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                 const char* sip = this->GetIPString();
 118                 UserResolver *res_reverse;
 119
 120                 QueryType resolvtype = this->client_sa.sa.sa_family == AF_INET6 ? DNS_QUERY_PTR6 : DNS_QUERY_PTR4;
 121                 res_reverse = new UserResolver(this, sip, resolvtype, cached);
 122
 123                 ServerInstance->AddResolver(res_reverse, cached);
 124         }
 125         catch (CoreException& e)
 126         {
 127                 ServerInstance->Logs->Log("USERS", DEBUG,"Error in resolver: %s",e.GetReason());
 128                 dns_done = true;
 129                 ServerInstance->stats->statsDnsBad++;
 130         }
 131 }
 132
 133 bool User::IsNoticeMaskSet(unsigned char sm)
 134 {
 135         if (!isalpha(sm))
 136                 return false;
 137         return (snomasks[sm-65]);
 138 }
 139
 140 void User::SetNoticeMask(unsigned char sm, bool value)
 141 {
 142         if (!isalpha(sm))
 143                 return;
 144         snomasks[sm-65] = value;
 145 }
 146
 147 const char* User::FormatNoticeMasks()
 148 {
 149         static char data[MAXBUF];
 150         int offset = 0;
 151
 152         for (int n = 0; n < 64; n++)
 153         {
 154                 if (snomasks[n])
 155                         data[offset++] = n+65;
 156         }
 157
 158         data[offset] = 0;
 159         return data;
 160 }
 161
 162 bool User::IsModeSet(unsigned char m)
 163 {
 164         if (!isalpha(m))
 165                 return false;
 166         return (modes[m-65]);
 167 }
 168
 169 void User::SetMode(unsigned char m, bool value)
 170 {
 171         if (!isalpha(m))
 172                 return;
 173         modes[m-65] = value;
 174 }
 175
 176 const char* User::FormatModes(bool showparameters)
 177 {
 178         static char data[MAXBUF];
 179         std::string params;
 180         int offset = 0;
 181
 182         for (unsigned char n = 0; n < 64; n++)
 183         {
 184                 if (modes[n])
 185                 {
 186                         data[offset++] = n + 65;
 187                         ModeHandler* mh = ServerInstance->Modes->FindMode(n + 65, MODETYPE_USER);
 188                         if (showparameters && mh && mh->GetNumParams(true))
 189                         {
 190                                 std::string p = mh->GetUserParameter(this);
 191                                 if (p.length())
 192                                         params.append(" ").append(p);
 193                         }
 194                 }
 195         }
 196         data[offset] = 0;
 197         strlcat(data, params.c_str(), MAXBUF);
 198         return data;
 199 }
 200
 201 User::User(const std::string &uid, const std::string& sid, int type)
 202         : uuid(uid), server(sid), usertype(type)
 203 {
 204         age = ServerInstance->Time();
 205         signon = idle_lastmsg = 0;
 206         registered = 0;
 207         quietquit = quitting = exempt = dns_done = false;
 208         quitting_sendq = false;
 209         client_sa.sa.sa_family = AF_UNSPEC;
 210
 211         ServerInstance->Logs->Log("USERS", DEBUG, "New UUID for user: %s", uuid.c_str());
 212
 213         user_hash::iterator finduuid = ServerInstance->Users->uuidlist->find(uuid);
 214         if (finduuid == ServerInstance->Users->uuidlist->end())
 215                 (*ServerInstance->Users->uuidlist)[uuid] = this;
 216         else
 217                 throw CoreException("Duplicate UUID "+std::string(uuid)+" in User constructor");
 218 }
 219
 220 LocalUser::LocalUser(int myfd, irc::sockets::sockaddrs* client, irc::sockets::sockaddrs* servaddr)
 221         : User(ServerInstance->GetUID(), ServerInstance->Config->ServerName, USERTYPE_LOCAL), eh(this),
 222         localuseriter(ServerInstance->Users->local_users.end()),
 223         bytes_in(0), bytes_out(0), cmds_in(0), cmds_out(0), nping(0), CommandFloodPenalty(0),
 224         already_sent(0)
 225 {
 226         ident = "unknown";
 227         lastping = 0;
 228         eh.SetFd(myfd);
 229         memcpy(&client_sa, client, sizeof(irc::sockets::sockaddrs));
 230         memcpy(&server_sa, servaddr, sizeof(irc::sockets::sockaddrs));
 231         dhost = host = GetIPString();
 232 }
 233
 234 User::~User()
 235 {
 236         if (ServerInstance->Users->uuidlist->find(uuid) != ServerInstance->Users->uuidlist->end())
 237                 ServerInstance->Logs->Log("USERS", DEFAULT, "User destructor for %s called without cull", uuid.c_str());
 238 }
 239
 240 const std::string& User::MakeHost()
