src/users.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2008 InspIRCd Development Team
   6  * See: http://www.inspircd.org/wiki/index.php/Credits
   7  *
   8  * This program is free but copyrighted software; see
   9  *            the file COPYING for details.
  10  *
  11  * ---------------------------------------------------
  12  */
  13
  14 /* $Core: libIRCDusers */
  15
  16 #include "inspircd.h"
  17 #include <stdarg.h>
  18 #include "socketengine.h"
  19 #include "wildcard.h"
  20 #include "xline.h"
  21 #include "bancache.h"
  22 #include "commands/cmd_whowas.h"
  23
  24 static unsigned long* already_sent = NULL;
  25
  26
  27 void InitializeAlreadySent(SocketEngine* SE)
  28 {
  29         already_sent = new unsigned long[SE->GetMaxFds()];
  30         memset(already_sent, 0, sizeof(already_sent));
  31 }
  32
  33 /* XXX: Used for speeding up WriteCommon operations */
  34 unsigned long uniq_id = 1;
  35
  36 std::string User::ProcessNoticeMasks(const char *sm)
  37 {
  38         bool adding = true, oldadding = false;
  39         const char *c = sm;
  40         std::string output;
  41
  42         while (c && *c)
  43         {
  44                 switch (*c)
  45                 {
  46                         case '+':
  47                                 adding = true;
  48                         break;
  49                         case '-':
  50                                 adding = false;
  51                         break;
  52                         case '*':
  53                                 for (unsigned char d = 'A'; d <= 'z'; d++)
  54                                 {
  55                                         if (ServerInstance->SNO->IsEnabled(d))
  56                                         {
  57                                                 if ((!IsNoticeMaskSet(d) && adding) || (IsNoticeMaskSet(d) && !adding))
  58                                                 {
  59                                                         if ((oldadding != adding) || (!output.length()))
  60                                                                 output += (adding ? '+' : '-');
  61
  62                                                         this->SetNoticeMask(d, adding);
  63
  64                                                         output += d;
  65                                                 }
  66                                         }
  67                                         oldadding = adding;
  68                                 }
  69                         break;
  70                         default:
  71                                 if ((*c >= 'A') && (*c <= 'z') && (ServerInstance->SNO->IsEnabled(*c)))
  72                                 {
  73                                         if ((!IsNoticeMaskSet(*c) && adding) || (IsNoticeMaskSet(*c) && !adding))
  74                                         {
  75                                                 if ((oldadding != adding) || (!output.length()))
  76                                                         output += (adding ? '+' : '-');
  77
  78                                                 this->SetNoticeMask(*c, adding);
  79
  80                                                 output += *c;
  81                                         }
  82                                 }
  83                                 else
  84                                         this->WriteNumeric(501, "%s %c :is unknown snomask char to me", this->nick, *c);
  85
  86                                 oldadding = adding;
  87                         break;
  88                 }
  89
  90                 *c++;
  91         }
  92
  93         return output;
  94 }
  95
  96 void User::StartDNSLookup()
  97 {
  98         try
  99         {
 100                 bool cached;
 101                 const char* sip = this->GetIPString(false);
 102
 103                 /* Special case for 4in6 (Have i mentioned i HATE 4in6?) */
 104                 if (!strncmp(sip, "0::ffff:", 8))
 105                         res_reverse = new UserResolver(this->ServerInstance, this, sip + 8, DNS_QUERY_PTR4, cached);
 106                 else
 107                         res_reverse = new UserResolver(this->ServerInstance, this, sip, this->GetProtocolFamily() == AF_INET ? DNS_QUERY_PTR4 : DNS_QUERY_PTR6, cached);
 108
 109                 this->ServerInstance->AddResolver(res_reverse, cached);
 110         }
 111         catch (CoreException& e)
 112         {
 113                 ServerInstance->Logs->Log("USERS", DEBUG,"Error in resolver: %s",e.GetReason());
 114         }
 115 }
 116
 117 bool User::IsNoticeMaskSet(unsigned char sm)
 118 {
 119         return (snomasks[sm-65]);
 120 }
 121
 122 void User::SetNoticeMask(unsigned char sm, bool value)
 123 {
 124         snomasks[sm-65] = value;
 125 }
 126
 127 const char* User::FormatNoticeMasks()
 128 {
 129         static char data[MAXBUF];
 130         int offset = 0;
 131
 132         for (int n = 0; n < 64; n++)
 133         {
 134                 if (snomasks[n])
 135                         data[offset++] = n+65;
 136         }
 137
 138         data[offset] = 0;
 139         return data;
 140 }
 141
 142
 143
 144 bool User::IsModeSet(unsigned char m)
 145 {
 146         return (modes[m-65]);
 147 }
 148
 149 void User::SetMode(unsigned char m, bool value)
 150 {
 151         modes[m-65] = value;
 152 }
 153
 154 const char* User::FormatModes()
 155 {
 156         static char data[MAXBUF];
 157         int offset = 0;
 158         for (int n = 0; n < 64; n++)
 159         {
 160                 if (modes[n])
 161                         data[offset++] = n+65;
 162         }
 163         data[offset] = 0;
 164         return data;
 165 }
 166
 167 void User::DecrementModes()
 168 {
 169         ServerInstance->Logs->Log("USERS", DEBUG, "DecrementModes()");
 170         for (unsigned char n = 'A'; n <= 'z'; n++)
 171         {
 172                 if (modes[n-65])
 173                 {
 174                         ServerInstance->Logs->Log("USERS", DEBUG,"DecrementModes() found mode %c", n);
 175                         ModeHandler* mh = ServerInstance->Modes->FindMode(n, MODETYPE_USER);
 176                         if (mh)
 177                         {
 178                                 ServerInstance->Logs->Log("USERS", DEBUG,"Found handler %c and call ChangeCount", n);
 179                                 mh->ChangeCount(-1);
 180                         }
 181                 }
 182         }
 183 }
 184
 185 User::User(InspIRCd* Instance, const std::string &uid) : ServerInstance(Instance)
 186 {
 187         *password = *nick = *ident = *host = *dhost = *fullname = *awaymsg = *oper = *uuid = 0;
 188         server = (char*)Instance->FindServerNamePtr(Instance->Config->ServerName);
 189         reset_due = ServerInstance->Time();
 190         age = ServerInstance->Time();
 191         Penalty = 0;
 192         lines_in = lastping = signon = idle_lastmsg = nping = registered = 0;
 193         ChannelCount = timeout = bytes_in = bytes_out = cmds_in = cmds_out = 0;
 194         quietquit = OverPenalty = ExemptFromPenalty = quitting = exempt = haspassed = dns_done = false;
 195         fd = -1;
 196         recvq.clear();
 197         sendq.clear();
 198         WriteError.clear();
 199         res_forward = res_reverse = NULL;
 200         Visibility = NULL;
 201         ip = NULL;
 202         MyClass = NULL;
 203         io = NULL;
 204         AllowedUserModes = NULL;
 205         AllowedChanModes = NULL;
 206         AllowedOperCommands = NULL;
 207         chans.clear();
 208         invites.clear();
 209         memset(modes,0,sizeof(modes));
 210         memset(snomasks,0,sizeof(snomasks));
 211         /* Invalidate cache */
 212         cached_fullhost = cached_hostip = cached_makehost = cached_fullrealhost = NULL;
 213
 214         if (uid.empty())
 215                 strlcpy(uuid, Instance->GetUID().c_str(), UUID_LENGTH);
 216         else
 217                 strlcpy(uuid, uid.c_str(), UUID_LENGTH);
 218
 219         ServerInstance->Logs->Log("USERS", DEBUG,"New UUID for user: %s (%s)", uuid, uid.empty() ? "allocated new" : "used remote");
 220
 221         user_hash::iterator finduuid = Instance->Users->uuidlist->find(uuid);
 222         if (finduuid == Instance->Users->uuidlist->end())
 223                 (*Instance->Users->uuidlist)[uuid] = this;
 224         else
 225                 throw CoreException("Duplicate UUID "+std::string(uuid)+" in User constructor");
 226 }
 227
 228 User::~User()
 229 {
 230         /* NULL for remote users :) */
 231         if (this->MyClass)
 232         {
 233                 this->MyClass->RefCount--;
