src/users.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2009 InspIRCd Development Team
   6  * See: http://wiki.inspircd.org/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         std::string s = this->FormatNoticeMasks();
  94         if (s.length() == 0)
  95         {
  96                 this->modes[UM_SNOMASK] = false;
  97         }
  98
  99         return output;
 100 }
 101
 102 void User::StartDNSLookup()
 103 {
 104         try
 105         {
 106                 bool cached = false;
 107                 const char* sip = this->GetIPString();
 108                 UserResolver *res_reverse;
 109
 110                 QueryType resolvtype = this->client_sa.sa.sa_family == AF_INET6 ? DNS_QUERY_PTR6 : DNS_QUERY_PTR4;
 111                 res_reverse = new UserResolver(this->ServerInstance, this, sip, resolvtype, cached);
 112
 113                 this->ServerInstance->AddResolver(res_reverse, cached);
 114         }
 115         catch (CoreException& e)
 116         {
 117                 ServerInstance->Logs->Log("USERS", DEBUG,"Error in resolver: %s",e.GetReason());
 118         }
 119 }
 120
 121 bool User::IsNoticeMaskSet(unsigned char sm)
 122 {
 123         if (!isalpha(sm))
 124                 return false;
 125         return (snomasks[sm-65]);
 126 }
 127
 128 void User::SetNoticeMask(unsigned char sm, bool value)
 129 {
 130         if (!isalpha(sm))
 131                 return;
 132         snomasks[sm-65] = value;
 133 }
 134
 135 const char* User::FormatNoticeMasks()
 136 {
 137         static char data[MAXBUF];
 138         int offset = 0;
 139
 140         for (int n = 0; n < 64; n++)
 141         {
 142                 if (snomasks[n])
 143                         data[offset++] = n+65;
 144         }
 145
 146         data[offset] = 0;
 147         return data;
 148 }
 149
 150 bool User::IsModeSet(unsigned char m)
 151 {
 152         if (!isalpha(m))
 153                 return false;
 154         return (modes[m-65]);
 155 }
 156
 157 void User::SetMode(unsigned char m, bool value)
 158 {
 159         if (!isalpha(m))
 160                 return;
 161         modes[m-65] = value;
 162 }
 163
 164 const char* User::FormatModes(bool showparameters)
 165 {
 166         static char data[MAXBUF];
 167         std::string params;
 168         int offset = 0;
 169
 170         for (unsigned char n = 0; n < 64; n++)
 171         {
 172                 if (modes[n])
 173                 {
 174                         data[offset++] = n + 65;
 175                         ModeHandler* mh = ServerInstance->Modes->FindMode(n + 65, MODETYPE_USER);
 176                         if (showparameters && mh && mh->GetNumParams(true))
 177                         {
 178                                 std::string p = mh->GetUserParameter(this);
 179                                 if (p.length())
 180                                         params.append(" ").append(p);
 181                         }
 182                 }
 183         }
 184         data[offset] = 0;
 185         strlcat(data, params.c_str(), MAXBUF);
 186         return data;
 187 }
 188
 189 void User::DecrementModes()
 190 {
 191         ServerInstance->Logs->Log("USERS", DEBUG, "DecrementModes()");
 192         for (unsigned char n = 'A'; n <= 'z'; n++)
 193         {
 194                 if (modes[n-65])
 195                 {
 196                         ServerInstance->Logs->Log("USERS", DEBUG,"DecrementModes() found mode %c", n);
 197                         ModeHandler* mh = ServerInstance->Modes->FindMode(n, MODETYPE_USER);
 198                         if (mh)
 199                         {
 200                                 ServerInstance->Logs->Log("USERS", DEBUG,"Found handler %c and call ChangeCount", n);
 201                                 mh->ChangeCount(-1);
 202                         }
 203                 }
 204         }
 205 }
 206
 207 User::User(InspIRCd* Instance, const std::string &uid) : ServerInstance(Instance)
 208 {
 209         server = Instance->FindServerNamePtr(Instance->Config->ServerName);
 210         age = ServerInstance->Time();
 211         Penalty = 0;
 212         lastping = signon = idle_lastmsg = nping = registered = 0;
 213         bytes_in = bytes_out = cmds_in = cmds_out = 0;
 214         quietquit = quitting = exempt = haspassed = dns_done = false;
 215         fd = -1;
 216         server_sa.sa.sa_family = AF_UNSPEC;
 217         client_sa.sa.sa_family = AF_UNSPEC;
 218         recvq.clear();
 219         sendq.clear();
 220         Visibility = NULL;
 221         MyClass = NULL;
 222         AllowedPrivs = AllowedOperCommands = NULL;
 223         chans.clear();
 224         invites.clear();
 225
 226         if (uid.empty())
 227                 uuid.assign(Instance->GetUID(), 0, UUID_LENGTH - 1);
 228         else
 229                 uuid.assign(uid, 0, UUID_LENGTH - 1);
 230
 231         ServerInstance->Logs->Log("USERS", DEBUG,"New UUID for user: %s (%s)", uuid.c_str(), uid.empty() ? "allocated new" : "used remote");
 232
 233         user_hash::iterator finduuid = Instance->Users->uuidlist->find(uuid);
 234         if (finduuid == Instance->Users->uuidlist->end())
 235                 (*Instance->Users->uuidlist)[uuid] = this;
 236         else
 237                 throw CoreException("Duplicate UUID "+std::string(uuid)+" in User constructor");
 238 }
 239
 240 User::~User()
 241 {
 242         /* NULL for remote users :) */
 243         if (this->MyClass)
 244         {
 245                 this->MyClass->RefCount--;
 246                 ServerInstance->Logs->Log("USERS", DEBUG, "User destructor -- connect refcount now: %lu", this->MyClass->RefCount);
 247                 if (MyClass->RefCount == 0)
 248                         delete MyClass;
 249         }
 250
 251         if (this->AllowedOperCommands)
 252         {
 253                 delete AllowedOperCommands;
 254                 AllowedOperCommands = NULL;
 255         }
 256
 257         if (this->AllowedPrivs)
 258         {
 259                 delete AllowedPrivs;
 260                 AllowedPrivs = NULL;
 261         }
 262
 263         this->InvalidateCache();
 264         this->DecrementModes();
 265
 266         if (client_sa.sa.sa_family != AF_UNSPEC)
 267                 ServerInstance->Users->RemoveCloneCounts(this);
 268
 269         ServerInstance->Users->uuidlist->erase(uuid);
 270 }
 271
 272 const std::string& User::MakeHost()
 273 {
 274         if (!this->cached_makehost.empty())
 275                 return this->cached_makehost;
 276
 277         char nhost[MAXBUF];
 278         /* This is much faster than snprintf */
 279         char* t = nhost;
 280         for(const char* n = ident.c_str(); *n; n++)
 281                 *t++ = *n;
 282         *t++ = '@';
 283         for(const char* n = host.c_str(); *n; n++)
 284                 *t++ = *n;
 285         *t = 0;
 286
 287         this->cached_makehost.assign(nhost);
 288
 289         return this->cached_makehost;
 290 }
 291
 292 const std::string& User::MakeHostIP()
 293 {
 294         if (!this->cached_hostip.empty())
 295                 return this->cached_hostip;
 296
 297         char ihost[MAXBUF];
 298         /* This is much faster than snprintf */
 299         char* t = ihost;
 300         for(const char* n = ident.c_str(); *n; n++)
 301                 *t++ = *n;
 302         *t++ = '@';
 303         for(const char* n = this->GetIPString(); *n; n++)
 304                 *t++ = *n;
 305         *t = 0;
 306
 307         this->cached_hostip = ihost;
 308
 309         return this->cached_hostip;
 310 }
 311
 312 void User::CloseSocket()
 313 {
 314         if (this->fd > -1)
 315         {
 316                 ServerInstance->SE->Shutdown(this, 2);
 317                 ServerInstance->SE->Close(this);
 318         }
 319 }
 320
 321 const std::string User::GetFullHost()
 322 {
 323         if (!this->cached_fullhost.empty())
 324                 return this->cached_fullhost;
 325
 326         char result[MAXBUF];
 327         char* t = result;
 328         for(const char* n = nick.c_str(); *n; n++)
 329                 *t++ = *n;
 330         *t++ = '!';
 331         for(const char* n = ident.c_str(); *n; n++)
 332                 *t++ = *n;
 333         *t++ = '@';
 334         for(const char* n = dhost.c_str(); *n; n++)
 335                 *t++ = *n;
 336         *t = 0;
 337
 338         this->cached_fullhost = result;
 339
 340         return this->cached_fullhost;
 341 }
 342
 343 char* User::MakeWildHost()
 344 {
 345         static char nresult[MAXBUF];
 346         char* t = nresult;
 347         *t++ = '*';     *t++ = '!';
 348         *t++ = '*';     *t++ = '@';
 349         for(const char* n = dhost.c_str(); *n; n++)
 350                 *t++ = *n;
 351         *t = 0;
 352         return nresult;
 353 }
 354
