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 <stdarg.h>
  28 #include "socketengine.h"
  29 #include "xline.h"
  30 #include "bancache.h"
  31 #include "commands/cmd_whowas.h"
  32
  33 already_sent_t LocalUser::already_sent_id = 0;
  34
  35 std::string User::ProcessNoticeMasks(const char *sm)
  36 {
  37         bool adding = true, oldadding = false;
  38         const char *c = sm;
  39         std::string output;
  40
  41         while (c && *c)
  42         {
  43                 switch (*c)
  44                 {
  45                         case '+':
  46                                 adding = true;
  47                         break;
  48                         case '-':
  49                                 adding = false;
  50                         break;
  51                         case '*':
  52                                 for (unsigned char d = 'a'; d <= 'z'; d++)
  53                                 {
  54                                         if (!ServerInstance->SNO->masks[d - 'a'].Description.empty())
  55                                         {
  56                                                 if ((!IsNoticeMaskSet(d) && adding) || (IsNoticeMaskSet(d) && !adding))
  57                                                 {
  58                                                         if ((oldadding != adding) || (!output.length()))
  59                                                                 output += (adding ? '+' : '-');
  60
  61                                                         this->SetNoticeMask(d, adding);
  62
  63                                                         output += d;
  64                                                 }
  65                                                 oldadding = adding;
  66                                                 char u = toupper(d);
  67                                                 if ((!IsNoticeMaskSet(u) && adding) || (IsNoticeMaskSet(u) && !adding))
  68                                                 {
  69                                                         if ((oldadding != adding) || (!output.length()))
  70                                                                 output += (adding ? '+' : '-');
  71
  72                                                         this->SetNoticeMask(u, adding);
  73
  74                                                         output += u;
  75                                                 }
  76                                                 oldadding = adding;
  77                                         }
  78                                 }
  79                         break;
  80                         default:
  81                                 if (isalpha(*c))
  82                                 {
  83                                         if ((!IsNoticeMaskSet(*c) && adding) || (IsNoticeMaskSet(*c) && !adding))
  84                                         {
  85                                                 if ((oldadding != adding) || (!output.length()))
  86                                                         output += (adding ? '+' : '-');
  87
  88                                                 this->SetNoticeMask(*c, adding);
  89
  90                                                 output += *c;
  91                                         }
  92                                 }
  93                                 else
  94                                         this->WriteNumeric(ERR_UNKNOWNSNOMASK, "%s %c :is unknown snomask char to me", this->nick.c_str(), *c);
  95
  96                                 oldadding = adding;
  97                         break;
  98                 }
  99
 100                 c++;
 101         }
 102
 103         std::string s = this->FormatNoticeMasks();
 104         if (s.length() == 0)
 105         {
 106                 this->modes[UM_SNOMASK] = false;
 107         }
 108
 109         return output;
 110 }
 111
 112 void LocalUser::StartDNSLookup()
 113 {
 114         try
 115         {
 116                 bool cached = false;
 117                 UserResolver *res_reverse;
 118
 119                 QueryType resolvtype = this->client_sa.sa.sa_family == AF_INET6 ? DNS_QUERY_PTR6 : DNS_QUERY_PTR4;
 120                 res_reverse = new UserResolver(this, this->GetIPString(), resolvtype, cached);
 121
 122                 ServerInstance->AddResolver(res_reverse, cached);
 123         }
 124         catch (CoreException& e)
 125         {
 126                 ServerInstance->Logs->Log("USERS", DEBUG,"Error in resolver: %s",e.GetReason());
 127                 dns_done = true;
 128                 ServerInstance->stats->statsDnsBad++;
 129         }
 130 }
 131
 132 bool User::IsNoticeMaskSet(unsigned char sm)
 133 {
 134         if (!isalpha(sm))
 135                 return false;
 136         return (snomasks[sm-65]);
 137 }
 138
 139 void User::SetNoticeMask(unsigned char sm, bool value)
 140 {
 141         if (!isalpha(sm))
 142                 return;
 143         snomasks[sm-65] = value;
 144 }
 145
 146 const char* User::FormatNoticeMasks()
 147 {
 148         static char data[MAXBUF];
 149         int offset = 0;
 150
 151         for (int n = 0; n < 64; n++)
 152         {
 153                 if (snomasks[n])
 154                         data[offset++] = n+65;
 155         }
 156
 157         data[offset] = 0;
 158         return data;
 159 }
 160
 161 bool User::IsModeSet(unsigned char m)
 162 {
 163         if (!isalpha(m))
 164                 return false;
 165         return (modes[m-65]);
 166 }
 167
 168 void User::SetMode(unsigned char m, bool value)
 169 {
 170         if (!isalpha(m))
 171                 return;
 172         modes[m-65] = value;
 173 }
 174
 175 const char* User::FormatModes(bool showparameters)
 176 {
 177         static char data[MAXBUF];
 178         std::string params;
 179         int offset = 0;
 180
 181         for (unsigned char n = 0; n < 64; n++)
 182         {
 183                 if (modes[n])
 184                 {
 185                         data[offset++] = n + 65;
 186                         ModeHandler* mh = ServerInstance->Modes->FindMode(n + 65, MODETYPE_USER);
 187                         if (showparameters && mh && mh->GetNumParams(true))
 188                         {
 189                                 std::string p = mh->GetUserParameter(this);
 190                                 if (p.length())
 191                                         params.append(" ").append(p);
 192                         }
 193                 }
 194         }
 195         data[offset] = 0;
 196         strlcat(data, params.c_str(), MAXBUF);
 197         return data;
 198 }
 199
 200 User::User(const std::string &uid, const std::string& sid, int type)
 201         : uuid(uid), server(sid), usertype(type)
 202 {
 203         age = ServerInstance->Time();
 204         signon = idle_lastmsg = 0;
 205         registered = 0;
 206         quietquit = quitting = exempt = dns_done = false;
 207         quitting_sendq = false;
 208         client_sa.sa.sa_family = AF_UNSPEC;
 209
 210         ServerInstance->Logs->Log("USERS", DEBUG, "New UUID for user: %s", uuid.c_str());
 211
 212         user_hash::iterator finduuid = ServerInstance->Users->uuidlist->find(uuid);
 213         if (finduuid == ServerInstance->Users->uuidlist->end())
 214                 (*ServerInstance->Users->uuidlist)[uuid] = this;
 215         else
 216                 throw CoreException("Duplicate UUID "+std::string(uuid)+" in User constructor");
 217 }
 218
 219 LocalUser::LocalUser(int myfd, irc::sockets::sockaddrs* client, irc::sockets::sockaddrs* servaddr)
 220         : User(ServerInstance->GetUID(), ServerInstance->Config->ServerName, USERTYPE_LOCAL), eh(this),
 221         localuseriter(ServerInstance->Users->local_users.end()),
 222         bytes_in(0), bytes_out(0), cmds_in(0), cmds_out(0), nping(0), CommandFloodPenalty(0),
 223         already_sent(0)
 224 {
 225         ident = "unknown";
 226         lastping = 0;
 227         eh.SetFd(myfd);
 228         memcpy(&client_sa, client, sizeof(irc::sockets::sockaddrs));
 229         memcpy(&server_sa, servaddr, sizeof(irc::sockets::sockaddrs));
 230         dhost = host = GetIPString();
 231 }
 232
 233 User::~User()
 234 {
 235         if (ServerInstance->Users->uuidlist->find(uuid) != ServerInstance->Users->uuidlist->end())
 236                 ServerInstance->Logs->Log("USERS", DEFAULT, "User destructor for %s called without cull", uuid.c_str());
 237 }
 238
 239 const std::string& User::MakeHost()
 240 {
 241         if (!this->cached_makehost.empty())
