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 LocalUser::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         signon = idle_lastmsg = registered = 0;
 229         quietquit = quitting = exempt = dns_done = false;
 230         fd = -1;
 231         uuid = uid;
 232         client_sa.sa.sa_family = AF_UNSPEC;
 233
 234         ServerInstance->Logs->Log("USERS", DEBUG, "New UUID for user: %s", uuid.c_str());
 235
 236         user_hash::iterator finduuid = ServerInstance->Users->uuidlist->find(uuid);
 237         if (finduuid == ServerInstance->Users->uuidlist->end())
 238                 (*ServerInstance->Users->uuidlist)[uuid] = this;
 239         else
 240                 throw CoreException("Duplicate UUID "+std::string(uuid)+" in User constructor");
 241 }
 242
 243 LocalUser::LocalUser() : User(ServerInstance->GetUID())
 244 {
 245         bytes_in = bytes_out = cmds_in = cmds_out = 0;
 246         server_sa.sa.sa_family = AF_UNSPEC;
 247         Penalty = 0;
 248         lastping = nping = 0;
 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 LocalUser::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* LocalUser::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 LocalUser::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 LocalUser::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, ModeType)
 425 {
 426         return true;
 427 }
 428
 429 bool LocalUser::HasModePermission(unsigned char mode, ModeType type)
 430 {
 431         if (!IS_OPER(this))
 432                 return false;
 433
 434         if (mode < 'A' || mode > ('A' + 64)) return false;
 435
 436         return ((type == MODETYPE_USER ? oper->AllowedUserModes : oper->AllowedChanModes))[(mode - 'A')];
 437
 438 }
 439 /*
 440  * users on remote servers can completely bypass all permissions based checks.
 441  * This prevents desyncs when one server has different type/class tags to another.
 442  * That having been said, this does open things up to the possibility of source changes
 443  * allowing remote kills, etc - but if they have access to the src, they most likely have
 444  * access to the conf - so it's an end to a means either way.
 445  */
 446 bool User::HasPermission(const std::string&)
 447 {
 448         return true;
 449 }
 450
 451 bool LocalUser::HasPermission(const std::string &command)
 452 {
 453         // are they even an oper at all?
 454         if (!IS_OPER(this))
 455         {
 456                 return false;
 457         }
 458
 459         if (oper->AllowedOperCommands.find(command) != oper->AllowedOperCommands.end())
 460                 return true;
 461         else if (oper->AllowedOperCommands.find("*") != oper->AllowedOperCommands.end())
 462                 return true;
 463
 464         return false;
 465 }
 466
 467 bool User::HasPrivPermission(const std::string &privstr, bool noisy)
 468 {
 469         return true;
 470 }
 471
 472 bool LocalUser::HasPrivPermission(const std::string &privstr, bool noisy)
 473 {
 474         if (!IS_OPER(this))
 475         {
 476                 if (noisy)
 477                         this->WriteServ("NOTICE %s :You are not an oper", this->nick.c_str());
 478                 return false;
 479         }
 480
 481         if (oper->AllowedPrivs.find(privstr) != oper->AllowedPrivs.end())
 482         {
 483                 return true;
 484         }
 485         else if (oper->AllowedPrivs.find("*") != oper->AllowedPrivs.end())
 486         {
 487                 return true;
 488         }
 489
 490         if (noisy)
 491                 this->WriteServ("NOTICE %s :Oper type %s does not have access to priv %s", this->nick.c_str(), oper->NameStr(), privstr.c_str());
 492         return false;
 493 }
 494
 495 void User::OnDataReady()
 496 {
 497 }
 498
 499 void LocalUser::OnDataReady()
 500 {
 501         if (quitting)
 502                 return;
 503
 504         if (recvq.length() > MyClass->GetRecvqMax() && !HasPrivPermission("users/flood/increased-buffers"))
 505         {
 506                 ServerInstance->Users->QuitUser(this, "RecvQ exceeded");
 507                 ServerInstance->SNO->WriteToSnoMask('a', "User %s RecvQ of %lu exceeds connect class maximum of %lu",
 508                         nick.c_str(), (unsigned long)recvq.length(), MyClass->GetRecvqMax());
 509         }
 510         unsigned long sendqmax = ULONG_MAX;
 511         if (!HasPrivPermission("users/flood/increased-buffers"))
 512                 sendqmax = MyClass->GetSendqSoftMax();
 513         int penaltymax = MyClass->GetPenaltyThreshold();
 514         if (penaltymax == 0 || HasPrivPermission("users/flood/no-fakelag"))
 515                 penaltymax = INT_MAX;
 516
 517         while (Penalty < penaltymax && getSendQSize() < sendqmax)
 518         {
 519                 std::string line;
 520                 line.reserve(MAXBUF);
 521                 std::string::size_type qpos = 0;
 522                 while (qpos < recvq.length())
 523                 {
 524                         char c = recvq[qpos++];
 525                         switch (c)
 526                         {
 527                         case '\0':
 528                                 c = ' ';
 529                                 break;
 530                         case '\r':
 531                                 continue;
 532                         case '\n':
 533                                 goto eol_found;
 534                         }
 535                         if (line.length() < MAXBUF - 2)
 536                                 line.push_back(c);
 537                 }
 538                 // if we got here, the recvq ran out before we found a newline
 539                 return;
 540 eol_found:
 541                 // just found a newline. Terminate the string, and pull it out of recvq
 542                 recvq = recvq.substr(qpos);
 543
 544                 // TODO should this be moved to when it was inserted in recvq?
 545                 ServerInstance->stats->statsRecv += qpos;
 546                 this->bytes_in += qpos;
 547                 this->cmds_in++;
 548
 549                 ServerInstance->Parser->ProcessBuffer(line, this);
 550                 if (quitting)
 551                         return;
 552         }
 553         // Add pseudo-penalty so that we continue processing after sendq recedes
 554         if (Penalty == 0 && getSendQSize() >= sendqmax)
 555                 Penalty++;
 556 }
 557
 558 void LocalUser::AddWriteBuf(const std::string &data)
 559 {
 560         if (!quitting && getSendQSize() + data.length() > MyClass->GetSendqHardMax() && !HasPrivPermission("users/flood/increased-buffers"))
 561         {
 562                 /*
 563                  * Quit the user FIRST, because otherwise we could recurse
 564                  * here and hit the same limit.