 241 {
 242         if (!this->cached_makehost.empty())
 243                 return this->cached_makehost;
 244
 245         char nhost[MAXBUF];
 246         /* This is much faster than snprintf */
 247         char* t = nhost;
 248         for(const char* n = ident.c_str(); *n; n++)
 249                 *t++ = *n;
 250         *t++ = '@';
 251         for(const char* n = host.c_str(); *n; n++)
 252                 *t++ = *n;
 253         *t = 0;
 254
 255         this->cached_makehost.assign(nhost);
 256
 257         return this->cached_makehost;
 258 }
 259
 260 const std::string& User::MakeHostIP()
 261 {
 262         if (!this->cached_hostip.empty())
 263                 return this->cached_hostip;
 264
 265         char ihost[MAXBUF];
 266         /* This is much faster than snprintf */
 267         char* t = ihost;
 268         for(const char* n = ident.c_str(); *n; n++)
 269                 *t++ = *n;
 270         *t++ = '@';
 271         for(const char* n = this->GetIPString(); *n; n++)
 272                 *t++ = *n;
 273         *t = 0;
 274
 275         this->cached_hostip = ihost;
 276
 277         return this->cached_hostip;
 278 }
 279
 280 const std::string& User::GetFullHost()
 281 {
 282         if (!this->cached_fullhost.empty())
 283                 return this->cached_fullhost;
 284
 285         char result[MAXBUF];
 286         char* t = result;
 287         for(const char* n = nick.c_str(); *n; n++)
 288                 *t++ = *n;
 289         *t++ = '!';
 290         for(const char* n = ident.c_str(); *n; n++)
 291                 *t++ = *n;
 292         *t++ = '@';
 293         for(const char* n = dhost.c_str(); *n; n++)
 294                 *t++ = *n;
 295         *t = 0;
 296
 297         this->cached_fullhost = result;
 298
 299         return this->cached_fullhost;
 300 }
 301
 302 char* User::MakeWildHost()
 303 {
 304         static char nresult[MAXBUF];
 305         char* t = nresult;
 306         *t++ = '*';     *t++ = '!';
 307         *t++ = '*';     *t++ = '@';
 308         for(const char* n = dhost.c_str(); *n; n++)
 309                 *t++ = *n;
 310         *t = 0;
 311         return nresult;
 312 }
 313
 314 const std::string& User::GetFullRealHost()
 315 {
 316         if (!this->cached_fullrealhost.empty())
 317                 return this->cached_fullrealhost;
 318
 319         char fresult[MAXBUF];
 320         char* t = fresult;
 321         for(const char* n = nick.c_str(); *n; n++)
 322                 *t++ = *n;
 323         *t++ = '!';
 324         for(const char* n = ident.c_str(); *n; n++)
 325                 *t++ = *n;
 326         *t++ = '@';
 327         for(const char* n = host.c_str(); *n; n++)
 328                 *t++ = *n;
 329         *t = 0;
 330
 331         this->cached_fullrealhost = fresult;
 332
 333         return this->cached_fullrealhost;
 334 }
 335
 336 bool LocalUser::IsInvited(const irc::string &channel)
 337 {
 338         Channel* chan = ServerInstance->FindChan(channel.c_str());
 339         if (!chan)
 340                 return false;
 341
 342         return (Invitation::Find(chan, this) != NULL);
 343 }
 344
 345 InviteList& LocalUser::GetInviteList()
 346 {
 347         RemoveExpiredInvites();
 348         return invites;
 349 }
 350
 351 void LocalUser::InviteTo(const irc::string &channel, time_t invtimeout)
 352 {
 353         Channel* chan = ServerInstance->FindChan(channel.c_str());
 354         if (chan)
 355                 Invitation::Create(chan, this, invtimeout);
 356 }
 357
 358 void LocalUser::RemoveInvite(const irc::string &channel)
 359 {
 360         Channel* chan = ServerInstance->FindChan(channel.c_str());
 361         if (chan)
 362         {
 363                 Invitation* inv = Invitation::Find(chan, this);
 364                 if (inv)
 365                 {
 366                         inv->cull();
 367                         delete inv;
 368                 }
 369         }
 370 }
 371
 372 void LocalUser::RemoveExpiredInvites()
 373 {
 374         Invitation::Find(NULL, this);
 375 }
 376
 377 bool User::HasModePermission(unsigned char, ModeType)
 378 {
 379         return true;
 380 }
 381
 382 bool LocalUser::HasModePermission(unsigned char mode, ModeType type)
 383 {
 384         if (!IS_OPER(this))
 385                 return false;
 386
 387         if (mode < 'A' || mode > ('A' + 64)) return false;
 388
 389         return ((type == MODETYPE_USER ? oper->AllowedUserModes : oper->AllowedChanModes))[(mode - 'A')];
 390
 391 }
 392 /*
 393  * users on remote servers can completely bypass all permissions based checks.
