src/users.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2009 InspIRCd Development Team
   6  * See: http://wiki.inspircd.org/Credits
   7  *
   8  * This program is free but copyrighted software; see
   9  *            the file COPYING for details.
  10  *
  11  * ---------------------------------------------------
  12  */
  13
  14 #include "inspircd.h"
  15 #include <stdarg.h>
  16 #include "socketengine.h"
  17 #include "xline.h"
  18 #include "bancache.h"
  19 #include "commands/cmd_whowas.h"
  20
  21 typedef unsigned int uniq_id_t;
  22 class sent
  23 {
  24         uniq_id_t uniq_id;
  25         uniq_id_t* array;
  26         void init()
  27         {
  28                 if (!array)
  29                         array = new uniq_id_t[ServerInstance->SE->GetMaxFds()];
  30                 memset(array, 0, ServerInstance->SE->GetMaxFds() * sizeof(uniq_id_t));
  31                 uniq_id++;
  32         }
  33  public:
  34         sent() : uniq_id(static_cast<uniq_id_t>(-1)), array(NULL) {}
  35         inline uniq_id_t operator++()
  36         {
  37                 if (++uniq_id == 0)
  38                         init();
  39                 return uniq_id;
  40         }
  41         inline uniq_id_t& operator[](int i)
  42         {
  43                 return array[i];
  44         }
  45         ~sent()
  46         {
  47                 delete array;
  48         }
  49 };
  50
  51 static sent already_sent;
  52
  53 std::string User::ProcessNoticeMasks(const char *sm)
  54 {
  55         bool adding = true, oldadding = false;
  56         const char *c = sm;
  57         std::string output;
  58
  59         while (c && *c)
  60         {
  61                 switch (*c)
  62                 {
  63                         case '+':
  64                                 adding = true;
  65                         break;
  66                         case '-':
  67                                 adding = false;
  68                         break;
  69                         case '*':
  70                                 for (unsigned char d = 'A'; d <= 'z'; d++)
  71                                 {
  72                                         if (ServerInstance->SNO->IsEnabled(d))
  73                                         {
  74                                                 if ((!IsNoticeMaskSet(d) && adding) || (IsNoticeMaskSet(d) && !adding))
  75                                                 {
  76                                                         if ((oldadding != adding) || (!output.length()))
  77                                                                 output += (adding ? '+' : '-');
  78
  79                                                         this->SetNoticeMask(d, adding);
  80
  81                                                         output += d;
  82                                                 }
  83                                         }
  84                                         oldadding = adding;
  85                                 }
  86                         break;
  87                         default:
  88                                 if ((*c >= 'A') && (*c <= 'z') && (ServerInstance->SNO->IsEnabled(*c)))
  89                                 {
  90                                         if ((!IsNoticeMaskSet(*c) && adding) || (IsNoticeMaskSet(*c) && !adding))
  91                                         {
  92                                                 if ((oldadding != adding) || (!output.length()))
  93                                                         output += (adding ? '+' : '-');
  94
  95                                                 this->SetNoticeMask(*c, adding);
  96
  97                                                 output += *c;
  98                                         }
  99                                 }
 100                                 else
 101                                         this->WriteNumeric(ERR_UNKNOWNSNOMASK, "%s %c :is unknown snomask char to me", this->nick.c_str(), *c);
 102
 103                                 oldadding = adding;
 104                         break;
 105                 }
 106
 107                 *c++;
 108         }
 109
 110         std::string s = this->FormatNoticeMasks();
 111         if (s.length() == 0)
 112         {
 113                 this->modes[UM_SNOMASK] = false;
 114         }
 115
 116         return output;
 117 }
 118
 119 void User::StartDNSLookup()
 120 {
 121         try
 122         {
 123                 bool cached = false;
 124                 const char* sip = this->GetIPString();
 125                 UserResolver *res_reverse;
 126
 127                 QueryType resolvtype = this->client_sa.sa.sa_family == AF_INET6 ? DNS_QUERY_PTR6 : DNS_QUERY_PTR4;
 128                 res_reverse = new UserResolver(this, sip, resolvtype, cached);
 129
 130                 ServerInstance->AddResolver(res_reverse, cached);
 131         }
 132         catch (CoreException& e)
 133         {
 134                 ServerInstance->Logs->Log("USERS", DEBUG,"Error in resolver: %s",e.GetReason());
 135         }
 136 }
 137
 138 bool User::IsNoticeMaskSet(unsigned char sm)
 139 {
 140         if (!isalpha(sm))
 141                 return false;
 142         return (snomasks[sm-65]);
 143 }
 144
 145 void User::SetNoticeMask(unsigned char sm, bool value)
 146 {
 147         if (!isalpha(sm))
 148                 return;
 149         snomasks[sm-65] = value;
 150 }
 151
 152 const char* User::FormatNoticeMasks()
 153 {
 154         static char data[MAXBUF];
 155         int offset = 0;
 156
 157         for (int n = 0; n < 64; n++)
 158         {
 159                 if (snomasks[n])
 160                         data[offset++] = n+65;
 161         }
 162
 163         data[offset] = 0;
 164         return data;
 165 }
 166
 167 bool User::IsModeSet(unsigned char m)
 168 {
 169         if (!isalpha(m))
 170                 return false;
 171         return (modes[m-65]);
 172 }
 173
 174 void User::SetMode(unsigned char m, bool value)
 175 {
 176         if (!isalpha(m))
 177                 return;
 178         modes[m-65] = value;
 179 }
 180
 181 const char* User::FormatModes(bool showparameters)
 182 {
 183         static char data[MAXBUF];
 184         std::string params;
 185         int offset = 0;
 186
 187         for (unsigned char n = 0; n < 64; n++)
 188         {
 189                 if (modes[n])
 190                 {
 191                         data[offset++] = n + 65;
 192                         ModeHandler* mh = ServerInstance->Modes->FindMode(n + 65, MODETYPE_USER);
 193                         if (showparameters && mh && mh->GetNumParams(true))
 194                         {
 195                                 std::string p = mh->GetUserParameter(this);
 196                                 if (p.length())
 197                                         params.append(" ").append(p);
 198                         }
 199                 }
 200         }
 201         data[offset] = 0;
 202         strlcat(data, params.c_str(), MAXBUF);
 203         return data;
 204 }
 205
 206 void User::DecrementModes()
 207 {
 208         ServerInstance->Logs->Log("USERS", DEBUG, "DecrementModes()");
 209         for (unsigned char n = 'A'; n <= 'z'; n++)
 210         {
 211                 if (modes[n-65])
 212                 {
 213                         ServerInstance->Logs->Log("USERS", DEBUG,"DecrementModes() found mode %c", n);
 214                         ModeHandler* mh = ServerInstance->Modes->FindMode(n, MODETYPE_USER);
 215                         if (mh)
 216                         {
 217                                 ServerInstance->Logs->Log("USERS", DEBUG,"Found handler %c and call ChangeCount", n);
 218                                 mh->ChangeCount(-1);
 219                         }
 220                 }
 221         }
 222 }
 223
 224 User::User(const std::string &uid)
 225 {
 226         server = ServerInstance->Config->ServerName;
 227         age = ServerInstance->Time();
 228         Penalty = 0;
 229         lastping = signon = idle_lastmsg = nping = registered = 0;
 230         bytes_in = bytes_out = cmds_in = cmds_out = 0;
 231         quietquit = quitting = exempt = dns_done = false;
 232         fd = -1;
 233         server_sa.sa.sa_family = AF_UNSPEC;
 234         client_sa.sa.sa_family = AF_UNSPEC;
 235         AllowedPrivs = AllowedOperCommands = NULL;
 236
 237         if (uid.empty())
 238                 uuid = ServerInstance->GetUID();
 239         else
 240                 uuid = uid;
 241
 242         ServerInstance->Logs->Log("USERS", DEBUG,"New UUID for user: %s (%s)", uuid.c_str(), uid.empty() ? "allocated new" : "used remote");
 243
 244         user_hash::iterator finduuid = ServerInstance->Users->uuidlist->find(uuid);
 245         if (finduuid == ServerInstance->Users->uuidlist->end())
 246                 (*ServerInstance->Users->uuidlist)[uuid] = this;
 247         else
 248                 throw CoreException("Duplicate UUID "+std::string(uuid)+" in User constructor");
 249 }
 250
 251 User::~User()
 252 {
 253         if (uuid.length())
 254                 ServerInstance->Logs->Log("USERS", ERROR, "User destructor for %s called without cull", uuid.c_str());
 255 }
 256
 257 const std::string& User::MakeHost()
 258 {
 259         if (!this->cached_makehost.empty())
 260                 return this->cached_makehost;
 261
 262         char nhost[MAXBUF];
 263         /* This is much faster than snprintf */
 264         char* t = nhost;
 265         for(const char* n = ident.c_str(); *n; n++)
 266                 *t++ = *n;
 267         *t++ = '@';
 268         for(const char* n = host.c_str(); *n; n++)
 269                 *t++ = *n;
