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         if (ServerInstance->FindUUID(uuid))
 101                 ServerInstance->Logs->Log("USERS", LOG_DEFAULT, "User destructor for %s called without cull", uuid.c_str());
 102 }
 103
 104 const std::string& User::MakeHost()
 105 {
 106         if (!this->cached_makehost.empty())
 107                 return this->cached_makehost;
 108
 109         // XXX: Is there really a need to cache this?
 110         this->cached_makehost = ident + "@" + host;
 111         return this->cached_makehost;
 112 }
 113
 114 const std::string& User::MakeHostIP()
 115 {
 116         if (!this->cached_hostip.empty())
 117                 return this->cached_hostip;
 118
 119         // XXX: Is there really a need to cache this?
 120         this->cached_hostip = ident + "@" + this->GetIPString();
 121         return this->cached_hostip;
 122 }
 123
 124 const std::string& User::GetFullHost()
 125 {
 126         if (!this->cached_fullhost.empty())
 127                 return this->cached_fullhost;
 128
 129         // XXX: Is there really a need to cache this?
 130         this->cached_fullhost = nick + "!" + ident + "@" + dhost;
 131         return this->cached_fullhost;
 132 }
 133
 134 const std::string& User::GetFullRealHost()
 135 {
 136         if (!this->cached_fullrealhost.empty())
 137                 return this->cached_fullrealhost;
 138
 139         // XXX: Is there really a need to cache this?
 140         this->cached_fullrealhost = nick + "!" + ident + "@" + host;
 141         return this->cached_fullrealhost;
 142 }
 143
 144 InviteList& LocalUser::GetInviteList()
 145 {
 146         RemoveExpiredInvites();
 147         return invites;
 148 }
 149
 150 bool LocalUser::RemoveInvite(Channel* chan)
 151 {
 152         Invitation* inv = Invitation::Find(chan, this);
 153         if (inv)
 154         {
 155                 delete inv;
 156                 return true;
 157         }
 158         return false;
 159 }
 160
 161 void LocalUser::RemoveExpiredInvites()
 162 {
 163         Invitation::Find(NULL, this);
 164 }
 165
 166 bool User::HasModePermission(unsigned char, ModeType)
 167 {
 168         return true;
 169 }
 170
 171 bool LocalUser::HasModePermission(unsigned char mode, ModeType type)
 172 {
 173         if (!this->IsOper())
 174                 return false;
 175
 176         if (mode < 'A' || mode > ('A' + 64)) return false;
 177
 178         return ((type == MODETYPE_USER ? oper->AllowedUserModes : oper->AllowedChanModes))[(mode - 'A')];
 179
 180 }
 181 /*
 182  * users on remote servers can completely bypass all permissions based checks.
 183  * This prevents desyncs when one server has different type/class tags to another.
 184  * That having been said, this does open things up to the possibility of source changes
 185  * allowing remote kills, etc - but if they have access to the src, they most likely have
 186  * access to the conf - so it's an end to a means either way.
 187  */
 188 bool User::HasPermission(const std::string&)
 189 {
 190         return true;
 191 }
 192
 193 bool LocalUser::HasPermission(const std::string &command)
 194 {
 195         // are they even an oper at all?
 196         if (!this->IsOper())
 197         {
 198                 return false;
 199         }
 200
 201         if (oper->AllowedOperCommands.find(command) != oper->AllowedOperCommands.end())
 202                 return true;
 203         else if (oper->AllowedOperCommands.find("*") != oper->AllowedOperCommands.end())
 204                 return true;
 205
 206         return false;
 207 }
 208
 209 bool User::HasPrivPermission(const std::string &privstr, bool noisy)
 210 {
 211         return true;
 212 }
 213
 214 bool LocalUser::HasPrivPermission(const std::string &privstr, bool noisy)
 215 {
 216         if (!this->IsOper())
 217         {
 218                 if (noisy)
 219                         this->WriteNotice("You are not an oper");
 220                 return false;
 221         }
 222
 223         if (oper->AllowedPrivs.find(privstr) != oper->AllowedPrivs.end())
 224         {
 225                 return true;
 226         }
 227         else if (oper->AllowedPrivs.find("*") != oper->AllowedPrivs.end())
 228         {
 229                 return true;
 230         }
 231
 232         if (noisy)
 233                 this->WriteNotice("Oper type " + oper->name + " does not have access to priv " + privstr);
 234
 235         return false;
 236 }
 237
 238 void UserIOHandler::OnDataReady()
 239 {
 240         if (user->quitting)
 241                 return;
 242
 243         if (recvq.length() > user->MyClass->GetRecvqMax() && !user->HasPrivPermission("users/flood/increased-buffers"))
 244         {
 245                 ServerInstance->Users->QuitUser(user, "RecvQ exceeded");
 246                 ServerInstance->SNO->WriteToSnoMask('a', "User %s RecvQ of %lu exceeds connect class maximum of %lu",
 247                         user->nick.c_str(), (unsigned long)recvq.length(), user->MyClass->GetRecvqMax());
 248                 return;
 249         }
 250         unsigned long sendqmax = ULONG_MAX;
 251         if (!user->HasPrivPermission("users/flood/increased-buffers"))
 252                 sendqmax = user->MyClass->GetSendqSoftMax();
 253         unsigned long penaltymax = ULONG_MAX;
 254         if (!user->HasPrivPermission("users/flood/no-fakelag"))
 255                 penaltymax = user->MyClass->GetPenaltyThreshold() * 1000;
 256
 257         while (user->CommandFloodPenalty < penaltymax && getSendQSize() < sendqmax)
 258         {
 259                 std::string line;
 260                 line.reserve(ServerInstance->Config->Limits.MaxLine);
 261                 std::string::size_type qpos = 0;
 262                 while (qpos < recvq.length())
 263                 {
 264                         char c = recvq[qpos++];
 265                         switch (c)
 266                         {
 267                         case '\0':
 268                                 c = ' ';
 269                                 break;
 270                         case '\r':
 271                                 continue;
 272                         case '\n':
 273                                 goto eol_found;
 274                         }
 275                         if (line.length() < ServerInstance->Config->Limits.MaxLine - 2)
 276                                 line.push_back(c);
 277                 }
 278                 // if we got here, the recvq ran out before we found a newline
 279                 return;
 280 eol_found:
 281                 // just found a newline. Terminate the string, and pull it out of recvq
 282                 recvq = recvq.substr(qpos);
 283
 284                 // TODO should this be moved to when it was inserted in recvq?
