src/users.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2007 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[MAX_DESCRIPTORS] = {0};
  25
  26 /* XXX: Used for speeding up WriteCommon operations */
  27 unsigned long uniq_id = 0;
  28
  29 std::string User::ProcessNoticeMasks(const char *sm)
  30 {
  31         bool adding = true, oldadding = false;
  32         const char *c = sm;
  33         std::string output;
  34
  35         while (c && *c)
  36         {
  37                 switch (*c)
  38                 {
  39                         case '+':
  40                                 adding = true;
  41                         break;
  42                         case '-':
  43                                 adding = false;
  44                         break;
  45                         case '*':
  46                                 for (unsigned char d = 'A'; d <= 'z'; d++)
  47                                 {
  48                                         if (ServerInstance->SNO->IsEnabled(d))
  49                                         {
  50                                                 if ((!IsNoticeMaskSet(d) && adding) || (IsNoticeMaskSet(d) && !adding))
  51                                                 {
  52                                                         if ((oldadding != adding) || (!output.length()))
  53                                                                 output += (adding ? '+' : '-');
  54
  55                                                         this->SetNoticeMask(d, adding);
  56
  57                                                         output += d;
  58                                                 }
  59                                         }
  60                                         oldadding = adding;
  61                                 }
  62                         break;
  63                         default:
  64                                 if ((*c >= 'A') && (*c <= 'z') && (ServerInstance->SNO->IsEnabled(*c)))
  65                                 {
  66                                         if ((!IsNoticeMaskSet(*c) && adding) || (IsNoticeMaskSet(*c) && !adding))
  67                                         {
  68                                                 if ((oldadding != adding) || (!output.length()))
  69                                                         output += (adding ? '+' : '-');
  70
  71                                                 this->SetNoticeMask(*c, adding);
  72
  73                                                 output += *c;
  74                                         }
  75                                 }
  76                                 oldadding = adding;
  77                         break;
  78                 }
  79
  80                 *c++;
  81         }
  82
  83         return output;
  84 }
  85
  86 void User::StartDNSLookup()
  87 {
  88         try
  89         {
  90                 bool cached;
  91                 const char* ip = this->GetIPString();
  92
  93                 /* Special case for 4in6 (Have i mentioned i HATE 4in6?) */
  94                 if (!strncmp(ip, "0::ffff:", 8))
  95                         res_reverse = new UserResolver(this->ServerInstance, this, ip + 8, DNS_QUERY_PTR4, cached);
  96                 else
  97                         res_reverse = new UserResolver(this->ServerInstance, this, ip, this->GetProtocolFamily() == AF_INET ? DNS_QUERY_PTR4 : DNS_QUERY_PTR6, cached);
  98
  99                 this->ServerInstance->AddResolver(res_reverse, cached);
 100         }
 101         catch (CoreException& e)
 102         {
 103                 ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
 104         }
 105 }
 106
 107 bool User::IsNoticeMaskSet(unsigned char sm)
 108 {
 109         return (snomasks[sm-65]);
 110 }
 111
 112 void User::SetNoticeMask(unsigned char sm, bool value)
 113 {
 114         snomasks[sm-65] = value;
 115 }
 116
 117 const char* User::FormatNoticeMasks()
 118 {
 119         static char data[MAXBUF];
 120         int offset = 0;
 121
 122         for (int n = 0; n < 64; n++)
 123         {
 124                 if (snomasks[n])
 125                         data[offset++] = n+65;
 126         }
 127
 128         data[offset] = 0;
 129         return data;
 130 }
 131
 132
 133
 134 bool User::IsModeSet(unsigned char m)
 135 {
 136         return (modes[m-65]);
 137 }
 138
 139 void User::SetMode(unsigned char m, bool value)
 140 {
 141         modes[m-65] = value;
 142 }
 143
 144 const char* User::FormatModes()
 145 {
 146         static char data[MAXBUF];
 147         int offset = 0;
 148         for (int n = 0; n < 64; n++)
 149         {
 150                 if (modes[n])
 151                         data[offset++] = n+65;
 152         }
 153         data[offset] = 0;
 154         return data;
 155 }
 156
 157 void User::DecrementModes()
 158 {
 159         ServerInstance->Log(DEBUG,"DecrementModes()");
 160         for (unsigned char n = 'A'; n <= 'z'; n++)
 161         {
 162                 if (modes[n-65])
 163                 {
 164                         ServerInstance->Log(DEBUG,"DecrementModes() found mode %c", n);
 165                         ModeHandler* mh = ServerInstance->Modes->FindMode(n, MODETYPE_USER);
 166                         if (mh)
 167                         {
 168                                 ServerInstance->Log(DEBUG,"Found handler %c and call ChangeCount", n);
 169                                 mh->ChangeCount(-1);
 170                         }
 171                 }
 172         }
 173 }
 174
 175 User::User(InspIRCd* Instance, const std::string &uid) : ServerInstance(Instance)
 176 {
 177         *password = *nick = *ident = *host = *dhost = *fullname = *awaymsg = *oper = *uuid = 0;
 178         server = (char*)Instance->FindServerNamePtr(Instance->Config->ServerName);
 179         reset_due = ServerInstance->Time();
 180         age = ServerInstance->Time(true);
 181         Penalty = 0;
 182         lines_in = lastping = signon = idle_lastmsg = nping = registered = 0;
 183         ChannelCount = timeout = bytes_in = bytes_out = cmds_in = cmds_out = 0;
 184         OverPenalty = ExemptFromPenalty = muted = exempt = haspassed = dns_done = false;
 185         fd = -1;
 186         recvq.clear();
 187         sendq.clear();
 188         WriteError.clear();
 189         res_forward = res_reverse = NULL;
 190         Visibility = NULL;
 191         ip = NULL;
 192         MyClass = NULL;
 193         chans.clear();
 194         invites.clear();
 195         memset(modes,0,sizeof(modes));
 196         memset(snomasks,0,sizeof(snomasks));
 197         /* Invalidate cache */
 198         operquit = cached_fullhost = cached_hostip = cached_makehost = cached_fullrealhost = NULL;
 199
 200         if (uid.empty())
 201                 strlcpy(uuid, Instance->GetUID().c_str(), UUID_LENGTH);
 202         else
 203                 strlcpy(uuid, uid.c_str(), UUID_LENGTH);
 204
 205         ServerInstance->Log(DEBUG,"New UUID for user: %s (%s)", uuid, uid.empty() ? "allocated new" : "used remote");
 206
 207         user_hash::iterator finduuid = Instance->uuidlist->find(uuid);
 208         if (finduuid == Instance->uuidlist->end())
 209                 (*Instance->uuidlist)[uuid] = this;
 210         else
 211                 throw CoreException("Duplicate UUID "+std::string(uuid)+" in User constructor");
 212 }
 213
 214 void User::RemoveCloneCounts()
 215 {
 216         clonemap::iterator x = ServerInstance->local_clones.find(this->GetIPString());
 217         if (x != ServerInstance->local_clones.end())
 218         {
 219                 x->second--;
 220                 if (!x->second)
 221                 {
 222                         ServerInstance->local_clones.erase(x);
 223                 }
 224         }
 225
 226         clonemap::iterator y = ServerInstance->global_clones.find(this->GetIPString());
 227         if (y != ServerInstance->global_clones.end())
 228         {
 229                 y->second--;
 230                 if (!y->second)
 231                 {
 232                         ServerInstance->global_clones.erase(y);
 233                 }
 234         }
 235 }
 236
 237 User::~User()
 238 {
 239         /* NULL for remote users :) */
 240         if (this->MyClass)
 241         {
 242                 this->MyClass->RefCount--;
 243                 ServerInstance->Log(DEBUG, "User destructor -- connect refcount now: %u", this->MyClass->RefCount);
 244         }
 245
 246         this->InvalidateCache();
 247         this->DecrementModes();
 248         if (operquit)
 249                 free(operquit);
 250         if (ip)
 251         {
 252                 this->RemoveCloneCounts();
 253
 254                 if (this->GetProtocolFamily() == AF_INET)
 255                 {
