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
  32 already_sent_t LocalUser::already_sent_id = 0;
  33
  34 std::string User::ProcessNoticeMasks(const char *sm)
  35 {
  36         bool adding = true, oldadding = false;
  37         const char *c = sm;
  38         std::string output;
  39
  40         while (c && *c)
  41         {
  42                 switch (*c)
  43                 {
  44                         case '+':
  45                                 adding = true;
  46                         break;
  47                         case '-':
  48                                 adding = false;
  49                         break;
  50                         case '*':
  51                                 for (unsigned char d = 'a'; d <= 'z'; d++)
  52                                 {
  53                                         if (!ServerInstance->SNO->masks[d - 'a'].Description.empty())
  54                                         {
  55                                                 if ((!IsNoticeMaskSet(d) && adding) || (IsNoticeMaskSet(d) && !adding))
  56                                                 {
  57                                                         if ((oldadding != adding) || (!output.length()))
  58                                                                 output += (adding ? '+' : '-');
  59
  60                                                         this->SetNoticeMask(d, adding);
  61
  62                                                         output += d;
  63                                                 }
  64                                                 oldadding = adding;
  65                                                 char u = toupper(d);
  66                                                 if ((!IsNoticeMaskSet(u) && adding) || (IsNoticeMaskSet(u) && !adding))
  67                                                 {
  68                                                         if ((oldadding != adding) || (!output.length()))
  69                                                                 output += (adding ? '+' : '-');
  70
  71                                                         this->SetNoticeMask(u, adding);
  72
  73                                                         output += u;
  74                                                 }
  75                                                 oldadding = adding;
  76                                         }
  77                                 }
  78                         break;
  79                         default:
  80                                 if (isalpha(*c))
  81                                 {
  82                                         if ((!IsNoticeMaskSet(*c) && adding) || (IsNoticeMaskSet(*c) && !adding))
  83                                         {
  84                                                 if ((oldadding != adding) || (!output.length()))
  85                                                         output += (adding ? '+' : '-');
  86
  87                                                 this->SetNoticeMask(*c, adding);
  88
  89                                                 output += *c;
  90                                         }
  91                                 }
  92                                 else
  93                                         this->WriteNumeric(ERR_UNKNOWNSNOMASK, "%s %c :is unknown snomask char to me", this->nick.c_str(), *c);
  94
  95                                 oldadding = adding;
  96                         break;
  97                 }
  98
  99                 c++;
 100         }
 101
 102         std::string s = this->FormatNoticeMasks();
 103         if (s.length() == 0)
 104         {
 105                 this->modes[UM_SNOMASK] = false;
 106         }
 107
 108         return output;
 109 }
 110
 111 void LocalUser::StartDNSLookup()
 112 {
 113         try
 114         {
 115                 bool cached = false;
 116                 UserResolver *res_reverse;
 117
 118                 QueryType resolvtype = this->client_sa.sa.sa_family == AF_INET6 ? DNS_QUERY_PTR6 : DNS_QUERY_PTR4;
 119                 res_reverse = new UserResolver(this, this->GetIPString(), resolvtype, cached);
 120
 121                 ServerInstance->AddResolver(res_reverse, cached);
 122         }
 123         catch (CoreException& e)
 124         {
 125                 ServerInstance->Logs->Log("USERS", LOG_DEBUG,"Error in resolver: %s",e.GetReason());
 126                 dns_done = true;
 127                 ServerInstance->stats->statsDnsBad++;
 128         }
 129 }
 130
 131 bool User::IsNoticeMaskSet(unsigned char sm)
 132 {
 133         if (!isalpha(sm))
 134                 return false;
 135         return (snomasks[sm-65]);
 136 }
 137
 138 void User::SetNoticeMask(unsigned char sm, bool value)
 139 {
 140         if (!isalpha(sm))
 141                 return;
 142         snomasks[sm-65] = value;
 143 }
 144
 145 const char* User::FormatNoticeMasks()
 146 {
 147         static char data[MAXBUF];
 148         int offset = 0;
 149
 150         for (int n = 0; n < 64; n++)
 151         {
 152                 if (snomasks[n])
 153                         data[offset++] = n+65;
 154         }
 155
 156         data[offset] = 0;
 157         return data;
 158 }
 159
 160 bool User::IsModeSet(unsigned char m)
 161 {
 162         if (!isalpha(m))
 163                 return false;
 164         return (modes[m-65]);
 165 }
 166
 167 void User::SetMode(unsigned char m, bool value)
 168 {
 169         if (!isalpha(m))
 170                 return;
 171         modes[m-65] = value;
 172 }
 173
 174 const char* User::FormatModes(bool showparameters)
 175 {
 176         static char data[MAXBUF];
 177         std::string params;
 178         int offset = 0;
 179
 180         for (unsigned char n = 0; n < 64; n++)
 181         {
 182                 if (modes[n])
 183                 {
 184                         data[offset++] = n + 65;
 185                         ModeHandler* mh = ServerInstance->Modes->FindMode(n + 65, MODETYPE_USER);
 186                         if (showparameters && mh && mh->GetNumParams(true))
 187                         {
 188                                 std::string p = mh->GetUserParameter(this);
 189                                 if (p.length())
 190                                         params.append(" ").append(p);
 191                         }
 192                 }
 193         }
 194         data[offset] = 0;
 195         strlcat(data, params.c_str(), MAXBUF);
 196         return data;
 197 }
 198
 199 User::User(const std::string &uid, const std::string& sid, int type)
 200         : uuid(uid), server(sid), usertype(type)
 201 {
 202         age = ServerInstance->Time();
 203         signon = 0;
 204         registered = 0;