 565                  */
 566                 ServerInstance->Users->QuitUser(this, "SendQ exceeded");
 567                 ServerInstance->SNO->WriteToSnoMask('a', "User %s SendQ exceeds connect class maximum of %lu",
 568                         nick.c_str(), MyClass->GetSendqHardMax());
 569                 return;
 570         }
 571
 572         // We still want to append data to the sendq of a quitting user,
 573         // e.g. their ERROR message that says 'closing link'
 574
 575         WriteData(data);
 576 }
 577
 578 void User::OnError(BufferedSocketError)
 579 {
 580         ServerInstance->Users->QuitUser(this, getError());
 581 }
 582
 583 CullResult User::cull()
 584 {
 585         if (!quitting)
 586                 ServerInstance->Users->QuitUser(this, "Culled without QuitUser");
 587         if (uuid.empty())
 588         {
 589                 ServerInstance->Logs->Log("USERS", DEBUG, "User culled twice? UUID empty");
 590                 return Extensible::cull();
 591         }
 592         PurgeEmptyChannels();
 593         if (IS_LOCAL(this) && fd != INT_MAX)
 594                 Close();
 595
 596         this->InvalidateCache();
 597         this->DecrementModes();
 598
 599         ServerInstance->Users->uuidlist->erase(uuid);
 600         uuid.clear();
 601         return Extensible::cull();
 602 }
 603
 604 CullResult LocalUser::cull()
 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         if (client_sa.sa.sa_family != AF_UNSPEC)
 613                 ServerInstance->Users->RemoveCloneCounts(this);
 614         return User::cull();
 615 }
 616
 617 void User::Oper(OperInfo* info)
 618 {
 619         if (this->IsModeSet('o'))
 620                 this->UnOper();
 621
 622         this->modes[UM_OPERATOR] = 1;
 623         this->oper = info;
 624         this->WriteServ("MODE %s :+o", this->nick.c_str());
 625         FOREACH_MOD(I_OnOper, OnOper(this, info->name));
 626
 627         std::string opername;
 628         if (info->oper_block)
 629                 opername = info->oper_block->getString("name");
 630
 631         ServerInstance->SNO->WriteToSnoMask('o',"%s (%s@%s) is now an IRC operator of type %s (using oper '%s')",
 632                 nick.c_str(), ident.c_str(), host.c_str(), info->NameStr(), opername.c_str());
 633         this->WriteNumeric(381, "%s :You are now %s %s", nick.c_str(), strchr("aeiouAEIOU", info->name[0]) ? "an" : "a", info->NameStr());
 634
 635         ServerInstance->Logs->Log("OPER", DEFAULT, "%s!%s@%s opered as type: %s", this->nick.c_str(), this->ident.c_str(), this->host.c_str(), info->NameStr());
 636         ServerInstance->Users->all_opers.push_back(this);
 637
 638         // Expand permissions from config for faster lookup
 639         if (IS_LOCAL(this))
 640                 oper->init();
 641
 642         FOREACH_MOD(I_OnPostOper,OnPostOper(this, info->name, opername));
 643 }
 644
 645 void OperInfo::init()
 646 {
 647         AllowedOperCommands.clear();
 648         AllowedPrivs.clear();
 649         AllowedUserModes.reset();
 650         AllowedChanModes.reset();
 651         AllowedUserModes['o' - 'A'] = true; // Call me paranoid if you want.
 652
 653         for(std::vector<reference<ConfigTag> >::iterator iter = class_blocks.begin(); iter != class_blocks.end(); ++iter)
 654         {
 655                 ConfigTag* tag = *iter;
 656                 std::string mycmd, mypriv;
 657                 /* Process commands */
 658                 irc::spacesepstream CommandList(tag->getString("commands"));
 659                 while (CommandList.GetToken(mycmd))
 660                 {
 661                         AllowedOperCommands.insert(mycmd);
 662                 }
 663
 664                 irc::spacesepstream PrivList(tag->getString("privs"));
 665                 while (PrivList.GetToken(mypriv))
 666                 {
 667                         AllowedPrivs.insert(mypriv);
 668                 }
 669
 670                 for (unsigned char* c = (unsigned char*)tag->getString("usermodes").c_str(); *c; ++c)
 671                 {
 672                         if (*c == '*')
 673                         {
 674                                 this->AllowedUserModes.set();
 675                         }
 676                         else
 677                         {
 678                                 this->AllowedUserModes[*c - 'A'] = true;
 679                         }
 680                 }
 681
 682                 for (unsigned char* c = (unsigned char*)tag->getString("chanmodes").c_str(); *c; ++c)
 683                 {
 684                         if (*c == '*')
 685                         {
 686                                 this->AllowedChanModes.set();
 687                         }
 688                         else
 689                         {
 690                                 this->AllowedChanModes[*c - 'A'] = true;
 691                         }
 692                 }
 693         }
 694 }
 695
 696 void User::UnOper()
 697 {
 698         if (!IS_OPER(this))
 699                 return;
 700
 701         /*
 702          * unset their oper type (what IS_OPER checks).
