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
 550         ClearInvites();
 551         eh.cull();
 552         return User::cull();
 553 }
 554
 555 CullResult FakeUser::cull()
 556 {
 557         // Fake users don't quit, they just get culled.
 558         quitting = true;
 559         ServerInstance->Users->clientlist->erase(nick);
 560         ServerInstance->Users->uuidlist->erase(uuid);
 561         return User::cull();
 562 }
 563
 564 void User::Oper(OperInfo* info)
 565 {
 566         if (this->IsModeSet('o'))
 567                 this->UnOper();
 568
 569         this->modes[UM_OPERATOR] = 1;
 570         this->oper = info;
 571         this->WriteServ("MODE %s :+o", this->nick.c_str());
 572         FOREACH_MOD(I_OnOper, OnOper(this, info->name));
 573
 574         std::string opername;
 575         if (info->oper_block)
 576                 opername = info->oper_block->getString("name");
 577
 578         if (IS_LOCAL(this))
 579         {
 580                 LocalUser* l = IS_LOCAL(this);
 581                 std::string vhost = oper->getConfig("vhost");
 582                 if (!vhost.empty())
 583                         l->ChangeDisplayedHost(vhost.c_str());
 584                 std::string opClass = oper->getConfig("class");
 585                 if (!opClass.empty())
 586                         l->SetClass(opClass);
 587         }
 588
 589         ServerInstance->SNO->WriteToSnoMask('o',"%s (%s@%s) is now an IRC operator of type %s (using oper '%s')",
 590                 nick.c_str(), ident.c_str(), host.c_str(), oper->NameStr(), opername.c_str());
 591         this->WriteNumeric(381, "%s :You are now %s %s", nick.c_str(), strchr("aeiouAEIOU", oper->name[0]) ? "an" : "a", oper->NameStr());
 592
 593         ServerInstance->Logs->Log("OPER", DEFAULT, "%s opered as type: %s", GetFullRealHost().c_str(), oper->NameStr());
 594         ServerInstance->Users->all_opers.push_back(this);
 595
 596         // Expand permissions from config for faster lookup
 597         if (IS_LOCAL(this))
 598                 oper->init();
 599
 600         FOREACH_MOD(I_OnPostOper,OnPostOper(this, oper->name, opername));
 601 }
 602
 603 void OperInfo::init()
 604 {
 605         AllowedOperCommands.clear();
 606         AllowedPrivs.clear();
 607         AllowedUserModes.reset();
 608         AllowedChanModes.reset();
 609         AllowedUserModes['o' - 'A'] = true; // Call me paranoid if you want.
 610
 611         for(std::vector<reference<ConfigTag> >::iterator iter = class_blocks.begin(); iter != class_blocks.end(); ++iter)
 612         {
 613                 ConfigTag* tag = *iter;
 614                 std::string mycmd, mypriv;
 615                 /* Process commands */
 616                 irc::spacesepstream CommandList(tag->getString("commands"));
 617                 while (CommandList.GetToken(mycmd))
 618                 {
 619                         AllowedOperCommands.insert(mycmd);
 620                 }
 621
 622                 irc::spacesepstream PrivList(tag->getString("privs"));
 623                 while (PrivList.GetToken(mypriv))
 624                 {
 625                         AllowedPrivs.insert(mypriv);
 626                 }
 627
 628                 std::string modes = tag->getString("usermodes");
 629                 for (std::string::const_iterator c = modes.begin(); c != modes.end(); ++c)
 630                 {
 631                         if (*c == '*')
 632                         {
 633                                 this->AllowedUserModes.set();
 634                         }
 635                         else if (*c >= 'A' && *c < 'z')
 636                         {
 637                                 this->AllowedUserModes[*c - 'A'] = true;
 638                         }
 639                 }
 640
 641                 modes = tag->getString("chanmodes");
 642                 for (std::string::const_iterator c = modes.begin(); c != modes.end(); ++c)
 643                 {
 644                         if (*c == '*')
 645                         {
 646                                 this->AllowedChanModes.set();
 647                         }
 648                         else if (*c >= 'A' && *c < 'z')
 649                         {
 650                                 this->AllowedChanModes[*c - 'A'] = true;
 651                         }
 652                 }
 653         }
 654 }
 655
 656 void User::UnOper()
 657 {
 658         if (!IS_OPER(this))
 659                 return;
 660
 661         /*
 662          * unset their oper type (what IS_OPER checks).
