src/users.cpp

   1 /*
   2  * InspIRCd -- Internet Relay Chat Daemon
   3  *
   4  *   Copyright (C) 2009-2010 Daniel De Graaf <danieldg@inspircd.org>
   5  *   Copyright (C) 2006-2009 Robin Burchell <robin+git@viroteck.net>
   6  *   Copyright (C) 2006-2007, 2009 Dennis Friis <peavey@inspircd.org>
   7  *   Copyright (C) 2008 John Brooks <john.brooks@dereferenced.net>
   8  *   Copyright (C) 2008 Thomas Stagner <aquanight@inspircd.org>
   9  *   Copyright (C) 2008 Oliver Lupton <oliverlupton@gmail.com>
  10  *   Copyright (C) 2003-2008 Craig Edwards <craigedwards@brainbox.cc>
  11  *
  12  * This file is part of InspIRCd.  InspIRCd is free software: you can
  13  * redistribute it and/or modify it under the terms of the GNU General Public
  14  * License as published by the Free Software Foundation, version 2.
  15  *
  16  * This program is distributed in the hope that it will be useful, but WITHOUT
  17  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  18  * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
  19  * details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  23  */
  24
  25
  26 #include "inspircd.h"
  27 #include <stdarg.h>
  28 #include "socketengine.h"
  29 #include "xline.h"
  30 #include "bancache.h"
  31 #include "commands/cmd_whowas.h"
  32
  33 already_sent_t LocalUser::already_sent_id = 0;
  34
  35 std::string User::ProcessNoticeMasks(const char *sm)
  36 {
  37         bool adding = true, oldadding = false;
  38         const char *c = sm;
  39         std::string output;
  40
  41         while (c && *c)
  42         {
  43                 switch (*c)
  44                 {
  45                         case '+':
  46                                 adding = true;
  47                         break;
  48                         case '-':
  49                                 adding = false;
  50                         break;
  51                         case '*':
  52                                 for (unsigned char d = 'a'; d <= 'z'; d++)
  53                                 {
  54                                         if (!ServerInstance->SNO->masks[d - 'a'].Description.empty())
  55                                         {
  56                                                 if ((!IsNoticeMaskSet(d) && adding) || (IsNoticeMaskSet(d) && !adding))
  57                                                 {
  58                                                         if ((oldadding != adding) || (!output.length()))
  59                                                                 output += (adding ? '+' : '-');
  60
  61                                                         this->SetNoticeMask(d, adding);
  62
  63                                                         output += d;
  64                                                 }
  65                                                 oldadding = adding;
  66                                                 char u = toupper(d);
  67                                                 if ((!IsNoticeMaskSet(u) && adding) || (IsNoticeMaskSet(u) && !adding))
  68                                                 {
  69                                                         if ((oldadding != adding) || (!output.length()))
  70                                                                 output += (adding ? '+' : '-');
  71
  72                                                         this->SetNoticeMask(u, adding);
  73
  74                                                         output += u;
  75                                                 }
  76                                                 oldadding = adding;
  77                                         }
  78                                 }
  79                         break;
  80                         default:
  81                                 if (isalpha(*c))
  82                                 {
  83                                         if ((!IsNoticeMaskSet(*c) && adding) || (IsNoticeMaskSet(*c) && !adding))
  84                                         {
  85                                                 if ((oldadding != adding) || (!output.length()))
  86                                                         output += (adding ? '+' : '-');
  87
  88                                                 this->SetNoticeMask(*c, adding);
  89
  90                                                 output += *c;
  91                                         }
  92                                 }
  93                                 else
  94                                         this->WriteNumeric(ERR_UNKNOWNSNOMASK, "%s %c :is unknown snomask char to me", this->nick.c_str(), *c);
  95
  96                                 oldadding = adding;
  97                         break;
  98                 }
  99
 100                 c++;
 101         }
 102
 103         std::string s = this->FormatNoticeMasks();
 104         if (s.length() == 0)
 105         {
 106                 this->modes[UM_SNOMASK] = false;
 107         }
 108
 109         return output;
 110 }
 111
 112 void LocalUser::StartDNSLookup()
 113 {
 114         try
 115         {
 116                 bool cached = false;
 117                 const char* sip = this->GetIPString();
 118                 UserResolver *res_reverse;
 119
 120                 QueryType resolvtype = this->client_sa.sa.sa_family == AF_INET6 ? DNS_QUERY_PTR6 : DNS_QUERY_PTR4;
 121                 res_reverse = new UserResolver(this, sip, resolvtype, cached);
 122
 123                 ServerInstance->AddResolver(res_reverse, cached);
 124         }
 125         catch (CoreException& e)
 126         {
 127                 ServerInstance->Logs->Log("USERS", DEBUG,"Error in resolver: %s",e.GetReason());
 128                 dns_done = true;
 129                 ServerInstance->stats->statsDnsBad++;
 130         }
 131 }
 132
 133 bool User::IsNoticeMaskSet(unsigned char sm)
 134 {
 135         if (!isalpha(sm))
 136                 return false;
 137         return (snomasks[sm-65]);
 138 }
 139
 140 void User::SetNoticeMask(unsigned char sm, bool value)
 141 {
 142         if (!isalpha(sm))
 143                 return;
 144         snomasks[sm-65] = value;
 145 }
 146
 147 const char* User::FormatNoticeMasks()
 148 {
 149         static char data[MAXBUF];
 150         int offset = 0;
 151
 152         for (int n = 0; n < 64; n++)
 153         {
 154                 if (snomasks[n])
 155                         data[offset++] = n+65;
 156         }
 157
 158         data[offset] = 0;
 159         return data;
 160 }
 161
 162 bool User::IsModeSet(unsigned char m)
 163 {
 164         if (!isalpha(m))
 165                 return false;
 166         return (modes[m-65]);
 167 }
 168
 169 void User::SetMode(unsigned char m, bool value)
 170 {
 171         if (!isalpha(m))
 172                 return;
 173         modes[m-65] = value;
 174 }
 175
 176 const char* User::FormatModes(bool showparameters)
 177 {
 178         static char data[MAXBUF];
 179         std::string params;
 180         int offset = 0;
 181
 182         for (unsigned char n = 0; n < 64; n++)
 183         {
 184                 if (modes[n])
 185                 {
 186                         data[offset++] = n + 65;
 187                         ModeHandler* mh = ServerInstance->Modes->FindMode(n + 65, MODETYPE_USER);
 188                         if (showparameters && mh && mh->GetNumParams(true))
 189                         {
 190                                 std::string p = mh->GetUserParameter(this);
 191                                 if (p.length())
 192                                         params.append(" ").append(p);
 193                         }
 194                 }
 195         }
 196         data[offset] = 0;
 197         strlcat(data, params.c_str(), MAXBUF);
 198         return data;
 199 }
 200
 201 User::User(const std::string &uid, const std::string& sid, int type)
 202         : uuid(uid), server(sid), usertype(type)
 203 {
 204         age = ServerInstance->Time();
 205         signon = idle_lastmsg = 0;
 206         registered = 0;
 207         quietquit = quitting = exempt = dns_done = false;
 208         quitting_sendq = false;
 209         client_sa.sa.sa_family = AF_UNSPEC;
 210
 211         ServerInstance->Logs->Log("USERS", DEBUG, "New UUID for user: %s", uuid.c_str());
 212
 213         user_hash::iterator finduuid = ServerInstance->Users->uuidlist->find(uuid);
 214         if (finduuid == ServerInstance->Users->uuidlist->end())
 215                 (*ServerInstance->Users->uuidlist)[uuid] = this;
 216         else
