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->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 bool 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 true;
 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->AllowedOperCommands)
 594         {
 595                 delete AllowedOperCommands;
 596                 AllowedOperCommands = NULL;
 597         }
 598
 599         if (this->AllowedPrivs)
 600         {
 601                 delete AllowedPrivs;
 602                 AllowedPrivs = NULL;
 603         }
 604
 605         this->InvalidateCache();
 606         this->DecrementModes();
 607
 608         if (client_sa.sa.sa_family != AF_UNSPEC)
 609                 ServerInstance->Users->RemoveCloneCounts(this);
 610
 611         ServerInstance->Users->uuidlist->erase(uuid);
 612         uuid.clear();
 613         return true;
 614 }
 615
 616 void User::Oper(const std::string &opertype, const std::string &opername)
 617 {
 618         if (this->IsModeSet('o'))
 619                 this->UnOper();
 620
 621         this->modes[UM_OPERATOR] = 1;
 622         this->WriteServ("MODE %s :+o", this->nick.c_str());
 623         FOREACH_MOD(I_OnOper, OnOper(this, opertype));
 624
 625         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());
 626         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()));
 627
 628         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());
 629         this->oper.assign(opertype, 0, 512);
 630         ServerInstance->Users->all_opers.push_back(this);
 631
 632         /*
 633          * This might look like it's in the wrong place.
 634          * It is *not*!
 635          *
 636          * 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.
 637          * -- w00t
 638          */
 639         opertype_t::iterator iter_opertype = ServerInstance->Config->opertypes.find(this->oper.c_str());
 640         if (iter_opertype != ServerInstance->Config->opertypes.end())
 641         {
 642                 if (AllowedOperCommands)
 643                         AllowedOperCommands->clear();
 644                 else
 645                         AllowedOperCommands = new std::set<std::string>;
 646
 647                 if (AllowedPrivs)
 648                         AllowedPrivs->clear();
 649                 else
 650                         AllowedPrivs = new std::set<std::string>;
 651
 652                 AllowedUserModes.reset();
 653                 AllowedChanModes.reset();
 654                 this->AllowedUserModes['o' - 'A'] = true; // Call me paranoid if you want.
 655
 656                 std::string myclass, mycmd, mypriv;
 657                 irc::spacesepstream Classes(iter_opertype->second.c_str());
 658                 while (Classes.GetToken(myclass))
 659                 {
 660                         operclass_t::iterator iter_operclass = ServerInstance->Config->operclass.find(myclass.c_str());
 661                         if (iter_operclass != ServerInstance->Config->operclass.end())
 662                         {
 663                                 /* Process commands */
 664                                 irc::spacesepstream CommandList(iter_operclass->second.commandlist);
 665                                 while (CommandList.GetToken(mycmd))
 666                                 {
 667                                         this->AllowedOperCommands->insert(mycmd);
 668                                 }
 669
 670                                 irc::spacesepstream PrivList(iter_operclass->second.privs);
 671                                 while (PrivList.GetToken(mypriv))
 672                                 {
 673                                         this->AllowedPrivs->insert(mypriv);
 674                                 }
 675
 676                                 for (unsigned char* c = (unsigned char*)iter_operclass->second.umodelist.c_str(); *c; ++c)
 677                                 {
 678                                         if (*c == '*')
 679                                         {
 680                                                 this->AllowedUserModes.set();
 681                                         }
 682                                         else
 683                                         {
 684                                                 this->AllowedUserModes[*c - 'A'] = true;
 685                                         }
 686                                 }
 687
 688                                 for (unsigned char* c = (unsigned char*)iter_operclass->second.cmodelist.c_str(); *c; ++c)
 689                                 {
 690                                         if (*c == '*')
 691                                         {
 692                                                 this->AllowedChanModes.set();
 693                                         }
 694                                         else
 695                                         {
 696                                                 this->AllowedChanModes[*c - 'A'] = true;
 697                                         }
 698                                 }
 699                         }
 700                 }
 701         }
 702
 703         FOREACH_MOD(I_OnPostOper,OnPostOper(this, opertype, opername));
 704 }
 705
 706 void User::UnOper()
 707 {
 708         if (IS_OPER(this))
 709         {
 710                 /*
 711                  * unset their oper type (what IS_OPER checks).