 663          * note, order is important - this must come before modes as -o attempts
 664          * to call UnOper. -- w00t
 665          */
 666         oper = NULL;
 667
 668
 669         /* Remove all oper only modes from the user when the deoper - Bug #466*/
 670         std::string moderemove("-");
 671
 672         for (unsigned char letter = 'A'; letter <= 'z'; letter++)
 673         {
 674                 ModeHandler* mh = ServerInstance->Modes->FindMode(letter, MODETYPE_USER);
 675                 if (mh && mh->NeedsOper())
 676                         moderemove += letter;
 677         }
 678
 679
 680         std::vector<std::string> parameters;
 681         parameters.push_back(this->nick);
 682         parameters.push_back(moderemove);
 683
 684         ServerInstance->Parser->CallHandler("MODE", parameters, this);
 685
 686         /* remove the user from the oper list. Will remove multiple entries as a safeguard against bug #404 */
 687         ServerInstance->Users->all_opers.remove(this);
 688
 689         this->modes[UM_OPERATOR] = 0;
 690 }
 691
 692 /* adds or updates an entry in the whowas list */
 693 void User::AddToWhoWas()
 694 {
 695         Module* whowas = ServerInstance->Modules->Find("cmd_whowas.so");
 696         if (whowas)
 697         {
 698                 WhowasRequest req(NULL, whowas, WhowasRequest::WHOWAS_ADD);
 699                 req.user = this;
 700                 req.Send();
 701         }
 702 }
 703
 704 /*
 705  * Check class restrictions
 706  */
 707 void LocalUser::CheckClass()
 708 {
 709         ConnectClass* a = this->MyClass;
 710
 711         if (!a)
 712         {
 713                 ServerInstance->Users->QuitUser(this, "Access denied by configuration");
 714                 return;
 715         }
 716         else if (a->type == CC_DENY)
 717         {
 718                 ServerInstance->Users->QuitUser(this, a->config->getString("reason", "Unauthorised connection"));
 719                 return;
 720         }
 721         else if ((a->GetMaxLocal()) && (ServerInstance->Users->LocalCloneCount(this) > a->GetMaxLocal()))
 722         {
 723                 ServerInstance->Users->QuitUser(this, "No more connections allowed from your host via this connect class (local)");
 724                 if (a->maxconnwarn)
 725                         ServerInstance->SNO->WriteToSnoMask('a', "WARNING: maximum LOCAL connections (%ld) exceeded for IP %s", a->GetMaxLocal(), this->GetIPString());
 726                 return;
 727         }
 728         else if ((a->GetMaxGlobal()) && (ServerInstance->Users->GlobalCloneCount(this) > a->GetMaxGlobal()))
 729         {
 730                 ServerInstance->Users->QuitUser(this, "No more connections allowed from your host via this connect class (global)");
 731                 if (a->maxconnwarn)
 732                         ServerInstance->SNO->WriteToSnoMask('a', "WARNING: maximum GLOBAL connections (%ld) exceeded for IP %s", a->GetMaxGlobal(), this->GetIPString());
 733                 return;
 734         }
 735
 736         this->nping = ServerInstance->Time() + a->GetPingTime() + ServerInstance->Config->dns_timeout;
 737 }
 738
 739 bool User::CheckLines(bool doZline)
 740 {
 741         const char* check[] = { "G" , "K", (doZline) ? "Z" : NULL, NULL };
 742
 743         if (!this->exempt)
 744         {
 745                 for (int n = 0; check[n]; ++n)
 746                 {
 747                         XLine *r = ServerInstance->XLines->MatchesLine(check[n], this);
 748
 749                         if (r)
 750                         {
 751                                 r->Apply(this);
 752                                 return true;
 753                         }
 754                 }
 755         }
 756
 757         return false;
 758 }
 759
 760 void LocalUser::FullConnect()
 761 {
 762         ServerInstance->stats->statsConnects++;
 763         this->idle_lastmsg = ServerInstance->Time();
 764
 765         /*
 766          * You may be thinking "wtf, we checked this in User::AddClient!" - and yes, we did, BUT.
 767          * At the time AddClient is called, we don't have a resolved host, by here we probably do - which
 768          * may put the user into a totally seperate class with different restrictions! so we *must* check again.
 769          * Don't remove this! -- w00t
 770          */
 771         MyClass = NULL;
 772         SetClass();
 773         CheckClass();
 774         CheckLines();
 775
 776         if (quitting)
 777                 return;
 778
 779         if (ServerInstance->Config->WelcomeNotice)
 780                 this->WriteServ("NOTICE Auth :Welcome to \002%s\002!",ServerInstance->Config->Network.c_str());
 781         this->WriteNumeric(RPL_WELCOME, "%s :Welcome to the %s IRC Network %s",this->nick.c_str(), ServerInstance->Config->Network.c_str(), GetFullRealHost().c_str());
 782         this->WriteNumeric(RPL_YOURHOSTIS, "%s :Your host is %s, running version %s",this->nick.c_str(),ServerInstance->Config->ServerName.c_str(),BRANCH);
 783         this->WriteNumeric(RPL_SERVERCREATED, "%s :This server was created %s %s", this->nick.c_str(), __TIME__, __DATE__);
 784
 785         std::string umlist = ServerInstance->Modes->UserModeList();
 786         std::string cmlist = ServerInstance->Modes->ChannelModeList();
 787         std::string pmlist = ServerInstance->Modes->ParaModeList();
 788         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());
 789
 790         ServerInstance->Config->Send005(this);
 791         this->WriteNumeric(RPL_YOURUUID, "%s %s :your unique ID", this->nick.c_str(), this->uuid.c_str());
 792
 793         /* Now registered */
 794         if (ServerInstance->Users->unregistered_count)
 795                 ServerInstance->Users->unregistered_count--;
 796
 797         /* Trigger MOTD and LUSERS output, give modules a chance too */
 798         ModResult MOD_RESULT;
 799         std::string command("MOTD");
 800         std::vector<std::string> parameters;
 801         FIRST_MOD_RESULT(OnPreCommand, MOD_RESULT, (command, parameters, this, true, command));
 802         if (!MOD_RESULT)
 803                 ServerInstance->Parser->CallHandler(command, parameters, this);
 804
 805         MOD_RESULT = MOD_RES_PASSTHRU;
 806         command = "LUSERS";
 807         FIRST_MOD_RESULT(OnPreCommand, MOD_RESULT, (command, parameters, this, true, command));
 808         if (!MOD_RESULT)
 809                 ServerInstance->Parser->CallHandler(command, parameters, this);
 810
 811         if (ServerInstance->Config->RawLog)
 812                 WriteServ("PRIVMSG %s :*** Raw I/O logging is enabled on this server. All messages, passwords, and commands are being recorded.", nick.c_str());
 813
 814         /*
 815          * We don't set REG_ALL until triggering OnUserConnect, so some module events don't spew out stuff
 816          * for a user that doesn't exist yet.