 394  * This prevents desyncs when one server has different type/class tags to another.
 395  * That having been said, this does open things up to the possibility of source changes
 396  * allowing remote kills, etc - but if they have access to the src, they most likely have
 397  * access to the conf - so it's an end to a means either way.
 398  */
 399 bool User::HasPermission(const std::string&)
 400 {
 401         return true;
 402 }
 403
 404 bool LocalUser::HasPermission(const std::string &command)
 405 {
 406         // are they even an oper at all?
 407         if (!IS_OPER(this))
 408         {
 409                 return false;
 410         }
 411
 412         if (oper->AllowedOperCommands.find(command) != oper->AllowedOperCommands.end())
 413                 return true;
 414         else if (oper->AllowedOperCommands.find("*") != oper->AllowedOperCommands.end())
 415                 return true;
 416
 417         return false;
 418 }
 419
 420 bool User::HasPrivPermission(const std::string &privstr, bool noisy)
 421 {
 422         return true;
 423 }
 424
 425 bool LocalUser::HasPrivPermission(const std::string &privstr, bool noisy)
 426 {
 427         if (!IS_OPER(this))
 428         {
 429                 if (noisy)
 430                         this->WriteServ("NOTICE %s :You are not an oper", this->nick.c_str());
 431                 return false;
 432         }
 433
 434         if (oper->AllowedPrivs.find(privstr) != oper->AllowedPrivs.end())
 435         {
 436                 return true;
 437         }
 438         else if (oper->AllowedPrivs.find("*") != oper->AllowedPrivs.end())
 439         {
 440                 return true;
 441         }
 442
 443         if (noisy)
 444                 this->WriteServ("NOTICE %s :Oper type %s does not have access to priv %s", this->nick.c_str(), oper->NameStr(), privstr.c_str());
 445         return false;
 446 }
 447
 448 void UserIOHandler::OnDataReady()
 449 {
 450         if (user->quitting)
 451                 return;
 452
 453         if (recvq.length() > user->MyClass->GetRecvqMax() && !user->HasPrivPermission("users/flood/increased-buffers"))
 454         {
 455                 ServerInstance->Users->QuitUser(user, "RecvQ exceeded");
 456                 ServerInstance->SNO->WriteToSnoMask('a', "User %s RecvQ of %lu exceeds connect class maximum of %lu",
 457                         user->nick.c_str(), (unsigned long)recvq.length(), user->MyClass->GetRecvqMax());
 458         }
 459         unsigned long sendqmax = ULONG_MAX;
 460         if (!user->HasPrivPermission("users/flood/increased-buffers"))
 461                 sendqmax = user->MyClass->GetSendqSoftMax();
 462         unsigned long penaltymax = ULONG_MAX;
 463         if (!user->HasPrivPermission("users/flood/no-fakelag"))
 464                 penaltymax = user->MyClass->GetPenaltyThreshold() * 1000;
 465
 466         while (user->CommandFloodPenalty < penaltymax && getSendQSize() < sendqmax)
 467         {
 468                 std::string line;
 469                 line.reserve(MAXBUF);
 470                 std::string::size_type qpos = 0;
 471                 while (qpos < recvq.length())
 472                 {
 473                         char c = recvq[qpos++];
 474                         switch (c)
 475                         {
 476                         case '\0':
 477                                 c = ' ';
 478                                 break;
 479                         case '\r':
 480                                 continue;
 481                         case '\n':
 482                                 goto eol_found;
 483                         }
 484                         if (line.length() < MAXBUF - 2)
 485                                 line.push_back(c);
 486                 }
 487                 // if we got here, the recvq ran out before we found a newline
 488                 return;
 489 eol_found:
 490                 // just found a newline. Terminate the string, and pull it out of recvq
 491                 recvq = recvq.substr(qpos);
 492
 493                 // TODO should this be moved to when it was inserted in recvq?