 205         quietquit = quitting = false;
 206         client_sa.sa.sa_family = AF_UNSPEC;
 207
 208         ServerInstance->Logs->Log("USERS", LOG_DEBUG, "New UUID for user: %s", uuid.c_str());
 209
 210         user_hash::iterator finduuid = ServerInstance->Users->uuidlist->find(uuid);
 211         if (finduuid == ServerInstance->Users->uuidlist->end())
 212                 (*ServerInstance->Users->uuidlist)[uuid] = this;
 213         else
 214                 throw CoreException("Duplicate UUID "+std::string(uuid)+" in User constructor");
 215 }
 216
 217 LocalUser::LocalUser(int myfd, irc::sockets::sockaddrs* client, irc::sockets::sockaddrs* servaddr)
 218         : User(ServerInstance->GetUID(), ServerInstance->Config->ServerName, USERTYPE_LOCAL), eh(this),
 219         localuseriter(ServerInstance->Users->local_users.end()),
 220         bytes_in(0), bytes_out(0), cmds_in(0), cmds_out(0), nping(0), CommandFloodPenalty(0),
 221         already_sent(0)
 222 {
 223         exempt = quitting_sendq = dns_done = false;
 224         idle_lastmsg = 0;
 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", LOG_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 (!this->IsOper())
 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 (!this->IsOper())
 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 (!this->IsOper())
 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", LOG_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 (!this->IsOper())
 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 /*
 691  * Check class restrictions
 692  */
 693 void LocalUser::CheckClass()
 694 {
 695         ConnectClass* a = this->MyClass;
 696
 697         if (!a)
 698         {
 699                 ServerInstance->Users->QuitUser(this, "Access denied by configuration");
 700                 return;
 701         }
 702         else if (a->type == CC_DENY)
 703         {
 704                 ServerInstance->Users->QuitUser(this, a->config->getString("reason", "Unauthorised connection"));
 705                 return;
 706         }
 707         else if ((a->GetMaxLocal()) && (ServerInstance->Users->LocalCloneCount(this) > a->GetMaxLocal()))
 708         {
 709                 ServerInstance->Users->QuitUser(this, "No more connections allowed from your host via this connect class (local)");
 710                 if (a->maxconnwarn)
 711                         ServerInstance->SNO->WriteToSnoMask('a', "WARNING: maximum LOCAL connections (%ld) exceeded for IP %s", a->GetMaxLocal(), this->GetIPString().c_str());
 712                 return;
 713         }
 714         else if ((a->GetMaxGlobal()) && (ServerInstance->Users->GlobalCloneCount(this) > a->GetMaxGlobal()))
 715         {
 716                 ServerInstance->Users->QuitUser(this, "No more connections allowed from your host via this connect class (global)");
 717                 if (a->maxconnwarn)
 718                         ServerInstance->SNO->WriteToSnoMask('a', "WARNING: maximum GLOBAL connections (%ld) exceeded for IP %s", a->GetMaxGlobal(), this->GetIPString().c_str());
 719                 return;
 720         }
 721
 722         this->nping = ServerInstance->Time() + a->GetPingTime() + ServerInstance->Config->dns_timeout;
 723 }
 724
 725 bool LocalUser::CheckLines(bool doZline)
 726 {
 727         const char* check[] = { "G" , "K", (doZline) ? "Z" : NULL, NULL };
 728
 729         if (!this->exempt)
 730         {
 731                 for (int n = 0; check[n]; ++n)
 732                 {
 733                         XLine *r = ServerInstance->XLines->MatchesLine(check[n], this);
 734
 735                         if (r)
 736                         {
 737                                 r->Apply(this);
 738                                 return true;
 739                         }
 740                 }
 741         }
 742
 743         return false;
 744 }
 745
 746 void LocalUser::FullConnect()
 747 {
 748         ServerInstance->stats->statsConnects++;
 749         this->idle_lastmsg = ServerInstance->Time();
 750
 751         /*
 752          * You may be thinking "wtf, we checked this in User::AddClient!" - and yes, we did, BUT.
 753          * At the time AddClient is called, we don't have a resolved host, by here we probably do - which
 754          * may put the user into a totally seperate class with different restrictions! so we *must* check again.
 755          * Don't remove this! -- w00t
 756          */
 757         MyClass = NULL;
 758         SetClass();
 759         CheckClass();
 760         CheckLines();
 761
 762         if (quitting)
 763                 return;
 764
 765         this->WriteNumeric(RPL_WELCOME, "%s :Welcome to the %s IRC Network %s",this->nick.c_str(), ServerInstance->Config->Network.c_str(), GetFullRealHost().c_str());
 766         this->WriteNumeric(RPL_YOURHOSTIS, "%s :Your host is %s, running version %s",this->nick.c_str(),ServerInstance->Config->ServerName.c_str(),BRANCH);
 767         this->WriteNumeric(RPL_SERVERCREATED, "%s :This server was created %s %s", this->nick.c_str(), __TIME__, __DATE__);
 768
 769         std::string umlist = ServerInstance->Modes->UserModeList();
 770         std::string cmlist = ServerInstance->Modes->ChannelModeList();
 771         std::string pmlist = ServerInstance->Modes->ParaModeList();
 772         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());
 773
 774         ServerInstance->ISupport.SendTo(this);
 775         this->WriteNumeric(RPL_YOURUUID, "%s %s :your unique ID", this->nick.c_str(), this->uuid.c_str());
 776
 777         /* Now registered */
 778         if (ServerInstance->Users->unregistered_count)
 779                 ServerInstance->Users->unregistered_count--;
 780
 781         /* Trigger MOTD and LUSERS output, give modules a chance too */
 782         ModResult MOD_RESULT;
 783         std::string command("LUSERS");
 784         std::vector<std::string> parameters;
 785         FIRST_MOD_RESULT(OnPreCommand, MOD_RESULT, (command, parameters, this, true, command));
 786         if (!MOD_RESULT)
 787                 ServerInstance->Parser->CallHandler(command, parameters, this);
 788
 789         MOD_RESULT = MOD_RES_PASSTHRU;
 790         command = "MOTD";
 791         FIRST_MOD_RESULT(OnPreCommand, MOD_RESULT, (command, parameters, this, true, command));
 792         if (!MOD_RESULT)
 793                 ServerInstance->Parser->CallHandler(command, parameters, this);
 794
 795         if (ServerInstance->Config->RawLog)
 796                 WriteServ("PRIVMSG %s :*** Raw I/O logging is enabled on this server. All messages, passwords, and commands are being recorded.", nick.c_str());
 797
 798         /*
 799          * We don't set REG_ALL until triggering OnUserConnect, so some module events don't spew out stuff
 800          * for a user that doesn't exist yet.