 703          * note, order is important - this must come before modes as -o attempts
 704          * to call UnOper. -- w00t
 705          */
 706         oper = NULL;
 707
 708
 709         /* Remove all oper only modes from the user when the deoper - Bug #466*/
 710         std::string moderemove("-");
 711
 712         for (unsigned char letter = 'A'; letter <= 'z'; letter++)
 713         {
 714                 ModeHandler* mh = ServerInstance->Modes->FindMode(letter, MODETYPE_USER);
 715                 if (mh && mh->NeedsOper())
 716                         moderemove += letter;
 717         }
 718
 719
 720         std::vector<std::string> parameters;
 721         parameters.push_back(this->nick);
 722         parameters.push_back(moderemove);
 723
 724         ServerInstance->Parser->CallHandler("MODE", parameters, this);
 725
 726         /* remove the user from the oper list. Will remove multiple entries as a safeguard against bug #404 */
 727         ServerInstance->Users->all_opers.remove(this);
 728
 729         this->modes[UM_OPERATOR] = 0;
 730 }
 731
 732 /* adds or updates an entry in the whowas list */
 733 void User::AddToWhoWas()
 734 {
 735         Module* whowas = ServerInstance->Modules->Find("cmd_whowas.so");
 736         if (whowas)
 737         {
 738                 WhowasRequest req(NULL, whowas, WhowasRequest::WHOWAS_ADD);
 739                 req.user = this;
 740                 req.Send();
 741         }
 742 }
 743
 744 /*
 745  * Check class restrictions
 746  */
 747 void LocalUser::CheckClass()
 748 {
 749         ConnectClass* a = this->MyClass;
 750
 751         if (!a)
 752         {
 753                 ServerInstance->Users->QuitUser(this, "Access denied by configuration");
 754         }
 755         else if (a->type == CC_DENY)
 756         {
 757                 ServerInstance->Users->QuitUser(this, "Unauthorised connection");
 758                 return;
 759         }
 760         else if ((a->GetMaxLocal()) && (ServerInstance->Users->LocalCloneCount(this) > a->GetMaxLocal()))
 761         {
 762                 ServerInstance->Users->QuitUser(this, "No more connections allowed from your host via this connect class (local)");
 763                 ServerInstance->SNO->WriteToSnoMask('a', "WARNING: maximum LOCAL connections (%ld) exceeded for IP %s", a->GetMaxLocal(), this->GetIPString());
 764                 return;
 765         }
 766         else if ((a->GetMaxGlobal()) && (ServerInstance->Users->GlobalCloneCount(this) > a->GetMaxGlobal()))
 767         {
 768                 ServerInstance->Users->QuitUser(this, "No more connections allowed from your host via this connect class (global)");
 769                 ServerInstance->SNO->WriteToSnoMask('a', "WARNING: maximum GLOBAL connections (%ld) exceeded for IP %s", a->GetMaxGlobal(), this->GetIPString());
 770                 return;
 771         }
 772
 773         this->nping = ServerInstance->Time() + a->GetPingTime() + ServerInstance->Config->dns_timeout;
 774 }
 775
 776 bool User::CheckLines(bool doZline)
 777 {
 778         const char* check[] = { "G" , "K", (doZline) ? "Z" : NULL, NULL };
 779
 780         if (!this->exempt)
 781         {
 782                 for (int n = 0; check[n]; ++n)
 783                 {
 784                         XLine *r = ServerInstance->XLines->MatchesLine(check[n], this);
 785
 786                         if (r)
 787                         {
 788                                 r->Apply(this);
 789                                 return true;
 790                         }
 791                 }
 792         }
 793
 794         return false;
 795 }
 796
 797 void LocalUser::FullConnect()
 798 {
 799         ServerInstance->stats->statsConnects++;
 800         this->idle_lastmsg = ServerInstance->Time();
 801
 802         /*
 803          * You may be thinking "wtf, we checked this in User::AddClient!" - and yes, we did, BUT.
 804          * At the time AddClient is called, we don't have a resolved host, by here we probably do - which
 805          * may put the user into a totally seperate class with different restrictions! so we *must* check again.
 806          * Don't remove this! -- w00t
 807          */
 808         this->SetClass();
 809
 810         /* Check the password, if one is required by the user's connect class.
 811          * This CANNOT be in CheckClass(), because that is called prior to PASS as well!
 812          */
 813         if (!MyClass->pass.empty())
 814         {
 815                 if (ServerInstance->PassCompare(this, MyClass->pass.c_str(), password.c_str(), MyClass->hash.c_str()))
 816                 {
 817                         ServerInstance->Users->QuitUser(this, "Invalid password");
 818                         return;
 819                 }
 820         }
 821
 822         if (this->CheckLines())
 823                 return;
 824
 825         this->WriteServ("NOTICE Auth :Welcome to \002%s\002!",ServerInstance->Config->Network.c_str());
 826         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());
 827         this->WriteNumeric(RPL_YOURHOSTIS, "%s :Your host is %s, running version InspIRCd-2.0",this->nick.c_str(),ServerInstance->Config->ServerName.c_str());
 828         this->WriteNumeric(RPL_SERVERCREATED, "%s :This server was created %s %s", this->nick.c_str(), __TIME__, __DATE__);
 829         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());
 830
 831         ServerInstance->Config->Send005(this);
 832         this->WriteNumeric(RPL_YOURUUID, "%s %s :your unique ID", this->nick.c_str(), this->uuid.c_str());
 833
 834
 835         this->ShowMOTD();
 836
 837         /* Now registered */
 838         if (ServerInstance->Users->unregistered_count)
 839                 ServerInstance->Users->unregistered_count--;
 840
 841         /* Trigger LUSERS output, give modules a chance too */
 842         ModResult MOD_RESULT;
 843         std::string command("LUSERS");
 844         std::vector<std::string> parameters;
 845         FIRST_MOD_RESULT(OnPreCommand, MOD_RESULT, (command, parameters, this, true, "LUSERS"));
 846         if (!MOD_RESULT)
 847                 ServerInstance->CallCommandHandler(command, parameters, this);
 848
 849         /*
 850          * We don't set REG_ALL until triggering OnUserConnect, so some module events don't spew out stuff
 851          * for a user that doesn't exist yet.
 852          */
 853         FOREACH_MOD(I_OnUserConnect,OnUserConnect(this));
 854
 855         this->registered = REG_ALL;
 856
 857         FOREACH_MOD(I_OnPostConnect,OnPostConnect(this));
 858
 859         ServerInstance->SNO->WriteToSnoMask('c',"Client connecting on port %d: %s!%s@%s [%s] [%s]",
 860                 this->GetServerPort(), this->nick.c_str(), this->ident.c_str(), this->host.c_str(), this->GetIPString(), this->fullname.c_str());
 861         ServerInstance->Logs->Log("BANCACHE", DEBUG, "BanCache: Adding NEGATIVE hit for %s", this->GetIPString());
 862         ServerInstance->BanCache->AddHit(this->GetIPString(), "", "");
 863 }
 864
 865 /** User::UpdateNick()
 866  * re-allocates a nick in the user_hash after they change nicknames,
 867  * returns a pointer to the new user as it may have moved
 868  */
 869 User* User::UpdateNickHash(const char* New)
 870 {
 871         //user_hash::iterator newnick;
 872         user_hash::iterator oldnick = ServerInstance->Users->clientlist->find(this->nick);
 873
 874         if (!irc::string(this->nick.c_str()).compare(New))
 875                 return oldnick->second;
 876
 877         if (oldnick == ServerInstance->Users->clientlist->end())
 878                 return NULL; /* doesnt exist */
 879
 880         User* olduser = oldnick->second;
 881         ServerInstance->Users->clientlist->erase(oldnick);
 882         (*(ServerInstance->Users->clientlist))[New] = olduser;
 883         return olduser;
 884 }
 885
 886 void User::InvalidateCache()
 887 {
 888         /* Invalidate cache */
 889         cached_fullhost.clear();
 890         cached_hostip.clear();
 891         cached_makehost.clear();
 892         cached_fullrealhost.clear();
 893 }
 894
 895 bool User::ForceNickChange(const char* newnick)
 896 {
 897         ModResult MOD_RESULT;
 898
 899         this->InvalidateCache();
 900
 901         ServerInstance->NICKForced.set(this, 1);
 902         FIRST_MOD_RESULT(OnUserPreNick, MOD_RESULT, (this, newnick));
 903         ServerInstance->NICKForced.set(this, 0);
 904
 905         if (MOD_RESULT == MOD_RES_DENY)
 906         {
 907                 ServerInstance->stats->statsCollisions++;
 908                 return false;
 909         }
 910
 911         std::deque<classbase*> dummy;
 912         Command* nickhandler = ServerInstance->Parser->GetHandler("NICK");
 913         if (nickhandler) // wtfbbq, when would this not be here
 914         {
 915                 std::vector<std::string> parameters;
 916                 parameters.push_back(newnick);
 917                 ServerInstance->NICKForced.set(this, 1);
 918                 bool result = (ServerInstance->Parser->CallHandler("NICK", parameters, this) == CMD_SUCCESS);
 919                 ServerInstance->NICKForced.set(this, 0);
 920                 return result;
 921         }
 922
 923         // Unreachable, we hope
 924         return false;
 925 }
 926
 927 int LocalUser::GetServerPort()
 928 {
 929         switch (this->server_sa.sa.sa_family)
 930         {
 931                 case AF_INET6:
 932                         return htons(this->server_sa.in6.sin6_port);
 933                 case AF_INET:
 934                         return htons(this->server_sa.in4.sin_port);
 935         }
 936         return 0;
 937 }
 938
 939 const char* User::GetCIDRMask(int range)
 940 {
 941         static char buf[44];
 942
 943         if (range < 0)
 944                 throw "Negative range, sorry, no.";
 945
 946         /*
 947          * Original code written by Oliver Lupton (Om).