 494                 ServerInstance->stats->statsRecv += qpos;
 495                 user->bytes_in += qpos;
 496                 user->cmds_in++;
 497
 498                 ServerInstance->Parser->ProcessBuffer(line, user);
 499                 if (user->quitting)
 500                         return;
 501         }
 502         if (user->CommandFloodPenalty >= penaltymax && !user->MyClass->fakelag)
 503                 ServerInstance->Users->QuitUser(user, "Excess Flood");
 504 }
 505
 506 void UserIOHandler::AddWriteBuf(const std::string &data)
 507 {
 508         if (user->quitting_sendq)
 509                 return;
 510         if (!user->quitting && getSendQSize() + data.length() > user->MyClass->GetSendqHardMax() &&
 511                 !user->HasPrivPermission("users/flood/increased-buffers"))
 512         {
 513                 user->quitting_sendq = true;
 514                 ServerInstance->GlobalCulls.AddSQItem(user);
 515                 return;
 516         }
 517
 518         // We still want to append data to the sendq of a quitting user,
 519         // e.g. their ERROR message that says 'closing link'
 520
 521         WriteData(data);
 522 }
 523
 524 void UserIOHandler::OnError(BufferedSocketError)
 525 {
 526         ServerInstance->Users->QuitUser(user, getError());
 527 }
 528
 529 CullResult User::cull()
 530 {
 531         if (!quitting)
 532                 ServerInstance->Users->QuitUser(this, "Culled without QuitUser");
 533         PurgeEmptyChannels();
 534
 535         if (client_sa.sa.sa_family != AF_UNSPEC)
 536                 ServerInstance->Users->RemoveCloneCounts(this);
 537
 538         return Extensible::cull();
 539 }
 540
 541 CullResult LocalUser::cull()
 542 {
 543         // The iterator is initialized to local_users.end() in the constructor. It is
 544         // overwritten in UserManager::AddUser() with the real iterator so this check
 545         // is only a precaution currently.
 546         if (localuseriter != ServerInstance->Users->local_users.end())
 547                 ServerInstance->Users->local_users.erase(localuseriter);
 548
 549         ClearInvites();
 550         eh.cull();
 551         return User::cull();
 552 }
 553
 554 CullResult FakeUser::cull()
 555 {
 556         // Fake users don't quit, they just get culled.
 557         quitting = true;
 558         ServerInstance->Users->clientlist->erase(nick);
 559         ServerInstance->Users->uuidlist->erase(uuid);
 560         return User::cull();
 561 }
 562
 563 void User::Oper(OperInfo* info)
 564 {
 565         if (this->IsModeSet('o'))
 566                 this->UnOper();
 567
 568         this->modes[UM_OPERATOR] = 1;
 569         this->oper = info;
 570         this->WriteServ("MODE %s :+o", this->nick.c_str());
 571         FOREACH_MOD(I_OnOper, OnOper(this, info->name));
 572
 573         std::string opername;
 574         if (info->oper_block)
 575                 opername = info->oper_block->getString("name");
 576
 577         if (IS_LOCAL(this))
 578         {
 579                 LocalUser* l = IS_LOCAL(this);
 580                 std::string vhost = oper->getConfig("vhost");
 581                 if (!vhost.empty())
 582                         l->ChangeDisplayedHost(vhost.c_str());
 583                 std::string opClass = oper->getConfig("class");
 584                 if (!opClass.empty())
 585                         l->SetClass(opClass);
 586         }
 587
 588         ServerInstance->SNO->WriteToSnoMask('o',"%s (%s@%s) is now an IRC operator of type %s (using oper '%s')",
 589                 nick.c_str(), ident.c_str(), host.c_str(), oper->NameStr(), opername.c_str());
 590         this->WriteNumeric(381, "%s :You are now %s %s", nick.c_str(), strchr("aeiouAEIOU", oper->name[0]) ? "an" : "a", oper->NameStr());
 591
 592         ServerInstance->Logs->Log("OPER", DEFAULT, "%s opered as type: %s", GetFullRealHost().c_str(), oper->NameStr());
 593         ServerInstance->Users->all_opers.push_back(this);
 594
 595         // Expand permissions from config for faster lookup
 596         if (IS_LOCAL(this))
 597                 oper->init();
 598
 599         FOREACH_MOD(I_OnPostOper,OnPostOper(this, oper->name, opername));
 600 }
 601
 602 void OperInfo::init()
