src/users.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2010 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 User::User(const std::string &uid, const std::string& sid, int type)
 207         : uuid(uid), server(sid), usertype(type)
 208 {
 209         age = ServerInstance->Time();
 210         signon = idle_lastmsg = 0;
 211         registered = 0;
 212         quietquit = quitting = exempt = dns_done = false;
 213         client_sa.sa.sa_family = AF_UNSPEC;
 214
 215         ServerInstance->Logs->Log("USERS", DEBUG, "New UUID for user: %s", uuid.c_str());
 216
 217         user_hash::iterator finduuid = ServerInstance->Users->uuidlist->find(uuid);
 218         if (finduuid == ServerInstance->Users->uuidlist->end())
 219                 (*ServerInstance->Users->uuidlist)[uuid] = this;
 220         else
 221                 throw CoreException("Duplicate UUID "+std::string(uuid)+" in User constructor");
 222 }
 223
 224 LocalUser::LocalUser(int myfd, irc::sockets::sockaddrs* client, irc::sockets::sockaddrs* servaddr)
 225         : User(ServerInstance->GetUID(), ServerInstance->Config->ServerName, USERTYPE_LOCAL), eh(this)
 226 {
 227         bytes_in = bytes_out = cmds_in = cmds_out = 0;
 228         server_sa.sa.sa_family = AF_UNSPEC;
 229         CommandFloodPenalty = 0;
 230         lastping = nping = 0;
 231         eh.SetFd(myfd);
 232         memcpy(&client_sa, client, sizeof(irc::sockets::sockaddrs));
 233         memcpy(&server_sa, servaddr, sizeof(irc::sockets::sockaddrs));
 234 }
 235
 236 User::~User()
 237 {
 238         if (ServerInstance->Users->uuidlist->find(uuid) != ServerInstance->Users->uuidlist->end())
 239                 ServerInstance->Logs->Log("USERS", DEFAULT, "User destructor for %s called without cull", uuid.c_str());
 240 }
 241
 242 const std::string& User::MakeHost()
 243 {
 244         if (!this->cached_makehost.empty())
 245                 return this->cached_makehost;
 246
 247         char nhost[MAXBUF];
 248         /* This is much faster than snprintf */
 249         char* t = nhost;
 250         for(const char* n = ident.c_str(); *n; n++)
 251                 *t++ = *n;
 252         *t++ = '@';
 253         for(const char* n = host.c_str(); *n; n++)
 254                 *t++ = *n;
 255         *t = 0;
 256
 257         this->cached_makehost.assign(nhost);
 258
 259         return this->cached_makehost;
 260 }
 261
 262 const std::string& User::MakeHostIP()
 263 {
 264         if (!this->cached_hostip.empty())
 265                 return this->cached_hostip;
 266
 267         char ihost[MAXBUF];
 268         /* This is much faster than snprintf */
 269         char* t = ihost;
 270         for(const char* n = ident.c_str(); *n; n++)
 271                 *t++ = *n;
 272         *t++ = '@';
 273         for(const char* n = this->GetIPString(); *n; n++)
 274                 *t++ = *n;
 275         *t = 0;
 276
 277         this->cached_hostip = ihost;
 278
 279         return this->cached_hostip;
 280 }
 281
 282 const std::string& User::GetFullHost()
 283 {
 284         if (!this->cached_fullhost.empty())
 285                 return this->cached_fullhost;
 286
 287         char result[MAXBUF];
 288         char* t = result;
 289         for(const char* n = nick.c_str(); *n; n++)
 290                 *t++ = *n;
 291         *t++ = '!';
 292         for(const char* n = ident.c_str(); *n; n++)
 293                 *t++ = *n;
 294         *t++ = '@';
 295         for(const char* n = dhost.c_str(); *n; n++)
 296                 *t++ = *n;
 297         *t = 0;
 298
 299         this->cached_fullhost = result;
 300
 301         return this->cached_fullhost;
 302 }
 303
 304 char* User::MakeWildHost()
 305 {
 306         static char nresult[MAXBUF];
 307         char* t = nresult;
 308         *t++ = '*';     *t++ = '!';
 309         *t++ = '*';     *t++ = '@';
 310         for(const char* n = dhost.c_str(); *n; n++)
 311                 *t++ = *n;
 312         *t = 0;
 313         return nresult;
 314 }
 315
 316 const std::string& User::GetFullRealHost()
 317 {
 318         if (!this->cached_fullrealhost.empty())
 319                 return this->cached_fullrealhost;
 320
 321         char fresult[MAXBUF];
 322         char* t = fresult;
 323         for(const char* n = nick.c_str(); *n; n++)
 324                 *t++ = *n;
 325         *t++ = '!';
 326         for(const char* n = ident.c_str(); *n; n++)
 327                 *t++ = *n;
 328         *t++ = '@';
 329         for(const char* n = host.c_str(); *n; n++)
 330                 *t++ = *n;
 331         *t = 0;
 332
 333         this->cached_fullrealhost = fresult;
 334
 335         return this->cached_fullrealhost;
 336 }
 337
 338 bool LocalUser::IsInvited(const irc::string &channel)
 339 {
 340         time_t now = ServerInstance->Time();
 341         InvitedList::iterator safei;
 342         for (InvitedList::iterator i = invites.begin(); i != invites.end(); ++i)
 343         {
 344                 if (channel == i->first)
 345                 {
 346                         if (i->second != 0 && now > i->second)
 347                         {
 348                                 /* Expired invite, remove it. */
 349                                 safei = i;
 350                                 --i;
 351                                 invites.erase(safei);
 352                                 continue;
 353                         }
 354                         return true;
 355                 }
 356         }
 357         return false;
 358 }
 359
 360 InvitedList* LocalUser::GetInviteList()
 361 {
 362         time_t now = ServerInstance->Time();
 363         /* Weed out expired invites here. */
 364         InvitedList::iterator safei;
 365         for (InvitedList::iterator i = invites.begin(); i != invites.end(); ++i)
 366         {
 367                 if (i->second != 0 && now > i->second)
 368                 {
 369                         /* Expired invite, remove it. */
 370                         safei = i;
 371                         --i;
 372                         invites.erase(safei);
 373                 }
 374         }
 375         return &invites;
 376 }
 377
 378 void LocalUser::InviteTo(const irc::string &channel, time_t invtimeout)
 379 {
 380         time_t now = ServerInstance->Time();
 381         if (invtimeout != 0 && now > invtimeout) return; /* Don't add invites that are expired from the get-go. */
 382         for (InvitedList::iterator i = invites.begin(); i != invites.end(); ++i)
 383         {
 384                 if (channel == i->first)
 385                 {
 386                         if (i->second != 0 && invtimeout > i->second)
 387                         {
 388                                 i->second = invtimeout;
 389                         }
 390
 391                         return;
 392                 }
 393         }
 394         invites.push_back(std::make_pair(channel, invtimeout));
 395 }
 396
 397 void LocalUser::RemoveInvite(const irc::string &channel)
 398 {
 399         for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
 400         {
 401                 if (channel == i->first)
 402                 {
 403                         invites.erase(i);
 404                         return;
 405                 }
 406         }
 407 }
 408
 409 bool User::HasModePermission(unsigned char, ModeType)
 410 {
 411         return true;
 412 }
 413
 414 bool LocalUser::HasModePermission(unsigned char mode, ModeType type)
 415 {
 416         if (!IS_OPER(this))
 417                 return false;
 418
 419         if (mode < 'A' || mode > ('A' + 64)) return false;
 420
 421         return ((type == MODETYPE_USER ? oper->AllowedUserModes : oper->AllowedChanModes))[(mode - 'A')];
 422
 423 }
 424 /*
 425  * users on remote servers can completely bypass all permissions based checks.
