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 "wildcard.h"
  20 #include "xline.h"
  21 #include "bancache.h"
  22 #include "commands/cmd_whowas.h"
  23
  24 /* XXX: Used for speeding up WriteCommon operations */
  25 unsigned long uniq_id = 1;
  26
  27 static unsigned long* already_sent = NULL;
  28
  29
  30 void InitializeAlreadySent(SocketEngine* SE)
  31 {
  32         already_sent = new unsigned long[SE->GetMaxFds()];
  33         memset(already_sent, 0, SE->GetMaxFds() * sizeof(unsigned long));
  34 }
  35
  36
  37 std::string User::ProcessNoticeMasks(const char *sm)
  38 {
  39         bool adding = true, oldadding = false;
  40         const char *c = sm;
  41         std::string output;
  42
  43         while (c && *c)
  44         {
  45                 switch (*c)
  46                 {
  47                         case '+':
  48                                 adding = true;
  49                         break;
  50                         case '-':
  51                                 adding = false;
  52                         break;
  53                         case '*':
  54                                 for (unsigned char d = 'A'; d <= 'z'; d++)
  55                                 {
  56                                         if (ServerInstance->SNO->IsEnabled(d))
  57                                         {
  58                                                 if ((!IsNoticeMaskSet(d) && adding) || (IsNoticeMaskSet(d) && !adding))
  59                                                 {
  60                                                         if ((oldadding != adding) || (!output.length()))
  61                                                                 output += (adding ? '+' : '-');
  62
  63                                                         this->SetNoticeMask(d, adding);
  64
  65                                                         output += d;
  66                                                 }
  67                                         }
  68                                         oldadding = adding;
  69                                 }
  70                         break;
  71                         default:
  72                                 if ((*c >= 'A') && (*c <= 'z') && (ServerInstance->SNO->IsEnabled(*c)))
  73                                 {
  74                                         if ((!IsNoticeMaskSet(*c) && adding) || (IsNoticeMaskSet(*c) && !adding))
  75                                         {
  76                                                 if ((oldadding != adding) || (!output.length()))
  77                                                         output += (adding ? '+' : '-');
  78
  79                                                 this->SetNoticeMask(*c, adding);
  80
  81                                                 output += *c;
  82                                         }
  83                                 }
  84                                 else
  85                                         this->WriteNumeric(ERR_UNKNOWNSNOMASK, "%s %c :is unknown snomask char to me", this->nick.c_str(), *c);
  86
  87                                 oldadding = adding;
  88                         break;
  89                 }
  90
  91                 *c++;
  92         }
  93
  94         return output;
  95 }
  96
  97 void User::StartDNSLookup()
  98 {
  99         try
 100         {
 101                 bool cached = false;
 102                 const char* sip = this->GetIPString(false);
 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         return (snomasks[sm-65]);
 121 }
 122
 123 void User::SetNoticeMask(unsigned char sm, bool value)
 124 {
 125         snomasks[sm-65] = value;
 126 }
 127
 128 const char* User::FormatNoticeMasks()
 129 {
 130         static char data[MAXBUF];
 131         int offset = 0;
 132
 133         for (int n = 0; n < 64; n++)
 134         {
 135                 if (snomasks[n])
 136                         data[offset++] = n+65;
 137         }
 138
 139         data[offset] = 0;
 140         return data;
 141 }
 142
 143
 144
 145 bool User::IsModeSet(unsigned char m)
 146 {
 147         return (modes[m-65]);
 148 }
 149
 150 void User::SetMode(unsigned char m, bool value)
 151 {
 152         modes[m-65] = value;
 153 }
 154
 155 const char* User::FormatModes()
 156 {
 157         static char data[MAXBUF];
 158         int offset = 0;
 159         for (int n = 0; n < 64; n++)
 160         {
 161                 if (modes[n])
 162                         data[offset++] = n+65;
 163         }
 164         data[offset] = 0;
 165         return data;
 166 }
 167
 168 void User::DecrementModes()
 169 {
 170         ServerInstance->Logs->Log("USERS", DEBUG, "DecrementModes()");
 171         for (unsigned char n = 'A'; n <= 'z'; n++)
 172         {
 173                 if (modes[n-65])
 174                 {
 175                         ServerInstance->Logs->Log("USERS", DEBUG,"DecrementModes() found mode %c", n);
 176                         ModeHandler* mh = ServerInstance->Modes->FindMode(n, MODETYPE_USER);
 177                         if (mh)
 178                         {
 179                                 ServerInstance->Logs->Log("USERS", DEBUG,"Found handler %c and call ChangeCount", n);
 180                                 mh->ChangeCount(-1);
 181                         }
 182                 }
 183         }
 184 }
 185
 186 User::User(InspIRCd* Instance, const std::string &uid) : ServerInstance(Instance)
 187 {
 188         server = (char*)Instance->FindServerNamePtr(Instance->Config->ServerName);
 189         reset_due = ServerInstance->Time();
 190         age = ServerInstance->Time();
 191         Penalty = 0;
 192         lines_in = lastping = signon = idle_lastmsg = nping = registered = 0;
 193         bytes_in = bytes_out = cmds_in = cmds_out = 0;
 194         quietquit = OverPenalty = ExemptFromPenalty = quitting = exempt = haspassed = dns_done = false;
 195         fd = -1;
 196         recvq.clear();
 197         sendq.clear();
 198         res_forward = res_reverse = NULL;
 199         Visibility = NULL;
 200         ip = NULL;
 201         MyClass = NULL;
 202         io = NULL;
 203         AllowedUserModes = NULL;
 204         AllowedChanModes = NULL;
 205         AllowedOperCommands = NULL;
 206         chans.clear();
 207         invites.clear();
 208
 209         if (uid.empty())
 210                 uuid.assign(Instance->GetUID(), 0, UUID_LENGTH - 1);
 211         else
 212                 uuid.assign(uid, 0, UUID_LENGTH - 1);
 213
 214         ServerInstance->Logs->Log("USERS", DEBUG,"New UUID for user: %s (%s)", uuid.c_str(), uid.empty() ? "allocated new" : "used remote");
 215
 216         user_hash::iterator finduuid = Instance->Users->uuidlist->find(uuid);
 217         if (finduuid == Instance->Users->uuidlist->end())
 218                 (*Instance->Users->uuidlist)[uuid] = this;
 219         else
 220                 throw CoreException("Duplicate UUID "+std::string(uuid)+" in User constructor");
 221 }
 222
 223 User::~User()
 224 {
 225         /* NULL for remote users :) */
 226         if (this->MyClass)
 227         {
 228                 this->MyClass->RefCount--;
 229                 ServerInstance->Logs->Log("USERS", DEBUG, "User destructor -- connect refcount now: %lu", this->MyClass->RefCount);
 230         }
 231         if (this->AllowedOperCommands)
 232         {
 233                 delete AllowedOperCommands;
 234                 AllowedOperCommands = NULL;
 235         }
 236
 237         if (this->AllowedUserModes)
 238         {
 239                 delete[] AllowedUserModes;
 240                 AllowedUserModes = NULL;
 241         }
 242
 243         if (this->AllowedChanModes)
 244         {
 245                 delete[] AllowedChanModes;
 246                 AllowedChanModes = NULL;
 247         }
 248
 249         this->InvalidateCache();
 250         this->DecrementModes();
 251
 252         if (ip)
 253         {
 254                 ServerInstance->Users->RemoveCloneCounts(this);
 255
 256                 if (this->GetProtocolFamily() == AF_INET)
 257                 {
 258                         delete (sockaddr_in*)ip;
 259                 }
 260 #ifdef SUPPORT_IP6LINKS
 261                 else
 262                 {
 263                         delete (sockaddr_in6*)ip;
 264                 }
 265 #endif
 266         }
 267
 268         ServerInstance->Users->uuidlist->erase(uuid);
 269 }
 270
 271 const std::string& User::MakeHost()
 272 {
 273         if (!this->cached_makehost.empty())
 274                 return this->cached_makehost;
 275
 276         char nhost[MAXBUF];
 277         /* This is much faster than snprintf */
 278         char* t = nhost;
 279         for(const char* n = ident.c_str(); *n; n++)
 280                 *t++ = *n;
 281         *t++ = '@';
 282         for(const char* n = host.c_str(); *n; n++)
 283                 *t++ = *n;
 284         *t = 0;
 285
 286         this->cached_makehost.assign(nhost);
 287
 288         return this->cached_makehost;
 289 }
 290
 291 const std::string& User::MakeHostIP()
 292 {
 293         if (!this->cached_hostip.empty())
 294                 return this->cached_hostip;
 295