 270         *t = 0;
 271
 272         this->cached_makehost.assign(nhost);
 273
 274         return this->cached_makehost;
 275 }
 276
 277 const std::string& User::MakeHostIP()
 278 {
 279         if (!this->cached_hostip.empty())
 280                 return this->cached_hostip;
 281
 282         char ihost[MAXBUF];
 283         /* This is much faster than snprintf */
 284         char* t = ihost;
 285         for(const char* n = ident.c_str(); *n; n++)
 286                 *t++ = *n;
 287         *t++ = '@';
 288         for(const char* n = this->GetIPString(); *n; n++)
 289                 *t++ = *n;
 290         *t = 0;
 291
 292         this->cached_hostip = ihost;
 293
 294         return this->cached_hostip;
 295 }
 296
 297 const std::string User::GetFullHost()
 298 {
 299         if (!this->cached_fullhost.empty())
 300                 return this->cached_fullhost;
 301
 302         char result[MAXBUF];
 303         char* t = result;
 304         for(const char* n = nick.c_str(); *n; n++)
 305                 *t++ = *n;
 306         *t++ = '!';
 307         for(const char* n = ident.c_str(); *n; n++)
 308                 *t++ = *n;
 309         *t++ = '@';
 310         for(const char* n = dhost.c_str(); *n; n++)
 311                 *t++ = *n;
 312         *t = 0;
 313
 314         this->cached_fullhost = result;
 315
 316         return this->cached_fullhost;
 317 }
 318
 319 char* User::MakeWildHost()
 320 {
 321         static char nresult[MAXBUF];
 322         char* t = nresult;
 323         *t++ = '*';     *t++ = '!';
 324         *t++ = '*';     *t++ = '@';
 325         for(const char* n = dhost.c_str(); *n; n++)
 326                 *t++ = *n;
 327         *t = 0;
 328         return nresult;
 329 }
 330
 331 const std::string User::GetFullRealHost()
 332 {
 333         if (!this->cached_fullrealhost.empty())
 334                 return this->cached_fullrealhost;
 335
 336         char fresult[MAXBUF];
 337         char* t = fresult;
 338         for(const char* n = nick.c_str(); *n; n++)
 339                 *t++ = *n;
 340         *t++ = '!';
 341         for(const char* n = ident.c_str(); *n; n++)
 342                 *t++ = *n;
 343         *t++ = '@';
 344         for(const char* n = host.c_str(); *n; n++)
 345                 *t++ = *n;
 346         *t = 0;
 347
 348         this->cached_fullrealhost = fresult;
 349
 350         return this->cached_fullrealhost;
 351 }
 352
 353 bool User::IsInvited(const irc::string &channel)
 354 {
 355         time_t now = ServerInstance->Time();
 356         InvitedList::iterator safei;
 357         for (InvitedList::iterator i = invites.begin(); i != invites.end(); ++i)
 358         {
 359                 if (channel == i->first)
 360                 {
 361                         if (i->second != 0 && now > i->second)
 362                         {
 363                                 /* Expired invite, remove it. */
 364                                 safei = i;
 365                                 --i;
 366                                 invites.erase(safei);
 367                                 continue;
 368                         }
 369                         return true;
 370                 }
 371         }
 372         return false;
 373 }
 374
 375 InvitedList* User::GetInviteList()
 376 {
 377         time_t now = ServerInstance->Time();
 378         /* Weed out expired invites here. */
 379         InvitedList::iterator safei;
 380         for (InvitedList::iterator i = invites.begin(); i != invites.end(); ++i)
 381         {
 382                 if (i->second != 0 && now > i->second)
 383                 {
 384                         /* Expired invite, remove it. */
 385                         safei = i;
 386                         --i;
 387                         invites.erase(safei);
 388                 }
 389         }
 390         return &invites;
 391 }
 392
 393 void User::InviteTo(const irc::string &channel, time_t invtimeout)
 394 {
 395         time_t now = ServerInstance->Time();
 396         if (invtimeout != 0 && now > invtimeout) return; /* Don't add invites that are expired from the get-go. */
 397         for (InvitedList::iterator i = invites.begin(); i != invites.end(); ++i)
 398         {
 399                 if (channel == i->first)
 400                 {
 401                         if (i->second != 0 && invtimeout > i->second)
 402                         {
 403                                 i->second = invtimeout;
 404                         }
 405
 406                         return;
 407                 }
 408         }
 409         invites.push_back(std::make_pair(channel, invtimeout));
 410 }
 411
 412 void User::RemoveInvite(const irc::string &channel)
 413 {
 414         for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
 415         {
 416                 if (channel == i->first)
 417                 {
 418                         invites.erase(i);
 419                         return;
 420                 }
 421         }
 422 }
 423
 424 bool User::HasModePermission(unsigned char mode, ModeType type)
 425 {
 426         if (!IS_LOCAL(this))
 427                 return true;
 428
 429         if (!IS_OPER(this))
 430                 return false;
 431
 432         if (mode < 'A' || mode > ('A' + 64)) return false;
 433
 434         return ((type == MODETYPE_USER ? AllowedUserModes : AllowedChanModes))[(mode - 'A')];
 435
 436 }
 437
 438 bool User::HasPermission(const std::string &command)
 439 {
 440         /*
 441          * users on remote servers can completely bypass all permissions based checks.
 442          * This prevents desyncs when one server has different type/class tags to another.
 443          * That having been said, this does open things up to the possibility of source changes
 444          * allowing remote kills, etc - but if they have access to the src, they most likely have
 445          * access to the conf - so it's an end to a means either way.
 446          */
 447         if (!IS_LOCAL(this))
 448                 return true;
 449
 450         // are they even an oper at all?
 451         if (!IS_OPER(this))
 452         {
 453                 return false;
 454         }
 455
 456         if (!AllowedOperCommands)
 457                 return false;
 458
 459         if (AllowedOperCommands->find(command) != AllowedOperCommands->end())
 460                 return true;
 461         else if (AllowedOperCommands->find("*") != AllowedOperCommands->end())
 462                 return true;
 463
 464         return false;
 465 }
 466
 467
 468 bool User::HasPrivPermission(const std::string &privstr, bool noisy)
 469 {
 470         if (!IS_LOCAL(this))
 471         {
 472                 ServerInstance->Logs->Log("PRIVS", DEBUG, "Remote (yes)");
 473                 return true;
 474         }
 475
 476         if (!IS_OPER(this))
 477         {
 478                 if (noisy)
 479                         this->WriteServ("NOTICE %s :You are not an oper", this->nick.c_str());
 480                 return false;
 481         }
 482
 483         if (!AllowedPrivs)
 484         {
 485                 if (noisy)
 486                         this->WriteServ("NOTICE %s :Privset empty(!?)", this->nick.c_str());
 487                 return false;
 488         }
 489
 490         if (AllowedPrivs->find(privstr) != AllowedPrivs->end())
 491         {
 492                 return true;
 493         }
 494         else if (AllowedPrivs->find("*") != AllowedPrivs->end())
 495         {
 496                 return true;
 497         }
 498
 499         if (noisy)
 500                 this->WriteServ("NOTICE %s :Oper type %s does not have access to priv %s", this->nick.c_str(), this->oper.c_str(), privstr.c_str());
 501         return false;
 502 }
 503
 504 void User::OnDataReady()
 505 {
 506         if (quitting)
 507                 return;
 508
 509         if (MyClass && recvq.length() > MyClass->GetRecvqMax() && !HasPrivPermission("users/flood/increased-buffers"))
 510         {
 511                 ServerInstance->Users->QuitUser(this, "RecvQ exceeded");
 512                 ServerInstance->SNO->WriteToSnoMask('a', "User %s RecvQ of %lu exceeds connect class maximum of %lu",
 513                         nick.c_str(), (unsigned long)recvq.length(), MyClass->GetRecvqMax());
 514         }
 515         unsigned long sendqmax = ULONG_MAX;
 516         if (MyClass && !HasPrivPermission("users/flood/increased-buffers"))
 517                 sendqmax = MyClass->GetSendqSoftMax();
 518
 519         while (Penalty < 10 && getSendQSize() < sendqmax)
 520         {
 521                 std::string line;
 522                 line.reserve(MAXBUF);
 523                 std::string::size_type qpos = 0;
 524                 while (qpos < recvq.length())
 525                 {
 526                         char c = recvq[qpos++];
 527                         switch (c)
 528                         {
 529                         case '\0':
 530                                 c = ' ';
 531                                 break;
 532                         case '\r':
 533                                 continue;
 534                         case '\n':
 535                                 goto eol_found;
 536                         }
 537                         if (line.length() < MAXBUF - 2)
 538                                 line.push_back(c);
 539                 }
 540                 // if we got here, the recvq ran out before we found a newline
 541                 return;
 542 eol_found:
 543                 // just found a newline. Terminate the string, and pull it out of recvq
 544                 recvq = recvq.substr(qpos);
 545
 546                 // TODO should this be moved to when it was inserted in recvq?