 712                  * note, order is important - this must come before modes as -o attempts
 713                  * to call UnOper. -- w00t
 714                  */
 715                 this->oper.clear();
 716
 717
 718                 /* Remove all oper only modes from the user when the deoper - Bug #466*/
 719                 std::string moderemove("-");
 720
 721                 for (unsigned char letter = 'A'; letter <= 'z'; letter++)
 722                 {
 723                         ModeHandler* mh = ServerInstance->Modes->FindMode(letter, MODETYPE_USER);
 724                         if (mh && mh->NeedsOper())
 725                                 moderemove += letter;
 726                 }
 727
 728
 729                 std::vector<std::string> parameters;
 730                 parameters.push_back(this->nick);
 731                 parameters.push_back(moderemove);
 732
 733                 ServerInstance->Parser->CallHandler("MODE", parameters, this);
 734
 735                 /* remove the user from the oper list. Will remove multiple entries as a safeguard against bug #404 */
 736                 ServerInstance->Users->all_opers.remove(this);
 737
 738                 if (AllowedOperCommands)
 739                 {
 740                         delete AllowedOperCommands;
 741                         AllowedOperCommands = NULL;
 742                 }
 743
 744                 if (AllowedPrivs)
 745                 {
 746                         delete AllowedPrivs;
 747                         AllowedPrivs = NULL;
 748                 }
 749
 750                 AllowedUserModes.reset();
 751                 AllowedChanModes.reset();
 752                 this->modes[UM_OPERATOR] = 0;
 753         }
 754 }
 755
 756 /* adds or updates an entry in the whowas list */
 757 void User::AddToWhoWas()
 758 {
 759         Module* whowas = ServerInstance->Modules->Find("cmd_whowas.so");
 760         if (whowas)
 761         {
 762                 WhowasRequest req(NULL, whowas, WhowasRequest::WHOWAS_ADD);
 763                 req.user = this;
 764                 req.Send();
 765         }
 766 }
 767
 768 /*
 769  * Check class restrictions
 770  */
 771 void User::CheckClass()
 772 {
 773         ConnectClass* a = this->MyClass;
 774
 775         if ((!a) || (a->type == CC_DENY))
 776         {
 777                 ServerInstance->Users->QuitUser(this, "Unauthorised connection");
 778                 return;
 779         }
 780         else if ((a->GetMaxLocal()) && (ServerInstance->Users->LocalCloneCount(this) > a->GetMaxLocal()))
 781         {
 782                 ServerInstance->Users->QuitUser(this, "No more connections allowed from your host via this connect class (local)");
 783                 ServerInstance->SNO->WriteToSnoMask('a', "WARNING: maximum LOCAL connections (%ld) exceeded for IP %s", a->GetMaxLocal(), this->GetIPString());
 784                 return;
 785         }
 786         else if ((a->GetMaxGlobal()) && (ServerInstance->Users->GlobalCloneCount(this) > a->GetMaxGlobal()))
 787         {
 788                 ServerInstance->Users->QuitUser(this, "No more connections allowed from your host via this connect class (global)");
 789                 ServerInstance->SNO->WriteToSnoMask('a', "WARNING: maximum GLOBAL connections (%ld) exceeded for IP %s", a->GetMaxGlobal(), this->GetIPString());
 790                 return;
 791         }
 792
 793         this->nping = ServerInstance->Time() + a->GetPingTime() + ServerInstance->Config->dns_timeout;
 794 }
 795
 796 bool User::CheckLines(bool doZline)
 797 {
 798         const char* check[] = { "G" , "K", (doZline) ? "Z" : NULL, NULL };
 799
 800         if (!this->exempt)
 801         {
 802                 for (int n = 0; check[n]; ++n)
 803                 {
 804                         XLine *r = ServerInstance->XLines->MatchesLine(check[n], this);
 805
 806                         if (r)
 807                         {
 808                                 r->Apply(this);
 809                                 return true;
 810                         }
 811                 }
 812         }
 813
 814         return false;
 815 }
 816
 817 void User::FullConnect()
 818 {
 819         ServerInstance->stats->statsConnects++;
 820         this->idle_lastmsg = ServerInstance->Time();
 821
 822         /*
 823          * You may be thinking "wtf, we checked this in User::AddClient!" - and yes, we did, BUT.
 824          * At the time AddClient is called, we don't have a resolved host, by here we probably do - which
 825          * may put the user into a totally seperate class with different restrictions! so we *must* check again.
 826          * Don't remove this! -- w00t
 827          */
 828         this->SetClass();
 829
 830         /* Check the password, if one is required by the user's connect class.
 831          * This CANNOT be in CheckClass(), because that is called prior to PASS as well!
 832          */
 833         if (this->MyClass && !this->MyClass->GetPass().empty() && !this->haspassed)
 834         {
 835                 ServerInstance->Users->QuitUser(this, "Invalid password");
 836                 return;
 837         }
 838
 839         if (this->CheckLines())
 840                 return;
 841
 842         this->WriteServ("NOTICE Auth :Welcome to \002%s\002!",ServerInstance->Config->Network.c_str());
 843         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());
 844         this->WriteNumeric(RPL_YOURHOSTIS, "%s :Your host is %s, running version InspIRCd-2.0",this->nick.c_str(),ServerInstance->Config->ServerName.c_str());
 845         this->WriteNumeric(RPL_SERVERCREATED, "%s :This server was created %s %s", this->nick.c_str(), __TIME__, __DATE__);
 846         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());
 847
 848         ServerInstance->Config->Send005(this);
 849         this->WriteNumeric(RPL_YOURUUID, "%s %s :your unique ID", this->nick.c_str(), this->uuid.c_str());
 850
 851
 852         this->ShowMOTD();
 853
 854         /* Now registered */
 855         if (ServerInstance->Users->unregistered_count)
 856                 ServerInstance->Users->unregistered_count--;
 857
 858         /* Trigger LUSERS output, give modules a chance too */
 859         ModResult MOD_RESULT;
 860         std::string command("LUSERS");
 861         std::vector<std::string> parameters;
 862         FIRST_MOD_RESULT(OnPreCommand, MOD_RESULT, (command, parameters, this, true, "LUSERS"));
 863         if (!MOD_RESULT)
 864                 ServerInstance->CallCommandHandler(command, parameters, this);
 865
 866         /*
 867          * We don't set REG_ALL until triggering OnUserConnect, so some module events don't spew out stuff
 868          * for a user that doesn't exist yet.