 285                 ServerInstance->stats.Recv += qpos;
 286                 user->bytes_in += qpos;
 287                 user->cmds_in++;
 288
 289                 ServerInstance->Parser.ProcessBuffer(line, user);
 290                 if (user->quitting)
 291                         return;
 292         }
 293         if (user->CommandFloodPenalty >= penaltymax && !user->MyClass->fakelag)
 294                 ServerInstance->Users->QuitUser(user, "Excess Flood");
 295 }
 296
 297 void UserIOHandler::AddWriteBuf(const std::string &data)
 298 {
 299         if (user->quitting_sendq)
 300                 return;
 301         if (!user->quitting && getSendQSize() + data.length() > user->MyClass->GetSendqHardMax() &&
 302                 !user->HasPrivPermission("users/flood/increased-buffers"))
 303         {
 304                 user->quitting_sendq = true;
 305                 ServerInstance->GlobalCulls.AddSQItem(user);
 306                 return;
 307         }
 308
 309         // We still want to append data to the sendq of a quitting user,
 310         // e.g. their ERROR message that says 'closing link'
 311
 312         WriteData(data);
 313 }
 314
 315 void UserIOHandler::OnError(BufferedSocketError)
 316 {
 317         ServerInstance->Users->QuitUser(user, getError());
 318 }
 319
 320 CullResult User::cull()
 321 {
 322         if (!quitting)
 323                 ServerInstance->Users->QuitUser(this, "Culled without QuitUser");
 324
 325         if (client_sa.sa.sa_family != AF_UNSPEC)
 326                 ServerInstance->Users->RemoveCloneCounts(this);
 327
 328         return Extensible::cull();
 329 }
 330
 331 CullResult LocalUser::cull()
 332 {
 333         ClearInvites();
 334         eh.cull();
 335         return User::cull();
 336 }
 337
 338 CullResult FakeUser::cull()
 339 {
 340         // Fake users don't quit, they just get culled.
 341         quitting = true;
 342         // Fake users are not inserted into UserManager::clientlist, they're only in the uuidlist
 343         ServerInstance->Users->uuidlist.erase(uuid);
 344         return User::cull();
 345 }
 346
 347 void User::Oper(OperInfo* info)
 348 {
 349         ModeHandler* opermh = ServerInstance->Modes->FindMode('o', MODETYPE_USER);
 350         if (this->IsModeSet(opermh))
 351                 this->UnOper();
 352
 353         this->SetMode(opermh, true);
 354         this->oper = info;
 355         this->WriteCommand("MODE", "+o");
 356         FOREACH_MOD(OnOper, (this, info->name));
 357
 358         std::string opername;
 359         if (info->oper_block)
 360                 opername = info->oper_block->getString("name");
 361
 362         if (IS_LOCAL(this))
 363         {
 364                 LocalUser* l = IS_LOCAL(this);
 365                 std::string vhost = oper->getConfig("vhost");
 366                 if (!vhost.empty())
 367                         l->ChangeDisplayedHost(vhost.c_str());
 368                 std::string opClass = oper->getConfig("class");
 369                 if (!opClass.empty())
 370                         l->SetClass(opClass);
 371         }
 372
 373         ServerInstance->SNO->WriteToSnoMask('o',"%s (%s@%s) is now an IRC operator of type %s (using oper '%s')",
 374                 nick.c_str(), ident.c_str(), host.c_str(), oper->name.c_str(), opername.c_str());
 375         this->WriteNumeric(RPL_YOUAREOPER, ":You are now %s %s", strchr("aeiouAEIOU", oper->name[0]) ? "an" : "a", oper->name.c_str());
 376
 377         ServerInstance->Logs->Log("OPER", LOG_DEFAULT, "%s opered as type: %s", GetFullRealHost().c_str(), oper->name.c_str());
 378         ServerInstance->Users->all_opers.push_back(this);
 379
 380         // Expand permissions from config for faster lookup
 381         if (IS_LOCAL(this))
 382                 oper->init();
 383
 384         FOREACH_MOD(OnPostOper, (this, oper->name, opername));
 385 }
 386
 387 void OperInfo::init()