 426  * This prevents desyncs when one server has different type/class tags to another.
 427  * That having been said, this does open things up to the possibility of source changes
 428  * allowing remote kills, etc - but if they have access to the src, they most likely have
 429  * access to the conf - so it's an end to a means either way.
 430  */
 431 bool User::HasPermission(const std::string&)
 432 {
 433         return true;
 434 }
 435
 436 bool LocalUser::HasPermission(const std::string &command)
 437 {
 438         // are they even an oper at all?
 439         if (!IS_OPER(this))
 440         {
 441                 return false;
 442         }
 443
 444         if (oper->AllowedOperCommands.find(command) != oper->AllowedOperCommands.end())
 445                 return true;
 446         else if (oper->AllowedOperCommands.find("*") != oper->AllowedOperCommands.end())
 447                 return true;
 448
 449         return false;
 450 }
 451
 452 bool User::HasPrivPermission(const std::string &privstr, bool noisy)
 453 {
 454         return true;
 455 }
 456
 457 bool LocalUser::HasPrivPermission(const std::string &privstr, bool noisy)
 458 {
 459         if (!IS_OPER(this))
 460         {
 461                 if (noisy)
 462                         this->WriteServ("NOTICE %s :You are not an oper", this->nick.c_str());
 463                 return false;
 464         }
 465
 466         if (oper->AllowedPrivs.find(privstr) != oper->AllowedPrivs.end())
 467         {
 468                 return true;
 469         }
 470         else if (oper->AllowedPrivs.find("*") != oper->AllowedPrivs.end())
 471         {
 472                 return true;
 473         }
 474
 475         if (noisy)
 476                 this->WriteServ("NOTICE %s :Oper type %s does not have access to priv %s", this->nick.c_str(), oper->NameStr(), privstr.c_str());
 477         return false;
 478 }
 479
 480 void UserIOHandler::OnDataReady()
 481 {
 482         if (user->quitting)
 483                 return;
 484
 485         if (recvq.length() > user->MyClass->GetRecvqMax() && !user->HasPrivPermission("users/flood/increased-buffers"))
 486         {
 487                 ServerInstance->Users->QuitUser(user, "RecvQ exceeded");
 488                 ServerInstance->SNO->WriteToSnoMask('a', "User %s RecvQ of %lu exceeds connect class maximum of %lu",
 489                         user->nick.c_str(), (unsigned long)recvq.length(), user->MyClass->GetRecvqMax());
 490         }
 491         unsigned long sendqmax = ULONG_MAX;
 492         if (!user->HasPrivPermission("users/flood/increased-buffers"))
 493                 sendqmax = user->MyClass->GetSendqSoftMax();
 494         unsigned long penaltymax = ULONG_MAX;
 495         if (!user->HasPrivPermission("users/flood/no-fakelag"))
 496                 penaltymax = user->MyClass->GetPenaltyThreshold() * 1000;
 497
 498         while (user->CommandFloodPenalty < penaltymax && getSendQSize() < sendqmax)
 499         {
 500                 std::string line;
 501                 line.reserve(MAXBUF);
 502                 std::string::size_type qpos = 0;
 503                 while (qpos < recvq.length())
 504                 {
 505                         char c = recvq[qpos++];
 506                         switch (c)
 507                         {
 508                         case '\0':
 509                                 c = ' ';
 510                                 break;
 511                         case '\r':
 512                                 continue;
 513                         case '\n':
 514                                 goto eol_found;
 515                         }
 516                         if (line.length() < MAXBUF - 2)
 517                                 line.push_back(c);
 518                 }
 519                 // if we got here, the recvq ran out before we found a newline
 520                 return;
 521 eol_found:
 522                 // just found a newline. Terminate the string, and pull it out of recvq
 523                 recvq = recvq.substr(qpos);
 524
 525                 // TODO should this be moved to when it was inserted in recvq?
 526                 ServerInstance->stats->statsRecv += qpos;
 527                 user->bytes_in += qpos;
 528                 user->cmds_in++;
 529
 530                 ServerInstance->Parser->ProcessBuffer(line, user);
 531                 if (user->quitting)
 532                         return;
 533         }
 534         // Add pseudo-penalty so that we continue processing after sendq recedes
 535         if (user->CommandFloodPenalty == 0 && getSendQSize() >= sendqmax)
 536                 user->CommandFloodPenalty++;
 537         if (user->CommandFloodPenalty >= penaltymax && !user->MyClass->fakelag)
 538                 ServerInstance->Users->QuitUser(user, "Excess Flood");
 539 }
 540
 541 void UserIOHandler::AddWriteBuf(const std::string &data)
 542 {
 543         if (!user->quitting && getSendQSize() + data.length() > user->MyClass->GetSendqHardMax() &&
 544                 !user->HasPrivPermission("users/flood/increased-buffers"))
 545         {
 546                 /*
 547                  * Quit the user FIRST, because otherwise we could recurse
 548                  * here and hit the same limit.
 549                  */
 550                 ServerInstance->Users->QuitUser(user, "SendQ exceeded");
 551                 ServerInstance->SNO->WriteToSnoMask('a', "User %s SendQ exceeds connect class maximum of %lu",
 552                         user->nick.c_str(), user->MyClass->GetSendqHardMax());
 553                 return;
 554         }
 555
 556         // We still want to append data to the sendq of a quitting user,
 557         // e.g. their ERROR message that says 'closing link'
 558
 559         WriteData(data);
 560 }
 561
 562 void UserIOHandler::OnError(BufferedSocketError)
 563 {
 564         ServerInstance->Users->QuitUser(user, getError());
 565 }
 566
 567 CullResult User::cull()
 568 {
 569         if (!quitting)
 570                 ServerInstance->Users->QuitUser(this, "Culled without QuitUser");
 571         PurgeEmptyChannels();
 572
 573         this->InvalidateCache();
 574
 575         if (client_sa.sa.sa_family != AF_UNSPEC)
 576                 ServerInstance->Users->RemoveCloneCounts(this);
 577
 578         return Extensible::cull();
 579 }
 580
 581 CullResult LocalUser::cull()
 582 {
 583         std::vector<LocalUser*>::iterator x = find(ServerInstance->Users->local_users.begin(),ServerInstance->Users->local_users.end(),this);
 584         if (x != ServerInstance->Users->local_users.end())
 585                 ServerInstance->Users->local_users.erase(x);
 586         else
 587                 ServerInstance->Logs->Log("USERS", DEBUG, "Failed to remove user from vector");
 588
 589         eh.cull();
 590         return User::cull();
 591 }
 592
 593 CullResult FakeUser::cull()
 594 {
 595         // Fake users don't quit, they just get culled.