 869          */
 870         FOREACH_MOD(I_OnUserConnect,OnUserConnect(this));
 871
 872         this->registered = REG_ALL;
 873
 874         FOREACH_MOD(I_OnPostConnect,OnPostConnect(this));
 875
 876         ServerInstance->SNO->WriteToSnoMask('c',"Client connecting on port %d: %s!%s@%s [%s] [%s]",
 877                 this->GetServerPort(), this->nick.c_str(), this->ident.c_str(), this->host.c_str(), this->GetIPString(), this->fullname.c_str());
 878         ServerInstance->Logs->Log("BANCACHE", DEBUG, "BanCache: Adding NEGATIVE hit for %s", this->GetIPString());
 879         ServerInstance->BanCache->AddHit(this->GetIPString(), "", "");
 880 }
 881
 882 /** User::UpdateNick()
 883  * re-allocates a nick in the user_hash after they change nicknames,
 884  * returns a pointer to the new user as it may have moved
 885  */
 886 User* User::UpdateNickHash(const char* New)
 887 {
 888         //user_hash::iterator newnick;
 889         user_hash::iterator oldnick = ServerInstance->Users->clientlist->find(this->nick);
 890
 891         if (!irc::string(this->nick.c_str()).compare(New))
 892                 return oldnick->second;
 893
 894         if (oldnick == ServerInstance->Users->clientlist->end())
 895                 return NULL; /* doesnt exist */
 896
 897         User* olduser = oldnick->second;
 898         ServerInstance->Users->clientlist->erase(oldnick);
 899         (*(ServerInstance->Users->clientlist))[New] = olduser;
 900         return olduser;
 901 }
 902
 903 void User::InvalidateCache()
 904 {
 905         /* Invalidate cache */
 906         cached_fullhost.clear();
 907         cached_hostip.clear();
 908         cached_makehost.clear();
 909         cached_fullrealhost.clear();
 910 }
 911
 912 bool User::ForceNickChange(const char* newnick)
 913 {
 914         ModResult MOD_RESULT;
 915
 916         this->InvalidateCache();
 917
 918         NICKForced.set(this, 1);
 919         FIRST_MOD_RESULT(OnUserPreNick, MOD_RESULT, (this, newnick));
 920         NICKForced.set(this, 0);
 921
 922         if (MOD_RESULT == MOD_RES_DENY)
 923         {
 924                 ServerInstance->stats->statsCollisions++;
 925                 return false;
 926         }
 927
 928         std::deque<classbase*> dummy;
 929         Command* nickhandler = ServerInstance->Parser->GetHandler("NICK");
 930         if (nickhandler) // wtfbbq, when would this not be here
 931         {
 932                 std::vector<std::string> parameters;
 933                 parameters.push_back(newnick);
 934                 NICKForced.set(this, 1);
 935                 bool result = (ServerInstance->Parser->CallHandler("NICK", parameters, this) == CMD_SUCCESS);
 936                 NICKForced.set(this, 0);
 937                 return result;
 938         }
 939
 940         // Unreachable, we hope
 941         return false;
 942 }
 943
 944 int User::GetServerPort()
 945 {
 946         switch (this->server_sa.sa.sa_family)
 947         {
 948                 case AF_INET6:
 949                         return htons(this->server_sa.in6.sin6_port);
 950                 case AF_INET:
 951                         return htons(this->server_sa.in4.sin_port);
 952         }
 953         return 0;
 954 }
 955
 956 const char* User::GetCIDRMask(int range)
 957 {
 958         static char buf[44];
 959
 960         if (range < 0)
 961                 throw "Negative range, sorry, no.";
 962
 963         /*
 964          * Original code written by Oliver Lupton (Om).
 965          * Integrated by me. Thanks. :) -- w00t
 966          */
 967         switch (this->client_sa.sa.sa_family)
 968         {
 969                 case AF_INET6:
 970                 {
 971                         /* unsigned char s6_addr[16]; */
 972                         struct in6_addr v6;
 973                         int i, bytestozero, extrabits;
 974                         char buffer[40];
 975
 976                         if(range > 128)
 977                                 throw "CIDR mask width greater than address width (IPv6, 128 bit)";
 978
 979                         /* To create the CIDR mask we want to set all the bits after 'range' bits of the address
 980                          * to zero. This means the last (128 - range) bits of the address must be set to zero.
 981                          * Hence this number divided by 8 is the number of whole bytes from the end of the address
 982                          * which must be set to zero.
 983                          */
 984                         bytestozero = (128 - range) / 8;
 985
 986                         /* Some of the least significant bits of the next most significant byte may also have to
 987                          * be zeroed. The number of bits is the remainder of the above division.
 988                          */
 989                         extrabits = (128 - range) % 8;
 990
 991                         /* Populate our working struct with the parts of the user's IP which are required in the
 992                          * final CIDR mask. Set all the subsequent bytes to zero.
 993                          * (16 - bytestozero) is the number of bytes which must be populated with actual IP data.
 994                          */
 995                         for(i = 0; i < (16 - bytestozero); i++)
 996                         {
 997                                 v6.s6_addr[i] = client_sa.in6.sin6_addr.s6_addr[i];
 998                         }
 999
1000                         /* And zero all the remaining bytes in the IP. */
1001                         for(; i < 16; i++)
1002                         {
1003                                 v6.s6_addr[i] = 0;
1004                         }
1005
1006                         /* And finally, zero the extra bits required. */
1007                         v6.s6_addr[15 - bytestozero] = (v6.s6_addr[15 - bytestozero] >> extrabits) << extrabits;
1008
1009                         snprintf(buf, 44, "%s/%d", inet_ntop(AF_INET6, &v6, buffer, 40), range);
1010                         return buf;
1011                 }
1012                 break;
1013                 case AF_INET:
1014                 {
1015                         struct in_addr v4;
1016                         char buffer[16];
1017
1018                         if (range > 32)
1019                                 throw "CIDR mask width greater than address width (IPv4, 32 bit)";
1020
1021                         /* Users already have a sockaddr* pointer (User::ip) which contains either a v4 or v6 structure */
1022                         v4.s_addr = client_sa.in4.sin_addr.s_addr;
1023
1024                         /* To create the CIDR mask we want to set all the bits after 'range' bits of the address
1025                          * to zero. This means the last (32 - range) bits of the address must be set to zero.
1026                          * This is done by shifting the value right and then back left by (32 - range) bits.
