RESULT.check((key && ckey == key) || can_bypass))
 338                                         {
 339                                                 // If no key provided, or key is not the right one, and can't bypass +k (not invited or option not enabled)
 340                                                 user->WriteNumeric(ERR_BADCHANNELKEY, "%s %s :Cannot join channel (Incorrect channel key)",user->nick.c_str(), Ptr->name.c_str());
 341                                                 return NULL;
 342                                         }
 343                                 }
 344
 345                                 if (Ptr->IsModeSet('i'))
 346                                 {
 347                                         FIRST_MOD_RESULT(Instance, OnCheckInvite, MOD_RESULT, (user, Ptr));
 348                                         if (!MOD_RESULT.check(invited))
 349                                         {
 350                                                 user->WriteNumeric(ERR_INVITEONLYCHAN, "%s %s :Cannot join channel (Invite only)",user->nick.c_str(), Ptr->name.c_str());
 351                                                 return NULL;
 352                                         }
 353                                 }
 354
 355                                 std::string limit = Ptr->GetModeParameter('l');
 356                                 if (!limit.empty())
 357                                 {
 358                                         FIRST_MOD_RESULT(Instance, OnCheckLimit, MOD_RESULT, (user, Ptr));
 359                                         if (!MOD_RESULT.check((Ptr->GetUserCounter() < atol(limit.c_str()) || can_bypass)))
 360                                         {
 361                                                 user->WriteNumeric(ERR_CHANNELISFULL, "%s %s :Cannot join channel (Channel is full)",user->nick.c_str(), Ptr->name.c_str());
 362                                                 return NULL;
 363                                         }
 364                                 }
 365
 366                                 if (Ptr->IsBanned(user) && !can_bypass)
 367                                 {
 368                                         user->WriteNumeric(ERR_BANNEDFROMCHAN, "%s %s :Cannot join channel (You're banned)",user->nick.c_str(), Ptr->name.c_str());
 369                                         return NULL;
 370                                 }
 371
 372                                 /*
 373                                  * If the user has invites for this channel, remove them now
 374                                  * after a successful join so they don't build up.
 375                                  */
 376                                 if (invited)
 377                                 {
 378                                         user->RemoveInvite(Ptr->name.c_str());
 379                                 }
 380                         }
 381                 }
 382         }
 383
 384         if (created_by_local)
 385         {
 386                 /* As spotted by jilles, dont bother to set this on remote users */
 387                 Ptr->SetDefaultModes();
 388         }
 389
 390         return Channel::ForceChan(Instance, Ptr, user, privs, bursting, created_by_local);
 391 }
 392
 393 Channel* Channel::ForceChan(InspIRCd* Instance, Channel* Ptr, User* user, const std::string &privs, bool bursting, bool created)
 394 {
 395         std::string nick = user->nick;
 396         bool silent = false;
 397
 398         Ptr->AddUser(user);
 399
 400         /* Just in case they have no permissions */
 401         user->chans[Ptr] = 0;
 402
 403         for (std::string::const_iterator x = privs.begin(); x != privs.end(); x++)
 404         {
 405                 const char status = *x;
 406                 ModeHandler* mh = Instance->Modes->FindPrefix(status);
 407                 if (mh)
 408                 {
 409                         /* Set, and make sure that the mode handler knows this mode was now set */
 410                         Ptr->SetPrefix(user, status, mh->GetPrefixRank(), true);
 411                         mh->OnModeChange(Instance->FakeClient, Instance->FakeClient, Ptr, nick, true);
 412
 413                         switch (mh->GetPrefix())
 414                         {
 415                                 /* These logic ops are SAFE IN THIS CASE because if the entry doesnt exist,
 416                                  * addressing operator[] creates it. If they do exist, it points to it.
 417                                  * At all other times where we dont want to create an item if it doesnt exist, we
 418                                  * must stick to ::find().