 388 {
 389         AllowedOperCommands.clear();
 390         AllowedPrivs.clear();
 391         AllowedUserModes.reset();
 392         AllowedChanModes.reset();
 393         AllowedUserModes['o' - 'A'] = true; // Call me paranoid if you want.
 394
 395         for(std::vector<reference<ConfigTag> >::iterator iter = class_blocks.begin(); iter != class_blocks.end(); ++iter)
 396         {
 397                 ConfigTag* tag = *iter;
 398                 std::string mycmd, mypriv;
 399                 /* Process commands */
 400                 irc::spacesepstream CommandList(tag->getString("commands"));
 401                 while (CommandList.GetToken(mycmd))
 402                 {
 403                         AllowedOperCommands.insert(mycmd);
 404                 }
 405
 406                 irc::spacesepstream PrivList(tag->getString("privs"));
 407                 while (PrivList.GetToken(mypriv))
 408                 {
 409                         AllowedPrivs.insert(mypriv);
 410                 }
 411
 412                 std::string modes = tag->getString("usermodes");
 413                 for (std::string::const_iterator c = modes.begin(); c != modes.end(); ++c)
 414                 {
 415                         if (*c == '*')
 416                         {
 417                                 this->AllowedUserModes.set();
 418                         }
 419                         else if (*c >= 'A' && *c < 'z')
 420                         {
 421                                 this->AllowedUserModes[*c - 'A'] = true;
 422                         }
 423                 }
 424
 425                 modes = tag->getString("chanmodes");
 426                 for (std::string::const_iterator c = modes.begin(); c != modes.end(); ++c)
 427                 {
 428                         if (*c == '*')
 429                         {
 430                                 this->AllowedChanModes.set();
 431                         }
 432                         else if (*c >= 'A' && *c < 'z')
 433                         {
 434                                 this->AllowedChanModes[*c - 'A'] = true;
 435                         }
 436                 }
 437         }
 438 }
 439
 440 void User::UnOper()
 441 {
 442         if (!this->IsOper())
 443                 return;
 444
 445         /*
 446          * unset their oper type (what IS_OPER checks).
 447          * note, order is important - this must come before modes as -o attempts
 448          * to call UnOper. -- w00t
 449          */
 450         oper = NULL;
 451
 452
 453         /* Remove all oper only modes from the user when the deoper - Bug #466*/
 454         std::string moderemove("-");
 455
 456         for (unsigned char letter = 'A'; letter <= 'z'; letter++)
 457         {
 458                 ModeHandler* mh = ServerInstance->Modes->FindMode(letter, MODETYPE_USER);
 459                 if (mh && mh->NeedsOper())
 460                         moderemove += letter;
 461         }
 462
 463
 464         std::vector<std::string> parameters;
 465         parameters.push_back(this->nick);
 466         parameters.push_back(moderemove);
 467
 468         ServerInstance->Modes->Process(parameters, this);
 469
 470         // Remove the user from the oper list
 471         stdalgo::vector::swaperase(ServerInstance->Users->all_opers, this);
 472
 473         ModeHandler* opermh = ServerInstance->Modes->FindMode('o', MODETYPE_USER);
 474         this->SetMode(opermh, false);
 475 }
 476
 477 /*
 478  * Check class restrictions
 479  */
 480 void LocalUser::CheckClass(bool clone_count)
 481 {
 482         ConnectClass* a = this->MyClass;
 483
 484         if (!a)
 485         {
 486                 ServerInstance->Users->QuitUser(this, "Access denied by configuration");
 487                 return;
 488         }
 489         else if (a->type == CC_DENY)
 490         {
 491                 ServerInstance->Users->QuitUser(this, a->config->getString("reason", "Unauthorised connection"));
 492                 return;
 493         }
 494         else if (clone_count)
 495         {
 496                 const UserManager::CloneCounts& clonecounts = ServerInstance->Users->GetCloneCounts(this);
 497                 if ((a->GetMaxLocal()) && (clonecounts.local > a->GetMaxLocal()))
 498                 {
 499                         ServerInstance->Users->QuitUser(this, "No more connections allowed from your host via this connect class (local)");
 500                         if (a->maxconnwarn)
 501                                 ServerInstance->SNO->WriteToSnoMask('a', "WARNING: maximum LOCAL connections (%ld) exceeded for IP %s", a->GetMaxLocal(), this->GetIPString().c_str());
 502                         return;
 503                 }
 504                 else if ((a->GetMaxGlobal()) && (clonecounts.global > a->GetMaxGlobal()))
 505                 {
 506                         ServerInstance->Users->QuitUser(this, "No more connections allowed from your host via this connect class (global)");
 507                         if (a->maxconnwarn)
 508                                 ServerInstance->SNO->WriteToSnoMask('a', "WARNING: maximum GLOBAL connections (%ld) exceeded for IP %s", a->GetMaxGlobal(), this->GetIPString().c_str());
 509                         return;
 510                 }
 511         }
 512
 513         this->nping = ServerInstance->Time() + a->GetPingTime() + ServerInstance->Config->dns_timeout;
 514 }
 515
 516 bool LocalUser::CheckLines(bool doZline)
 517 {
 518         const char* check[] = { "G" , "K", (doZline) ? "Z" : NULL, NULL };
 519
 520         if (!this->exempt)
 521         {
 522                 for (int n = 0; check[n]; ++n)
 523                 {
 524                         XLine *r = ServerInstance->XLines->MatchesLine(check[n], this);
 525
 526                         if (r)
 527                         {
 528                                 r->Apply(this);
 529                                 return true;
 530                         }
 531                 }
 532         }
 533
 534         return false;
 535 }
 536
 537 void LocalUser::FullConnect()
 538 {
 539         ServerInstance->stats.Connects++;
 540         this->idle_lastmsg = ServerInstance->Time();
 541
 542         /*
 543          * You may be thinking "wtf, we checked this in User::AddClient!" - and yes, we did, BUT.
