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                         return;
 445                 }
 446         }
 447         invites.push_back(std::make_pair(channel, invtimeout));
 448 }
 449
 450 void User::RemoveInvite(const irc::string &channel)
 451 {
 452         for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
 453         {
 454                 if (channel == i->first)
 455                 {
 456                         invites.erase(i);
 457                         return;
 458                 }
 459         }
 460 }
 461
 462 bool User::HasModePermission(unsigned char mode, ModeType type)
 463 {
 464         if (!IS_LOCAL(this))
 465                 return true;
 466
 467         if (!IS_OPER(this))
 468                 return false;
 469
 470         if (!AllowedUserModes || !AllowedChanModes)
 471                 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 bool User::AddBuffer(const std::string &a)
 507 {
 508         std::string::size_type start = 0;
 509         std::string::size_type i = a.find('\r');
 510
 511         /*
 512          * The old implementation here took a copy, and rfind() on \r, removing as it found them, before
 513          * copying a second time onto the recvq. That's ok, but involves three copies minimum (recv() to buffer,
 514          * buffer to here, here to recvq) - The new method now copies twice (recv() to buffer, buffer to recvq).
 515          *
 516          * We use find() instead of rfind() for clarity, however unlike the old code, our scanning of the string is
 517          * contiguous: as we specify a startpoint, we never see characters we have scanned previously, making this
 518          * marginally faster in cases with a number of \r hidden early on in the buffer.
 519          *
 520          * How it works:
 521          * Start at first pos of string, find first \r, append everything in the chunk (excluding \r) to recvq. Set
 522          * i ahead of the \r, search for next \r, add next chunk to buffer... repeat.
 523          *              -- w00t (7 may, 2008)
 524          */
 525         if (i == std::string::npos)
 526         {
 527                 // no \r that we need to dance around, just add to buffer
 528                 recvq.append(a);
 529         }
 530         else
 531         {
 532                 // While we can find the end of a chunk to add
 533                 while (i != std::string::npos)
 534                 {
 535                         // Append the chunk that we have
 536                         recvq.append(a, start, (i - start));
 537
 538                         // Start looking for the next one
 539                         start = i + 1;
 540                         i = a.find('\r', start);
 541                 }
 542
 543                 if (start != a.length())
 544                 {
 545                         /*
 546                          * This is here to catch a corner case when we get something like:
 547                          * NICK w0
 548                          * 0t\r\nU
 549                          * SER ...
 550                          * in successive calls to us.
 551                          *
 552                          * Without this conditional, the 'U' on the second case will be dropped,
 553                          * which is most *certainly* not the behaviour we want!
 554                          *              -- w00t
 555                          */
 556                         recvq.append(a, start, (a.length() - start));
 557                 }
 558         }
 559
 560         if (this->MyClass && (recvq.length() > this->MyClass->GetRecvqMax()))
 561         {
 562                 ServerInstance->Users->QuitUser(this, "RecvQ exceeded");
 563                 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());
 564                 return false;
 565         }
 566
 567         return true;
 568 }
 569
 570 bool User::BufferIsReady()
 571 {
 572         return (recvq.find('\n') != std::string::npos);
 573 }
 574
 575 void User::ClearBuffer()
 576 {
 577         recvq.clear();
 578 }
 579
 580 std::string User::GetBuffer()
 581 {
 582         try
 583         {
 584                 if (recvq.empty())
 585                         return "";
 586
 587                 /* Strip any leading \r or \n off the string.
 588                  * Usually there are only one or two of these,
 589                  * so its is computationally cheap to do.
 590                  */
 591                 std::string::iterator t = recvq.begin();
 592                 while (t != recvq.end() && (*t == '\r' || *t == '\n'))
 593                 {
 594                         recvq.erase(t);
 595                         t = recvq.begin();
 596                 }
 597
 598                 for (std::string::iterator x = recvq.begin(); x != recvq.end(); x++)
 599                 {
 600                         /* Find the first complete line, return it as the
 601                          * result, and leave the recvq as whats left
 602                          */
 603                         if (*x == '\n')
 604                         {
 605                                 std::string ret = std::string(recvq.begin(), x);
 606                                 recvq.erase(recvq.begin(), x + 1);
 607                                 return ret;
 608                         }
 609                 }
 610                 return "";
 611         }
 612
 613         catch (...)
 614         {
 615                 ServerInstance->Logs->Log("USERS", DEBUG,"Exception in User::GetBuffer()");
 616                 return "";
 617         }
 618 }
 619
 620 void User::AddWriteBuf(const std::string &data)
 621 {
 622         if (this->quitting)
 623                 return;
 624
 625         if (this->MyClass && (sendq.length() + data.length() > this->MyClass->GetSendqMax()))
 626         {
 627                 /*
 628                  * Fix by brain - Set the error text BEFORE calling, because
 629                  * if we dont it'll recursively  call here over and over again trying
 630                  * to repeatedly add the text to the sendq!
 631                  */
 632                 ServerInstance->Users->QuitUser(this, "SendQ exceeded");
 633                 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());
 634                 return;
 635         }
 636
 637         if (data.length() > MAXBUF - 2) /* MAXBUF has a value of 514, to account for line terminators */
 638                 sendq.append(data.substr(0,MAXBUF - 4)).append("\r\n"); /* MAXBUF-4 = 510 */
 639         else
 640                 sendq.append(data);
 641 }
 642
 643 // send AS MUCH OF THE USERS SENDQ as we are able to (might not be all of it)
 644 void User::FlushWriteBuf()
 645 {
 646         if (this->fd == FD_MAGIC_NUMBER)
 647         {
 648                 sendq.clear();
 649                 return;
 650         }
 651
 652         if ((sendq.length()) && (this->fd != FD_MAGIC_NUMBER))
 653         {
 654                 int old_sendq_length = sendq.length();
 655                 int n_sent = ServerInstance->SE->Send(this, this->sendq.data(), this->sendq.length(), 0);
 656
 657                 if (n_sent == -1)
 658                 {
 659                         if (errno == EAGAIN)
 660                         {
 661                                 /* The socket buffer is full. This isnt fatal,
 662                                  * try again later.