 234                 ServerInstance->Logs->Log("USERS", DEBUG, "User destructor -- connect refcount now: %lu", this->MyClass->RefCount);
 235         }
 236         if (this->AllowedOperCommands)
 237         {
 238                 delete AllowedOperCommands;
 239                 AllowedOperCommands = NULL;
 240         }
 241
 242         if (this->AllowedUserModes)
 243         {
 244                 delete[] AllowedUserModes;
 245                 AllowedUserModes = NULL;
 246         }
 247
 248         if (this->AllowedChanModes)
 249         {
 250                 delete[] AllowedChanModes;
 251                 AllowedChanModes = NULL;
 252         }
 253
 254         this->InvalidateCache();
 255         this->DecrementModes();
 256
 257         if (ip)
 258         {
 259                 ServerInstance->Users->RemoveCloneCounts(this);
 260
 261                 if (this->GetProtocolFamily() == AF_INET)
 262                 {
 263                         delete (sockaddr_in*)ip;
 264                 }
 265 #ifdef SUPPORT_IP6LINKS
 266                 else
 267                 {
 268                         delete (sockaddr_in6*)ip;
 269                 }
 270 #endif
 271         }
 272
 273         ServerInstance->Users->uuidlist->erase(uuid);
 274 }
 275
 276 char* User::MakeHost()
 277 {
 278         if (this->cached_makehost)
 279                 return this->cached_makehost;
 280
 281         char nhost[MAXBUF];
 282         /* This is much faster than snprintf */
 283         char* t = nhost;
 284         for(char* n = ident; *n; n++)
 285                 *t++ = *n;
 286         *t++ = '@';
 287         for(char* n = host; *n; n++)
 288                 *t++ = *n;
 289         *t = 0;
 290
 291         this->cached_makehost = strdup(nhost);
 292
 293         return this->cached_makehost;
 294 }
 295
 296 char* User::MakeHostIP()
 297 {
 298         if (this->cached_hostip)
 299                 return this->cached_hostip;
 300
 301         char ihost[MAXBUF];
 302         /* This is much faster than snprintf */
 303         char* t = ihost;
 304         for(char* n = ident; *n; n++)
 305                 *t++ = *n;
 306         *t++ = '@';
 307         for(const char* n = this->GetIPString(); *n; n++)
 308                 *t++ = *n;
 309         *t = 0;
 310
 311         this->cached_hostip = strdup(ihost);
 312
 313         return this->cached_hostip;
 314 }
 315
 316 void User::CloseSocket()
 317 {
 318         if (this->fd > -1)
 319         {
 320                 ServerInstance->SE->Shutdown(this, 2);
 321                 ServerInstance->SE->Close(this);
 322         }
 323 }
 324
 325 char* User::GetFullHost()
 326 {
 327         if (this->cached_fullhost)
 328                 return this->cached_fullhost;
 329
 330         char result[MAXBUF];
 331         char* t = result;
 332         for(char* n = nick; *n; n++)
 333                 *t++ = *n;
 334         *t++ = '!';
 335         for(char* n = ident; *n; n++)
 336                 *t++ = *n;
 337         *t++ = '@';
 338         for(char* n = dhost; *n; n++)
 339                 *t++ = *n;
 340         *t = 0;
 341
 342         this->cached_fullhost = strdup(result);
 343
 344         return this->cached_fullhost;
 345 }
 346
 347 char* User::MakeWildHost()
 348 {
 349         static char nresult[MAXBUF];
 350         char* t = nresult;
 351         *t++ = '*';     *t++ = '!';
 352         *t++ = '*';     *t++ = '@';
 353         for(char* n = dhost; *n; n++)
 354                 *t++ = *n;
 355         *t = 0;
 356         return nresult;
 357 }
 358
 359 int User::ReadData(void* buffer, size_t size)
 360 {
 361         if (IS_LOCAL(this))
 362         {
 363 #ifndef WIN32
 364                 return read(this->fd, buffer, size);
 365 #else
 366                 return recv(this->fd, (char*)buffer, size, 0);
 367 #endif
 368         }
 369         else
 370                 return 0;
 371 }
 372
 373
 374 char* User::GetFullRealHost()
 375 {
 376         if (this->cached_fullrealhost)
 377                 return this->cached_fullrealhost;
 378
 379         char fresult[MAXBUF];
 380         char* t = fresult;
 381         for(char* n = nick; *n; n++)
 382                 *t++ = *n;
 383         *t++ = '!';
 384         for(char* n = ident; *n; n++)
 385                 *t++ = *n;
 386         *t++ = '@';
 387         for(char* n = host; *n; n++)
 388                 *t++ = *n;
 389         *t = 0;
 390
 391         this->cached_fullrealhost = strdup(fresult);
 392
 393         return this->cached_fullrealhost;
 394 }
 395
 396 bool User::IsInvited(const irc::string &channel)
 397 {
 398         time_t now = time(NULL);
 399         InvitedList::iterator safei;
 400         for (InvitedList::iterator i = invites.begin(); i != invites.end(); ++i)
 401         {
 402                 if (channel == i->first)
 403                 {
 404                         if (i->second != 0 && now > i->second)
 405                         {
 406                                 /* Expired invite, remove it. */
 407                                 safei = i;
 408                                 --i;
 409                                 invites.erase(safei);
 410                                 continue;
 411                         }
 412                         return true;
 413                 }
 414         }
 415         return false;
 416 }
 417
 418 InvitedList* User::GetInviteList()
 419 {
 420         time_t now = time(NULL);
 421         /* Weed out expired invites here. */
 422         InvitedList::iterator safei;
 423         for (InvitedList::iterator i = invites.begin(); i != invites.end(); ++i)
 424         {
 425                 if (i->second != 0 && now > i->second)
 426                 {
 427                         /* Expired invite, remove it. */
 428                         safei = i;
 429                         --i;
 430                         invites.erase(safei);
 431                 }
 432         }
 433         return &invites;
 434 }
 435
 436 void User::InviteTo(const irc::string &channel, time_t invtimeout)
 437 {
 438         time_t now = time(NULL);
 439         if (invtimeout != 0 && now > invtimeout) return; /* Don't add invites that are expired from the get-go. */
 440         for (InvitedList::iterator i = invites.begin(); i != invites.end(); ++i)
 441         {
 442                 if (channel == i->first)
 443                 {
 444                         if (i->second != 0 && invtimeout > i->second)
 445                         {
 446                                 i->second = invtimeout;
 447                         }
 448                 }
 449         }
 450         invites.push_back(std::make_pair(channel, invtimeout));
 451 }
 452
 453 void User::RemoveInvite(const irc::string &channel)
 454 {
 455         for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
 456         {
 457                 if (channel == i->first)
 458                 {
 459                         invites.erase(i);
 460                         return;
 461                 }
 462         }
 463 }
 464
 465 bool User::HasModePermission(unsigned char mode, ModeType type)
 466 {
 467         if (!IS_LOCAL(this))
 468                 return true;
 469
 470         if (!IS_OPER(this))
 471                 return false;
 472
 473         if (!AllowedUserModes || !AllowedChanModes)
 474                 return false;
 475
 476         return ((type == MODETYPE_USER ? AllowedUserModes : AllowedChanModes))[(mode - 'A')];
 477
 478 }
 479
 480 bool User::HasPermission(const std::string &command)
 481 {
 482         /*
 483          * users on remote servers can completely bypass all permissions based checks.
 484          * This prevents desyncs when one server has different type/class tags to another.
 485          * That having been said, this does open things up to the possibility of source changes
 486          * allowing remote kills, etc - but if they have access to the src, they most likely have
 487          * access to the conf - so it's an end to a means either way.
 488          */
 489         if (!IS_LOCAL(this))
 490                 return true;
 491
 492         // are they even an oper at all?
 493         if (!IS_OPER(this))
 494         {
 495                 return false;
 496         }
 497
 498         if (!AllowedOperCommands)
 499                 return false;
 500
 501         if (AllowedOperCommands->find(command) != AllowedOperCommands->end())
 502                 return true;
 503         else if (AllowedOperCommands->find("*") != AllowedOperCommands->end())
 504                 return true;
 505
 506         return false;
 507 }
 508
 509 /** NOTE: We cannot pass a const reference to this method.