 948          * Integrated by me. Thanks. :) -- w00t
 949          */
 950         switch (this->client_sa.sa.sa_family)
 951         {
 952                 case AF_INET6:
 953                 {
 954                         /* unsigned char s6_addr[16]; */
 955                         struct in6_addr v6;
 956                         int i, bytestozero, extrabits;
 957                         char buffer[40];
 958
 959                         if(range > 128)
 960                                 throw "CIDR mask width greater than address width (IPv6, 128 bit)";
 961
 962                         /* To create the CIDR mask we want to set all the bits after 'range' bits of the address
 963                          * to zero. This means the last (128 - range) bits of the address must be set to zero.
 964                          * Hence this number divided by 8 is the number of whole bytes from the end of the address
 965                          * which must be set to zero.
 966                          */
 967                         bytestozero = (128 - range) / 8;
 968
 969                         /* Some of the least significant bits of the next most significant byte may also have to
 970                          * be zeroed. The number of bits is the remainder of the above division.
 971                          */
 972                         extrabits = (128 - range) % 8;
 973
 974                         /* Populate our working struct with the parts of the user's IP which are required in the
 975                          * final CIDR mask. Set all the subsequent bytes to zero.
 976                          * (16 - bytestozero) is the number of bytes which must be populated with actual IP data.
 977                          */
 978                         for(i = 0; i < (16 - bytestozero); i++)
 979                         {
 980                                 v6.s6_addr[i] = client_sa.in6.sin6_addr.s6_addr[i];
 981                         }
 982
 983                         /* And zero all the remaining bytes in the IP. */
 984                         for(; i < 16; i++)
 985                         {
 986                                 v6.s6_addr[i] = 0;
 987                         }
 988
 989                         /* And finally, zero the extra bits required. */
 990                         v6.s6_addr[15 - bytestozero] = (v6.s6_addr[15 - bytestozero] >> extrabits) << extrabits;
 991
 992                         snprintf(buf, 44, "%s/%d", inet_ntop(AF_INET6, &v6, buffer, 40), range);
 993                         return buf;
 994                 }
 995                 break;
 996                 case AF_INET:
 997                 {
 998                         struct in_addr v4;
 999                         char buffer[16];
1000
1001                         if (range > 32)
1002                                 throw "CIDR mask width greater than address width (IPv4, 32 bit)";
1003
1004                         /* Users already have a sockaddr* pointer (User::ip) which contains either a v4 or v6 structure */
1005                         v4.s_addr = client_sa.in4.sin_addr.s_addr;
1006
1007                         /* To create the CIDR mask we want to set all the bits after 'range' bits of the address
1008                          * to zero. This means the last (32 - range) bits of the address must be set to zero.
1009                          * This is done by shifting the value right and then back left by (32 - range) bits.
1010                          */
1011                         if(range > 0)
1012                         {
1013                                 v4.s_addr = ntohl(v4.s_addr);
1014                                 v4.s_addr = (v4.s_addr >> (32 - range)) << (32 - range);
1015                                 v4.s_addr = htonl(v4.s_addr);
1016                         }
1017                         else
1018                         {
1019                                 /* a range of zero would cause a 32 bit value to be shifted by 32 bits.
1020                                  * this has undefined behaviour, but for CIDR purposes the resulting mask
1021                                  * from a.b.c.d/0 is 0.0.0.0/0
1022                                  */
1023                                 v4.s_addr = 0;
1024                         }
1025
1026                         snprintf(buf, 44, "%s/%d", inet_ntop(AF_INET, &v4, buffer, 16), range);
1027                         return buf;
1028                 }
1029                 break;
1030         }
1031
1032         return ""; // unused, but oh well
1033 }
1034
1035 const char* User::GetIPString()
1036 {
1037         int port;
1038         if (cachedip.empty())
1039         {
1040                 irc::sockets::satoap(&client_sa, cachedip, port);
1041                 /* IP addresses starting with a : on irc are a Bad Thing (tm) */
1042                 if (cachedip.c_str()[0] == ':')
1043                         cachedip.insert(0,1,'0');
1044         }
1045
1046         return cachedip.c_str();
1047 }
1048
1049 bool User::SetClientIP(const char* sip)
1050 {
1051         this->cachedip = "";
1052         return irc::sockets::aptosa(sip, 0, &client_sa);
1053 }
1054
1055 static std::string wide_newline("\r\n");
1056
1057 void User::Write(const std::string& text)
1058 {
1059 }
1060
1061 void User::Write(const char *text, ...)
1062 {
1063 }
1064
1065 void LocalUser::Write(const std::string& text)
1066 {
1067         if (!ServerInstance->SE->BoundsCheckFd(this))
1068                 return;
1069
1070         if (text.length() > MAXBUF - 2)
1071         {
1072                 // this should happen rarely or never. Crop the string at 512 and try again.