 296         char ihost[MAXBUF];
 297         /* This is much faster than snprintf */
 298         char* t = ihost;
 299         for(const char* n = ident.c_str(); *n; n++)
 300                 *t++ = *n;
 301         *t++ = '@';
 302         for(const char* n = this->GetIPString(); *n; n++)
 303                 *t++ = *n;
 304         *t = 0;
 305
 306         this->cached_hostip = ihost;
 307
 308         return this->cached_hostip;
 309 }
 310
 311 void User::CloseSocket()
 312 {
 313         if (this->fd > -1)
 314         {
 315                 ServerInstance->SE->Shutdown(this, 2);
 316                 ServerInstance->SE->Close(this);
 317         }
 318 }
 319
 320 const std::string& User::GetFullHost()
 321 {
 322         if (!this->cached_fullhost.empty())
 323                 return this->cached_fullhost;
 324
 325         char result[MAXBUF];
 326         char* t = result;
 327         for(const char* n = nick.c_str(); *n; n++)
 328                 *t++ = *n;
 329         *t++ = '!';
 330         for(const char* n = ident.c_str(); *n; n++)
 331                 *t++ = *n;
 332         *t++ = '@';
 333         for(const char* n = dhost.c_str(); *n; n++)
 334                 *t++ = *n;
 335         *t = 0;
 336
 337         this->cached_fullhost = result;
 338
 339         return this->cached_fullhost;
 340 }
 341
 342 char* User::MakeWildHost()
 343 {
 344         static char nresult[MAXBUF];
 345         char* t = nresult;
 346         *t++ = '*';     *t++ = '!';
 347         *t++ = '*';     *t++ = '@';
 348         for(const char* n = dhost.c_str(); *n; n++)
 349                 *t++ = *n;
 350         *t = 0;
 351         return nresult;
 352 }
 353
 354 int User::ReadData(void* buffer, size_t size)
 355 {
 356         if (IS_LOCAL(this))
 357         {
 358 #ifndef WIN32
 359                 return read(this->fd, buffer, size);
 360 #else
 361                 return recv(this->fd, (char*)buffer, size, 0);
 362 #endif
 363         }
 364         else
 365                 return 0;
 366 }
 367
 368
 369 const std::string& User::GetFullRealHost()
 370 {
 371         if (!this->cached_fullrealhost.empty())
 372                 return this->cached_fullrealhost;
 373
 374         char fresult[MAXBUF];
 375         char* t = fresult;
 376         for(const char* n = nick.c_str(); *n; n++)
 377                 *t++ = *n;
 378         *t++ = '!';
 379         for(const char* n = ident.c_str(); *n; n++)
 380                 *t++ = *n;
 381         *t++ = '@';
 382         for(const char* n = host.c_str(); *n; n++)
 383                 *t++ = *n;
 384         *t = 0;
 385
 386         this->cached_fullrealhost = fresult;
 387
 388         return this->cached_fullrealhost;
 389 }
 390
 391 bool User::IsInvited(const irc::string &channel)
 392 {
 393         time_t now = time(NULL);
 394         InvitedList::iterator safei;
 395         for (InvitedList::iterator i = invites.begin(); i != invites.end(); ++i)
 396         {
 397                 if (channel == i->first)
 398                 {
 399                         if (i->second != 0 && now > i->second)
 400                         {
 401                                 /* Expired invite, remove it. */
 402                                 safei = i;
 403                                 --i;
 404                                 invites.erase(safei);
 405                                 continue;
 406                         }
 407                         return true;
 408                 }
 409         }
 410         return false;
 411 }
 412
 413 InvitedList* User::GetInviteList()
 414 {
 415         time_t now = time(NULL);
 416         /* Weed out expired invites here. */
 417         InvitedList::iterator safei;
 418         for (InvitedList::iterator i = invites.begin(); i != invites.end(); ++i)
 419         {
 420                 if (i->second != 0 && now > i->second)
 421                 {
 422                         /* Expired invite, remove it. */
 423                         safei = i;
 424                         --i;
 425                         invites.erase(safei);
 426                 }
 427         }
 428         return &invites;
 429 }
 430
 431 void User::InviteTo(const irc::string &channel, time_t invtimeout)
 432 {
 433         time_t now = time(NULL);
 434         if (invtimeout != 0 && now > invtimeout) return; /* Don't add invites that are expired from the get-go. */
 435         for (InvitedList::iterator i = invites.begin(); i != invites.end(); ++i)
 436         {
 437                 if (channel == i->first)
 438                 {
 439                         if (i->second != 0 && invtimeout > i->second)
 440                         {
 441                                 i->second = invtimeout;
 442                         }
 443                 }
 444         }
 445         invites.push_back(std::make_pair(channel, invtimeout));
 446 }
 447
 448 void User::RemoveInvite(const irc::string &channel)
 449 {
 450         for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
 451         {
 452                 if (channel == i->first)
 453                 {
 454                         invites.erase(i);
 455                         return;
 456                 }
 457         }
 458 }
 459
 460 bool User::HasModePermission(unsigned char mode, ModeType type)
 461 {
 462         if (!IS_LOCAL(this))
 463                 return true;
 464
 465         if (!IS_OPER(this))
 466                 return false;
 467
 468         if (!AllowedUserModes || !AllowedChanModes)
 469                 return false;
 470
 471         return ((type == MODETYPE_USER ? AllowedUserModes : AllowedChanModes))[(mode - 'A')];
 472
 473 }
 474
 475 bool User::HasPermission(const std::string &command)
 476 {
 477         /*
 478          * users on remote servers can completely bypass all permissions based checks.
 479          * This prevents desyncs when one server has different type/class tags to another.
 480          * That having been said, this does open things up to the possibility of source changes
 481          * allowing remote kills, etc - but if they have access to the src, they most likely have
 482          * access to the conf - so it's an end to a means either way.
 483          */
 484         if (!IS_LOCAL(this))
 485                 return true;
 486
 487         // are they even an oper at all?
 488         if (!IS_OPER(this))
 489         {
 490                 return false;
 491         }
 492
 493         if (!AllowedOperCommands)
 494                 return false;
 495
 496         if (AllowedOperCommands->find(command) != AllowedOperCommands->end())
 497                 return true;
 498         else if (AllowedOperCommands->find("*") != AllowedOperCommands->end())
 499                 return true;
 500
 501         return false;
 502 }
 503
 504 bool User::AddBuffer(const std::string &a)
 505 {
 506         std::string::size_type start = 0;
 507         std::string::size_type i = a.find('\r');
 508
 509         /*
 510          * The old implementation here took a copy, and rfind() on \r, removing as it found them, before
 511          * copying a second time onto the recvq. That's ok, but involves three copies minimum (recv() to buffer,
 512          * buffer to here, here to recvq) - The new method now copies twice (recv() to buffer, buffer to recvq).
 513          *
 514          * We use find() instead of rfind() for clarity, however unlike the old code, our scanning of the string is
 515          * contiguous: as we specify a startpoint, we never see characters we have scanned previously, making this
 516          * marginally faster in cases with a number of \r hidden early on in the buffer.
 517          *
 518          * How it works:
 519          * Start at first pos of string, find first \r, append everything in the chunk (excluding \r) to recvq. Set
 520          * i ahead of the \r, search for next \r, add next chunk to buffer... repeat.
 521          *              -- w00t (7 may, 2008)
 522          */
 523         if (i == std::string::npos)
 524         {
 525                 // no \r that we need to dance around, just add to buffer
 526                 recvq.append(a);
 527         }
 528         else
 529         {
 530                 // While we can find the end of a chunk to add
 531                 while (i != std::string::npos)
 532                 {
 533                         // Append the chunk that we have
 534                         recvq.append(a, start, (i - start));
 535
 536                         // Start looking for the next one
 537                         start = i + 1;
 538                         i = a.find('\r', start);
 539                 }
 540
 541                 if (start != a.length())
 542                 {
 543                         /*
 544                          * This is here to catch a corner case when we get something like:
 545                          * NICK w0
 546                          * 0t\r\nU
 547                          * SER ...
 548                          * in successive calls to us.
 549                          *
 550                          * Without this conditional, the 'U' on the second case will be dropped,
 551                          * which is most *certainly* not the behaviour we want!
