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                                 Instance->Log(DEBUG, std::string("BanCache: Adding positive hit for ") + New->GetIPString());
 865                                 Instance->BanCache->AddHit(New->GetIPString(), "Z", std::string("Z-Lined: ") + r->reason);
 866                                 r->Apply(New);
 867                                 return;
 868                         }
 869                 }
 870         }
 871
 872         if (socket > -1)
 873         {
 874                 if (!Instance->SE->AddFd(New))
 875                 {
 876                         Instance->Log(DEBUG,"Internal error on new connection");
 877                         User::QuitUser(Instance, New, "Internal error handling connection");
 878                 }
 879         }
 880
 881         /* NOTE: even if dns lookups are *off*, we still need to display this.
 882          * BOPM and other stuff requires it.
 883          */
 884         New->WriteServ("NOTICE Auth :*** Looking up your hostname...");
 885
 886         if (Instance->Config->NoUserDns)
 887         {
 888                 New->dns_done = true;
 889         }
 890         else
 891         {
 892                 New->StartDNSLookup();
 893         }
 894 }
 895
 896 unsigned long User::GlobalCloneCount()
 897 {
 898         clonemap::iterator x = ServerInstance->global_clones.find(this->GetIPString());
 899         if (x != ServerInstance->global_clones.end())
 900                 return x->second;
 901         else
 902                 return 0;
 903 }
 904
 905 unsigned long User::LocalCloneCount()
 906 {
 907         clonemap::iterator x = ServerInstance->local_clones.find(this->GetIPString());
 908         if (x != ServerInstance->local_clones.end())
 909                 return x->second;
 910         else
 911                 return 0;
 912 }
 913
 914 /*
 915  * Check class restrictions
 916  */
 917 void User::CheckClass()
 918 {
 919         ConnectClass* a = this->MyClass;
 920
 921         if ((!a) || (a->GetType() == CC_DENY))
 922         {
 923                 User::QuitUser(ServerInstance, this, "Unauthorised connection");
 924                 return;
 925         }
 926         else if ((a->GetMaxLocal()) && (this->LocalCloneCount() > a->GetMaxLocal()))
 927         {
 928                 User::QuitUser(ServerInstance, this, "No more connections allowed from your host via this connect class (local)");
 929                 ServerInstance->WriteOpers("*** WARNING: maximum LOCAL connections (%ld) exceeded for IP %s", a->GetMaxLocal(), this->GetIPString());
 930                 return;
 931         }
 932         else if ((a->GetMaxGlobal()) && (this->GlobalCloneCount() > a->GetMaxGlobal()))
 933         {
 934                 User::QuitUser(ServerInstance, this, "No more connections allowed from your host via this connect class (global)");
 935                 ServerInstance->WriteOpers("*** WARNING: maximum GLOBAL connections (%ld) exceeded for IP %s", a->GetMaxGlobal(), this->GetIPString());
 936                 return;
 937         }
 938
 939         this->nping = ServerInstance->Time() + a->GetPingTime() + ServerInstance->Config->dns_timeout;
 940         this->timeout = ServerInstance->Time() + a->GetRegTimeout();
 941         this->MaxChans = a->GetMaxChans();
 942 }
 943
 944 void User::FullConnect()
 945 {
 946         ServerInstance->stats->statsConnects++;
 947         this->idle_lastmsg = ServerInstance->Time();
 948
 949         /*
 950          * You may be thinking "wtf, we checked this in User::AddClient!" - and yes, we did, BUT.
 951          * At the time AddClient is called, we don't have a resolved host, by here we probably do - which
 952          * may put the user into a totally seperate class with different restrictions! so we *must* check again.
 953          * Don't remove this! -- w00t
 954          */
 955         this->SetClass();
 956
 957         /* Check the password, if one is required by the user's connect class.
 958          * This CANNOT be in CheckClass(), because that is called prior to PASS as well!
