src/users.cpp

   1 /*
   2  * InspIRCd -- Internet Relay Chat Daemon
   3  *
   4  *   Copyright (C) 2009-2010 Daniel De Graaf <danieldg@inspircd.org>
   5  *   Copyright (C) 2006-2009 Robin Burchell <robin+git@viroteck.net>
   6  *   Copyright (C) 2006-2007, 2009 Dennis Friis <peavey@inspircd.org>
   7  *   Copyright (C) 2008 John Brooks <john.brooks@dereferenced.net>
   8  *   Copyright (C) 2008 Thomas Stagner <aquanight@inspircd.org>
   9  *   Copyright (C) 2008 Oliver Lupton <oliverlupton@gmail.com>
  10  *   Copyright (C) 2003-2008 Craig Edwards <craigedwards@brainbox.cc>
  11  *
  12  * This file is part of InspIRCd.  InspIRCd is free software: you can
  13  * redistribute it and/or modify it under the terms of the GNU General Public
  14  * License as published by the Free Software Foundation, version 2.
  15  *
  16  * This program is distributed in the hope that it will be useful, but WITHOUT
  17  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  18  * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
  19  * details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  23  */
  24
  25
  26 #include "inspircd.h"
  27 #include <stdarg.h>
  28 #include "socketengine.h"
  29 #include "xline.h"
  30 #include "bancache.h"
  31 #include "commands/cmd_whowas.h"
  32
  33 already_sent_t LocalUser::already_sent_id = 0;
  34
  35 std::string User::ProcessNoticeMasks(const char *sm)
  36 {
  37         bool adding = true, oldadding = false;
  38         const char *c = sm;
  39         std::string output;
  40
  41         while (c && *c)
  42         {
  43                 switch (*c)
  44                 {
  45                         case '+':
  46                                 adding = true;
  47                         break;
  48                         case '-':
  49                                 adding = false;
  50                         break;
  51                         case '*':
  52                                 for (unsigned char d = 'a'; d <= 'z'; d++)
  53                                 {
  54                                         if (!ServerInstance->SNO->masks[d - 'a'].Description.empty())
  55                                         {
  56                                                 if ((!IsNoticeMaskSet(d) && adding) || (IsNoticeMaskSet(d) && !adding))
  57                                                 {
  58                                                         if ((oldadding != adding) || (!output.length()))
  59                                                                 output += (adding ? '+' : '-');
  60
  61                                                         this->SetNoticeMask(d, adding);
  62
  63                                                         output += d;
  64                                                 }
  65                                                 oldadding = adding;
  66                                                 char u = toupper(d);
  67                                                 if ((!IsNoticeMaskSet(u) && adding) || (IsNoticeMaskSet(u) && !adding))
  68                                                 {
  69                                                         if ((oldadding != adding) || (!output.length()))
  70                                                                 output += (adding ? '+' : '-');
  71
  72                                                         this->SetNoticeMask(u, adding);
  73
  74                                                         output += u;
  75                                                 }
  76                                                 oldadding = adding;
  77                                         }
  78                                 }
  79                         break;
  80                         default:
  81                                 if (isalpha(*c))
  82                                 {
  83                                         if ((!IsNoticeMaskSet(*c) && adding) || (IsNoticeMaskSet(*c) && !adding))
  84                                         {
  85                                                 if ((oldadding != adding) || (!output.length()))
  86                                                         output += (adding ? '+' : '-');
  87
  88                                                 this->SetNoticeMask(*c, adding);
  89
  90                                                 output += *c;
  91                                         }
  92                                 }
  93                                 else
  94                                         this->WriteNumeric(ERR_UNKNOWNSNOMASK, "%s %c :is unknown snomask char to me", this->nick.c_str(), *c);
  95
  96                                 oldadding = adding;
  97                         break;
  98                 }
  99
 100                 c++;
 101         }
 102
 103         std::string s = this->FormatNoticeMasks();
 104         if (s.length() == 0)
 105         {
 106                 this->modes[UM_SNOMASK] = false;
 107         }
 108
 109         return output;
 110 }
 111
 112 void LocalUser::StartDNSLookup()
 113 {
 114         try
 115         {
 116                 bool cached = false;
 117                 const char* sip = this->GetIPString();
 118                 UserResolver *res_reverse;
 119
 120                 QueryType resolvtype = this->client_sa.sa.sa_family == AF_INET6 ? DNS_QUERY_PTR6 : DNS_QUERY_PTR4;