 596         quitting = true;
 597         ServerInstance->Users->clientlist->erase(nick);
 598         ServerInstance->Users->uuidlist->erase(uuid);
 599         return User::cull();
 600 }
 601
 602 void User::Oper(OperInfo* info)
 603 {
 604         if (this->IsModeSet('o'))
 605                 this->UnOper();
 606
 607         this->modes[UM_OPERATOR] = 1;
 608         this->oper = info;
 609         this->WriteServ("MODE %s :+o", this->nick.c_str());
 610         FOREACH_MOD(I_OnOper, OnOper(this, info->name));
 611
 612         std::string opername;
 613         if (info->oper_block)
 614                 opername = info->oper_block->getString("name");
 615
 616         if (IS_LOCAL(this))
 617         {
 618                 LocalUser* l = IS_LOCAL(this);
 619                 std::string vhost = oper->getConfig("vhost");
 620                 if (!vhost.empty())
 621                         l->ChangeDisplayedHost(vhost.c_str());
 622                 std::string opClass = oper->getConfig("class");
 623                 if (!opClass.empty())
 624                         l->SetClass(opClass);
 625         }
 626
 627         ServerInstance->SNO->WriteToSnoMask('o',"%s (%s@%s) is now an IRC operator of type %s (using oper '%s')",
 628                 nick.c_str(), ident.c_str(), host.c_str(), oper->NameStr(), opername.c_str());
 629         this->WriteNumeric(381, "%s :You are now %s %s", nick.c_str(), strchr("aeiouAEIOU", oper->name[0]) ? "an" : "a", oper->NameStr());
 630
 631         ServerInstance->Logs->Log("OPER", DEFAULT, "%s!%s@%s opered as type: %s", this->nick.c_str(), this->ident.c_str(), this->host.c_str(), oper->NameStr());
 632         ServerInstance->Users->all_opers.push_back(this);
 633
 634         // Expand permissions from config for faster lookup
 635         if (IS_LOCAL(this))
 636                 oper->init();
 637
 638         FOREACH_MOD(I_OnPostOper,OnPostOper(this, oper->name, opername));
 639 }
 640
 641 void OperInfo::init()
 642 {
 643         AllowedOperCommands.clear();
 644         AllowedPrivs.clear();
 645         AllowedUserModes.reset();
 646         AllowedChanModes.reset();
 647         AllowedUserModes['o' - 'A'] = true; // Call me paranoid if you want.
 648
 649         for(std::vector<reference<ConfigTag> >::iterator iter = class_blocks.begin(); iter != class_blocks.end(); ++iter)
 650         {
 651                 ConfigTag* tag = *iter;
 652                 std::string mycmd, mypriv;
 653                 /* Process commands */
 654                 irc::spacesepstream CommandList(tag->getString("commands"));
 655                 while (CommandList.GetToken(mycmd))
 656                 {
 657                         AllowedOperCommands.insert(mycmd);
 658                 }
 659
 660                 irc::spacesepstream PrivList(tag->getString("privs"));
 661                 while (PrivList.GetToken(mypriv))
 662                 {
 663                         AllowedPrivs.insert(mypriv);
 664                 }
 665
 666                 for (unsigned char* c = (unsigned char*)tag->getString("usermodes").c_str(); *c; ++c)
 667                 {
 668                         if (*c == '*')
 669                         {
 670                                 this->AllowedUserModes.set();
 671                         }
 672                         else
 673                         {
 674                                 this->AllowedUserModes[*c - 'A'] = true;
 675                         }
 676                 }
 677
 678                 for (unsigned char* c = (unsigned char*)tag->getString("chanmodes").c_str(); *c; ++c)
 679                 {
 680                         if (*c == '*')
 681                         {
 682                                 this->AllowedChanModes.set();
 683                         }
 684                         else
 685                         {
 686                                 this->AllowedChanModes[*c - 'A'] = true;
 687                         }
 688                 }
 689         }
 690 }
 691
 692 void User::UnOper()
 693 {
 694         if (!IS_OPER(this))
 695                 return;
 696
 697         /*
 698          * unset their oper type (what IS_OPER checks).
 699          * note, order is important - this must come before modes as -o attempts
 700          * to call UnOper. -- w00t
 701          */
 702         oper = NULL;
 703
 704
 705         /* Remove all oper only modes from the user when the deoper - Bug #466*/
 706         std::string moderemove("-");
 707
 708         for (unsigned char letter = 'A'; letter <= 'z'; letter++)
 709         {
 710                 ModeHandler* mh = ServerInstance->Modes->FindMode(letter, MODETYPE_USER);
 711                 if (mh && mh->NeedsOper())
 712                         moderemove += letter;
 713         }
 714
 715
 716         std::vector<std::string> parameters;
 717         parameters.push_back(this->nick);
 718         parameters.push_back(moderemove);
 719
 720         ServerInstance->Parser->CallHandler("MODE", parameters, this);
 721
 722         /* remove the user from the oper list. Will remove multiple entries as a safeguard against bug #404 */
 723         ServerInstance->Users->all_opers.remove(this);
 724
 725         this->modes[UM_OPERATOR] = 0;
 726 }
 727
 728 /* adds or updates an entry in the whowas list */
 729 void User::AddToWhoWas()
 730 {
 731         Module* whowas = ServerInstance->Modules->Find("cmd_whowas.so");
 732         if (whowas)
 733         {
 734                 WhowasRequest req(NULL, whowas, WhowasRequest::WHOWAS_ADD);
 735                 req.user = this;
 736                 req.Send();
 737         }
 738 }
 739
 740 /*
 741  * Check class restrictions
 742  */
 743 void LocalUser::CheckClass()
 744 {
 745         ConnectClass* a = this->MyClass;
 746
 747         if (!a)
 748         {
 749                 ServerInstance->Users->QuitUser(this, "Access denied by configuration");
 750         }
 751         else if (a->type == CC_DENY)
 752         {
 753                 ServerInstance->Users->QuitUser(this, "Unauthorised connection");
 754                 return;
 755         }
 756         else if ((a->GetMaxLocal()) && (ServerInstance->Users->LocalCloneCount(this) > a->GetMaxLocal()))
 757         {
 758                 ServerInstance->Users->QuitUser(this, "No more connections allowed from your host via this connect class (local)");
 759                 ServerInstance->SNO->WriteToSnoMask('a', "WARNING: maximum LOCAL connections (%ld) exceeded for IP %s", a->GetMaxLocal(), this->GetIPString());
 760                 return;
 761         }
 762         else if ((a->GetMaxGlobal()) && (ServerInstance->Users->GlobalCloneCount(this) > a->GetMaxGlobal()))
 763         {
 764                 ServerInstance->Users->QuitUser(this, "No more connections allowed from your host via this connect class (global)");
 765                 ServerInstance->SNO->WriteToSnoMask('a', "WARNING: maximum GLOBAL connections (%ld) exceeded for IP %s", a->GetMaxGlobal(), this->GetIPString());
 766                 return;
 767         }
 768
 769         this->nping = ServerInstance->Time() + a->GetPingTime() + ServerInstance->Config->dns_timeout;
 770 }
 771
 772 bool User::CheckLines(bool doZline)
 773 {
 774         const char* check[] = { "G" , "K", (doZline) ? "Z" : NULL, NULL };
 775
 776         if (!this->exempt)
 777         {
 778                 for (int n = 0; check[n]; ++n)
 779                 {
 780                         XLine *r = ServerInstance->XLines->MatchesLine(check[n], this);
 781
 782                         if (r)
 783                         {
 784                                 r->Apply(this);
 785                                 return true;
 786                         }
 787                 }
 788         }
 789
 790         return false;
 791 }
 792
 793 void LocalUser::FullConnect()
 794 {
 795         ServerInstance->stats->statsConnects++;
 796         this->idle_lastmsg = ServerInstance->Time();
 797
 798         /*
 799          * You may be thinking "wtf, we checked this in User::AddClient!" - and yes, we did, BUT.
