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 #include "inspircd.h"
  15 #include <stdarg.h>
  16 #include "socketengine.h"
  17 #include "wildcard.h"
  18 #include "xline.h"
  19 #include "commands/cmd_whowas.h"
  20
  21 static unsigned long already_sent[MAX_DESCRIPTORS] = {0};
  22
  23 /* XXX: Used for speeding up WriteCommon operations */
  24 unsigned long uniq_id = 0;
  25
  26 std::string User::ProcessNoticeMasks(const char *sm)
  27 {
  28         bool adding = true, oldadding = false;
  29         const char *c = sm;
  30         std::string output;
  31
  32         while (c && *c)
  33         {
  34                 switch (*c)
  35                 {
  36                         case '+':
  37                                 adding = true;
  38                         break;
  39                         case '-':
  40                                 adding = false;
  41                         break;
  42                         case '*':
  43                                 for (unsigned char d = 'A'; d <= 'z'; d++)
  44                                 {
  45                                         if (ServerInstance->SNO->IsEnabled(d))
  46                                         {
  47                                                 if ((!IsNoticeMaskSet(d) && adding) || (IsNoticeMaskSet(d) && !adding))
  48                                                 {
  49                                                         if ((oldadding != adding) || (!output.length()))
  50                                                                 output += (adding ? '+' : '-');
  51
  52                                                         this->SetNoticeMask(d, adding);
  53
  54                                                         output += d;
  55                                                 }
  56                                         }
  57                                         oldadding = adding;
  58                                 }
  59                         break;
  60                         default:
  61                                 if ((*c >= 'A') && (*c <= 'z') && (ServerInstance->SNO->IsEnabled(*c)))
  62                                 {
  63                                         if ((!IsNoticeMaskSet(*c) && adding) || (IsNoticeMaskSet(*c) && !adding))
  64                                         {
  65                                                 if ((oldadding != adding) || (!output.length()))
  66                                                         output += (adding ? '+' : '-');
  67
  68                                                 this->SetNoticeMask(*c, adding);
  69
  70                                                 output += *c;
  71                                         }
  72                                 }
  73                                 oldadding = adding;
  74                         break;
  75                 }
  76
  77                 *c++;
  78         }
  79
  80         return output;
  81 }
  82
  83 void User::StartDNSLookup()
  84 {
  85         try
  86         {
  87                 bool cached;
  88                 const char* ip = this->GetIPString();
  89
  90                 /* Special case for 4in6 (Have i mentioned i HATE 4in6?) */
  91                 if (!strncmp(ip, "0::ffff:", 8))
  92                         res_reverse = new UserResolver(this->ServerInstance, this, ip + 8, DNS_QUERY_PTR4, cached);
  93                 else
  94                         res_reverse = new UserResolver(this->ServerInstance, this, ip, this->GetProtocolFamily() == AF_INET ? DNS_QUERY_PTR4 : DNS_QUERY_PTR6, cached);
  95
  96                 this->ServerInstance->AddResolver(res_reverse, cached);
  97         }
  98         catch (CoreException& e)
  99         {
 100                 ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
 101         }
 102 }
 103
 104 bool User::IsNoticeMaskSet(unsigned char sm)
 105 {
 106         return (snomasks[sm-65]);
 107 }
 108
 109 void User::SetNoticeMask(unsigned char sm, bool value)
 110 {
 111         snomasks[sm-65] = value;
 112 }
 113
 114 const char* User::FormatNoticeMasks()
 115 {
 116         static char data[MAXBUF];
 117         int offset = 0;
 118
 119         for (int n = 0; n < 64; n++)
 120         {
 121                 if (snomasks[n])
 122                         data[offset++] = n+65;
 123         }
 124
 125         data[offset] = 0;
 126         return data;
 127 }
 128
 129
 130
 131 bool User::IsModeSet(unsigned char m)
 132 {
 133         return (modes[m-65]);
 134 }
 135
 136 void User::SetMode(unsigned char m, bool value)
 137 {
 138         modes[m-65] = value;
 139 }
 140
 141 const char* User::FormatModes()
 142 {
 143         static char data[MAXBUF];
 144         int offset = 0;
 145         for (int n = 0; n < 64; n++)
 146         {
 147                 if (modes[n])
 148                         data[offset++] = n+65;
 149         }
 150         data[offset] = 0;
 151         return data;
 152 }
 153
 154 void User::DecrementModes()
 155 {
 156         ServerInstance->Log(DEBUG,"DecrementModes()");
 157         for (unsigned char n = 'A'; n <= 'z'; n++)
 158         {
 159                 if (modes[n-65])
 160                 {
 161                         ServerInstance->Log(DEBUG,"DecrementModes() found mode %c", n);
 162                         ModeHandler* mh = ServerInstance->Modes->FindMode(n, MODETYPE_USER);
 163                         if (mh)
 164                         {
 165                                 ServerInstance->Log(DEBUG,"Found handler %c and call ChangeCount", n);
 166                                 mh->ChangeCount(-1);
 167                         }
 168                 }
 169         }
 170 }
 171
 172 User::User(InspIRCd* Instance, const std::string &uid) : ServerInstance(Instance)
 173 {
 174         *password = *nick = *ident = *host = *dhost = *fullname = *awaymsg = *oper = *uuid = 0;
 175         server = (char*)Instance->FindServerNamePtr(Instance->Config->ServerName);
 176         reset_due = ServerInstance->Time();
 177         age = ServerInstance->Time(true);
 178         lines_in = lastping = signon = idle_lastmsg = nping = registered = 0;
 179         ChannelCount = timeout = flood = bytes_in = bytes_out = cmds_in = cmds_out = 0;
 180         muted = exempt = haspassed = dns_done = false;
 181         fd = -1;
 182         recvq.clear();
 183         sendq.clear();
 184         WriteError.clear();
 185         res_forward = res_reverse = NULL;
 186         Visibility = NULL;
 187         ip = NULL;
 188         chans.clear();
 189         invites.clear();
 190         memset(modes,0,sizeof(modes));
 191         memset(snomasks,0,sizeof(snomasks));
 192         /* Invalidate cache */
 193         operquit = cached_fullhost = cached_hostip = cached_makehost = cached_fullrealhost = NULL;
 194
 195         if (uid.empty())
 196                 strlcpy(uuid, Instance->GetUID().c_str(), UUID_LENGTH);
 197         else
 198                 strlcpy(uuid, uid.c_str(), UUID_LENGTH);
 199
 200         ServerInstance->Log(DEBUG,"New UUID for user: %s (%s)", uuid, uid.empty() ? "allocated new" : "used remote");
 201
 202         user_hash::iterator finduuid = Instance->uuidlist->find(uuid);
 203         if (finduuid == Instance->uuidlist->end())
 204                 (*Instance->uuidlist)[uuid] = this;
 205         else
 206                 throw CoreException("Duplicate UUID "+std::string(uuid)+" in User constructor");
 207 }
 208
 209 void User::RemoveCloneCounts()
 210 {
 211         clonemap::iterator x = ServerInstance->local_clones.find(this->GetIPString());
 212         if (x != ServerInstance->local_clones.end())
 213         {
 214                 x->second--;
 215                 if (!x->second)
 216                 {
 217                         ServerInstance->local_clones.erase(x);
 218                 }
 219         }
 220
 221         clonemap::iterator y = ServerInstance->global_clones.find(this->GetIPString());
 222         if (y != ServerInstance->global_clones.end())
 223         {
 224                 y->second--;
 225                 if (!y->second)
 226                 {
 227                         ServerInstance->global_clones.erase(y);
 228                 }
 229         }
 230 }
 231
 232 User::~User()
 233 {
 234         this->InvalidateCache();
 235         this->DecrementModes();
 236         if (operquit)
 237                 free(operquit);
 238         if (ip)
 239         {
 240                 this->RemoveCloneCounts();
 241
 242                 if (this->GetProtocolFamily() == AF_INET)
 243                 {
 244                         delete (sockaddr_in*)ip;