 121                 res_reverse = new UserResolver(this, sip, resolvtype, cached);
 122
 123                 ServerInstance->AddResolver(res_reverse, cached);
 124         }
 125         catch (CoreException& e)
 126         {
 127                 ServerInstance->Logs->Log("USERS", DEBUG,"Error in resolver: %s",e.GetReason());
 128                 dns_done = true;
 129                 ServerInstance->stats->statsDnsBad++;
 130         }
 131 }
 132
 133 bool User::IsNoticeMaskSet(unsigned char sm)
 134 {
 135         if (!isalpha(sm))
 136                 return false;
 137         return (snomasks[sm-65]);
 138 }
 139
 140 void User::SetNoticeMask(unsigned char sm, bool value)
 141 {
 142         if (!isalpha(sm))
 143                 return;
 144         snomasks[sm-65] = value;
 145 }
 146
 147 const char* User::FormatNoticeMasks()
 148 {
 149         static char data[MAXBUF];
 150         int offset = 0;
 151
 152         for (int n = 0; n < 64; n++)
 153         {
 154                 if (snomasks[n])
 155                         data[offset++] = n+65;
 156         }
 157
 158         data[offset] = 0;
 159         return data;
 160 }
 161
 162 bool User::IsModeSet(unsigned char m)
 163 {
 164         if (!isalpha(m))
 165                 return false;
 166         return (modes[m-65]);
 167 }
 168
 169 void User::SetMode(unsigned char m, bool value)
 170 {
 171         if (!isalpha(m))
 172                 return;
 173         modes[m-65] = value;
 174 }
 175
 176 const char* User::FormatModes(bool showparameters)
 177 {
 178         static char data[MAXBUF];
 179         std::string params;
 180         int offset = 0;
 181
 182         for (unsigned char n = 0; n < 64; n++)
 183         {
 184                 if (modes[n])
 185                 {
 186                         data[offset++] = n + 65;
 187                         ModeHandler* mh = ServerInstance->Modes->FindMode(n + 65, MODETYPE_USER);
 188                         if (showparameters && mh && mh->GetNumParams(true))
 189                         {
 190                                 std::string p = mh->GetUserParameter(this);
 191                                 if (p.length())
 192                                         params.append(" ").append(p);
 193                         }
 194                 }
 195         }
 196         data[offset] = 0;
 197         strlcat(data, params.c_str(), MAXBUF);
 198         return data;
 199 }
 200
 201 User::User(const std::string &uid, const std::string& sid, int type)
 202         : uuid(uid), server(sid), usertype(type)
 203 {
 204         age = ServerInstance->Time();
 205         signon = idle_lastmsg = 0;
 206         registered = 0;
 207         quietquit = quitting = exempt = dns_done = false;
 208         quitting_sendq = false;
 209         client_sa.sa.sa_family = AF_UNSPEC;
 210
 211         ServerInstance->Logs->Log("USERS", DEBUG, "New UUID for user: %s", uuid.c_str());
 212
 213         user_hash::iterator finduuid = ServerInstance->Users->uuidlist->find(uuid);
 214         if (finduuid == ServerInstance->Users->uuidlist->end())
 215                 (*ServerInstance->Users->uuidlist)[uuid] = this;
 216         else
 217                 throw CoreException("Duplicate UUID "+std::string(uuid)+" in User constructor");
 218 }
 219
 220 LocalUser::LocalUser(int myfd, irc::sockets::sockaddrs* client, irc::sockets::sockaddrs* servaddr)
 221         : User(ServerInstance->GetUID(), ServerInstance->Config->ServerName, USERTYPE_LOCAL), eh(this),
 222         bytes_in(0), bytes_out(0), cmds_in(0), cmds_out(0), nping(0), CommandFloodPenalty(0),
 223         already_sent(0)
 224 {
 225         lastping = 0;
 226         eh.SetFd(myfd);
 227         memcpy(&client_sa, client, sizeof(irc::sockets::sockaddrs));
 228         memcpy(&server_sa, servaddr, sizeof(irc::sockets::sockaddrs));
 229 }
 230
 231 User::~User()
 232 {
 233         if (ServerInstance->Users->uuidlist->find(uuid) != ServerInstance->Users->uuidlist->end())
 234                 ServerInstance->Logs->Log("USERS", DEFAULT, "User destructor for %s called without cull", uuid.c_str());
 235 }
 236
 237 const std::string& User::MakeHost()
 238 {
 239         if (!this->cached_makehost.empty())
 240                 return this->cached_makehost;
 241
 242         char nhost[MAXBUF];
 243         /* This is much faster than snprintf */
 244         char* t = nhost;
 245         for(const char* n = ident.c_str(); *n; n++)
 246                 *t++ = *n;
 247         *t++ = '@';
 248         for(const char* n = host.c_str(); *n; n++)
 249                 *t++ = *n;
 250         *t = 0;
 251
 252         this->cached_makehost.assign(nhost);
 253
 254         return this->cached_makehost;
 255 }
 256
 257 const std::string& User::MakeHostIP()
 258 {
 259         if (!this->cached_hostip.empty())
 260                 return this->cached_hostip;
 261
 262         char ihost[MAXBUF];
 263         /* This is much faster than snprintf */
 264         char* t = ihost;
 265         for(const char* n = ident.c_str(); *n; n++)
 266                 *t++ = *n;
 267         *t++ = '@';
 268         for(const char* n = this->GetIPString(); *n; n++)
 269                 *t++ = *n;
 270         *t = 0;
 271
 272         this->cached_hostip = ihost;
 273
 274         return this->cached_hostip;
 275 }
 276