 510  * The string is changed by the workings of the method,
 511  * so that if we pass const ref, we end up copying it to
 512  * something we can change anyway. Makes sense to just let
 513  * the compiler do that copy for us.
 514  */
 515 bool User::AddBuffer(std::string a)
 516 {
 517         try
 518         {
 519                 std::string::size_type i = a.rfind('\r');
 520
 521                 while (i != std::string::npos)
 522                 {
 523                         a.erase(i, 1);
 524                         i = a.rfind('\r');
 525                 }
 526
 527                 if (a.length())
 528                         recvq.append(a);
 529
 530                 if (this->MyClass && (recvq.length() > this->MyClass->GetRecvqMax()))
 531                 {
 532                         this->SetWriteError("RecvQ exceeded");
 533                         ServerInstance->SNO->WriteToSnoMask('A', "User %s RecvQ of %lu exceeds connect class maximum of %lu",this->nick,(unsigned long int)recvq.length(),this->MyClass->GetRecvqMax());
 534                         return false;
 535                 }
 536
 537                 return true;
 538         }
 539
 540         catch (...)
 541         {
 542                 ServerInstance->Logs->Log("USERS", DEBUG,"Exception in User::AddBuffer()");
 543                 return false;
 544         }
 545 }
 546
 547 bool User::BufferIsReady()
 548 {
 549         return (recvq.find('\n') != std::string::npos);
 550 }
 551
 552 void User::ClearBuffer()
 553 {
 554         recvq.clear();
 555 }
 556
 557 std::string User::GetBuffer()
 558 {
 559         try
 560         {
 561                 if (recvq.empty())
 562                         return "";
 563
 564                 /* Strip any leading \r or \n off the string.
 565                  * Usually there are only one or two of these,
 566                  * so its is computationally cheap to do.
 567                  */
 568                 std::string::iterator t = recvq.begin();
 569                 while (t != recvq.end() && (*t == '\r' || *t == '\n'))
 570                 {
 571                         recvq.erase(t);
 572                         t = recvq.begin();
 573                 }
 574
 575                 for (std::string::iterator x = recvq.begin(); x != recvq.end(); x++)
 576                 {
 577                         /* Find the first complete line, return it as the
 578                          * result, and leave the recvq as whats left
 579                          */
 580                         if (*x == '\n')
 581                         {
 582                                 std::string ret = std::string(recvq.begin(), x);
 583                                 recvq.erase(recvq.begin(), x + 1);
 584                                 return ret;
 585                         }
 586                 }
 587                 return "";
 588         }
 589
 590         catch (...)
 591         {
 592                 ServerInstance->Logs->Log("USERS", DEBUG,"Exception in User::GetBuffer()");
 593                 return "";
 594         }
 595 }
 596
 597 void User::AddWriteBuf(const std::string &data)
 598 {
 599         if (*this->GetWriteError())
 600                 return;
 601
 602         if (this->MyClass && (sendq.length() + data.length() > this->MyClass->GetSendqMax()))
 603         {
 604                 /*
 605                  * Fix by brain - Set the error text BEFORE calling, because
 606                  * if we dont it'll recursively  call here over and over again trying
 607                  * to repeatedly add the text to the sendq!
 608                  */
 609                 this->SetWriteError("SendQ exceeded");
 610                 ServerInstance->SNO->WriteToSnoMask('A', "User %s SendQ of %lu exceeds connect class maximum of %lu",this->nick,(unsigned long int)sendq.length() + data.length(),this->MyClass->GetSendqMax());
 611                 return;
 612         }
 613
 614         if (data.length() > MAXBUF - 2) /* MAXBUF has a value of 514, to account for line terminators */
 615                 sendq.append(data.substr(0,MAXBUF - 4)).append("\r\n"); /* MAXBUF-4 = 510 */
 616         else
 617                 sendq.append(data);
 618 }
 619
 620 // send AS MUCH OF THE USERS SENDQ as we are able to (might not be all of it)
 621 void User::FlushWriteBuf()
 622 {
 623         try
 624         {
 625                 if ((this->fd == FD_MAGIC_NUMBER) || (*this->GetWriteError()))
 626                 {
 627                         sendq.clear();
 628                 }
 629                 if ((sendq.length()) && (this->fd != FD_MAGIC_NUMBER))
 630                 {
 631                         int old_sendq_length = sendq.length();
 632                         int n_sent = ServerInstance->SE->Send(this, this->sendq.data(), this->sendq.length(), 0);
 633
 634                         if (n_sent == -1)
 635                         {
 636                                 if (errno == EAGAIN)
 637                                 {
 638                                         /* The socket buffer is full. This isnt fatal,
 639                                          * try again later.
 640                                          */
 641                                         this->ServerInstance->SE->WantWrite(this);
 642                                 }
 643                                 else
 644                                 {
 645                                         /* Fatal error, set write error and bail
 646                                          */
 647                                         this->SetWriteError(errno ? strerror(errno) : "EOF from client");
 648                                         return;
 649                                 }
 650                         }
 651                         else
 652                         {
 653                                 /* advance the queue */
 654                                 if (n_sent)
 655                                         this->sendq = this->sendq.substr(n_sent);
 656                                 /* update the user's stats counters */
 657                                 this->bytes_out += n_sent;
 658                                 this->cmds_out++;
 659                                 if (n_sent != old_sendq_length)
 660                                         this->ServerInstance->SE->WantWrite(this);
 661                         }
 662                 }
 663         }
 664
 665         catch (...)
 666         {
 667                 ServerInstance->Logs->Log("USERS", DEBUG,"Exception in User::FlushWriteBuf()");
 668         }
 669
 670         if (this->sendq.empty())
 671         {
 672                 FOREACH_MOD(I_OnBufferFlushed,OnBufferFlushed(this));
 673         }
 674 }
 675
 676 void User::SetWriteError(const std::string &error)
 677 {
 678         // don't try to set the error twice, its already set take the first string.
 679         if (this->WriteError.empty())
 680                 this->WriteError = error;
 681 }
 682
 683 const char* User::GetWriteError()
 684 {
 685         return this->WriteError.c_str();
 686 }
 687
 688 void User::Oper(const std::string &opertype, const std::string &opername)
 689 {
 690         char* mycmd;
 691         char* savept;
 692         char* savept2;
 693
 694         try
 695         {
 696                 this->modes[UM_OPERATOR] = 1;
 697                 this->WriteServ("MODE %s :+o", this->nick);
 698                 FOREACH_MOD(I_OnOper, OnOper(this, opertype));
 699                 ServerInstance->Logs->Log("OPER", DEFAULT, "%s!%s@%s opered as type: %s", this->nick, this->ident, this->host, opertype.c_str());
 700                 strlcpy(this->oper, opertype.c_str(), NICKMAX - 1);
 701                 ServerInstance->Users->all_opers.push_back(this);
 702
 703                 opertype_t::iterator iter_opertype = ServerInstance->Config->opertypes.find(this->oper);
 704                 if (iter_opertype != ServerInstance->Config->opertypes.end())
 705                 {
 706
 707                         if (AllowedOperCommands)
 708                                 AllowedOperCommands->clear();
 709                         else
 710                                 AllowedOperCommands = new std::map<std::string, bool>;
 711
 712                         if (!AllowedChanModes)
 713                                 AllowedChanModes = new bool[64];
 714
 715                         if (!AllowedUserModes)
 716                                 AllowedUserModes = new bool[64];
 717
 718                         memset(AllowedUserModes, 0, 64);
 719                         memset(AllowedChanModes, 0, 64);
 720
 721                         char* Classes = strdup(iter_opertype->second);
 722                         char* myclass = strtok_r(Classes," ",&savept);
 723                         while (myclass)
 724                         {
 725                                 operclass_t::iterator iter_operclass = ServerInstance->Config->operclass.find(myclass);
 726                                 if (iter_operclass != ServerInstance->Config->operclass.end())
 727                                 {
 728                                         char* CommandList = strdup(iter_operclass->second.commandlist);
 729                                         mycmd = strtok_r(CommandList," ",&savept2);
 730                                         while (mycmd)
 731                                         {
 732                                                 this->AllowedOperCommands->insert(std::make_pair(mycmd, true));
 733                                                 mycmd = strtok_r(NULL," ",&savept2);
 734                                         }
 735                                         free(CommandList);
 736                                         this->AllowedUserModes['o' - 'A'] = true; // Call me paranoid if you want.
