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                                                 oldadding = adding;
  92                                         }
  93                                 }
  94                                 else
  95                                         this->WriteNumeric(ERR_UNKNOWNSNOMASK, "%s %c :is unknown snomask char to me", this->nick.c_str(), *c);
  96
  97                         break;
  98                 }
  99
 100                 c++;
 101         }
 102
 103         std::string s = this->FormatNoticeMasks();
 104         if (s.length() == 0)
 105         {
 106                 this->modes[UM_SNOMASK] = false;
 107         }
 108
 109         return output;
 110 }
 111
 112 void LocalUser::StartDNSLookup()
 113 {
 114         try
 115         {
 116                 bool cached = false;
 117                 const char* sip = this->GetIPString();
 118                 UserResolver *res_reverse;
 119
 120                 QueryType resolvtype = this->client_sa.sa.sa_family == AF_INET6 ? DNS_QUERY_PTR6 : DNS_QUERY_PTR4;
 121                 res_reverse = new UserResolver(this, sip, resolvtype, cached);
 122
 123                 ServerInstance->AddResolver(res_reverse, cached);
 124         }
 125         catch (CoreException& e)
 126         {
 127                 ServerInstance->Logs->Log("USERS", DEBUG,"Error in resolver: %s",e.GetReason());
 128                 dns_done = true;
 129                 ServerInstance->stats->statsDnsBad++;
 130         }
 131 }
 132
 133 bool User::IsNoticeMaskSet(unsigned char sm)
 134 {
 135         if (!isalpha(sm))
 136                 return false;
 137         return (snomasks[sm-65]);
 138 }
 139
 140 void User::SetNoticeMask(unsigned char sm, bool value)
 141 {
 142         if (!isalpha(sm))
 143                 return;
 144         snomasks[sm-65] = value;
 145 }
 146
 147 const char* User::FormatNoticeMasks()
 148 {
 149         static char data[MAXBUF];
 150         int offset = 0;
 151
 152         for (int n = 0; n < 64; n++)
 153         {
 154                 if (snomasks[n])
 155                         data[offset++] = n+65;
 156         }
 157
 158         data[offset] = 0;
 159         return data;
 160 }
 161
 162 bool User::IsModeSet(unsigned char m)
 163 {
 164         if (!isalpha(m))
 165                 return false;
 166         return (modes[m-65]);
 167 }
 168
 169 void User::SetMode(unsigned char m, bool value)
 170 {
 171         if (!isalpha(m))
 172                 return;
 173         modes[m-65] = value;
 174 }
 175
 176 const char* User::FormatModes(bool showparameters)
 177 {
 178         static char data[MAXBUF];
 179         std::string params;
 180         int offset = 0;
 181
 182         for (unsigned char n = 0; n < 64; n++)
 183         {
 184                 if (modes[n])
 185                 {
 186                         data[offset++] = n + 65;
 187                         ModeHandler* mh = ServerInstance->Modes->FindMode(n + 65, MODETYPE_USER);
 188                         if (showparameters && mh && mh->GetNumParams(true))
 189                         {
 190                                 std::string p = mh->GetUserParameter(this);
 191                                 if (p.length())
 192                                         params.append(" ").append(p);
 193                         }
 194                 }
 195         }
 196         data[offset] = 0;
 197         strlcat(data, params.c_str(), MAXBUF);
 198         return data;
 199 }
 200
 201 User::User(const std::string &uid, const std::string& sid, int type)
 202         : uuid(uid), server(sid), usertype(type)
 203 {
 204         age = ServerInstance->Time();
 205         signon = idle_lastmsg = 0;
 206         registered = 0;
 207         quietquit = quitting = exempt = dns_done = false;
 208         quitting_sendq = false;
 209         client_sa.sa.sa_family = AF_UNSPEC;
 210
 211         ServerInstance->Logs->Log("USERS", DEBUG, "New UUID for user: %s", uuid.c_str());
 212
 213         user_hash::iterator finduuid = ServerInstance->Users->uuidlist->find(uuid);
 214         if (finduuid == ServerInstance->Users->uuidlist->end())
 215                 (*ServerInstance->Users->uuidlist)[uuid] = this;
 216         else
 217                 throw CoreException("Duplicate UUID "+std::string(uuid)+" in User constructor");
 218 }
 219
 220 LocalUser::LocalUser(int myfd, irc::sockets::sockaddrs* client, irc::sockets::sockaddrs* servaddr)
 221         : User(ServerInstance->GetUID(), ServerInstance->Config->ServerName, USERTYPE_LOCAL), eh(this),
 222         localuseriter(ServerInstance->Users->local_users.end()),
 223         bytes_in(0), bytes_out(0), cmds_in(0), cmds_out(0), nping(0), CommandFloodPenalty(0),
 224         already_sent(0)
 225 {
 226         ident = "unknown";
 227         lastping = 0;
 228         eh.SetFd(myfd);
 229         memcpy(&client_sa, client, sizeof(irc::sockets::sockaddrs));
 230         memcpy(&server_sa, servaddr, sizeof(irc::sockets::sockaddrs));
 231         dhost = host = GetIPString();
 232 }
 233
 234 User::~User()
 235 {
 236         if (ServerInstance->Users->uuidlist->find(uuid) != ServerInstance->Users->uuidlist->end())
 237                 ServerInstance->Logs->Log("USERS", DEFAULT, "User destructor for %s called without cull", uuid.c_str());
 238 }
 239
 240 const std::string& User::MakeHost()
 241 {
 242         if (!this->cached_makehost.empty())
 243                 return this->cached_makehost;
 244
 245         char nhost[MAXBUF];
 246         /* This is much faster than snprintf */
 247         char* t = nhost;
 248         for(const char* n = ident.c_str(); *n; n++)
 249                 *t++ = *n;
 250         *t++ = '@';
 251         for(const char* n = host.c_str(); *n; n++)
 252                 *t++ = *n;
 253         *t = 0;
 254
 255         this->cached_makehost.assign(nhost);
 256
 257         return this->cached_makehost;
 258 }
 259
 260 const std::string& User::MakeHostIP()
 261 {
 262         if (!this->cached_hostip.empty())
 263                 return this->cached_hostip;
 264
 265         char ihost[MAXBUF];
 266         /* This is much faster than snprintf */
 267         char* t = ihost;
 268         for(const char* n = ident.c_str(); *n; n++)
 269                 *t++ = *n;
 270         *t++ = '@';
 271         for(const char* n = this->GetIPString(); *n; n++)
 272                 *t++ = *n;
 273         *t = 0;
 274
 275         this->cached_hostip = ihost;
 276
 277         return this->cached_hostip;
 278 }
 279
 280 const std::string& User::GetFullHost()
 281 {
 282         if (!this->cached_fullhost.empty())
 283                 return this->cached_fullhost;
 284
 285         char result[MAXBUF];
 286         char* t = result;
 287         for(const char* n = nick.c_str(); *n; n++)
 288                 *t++ = *n;
 289         *t++ = '!';
 290         for(const char* n = ident.c_str(); *n; n++)
 291                 *t++ = *n;
 292         *t++ = '@';
 293         for(const char* n = dhost.c_str(); *n; n++)
 294                 *t++ = *n;
 295         *t = 0;
 296
 297         this->cached_fullhost = result;
 298
 299         return this->cached_fullhost;
 300 }
 301
 302 char* User::MakeWildHost()
 303 {
 304         static char nresult[MAXBUF];
 305         char* t = nresult;
 306         *t++ = '*';     *t++ = '!';
 307         *t++ = '*';     *t++ = '@';
 308         for(const char* n = dhost.c_str(); *n; n++)
 309                 *t++ = *n;
 310         *t = 0;
 311         return nresult;
 312 }
 313
 314 const std::string& User::GetFullRealHost()
 315 {
 316         if (!this->cached_fullrealhost.empty())
 317                 return this->cached_fullrealhost;
 318
 319         char fresult[MAXBUF];
 320         char* t = fresult;
 321         for(const char* n = nick.c_str(); *n; n++)
 322                 *t++ = *n;
 323         *t++ = '!';
 324         for(const char* n = ident.c_str(); *n; n++)
 325                 *t++ = *n;
 326         *t++ = '@';
 327         for(const char* n = host.c_str(); *n; n++)