 277 const std::string& User::GetFullHost()
 278 {
 279         if (!this->cached_fullhost.empty())
 280                 return this->cached_fullhost;
 281
 282         char result[MAXBUF];
 283         char* t = result;
 284         for(const char* n = nick.c_str(); *n; n++)
 285                 *t++ = *n;
 286         *t++ = '!';
 287         for(const char* n = ident.c_str(); *n; n++)
 288                 *t++ = *n;
 289         *t++ = '@';
 290         for(const char* n = dhost.c_str(); *n; n++)
 291                 *t++ = *n;
 292         *t = 0;
 293
 294         this->cached_fullhost = result;
 295
 296         return this->cached_fullhost;
 297 }
 298
 299 char* User::MakeWildHost()
 300 {
 301         static char nresult[MAXBUF];
 302         char* t = nresult;
 303         *t++ = '*';     *t++ = '!';
 304         *t++ = '*';     *t++ = '@';
 305         for(const char* n = dhost.c_str(); *n; n++)
 306                 *t++ = *n;
 307         *t = 0;
 308         return nresult;
 309 }
 310
 311 const std::string& User::GetFullRealHost()
 312 {
 313         if (!this->cached_fullrealhost.empty())
 314                 return this->cached_fullrealhost;
 315
 316         char fresult[MAXBUF];
 317         char* t = fresult;
 318         for(const char* n = nick.c_str(); *n; n++)
 319                 *t++ = *n;
 320         *t++ = '!';
 321         for(const char* n = ident.c_str(); *n; n++)
 322                 *t++ = *n;
 323         *t++ = '@';
 324         for(const char* n = host.c_str(); *n; n++)
 325                 *t++ = *n;
 326         *t = 0;
 327
 328         this->cached_fullrealhost = fresult;
 329
 330         return this->cached_fullrealhost;
 331 }
 332
 333 bool LocalUser::IsInvited(const irc::string &channel)
 334 {
 335         time_t now = ServerInstance->Time();
 336         InvitedList::iterator safei;
 337         for (InvitedList::iterator i = invites.begin(); i != invites.end(); ++i)
 338         {
 339                 if (channel == i->first)
 340                 {
 341                         if (i->second != 0 && now > i->second)
 342                         {
 343                                 /* Expired invite, remove it. */
 344                                 safei = i;
 345                                 --i;
 346                                 invites.erase(safei);
 347                                 continue;
 348                         }
 349                         return true;
 350                 }
 351         }
 352         return false;
 353 }
 354
 355 InvitedList* LocalUser::GetInviteList()
 356 {
 357         time_t now = ServerInstance->Time();
 358         /* Weed out expired invites here. */
 359         InvitedList::iterator safei;
 360         for (InvitedList::iterator i = invites.begin(); i != invites.end(); ++i)
 361         {
 362                 if (i->second != 0 && now > i->second)
 363                 {
 364                         /* Expired invite, remove it. */
 365                         safei = i;
 366                         --i;
 367                         invites.erase(safei);
 368                 }
 369         }
 370         return &invites;
 371 }
 372
 373 void LocalUser::InviteTo(const irc::string &channel, time_t invtimeout)
 374 {
 375         time_t now = ServerInstance->Time();
 376         if (invtimeout != 0 && now > invtimeout) return; /* Don't add invites that are expired from the get-go. */
 377         for (InvitedList::iterator i = invites.begin(); i != invites.end(); ++i)
 378         {
 379                 if (channel == i->first)
 380                 {
 381                         if (i->second != 0 && invtimeout > i->second)
 382                         {
 383                                 i->second = invtimeout;
 384                         }
 385
 386                         return;
 387                 }
 388         }
 389         invites.push_back(std::make_pair(channel, invtimeout));
 390 }
 391
 392 void LocalUser::RemoveInvite(const irc::string &channel)
 393 {
 394         for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
 395         {
 396                 if (channel == i->first)
 397                 {
 398                         invites.erase(i);
 399                         return;
 400                 }
 401         }
 402 }
 403
 404 bool User::HasModePermission(unsigned char, ModeType)
 405 {
 406         return true;
 407 }
 408
 409 bool LocalUser::HasModePermission(unsigned char mode, ModeType type)
 410 {
 411         if (!IS_OPER(this))
 412                 return false;
 413
 414         if (mode < 'A' || mode > ('A' + 64)) return false;
 415
 416         return ((type == MODETYPE_USER ? oper->AllowedUserModes : oper->AllowedChanModes))[(mode - 'A')];
 417
 418 }
 419 /*
 420  * users on remote servers can completely bypass all permissions based checks.
 421  * This prevents desyncs when one server has different type/class tags to another.
 422  * That having been said, this does open things up to the possibility of source changes
 423  * allowing remote kills, etc - but if they have access to the src, they most likely have
 424  * access to the conf - so it's an end to a means either way.
 425  */
 426 bool User::HasPermission(const std::string&)
 427 {
 428         return true;
 429 }
 430
 431 bool LocalUser::HasPermission(const std::string &command)
 432 {
 433         // are they even an oper at all?
