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         uuid = uid;
 237
 238         ServerInstance->Logs->Log("USERS", DEBUG, "New UUID for user: %s", uuid.c_str());
 239
 240         user_hash::iterator finduuid = ServerInstance->Users->uuidlist->find(uuid);
 241         if (finduuid == ServerInstance->Users->uuidlist->end())
 242                 (*ServerInstance->Users->uuidlist)[uuid] = this;
 243         else
 244                 throw CoreException("Duplicate UUID "+std::string(uuid)+" in User constructor");
 245 }
 246
 247 LocalUser::LocalUser() : User(ServerInstance->GetUID())
 248 {
 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         int penaltymax = MyClass->GetPenaltyThreshold();
 519         if (penaltymax == 0 || HasPrivPermission("users/flood/no-fakelag"))
 520                 penaltymax = INT_MAX;
 521
 522         while (Penalty < penaltymax && getSendQSize() < sendqmax)
 523         {
 524                 std::string line;
 525                 line.reserve(MAXBUF);
 526                 std::string::size_type qpos = 0;
 527                 while (qpos < recvq.length())
 528                 {
 529                         char c = recvq[qpos++];
 530                         switch (c)
 531                         {
 532                         case '\0':
 533                                 c = ' ';
 534                                 break;
 535                         case '\r':
 536                                 continue;
 537                         case '\n':
 538                                 goto eol_found;
 539                         }
 540                         if (line.length() < MAXBUF - 2)
 541                                 line.push_back(c);
 542                 }
 543                 // if we got here, the recvq ran out before we found a newline
 544                 return;
 545 eol_found:
 546                 // just found a newline. Terminate the string, and pull it out of recvq
 547                 recvq = recvq.substr(qpos);
 548
 549                 // TODO should this be moved to when it was inserted in recvq?
 550                 ServerInstance->stats->statsRecv += qpos;
 551                 this->bytes_in += qpos;
 552                 this->cmds_in++;
 553
 554                 ServerInstance->Parser->ProcessBuffer(line, this);
 555                 if (quitting)
 556                         return;
 557         }
 558         // Add pseudo-penalty so that we continue processing after sendq recedes
 559         if (Penalty == 0 && getSendQSize() >= sendqmax)
 560                 Penalty++;
 561 }
 562
 563 void User::AddWriteBuf(const std::string &data)
 564 {
 565         // Don't bother sending text to remote users!
 566         if (IS_REMOTE(this))
 567                 return;
 568         if (!quitting && MyClass && getSendQSize() + data.length() > MyClass->GetSendqHardMax() && !HasPrivPermission("users/flood/increased-buffers"))
 569         {
 570                 /*
 571                  * Quit the user FIRST, because otherwise we could recurse
 572                  * here and hit the same limit.
 573                  */
 574                 ServerInstance->Users->QuitUser(this, "SendQ exceeded");
 575                 ServerInstance->SNO->WriteToSnoMask('a', "User %s SendQ exceeds connect class maximum of %lu",
 576                         nick.c_str(), MyClass->GetSendqHardMax());
 577                 return;
 578         }
 579
 580         // We still want to append data to the sendq of a quitting user,
 581         // e.g. their ERROR message that says 'closing link'
 582
 583         WriteData(data);
 584 }
 585
 586 void User::OnError(BufferedSocketError)
 587 {
 588         ServerInstance->Users->QuitUser(this, getError());
 589 }
 590
 591 CullResult User::cull()
 592 {
 593         if (!quitting)
 594                 ServerInstance->Users->QuitUser(this, "Culled without QuitUser");
 595         if (uuid.empty())
 596         {
 597                 ServerInstance->Logs->Log("USERS", DEBUG, "User culled twice? UUID empty");
 598                 return Extensible::cull();
 599         }
 600         PurgeEmptyChannels();
 601         if (IS_LOCAL(this))
 602         {
 603                 if (fd != INT_MAX)
 604                         Close();
 605
 606                 std::vector<LocalUser*>::iterator x = find(ServerInstance->Users->local_users.begin(),ServerInstance->Users->local_users.end(),this);
 607                 if (x != ServerInstance->Users->local_users.end())
 608                         ServerInstance->Users->local_users.erase(x);
 609                 else
 610                         ServerInstance->Logs->Log("USERS", DEBUG, "Failed to remove user from vector");
 611         }
 612
 613         if (this->AllowedOperCommands)
 614         {
 615                 delete AllowedOperCommands;
 616                 AllowedOperCommands = NULL;
 617         }
 618
 619         if (this->AllowedPrivs)
 620         {
 621                 delete AllowedPrivs;
 622                 AllowedPrivs = NULL;
 623         }
 624
 625         this->InvalidateCache();
 626         this->DecrementModes();
 627
 628         if (client_sa.sa.sa_family != AF_UNSPEC)
 629                 ServerInstance->Users->RemoveCloneCounts(this);
 630
 631         ServerInstance->Users->uuidlist->erase(uuid);
 632         uuid.clear();
 633         return Extensible::cull();
 634 }
 635
 636 void User::Oper(const std::string &opertype, const std::string &opername)
 637 {
 638         if (this->IsModeSet('o'))
 639                 this->UnOper();
 640
 641         this->modes[UM_OPERATOR] = 1;
 642         this->WriteServ("MODE %s :+o", this->nick.c_str());
 643         FOREACH_MOD(I_OnOper, OnOper(this, opertype));
 644
 645         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());
 646         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()));
 647
 648         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());
 649         this->oper.assign(opertype, 0, 512);
 650         ServerInstance->Users->all_opers.push_back(this);
 651
 652         /*
 653          * This might look like it's in the wrong place.
 654          * It is *not*!
 655          *
 656          * 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.
 657          * -- w00t
 658          */
 659         TagIndex::iterator iter_opertype = ServerInstance->Config->opertypes.find(this->oper.c_str());
 660         if (iter_opertype != ServerInstance->Config->opertypes.end())
 661         {
 662                 if (AllowedOperCommands)
 663                         AllowedOperCommands->clear();
 664                 else
 665                         AllowedOperCommands = new std::set<std::string>;
 666
 667                 if (AllowedPrivs)
 668                         AllowedPrivs->clear();
 669                 else
 670                         AllowedPrivs = new std::set<std::string>;
 671
 672                 AllowedUserModes.reset();
 673                 AllowedChanModes.reset();
 674                 this->AllowedUserModes['o' - 'A'] = true; // Call me paranoid if you want.