 800          * At the time AddClient is called, we don't have a resolved host, by here we probably do - which
 801          * may put the user into a totally seperate class with different restrictions! so we *must* check again.
 802          * Don't remove this! -- w00t
 803          */
 804         this->SetClass();
 805
 806         /* Check the password, if one is required by the user's connect class.
 807          * This CANNOT be in CheckClass(), because that is called prior to PASS as well!
 808          */
 809         if (!MyClass->pass.empty())
 810         {
 811                 if (ServerInstance->PassCompare(this, MyClass->pass.c_str(), password.c_str(), MyClass->hash.c_str()))
 812                 {
 813                         ServerInstance->Users->QuitUser(this, "Invalid password");
 814                         return;
 815                 }
 816         }
 817         CheckClass();
 818         CheckLines();
 819
 820         if (quitting)
 821                 return;
 822
 823         this->WriteServ("NOTICE Auth :Welcome to \002%s\002!",ServerInstance->Config->Network.c_str());
 824         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());
 825         this->WriteNumeric(RPL_YOURHOSTIS, "%s :Your host is %s, running version InspIRCd-2.0",this->nick.c_str(),ServerInstance->Config->ServerName.c_str());
 826         this->WriteNumeric(RPL_SERVERCREATED, "%s :This server was created %s %s", this->nick.c_str(), __TIME__, __DATE__);
 827         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());
 828
 829         ServerInstance->Config->Send005(this);
 830         this->WriteNumeric(RPL_YOURUUID, "%s %s :your unique ID", this->nick.c_str(), this->uuid.c_str());
 831
 832         /* Now registered */
 833         if (ServerInstance->Users->unregistered_count)
 834                 ServerInstance->Users->unregistered_count--;
 835
 836         /* Trigger MOTD and LUSERS output, give modules a chance too */
 837         ModResult MOD_RESULT;
 838         std::string command("MOTD");
 839         std::vector<std::string> parameters;
 840         FIRST_MOD_RESULT(OnPreCommand, MOD_RESULT, (command, parameters, this, true, command));
 841         if (!MOD_RESULT)
 842                 ServerInstance->CallCommandHandler(command, parameters, this);
 843
 844         MOD_RESULT = MOD_RES_PASSTHRU;
 845         command = "LUSERS";
 846         FIRST_MOD_RESULT(OnPreCommand, MOD_RESULT, (command, parameters, this, true, command));
 847         if (!MOD_RESULT)
 848                 ServerInstance->CallCommandHandler(command, parameters, this);
 849
 850         /*
 851          * We don't set REG_ALL until triggering OnUserConnect, so some module events don't spew out stuff
 852          * for a user that doesn't exist yet.
 853          */
 854         FOREACH_MOD(I_OnUserConnect,OnUserConnect(this));
 855
 856         this->registered = REG_ALL;
 857
 858         FOREACH_MOD(I_OnPostConnect,OnPostConnect(this));
 859
 860         ServerInstance->SNO->WriteToSnoMask('c',"Client connecting on port %d: %s!%s@%s [%s] [%s]",
 861                 this->GetServerPort(), this->nick.c_str(), this->ident.c_str(), this->host.c_str(), this->GetIPString(), this->fullname.c_str());
 862         ServerInstance->Logs->Log("BANCACHE", DEBUG, "BanCache: Adding NEGATIVE hit for %s", this->GetIPString());
 863         ServerInstance->BanCache->AddHit(this->GetIPString(), "", "");
 864 }
 865
 866 void User::InvalidateCache()
 867 {
 868         /* Invalidate cache */
 869         cached_fullhost.clear();
 870         cached_hostip.clear();
 871         cached_makehost.clear();
 872         cached_fullrealhost.clear();
 873 }
 874
 875 bool User::ChangeNick(const std::string& newnick, bool force)
 876 {
 877         ModResult MOD_RESULT;
 878
 879         if (force)
 880                 ServerInstance->NICKForced.set(this, 1);
 881         FIRST_MOD_RESULT(OnUserPreNick, MOD_RESULT, (this, newnick));
 882         ServerInstance->NICKForced.set(this, 0);
 883
 884         if (MOD_RESULT == MOD_RES_DENY)
 885         {
 886                 ServerInstance->stats->statsCollisions++;
 887                 return false;
 888         }
 889
 890         if (assign(newnick) == assign(nick))
 891         {
 892                 // case change, don't need to check Q:lines and such
 893                 // and, if it's identical including case, we can leave right now
 894                 if (newnick == nick)
 895                         return true;
 896         }
 897         else
 898         {
 899                 /*
 900                  * Don't check Q:Lines if it's a server-enforced change, just on the off-chance some fucking *moron*
 901                  * tries to Q:Line SIDs, also, this means we just get our way period, as it really should be.
 902                  * Thanks Kein for finding this. -- w00t
 903                  *
 904                  * Also don't check Q:Lines for remote nickchanges, they should have our Q:Lines anyway to enforce themselves.
 905                  *              -- w00t
 906                  */
 907                 if (!IS_LOCAL(this))
 908                 {
 909                         XLine* mq = ServerInstance->XLines->MatchesLine("Q",newnick);
 910                         if (mq)
 911                         {
 912                                 if (this->registered == REG_ALL)
 913                                 {
 914                                         ServerInstance->SNO->WriteGlobalSno('a', "Q-Lined nickname %s from %s!%s@%s: %s",
 915                                                 newnick.c_str(), this->nick.c_str(), this->ident.c_str(), this->host.c_str(), mq->reason.c_str());
 916                                 }
 917                                 this->WriteNumeric(432, "%s %s :Invalid nickname: %s",this->nick.c_str(), newnick.c_str(), mq->reason.c_str());
 918                                 return false;
 919                         }
 920
 921                         if (ServerInstance->Config->RestrictBannedUsers)
 922                         {
 923                                 for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
 924                                 {
 925                                         Channel *chan = *i;
 926                                         if (chan->GetPrefixValue(this) < VOICE_VALUE && chan->IsBanned(this))
 927                                         {
 928                                                 this->WriteNumeric(404, "%s %s :Cannot send to channel (you're banned)", this->nick.c_str(), chan->name.c_str());
 929                                                 return false;
 930                                         }
 931                                 }
 932                         }
 933                 }
 934
 935                 /*
 936                  * Uh oh.. if the nickname is in use, and it's not in use by the person using it (doh) --
 937                  * then we have a potential collide. Check whether someone else is camping on the nick
 938                  * (i.e. connect -> send NICK, don't send USER.) If they are camping, force-change the
 939                  * camper to their UID, and allow the incoming nick change.