1027                          */
1028                         if(range > 0)
1029                         {
1030                                 v4.s_addr = ntohl(v4.s_addr);
1031                                 v4.s_addr = (v4.s_addr >> (32 - range)) << (32 - range);
1032                                 v4.s_addr = htonl(v4.s_addr);
1033                         }
1034                         else
1035                         {
1036                                 /* a range of zero would cause a 32 bit value to be shifted by 32 bits.
1037                                  * this has undefined behaviour, but for CIDR purposes the resulting mask
1038                                  * from a.b.c.d/0 is 0.0.0.0/0
1039                                  */
1040                                 v4.s_addr = 0;
1041                         }
1042
1043                         snprintf(buf, 44, "%s/%d", inet_ntop(AF_INET, &v4, buffer, 16), range);
1044                         return buf;
1045                 }
1046                 break;
1047         }
1048
1049         return ""; // unused, but oh well
1050 }
1051
1052 const char* User::GetIPString()
1053 {
1054         int port;
1055         if (cachedip.empty())
1056         {
1057                 irc::sockets::satoap(&client_sa, cachedip, port);
1058                 /* IP addresses starting with a : on irc are a Bad Thing (tm) */
1059                 if (cachedip.c_str()[0] == ':')
1060                         cachedip.insert(0,1,'0');
1061         }
1062
1063         return cachedip.c_str();
1064 }
1065
1066 bool User::SetClientIP(const char* sip)
1067 {
1068         this->cachedip = "";
1069         return irc::sockets::aptosa(sip, 0, &client_sa);
1070 }
1071
1072 static std::string wide_newline("\r\n");
1073
1074 void User::Write(const std::string& text)
1075 {
1076         if (!ServerInstance->SE->BoundsCheckFd(this))
1077                 return;
1078
1079         if (text.length() > MAXBUF - 2)
1080         {
1081                 // this should happen rarely or never. Crop the string at 512 and try again.
1082                 std::string try_again = text.substr(0, MAXBUF - 2);
1083                 Write(try_again);
1084                 return;
1085         }
1086
1087         ServerInstance->Logs->Log("USEROUTPUT", DEBUG,"C[%d] O %s", this->GetFd(), text.c_str());
1088
1089         this->AddWriteBuf(text);
1090         this->AddWriteBuf(wide_newline);
1091
1092         ServerInstance->stats->statsSent += text.length() + 2;
1093         this->bytes_out += text.length() + 2;
1094         this->cmds_out++;
1095 }
1096
1097 /** Write()
1098  */
1099 void User::Write(const char *text, ...)
1100 {
1101         va_list argsPtr;
1102         char textbuffer[MAXBUF];
1103
1104         va_start(argsPtr, text);
1105         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1106         va_end(argsPtr);
1107
1108         this->Write(std::string(textbuffer));
1109 }
1110
1111 void User::WriteServ(const std::string& text)
1112 {
1113         this->Write(":%s %s",ServerInstance->Config->ServerName.c_str(),text.c_str());
1114 }
1115
1116 /** WriteServ()
1117  *  Same as Write(), except `text' is prefixed with `:server.name '.
1118  */
1119 void User::WriteServ(const char* text, ...)
1120 {
1121         va_list argsPtr;
1122         char textbuffer[MAXBUF];
1123
1124         va_start(argsPtr, text);
1125         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1126         va_end(argsPtr);
1127
1128         this->WriteServ(std::string(textbuffer));
1129 }
1130
1131
1132 void User::WriteNumeric(unsigned int numeric, const char* text, ...)
1133 {
1134         va_list argsPtr;
1135         char textbuffer[MAXBUF];
1136
1137         va_start(argsPtr, text);
1138         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1139         va_end(argsPtr);
1140
1141         this->WriteNumeric(numeric, std::string(textbuffer));
1142 }
1143
1144 void User::WriteNumeric(unsigned int numeric, const std::string &text)
1145 {
1146         char textbuffer[MAXBUF];
1147         ModResult MOD_RESULT;
1148
1149         FIRST_MOD_RESULT(OnNumeric, MOD_RESULT, (this, numeric, text));
1150
1151         if (MOD_RESULT == MOD_RES_DENY)
1152                 return;
1153
1154         snprintf(textbuffer,MAXBUF,":%s %03u %s",ServerInstance->Config->ServerName.c_str(), numeric, text.c_str());
1155         this->Write(std::string(textbuffer));
1156 }
1157
1158 void User::WriteFrom(User *user, const std::string &text)
1159 {
1160         char tb[MAXBUF];
1161
1162         snprintf(tb,MAXBUF,":%s %s",user->GetFullHost().c_str(),text.c_str());
1163
1164         this->Write(std::string(tb));
1165 }
1166
1167
1168 /* write text from an originating user to originating user */
1169
1170 void User::WriteFrom(User *user, const char* text, ...)
1171 {
1172         va_list argsPtr;
1173         char textbuffer[MAXBUF];
1174
1175         va_start(argsPtr, text);
1176         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1177         va_end(argsPtr);
1178
1179         this->WriteFrom(user, std::string(textbuffer));
1180 }
1181
1182
1183 /* write text to an destination user from a source user (e.g. user privmsg) */
1184
1185 void User::WriteTo(User *dest, const char *data, ...)
1186 {
1187         char textbuffer[MAXBUF];
1188         va_list argsPtr;
1189
1190         va_start(argsPtr, data);
1191         vsnprintf(textbuffer, MAXBUF, data, argsPtr);
1192         va_end(argsPtr);
1193
1194         this->WriteTo(dest, std::string(textbuffer));
1195 }
1196
1197 void User::WriteTo(User *dest, const std::string &data)
1198 {
1199         dest->WriteFrom(this, data);
1200 }
1201
1202
1203 void User::WriteCommon(const char* text, ...)