 675
 676                 std::string myclass, mycmd, mypriv;
 677                 irc::spacesepstream Classes(iter_opertype->second->getString("classes"));
 678                 while (Classes.GetToken(myclass))
 679                 {
 680                         TagIndex::iterator iter_operclass = ServerInstance->Config->operclass.find(myclass.c_str());
 681                         if (iter_operclass != ServerInstance->Config->operclass.end())
 682                         {
 683                                 /* Process commands */
 684                                 irc::spacesepstream CommandList(iter_operclass->second->getString("commands"));
 685                                 while (CommandList.GetToken(mycmd))
 686                                 {
 687                                         this->AllowedOperCommands->insert(mycmd);
 688                                 }
 689
 690                                 irc::spacesepstream PrivList(iter_operclass->second->getString("privs"));
 691                                 while (PrivList.GetToken(mypriv))
 692                                 {
 693                                         this->AllowedPrivs->insert(mypriv);
 694                                 }
 695
 696                                 for (unsigned char* c = (unsigned char*)iter_operclass->second->getString("usermodes").c_str(); *c; ++c)
 697                                 {
 698                                         if (*c == '*')
 699                                         {
 700                                                 this->AllowedUserModes.set();
 701                                         }
 702                                         else
 703                                         {
 704                                                 this->AllowedUserModes[*c - 'A'] = true;
 705                                         }
 706                                 }
 707
 708                                 for (unsigned char* c = (unsigned char*)iter_operclass->second->getString("chanmodes").c_str(); *c; ++c)
 709                                 {
 710                                         if (*c == '*')
 711                                         {
 712                                                 this->AllowedChanModes.set();
 713                                         }
 714                                         else
 715                                         {
 716                                                 this->AllowedChanModes[*c - 'A'] = true;
 717                                         }
 718                                 }
 719                         }
 720                 }
 721         }
 722
 723         FOREACH_MOD(I_OnPostOper,OnPostOper(this, opertype, opername));
 724 }
 725
 726 void User::UnOper()
 727 {
 728         if (IS_OPER(this))
 729         {
 730                 /*
 731                  * unset their oper type (what IS_OPER checks).
 732                  * note, order is important - this must come before modes as -o attempts
 733                  * to call UnOper. -- w00t
 734                  */
 735                 this->oper.clear();
 736
 737
 738                 /* Remove all oper only modes from the user when the deoper - Bug #466*/
 739                 std::string moderemove("-");
 740
 741                 for (unsigned char letter = 'A'; letter <= 'z'; letter++)
 742                 {
 743                         ModeHandler* mh = ServerInstance->Modes->FindMode(letter, MODETYPE_USER);
 744                         if (mh && mh->NeedsOper())
 745                                 moderemove += letter;
 746                 }
 747
 748
 749                 std::vector<std::string> parameters;
 750                 parameters.push_back(this->nick);
 751                 parameters.push_back(moderemove);
 752
 753                 ServerInstance->Parser->CallHandler("MODE", parameters, this);
 754
 755                 /* remove the user from the oper list. Will remove multiple entries as a safeguard against bug #404 */
 756                 ServerInstance->Users->all_opers.remove(this);
 757
 758                 if (AllowedOperCommands)
 759                 {
 760                         delete AllowedOperCommands;
 761                         AllowedOperCommands = NULL;
 762                 }
 763
 764                 if (AllowedPrivs)
 765                 {
 766                         delete AllowedPrivs;
 767                         AllowedPrivs = NULL;
 768                 }
 769
 770                 AllowedUserModes.reset();
 771                 AllowedChanModes.reset();
 772                 this->modes[UM_OPERATOR] = 0;
 773         }
 774 }
 775
 776 /* adds or updates an entry in the whowas list */
 777 void User::AddToWhoWas()
 778 {
 779         Module* whowas = ServerInstance->Modules->Find("cmd_whowas.so");
 780         if (whowas)
 781         {
 782                 WhowasRequest req(NULL, whowas, WhowasRequest::WHOWAS_ADD);
 783                 req.user = this;
 784                 req.Send();
 785         }
 786 }
 787
 788 /*
 789  * Check class restrictions
 790  */
 791 void User::CheckClass()
 792 {
 793         ConnectClass* a = this->MyClass;
 794
 795         if ((!a) || (a->type == CC_DENY))
 796         {
 797                 ServerInstance->Users->QuitUser(this, "Unauthorised connection");
 798                 return;
 799         }
 800         else if ((a->GetMaxLocal()) && (ServerInstance->Users->LocalCloneCount(this) > a->GetMaxLocal()))
 801         {
 802                 ServerInstance->Users->QuitUser(this, "No more connections allowed from your host via this connect class (local)");
 803                 ServerInstance->SNO->WriteToSnoMask('a', "WARNING: maximum LOCAL connections (%ld) exceeded for IP %s", a->GetMaxLocal(), this->GetIPString());
 804                 return;
 805         }
 806         else if ((a->GetMaxGlobal()) && (ServerInstance->Users->GlobalCloneCount(this) > a->GetMaxGlobal()))
 807         {
 808                 ServerInstance->Users->QuitUser(this, "No more connections allowed from your host via this connect class (global)");
 809                 ServerInstance->SNO->WriteToSnoMask('a', "WARNING: maximum GLOBAL connections (%ld) exceeded for IP %s", a->GetMaxGlobal(), this->GetIPString());
 810                 return;
 811         }
 812
 813         this->nping = ServerInstance->Time() + a->GetPingTime() + ServerInstance->Config->dns_timeout;
 814 }
 815
 816 bool User::CheckLines(bool doZline)
 817 {
 818         const char* check[] = { "G" , "K", (doZline) ? "Z" : NULL, NULL };
 819
 820         if (!this->exempt)
 821         {
 822                 for (int n = 0; check[n]; ++n)
 823                 {
 824                         XLine *r = ServerInstance->XLines->MatchesLine(check[n], this);
 825
 826                         if (r)
 827                         {
 828                                 r->Apply(this);
 829                                 return true;
 830                         }
 831                 }
 832         }
 833
 834         return false;
 835 }
 836
 837 void LocalUser::FullConnect()
 838 {
 839         ServerInstance->stats->statsConnects++;
 840         this->idle_lastmsg = ServerInstance->Time();
 841
 842         /*
 843          * You may be thinking "wtf, we checked this in User::AddClient!" - and yes, we did, BUT.