1073                 std::string try_again = text.substr(0, MAXBUF - 2);
1074                 Write(try_again);
1075                 return;
1076         }
1077
1078         ServerInstance->Logs->Log("USEROUTPUT", DEBUG,"C[%d] O %s", this->GetFd(), text.c_str());
1079
1080         this->AddWriteBuf(text);
1081         this->AddWriteBuf(wide_newline);
1082
1083         ServerInstance->stats->statsSent += text.length() + 2;
1084         this->bytes_out += text.length() + 2;
1085         this->cmds_out++;
1086 }
1087
1088 /** Write()
1089  */
1090 void LocalUser::Write(const char *text, ...)
1091 {
1092         va_list argsPtr;
1093         char textbuffer[MAXBUF];
1094
1095         va_start(argsPtr, text);
1096         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1097         va_end(argsPtr);
1098
1099         this->Write(std::string(textbuffer));
1100 }
1101
1102 void User::WriteServ(const std::string& text)
1103 {
1104         this->Write(":%s %s",ServerInstance->Config->ServerName.c_str(),text.c_str());
1105 }
1106
1107 /** WriteServ()
1108  *  Same as Write(), except `text' is prefixed with `:server.name '.
1109  */
1110 void User::WriteServ(const char* text, ...)
1111 {
1112         va_list argsPtr;
1113         char textbuffer[MAXBUF];
1114
1115         va_start(argsPtr, text);
1116         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1117         va_end(argsPtr);
1118
1119         this->WriteServ(std::string(textbuffer));
1120 }
1121
1122
1123 void User::WriteNumeric(unsigned int numeric, const char* text, ...)
1124 {
1125         va_list argsPtr;
1126         char textbuffer[MAXBUF];
1127
1128         va_start(argsPtr, text);
1129         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1130         va_end(argsPtr);
1131
1132         this->WriteNumeric(numeric, std::string(textbuffer));
1133 }
1134
1135 void User::WriteNumeric(unsigned int numeric, const std::string &text)
1136 {
1137         char textbuffer[MAXBUF];
1138         ModResult MOD_RESULT;
1139
1140         FIRST_MOD_RESULT(OnNumeric, MOD_RESULT, (this, numeric, text));
1141
1142         if (MOD_RESULT == MOD_RES_DENY)
1143                 return;
1144
1145         snprintf(textbuffer,MAXBUF,":%s %03u %s",ServerInstance->Config->ServerName.c_str(), numeric, text.c_str());
1146         this->Write(std::string(textbuffer));
1147 }
1148
1149 void User::WriteFrom(User *user, const std::string &text)
1150 {
1151         char tb[MAXBUF];
1152
1153         snprintf(tb,MAXBUF,":%s %s",user->GetFullHost().c_str(),text.c_str());
1154
1155         this->Write(std::string(tb));
1156 }
1157
1158
1159 /* write text from an originating user to originating user */
1160
1161 void User::WriteFrom(User *user, const char* text, ...)
1162 {
1163         va_list argsPtr;
1164         char textbuffer[MAXBUF];
1165
1166         va_start(argsPtr, text);
1167         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1168         va_end(argsPtr);
1169
1170         this->WriteFrom(user, std::string(textbuffer));
1171 }
1172
1173
1174 /* write text to an destination user from a source user (e.g. user privmsg) */
1175
1176 void User::WriteTo(User *dest, const char *data, ...)
1177 {
1178         char textbuffer[MAXBUF];
1179         va_list argsPtr;
1180
1181         va_start(argsPtr, data);
1182         vsnprintf(textbuffer, MAXBUF, data, argsPtr);
1183         va_end(argsPtr);
1184
1185         this->WriteTo(dest, std::string(textbuffer));
1186 }
1187
1188 void User::WriteTo(User *dest, const std::string &data)
1189 {
1190         dest->WriteFrom(this, data);
1191 }
1192
1193 void User::WriteCommon(const char* text, ...)
1194 {
1195         char textbuffer[MAXBUF];
1196         va_list argsPtr;
1197
1198         if (this->registered != REG_ALL || quitting)
1199                 return;
1200
1201         int len = snprintf(textbuffer,MAXBUF,":%s ",this->GetFullHost().c_str());
1202
1203         va_start(argsPtr, text);
1204         vsnprintf(textbuffer + len, MAXBUF - len, text, argsPtr);
1205         va_end(argsPtr);
1206
1207         this->WriteCommonRaw(std::string(textbuffer), true);
1208 }
1209
1210 void User::WriteCommonExcept(const char* text, ...)
1211 {
1212         char textbuffer[MAXBUF];
1213         va_list argsPtr;
1214
1215         if (this->registered != REG_ALL || quitting)
1216                 return;
1217
1218         int len = snprintf(textbuffer,MAXBUF,":%s ",this->GetFullHost().c_str());
1219
1220         va_start(argsPtr, text);
1221         vsnprintf(textbuffer + len, MAXBUF - len, text, argsPtr);
1222         va_end(argsPtr);
1223
1224         this->WriteCommonRaw(std::string(textbuffer), false);
1225 }
1226
1227 void User::WriteCommonRaw(const std::string &line, bool include_self)
1228 {
1229         if (this->registered != REG_ALL || quitting)
1230                 return;
1231
1232         uniq_id_t uniq_id = ++already_sent;
1233
1234         UserChanList include_c(chans);
1235         std::map<User*,bool> exceptions;
1236
1237         exceptions[this] = include_self;
1238
1239         FOREACH_MOD(I_OnBuildNeighborList,OnBuildNeighborList(this, include_c, exceptions));
1240
1241         for (std::map<User*,bool>::iterator i = exceptions.begin(); i != exceptions.end(); ++i)
1242         {
1243                 User* u = i->first;
1244                 if (IS_LOCAL(u) && !u->quitting)
1245                 {
1246                         already_sent[u->fd] = uniq_id;
1247                         if (i->second)
1248                                 u->Write(line);
1249                 }
1250         }
1251         for (UCListIter v = include_c.begin(); v != include_c.end(); ++v)
1252         {
1253                 Channel* c = *v;
1254                 const UserMembList* ulist = c->GetUsers();
1255                 for (UserMembList::const_iterator i = ulist->begin(); i != ulist->end(); i++)
1256                 {
1257                         User* u = i->first;
1258                         if (IS_LOCAL(u) && !u->quitting && already_sent[u->fd] != uniq_id)
1259                         {
1260                                 already_sent[u->fd] = uniq_id;
1261                                 u->Write(line);
1262                         }
1263                 }
1264         }
1265 }
1266
1267 void User::WriteCommonQuit(const std::string &normal_text, const std::string &oper_text)