 355 int User::ReadData(void* buffer, size_t size)
 356 {
 357         if (IS_LOCAL(this))
 358         {
 359 #ifndef WIN32
 360                 return read(this->fd, buffer, size);
 361 #else
 362                 return recv(this->fd, (char*)buffer, size, 0);
 363 #endif
 364         }
 365         else
 366                 return 0;
 367 }
 368
 369
 370 const std::string User::GetFullRealHost()
 371 {
 372         if (!this->cached_fullrealhost.empty())
 373                 return this->cached_fullrealhost;
 374
 375         char fresult[MAXBUF];
 376         char* t = fresult;
 377         for(const char* n = nick.c_str(); *n; n++)
 378                 *t++ = *n;
 379         *t++ = '!';
 380         for(const char* n = ident.c_str(); *n; n++)
 381                 *t++ = *n;
 382         *t++ = '@';
 383         for(const char* n = host.c_str(); *n; n++)
 384                 *t++ = *n;
 385         *t = 0;
 386
 387         this->cached_fullrealhost = fresult;
 388
 389         return this->cached_fullrealhost;
 390 }
 391
 392 bool User::IsInvited(const irc::string &channel)
 393 {
 394         time_t now = ServerInstance->Time();
 395         InvitedList::iterator safei;
 396         for (InvitedList::iterator i = invites.begin(); i != invites.end(); ++i)
 397         {
 398                 if (channel == i->first)
 399                 {
 400                         if (i->second != 0 && now > i->second)
 401                         {
 402                                 /* Expired invite, remove it. */
 403                                 safei = i;
 404                                 --i;
 405                                 invites.erase(safei);
 406                                 continue;
 407                         }
 408                         return true;
 409                 }
 410         }
 411         return false;
 412 }
 413
 414 InvitedList* User::GetInviteList()
 415 {
 416         time_t now = ServerInstance->Time();
 417         /* Weed out expired invites here. */
 418         InvitedList::iterator safei;
 419         for (InvitedList::iterator i = invites.begin(); i != invites.end(); ++i)
 420         {
 421                 if (i->second != 0 && now > i->second)
 422                 {
 423                         /* Expired invite, remove it. */
 424                         safei = i;
 425                         --i;
 426                         invites.erase(safei);
 427                 }
 428         }
 429         return &invites;
 430 }
 431
 432 void User::InviteTo(const irc::string &channel, time_t invtimeout)
 433 {
 434         time_t now = ServerInstance->Time();
 435         if (invtimeout != 0 && now > invtimeout) return; /* Don't add invites that are expired from the get-go. */
 436         for (InvitedList::iterator i = invites.begin(); i != invites.end(); ++i)
 437         {
 438                 if (channel == i->first)
 439                 {
 440                         if (i->second != 0 && invtimeout > i->second)
 441                         {
 442                                 i->second = invtimeout;
 443                         }
 444
 445                         return;
 446                 }
 447         }
 448         invites.push_back(std::make_pair(channel, invtimeout));
 449 }
 450
 451 void User::RemoveInvite(const irc::string &channel)
 452 {
 453         for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
 454         {
 455                 if (channel == i->first)
 456                 {
 457                         invites.erase(i);
 458                         return;
 459                 }
 460         }
 461 }
 462
 463 bool User::HasModePermission(unsigned char mode, ModeType type)
 464 {
 465         if (!IS_LOCAL(this))
 466                 return true;
 467
 468         if (!IS_OPER(this))
 469                 return false;
 470
 471         if (mode < 'A' || mode > ('A' + 64)) return false;
 472
 473         return ((type == MODETYPE_USER ? AllowedUserModes : AllowedChanModes))[(mode - 'A')];
 474
 475 }
 476
 477 bool User::HasPermission(const std::string &command)
 478 {
 479         /*
 480          * users on remote servers can completely bypass all permissions based checks.
 481          * This prevents desyncs when one server has different type/class tags to another.
 482          * That having been said, this does open things up to the possibility of source changes
 483          * allowing remote kills, etc - but if they have access to the src, they most likely have
 484          * access to the conf - so it's an end to a means either way.
 485          */
 486         if (!IS_LOCAL(this))
 487                 return true;
 488
 489         // are they even an oper at all?
 490         if (!IS_OPER(this))
 491         {
 492                 return false;
 493         }
 494
 495         if (!AllowedOperCommands)
 496                 return false;
 497
 498         if (AllowedOperCommands->find(command) != AllowedOperCommands->end())
 499                 return true;
 500         else if (AllowedOperCommands->find("*") != AllowedOperCommands->end())
 501                 return true;
 502
 503         return false;
 504 }
 505
 506
 507 bool User::HasPrivPermission(const std::string &privstr, bool noisy)
 508 {
 509         if (!IS_LOCAL(this))
 510         {
 511                 ServerInstance->Logs->Log("PRIVS", DEBUG, "Remote (yes)");
 512                 return true;
 513         }
 514
 515         if (!IS_OPER(this))
 516         {
 517                 if (noisy)
 518                         this->WriteServ("NOTICE %s :You are not an oper", this->nick.c_str());
 519                 return false;
 520         }
 521
 522         if (!AllowedPrivs)
 523         {
 524                 if (noisy)
 525                         this->WriteServ("NOTICE %s :Privset empty(!?)", this->nick.c_str());
 526                 return false;
 527         }
 528
 529         if (AllowedPrivs->find(privstr) != AllowedPrivs->end())
 530         {
 531                 return true;
 532         }
 533         else if (AllowedPrivs->find("*") != AllowedPrivs->end())
 534         {
 535                 return true;
 536         }
 537
 538         if (noisy)
 539                 this->WriteServ("NOTICE %s :Oper type %s does not have access to priv %s", this->nick.c_str(), this->oper.c_str(), privstr.c_str());
 540         return false;
 541 }
 542
 543 bool User::AddBuffer(const std::string &a)
 544 {
 545         std::string::size_type start = 0;
 546         std::string::size_type i = a.find('\r');
 547
 548         /*
 549          * The old implementation here took a copy, and rfind() on \r, removing as it found them, before
 550          * copying a second time onto the recvq. That's ok, but involves three copies minimum (recv() to buffer,
 551          * buffer to here, here to recvq) - The new method now copies twice (recv() to buffer, buffer to recvq).
 552          *
 553          * We use find() instead of rfind() for clarity, however unlike the old code, our scanning of the string is
 554          * contiguous: as we specify a startpoint, we never see characters we have scanned previously, making this
 555          * marginally faster in cases with a number of \r hidden early on in the buffer.
 556          *
 557          * How it works:
 558          * Start at first pos of string, find first \r, append everything in the chunk (excluding \r) to recvq. Set
 559          * i ahead of the \r, search for next \r, add next chunk to buffer... repeat.
 560          *              -- w00t (7 may, 2008)
 561          */
 562         if (i == std::string::npos)
 563         {
 564                 // no \r that we need to dance around, just add to buffer
 565                 recvq.append(a);
 566         }
 567         else
 568         {
 569                 // While we can find the end of a chunk to add
 570                 while (i != std::string::npos)
 571                 {
 572                         // Append the chunk that we have
 573                         recvq.append(a, start, (i - start));
 574
 575                         // Start looking for the next one
 576                         start = i + 1;
 577                         i = a.find('\r', start);
 578                 }
 579
 580                 if (start != a.length())
 581                 {
 582                         /*
 583                          * This is here to catch a corner case when we get something like:
 584                          * NICK w0
 585                          * 0t\r\nU
 586                          * SER ...
 587                          * in successive calls to us.
 588                          *
 589                          * Without this conditional, the 'U' on the second case will be dropped,
 590                          * which is most *certainly* not the behaviour we want!