 328                 *t++ = *n;
 329         *t = 0;
 330
 331         this->cached_fullrealhost = fresult;
 332
 333         return this->cached_fullrealhost;
 334 }
 335
 336 bool LocalUser::IsInvited(const irc::string &channel)
 337 {
 338         Channel* chan = ServerInstance->FindChan(channel.c_str());
 339         if (!chan)
 340                 return false;
 341
 342         return (Invitation::Find(chan, this) != NULL);
 343 }
 344
 345 InviteList& LocalUser::GetInviteList()
 346 {
 347         RemoveExpiredInvites();
 348         return invites;
 349 }
 350
 351 void LocalUser::InviteTo(const irc::string &channel, time_t invtimeout)
 352 {
 353         Channel* chan = ServerInstance->FindChan(channel.c_str());
 354         if (chan)
 355                 Invitation::Create(chan, this, invtimeout);
 356 }
 357
 358 void LocalUser::RemoveInvite(const irc::string &channel)
 359 {
 360         Channel* chan = ServerInstance->FindChan(channel.c_str());
 361         if (chan)
 362         {
 363                 Invitation* inv = Invitation::Find(chan, this);
 364                 if (inv)
 365                 {
 366                         inv->cull();
 367                         delete inv;
 368                 }
 369         }
 370 }
 371
 372 void LocalUser::RemoveExpiredInvites()
 373 {
 374         Invitation::Find(NULL, this);
 375 }
 376
 377 bool User::HasModePermission(unsigned char, ModeType)
 378 {
 379         return true;
 380 }
 381
 382 bool LocalUser::HasModePermission(unsigned char mode, ModeType type)
 383 {
 384         if (!IS_OPER(this))
 385                 return false;
 386
 387         if (mode < 'A' || mode > ('A' + 64)) return false;
 388
 389         return ((type == MODETYPE_USER ? oper->AllowedUserModes : oper->AllowedChanModes))[(mode - 'A')];
 390
 391 }
 392 /*
 393  * users on remote servers can completely bypass all permissions based checks.
 394  * This prevents desyncs when one server has different type/class tags to another.
 395  * That having been said, this does open things up to the possibility of source changes
 396  * allowing remote kills, etc - but if they have access to the src, they most likely have
 397  * access to the conf - so it's an end to a means either way.
 398  */
 399 bool User::HasPermission(const std::string&)
 400 {
 401         return true;
 402 }
 403
 404 bool LocalUser::HasPermission(const std::string &command)
 405 {
 406         // are they even an oper at all?
 407         if (!IS_OPER(this))
 408         {
 409                 return false;
 410         }
 411
 412         if (oper->AllowedOperCommands.find(command) != oper->AllowedOperCommands.end())
 413                 return true;
 414         else if (oper->AllowedOperCommands.find("*") != oper->AllowedOperCommands.end())
 415                 return true;
 416
 417         return false;
 418 }
 419
 420 bool User::HasPrivPermission(const std::string &privstr, bool noisy)
 421 {
 422         return true;
 423 }
 424
 425 bool LocalUser::HasPrivPermission(const std::string &privstr, bool noisy)
 426 {
 427         if (!IS_OPER(this))
 428         {
 429                 if (noisy)
 430                         this->WriteServ("NOTICE %s :You are not an oper", this->nick.c_str());
 431                 return false;
 432         }
 433
 434         if (oper->AllowedPrivs.find(privstr) != oper->AllowedPrivs.end())
 435         {
 436                 return true;
 437         }
 438         else if (oper->AllowedPrivs.find("*") != oper->AllowedPrivs.end())
 439         {
 440                 return true;
 441         }
 442
 443         if (noisy)
 444                 this->WriteServ("NOTICE %s :Oper type %s does not have access to priv %s", this->nick.c_str(), oper->NameStr(), privstr.c_str());
 445         return false;
 446 }
 447
 448 void UserIOHandler::OnDataReady()
 449 {
 450         if (user->quitting)
 451                 return;
 452
 453         if (recvq.length() > user->MyClass->GetRecvqMax() && !user->HasPrivPermission("users/flood/increased-buffers"))
 454         {
 455                 ServerInstance->Users->QuitUser(user, "RecvQ exceeded");
 456                 ServerInstance->SNO->WriteToSnoMask('a', "User %s RecvQ of %lu exceeds connect class maximum of %lu",
 457                         user->nick.c_str(), (unsigned long)recvq.length(), user->MyClass->GetRecvqMax());
 458                 return;
 459         }
 460         unsigned long sendqmax = ULONG_MAX;
 461         if (!user->HasPrivPermission("users/flood/increased-buffers"))
 462                 sendqmax = user->MyClass->GetSendqSoftMax();
 463         unsigned long penaltymax = ULONG_MAX;
 464         if (!user->HasPrivPermission("users/flood/no-fakelag"))
 465                 penaltymax = user->MyClass->GetPenaltyThreshold() * 1000;
 466
 467         while (user->CommandFloodPenalty < penaltymax && getSendQSize() < sendqmax)
 468         {
 469                 std::string line;
 470                 line.reserve(MAXBUF);
 471                 std::string::size_type qpos = 0;
 472                 while (qpos < recvq.length())
 473                 {
 474                         char c = recvq[qpos++];
 475                         switch (c)
 476                         {
 477                         case '\0':
 478                                 c = ' ';
 479                                 break;
 480                         case '\r':
 481                                 continue;
 482                         case '\n':
 483                                 goto eol_found;
 484                         }
 485                         if (line.length() < MAXBUF - 2)
 486                                 line.push_back(c);
 487                 }
 488                 // if we got here, the recvq ran out before we found a newline
 489                 return;
 490 eol_found:
 491                 // just found a newline. Terminate the string, and pull it out of recvq
 492                 recvq = recvq.substr(qpos);
 493
 494                 // TODO should this be moved to when it was inserted in recvq?
 495                 ServerInstance->stats->statsRecv += qpos;
 496                 user->bytes_in += qpos;
 497                 user->cmds_in++;
 498
 499                 ServerInstance->Parser->ProcessBuffer(line, user);
 500                 if (user->quitting)
 501                         return;
 502         }
 503         if (user->CommandFloodPenalty >= penaltymax && !user->MyClass->fakelag)
 504                 ServerInstance->Users->QuitUser(user, "Excess Flood");
 505 }
 506
 507 void UserIOHandler::AddWriteBuf(const std::string &data)
 508 {
 509         if (user->quitting_sendq)
 510                 return;
 511         if (!user->quitting && getSendQSize() + data.length() > user->MyClass->GetSendqHardMax() &&
 512                 !user->HasPrivPermission("users/flood/increased-buffers"))
 513         {
 514                 user->quitting_sendq = true;
 515                 ServerInstance->GlobalCulls.AddSQItem(user);
 516                 return;
 517         }
 518
 519         // We still want to append data to the sendq of a quitting user,
 520         // e.g. their ERROR message that says 'closing link'
 521
 522         WriteData(data);
 523 }
 524
 525 void UserIOHandler::OnError(BufferedSocketError)
 526 {
 527         ServerInstance->Users->QuitUser(user, getError());
 528 }
 529
 530 CullResult User::cull()
 531 {
 532         if (!quitting)
 533                 ServerInstance->Users->QuitUser(this, "Culled without QuitUser");
 534         PurgeEmptyChannels();
 535
 536         if (client_sa.sa.sa_family != AF_UNSPEC)
 537                 ServerInstance->Users->RemoveCloneCounts(this);
 538
 539         return Extensible::cull();
 540 }
 541
 542 CullResult LocalUser::cull()
 543 {
 544         // The iterator is initialized to local_users.end() in the constructor. It is
 545         // overwritten in UserManager::AddUser() with the real iterator so this check
 546         // is only a precaution currently.