 242                 return this->cached_makehost;
 243
 244         char nhost[MAXBUF];
 245         /* This is much faster than snprintf */
 246         char* t = nhost;
 247         for(const char* n = ident.c_str(); *n; n++)
 248                 *t++ = *n;
 249         *t++ = '@';
 250         for(const char* n = host.c_str(); *n; n++)
 251                 *t++ = *n;
 252         *t = 0;
 253
 254         this->cached_makehost.assign(nhost);
 255
 256         return this->cached_makehost;
 257 }
 258
 259 const std::string& User::MakeHostIP()
 260 {
 261         if (!this->cached_hostip.empty())
 262                 return this->cached_hostip;
 263
 264         char ihost[MAXBUF];
 265         /* This is much faster than snprintf */
 266         char* t = ihost;
 267         for(const char* n = ident.c_str(); *n; n++)
 268                 *t++ = *n;
 269         *t++ = '@';
 270         for(const char* n = this->GetIPString().c_str(); *n; n++)
 271                 *t++ = *n;
 272         *t = 0;
 273
 274         this->cached_hostip = ihost;
 275
 276         return this->cached_hostip;
 277 }
 278
 279 const std::string& User::GetFullHost()
 280 {
 281         if (!this->cached_fullhost.empty())
 282                 return this->cached_fullhost;
 283
 284         char result[MAXBUF];
 285         char* t = result;
 286         for(const char* n = nick.c_str(); *n; n++)
 287                 *t++ = *n;
 288         *t++ = '!';
 289         for(const char* n = ident.c_str(); *n; n++)
 290                 *t++ = *n;
 291         *t++ = '@';
 292         for(const char* n = dhost.c_str(); *n; n++)
 293                 *t++ = *n;
 294         *t = 0;
 295
 296         this->cached_fullhost = result;
 297
 298         return this->cached_fullhost;
 299 }
 300
 301 char* User::MakeWildHost()
 302 {
 303         static char nresult[MAXBUF];
 304         char* t = nresult;
 305         *t++ = '*';     *t++ = '!';
 306         *t++ = '*';     *t++ = '@';
 307         for(const char* n = dhost.c_str(); *n; n++)
 308                 *t++ = *n;
 309         *t = 0;
 310         return nresult;
 311 }
 312
 313 const std::string& User::GetFullRealHost()
 314 {
 315         if (!this->cached_fullrealhost.empty())
 316                 return this->cached_fullrealhost;
 317
 318         char fresult[MAXBUF];
 319         char* t = fresult;
 320         for(const char* n = nick.c_str(); *n; n++)
 321                 *t++ = *n;
 322         *t++ = '!';
 323         for(const char* n = ident.c_str(); *n; n++)
 324                 *t++ = *n;
 325         *t++ = '@';
 326         for(const char* n = host.c_str(); *n; n++)
 327                 *t++ = *n;
 328         *t = 0;
 329
 330         this->cached_fullrealhost = fresult;
 331
 332         return this->cached_fullrealhost;
 333 }
 334
 335 bool LocalUser::IsInvited(const irc::string &channel)
 336 {
 337         Channel* chan = ServerInstance->FindChan(channel.c_str());
 338         if (!chan)
 339                 return false;
 340
 341         return (Invitation::Find(chan, this) != NULL);
 342 }
 343
 344 InviteList& LocalUser::GetInviteList()
 345 {
 346         RemoveExpiredInvites();
 347         return invites;
 348 }
 349
 350 void LocalUser::InviteTo(const irc::string &channel, time_t invtimeout)
 351 {
 352         Channel* chan = ServerInstance->FindChan(channel.c_str());
 353         if (chan)
 354                 Invitation::Create(chan, this, invtimeout);
 355 }
 356
 357 void LocalUser::RemoveInvite(const irc::string &channel)
 358 {
 359         Channel* chan = ServerInstance->FindChan(channel.c_str());
 360         if (chan)
 361         {
 362                 Invitation* inv = Invitation::Find(chan, this);
 363                 if (inv)
 364                 {
 365                         inv->cull();
 366                         delete inv;
 367                 }
 368         }
 369 }
 370
 371 void LocalUser::RemoveExpiredInvites()
 372 {
 373         Invitation::Find(NULL, this);
 374 }
 375
 376 bool User::HasModePermission(unsigned char, ModeType)
 377 {
 378         return true;
 379 }
 380
 381 bool LocalUser::HasModePermission(unsigned char mode, ModeType type)
 382 {
 383         if (!IS_OPER(this))
 384                 return false;
 385
 386         if (mode < 'A' || mode > ('A' + 64)) return false;
 387
 388         return ((type == MODETYPE_USER ? oper->AllowedUserModes : oper->AllowedChanModes))[(mode - 'A')];
 389
 390 }
 391 /*
 392  * users on remote servers can completely bypass all permissions based checks.
 393  * This prevents desyncs when one server has different type/class tags to another.
 394  * That having been said, this does open things up to the possibility of source changes
 395  * allowing remote kills, etc - but if they have access to the src, they most likely have
 396  * access to the conf - so it's an end to a means either way.
 397  */
 398 bool User::HasPermission(const std::string&)
 399 {
 400         return true;
 401 }
 402
 403 bool LocalUser::HasPermission(const std::string &command)
 404 {
 405         // are they even an oper at all?
 406         if (!IS_OPER(this))
 407         {
 408                 return false;
 409         }
 410
 411         if (oper->AllowedOperCommands.find(command) != oper->AllowedOperCommands.end())
 412                 return true;
 413         else if (oper->AllowedOperCommands.find("*") != oper->AllowedOperCommands.end())
 414                 return true;
 415
 416         return false;
 417 }
 418
 419 bool User::HasPrivPermission(const std::string &privstr, bool noisy)
 420 {
 421         return true;
 422 }
 423
 424 bool LocalUser::HasPrivPermission(const std::string &privstr, bool noisy)
 425 {
 426         if (!IS_OPER(this))
 427         {
 428                 if (noisy)
 429                         this->WriteServ("NOTICE %s :You are not an oper", this->nick.c_str());
 430                 return false;
 431         }
 432
 433         if (oper->AllowedPrivs.find(privstr) != oper->AllowedPrivs.end())
 434         {
 435                 return true;
 436         }
 437         else if (oper->AllowedPrivs.find("*") != oper->AllowedPrivs.end())
 438         {
 439                 return true;
 440         }
 441
 442         if (noisy)
 443                 this->WriteServ("NOTICE %s :Oper type %s does not have access to priv %s", this->nick.c_str(), oper->NameStr(), privstr.c_str());
 444         return false;
 445 }
 446
 447 void UserIOHandler::OnDataReady()
 448 {
 449         if (user->quitting)
 450                 return;
 451
 452         if (recvq.length() > user->MyClass->GetRecvqMax() && !user->HasPrivPermission("users/flood/increased-buffers"))
 453         {
 454                 ServerInstance->Users->QuitUser(user, "RecvQ exceeded");
 455                 ServerInstance->SNO->WriteToSnoMask('a', "User %s RecvQ of %lu exceeds connect class maximum of %lu",
 456                         user->nick.c_str(), (unsigned long)recvq.length(), user->MyClass->GetRecvqMax());
 457         }
 458         unsigned long sendqmax = ULONG_MAX;
 459         if (!user->HasPrivPermission("users/flood/increased-buffers"))
 460                 sendqmax = user->MyClass->GetSendqSoftMax();
 461         unsigned long penaltymax = ULONG_MAX;
 462         if (!user->HasPrivPermission("users/flood/no-fakelag"))
 463                 penaltymax = user->MyClass->GetPenaltyThreshold() * 1000;
 464
 465         while (user->CommandFloodPenalty < penaltymax && getSendQSize() < sendqmax)
 466         {
 467                 std::string line;
 468                 line.reserve(MAXBUF);
 469                 std::string::size_type qpos = 0;
 470                 while (qpos < recvq.length())
 471                 {
 472                         char c = recvq[qpos++];
 473                         switch (c)
 474                         {
 475                         case '\0':
 476                                 c = ' ';
 477                                 break;
 478                         case '\r':
 479                                 continue;
 480                         case '\n':
 481                                 goto eol_found;
 482                         }
 483                         if (line.length() < MAXBUF - 2)
 484                                 line.push_back(c);
 485                 }
 486                 // if we got here, the recvq ran out before we found a newline
 487                 return;
 488 eol_found:
 489                 // just found a newline. Terminate the string, and pull it out of recvq
 490                 recvq = recvq.substr(qpos);
 491
 492                 // TODO should this be moved to when it was inserted in recvq?
