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 /* $Core */
  15
  16 #include "inspircd.h"
  17 #include <stdarg.h>
  18 #include "socketengine.h"
  19 #include "xline.h"
  20 #include "bancache.h"
  21 #include "commands/cmd_whowas.h"
  22
  23 /* XXX: Used for speeding up WriteCommon operations */
  24 unsigned long uniq_id = 1;
  25
  26 static unsigned long* already_sent = NULL;
  27
  28 LocalIntExt User::NICKForced("NICKForced", NULL);
  29 LocalStringExt User::OperQuit("OperQuit", NULL);
  30
  31 void InitializeAlreadySent(SocketEngine* SE)
  32 {
  33         already_sent = new unsigned long[SE->GetMaxFds()];
  34         memset(already_sent, 0, SE->GetMaxFds() * sizeof(unsigned long));
  35 }
  36
  37 std::string User::ProcessNoticeMasks(const char *sm)
  38 {
  39         bool adding = true, oldadding = false;
  40         const char *c = sm;
  41         std::string output;
  42
  43         while (c && *c)
  44         {
  45                 switch (*c)
  46                 {
  47                         case '+':
  48                                 adding = true;
  49                         break;
  50                         case '-':
  51                                 adding = false;
  52                         break;
  53                         case '*':
  54                                 for (unsigned char d = 'A'; d <= 'z'; d++)
  55                                 {
  56                                         if (ServerInstance->SNO->IsEnabled(d))
  57                                         {
  58                                                 if ((!IsNoticeMaskSet(d) && adding) || (IsNoticeMaskSet(d) && !adding))
  59                                                 {
  60                                                         if ((oldadding != adding) || (!output.length()))
  61                                                                 output += (adding ? '+' : '-');
  62
  63                                                         this->SetNoticeMask(d, adding);
  64
  65                                                         output += d;
  66                                                 }
  67                                         }
  68                                         oldadding = adding;
  69                                 }
  70                         break;
  71                         default:
  72                                 if ((*c >= 'A') && (*c <= 'z') && (ServerInstance->SNO->IsEnabled(*c)))
  73                                 {
  74                                         if ((!IsNoticeMaskSet(*c) && adding) || (IsNoticeMaskSet(*c) && !adding))
  75                                         {
  76                                                 if ((oldadding != adding) || (!output.length()))
  77                                                         output += (adding ? '+' : '-');
  78
  79                                                 this->SetNoticeMask(*c, adding);
  80
  81                                                 output += *c;
  82                                         }
  83                                 }
  84                                 else
  85                                         this->WriteNumeric(ERR_UNKNOWNSNOMASK, "%s %c :is unknown snomask char to me", this->nick.c_str(), *c);
  86
  87                                 oldadding = adding;
  88                         break;
  89                 }
  90
  91                 *c++;
  92         }
  93
  94         std::string s = this->FormatNoticeMasks();
  95         if (s.length() == 0)
  96         {
  97                 this->modes[UM_SNOMASK] = false;
  98         }
  99
 100         return output;
 101 }
 102
 103 void User::StartDNSLookup()
 104 {
 105         try
 106         {
 107                 bool cached = false;
 108                 const char* sip = this->GetIPString();
 109                 UserResolver *res_reverse;
 110
 111                 QueryType resolvtype = this->client_sa.sa.sa_family == AF_INET6 ? DNS_QUERY_PTR6 : DNS_QUERY_PTR4;
 112                 res_reverse = new UserResolver(this, sip, resolvtype, cached);
 113
 114                 ServerInstance->AddResolver(res_reverse, cached);
 115         }
 116         catch (CoreException& e)
 117         {
 118                 ServerInstance->Logs->Log("USERS", DEBUG,"Error in resolver: %s",e.GetReason());
 119         }
 120 }
 121
 122 bool User::IsNoticeMaskSet(unsigned char sm)
 123 {
 124         if (!isalpha(sm))
 125                 return false;
 126         return (snomasks[sm-65]);
 127 }
 128
 129 void User::SetNoticeMask(unsigned char sm, bool value)
 130 {
 131         if (!isalpha(sm))
 132                 return;
 133         snomasks[sm-65] = value;
 134 }
 135
 136 const char* User::FormatNoticeMasks()
 137 {
 138         static char data[MAXBUF];
 139         int offset = 0;
 140
 141         for (int n = 0; n < 64; n++)
 142         {
 143                 if (snomasks[n])
 144                         data[offset++] = n+65;
 145         }
 146
 147         data[offset] = 0;
 148         return data;
 149 }
 150
 151 bool User::IsModeSet(unsigned char m)
 152 {
 153         if (!isalpha(m))
 154                 return false;
 155         return (modes[m-65]);
 156 }
 157
 158 void User::SetMode(unsigned char m, bool value)
 159 {
 160         if (!isalpha(m))
 161                 return;
 162         modes[m-65] = value;
 163 }
 164
 165 const char* User::FormatModes(bool showparameters)
 166 {
 167         static char data[MAXBUF];
 168         std::string params;
 169         int offset = 0;
 170
 171         for (unsigned char n = 0; n < 64; n++)
 172         {
 173                 if (modes[n])
 174                 {
 175                         data[offset++] = n + 65;
 176                         ModeHandler* mh = ServerInstance->Modes->FindMode(n + 65, MODETYPE_USER);
 177                         if (showparameters && mh && mh->GetNumParams(true))
 178                         {
 179                                 std::string p = mh->GetUserParameter(this);
 180                                 if (p.length())
 181                                         params.append(" ").append(p);
 182                         }
 183                 }
 184         }
 185         data[offset] = 0;
 186         strlcat(data, params.c_str(), MAXBUF);
 187         return data;
 188 }
 189
 190 void User::DecrementModes()
 191 {
 192         ServerInstance->Logs->Log("USERS", DEBUG, "DecrementModes()");
 193         for (unsigned char n = 'A'; n <= 'z'; n++)
 194         {
 195                 if (modes[n-65])
 196                 {
 197                         ServerInstance->Logs->Log("USERS", DEBUG,"DecrementModes() found mode %c", n);
 198                         ModeHandler* mh = ServerInstance->Modes->FindMode(n, MODETYPE_USER);
 199                         if (mh)
 200                         {
 201                                 ServerInstance->Logs->Log("USERS", DEBUG,"Found handler %c and call ChangeCount", n);
 202                                 mh->ChangeCount(-1);
 203                         }
 204                 }
 205         }
 206 }
 207
 208 User::User(const std::string &uid)
 209 {
 210         server = ServerInstance->FindServerNamePtr(ServerInstance->Config->ServerName);
 211         age = ServerInstance->Time();
 212         Penalty = 0;
 213         lastping = signon = idle_lastmsg = nping = registered = 0;
 214         bytes_in = bytes_out = cmds_in = cmds_out = 0;
 215         quietquit = quitting = exempt = haspassed = dns_done = false;
 216         fd = -1;
 217         server_sa.sa.sa_family = AF_UNSPEC;
 218         client_sa.sa.sa_family = AF_UNSPEC;
 219         MyClass = NULL;
 220         AllowedPrivs = AllowedOperCommands = NULL;
 221
 222         if (uid.empty())
 223                 uuid.assign(ServerInstance->GetUID(), 0, UUID_LENGTH - 1);
 224         else
 225                 uuid.assign(uid, 0, UUID_LENGTH - 1);
 226
 227         ServerInstance->Logs->Log("USERS", DEBUG,"New UUID for user: %s (%s)", uuid.c_str(), uid.empty() ? "allocated new" : "used remote");
 228
 229         user_hash::iterator finduuid = ServerInstance->Users->uuidlist->find(uuid);
 230         if (finduuid == ServerInstance->Users->uuidlist->end())
 231                 (*ServerInstance->Users->uuidlist)[uuid] = this;
 232         else
 233                 throw CoreException("Duplicate UUID "+std::string(uuid)+" in User constructor");
 234 }
 235
 236 User::~User()
 237 {
 238         if (uuid.length())
 239                 ServerInstance->Logs->Log("USERS", ERROR, "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 User::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* User::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 User::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 User::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 mode, ModeType type)
 410 {
 411         if (!IS_LOCAL(this))
 412                 return true;
 413
 414         if (!IS_OPER(this))
 415                 return false;
 416
 417         if (mode < 'A' || mode > ('A' + 64)) return false;
 418
 419         return ((type == MODETYPE_USER ? AllowedUserModes : AllowedChanModes))[(mode - 'A')];
 420
 421 }
 422
 423 bool User::HasPermission(const std::string &command)
 424 {
 425         /*
 426          * users on remote servers can completely bypass all permissions based checks.