 419                                  */
 420                                 case '@':
 421                                         user->chans[Ptr] |= UCMODE_OP;
 422                                 break;
 423                                 case '%':
 424                                         user->chans[Ptr] |= UCMODE_HOP;
 425                                 break;
 426                                 case '+':
 427                                         user->chans[Ptr] |= UCMODE_VOICE;
 428                                 break;
 429                         }
 430                 }
 431         }
 432
 433         FOREACH_MOD_I(Instance,I_OnUserJoin,OnUserJoin(user, Ptr, bursting, silent, created));
 434
 435         if (!silent)
 436                 Ptr->WriteChannel(user,"JOIN :%s",Ptr->name.c_str());
 437
 438         /* Theyre not the first ones in here, make sure everyone else sees the modes we gave the user */
 439         std::string ms = Instance->Modes->ModeString(user, Ptr);
 440         if ((Ptr->GetUserCounter() > 1) && (ms.length()))
 441                 Ptr->WriteAllExceptSender(user, true, 0, "MODE %s +%s", Ptr->name.c_str(), ms.c_str());
 442
 443         /* Major improvement by Brain - we dont need to be calculating all this pointlessly for remote users */
 444         if (IS_LOCAL(user))
 445         {
 446                 if (Ptr->topicset)
 447                 {
 448                         user->WriteNumeric(RPL_TOPIC, "%s %s :%s", user->nick.c_str(), Ptr->name.c_str(), Ptr->topic.c_str());
 449                         user->WriteNumeric(RPL_TOPICTIME, "%s %s %s %lu", user->nick.c_str(), Ptr->name.c_str(), Ptr->setby.c_str(), (unsigned long)Ptr->topicset);
 450                 }
 451                 Ptr->UserList(user);
 452         }
 453         FOREACH_MOD_I(Instance,I_OnPostJoin,OnPostJoin(user, Ptr));
 454         return Ptr;
 455 }
 456
 457 bool Channel::IsBanned(User* user)
 458 {
 459         ModResult result;
 460         DO_EACH_HOOK(ServerInstance, OnCheckBan, ModResult modresult, (user, this))
 461         {
 462                 result = result + modresult;
 463         }
 464         WHILE_EACH_HOOK(ServerInstance, OnCheckBan);
 465
 466         if (result != MOD_RES_PASSTHRU)
 467                 return (result == MOD_RES_DENY);
 468
 469         char mask[MAXBUF];
 470         snprintf(mask, MAXBUF, "%s!%s@%s", user->nick.c_str(), user->ident.c_str(), user->GetIPString());
 471         for (BanList::iterator i = this->bans.begin(); i != this->bans.end(); i++)
 472         {
 473                 if ((InspIRCd::Match(user->GetFullHost(),i->data, NULL)) || // host
 474                         (InspIRCd::Match(user->GetFullRealHost(),i->data, NULL)) || // uncloaked host
 475                         (InspIRCd::MatchCIDR(mask, i->data, NULL))) // ip
 476                 {
 477                         return true;
 478                 }
 479         }
 480         return false;
 481 }
 482
 483 ModResult Channel::GetExtBanStatus(const std::string &str, char type)
 484 {
 485         ModResult result;
 486         DO_EACH_HOOK(ServerInstance, OnCheckStringExtBan, ModResult modresult, (str, this, type))
 487         {
 488                 result = result + modresult;
 489         }
 490         WHILE_EACH_HOOK(ServerInstance, OnCheckStringExtBan);
 491
 492         if (result != MOD_RES_PASSTHRU)
 493                 return result;
 494
 495         // nobody decided for us, check the ban list
 496         for (BanList::iterator i = this->bans.begin(); i != this->bans.end(); i++)
 497         {
 498                 if (i->data[0] != type || i->data[1] != ':')
 499                         continue;
 500
 501                 std::string maskptr = i->data.substr(2);
 502                 ServerInstance->Logs->Log("EXTBANS", DEBUG, "Checking %s against %s, type is %c", str.c_str(), maskptr.c_str(), type);
 503
 504                 if (InspIRCd::Match(str, maskptr, NULL))
 505                         return MOD_RES_DENY;
 506         }
 507
 508         return MOD_RES_PASSTHRU;
 509 }
 510
 511 ModResult Channel::GetExtBanStatus(User *user, char type)
 512 {
 513         ModResult rv;
 514         DO_EACH_HOOK(ServerInstance, OnCheckExtBan, ModResult modresult, (user, this, type))
 515         {
 516                 rv = rv + modresult;
 517         }
 518         WHILE_EACH_HOOK(ServerInstance, OnCheckExtBan);
 519
 520         if (rv != MOD_RES_PASSTHRU)
 521                 return rv;
 522
 523         char mask[MAXBUF];
 524         snprintf(mask, MAXBUF, "%s!%s@%s", user->nick.c_str(), user->ident.c_str(), user->GetIPString());
 525
 526         rv = rv + this->GetExtBanStatus(mask, type);
 527         rv = rv + this->GetExtBanStatus(user->GetFullHost(), type);
 528         rv = rv + this->GetExtBanStatus(user->GetFullRealHost(), type);
 529         return rv;
 530 }
 531
 532 /* Channel::PartUser
 533  * remove a channel from a users record, and return the number of users left.