 217                 throw CoreException("Duplicate UUID "+std::string(uuid)+" in User constructor");
 218 }
 219
 220 LocalUser::LocalUser(int myfd, irc::sockets::sockaddrs* client, irc::sockets::sockaddrs* servaddr)
 221         : User(ServerInstance->GetUID(), ServerInstance->Config->ServerName, USERTYPE_LOCAL), eh(this),
 222         localuseriter(ServerInstance->Users->local_users.end()),
 223         bytes_in(0), bytes_out(0), cmds_in(0), cmds_out(0), nping(0), CommandFloodPenalty(0),
 224         already_sent(0)
 225 {
 226         ident = "unknown";
 227         lastping = 0;
 228         eh.SetFd(myfd);
 229         memcpy(&client_sa, client, sizeof(irc::sockets::sockaddrs));
 230         memcpy(&server_sa, servaddr, sizeof(irc::sockets::sockaddrs));
 231         dhost = host = GetIPString();
 232 }
 233
 234 User::~User()
 235 {
 236         if (ServerInstance->Users->uuidlist->find(uuid) != ServerInstance->Users->uuidlist->end())
 237                 ServerInstance->Logs->Log("USERS", DEFAULT, "User destructor for %s called without cull", uuid.c_str());
 238 }
 239
 240 const std::string& User::MakeHost()
 241 {
 242         if (!this->cached_makehost.empty())
 243                 return this->cached_makehost;
 244
 245         char nhost[MAXBUF];
 246         /* This is much faster than snprintf */
 247         char* t = nhost;
 248         for(const char* n = ident.c_str(); *n; n++)
 249                 *t++ = *n;
 250         *t++ = '@';
 251         for(const char* n = host.c_str(); *n; n++)
 252                 *t++ = *n;
 253         *t = 0;
 254
 255         this->cached_makehost.assign(nhost);
 256
 257         return this->cached_makehost;
 258 }
 259
 260 const std::string& User::MakeHostIP()
 261 {
 262         if (!this->cached_hostip.empty())
 263                 return this->cached_hostip;
 264
 265         char ihost[MAXBUF];
 266         /* This is much faster than snprintf */
 267         char* t = ihost;
 268         for(const char* n = ident.c_str(); *n; n++)
 269                 *t++ = *n;
 270         *t++ = '@';
 271         for(const char* n = this->GetIPString(); *n; n++)
 272                 *t++ = *n;
 273         *t = 0;
 274
 275         this->cached_hostip = ihost;
 276
 277         return this->cached_hostip;
 278 }
 279
 280 const std::string& User::GetFullHost()
 281 {
 282         if (!this->cached_fullhost.empty())
 283                 return this->cached_fullhost;
 284
 285         char result[MAXBUF];
 286         char* t = result;
 287         for(const char* n = nick.c_str(); *n; n++)
 288                 *t++ = *n;
 289         *t++ = '!';
 290         for(const char* n = ident.c_str(); *n; n++)
 291                 *t++ = *n;
 292         *t++ = '@';
 293         for(const char* n = dhost.c_str(); *n; n++)
 294                 *t++ = *n;
 295         *t = 0;
 296
 297         this->cached_fullhost = result;
 298
 299         return this->cached_fullhost;
 300 }
 301
 302 char* User::MakeWildHost()
 303 {
 304         static char nresult[MAXBUF];
 305         char* t = nresult;
 306         *t++ = '*';     *t++ = '!';
 307         *t++ = '*';     *t++ = '@';
 308         for(const char* n = dhost.c_str(); *n; n++)
 309                 *t++ = *n;
 310         *t = 0;
 311         return nresult;
 312 }
 313
 314 const std::string& User::GetFullRealHost()
 315 {
 316         if (!this->cached_fullrealhost.empty())
 317                 return this->cached_fullrealhost;
 318
 319         char fresult[MAXBUF];
 320         char* t = fresult;
 321         for(const char* n = nick.c_str(); *n; n++)
 322                 *t++ = *n;
 323         *t++ = '!';
 324         for(const char* n = ident.c_str(); *n; n++)
 325                 *t++ = *n;
 326         *t++ = '@';
 327         for(const char* n = host.c_str(); *n; n++)
 328                 *t++ = *n;
 329         *t = 0;
 330
 331         this->cached_fullrealhost = fresult;
 332
 333         return this->cached_fullrealhost;
 334 }
 335
 336 bool LocalUser::IsInvited(const irc::string &channel)
 337 {
 338         Channel* chan = ServerInstance->FindChan(channel.c_str());
 339         if (!chan)
 340                 return false;
 341
 342         return (Invitation::Find(chan, this) != NULL);
 343 }
 344
 345 InviteList& LocalUser::GetInviteList()
 346 {
 347         RemoveExpiredInvites();
 348         return invites;
 349 }
 350
 351 void LocalUser::InviteTo(const irc::string &channel, time_t invtimeout)
 352 {
 353         Channel* chan = ServerInstance->FindChan(channel.c_str());
 354         if (chan)
 355                 Invitation::Create(chan, this, invtimeout);
 356 }
 357
 358 void LocalUser::RemoveInvite(const irc::string &channel)
 359 {
 360         Channel* chan = ServerInstance->FindChan(channel.c_str());
 361         if (chan)
 362         {
 363                 Invitation* inv = Invitation::Find(chan, this);
 364                 if (inv)
 365                 {
 366                         inv->cull();
 367                         delete inv;
 368                 }
 369         }
 370 }
 371
 372 void LocalUser::RemoveExpiredInvites()
 373 {
 374         Invitation::Find(NULL, this);
 375 }
 376
 377 bool User::HasModePermission(unsigned char, ModeType)
 378 {
 379         return true;
 380 }
 381
 382 bool LocalUser::HasModePermission(unsigned char mode, ModeType type)
 383 {
 384         if (!IS_OPER(this))
 385                 return false;
 386
 387         if (mode < 'A' || mode > ('A' + 64)) return false;
 388
 389         return ((type == MODETYPE_USER ? oper->AllowedUserModes : oper->AllowedChanModes))[(mode - 'A')];
 390
 391 }
 392 /*
 393  * users on remote servers can completely bypass all permissions based checks.
 394  * This prevents desyncs when one server has different type/class tags to another.
 395  * That having been said, this does open things up to the possibility of source changes
 396  * allowing remote kills, etc - but if they have access to the src, they most likely have
 397  * access to the conf - so it's an end to a means either way.
 398  */
 399 bool User::HasPermission(const std::string&)
 400 {
 401         return true;
 402 }
 403
 404 bool LocalUser::HasPermission(const std::string &command)
 405 {
 406         // are they even an oper at all?
 407         if (!IS_OPER(this))
 408         {
 409                 return false;
 410         }
 411
 412         if (oper->AllowedOperCommands.find(command) != oper->AllowedOperCommands.end())
 413                 return true;
 414         else if (oper->AllowedOperCommands.find("*") != oper->AllowedOperCommands.end())
 415                 return true;
 416
 417         return false;
 418 }
 419
 420 bool User::HasPrivPermission(const std::string &privstr, bool noisy)
 421 {
 422         return true;
 423 }
 424
 425 bool LocalUser::HasPrivPermission(const std::string &privstr, bool noisy)
 426 {
 427         if (!IS_OPER(this))
 428         {
 429                 if (noisy)
 430                         this->WriteServ("NOTICE %s :You are not an oper", this->nick.c_str());
 431                 return false;
 432         }
 433
 434         if (oper->AllowedPrivs.find(privstr) != oper->AllowedPrivs.end())
 435         {
 436                 return true;
 437         }
 438         else if (oper->AllowedPrivs.find("*") != oper->AllowedPrivs.end())
 439         {
 440                 return true;
 441         }
 442
 443         if (noisy)
 444                 this->WriteServ("NOTICE %s :Oper type %s does not have access to priv %s", this->nick.c_str(), oper->NameStr(), privstr.c_str());
 445         return false;
 446 }
 447
 448 void UserIOHandler::OnDataReady()
 449 {
 450         if (user->quitting)
 451                 return;
 452
 453         if (recvq.length() > user->MyClass->GetRecvqMax() && !user->HasPrivPermission("users/flood/increased-buffers"))
 454         {
 455                 ServerInstance->Users->QuitUser(user, "RecvQ exceeded");
 456                 ServerInstance->SNO->WriteToSnoMask('a', "User %s RecvQ of %lu exceeds connect class maximum of %lu",
 457                         user->nick.c_str(), (unsigned long)recvq.length(), user->MyClass->GetRecvqMax());
 458                 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                 ServerInstance->Users->local_users.erase(localuseriter);
 549         else
 550                 ServerInstance->Logs->Log("USERS", DEFAULT, "ERROR: LocalUserIter does not point to a valid entry for " + this->nick);
 551
 552         ClearInvites();
 553         eh.cull();
 554         return User::cull();
 555 }
 556
 557 CullResult FakeUser::cull()
 558 {
 559         // Fake users don't quit, they just get culled.