 591                          *              -- w00t
 592                          */
 593                         recvq.append(a, start, (a.length() - start));
 594                 }
 595         }
 596
 597         if (this->MyClass && !this->HasPrivPermission("users/flood/increased-buffers") && recvq.length() > this->MyClass->GetRecvqMax())
 598         {
 599                 ServerInstance->Users->QuitUser(this, "RecvQ exceeded");
 600                 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());
 601                 return false;
 602         }
 603
 604         return true;
 605 }
 606
 607 bool User::BufferIsReady()
 608 {
 609         return (recvq.find('\n') != std::string::npos);
 610 }
 611
 612 void User::ClearBuffer()
 613 {
 614         recvq.clear();
 615 }
 616
 617 std::string User::GetBuffer()
 618 {
 619         try
 620         {
 621                 if (recvq.empty())
 622                         return "";
 623
 624                 /* Strip any leading \r or \n off the string.
 625                  * Usually there are only one or two of these,
 626                  * so its is computationally cheap to do.
 627                  */
 628                 std::string::iterator t = recvq.begin();
 629                 while (t != recvq.end() && (*t == '\r' || *t == '\n'))
 630                 {
 631                         recvq.erase(t);
 632                         t = recvq.begin();
 633                 }
 634
 635                 for (std::string::iterator x = recvq.begin(); x != recvq.end(); x++)
 636                 {
 637                         /* Find the first complete line, return it as the
 638                          * result, and leave the recvq as whats left
 639                          */
 640                         if (*x == '\n')
 641                         {
 642                                 std::string ret = std::string(recvq.begin(), x);
 643                                 recvq.erase(recvq.begin(), x + 1);
 644                                 return ret;
 645                         }
 646                 }
 647                 return "";
 648         }
 649
 650         catch (...)
 651         {
 652                 ServerInstance->Logs->Log("USERS", DEBUG,"Exception in User::GetBuffer()");
 653                 return "";
 654         }
 655 }
 656
 657 void User::AddWriteBuf(const std::string &data)
 658 {
 659         if (!this->quitting && this->MyClass && !this->HasPrivPermission("users/flood/increased-buffers") && sendq.length() + data.length() > this->MyClass->GetSendqMax())
 660         {
 661                 /*
 662                  * Fix by brain - Set the error text BEFORE calling, because
 663                  * if we dont it'll recursively  call here over and over again trying
 664                  * to repeatedly add the text to the sendq!
 665                  */
 666                 ServerInstance->Users->QuitUser(this, "SendQ exceeded");
 667                 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());
 668                 return;
 669         }
 670
 671         // We still want to append data to the sendq of a quitting user,
 672         // e.g. their ERROR message that says 'closing link'
 673
 674         if (data.length() > MAXBUF - 2) /* MAXBUF has a value of 514, to account for line terminators */
 675                 sendq.append(data.substr(0,MAXBUF - 4)).append("\r\n"); /* MAXBUF-4 = 510 */
 676         else
 677                 sendq.append(data);
 678 }
 679
 680 // send AS MUCH OF THE USERS SENDQ as we are able to (might not be all of it)
 681 void User::FlushWriteBuf()
 682 {
 683         if (this->fd == FD_MAGIC_NUMBER)
 684         {
 685                 sendq.clear();
 686                 return;
 687         }
 688
 689         if ((sendq.length()) && (this->fd != FD_MAGIC_NUMBER))
 690         {
 691                 int old_sendq_length = sendq.length();
 692                 int n_sent = ServerInstance->SE->Send(this, this->sendq.data(), this->sendq.length(), 0);
 693
 694                 if (n_sent == -1)
 695                 {
 696                         if (errno == EAGAIN)
 697                         {
 698                                 /* The socket buffer is full. This isnt fatal,
 699                                  * try again later.
 700                                  */
 701                                 ServerInstance->SE->WantWrite(this);
 702                         }
 703                         else
 704                         {
 705                                 /* Fatal error, set write error and bail */
 706                                 ServerInstance->Users->QuitUser(this, errno ? strerror(errno) : "Write error");
 707                                 return;
 708                         }
 709                 }
 710                 else
 711                 {
 712                         /* advance the queue */
 713                         if (n_sent)
 714                                 this->sendq = this->sendq.substr(n_sent);
 715                         /* update the user's stats counters */
 716                         this->bytes_out += n_sent;
 717                         this->cmds_out++;
 718                         if (n_sent != old_sendq_length)
 719                                 this->ServerInstance->SE->WantWrite(this);
 720                 }
 721         }
 722
 723         /* note: NOT else if! */
 724         if (this->sendq.empty())
 725         {
 726                 FOREACH_MOD(I_OnBufferFlushed,OnBufferFlushed(this));
 727         }
 728 }
 729
 730 void User::Oper(const std::string &opertype, const std::string &opername)
 731 {
 732         if (this->IsModeSet('o'))
 733                 this->UnOper();
 734
 735         this->modes[UM_OPERATOR] = 1;
 736         this->WriteServ("MODE %s :+o", this->nick.c_str());
 737         FOREACH_MOD(I_OnOper, OnOper(this, opertype));
 738
 739         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());
 740         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()));
 741
 742         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());
 743         this->oper.assign(opertype, 0, 512);
 744         ServerInstance->Users->all_opers.push_back(this);
 745
 746         /*
 747          * This might look like it's in the wrong place.
 748          * It is *not*!
 749          *
 750          * For multi-network servers, we may not have the opertypes of the remote server, but we still want to mark the user as an oper of that type.
 751          * -- w00t
 752          */
 753         opertype_t::iterator iter_opertype = ServerInstance->Config->opertypes.find(this->oper.c_str());
 754         if (iter_opertype != ServerInstance->Config->opertypes.end())
 755         {
 756                 if (AllowedOperCommands)
 757                         AllowedOperCommands->clear();
 758                 else
 759                         AllowedOperCommands = new std::set<std::string>;
 760
 761                 if (AllowedPrivs)
 762                         AllowedPrivs->clear();
 763                 else
 764                         AllowedPrivs = new std::set<std::string>;
 765
 766                 AllowedUserModes.reset();
 767                 AllowedChanModes.reset();
 768                 this->AllowedUserModes['o' - 'A'] = true; // Call me paranoid if you want.
 769
 770                 std::string myclass, mycmd, mypriv;
 771                 irc::spacesepstream Classes(iter_opertype->second.c_str());
 772                 while (Classes.GetToken(myclass))
 773                 {
 774                         operclass_t::iterator iter_operclass = ServerInstance->Config->operclass.find(myclass.c_str());
 775                         if (iter_operclass != ServerInstance->Config->operclass.end())
 776                         {
 777                                 /* Process commands */
 778                                 irc::spacesepstream CommandList(iter_operclass->second.commandlist);
 779                                 while (CommandList.GetToken(mycmd))
 780                                 {
 781                                         this->AllowedOperCommands->insert(mycmd);
 782                                 }
 783
 784                                 irc::spacesepstream PrivList(iter_operclass->second.privs);
 785                                 while (PrivList.GetToken(mypriv))
 786                                 {
 787                                         this->AllowedPrivs->insert(mypriv);
 788                                 }
 789
 790                                 for (unsigned char* c = (unsigned char*)iter_operclass->second.umodelist; *c; ++c)
 791                                 {
 792                                         if (*c == '*')
 793                                         {
 794                                                 this->AllowedUserModes.set();
 795                                         }
 796                                         else
 797                                         {
 798                                                 this->AllowedUserModes[*c - 'A'] = true;
 799                                         }
 800                                 }
 801
 802                                 for (unsigned char* c = (unsigned char*)iter_operclass->second.cmodelist; *c; ++c)
 803                                 {
 804                                         if (*c == '*')
 805                                         {
 806                                                 this->AllowedChanModes.set();
 807                                         }
 808                                         else
 809                                         {
 810                                                 this->AllowedChanModes[*c - 'A'] = true;
 811                                         }
 812                                 }
 813                         }
 814                 }
 815         }
 816
 817         FOREACH_MOD(I_OnPostOper,OnPostOper(this, opertype, opername));
 818 }
 819
 820 void User::UnOper()
 821 {
 822         if (IS_OPER(this))
 823         {
 824                 /*
 825                  * unset their oper type (what IS_OPER checks).