 245                 }
 246 #ifdef SUPPORT_IP6LINKS
 247                 else
 248                 {
 249                         delete (sockaddr_in6*)ip;
 250                 }
 251 #endif
 252         }
 253
 254         ServerInstance->uuidlist->erase(uuid);
 255 }
 256
 257 char* User::MakeHost()
 258 {
 259         if (this->cached_makehost)
 260                 return this->cached_makehost;
 261
 262         char nhost[MAXBUF];
 263         /* This is much faster than snprintf */
 264         char* t = nhost;
 265         for(char* n = ident; *n; n++)
 266                 *t++ = *n;
 267         *t++ = '@';
 268         for(char* n = host; *n; n++)
 269                 *t++ = *n;
 270         *t = 0;
 271
 272         this->cached_makehost = strdup(nhost);
 273
 274         return this->cached_makehost;
 275 }
 276
 277 char* User::MakeHostIP()
 278 {
 279         if (this->cached_hostip)
 280                 return this->cached_hostip;
 281
 282         char ihost[MAXBUF];
 283         /* This is much faster than snprintf */
 284         char* t = ihost;
 285         for(char* n = ident; *n; n++)
 286                 *t++ = *n;
 287         *t++ = '@';
 288         for(const char* n = this->GetIPString(); *n; n++)
 289                 *t++ = *n;
 290         *t = 0;
 291
 292         this->cached_hostip = strdup(ihost);
 293
 294         return this->cached_hostip;
 295 }
 296
 297 void User::CloseSocket()
 298 {
 299         ServerInstance->SE->Shutdown(this, 2);
 300         ServerInstance->SE->Close(this);
 301 }
 302
 303 char* User::GetFullHost()
 304 {
 305         if (this->cached_fullhost)
 306                 return this->cached_fullhost;
 307
 308         char result[MAXBUF];
 309         char* t = result;
 310         for(char* n = nick; *n; n++)
 311                 *t++ = *n;
 312         *t++ = '!';
 313         for(char* n = ident; *n; n++)
 314                 *t++ = *n;
 315         *t++ = '@';
 316         for(char* n = dhost; *n; n++)
 317                 *t++ = *n;
 318         *t = 0;
 319
 320         this->cached_fullhost = strdup(result);
 321
 322         return this->cached_fullhost;
 323 }
 324
 325 char* User::MakeWildHost()
 326 {
 327         static char nresult[MAXBUF];
 328         char* t = nresult;
 329         *t++ = '*';     *t++ = '!';
 330         *t++ = '*';     *t++ = '@';
 331         for(char* n = dhost; *n; n++)
 332                 *t++ = *n;
 333         *t = 0;
 334         return nresult;
 335 }
 336
 337 int User::ReadData(void* buffer, size_t size)
 338 {
 339         if (IS_LOCAL(this))
 340         {
 341 #ifndef WIN32
 342                 return read(this->fd, buffer, size);
 343 #else
 344                 return recv(this->fd, (char*)buffer, size, 0);
 345 #endif
 346         }
 347         else
 348                 return 0;
 349 }
 350
 351
 352 char* User::GetFullRealHost()
 353 {
 354         if (this->cached_fullrealhost)
 355                 return this->cached_fullrealhost;
 356
 357         char fresult[MAXBUF];
 358         char* t = fresult;
 359         for(char* n = nick; *n; n++)
 360                 *t++ = *n;
 361         *t++ = '!';
 362         for(char* n = ident; *n; n++)
 363                 *t++ = *n;
 364         *t++ = '@';
 365         for(char* n = host; *n; n++)
 366                 *t++ = *n;
 367         *t = 0;
 368
 369         this->cached_fullrealhost = strdup(fresult);
 370
 371         return this->cached_fullrealhost;
 372 }
 373
 374 bool User::IsInvited(const irc::string &channel)
 375 {
 376         for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
 377         {
 378                 if (channel == *i)
 379                 {
 380                         return true;
 381                 }
 382         }
 383         return false;
 384 }
 385
 386 InvitedList* User::GetInviteList()
 387 {
 388         return &invites;
 389 }
 390
 391 void User::InviteTo(const irc::string &channel)
 392 {
 393         invites.push_back(channel);
 394 }
 395
 396 void User::RemoveInvite(const irc::string &channel)
 397 {
 398         for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
 399         {
 400                 if (channel == *i)
 401                 {
 402                         invites.erase(i);
 403                         return;
 404                 }
 405         }
 406 }
 407
 408 bool User::HasPermission(const std::string &command)
 409 {
 410         char* mycmd;
 411         char* savept;
 412         char* savept2;
 413
 414         /*
 415          * users on remote servers can completely bypass all permissions based checks.
 416          * This prevents desyncs when one server has different type/class tags to another.
 417          * That having been said, this does open things up to the possibility of source changes
 418          * allowing remote kills, etc - but if they have access to the src, they most likely have
 419          * access to the conf - so it's an end to a means either way.
 420          */
 421         if (!IS_LOCAL(this))
 422                 return true;
 423
 424         // are they even an oper at all?
 425         if (!IS_OPER(this))
 426         {
 427                 return false;
 428         }
 429
 430         // check their opertype exists (!). This won't affect local users, of course.
 431         opertype_t::iterator iter_opertype = ServerInstance->Config->opertypes.find(this->oper);
 432         if (iter_opertype == ServerInstance->Config->opertypes.end())
 433         {
 434                 return false;
 435         }
 436
 437         /* XXX all this strtok/strdup stuff is a bit ick and horrid -- w00t */
 438         char* Classes = strdup(iter_opertype->second);
 439         char* myclass = strtok_r(Classes," ",&savept);
 440         while (myclass)
 441         {
 442                 operclass_t::iterator iter_operclass = ServerInstance->Config->operclass.find(myclass);
 443                 if (iter_operclass != ServerInstance->Config->operclass.end())
 444                 {
 445                         char* CommandList = strdup(iter_operclass->second);
 446                         mycmd = strtok_r(CommandList," ",&savept2);
 447                         while (mycmd)
 448                         {
 449                                 if ((!strcasecmp(mycmd,command.c_str())) || (*mycmd == '*'))
 450                                 {
 451                                         free(Classes);
 452                                         free(CommandList);
 453                                         return true;
 454                                 }
 455                                 mycmd = strtok_r(NULL," ",&savept2);
 456                         }
 457                         free(CommandList);
 458                 }
 459                 myclass = strtok_r(NULL," ",&savept);
 460         }
 461         free(Classes);
 462
 463         return false;
 464 }
 465
 466 /** NOTE: We cannot pass a const reference to this method.
 467  * The string is changed by the workings of the method,
 468  * so that if we pass const ref, we end up copying it to
 469  * something we can change anyway. Makes sense to just let
 470  * the compiler do that copy for us.
 471  */
 472 bool User::AddBuffer(std::string a)
 473 {
 474         try
 475         {
 476                 std::string::size_type i = a.rfind('\r');
 477
 478                 while (i != std::string::npos)
 479                 {
 480                         a.erase(i, 1);
 481                         i = a.rfind('\r');
 482                 }
 483
 484                 if (a.length())
 485                         recvq.append(a);
 486
 487                 if (recvq.length() > (unsigned)this->recvqmax)
 488                 {
 489                         this->SetWriteError("RecvQ exceeded");
 490                         ServerInstance->WriteOpers("*** User %s RecvQ of %d exceeds connect class maximum of %d",this->nick,recvq.length(),this->recvqmax);
 491                         return false;
 492                 }
 493
 494                 return true;
 495         }
 496
 497         catch (...)
 498         {
 499                 ServerInstance->Log(DEBUG,"Exception in User::AddBuffer()");
 500                 return false;
 501         }
 502 }
 503
 504 bool User::BufferIsReady()
 505 {
 506         return (recvq.find('\n') != std::string::npos);
 507 }
 508
 509 void User::ClearBuffer()
 510 {
 511         recvq.clear();
 512 }
 513
 514 std::string User::GetBuffer()
 515 {
 516         try
 517         {
 518                 if (!recvq.length())
 519                         return "";
 520
 521                 /* Strip any leading \r or \n off the string.
