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