 844          * At the time AddClient is called, we don't have a resolved host, by here we probably do - which
 845          * may put the user into a totally seperate class with different restrictions! so we *must* check again.
 846          * Don't remove this! -- w00t
 847          */
 848         this->SetClass();
 849
 850         /* Check the password, if one is required by the user's connect class.
 851          * This CANNOT be in CheckClass(), because that is called prior to PASS as well!
 852          */
 853         if (MyClass && !MyClass->pass.empty())
 854         {
 855                 if (ServerInstance->PassCompare(this, MyClass->pass.c_str(), password.c_str(), MyClass->hash.c_str()))
 856                 {
 857                         ServerInstance->Users->QuitUser(this, "Invalid password");
 858                         return;
 859                 }
 860         }
 861
 862         if (this->CheckLines())
 863                 return;
 864
 865         this->WriteServ("NOTICE Auth :Welcome to \002%s\002!",ServerInstance->Config->Network.c_str());
 866         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());
 867         this->WriteNumeric(RPL_YOURHOSTIS, "%s :Your host is %s, running version InspIRCd-2.0",this->nick.c_str(),ServerInstance->Config->ServerName.c_str());
 868         this->WriteNumeric(RPL_SERVERCREATED, "%s :This server was created %s %s", this->nick.c_str(), __TIME__, __DATE__);
 869         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());
 870
 871         ServerInstance->Config->Send005(this);
 872         this->WriteNumeric(RPL_YOURUUID, "%s %s :your unique ID", this->nick.c_str(), this->uuid.c_str());
 873
 874
 875         this->ShowMOTD();
 876
 877         /* Now registered */
 878         if (ServerInstance->Users->unregistered_count)
 879                 ServerInstance->Users->unregistered_count--;
 880
 881         /* Trigger LUSERS output, give modules a chance too */
 882         ModResult MOD_RESULT;
 883         std::string command("LUSERS");
 884         std::vector<std::string> parameters;
 885         FIRST_MOD_RESULT(OnPreCommand, MOD_RESULT, (command, parameters, this, true, "LUSERS"));
 886         if (!MOD_RESULT)
 887                 ServerInstance->CallCommandHandler(command, parameters, this);
 888
 889         /*
 890          * We don't set REG_ALL until triggering OnUserConnect, so some module events don't spew out stuff
 891          * for a user that doesn't exist yet.
 892          */
 893         FOREACH_MOD(I_OnUserConnect,OnUserConnect(this));
 894
 895         this->registered = REG_ALL;
 896
 897         FOREACH_MOD(I_OnPostConnect,OnPostConnect(this));
 898
 899         ServerInstance->SNO->WriteToSnoMask('c',"Client connecting on port %d: %s!%s@%s [%s] [%s]",
 900                 this->GetServerPort(), this->nick.c_str(), this->ident.c_str(), this->host.c_str(), this->GetIPString(), this->fullname.c_str());
 901         ServerInstance->Logs->Log("BANCACHE", DEBUG, "BanCache: Adding NEGATIVE hit for %s", this->GetIPString());
 902         ServerInstance->BanCache->AddHit(this->GetIPString(), "", "");
 903 }
 904
 905 /** User::UpdateNick()
 906  * re-allocates a nick in the user_hash after they change nicknames,
 907  * returns a pointer to the new user as it may have moved
 908  */
 909 User* User::UpdateNickHash(const char* New)
 910 {
 911         //user_hash::iterator newnick;
 912         user_hash::iterator oldnick = ServerInstance->Users->clientlist->find(this->nick);
 913
 914         if (!irc::string(this->nick.c_str()).compare(New))
 915                 return oldnick->second;
 916
 917         if (oldnick == ServerInstance->Users->clientlist->end())
 918                 return NULL; /* doesnt exist */
 919
 920         User* olduser = oldnick->second;
 921         ServerInstance->Users->clientlist->erase(oldnick);
 922         (*(ServerInstance->Users->clientlist))[New] = olduser;
 923         return olduser;
 924 }
 925
 926 void User::InvalidateCache()
 927 {
 928         /* Invalidate cache */
 929         cached_fullhost.clear();
 930         cached_hostip.clear();
 931         cached_makehost.clear();
 932         cached_fullrealhost.clear();
 933 }
 934
 935 bool User::ForceNickChange(const char* newnick)
 936 {
 937         ModResult MOD_RESULT;
 938
 939         this->InvalidateCache();
 940
 941         ServerInstance->NICKForced.set(this, 1);
 942         FIRST_MOD_RESULT(OnUserPreNick, MOD_RESULT, (this, newnick));
 943         ServerInstance->NICKForced.set(this, 0);
 944
 945         if (MOD_RESULT == MOD_RES_DENY)
 946         {
 947                 ServerInstance->stats->statsCollisions++;
 948                 return false;
 949         }
 950
 951         std::deque<classbase*> dummy;
 952         Command* nickhandler = ServerInstance->Parser->GetHandler("NICK");
 953         if (nickhandler) // wtfbbq, when would this not be here
 954         {
 955                 std::vector<std::string> parameters;
 956                 parameters.push_back(newnick);
 957                 ServerInstance->NICKForced.set(this, 1);
 958                 bool result = (ServerInstance->Parser->CallHandler("NICK", parameters, this) == CMD_SUCCESS);
 959                 ServerInstance->NICKForced.set(this, 0);
 960                 return result;
 961         }
 962
 963         // Unreachable, we hope
 964         return false;
 965 }
 966
 967 int User::GetServerPort()
 968 {
 969         switch (this->server_sa.sa.sa_family)
 970         {
 971                 case AF_INET6:
 972                         return htons(this->server_sa.in6.sin6_port);
 973                 case AF_INET:
 974                         return htons(this->server_sa.in4.sin_port);
 975         }
 976         return 0;
 977 }
 978
 979 const char* User::GetCIDRMask(int range)
 980 {
 981         static char buf[44];
 982
 983         if (range < 0)
 984                 throw "Negative range, sorry, no.";
 985
 986         /*
 987          * Original code written by Oliver Lupton (Om).