 534  * Therefore, if this function returns 0 the caller should delete the Channel.
 535  */
 536 long Channel::PartUser(User *user, std::string &reason)
 537 {
 538         bool silent = false;
 539
 540         if (!user)
 541                 return this->GetUserCounter();
 542
 543         UCListIter i = user->chans.find(this);
 544         if (i != user->chans.end())
 545         {
 546                 FOREACH_MOD(I_OnUserPart,OnUserPart(user, this, reason, silent));
 547
 548                 if (!silent)
 549                         this->WriteChannel(user, "PART %s%s%s", this->name.c_str(), reason.empty() ? "" : " :", reason.c_str());
 550
 551                 user->chans.erase(i);
 552                 this->RemoveAllPrefixes(user);
 553         }
 554
 555         if (!this->DelUser(user)) /* if there are no users left on the channel... */
 556         {
 557                 chan_hash::iterator iter = ServerInstance->chanlist->find(this->name);
 558                 /* kill the record */
 559                 if (iter != ServerInstance->chanlist->end())
 560                 {
 561                         ModResult res;
 562                         FIRST_MOD_RESULT(ServerInstance, OnChannelPreDelete, res, (this));
 563                         if (res == MOD_RES_DENY)
 564                                 return 1; // delete halted by module
 565                         FOREACH_MOD(I_OnChannelDelete, OnChannelDelete(this));
 566                         ServerInstance->chanlist->erase(iter);
 567                 }
 568                 return 0;
 569         }
 570
 571         return this->GetUserCounter();
 572 }
 573
 574 long Channel::ServerKickUser(User* user, const char* reason, const char* servername)
 575 {
 576         if (servername == NULL || *ServerInstance->Config->HideWhoisServer)
 577                 servername = ServerInstance->Config->ServerName;
 578
 579         ServerInstance->FakeClient->server = servername;
 580         return this->KickUser(ServerInstance->FakeClient, user, reason);
 581 }
 582
 583 long Channel::KickUser(User *src, User *user, const char* reason)
 584 {
 585         bool silent = false;
 586
 587         if (!src || !user || !reason)
 588                 return this->GetUserCounter();
 589
 590         if (IS_LOCAL(src))
 591         {
 592                 if (!this->HasUser(user))
 593                 {
 594                         src->WriteNumeric(ERR_USERNOTINCHANNEL, "%s %s %s :They are not on that channel",src->nick.c_str(), user->nick.c_str(), this->name.c_str());
 595                         return this->GetUserCounter();
 596                 }
 597                 if ((ServerInstance->ULine(user->server)) && (!ServerInstance->ULine(src->server)))
 598                 {
 599                         src->WriteNumeric(ERR_CHANOPRIVSNEEDED, "%s %s :Only a u-line may kick a u-line from a channel.",src->nick.c_str(), this->name.c_str());
 600                         return this->GetUserCounter();
 601                 }
 602
 603                 ModResult res;
 604                 if (ServerInstance->ULine(src->server))
 605                         res = MOD_RES_ALLOW;
 606                 if (res == MOD_RES_PASSTHRU)
 607                         FIRST_MOD_RESULT(ServerInstance, OnUserPreKick, res, (src,user,this,reason));
 608                 if (res == MOD_RES_PASSTHRU)
 609                         FIRST_MOD_RESULT(ServerInstance, OnAccessCheck, res, (src,user,this,AC_KICK));
 610
 611                 if (res == MOD_RES_DENY)
 612                         return this->GetUserCounter();
 613
 614                 if (res == MOD_RES_PASSTHRU)
 615                 {
 616                         int them = this->GetStatus(src);
 617                         int us = this->GetStatus(user);
 618                         if ((them < STATUS_HOP) || (them < us))
 619                         {
 620                                 src->WriteNumeric(ERR_CHANOPRIVSNEEDED, "%s %s :You must be a channel %soperator",src->nick.c_str(), this->name.c_str(), them == STATUS_HOP ? "" : "half-");
 621                                 return this->GetUserCounter();
 622                         }