 427          * This prevents desyncs when one server has different type/class tags to another.
 428          * That having been said, this does open things up to the possibility of source changes
 429          * allowing remote kills, etc - but if they have access to the src, they most likely have
 430          * access to the conf - so it's an end to a means either way.
 431          */
 432         if (!IS_LOCAL(this))
 433                 return true;
 434
 435         // are they even an oper at all?
 436         if (!IS_OPER(this))
 437         {
 438                 return false;
 439         }
 440
 441         if (!AllowedOperCommands)
 442                 return false;
 443
 444         if (AllowedOperCommands->find(command) != AllowedOperCommands->end())
 445                 return true;
 446         else if (AllowedOperCommands->find("*") != AllowedOperCommands->end())
 447                 return true;
 448
 449         return false;
 450 }
 451
 452
 453 bool User::HasPrivPermission(const std::string &privstr, bool noisy)
 454 {
 455         if (!IS_LOCAL(this))
 456         {
 457                 ServerInstance->Logs->Log("PRIVS", DEBUG, "Remote (yes)");
 458                 return true;
 459         }
 460
 461         if (!IS_OPER(this))
 462         {
 463                 if (noisy)
 464                         this->WriteServ("NOTICE %s :You are not an oper", this->nick.c_str());
 465                 return false;
 466         }
 467
 468         if (!AllowedPrivs)
 469         {
 470                 if (noisy)
 471                         this->WriteServ("NOTICE %s :Privset empty(!?)", this->nick.c_str());
 472                 return false;
 473         }
 474
 475         if (AllowedPrivs->find(privstr) != AllowedPrivs->end())
 476         {
 477                 return true;
 478         }
 479         else if (AllowedPrivs->find("*") != AllowedPrivs->end())
 480         {
 481                 return true;
 482         }
 483
 484         if (noisy)
 485                 this->WriteServ("NOTICE %s :Oper type %s does not have access to priv %s", this->nick.c_str(), this->oper.c_str(), privstr.c_str());
 486         return false;
 487 }
 488
 489 void User::OnDataReady()
 490 {
 491         if (quitting)
 492                 return;
 493
 494         if (MyClass && recvq.length() > MyClass->GetRecvqMax() && !HasPrivPermission("users/flood/increased-buffers"))
 495         {
 496                 ServerInstance->Users->QuitUser(this, "RecvQ exceeded");
 497                 ServerInstance->SNO->WriteToSnoMask('a', "User %s RecvQ of %lu exceeds connect class maximum of %lu",
 498                         nick.c_str(), (unsigned long)recvq.length(), MyClass->GetRecvqMax());
 499         }
 500         unsigned long sendqmax = ULONG_MAX;
 501         if (MyClass && !HasPrivPermission("users/flood/increased-buffers"))
 502                 sendqmax = MyClass->GetSendqSoftMax();
 503
 504         while (Penalty < 10 && getSendQSize() < sendqmax)
 505         {
 506                 std::string line;
 507                 line.reserve(MAXBUF);
 508                 std::string::size_type qpos = 0;
 509                 while (qpos < recvq.length())
 510                 {
 511                         char c = recvq[qpos++];
 512                         switch (c)
 513                         {
 514                         case '\0':
 515                                 c = ' ';
 516                                 break;
 517                         case '\r':
 518                                 continue;
 519                         case '\n':
 520                                 goto eol_found;
 521                         }
 522                         if (line.length() < MAXBUF - 2)
 523                                 line.push_back(c);
 524                 }
 525                 // if we got here, the recvq ran out before we found a newline
 526                 return;
 527 eol_found:
 528                 // just found a newline. Terminate the string, and pull it out of recvq
 529                 recvq = recvq.substr(qpos);
 530
 531                 // TODO should this be moved to when it was inserted in recvq?
 532                 ServerInstance->stats->statsRecv += qpos;
 533                 this->bytes_in += qpos;
 534                 this->cmds_in++;
 535
 536                 ServerInstance->Parser->ProcessBuffer(line, this);
 537         }
 538         // Add pseudo-penalty so that we continue processing after sendq recedes
 539         if (Penalty == 0 && getSendQSize() >= sendqmax)
 540                 Penalty++;
 541 }
 542
 543 void User::AddWriteBuf(const std::string &data)
 544 {
 545         // Don't bother sending text to remote users!
 546         if (IS_REMOTE(this))
 547                 return;
 548         if (!quitting && MyClass && getSendQSize() + data.length() > MyClass->GetSendqHardMax() && !HasPrivPermission("users/flood/increased-buffers"))
 549         {
 550                 /*
 551                  * Quit the user FIRST, because otherwise we could recurse
 552                  * here and hit the same limit.
 553                  */
 554                 ServerInstance->Users->QuitUser(this, "SendQ exceeded");
 555                 ServerInstance->SNO->WriteToSnoMask('a', "User %s SendQ exceeds connect class maximum of %lu",
 556                         nick.c_str(), MyClass->GetSendqHardMax());
 557                 return;
 558         }
 559
 560         // We still want to append data to the sendq of a quitting user,
 561         // e.g. their ERROR message that says 'closing link'
 562
 563         WriteData(data);
 564 }
 565
 566 void User::OnError(BufferedSocketError)
 567 {
 568         ServerInstance->Users->QuitUser(this, getError());
 569 }
 570
 571 void User::cull()
 572 {
 573         if (!quitting)
 574                 ServerInstance->Users->QuitUser(this, "Culled without QuitUser");
 575         if (uuid.empty())
 576         {
 577                 ServerInstance->Logs->Log("USERS", DEBUG, "User culled twice? UUID empty");
 578                 return;
 579         }
 580         PurgeEmptyChannels();
 581         if (IS_LOCAL(this))
 582         {
 583                 if (fd != INT_MAX)
 584                         Close();
 585
 586                 std::vector<User*>::iterator x = find(ServerInstance->Users->local_users.begin(),ServerInstance->Users->local_users.end(),this);
 587                 if (x != ServerInstance->Users->local_users.end())
 588                         ServerInstance->Users->local_users.erase(x);
 589                 else
 590                         ServerInstance->Logs->Log("USERS", DEBUG, "Failed to remove user from vector");
 591         }
 592
 593         if (this->MyClass)
 594         {
 595                 this->MyClass->RefCount--;
 596                 ServerInstance->Logs->Log("USERS", DEBUG, "User destructor -- connect refcount now: %lu", this->MyClass->RefCount);
 597                 if (MyClass->RefCount == 0)
 598                         delete MyClass;
 599         }
 600
 601         if (this->AllowedOperCommands)
 602         {
 603                 delete AllowedOperCommands;
 604                 AllowedOperCommands = NULL;
 605         }
 606
 607         if (this->AllowedPrivs)
 608         {
 609                 delete AllowedPrivs;
 610                 AllowedPrivs = NULL;
 611         }
 612
 613         this->InvalidateCache();
 614         this->DecrementModes();
 615
 616         if (client_sa.sa.sa_family != AF_UNSPEC)
 617                 ServerInstance->Users->RemoveCloneCounts(this);
 618
 619         ServerInstance->Users->uuidlist->erase(uuid);
 620         uuid.clear();
 621 }
 622
 623 void User::Oper(const std::string &opertype, const std::string &opername)
 624 {
 625         if (this->IsModeSet('o'))
 626                 this->UnOper();
 627
 628         this->modes[UM_OPERATOR] = 1;
 629         this->WriteServ("MODE %s :+o", this->nick.c_str());
 630         FOREACH_MOD(I_OnOper, OnOper(this, opertype));
 631
 632         ServerInstance->SNO->WriteToSnoMask('o',"%s (%s@%s) is now an IRC operator of type %s (using oper '%s')", this->nick.c_str(), this->ident.c_str(), this->host.c_str(), irc::Spacify(opertype.c_str()), opername.c_str());
 633         this->WriteNumeric(381, "%s :You are now %s %s", this->nick.c_str(), strchr("aeiouAEIOU", *opertype.c_str()) ? "an" : "a", irc::Spacify(opertype.c_str()));
 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(), opertype.c_str());
 636         this->oper.assign(opertype, 0, 512);
 637         ServerInstance->Users->all_opers.push_back(this);
 638
 639         /*
 640          * This might look like it's in the wrong place.