 522                  * Usually there are only one or two of these,
 523                  * so its is computationally cheap to do.
 524                  */
 525                 std::string::iterator t = recvq.begin();
 526                 while (t != recvq.end() && (*t == '\r' || *t == '\n'))
 527                 {
 528                         recvq.erase(t);
 529                         t = recvq.begin();
 530                 }
 531
 532                 for (std::string::iterator x = recvq.begin(); x != recvq.end(); x++)
 533                 {
 534                         /* Find the first complete line, return it as the
 535                          * result, and leave the recvq as whats left
 536                          */
 537                         if (*x == '\n')
 538                         {
 539                                 std::string ret = std::string(recvq.begin(), x);
 540                                 recvq.erase(recvq.begin(), x + 1);
 541                                 return ret;
 542                         }
 543                 }
 544                 return "";
 545         }
 546
 547         catch (...)
 548         {
 549                 ServerInstance->Log(DEBUG,"Exception in User::GetBuffer()");
 550                 return "";
 551         }
 552 }
 553
 554 void User::AddWriteBuf(const std::string &data)
 555 {
 556         if (*this->GetWriteError())
 557                 return;
 558
 559         if (sendq.length() + data.length() > (unsigned)this->sendqmax)
 560         {
 561                 /*
 562                  * Fix by brain - Set the error text BEFORE calling writeopers, because
 563                  * if we dont it'll recursively  call here over and over again trying
 564                  * to repeatedly add the text to the sendq!
 565                  */
 566                 this->SetWriteError("SendQ exceeded");
 567                 ServerInstance->WriteOpers("*** User %s SendQ of %d exceeds connect class maximum of %d",this->nick,sendq.length() + data.length(),this->sendqmax);
 568                 return;
 569         }
 570
 571         try
 572         {
 573                 if (data.length() > MAXBUF - 2) /* MAXBUF has a value of 514, to account for line terminators */
 574                         sendq.append(data.substr(0,MAXBUF - 4)).append("\r\n"); /* MAXBUF-4 = 510 */
 575                 else
 576                         sendq.append(data);
 577         }
 578         catch (...)
 579         {
 580                 this->SetWriteError("SendQ exceeded");
 581                 ServerInstance->WriteOpers("*** User %s SendQ got an exception",this->nick);
 582         }
 583 }
 584
 585 // send AS MUCH OF THE USERS SENDQ as we are able to (might not be all of it)
 586 void User::FlushWriteBuf()
 587 {
 588         try
 589         {
 590                 if ((this->fd == FD_MAGIC_NUMBER) || (*this->GetWriteError()))
 591                 {
 592                         sendq.clear();
 593                 }
 594                 if ((sendq.length()) && (this->fd != FD_MAGIC_NUMBER))
 595                 {
 596                         int old_sendq_length = sendq.length();
 597                         int n_sent = ServerInstance->SE->Send(this, this->sendq.data(), this->sendq.length(), 0);
 598
 599                         if (n_sent == -1)
 600                         {
 601                                 if (errno == EAGAIN)
 602                                 {
 603                                         /* The socket buffer is full. This isnt fatal,
 604                                          * try again later.
 605                                          */
 606                                         this->ServerInstance->SE->WantWrite(this);
 607                                 }
 608                                 else
 609                                 {
 610                                         /* Fatal error, set write error and bail
 611                                          */
 612                                         this->SetWriteError(errno ? strerror(errno) : "EOF from client");
 613                                         return;
 614                                 }
 615                         }
 616                         else
 617                         {
 618                                 /* advance the queue */
 619                                 if (n_sent)
 620                                         this->sendq = this->sendq.substr(n_sent);
 621                                 /* update the user's stats counters */
 622                                 this->bytes_out += n_sent;
 623                                 this->cmds_out++;
 624                                 if (n_sent != old_sendq_length)
 625                                         this->ServerInstance->SE->WantWrite(this);
 626                         }
 627                 }
 628         }
 629
 630         catch (...)
 631         {
 632                 ServerInstance->Log(DEBUG,"Exception in User::FlushWriteBuf()");
 633         }
 634
 635         if (this->sendq.empty())
 636         {
 637                 FOREACH_MOD(I_OnBufferFlushed,OnBufferFlushed(this));
 638         }
 639 }
 640
 641 void User::SetWriteError(const std::string &error)
 642 {
 643         try
 644         {
 645                 // don't try to set the error twice, its already set take the first string.
 646                 if (this->WriteError.empty())
 647                         this->WriteError = error;
 648         }
 649
 650         catch (...)
 651         {
 652                 ServerInstance->Log(DEBUG,"Exception in User::SetWriteError()");
 653         }
 654 }
 655
 656 const char* User::GetWriteError()
 657 {
 658         return this->WriteError.c_str();
 659 }
 660
 661 void User::Oper(const std::string &opertype)
 662 {
 663         try
 664         {
 665                 this->modes[UM_OPERATOR] = 1;
 666                 this->WriteServ("MODE %s :+o", this->nick);
 667                 FOREACH_MOD(I_OnOper, OnOper(this, opertype));
 668                 ServerInstance->Log(DEFAULT,"OPER: %s!%s@%s opered as type: %s", this->nick, this->ident, this->host, opertype.c_str());
 669                 strlcpy(this->oper, opertype.c_str(), NICKMAX - 1);
 670                 ServerInstance->all_opers.push_back(this);
 671                 FOREACH_MOD(I_OnPostOper,OnPostOper(this, opertype));
 672         }
 673
 674         catch (...)
 675         {
 676                 ServerInstance->Log(DEBUG,"Exception in User::Oper()");
 677         }
 678 }
 679
 680 void User::UnOper()
 681 {
 682         try
 683         {
 684                 if (IS_OPER(this))
 685                 {
 686                         // unset their oper type (what IS_OPER checks), and remove +o
 687                         *this->oper = 0;
 688                         this->modes[UM_OPERATOR] = 0;
 689
 690                         // remove the user from the oper list. Will remove multiple entries as a safeguard against bug #404
 691                         ServerInstance->all_opers.remove(this);
 692                 }
 693         }
 694
 695         catch (...)
 696         {
 697                 ServerInstance->Log(DEBUG,"Exception in User::UnOper()");
 698         }
 699 }
 700
 701 void User::QuitUser(InspIRCd* Instance, User *user, const std::string &quitreason, const char* operreason)
 702 {
 703         user->Write("ERROR :Closing link (%s@%s) [%s]", user->ident, user->host, operreason);
 704         user->muted = true;
 705         Instance->GlobalCulls.AddItem(user, quitreason.c_str(), operreason);
 706 }
 707
 708 /* adds or updates an entry in the whowas list */
 709 void User::AddToWhoWas()
 710 {
 711         Command* whowas_command = ServerInstance->Parser->GetHandler("WHOWAS");
 712         if (whowas_command)
 713         {
 714                 std::deque<classbase*> params;
 715                 params.push_back(this);
 716                 whowas_command->HandleInternal(WHOWAS_ADD, params);
 717         }
 718 }
 719
 720 /* add a client connection to the sockets list */
 721 void User::AddClient(InspIRCd* Instance, int socket, int port, bool iscached, int socketfamily, sockaddr* ip)
 722 {
 723         /* NOTE: Calling this one parameter constructor for User automatically
 724          * allocates a new UUID and places it in the hash_map.
 725          */
 726         User* New = NULL;
 727         try
 728         {
 729                 New = new User(Instance);
 730         }
 731         catch (...)