 493                 ServerInstance->stats->statsRecv += qpos;
 494                 user->bytes_in += qpos;
 495                 user->cmds_in++;
 496
 497                 ServerInstance->Parser->ProcessBuffer(line, user);
 498                 if (user->quitting)
 499                         return;
 500         }
 501         if (user->CommandFloodPenalty >= penaltymax && !user->MyClass->fakelag)
 502                 ServerInstance->Users->QuitUser(user, "Excess Flood");
 503 }
 504
 505 void UserIOHandler::AddWriteBuf(const std::string &data)
 506 {
 507         if (user->quitting_sendq)
 508                 return;
 509         if (!user->quitting && getSendQSize() + data.length() > user->MyClass->GetSendqHardMax() &&
 510                 !user->HasPrivPermission("users/flood/increased-buffers"))
 511         {
 512                 user->quitting_sendq = true;
 513                 ServerInstance->GlobalCulls.AddSQItem(user);
 514                 return;
 515         }
 516
 517         // We still want to append data to the sendq of a quitting user,
 518         // e.g. their ERROR message that says 'closing link'
 519
 520         WriteData(data);
 521 }
 522
 523 void UserIOHandler::OnError(BufferedSocketError)
 524 {
 525         ServerInstance->Users->QuitUser(user, getError());
 526 }
 527
 528 CullResult User::cull()
 529 {
 530         if (!quitting)
 531                 ServerInstance->Users->QuitUser(this, "Culled without QuitUser");
 532         PurgeEmptyChannels();
 533
 534         if (client_sa.sa.sa_family != AF_UNSPEC)
 535                 ServerInstance->Users->RemoveCloneCounts(this);
 536
 537         return Extensible::cull();
 538 }
 539
 540 CullResult LocalUser::cull()
 541 {
 542         // The iterator is initialized to local_users.end() in the constructor. It is
 543         // overwritten in UserManager::AddUser() with the real iterator so this check
 544         // is only a precaution currently.
 545         if (localuseriter != ServerInstance->Users->local_users.end())
 546                 ServerInstance->Users->local_users.erase(localuseriter);
 547
 548         ClearInvites();
 549         eh.cull();
 550         return User::cull();
 551 }
 552
 553 CullResult FakeUser::cull()
 554 {
 555         // Fake users don't quit, they just get culled.
 556         quitting = true;
 557         ServerInstance->Users->clientlist->erase(nick);
 558         ServerInstance->Users->uuidlist->erase(uuid);
 559         return User::cull();
 560 }
 561
 562 void User::Oper(OperInfo* info)
 563 {
 564         if (this->IsModeSet('o'))
 565                 this->UnOper();
 566
 567         this->modes[UM_OPERATOR] = 1;
 568         this->oper = info;
 569         this->WriteServ("MODE %s :+o", this->nick.c_str());
 570         FOREACH_MOD(I_OnOper, OnOper(this, info->name));
 571
 572         std::string opername;
 573         if (info->oper_block)
 574                 opername = info->oper_block->getString("name");
 575
 576         if (IS_LOCAL(this))
 577         {
 578                 LocalUser* l = IS_LOCAL(this);
 579                 std::string vhost = oper->getConfig("vhost");
 580                 if (!vhost.empty())
 581                         l->ChangeDisplayedHost(vhost.c_str());
 582                 std::string opClass = oper->getConfig("class");
 583                 if (!opClass.empty())
 584                         l->SetClass(opClass);
 585         }
 586
 587         ServerInstance->SNO->WriteToSnoMask('o',"%s (%s@%s) is now an IRC operator of type %s (using oper '%s')",
 588                 nick.c_str(), ident.c_str(), host.c_str(), oper->NameStr(), opername.c_str());
 589         this->WriteNumeric(381, "%s :You are now %s %s", nick.c_str(), strchr("aeiouAEIOU", oper->name[0]) ? "an" : "a", oper->NameStr());
 590
 591         ServerInstance->Logs->Log("OPER", DEFAULT, "%s opered as type: %s", GetFullRealHost().c_str(), oper->NameStr());
 592         ServerInstance->Users->all_opers.push_back(this);
 593
 594         // Expand permissions from config for faster lookup
 595         if (IS_LOCAL(this))
 596                 oper->init();
 597
 598         FOREACH_MOD(I_OnPostOper,OnPostOper(this, oper->name, opername));
 599 }
 600
 601 void OperInfo::init()
 602 {
 603         AllowedOperCommands.clear();
 604         AllowedPrivs.clear();
 605         AllowedUserModes.reset();
 606         AllowedChanModes.reset();
 607         AllowedUserModes['o' - 'A'] = true; // Call me paranoid if you want.
 608
 609         for(std::vector<reference<ConfigTag> >::iterator iter = class_blocks.begin(); iter != class_blocks.end(); ++iter)
 610         {
 611                 ConfigTag* tag = *iter;
 612                 std::string mycmd, mypriv;
 613                 /* Process commands */
 614                 irc::spacesepstream CommandList(tag->getString("commands"));
 615                 while (CommandList.GetToken(mycmd))
 616                 {
 617                         AllowedOperCommands.insert(mycmd);
 618                 }
 619
 620                 irc::spacesepstream PrivList(tag->getString("privs"));
 621                 while (PrivList.GetToken(mypriv))
 622                 {
 623                         AllowedPrivs.insert(mypriv);
 624                 }
 625
 626                 std::string modes = tag->getString("usermodes");
 627                 for (std::string::const_iterator c = modes.begin(); c != modes.end(); ++c)
 628                 {
 629                         if (*c == '*')
 630                         {
 631                                 this->AllowedUserModes.set();
 632                         }
 633                         else if (*c >= 'A' && *c < 'z')
 634                         {
 635                                 this->AllowedUserModes[*c - 'A'] = true;
 636                         }
 637                 }
 638
 639                 modes = tag->getString("chanmodes");
 640                 for (std::string::const_iterator c = modes.begin(); c != modes.end(); ++c)
 641                 {
 642                         if (*c == '*')
 643                         {
 644                                 this->AllowedChanModes.set();
 645                         }
 646                         else if (*c >= 'A' && *c < 'z')
 647                         {
 648                                 this->AllowedChanModes[*c - 'A'] = true;
 649                         }
 650                 }
 651         }
 652 }
 653
 654 void User::UnOper()
 655 {
 656         if (!IS_OPER(this))
 657                 return;
 658
 659         /*
 660          * unset their oper type (what IS_OPER checks).