 560         quitting = true;
 561         ServerInstance->Users->clientlist->erase(nick);
 562         ServerInstance->Users->uuidlist->erase(uuid);
 563         return User::cull();
 564 }
 565
 566 void User::Oper(OperInfo* info)
 567 {
 568         if (this->IsModeSet('o'))
 569                 this->UnOper();
 570
 571         this->modes[UM_OPERATOR] = 1;
 572         this->oper = info;
 573         this->WriteServ("MODE %s :+o", this->nick.c_str());
 574         FOREACH_MOD(I_OnOper, OnOper(this, info->name));
 575
 576         std::string opername;
 577         if (info->oper_block)
 578                 opername = info->oper_block->getString("name");
 579
 580         if (IS_LOCAL(this))
 581         {
 582                 LocalUser* l = IS_LOCAL(this);
 583                 std::string vhost = oper->getConfig("vhost");
 584                 if (!vhost.empty())
 585                         l->ChangeDisplayedHost(vhost.c_str());
 586                 std::string opClass = oper->getConfig("class");
 587                 if (!opClass.empty())
 588                         l->SetClass(opClass);
 589         }
 590
 591         ServerInstance->SNO->WriteToSnoMask('o',"%s (%s@%s) is now an IRC operator of type %s (using oper '%s')",
 592                 nick.c_str(), ident.c_str(), host.c_str(), oper->NameStr(), opername.c_str());
 593         this->WriteNumeric(381, "%s :You are now %s %s", nick.c_str(), strchr("aeiouAEIOU", oper->name[0]) ? "an" : "a", oper->NameStr());
 594
 595         ServerInstance->Logs->Log("OPER", DEFAULT, "%s opered as type: %s", GetFullRealHost().c_str(), oper->NameStr());
 596         ServerInstance->Users->all_opers.push_back(this);
 597
 598         // Expand permissions from config for faster lookup
 599         if (IS_LOCAL(this))
 600                 oper->init();
 601
 602         FOREACH_MOD(I_OnPostOper,OnPostOper(this, oper->name, opername));
 603 }
 604
 605 void OperInfo::init()
 606 {
 607         AllowedOperCommands.clear();
 608         AllowedPrivs.clear();
 609         AllowedUserModes.reset();
 610         AllowedChanModes.reset();
 611         AllowedUserModes['o' - 'A'] = true; // Call me paranoid if you want.
 612
 613         for(std::vector<reference<ConfigTag> >::iterator iter = class_blocks.begin(); iter != class_blocks.end(); ++iter)
 614         {
 615                 ConfigTag* tag = *iter;
 616                 std::string mycmd, mypriv;
 617                 /* Process commands */
 618                 irc::spacesepstream CommandList(tag->getString("commands"));
 619                 while (CommandList.GetToken(mycmd))
 620                 {
 621                         AllowedOperCommands.insert(mycmd);
 622                 }
 623
 624                 irc::spacesepstream PrivList(tag->getString("privs"));
 625                 while (PrivList.GetToken(mypriv))
 626                 {
 627                         AllowedPrivs.insert(mypriv);
 628                 }
 629
 630                 std::string modes = tag->getString("usermodes");
 631                 for (std::string::const_iterator c = modes.begin(); c != modes.end(); ++c)
 632                 {
 633                         if (*c == '*')
 634                         {
 635                                 this->AllowedUserModes.set();
 636                         }
 637                         else if (*c >= 'A' && *c < 'z')
 638                         {
 639                                 this->AllowedUserModes[*c - 'A'] = true;
 640                         }
 641                 }
 642
 643                 modes = tag->getString("chanmodes");
 644                 for (std::string::const_iterator c = modes.begin(); c != modes.end(); ++c)
 645                 {
 646                         if (*c == '*')
 647                         {
 648                                 this->AllowedChanModes.set();
 649                         }
 650                         else if (*c >= 'A' && *c < 'z')
 651                         {
 652                                 this->AllowedChanModes[*c - 'A'] = true;
 653                         }
 654                 }
 655         }
 656 }
 657
 658 void User::UnOper()
 659 {
 660         if (!IS_OPER(this))
 661                 return;
 662
 663         /*
 664          * unset their oper type (what IS_OPER checks).
 665          * note, order is important - this must come before modes as -o attempts
 666          * to call UnOper. -- w00t
 667          */
 668         oper = NULL;
 669
 670
 671         /* Remove all oper only modes from the user when the deoper - Bug #466*/
 672         std::string moderemove("-");
 673
 674         for (unsigned char letter = 'A'; letter <= 'z'; letter++)
 675         {
 676                 ModeHandler* mh = ServerInstance->Modes->FindMode(letter, MODETYPE_USER);
 677                 if (mh && mh->NeedsOper())
 678                         moderemove += letter;
 679         }
 680
 681
 682         std::vector<std::string> parameters;
 683         parameters.push_back(this->nick);
 684         parameters.push_back(moderemove);
 685
 686         ServerInstance->Parser->CallHandler("MODE", parameters, this);
 687
 688         /* remove the user from the oper list. Will remove multiple entries as a safeguard against bug #404 */
 689         ServerInstance->Users->all_opers.remove(this);
 690
 691         this->modes[UM_OPERATOR] = 0;
 692 }
 693
 694 /* adds or updates an entry in the whowas list */
 695 void User::AddToWhoWas()
 696 {
 697         Module* whowas = ServerInstance->Modules->Find("cmd_whowas.so");
 698         if (whowas)
 699         {
 700                 WhowasRequest req(NULL, whowas, WhowasRequest::WHOWAS_ADD);
 701                 req.user = this;
 702                 req.Send();
 703         }
 704 }
 705
 706 /*
 707  * Check class restrictions
 708  */
 709 void LocalUser::CheckClass()
 710 {
 711         ConnectClass* a = this->MyClass;
 712
 713         if (!a)
 714         {
 715                 ServerInstance->Users->QuitUser(this, "Access denied by configuration");
 716                 return;
 717         }
 718         else if (a->type == CC_DENY)
 719         {
 720                 ServerInstance->Users->QuitUser(this, a->config->getString("reason", "Unauthorised connection"));
 721                 return;
 722         }
 723         else if ((a->GetMaxLocal()) && (ServerInstance->Users->LocalCloneCount(this) > a->GetMaxLocal()))
 724         {
 725                 ServerInstance->Users->QuitUser(this, "No more connections allowed from your host via this connect class (local)");
 726                 if (a->maxconnwarn)
 727                         ServerInstance->SNO->WriteToSnoMask('a', "WARNING: maximum LOCAL connections (%ld) exceeded for IP %s", a->GetMaxLocal(), this->GetIPString());
 728                 return;
 729         }
 730         else if ((a->GetMaxGlobal()) && (ServerInstance->Users->GlobalCloneCount(this) > a->GetMaxGlobal()))
 731         {
 732                 ServerInstance->Users->QuitUser(this, "No more connections allowed from your host via this connect class (global)");
 733                 if (a->maxconnwarn)
 734                         ServerInstance->SNO->WriteToSnoMask('a', "WARNING: maximum GLOBAL connections (%ld) exceeded for IP %s", a->GetMaxGlobal(), this->GetIPString());
 735                 return;
 736         }
 737
 738         this->nping = ServerInstance->Time() + a->GetPingTime() + ServerInstance->Config->dns_timeout;
 739 }
 740
 741 bool User::CheckLines(bool doZline)
 742 {
 743         const char* check[] = { "G" , "K", (doZline) ? "Z" : NULL, NULL };
 744
 745         if (!this->exempt)
 746         {
 747                 for (int n = 0; check[n]; ++n)
 748                 {
 749                         XLine *r = ServerInstance->XLines->MatchesLine(check[n], this);
 750
 751                         if (r)
 752                         {
 753                                 r->Apply(this);
 754                                 return true;
 755                         }
 756                 }
 757         }
 758
 759         return false;
 760 }
 761
 762 void LocalUser::FullConnect()
 763 {
 764         ServerInstance->stats->statsConnects++;
 765         this->idle_lastmsg = ServerInstance->Time();
 766
 767         /*
 768          * You may be thinking "wtf, we checked this in User::AddClient!" - and yes, we did, BUT.