 959          */
 960         if (this->MyClass && !this->MyClass->GetPass().empty() && !this->haspassed)
 961         {
 962                 User::QuitUser(ServerInstance, this, "Invalid password");
 963                 return;
 964         }
 965
 966         if (!this->exempt)
 967         {
 968                 XLine* r = ServerInstance->XLines->MatchesLine("G",this);
 969
 970                 if (r)
 971                 {
 972                         this->muted = true;
 973                         r->Apply(this);
 974                         return;
 975                 }
 976
 977                 XLine* n = ServerInstance->XLines->MatchesLine("K",this);
 978
 979                 if (n)
 980                 {
 981                         this->muted = true;
 982                         n->Apply(this);
 983                         return;
 984                 }
 985         }
 986
 987         this->WriteServ("NOTICE Auth :Welcome to \002%s\002!",ServerInstance->Config->Network);
 988         this->WriteServ("001 %s :Welcome to the %s IRC Network %s!%s@%s",this->nick, ServerInstance->Config->Network, this->nick, this->ident, this->host);
 989         this->WriteServ("002 %s :Your host is %s, running version %s",this->nick,ServerInstance->Config->ServerName,VERSION);
 990         this->WriteServ("003 %s :This server was created %s %s", this->nick, __TIME__, __DATE__);
 991         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());
 992
 993         ServerInstance->Config->Send005(this);
 994
 995         this->WriteServ("042 %s %s :your unique ID", this->nick, this->uuid);
 996
 997
 998         this->ShowMOTD();
 999
1000         /* Now registered */
1001         if (ServerInstance->unregistered_count)
1002                 ServerInstance->unregistered_count--;
1003
1004         /* Trigger LUSERS output, give modules a chance too */
1005         int MOD_RESULT = 0;
1006         FOREACH_RESULT(I_OnPreCommand, OnPreCommand("LUSERS", NULL, 0, this, true, "LUSERS"));
1007         if (!MOD_RESULT)
1008                 ServerInstance->CallCommandHandler("LUSERS", NULL, 0, this);
1009
1010         /*
1011          * We don't set REG_ALL until triggering OnUserConnect, so some module events don't spew out stuff
1012          * for a user that doesn't exist yet.
1013          */
1014         FOREACH_MOD(I_OnUserConnect,OnUserConnect(this));
1015
1016         this->registered = REG_ALL;
1017
1018         FOREACH_MOD(I_OnPostConnect,OnPostConnect(this));
1019
1020         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);
1021 }
1022
1023 /** User::UpdateNick()
1024  * re-allocates a nick in the user_hash after they change nicknames,
1025  * returns a pointer to the new user as it may have moved
1026  */
1027 User* User::UpdateNickHash(const char* New)
1028 {
1029         try
1030         {
1031                 //user_hash::iterator newnick;
1032                 user_hash::iterator oldnick = ServerInstance->clientlist->find(this->nick);
1033
1034                 if (!strcasecmp(this->nick,New))
1035                         return oldnick->second;
1036
1037                 if (oldnick == ServerInstance->clientlist->end())
1038                         return NULL; /* doesnt exist */
1039
1040                 User* olduser = oldnick->second;
1041                 (*(ServerInstance->clientlist))[New] = olduser;
1042                 ServerInstance->clientlist->erase(oldnick);
1043                 return olduser;
1044         }
1045
1046         catch (...)
1047         {
1048                 ServerInstance->Log(DEBUG,"Exception in User::UpdateNickHash()");
1049                 return NULL;
1050         }
1051 }
1052
1053 void User::InvalidateCache()
1054 {
1055         /* Invalidate cache */
1056         if (cached_fullhost)
1057                 free(cached_fullhost);
1058         if (cached_hostip)
1059                 free(cached_hostip);
1060         if (cached_makehost)
1061                 free(cached_makehost);
1062         if (cached_fullrealhost)
1063                 free(cached_fullrealhost);
1064         cached_fullhost = cached_hostip = cached_makehost = cached_fullrealhost = NULL;
1065 }
1066
1067 bool User::ForceNickChange(const char* newnick)
1068 {
1069         try
1070         {
1071                 int MOD_RESULT = 0;
1072
1073                 this->InvalidateCache();
1074
1075                 FOREACH_RESULT(I_OnUserPreNick,OnUserPreNick(this, newnick));
1076
1077                 if (MOD_RESULT)
1078                 {
1079                         ServerInstance->stats->statsCollisions++;
1080                         return false;
1081                 }
1082
1083                 if (ServerInstance->XLines->MatchesLine("Q",newnick))
1084                 {
1085                         ServerInstance->stats->statsCollisions++;
1086                         return false;
1087                 }
1088
1089                 if (this->registered == REG_ALL)
1090                 {
1091                         std::deque<classbase*> dummy;
1092                         Command* nickhandler = ServerInstance->Parser->GetHandler("NICK");
1093                         if (nickhandler)
1094                         {
1095                                 nickhandler->HandleInternal(1, dummy);
1096                                 bool result = (ServerInstance->Parser->CallHandler("NICK", &newnick, 1, this) == CMD_SUCCESS);
1097                                 nickhandler->HandleInternal(0, dummy);
1098                                 return result;
1099                         }
1100                 }
1101                 return false;
1102         }
1103
1104         catch (...)