 547                 ServerInstance->stats->statsRecv += qpos;
 548                 this->bytes_in += qpos;
 549                 this->cmds_in++;
 550
 551                 ServerInstance->Parser->ProcessBuffer(line, this);
 552         }
 553         // Add pseudo-penalty so that we continue processing after sendq recedes
 554         if (Penalty == 0 && getSendQSize() >= sendqmax)
 555                 Penalty++;
 556 }
 557
 558 void User::AddWriteBuf(const std::string &data)
 559 {
 560         // Don't bother sending text to remote users!
 561         if (IS_REMOTE(this))
 562                 return;
 563         if (!quitting && MyClass && getSendQSize() + data.length() > MyClass->GetSendqHardMax() && !HasPrivPermission("users/flood/increased-buffers"))
 564         {
 565                 /*
 566                  * Quit the user FIRST, because otherwise we could recurse
 567                  * here and hit the same limit.
 568                  */
 569                 ServerInstance->Users->QuitUser(this, "SendQ exceeded");
 570                 ServerInstance->SNO->WriteToSnoMask('a', "User %s SendQ exceeds connect class maximum of %lu",
 571                         nick.c_str(), MyClass->GetSendqHardMax());
 572                 return;
 573         }
 574
 575         // We still want to append data to the sendq of a quitting user,
 576         // e.g. their ERROR message that says 'closing link'
 577
 578         WriteData(data);
 579 }
 580
 581 void User::OnError(BufferedSocketError)
 582 {
 583         ServerInstance->Users->QuitUser(this, getError());
 584 }
 585
 586 bool User::cull()
 587 {
 588         if (!quitting)
 589                 ServerInstance->Users->QuitUser(this, "Culled without QuitUser");
 590         if (uuid.empty())
 591         {
 592                 ServerInstance->Logs->Log("USERS", DEBUG, "User culled twice? UUID empty");
 593                 return true;
 594         }
 595         PurgeEmptyChannels();
 596         if (IS_LOCAL(this))
 597         {
 598                 if (fd != INT_MAX)
 599                         Close();
 600
 601                 std::vector<User*>::iterator x = find(ServerInstance->Users->local_users.begin(),ServerInstance->Users->local_users.end(),this);
 602                 if (x != ServerInstance->Users->local_users.end())
 603                         ServerInstance->Users->local_users.erase(x);
 604                 else
 605                         ServerInstance->Logs->Log("USERS", DEBUG, "Failed to remove user from vector");
 606         }
 607
 608         if (this->AllowedOperCommands)
 609         {
 610                 delete AllowedOperCommands;
 611                 AllowedOperCommands = NULL;
 612         }
 613
 614         if (this->AllowedPrivs)
 615         {
 616                 delete AllowedPrivs;
 617                 AllowedPrivs = NULL;
 618         }
 619
 620         this->InvalidateCache();
 621         this->DecrementModes();
 622
 623         if (client_sa.sa.sa_family != AF_UNSPEC)
 624                 ServerInstance->Users->RemoveCloneCounts(this);
 625
 626         ServerInstance->Users->uuidlist->erase(uuid);
 627         uuid.clear();
 628         return true;
 629 }
 630
 631 void User::Oper(const std::string &opertype, const std::string &opername)
 632 {
 633         if (this->IsModeSet('o'))
 634                 this->UnOper();
 635
 636         this->modes[UM_OPERATOR] = 1;
 637         this->WriteServ("MODE %s :+o", this->nick.c_str());
 638         FOREACH_MOD(I_OnOper, OnOper(this, opertype));
 639
 640         ServerInstance->SNO->WriteToSnoMask('o',"%s (%s@%s) is now an IRC operator of type %s (using oper '%s')", this->nick.c_str(), this->ident.c_str(), this->host.c_str(), irc::Spacify(opertype.c_str()), opername.c_str());
 641         this->WriteNumeric(381, "%s :You are now %s %s", this->nick.c_str(), strchr("aeiouAEIOU", *opertype.c_str()) ? "an" : "a", irc::Spacify(opertype.c_str()));
 642
 643         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());
 644         this->oper.assign(opertype, 0, 512);
 645         ServerInstance->Users->all_opers.push_back(this);
 646
 647         /*
 648          * This might look like it's in the wrong place.
 649          * It is *not*!
 650          *
 651          * For multi-network servers, we may not have the opertypes of the remote server, but we still want to mark the user as an oper of that type.
 652          * -- w00t
 653          */
 654         TagIndex::iterator iter_opertype = ServerInstance->Config->opertypes.find(this->oper.c_str());
 655         if (iter_opertype != ServerInstance->Config->opertypes.end())
 656         {
 657                 if (AllowedOperCommands)
 658                         AllowedOperCommands->clear();
 659                 else
 660                         AllowedOperCommands = new std::set<std::string>;
 661
 662                 if (AllowedPrivs)
 663                         AllowedPrivs->clear();
 664                 else
 665                         AllowedPrivs = new std::set<std::string>;
 666
 667                 AllowedUserModes.reset();
 668                 AllowedChanModes.reset();
 669                 this->AllowedUserModes['o' - 'A'] = true; // Call me paranoid if you want.
 670
 671                 std::string myclass, mycmd, mypriv;
 672                 irc::spacesepstream Classes(iter_opertype->second->getString("classes"));
 673                 while (Classes.GetToken(myclass))
 674                 {
 675                         TagIndex::iterator iter_operclass = ServerInstance->Config->operclass.find(myclass.c_str());
 676                         if (iter_operclass != ServerInstance->Config->operclass.end())
 677                         {
 678                                 /* Process commands */
 679                                 irc::spacesepstream CommandList(iter_operclass->second->getString("commands"));
 680                                 while (CommandList.GetToken(mycmd))
 681                                 {
 682                                         this->AllowedOperCommands->insert(mycmd);
 683                                 }
 684
 685                                 irc::spacesepstream PrivList(iter_operclass->second->getString("privs"));
 686                                 while (PrivList.GetToken(mypriv))
 687                                 {
 688                                         this->AllowedPrivs->insert(mypriv);
 689                                 }
 690
 691                                 for (unsigned char* c = (unsigned char*)iter_operclass->second->getString("usermodes").c_str(); *c; ++c)
 692                                 {
 693                                         if (*c == '*')
 694                                         {
 695                                                 this->AllowedUserModes.set();
 696                                         }
 697                                         else
 698                                         {
 699                                                 this->AllowedUserModes[*c - 'A'] = true;
 700                                         }
 701                                 }
 702
 703                                 for (unsigned char* c = (unsigned char*)iter_operclass->second->getString("chanmodes").c_str(); *c; ++c)
 704                                 {
 705                                         if (*c == '*')
 706                                         {
 707                                                 this->AllowedChanModes.set();
 708                                         }
 709                                         else
 710                                         {
 711                                                 this->AllowedChanModes[*c - 'A'] = true;
 712                                         }
 713                                 }
 714                         }
 715                 }
 716         }
 717
 718         FOREACH_MOD(I_OnPostOper,OnPostOper(this, opertype, opername));
 719 }
 720
 721 void User::UnOper()
 722 {
 723         if (IS_OPER(this))
 724         {
 725                 /*
 726                  * unset their oper type (what IS_OPER checks).