 661          * note, order is important - this must come before modes as -o attempts
 662          * to call UnOper. -- w00t
 663          */
 664         oper = NULL;
 665
 666
 667         /* Remove all oper only modes from the user when the deoper - Bug #466*/
 668         std::string moderemove("-");
 669
 670         for (unsigned char letter = 'A'; letter <= 'z'; letter++)
 671         {
 672                 ModeHandler* mh = ServerInstance->Modes->FindMode(letter, MODETYPE_USER);
 673                 if (mh && mh->NeedsOper())
 674                         moderemove += letter;
 675         }
 676
 677
 678         std::vector<std::string> parameters;
 679         parameters.push_back(this->nick);
 680         parameters.push_back(moderemove);
 681
 682         ServerInstance->Parser->CallHandler("MODE", parameters, this);
 683
 684         /* remove the user from the oper list. Will remove multiple entries as a safeguard against bug #404 */
 685         ServerInstance->Users->all_opers.remove(this);
 686
 687         this->modes[UM_OPERATOR] = 0;
 688 }
 689
 690 /* adds or updates an entry in the whowas list */
 691 void User::AddToWhoWas()
 692 {
 693         Module* whowas = ServerInstance->Modules->Find("cmd_whowas.so");
 694         if (whowas)
 695         {
 696                 WhowasRequest req(NULL, whowas, WhowasRequest::WHOWAS_ADD);
 697                 req.user = this;
 698                 req.Send();
 699         }
 700 }
 701
 702 /*
 703  * Check class restrictions
 704  */
 705 void LocalUser::CheckClass()
 706 {
 707         ConnectClass* a = this->MyClass;
 708
 709         if (!a)
 710         {
 711                 ServerInstance->Users->QuitUser(this, "Access denied by configuration");
 712                 return;
 713         }
 714         else if (a->type == CC_DENY)
 715         {
 716                 ServerInstance->Users->QuitUser(this, a->config->getString("reason", "Unauthorised connection"));
 717                 return;
 718         }
 719         else if ((a->GetMaxLocal()) && (ServerInstance->Users->LocalCloneCount(this) > a->GetMaxLocal()))
 720         {
 721                 ServerInstance->Users->QuitUser(this, "No more connections allowed from your host via this connect class (local)");
 722                 if (a->maxconnwarn)
 723                         ServerInstance->SNO->WriteToSnoMask('a', "WARNING: maximum LOCAL connections (%ld) exceeded for IP %s", a->GetMaxLocal(), this->GetIPString().c_str());
 724                 return;
 725         }
 726         else if ((a->GetMaxGlobal()) && (ServerInstance->Users->GlobalCloneCount(this) > a->GetMaxGlobal()))
 727         {
 728                 ServerInstance->Users->QuitUser(this, "No more connections allowed from your host via this connect class (global)");
 729                 if (a->maxconnwarn)
 730                         ServerInstance->SNO->WriteToSnoMask('a', "WARNING: maximum GLOBAL connections (%ld) exceeded for IP %s", a->GetMaxGlobal(), this->GetIPString().c_str());
 731                 return;
 732         }
 733
 734         this->nping = ServerInstance->Time() + a->GetPingTime() + ServerInstance->Config->dns_timeout;
 735 }
 736
 737 bool User::CheckLines(bool doZline)
 738 {
 739         const char* check[] = { "G" , "K", (doZline) ? "Z" : NULL, NULL };
 740
 741         if (!this->exempt)
 742         {
 743                 for (int n = 0; check[n]; ++n)
 744                 {
 745                         XLine *r = ServerInstance->XLines->MatchesLine(check[n], this);
 746
 747                         if (r)
 748                         {
 749                                 r->Apply(this);
 750                                 return true;
 751                         }
 752                 }
 753         }
 754
 755         return false;
 756 }
 757
 758 void LocalUser::FullConnect()
 759 {
 760         ServerInstance->stats->statsConnects++;
 761         this->idle_lastmsg = ServerInstance->Time();
 762
 763         /*
 764          * You may be thinking "wtf, we checked this in User::AddClient!" - and yes, we did, BUT.
 765          * At the time AddClient is called, we don't have a resolved host, by here we probably do - which
 766          * may put the user into a totally seperate class with different restrictions! so we *must* check again.
 767          * Don't remove this! -- w00t
 768          */
 769         MyClass = NULL;
 770         SetClass();
 771         CheckClass();
 772         CheckLines();
 773
 774         if (quitting)
 775                 return;
 776
 777         this->WriteNumeric(RPL_WELCOME, "%s :Welcome to the %s IRC Network %s",this->nick.c_str(), ServerInstance->Config->Network.c_str(), GetFullRealHost().c_str());
 778         this->WriteNumeric(RPL_YOURHOSTIS, "%s :Your host is %s, running version %s",this->nick.c_str(),ServerInstance->Config->ServerName.c_str(),BRANCH);
 779         this->WriteNumeric(RPL_SERVERCREATED, "%s :This server was created %s %s", this->nick.c_str(), __TIME__, __DATE__);
 780
 781         std::string umlist = ServerInstance->Modes->UserModeList();
 782         std::string cmlist = ServerInstance->Modes->ChannelModeList();
 783         std::string pmlist = ServerInstance->Modes->ParaModeList();
 784         this->WriteNumeric(RPL_SERVERVERSION, "%s %s %s %s %s %s", this->nick.c_str(), ServerInstance->Config->ServerName.c_str(), BRANCH, umlist.c_str(), cmlist.c_str(), pmlist.c_str());
 785
 786         ServerInstance->Config->Send005(this);
 787         this->WriteNumeric(RPL_YOURUUID, "%s %s :your unique ID", this->nick.c_str(), this->uuid.c_str());
 788
 789         /* Now registered */
 790         if (ServerInstance->Users->unregistered_count)
 791                 ServerInstance->Users->unregistered_count--;
 792
 793         /* Trigger MOTD and LUSERS output, give modules a chance too */
 794         ModResult MOD_RESULT;
 795         std::string command("LUSERS");
 796         std::vector<std::string> parameters;
 797         FIRST_MOD_RESULT(OnPreCommand, MOD_RESULT, (command, parameters, this, true, command));
 798         if (!MOD_RESULT)
 799                 ServerInstance->Parser->CallHandler(command, parameters, this);
 800
 801         MOD_RESULT = MOD_RES_PASSTHRU;
 802         command = "MOTD";
 803         FIRST_MOD_RESULT(OnPreCommand, MOD_RESULT, (command, parameters, this, true, command));
 804         if (!MOD_RESULT)
 805                 ServerInstance->Parser->CallHandler(command, parameters, this);
 806
 807         if (ServerInstance->Config->RawLog)
 808                 WriteServ("PRIVMSG %s :*** Raw I/O logging is enabled on this server. All messages, passwords, and commands are being recorded.", nick.c_str());
 809
 810         /*
 811          * We don't set REG_ALL until triggering OnUserConnect, so some module events don't spew out stuff
 812          * for a user that doesn't exist yet.
 813          */
 814         FOREACH_MOD(I_OnUserConnect,OnUserConnect(this));
 815
 816         this->registered = REG_ALL;
 817
 818         FOREACH_MOD(I_OnPostConnect,OnPostConnect(this));
 819
 820         ServerInstance->SNO->WriteToSnoMask('c',"Client connecting on port %d (class %s): %s (%s) [%s]",
 821                 this->GetServerPort(), this->MyClass->name.c_str(), GetFullRealHost().c_str(), this->GetIPString().c_str(), this->fullname.c_str());
 822         ServerInstance->Logs->Log("BANCACHE", DEBUG, "BanCache: Adding NEGATIVE hit for " + this->GetIPString());
 823         ServerInstance->BanCache->AddHit(this->GetIPString(), "", "");
 824         // reset the flood penalty (which could have been raised due to things like auto +x)
 825         CommandFloodPenalty = 0;
 826 }
 827
 828 void User::InvalidateCache()
 829 {
 830         /* Invalidate cache */
 831         cached_fullhost.clear();
 832         cached_hostip.clear();
 833         cached_makehost.clear();
 834         cached_fullrealhost.clear();
 835 }
 836
 837 bool User::ChangeNick(const std::string& newnick, bool force)
 838 {
 839         ModResult MOD_RESULT;
 840
 841         if (force)
 842                 ServerInstance->NICKForced.set(this, 1);
 843         FIRST_MOD_RESULT(OnUserPreNick, MOD_RESULT, (this, newnick));
 844         ServerInstance->NICKForced.set(this, 0);
 845
 846         if (MOD_RESULT == MOD_RES_DENY)
 847         {
 848                 ServerInstance->stats->statsCollisions++;
 849                 return false;
 850         }
 851
 852         if (assign(newnick) == assign(nick))
 853         {
 854                 // case change, don't need to check Q:lines and such
 855                 // and, if it's identical including case, we can leave right now
 856                 if (newnick == nick)
 857                         return true;
 858         }
 859         else
 860         {
 861                 /*
 862                  * Don't check Q:Lines if it's a server-enforced change, just on the off-chance some fucking *moron*
 863                  * tries to Q:Line SIDs, also, this means we just get our way period, as it really should be.
 864                  * Thanks Kein for finding this. -- w00t
 865                  *
 866                  * Also don't check Q:Lines for remote nickchanges, they should have our Q:Lines anyway to enforce themselves.
