src/users.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2007 InspIRCd Development Team
   6  * See: http://www.inspircd.org/wiki/index.php/Credits
   7  *
   8  * This program is free but copyrighted software; see
   9  *            the file COPYING for details.
  10  *
  11  * ---------------------------------------------------
  12  */
  13
  14 /* $Core: libIRCDusers */
  15
  16 #include "inspircd.h"
  17 #include <stdarg.h>
  18 #include "socketengine.h"
  19 #include "wildcard.h"
  20 #include "xline.h"
  21 #include "bancache.h"
  22 #include "commands/cmd_whowas.h"
  23
  24 static unsigned long already_sent[MAX_DESCRIPTORS] = {0};
  25
  26 /* XXX: Used for speeding up WriteCommon operations */
  27 unsigned long uniq_id = 0;
  28
  29 std::string User::ProcessNoticeMasks(const char *sm)
  30 {
  31         bool adding = true, oldadding = false;
  32         const char *c = sm;
  33         std::string output;
  34
  35         while (c && *c)
  36         {
  37                 switch (*c)
  38                 {
  39                         case '+':
  40                                 adding = true;
  41                         break;
  42                         case '-':
  43                                 adding = false;
  44                         break;
  45                         case '*':
  46                                 for (unsigned char d = 'A'; d <= 'z'; d++)
  47                                 {
  48                                         if (ServerInstance->SNO->IsEnabled(d))
  49                                         {
  50                                                 if ((!IsNoticeMaskSet(d) && adding) || (IsNoticeMaskSet(d) && !adding))
  51                                                 {
  52                                                         if ((oldadding != adding) || (!output.length()))
  53                                                                 output += (adding ? '+' : '-');
  54
  55                                                         this->SetNoticeMask(d, adding);
  56
  57                                                         output += d;
  58                                                 }
  59                                         }
  60                                         oldadding = adding;
  61                                 }
  62                         break;
  63                         default:
  64                                 if ((*c >= 'A') && (*c <= 'z') && (ServerInstance->SNO->IsEnabled(*c)))
  65                                 {
  66                                         if ((!IsNoticeMaskSet(*c) && adding) || (IsNoticeMaskSet(*c) && !adding))
  67                                         {
  68                                                 if ((oldadding != adding) || (!output.length()))
  69                                                         output += (adding ? '+' : '-');
  70
  71                                                 this->SetNoticeMask(*c, adding);
  72
  73                                                 output += *c;
  74                                         }
  75                                 }
  76                                 oldadding = adding;
  77                         break;
  78                 }
  79
  80                 *c++;
  81         }
  82
  83         return output;
  84 }
  85
  86 void User::StartDNSLookup()
  87 {
  88         try
  89         {
  90                 bool cached;
  91                 const char* ip = this->GetIPString();
  92
  93                 /* Special case for 4in6 (Have i mentioned i HATE 4in6?) */
  94                 if (!strncmp(ip, "0::ffff:", 8))
  95                         res_reverse = new UserResolver(this->ServerInstance, this, ip + 8, DNS_QUERY_PTR4, cached);
  96                 else
  97                         res_reverse = new UserResolver(this->ServerInstance, this, ip, this->GetProtocolFamily() == AF_INET ? DNS_QUERY_PTR4 : DNS_QUERY_PTR6, cached);
  98
  99                 this->ServerInstance->AddResolver(res_reverse, cached);
 100         }
 101         catch (CoreException& e)
 102         {
 103                 ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
 104         }
 105 }
 106
 107 bool User::IsNoticeMaskSet(unsigned char sm)
 108 {
 109         return (snomasks[sm-65]);
 110 }
 111
 112 void User::SetNoticeMask(unsigned char sm, bool value)
 113 {
 114         snomasks[sm-65] = value;
 115 }
 116
 117 const char* User::FormatNoticeMasks()
 118 {
 119         static char data[MAXBUF];
 120         int offset = 0;
 121
 122         for (int n = 0; n < 64; n++)
 123         {
 124                 if (snomasks[n])
 125                         data[offset++] = n+65;
 126         }
 127
 128         data[offset] = 0;
 129         return data;
 130 }
 131
 132
 133
 134 bool User::IsModeSet(unsigned char m)
 135 {
 136         return (modes[m-65]);
 137 }
 138
 139 void User::SetMode(unsigned char m, bool value)
 140 {
 141         modes[m-65] = value;
 142 }
 143
 144 const char* User::FormatModes()
 145 {
 146         static char data[MAXBUF];
 147         int offset = 0;
 148         for (int n = 0; n < 64; n++)
 149         {
 150                 if (modes[n])
 151                         data[offset++] = n+65;
 152         }
 153         data[offset] = 0;
 154         return data;
 155 }
 156
 157 void User::DecrementModes()
 158 {
 159         ServerInstance->Log(DEBUG,"DecrementModes()");
 160         for (unsigned char n = 'A'; n <= 'z'; n++)
 161         {
 162                 if (modes[n-65])
 163                 {
 164                         ServerInstance->Log(DEBUG,"DecrementModes() found mode %c", n);
 165                         ModeHandler* mh = ServerInstance->Modes->FindMode(n, MODETYPE_USER);
 166                         if (mh)
 167                         {
 168                                 ServerInstance->Log(DEBUG,"Found handler %c and call ChangeCount", n);
 169                                 mh->ChangeCount(-1);
 170                         }
 171                 }
 172         }
 173 }
 174
 175 User::User(InspIRCd* Instance, const std::string &uid) : ServerInstance(Instance)
 176 {
 177         *password = *nick = *ident = *host = *dhost = *fullname = *awaymsg = *oper = *uuid = 0;
 178         server = (char*)Instance->FindServerNamePtr(Instance->Config->ServerName);
 179         reset_due = ServerInstance->Time();
 180         age = ServerInstance->Time(true);
 181         Penalty = 0;
 182         lines_in = lastping = signon = idle_lastmsg = nping = registered = 0;
 183         ChannelCount = timeout = bytes_in = bytes_out = cmds_in = cmds_out = 0;
 184         OverPenalty = ExemptFromPenalty = muted = exempt = haspassed = dns_done = false;
 185         fd = -1;
 186         recvq.clear();
 187         sendq.clear();
 188         WriteError.clear();
 189         res_forward = res_reverse = NULL;
 190         Visibility = NULL;
 191         ip = NULL;
 192         MyClass = NULL;
 193         chans.clear();
 194         invites.clear();
 195         memset(modes,0,sizeof(modes));
 196         memset(snomasks,0,sizeof(snomasks));
 197         /* Invalidate cache */
 198         operquit = cached_fullhost = cached_hostip = cached_makehost = cached_fullrealhost = NULL;
 199
 200         if (uid.empty())
 201                 strlcpy(uuid, Instance->GetUID().c_str(), UUID_LENGTH);
 202         else
 203                 strlcpy(uuid, uid.c_str(), UUID_LENGTH);
 204
 205         ServerInstance->Log(DEBUG,"New UUID for user: %s (%s)", uuid, uid.empty() ? "allocated new" : "used remote");
 206
 207         user_hash::iterator finduuid = Instance->uuidlist->find(uuid);
 208         if (finduuid == Instance->uuidlist->end())
 209                 (*Instance->uuidlist)[uuid] = this;
 210         else
 211                 throw CoreException("Duplicate UUID "+std::string(uuid)+" in User constructor");
 212 }
 213
 214 void User::RemoveCloneCounts()
 215 {
 216         clonemap::iterator x = ServerInstance->local_clones.find(this->GetIPString());
 217         if (x != ServerInstance->local_clones.end())
 218         {
 219                 x->second--;
 220                 if (!x->second)
 221                 {
 222                         ServerInstance->local_clones.erase(x);
 223                 }
 224         }
 225
 226         clonemap::iterator y = ServerInstance->global_clones.find(this->GetIPString());
 227         if (y != ServerInstance->global_clones.end())
 228         {
 229                 y->second--;
 230                 if (!y->second)
 231                 {
 232                         ServerInstance->global_clones.erase(y);
 233                 }
 234         }
 235 }
 236
 237 User::~User()
 238 {
 239         /* NULL for remote users :) */
 240         if (this->MyClass)
 241         {
 242                 this->MyClass->RefCount--;
 243                 ServerInstance->Log(DEBUG, "User destructor -- connect refcount now: %u", this->MyClass->RefCount);
 244         }
 245