 769          * At the time AddClient is called, we don't have a resolved host, by here we probably do - which
 770          * may put the user into a totally seperate class with different restrictions! so we *must* check again.
 771          * Don't remove this! -- w00t
 772          */
 773         MyClass = NULL;
 774         SetClass();
 775         CheckClass();
 776         CheckLines();
 777
 778         if (quitting)
 779                 return;
 780
 781         if (ServerInstance->Config->WelcomeNotice)
 782                 this->WriteServ("NOTICE Auth :Welcome to \002%s\002!",ServerInstance->Config->Network.c_str());
 783         this->WriteNumeric(RPL_WELCOME, "%s :Welcome to the %s IRC Network %s",this->nick.c_str(), ServerInstance->Config->Network.c_str(), GetFullRealHost().c_str());
 784         this->WriteNumeric(RPL_YOURHOSTIS, "%s :Your host is %s, running version %s",this->nick.c_str(),ServerInstance->Config->ServerName.c_str(),BRANCH);
 785         this->WriteNumeric(RPL_SERVERCREATED, "%s :This server was created %s %s", this->nick.c_str(), __TIME__, __DATE__);
 786
 787         std::string umlist = ServerInstance->Modes->UserModeList();
 788         std::string cmlist = ServerInstance->Modes->ChannelModeList();
 789         std::string pmlist = ServerInstance->Modes->ParaModeList();
 790         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());
 791
 792         ServerInstance->Config->Send005(this);
 793         this->WriteNumeric(RPL_YOURUUID, "%s %s :your unique ID", this->nick.c_str(), this->uuid.c_str());
 794
 795         /* Now registered */
 796         if (ServerInstance->Users->unregistered_count)
 797                 ServerInstance->Users->unregistered_count--;
 798
 799         /* Trigger MOTD and LUSERS output, give modules a chance too */
 800         ModResult MOD_RESULT;
 801         std::string command("MOTD");
 802         std::vector<std::string> parameters;
 803         FIRST_MOD_RESULT(OnPreCommand, MOD_RESULT, (command, parameters, this, true, command));
 804         if (!MOD_RESULT)
 805                 ServerInstance->Parser->CallHandler(command, parameters, this);
 806
 807         MOD_RESULT = MOD_RES_PASSTHRU;
 808         command = "LUSERS";
 809         FIRST_MOD_RESULT(OnPreCommand, MOD_RESULT, (command, parameters, this, true, command));
 810         if (!MOD_RESULT)
 811                 ServerInstance->Parser->CallHandler(command, parameters, this);
 812
 813         if (ServerInstance->Config->RawLog)
 814                 WriteServ("PRIVMSG %s :*** Raw I/O logging is enabled on this server. All messages, passwords, and commands are being recorded.", nick.c_str());
 815
 816         /*
 817          * We don't set REG_ALL until triggering OnUserConnect, so some module events don't spew out stuff
 818          * for a user that doesn't exist yet.
 819          */
 820         FOREACH_MOD(I_OnUserConnect,OnUserConnect(this));
 821
 822         this->registered = REG_ALL;
 823
 824         FOREACH_MOD(I_OnPostConnect,OnPostConnect(this));
 825
 826         ServerInstance->SNO->WriteToSnoMask('c',"Client connecting on port %d (class %s): %s (%s) [%s]",
 827                 this->GetServerPort(), this->MyClass->name.c_str(), GetFullRealHost().c_str(), this->GetIPString(), this->fullname.c_str());
 828         ServerInstance->Logs->Log("BANCACHE", DEBUG, "BanCache: Adding NEGATIVE hit for %s", this->GetIPString());
 829         ServerInstance->BanCache->AddHit(this->GetIPString(), "", "");
 830         // reset the flood penalty (which could have been raised due to things like auto +x)
 831         CommandFloodPenalty = 0;
 832 }
 833
 834 void User::InvalidateCache()
 835 {
 836         /* Invalidate cache */
 837         cached_fullhost.clear();
 838         cached_hostip.clear();
 839         cached_makehost.clear();
 840         cached_fullrealhost.clear();
 841 }
 842
 843 bool User::ChangeNick(const std::string& newnick, bool force)
 844 {
 845         if (quitting)
 846         {
 847                 ServerInstance->Logs->Log("USERS", DEFAULT, "ERROR: Attempted to change nick of a quitting user: " + this->nick);
 848                 return false;
 849         }
 850
 851         ModResult MOD_RESULT;
 852
 853         if (force)
 854                 ServerInstance->NICKForced.set(this, 1);
 855         FIRST_MOD_RESULT(OnUserPreNick, MOD_RESULT, (this, newnick));
 856         ServerInstance->NICKForced.set(this, 0);
 857
 858         if (MOD_RESULT == MOD_RES_DENY)
 859         {
 860                 ServerInstance->stats->statsCollisions++;
 861                 return false;
 862         }
 863
 864         if (assign(newnick) == assign(nick))
 865         {
 866                 // case change, don't need to check Q:lines and such
 867                 // and, if it's identical including case, we can leave right now
 868                 if (newnick == nick)
 869                         return true;
 870         }
 871         else
 872         {
 873                 /*
 874                  * Don't check Q:Lines if it's a server-enforced change, just on the off-chance some fucking *moron*
 875                  * tries to Q:Line SIDs, also, this means we just get our way period, as it really should be.
 876                  * Thanks Kein for finding this. -- w00t
 877                  *
 878                  * Also don't check Q:Lines for remote nickchanges, they should have our Q:Lines anyway to enforce themselves.
 879                  *              -- w00t
 880                  */
 881                 if (IS_LOCAL(this) && !force)
 882                 {
 883                         XLine* mq = ServerInstance->XLines->MatchesLine("Q",newnick);
 884                         if (mq)
 885                         {
 886                                 if (this->registered == REG_ALL)
 887                                 {
 888                                         ServerInstance->SNO->WriteGlobalSno('a', "Q-Lined nickname %s from %s: %s",
 889                                                 newnick.c_str(), GetFullRealHost().c_str(), mq->reason.c_str());
 890                                 }
 891                                 this->WriteNumeric(432, "%s %s :Invalid nickname: %s",this->nick.c_str(), newnick.c_str(), mq->reason.c_str());
 892                                 return false;
 893                         }
 894
 895                         if (ServerInstance->Config->RestrictBannedUsers)
 896                         {
 897                                 for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
 898                                 {
 899                                         Channel *chan = *i;
 900                                         if (chan->GetPrefixValue(this) < VOICE_VALUE && chan->IsBanned(this))
 901                                         {
 902                                                 this->WriteNumeric(404, "%s %s :Cannot send to channel (you're banned)", this->nick.c_str(), chan->name.c_str());
 903                                                 return false;
 904                                         }
 905                                 }
 906                         }
 907                 }
 908
 909                 /*
 910                  * Uh oh.. if the nickname is in use, and it's not in use by the person using it (doh) --
 911                  * then we have a potential collide. Check whether someone else is camping on the nick
 912                  * (i.e. connect -> send NICK, don't send USER.) If they are camping, force-change the
 913                  * camper to their UID, and allow the incoming nick change.