 867                  *              -- w00t
 868                  */
 869                 if (IS_LOCAL(this) && !force)
 870                 {
 871                         XLine* mq = ServerInstance->XLines->MatchesLine("Q",newnick);
 872                         if (mq)
 873                         {
 874                                 if (this->registered == REG_ALL)
 875                                 {
 876                                         ServerInstance->SNO->WriteGlobalSno('a', "Q-Lined nickname %s from %s: %s",
 877                                                 newnick.c_str(), GetFullRealHost().c_str(), mq->reason.c_str());
 878                                 }
 879                                 this->WriteNumeric(432, "%s %s :Invalid nickname: %s",this->nick.c_str(), newnick.c_str(), mq->reason.c_str());
 880                                 return false;
 881                         }
 882
 883                         if (ServerInstance->Config->RestrictBannedUsers)
 884                         {
 885                                 for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
 886                                 {
 887                                         Channel *chan = *i;
 888                                         if (chan->GetPrefixValue(this) < VOICE_VALUE && chan->IsBanned(this))
 889                                         {
 890                                                 this->WriteNumeric(404, "%s %s :Cannot send to channel (you're banned)", this->nick.c_str(), chan->name.c_str());
 891                                                 return false;
 892                                         }
 893                                 }
 894                         }
 895                 }
 896
 897                 /*
 898                  * Uh oh.. if the nickname is in use, and it's not in use by the person using it (doh) --
 899                  * then we have a potential collide. Check whether someone else is camping on the nick
 900                  * (i.e. connect -> send NICK, don't send USER.) If they are camping, force-change the
 901                  * camper to their UID, and allow the incoming nick change.
 902                  *
 903                  * If the guy using the nick is already using it, tell the incoming nick change to gtfo,
 904                  * because the nick is already (rightfully) in use. -- w00t
 905                  */
 906                 User* InUse = ServerInstance->FindNickOnly(newnick);
 907                 if (InUse && (InUse != this))
 908                 {
 909                         if (InUse->registered != REG_ALL)
 910                         {
 911                                 /* force the camper to their UUID, and ask them to re-send a NICK. */
 912                                 InUse->WriteTo(InUse, "NICK %s", InUse->uuid.c_str());
 913                                 InUse->WriteNumeric(433, "%s %s :Nickname overruled.", InUse->nick.c_str(), InUse->nick.c_str());
 914
 915                                 ServerInstance->Users->clientlist->erase(InUse->nick);
 916                                 (*(ServerInstance->Users->clientlist))[InUse->uuid] = InUse;
 917
 918                                 InUse->nick = InUse->uuid;
 919                                 InUse->InvalidateCache();
 920                                 InUse->registered &= ~REG_NICK;
 921                         }
 922                         else
 923                         {
 924                                 /* No camping, tell the incoming user  to stop trying to change nick ;p */
 925                                 this->WriteNumeric(433, "%s %s :Nickname is already in use.", this->registered >= REG_NICK ? this->nick.c_str() : "*", newnick.c_str());
 926                                 return false;
 927                         }
 928                 }
 929         }
 930
 931         if (this->registered == REG_ALL)
 932                 this->WriteCommon("NICK %s",newnick.c_str());
 933         std::string oldnick = nick;
 934         nick = newnick;
 935
 936         InvalidateCache();
 937         ServerInstance->Users->clientlist->erase(oldnick);
 938         (*(ServerInstance->Users->clientlist))[newnick] = this;
 939
 940         if (registered == REG_ALL)
 941                 FOREACH_MOD(I_OnUserPostNick,OnUserPostNick(this,oldnick));
 942
 943         return true;
 944 }
 945
 946 int LocalUser::GetServerPort()
 947 {
 948         switch (this->server_sa.sa.sa_family)
 949         {
 950                 case AF_INET6:
 951                         return htons(this->server_sa.in6.sin6_port);
 952                 case AF_INET:
 953                         return htons(this->server_sa.in4.sin_port);
 954         }
 955         return 0;
 956 }
 957
 958 const std::string& User::GetIPString()
 959 {
 960         int port;
 961         if (cachedip.empty())
 962         {
 963                 irc::sockets::satoap(client_sa, cachedip, port);
 964                 /* IP addresses starting with a : on irc are a Bad Thing (tm) */
 965                 if (cachedip[0] == ':')
 966                         cachedip.insert(0,1,'0');
 967         }
 968
 969         return cachedip;
 970 }
 971
 972 irc::sockets::cidr_mask User::GetCIDRMask()
 973 {
 974         int range = 0;
 975         switch (client_sa.sa.sa_family)
 976         {
 977                 case AF_INET6:
 978                         range = ServerInstance->Config->c_ipv6_range;
 979                         break;
 980                 case AF_INET:
 981                         range = ServerInstance->Config->c_ipv4_range;
 982                         break;
 983         }
 984         return irc::sockets::cidr_mask(client_sa, range);
 985 }
 986
 987 bool User::SetClientIP(const char* sip, bool recheck_eline)
 988 {
 989         cachedip.clear();
 990         cached_hostip.clear();
 991         return irc::sockets::aptosa(sip, 0, client_sa);
 992 }
 993
 994 void User::SetClientIP(const irc::sockets::sockaddrs& sa, bool recheck_eline)
 995 {
 996         cachedip.clear();
 997         cached_hostip.clear();
 998         memcpy(&client_sa, &sa, sizeof(irc::sockets::sockaddrs));
 999 }
1000
1001 bool LocalUser::SetClientIP(const char* sip, bool recheck_eline)
1002 {
1003         irc::sockets::sockaddrs sa;
1004         if (!irc::sockets::aptosa(sip, 0, sa))
1005                 // Invalid
1006                 return false;
1007
1008         LocalUser::SetClientIP(sa, recheck_eline);
1009         return true;
1010 }
1011
1012 void LocalUser::SetClientIP(const irc::sockets::sockaddrs& sa, bool recheck_eline)
1013 {
1014         if (sa != client_sa)
1015         {
1016                 User::SetClientIP(sa);
1017                 if (recheck_eline)
1018                         this->exempt = (ServerInstance->XLines->MatchesLine("E", this) != NULL);
1019
1020                 FOREACH_MOD(I_OnSetUserIP,OnSetUserIP(this));
1021         }
1022 }
1023
1024 static std::string wide_newline("\r\n");
1025
1026 void User::Write(const std::string& text)
1027 {
1028 }
1029
1030 void User::Write(const char *text, ...)
1031 {
1032 }
1033
1034 void LocalUser::Write(const std::string& text)
1035 {
1036         if (!ServerInstance->SE->BoundsCheckFd(&eh))
1037                 return;
1038
1039         if (text.length() > MAXBUF - 2)
1040         {
1041                 // this should happen rarely or never. Crop the string at 512 and try again.
1042                 std::string try_again = text.substr(0, MAXBUF - 2);
1043                 Write(try_again);
1044                 return;
1045         }
1046
1047         ServerInstance->Logs->Log("USEROUTPUT", RAWIO, "C[%s] O %s", uuid.c_str(), text.c_str());
1048
1049         eh.AddWriteBuf(text);
1050         eh.AddWriteBuf(wide_newline);
1051
1052         ServerInstance->stats->statsSent += text.length() + 2;
1053         this->bytes_out += text.length() + 2;
1054         this->cmds_out++;
1055 }
1056
1057 /** Write()
1058  */
1059 void LocalUser::Write(const char *text, ...)
1060 {
1061         va_list argsPtr;
1062         char textbuffer[MAXBUF];
1063
1064         va_start(argsPtr, text);
1065         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1066         va_end(argsPtr);
1067
1068         this->Write(std::string(textbuffer));
1069 }
1070
1071 void User::WriteServ(const std::string& text)
1072 {
1073         this->Write(":%s %s",ServerInstance->Config->ServerName.c_str(),text.c_str());
1074 }
1075
1076 /** WriteServ()
1077  *  Same as Write(), except `text' is prefixed with `:server.name '.
1078  */
1079 void User::WriteServ(const char* text, ...)
1080 {
1081         va_list argsPtr;
1082         char textbuffer[MAXBUF];
1083
1084         va_start(argsPtr, text);
1085         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1086         va_end(argsPtr);
1087
1088         this->WriteServ(std::string(textbuffer));
1089 }
1090
1091
1092 void User::WriteNumeric(unsigned int numeric, const char* text, ...)