 641          * It is *not*!
 642          *
 643          * For multi-network servers, we may not have the opertypes of the remote server, but we still want to mark the user as an oper of that type.
 644          * -- w00t
 645          */
 646         opertype_t::iterator iter_opertype = ServerInstance->Config->opertypes.find(this->oper.c_str());
 647         if (iter_opertype != ServerInstance->Config->opertypes.end())
 648         {
 649                 if (AllowedOperCommands)
 650                         AllowedOperCommands->clear();
 651                 else
 652                         AllowedOperCommands = new std::set<std::string>;
 653
 654                 if (AllowedPrivs)
 655                         AllowedPrivs->clear();
 656                 else
 657                         AllowedPrivs = new std::set<std::string>;
 658
 659                 AllowedUserModes.reset();
 660                 AllowedChanModes.reset();
 661                 this->AllowedUserModes['o' - 'A'] = true; // Call me paranoid if you want.
 662
 663                 std::string myclass, mycmd, mypriv;
 664                 irc::spacesepstream Classes(iter_opertype->second.c_str());
 665                 while (Classes.GetToken(myclass))
 666                 {
 667                         operclass_t::iterator iter_operclass = ServerInstance->Config->operclass.find(myclass.c_str());
 668                         if (iter_operclass != ServerInstance->Config->operclass.end())
 669                         {
 670                                 /* Process commands */
 671                                 irc::spacesepstream CommandList(iter_operclass->second.commandlist);
 672                                 while (CommandList.GetToken(mycmd))
 673                                 {
 674                                         this->AllowedOperCommands->insert(mycmd);
 675                                 }
 676
 677                                 irc::spacesepstream PrivList(iter_operclass->second.privs);
 678                                 while (PrivList.GetToken(mypriv))
 679                                 {
 680                                         this->AllowedPrivs->insert(mypriv);
 681                                 }
 682
 683                                 for (unsigned char* c = (unsigned char*)iter_operclass->second.umodelist.c_str(); *c; ++c)
 684                                 {
 685                                         if (*c == '*')
 686                                         {
 687                                                 this->AllowedUserModes.set();
 688                                         }
 689                                         else
 690                                         {
 691                                                 this->AllowedUserModes[*c - 'A'] = true;
 692                                         }
 693                                 }
 694
 695                                 for (unsigned char* c = (unsigned char*)iter_operclass->second.cmodelist.c_str(); *c; ++c)
 696                                 {
 697                                         if (*c == '*')
 698                                         {
 699                                                 this->AllowedChanModes.set();
 700                                         }
 701                                         else
 702                                         {
 703                                                 this->AllowedChanModes[*c - 'A'] = true;
 704                                         }
 705                                 }
 706                         }
 707                 }
 708         }
 709
 710         FOREACH_MOD(I_OnPostOper,OnPostOper(this, opertype, opername));
 711 }
 712
 713 void User::UnOper()
 714 {
 715         if (IS_OPER(this))
 716         {
 717                 /*
 718                  * unset their oper type (what IS_OPER checks).
 719                  * note, order is important - this must come before modes as -o attempts
 720                  * to call UnOper. -- w00t
 721                  */
 722                 this->oper.clear();
 723
 724
 725                 /* Remove all oper only modes from the user when the deoper - Bug #466*/
 726                 std::string moderemove("-");
 727
 728                 for (unsigned char letter = 'A'; letter <= 'z'; letter++)
 729                 {
 730                         ModeHandler* mh = ServerInstance->Modes->FindMode(letter, MODETYPE_USER);
 731                         if (mh && mh->NeedsOper())
 732                                 moderemove += letter;
 733                 }
 734
 735
 736                 std::vector<std::string> parameters;
 737                 parameters.push_back(this->nick);
 738                 parameters.push_back(moderemove);
 739
 740                 ServerInstance->Parser->CallHandler("MODE", parameters, this);
 741
 742                 /* remove the user from the oper list. Will remove multiple entries as a safeguard against bug #404 */
 743                 ServerInstance->Users->all_opers.remove(this);
 744
 745                 if (AllowedOperCommands)
 746                 {
 747                         delete AllowedOperCommands;
 748                         AllowedOperCommands = NULL;
 749                 }
 750
 751                 if (AllowedPrivs)
 752                 {
 753                         delete AllowedPrivs;
 754                         AllowedPrivs = NULL;
 755                 }
 756
 757                 AllowedUserModes.reset();
 758                 AllowedChanModes.reset();
 759                 this->modes[UM_OPERATOR] = 0;
 760         }
 761 }
 762
 763 /* adds or updates an entry in the whowas list */
 764 void User::AddToWhoWas()
 765 {
 766         Module* whowas = ServerInstance->Modules->Find("cmd_whowas.so");
 767         if (whowas)
 768         {
 769                 WhowasRequest req(NULL, whowas, WhowasRequest::WHOWAS_ADD);
 770                 req.user = this;
 771                 req.Send();
 772         }
 773 }
 774
 775 /*
 776  * Check class restrictions
 777  */
 778 void User::CheckClass()
 779 {
 780         ConnectClass* a = this->MyClass;
 781
 782         if ((!a) || (a->type == CC_DENY))
 783         {
 784                 ServerInstance->Users->QuitUser(this, "Unauthorised connection");
 785                 return;
 786         }
 787         else if ((a->GetMaxLocal()) && (ServerInstance->Users->LocalCloneCount(this) > a->GetMaxLocal()))
 788         {
 789                 ServerInstance->Users->QuitUser(this, "No more connections allowed from your host via this connect class (local)");
 790                 ServerInstance->SNO->WriteToSnoMask('a', "WARNING: maximum LOCAL connections (%ld) exceeded for IP %s", a->GetMaxLocal(), this->GetIPString());
 791                 return;
 792         }
 793         else if ((a->GetMaxGlobal()) && (ServerInstance->Users->GlobalCloneCount(this) > a->GetMaxGlobal()))
 794         {
 795                 ServerInstance->Users->QuitUser(this, "No more connections allowed from your host via this connect class (global)");
 796                 ServerInstance->SNO->WriteToSnoMask('a', "WARNING: maximum GLOBAL connections (%ld) exceeded for IP %s", a->GetMaxGlobal(), this->GetIPString());
 797                 return;
 798         }
 799
 800         this->nping = ServerInstance->Time() + a->GetPingTime() + ServerInstance->Config->dns_timeout;
 801 }
 802
 803 bool User::CheckLines(bool doZline)
 804 {
 805         const char* check[] = { "G" , "K", (doZline) ? "Z" : NULL, NULL };
 806
 807         if (!this->exempt)
 808         {
 809                 for (int n = 0; check[n]; ++n)
 810                 {
 811                         XLine *r = ServerInstance->XLines->MatchesLine(check[n], this);
 812
 813                         if (r)
 814                         {
 815                                 r->Apply(this);
 816                                 return true;
 817                         }
 818                 }
 819         }
 820
 821         return false;
 822 }
 823
 824 void User::FullConnect()
 825 {
 826         ServerInstance->stats->statsConnects++;
 827         this->idle_lastmsg = ServerInstance->Time();
 828
 829         /*
 830          * You may be thinking "wtf, we checked this in User::AddClient!" - and yes, we did, BUT.