 544          * At the time AddClient is called, we don't have a resolved host, by here we probably do - which
 545          * may put the user into a totally seperate class with different restrictions! so we *must* check again.
 546          * Don't remove this! -- w00t
 547          */
 548         MyClass = NULL;
 549         SetClass();
 550         CheckClass();
 551         CheckLines();
 552
 553         if (quitting)
 554                 return;
 555
 556         this->WriteNumeric(RPL_WELCOME, ":Welcome to the %s IRC Network %s", ServerInstance->Config->Network.c_str(), GetFullRealHost().c_str());
 557         this->WriteNumeric(RPL_YOURHOSTIS, ":Your host is %s, running version %s", ServerInstance->Config->ServerName.c_str(), INSPIRCD_BRANCH);
 558         this->WriteNumeric(RPL_SERVERCREATED, ":This server was created %s %s", __TIME__, __DATE__);
 559
 560         const std::string& modelist = ServerInstance->Modes->GetModeListFor004Numeric();
 561         this->WriteNumeric(RPL_SERVERVERSION, "%s %s %s", ServerInstance->Config->ServerName.c_str(), INSPIRCD_BRANCH, modelist.c_str());
 562
 563         ServerInstance->ISupport.SendTo(this);
 564
 565         /* Now registered */
 566         if (ServerInstance->Users->unregistered_count)
 567                 ServerInstance->Users->unregistered_count--;
 568
 569         /* Trigger MOTD and LUSERS output, give modules a chance too */
 570         ModResult MOD_RESULT;
 571         std::string command("LUSERS");
 572         std::vector<std::string> parameters;
 573         FIRST_MOD_RESULT(OnPreCommand, MOD_RESULT, (command, parameters, this, true, command));
 574         if (!MOD_RESULT)
 575                 ServerInstance->Parser.CallHandler(command, parameters, this);
 576
 577         MOD_RESULT = MOD_RES_PASSTHRU;
 578         command = "MOTD";
 579         FIRST_MOD_RESULT(OnPreCommand, MOD_RESULT, (command, parameters, this, true, command));
 580         if (!MOD_RESULT)
 581                 ServerInstance->Parser.CallHandler(command, parameters, this);
 582
 583         if (ServerInstance->Config->RawLog)
 584                 WriteServ("PRIVMSG %s :*** Raw I/O logging is enabled on this server. All messages, passwords, and commands are being recorded.", nick.c_str());
 585
 586         /*
 587          * We don't set REG_ALL until triggering OnUserConnect, so some module events don't spew out stuff
 588          * for a user that doesn't exist yet.
 589          */
 590         FOREACH_MOD(OnUserConnect, (this));
 591
 592         this->registered = REG_ALL;
 593
 594         FOREACH_MOD(OnPostConnect, (this));
 595
 596         ServerInstance->SNO->WriteToSnoMask('c',"Client connecting on port %d (class %s): %s (%s) [%s]",
 597                 this->GetServerPort(), this->MyClass->name.c_str(), GetFullRealHost().c_str(), this->GetIPString().c_str(), this->fullname.c_str());
 598         ServerInstance->Logs->Log("BANCACHE", LOG_DEBUG, "BanCache: Adding NEGATIVE hit for " + this->GetIPString());
 599         ServerInstance->BanCache.AddHit(this->GetIPString(), "", "");
 600         // reset the flood penalty (which could have been raised due to things like auto +x)
 601         CommandFloodPenalty = 0;
 602 }
 603
 604 void User::InvalidateCache()
 605 {
 606         /* Invalidate cache */
 607         cached_fullhost.clear();
 608         cached_hostip.clear();
 609         cached_makehost.clear();
 610         cached_fullrealhost.clear();
 611 }
 612
 613 bool User::ChangeNick(const std::string& newnick, time_t newts)
 614 {
 615         if (quitting)
 616         {
 617                 ServerInstance->Logs->Log("USERS", LOG_DEFAULT, "ERROR: Attempted to change nick of a quitting user: " + this->nick);
 618                 return false;
 619         }
 620
 621         User* const InUse = ServerInstance->FindNickOnly(newnick);
 622         if (InUse == this)
 623         {
 624                 // case change, don't need to check campers
 625                 // and, if it's identical including case, we can leave right now
 626                 // We also don't update the nick TS if it's a case change, either
 627                 if (newnick == nick)
 628                         return true;
 629         }
 630         else
 631         {
 632                 /*
 633                  * Uh oh.. if the nickname is in use, and it's not in use by the person using it (doh) --
 634                  * then we have a potential collide. Check whether someone else is camping on the nick
 635                  * (i.e. connect -> send NICK, don't send USER.) If they are camping, force-change the
 636                  * camper to their UID, and allow the incoming nick change.