 732         {
 733                 Instance->Log(DEFAULT,"*** WTF *** Duplicated UUID! -- Crack smoking monkies have been unleashed.");
 734                 Instance->WriteOpers("*** WARNING *** Duplicate UUID allocated!");
 735                 return;
 736         }
 737
 738         int j = 0;
 739
 740         Instance->unregistered_count++;
 741
 742         char ipaddr[MAXBUF];
 743 #ifdef IPV6
 744         if (socketfamily == AF_INET6)
 745                 inet_ntop(AF_INET6, &((const sockaddr_in6*)ip)->sin6_addr, ipaddr, sizeof(ipaddr));
 746         else
 747 #endif
 748         inet_ntop(AF_INET, &((const sockaddr_in*)ip)->sin_addr, ipaddr, sizeof(ipaddr));
 749
 750         (*(Instance->clientlist))[New->uuid] = New;
 751         New->SetFd(socket);
 752
 753         /* The users default nick is their UUID */
 754         strlcpy(New->nick, New->uuid, NICKMAX - 1);
 755
 756         New->server = Instance->FindServerNamePtr(Instance->Config->ServerName);
 757         /* We don't need range checking here, we KNOW 'unknown\0' will fit into the ident field. */
 758         strcpy(New->ident, "unknown");
 759
 760         New->registered = REG_NONE;
 761         New->signon = Instance->Time() + Instance->Config->dns_timeout;
 762         New->lastping = 1;
 763
 764         New->SetSockAddr(socketfamily, ipaddr, port);
 765
 766         /* Smarter than your average bear^H^H^H^Hset of strlcpys. */
 767         for (const char* temp = New->GetIPString(); *temp && j < 64; temp++, j++)
 768                 New->dhost[j] = New->host[j] = *temp;
 769         New->dhost[j] = New->host[j] = 0;
 770
 771         Instance->AddLocalClone(New);
 772         Instance->AddGlobalClone(New);
 773
 774         /*
 775          * First class check. We do this again in FullConnect after DNS is done, and NICK/USER is recieved.
 776          * See my note down there for why this is required. DO NOT REMOVE. :) -- w00t
 777          */
 778         ConnectClass* i = New->GetClass();
 779
 780         if (!i)
 781         {
 782                 User::QuitUser(Instance, New, "Access denied by configuration");
 783                 return;
 784         }
 785
 786         /*
 787          * Check connect class settings and initialise settings into User.
 788          * This will be done again after DNS resolution. -- w00t
 789          */
 790         New->CheckClass();
 791
 792         Instance->local_users.push_back(New);
 793
 794         if ((Instance->local_users.size() > Instance->Config->SoftLimit) || (Instance->local_users.size() >= MAXCLIENTS))
 795         {
 796                 Instance->WriteOpers("*** Warning: softlimit value has been reached: %d clients", Instance->Config->SoftLimit);
 797                 User::QuitUser(Instance, New,"No more connections allowed");
 798                 return;
 799         }
 800
 801         /*
 802          * XXX -
 803          * this is done as a safety check to keep the file descriptors within range of fd_ref_table.
 804          * its a pretty big but for the moment valid assumption:
 805          * file descriptors are handed out starting at 0, and are recycled as theyre freed.
 806          * therefore if there is ever an fd over 65535, 65536 clients must be connected to the
 807          * irc server at once (or the irc server otherwise initiating this many connections, files etc)
 808          * which for the time being is a physical impossibility (even the largest networks dont have more
 809          * than about 10,000 users on ONE server!)
 810          */
 811 #ifndef WINDOWS
 812         if ((unsigned int)socket >= MAX_DESCRIPTORS)
 813         {
 814                 User::QuitUser(Instance, New, "Server is full");
 815                 return;
 816         }
 817 #endif
 818
 819         New->exempt = (Instance->XLines->matches_exception(New) != NULL);
 820         if (!New->exempt)
 821         {
 822                 ZLine* r = Instance->XLines->matches_zline(ipaddr);
 823                 if (r)
 824                 {
 825                         char reason[MAXBUF];
 826                         if (*Instance->Config->MoronBanner)
 827                                 New->WriteServ("NOTICE %s :*** %s", New->nick, Instance->Config->MoronBanner);
 828                         snprintf(reason,MAXBUF,"Z-Lined: %s",r->reason);
 829                         User::QuitUser(Instance, New, reason);
 830                         return;
 831                 }
 832         }
 833
 834         if (socket > -1)
 835         {
 836                 if (!Instance->SE->AddFd(New))
 837                 {
 838                         User::QuitUser(Instance, New, "Internal error handling connection");
 839                 }
 840         }
 841
 842         /* NOTE: even if dns lookups are *off*, we still need to display this.
 843          * BOPM and other stuff requires it.
 844          */
 845         New->WriteServ("NOTICE Auth :*** Looking up your hostname...");
 846 }
 847
 848 unsigned long User::GlobalCloneCount()
 849 {
 850         clonemap::iterator x = ServerInstance->global_clones.find(this->GetIPString());
 851         if (x != ServerInstance->global_clones.end())
 852                 return x->second;
 853         else
 854                 return 0;
 855 }
 856
 857 unsigned long User::LocalCloneCount()
 858 {
 859         clonemap::iterator x = ServerInstance->local_clones.find(this->GetIPString());
 860         if (x != ServerInstance->local_clones.end())
 861                 return x->second;
 862         else
 863                 return 0;
 864 }
 865
 866 /*
 867  * Check class restrictions
 868  */
 869 void User::CheckClass(const std::string &explicit_class)
 870 {
 871         ConnectClass* a = this->GetClass(explicit_class);
 872
 873         if ((!a) || (a->GetType() == CC_DENY))
 874         {
 875                 User::QuitUser(ServerInstance, this, "Unauthorised connection");
 876                 return;
 877         }
 878         else if ((a->GetMaxLocal()) && (this->LocalCloneCount() > a->GetMaxLocal()))
 879         {
 880                 User::QuitUser(ServerInstance, this, "No more connections allowed from your host via this connect class (local)");
 881                 ServerInstance->WriteOpers("*** WARNING: maximum LOCAL connections (%ld) exceeded for IP %s", a->GetMaxLocal(), this->GetIPString());
 882                 return;
 883         }
 884         else if ((a->GetMaxGlobal()) && (this->GlobalCloneCount() > a->GetMaxGlobal()))
 885         {
 886                 User::QuitUser(ServerInstance, this, "No more connections allowed from your host via this connect class (global)");
 887                 ServerInstance->WriteOpers("*** WARNING: maximum GLOBAL connections (%ld) exceeded for IP %s", a->GetMaxGlobal(), this->GetIPString());
 888                 return;
 889         }
 890
 891         this->pingmax = a->GetPingTime();
 892         this->nping = ServerInstance->Time() + a->GetPingTime() + ServerInstance->Config->dns_timeout;
 893         this->timeout = ServerInstance->Time() + a->GetRegTimeout();
 894         this->flood = a->GetFlood();
 895         this->threshold = a->GetThreshold();
 896         this->sendqmax = a->GetSendqMax();
 897         this->recvqmax = a->GetRecvqMax();
 898         this->MaxChans = a->GetMaxChans();
 899 }
 900
 901 void User::FullConnect()
 902 {
 903         ServerInstance->stats->statsConnects++;
 904         this->idle_lastmsg = ServerInstance->Time();
 905
 906         /*
 907          * You may be thinking "wtf, we checked this in User::AddClient!" - and yes, we did, BUT.
 908          * At the time AddClient is called, we don't have a resolved host, by here we probably do - which
 909          * may put the user into a totally seperate class with different restrictions! so we *must* check again.
 910          * Don't remove this! -- w00t
 911          */
 912         this->CheckClass();
 913
 914         /* Check the password, if one is required by the user's connect class.
 915          * This CANNOT be in CheckClass(), because that is called prior to PASS as well!