 663                                  */
 664                                 ServerInstance->SE->WantWrite(this);
 665                         }
 666                         else
 667                         {
 668                                 /* Fatal error, set write error and bail */
 669                                 ServerInstance->Users->QuitUser(this, errno ? strerror(errno) : "Write error");
 670                                 return;
 671                         }
 672                 }
 673                 else
 674                 {
 675                         /* advance the queue */
 676                         if (n_sent)
 677                                 this->sendq = this->sendq.substr(n_sent);
 678                         /* update the user's stats counters */
 679                         this->bytes_out += n_sent;
 680                         this->cmds_out++;
 681                         if (n_sent != old_sendq_length)
 682                                 this->ServerInstance->SE->WantWrite(this);
 683                 }
 684         }
 685
 686         /* note: NOT else if! */
 687         if (this->sendq.empty())
 688         {
 689                 FOREACH_MOD(I_OnBufferFlushed,OnBufferFlushed(this));
 690         }
 691 }
 692
 693 void User::Oper(const std::string &opertype, const std::string &opername)
 694 {
 695         char* mycmd;
 696         char* savept;
 697         char* savept2;
 698
 699         try
 700         {
 701                 this->modes[UM_OPERATOR] = 1;
 702                 this->WriteServ("MODE %s :+o", this->nick.c_str());
 703                 FOREACH_MOD(I_OnOper, OnOper(this, opertype));
 704                 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());
 705                 this->oper.assign(opertype, 0, 512);
 706                 ServerInstance->Users->all_opers.push_back(this);
 707
 708                 opertype_t::iterator iter_opertype = ServerInstance->Config->opertypes.find(this->oper.c_str());
 709                 if (iter_opertype != ServerInstance->Config->opertypes.end())
 710                 {
 711
 712                         if (AllowedOperCommands)
 713                                 AllowedOperCommands->clear();
 714                         else
 715                                 AllowedOperCommands = new std::map<std::string, bool>;
 716
 717                         if (!AllowedChanModes)
 718                                 AllowedChanModes = new bool[64];
 719
 720                         if (!AllowedUserModes)
 721                                 AllowedUserModes = new bool[64];
 722
 723                         memset(AllowedUserModes, 0, 64);
 724                         memset(AllowedChanModes, 0, 64);
 725
 726                         char* Classes = strdup(iter_opertype->second);
 727                         char* myclass = strtok_r(Classes," ",&savept);
 728                         while (myclass)
 729                         {
 730                                 operclass_t::iterator iter_operclass = ServerInstance->Config->operclass.find(myclass);
 731                                 if (iter_operclass != ServerInstance->Config->operclass.end())
 732                                 {
 733                                         char* CommandList = strdup(iter_operclass->second.commandlist);
 734                                         mycmd = strtok_r(CommandList," ",&savept2);
 735                                         while (mycmd)
 736                                         {
 737                                                 this->AllowedOperCommands->insert(std::make_pair(mycmd, true));
 738                                                 mycmd = strtok_r(NULL," ",&savept2);
 739                                         }
 740                                         free(CommandList);
 741                                         this->AllowedUserModes['o' - 'A'] = true; // Call me paranoid if you want.
 742                                         for (unsigned char* c = (unsigned char*)iter_operclass->second.umodelist; *c; ++c)
 743                                         {
 744                                                 if (*c == '*')
 745                                                 {
 746                                                         memset(this->AllowedUserModes, (int)(true), 64);
 747                                                 }
 748                                                 else
 749                                                 {
 750                                                         this->AllowedUserModes[*c - 'A'] = true;
 751                                                 }
 752                                         }
 753                                         for (unsigned char* c = (unsigned char*)iter_operclass->second.cmodelist; *c; ++c)
 754                                         {
 755                                                 if (*c == '*')
 756                                                 {
 757                                                         memset(this->AllowedChanModes, (int)(true), 64);
 758                                                 }
 759                                                 else
 760                                                 {
 761                                                         this->AllowedChanModes[*c - 'A'] = true;
 762                                                 }
 763                                         }
 764                                 }
 765                                 myclass = strtok_r(NULL," ",&savept);
 766                         }
 767                         free(Classes);
 768                 }
 769
 770                 FOREACH_MOD(I_OnPostOper,OnPostOper(this, opertype, opername));
 771         }
 772
 773         catch (...)
 774         {
 775                 ServerInstance->Logs->Log("OPER", DEBUG,"Exception in User::Oper()");
 776         }
 777 }
 778
 779 void User::UnOper()
 780 {
 781         if (IS_OPER(this))
 782         {
 783                 /* Remove all oper only modes from the user when the deoper - Bug #466*/
 784                 std::string moderemove("-");
 785
 786                 for (unsigned char letter = 'A'; letter <= 'z'; letter++)
 787                 {
 788                         if (letter != 'o')
 789                         {
 790                                 ModeHandler* mh = ServerInstance->Modes->FindMode(letter, MODETYPE_USER);
 791                                 if (mh && mh->NeedsOper())
 792                                         moderemove += letter;
 793                         }
 794                 }
 795
 796                 std::vector<std::string> parameters;
 797                 parameters.push_back(this->nick);
 798                 parameters.push_back(moderemove);
 799
 800                 ServerInstance->Parser->CallHandler("MODE", parameters, this);
 801
 802                 /* unset their oper type (what IS_OPER checks), and remove +o */
 803                 this->oper.clear();
 804                 this->modes[UM_OPERATOR] = 0;
 805
 806                 /* remove the user from the oper list. Will remove multiple entries as a safeguard against bug #404 */
 807                 ServerInstance->Users->all_opers.remove(this);
 808
 809                 if (AllowedOperCommands)
 810                 {
 811                         delete AllowedOperCommands;
 812                         AllowedOperCommands = NULL;
 813                 }
 814                 if (AllowedUserModes)
 815                 {
 816                         delete[] AllowedUserModes;
 817                         AllowedUserModes = NULL;
 818                 }
 819                 if (AllowedChanModes)
 820                 {
 821                         delete[] AllowedChanModes;
 822                         AllowedChanModes = NULL;
 823                 }
 824
 825         }
 826 }
 827
 828 /* adds or updates an entry in the whowas list */
 829 void User::AddToWhoWas()
 830 {
 831         Command* whowas_command = ServerInstance->Parser->GetHandler("WHOWAS");
 832         if (whowas_command)
 833         {
 834                 std::deque<classbase*> params;
 835                 params.push_back(this);
 836                 whowas_command->HandleInternal(WHOWAS_ADD, params);
 837         }
 838 }
 839
 840 /*
 841  * Check class restrictions
 842  */
 843 void User::CheckClass()
 844 {
 845         ConnectClass* a = this->MyClass;
 846
 847         if ((!a) || (a->GetType() == CC_DENY))
 848         {
 849                 ServerInstance->Users->QuitUser(this, "Unauthorised connection");
 850                 return;
 851         }
 852         else if ((a->GetMaxLocal()) && (ServerInstance->Users->LocalCloneCount(this) > a->GetMaxLocal()))
 853         {
 854                 ServerInstance->Users->QuitUser(this, "No more connections allowed from your host via this connect class (local)");
 855                 ServerInstance->SNO->WriteToSnoMask('A', "WARNING: maximum LOCAL connections (%ld) exceeded for IP %s", a->GetMaxLocal(), this->GetIPString());
 856                 return;
 857         }
 858         else if ((a->GetMaxGlobal()) && (ServerInstance->Users->GlobalCloneCount(this) > a->GetMaxGlobal()))
 859         {
 860                 ServerInstance->Users->QuitUser(this, "No more connections allowed from your host via this connect class (global)");
 861                 ServerInstance->SNO->WriteToSnoMask('A', "WARNING: maximum GLOBAL connections (%ld) exceeded for IP %s", a->GetMaxGlobal(), this->GetIPString());
 862                 return;
 863         }
 864
 865         this->nping = ServerInstance->Time() + a->GetPingTime() + ServerInstance->Config->dns_timeout;
 866 }
 867
 868 bool User::CheckLines()
 869 {
 870         const char* check[] = { "G" , "K", NULL };
 871
 872         if (!this->exempt)
 873         {
 874                 for (int n = 0; check[n]; ++n)
 875                 {
 876                         XLine *r = ServerInstance->XLines->MatchesLine(check[n], this);
 877
 878                         if (r)
 879                         {
 880                                 r->Apply(this);
 881                                 return true;
 882                         }
 883                 }
 884         }
 885
 886         return false;
 887 }
 888
 889 void User::FullConnect()
 890 {
 891         ServerInstance->stats->statsConnects++;
 892         this->idle_lastmsg = ServerInstance->Time();
 893
 894         /*
 895          * You may be thinking "wtf, we checked this in User::AddClient!" - and yes, we did, BUT.