 623                 }
 624         }
 625
 626         FOREACH_MOD(I_OnUserKick,OnUserKick(src, user, this, reason, silent));
 627
 628         UCListIter i = user->chans.find(this);
 629         if (i != user->chans.end())
 630         {
 631                 /* zap it from the channel list of the user */
 632                 if (!silent)
 633                         this->WriteChannel(src, "KICK %s %s :%s", this->name.c_str(), user->nick.c_str(), reason);
 634
 635                 user->chans.erase(i);
 636                 this->RemoveAllPrefixes(user);
 637         }
 638
 639         if (!this->DelUser(user))
 640         /* if there are no users left on the channel */
 641         {
 642                 chan_hash::iterator iter = ServerInstance->chanlist->find(this->name.c_str());
 643
 644                 /* kill the record */
 645                 if (iter != ServerInstance->chanlist->end())
 646                 {
 647                         ModResult res;
 648                         FIRST_MOD_RESULT(ServerInstance, OnChannelPreDelete, res, (this));
 649                         if (res == MOD_RES_DENY)
 650                                 return 1; // delete halted by module
 651                         FOREACH_MOD(I_OnChannelDelete, OnChannelDelete(this));
 652                         ServerInstance->chanlist->erase(iter);
 653                 }
 654                 return 0;
 655         }
 656
 657         return this->GetUserCounter();
 658 }
 659
 660 void Channel::WriteChannel(User* user, const char* text, ...)
 661 {
 662         char textbuffer[MAXBUF];
 663         va_list argsPtr;
 664
 665         if (!user || !text)
 666                 return;
 667
 668         va_start(argsPtr, text);
 669         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 670         va_end(argsPtr);
 671
 672         this->WriteChannel(user, std::string(textbuffer));
 673 }
 674
 675 void Channel::WriteChannel(User* user, const std::string &text)
 676 {
 677         CUList *ulist = this->GetUsers();
 678         char tb[MAXBUF];
 679
 680         if (!user)
 681                 return;
 682
 683         snprintf(tb,MAXBUF,":%s %s", user->GetFullHost().c_str(), text.c_str());
 684         std::string out = tb;
 685
 686         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
 687         {
 688                 if (IS_LOCAL(i->first))
 689                         i->first->Write(out);
 690         }
 691 }
 692
 693 void Channel::WriteChannelWithServ(const char* ServName, const char* text, ...)
 694 {
 695         char textbuffer[MAXBUF];
 696         va_list argsPtr;
 697
 698         if (!text)
 699                 return;
 700
 701         va_start(argsPtr, text);
 702         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 703         va_end(argsPtr);
 704
 705         this->WriteChannelWithServ(ServName, std::string(textbuffer));
 706 }
 707
 708 void Channel::WriteChannelWithServ(const char* ServName, const std::string &text)
 709 {
 710         CUList *ulist = this->GetUsers();
 711         char tb[MAXBUF];
 712
 713         snprintf(tb,MAXBUF,":%s %s", ServName ? ServName : ServerInstance->Config->ServerName, text.c_str());
 714         std::string out = tb;
 715
 716         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
 717         {
 718                 if (IS_LOCAL(i->first))
 719                         i->first->Write(out);
 720         }
 721 }
 722
 723 /* write formatted text from a source user to all users on a channel except
 724  * for the sender (for privmsg etc) */
 725 void Channel::WriteAllExceptSender(User* user, bool serversource, char status, const char* text, ...)
 726 {
 727         char textbuffer[MAXBUF];
 728         va_list argsPtr;
 729
 730         if (!text)
 731                 return;
 732
 733         va_start(argsPtr, text);
 734         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 735         va_end(argsPtr);
 736
 737         this->WriteAllExceptSender(user, serversource, status, std::string(textbuffer));
 738 }
 739
 740 void Channel::WriteAllExcept(User* user, bool serversource, char status, CUList &except_list, const char* text, ...)