 552                          *              -- w00t
 553                          */
 554                         recvq.append(a, start, (a.length() - start));
 555                 }
 556         }
 557
 558         if (this->MyClass && (recvq.length() > this->MyClass->GetRecvqMax()))
 559         {
 560                 ServerInstance->Users->QuitUser(this, "RecvQ exceeded");
 561                 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());
 562                 return false;
 563         }
 564
 565         return true;
 566 }
 567
 568 bool User::BufferIsReady()
 569 {
 570         return (recvq.find('\n') != std::string::npos);
 571 }
 572
 573 void User::ClearBuffer()
 574 {
 575         recvq.clear();
 576 }
 577
 578 std::string User::GetBuffer()
 579 {
 580         try
 581         {
 582                 if (recvq.empty())
 583                         return "";
 584
 585                 /* Strip any leading \r or \n off the string.
 586                  * Usually there are only one or two of these,
 587                  * so its is computationally cheap to do.
 588                  */
 589                 std::string::iterator t = recvq.begin();
 590                 while (t != recvq.end() && (*t == '\r' || *t == '\n'))
 591                 {
 592                         recvq.erase(t);
 593                         t = recvq.begin();
 594                 }
 595
 596                 for (std::string::iterator x = recvq.begin(); x != recvq.end(); x++)
 597                 {
 598                         /* Find the first complete line, return it as the
 599                          * result, and leave the recvq as whats left
 600                          */
 601                         if (*x == '\n')
 602                         {
 603                                 std::string ret = std::string(recvq.begin(), x);
 604                                 recvq.erase(recvq.begin(), x + 1);
 605                                 return ret;
 606                         }
 607                 }
 608                 return "";
 609         }
 610
 611         catch (...)
 612         {
 613                 ServerInstance->Logs->Log("USERS", DEBUG,"Exception in User::GetBuffer()");
 614                 return "";
 615         }
 616 }
 617
 618 void User::AddWriteBuf(const std::string &data)
 619 {
 620         if (this->quitting)
 621                 return;
 622
 623         if (this->MyClass && (sendq.length() + data.length() > this->MyClass->GetSendqMax()))
 624         {
 625                 /*
 626                  * Fix by brain - Set the error text BEFORE calling, because
 627                  * if we dont it'll recursively  call here over and over again trying
 628                  * to repeatedly add the text to the sendq!
 629                  */
 630                 ServerInstance->Users->QuitUser(this, "SendQ exceeded");
 631                 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());
 632                 return;
 633         }
 634
 635         if (data.length() > MAXBUF - 2) /* MAXBUF has a value of 514, to account for line terminators */
 636                 sendq.append(data.substr(0,MAXBUF - 4)).append("\r\n"); /* MAXBUF-4 = 510 */
 637         else
 638                 sendq.append(data);
 639 }
 640
 641 // send AS MUCH OF THE USERS SENDQ as we are able to (might not be all of it)
 642 void User::FlushWriteBuf()
 643 {
 644         if (this->fd == FD_MAGIC_NUMBER)
 645         {
 646                 sendq.clear();
 647                 return;
 648         }
 649
 650         if ((sendq.length()) && (this->fd != FD_MAGIC_NUMBER))
 651         {
 652                 int old_sendq_length = sendq.length();
 653                 int n_sent = ServerInstance->SE->Send(this, this->sendq.data(), this->sendq.length(), 0);
 654
 655                 if (n_sent == -1)
 656                 {
 657                         if (errno == EAGAIN)
 658                         {
 659                                 /* The socket buffer is full. This isnt fatal,
 660                                  * try again later.
 661                                  */
 662                                 ServerInstance->SE->WantWrite(this);
 663                         }
 664                         else
 665                         {
 666                                 /* Fatal error, set write error and bail */
 667                                 ServerInstance->Users->QuitUser(this, errno ? strerror(errno) : "Write error");
 668                                 return;
 669                         }
 670                 }
 671                 else
 672                 {
 673                         /* advance the queue */
 674                         if (n_sent)
 675                                 this->sendq = this->sendq.substr(n_sent);
 676                         /* update the user's stats counters */
 677                         this->bytes_out += n_sent;
 678                         this->cmds_out++;
 679                         if (n_sent != old_sendq_length)
 680                                 this->ServerInstance->SE->WantWrite(this);
 681                 }
 682         }
 683
 684         /* note: NOT else if! */
 685         if (this->sendq.empty())
 686         {
 687                 FOREACH_MOD(I_OnBufferFlushed,OnBufferFlushed(this));
 688         }
 689 }
 690
 691 void User::Oper(const std::string &opertype, const std::string &opername)
 692 {
 693         char* mycmd;
 694         char* savept;
 695         char* savept2;
 696
 697         try
 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                 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());
 703                 this->oper.assign(opertype, 0, 512);
 704                 ServerInstance->Users->all_opers.push_back(this);
 705
 706                 opertype_t::iterator iter_opertype = ServerInstance->Config->opertypes.find(this->oper.c_str());
 707                 if (iter_opertype != ServerInstance->Config->opertypes.end())
 708                 {
 709
 710                         if (AllowedOperCommands)
 711                                 AllowedOperCommands->clear();
 712                         else
 713                                 AllowedOperCommands = new std::map<std::string, bool>;
 714
 715                         if (!AllowedChanModes)
 716                                 AllowedChanModes = new bool[64];
 717
 718                         if (!AllowedUserModes)
 719                                 AllowedUserModes = new bool[64];
 720
 721                         memset(AllowedUserModes, 0, 64);
 722                         memset(AllowedChanModes, 0, 64);
 723
 724                         char* Classes = strdup(iter_opertype->second);
 725                         char* myclass = strtok_r(Classes," ",&savept);
 726                         while (myclass)
 727                         {
 728                                 operclass_t::iterator iter_operclass = ServerInstance->Config->operclass.find(myclass);
 729                                 if (iter_operclass != ServerInstance->Config->operclass.end())
 730                                 {
 731                                         char* CommandList = strdup(iter_operclass->second.commandlist);
 732                                         mycmd = strtok_r(CommandList," ",&savept2);
 733                                         while (mycmd)
 734                                         {
 735                                                 this->AllowedOperCommands->insert(std::make_pair(mycmd, true));
 736                                                 mycmd = strtok_r(NULL," ",&savept2);
 737                                         }
 738                                         free(CommandList);
 739                                         this->AllowedUserModes['o' - 'A'] = true; // Call me paranoid if you want.
 740                                         for (unsigned char* c = (unsigned char*)iter_operclass->second.umodelist; *c; ++c)
 741                                         {
 742                                                 if (*c == '*')
 743                                                 {
 744                                                         memset(this->AllowedUserModes, (int)(true), 64);
 745                                                 }
 746                                                 else
 747                                                 {
 748                                                         this->AllowedUserModes[*c - 'A'] = true;
 749                                                 }
 750                                         }
 751                                         for (unsigned char* c = (unsigned char*)iter_operclass->second.cmodelist; *c; ++c)
 752                                         {
 753                                                 if (*c == '*')
 754                                                 {
 755                                                         memset(this->AllowedChanModes, (int)(true), 64);
 756                                                 }
 757                                                 else
 758                                                 {
 759                                                         this->AllowedChanModes[*c - 'A'] = true;
 760                                                 }
 761                                         }
 762                                 }
 763                                 myclass = strtok_r(NULL," ",&savept);
 764                         }
 765                         free(Classes);
 766                 }
 767
 768                 FOREACH_MOD(I_OnPostOper,OnPostOper(this, opertype, opername));
 769         }
 770
 771         catch (...)