 801          */
 802         FOREACH_MOD(I_OnUserConnect,OnUserConnect(this));
 803
 804         this->registered = REG_ALL;
 805
 806         FOREACH_MOD(I_OnPostConnect,OnPostConnect(this));
 807
 808         ServerInstance->SNO->WriteToSnoMask('c',"Client connecting on port %d (class %s): %s (%s) [%s]",
 809                 this->GetServerPort(), this->MyClass->name.c_str(), GetFullRealHost().c_str(), this->GetIPString().c_str(), this->fullname.c_str());
 810         ServerInstance->Logs->Log("BANCACHE", LOG_DEBUG, "BanCache: Adding NEGATIVE hit for " + this->GetIPString());
 811         ServerInstance->BanCache->AddHit(this->GetIPString(), "", "");
 812         // reset the flood penalty (which could have been raised due to things like auto +x)
 813         CommandFloodPenalty = 0;
 814 }
 815
 816 void User::InvalidateCache()
 817 {
 818         /* Invalidate cache */
 819         cached_fullhost.clear();
 820         cached_hostip.clear();
 821         cached_makehost.clear();
 822         cached_fullrealhost.clear();
 823 }
 824
 825 bool User::ChangeNick(const std::string& newnick, bool force)
 826 {
 827         ModResult MOD_RESULT;
 828
 829         if (force)
 830                 ServerInstance->NICKForced.set(this, 1);
 831         FIRST_MOD_RESULT(OnUserPreNick, MOD_RESULT, (this, newnick));
 832         ServerInstance->NICKForced.set(this, 0);
 833
 834         if (MOD_RESULT == MOD_RES_DENY)
 835         {
 836                 ServerInstance->stats->statsCollisions++;
 837                 return false;
 838         }
 839
 840         if (assign(newnick) == assign(nick))
 841         {
 842                 // case change, don't need to check Q:lines and such
 843                 // and, if it's identical including case, we can leave right now
 844                 if (newnick == nick)
 845                         return true;
 846         }
 847         else
 848         {
 849                 /*
 850                  * Don't check Q:Lines if it's a server-enforced change, just on the off-chance some fucking *moron*
 851                  * tries to Q:Line SIDs, also, this means we just get our way period, as it really should be.
 852                  * Thanks Kein for finding this. -- w00t
 853                  *
 854                  * Also don't check Q:Lines for remote nickchanges, they should have our Q:Lines anyway to enforce themselves.
 855                  *              -- w00t
 856                  */
 857                 if (IS_LOCAL(this) && !force)
 858                 {
 859                         XLine* mq = ServerInstance->XLines->MatchesLine("Q",newnick);
 860                         if (mq)
 861                         {
 862                                 if (this->registered == REG_ALL)
 863                                 {
 864                                         ServerInstance->SNO->WriteGlobalSno('a', "Q-Lined nickname %s from %s: %s",
 865                                                 newnick.c_str(), GetFullRealHost().c_str(), mq->reason.c_str());
 866                                 }
 867                                 this->WriteNumeric(432, "%s %s :Invalid nickname: %s",this->nick.c_str(), newnick.c_str(), mq->reason.c_str());
 868                                 return false;
 869                         }
 870
 871                         if (ServerInstance->Config->RestrictBannedUsers)
 872                         {
 873                                 for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
 874                                 {
 875                                         Channel *chan = *i;
 876                                         if (chan->GetPrefixValue(this) < VOICE_VALUE && chan->IsBanned(this))
 877                                         {
 878                                                 this->WriteNumeric(404, "%s %s :Cannot send to channel (you're banned)", this->nick.c_str(), chan->name.c_str());
 879                                                 return false;
 880                                         }
 881                                 }
 882                         }
 883                 }
 884
 885                 /*
 886                  * Uh oh.. if the nickname is in use, and it's not in use by the person using it (doh) --
 887                  * then we have a potential collide. Check whether someone else is camping on the nick
 888                  * (i.e. connect -> send NICK, don't send USER.) If they are camping, force-change the
 889                  * camper to their UID, and allow the incoming nick change.