 737                                         for (unsigned char* c = (unsigned char*)iter_operclass->second.umodelist; *c; ++c)
 738                                         {
 739                                                 if (*c == '*')
 740                                                 {
 741                                                         memset(this->AllowedUserModes, (int)(true), 64);
 742                                                 }
 743                                                 else
 744                                                 {
 745                                                         this->AllowedUserModes[*c - 'A'] = true;
 746                                                 }
 747                                         }
 748                                         for (unsigned char* c = (unsigned char*)iter_operclass->second.cmodelist; *c; ++c)
 749                                         {
 750                                                 if (*c == '*')
 751                                                 {
 752                                                         memset(this->AllowedChanModes, (int)(true), 64);
 753                                                 }
 754                                                 else
 755                                                 {
 756                                                         this->AllowedChanModes[*c - 'A'] = true;
 757                                                 }
 758                                         }
 759                                 }
 760                                 myclass = strtok_r(NULL," ",&savept);
 761                         }
 762                         free(Classes);
 763                 }
 764
 765                 FOREACH_MOD(I_OnPostOper,OnPostOper(this, opertype, opername));
 766         }
 767
 768         catch (...)
 769         {
 770                 ServerInstance->Logs->Log("OPER", DEBUG,"Exception in User::Oper()");
 771         }
 772 }
 773
 774 void User::UnOper()
 775 {
 776         if (IS_OPER(this))
 777         {
 778                 /* Remove all oper only modes from the user when the deoper - Bug #466*/
 779                 std::string moderemove("-");
 780
 781                 for (unsigned char letter = 'A'; letter <= 'z'; letter++)
 782                 {
 783                         if (letter != 'o')
 784                         {
 785                                 ModeHandler* mh = ServerInstance->Modes->FindMode(letter, MODETYPE_USER);
 786                                 if (mh && mh->NeedsOper())
 787                                         moderemove += letter;
 788                         }
 789                 }
 790
 791                 const char* parameters[] = { this->nick, moderemove.c_str() };
 792                 ServerInstance->Parser->CallHandler("MODE", parameters, 2, this);
 793
 794                 /* unset their oper type (what IS_OPER checks), and remove +o */
 795                 *this->oper = 0;
 796                 this->modes[UM_OPERATOR] = 0;
 797
 798                 /* remove the user from the oper list. Will remove multiple entries as a safeguard against bug #404 */
 799                 ServerInstance->Users->all_opers.remove(this);
 800
 801                 if (AllowedOperCommands)
 802                 {
 803                         delete AllowedOperCommands;
 804                         AllowedOperCommands = NULL;
 805                 }
 806                 if (AllowedUserModes)
 807                 {
 808                         delete[] AllowedUserModes;
 809                         AllowedUserModes = NULL;
 810                 }
 811                 if (AllowedChanModes)
 812                 {
 813                         delete[] AllowedChanModes;
 814                         AllowedChanModes = NULL;
 815                 }
 816
 817         }
 818 }
 819
 820 /* adds or updates an entry in the whowas list */
 821 void User::AddToWhoWas()
 822 {
 823         Command* whowas_command = ServerInstance->Parser->GetHandler("WHOWAS");
 824         if (whowas_command)
 825         {
 826                 std::deque<classbase*> params;
 827                 params.push_back(this);
 828                 whowas_command->HandleInternal(WHOWAS_ADD, params);
 829         }
 830 }
 831
 832 /*
 833  * Check class restrictions
 834  */
 835 void User::CheckClass()
 836 {
 837         ConnectClass* a = this->MyClass;
 838
 839         if ((!a) || (a->GetType() == CC_DENY))
 840         {
 841                 ServerInstance->Users->QuitUser(this, "Unauthorised connection");
 842                 return;
 843         }
 844         else if ((a->GetMaxLocal()) && (ServerInstance->Users->LocalCloneCount(this) > a->GetMaxLocal()))
 845         {
 846                 ServerInstance->Users->QuitUser(this, "No more connections allowed from your host via this connect class (local)");
 847                 ServerInstance->SNO->WriteToSnoMask('A', "WARNING: maximum LOCAL connections (%ld) exceeded for IP %s", a->GetMaxLocal(), this->GetIPString());
 848                 return;
 849         }
 850         else if ((a->GetMaxGlobal()) && (ServerInstance->Users->GlobalCloneCount(this) > a->GetMaxGlobal()))
 851         {
 852                 ServerInstance->Users->QuitUser(this, "No more connections allowed from your host via this connect class (global)");
 853                 ServerInstance->SNO->WriteToSnoMask('A', "WARNING: maximum GLOBAL connections (%ld) exceeded for IP %s", a->GetMaxGlobal(), this->GetIPString());
 854                 return;
 855         }
 856
 857         this->nping = ServerInstance->Time() + a->GetPingTime() + ServerInstance->Config->dns_timeout;
 858         this->timeout = ServerInstance->Time() + a->GetRegTimeout();
 859         this->MaxChans = a->GetMaxChans();
 860 }
 861
 862 void User::CheckLines()
 863 {
 864         const char* check[] = { "G" , "K", NULL };
 865
 866         if (!this->exempt)
 867         {
 868                 for (int n = 0; check[n]; ++n)
 869                 {
 870                         XLine *r = ServerInstance->XLines->MatchesLine(check[n], this);
 871
 872                         if (r)
 873                         {
 874                                 r->Apply(this);
 875                                 return;
 876                         }
 877                 }
 878         }
 879 }
 880
 881 void User::FullConnect()
 882 {
 883         ServerInstance->stats->statsConnects++;
 884         this->idle_lastmsg = ServerInstance->Time();
 885
 886         /*
 887          * You may be thinking "wtf, we checked this in User::AddClient!" - and yes, we did, BUT.
 888          * At the time AddClient is called, we don't have a resolved host, by here we probably do - which
 889          * may put the user into a totally seperate class with different restrictions! so we *must* check again.
 890          * Don't remove this! -- w00t
 891          */
 892         this->SetClass();
 893
 894         /* Check the password, if one is required by the user's connect class.
 895          * This CANNOT be in CheckClass(), because that is called prior to PASS as well!
 896          */
 897         if (this->MyClass && !this->MyClass->GetPass().empty() && !this->haspassed)
 898         {
 899                 ServerInstance->Users->QuitUser(this, "Invalid password");
 900                 return;
 901         }
 902
 903         CheckLines();
 904
 905         this->WriteServ("NOTICE Auth :Welcome to \002%s\002!",ServerInstance->Config->Network);
 906         this->WriteNumeric(001, "%s :Welcome to the %s IRC Network %s!%s@%s",this->nick, ServerInstance->Config->Network, this->nick, this->ident, this->host);
 907         this->WriteNumeric(002, "%s :Your host is %s, running version InspIRCd-1.2",this->nick,ServerInstance->Config->ServerName);
 908         this->WriteNumeric(003, "%s :This server was created %s %s", this->nick, __TIME__, __DATE__);
 909         this->WriteNumeric(004, "%s %s InspIRCd-1.2 %s %s %s", this->nick, ServerInstance->Config->ServerName, ServerInstance->Modes->UserModeList().c_str(), ServerInstance->Modes->ChannelModeList().c_str(), ServerInstance->Modes->ParaModeList().c_str());
 910
 911         ServerInstance->Config->Send005(this);
 912         this->WriteNumeric(42, "%s %s :your unique ID", this->nick, this->uuid);
 913
 914
 915         this->ShowMOTD();
 916
 917         /* Now registered */
 918         if (ServerInstance->Users->unregistered_count)
 919                 ServerInstance->Users->unregistered_count--;
 920
 921         /* Trigger LUSERS output, give modules a chance too */
 922         int MOD_RESULT = 0;
 923         FOREACH_RESULT(I_OnPreCommand, OnPreCommand("LUSERS", NULL, 0, this, true, "LUSERS"));
 924         if (!MOD_RESULT)
 925                 ServerInstance->CallCommandHandler("LUSERS", NULL, 0, this);
 926
 927         /*
 928          * We don't set REG_ALL until triggering OnUserConnect, so some module events don't spew out stuff
 929          * for a user that doesn't exist yet.
