src/users.cpp

   1 /*
   2  * InspIRCd -- Internet Relay Chat Daemon
   3  *
   4  *   Copyright (C) 2009-2010 Daniel De Graaf <danieldg@inspircd.org>
   5  *   Copyright (C) 2006-2009 Robin Burchell <robin+git@viroteck.net>
   6  *   Copyright (C) 2006-2007, 2009 Dennis Friis <peavey@inspircd.org>
   7  *   Copyright (C) 2008 John Brooks <john.brooks@dereferenced.net>
   8  *   Copyright (C) 2008 Thomas Stagner <aquanight@inspircd.org>
   9  *   Copyright (C) 2008 Oliver Lupton <oliverlupton@gmail.com>
  10  *   Copyright (C) 2003-2008 Craig Edwards <craigedwards@brainbox.cc>
  11  *
  12  * This file is part of InspIRCd.  InspIRCd is free software: you can
  13  * redistribute it and/or modify it under the terms of the GNU General Public
  14  * License as published by the Free Software Foundation, version 2.
  15  *
  16  * This program is distributed in the hope that it will be useful, but WITHOUT
  17  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  18  * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
  19  * details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  23  */
  24
  25
  26 #include "inspircd.h"
  27 #include "xline.h"
  28
  29 already_sent_t LocalUser::already_sent_id = 0;
  30
  31 bool User::IsNoticeMaskSet(unsigned char sm)
  32 {
  33         if (!isalpha(sm))
  34                 return false;
  35         return (snomasks[sm-65]);
  36 }
  37
  38 bool User::IsModeSet(unsigned char m)
  39 {
  40         ModeHandler* mh = ServerInstance->Modes->FindMode(m, MODETYPE_USER);
  41         return (mh && modes[mh->GetId()]);
  42 }
  43
  44 const char* User::FormatModes(bool showparameters)
  45 {
  46         static std::string data;
  47         std::string params;
  48         data.clear();
  49
  50         for (unsigned char n = 0; n < 64; n++)
  51         {
  52                 ModeHandler* mh = ServerInstance->Modes->FindMode(n + 65, MODETYPE_USER);
  53                 if (mh && IsModeSet(mh))
  54                 {
  55                         data.push_back(n + 65);
  56                         if (showparameters && mh->GetNumParams(true))
  57                         {
  58                                 std::string p = mh->GetUserParameter(this);
  59                                 if (p.length())
  60                                         params.append(" ").append(p);
  61                         }
  62                 }
  63         }
  64         data += params;
  65         return data.c_str();
  66 }
  67
  68 User::User(const std::string& uid, Server* srv, int type)
  69         : uuid(uid), server(srv), usertype(type)
  70 {
  71         age = ServerInstance->Time();
  72         signon = 0;
  73         registered = 0;
  74         quitting = false;
  75         client_sa.sa.sa_family = AF_UNSPEC;
  76
  77         ServerInstance->Logs->Log("USERS", LOG_DEBUG, "New UUID for user: %s", uuid.c_str());
  78
  79         if (!ServerInstance->Users->uuidlist.insert(std::make_pair(uuid, this)).second)
  80                 throw CoreException("Duplicate UUID "+std::string(uuid)+" in User constructor");
  81 }
  82
  83 LocalUser::LocalUser(int myfd, irc::sockets::sockaddrs* client, irc::sockets::sockaddrs* servaddr)
  84         : User(ServerInstance->UIDGen.GetUID(), ServerInstance->FakeClient->server, USERTYPE_LOCAL), eh(this),
  85         bytes_in(0), bytes_out(0), cmds_in(0), cmds_out(0), nping(0), CommandFloodPenalty(0),
  86         already_sent(0)
  87 {
  88         exempt = quitting_sendq = false;
  89         idle_lastmsg = 0;
  90         ident = "unknown";
  91         lastping = 0;
  92         eh.SetFd(myfd);
  93         memcpy(&client_sa, client, sizeof(irc::sockets::sockaddrs));
  94         memcpy(&server_sa, servaddr, sizeof(irc::sockets::sockaddrs));
  95         dhost = host = GetIPString();
  96 }
  97
  98 User::~User()
  99 {
 100 }
 101
 102 const std::string& User::MakeHost()
 103 {
 104         if (!this->cached_makehost.empty())
 105                 return this->cached_makehost;
 106
 107         // XXX: Is there really a need to cache this?
 108         this->cached_makehost = ident + "@" + host;
 109         return this->cached_makehost;
 110 }
 111
 112 const std::string& User::MakeHostIP()
 113 {
 114         if (!this->cached_hostip.empty())
 115                 return this->cached_hostip;
 116
 117         // XXX: Is there really a need to cache this?
 118         this->cached_hostip = ident + "@" + this->GetIPString();
 119         return this->cached_hostip;
 120 }
 121
 122 const std::string& User::GetFullHost()
 123 {
 124         if (!this->cached_fullhost.empty())
 125                 return this->cached_fullhost;
 126
 127         // XXX: Is there really a need to cache this?
 128         this->cached_fullhost = nick + "!" + ident + "@" + dhost;
 129         return this->cached_fullhost;
 130 }
 131
 132 const std::string& User::GetFullRealHost()
 133 {
 134         if (!this->cached_fullrealhost.empty())
 135                 return this->cached_fullrealhost;
 136
 137         // XXX: Is there really a need to cache this?
 138         this->cached_fullrealhost = nick + "!" + ident + "@" + host;
 139         return this->cached_fullrealhost;
 140 }
 141
 142 bool User::HasModePermission(unsigned char, ModeType)
 143 {
 144         return true;
 145 }
 146
 147 bool LocalUser::HasModePermission(unsigned char mode, ModeType type)
 148 {
 149         if (!this->IsOper())
 150                 return false;
 151
 152         if (mode < 'A' || mode > ('A' + 64)) return false;
 153
 154         return ((type == MODETYPE_USER ? oper->AllowedUserModes : oper->AllowedChanModes))[(mode - 'A')];
 155
 156 }
 157 /*
 158  * users on remote servers can completely bypass all permissions based checks.