 890                  *
 891                  * If the guy using the nick is already using it, tell the incoming nick change to gtfo,
 892                  * because the nick is already (rightfully) in use. -- w00t
 893                  */
 894                 User* InUse = ServerInstance->FindNickOnly(newnick);
 895                 if (InUse && (InUse != this))
 896                 {
 897                         if (InUse->registered != REG_ALL)
 898                         {
 899                                 /* force the camper to their UUID, and ask them to re-send a NICK. */
 900                                 InUse->WriteTo(InUse, "NICK %s", InUse->uuid.c_str());
 901                                 InUse->WriteNumeric(433, "%s %s :Nickname overruled.", InUse->nick.c_str(), InUse->nick.c_str());
 902
 903                                 ServerInstance->Users->clientlist->erase(InUse->nick);
 904                                 (*(ServerInstance->Users->clientlist))[InUse->uuid] = InUse;
 905
 906                                 InUse->nick = InUse->uuid;
 907                                 InUse->InvalidateCache();
 908                                 InUse->registered &= ~REG_NICK;
 909                         }
 910                         else
 911                         {
 912                                 /* No camping, tell the incoming user  to stop trying to change nick ;p */
 913                                 this->WriteNumeric(433, "%s %s :Nickname is already in use.", this->registered >= REG_NICK ? this->nick.c_str() : "*", newnick.c_str());
 914                                 return false;
 915                         }
 916                 }
 917         }
 918
 919         if (this->registered == REG_ALL)
 920                 this->WriteCommon("NICK %s",newnick.c_str());
 921         std::string oldnick = nick;
 922         nick = newnick;
 923
 924         InvalidateCache();
 925         ServerInstance->Users->clientlist->erase(oldnick);
 926         (*(ServerInstance->Users->clientlist))[newnick] = this;
 927
 928         if (registered == REG_ALL)
 929                 FOREACH_MOD(I_OnUserPostNick,OnUserPostNick(this,oldnick));
 930
 931         return true;
 932 }
 933
 934 int LocalUser::GetServerPort()
 935 {
 936         switch (this->server_sa.sa.sa_family)
 937         {
 938                 case AF_INET6:
 939                         return htons(this->server_sa.in6.sin6_port);
 940                 case AF_INET:
 941                         return htons(this->server_sa.in4.sin_port);
 942         }
 943         return 0;
 944 }
 945
 946 const std::string& User::GetIPString()
 947 {
 948         int port;
 949         if (cachedip.empty())
 950         {
 951                 irc::sockets::satoap(client_sa, cachedip, port);
 952                 /* IP addresses starting with a : on irc are a Bad Thing (tm) */
 953                 if (cachedip[0] == ':')
 954                         cachedip.insert(0,1,'0');
 955         }
 956
 957         return cachedip;
 958 }
 959
 960 irc::sockets::cidr_mask User::GetCIDRMask()
 961 {
 962         int range = 0;
 963         switch (client_sa.sa.sa_family)
 964         {
 965                 case AF_INET6:
 966                         range = ServerInstance->Config->c_ipv6_range;
 967                         break;
 968                 case AF_INET:
 969                         range = ServerInstance->Config->c_ipv4_range;
 970                         break;
 971         }
 972         return irc::sockets::cidr_mask(client_sa, range);
 973 }
 974
 975 bool User::SetClientIP(const char* sip, bool recheck_eline)
 976 {
 977         cachedip.clear();
 978         cached_hostip.clear();
 979         return irc::sockets::aptosa(sip, 0, client_sa);
 980 }
 981
 982 void User::SetClientIP(const irc::sockets::sockaddrs& sa, bool recheck_eline)
 983 {
 984         cachedip.clear();
 985         cached_hostip.clear();
 986         memcpy(&client_sa, &sa, sizeof(irc::sockets::sockaddrs));
 987 }
 988
 989 bool LocalUser::SetClientIP(const char* sip, bool recheck_eline)
 990 {
 991         irc::sockets::sockaddrs sa;
 992         if (!irc::sockets::aptosa(sip, 0, sa))
 993                 // Invalid
 994                 return false;
 995
 996         LocalUser::SetClientIP(sa, recheck_eline);
 997         return true;
 998 }
 999
1000 void LocalUser::SetClientIP(const irc::sockets::sockaddrs& sa, bool recheck_eline)
1001 {
1002         if (sa != client_sa)
1003         {
1004                 User::SetClientIP(sa);
1005                 if (recheck_eline)
1006                         this->exempt = (ServerInstance->XLines->MatchesLine("E", this) != NULL);
1007
1008                 FOREACH_MOD(I_OnSetUserIP,OnSetUserIP(this));
1009         }
1010 }
1011
1012 static std::string wide_newline("\r\n");
1013
1014 void User::Write(const std::string& text)
1015 {
1016 }
1017
1018 void User::Write(const char *text, ...)
1019 {
1020 }
1021
1022 void LocalUser::Write(const std::string& text)
1023 {
1024         if (!ServerInstance->SE->BoundsCheckFd(&eh))
1025                 return;
1026
1027         if (text.length() > MAXBUF - 2)
1028         {
1029                 // this should happen rarely or never. Crop the string at 512 and try again.
1030                 std::string try_again = text.substr(0, MAXBUF - 2);
1031                 Write(try_again);
1032                 return;
1033         }
1034
1035         ServerInstance->Logs->Log("USEROUTPUT", LOG_RAWIO, "C[%s] O %s", uuid.c_str(), text.c_str());
1036
1037         eh.AddWriteBuf(text);
1038         eh.AddWriteBuf(wide_newline);
1039
1040         ServerInstance->stats->statsSent += text.length() + 2;
1041         this->bytes_out += text.length() + 2;
1042         this->cmds_out++;
1043 }
1044
1045 /** Write()
1046  */
1047 void LocalUser::Write(const char *text, ...)
1048 {
1049         va_list argsPtr;
1050         char textbuffer[MAXBUF];
1051
1052         va_start(argsPtr, text);
1053         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1054         va_end(argsPtr);
1055
1056         this->Write(std::string(textbuffer));
1057 }
1058
1059 void User::WriteServ(const std::string& text)
1060 {
1061         this->Write(":%s %s",ServerInstance->Config->ServerName.c_str(),text.c_str());
1062 }
1063
1064 /** WriteServ()
1065  *  Same as Write(), except `text' is prefixed with `:server.name '.
1066  */
1067 void User::WriteServ(const char* text, ...)