 914                  *
 915                  * If the guy using the nick is already using it, tell the incoming nick change to gtfo,
 916                  * because the nick is already (rightfully) in use. -- w00t
 917                  */
 918                 User* InUse = ServerInstance->FindNickOnly(newnick);
 919                 if (InUse && (InUse != this))
 920                 {
 921                         if (InUse->registered != REG_ALL)
 922                         {
 923                                 /* force the camper to their UUID, and ask them to re-send a NICK. */
 924                                 InUse->WriteTo(InUse, "NICK %s", InUse->uuid.c_str());
 925                                 InUse->WriteNumeric(433, "%s %s :Nickname overruled.", InUse->nick.c_str(), InUse->nick.c_str());
 926
 927                                 ServerInstance->Users->clientlist->erase(InUse->nick);
 928                                 (*(ServerInstance->Users->clientlist))[InUse->uuid] = InUse;
 929
 930                                 InUse->nick = InUse->uuid;
 931                                 InUse->InvalidateCache();
 932                                 InUse->registered &= ~REG_NICK;
 933                         }
 934                         else
 935                         {
 936                                 /* No camping, tell the incoming user  to stop trying to change nick ;p */
 937                                 this->WriteNumeric(433, "%s %s :Nickname is already in use.", this->registered >= REG_NICK ? this->nick.c_str() : "*", newnick.c_str());
 938                                 return false;
 939                         }
 940                 }
 941         }
 942
 943         if (this->registered == REG_ALL)
 944                 this->WriteCommon("NICK %s",newnick.c_str());
 945         std::string oldnick = nick;
 946         nick = newnick;
 947
 948         InvalidateCache();
 949         ServerInstance->Users->clientlist->erase(oldnick);
 950         (*(ServerInstance->Users->clientlist))[newnick] = this;
 951
 952         if (registered == REG_ALL)
 953                 FOREACH_MOD(I_OnUserPostNick,OnUserPostNick(this,oldnick));
 954
 955         return true;
 956 }
 957
 958 int LocalUser::GetServerPort()
 959 {
 960         switch (this->server_sa.sa.sa_family)
 961         {
 962                 case AF_INET6:
 963                         return htons(this->server_sa.in6.sin6_port);
 964                 case AF_INET:
 965                         return htons(this->server_sa.in4.sin_port);
 966         }
 967         return 0;
 968 }
 969
 970 const char* User::GetIPString()
 971 {
 972         int port;
 973         if (cachedip.empty())
 974         {
 975                 irc::sockets::satoap(client_sa, cachedip, port);
 976                 /* IP addresses starting with a : on irc are a Bad Thing (tm) */
 977                 if (cachedip.c_str()[0] == ':')
 978                         cachedip.insert(0,1,'0');
 979         }
 980
 981         return cachedip.c_str();
 982 }
 983
 984 irc::sockets::cidr_mask User::GetCIDRMask()
 985 {
 986         int range = 0;
 987         switch (client_sa.sa.sa_family)
 988         {
 989                 case AF_INET6:
 990                         range = ServerInstance->Config->c_ipv6_range;
 991                         break;
 992                 case AF_INET:
 993                         range = ServerInstance->Config->c_ipv4_range;
 994                         break;
 995         }
 996         return irc::sockets::cidr_mask(client_sa, range);
 997 }
 998
 999 bool User::SetClientIP(const char* sip, bool recheck_eline)
1000 {
1001         cachedip.clear();
1002         cached_hostip.clear();
1003         return irc::sockets::aptosa(sip, 0, client_sa);
1004 }
1005
1006 void User::SetClientIP(const irc::sockets::sockaddrs& sa, bool recheck_eline)
1007 {
1008         cachedip.clear();
1009         cached_hostip.clear();
1010         memcpy(&client_sa, &sa, sizeof(irc::sockets::sockaddrs));
1011 }
1012
1013 bool LocalUser::SetClientIP(const char* sip, bool recheck_eline)
1014 {
1015         irc::sockets::sockaddrs sa;
1016         if (!irc::sockets::aptosa(sip, 0, sa))
1017                 // Invalid
1018                 return false;
1019
1020         LocalUser::SetClientIP(sa, recheck_eline);
1021         return true;
1022 }
1023
1024 void LocalUser::SetClientIP(const irc::sockets::sockaddrs& sa, bool recheck_eline)
1025 {
1026         if (sa != client_sa)
1027         {
1028                 User::SetClientIP(sa);
1029                 if (recheck_eline)
1030                         this->exempt = (ServerInstance->XLines->MatchesLine("E", this) != NULL);
1031
1032                 FOREACH_MOD(I_OnSetUserIP,OnSetUserIP(this));
1033         }
1034 }
1035
1036 static std::string wide_newline("\r\n");
1037
1038 void User::Write(const std::string& text)
1039 {
1040 }
1041
1042 void User::Write(const char *text, ...)
1043 {
1044 }
1045
1046 void LocalUser::Write(const std::string& text)
1047 {
1048         if (!ServerInstance->SE->BoundsCheckFd(&eh))
1049                 return;
1050
1051         if (text.length() > MAXBUF - 2)
1052         {
1053                 // this should happen rarely or never. Crop the string at 512 and try again.
1054                 std::string try_again = text.substr(0, MAXBUF - 2);
1055                 Write(try_again);
1056                 return;
1057         }
1058
1059         ServerInstance->Logs->Log("USEROUTPUT", RAWIO, "C[%s] O %s", uuid.c_str(), text.c_str());
1060
1061         eh.AddWriteBuf(text);
1062         eh.AddWriteBuf(wide_newline);
1063
1064         ServerInstance->stats->statsSent += text.length() + 2;
1065         this->bytes_out += text.length() + 2;
1066         this->cmds_out++;
1067 }
1068
1069 /** Write()
1070  */
1071 void LocalUser::Write(const char *text, ...)
1072 {
1073         va_list argsPtr;
1074         char textbuffer[MAXBUF];
1075
1076         va_start(argsPtr, text);
1077         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1078         va_end(argsPtr);
1079
1080         this->Write(std::string(textbuffer));
1081 }
1082
1083 void User::WriteServ(const std::string& text)
1084 {
1085         this->Write(":%s %s",ServerInstance->Config->ServerName.c_str(),text.c_str());
1086 }
1087
1088 /** WriteServ()
1089  *  Same as Write(), except `text' is prefixed with `:server.name '.
1090  */
1091 void User::WriteServ(const char* text, ...)
1092 {
1093         va_list argsPtr;
1094         char textbuffer[MAXBUF];
1095
1096         va_start(argsPtr, text);
1097         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1098         va_end(argsPtr);
1099
1100         this->WriteServ(std::string(textbuffer));
1101 }
1102
1103
1104 void User::WriteNumeric(unsigned int numeric, const char* text, ...)
1105 {
1106         va_list argsPtr;
1107         char textbuffer[MAXBUF];
1108
1109         va_start(argsPtr, text);
1110         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1111         va_end(argsPtr);
1112
1113         this->WriteNumeric(numeric, std::string(textbuffer));
1114 }
1115
1116 void User::WriteNumeric(unsigned int numeric, const std::string &text)
1117 {
1118         char textbuffer[MAXBUF];
1119         ModResult MOD_RESULT;
1120
1121         FIRST_MOD_RESULT(OnNumeric, MOD_RESULT, (this, numeric, text));
1122
1123         if (MOD_RESULT == MOD_RES_DENY)
1124                 return;
1125
1126         snprintf(textbuffer,MAXBUF,":%s %03u %s",ServerInstance->Config->ServerName.c_str(), numeric, text.c_str());
1127         this->Write(std::string(textbuffer));
1128 }
1129
1130 void User::WriteFrom(User *user, const std::string &text)
1131 {
1132         char tb[MAXBUF];
1133
1134         snprintf(tb,MAXBUF,":%s %s",user->GetFullHost().c_str(),text.c_str());
1135
1136         this->Write(std::string(tb));
1137 }
1138
1139
1140 /* write text from an originating user to originating user */
1141
1142 void User::WriteFrom(User *user, const char* text, ...)