 930          */
 931         FOREACH_MOD(I_OnUserConnect,OnUserConnect(this));
 932
 933         this->registered = REG_ALL;
 934
 935         FOREACH_MOD(I_OnPostConnect,OnPostConnect(this));
 936
 937         ServerInstance->SNO->WriteToSnoMask('c',"Client connecting on port %d: %s!%s@%s [%s] [%s]", this->GetPort(), this->nick, this->ident, this->host, this->GetIPString(), this->fullname);
 938         ServerInstance->Logs->Log("BANCACHE", DEBUG, "BanCache: Adding NEGATIVE hit for %s", this->GetIPString());
 939         ServerInstance->BanCache->AddHit(this->GetIPString(), "", "");
 940 }
 941
 942 /** User::UpdateNick()
 943  * re-allocates a nick in the user_hash after they change nicknames,
 944  * returns a pointer to the new user as it may have moved
 945  */
 946 User* User::UpdateNickHash(const char* New)
 947 {
 948         //user_hash::iterator newnick;
 949         user_hash::iterator oldnick = ServerInstance->Users->clientlist->find(this->nick);
 950
 951         if (!strcasecmp(this->nick,New))
 952                 return oldnick->second;
 953
 954         if (oldnick == ServerInstance->Users->clientlist->end())
 955                 return NULL; /* doesnt exist */
 956
 957         User* olduser = oldnick->second;
 958         (*(ServerInstance->Users->clientlist))[New] = olduser;
 959         ServerInstance->Users->clientlist->erase(oldnick);
 960         return olduser;
 961 }
 962
 963 void User::InvalidateCache()
 964 {
 965         /* Invalidate cache */
 966         if (cached_fullhost)
 967                 free(cached_fullhost);
 968         if (cached_hostip)
 969                 free(cached_hostip);
 970         if (cached_makehost)
 971                 free(cached_makehost);
 972         if (cached_fullrealhost)
 973                 free(cached_fullrealhost);
 974         cached_fullhost = cached_hostip = cached_makehost = cached_fullrealhost = NULL;
 975 }
 976
 977 bool User::ForceNickChange(const char* newnick)
 978 {
 979         int MOD_RESULT = 0;
 980
 981         this->InvalidateCache();
 982
 983         FOREACH_RESULT(I_OnUserPreNick,OnUserPreNick(this, newnick));
 984
 985         if (MOD_RESULT)
 986         {
 987                 ServerInstance->stats->statsCollisions++;
 988                 return false;
 989         }
 990
 991         std::deque<classbase*> dummy;
 992         Command* nickhandler = ServerInstance->Parser->GetHandler("NICK");
 993         if (nickhandler) // wtfbbq, when would this not be here
 994         {
 995                 nickhandler->HandleInternal(1, dummy);
 996                 bool result = (ServerInstance->Parser->CallHandler("NICK", &newnick, 1, this) == CMD_SUCCESS);
 997                 nickhandler->HandleInternal(0, dummy);
 998                 return result;
 999         }
1000
1001         // Unreachable, we hope
1002         return false;
1003 }
1004
1005 void User::SetSockAddr(int protocol_family, const char* sip, int port)
1006 {
1007         this->cachedip = "";
1008
1009         switch (protocol_family)
1010         {
1011 #ifdef SUPPORT_IP6LINKS
1012                 case AF_INET6:
1013                 {
1014                         sockaddr_in6* sin = new sockaddr_in6;
1015                         sin->sin6_family = AF_INET6;
1016                         sin->sin6_port = port;
1017                         inet_pton(AF_INET6, sip, &sin->sin6_addr);
1018                         this->ip = (sockaddr*)sin;
1019                 }
1020                 break;
1021 #endif
1022                 case AF_INET:
1023                 {
1024                         sockaddr_in* sin = new sockaddr_in;
1025                         sin->sin_family = AF_INET;
1026                         sin->sin_port = port;
1027                         inet_pton(AF_INET, sip, &sin->sin_addr);
1028                         this->ip = (sockaddr*)sin;
1029                 }
1030                 break;
1031                 default:
1032                         ServerInstance->Logs->Log("USERS",DEBUG,"Uh oh, I dont know protocol %d to be set on '%s'!", protocol_family, this->nick);
1033                 break;
1034         }
1035 }
1036
1037 int User::GetPort()
1038 {
1039         if (this->ip == NULL)
1040                 return 0;
1041
1042         switch (this->GetProtocolFamily())
1043         {
1044 #ifdef SUPPORT_IP6LINKS
1045                 case AF_INET6:
1046                 {
1047                         sockaddr_in6* sin = (sockaddr_in6*)this->ip;
1048                         return sin->sin6_port;
1049                 }
1050                 break;
1051 #endif
1052                 case AF_INET:
1053                 {
1054                         sockaddr_in* sin = (sockaddr_in*)this->ip;
1055                         return sin->sin_port;
1056                 }
1057                 break;
1058                 default:
1059                 break;
1060         }
1061         return 0;
1062 }
1063
1064 int User::GetProtocolFamily()
1065 {
1066         if (this->ip == NULL)
1067                 return 0;
1068
1069         sockaddr_in* sin = (sockaddr_in*)this->ip;
1070         return sin->sin_family;
1071 }
1072
1073 /*
1074  * XXX the duplication here is horrid..
1075  * do we really need two methods doing essentially the same thing?
1076  */
1077 const char* User::GetIPString(bool translate4in6)
1078 {
1079         static char buf[1024];
1080
1081         if (this->ip == NULL)
1082                 return "";
1083
1084         if (!this->cachedip.empty())
1085                 return this->cachedip.c_str();
1086
1087         switch (this->GetProtocolFamily())
1088         {
1089 #ifdef SUPPORT_IP6LINKS
1090                 case AF_INET6:
1091                 {
1092                         static char temp[1024];
1093
1094                         sockaddr_in6* sin = (sockaddr_in6*)this->ip;
1095                         inet_ntop(sin->sin6_family, &sin->sin6_addr, buf, sizeof(buf));
1096                         /* IP addresses starting with a : on irc are a Bad Thing (tm) */
1097                         if (*buf == ':')
1098                         {
1099                                 strlcpy(&temp[1], buf, sizeof(temp) - 1);
1100                                 *temp = '0';
1101                                 if (translate4in6 && !strncmp(temp, "0::ffff:", 8))
1102                                 {
1103                                         this->cachedip = temp + 8;
1104                                         return temp + 8;
1105                                 }
1106
1107                                 this->cachedip = temp;
1108                                 return temp;
1109                         }
1110
1111                         this->cachedip = buf;
1112                         return buf;
1113                 }
1114                 break;
1115 #endif
1116                 case AF_INET:
1117                 {
1118                         sockaddr_in* sin = (sockaddr_in*)this->ip;
1119                         inet_ntop(sin->sin_family, &sin->sin_addr, buf, sizeof(buf));
1120                         this->cachedip = buf;
1121                         return buf;
1122                 }
1123                 break;
1124                 default:
1125                 break;
1126         }
1127
1128         // Unreachable, probably
1129         return "";
1130 }
1131
1132 /** NOTE: We cannot pass a const reference to this method.
1133  * The string is changed by the workings of the method,
1134  * so that if we pass const ref, we end up copying it to
1135  * something we can change anyway. Makes sense to just let
1136  * the compiler do that copy for us.
1137  */
1138 void User::Write(std::string text)
1139 {
1140         if (!ServerInstance->SE->BoundsCheckFd(this))
1141                 return;
1142
1143         try
1144         {
1145                 ServerInstance->Logs->Log("USEROUTPUT", DEBUG,"C[%d] O %s", this->GetFd(), text.c_str());
1146                 text.append("\r\n");
1147         }
1148         catch (...)