1105         {
1106                 ServerInstance->Log(DEBUG,"Exception in User::ForceNickChange()");
1107                 return false;
1108         }
1109 }
1110
1111 void User::SetSockAddr(int protocol_family, const char* ip, int port)
1112 {
1113         switch (protocol_family)
1114         {
1115 #ifdef SUPPORT_IP6LINKS
1116                 case AF_INET6:
1117                 {
1118                         sockaddr_in6* sin = new sockaddr_in6;
1119                         sin->sin6_family = AF_INET6;
1120                         sin->sin6_port = port;
1121                         inet_pton(AF_INET6, ip, &sin->sin6_addr);
1122                         this->ip = (sockaddr*)sin;
1123                 }
1124                 break;
1125 #endif
1126                 case AF_INET:
1127                 {
1128                         sockaddr_in* sin = new sockaddr_in;
1129                         sin->sin_family = AF_INET;
1130                         sin->sin_port = port;
1131                         inet_pton(AF_INET, ip, &sin->sin_addr);
1132                         this->ip = (sockaddr*)sin;
1133                 }
1134                 break;
1135                 default:
1136                         ServerInstance->Log(DEBUG,"Uh oh, I dont know protocol %d to be set on '%s'!", protocol_family, this->nick);
1137                 break;
1138         }
1139 }
1140
1141 int User::GetPort()
1142 {
1143         if (this->ip == NULL)
1144                 return 0;
1145
1146         switch (this->GetProtocolFamily())
1147         {
1148 #ifdef SUPPORT_IP6LINKS
1149                 case AF_INET6:
1150                 {
1151                         sockaddr_in6* sin = (sockaddr_in6*)this->ip;
1152                         return sin->sin6_port;
1153                 }
1154                 break;
1155 #endif
1156                 case AF_INET:
1157                 {
1158                         sockaddr_in* sin = (sockaddr_in*)this->ip;
1159                         return sin->sin_port;
1160                 }
1161                 break;
1162                 default:
1163                 break;
1164         }
1165         return 0;
1166 }
1167
1168 int User::GetProtocolFamily()
1169 {
1170         if (this->ip == NULL)
1171                 return 0;
1172
1173         sockaddr_in* sin = (sockaddr_in*)this->ip;
1174         return sin->sin_family;
1175 }
1176
1177 /*
1178  * XXX the duplication here is horrid..
1179  * do we really need two methods doing essentially the same thing?
1180  */
1181 const char* User::GetIPString()
1182 {
1183         static char buf[1024];
1184
1185         if (this->ip == NULL)
1186                 return "";
1187
1188         switch (this->GetProtocolFamily())
1189         {
1190 #ifdef SUPPORT_IP6LINKS
1191                 case AF_INET6:
1192                 {
1193                         static char temp[1024];
1194
1195                         sockaddr_in6* sin = (sockaddr_in6*)this->ip;
1196                         inet_ntop(sin->sin6_family, &sin->sin6_addr, buf, sizeof(buf));
1197                         /* IP addresses starting with a : on irc are a Bad Thing (tm) */
1198                         if (*buf == ':')
1199                         {
1200                                 strlcpy(&temp[1], buf, sizeof(temp) - 1);
1201                                 *temp = '0';
1202                                 return temp;
1203                         }
1204                         return buf;
1205                 }
1206                 break;
1207 #endif
1208                 case AF_INET:
1209                 {
1210                         sockaddr_in* sin = (sockaddr_in*)this->ip;
1211                         inet_ntop(sin->sin_family, &sin->sin_addr, buf, sizeof(buf));
1212                         return buf;
1213                 }
1214                 break;
1215                 default:
1216                 break;
1217         }
1218         return "";
1219 }
1220
1221 /** NOTE: We cannot pass a const reference to this method.
1222  * The string is changed by the workings of the method,
1223  * so that if we pass const ref, we end up copying it to
1224  * something we can change anyway. Makes sense to just let
1225  * the compiler do that copy for us.
1226  */
1227 void User::Write(std::string text)
1228 {
1229         if (!ServerInstance->SE->BoundsCheckFd(this))
1230                 return;
1231
1232         try
1233         {
1234                 /* ServerInstance->Log(DEBUG,"C[%d] O %s", this->GetFd(), text.c_str());
1235                  * WARNING: The above debug line is VERY loud, do NOT
1236                  * enable it till we have a good way of filtering it
1237                  * out of the logs (e.g. 1.2 would be good).
1238                  */
1239                 text.append("\r\n");
1240         }
1241         catch (...)
1242         {
1243                 ServerInstance->Log(DEBUG,"Exception in User::Write() std::string::append");
1244                 return;
1245         }
1246
1247         if (ServerInstance->Config->GetIOHook(this->GetPort()))
1248         {
1249                 try
1250                 {
1251                         /* XXX: The lack of buffering here is NOT a bug, modules implementing this interface have to
1252                          * implement their own buffering mechanisms
1253                          */
1254                         ServerInstance->Config->GetIOHook(this->GetPort())->OnRawSocketWrite(this->fd, text.data(), text.length());
1255                 }
1256                 catch (CoreException& modexcept)
1257                 {
1258                         ServerInstance->Log(DEBUG, "%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
1259                 }
1260         }
1261         else
1262         {
1263                 this->AddWriteBuf(text);
1264         }
1265         ServerInstance->stats->statsSent += text.length();
1266         this->ServerInstance->SE->WantWrite(this);
1267 }
1268
1269 /** Write()
1270  */
1271 void User::Write(const char *text, ...)