 817          */
 818         FOREACH_MOD(I_OnUserConnect,OnUserConnect(this));
 819
 820         this->registered = REG_ALL;
 821
 822         FOREACH_MOD(I_OnPostConnect,OnPostConnect(this));
 823
 824         ServerInstance->SNO->WriteToSnoMask('c',"Client connecting on port %d (class %s): %s (%s) [%s]",
 825                 this->GetServerPort(), this->MyClass->name.c_str(), GetFullRealHost().c_str(), this->GetIPString(), this->fullname.c_str());
 826         ServerInstance->Logs->Log("BANCACHE", DEBUG, "BanCache: Adding NEGATIVE hit for %s", this->GetIPString());
 827         ServerInstance->BanCache->AddHit(this->GetIPString(), "", "");
 828         // reset the flood penalty (which could have been raised due to things like auto +x)
 829         CommandFloodPenalty = 0;
 830 }
 831
 832 void User::InvalidateCache()
 833 {
 834         /* Invalidate cache */
 835         cached_fullhost.clear();
 836         cached_hostip.clear();
 837         cached_makehost.clear();
 838         cached_fullrealhost.clear();
 839 }
 840
 841 bool User::ChangeNick(const std::string& newnick, bool force)
 842 {
 843         ModResult MOD_RESULT;
 844
 845         if (force)
 846                 ServerInstance->NICKForced.set(this, 1);
 847         FIRST_MOD_RESULT(OnUserPreNick, MOD_RESULT, (this, newnick));
 848         ServerInstance->NICKForced.set(this, 0);
 849
 850         if (MOD_RESULT == MOD_RES_DENY)
 851         {
 852                 ServerInstance->stats->statsCollisions++;
 853                 return false;
 854         }
 855
 856         if (assign(newnick) == assign(nick))
 857         {
 858                 // case change, don't need to check Q:lines and such
 859                 // and, if it's identical including case, we can leave right now
 860                 if (newnick == nick)
 861                         return true;
 862         }
 863         else
 864         {
 865                 /*
 866                  * Don't check Q:Lines if it's a server-enforced change, just on the off-chance some fucking *moron*
 867                  * tries to Q:Line SIDs, also, this means we just get our way period, as it really should be.
 868                  * Thanks Kein for finding this. -- w00t
 869                  *
 870                  * Also don't check Q:Lines for remote nickchanges, they should have our Q:Lines anyway to enforce themselves.
 871                  *              -- w00t
 872                  */
 873                 if (IS_LOCAL(this) && !force)
 874                 {
 875                         XLine* mq = ServerInstance->XLines->MatchesLine("Q",newnick);
 876                         if (mq)
 877                         {
 878                                 if (this->registered == REG_ALL)
 879                                 {
 880                                         ServerInstance->SNO->WriteGlobalSno('a', "Q-Lined nickname %s from %s: %s",
 881                                                 newnick.c_str(), GetFullRealHost().c_str(), mq->reason.c_str());
 882                                 }
 883                                 this->WriteNumeric(432, "%s %s :Invalid nickname: %s",this->nick.c_str(), newnick.c_str(), mq->reason.c_str());
 884                                 return false;
 885                         }
 886
 887                         if (ServerInstance->Config->RestrictBannedUsers)
 888                         {
 889                                 for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
 890                                 {
 891                                         Channel *chan = *i;
 892                                         if (chan->GetPrefixValue(this) < VOICE_VALUE && chan->IsBanned(this))
 893                                         {
 894                                                 this->WriteNumeric(404, "%s %s :Cannot send to channel (you're banned)", this->nick.c_str(), chan->name.c_str());
 895                                                 return false;
 896                                         }
 897                                 }
 898                         }
 899                 }
 900
 901                 /*
 902                  * Uh oh.. if the nickname is in use, and it's not in use by the person using it (doh) --
 903                  * then we have a potential collide. Check whether someone else is camping on the nick
 904                  * (i.e. connect -> send NICK, don't send USER.) If they are camping, force-change the
 905                  * camper to their UID, and allow the incoming nick change.
 906                  *
 907                  * If the guy using the nick is already using it, tell the incoming nick change to gtfo,
 908                  * because the nick is already (rightfully) in use. -- w00t
 909                  */
 910                 User* InUse = ServerInstance->FindNickOnly(newnick);
 911                 if (InUse && (InUse != this))
 912                 {
 913                         if (InUse->registered != REG_ALL)
 914                         {
 915                                 /* force the camper to their UUID, and ask them to re-send a NICK. */
 916                                 InUse->WriteTo(InUse, "NICK %s", InUse->uuid.c_str());
 917                                 InUse->WriteNumeric(433, "%s %s :Nickname overruled.", InUse->nick.c_str(), InUse->nick.c_str());
 918
 919                                 ServerInstance->Users->clientlist->erase(InUse->nick);
 920                                 (*(ServerInstance->Users->clientlist))[InUse->uuid] = InUse;
 921
 922                                 InUse->nick = InUse->uuid;
 923                                 InUse->InvalidateCache();
 924                                 InUse->registered &= ~REG_NICK;
 925                         }
 926                         else
 927                         {
 928                                 /* No camping, tell the incoming user  to stop trying to change nick ;p */
 929                                 this->WriteNumeric(433, "%s %s :Nickname is already in use.", this->registered >= REG_NICK ? this->nick.c_str() : "*", newnick.c_str());
 930                                 return false;
 931                         }
 932                 }
 933         }
 934