1149         {
1150                 ServerInstance->Logs->Log("USEROUTPUT", DEBUG,"Exception in User::Write() std::string::append");
1151                 return;
1152         }
1153
1154         if (this->io)
1155         {
1156                 /* XXX: The lack of buffering here is NOT a bug, modules implementing this interface have to
1157                  * implement their own buffering mechanisms
1158                  */
1159                 try
1160                 {
1161                         this->io->OnRawSocketWrite(this->fd, text.data(), text.length());
1162                 }
1163                 catch (CoreException& modexcept)
1164                 {
1165                         ServerInstance->Logs->Log("USEROUTPUT", DEBUG, "%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
1166                 }
1167         }
1168         else
1169         {
1170                 this->AddWriteBuf(text);
1171         }
1172         ServerInstance->stats->statsSent += text.length();
1173         this->ServerInstance->SE->WantWrite(this);
1174 }
1175
1176 /** Write()
1177  */
1178 void User::Write(const char *text, ...)
1179 {
1180         va_list argsPtr;
1181         char textbuffer[MAXBUF];
1182
1183         va_start(argsPtr, text);
1184         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1185         va_end(argsPtr);
1186
1187         this->Write(std::string(textbuffer));
1188 }
1189
1190 void User::WriteServ(const std::string& text)
1191 {
1192         char textbuffer[MAXBUF];
1193
1194         snprintf(textbuffer,MAXBUF,":%s %s",ServerInstance->Config->ServerName,text.c_str());
1195         this->Write(std::string(textbuffer));
1196 }
1197
1198 /** WriteServ()
1199  *  Same as Write(), except `text' is prefixed with `:server.name '.
1200  */
1201 void User::WriteServ(const char* text, ...)
1202 {
1203         va_list argsPtr;
1204         char textbuffer[MAXBUF];
1205
1206         va_start(argsPtr, text);
1207         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1208         va_end(argsPtr);
1209
1210         this->WriteServ(std::string(textbuffer));
1211 }
1212
1213
1214 void User::WriteNumeric(unsigned int numeric, const char* text, ...)
1215 {
1216         va_list argsPtr;
1217         char textbuffer[MAXBUF];
1218
1219         va_start(argsPtr, text);
1220         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1221         va_end(argsPtr);
1222
1223         this->WriteNumeric(numeric, std::string(textbuffer));
1224 }
1225
1226 void User::WriteNumeric(unsigned int numeric, const std::string &text)
1227 {
1228         char textbuffer[MAXBUF];
1229         int MOD_RESULT = 0;
1230
1231         FOREACH_RESULT(I_OnNumeric, OnNumeric(this, numeric, text));
1232
1233         if (MOD_RESULT)
1234                 return;
1235
1236         snprintf(textbuffer,MAXBUF,":%s %03u %s",ServerInstance->Config->ServerName, numeric, text.c_str());
1237         this->Write(std::string(textbuffer));
1238 }
1239
1240 void User::WriteFrom(User *user, const std::string &text)
1241 {
1242         char tb[MAXBUF];
1243
1244         snprintf(tb,MAXBUF,":%s %s",user->GetFullHost(),text.c_str());
1245
1246         this->Write(std::string(tb));
1247 }
1248
1249
1250 /* write text from an originating user to originating user */
1251
1252 void User::WriteFrom(User *user, const char* text, ...)
1253 {
1254         va_list argsPtr;
1255         char textbuffer[MAXBUF];
1256
1257         va_start(argsPtr, text);
1258         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1259         va_end(argsPtr);
1260
1261         this->WriteFrom(user, std::string(textbuffer));
1262 }
1263
1264
1265 /* write text to an destination user from a source user (e.g. user privmsg) */
1266
1267 void User::WriteTo(User *dest, const char *data, ...)
1268 {
1269         char textbuffer[MAXBUF];
1270         va_list argsPtr;
1271
1272         va_start(argsPtr, data);
1273         vsnprintf(textbuffer, MAXBUF, data, argsPtr);
1274         va_end(argsPtr);
1275
1276         this->WriteTo(dest, std::string(textbuffer));
1277 }
1278
1279 void User::WriteTo(User *dest, const std::string &data)
1280 {
1281         dest->WriteFrom(this, data);
1282 }
1283
1284
1285 void User::WriteCommon(const char* text, ...)
1286 {
1287         char textbuffer[MAXBUF];
1288         va_list argsPtr;
1289
1290         if (this->registered != REG_ALL)
1291                 return;
1292
1293         va_start(argsPtr, text);
1294         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1295         va_end(argsPtr);
1296
1297         this->WriteCommon(std::string(textbuffer));
1298 }
1299
1300 void User::WriteCommon(const std::string &text)
1301 {
1302         bool sent_to_at_least_one = false;
1303         char tb[MAXBUF];
1304
1305         if (this->registered != REG_ALL)
1306                 return;
1307
1308         uniq_id++;
1309
1310         if (!already_sent)
1311                 InitializeAlreadySent(ServerInstance->SE);
1312
1313         /* We dont want to be doing this n times, just once */
1314         snprintf(tb,MAXBUF,":%s %s",this->GetFullHost(),text.c_str());
1315         std::string out = tb;
1316
1317         for (UCListIter v = this->chans.begin(); v != this->chans.end(); v++)
1318         {
1319                 CUList* ulist = v->first->GetUsers();
1320                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1321                 {
1322                         if ((IS_LOCAL(i->first)) && (already_sent[i->first->fd] != uniq_id))
1323                         {
1324                                 already_sent[i->first->fd] = uniq_id;
1325                                 i->first->Write(out);
1326                                 sent_to_at_least_one = true;
1327                         }
1328                 }
1329         }
1330
1331         /*
1332          * if the user was not in any channels, no users will receive the text. Make sure the user
1333          * receives their OWN message for WriteCommon
1334          */
1335         if (!sent_to_at_least_one)
1336         {
1337                 this->Write(std::string(tb));
1338         }
1339 }
1340
1341
1342 /* write a formatted string to all users who share at least one common
1343  * channel, NOT including the source user e.g. for use in QUIT
1344  */
1345
1346 void User::WriteCommonExcept(const char* text, ...)
1347 {
1348         char textbuffer[MAXBUF];
1349         va_list argsPtr;
1350
1351         va_start(argsPtr, text);
1352         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1353         va_end(argsPtr);
1354
1355         this->WriteCommonExcept(std::string(textbuffer));
1356 }
1357
1358 void User::WriteCommonQuit(const std::string &normal_text, const std::string &oper_text)
1359 {
1360         char tb1[MAXBUF];
1361         char tb2[MAXBUF];
1362
1363         if (this->registered != REG_ALL)
1364                 return;
1365
1366         uniq_id++;
1367
1368         if (!already_sent)
1369                 InitializeAlreadySent(ServerInstance->SE);
1370
1371         snprintf(tb1,MAXBUF,":%s QUIT :%s",this->GetFullHost(),normal_text.c_str());
1372         snprintf(tb2,MAXBUF,":%s QUIT :%s",this->GetFullHost(),oper_text.c_str());
1373         std::string out1 = tb1;
1374         std::string out2 = tb2;
1375
1376         for (UCListIter v = this->chans.begin(); v != this->chans.end(); v++)
1377         {
1378                 CUList *ulist = v->first->GetUsers();
1379                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1380                 {
1381                         if (this != i->first)
1382                         {
1383                                 if ((IS_LOCAL(i->first)) && (already_sent[i->first->fd] != uniq_id))
1384                                 {
1385                                         already_sent[i->first->fd] = uniq_id;
1386                                         i->first->Write(IS_OPER(i->first) ? out2 : out1);
1387                                 }
1388                         }
1389                 }
1390         }
1391 }
1392
1393 void User::WriteCommonExcept(const std::string &text)
1394 {
1395         char tb1[MAXBUF];
1396         std::string out1;
1397
1398         if (this->registered != REG_ALL)
1399                 return;
1400
1401         uniq_id++;
1402
1403         if (!already_sent)
1404                 InitializeAlreadySent(ServerInstance->SE);
1405
1406         snprintf(tb1,MAXBUF,":%s %s",this->GetFullHost(),text.c_str());
1407         out1 = tb1;
1408
1409         for (UCListIter v = this->chans.begin(); v != this->chans.end(); v++)
1410         {
1411                 CUList *ulist = v->first->GetUsers();
1412                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1413                 {
1414                         if (this != i->first)
1415                         {
1416                                 if ((IS_LOCAL(i->first)) && (already_sent[i->first->fd] != uniq_id))
1417                                 {
1418                                         already_sent[i->first->fd] = uniq_id;
1419                                         i->first->Write(out1);
1420                                 }
1421                         }
1422                 }
1423         }
1424
1425 }
1426
1427 void User::WriteWallOps(const std::string &text)
1428 {
1429         if (!IS_LOCAL(this))
1430                 return;
1431
1432         std::string wallop("WALLOPS :");
1433         wallop.append(text);
1434
1435         for (std::vector<User*>::const_iterator i = ServerInstance->Users->local_users.begin(); i != ServerInstance->Users->local_users.end(); i++)
1436         {
1437                 User* t = *i;
1438                 if (t->IsModeSet('w'))
1439                         this->WriteTo(t,wallop);
1440         }
1441 }
1442
1443 void User::WriteWallOps(const char* text, ...)