1272 {
1273         va_list argsPtr;
1274         char textbuffer[MAXBUF];
1275
1276         va_start(argsPtr, text);
1277         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1278         va_end(argsPtr);
1279
1280         this->Write(std::string(textbuffer));
1281 }
1282
1283 void User::WriteServ(const std::string& text)
1284 {
1285         char textbuffer[MAXBUF];
1286
1287         snprintf(textbuffer,MAXBUF,":%s %s",ServerInstance->Config->ServerName,text.c_str());
1288         this->Write(std::string(textbuffer));
1289 }
1290
1291 /** WriteServ()
1292  *  Same as Write(), except `text' is prefixed with `:server.name '.
1293  */
1294 void User::WriteServ(const char* text, ...)
1295 {
1296         va_list argsPtr;
1297         char textbuffer[MAXBUF];
1298
1299         va_start(argsPtr, text);
1300         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1301         va_end(argsPtr);
1302
1303         this->WriteServ(std::string(textbuffer));
1304 }
1305
1306
1307 void User::WriteFrom(User *user, const std::string &text)
1308 {
1309         char tb[MAXBUF];
1310
1311         snprintf(tb,MAXBUF,":%s %s",user->GetFullHost(),text.c_str());
1312
1313         this->Write(std::string(tb));
1314 }
1315
1316
1317 /* write text from an originating user to originating user */
1318
1319 void User::WriteFrom(User *user, const char* text, ...)
1320 {
1321         va_list argsPtr;
1322         char textbuffer[MAXBUF];
1323
1324         va_start(argsPtr, text);
1325         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1326         va_end(argsPtr);
1327
1328         this->WriteFrom(user, std::string(textbuffer));
1329 }
1330
1331
1332 /* write text to an destination user from a source user (e.g. user privmsg) */
1333
1334 void User::WriteTo(User *dest, const char *data, ...)
1335 {
1336         char textbuffer[MAXBUF];
1337         va_list argsPtr;
1338
1339         va_start(argsPtr, data);
1340         vsnprintf(textbuffer, MAXBUF, data, argsPtr);
1341         va_end(argsPtr);
1342
1343         this->WriteTo(dest, std::string(textbuffer));
1344 }
1345
1346 void User::WriteTo(User *dest, const std::string &data)
1347 {
1348         dest->WriteFrom(this, data);
1349 }
1350
1351
1352 void User::WriteCommon(const char* text, ...)
1353 {
1354         char textbuffer[MAXBUF];
1355         va_list argsPtr;
1356
1357         if (this->registered != REG_ALL)
1358                 return;
1359
1360         va_start(argsPtr, text);
1361         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1362         va_end(argsPtr);
1363
1364         this->WriteCommon(std::string(textbuffer));
1365 }
1366
1367 void User::WriteCommon(const std::string &text)
1368 {
1369         try
1370         {
1371                 bool sent_to_at_least_one = false;
1372                 char tb[MAXBUF];
1373
1374                 if (this->registered != REG_ALL)
1375                         return;
1376
1377                 uniq_id++;
1378
1379                 /* We dont want to be doing this n times, just once */
1380                 snprintf(tb,MAXBUF,":%s %s",this->GetFullHost(),text.c_str());
1381                 std::string out = tb;
1382
1383                 for (UCListIter v = this->chans.begin(); v != this->chans.end(); v++)
1384                 {
1385                         CUList* ulist = v->first->GetUsers();
1386                         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1387                         {
1388                                 if ((IS_LOCAL(i->first)) && (already_sent[i->first->fd] != uniq_id))
1389                                 {
1390                                         already_sent[i->first->fd] = uniq_id;
1391                                         i->first->Write(out);
1392                                         sent_to_at_least_one = true;
1393                                 }
1394                         }
1395                 }
1396
1397                 /*
1398                  * if the user was not in any channels, no users will receive the text. Make sure the user
1399                  * receives their OWN message for WriteCommon
1400                  */
1401                 if (!sent_to_at_least_one)
1402                 {
1403                         this->Write(std::string(tb));
1404                 }
1405         }
1406
1407         catch (...)
1408         {
1409                 ServerInstance->Log(DEBUG,"Exception in User::WriteCommon()");
1410         }
1411 }
1412
1413
1414 /* write a formatted string to all users who share at least one common
1415  * channel, NOT including the source user e.g. for use in QUIT
1416  */
1417
1418 void User::WriteCommonExcept(const char* text, ...)