 988          * Integrated by me. Thanks. :) -- w00t
 989          */
 990         switch (this->client_sa.sa.sa_family)
 991         {
 992                 case AF_INET6:
 993                 {
 994                         /* unsigned char s6_addr[16]; */
 995                         struct in6_addr v6;
 996                         int i, bytestozero, extrabits;
 997                         char buffer[40];
 998
 999                         if(range > 128)
1000                                 throw "CIDR mask width greater than address width (IPv6, 128 bit)";
1001
1002                         /* To create the CIDR mask we want to set all the bits after 'range' bits of the address
1003                          * to zero. This means the last (128 - range) bits of the address must be set to zero.
1004                          * Hence this number divided by 8 is the number of whole bytes from the end of the address
1005                          * which must be set to zero.
1006                          */
1007                         bytestozero = (128 - range) / 8;
1008
1009                         /* Some of the least significant bits of the next most significant byte may also have to
1010                          * be zeroed. The number of bits is the remainder of the above division.
1011                          */
1012                         extrabits = (128 - range) % 8;
1013
1014                         /* Populate our working struct with the parts of the user's IP which are required in the
1015                          * final CIDR mask. Set all the subsequent bytes to zero.
1016                          * (16 - bytestozero) is the number of bytes which must be populated with actual IP data.
1017                          */
1018                         for(i = 0; i < (16 - bytestozero); i++)
1019                         {
1020                                 v6.s6_addr[i] = client_sa.in6.sin6_addr.s6_addr[i];
1021                         }
1022
1023                         /* And zero all the remaining bytes in the IP. */
1024                         for(; i < 16; i++)
1025                         {
1026                                 v6.s6_addr[i] = 0;
1027                         }
1028
1029                         /* And finally, zero the extra bits required. */
1030                         v6.s6_addr[15 - bytestozero] = (v6.s6_addr[15 - bytestozero] >> extrabits) << extrabits;
1031
1032                         snprintf(buf, 44, "%s/%d", inet_ntop(AF_INET6, &v6, buffer, 40), range);
1033                         return buf;
1034                 }
1035                 break;
1036                 case AF_INET:
1037                 {
1038                         struct in_addr v4;
1039                         char buffer[16];
1040
1041                         if (range > 32)
1042                                 throw "CIDR mask width greater than address width (IPv4, 32 bit)";
1043
1044                         /* Users already have a sockaddr* pointer (User::ip) which contains either a v4 or v6 structure */
1045                         v4.s_addr = client_sa.in4.sin_addr.s_addr;
1046
1047                         /* To create the CIDR mask we want to set all the bits after 'range' bits of the address
1048                          * to zero. This means the last (32 - range) bits of the address must be set to zero.
1049                          * This is done by shifting the value right and then back left by (32 - range) bits.
1050                          */
1051                         if(range > 0)
1052                         {
1053                                 v4.s_addr = ntohl(v4.s_addr);
1054                                 v4.s_addr = (v4.s_addr >> (32 - range)) << (32 - range);
1055                                 v4.s_addr = htonl(v4.s_addr);
1056                         }
1057                         else
1058                         {
1059                                 /* a range of zero would cause a 32 bit value to be shifted by 32 bits.
1060                                  * this has undefined behaviour, but for CIDR purposes the resulting mask
1061                                  * from a.b.c.d/0 is 0.0.0.0/0
1062                                  */
1063                                 v4.s_addr = 0;
1064                         }
1065
1066                         snprintf(buf, 44, "%s/%d", inet_ntop(AF_INET, &v4, buffer, 16), range);
1067                         return buf;
1068                 }
1069                 break;
1070         }
1071
1072         return ""; // unused, but oh well
1073 }
1074
1075 const char* User::GetIPString()
1076 {
1077         int port;
1078         if (cachedip.empty())
1079         {
1080                 irc::sockets::satoap(&client_sa, cachedip, port);
1081                 /* IP addresses starting with a : on irc are a Bad Thing (tm) */
1082                 if (cachedip.c_str()[0] == ':')
1083                         cachedip.insert(0,1,'0');
1084         }
1085
1086         return cachedip.c_str();
1087 }
1088
1089 bool User::SetClientIP(const char* sip)
1090 {
1091         this->cachedip = "";
1092         return irc::sockets::aptosa(sip, 0, &client_sa);
1093 }
1094
1095 static std::string wide_newline("\r\n");
1096
1097 void User::Write(const std::string& text)
1098 {
1099         if (!ServerInstance->SE->BoundsCheckFd(this))
1100                 return;
1101
1102         if (text.length() > MAXBUF - 2)
1103         {
1104                 // this should happen rarely or never. Crop the string at 512 and try again.
1105                 std::string try_again = text.substr(0, MAXBUF - 2);
1106                 Write(try_again);
1107                 return;
1108         }
1109
1110         ServerInstance->Logs->Log("USEROUTPUT", DEBUG,"C[%d] O %s", this->GetFd(), text.c_str());
1111
1112         this->AddWriteBuf(text);
1113         this->AddWriteBuf(wide_newline);
1114
1115         ServerInstance->stats->statsSent += text.length() + 2;
1116         this->bytes_out += text.length() + 2;
1117         this->cmds_out++;
1118 }
1119
1120 /** Write()
1121  */
1122 void User::Write(const char *text, ...)
1123 {
1124         va_list argsPtr;
1125         char textbuffer[MAXBUF];
1126
1127         va_start(argsPtr, text);
1128         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1129         va_end(argsPtr);
1130
1131         this->Write(std::string(textbuffer));
1132 }
1133
1134 void User::WriteServ(const std::string& text)
1135 {
1136         this->Write(":%s %s",ServerInstance->Config->ServerName.c_str(),text.c_str());
1137 }
1138
1139 /** WriteServ()
1140  *  Same as Write(), except `text' is prefixed with `:server.name '.
1141  */
1142 void User::WriteServ(const char* text, ...)
1143 {
1144         va_list argsPtr;
1145         char textbuffer[MAXBUF];
1146
1147         va_start(argsPtr, text);
1148         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1149         va_end(argsPtr);
1150
1151         this->WriteServ(std::string(textbuffer));
1152 }
1153
1154
1155 void User::WriteNumeric(unsigned int numeric, const char* text, ...)