1444 {
1445         if (!IS_LOCAL(this))
1446                 return;
1447
1448         char textbuffer[MAXBUF];
1449         va_list argsPtr;
1450
1451         va_start(argsPtr, text);
1452         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1453         va_end(argsPtr);
1454
1455         this->WriteWallOps(std::string(textbuffer));
1456 }
1457
1458 /* return 0 or 1 depending if users u and u2 share one or more common channels
1459  * (used by QUIT, NICK etc which arent channel specific notices)
1460  *
1461  * The old algorithm in 1.0 for this was relatively inefficient, iterating over
1462  * the first users channels then the second users channels within the outer loop,
1463  * therefore it was a maximum of x*y iterations (upon returning 0 and checking
1464  * all possible iterations). However this new function instead checks against the
1465  * channel's userlist in the inner loop which is a std::map<User*,User*>
1466  * and saves us time as we already know what pointer value we are after.
1467  * Don't quote me on the maths as i am not a mathematician or computer scientist,
1468  * but i believe this algorithm is now x+(log y) maximum iterations instead.
1469  */
1470 bool User::SharesChannelWith(User *other)
1471 {
1472         if ((!other) || (this->registered != REG_ALL) || (other->registered != REG_ALL))
1473                 return false;
1474
1475         /* Outer loop */
1476         for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1477         {
1478                 /* Eliminate the inner loop (which used to be ~equal in size to the outer loop)
1479                  * by replacing it with a map::find which *should* be more efficient
1480                  */
1481                 if (i->first->HasUser(other))
1482                         return true;
1483         }
1484         return false;
1485 }
1486
1487 bool User::ChangeName(const char* gecos)
1488 {
1489         if (!strcmp(gecos, this->fullname))
1490                 return true;
1491
1492         if (IS_LOCAL(this))
1493         {
1494                 int MOD_RESULT = 0;
1495                 FOREACH_RESULT(I_OnChangeLocalUserGECOS,OnChangeLocalUserGECOS(this,gecos));
1496                 if (MOD_RESULT)
1497                         return false;
1498                 FOREACH_MOD(I_OnChangeName,OnChangeName(this,gecos));
1499         }
1500         strlcpy(this->fullname,gecos,MAXGECOS+1);
1501
1502         return true;
1503 }
1504
1505 bool User::ChangeDisplayedHost(const char* shost)
1506 {
1507         if (!strcmp(shost, this->dhost))
1508                 return true;
1509
1510         if (IS_LOCAL(this))
1511         {
1512                 int MOD_RESULT = 0;
1513                 FOREACH_RESULT(I_OnChangeLocalUserHost,OnChangeLocalUserHost(this,shost));
1514                 if (MOD_RESULT)
1515                         return false;
1516                 FOREACH_MOD(I_OnChangeHost,OnChangeHost(this,shost));
1517         }
1518
1519         if (this->ServerInstance->Config->CycleHosts)
1520                 this->WriteCommonExcept("QUIT :Changing hosts");
1521
1522         /* Fix by Om: User::dhost is 65 long, this was truncating some long hosts */
1523         strlcpy(this->dhost,shost,64);
1524
1525         this->InvalidateCache();
1526
1527         if (this->ServerInstance->Config->CycleHosts)
1528         {
1529                 for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1530                 {
1531                         i->first->WriteAllExceptSender(this, false, 0, "JOIN %s", i->first->name);
1532                         std::string n = this->ServerInstance->Modes->ModeString(this, i->first);
1533                         if (n.length() > 0)
1534                                 i->first->WriteAllExceptSender(this, true, 0, "MODE %s +%s", i->first->name, n.c_str());
1535                 }
1536         }
1537
1538         if (IS_LOCAL(this))
1539                 this->WriteNumeric(396, "%s %s :is now your displayed host",this->nick,this->dhost);
1540
1541         return true;
1542 }
1543
1544 bool User::ChangeIdent(const char* newident)
1545 {
1546         if (!strcmp(newident, this->ident))
1547                 return true;
1548
1549         if (this->ServerInstance->Config->CycleHosts)
1550                 this->WriteCommonExcept("%s","QUIT :Changing ident");
1551
1552         strlcpy(this->ident, newident, IDENTMAX+1);
1553
1554         this->InvalidateCache();
1555
1556         if (this->ServerInstance->Config->CycleHosts)
1557         {
1558                 for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1559                 {
1560                         i->first->WriteAllExceptSender(this, false, 0, "JOIN %s", i->first->name);
1561                         std::string n = this->ServerInstance->Modes->ModeString(this, i->first);
1562                         if (n.length() > 0)
1563                                 i->first->WriteAllExceptSender(this, true, 0, "MODE %s +%s", i->first->name, n.c_str());
1564                 }
1565         }
1566
1567         return true;
1568 }
1569
1570 void User::SendAll(const char* command, const char* text, ...)
1571 {
1572         char textbuffer[MAXBUF];
1573         char formatbuffer[MAXBUF];
1574         va_list argsPtr;
1575
1576         va_start(argsPtr, text);
1577         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1578         va_end(argsPtr);
1579
1580         snprintf(formatbuffer,MAXBUF,":%s %s $* :%s", this->GetFullHost(), command, textbuffer);
1581         std::string fmt = formatbuffer;
1582
1583         for (std::vector<User*>::const_iterator i = ServerInstance->Users->local_users.begin(); i != ServerInstance->Users->local_users.end(); i++)
1584         {
1585                 (*i)->Write(fmt);
1586         }
1587 }
1588
1589
1590 std::string User::ChannelList(User* source)
1591 {
1592         std::string list;
1593
1594         for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1595         {
1596                 /* If the target is the same as the sender, let them see all their channels.
1597                  * If the channel is NOT private/secret OR the user shares a common channel
1598                  * If the user is an oper, and the <options:operspywhois> option is set.
1599                  */
1600                 if ((source == this) || (IS_OPER(source) && ServerInstance->Config->OperSpyWhois) || (((!i->first->IsModeSet('p')) && (!i->first->IsModeSet('s'))) || (i->first->HasUser(source))))
1601                 {
1602                         list.append(i->first->GetPrefixChar(this)).append(i->first->name).append(" ");
1603                 }
1604         }
1605
1606         return list;
1607 }
1608
1609 void User::SplitChanList(User* dest, const std::string &cl)
1610 {
1611         std::string line;
1612         std::ostringstream prefix;
1613         std::string::size_type start, pos, length;
1614
1615         prefix << this->nick << " " << dest->nick << " :";
1616         line = prefix.str();
1617         int namelen = strlen(ServerInstance->Config->ServerName) + 6;
1618
1619         for (start = 0; (pos = cl.find(' ', start)) != std::string::npos; start = pos+1)
1620         {
1621                 length = (pos == std::string::npos) ? cl.length() : pos;
1622
1623                 if (line.length() + namelen + length - start > 510)
1624                 {
1625                         ServerInstance->SendWhoisLine(this, dest, 319, "%s", line.c_str());
1626                         line = prefix.str();
1627                 }
1628
1629                 if(pos == std::string::npos)
1630                 {
1631                         line.append(cl.substr(start, length - start));
1632                         break;
1633                 }
1634                 else
1635                 {
1636                         line.append(cl.substr(start, length - start + 1));
1637                 }
1638         }
1639
1640         if (line.length())
1641         {
1642                 ServerInstance->SendWhoisLine(this, dest, 319, "%s", line.c_str());
1643         }
1644 }
1645
1646 unsigned int User::GetMaxChans()
1647 {
1648         return this->MaxChans;
1649 }
1650
1651
1652 /*
1653  * Sets a user's connection class.