 159  * This prevents desyncs when one server has different type/class tags to another.
 160  * That having been said, this does open things up to the possibility of source changes
 161  * allowing remote kills, etc - but if they have access to the src, they most likely have
 162  * access to the conf - so it's an end to a means either way.
 163  */
 164 bool User::HasPermission(const std::string&)
 165 {
 166         return true;
 167 }
 168
 169 bool LocalUser::HasPermission(const std::string &command)
 170 {
 171         // are they even an oper at all?
 172         if (!this->IsOper())
 173         {
 174                 return false;
 175         }
 176
 177         if (oper->AllowedOperCommands.find(command) != oper->AllowedOperCommands.end())
 178                 return true;
 179         else if (oper->AllowedOperCommands.find("*") != oper->AllowedOperCommands.end())
 180                 return true;
 181
 182         return false;
 183 }
 184
 185 bool User::HasPrivPermission(const std::string &privstr, bool noisy)
 186 {
 187         return true;
 188 }
 189
 190 bool LocalUser::HasPrivPermission(const std::string &privstr, bool noisy)
 191 {
 192         if (!this->IsOper())
 193         {
 194                 if (noisy)
 195                         this->WriteNotice("You are not an oper");
 196                 return false;
 197         }
 198
 199         if (oper->AllowedPrivs.find(privstr) != oper->AllowedPrivs.end())
 200         {
 201                 return true;
 202         }
 203         else if (oper->AllowedPrivs.find("*") != oper->AllowedPrivs.end())
 204         {
 205                 return true;
 206         }
 207
 208         if (noisy)
 209                 this->WriteNotice("Oper type " + oper->name + " does not have access to priv " + privstr);
 210
 211         return false;
 212 }
 213
 214 void UserIOHandler::OnDataReady()
 215 {
 216         if (user->quitting)
 217                 return;
 218
 219         if (recvq.length() > user->MyClass->GetRecvqMax() && !user->HasPrivPermission("users/flood/increased-buffers"))
 220         {
 221                 ServerInstance->Users->QuitUser(user, "RecvQ exceeded");
 222                 ServerInstance->SNO->WriteToSnoMask('a', "User %s RecvQ of %lu exceeds connect class maximum of %lu",
 223                         user->nick.c_str(), (unsigned long)recvq.length(), user->MyClass->GetRecvqMax());
 224                 return;
 225         }
 226         unsigned long sendqmax = ULONG_MAX;
 227         if (!user->HasPrivPermission("users/flood/increased-buffers"))
 228                 sendqmax = user->MyClass->GetSendqSoftMax();
 229         unsigned long penaltymax = ULONG_MAX;
 230         if (!user->HasPrivPermission("users/flood/no-fakelag"))
 231                 penaltymax = user->MyClass->GetPenaltyThreshold() * 1000;
 232
 233         while (user->CommandFloodPenalty < penaltymax && getSendQSize() < sendqmax)
 234         {
 235                 std::string line;
 236                 line.reserve(ServerInstance->Config->Limits.MaxLine);
 237                 std::string::size_type qpos = 0;
 238                 while (qpos < recvq.length())
 239                 {
 240                         char c = recvq[qpos++];
 241                         switch (c)
 242                         {
 243                         case '\0':
 244                                 c = ' ';
 245                                 break;
 246                         case '\r':
 247                                 continue;
 248                         case '\n':
 249                                 goto eol_found;
 250                         }
 251                         if (line.length() < ServerInstance->Config->Limits.MaxLine - 2)
 252                                 line.push_back(c);
 253                 }
 254                 // if we got here, the recvq ran out before we found a newline
 255                 return;
 256 eol_found:
 257                 // just found a newline. Terminate the string, and pull it out of recvq
 258                 recvq.erase(0, qpos);
 259
 260                 // TODO should this be moved to when it was inserted in recvq?
 261                 ServerInstance->stats.Recv += qpos;
 262                 user->bytes_in += qpos;
 263                 user->cmds_in++;
 264
 265                 ServerInstance->Parser.ProcessBuffer(line, user);
 266                 if (user->quitting)
 267                         return;
 268         }
 269         if (user->CommandFloodPenalty >= penaltymax && !user->MyClass->fakelag)
 270                 ServerInstance->Users->QuitUser(user, "Excess Flood");
 271 }
 272
 273 void UserIOHandler::AddWriteBuf(const std::string &data)
 274 {
 275         if (user->quitting_sendq)
 276                 return;
 277         if (!user->quitting && getSendQSize() + data.length() > user->MyClass->GetSendqHardMax() &&
 278                 !user->HasPrivPermission("users/flood/increased-buffers"))
 279         {
 280                 user->quitting_sendq = true;
 281                 ServerInstance->GlobalCulls.AddSQItem(user);
 282                 return;
 283         }
 284
 285         // We still want to append data to the sendq of a quitting user,
 286         // e.g. their ERROR message that says 'closing link'
 287
 288         WriteData(data);
 289 }
 290
 291 void UserIOHandler::OnError(BufferedSocketError)
 292 {
 293         ServerInstance->Users->QuitUser(user, getError());
 294 }
 295
 296 CullResult User::cull()
 297 {
 298         if (!quitting)
 299                 ServerInstance->Users->QuitUser(this, "Culled without QuitUser");
 300
 301         if (client_sa.sa.sa_family != AF_UNSPEC)
 302                 ServerInstance->Users->RemoveCloneCounts(this);
 303
 304         return Extensible::cull();
 305 }
 306
 307 CullResult LocalUser::cull()
 308 {
 309         eh.cull();
 310         return User::cull();
 311 }
 312
 313 CullResult FakeUser::cull()
 314 {
 315         // Fake users don't quit, they just get culled.