 727                  * note, order is important - this must come before modes as -o attempts
 728                  * to call UnOper. -- w00t
 729                  */
 730                 this->oper.clear();
 731
 732
 733                 /* Remove all oper only modes from the user when the deoper - Bug #466*/
 734                 std::string moderemove("-");
 735
 736                 for (unsigned char letter = 'A'; letter <= 'z'; letter++)
 737                 {
 738                         ModeHandler* mh = ServerInstance->Modes->FindMode(letter, MODETYPE_USER);
 739                         if (mh && mh->NeedsOper())
 740                                 moderemove += letter;
 741                 }
 742
 743
 744                 std::vector<std::string> parameters;
 745                 parameters.push_back(this->nick);
 746                 parameters.push_back(moderemove);
 747
 748                 ServerInstance->Parser->CallHandler("MODE", parameters, this);
 749
 750                 /* remove the user from the oper list. Will remove multiple entries as a safeguard against bug #404 */
 751                 ServerInstance->Users->all_opers.remove(this);
 752
 753                 if (AllowedOperCommands)
 754                 {
 755                         delete AllowedOperCommands;
 756                         AllowedOperCommands = NULL;
 757                 }
 758
 759                 if (AllowedPrivs)
 760                 {
 761                         delete AllowedPrivs;
 762                         AllowedPrivs = NULL;
 763                 }
 764
 765                 AllowedUserModes.reset();
 766                 AllowedChanModes.reset();
 767                 this->modes[UM_OPERATOR] = 0;
 768         }
 769 }
 770
 771 /* adds or updates an entry in the whowas list */
 772 void User::AddToWhoWas()
 773 {
 774         Module* whowas = ServerInstance->Modules->Find("cmd_whowas.so");
 775         if (whowas)
 776         {
 777                 WhowasRequest req(NULL, whowas, WhowasRequest::WHOWAS_ADD);
 778                 req.user = this;
 779                 req.Send();
 780         }
 781 }
 782
 783 /*
 784  * Check class restrictions
 785  */
 786 void User::CheckClass()
 787 {
 788         ConnectClass* a = this->MyClass;
 789
 790         if ((!a) || (a->type == CC_DENY))
 791         {
 792                 ServerInstance->Users->QuitUser(this, "Unauthorised connection");
 793                 return;
 794         }
 795         else if ((a->GetMaxLocal()) && (ServerInstance->Users->LocalCloneCount(this) > a->GetMaxLocal()))
 796         {
 797                 ServerInstance->Users->QuitUser(this, "No more connections allowed from your host via this connect class (local)");
 798                 ServerInstance->SNO->WriteToSnoMask('a', "WARNING: maximum LOCAL connections (%ld) exceeded for IP %s", a->GetMaxLocal(), this->GetIPString());
 799                 return;
 800         }
 801         else if ((a->GetMaxGlobal()) && (ServerInstance->Users->GlobalCloneCount(this) > a->GetMaxGlobal()))
 802         {
 803                 ServerInstance->Users->QuitUser(this, "No more connections allowed from your host via this connect class (global)");
 804                 ServerInstance->SNO->WriteToSnoMask('a', "WARNING: maximum GLOBAL connections (%ld) exceeded for IP %s", a->GetMaxGlobal(), this->GetIPString());
 805                 return;
 806         }
 807
 808         this->nping = ServerInstance->Time() + a->GetPingTime() + ServerInstance->Config->dns_timeout;
 809 }
 810
 811 bool User::CheckLines(bool doZline)
 812 {
 813         const char* check[] = { "G" , "K", (doZline) ? "Z" : NULL, NULL };
 814
 815         if (!this->exempt)
 816         {
 817                 for (int n = 0; check[n]; ++n)
 818                 {
 819                         XLine *r = ServerInstance->XLines->MatchesLine(check[n], this);
 820
 821                         if (r)
 822                         {
 823                                 r->Apply(this);
 824                                 return true;
 825                         }
 826                 }
 827         }
 828
 829         return false;
 830 }
 831
 832 void User::FullConnect()
 833 {
 834         ServerInstance->stats->statsConnects++;
 835         this->idle_lastmsg = ServerInstance->Time();
 836
 837         /*
 838          * You may be thinking "wtf, we checked this in User::AddClient!" - and yes, we did, BUT.
 839          * At the time AddClient is called, we don't have a resolved host, by here we probably do - which
 840          * may put the user into a totally seperate class with different restrictions! so we *must* check again.
 841          * Don't remove this! -- w00t
 842          */
 843         this->SetClass();
 844
 845         /* Check the password, if one is required by the user's connect class.
 846          * This CANNOT be in CheckClass(), because that is called prior to PASS as well!
 847          */
 848         if (MyClass && !MyClass->pass.empty())
 849         {
 850                 if (ServerInstance->PassCompare(this, MyClass->pass.c_str(), password.c_str(), MyClass->hash.c_str()))
 851                 {
 852                         ServerInstance->Users->QuitUser(this, "Invalid password");
 853                         return;
 854                 }
 855         }
 856
 857         if (this->CheckLines())
 858                 return;
 859
 860         this->WriteServ("NOTICE Auth :Welcome to \002%s\002!",ServerInstance->Config->Network.c_str());
 861         this->WriteNumeric(RPL_WELCOME, "%s :Welcome to the %s IRC Network %s!%s@%s",this->nick.c_str(), ServerInstance->Config->Network.c_str(), this->nick.c_str(), this->ident.c_str(), this->host.c_str());
 862         this->WriteNumeric(RPL_YOURHOSTIS, "%s :Your host is %s, running version InspIRCd-2.0",this->nick.c_str(),ServerInstance->Config->ServerName.c_str());
 863         this->WriteNumeric(RPL_SERVERCREATED, "%s :This server was created %s %s", this->nick.c_str(), __TIME__, __DATE__);
 864         this->WriteNumeric(RPL_SERVERVERSION, "%s %s InspIRCd-2.0 %s %s %s", this->nick.c_str(), ServerInstance->Config->ServerName.c_str(), ServerInstance->Modes->UserModeList().c_str(), ServerInstance->Modes->ChannelModeList().c_str(), ServerInstance->Modes->ParaModeList().c_str());
 865
 866         ServerInstance->Config->Send005(this);
 867         this->WriteNumeric(RPL_YOURUUID, "%s %s :your unique ID", this->nick.c_str(), this->uuid.c_str());
 868
 869
 870         this->ShowMOTD();
 871
 872         /* Now registered */
 873         if (ServerInstance->Users->unregistered_count)
 874                 ServerInstance->Users->unregistered_count--;
 875
 876         /* Trigger LUSERS output, give modules a chance too */
 877         ModResult MOD_RESULT;
 878         std::string command("LUSERS");
 879         std::vector<std::string> parameters;
 880         FIRST_MOD_RESULT(OnPreCommand, MOD_RESULT, (command, parameters, this, true, "LUSERS"));
 881         if (!MOD_RESULT)
 882                 ServerInstance->CallCommandHandler(command, parameters, this);
 883
 884         /*
 885          * We don't set REG_ALL until triggering OnUserConnect, so some module events don't spew out stuff
 886          * for a user that doesn't exist yet.