 603 {
 604         AllowedOperCommands.clear();
 605         AllowedPrivs.clear();
 606         AllowedUserModes.reset();
 607         AllowedChanModes.reset();
 608         AllowedUserModes['o' - 'A'] = true; // Call me paranoid if you want.
 609
 610         for(std::vector<reference<ConfigTag> >::iterator iter = class_blocks.begin(); iter != class_blocks.end(); ++iter)
 611         {
 612                 ConfigTag* tag = *iter;
 613                 std::string mycmd, mypriv;
 614                 /* Process commands */
 615                 irc::spacesepstream CommandList(tag->getString("commands"));
 616                 while (CommandList.GetToken(mycmd))
 617                 {
 618                         AllowedOperCommands.insert(mycmd);
 619                 }
 620
 621                 irc::spacesepstream PrivList(tag->getString("privs"));
 622                 while (PrivList.GetToken(mypriv))
 623                 {
 624                         AllowedPrivs.insert(mypriv);
 625                 }
 626
 627                 std::string modes = tag->getString("usermodes");
 628                 for (std::string::const_iterator c = modes.begin(); c != modes.end(); ++c)
 629                 {
 630                         if (*c == '*')
 631                         {
 632                                 this->AllowedUserModes.set();
 633                         }
 634                         else if (*c >= 'A' && *c < 'z')
 635                         {
 636                                 this->AllowedUserModes[*c - 'A'] = true;
 637                         }
 638                 }
 639
 640                 modes = tag->getString("chanmodes");
 641                 for (std::string::const_iterator c = modes.begin(); c != modes.end(); ++c)
 642                 {
 643                         if (*c == '*')
 644                         {
 645                                 this->AllowedChanModes.set();
 646                         }
 647                         else if (*c >= 'A' && *c < 'z')
 648                         {
 649                                 this->AllowedChanModes[*c - 'A'] = true;
 650                         }
 651                 }
 652         }
 653 }
 654
 655 void User::UnOper()
 656 {
 657         if (!IS_OPER(this))
 658                 return;
 659
 660         /*
 661          * unset their oper type (what IS_OPER checks).
 662          * note, order is important - this must come before modes as -o attempts
 663          * to call UnOper. -- w00t
 664          */
 665         oper = NULL;
 666
 667
 668         /* Remove all oper only modes from the user when the deoper - Bug #466*/
 669         std::string moderemove("-");
 670
 671         for (unsigned char letter = 'A'; letter <= 'z'; letter++)
 672         {
 673                 ModeHandler* mh = ServerInstance->Modes->FindMode(letter, MODETYPE_USER);
 674                 if (mh && mh->NeedsOper())
 675                         moderemove += letter;
 676         }
 677
 678
 679         std::vector<std::string> parameters;
 680         parameters.push_back(this->nick);
 681         parameters.push_back(moderemove);
 682
 683         ServerInstance->Parser->CallHandler("MODE", parameters, this);
 684
 685         /* remove the user from the oper list. Will remove multiple entries as a safeguard against bug #404 */
 686         ServerInstance->Users->all_opers.remove(this);
 687
 688         this->modes[UM_OPERATOR] = 0;
 689 }
 690
 691 /* adds or updates an entry in the whowas list */
 692 void User::AddToWhoWas()
 693 {
 694         Module* whowas = ServerInstance->Modules->Find("cmd_whowas.so");
 695         if (whowas)
 696         {
 697                 WhowasRequest req(NULL, whowas, WhowasRequest::WHOWAS_ADD);
 698                 req.user = this;
 699                 req.Send();
 700         }
 701 }
 702
 703 /*
 704  * Check class restrictions
 705  */
 706 void LocalUser::CheckClass()
 707 {
 708         ConnectClass* a = this->MyClass;
 709
 710         if (!a)
 711         {
 712                 ServerInstance->Users->QuitUser(this, "Access denied by configuration");
 713                 return;
 714         }
 715         else if (a->type == CC_DENY)
 716         {
 717                 ServerInstance->Users->QuitUser(this, a->config->getString("reason", "Unauthorised connection"));
 718                 return;
 719         }
 720         else if ((a->GetMaxLocal()) && (ServerInstance->Users->LocalCloneCount(this) > a->GetMaxLocal()))
 721         {
 722                 ServerInstance->Users->QuitUser(this, "No more connections allowed from your host via this connect class (local)");