 316         quitting = true;
 317         // Fake users are not inserted into UserManager::clientlist, they're only in the uuidlist
 318         // and they are removed from there by the linking mod when the server splits
 319         return User::cull();
 320 }
 321
 322 void User::Oper(OperInfo* info)
 323 {
 324         ModeHandler* opermh = ServerInstance->Modes->FindMode('o', MODETYPE_USER);
 325         if (this->IsModeSet(opermh))
 326                 this->UnOper();
 327
 328         this->SetMode(opermh, true);
 329         this->oper = info;
 330         this->WriteCommand("MODE", "+o");
 331         FOREACH_MOD(OnOper, (this, info->name));
 332
 333         std::string opername;
 334         if (info->oper_block)
 335                 opername = info->oper_block->getString("name");
 336
 337         if (IS_LOCAL(this))
 338         {
 339                 LocalUser* l = IS_LOCAL(this);
 340                 std::string vhost = oper->getConfig("vhost");
 341                 if (!vhost.empty())
 342                         l->ChangeDisplayedHost(vhost.c_str());
 343                 std::string opClass = oper->getConfig("class");
 344                 if (!opClass.empty())
 345                         l->SetClass(opClass);
 346         }
 347
 348         ServerInstance->SNO->WriteToSnoMask('o',"%s (%s@%s) is now an IRC operator of type %s (using oper '%s')",
 349                 nick.c_str(), ident.c_str(), host.c_str(), oper->name.c_str(), opername.c_str());
 350         this->WriteNumeric(RPL_YOUAREOPER, ":You are now %s %s", strchr("aeiouAEIOU", oper->name[0]) ? "an" : "a", oper->name.c_str());
 351
 352         ServerInstance->Logs->Log("OPER", LOG_DEFAULT, "%s opered as type: %s", GetFullRealHost().c_str(), oper->name.c_str());
 353         ServerInstance->Users->all_opers.push_back(this);
 354
 355         // Expand permissions from config for faster lookup
 356         if (IS_LOCAL(this))
 357                 oper->init();
 358
 359         FOREACH_MOD(OnPostOper, (this, oper->name, opername));
 360 }
 361
 362 void OperInfo::init()
 363 {
 364         AllowedOperCommands.clear();
 365         AllowedPrivs.clear();
 366         AllowedUserModes.reset();
 367         AllowedChanModes.reset();
 368         AllowedUserModes['o' - 'A'] = true; // Call me paranoid if you want.
 369
 370         for(std::vector<reference<ConfigTag> >::iterator iter = class_blocks.begin(); iter != class_blocks.end(); ++iter)
 371         {
 372                 ConfigTag* tag = *iter;
 373                 std::string mycmd, mypriv;
 374                 /* Process commands */
 375                 irc::spacesepstream CommandList(tag->getString("commands"));
 376                 while (CommandList.GetToken(mycmd))
 377                 {
 378                         AllowedOperCommands.insert(mycmd);
 379                 }
 380
 381                 irc::spacesepstream PrivList(tag->getString("privs"));
 382                 while (PrivList.GetToken(mypriv))
 383                 {
 384                         AllowedPrivs.insert(mypriv);
 385                 }
 386
 387                 std::string modes = tag->getString("usermodes");
 388                 for (std::string::const_iterator c = modes.begin(); c != modes.end(); ++c)
 389                 {
 390                         if (*c == '*')
 391                         {
 392                                 this->AllowedUserModes.set();
 393                         }
 394                         else if (*c >= 'A' && *c <= 'z')
 395                         {
 396                                 this->AllowedUserModes[*c - 'A'] = true;
 397                         }
 398                 }
 399
 400                 modes = tag->getString("chanmodes");
 401                 for (std::string::const_iterator c = modes.begin(); c != modes.end(); ++c)
 402                 {
 403                         if (*c == '*')
 404                         {
 405                                 this->AllowedChanModes.set();
 406                         }
 407                         else if (*c >= 'A' && *c <= 'z')
 408                         {
 409                                 this->AllowedChanModes[*c - 'A'] = true;
 410                         }
 411                 }
 412         }
 413 }
 414
 415 void User::UnOper()
 416 {
 417         if (!this->IsOper())
 418                 return;
 419
 420         /*
 421          * unset their oper type (what IS_OPER checks).