 637                  *
 638                  * If the guy using the nick is already using it, tell the incoming nick change to gtfo,
 639                  * because the nick is already (rightfully) in use. -- w00t
 640                  */
 641                 if (InUse)
 642                 {
 643                         if (InUse->registered != REG_ALL)
 644                         {
 645                                 /* force the camper to their UUID, and ask them to re-send a NICK. */
 646                                 InUse->WriteFrom(InUse, "NICK %s", InUse->uuid.c_str());
 647                                 InUse->WriteNumeric(ERR_NICKNAMEINUSE, "%s :Nickname overruled.", InUse->nick.c_str());
 648
 649                                 InUse->registered &= ~REG_NICK;
 650                                 InUse->ChangeNick(InUse->uuid);
 651                         }
 652                         else
 653                         {
 654                                 /* No camping, tell the incoming user  to stop trying to change nick ;p */
 655                                 this->WriteNumeric(ERR_NICKNAMEINUSE, "%s :Nickname is already in use.", newnick.c_str());
 656                                 return false;
 657                         }
 658                 }
 659
 660                 age = newts ? newts : ServerInstance->Time();
 661         }
 662
 663         if (this->registered == REG_ALL)
 664                 this->WriteCommon("NICK %s",newnick.c_str());
 665         std::string oldnick = nick;
 666         nick = newnick;
 667
 668         InvalidateCache();
 669         ServerInstance->Users->clientlist.erase(oldnick);
 670         ServerInstance->Users->clientlist[newnick] = this;
 671
 672         if (registered == REG_ALL)
 673                 FOREACH_MOD(OnUserPostNick, (this,oldnick));
 674
 675         return true;
 676 }
 677
 678 int LocalUser::GetServerPort()
 679 {
 680         switch (this->server_sa.sa.sa_family)
 681         {
 682                 case AF_INET6:
 683                         return htons(this->server_sa.in6.sin6_port);
 684                 case AF_INET:
 685                         return htons(this->server_sa.in4.sin_port);
 686         }
 687         return 0;
 688 }
 689
 690 const std::string& User::GetIPString()
 691 {
 692         int port;
 693         if (cachedip.empty())
 694         {
 695                 irc::sockets::satoap(client_sa, cachedip, port);
 696                 /* IP addresses starting with a : on irc are a Bad Thing (tm) */
 697                 if (cachedip[0] == ':')
 698                         cachedip.insert(cachedip.begin(),1,'0');
 699         }
 700
 701         return cachedip;
 702 }
 703
 704 irc::sockets::cidr_mask User::GetCIDRMask()
 705 {
 706         int range = 0;
 707         switch (client_sa.sa.sa_family)
 708         {
 709                 case AF_INET6:
 710                         range = ServerInstance->Config->c_ipv6_range;
 711                         break;
 712                 case AF_INET:
 713                         range = ServerInstance->Config->c_ipv4_range;
 714                         break;
 715         }
 716         return irc::sockets::cidr_mask(client_sa, range);
 717 }
 718
 719 bool User::SetClientIP(const char* sip, bool recheck_eline)
 720 {
 721         cachedip.clear();
 722         cached_hostip.clear();
 723         return irc::sockets::aptosa(sip, 0, client_sa);
 724 }
 725
 726 void User::SetClientIP(const irc::sockets::sockaddrs& sa, bool recheck_eline)
 727 {
 728         cachedip.clear();
 729         cached_hostip.clear();
 730         memcpy(&client_sa, &sa, sizeof(irc::sockets::sockaddrs));
 731 }
 732
 733 bool LocalUser::SetClientIP(const char* sip, bool recheck_eline)
 734 {
 735         irc::sockets::sockaddrs sa;
 736         if (!irc::sockets::aptosa(sip, 0, sa))
 737                 // Invalid
 738                 return false;
 739
 740         LocalUser::SetClientIP(sa, recheck_eline);
 741         return true;
 742 }
 743
 744 void LocalUser::SetClientIP(const irc::sockets::sockaddrs& sa, bool recheck_eline)
 745 {
 746         if (sa != client_sa)
 747         {
 748                 User::SetClientIP(sa);
 749                 if (recheck_eline)
 750                         this->exempt = (ServerInstance->XLines->MatchesLine("E", this) != NULL);
 751
 752                 FOREACH_MOD(OnSetUserIP, (this));
 753         }
 754 }
 755
 756 static std::string wide_newline("\r\n");
 757
 758 void User::Write(const std::string& text)
 759 {
 760 }
 761
 762 void User::Write(const char *text, ...)
 763 {
 764 }
 765
 766 void LocalUser::Write(const std::string& text)
 767 {
 768         if (!SocketEngine::BoundsCheckFd(&eh))
 769                 return;
 770
 771         if (text.length() > ServerInstance->Config->Limits.MaxLine - 2)
 772         {
 773                 // this should happen rarely or never. Crop the string at 512 and try again.
 774                 std::string try_again = text.substr(0, ServerInstance->Config->Limits.MaxLine - 2);
 775                 Write(try_again);
 776                 return;
 777         }
 778
 779         ServerInstance->Logs->Log("USEROUTPUT", LOG_RAWIO, "C[%s] O %s", uuid.c_str(), text.c_str());
 780
 781         eh.AddWriteBuf(text);
 782         eh.AddWriteBuf(wide_newline);
 783
 784         ServerInstance->stats.Sent += text.length() + 2;
 785         this->bytes_out += text.length() + 2;
 786         this->cmds_out++;
 787 }
 788
 789 /** Write()
 790  */
 791 void LocalUser::Write(const char *text, ...)
 792 {
 793         std::string textbuffer;
 794         VAFORMAT(textbuffer, text, text);
 795         this->Write(textbuffer);
 796 }
 797
 798 void User::WriteServ(const std::string& text)
 799 {
 800         this->Write(":%s %s",ServerInstance->Config->ServerName.c_str(),text.c_str());
 801 }
 802
 803 /** WriteServ()
 804  *  Same as Write(), except `text' is prefixed with `:server.name '.
 805  */
 806 void User::WriteServ(const char* text, ...)