 723                 if (a->maxconnwarn)
 724                         ServerInstance->SNO->WriteToSnoMask('a', "WARNING: maximum LOCAL connections (%ld) exceeded for IP %s", a->GetMaxLocal(), this->GetIPString());
 725                 return;
 726         }
 727         else if ((a->GetMaxGlobal()) && (ServerInstance->Users->GlobalCloneCount(this) > a->GetMaxGlobal()))
 728         {
 729                 ServerInstance->Users->QuitUser(this, "No more connections allowed from your host via this connect class (global)");
 730                 if (a->maxconnwarn)
 731                         ServerInstance->SNO->WriteToSnoMask('a', "WARNING: maximum GLOBAL connections (%ld) exceeded for IP %s", a->GetMaxGlobal(), this->GetIPString());
 732                 return;
 733         }
 734
 735         this->nping = ServerInstance->Time() + a->GetPingTime() + ServerInstance->Config->dns_timeout;
 736 }
 737
 738 bool User::CheckLines(bool doZline)
 739 {
 740         const char* check[] = { "G" , "K", (doZline) ? "Z" : NULL, NULL };
 741
 742         if (!this->exempt)
 743         {
 744                 for (int n = 0; check[n]; ++n)
 745                 {
 746                         XLine *r = ServerInstance->XLines->MatchesLine(check[n], this);
 747
 748                         if (r)
 749                         {
 750                                 r->Apply(this);
 751                                 return true;
 752                         }
 753                 }
 754         }
 755
 756         return false;
 757 }
 758
 759 void LocalUser::FullConnect()
 760 {
 761         ServerInstance->stats->statsConnects++;
 762         this->idle_lastmsg = ServerInstance->Time();
 763
 764         /*
 765          * You may be thinking "wtf, we checked this in User::AddClient!" - and yes, we did, BUT.
 766          * At the time AddClient is called, we don't have a resolved host, by here we probably do - which
 767          * may put the user into a totally seperate class with different restrictions! so we *must* check again.
 768          * Don't remove this! -- w00t
 769          */
 770         MyClass = NULL;
 771         SetClass();
 772         CheckClass();
 773         CheckLines();
 774
 775         if (quitting)
 776                 return;
 777
 778         if (ServerInstance->Config->WelcomeNotice)
 779                 this->WriteServ("NOTICE Auth :Welcome to \002%s\002!",ServerInstance->Config->Network.c_str());
 780         this->WriteNumeric(RPL_WELCOME, "%s :Welcome to the %s IRC Network %s",this->nick.c_str(), ServerInstance->Config->Network.c_str(), GetFullRealHost().c_str());
 781         this->WriteNumeric(RPL_YOURHOSTIS, "%s :Your host is %s, running version %s",this->nick.c_str(),ServerInstance->Config->ServerName.c_str(),BRANCH);
 782         this->WriteNumeric(RPL_SERVERCREATED, "%s :This server was created %s %s", this->nick.c_str(), __TIME__, __DATE__);
 783
 784         std::string umlist = ServerInstance->Modes->UserModeList();
 785         std::string cmlist = ServerInstance->Modes->ChannelModeList();
 786         std::string pmlist = ServerInstance->Modes->ParaModeList();
 787         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());
 788
 789         ServerInstance->Config->Send005(this);
 790         this->WriteNumeric(RPL_YOURUUID, "%s %s :your unique ID", this->nick.c_str(), this->uuid.c_str());
 791
 792         /* Now registered */
 793         if (ServerInstance->Users->unregistered_count)
 794                 ServerInstance->Users->unregistered_count--;
 795
 796         /* Trigger MOTD and LUSERS output, give modules a chance too */
 797         ModResult MOD_RESULT;
 798         std::string command("MOTD");
 799         std::vector<std::string> parameters;
 800         FIRST_MOD_RESULT(OnPreCommand, MOD_RESULT, (command, parameters, this, true, command));
 801         if (!MOD_RESULT)
 802                 ServerInstance->Parser->CallHandler(command, parameters, this);
 803
 804         MOD_RESULT = MOD_RES_PASSTHRU;
 805         command = "LUSERS";
 806         FIRST_MOD_RESULT(OnPreCommand, MOD_RESULT, (command, parameters, this, true, command));
 807         if (!MOD_RESULT)
 808                 ServerInstance->Parser->CallHandler(command, parameters, this);
 809
 810         if (ServerInstance->Config->RawLog)
 811                 WriteServ("PRIVMSG %s :*** Raw I/O logging is enabled on this server. All messages, passwords, and commands are being recorded.", nick.c_str());
 812
 813         /*
 814          * We don't set REG_ALL until triggering OnUserConnect, so some module events don't spew out stuff
 815          * for a user that doesn't exist yet.