1068 {
1069         va_list argsPtr;
1070         char textbuffer[MAXBUF];
1071
1072         va_start(argsPtr, text);
1073         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1074         va_end(argsPtr);
1075
1076         this->WriteServ(std::string(textbuffer));
1077 }
1078
1079
1080 void User::WriteNumeric(unsigned int numeric, const char* text, ...)
1081 {
1082         va_list argsPtr;
1083         char textbuffer[MAXBUF];
1084
1085         va_start(argsPtr, text);
1086         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1087         va_end(argsPtr);
1088
1089         this->WriteNumeric(numeric, std::string(textbuffer));
1090 }
1091
1092 void User::WriteNumeric(unsigned int numeric, const std::string &text)
1093 {
1094         char textbuffer[MAXBUF];
1095         ModResult MOD_RESULT;
1096
1097         FIRST_MOD_RESULT(OnNumeric, MOD_RESULT, (this, numeric, text));
1098
1099         if (MOD_RESULT == MOD_RES_DENY)
1100                 return;
1101
1102         snprintf(textbuffer,MAXBUF,":%s %03u %s",ServerInstance->Config->ServerName.c_str(), numeric, text.c_str());
1103         this->Write(std::string(textbuffer));
1104 }
1105
1106 void User::WriteFrom(User *user, const std::string &text)
1107 {
1108         char tb[MAXBUF];
1109
1110         snprintf(tb,MAXBUF,":%s %s",user->GetFullHost().c_str(),text.c_str());
1111
1112         this->Write(std::string(tb));
1113 }
1114
1115
1116 /* write text from an originating user to originating user */
1117
1118 void User::WriteFrom(User *user, const char* text, ...)
1119 {
1120         va_list argsPtr;
1121         char textbuffer[MAXBUF];
1122
1123         va_start(argsPtr, text);
1124         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1125         va_end(argsPtr);
1126
1127         this->WriteFrom(user, std::string(textbuffer));
1128 }
1129
1130
1131 /* write text to an destination user from a source user (e.g. user privmsg) */
1132
1133 void User::WriteTo(User *dest, const char *data, ...)
1134 {
1135         char textbuffer[MAXBUF];
1136         va_list argsPtr;
1137
1138         va_start(argsPtr, data);
1139         vsnprintf(textbuffer, MAXBUF, data, argsPtr);
1140         va_end(argsPtr);
1141
1142         this->WriteTo(dest, std::string(textbuffer));
1143 }
1144
1145 void User::WriteTo(User *dest, const std::string &data)
1146 {
1147         dest->WriteFrom(this, data);
1148 }
1149
1150 void User::WriteCommon(const char* text, ...)
1151 {
1152         char textbuffer[MAXBUF];
1153         va_list argsPtr;
1154
1155         if (this->registered != REG_ALL || quitting)
1156                 return;
1157
1158         int len = snprintf(textbuffer,MAXBUF,":%s ",this->GetFullHost().c_str());
1159
1160         va_start(argsPtr, text);
1161         vsnprintf(textbuffer + len, MAXBUF - len, text, argsPtr);
1162         va_end(argsPtr);
1163
1164         this->WriteCommonRaw(std::string(textbuffer), true);
1165 }
1166
1167 void User::WriteCommonExcept(const char* text, ...)
1168 {
1169         char textbuffer[MAXBUF];
1170         va_list argsPtr;
1171
1172         if (this->registered != REG_ALL || quitting)
1173                 return;
1174
1175         int len = snprintf(textbuffer,MAXBUF,":%s ",this->GetFullHost().c_str());
1176
1177         va_start(argsPtr, text);
1178         vsnprintf(textbuffer + len, MAXBUF - len, text, argsPtr);
1179         va_end(argsPtr);
1180
1181         this->WriteCommonRaw(std::string(textbuffer), false);
1182 }
1183
1184 void User::WriteCommonRaw(const std::string &line, bool include_self)
1185 {
1186         if (this->registered != REG_ALL || quitting)
1187                 return;
1188
1189         LocalUser::already_sent_id++;
1190
1191         UserChanList include_c(chans);
1192         std::map<User*,bool> exceptions;
1193
1194         exceptions[this] = include_self;
1195
1196         FOREACH_MOD(I_OnBuildNeighborList,OnBuildNeighborList(this, include_c, exceptions));
1197
1198         for (std::map<User*,bool>::iterator i = exceptions.begin(); i != exceptions.end(); ++i)
1199         {
1200                 LocalUser* u = IS_LOCAL(i->first);
1201                 if (u && !u->quitting)
1202                 {
1203                         u->already_sent = LocalUser::already_sent_id;
1204                         if (i->second)
1205                                 u->Write(line);
1206                 }
1207         }
1208         for (UCListIter v = include_c.begin(); v != include_c.end(); ++v)
1209         {
1210                 Channel* c = *v;
1211                 const UserMembList* ulist = c->GetUsers();
1212                 for (UserMembList::const_iterator i = ulist->begin(); i != ulist->end(); i++)
1213                 {
1214                         LocalUser* u = IS_LOCAL(i->first);
1215                         if (u && !u->quitting && u->already_sent != LocalUser::already_sent_id)
1216                         {
1217                                 u->already_sent = LocalUser::already_sent_id;
1218                                 u->Write(line);
1219                         }
1220                 }
1221         }
1222 }
1223
1224 void User::WriteCommonQuit(const std::string &normal_text, const std::string &oper_text)
1225 {
1226         char tb1[MAXBUF];
1227         char tb2[MAXBUF];
1228
1229         if (this->registered != REG_ALL)
1230                 return;
1231
1232         already_sent_t uniq_id = ++LocalUser::already_sent_id;