 256                         delete (sockaddr_in*)ip;
 257                 }
 258 #ifdef SUPPORT_IP6LINKS
 259                 else
 260                 {
 261                         delete (sockaddr_in6*)ip;
 262                 }
 263 #endif
 264         }
 265
 266         ServerInstance->uuidlist->erase(uuid);
 267 }
 268
 269 char* User::MakeHost()
 270 {
 271         if (this->cached_makehost)
 272                 return this->cached_makehost;
 273
 274         char nhost[MAXBUF];
 275         /* This is much faster than snprintf */
 276         char* t = nhost;
 277         for(char* n = ident; *n; n++)
 278                 *t++ = *n;
 279         *t++ = '@';
 280         for(char* n = host; *n; n++)
 281                 *t++ = *n;
 282         *t = 0;
 283
 284         this->cached_makehost = strdup(nhost);
 285
 286         return this->cached_makehost;
 287 }
 288
 289 char* User::MakeHostIP()
 290 {
 291         if (this->cached_hostip)
 292                 return this->cached_hostip;
 293
 294         char ihost[MAXBUF];
 295         /* This is much faster than snprintf */
 296         char* t = ihost;
 297         for(char* n = ident; *n; n++)
 298                 *t++ = *n;
 299         *t++ = '@';
 300         for(const char* n = this->GetIPString(); *n; n++)
 301                 *t++ = *n;
 302         *t = 0;
 303
 304         this->cached_hostip = strdup(ihost);
 305
 306         return this->cached_hostip;
 307 }
 308
 309 void User::CloseSocket()
 310 {
 311         ServerInstance->SE->Shutdown(this, 2);
 312         ServerInstance->SE->Close(this);
 313 }
 314
 315 char* User::GetFullHost()
 316 {
 317         if (this->cached_fullhost)
 318                 return this->cached_fullhost;
 319
 320         char result[MAXBUF];
 321         char* t = result;
 322         for(char* n = nick; *n; n++)
 323                 *t++ = *n;
 324         *t++ = '!';
 325         for(char* n = ident; *n; n++)
 326                 *t++ = *n;
 327         *t++ = '@';
 328         for(char* n = dhost; *n; n++)
 329                 *t++ = *n;
 330         *t = 0;
 331
 332         this->cached_fullhost = strdup(result);
 333
 334         return this->cached_fullhost;
 335 }
 336
 337 char* User::MakeWildHost()
 338 {
 339         static char nresult[MAXBUF];
 340         char* t = nresult;
 341         *t++ = '*';     *t++ = '!';
 342         *t++ = '*';     *t++ = '@';
 343         for(char* n = dhost; *n; n++)
 344                 *t++ = *n;
 345         *t = 0;
 346         return nresult;
 347 }
 348
 349 int User::ReadData(void* buffer, size_t size)
 350 {
 351         if (IS_LOCAL(this))
 352         {
 353 #ifndef WIN32
 354                 return read(this->fd, buffer, size);
 355 #else
 356                 return recv(this->fd, (char*)buffer, size, 0);
 357 #endif
 358         }
 359         else
 360                 return 0;
 361 }
 362
 363
 364 char* User::GetFullRealHost()
 365 {
 366         if (this->cached_fullrealhost)
 367                 return this->cached_fullrealhost;
 368
 369         char fresult[MAXBUF];
 370         char* t = fresult;
 371         for(char* n = nick; *n; n++)
 372                 *t++ = *n;
 373         *t++ = '!';
 374         for(char* n = ident; *n; n++)
 375                 *t++ = *n;
 376         *t++ = '@';
 377         for(char* n = host; *n; n++)
 378                 *t++ = *n;
 379         *t = 0;
 380
 381         this->cached_fullrealhost = strdup(fresult);
 382
 383         return this->cached_fullrealhost;
 384 }
 385
 386 bool User::IsInvited(const irc::string &channel)
 387 {
 388         for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
 389         {
 390                 if (channel == *i)
 391                 {
 392                         return true;
 393                 }
 394         }
 395         return false;
 396 }
 397
 398 InvitedList* User::GetInviteList()
 399 {
 400         return &invites;
 401 }
 402
 403 void User::InviteTo(const irc::string &channel)
 404 {
 405         invites.push_back(channel);
 406 }
 407
 408 void User::RemoveInvite(const irc::string &channel)
 409 {
 410         for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
 411         {
 412                 if (channel == *i)
 413                 {
 414                         invites.erase(i);
 415                         return;
 416                 }
 417         }
 418 }
 419
 420 bool User::HasPermission(const std::string &command)
 421 {
 422         char* mycmd;
 423         char* savept;
 424         char* savept2;
 425
 426         /*
 427          * users on remote servers can completely bypass all permissions based checks.
 428          * This prevents desyncs when one server has different type/class tags to another.
 429          * That having been said, this does open things up to the possibility of source changes
 430          * allowing remote kills, etc - but if they have access to the src, they most likely have
 431          * access to the conf - so it's an end to a means either way.
 432          */
 433         if (!IS_LOCAL(this))
 434                 return true;
 435
 436         // are they even an oper at all?
 437         if (!IS_OPER(this))
 438         {
 439                 return false;
 440         }
 441
 442         // check their opertype exists (!). This won't affect local users, of course.
 443         opertype_t::iterator iter_opertype = ServerInstance->Config->opertypes.find(this->oper);
 444         if (iter_opertype == ServerInstance->Config->opertypes.end())
 445         {
 446                 return false;
 447         }
 448
 449         /* XXX all this strtok/strdup stuff is a bit ick and horrid -- w00t */
 450         char* Classes = strdup(iter_opertype->second);
 451         char* myclass = strtok_r(Classes," ",&savept);
 452         while (myclass)
 453         {
 454                 operclass_t::iterator iter_operclass = ServerInstance->Config->operclass.find(myclass);
 455                 if (iter_operclass != ServerInstance->Config->operclass.end())
 456                 {
 457                         char* CommandList = strdup(iter_operclass->second);
 458                         mycmd = strtok_r(CommandList," ",&savept2);
 459                         while (mycmd)
 460                         {
 461                                 if ((!strcasecmp(mycmd,command.c_str())) || (*mycmd == '*'))
 462                                 {
 463                                         free(Classes);
 464                                         free(CommandList);
 465                                         return true;
 466                                 }
 467                                 mycmd = strtok_r(NULL," ",&savept2);
 468                         }
 469                         free(CommandList);
 470                 }
 471                 myclass = strtok_r(NULL," ",&savept);
 472         }
 473         free(Classes);
 474
 475         return false;
 476 }
 477
 478 /** NOTE: We cannot pass a const reference to this method.
 479  * The string is changed by the workings of the method,
 480  * so that if we pass const ref, we end up copying it to
 481  * something we can change anyway. Makes sense to just let
 482  * the compiler do that copy for us.
 483  */
 484 bool User::AddBuffer(std::string a)
 485 {
 486         try
 487         {
 488                 std::string::size_type i = a.rfind('\r');
 489
 490                 while (i != std::string::npos)
 491                 {
 492                         a.erase(i, 1);
 493                         i = a.rfind('\r');
 494                 }
 495
 496                 if (a.length())
 497                         recvq.append(a);
 498
 499                 if (this->MyClass && (recvq.length() > this->MyClass->GetRecvqMax()))
 500                 {
 501                         this->SetWriteError("RecvQ exceeded");
 502                         ServerInstance->WriteOpers("*** User %s RecvQ of %d exceeds connect class maximum of %d",this->nick,recvq.length(),this->MyClass->GetRecvqMax());
 503                         return false;
 504                 }
 505
 506                 return true;
 507         }
 508
 509         catch (...)
 510         {
 511                 ServerInstance->Log(DEBUG,"Exception in User::AddBuffer()");
 512                 return false;
 513         }
 514 }
 515
 516 bool User::BufferIsReady()
 517 {
 518         return (recvq.find('\n') != std::string::npos);
 519 }
 520
 521 void User::ClearBuffer()
 522 {
 523         recvq.clear();
 524 }
 525
 526 std::string User::GetBuffer()
 527 {
 528         try
 529         {
 530                 if (recvq.empty())
 531                         return "";
 532
 533                 /* Strip any leading \r or \n off the string.
 534                  * Usually there are only one or two of these,
 535                  * so its is computationally cheap to do.