 826                  * note, order is important - this must come before modes as -o attempts
 827                  * to call UnOper. -- w00t
 828                  */
 829                 this->oper.clear();
 830
 831
 832                 /* Remove all oper only modes from the user when the deoper - Bug #466*/
 833                 std::string moderemove("-");
 834
 835                 for (unsigned char letter = 'A'; letter <= 'z'; letter++)
 836                 {
 837                         ModeHandler* mh = ServerInstance->Modes->FindMode(letter, MODETYPE_USER);
 838                         if (mh && mh->NeedsOper())
 839                                 moderemove += letter;
 840                 }
 841
 842
 843                 std::vector<std::string> parameters;
 844                 parameters.push_back(this->nick);
 845                 parameters.push_back(moderemove);
 846
 847                 ServerInstance->Parser->CallHandler("MODE", parameters, this);
 848
 849                 /* remove the user from the oper list. Will remove multiple entries as a safeguard against bug #404 */
 850                 ServerInstance->Users->all_opers.remove(this);
 851
 852                 if (AllowedOperCommands)
 853                 {
 854                         delete AllowedOperCommands;
 855                         AllowedOperCommands = NULL;
 856                 }
 857
 858                 if (AllowedPrivs)
 859                 {
 860                         delete AllowedPrivs;
 861                         AllowedPrivs = NULL;
 862                 }
 863
 864                 AllowedUserModes.reset();
 865                 AllowedChanModes.reset();
 866                 this->modes[UM_OPERATOR] = 0;
 867         }
 868 }
 869
 870 /* adds or updates an entry in the whowas list */
 871 void User::AddToWhoWas()
 872 {
 873         Command* whowas_command = ServerInstance->Parser->GetHandler("WHOWAS");
 874         if (whowas_command)
 875         {
 876                 std::deque<classbase*> params;
 877                 params.push_back(this);
 878                 whowas_command->HandleInternal(WHOWAS_ADD, params);
 879         }
 880 }
 881
 882 /*
 883  * Check class restrictions
 884  */
 885 void User::CheckClass()
 886 {
 887         ConnectClass* a = this->MyClass;
 888
 889         if ((!a) || (a->type == CC_DENY))
 890         {
 891                 ServerInstance->Users->QuitUser(this, "Unauthorised connection");
 892                 return;
 893         }
 894         else if ((a->GetMaxLocal()) && (ServerInstance->Users->LocalCloneCount(this) > a->GetMaxLocal()))
 895         {
 896                 ServerInstance->Users->QuitUser(this, "No more connections allowed from your host via this connect class (local)");
 897                 ServerInstance->SNO->WriteToSnoMask('a', "WARNING: maximum LOCAL connections (%ld) exceeded for IP %s", a->GetMaxLocal(), this->GetIPString());
 898                 return;
 899         }
 900         else if ((a->GetMaxGlobal()) && (ServerInstance->Users->GlobalCloneCount(this) > a->GetMaxGlobal()))
 901         {
 902                 ServerInstance->Users->QuitUser(this, "No more connections allowed from your host via this connect class (global)");
 903                 ServerInstance->SNO->WriteToSnoMask('a', "WARNING: maximum GLOBAL connections (%ld) exceeded for IP %s", a->GetMaxGlobal(), this->GetIPString());
 904                 return;
 905         }
 906
 907         this->nping = ServerInstance->Time() + a->GetPingTime() + ServerInstance->Config->dns_timeout;
 908 }
 909
 910 bool User::CheckLines(bool doZline)
 911 {
 912         const char* check[] = { "G" , "K", (doZline) ? "Z" : NULL, NULL };
 913
 914         if (!this->exempt)
 915         {
 916                 for (int n = 0; check[n]; ++n)
 917                 {
 918                         XLine *r = ServerInstance->XLines->MatchesLine(check[n], this);
 919
 920                         if (r)
 921                         {
 922                                 r->Apply(this);
 923                                 return true;
 924                         }
 925                 }
 926         }
 927
 928         return false;
 929 }
 930
 931 void User::FullConnect()
 932 {
 933         ServerInstance->stats->statsConnects++;
 934         this->idle_lastmsg = ServerInstance->Time();
 935
 936         /*
 937          * You may be thinking "wtf, we checked this in User::AddClient!" - and yes, we did, BUT.
 938          * At the time AddClient is called, we don't have a resolved host, by here we probably do - which
 939          * may put the user into a totally seperate class with different restrictions! so we *must* check again.
 940          * Don't remove this! -- w00t
 941          */
 942         this->SetClass();
 943
 944         /* Check the password, if one is required by the user's connect class.
 945          * This CANNOT be in CheckClass(), because that is called prior to PASS as well!
 946          */
 947         if (this->MyClass && !this->MyClass->GetPass().empty() && !this->haspassed)
 948         {
 949                 ServerInstance->Users->QuitUser(this, "Invalid password");
 950                 return;
 951         }
 952
 953         if (this->CheckLines())
 954                 return;
 955
 956         this->WriteServ("NOTICE Auth :Welcome to \002%s\002!",ServerInstance->Config->Network);
 957         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());
 958         this->WriteNumeric(RPL_YOURHOSTIS, "%s :Your host is %s, running version InspIRCd-1.2",this->nick.c_str(),ServerInstance->Config->ServerName);
 959         this->WriteNumeric(RPL_SERVERCREATED, "%s :This server was created %s %s", this->nick.c_str(), __TIME__, __DATE__);
 960         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());
 961
 962         ServerInstance->Config->Send005(this);
 963         this->WriteNumeric(RPL_YOURUUID, "%s %s :your unique ID", this->nick.c_str(), this->uuid.c_str());
 964
 965
 966         this->ShowMOTD();
 967
 968         /* Now registered */
 969         if (ServerInstance->Users->unregistered_count)
 970                 ServerInstance->Users->unregistered_count--;
 971
 972         /* Trigger LUSERS output, give modules a chance too */
 973         int MOD_RESULT = 0;
 974         std::string command("LUSERS");
 975         std::vector<std::string> parameters;
 976         FOREACH_RESULT(I_OnPreCommand, OnPreCommand(command, parameters, this, true, "LUSERS"));
 977         if (!MOD_RESULT)
 978                 ServerInstance->CallCommandHandler(command, parameters, this);
 979
 980         /*
 981          * We don't set REG_ALL until triggering OnUserConnect, so some module events don't spew out stuff
 982          * for a user that doesn't exist yet.
 983          */
 984         FOREACH_MOD(I_OnUserConnect,OnUserConnect(this));
 985
 986         this->registered = REG_ALL;
 987
 988         FOREACH_MOD(I_OnPostConnect,OnPostConnect(this));
 989
 990         ServerInstance->SNO->WriteToSnoMask('c',"Client connecting on port %d: %s!%s@%s [%s] [%s]",
 991                 this->GetServerPort(), this->nick.c_str(), this->ident.c_str(), this->host.c_str(), this->GetIPString(), this->fullname.c_str());
 992         ServerInstance->Logs->Log("BANCACHE", DEBUG, "BanCache: Adding NEGATIVE hit for %s", this->GetIPString());
 993         ServerInstance->BanCache->AddHit(this->GetIPString(), "", "");
 994 }
 995
 996 /** User::UpdateNick()
 997  * re-allocates a nick in the user_hash after they change nicknames,
 998  * returns a pointer to the new user as it may have moved
 999  */
1000 User* User::UpdateNickHash(const char* New)
1001 {
1002         //user_hash::iterator newnick;
1003         user_hash::iterator oldnick = ServerInstance->Users->clientlist->find(this->nick);
1004
1005         if (!irc::string(this->nick.c_str()).compare(New))
1006                 return oldnick->second;
1007
1008         if (oldnick == ServerInstance->Users->clientlist->end())
1009                 return NULL; /* doesnt exist */
1010
1011         User* olduser = oldnick->second;
1012         ServerInstance->Users->clientlist->erase(oldnick);
1013         (*(ServerInstance->Users->clientlist))[New] = olduser;
1014         return olduser;
1015 }
1016
1017 void User::InvalidateCache()
1018 {
1019         /* Invalidate cache */
1020         cached_fullhost.clear();
1021         cached_hostip.clear();
1022         cached_makehost.clear();
1023         cached_fullrealhost.clear();
1024 }
1025
1026 bool User::ForceNickChange(const char* newnick)
1027 {
1028         int MOD_RESULT = 0;
1029
1030         this->InvalidateCache();
1031
1032         this->Extend("NICKForced", "Enabled");
1033
1034         FOREACH_RESULT(I_OnUserPreNick,OnUserPreNick(this, newnick));
1035
1036         this->Shrink("NICKForced");
1037
1038         if (MOD_RESULT)
1039         {
1040                 ServerInstance->stats->statsCollisions++;
1041                 return false;
1042         }
1043
1044         std::deque<classbase*> dummy;
1045         Command* nickhandler = ServerInstance->Parser->GetHandler("NICK");
1046         if (nickhandler) // wtfbbq, when would this not be here
1047         {
1048                 std::vector<std::string> parameters;
1049                 nickhandler->HandleInternal(1, dummy);
1050                 parameters.push_back(newnick);
1051                 this->Extend("NICKForced", "Enabled");
1052                 bool result = (ServerInstance->Parser->CallHandler("NICK", parameters, this) == CMD_SUCCESS);
1053                 this->Shrink("NICKForced");
1054                 nickhandler->HandleInternal(0, dummy);
1055                 return result;
1056         }
1057
1058         // Unreachable, we hope
1059         return false;
1060 }
1061
1062 int User::GetServerPort()
1063 {
1064         switch (this->server_sa.sa.sa_family)
1065         {
1066                 case AF_INET6:
1067                         return htons(this->server_sa.in6.sin6_port);
1068                 case AF_INET:
1069                         return htons(this->server_sa.in4.sin_port);
1070         }
1071         return 0;
1072 }
1073
1074 const char* User::GetCIDRMask(int range)
1075 {
1076         static char buf[44];
1077
1078         if (range < 0)
1079                 throw "Negative range, sorry, no.";
1080
1081         /*
1082          * Original code written by Oliver Lupton (Om).