 741 {
 742         char textbuffer[MAXBUF];
 743         va_list argsPtr;
 744
 745         if (!text)
 746                 return;
 747
 748         int offset = snprintf(textbuffer,MAXBUF,":%s ", user->GetFullHost().c_str());
 749
 750         va_start(argsPtr, text);
 751         vsnprintf(textbuffer + offset, MAXBUF - offset, text, argsPtr);
 752         va_end(argsPtr);
 753
 754         this->RawWriteAllExcept(user, serversource, status, except_list, std::string(textbuffer));
 755 }
 756
 757 void Channel::WriteAllExcept(User* user, bool serversource, char status, CUList &except_list, const std::string &text)
 758 {
 759         char tb[MAXBUF];
 760
 761         snprintf(tb,MAXBUF,":%s %s", serversource ? ServerInstance->Config->ServerName : user->GetFullHost().c_str(), text.c_str());
 762         std::string out = tb;
 763
 764         this->RawWriteAllExcept(user, serversource, status, except_list, std::string(tb));
 765 }
 766
 767 void Channel::RawWriteAllExcept(User* user, bool serversource, char status, CUList &except_list, const std::string &out)
 768 {
 769         CUList *ulist = this->GetUsers();
 770         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
 771         {
 772                 if ((IS_LOCAL(i->first)) && (except_list.find(i->first) == except_list.end()))
 773                 {
 774                         /* User doesnt have the status we're after */
 775                         if (status && !strchr(this->GetAllPrefixChars(i->first), status))
 776                                 continue;
 777
 778                         i->first->Write(out);
 779                 }
 780         }
 781 }
 782
 783 void Channel::WriteAllExceptSender(User* user, bool serversource, char status, const std::string& text)
 784 {
 785         CUList except_list;
 786         except_list[user] = user->nick;
 787         this->WriteAllExcept(user, serversource, status, except_list, std::string(text));
 788 }
 789
 790 /*
 791  * return a count of the users on a specific channel accounting for
 792  * invisible users who won't increase the count. e.g. for /LIST
 793  */
 794 int Channel::CountInvisible()
 795 {
 796         int count = 0;
 797         CUList *ulist= this->GetUsers();
 798         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
 799         {
 800                 if (!(i->first->IsModeSet('i')))
 801                         count++;
 802         }
 803
 804         return count;
 805 }
 806
 807 char* Channel::ChanModes(bool showkey)
 808 {
 809         static char scratch[MAXBUF];
 810         static char sparam[MAXBUF];
 811         char* offset = scratch;
 812         std::string extparam;
 813
 814         *scratch = '\0';
 815         *sparam = '\0';
 816
 817         /* This was still iterating up to 190, Channel::modes is only 64 elements -- Om */
 818         for(int n = 0; n < 64; n++)
 819         {
 820                 if(this->modes[n])
 821                 {
 822                         *offset++ = n + 65;
 823                         extparam.clear();
 824                         switch (n)
 825                         {
 826                                 case CM_KEY:
 827                                         // Unfortunately this must be special-cased, as we definitely don't want to always display key.
 828                                         if (showkey)
 829                                         {
 830                                                 extparam = this->GetModeParameter('k');
 831                                         }
 832                                         else
 833                                         {
 834                                                 extparam = "<key>";
 835                                         }
 836                                         break;
 837                                 case CM_NOEXTERNAL:
 838                                 case CM_TOPICLOCK:
 839                                 case CM_INVITEONLY:
 840                                 case CM_MODERATED:
 841                                 case CM_SECRET:
 842                                 case CM_PRIVATE:
 843                                         /* We know these have no parameters */
 844                                 break;
 845                                 default:
 846                                         extparam = this->GetModeParameter(n + 65);
 847                                 break;
 848                         }
 849                         if (!extparam.empty())
 850                         {
 851                                 charlcat(sparam,' ',MAXBUF);
 852                                 strlcat(sparam,extparam.c_str(),MAXBUF);
 853                         }
 854                 }
 855         }
 856
 857         /* Null terminate scratch */
 858         *offset = '\0';
 859         strlcat(scratch,sparam,MAXBUF);
 860         return scratch;
 861 }
 862
 863 /* compile a userlist of a channel into a string, each nick seperated by
 864  * spaces and op, voice etc status shown as @ and +, and send it to 'user'
 865  */
 866 void Channel::UserList(User *user, CUList *ulist)
 867 {
 868         char list[MAXBUF];
 869         size_t dlen, curlen;
 870         ModResult call_modules;
 871
 872         if (!IS_LOCAL(user))
 873                 return;
 874
 875         FIRST_MOD_RESULT(ServerInstance, OnUserList, call_modules, (user, this, ulist));
 876
 877         if (call_modules != MOD_RES_ALLOW)
 878         {
 879                 if ((this->IsModeSet('s')) && (!this->HasUser(user)))
 880                 {
 881                         user->WriteNumeric(ERR_NOSUCHNICK, "%s %s :No such nick/channel",user->nick.c_str(), this->name.c_str());
 882                         return;
 883                 }
 884         }
 885
 886         dlen = curlen = snprintf(list,MAXBUF,"%s %c %s :", user->nick.c_str(), this->IsModeSet('s') ? '@' : this->IsModeSet('p') ? '*' : '=',  this->name.c_str());
 887
 888         int numusers = 0;
 889         char* ptr = list + dlen;
 890
 891         if (!ulist)
 892                 ulist = this->GetUsers();
 893
 894         /* Improvement by Brain - this doesnt change in value, so why was it inside
 895          * the loop?