 434         if (!IS_OPER(this))
 435         {
 436                 return false;
 437         }
 438
 439         if (oper->AllowedOperCommands.find(command) != oper->AllowedOperCommands.end())
 440                 return true;
 441         else if (oper->AllowedOperCommands.find("*") != oper->AllowedOperCommands.end())
 442                 return true;
 443
 444         return false;
 445 }
 446
 447 bool User::HasPrivPermission(const std::string &privstr, bool noisy)
 448 {
 449         return true;
 450 }
 451
 452 bool LocalUser::HasPrivPermission(const std::string &privstr, bool noisy)
 453 {
 454         if (!IS_OPER(this))
 455         {
 456                 if (noisy)
 457                         this->WriteServ("NOTICE %s :You are not an oper", this->nick.c_str());
 458                 return false;
 459         }
 460
 461         if (oper->AllowedPrivs.find(privstr) != oper->AllowedPrivs.end())
 462         {
 463                 return true;
 464         }
 465         else if (oper->AllowedPrivs.find("*") != oper->AllowedPrivs.end())
 466         {
 467                 return true;
 468         }
 469
 470         if (noisy)
 471                 this->WriteServ("NOTICE %s :Oper type %s does not have access to priv %s", this->nick.c_str(), oper->NameStr(), privstr.c_str());
 472         return false;
 473 }
 474
 475 void UserIOHandler::OnDataReady()
 476 {
 477         if (user->quitting)
 478                 return;
 479
 480         if (recvq.length() > user->MyClass->GetRecvqMax() && !user->HasPrivPermission("users/flood/increased-buffers"))
 481         {
 482                 ServerInstance->Users->QuitUser(user, "RecvQ exceeded");
 483                 ServerInstance->SNO->WriteToSnoMask('a', "User %s RecvQ of %lu exceeds connect class maximum of %lu",
 484                         user->nick.c_str(), (unsigned long)recvq.length(), user->MyClass->GetRecvqMax());
 485         }
 486         unsigned long sendqmax = ULONG_MAX;
 487         if (!user->HasPrivPermission("users/flood/increased-buffers"))
 488                 sendqmax = user->MyClass->GetSendqSoftMax();
 489         unsigned long penaltymax = ULONG_MAX;
 490         if (!user->HasPrivPermission("users/flood/no-fakelag"))
 491                 penaltymax = user->MyClass->GetPenaltyThreshold() * 1000;
 492
 493         while (user->CommandFloodPenalty < penaltymax && getSendQSize() < sendqmax)
 494         {
 495                 std::string line;
 496                 line.reserve(MAXBUF);
 497                 std::string::size_type qpos = 0;
 498                 while (qpos < recvq.length())
 499                 {
 500                         char c = recvq[qpos++];
 501                         switch (c)
 502                         {
 503                         case '\0':
 504                                 c = ' ';
 505                                 break;
 506                         case '\r':
 507                                 continue;
 508                         case '\n':
 509                                 goto eol_found;
 510                         }
 511                         if (line.length() < MAXBUF - 2)
 512                                 line.push_back(c);
 513                 }
 514                 // if we got here, the recvq ran out before we found a newline
 515                 return;
 516 eol_found:
 517                 // just found a newline. Terminate the string, and pull it out of recvq
 518                 recvq = recvq.substr(qpos);
 519
 520                 // TODO should this be moved to when it was inserted in recvq?
 521                 ServerInstance->stats->statsRecv += qpos;
 522                 user->bytes_in += qpos;
 523                 user->cmds_in++;
 524
 525                 ServerInstance->Parser->ProcessBuffer(line, user);
 526                 if (user->quitting)
 527                         return;
 528         }
 529         if (user->CommandFloodPenalty >= penaltymax && !user->MyClass->fakelag)
 530                 ServerInstance->Users->QuitUser(user, "Excess Flood");
 531 }
 532
 533 void UserIOHandler::AddWriteBuf(const std::string &data)
 534 {
 535         if (user->quitting_sendq)
 536                 return;
 537         if (!user->quitting && getSendQSize() + data.length() > user->MyClass->GetSendqHardMax() &&
 538                 !user->HasPrivPermission("users/flood/increased-buffers"))
 539         {
 540                 user->quitting_sendq = true;
 541                 ServerInstance->GlobalCulls.AddSQItem(user);
 542                 return;
 543         }
 544
 545         // We still want to append data to the sendq of a quitting user,
 546         // e.g. their ERROR message that says 'closing link'
 547
 548         WriteData(data);
 549 }
 550
 551 void UserIOHandler::OnError(BufferedSocketError)
 552 {
 553         ServerInstance->Users->QuitUser(user, getError());
 554 }
 555
 556 CullResult User::cull()
 557 {
 558         if (!quitting)
 559                 ServerInstance->Users->QuitUser(this, "Culled without QuitUser");
 560         PurgeEmptyChannels();
 561
 562         this->InvalidateCache();
 563
 564         if (client_sa.sa.sa_family != AF_UNSPEC)
 565                 ServerInstance->Users->RemoveCloneCounts(this);
 566
 567         return Extensible::cull();
 568 }
 569
 570 CullResult LocalUser::cull()
 571 {
 572         std::vector<LocalUser*>::iterator x = find(ServerInstance->Users->local_users.begin(),ServerInstance->Users->local_users.end(),this);
 573         if (x != ServerInstance->Users->local_users.end())
 574                 ServerInstance->Users->local_users.erase(x);
 575         else
 576                 ServerInstance->Logs->Log("USERS", DEBUG, "Failed to remove user from vector");
 577
 578         eh.cull();
 579         return User::cull();
 580 }
 581
 582 CullResult FakeUser::cull()
 583 {
 584         // Fake users don't quit, they just get culled.