 536                  */
 537                 std::string::iterator t = recvq.begin();
 538                 while (t != recvq.end() && (*t == '\r' || *t == '\n'))
 539                 {
 540                         recvq.erase(t);
 541                         t = recvq.begin();
 542                 }
 543
 544                 for (std::string::iterator x = recvq.begin(); x != recvq.end(); x++)
 545                 {
 546                         /* Find the first complete line, return it as the
 547                          * result, and leave the recvq as whats left
 548                          */
 549                         if (*x == '\n')
 550                         {
 551                                 std::string ret = std::string(recvq.begin(), x);
 552                                 recvq.erase(recvq.begin(), x + 1);
 553                                 return ret;
 554                         }
 555                 }
 556                 return "";
 557         }
 558
 559         catch (...)
 560         {
 561                 ServerInstance->Log(DEBUG,"Exception in User::GetBuffer()");
 562                 return "";
 563         }
 564 }
 565
 566 void User::AddWriteBuf(const std::string &data)
 567 {
 568         if (*this->GetWriteError())
 569                 return;
 570
 571         if (this->MyClass && (sendq.length() + data.length() > this->MyClass->GetSendqMax()))
 572         {
 573                 /*
 574                  * Fix by brain - Set the error text BEFORE calling writeopers, because
 575                  * if we dont it'll recursively  call here over and over again trying
 576                  * to repeatedly add the text to the sendq!
 577                  */
 578                 this->SetWriteError("SendQ exceeded");
 579                 ServerInstance->WriteOpers("*** User %s SendQ of %d exceeds connect class maximum of %d",this->nick,sendq.length() + data.length(),this->MyClass->GetSendqMax());
 580                 return;
 581         }
 582
 583         try
 584         {
 585                 if (data.length() > MAXBUF - 2) /* MAXBUF has a value of 514, to account for line terminators */
 586                         sendq.append(data.substr(0,MAXBUF - 4)).append("\r\n"); /* MAXBUF-4 = 510 */
 587                 else
 588                         sendq.append(data);
 589         }
 590         catch (...)
 591         {
 592                 this->SetWriteError("SendQ exceeded");
 593                 ServerInstance->WriteOpers("*** User %s SendQ got an exception",this->nick);
 594         }
 595 }
 596
 597 // send AS MUCH OF THE USERS SENDQ as we are able to (might not be all of it)
 598 void User::FlushWriteBuf()
 599 {
 600         try
 601         {
 602                 if ((this->fd == FD_MAGIC_NUMBER) || (*this->GetWriteError()))
 603                 {
 604                         sendq.clear();
 605                 }
 606                 if ((sendq.length()) && (this->fd != FD_MAGIC_NUMBER))
 607                 {
 608                         int old_sendq_length = sendq.length();
 609                         int n_sent = ServerInstance->SE->Send(this, this->sendq.data(), this->sendq.length(), 0);
 610
 611                         if (n_sent == -1)
 612                         {
 613                                 if (errno == EAGAIN)
 614                                 {
 615                                         /* The socket buffer is full. This isnt fatal,
 616                                          * try again later.
 617                                          */
 618                                         this->ServerInstance->SE->WantWrite(this);
 619                                 }
 620                                 else
 621                                 {
 622                                         /* Fatal error, set write error and bail
 623                                          */
 624                                         this->SetWriteError(errno ? strerror(errno) : "EOF from client");
 625                                         return;
 626                                 }
 627                         }
 628                         else
 629                         {
 630                                 /* advance the queue */
 631                                 if (n_sent)
 632                                         this->sendq = this->sendq.substr(n_sent);
 633                                 /* update the user's stats counters */
 634                                 this->bytes_out += n_sent;
 635                                 this->cmds_out++;
 636                                 if (n_sent != old_sendq_length)
 637                                         this->ServerInstance->SE->WantWrite(this);
 638                         }
 639                 }
 640         }
 641
 642         catch (...)
 643         {
 644                 ServerInstance->Log(DEBUG,"Exception in User::FlushWriteBuf()");
 645         }
 646
 647         if (this->sendq.empty())
 648         {
 649                 FOREACH_MOD(I_OnBufferFlushed,OnBufferFlushed(this));
 650         }
 651 }
 652
 653 void User::SetWriteError(const std::string &error)
 654 {
 655         try
 656         {
 657                 // don't try to set the error twice, its already set take the first string.
 658                 if (this->WriteError.empty())
 659                         this->WriteError = error;
 660         }
 661
 662         catch (...)
 663         {
 664                 ServerInstance->Log(DEBUG,"Exception in User::SetWriteError()");
 665         }
 666 }
 667
 668 const char* User::GetWriteError()
 669 {
 670         return this->WriteError.c_str();
 671 }
 672
 673 void User::Oper(const std::string &opertype)
 674 {
 675         try
 676         {
 677                 this->modes[UM_OPERATOR] = 1;
 678                 this->WriteServ("MODE %s :+o", this->nick);
 679                 FOREACH_MOD(I_OnOper, OnOper(this, opertype));
 680                 ServerInstance->Log(DEFAULT,"OPER: %s!%s@%s opered as type: %s", this->nick, this->ident, this->host, opertype.c_str());
 681                 strlcpy(this->oper, opertype.c_str(), NICKMAX - 1);
 682                 ServerInstance->all_opers.push_back(this);
 683                 FOREACH_MOD(I_OnPostOper,OnPostOper(this, opertype));
 684         }
 685
 686         catch (...)
 687         {
 688                 ServerInstance->Log(DEBUG,"Exception in User::Oper()");
 689         }
 690 }
 691
 692 void User::UnOper()
 693 {
 694         try
 695         {
 696                 if (IS_OPER(this))
 697                 {
 698                         // unset their oper type (what IS_OPER checks), and remove +o
 699                         *this->oper = 0;
 700                         this->modes[UM_OPERATOR] = 0;
 701
 702                         // remove the user from the oper list. Will remove multiple entries as a safeguard against bug #404
 703                         ServerInstance->all_opers.remove(this);
 704                 }
 705         }
 706
 707         catch (...)
 708         {
 709                 ServerInstance->Log(DEBUG,"Exception in User::UnOper()");
 710         }
 711 }
 712
 713 void User::QuitUser(InspIRCd* Instance, User *user, const std::string &quitreason, const char* operreason)
 714 {
 715         Instance->Log(DEBUG,"QuitUser: %s '%s'", user->nick, quitreason.c_str());
 716         user->Write("ERROR :Closing link (%s@%s) [%s]", user->ident, user->host, *operreason ? operreason : quitreason.c_str());
 717         user->muted = true;
 718         Instance->GlobalCulls.AddItem(user, quitreason.c_str(), operreason);
 719 }
 720
 721 /* adds or updates an entry in the whowas list */
 722 void User::AddToWhoWas()
 723 {
 724         Command* whowas_command = ServerInstance->Parser->GetHandler("WHOWAS");
 725         if (whowas_command)
 726         {
 727                 std::deque<classbase*> params;
 728                 params.push_back(this);
 729                 whowas_command->HandleInternal(WHOWAS_ADD, params);
 730         }
 731 }
 732
 733 /* add a client connection to the sockets list */
 734 void User::AddClient(InspIRCd* Instance, int socket, int port, bool iscached, int socketfamily, sockaddr* ip)
 735 {
 736         /* NOTE: Calling this one parameter constructor for User automatically
 737          * allocates a new UUID and places it in the hash_map.
 738          */
 739         User* New = NULL;
 740         try
 741         {
 742                 New = new User(Instance);
 743         }
 744         catch (...)
 745         {
 746                 Instance->Log(DEFAULT,"*** WTF *** Duplicated UUID! -- Crack smoking monkies have been unleashed.");
 747                 Instance->WriteOpers("*** WARNING *** Duplicate UUID allocated!");
 748                 return;
 749         }
 750
 751         Instance->Log(DEBUG,"New user fd: %d", socket);
 752
 753         int j = 0;
 754
 755         Instance->unregistered_count++;
 756
 757         char ipaddr[MAXBUF];
 758 #ifdef IPV6
 759         if (socketfamily == AF_INET6)
 760                 inet_ntop(AF_INET6, &((const sockaddr_in6*)ip)->sin6_addr, ipaddr, sizeof(ipaddr));
 761         else
 762 #endif
 763         inet_ntop(AF_INET, &((const sockaddr_in*)ip)->sin_addr, ipaddr, sizeof(ipaddr));
 764
 765         (*(Instance->clientlist))[New->uuid] = New;
 766         New->SetFd(socket);
 767
 768         /* The users default nick is their UUID */
 769         strlcpy(New->nick, New->uuid, NICKMAX - 1);
 770
 771         New->server = Instance->FindServerNamePtr(Instance->Config->ServerName);
 772         /* We don't need range checking here, we KNOW 'unknown\0' will fit into the ident field. */
 773         strcpy(New->ident, "unknown");
 774
 775         New->registered = REG_NONE;
 776         New->signon = Instance->Time() + Instance->Config->dns_timeout;
 777         New->lastping = 1;
 778
 779         New->SetSockAddr(socketfamily, ipaddr, port);
 780
 781         /* Smarter than your average bear^H^H^H^Hset of strlcpys. */
 782         for (const char* temp = New->GetIPString(); *temp && j < 64; temp++, j++)
 783                 New->dhost[j] = New->host[j] = *temp;
 784         New->dhost[j] = New->host[j] = 0;
 785
 786         Instance->AddLocalClone(New);
 787         Instance->AddGlobalClone(New);
 788
 789         /*
 790          * First class check. We do this again in FullConnect after DNS is done, and NICK/USER is recieved.
