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         bytes_in(0), bytes_out(0), cmds_in(0), cmds_out(0), nping(0), CommandFloodPenalty(0),
 223         already_sent(0)
 224 {
 225         ident = "unknown";
 226         lastping = 0;
 227         eh.SetFd(myfd);
 228         memcpy(&server_sa, servaddr, sizeof(irc::sockets::sockaddrs));
 229
 230         /*
 231          * Initialize host and dhost here to the user's IP.
 232          * It is important to do this before calling SetClientIP()
 233          * as that passes execution to modules that expect these
 234          * fields to be valid.
 235          *
 236          * We cannot call GetIPString() now as that will access
 237          * client_sa, and that's only initialized after the first
 238          * SetClientIP() call.
 239          */
 240
 241         int port;
 242         irc::sockets::satoap(*client, host, port);
 243         if (host[0] == ':')
 244                 host.insert(0, 1, '0');
 245         dhost = host;
 246         SetClientIP(*client);
 247 }
 248
 249 User::~User()
 250 {
 251         if (ServerInstance->Users->uuidlist->find(uuid) != ServerInstance->Users->uuidlist->end())
 252                 ServerInstance->Logs->Log("USERS", DEFAULT, "User destructor for %s called without cull", uuid.c_str());
 253 }
 254
 255 const std::string& User::MakeHost()
 256 {
 257         if (!this->cached_makehost.empty())
 258                 return this->cached_makehost;
 259
 260         char nhost[MAXBUF];
 261         /* This is much faster than snprintf */
 262         char* t = nhost;
 263         for(const char* n = ident.c_str(); *n; n++)
 264                 *t++ = *n;
 265         *t++ = '@';
 266         for(const char* n = host.c_str(); *n; n++)
 267                 *t++ = *n;
 268         *t = 0;
 269
 270         this->cached_makehost.assign(nhost);
 271
 272         return this->cached_makehost;
 273 }
 274
 275 const std::string& User::MakeHostIP()
 276 {
 277         if (!this->cached_hostip.empty())
 278                 return this->cached_hostip;
 279
 280         char ihost[MAXBUF];
 281         /* This is much faster than snprintf */
 282         char* t = ihost;
 283         for(const char* n = ident.c_str(); *n; n++)
 284                 *t++ = *n;
 285         *t++ = '@';
 286         for(const char* n = this->GetIPString(); *n; n++)
 287                 *t++ = *n;
 288         *t = 0;
 289
 290         this->cached_hostip = ihost;
 291
 292         return this->cached_hostip;
 293 }
 294
 295 const std::string& User::GetFullHost()
 296 {
 297         if (!this->cached_fullhost.empty())
 298                 return this->cached_fullhost;
 299
 300         char result[MAXBUF];
 301         char* t = result;
 302         for(const char* n = nick.c_str(); *n; n++)
 303                 *t++ = *n;
 304         *t++ = '!';
 305         for(const char* n = ident.c_str(); *n; n++)
 306                 *t++ = *n;
 307         *t++ = '@';
 308         for(const char* n = dhost.c_str(); *n; n++)
 309                 *t++ = *n;
 310         *t = 0;
 311
 312         this->cached_fullhost = result;
 313
 314         return this->cached_fullhost;
 315 }
 316
 317 char* User::MakeWildHost()
 318 {
 319         static char nresult[MAXBUF];
 320         char* t = nresult;
 321         *t++ = '*';     *t++ = '!';
 322         *t++ = '*';     *t++ = '@';
 323         for(const char* n = dhost.c_str(); *n; n++)
 324                 *t++ = *n;
 325         *t = 0;
 326         return nresult;
 327 }
 328
 329 const std::string& User::GetFullRealHost()
 330 {
 331         if (!this->cached_fullrealhost.empty())
 332                 return this->cached_fullrealhost;
 333
 334         char fresult[MAXBUF];
 335         char* t = fresult;
 336         for(const char* n = nick.c_str(); *n; n++)
 337                 *t++ = *n;
 338         *t++ = '!';
 339         for(const char* n = ident.c_str(); *n; n++)
 340                 *t++ = *n;
 341         *t++ = '@';
 342         for(const char* n = host.c_str(); *n; n++)
 343                 *t++ = *n;
 344         *t = 0;
 345
 346         this->cached_fullrealhost = fresult;
 347
 348         return this->cached_fullrealhost;
 349 }
 350
 351 bool LocalUser::IsInvited(const irc::string &channel)
 352 {
 353         Channel* chan = ServerInstance->FindChan(channel.c_str());
 354         if (!chan)
 355                 return false;
 356
 357         return (Invitation::Find(chan, this) != NULL);
 358 }
 359
 360 InviteList& LocalUser::GetInviteList()
 361 {
 362         RemoveExpiredInvites();
 363         return invites;
 364 }
 365
 366 void LocalUser::InviteTo(const irc::string &channel, time_t invtimeout)
 367 {
 368         Channel* chan = ServerInstance->FindChan(channel.c_str());
 369         if (chan)
 370                 Invitation::Create(chan, this, invtimeout);
 371 }
 372
 373 void LocalUser::RemoveInvite(const irc::string &channel)
 374 {
 375         Channel* chan = ServerInstance->FindChan(channel.c_str());
 376         if (chan)
 377         {
 378                 Invitation* inv = Invitation::Find(chan, this);
 379                 if (inv)
 380                 {
 381                         inv->cull();
 382                         delete inv;
 383                 }
 384         }
 385 }
 386
 387 void LocalUser::RemoveExpiredInvites()
 388 {
 389         Invitation::Find(NULL, this);
 390 }
 391
 392 bool User::HasModePermission(unsigned char, ModeType)
 393 {
 394         return true;
 395 }
 396
 397 bool LocalUser::HasModePermission(unsigned char mode, ModeType type)
 398 {
 399         if (!IS_OPER(this))
 400                 return false;
 401
 402         if (mode < 'A' || mode > ('A' + 64)) return false;
 403
 404         return ((type == MODETYPE_USER ? oper->AllowedUserModes : oper->AllowedChanModes))[(mode - 'A')];
 405
 406 }
 407 /*
 408  * users on remote servers can completely bypass all permissions based checks.
 409  * This prevents desyncs when one server has different type/class tags to another.
 410  * That having been said, this does open things up to the possibility of source changes
 411  * allowing remote kills, etc - but if they have access to the src, they most likely have
 412  * access to the conf - so it's an end to a means either way.
 413  */
 414 bool User::HasPermission(const std::string&)
 415 {
 416         return true;
 417 }
 418
 419 bool LocalUser::HasPermission(const std::string &command)
 420 {
 421         // are they even an oper at all?