 422          * note, order is important - this must come before modes as -o attempts
 423          * to call UnOper. -- w00t
 424          */
 425         oper = NULL;
 426
 427
 428         /* Remove all oper only modes from the user when the deoper - Bug #466*/
 429         Modes::ChangeList changelist;
 430         const ModeParser::ModeHandlerMap& usermodes = ServerInstance->Modes->GetModes(MODETYPE_USER);
 431         for (ModeParser::ModeHandlerMap::const_iterator i = usermodes.begin(); i != usermodes.end(); ++i)
 432         {
 433                 ModeHandler* mh = i->second;
 434                 if (mh->NeedsOper())
 435                         changelist.push_remove(mh);
 436         }
 437
 438         ServerInstance->Modes->Process(this, NULL, this, changelist);
 439
 440         // Remove the user from the oper list
 441         stdalgo::vector::swaperase(ServerInstance->Users->all_opers, this);
 442
 443         ModeHandler* opermh = ServerInstance->Modes->FindMode('o', MODETYPE_USER);
 444         this->SetMode(opermh, false);
 445 }
 446
 447 /*
 448  * Check class restrictions
 449  */
 450 void LocalUser::CheckClass(bool clone_count)
 451 {
 452         ConnectClass* a = this->MyClass;
 453
 454         if (!a)
 455         {
 456                 ServerInstance->Users->QuitUser(this, "Access denied by configuration");
 457                 return;
 458         }
 459         else if (a->type == CC_DENY)
 460         {
 461                 ServerInstance->Users->QuitUser(this, a->config->getString("reason", "Unauthorised connection"));
 462                 return;
 463         }
 464         else if (clone_count)
 465         {
 466                 const UserManager::CloneCounts& clonecounts = ServerInstance->Users->GetCloneCounts(this);
 467                 if ((a->GetMaxLocal()) && (clonecounts.local > a->GetMaxLocal()))
 468                 {
 469                         ServerInstance->Users->QuitUser(this, "No more connections allowed from your host via this connect class (local)");
 470                         if (a->maxconnwarn)
 471                                 ServerInstance->SNO->WriteToSnoMask('a', "WARNING: maximum LOCAL connections (%ld) exceeded for IP %s", a->GetMaxLocal(), this->GetIPString().c_str());
 472                         return;
 473                 }
 474                 else if ((a->GetMaxGlobal()) && (clonecounts.global > a->GetMaxGlobal()))
 475                 {
 476                         ServerInstance->Users->QuitUser(this, "No more connections allowed from your host via this connect class (global)");
 477                         if (a->maxconnwarn)
 478                                 ServerInstance->SNO->WriteToSnoMask('a', "WARNING: maximum GLOBAL connections (%ld) exceeded for IP %s", a->GetMaxGlobal(), this->GetIPString().c_str());
 479                         return;
 480                 }
 481         }
 482
 483         this->nping = ServerInstance->Time() + a->GetPingTime() + ServerInstance->Config->dns_timeout;
 484 }
 485
 486 bool LocalUser::CheckLines(bool doZline)
 487 {
 488         const char* check[] = { "G" , "K", (doZline) ? "Z" : NULL, NULL };
 489
 490         if (!this->exempt)
 491         {
 492                 for (int n = 0; check[n]; ++n)
 493                 {
 494                         XLine *r = ServerInstance->XLines->MatchesLine(check[n], this);
 495
 496                         if (r)
 497                         {
 498                                 r->Apply(this);
 499                                 return true;
 500                         }
 501                 }
 502         }
 503
 504         return false;
 505 }
 506
 507 void LocalUser::FullConnect()
 508 {
 509         ServerInstance->stats.Connects++;
 510         this->idle_lastmsg = ServerInstance->Time();
 511
 512         /*
 513          * You may be thinking "wtf, we checked this in User::AddClient!" - and yes, we did, BUT.
 514          * At the time AddClient is called, we don't have a resolved host, by here we probably do - which
 515          * may put the user into a totally seperate class with different restrictions! so we *must* check again.
 516          * Don't remove this! -- w00t
 517          */
 518         MyClass = NULL;
 519         SetClass();
 520         CheckClass();
 521         CheckLines();
 522
 523         if (quitting)
 524                 return;
 525
 526         this->WriteNumeric(RPL_WELCOME, ":Welcome to the %s IRC Network %s", ServerInstance->Config->Network.c_str(), GetFullRealHost().c_str());
 527         this->WriteNumeric(RPL_YOURHOSTIS, ":Your host is %s, running version %s", ServerInstance->Config->ServerName.c_str(), INSPIRCD_BRANCH);
 528         this->WriteNumeric(RPL_SERVERCREATED, ":This server was created %s %s", __TIME__, __DATE__);
 529
 530         const std::string& modelist = ServerInstance->Modes->GetModeListFor004Numeric();
 531         this->WriteNumeric(RPL_SERVERVERSION, "%s %s %s", ServerInstance->Config->ServerName.c_str(), INSPIRCD_BRANCH, modelist.c_str());
 532
 533         ServerInstance->ISupport.SendTo(this);
 534
 535         /* Now registered */
 536         if (ServerInstance->Users->unregistered_count)
 537                 ServerInstance->Users->unregistered_count--;
 538
 539         /* Trigger MOTD and LUSERS output, give modules a chance too */
 540         ModResult MOD_RESULT;
 541         std::string command("LUSERS");
 542         std::vector<std::string> parameters;
 543         FIRST_MOD_RESULT(OnPreCommand, MOD_RESULT, (command, parameters, this, true, command));
 544         if (!MOD_RESULT)
 545                 ServerInstance->Parser.CallHandler(command, parameters, this);
 546
 547         MOD_RESULT = MOD_RES_PASSTHRU;
 548         command = "MOTD";
 549         FIRST_MOD_RESULT(OnPreCommand, MOD_RESULT, (command, parameters, this, true, command));
 550         if (!MOD_RESULT)
 551                 ServerInstance->Parser.CallHandler(command, parameters, this);
 552
 553         if (ServerInstance->Config->RawLog)
 554                 WriteServ("PRIVMSG %s :*** Raw I/O logging is enabled on this server. All messages, passwords, and commands are being recorded.", nick.c_str());
 555
 556         /*
 557          * We don't set REG_ALL until triggering OnUserConnect, so some module events don't spew out stuff
 558          * for a user that doesn't exist yet.
 559          */
 560         FOREACH_MOD(OnUserConnect, (this));
 561
 562         this->registered = REG_ALL;
 563
 564         FOREACH_MOD(OnPostConnect, (this));
 565
 566         ServerInstance->SNO->WriteToSnoMask('c',"Client connecting on port %d (class %s): %s (%s) [%s]",
 567                 this->GetServerPort(), this->MyClass->name.c_str(), GetFullRealHost().c_str(), this->GetIPString().c_str(), this->fullname.c_str());
 568         ServerInstance->Logs->Log("BANCACHE", LOG_DEBUG, "BanCache: Adding NEGATIVE hit for " + this->GetIPString());
 569         ServerInstance->BanCache.AddHit(this->GetIPString(), "", "");
 570         // reset the flood penalty (which could have been raised due to things like auto +x)
 571         CommandFloodPenalty = 0;
 572 }
 573
 574 void User::InvalidateCache()
 575 {
 576         /* Invalidate cache */
 577         cached_fullhost.clear();
 578         cached_hostip.clear();
 579         cached_makehost.clear();
 580         cached_fullrealhost.clear();
 581 }
 582
 583 bool User::ChangeNick(const std::string& newnick, time_t newts)
 584 {
 585         if (quitting)
 586         {
 587                 ServerInstance->Logs->Log("USERS", LOG_DEFAULT, "ERROR: Attempted to change nick of a quitting user: " + this->nick);
 588                 return false;
 589         }
 590
 591         User* const InUse = ServerInstance->FindNickOnly(newnick);
 592         if (InUse == this)
 593         {
 594                 // case change, don't need to check campers
 595                 // and, if it's identical including case, we can leave right now
 596                 // We also don't update the nick TS if it's a case change, either
 597                 if (newnick == nick)
 598                         return true;
 599         }
 600         else
 601         {
 602                 /*
 603                  * Uh oh.. if the nickname is in use, and it's not in use by the person using it (doh) --
 604                  * then we have a potential collide. Check whether someone else is camping on the nick
 605                  * (i.e. connect -> send NICK, don't send USER.) If they are camping, force-change the
 606                  * camper to their UID, and allow the incoming nick change.