 887          */
 888         FOREACH_MOD(I_OnUserConnect,OnUserConnect(this));
 889
 890         this->registered = REG_ALL;
 891
 892         FOREACH_MOD(I_OnPostConnect,OnPostConnect(this));
 893
 894         ServerInstance->SNO->WriteToSnoMask('c',"Client connecting on port %d: %s!%s@%s [%s] [%s]",
 895                 this->GetServerPort(), this->nick.c_str(), this->ident.c_str(), this->host.c_str(), this->GetIPString(), this->fullname.c_str());
 896         ServerInstance->Logs->Log("BANCACHE", DEBUG, "BanCache: Adding NEGATIVE hit for %s", this->GetIPString());
 897         ServerInstance->BanCache->AddHit(this->GetIPString(), "", "");
 898 }
 899
 900 /** User::UpdateNick()
 901  * re-allocates a nick in the user_hash after they change nicknames,
 902  * returns a pointer to the new user as it may have moved
 903  */
 904 User* User::UpdateNickHash(const char* New)
 905 {
 906         //user_hash::iterator newnick;
 907         user_hash::iterator oldnick = ServerInstance->Users->clientlist->find(this->nick);
 908
 909         if (!irc::string(this->nick.c_str()).compare(New))
 910                 return oldnick->second;
 911
 912         if (oldnick == ServerInstance->Users->clientlist->end())
 913                 return NULL; /* doesnt exist */
 914
 915         User* olduser = oldnick->second;
 916         ServerInstance->Users->clientlist->erase(oldnick);
 917         (*(ServerInstance->Users->clientlist))[New] = olduser;
 918         return olduser;
 919 }
 920
 921 void User::InvalidateCache()
 922 {
 923         /* Invalidate cache */
 924         cached_fullhost.clear();
 925         cached_hostip.clear();
 926         cached_makehost.clear();
 927         cached_fullrealhost.clear();
 928 }
 929
 930 bool User::ForceNickChange(const char* newnick)
 931 {
 932         ModResult MOD_RESULT;
 933
 934         this->InvalidateCache();
 935
 936         ServerInstance->NICKForced.set(this, 1);
 937         FIRST_MOD_RESULT(OnUserPreNick, MOD_RESULT, (this, newnick));
 938         ServerInstance->NICKForced.set(this, 0);
 939
 940         if (MOD_RESULT == MOD_RES_DENY)
 941         {
 942                 ServerInstance->stats->statsCollisions++;
 943                 return false;
 944         }
 945
 946         std::deque<classbase*> dummy;
 947         Command* nickhandler = ServerInstance->Parser->GetHandler("NICK");
 948         if (nickhandler) // wtfbbq, when would this not be here
 949         {
 950                 std::vector<std::string> parameters;
 951                 parameters.push_back(newnick);
 952                 ServerInstance->NICKForced.set(this, 1);
 953                 bool result = (ServerInstance->Parser->CallHandler("NICK", parameters, this) == CMD_SUCCESS);
 954                 ServerInstance->NICKForced.set(this, 0);
 955                 return result;
 956         }
 957
 958         // Unreachable, we hope
 959         return false;
 960 }
 961
 962 int User::GetServerPort()
 963 {
 964         switch (this->server_sa.sa.sa_family)
 965         {
 966                 case AF_INET6:
 967                         return htons(this->server_sa.in6.sin6_port);
 968                 case AF_INET:
 969                         return htons(this->server_sa.in4.sin_port);
 970         }
 971         return 0;
 972 }
 973
 974 const char* User::GetCIDRMask(int range)
 975 {
 976         static char buf[44];
 977
 978         if (range < 0)
 979                 throw "Negative range, sorry, no.";
 980
 981         /*
 982          * Original code written by Oliver Lupton (Om).
 983          * Integrated by me. Thanks. :) -- w00t
 984          */
 985         switch (this->client_sa.sa.sa_family)
 986         {
 987                 case AF_INET6:
 988                 {
 989                         /* unsigned char s6_addr[16]; */
 990                         struct in6_addr v6;
 991                         int i, bytestozero, extrabits;
 992                         char buffer[40];
 993
 994                         if(range > 128)
 995                                 throw "CIDR mask width greater than address width (IPv6, 128 bit)";
 996
 997                         /* To create the CIDR mask we want to set all the bits after 'range' bits of the address
 998                          * to zero. This means the last (128 - range) bits of the address must be set to zero.
 999                          * Hence this number divided by 8 is the number of whole bytes from the end of the address
1000                          * which must be set to zero.
1001                          */
1002                         bytestozero = (128 - range) / 8;
1003
1004                         /* Some of the least significant bits of the next most significant byte may also have to
1005                          * be zeroed. The number of bits is the remainder of the above division.
1006                          */
1007                         extrabits = (128 - range) % 8;
1008
1009                         /* Populate our working struct with the parts of the user's IP which are required in the
1010                          * final CIDR mask. Set all the subsequent bytes to zero.
1011                          * (16 - bytestozero) is the number of bytes which must be populated with actual IP data.
1012                          */
1013                         for(i = 0; i < (16 - bytestozero); i++)
1014                         {
1015                                 v6.s6_addr[i] = client_sa.in6.sin6_addr.s6_addr[i];
1016                         }
1017
1018                         /* And zero all the remaining bytes in the IP. */
1019                         for(; i < 16; i++)
1020                         {
1021                                 v6.s6_addr[i] = 0;
1022                         }
1023
1024                         /* And finally, zero the extra bits required. */
1025                         v6.s6_addr[15 - bytestozero] = (v6.s6_addr[15 - bytestozero] >> extrabits) << extrabits;
1026
1027                         snprintf(buf, 44, "%s/%d", inet_ntop(AF_INET6, &v6, buffer, 40), range);
1028                         return buf;
1029                 }
1030                 break;
1031                 case AF_INET:
1032                 {
1033                         struct in_addr v4;
1034                         char buffer[16];
1035
1036                         if (range > 32)
1037                                 throw "CIDR mask width greater than address width (IPv4, 32 bit)";
1038
1039                         /* Users already have a sockaddr* pointer (User::ip) which contains either a v4 or v6 structure */
1040                         v4.s_addr = client_sa.in4.sin_addr.s_addr;
1041
1042                         /* To create the CIDR mask we want to set all the bits after 'range' bits of the address
1043                          * to zero. This means the last (32 - range) bits of the address must be set to zero.
1044                          * This is done by shifting the value right and then back left by (32 - range) bits.
1045                          */
1046                         if(range > 0)
1047                         {
1048                                 v4.s_addr = ntohl(v4.s_addr);
1049                                 v4.s_addr = (v4.s_addr >> (32 - range)) << (32 - range);
1050                                 v4.s_addr = htonl(v4.s_addr);
1051                         }
1052                         else
1053                         {
1054                                 /* a range of zero would cause a 32 bit value to be shifted by 32 bits.
1055                                  * this has undefined behaviour, but for CIDR purposes the resulting mask
1056                                  * from a.b.c.d/0 is 0.0.0.0/0
1057                                  */
1058                                 v4.s_addr = 0;
1059                         }
1060
1061                         snprintf(buf, 44, "%s/%d", inet_ntop(AF_INET, &v4, buffer, 16), range);
1062                         return buf;
1063                 }
1064                 break;
1065         }
1066
1067         return ""; // unused, but oh well
1068 }
1069
1070 const char* User::GetIPString()
1071 {
1072         int port;
1073         if (cachedip.empty())
1074         {
1075                 irc::sockets::satoap(&client_sa, cachedip, port);
1076                 /* IP addresses starting with a : on irc are a Bad Thing (tm) */
1077                 if (cachedip.c_str()[0] == ':')
1078                         cachedip.insert(0,1,'0');
1079         }
1080
1081         return cachedip.c_str();
1082 }
1083
1084 bool User::SetClientIP(const char* sip)
1085 {
1086         this->cachedip = "";
1087         return irc::sockets::aptosa(sip, 0, &client_sa);
1088 }
1089
1090 static std::string wide_newline("\r\n");
1091
1092 void User::Write(const std::string& text)
1093 {
1094         if (!ServerInstance->SE->BoundsCheckFd(this))
1095                 return;
1096
1097         if (text.length() > MAXBUF - 2)
1098         {
1099                 // this should happen rarely or never. Crop the string at 512 and try again.
1100                 std::string try_again = text.substr(0, MAXBUF - 2);
1101                 Write(try_again);
1102                 return;
1103         }
1104
1105         ServerInstance->Logs->Log("USEROUTPUT", DEBUG,"C[%d] O %s", this->GetFd(), text.c_str());
1106
1107         this->AddWriteBuf(text);
1108         this->AddWriteBuf(wide_newline);
1109
1110         ServerInstance->stats->statsSent += text.length() + 2;
1111         this->bytes_out += text.length() + 2;
1112         this->cmds_out++;
1113 }
1114
1115 /** Write()
1116  */
1117 void User::Write(const char *text, ...)
1118 {
1119         va_list argsPtr;
1120         char textbuffer[MAXBUF];
1121
1122         va_start(argsPtr, text);
1123         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1124         va_end(argsPtr);
1125
1126         this->Write(std::string(textbuffer));
1127 }
1128
1129 void User::WriteServ(const std::string& text)
1130 {
1131         this->Write(":%s %s",ServerInstance->Config->ServerName.c_str(),text.c_str());
1132 }
1133
1134 /** WriteServ()
1135  *  Same as Write(), except `text' is prefixed with `:server.name '.
1136  */
1137 void User::WriteServ(const char* text, ...)
1138 {
1139         va_list argsPtr;
1140         char textbuffer[MAXBUF];
1141
1142         va_start(argsPtr, text);
1143         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1144         va_end(argsPtr);
1145
1146         this->WriteServ(std::string(textbuffer));
1147 }
1148
1149
1150 void User::WriteNumeric(unsigned int numeric, const char* text, ...)