1233
1234         snprintf(tb1,MAXBUF,":%s QUIT :%s",this->GetFullHost().c_str(),normal_text.c_str());
1235         snprintf(tb2,MAXBUF,":%s QUIT :%s",this->GetFullHost().c_str(),oper_text.c_str());
1236         std::string out1 = tb1;
1237         std::string out2 = tb2;
1238
1239         UserChanList include_c(chans);
1240         std::map<User*,bool> exceptions;
1241
1242         FOREACH_MOD(I_OnBuildNeighborList,OnBuildNeighborList(this, include_c, exceptions));
1243
1244         for (std::map<User*,bool>::iterator i = exceptions.begin(); i != exceptions.end(); ++i)
1245         {
1246                 LocalUser* u = IS_LOCAL(i->first);
1247                 if (u && !u->quitting)
1248                 {
1249                         u->already_sent = uniq_id;
1250                         if (i->second)
1251                                 u->Write(u->IsOper() ? out2 : out1);
1252                 }
1253         }
1254         for (UCListIter v = include_c.begin(); v != include_c.end(); ++v)
1255         {
1256                 const UserMembList* ulist = (*v)->GetUsers();
1257                 for (UserMembList::const_iterator i = ulist->begin(); i != ulist->end(); i++)
1258                 {
1259                         LocalUser* u = IS_LOCAL(i->first);
1260                         if (u && !u->quitting && (u->already_sent != uniq_id))
1261                         {
1262                                 u->already_sent = uniq_id;
1263                                 u->Write(u->IsOper() ? out2 : out1);
1264                         }
1265                 }
1266         }
1267 }
1268
1269 void LocalUser::SendText(const std::string& line)
1270 {
1271         Write(line);
1272 }
1273
1274 void RemoteUser::SendText(const std::string& line)
1275 {
1276         ServerInstance->PI->PushToClient(this, line);
1277 }
1278
1279 void FakeUser::SendText(const std::string& line)
1280 {
1281 }
1282
1283 void User::SendText(const char *text, ...)
1284 {
1285         va_list argsPtr;
1286         char line[MAXBUF];
1287
1288         va_start(argsPtr, text);
1289         vsnprintf(line, MAXBUF, text, argsPtr);
1290         va_end(argsPtr);
1291
1292         SendText(std::string(line));
1293 }
1294
1295 void User::SendText(const std::string &LinePrefix, std::stringstream &TextStream)
1296 {
1297         char line[MAXBUF];
1298         int start_pos = LinePrefix.length();
1299         int pos = start_pos;
1300         memcpy(line, LinePrefix.data(), pos);
1301         std::string Word;
1302         while (TextStream >> Word)
1303         {
1304                 int len = Word.length();
1305                 if (pos + len + 12 > MAXBUF)
1306                 {
1307                         line[pos] = '\0';
1308                         SendText(std::string(line));
1309                         pos = start_pos;
1310                 }
1311                 line[pos] = ' ';
1312                 memcpy(line + pos + 1, Word.data(), len);
1313                 pos += len + 1;
1314         }
1315         line[pos] = '\0';
1316         SendText(std::string(line));
1317 }
1318
1319 /* return 0 or 1 depending if users u and u2 share one or more common channels
1320  * (used by QUIT, NICK etc which arent channel specific notices)
1321  *
1322  * The old algorithm in 1.0 for this was relatively inefficient, iterating over
1323  * the first users channels then the second users channels within the outer loop,
1324  * therefore it was a maximum of x*y iterations (upon returning 0 and checking
1325  * all possible iterations). However this new function instead checks against the
1326  * channel's userlist in the inner loop which is a std::map<User*,User*>
1327  * and saves us time as we already know what pointer value we are after.
1328  * Don't quote me on the maths as i am not a mathematician or computer scientist,
1329  * but i believe this algorithm is now x+(log y) maximum iterations instead.
1330  */
1331 bool User::SharesChannelWith(User *other)
1332 {
1333         if ((!other) || (this->registered != REG_ALL) || (other->registered != REG_ALL))
1334                 return false;
1335
1336         /* Outer loop */
1337         for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1338         {
1339                 /* Eliminate the inner loop (which used to be ~equal in size to the outer loop)
1340                  * by replacing it with a map::find which *should* be more efficient
1341                  */
1342                 if ((*i)->HasUser(other))
1343                         return true;
1344         }
1345         return false;
1346 }
1347
1348 bool User::ChangeName(const char* gecos)
1349 {
1350         if (!this->fullname.compare(gecos))
1351                 return true;
1352
1353         if (IS_LOCAL(this))
1354         {
1355                 ModResult MOD_RESULT;
1356                 FIRST_MOD_RESULT(OnChangeLocalUserGECOS, MOD_RESULT, (IS_LOCAL(this),gecos));
1357                 if (MOD_RESULT == MOD_RES_DENY)
1358                         return false;
1359                 FOREACH_MOD(I_OnChangeName,OnChangeName(this,gecos));
1360         }
1361         this->fullname.assign(gecos, 0, ServerInstance->Config->Limits.MaxGecos);
1362
1363         return true;
1364 }
1365
1366 void User::DoHostCycle(const std::string &quitline)
1367 {
1368         char buffer[MAXBUF];
1369
1370         if (!ServerInstance->Config->CycleHosts)
1371                 return;