 896          * At the time AddClient is called, we don't have a resolved host, by here we probably do - which
 897          * may put the user into a totally seperate class with different restrictions! so we *must* check again.
 898          * Don't remove this! -- w00t
 899          */
 900         this->SetClass();
 901
 902         /* Check the password, if one is required by the user's connect class.
 903          * This CANNOT be in CheckClass(), because that is called prior to PASS as well!
 904          */
 905         if (this->MyClass && !this->MyClass->GetPass().empty() && !this->haspassed)
 906         {
 907                 ServerInstance->Users->QuitUser(this, "Invalid password");
 908                 return;
 909         }
 910
 911         if (this->CheckLines())
 912                 return;
 913
 914         this->WriteServ("NOTICE Auth :Welcome to \002%s\002!",ServerInstance->Config->Network);
 915         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());
 916         this->WriteNumeric(RPL_YOURHOSTIS, "%s :Your host is %s, running version InspIRCd-1.2",this->nick.c_str(),ServerInstance->Config->ServerName);
 917         this->WriteNumeric(RPL_SERVERCREATED, "%s :This server was created %s %s", this->nick.c_str(), __TIME__, __DATE__);
 918         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());
 919
 920         ServerInstance->Config->Send005(this);
 921         this->WriteNumeric(RPL_YOURUUID, "%s %s :your unique ID", this->nick.c_str(), this->uuid.c_str());
 922
 923
 924         this->ShowMOTD();
 925
 926         /* Now registered */
 927         if (ServerInstance->Users->unregistered_count)
 928                 ServerInstance->Users->unregistered_count--;
 929
 930         /* Trigger LUSERS output, give modules a chance too */
 931         int MOD_RESULT = 0;
 932         std::string command("LUSERS");
 933         std::vector<std::string> parameters;
 934         FOREACH_RESULT(I_OnPreCommand, OnPreCommand(command, parameters, this, true, "LUSERS"));
 935         if (!MOD_RESULT)
 936                 ServerInstance->CallCommandHandler(command, parameters, this);
 937
 938         /*
 939          * We don't set REG_ALL until triggering OnUserConnect, so some module events don't spew out stuff
 940          * for a user that doesn't exist yet.
 941          */
 942         FOREACH_MOD(I_OnUserConnect,OnUserConnect(this));
 943
 944         this->registered = REG_ALL;
 945
 946         ServerInstance->PI->Introduce(this);
 947
 948         FOREACH_MOD(I_OnPostConnect,OnPostConnect(this));
 949
 950         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());
 951         ServerInstance->Logs->Log("BANCACHE", DEBUG, "BanCache: Adding NEGATIVE hit for %s", this->GetIPString());
 952         ServerInstance->BanCache->AddHit(this->GetIPString(), "", "");
 953 }
 954
 955 /** User::UpdateNick()
 956  * re-allocates a nick in the user_hash after they change nicknames,
 957  * returns a pointer to the new user as it may have moved
 958  */
 959 User* User::UpdateNickHash(const char* New)
 960 {
 961         //user_hash::iterator newnick;
 962         user_hash::iterator oldnick = ServerInstance->Users->clientlist->find(this->nick);
 963
 964         if (!irc::string(this->nick.c_str()).compare(New))
 965                 return oldnick->second;
 966
 967         if (oldnick == ServerInstance->Users->clientlist->end())
 968                 return NULL; /* doesnt exist */
 969
 970         User* olduser = oldnick->second;
 971         (*(ServerInstance->Users->clientlist))[New] = olduser;
 972         ServerInstance->Users->clientlist->erase(oldnick);
 973         return olduser;
 974 }
 975
 976 void User::InvalidateCache()
 977 {
 978         /* Invalidate cache */
 979         cached_fullhost.clear();
 980         cached_hostip.clear();
 981         cached_makehost.clear();
 982         cached_fullrealhost.clear();
 983 }
 984
 985 bool User::ForceNickChange(const char* newnick)
 986 {
 987         int MOD_RESULT = 0;
 988
 989         this->InvalidateCache();
 990
 991         FOREACH_RESULT(I_OnUserPreNick,OnUserPreNick(this, newnick));
 992
 993         if (MOD_RESULT)
 994         {
 995                 ServerInstance->stats->statsCollisions++;
 996                 return false;
 997         }
 998
 999         std::deque<classbase*> dummy;
1000         Command* nickhandler = ServerInstance->Parser->GetHandler("NICK");
1001         if (nickhandler) // wtfbbq, when would this not be here
1002         {
1003                 std::vector<std::string> parameters;
1004                 nickhandler->HandleInternal(1, dummy);
1005                 parameters.push_back(newnick);
1006                 bool result = (ServerInstance->Parser->CallHandler("NICK", parameters, this) == CMD_SUCCESS);
1007                 nickhandler->HandleInternal(0, dummy);
1008                 return result;
1009         }
1010
1011         // Unreachable, we hope
1012         return false;
1013 }
1014
1015 void User::SetSockAddr(int protocol_family, const char* sip, int port)
1016 {
1017         this->cachedip = "";
1018
1019         switch (protocol_family)
1020         {
1021 #ifdef SUPPORT_IP6LINKS
1022                 case AF_INET6:
1023                 {
1024                         sockaddr_in6* sin = new sockaddr_in6;
1025                         sin->sin6_family = AF_INET6;
1026                         sin->sin6_port = port;
1027                         inet_pton(AF_INET6, sip, &sin->sin6_addr);
1028                         this->ip = (sockaddr*)sin;
1029                 }
1030                 break;
1031 #endif
1032                 case AF_INET:
1033                 {
1034                         sockaddr_in* sin = new sockaddr_in;
1035                         sin->sin_family = AF_INET;
1036                         sin->sin_port = port;
1037                         inet_pton(AF_INET, sip, &sin->sin_addr);
1038                         this->ip = (sockaddr*)sin;
1039                 }
1040                 break;
1041                 default:
1042                         ServerInstance->Logs->Log("USERS",DEBUG,"Uh oh, I dont know protocol %d to be set on '%s'!", protocol_family, this->nick.c_str());
1043                 break;
1044         }
1045 }
1046
1047 int User::GetPort()
1048 {
1049         if (this->ip == NULL)
1050                 return 0;
1051
1052         switch (this->GetProtocolFamily())
1053         {
1054 #ifdef SUPPORT_IP6LINKS
1055                 case AF_INET6:
1056                 {
1057                         sockaddr_in6* sin = (sockaddr_in6*)this->ip;
1058                         return sin->sin6_port;
1059                 }
1060                 break;
1061 #endif
1062                 case AF_INET:
1063                 {
1064                         sockaddr_in* sin = (sockaddr_in*)this->ip;
1065                         return sin->sin_port;
1066                 }
1067                 break;
1068                 default:
1069                 break;
1070         }
1071         return 0;
1072 }
1073
1074 int User::GetProtocolFamily()
1075 {
1076         if (this->ip == NULL)
1077                 return 0;
1078
1079         sockaddr_in* sin = (sockaddr_in*)this->ip;
1080         return sin->sin_family;
1081 }
1082
1083 const char* User::GetCIDRMask(int range)
1084 {
1085         static char buf[44];
1086
1087         if (this->ip == NULL)
1088                 return "";
1089
1090         if (range < 0)
1091                 throw "Negative range, sorry, no.";
1092
1093         /*
1094          * Original code written by Oliver Lupton (Om).