 916          */
 917         if ((!this->GetClass()->GetPass().empty()) && (!this->haspassed))
 918         {
 919                 User::QuitUser(ServerInstance, this, "Invalid password");
 920                 return;
 921         }
 922
 923         if (!this->exempt)
 924         {
 925                 GLine* r = ServerInstance->XLines->matches_gline(this);
 926
 927                 if (r)
 928                 {
 929                         this->muted = true;
 930                         char reason[MAXBUF];
 931                         if (*ServerInstance->Config->MoronBanner)
 932                                 this->WriteServ("NOTICE %s :*** %s", this->nick, ServerInstance->Config->MoronBanner);
 933                         snprintf(reason,MAXBUF,"G-Lined: %s",r->reason);
 934                         User::QuitUser(ServerInstance, this, reason);
 935                         return;
 936                 }
 937
 938                 KLine* n = ServerInstance->XLines->matches_kline(this);
 939
 940                 if (n)
 941                 {
 942                         this->muted = true;
 943                         char reason[MAXBUF];
 944                         if (*ServerInstance->Config->MoronBanner)
 945                                 this->WriteServ("NOTICE %s :*** %s", this, ServerInstance->Config->MoronBanner);
 946                         snprintf(reason,MAXBUF,"K-Lined: %s",n->reason);
 947                         User::QuitUser(ServerInstance, this, reason);
 948                         return;
 949                 }
 950         }
 951
 952         this->WriteServ("NOTICE Auth :Welcome to \002%s\002!",ServerInstance->Config->Network);
 953         this->WriteServ("001 %s :Welcome to the %s IRC Network %s!%s@%s",this->nick, ServerInstance->Config->Network, this->nick, this->ident, this->host);
 954         this->WriteServ("002 %s :Your host is %s, running version %s",this->nick,ServerInstance->Config->ServerName,VERSION);
 955         this->WriteServ("003 %s :This server was created %s %s", this->nick, __TIME__, __DATE__);
 956         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());
 957
 958         ServerInstance->Config->Send005(this);
 959
 960         this->WriteServ("042 %s %s :your unique ID", this->nick, this->uuid);
 961
 962
 963         this->ShowMOTD();
 964
 965         /* Now registered */
 966         if (ServerInstance->unregistered_count)
 967                 ServerInstance->unregistered_count--;
 968
 969         /* Trigger LUSERS output, give modules a chance too */
 970         int MOD_RESULT = 0;
 971         FOREACH_RESULT(I_OnPreCommand, OnPreCommand("LUSERS", NULL, 0, this, true, "LUSERS"));
 972         if (!MOD_RESULT)
 973                 ServerInstance->CallCommandHandler("LUSERS", NULL, 0, this);
 974
 975         /*
 976          * We don't set REG_ALL until triggering OnUserConnect, so some module events don't spew out stuff
 977          * for a user that doesn't exist yet.
 978          */
 979         FOREACH_MOD(I_OnUserConnect,OnUserConnect(this));
 980
 981         this->registered = REG_ALL;
 982
 983         FOREACH_MOD(I_OnPostConnect,OnPostConnect(this));
 984
 985         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);
 986 }
 987
 988 /** User::UpdateNick()
 989  * re-allocates a nick in the user_hash after they change nicknames,
 990  * returns a pointer to the new user as it may have moved
 991  */
 992 User* User::UpdateNickHash(const char* New)
 993 {
 994         try
 995         {
 996                 //user_hash::iterator newnick;
 997                 user_hash::iterator oldnick = ServerInstance->clientlist->find(this->nick);
 998
 999                 if (!strcasecmp(this->nick,New))
1000                         return oldnick->second;
1001
1002                 if (oldnick == ServerInstance->clientlist->end())
1003                         return NULL; /* doesnt exist */
1004
1005                 User* olduser = oldnick->second;
1006                 (*(ServerInstance->clientlist))[New] = olduser;
1007                 ServerInstance->clientlist->erase(oldnick);
1008                 return olduser;
1009         }
1010
1011         catch (...)
1012         {
1013                 ServerInstance->Log(DEBUG,"Exception in User::UpdateNickHash()");
1014                 return NULL;
1015         }
1016 }
1017
1018 void User::InvalidateCache()
1019 {
1020         /* Invalidate cache */
1021         if (cached_fullhost)
1022                 free(cached_fullhost);
1023         if (cached_hostip)
1024                 free(cached_hostip);
1025         if (cached_makehost)
1026                 free(cached_makehost);
1027         if (cached_fullrealhost)
1028                 free(cached_fullrealhost);
1029         cached_fullhost = cached_hostip = cached_makehost = cached_fullrealhost = NULL;
1030 }
1031
1032 bool User::ForceNickChange(const char* newnick)
1033 {
1034         try
1035         {
1036                 int MOD_RESULT = 0;
1037
1038                 this->InvalidateCache();
1039
1040                 FOREACH_RESULT(I_OnUserPreNick,OnUserPreNick(this, newnick));
1041
1042                 if (MOD_RESULT)
1043                 {
1044                         ServerInstance->stats->statsCollisions++;
1045                         return false;
1046                 }
1047
1048                 if (ServerInstance->XLines->matches_qline(newnick))
1049                 {
1050                         ServerInstance->stats->statsCollisions++;
1051                         return false;
1052                 }
1053
1054                 if (this->registered == REG_ALL)
1055                 {
1056                         std::deque<classbase*> dummy;
1057                         Command* nickhandler = ServerInstance->Parser->GetHandler("NICK");
1058                         if (nickhandler)
1059                         {
1060                                 nickhandler->HandleInternal(1, dummy);
1061                                 bool result = (ServerInstance->Parser->CallHandler("NICK", &newnick, 1, this) == CMD_SUCCESS);
1062                                 nickhandler->HandleInternal(0, dummy);
1063                                 return result;
1064                         }
1065                 }
1066                 return false;
1067         }
1068
1069         catch (...)
1070         {
1071                 ServerInstance->Log(DEBUG,"Exception in User::ForceNickChange()");
1072                 return false;
1073         }
1074 }
1075
1076 void User::SetSockAddr(int protocol_family, const char* ip, int port)
1077 {
1078         switch (protocol_family)
1079         {
1080 #ifdef SUPPORT_IP6LINKS
1081                 case AF_INET6:
1082                 {
1083                         sockaddr_in6* sin = new sockaddr_in6;
1084                         sin->sin6_family = AF_INET6;
1085                         sin->sin6_port = port;
1086                         inet_pton(AF_INET6, ip, &sin->sin6_addr);
1087                         this->ip = (sockaddr*)sin;
1088                 }
1089                 break;
1090 #endif
1091                 case AF_INET:
1092                 {
1093                         sockaddr_in* sin = new sockaddr_in;
1094                         sin->sin_family = AF_INET;
1095                         sin->sin_port = port;
1096                         inet_pton(AF_INET, ip, &sin->sin_addr);
1097                         this->ip = (sockaddr*)sin;
1098                 }
1099                 break;
1100                 default:
1101                         ServerInstance->Log(DEBUG,"Uh oh, I dont know protocol %d to be set on '%s'!", protocol_family, this->nick);
1102                 break;
1103         }
1104 }
1105
1106 int User::GetPort()
1107 {
1108         if (this->ip == NULL)
1109                 return 0;
1110
1111         switch (this->GetProtocolFamily())
1112         {
1113 #ifdef SUPPORT_IP6LINKS
1114                 case AF_INET6:
1115                 {
1116                         sockaddr_in6* sin = (sockaddr_in6*)this->ip;
1117                         return sin->sin6_port;
1118                 }
1119                 break;
1120 #endif
1121                 case AF_INET:
1122                 {
1123                         sockaddr_in* sin = (sockaddr_in*)this->ip;
1124                         return sin->sin_port;
1125                 }
1126                 break;
1127                 default:
1128                 break;
1129         }
1130         return 0;
1131 }
1132
1133 int User::GetProtocolFamily()
1134 {
1135         if (this->ip == NULL)
1136                 return 0;
1137
1138         sockaddr_in* sin = (sockaddr_in*)this->ip;
1139         return sin->sin_family;
1140 }
1141
1142 /*
1143  * XXX the duplication here is horrid..
1144  * do we really need two methods doing essentially the same thing?