 807 {
 808         std::string textbuffer;
 809         VAFORMAT(textbuffer, text, text);
 810         this->WriteServ(textbuffer);
 811 }
 812
 813 void User::WriteCommand(const char* command, const std::string& text)
 814 {
 815         this->WriteServ(command + (this->registered & REG_NICK ? " " + this->nick : " *") + " " + text);
 816 }
 817
 818 void User::WriteNumeric(unsigned int numeric, const char* text, ...)
 819 {
 820         std::string textbuffer;
 821         VAFORMAT(textbuffer, text, text);
 822         this->WriteNumeric(numeric, textbuffer);
 823 }
 824
 825 void User::WriteNumeric(unsigned int numeric, const std::string &text)
 826 {
 827         ModResult MOD_RESULT;
 828
 829         FIRST_MOD_RESULT(OnNumeric, MOD_RESULT, (this, numeric, text));
 830
 831         if (MOD_RESULT == MOD_RES_DENY)
 832                 return;
 833
 834         const std::string message = InspIRCd::Format(":%s %03u %s %s", ServerInstance->Config->ServerName.c_str(),
 835                 numeric, this->registered & REG_NICK ? this->nick.c_str() : "*", text.c_str());
 836         this->Write(message);
 837 }
 838
 839 void User::WriteFrom(User *user, const std::string &text)
 840 {
 841         const std::string message = ":" + user->GetFullHost() + " " + text;
 842         this->Write(message);
 843 }
 844
 845
 846 /* write text from an originating user to originating user */
 847
 848 void User::WriteFrom(User *user, const char* text, ...)
 849 {
 850         std::string textbuffer;
 851         VAFORMAT(textbuffer, text, text);
 852         this->WriteFrom(user, textbuffer);
 853 }
 854
 855 void User::WriteCommon(const char* text, ...)
 856 {
 857         if (this->registered != REG_ALL || quitting)
 858                 return;
 859
 860         std::string textbuffer;
 861         VAFORMAT(textbuffer, text, text);
 862         textbuffer = ":" + this->GetFullHost() + " " + textbuffer;
 863         this->WriteCommonRaw(textbuffer, true);
 864 }
 865
 866 void User::WriteCommonRaw(const std::string &line, bool include_self)
 867 {
 868         if (this->registered != REG_ALL || quitting)
 869                 return;
 870
 871         LocalUser::already_sent_id++;
 872
 873         IncludeChanList include_c(chans.begin(), chans.end());
 874         std::map<User*,bool> exceptions;
 875
 876         exceptions[this] = include_self;
 877
 878         FOREACH_MOD(OnBuildNeighborList, (this, include_c, exceptions));
 879
 880         for (std::map<User*,bool>::iterator i = exceptions.begin(); i != exceptions.end(); ++i)
 881         {
 882                 LocalUser* u = IS_LOCAL(i->first);
 883                 if (u && !u->quitting)
 884                 {
 885                         u->already_sent = LocalUser::already_sent_id;
 886                         if (i->second)
 887                                 u->Write(line);
 888                 }
 889         }
 890         for (IncludeChanList::const_iterator v = include_c.begin(); v != include_c.end(); ++v)
 891         {
 892                 Channel* c = (*v)->chan;
 893                 const Channel::MemberMap& ulist = c->GetUsers();
 894                 for (Channel::MemberMap::const_iterator i = ulist.begin(); i != ulist.end(); ++i)
 895                 {
 896                         LocalUser* u = IS_LOCAL(i->first);
 897                         if (u && u->already_sent != LocalUser::already_sent_id)
 898                         {
 899                                 u->already_sent = LocalUser::already_sent_id;
 900                                 u->Write(line);
 901                         }
 902                 }
 903         }
 904 }
 905
 906 void User::WriteCommonQuit(const std::string &normal_text, const std::string &oper_text)
 907 {
 908         if (this->registered != REG_ALL)
 909                 return;
 910
 911         already_sent_t uniq_id = ++LocalUser::already_sent_id;
 912
 913         const std::string normalMessage = ":" + this->GetFullHost() + " QUIT :" + normal_text;
 914         const std::string operMessage = ":" + this->GetFullHost() + " QUIT :" + oper_text;
 915
 916         IncludeChanList include_c(chans.begin(), chans.end());
 917         std::map<User*,bool> exceptions;
 918
 919         FOREACH_MOD(OnBuildNeighborList, (this, include_c, exceptions));
 920
 921         for (std::map<User*,bool>::iterator i = exceptions.begin(); i != exceptions.end(); ++i)
 922         {
 923                 LocalUser* u = IS_LOCAL(i->first);
 924                 if (u && !u->quitting)
 925                 {
 926                         u->already_sent = uniq_id;
 927                         if (i->second)
 928                                 u->Write(u->IsOper() ? operMessage : normalMessage);
 929                 }
 930         }
 931         for (IncludeChanList::const_iterator v = include_c.begin(); v != include_c.end(); ++v)
 932         {
 933                 const Channel::MemberMap& ulist = (*v)->chan->GetUsers();
 934                 for (Channel::MemberMap::const_iterator i = ulist.begin(); i != ulist.end(); i++)
 935                 {
 936                         LocalUser* u = IS_LOCAL(i->first);
 937                         if (u && (u->already_sent != uniq_id))
 938                         {
 939                                 u->already_sent = uniq_id;
 940                                 u->Write(u->IsOper() ? operMessage : normalMessage);
 941                         }
 942                 }
 943         }
 944 }
 945
 946 void LocalUser::SendText(const std::string& line)
 947 {
 948         Write(line);
 949 }
 950
 951 void RemoteUser::SendText(const std::string& line)
 952 {
 953         ServerInstance->PI->PushToClient(this, line);
 954 }
 955
 956 void FakeUser::SendText(const std::string& line)
 957 {
 958 }
 959
 960 void User::SendText(const char *text, ...)