1151 {
1152         va_list argsPtr;
1153         char textbuffer[MAXBUF];
1154
1155         va_start(argsPtr, text);
1156         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1157         va_end(argsPtr);
1158
1159         this->WriteNumeric(numeric, std::string(textbuffer));
1160 }
1161
1162 void User::WriteNumeric(unsigned int numeric, const std::string &text)
1163 {
1164         char textbuffer[MAXBUF];
1165         ModResult MOD_RESULT;
1166
1167         FIRST_MOD_RESULT(OnNumeric, MOD_RESULT, (this, numeric, text));
1168
1169         if (MOD_RESULT == MOD_RES_DENY)
1170                 return;
1171
1172         snprintf(textbuffer,MAXBUF,":%s %03u %s",ServerInstance->Config->ServerName.c_str(), numeric, text.c_str());
1173         this->Write(std::string(textbuffer));
1174 }
1175
1176 void User::WriteFrom(User *user, const std::string &text)
1177 {
1178         char tb[MAXBUF];
1179
1180         snprintf(tb,MAXBUF,":%s %s",user->GetFullHost().c_str(),text.c_str());
1181
1182         this->Write(std::string(tb));
1183 }
1184
1185
1186 /* write text from an originating user to originating user */
1187
1188 void User::WriteFrom(User *user, const char* text, ...)
1189 {
1190         va_list argsPtr;
1191         char textbuffer[MAXBUF];
1192
1193         va_start(argsPtr, text);
1194         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1195         va_end(argsPtr);
1196
1197         this->WriteFrom(user, std::string(textbuffer));
1198 }
1199
1200
1201 /* write text to an destination user from a source user (e.g. user privmsg) */
1202
1203 void User::WriteTo(User *dest, const char *data, ...)
1204 {
1205         char textbuffer[MAXBUF];
1206         va_list argsPtr;
1207
1208         va_start(argsPtr, data);
1209         vsnprintf(textbuffer, MAXBUF, data, argsPtr);
1210         va_end(argsPtr);
1211
1212         this->WriteTo(dest, std::string(textbuffer));
1213 }
1214
1215 void User::WriteTo(User *dest, const std::string &data)
1216 {
1217         dest->WriteFrom(this, data);
1218 }
1219
1220 void User::WriteCommon(const char* text, ...)
1221 {
1222         char textbuffer[MAXBUF];
1223         va_list argsPtr;
1224
1225         if (this->registered != REG_ALL || quitting)
1226                 return;
1227
1228         int len = snprintf(textbuffer,MAXBUF,":%s ",this->GetFullHost().c_str());
1229
1230         va_start(argsPtr, text);
1231         vsnprintf(textbuffer + len, MAXBUF - len, text, argsPtr);
1232         va_end(argsPtr);
1233
1234         this->WriteCommonRaw(std::string(textbuffer), true);
1235 }
1236
1237 void User::WriteCommonExcept(const char* text, ...)
1238 {
1239         char textbuffer[MAXBUF];
1240         va_list argsPtr;
1241
1242         if (this->registered != REG_ALL || quitting)
1243                 return;
1244
1245         int len = snprintf(textbuffer,MAXBUF,":%s ",this->GetFullHost().c_str());
1246
1247         va_start(argsPtr, text);
1248         vsnprintf(textbuffer + len, MAXBUF - len, text, argsPtr);
1249         va_end(argsPtr);
1250
1251         this->WriteCommonRaw(std::string(textbuffer), false);
1252 }
1253
1254 void User::WriteCommonRaw(const std::string &line, bool include_self)
1255 {
1256         if (this->registered != REG_ALL || quitting)
1257                 return;
1258
1259         uniq_id_t uniq_id = ++already_sent;
1260
1261         UserChanList include_c(chans);
1262         std::map<User*,bool> exceptions;
1263
1264         exceptions[this] = include_self;
1265
1266         FOREACH_MOD(I_OnBuildNeighborList,OnBuildNeighborList(this, include_c, exceptions));
1267
1268         for (std::map<User*,bool>::iterator i = exceptions.begin(); i != exceptions.end(); ++i)
1269         {
1270                 User* u = i->first;
1271                 if (IS_LOCAL(u) && !u->quitting)
1272                 {
1273                         already_sent[u->fd] = uniq_id;
1274                         if (i->second)
1275                                 u->Write(line);
1276                 }
1277         }
1278         for (UCListIter v = include_c.begin(); v != include_c.end(); ++v)
1279         {
1280                 Channel* c = *v;
1281                 const UserMembList* ulist = c->GetUsers();
1282                 for (UserMembList::const_iterator i = ulist->begin(); i != ulist->end(); i++)
1283                 {
1284                         User* u = i->first;
1285                         if (IS_LOCAL(u) && !u->quitting && already_sent[u->fd] != uniq_id)
1286                         {
1287                                 already_sent[u->fd] = uniq_id;
1288                                 u->Write(line);
1289                         }
1290                 }
1291         }
1292 }
1293
1294 void User::WriteCommonQuit(const std::string &normal_text, const std::string &oper_text)
1295 {
1296         char tb1[MAXBUF];
1297         char tb2[MAXBUF];
1298
1299         if (this->registered != REG_ALL)
1300                 return;
1301
1302         uniq_id_t uniq_id = ++already_sent;
1303
1304         snprintf(tb1,MAXBUF,":%s QUIT :%s",this->GetFullHost().c_str(),normal_text.c_str());
1305         snprintf(tb2,MAXBUF,":%s QUIT :%s",this->GetFullHost().c_str(),oper_text.c_str());
1306         std::string out1 = tb1;
1307         std::string out2 = tb2;
1308
1309         UserChanList include_c(chans);
1310         std::map<User*,bool> exceptions;
1311
1312         FOREACH_MOD(I_OnBuildNeighborList,OnBuildNeighborList(this, include_c, exceptions));
1313
1314         for (std::map<User*,bool>::iterator i = exceptions.begin(); i != exceptions.end(); ++i)
1315         {
1316                 User* u = i->first;
1317                 if (IS_LOCAL(u) && !u->quitting)
1318                 {
1319                         already_sent[u->fd] = uniq_id;
1320                         if (i->second)
1321                                 u->Write(IS_OPER(u) ? out2 : out1);
1322                 }
1323         }
1324         for (UCListIter v = include_c.begin(); v != include_c.end(); ++v)
1325         {
1326                 const UserMembList* ulist = (*v)->GetUsers();
1327                 for (UserMembList::const_iterator i = ulist->begin(); i != ulist->end(); i++)
1328                 {
1329                         User* u = i->first;
1330                         if (IS_LOCAL(u) && !u->quitting && (already_sent[u->fd] != uniq_id))
1331                         {
1332                                 already_sent[u->fd] = uniq_id;
1333                                 u->Write(IS_OPER(u) ? out2 : out1);
1334                         }
1335                 }
1336         }
1337 }
1338
1339 void User::WriteWallOps(const std::string &text)
1340 {
1341         std::string wallop("WALLOPS :");
1342         wallop.append(text);
1343
1344         for (std::vector<User*>::const_iterator i = ServerInstance->Users->local_users.begin(); i != ServerInstance->Users->local_users.end(); i++)
1345         {
1346                 User* t = *i;
1347                 if (t->IsModeSet('w'))
1348                         this->WriteTo(t,wallop);
1349         }
1350 }
1351
1352 void User::WriteWallOps(const char* text, ...)
1353 {
1354         if (!IS_LOCAL(this))
1355                 return;
1356
1357         char textbuffer[MAXBUF];
1358         va_list argsPtr;
1359
1360         va_start(argsPtr, text);
1361         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1362         va_end(argsPtr);
1363
1364         this->WriteWallOps(std::string(textbuffer));
1365 }
1366
1367 /* return 0 or 1 depending if users u and u2 share one or more common channels
1368  * (used by QUIT, NICK etc which arent channel specific notices)
1369  *
1370  * The old algorithm in 1.0 for this was relatively inefficient, iterating over
1371  * the first users channels then the second users channels within the outer loop,
1372  * therefore it was a maximum of x*y iterations (upon returning 0 and checking
1373  * all possible iterations). However this new function instead checks against the
1374  * channel's userlist in the inner loop which is a std::map<User*,User*>
1375  * and saves us time as we already know what pointer value we are after.
1376  * Don't quote me on the maths as i am not a mathematician or computer scientist,
1377  * but i believe this algorithm is now x+(log y) maximum iterations instead.