 246         this->InvalidateCache();
 247         this->DecrementModes();
 248         if (operquit)
 249                 free(operquit);
 250         if (ip)
 251         {
 252                 this->RemoveCloneCounts();
 253
 254                 if (this->GetProtocolFamily() == AF_INET)
 255                 {
 256                         delete (sockaddr_in*)ip;
 257                 }
 258 #ifdef SUPPORT_IP6LINKS
 259                 else
 260                 {
 261                         delete (sockaddr_in6*)ip;
 262                 }
 263 #endif
 264         }
 265
 266         ServerInstance->uuidlist->erase(uuid);
 267 }
 268
 269 char* User::MakeHost()
 270 {
 271         if (this->cached_makehost)
 272                 return this->cached_makehost;
 273
 274         char nhost[MAXBUF];
 275         /* This is much faster than snprintf */
 276         char* t = nhost;
 277         for(char* n = ident; *n; n++)
 278                 *t++ = *n;
 279         *t++ = '@';
 280         for(char* n = host; *n; n++)
 281                 *t++ = *n;
 282         *t = 0;
 283
 284         this->cached_makehost = strdup(nhost);
 285
 286         return this->cached_makehost;
 287 }
 288
 289 char* User::MakeHostIP()
 290 {
 291         if (this->cached_hostip)
 292                 return this->cached_hostip;
 293
 294         char ihost[MAXBUF];
 295         /* This is much faster than snprintf */
 296         char* t = ihost;
 297         for(char* n = ident; *n; n++)
 298                 *t++ = *n;
 299         *t++ = '@';
 300         for(const char* n = this->GetIPString(); *n; n++)
 301                 *t++ = *n;
 302         *t = 0;
 303
 304         this->cached_hostip = strdup(ihost);
 305
 306         return this->cached_hostip;
 307 }
 308
 309 void User::CloseSocket()
 310 {
 311         ServerInstance->SE->Shutdown(this, 2);
 312         ServerInstance->SE->Close(this);
 313 }
 314
 315 char* User::GetFullHost()
 316 {
 317         if (this->cached_fullhost)
 318                 return this->cached_fullhost;
 319
 320         char result[MAXBUF];
 321         char* t = result;
 322         for(char* n = nick; *n; n++)
 323                 *t++ = *n;
 324         *t++ = '!';
 325         for(char* n = ident; *n; n++)
 326                 *t++ = *n;
 327         *t++ = '@';
 328         for(char* n = dhost; *n; n++)
 329                 *t++ = *n;
 330         *t = 0;
 331
 332         this->cached_fullhost = strdup(result);
 333
 334         return this->cached_fullhost;
 335 }
 336
 337 char* User::MakeWildHost()
 338 {
 339         static char nresult[MAXBUF];
 340         char* t = nresult;
 341         *t++ = '*';     *t++ = '!';
 342         *t++ = '*';     *t++ = '@';
 343         for(char* n = dhost; *n; n++)
 344                 *t++ = *n;
 345         *t = 0;
 346         return nresult;
 347 }
 348
 349 int User::ReadData(void* buffer, size_t size)
 350 {
 351         if (IS_LOCAL(this))
 352         {
 353 #ifndef WIN32
 354                 return read(this->fd, buffer, size);
 355 #else
 356                 return recv(this->fd, (char*)buffer, size, 0);
 357 #endif
 358         }
 359         else
 360                 return 0;
 361 }
 362
 363
 364 char* User::GetFullRealHost()
 365 {
 366         if (this->cached_fullrealhost)
 367                 return this->cached_fullrealhost;
 368
 369         char fresult[MAXBUF];
 370         char* t = fresult;
 371         for(char* n = nick; *n; n++)
 372                 *t++ = *n;
 373         *t++ = '!';
 374         for(char* n = ident; *n; n++)
 375                 *t++ = *n;
 376         *t++ = '@';
 377         for(char* n = host; *n; n++)
 378                 *t++ = *n;
 379         *t = 0;
 380
 381         this->cached_fullrealhost = strdup(fresult);
 382
 383         return this->cached_fullrealhost;
 384 }
 385
 386 bool User::IsInvited(const irc::string &channel)
 387 {
 388         for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
 389         {
 390                 if (channel == *i)
 391                 {
 392                         return true;
 393                 }
 394         }
 395         return false;
 396 }
 397
 398 InvitedList* User::GetInviteList()
 399 {
 400         return &invites;
 401 }
 402
 403 void User::InviteTo(const irc::string &channel)
 404 {
 405         invites.push_back(channel);
 406 }
 407
 408 void User::RemoveInvite(const irc::string &channel)
 409 {
 410         for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
 411         {
 412                 if (channel == *i)
 413                 {
 414                         invites.erase(i);
 415                         return;
 416                 }
 417         }
 418 }
 419
 420 bool User::HasPermission(const std::string &command)
 421 {
 422         char* mycmd;
 423         char* savept;
 424         char* savept2;
 425
 426         /*
 427          * users on remote servers can completely bypass all permissions based checks.
 428          * This prevents desyncs when one server has different type/class tags to another.
 429          * That having been said, this does open things up to the possibility of source changes
 430          * allowing remote kills, etc - but if they have access to the src, they most likely have
 431          * access to the conf - so it's an end to a means either way.
 432          */
 433         if (!IS_LOCAL(this))
 434                 return true;
 435
 436         // are they even an oper at all?
 437         if (!IS_OPER(this))
 438         {
 439                 return false;
 440         }
 441
 442         // check their opertype exists (!). This won't affect local users, of course.
 443         opertype_t::iterator iter_opertype = ServerInstance->Config->opertypes.find(this->oper);
 444         if (iter_opertype == ServerInstance->Config->opertypes.end())
 445         {
 446                 return false;
 447         }
 448
 449         /* XXX all this strtok/strdup stuff is a bit ick and horrid -- w00t */
 450         char* Classes = strdup(iter_opertype->second);
 451         char* myclass = strtok_r(Classes," ",&savept);
 452         while (myclass)
 453         {
 454                 operclass_t::iterator iter_operclass = ServerInstance->Config->operclass.find(myclass);
 455                 if (iter_operclass != ServerInstance->Config->operclass.end())
 456                 {
 457                         char* CommandList = strdup(iter_operclass->second);
 458                         mycmd = strtok_r(CommandList," ",&savept2);
 459                         while (mycmd)
 460                         {
 461                                 if ((!strcasecmp(mycmd,command.c_str())) || (*mycmd == '*'))
 462                                 {
 463                                         free(Classes);
 464                                         free(CommandList);
 465                                         return true;
 466                                 }
 467                                 mycmd = strtok_r(NULL," ",&savept2);
 468                         }
 469                         free(CommandList);
 470                 }
 471                 myclass = strtok_r(NULL," ",&savept);
 472         }
 473         free(Classes);
 474
 475         return false;
 476 }
 477
 478 /** NOTE: We cannot pass a const reference to this method.
 479  * The string is changed by the workings of the method,
 480  * so that if we pass const ref, we end up copying it to
 481  * something we can change anyway. Makes sense to just let
 482  * the compiler do that copy for us.
 483  */
 484 bool User::AddBuffer(std::string a)
 485 {
 486         try
 487         {
 488                 std::string::size_type i = a.rfind('\r');
 489
 490                 while (i != std::string::npos)
 491                 {
 492                         a.erase(i, 1);
 493                         i = a.rfind('\r');
 494                 }
 495
 496                 if (a.length())
 497                         recvq.append(a);
 498
 499                 if (this->MyClass && (recvq.length() > this->MyClass->GetRecvqMax()))
 500                 {
 501                         this->SetWriteError("RecvQ exceeded");
 502                         ServerInstance->WriteOpers("*** User %s RecvQ of %d exceeds connect class maximum of %d",this->nick,recvq.length(),this->MyClass->GetRecvqMax());
 503                         return false;
 504                 }
 505
 506                 return true;
 507         }
 508
 509         catch (...)
 510         {
 511                 ServerInstance->Log(DEBUG,"Exception in User::AddBuffer()");
 512                 return false;
 513         }
 514 }
 515
 516 bool User::BufferIsReady()
 517 {
 518         return (recvq.find('\n') != std::string::npos);
 519 }
 520
 521 void User::ClearBuffer()
 522 {
 523         recvq.clear();
 524 }
 525
 526 std::string User::GetBuffer()
 527 {
 528         try
 529         {
 530                 if (recvq.empty())
 531                         return "";
 532
 533                 /* Strip any leading \r or \n off the string.