1143 {
1144         va_list argsPtr;
1145         char textbuffer[MAXBUF];
1146
1147         va_start(argsPtr, text);
1148         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1149         va_end(argsPtr);
1150
1151         this->WriteFrom(user, std::string(textbuffer));
1152 }
1153
1154
1155 /* write text to an destination user from a source user (e.g. user privmsg) */
1156
1157 void User::WriteTo(User *dest, const char *data, ...)
1158 {
1159         char textbuffer[MAXBUF];
1160         va_list argsPtr;
1161
1162         va_start(argsPtr, data);
1163         vsnprintf(textbuffer, MAXBUF, data, argsPtr);
1164         va_end(argsPtr);
1165
1166         this->WriteTo(dest, std::string(textbuffer));
1167 }
1168
1169 void User::WriteTo(User *dest, const std::string &data)
1170 {
1171         dest->WriteFrom(this, data);
1172 }
1173
1174 void User::WriteCommon(const char* text, ...)
1175 {
1176         char textbuffer[MAXBUF];
1177         va_list argsPtr;
1178
1179         if (this->registered != REG_ALL || quitting)
1180                 return;
1181
1182         int len = snprintf(textbuffer,MAXBUF,":%s ",this->GetFullHost().c_str());
1183
1184         va_start(argsPtr, text);
1185         vsnprintf(textbuffer + len, MAXBUF - len, text, argsPtr);
1186         va_end(argsPtr);
1187
1188         this->WriteCommonRaw(std::string(textbuffer), true);
1189 }
1190
1191 void User::WriteCommonExcept(const char* text, ...)
1192 {
1193         char textbuffer[MAXBUF];
1194         va_list argsPtr;
1195
1196         if (this->registered != REG_ALL || quitting)
1197                 return;
1198
1199         int len = snprintf(textbuffer,MAXBUF,":%s ",this->GetFullHost().c_str());
1200
1201         va_start(argsPtr, text);
1202         vsnprintf(textbuffer + len, MAXBUF - len, text, argsPtr);
1203         va_end(argsPtr);
1204
1205         this->WriteCommonRaw(std::string(textbuffer), false);
1206 }
1207
1208 void User::WriteCommonRaw(const std::string &line, bool include_self)
1209 {
1210         if (this->registered != REG_ALL || quitting)
1211                 return;
1212
1213         LocalUser::already_sent_id++;
1214
1215         UserChanList include_c(chans);
1216         std::map<User*,bool> exceptions;
1217
1218         exceptions[this] = include_self;
1219
1220         FOREACH_MOD(I_OnBuildNeighborList,OnBuildNeighborList(this, include_c, exceptions));
1221
1222         for (std::map<User*,bool>::iterator i = exceptions.begin(); i != exceptions.end(); ++i)
1223         {
1224                 LocalUser* u = IS_LOCAL(i->first);
1225                 if (u && !u->quitting)
1226                 {
1227                         u->already_sent = LocalUser::already_sent_id;
1228                         if (i->second)
1229                                 u->Write(line);
1230                 }
1231         }
1232         for (UCListIter v = include_c.begin(); v != include_c.end(); ++v)
1233         {
1234                 Channel* c = *v;
1235                 const UserMembList* ulist = c->GetUsers();
1236                 for (UserMembList::const_iterator i = ulist->begin(); i != ulist->end(); i++)
1237                 {
1238                         LocalUser* u = IS_LOCAL(i->first);
1239                         if (u && !u->quitting && u->already_sent != LocalUser::already_sent_id)
1240                         {
1241                                 u->already_sent = LocalUser::already_sent_id;
1242                                 u->Write(line);
1243                         }
1244                 }
1245         }
1246 }
1247
1248 void User::WriteCommonQuit(const std::string &normal_text, const std::string &oper_text)
1249 {
1250         char tb1[MAXBUF];
1251         char tb2[MAXBUF];
1252
1253         if (this->registered != REG_ALL)
1254                 return;
1255
1256         already_sent_t uniq_id = ++LocalUser::already_sent_id;
1257
1258         snprintf(tb1,MAXBUF,":%s QUIT :%s",this->GetFullHost().c_str(),normal_text.c_str());
1259         snprintf(tb2,MAXBUF,":%s QUIT :%s",this->GetFullHost().c_str(),oper_text.c_str());
1260         std::string out1 = tb1;
1261         std::string out2 = tb2;
1262
1263         UserChanList include_c(chans);
1264         std::map<User*,bool> exceptions;
1265
1266         FOREACH_MOD(I_OnBuildNeighborList,OnBuildNeighborList(this, include_c, exceptions));
1267
1268         for (std::map<User*,bool>::iterator i = exceptions.begin(); i != exceptions.end(); ++i)
1269         {
1270                 LocalUser* u = IS_LOCAL(i->first);
1271                 if (u && !u->quitting)
1272                 {
1273                         u->already_sent = uniq_id;
1274                         if (i->second)
1275                                 u->Write(IS_OPER(u) ? out2 : out1);
1276                 }
1277         }
1278         for (UCListIter v = include_c.begin(); v != include_c.end(); ++v)
1279         {
1280                 const UserMembList* ulist = (*v)->GetUsers();
1281                 for (UserMembList::const_iterator i = ulist->begin(); i != ulist->end(); i++)
1282                 {
1283                         LocalUser* u = IS_LOCAL(i->first);
1284                         if (u && !u->quitting && (u->already_sent != uniq_id))
1285                         {
1286                                 u->already_sent = uniq_id;
1287                                 u->Write(IS_OPER(u) ? out2 : out1);
1288                         }
1289                 }
1290         }
1291 }
1292
1293 void LocalUser::SendText(const std::string& line)
1294 {
1295         Write(line);
1296 }
1297
1298 void RemoteUser::SendText(const std::string& line)
1299 {
1300         ServerInstance->PI->PushToClient(this, line);
1301 }
1302
1303 void FakeUser::SendText(const std::string& line)
1304 {
1305 }
1306
1307 void User::SendText(const char *text, ...)
1308 {
1309         va_list argsPtr;
1310         char line[MAXBUF];
1311
1312         va_start(argsPtr, text);
1313         vsnprintf(line, MAXBUF, text, argsPtr);
1314         va_end(argsPtr);
1315
1316         SendText(std::string(line));
1317 }
1318
1319 void User::SendText(const std::string &LinePrefix, std::stringstream &TextStream)
1320 {
1321         char line[MAXBUF];
1322         int start_pos = LinePrefix.length();
1323         int pos = start_pos;
1324         memcpy(line, LinePrefix.data(), pos);
1325         std::string Word;
1326         while (TextStream >> Word)
1327         {
1328                 int len = Word.length();
1329                 if (pos + len + 12 > MAXBUF)
1330                 {
1331                         line[pos] = '\0';
1332                         SendText(std::string(line));
1333                         pos = start_pos;
1334                 }
1335                 line[pos] = ' ';
1336                 memcpy(line + pos + 1, Word.data(), len);
1337                 pos += len + 1;
1338         }
1339         line[pos] = '\0';
1340         SendText(std::string(line));
1341 }
1342
1343 /* return 0 or 1 depending if users u and u2 share one or more common channels
1344  * (used by QUIT, NICK etc which arent channel specific notices)
1345  *
1346  * The old algorithm in 1.0 for this was relatively inefficient, iterating over
1347  * the first users channels then the second users channels within the outer loop,
1348  * therefore it was a maximum of x*y iterations (upon returning 0 and checking
1349  * all possible iterations). However this new function instead checks against the
1350  * channel's userlist in the inner loop which is a std::map<User*,User*>
1351  * and saves us time as we already know what pointer value we are after.