 422         if (!IS_OPER(this))
 423         {
 424                 return false;
 425         }
 426
 427         if (oper->AllowedOperCommands.find(command) != oper->AllowedOperCommands.end())
 428                 return true;
 429         else if (oper->AllowedOperCommands.find("*") != oper->AllowedOperCommands.end())
 430                 return true;
 431
 432         return false;
 433 }
 434
 435 bool User::HasPrivPermission(const std::string &privstr, bool noisy)
 436 {
 437         return true;
 438 }
 439
 440 bool LocalUser::HasPrivPermission(const std::string &privstr, bool noisy)
 441 {
 442         if (!IS_OPER(this))
 443         {
 444                 if (noisy)
 445                         this->WriteServ("NOTICE %s :You are not an oper", this->nick.c_str());
 446                 return false;
 447         }
 448
 449         if (oper->AllowedPrivs.find(privstr) != oper->AllowedPrivs.end())
 450         {
 451                 return true;
 452         }
 453         else if (oper->AllowedPrivs.find("*") != oper->AllowedPrivs.end())
 454         {
 455                 return true;
 456         }
 457
 458         if (noisy)
 459                 this->WriteServ("NOTICE %s :Oper type %s does not have access to priv %s", this->nick.c_str(), oper->NameStr(), privstr.c_str());
 460         return false;
 461 }
 462
 463 void UserIOHandler::OnDataReady()
 464 {
 465         if (user->quitting)
 466                 return;
 467
 468         if (recvq.length() > user->MyClass->GetRecvqMax() && !user->HasPrivPermission("users/flood/increased-buffers"))
 469         {
 470                 ServerInstance->Users->QuitUser(user, "RecvQ exceeded");
 471                 ServerInstance->SNO->WriteToSnoMask('a', "User %s RecvQ of %lu exceeds connect class maximum of %lu",
 472                         user->nick.c_str(), (unsigned long)recvq.length(), user->MyClass->GetRecvqMax());
 473         }
 474         unsigned long sendqmax = ULONG_MAX;
 475         if (!user->HasPrivPermission("users/flood/increased-buffers"))
 476                 sendqmax = user->MyClass->GetSendqSoftMax();
 477         unsigned long penaltymax = ULONG_MAX;
 478         if (!user->HasPrivPermission("users/flood/no-fakelag"))
 479                 penaltymax = user->MyClass->GetPenaltyThreshold() * 1000;
 480
 481         while (user->CommandFloodPenalty < penaltymax && getSendQSize() < sendqmax)
 482         {
 483                 std::string line;
 484                 line.reserve(MAXBUF);
 485                 std::string::size_type qpos = 0;
 486                 while (qpos < recvq.length())
 487                 {
 488                         char c = recvq[qpos++];
 489                         switch (c)
 490                         {
 491                         case '\0':
 492                                 c = ' ';
 493                                 break;
 494                         case '\r':
 495                                 continue;
 496                         case '\n':
 497                                 goto eol_found;
 498                         }
 499                         if (line.length() < MAXBUF - 2)
 500                                 line.push_back(c);
 501                 }
 502                 // if we got here, the recvq ran out before we found a newline
 503                 return;
 504 eol_found:
 505                 // just found a newline. Terminate the string, and pull it out of recvq
 506                 recvq = recvq.substr(qpos);
 507
 508                 // TODO should this be moved to when it was inserted in recvq?
 509                 ServerInstance->stats->statsRecv += qpos;
 510                 user->bytes_in += qpos;
 511                 user->cmds_in++;
 512
 513                 ServerInstance->Parser->ProcessBuffer(line, user);
 514                 if (user->quitting)
 515                         return;
 516         }
 517         if (user->CommandFloodPenalty >= penaltymax && !user->MyClass->fakelag)
 518                 ServerInstance->Users->QuitUser(user, "Excess Flood");
 519 }
 520
 521 void UserIOHandler::AddWriteBuf(const std::string &data)
 522 {
 523         if (user->quitting_sendq)
 524                 return;
 525         if (!user->quitting && getSendQSize() + data.length() > user->MyClass->GetSendqHardMax() &&
 526                 !user->HasPrivPermission("users/flood/increased-buffers"))
 527         {
 528                 user->quitting_sendq = true;
 529                 ServerInstance->GlobalCulls.AddSQItem(user);
 530                 return;
 531         }
 532
 533         // We still want to append data to the sendq of a quitting user,
 534         // e.g. their ERROR message that says 'closing link'
 535
 536         WriteData(data);
 537 }
 538
 539 void UserIOHandler::OnError(BufferedSocketError)
 540 {
 541         ServerInstance->Users->QuitUser(user, getError());
 542 }
 543
 544 CullResult User::cull()
 545 {
 546         if (!quitting)
 547                 ServerInstance->Users->QuitUser(this, "Culled without QuitUser");
 548         PurgeEmptyChannels();
 549
 550         if (client_sa.sa.sa_family != AF_UNSPEC)
 551                 ServerInstance->Users->RemoveCloneCounts(this);
 552
 553         return Extensible::cull();
 554 }
 555
 556 CullResult LocalUser::cull()
 557 {
 558         std::vector<LocalUser*>::iterator x = find(ServerInstance->Users->local_users.begin(),ServerInstance->Users->local_users.end(),this);
 559         if (x != ServerInstance->Users->local_users.end())
 560                 ServerInstance->Users->local_users.erase(x);
 561         else
 562                 ServerInstance->Logs->Log("USERS", DEBUG, "Failed to remove user from vector");
 563
 564         ClearInvites();
 565         eh.cull();
 566         return User::cull();
 567 }
 568
 569 CullResult FakeUser::cull()
 570 {
 571         // Fake users don't quit, they just get culled.
 572         quitting = true;
 573         ServerInstance->Users->clientlist->erase(nick);
 574         ServerInstance->Users->uuidlist->erase(uuid);
 575         return User::cull();
 576 }
 577
 578 void User::Oper(OperInfo* info)
 579 {
 580         if (this->IsModeSet('o'))
 581                 this->UnOper();
 582
 583         this->modes[UM_OPERATOR] = 1;
 584         this->oper = info;
 585         this->WriteServ("MODE %s :+o", this->nick.c_str());
 586         FOREACH_MOD(I_OnOper, OnOper(this, info->name));
 587
 588         std::string opername;
 589         if (info->oper_block)
 590                 opername = info->oper_block->getString("name");
 591
 592         if (IS_LOCAL(this))
 593         {
 594                 LocalUser* l = IS_LOCAL(this);
 595                 std::string vhost = oper->getConfig("vhost");
 596                 if (!vhost.empty())
 597                         l->ChangeDisplayedHost(vhost.c_str());
 598                 std::string opClass = oper->getConfig("class");
 599                 if (!opClass.empty())
 600                         l->SetClass(opClass);
 601         }
 602
 603         ServerInstance->SNO->WriteToSnoMask('o',"%s (%s@%s) is now an IRC operator of type %s (using oper '%s')",
 604                 nick.c_str(), ident.c_str(), host.c_str(), oper->NameStr(), opername.c_str());
 605         this->WriteNumeric(381, "%s :You are now %s %s", nick.c_str(), strchr("aeiouAEIOU", oper->name[0]) ? "an" : "a", oper->NameStr());
 606
 607         ServerInstance->Logs->Log("OPER", DEFAULT, "%s opered as type: %s", GetFullRealHost().c_str(), oper->NameStr());
 608         ServerInstance->Users->all_opers.push_back(this);
 609
 610         // Expand permissions from config for faster lookup
 611         if (IS_LOCAL(this))
 612                 oper->init();
 613
 614         FOREACH_MOD(I_OnPostOper,OnPostOper(this, oper->name, opername));
 615 }
 616
 617 void OperInfo::init()