1083          * Integrated by me. Thanks. :) -- w00t
1084          */
1085         switch (this->client_sa.sa.sa_family)
1086         {
1087                 case AF_INET6:
1088                 {
1089                         /* unsigned char s6_addr[16]; */
1090                         struct in6_addr v6;
1091                         int i, bytestozero, extrabits;
1092                         char buffer[40];
1093
1094                         if(range > 128)
1095                                 throw "CIDR mask width greater than address width (IPv6, 128 bit)";
1096
1097                         /* To create the CIDR mask we want to set all the bits after 'range' bits of the address
1098                          * to zero. This means the last (128 - range) bits of the address must be set to zero.
1099                          * Hence this number divided by 8 is the number of whole bytes from the end of the address
1100                          * which must be set to zero.
1101                          */
1102                         bytestozero = (128 - range) / 8;
1103
1104                         /* Some of the least significant bits of the next most significant byte may also have to
1105                          * be zeroed. The number of bits is the remainder of the above division.
1106                          */
1107                         extrabits = (128 - range) % 8;
1108
1109                         /* Populate our working struct with the parts of the user's IP which are required in the
1110                          * final CIDR mask. Set all the subsequent bytes to zero.
1111                          * (16 - bytestozero) is the number of bytes which must be populated with actual IP data.
1112                          */
1113                         for(i = 0; i < (16 - bytestozero); i++)
1114                         {
1115                                 v6.s6_addr[i] = client_sa.in6.sin6_addr.s6_addr[i];
1116                         }
1117
1118                         /* And zero all the remaining bytes in the IP. */
1119                         for(; i < 16; i++)
1120                         {
1121                                 v6.s6_addr[i] = 0;
1122                         }
1123
1124                         /* And finally, zero the extra bits required. */
1125                         v6.s6_addr[15 - bytestozero] = (v6.s6_addr[15 - bytestozero] >> extrabits) << extrabits;
1126
1127                         snprintf(buf, 44, "%s/%d", inet_ntop(AF_INET6, &v6, buffer, 40), range);
1128                         return buf;
1129                 }
1130                 break;
1131                 case AF_INET:
1132                 {
1133                         struct in_addr v4;
1134                         char buffer[16];
1135
1136                         if (range > 32)
1137                                 throw "CIDR mask width greater than address width (IPv4, 32 bit)";
1138
1139                         /* Users already have a sockaddr* pointer (User::ip) which contains either a v4 or v6 structure */
1140                         v4.s_addr = client_sa.in4.sin_addr.s_addr;
1141
1142                         /* To create the CIDR mask we want to set all the bits after 'range' bits of the address
1143                          * to zero. This means the last (32 - range) bits of the address must be set to zero.
1144                          * This is done by shifting the value right and then back left by (32 - range) bits.
1145                          */
1146                         if(range > 0)
1147                         {
1148                                 v4.s_addr = ntohl(v4.s_addr);
1149                                 v4.s_addr = (v4.s_addr >> (32 - range)) << (32 - range);
1150                                 v4.s_addr = htonl(v4.s_addr);
1151                         }
1152                         else
1153                         {
1154                                 /* a range of zero would cause a 32 bit value to be shifted by 32 bits.
1155                                  * this has undefined behaviour, but for CIDR purposes the resulting mask
1156                                  * from a.b.c.d/0 is 0.0.0.0/0
1157                                  */
1158                                 v4.s_addr = 0;
1159                         }
1160
1161                         snprintf(buf, 44, "%s/%d", inet_ntop(AF_INET, &v4, buffer, 16), range);
1162                         return buf;
1163                 }
1164                 break;
1165         }
1166
1167         return ""; // unused, but oh well
1168 }
1169
1170 std::string User::GetServerIP()
1171 {
1172         int port;
1173         std::string ip;
1174         irc::sockets::satoap(&server_sa, ip, port);
1175         return ip;
1176 }
1177
1178 const char* User::GetIPString()
1179 {
1180         int port;
1181         if (cachedip.empty())
1182         {
1183                 irc::sockets::satoap(&client_sa, cachedip, port);
1184                 /* IP addresses starting with a : on irc are a Bad Thing (tm) */
1185                 if (cachedip.c_str()[0] == ':')
1186                         cachedip.insert(0,1,'0');
1187         }
1188
1189         return cachedip.c_str();
1190 }
1191
1192 bool User::SetClientIP(const char* sip)
1193 {
1194         this->cachedip = "";
1195         return irc::sockets::aptosa(sip, 0, &client_sa);
1196 }
1197
1198 /** NOTE: We cannot pass a const reference to this method.
1199  * The string is changed by the workings of the method,
1200  * so that if we pass const ref, we end up copying it to
1201  * something we can change anyway. Makes sense to just let
1202  * the compiler do that copy for us.
1203  */
1204 void User::Write(std::string text)
1205 {
1206         if (!ServerInstance->SE->BoundsCheckFd(this))
1207                 return;
1208
1209         try
1210         {
1211                 ServerInstance->Logs->Log("USEROUTPUT", DEBUG,"C[%d] O %s", this->GetFd(), text.c_str());
1212                 text.append("\r\n");
1213         }
1214         catch (...)
1215         {
1216                 ServerInstance->Logs->Log("USEROUTPUT", DEBUG,"Exception in User::Write() std::string::append");
1217                 return;
1218         }
1219
1220         if (this->GetIOHook())
1221         {
1222                 /* XXX: The lack of buffering here is NOT a bug, modules implementing this interface have to
1223                  * implement their own buffering mechanisms
1224                  */
1225                 try
1226                 {
1227                         this->GetIOHook()->OnRawSocketWrite(this->fd, text.data(), text.length());
1228                 }
1229                 catch (CoreException& modexcept)
1230                 {
1231                         ServerInstance->Logs->Log("USEROUTPUT", DEBUG, "%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
1232                 }
1233         }
1234         else
1235         {
1236                 this->AddWriteBuf(text);
1237         }
1238         ServerInstance->stats->statsSent += text.length();
1239         this->ServerInstance->SE->WantWrite(this);
1240 }
1241
1242 /** Write()
1243  */
1244 void User::Write(const char *text, ...)
1245 {
1246         va_list argsPtr;
1247         char textbuffer[MAXBUF];
1248
1249         va_start(argsPtr, text);
1250         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1251         va_end(argsPtr);
1252
1253         this->Write(std::string(textbuffer));
1254 }
1255
1256 void User::WriteServ(const std::string& text)
1257 {
1258         char textbuffer[MAXBUF];
1259
1260         snprintf(textbuffer,MAXBUF,":%s %s",ServerInstance->Config->ServerName,text.c_str());
1261         this->Write(std::string(textbuffer));
1262 }
1263
1264 /** WriteServ()
1265  *  Same as Write(), except `text' is prefixed with `:server.name '.
1266  */
1267 void User::WriteServ(const char* text, ...)
1268 {
1269         va_list argsPtr;
1270         char textbuffer[MAXBUF];
1271
1272         va_start(argsPtr, text);
1273         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1274         va_end(argsPtr);
1275
1276         this->WriteServ(std::string(textbuffer));
1277 }
1278
1279
1280 void User::WriteNumeric(unsigned int numeric, const char* text, ...)