 940                  *
 941                  * If the guy using the nick is already using it, tell the incoming nick change to gtfo,
 942                  * because the nick is already (rightfully) in use. -- w00t
 943                  */
 944                 User* InUse = ServerInstance->FindNickOnly(newnick);
 945                 if (InUse && (InUse != this))
 946                 {
 947                         if (InUse->registered != REG_ALL)
 948                         {
 949                                 /* force the camper to their UUID, and ask them to re-send a NICK. */
 950                                 InUse->WriteTo(InUse, "NICK %s", InUse->uuid.c_str());
 951                                 InUse->WriteNumeric(433, "%s %s :Nickname overruled.", InUse->nick.c_str(), InUse->nick.c_str());
 952
 953                                 ServerInstance->Users->clientlist->erase(InUse->nick);
 954                                 (*(ServerInstance->Users->clientlist))[InUse->uuid] = InUse;
 955
 956                                 InUse->nick = InUse->uuid;
 957                                 InUse->InvalidateCache();
 958                                 InUse->registered &= ~REG_NICK;
 959                         }
 960                         else
 961                         {
 962                                 /* No camping, tell the incoming user  to stop trying to change nick ;p */
 963                                 this->WriteNumeric(433, "%s %s :Nickname is already in use.", this->registered >= REG_NICK ? this->nick.c_str() : "*", newnick.c_str());
 964                                 return false;
 965                         }
 966                 }
 967         }
 968
 969         if (this->registered == REG_ALL)
 970                 this->WriteCommon("NICK %s",newnick.c_str());
 971         std::string oldnick = nick;
 972         nick = newnick;
 973
 974         InvalidateCache();
 975         ServerInstance->Users->clientlist->erase(oldnick);
 976         (*(ServerInstance->Users->clientlist))[newnick] = this;
 977
 978         FOREACH_MOD(I_OnUserPostNick,OnUserPostNick(this,oldnick));
 979         return true;
 980 }
 981
 982 int LocalUser::GetServerPort()
 983 {
 984         switch (this->server_sa.sa.sa_family)
 985         {
 986                 case AF_INET6:
 987                         return htons(this->server_sa.in6.sin6_port);
 988                 case AF_INET:
 989                         return htons(this->server_sa.in4.sin_port);
 990         }
 991         return 0;
 992 }
 993
 994 const char* User::GetIPString()
 995 {
 996         int port;
 997         if (cachedip.empty())
 998         {
 999                 irc::sockets::satoap(client_sa, cachedip, port);
1000                 /* IP addresses starting with a : on irc are a Bad Thing (tm) */
1001                 if (cachedip.c_str()[0] == ':')
1002                         cachedip.insert(0,1,'0');
1003         }
1004
1005         return cachedip.c_str();
1006 }
1007
1008 irc::sockets::cidr_mask User::GetCIDRMask()
1009 {
1010         int range = 0;
1011         switch (client_sa.sa.sa_family)
1012         {
1013                 case AF_INET6:
1014                         range = ServerInstance->Config->c_ipv6_range;
1015                         break;
1016                 case AF_INET:
1017                         range = ServerInstance->Config->c_ipv4_range;
1018                         break;
1019         }
1020         return irc::sockets::cidr_mask(client_sa, range);
1021 }
1022
1023 bool User::SetClientIP(const char* sip)
1024 {
1025         this->cachedip = "";
1026         return irc::sockets::aptosa(sip, 0, client_sa);
1027 }
1028
1029 static std::string wide_newline("\r\n");
1030
1031 void User::Write(const std::string& text)
1032 {
1033 }
1034
1035 void User::Write(const char *text, ...)
1036 {
1037 }
1038
1039 void LocalUser::Write(const std::string& text)
1040 {
1041         if (!ServerInstance->SE->BoundsCheckFd(&eh))
1042                 return;
1043
1044         if (text.length() > MAXBUF - 2)
1045         {
1046                 // this should happen rarely or never. Crop the string at 512 and try again.
1047                 std::string try_again = text.substr(0, MAXBUF - 2);
1048                 Write(try_again);
1049                 return;
1050         }
1051
1052         ServerInstance->Logs->Log("USEROUTPUT", DEBUG,"C[%s] O %s", uuid.c_str(), text.c_str());
1053
1054         eh.AddWriteBuf(text);
1055         eh.AddWriteBuf(wide_newline);
1056
1057         ServerInstance->stats->statsSent += text.length() + 2;
1058         this->bytes_out += text.length() + 2;
1059         this->cmds_out++;
1060 }
1061
1062 /** Write()
1063  */
1064 void LocalUser::Write(const char *text, ...)
1065 {
1066         va_list argsPtr;
1067         char textbuffer[MAXBUF];
1068
1069         va_start(argsPtr, text);
1070         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1071         va_end(argsPtr);
1072
1073         this->Write(std::string(textbuffer));
1074 }
1075
1076 void User::WriteServ(const std::string& text)
1077 {
1078         this->Write(":%s %s",ServerInstance->Config->ServerName.c_str(),text.c_str());
1079 }
1080
1081 /** WriteServ()
1082  *  Same as Write(), except `text' is prefixed with `:server.name '.
1083  */
1084 void User::WriteServ(const char* text, ...)
1085 {
1086         va_list argsPtr;
1087         char textbuffer[MAXBUF];
1088
1089         va_start(argsPtr, text);
1090         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1091         va_end(argsPtr);
1092
1093         this->WriteServ(std::string(textbuffer));
1094 }
1095
1096
1097 void User::WriteNumeric(unsigned int numeric, const char* text, ...)
1098 {
1099         va_list argsPtr;
1100         char textbuffer[MAXBUF];
1101
1102         va_start(argsPtr, text);
1103         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1104         va_end(argsPtr);
1105
1106         this->WriteNumeric(numeric, std::string(textbuffer));
1107 }
1108
1109 void User::WriteNumeric(unsigned int numeric, const std::string &text)
1110 {
1111         char textbuffer[MAXBUF];
1112         ModResult MOD_RESULT;
1113
1114         FIRST_MOD_RESULT(OnNumeric, MOD_RESULT, (this, numeric, text));
1115
1116         if (MOD_RESULT == MOD_RES_DENY)
1117                 return;
1118
1119         snprintf(textbuffer,MAXBUF,":%s %03u %s",ServerInstance->Config->ServerName.c_str(), numeric, text.c_str());
1120         this->Write(std::string(textbuffer));
1121 }
1122
1123 void User::WriteFrom(User *user, const std::string &text)
1124 {
1125         char tb[MAXBUF];
1126
1127         snprintf(tb,MAXBUF,":%s %s",user->GetFullHost().c_str(),text.c_str());
1128
1129         this->Write(std::string(tb));
1130 }
1131
1132
1133 /* write text from an originating user to originating user */
1134
1135 void User::WriteFrom(User *user, const char* text, ...)
1136 {
1137         va_list argsPtr;
1138         char textbuffer[MAXBUF];
1139
1140         va_start(argsPtr, text);
1141         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1142         va_end(argsPtr);
1143
1144         this->WriteFrom(user, std::string(textbuffer));
1145 }
1146
1147
1148 /* write text to an destination user from a source user (e.g. user privmsg) */
1149
1150 void User::WriteTo(User *dest, const char *data, ...)