1419 {
1420         char textbuffer[MAXBUF];
1421         va_list argsPtr;
1422
1423         va_start(argsPtr, text);
1424         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1425         va_end(argsPtr);
1426
1427         this->WriteCommonExcept(std::string(textbuffer));
1428 }
1429
1430 void User::WriteCommonQuit(const std::string &normal_text, const std::string &oper_text)
1431 {
1432         char tb1[MAXBUF];
1433         char tb2[MAXBUF];
1434
1435         if (this->registered != REG_ALL)
1436                 return;
1437
1438         uniq_id++;
1439         snprintf(tb1,MAXBUF,":%s QUIT :%s",this->GetFullHost(),normal_text.c_str());
1440         snprintf(tb2,MAXBUF,":%s QUIT :%s",this->GetFullHost(),oper_text.c_str());
1441         std::string out1 = tb1;
1442         std::string out2 = tb2;
1443
1444         for (UCListIter v = this->chans.begin(); v != this->chans.end(); v++)
1445         {
1446                 CUList *ulist = v->first->GetUsers();
1447                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1448                 {
1449                         if (this != i->first)
1450                         {
1451                                 if ((IS_LOCAL(i->first)) && (already_sent[i->first->fd] != uniq_id))
1452                                 {
1453                                         already_sent[i->first->fd] = uniq_id;
1454                                         i->first->Write(IS_OPER(i->first) ? out2 : out1);
1455                                 }
1456                         }
1457                 }
1458         }
1459 }
1460
1461 void User::WriteCommonExcept(const std::string &text)
1462 {
1463         char tb1[MAXBUF];
1464         std::string out1;
1465
1466         if (this->registered != REG_ALL)
1467                 return;
1468
1469         uniq_id++;
1470         snprintf(tb1,MAXBUF,":%s %s",this->GetFullHost(),text.c_str());
1471         out1 = tb1;
1472
1473         for (UCListIter v = this->chans.begin(); v != this->chans.end(); v++)
1474         {
1475                 CUList *ulist = v->first->GetUsers();
1476                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1477                 {
1478                         if (this != i->first)
1479                         {
1480                                 if ((IS_LOCAL(i->first)) && (already_sent[i->first->fd] != uniq_id))
1481                                 {
1482                                         already_sent[i->first->fd] = uniq_id;
1483                                         i->first->Write(out1);
1484                                 }
1485                         }
1486                 }
1487         }
1488
1489 }
1490
1491 void User::WriteWallOps(const std::string &text)
1492 {
1493         if (!IS_OPER(this) && IS_LOCAL(this))
1494                 return;
1495
1496         std::string wallop("WALLOPS :");
1497         wallop.append(text);
1498
1499         for (std::vector<User*>::const_iterator i = ServerInstance->local_users.begin(); i != ServerInstance->local_users.end(); i++)
1500         {
1501                 User* t = *i;
1502                 if (t->IsModeSet('w'))
1503                         this->WriteTo(t,wallop);
1504         }
1505 }
1506
1507 void User::WriteWallOps(const char* text, ...)
1508 {
1509         char textbuffer[MAXBUF];
1510         va_list argsPtr;
1511
1512         va_start(argsPtr, text);
1513         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1514         va_end(argsPtr);
1515
1516         this->WriteWallOps(std::string(textbuffer));
1517 }
1518
1519 /* return 0 or 1 depending if users u and u2 share one or more common channels
1520  * (used by QUIT, NICK etc which arent channel specific notices)
1521  *
1522  * The old algorithm in 1.0 for this was relatively inefficient, iterating over
1523  * the first users channels then the second users channels within the outer loop,
1524  * therefore it was a maximum of x*y iterations (upon returning 0 and checking
1525  * all possible iterations). However this new function instead checks against the
1526  * channel's userlist in the inner loop which is a std::map<User*,User*>
1527  * and saves us time as we already know what pointer value we are after.
1528  * Don't quote me on the maths as i am not a mathematician or computer scientist,
1529  * but i believe this algorithm is now x+(log y) maximum iterations instead.