1268 {
1269         char tb1[MAXBUF];
1270         char tb2[MAXBUF];
1271
1272         if (this->registered != REG_ALL)
1273                 return;
1274
1275         uniq_id_t uniq_id = ++already_sent;
1276
1277         snprintf(tb1,MAXBUF,":%s QUIT :%s",this->GetFullHost().c_str(),normal_text.c_str());
1278         snprintf(tb2,MAXBUF,":%s QUIT :%s",this->GetFullHost().c_str(),oper_text.c_str());
1279         std::string out1 = tb1;
1280         std::string out2 = tb2;
1281
1282         UserChanList include_c(chans);
1283         std::map<User*,bool> exceptions;
1284
1285         FOREACH_MOD(I_OnBuildNeighborList,OnBuildNeighborList(this, include_c, exceptions));
1286
1287         for (std::map<User*,bool>::iterator i = exceptions.begin(); i != exceptions.end(); ++i)
1288         {
1289                 User* u = i->first;
1290                 if (IS_LOCAL(u) && !u->quitting)
1291                 {
1292                         already_sent[u->fd] = uniq_id;
1293                         if (i->second)
1294                                 u->Write(IS_OPER(u) ? out2 : out1);
1295                 }
1296         }
1297         for (UCListIter v = include_c.begin(); v != include_c.end(); ++v)
1298         {
1299                 const UserMembList* ulist = (*v)->GetUsers();
1300                 for (UserMembList::const_iterator i = ulist->begin(); i != ulist->end(); i++)
1301                 {
1302                         User* u = i->first;
1303                         if (IS_LOCAL(u) && !u->quitting && (already_sent[u->fd] != uniq_id))
1304                         {
1305                                 already_sent[u->fd] = uniq_id;
1306                                 u->Write(IS_OPER(u) ? out2 : out1);
1307                         }
1308                 }
1309         }
1310 }
1311
1312 void LocalUser::SendText(const std::string& line)
1313 {
1314         Write(line);
1315 }
1316
1317 void RemoteUser::SendText(const std::string& line)
1318 {
1319         ServerInstance->PI->PushToClient(this, line);
1320 }
1321
1322 void FakeUser::SendText(const std::string& line)
1323 {
1324 }
1325
1326 void User::SendText(const char *text, ...)
1327 {
1328         va_list argsPtr;
1329         char line[MAXBUF];
1330
1331         va_start(argsPtr, text);
1332         vsnprintf(line, MAXBUF, text, argsPtr);
1333         va_end(argsPtr);
1334
1335         SendText(std::string(line));
1336 }
1337
1338 void User::SendText(const std::string &LinePrefix, std::stringstream &TextStream)
1339 {
1340         char line[MAXBUF];
1341         int start_pos = LinePrefix.length();
1342         int pos = start_pos;
1343         memcpy(line, LinePrefix.data(), pos);
1344         std::string Word;
1345         while (TextStream >> Word)
1346         {
1347                 int len = Word.length();
1348                 if (pos + len + 12 > MAXBUF)
1349                 {
1350                         line[pos] = '\0';
1351                         SendText(std::string(line));
1352                         pos = start_pos;
1353                 }
1354                 line[pos] = ' ';
1355                 memcpy(line + pos + 1, Word.data(), len);
1356                 pos += len + 1;
1357         }
1358         line[pos] = '\0';
1359         SendText(std::string(line));
1360 }
1361
1362 /* return 0 or 1 depending if users u and u2 share one or more common channels
1363  * (used by QUIT, NICK etc which arent channel specific notices)
1364  *
1365  * The old algorithm in 1.0 for this was relatively inefficient, iterating over
1366  * the first users channels then the second users channels within the outer loop,
1367  * therefore it was a maximum of x*y iterations (upon returning 0 and checking
1368  * all possible iterations). However this new function instead checks against the
1369  * channel's userlist in the inner loop which is a std::map<User*,User*>
1370  * and saves us time as we already know what pointer value we are after.
1371  * Don't quote me on the maths as i am not a mathematician or computer scientist,
1372  * but i believe this algorithm is now x+(log y) maximum iterations instead.
1373  */
1374 bool User::SharesChannelWith(User *other)
1375 {
1376         if ((!other) || (this->registered != REG_ALL) || (other->registered != REG_ALL))
1377                 return false;
1378
1379         /* Outer loop */
1380         for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1381         {
1382                 /* Eliminate the inner loop (which used to be ~equal in size to the outer loop)
1383                  * by replacing it with a map::find which *should* be more efficient
1384                  */
1385                 if ((*i)->HasUser(other))
1386                         return true;
1387         }
1388         return false;
1389 }
1390
1391 bool User::ChangeName(const char* gecos)
1392 {
1393         if (!this->fullname.compare(gecos))
1394                 return true;
1395
1396         if (IS_LOCAL(this))
1397         {
1398                 ModResult MOD_RESULT;
1399                 FIRST_MOD_RESULT(OnChangeLocalUserGECOS, MOD_RESULT, (IS_LOCAL(this),gecos));
1400                 if (MOD_RESULT == MOD_RES_DENY)
1401                         return false;
1402                 FOREACH_MOD(I_OnChangeName,OnChangeName(this,gecos));
1403         }
1404         this->fullname.assign(gecos, 0, ServerInstance->Config->Limits.MaxGecos);
1405
1406         return true;
1407 }
1408
1409 void User::DoHostCycle(const std::string &quitline)
1410 {
1411         char buffer[MAXBUF];
1412
1413         if (!ServerInstance->Config->CycleHosts)
1414                 return;
1415
1416         uniq_id_t silent_id = ++already_sent;
1417         uniq_id_t seen_id = ++already_sent;
1418
1419         UserChanList include_c(chans);
1420         std::map<User*,bool> exceptions;
1421
1422         FOREACH_MOD(I_OnBuildNeighborList,OnBuildNeighborList(this, include_c, exceptions));
1423
1424         for (std::map<User*,bool>::iterator i = exceptions.begin(); i != exceptions.end(); ++i)
1425         {
1426                 User* u = i->first;
1427                 if (IS_LOCAL(u) && !u->quitting)
1428                 {
1429                         if (i->second)
1430                         {
1431                                 already_sent[u->fd] = seen_id;
1432                                 u->Write(quitline);