1151 {
1152         char textbuffer[MAXBUF];
1153         va_list argsPtr;
1154
1155         va_start(argsPtr, data);
1156         vsnprintf(textbuffer, MAXBUF, data, argsPtr);
1157         va_end(argsPtr);
1158
1159         this->WriteTo(dest, std::string(textbuffer));
1160 }
1161
1162 void User::WriteTo(User *dest, const std::string &data)
1163 {
1164         dest->WriteFrom(this, data);
1165 }
1166
1167 void User::WriteCommon(const char* text, ...)
1168 {
1169         char textbuffer[MAXBUF];
1170         va_list argsPtr;
1171
1172         if (this->registered != REG_ALL || quitting)
1173                 return;
1174
1175         int len = snprintf(textbuffer,MAXBUF,":%s ",this->GetFullHost().c_str());
1176
1177         va_start(argsPtr, text);
1178         vsnprintf(textbuffer + len, MAXBUF - len, text, argsPtr);
1179         va_end(argsPtr);
1180
1181         this->WriteCommonRaw(std::string(textbuffer), true);
1182 }
1183
1184 void User::WriteCommonExcept(const char* text, ...)
1185 {
1186         char textbuffer[MAXBUF];
1187         va_list argsPtr;
1188
1189         if (this->registered != REG_ALL || quitting)
1190                 return;
1191
1192         int len = snprintf(textbuffer,MAXBUF,":%s ",this->GetFullHost().c_str());
1193
1194         va_start(argsPtr, text);
1195         vsnprintf(textbuffer + len, MAXBUF - len, text, argsPtr);
1196         va_end(argsPtr);
1197
1198         this->WriteCommonRaw(std::string(textbuffer), false);
1199 }
1200
1201 void User::WriteCommonRaw(const std::string &line, bool include_self)
1202 {
1203         if (this->registered != REG_ALL || quitting)
1204                 return;
1205
1206         uniq_id_t uniq_id = ++already_sent;
1207
1208         UserChanList include_c(chans);
1209         std::map<User*,bool> exceptions;
1210
1211         exceptions[this] = include_self;
1212
1213         FOREACH_MOD(I_OnBuildNeighborList,OnBuildNeighborList(this, include_c, exceptions));
1214
1215         for (std::map<User*,bool>::iterator i = exceptions.begin(); i != exceptions.end(); ++i)
1216         {
1217                 LocalUser* u = IS_LOCAL(i->first);
1218                 if (u && !u->quitting)
1219                 {
1220                         already_sent[u->GetFd()] = uniq_id;
1221                         if (i->second)
1222                                 u->Write(line);
1223                 }
1224         }
1225         for (UCListIter v = include_c.begin(); v != include_c.end(); ++v)
1226         {
1227                 Channel* c = *v;
1228                 const UserMembList* ulist = c->GetUsers();
1229                 for (UserMembList::const_iterator i = ulist->begin(); i != ulist->end(); i++)
1230                 {
1231                         LocalUser* u = IS_LOCAL(i->first);
1232                         if (u && !u->quitting && already_sent[u->GetFd()] != uniq_id)
1233                         {
1234                                 already_sent[u->GetFd()] = uniq_id;
1235                                 u->Write(line);
1236                         }
1237                 }
1238         }
1239 }
1240
1241 void User::WriteCommonQuit(const std::string &normal_text, const std::string &oper_text)
1242 {
1243         char tb1[MAXBUF];
1244         char tb2[MAXBUF];
1245
1246         if (this->registered != REG_ALL)
1247                 return;
1248
1249         uniq_id_t uniq_id = ++already_sent;
1250
1251         snprintf(tb1,MAXBUF,":%s QUIT :%s",this->GetFullHost().c_str(),normal_text.c_str());
1252         snprintf(tb2,MAXBUF,":%s QUIT :%s",this->GetFullHost().c_str(),oper_text.c_str());
1253         std::string out1 = tb1;
1254         std::string out2 = tb2;
1255
1256         UserChanList include_c(chans);
1257         std::map<User*,bool> exceptions;
1258
1259         FOREACH_MOD(I_OnBuildNeighborList,OnBuildNeighborList(this, include_c, exceptions));
1260
1261         for (std::map<User*,bool>::iterator i = exceptions.begin(); i != exceptions.end(); ++i)
1262         {
1263                 LocalUser* u = IS_LOCAL(i->first);
1264                 if (u && !u->quitting)
1265                 {
1266                         already_sent[u->GetFd()] = uniq_id;
1267                         if (i->second)
1268                                 u->Write(IS_OPER(u) ? out2 : out1);
1269                 }
1270         }
1271         for (UCListIter v = include_c.begin(); v != include_c.end(); ++v)
1272         {
1273                 const UserMembList* ulist = (*v)->GetUsers();
1274                 for (UserMembList::const_iterator i = ulist->begin(); i != ulist->end(); i++)
1275                 {
1276                         LocalUser* u = IS_LOCAL(i->first);
1277                         if (u && !u->quitting && (already_sent[u->GetFd()] != uniq_id))
1278                         {
1279                                 already_sent[u->GetFd()] = uniq_id;
1280                                 u->Write(IS_OPER(u) ? out2 : out1);
1281                         }
1282                 }
1283         }
1284 }
1285
1286 void LocalUser::SendText(const std::string& line)
1287 {
1288         Write(line);
1289 }
1290
1291 void RemoteUser::SendText(const std::string& line)
1292 {
1293         ServerInstance->PI->PushToClient(this, line);
1294 }
1295
1296 void FakeUser::SendText(const std::string& line)
1297 {
1298 }
1299
1300 void User::SendText(const char *text, ...)
1301 {
1302         va_list argsPtr;
1303         char line[MAXBUF];
1304
1305         va_start(argsPtr, text);
1306         vsnprintf(line, MAXBUF, text, argsPtr);
1307         va_end(argsPtr);
1308
1309         SendText(std::string(line));
1310 }
1311
1312 void User::SendText(const std::string &LinePrefix, std::stringstream &TextStream)
1313 {
1314         char line[MAXBUF];
1315         int start_pos = LinePrefix.length();
1316         int pos = start_pos;
1317         memcpy(line, LinePrefix.data(), pos);
1318         std::string Word;
1319         while (TextStream >> Word)
1320         {
1321                 int len = Word.length();
1322                 if (pos + len + 12 > MAXBUF)
1323                 {
1324                         line[pos] = '\0';
1325                         SendText(std::string(line));
1326                         pos = start_pos;
1327                 }
1328                 line[pos] = ' ';
1329                 memcpy(line + pos + 1, Word.data(), len);
1330                 pos += len + 1;
1331         }
1332         line[pos] = '\0';
1333         SendText(std::string(line));
1334 }
1335
1336 /* return 0 or 1 depending if users u and u2 share one or more common channels
1337  * (used by QUIT, NICK etc which arent channel specific notices)
1338  *
1339  * The old algorithm in 1.0 for this was relatively inefficient, iterating over
1340  * the first users channels then the second users channels within the outer loop,
1341  * therefore it was a maximum of x*y iterations (upon returning 0 and checking
1342  * all possible iterations). However this new function instead checks against the
1343  * channel's userlist in the inner loop which is a std::map<User*,User*>
1344  * and saves us time as we already know what pointer value we are after.
1345  * Don't quote me on the maths as i am not a mathematician or computer scientist,
1346  * but i believe this algorithm is now x+(log y) maximum iterations instead.