 896          */
 897         bool has_user = this->HasUser(user);
 898
 899         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
 900         {
 901                 if ((!has_user) && (i->first->IsModeSet('i')))
 902                 {
 903                         /*
 904                          * user is +i, and source not on the channel, does not show
 905                          * nick in NAMES list
 906                          */
 907                         continue;
 908                 }
 909
 910                 std::string prefixlist = this->GetPrefixChar(i->first);
 911                 std::string nick = i->first->nick;
 912
 913                 if (call_modules != MOD_RES_DENY)
 914                 {
 915                         FOREACH_MOD(I_OnNamesListItem, OnNamesListItem(user, i->first, this, prefixlist, nick));
 916
 917                         /* Nick was nuked, a module wants us to skip it */
 918                         if (nick.empty())
 919                                 continue;
 920                 }
 921
 922                 size_t ptrlen = 0;
 923
 924                 if (curlen + prefixlist.length() + nick.length() + 1 > 480)
 925                 {
 926                         /* list overflowed into multiple numerics */
 927                         user->WriteNumeric(RPL_NAMREPLY, std::string(list));
 928
 929                         /* reset our lengths */
 930                         dlen = curlen = snprintf(list,MAXBUF,"%s %c %s :", user->nick.c_str(), this->IsModeSet('s') ? '@' : this->IsModeSet('p') ? '*' : '=', this->name.c_str());
 931                         ptr = list + dlen;
 932
 933                         ptrlen = 0;
 934                         numusers = 0;
 935                 }
 936
 937                 ptrlen = snprintf(ptr, MAXBUF, "%s%s ", prefixlist.c_str(), nick.c_str());
 938
 939                 curlen += ptrlen;
 940                 ptr += ptrlen;
 941
 942                 numusers++;
 943         }
 944
 945         /* if whats left in the list isnt empty, send it */
 946         if (numusers)
 947         {
 948                 user->WriteNumeric(RPL_NAMREPLY, std::string(list));
 949         }
 950
 951         user->WriteNumeric(RPL_ENDOFNAMES, "%s %s :End of /NAMES list.", user->nick.c_str(), this->name.c_str());
 952 }
 953
 954 long Channel::GetMaxBans()
 955 {
 956         /* Return the cached value if there is one */
 957         if (this->maxbans)
 958                 return this->maxbans;
 959
 960         /* If there isnt one, we have to do some O(n) hax to find it the first time. (ick) */
 961         for (std::map<std::string,int>::iterator n = ServerInstance->Config->maxbans.begin(); n != ServerInstance->Config->maxbans.end(); n++)
 962         {
 963                 if (InspIRCd::Match(this->name, n->first, NULL))
 964                 {
 965                         this->maxbans = n->second;
 966                         return n->second;
 967                 }
 968         }
 969
 970         /* Screw it, just return the default of 64 */
 971         this->maxbans = 64;
 972         return this->maxbans;
 973 }
 974
 975 void Channel::ResetMaxBans()
 976 {
 977         this->maxbans = 0;
 978 }
 979
 980 /* returns the status character for a given user on a channel, e.g. @ for op,
 981  * % for halfop etc. If the user has several modes set, the highest mode
 982  * the user has must be returned.