1281 {
1282         va_list argsPtr;
1283         char textbuffer[MAXBUF];
1284
1285         va_start(argsPtr, text);
1286         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1287         va_end(argsPtr);
1288
1289         this->WriteNumeric(numeric, std::string(textbuffer));
1290 }
1291
1292 void User::WriteNumeric(unsigned int numeric, const std::string &text)
1293 {
1294         char textbuffer[MAXBUF];
1295         int MOD_RESULT = 0;
1296
1297         FOREACH_RESULT(I_OnNumeric, OnNumeric(this, numeric, text));
1298
1299         if (MOD_RESULT)
1300                 return;
1301
1302         snprintf(textbuffer,MAXBUF,":%s %03u %s",ServerInstance->Config->ServerName, numeric, text.c_str());
1303         this->Write(std::string(textbuffer));
1304 }
1305
1306 void User::WriteFrom(User *user, const std::string &text)
1307 {
1308         char tb[MAXBUF];
1309
1310         snprintf(tb,MAXBUF,":%s %s",user->GetFullHost().c_str(),text.c_str());
1311
1312         this->Write(std::string(tb));
1313 }
1314
1315
1316 /* write text from an originating user to originating user */
1317
1318 void User::WriteFrom(User *user, const char* text, ...)
1319 {
1320         va_list argsPtr;
1321         char textbuffer[MAXBUF];
1322
1323         va_start(argsPtr, text);
1324         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1325         va_end(argsPtr);
1326
1327         this->WriteFrom(user, std::string(textbuffer));
1328 }
1329
1330
1331 /* write text to an destination user from a source user (e.g. user privmsg) */
1332
1333 void User::WriteTo(User *dest, const char *data, ...)
1334 {
1335         char textbuffer[MAXBUF];
1336         va_list argsPtr;
1337
1338         va_start(argsPtr, data);
1339         vsnprintf(textbuffer, MAXBUF, data, argsPtr);
1340         va_end(argsPtr);
1341
1342         this->WriteTo(dest, std::string(textbuffer));
1343 }
1344
1345 void User::WriteTo(User *dest, const std::string &data)
1346 {
1347         dest->WriteFrom(this, data);
1348 }
1349
1350
1351 void User::WriteCommon(const char* text, ...)
1352 {
1353         char textbuffer[MAXBUF];
1354         va_list argsPtr;
1355
1356         if (this->registered != REG_ALL)
1357                 return;
1358
1359         va_start(argsPtr, text);
1360         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1361         va_end(argsPtr);
1362
1363         this->WriteCommon(std::string(textbuffer));
1364 }
1365
1366 void User::WriteCommon(const std::string &text)
1367 {
1368         bool sent_to_at_least_one = false;
1369         char tb[MAXBUF];
1370
1371         if (this->registered != REG_ALL)
1372                 return;
1373
1374         uniq_id++;
1375
1376         if (!already_sent)
1377                 InitializeAlreadySent(ServerInstance->SE);
1378
1379         /* We dont want to be doing this n times, just once */
1380         snprintf(tb,MAXBUF,":%s %s",this->GetFullHost().c_str(),text.c_str());
1381         std::string out = tb;
1382
1383         for (UCListIter v = this->chans.begin(); v != this->chans.end(); v++)
1384         {
1385                 CUList* ulist = v->first->GetUsers();
1386                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1387                 {
1388                         if ((IS_LOCAL(i->first)) && (already_sent[i->first->fd] != uniq_id))
1389                         {
1390                                 already_sent[i->first->fd] = uniq_id;
1391                                 i->first->Write(out);
1392                                 sent_to_at_least_one = true;
1393                         }
1394                 }
1395         }
1396
1397         /*
1398          * if the user was not in any channels, no users will receive the text. Make sure the user
1399          * receives their OWN message for WriteCommon
1400          */
1401         if (!sent_to_at_least_one)
1402         {
1403                 this->Write(std::string(tb));
1404         }
1405 }
1406
1407
1408 /* write a formatted string to all users who share at least one common
1409  * channel, NOT including the source user e.g. for use in QUIT
1410  */
1411
1412 void User::WriteCommonExcept(const char* text, ...)
1413 {
1414         char textbuffer[MAXBUF];
1415         va_list argsPtr;
1416
1417         va_start(argsPtr, text);
1418         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1419         va_end(argsPtr);
1420
1421         this->WriteCommonExcept(std::string(textbuffer));
1422 }
1423
1424 void User::WriteCommonQuit(const std::string &normal_text, const std::string &oper_text)
1425 {
1426         char tb1[MAXBUF];
1427         char tb2[MAXBUF];
1428
1429         if (this->registered != REG_ALL)
1430                 return;
1431
1432         uniq_id++;
1433
1434         if (!already_sent)
1435                 InitializeAlreadySent(ServerInstance->SE);
1436
1437         snprintf(tb1,MAXBUF,":%s QUIT :%s",this->GetFullHost().c_str(),normal_text.c_str());
1438         snprintf(tb2,MAXBUF,":%s QUIT :%s",this->GetFullHost().c_str(),oper_text.c_str());
1439         std::string out1 = tb1;
1440         std::string out2 = tb2;
1441
1442         for (UCListIter v = this->chans.begin(); v != this->chans.end(); v++)
1443         {
1444                 CUList *ulist = v->first->GetUsers();
1445                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1446                 {
1447                         if (this != i->first)
1448                         {
1449                                 if ((IS_LOCAL(i->first)) && (already_sent[i->first->fd] != uniq_id))
1450                                 {
1451                                         already_sent[i->first->fd] = uniq_id;
1452                                         i->first->Write(IS_OPER(i->first) ? out2 : out1);
1453                                 }
1454                         }
1455                 }
1456         }
1457 }
1458
1459 void User::WriteCommonExcept(const std::string &text)
1460 {
1461         char tb1[MAXBUF];
1462         std::string out1;
1463
1464         if (this->registered != REG_ALL)
1465                 return;
1466
1467         uniq_id++;
1468
1469         if (!already_sent)
1470                 InitializeAlreadySent(ServerInstance->SE);
1471
1472         snprintf(tb1,MAXBUF,":%s %s",this->GetFullHost().c_str(),text.c_str());
1473         out1 = tb1;
1474
1475         for (UCListIter v = this->chans.begin(); v != this->chans.end(); v++)
1476         {
1477                 CUList *ulist = v->first->GetUsers();
1478                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1479                 {
1480                         if (this != i->first)
1481                         {
1482                                 if ((IS_LOCAL(i->first)) && (already_sent[i->first->fd] != uniq_id))
1483                                 {
1484                                         already_sent[i->first->fd] = uniq_id;
1485                                         i->first->Write(out1);
1486                                 }
1487                         }
1488                 }
1489         }
1490
1491 }
1492
1493 void User::WriteWallOps(const std::string &text)
1494 {
1495         std::string wallop("WALLOPS :");
1496         wallop.append(text);
1497
1498         for (std::vector<User*>::const_iterator i = ServerInstance->Users->local_users.begin(); i != ServerInstance->Users->local_users.end(); i++)
1499         {
1500                 User* t = *i;
1501                 if (t->IsModeSet('w'))
1502                         this->WriteTo(t,wallop);
1503         }
1504 }
1505
1506 void User::WriteWallOps(const char* text, ...)
1507 {
1508         if (!IS_LOCAL(this))
1509                 return;
1510
1511         char textbuffer[MAXBUF];
1512         va_list argsPtr;
1513
1514         va_start(argsPtr, text);
1515         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1516         va_end(argsPtr);
1517
1518         this->WriteWallOps(std::string(textbuffer));
1519 }
1520
1521 /* return 0 or 1 depending if users u and u2 share one or more common channels
1522  * (used by QUIT, NICK etc which arent channel specific notices)
1523  *
1524  * The old algorithm in 1.0 for this was relatively inefficient, iterating over
1525  * the first users channels then the second users channels within the outer loop,
1526  * therefore it was a maximum of x*y iterations (upon returning 0 and checking
1527  * all possible iterations). However this new function instead checks against the
1528  * channel's userlist in the inner loop which is a std::map<User*,User*>
1529  * and saves us time as we already know what pointer value we are after.
1530  * Don't quote me on the maths as i am not a mathematician or computer scientist,
1531  * but i believe this algorithm is now x+(log y) maximum iterations instead.