 772         {
 773                 ServerInstance->Logs->Log("OPER", DEBUG,"Exception in User::Oper()");
 774         }
 775 }
 776
 777 void User::UnOper()
 778 {
 779         if (IS_OPER(this))
 780         {
 781                 /* Remove all oper only modes from the user when the deoper - Bug #466*/
 782                 std::string moderemove("-");
 783
 784                 for (unsigned char letter = 'A'; letter <= 'z'; letter++)
 785                 {
 786                         if (letter != 'o')
 787                         {
 788                                 ModeHandler* mh = ServerInstance->Modes->FindMode(letter, MODETYPE_USER);
 789                                 if (mh && mh->NeedsOper())
 790                                         moderemove += letter;
 791                         }
 792                 }
 793
 794                 std::vector<std::string> parameters;
 795                 parameters.push_back(this->nick);
 796                 parameters.push_back(moderemove);
 797
 798                 ServerInstance->Parser->CallHandler("MODE", parameters, this);
 799
 800                 /* unset their oper type (what IS_OPER checks), and remove +o */
 801                 this->oper.clear();
 802                 this->modes[UM_OPERATOR] = 0;
 803
 804                 /* remove the user from the oper list. Will remove multiple entries as a safeguard against bug #404 */
 805                 ServerInstance->Users->all_opers.remove(this);
 806
 807                 if (AllowedOperCommands)
 808                 {
 809                         delete AllowedOperCommands;
 810                         AllowedOperCommands = NULL;
 811                 }
 812                 if (AllowedUserModes)
 813                 {
 814                         delete[] AllowedUserModes;
 815                         AllowedUserModes = NULL;
 816                 }
 817                 if (AllowedChanModes)
 818                 {
 819                         delete[] AllowedChanModes;
 820                         AllowedChanModes = NULL;
 821                 }
 822
 823         }
 824 }
 825
 826 /* adds or updates an entry in the whowas list */
 827 void User::AddToWhoWas()
 828 {
 829         Command* whowas_command = ServerInstance->Parser->GetHandler("WHOWAS");
 830         if (whowas_command)
 831         {
 832                 std::deque<classbase*> params;
 833                 params.push_back(this);
 834                 whowas_command->HandleInternal(WHOWAS_ADD, params);
 835         }
 836 }
 837
 838 /*
 839  * Check class restrictions
 840  */
 841 void User::CheckClass()
 842 {
 843         ConnectClass* a = this->MyClass;
 844
 845         if ((!a) || (a->GetType() == CC_DENY))
 846         {
 847                 ServerInstance->Users->QuitUser(this, "Unauthorised connection");
 848                 return;
 849         }
 850         else if ((a->GetMaxLocal()) && (ServerInstance->Users->LocalCloneCount(this) > a->GetMaxLocal()))
 851         {
 852                 ServerInstance->Users->QuitUser(this, "No more connections allowed from your host via this connect class (local)");
 853                 ServerInstance->SNO->WriteToSnoMask('A', "WARNING: maximum LOCAL connections (%ld) exceeded for IP %s", a->GetMaxLocal(), this->GetIPString());
 854                 return;
 855         }
 856         else if ((a->GetMaxGlobal()) && (ServerInstance->Users->GlobalCloneCount(this) > a->GetMaxGlobal()))
 857         {
 858                 ServerInstance->Users->QuitUser(this, "No more connections allowed from your host via this connect class (global)");
 859                 ServerInstance->SNO->WriteToSnoMask('A', "WARNING: maximum GLOBAL connections (%ld) exceeded for IP %s", a->GetMaxGlobal(), this->GetIPString());
 860                 return;
 861         }
 862
 863         this->nping = ServerInstance->Time() + a->GetPingTime() + ServerInstance->Config->dns_timeout;
 864 }
 865
 866 bool User::CheckLines()
 867 {
 868         const char* check[] = { "G" , "K", NULL };
 869
 870         if (!this->exempt)
 871         {
 872                 for (int n = 0; check[n]; ++n)
 873                 {
 874                         XLine *r = ServerInstance->XLines->MatchesLine(check[n], this);
 875
 876                         if (r)
 877                         {
 878                                 r->Apply(this);
 879                                 return true;
 880                         }
 881                 }
 882         }
 883
 884         return false;
 885 }
 886
 887 void User::FullConnect()
 888 {
 889         ServerInstance->stats->statsConnects++;
 890         this->idle_lastmsg = ServerInstance->Time();
 891
 892         /*
 893          * You may be thinking "wtf, we checked this in User::AddClient!" - and yes, we did, BUT.
 894          * At the time AddClient is called, we don't have a resolved host, by here we probably do - which
 895          * may put the user into a totally seperate class with different restrictions! so we *must* check again.
 896          * Don't remove this! -- w00t
 897          */
 898         this->SetClass();
 899
 900         /* Check the password, if one is required by the user's connect class.
 901          * This CANNOT be in CheckClass(), because that is called prior to PASS as well!
 902          */
 903         if (this->MyClass && !this->MyClass->GetPass().empty() && !this->haspassed)
 904         {
 905                 ServerInstance->Users->QuitUser(this, "Invalid password");
 906                 return;
 907         }
 908
 909         if (this->CheckLines())
 910                 return;
 911
 912         this->WriteServ("NOTICE Auth :Welcome to \002%s\002!",ServerInstance->Config->Network);
 913         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());
 914         this->WriteNumeric(RPL_YOURHOSTIS, "%s :Your host is %s, running version InspIRCd-1.2",this->nick.c_str(),ServerInstance->Config->ServerName);
 915         this->WriteNumeric(RPL_SERVERCREATED, "%s :This server was created %s %s", this->nick.c_str(), __TIME__, __DATE__);
 916         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());
 917
 918         ServerInstance->Config->Send005(this);
 919         this->WriteNumeric(RPL_YOURUUID, "%s %s :your unique ID", this->nick.c_str(), this->uuid.c_str());
 920
 921
 922         this->ShowMOTD();
 923
 924         /* Now registered */
 925         if (ServerInstance->Users->unregistered_count)
 926                 ServerInstance->Users->unregistered_count--;
 927
 928         /* Trigger LUSERS output, give modules a chance too */
 929         int MOD_RESULT = 0;
 930         std::string command("LUSERS");
 931         std::vector<std::string> parameters;
 932         FOREACH_RESULT(I_OnPreCommand, OnPreCommand(command, parameters, this, true, "LUSERS"));
 933         if (!MOD_RESULT)
 934                 ServerInstance->CallCommandHandler(command, parameters, this);
 935
 936         /*
 937          * We don't set REG_ALL until triggering OnUserConnect, so some module events don't spew out stuff
 938          * for a user that doesn't exist yet.
 939          */
 940         FOREACH_MOD(I_OnUserConnect,OnUserConnect(this));
 941
 942         this->registered = REG_ALL;
 943
 944         ServerInstance->PI->Introduce(this);
 945
 946         FOREACH_MOD(I_OnPostConnect,OnPostConnect(this));
 947
 948         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());
 949         ServerInstance->Logs->Log("BANCACHE", DEBUG, "BanCache: Adding NEGATIVE hit for %s", this->GetIPString());
 950         ServerInstance->BanCache->AddHit(this->GetIPString(), "", "");
 951 }
 952
 953 /** User::UpdateNick()
 954  * re-allocates a nick in the user_hash after they change nicknames,
 955  * returns a pointer to the new user as it may have moved
 956  */
 957 User* User::UpdateNickHash(const char* New)
 958 {
 959         //user_hash::iterator newnick;
 960         user_hash::iterator oldnick = ServerInstance->Users->clientlist->find(this->nick);
 961
 962         if (!irc::string(this->nick.c_str()).compare(New))
 963                 return oldnick->second;
 964
 965         if (oldnick == ServerInstance->Users->clientlist->end())
 966                 return NULL; /* doesnt exist */
 967
 968         User* olduser = oldnick->second;
 969         (*(ServerInstance->Users->clientlist))[New] = olduser;
 970         ServerInstance->Users->clientlist->erase(oldnick);
 971         return olduser;
 972 }
 973
 974 void User::InvalidateCache()
 975 {
 976         /* Invalidate cache */
 977         cached_fullhost.clear();
 978         cached_hostip.clear();
 979         cached_makehost.clear();
 980         cached_fullrealhost.clear();
 981 }
 982
 983 bool User::ForceNickChange(const char* newnick)
 984 {
 985         int MOD_RESULT = 0;
 986
 987         this->InvalidateCache();
 988
 989         FOREACH_RESULT(I_OnUserPreNick,OnUserPreNick(this, newnick));
 990
 991         if (MOD_RESULT)
 992         {
 993                 ServerInstance->stats->statsCollisions++;
 994                 return false;
 995         }
 996
 997         std::deque<classbase*> dummy;
 998         Command* nickhandler = ServerInstance->Parser->GetHandler("NICK");
 999         if (nickhandler) // wtfbbq, when would this not be here
1000         {
1001                 std::vector<std::string> parameters;
1002                 nickhandler->HandleInternal(1, dummy);
1003                 parameters.push_back(newnick);
1004                 bool result = (ServerInstance->Parser->CallHandler("NICK", parameters, this) == CMD_SUCCESS);
1005                 nickhandler->HandleInternal(0, dummy);
1006                 return result;
1007         }
1008
1009         // Unreachable, we hope
1010         return false;
1011 }
1012
1013 void User::SetSockAddr(int protocol_family, const char* sip, int port)
1014 {
1015         this->cachedip = "";
1016
1017         switch (protocol_family)
1018         {
1019 #ifdef SUPPORT_IP6LINKS
1020                 case AF_INET6:
1021                 {
1022                         sockaddr_in6* sin = new sockaddr_in6;
1023                         sin->sin6_family = AF_INET6;
1024                         sin->sin6_port = port;
1025                         inet_pton(AF_INET6, sip, &sin->sin6_addr);
1026                         this->ip = (sockaddr*)sin;
1027                 }
1028                 break;
1029 #endif
1030                 case AF_INET:
1031                 {
1032                         sockaddr_in* sin = new sockaddr_in;
1033                         sin->sin_family = AF_INET;
1034                         sin->sin_port = port;
1035                         inet_pton(AF_INET, sip, &sin->sin_addr);
1036                         this->ip = (sockaddr*)sin;
1037                 }
1038                 break;
1039                 default:
1040                         ServerInstance->Logs->Log("USERS",DEBUG,"Uh oh, I dont know protocol %d to be set on '%s'!", protocol_family, this->nick.c_str());
1041                 break;
1042         }
1043 }
1044
1045 int User::GetPort()
1046 {
1047         if (this->ip == NULL)
1048                 return 0;
1049
1050         switch (this->GetProtocolFamily())
1051         {
1052 #ifdef SUPPORT_IP6LINKS
1053                 case AF_INET6:
1054                 {
1055                         sockaddr_in6* sin = (sockaddr_in6*)this->ip;
1056                         return sin->sin6_port;
1057                 }
1058                 break;
1059 #endif
1060                 case AF_INET:
1061                 {
1062                         sockaddr_in* sin = (sockaddr_in*)this->ip;
1063                         return sin->sin_port;
1064                 }
1065                 break;
1066                 default:
1067                 break;
1068         }
1069         return 0;
1070 }
1071
1072 int User::GetProtocolFamily()
1073 {
1074         if (this->ip == NULL)
1075                 return 0;
1076
1077         sockaddr_in* sin = (sockaddr_in*)this->ip;
1078         return sin->sin_family;
1079 }
1080
1081 const char* User::GetCIDRMask(int range)
1082 {
1083         static char buf[44];
1084
1085         if (this->ip == NULL)
1086                 return "";
1087
1088         if (range < 0)
1089                 throw "Negative range, sorry, no.";
1090
1091         /*
1092          * Original code written by Oliver Lupton (Om).