1204 {
1205         char textbuffer[MAXBUF];
1206         va_list argsPtr;
1207
1208         if (this->registered != REG_ALL)
1209                 return;
1210
1211         va_start(argsPtr, text);
1212         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1213         va_end(argsPtr);
1214
1215         this->WriteCommon(std::string(textbuffer));
1216 }
1217
1218 void User::WriteCommon(const std::string &text)
1219 {
1220         bool sent_to_at_least_one = false;
1221         char tb[MAXBUF];
1222
1223         if (this->registered != REG_ALL)
1224                 return;
1225
1226         uniq_id++;
1227
1228         if (!already_sent)
1229                 InitializeAlreadySent(ServerInstance->SE);
1230
1231         /* We dont want to be doing this n times, just once */
1232         snprintf(tb,MAXBUF,":%s %s",this->GetFullHost().c_str(),text.c_str());
1233         std::string out = tb;
1234
1235         for (UCListIter v = this->chans.begin(); v != this->chans.end(); v++)
1236         {
1237                 const UserMembList* ulist = (*v)->GetUsers();
1238                 for (UserMembList::const_iterator i = ulist->begin(); i != ulist->end(); i++)
1239                 {
1240                         if ((IS_LOCAL(i->first)) && (already_sent[i->first->fd] != uniq_id))
1241                         {
1242                                 already_sent[i->first->fd] = uniq_id;
1243                                 i->first->Write(out);
1244                                 sent_to_at_least_one = true;
1245                         }
1246                 }
1247         }
1248
1249         /*
1250          * if the user was not in any channels, no users will receive the text. Make sure the user
1251          * receives their OWN message for WriteCommon
1252          */
1253         if (!sent_to_at_least_one)
1254         {
1255                 this->Write(std::string(tb));
1256         }
1257 }
1258
1259
1260 /* write a formatted string to all users who share at least one common
1261  * channel, NOT including the source user e.g. for use in QUIT
1262  */
1263
1264 void User::WriteCommonExcept(const char* text, ...)
1265 {
1266         char textbuffer[MAXBUF];
1267         va_list argsPtr;
1268
1269         va_start(argsPtr, text);
1270         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1271         va_end(argsPtr);
1272
1273         this->WriteCommonExcept(std::string(textbuffer));
1274 }
1275
1276 void User::WriteCommonQuit(const std::string &normal_text, const std::string &oper_text)
1277 {
1278         char tb1[MAXBUF];
1279         char tb2[MAXBUF];
1280
1281         if (this->registered != REG_ALL)
1282                 return;
1283
1284         uniq_id++;
1285
1286         if (!already_sent)
1287                 InitializeAlreadySent(ServerInstance->SE);
1288
1289         snprintf(tb1,MAXBUF,":%s QUIT :%s",this->GetFullHost().c_str(),normal_text.c_str());
1290         snprintf(tb2,MAXBUF,":%s QUIT :%s",this->GetFullHost().c_str(),oper_text.c_str());
1291         std::string out1 = tb1;
1292         std::string out2 = tb2;
1293
1294         for (UCListIter v = this->chans.begin(); v != this->chans.end(); v++)
1295         {
1296                 const UserMembList* ulist = (*v)->GetUsers();
1297                 for (UserMembList::const_iterator i = ulist->begin(); i != ulist->end(); i++)
1298                 {
1299                         User* u = i->first;
1300                         if (IS_LOCAL(u) && !u->quitting && (already_sent[u->fd] != uniq_id))
1301                         {
1302                                 already_sent[u->fd] = uniq_id;
1303                                 u->Write(IS_OPER(u) ? out2 : out1);
1304                         }
1305                 }
1306         }
1307 }
1308
1309 void User::WriteCommonExcept(const std::string &text)
1310 {
1311         char tb1[MAXBUF];
1312         std::string out1;
1313
1314         if (this->registered != REG_ALL)
1315                 return;
1316
1317         uniq_id++;
1318
1319         if (!already_sent)
1320                 InitializeAlreadySent(ServerInstance->SE);
1321
1322         snprintf(tb1,MAXBUF,":%s %s",this->GetFullHost().c_str(),text.c_str());
1323         out1 = tb1;
1324
1325         for (UCListIter v = this->chans.begin(); v != this->chans.end(); v++)
1326         {
1327                 const UserMembList* ulist = (*v)->GetUsers();
1328                 for (UserMembList::const_iterator i = ulist->begin(); i != ulist->end(); i++)
1329                 {
1330                         if (this != i->first)
1331                         {
1332                                 if ((IS_LOCAL(i->first)) && (already_sent[i->first->fd] != uniq_id))
1333                                 {
1334                                         already_sent[i->first->fd] = uniq_id;
1335                                         i->first->Write(out1);
1336                                 }
1337                         }
1338                 }
1339         }
1340
1341 }
1342
1343 void User::WriteWallOps(const std::string &text)
1344 {
1345         std::string wallop("WALLOPS :");
1346         wallop.append(text);
1347
1348         for (std::vector<User*>::const_iterator i = ServerInstance->Users->local_users.begin(); i != ServerInstance->Users->local_users.end(); i++)
1349         {
1350                 User* t = *i;
1351                 if (t->IsModeSet('w'))
1352                         this->WriteTo(t,wallop);
1353         }
1354 }
1355
1356 void User::WriteWallOps(const char* text, ...)
1357 {
1358         if (!IS_LOCAL(this))
1359                 return;
1360
1361         char textbuffer[MAXBUF];
1362         va_list argsPtr;
1363
1364         va_start(argsPtr, text);
1365         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1366         va_end(argsPtr);
1367
1368         this->WriteWallOps(std::string(textbuffer));
1369 }
1370
1371 /* return 0 or 1 depending if users u and u2 share one or more common channels
1372  * (used by QUIT, NICK etc which arent channel specific notices)
1373  *
1374  * The old algorithm in 1.0 for this was relatively inefficient, iterating over
1375  * the first users channels then the second users channels within the outer loop,
1376  * therefore it was a maximum of x*y iterations (upon returning 0 and checking
1377  * all possible iterations). However this new function instead checks against the
1378  * channel's userlist in the inner loop which is a std::map<User*,User*>
1379  * and saves us time as we already know what pointer value we are after.