1372
1373         already_sent_t silent_id = ++LocalUser::already_sent_id;
1374         already_sent_t seen_id = ++LocalUser::already_sent_id;
1375
1376         UserChanList include_c(chans);
1377         std::map<User*,bool> exceptions;
1378
1379         FOREACH_MOD(I_OnBuildNeighborList,OnBuildNeighborList(this, include_c, exceptions));
1380
1381         for (std::map<User*,bool>::iterator i = exceptions.begin(); i != exceptions.end(); ++i)
1382         {
1383                 LocalUser* u = IS_LOCAL(i->first);
1384                 if (u && !u->quitting)
1385                 {
1386                         if (i->second)
1387                         {
1388                                 u->already_sent = seen_id;
1389                                 u->Write(quitline);
1390                         }
1391                         else
1392                         {
1393                                 u->already_sent = silent_id;
1394                         }
1395                 }
1396         }
1397         for (UCListIter v = include_c.begin(); v != include_c.end(); ++v)
1398         {
1399                 Channel* c = *v;
1400                 snprintf(buffer, MAXBUF, ":%s JOIN %s", GetFullHost().c_str(), c->name.c_str());
1401                 std::string joinline(buffer);
1402                 Membership* memb = c->GetUser(this);
1403                 std::string modeline = memb->modes;
1404                 if (modeline.length() > 0)
1405                 {
1406                         for(unsigned int i=0; i < memb->modes.length(); i++)
1407                                 modeline.append(" ").append(nick);
1408                         snprintf(buffer, MAXBUF, ":%s MODE %s +%s",
1409                                 ServerInstance->Config->CycleHostsFromUser ? GetFullHost().c_str() : ServerInstance->Config->ServerName.c_str(),
1410                                 c->name.c_str(), modeline.c_str());
1411                         modeline = buffer;
1412                 }
1413
1414                 const UserMembList *ulist = c->GetUsers();
1415                 for (UserMembList::const_iterator i = ulist->begin(); i != ulist->end(); i++)
1416                 {
1417                         LocalUser* u = IS_LOCAL(i->first);
1418                         if (u == NULL || u == this)
1419                                 continue;
1420                         if (u->already_sent == silent_id)
1421                                 continue;
1422
1423                         if (u->already_sent != seen_id)
1424                         {
1425                                 u->Write(quitline);
1426                                 u->already_sent = seen_id;
1427                         }
1428                         u->Write(joinline);
1429                         if (modeline.length() > 0)
1430                                 u->Write(modeline);
1431                 }
1432         }
1433 }
1434
1435 bool User::ChangeDisplayedHost(const char* shost)
1436 {
1437         if (dhost == shost)
1438                 return true;
1439
1440         if (IS_LOCAL(this))
1441         {
1442                 ModResult MOD_RESULT;
1443                 FIRST_MOD_RESULT(OnChangeLocalUserHost, MOD_RESULT, (IS_LOCAL(this),shost));
1444                 if (MOD_RESULT == MOD_RES_DENY)
1445                         return false;
1446         }
1447
1448         FOREACH_MOD(I_OnChangeHost, OnChangeHost(this,shost));
1449
1450         std::string quitstr = ":" + GetFullHost() + " QUIT :Changing host";
1451
1452         /* Fix by Om: User::dhost is 65 long, this was truncating some long hosts */
1453         this->dhost.assign(shost, 0, 64);
1454
1455         this->InvalidateCache();
1456
1457         this->DoHostCycle(quitstr);
1458
1459         if (IS_LOCAL(this))
1460                 this->WriteNumeric(RPL_YOURDISPLAYEDHOST, "%s %s :is now your displayed host",this->nick.c_str(),this->dhost.c_str());
1461
1462         return true;
1463 }
1464
1465 bool User::ChangeIdent(const char* newident)
1466 {
1467         if (this->ident == newident)
1468                 return true;
1469
1470         FOREACH_MOD(I_OnChangeIdent, OnChangeIdent(this,newident));
1471
1472         std::string quitstr = ":" + GetFullHost() + " QUIT :Changing ident";
1473
1474         this->ident.assign(newident, 0, ServerInstance->Config->Limits.IdentMax);
1475
1476         this->InvalidateCache();
1477
1478         this->DoHostCycle(quitstr);
1479
1480         return true;
1481 }
1482
1483 void User::SendAll(const char* command, const char* text, ...)
1484 {
1485         char textbuffer[MAXBUF];
1486         char formatbuffer[MAXBUF];
1487         va_list argsPtr;
1488
1489         va_start(argsPtr, text);
1490         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1491         va_end(argsPtr);
1492
1493         snprintf(formatbuffer,MAXBUF,":%s %s $* :%s", this->GetFullHost().c_str(), command, textbuffer);
1494         std::string fmt = formatbuffer;
1495
1496         for (LocalUserList::const_iterator i = ServerInstance->Users->local_users.begin(); i != ServerInstance->Users->local_users.end(); i++)
1497         {
1498                 if ((*i)->registered == REG_ALL)
1499                         (*i)->Write(fmt);
1500         }
1501 }
1502
1503 /*
1504  * Sets a user's connection class.
1505  * If the class name is provided, it will be used. Otherwise, the class will be guessed using host/ip/ident/etc.