 935         if (this->registered == REG_ALL)
 936                 this->WriteCommon("NICK %s",newnick.c_str());
 937         std::string oldnick = nick;
 938         nick = newnick;
 939
 940         InvalidateCache();
 941         ServerInstance->Users->clientlist->erase(oldnick);
 942         (*(ServerInstance->Users->clientlist))[newnick] = this;
 943
 944         if (registered == REG_ALL)
 945                 FOREACH_MOD(I_OnUserPostNick,OnUserPostNick(this,oldnick));
 946
 947         return true;
 948 }
 949
 950 int LocalUser::GetServerPort()
 951 {
 952         switch (this->server_sa.sa.sa_family)
 953         {
 954                 case AF_INET6:
 955                         return htons(this->server_sa.in6.sin6_port);
 956                 case AF_INET:
 957                         return htons(this->server_sa.in4.sin_port);
 958         }
 959         return 0;
 960 }
 961
 962 const char* User::GetIPString()
 963 {
 964         int port;
 965         if (cachedip.empty())
 966         {
 967                 irc::sockets::satoap(client_sa, cachedip, port);
 968                 /* IP addresses starting with a : on irc are a Bad Thing (tm) */
 969                 if (cachedip.c_str()[0] == ':')
 970                         cachedip.insert(0,1,'0');
 971         }
 972
 973         return cachedip.c_str();
 974 }
 975
 976 irc::sockets::cidr_mask User::GetCIDRMask()
 977 {
 978         int range = 0;
 979         switch (client_sa.sa.sa_family)
 980         {
 981                 case AF_INET6:
 982                         range = ServerInstance->Config->c_ipv6_range;
 983                         break;
 984                 case AF_INET:
 985                         range = ServerInstance->Config->c_ipv4_range;
 986                         break;
 987         }
 988         return irc::sockets::cidr_mask(client_sa, range);
 989 }
 990
 991 bool User::SetClientIP(const char* sip, bool recheck_eline)
 992 {
 993         cachedip.clear();
 994         cached_hostip.clear();
 995         return irc::sockets::aptosa(sip, 0, client_sa);
 996 }
 997
 998 void User::SetClientIP(const irc::sockets::sockaddrs& sa, bool recheck_eline)
 999 {
1000         cachedip.clear();
1001         cached_hostip.clear();
1002         memcpy(&client_sa, &sa, sizeof(irc::sockets::sockaddrs));
1003 }
1004
1005 bool LocalUser::SetClientIP(const char* sip, bool recheck_eline)
1006 {
1007         irc::sockets::sockaddrs sa;
1008         if (!irc::sockets::aptosa(sip, 0, sa))
1009                 // Invalid
1010                 return false;
1011
1012         LocalUser::SetClientIP(sa, recheck_eline);
1013         return true;
1014 }
1015
1016 void LocalUser::SetClientIP(const irc::sockets::sockaddrs& sa, bool recheck_eline)
1017 {
1018         if (sa != client_sa)
1019         {
1020                 User::SetClientIP(sa);
1021                 if (recheck_eline)
1022                         this->exempt = (ServerInstance->XLines->MatchesLine("E", this) != NULL);
1023
1024                 FOREACH_MOD(I_OnSetUserIP,OnSetUserIP(this));
1025         }
1026 }
1027
1028 static std::string wide_newline("\r\n");
1029
1030 void User::Write(const std::string& text)
1031 {
1032 }
1033
1034 void User::Write(const char *text, ...)
1035 {
1036 }
1037
1038 void LocalUser::Write(const std::string& text)
1039 {
1040         if (!ServerInstance->SE->BoundsCheckFd(&eh))
1041                 return;
1042
1043         if (text.length() > MAXBUF - 2)
1044         {
1045                 // this should happen rarely or never. Crop the string at 512 and try again.
1046                 std::string try_again = text.substr(0, MAXBUF - 2);
1047                 Write(try_again);
1048                 return;
1049         }
1050
1051         ServerInstance->Logs->Log("USEROUTPUT", RAWIO, "C[%s] O %s", uuid.c_str(), text.c_str());
1052
1053         eh.AddWriteBuf(text);
1054         eh.AddWriteBuf(wide_newline);
1055
1056         ServerInstance->stats->statsSent += text.length() + 2;
1057         this->bytes_out += text.length() + 2;
1058         this->cmds_out++;
1059 }
1060
1061 /** Write()
1062  */
1063 void LocalUser::Write(const char *text, ...)
1064 {
1065         va_list argsPtr;
1066         char textbuffer[MAXBUF];
1067
1068         va_start(argsPtr, text);
1069         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1070         va_end(argsPtr);
1071
1072         this->Write(std::string(textbuffer));
1073 }
1074
1075 void User::WriteServ(const std::string& text)
1076 {
1077         this->Write(":%s %s",ServerInstance->Config->ServerName.c_str(),text.c_str());
1078 }
1079
1080 /** WriteServ()
1081  *  Same as Write(), except `text' is prefixed with `:server.name '.
1082  */
1083 void User::WriteServ(const char* text, ...)
1084 {
1085         va_list argsPtr;
1086         char textbuffer[MAXBUF];
1087
1088         va_start(argsPtr, text);
1089         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1090         va_end(argsPtr);
1091
1092         this->WriteServ(std::string(textbuffer));
1093 }
1094
1095
1096 void User::WriteNumeric(unsigned int numeric, const char* text, ...)
1097 {
1098         va_list argsPtr;
1099         char textbuffer[MAXBUF];
1100
1101         va_start(argsPtr, text);
1102         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1103         va_end(argsPtr);
1104
1105         this->WriteNumeric(numeric, std::string(textbuffer));
1106 }
1107
1108 void User::WriteNumeric(unsigned int numeric, const std::string &text)
1109 {
1110         char textbuffer[MAXBUF];
1111         ModResult MOD_RESULT;
1112
1113         FIRST_MOD_RESULT(OnNumeric, MOD_RESULT, (this, numeric, text));
1114
1115         if (MOD_RESULT == MOD_RES_DENY)
1116                 return;
1117
1118         snprintf(textbuffer,MAXBUF,":%s %03u %s",ServerInstance->Config->ServerName.c_str(), numeric, text.c_str());
1119         this->Write(std::string(textbuffer));
1120 }
1121
1122 void User::WriteFrom(User *user, const std::string &text)
1123 {
1124         char tb[MAXBUF];
1125
1126         snprintf(tb,MAXBUF,":%s %s",user->GetFullHost().c_str(),text.c_str());
1127
1128         this->Write(std::string(tb));
1129 }
1130
1131
1132 /* write text from an originating user to originating user */
1133
1134 void User::WriteFrom(User *user, const char* text, ...)