1380  * Don't quote me on the maths as i am not a mathematician or computer scientist,
1381  * but i believe this algorithm is now x+(log y) maximum iterations instead.
1382  */
1383 bool User::SharesChannelWith(User *other)
1384 {
1385         if ((!other) || (this->registered != REG_ALL) || (other->registered != REG_ALL))
1386                 return false;
1387
1388         /* Outer loop */
1389         for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1390         {
1391                 /* Eliminate the inner loop (which used to be ~equal in size to the outer loop)
1392                  * by replacing it with a map::find which *should* be more efficient
1393                  */
1394                 if ((*i)->HasUser(other))
1395                         return true;
1396         }
1397         return false;
1398 }
1399
1400 bool User::ChangeName(const char* gecos)
1401 {
1402         if (!this->fullname.compare(gecos))
1403                 return true;
1404
1405         if (IS_LOCAL(this))
1406         {
1407                 ModResult MOD_RESULT;
1408                 FIRST_MOD_RESULT(OnChangeLocalUserGECOS, MOD_RESULT, (this,gecos));
1409                 if (MOD_RESULT == MOD_RES_DENY)
1410                         return false;
1411                 FOREACH_MOD(I_OnChangeName,OnChangeName(this,gecos));
1412         }
1413         this->fullname.assign(gecos, 0, ServerInstance->Config->Limits.MaxGecos);
1414
1415         return true;
1416 }
1417
1418 void User::DoHostCycle(const std::string &quitline)
1419 {
1420         char buffer[MAXBUF];
1421
1422         ModResult result = MOD_RES_PASSTHRU;
1423         FIRST_MOD_RESULT(OnHostCycle, result, (this));
1424
1425         if (result == MOD_RES_DENY)
1426                 return;
1427         if (result == MOD_RES_PASSTHRU && !ServerInstance->Config->CycleHosts)
1428                 return;
1429
1430         uniq_id++;
1431
1432         if (!already_sent)
1433                 InitializeAlreadySent(ServerInstance->SE);
1434
1435         for (UCListIter v = this->chans.begin(); v != this->chans.end(); v++)
1436         {
1437                 Channel* c = *v;
1438                 snprintf(buffer, MAXBUF, ":%s JOIN %s", GetFullHost().c_str(), c->name.c_str());
1439                 std::string joinline(buffer);
1440                 std::string modeline = ServerInstance->Modes->ModeString(this, c);
1441                 if (modeline.length() > 0)
1442                 {
1443                         snprintf(buffer, MAXBUF, ":%s MODE %s +%s", GetFullHost().c_str(), c->name.c_str(), modeline.c_str());
1444                         modeline = buffer;
1445                 }
1446
1447                 const UserMembList *ulist = c->GetUsers();
1448                 for (UserMembList::const_iterator i = ulist->begin(); i != ulist->end(); i++)
1449                 {
1450                         User* u = i->first;
1451                         if (u == this || !IS_LOCAL(u))
1452                                 continue;
1453
1454                         if (already_sent[i->first->fd] != uniq_id)
1455                         {
1456                                 u->Write(quitline);
1457                                 already_sent[i->first->fd] = uniq_id;
1458                         }
1459                         u->Write(joinline);
1460                         if (modeline.length() > 0)
1461                                 u->Write(modeline);
1462                 }
1463         }
1464 }
1465
1466 bool User::ChangeDisplayedHost(const char* shost)
1467 {
1468         if (dhost == shost)
1469                 return true;
1470
1471         if (IS_LOCAL(this))
1472         {
1473                 ModResult MOD_RESULT;
1474                 FIRST_MOD_RESULT(OnChangeLocalUserHost, MOD_RESULT, (this,shost));
1475                 if (MOD_RESULT == MOD_RES_DENY)
1476                         return false;
1477         }
1478
1479         FOREACH_MOD(I_OnChangeHost, OnChangeHost(this,shost));
1480
1481         std::string quitstr = ":" + GetFullHost() + " QUIT :Changing host";
1482
1483         /* Fix by Om: User::dhost is 65 long, this was truncating some long hosts */
1484         this->dhost.assign(shost, 0, 64);
1485
1486         this->InvalidateCache();
1487
1488         this->DoHostCycle(quitstr);
1489
1490         if (IS_LOCAL(this))
1491                 this->WriteNumeric(RPL_YOURDISPLAYEDHOST, "%s %s :is now your displayed host",this->nick.c_str(),this->dhost.c_str());
1492
1493         return true;
1494 }
1495
1496 bool User::ChangeIdent(const char* newident)
1497 {
1498         if (this->ident == newident)
1499                 return true;
1500
1501         FOREACH_MOD(I_OnChangeIdent, OnChangeIdent(this,newident));
1502
1503         std::string quitstr = ":" + GetFullHost() + " QUIT :Changing ident";
1504
1505         this->ident.assign(newident, 0, ServerInstance->Config->Limits.IdentMax + 1);
1506
1507         this->InvalidateCache();
1508
1509         this->DoHostCycle(quitstr);
1510
1511         return true;
1512 }
1513
1514 void User::SendAll(const char* command, const char* text, ...)