1093          * Integrated by me. Thanks. :) -- w00t
1094          */
1095         switch (this->GetProtocolFamily())
1096         {
1097 #ifdef SUPPORT_IP6LINKS
1098                 case AF_INET6:
1099                 {
1100                         /* unsigned char s6_addr[16]; */
1101                         struct in6_addr v6;
1102                         sockaddr_in6* sin;
1103                         int i, bytestozero, extrabits;
1104                         char buffer[40];
1105
1106                         if(range > 128)
1107                                 throw "CIDR mask width greater than address width (IPv6, 128 bit)";
1108
1109                         /* Access the user's IP structure directly */
1110                         sin = (sockaddr_in6*)this->ip;
1111
1112                         /* To create the CIDR mask we want to set all the bits after 'range' bits of the address
1113                          * to zero. This means the last (128 - range) bits of the address must be set to zero.
1114                          * Hence this number divided by 8 is the number of whole bytes from the end of the address
1115                          * which must be set to zero.
1116                          */
1117                         bytestozero = (128 - range) / 8;
1118
1119                         /* Some of the least significant bits of the next most significant byte may also have to
1120                          * be zeroed. The number of bits is the remainder of the above division.
1121                          */
1122                         extrabits = (128 - range) % 8;
1123
1124                         /* Populate our working struct with the parts of the user's IP which are required in the
1125                          * final CIDR mask. Set all the subsequent bytes to zero.
1126                          * (16 - bytestozero) is the number of bytes which must be populated with actual IP data.
1127                          */
1128                         for(i = 0; i < (16 - bytestozero); i++)
1129                         {
1130                                 v6.s6_addr[i] = sin->sin6_addr.s6_addr[i];
1131                         }
1132
1133                         /* And zero all the remaining bytes in the IP. */
1134                         for(; i < 16; i++)
1135                         {
1136                                 v6.s6_addr[i] = 0;
1137                         }
1138
1139                         /* And finally, zero the extra bits required. */
1140                         v6.s6_addr[15 - bytestozero] = (v6.s6_addr[15 - bytestozero] >> extrabits) << extrabits;
1141
1142                         snprintf(buf, 44, "%s/%d", inet_ntop(AF_INET6, &v6, buffer, 40), range);
1143                         return buf;
1144                 }
1145                 break;
1146 #endif
1147                 case AF_INET:
1148                 {
1149                         struct in_addr v4;
1150                         sockaddr_in* sin;
1151                         char buffer[16];
1152
1153                         if (range > 32)
1154                                 throw "CIDR mask width greater than address width (IPv4, 32 bit)";
1155
1156                         /* Users already have a sockaddr* pointer (User::ip) which contains either a v4 or v6 structure */
1157                         sin = (sockaddr_in*)this->ip;
1158                         v4.s_addr = sin->sin_addr.s_addr;
1159
1160                         /* To create the CIDR mask we want to set all the bits after 'range' bits of the address
1161                          * to zero. This means the last (32 - range) bits of the address must be set to zero.
1162                          * This is done by shifting the value right and then back left by (32 - range) bits.
1163                          */
1164                         if(range > 0)
1165                         {
1166                                 v4.s_addr = ntohl(v4.s_addr);
1167                                 v4.s_addr = (v4.s_addr >> (32 - range)) << (32 - range);
1168                                 v4.s_addr = htonl(v4.s_addr);
1169                         }
1170                         else
1171                         {
1172                                 /* a range of zero would cause a 32 bit value to be shifted by 32 bits.
1173                                  * this has undefined behaviour, but for CIDR purposes the resulting mask
1174                                  * from a.b.c.d/0 is 0.0.0.0/0
1175                                  */
1176                                 v4.s_addr = 0;
1177                         }
1178
1179                         snprintf(buf, 44, "%s/%d", inet_ntop(AF_INET, &v4, buffer, 16), range);
1180                         return buf;
1181                 }
1182                 break;
1183         }
1184
1185         return ""; // unused, but oh well
1186 }
1187
1188 const char* User::GetIPString(bool translate4in6)
1189 {
1190         static char buf[40];
1191
1192         if (this->ip == NULL)
1193                 return "";
1194
1195         if (!this->cachedip.empty())
1196                 return this->cachedip.c_str();
1197
1198         switch (this->GetProtocolFamily())
1199         {
1200 #ifdef SUPPORT_IP6LINKS
1201                 case AF_INET6:
1202                 {
1203                         static char temp[1024];
1204
1205                         sockaddr_in6* sin = (sockaddr_in6*)this->ip;
1206                         inet_ntop(sin->sin6_family, &sin->sin6_addr, buf, sizeof(buf));
1207                         /* IP addresses starting with a : on irc are a Bad Thing (tm) */
1208                         if (*buf == ':')
1209                         {
1210                                 strlcpy(&temp[1], buf, sizeof(temp) - 1);
1211                                 *temp = '0';
1212                                 if (translate4in6 && !strncmp(temp, "0::ffff:", 8))
1213                                 {
1214                                         this->cachedip = temp + 8;
1215                                         return temp + 8;
1216                                 }
1217
1218                                 this->cachedip = temp;
1219                                 return temp;
1220                         }
1221
1222                         this->cachedip = buf;
1223                         return buf;
1224                 }
1225                 break;
1226 #endif
1227                 case AF_INET:
1228                 {
1229                         sockaddr_in* sin = (sockaddr_in*)this->ip;
1230                         inet_ntop(sin->sin_family, &sin->sin_addr, buf, sizeof(buf));
1231                         this->cachedip = buf;
1232                         return buf;
1233                 }
1234                 break;
1235                 default:
1236                 break;
1237         }
1238
1239         // Unreachable, probably
1240         return "";
1241 }
1242
1243 /** NOTE: We cannot pass a const reference to this method.
1244  * The string is changed by the workings of the method,
1245  * so that if we pass const ref, we end up copying it to
1246  * something we can change anyway. Makes sense to just let
1247  * the compiler do that copy for us.
1248  */
1249 void User::Write(std::string text)
1250 {
1251         if (!ServerInstance->SE->BoundsCheckFd(this))
1252                 return;
1253
1254         try
1255         {
1256                 ServerInstance->Logs->Log("USEROUTPUT", DEBUG,"C[%d] O %s", this->GetFd(), text.c_str());
1257                 text.append("\r\n");
1258         }
1259         catch (...)