1135 {
1136         va_list argsPtr;
1137         char textbuffer[MAXBUF];
1138
1139         va_start(argsPtr, text);
1140         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1141         va_end(argsPtr);
1142
1143         this->WriteFrom(user, std::string(textbuffer));
1144 }
1145
1146
1147 /* write text to an destination user from a source user (e.g. user privmsg) */
1148
1149 void User::WriteTo(User *dest, const char *data, ...)
1150 {
1151         char textbuffer[MAXBUF];
1152         va_list argsPtr;
1153
1154         va_start(argsPtr, data);
1155         vsnprintf(textbuffer, MAXBUF, data, argsPtr);
1156         va_end(argsPtr);
1157
1158         this->WriteTo(dest, std::string(textbuffer));
1159 }
1160
1161 void User::WriteTo(User *dest, const std::string &data)
1162 {
1163         dest->WriteFrom(this, data);
1164 }
1165
1166 void User::WriteCommon(const char* text, ...)
1167 {
1168         char textbuffer[MAXBUF];
1169         va_list argsPtr;
1170
1171         if (this->registered != REG_ALL || quitting)
1172                 return;
1173
1174         int len = snprintf(textbuffer,MAXBUF,":%s ",this->GetFullHost().c_str());
1175
1176         va_start(argsPtr, text);
1177         vsnprintf(textbuffer + len, MAXBUF - len, text, argsPtr);
1178         va_end(argsPtr);
1179
1180         this->WriteCommonRaw(std::string(textbuffer), true);
1181 }
1182
1183 void User::WriteCommonExcept(const char* text, ...)
1184 {
1185         char textbuffer[MAXBUF];
1186         va_list argsPtr;
1187
1188         if (this->registered != REG_ALL || quitting)
1189                 return;
1190
1191         int len = snprintf(textbuffer,MAXBUF,":%s ",this->GetFullHost().c_str());
1192
1193         va_start(argsPtr, text);
1194         vsnprintf(textbuffer + len, MAXBUF - len, text, argsPtr);
1195         va_end(argsPtr);
1196
1197         this->WriteCommonRaw(std::string(textbuffer), false);
1198 }
1199
1200 void User::WriteCommonRaw(const std::string &line, bool include_self)
1201 {
1202         if (this->registered != REG_ALL || quitting)
1203                 return;
1204
1205         LocalUser::already_sent_id++;
1206
1207         UserChanList include_c(chans);
1208         std::map<User*,bool> exceptions;
1209
1210         exceptions[this] = include_self;
1211
1212         FOREACH_MOD(I_OnBuildNeighborList,OnBuildNeighborList(this, include_c, exceptions));
1213
1214         for (std::map<User*,bool>::iterator i = exceptions.begin(); i != exceptions.end(); ++i)
1215         {
1216                 LocalUser* u = IS_LOCAL(i->first);
1217                 if (u && !u->quitting)
1218                 {
1219                         u->already_sent = LocalUser::already_sent_id;
1220                         if (i->second)
1221                                 u->Write(line);
1222                 }
1223         }
1224         for (UCListIter v = include_c.begin(); v != include_c.end(); ++v)
1225         {
1226                 Channel* c = *v;
1227                 const UserMembList* ulist = c->GetUsers();
1228                 for (UserMembList::const_iterator i = ulist->begin(); i != ulist->end(); i++)
1229                 {
1230                         LocalUser* u = IS_LOCAL(i->first);
1231                         if (u && !u->quitting && u->already_sent != LocalUser::already_sent_id)
1232                         {
1233                                 u->already_sent = LocalUser::already_sent_id;
1234                                 u->Write(line);
1235                         }
1236                 }
1237         }
1238 }
1239
1240 void User::WriteCommonQuit(const std::string &normal_text, const std::string &oper_text)
1241 {
1242         char tb1[MAXBUF];
1243         char tb2[MAXBUF];
1244
1245         if (this->registered != REG_ALL)
1246                 return;
1247
1248         already_sent_t uniq_id = ++LocalUser::already_sent_id;
1249
1250         snprintf(tb1,MAXBUF,":%s QUIT :%s",this->GetFullHost().c_str(),normal_text.c_str());
1251         snprintf(tb2,MAXBUF,":%s QUIT :%s",this->GetFullHost().c_str(),oper_text.c_str());
1252         std::string out1 = tb1;
1253         std::string out2 = tb2;
1254
1255         UserChanList include_c(chans);
1256         std::map<User*,bool> exceptions;
1257
1258         FOREACH_MOD(I_OnBuildNeighborList,OnBuildNeighborList(this, include_c, exceptions));
1259
1260         for (std::map<User*,bool>::iterator i = exceptions.begin(); i != exceptions.end(); ++i)
1261         {
1262                 LocalUser* u = IS_LOCAL(i->first);
1263                 if (u && !u->quitting)
1264                 {
1265                         u->already_sent = uniq_id;
1266                         if (i->second)
1267                                 u->Write(IS_OPER(u) ? out2 : out1);
1268                 }
1269         }
1270         for (UCListIter v = include_c.begin(); v != include_c.end(); ++v)
1271         {
1272                 const UserMembList* ulist = (*v)->GetUsers();
1273                 for (UserMembList::const_iterator i = ulist->begin(); i != ulist->end(); i++)
1274                 {
1275                         LocalUser* u = IS_LOCAL(i->first);
1276                         if (u && !u->quitting && (u->already_sent != uniq_id))
1277                         {
1278                                 u->already_sent = uniq_id;
1279                                 u->Write(IS_OPER(u) ? out2 : out1);
1280                         }
1281                 }
1282         }
1283 }
1284
1285 void LocalUser::SendText(const std::string& line)
1286 {
1287         Write(line);
1288 }
1289
1290 void RemoteUser::SendText(const std::string& line)
1291 {
1292         ServerInstance->PI->PushToClient(this, line);
1293 }
1294
1295 void FakeUser::SendText(const std::string& line)
1296 {
1297 }
1298
1299 void User::SendText(const char *text, ...)