1515 {
1516         char textbuffer[MAXBUF];
1517         char formatbuffer[MAXBUF];
1518         va_list argsPtr;
1519
1520         va_start(argsPtr, text);
1521         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1522         va_end(argsPtr);
1523
1524         snprintf(formatbuffer,MAXBUF,":%s %s $* :%s", this->GetFullHost().c_str(), command, textbuffer);
1525         std::string fmt = formatbuffer;
1526
1527         for (std::vector<User*>::const_iterator i = ServerInstance->Users->local_users.begin(); i != ServerInstance->Users->local_users.end(); i++)
1528         {
1529                 (*i)->Write(fmt);
1530         }
1531 }
1532
1533
1534 std::string User::ChannelList(User* source, bool spy)
1535 {
1536         std::string list;
1537
1538         for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1539         {
1540                 Channel* c = *i;
1541                 /* If the target is the sender, neither +p nor +s is set, or
1542                  * the channel contains the user, it is not a spy channel
1543                  */
1544                 if (spy != (source == this || !(c->IsModeSet('p') || c->IsModeSet('s')) || c->HasUser(source)))
1545                         list.append(c->GetPrefixChar(this)).append(c->name).append(" ");
1546         }
1547
1548         return list;
1549 }
1550
1551 void User::SplitChanList(User* dest, const std::string &cl)
1552 {
1553         std::string line;
1554         std::ostringstream prefix;
1555         std::string::size_type start, pos, length;
1556
1557         prefix << this->nick << " " << dest->nick << " :";
1558         line = prefix.str();
1559         int namelen = ServerInstance->Config->ServerName.length() + 6;
1560
1561         for (start = 0; (pos = cl.find(' ', start)) != std::string::npos; start = pos+1)
1562         {
1563                 length = (pos == std::string::npos) ? cl.length() : pos;
1564
1565                 if (line.length() + namelen + length - start > 510)
1566                 {
1567                         ServerInstance->SendWhoisLine(this, dest, 319, "%s", line.c_str());
1568                         line = prefix.str();
1569                 }
1570
1571                 if(pos == std::string::npos)
1572                 {
1573                         line.append(cl.substr(start, length - start));
1574                         break;
1575                 }
1576                 else
1577                 {
1578                         line.append(cl.substr(start, length - start + 1));
1579                 }
1580         }
1581
1582         if (line.length())
1583         {
1584                 ServerInstance->SendWhoisLine(this, dest, 319, "%s", line.c_str());
1585         }
1586 }
1587
1588 /*
1589  * Sets a user's connection class.
1590  * If the class name is provided, it will be used. Otherwise, the class will be guessed using host/ip/ident/etc.
1591  * NOTE: If the <ALLOW> or <DENY> tag specifies an ip, and this user resolves,
1592  * then their ip will be taken as 'priority' anyway, so for example,
1593  * <connect allow="127.0.0.1"> will match joe!bloggs@localhost
1594  */
1595 ConnectClass* User::SetClass(const std::string &explicit_name)
1596 {
1597         ConnectClass *found = NULL;
1598
1599         if (!IS_LOCAL(this))
1600                 return NULL;
1601
1602         ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Setting connect class for UID %s", this->uuid.c_str());
1603
1604         if (!explicit_name.empty())
1605         {
1606                 for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++)
1607                 {
1608                         ConnectClass* c = *i;
1609
1610                         if (explicit_name == c->name)
1611                         {
1612                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Explicitly set to %s", explicit_name.c_str());
1613                                 found = c;
1614                         }
1615                 }
1616         }
1617         else
1618         {
1619                 for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++)
1620                 {
1621                         ConnectClass* c = *i;
1622
1623                         if (c->type == CC_ALLOW)
1624                         {
1625                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "ALLOW %s %d %s", c->host.c_str(), c->GetPort(), c->GetName().c_str());
1626                         }
1627                         else
1628                         {
1629                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "DENY %s %d %s", c->GetHost().c_str(), c->GetPort(), c->GetName().c_str());
1630                         }
1631
1632                         /* check if host matches.. */
1633                         if (c->GetHost().length() && !InspIRCd::MatchCIDR(this->GetIPString(), c->GetHost(), NULL) &&
1634                             !InspIRCd::MatchCIDR(this->host, c->GetHost(), NULL))
1635                         {
1636                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "No host match (for %s)", c->GetHost().c_str());
1637                                 continue;
1638                         }
1639
1640                         /*
1641                          * deny change if change will take class over the limit check it HERE, not after we found a matching class,
1642                          * because we should attempt to find another class if this one doesn't match us. -- w00t
1643                          */
1644                         if (c->limit && (c->GetReferenceCount() >= c->limit))
1645                         {
1646                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "OOPS: Connect class limit (%lu) hit, denying", c->limit);
1647                                 continue;
1648                         }
1649
1650                         /* if it requires a port ... */
1651                         if (c->GetPort())
1652                         {
1653                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Requires port (%d)", c->GetPort());
1654
1655                                 /* and our port doesn't match, fail. */
1656                                 if (this->GetServerPort() != c->GetPort())
1657                                 {
1658                                         ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Port match failed (%d)", this->GetServerPort());
1659                                         continue;
1660                                 }
1661                         }
1662
1663                         /* we stop at the first class that meets ALL critera. */
1664                         found = c;
1665                         break;
1666                 }
1667         }
1668
1669         /*
1670          * Okay, assuming we found a class that matches.. switch us into that class, keeping refcounts up to date.
1671          */
1672         if (found)
1673         {
1674                 MyClass = found;
1675         }
1676
1677         return this->MyClass;
1678 }
1679
1680 /* looks up a users password for their connection class (<ALLOW>/<DENY> tags)
1681  * NOTE: If the <ALLOW> or <DENY> tag specifies an ip, and this user resolves,
1682  * then their ip will be taken as 'priority' anyway, so for example,
1683  * <connect allow="127.0.0.1"> will match joe!bloggs@localhost
1684  */
1685 ConnectClass* User::GetClass()
1686 {
1687         return this->MyClass;
1688 }
1689
1690 void User::PurgeEmptyChannels()
1691 {
1692         std::vector<Channel*> to_delete;
1693
1694         // firstly decrement the count on each channel
1695         for (UCListIter f = this->chans.begin(); f != this->chans.end(); f++)
1696         {
1697                 Channel* c = *f;
1698                 c->RemoveAllPrefixes(this);
1699                 if (c->DelUser(this) == 0)
1700                 {
1701                         /* No users left in here, mark it for deletion */
1702                         try
1703                         {
1704                                 to_delete.push_back(c);
1705                         }
1706                         catch (...)
