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