 961 {
 962         std::string line;
 963         VAFORMAT(line, text, text);
 964         SendText(line);
 965 }
 966
 967 void User::SendText(const std::string& linePrefix, std::stringstream& textStream)
 968 {
 969         std::string line;
 970         std::string word;
 971         while (textStream >> word)
 972         {
 973                 size_t lineLength = linePrefix.length() + line.length() + word.length() + 3; // "\s\n\r"
 974                 if (lineLength > ServerInstance->Config->Limits.MaxLine)
 975                 {
 976                         SendText(linePrefix + line);
 977                         line.clear();
 978                 }
 979                 line += " " + word;
 980         }
 981         SendText(linePrefix + line);
 982 }
 983
 984 /* return 0 or 1 depending if users u and u2 share one or more common channels
 985  * (used by QUIT, NICK etc which arent channel specific notices)
 986  *
 987  * The old algorithm in 1.0 for this was relatively inefficient, iterating over
 988  * the first users channels then the second users channels within the outer loop,
 989  * therefore it was a maximum of x*y iterations (upon returning 0 and checking
 990  * all possible iterations). However this new function instead checks against the
 991  * channel's userlist in the inner loop which is a std::map<User*,User*>
 992  * and saves us time as we already know what pointer value we are after.
 993  * Don't quote me on the maths as i am not a mathematician or computer scientist,
 994  * but i believe this algorithm is now x+(log y) maximum iterations instead.
 995  */
 996 bool User::SharesChannelWith(User *other)
 997 {
 998         /* Outer loop */
 999         for (User::ChanList::iterator i = this->chans.begin(); i != this->chans.end(); ++i)
1000         {
1001                 /* Eliminate the inner loop (which used to be ~equal in size to the outer loop)
1002                  * by replacing it with a map::find which *should* be more efficient
1003                  */
1004                 if ((*i)->chan->HasUser(other))
1005                         return true;
1006         }
1007         return false;
1008 }
1009
1010 bool User::ChangeName(const std::string& gecos)
1011 {
1012         if (!this->fullname.compare(gecos))
1013                 return true;
1014
1015         if (IS_LOCAL(this))
1016         {
1017                 ModResult MOD_RESULT;
1018                 FIRST_MOD_RESULT(OnChangeLocalUserGECOS, MOD_RESULT, (IS_LOCAL(this),gecos));
1019                 if (MOD_RESULT == MOD_RES_DENY)
1020                         return false;
1021                 FOREACH_MOD(OnChangeName, (this,gecos));
1022         }
1023         this->fullname.assign(gecos, 0, ServerInstance->Config->Limits.MaxGecos);
1024
1025         return true;
1026 }
1027
1028 bool User::ChangeDisplayedHost(const std::string& shost)
1029 {
1030         if (dhost == shost)
1031                 return true;
1032
1033         if (IS_LOCAL(this))
1034         {
1035                 ModResult MOD_RESULT;
1036                 FIRST_MOD_RESULT(OnChangeLocalUserHost, MOD_RESULT, (IS_LOCAL(this),shost));
1037                 if (MOD_RESULT == MOD_RES_DENY)
1038                         return false;
1039         }
1040
1041         FOREACH_MOD(OnChangeHost, (this,shost));
1042
1043         this->dhost.assign(shost, 0, ServerInstance->Config->Limits.MaxHost);
1044         this->InvalidateCache();
1045
1046         if (IS_LOCAL(this))
1047                 this->WriteNumeric(RPL_YOURDISPLAYEDHOST, "%s :is now your displayed host", this->dhost.c_str());
1048
1049         return true;
1050 }
1051
1052 bool User::ChangeIdent(const std::string& newident)
1053 {
1054         if (this->ident == newident)
1055                 return true;
1056
1057         FOREACH_MOD(OnChangeIdent, (this,newident));
1058
1059         this->ident.assign(newident, 0, ServerInstance->Config->Limits.IdentMax);
1060         this->InvalidateCache();
1061
1062         return true;
1063 }
1064
1065 /*
1066  * Sets a user's connection class.
1067  * If the class name is provided, it will be used. Otherwise, the class will be guessed using host/ip/ident/etc.