1145  */
1146 const char* User::GetIPString()
1147 {
1148         static char buf[1024];
1149
1150         if (this->ip == NULL)
1151                 return "";
1152
1153         switch (this->GetProtocolFamily())
1154         {
1155 #ifdef SUPPORT_IP6LINKS
1156                 case AF_INET6:
1157                 {
1158                         static char temp[1024];
1159
1160                         sockaddr_in6* sin = (sockaddr_in6*)this->ip;
1161                         inet_ntop(sin->sin6_family, &sin->sin6_addr, buf, sizeof(buf));
1162                         /* IP addresses starting with a : on irc are a Bad Thing (tm) */
1163                         if (*buf == ':')
1164                         {
1165                                 strlcpy(&temp[1], buf, sizeof(temp) - 1);
1166                                 *temp = '0';
1167                                 return temp;
1168                         }
1169                         return buf;
1170                 }
1171                 break;
1172 #endif
1173                 case AF_INET:
1174                 {
1175                         sockaddr_in* sin = (sockaddr_in*)this->ip;
1176                         inet_ntop(sin->sin_family, &sin->sin_addr, buf, sizeof(buf));
1177                         return buf;
1178                 }
1179                 break;
1180                 default:
1181                 break;
1182         }
1183         return "";
1184 }
1185
1186 /** NOTE: We cannot pass a const reference to this method.
1187  * The string is changed by the workings of the method,
1188  * so that if we pass const ref, we end up copying it to
1189  * something we can change anyway. Makes sense to just let
1190  * the compiler do that copy for us.
1191  */
1192 void User::Write(std::string text)
1193 {
1194         if (!ServerInstance->SE->BoundsCheckFd(this))
1195                 return;
1196
1197         try
1198         {
1199                 /* ServerInstance->Log(DEBUG,"C[%d] O %s", this->GetFd(), text.c_str());
1200                  * WARNING: The above debug line is VERY loud, do NOT
1201                  * enable it till we have a good way of filtering it
1202                  * out of the logs (e.g. 1.2 would be good).
1203                  */
1204                 text.append("\r\n");
1205         }
1206         catch (...)
1207         {
1208                 ServerInstance->Log(DEBUG,"Exception in User::Write() std::string::append");
1209                 return;
1210         }
1211
1212         if (ServerInstance->Config->GetIOHook(this->GetPort()))
1213         {
1214                 try
1215                 {
1216                         /* XXX: The lack of buffering here is NOT a bug, modules implementing this interface have to
1217                          * implement their own buffering mechanisms
1218                          */
1219                         ServerInstance->Config->GetIOHook(this->GetPort())->OnRawSocketWrite(this->fd, text.data(), text.length());
1220                 }
1221                 catch (CoreException& modexcept)
1222                 {
1223                         ServerInstance->Log(DEBUG, "%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
1224                 }
1225         }
1226         else
1227         {
1228                 this->AddWriteBuf(text);
1229         }
1230         ServerInstance->stats->statsSent += text.length();
1231         this->ServerInstance->SE->WantWrite(this);
1232 }
1233
1234 /** Write()
1235  */
1236 void User::Write(const char *text, ...)
1237 {
1238         va_list argsPtr;
1239         char textbuffer[MAXBUF];
1240
1241         va_start(argsPtr, text);
1242         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1243         va_end(argsPtr);
1244
1245         this->Write(std::string(textbuffer));
1246 }
1247
1248 void User::WriteServ(const std::string& text)
1249 {
1250         char textbuffer[MAXBUF];
1251
1252         snprintf(textbuffer,MAXBUF,":%s %s",ServerInstance->Config->ServerName,text.c_str());
1253         this->Write(std::string(textbuffer));
1254 }
1255
1256 /** WriteServ()
1257  *  Same as Write(), except `text' is prefixed with `:server.name '.
1258  */
1259 void User::WriteServ(const char* text, ...)
1260 {
1261         va_list argsPtr;
1262         char textbuffer[MAXBUF];
1263
1264         va_start(argsPtr, text);
1265         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1266         va_end(argsPtr);
1267
1268         this->WriteServ(std::string(textbuffer));
1269 }
1270
1271
1272 void User::WriteFrom(User *user, const std::string &text)
1273 {
1274         char tb[MAXBUF];
1275
1276         snprintf(tb,MAXBUF,":%s %s",user->GetFullHost(),text.c_str());
1277
1278         this->Write(std::string(tb));
1279 }
1280
1281
1282 /* write text from an originating user to originating user */
1283
1284 void User::WriteFrom(User *user, const char* text, ...)
1285 {
1286         va_list argsPtr;
1287         char textbuffer[MAXBUF];
1288
1289         va_start(argsPtr, text);
1290         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1291         va_end(argsPtr);
1292
1293         this->WriteFrom(user, std::string(textbuffer));
1294 }
1295
1296
1297 /* write text to an destination user from a source user (e.g. user privmsg) */
1298
1299 void User::WriteTo(User *dest, const char *data, ...)
1300 {
1301         char textbuffer[MAXBUF];
1302         va_list argsPtr;
1303
1304         va_start(argsPtr, data);
1305         vsnprintf(textbuffer, MAXBUF, data, argsPtr);
1306         va_end(argsPtr);
1307
1308         this->WriteTo(dest, std::string(textbuffer));
1309 }
1310
1311 void User::WriteTo(User *dest, const std::string &data)
1312 {
1313         dest->WriteFrom(this, data);
1314 }
1315
1316
1317 void User::WriteCommon(const char* text, ...)
1318 {
1319         char textbuffer[MAXBUF];
1320         va_list argsPtr;
1321
1322         if (this->registered != REG_ALL)
1323                 return;
1324
1325         va_start(argsPtr, text);
1326         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1327         va_end(argsPtr);
1328
1329         this->WriteCommon(std::string(textbuffer));
1330 }
1331
1332 void User::WriteCommon(const std::string &text)
1333 {
1334         try
1335         {
1336                 bool sent_to_at_least_one = false;
1337                 char tb[MAXBUF];
1338
1339                 if (this->registered != REG_ALL)
1340                         return;
1341
1342                 uniq_id++;
1343
1344                 /* We dont want to be doing this n times, just once */
1345                 snprintf(tb,MAXBUF,":%s %s",this->GetFullHost(),text.c_str());
1346                 std::string out = tb;
1347
1348                 for (UCListIter v = this->chans.begin(); v != this->chans.end(); v++)
1349                 {
1350                         CUList* ulist = v->first->GetUsers();
1351                         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1352                         {
1353                                 if ((IS_LOCAL(i->first)) && (already_sent[i->first->fd] != uniq_id))
1354                                 {
1355                                         already_sent[i->first->fd] = uniq_id;
1356                                         i->first->Write(out);
1357                                         sent_to_at_least_one = true;
1358                                 }
1359                         }
1360                 }
1361
1362                 /*
1363                  * if the user was not in any channels, no users will receive the text. Make sure the user
1364                  * receives their OWN message for WriteCommon
1365                  */
1366                 if (!sent_to_at_least_one)
1367                 {
1368                         this->Write(std::string(tb));
1369                 }
1370         }
1371
1372         catch (...)
1373         {
1374                 ServerInstance->Log(DEBUG,"Exception in User::WriteCommon()");
1375         }
1376 }
1377
1378
1379 /* write a formatted string to all users who share at least one common
1380  * channel, NOT including the source user e.g. for use in QUIT
1381  */
1382
1383 void User::WriteCommonExcept(const char* text, ...)