 607                  *
 608                  * If the guy using the nick is already using it, tell the incoming nick change to gtfo,
 609                  * because the nick is already (rightfully) in use. -- w00t
 610                  */
 611                 if (InUse)
 612                 {
 613                         if (InUse->registered != REG_ALL)
 614                         {
 615                                 /* force the camper to their UUID, and ask them to re-send a NICK. */
 616                                 InUse->WriteFrom(InUse, "NICK %s", InUse->uuid.c_str());
 617                                 InUse->WriteNumeric(ERR_NICKNAMEINUSE, "%s :Nickname overruled.", InUse->nick.c_str());
 618
 619                                 InUse->registered &= ~REG_NICK;
 620                                 InUse->ChangeNick(InUse->uuid);
 621                         }
 622                         else
 623                         {
 624                                 /* No camping, tell the incoming user  to stop trying to change nick ;p */
 625                                 this->WriteNumeric(ERR_NICKNAMEINUSE, "%s :Nickname is already in use.", newnick.c_str());
 626                                 return false;
 627                         }
 628                 }
 629
 630                 age = newts ? newts : ServerInstance->Time();
 631         }
 632
 633         if (this->registered == REG_ALL)
 634                 this->WriteCommon("NICK %s",newnick.c_str());
 635         std::string oldnick = nick;
 636         nick = newnick;
 637
 638         InvalidateCache();
 639         ServerInstance->Users->clientlist.erase(oldnick);
 640         ServerInstance->Users->clientlist[newnick] = this;
 641
 642         if (registered == REG_ALL)
 643                 FOREACH_MOD(OnUserPostNick, (this,oldnick));
 644
 645         return true;
 646 }
 647
 648 int LocalUser::GetServerPort()
 649 {
 650         switch (this->server_sa.sa.sa_family)
 651         {
 652                 case AF_INET6:
 653                         return htons(this->server_sa.in6.sin6_port);
 654                 case AF_INET:
 655                         return htons(this->server_sa.in4.sin_port);
 656         }
 657         return 0;
 658 }
 659
 660 const std::string& User::GetIPString()
 661 {
 662         int port;
 663         if (cachedip.empty())
 664         {
 665                 irc::sockets::satoap(client_sa, cachedip, port);
 666                 /* IP addresses starting with a : on irc are a Bad Thing (tm) */
 667                 if (cachedip[0] == ':')
 668                         cachedip.insert(cachedip.begin(),1,'0');
 669         }
 670
 671         return cachedip;
 672 }
 673
 674 irc::sockets::cidr_mask User::GetCIDRMask()
 675 {
 676         int range = 0;
 677         switch (client_sa.sa.sa_family)
 678         {
 679                 case AF_INET6:
 680                         range = ServerInstance->Config->c_ipv6_range;
 681                         break;
 682                 case AF_INET:
 683                         range = ServerInstance->Config->c_ipv4_range;
 684                         break;
 685         }
 686         return irc::sockets::cidr_mask(client_sa, range);
 687 }
 688
 689 bool User::SetClientIP(const char* sip, bool recheck_eline)
 690 {
 691         cachedip.clear();
 692         cached_hostip.clear();
 693         return irc::sockets::aptosa(sip, 0, client_sa);
 694 }
 695
 696 void User::SetClientIP(const irc::sockets::sockaddrs& sa, bool recheck_eline)
 697 {
 698         cachedip.clear();
 699         cached_hostip.clear();
 700         memcpy(&client_sa, &sa, sizeof(irc::sockets::sockaddrs));
 701 }
 702
 703 bool LocalUser::SetClientIP(const char* sip, bool recheck_eline)
 704 {
 705         irc::sockets::sockaddrs sa;
 706         if (!irc::sockets::aptosa(sip, 0, sa))
 707                 // Invalid
 708                 return false;
 709
 710         LocalUser::SetClientIP(sa, recheck_eline);
 711         return true;
 712 }
 713
 714 void LocalUser::SetClientIP(const irc::sockets::sockaddrs& sa, bool recheck_eline)
 715 {
 716         if (sa != client_sa)
 717         {
 718                 User::SetClientIP(sa);
 719                 if (recheck_eline)
 720                         this->exempt = (ServerInstance->XLines->MatchesLine("E", this) != NULL);
 721
 722                 FOREACH_MOD(OnSetUserIP, (this));
 723         }
 724 }
 725
 726 static std::string wide_newline("\r\n");
 727
 728 void User::Write(const std::string& text)
 729 {
 730 }
 731
 732 void User::Write(const char *text, ...)
 733 {
 734 }
 735
 736 void LocalUser::Write(const std::string& text)
 737 {
 738         if (!SocketEngine::BoundsCheckFd(&eh))
 739                 return;
 740
 741         if (text.length() > ServerInstance->Config->Limits.MaxLine - 2)
 742         {
 743                 // this should happen rarely or never. Crop the string at 512 and try again.