1095          * Integrated by me. Thanks. :) -- w00t
1096          */
1097         switch (this->GetProtocolFamily())
1098         {
1099 #ifdef SUPPORT_IP6LINKS
1100                 case AF_INET6:
1101                 {
1102                         /* unsigned char s6_addr[16]; */
1103                         struct in6_addr v6;
1104                         sockaddr_in6* sin;
1105                         int i, bytestozero, extrabits;
1106                         char buffer[40];
1107
1108                         if(range > 128)
1109                                 throw "CIDR mask width greater than address width (IPv6, 128 bit)";
1110
1111                         /* Access the user's IP structure directly */
1112                         sin = (sockaddr_in6*)this->ip;
1113
1114                         /* To create the CIDR mask we want to set all the bits after 'range' bits of the address
1115                          * to zero. This means the last (128 - range) bits of the address must be set to zero.
1116                          * Hence this number divided by 8 is the number of whole bytes from the end of the address
1117                          * which must be set to zero.
1118                          */
1119                         bytestozero = (128 - range) / 8;
1120
1121                         /* Some of the least significant bits of the next most significant byte may also have to
1122                          * be zeroed. The number of bits is the remainder of the above division.
1123                          */
1124                         extrabits = (128 - range) % 8;
1125
1126                         /* Populate our working struct with the parts of the user's IP which are required in the
1127                          * final CIDR mask. Set all the subsequent bytes to zero.
1128                          * (16 - bytestozero) is the number of bytes which must be populated with actual IP data.
1129                          */
1130                         for(i = 0; i < (16 - bytestozero); i++)
1131                         {
1132                                 v6.s6_addr[i] = sin->sin6_addr.s6_addr[i];
1133                         }
1134
1135                         /* And zero all the remaining bytes in the IP. */
1136                         for(; i < 16; i++)
1137                         {
1138                                 v6.s6_addr[i] = 0;
1139                         }
1140
1141                         /* And finally, zero the extra bits required. */
1142                         v6.s6_addr[15 - bytestozero] = (v6.s6_addr[15 - bytestozero] >> extrabits) << extrabits;
1143
1144                         snprintf(buf, 44, "%s/%d", inet_ntop(AF_INET6, &v6, buffer, 40), range);
1145                         return buf;
1146                 }
1147                 break;
1148 #endif
1149                 case AF_INET:
1150                 {
1151                         struct in_addr v4;
1152                         sockaddr_in* sin;
1153                         char buffer[16];
1154
1155                         if (range > 32)
1156                                 throw "CIDR mask width greater than address width (IPv4, 32 bit)";
1157
1158                         /* Users already have a sockaddr* pointer (User::ip) which contains either a v4 or v6 structure */
1159                         sin = (sockaddr_in*)this->ip;
1160                         v4.s_addr = sin->sin_addr.s_addr;
1161
1162                         /* To create the CIDR mask we want to set all the bits after 'range' bits of the address
1163                          * to zero. This means the last (32 - range) bits of the address must be set to zero.
1164                          * This is done by shifting the value right and then back left by (32 - range) bits.
1165                          */
1166                         if(range > 0)
1167                         {
1168                                 v4.s_addr = ntohl(v4.s_addr);
1169                                 v4.s_addr = (v4.s_addr >> (32 - range)) << (32 - range);
1170                                 v4.s_addr = htonl(v4.s_addr);
1171                         }
1172                         else
1173                         {
1174                                 /* a range of zero would cause a 32 bit value to be shifted by 32 bits.
1175                                  * this has undefined behaviour, but for CIDR purposes the resulting mask
1176                                  * from a.b.c.d/0 is 0.0.0.0/0
1177                                  */
1178                                 v4.s_addr = 0;
1179                         }
1180
1181                         snprintf(buf, 44, "%s/%d", inet_ntop(AF_INET, &v4, buffer, 16), range);
1182                         return buf;
1183                 }
1184                 break;
1185         }
1186
1187         return ""; // unused, but oh well
1188 }
1189
1190 const char* User::GetIPString(bool translate4in6)
1191 {
1192         static char buf[40];
1193
1194         if (this->ip == NULL)
1195                 return "";
1196
1197         if (!this->cachedip.empty())
1198                 return this->cachedip.c_str();
1199
1200         switch (this->GetProtocolFamily())
1201         {
1202 #ifdef SUPPORT_IP6LINKS
1203                 case AF_INET6:
1204                 {
1205                         static char temp[1024];
1206
1207                         sockaddr_in6* sin = (sockaddr_in6*)this->ip;
1208                         inet_ntop(sin->sin6_family, &sin->sin6_addr, buf, sizeof(buf));
1209                         /* IP addresses starting with a : on irc are a Bad Thing (tm) */
1210                         if (*buf == ':')
1211                         {
1212                                 strlcpy(&temp[1], buf, sizeof(temp) - 1);
1213                                 *temp = '0';
1214                                 if (translate4in6 && !strncmp(temp, "0::ffff:", 8))
1215                                 {
1216                                         this->cachedip = temp + 8;
1217                                         return temp + 8;
1218                                 }
1219
1220                                 this->cachedip = temp;
1221                                 return temp;
1222                         }
1223
1224                         this->cachedip = buf;
1225                         return buf;
1226                 }
1227                 break;
1228 #endif
1229                 case AF_INET:
1230                 {
1231                         sockaddr_in* sin = (sockaddr_in*)this->ip;
1232                         inet_ntop(sin->sin_family, &sin->sin_addr, buf, sizeof(buf));
1233                         this->cachedip = buf;
1234                         return buf;
1235                 }
1236                 break;
1237                 default:
1238                 break;
1239         }
1240
1241         // Unreachable, probably
1242         return "";
1243 }
1244
1245 /** NOTE: We cannot pass a const reference to this method.