 618 {
 619         AllowedOperCommands.clear();
 620         AllowedPrivs.clear();
 621         AllowedUserModes.reset();
 622         AllowedChanModes.reset();
 623         AllowedUserModes['o' - 'A'] = true; // Call me paranoid if you want.
 624
 625         for(std::vector<reference<ConfigTag> >::iterator iter = class_blocks.begin(); iter != class_blocks.end(); ++iter)
 626         {
 627                 ConfigTag* tag = *iter;
 628                 std::string mycmd, mypriv;
 629                 /* Process commands */
 630                 irc::spacesepstream CommandList(tag->getString("commands"));
 631                 while (CommandList.GetToken(mycmd))
 632                 {
 633                         AllowedOperCommands.insert(mycmd);
 634                 }
 635
 636                 irc::spacesepstream PrivList(tag->getString("privs"));
 637                 while (PrivList.GetToken(mypriv))
 638                 {
 639                         AllowedPrivs.insert(mypriv);
 640                 }
 641
 642                 std::string modes = tag->getString("usermodes");
 643                 for (std::string::const_iterator c = modes.begin(); c != modes.end(); ++c)
 644                 {
 645                         if (*c == '*')
 646                         {
 647                                 this->AllowedUserModes.set();
 648                         }
 649                         else if (*c >= 'A' && *c < 'z')
 650                         {
 651                                 this->AllowedUserModes[*c - 'A'] = true;
 652                         }
 653                 }
 654
 655                 modes = tag->getString("chanmodes");
 656                 for (std::string::const_iterator c = modes.begin(); c != modes.end(); ++c)
 657                 {
 658                         if (*c == '*')
 659                         {
 660                                 this->AllowedChanModes.set();
 661                         }
 662                         else if (*c >= 'A' && *c < 'z')
 663                         {
 664                                 this->AllowedChanModes[*c - 'A'] = true;
 665                         }
 666                 }
 667         }
 668 }
 669
 670 void User::UnOper()
 671 {
 672         if (!IS_OPER(this))
 673                 return;
 674
 675         /*
 676          * unset their oper type (what IS_OPER checks).
 677          * note, order is important - this must come before modes as -o attempts
 678          * to call UnOper. -- w00t
 679          */
 680         oper = NULL;
 681
 682
 683         /* Remove all oper only modes from the user when the deoper - Bug #466*/
 684         std::string moderemove("-");
 685
 686         for (unsigned char letter = 'A'; letter <= 'z'; letter++)
 687         {
 688                 ModeHandler* mh = ServerInstance->Modes->FindMode(letter, MODETYPE_USER);
 689                 if (mh && mh->NeedsOper())
 690                         moderemove += letter;
 691         }
 692
 693
 694         std::vector<std::string> parameters;
 695         parameters.push_back(this->nick);
 696         parameters.push_back(moderemove);
 697
 698         ServerInstance->Parser->CallHandler("MODE", parameters, this);
 699
 700         /* remove the user from the oper list. Will remove multiple entries as a safeguard against bug #404 */
 701         ServerInstance->Users->all_opers.remove(this);
 702
 703         this->modes[UM_OPERATOR] = 0;
 704 }
 705
 706 /* adds or updates an entry in the whowas list */
 707 void User::AddToWhoWas()
 708 {
 709         Module* whowas = ServerInstance->Modules->Find("cmd_whowas.so");
 710         if (whowas)
 711         {
 712                 WhowasRequest req(NULL, whowas, WhowasRequest::WHOWAS_ADD);
 713                 req.user = this;
 714                 req.Send();
 715         }
 716 }
 717
 718 /*
 719  * Check class restrictions
 720  */
 721 void LocalUser::CheckClass()
 722 {
 723         ConnectClass* a = this->MyClass;
 724
 725         if (!a)
 726         {
 727                 ServerInstance->Users->QuitUser(this, "Access denied by configuration");
 728                 return;
 729         }
 730         else if (a->type == CC_DENY)
 731         {
 732                 ServerInstance->Users->QuitUser(this, a->config->getString("reason", "Unauthorised connection"));
 733                 return;
 734         }
 735         else if ((a->GetMaxLocal()) && (ServerInstance->Users->LocalCloneCount(this) > a->GetMaxLocal()))
 736         {
 737                 ServerInstance->Users->QuitUser(this, "No more connections allowed from your host via this connect class (local)");
 738                 if (a->maxconnwarn)
 739                         ServerInstance->SNO->WriteToSnoMask('a', "WARNING: maximum LOCAL connections (%ld) exceeded for IP %s", a->GetMaxLocal(), this->GetIPString());
 740                 return;
 741         }
 742         else if ((a->GetMaxGlobal()) && (ServerInstance->Users->GlobalCloneCount(this) > a->GetMaxGlobal()))
 743         {
 744                 ServerInstance->Users->QuitUser(this, "No more connections allowed from your host via this connect class (global)");
 745                 if (a->maxconnwarn)
 746                         ServerInstance->SNO->WriteToSnoMask('a', "WARNING: maximum GLOBAL connections (%ld) exceeded for IP %s", a->GetMaxGlobal(), this->GetIPString());
 747                 return;
 748         }
 749
 750         this->nping = ServerInstance->Time() + a->GetPingTime() + ServerInstance->Config->dns_timeout;
 751 }
 752
 753 bool User::CheckLines(bool doZline)
 754 {
 755         const char* check[] = { "G" , "K", (doZline) ? "Z" : NULL, NULL };
 756
 757         if (!this->exempt)
 758         {
 759                 for (int n = 0; check[n]; ++n)
 760                 {
 761                         XLine *r = ServerInstance->XLines->MatchesLine(check[n], this);
 762
 763                         if (r)
 764                         {
 765                                 r->Apply(this);
 766                                 return true;
 767                         }
 768                 }
 769         }
 770
 771         return false;
 772 }
 773
 774 void LocalUser::FullConnect()
 775 {
 776         ServerInstance->stats->statsConnects++;
 777         this->idle_lastmsg = ServerInstance->Time();
 778
 779         /*
 780          * You may be thinking "wtf, we checked this in User::AddClient!" - and yes, we did, BUT.
 781          * At the time AddClient is called, we don't have a resolved host, by here we probably do - which
 782          * may put the user into a totally seperate class with different restrictions! so we *must* check again.