 744                 std::string try_again(text, 0, ServerInstance->Config->Limits.MaxLine - 2);
 745                 Write(try_again);
 746                 return;
 747         }
 748
 749         ServerInstance->Logs->Log("USEROUTPUT", LOG_RAWIO, "C[%s] O %s", uuid.c_str(), text.c_str());
 750
 751         eh.AddWriteBuf(text);
 752         eh.AddWriteBuf(wide_newline);
 753
 754         ServerInstance->stats.Sent += text.length() + 2;
 755         this->bytes_out += text.length() + 2;
 756         this->cmds_out++;
 757 }
 758
 759 /** Write()
 760  */
 761 void LocalUser::Write(const char *text, ...)
 762 {
 763         std::string textbuffer;
 764         VAFORMAT(textbuffer, text, text);
 765         this->Write(textbuffer);
 766 }
 767
 768 void User::WriteServ(const std::string& text)
 769 {
 770         this->Write(":%s %s",ServerInstance->Config->ServerName.c_str(),text.c_str());
 771 }
 772
 773 /** WriteServ()
 774  *  Same as Write(), except `text' is prefixed with `:server.name '.
 775  */
 776 void User::WriteServ(const char* text, ...)
 777 {
 778         std::string textbuffer;
 779         VAFORMAT(textbuffer, text, text);
 780         this->WriteServ(textbuffer);
 781 }
 782
 783 void User::WriteCommand(const char* command, const std::string& text)
 784 {
 785         this->WriteServ(command + (this->registered & REG_NICK ? " " + this->nick : " *") + " " + text);
 786 }
 787
 788 void User::WriteNumeric(unsigned int numeric, const char* text, ...)
 789 {
 790         std::string textbuffer;
 791         VAFORMAT(textbuffer, text, text);
 792         this->WriteNumeric(numeric, textbuffer);
 793 }
 794
 795 void User::WriteNumeric(unsigned int numeric, const std::string &text)
 796 {
 797         ModResult MOD_RESULT;
 798
 799         FIRST_MOD_RESULT(OnNumeric, MOD_RESULT, (this, numeric, text));
 800
 801         if (MOD_RESULT == MOD_RES_DENY)
 802                 return;
 803
 804         const std::string message = InspIRCd::Format(":%s %03u %s %s", ServerInstance->Config->ServerName.c_str(),
 805                 numeric, this->registered & REG_NICK ? this->nick.c_str() : "*", text.c_str());
 806         this->Write(message);
 807 }
 808
 809 void User::WriteFrom(User *user, const std::string &text)
 810 {
 811         const std::string message = ":" + user->GetFullHost() + " " + text;
 812         this->Write(message);
 813 }
 814
 815
 816 /* write text from an originating user to originating user */
 817
 818 void User::WriteFrom(User *user, const char* text, ...)
 819 {
 820         std::string textbuffer;
 821         VAFORMAT(textbuffer, text, text);
 822         this->WriteFrom(user, textbuffer);
 823 }
 824
 825 namespace
 826 {
 827         class WriteCommonRawHandler : public User::ForEachNeighborHandler
 828         {
 829                 const std::string& msg;
 830
 831                 void Execute(LocalUser* user) CXX11_OVERRIDE
 832                 {
 833                         user->Write(msg);
 834                 }
 835
 836          public:
 837                 WriteCommonRawHandler(const std::string& message)
 838                         : msg(message)
 839                 {
 840                 }
 841         };
 842 }
 843
 844 void User::WriteCommon(const char* text, ...)
 845 {
 846         std::string textbuffer;
 847         VAFORMAT(textbuffer, text, text);
 848         textbuffer = ":" + this->GetFullHost() + " " + textbuffer;
 849         this->WriteCommonRaw(textbuffer, true);
 850 }
 851
 852 void User::WriteCommonRaw(const std::string &line, bool include_self)
 853 {
 854         WriteCommonRawHandler handler(line);
 855         ForEachNeighbor(handler, include_self);
 856 }
 857
 858 void User::ForEachNeighbor(ForEachNeighborHandler& handler, bool include_self)
 859 {
 860         // The basic logic for visiting the neighbors of a user is to iterate the channel list of the user
 861         // and visit all users on those channels. Because two users may share more than one common channel,
 862         // we must skip users that we have already visited.
 863         // To do this, we make use of a global counter and an integral 'already_sent' field in LocalUser.
 864         // The global counter is incremented every time we do something for each neighbor of a user. Then,
 865         // before visiting a member we examine user->already_sent. If it's equal to the current counter, we
 866         // skip the member. Otherwise, we set it to the current counter and visit the member.
 867
 868         // Ask modules to build a list of exceptions.
 869         // Mods may also exclude entire channels by erasing them from include_chans.
 870         IncludeChanList include_chans(chans.begin(), chans.end());
 871         std::map<User*, bool> exceptions;
 872         exceptions[this] = include_self;
 873         FOREACH_MOD(OnBuildNeighborList, (this, include_chans, exceptions));
 874
 875         // Get next id, guaranteed to differ from the already_sent field of all users
 876         const already_sent_t newid = ++LocalUser::already_sent_id;
 877
 878         // Handle exceptions first
 879         for (std::map<User*, bool>::const_iterator i = exceptions.begin(); i != exceptions.end(); ++i)
 880         {
 881                 LocalUser* curr = IS_LOCAL(i->first);
 882                 if (curr)
 883                 {
 884                         // Mark as visited to ensure we won't visit again if there is a common channel
 885                         curr->already_sent = newid;
 886                         // Always treat quitting users as excluded
 887                         if ((i->second) && (!curr->quitting))
 888                                 handler.Execute(curr);
 889                 }
 890         }
 891
 892         // Now consider the real neighbors
 893         for (IncludeChanList::const_iterator i = include_chans.begin(); i != include_chans.end(); ++i)
 894         {
 895                 Channel* chan = (*i)->chan;
 896                 const Channel::MemberMap& userlist = chan->GetUsers();
 897                 for (Channel::MemberMap::const_iterator j = userlist.begin(); j != userlist.end(); ++j)
 898                 {
 899                         LocalUser* curr = IS_LOCAL(j->first);
 900                         // User not yet visited?