 791          * See my note down there for why this is required. DO NOT REMOVE. :) -- w00t
 792          */
 793         ConnectClass* i = New->SetClass();
 794
 795         if (!i)
 796         {
 797                 User::QuitUser(Instance, New, "Access denied by configuration");
 798                 return;
 799         }
 800
 801         /*
 802          * Check connect class settings and initialise settings into User.
 803          * This will be done again after DNS resolution. -- w00t
 804          */
 805         New->CheckClass();
 806
 807         Instance->local_users.push_back(New);
 808
 809         if ((Instance->local_users.size() > Instance->Config->SoftLimit) || (Instance->local_users.size() >= MAXCLIENTS))
 810         {
 811                 Instance->WriteOpers("*** Warning: softlimit value has been reached: %d clients", Instance->Config->SoftLimit);
 812                 User::QuitUser(Instance, New,"No more connections allowed");
 813                 return;
 814         }
 815
 816         /*
 817          * XXX -
 818          * this is done as a safety check to keep the file descriptors within range of fd_ref_table.
 819          * its a pretty big but for the moment valid assumption:
 820          * file descriptors are handed out starting at 0, and are recycled as theyre freed.
 821          * therefore if there is ever an fd over 65535, 65536 clients must be connected to the
 822          * irc server at once (or the irc server otherwise initiating this many connections, files etc)
 823          * which for the time being is a physical impossibility (even the largest networks dont have more
 824          * than about 10,000 users on ONE server!)
 825          */
 826 #ifndef WINDOWS
 827         if ((unsigned int)socket >= MAX_DESCRIPTORS)
 828         {
 829                 User::QuitUser(Instance, New, "Server is full");
 830                 return;
 831         }
 832 #endif
 833         /*
 834          * even with bancache, we still have to keep User::exempt current.
 835          * besides that, if we get a positive bancache hit, we still won't fuck
 836          * them over if they are exempt. -- w00t
 837          */
 838         New->exempt = (Instance->XLines->MatchesLine("E",New) != NULL);
 839
 840         if (BanCacheHit *b = Instance->BanCache->GetHit(New->GetIPString()))
 841         {
 842                 if (!b->Type.empty() && !New->exempt)
 843                 {
 844                         /* user banned */
 845                         Instance->Log(DEBUG, std::string("BanCache: Positive hit for ") + New->GetIPString());
 846                         if (*Instance->Config->MoronBanner)
 847                                 New->WriteServ("NOTICE %s :*** %s", New->nick, Instance->Config->MoronBanner);
 848                         User::QuitUser(Instance, New, b->Reason);
 849                         return;
 850                 }
 851                 else
 852                 {
 853                         Instance->Log(DEBUG, std::string("BanCache: Negative hit for ") + New->GetIPString());
 854                 }
 855         }
 856         else
 857         {
 858                 if (!New->exempt)
 859                 {
 860                         XLine* r = Instance->XLines->MatchesLine("Z",New);
 861
 862                         if (r)
 863                         {
 864                                 r->Apply(New);
 865                                 return;
 866                         }
 867                 }
 868         }
 869
 870         if (socket > -1)
 871         {
 872                 if (!Instance->SE->AddFd(New))
 873                 {
 874                         Instance->Log(DEBUG,"Internal error on new connection");
 875                         User::QuitUser(Instance, New, "Internal error handling connection");
 876                 }
 877         }
 878
 879         /* NOTE: even if dns lookups are *off*, we still need to display this.
 880          * BOPM and other stuff requires it.
 881          */
 882         New->WriteServ("NOTICE Auth :*** Looking up your hostname...");
 883
 884         if (Instance->Config->NoUserDns)
 885         {
 886                 New->dns_done = true;
 887         }
 888         else
 889         {
 890                 New->StartDNSLookup();
 891         }
 892 }
 893
 894 unsigned long User::GlobalCloneCount()
 895 {
 896         clonemap::iterator x = ServerInstance->global_clones.find(this->GetIPString());
 897         if (x != ServerInstance->global_clones.end())
 898                 return x->second;
 899         else
 900                 return 0;
 901 }
 902
 903 unsigned long User::LocalCloneCount()
 904 {
 905         clonemap::iterator x = ServerInstance->local_clones.find(this->GetIPString());
 906         if (x != ServerInstance->local_clones.end())
 907                 return x->second;
 908         else
 909                 return 0;
 910 }
 911
 912 /*
 913  * Check class restrictions
 914  */
 915 void User::CheckClass()
 916 {
 917         ConnectClass* a = this->MyClass;
 918
 919         if ((!a) || (a->GetType() == CC_DENY))
 920         {
 921                 User::QuitUser(ServerInstance, this, "Unauthorised connection");
 922                 return;
 923         }
 924         else if ((a->GetMaxLocal()) && (this->LocalCloneCount() > a->GetMaxLocal()))
 925         {
 926                 User::QuitUser(ServerInstance, this, "No more connections allowed from your host via this connect class (local)");
 927                 ServerInstance->WriteOpers("*** WARNING: maximum LOCAL connections (%ld) exceeded for IP %s", a->GetMaxLocal(), this->GetIPString());
 928                 return;
 929         }
 930         else if ((a->GetMaxGlobal()) && (this->GlobalCloneCount() > a->GetMaxGlobal()))
 931         {
 932                 User::QuitUser(ServerInstance, this, "No more connections allowed from your host via this connect class (global)");
 933                 ServerInstance->WriteOpers("*** WARNING: maximum GLOBAL connections (%ld) exceeded for IP %s", a->GetMaxGlobal(), this->GetIPString());
 934                 return;
 935         }
 936
 937         this->nping = ServerInstance->Time() + a->GetPingTime() + ServerInstance->Config->dns_timeout;
 938         this->timeout = ServerInstance->Time() + a->GetRegTimeout();
 939         this->MaxChans = a->GetMaxChans();
 940 }
 941
 942 void User::FullConnect()
 943 {
 944         ServerInstance->stats->statsConnects++;
 945         this->idle_lastmsg = ServerInstance->Time();
 946
 947         /*
 948          * You may be thinking "wtf, we checked this in User::AddClient!" - and yes, we did, BUT.
 949          * At the time AddClient is called, we don't have a resolved host, by here we probably do - which
 950          * may put the user into a totally seperate class with different restrictions! so we *must* check again.
 951          * Don't remove this! -- w00t
 952          */
 953         this->SetClass();
 954
 955         /* Check the password, if one is required by the user's connect class.
 956          * This CANNOT be in CheckClass(), because that is called prior to PASS as well!