 783          * Don't remove this! -- w00t
 784          */
 785         MyClass = NULL;
 786         SetClass();
 787         CheckClass();
 788         CheckLines();
 789
 790         if (quitting)
 791                 return;
 792
 793         if (ServerInstance->Config->WelcomeNotice)
 794                 this->WriteServ("NOTICE Auth :Welcome to \002%s\002!",ServerInstance->Config->Network.c_str());
 795         this->WriteNumeric(RPL_WELCOME, "%s :Welcome to the %s IRC Network %s",this->nick.c_str(), ServerInstance->Config->Network.c_str(), GetFullRealHost().c_str());
 796         this->WriteNumeric(RPL_YOURHOSTIS, "%s :Your host is %s, running version %s",this->nick.c_str(),ServerInstance->Config->ServerName.c_str(),BRANCH);
 797         this->WriteNumeric(RPL_SERVERCREATED, "%s :This server was created %s %s", this->nick.c_str(), __TIME__, __DATE__);
 798
 799         std::string umlist = ServerInstance->Modes->UserModeList();
 800         std::string cmlist = ServerInstance->Modes->ChannelModeList();
 801         std::string pmlist = ServerInstance->Modes->ParaModeList();
 802         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());
 803
 804         ServerInstance->Config->Send005(this);
 805         this->WriteNumeric(RPL_YOURUUID, "%s %s :your unique ID", this->nick.c_str(), this->uuid.c_str());
 806
 807         /* Now registered */
 808         if (ServerInstance->Users->unregistered_count)
 809                 ServerInstance->Users->unregistered_count--;
 810
 811         /* Trigger MOTD and LUSERS output, give modules a chance too */
 812         ModResult MOD_RESULT;
 813         std::string command("MOTD");
 814         std::vector<std::string> parameters;
 815         FIRST_MOD_RESULT(OnPreCommand, MOD_RESULT, (command, parameters, this, true, command));
 816         if (!MOD_RESULT)
 817                 ServerInstance->CallCommandHandler(command, parameters, this);
 818
 819         MOD_RESULT = MOD_RES_PASSTHRU;
 820         command = "LUSERS";
 821         FIRST_MOD_RESULT(OnPreCommand, MOD_RESULT, (command, parameters, this, true, command));
 822         if (!MOD_RESULT)
 823                 ServerInstance->CallCommandHandler(command, parameters, this);
 824
 825         if (ServerInstance->Config->RawLog)
 826                 WriteServ("PRIVMSG %s :*** Raw I/O logging is enabled on this server. All messages, passwords, and commands are being recorded.", nick.c_str());
 827
 828         /*
 829          * We don't set REG_ALL until triggering OnUserConnect, so some module events don't spew out stuff
 830          * for a user that doesn't exist yet.
 831          */
 832         FOREACH_MOD(I_OnUserConnect,OnUserConnect(this));
 833
 834         this->registered = REG_ALL;
 835
 836         FOREACH_MOD(I_OnPostConnect,OnPostConnect(this));
 837
 838         ServerInstance->SNO->WriteToSnoMask('c',"Client connecting on port %d (class %s): %s (%s) [%s]",
 839                 this->GetServerPort(), this->MyClass->name.c_str(), GetFullRealHost().c_str(), this->GetIPString(), this->fullname.c_str());
 840         ServerInstance->Logs->Log("BANCACHE", DEBUG, "BanCache: Adding NEGATIVE hit for %s", this->GetIPString());
 841         ServerInstance->BanCache->AddHit(this->GetIPString(), "", "");
 842         // reset the flood penalty (which could have been raised due to things like auto +x)
 843         CommandFloodPenalty = 0;
 844 }
 845
 846 void User::InvalidateCache()
 847 {
 848         /* Invalidate cache */
 849         cached_fullhost.clear();
 850         cached_hostip.clear();
 851         cached_makehost.clear();
 852         cached_fullrealhost.clear();
 853 }
 854
 855 bool User::ChangeNick(const std::string& newnick, bool force)
 856 {
 857         ModResult MOD_RESULT;
 858
 859         if (force)
 860                 ServerInstance->NICKForced.set(this, 1);
 861         FIRST_MOD_RESULT(OnUserPreNick, MOD_RESULT, (this, newnick));
 862         ServerInstance->NICKForced.set(this, 0);
 863
 864         if (MOD_RESULT == MOD_RES_DENY)
 865         {
 866                 ServerInstance->stats->statsCollisions++;
 867                 return false;
 868         }
 869
 870         if (assign(newnick) == assign(nick))
 871         {
 872                 // case change, don't need to check Q:lines and such
 873                 // and, if it's identical including case, we can leave right now
 874                 if (newnick == nick)
 875                         return true;
 876         }
 877         else
 878         {
 879                 /*
 880                  * Don't check Q:Lines if it's a server-enforced change, just on the off-chance some fucking *moron*
 881                  * tries to Q:Line SIDs, also, this means we just get our way period, as it really should be.
 882                  * Thanks Kein for finding this. -- w00t
 883                  *
 884                  * Also don't check Q:Lines for remote nickchanges, they should have our Q:Lines anyway to enforce themselves.
 885                  *              -- w00t
 886                  */
 887                 if (IS_LOCAL(this) && !force)
 888                 {
 889                         XLine* mq = ServerInstance->XLines->MatchesLine("Q",newnick);
 890                         if (mq)
 891                         {
 892                                 if (this->registered == REG_ALL)
 893                                 {
 894                                         ServerInstance->SNO->WriteGlobalSno('a', "Q-Lined nickname %s from %s: %s",
 895                                                 newnick.c_str(), GetFullRealHost().c_str(), mq->reason.c_str());
 896                                 }
 897                                 this->WriteNumeric(432, "%s %s :Invalid nickname: %s",this->nick.c_str(), newnick.c_str(), mq->reason.c_str());
 898                                 return false;
 899                         }
 900
 901                         if (ServerInstance->Config->RestrictBannedUsers)
 902                         {
 903                                 for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
 904                                 {
 905                                         Channel *chan = *i;
 906                                         if (chan->GetPrefixValue(this) < VOICE_VALUE && chan->IsBanned(this))
 907                                         {
 908                                                 this->WriteNumeric(404, "%s %s :Cannot send to channel (you're banned)", this->nick.c_str(), chan->name.c_str());
 909                                                 return false;
 910                                         }
 911                                 }
 912                         }
 913                 }
 914
 915                 /*
 916                  * Uh oh.. if the nickname is in use, and it's not in use by the person using it (doh) --
 917                  * then we have a potential collide. Check whether someone else is camping on the nick
 918                  * (i.e. connect -> send NICK, don't send USER.) If they are camping, force-change the
 919                  * camper to their UID, and allow the incoming nick change.