1246  * The string is changed by the workings of the method,
1247  * so that if we pass const ref, we end up copying it to
1248  * something we can change anyway. Makes sense to just let
1249  * the compiler do that copy for us.
1250  */
1251 void User::Write(std::string text)
1252 {
1253         if (!ServerInstance->SE->BoundsCheckFd(this))
1254                 return;
1255
1256         try
1257         {
1258                 ServerInstance->Logs->Log("USEROUTPUT", DEBUG,"C[%d] O %s", this->GetFd(), text.c_str());
1259                 text.append("\r\n");
1260         }
1261         catch (...)
1262         {
1263                 ServerInstance->Logs->Log("USEROUTPUT", DEBUG,"Exception in User::Write() std::string::append");
1264                 return;
1265         }
1266
1267         if (this->io)
1268         {
1269                 /* XXX: The lack of buffering here is NOT a bug, modules implementing this interface have to
1270                  * implement their own buffering mechanisms
1271                  */
1272                 try
1273                 {
1274                         this->io->OnRawSocketWrite(this->fd, text.data(), text.length());
1275                 }
1276                 catch (CoreException& modexcept)
1277                 {
1278                         ServerInstance->Logs->Log("USEROUTPUT", DEBUG, "%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
1279                 }
1280         }
1281         else
1282         {
1283                 this->AddWriteBuf(text);
1284         }
1285         ServerInstance->stats->statsSent += text.length();
1286         this->ServerInstance->SE->WantWrite(this);
1287 }
1288
1289 /** Write()
1290  */
1291 void User::Write(const char *text, ...)
1292 {
1293         va_list argsPtr;
1294         char textbuffer[MAXBUF];
1295
1296         va_start(argsPtr, text);
1297         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1298         va_end(argsPtr);
1299
1300         this->Write(std::string(textbuffer));
1301 }
1302
1303 void User::WriteServ(const std::string& text)
1304 {
1305         char textbuffer[MAXBUF];
1306
1307         snprintf(textbuffer,MAXBUF,":%s %s",ServerInstance->Config->ServerName,text.c_str());
1308         this->Write(std::string(textbuffer));
1309 }
1310
1311 /** WriteServ()
1312  *  Same as Write(), except `text' is prefixed with `:server.name '.
1313  */
1314 void User::WriteServ(const char* text, ...)
1315 {
1316         va_list argsPtr;
1317         char textbuffer[MAXBUF];
1318
1319         va_start(argsPtr, text);
1320         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1321         va_end(argsPtr);
1322
1323         this->WriteServ(std::string(textbuffer));
1324 }
1325
1326
1327 void User::WriteNumeric(unsigned int numeric, const char* text, ...)
1328 {
1329         va_list argsPtr;
1330         char textbuffer[MAXBUF];
1331
1332         va_start(argsPtr, text);
1333         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1334         va_end(argsPtr);
1335
1336         this->WriteNumeric(numeric, std::string(textbuffer));
1337 }
1338
1339 void User::WriteNumeric(unsigned int numeric, const std::string &text)
1340 {
1341         char textbuffer[MAXBUF];
1342         int MOD_RESULT = 0;
1343
1344         FOREACH_RESULT(I_OnNumeric, OnNumeric(this, numeric, text));
1345
1346         if (MOD_RESULT)
1347                 return;
1348
1349         snprintf(textbuffer,MAXBUF,":%s %03u %s",ServerInstance->Config->ServerName, numeric, text.c_str());
1350         this->Write(std::string(textbuffer));
1351 }
1352
1353 void User::WriteFrom(User *user, const std::string &text)
1354 {
1355         char tb[MAXBUF];
1356
1357         snprintf(tb,MAXBUF,":%s %s",user->GetFullHost().c_str(),text.c_str());
1358
1359         this->Write(std::string(tb));
1360 }
1361
1362
1363 /* write text from an originating user to originating user */
1364
1365 void User::WriteFrom(User *user, const char* text, ...)
1366 {
1367         va_list argsPtr;
1368         char textbuffer[MAXBUF];
1369
1370         va_start(argsPtr, text);
1371         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1372         va_end(argsPtr);
1373
1374         this->WriteFrom(user, std::string(textbuffer));
1375 }
1376
1377
1378 /* write text to an destination user from a source user (e.g. user privmsg) */
1379
1380 void User::WriteTo(User *dest, const char *data, ...)
1381 {
1382         char textbuffer[MAXBUF];
1383         va_list argsPtr;
1384
1385         va_start(argsPtr, data);
1386         vsnprintf(textbuffer, MAXBUF, data, argsPtr);
1387         va_end(argsPtr);
1388
1389         this->WriteTo(dest, std::string(textbuffer));
1390 }
1391
1392 void User::WriteTo(User *dest, const std::string &data)
1393 {
1394         dest->WriteFrom(this, data);
1395 }
1396
1397
1398 void User::WriteCommon(const char* text, ...)
1399 {
1400         char textbuffer[MAXBUF];
1401         va_list argsPtr;
1402
1403         if (this->registered != REG_ALL)
1404                 return;
1405
1406         va_start(argsPtr, text);
1407         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1408         va_end(argsPtr);
1409
1410         this->WriteCommon(std::string(textbuffer));
1411 }
1412
1413 void User::WriteCommon(const std::string &text)
1414 {
1415         bool sent_to_at_least_one = false;
1416         char tb[MAXBUF];
1417
1418         if (this->registered != REG_ALL)
1419                 return;
1420
1421         uniq_id++;
1422
1423         if (!already_sent)
1424                 InitializeAlreadySent(ServerInstance->SE);
1425
1426         /* We dont want to be doing this n times, just once */
1427         snprintf(tb,MAXBUF,":%s %s",this->GetFullHost().c_str(),text.c_str());
1428         std::string out = tb;
1429
1430         for (UCListIter v = this->chans.begin(); v != this->chans.end(); v++)
1431         {
1432                 CUList* ulist = v->first->GetUsers();
1433                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1434                 {
1435                         if ((IS_LOCAL(i->first)) && (already_sent[i->first->fd] != uniq_id))
1436                         {
1437                                 already_sent[i->first->fd] = uniq_id;
1438                                 i->first->Write(out);
1439                                 sent_to_at_least_one = true;
1440                         }
1441                 }
1442         }
1443
1444         /*
1445          * if the user was not in any channels, no users will receive the text. Make sure the user
1446          * receives their OWN message for WriteCommon
1447          */
1448         if (!sent_to_at_least_one)
1449         {
1450                 this->Write(std::string(tb));
1451         }
1452 }
1453
1454
1455 /* write a formatted string to all users who share at least one common
1456  * channel, NOT including the source user e.g. for use in QUIT
1457  */
1458
1459 void User::WriteCommonExcept(const char* text, ...)