1347  */
1348 bool User::SharesChannelWith(User *other)
1349 {
1350         if ((!other) || (this->registered != REG_ALL) || (other->registered != REG_ALL))
1351                 return false;
1352
1353         /* Outer loop */
1354         for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1355         {
1356                 /* Eliminate the inner loop (which used to be ~equal in size to the outer loop)
1357                  * by replacing it with a map::find which *should* be more efficient
1358                  */
1359                 if ((*i)->HasUser(other))
1360                         return true;
1361         }
1362         return false;
1363 }
1364
1365 bool User::ChangeName(const char* gecos)
1366 {
1367         if (!this->fullname.compare(gecos))
1368                 return true;
1369
1370         if (IS_LOCAL(this))
1371         {
1372                 ModResult MOD_RESULT;
1373                 FIRST_MOD_RESULT(OnChangeLocalUserGECOS, MOD_RESULT, (IS_LOCAL(this),gecos));
1374                 if (MOD_RESULT == MOD_RES_DENY)
1375                         return false;
1376                 FOREACH_MOD(I_OnChangeName,OnChangeName(this,gecos));
1377         }
1378         this->fullname.assign(gecos, 0, ServerInstance->Config->Limits.MaxGecos);
1379
1380         return true;
1381 }
1382
1383 void User::DoHostCycle(const std::string &quitline)
1384 {
1385         char buffer[MAXBUF];
1386
1387         if (!ServerInstance->Config->CycleHosts)
1388                 return;
1389
1390         uniq_id_t silent_id = ++already_sent;
1391         uniq_id_t seen_id = ++already_sent;
1392
1393         UserChanList include_c(chans);
1394         std::map<User*,bool> exceptions;
1395
1396         FOREACH_MOD(I_OnBuildNeighborList,OnBuildNeighborList(this, include_c, exceptions));
1397
1398         for (std::map<User*,bool>::iterator i = exceptions.begin(); i != exceptions.end(); ++i)
1399         {
1400                 LocalUser* u = IS_LOCAL(i->first);
1401                 if (u && !u->quitting)
1402                 {
1403                         if (i->second)
1404                         {
1405                                 already_sent[u->GetFd()] = seen_id;
1406                                 u->Write(quitline);
1407                         }
1408                         else
1409                         {
1410                                 already_sent[u->GetFd()] = silent_id;
1411                         }
1412                 }
1413         }
1414         for (UCListIter v = include_c.begin(); v != include_c.end(); ++v)
1415         {
1416                 Channel* c = *v;
1417                 snprintf(buffer, MAXBUF, ":%s JOIN %s", GetFullHost().c_str(), c->name.c_str());
1418                 std::string joinline(buffer);
1419                 Membership* memb = c->GetUser(this);
1420                 std::string modeline = memb->modes;
1421                 if (modeline.length() > 0)
1422                 {
1423                         for(unsigned int i=0; i < memb->modes.length(); i++)
1424                                 modeline.append(" ").append(nick);
1425                         snprintf(buffer, MAXBUF, ":%s MODE %s +%s", GetFullHost().c_str(), c->name.c_str(), modeline.c_str());
1426                         modeline = buffer;
1427                 }
1428
1429                 const UserMembList *ulist = c->GetUsers();
1430                 for (UserMembList::const_iterator i = ulist->begin(); i != ulist->end(); i++)
1431                 {
1432                         LocalUser* u = IS_LOCAL(i->first);
1433                         if (u == NULL || u == this)
1434                                 continue;
1435                         if (already_sent[u->GetFd()] == silent_id)
1436                                 continue;
1437
1438                         if (already_sent[u->GetFd()] != seen_id)
1439                         {
1440                                 u->Write(quitline);
1441                                 already_sent[u->GetFd()] = seen_id;
1442                         }
1443                         u->Write(joinline);
1444                         if (modeline.length() > 0)
1445                                 u->Write(modeline);
1446                 }
1447         }
1448 }
1449
1450 bool User::ChangeDisplayedHost(const char* shost)
1451 {
1452         if (dhost == shost)
1453                 return true;
1454
1455         if (IS_LOCAL(this))
1456         {
1457                 ModResult MOD_RESULT;
1458                 FIRST_MOD_RESULT(OnChangeLocalUserHost, MOD_RESULT, (IS_LOCAL(this),shost));
1459                 if (MOD_RESULT == MOD_RES_DENY)
1460                         return false;
1461         }
1462
1463         FOREACH_MOD(I_OnChangeHost, OnChangeHost(this,shost));
1464
1465         std::string quitstr = ":" + GetFullHost() + " QUIT :Changing host";
1466
1467         /* Fix by Om: User::dhost is 65 long, this was truncating some long hosts */
1468         this->dhost.assign(shost, 0, 64);
1469
1470         this->InvalidateCache();
1471
1472         this->DoHostCycle(quitstr);
1473
1474         if (IS_LOCAL(this))
1475                 this->WriteNumeric(RPL_YOURDISPLAYEDHOST, "%s %s :is now your displayed host",this->nick.c_str(),this->dhost.c_str());
1476
1477         return true;
1478 }
1479
1480 bool User::ChangeIdent(const char* newident)
1481 {
1482         if (this->ident == newident)
1483                 return true;
1484
1485         FOREACH_MOD(I_OnChangeIdent, OnChangeIdent(this,newident));
1486
1487         std::string quitstr = ":" + GetFullHost() + " QUIT :Changing ident";
1488
1489         this->ident.assign(newident, 0, ServerInstance->Config->Limits.IdentMax + 1);
1490
1491         this->InvalidateCache();
1492
1493         this->DoHostCycle(quitstr);
1494
1495         return true;
1496 }
1497
1498 void User::SendAll(const char* command, const char* text, ...)
1499 {
1500         char textbuffer[MAXBUF];
1501         char formatbuffer[MAXBUF];
1502         va_list argsPtr;
1503
1504         va_start(argsPtr, text);
1505         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1506         va_end(argsPtr);
1507
1508         snprintf(formatbuffer,MAXBUF,":%s %s $* :%s", this->GetFullHost().c_str(), command, textbuffer);
1509         std::string fmt = formatbuffer;
1510
1511         for (std::vector<LocalUser*>::const_iterator i = ServerInstance->Users->local_users.begin(); i != ServerInstance->Users->local_users.end(); i++)
1512         {
1513                 (*i)->Write(fmt);
1514         }
1515 }
1516
1517
1518 std::string User::ChannelList(User* source, bool spy)
1519 {
1520         std::string list;
1521
1522         for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1523         {
1524                 Channel* c = *i;
1525                 /* If the target is the sender, neither +p nor +s is set, or
1526                  * the channel contains the user, it is not a spy channel
1527                  */
1528                 if (spy != (source == this || !(c->IsModeSet('p') || c->IsModeSet('s')) || c->HasUser(source)))
1529                         list.append(c->GetPrefixChar(this)).append(c->name).append(" ");
1530         }
1531
1532         return list;
1533 }
1534
1535 void User::SplitChanList(User* dest, const std::string &cl)
1536 {
1537         std::string line;
1538         std::ostringstream prefix;
1539         std::string::size_type start, pos, length;
1540
1541         prefix << this->nick << " " << dest->nick << " :";
1542         line = prefix.str();
1543         int namelen = ServerInstance->Config->ServerName.length() + 6;
1544
1545         for (start = 0; (pos = cl.find(' ', start)) != std::string::npos; start = pos+1)
1546         {
1547                 length = (pos == std::string::npos) ? cl.length() : pos;
1548
1549                 if (line.length() + namelen + length - start > 510)
1550                 {
1551                         ServerInstance->SendWhoisLine(this, dest, 319, "%s", line.c_str());
1552                         line = prefix.str();
1553                 }
1554
1555                 if(pos == std::string::npos)
1556                 {
1557                         line.append(cl.substr(start, length - start));
1558                         break;
1559                 }
1560                 else
1561                 {
1562                         line.append(cl.substr(start, length - start + 1));
1563                 }
1564         }
1565
1566         if (line.length())
1567         {
1568                 ServerInstance->SendWhoisLine(this, dest, 319, "%s", line.c_str());
1569         }
1570 }
1571
1572 /*
1573  * Sets a user's connection class.