 920                  *
 921                  * If the guy using the nick is already using it, tell the incoming nick change to gtfo,
 922                  * because the nick is already (rightfully) in use. -- w00t
 923                  */
 924                 User* InUse = ServerInstance->FindNickOnly(newnick);
 925                 if (InUse && (InUse != this))
 926                 {
 927                         if (InUse->registered != REG_ALL)
 928                         {
 929                                 /* force the camper to their UUID, and ask them to re-send a NICK. */
 930                                 InUse->WriteTo(InUse, "NICK %s", InUse->uuid.c_str());
 931                                 InUse->WriteNumeric(433, "%s %s :Nickname overruled.", InUse->nick.c_str(), InUse->nick.c_str());
 932
 933                                 ServerInstance->Users->clientlist->erase(InUse->nick);
 934                                 (*(ServerInstance->Users->clientlist))[InUse->uuid] = InUse;
 935
 936                                 InUse->nick = InUse->uuid;
 937                                 InUse->InvalidateCache();
 938                                 InUse->registered &= ~REG_NICK;
 939                         }
 940                         else
 941                         {
 942                                 /* No camping, tell the incoming user  to stop trying to change nick ;p */
 943                                 this->WriteNumeric(433, "%s %s :Nickname is already in use.", this->registered >= REG_NICK ? this->nick.c_str() : "*", newnick.c_str());
 944                                 return false;
 945                         }
 946                 }
 947         }
 948
 949         if (this->registered == REG_ALL)
 950                 this->WriteCommon("NICK %s",newnick.c_str());
 951         std::string oldnick = nick;
 952         nick = newnick;
 953
 954         InvalidateCache();
 955         ServerInstance->Users->clientlist->erase(oldnick);
 956         (*(ServerInstance->Users->clientlist))[newnick] = this;
 957
 958         if (registered == REG_ALL)
 959                 FOREACH_MOD(I_OnUserPostNick,OnUserPostNick(this,oldnick));
 960
 961         return true;
 962 }
 963
 964 int LocalUser::GetServerPort()
 965 {
 966         switch (this->server_sa.sa.sa_family)
 967         {
 968                 case AF_INET6:
 969                         return htons(this->server_sa.in6.sin6_port);
 970                 case AF_INET:
 971                         return htons(this->server_sa.in4.sin_port);
 972         }
 973         return 0;
 974 }
 975
 976 const char* User::GetIPString()
 977 {
 978         int port;
 979         if (cachedip.empty())
 980         {
 981                 irc::sockets::satoap(client_sa, cachedip, port);
 982                 /* IP addresses starting with a : on irc are a Bad Thing (tm) */
 983                 if (cachedip.c_str()[0] == ':')
 984                         cachedip.insert(0,1,'0');
 985         }
 986
 987         return cachedip.c_str();
 988 }
 989
 990 irc::sockets::cidr_mask User::GetCIDRMask()
 991 {
 992         int range = 0;
 993         switch (client_sa.sa.sa_family)
 994         {
 995                 case AF_INET6:
 996                         range = ServerInstance->Config->c_ipv6_range;
 997                         break;
 998                 case AF_INET:
 999                         range = ServerInstance->Config->c_ipv4_range;
1000                         break;
1001         }
1002         return irc::sockets::cidr_mask(client_sa, range);
1003 }
1004
1005 bool User::SetClientIP(const char* sip)
1006 {
1007         cachedip.clear();
1008         return irc::sockets::aptosa(sip, 0, client_sa);
1009 }
1010
1011 void User::SetClientIP(const irc::sockets::sockaddrs& sa)
1012 {
1013         cachedip.clear();
1014         memcpy(&client_sa, &sa, sizeof(irc::sockets::sockaddrs));
1015 }
1016
1017 bool LocalUser::SetClientIP(const char* sip)
1018 {
1019         irc::sockets::sockaddrs sa;
1020         if (!irc::sockets::aptosa(sip, 0, sa))
1021                 // Invalid
1022                 return false;
1023
1024         LocalUser::SetClientIP(sa);
1025         return true;
1026 }
1027
1028 void LocalUser::SetClientIP(const irc::sockets::sockaddrs& sa)
1029 {
1030         if (sa != client_sa)
1031         {
1032                 User::SetClientIP(sa);
1033                 FOREACH_MOD(I_OnSetUserIP,OnSetUserIP(this));
1034         }
1035 }
1036
1037 static std::string wide_newline("\r\n");
1038
1039 void User::Write(const std::string& text)
1040 {
1041 }
1042
1043 void User::Write(const char *text, ...)
1044 {
1045 }
1046
1047 void LocalUser::Write(const std::string& text)
1048 {
1049         if (!ServerInstance->SE->BoundsCheckFd(&eh))
1050                 return;
1051
1052         if (text.length() > MAXBUF - 2)
1053         {
1054                 // this should happen rarely or never. Crop the string at 512 and try again.
1055                 std::string try_again = text.substr(0, MAXBUF - 2);
1056                 Write(try_again);
1057                 return;
1058         }
1059
1060         ServerInstance->Logs->Log("USEROUTPUT", RAWIO, "C[%s] O %s", uuid.c_str(), text.c_str());
1061
1062         eh.AddWriteBuf(text);
1063         eh.AddWriteBuf(wide_newline);
1064
1065         ServerInstance->stats->statsSent += text.length() + 2;
1066         this->bytes_out += text.length() + 2;
1067         this->cmds_out++;
1068 }
1069
1070 /** Write()
1071  */
1072 void LocalUser::Write(const char *text, ...)
1073 {
1074         va_list argsPtr;
1075         char textbuffer[MAXBUF];
1076
1077         va_start(argsPtr, text);
1078         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1079         va_end(argsPtr);
1080
1081         this->Write(std::string(textbuffer));
1082 }
1083
1084 void User::WriteServ(const std::string& text)
1085 {
1086         this->Write(":%s %s",ServerInstance->Config->ServerName.c_str(),text.c_str());
1087 }
1088
1089 /** WriteServ()
1090  *  Same as Write(), except `text' is prefixed with `:server.name '.
1091  */
1092 void User::WriteServ(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->WriteServ(std::string(textbuffer));
1102 }
1103
1104
1105 void User::WriteNumeric(unsigned int numeric, const char* text, ...)
1106 {
1107         va_list argsPtr;
1108         char textbuffer[MAXBUF];
1109
1110         va_start(argsPtr, text);
1111         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1112         va_end(argsPtr);
1113
1114         this->WriteNumeric(numeric, std::string(textbuffer));
1115 }
1116
1117 void User::WriteNumeric(unsigned int numeric, const std::string &text)
1118 {
1119         char textbuffer[MAXBUF];
1120         ModResult MOD_RESULT;
1121
1122         FIRST_MOD_RESULT(OnNumeric, MOD_RESULT, (this, numeric, text));
1123
1124         if (MOD_RESULT == MOD_RES_DENY)
1125                 return;
1126
1127         snprintf(textbuffer,MAXBUF,":%s %03u %s",ServerInstance->Config->ServerName.c_str(), numeric, text.c_str());
1128         this->Write(std::string(textbuffer));
1129 }
1130
1131 void User::WriteFrom(User *user, const std::string &text)
1132 {
1133         char tb[MAXBUF];
1134
1135         snprintf(tb,MAXBUF,":%s %s",user->GetFullHost().c_str(),text.c_str());
1136
1137         this->Write(std::string(tb));
1138 }
1139
1140
1141 /* write text from an originating user to originating user */
1142
1143 void User::WriteFrom(User *user, const char* text, ...)
1144 {
1145         va_list argsPtr;
1146         char textbuffer[MAXBUF];
1147
1148         va_start(argsPtr, text);
1149         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1150         va_end(argsPtr);
1151
1152         this->WriteFrom(user, std::string(textbuffer));
1153 }
1154
1155
1156 /* write text to an destination user from a source user (e.g. user privmsg) */
1157
1158 void User::WriteTo(User *dest, const char *data, ...)
1159 {
1160         char textbuffer[MAXBUF];
1161         va_list argsPtr;
1162
1163         va_start(argsPtr, data);
1164         vsnprintf(textbuffer, MAXBUF, data, argsPtr);
1165         va_end(argsPtr);
1166
1167         this->WriteTo(dest, std::string(textbuffer));
1168 }
1169
1170 void User::WriteTo(User *dest, const std::string &data)
1171 {
1172         dest->WriteFrom(this, data);
1173 }
1174
1175 void User::WriteCommon(const char* text, ...)
1176 {
1177         char textbuffer[MAXBUF];
1178         va_list argsPtr;
1179
1180         if (this->registered != REG_ALL || quitting)
1181                 return;
1182
1183         int len = snprintf(textbuffer,MAXBUF,":%s ",this->GetFullHost().c_str());
1184
1185         va_start(argsPtr, text);
1186         vsnprintf(textbuffer + len, MAXBUF - len, text, argsPtr);
1187         va_end(argsPtr);
1188
1189         this->WriteCommonRaw(std::string(textbuffer), true);
1190 }
1191
1192 void User::WriteCommonExcept(const char* text, ...)