 534                  * Usually there are only one or two of these,
 535                  * so its is computationally cheap to do.
 536                  */
 537                 std::string::iterator t = recvq.begin();
 538                 while (t != recvq.end() && (*t == '\r' || *t == '\n'))
 539                 {
 540                         recvq.erase(t);
 541                         t = recvq.begin();
 542                 }
 543
 544                 for (std::string::iterator x = recvq.begin(); x != recvq.end(); x++)
 545                 {
 546                         /* Find the first complete line, return it as the
 547                          * result, and leave the recvq as whats left
 548                          */
 549                         if (*x == '\n')
 550                         {
 551                                 std::string ret = std::string(recvq.begin(), x);
 552                                 recvq.erase(recvq.begin(), x + 1);
 553                                 return ret;
 554                         }
 555                 }
 556                 return "";
 557         }
 558
 559         catch (...)
 560         {
 561                 ServerInstance->Log(DEBUG,"Exception in User::GetBuffer()");
 562                 return "";
 563         }
 564 }
 565
 566 void User::AddWriteBuf(const std::string &data)
 567 {
 568         if (*this->GetWriteError())
 569                 return;
 570
 571         if (this->MyClass && (sendq.length() + data.length() > this->MyClass->GetSendqMax()))
 572         {
 573                 /*
 574                  * Fix by brain - Set the error text BEFORE calling writeopers, because
 575                  * if we dont it'll recursively  call here over and over again trying
 576                  * to repeatedly add the text to the sendq!
 577                  */
 578                 this->SetWriteError("SendQ exceeded");
 579                 ServerInstance->WriteOpers("*** User %s SendQ of %d exceeds connect class maximum of %d",this->nick,sendq.length() + data.length(),this->MyClass->GetSendqMax());
 580                 return;
 581         }
 582
 583         try
 584         {
 585                 if (data.length() > MAXBUF - 2) /* MAXBUF has a value of 514, to account for line terminators */
 586                         sendq.append(data.substr(0,MAXBUF - 4)).append("\r\n"); /* MAXBUF-4 = 510 */
 587                 else
 588                         sendq.append(data);
 589         }
 590         catch (...)
 591         {
 592                 this->SetWriteError("SendQ exceeded");
 593                 ServerInstance->WriteOpers("*** User %s SendQ got an exception",this->nick);
 594         }
 595 }
 596
 597 // send AS MUCH OF THE USERS SENDQ as we are able to (might not be all of it)
 598 void User::FlushWriteBuf()
 599 {
 600         try
 601         {
 602                 if ((this->fd == FD_MAGIC_NUMBER) || (*this->GetWriteError()))
 603                 {
 604                         sendq.clear();
 605                 }
 606                 if ((sendq.length()) && (this->fd != FD_MAGIC_NUMBER))
 607                 {
 608                         int old_sendq_length = sendq.length();
 609                         int n_sent = ServerInstance->SE->Send(this, this->sendq.data(), this->sendq.length(), 0);
 610
 611                         if (n_sent == -1)
 612                         {
 613                                 if (errno == EAGAIN)
 614                                 {
 615                                         /* The socket buffer is full. This isnt fatal,
 616                                          * try again later.
 617                                          */
 618                                         this->ServerInstance->SE->WantWrite(this);
 619                                 }
 620                                 else
 621                                 {
 622                                         /* Fatal error, set write error and bail
 623                                          */
 624                                         this->SetWriteError(errno ? strerror(errno) : "EOF from client");
 625                                         return;
 626                                 }
 627                         }
 628                         else
 629                         {
 630                                 /* advance the queue */
 631                                 if (n_sent)
 632                                         this->sendq = this->sendq.substr(n_sent);
 633                                 /* update the user's stats counters */
 634                                 this->bytes_out += n_sent;
 635                                 this->cmds_out++;
 636                                 if (n_sent != old_sendq_length)
 637                                         this->ServerInstance->SE->WantWrite(this);
 638                         }
 639                 }
 640         }
 641
 642         catch (...)
 643         {
 644                 ServerInstance->Log(DEBUG,"Exception in User::FlushWriteBuf()");
 645         }
 646
 647         if (this->sendq.empty())
 648         {
 649                 FOREACH_MOD(I_OnBufferFlushed,OnBufferFlushed(this));
 650         }
 651 }
 652
 653 void User::SetWriteError(const std::string &error)
 654 {
 655         try
 656         {
 657                 // don't try to set the error twice, its already set take the first string.
 658                 if (this->WriteError.empty())
 659                         this->WriteError = error;
 660         }
 661
 662         catch (...)
 663         {
 664                 ServerInstance->Log(DEBUG,"Exception in User::SetWriteError()");
 665         }
 666 }
 667
 668 const char* User::GetWriteError()
 669 {
 670         return this->WriteError.c_str();
 671 }
 672
 673 void User::Oper(const std::string &opertype)
 674 {
 675         try
 676         {
 677                 this->modes[UM_OPERATOR] = 1;
 678                 this->WriteServ("MODE %s :+o", this->nick);
 679                 FOREACH_MOD(I_OnOper, OnOper(this, opertype));
 680                 ServerInstance->Log(DEFAULT,"OPER: %s!%s@%s opered as type: %s", this->nick, this->ident, this->host, opertype.c_str());
 681                 strlcpy(this->oper, opertype.c_str(), NICKMAX - 1);
 682                 ServerInstance->all_opers.push_back(this);
 683                 FOREACH_MOD(I_OnPostOper,OnPostOper(this, opertype));
 684         }
 685
 686         catch (...)
 687         {
 688                 ServerInstance->Log(DEBUG,"Exception in User::Oper()");
 689         }
 690 }
 691
 692 void User::UnOper()
 693 {
 694         try
 695         {
 696                 if (IS_OPER(this))
 697                 {
 698                         // unset their oper type (what IS_OPER checks), and remove +o
 699                         *this->oper = 0;
 700                         this->modes[UM_OPERATOR] = 0;
 701
 702                         // remove the user from the oper list. Will remove multiple entries as a safeguard against bug #404
 703                         ServerInstance->all_opers.remove(this);
 704                 }
 705         }
 706
 707         catch (...)
 708         {
 709                 ServerInstance->Log(DEBUG,"Exception in User::UnOper()");
 710         }
 711 }
 712
 713 void User::QuitUser(InspIRCd* Instance, User *user, const std::string &quitreason, const char* operreason)
 714 {
 715         Instance->Log(DEBUG,"QuitUser: %s '%s'", user->nick, quitreason.c_str());
 716         user->Write("ERROR :Closing link (%s@%s) [%s]", user->ident, user->host, *operreason ? operreason : quitreason.c_str());
 717         user->muted = true;
 718         Instance->GlobalCulls.AddItem(user, quitreason.c_str(), operreason);
 719 }
 720
 721 /* adds or updates an entry in the whowas list */
 722 void User::AddToWhoWas()
 723 {
 724         Command* whowas_command = ServerInstance->Parser->GetHandler("WHOWAS");
 725         if (whowas_command)
 726         {
 727                 std::deque<classbase*> params;
 728                 params.push_back(this);
 729                 whowas_command->HandleInternal(WHOWAS_ADD, params);
 730         }
 731 }
 732
 733 /* add a client connection to the sockets list */
 734 void User::AddClient(InspIRCd* Instance, int socket, int port, bool iscached, int socketfamily, sockaddr* ip)
 735 {
 736         /* NOTE: Calling this one parameter constructor for User automatically
 737          * allocates a new UUID and places it in the hash_map.
 738          */
 739         User* New = NULL;
 740         try
 741         {
 742                 New = new User(Instance);
 743         }
 744         catch (...)