 831          * At the time AddClient is called, we don't have a resolved host, by here we probably do - which
 832          * may put the user into a totally seperate class with different restrictions! so we *must* check again.
 833          * Don't remove this! -- w00t
 834          */
 835         this->SetClass();
 836
 837         /* Check the password, if one is required by the user's connect class.
 838          * This CANNOT be in CheckClass(), because that is called prior to PASS as well!
 839          */
 840         if (this->MyClass && !this->MyClass->GetPass().empty() && !this->haspassed)
 841         {
 842                 ServerInstance->Users->QuitUser(this, "Invalid password");
 843                 return;
 844         }
 845
 846         if (this->CheckLines())
 847                 return;
 848
 849         this->WriteServ("NOTICE Auth :Welcome to \002%s\002!",ServerInstance->Config->Network);
 850         this->WriteNumeric(RPL_WELCOME, "%s :Welcome to the %s IRC Network %s!%s@%s",this->nick.c_str(), ServerInstance->Config->Network, this->nick.c_str(), this->ident.c_str(), this->host.c_str());
 851         this->WriteNumeric(RPL_YOURHOSTIS, "%s :Your host is %s, running version InspIRCd-2.0",this->nick.c_str(),ServerInstance->Config->ServerName);
 852         this->WriteNumeric(RPL_SERVERCREATED, "%s :This server was created %s %s", this->nick.c_str(), __TIME__, __DATE__);
 853         this->WriteNumeric(RPL_SERVERVERSION, "%s %s InspIRCd-2.0 %s %s %s", this->nick.c_str(), ServerInstance->Config->ServerName, ServerInstance->Modes->UserModeList().c_str(), ServerInstance->Modes->ChannelModeList().c_str(), ServerInstance->Modes->ParaModeList().c_str());
 854
 855         ServerInstance->Config->Send005(this);
 856         this->WriteNumeric(RPL_YOURUUID, "%s %s :your unique ID", this->nick.c_str(), this->uuid.c_str());
 857
 858
 859         this->ShowMOTD();
 860
 861         /* Now registered */
 862         if (ServerInstance->Users->unregistered_count)
 863                 ServerInstance->Users->unregistered_count--;
 864
 865         /* Trigger LUSERS output, give modules a chance too */
 866         ModResult MOD_RESULT;
 867         std::string command("LUSERS");
 868         std::vector<std::string> parameters;
 869         FIRST_MOD_RESULT(OnPreCommand, MOD_RESULT, (command, parameters, this, true, "LUSERS"));
 870         if (!MOD_RESULT)
 871                 ServerInstance->CallCommandHandler(command, parameters, this);
 872
 873         /*
 874          * We don't set REG_ALL until triggering OnUserConnect, so some module events don't spew out stuff
 875          * for a user that doesn't exist yet.
 876          */
 877         FOREACH_MOD(I_OnUserConnect,OnUserConnect(this));
 878
 879         this->registered = REG_ALL;
 880
 881         FOREACH_MOD(I_OnPostConnect,OnPostConnect(this));
 882
 883         ServerInstance->SNO->WriteToSnoMask('c',"Client connecting on port %d: %s!%s@%s [%s] [%s]",
 884                 this->GetServerPort(), this->nick.c_str(), this->ident.c_str(), this->host.c_str(), this->GetIPString(), this->fullname.c_str());
 885         ServerInstance->Logs->Log("BANCACHE", DEBUG, "BanCache: Adding NEGATIVE hit for %s", this->GetIPString());
 886         ServerInstance->BanCache->AddHit(this->GetIPString(), "", "");
 887 }
 888
 889 /** User::UpdateNick()
 890  * re-allocates a nick in the user_hash after they change nicknames,
 891  * returns a pointer to the new user as it may have moved
 892  */
 893 User* User::UpdateNickHash(const char* New)
 894 {
 895         //user_hash::iterator newnick;
 896         user_hash::iterator oldnick = ServerInstance->Users->clientlist->find(this->nick);
 897
 898         if (!irc::string(this->nick.c_str()).compare(New))
 899                 return oldnick->second;
 900
 901         if (oldnick == ServerInstance->Users->clientlist->end())
 902                 return NULL; /* doesnt exist */
 903
 904         User* olduser = oldnick->second;
 905         ServerInstance->Users->clientlist->erase(oldnick);
 906         (*(ServerInstance->Users->clientlist))[New] = olduser;
 907         return olduser;
 908 }
 909
 910 void User::InvalidateCache()
 911 {
 912         /* Invalidate cache */
 913         cached_fullhost.clear();
 914         cached_hostip.clear();
 915         cached_makehost.clear();
 916         cached_fullrealhost.clear();
 917 }
 918
 919 bool User::ForceNickChange(const char* newnick)
 920 {
 921         ModResult MOD_RESULT;
 922
 923         this->InvalidateCache();
 924
 925         NICKForced.set(this, 1);
 926         FIRST_MOD_RESULT(OnUserPreNick, MOD_RESULT, (this, newnick));
 927         NICKForced.set(this, 0);
 928
 929         if (MOD_RESULT == MOD_RES_DENY)
 930         {
 931                 ServerInstance->stats->statsCollisions++;
 932                 return false;
 933         }
 934
 935         std::deque<classbase*> dummy;
 936         Command* nickhandler = ServerInstance->Parser->GetHandler("NICK");
 937         if (nickhandler) // wtfbbq, when would this not be here
 938         {
 939                 std::vector<std::string> parameters;
 940                 parameters.push_back(newnick);
 941                 NICKForced.set(this, 1);
 942                 bool result = (ServerInstance->Parser->CallHandler("NICK", parameters, this) == CMD_SUCCESS);
 943                 NICKForced.set(this, 0);
 944                 return result;
 945         }
 946
 947         // Unreachable, we hope
 948         return false;
 949 }
 950
 951 int User::GetServerPort()
 952 {
 953         switch (this->server_sa.sa.sa_family)
 954         {
 955                 case AF_INET6:
 956                         return htons(this->server_sa.in6.sin6_port);
 957                 case AF_INET:
 958                         return htons(this->server_sa.in4.sin_port);
 959         }
 960         return 0;
 961 }
 962
 963 const char* User::GetCIDRMask(int range)
 964 {
 965         static char buf[44];
 966
 967         if (range < 0)
 968                 throw "Negative range, sorry, no.";
 969
 970         /*
 971          * Original code written by Oliver Lupton (Om).
 972          * Integrated by me. Thanks. :) -- w00t
 973          */
 974         switch (this->client_sa.sa.sa_family)
 975         {
 976                 case AF_INET6:
 977                 {
 978                         /* unsigned char s6_addr[16]; */
 979                         struct in6_addr v6;
 980                         int i, bytestozero, extrabits;
 981                         char buffer[40];
 982
 983                         if(range > 128)
 984                                 throw "CIDR mask width greater than address width (IPv6, 128 bit)";
 985
 986                         /* To create the CIDR mask we want to set all the bits after 'range' bits of the address
 987                          * to zero. This means the last (128 - range) bits of the address must be set to zero.
 988                          * Hence this number divided by 8 is the number of whole bytes from the end of the address
 989                          * which must be set to zero.
 990                          */
 991                         bytestozero = (128 - range) / 8;
 992
 993                         /* Some of the least significant bits of the next most significant byte may also have to
 994                          * be zeroed. The number of bits is the remainder of the above division.