1156 {
1157         va_list argsPtr;
1158         char textbuffer[MAXBUF];
1159
1160         va_start(argsPtr, text);
1161         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1162         va_end(argsPtr);
1163
1164         this->WriteNumeric(numeric, std::string(textbuffer));
1165 }
1166
1167 void User::WriteNumeric(unsigned int numeric, const std::string &text)
1168 {
1169         char textbuffer[MAXBUF];
1170         ModResult MOD_RESULT;
1171
1172         FIRST_MOD_RESULT(OnNumeric, MOD_RESULT, (this, numeric, text));
1173
1174         if (MOD_RESULT == MOD_RES_DENY)
1175                 return;
1176
1177         snprintf(textbuffer,MAXBUF,":%s %03u %s",ServerInstance->Config->ServerName.c_str(), numeric, text.c_str());
1178         this->Write(std::string(textbuffer));
1179 }
1180
1181 void User::WriteFrom(User *user, const std::string &text)
1182 {
1183         char tb[MAXBUF];
1184
1185         snprintf(tb,MAXBUF,":%s %s",user->GetFullHost().c_str(),text.c_str());
1186
1187         this->Write(std::string(tb));
1188 }
1189
1190
1191 /* write text from an originating user to originating user */
1192
1193 void User::WriteFrom(User *user, const char* text, ...)
1194 {
1195         va_list argsPtr;
1196         char textbuffer[MAXBUF];
1197
1198         va_start(argsPtr, text);
1199         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1200         va_end(argsPtr);
1201
1202         this->WriteFrom(user, std::string(textbuffer));
1203 }
1204
1205
1206 /* write text to an destination user from a source user (e.g. user privmsg) */
1207
1208 void User::WriteTo(User *dest, const char *data, ...)
1209 {
1210         char textbuffer[MAXBUF];
1211         va_list argsPtr;
1212
1213         va_start(argsPtr, data);
1214         vsnprintf(textbuffer, MAXBUF, data, argsPtr);
1215         va_end(argsPtr);
1216
1217         this->WriteTo(dest, std::string(textbuffer));
1218 }
1219
1220 void User::WriteTo(User *dest, const std::string &data)
1221 {
1222         dest->WriteFrom(this, data);
1223 }
1224
1225 void User::WriteCommon(const char* text, ...)
1226 {
1227         char textbuffer[MAXBUF];
1228         va_list argsPtr;
1229
1230         if (this->registered != REG_ALL || quitting)
1231                 return;
1232
1233         int len = snprintf(textbuffer,MAXBUF,":%s ",this->GetFullHost().c_str());
1234
1235         va_start(argsPtr, text);
1236         vsnprintf(textbuffer + len, MAXBUF - len, text, argsPtr);
1237         va_end(argsPtr);
1238
1239         this->WriteCommonRaw(std::string(textbuffer), true);
1240 }
1241
1242 void User::WriteCommonExcept(const char* text, ...)
1243 {
1244         char textbuffer[MAXBUF];
1245         va_list argsPtr;
1246
1247         if (this->registered != REG_ALL || quitting)
1248                 return;
1249
1250         int len = snprintf(textbuffer,MAXBUF,":%s ",this->GetFullHost().c_str());
1251
1252         va_start(argsPtr, text);
1253         vsnprintf(textbuffer + len, MAXBUF - len, text, argsPtr);
1254         va_end(argsPtr);
1255
1256         this->WriteCommonRaw(std::string(textbuffer), false);
1257 }
1258
1259 void User::WriteCommonRaw(const std::string &line, bool include_self)
1260 {
1261         if (this->registered != REG_ALL || quitting)
1262                 return;
1263
1264         uniq_id_t uniq_id = ++already_sent;
1265
1266         UserChanList include_c(chans);
1267         std::map<User*,bool> exceptions;
1268
1269         exceptions[this] = include_self;
1270
1271         FOREACH_MOD(I_OnBuildNeighborList,OnBuildNeighborList(this, include_c, exceptions));
1272
1273         for (std::map<User*,bool>::iterator i = exceptions.begin(); i != exceptions.end(); ++i)
1274         {
1275                 User* u = i->first;
1276                 if (IS_LOCAL(u) && !u->quitting)
1277                 {
1278                         already_sent[u->fd] = uniq_id;
1279                         if (i->second)
1280                                 u->Write(line);
1281                 }
1282         }
1283         for (UCListIter v = include_c.begin(); v != include_c.end(); ++v)
1284         {
1285                 Channel* c = *v;
1286                 const UserMembList* ulist = c->GetUsers();
1287                 for (UserMembList::const_iterator i = ulist->begin(); i != ulist->end(); i++)
1288                 {
1289                         User* u = i->first;
1290                         if (IS_LOCAL(u) && !u->quitting && already_sent[u->fd] != uniq_id)
1291                         {
1292                                 already_sent[u->fd] = uniq_id;
1293                                 u->Write(line);
1294                         }
1295                 }
1296         }
1297 }
1298
1299 void User::WriteCommonQuit(const std::string &normal_text, const std::string &oper_text)
1300 {
1301         char tb1[MAXBUF];
1302         char tb2[MAXBUF];
1303
1304         if (this->registered != REG_ALL)
1305                 return;
1306
1307         uniq_id_t uniq_id = ++already_sent;
1308
1309         snprintf(tb1,MAXBUF,":%s QUIT :%s",this->GetFullHost().c_str(),normal_text.c_str());
1310         snprintf(tb2,MAXBUF,":%s QUIT :%s",this->GetFullHost().c_str(),oper_text.c_str());
1311         std::string out1 = tb1;
1312         std::string out2 = tb2;
1313
1314         UserChanList include_c(chans);
1315         std::map<User*,bool> exceptions;
1316
1317         FOREACH_MOD(I_OnBuildNeighborList,OnBuildNeighborList(this, include_c, exceptions));
1318
1319         for (std::map<User*,bool>::iterator i = exceptions.begin(); i != exceptions.end(); ++i)
1320         {
1321                 User* u = i->first;
1322                 if (IS_LOCAL(u) && !u->quitting)
1323                 {
1324                         already_sent[u->fd] = uniq_id;
1325                         if (i->second)
1326                                 u->Write(IS_OPER(u) ? out2 : out1);
1327                 }
1328         }
1329         for (UCListIter v = include_c.begin(); v != include_c.end(); ++v)
1330         {
1331                 const UserMembList* ulist = (*v)->GetUsers();
1332                 for (UserMembList::const_iterator i = ulist->begin(); i != ulist->end(); i++)
1333                 {
1334                         User* u = i->first;
1335                         if (IS_LOCAL(u) && !u->quitting && (already_sent[u->fd] != uniq_id))
1336                         {
1337                                 already_sent[u->fd] = uniq_id;
1338                                 u->Write(IS_OPER(u) ? out2 : out1);
1339                         }
1340                 }
1341         }
1342 }
1343
1344 void LocalUser::SendText(const std::string& line)
1345 {
1346         Write(line);
1347 }
1348
1349 void RemoteUser::SendText(const std::string& line)
1350 {
1351         ServerInstance->PI->PushToClient(this, line);
1352 }
1353
1354 void FakeUser::SendText(const std::string& line)
1355 {
1356 }
1357
1358 void User::SendText(const char *text, ...)