 547         if (localuseriter != ServerInstance->Users->local_users.end())
 548         {
 549                 ServerInstance->Users->local_count--;
 550                 ServerInstance->Users->local_users.erase(localuseriter);
 551         }
 552         else
 553                 ServerInstance->Logs->Log("USERS", DEFAULT, "ERROR: LocalUserIter does not point to a valid entry for " + this->nick);
 554
 555         ClearInvites();
 556         eh.cull();
 557         return User::cull();
 558 }
 559
 560 CullResult FakeUser::cull()
 561 {
 562         // Fake users don't quit, they just get culled.
 563         quitting = true;
 564         ServerInstance->Users->clientlist->erase(nick);
 565         ServerInstance->Users->uuidlist->erase(uuid);
 566         return User::cull();
 567 }
 568
 569 void User::Oper(OperInfo* info)
 570 {
 571         if (this->IsModeSet('o'))
 572                 this->UnOper();
 573
 574         this->modes[UM_OPERATOR] = 1;
 575         this->oper = info;
 576         this->WriteServ("MODE %s :+o", this->nick.c_str());
 577         FOREACH_MOD(I_OnOper, OnOper(this, info->name));
 578
 579         std::string opername;
 580         if (info->oper_block)
 581                 opername = info->oper_block->getString("name");
 582
 583         if (IS_LOCAL(this))
 584         {
 585                 LocalUser* l = IS_LOCAL(this);
 586                 std::string vhost = oper->getConfig("vhost");
 587                 if (!vhost.empty())
 588                         l->ChangeDisplayedHost(vhost.c_str());
 589                 std::string opClass = oper->getConfig("class");
 590                 if (!opClass.empty())
 591                         l->SetClass(opClass);
 592         }
 593
 594         ServerInstance->SNO->WriteToSnoMask('o',"%s (%s@%s) is now an IRC operator of type %s (using oper '%s')",
 595                 nick.c_str(), ident.c_str(), host.c_str(), oper->NameStr(), opername.c_str());
 596         this->WriteNumeric(381, "%s :You are now %s %s", nick.c_str(), strchr("aeiouAEIOU", oper->name[0]) ? "an" : "a", oper->NameStr());
 597
 598         ServerInstance->Logs->Log("OPER", DEFAULT, "%s opered as type: %s", GetFullRealHost().c_str(), oper->NameStr());
 599         ServerInstance->Users->all_opers.push_back(this);
 600
 601         // Expand permissions from config for faster lookup
 602         if (IS_LOCAL(this))
 603                 oper->init();
 604
 605         FOREACH_MOD(I_OnPostOper,OnPostOper(this, oper->name, opername));
 606 }
 607
 608 void OperInfo::init()
 609 {
 610         AllowedOperCommands.clear();
 611         AllowedPrivs.clear();
 612         AllowedUserModes.reset();
 613         AllowedChanModes.reset();
 614         AllowedUserModes['o' - 'A'] = true; // Call me paranoid if you want.
 615
 616         for(std::vector<reference<ConfigTag> >::iterator iter = class_blocks.begin(); iter != class_blocks.end(); ++iter)
 617         {
 618                 ConfigTag* tag = *iter;
 619                 std::string mycmd, mypriv;
 620                 /* Process commands */
 621                 irc::spacesepstream CommandList(tag->getString("commands"));
 622                 while (CommandList.GetToken(mycmd))
 623                 {
 624                         AllowedOperCommands.insert(mycmd);
 625                 }
 626
 627                 irc::spacesepstream PrivList(tag->getString("privs"));
 628                 while (PrivList.GetToken(mypriv))
 629                 {
 630                         AllowedPrivs.insert(mypriv);
 631                 }
 632
 633                 std::string modes = tag->getString("usermodes");
 634                 for (std::string::const_iterator c = modes.begin(); c != modes.end(); ++c)
 635                 {
 636                         if (*c == '*')
 637                         {
 638                                 this->AllowedUserModes.set();
 639                         }
 640                         else if (*c >= 'A' && *c <= 'z')
 641                         {
 642                                 this->AllowedUserModes[*c - 'A'] = true;
 643                         }
 644                 }
 645
 646                 modes = tag->getString("chanmodes");
 647                 for (std::string::const_iterator c = modes.begin(); c != modes.end(); ++c)
 648                 {
 649                         if (*c == '*')
 650                         {
 651                                 this->AllowedChanModes.set();
 652                         }
 653                         else if (*c >= 'A' && *c <= 'z')
 654                         {
 655                                 this->AllowedChanModes[*c - 'A'] = true;
 656                         }
 657                 }
 658         }
 659 }
 660
 661 void User::UnOper()
 662 {
 663         if (!IS_OPER(this))
 664                 return;
 665
 666         /*
 667          * unset their oper type (what IS_OPER checks).
 668          * note, order is important - this must come before modes as -o attempts
 669          * to call UnOper. -- w00t
 670          */
 671         oper = NULL;
 672
 673
 674         /* Remove all oper only modes from the user when the deoper - Bug #466*/
 675         std::string moderemove("-");
 676
 677         for (unsigned char letter = 'A'; letter <= 'z'; letter++)
 678         {
 679                 ModeHandler* mh = ServerInstance->Modes->FindMode(letter, MODETYPE_USER);
 680                 if (mh && mh->NeedsOper())
 681                         moderemove += letter;
 682         }
 683
 684
 685         std::vector<std::string> parameters;
 686         parameters.push_back(this->nick);
 687         parameters.push_back(moderemove);
 688
 689         ServerInstance->Parser->CallHandler("MODE", parameters, this);
 690
 691         /* remove the user from the oper list. Will remove multiple entries as a safeguard against bug #404 */
 692         ServerInstance->Users->all_opers.remove(this);
 693
 694         this->modes[UM_OPERATOR] = 0;
 695 }
 696
 697 /* adds or updates an entry in the whowas list */
 698 void User::AddToWhoWas()
 699 {
 700         Module* whowas = ServerInstance->Modules->Find("cmd_whowas.so");
 701         if (whowas)
 702         {
 703                 WhowasRequest req(NULL, whowas, WhowasRequest::WHOWAS_ADD);
 704                 req.user = this;
 705                 req.Send();
 706         }
 707 }
 708
 709 /*
 710  * Check class restrictions
 711  */
 712 void LocalUser::CheckClass()
 713 {
 714         ConnectClass* a = this->MyClass;
 715
 716         if (!a)
 717         {
 718                 ServerInstance->Users->QuitUser(this, "Access denied by configuration");
 719                 return;
 720         }
 721         else if (a->type == CC_DENY)
 722         {
 723                 ServerInstance->Users->QuitUser(this, a->config->getString("reason", "Unauthorised connection"));
 724                 return;
 725         }
 726         else if ((a->GetMaxLocal()) && (ServerInstance->Users->LocalCloneCount(this) > a->GetMaxLocal()))
 727         {
 728                 ServerInstance->Users->QuitUser(this, "No more connections allowed from your host via this connect class (local)");
 729                 if (a->maxconnwarn)
 730                         ServerInstance->SNO->WriteToSnoMask('a', "WARNING: maximum LOCAL connections (%ld) exceeded for IP %s", a->GetMaxLocal(), this->GetIPString());
 731                 return;
 732         }
 733         else if ((a->GetMaxGlobal()) && (ServerInstance->Users->GlobalCloneCount(this) > a->GetMaxGlobal()))
 734         {
 735                 ServerInstance->Users->QuitUser(this, "No more connections allowed from your host via this connect class (global)");
 736                 if (a->maxconnwarn)
 737                         ServerInstance->SNO->WriteToSnoMask('a', "WARNING: maximum GLOBAL connections (%ld) exceeded for IP %s", a->GetMaxGlobal(), this->GetIPString());
 738                 return;
 739         }
 740
 741         this->nping = ServerInstance->Time() + a->GetPingTime() + ServerInstance->Config->dns_timeout;
 742 }
 743
 744 bool User::CheckLines(bool doZline)
 745 {
 746         const char* check[] = { "G" , "K", (doZline) ? "Z" : NULL, NULL };
 747
 748         if (!this->exempt)
 749         {
 750                 for (int n = 0; check[n]; ++n)
 751                 {
 752                         XLine *r = ServerInstance->XLines->MatchesLine(check[n], this);
 753
 754                         if (r)
 755                         {
 756                                 r->Apply(this);
 757                                 return true;
 758                         }
 759                 }
 760         }
 761
 762         return false;
 763 }
 764
 765 void LocalUser::FullConnect()
 766 {
 767         ServerInstance->stats->statsConnects++;
 768         this->idle_lastmsg = ServerInstance->Time();
 769
 770         /*
 771          * You may be thinking "wtf, we checked this in User::AddClient!" - and yes, we did, BUT.