1530  */
1531 bool User::SharesChannelWith(User *other)
1532 {
1533         if ((!other) || (this->registered != REG_ALL) || (other->registered != REG_ALL))
1534                 return false;
1535
1536         /* Outer loop */
1537         for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1538         {
1539                 /* Eliminate the inner loop (which used to be ~equal in size to the outer loop)
1540                  * by replacing it with a map::find which *should* be more efficient
1541                  */
1542                 if (i->first->HasUser(other))
1543                         return true;
1544         }
1545         return false;
1546 }
1547
1548 bool User::ChangeName(const char* gecos)
1549 {
1550         if (!strcmp(gecos, this->fullname))
1551                 return true;
1552
1553         if (IS_LOCAL(this))
1554         {
1555                 int MOD_RESULT = 0;
1556                 FOREACH_RESULT(I_OnChangeLocalUserGECOS,OnChangeLocalUserGECOS(this,gecos));
1557                 if (MOD_RESULT)
1558                         return false;
1559                 FOREACH_MOD(I_OnChangeName,OnChangeName(this,gecos));
1560         }
1561         strlcpy(this->fullname,gecos,MAXGECOS+1);
1562
1563         return true;
1564 }
1565
1566 bool User::ChangeDisplayedHost(const char* host)
1567 {
1568         if (!strcmp(host, this->dhost))
1569                 return true;
1570
1571         if (IS_LOCAL(this))
1572         {
1573                 int MOD_RESULT = 0;
1574                 FOREACH_RESULT(I_OnChangeLocalUserHost,OnChangeLocalUserHost(this,host));
1575                 if (MOD_RESULT)
1576                         return false;
1577                 FOREACH_MOD(I_OnChangeHost,OnChangeHost(this,host));
1578         }
1579         if (this->ServerInstance->Config->CycleHosts)
1580                 this->WriteCommonExcept("QUIT :Changing hosts");
1581
1582         /* Fix by Om: User::dhost is 65 long, this was truncating some long hosts */
1583         strlcpy(this->dhost,host,64);
1584
1585         this->InvalidateCache();
1586
1587         if (this->ServerInstance->Config->CycleHosts)
1588         {
1589                 for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1590                 {
1591                         i->first->WriteAllExceptSender(this, false, 0, "JOIN %s", i->first->name);
1592                         std::string n = this->ServerInstance->Modes->ModeString(this, i->first);
1593                         if (n.length() > 0)
1594                                 i->first->WriteAllExceptSender(this, true, 0, "MODE %s +%s", i->first->name, n.c_str());
1595                 }
1596         }
1597
1598         if (IS_LOCAL(this))
1599                 this->WriteServ("396 %s %s :is now your displayed host",this->nick,this->dhost);
1600
1601         return true;
1602 }
1603
1604 bool User::ChangeIdent(const char* newident)
1605 {
1606         if (!strcmp(newident, this->ident))
1607                 return true;
1608
1609         if (this->ServerInstance->Config->CycleHosts)
1610                 this->WriteCommonExcept("%s","QUIT :Changing ident");
1611
1612         strlcpy(this->ident, newident, IDENTMAX+2);
1613
1614         this->InvalidateCache();
1615
1616         if (this->ServerInstance->Config->CycleHosts)
1617         {
1618                 for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1619                 {
1620                         i->first->WriteAllExceptSender(this, false, 0, "JOIN %s", i->first->name);
1621                         std::string n = this->ServerInstance->Modes->ModeString(this, i->first);
1622                         if (n.length() > 0)
1623                                 i->first->WriteAllExceptSender(this, true, 0, "MODE %s +%s", i->first->name, n.c_str());
1624                 }
1625         }
1626
1627         return true;
1628 }
1629
1630 void User::SendAll(const char* command, char* text, ...)
1631 {
1632         char textbuffer[MAXBUF];
1633         char formatbuffer[MAXBUF];
1634         va_list argsPtr;
1635
1636         va_start(argsPtr, text);
1637         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1638         va_end(argsPtr);
1639
1640         snprintf(formatbuffer,MAXBUF,":%s %s $* :%s", this->GetFullHost(), command, textbuffer);
1641         std::string fmt = formatbuffer;
1642
1643         for (std::vector<User*>::const_iterator i = ServerInstance->local_users.begin(); i != ServerInstance->local_users.end(); i++)
1644         {
1645                 (*i)->Write(fmt);
1646         }
1647 }
1648
1649
1650 std::string User::ChannelList(User* source)
1651 {
1652         try
1653         {
1654                 std::string list;
1655                 for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1656                 {
1657                         /* If the target is the same as the sender, let them see all their channels.
1658                          * If the channel is NOT private/secret OR the user shares a common channel
1659                          * If the user is an oper, and the <options:operspywhois> option is set.
1660                          */
1661                         if ((source == this) || (IS_OPER(source) && ServerInstance->Config->OperSpyWhois) || (((!i->first->IsModeSet('p')) && (!i->first->IsModeSet('s'))) || (i->first->HasUser(source))))
1662                         {
1663                                 list.append(i->first->GetPrefixChar(this)).append(i->first->name).append(" ");
1664                         }
1665                 }
1666                 return list;
1667         }
1668         catch (...)