1378  */
1379 bool User::SharesChannelWith(User *other)
1380 {
1381         if ((!other) || (this->registered != REG_ALL) || (other->registered != REG_ALL))
1382                 return false;
1383
1384         /* Outer loop */
1385         for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1386         {
1387                 /* Eliminate the inner loop (which used to be ~equal in size to the outer loop)
1388                  * by replacing it with a map::find which *should* be more efficient
1389                  */
1390                 if ((*i)->HasUser(other))
1391                         return true;
1392         }
1393         return false;
1394 }
1395
1396 bool User::ChangeName(const char* gecos)
1397 {
1398         if (!this->fullname.compare(gecos))
1399                 return true;
1400
1401         if (IS_LOCAL(this))
1402         {
1403                 ModResult MOD_RESULT;
1404                 FIRST_MOD_RESULT(OnChangeLocalUserGECOS, MOD_RESULT, (this,gecos));
1405                 if (MOD_RESULT == MOD_RES_DENY)
1406                         return false;
1407                 FOREACH_MOD(I_OnChangeName,OnChangeName(this,gecos));
1408         }
1409         this->fullname.assign(gecos, 0, ServerInstance->Config->Limits.MaxGecos);
1410
1411         return true;
1412 }
1413
1414 void User::DoHostCycle(const std::string &quitline)
1415 {
1416         char buffer[MAXBUF];
1417
1418         if (!ServerInstance->Config->CycleHosts)
1419                 return;
1420
1421         uniq_id_t silent_id = ++already_sent;
1422         uniq_id_t seen_id = ++already_sent;
1423
1424         UserChanList include_c(chans);
1425         std::map<User*,bool> exceptions;
1426
1427         FOREACH_MOD(I_OnBuildNeighborList,OnBuildNeighborList(this, include_c, exceptions));
1428
1429         for (std::map<User*,bool>::iterator i = exceptions.begin(); i != exceptions.end(); ++i)
1430         {
1431                 User* u = i->first;
1432                 if (IS_LOCAL(u) && !u->quitting)
1433                 {
1434                         if (i->second)
1435                         {
1436                                 already_sent[u->fd] = seen_id;
1437                                 u->Write(quitline);
1438                         }
1439                         else
1440                         {
1441                                 already_sent[u->fd] = silent_id;
1442                         }
1443                 }
1444         }
1445         for (UCListIter v = include_c.begin(); v != include_c.end(); ++v)
1446         {
1447                 Channel* c = *v;
1448                 snprintf(buffer, MAXBUF, ":%s JOIN %s", GetFullHost().c_str(), c->name.c_str());
1449                 std::string joinline(buffer);
1450                 std::string modeline = ServerInstance->Modes->ModeString(this, c);
1451                 if (modeline.length() > 0)
1452                 {
1453                         snprintf(buffer, MAXBUF, ":%s MODE %s +%s", GetFullHost().c_str(), c->name.c_str(), modeline.c_str());
1454                         modeline = buffer;
1455                 }
1456
1457                 const UserMembList *ulist = c->GetUsers();
1458                 for (UserMembList::const_iterator i = ulist->begin(); i != ulist->end(); i++)
1459                 {
1460                         User* u = i->first;
1461                         if (u == this || !IS_LOCAL(u))
1462                                 continue;
1463                         if (already_sent[u->fd] == silent_id)
1464                                 continue;
1465
1466                         if (already_sent[u->fd] != seen_id)
1467                         {
1468                                 u->Write(quitline);
1469                                 already_sent[i->first->fd] = seen_id;
1470                         }
1471                         u->Write(joinline);
1472                         if (modeline.length() > 0)
1473                                 u->Write(modeline);
1474                 }
1475         }
1476 }
1477
1478 bool User::ChangeDisplayedHost(const char* shost)
1479 {
1480         if (dhost == shost)
1481                 return true;
1482
1483         if (IS_LOCAL(this))
1484         {
1485                 ModResult MOD_RESULT;
1486                 FIRST_MOD_RESULT(OnChangeLocalUserHost, MOD_RESULT, (this,shost));
1487                 if (MOD_RESULT == MOD_RES_DENY)
1488                         return false;
1489         }
1490
1491         FOREACH_MOD(I_OnChangeHost, OnChangeHost(this,shost));
1492
1493         std::string quitstr = ":" + GetFullHost() + " QUIT :Changing host";
1494
1495         /* Fix by Om: User::dhost is 65 long, this was truncating some long hosts */
1496         this->dhost.assign(shost, 0, 64);
1497
1498         this->InvalidateCache();
1499
1500         this->DoHostCycle(quitstr);
1501
1502         if (IS_LOCAL(this))
1503                 this->WriteNumeric(RPL_YOURDISPLAYEDHOST, "%s %s :is now your displayed host",this->nick.c_str(),this->dhost.c_str());
1504
1505         return true;
1506 }
1507
1508 bool User::ChangeIdent(const char* newident)
1509 {
1510         if (this->ident == newident)
1511                 return true;
1512
1513         FOREACH_MOD(I_OnChangeIdent, OnChangeIdent(this,newident));
1514
1515         std::string quitstr = ":" + GetFullHost() + " QUIT :Changing ident";
1516
1517         this->ident.assign(newident, 0, ServerInstance->Config->Limits.IdentMax + 1);
1518
1519         this->InvalidateCache();
1520
1521         this->DoHostCycle(quitstr);
1522
1523         return true;
1524 }
1525
1526 void User::SendAll(const char* command, const char* text, ...)
1527 {
1528         char textbuffer[MAXBUF];
1529         char formatbuffer[MAXBUF];
1530         va_list argsPtr;
1531
1532         va_start(argsPtr, text);
1533         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1534         va_end(argsPtr);
1535
1536         snprintf(formatbuffer,MAXBUF,":%s %s $* :%s", this->GetFullHost().c_str(), command, textbuffer);
1537         std::string fmt = formatbuffer;
1538
1539         for (std::vector<User*>::const_iterator i = ServerInstance->Users->local_users.begin(); i != ServerInstance->Users->local_users.end(); i++)
1540         {
1541                 (*i)->Write(fmt);
1542         }
1543 }
1544
1545
1546 std::string User::ChannelList(User* source, bool spy)
1547 {
1548         std::string list;
1549
1550         for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1551         {
1552                 Channel* c = *i;
1553                 /* If the target is the sender, neither +p nor +s is set, or
1554                  * the channel contains the user, it is not a spy channel
1555                  */
1556                 if (spy != (source == this || !(c->IsModeSet('p') || c->IsModeSet('s')) || c->HasUser(source)))
1557                         list.append(c->GetPrefixChar(this)).append(c->name).append(" ");
1558         }
1559
1560         return list;
1561 }
1562
1563 void User::SplitChanList(User* dest, const std::string &cl)
1564 {
1565         std::string line;
1566         std::ostringstream prefix;
1567         std::string::size_type start, pos, length;
1568
1569         prefix << this->nick << " " << dest->nick << " :";
1570         line = prefix.str();
1571         int namelen = ServerInstance->Config->ServerName.length() + 6;
1572
1573         for (start = 0; (pos = cl.find(' ', start)) != std::string::npos; start = pos+1)
1574         {
1575                 length = (pos == std::string::npos) ? cl.length() : pos;
1576
1577                 if (line.length() + namelen + length - start > 510)
1578                 {
1579                         ServerInstance->SendWhoisLine(this, dest, 319, "%s", line.c_str());
1580                         line = prefix.str();
1581                 }
1582
1583                 if(pos == std::string::npos)
1584                 {
1585                         line.append(cl.substr(start, length - start));
1586                         break;
1587                 }
1588                 else
1589                 {
1590                         line.append(cl.substr(start, length - start + 1));
1591                 }
1592         }
1593
1594         if (line.length())
1595         {
1596                 ServerInstance->SendWhoisLine(this, dest, 319, "%s", line.c_str());
1597         }
1598 }
1599
1600 /*
1601  * Sets a user's connection class.
1602  * If the class name is provided, it will be used. Otherwise, the class will be guessed using host/ip/ident/etc.
