src/users.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2008 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 */
  15
  16 #include "inspircd.h"
  17 #include <stdarg.h>
  18 #include "socketengine.h"
  19 #include "xline.h"
  20 #include "bancache.h"
  21 #include "commands/cmd_whowas.h"
  22
  23 /* XXX: Used for speeding up WriteCommon operations */
  24 unsigned long uniq_id = 1;
  25
  26 static unsigned long* already_sent = NULL;
  27
  28
  29 void InitializeAlreadySent(SocketEngine* SE)
  30 {
  31         already_sent = new unsigned long[SE->GetMaxFds()];
  32         memset(already_sent, 0, SE->GetMaxFds() * sizeof(unsigned long));
  33 }
  34
  35
  36 std::string User::ProcessNoticeMasks(const char *sm)
  37 {
  38         bool adding = true, oldadding = false;
  39         const char *c = sm;
  40         std::string output;
  41
  42         while (c && *c)
  43         {
  44                 switch (*c)
  45                 {
  46                         case '+':
  47                                 adding = true;
  48                         break;
  49                         case '-':
  50                                 adding = false;
  51                         break;
  52                         case '*':
  53                                 for (unsigned char d = 'A'; d <= 'z'; d++)
  54                                 {
  55                                         if (ServerInstance->SNO->IsEnabled(d))
  56                                         {
  57                                                 if ((!IsNoticeMaskSet(d) && adding) || (IsNoticeMaskSet(d) && !adding))
  58                                                 {
  59                                                         if ((oldadding != adding) || (!output.length()))
  60                                                                 output += (adding ? '+' : '-');
  61
  62                                                         this->SetNoticeMask(d, adding);
  63
  64                                                         output += d;
  65                                                 }
  66                                         }
  67                                         oldadding = adding;
  68                                 }
  69                         break;
  70                         default:
  71                                 if ((*c >= 'A') && (*c <= 'z') && (ServerInstance->SNO->IsEnabled(*c)))
  72                                 {
  73                                         if ((!IsNoticeMaskSet(*c) && adding) || (IsNoticeMaskSet(*c) && !adding))
  74                                         {
  75                                                 if ((oldadding != adding) || (!output.length()))
  76                                                         output += (adding ? '+' : '-');
  77
  78                                                 this->SetNoticeMask(*c, adding);
  79
  80                                                 output += *c;
  81                                         }
  82                                 }
  83                                 else
  84                                         this->WriteNumeric(ERR_UNKNOWNSNOMASK, "%s %c :is unknown snomask char to me", this->nick.c_str(), *c);
  85
  86                                 oldadding = adding;
  87                         break;
  88                 }
  89
  90                 *c++;
  91         }
  92
  93         return output;
  94 }
  95
  96 void User::StartDNSLookup()
  97 {
  98         try
  99         {
 100                 bool cached = false;
 101                 const char* sip = this->GetIPString(false);
 102                 UserResolver *res_reverse;
 103
 104                 /* Special case for 4in6 (Have i mentioned i HATE 4in6?) */
 105                 if (!strncmp(sip, "0::ffff:", 8))
 106                         res_reverse = new UserResolver(this->ServerInstance, this, sip + 8, DNS_QUERY_PTR4, cached);
 107                 else
 108                         res_reverse = new UserResolver(this->ServerInstance, this, sip, this->GetProtocolFamily() == AF_INET ? DNS_QUERY_PTR4 : DNS_QUERY_PTR6, cached);
 109
 110                 this->ServerInstance->AddResolver(res_reverse, cached);
 111         }
 112         catch (CoreException& e)
 113         {
 114                 ServerInstance->Logs->Log("USERS", DEBUG,"Error in resolver: %s",e.GetReason());
 115         }
 116 }
 117
 118 bool User::IsNoticeMaskSet(unsigned char sm)
 119 {
 120         if (!isalpha(sm))
 121                 return false;
 122         return (snomasks[sm-65]);
 123 }
 124
 125 void User::SetNoticeMask(unsigned char sm, bool value)
 126 {
 127         if (!isalpha(sm))
 128                 return;
 129         snomasks[sm-65] = value;
 130 }
 131
 132 const char* User::FormatNoticeMasks()
 133 {
 134         static char data[MAXBUF];
 135         int offset = 0;
 136
 137         for (int n = 0; n < 64; n++)
 138         {
 139                 if (snomasks[n])
 140                         data[offset++] = n+65;
 141         }
 142
 143         data[offset] = 0;
 144         return data;
 145 }
 146
 147 bool User::IsModeSet(unsigned char m)
 148 {
 149         if (!isalpha(m))
 150                 return false;
 151         return (modes[m-65]);
 152 }
 153
 154 void User::SetMode(unsigned char m, bool value)
 155 {
 156         if (!isalpha(m))
 157                 return;
 158         modes[m-65] = value;
 159 }
 160
 161 const char* User::FormatModes(bool showparameters)
 162 {
 163         static char data[MAXBUF];
 164         std::string params;
 165         int offset = 0;
 166
 167         for (unsigned char n = 0; n < 64; n++)
 168         {
 169                 if (modes[n])
 170                 {
 171                         data[offset++] = n + 65;
 172                         ModeHandler* mh = ServerInstance->Modes->FindMode(n + 65, MODETYPE_USER);
 173                         if (showparameters && mh && mh->GetNumParams(true))
 174                         {
 175                                 std::string p = mh->GetUserParameter(this);
 176                                 if (p.length())
 177                                         params.append(" ").append(p);
 178                         }
 179                 }
 180         }
 181         data[offset] = 0;
 182         strlcat(data, params.c_str(), MAXBUF);
 183         return data;
 184 }
 185
 186 void User::DecrementModes()
 187 {
 188         ServerInstance->Logs->Log("USERS", DEBUG, "DecrementModes()");
 189         for (unsigned char n = 'A'; n <= 'z'; n++)
 190         {
 191                 if (modes[n-65])
 192                 {
 193                         ServerInstance->Logs->Log("USERS", DEBUG,"DecrementModes() found mode %c", n);
 194                         ModeHandler* mh = ServerInstance->Modes->FindMode(n, MODETYPE_USER);
 195                         if (mh)
 196                         {
 197                                 ServerInstance->Logs->Log("USERS", DEBUG,"Found handler %c and call ChangeCount", n);
 198                                 mh->ChangeCount(-1);
 199                         }
 200                 }
 201         }
 202 }
 203
 204 User::User(InspIRCd* Instance, const std::string &uid) : ServerInstance(Instance)
 205 {
 206         server = (char*)Instance->FindServerNamePtr(Instance->Config->ServerName);
 207         reset_due = ServerInstance->Time();
 208         age = ServerInstance->Time();
 209         Penalty = 0;
 210         lines_in = lastping = signon = idle_lastmsg = nping = registered = 0;
 211         bytes_in = bytes_out = cmds_in = cmds_out = 0;
 212         quietquit = OverPenalty = ExemptFromPenalty = quitting = exempt = haspassed = dns_done = false;
 213         fd = -1;
 214         recvq.clear();
 215         sendq.clear();
 216         Visibility = NULL;
 217         ip = NULL;
 218         MyClass = NULL;
 219         AllowedOperCommands = NULL;
 220         chans.clear();
 221         invites.clear();
 222
 223         if (uid.empty())
 224                 uuid.assign(Instance->GetUID(), 0, UUID_LENGTH - 1);
 225         else
 226                 uuid.assign(uid, 0, UUID_LENGTH - 1);
 227
 228         ServerInstance->Logs->Log("USERS", DEBUG,"New UUID for user: %s (%s)", uuid.c_str(), uid.empty() ? "allocated new" : "used remote");
 229
 230         user_hash::iterator finduuid = Instance->Users->uuidlist->find(uuid);
 231         if (finduuid == Instance->Users->uuidlist->end())
 232                 (*Instance->Users->uuidlist)[uuid] = this;
 233         else
 234                 throw CoreException("Duplicate UUID "+std::string(uuid)+" in User constructor");
 235 }
 236
 237 User::~User()
 238 {
 239         /* NULL for remote users :) */
 240         if (this->MyClass)
 241         {
 242                 this->MyClass->RefCount--;
 243                 ServerInstance->Logs->Log("USERS", DEBUG, "User destructor -- connect refcount now: %lu", this->MyClass->RefCount);
 244         }
 245         if (this->AllowedOperCommands)
 246         {
 247                 delete AllowedOperCommands;
 248                 AllowedOperCommands = NULL;
 249         }
 250
 251         this->InvalidateCache();
 252         this->DecrementModes();
 253
 254         if (ip)
 255         {
 256                 ServerInstance->Users->RemoveCloneCounts(this);
 257
 258                 if (this->GetProtocolFamily() == AF_INET)
 259                 {
 260                         delete (sockaddr_in*)ip;
 261                 }
 262 #ifdef SUPPORT_IP6LINKS
 263                 else
 264                 {
 265                         delete (sockaddr_in6*)ip;
 266                 }
 267 #endif
 268         }
 269
 270         ServerInstance->Users->uuidlist->erase(uuid);