1707                         {
1708                                 ServerInstance->Logs->Log("USERS", DEBUG,"Exception in User::PurgeEmptyChannels to_delete.push_back()");
1709                         }
1710                 }
1711         }
1712
1713         for (std::vector<Channel*>::iterator n = to_delete.begin(); n != to_delete.end(); n++)
1714         {
1715                 Channel* thischan = *n;
1716                 chan_hash::iterator i2 = ServerInstance->chanlist->find(thischan->name);
1717                 if (i2 != ServerInstance->chanlist->end())
1718                 {
1719                         ModResult MOD_RESULT;
1720                         FIRST_MOD_RESULT(OnChannelPreDelete, MOD_RESULT, (i2->second));
1721                         if (MOD_RESULT == MOD_RES_DENY)
1722                                 continue; // delete halted by module
1723                         FOREACH_MOD(I_OnChannelDelete,OnChannelDelete(i2->second));
1724                         delete i2->second;
1725                         ServerInstance->chanlist->erase(i2);
1726                         this->chans.erase(*n);
1727                 }
1728         }
1729
1730         this->UnOper();
1731 }
1732
1733 void User::ShowMOTD()
1734 {
1735         if (!ServerInstance->Config->MOTD.size())
1736         {
1737                 this->WriteNumeric(ERR_NOMOTD, "%s :Message of the day file is missing.",this->nick.c_str());
1738                 return;
1739         }
1740         this->WriteNumeric(RPL_MOTDSTART, "%s :%s message of the day", this->nick.c_str(), ServerInstance->Config->ServerName.c_str());
1741
1742         for (file_cache::iterator i = ServerInstance->Config->MOTD.begin(); i != ServerInstance->Config->MOTD.end(); i++)
1743                 this->WriteNumeric(RPL_MOTD, "%s :- %s",this->nick.c_str(),i->c_str());
1744
1745         this->WriteNumeric(RPL_ENDOFMOTD, "%s :End of message of the day.", this->nick.c_str());
1746 }
1747
1748 void User::ShowRULES()
1749 {
1750         if (!ServerInstance->Config->RULES.size())
1751         {
1752                 this->WriteNumeric(ERR_NORULES, "%s :RULES File is missing",this->nick.c_str());
1753                 return;
1754         }
1755
1756         this->WriteNumeric(RPL_RULESTART, "%s :- %s Server Rules -",this->nick.c_str(),ServerInstance->Config->ServerName.c_str());
1757
1758         for (file_cache::iterator i = ServerInstance->Config->RULES.begin(); i != ServerInstance->Config->RULES.end(); i++)
1759                 this->WriteNumeric(RPL_RULES, "%s :- %s",this->nick.c_str(),i->c_str());
1760
1761         this->WriteNumeric(RPL_RULESEND, "%s :End of RULES command.",this->nick.c_str());
1762 }
1763
1764 void User::IncreasePenalty(int increase)
1765 {
1766         this->Penalty += increase;
1767 }
1768
1769 void User::DecreasePenalty(int decrease)
1770 {
1771         this->Penalty -= decrease;
1772 }
1773
1774 void FakeUser::SetFakeServer(std::string name)
1775 {
1776         this->nick = name;
1777         this->server = name;
1778 }
1779
1780 const std::string FakeUser::GetFullHost()
1781 {
1782         if (ServerInstance->Config->HideWhoisServer.empty())
1783                 return ServerInstance->Config->HideWhoisServer;
1784         return nick;
1785 }
1786
1787 const std::string FakeUser::GetFullRealHost()
1788 {
1789         if (!ServerInstance->Config->HideWhoisServer.empty())
1790                 return ServerInstance->Config->HideWhoisServer;
1791         return nick;
1792 }
1793
1794 ConnectClass::ConnectClass(char t, const std::string& mask)
1795         : type(t), name("unnamed"), registration_timeout(0), host(mask),
1796         pingtime(0), pass(""), hash(""), softsendqmax(0), hardsendqmax(0),
1797         recvqmax(0), maxlocal(0), maxglobal(0), maxchans(0), port(0), limit(0)
1798 {
1799 }
1800
1801 ConnectClass::ConnectClass(char t, const std::string& mask, const ConnectClass& parent)
1802         : type(t), name("unnamed"),
1803         registration_timeout(parent.registration_timeout), host(mask),
1804         pingtime(parent.pingtime), pass(parent.pass), hash(parent.hash),
1805         softsendqmax(parent.softsendqmax), hardsendqmax(parent.hardsendqmax),
1806         recvqmax(parent.recvqmax), maxlocal(parent.maxlocal),
1807         maxglobal(parent.maxglobal), maxchans(parent.maxchans),
1808         port(parent.port), limit(parent.limit)
1809 {
1810 }
1811
1812 void ConnectClass::Update(const ConnectClass* src)
1813 {
1814         name = src->name;
1815         registration_timeout = src->registration_timeout;
1816         host = src->host;
1817         pingtime = src->pingtime;
1818         pass = src->pass;
1819         hash = src->hash;
1820         softsendqmax = src->softsendqmax;
1821         hardsendqmax = src->hardsendqmax;
1822         recvqmax = src->recvqmax;
1823         maxlocal = src->maxlocal;
1824         maxglobal = src->maxglobal;
1825         limit = src->limit;
1826 }