 957          */
 958         if (this->MyClass && !this->MyClass->GetPass().empty() && !this->haspassed)
 959         {
 960                 User::QuitUser(ServerInstance, this, "Invalid password");
 961                 return;
 962         }
 963
 964         if (!this->exempt)
 965         {
 966                 GLine *r = (GLine *)ServerInstance->XLines->MatchesLine("G", this);
 967
 968                 if (r)
 969                 {
 970                         this->muted = true;
 971                         r->Apply(this);
 972                         return;
 973                 }
 974
 975                 KLine *n = (KLine *)ServerInstance->XLines->MatchesLine("K", this);
 976
 977                 if (n)
 978                 {
 979                         this->muted = true;
 980                         n->Apply(this);
 981                         return;
 982                 }
 983         }
 984
 985         this->WriteServ("NOTICE Auth :Welcome to \002%s\002!",ServerInstance->Config->Network);
 986         this->WriteServ("001 %s :Welcome to the %s IRC Network %s!%s@%s",this->nick, ServerInstance->Config->Network, this->nick, this->ident, this->host);
 987         this->WriteServ("002 %s :Your host is %s, running version %s",this->nick,ServerInstance->Config->ServerName,VERSION);
 988         this->WriteServ("003 %s :This server was created %s %s", this->nick, __TIME__, __DATE__);
 989         this->WriteServ("004 %s %s %s %s %s %s", this->nick, ServerInstance->Config->ServerName, VERSION, ServerInstance->Modes->UserModeList().c_str(), ServerInstance->Modes->ChannelModeList().c_str(), ServerInstance->Modes->ParaModeList().c_str());
 990
 991         ServerInstance->Config->Send005(this);
 992
 993         this->WriteServ("042 %s %s :your unique ID", this->nick, this->uuid);
 994
 995
 996         this->ShowMOTD();
 997
 998         /* Now registered */
 999         if (ServerInstance->unregistered_count)
1000                 ServerInstance->unregistered_count--;
1001
1002         /* Trigger LUSERS output, give modules a chance too */
1003         int MOD_RESULT = 0;
1004         FOREACH_RESULT(I_OnPreCommand, OnPreCommand("LUSERS", NULL, 0, this, true, "LUSERS"));
1005         if (!MOD_RESULT)
1006                 ServerInstance->CallCommandHandler("LUSERS", NULL, 0, this);
1007
1008         /*
1009          * We don't set REG_ALL until triggering OnUserConnect, so some module events don't spew out stuff
1010          * for a user that doesn't exist yet.
1011          */
1012         FOREACH_MOD(I_OnUserConnect,OnUserConnect(this));
1013
1014         this->registered = REG_ALL;
1015
1016         FOREACH_MOD(I_OnPostConnect,OnPostConnect(this));
1017
1018         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);
1019
1020         ServerInstance->Log(DEBUG, "BanCache: Adding NEGATIVE hit for %s", this->GetIPString());
1021         ServerInstance->BanCache->AddHit(this->GetIPString(), "", "");
1022 }
1023
1024 /** User::UpdateNick()
1025  * re-allocates a nick in the user_hash after they change nicknames,
1026  * returns a pointer to the new user as it may have moved
1027  */
1028 User* User::UpdateNickHash(const char* New)
1029 {
1030         try
1031         {
1032                 //user_hash::iterator newnick;
1033                 user_hash::iterator oldnick = ServerInstance->clientlist->find(this->nick);
1034
1035                 if (!strcasecmp(this->nick,New))
1036                         return oldnick->second;
1037
1038                 if (oldnick == ServerInstance->clientlist->end())
1039                         return NULL; /* doesnt exist */
1040
1041                 User* olduser = oldnick->second;
1042                 (*(ServerInstance->clientlist))[New] = olduser;
1043                 ServerInstance->clientlist->erase(oldnick);
1044                 return olduser;
1045         }
1046
1047         catch (...)
1048         {
1049                 ServerInstance->Log(DEBUG,"Exception in User::UpdateNickHash()");
1050                 return NULL;
1051         }
1052 }
1053
1054 void User::InvalidateCache()
1055 {
1056         /* Invalidate cache */
1057         if (cached_fullhost)
1058                 free(cached_fullhost);
1059         if (cached_hostip)
1060                 free(cached_hostip);
1061         if (cached_makehost)
1062                 free(cached_makehost);
1063         if (cached_fullrealhost)
1064                 free(cached_fullrealhost);
1065         cached_fullhost = cached_hostip = cached_makehost = cached_fullrealhost = NULL;
1066 }
1067
1068 bool User::ForceNickChange(const char* newnick)
1069 {
1070         try
1071         {
1072                 int MOD_RESULT = 0;
1073
1074                 this->InvalidateCache();
1075
1076                 FOREACH_RESULT(I_OnUserPreNick,OnUserPreNick(this, newnick));
1077
1078                 if (MOD_RESULT)
1079                 {
1080                         ServerInstance->stats->statsCollisions++;
1081                         return false;
1082                 }
1083
1084                 if (ServerInstance->XLines->MatchesLine("Q",newnick))
1085                 {
1086                         ServerInstance->stats->statsCollisions++;
1087                         return false;
1088                 }
1089
1090                 if (this->registered == REG_ALL)
1091                 {
1092                         std::deque<classbase*> dummy;
1093                         Command* nickhandler = ServerInstance->Parser->GetHandler("NICK");
1094                         if (nickhandler)
1095                         {
1096                                 nickhandler->HandleInternal(1, dummy);
1097                                 bool result = (ServerInstance->Parser->CallHandler("NICK", &newnick, 1, this) == CMD_SUCCESS);
1098                                 nickhandler->HandleInternal(0, dummy);
1099                                 return result;
1100                         }
1101                 }
1102                 return false;
1103         }
1104
1105         catch (...)
1106         {
1107                 ServerInstance->Log(DEBUG,"Exception in User::ForceNickChange()");
1108                 return false;
1109         }
1110 }
1111
1112 void User::SetSockAddr(int protocol_family, const char* ip, int port)
1113 {
1114         switch (protocol_family)
1115         {
1116 #ifdef SUPPORT_IP6LINKS
1117                 case AF_INET6:
1118                 {
1119                         sockaddr_in6* sin = new sockaddr_in6;
1120                         sin->sin6_family = AF_INET6;
1121                         sin->sin6_port = port;
1122                         inet_pton(AF_INET6, ip, &sin->sin6_addr);
1123                         this->ip = (sockaddr*)sin;
1124                 }
1125                 break;
1126 #endif
1127                 case AF_INET:
1128                 {
1129                         sockaddr_in* sin = new sockaddr_in;
1130                         sin->sin_family = AF_INET;
1131                         sin->sin_port = port;
1132                         inet_pton(AF_INET, ip, &sin->sin_addr);
1133                         this->ip = (sockaddr*)sin;
1134                 }
1135                 break;
1136                 default:
1137                         ServerInstance->Log(DEBUG,"Uh oh, I dont know protocol %d to be set on '%s'!", protocol_family, this->nick);
1138                 break;
1139         }
1140 }
1141
1142 int User::GetPort()
1143 {
1144         if (this->ip == NULL)
1145                 return 0;
1146
1147         switch (this->GetProtocolFamily())
1148         {
1149 #ifdef SUPPORT_IP6LINKS
1150                 case AF_INET6:
1151                 {
1152                         sockaddr_in6* sin = (sockaddr_in6*)this->ip;
1153                         return sin->sin6_port;
1154                 }
1155                 break;
1156 #endif
1157                 case AF_INET:
1158                 {
1159                         sockaddr_in* sin = (sockaddr_in*)this->ip;
1160                         return sin->sin_port;
1161                 }
1162                 break;
1163                 default:
1164                 break;
1165         }
1166         return 0;
1167 }
1168
1169 int User::GetProtocolFamily()
1170 {
1171         if (this->ip == NULL)
1172                 return 0;
1173
1174         sockaddr_in* sin = (sockaddr_in*)this->ip;
1175         return sin->sin_family;
1176 }
1177
1178 /*
1179  * XXX the duplication here is horrid..
1180  * do we really need two methods doing essentially the same thing?
1181  */
1182 const char* User::GetIPString()
1183 {
1184         static char buf[1024];
1185
1186         if (this->ip == NULL)
1187                 return "";
1188
1189         switch (this->GetProtocolFamily())
1190         {
1191 #ifdef SUPPORT_IP6LINKS
1192                 case AF_INET6:
1193                 {
1194                         static char temp[1024];
1195
1196                         sockaddr_in6* sin = (sockaddr_in6*)this->ip;
1197                         inet_ntop(sin->sin6_family, &sin->sin6_addr, buf, sizeof(buf));
1198                         /* IP addresses starting with a : on irc are a Bad Thing (tm) */
1199                         if (*buf == ':')
1200                         {
1201                                 strlcpy(&temp[1], buf, sizeof(temp) - 1);
1202                                 *temp = '0';
1203                                 return temp;
1204                         }
1205                         return buf;
1206                 }
1207                 break;
1208 #endif
1209                 case AF_INET:
1210                 {
1211                         sockaddr_in* sin = (sockaddr_in*)this->ip;
1212                         inet_ntop(sin->sin_family, &sin->sin_addr, buf, sizeof(buf));
1213                         return buf;
1214                 }
1215                 break;
1216                 default:
1217                 break;
1218         }
1219         return "";
1220 }
1221
1222 /** NOTE: We cannot pass a const reference to this method.