 745         {
 746                 Instance->Log(DEFAULT,"*** WTF *** Duplicated UUID! -- Crack smoking monkies have been unleashed.");
 747                 Instance->WriteOpers("*** WARNING *** Duplicate UUID allocated!");
 748                 return;
 749         }
 750
 751         Instance->Log(DEBUG,"New user fd: %d", socket);
 752
 753         int j = 0;
 754
 755         Instance->unregistered_count++;
 756
 757         char ipaddr[MAXBUF];
 758 #ifdef IPV6
 759         if (socketfamily == AF_INET6)
 760                 inet_ntop(AF_INET6, &((const sockaddr_in6*)ip)->sin6_addr, ipaddr, sizeof(ipaddr));
 761         else
 762 #endif
 763         inet_ntop(AF_INET, &((const sockaddr_in*)ip)->sin_addr, ipaddr, sizeof(ipaddr));
 764
 765         (*(Instance->clientlist))[New->uuid] = New;
 766         New->SetFd(socket);
 767
 768         /* The users default nick is their UUID */
 769         strlcpy(New->nick, New->uuid, NICKMAX - 1);
 770
 771         New->server = Instance->FindServerNamePtr(Instance->Config->ServerName);
 772         /* We don't need range checking here, we KNOW 'unknown\0' will fit into the ident field. */
 773         strcpy(New->ident, "unknown");
 774
 775         New->registered = REG_NONE;
 776         New->signon = Instance->Time() + Instance->Config->dns_timeout;
 777         New->lastping = 1;
 778
 779         New->SetSockAddr(socketfamily, ipaddr, port);
 780
 781         /* Smarter than your average bear^H^H^H^Hset of strlcpys. */
 782         for (const char* temp = New->GetIPString(); *temp && j < 64; temp++, j++)
 783                 New->dhost[j] = New->host[j] = *temp;
 784         New->dhost[j] = New->host[j] = 0;
 785
 786         Instance->AddLocalClone(New);
 787         Instance->AddGlobalClone(New);
 788
 789         /*
 790          * First class check. We do this again in FullConnect after DNS is done, and NICK/USER is recieved.
 791          * See my note down there for why this is required. DO NOT REMOVE. :) -- w00t
 792          */
 793         ConnectClass* i = New->SetClass();
 794
 795         if (!i)
 796         {
 797                 User::QuitUser(Instance, New, "Access denied by configuration");
 798                 return;
 799         }
 800
 801         /*
 802          * Check connect class settings and initialise settings into User.
 803          * This will be done again after DNS resolution. -- w00t
 804          */
 805         New->CheckClass();
 806
 807         Instance->local_users.push_back(New);
 808
 809         if ((Instance->local_users.size() > Instance->Config->SoftLimit) || (Instance->local_users.size() >= MAXCLIENTS))
 810         {
 811                 Instance->WriteOpers("*** Warning: softlimit value has been reached: %d clients", Instance->Config->SoftLimit);
 812                 User::QuitUser(Instance, New,"No more connections allowed");
 813                 return;
 814         }
 815
 816         /*
 817          * XXX -
 818          * this is done as a safety check to keep the file descriptors within range of fd_ref_table.
 819          * its a pretty big but for the moment valid assumption:
 820          * file descriptors are handed out starting at 0, and are recycled as theyre freed.
 821          * therefore if there is ever an fd over 65535, 65536 clients must be connected to the
 822          * irc server at once (or the irc server otherwise initiating this many connections, files etc)
 823          * which for the time being is a physical impossibility (even the largest networks dont have more
 824          * than about 10,000 users on ONE server!)
 825          */
 826 #ifndef WINDOWS
 827         if ((unsigned int)socket >= MAX_DESCRIPTORS)
 828         {
 829                 User::QuitUser(Instance, New, "Server is full");
 830                 return;
 831         }
 832 #endif
 833         /*
 834          * even with bancache, we still have to keep User::exempt current.
 835          * besides that, if we get a positive bancache hit, we still won't fuck
 836          * them over if they are exempt. -- w00t
 837          */
 838         New->exempt = (Instance->XLines->MatchesLine("E",New) != NULL);
 839
 840         if (BanCacheHit *b = Instance->BanCache->GetHit(New->GetIPString()))
 841         {
 842                 if (!b->Type.empty() && !New->exempt)
 843                 {
 844                         /* user banned */
 845                         Instance->Log(DEBUG, std::string("BanCache: Positive hit for ") + New->GetIPString());
 846                         if (*Instance->Config->MoronBanner)
 847                                 New->WriteServ("NOTICE %s :*** %s", New->nick, Instance->Config->MoronBanner);
 848                         User::QuitUser(Instance, New, b->Reason);
 849                         return;
 850                 }
 851                 else
 852                 {
 853                         Instance->Log(DEBUG, std::string("BanCache: Negative hit for ") + New->GetIPString());
 854                 }
 855         }
 856         else
 857         {
 858                 if (!New->exempt)
 859                 {
 860                         XLine* r = Instance->XLines->MatchesLine("Z",New);
 861
 862                         if (r)
 863                         {
 864                                 r->Apply(New);
 865                                 return;
 866                         }
 867                 }
 868         }
 869
 870         if (socket > -1)
 871         {
 872                 if (!Instance->SE->AddFd(New))
 873                 {
 874                         Instance->Log(DEBUG,"Internal error on new connection");
 875                         User::QuitUser(Instance, New, "Internal error handling connection");
 876                 }
 877         }
 878
 879         /* NOTE: even if dns lookups are *off*, we still need to display this.
 880          * BOPM and other stuff requires it.
 881          */
 882         New->WriteServ("NOTICE Auth :*** Looking up your hostname...");
 883
 884         if (Instance->Config->NoUserDns)
 885         {
 886                 New->dns_done = true;
 887         }
 888         else
 889         {
 890                 New->StartDNSLookup();
 891         }
 892 }
 893
 894 unsigned long User::GlobalCloneCount()
 895 {
 896         clonemap::iterator x = ServerInstance->global_clones.find(this->GetIPString());
 897         if (x != ServerInstance->global_clones.end())
 898                 return x->second;
 899         else
 900                 return 0;
 901 }
 902
 903 unsigned long User::LocalCloneCount()
 904 {
 905         clonemap::iterator x = ServerInstance->local_clones.find(this->GetIPString());
 906         if (x != ServerInstance->local_clones.end())
 907                 return x->second;
 908         else
 909                 return 0;
 910 }
 911
 912 /*
 913  * Check class restrictions
 914  */
 915 void User::CheckClass()
 916 {
 917         ConnectClass* a = this->MyClass;
 918
 919         if ((!a) || (a->GetType() == CC_DENY))
 920         {
 921                 User::QuitUser(ServerInstance, this, "Unauthorised connection");
 922                 return;
 923         }
 924         else if ((a->GetMaxLocal()) && (this->LocalCloneCount() > a->GetMaxLocal()))
 925         {
 926                 User::QuitUser(ServerInstance, this, "No more connections allowed from your host via this connect class (local)");
 927                 ServerInstance->WriteOpers("*** WARNING: maximum LOCAL connections (%ld) exceeded for IP %s", a->GetMaxLocal(), this->GetIPString());
 928                 return;
 929         }
 930         else if ((a->GetMaxGlobal()) && (this->GlobalCloneCount() > a->GetMaxGlobal()))
 931         {
 932                 User::QuitUser(ServerInstance, this, "No more connections allowed from your host via this connect class (global)");
 933                 ServerInstance->WriteOpers("*** WARNING: maximum GLOBAL connections (%ld) exceeded for IP %s", a->GetMaxGlobal(), this->GetIPString());
 934                 return;
 935         }
 936
 937         this->nping = ServerInstance->Time() + a->GetPingTime() + ServerInstance->Config->dns_timeout;
 938         this->timeout = ServerInstance->Time() + a->GetRegTimeout();
 939         this->MaxChans = a->GetMaxChans();
 940 }
 941
 942 void User::FullConnect()
 943 {
 944         ServerInstance->stats->statsConnects++;
 945         this->idle_lastmsg = ServerInstance->Time();
 946
 947         /*
 948          * You may be thinking "wtf, we checked this in User::AddClient!" - and yes, we did, BUT.
 949          * At the time AddClient is called, we don't have a resolved host, by here we probably do - which
 950          * may put the user into a totally seperate class with different restrictions! so we *must* check again.
 951          * Don't remove this! -- w00t
 952          */
 953         this->SetClass();
 954
 955         /* Check the password, if one is required by the user's connect class.
 956          * This CANNOT be in CheckClass(), because that is called prior to PASS as well!