 995                          */
 996                         extrabits = (128 - range) % 8;
 997
 998                         /* Populate our working struct with the parts of the user's IP which are required in the
 999                          * final CIDR mask. Set all the subsequent bytes to zero.
1000                          * (16 - bytestozero) is the number of bytes which must be populated with actual IP data.
1001                          */
1002                         for(i = 0; i < (16 - bytestozero); i++)
1003                         {
1004                                 v6.s6_addr[i] = client_sa.in6.sin6_addr.s6_addr[i];
1005                         }
1006
1007                         /* And zero all the remaining bytes in the IP. */
1008                         for(; i < 16; i++)
1009                         {
1010                                 v6.s6_addr[i] = 0;
1011                         }
1012
1013                         /* And finally, zero the extra bits required. */
1014                         v6.s6_addr[15 - bytestozero] = (v6.s6_addr[15 - bytestozero] >> extrabits) << extrabits;
1015
1016                         snprintf(buf, 44, "%s/%d", inet_ntop(AF_INET6, &v6, buffer, 40), range);
1017                         return buf;
1018                 }
1019                 break;
1020                 case AF_INET:
1021                 {
1022                         struct in_addr v4;
1023                         char buffer[16];
1024
1025                         if (range > 32)
1026                                 throw "CIDR mask width greater than address width (IPv4, 32 bit)";
1027
1028                         /* Users already have a sockaddr* pointer (User::ip) which contains either a v4 or v6 structure */
1029                         v4.s_addr = client_sa.in4.sin_addr.s_addr;
1030
1031                         /* To create the CIDR mask we want to set all the bits after 'range' bits of the address
1032                          * to zero. This means the last (32 - range) bits of the address must be set to zero.
1033                          * This is done by shifting the value right and then back left by (32 - range) bits.
1034                          */
1035                         if(range > 0)
1036                         {
1037                                 v4.s_addr = ntohl(v4.s_addr);
1038                                 v4.s_addr = (v4.s_addr >> (32 - range)) << (32 - range);
1039                                 v4.s_addr = htonl(v4.s_addr);
1040                         }
1041                         else
1042                         {
1043                                 /* a range of zero would cause a 32 bit value to be shifted by 32 bits.
1044                                  * this has undefined behaviour, but for CIDR purposes the resulting mask
1045                                  * from a.b.c.d/0 is 0.0.0.0/0
1046                                  */
1047                                 v4.s_addr = 0;
1048                         }
1049
1050                         snprintf(buf, 44, "%s/%d", inet_ntop(AF_INET, &v4, buffer, 16), range);
1051                         return buf;
1052                 }
1053                 break;
1054         }
1055
1056         return ""; // unused, but oh well
1057 }
1058
1059 std::string User::GetServerIP()
1060 {
1061         int port;
1062         std::string ip;
1063         irc::sockets::satoap(&server_sa, ip, port);
1064         return ip;
1065 }
1066
1067 const char* User::GetIPString()
1068 {
1069         int port;
1070         if (cachedip.empty())
1071         {
1072                 irc::sockets::satoap(&client_sa, cachedip, port);
1073                 /* IP addresses starting with a : on irc are a Bad Thing (tm) */
1074                 if (cachedip.c_str()[0] == ':')
1075                         cachedip.insert(0,1,'0');
1076         }
1077
1078         return cachedip.c_str();
1079 }
1080
1081 bool User::SetClientIP(const char* sip)
1082 {
1083         this->cachedip = "";
1084         return irc::sockets::aptosa(sip, 0, &client_sa);
1085 }
1086
1087 static std::string wide_newline("\r\n");
1088
1089 void User::Write(const std::string& text)
1090 {
1091         if (!ServerInstance->SE->BoundsCheckFd(this))
1092                 return;
1093
1094         if (text.length() > MAXBUF - 2)
1095         {
1096                 // this should happen rarely or never. Crop the string at 512 and try again.
1097                 std::string try_again = text.substr(0, MAXBUF - 2);
1098                 Write(try_again);
1099                 return;
1100         }
1101
1102         ServerInstance->Logs->Log("USEROUTPUT", DEBUG,"C[%d] O %s", this->GetFd(), text.c_str());
1103
1104         this->AddWriteBuf(text);
1105         this->AddWriteBuf(wide_newline);
1106
1107         ServerInstance->stats->statsSent += text.length() + 2;
1108         this->bytes_out += text.length() + 2;
1109         this->cmds_out++;
1110 }
1111
1112 /** Write()
1113  */
1114 void User::Write(const char *text, ...)
1115 {
1116         va_list argsPtr;
1117         char textbuffer[MAXBUF];
1118
1119         va_start(argsPtr, text);
1120         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1121         va_end(argsPtr);
1122
1123         this->Write(std::string(textbuffer));
1124 }
1125
1126 void User::WriteServ(const std::string& text)
1127 {
1128         this->Write(":%s %s",ServerInstance->Config->ServerName,text.c_str());
1129 }
1130
1131 /** WriteServ()
1132  *  Same as Write(), except `text' is prefixed with `:server.name '.
1133  */
1134 void User::WriteServ(const char* text, ...)
1135 {
1136         va_list argsPtr;
1137         char textbuffer[MAXBUF];
1138
1139         va_start(argsPtr, text);
1140         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1141         va_end(argsPtr);
1142
1143         this->WriteServ(std::string(textbuffer));
1144 }
1145
1146
1147 void User::WriteNumeric(unsigned int numeric, const char* text, ...)
1148 {
1149         va_list argsPtr;
1150         char textbuffer[MAXBUF];
1151
1152         va_start(argsPtr, text);
1153         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1154         va_end(argsPtr);
1155
1156         this->WriteNumeric(numeric, std::string(textbuffer));
1157 }
1158
1159 void User::WriteNumeric(unsigned int numeric, const std::string &text)
1160 {
1161         char textbuffer[MAXBUF];
1162         ModResult MOD_RESULT;
1163
1164         FIRST_MOD_RESULT(OnNumeric, MOD_RESULT, (this, numeric, text));
1165
1166         if (MOD_RESULT == MOD_RES_DENY)
1167                 return;
1168
1169         snprintf(textbuffer,MAXBUF,":%s %03u %s",ServerInstance->Config->ServerName, numeric, text.c_str());
1170         this->Write(std::string(textbuffer));
1171 }
1172
1173 void User::WriteFrom(User *user, const std::string &text)
1174 {
1175         char tb[MAXBUF];
1176
1177         snprintf(tb,MAXBUF,":%s %s",user->GetFullHost().c_str(),text.c_str());
1178
1179         this->Write(std::string(tb));
1180 }
1181
1182
1183 /* write text from an originating user to originating user */
1184
1185 void User::WriteFrom(User *user, const char* text, ...)
1186 {
1187         va_list argsPtr;
1188         char textbuffer[MAXBUF];
1189
1190         va_start(argsPtr, text);
1191         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1192         va_end(argsPtr);
1193
1194         this->WriteFrom(user, std::string(textbuffer));
1195 }
1196
1197
1198 /* write text to an destination user from a source user (e.g. user privmsg) */
1199
1200 void User::WriteTo(User *dest, const char *data, ...)
1201 {
1202         char textbuffer[MAXBUF];
1203         va_list argsPtr;
1204
1205         va_start(argsPtr, data);
1206         vsnprintf(textbuffer, MAXBUF, data, argsPtr);
1207         va_end(argsPtr);
1208
1209         this->WriteTo(dest, std::string(textbuffer));
1210 }
1211
1212 void User::WriteTo(User *dest, const std::string &data)
1213 {
1214         dest->WriteFrom(this, data);
1215 }
1216
1217
1218 void User::WriteCommon(const char* text, ...)