1093 {
1094         va_list argsPtr;
1095         char textbuffer[MAXBUF];
1096
1097         va_start(argsPtr, text);
1098         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1099         va_end(argsPtr);
1100
1101         this->WriteNumeric(numeric, std::string(textbuffer));
1102 }
1103
1104 void User::WriteNumeric(unsigned int numeric, const std::string &text)
1105 {
1106         char textbuffer[MAXBUF];
1107         ModResult MOD_RESULT;
1108
1109         FIRST_MOD_RESULT(OnNumeric, MOD_RESULT, (this, numeric, text));
1110
1111         if (MOD_RESULT == MOD_RES_DENY)
1112                 return;
1113
1114         snprintf(textbuffer,MAXBUF,":%s %03u %s",ServerInstance->Config->ServerName.c_str(), numeric, text.c_str());
1115         this->Write(std::string(textbuffer));
1116 }
1117
1118 void User::WriteFrom(User *user, const std::string &text)
1119 {
1120         char tb[MAXBUF];
1121
1122         snprintf(tb,MAXBUF,":%s %s",user->GetFullHost().c_str(),text.c_str());
1123
1124         this->Write(std::string(tb));
1125 }
1126
1127
1128 /* write text from an originating user to originating user */
1129
1130 void User::WriteFrom(User *user, const char* text, ...)
1131 {
1132         va_list argsPtr;
1133         char textbuffer[MAXBUF];
1134
1135         va_start(argsPtr, text);
1136         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1137         va_end(argsPtr);
1138
1139         this->WriteFrom(user, std::string(textbuffer));
1140 }
1141
1142
1143 /* write text to an destination user from a source user (e.g. user privmsg) */
1144
1145 void User::WriteTo(User *dest, const char *data, ...)
1146 {
1147         char textbuffer[MAXBUF];
1148         va_list argsPtr;
1149
1150         va_start(argsPtr, data);
1151         vsnprintf(textbuffer, MAXBUF, data, argsPtr);
1152         va_end(argsPtr);
1153
1154         this->WriteTo(dest, std::string(textbuffer));
1155 }
1156
1157 void User::WriteTo(User *dest, const std::string &data)
1158 {
1159         dest->WriteFrom(this, data);
1160 }
1161
1162 void User::WriteCommon(const char* text, ...)
1163 {
1164         char textbuffer[MAXBUF];
1165         va_list argsPtr;
1166
1167         if (this->registered != REG_ALL || quitting)
1168                 return;
1169
1170         int len = snprintf(textbuffer,MAXBUF,":%s ",this->GetFullHost().c_str());
1171
1172         va_start(argsPtr, text);
1173         vsnprintf(textbuffer + len, MAXBUF - len, text, argsPtr);
1174         va_end(argsPtr);
1175
1176         this->WriteCommonRaw(std::string(textbuffer), true);
1177 }
1178
1179 void User::WriteCommonExcept(const char* text, ...)
1180 {
1181         char textbuffer[MAXBUF];
1182         va_list argsPtr;
1183
1184         if (this->registered != REG_ALL || quitting)
1185                 return;
1186
1187         int len = snprintf(textbuffer,MAXBUF,":%s ",this->GetFullHost().c_str());
1188
1189         va_start(argsPtr, text);
1190         vsnprintf(textbuffer + len, MAXBUF - len, text, argsPtr);
1191         va_end(argsPtr);
1192
1193         this->WriteCommonRaw(std::string(textbuffer), false);
1194 }
1195
1196 void User::WriteCommonRaw(const std::string &line, bool include_self)
1197 {
1198         if (this->registered != REG_ALL || quitting)
1199                 return;
1200
1201         LocalUser::already_sent_id++;
1202
1203         UserChanList include_c(chans);
1204         std::map<User*,bool> exceptions;
1205
1206         exceptions[this] = include_self;
1207
1208         FOREACH_MOD(I_OnBuildNeighborList,OnBuildNeighborList(this, include_c, exceptions));
1209
1210         for (std::map<User*,bool>::iterator i = exceptions.begin(); i != exceptions.end(); ++i)
1211         {
1212                 LocalUser* u = IS_LOCAL(i->first);
1213                 if (u && !u->quitting)
1214                 {
1215                         u->already_sent = LocalUser::already_sent_id;
1216                         if (i->second)
1217                                 u->Write(line);
1218                 }
1219         }
1220         for (UCListIter v = include_c.begin(); v != include_c.end(); ++v)
1221         {
1222                 Channel* c = *v;
1223                 const UserMembList* ulist = c->GetUsers();
1224                 for (UserMembList::const_iterator i = ulist->begin(); i != ulist->end(); i++)
1225                 {
1226                         LocalUser* u = IS_LOCAL(i->first);
1227                         if (u && !u->quitting && u->already_sent != LocalUser::already_sent_id)
1228                         {
1229                                 u->already_sent = LocalUser::already_sent_id;
1230                                 u->Write(line);
1231                         }
1232                 }
1233         }
1234 }
1235
1236 void User::WriteCommonQuit(const std::string &normal_text, const std::string &oper_text)
1237 {
1238         char tb1[MAXBUF];
1239         char tb2[MAXBUF];
1240
1241         if (this->registered != REG_ALL)
1242                 return;
1243
1244         already_sent_t uniq_id = ++LocalUser::already_sent_id;
1245
1246         snprintf(tb1,MAXBUF,":%s QUIT :%s",this->GetFullHost().c_str(),normal_text.c_str());
1247         snprintf(tb2,MAXBUF,":%s QUIT :%s",this->GetFullHost().c_str(),oper_text.c_str());
1248         std::string out1 = tb1;
1249         std::string out2 = tb2;
1250
1251         UserChanList include_c(chans);
1252         std::map<User*,bool> exceptions;
1253
1254         FOREACH_MOD(I_OnBuildNeighborList,OnBuildNeighborList(this, include_c, exceptions));
1255
1256         for (std::map<User*,bool>::iterator i = exceptions.begin(); i != exceptions.end(); ++i)
1257         {
1258                 LocalUser* u = IS_LOCAL(i->first);
1259                 if (u && !u->quitting)
1260                 {
1261                         u->already_sent = uniq_id;
1262                         if (i->second)
1263                                 u->Write(IS_OPER(u) ? out2 : out1);
1264                 }
1265         }
1266         for (UCListIter v = include_c.begin(); v != include_c.end(); ++v)
1267         {
1268                 const UserMembList* ulist = (*v)->GetUsers();
1269                 for (UserMembList::const_iterator i = ulist->begin(); i != ulist->end(); i++)
1270                 {
1271                         LocalUser* u = IS_LOCAL(i->first);
1272                         if (u && !u->quitting && (u->already_sent != uniq_id))
1273                         {
1274                                 u->already_sent = uniq_id;
1275                                 u->Write(IS_OPER(u) ? out2 : out1);
1276                         }
1277                 }
1278         }
1279 }
1280
1281 void LocalUser::SendText(const std::string& line)
1282 {
1283         Write(line);
1284 }
1285
1286 void RemoteUser::SendText(const std::string& line)
1287 {
1288         ServerInstance->PI->PushToClient(this, line);
1289 }
1290
1291 void FakeUser::SendText(const std::string& line)
1292 {
1293 }
1294
1295 void User::SendText(const char *text, ...)
1296 {
1297         va_list argsPtr;
1298         char line[MAXBUF];
1299
1300         va_start(argsPtr, text);
1301         vsnprintf(line, MAXBUF, text, argsPtr);
1302         va_end(argsPtr);
1303
1304         SendText(std::string(line));
1305 }
1306
1307 void User::SendText(const std::string &LinePrefix, std::stringstream &TextStream)
1308 {
1309         char line[MAXBUF];
1310         int start_pos = LinePrefix.length();
1311         int pos = start_pos;
1312         memcpy(line, LinePrefix.data(), pos);
1313         std::string Word;
1314         while (TextStream >> Word)
1315         {
1316                 int len = Word.length();
1317                 if (pos + len + 12 > MAXBUF)
1318                 {
1319                         line[pos] = '\0';
1320                         SendText(std::string(line));
1321                         pos = start_pos;
1322                 }
1323                 line[pos] = ' ';
1324                 memcpy(line + pos + 1, Word.data(), len);
1325                 pos += len + 1;
1326         }
1327         line[pos] = '\0';
1328         SendText(std::string(line));
1329 }
1330
1331 /* return 0 or 1 depending if users u and u2 share one or more common channels
1332  * (used by QUIT, NICK etc which arent channel specific notices)
1333  *
1334  * The old algorithm in 1.0 for this was relatively inefficient, iterating over
1335  * the first users channels then the second users channels within the outer loop,
1336  * therefore it was a maximum of x*y iterations (upon returning 0 and checking
1337  * all possible iterations). However this new function instead checks against the
1338  * channel's userlist in the inner loop which is a std::map<User*,User*>
1339  * and saves us time as we already know what pointer value we are after.