1460 {
1461         char textbuffer[MAXBUF];
1462         va_list argsPtr;
1463
1464         va_start(argsPtr, text);
1465         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1466         va_end(argsPtr);
1467
1468         this->WriteCommonExcept(std::string(textbuffer));
1469 }
1470
1471 void User::WriteCommonQuit(const std::string &normal_text, const std::string &oper_text)
1472 {
1473         char tb1[MAXBUF];
1474         char tb2[MAXBUF];
1475
1476         if (this->registered != REG_ALL)
1477                 return;
1478
1479         uniq_id++;
1480
1481         if (!already_sent)
1482                 InitializeAlreadySent(ServerInstance->SE);
1483
1484         snprintf(tb1,MAXBUF,":%s QUIT :%s",this->GetFullHost().c_str(),normal_text.c_str());
1485         snprintf(tb2,MAXBUF,":%s QUIT :%s",this->GetFullHost().c_str(),oper_text.c_str());
1486         std::string out1 = tb1;
1487         std::string out2 = tb2;
1488
1489         for (UCListIter v = this->chans.begin(); v != this->chans.end(); v++)
1490         {
1491                 CUList *ulist = v->first->GetUsers();
1492                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1493                 {
1494                         if (this != i->first)
1495                         {
1496                                 if ((IS_LOCAL(i->first)) && (already_sent[i->first->fd] != uniq_id))
1497                                 {
1498                                         already_sent[i->first->fd] = uniq_id;
1499                                         i->first->Write(IS_OPER(i->first) ? out2 : out1);
1500                                 }
1501                         }
1502                 }
1503         }
1504 }
1505
1506 void User::WriteCommonExcept(const std::string &text)
1507 {
1508         char tb1[MAXBUF];
1509         std::string out1;
1510
1511         if (this->registered != REG_ALL)
1512                 return;
1513
1514         uniq_id++;
1515
1516         if (!already_sent)
1517                 InitializeAlreadySent(ServerInstance->SE);
1518
1519         snprintf(tb1,MAXBUF,":%s %s",this->GetFullHost().c_str(),text.c_str());
1520         out1 = tb1;
1521
1522         for (UCListIter v = this->chans.begin(); v != this->chans.end(); v++)
1523         {
1524                 CUList *ulist = v->first->GetUsers();
1525                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1526                 {
1527                         if (this != i->first)
1528                         {
1529                                 if ((IS_LOCAL(i->first)) && (already_sent[i->first->fd] != uniq_id))
1530                                 {
1531                                         already_sent[i->first->fd] = uniq_id;
1532                                         i->first->Write(out1);
1533                                 }
1534                         }
1535                 }
1536         }
1537
1538 }
1539
1540 void User::WriteWallOps(const std::string &text)
1541 {
1542         if (!IS_LOCAL(this))
1543                 return;
1544
1545         std::string wallop("WALLOPS :");
1546         wallop.append(text);
1547
1548         for (std::vector<User*>::const_iterator i = ServerInstance->Users->local_users.begin(); i != ServerInstance->Users->local_users.end(); i++)
1549         {
1550                 User* t = *i;
1551                 if (t->IsModeSet('w'))
1552                         this->WriteTo(t,wallop);
1553         }
1554 }
1555
1556 void User::WriteWallOps(const char* text, ...)
1557 {
1558         if (!IS_LOCAL(this))
1559                 return;
1560
1561         char textbuffer[MAXBUF];
1562         va_list argsPtr;
1563
1564         va_start(argsPtr, text);
1565         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1566         va_end(argsPtr);
1567
1568         this->WriteWallOps(std::string(textbuffer));
1569 }
1570
1571 /* return 0 or 1 depending if users u and u2 share one or more common channels
1572  * (used by QUIT, NICK etc which arent channel specific notices)
1573  *
1574  * The old algorithm in 1.0 for this was relatively inefficient, iterating over
1575  * the first users channels then the second users channels within the outer loop,
1576  * therefore it was a maximum of x*y iterations (upon returning 0 and checking
1577  * all possible iterations). However this new function instead checks against the
1578  * channel's userlist in the inner loop which is a std::map<User*,User*>
1579  * and saves us time as we already know what pointer value we are after.
1580  * Don't quote me on the maths as i am not a mathematician or computer scientist,
1581  * but i believe this algorithm is now x+(log y) maximum iterations instead.
