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