1433                         }
1434                         else
1435                         {
1436                                 already_sent[u->fd] = silent_id;
1437                         }
1438                 }
1439         }
1440         for (UCListIter v = include_c.begin(); v != include_c.end(); ++v)
1441         {
1442                 Channel* c = *v;
1443                 snprintf(buffer, MAXBUF, ":%s JOIN %s", GetFullHost().c_str(), c->name.c_str());
1444                 std::string joinline(buffer);
1445                 std::string modeline = ServerInstance->Modes->ModeString(this, c);
1446                 if (modeline.length() > 0)
1447                 {
1448                         snprintf(buffer, MAXBUF, ":%s MODE %s +%s", GetFullHost().c_str(), c->name.c_str(), modeline.c_str());
1449                         modeline = buffer;
1450                 }
1451
1452                 const UserMembList *ulist = c->GetUsers();
1453                 for (UserMembList::const_iterator i = ulist->begin(); i != ulist->end(); i++)
1454                 {
1455                         User* u = i->first;
1456                         if (u == this || !IS_LOCAL(u))
1457                                 continue;
1458                         if (already_sent[u->fd] == silent_id)
1459                                 continue;
1460
1461                         if (already_sent[u->fd] != seen_id)
1462                         {
1463                                 u->Write(quitline);
1464                                 already_sent[i->first->fd] = seen_id;
1465                         }
1466                         u->Write(joinline);
1467                         if (modeline.length() > 0)
1468                                 u->Write(modeline);
1469                 }
1470         }
1471 }
1472
1473 bool User::ChangeDisplayedHost(const char* shost)
1474 {
1475         if (dhost == shost)
1476                 return true;
1477
1478         if (IS_LOCAL(this))
1479         {
1480                 ModResult MOD_RESULT;
1481                 FIRST_MOD_RESULT(OnChangeLocalUserHost, MOD_RESULT, (IS_LOCAL(this),shost));
1482                 if (MOD_RESULT == MOD_RES_DENY)
1483                         return false;
1484         }
1485
1486         FOREACH_MOD(I_OnChangeHost, OnChangeHost(this,shost));
1487
1488         std::string quitstr = ":" + GetFullHost() + " QUIT :Changing host";
1489
1490         /* Fix by Om: User::dhost is 65 long, this was truncating some long hosts */
1491         this->dhost.assign(shost, 0, 64);
1492
1493         this->InvalidateCache();
1494
1495         this->DoHostCycle(quitstr);
1496
1497         if (IS_LOCAL(this))
1498                 this->WriteNumeric(RPL_YOURDISPLAYEDHOST, "%s %s :is now your displayed host",this->nick.c_str(),this->dhost.c_str());
1499
1500         return true;
1501 }
1502
1503 bool User::ChangeIdent(const char* newident)
1504 {
1505         if (this->ident == newident)
1506                 return true;
1507
1508         FOREACH_MOD(I_OnChangeIdent, OnChangeIdent(this,newident));
1509
1510         std::string quitstr = ":" + GetFullHost() + " QUIT :Changing ident";
1511
1512         this->ident.assign(newident, 0, ServerInstance->Config->Limits.IdentMax + 1);
1513
1514         this->InvalidateCache();
1515
1516         this->DoHostCycle(quitstr);
1517
1518         return true;
1519 }
1520
1521 void User::SendAll(const char* command, const char* text, ...)
1522 {
1523         char textbuffer[MAXBUF];
1524         char formatbuffer[MAXBUF];
1525         va_list argsPtr;
1526
1527         va_start(argsPtr, text);
1528         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1529         va_end(argsPtr);
1530
1531         snprintf(formatbuffer,MAXBUF,":%s %s $* :%s", this->GetFullHost().c_str(), command, textbuffer);
1532         std::string fmt = formatbuffer;
1533
1534         for (std::vector<LocalUser*>::const_iterator i = ServerInstance->Users->local_users.begin(); i != ServerInstance->Users->local_users.end(); i++)
1535         {
1536                 (*i)->Write(fmt);
1537         }
1538 }
1539
1540
1541 std::string User::ChannelList(User* source, bool spy)
1542 {
1543         std::string list;
1544
1545         for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1546         {
1547                 Channel* c = *i;
1548                 /* If the target is the sender, neither +p nor +s is set, or
1549                  * the channel contains the user, it is not a spy channel
1550                  */
1551                 if (spy != (source == this || !(c->IsModeSet('p') || c->IsModeSet('s')) || c->HasUser(source)))
1552                         list.append(c->GetPrefixChar(this)).append(c->name).append(" ");
1553         }
1554
1555         return list;
1556 }
1557
1558 void User::SplitChanList(User* dest, const std::string &cl)
1559 {
1560         std::string line;
1561         std::ostringstream prefix;
1562         std::string::size_type start, pos, length;
1563
1564         prefix << this->nick << " " << dest->nick << " :";
1565         line = prefix.str();
1566         int namelen = ServerInstance->Config->ServerName.length() + 6;
1567
1568         for (start = 0; (pos = cl.find(' ', start)) != std::string::npos; start = pos+1)
1569         {
1570                 length = (pos == std::string::npos) ? cl.length() : pos;
1571
1572                 if (line.length() + namelen + length - start > 510)
1573                 {
1574                         ServerInstance->SendWhoisLine(this, dest, 319, "%s", line.c_str());
1575                         line = prefix.str();
1576                 }
1577
1578                 if(pos == std::string::npos)
1579                 {
1580                         line.append(cl.substr(start, length - start));
1581                         break;
1582                 }
1583                 else
1584                 {
1585                         line.append(cl.substr(start, length - start + 1));
1586                 }
1587         }
1588
1589         if (line.length())
1590         {
1591                 ServerInstance->SendWhoisLine(this, dest, 319, "%s", line.c_str());
1592         }
1593 }
1594
1595 /*
1596  * Sets a user's connection class.
1597  * If the class name is provided, it will be used. Otherwise, the class will be guessed using host/ip/ident/etc.