1669         {
1670                 ServerInstance->Log(DEBUG,"Exception in User::ChannelList()");
1671                 return "";
1672         }
1673 }
1674
1675 void User::SplitChanList(User* dest, const std::string &cl)
1676 {
1677         std::string line;
1678         std::ostringstream prefix;
1679         std::string::size_type start, pos, length;
1680
1681         try
1682         {
1683                 prefix << this->nick << " " << dest->nick << " :";
1684                 line = prefix.str();
1685                 int namelen = strlen(ServerInstance->Config->ServerName) + 6;
1686
1687                 for (start = 0; (pos = cl.find(' ', start)) != std::string::npos; start = pos+1)
1688                 {
1689                         length = (pos == std::string::npos) ? cl.length() : pos;
1690
1691                         if (line.length() + namelen + length - start > 510)
1692                         {
1693                                 ServerInstance->SendWhoisLine(this, dest, 319, "%s", line.c_str());
1694                                 line = prefix.str();
1695                         }
1696
1697                         if(pos == std::string::npos)
1698                         {
1699                                 line.append(cl.substr(start, length - start));
1700                                 break;
1701                         }
1702                         else
1703                         {
1704                                 line.append(cl.substr(start, length - start + 1));
1705                         }
1706                 }
1707
1708                 if (line.length())
1709                 {
1710                         ServerInstance->SendWhoisLine(this, dest, 319, "%s", line.c_str());
1711                 }
1712         }
1713
1714         catch (...)
1715         {
1716                 ServerInstance->Log(DEBUG,"Exception in User::SplitChanList()");
1717         }
1718 }
1719
1720 unsigned int User::GetMaxChans()
1721 {
1722         return this->MaxChans;
1723 }
1724
1725
1726 /*
1727  * Sets a user's connection class.
1728  * If the class name is provided, it will be used. Otherwise, the class will be guessed using host/ip/ident/etc.
1729  * NOTE: If the <ALLOW> or <DENY> tag specifies an ip, and this user resolves,
1730  * then their ip will be taken as 'priority' anyway, so for example,
1731  * <connect allow="127.0.0.1"> will match joe!bloggs@localhost
1732  */
1733 ConnectClass* User::SetClass(const std::string &explicit_name)
1734 {
1735         ConnectClass *found = NULL;
1736
1737         if (!IS_LOCAL(this))
1738                 return NULL;
1739
1740         if (!explicit_name.empty())
1741         {
1742                 for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++)
1743                 {
1744                         ConnectClass* c = *i;
1745
1746                         if (explicit_name == c->GetName() && !c->GetDisabled())
1747                         {
1748                                 found = c;
1749                         }
1750                 }
1751         }
1752         else
1753         {
1754                 for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++)
1755                 {
1756                         ConnectClass* c = *i;
1757
1758                         if (((match(this->GetIPString(),c->GetHost().c_str(),true)) || (match(this->host,c->GetHost().c_str()))))
1759                         {
1760                                 if (c->GetPort())
1761                                 {
1762                                         if (this->GetPort() == c->GetPort() && !c->GetDisabled())
1763                                         {
1764                                                 found = c;
1765                                         }
1766                                         else
1767                                                 continue;
1768                                 }
1769                                 else
1770                                 {
1771                                         if (!c->GetDisabled())
1772                                                 found = c;
1773                                 }
1774                         }
1775                 }
1776         }
1777
1778         /* ensure we don't fuck things up refcount wise, only remove them from a class if we find a new one :P */
1779         if (found)
1780         {
1781                 /* deny change if change will take class over the limit */
1782                 if (found->limit && (found->RefCount + 1 >= found->limit))
1783                 {
1784                         ServerInstance->Log(DEBUG, "OOPS: Connect class limit (%u) hit, denying", found->limit);
1785                         return this->MyClass;
1786                 }
1787
1788                 /* should always be valid, but just in case .. */
1789                 if (this->MyClass)
1790                 {
1791                         if (found == this->MyClass) // no point changing this shit :P
1792                                 return this->MyClass;
1793                         this->MyClass->RefCount--;
1794                         ServerInstance->Log(DEBUG, "Untying user from connect class -- refcount: %u", this->MyClass->RefCount);
1795                 }
1796
1797                 this->MyClass = found;
1798                 this->MyClass->RefCount++;
1799                 ServerInstance->Log(DEBUG, "User tied to new class -- connect refcount now: %u", this->MyClass->RefCount);
1800         }
1801
1802         return this->MyClass;
1803 }
1804
1805 /* looks up a users password for their connection class (<ALLOW>/<DENY> tags)
1806  * NOTE: If the <ALLOW> or <DENY> tag specifies an ip, and this user resolves,
1807  * then their ip will be taken as 'priority' anyway, so for example,
1808  * <connect allow="127.0.0.1"> will match joe!bloggs@localhost
1809  */
1810 ConnectClass* User::GetClass()
1811 {
1812         return this->MyClass;
1813 }
1814
1815 void User::PurgeEmptyChannels()
1816 {
1817         std::vector<Channel*> to_delete;
1818
1819         // firstly decrement the count on each channel
1820         for (UCListIter f = this->chans.begin(); f != this->chans.end(); f++)
1821         {
1822                 f->first->RemoveAllPrefixes(this);
1823                 if (f->first->DelUser(this) == 0)
1824                 {
1825                         /* No users left in here, mark it for deletion */
1826                         try
1827                         {
1828                                 to_delete.push_back(f->first);
1829                         }
1830                         catch (...)