1582  */
1583 bool User::SharesChannelWith(User *other)
1584 {
1585         if ((!other) || (this->registered != REG_ALL) || (other->registered != REG_ALL))
1586                 return false;
1587
1588         /* Outer loop */
1589         for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1590         {
1591                 /* Eliminate the inner loop (which used to be ~equal in size to the outer loop)
1592                  * by replacing it with a map::find which *should* be more efficient
1593                  */
1594                 if (i->first->HasUser(other))
1595                         return true;
1596         }
1597         return false;
1598 }
1599
1600 bool User::ChangeName(const char* gecos)
1601 {
1602         if (!this->fullname.compare(gecos))
1603                 return true;
1604
1605         if (IS_LOCAL(this))
1606         {
1607                 int MOD_RESULT = 0;
1608                 FOREACH_RESULT(I_OnChangeLocalUserGECOS,OnChangeLocalUserGECOS(this,gecos));
1609                 if (MOD_RESULT)
1610                         return false;
1611                 FOREACH_MOD(I_OnChangeName,OnChangeName(this,gecos));
1612         }
1613         this->fullname.assign(gecos, 0, ServerInstance->Config->Limits.MaxGecos);
1614
1615         return true;
1616 }
1617
1618 bool User::ChangeDisplayedHost(const char* shost)
1619 {
1620         if (dhost == shost)
1621                 return true;
1622
1623         if (IS_LOCAL(this))
1624         {
1625                 int MOD_RESULT = 0;
1626                 FOREACH_RESULT(I_OnChangeLocalUserHost,OnChangeLocalUserHost(this,shost));
1627                 if (MOD_RESULT)
1628                         return false;
1629                 FOREACH_MOD(I_OnChangeHost,OnChangeHost(this,shost));
1630         }
1631
1632         if (this->ServerInstance->Config->CycleHosts)
1633                 this->WriteCommonExcept("QUIT :Changing hosts");
1634
1635         /* Fix by Om: User::dhost is 65 long, this was truncating some long hosts */
1636         this->dhost.assign(shost, 0, 64);
1637
1638         this->InvalidateCache();
1639
1640         if (this->ServerInstance->Config->CycleHosts)
1641         {
1642                 for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1643                 {
1644                         i->first->WriteAllExceptSender(this, false, 0, "JOIN %s", i->first->name.c_str());
1645                         std::string n = this->ServerInstance->Modes->ModeString(this, i->first);
1646                         if (n.length() > 0)
1647                                 i->first->WriteAllExceptSender(this, true, 0, "MODE %s +%s", i->first->name.c_str(), n.c_str());
1648                 }
1649         }
1650
1651         if (IS_LOCAL(this))
1652                 this->WriteNumeric(RPL_YOURDISPLAYEDHOST, "%s %s :is now your displayed host",this->nick.c_str(),this->dhost.c_str());
1653
1654         return true;
1655 }
1656
1657 bool User::ChangeIdent(const char* newident)
1658 {
1659         if (!this->ident.compare(newident))
1660                 return true;
1661
1662         if (this->ServerInstance->Config->CycleHosts)
1663                 this->WriteCommonExcept("%s","QUIT :Changing ident");
1664
1665         this->ident.assign(newident, 0, ServerInstance->Config->Limits.IdentMax + 1);
1666
1667         this->InvalidateCache();
1668
1669         if (this->ServerInstance->Config->CycleHosts)
1670         {
1671                 for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1672                 {
1673                         i->first->WriteAllExceptSender(this, false, 0, "JOIN %s", i->first->name.c_str());
1674                         std::string n = this->ServerInstance->Modes->ModeString(this, i->first);
1675                         if (n.length() > 0)
1676                                 i->first->WriteAllExceptSender(this, true, 0, "MODE %s +%s", i->first->name.c_str(), n.c_str());
1677                 }
1678         }
1679
1680         return true;
1681 }
1682
1683 void User::SendAll(const char* command, const char* text, ...)
1684 {
1685         char textbuffer[MAXBUF];
1686         char formatbuffer[MAXBUF];
1687         va_list argsPtr;
1688
1689         va_start(argsPtr, text);
1690         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1691         va_end(argsPtr);
1692
1693         snprintf(formatbuffer,MAXBUF,":%s %s $* :%s", this->GetFullHost().c_str(), command, textbuffer);
1694         std::string fmt = formatbuffer;
1695
1696         for (std::vector<User*>::const_iterator i = ServerInstance->Users->local_users.begin(); i != ServerInstance->Users->local_users.end(); i++)
1697         {
1698                 (*i)->Write(fmt);
1699         }
1700 }
1701
1702
1703 std::string User::ChannelList(User* source)
1704 {
1705         std::string list;
1706
1707         for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1708         {
1709                 /* If the target is the same as the sender, let them see all their channels.
1710                  * If the channel is NOT private/secret OR the user shares a common channel
1711                  * If the user is an oper, and the <options:operspywhois> option is set.
1712                  */
1713                 if ((source == this) || (IS_OPER(source) && ServerInstance->Config->OperSpyWhois) || (((!i->first->IsModeSet('p')) && (!i->first->IsModeSet('s'))) || (i->first->HasUser(source))))
1714                 {
1715                         list.append(i->first->GetPrefixChar(this)).append(i->first->name).append(" ");
1716                 }
1717         }
1718
1719         return list;
1720 }
1721
1722 void User::SplitChanList(User* dest, const std::string &cl)
1723 {
1724         std::string line;
1725         std::ostringstream prefix;
1726         std::string::size_type start, pos, length;
1727
1728         prefix << this->nick << " " << dest->nick << " :";
1729         line = prefix.str();
1730         int namelen = strlen(ServerInstance->Config->ServerName) + 6;
1731
1732         for (start = 0; (pos = cl.find(' ', start)) != std::string::npos; start = pos+1)
1733         {
1734                 length = (pos == std::string::npos) ? cl.length() : pos;
1735
1736                 if (line.length() + namelen + length - start > 510)
1737                 {
1738                         ServerInstance->SendWhoisLine(this, dest, 319, "%s", line.c_str());
1739                         line = prefix.str();
1740                 }
1741
1742                 if(pos == std::string::npos)
1743                 {
1744                         line.append(cl.substr(start, length - start));
1745                         break;
1746                 }
1747                 else
1748                 {
1749                         line.append(cl.substr(start, length - start + 1));
1750                 }
1751         }
1752
1753         if (line.length())
1754         {
1755                 ServerInstance->SendWhoisLine(this, dest, 319, "%s", line.c_str());
1756         }
1757 }
1758
1759 /*
1760  * Sets a user's connection class.
1761  * If the class name is provided, it will be used. Otherwise, the class will be guessed using host/ip/ident/etc.
1762  * NOTE: If the <ALLOW> or <DENY> tag specifies an ip, and this user resolves,
1763  * then their ip will be taken as 'priority' anyway, so for example,
1764  * <connect allow="127.0.0.1"> will match joe!bloggs@localhost
1765  */
1766 ConnectClass* User::SetClass(const std::string &explicit_name)
1767 {
1768         ConnectClass *found = NULL;
1769
1770         if (!IS_LOCAL(this))
1771                 return NULL;
1772
1773         ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Setting connect class for UID %s", this->uuid.c_str());
1774
1775         if (!explicit_name.empty())
1776         {
1777                 for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++)
1778                 {
1779                         ConnectClass* c = *i;
1780
1781                         if (c->GetDisabled())
1782                                 continue; // can't possibly match, removed from conf
1783
1784                         if (explicit_name == c->GetName())
1785                         {
1786                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Explicitly set to %s", explicit_name.c_str());
1787                                 found = c;
1788                         }
1789                 }
1790         }
1791         else
1792         {
1793                 for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++)
1794                 {
1795                         ConnectClass* c = *i;
1796
1797                         if (c->GetType() == CC_ALLOW)
1798                         {
1799                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "ALLOW %s %d %s", c->GetHost().c_str(), c->GetPort(), c->GetName().c_str());
1800                         }
1801                         else
1802                         {
1803                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "DENY %s %d %s", c->GetHost().c_str(), c->GetPort(), c->GetName().c_str());
1804                         }
1805
1806                         /* if it's disabled, we can't match this one. */
1807                         if (c->GetDisabled())
1808                         {
1809                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Class disabled");
1810                                 continue;
1811                         }
1812
1813                         /* check if host matches.. */
1814                         if (((!match(this->GetIPString(),c->GetHost(),true)) && (!match(this->host,c->GetHost()))))
1815                         {
1816                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "No host match (for %s)", c->GetHost().c_str());
1817                                 continue;
1818                         }
1819
1820                         /*
1821                          * deny change if change will take class over the limit check it HERE, not after we found a matching class,
1822                          * because we should attempt to find another class if this one doesn't match us. -- w00t
1823                          */
1824                         if (c->limit && (c->RefCount + 1 >= c->limit))
1825                         {
1826                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "OOPS: Connect class limit (%lu) hit, denying", c->limit);
1827                                 continue;
1828                         }
1829
1830                         /* if it requires a port ... */
1831                         if (c->GetPort())
1832                         {
1833                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Requires port (%d)", c->GetPort());
1834
1835                                 /* and our port doesn't match, fail. */
1836                                 if (this->GetPort() != c->GetPort())
1837                                 {
1838                                         ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Port match failed (%d)", this->GetPort());
1839                                         continue;
1840                                 }
1841                         }
1842
1843                         /* we stop at the first class that meets ALL critera. */
1844                         found = c;
1845                         break;
1846                 }
1847         }
1848
1849         /*
1850          * Okay, assuming we found a class that matches.. switch us into that class, keeping refcounts up to date.