1219 {
1220         char textbuffer[MAXBUF];
1221         va_list argsPtr;
1222
1223         if (this->registered != REG_ALL)
1224                 return;
1225
1226         va_start(argsPtr, text);
1227         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1228         va_end(argsPtr);
1229
1230         this->WriteCommon(std::string(textbuffer));
1231 }
1232
1233 void User::WriteCommon(const std::string &text)
1234 {
1235         bool sent_to_at_least_one = false;
1236         char tb[MAXBUF];
1237
1238         if (this->registered != REG_ALL)
1239                 return;
1240
1241         uniq_id++;
1242
1243         if (!already_sent)
1244                 InitializeAlreadySent(ServerInstance->SE);
1245
1246         /* We dont want to be doing this n times, just once */
1247         snprintf(tb,MAXBUF,":%s %s",this->GetFullHost().c_str(),text.c_str());
1248         std::string out = tb;
1249
1250         for (UCListIter v = this->chans.begin(); v != this->chans.end(); v++)
1251         {
1252                 const UserMembList* ulist = (*v)->GetUsers();
1253                 for (UserMembList::const_iterator i = ulist->begin(); i != ulist->end(); i++)
1254                 {
1255                         if ((IS_LOCAL(i->first)) && (already_sent[i->first->fd] != uniq_id))
1256                         {
1257                                 already_sent[i->first->fd] = uniq_id;
1258                                 i->first->Write(out);
1259                                 sent_to_at_least_one = true;
1260                         }
1261                 }
1262         }
1263
1264         /*
1265          * if the user was not in any channels, no users will receive the text. Make sure the user
1266          * receives their OWN message for WriteCommon
1267          */
1268         if (!sent_to_at_least_one)
1269         {
1270                 this->Write(std::string(tb));
1271         }
1272 }
1273
1274
1275 /* write a formatted string to all users who share at least one common
1276  * channel, NOT including the source user e.g. for use in QUIT
1277  */
1278
1279 void User::WriteCommonExcept(const char* text, ...)
1280 {
1281         char textbuffer[MAXBUF];
1282         va_list argsPtr;
1283
1284         va_start(argsPtr, text);
1285         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1286         va_end(argsPtr);
1287
1288         this->WriteCommonExcept(std::string(textbuffer));
1289 }
1290
1291 void User::WriteCommonQuit(const std::string &normal_text, const std::string &oper_text)
1292 {
1293         char tb1[MAXBUF];
1294         char tb2[MAXBUF];
1295
1296         if (this->registered != REG_ALL)
1297                 return;
1298
1299         uniq_id++;
1300
1301         if (!already_sent)
1302                 InitializeAlreadySent(ServerInstance->SE);
1303
1304         snprintf(tb1,MAXBUF,":%s QUIT :%s",this->GetFullHost().c_str(),normal_text.c_str());
1305         snprintf(tb2,MAXBUF,":%s QUIT :%s",this->GetFullHost().c_str(),oper_text.c_str());
1306         std::string out1 = tb1;
1307         std::string out2 = tb2;
1308
1309         for (UCListIter v = this->chans.begin(); v != this->chans.end(); v++)
1310         {
1311                 const UserMembList* ulist = (*v)->GetUsers();
1312                 for (UserMembList::const_iterator i = ulist->begin(); i != ulist->end(); i++)
1313                 {
1314                         if (this != i->first)
1315                         {
1316                                 if ((IS_LOCAL(i->first)) && (already_sent[i->first->fd] != uniq_id))
1317                                 {
1318                                         already_sent[i->first->fd] = uniq_id;
1319                                         i->first->Write(IS_OPER(i->first) ? out2 : out1);
1320                                 }
1321                         }
1322                 }
1323         }
1324 }
1325
1326 void User::WriteCommonExcept(const std::string &text)
1327 {
1328         char tb1[MAXBUF];
1329         std::string out1;
1330
1331         if (this->registered != REG_ALL)
1332                 return;
1333
1334         uniq_id++;
1335
1336         if (!already_sent)
1337                 InitializeAlreadySent(ServerInstance->SE);
1338
1339         snprintf(tb1,MAXBUF,":%s %s",this->GetFullHost().c_str(),text.c_str());
1340         out1 = tb1;
1341
1342         for (UCListIter v = this->chans.begin(); v != this->chans.end(); v++)
1343         {
1344                 const UserMembList* ulist = (*v)->GetUsers();
1345                 for (UserMembList::const_iterator i = ulist->begin(); i != ulist->end(); i++)
1346                 {
1347                         if (this != i->first)
1348                         {
1349                                 if ((IS_LOCAL(i->first)) && (already_sent[i->first->fd] != uniq_id))
1350                                 {
1351                                         already_sent[i->first->fd] = uniq_id;
1352                                         i->first->Write(out1);
1353                                 }
1354                         }
1355                 }
1356         }
1357
1358 }
1359
1360 void User::WriteWallOps(const std::string &text)
1361 {
1362         std::string wallop("WALLOPS :");
1363         wallop.append(text);
1364
1365         for (std::vector<User*>::const_iterator i = ServerInstance->Users->local_users.begin(); i != ServerInstance->Users->local_users.end(); i++)
1366         {
1367                 User* t = *i;
1368                 if (t->IsModeSet('w'))
1369                         this->WriteTo(t,wallop);
1370         }
1371 }
1372
1373 void User::WriteWallOps(const char* text, ...)
1374 {
1375         if (!IS_LOCAL(this))
1376                 return;
1377
1378         char textbuffer[MAXBUF];
1379         va_list argsPtr;
1380
1381         va_start(argsPtr, text);
1382         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1383         va_end(argsPtr);
1384
1385         this->WriteWallOps(std::string(textbuffer));
1386 }
1387
1388 /* return 0 or 1 depending if users u and u2 share one or more common channels
1389  * (used by QUIT, NICK etc which arent channel specific notices)
1390  *
1391  * The old algorithm in 1.0 for this was relatively inefficient, iterating over
1392  * the first users channels then the second users channels within the outer loop,
1393  * therefore it was a maximum of x*y iterations (upon returning 0 and checking
1394  * all possible iterations). However this new function instead checks against the
1395  * channel's userlist in the inner loop which is a std::map<User*,User*>
1396  * and saves us time as we already know what pointer value we are after.
1397  * Don't quote me on the maths as i am not a mathematician or computer scientist,
1398  * but i believe this algorithm is now x+(log y) maximum iterations instead.