1340  * Don't quote me on the maths as i am not a mathematician or computer scientist,
1341  * but i believe this algorithm is now x+(log y) maximum iterations instead.
1342  */
1343 bool User::SharesChannelWith(User *other)
1344 {
1345         if ((!other) || (this->registered != REG_ALL) || (other->registered != REG_ALL))
1346                 return false;
1347
1348         /* Outer loop */
1349         for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1350         {
1351                 /* Eliminate the inner loop (which used to be ~equal in size to the outer loop)
1352                  * by replacing it with a map::find which *should* be more efficient
1353                  */
1354                 if ((*i)->HasUser(other))
1355                         return true;
1356         }
1357         return false;
1358 }
1359
1360 bool User::ChangeName(const char* gecos)
1361 {
1362         if (!this->fullname.compare(gecos))
1363                 return true;
1364
1365         if (IS_LOCAL(this))
1366         {
1367                 ModResult MOD_RESULT;
1368                 FIRST_MOD_RESULT(OnChangeLocalUserGECOS, MOD_RESULT, (IS_LOCAL(this),gecos));
1369                 if (MOD_RESULT == MOD_RES_DENY)
1370                         return false;
1371                 FOREACH_MOD(I_OnChangeName,OnChangeName(this,gecos));
1372         }
1373         this->fullname.assign(gecos, 0, ServerInstance->Config->Limits.MaxGecos);
1374
1375         return true;
1376 }
1377
1378 void User::DoHostCycle(const std::string &quitline)
1379 {
1380         char buffer[MAXBUF];
1381
1382         if (!ServerInstance->Config->CycleHosts)
1383                 return;
1384
1385         already_sent_t silent_id = ++LocalUser::already_sent_id;
1386         already_sent_t seen_id = ++LocalUser::already_sent_id;
1387
1388         UserChanList include_c(chans);
1389         std::map<User*,bool> exceptions;
1390
1391         FOREACH_MOD(I_OnBuildNeighborList,OnBuildNeighborList(this, include_c, exceptions));
1392
1393         for (std::map<User*,bool>::iterator i = exceptions.begin(); i != exceptions.end(); ++i)
1394         {
1395                 LocalUser* u = IS_LOCAL(i->first);
1396                 if (u && !u->quitting)
1397                 {
1398                         if (i->second)
1399                         {
1400                                 u->already_sent = seen_id;
1401                                 u->Write(quitline);
1402                         }
1403                         else
1404                         {
1405                                 u->already_sent = silent_id;
1406                         }
1407                 }
1408         }
1409         for (UCListIter v = include_c.begin(); v != include_c.end(); ++v)
1410         {
1411                 Channel* c = *v;
1412                 snprintf(buffer, MAXBUF, ":%s JOIN %s", GetFullHost().c_str(), c->name.c_str());
1413                 std::string joinline(buffer);
1414                 Membership* memb = c->GetUser(this);
1415                 std::string modeline = memb->modes;
1416                 if (modeline.length() > 0)
1417                 {
1418                         for(unsigned int i=0; i < memb->modes.length(); i++)
1419                                 modeline.append(" ").append(nick);
1420                         snprintf(buffer, MAXBUF, ":%s MODE %s +%s",
1421                                 ServerInstance->Config->CycleHostsFromUser ? GetFullHost().c_str() : ServerInstance->Config->ServerName.c_str(),
1422                                 c->name.c_str(), modeline.c_str());
1423                         modeline = buffer;
1424                 }
1425
1426                 const UserMembList *ulist = c->GetUsers();
1427                 for (UserMembList::const_iterator i = ulist->begin(); i != ulist->end(); i++)
1428                 {
1429                         LocalUser* u = IS_LOCAL(i->first);
1430                         if (u == NULL || u == this)
1431                                 continue;
1432                         if (u->already_sent == silent_id)
1433                                 continue;
1434
1435                         if (u->already_sent != seen_id)
1436                         {
1437                                 u->Write(quitline);
1438                                 u->already_sent = seen_id;
1439                         }
1440                         u->Write(joinline);
1441                         if (modeline.length() > 0)
1442                                 u->Write(modeline);
1443                 }
1444         }
1445 }
1446
1447 bool User::ChangeDisplayedHost(const char* shost)
1448 {
1449         if (dhost == shost)
1450                 return true;
1451
1452         if (IS_LOCAL(this))
1453         {
1454                 ModResult MOD_RESULT;
1455                 FIRST_MOD_RESULT(OnChangeLocalUserHost, MOD_RESULT, (IS_LOCAL(this),shost));
1456                 if (MOD_RESULT == MOD_RES_DENY)
1457                         return false;
1458         }
1459
1460         FOREACH_MOD(I_OnChangeHost, OnChangeHost(this,shost));
1461
1462         std::string quitstr = ":" + GetFullHost() + " QUIT :Changing host";
1463
1464         /* Fix by Om: User::dhost is 65 long, this was truncating some long hosts */
1465         this->dhost.assign(shost, 0, 64);
1466
1467         this->InvalidateCache();
1468
1469         this->DoHostCycle(quitstr);
1470
1471         if (IS_LOCAL(this))
1472                 this->WriteNumeric(RPL_YOURDISPLAYEDHOST, "%s %s :is now your displayed host",this->nick.c_str(),this->dhost.c_str());
1473
1474         return true;
1475 }
1476
1477 bool User::ChangeIdent(const char* newident)
1478 {
1479         if (this->ident == newident)
1480                 return true;
1481
1482         FOREACH_MOD(I_OnChangeIdent, OnChangeIdent(this,newident));
1483
1484         std::string quitstr = ":" + GetFullHost() + " QUIT :Changing ident";
1485
1486         this->ident.assign(newident, 0, ServerInstance->Config->Limits.IdentMax);
1487
1488         this->InvalidateCache();
1489
1490         this->DoHostCycle(quitstr);
1491
1492         return true;
1493 }
1494
1495 void User::SendAll(const char* command, const char* text, ...)
1496 {
1497         char textbuffer[MAXBUF];
1498         char formatbuffer[MAXBUF];
1499         va_list argsPtr;
1500
1501         va_start(argsPtr, text);
1502         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1503         va_end(argsPtr);
1504
1505         snprintf(formatbuffer,MAXBUF,":%s %s $* :%s", this->GetFullHost().c_str(), command, textbuffer);
1506         std::string fmt = formatbuffer;
1507
1508         for (LocalUserList::const_iterator i = ServerInstance->Users->local_users.begin(); i != ServerInstance->Users->local_users.end(); i++)
1509         {
1510                 if ((*i)->registered == REG_ALL)
1511                         (*i)->Write(fmt);
1512         }
1513 }
1514
1515
1516 std::string User::ChannelList(User* source, bool spy)
1517 {
1518         std::string list;
1519
1520         for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1521         {
1522                 Channel* c = *i;
1523                 /* If the target is the sender, neither +p nor +s is set, or
1524                  * the channel contains the user, it is not a spy channel
1525                  */
1526                 if (spy != (source == this || !(c->IsModeSet('p') || c->IsModeSet('s')) || c->HasUser(source)))
1527                         list.append(c->GetPrefixChar(this)).append(c->name).append(" ");
1528         }
1529
1530         return list;
1531 }
1532
1533 void User::SplitChanList(User* dest, const std::string &cl)
1534 {
1535         std::string line;
1536         std::ostringstream prefix;
1537         std::string::size_type start, pos, length;
1538
1539         prefix << this->nick << " " << dest->nick << " :";
1540         line = prefix.str();
1541         int namelen = ServerInstance->Config->ServerName.length() + 6;
1542
1543         for (start = 0; (pos = cl.find(' ', start)) != std::string::npos; start = pos+1)
1544         {
1545                 length = (pos == std::string::npos) ? cl.length() : pos;
1546
1547                 if (line.length() + namelen + length - start > 510)
1548                 {
1549                         ServerInstance->SendWhoisLine(this, dest, 319, "%s", line.c_str());
1550                         line = prefix.str();
1551                 }
1552
1553                 if(pos == std::string::npos)
1554                 {
1555                         line.append(cl.substr(start, length - start));
1556                         break;
1557                 }
1558                 else
1559                 {
1560                         line.append(cl.substr(start, length - start + 1));
1561                 }
1562         }
1563
1564         if (line.length() != prefix.str().length())
1565         {
1566                 ServerInstance->SendWhoisLine(this, dest, 319, "%s", line.c_str());
1567         }
1568 }
1569
1570 /*
1571  * Sets a user's connection class.