 271 }
 272
 273 const std::string& User::MakeHost()
 274 {
 275         if (!this->cached_makehost.empty())
 276                 return this->cached_makehost;
 277
 278         char nhost[MAXBUF];
 279         /* This is much faster than snprintf */
 280         char* t = nhost;
 281         for(const char* n = ident.c_str(); *n; n++)
 282                 *t++ = *n;
 283         *t++ = '@';
 284         for(const char* n = host.c_str(); *n; n++)
 285                 *t++ = *n;
 286         *t = 0;
 287
 288         this->cached_makehost.assign(nhost);
 289
 290         return this->cached_makehost;
 291 }
 292
 293 const std::string& User::MakeHostIP()
 294 {
 295         if (!this->cached_hostip.empty())
 296                 return this->cached_hostip;
 297
 298         char ihost[MAXBUF];
 299         /* This is much faster than snprintf */
 300         char* t = ihost;
 301         for(const char* n = ident.c_str(); *n; n++)
 302                 *t++ = *n;
 303         *t++ = '@';
 304         for(const char* n = this->GetIPString(); *n; n++)
 305                 *t++ = *n;
 306         *t = 0;
 307
 308         this->cached_hostip = ihost;
 309
 310         return this->cached_hostip;
 311 }
 312
 313 void User::CloseSocket()
 314 {
 315         if (this->fd > -1)
 316         {
 317                 ServerInstance->SE->Shutdown(this, 2);
 318                 ServerInstance->SE->Close(this);
 319         }
 320 }
 321
 322 const std::string& User::GetFullHost()
 323 {
 324         if (!this->cached_fullhost.empty())
 325                 return this->cached_fullhost;
 326
 327         char result[MAXBUF];
 328         char* t = result;
 329         for(const char* n = nick.c_str(); *n; n++)
 330                 *t++ = *n;
 331         *t++ = '!';
 332         for(const char* n = ident.c_str(); *n; n++)
 333                 *t++ = *n;
 334         *t++ = '@';
 335         for(const char* n = dhost.c_str(); *n; n++)
 336                 *t++ = *n;
 337         *t = 0;
 338
 339         this->cached_fullhost = result;
 340
 341         return this->cached_fullhost;
 342 }
 343
 344 char* User::MakeWildHost()
 345 {
 346         static char nresult[MAXBUF];
 347         char* t = nresult;
 348         *t++ = '*';     *t++ = '!';
 349         *t++ = '*';     *t++ = '@';
 350         for(const char* n = dhost.c_str(); *n; n++)
 351                 *t++ = *n;
 352         *t = 0;
 353         return nresult;
 354 }
 355
 356 int User::ReadData(void* buffer, size_t size)
 357 {
 358         if (IS_LOCAL(this))
 359         {
 360 #ifndef WIN32
 361                 return read(this->fd, buffer, size);
 362 #else
 363                 return recv(this->fd, (char*)buffer, size, 0);
 364 #endif
 365         }
 366         else
 367                 return 0;
 368 }
 369
 370
 371 const std::string& User::GetFullRealHost()
 372 {
 373         if (!this->cached_fullrealhost.empty())
 374                 return this->cached_fullrealhost;
 375
 376         char fresult[MAXBUF];
 377         char* t = fresult;
 378         for(const char* n = nick.c_str(); *n; n++)
 379                 *t++ = *n;
 380         *t++ = '!';
 381         for(const char* n = ident.c_str(); *n; n++)
 382                 *t++ = *n;
 383         *t++ = '@';
 384         for(const char* n = host.c_str(); *n; n++)
 385                 *t++ = *n;
 386         *t = 0;
 387
 388         this->cached_fullrealhost = fresult;
 389
 390         return this->cached_fullrealhost;
 391 }
 392
 393 bool User::IsInvited(const irc::string &channel)
 394 {
 395         time_t now = time(NULL);
 396         InvitedList::iterator safei;
 397         for (InvitedList::iterator i = invites.begin(); i != invites.end(); ++i)
 398         {
 399                 if (channel == i->first)
 400                 {
 401                         if (i->second != 0 && now > i->second)
 402                         {
 403                                 /* Expired invite, remove it. */
 404                                 safei = i;
 405                                 --i;
 406                                 invites.erase(safei);
 407                                 continue;
 408                         }
 409                         return true;
 410                 }
 411         }
 412         return false;
 413 }
 414
 415 InvitedList* User::GetInviteList()
 416 {
 417         time_t now = time(NULL);
 418         /* Weed out expired invites here. */
 419         InvitedList::iterator safei;
 420         for (InvitedList::iterator i = invites.begin(); i != invites.end(); ++i)
 421         {
 422                 if (i->second != 0 && now > i->second)
 423                 {
 424                         /* Expired invite, remove it. */
 425                         safei = i;
 426                         --i;
 427                         invites.erase(safei);
 428                 }
 429         }
 430         return &invites;
 431 }
 432
 433 void User::InviteTo(const irc::string &channel, time_t invtimeout)
 434 {
 435         time_t now = time(NULL);
 436         if (invtimeout != 0 && now > invtimeout) return; /* Don't add invites that are expired from the get-go. */
 437         for (InvitedList::iterator i = invites.begin(); i != invites.end(); ++i)
 438         {
 439                 if (channel == i->first)
 440                 {
 441                         if (i->second != 0 && invtimeout > i->second)
 442                         {
 443                                 i->second = invtimeout;
 444                         }
 445
 446                         return;
 447                 }
 448         }
 449         invites.push_back(std::make_pair(channel, invtimeout));
 450 }
 451
 452 void User::RemoveInvite(const irc::string &channel)
 453 {
 454         for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
 455         {
 456                 if (channel == i->first)
 457                 {
 458                         invites.erase(i);
 459                         return;
 460                 }
 461         }
 462 }
 463
 464 bool User::HasModePermission(unsigned char mode, ModeType type)
 465 {
 466         if (!IS_LOCAL(this))
 467                 return true;
 468
 469         if (!IS_OPER(this))
 470                 return false;
 471
 472         if (mode < 'A' || mode > ('A' + 64)) return false;
 473
 474         return ((type == MODETYPE_USER ? AllowedUserModes : AllowedChanModes))[(mode - 'A')];
 475
 476 }
 477
 478 bool User::HasPermission(const std::string &command)
 479 {
 480         /*
 481          * users on remote servers can completely bypass all permissions based checks.
 482          * This prevents desyncs when one server has different type/class tags to another.
 483          * That having been said, this does open things up to the possibility of source changes
 484          * allowing remote kills, etc - but if they have access to the src, they most likely have
 485          * access to the conf - so it's an end to a means either way.
 486          */
 487         if (!IS_LOCAL(this))
 488                 return true;
 489
 490         // are they even an oper at all?
 491         if (!IS_OPER(this))
 492         {
 493                 return false;
 494         }
 495
 496         if (!AllowedOperCommands)
 497                 return false;
 498
 499         if (AllowedOperCommands->find(command) != AllowedOperCommands->end())
 500                 return true;
 501         else if (AllowedOperCommands->find("*") != AllowedOperCommands->end())
 502                 return true;
 503
 504         return false;
 505 }
 506
 507 bool User::AddBuffer(const std::string &a)
 508 {
 509         std::string::size_type start = 0;
 510         std::string::size_type i = a.find('\r');
 511
 512         /*
 513          * The old implementation here took a copy, and rfind() on \r, removing as it found them, before
 514          * copying a second time onto the recvq. That's ok, but involves three copies minimum (recv() to buffer,
 515          * buffer to here, here to recvq) - The new method now copies twice (recv() to buffer, buffer to recvq).
 516          *
 517          * We use find() instead of rfind() for clarity, however unlike the old code, our scanning of the string is
 518          * contiguous: as we specify a startpoint, we never see characters we have scanned previously, making this
 519          * marginally faster in cases with a number of \r hidden early on in the buffer.
 520          *
 521          * How it works:
 522          * Start at first pos of string, find first \r, append everything in the chunk (excluding \r) to recvq. Set
 523          * i ahead of the \r, search for next \r, add next chunk to buffer... repeat.
 524          *              -- w00t (7 may, 2008)
 525          */
 526         if (i == std::string::npos)
 527         {
 528                 // no \r that we need to dance around, just add to buffer
 529                 recvq.append(a);
 530         }
 531         else
 532         {
 533                 // While we can find the end of a chunk to add
 534                 while (i != std::string::npos)
 535                 {
 536                         // Append the chunk that we have
 537                         recvq.append(a, start, (i - start));
 538
 539                         // Start looking for the next one
 540                         start = i + 1;
 541                         i = a.find('\r', start);
 542                 }
 543
 544                 if (start != a.length())
 545                 {
 546                         /*
 547                          * This is here to catch a corner case when we get something like:
 548                          * NICK w0
 549                          * 0t\r\nU
 550                          * SER ...