 772          * At the time AddClient is called, we don't have a resolved host, by here we probably do - which
 773          * may put the user into a totally seperate class with different restrictions! so we *must* check again.
 774          * Don't remove this! -- w00t
 775          */
 776         MyClass = NULL;
 777         SetClass();
 778         CheckClass();
 779         CheckLines();
 780
 781         if (quitting)
 782                 return;
 783
 784         if (ServerInstance->Config->WelcomeNotice)
 785                 this->WriteServ("NOTICE Auth :Welcome to \002%s\002!",ServerInstance->Config->Network.c_str());
 786         this->WriteNumeric(RPL_WELCOME, "%s :Welcome to the %s IRC Network %s",this->nick.c_str(), ServerInstance->Config->Network.c_str(), GetFullRealHost().c_str());
 787         this->WriteNumeric(RPL_YOURHOSTIS, "%s :Your host is %s, running version %s",this->nick.c_str(),ServerInstance->Config->ServerName.c_str(),BRANCH);
 788         this->WriteNumeric(RPL_SERVERCREATED, "%s :This server was created %s %s", this->nick.c_str(), __TIME__, __DATE__);
 789
 790         std::string umlist = ServerInstance->Modes->UserModeList();
 791         std::string cmlist = ServerInstance->Modes->ChannelModeList();
 792         std::string pmlist = ServerInstance->Modes->ParaModeList();
 793         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());
 794
 795         ServerInstance->Config->Send005(this);
 796         this->WriteNumeric(RPL_YOURUUID, "%s %s :your unique ID", this->nick.c_str(), this->uuid.c_str());
 797
 798         /* Now registered */
 799         if (ServerInstance->Users->unregistered_count)
 800                 ServerInstance->Users->unregistered_count--;
 801
 802         /* Trigger MOTD and LUSERS output, give modules a chance too */
 803         ModResult MOD_RESULT;
 804         std::string command("MOTD");
 805         std::vector<std::string> parameters;
 806         FIRST_MOD_RESULT(OnPreCommand, MOD_RESULT, (command, parameters, this, true, command));
 807         if (!MOD_RESULT)
 808                 ServerInstance->Parser->CallHandler(command, parameters, this);
 809
 810         MOD_RESULT = MOD_RES_PASSTHRU;
 811         command = "LUSERS";
 812         FIRST_MOD_RESULT(OnPreCommand, MOD_RESULT, (command, parameters, this, true, command));
 813         if (!MOD_RESULT)
 814                 ServerInstance->Parser->CallHandler(command, parameters, this);
 815
 816         if (ServerInstance->Config->RawLog)
 817                 WriteServ("PRIVMSG %s :*** Raw I/O logging is enabled on this server. All messages, passwords, and commands are being recorded.", nick.c_str());
 818
 819         /*
 820          * We don't set REG_ALL until triggering OnUserConnect, so some module events don't spew out stuff
 821          * for a user that doesn't exist yet.
 822          */
 823         FOREACH_MOD(I_OnUserConnect,OnUserConnect(this));
 824
 825         this->registered = REG_ALL;
 826
 827         FOREACH_MOD(I_OnPostConnect,OnPostConnect(this));
 828
 829         ServerInstance->SNO->WriteToSnoMask('c',"Client connecting on port %d (class %s): %s (%s) [%s]",
 830                 this->GetServerPort(), this->MyClass->name.c_str(), GetFullRealHost().c_str(), this->GetIPString(), this->fullname.c_str());
 831         ServerInstance->Logs->Log("BANCACHE", DEBUG, "BanCache: Adding NEGATIVE hit for %s", this->GetIPString());
 832         ServerInstance->BanCache->AddHit(this->GetIPString(), "", "");
 833         // reset the flood penalty (which could have been raised due to things like auto +x)
 834         CommandFloodPenalty = 0;
 835 }
 836
 837 void User::InvalidateCache()
 838 {
 839         /* Invalidate cache */
 840         cachedip.clear();
 841         cached_fullhost.clear();
 842         cached_hostip.clear();
 843         cached_makehost.clear();
 844         cached_fullrealhost.clear();
 845 }
 846
 847 bool User::ChangeNick(const std::string& newnick, bool force)
 848 {
 849         if (quitting)
 850         {
 851                 ServerInstance->Logs->Log("USERS", DEFAULT, "ERROR: Attempted to change nick of a quitting user: " + this->nick);
 852                 return false;
 853         }
 854
 855         ModResult MOD_RESULT;
 856
 857         if (force)
 858                 ServerInstance->NICKForced.set(this, 1);
 859         FIRST_MOD_RESULT(OnUserPreNick, MOD_RESULT, (this, newnick));
 860         ServerInstance->NICKForced.set(this, 0);
 861
 862         if (MOD_RESULT == MOD_RES_DENY)
 863         {
 864                 ServerInstance->stats->statsCollisions++;
 865                 return false;
 866         }
 867
 868         if (assign(newnick) == assign(nick))
 869         {
 870                 // case change, don't need to check Q:lines and such
 871                 // and, if it's identical including case, we can leave right now
 872                 if (newnick == nick)
 873                         return true;
 874         }
 875         else
 876         {
 877                 /*
 878                  * Don't check Q:Lines if it's a server-enforced change, just on the off-chance some fucking *moron*
 879                  * tries to Q:Line SIDs, also, this means we just get our way period, as it really should be.
 880                  * Thanks Kein for finding this. -- w00t
 881                  *
 882                  * Also don't check Q:Lines for remote nickchanges, they should have our Q:Lines anyway to enforce themselves.
 883                  *              -- w00t
 884                  */
 885                 if (IS_LOCAL(this) && !force)
 886                 {
 887                         XLine* mq = ServerInstance->XLines->MatchesLine("Q",newnick);
 888                         if (mq)
 889                         {
 890                                 if (this->registered == REG_ALL)
 891                                 {
 892                                         ServerInstance->SNO->WriteGlobalSno('a', "Q-Lined nickname %s from %s: %s",
 893                                                 newnick.c_str(), GetFullRealHost().c_str(), mq->reason.c_str());
 894                                 }
 895                                 this->WriteNumeric(432, "%s %s :Invalid nickname: %s",this->nick.c_str(), newnick.c_str(), mq->reason.c_str());
 896                                 return false;
 897                         }
 898
 899                         if (ServerInstance->Config->RestrictBannedUsers)
 900                         {
 901                                 for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
 902                                 {
 903                                         Channel *chan = *i;
 904                                         if (chan->GetPrefixValue(this) < VOICE_VALUE && chan->IsBanned(this))
 905                                         {
 906                                                 this->WriteNumeric(404, "%s %s :Cannot send to channel (you're banned)", this->nick.c_str(), chan->name.c_str());
 907                                                 return false;
 908                                         }
 909                                 }
 910                         }
 911                 }
 912
 913                 /*
 914                  * Uh oh.. if the nickname is in use, and it's not in use by the person using it (doh) --
 915                  * then we have a potential collide. Check whether someone else is camping on the nick
 916                  * (i.e. connect -> send NICK, don't send USER.) If they are camping, force-change the
 917                  * camper to their UID, and allow the incoming nick change.