1399  */
1400 bool User::SharesChannelWith(User *other)
1401 {
1402         if ((!other) || (this->registered != REG_ALL) || (other->registered != REG_ALL))
1403                 return false;
1404
1405         /* Outer loop */
1406         for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1407         {
1408                 /* Eliminate the inner loop (which used to be ~equal in size to the outer loop)
1409                  * by replacing it with a map::find which *should* be more efficient
1410                  */
1411                 if ((*i)->HasUser(other))
1412                         return true;
1413         }
1414         return false;
1415 }
1416
1417 bool User::ChangeName(const char* gecos)
1418 {
1419         if (!this->fullname.compare(gecos))
1420                 return true;
1421
1422         if (IS_LOCAL(this))
1423         {
1424                 ModResult MOD_RESULT;
1425                 FIRST_MOD_RESULT(OnChangeLocalUserGECOS, MOD_RESULT, (this,gecos));
1426                 if (MOD_RESULT == MOD_RES_DENY)
1427                         return false;
1428                 FOREACH_MOD(I_OnChangeName,OnChangeName(this,gecos));
1429         }
1430         this->fullname.assign(gecos, 0, ServerInstance->Config->Limits.MaxGecos);
1431
1432         return true;
1433 }
1434
1435 void User::DoHostCycle(const std::string &quitline)
1436 {
1437         char buffer[MAXBUF];
1438
1439         ModResult result = MOD_RES_PASSTHRU;
1440         FIRST_MOD_RESULT(OnHostCycle, result, (this));
1441
1442         if (result == MOD_RES_DENY)
1443                 return;
1444         if (result == MOD_RES_PASSTHRU && !ServerInstance->Config->CycleHosts)
1445                 return;
1446
1447         uniq_id++;
1448
1449         if (!already_sent)
1450                 InitializeAlreadySent(ServerInstance->SE);
1451
1452         for (UCListIter v = this->chans.begin(); v != this->chans.end(); v++)
1453         {
1454                 Channel* c = *v;
1455                 snprintf(buffer, MAXBUF, ":%s JOIN %s", GetFullHost().c_str(), c->name.c_str());
1456                 std::string joinline(buffer);
1457                 std::string modeline = ServerInstance->Modes->ModeString(this, c);
1458                 if (modeline.length() > 0)
1459                 {
1460                         snprintf(buffer, MAXBUF, ":%s MODE %s +%s", GetFullHost().c_str(), c->name.c_str(), modeline.c_str());
1461                         modeline = buffer;
1462                 }
1463
1464                 const UserMembList *ulist = c->GetUsers();
1465                 for (UserMembList::const_iterator i = ulist->begin(); i != ulist->end(); i++)
1466                 {
1467                         User* u = i->first;
1468                         if (u == this || !IS_LOCAL(u))
1469                                 continue;
1470
1471                         if (already_sent[i->first->fd] != uniq_id)
1472                         {
1473                                 u->Write(quitline);
1474                                 already_sent[i->first->fd] = uniq_id;
1475                         }
1476                         u->Write(joinline);
1477                         if (modeline.length() > 0)
1478                                 u->Write(modeline);
1479                 }
1480         }
1481 }
1482
1483 bool User::ChangeDisplayedHost(const char* shost)
1484 {
1485         if (dhost == shost)
1486                 return true;
1487
1488         if (IS_LOCAL(this))
1489         {
1490                 ModResult MOD_RESULT;
1491                 FIRST_MOD_RESULT(OnChangeLocalUserHost, MOD_RESULT, (this,shost));
1492                 if (MOD_RESULT == MOD_RES_DENY)
1493                         return false;
1494         }
1495
1496         FOREACH_MOD(I_OnChangeHost, OnChangeHost(this,shost));
1497
1498         std::string quitstr = ":" + GetFullHost() + " QUIT :Changing host";
1499
1500         /* Fix by Om: User::dhost is 65 long, this was truncating some long hosts */
1501         this->dhost.assign(shost, 0, 64);
1502
1503         this->InvalidateCache();
1504
1505         this->DoHostCycle(quitstr);
1506
1507         if (IS_LOCAL(this))
1508                 this->WriteNumeric(RPL_YOURDISPLAYEDHOST, "%s %s :is now your displayed host",this->nick.c_str(),this->dhost.c_str());
1509
1510         return true;
1511 }
1512
1513 bool User::ChangeIdent(const char* newident)
1514 {
1515         if (this->ident == newident)
1516                 return true;
1517
1518         FOREACH_MOD(I_OnChangeIdent, OnChangeIdent(this,newident));
1519
1520         std::string quitstr = ":" + GetFullHost() + " QUIT :Changing ident";
1521
1522         this->ident.assign(newident, 0, ServerInstance->Config->Limits.IdentMax + 1);
1523
1524         this->InvalidateCache();
1525
1526         this->DoHostCycle(quitstr);
1527
1528         return true;
1529 }
1530
1531 void User::SendAll(const char* command, const char* text, ...)
1532 {
1533         char textbuffer[MAXBUF];
1534         char formatbuffer[MAXBUF];
1535         va_list argsPtr;
1536
1537         va_start(argsPtr, text);
1538         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1539         va_end(argsPtr);
1540
1541         snprintf(formatbuffer,MAXBUF,":%s %s $* :%s", this->GetFullHost().c_str(), command, textbuffer);
1542         std::string fmt = formatbuffer;
1543
1544         for (std::vector<User*>::const_iterator i = ServerInstance->Users->local_users.begin(); i != ServerInstance->Users->local_users.end(); i++)
1545         {
1546                 (*i)->Write(fmt);
1547         }
1548 }
1549
1550
1551 std::string User::ChannelList(User* source, bool spy)
1552 {
1553         std::string list;
1554
1555         for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1556         {
1557                 Channel* c = *i;
1558                 /* If the target is the sender, neither +p nor +s is set, or
1559                  * the channel contains the user, it is not a spy channel
1560                  */
1561                 if (spy != (source == this || !(c->IsModeSet('p') || c->IsModeSet('s')) || c->HasUser(source)))
1562                         list.append(c->GetPrefixChar(this)).append(c->name).append(" ");
1563         }
1564
1565         return list;
1566 }
1567
1568 void User::SplitChanList(User* dest, const std::string &cl)
1569 {
1570         std::string line;
1571         std::ostringstream prefix;
1572         std::string::size_type start, pos, length;
1573
1574         prefix << this->nick << " " << dest->nick << " :";
1575         line = prefix.str();
1576         int namelen = strlen(ServerInstance->Config->ServerName) + 6;
1577
1578         for (start = 0; (pos = cl.find(' ', start)) != std::string::npos; start = pos+1)
1579         {
1580                 length = (pos == std::string::npos) ? cl.length() : pos;
1581
1582                 if (line.length() + namelen + length - start > 510)
1583                 {
1584                         ServerInstance->SendWhoisLine(this, dest, 319, "%s", line.c_str());
1585                         line = prefix.str();
1586                 }
1587
1588                 if(pos == std::string::npos)
1589                 {
1590                         line.append(cl.substr(start, length - start));
1591                         break;
1592                 }
1593                 else
1594                 {
1595                         line.append(cl.substr(start, length - start + 1));
1596                 }
1597         }
1598
1599         if (line.length())
1600         {
1601                 ServerInstance->SendWhoisLine(this, dest, 319, "%s", line.c_str());
1602         }
1603 }
1604
1605 /*
1606  * Sets a user's connection class.
1607  * If the class name is provided, it will be used. Otherwise, the class will be guessed using host/ip/ident/etc.
1608  * NOTE: If the <ALLOW> or <DENY> tag specifies an ip, and this user resolves,
1609  * then their ip will be taken as 'priority' anyway, so for example,
1610  * <connect allow="127.0.0.1"> will match joe!bloggs@localhost
1611  */
1612 ConnectClass* User::SetClass(const std::string &explicit_name)
1613 {
1614         ConnectClass *found = NULL;
1615
1616         if (!IS_LOCAL(this))
1617                 return NULL;
1618
1619         ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Setting connect class for UID %s", this->uuid.c_str());
1620
1621         if (!explicit_name.empty())
1622         {
1623                 for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++)
1624                 {
1625                         ConnectClass* c = *i;
1626
1627                         if (explicit_name == c->name)
1628                         {
1629                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Explicitly set to %s", explicit_name.c_str());
1630                                 found = c;
1631                         }
1632                 }
1633         }
1634         else
1635         {
1636                 for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++)
1637                 {
1638                         ConnectClass* c = *i;
1639
1640                         if (c->type == CC_ALLOW)
1641                         {
1642                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "ALLOW %s %d %s", c->host.c_str(), c->GetPort(), c->GetName().c_str());
1643                         }
1644                         else
1645                         {
1646                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "DENY %s %d %s", c->GetHost().c_str(), c->GetPort(), c->GetName().c_str());
1647                         }
1648
1649                         /* check if host matches.. */
1650                         if (c->GetHost().length() && !InspIRCd::MatchCIDR(this->GetIPString(), c->GetHost(), NULL) &&
1651                             !InspIRCd::MatchCIDR(this->host, c->GetHost(), NULL))
1652                         {
1653                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "No host match (for %s)", c->GetHost().c_str());
1654                                 continue;
1655                         }
1656
1657                         /*
1658                          * deny change if change will take class over the limit check it HERE, not after we found a matching class,
1659                          * because we should attempt to find another class if this one doesn't match us. -- w00t
1660                          */
1661                         if (c->limit && (c->RefCount >= c->limit))
1662                         {
1663                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "OOPS: Connect class limit (%lu) hit, denying", c->limit);
1664                                 continue;
1665                         }
1666
1667                         /* if it requires a port ... */
1668                         if (c->GetPort())
1669                         {
1670                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Requires port (%d)", c->GetPort());
1671
1672                                 /* and our port doesn't match, fail. */
1673                                 if (this->GetServerPort() != c->GetPort())
1674                                 {
1675                                         ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Port match failed (%d)", this->GetServerPort());
1676                                         continue;
1677                                 }
1678                         }
1679
1680                         /* we stop at the first class that meets ALL critera. */
1681                         found = c;
1682                         break;
1683                 }
1684         }
1685
1686         /*
1687          * Okay, assuming we found a class that matches.. switch us into that class, keeping refcounts up to date.