1193 {
1194         char textbuffer[MAXBUF];
1195         va_list argsPtr;
1196
1197         if (this->registered != REG_ALL || quitting)
1198                 return;
1199
1200         int len = snprintf(textbuffer,MAXBUF,":%s ",this->GetFullHost().c_str());
1201
1202         va_start(argsPtr, text);
1203         vsnprintf(textbuffer + len, MAXBUF - len, text, argsPtr);
1204         va_end(argsPtr);
1205
1206         this->WriteCommonRaw(std::string(textbuffer), false);
1207 }
1208
1209 void User::WriteCommonRaw(const std::string &line, bool include_self)
1210 {
1211         if (this->registered != REG_ALL || quitting)
1212                 return;
1213
1214         LocalUser::already_sent_id++;
1215
1216         UserChanList include_c(chans);
1217         std::map<User*,bool> exceptions;
1218
1219         exceptions[this] = include_self;
1220
1221         FOREACH_MOD(I_OnBuildNeighborList,OnBuildNeighborList(this, include_c, exceptions));
1222
1223         for (std::map<User*,bool>::iterator i = exceptions.begin(); i != exceptions.end(); ++i)
1224         {
1225                 LocalUser* u = IS_LOCAL(i->first);
1226                 if (u && !u->quitting)
1227                 {
1228                         u->already_sent = LocalUser::already_sent_id;
1229                         if (i->second)
1230                                 u->Write(line);
1231                 }
1232         }
1233         for (UCListIter v = include_c.begin(); v != include_c.end(); ++v)
1234         {
1235                 Channel* c = *v;
1236                 const UserMembList* ulist = c->GetUsers();
1237                 for (UserMembList::const_iterator i = ulist->begin(); i != ulist->end(); i++)
1238                 {
1239                         LocalUser* u = IS_LOCAL(i->first);
1240                         if (u && !u->quitting && u->already_sent != LocalUser::already_sent_id)
1241                         {
1242                                 u->already_sent = LocalUser::already_sent_id;
1243                                 u->Write(line);
1244                         }
1245                 }
1246         }
1247 }
1248
1249 void User::WriteCommonQuit(const std::string &normal_text, const std::string &oper_text)
1250 {
1251         char tb1[MAXBUF];
1252         char tb2[MAXBUF];
1253
1254         if (this->registered != REG_ALL)
1255                 return;
1256
1257         already_sent_t uniq_id = ++LocalUser::already_sent_id;
1258
1259         snprintf(tb1,MAXBUF,":%s QUIT :%s",this->GetFullHost().c_str(),normal_text.c_str());
1260         snprintf(tb2,MAXBUF,":%s QUIT :%s",this->GetFullHost().c_str(),oper_text.c_str());
1261         std::string out1 = tb1;
1262         std::string out2 = tb2;
1263
1264         UserChanList include_c(chans);
1265         std::map<User*,bool> exceptions;
1266
1267         FOREACH_MOD(I_OnBuildNeighborList,OnBuildNeighborList(this, include_c, exceptions));
1268
1269         for (std::map<User*,bool>::iterator i = exceptions.begin(); i != exceptions.end(); ++i)
1270         {
1271                 LocalUser* u = IS_LOCAL(i->first);
1272                 if (u && !u->quitting)
1273                 {
1274                         u->already_sent = uniq_id;
1275                         if (i->second)
1276                                 u->Write(IS_OPER(u) ? out2 : out1);
1277                 }
1278         }
1279         for (UCListIter v = include_c.begin(); v != include_c.end(); ++v)
1280         {
1281                 const UserMembList* ulist = (*v)->GetUsers();
1282                 for (UserMembList::const_iterator i = ulist->begin(); i != ulist->end(); i++)
1283                 {
1284                         LocalUser* u = IS_LOCAL(i->first);
1285                         if (u && !u->quitting && (u->already_sent != uniq_id))
1286                         {
1287                                 u->already_sent = uniq_id;
1288                                 u->Write(IS_OPER(u) ? out2 : out1);
1289                         }
1290                 }
1291         }
1292 }
1293
1294 void LocalUser::SendText(const std::string& line)
1295 {
1296         Write(line);
1297 }
1298
1299 void RemoteUser::SendText(const std::string& line)
1300 {
1301         ServerInstance->PI->PushToClient(this, line);
1302 }
1303
1304 void FakeUser::SendText(const std::string& line)
1305 {
1306 }
1307
1308 void User::SendText(const char *text, ...)
1309 {
1310         va_list argsPtr;
1311         char line[MAXBUF];
1312
1313         va_start(argsPtr, text);
1314         vsnprintf(line, MAXBUF, text, argsPtr);
1315         va_end(argsPtr);
1316
1317         SendText(std::string(line));
1318 }
1319
1320 void User::SendText(const std::string &LinePrefix, std::stringstream &TextStream)
1321 {
1322         char line[MAXBUF];
1323         int start_pos = LinePrefix.length();
1324         int pos = start_pos;
1325         memcpy(line, LinePrefix.data(), pos);
1326         std::string Word;
1327         while (TextStream >> Word)
1328         {
1329                 int len = Word.length();
1330                 if (pos + len + 12 > MAXBUF)
1331                 {
1332                         line[pos] = '\0';
1333                         SendText(std::string(line));
1334                         pos = start_pos;
1335                 }
1336                 line[pos] = ' ';
1337                 memcpy(line + pos + 1, Word.data(), len);
1338                 pos += len + 1;
1339         }
1340         line[pos] = '\0';
1341         SendText(std::string(line));
1342 }
1343
1344 /* return 0 or 1 depending if users u and u2 share one or more common channels
1345  * (used by QUIT, NICK etc which arent channel specific notices)
1346  *
1347  * The old algorithm in 1.0 for this was relatively inefficient, iterating over
1348  * the first users channels then the second users channels within the outer loop,
1349  * therefore it was a maximum of x*y iterations (upon returning 0 and checking
1350  * all possible iterations). However this new function instead checks against the
1351  * channel's userlist in the inner loop which is a std::map<User*,User*>
1352  * and saves us time as we already know what pointer value we are after.
1353  * Don't quote me on the maths as i am not a mathematician or computer scientist,
1354  * but i believe this algorithm is now x+(log y) maximum iterations instead.