 901                         if ((curr) && (curr->already_sent != newid))
 902                         {
 903                                 // Mark as visited and execute function
 904                                 curr->already_sent = newid;
 905                                 handler.Execute(curr);
 906                         }
 907                 }
 908         }
 909 }
 910
 911 void LocalUser::SendText(const std::string& line)
 912 {
 913         Write(line);
 914 }
 915
 916 void RemoteUser::SendText(const std::string& line)
 917 {
 918         ServerInstance->PI->PushToClient(this, line);
 919 }
 920
 921 void FakeUser::SendText(const std::string& line)
 922 {
 923 }
 924
 925 void User::SendText(const char *text, ...)
 926 {
 927         std::string line;
 928         VAFORMAT(line, text, text);
 929         SendText(line);
 930 }
 931
 932 void User::SendText(const std::string& linePrefix, std::stringstream& textStream)
 933 {
 934         std::string line;
 935         std::string word;
 936         while (textStream >> word)
 937         {
 938                 size_t lineLength = linePrefix.length() + line.length() + word.length() + 3; // "\s\n\r"
 939                 if (lineLength > ServerInstance->Config->Limits.MaxLine)
 940                 {
 941                         SendText(linePrefix + line);
 942                         line.clear();
 943                 }
 944                 line += " " + word;
 945         }
 946         SendText(linePrefix + line);
 947 }
 948
 949 /* return 0 or 1 depending if users u and u2 share one or more common channels
 950  * (used by QUIT, NICK etc which arent channel specific notices)
 951  *
 952  * The old algorithm in 1.0 for this was relatively inefficient, iterating over
 953  * the first users channels then the second users channels within the outer loop,
 954  * therefore it was a maximum of x*y iterations (upon returning 0 and checking
 955  * all possible iterations). However this new function instead checks against the
 956  * channel's userlist in the inner loop which is a std::map<User*,User*>
 957  * and saves us time as we already know what pointer value we are after.
 958  * Don't quote me on the maths as i am not a mathematician or computer scientist,
 959  * but i believe this algorithm is now x+(log y) maximum iterations instead.
 960  */
 961 bool User::SharesChannelWith(User *other)
 962 {
 963         /* Outer loop */
 964         for (User::ChanList::iterator i = this->chans.begin(); i != this->chans.end(); ++i)
 965         {
 966                 /* Eliminate the inner loop (which used to be ~equal in size to the outer loop)
 967                  * by replacing it with a map::find which *should* be more efficient
 968                  */
 969                 if ((*i)->chan->HasUser(other))
 970                         return true;
 971         }
 972         return false;
 973 }
 974
 975 bool User::ChangeName(const std::string& gecos)
 976 {
 977         if (!this->fullname.compare(gecos))
 978                 return true;
 979
 980         if (IS_LOCAL(this))
 981         {
 982                 ModResult MOD_RESULT;
 983                 FIRST_MOD_RESULT(OnChangeLocalUserGECOS, MOD_RESULT, (IS_LOCAL(this),gecos));
 984                 if (MOD_RESULT == MOD_RES_DENY)
 985                         return false;
 986                 FOREACH_MOD(OnChangeName, (this,gecos));
 987         }
 988         this->fullname.assign(gecos, 0, ServerInstance->Config->Limits.MaxGecos);
 989
 990         return true;
 991 }
 992
 993 bool User::ChangeDisplayedHost(const std::string& shost)
 994 {
 995         if (dhost == shost)
 996                 return true;
 997
 998         if (IS_LOCAL(this))
 999         {
1000                 ModResult MOD_RESULT;
1001                 FIRST_MOD_RESULT(OnChangeLocalUserHost, MOD_RESULT, (IS_LOCAL(this),shost));
1002                 if (MOD_RESULT == MOD_RES_DENY)
1003                         return false;
1004         }
1005
1006         FOREACH_MOD(OnChangeHost, (this,shost));
1007
1008         this->dhost.assign(shost, 0, ServerInstance->Config->Limits.MaxHost);
1009         this->InvalidateCache();
1010
1011         if (IS_LOCAL(this))
1012                 this->WriteNumeric(RPL_YOURDISPLAYEDHOST, "%s :is now your displayed host", this->dhost.c_str());
1013
1014         return true;
1015 }
1016
1017 bool User::ChangeIdent(const std::string& newident)
1018 {
1019         if (this->ident == newident)
1020                 return true;
1021
1022         FOREACH_MOD(OnChangeIdent, (this,newident));
1023
1024         this->ident.assign(newident, 0, ServerInstance->Config->Limits.IdentMax);
1025         this->InvalidateCache();
1026
1027         return true;
1028 }
1029
1030 /*
1031  * Sets a user's connection class.
1032  * If the class name is provided, it will be used. Otherwise, the class will be guessed using host/ip/ident/etc.