1574  * If the class name is provided, it will be used. Otherwise, the class will be guessed using host/ip/ident/etc.
1575  * NOTE: If the <ALLOW> or <DENY> tag specifies an ip, and this user resolves,
1576  * then their ip will be taken as 'priority' anyway, so for example,
1577  * <connect allow="127.0.0.1"> will match joe!bloggs@localhost
1578  */
1579 void LocalUser::SetClass(const std::string &explicit_name)
1580 {
1581         ConnectClass *found = NULL;
1582
1583         ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Setting connect class for UID %s", this->uuid.c_str());
1584
1585         if (!explicit_name.empty())
1586         {
1587                 for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++)
1588                 {
1589                         ConnectClass* c = *i;
1590
1591                         if (explicit_name == c->name)
1592                         {
1593                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Explicitly set to %s", explicit_name.c_str());
1594                                 found = c;
1595                         }
1596                 }
1597         }
1598         else
1599         {
1600                 for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++)
1601                 {
1602                         ConnectClass* c = *i;
1603
1604                         if (c->type == CC_ALLOW)
1605                         {
1606                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "ALLOW %s %d %s", c->host.c_str(), c->GetPort(), c->GetName().c_str());
1607                         }
1608                         else if (c->type == CC_DENY)
1609                         {
1610                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "DENY %s %d %s", c->GetHost().c_str(), c->GetPort(), c->GetName().c_str());
1611                         }
1612                         else
1613                         {
1614                                 continue;
1615                         }
1616
1617                         /* check if host matches.. */
1618                         if (c->GetHost().length() && !InspIRCd::MatchCIDR(this->GetIPString(), c->GetHost(), NULL) &&
1619                             !InspIRCd::MatchCIDR(this->host, c->GetHost(), NULL))
1620                         {
1621                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "No host match (for %s)", c->GetHost().c_str());
1622                                 continue;
1623                         }
1624
1625                         /*
1626                          * deny change if change will take class over the limit check it HERE, not after we found a matching class,
1627                          * because we should attempt to find another class if this one doesn't match us. -- w00t
1628                          */
1629                         if (c->limit && (c->GetReferenceCount() >= c->limit))
1630                         {
1631                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "OOPS: Connect class limit (%lu) hit, denying", c->limit);
1632                                 continue;
1633                         }
1634
1635                         /* if it requires a port ... */
1636                         if (c->GetPort())
1637                         {
1638                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Requires port (%d)", c->GetPort());
1639
1640                                 /* and our port doesn't match, fail. */
1641                                 if (this->GetServerPort() != c->GetPort())
1642                                 {
1643                                         ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Port match failed (%d)", this->GetServerPort());
1644                                         continue;
1645                                 }
1646                         }
1647
1648                         /* we stop at the first class that meets ALL critera. */
1649                         found = c;
1650                         break;
1651                 }
1652         }
1653
1654         /*
1655          * Okay, assuming we found a class that matches.. switch us into that class, keeping refcounts up to date.
1656          */
1657         if (found)
1658         {
1659                 MyClass = found;
1660         }
1661 }
1662
1663 /* looks up a users password for their connection class (<ALLOW>/<DENY> tags)
1664  * NOTE: If the <ALLOW> or <DENY> tag specifies an ip, and this user resolves,
1665  * then their ip will be taken as 'priority' anyway, so for example,
1666  * <connect allow="127.0.0.1"> will match joe!bloggs@localhost
1667  */
1668 ConnectClass* LocalUser::GetClass()
1669 {
1670         return MyClass;
1671 }
1672
1673 ConnectClass* User::GetClass()
1674 {
1675         return NULL;
1676 }
1677
1678 void User::PurgeEmptyChannels()
1679 {
1680         // firstly decrement the count on each channel
1681         for (UCListIter f = this->chans.begin(); f != this->chans.end(); f++)
1682         {
1683                 Channel* c = *f;
1684                 c->DelUser(this);
1685         }
1686
1687         this->UnOper();
1688 }
1689
1690 const std::string& FakeUser::GetFullHost()
1691 {
1692         if (!ServerInstance->Config->HideWhoisServer.empty())
1693                 return ServerInstance->Config->HideWhoisServer;
1694         return server;
1695 }
1696
1697 const std::string& FakeUser::GetFullRealHost()
1698 {
1699         if (!ServerInstance->Config->HideWhoisServer.empty())
1700                 return ServerInstance->Config->HideWhoisServer;
1701         return server;
1702 }
1703
1704 ConnectClass::ConnectClass(ConfigTag* tag, char t, const std::string& mask)
1705         : config(tag), type(t), fakelag(true), name("unnamed"), registration_timeout(0), host(mask),
1706         pingtime(0), pass(""), hash(""), softsendqmax(0), hardsendqmax(0), recvqmax(0),
1707         penaltythreshold(0), commandrate(0), maxlocal(0), maxglobal(0), maxchans(0), port(0), limit(0)
1708 {
1709 }
1710
1711 ConnectClass::ConnectClass(ConfigTag* tag, char t, const std::string& mask, const ConnectClass& parent)
1712         : config(tag), type(t), fakelag(parent.fakelag), name("unnamed"),
1713         registration_timeout(parent.registration_timeout), host(mask), pingtime(parent.pingtime),
1714         pass(parent.pass), hash(parent.hash), softsendqmax(parent.softsendqmax),
1715         hardsendqmax(parent.hardsendqmax), recvqmax(parent.recvqmax),
1716         penaltythreshold(parent.penaltythreshold), commandrate(parent.commandrate),
1717         maxlocal(parent.maxlocal), maxglobal(parent.maxglobal), maxchans(parent.maxchans),
1718         port(parent.port), limit(parent.limit)
1719 {
1720 }
1721
1722 void ConnectClass::Update(const ConnectClass* src)
1723 {
1724         name = src->name;
1725         registration_timeout = src->registration_timeout;
1726         host = src->host;
1727         pingtime = src->pingtime;
1728         pass = src->pass;
1729         hash = src->hash;
1730         softsendqmax = src->softsendqmax;
1731         hardsendqmax = src->hardsendqmax;
1732         recvqmax = src->recvqmax;
1733         penaltythreshold = src->penaltythreshold;
1734         maxlocal = src->maxlocal;
1735         maxglobal = src->maxglobal;
1736         limit = src->limit;
1737 }