 585         quitting = true;
 586         ServerInstance->Users->clientlist->erase(nick);
 587         ServerInstance->Users->uuidlist->erase(uuid);
 588         return User::cull();
 589 }
 590
 591 void User::Oper(OperInfo* info)
 592 {
 593         if (this->IsModeSet('o'))
 594                 this->UnOper();
 595
 596         this->modes[UM_OPERATOR] = 1;
 597         this->oper = info;
 598         this->WriteServ("MODE %s :+o", this->nick.c_str());
 599         FOREACH_MOD(I_OnOper, OnOper(this, info->name));
 600
 601         std::string opername;
 602         if (info->oper_block)
 603                 opername = info->oper_block->getString("name");
 604
 605         if (IS_LOCAL(this))
 606         {
 607                 LocalUser* l = IS_LOCAL(this);
 608                 std::string vhost = oper->getConfig("vhost");
 609                 if (!vhost.empty())
 610                         l->ChangeDisplayedHost(vhost.c_str());
 611                 std::string opClass = oper->getConfig("class");
 612                 if (!opClass.empty())
 613                         l->SetClass(opClass);
 614         }
 615
 616         ServerInstance->SNO->WriteToSnoMask('o',"%s (%s@%s) is now an IRC operator of type %s (using oper '%s')",
 617                 nick.c_str(), ident.c_str(), host.c_str(), oper->NameStr(), opername.c_str());
 618         this->WriteNumeric(381, "%s :You are now %s %s", nick.c_str(), strchr("aeiouAEIOU", oper->name[0]) ? "an" : "a", oper->NameStr());
 619
 620         ServerInstance->Logs->Log("OPER", DEFAULT, "%s!%s@%s opered as type: %s", this->nick.c_str(), this->ident.c_str(), this->host.c_str(), oper->NameStr());
 621         ServerInstance->Users->all_opers.push_back(this);
 622
 623         // Expand permissions from config for faster lookup
 624         if (IS_LOCAL(this))
 625                 oper->init();
 626
 627         FOREACH_MOD(I_OnPostOper,OnPostOper(this, oper->name, opername));
 628 }
 629
 630 void OperInfo::init()
 631 {
 632         AllowedOperCommands.clear();
 633         AllowedPrivs.clear();
 634         AllowedUserModes.reset();
 635         AllowedChanModes.reset();
 636         AllowedUserModes['o' - 'A'] = true; // Call me paranoid if you want.
 637
 638         for(std::vector<reference<ConfigTag> >::iterator iter = class_blocks.begin(); iter != class_blocks.end(); ++iter)
 639         {
 640                 ConfigTag* tag = *iter;
 641                 std::string mycmd, mypriv;
 642                 /* Process commands */
 643                 irc::spacesepstream CommandList(tag->getString("commands"));
 644                 while (CommandList.GetToken(mycmd))
 645                 {
 646                         AllowedOperCommands.insert(mycmd);
 647                 }
 648
 649                 irc::spacesepstream PrivList(tag->getString("privs"));
 650                 while (PrivList.GetToken(mypriv))
 651                 {
 652                         AllowedPrivs.insert(mypriv);
 653                 }
 654
 655                 for (unsigned char* c = (unsigned char*)tag->getString("usermodes").c_str(); *c; ++c)
 656                 {
 657                         if (*c == '*')
 658                         {
 659                                 this->AllowedUserModes.set();
 660                         }
 661                         else if (*c >= 'A' && *c < 'z')
 662                         {
 663                                 this->AllowedUserModes[*c - 'A'] = true;
 664                         }
 665                 }
 666
 667                 for (unsigned char* c = (unsigned char*)tag->getString("chanmodes").c_str(); *c; ++c)
 668                 {
 669                         if (*c == '*')
 670                         {
 671                                 this->AllowedChanModes.set();
 672                         }
 673                         else if (*c >= 'A' && *c < 'z')
 674                         {
 675                                 this->AllowedChanModes[*c - 'A'] = true;
 676                         }
 677                 }
 678         }
 679 }
 680
 681 void User::UnOper()
 682 {
 683         if (!IS_OPER(this))
 684                 return;
 685
 686         /*
 687          * unset their oper type (what IS_OPER checks).