1352  * Don't quote me on the maths as i am not a mathematician or computer scientist,
1353  * but i believe this algorithm is now x+(log y) maximum iterations instead.
1354  */
1355 bool User::SharesChannelWith(User *other)
1356 {
1357         if ((!other) || (this->registered != REG_ALL) || (other->registered != REG_ALL))
1358                 return false;
1359
1360         /* Outer loop */
1361         for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1362         {
1363                 /* Eliminate the inner loop (which used to be ~equal in size to the outer loop)
1364                  * by replacing it with a map::find which *should* be more efficient
1365                  */
1366                 if ((*i)->HasUser(other))
1367                         return true;
1368         }
1369         return false;
1370 }
1371
1372 bool User::ChangeName(const char* gecos)
1373 {
1374         if (!this->fullname.compare(gecos))
1375                 return true;
1376
1377         if (IS_LOCAL(this))
1378         {
1379                 ModResult MOD_RESULT;
1380                 FIRST_MOD_RESULT(OnChangeLocalUserGECOS, MOD_RESULT, (IS_LOCAL(this),gecos));
1381                 if (MOD_RESULT == MOD_RES_DENY)
1382                         return false;
1383                 FOREACH_MOD(I_OnChangeName,OnChangeName(this,gecos));
1384         }
1385         this->fullname.assign(gecos, 0, ServerInstance->Config->Limits.MaxGecos);
1386
1387         return true;
1388 }
1389
1390 void User::DoHostCycle(const std::string &quitline)
1391 {
1392         char buffer[MAXBUF];
1393
1394         if (!ServerInstance->Config->CycleHosts)
1395                 return;
1396
1397         already_sent_t silent_id = ++LocalUser::already_sent_id;
1398         already_sent_t seen_id = ++LocalUser::already_sent_id;
1399
1400         UserChanList include_c(chans);
1401         std::map<User*,bool> exceptions;
1402
1403         FOREACH_MOD(I_OnBuildNeighborList,OnBuildNeighborList(this, include_c, exceptions));
1404
1405         for (std::map<User*,bool>::iterator i = exceptions.begin(); i != exceptions.end(); ++i)
1406         {
1407                 LocalUser* u = IS_LOCAL(i->first);
1408                 if (u && !u->quitting)
1409                 {
1410                         if (i->second)
1411                         {
1412                                 u->already_sent = seen_id;
1413                                 u->Write(quitline);
1414                         }
1415                         else
1416                         {
1417                                 u->already_sent = silent_id;
1418                         }
1419                 }
1420         }
1421         for (UCListIter v = include_c.begin(); v != include_c.end(); ++v)
1422         {
1423                 Channel* c = *v;
1424                 snprintf(buffer, MAXBUF, ":%s JOIN %s", GetFullHost().c_str(), c->name.c_str());
1425                 std::string joinline(buffer);
1426                 Membership* memb = c->GetUser(this);
1427                 std::string modeline = memb->modes;
1428                 if (modeline.length() > 0)
1429                 {
1430                         for(unsigned int i=0; i < memb->modes.length(); i++)
1431                                 modeline.append(" ").append(nick);
1432                         snprintf(buffer, MAXBUF, ":%s MODE %s +%s",
1433                                 ServerInstance->Config->CycleHostsFromUser ? GetFullHost().c_str() : ServerInstance->Config->ServerName.c_str(),
1434                                 c->name.c_str(), modeline.c_str());
1435                         modeline = buffer;
1436                 }
1437
1438                 const UserMembList *ulist = c->GetUsers();
1439                 for (UserMembList::const_iterator i = ulist->begin(); i != ulist->end(); i++)
1440                 {
1441                         LocalUser* u = IS_LOCAL(i->first);
1442                         if (u == NULL || u == this)
1443                                 continue;
1444                         if (u->already_sent == silent_id)
1445                                 continue;
1446
1447                         if (u->already_sent != seen_id)
1448                         {
1449                                 u->Write(quitline);
1450                                 u->already_sent = seen_id;
1451                         }
1452                         u->Write(joinline);
1453                         if (modeline.length() > 0)
1454                                 u->Write(modeline);
1455                 }
1456         }
1457 }
1458
1459 bool User::ChangeDisplayedHost(const char* shost)
1460 {
1461         if (dhost == shost)
1462                 return true;
1463
1464         if (IS_LOCAL(this))
1465         {
1466                 ModResult MOD_RESULT;
1467                 FIRST_MOD_RESULT(OnChangeLocalUserHost, MOD_RESULT, (IS_LOCAL(this),shost));
1468                 if (MOD_RESULT == MOD_RES_DENY)
1469                         return false;
1470         }
1471
1472         FOREACH_MOD(I_OnChangeHost, OnChangeHost(this,shost));
1473
1474         std::string quitstr = ":" + GetFullHost() + " QUIT :Changing host";
1475
1476         /* Fix by Om: User::dhost is 65 long, this was truncating some long hosts */
1477         this->dhost.assign(shost, 0, 64);
1478
1479         this->InvalidateCache();
1480
1481         this->DoHostCycle(quitstr);
1482
1483         if (IS_LOCAL(this))
1484                 this->WriteNumeric(RPL_YOURDISPLAYEDHOST, "%s %s :is now your displayed host",this->nick.c_str(),this->dhost.c_str());
1485
1486         return true;
1487 }
1488
1489 bool User::ChangeIdent(const char* newident)
1490 {
1491         if (this->ident == newident)
1492                 return true;
1493
1494         FOREACH_MOD(I_OnChangeIdent, OnChangeIdent(this,newident));
1495
1496         std::string quitstr = ":" + GetFullHost() + " QUIT :Changing ident";
1497
1498         this->ident.assign(newident, 0, ServerInstance->Config->Limits.IdentMax);
1499
1500         this->InvalidateCache();
1501
1502         this->DoHostCycle(quitstr);
1503
1504         return true;
1505 }
1506
1507 void User::SendAll(const char* command, const char* text, ...)
1508 {
1509         char textbuffer[MAXBUF];
1510         char formatbuffer[MAXBUF];
1511         va_list argsPtr;
1512
1513         va_start(argsPtr, text);
1514         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1515         va_end(argsPtr);
1516
1517         snprintf(formatbuffer,MAXBUF,":%s %s $* :%s", this->GetFullHost().c_str(), command, textbuffer);
1518         std::string fmt = formatbuffer;
1519
1520         for (LocalUserList::const_iterator i = ServerInstance->Users->local_users.begin(); i != ServerInstance->Users->local_users.end(); i++)
1521         {
1522                 if ((*i)->registered == REG_ALL)
1523                         (*i)->Write(fmt);
1524         }
1525 }
1526
1527
1528 std::string User::ChannelList(User* source, bool spy)
1529 {
1530         std::string list;
1531
1532         for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1533         {
1534                 Channel* c = *i;
1535                 /* If the target is the sender, neither +p nor +s is set, or
1536                  * the channel contains the user, it is not a spy channel
1537                  */
1538                 if (spy != (source == this || !(c->IsModeSet('p') || c->IsModeSet('s')) || c->HasUser(source)))
1539                         list.append(c->GetPrefixChar(this)).append(c->name).append(" ");
1540         }
1541
1542         return list;
1543 }
1544
1545 void User::SplitChanList(User* dest, const std::string &cl)
1546 {
1547         std::string line;
1548         std::ostringstream prefix;
1549         std::string::size_type start, pos, length;
1550
1551         prefix << this->nick << " " << dest->nick << " :";
1552         line = prefix.str();
1553         int namelen = ServerInstance->Config->ServerName.length() + 6;
1554
1555         for (start = 0; (pos = cl.find(' ', start)) != std::string::npos; start = pos+1)
1556         {
1557                 length = (pos == std::string::npos) ? cl.length() : pos;
1558
1559                 if (line.length() + namelen + length - start > 510)
1560                 {
1561                         ServerInstance->SendWhoisLine(this, dest, 319, "%s", line.c_str());
1562                         line = prefix.str();
1563                 }
1564
1565                 if(pos == std::string::npos)
1566                 {
1567                         line.append(cl.substr(start, length - start));
1568                         break;
1569                 }
1570                 else
1571                 {
1572                         line.append(cl.substr(start, length - start + 1));
1573                 }
1574         }
1575
1576         if (line.length() != prefix.str().length())
1577         {
1578                 ServerInstance->SendWhoisLine(this, dest, 319, "%s", line.c_str());
1579         }
1580 }
1581
1582 /*
1583  * Sets a user's connection class.