 551                          * in successive calls to us.
 552                          *
 553                          * Without this conditional, the 'U' on the second case will be dropped,
 554                          * which is most *certainly* not the behaviour we want!
 555                          *              -- w00t
 556                          */
 557                         recvq.append(a, start, (a.length() - start));
 558                 }
 559         }
 560
 561         if (this->MyClass && (recvq.length() > this->MyClass->GetRecvqMax()))
 562         {
 563                 ServerInstance->Users->QuitUser(this, "RecvQ exceeded");
 564                 ServerInstance->SNO->WriteToSnoMask('A', "User %s RecvQ of %lu exceeds connect class maximum of %lu",this->nick.c_str(),(unsigned long int)recvq.length(),this->MyClass->GetRecvqMax());
 565                 return false;
 566         }
 567
 568         return true;
 569 }
 570
 571 bool User::BufferIsReady()
 572 {
 573         return (recvq.find('\n') != std::string::npos);
 574 }
 575
 576 void User::ClearBuffer()
 577 {
 578         recvq.clear();
 579 }
 580
 581 std::string User::GetBuffer()
 582 {
 583         try
 584         {
 585                 if (recvq.empty())
 586                         return "";
 587
 588                 /* Strip any leading \r or \n off the string.
 589                  * Usually there are only one or two of these,
 590                  * so its is computationally cheap to do.
 591                  */
 592                 std::string::iterator t = recvq.begin();
 593                 while (t != recvq.end() && (*t == '\r' || *t == '\n'))
 594                 {
 595                         recvq.erase(t);
 596                         t = recvq.begin();
 597                 }
 598
 599                 for (std::string::iterator x = recvq.begin(); x != recvq.end(); x++)
 600                 {
 601                         /* Find the first complete line, return it as the
 602                          * result, and leave the recvq as whats left
 603                          */
 604                         if (*x == '\n')
 605                         {
 606                                 std::string ret = std::string(recvq.begin(), x);
 607                                 recvq.erase(recvq.begin(), x + 1);
 608                                 return ret;
 609                         }
 610                 }
 611                 return "";
 612         }
 613
 614         catch (...)
 615         {
 616                 ServerInstance->Logs->Log("USERS", DEBUG,"Exception in User::GetBuffer()");
 617                 return "";
 618         }
 619 }
 620
 621 void User::AddWriteBuf(const std::string &data)
 622 {
 623         if (this->quitting)
 624                 return;
 625
 626         if (this->MyClass && (sendq.length() + data.length() > this->MyClass->GetSendqMax()))
 627         {
 628                 /*
 629                  * Fix by brain - Set the error text BEFORE calling, because
 630                  * if we dont it'll recursively  call here over and over again trying
 631                  * to repeatedly add the text to the sendq!
 632                  */
 633                 ServerInstance->Users->QuitUser(this, "SendQ exceeded");
 634                 ServerInstance->SNO->WriteToSnoMask('A', "User %s SendQ of %lu exceeds connect class maximum of %lu",this->nick.c_str(),(unsigned long int)sendq.length() + data.length(),this->MyClass->GetSendqMax());
 635                 return;
 636         }
 637
 638         if (data.length() > MAXBUF - 2) /* MAXBUF has a value of 514, to account for line terminators */
 639                 sendq.append(data.substr(0,MAXBUF - 4)).append("\r\n"); /* MAXBUF-4 = 510 */
 640         else
 641                 sendq.append(data);
 642 }
 643
 644 // send AS MUCH OF THE USERS SENDQ as we are able to (might not be all of it)
 645 void User::FlushWriteBuf()
 646 {
 647         if (this->fd == FD_MAGIC_NUMBER)
 648         {
 649                 sendq.clear();
 650                 return;
 651         }
 652
 653         if ((sendq.length()) && (this->fd != FD_MAGIC_NUMBER))
 654         {
 655                 int old_sendq_length = sendq.length();
 656                 int n_sent = ServerInstance->SE->Send(this, this->sendq.data(), this->sendq.length(), 0);
 657
 658                 if (n_sent == -1)
 659                 {
 660                         if (errno == EAGAIN)
 661                         {
 662                                 /* The socket buffer is full. This isnt fatal,
 663                                  * try again later.
 664                                  */
 665                                 ServerInstance->SE->WantWrite(this);
 666                         }
 667                         else
 668                         {
 669                                 /* Fatal error, set write error and bail */
 670                                 ServerInstance->Users->QuitUser(this, errno ? strerror(errno) : "Write error");
 671                                 return;
 672                         }
 673                 }
 674                 else
 675                 {
 676                         /* advance the queue */
 677                         if (n_sent)
 678                                 this->sendq = this->sendq.substr(n_sent);
 679                         /* update the user's stats counters */
 680                         this->bytes_out += n_sent;
 681                         this->cmds_out++;
 682                         if (n_sent != old_sendq_length)
 683                                 this->ServerInstance->SE->WantWrite(this);
 684                 }
 685         }
 686
 687         /* note: NOT else if! */
 688         if (this->sendq.empty())
 689         {
 690                 FOREACH_MOD(I_OnBufferFlushed,OnBufferFlushed(this));
 691         }
 692 }
 693
 694 void User::Oper(const std::string &opertype, const std::string &opername)
 695 {
 696         if (this->IsModeSet('o'))
 697                 this->UnOper();
 698
 699         this->modes[UM_OPERATOR] = 1;
 700         this->WriteServ("MODE %s :+o", this->nick.c_str());
 701         FOREACH_MOD(I_OnOper, OnOper(this, opertype));
 702
 703         ServerInstance->SNO->WriteToSnoMask('o',"%s (%s@%s) is now an IRC operator of type %s (using oper '%s')", this->nick.c_str(), this->ident.c_str(), this->host.c_str(), irc::Spacify(opertype.c_str()), opername.c_str());
 704         this->WriteNumeric(381, "%s :You are now %s %s", this->nick.c_str(), strchr("aeiouAEIOU", *opertype.c_str()) ? "an" : "a", irc::Spacify(opertype.c_str()));
 705
 706         ServerInstance->Logs->Log("OPER", DEFAULT, "%s!%s@%s opered as type: %s", this->nick.c_str(), this->ident.c_str(), this->host.c_str(), opertype.c_str());
 707         this->oper.assign(opertype, 0, 512);
 708         ServerInstance->Users->all_opers.push_back(this);
 709
 710         opertype_t::iterator iter_opertype = ServerInstance->Config->opertypes.find(this->oper.c_str());
 711         if (iter_opertype != ServerInstance->Config->opertypes.end())
 712         {
 713
 714                 if (AllowedOperCommands)
 715                         AllowedOperCommands->clear();
 716                 else
 717                         AllowedOperCommands = new std::map<std::string, bool>;
 718
 719                 AllowedUserModes.reset();
 720                 AllowedChanModes.reset();
 721                 this->AllowedUserModes['o' - 'A'] = true; // Call me paranoid if you want.
 722
 723                 std::string myclass, mycmd;
 724                 irc::spacesepstream Classes(iter_opertype->second);
 725                 while (Classes.GetToken(myclass))
 726                 {
 727                         operclass_t::iterator iter_operclass = ServerInstance->Config->operclass.find(myclass.c_str());
 728                         if (iter_operclass != ServerInstance->Config->operclass.end())
 729                         {
 730                                 irc::spacesepstream CommandList(iter_operclass->second.commandlist);
 731                                 while (CommandList.GetToken(mycmd))
 732                                 {
 733                                         this->AllowedOperCommands->insert(std::make_pair(mycmd, true));
 734                                 }
 735                                 for (unsigned char* c = (unsigned char*)iter_operclass->second.umodelist; *c; ++c)
 736                                 {
 737                                         if (*c == '*')
 738                                         {
 739                                                 this->AllowedUserModes.set();
 740                                         }
 741                                         else
 742                                         {
 743                                                 this->AllowedUserModes[*c - 'A'] = true;
 744                                         }
 745                                 }
 746                                 for (unsigned char* c = (unsigned char*)iter_operclass->second.cmodelist; *c; ++c)
 747                                 {
 748                                         if (*c == '*')
 749                                         {
 750                                                 this->AllowedChanModes.set();
 751                                         }
 752                                         else
 753                                         {
 754                                                 this->AllowedChanModes[*c - 'A'] = true;
 755                                         }
 756                                 }
 757                         }
 758                 }
 759         }
 760
 761         FOREACH_MOD(I_OnPostOper,OnPostOper(this, opertype, opername));
 762 }
 763
 764 void User::UnOper()
 765 {
 766         if (IS_OPER(this))
 767         {
 768                 /*
 769                  * unset their oper type (what IS_OPER checks).