1355  */
1356 bool User::SharesChannelWith(User *other)
1357 {
1358         if ((!other) || (this->registered != REG_ALL) || (other->registered != REG_ALL))
1359                 return false;
1360
1361         /* Outer loop */
1362         for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1363         {
1364                 /* Eliminate the inner loop (which used to be ~equal in size to the outer loop)
1365                  * by replacing it with a map::find which *should* be more efficient
1366                  */
1367                 if ((*i)->HasUser(other))
1368                         return true;
1369         }
1370         return false;
1371 }
1372
1373 bool User::ChangeName(const char* gecos)
1374 {
1375         if (!this->fullname.compare(gecos))
1376                 return true;
1377
1378         if (IS_LOCAL(this))
1379         {
1380                 ModResult MOD_RESULT;
1381                 FIRST_MOD_RESULT(OnChangeLocalUserGECOS, MOD_RESULT, (IS_LOCAL(this),gecos));
1382                 if (MOD_RESULT == MOD_RES_DENY)
1383                         return false;
1384                 FOREACH_MOD(I_OnChangeName,OnChangeName(this,gecos));
1385         }
1386         this->fullname.assign(gecos, 0, ServerInstance->Config->Limits.MaxGecos);
1387
1388         return true;
1389 }
1390
1391 void User::DoHostCycle(const std::string &quitline)
1392 {
1393         char buffer[MAXBUF];
1394
1395         if (!ServerInstance->Config->CycleHosts)
1396                 return;
1397
1398         already_sent_t silent_id = ++LocalUser::already_sent_id;
1399         already_sent_t seen_id = ++LocalUser::already_sent_id;
1400
1401         UserChanList include_c(chans);
1402         std::map<User*,bool> exceptions;
1403
1404         FOREACH_MOD(I_OnBuildNeighborList,OnBuildNeighborList(this, include_c, exceptions));
1405
1406         for (std::map<User*,bool>::iterator i = exceptions.begin(); i != exceptions.end(); ++i)
1407         {
1408                 LocalUser* u = IS_LOCAL(i->first);
1409                 if (u && !u->quitting)
1410                 {
1411                         if (i->second)
1412                         {
1413                                 u->already_sent = seen_id;
1414                                 u->Write(quitline);
1415                         }
1416                         else
1417                         {
1418                                 u->already_sent = silent_id;
1419                         }
1420                 }
1421         }
1422         for (UCListIter v = include_c.begin(); v != include_c.end(); ++v)
1423         {
1424                 Channel* c = *v;
1425                 snprintf(buffer, MAXBUF, ":%s JOIN %s", GetFullHost().c_str(), c->name.c_str());
1426                 std::string joinline(buffer);
1427                 Membership* memb = c->GetUser(this);
1428                 std::string modeline = memb->modes;
1429                 if (modeline.length() > 0)
1430                 {
1431                         for(unsigned int i=0; i < memb->modes.length(); i++)
1432                                 modeline.append(" ").append(nick);
1433                         snprintf(buffer, MAXBUF, ":%s MODE %s +%s",
1434                                 ServerInstance->Config->CycleHostsFromUser ? GetFullHost().c_str() : ServerInstance->Config->ServerName.c_str(),
1435                                 c->name.c_str(), modeline.c_str());
1436                         modeline = buffer;
1437                 }
1438
1439                 const UserMembList *ulist = c->GetUsers();
1440                 for (UserMembList::const_iterator i = ulist->begin(); i != ulist->end(); i++)
1441                 {
1442                         LocalUser* u = IS_LOCAL(i->first);
1443                         if (u == NULL || u == this)
1444                                 continue;
1445                         if (u->already_sent == silent_id)
1446                                 continue;
1447
1448                         if (u->already_sent != seen_id)
1449                         {
1450                                 u->Write(quitline);
1451                                 u->already_sent = seen_id;
1452                         }
1453                         u->Write(joinline);
1454                         if (modeline.length() > 0)
1455                                 u->Write(modeline);
1456                 }
1457         }
1458 }
1459
1460 bool User::ChangeDisplayedHost(const char* shost)
1461 {
1462         if (dhost == shost)
1463                 return true;
1464
1465         if (IS_LOCAL(this))
1466         {
1467                 ModResult MOD_RESULT;
1468                 FIRST_MOD_RESULT(OnChangeLocalUserHost, MOD_RESULT, (IS_LOCAL(this),shost));
1469                 if (MOD_RESULT == MOD_RES_DENY)
1470                         return false;
1471         }
1472
1473         FOREACH_MOD(I_OnChangeHost, OnChangeHost(this,shost));
1474
1475         std::string quitstr = ":" + GetFullHost() + " QUIT :Changing host";
1476
1477         /* Fix by Om: User::dhost is 65 long, this was truncating some long hosts */
1478         this->dhost.assign(shost, 0, 64);
1479
1480         this->InvalidateCache();
1481
1482         this->DoHostCycle(quitstr);
1483
1484         if (IS_LOCAL(this))
1485                 this->WriteNumeric(RPL_YOURDISPLAYEDHOST, "%s %s :is now your displayed host",this->nick.c_str(),this->dhost.c_str());
1486
1487         return true;
1488 }
1489
1490 bool User::ChangeIdent(const char* newident)
1491 {
1492         if (this->ident == newident)
1493                 return true;
1494
1495         FOREACH_MOD(I_OnChangeIdent, OnChangeIdent(this,newident));
1496
1497         std::string quitstr = ":" + GetFullHost() + " QUIT :Changing ident";
1498
1499         this->ident.assign(newident, 0, ServerInstance->Config->Limits.IdentMax + 1);
1500
1501         this->InvalidateCache();
1502
1503         this->DoHostCycle(quitstr);
1504
1505         return true;
1506 }
1507
1508 void User::SendAll(const char* command, const char* text, ...)
1509 {
1510         char textbuffer[MAXBUF];
1511         char formatbuffer[MAXBUF];
1512         va_list argsPtr;
1513
1514         va_start(argsPtr, text);
1515         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1516         va_end(argsPtr);
1517
1518         snprintf(formatbuffer,MAXBUF,":%s %s $* :%s", this->GetFullHost().c_str(), command, textbuffer);
1519         std::string fmt = formatbuffer;
1520
1521         for (std::vector<LocalUser*>::const_iterator i = ServerInstance->Users->local_users.begin(); i != ServerInstance->Users->local_users.end(); i++)
1522         {
1523                 if ((*i)->registered == REG_ALL)
1524                         (*i)->Write(fmt);
1525         }
1526 }
1527
1528
1529 std::string User::ChannelList(User* source, bool spy)
1530 {
1531         std::string list;
1532
1533         for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1534         {
1535                 Channel* c = *i;
1536                 /* If the target is the sender, neither +p nor +s is set, or
1537                  * the channel contains the user, it is not a spy channel
1538                  */
1539                 if (spy != (source == this || !(c->IsModeSet('p') || c->IsModeSet('s')) || c->HasUser(source)))
1540                         list.append(c->GetPrefixChar(this)).append(c->name).append(" ");
1541         }
1542
1543         return list;
1544 }
1545
1546 void User::SplitChanList(User* dest, const std::string &cl)
1547 {
1548         std::string line;
1549         std::ostringstream prefix;
1550         std::string::size_type start, pos, length;
1551
1552         prefix << this->nick << " " << dest->nick << " :";
1553         line = prefix.str();
1554         int namelen = ServerInstance->Config->ServerName.length() + 6;
1555
1556         for (start = 0; (pos = cl.find(' ', start)) != std::string::npos; start = pos+1)
1557         {
1558                 length = (pos == std::string::npos) ? cl.length() : pos;
1559
1560                 if (line.length() + namelen + length - start > 510)
1561                 {
1562                         ServerInstance->SendWhoisLine(this, dest, 319, "%s", line.c_str());
1563                         line = prefix.str();
1564                 }
1565
1566                 if(pos == std::string::npos)
1567                 {
1568                         line.append(cl.substr(start, length - start));
1569                         break;
1570                 }
1571                 else
1572                 {
1573                         line.append(cl.substr(start, length - start + 1));
1574                 }
1575         }
1576
1577         if (line.length() != prefix.str().length())
1578         {
1579                 ServerInstance->SendWhoisLine(this, dest, 319, "%s", line.c_str());
1580         }
1581 }
1582
1583 /*
1584  * Sets a user's connection class.