1603  * NOTE: If the <ALLOW> or <DENY> tag specifies an ip, and this user resolves,
1604  * then their ip will be taken as 'priority' anyway, so for example,
1605  * <connect allow="127.0.0.1"> will match joe!bloggs@localhost
1606  */
1607 ConnectClass* User::SetClass(const std::string &explicit_name)
1608 {
1609         ConnectClass *found = NULL;
1610
1611         if (!IS_LOCAL(this))
1612                 return NULL;
1613
1614         ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Setting connect class for UID %s", this->uuid.c_str());
1615
1616         if (!explicit_name.empty())
1617         {
1618                 for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++)
1619                 {
1620                         ConnectClass* c = *i;
1621
1622                         if (explicit_name == c->name)
1623                         {
1624                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Explicitly set to %s", explicit_name.c_str());
1625                                 found = c;
1626                         }
1627                 }
1628         }
1629         else
1630         {
1631                 for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++)
1632                 {
1633                         ConnectClass* c = *i;
1634
1635                         if (c->type == CC_ALLOW)
1636                         {
1637                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "ALLOW %s %d %s", c->host.c_str(), c->GetPort(), c->GetName().c_str());
1638                         }
1639                         else
1640                         {
1641                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "DENY %s %d %s", c->GetHost().c_str(), c->GetPort(), c->GetName().c_str());
1642                         }
1643
1644                         /* check if host matches.. */
1645                         if (c->GetHost().length() && !InspIRCd::MatchCIDR(this->GetIPString(), c->GetHost(), NULL) &&
1646                             !InspIRCd::MatchCIDR(this->host, c->GetHost(), NULL))
1647                         {
1648                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "No host match (for %s)", c->GetHost().c_str());
1649                                 continue;
1650                         }
1651
1652                         /*
1653                          * deny change if change will take class over the limit check it HERE, not after we found a matching class,
1654                          * because we should attempt to find another class if this one doesn't match us. -- w00t
1655                          */
1656                         if (c->limit && (c->GetReferenceCount() >= c->limit))
1657                         {
1658                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "OOPS: Connect class limit (%lu) hit, denying", c->limit);
1659                                 continue;
1660                         }
1661
1662                         /* if it requires a port ... */
1663                         if (c->GetPort())
1664                         {
1665                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Requires port (%d)", c->GetPort());
1666
1667                                 /* and our port doesn't match, fail. */
1668                                 if (this->GetServerPort() != c->GetPort())
1669                                 {
1670                                         ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Port match failed (%d)", this->GetServerPort());
1671                                         continue;
1672                                 }
1673                         }
1674
1675                         /* we stop at the first class that meets ALL critera. */
1676                         found = c;
1677                         break;
1678                 }
1679         }
1680
1681         /*
1682          * Okay, assuming we found a class that matches.. switch us into that class, keeping refcounts up to date.
1683          */
1684         if (found)
1685         {
1686                 MyClass = found;
1687         }
1688
1689         return this->MyClass;
1690 }
1691
1692 /* looks up a users password for their connection class (<ALLOW>/<DENY> tags)
1693  * NOTE: If the <ALLOW> or <DENY> tag specifies an ip, and this user resolves,
1694  * then their ip will be taken as 'priority' anyway, so for example,
1695  * <connect allow="127.0.0.1"> will match joe!bloggs@localhost
1696  */
1697 ConnectClass* User::GetClass()
1698 {
1699         return this->MyClass;
1700 }
1701
1702 void User::PurgeEmptyChannels()
1703 {
1704         std::vector<Channel*> to_delete;
1705
1706         // firstly decrement the count on each channel
1707         for (UCListIter f = this->chans.begin(); f != this->chans.end(); f++)
1708         {
1709                 Channel* c = *f;
1710                 c->RemoveAllPrefixes(this);
1711                 if (c->DelUser(this) == 0)
1712                 {
1713                         /* No users left in here, mark it for deletion */
1714                         try
1715                         {
1716                                 to_delete.push_back(c);
1717                         }
1718                         catch (...)
1719                         {
1720                                 ServerInstance->Logs->Log("USERS", DEBUG,"Exception in User::PurgeEmptyChannels to_delete.push_back()");
1721                         }
1722                 }
1723         }
1724
1725         for (std::vector<Channel*>::iterator n = to_delete.begin(); n != to_delete.end(); n++)
1726         {
1727                 Channel* thischan = *n;
1728                 chan_hash::iterator i2 = ServerInstance->chanlist->find(thischan->name);
1729                 if (i2 != ServerInstance->chanlist->end())
1730                 {
1731                         ModResult MOD_RESULT;
1732                         FIRST_MOD_RESULT(OnChannelPreDelete, MOD_RESULT, (i2->second));
1733                         if (MOD_RESULT == MOD_RES_DENY)
1734                                 continue; // delete halted by module
1735                         FOREACH_MOD(I_OnChannelDelete,OnChannelDelete(i2->second));
1736                         delete i2->second;
1737                         ServerInstance->chanlist->erase(i2);
1738                         this->chans.erase(*n);
1739                 }
1740         }
1741
1742         this->UnOper();
1743 }
1744
1745 void User::ShowMOTD()
1746 {
1747         if (!ServerInstance->Config->MOTD.size())
1748         {
1749                 this->WriteNumeric(ERR_NOMOTD, "%s :Message of the day file is missing.",this->nick.c_str());
1750                 return;
1751         }
1752         this->WriteNumeric(RPL_MOTDSTART, "%s :%s message of the day", this->nick.c_str(), ServerInstance->Config->ServerName.c_str());
1753
1754         for (file_cache::iterator i = ServerInstance->Config->MOTD.begin(); i != ServerInstance->Config->MOTD.end(); i++)
1755                 this->WriteNumeric(RPL_MOTD, "%s :- %s",this->nick.c_str(),i->c_str());
1756
1757         this->WriteNumeric(RPL_ENDOFMOTD, "%s :End of message of the day.", this->nick.c_str());
1758 }
1759
1760 void User::ShowRULES()
1761 {
1762         if (!ServerInstance->Config->RULES.size())
1763         {
1764                 this->WriteNumeric(ERR_NORULES, "%s :RULES File is missing",this->nick.c_str());
1765                 return;
1766         }
1767
1768         this->WriteNumeric(RPL_RULESTART, "%s :- %s Server Rules -",this->nick.c_str(),ServerInstance->Config->ServerName.c_str());
1769
1770         for (file_cache::iterator i = ServerInstance->Config->RULES.begin(); i != ServerInstance->Config->RULES.end(); i++)
1771                 this->WriteNumeric(RPL_RULES, "%s :- %s",this->nick.c_str(),i->c_str());
1772
1773         this->WriteNumeric(RPL_RULESEND, "%s :End of RULES command.",this->nick.c_str());
1774 }
1775
1776 void User::IncreasePenalty(int increase)
1777 {
1778         this->Penalty += increase;
1779 }
1780
1781 void User::DecreasePenalty(int decrease)
1782 {
1783         this->Penalty -= decrease;
1784 }
1785
1786 void FakeUser::SetFakeServer(std::string name)
1787 {
1788         this->nick = name;
1789         this->server = name;
1790 }
1791
1792 const std::string FakeUser::GetFullHost()
1793 {
1794         if (!ServerInstance->Config->HideWhoisServer.empty())
1795                 return ServerInstance->Config->HideWhoisServer;
1796         return nick;
1797 }
1798
1799 const std::string FakeUser::GetFullRealHost()
1800 {
1801         if (!ServerInstance->Config->HideWhoisServer.empty())
1802                 return ServerInstance->Config->HideWhoisServer;
1803         return nick;
1804 }
1805
1806 ConnectClass::ConnectClass(ConfigTag* tag, char t, const std::string& mask)
1807         : config(tag), type(t), name("unnamed"), registration_timeout(0), host(mask),
1808         pingtime(0), pass(""), hash(""), softsendqmax(0), hardsendqmax(0),
1809         recvqmax(0), maxlocal(0), maxglobal(0), maxchans(0), port(0), limit(0)
1810 {
1811 }
1812
1813 ConnectClass::ConnectClass(ConfigTag* tag, char t, const std::string& mask, const ConnectClass& parent)
1814         : config(tag), type(t), name("unnamed"),
1815         registration_timeout(parent.registration_timeout), host(mask),
1816         pingtime(parent.pingtime), pass(parent.pass), hash(parent.hash),
1817         softsendqmax(parent.softsendqmax), hardsendqmax(parent.hardsendqmax),
1818         recvqmax(parent.recvqmax), maxlocal(parent.maxlocal),
1819         maxglobal(parent.maxglobal), maxchans(parent.maxchans),
1820         port(parent.port), limit(parent.limit)
1821 {
1822 }
1823
1824 void ConnectClass::Update(const ConnectClass* src)
1825 {
1826         name = src->name;
1827         registration_timeout = src->registration_timeout;
1828         host = src->host;
1829         pingtime = src->pingtime;
1830         pass = src->pass;
1831         hash = src->hash;
1832         softsendqmax = src->softsendqmax;
1833         hardsendqmax = src->hardsendqmax;
1834         recvqmax = src->recvqmax;
1835         maxlocal = src->maxlocal;
1836         maxglobal = src->maxglobal;
1837         limit = src->limit;
1838 }