 918                  *
 919                  * If the guy using the nick is already using it, tell the incoming nick change to gtfo,
 920                  * because the nick is already (rightfully) in use. -- w00t
 921                  */
 922                 User* InUse = ServerInstance->FindNickOnly(newnick);
 923                 if (InUse && (InUse != this))
 924                 {
 925                         if (InUse->registered != REG_ALL)
 926                         {
 927                                 /* force the camper to their UUID, and ask them to re-send a NICK. */
 928                                 InUse->WriteTo(InUse, "NICK %s", InUse->uuid.c_str());
 929                                 InUse->WriteNumeric(433, "%s %s :Nickname overruled.", InUse->nick.c_str(), InUse->nick.c_str());
 930
 931                                 ServerInstance->Users->clientlist->erase(InUse->nick);
 932                                 (*(ServerInstance->Users->clientlist))[InUse->uuid] = InUse;
 933
 934                                 InUse->nick = InUse->uuid;
 935                                 InUse->InvalidateCache();
 936                                 InUse->registered &= ~REG_NICK;
 937                         }
 938                         else
 939                         {
 940                                 /* No camping, tell the incoming user  to stop trying to change nick ;p */
 941                                 this->WriteNumeric(433, "%s %s :Nickname is already in use.", this->registered >= REG_NICK ? this->nick.c_str() : "*", newnick.c_str());
 942                                 return false;
 943                         }
 944                 }
 945         }
 946
 947         if (this->registered == REG_ALL)
 948                 this->WriteCommon("NICK %s",newnick.c_str());
 949         std::string oldnick = nick;
 950         nick = newnick;
 951
 952         InvalidateCache();
 953         ServerInstance->Users->clientlist->erase(oldnick);
 954         (*(ServerInstance->Users->clientlist))[newnick] = this;
 955
 956         if (registered == REG_ALL)
 957                 FOREACH_MOD(I_OnUserPostNick,OnUserPostNick(this,oldnick));
 958
 959         return true;
 960 }
 961
 962 int LocalUser::GetServerPort()
 963 {
 964         switch (this->server_sa.sa.sa_family)
 965         {
 966                 case AF_INET6:
 967                         return htons(this->server_sa.in6.sin6_port);
 968                 case AF_INET:
 969                         return htons(this->server_sa.in4.sin_port);
 970         }
 971         return 0;
 972 }
 973
 974 const char* User::GetIPString()
 975 {
 976         int port;
 977         if (cachedip.empty())
 978         {
 979                 irc::sockets::satoap(client_sa, cachedip, port);
 980                 /* IP addresses starting with a : on irc are a Bad Thing (tm) */
 981                 if (cachedip.c_str()[0] == ':')
 982                         cachedip.insert(cachedip.begin(),1,'0');
 983         }
 984
 985         return cachedip.c_str();
 986 }
 987
 988 irc::sockets::cidr_mask User::GetCIDRMask()
 989 {
 990         int range = 0;
 991         switch (client_sa.sa.sa_family)
 992         {
 993                 case AF_INET6:
 994                         range = ServerInstance->Config->c_ipv6_range;
 995                         break;
 996                 case AF_INET:
 997                         range = ServerInstance->Config->c_ipv4_range;
 998                         break;
 999         }
1000         return irc::sockets::cidr_mask(client_sa, range);
1001 }
1002
1003 bool User::SetClientIP(const char* sip, bool recheck_eline)
1004 {
1005         this->InvalidateCache();
1006         return irc::sockets::aptosa(sip, 0, client_sa);
1007 }
1008
1009 void User::SetClientIP(const irc::sockets::sockaddrs& sa, bool recheck_eline)
1010 {
1011         this->InvalidateCache();
1012         memcpy(&client_sa, &sa, sizeof(irc::sockets::sockaddrs));
1013 }
1014
1015 bool LocalUser::SetClientIP(const char* sip, bool recheck_eline)
1016 {
1017         irc::sockets::sockaddrs sa;
1018         if (!irc::sockets::aptosa(sip, 0, sa))
1019                 // Invalid
1020                 return false;
1021
1022         LocalUser::SetClientIP(sa, recheck_eline);
1023         return true;
1024 }
1025
1026 void LocalUser::SetClientIP(const irc::sockets::sockaddrs& sa, bool recheck_eline)
1027 {
1028         if (sa != client_sa)
1029         {
1030                 User::SetClientIP(sa);
1031                 if (recheck_eline)
1032                         this->exempt = (ServerInstance->XLines->MatchesLine("E", this) != NULL);
1033
1034                 FOREACH_MOD(I_OnSetUserIP,OnSetUserIP(this));
1035         }
1036 }
1037
1038 static std::string wide_newline("\r\n");
1039
1040 void User::Write(const std::string& text)
1041 {
1042 }
1043
1044 void User::Write(const char *text, ...)
1045 {
1046 }
1047
1048 void LocalUser::Write(const std::string& text)
1049 {
1050         if (!ServerInstance->SE->BoundsCheckFd(&eh))
1051                 return;
1052
1053         if (text.length() > MAXBUF - 2)
1054         {
1055                 // this should happen rarely or never. Crop the string at 512 and try again.
1056                 std::string try_again = text.substr(0, MAXBUF - 2);
1057                 Write(try_again);
1058                 return;
1059         }
1060
1061         ServerInstance->Logs->Log("USEROUTPUT", RAWIO, "C[%s] O %s", uuid.c_str(), text.c_str());
1062
1063         eh.AddWriteBuf(text);
1064         eh.AddWriteBuf(wide_newline);
1065
1066         ServerInstance->stats->statsSent += text.length() + 2;
1067         this->bytes_out += text.length() + 2;
1068         this->cmds_out++;
1069 }
1070
1071 /** Write()
1072  */
1073 void LocalUser::Write(const char *text, ...)
1074 {
1075         va_list argsPtr;
1076         char textbuffer[MAXBUF];
1077
1078         va_start(argsPtr, text);
1079         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1080         va_end(argsPtr);
1081
1082         this->Write(std::string(textbuffer));
1083 }
1084
1085 void User::WriteServ(const std::string& text)
1086 {
1087         this->Write(":%s %s",ServerInstance->Config->ServerName.c_str(),text.c_str());
1088 }
1089
1090 /** WriteServ()
1091  *  Same as Write(), except `text' is prefixed with `:server.name '.
1092  */
1093 void User::WriteServ(const char* text, ...)
1094 {
1095         va_list argsPtr;
1096         char textbuffer[MAXBUF];
1097
1098         va_start(argsPtr, text);
1099         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1100         va_end(argsPtr);
1101
1102         this->WriteServ(std::string(textbuffer));
1103 }
1104
1105
1106 void User::WriteNumeric(unsigned int numeric, const char* text, ...)