1260         {
1261                 ServerInstance->Logs->Log("USEROUTPUT", DEBUG,"Exception in User::Write() std::string::append");
1262                 return;
1263         }
1264
1265         if (this->io)
1266         {
1267                 /* XXX: The lack of buffering here is NOT a bug, modules implementing this interface have to
1268                  * implement their own buffering mechanisms
1269                  */
1270                 try
1271                 {
1272                         this->io->OnRawSocketWrite(this->fd, text.data(), text.length());
1273                 }
1274                 catch (CoreException& modexcept)
1275                 {
1276                         ServerInstance->Logs->Log("USEROUTPUT", DEBUG, "%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
1277                 }
1278         }
1279         else
1280         {
1281                 this->AddWriteBuf(text);
1282         }
1283         ServerInstance->stats->statsSent += text.length();
1284         this->ServerInstance->SE->WantWrite(this);
1285 }
1286
1287 /** Write()
1288  */
1289 void User::Write(const char *text, ...)
1290 {
1291         va_list argsPtr;
1292         char textbuffer[MAXBUF];
1293
1294         va_start(argsPtr, text);
1295         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1296         va_end(argsPtr);
1297
1298         this->Write(std::string(textbuffer));
1299 }
1300
1301 void User::WriteServ(const std::string& text)
1302 {
1303         char textbuffer[MAXBUF];
1304
1305         snprintf(textbuffer,MAXBUF,":%s %s",ServerInstance->Config->ServerName,text.c_str());
1306         this->Write(std::string(textbuffer));
1307 }
1308
1309 /** WriteServ()
1310  *  Same as Write(), except `text' is prefixed with `:server.name '.
1311  */
1312 void User::WriteServ(const char* text, ...)
1313 {
1314         va_list argsPtr;
1315         char textbuffer[MAXBUF];
1316
1317         va_start(argsPtr, text);
1318         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1319         va_end(argsPtr);
1320
1321         this->WriteServ(std::string(textbuffer));
1322 }
1323
1324
1325 void User::WriteNumeric(unsigned int numeric, const char* text, ...)
1326 {
1327         va_list argsPtr;
1328         char textbuffer[MAXBUF];
1329
1330         va_start(argsPtr, text);
1331         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1332         va_end(argsPtr);
1333
1334         this->WriteNumeric(numeric, std::string(textbuffer));
1335 }
1336
1337 void User::WriteNumeric(unsigned int numeric, const std::string &text)
1338 {
1339         char textbuffer[MAXBUF];
1340         int MOD_RESULT = 0;
1341
1342         FOREACH_RESULT(I_OnNumeric, OnNumeric(this, numeric, text));
1343
1344         if (MOD_RESULT)
1345                 return;
1346
1347         snprintf(textbuffer,MAXBUF,":%s %03u %s",ServerInstance->Config->ServerName, numeric, text.c_str());
1348         this->Write(std::string(textbuffer));
1349 }
1350
1351 void User::WriteFrom(User *user, const std::string &text)
1352 {
1353         char tb[MAXBUF];
1354
1355         snprintf(tb,MAXBUF,":%s %s",user->GetFullHost().c_str(),text.c_str());
1356
1357         this->Write(std::string(tb));
1358 }
1359
1360
1361 /* write text from an originating user to originating user */
1362
1363 void User::WriteFrom(User *user, const char* text, ...)
1364 {
1365         va_list argsPtr;
1366         char textbuffer[MAXBUF];
1367
1368         va_start(argsPtr, text);
1369         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1370         va_end(argsPtr);
1371
1372         this->WriteFrom(user, std::string(textbuffer));
1373 }
1374
1375
1376 /* write text to an destination user from a source user (e.g. user privmsg) */
1377
1378 void User::WriteTo(User *dest, const char *data, ...)
1379 {
1380         char textbuffer[MAXBUF];
1381         va_list argsPtr;
1382
1383         va_start(argsPtr, data);
1384         vsnprintf(textbuffer, MAXBUF, data, argsPtr);
1385         va_end(argsPtr);
1386
1387         this->WriteTo(dest, std::string(textbuffer));
1388 }
1389
1390 void User::WriteTo(User *dest, const std::string &data)
1391 {
1392         dest->WriteFrom(this, data);
1393 }
1394
1395
1396 void User::WriteCommon(const char* text, ...)
1397 {
1398         char textbuffer[MAXBUF];
1399         va_list argsPtr;
1400
1401         if (this->registered != REG_ALL)
1402                 return;
1403
1404         va_start(argsPtr, text);
1405         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1406         va_end(argsPtr);
1407
1408         this->WriteCommon(std::string(textbuffer));
1409 }
1410
1411 void User::WriteCommon(const std::string &text)
1412 {
1413         bool sent_to_at_least_one = false;
1414         char tb[MAXBUF];
1415
1416         if (this->registered != REG_ALL)
1417                 return;
1418
1419         uniq_id++;
1420
1421         if (!already_sent)
1422                 InitializeAlreadySent(ServerInstance->SE);
1423
1424         /* We dont want to be doing this n times, just once */
1425         snprintf(tb,MAXBUF,":%s %s",this->GetFullHost().c_str(),text.c_str());
1426         std::string out = tb;
1427
1428         for (UCListIter v = this->chans.begin(); v != this->chans.end(); v++)
1429         {
1430                 CUList* ulist = v->first->GetUsers();
1431                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1432                 {
1433                         if ((IS_LOCAL(i->first)) && (already_sent[i->first->fd] != uniq_id))
1434                         {
1435                                 already_sent[i->first->fd] = uniq_id;
1436                                 i->first->Write(out);
1437                                 sent_to_at_least_one = true;
1438                         }
1439                 }
1440         }
1441
1442         /*
1443          * if the user was not in any channels, no users will receive the text. Make sure the user
1444          * receives their OWN message for WriteCommon
1445          */
1446         if (!sent_to_at_least_one)
1447         {
1448                 this->Write(std::string(tb));
1449         }
1450 }
1451
1452
1453 /* write a formatted string to all users who share at least one common
1454  * channel, NOT including the source user e.g. for use in QUIT
1455  */
1456
1457 void User::WriteCommonExcept(const char* text, ...)
1458 {
1459         char textbuffer[MAXBUF];
1460         va_list argsPtr;
1461
1462         va_start(argsPtr, text);
1463         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1464         va_end(argsPtr);
1465
1466         this->WriteCommonExcept(std::string(textbuffer));
1467 }
1468
1469 void User::WriteCommonQuit(const std::string &normal_text, const std::string &oper_text)
1470 {
1471         char tb1[MAXBUF];
1472         char tb2[MAXBUF];
1473
1474         if (this->registered != REG_ALL)
1475                 return;
1476
1477         uniq_id++;
1478
1479         if (!already_sent)
1480                 InitializeAlreadySent(ServerInstance->SE);
1481
1482         snprintf(tb1,MAXBUF,":%s QUIT :%s",this->GetFullHost().c_str(),normal_text.c_str());
1483         snprintf(tb2,MAXBUF,":%s QUIT :%s",this->GetFullHost().c_str(),oper_text.c_str());
1484         std::string out1 = tb1;
1485         std::string out2 = tb2;
1486
1487         for (UCListIter v = this->chans.begin(); v != this->chans.end(); v++)
1488         {
1489                 CUList *ulist = v->first->GetUsers();
1490                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1491                 {
1492                         if (this != i->first)
1493                         {
1494                                 if ((IS_LOCAL(i->first)) && (already_sent[i->first->fd] != uniq_id))
1495                                 {
1496                                         already_sent[i->first->fd] = uniq_id;
1497                                         i->first->Write(IS_OPER(i->first) ? out2 : out1);
1498                                 }
1499                         }
1500                 }
1501         }
1502 }
1503
1504 void User::WriteCommonExcept(const std::string &text)
1505 {
1506         char tb1[MAXBUF];
1507         std::string out1;
1508
1509         if (this->registered != REG_ALL)
1510                 return;
1511
1512         uniq_id++;
1513
1514         if (!already_sent)
1515                 InitializeAlreadySent(ServerInstance->SE);
1516
1517         snprintf(tb1,MAXBUF,":%s %s",this->GetFullHost().c_str(),text.c_str());
1518         out1 = tb1;
1519
1520         for (UCListIter v = this->chans.begin(); v != this->chans.end(); v++)
1521         {
1522                 CUList *ulist = v->first->GetUsers();
1523                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1524                 {
1525                         if (this != i->first)
1526                         {
1527                                 if ((IS_LOCAL(i->first)) && (already_sent[i->first->fd] != uniq_id))
1528                                 {
1529                                         already_sent[i->first->fd] = uniq_id;
1530                                         i->first->Write(out1);
1531                                 }
1532                         }
1533                 }
1534         }
1535
1536 }
1537
1538 void User::WriteWallOps(const std::string &text)
1539 {
1540         if (!IS_LOCAL(this))
1541                 return;
1542
1543         std::string wallop("WALLOPS :");
1544         wallop.append(text);
1545
1546         for (std::vector<User*>::const_iterator i = ServerInstance->Users->local_users.begin(); i != ServerInstance->Users->local_users.end(); i++)
1547         {
1548                 User* t = *i;
1549                 if (t->IsModeSet('w'))
1550                         this->WriteTo(t,wallop);
1551         }
1552 }
1553
1554 void User::WriteWallOps(const char* text, ...)