1585  * If the class name is provided, it will be used. Otherwise, the class will be guessed using host/ip/ident/etc.
1586  * NOTE: If the <ALLOW> or <DENY> tag specifies an ip, and this user resolves,
1587  * then their ip will be taken as 'priority' anyway, so for example,
1588  * <connect allow="127.0.0.1"> will match joe!bloggs@localhost
1589  */
1590 void LocalUser::SetClass(const std::string &explicit_name)
1591 {
1592         ConnectClass *found = NULL;
1593
1594         ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Setting connect class for UID %s", this->uuid.c_str());
1595
1596         if (!explicit_name.empty())
1597         {
1598                 for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++)
1599                 {
1600                         ConnectClass* c = *i;
1601
1602                         if (explicit_name == c->name)
1603                         {
1604                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Explicitly set to %s", explicit_name.c_str());
1605                                 found = c;
1606                         }
1607                 }
1608         }
1609         else
1610         {
1611                 for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++)
1612                 {
1613                         ConnectClass* c = *i;
1614                         ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Checking %s", c->GetName().c_str());
1615
1616                         ModResult MOD_RESULT;
1617                         FIRST_MOD_RESULT(OnSetConnectClass, MOD_RESULT, (this,c));
1618                         if (MOD_RESULT == MOD_RES_DENY)
1619                                 continue;
1620                         if (MOD_RESULT == MOD_RES_ALLOW)
1621                         {
1622                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Class forced by module to %s", c->GetName().c_str());
1623                                 found = c;
1624                                 break;
1625                         }
1626
1627                         if (c->type == CC_NAMED)
1628                                 continue;
1629
1630                         bool regdone = (registered != REG_NONE);
1631                         if (c->config->getBool("registered", regdone) != regdone)
1632                                 continue;
1633
1634                         /* check if host matches.. */
1635                         if (!InspIRCd::MatchCIDR(this->GetIPString(), c->GetHost(), NULL) &&
1636                             !InspIRCd::MatchCIDR(this->host, c->GetHost(), NULL))
1637                         {
1638                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "No host match (for %s)", c->GetHost().c_str());
1639                                 continue;
1640                         }
1641
1642                         /*
1643                          * deny change if change will take class over the limit check it HERE, not after we found a matching class,
1644                          * because we should attempt to find another class if this one doesn't match us. -- w00t
1645                          */
1646                         if (c->limit && (c->GetReferenceCount() >= c->limit))
1647                         {
1648                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "OOPS: Connect class limit (%lu) hit, denying", c->limit);
1649                                 continue;
1650                         }
1651
1652                         /* if it requires a port ... */
1653                         int port = c->config->getInt("port");
1654                         if (port)
1655                         {
1656                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Requires port (%d)", port);
1657
1658                                 /* and our port doesn't match, fail. */
1659                                 if (this->GetServerPort() != port)
1660                                         continue;
1661                         }
1662
1663                         if (regdone && !c->config->getString("password").empty())
1664                         {
1665                                 if (ServerInstance->PassCompare(this, c->config->getString("password"), password, c->config->getString("hash")))
1666                                 {
1667                                         ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Bad password, skipping");
1668                                         continue;
1669                                 }
1670                         }
1671
1672                         /* we stop at the first class that meets ALL critera. */
1673                         found = c;
1674                         break;
1675                 }
1676         }
1677
1678         /*
1679          * Okay, assuming we found a class that matches.. switch us into that class, keeping refcounts up to date.
1680          */
1681         if (found)
1682         {
1683                 MyClass = found;
1684         }
1685 }
1686
1687 /* looks up a users password for their connection class (<ALLOW>/<DENY> tags)
1688  * NOTE: If the <ALLOW> or <DENY> tag specifies an ip, and this user resolves,
1689  * then their ip will be taken as 'priority' anyway, so for example,
1690  * <connect allow="127.0.0.1"> will match joe!bloggs@localhost
1691  */
1692 ConnectClass* LocalUser::GetClass()
1693 {
1694         return MyClass;
1695 }
1696
1697 ConnectClass* User::GetClass()
1698 {
1699         return NULL;
1700 }
1701
1702 void User::PurgeEmptyChannels()
1703 {
1704         // firstly decrement the count on each channel
1705         for (UCListIter f = this->chans.begin(); f != this->chans.end(); f++)
1706         {
1707                 Channel* c = *f;
1708                 c->DelUser(this);
1709         }
1710
1711         this->UnOper();
1712 }
1713
1714 const std::string& FakeUser::GetFullHost()
1715 {
1716         if (!ServerInstance->Config->HideWhoisServer.empty())
1717                 return ServerInstance->Config->HideWhoisServer;
1718         return server;
1719 }
1720
1721 const std::string& FakeUser::GetFullRealHost()
1722 {
1723         if (!ServerInstance->Config->HideWhoisServer.empty())
1724                 return ServerInstance->Config->HideWhoisServer;
1725         return server;
1726 }
1727
1728 ConnectClass::ConnectClass(ConfigTag* tag, char t, const std::string& mask)
1729         : config(tag), type(t), fakelag(true), name("unnamed"), registration_timeout(0), host(mask),
1730         pingtime(0), softsendqmax(0), hardsendqmax(0), recvqmax(0),
1731         penaltythreshold(0), commandrate(0), maxlocal(0), maxglobal(0), maxconnwarn(true), maxchans(0), limit(0)
1732 {
1733 }
1734
1735 ConnectClass::ConnectClass(ConfigTag* tag, char t, const std::string& mask, const ConnectClass& parent)
1736         : config(tag), type(t), fakelag(parent.fakelag), name("unnamed"),
1737         registration_timeout(parent.registration_timeout), host(mask), pingtime(parent.pingtime),
1738         softsendqmax(parent.softsendqmax), hardsendqmax(parent.hardsendqmax), recvqmax(parent.recvqmax),
1739         penaltythreshold(parent.penaltythreshold), commandrate(parent.commandrate),
1740         maxlocal(parent.maxlocal), maxglobal(parent.maxglobal), maxconnwarn(parent.maxconnwarn), maxchans(parent.maxchans),
1741         limit(parent.limit)
1742 {
1743 }
1744
1745 void ConnectClass::Update(const ConnectClass* src)
1746 {
1747         config = src->config;
1748         type = src->type;
1749         fakelag = src->fakelag;
1750         name = src->name;
1751         registration_timeout = src->registration_timeout;
1752         host = src->host;
1753         pingtime = src->pingtime;
1754         softsendqmax = src->softsendqmax;
1755         hardsendqmax = src->hardsendqmax;
1756         recvqmax = src->recvqmax;
1757         penaltythreshold = src->penaltythreshold;
1758         commandrate = src->commandrate;
1759         maxlocal = src->maxlocal;
1760         maxglobal = src->maxglobal;
1761         maxconnwarn = src->maxconnwarn;
1762         maxchans = src->maxchans;
1763         limit = src->limit;
1764 }