1107 {
1108         va_list argsPtr;
1109         char textbuffer[MAXBUF];
1110
1111         va_start(argsPtr, text);
1112         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1113         va_end(argsPtr);
1114
1115         this->WriteNumeric(numeric, std::string(textbuffer));
1116 }
1117
1118 void User::WriteNumeric(unsigned int numeric, const std::string &text)
1119 {
1120         char textbuffer[MAXBUF];
1121         ModResult MOD_RESULT;
1122
1123         FIRST_MOD_RESULT(OnNumeric, MOD_RESULT, (this, numeric, text));
1124
1125         if (MOD_RESULT == MOD_RES_DENY)
1126                 return;
1127
1128         snprintf(textbuffer,MAXBUF,":%s %03u %s",ServerInstance->Config->ServerName.c_str(), numeric, text.c_str());
1129         this->Write(std::string(textbuffer));
1130 }
1131
1132 void User::WriteFrom(User *user, const std::string &text)
1133 {
1134         char tb[MAXBUF];
1135
1136         snprintf(tb,MAXBUF,":%s %s",user->GetFullHost().c_str(),text.c_str());
1137
1138         this->Write(std::string(tb));
1139 }
1140
1141
1142 /* write text from an originating user to originating user */
1143
1144 void User::WriteFrom(User *user, const char* text, ...)
1145 {
1146         va_list argsPtr;
1147         char textbuffer[MAXBUF];
1148
1149         va_start(argsPtr, text);
1150         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1151         va_end(argsPtr);
1152
1153         this->WriteFrom(user, std::string(textbuffer));
1154 }
1155
1156
1157 /* write text to an destination user from a source user (e.g. user privmsg) */
1158
1159 void User::WriteTo(User *dest, const char *data, ...)
1160 {
1161         char textbuffer[MAXBUF];
1162         va_list argsPtr;
1163
1164         va_start(argsPtr, data);
1165         vsnprintf(textbuffer, MAXBUF, data, argsPtr);
1166         va_end(argsPtr);
1167
1168         this->WriteTo(dest, std::string(textbuffer));
1169 }
1170
1171 void User::WriteTo(User *dest, const std::string &data)
1172 {
1173         dest->WriteFrom(this, data);
1174 }
1175
1176 void User::WriteCommon(const char* text, ...)
1177 {
1178         char textbuffer[MAXBUF];
1179         va_list argsPtr;
1180
1181         if (this->registered != REG_ALL || quitting)
1182                 return;
1183
1184         int len = snprintf(textbuffer,MAXBUF,":%s ",this->GetFullHost().c_str());
1185
1186         va_start(argsPtr, text);
1187         vsnprintf(textbuffer + len, MAXBUF - len, text, argsPtr);
1188         va_end(argsPtr);
1189
1190         this->WriteCommonRaw(std::string(textbuffer), true);
1191 }
1192
1193 void User::WriteCommonExcept(const char* text, ...)
1194 {
1195         char textbuffer[MAXBUF];
1196         va_list argsPtr;
1197
1198         if (this->registered != REG_ALL || quitting)
1199                 return;
1200
1201         int len = snprintf(textbuffer,MAXBUF,":%s ",this->GetFullHost().c_str());
1202
1203         va_start(argsPtr, text);
1204         vsnprintf(textbuffer + len, MAXBUF - len, text, argsPtr);
1205         va_end(argsPtr);
1206
1207         this->WriteCommonRaw(std::string(textbuffer), false);
1208 }
1209
1210 void User::WriteCommonRaw(const std::string &line, bool include_self)
1211 {
1212         if (this->registered != REG_ALL || quitting)
1213                 return;
1214
1215         LocalUser::already_sent_id++;
1216
1217         UserChanList include_c(chans);
1218         std::map<User*,bool> exceptions;
1219
1220         exceptions[this] = include_self;
1221
1222         FOREACH_MOD(I_OnBuildNeighborList,OnBuildNeighborList(this, include_c, exceptions));
1223
1224         for (std::map<User*,bool>::iterator i = exceptions.begin(); i != exceptions.end(); ++i)
1225         {
1226                 LocalUser* u = IS_LOCAL(i->first);
1227                 if (u && !u->quitting)
1228                 {
1229                         u->already_sent = LocalUser::already_sent_id;
1230                         if (i->second)
1231                                 u->Write(line);
1232                 }
1233         }
1234         for (UCListIter v = include_c.begin(); v != include_c.end(); ++v)
1235         {
1236                 Channel* c = *v;
1237                 const UserMembList* ulist = c->GetUsers();
1238                 for (UserMembList::const_iterator i = ulist->begin(); i != ulist->end(); i++)
1239                 {
1240                         LocalUser* u = IS_LOCAL(i->first);
1241                         if (u && !u->quitting && u->already_sent != LocalUser::already_sent_id)
1242                         {
1243                                 u->already_sent = LocalUser::already_sent_id;
1244                                 u->Write(line);
1245                         }
1246                 }
1247         }
1248 }
1249
1250 void User::WriteCommonQuit(const std::string &normal_text, const std::string &oper_text)
1251 {
1252         char tb1[MAXBUF];
1253         char tb2[MAXBUF];
1254
1255         if (this->registered != REG_ALL)
1256                 return;
1257
1258         already_sent_t uniq_id = ++LocalUser::already_sent_id;
1259
1260         snprintf(tb1,MAXBUF,":%s QUIT :%s",this->GetFullHost().c_str(),normal_text.c_str());
1261         snprintf(tb2,MAXBUF,":%s QUIT :%s",this->GetFullHost().c_str(),oper_text.c_str());
1262         std::string out1 = tb1;
1263         std::string out2 = tb2;
1264
1265         UserChanList include_c(chans);
1266         std::map<User*,bool> exceptions;
1267
1268         FOREACH_MOD(I_OnBuildNeighborList,OnBuildNeighborList(this, include_c, exceptions));
1269
1270         for (std::map<User*,bool>::iterator i = exceptions.begin(); i != exceptions.end(); ++i)
1271         {
1272                 LocalUser* u = IS_LOCAL(i->first);
1273                 if (u && !u->quitting)
1274                 {
1275                         u->already_sent = uniq_id;
1276                         if (i->second)
1277                                 u->Write(IS_OPER(u) ? out2 : out1);
1278                 }
1279         }
1280         for (UCListIter v = include_c.begin(); v != include_c.end(); ++v)
1281         {
1282                 const UserMembList* ulist = (*v)->GetUsers();
1283                 for (UserMembList::const_iterator i = ulist->begin(); i != ulist->end(); i++)
1284                 {
1285                         LocalUser* u = IS_LOCAL(i->first);
1286                         if (u && !u->quitting && (u->already_sent != uniq_id))
1287                         {
1288                                 u->already_sent = uniq_id;
1289                                 u->Write(IS_OPER(u) ? out2 : out1);
1290                         }
1291                 }
1292         }
1293 }
1294
1295 void LocalUser::SendText(const std::string& line)
1296 {
1297         Write(line);
1298 }
1299
1300 void RemoteUser::SendText(const std::string& line)
1301 {
1302         ServerInstance->PI->PushToClient(this, line);
1303 }
1304
1305 void FakeUser::SendText(const std::string& line)
1306 {
1307 }
1308
1309 void User::SendText(const char *text, ...)
1310 {
1311         va_list argsPtr;
1312         char line[MAXBUF];
1313
1314         va_start(argsPtr, text);
1315         vsnprintf(line, MAXBUF, text, argsPtr);
1316         va_end(argsPtr);
1317
1318         SendText(std::string(line));
1319 }
1320
1321 void User::SendText(const std::string &LinePrefix, std::stringstream &TextStream)
1322 {
1323         std::string line;
1324         std::string Word;
1325         while (TextStream >> Word)
1326         {
1327                 size_t lineLength = LinePrefix.length() + line.length() + Word.length() + 13;
1328                 if (lineLength > MAXBUF)
1329                 {
1330                         SendText(LinePrefix + line);
1331                         line.clear();
1332                 }
1333                 line += " " + Word;
1334         }
1335         SendText(LinePrefix + line);
1336 }
1337
1338 /* return 0 or 1 depending if users u and u2 share one or more common channels
1339  * (used by QUIT, NICK etc which arent channel specific notices)
1340  *
1341  * The old algorithm in 1.0 for this was relatively inefficient, iterating over
1342  * the first users channels then the second users channels within the outer loop,
1343  * therefore it was a maximum of x*y iterations (upon returning 0 and checking
1344  * all possible iterations). However this new function instead checks against the
1345  * channel's userlist in the inner loop which is a std::map<User*,User*>
1346  * and saves us time as we already know what pointer value we are after.