1068  * NOTE: If the <ALLOW> or <DENY> tag specifies an ip, and this user resolves,
1069  * then their ip will be taken as 'priority' anyway, so for example,
1070  * <connect allow="127.0.0.1"> will match joe!bloggs@localhost
1071  */
1072 void LocalUser::SetClass(const std::string &explicit_name)
1073 {
1074         ConnectClass *found = NULL;
1075
1076         ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "Setting connect class for UID %s", this->uuid.c_str());
1077
1078         if (!explicit_name.empty())
1079         {
1080                 for (ServerConfig::ClassVector::const_iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); ++i)
1081                 {
1082                         ConnectClass* c = *i;
1083
1084                         if (explicit_name == c->name)
1085                         {
1086                                 ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "Explicitly set to %s", explicit_name.c_str());
1087                                 found = c;
1088                         }
1089                 }
1090         }
1091         else
1092         {
1093                 for (ServerConfig::ClassVector::const_iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); ++i)
1094                 {
1095                         ConnectClass* c = *i;
1096                         ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "Checking %s", c->GetName().c_str());
1097
1098                         ModResult MOD_RESULT;
1099                         FIRST_MOD_RESULT(OnSetConnectClass, MOD_RESULT, (this,c));
1100                         if (MOD_RESULT == MOD_RES_DENY)
1101                                 continue;
1102                         if (MOD_RESULT == MOD_RES_ALLOW)
1103                         {
1104                                 ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "Class forced by module to %s", c->GetName().c_str());
1105                                 found = c;
1106                                 break;
1107                         }
1108
1109                         if (c->type == CC_NAMED)
1110                                 continue;
1111
1112                         bool regdone = (registered != REG_NONE);
1113                         if (c->config->getBool("registered", regdone) != regdone)
1114                                 continue;
1115
1116                         /* check if host matches.. */
1117                         if (!InspIRCd::MatchCIDR(this->GetIPString(), c->GetHost(), NULL) &&
1118                             !InspIRCd::MatchCIDR(this->host, c->GetHost(), NULL))
1119                         {
1120                                 ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "No host match (for %s)", c->GetHost().c_str());
1121                                 continue;
1122                         }
1123
1124                         /*
1125                          * deny change if change will take class over the limit check it HERE, not after we found a matching class,
1126                          * because we should attempt to find another class if this one doesn't match us. -- w00t
1127                          */
1128                         if (c->limit && (c->GetReferenceCount() >= c->limit))
1129                         {
1130                                 ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "OOPS: Connect class limit (%lu) hit, denying", c->limit);
1131                                 continue;
1132                         }
1133
1134                         /* if it requires a port ... */
1135                         int port = c->config->getInt("port");
1136                         if (port)
1137                         {
1138                                 ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "Requires port (%d)", port);
1139
1140                                 /* and our port doesn't match, fail. */
1141                                 if (this->GetServerPort() != port)
1142                                         continue;
1143                         }
1144
1145                         if (regdone && !c->config->getString("password").empty())
1146                         {
1147                                 if (!ServerInstance->PassCompare(this, c->config->getString("password"), password, c->config->getString("hash")))
1148                                 {
1149                                         ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "Bad password, skipping");
1150                                         continue;
1151                                 }
1152                         }
1153
1154                         /* we stop at the first class that meets ALL critera. */
1155                         found = c;
1156                         break;
1157                 }
1158         }
1159
1160         /*
1161          * Okay, assuming we found a class that matches.. switch us into that class, keeping refcounts up to date.
1162          */
1163         if (found)
1164         {
1165                 MyClass = found;
1166         }
1167 }
1168
1169 void User::PurgeEmptyChannels()
1170 {
1171         // firstly decrement the count on each channel
1172         for (User::ChanList::iterator i = this->chans.begin(); i != this->chans.end(); )
1173         {
1174                 Channel* c = (*i)->chan;
1175                 ++i;
1176                 c->DelUser(this);
1177         }
1178
1179         this->UnOper();
1180 }
1181
1182 const std::string& FakeUser::GetFullHost()
1183 {
1184         if (!ServerInstance->Config->HideWhoisServer.empty())
1185                 return ServerInstance->Config->HideWhoisServer;
1186         return server->GetName();
1187 }
1188
1189 const std::string& FakeUser::GetFullRealHost()
1190 {
1191         if (!ServerInstance->Config->HideWhoisServer.empty())
1192                 return ServerInstance->Config->HideWhoisServer;
1193         return server->GetName();
1194 }
1195
1196 ConnectClass::ConnectClass(ConfigTag* tag, char t, const std::string& mask)
1197         : config(tag), type(t), fakelag(true), name("unnamed"), registration_timeout(0), host(mask),
1198         pingtime(0), softsendqmax(0), hardsendqmax(0), recvqmax(0),
1199         penaltythreshold(0), commandrate(0), maxlocal(0), maxglobal(0), maxconnwarn(true), maxchans(ServerInstance->Config->MaxChans),
1200         limit(0), resolvehostnames(true)
1201 {
1202 }
1203
1204 ConnectClass::ConnectClass(ConfigTag* tag, char t, const std::string& mask, const ConnectClass& parent)
1205         : config(tag), type(t), fakelag(parent.fakelag), name("unnamed"),
1206         registration_timeout(parent.registration_timeout), host(mask), pingtime(parent.pingtime),
1207         softsendqmax(parent.softsendqmax), hardsendqmax(parent.hardsendqmax), recvqmax(parent.recvqmax),
1208         penaltythreshold(parent.penaltythreshold), commandrate(parent.commandrate),
1209         maxlocal(parent.maxlocal), maxglobal(parent.maxglobal), maxconnwarn(parent.maxconnwarn), maxchans(parent.maxchans),
1210         limit(parent.limit), resolvehostnames(parent.resolvehostnames)
1211 {
1212 }
1213
1214 void ConnectClass::Update(const ConnectClass* src)
1215 {
1216         config = src->config;
1217         type = src->type;
1218         fakelag = src->fakelag;
1219         name = src->name;
1220         registration_timeout = src->registration_timeout;
1221         host = src->host;
1222         pingtime = src->pingtime;
1223         softsendqmax = src->softsendqmax;
1224         hardsendqmax = src->hardsendqmax;
1225         recvqmax = src->recvqmax;
1226         penaltythreshold = src->penaltythreshold;
1227         commandrate = src->commandrate;
1228         maxlocal = src->maxlocal;
1229         maxglobal = src->maxglobal;
1230         maxconnwarn = src->maxconnwarn;
1231         maxchans = src->maxchans;
1232         limit = src->limit;
1233         resolvehostnames = src->resolvehostnames;
1234 }