1359 {
1360         va_list argsPtr;
1361         char line[MAXBUF];
1362
1363         va_start(argsPtr, text);
1364         vsnprintf(line, MAXBUF, text, argsPtr);
1365         va_end(argsPtr);
1366
1367         SendText(std::string(line));
1368 }
1369
1370 void User::SendText(const std::string &LinePrefix, std::stringstream &TextStream)
1371 {
1372         char line[MAXBUF];
1373         int start_pos = LinePrefix.length();
1374         int pos = start_pos;
1375         memcpy(line, LinePrefix.data(), pos);
1376         std::string Word;
1377         while (TextStream >> Word)
1378         {
1379                 int len = Word.length();
1380                 if (pos + len + 12 > MAXBUF)
1381                 {
1382                         line[pos] = '\0';
1383                         SendText(std::string(line));
1384                         pos = start_pos;
1385                 }
1386                 line[pos] = ' ';
1387                 memcpy(line + pos + 1, Word.data(), len);
1388                 pos += len + 1;
1389         }
1390         line[pos] = '\0';
1391         SendText(std::string(line));
1392 }
1393
1394 /* return 0 or 1 depending if users u and u2 share one or more common channels
1395  * (used by QUIT, NICK etc which arent channel specific notices)
1396  *
1397  * The old algorithm in 1.0 for this was relatively inefficient, iterating over
1398  * the first users channels then the second users channels within the outer loop,
1399  * therefore it was a maximum of x*y iterations (upon returning 0 and checking
1400  * all possible iterations). However this new function instead checks against the
1401  * channel's userlist in the inner loop which is a std::map<User*,User*>
1402  * and saves us time as we already know what pointer value we are after.
1403  * Don't quote me on the maths as i am not a mathematician or computer scientist,
1404  * but i believe this algorithm is now x+(log y) maximum iterations instead.
1405  */
1406 bool User::SharesChannelWith(User *other)
1407 {
1408         if ((!other) || (this->registered != REG_ALL) || (other->registered != REG_ALL))
1409                 return false;
1410
1411         /* Outer loop */
1412         for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1413         {
1414                 /* Eliminate the inner loop (which used to be ~equal in size to the outer loop)
1415                  * by replacing it with a map::find which *should* be more efficient
1416                  */
1417                 if ((*i)->HasUser(other))
1418                         return true;
1419         }
1420         return false;
1421 }
1422
1423 bool User::ChangeName(const char* gecos)
1424 {
1425         if (!this->fullname.compare(gecos))
1426                 return true;
1427
1428         if (IS_LOCAL(this))
1429         {
1430                 ModResult MOD_RESULT;
1431                 FIRST_MOD_RESULT(OnChangeLocalUserGECOS, MOD_RESULT, (this,gecos));
1432                 if (MOD_RESULT == MOD_RES_DENY)
1433                         return false;
1434                 FOREACH_MOD(I_OnChangeName,OnChangeName(this,gecos));
1435         }
1436         this->fullname.assign(gecos, 0, ServerInstance->Config->Limits.MaxGecos);
1437
1438         return true;
1439 }
1440
1441 void User::DoHostCycle(const std::string &quitline)
1442 {
1443         char buffer[MAXBUF];
1444
1445         if (!ServerInstance->Config->CycleHosts)
1446                 return;
1447
1448         uniq_id_t silent_id = ++already_sent;
1449         uniq_id_t seen_id = ++already_sent;
1450
1451         UserChanList include_c(chans);
1452         std::map<User*,bool> exceptions;
1453
1454         FOREACH_MOD(I_OnBuildNeighborList,OnBuildNeighborList(this, include_c, exceptions));
1455
1456         for (std::map<User*,bool>::iterator i = exceptions.begin(); i != exceptions.end(); ++i)
1457         {
1458                 User* u = i->first;
1459                 if (IS_LOCAL(u) && !u->quitting)
1460                 {
1461                         if (i->second)
1462                         {
1463                                 already_sent[u->fd] = seen_id;
1464                                 u->Write(quitline);
1465                         }
1466                         else
1467                         {
1468                                 already_sent[u->fd] = silent_id;
1469                         }
1470                 }
1471         }
1472         for (UCListIter v = include_c.begin(); v != include_c.end(); ++v)
1473         {
1474                 Channel* c = *v;
1475                 snprintf(buffer, MAXBUF, ":%s JOIN %s", GetFullHost().c_str(), c->name.c_str());
1476                 std::string joinline(buffer);
1477                 std::string modeline = ServerInstance->Modes->ModeString(this, c);
1478                 if (modeline.length() > 0)
1479                 {
1480                         snprintf(buffer, MAXBUF, ":%s MODE %s +%s", GetFullHost().c_str(), c->name.c_str(), modeline.c_str());
1481                         modeline = buffer;
1482                 }
1483
1484                 const UserMembList *ulist = c->GetUsers();
1485                 for (UserMembList::const_iterator i = ulist->begin(); i != ulist->end(); i++)
1486                 {
1487                         User* u = i->first;
1488                         if (u == this || !IS_LOCAL(u))
1489                                 continue;
1490                         if (already_sent[u->fd] == silent_id)
1491                                 continue;
1492
1493                         if (already_sent[u->fd] != seen_id)
1494                         {
1495                                 u->Write(quitline);
1496                                 already_sent[i->first->fd] = seen_id;
1497                         }
1498                         u->Write(joinline);
1499                         if (modeline.length() > 0)
1500                                 u->Write(modeline);
1501                 }
1502         }
1503 }
1504
1505 bool User::ChangeDisplayedHost(const char* shost)
1506 {
1507         if (dhost == shost)
1508                 return true;
1509
1510         if (IS_LOCAL(this))
1511         {
1512                 ModResult MOD_RESULT;
1513                 FIRST_MOD_RESULT(OnChangeLocalUserHost, MOD_RESULT, (this,shost));
1514                 if (MOD_RESULT == MOD_RES_DENY)
1515                         return false;
1516         }
1517
1518         FOREACH_MOD(I_OnChangeHost, OnChangeHost(this,shost));
1519
1520         std::string quitstr = ":" + GetFullHost() + " QUIT :Changing host";
1521
1522         /* Fix by Om: User::dhost is 65 long, this was truncating some long hosts */
1523         this->dhost.assign(shost, 0, 64);
1524
1525         this->InvalidateCache();
1526
1527         this->DoHostCycle(quitstr);
1528
1529         if (IS_LOCAL(this))
1530                 this->WriteNumeric(RPL_YOURDISPLAYEDHOST, "%s %s :is now your displayed host",this->nick.c_str(),this->dhost.c_str());
1531
1532         return true;
1533 }
1534
1535 bool User::ChangeIdent(const char* newident)
1536 {
1537         if (this->ident == newident)
1538                 return true;
1539
1540         FOREACH_MOD(I_OnChangeIdent, OnChangeIdent(this,newident));