1300 {
1301         va_list argsPtr;
1302         char line[MAXBUF];
1303
1304         va_start(argsPtr, text);
1305         vsnprintf(line, MAXBUF, text, argsPtr);
1306         va_end(argsPtr);
1307
1308         SendText(std::string(line));
1309 }
1310
1311 void User::SendText(const std::string &LinePrefix, std::stringstream &TextStream)
1312 {
1313         char line[MAXBUF];
1314         int start_pos = LinePrefix.length();
1315         int pos = start_pos;
1316         memcpy(line, LinePrefix.data(), pos);
1317         std::string Word;
1318         while (TextStream >> Word)
1319         {
1320                 int len = Word.length();
1321                 if (pos + len + 12 > MAXBUF)
1322                 {
1323                         line[pos] = '\0';
1324                         SendText(std::string(line));
1325                         pos = start_pos;
1326                 }
1327                 line[pos] = ' ';
1328                 memcpy(line + pos + 1, Word.data(), len);
1329                 pos += len + 1;
1330         }
1331         line[pos] = '\0';
1332         SendText(std::string(line));
1333 }
1334
1335 /* return 0 or 1 depending if users u and u2 share one or more common channels
1336  * (used by QUIT, NICK etc which arent channel specific notices)
1337  *
1338  * The old algorithm in 1.0 for this was relatively inefficient, iterating over
1339  * the first users channels then the second users channels within the outer loop,
1340  * therefore it was a maximum of x*y iterations (upon returning 0 and checking
1341  * all possible iterations). However this new function instead checks against the
1342  * channel's userlist in the inner loop which is a std::map<User*,User*>
1343  * and saves us time as we already know what pointer value we are after.
1344  * Don't quote me on the maths as i am not a mathematician or computer scientist,
1345  * but i believe this algorithm is now x+(log y) maximum iterations instead.
1346  */
1347 bool User::SharesChannelWith(User *other)
1348 {
1349         if ((!other) || (this->registered != REG_ALL) || (other->registered != REG_ALL))
1350                 return false;
1351
1352         /* Outer loop */
1353         for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1354         {
1355                 /* Eliminate the inner loop (which used to be ~equal in size to the outer loop)
1356                  * by replacing it with a map::find which *should* be more efficient
1357                  */
1358                 if ((*i)->HasUser(other))
1359                         return true;
1360         }
1361         return false;
1362 }
1363
1364 bool User::ChangeName(const char* gecos)
1365 {
1366         if (!this->fullname.compare(gecos))
1367                 return true;
1368
1369         if (IS_LOCAL(this))
1370         {
1371                 ModResult MOD_RESULT;
1372                 FIRST_MOD_RESULT(OnChangeLocalUserGECOS, MOD_RESULT, (IS_LOCAL(this),gecos));
1373                 if (MOD_RESULT == MOD_RES_DENY)
1374                         return false;
1375                 FOREACH_MOD(I_OnChangeName,OnChangeName(this,gecos));
1376         }
1377         this->fullname.assign(gecos, 0, ServerInstance->Config->Limits.MaxGecos);
1378
1379         return true;
1380 }
1381
1382 void User::DoHostCycle(const std::string &quitline)
1383 {
1384         char buffer[MAXBUF];
1385
1386         if (!ServerInstance->Config->CycleHosts)
1387                 return;
1388
1389         already_sent_t silent_id = ++LocalUser::already_sent_id;
1390         already_sent_t seen_id = ++LocalUser::already_sent_id;
1391
1392         UserChanList include_c(chans);
1393         std::map<User*,bool> exceptions;
1394
1395         FOREACH_MOD(I_OnBuildNeighborList,OnBuildNeighborList(this, include_c, exceptions));
1396
1397         for (std::map<User*,bool>::iterator i = exceptions.begin(); i != exceptions.end(); ++i)
1398         {
1399                 LocalUser* u = IS_LOCAL(i->first);
1400                 if (u && !u->quitting)
1401                 {
1402                         if (i->second)
1403                         {
1404                                 u->already_sent = seen_id;
1405                                 u->Write(quitline);
1406                         }
1407                         else
1408                         {
1409                                 u->already_sent = silent_id;
1410                         }
1411                 }
1412         }
1413         for (UCListIter v = include_c.begin(); v != include_c.end(); ++v)
1414         {
1415                 Channel* c = *v;
1416                 snprintf(buffer, MAXBUF, ":%s JOIN %s", GetFullHost().c_str(), c->name.c_str());
1417                 std::string joinline(buffer);
1418                 Membership* memb = c->GetUser(this);
1419                 std::string modeline = memb->modes;
1420                 if (modeline.length() > 0)
1421                 {
1422                         for(unsigned int i=0; i < memb->modes.length(); i++)
1423                                 modeline.append(" ").append(nick);
1424                         snprintf(buffer, MAXBUF, ":%s MODE %s +%s",
1425                                 ServerInstance->Config->CycleHostsFromUser ? GetFullHost().c_str() : ServerInstance->Config->ServerName.c_str(),
1426                                 c->name.c_str(), modeline.c_str());
1427                         modeline = buffer;
1428                 }
1429