 770                  * note, order is important - this must come before modes as -o attempts
 771                  * to call UnOper. -- w00t
 772                  */
 773                 this->oper.clear();
 774
 775                 /* Remove all oper only modes from the user when the deoper - Bug #466*/
 776                 std::string moderemove("-");
 777
 778                 for (unsigned char letter = 'A'; letter <= 'z'; letter++)
 779                 {
 780                         ModeHandler* mh = ServerInstance->Modes->FindMode(letter, MODETYPE_USER);
 781                         if (mh && mh->NeedsOper())
 782                                 moderemove += letter;
 783                 }
 784
 785                 std::vector<std::string> parameters;
 786                 parameters.push_back(this->nick);
 787                 parameters.push_back(moderemove);
 788
 789                 ServerInstance->Parser->CallHandler("MODE", parameters, this);
 790
 791                 /* remove the user from the oper list. Will remove multiple entries as a safeguard against bug #404 */
 792                 ServerInstance->Users->all_opers.remove(this);
 793
 794                 if (AllowedOperCommands)
 795                 {
 796                         delete AllowedOperCommands;
 797                         AllowedOperCommands = NULL;
 798                 }
 799
 800                 AllowedUserModes.reset();
 801                 AllowedChanModes.reset();
 802         }
 803 }
 804
 805 /* adds or updates an entry in the whowas list */
 806 void User::AddToWhoWas()
 807 {
 808         Command* whowas_command = ServerInstance->Parser->GetHandler("WHOWAS");
 809         if (whowas_command)
 810         {
 811                 std::deque<classbase*> params;
 812                 params.push_back(this);
 813                 whowas_command->HandleInternal(WHOWAS_ADD, params);
 814         }
 815 }
 816
 817 /*
 818  * Check class restrictions
 819  */
 820 void User::CheckClass()
 821 {
 822         ConnectClass* a = this->MyClass;
 823
 824         if ((!a) || (a->GetType() == CC_DENY))
 825         {
 826                 ServerInstance->Users->QuitUser(this, "Unauthorised connection");
 827                 return;
 828         }
 829         else if ((a->GetMaxLocal()) && (ServerInstance->Users->LocalCloneCount(this) > a->GetMaxLocal()))
 830         {
 831                 ServerInstance->Users->QuitUser(this, "No more connections allowed from your host via this connect class (local)");
 832                 ServerInstance->SNO->WriteToSnoMask('A', "WARNING: maximum LOCAL connections (%ld) exceeded for IP %s", a->GetMaxLocal(), this->GetIPString());
 833                 return;
 834         }
 835         else if ((a->GetMaxGlobal()) && (ServerInstance->Users->GlobalCloneCount(this) > a->GetMaxGlobal()))
 836         {
 837                 ServerInstance->Users->QuitUser(this, "No more connections allowed from your host via this connect class (global)");
 838                 ServerInstance->SNO->WriteToSnoMask('A', "WARNING: maximum GLOBAL connections (%ld) exceeded for IP %s", a->GetMaxGlobal(), this->GetIPString());
 839                 return;
 840         }
 841
 842         this->nping = ServerInstance->Time() + a->GetPingTime() + ServerInstance->Config->dns_timeout;
 843 }
 844
 845 bool User::CheckLines(bool doZline)
 846 {
 847         const char* check[] = { "G" , "K", (doZline) ? "Z" : NULL, NULL };
 848
 849         if (!this->exempt)
 850         {
 851                 for (int n = 0; check[n]; ++n)
 852                 {
 853                         XLine *r = ServerInstance->XLines->MatchesLine(check[n], this);
 854
 855                         if (r)
 856                         {
 857                                 r->Apply(this);
 858                                 return true;
 859                         }
 860                 }
 861         }
 862
 863         return false;
 864 }
 865
 866 void User::FullConnect()
 867 {
 868         ServerInstance->stats->statsConnects++;
 869         this->idle_lastmsg = ServerInstance->Time();
 870
 871         /*
 872          * You may be thinking "wtf, we checked this in User::AddClient!" - and yes, we did, BUT.
 873          * At the time AddClient is called, we don't have a resolved host, by here we probably do - which
 874          * may put the user into a totally seperate class with different restrictions! so we *must* check again.
 875          * Don't remove this! -- w00t
 876          */
 877         this->SetClass();
 878
 879         /* Check the password, if one is required by the user's connect class.
 880          * This CANNOT be in CheckClass(), because that is called prior to PASS as well!
 881          */
 882         if (this->MyClass && !this->MyClass->GetPass().empty() && !this->haspassed)
 883         {
 884                 ServerInstance->Users->QuitUser(this, "Invalid password");
 885                 return;
 886         }
 887
 888         if (this->CheckLines())
 889                 return;
 890
 891         this->WriteServ("NOTICE Auth :Welcome to \002%s\002!",ServerInstance->Config->Network);
 892         this->WriteNumeric(RPL_WELCOME, "%s :Welcome to the %s IRC Network %s!%s@%s",this->nick.c_str(), ServerInstance->Config->Network, this->nick.c_str(), this->ident.c_str(), this->host.c_str());
 893         this->WriteNumeric(RPL_YOURHOSTIS, "%s :Your host is %s, running version InspIRCd-1.2",this->nick.c_str(),ServerInstance->Config->ServerName);
 894         this->WriteNumeric(RPL_SERVERCREATED, "%s :This server was created %s %s", this->nick.c_str(), __TIME__, __DATE__);
 895         this->WriteNumeric(RPL_SERVERVERSION, "%s %s InspIRCd-1.2 %s %s %s", this->nick.c_str(), ServerInstance->Config->ServerName, ServerInstance->Modes->UserModeList().c_str(), ServerInstance->Modes->ChannelModeList().c_str(), ServerInstance->Modes->ParaModeList().c_str());
 896
 897         ServerInstance->Config->Send005(this);
 898         this->WriteNumeric(RPL_YOURUUID, "%s %s :your unique ID", this->nick.c_str(), this->uuid.c_str());
 899
 900
 901         this->ShowMOTD();
 902
 903         /* Now registered */
 904         if (ServerInstance->Users->unregistered_count)
 905                 ServerInstance->Users->unregistered_count--;
 906
 907         /* Trigger LUSERS output, give modules a chance too */
 908         int MOD_RESULT = 0;
 909         std::string command("LUSERS");
 910         std::vector<std::string> parameters;
 911         FOREACH_RESULT(I_OnPreCommand, OnPreCommand(command, parameters, this, true, "LUSERS"));
 912         if (!MOD_RESULT)
 913                 ServerInstance->CallCommandHandler(command, parameters, this);
 914
 915         /*
 916          * We don't set REG_ALL until triggering OnUserConnect, so some module events don't spew out stuff
 917          * for a user that doesn't exist yet.