1541
1542         std::string quitstr = ":" + GetFullHost() + " QUIT :Changing ident";
1543
1544         this->ident.assign(newident, 0, ServerInstance->Config->Limits.IdentMax + 1);
1545
1546         this->InvalidateCache();
1547
1548         this->DoHostCycle(quitstr);
1549
1550         return true;
1551 }
1552
1553 void User::SendAll(const char* command, const char* text, ...)
1554 {
1555         char textbuffer[MAXBUF];
1556         char formatbuffer[MAXBUF];
1557         va_list argsPtr;
1558
1559         va_start(argsPtr, text);
1560         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1561         va_end(argsPtr);
1562
1563         snprintf(formatbuffer,MAXBUF,":%s %s $* :%s", this->GetFullHost().c_str(), command, textbuffer);
1564         std::string fmt = formatbuffer;
1565
1566         for (std::vector<LocalUser*>::const_iterator i = ServerInstance->Users->local_users.begin(); i != ServerInstance->Users->local_users.end(); i++)
1567         {
1568                 (*i)->Write(fmt);
1569         }
1570 }
1571
1572
1573 std::string User::ChannelList(User* source, bool spy)
1574 {
1575         std::string list;
1576
1577         for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1578         {
1579                 Channel* c = *i;
1580                 /* If the target is the sender, neither +p nor +s is set, or
1581                  * the channel contains the user, it is not a spy channel
1582                  */
1583                 if (spy != (source == this || !(c->IsModeSet('p') || c->IsModeSet('s')) || c->HasUser(source)))
1584                         list.append(c->GetPrefixChar(this)).append(c->name).append(" ");
1585         }
1586
1587         return list;
1588 }
1589
1590 void User::SplitChanList(User* dest, const std::string &cl)
1591 {
1592         std::string line;
1593         std::ostringstream prefix;
1594         std::string::size_type start, pos, length;
1595
1596         prefix << this->nick << " " << dest->nick << " :";
1597         line = prefix.str();
1598         int namelen = ServerInstance->Config->ServerName.length() + 6;
1599
1600         for (start = 0; (pos = cl.find(' ', start)) != std::string::npos; start = pos+1)
1601         {
1602                 length = (pos == std::string::npos) ? cl.length() : pos;
1603
1604                 if (line.length() + namelen + length - start > 510)
1605                 {
1606                         ServerInstance->SendWhoisLine(this, dest, 319, "%s", line.c_str());
1607                         line = prefix.str();
1608                 }
1609
1610                 if(pos == std::string::npos)
1611                 {
1612                         line.append(cl.substr(start, length - start));
1613                         break;
1614                 }
1615                 else
1616                 {
1617                         line.append(cl.substr(start, length - start + 1));
1618                 }
1619         }
1620
1621         if (line.length())
1622         {
1623                 ServerInstance->SendWhoisLine(this, dest, 319, "%s", line.c_str());
1624         }
1625 }
1626
1627 /*
1628  * Sets a user's connection class.
1629  * If the class name is provided, it will be used. Otherwise, the class will be guessed using host/ip/ident/etc.
1630  * NOTE: If the <ALLOW> or <DENY> tag specifies an ip, and this user resolves,
1631  * then their ip will be taken as 'priority' anyway, so for example,
1632  * <connect allow="127.0.0.1"> will match joe!bloggs@localhost
1633  */
1634 ConnectClass* LocalUser::SetClass(const std::string &explicit_name)
1635 {
1636         ConnectClass *found = NULL;
1637
1638         ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Setting connect class for UID %s", this->uuid.c_str());
1639
1640         if (!explicit_name.empty())
1641         {
1642                 for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++)
1643                 {
1644                         ConnectClass* c = *i;
1645
1646                         if (explicit_name == c->name)
1647                         {
1648                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Explicitly set to %s", explicit_name.c_str());
1649                                 found = c;
1650                         }
1651                 }
1652         }
1653         else
1654         {
1655                 for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++)
1656                 {
1657                         ConnectClass* c = *i;
1658
1659                         if (c->type == CC_ALLOW)
1660                         {
1661                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "ALLOW %s %d %s", c->host.c_str(), c->GetPort(), c->GetName().c_str());
1662                         }
1663                         else
1664                         {
1665                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "DENY %s %d %s", c->GetHost().c_str(), c->GetPort(), c->GetName().c_str());
1666                         }
1667
1668                         /* check if host matches.. */
1669                         if (c->GetHost().length() && !InspIRCd::MatchCIDR(this->GetIPString(), c->GetHost(), NULL) &&
1670                             !InspIRCd::MatchCIDR(this->host, c->GetHost(), NULL))
1671                         {
1672                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "No host match (for %s)", c->GetHost().c_str());
1673                                 continue;
1674                         }
1675
1676                         /*
1677                          * deny change if change will take class over the limit check it HERE, not after we found a matching class,
1678                          * because we should attempt to find another class if this one doesn't match us. -- w00t
1679                          */
1680                         if (c->limit && (c->GetReferenceCount() >= c->limit))
1681                         {
1682                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "OOPS: Connect class limit (%lu) hit, denying", c->limit);
1683                                 continue;
1684                         }
1685
1686                         /* if it requires a port ... */
1687                         if (c->GetPort())
1688                         {
1689                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Requires port (%d)", c->GetPort());
1690
1691                                 /* and our port doesn't match, fail. */
1692                                 if (this->GetServerPort() != c->GetPort())
1693                                 {
1694                                         ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Port match failed (%d)", this->GetServerPort());
1695                                         continue;
1696                                 }
1697                         }
1698
1699                         /* we stop at the first class that meets ALL critera. */
1700                         found = c;
1701                         break;
1702                 }
1703         }
1704
1705         /*
1706          * Okay, assuming we found a class that matches.. switch us into that class, keeping refcounts up to date.