1572  * If the class name is provided, it will be used. Otherwise, the class will be guessed using host/ip/ident/etc.
1573  * NOTE: If the <ALLOW> or <DENY> tag specifies an ip, and this user resolves,
1574  * then their ip will be taken as 'priority' anyway, so for example,
1575  * <connect allow="127.0.0.1"> will match joe!bloggs@localhost
1576  */
1577 void LocalUser::SetClass(const std::string &explicit_name)
1578 {
1579         ConnectClass *found = NULL;
1580
1581         ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Setting connect class for UID %s", this->uuid.c_str());
1582
1583         if (!explicit_name.empty())
1584         {
1585                 for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++)
1586                 {
1587                         ConnectClass* c = *i;
1588
1589                         if (explicit_name == c->name)
1590                         {
1591                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Explicitly set to %s", explicit_name.c_str());
1592                                 found = c;
1593                         }
1594                 }
1595         }
1596         else
1597         {
1598                 for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++)
1599                 {
1600                         ConnectClass* c = *i;
1601                         ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Checking %s", c->GetName().c_str());
1602
1603                         ModResult MOD_RESULT;
1604                         FIRST_MOD_RESULT(OnSetConnectClass, MOD_RESULT, (this,c));
1605                         if (MOD_RESULT == MOD_RES_DENY)
1606                                 continue;
1607                         if (MOD_RESULT == MOD_RES_ALLOW)
1608                         {
1609                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Class forced by module to %s", c->GetName().c_str());
1610                                 found = c;
1611                                 break;
1612                         }
1613
1614                         if (c->type == CC_NAMED)
1615                                 continue;
1616
1617                         bool regdone = (registered != REG_NONE);
1618                         if (c->config->getBool("registered", regdone) != regdone)
1619                                 continue;
1620
1621                         /* check if host matches.. */
1622                         if (!InspIRCd::MatchCIDR(this->GetIPString(), c->GetHost(), NULL) &&
1623                             !InspIRCd::MatchCIDR(this->host, c->GetHost(), NULL))
1624                         {
1625                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "No host match (for %s)", c->GetHost().c_str());
1626                                 continue;
1627                         }
1628
1629                         /*
1630                          * deny change if change will take class over the limit check it HERE, not after we found a matching class,
1631                          * because we should attempt to find another class if this one doesn't match us. -- w00t
1632                          */
1633                         if (c->limit && (c->GetReferenceCount() >= c->limit))
1634                         {
1635                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "OOPS: Connect class limit (%lu) hit, denying", c->limit);
1636                                 continue;
1637                         }
1638
1639                         /* if it requires a port ... */
1640                         int port = c->config->getInt("port");
1641                         if (port)
1642                         {
1643                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Requires port (%d)", port);
1644
1645                                 /* and our port doesn't match, fail. */
1646                                 if (this->GetServerPort() != port)
1647                                         continue;
1648                         }
1649
1650                         if (regdone && !c->config->getString("password").empty())
1651                         {
1652                                 if (ServerInstance->PassCompare(this, c->config->getString("password"), password, c->config->getString("hash")))
1653                                 {
1654                                         ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Bad password, skipping");
1655                                         continue;
1656                                 }
1657                         }
1658
1659                         /* we stop at the first class that meets ALL critera. */
1660                         found = c;
1661                         break;
1662                 }
1663         }
1664
1665         /*
1666          * Okay, assuming we found a class that matches.. switch us into that class, keeping refcounts up to date.
1667          */
1668         if (found)
1669         {
1670                 MyClass = found;
1671         }
1672 }
1673
1674 /* looks up a users password for their connection class (<ALLOW>/<DENY> tags)
1675  * NOTE: If the <ALLOW> or <DENY> tag specifies an ip, and this user resolves,
1676  * then their ip will be taken as 'priority' anyway, so for example,
1677  * <connect allow="127.0.0.1"> will match joe!bloggs@localhost
1678  */
1679 ConnectClass* LocalUser::GetClass()
1680 {
1681         return MyClass;
1682 }
1683
1684 ConnectClass* User::GetClass()
1685 {
1686         return NULL;
1687 }
1688
1689 void User::PurgeEmptyChannels()
1690 {
1691         // firstly decrement the count on each channel
1692         for (UCListIter f = this->chans.begin(); f != this->chans.end(); f++)
1693         {
1694                 Channel* c = *f;
1695                 c->DelUser(this);
1696         }
1697
1698         this->UnOper();
1699 }
1700
1701 const std::string& FakeUser::GetFullHost()
1702 {
1703         if (!ServerInstance->Config->HideWhoisServer.empty())
1704                 return ServerInstance->Config->HideWhoisServer;
1705         return server;
1706 }
1707
1708 const std::string& FakeUser::GetFullRealHost()
1709 {
1710         if (!ServerInstance->Config->HideWhoisServer.empty())
1711                 return ServerInstance->Config->HideWhoisServer;
1712         return server;
1713 }
1714
1715 ConnectClass::ConnectClass(ConfigTag* tag, char t, const std::string& mask)
1716         : config(tag), type(t), fakelag(true), name("unnamed"), registration_timeout(0), host(mask),
1717         pingtime(0), softsendqmax(0), hardsendqmax(0), recvqmax(0),
1718         penaltythreshold(0), commandrate(0), maxlocal(0), maxglobal(0), maxconnwarn(true), maxchans(0), limit(0)
1719 {
1720 }
1721
1722 ConnectClass::ConnectClass(ConfigTag* tag, char t, const std::string& mask, const ConnectClass& parent)
1723         : config(tag), type(t), fakelag(parent.fakelag), name("unnamed"),
1724         registration_timeout(parent.registration_timeout), host(mask), pingtime(parent.pingtime),
1725         softsendqmax(parent.softsendqmax), hardsendqmax(parent.hardsendqmax), recvqmax(parent.recvqmax),
1726         penaltythreshold(parent.penaltythreshold), commandrate(parent.commandrate),
1727         maxlocal(parent.maxlocal), maxglobal(parent.maxglobal), maxconnwarn(parent.maxconnwarn), maxchans(parent.maxchans),
1728         limit(parent.limit)
1729 {
1730 }
1731
1732 void ConnectClass::Update(const ConnectClass* src)
1733 {
1734         config = src->config;
1735         type = src->type;
1736         fakelag = src->fakelag;
1737         name = src->name;
1738         registration_timeout = src->registration_timeout;
1739         host = src->host;
1740         pingtime = src->pingtime;
1741         softsendqmax = src->softsendqmax;
1742         hardsendqmax = src->hardsendqmax;
1743         recvqmax = src->recvqmax;
1744         penaltythreshold = src->penaltythreshold;
1745         commandrate = src->commandrate;
1746         maxlocal = src->maxlocal;
1747         maxglobal = src->maxglobal;
1748         maxconnwarn = src->maxconnwarn;
1749         maxchans = src->maxchans;
1750         limit = src->limit;
1751 }