 957          */
 958         if (this->MyClass && !this->MyClass->GetPass().empty() && !this->haspassed)
 959         {
 960                 User::QuitUser(ServerInstance, this, "Invalid password");
 961                 return;
 962         }
 963
 964         if (!this->exempt)
 965         {
 966                 GLine *r = (GLine *)ServerInstance->XLines->MatchesLine("G", this);
 967
 968                 if (r)
 969                 {
 970                         this->muted = true;
 971                         r->Apply(this);
 972                         return;
 973                 }
 974
 975                 KLine *n = (KLine *)ServerInstance->XLines->MatchesLine("K", this);
 976
 977                 if (n)
 978                 {
 979                         this->muted = true;
 980                         n->Apply(this);
 981                         return;
 982                 }
 983         }
 984
 985         this->WriteServ("NOTICE Auth :Welcome to \002%s\002!",ServerInstance->Config->Network);
 986         this->WriteServ("001 %s :Welcome to the %s IRC Network %s!%s@%s",this->nick, ServerInstance->Config->Network, this->nick, this->ident, this->host);
 987         this->WriteServ("002 %s :Your host is %s, running version %s",this->nick,ServerInstance->Config->ServerName,VERSION);
 988         this->WriteServ("003 %s :This server was created %s %s", this->nick, __TIME__, __DATE__);
 989         this->WriteServ("004 %s %s %s %s %s %s", this->nick, ServerInstance->Config->ServerName, VERSION, ServerInstance->Modes->UserModeList().c_str(), ServerInstance->Modes->ChannelModeList().c_str(), ServerInstance->Modes->ParaModeList().c_str());
 990
 991         ServerInstance->Config->Send005(this);
 992
 993         this->WriteServ("042 %s %s :your unique ID", this->nick, this->uuid);
 994
 995
 996         this->ShowMOTD();
 997
 998         /* Now registered */
 999         if (ServerInstance->unregistered_count)
1000                 ServerInstance->unregistered_count--;
1001
1002         /* Trigger LUSERS output, give modules a chance too */
1003         int MOD_RESULT = 0;
1004         FOREACH_RESULT(I_OnPreCommand, OnPreCommand("LUSERS", NULL, 0, this, true, "LUSERS"));
1005         if (!MOD_RESULT)
1006                 ServerInstance->CallCommandHandler("LUSERS", NULL, 0, this);
1007
1008         /*
1009          * We don't set REG_ALL until triggering OnUserConnect, so some module events don't spew out stuff
1010          * for a user that doesn't exist yet.
1011          */
1012         FOREACH_MOD(I_OnUserConnect,OnUserConnect(this));
1013
1014         this->registered = REG_ALL;
1015
1016         FOREACH_MOD(I_OnPostConnect,OnPostConnect(this));
1017
1018         ServerInstance->SNO->WriteToSnoMask('c',"Client connecting on port %d: %s!%s@%s [%s] [%s]", this->GetPort(), this->nick, this->ident, this->host, this->GetIPString(), this->fullname);
1019 }
1020
1021 /** User::UpdateNick()
1022  * re-allocates a nick in the user_hash after they change nicknames,
1023  * returns a pointer to the new user as it may have moved
1024  */
1025 User* User::UpdateNickHash(const char* New)
1026 {
1027         try
1028         {
1029                 //user_hash::iterator newnick;
1030                 user_hash::iterator oldnick = ServerInstance->clientlist->find(this->nick);
1031
1032                 if (!strcasecmp(this->nick,New))
1033                         return oldnick->second;
1034
1035                 if (oldnick == ServerInstance->clientlist->end())
1036                         return NULL; /* doesnt exist */
1037
1038                 User* olduser = oldnick->second;
1039                 (*(ServerInstance->clientlist))[New] = olduser;
1040                 ServerInstance->clientlist->erase(oldnick);
1041                 return olduser;
1042         }
1043
1044         catch (...)
1045         {
1046                 ServerInstance->Log(DEBUG,"Exception in User::UpdateNickHash()");
1047                 return NULL;
1048         }
1049 }
1050
1051 void User::InvalidateCache()
1052 {
1053         /* Invalidate cache */
1054         if (cached_fullhost)
1055                 free(cached_fullhost);
1056         if (cached_hostip)
1057                 free(cached_hostip);
1058         if (cached_makehost)
1059                 free(cached_makehost);
1060         if (cached_fullrealhost)
1061                 free(cached_fullrealhost);
1062         cached_fullhost = cached_hostip = cached_makehost = cached_fullrealhost = NULL;
1063 }
1064
1065 bool User::ForceNickChange(const char* newnick)
1066 {
1067         try
1068         {
1069                 int MOD_RESULT = 0;
1070
1071                 this->InvalidateCache();
1072
1073                 FOREACH_RESULT(I_OnUserPreNick,OnUserPreNick(this, newnick));
1074
1075                 if (MOD_RESULT)
1076                 {
1077                         ServerInstance->stats->statsCollisions++;
1078                         return false;
1079                 }
1080
1081                 if (ServerInstance->XLines->MatchesLine("Q",newnick))
1082                 {
1083                         ServerInstance->stats->statsCollisions++;
1084                         return false;
1085                 }
1086
1087                 if (this->registered == REG_ALL)
1088                 {
1089                         std::deque<classbase*> dummy;
1090                         Command* nickhandler = ServerInstance->Parser->GetHandler("NICK");
1091                         if (nickhandler)
1092                         {
1093                                 nickhandler->HandleInternal(1, dummy);
1094                                 bool result = (ServerInstance->Parser->CallHandler("NICK", &newnick, 1, this) == CMD_SUCCESS);
1095                                 nickhandler->HandleInternal(0, dummy);
1096                                 return result;
1097                         }
1098                 }
1099                 return false;
1100         }
1101
1102         catch (...)
1103         {
1104                 ServerInstance->Log(DEBUG,"Exception in User::ForceNickChange()");
1105                 return false;
1106         }
1107 }
1108
1109 void User::SetSockAddr(int protocol_family, const char* ip, int port)
1110 {
1111         switch (protocol_family)
1112         {
1113 #ifdef SUPPORT_IP6LINKS
1114                 case AF_INET6:
1115                 {
1116                         sockaddr_in6* sin = new sockaddr_in6;
1117                         sin->sin6_family = AF_INET6;
1118                         sin->sin6_port = port;
1119                         inet_pton(AF_INET6, ip, &sin->sin6_addr);
1120                         this->ip = (sockaddr*)sin;
1121                 }
1122                 break;
1123 #endif
1124                 case AF_INET:
1125                 {
1126                         sockaddr_in* sin = new sockaddr_in;
1127                         sin->sin_family = AF_INET;
1128                         sin->sin_port = port;
1129                         inet_pton(AF_INET, ip, &sin->sin_addr);
1130                         this->ip = (sockaddr*)sin;
1131                 }
1132                 break;
1133                 default:
1134                         ServerInstance->Log(DEBUG,"Uh oh, I dont know protocol %d to be set on '%s'!", protocol_family, this->nick);
1135                 break;
1136         }
1137 }
1138
1139 int User::GetPort()
1140 {
1141         if (this->ip == NULL)
1142                 return 0;
1143
1144         switch (this->GetProtocolFamily())
1145         {
1146 #ifdef SUPPORT_IP6LINKS
1147                 case AF_INET6:
1148                 {
1149                         sockaddr_in6* sin = (sockaddr_in6*)this->ip;
1150                         return sin->sin6_port;
1151                 }
1152                 break;
1153 #endif
1154                 case AF_INET:
1155                 {
1156                         sockaddr_in* sin = (sockaddr_in*)this->ip;
1157                         return sin->sin_port;
1158                 }
1159                 break;
1160                 default:
1161                 break;
1162         }
1163         return 0;
1164 }
1165
1166 int User::GetProtocolFamily()
1167 {
1168         if (this->ip == NULL)
1169                 return 0;
1170
1171         sockaddr_in* sin = (sockaddr_in*)this->ip;
1172         return sin->sin_family;
1173 }
1174
1175 /*
1176  * XXX the duplication here is horrid..
1177  * do we really need two methods doing essentially the same thing?
1178  */
1179 const char* User::GetIPString()
1180 {
1181         static char buf[1024];
1182
1183         if (this->ip == NULL)
1184                 return "";
1185
1186         switch (this->GetProtocolFamily())
1187         {
1188 #ifdef SUPPORT_IP6LINKS
1189                 case AF_INET6:
1190                 {
1191                         static char temp[1024];
1192
1193                         sockaddr_in6* sin = (sockaddr_in6*)this->ip;
1194                         inet_ntop(sin->sin6_family, &sin->sin6_addr, buf, sizeof(buf));
1195                         /* IP addresses starting with a : on irc are a Bad Thing (tm) */
1196                         if (*buf == ':')
1197                         {
1198                                 strlcpy(&temp[1], buf, sizeof(temp) - 1);
1199                                 *temp = '0';
1200                                 return temp;
1201                         }
1202                         return buf;
1203                 }
1204                 break;
1205 #endif
1206                 case AF_INET:
1207                 {
1208                         sockaddr_in* sin = (sockaddr_in*)this->ip;
1209                         inet_ntop(sin->sin_family, &sin->sin_addr, buf, sizeof(buf));
1210                         return buf;
1211                 }
1212                 break;
1213                 default:
1214                 break;
1215         }
1216         return "";
1217 }
1218
1219 /** NOTE: We cannot pass a const reference to this method.