1851          */
1852         if (found)
1853         {
1854                 /* only fiddle with refcounts if they are already in a class .. */
1855                 if (this->MyClass)
1856                 {
1857                         if (found == this->MyClass) // no point changing this shit :P
1858                                 return this->MyClass;
1859                         this->MyClass->RefCount--;
1860                         ServerInstance->Logs->Log("USERS", DEBUG, "Untying user from connect class -- refcount: %lu", this->MyClass->RefCount);
1861                 }
1862
1863                 this->MyClass = found;
1864                 this->MyClass->RefCount++;
1865                 ServerInstance->Logs->Log("USERS", DEBUG, "User tied to new class -- connect refcount now: %lu", this->MyClass->RefCount);
1866         }
1867
1868         return this->MyClass;
1869 }
1870
1871 /* looks up a users password for their connection class (<ALLOW>/<DENY> tags)
1872  * NOTE: If the <ALLOW> or <DENY> tag specifies an ip, and this user resolves,
1873  * then their ip will be taken as 'priority' anyway, so for example,
1874  * <connect allow="127.0.0.1"> will match joe!bloggs@localhost
1875  */
1876 ConnectClass* User::GetClass()
1877 {
1878         return this->MyClass;
1879 }
1880
1881 void User::PurgeEmptyChannels()
1882 {
1883         std::vector<Channel*> to_delete;
1884
1885         // firstly decrement the count on each channel
1886         for (UCListIter f = this->chans.begin(); f != this->chans.end(); f++)
1887         {
1888                 f->first->RemoveAllPrefixes(this);
1889                 if (f->first->DelUser(this) == 0)
1890                 {
1891                         /* No users left in here, mark it for deletion */
1892                         try
1893                         {
1894                                 to_delete.push_back(f->first);
1895                         }
1896                         catch (...)
1897                         {
1898                                 ServerInstance->Logs->Log("USERS", DEBUG,"Exception in User::PurgeEmptyChannels to_delete.push_back()");
1899                         }
1900                 }
1901         }
1902
1903         for (std::vector<Channel*>::iterator n = to_delete.begin(); n != to_delete.end(); n++)
1904         {
1905                 Channel* thischan = *n;
1906                 chan_hash::iterator i2 = ServerInstance->chanlist->find(thischan->name);
1907                 if (i2 != ServerInstance->chanlist->end())
1908                 {
1909                         FOREACH_MOD(I_OnChannelDelete,OnChannelDelete(i2->second));
1910                         delete i2->second;
1911                         ServerInstance->chanlist->erase(i2);
1912                         this->chans.erase(*n);
1913                 }
1914         }
1915
1916         this->UnOper();
1917 }
1918
1919 void User::ShowMOTD()
1920 {
1921         if (!ServerInstance->Config->MOTD.size())
1922         {
1923                 this->WriteNumeric(ERR_NOMOTD, "%s :Message of the day file is missing.",this->nick.c_str());
1924                 return;
1925         }
1926         this->WriteNumeric(RPL_MOTDSTART, "%s :%s message of the day", this->nick.c_str(), ServerInstance->Config->ServerName);
1927
1928         for (file_cache::iterator i = ServerInstance->Config->MOTD.begin(); i != ServerInstance->Config->MOTD.end(); i++)
1929                 this->WriteNumeric(RPL_MOTD, "%s :- %s",this->nick.c_str(),i->c_str());
1930
1931         this->WriteNumeric(RPL_ENDOFMOTD, "%s :End of message of the day.", this->nick.c_str());
1932 }
1933
1934 void User::ShowRULES()
1935 {
1936         if (!ServerInstance->Config->RULES.size())
1937         {
1938                 this->WriteNumeric(ERR_NORULES, "%s :RULES File is missing",this->nick.c_str());
1939                 return;
1940         }
1941
1942         this->WriteNumeric(RPL_RULESTART, "%s :- %s Server Rules -",this->nick.c_str(),ServerInstance->Config->ServerName);
1943
1944         for (file_cache::iterator i = ServerInstance->Config->RULES.begin(); i != ServerInstance->Config->RULES.end(); i++)
1945                 this->WriteNumeric(RPL_RULES, "%s :- %s",this->nick.c_str(),i->c_str());
1946
1947         this->WriteNumeric(RPL_RULESEND, "%s :End of RULES command.",this->nick.c_str());
1948 }
1949
1950 void User::HandleEvent(EventType et, int errornum)
1951 {
1952         if (this->quitting) // drop everything, user is due to be quit
1953                 return;
1954
1955         switch (et)
1956         {
1957                 case EVENT_READ:
1958                         ServerInstance->ProcessUser(this);
1959                 break;
1960                 case EVENT_WRITE:
1961                         this->FlushWriteBuf();
1962                 break;
1963                 case EVENT_ERROR:
1964                         ServerInstance->Users->QuitUser(this, errornum ? strerror(errornum) : "Client closed the connection");
1965                 break;
1966         }
1967 }
1968
1969 void User::SetOperQuit(const std::string &oquit)
1970 {
1971         operquitmsg = oquit;
1972 }
1973
1974 const std::string& User::GetOperQuit()
1975 {
1976         return operquitmsg;
1977 }
1978
1979 void User::IncreasePenalty(int increase)
1980 {
1981         this->Penalty += increase;
1982 }
1983
1984 void User::DecreasePenalty(int decrease)
1985 {
1986         this->Penalty -= decrease;
1987 }
1988
1989 VisData::VisData()
1990 {
1991 }
1992
1993 VisData::~VisData()
1994 {
1995 }
1996
1997 bool VisData::VisibleTo(User* user)
1998 {
1999         return true;
2000 }
2001