 816          */
 817         FOREACH_MOD(I_OnUserConnect,OnUserConnect(this));
 818
 819         this->registered = REG_ALL;
 820
 821         FOREACH_MOD(I_OnPostConnect,OnPostConnect(this));
 822
 823         ServerInstance->SNO->WriteToSnoMask('c',"Client connecting on port %d (class %s): %s (%s) [%s]",
 824                 this->GetServerPort(), this->MyClass->name.c_str(), GetFullRealHost().c_str(), this->GetIPString(), this->fullname.c_str());
 825         ServerInstance->Logs->Log("BANCACHE", DEBUG, "BanCache: Adding NEGATIVE hit for %s", this->GetIPString());
 826         ServerInstance->BanCache->AddHit(this->GetIPString(), "", "");
 827         // reset the flood penalty (which could have been raised due to things like auto +x)
 828         CommandFloodPenalty = 0;
 829 }
 830
 831 void User::InvalidateCache()
 832 {
 833         /* Invalidate cache */
 834         cached_fullhost.clear();
 835         cached_hostip.clear();
 836         cached_makehost.clear();
 837         cached_fullrealhost.clear();
 838 }
 839
 840 bool User::ChangeNick(const std::string& newnick, bool force)
 841 {
 842         ModResult MOD_RESULT;
 843
 844         if (force)
 845                 ServerInstance->NICKForced.set(this, 1);
 846         FIRST_MOD_RESULT(OnUserPreNick, MOD_RESULT, (this, newnick));
 847         ServerInstance->NICKForced.set(this, 0);
 848
 849         if (MOD_RESULT == MOD_RES_DENY)
 850         {
 851                 ServerInstance->stats->statsCollisions++;
 852                 return false;
 853         }
 854
 855         if (assign(newnick) == assign(nick))
 856         {
 857                 // case change, don't need to check Q:lines and such
 858                 // and, if it's identical including case, we can leave right now
 859                 if (newnick == nick)
 860                         return true;
 861         }
 862         else
 863         {
 864                 /*
 865                  * Don't check Q:Lines if it's a server-enforced change, just on the off-chance some fucking *moron*
 866                  * tries to Q:Line SIDs, also, this means we just get our way period, as it really should be.
 867                  * Thanks Kein for finding this. -- w00t
 868                  *
 869                  * Also don't check Q:Lines for remote nickchanges, they should have our Q:Lines anyway to enforce themselves.
 870                  *              -- w00t
 871                  */
 872                 if (IS_LOCAL(this) && !force)
 873                 {
 874                         XLine* mq = ServerInstance->XLines->MatchesLine("Q",newnick);
 875                         if (mq)
 876                         {
 877                                 if (this->registered == REG_ALL)
 878                                 {
 879                                         ServerInstance->SNO->WriteGlobalSno('a', "Q-Lined nickname %s from %s: %s",
 880                                                 newnick.c_str(), GetFullRealHost().c_str(), mq->reason.c_str());
 881                                 }
 882                                 this->WriteNumeric(432, "%s %s :Invalid nickname: %s",this->nick.c_str(), newnick.c_str(), mq->reason.c_str());
 883                                 return false;
 884                         }
 885
 886                         if (ServerInstance->Config->RestrictBannedUsers)
 887                         {
 888                                 for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
 889                                 {
 890                                         Channel *chan = *i;
 891                                         if (chan->GetPrefixValue(this) < VOICE_VALUE && chan->IsBanned(this))
 892                                         {
 893                                                 this->WriteNumeric(404, "%s %s :Cannot send to channel (you're banned)", this->nick.c_str(), chan->name.c_str());
 894                                                 return false;
 895                                         }
 896                                 }
 897                         }
 898                 }
 899
 900                 /*
 901                  * Uh oh.. if the nickname is in use, and it's not in use by the person using it (doh) --
 902                  * then we have a potential collide. Check whether someone else is camping on the nick
 903                  * (i.e. connect -> send NICK, don't send USER.) If they are camping, force-change the
 904                  * camper to their UID, and allow the incoming nick change.