1347  * Don't quote me on the maths as i am not a mathematician or computer scientist,
1348  * but i believe this algorithm is now x+(log y) maximum iterations instead.
1349  */
1350 bool User::SharesChannelWith(User *other)
1351 {
1352         if ((!other) || (this->registered != REG_ALL) || (other->registered != REG_ALL))
1353                 return false;
1354
1355         /* Outer loop */
1356         for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1357         {
1358                 /* Eliminate the inner loop (which used to be ~equal in size to the outer loop)
1359                  * by replacing it with a map::find which *should* be more efficient
1360                  */
1361                 if ((*i)->HasUser(other))
1362                         return true;
1363         }
1364         return false;
1365 }
1366
1367 bool User::ChangeName(const char* gecos)
1368 {
1369         if (!this->fullname.compare(gecos))
1370                 return true;
1371
1372         if (IS_LOCAL(this))
1373         {
1374                 ModResult MOD_RESULT;
1375                 FIRST_MOD_RESULT(OnChangeLocalUserGECOS, MOD_RESULT, (IS_LOCAL(this),gecos));
1376                 if (MOD_RESULT == MOD_RES_DENY)
1377                         return false;
1378                 FOREACH_MOD(I_OnChangeName,OnChangeName(this,gecos));
1379         }
1380         this->fullname.assign(gecos, 0, ServerInstance->Config->Limits.MaxGecos);
1381
1382         return true;
1383 }
1384
1385 void User::DoHostCycle(const std::string &quitline)
1386 {
1387         char buffer[MAXBUF];
1388
1389         if (!ServerInstance->Config->CycleHosts)
1390                 return;
1391
1392         already_sent_t silent_id = ++LocalUser::already_sent_id;
1393         already_sent_t seen_id = ++LocalUser::already_sent_id;
1394
1395         UserChanList include_c(chans);
1396         std::map<User*,bool> exceptions;
1397
1398         FOREACH_MOD(I_OnBuildNeighborList,OnBuildNeighborList(this, include_c, exceptions));
1399
1400         // Users shouldn't see themselves quitting when host cycling
1401         exceptions.erase(this);
1402         for (std::map<User*,bool>::iterator i = exceptions.begin(); i != exceptions.end(); ++i)
1403         {
1404                 LocalUser* u = IS_LOCAL(i->first);
1405                 if (u && !u->quitting)
1406                 {
1407                         if (i->second)
1408                         {
1409                                 u->already_sent = seen_id;
1410                                 u->Write(quitline);
1411                         }
1412                         else
1413                         {
1414                                 u->already_sent = silent_id;
1415                         }
1416                 }
1417         }
1418         for (UCListIter v = include_c.begin(); v != include_c.end(); ++v)
1419         {
1420                 Channel* c = *v;
1421                 snprintf(buffer, MAXBUF, ":%s JOIN %s", GetFullHost().c_str(), c->name.c_str());
1422                 std::string joinline(buffer);
1423                 Membership* memb = c->GetUser(this);
1424                 std::string modeline = memb->modes;
1425                 if (modeline.length() > 0)
1426                 {
1427                         for(unsigned int i=0; i < memb->modes.length(); i++)
1428                                 modeline.append(" ").append(nick);
1429                         snprintf(buffer, MAXBUF, ":%s MODE %s +%s",
1430                                 ServerInstance->Config->CycleHostsFromUser ? GetFullHost().c_str() : ServerInstance->Config->ServerName.c_str(),
1431                                 c->name.c_str(), modeline.c_str());
1432                         modeline = buffer;
1433                 }
1434
1435                 const UserMembList *ulist = c->GetUsers();
1436                 for (UserMembList::const_iterator i = ulist->begin(); i != ulist->end(); i++)
1437                 {
1438                         LocalUser* u = IS_LOCAL(i->first);
1439                         if (u == NULL || u == this)
1440                                 continue;
1441                         if (u->already_sent == silent_id)
1442                                 continue;
1443
1444                         if (u->already_sent != seen_id)
1445                         {
1446                                 u->Write(quitline);
1447                                 u->already_sent = seen_id;
1448                         }
1449                         u->Write(joinline);
1450                         if (modeline.length() > 0)
1451                                 u->Write(modeline);
1452                 }
1453         }
1454 }
1455
1456 bool User::ChangeDisplayedHost(const char* shost)
1457 {
1458         if (dhost == shost)
1459                 return true;
1460
1461         if (IS_LOCAL(this))
1462         {
1463                 ModResult MOD_RESULT;
1464                 FIRST_MOD_RESULT(OnChangeLocalUserHost, MOD_RESULT, (IS_LOCAL(this),shost));
1465                 if (MOD_RESULT == MOD_RES_DENY)
1466                         return false;
1467         }
1468
1469         FOREACH_MOD(I_OnChangeHost, OnChangeHost(this,shost));
1470
1471         std::string quitstr = ":" + GetFullHost() + " QUIT :Changing host";
1472
1473         /* Fix by Om: User::dhost is 65 long, this was truncating some long hosts */
1474         this->dhost.assign(shost, 0, 64);
1475
1476         this->InvalidateCache();
1477
1478         this->DoHostCycle(quitstr);
1479
1480         if (IS_LOCAL(this))
1481                 this->WriteNumeric(RPL_YOURDISPLAYEDHOST, "%s %s :is now your displayed host",this->nick.c_str(),this->dhost.c_str());
1482
1483         return true;
1484 }
1485
1486 bool User::ChangeIdent(const char* newident)
1487 {
1488         if (this->ident == newident)
1489                 return true;
1490
1491         FOREACH_MOD(I_OnChangeIdent, OnChangeIdent(this,newident));
1492
1493         std::string quitstr = ":" + GetFullHost() + " QUIT :Changing ident";
1494
1495         this->ident.assign(newident, 0, ServerInstance->Config->Limits.IdentMax);
1496
1497         this->InvalidateCache();
1498
1499         this->DoHostCycle(quitstr);
1500
1501         return true;
1502 }
1503
1504 void User::SendAll(const char* command, const char* text, ...)
1505 {
1506         char textbuffer[MAXBUF];
1507         char formatbuffer[MAXBUF];
1508         va_list argsPtr;
1509
1510         va_start(argsPtr, text);
1511         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1512         va_end(argsPtr);
1513
1514         snprintf(formatbuffer,MAXBUF,":%s %s $* :%s", this->GetFullHost().c_str(), command, textbuffer);
1515         std::string fmt = formatbuffer;
1516
1517         for (LocalUserList::const_iterator i = ServerInstance->Users->local_users.begin(); i != ServerInstance->Users->local_users.end(); i++)
1518         {
1519                 if ((*i)->registered == REG_ALL)
1520                         (*i)->Write(fmt);
1521         }
1522 }
1523
1524
1525 std::string User::ChannelList(User* source, bool spy)
1526 {
1527         std::string list;
1528
1529         for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1530         {
1531                 Channel* c = *i;
1532                 /* If the target is the sender, neither +p nor +s is set, or
1533                  * the channel contains the user, it is not a spy channel
1534                  */
1535                 if (spy != (source == this || !(c->IsModeSet('p') || c->IsModeSet('s')) || c->HasUser(source)))
1536                         list.append(c->GetPrefixChar(this)).append(c->name).append(" ");
1537         }
1538
1539         return list;
1540 }
1541
1542 void User::SplitChanList(User* dest, const std::string &cl)
1543 {
1544         std::string line;
1545         std::ostringstream prefix;
1546         std::string::size_type start, pos;
1547
1548         prefix << this->nick << " " << dest->nick << " :";
1549         line = prefix.str();
1550         int namelen = ServerInstance->Config->ServerName.length() + 6;
1551
1552         for (start = 0; (pos = cl.find(' ', start)) != std::string::npos; start = pos+1)
1553         {
1554                 if (line.length() + namelen + pos - start > 510)
1555                 {
1556                         ServerInstance->SendWhoisLine(this, dest, 319, "%s", line.c_str());
1557                         line = prefix.str();
1558                 }
1559
1560                 line.append(cl.substr(start, pos - start + 1));
1561         }
1562
1563         if (line.length() != prefix.str().length())
1564         {
1565                 ServerInstance->SendWhoisLine(this, dest, 319, "%s", line.c_str());
1566         }
1567 }
1568
1569 /*
1570  * Sets a user's connection class.