1707          */
1708         if (found)
1709         {
1710                 MyClass = found;
1711         }
1712
1713         return this->MyClass;
1714 }
1715
1716 /* looks up a users password for their connection class (<ALLOW>/<DENY> tags)
1717  * NOTE: If the <ALLOW> or <DENY> tag specifies an ip, and this user resolves,
1718  * then their ip will be taken as 'priority' anyway, so for example,
1719  * <connect allow="127.0.0.1"> will match joe!bloggs@localhost
1720  */
1721 ConnectClass* User::GetClass()
1722 {
1723         return this->MyClass;
1724 }
1725
1726 void User::PurgeEmptyChannels()
1727 {
1728         // firstly decrement the count on each channel
1729         for (UCListIter f = this->chans.begin(); f != this->chans.end(); f++)
1730         {
1731                 Channel* c = *f;
1732                 c->DelUser(this);
1733         }
1734
1735         this->UnOper();
1736 }
1737
1738 void User::ShowMOTD()
1739 {
1740         if (!ServerInstance->Config->MOTD.size())
1741         {
1742                 this->WriteNumeric(ERR_NOMOTD, "%s :Message of the day file is missing.",this->nick.c_str());
1743                 return;
1744         }
1745         this->WriteNumeric(RPL_MOTDSTART, "%s :%s message of the day", this->nick.c_str(), ServerInstance->Config->ServerName.c_str());
1746
1747         for (file_cache::iterator i = ServerInstance->Config->MOTD.begin(); i != ServerInstance->Config->MOTD.end(); i++)
1748                 this->WriteNumeric(RPL_MOTD, "%s :- %s",this->nick.c_str(),i->c_str());
1749
1750         this->WriteNumeric(RPL_ENDOFMOTD, "%s :End of message of the day.", this->nick.c_str());
1751 }
1752
1753 void User::ShowRULES()
1754 {
1755         if (!ServerInstance->Config->RULES.size())
1756         {
1757                 this->WriteNumeric(ERR_NORULES, "%s :RULES File is missing",this->nick.c_str());
1758                 return;
1759         }
1760
1761         this->WriteNumeric(RPL_RULESTART, "%s :- %s Server Rules -",this->nick.c_str(),ServerInstance->Config->ServerName.c_str());
1762
1763         for (file_cache::iterator i = ServerInstance->Config->RULES.begin(); i != ServerInstance->Config->RULES.end(); i++)
1764                 this->WriteNumeric(RPL_RULES, "%s :- %s",this->nick.c_str(),i->c_str());
1765
1766         this->WriteNumeric(RPL_RULESEND, "%s :End of RULES command.",this->nick.c_str());
1767 }
1768
1769 void User::IncreasePenalty(int increase)
1770 {
1771         this->Penalty += increase;
1772 }
1773
1774 void FakeUser::SetFakeServer(std::string name)
1775 {
1776         this->nick = name;
1777         this->server = name;
1778 }
1779
1780 const std::string FakeUser::GetFullHost()
1781 {
1782         if (!ServerInstance->Config->HideWhoisServer.empty())
1783                 return ServerInstance->Config->HideWhoisServer;
1784         return nick;
1785 }
1786
1787 const std::string FakeUser::GetFullRealHost()
1788 {
1789         if (!ServerInstance->Config->HideWhoisServer.empty())
1790                 return ServerInstance->Config->HideWhoisServer;
1791         return nick;
1792 }
1793
1794 ConnectClass::ConnectClass(ConfigTag* tag, char t, const std::string& mask)
1795         : config(tag), type(t), name("unnamed"), registration_timeout(0), host(mask),
1796         pingtime(0), pass(""), hash(""), softsendqmax(0), hardsendqmax(0),
1797         recvqmax(0), penaltythreshold(0), maxlocal(0), maxglobal(0), maxchans(0), port(0), limit(0)
1798 {
1799 }
1800
1801 ConnectClass::ConnectClass(ConfigTag* tag, char t, const std::string& mask, const ConnectClass& parent)
1802         : config(tag), type(t), name("unnamed"),
1803         registration_timeout(parent.registration_timeout), host(mask),
1804         pingtime(parent.pingtime), pass(parent.pass), hash(parent.hash),
1805         softsendqmax(parent.softsendqmax), hardsendqmax(parent.hardsendqmax),
1806         recvqmax(parent.recvqmax), penaltythreshold(parent.penaltythreshold), maxlocal(parent.maxlocal),
1807         maxglobal(parent.maxglobal), maxchans(parent.maxchans),
1808         port(parent.port), limit(parent.limit)
1809 {
1810 }
1811
1812 void ConnectClass::Update(const ConnectClass* src)
1813 {
1814         name = src->name;
1815         registration_timeout = src->registration_timeout;
1816         host = src->host;
1817         pingtime = src->pingtime;
1818         pass = src->pass;
1819         hash = src->hash;
1820         softsendqmax = src->softsendqmax;
1821         hardsendqmax = src->hardsendqmax;
1822         recvqmax = src->recvqmax;
1823         penaltythreshold = src->penaltythreshold;
1824         maxlocal = src->maxlocal;
1825         maxglobal = src->maxglobal;
1826         limit = src->limit;
1827 }