1831                         {
1832                                 ServerInstance->Log(DEBUG,"Exception in User::PurgeEmptyChannels to_delete.push_back()");
1833                         }
1834                 }
1835         }
1836
1837         for (std::vector<Channel*>::iterator n = to_delete.begin(); n != to_delete.end(); n++)
1838         {
1839                 Channel* thischan = *n;
1840                 chan_hash::iterator i2 = ServerInstance->chanlist->find(thischan->name);
1841                 if (i2 != ServerInstance->chanlist->end())
1842                 {
1843                         FOREACH_MOD(I_OnChannelDelete,OnChannelDelete(i2->second));
1844                         delete i2->second;
1845                         ServerInstance->chanlist->erase(i2);
1846                         this->chans.erase(*n);
1847                 }
1848         }
1849
1850         this->UnOper();
1851 }
1852
1853 void User::ShowMOTD()
1854 {
1855         if (!ServerInstance->Config->MOTD.size())
1856         {
1857                 this->WriteServ("422 %s :Message of the day file is missing.",this->nick);
1858                 return;
1859         }
1860         this->WriteServ("375 %s :%s message of the day", this->nick, ServerInstance->Config->ServerName);
1861
1862         for (file_cache::iterator i = ServerInstance->Config->MOTD.begin(); i != ServerInstance->Config->MOTD.end(); i++)
1863                 this->WriteServ("372 %s :- %s",this->nick,i->c_str());
1864
1865         this->WriteServ("376 %s :End of message of the day.", this->nick);
1866 }
1867
1868 void User::ShowRULES()
1869 {
1870         if (!ServerInstance->Config->RULES.size())
1871         {
1872                 this->WriteServ("434 %s :RULES File is missing",this->nick);
1873                 return;
1874         }
1875
1876         this->WriteServ("308 %s :- %s Server Rules -",this->nick,ServerInstance->Config->ServerName);
1877
1878         for (file_cache::iterator i = ServerInstance->Config->RULES.begin(); i != ServerInstance->Config->RULES.end(); i++)
1879                 this->WriteServ("232 %s :- %s",this->nick,i->c_str());
1880
1881         this->WriteServ("309 %s :End of RULES command.",this->nick);
1882 }
1883
1884 void User::HandleEvent(EventType et, int errornum)
1885 {
1886         /* WARNING: May delete this user! */
1887         int thisfd = this->GetFd();
1888
1889         try
1890         {
1891                 switch (et)
1892                 {
1893                         case EVENT_READ:
1894                                 ServerInstance->ProcessUser(this);
1895                         break;
1896                         case EVENT_WRITE:
1897                                 this->FlushWriteBuf();
1898                         break;
1899                         case EVENT_ERROR:
1900                                 /** This should be safe, but dont DARE do anything after it -- Brain */
1901                                 this->SetWriteError(errornum ? strerror(errornum) : "EOF from client");
1902                         break;
1903                 }
1904         }
1905         catch (...)
1906         {
1907                 ServerInstance->Log(DEBUG,"Exception in User::HandleEvent intercepted");
1908         }
1909
1910         /* If the user has raised an error whilst being processed, quit them now we're safe to */
1911         if ((ServerInstance->SE->GetRef(thisfd) == this))
1912         {
1913                 if (!WriteError.empty())
1914                 {
1915                         User::QuitUser(ServerInstance, this, GetWriteError());
1916                 }
1917         }
1918 }
1919
1920 void User::SetOperQuit(const std::string &oquit)
1921 {
1922         if (operquit)
1923                 return;
1924
1925         operquit = strdup(oquit.c_str());
1926 }
1927
1928 const char* User::GetOperQuit()
1929 {
1930         return operquit ? operquit : "";
1931 }
1932
1933 void User::IncreasePenalty(int increase)
1934 {
1935         this->Penalty += increase;
1936 }
1937
1938 void User::DecreasePenalty(int decrease)
1939 {
1940         this->Penalty -= decrease;
1941 }
1942
1943 VisData::VisData()
1944 {
1945 }
1946
1947 VisData::~VisData()
1948 {
1949 }
1950
1951 bool VisData::VisibleTo(User* user)
1952 {
1953         return true;
1954 }
1955