 688          * note, order is important - this must come before modes as -o attempts
 689          * to call UnOper. -- w00t
 690          */
 691         oper = NULL;
 692
 693
 694         /* Remove all oper only modes from the user when the deoper - Bug #466*/
 695         std::string moderemove("-");
 696
 697         for (unsigned char letter = 'A'; letter <= 'z'; letter++)
 698         {
 699                 ModeHandler* mh = ServerInstance->Modes->FindMode(letter, MODETYPE_USER);
 700                 if (mh && mh->NeedsOper())
 701                         moderemove += letter;
 702         }
 703
 704
 705         std::vector<std::string> parameters;
 706         parameters.push_back(this->nick);
 707         parameters.push_back(moderemove);
 708
 709         ServerInstance->Parser->CallHandler("MODE", parameters, this);
 710
 711         /* remove the user from the oper list. Will remove multiple entries as a safeguard against bug #404 */
 712         ServerInstance->Users->all_opers.remove(this);
 713
 714         this->modes[UM_OPERATOR] = 0;
 715 }
 716
 717 /* adds or updates an entry in the whowas list */
 718 void User::AddToWhoWas()
 719 {
 720         Module* whowas = ServerInstance->Modules->Find("cmd_whowas.so");
 721         if (whowas)
 722         {
 723                 WhowasRequest req(NULL, whowas, WhowasRequest::WHOWAS_ADD);
 724                 req.user = this;
 725                 req.Send();
 726         }
 727 }
 728
 729 /*
 730  * Check class restrictions
 731  */
 732 void LocalUser::CheckClass()
 733 {
 734         ConnectClass* a = this->MyClass;
 735
 736         if (!a)
 737         {
 738                 ServerInstance->Users->QuitUser(this, "Access denied by configuration");
 739                 return;
 740         }
 741         else if (a->type == CC_DENY)
 742         {
 743                 ServerInstance->Users->QuitUser(this, a->config->getString("reason", "Unauthorised connection"));
 744                 return;
 745         }
 746         else if ((a->GetMaxLocal()) && (ServerInstance->Users->LocalCloneCount(this) > a->GetMaxLocal()))
 747         {
 748                 ServerInstance->Users->QuitUser(this, "No more connections allowed from your host via this connect class (local)");
 749                 if (a->maxconnwarn)
 750                         ServerInstance->SNO->WriteToSnoMask('a', "WARNING: maximum LOCAL connections (%ld) exceeded for IP %s", a->GetMaxLocal(), this->GetIPString());
 751                 return;
 752         }
 753         else if ((a->GetMaxGlobal()) && (ServerInstance->Users->GlobalCloneCount(this) > a->GetMaxGlobal()))
 754         {
 755                 ServerInstance->Users->QuitUser(this, "No more connections allowed from your host via this connect class (global)");
 756                 if (a->maxconnwarn)
 757                         ServerInstance->SNO->WriteToSnoMask('a', "WARNING: maximum GLOBAL connections (%ld) exceeded for IP %s", a->GetMaxGlobal(), this->GetIPString());
 758                 return;
 759         }
 760
 761         this->nping = ServerInstance->Time() + a->GetPingTime() + ServerInstance->Config->dns_timeout;
 762 }
 763
 764 bool User::CheckLines(bool doZline)
 765 {
 766         const char* check[] = { "G" , "K", (doZline) ? "Z" : NULL, NULL };
 767
 768         if (!this->exempt)
 769         {
 770                 for (int n = 0; check[n]; ++n)
 771                 {
 772                         XLine *r = ServerInstance->XLines->MatchesLine(check[n], this);
 773
 774                         if (r)
 775                         {
 776                                 r->Apply(this);
 777                                 return true;
 778                         }
 779                 }
 780         }
 781
 782         return false;
 783 }
 784
 785 void LocalUser::FullConnect()
 786 {
 787         ServerInstance->stats->statsConnects++;
 788         this->idle_lastmsg = ServerInstance->Time();
 789
 790         /*
 791          * You may be thinking "wtf, we checked this in User::AddClient!" - and yes, we did, BUT.
 792          * At the time AddClient is called, we don't have a resolved host, by here we probably do - which
 793          * may put the user into a totally seperate class with different restrictions! so we *must* check again.
 794          * Don't remove this! -- w00t
 795          */
 796         MyClass = NULL;
 797         SetClass();
 798         CheckClass();
 799         CheckLines();
 800
 801         if (quitting)
 802                 return;
 803
 804         this->WriteServ("NOTICE Auth :Welcome to \002%s\002!",ServerInstance->Config->Network.c_str());
 805         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());
 806         this->WriteNumeric(RPL_YOURHOSTIS, "%s :Your host is %s, running version InspIRCd-2.0",this->nick.c_str(),ServerInstance->Config->ServerName.c_str());
 807         this->WriteNumeric(RPL_SERVERCREATED, "%s :This server was created %s %s", this->nick.c_str(), __TIME__, __DATE__);
 808         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());
 809
 810         ServerInstance->Config->Send005(this);
 811         this->WriteNumeric(RPL_YOURUUID, "%s %s :your unique ID", this->nick.c_str(), this->uuid.c_str());
 812
 813         /* Now registered */
 814         if (ServerInstance->Users->unregistered_count)
 815                 ServerInstance->Users->unregistered_count--;
 816
 817         /* Trigger MOTD and LUSERS output, give modules a chance too */
 818         ModResult MOD_RESULT;
 819         std::string command("MOTD");
 820         std::vector<std::string> parameters;
 821         FIRST_MOD_RESULT(OnPreCommand, MOD_RESULT, (command, parameters, this, true, command));
 822         if (!MOD_RESULT)
 823                 ServerInstance->CallCommandHandler(command, parameters, this);
 824
 825         MOD_RESULT = MOD_RES_PASSTHRU;
 826         command = "LUSERS";
 827         FIRST_MOD_RESULT(OnPreCommand, MOD_RESULT, (command, parameters, this, true, command));
 828         if (!MOD_RESULT)
 829                 ServerInstance->CallCommandHandler(command, parameters, this);
 830
 831         if (ServerInstance->Config->RawLog)
 832                 WriteServ("PRIVMSG %s :*** Raw I/O logging is enabled on this server. All messages, passwords, and commands are being recorded.", nick.c_str());
 833
 834         /*
 835          * We don't set REG_ALL until triggering OnUserConnect, so some module events don't spew out stuff
 836          * for a user that doesn't exist yet.