1555 {
1556         if (!IS_LOCAL(this))
1557                 return;
1558
1559         char textbuffer[MAXBUF];
1560         va_list argsPtr;
1561
1562         va_start(argsPtr, text);
1563         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1564         va_end(argsPtr);
1565
1566         this->WriteWallOps(std::string(textbuffer));
1567 }
1568
1569 /* return 0 or 1 depending if users u and u2 share one or more common channels
1570  * (used by QUIT, NICK etc which arent channel specific notices)
1571  *
1572  * The old algorithm in 1.0 for this was relatively inefficient, iterating over
1573  * the first users channels then the second users channels within the outer loop,
1574  * therefore it was a maximum of x*y iterations (upon returning 0 and checking
1575  * all possible iterations). However this new function instead checks against the
1576  * channel's userlist in the inner loop which is a std::map<User*,User*>
1577  * and saves us time as we already know what pointer value we are after.
1578  * Don't quote me on the maths as i am not a mathematician or computer scientist,
1579  * but i believe this algorithm is now x+(log y) maximum iterations instead.
1580  */
1581 bool User::SharesChannelWith(User *other)
1582 {
1583         if ((!other) || (this->registered != REG_ALL) || (other->registered != REG_ALL))
1584                 return false;
1585
1586         /* Outer loop */
1587         for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1588         {
1589                 /* Eliminate the inner loop (which used to be ~equal in size to the outer loop)
1590                  * by replacing it with a map::find which *should* be more efficient
1591                  */
1592                 if (i->first->HasUser(other))
1593                         return true;
1594         }
1595         return false;
1596 }
1597
1598 bool User::ChangeName(const char* gecos)
1599 {
1600         if (!this->fullname.compare(gecos))
1601                 return true;
1602
1603         if (IS_LOCAL(this))
1604         {
1605                 int MOD_RESULT = 0;
1606                 FOREACH_RESULT(I_OnChangeLocalUserGECOS,OnChangeLocalUserGECOS(this,gecos));
1607                 if (MOD_RESULT)
1608                         return false;
1609                 FOREACH_MOD(I_OnChangeName,OnChangeName(this,gecos));
1610         }
1611         this->fullname.assign(gecos, 0, ServerInstance->Config->Limits.MaxGecos);
1612
1613         return true;
1614 }
1615
1616 bool User::ChangeDisplayedHost(const char* shost)
1617 {
1618         if (dhost == shost)
1619                 return true;
1620
1621         if (IS_LOCAL(this))
1622         {
1623                 int MOD_RESULT = 0;
1624                 FOREACH_RESULT(I_OnChangeLocalUserHost,OnChangeLocalUserHost(this,shost));
1625                 if (MOD_RESULT)
1626                         return false;
1627                 FOREACH_MOD(I_OnChangeHost,OnChangeHost(this,shost));
1628         }
1629
1630         if (this->ServerInstance->Config->CycleHosts)
1631                 this->WriteCommonExcept("QUIT :Changing hosts");
1632
1633         /* Fix by Om: User::dhost is 65 long, this was truncating some long hosts */
1634         this->dhost.assign(shost, 0, 64);
1635
1636         this->InvalidateCache();
1637
1638         if (this->ServerInstance->Config->CycleHosts)
1639         {
1640                 for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1641                 {
1642                         i->first->WriteAllExceptSender(this, false, 0, "JOIN %s", i->first->name.c_str());
1643                         std::string n = this->ServerInstance->Modes->ModeString(this, i->first);
1644                         if (n.length() > 0)
1645                                 i->first->WriteAllExceptSender(this, true, 0, "MODE %s +%s", i->first->name.c_str(), n.c_str());
1646                 }
1647         }
1648
1649         if (IS_LOCAL(this))
1650                 this->WriteNumeric(RPL_YOURDISPLAYEDHOST, "%s %s :is now your displayed host",this->nick.c_str(),this->dhost.c_str());
1651
1652         return true;
1653 }
1654
1655 bool User::ChangeIdent(const char* newident)
1656 {
1657         if (!this->ident.compare(newident))
1658                 return true;
1659
1660         if (this->ServerInstance->Config->CycleHosts)
1661                 this->WriteCommonExcept("%s","QUIT :Changing ident");
1662
1663         this->ident.assign(newident, 0, ServerInstance->Config->Limits.IdentMax + 1);
1664
1665         this->InvalidateCache();
1666
1667         if (this->ServerInstance->Config->CycleHosts)
1668         {
1669                 for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1670                 {
1671                         i->first->WriteAllExceptSender(this, false, 0, "JOIN %s", i->first->name.c_str());
1672                         std::string n = this->ServerInstance->Modes->ModeString(this, i->first);
1673                         if (n.length() > 0)
1674                                 i->first->WriteAllExceptSender(this, true, 0, "MODE %s +%s", i->first->name.c_str(), n.c_str());
1675                 }
1676         }
1677
1678         return true;
1679 }
1680
1681 void User::SendAll(const char* command, const char* text, ...)
1682 {
1683         char textbuffer[MAXBUF];
1684         char formatbuffer[MAXBUF];
1685         va_list argsPtr;
1686
1687         va_start(argsPtr, text);
1688         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1689         va_end(argsPtr);
1690
1691         snprintf(formatbuffer,MAXBUF,":%s %s $* :%s", this->GetFullHost().c_str(), command, textbuffer);
1692         std::string fmt = formatbuffer;
1693
1694         for (std::vector<User*>::const_iterator i = ServerInstance->Users->local_users.begin(); i != ServerInstance->Users->local_users.end(); i++)
1695         {
1696                 (*i)->Write(fmt);
1697         }
1698 }
1699
1700
1701 std::string User::ChannelList(User* source)
1702 {
1703         std::string list;
1704
1705         for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1706         {
1707                 /* If the target is the same as the sender, let them see all their channels.
1708                  * If the channel is NOT private/secret OR the user shares a common channel
1709                  * If the user is an oper, and the <options:operspywhois> option is set.
1710                  */
1711                 if ((source == this) || (IS_OPER(source) && ServerInstance->Config->OperSpyWhois) || (((!i->first->IsModeSet('p')) && (!i->first->IsModeSet('s'))) || (i->first->HasUser(source))))
1712                 {
1713                         list.append(i->first->GetPrefixChar(this)).append(i->first->name).append(" ");
1714                 }
1715         }
1716
1717         return list;
1718 }
1719
1720 void User::SplitChanList(User* dest, const std::string &cl)
1721 {
1722         std::string line;
1723         std::ostringstream prefix;
1724         std::string::size_type start, pos, length;
1725
1726         prefix << this->nick << " " << dest->nick << " :";
1727         line = prefix.str();
1728         int namelen = strlen(ServerInstance->Config->ServerName) + 6;
1729
1730         for (start = 0; (pos = cl.find(' ', start)) != std::string::npos; start = pos+1)
1731         {
1732                 length = (pos == std::string::npos) ? cl.length() : pos;
1733
1734                 if (line.length() + namelen + length - start > 510)
1735                 {
1736                         ServerInstance->SendWhoisLine(this, dest, 319, "%s", line.c_str());
1737                         line = prefix.str();
1738                 }
1739
1740                 if(pos == std::string::npos)
1741                 {
1742                         line.append(cl.substr(start, length - start));
1743                         break;
1744                 }
1745                 else
1746                 {
1747                         line.append(cl.substr(start, length - start + 1));
1748                 }
1749         }
1750
1751         if (line.length())
1752         {
1753                 ServerInstance->SendWhoisLine(this, dest, 319, "%s", line.c_str());
1754         }
1755 }
1756
1757 /*
1758  * Sets a user's connection class.
1759  * If the class name is provided, it will be used. Otherwise, the class will be guessed using host/ip/ident/etc.