1223  * The string is changed by the workings of the method,
1224  * so that if we pass const ref, we end up copying it to
1225  * something we can change anyway. Makes sense to just let
1226  * the compiler do that copy for us.
1227  */
1228 void User::Write(std::string text)
1229 {
1230         if (!ServerInstance->SE->BoundsCheckFd(this))
1231                 return;
1232
1233         try
1234         {
1235                 /* ServerInstance->Log(DEBUG,"C[%d] O %s", this->GetFd(), text.c_str());
1236                  * WARNING: The above debug line is VERY loud, do NOT
1237                  * enable it till we have a good way of filtering it
1238                  * out of the logs (e.g. 1.2 would be good).
1239                  */
1240                 text.append("\r\n");
1241         }
1242         catch (...)
1243         {
1244                 ServerInstance->Log(DEBUG,"Exception in User::Write() std::string::append");
1245                 return;
1246         }
1247
1248         if (ServerInstance->Config->GetIOHook(this->GetPort()))
1249         {
1250                 try
1251                 {
1252                         /* XXX: The lack of buffering here is NOT a bug, modules implementing this interface have to
1253                          * implement their own buffering mechanisms
1254                          */
1255                         ServerInstance->Config->GetIOHook(this->GetPort())->OnRawSocketWrite(this->fd, text.data(), text.length());
1256                 }
1257                 catch (CoreException& modexcept)
1258                 {
1259                         ServerInstance->Log(DEBUG, "%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
1260                 }
1261         }
1262         else
1263         {
1264                 this->AddWriteBuf(text);
1265         }
1266         ServerInstance->stats->statsSent += text.length();
1267         this->ServerInstance->SE->WantWrite(this);
1268 }
1269
1270 /** Write()
1271  */
1272 void User::Write(const char *text, ...)
1273 {
1274         va_list argsPtr;
1275         char textbuffer[MAXBUF];
1276
1277         va_start(argsPtr, text);
1278         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1279         va_end(argsPtr);
1280
1281         this->Write(std::string(textbuffer));
1282 }
1283
1284 void User::WriteServ(const std::string& text)
1285 {
1286         char textbuffer[MAXBUF];
1287
1288         snprintf(textbuffer,MAXBUF,":%s %s",ServerInstance->Config->ServerName,text.c_str());
1289         this->Write(std::string(textbuffer));
1290 }
1291
1292 /** WriteServ()
1293  *  Same as Write(), except `text' is prefixed with `:server.name '.
1294  */
1295 void User::WriteServ(const char* text, ...)
1296 {
1297         va_list argsPtr;
1298         char textbuffer[MAXBUF];
1299
1300         va_start(argsPtr, text);
1301         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1302         va_end(argsPtr);
1303
1304         this->WriteServ(std::string(textbuffer));
1305 }
1306
1307
1308 void User::WriteFrom(User *user, const std::string &text)
1309 {
1310         char tb[MAXBUF];
1311
1312         snprintf(tb,MAXBUF,":%s %s",user->GetFullHost(),text.c_str());
1313
1314         this->Write(std::string(tb));
1315 }
1316
1317
1318 /* write text from an originating user to originating user */
1319
1320 void User::WriteFrom(User *user, const char* text, ...)
1321 {
1322         va_list argsPtr;
1323         char textbuffer[MAXBUF];
1324
1325         va_start(argsPtr, text);
1326         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1327         va_end(argsPtr);
1328
1329         this->WriteFrom(user, std::string(textbuffer));
1330 }
1331
1332
1333 /* write text to an destination user from a source user (e.g. user privmsg) */
1334
1335 void User::WriteTo(User *dest, const char *data, ...)
1336 {
1337         char textbuffer[MAXBUF];
1338         va_list argsPtr;
1339
1340         va_start(argsPtr, data);
1341         vsnprintf(textbuffer, MAXBUF, data, argsPtr);
1342         va_end(argsPtr);
1343
1344         this->WriteTo(dest, std::string(textbuffer));
1345 }
1346
1347 void User::WriteTo(User *dest, const std::string &data)
1348 {
1349         dest->WriteFrom(this, data);
1350 }
1351
1352
1353 void User::WriteCommon(const char* text, ...)
1354 {
1355         char textbuffer[MAXBUF];
1356         va_list argsPtr;
1357
1358         if (this->registered != REG_ALL)
1359                 return;
1360
1361         va_start(argsPtr, text);
1362         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1363         va_end(argsPtr);
1364
1365         this->WriteCommon(std::string(textbuffer));
1366 }
1367
1368 void User::WriteCommon(const std::string &text)
1369 {
1370         try
1371         {
1372                 bool sent_to_at_least_one = false;
1373                 char tb[MAXBUF];
1374
1375                 if (this->registered != REG_ALL)
1376                         return;
1377
1378                 uniq_id++;
1379
1380                 /* We dont want to be doing this n times, just once */
1381                 snprintf(tb,MAXBUF,":%s %s",this->GetFullHost(),text.c_str());
1382                 std::string out = tb;
1383
1384                 for (UCListIter v = this->chans.begin(); v != this->chans.end(); v++)
1385                 {
1386                         CUList* ulist = v->first->GetUsers();
1387                         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1388                         {
1389                                 if ((IS_LOCAL(i->first)) && (already_sent[i->first->fd] != uniq_id))
1390                                 {
1391                                         already_sent[i->first->fd] = uniq_id;
1392                                         i->first->Write(out);
1393                                         sent_to_at_least_one = true;
1394                                 }
1395                         }
1396                 }
1397
1398                 /*
1399                  * if the user was not in any channels, no users will receive the text. Make sure the user
1400                  * receives their OWN message for WriteCommon
1401                  */
1402                 if (!sent_to_at_least_one)
1403                 {
1404                         this->Write(std::string(tb));
1405                 }
1406         }
1407
1408         catch (...)
1409         {
1410                 ServerInstance->Log(DEBUG,"Exception in User::WriteCommon()");
1411         }
1412 }
1413
1414
1415 /* write a formatted string to all users who share at least one common
1416  * channel, NOT including the source user e.g. for use in QUIT
1417  */
1418
1419 void User::WriteCommonExcept(const char* text, ...)
1420 {
1421         char textbuffer[MAXBUF];
1422         va_list argsPtr;
1423
1424         va_start(argsPtr, text);
1425         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1426         va_end(argsPtr);
1427
1428         this->WriteCommonExcept(std::string(textbuffer));
1429 }
1430
1431 void User::WriteCommonQuit(const std::string &normal_text, const std::string &oper_text)
1432 {
1433         char tb1[MAXBUF];
1434         char tb2[MAXBUF];
1435
1436         if (this->registered != REG_ALL)
1437                 return;
1438
1439         uniq_id++;
1440         snprintf(tb1,MAXBUF,":%s QUIT :%s",this->GetFullHost(),normal_text.c_str());
1441         snprintf(tb2,MAXBUF,":%s QUIT :%s",this->GetFullHost(),oper_text.c_str());
1442         std::string out1 = tb1;
1443         std::string out2 = tb2;
1444
1445         for (UCListIter v = this->chans.begin(); v != this->chans.end(); v++)
1446         {
1447                 CUList *ulist = v->first->GetUsers();
1448                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1449                 {
1450                         if (this != i->first)
1451                         {
1452                                 if ((IS_LOCAL(i->first)) && (already_sent[i->first->fd] != uniq_id))
1453                                 {
1454                                         already_sent[i->first->fd] = uniq_id;
1455                                         i->first->Write(IS_OPER(i->first) ? out2 : out1);
1456                                 }
1457                         }
1458                 }
1459         }
1460 }
1461
1462 void User::WriteCommonExcept(const std::string &text)
1463 {
1464         char tb1[MAXBUF];
1465         std::string out1;
1466
1467         if (this->registered != REG_ALL)
1468                 return;
1469
1470         uniq_id++;
1471         snprintf(tb1,MAXBUF,":%s %s",this->GetFullHost(),text.c_str());
1472         out1 = tb1;
1473
1474         for (UCListIter v = this->chans.begin(); v != this->chans.end(); v++)
1475         {
1476                 CUList *ulist = v->first->GetUsers();
1477                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1478                 {
1479                         if (this != i->first)
1480                         {
1481                                 if ((IS_LOCAL(i->first)) && (already_sent[i->first->fd] != uniq_id))
1482                                 {
1483                                         already_sent[i->first->fd] = uniq_id;
1484                                         i->first->Write(out1);
1485                                 }
1486                         }
1487                 }
1488         }
1489
1490 }
1491
1492 void User::WriteWallOps(const std::string &text)
1493 {
1494         if (!IS_OPER(this) && IS_LOCAL(this))
1495                 return;
1496
1497         std::string wallop("WALLOPS :");
1498         wallop.append(text);
1499
1500         for (std::vector<User*>::const_iterator i = ServerInstance->local_users.begin(); i != ServerInstance->local_users.end(); i++)
1501         {
1502                 User* t = *i;
1503                 if (t->IsModeSet('w'))
1504                         this->WriteTo(t,wallop);
1505         }
1506 }
1507
1508 void User::WriteWallOps(const char* text, ...)