1598  * NOTE: If the <ALLOW> or <DENY> tag specifies an ip, and this user resolves,
1599  * then their ip will be taken as 'priority' anyway, so for example,
1600  * <connect allow="127.0.0.1"> will match joe!bloggs@localhost
1601  */
1602 void LocalUser::SetClass(const std::string &explicit_name)
1603 {
1604         ConnectClass *found = NULL;
1605
1606         ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Setting connect class for UID %s", this->uuid.c_str());
1607
1608         if (!explicit_name.empty())
1609         {
1610                 for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++)
1611                 {
1612                         ConnectClass* c = *i;
1613
1614                         if (explicit_name == c->name)
1615                         {
1616                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Explicitly set to %s", explicit_name.c_str());
1617                                 found = c;
1618                         }
1619                 }
1620         }
1621         else
1622         {
1623                 for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++)
1624                 {
1625                         ConnectClass* c = *i;
1626
1627                         if (c->type == CC_ALLOW)
1628                         {
1629                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "ALLOW %s %d %s", c->host.c_str(), c->GetPort(), c->GetName().c_str());
1630                         }
1631                         else
1632                         {
1633                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "DENY %s %d %s", c->GetHost().c_str(), c->GetPort(), c->GetName().c_str());
1634                         }
1635
1636                         /* check if host matches.. */
1637                         if (c->GetHost().length() && !InspIRCd::MatchCIDR(this->GetIPString(), c->GetHost(), NULL) &&
1638                             !InspIRCd::MatchCIDR(this->host, c->GetHost(), NULL))
1639                         {
1640                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "No host match (for %s)", c->GetHost().c_str());
1641                                 continue;
1642                         }
1643
1644                         /*
1645                          * deny change if change will take class over the limit check it HERE, not after we found a matching class,
1646                          * because we should attempt to find another class if this one doesn't match us. -- w00t
1647                          */
1648                         if (c->limit && (c->GetReferenceCount() >= c->limit))
1649                         {
1650                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "OOPS: Connect class limit (%lu) hit, denying", c->limit);
1651                                 continue;
1652                         }
1653
1654                         /* if it requires a port ... */
1655                         if (c->GetPort())
1656                         {
1657                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Requires port (%d)", c->GetPort());
1658
1659                                 /* and our port doesn't match, fail. */
1660                                 if (this->GetServerPort() != c->GetPort())
1661                                 {
1662                                         ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Port match failed (%d)", this->GetServerPort());
1663                                         continue;
1664                                 }
1665                         }
1666
1667                         /* we stop at the first class that meets ALL critera. */
1668                         found = c;
1669                         break;
1670                 }
1671         }
1672
1673         /*
1674          * Okay, assuming we found a class that matches.. switch us into that class, keeping refcounts up to date.
1675          */
1676         if (found)
1677         {
1678                 MyClass = found;
1679         }
1680 }
1681
1682 /* looks up a users password for their connection class (<ALLOW>/<DENY> tags)
1683  * NOTE: If the <ALLOW> or <DENY> tag specifies an ip, and this user resolves,
1684  * then their ip will be taken as 'priority' anyway, so for example,
1685  * <connect allow="127.0.0.1"> will match joe!bloggs@localhost
1686  */
1687 ConnectClass* LocalUser::GetClass()
1688 {
1689         return MyClass;
1690 }
1691
1692 ConnectClass* User::GetClass()
1693 {
1694         return NULL;
1695 }
1696
1697 void User::PurgeEmptyChannels()
1698 {
1699         // firstly decrement the count on each channel
1700         for (UCListIter f = this->chans.begin(); f != this->chans.end(); f++)
1701         {
1702                 Channel* c = *f;
1703                 c->DelUser(this);
1704         }
1705
1706         this->UnOper();
1707 }
1708
1709 void User::ShowMOTD()
1710 {
1711         if (!ServerInstance->Config->MOTD.size())
1712         {
1713                 this->WriteNumeric(ERR_NOMOTD, "%s :Message of the day file is missing.",this->nick.c_str());
1714                 return;
1715         }
1716         this->WriteNumeric(RPL_MOTDSTART, "%s :%s message of the day", this->nick.c_str(), ServerInstance->Config->ServerName.c_str());
1717
1718         for (file_cache::iterator i = ServerInstance->Config->MOTD.begin(); i != ServerInstance->Config->MOTD.end(); i++)
1719                 this->WriteNumeric(RPL_MOTD, "%s :- %s",this->nick.c_str(),i->c_str());
1720
1721         this->WriteNumeric(RPL_ENDOFMOTD, "%s :End of message of the day.", this->nick.c_str());
1722 }
1723
1724 void User::ShowRULES()
1725 {
1726         if (!ServerInstance->Config->RULES.size())
1727         {
1728                 this->WriteNumeric(ERR_NORULES, "%s :RULES File is missing",this->nick.c_str());
1729                 return;
1730         }
1731
1732         this->WriteNumeric(RPL_RULESTART, "%s :- %s Server Rules -",this->nick.c_str(),ServerInstance->Config->ServerName.c_str());
1733
1734         for (file_cache::iterator i = ServerInstance->Config->RULES.begin(); i != ServerInstance->Config->RULES.end(); i++)
1735                 this->WriteNumeric(RPL_RULES, "%s :- %s",this->nick.c_str(),i->c_str());
1736
1737         this->WriteNumeric(RPL_RULESEND, "%s :End of RULES command.",this->nick.c_str());
1738 }
1739
1740 void FakeUser::SetFakeServer(std::string name)
1741 {
1742         this->nick = name;
1743         this->server = name;
1744 }
1745
1746 const std::string FakeUser::GetFullHost()
1747 {
1748         if (!ServerInstance->Config->HideWhoisServer.empty())
1749                 return ServerInstance->Config->HideWhoisServer;
1750         return nick;
1751 }
1752
1753 const std::string FakeUser::GetFullRealHost()
1754 {
1755         if (!ServerInstance->Config->HideWhoisServer.empty())
1756                 return ServerInstance->Config->HideWhoisServer;
1757         return nick;
1758 }
1759
1760 ConnectClass::ConnectClass(ConfigTag* tag, char t, const std::string& mask)
1761         : config(tag), type(t), name("unnamed"), registration_timeout(0), host(mask),
1762         pingtime(0), pass(""), hash(""), softsendqmax(0), hardsendqmax(0),
1763         recvqmax(0), penaltythreshold(0), maxlocal(0), maxglobal(0), maxchans(0), port(0), limit(0)
1764 {
1765 }
1766
1767 ConnectClass::ConnectClass(ConfigTag* tag, char t, const std::string& mask, const ConnectClass& parent)
1768         : config(tag), type(t), name("unnamed"),
1769         registration_timeout(parent.registration_timeout), host(mask),
1770         pingtime(parent.pingtime), pass(parent.pass), hash(parent.hash),
1771         softsendqmax(parent.softsendqmax), hardsendqmax(parent.hardsendqmax),
1772         recvqmax(parent.recvqmax), penaltythreshold(parent.penaltythreshold), maxlocal(parent.maxlocal),
1773         maxglobal(parent.maxglobal), maxchans(parent.maxchans),
1774         port(parent.port), limit(parent.limit)
1775 {
1776 }
1777
1778 void ConnectClass::Update(const ConnectClass* src)
1779 {
1780         name = src->name;
1781         registration_timeout = src->registration_timeout;
1782         host = src->host;
1783         pingtime = src->pingtime;
1784         pass = src->pass;
1785         hash = src->hash;
1786         softsendqmax = src->softsendqmax;
1787         hardsendqmax = src->hardsendqmax;
1788         recvqmax = src->recvqmax;
1789         penaltythreshold = src->penaltythreshold;
1790         maxlocal = src->maxlocal;
1791         maxglobal = src->maxglobal;
1792         limit = src->limit;
1793 }