1033  * NOTE: If the <ALLOW> or <DENY> tag specifies an ip, and this user resolves,
1034  * then their ip will be taken as 'priority' anyway, so for example,
1035  * <connect allow="127.0.0.1"> will match joe!bloggs@localhost
1036  */
1037 void LocalUser::SetClass(const std::string &explicit_name)
1038 {
1039         ConnectClass *found = NULL;
1040
1041         ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "Setting connect class for UID %s", this->uuid.c_str());
1042
1043         if (!explicit_name.empty())
1044         {
1045                 for (ServerConfig::ClassVector::const_iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); ++i)
1046                 {
1047                         ConnectClass* c = *i;
1048
1049                         if (explicit_name == c->name)
1050                         {
1051                                 ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "Explicitly set to %s", explicit_name.c_str());
1052                                 found = c;
1053                         }
1054                 }
1055         }
1056         else
1057         {
1058                 for (ServerConfig::ClassVector::const_iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); ++i)
1059                 {
1060                         ConnectClass* c = *i;
1061                         ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "Checking %s", c->GetName().c_str());
1062
1063                         ModResult MOD_RESULT;
1064                         FIRST_MOD_RESULT(OnSetConnectClass, MOD_RESULT, (this,c));
1065                         if (MOD_RESULT == MOD_RES_DENY)
1066                                 continue;
1067                         if (MOD_RESULT == MOD_RES_ALLOW)
1068                         {
1069                                 ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "Class forced by module to %s", c->GetName().c_str());
1070                                 found = c;
1071                                 break;
1072                         }
1073
1074                         if (c->type == CC_NAMED)
1075                                 continue;
1076
1077                         bool regdone = (registered != REG_NONE);
1078                         if (c->config->getBool("registered", regdone) != regdone)
1079                                 continue;
1080
1081                         /* check if host matches.. */
1082                         if (!InspIRCd::MatchCIDR(this->GetIPString(), c->GetHost(), NULL) &&
1083                             !InspIRCd::MatchCIDR(this->host, c->GetHost(), NULL))
1084                         {
1085                                 ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "No host match (for %s)", c->GetHost().c_str());
1086                                 continue;
1087                         }
1088
1089                         /*
1090                          * deny change if change will take class over the limit check it HERE, not after we found a matching class,
1091                          * because we should attempt to find another class if this one doesn't match us. -- w00t
1092                          */
1093                         if (c->limit && (c->GetReferenceCount() >= c->limit))
1094                         {
1095                                 ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "OOPS: Connect class limit (%lu) hit, denying", c->limit);
1096                                 continue;
1097                         }
1098
1099                         /* if it requires a port ... */
1100                         int port = c->config->getInt("port");
1101                         if (port)
1102                         {
1103                                 ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "Requires port (%d)", port);
1104
1105                                 /* and our port doesn't match, fail. */
1106                                 if (this->GetServerPort() != port)
1107                                         continue;
1108                         }
1109
1110                         if (regdone && !c->config->getString("password").empty())
1111                         {
1112                                 if (!ServerInstance->PassCompare(this, c->config->getString("password"), password, c->config->getString("hash")))
1113                                 {
1114                                         ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "Bad password, skipping");
1115                                         continue;
1116                                 }
1117                         }
1118
1119                         /* we stop at the first class that meets ALL critera. */
1120                         found = c;
1121                         break;
1122                 }
1123         }
1124
1125         /*
1126          * Okay, assuming we found a class that matches.. switch us into that class, keeping refcounts up to date.
1127          */
1128         if (found)
1129         {
1130                 MyClass = found;
1131         }
1132 }
1133
1134 void User::PurgeEmptyChannels()
1135 {
1136         // firstly decrement the count on each channel
1137         for (User::ChanList::iterator i = this->chans.begin(); i != this->chans.end(); )
1138         {
1139                 Channel* c = (*i)->chan;
1140                 ++i;
1141                 c->DelUser(this);
1142         }
1143
1144         this->UnOper();
1145 }
1146
1147 const std::string& FakeUser::GetFullHost()
1148 {
1149         if (!ServerInstance->Config->HideWhoisServer.empty())
1150                 return ServerInstance->Config->HideWhoisServer;
1151         return server->GetName();
1152 }
1153
1154 const std::string& FakeUser::GetFullRealHost()
1155 {
1156         if (!ServerInstance->Config->HideWhoisServer.empty())
1157                 return ServerInstance->Config->HideWhoisServer;
1158         return server->GetName();
1159 }
1160
1161 ConnectClass::ConnectClass(ConfigTag* tag, char t, const std::string& mask)
1162         : config(tag), type(t), fakelag(true), name("unnamed"), registration_timeout(0), host(mask),
1163         pingtime(0), softsendqmax(0), hardsendqmax(0), recvqmax(0),
1164         penaltythreshold(0), commandrate(0), maxlocal(0), maxglobal(0), maxconnwarn(true), maxchans(ServerInstance->Config->MaxChans),
1165         limit(0), resolvehostnames(true)
1166 {
1167 }
1168
1169 ConnectClass::ConnectClass(ConfigTag* tag, char t, const std::string& mask, const ConnectClass& parent)
1170         : config(tag), type(t), fakelag(parent.fakelag), name("unnamed"),
1171         registration_timeout(parent.registration_timeout), host(mask), pingtime(parent.pingtime),
1172         softsendqmax(parent.softsendqmax), hardsendqmax(parent.hardsendqmax), recvqmax(parent.recvqmax),
1173         penaltythreshold(parent.penaltythreshold), commandrate(parent.commandrate),
1174         maxlocal(parent.maxlocal), maxglobal(parent.maxglobal), maxconnwarn(parent.maxconnwarn), maxchans(parent.maxchans),
1175         limit(parent.limit), resolvehostnames(parent.resolvehostnames)
1176 {
1177 }
1178
1179 void ConnectClass::Update(const ConnectClass* src)
1180 {
1181         config = src->config;
1182         type = src->type;
1183         fakelag = src->fakelag;
1184         name = src->name;
1185         registration_timeout = src->registration_timeout;
1186         host = src->host;
1187         pingtime = src->pingtime;
1188         softsendqmax = src->softsendqmax;
1189         hardsendqmax = src->hardsendqmax;
1190         recvqmax = src->recvqmax;
1191         penaltythreshold = src->penaltythreshold;
1192         commandrate = src->commandrate;
1193         maxlocal = src->maxlocal;
1194         maxglobal = src->maxglobal;
1195         maxconnwarn = src->maxconnwarn;
1196         maxchans = src->maxchans;
1197         limit = src->limit;
1198         resolvehostnames = src->resolvehostnames;
1199 }