1760  * NOTE: If the <ALLOW> or <DENY> tag specifies an ip, and this user resolves,
1761  * then their ip will be taken as 'priority' anyway, so for example,
1762  * <connect allow="127.0.0.1"> will match joe!bloggs@localhost
1763  */
1764 ConnectClass* User::SetClass(const std::string &explicit_name)
1765 {
1766         ConnectClass *found = NULL;
1767
1768         if (!IS_LOCAL(this))
1769                 return NULL;
1770
1771         ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Setting connect class for UID %s", this->uuid.c_str());
1772
1773         if (!explicit_name.empty())
1774         {
1775                 for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++)
1776                 {
1777                         ConnectClass* c = *i;
1778
1779                         if (c->GetDisabled())
1780                                 continue; // can't possibly match, removed from conf
1781
1782                         if (explicit_name == c->GetName())
1783                         {
1784                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Explicitly set to %s", explicit_name.c_str());
1785                                 found = c;
1786                         }
1787                 }
1788         }
1789         else
1790         {
1791                 for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++)
1792                 {
1793                         ConnectClass* c = *i;
1794
1795                         if (c->GetType() == CC_ALLOW)
1796                         {
1797                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "ALLOW %s %d %s", c->GetHost().c_str(), c->GetPort(), c->GetName().c_str());
1798                         }
1799                         else
1800                         {
1801                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "DENY %s %d %s", c->GetHost().c_str(), c->GetPort(), c->GetName().c_str());
1802                         }
1803
1804                         /* if it's disabled, we can't match this one. */
1805                         if (c->GetDisabled())
1806                         {
1807                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Class disabled");
1808                                 continue;
1809                         }
1810
1811                         /* check if host matches.. */
1812                         if (((!match(this->GetIPString(),c->GetHost(),true)) && (!match(this->host,c->GetHost()))))
1813                         {
1814                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "No host match (for %s)", c->GetHost().c_str());
1815                                 continue;
1816                         }
1817
1818                         /*
1819                          * deny change if change will take class over the limit check it HERE, not after we found a matching class,
1820                          * because we should attempt to find another class if this one doesn't match us. -- w00t
1821                          */
1822                         if (c->limit && (c->RefCount + 1 >= c->limit))
1823                         {
1824                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "OOPS: Connect class limit (%lu) hit, denying", c->limit);
1825                                 continue;
1826                         }
1827
1828                         /* if it requires a port ... */
1829                         if (c->GetPort())
1830                         {
1831                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Requires port (%d)", c->GetPort());
1832
1833                                 /* and our port doesn't match, fail. */
1834                                 if (this->GetPort() != c->GetPort())
1835                                 {
1836                                         ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Port match failed (%d)", this->GetPort());
1837                                         continue;
1838                                 }
1839                         }
1840
1841                         /* we stop at the first class that meets ALL critera. */
1842                         found = c;
1843                         break;
1844                 }
1845         }
1846
1847         /*
1848          * Okay, assuming we found a class that matches.. switch us into that class, keeping refcounts up to date.
1849          */
1850         if (found)
1851         {
1852                 /* only fiddle with refcounts if they are already in a class .. */
1853                 if (this->MyClass)
1854                 {
1855                         if (found == this->MyClass) // no point changing this shit :P
1856                                 return this->MyClass;
1857                         this->MyClass->RefCount--;
1858                         ServerInstance->Logs->Log("USERS", DEBUG, "Untying user from connect class -- refcount: %lu", this->MyClass->RefCount);
1859                 }
1860
1861                 this->MyClass = found;
1862                 this->MyClass->RefCount++;
1863                 ServerInstance->Logs->Log("USERS", DEBUG, "User tied to new class -- connect refcount now: %lu", this->MyClass->RefCount);
1864         }
1865
1866         return this->MyClass;
1867 }
1868
1869 /* looks up a users password for their connection class (<ALLOW>/<DENY> tags)
1870  * NOTE: If the <ALLOW> or <DENY> tag specifies an ip, and this user resolves,
1871  * then their ip will be taken as 'priority' anyway, so for example,
1872  * <connect allow="127.0.0.1"> will match joe!bloggs@localhost
1873  */
1874 ConnectClass* User::GetClass()
1875 {
1876         return this->MyClass;
1877 }
1878
1879 void User::PurgeEmptyChannels()
1880 {
1881         std::vector<Channel*> to_delete;
1882
1883         // firstly decrement the count on each channel
1884         for (UCListIter f = this->chans.begin(); f != this->chans.end(); f++)
1885         {
1886                 f->first->RemoveAllPrefixes(this);
1887                 if (f->first->DelUser(this) == 0)
1888                 {
1889                         /* No users left in here, mark it for deletion */
1890                         try
1891                         {
1892                                 to_delete.push_back(f->first);
1893                         }
1894                         catch (...)
1895                         {
1896                                 ServerInstance->Logs->Log("USERS", DEBUG,"Exception in User::PurgeEmptyChannels to_delete.push_back()");
1897                         }
1898                 }
1899         }
1900
1901         for (std::vector<Channel*>::iterator n = to_delete.begin(); n != to_delete.end(); n++)
1902         {
1903                 Channel* thischan = *n;
1904                 chan_hash::iterator i2 = ServerInstance->chanlist->find(thischan->name);
1905                 if (i2 != ServerInstance->chanlist->end())
1906                 {
1907                         FOREACH_MOD(I_OnChannelDelete,OnChannelDelete(i2->second));
1908                         delete i2->second;
1909                         ServerInstance->chanlist->erase(i2);
1910                         this->chans.erase(*n);
1911                 }
1912         }
1913
1914         this->UnOper();
1915 }
1916
1917 void User::ShowMOTD()
1918 {
1919         if (!ServerInstance->Config->MOTD.size())
1920         {
1921                 this->WriteNumeric(ERR_NOMOTD, "%s :Message of the day file is missing.",this->nick.c_str());
1922                 return;
1923         }
1924         this->WriteNumeric(RPL_MOTDSTART, "%s :%s message of the day", this->nick.c_str(), ServerInstance->Config->ServerName);
1925
1926         for (file_cache::iterator i = ServerInstance->Config->MOTD.begin(); i != ServerInstance->Config->MOTD.end(); i++)
1927                 this->WriteNumeric(RPL_MOTD, "%s :- %s",this->nick.c_str(),i->c_str());
1928
1929         this->WriteNumeric(RPL_ENDOFMOTD, "%s :End of message of the day.", this->nick.c_str());
1930 }
1931
1932 void User::ShowRULES()
1933 {
1934         if (!ServerInstance->Config->RULES.size())
1935         {
1936                 this->WriteNumeric(ERR_NORULES, "%s :RULES File is missing",this->nick.c_str());
1937                 return;
1938         }
1939
1940         this->WriteNumeric(RPL_RULESTART, "%s :- %s Server Rules -",this->nick.c_str(),ServerInstance->Config->ServerName);
1941
1942         for (file_cache::iterator i = ServerInstance->Config->RULES.begin(); i != ServerInstance->Config->RULES.end(); i++)
1943                 this->WriteNumeric(RPL_RULES, "%s :- %s",this->nick.c_str(),i->c_str());
1944
1945         this->WriteNumeric(RPL_RULESEND, "%s :End of RULES command.",this->nick.c_str());
1946 }
1947
1948 void User::HandleEvent(EventType et, int errornum)
1949 {
1950         if (this->quitting) // drop everything, user is due to be quit
1951                 return;
1952
1953         switch (et)
1954         {
1955                 case EVENT_READ:
1956                         ServerInstance->ProcessUser(this);
1957                 break;
1958                 case EVENT_WRITE:
1959                         this->FlushWriteBuf();
1960                 break;
1961                 case EVENT_ERROR:
1962                         ServerInstance->Users->QuitUser(this, errornum ? strerror(errornum) : "Client closed the connection");
1963                 break;
1964         }
1965 }
1966
1967 void User::SetOperQuit(const std::string &oquit)
1968 {
1969         operquitmsg = oquit;
1970 }
1971
1972 const std::string& User::GetOperQuit()
1973 {
1974         return operquitmsg;
1975 }
1976
1977 void User::IncreasePenalty(int increase)
1978 {
1979         this->Penalty += increase;
1980 }
1981
1982 void User::DecreasePenalty(int decrease)
1983 {
1984         this->Penalty -= decrease;
1985 }
1986
1987 VisData::VisData()
1988 {
1989 }
1990
1991 VisData::~VisData()
1992 {
1993 }
1994
1995 bool VisData::VisibleTo(User* user)
1996 {
1997         return true;
1998 }
1999