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