1584  * If the class name is provided, it will be used. Otherwise, the class will be guessed using host/ip/ident/etc.
1585  * NOTE: If the <ALLOW> or <DENY> tag specifies an ip, and this user resolves,
1586  * then their ip will be taken as 'priority' anyway, so for example,
1587  * <connect allow="127.0.0.1"> will match joe!bloggs@localhost
1588  */
1589 void LocalUser::SetClass(const std::string &explicit_name)
1590 {
1591         ConnectClass *found = NULL;
1592
1593         ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Setting connect class for UID %s", this->uuid.c_str());
1594
1595         if (!explicit_name.empty())
1596         {
1597                 for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++)
1598                 {
1599                         ConnectClass* c = *i;
1600
1601                         if (explicit_name == c->name)
1602                         {
1603                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Explicitly set to %s", explicit_name.c_str());
1604                                 found = c;
1605                         }
1606                 }
1607         }
1608         else
1609         {
1610                 for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++)
1611                 {
1612                         ConnectClass* c = *i;
1613                         ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Checking %s", c->GetName().c_str());
1614
1615                         ModResult MOD_RESULT;
1616                         FIRST_MOD_RESULT(OnSetConnectClass, MOD_RESULT, (this,c));
1617                         if (MOD_RESULT == MOD_RES_DENY)
1618                                 continue;
1619                         if (MOD_RESULT == MOD_RES_ALLOW)
1620                         {
1621                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Class forced by module to %s", c->GetName().c_str());
1622                                 found = c;
1623                                 break;
1624                         }
1625
1626                         if (c->type == CC_NAMED)
1627                                 continue;
1628
1629                         bool regdone = (registered != REG_NONE);
1630                         if (c->config->getBool("registered", regdone) != regdone)
1631                                 continue;
1632
1633                         /* check if host matches.. */
1634                         if (!InspIRCd::MatchCIDR(this->GetIPString(), c->GetHost(), NULL) &&
1635                             !InspIRCd::MatchCIDR(this->host, c->GetHost(), NULL))
1636                         {
1637                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "No host match (for %s)", c->GetHost().c_str());
1638                                 continue;
1639                         }
1640
1641                         /*
1642                          * deny change if change will take class over the limit check it HERE, not after we found a matching class,
1643                          * because we should attempt to find another class if this one doesn't match us. -- w00t
1644                          */
1645                         if (c->limit && (c->GetReferenceCount() >= c->limit))
1646                         {
1647                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "OOPS: Connect class limit (%lu) hit, denying", c->limit);
1648                                 continue;
1649                         }
1650
1651                         /* if it requires a port ... */
1652                         int port = c->config->getInt("port");
1653                         if (port)
1654                         {
1655                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Requires port (%d)", port);
1656
1657                                 /* and our port doesn't match, fail. */
1658                                 if (this->GetServerPort() != port)
1659                                         continue;
1660                         }
1661
1662                         if (regdone && !c->config->getString("password").empty())
1663                         {
1664                                 if (ServerInstance->PassCompare(this, c->config->getString("password"), password, c->config->getString("hash")))
1665                                 {
1666                                         ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Bad password, skipping");
1667                                         continue;
1668                                 }
1669                         }
1670
1671                         /* we stop at the first class that meets ALL critera. */
1672                         found = c;
1673                         break;
1674                 }
1675         }
1676
1677         /*
1678          * Okay, assuming we found a class that matches.. switch us into that class, keeping refcounts up to date.
1679          */
1680         if (found)
1681         {
1682                 MyClass = found;
1683         }
1684 }
1685
1686 /* looks up a users password for their connection class (<ALLOW>/<DENY> tags)
1687  * NOTE: If the <ALLOW> or <DENY> tag specifies an ip, and this user resolves,
1688  * then their ip will be taken as 'priority' anyway, so for example,
1689  * <connect allow="127.0.0.1"> will match joe!bloggs@localhost
1690  */
1691 ConnectClass* LocalUser::GetClass()
1692 {
1693         return MyClass;
1694 }
1695
1696 ConnectClass* User::GetClass()
1697 {
1698         return NULL;
1699 }
1700
1701 void User::PurgeEmptyChannels()
1702 {
1703         // firstly decrement the count on each channel
1704         for (UCListIter f = this->chans.begin(); f != this->chans.end(); f++)
1705         {
1706                 Channel* c = *f;
1707                 c->DelUser(this);
1708         }
1709
1710         this->UnOper();
1711 }
1712
1713 const std::string& FakeUser::GetFullHost()
1714 {
1715         if (!ServerInstance->Config->HideWhoisServer.empty())
1716                 return ServerInstance->Config->HideWhoisServer;
1717         return server;
1718 }
1719
1720 const std::string& FakeUser::GetFullRealHost()
1721 {
1722         if (!ServerInstance->Config->HideWhoisServer.empty())
1723                 return ServerInstance->Config->HideWhoisServer;
1724         return server;
1725 }
1726
1727 ConnectClass::ConnectClass(ConfigTag* tag, char t, const std::string& mask)
1728         : config(tag), type(t), fakelag(true), name("unnamed"), registration_timeout(0), host(mask),
1729         pingtime(0), softsendqmax(0), hardsendqmax(0), recvqmax(0),
1730         penaltythreshold(0), commandrate(0), maxlocal(0), maxglobal(0), maxconnwarn(true), maxchans(0), limit(0)
1731 {
1732 }
1733
1734 ConnectClass::ConnectClass(ConfigTag* tag, char t, const std::string& mask, const ConnectClass& parent)
1735         : config(tag), type(t), fakelag(parent.fakelag), name("unnamed"),
1736         registration_timeout(parent.registration_timeout), host(mask), pingtime(parent.pingtime),
1737         softsendqmax(parent.softsendqmax), hardsendqmax(parent.hardsendqmax), recvqmax(parent.recvqmax),
1738         penaltythreshold(parent.penaltythreshold), commandrate(parent.commandrate),
1739         maxlocal(parent.maxlocal), maxglobal(parent.maxglobal), maxconnwarn(parent.maxconnwarn), maxchans(parent.maxchans),
1740         limit(parent.limit)
1741 {
1742 }
1743
1744 void ConnectClass::Update(const ConnectClass* src)
1745 {
1746         config = src->config;
1747         type = src->type;
1748         fakelag = src->fakelag;
1749         name = src->name;
1750         registration_timeout = src->registration_timeout;
1751         host = src->host;
1752         pingtime = src->pingtime;
1753         softsendqmax = src->softsendqmax;
1754         hardsendqmax = src->hardsendqmax;
1755         recvqmax = src->recvqmax;
1756         penaltythreshold = src->penaltythreshold;
1757         commandrate = src->commandrate;
1758         maxlocal = src->maxlocal;
1759         maxglobal = src->maxglobal;
1760         maxconnwarn = src->maxconnwarn;
1761         maxchans = src->maxchans;
1762         limit = src->limit;
1763 }