1571  * If the class name is provided, it will be used. Otherwise, the class will be guessed using host/ip/ident/etc.
1572  * NOTE: If the <ALLOW> or <DENY> tag specifies an ip, and this user resolves,
1573  * then their ip will be taken as 'priority' anyway, so for example,
1574  * <connect allow="127.0.0.1"> will match joe!bloggs@localhost
1575  */
1576 void LocalUser::SetClass(const std::string &explicit_name)
1577 {
1578         ConnectClass *found = NULL;
1579
1580         ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Setting connect class for UID %s", this->uuid.c_str());
1581
1582         if (!explicit_name.empty())
1583         {
1584                 for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++)
1585                 {
1586                         ConnectClass* c = *i;
1587
1588                         if (explicit_name == c->name)
1589                         {
1590                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Explicitly set to %s", explicit_name.c_str());
1591                                 found = c;
1592                         }
1593                 }
1594         }
1595         else
1596         {
1597                 for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++)
1598                 {
1599                         ConnectClass* c = *i;
1600                         ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Checking %s", c->GetName().c_str());
1601
1602                         ModResult MOD_RESULT;
1603                         FIRST_MOD_RESULT(OnSetConnectClass, MOD_RESULT, (this,c));
1604                         if (MOD_RESULT == MOD_RES_DENY)
1605                                 continue;
1606                         if (MOD_RESULT == MOD_RES_ALLOW)
1607                         {
1608                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Class forced by module to %s", c->GetName().c_str());
1609                                 found = c;
1610                                 break;
1611                         }
1612
1613                         if (c->type == CC_NAMED)
1614                                 continue;
1615
1616                         bool regdone = (registered != REG_NONE);
1617                         if (c->config->getBool("registered", regdone) != regdone)
1618                                 continue;
1619
1620                         /* check if host matches.. */
1621                         if (!InspIRCd::MatchCIDR(this->GetIPString(), c->GetHost(), NULL) &&
1622                             !InspIRCd::MatchCIDR(this->host, c->GetHost(), NULL))
1623                         {
1624                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "No host match (for %s)", c->GetHost().c_str());
1625                                 continue;
1626                         }
1627
1628                         /*
1629                          * deny change if change will take class over the limit check it HERE, not after we found a matching class,
1630                          * because we should attempt to find another class if this one doesn't match us. -- w00t
1631                          */
1632                         if (c->limit && (c->GetReferenceCount() >= c->limit))
1633                         {
1634                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "OOPS: Connect class limit (%lu) hit, denying", c->limit);
1635                                 continue;
1636                         }
1637
1638                         /* if it requires a port ... */
1639                         int port = c->config->getInt("port");
1640                         if (port)
1641                         {
1642                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Requires port (%d)", port);
1643
1644                                 /* and our port doesn't match, fail. */
1645                                 if (this->GetServerPort() != port)
1646                                         continue;
1647                         }
1648
1649                         if (regdone && !c->config->getString("password").empty())
1650                         {
1651                                 if (ServerInstance->PassCompare(this, c->config->getString("password"), password, c->config->getString("hash")))
1652                                 {
1653                                         ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Bad password, skipping");
1654                                         continue;
1655                                 }
1656                         }
1657
1658                         /* we stop at the first class that meets ALL critera. */
1659                         found = c;
1660                         break;
1661                 }
1662         }
1663
1664         /*
1665          * Okay, assuming we found a class that matches.. switch us into that class, keeping refcounts up to date.
1666          */
1667         if (found)
1668         {
1669                 MyClass = found;
1670         }
1671 }
1672
1673 /* looks up a users password for their connection class (<ALLOW>/<DENY> tags)
1674  * NOTE: If the <ALLOW> or <DENY> tag specifies an ip, and this user resolves,
1675  * then their ip will be taken as 'priority' anyway, so for example,
1676  * <connect allow="127.0.0.1"> will match joe!bloggs@localhost
1677  */
1678 ConnectClass* LocalUser::GetClass()
1679 {
1680         return MyClass;
1681 }
1682
1683 ConnectClass* User::GetClass()
1684 {
1685         return NULL;
1686 }
1687
1688 void User::PurgeEmptyChannels()
1689 {
1690         // firstly decrement the count on each channel
1691         for (UCListIter f = this->chans.begin(); f != this->chans.end(); f++)
1692         {
1693                 Channel* c = *f;
1694                 c->DelUser(this);
1695         }
1696
1697         this->UnOper();
1698 }
1699
1700 const std::string& FakeUser::GetFullHost()
1701 {
1702         if (!ServerInstance->Config->HideWhoisServer.empty())
1703                 return ServerInstance->Config->HideWhoisServer;
1704         return server;
1705 }
1706
1707 const std::string& FakeUser::GetFullRealHost()
1708 {
1709         if (!ServerInstance->Config->HideWhoisServer.empty())
1710                 return ServerInstance->Config->HideWhoisServer;
1711         return server;
1712 }
1713
1714 ConnectClass::ConnectClass(ConfigTag* tag, char t, const std::string& mask)
1715         : config(tag), type(t), fakelag(true), name("unnamed"), registration_timeout(0), host(mask),
1716         pingtime(0), softsendqmax(0), hardsendqmax(0), recvqmax(0),
1717         penaltythreshold(0), commandrate(0), maxlocal(0), maxglobal(0), maxconnwarn(true), maxchans(0), limit(0)
1718 {
1719 }
1720
1721 ConnectClass::ConnectClass(ConfigTag* tag, char t, const std::string& mask, const ConnectClass& parent)
1722         : config(tag), type(t), fakelag(parent.fakelag), name("unnamed"),
1723         registration_timeout(parent.registration_timeout), host(mask), pingtime(parent.pingtime),
1724         softsendqmax(parent.softsendqmax), hardsendqmax(parent.hardsendqmax), recvqmax(parent.recvqmax),
1725         penaltythreshold(parent.penaltythreshold), commandrate(parent.commandrate),
1726         maxlocal(parent.maxlocal), maxglobal(parent.maxglobal), maxconnwarn(parent.maxconnwarn), maxchans(parent.maxchans),
1727         limit(parent.limit)
1728 {
1729 }
1730
1731 void ConnectClass::Update(const ConnectClass* src)
1732 {
1733         config = src->config;
1734         type = src->type;
1735         fakelag = src->fakelag;
1736         name = src->name;
1737         registration_timeout = src->registration_timeout;
1738         host = src->host;
1739         pingtime = src->pingtime;
1740         softsendqmax = src->softsendqmax;
1741         hardsendqmax = src->hardsendqmax;
1742         recvqmax = src->recvqmax;
1743         penaltythreshold = src->penaltythreshold;
1744         commandrate = src->commandrate;
1745         maxlocal = src->maxlocal;
1746         maxglobal = src->maxglobal;
1747         maxconnwarn = src->maxconnwarn;
1748         maxchans = src->maxchans;
1749         limit = src->limit;
1750 }