1509 {
1510         char textbuffer[MAXBUF];
1511         va_list argsPtr;
1512
1513         va_start(argsPtr, text);
1514         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1515         va_end(argsPtr);
1516
1517         this->WriteWallOps(std::string(textbuffer));
1518 }
1519
1520 /* return 0 or 1 depending if users u and u2 share one or more common channels
1521  * (used by QUIT, NICK etc which arent channel specific notices)
1522  *
1523  * The old algorithm in 1.0 for this was relatively inefficient, iterating over
1524  * the first users channels then the second users channels within the outer loop,
1525  * therefore it was a maximum of x*y iterations (upon returning 0 and checking
1526  * all possible iterations). However this new function instead checks against the
1527  * channel's userlist in the inner loop which is a std::map<User*,User*>
1528  * and saves us time as we already know what pointer value we are after.
1529  * Don't quote me on the maths as i am not a mathematician or computer scientist,
1530  * but i believe this algorithm is now x+(log y) maximum iterations instead.
1531  */
1532 bool User::SharesChannelWith(User *other)
1533 {
1534         if ((!other) || (this->registered != REG_ALL) || (other->registered != REG_ALL))
1535                 return false;
1536
1537         /* Outer loop */
1538         for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1539         {
1540                 /* Eliminate the inner loop (which used to be ~equal in size to the outer loop)
1541                  * by replacing it with a map::find which *should* be more efficient
1542                  */
1543                 if (i->first->HasUser(other))
1544                         return true;
1545         }
1546         return false;
1547 }
1548
1549 bool User::ChangeName(const char* gecos)
1550 {
1551         if (!strcmp(gecos, this->fullname))
1552                 return true;
1553
1554         if (IS_LOCAL(this))
1555         {
1556                 int MOD_RESULT = 0;
1557                 FOREACH_RESULT(I_OnChangeLocalUserGECOS,OnChangeLocalUserGECOS(this,gecos));
1558                 if (MOD_RESULT)
1559                         return false;
1560                 FOREACH_MOD(I_OnChangeName,OnChangeName(this,gecos));
1561         }
1562         strlcpy(this->fullname,gecos,MAXGECOS+1);
1563
1564         return true;
1565 }
1566
1567 bool User::ChangeDisplayedHost(const char* host)
1568 {
1569         if (!strcmp(host, this->dhost))
1570                 return true;
1571
1572         if (IS_LOCAL(this))
1573         {
1574                 int MOD_RESULT = 0;
1575                 FOREACH_RESULT(I_OnChangeLocalUserHost,OnChangeLocalUserHost(this,host));
1576                 if (MOD_RESULT)
1577                         return false;
1578                 FOREACH_MOD(I_OnChangeHost,OnChangeHost(this,host));
1579         }
1580         if (this->ServerInstance->Config->CycleHosts)
1581                 this->WriteCommonExcept("QUIT :Changing hosts");
1582
1583         /* Fix by Om: User::dhost is 65 long, this was truncating some long hosts */
1584         strlcpy(this->dhost,host,64);
1585
1586         this->InvalidateCache();
1587
1588         if (this->ServerInstance->Config->CycleHosts)
1589         {
1590                 for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1591                 {
1592                         i->first->WriteAllExceptSender(this, false, 0, "JOIN %s", i->first->name);
1593                         std::string n = this->ServerInstance->Modes->ModeString(this, i->first);
1594                         if (n.length() > 0)
1595                                 i->first->WriteAllExceptSender(this, true, 0, "MODE %s +%s", i->first->name, n.c_str());
1596                 }
1597         }
1598
1599         if (IS_LOCAL(this))
1600                 this->WriteServ("396 %s %s :is now your displayed host",this->nick,this->dhost);
1601
1602         return true;
1603 }
1604
1605 bool User::ChangeIdent(const char* newident)
1606 {
1607         if (!strcmp(newident, this->ident))
1608                 return true;
1609
1610         if (this->ServerInstance->Config->CycleHosts)
1611                 this->WriteCommonExcept("%s","QUIT :Changing ident");
1612
1613         strlcpy(this->ident, newident, IDENTMAX+2);
1614
1615         this->InvalidateCache();
1616
1617         if (this->ServerInstance->Config->CycleHosts)
1618         {
1619                 for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1620                 {
1621                         i->first->WriteAllExceptSender(this, false, 0, "JOIN %s", i->first->name);
1622                         std::string n = this->ServerInstance->Modes->ModeString(this, i->first);
1623                         if (n.length() > 0)
1624                                 i->first->WriteAllExceptSender(this, true, 0, "MODE %s +%s", i->first->name, n.c_str());
1625                 }
1626         }
1627
1628         return true;
1629 }
1630
1631 void User::SendAll(const char* command, char* text, ...)
1632 {
1633         char textbuffer[MAXBUF];
1634         char formatbuffer[MAXBUF];
1635         va_list argsPtr;
1636
1637         va_start(argsPtr, text);
1638         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1639         va_end(argsPtr);
1640
1641         snprintf(formatbuffer,MAXBUF,":%s %s $* :%s", this->GetFullHost(), command, textbuffer);
1642         std::string fmt = formatbuffer;
1643
1644         for (std::vector<User*>::const_iterator i = ServerInstance->local_users.begin(); i != ServerInstance->local_users.end(); i++)
1645         {
1646                 (*i)->Write(fmt);
1647         }
1648 }
1649
1650
1651 std::string User::ChannelList(User* source)
1652 {
1653         try
1654         {
1655                 std::string list;
1656                 for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1657                 {
1658                         /* If the target is the same as the sender, let them see all their channels.
1659                          * If the channel is NOT private/secret OR the user shares a common channel
1660                          * If the user is an oper, and the <options:operspywhois> option is set.
1661                          */
1662                         if ((source == this) || (IS_OPER(source) && ServerInstance->Config->OperSpyWhois) || (((!i->first->IsModeSet('p')) && (!i->first->IsModeSet('s'))) || (i->first->HasUser(source))))
1663                         {
1664                                 list.append(i->first->GetPrefixChar(this)).append(i->first->name).append(" ");
1665                         }
1666                 }
1667                 return list;
1668         }
1669         catch (...)
1670         {
1671                 ServerInstance->Log(DEBUG,"Exception in User::ChannelList()");
1672                 return "";
1673         }
1674 }
1675
1676 void User::SplitChanList(User* dest, const std::string &cl)
1677 {
1678         std::string line;
1679         std::ostringstream prefix;
1680         std::string::size_type start, pos, length;
1681
1682         try
1683         {
1684                 prefix << this->nick << " " << dest->nick << " :";
1685                 line = prefix.str();
1686                 int namelen = strlen(ServerInstance->Config->ServerName) + 6;
1687
1688                 for (start = 0; (pos = cl.find(' ', start)) != std::string::npos; start = pos+1)
1689                 {
1690                         length = (pos == std::string::npos) ? cl.length() : pos;
1691
1692                         if (line.length() + namelen + length - start > 510)
1693                         {
1694                                 ServerInstance->SendWhoisLine(this, dest, 319, "%s", line.c_str());
1695                                 line = prefix.str();
1696                         }
1697
1698                         if(pos == std::string::npos)
1699                         {
1700                                 line.append(cl.substr(start, length - start));
1701                                 break;
1702                         }
1703                         else
1704                         {
1705                                 line.append(cl.substr(start, length - start + 1));
1706                         }
1707                 }
1708
1709                 if (line.length())
1710                 {
1711                         ServerInstance->SendWhoisLine(this, dest, 319, "%s", line.c_str());
1712                 }
1713         }
1714
1715         catch (...)