1430                 const UserMembList *ulist = c->GetUsers();
1431                 for (UserMembList::const_iterator i = ulist->begin(); i != ulist->end(); i++)
1432                 {
1433                         LocalUser* u = IS_LOCAL(i->first);
1434                         if (u == NULL || u == this)
1435                                 continue;
1436                         if (u->already_sent == silent_id)
1437                                 continue;
1438
1439                         if (u->already_sent != seen_id)
1440                         {
1441                                 u->Write(quitline);
1442                                 u->already_sent = seen_id;
1443                         }
1444                         u->Write(joinline);
1445                         if (modeline.length() > 0)
1446                                 u->Write(modeline);
1447                 }
1448         }
1449 }
1450
1451 bool User::ChangeDisplayedHost(const char* shost)
1452 {
1453         if (dhost == shost)
1454                 return true;
1455
1456         if (IS_LOCAL(this))
1457         {
1458                 ModResult MOD_RESULT;
1459                 FIRST_MOD_RESULT(OnChangeLocalUserHost, MOD_RESULT, (IS_LOCAL(this),shost));
1460                 if (MOD_RESULT == MOD_RES_DENY)
1461                         return false;
1462         }
1463
1464         FOREACH_MOD(I_OnChangeHost, OnChangeHost(this,shost));
1465
1466         std::string quitstr = ":" + GetFullHost() + " QUIT :Changing host";
1467
1468         /* Fix by Om: User::dhost is 65 long, this was truncating some long hosts */
1469         this->dhost.assign(shost, 0, 64);
1470
1471         this->InvalidateCache();
1472
1473         this->DoHostCycle(quitstr);
1474
1475         if (IS_LOCAL(this))
1476                 this->WriteNumeric(RPL_YOURDISPLAYEDHOST, "%s %s :is now your displayed host",this->nick.c_str(),this->dhost.c_str());
1477
1478         return true;
1479 }
1480
1481 bool User::ChangeIdent(const char* newident)
1482 {
1483         if (this->ident == newident)
1484                 return true;
1485
1486         FOREACH_MOD(I_OnChangeIdent, OnChangeIdent(this,newident));
1487
1488         std::string quitstr = ":" + GetFullHost() + " QUIT :Changing ident";
1489
1490         this->ident.assign(newident, 0, ServerInstance->Config->Limits.IdentMax);
1491
1492         this->InvalidateCache();
1493
1494         this->DoHostCycle(quitstr);
1495
1496         return true;
1497 }
1498
1499 void User::SendAll(const char* command, const char* text, ...)
1500 {
1501         char textbuffer[MAXBUF];
1502         char formatbuffer[MAXBUF];
1503         va_list argsPtr;
1504
1505         va_start(argsPtr, text);
1506         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1507         va_end(argsPtr);
1508
1509         snprintf(formatbuffer,MAXBUF,":%s %s $* :%s", this->GetFullHost().c_str(), command, textbuffer);
1510         std::string fmt = formatbuffer;
1511
1512         for (LocalUserList::const_iterator i = ServerInstance->Users->local_users.begin(); i != ServerInstance->Users->local_users.end(); i++)
1513         {
1514                 if ((*i)->registered == REG_ALL)
1515                         (*i)->Write(fmt);
1516         }
1517 }
1518
1519
1520 std::string User::ChannelList(User* source, bool spy)
1521 {
1522         std::string list;
1523
1524         for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1525         {
1526                 Channel* c = *i;
1527                 /* If the target is the sender, neither +p nor +s is set, or
1528                  * the channel contains the user, it is not a spy channel
1529                  */
1530                 if (spy != (source == this || !(c->IsModeSet('p') || c->IsModeSet('s')) || c->HasUser(source)))
1531                         list.append(c->GetPrefixChar(this)).append(c->name).append(" ");
1532         }
1533
1534         return list;
1535 }
1536
1537 void User::SplitChanList(User* dest, const std::string &cl)
1538 {
1539         std::string line;
1540         std::ostringstream prefix;
1541         std::string::size_type start, pos, length;
1542
1543         prefix << this->nick << " " << dest->nick << " :";
1544         line = prefix.str();
1545         int namelen = ServerInstance->Config->ServerName.length() + 6;
1546
1547         for (start = 0; (pos = cl.find(' ', start)) != std::string::npos; start = pos+1)
1548         {
1549                 length = (pos == std::string::npos) ? cl.length() : pos;
1550
1551                 if (line.length() + namelen + length - start > 510)
1552                 {
1553                         ServerInstance->SendWhoisLine(this, dest, 319, "%s", line.c_str());
1554                         line = prefix.str();
1555                 }
1556
1557                 if(pos == std::string::npos)
1558                 {
1559                         line.append(cl.substr(start, length - start));
1560                         break;
1561                 }
1562                 else
1563                 {
1564                         line.append(cl.substr(start, length - start + 1));
1565                 }
1566         }
1567
1568         if (line.length() != prefix.str().length())
1569         {
1570                 ServerInstance->SendWhoisLine(this, dest, 319, "%s", line.c_str());
1571         }
1572 }
1573
1574 /*
1575  * Sets a user's connection class.
1576  * If the class name is provided, it will be used. Otherwise, the class will be guessed using host/ip/ident/etc.