 983  */
 984 const char* Channel::GetPrefixChar(User *user)
 985 {
 986         static char pf[2] = {0, 0};
 987
 988         prefixlist::iterator n = prefixes.find(user);
 989         if (n != prefixes.end())
 990         {
 991                 if (n->second.size())
 992                 {
 993                         /* If the user has any prefixes, their highest prefix
 994                          * will always be at the head of the list, as the list is
 995                          * sorted in rank order highest first (see SetPrefix()
 996                          * for reasons why)
 997                          */
 998                         *pf = n->second.begin()->first;
 999                         return pf;
1000                 }
1001         }
1002
1003         *pf = 0;
1004         return pf;
1005 }
1006
1007
1008 const char* Channel::GetAllPrefixChars(User* user)
1009 {
1010         static char prefix[MAXBUF];
1011         int ctr = 0;
1012         *prefix = 0;
1013
1014         prefixlist::iterator n = prefixes.find(user);
1015         if (n != prefixes.end())
1016         {
1017                 for (std::vector<prefixtype>::iterator x = n->second.begin(); x != n->second.end(); x++)
1018                 {
1019                         prefix[ctr++] = x->first;
1020                 }
1021         }
1022
1023         prefix[ctr] = 0;
1024
1025         return prefix;
1026 }
1027
1028 unsigned int Channel::GetPrefixValue(User* user)
1029 {
1030         prefixlist::iterator n = prefixes.find(user);
1031         if (n != prefixes.end())
1032         {
1033                 if (n->second.size())
1034                         return n->second.begin()->second;
1035         }
1036         return 0;
1037 }
1038
1039 int Channel::GetStatusFlags(User *user)
1040 {
1041         UCListIter i = user->chans.find(this);
1042         if (i != user->chans.end())
1043         {
1044                 return i->second;
1045         }
1046         return 0;
1047 }
1048
1049 int Channel::GetStatus(User *user)
1050 {
1051         if (ServerInstance->ULine(user->server))
1052                 return STATUS_OP;
1053
1054         UCListIter i = user->chans.find(this);
1055         if (i != user->chans.end())
1056         {
1057                 if ((i->second & UCMODE_OP) > 0)
1058                 {
1059                         return STATUS_OP;
1060                 }
1061                 if ((i->second & UCMODE_HOP) > 0)
1062                 {
1063                         return STATUS_HOP;
1064                 }
1065                 if ((i->second & UCMODE_VOICE) > 0)
1066                 {
1067                         return STATUS_VOICE;
1068                 }
1069                 return STATUS_NORMAL;
1070         }
1071         return STATUS_NORMAL;
1072 }
1073
1074 void Channel::SetPrefix(User* user, char prefix, unsigned int prefix_value, bool adding)
1075 {
1076         prefixlist::iterator n = prefixes.find(user);
1077         prefixtype pfx = std::make_pair(prefix,prefix_value);
1078         if (adding)
1079         {
1080                 if (n != prefixes.end())
1081                 {
1082                         if (std::find(n->second.begin(), n->second.end(), pfx) == n->second.end())
1083                         {
1084                                 n->second.push_back(pfx);
1085                                 /* We must keep prefixes in rank order, largest first.
1086                                  * This is for two reasons, firstly because x-chat *ass-u-me's* this
1087                                  * state, and secondly it turns out to be a benefit to us later.
1088                                  * See above in GetPrefix().
1089                                  */
1090                                 std::sort(n->second.begin(), n->second.end(), ModeParser::PrefixComparison);
1091                         }
1092                 }
1093                 else
1094                 {
1095                         pfxcontainer one;
1096                         one.push_back(pfx);
1097                         prefixes.insert(std::make_pair<User*,pfxcontainer>(user, one));
1098                 }
1099         }
1100         else
1101         {
1102                 if (n != prefixes.end())
1103                 {
1104                         pfxcontainer::iterator x = std::find(n->second.begin(), n->second.end(), pfx);
1105                         if (x != n->second.end())
1106                                 n->second.erase(x);
1107                 }
1108         }
1109 }
1110
1111 void Channel::RemoveAllPrefixes(User* user)
1112 {
1113         prefixlist::iterator n = prefixes.find(user);
1114         if (n != prefixes.end())
1115         {
1116                 prefixes.erase(n);
1117         }
1118 }