1220  * The string is changed by the workings of the method,
1221  * so that if we pass const ref, we end up copying it to
1222  * something we can change anyway. Makes sense to just let
1223  * the compiler do that copy for us.
1224  */
1225 void User::Write(std::string text)
1226 {
1227         if (!ServerInstance->SE->BoundsCheckFd(this))
1228                 return;
1229
1230         try
1231         {
1232                 /* ServerInstance->Log(DEBUG,"C[%d] O %s", this->GetFd(), text.c_str());
1233                  * WARNING: The above debug line is VERY loud, do NOT
1234                  * enable it till we have a good way of filtering it
1235                  * out of the logs (e.g. 1.2 would be good).
1236                  */
1237                 text.append("\r\n");
1238         }
1239         catch (...)
1240         {
1241                 ServerInstance->Log(DEBUG,"Exception in User::Write() std::string::append");
1242                 return;
1243         }
1244
1245         if (ServerInstance->Config->GetIOHook(this->GetPort()))
1246         {
1247                 try
1248                 {
1249                         /* XXX: The lack of buffering here is NOT a bug, modules implementing this interface have to
1250                          * implement their own buffering mechanisms
1251                          */
1252                         ServerInstance->Config->GetIOHook(this->GetPort())->OnRawSocketWrite(this->fd, text.data(), text.length());
1253                 }
1254                 catch (CoreException& modexcept)
1255                 {
1256                         ServerInstance->Log(DEBUG, "%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
1257                 }
1258         }
1259         else
1260         {
1261                 this->AddWriteBuf(text);
1262         }
1263         ServerInstance->stats->statsSent += text.length();
1264         this->ServerInstance->SE->WantWrite(this);
1265 }
1266
1267 /** Write()
1268  */
1269 void User::Write(const char *text, ...)
1270 {
1271         va_list argsPtr;
1272         char textbuffer[MAXBUF];
1273
1274         va_start(argsPtr, text);
1275         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1276         va_end(argsPtr);
1277
1278         this->Write(std::string(textbuffer));
1279 }
1280
1281 void User::WriteServ(const std::string& text)
1282 {
1283         char textbuffer[MAXBUF];
1284
1285         snprintf(textbuffer,MAXBUF,":%s %s",ServerInstance->Config->ServerName,text.c_str());
1286         this->Write(std::string(textbuffer));
1287 }
1288
1289 /** WriteServ()
1290  *  Same as Write(), except `text' is prefixed with `:server.name '.
1291  */
1292 void User::WriteServ(const char* text, ...)
1293 {
1294         va_list argsPtr;
1295         char textbuffer[MAXBUF];
1296
1297         va_start(argsPtr, text);
1298         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1299         va_end(argsPtr);
1300
1301         this->WriteServ(std::string(textbuffer));
1302 }
1303
1304
1305 void User::WriteFrom(User *user, const std::string &text)
1306 {
1307         char tb[MAXBUF];
1308
1309         snprintf(tb,MAXBUF,":%s %s",user->GetFullHost(),text.c_str());
1310
1311         this->Write(std::string(tb));
1312 }
1313
1314
1315 /* write text from an originating user to originating user */
1316
1317 void User::WriteFrom(User *user, const char* text, ...)
1318 {
1319         va_list argsPtr;
1320         char textbuffer[MAXBUF];
1321
1322         va_start(argsPtr, text);
1323         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1324         va_end(argsPtr);
1325
1326         this->WriteFrom(user, std::string(textbuffer));
1327 }
1328
1329
1330 /* write text to an destination user from a source user (e.g. user privmsg) */
1331
1332 void User::WriteTo(User *dest, const char *data, ...)
1333 {
1334         char textbuffer[MAXBUF];
1335         va_list argsPtr;
1336
1337         va_start(argsPtr, data);
1338         vsnprintf(textbuffer, MAXBUF, data, argsPtr);
1339         va_end(argsPtr);
1340
1341         this->WriteTo(dest, std::string(textbuffer));
1342 }
1343
1344 void User::WriteTo(User *dest, const std::string &data)
1345 {
1346         dest->WriteFrom(this, data);
1347 }
1348
1349
1350 void User::WriteCommon(const char* text, ...)
1351 {
1352         char textbuffer[MAXBUF];
1353         va_list argsPtr;
1354
1355         if (this->registered != REG_ALL)
1356                 return;
1357
1358         va_start(argsPtr, text);
1359         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1360         va_end(argsPtr);
1361
1362         this->WriteCommon(std::string(textbuffer));
1363 }
1364
1365 void User::WriteCommon(const std::string &text)
1366 {
1367         try
1368         {
1369                 bool sent_to_at_least_one = false;
1370                 char tb[MAXBUF];
1371
1372                 if (this->registered != REG_ALL)
1373                         return;
1374
1375                 uniq_id++;
1376
1377                 /* We dont want to be doing this n times, just once */
1378                 snprintf(tb,MAXBUF,":%s %s",this->GetFullHost(),text.c_str());
1379                 std::string out = tb;
1380
1381                 for (UCListIter v = this->chans.begin(); v != this->chans.end(); v++)
1382                 {
1383                         CUList* ulist = v->first->GetUsers();
1384                         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1385                         {
1386                                 if ((IS_LOCAL(i->first)) && (already_sent[i->first->fd] != uniq_id))
1387                                 {
1388                                         already_sent[i->first->fd] = uniq_id;
1389                                         i->first->Write(out);
1390                                         sent_to_at_least_one = true;
1391                                 }
1392                         }
1393                 }
1394
1395                 /*
1396                  * if the user was not in any channels, no users will receive the text. Make sure the user
1397                  * receives their OWN message for WriteCommon
1398                  */
1399                 if (!sent_to_at_least_one)
1400                 {
1401                         this->Write(std::string(tb));
1402                 }
1403         }
1404
1405         catch (...)
1406         {
1407                 ServerInstance->Log(DEBUG,"Exception in User::WriteCommon()");
1408         }
1409 }
1410
1411
1412 /* write a formatted string to all users who share at least one common
1413  * channel, NOT including the source user e.g. for use in QUIT
1414  */
1415
1416 void User::WriteCommonExcept(const char* text, ...)
1417 {
1418         char textbuffer[MAXBUF];
1419         va_list argsPtr;
1420
1421         va_start(argsPtr, text);
1422         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1423         va_end(argsPtr);
1424
1425         this->WriteCommonExcept(std::string(textbuffer));
1426 }
1427
1428 void User::WriteCommonQuit(const std::string &normal_text, const std::string &oper_text)
1429 {
1430         char tb1[MAXBUF];
1431         char tb2[MAXBUF];
1432
1433         if (this->registered != REG_ALL)
1434                 return;
1435
1436         uniq_id++;
1437         snprintf(tb1,MAXBUF,":%s QUIT :%s",this->GetFullHost(),normal_text.c_str());
1438         snprintf(tb2,MAXBUF,":%s QUIT :%s",this->GetFullHost(),oper_text.c_str());
1439         std::string out1 = tb1;
1440         std::string out2 = tb2;
1441
1442         for (UCListIter v = this->chans.begin(); v != this->chans.end(); v++)
1443         {
1444                 CUList *ulist = v->first->GetUsers();
1445                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1446                 {
1447                         if (this != i->first)
1448                         {
1449                                 if ((IS_LOCAL(i->first)) && (already_sent[i->first->fd] != uniq_id))
1450                                 {
1451                                         already_sent[i->first->fd] = uniq_id;
1452                                         i->first->Write(IS_OPER(i->first) ? out2 : out1);
1453                                 }
1454                         }
1455                 }
1456         }
1457 }
1458
1459 void User::WriteCommonExcept(const std::string &text)
1460 {
1461         char tb1[MAXBUF];
1462         std::string out1;
1463
1464         if (this->registered != REG_ALL)
1465                 return;
1466
1467         uniq_id++;
1468         snprintf(tb1,MAXBUF,":%s %s",this->GetFullHost(),text.c_str());
1469         out1 = tb1;
1470
1471         for (UCListIter v = this->chans.begin(); v != this->chans.end(); v++)
1472         {
1473                 CUList *ulist = v->first->GetUsers();
1474                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1475                 {
1476                         if (this != i->first)
1477                         {
1478                                 if ((IS_LOCAL(i->first)) && (already_sent[i->first->fd] != uniq_id))
1479                                 {
1480                                         already_sent[i->first->fd] = uniq_id;
1481                                         i->first->Write(out1);
1482                                 }
1483                         }
1484                 }
1485         }
1486
1487 }
1488
1489 void User::WriteWallOps(const std::string &text)
1490 {
1491         if (!IS_OPER(this) && IS_LOCAL(this))
1492                 return;
1493
1494         std::string wallop("WALLOPS :");
1495         wallop.append(text);
1496
1497         for (std::vector<User*>::const_iterator i = ServerInstance->local_users.begin(); i != ServerInstance->local_users.end(); i++)
1498         {
1499                 User* t = *i;
1500                 if (t->IsModeSet('w'))
1501                         this->WriteTo(t,wallop);
1502         }
1503 }
1504
1505 void User::WriteWallOps(const char* text, ...)