1532  */
1533 bool User::SharesChannelWith(User *other)
1534 {
1535         if ((!other) || (this->registered != REG_ALL) || (other->registered != REG_ALL))
1536                 return false;
1537
1538         /* Outer loop */
1539         for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1540         {
1541                 /* Eliminate the inner loop (which used to be ~equal in size to the outer loop)
1542                  * by replacing it with a map::find which *should* be more efficient
1543                  */
1544                 if (i->first->HasUser(other))
1545                         return true;
1546         }
1547         return false;
1548 }
1549
1550 bool User::ChangeName(const char* gecos)
1551 {
1552         if (!this->fullname.compare(gecos))
1553                 return true;
1554
1555         if (IS_LOCAL(this))
1556         {
1557                 int MOD_RESULT = 0;
1558                 FOREACH_RESULT(I_OnChangeLocalUserGECOS,OnChangeLocalUserGECOS(this,gecos));
1559                 if (MOD_RESULT)
1560                         return false;
1561                 FOREACH_MOD(I_OnChangeName,OnChangeName(this,gecos));
1562         }
1563         this->fullname.assign(gecos, 0, ServerInstance->Config->Limits.MaxGecos);
1564
1565         return true;
1566 }
1567
1568 bool User::ChangeDisplayedHost(const char* shost)
1569 {
1570         if (dhost == shost)
1571                 return true;
1572
1573         if (IS_LOCAL(this))
1574         {
1575                 int MOD_RESULT = 0;
1576                 FOREACH_RESULT(I_OnChangeLocalUserHost,OnChangeLocalUserHost(this,shost));
1577                 if (MOD_RESULT)
1578                         return false;
1579         }
1580
1581         FOREACH_MOD(I_OnChangeHost, OnChangeHost(this,shost));
1582
1583         int MOD_RESULT = 0;
1584         FOREACH_RESULT(I_OnHostCycle, OnHostCycle(this));
1585
1586         if (this->ServerInstance->Config->CycleHosts && !MOD_RESULT)
1587                 this->WriteCommonExcept("QUIT :Changing hosts");
1588
1589         /* Fix by Om: User::dhost is 65 long, this was truncating some long hosts */
1590         this->dhost.assign(shost, 0, 64);
1591
1592         this->InvalidateCache();
1593
1594         if (this->ServerInstance->Config->CycleHosts && !MOD_RESULT)
1595         {
1596                 for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1597                 {
1598                         i->first->WriteAllExceptSender(this, false, 0, "JOIN %s", i->first->name.c_str());
1599                         std::string n = this->ServerInstance->Modes->ModeString(this, i->first);
1600                         if (n.length() > 0)
1601                                 i->first->WriteAllExceptSender(this, true, 0, "MODE %s +%s", i->first->name.c_str(), n.c_str());
1602                 }
1603         }
1604
1605         if (IS_LOCAL(this))
1606                 this->WriteNumeric(RPL_YOURDISPLAYEDHOST, "%s %s :is now your displayed host",this->nick.c_str(),this->dhost.c_str());
1607
1608         return true;
1609 }
1610
1611 bool User::ChangeIdent(const char* newident)
1612 {
1613         if (this->ident == newident)
1614                 return true;
1615
1616         int MOD_RESULT = 0;
1617         FOREACH_RESULT(I_OnHostCycle, OnHostCycle(this));
1618
1619         if (this->ServerInstance->Config->CycleHosts && !MOD_RESULT)
1620                 this->WriteCommonExcept("%s","QUIT :Changing ident");
1621
1622         this->ident.assign(newident, 0, ServerInstance->Config->Limits.IdentMax + 1);
1623
1624         this->InvalidateCache();
1625
1626         if (this->ServerInstance->Config->CycleHosts && !MOD_RESULT)
1627         {
1628                 for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1629                 {
1630                         i->first->WriteAllExceptSender(this, false, 0, "JOIN %s", i->first->name.c_str());
1631                         std::string n = this->ServerInstance->Modes->ModeString(this, i->first);
1632                         if (n.length() > 0)
1633                                 i->first->WriteAllExceptSender(this, true, 0, "MODE %s +%s", i->first->name.c_str(), n.c_str());
1634                 }
1635         }
1636
1637         return true;
1638 }
1639
1640 void User::SendAll(const char* command, const char* text, ...)
1641 {
1642         char textbuffer[MAXBUF];
1643         char formatbuffer[MAXBUF];
1644         va_list argsPtr;
1645
1646         va_start(argsPtr, text);
1647         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1648         va_end(argsPtr);
1649
1650         snprintf(formatbuffer,MAXBUF,":%s %s $* :%s", this->GetFullHost().c_str(), command, textbuffer);
1651         std::string fmt = formatbuffer;
1652
1653         for (std::vector<User*>::const_iterator i = ServerInstance->Users->local_users.begin(); i != ServerInstance->Users->local_users.end(); i++)
1654         {
1655                 (*i)->Write(fmt);
1656         }
1657 }
1658
1659
1660 std::string User::ChannelList(User* source)
1661 {
1662         std::string list;
1663
1664         for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1665         {
1666                 /* If the target is the same as the sender, let them see all their channels.
1667                  * If the channel is NOT private/secret OR the user shares a common channel
1668                  * If the user is an oper, and the <options:operspywhois> option is set.
1669                  */
1670                 if ((source == this) || (IS_OPER(source) && ServerInstance->Config->OperSpyWhois) || (((!i->first->IsModeSet('p')) && (!i->first->IsModeSet('s'))) || (i->first->HasUser(source))))
1671                 {
1672                         list.append(i->first->GetPrefixChar(this)).append(i->first->name).append(" ");
1673                 }
1674         }
1675
1676         return list;
1677 }
1678
1679 void User::SplitChanList(User* dest, const std::string &cl)
1680 {
1681         std::string line;
1682         std::ostringstream prefix;
1683         std::string::size_type start, pos, length;
1684
1685         prefix << this->nick << " " << dest->nick << " :";
1686         line = prefix.str();
1687         int namelen = strlen(ServerInstance->Config->ServerName) + 6;
1688
1689         for (start = 0; (pos = cl.find(' ', start)) != std::string::npos; start = pos+1)
1690         {
1691                 length = (pos == std::string::npos) ? cl.length() : pos;
1692
1693                 if (line.length() + namelen + length - start > 510)
1694                 {
1695                         ServerInstance->SendWhoisLine(this, dest, 319, "%s", line.c_str());
1696                         line = prefix.str();
1697                 }
1698
1699                 if(pos == std::string::npos)
1700                 {
1701                         line.append(cl.substr(start, length - start));
1702                         break;
1703                 }
1704                 else
1705                 {
1706                         line.append(cl.substr(start, length - start + 1));
1707                 }
1708         }
1709
1710         if (line.length())
1711         {
1712                 ServerInstance->SendWhoisLine(this, dest, 319, "%s", line.c_str());
1713         }
1714 }
1715
1716 /*
1717  * Sets a user's connection class.
1718  * If the class name is provided, it will be used. Otherwise, the class will be guessed using host/ip/ident/etc.
1719  * NOTE: If the <ALLOW> or <DENY> tag specifies an ip, and this user resolves,
1720  * then their ip will be taken as 'priority' anyway, so for example,
1721  * <connect allow="127.0.0.1"> will match joe!bloggs@localhost
1722  */
1723 ConnectClass* User::SetClass(const std::string &explicit_name)
1724 {
1725         ConnectClass *found = NULL;
1726
1727         if (!IS_LOCAL(this))
1728                 return NULL;
1729
1730         ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Setting connect class for UID %s", this->uuid.c_str());
1731
1732         if (!explicit_name.empty())
1733         {
1734                 for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++)
1735                 {
1736                         ConnectClass* c = *i;
1737
1738                         if (explicit_name == c->name)
1739                         {
1740                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Explicitly set to %s", explicit_name.c_str());
1741                                 found = c;
1742                         }
1743                 }
1744         }
1745         else
1746         {
1747                 for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++)
1748                 {
1749                         ConnectClass* c = *i;
1750
1751                         if (c->type == CC_ALLOW)
1752                         {
1753                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "ALLOW %s %d %s", c->host.c_str(), c->GetPort(), c->GetName().c_str());
1754                         }
1755                         else
1756                         {
1757                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "DENY %s %d %s", c->GetHost().c_str(), c->GetPort(), c->GetName().c_str());
1758                         }
1759
1760                         /* check if host matches.. */
1761                         if (c->GetHost().length() && !InspIRCd::MatchCIDR(this->GetIPString(), c->GetHost(), NULL) &&
1762                             !InspIRCd::MatchCIDR(this->host, c->GetHost(), NULL))
1763                         {
1764                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "No host match (for %s)", c->GetHost().c_str());
1765                                 continue;
1766                         }
1767
1768                         /*
1769                          * deny change if change will take class over the limit check it HERE, not after we found a matching class,
1770                          * because we should attempt to find another class if this one doesn't match us. -- w00t
1771                          */
1772                         if (c->limit && (c->RefCount >= c->limit))
1773                         {
1774                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "OOPS: Connect class limit (%lu) hit, denying", c->limit);
1775                                 continue;
1776                         }
1777
1778                         /* if it requires a port ... */
1779                         if (c->GetPort())
1780                         {
1781                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Requires port (%d)", c->GetPort());
1782
1783                                 /* and our port doesn't match, fail. */
1784                                 if (this->GetServerPort() != c->GetPort())
1785                                 {
1786                                         ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Port match failed (%d)", this->GetServerPort());
1787                                         continue;
1788                                 }
1789                         }
1790
1791                         /* we stop at the first class that meets ALL critera. */
1792                         found = c;
1793                         break;
1794                 }
1795         }
1796
1797         /*
1798          * Okay, assuming we found a class that matches.. switch us into that class, keeping refcounts up to date.