 837          */
 838         FOREACH_MOD(I_OnUserConnect,OnUserConnect(this));
 839
 840         this->registered = REG_ALL;
 841
 842         FOREACH_MOD(I_OnPostConnect,OnPostConnect(this));
 843
 844         ServerInstance->SNO->WriteToSnoMask('c',"Client connecting on port %d (class %s): %s!%s@%s [%s] [%s]",
 845                 this->GetServerPort(), this->MyClass->name.c_str(), this->nick.c_str(), this->ident.c_str(), this->host.c_str(), this->GetIPString(), this->fullname.c_str());
 846         ServerInstance->Logs->Log("BANCACHE", DEBUG, "BanCache: Adding NEGATIVE hit for %s", this->GetIPString());
 847         ServerInstance->BanCache->AddHit(this->GetIPString(), "", "");
 848         // reset the flood penalty (which could have been raised due to things like auto +x)
 849         CommandFloodPenalty = 0;
 850 }
 851
 852 void User::InvalidateCache()
 853 {
 854         /* Invalidate cache */
 855         cached_fullhost.clear();
 856         cached_hostip.clear();
 857         cached_makehost.clear();
 858         cached_fullrealhost.clear();
 859 }
 860
 861 bool User::ChangeNick(const std::string& newnick, bool force)
 862 {
 863         ModResult MOD_RESULT;
 864
 865         if (force)
 866                 ServerInstance->NICKForced.set(this, 1);
 867         FIRST_MOD_RESULT(OnUserPreNick, MOD_RESULT, (this, newnick));
 868         ServerInstance->NICKForced.set(this, 0);
 869
 870         if (MOD_RESULT == MOD_RES_DENY)
 871         {
 872                 ServerInstance->stats->statsCollisions++;
 873                 return false;
 874         }
 875
 876         if (assign(newnick) == assign(nick))
 877         {
 878                 // case change, don't need to check Q:lines and such
 879                 // and, if it's identical including case, we can leave right now
 880                 if (newnick == nick)
 881                         return true;
 882         }
 883         else
 884         {
 885                 /*
 886                  * Don't check Q:Lines if it's a server-enforced change, just on the off-chance some fucking *moron*
 887                  * tries to Q:Line SIDs, also, this means we just get our way period, as it really should be.
 888                  * Thanks Kein for finding this. -- w00t
 889                  *
 890                  * Also don't check Q:Lines for remote nickchanges, they should have our Q:Lines anyway to enforce themselves.
 891                  *              -- w00t
 892                  */
 893                 if (IS_LOCAL(this) && !force)
 894                 {
 895                         XLine* mq = ServerInstance->XLines->MatchesLine("Q",newnick);
 896                         if (mq)
 897                         {
 898                                 if (this->registered == REG_ALL)
 899                                 {
 900                                         ServerInstance->SNO->WriteGlobalSno('a', "Q-Lined nickname %s from %s!%s@%s: %s",
 901                                                 newnick.c_str(), this->nick.c_str(), this->ident.c_str(), this->host.c_str(), mq->reason.c_str());
 902                                 }
 903                                 this->WriteNumeric(432, "%s %s :Invalid nickname: %s",this->nick.c_str(), newnick.c_str(), mq->reason.c_str());
 904                                 return false;
 905                         }
 906
 907                         if (ServerInstance->Config->RestrictBannedUsers)
 908                         {
 909                                 for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
 910                                 {
 911                                         Channel *chan = *i;
 912                                         if (chan->GetPrefixValue(this) < VOICE_VALUE && chan->IsBanned(this))
 913                                         {
 914                                                 this->WriteNumeric(404, "%s %s :Cannot send to channel (you're banned)", this->nick.c_str(), chan->name.c_str());
 915                                                 return false;
 916                                         }
 917                                 }
 918                         }
 919                 }
 920
 921                 /*
 922                  * Uh oh.. if the nickname is in use, and it's not in use by the person using it (doh) --
 923                  * then we have a potential collide. Check whether someone else is camping on the nick
 924                  * (i.e. connect -> send NICK, don't send USER.) If they are camping, force-change the
 925                  * camper to their UID, and allow the incoming nick change.