1384 {
1385         char textbuffer[MAXBUF];
1386         va_list argsPtr;
1387
1388         va_start(argsPtr, text);
1389         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1390         va_end(argsPtr);
1391
1392         this->WriteCommonExcept(std::string(textbuffer));
1393 }
1394
1395 void User::WriteCommonQuit(const std::string &normal_text, const std::string &oper_text)
1396 {
1397         char tb1[MAXBUF];
1398         char tb2[MAXBUF];
1399
1400         if (this->registered != REG_ALL)
1401                 return;
1402
1403         uniq_id++;
1404         snprintf(tb1,MAXBUF,":%s QUIT :%s",this->GetFullHost(),normal_text.c_str());
1405         snprintf(tb2,MAXBUF,":%s QUIT :%s",this->GetFullHost(),oper_text.c_str());
1406         std::string out1 = tb1;
1407         std::string out2 = tb2;
1408
1409         for (UCListIter v = this->chans.begin(); v != this->chans.end(); v++)
1410         {
1411                 CUList *ulist = v->first->GetUsers();
1412                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1413                 {
1414                         if (this != i->first)
1415                         {
1416                                 if ((IS_LOCAL(i->first)) && (already_sent[i->first->fd] != uniq_id))
1417                                 {
1418                                         already_sent[i->first->fd] = uniq_id;
1419                                         i->first->Write(IS_OPER(i->first) ? out2 : out1);
1420                                 }
1421                         }
1422                 }
1423         }
1424 }
1425
1426 void User::WriteCommonExcept(const std::string &text)
1427 {
1428         char tb1[MAXBUF];
1429         std::string out1;
1430
1431         if (this->registered != REG_ALL)
1432                 return;
1433
1434         uniq_id++;
1435         snprintf(tb1,MAXBUF,":%s %s",this->GetFullHost(),text.c_str());
1436         out1 = tb1;
1437
1438         for (UCListIter v = this->chans.begin(); v != this->chans.end(); v++)
1439         {
1440                 CUList *ulist = v->first->GetUsers();
1441                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1442                 {
1443                         if (this != i->first)
1444                         {
1445                                 if ((IS_LOCAL(i->first)) && (already_sent[i->first->fd] != uniq_id))
1446                                 {
1447                                         already_sent[i->first->fd] = uniq_id;
1448                                         i->first->Write(out1);
1449                                 }
1450                         }
1451                 }
1452         }
1453
1454 }
1455
1456 void User::WriteWallOps(const std::string &text)
1457 {
1458         if (!IS_OPER(this) && IS_LOCAL(this))
1459                 return;
1460
1461         std::string wallop("WALLOPS :");
1462         wallop.append(text);
1463
1464         for (std::vector<User*>::const_iterator i = ServerInstance->local_users.begin(); i != ServerInstance->local_users.end(); i++)
1465         {
1466                 User* t = *i;
1467                 if (t->IsModeSet('w'))
1468                         this->WriteTo(t,wallop);
1469         }
1470 }
1471
1472 void User::WriteWallOps(const char* text, ...)
1473 {
1474         char textbuffer[MAXBUF];
1475         va_list argsPtr;
1476
1477         va_start(argsPtr, text);
1478         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1479         va_end(argsPtr);
1480
1481         this->WriteWallOps(std::string(textbuffer));
1482 }
1483
1484 /* return 0 or 1 depending if users u and u2 share one or more common channels
1485  * (used by QUIT, NICK etc which arent channel specific notices)
1486  *
1487  * The old algorithm in 1.0 for this was relatively inefficient, iterating over
1488  * the first users channels then the second users channels within the outer loop,
1489  * therefore it was a maximum of x*y iterations (upon returning 0 and checking
1490  * all possible iterations). However this new function instead checks against the
1491  * channel's userlist in the inner loop which is a std::map<User*,User*>
1492  * and saves us time as we already know what pointer value we are after.
1493  * Don't quote me on the maths as i am not a mathematician or computer scientist,
1494  * but i believe this algorithm is now x+(log y) maximum iterations instead.
1495  */
1496 bool User::SharesChannelWith(User *other)
1497 {
1498         if ((!other) || (this->registered != REG_ALL) || (other->registered != REG_ALL))
1499                 return false;
1500
1501         /* Outer loop */
1502         for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1503         {
1504                 /* Eliminate the inner loop (which used to be ~equal in size to the outer loop)
1505                  * by replacing it with a map::find which *should* be more efficient
1506                  */
1507                 if (i->first->HasUser(other))
1508                         return true;
1509         }
1510         return false;
1511 }
1512
1513 bool User::ChangeName(const char* gecos)
1514 {
1515         if (!strcmp(gecos, this->fullname))
1516                 return true;
1517
1518         if (IS_LOCAL(this))
1519         {
1520                 int MOD_RESULT = 0;
1521                 FOREACH_RESULT(I_OnChangeLocalUserGECOS,OnChangeLocalUserGECOS(this,gecos));
1522                 if (MOD_RESULT)
1523                         return false;
1524                 FOREACH_MOD(I_OnChangeName,OnChangeName(this,gecos));
1525         }
1526         strlcpy(this->fullname,gecos,MAXGECOS+1);
1527
1528         return true;
1529 }
1530
1531 bool User::ChangeDisplayedHost(const char* host)
1532 {
1533         if (!strcmp(host, this->dhost))
1534                 return true;
1535
1536         if (IS_LOCAL(this))
1537         {
1538                 int MOD_RESULT = 0;
1539                 FOREACH_RESULT(I_OnChangeLocalUserHost,OnChangeLocalUserHost(this,host));
1540                 if (MOD_RESULT)
1541                         return false;
1542                 FOREACH_MOD(I_OnChangeHost,OnChangeHost(this,host));
1543         }
1544         if (this->ServerInstance->Config->CycleHosts)
1545                 this->WriteCommonExcept("QUIT :Changing hosts");
1546
1547         /* Fix by Om: User::dhost is 65 long, this was truncating some long hosts */
1548         strlcpy(this->dhost,host,64);
1549
1550         this->InvalidateCache();
1551
1552         if (this->ServerInstance->Config->CycleHosts)
1553         {
1554                 for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1555                 {
1556                         i->first->WriteAllExceptSender(this, false, 0, "JOIN %s", i->first->name);
1557                         std::string n = this->ServerInstance->Modes->ModeString(this, i->first);
1558                         if (n.length() > 0)
1559                                 i->first->WriteAllExceptSender(this, true, 0, "MODE %s +%s", i->first->name, n.c_str());
1560                 }
1561         }
1562
1563         if (IS_LOCAL(this))
1564                 this->WriteServ("396 %s %s :is now your displayed host",this->nick,this->dhost);
1565
1566         return true;
1567 }
1568
1569 bool User::ChangeIdent(const char* newident)
1570 {
1571         if (!strcmp(newident, this->ident))
1572                 return true;
1573
1574         if (this->ServerInstance->Config->CycleHosts)
1575                 this->WriteCommonExcept("%s","QUIT :Changing ident");
1576
1577         strlcpy(this->ident, newident, IDENTMAX+2);
1578
1579         this->InvalidateCache();
1580
1581         if (this->ServerInstance->Config->CycleHosts)
1582         {
1583                 for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1584                 {
1585                         i->first->WriteAllExceptSender(this, false, 0, "JOIN %s", i->first->name);
1586                         std::string n = this->ServerInstance->Modes->ModeString(this, i->first);
1587                         if (n.length() > 0)
1588                                 i->first->WriteAllExceptSender(this, true, 0, "MODE %s +%s", i->first->name, n.c_str());
1589                 }
1590         }
1591
1592         return true;
1593 }
1594
1595 void User::SendAll(const char* command, char* text, ...)
1596 {
1597         char textbuffer[MAXBUF];
1598         char formatbuffer[MAXBUF];
1599         va_list argsPtr;
1600
1601         va_start(argsPtr, text);
1602         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1603         va_end(argsPtr);
1604
1605         snprintf(formatbuffer,MAXBUF,":%s %s $* :%s", this->GetFullHost(), command, textbuffer);
1606         std::string fmt = formatbuffer;
1607
1608         for (std::vector<User*>::const_iterator i = ServerInstance->local_users.begin(); i != ServerInstance->local_users.end(); i++)
1609         {
1610                 (*i)->Write(fmt);
1611         }
1612 }
1613
1614
1615 std::string User::ChannelList(User* source)
1616 {
1617         try
1618         {
1619                 std::string list;
1620                 for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1621                 {
1622                         /* If the target is the same as the sender, let them see all their channels.