 918          */
 919         FOREACH_MOD(I_OnUserConnect,OnUserConnect(this));
 920
 921         this->registered = REG_ALL;
 922
 923         ServerInstance->PI->Introduce(this);
 924
 925         FOREACH_MOD(I_OnPostConnect,OnPostConnect(this));
 926
 927         ServerInstance->SNO->WriteToSnoMask('c',"Client connecting on port %d: %s!%s@%s [%s] [%s]", this->GetPort(), this->nick.c_str(), this->ident.c_str(), this->host.c_str(), this->GetIPString(), this->fullname.c_str());
 928         ServerInstance->Logs->Log("BANCACHE", DEBUG, "BanCache: Adding NEGATIVE hit for %s", this->GetIPString());
 929         ServerInstance->BanCache->AddHit(this->GetIPString(), "", "");
 930 }
 931
 932 /** User::UpdateNick()
 933  * re-allocates a nick in the user_hash after they change nicknames,
 934  * returns a pointer to the new user as it may have moved
 935  */
 936 User* User::UpdateNickHash(const char* New)
 937 {
 938         //user_hash::iterator newnick;
 939         user_hash::iterator oldnick = ServerInstance->Users->clientlist->find(this->nick);
 940
 941         if (!irc::string(this->nick.c_str()).compare(New))
 942                 return oldnick->second;
 943
 944         if (oldnick == ServerInstance->Users->clientlist->end())
 945                 return NULL; /* doesnt exist */
 946
 947         User* olduser = oldnick->second;
 948         ServerInstance->Users->clientlist->erase(oldnick);
 949         (*(ServerInstance->Users->clientlist))[New] = olduser;
 950         return olduser;
 951 }
 952
 953 void User::InvalidateCache()
 954 {
 955         /* Invalidate cache */
 956         cached_fullhost.clear();
 957         cached_hostip.clear();
 958         cached_makehost.clear();
 959         cached_fullrealhost.clear();
 960 }
 961
 962 bool User::ForceNickChange(const char* newnick)
 963 {
 964         int MOD_RESULT = 0;
 965
 966         this->InvalidateCache();
 967
 968         FOREACH_RESULT(I_OnUserPreNick,OnUserPreNick(this, newnick));
 969
 970         if (MOD_RESULT)
 971         {
 972                 ServerInstance->stats->statsCollisions++;
 973                 return false;
 974         }
 975
 976         std::deque<classbase*> dummy;
 977         Command* nickhandler = ServerInstance->Parser->GetHandler("NICK");
 978         if (nickhandler) // wtfbbq, when would this not be here
 979         {
 980                 std::vector<std::string> parameters;
 981                 nickhandler->HandleInternal(1, dummy);
 982                 parameters.push_back(newnick);
 983                 bool result = (ServerInstance->Parser->CallHandler("NICK", parameters, this) == CMD_SUCCESS);
 984                 nickhandler->HandleInternal(0, dummy);
 985                 return result;
 986         }
 987
 988         // Unreachable, we hope
 989         return false;
 990 }
 991
 992 void User::SetSockAddr(int protocol_family, const char* sip, int port)
 993 {
 994         this->cachedip = "";
 995
 996         switch (protocol_family)
 997         {
 998 #ifdef SUPPORT_IP6LINKS
 999                 case AF_INET6:
1000                 {
1001                         sockaddr_in6* sin = new sockaddr_in6;
1002                         sin->sin6_family = AF_INET6;
1003                         sin->sin6_port = port;
1004                         inet_pton(AF_INET6, sip, &sin->sin6_addr);
1005                         this->ip = (sockaddr*)sin;
1006                 }
1007                 break;
1008 #endif
1009                 case AF_INET:
1010                 {
1011                         sockaddr_in* sin = new sockaddr_in;
1012                         sin->sin_family = AF_INET;
1013                         sin->sin_port = port;
1014                         inet_pton(AF_INET, sip, &sin->sin_addr);
1015                         this->ip = (sockaddr*)sin;
1016                 }
1017                 break;
1018                 default:
1019                         ServerInstance->Logs->Log("USERS",DEBUG,"Uh oh, I dont know protocol %d to be set on '%s'!", protocol_family, this->nick.c_str());
1020                 break;
1021         }
1022 }
1023
1024 int User::GetPort()
1025 {
1026         if (this->ip == NULL)
1027                 return 0;
1028
1029         switch (this->GetProtocolFamily())
1030         {
1031 #ifdef SUPPORT_IP6LINKS
1032                 case AF_INET6:
1033                 {
1034                         sockaddr_in6* sin = (sockaddr_in6*)this->ip;
1035                         return sin->sin6_port;
1036                 }
1037                 break;
1038 #endif
1039                 case AF_INET:
1040                 {
1041                         sockaddr_in* sin = (sockaddr_in*)this->ip;
1042                         return sin->sin_port;
1043                 }
1044                 break;
1045                 default:
1046                 break;
1047         }
1048         return 0;
1049 }
1050
1051 int User::GetProtocolFamily()
1052 {
1053         if (this->ip == NULL)
1054                 return 0;
1055
1056         sockaddr_in* sin = (sockaddr_in*)this->ip;
1057         return sin->sin_family;
1058 }
1059
1060 const char* User::GetCIDRMask(int range)
1061 {
1062         static char buf[44];
1063
1064         if (this->ip == NULL)
1065                 return "";
1066
1067         if (range < 0)
1068                 throw "Negative range, sorry, no.";
1069
1070         /*
1071          * Original code written by Oliver Lupton (Om).
1072          * Integrated by me. Thanks. :) -- w00t
1073          */
1074         switch (this->GetProtocolFamily())
1075         {
1076 #ifdef SUPPORT_IP6LINKS
1077                 case AF_INET6:
1078                 {
1079                         /* unsigned char s6_addr[16]; */
1080                         struct in6_addr v6;
1081                         sockaddr_in6* sin;
1082                         int i, bytestozero, extrabits;
1083                         char buffer[40];
1084
1085                         if(range > 128)
1086                                 throw "CIDR mask width greater than address width (IPv6, 128 bit)";
1087
1088                         /* Access the user's IP structure directly */
1089                         sin = (sockaddr_in6*)this->ip;
1090
1091                         /* To create the CIDR mask we want to set all the bits after 'range' bits of the address
1092                          * to zero. This means the last (128 - range) bits of the address must be set to zero.
1093                          * Hence this number divided by 8 is the number of whole bytes from the end of the address
1094                          * which must be set to zero.
1095                          */
1096                         bytestozero = (128 - range) / 8;
1097
1098                         /* Some of the least significant bits of the next most significant byte may also have to
1099                          * be zeroed. The number of bits is the remainder of the above division.
1100                          */
1101                         extrabits = (128 - range) % 8;
1102
1103                         /* Populate our working struct with the parts of the user's IP which are required in the
1104                          * final CIDR mask. Set all the subsequent bytes to zero.
1105                          * (16 - bytestozero) is the number of bytes which must be populated with actual IP data.
1106                          */
1107                         for(i = 0; i < (16 - bytestozero); i++)
1108                         {
1109                                 v6.s6_addr[i] = sin->sin6_addr.s6_addr[i];
1110                         }
1111
1112                         /* And zero all the remaining bytes in the IP. */
1113                         for(; i < 16; i++)
1114                         {
1115                                 v6.s6_addr[i] = 0;
1116                         }
1117
1118                         /* And finally, zero the extra bits required. */
1119                         v6.s6_addr[15 - bytestozero] = (v6.s6_addr[15 - bytestozero] >> extrabits) << extrabits;
1120
1121                         snprintf(buf, 44, "%s/%d", inet_ntop(AF_INET6, &v6, buffer, 40), range);
1122                         return buf;
1123                 }
1124                 break;
1125 #endif
1126                 case AF_INET:
1127                 {
1128                         struct in_addr v4;
1129                         sockaddr_in* sin;
1130                         char buffer[16];
1131
1132                         if (range > 32)
1133                                 throw "CIDR mask width greater than address width (IPv4, 32 bit)";
1134
1135                         /* Users already have a sockaddr* pointer (User::ip) which contains either a v4 or v6 structure */
1136                         sin = (sockaddr_in*)this->ip;
1137                         v4.s_addr = sin->sin_addr.s_addr;
1138
1139                         /* To create the CIDR mask we want to set all the bits after 'range' bits of the address
1140                          * to zero. This means the last (32 - range) bits of the address must be set to zero.
1141                          * This is done by shifting the value right and then back left by (32 - range) bits.
1142                          */
1143                         if(range > 0)
1144                         {
1145                                 v4.s_addr = ntohl(v4.s_addr);
1146                                 v4.s_addr = (v4.s_addr >> (32 - range)) << (32 - range);
1147                                 v4.s_addr = htonl(v4.s_addr);
1148                         }
1149                         else
1150                         {
1151                                 /* a range of zero would cause a 32 bit value to be shifted by 32 bits.
1152                                  * this has undefined behaviour, but for CIDR purposes the resulting mask
1153                                  * from a.b.c.d/0 is 0.0.0.0/0
1154                                  */
1155                                 v4.s_addr = 0;
1156                         }
1157
1158                         snprintf(buf, 44, "%s/%d", inet_ntop(AF_INET, &v4, buffer, 16), range);
1159                         return buf;
1160                 }
1161                 break;
1162         }
1163
1164         return ""; // unused, but oh well
1165 }
1166
1167 const char* User::GetIPString(bool translate4in6)
1168 {
1169         static char buf[40];
1170
1171         if (this->ip == NULL)
1172                 return "";
1173
1174         if (!this->cachedip.empty())
1175                 return this->cachedip.c_str();
1176
1177         switch (this->GetProtocolFamily())
1178         {
1179 #ifdef SUPPORT_IP6LINKS
1180                 case AF_INET6:
1181                 {
1182                         static char temp[1024];
1183
1184                         sockaddr_in6* sin = (sockaddr_in6*)this->ip;
1185                         inet_ntop(sin->sin6_family, &sin->sin6_addr, buf, sizeof(buf));
1186                         /* IP addresses starting with a : on irc are a Bad Thing (tm) */
1187                         if (*buf == ':')
1188                         {
1189                                 strlcpy(&temp[1], buf, sizeof(temp) - 1);
1190                                 *temp = '0';
1191                                 if (translate4in6 && !strncmp(temp, "0::ffff:", 8))
1192                                 {
1193                                         this->cachedip = temp + 8;
1194                                         return temp + 8;
1195                                 }
1196
1197                                 this->cachedip = temp;
1198                                 return temp;
1199                         }
1200
1201                         this->cachedip = buf;
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                         this->cachedip = buf;
1211                         return buf;
1212                 }
1213                 break;
1214                 default:
1215                 break;
1216         }
1217
1218         // Unreachable, probably
1219         return "";
1220 }
1221
1222 /** NOTE: We cannot pass a const reference to this method.