1506 {
1507         char textbuffer[MAXBUF];
1508         va_list argsPtr;
1509
1510         va_start(argsPtr, text);
1511         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1512         va_end(argsPtr);
1513
1514         this->WriteWallOps(std::string(textbuffer));
1515 }
1516
1517 /* return 0 or 1 depending if users u and u2 share one or more common channels
1518  * (used by QUIT, NICK etc which arent channel specific notices)
1519  *
1520  * The old algorithm in 1.0 for this was relatively inefficient, iterating over
1521  * the first users channels then the second users channels within the outer loop,
1522  * therefore it was a maximum of x*y iterations (upon returning 0 and checking
1523  * all possible iterations). However this new function instead checks against the
1524  * channel's userlist in the inner loop which is a std::map<User*,User*>
1525  * and saves us time as we already know what pointer value we are after.
1526  * Don't quote me on the maths as i am not a mathematician or computer scientist,
1527  * but i believe this algorithm is now x+(log y) maximum iterations instead.
1528  */
1529 bool User::SharesChannelWith(User *other)
1530 {
1531         if ((!other) || (this->registered != REG_ALL) || (other->registered != REG_ALL))
1532                 return false;
1533
1534         /* Outer loop */
1535         for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1536         {
1537                 /* Eliminate the inner loop (which used to be ~equal in size to the outer loop)
1538                  * by replacing it with a map::find which *should* be more efficient
1539                  */
1540                 if (i->first->HasUser(other))
1541                         return true;
1542         }
1543         return false;
1544 }
1545
1546 bool User::ChangeName(const char* gecos)
1547 {
1548         if (!strcmp(gecos, this->fullname))
1549                 return true;
1550
1551         if (IS_LOCAL(this))
1552         {
1553                 int MOD_RESULT = 0;
1554                 FOREACH_RESULT(I_OnChangeLocalUserGECOS,OnChangeLocalUserGECOS(this,gecos));
1555                 if (MOD_RESULT)
1556                         return false;
1557                 FOREACH_MOD(I_OnChangeName,OnChangeName(this,gecos));
1558         }
1559         strlcpy(this->fullname,gecos,MAXGECOS+1);
1560
1561         return true;
1562 }
1563
1564 bool User::ChangeDisplayedHost(const char* host)
1565 {
1566         if (!strcmp(host, this->dhost))
1567                 return true;
1568
1569         if (IS_LOCAL(this))
1570         {
1571                 int MOD_RESULT = 0;
1572                 FOREACH_RESULT(I_OnChangeLocalUserHost,OnChangeLocalUserHost(this,host));
1573                 if (MOD_RESULT)
1574                         return false;
1575                 FOREACH_MOD(I_OnChangeHost,OnChangeHost(this,host));
1576         }
1577         if (this->ServerInstance->Config->CycleHosts)
1578                 this->WriteCommonExcept("QUIT :Changing hosts");
1579
1580         /* Fix by Om: User::dhost is 65 long, this was truncating some long hosts */
1581         strlcpy(this->dhost,host,64);
1582
1583         this->InvalidateCache();
1584
1585         if (this->ServerInstance->Config->CycleHosts)
1586         {
1587                 for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1588                 {
1589                         i->first->WriteAllExceptSender(this, false, 0, "JOIN %s", i->first->name);
1590                         std::string n = this->ServerInstance->Modes->ModeString(this, i->first);
1591                         if (n.length() > 0)
1592                                 i->first->WriteAllExceptSender(this, true, 0, "MODE %s +%s", i->first->name, n.c_str());
1593                 }
1594         }
1595
1596         if (IS_LOCAL(this))
1597                 this->WriteServ("396 %s %s :is now your displayed host",this->nick,this->dhost);
1598
1599         return true;
1600 }
1601
1602 bool User::ChangeIdent(const char* newident)
1603 {
1604         if (!strcmp(newident, this->ident))
1605                 return true;
1606
1607         if (this->ServerInstance->Config->CycleHosts)
1608                 this->WriteCommonExcept("%s","QUIT :Changing ident");
1609
1610         strlcpy(this->ident, newident, IDENTMAX+2);
1611
1612         this->InvalidateCache();
1613
1614         if (this->ServerInstance->Config->CycleHosts)
1615         {
1616                 for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1617                 {
1618                         i->first->WriteAllExceptSender(this, false, 0, "JOIN %s", i->first->name);
1619                         std::string n = this->ServerInstance->Modes->ModeString(this, i->first);
1620                         if (n.length() > 0)
1621                                 i->first->WriteAllExceptSender(this, true, 0, "MODE %s +%s", i->first->name, n.c_str());
1622                 }
1623         }
1624
1625         return true;
1626 }
1627
1628 void User::SendAll(const char* command, char* text, ...)
1629 {
1630         char textbuffer[MAXBUF];
1631         char formatbuffer[MAXBUF];
1632         va_list argsPtr;
1633
1634         va_start(argsPtr, text);
1635         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1636         va_end(argsPtr);
1637
1638         snprintf(formatbuffer,MAXBUF,":%s %s $* :%s", this->GetFullHost(), command, textbuffer);
1639         std::string fmt = formatbuffer;
1640
1641         for (std::vector<User*>::const_iterator i = ServerInstance->local_users.begin(); i != ServerInstance->local_users.end(); i++)
1642         {
1643                 (*i)->Write(fmt);
1644         }
1645 }
1646
1647
1648 std::string User::ChannelList(User* source)
1649 {
1650         try
1651         {
1652                 std::string list;
1653                 for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1654                 {
1655                         /* If the target is the same as the sender, let them see all their channels.
1656                          * If the channel is NOT private/secret OR the user shares a common channel
1657                          * If the user is an oper, and the <options:operspywhois> option is set.
1658                          */
1659                         if ((source == this) || (IS_OPER(source) && ServerInstance->Config->OperSpyWhois) || (((!i->first->IsModeSet('p')) && (!i->first->IsModeSet('s'))) || (i->first->HasUser(source))))
1660                         {
1661                                 list.append(i->first->GetPrefixChar(this)).append(i->first->name).append(" ");
1662                         }
1663                 }
1664                 return list;
1665         }
1666         catch (...)
1667         {
1668                 ServerInstance->Log(DEBUG,"Exception in User::ChannelList()");
1669                 return "";
1670         }
1671 }
1672
1673 void User::SplitChanList(User* dest, const std::string &cl)
1674 {
1675         std::string line;
1676         std::ostringstream prefix;
1677         std::string::size_type start, pos, length;
1678
1679         try
1680         {
1681                 prefix << this->nick << " " << dest->nick << " :";
1682                 line = prefix.str();
1683                 int namelen = strlen(ServerInstance->Config->ServerName) + 6;
1684
1685                 for (start = 0; (pos = cl.find(' ', start)) != std::string::npos; start = pos+1)
1686                 {
1687                         length = (pos == std::string::npos) ? cl.length() : pos;
1688
1689                         if (line.length() + namelen + length - start > 510)
1690                         {
1691                                 ServerInstance->SendWhoisLine(this, dest, 319, "%s", line.c_str());
1692                                 line = prefix.str();
1693                         }
1694
1695                         if(pos == std::string::npos)
1696                         {
1697                                 line.append(cl.substr(start, length - start));
1698                                 break;
1699                         }
1700                         else
1701                         {
1702                                 line.append(cl.substr(start, length - start + 1));
1703                         }
1704                 }
1705
1706                 if (line.length())
1707                 {
1708                         ServerInstance->SendWhoisLine(this, dest, 319, "%s", line.c_str());
1709                 }
1710         }
1711
1712         catch (...)