1654  * If the class name is provided, it will be used. Otherwise, the class will be guessed using host/ip/ident/etc.
1655  * NOTE: If the <ALLOW> or <DENY> tag specifies an ip, and this user resolves,
1656  * then their ip will be taken as 'priority' anyway, so for example,
1657  * <connect allow="127.0.0.1"> will match joe!bloggs@localhost
1658  */
1659 ConnectClass* User::SetClass(const std::string &explicit_name)
1660 {
1661         ConnectClass *found = NULL;
1662
1663         if (!IS_LOCAL(this))
1664                 return NULL;
1665
1666         if (!explicit_name.empty())
1667         {
1668                 for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++)
1669                 {
1670                         ConnectClass* c = *i;
1671
1672                         if (explicit_name == c->GetName() && !c->GetDisabled())
1673                         {
1674                                 found = c;
1675                         }
1676                 }
1677         }
1678         else
1679         {
1680                 for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++)
1681                 {
1682                         ConnectClass* c = *i;
1683
1684                         if (((match(this->GetIPString(),c->GetHost().c_str(),true)) || (match(this->host,c->GetHost().c_str()))))
1685                         {
1686                                 if (c->GetPort())
1687                                 {
1688                                         if (this->GetPort() == c->GetPort() && !c->GetDisabled())
1689                                         {
1690                                                 found = c;
1691                                         }
1692                                         else
1693                                                 continue;
1694                                 }
1695                                 else
1696                                 {
1697                                         if (!c->GetDisabled())
1698                                                 found = c;
1699                                 }
1700                         }
1701                 }
1702         }
1703
1704         /* ensure we don't fuck things up refcount wise, only remove them from a class if we find a new one :P */
1705         if (found)
1706         {
1707                 /* deny change if change will take class over the limit */
1708                 if (found->limit && (found->RefCount + 1 >= found->limit))
1709                 {
1710                         ServerInstance->Logs->Log("USERS", DEBUG, "OOPS: Connect class limit (%lu) hit, denying", found->limit);
1711                         return this->MyClass;
1712                 }
1713
1714                 /* should always be valid, but just in case .. */
1715                 if (this->MyClass)
1716                 {
1717                         if (found == this->MyClass) // no point changing this shit :P
1718                                 return this->MyClass;
1719                         this->MyClass->RefCount--;
1720                         ServerInstance->Logs->Log("USERS", DEBUG, "Untying user from connect class -- refcount: %lu", this->MyClass->RefCount);
1721                 }
1722
1723                 this->MyClass = found;
1724                 this->MyClass->RefCount++;
1725                 ServerInstance->Logs->Log("USERS", DEBUG, "User tied to new class -- connect refcount now: %lu", this->MyClass->RefCount);
1726         }
1727
1728         return this->MyClass;
1729 }
1730
1731 /* looks up a users password for their connection class (<ALLOW>/<DENY> tags)
1732  * NOTE: If the <ALLOW> or <DENY> tag specifies an ip, and this user resolves,
1733  * then their ip will be taken as 'priority' anyway, so for example,
1734  * <connect allow="127.0.0.1"> will match joe!bloggs@localhost
1735  */
1736 ConnectClass* User::GetClass()
1737 {
1738         return this->MyClass;
1739 }
1740
1741 void User::PurgeEmptyChannels()
1742 {
1743         std::vector<Channel*> to_delete;
1744
1745         // firstly decrement the count on each channel
1746         for (UCListIter f = this->chans.begin(); f != this->chans.end(); f++)
1747         {
1748                 f->first->RemoveAllPrefixes(this);
1749                 if (f->first->DelUser(this) == 0)
1750                 {
1751                         /* No users left in here, mark it for deletion */
1752                         try
1753                         {
1754                                 to_delete.push_back(f->first);
1755                         }
1756                         catch (...)
1757                         {
1758                                 ServerInstance->Logs->Log("USERS", DEBUG,"Exception in User::PurgeEmptyChannels to_delete.push_back()");
1759                         }
1760                 }
1761         }
1762
1763         for (std::vector<Channel*>::iterator n = to_delete.begin(); n != to_delete.end(); n++)
1764         {
1765                 Channel* thischan = *n;
1766                 chan_hash::iterator i2 = ServerInstance->chanlist->find(thischan->name);
1767                 if (i2 != ServerInstance->chanlist->end())
1768                 {
1769                         FOREACH_MOD(I_OnChannelDelete,OnChannelDelete(i2->second));
1770                         delete i2->second;
1771                         ServerInstance->chanlist->erase(i2);
1772                         this->chans.erase(*n);
1773                 }
1774         }
1775
1776         this->UnOper();
1777 }
1778
1779 void User::ShowMOTD()
1780 {
1781         if (!ServerInstance->Config->MOTD.size())
1782         {
1783                 this->WriteNumeric(422, "%s :Message of the day file is missing.",this->nick);
1784                 return;
1785         }
1786         this->WriteNumeric(375, "%s :%s message of the day", this->nick, ServerInstance->Config->ServerName);
1787
1788         for (file_cache::iterator i = ServerInstance->Config->MOTD.begin(); i != ServerInstance->Config->MOTD.end(); i++)
1789                 this->WriteNumeric(372, "%s :- %s",this->nick,i->c_str());
1790
1791         this->WriteNumeric(376, "%s :End of message of the day.", this->nick);
1792 }
1793
1794 void User::ShowRULES()
1795 {
1796         if (!ServerInstance->Config->RULES.size())
1797         {
1798                 this->WriteNumeric(434, "%s :RULES File is missing",this->nick);
1799                 return;
1800         }
1801
1802         this->WriteNumeric(308, "%s :- %s Server Rules -",this->nick,ServerInstance->Config->ServerName);
1803
1804         for (file_cache::iterator i = ServerInstance->Config->RULES.begin(); i != ServerInstance->Config->RULES.end(); i++)
1805                 this->WriteNumeric(232, "%s :- %s",this->nick,i->c_str());
1806
1807         this->WriteNumeric(309, "%s :End of RULES command.",this->nick);
1808 }
1809
1810 void User::HandleEvent(EventType et, int errornum)
1811 {
1812         if (this->quitting) // drop everything, user is due to be quit
1813                 return;
1814
1815         /* WARNING: May delete this user! */
1816         int thisfd = this->GetFd();
1817
1818         try
1819         {
1820                 switch (et)
1821                 {
1822                         case EVENT_READ:
1823                                 ServerInstance->ProcessUser(this);
1824                         break;
1825                         case EVENT_WRITE:
1826                                 this->FlushWriteBuf();
1827                         break;
1828                         case EVENT_ERROR:
1829                                 /** This should be safe, but dont DARE do anything after it -- Brain */
1830                                 this->SetWriteError(errornum ? strerror(errornum) : "EOF from client");
1831                         break;
1832                 }
1833         }
1834         catch (...)
1835         {
1836                 ServerInstance->Logs->Log("USERS", DEBUG,"Exception in User::HandleEvent intercepted");
1837         }
1838
1839         /* If the user has raised an error whilst being processed, quit them now we're safe to */
1840         if ((ServerInstance->SE->GetRef(thisfd) == this))
1841         {
1842                 if (!WriteError.empty())
1843                 {
1844                         ServerInstance->Users->QuitUser(this, GetWriteError());
1845                 }
1846         }
1847 }
1848
1849 void User::SetOperQuit(const std::string &oquit)
1850 {
1851         operquitmsg = oquit;
1852 }
1853
1854 const char* User::GetOperQuit()
1855 {
1856         return operquitmsg.c_str();
1857 }
1858
1859 void User::IncreasePenalty(int increase)
1860 {
1861         this->Penalty += increase;
1862 }
1863
1864 void User::DecreasePenalty(int decrease)
1865 {
1866         this->Penalty -= decrease;
1867 }
1868
1869 VisData::VisData()
1870 {
1871 }
1872
1873 VisData::~VisData()
1874 {
1875 }
1876
1877 bool VisData::VisibleTo(User* user)
1878 {
1879         return true;
1880 }
1881