1223  * The string is changed by the workings of the method,
1224  * so that if we pass const ref, we end up copying it to
1225  * something we can change anyway. Makes sense to just let
1226  * the compiler do that copy for us.
1227  */
1228 void User::Write(std::string text)
1229 {
1230         if (!ServerInstance->SE->BoundsCheckFd(this))
1231                 return;
1232
1233         try
1234         {
1235                 ServerInstance->Logs->Log("USEROUTPUT", DEBUG,"C[%d] O %s", this->GetFd(), text.c_str());
1236                 text.append("\r\n");
1237         }
1238         catch (...)
1239         {
1240                 ServerInstance->Logs->Log("USEROUTPUT", DEBUG,"Exception in User::Write() std::string::append");
1241                 return;
1242         }
1243
1244         if (this->GetIOHook())
1245         {
1246                 /* XXX: The lack of buffering here is NOT a bug, modules implementing this interface have to
1247                  * implement their own buffering mechanisms
1248                  */
1249                 try
1250                 {
1251                         this->GetIOHook()->OnRawSocketWrite(this->fd, text.data(), text.length());
1252                 }
1253                 catch (CoreException& modexcept)
1254                 {
1255                         ServerInstance->Logs->Log("USEROUTPUT", DEBUG, "%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
1256                 }
1257         }
1258         else
1259         {
1260                 this->AddWriteBuf(text);
1261         }
1262         ServerInstance->stats->statsSent += text.length();
1263         this->ServerInstance->SE->WantWrite(this);
1264 }
1265
1266 /** Write()
1267  */
1268 void User::Write(const char *text, ...)
1269 {
1270         va_list argsPtr;
1271         char textbuffer[MAXBUF];
1272
1273         va_start(argsPtr, text);
1274         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1275         va_end(argsPtr);
1276
1277         this->Write(std::string(textbuffer));
1278 }
1279
1280 void User::WriteServ(const std::string& text)
1281 {
1282         char textbuffer[MAXBUF];
1283
1284         snprintf(textbuffer,MAXBUF,":%s %s",ServerInstance->Config->ServerName,text.c_str());
1285         this->Write(std::string(textbuffer));
1286 }
1287
1288 /** WriteServ()
1289  *  Same as Write(), except `text' is prefixed with `:server.name '.
1290  */
1291 void User::WriteServ(const char* text, ...)
1292 {
1293         va_list argsPtr;
1294         char textbuffer[MAXBUF];
1295
1296         va_start(argsPtr, text);
1297         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1298         va_end(argsPtr);
1299
1300         this->WriteServ(std::string(textbuffer));
1301 }
1302
1303
1304 void User::WriteNumeric(unsigned int numeric, 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->WriteNumeric(numeric, std::string(textbuffer));
1314 }
1315
1316 void User::WriteNumeric(unsigned int numeric, const std::string &text)
1317 {
1318         char textbuffer[MAXBUF];
1319         int MOD_RESULT = 0;
1320
1321         FOREACH_RESULT(I_OnNumeric, OnNumeric(this, numeric, text));
1322
1323         if (MOD_RESULT)
1324                 return;
1325
1326         snprintf(textbuffer,MAXBUF,":%s %03u %s",ServerInstance->Config->ServerName, numeric, text.c_str());
1327         this->Write(std::string(textbuffer));
1328 }
1329
1330 void User::WriteFrom(User *user, const std::string &text)
1331 {
1332         char tb[MAXBUF];
1333
1334         snprintf(tb,MAXBUF,":%s %s",user->GetFullHost().c_str(),text.c_str());
1335
1336         this->Write(std::string(tb));
1337 }
1338
1339
1340 /* write text from an originating user to originating user */
1341
1342 void User::WriteFrom(User *user, const char* text, ...)
1343 {
1344         va_list argsPtr;
1345         char textbuffer[MAXBUF];
1346
1347         va_start(argsPtr, text);
1348         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1349         va_end(argsPtr);
1350
1351         this->WriteFrom(user, std::string(textbuffer));
1352 }
1353
1354
1355 /* write text to an destination user from a source user (e.g. user privmsg) */
1356
1357 void User::WriteTo(User *dest, const char *data, ...)
1358 {
1359         char textbuffer[MAXBUF];
1360         va_list argsPtr;
1361
1362         va_start(argsPtr, data);
1363         vsnprintf(textbuffer, MAXBUF, data, argsPtr);
1364         va_end(argsPtr);
1365
1366         this->WriteTo(dest, std::string(textbuffer));
1367 }
1368
1369 void User::WriteTo(User *dest, const std::string &data)
1370 {
1371         dest->WriteFrom(this, data);
1372 }
1373
1374
1375 void User::WriteCommon(const char* text, ...)
1376 {
1377         char textbuffer[MAXBUF];
1378         va_list argsPtr;
1379
1380         if (this->registered != REG_ALL)
1381                 return;
1382
1383         va_start(argsPtr, text);
1384         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1385         va_end(argsPtr);
1386
1387         this->WriteCommon(std::string(textbuffer));
1388 }
1389
1390 void User::WriteCommon(const std::string &text)
1391 {
1392         bool sent_to_at_least_one = false;
1393         char tb[MAXBUF];
1394
1395         if (this->registered != REG_ALL)
1396                 return;
1397
1398         uniq_id++;
1399
1400         if (!already_sent)
1401                 InitializeAlreadySent(ServerInstance->SE);
1402
1403         /* We dont want to be doing this n times, just once */
1404         snprintf(tb,MAXBUF,":%s %s",this->GetFullHost().c_str(),text.c_str());
1405         std::string out = tb;
1406
1407         for (UCListIter v = this->chans.begin(); v != this->chans.end(); v++)
1408         {
1409                 CUList* ulist = v->first->GetUsers();
1410                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1411                 {
1412                         if ((IS_LOCAL(i->first)) && (already_sent[i->first->fd] != uniq_id))
1413                         {
1414                                 already_sent[i->first->fd] = uniq_id;
1415                                 i->first->Write(out);
1416                                 sent_to_at_least_one = true;
1417                         }
1418                 }
1419         }
1420
1421         /*
1422          * if the user was not in any channels, no users will receive the text. Make sure the user
1423          * receives their OWN message for WriteCommon
1424          */
1425         if (!sent_to_at_least_one)
1426         {
1427                 this->Write(std::string(tb));
1428         }
1429 }
1430
1431
1432 /* write a formatted string to all users who share at least one common
1433  * channel, NOT including the source user e.g. for use in QUIT
1434  */
1435
1436 void User::WriteCommonExcept(const char* text, ...)
1437 {
1438         char textbuffer[MAXBUF];
1439         va_list argsPtr;
1440
1441         va_start(argsPtr, text);
1442         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1443         va_end(argsPtr);
1444
1445         this->WriteCommonExcept(std::string(textbuffer));
1446 }
1447
1448 void User::WriteCommonQuit(const std::string &normal_text, const std::string &oper_text)
1449 {
1450         char tb1[MAXBUF];
1451         char tb2[MAXBUF];
1452
1453         if (this->registered != REG_ALL)
1454                 return;
1455
1456         uniq_id++;
1457
1458         if (!already_sent)
1459                 InitializeAlreadySent(ServerInstance->SE);
1460
1461         snprintf(tb1,MAXBUF,":%s QUIT :%s",this->GetFullHost().c_str(),normal_text.c_str());
1462         snprintf(tb2,MAXBUF,":%s QUIT :%s",this->GetFullHost().c_str(),oper_text.c_str());
1463         std::string out1 = tb1;
1464         std::string out2 = tb2;
1465
1466         for (UCListIter v = this->chans.begin(); v != this->chans.end(); v++)
1467         {
1468                 CUList *ulist = v->first->GetUsers();
1469                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1470                 {
1471                         if (this != i->first)
1472                         {
1473                                 if ((IS_LOCAL(i->first)) && (already_sent[i->first->fd] != uniq_id))
1474                                 {
1475                                         already_sent[i->first->fd] = uniq_id;
1476                                         i->first->Write(IS_OPER(i->first) ? out2 : out1);
1477                                 }
1478                         }
1479                 }
1480         }
1481 }
1482
1483 void User::WriteCommonExcept(const std::string &text)
1484 {
1485         char tb1[MAXBUF];
1486         std::string out1;
1487
1488         if (this->registered != REG_ALL)
1489                 return;
1490
1491         uniq_id++;
1492
1493         if (!already_sent)
1494                 InitializeAlreadySent(ServerInstance->SE);
1495
1496         snprintf(tb1,MAXBUF,":%s %s",this->GetFullHost().c_str(),text.c_str());
1497         out1 = tb1;
1498
1499         for (UCListIter v = this->chans.begin(); v != this->chans.end(); v++)
1500         {
1501                 CUList *ulist = v->first->GetUsers();
1502                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1503                 {
1504                         if (this != i->first)
1505                         {
1506                                 if ((IS_LOCAL(i->first)) && (already_sent[i->first->fd] != uniq_id))
1507                                 {
1508                                         already_sent[i->first->fd] = uniq_id;
1509                                         i->first->Write(out1);
1510                                 }
1511                         }
1512                 }
1513         }
1514
1515 }
1516
1517 void User::WriteWallOps(const std::string &text)
1518 {
1519         if (!IS_LOCAL(this))
1520                 return;
1521
1522         std::string wallop("WALLOPS :");
1523         wallop.append(text);
1524
1525         for (std::vector<User*>::const_iterator i = ServerInstance->Users->local_users.begin(); i != ServerInstance->Users->local_users.end(); i++)
1526         {
1527                 User* t = *i;
1528                 if (t->IsModeSet('w'))
1529                         this->WriteTo(t,wallop);
1530         }
1531 }
1532
1533 void User::WriteWallOps(const char* text, ...)