1713         {
1714                 ServerInstance->Log(DEBUG,"Exception in User::SplitChanList()");
1715         }
1716 }
1717
1718 unsigned int User::GetMaxChans()
1719 {
1720         return this->MaxChans;
1721 }
1722
1723
1724 /*
1725  * Sets a user's connection class.
1726  * If the class name is provided, it will be used. Otherwise, the class will be guessed using host/ip/ident/etc.
1727  * NOTE: If the <ALLOW> or <DENY> tag specifies an ip, and this user resolves,
1728  * then their ip will be taken as 'priority' anyway, so for example,
1729  * <connect allow="127.0.0.1"> will match joe!bloggs@localhost
1730  */
1731 ConnectClass* User::SetClass(const std::string &explicit_name)
1732 {
1733         ConnectClass *found = NULL;
1734
1735         if (!IS_LOCAL(this))
1736                 return NULL;
1737
1738         if (!explicit_name.empty())
1739         {
1740                 for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++)
1741                 {
1742                         ConnectClass* c = *i;
1743
1744                         if (explicit_name == c->GetName() && !c->GetDisabled())
1745                         {
1746                                 found = c;
1747                         }
1748                 }
1749         }
1750         else
1751         {
1752                 for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++)
1753                 {
1754                         ConnectClass* c = *i;
1755
1756                         if (((match(this->GetIPString(),c->GetHost().c_str(),true)) || (match(this->host,c->GetHost().c_str()))))
1757                         {
1758                                 if (c->GetPort())
1759                                 {
1760                                         if (this->GetPort() == c->GetPort() && !c->GetDisabled())
1761                                         {
1762                                                 found = c;
1763                                         }
1764                                         else
1765                                                 continue;
1766                                 }
1767                                 else
1768                                 {
1769                                         if (!c->GetDisabled())
1770                                                 found = c;
1771                                 }
1772                         }
1773                 }
1774         }
1775
1776         /* ensure we don't fuck things up refcount wise, only remove them from a class if we find a new one :P */
1777         if (found)
1778         {
1779                 /* deny change if change will take class over the limit */
1780                 if (found->limit && (found->RefCount + 1 >= found->limit))
1781                 {
1782                         ServerInstance->Log(DEBUG, "OOPS: Connect class limit (%u) hit, denying", found->limit);
1783                         return this->MyClass;
1784                 }
1785
1786                 /* should always be valid, but just in case .. */
1787                 if (this->MyClass)
1788                 {
1789                         if (found == this->MyClass) // no point changing this shit :P
1790                                 return this->MyClass;
1791                         this->MyClass->RefCount--;
1792                         ServerInstance->Log(DEBUG, "Untying user from connect class -- refcount: %u", this->MyClass->RefCount);
1793                 }
1794
1795                 this->MyClass = found;
1796                 this->MyClass->RefCount++;
1797                 ServerInstance->Log(DEBUG, "User tied to new class -- connect refcount now: %u", this->MyClass->RefCount);
1798         }
1799
1800         return this->MyClass;
1801 }
1802
1803 /* looks up a users password for their connection class (<ALLOW>/<DENY> tags)
1804  * NOTE: If the <ALLOW> or <DENY> tag specifies an ip, and this user resolves,
1805  * then their ip will be taken as 'priority' anyway, so for example,
1806  * <connect allow="127.0.0.1"> will match joe!bloggs@localhost
1807  */
1808 ConnectClass* User::GetClass()
1809 {
1810         return this->MyClass;
1811 }
1812
1813 void User::PurgeEmptyChannels()
1814 {
1815         std::vector<Channel*> to_delete;
1816
1817         // firstly decrement the count on each channel
1818         for (UCListIter f = this->chans.begin(); f != this->chans.end(); f++)
1819         {
1820                 f->first->RemoveAllPrefixes(this);
1821                 if (f->first->DelUser(this) == 0)
1822                 {
1823                         /* No users left in here, mark it for deletion */
1824                         try
1825                         {
1826                                 to_delete.push_back(f->first);
1827                         }
1828                         catch (...)
1829                         {
1830                                 ServerInstance->Log(DEBUG,"Exception in User::PurgeEmptyChannels to_delete.push_back()");
1831                         }
1832                 }
1833         }
1834
1835         for (std::vector<Channel*>::iterator n = to_delete.begin(); n != to_delete.end(); n++)
1836         {
1837                 Channel* thischan = *n;
1838                 chan_hash::iterator i2 = ServerInstance->chanlist->find(thischan->name);
1839                 if (i2 != ServerInstance->chanlist->end())
1840                 {
1841                         FOREACH_MOD(I_OnChannelDelete,OnChannelDelete(i2->second));
1842                         delete i2->second;
1843                         ServerInstance->chanlist->erase(i2);
1844                         this->chans.erase(*n);
1845                 }
1846         }
1847
1848         this->UnOper();
1849 }
1850
1851 void User::ShowMOTD()
1852 {
1853         if (!ServerInstance->Config->MOTD.size())
1854         {
1855                 this->WriteServ("422 %s :Message of the day file is missing.",this->nick);
1856                 return;
1857         }
1858         this->WriteServ("375 %s :%s message of the day", this->nick, ServerInstance->Config->ServerName);
1859
1860         for (file_cache::iterator i = ServerInstance->Config->MOTD.begin(); i != ServerInstance->Config->MOTD.end(); i++)
1861                 this->WriteServ("372 %s :- %s",this->nick,i->c_str());
1862
1863         this->WriteServ("376 %s :End of message of the day.", this->nick);
1864 }
1865
1866 void User::ShowRULES()
1867 {
1868         if (!ServerInstance->Config->RULES.size())
1869         {
1870                 this->WriteServ("434 %s :RULES File is missing",this->nick);
1871                 return;
1872         }
1873
1874         this->WriteServ("308 %s :- %s Server Rules -",this->nick,ServerInstance->Config->ServerName);
1875
1876         for (file_cache::iterator i = ServerInstance->Config->RULES.begin(); i != ServerInstance->Config->RULES.end(); i++)
1877                 this->WriteServ("232 %s :- %s",this->nick,i->c_str());
1878
1879         this->WriteServ("309 %s :End of RULES command.",this->nick);
1880 }
1881
1882 void User::HandleEvent(EventType et, int errornum)
1883 {
1884         /* WARNING: May delete this user! */
1885         int thisfd = this->GetFd();
1886
1887         try
1888         {
1889                 switch (et)
1890                 {
1891                         case EVENT_READ:
1892                                 ServerInstance->ProcessUser(this);
1893                         break;
1894                         case EVENT_WRITE:
1895                                 this->FlushWriteBuf();
1896                         break;
1897                         case EVENT_ERROR:
1898                                 /** This should be safe, but dont DARE do anything after it -- Brain */
1899                                 this->SetWriteError(errornum ? strerror(errornum) : "EOF from client");
1900                         break;
1901                 }
1902         }
1903         catch (...)
1904         {
1905                 ServerInstance->Log(DEBUG,"Exception in User::HandleEvent intercepted");
1906         }
1907
1908         /* If the user has raised an error whilst being processed, quit them now we're safe to */
1909         if ((ServerInstance->SE->GetRef(thisfd) == this))
1910         {
1911                 if (!WriteError.empty())
1912                 {
1913                         User::QuitUser(ServerInstance, this, GetWriteError());
1914                 }
1915         }
1916 }
1917
1918 void User::SetOperQuit(const std::string &oquit)
1919 {
1920         if (operquit)
1921                 return;
1922
1923         operquit = strdup(oquit.c_str());
1924 }
1925
1926 const char* User::GetOperQuit()
1927 {
1928         return operquit ? operquit : "";
1929 }
1930
1931 void User::IncreasePenalty(int increase)
1932 {
1933         this->Penalty += increase;
1934 }
1935
1936 void User::DecreasePenalty(int decrease)
1937 {
1938         this->Penalty -= decrease;
1939 }
1940
1941 VisData::VisData()
1942 {
1943 }
1944
1945 VisData::~VisData()
1946 {
1947 }
1948
1949 bool VisData::VisibleTo(User* user)
1950 {
1951         return true;
1952 }
1953