 905                  *
 906                  * If the guy using the nick is already using it, tell the incoming nick change to gtfo,
 907                  * because the nick is already (rightfully) in use. -- w00t
 908                  */
 909                 User* InUse = ServerInstance->FindNickOnly(newnick);
 910                 if (InUse && (InUse != this))
 911                 {
 912                         if (InUse->registered != REG_ALL)
 913                         {
 914                                 /* force the camper to their UUID, and ask them to re-send a NICK. */
 915                                 InUse->WriteTo(InUse, "NICK %s", InUse->uuid.c_str());
 916                                 InUse->WriteNumeric(433, "%s %s :Nickname overruled.", InUse->nick.c_str(), InUse->nick.c_str());
 917
 918                                 ServerInstance->Users->clientlist->erase(InUse->nick);
 919                                 (*(ServerInstance->Users->clientlist))[InUse->uuid] = InUse;
 920
 921                                 InUse->nick = InUse->uuid;
 922                                 InUse->InvalidateCache();
 923                                 InUse->registered &= ~REG_NICK;
 924                         }
 925                         else
 926                         {
 927                                 /* No camping, tell the incoming user  to stop trying to change nick ;p */
 928                                 this->WriteNumeric(433, "%s %s :Nickname is already in use.", this->registered >= REG_NICK ? this->nick.c_str() : "*", newnick.c_str());
 929                                 return false;
 930                         }
 931                 }
 932         }
 933
 934         if (this->registered == REG_ALL)
 935                 this->WriteCommon("NICK %s",newnick.c_str());
 936         std::string oldnick = nick;
 937         nick = newnick;
 938
 939         InvalidateCache();
 940         ServerInstance->Users->clientlist->erase(oldnick);
 941         (*(ServerInstance->Users->clientlist))[newnick] = this;
 942
 943         if (registered == REG_ALL)
 944                 FOREACH_MOD(I_OnUserPostNick,OnUserPostNick(this,oldnick));
 945
 946         return true;
 947 }
 948
 949 int LocalUser::GetServerPort()
 950 {
 951         switch (this->server_sa.sa.sa_family)
 952         {
 953                 case AF_INET6:
 954                         return htons(this->server_sa.in6.sin6_port);
 955                 case AF_INET:
 956                         return htons(this->server_sa.in4.sin_port);
 957         }
 958         return 0;
 959 }
 960
 961 const char* User::GetIPString()
 962 {
 963         int port;
 964         if (cachedip.empty())
 965         {
 966                 irc::sockets::satoap(client_sa, cachedip, port);
 967                 /* IP addresses starting with a : on irc are a Bad Thing (tm) */
 968                 if (cachedip.c_str()[0] == ':')
 969                         cachedip.insert(0,1,'0');
 970         }
 971
 972         return cachedip.c_str();
 973 }
 974
 975 irc::sockets::cidr_mask User::GetCIDRMask()
 976 {
 977         int range = 0;
 978         switch (client_sa.sa.sa_family)
 979         {
 980                 case AF_INET6:
 981                         range = ServerInstance->Config->c_ipv6_range;
 982                         break;
 983                 case AF_INET:
 984                         range = ServerInstance->Config->c_ipv4_range;
 985                         break;
 986         }
 987         return irc::sockets::cidr_mask(client_sa, range);
 988 }
 989
 990 bool User::SetClientIP(const char* sip)
 991 {
 992         cachedip.clear();
 993         cached_hostip.clear();
 994         return irc::sockets::aptosa(sip, 0, client_sa);
 995 }
 996
 997 void User::SetClientIP(const irc::sockets::sockaddrs& sa)
 998 {
 999         cachedip.clear();
1000         cached_hostip.clear();
1001         memcpy(&client_sa, &sa, sizeof(irc::sockets::sockaddrs));
1002 }
1003
1004 bool LocalUser::SetClientIP(const char* sip)
1005 {
1006         irc::sockets::sockaddrs sa;
1007         if (!irc::sockets::aptosa(sip, 0, sa))
1008                 // Invalid
1009                 return false;
1010
1011         LocalUser::SetClientIP(sa);
1012         return true;
1013 }
1014
1015 void LocalUser::SetClientIP(const irc::sockets::sockaddrs& sa)
1016 {
1017         if (sa != client_sa)
1018         {
1019                 User::SetClientIP(sa);
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 }