1534 {
1535         if (!IS_LOCAL(this))
1536                 return;
1537
1538         char textbuffer[MAXBUF];
1539         va_list argsPtr;
1540
1541         va_start(argsPtr, text);
1542         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1543         va_end(argsPtr);
1544
1545         this->WriteWallOps(std::string(textbuffer));
1546 }
1547
1548 /* return 0 or 1 depending if users u and u2 share one or more common channels
1549  * (used by QUIT, NICK etc which arent channel specific notices)
1550  *
1551  * The old algorithm in 1.0 for this was relatively inefficient, iterating over
1552  * the first users channels then the second users channels within the outer loop,
1553  * therefore it was a maximum of x*y iterations (upon returning 0 and checking
1554  * all possible iterations). However this new function instead checks against the
1555  * channel's userlist in the inner loop which is a std::map<User*,User*>
1556  * and saves us time as we already know what pointer value we are after.
1557  * Don't quote me on the maths as i am not a mathematician or computer scientist,
1558  * but i believe this algorithm is now x+(log y) maximum iterations instead.
1559  */
1560 bool User::SharesChannelWith(User *other)
1561 {
1562         if ((!other) || (this->registered != REG_ALL) || (other->registered != REG_ALL))
1563                 return false;
1564
1565         /* Outer loop */
1566         for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1567         {
1568                 /* Eliminate the inner loop (which used to be ~equal in size to the outer loop)
1569                  * by replacing it with a map::find which *should* be more efficient
1570                  */
1571                 if (i->first->HasUser(other))
1572                         return true;
1573         }
1574         return false;
1575 }
1576
1577 bool User::ChangeName(const char* gecos)
1578 {
1579         if (!this->fullname.compare(gecos))
1580                 return true;
1581
1582         if (IS_LOCAL(this))
1583         {
1584                 int MOD_RESULT = 0;
1585                 FOREACH_RESULT(I_OnChangeLocalUserGECOS,OnChangeLocalUserGECOS(this,gecos));
1586                 if (MOD_RESULT)
1587                         return false;
1588                 FOREACH_MOD(I_OnChangeName,OnChangeName(this,gecos));
1589         }
1590         this->fullname.assign(gecos, 0, ServerInstance->Config->Limits.MaxGecos);
1591
1592         return true;
1593 }
1594
1595 bool User::ChangeDisplayedHost(const char* shost)
1596 {
1597         if (dhost == shost)
1598                 return true;
1599
1600         if (IS_LOCAL(this))
1601         {
1602                 int MOD_RESULT = 0;
1603                 FOREACH_RESULT(I_OnChangeLocalUserHost,OnChangeLocalUserHost(this,shost));
1604                 if (MOD_RESULT)
1605                         return false;
1606                 FOREACH_MOD(I_OnChangeHost,OnChangeHost(this,shost));
1607         }
1608
1609         int MOD_RESULT = 0;
1610         FOREACH_RESULT(I_OnHostCycle, OnHostCycle(this));
1611
1612         if (this->ServerInstance->Config->CycleHosts && !MOD_RESULT)
1613                 this->WriteCommonExcept("QUIT :Changing hosts");
1614
1615         /* Fix by Om: User::dhost is 65 long, this was truncating some long hosts */
1616         this->dhost.assign(shost, 0, 64);
1617
1618         this->InvalidateCache();
1619
1620         if (this->ServerInstance->Config->CycleHosts && !MOD_RESULT)
1621         {
1622                 for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1623                 {
1624                         i->first->WriteAllExceptSender(this, false, 0, "JOIN %s", i->first->name.c_str());
1625                         std::string n = this->ServerInstance->Modes->ModeString(this, i->first);
1626                         if (n.length() > 0)
1627                                 i->first->WriteAllExceptSender(this, true, 0, "MODE %s +%s", i->first->name.c_str(), n.c_str());
1628                 }
1629         }
1630
1631         if (IS_LOCAL(this))
1632                 this->WriteNumeric(RPL_YOURDISPLAYEDHOST, "%s %s :is now your displayed host",this->nick.c_str(),this->dhost.c_str());
1633
1634         return true;
1635 }
1636
1637 bool User::ChangeIdent(const char* newident)
1638 {
1639         if (this->ident == newident)
1640                 return true;
1641
1642         int MOD_RESULT = 0;
1643         FOREACH_RESULT(I_OnHostCycle, OnHostCycle(this));
1644
1645         if (this->ServerInstance->Config->CycleHosts && !MOD_RESULT)
1646                 this->WriteCommonExcept("%s","QUIT :Changing ident");
1647
1648         this->ident.assign(newident, 0, ServerInstance->Config->Limits.IdentMax + 1);
1649
1650         this->InvalidateCache();
1651
1652         if (this->ServerInstance->Config->CycleHosts && !MOD_RESULT)
1653         {
1654                 for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1655                 {
1656                         i->first->WriteAllExceptSender(this, false, 0, "JOIN %s", i->first->name.c_str());
1657                         std::string n = this->ServerInstance->Modes->ModeString(this, i->first);
1658                         if (n.length() > 0)
1659                                 i->first->WriteAllExceptSender(this, true, 0, "MODE %s +%s", i->first->name.c_str(), n.c_str());
1660                 }
1661         }
1662
1663         return true;
1664 }
1665
1666 void User::SendAll(const char* command, const char* text, ...)
1667 {
1668         char textbuffer[MAXBUF];
1669         char formatbuffer[MAXBUF];
1670         va_list argsPtr;
1671
1672         va_start(argsPtr, text);
1673         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1674         va_end(argsPtr);
1675
1676         snprintf(formatbuffer,MAXBUF,":%s %s $* :%s", this->GetFullHost().c_str(), command, textbuffer);
1677         std::string fmt = formatbuffer;
1678
1679         for (std::vector<User*>::const_iterator i = ServerInstance->Users->local_users.begin(); i != ServerInstance->Users->local_users.end(); i++)
1680         {
1681                 (*i)->Write(fmt);
1682         }
1683 }
1684
1685
1686 std::string User::ChannelList(User* source)
1687 {
1688         std::string list;
1689
1690         for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1691         {
1692                 /* If the target is the same as the sender, let them see all their channels.
1693                  * If the channel is NOT private/secret OR the user shares a common channel
1694                  * If the user is an oper, and the <options:operspywhois> option is set.
1695                  */
1696                 if ((source == this) || (IS_OPER(source) && ServerInstance->Config->OperSpyWhois) || (((!i->first->IsModeSet('p')) && (!i->first->IsModeSet('s'))) || (i->first->HasUser(source))))
1697                 {
1698                         list.append(i->first->GetPrefixChar(this)).append(i->first->name).append(" ");
1699                 }
1700         }
1701
1702         return list;
1703 }
1704
1705 void User::SplitChanList(User* dest, const std::string &cl)
1706 {
1707         std::string line;
1708         std::ostringstream prefix;
1709         std::string::size_type start, pos, length;
1710
1711         prefix << this->nick << " " << dest->nick << " :";
1712         line = prefix.str();
1713         int namelen = strlen(ServerInstance->Config->ServerName) + 6;
1714
1715         for (start = 0; (pos = cl.find(' ', start)) != std::string::npos; start = pos+1)
1716         {
1717                 length = (pos == std::string::npos) ? cl.length() : pos;
1718
1719                 if (line.length() + namelen + length - start > 510)
1720                 {
1721                         ServerInstance->SendWhoisLine(this, dest, 319, "%s", line.c_str());
1722                         line = prefix.str();
1723                 }
1724
1725                 if(pos == std::string::npos)
1726                 {
1727                         line.append(cl.substr(start, length - start));
1728                         break;
1729                 }
1730                 else
1731                 {
1732                         line.append(cl.substr(start, length - start + 1));
1733                 }
1734         }
1735
1736         if (line.length())
1737         {
1738                 ServerInstance->SendWhoisLine(this, dest, 319, "%s", line.c_str());
1739         }
1740 }
1741
1742 /*
1743  * Sets a user's connection class.
