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