1799          */
1800         if (found)
1801         {
1802                 /* only fiddle with refcounts if they are already in a class .. */
1803                 if (this->MyClass)
1804                 {
1805                         if (found == this->MyClass) // no point changing this shit :P
1806                                 return this->MyClass;
1807                         this->MyClass->RefCount--;
1808                         ServerInstance->Logs->Log("USERS", DEBUG, "Untying user from connect class -- refcount: %lu", this->MyClass->RefCount);
1809                         if (MyClass->RefCount == 0)
1810                                 delete MyClass;
1811                 }
1812
1813                 this->MyClass = found;
1814                 this->MyClass->RefCount++;
1815                 ServerInstance->Logs->Log("USERS", DEBUG, "User tied to new class -- connect refcount now: %lu", this->MyClass->RefCount);
1816         }
1817
1818         return this->MyClass;
1819 }
1820
1821 /* looks up a users password for their connection class (<ALLOW>/<DENY> tags)
1822  * NOTE: If the <ALLOW> or <DENY> tag specifies an ip, and this user resolves,
1823  * then their ip will be taken as 'priority' anyway, so for example,
1824  * <connect allow="127.0.0.1"> will match joe!bloggs@localhost
1825  */
1826 ConnectClass* User::GetClass()
1827 {
1828         return this->MyClass;
1829 }
1830
1831 void User::PurgeEmptyChannels()
1832 {
1833         std::vector<Channel*> to_delete;
1834
1835         // firstly decrement the count on each channel
1836         for (UCListIter f = this->chans.begin(); f != this->chans.end(); f++)
1837         {
1838                 f->first->RemoveAllPrefixes(this);
1839                 if (f->first->DelUser(this) == 0)
1840                 {
1841                         /* No users left in here, mark it for deletion */
1842                         try
1843                         {
1844                                 to_delete.push_back(f->first);
1845                         }
1846                         catch (...)
1847                         {
1848                                 ServerInstance->Logs->Log("USERS", DEBUG,"Exception in User::PurgeEmptyChannels to_delete.push_back()");
1849                         }
1850                 }
1851         }
1852
1853         for (std::vector<Channel*>::iterator n = to_delete.begin(); n != to_delete.end(); n++)
1854         {
1855                 Channel* thischan = *n;
1856                 chan_hash::iterator i2 = ServerInstance->chanlist->find(thischan->name);
1857                 if (i2 != ServerInstance->chanlist->end())
1858                 {
1859                         int MOD_RESULT = 0;
1860                         FOREACH_RESULT_I(ServerInstance,I_OnChannelPreDelete, OnChannelPreDelete(i2->second));
1861                         if (MOD_RESULT == 1)
1862                                 continue; // delete halted by module
1863                         FOREACH_MOD(I_OnChannelDelete,OnChannelDelete(i2->second));
1864                         delete i2->second;
1865                         ServerInstance->chanlist->erase(i2);
1866                         this->chans.erase(*n);
1867                 }
1868         }
1869
1870         this->UnOper();
1871 }
1872
1873 void User::ShowMOTD()
1874 {
1875         if (!ServerInstance->Config->MOTD.size())
1876         {
1877                 this->WriteNumeric(ERR_NOMOTD, "%s :Message of the day file is missing.",this->nick.c_str());
1878                 return;
1879         }
1880         this->WriteNumeric(RPL_MOTDSTART, "%s :%s message of the day", this->nick.c_str(), ServerInstance->Config->ServerName);
1881
1882         for (file_cache::iterator i = ServerInstance->Config->MOTD.begin(); i != ServerInstance->Config->MOTD.end(); i++)
1883                 this->WriteNumeric(RPL_MOTD, "%s :- %s",this->nick.c_str(),i->c_str());
1884
1885         this->WriteNumeric(RPL_ENDOFMOTD, "%s :End of message of the day.", this->nick.c_str());
1886 }
1887
1888 void User::ShowRULES()
1889 {
1890         if (!ServerInstance->Config->RULES.size())
1891         {
1892                 this->WriteNumeric(ERR_NORULES, "%s :RULES File is missing",this->nick.c_str());
1893                 return;
1894         }
1895
1896         this->WriteNumeric(RPL_RULESTART, "%s :- %s Server Rules -",this->nick.c_str(),ServerInstance->Config->ServerName);
1897
1898         for (file_cache::iterator i = ServerInstance->Config->RULES.begin(); i != ServerInstance->Config->RULES.end(); i++)
1899                 this->WriteNumeric(RPL_RULES, "%s :- %s",this->nick.c_str(),i->c_str());
1900
1901         this->WriteNumeric(RPL_RULESEND, "%s :End of RULES command.",this->nick.c_str());
1902 }
1903
1904 void User::HandleEvent(EventType et, int errornum)
1905 {
1906         if (this->quitting) // drop everything, user is due to be quit
1907                 return;
1908
1909         switch (et)
1910         {
1911                 case EVENT_READ:
1912                         ServerInstance->ProcessUser(this);
1913                 break;
1914                 case EVENT_WRITE:
1915                         this->FlushWriteBuf();
1916                 break;
1917                 case EVENT_ERROR:
1918                         ServerInstance->Users->QuitUser(this, errornum ? strerror(errornum) : "Client closed the connection");
1919                 break;
1920         }
1921 }
1922
1923 void User::SetOperQuit(const std::string &oquit)
1924 {
1925         operquitmsg = oquit;
1926 }
1927
1928 const std::string& User::GetOperQuit()
1929 {
1930         return operquitmsg;
1931 }
1932
1933 void User::IncreasePenalty(int increase)
1934 {
1935         this->Penalty += increase;
1936 }
1937
1938 void User::DecreasePenalty(int decrease)
1939 {
1940         this->Penalty -= decrease;
1941 }
1942
1943 void FakeUser::SetFakeServer(std::string name)
1944 {
1945         this->nick = name;
1946         this->server = nick.c_str();
1947 }
1948
1949 const std::string FakeUser::GetFullHost()
1950 {
1951         if (*ServerInstance->Config->HideWhoisServer)
1952                 return ServerInstance->Config->HideWhoisServer;
1953         return nick;
1954 }
1955
1956 const std::string FakeUser::GetFullRealHost()
1957 {
1958         if (*ServerInstance->Config->HideWhoisServer)
1959                 return ServerInstance->Config->HideWhoisServer;
1960         return nick;
1961 }
1962
1963 VisData::VisData()
1964 {
1965 }
1966
1967 VisData::~VisData()
1968 {
1969 }
1970
1971 bool VisData::VisibleTo(User* user)
1972 {
1973         return true;
1974 }
1975
1976
1977 ConnectClass::ConnectClass(char t, const std::string& mask)
1978         : type(t), name("unnamed"), registration_timeout(0), host(mask), pingtime(0), pass(""), hash(""), sendqmax(0), recvqmax(0), maxlocal(0), maxglobal(0), maxchans(0), port(0), limit(0), RefCount(1)
1979 {
1980 }
1981
1982 ConnectClass::ConnectClass(char t, const std::string& mask, const ConnectClass& parent)
1983         : type(t), name("unnamed"), registration_timeout(parent.registration_timeout), host(mask), pingtime(parent.pingtime), pass(parent.pass), hash(parent.hash), sendqmax(parent.sendqmax), recvqmax(parent.recvqmax), maxlocal(parent.maxlocal), maxglobal(parent.maxglobal), maxchans(parent.maxchans), port(parent.port), limit(parent.limit), RefCount(1)
1984 {
1985 }
1986
1987 void ConnectClass::Update(const ConnectClass* src)
1988 {
1989         name = src->name;
1990         registration_timeout = src->registration_timeout;
1991         host = src->host;
1992         pingtime = src->pingtime;
1993         pass = src->pass;
1994         hash = src->hash;
1995         sendqmax = src->sendqmax;
1996         recvqmax = src->recvqmax;
1997         maxlocal = src->maxlocal;
1998         maxglobal = src->maxglobal;
1999         limit = src->limit;
2000 }