1716         {
1717                 ServerInstance->Log(DEBUG,"Exception in User::SplitChanList()");
1718         }
1719 }
1720
1721 unsigned int User::GetMaxChans()
1722 {
1723         return this->MaxChans;
1724 }
1725
1726
1727 /*
1728  * Sets a user's connection class.
1729  * If the class name is provided, it will be used. Otherwise, the class will be guessed using host/ip/ident/etc.
1730  * NOTE: If the <ALLOW> or <DENY> tag specifies an ip, and this user resolves,
1731  * then their ip will be taken as 'priority' anyway, so for example,
1732  * <connect allow="127.0.0.1"> will match joe!bloggs@localhost
1733  */
1734 ConnectClass* User::SetClass(const std::string &explicit_name)
1735 {
1736         ConnectClass *found = NULL;
1737
1738         if (!IS_LOCAL(this))
1739                 return NULL;
1740
1741         if (!explicit_name.empty())
1742         {
1743                 for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++)
1744                 {
1745                         ConnectClass* c = *i;
1746
1747                         if (explicit_name == c->GetName() && !c->GetDisabled())
1748                         {
1749                                 found = c;
1750                         }
1751                 }
1752         }
1753         else
1754         {
1755                 for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++)
1756                 {
1757                         ConnectClass* c = *i;
1758
1759                         if (((match(this->GetIPString(),c->GetHost().c_str(),true)) || (match(this->host,c->GetHost().c_str()))))
1760                         {
1761                                 if (c->GetPort())
1762                                 {
1763                                         if (this->GetPort() == c->GetPort() && !c->GetDisabled())
1764                                         {
1765                                                 found = c;
1766                                         }
1767                                         else
1768                                                 continue;
1769                                 }
1770                                 else
1771                                 {
1772                                         if (!c->GetDisabled())
1773                                                 found = c;
1774                                 }
1775                         }
1776                 }
1777         }
1778
1779         /* ensure we don't fuck things up refcount wise, only remove them from a class if we find a new one :P */
1780         if (found)
1781         {
1782                 /* deny change if change will take class over the limit */
1783                 if (found->limit && (found->RefCount + 1 >= found->limit))
1784                 {
1785                         ServerInstance->Log(DEBUG, "OOPS: Connect class limit (%u) hit, denying", found->limit);
1786                         return this->MyClass;
1787                 }
1788
1789                 /* should always be valid, but just in case .. */
1790                 if (this->MyClass)
1791                 {
1792                         if (found == this->MyClass) // no point changing this shit :P
1793                                 return this->MyClass;
1794                         this->MyClass->RefCount--;
1795                         ServerInstance->Log(DEBUG, "Untying user from connect class -- refcount: %u", this->MyClass->RefCount);
1796                 }
1797
1798                 this->MyClass = found;
1799                 this->MyClass->RefCount++;
1800                 ServerInstance->Log(DEBUG, "User tied to new class -- connect refcount now: %u", this->MyClass->RefCount);
1801         }
1802
1803         return this->MyClass;
1804 }
1805
1806 /* looks up a users password for their connection class (<ALLOW>/<DENY> tags)
1807  * NOTE: If the <ALLOW> or <DENY> tag specifies an ip, and this user resolves,
1808  * then their ip will be taken as 'priority' anyway, so for example,
1809  * <connect allow="127.0.0.1"> will match joe!bloggs@localhost
1810  */
1811 ConnectClass* User::GetClass()
1812 {
1813         return this->MyClass;
1814 }
1815
1816 void User::PurgeEmptyChannels()
1817 {
1818         std::vector<Channel*> to_delete;
1819
1820         // firstly decrement the count on each channel
1821         for (UCListIter f = this->chans.begin(); f != this->chans.end(); f++)
1822         {
1823                 f->first->RemoveAllPrefixes(this);
1824                 if (f->first->DelUser(this) == 0)
1825                 {
1826                         /* No users left in here, mark it for deletion */
1827                         try
1828                         {
1829                                 to_delete.push_back(f->first);
1830                         }
1831                         catch (...)
1832                         {
1833                                 ServerInstance->Log(DEBUG,"Exception in User::PurgeEmptyChannels to_delete.push_back()");
1834                         }
1835                 }
1836         }
1837
1838         for (std::vector<Channel*>::iterator n = to_delete.begin(); n != to_delete.end(); n++)
1839         {
1840                 Channel* thischan = *n;
1841                 chan_hash::iterator i2 = ServerInstance->chanlist->find(thischan->name);
1842                 if (i2 != ServerInstance->chanlist->end())
1843                 {
1844                         FOREACH_MOD(I_OnChannelDelete,OnChannelDelete(i2->second));
1845                         delete i2->second;
1846                         ServerInstance->chanlist->erase(i2);
1847                         this->chans.erase(*n);
1848                 }
1849         }
1850
1851         this->UnOper();
1852 }
1853
1854 void User::ShowMOTD()
1855 {
1856         if (!ServerInstance->Config->MOTD.size())
1857         {
1858                 this->WriteServ("422 %s :Message of the day file is missing.",this->nick);
1859                 return;
1860         }
1861         this->WriteServ("375 %s :%s message of the day", this->nick, ServerInstance->Config->ServerName);
1862
1863         for (file_cache::iterator i = ServerInstance->Config->MOTD.begin(); i != ServerInstance->Config->MOTD.end(); i++)
1864                 this->WriteServ("372 %s :- %s",this->nick,i->c_str());
1865
1866         this->WriteServ("376 %s :End of message of the day.", this->nick);
1867 }
1868
1869 void User::ShowRULES()
1870 {
1871         if (!ServerInstance->Config->RULES.size())
1872         {
1873                 this->WriteServ("434 %s :RULES File is missing",this->nick);
1874                 return;
1875         }
1876
1877         this->WriteServ("308 %s :- %s Server Rules -",this->nick,ServerInstance->Config->ServerName);
1878
1879         for (file_cache::iterator i = ServerInstance->Config->RULES.begin(); i != ServerInstance->Config->RULES.end(); i++)
1880                 this->WriteServ("232 %s :- %s",this->nick,i->c_str());
1881
1882         this->WriteServ("309 %s :End of RULES command.",this->nick);
1883 }
1884
1885 void User::HandleEvent(EventType et, int errornum)
1886 {
1887         /* WARNING: May delete this user! */
1888         int thisfd = this->GetFd();
1889
1890         try
1891         {
1892                 switch (et)
1893                 {
1894                         case EVENT_READ:
1895                                 ServerInstance->ProcessUser(this);
1896                         break;
1897                         case EVENT_WRITE:
1898                                 this->FlushWriteBuf();
1899                         break;
1900                         case EVENT_ERROR:
1901                                 /** This should be safe, but dont DARE do anything after it -- Brain */
1902                                 this->SetWriteError(errornum ? strerror(errornum) : "EOF from client");
1903                         break;
1904                 }
1905         }
1906         catch (...)
1907         {
1908                 ServerInstance->Log(DEBUG,"Exception in User::HandleEvent intercepted");
1909         }
1910
1911         /* If the user has raised an error whilst being processed, quit them now we're safe to */
1912         if ((ServerInstance->SE->GetRef(thisfd) == this))
1913         {
1914                 if (!WriteError.empty())
1915                 {
1916                         User::QuitUser(ServerInstance, this, GetWriteError());
1917                 }
1918         }
1919 }
1920
1921 void User::SetOperQuit(const std::string &oquit)
1922 {
1923         if (operquit)
1924                 return;
1925
1926         operquit = strdup(oquit.c_str());
1927 }
1928
1929 const char* User::GetOperQuit()
1930 {
1931         return operquit ? operquit : "";
1932 }
1933
1934 void User::IncreasePenalty(int increase)
1935 {
1936         this->Penalty += increase;
1937 }
1938
1939 void User::DecreasePenalty(int decrease)
1940 {
1941         this->Penalty -= decrease;
1942 }
1943
1944 VisData::VisData()
1945 {
1946 }
1947
1948 VisData::~VisData()
1949 {
1950 }
1951
1952 bool VisData::VisibleTo(User* user)
1953 {
1954         return true;
1955 }
1956