1688          */
1689         if (found)
1690         {
1691                 /* only fiddle with refcounts if they are already in a class .. */
1692                 if (this->MyClass)
1693                 {
1694                         if (found == this->MyClass) // no point changing this shit :P
1695                                 return this->MyClass;
1696                         this->MyClass->RefCount--;
1697                         ServerInstance->Logs->Log("USERS", DEBUG, "Untying user from connect class -- refcount: %lu", this->MyClass->RefCount);
1698                         if (MyClass->RefCount == 0)
1699                                 delete MyClass;
1700                 }
1701
1702                 this->MyClass = found;
1703                 this->MyClass->RefCount++;
1704                 ServerInstance->Logs->Log("USERS", DEBUG, "User tied to new class -- connect refcount now: %lu", this->MyClass->RefCount);
1705         }
1706
1707         return this->MyClass;
1708 }
1709
1710 /* looks up a users password for their connection class (<ALLOW>/<DENY> tags)
1711  * NOTE: If the <ALLOW> or <DENY> tag specifies an ip, and this user resolves,
1712  * then their ip will be taken as 'priority' anyway, so for example,
1713  * <connect allow="127.0.0.1"> will match joe!bloggs@localhost
1714  */
1715 ConnectClass* User::GetClass()
1716 {
1717         return this->MyClass;
1718 }
1719
1720 void User::PurgeEmptyChannels()
1721 {
1722         std::vector<Channel*> to_delete;
1723
1724         // firstly decrement the count on each channel
1725         for (UCListIter f = this->chans.begin(); f != this->chans.end(); f++)
1726         {
1727                 Channel* c = *f;
1728                 c->RemoveAllPrefixes(this);
1729                 if (c->DelUser(this) == 0)
1730                 {
1731                         /* No users left in here, mark it for deletion */
1732                         try
1733                         {
1734                                 to_delete.push_back(c);
1735                         }
1736                         catch (...)
1737                         {
1738                                 ServerInstance->Logs->Log("USERS", DEBUG,"Exception in User::PurgeEmptyChannels to_delete.push_back()");
1739                         }
1740                 }
1741         }
1742
1743         for (std::vector<Channel*>::iterator n = to_delete.begin(); n != to_delete.end(); n++)
1744         {
1745                 Channel* thischan = *n;
1746                 chan_hash::iterator i2 = ServerInstance->chanlist->find(thischan->name);
1747                 if (i2 != ServerInstance->chanlist->end())
1748                 {
1749                         ModResult MOD_RESULT;
1750                         FIRST_MOD_RESULT(OnChannelPreDelete, MOD_RESULT, (i2->second));
1751                         if (MOD_RESULT == MOD_RES_DENY)
1752                                 continue; // delete halted by module
1753                         FOREACH_MOD(I_OnChannelDelete,OnChannelDelete(i2->second));
1754                         delete i2->second;
1755                         ServerInstance->chanlist->erase(i2);
1756                         this->chans.erase(*n);
1757                 }
1758         }
1759
1760         this->UnOper();
1761 }
1762
1763 void User::ShowMOTD()
1764 {
1765         if (!ServerInstance->Config->MOTD.size())
1766         {
1767                 this->WriteNumeric(ERR_NOMOTD, "%s :Message of the day file is missing.",this->nick.c_str());
1768                 return;
1769         }
1770         this->WriteNumeric(RPL_MOTDSTART, "%s :%s message of the day", this->nick.c_str(), ServerInstance->Config->ServerName);
1771
1772         for (file_cache::iterator i = ServerInstance->Config->MOTD.begin(); i != ServerInstance->Config->MOTD.end(); i++)
1773                 this->WriteNumeric(RPL_MOTD, "%s :- %s",this->nick.c_str(),i->c_str());
1774
1775         this->WriteNumeric(RPL_ENDOFMOTD, "%s :End of message of the day.", this->nick.c_str());
1776 }
1777
1778 void User::ShowRULES()
1779 {
1780         if (!ServerInstance->Config->RULES.size())
1781         {
1782                 this->WriteNumeric(ERR_NORULES, "%s :RULES File is missing",this->nick.c_str());
1783                 return;
1784         }
1785
1786         this->WriteNumeric(RPL_RULESTART, "%s :- %s Server Rules -",this->nick.c_str(),ServerInstance->Config->ServerName);
1787
1788         for (file_cache::iterator i = ServerInstance->Config->RULES.begin(); i != ServerInstance->Config->RULES.end(); i++)
1789                 this->WriteNumeric(RPL_RULES, "%s :- %s",this->nick.c_str(),i->c_str());
1790
1791         this->WriteNumeric(RPL_RULESEND, "%s :End of RULES command.",this->nick.c_str());
1792 }
1793
1794 void User::IncreasePenalty(int increase)
1795 {
1796         this->Penalty += increase;
1797 }
1798
1799 void User::DecreasePenalty(int decrease)
1800 {
1801         this->Penalty -= decrease;
1802 }
1803
1804 void FakeUser::SetFakeServer(std::string name)
1805 {
1806         this->nick = name;
1807         this->server = nick.c_str();
1808 }
1809
1810 const std::string FakeUser::GetFullHost()
1811 {
1812         if (*ServerInstance->Config->HideWhoisServer)
1813                 return ServerInstance->Config->HideWhoisServer;
1814         return nick;
1815 }
1816
1817 const std::string FakeUser::GetFullRealHost()
1818 {
1819         if (*ServerInstance->Config->HideWhoisServer)
1820                 return ServerInstance->Config->HideWhoisServer;
1821         return nick;
1822 }
1823
1824 ConnectClass::ConnectClass(char t, const std::string& mask)
1825         : type(t), name("unnamed"), registration_timeout(0), host(mask),
1826         pingtime(0), pass(""), hash(""), softsendqmax(0), hardsendqmax(0),
1827         recvqmax(0), maxlocal(0), maxglobal(0), maxchans(0), port(0), limit(0),
1828         RefCount(1)
1829 {
1830 }
1831
1832 ConnectClass::ConnectClass(char t, const std::string& mask, const ConnectClass& parent)
1833         : type(t), name("unnamed"),
1834         registration_timeout(parent.registration_timeout), host(mask),
1835         pingtime(parent.pingtime), pass(parent.pass), hash(parent.hash),
1836         softsendqmax(parent.softsendqmax), hardsendqmax(parent.hardsendqmax),
1837         recvqmax(parent.recvqmax), maxlocal(parent.maxlocal),
1838         maxglobal(parent.maxglobal), maxchans(parent.maxchans),
1839         port(parent.port), limit(parent.limit), RefCount(1)
1840 {
1841 }
1842
1843 void ConnectClass::Update(const ConnectClass* src)
1844 {
1845         name = src->name;
1846         registration_timeout = src->registration_timeout;
1847         host = src->host;
1848         pingtime = src->pingtime;
1849         pass = src->pass;
1850         hash = src->hash;
1851         softsendqmax = src->softsendqmax;
1852         hardsendqmax = src->hardsendqmax;
1853         recvqmax = src->recvqmax;
1854         maxlocal = src->maxlocal;
1855         maxglobal = src->maxglobal;
1856         limit = src->limit;
1857 }