1623                          * If the channel is NOT private/secret OR the user shares a common channel
1624                          * If the user is an oper, and the <options:operspywhois> option is set.
1625                          */
1626                         if ((source == this) || (IS_OPER(source) && ServerInstance->Config->OperSpyWhois) || (((!i->first->IsModeSet('p')) && (!i->first->IsModeSet('s'))) || (i->first->HasUser(source))))
1627                         {
1628                                 list.append(i->first->GetPrefixChar(this)).append(i->first->name).append(" ");
1629                         }
1630                 }
1631                 return list;
1632         }
1633         catch (...)
1634         {
1635                 ServerInstance->Log(DEBUG,"Exception in User::ChannelList()");
1636                 return "";
1637         }
1638 }
1639
1640 void User::SplitChanList(User* dest, const std::string &cl)
1641 {
1642         std::string line;
1643         std::ostringstream prefix;
1644         std::string::size_type start, pos, length;
1645
1646         try
1647         {
1648                 prefix << this->nick << " " << dest->nick << " :";
1649                 line = prefix.str();
1650                 int namelen = strlen(ServerInstance->Config->ServerName) + 6;
1651
1652                 for (start = 0; (pos = cl.find(' ', start)) != std::string::npos; start = pos+1)
1653                 {
1654                         length = (pos == std::string::npos) ? cl.length() : pos;
1655
1656                         if (line.length() + namelen + length - start > 510)
1657                         {
1658                                 ServerInstance->SendWhoisLine(this, dest, 319, "%s", line.c_str());
1659                                 line = prefix.str();
1660                         }
1661
1662                         if(pos == std::string::npos)
1663                         {
1664                                 line.append(cl.substr(start, length - start));
1665                                 break;
1666                         }
1667                         else
1668                         {
1669                                 line.append(cl.substr(start, length - start + 1));
1670                         }
1671                 }
1672
1673                 if (line.length())
1674                 {
1675                         ServerInstance->SendWhoisLine(this, dest, 319, "%s", line.c_str());
1676                 }
1677         }
1678
1679         catch (...)
1680         {
1681                 ServerInstance->Log(DEBUG,"Exception in User::SplitChanList()");
1682         }
1683 }
1684
1685 unsigned int User::GetMaxChans()
1686 {
1687         return this->MaxChans;
1688 }
1689
1690 /* looks up a users password for their connection class (<ALLOW>/<DENY> tags)
1691  * NOTE: If the <ALLOW> or <DENY> tag specifies an ip, and this user resolves,
1692  * then their ip will be taken as 'priority' anyway, so for example,
1693  * <connect allow="127.0.0.1"> will match joe!bloggs@localhost
1694  */
1695 ConnectClass* User::GetClass(const std::string &explicit_name)
1696 {
1697         if (!explicit_name.empty())
1698         {
1699                 for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++)
1700                 {
1701                         if (explicit_name == i->GetName())
1702                                 return &(*i);
1703                 }
1704         }
1705         else
1706         {
1707                 for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++)
1708                 {
1709                         if (((match(this->GetIPString(),i->GetHost().c_str(),true)) || (match(this->host,i->GetHost().c_str()))))
1710                         {
1711                                 if (i->GetPort())
1712                                 {
1713                                         if (this->GetPort() == i->GetPort())
1714                                                 return &(*i);
1715                                         else
1716                                                 continue;
1717                                 }
1718                                 else
1719                                         return &(*i);
1720                         }
1721                 }
1722         }
1723         return NULL;
1724 }
1725
1726 void User::PurgeEmptyChannels()
1727 {
1728         std::vector<Channel*> to_delete;
1729
1730         // firstly decrement the count on each channel
1731         for (UCListIter f = this->chans.begin(); f != this->chans.end(); f++)
1732         {
1733                 f->first->RemoveAllPrefixes(this);
1734                 if (f->first->DelUser(this) == 0)
1735                 {
1736                         /* No users left in here, mark it for deletion */
1737                         try
1738                         {
1739                                 to_delete.push_back(f->first);
1740                         }
1741                         catch (...)
1742                         {
1743                                 ServerInstance->Log(DEBUG,"Exception in User::PurgeEmptyChannels to_delete.push_back()");
1744                         }
1745                 }
1746         }
1747
1748         for (std::vector<Channel*>::iterator n = to_delete.begin(); n != to_delete.end(); n++)
1749         {
1750                 Channel* thischan = *n;
1751                 chan_hash::iterator i2 = ServerInstance->chanlist->find(thischan->name);
1752                 if (i2 != ServerInstance->chanlist->end())
1753                 {
1754                         FOREACH_MOD(I_OnChannelDelete,OnChannelDelete(i2->second));
1755                         DELETE(i2->second);
1756                         ServerInstance->chanlist->erase(i2);
1757                         this->chans.erase(*n);
1758                 }
1759         }
1760
1761         this->UnOper();
1762 }
1763
1764 void User::ShowMOTD()
1765 {
1766         if (!ServerInstance->Config->MOTD.size())
1767         {
1768                 this->WriteServ("422 %s :Message of the day file is missing.",this->nick);
1769                 return;
1770         }
1771         this->WriteServ("375 %s :%s message of the day", this->nick, ServerInstance->Config->ServerName);
1772
1773         for (file_cache::iterator i = ServerInstance->Config->MOTD.begin(); i != ServerInstance->Config->MOTD.end(); i++)
1774                 this->WriteServ("372 %s :- %s",this->nick,i->c_str());
1775
1776         this->WriteServ("376 %s :End of message of the day.", this->nick);
1777 }
1778
1779 void User::ShowRULES()
1780 {
1781         if (!ServerInstance->Config->RULES.size())
1782         {
1783                 this->WriteServ("434 %s :RULES File is missing",this->nick);
1784                 return;
1785         }
1786
1787         this->WriteServ("308 %s :- %s Server Rules -",this->nick,ServerInstance->Config->ServerName);
1788
1789         for (file_cache::iterator i = ServerInstance->Config->RULES.begin(); i != ServerInstance->Config->RULES.end(); i++)
1790                 this->WriteServ("232 %s :- %s",this->nick,i->c_str());
1791
1792         this->WriteServ("309 %s :End of RULES command.",this->nick);
1793 }
1794
1795 void User::HandleEvent(EventType et, int errornum)
1796 {
1797         /* WARNING: May delete this user! */
1798         int thisfd = this->GetFd();
1799
1800         try
1801         {
1802                 switch (et)
1803                 {
1804                         case EVENT_READ:
1805                                 ServerInstance->ProcessUser(this);
1806                         break;
1807                         case EVENT_WRITE:
1808                                 this->FlushWriteBuf();
1809                         break;
1810                         case EVENT_ERROR:
1811                                 /** This should be safe, but dont DARE do anything after it -- Brain */
1812                                 this->SetWriteError(errornum ? strerror(errornum) : "EOF from client");
1813                         break;
1814                 }
1815         }
1816         catch (...)
1817         {
1818                 ServerInstance->Log(DEBUG,"Exception in User::HandleEvent intercepted");
1819         }
1820
1821         /* If the user has raised an error whilst being processed, quit them now we're safe to */
1822         if ((ServerInstance->SE->GetRef(thisfd) == this))
1823         {
1824                 if (!WriteError.empty())
1825                 {
1826                         User::QuitUser(ServerInstance, this, GetWriteError());
1827                 }
1828         }
1829 }
1830
1831 void User::SetOperQuit(const std::string &oquit)
1832 {
1833         if (operquit)
1834                 return;
1835
1836         operquit = strdup(oquit.c_str());
1837 }
1838
1839 const char* User::GetOperQuit()
1840 {
1841         return operquit ? operquit : "";
1842 }
1843
1844 VisData::VisData()
1845 {
1846 }
1847
1848 VisData::~VisData()
1849 {
1850 }
1851
1852 bool VisData::VisibleTo(User* user)
1853 {
1854         return true;
1855 }
1856