1577  * NOTE: If the <ALLOW> or <DENY> tag specifies an ip, and this user resolves,
1578  * then their ip will be taken as 'priority' anyway, so for example,
1579  * <connect allow="127.0.0.1"> will match joe!bloggs@localhost
1580  */
1581 void LocalUser::SetClass(const std::string &explicit_name)
1582 {
1583         ConnectClass *found = NULL;
1584
1585         ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Setting connect class for UID %s", this->uuid.c_str());
1586
1587         if (!explicit_name.empty())
1588         {
1589                 for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++)
1590                 {
1591                         ConnectClass* c = *i;
1592
1593                         if (explicit_name == c->name)
1594                         {
1595                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Explicitly set to %s", explicit_name.c_str());
1596                                 found = c;
1597                         }
1598                 }
1599         }
1600         else
1601         {
1602                 for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++)
1603                 {
1604                         ConnectClass* c = *i;
1605                         ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Checking %s", c->GetName().c_str());
1606
1607                         ModResult MOD_RESULT;
1608                         FIRST_MOD_RESULT(OnSetConnectClass, MOD_RESULT, (this,c));
1609                         if (MOD_RESULT == MOD_RES_DENY)
1610                                 continue;
1611                         if (MOD_RESULT == MOD_RES_ALLOW)
1612                         {
1613                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Class forced by module to %s", c->GetName().c_str());
1614                                 found = c;
1615                                 break;
1616                         }
1617
1618                         if (c->type == CC_NAMED)
1619                                 continue;
1620
1621                         bool regdone = (registered != REG_NONE);
1622                         if (c->config->getBool("registered", regdone) != regdone)
1623                                 continue;
1624
1625                         /* check if host matches.. */
1626                         if (!InspIRCd::MatchCIDR(this->GetIPString(), c->GetHost(), NULL) &&
1627                             !InspIRCd::MatchCIDR(this->host, c->GetHost(), NULL))
1628                         {
1629                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "No host match (for %s)", c->GetHost().c_str());
1630                                 continue;
1631                         }
1632
1633                         /*
1634                          * deny change if change will take class over the limit check it HERE, not after we found a matching class,
1635                          * because we should attempt to find another class if this one doesn't match us. -- w00t
1636                          */
1637                         if (c->limit && (c->GetReferenceCount() >= c->limit))
1638                         {
1639                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "OOPS: Connect class limit (%lu) hit, denying", c->limit);
1640                                 continue;
1641                         }
1642
1643                         /* if it requires a port ... */
1644                         int port = c->config->getInt("port");
1645                         if (port)
1646                         {
1647                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Requires port (%d)", port);
1648
1649                                 /* and our port doesn't match, fail. */
1650                                 if (this->GetServerPort() != port)
1651                                         continue;
1652                         }
1653
1654                         if (regdone && !c->config->getString("password").empty())
1655                         {
1656                                 if (ServerInstance->PassCompare(this, c->config->getString("password"), password, c->config->getString("hash")))
1657                                 {
1658                                         ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Bad password, skipping");
1659                                         continue;
1660                                 }
1661                         }
1662
1663                         /* we stop at the first class that meets ALL critera. */
1664                         found = c;
1665                         break;
1666                 }
1667         }
1668
1669         /*
1670          * Okay, assuming we found a class that matches.. switch us into that class, keeping refcounts up to date.
1671          */
1672         if (found)
1673         {
1674                 MyClass = found;
1675         }
1676 }
1677
1678 /* looks up a users password for their connection class (<ALLOW>/<DENY> tags)
1679  * NOTE: If the <ALLOW> or <DENY> tag specifies an ip, and this user resolves,
1680  * then their ip will be taken as 'priority' anyway, so for example,
1681  * <connect allow="127.0.0.1"> will match joe!bloggs@localhost
1682  */
1683 ConnectClass* LocalUser::GetClass()
1684 {
1685         return MyClass;
1686 }
1687
1688 ConnectClass* User::GetClass()
1689 {
1690         return NULL;
1691 }
1692
1693 void User::PurgeEmptyChannels()
1694 {
1695         // firstly decrement the count on each channel
1696         for (UCListIter f = this->chans.begin(); f != this->chans.end(); f++)
1697         {
1698                 Channel* c = *f;
1699                 c->DelUser(this);
1700         }
1701
1702         this->UnOper();
1703 }
1704
1705 const std::string& FakeUser::GetFullHost()
1706 {
1707         if (!ServerInstance->Config->HideWhoisServer.empty())
1708                 return ServerInstance->Config->HideWhoisServer;
1709         return server;
1710 }
1711
1712 const std::string& FakeUser::GetFullRealHost()
1713 {
1714         if (!ServerInstance->Config->HideWhoisServer.empty())
1715                 return ServerInstance->Config->HideWhoisServer;
1716         return server;
1717 }
1718
1719 ConnectClass::ConnectClass(ConfigTag* tag, char t, const std::string& mask)
1720         : config(tag), type(t), fakelag(true), name("unnamed"), registration_timeout(0), host(mask),
1721         pingtime(0), softsendqmax(0), hardsendqmax(0), recvqmax(0),
1722         penaltythreshold(0), commandrate(0), maxlocal(0), maxglobal(0), maxconnwarn(true), maxchans(0), limit(0)
1723 {
1724 }
1725
1726 ConnectClass::ConnectClass(ConfigTag* tag, char t, const std::string& mask, const ConnectClass& parent)
1727         : config(tag), type(t), fakelag(parent.fakelag), name("unnamed"),
1728         registration_timeout(parent.registration_timeout), host(mask), pingtime(parent.pingtime),
1729         softsendqmax(parent.softsendqmax), hardsendqmax(parent.hardsendqmax), recvqmax(parent.recvqmax),
1730         penaltythreshold(parent.penaltythreshold), commandrate(parent.commandrate),
1731         maxlocal(parent.maxlocal), maxglobal(parent.maxglobal), maxconnwarn(parent.maxconnwarn), maxchans(parent.maxchans),
1732         limit(parent.limit)
1733 {
1734 }
1735
1736 void ConnectClass::Update(const ConnectClass* src)
1737 {
1738         config = src->config;
1739         type = src->type;
1740         fakelag = src->fakelag;
1741         name = src->name;
1742         registration_timeout = src->registration_timeout;
1743         host = src->host;
1744         pingtime = src->pingtime;
1745         softsendqmax = src->softsendqmax;
1746         hardsendqmax = src->hardsendqmax;
1747         recvqmax = src->recvqmax;
1748         penaltythreshold = src->penaltythreshold;
1749         commandrate = src->commandrate;
1750         maxlocal = src->maxlocal;
1751         maxglobal = src->maxglobal;
1752         maxconnwarn = src->maxconnwarn;
1753         maxchans = src->maxchans;
1754         limit = src->limit;
1755 }