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