1506  * NOTE: If the <ALLOW> or <DENY> tag specifies an ip, and this user resolves,
1507  * then their ip will be taken as 'priority' anyway, so for example,
1508  * <connect allow="127.0.0.1"> will match joe!bloggs@localhost
1509  */
1510 void LocalUser::SetClass(const std::string &explicit_name)
1511 {
1512         ConnectClass *found = NULL;
1513
1514         ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "Setting connect class for UID %s", this->uuid.c_str());
1515
1516         if (!explicit_name.empty())
1517         {
1518                 for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++)
1519                 {
1520                         ConnectClass* c = *i;
1521
1522                         if (explicit_name == c->name)
1523                         {
1524                                 ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "Explicitly set to %s", explicit_name.c_str());
1525                                 found = c;
1526                         }
1527                 }
1528         }
1529         else
1530         {
1531                 for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++)
1532                 {
1533                         ConnectClass* c = *i;
1534                         ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "Checking %s", c->GetName().c_str());
1535
1536                         ModResult MOD_RESULT;
1537                         FIRST_MOD_RESULT(OnSetConnectClass, MOD_RESULT, (this,c));
1538                         if (MOD_RESULT == MOD_RES_DENY)
1539                                 continue;
1540                         if (MOD_RESULT == MOD_RES_ALLOW)
1541                         {
1542                                 ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "Class forced by module to %s", c->GetName().c_str());
1543                                 found = c;
1544                                 break;
1545                         }
1546
1547                         if (c->type == CC_NAMED)
1548                                 continue;
1549
1550                         bool regdone = (registered != REG_NONE);
1551                         if (c->config->getBool("registered", regdone) != regdone)
1552                                 continue;
1553
1554                         /* check if host matches.. */
1555                         if (!InspIRCd::MatchCIDR(this->GetIPString(), c->GetHost(), NULL) &&
1556                             !InspIRCd::MatchCIDR(this->host, c->GetHost(), NULL))
1557                         {
1558                                 ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "No host match (for %s)", c->GetHost().c_str());
1559                                 continue;
1560                         }
1561
1562                         /*
1563                          * deny change if change will take class over the limit check it HERE, not after we found a matching class,
1564                          * because we should attempt to find another class if this one doesn't match us. -- w00t
1565                          */
1566                         if (c->limit && (c->GetReferenceCount() >= c->limit))
1567                         {
1568                                 ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "OOPS: Connect class limit (%lu) hit, denying", c->limit);
1569                                 continue;
1570                         }
1571
1572                         /* if it requires a port ... */
1573                         int port = c->config->getInt("port");
1574                         if (port)
1575                         {
1576                                 ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "Requires port (%d)", port);
1577
1578                                 /* and our port doesn't match, fail. */
1579                                 if (this->GetServerPort() != port)
1580                                         continue;
1581                         }
1582
1583                         if (regdone && !c->config->getString("password").empty())
1584                         {
1585                                 if (ServerInstance->PassCompare(this, c->config->getString("password"), password, c->config->getString("hash")))
1586                                 {
1587                                         ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "Bad password, skipping");
1588                                         continue;
1589                                 }
1590                         }
1591
1592                         /* we stop at the first class that meets ALL critera. */
1593                         found = c;
1594                         break;
1595                 }
1596         }
1597
1598         /*
1599          * Okay, assuming we found a class that matches.. switch us into that class, keeping refcounts up to date.
1600          */
1601         if (found)
1602         {
1603                 MyClass = found;
1604         }
1605 }
1606
1607 /* looks up a users password for their connection class (<ALLOW>/<DENY> tags)
1608  * NOTE: If the <ALLOW> or <DENY> tag specifies an ip, and this user resolves,
1609  * then their ip will be taken as 'priority' anyway, so for example,
1610  * <connect allow="127.0.0.1"> will match joe!bloggs@localhost
1611  */
1612 ConnectClass* LocalUser::GetClass()
1613 {
1614         return MyClass;
1615 }
1616
1617 ConnectClass* User::GetClass()
1618 {
1619         return NULL;
1620 }
1621
1622 void User::PurgeEmptyChannels()
1623 {
1624         // firstly decrement the count on each channel
1625         for (UCListIter f = this->chans.begin(); f != this->chans.end(); f++)
1626         {
1627                 Channel* c = *f;
1628                 c->DelUser(this);
1629         }
1630
1631         this->UnOper();
1632 }
1633
1634 const std::string& FakeUser::GetFullHost()
1635 {
1636         if (!ServerInstance->Config->HideWhoisServer.empty())
1637                 return ServerInstance->Config->HideWhoisServer;
1638         return server;
1639 }
1640
1641 const std::string& FakeUser::GetFullRealHost()
1642 {
1643         if (!ServerInstance->Config->HideWhoisServer.empty())
1644                 return ServerInstance->Config->HideWhoisServer;
1645         return server;
1646 }
1647
1648 ConnectClass::ConnectClass(ConfigTag* tag, char t, const std::string& mask)
1649         : config(tag), type(t), fakelag(true), name("unnamed"), registration_timeout(0), host(mask),
1650         pingtime(0), softsendqmax(0), hardsendqmax(0), recvqmax(0),
1651         penaltythreshold(0), commandrate(0), maxlocal(0), maxglobal(0), maxconnwarn(true), maxchans(0), limit(0)
1652 {
1653 }
1654
1655 ConnectClass::ConnectClass(ConfigTag* tag, char t, const std::string& mask, const ConnectClass& parent)
1656         : config(tag), type(t), fakelag(parent.fakelag), name("unnamed"),
1657         registration_timeout(parent.registration_timeout), host(mask), pingtime(parent.pingtime),
1658         softsendqmax(parent.softsendqmax), hardsendqmax(parent.hardsendqmax), recvqmax(parent.recvqmax),
1659         penaltythreshold(parent.penaltythreshold), commandrate(parent.commandrate),
1660         maxlocal(parent.maxlocal), maxglobal(parent.maxglobal), maxconnwarn(parent.maxconnwarn), maxchans(parent.maxchans),
1661         limit(parent.limit)
1662 {
1663 }
1664
1665 void ConnectClass::Update(const ConnectClass* src)
1666 {
1667         config = src->config;
1668         type = src->type;
1669         fakelag = src->fakelag;
1670         name = src->name;
1671         registration_timeout = src->registration_timeout;
1672         host = src->host;
1673         pingtime = src->pingtime;
1674         softsendqmax = src->softsendqmax;
1675         hardsendqmax = src->hardsendqmax;
1676         recvqmax = src->recvqmax;
1677         penaltythreshold = src->penaltythreshold;
1678         commandrate = src->commandrate;
1679         maxlocal = src->maxlocal;
1680         maxglobal = src->maxglobal;
1681         maxconnwarn = src->maxconnwarn;
1682         maxchans = src->maxchans;
1683         limit = src->limit;
1684 }