1744  * If the class name is provided, it will be used. Otherwise, the class will be guessed using host/ip/ident/etc.
1745  * NOTE: If the <ALLOW> or <DENY> tag specifies an ip, and this user resolves,
1746  * then their ip will be taken as 'priority' anyway, so for example,
1747  * <connect allow="127.0.0.1"> will match joe!bloggs@localhost
1748  */
1749 ConnectClass* User::SetClass(const std::string &explicit_name)
1750 {
1751         ConnectClass *found = NULL;
1752
1753         if (!IS_LOCAL(this))
1754                 return NULL;
1755
1756         ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Setting connect class for UID %s", this->uuid.c_str());
1757
1758         if (!explicit_name.empty())
1759         {
1760                 for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++)
1761                 {
1762                         ConnectClass* c = *i;
1763
1764                         if (c->GetDisabled())
1765                                 continue; // can't possibly match, removed from conf
1766
1767                         if (explicit_name == c->GetName())
1768                         {
1769                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Explicitly set to %s", explicit_name.c_str());
1770                                 found = c;
1771                         }
1772                 }
1773         }
1774         else
1775         {
1776                 for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++)
1777                 {
1778                         ConnectClass* c = *i;
1779
1780                         if (c->GetType() == CC_ALLOW)
1781                         {
1782                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "ALLOW %s %d %s", c->GetHost().c_str(), c->GetPort(), c->GetName().c_str());
1783                         }
1784                         else
1785                         {
1786                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "DENY %s %d %s", c->GetHost().c_str(), c->GetPort(), c->GetName().c_str());
1787                         }
1788
1789                         /* if it's disabled, we can't match this one. */
1790                         if (c->GetDisabled())
1791                         {
1792                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Class disabled");
1793                                 continue;
1794                         }
1795
1796                         /* check if host matches.. */
1797                         if (!InspIRCd::MatchCIDR(this->GetIPString(), c->GetHost(), NULL) &&
1798                             !InspIRCd::MatchCIDR(this->host, c->GetHost(), NULL))
1799                         {
1800                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "No host match (for %s)", c->GetHost().c_str());
1801                                 continue;
1802                         }
1803
1804                         /*
1805                          * deny change if change will take class over the limit check it HERE, not after we found a matching class,
1806                          * because we should attempt to find another class if this one doesn't match us. -- w00t
1807                          */
1808                         if (c->limit && (c->RefCount + 1 >= c->limit))
1809                         {
1810                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "OOPS: Connect class limit (%lu) hit, denying", c->limit);
1811                                 continue;
1812                         }
1813
1814                         /* if it requires a port ... */
1815                         if (c->GetPort())
1816                         {
1817                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Requires port (%d)", c->GetPort());
1818
1819                                 /* and our port doesn't match, fail. */
1820                                 if (this->GetPort() != c->GetPort())
1821                                 {
1822                                         ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Port match failed (%d)", this->GetPort());
1823                                         continue;
1824                                 }
1825                         }
1826
1827                         /* we stop at the first class that meets ALL critera. */
1828                         found = c;
1829                         break;
1830                 }
1831         }
1832
1833         /*
1834          * Okay, assuming we found a class that matches.. switch us into that class, keeping refcounts up to date.
1835          */
1836         if (found)
1837         {
1838                 /* only fiddle with refcounts if they are already in a class .. */
1839                 if (this->MyClass)
1840                 {
1841                         if (found == this->MyClass) // no point changing this shit :P
1842                                 return this->MyClass;
1843                         this->MyClass->RefCount--;
1844                         ServerInstance->Logs->Log("USERS", DEBUG, "Untying user from connect class -- refcount: %lu", this->MyClass->RefCount);
1845                 }
1846
1847                 this->MyClass = found;
1848                 this->MyClass->RefCount++;
1849                 ServerInstance->Logs->Log("USERS", DEBUG, "User tied to new class -- connect refcount now: %lu", this->MyClass->RefCount);
1850         }
1851
1852         return this->MyClass;
1853 }
1854
1855 /* looks up a users password for their connection class (<ALLOW>/<DENY> tags)
1856  * NOTE: If the <ALLOW> or <DENY> tag specifies an ip, and this user resolves,
1857  * then their ip will be taken as 'priority' anyway, so for example,
1858  * <connect allow="127.0.0.1"> will match joe!bloggs@localhost
1859  */
1860 ConnectClass* User::GetClass()
1861 {
1862         return this->MyClass;
1863 }
1864
1865 void User::PurgeEmptyChannels()
1866 {
1867         std::vector<Channel*> to_delete;
1868
1869         // firstly decrement the count on each channel
1870         for (UCListIter f = this->chans.begin(); f != this->chans.end(); f++)
1871         {
1872                 f->first->RemoveAllPrefixes(this);
1873                 if (f->first->DelUser(this) == 0)
1874                 {
1875                         /* No users left in here, mark it for deletion */
1876                         try
1877                         {
1878                                 to_delete.push_back(f->first);
1879                         }
1880                         catch (...)
1881                         {
1882                                 ServerInstance->Logs->Log("USERS", DEBUG,"Exception in User::PurgeEmptyChannels to_delete.push_back()");
1883                         }
1884                 }
1885         }
1886
1887         for (std::vector<Channel*>::iterator n = to_delete.begin(); n != to_delete.end(); n++)
1888         {
1889                 Channel* thischan = *n;
1890                 chan_hash::iterator i2 = ServerInstance->chanlist->find(thischan->name);
1891                 if (i2 != ServerInstance->chanlist->end())
1892                 {
1893                         FOREACH_MOD(I_OnChannelDelete,OnChannelDelete(i2->second));
1894                         delete i2->second;
1895                         ServerInstance->chanlist->erase(i2);
1896                         this->chans.erase(*n);
1897                 }
1898         }
1899
1900         this->UnOper();
1901 }
1902
1903 void User::ShowMOTD()
1904 {
1905         if (!ServerInstance->Config->MOTD.size())
1906         {
1907                 this->WriteNumeric(ERR_NOMOTD, "%s :Message of the day file is missing.",this->nick.c_str());
1908                 return;
1909         }
1910         this->WriteNumeric(RPL_MOTDSTART, "%s :%s message of the day", this->nick.c_str(), ServerInstance->Config->ServerName);
1911
1912         for (file_cache::iterator i = ServerInstance->Config->MOTD.begin(); i != ServerInstance->Config->MOTD.end(); i++)
1913                 this->WriteNumeric(RPL_MOTD, "%s :- %s",this->nick.c_str(),i->c_str());
1914
1915         this->WriteNumeric(RPL_ENDOFMOTD, "%s :End of message of the day.", this->nick.c_str());
1916 }
1917
1918 void User::ShowRULES()
1919 {
1920         if (!ServerInstance->Config->RULES.size())
1921         {
1922                 this->WriteNumeric(ERR_NORULES, "%s :RULES File is missing",this->nick.c_str());
1923                 return;
1924         }
1925
1926         this->WriteNumeric(RPL_RULESTART, "%s :- %s Server Rules -",this->nick.c_str(),ServerInstance->Config->ServerName);
1927
1928         for (file_cache::iterator i = ServerInstance->Config->RULES.begin(); i != ServerInstance->Config->RULES.end(); i++)
1929                 this->WriteNumeric(RPL_RULES, "%s :- %s",this->nick.c_str(),i->c_str());
1930
1931         this->WriteNumeric(RPL_RULESEND, "%s :End of RULES command.",this->nick.c_str());
1932 }
1933
1934 void User::HandleEvent(EventType et, int errornum)
1935 {
1936         if (this->quitting) // drop everything, user is due to be quit
1937                 return;
1938
1939         switch (et)
1940         {
1941                 case EVENT_READ:
1942                         ServerInstance->ProcessUser(this);
1943                 break;
1944                 case EVENT_WRITE:
1945                         this->FlushWriteBuf();
1946                 break;
1947                 case EVENT_ERROR:
1948                         ServerInstance->Users->QuitUser(this, errornum ? strerror(errornum) : "Client closed the connection");
1949                 break;
1950         }
1951 }
1952
1953 void User::SetOperQuit(const std::string &oquit)
1954 {
1955         operquitmsg = oquit;
1956 }
1957
1958 const std::string& User::GetOperQuit()
1959 {
1960         return operquitmsg;
1961 }
1962
1963 void User::IncreasePenalty(int increase)
1964 {
1965         this->Penalty += increase;
1966 }
1967
1968 void User::DecreasePenalty(int decrease)
1969 {
1970         this->Penalty -= decrease;
1971 }
1972
1973 VisData::VisData()
1974 {
1975 }
1976
1977 VisData::~VisData()
1978 {
1979 }
1980
1981 bool VisData::VisibleTo(User* user)
1982 {
1983         return true;
1984 }
1985