 926                  *
 927                  * If the guy using the nick is already using it, tell the incoming nick change to gtfo,
 928                  * because the nick is already (rightfully) in use. -- w00t
 929                  */
 930                 User* InUse = ServerInstance->FindNickOnly(newnick);
 931                 if (InUse && (InUse != this))
 932                 {
 933                         if (InUse->registered != REG_ALL)
 934                         {
 935                                 /* force the camper to their UUID, and ask them to re-send a NICK. */
 936                                 InUse->WriteTo(InUse, "NICK %s", InUse->uuid.c_str());
 937                                 InUse->WriteNumeric(433, "%s %s :Nickname overruled.", InUse->nick.c_str(), InUse->nick.c_str());
 938
 939                                 ServerInstance->Users->clientlist->erase(InUse->nick);
 940                                 (*(ServerInstance->Users->clientlist))[InUse->uuid] = InUse;
 941
 942                                 InUse->nick = InUse->uuid;
 943                                 InUse->InvalidateCache();
 944                                 InUse->registered &= ~REG_NICK;
 945                         }
 946                         else
 947                         {
 948                                 /* No camping, tell the incoming user  to stop trying to change nick ;p */
 949                                 this->WriteNumeric(433, "%s %s :Nickname is already in use.", this->registered >= REG_NICK ? this->nick.c_str() : "*", newnick.c_str());
 950                                 return false;
 951                         }
 952                 }
 953         }
 954
 955         if (this->registered == REG_ALL)
 956                 this->WriteCommon("NICK %s",newnick.c_str());
 957         std::string oldnick = nick;
 958         nick = newnick;
 959
 960         InvalidateCache();
 961         ServerInstance->Users->clientlist->erase(oldnick);
 962         (*(ServerInstance->Users->clientlist))[newnick] = this;
 963
 964         if (registered == REG_ALL)
 965                 FOREACH_MOD(I_OnUserPostNick,OnUserPostNick(this,oldnick));
 966
 967         return true;
 968 }
 969
 970 int LocalUser::GetServerPort()
 971 {
 972         switch (this->server_sa.sa.sa_family)
 973         {
 974                 case AF_INET6:
 975                         return htons(this->server_sa.in6.sin6_port);
 976                 case AF_INET:
 977                         return htons(this->server_sa.in4.sin_port);
 978         }
 979         return 0;
 980 }
 981
 982 const char* User::GetIPString()
 983 {
 984         int port;
 985         if (cachedip.empty())
 986         {
 987                 irc::sockets::satoap(client_sa, cachedip, port);
 988                 /* IP addresses starting with a : on irc are a Bad Thing (tm) */
 989                 if (cachedip.c_str()[0] == ':')
 990                         cachedip.insert(0,1,'0');
 991         }
 992
 993         return cachedip.c_str();
 994 }
 995
 996 irc::sockets::cidr_mask User::GetCIDRMask()
 997 {
 998         int range = 0;
 999         switch (client_sa.sa.sa_family)
1000         {
1001                 case AF_INET6:
1002                         range = ServerInstance->Config->c_ipv6_range;
1003                         break;
1004                 case AF_INET:
1005                         range = ServerInstance->Config->c_ipv4_range;
1006                         break;
1007         }
1008         return irc::sockets::cidr_mask(client_sa, range);
1009 }
1010
1011 bool User::SetClientIP(const char* sip)
1012 {
1013         this->cachedip = "";
1014         return irc::sockets::aptosa(sip, 0, client_sa);
1015 }
1016
1017 static std::string wide_newline("\r\n");
1018
1019 void User::Write(const std::string& text)
1020 {
1021 }
1022
1023 void User::Write(const char *text, ...)
1024 {
1025 }
1026
1027 void LocalUser::Write(const std::string& text)
1028 {
1029         if (!ServerInstance->SE->BoundsCheckFd(&eh))
1030                 return;
1031
1032         if (text.length() > MAXBUF - 2)
1033         {
1034                 // this should happen rarely or never. Crop the string at 512 and try again.
1035                 std::string try_again = text.substr(0, MAXBUF - 2);
1036                 Write(try_again);
1037                 return;
1038         }
1039
1040         ServerInstance->Logs->Log("USEROUTPUT", RAWIO, "C[%s] O %s", uuid.c_str(), text.c_str());
1041
1042         eh.AddWriteBuf(text);
1043         eh.AddWriteBuf(wide_newline);
1044
1045         ServerInstance->stats->statsSent += text.length() + 2;
1046         this->bytes_out += text.length() + 2;
1047         this->cmds_out++;
1048 }
1049
1050 /** Write()
1051  */
1052 void LocalUser::Write(const char *text, ...)
1053 {
1054         va_list argsPtr;
1055         char textbuffer[MAXBUF];
1056
1057         va_start(argsPtr, text);
1058         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1059         va_end(argsPtr);
1060
1061         this->Write(std::string(textbuffer));
1062 }
1063
1064 void User::WriteServ(const std::string& text)
1065 {
1066         this->Write(":%s %s",ServerInstance->Config->ServerName.c_str(),text.c_str());
1067 }
1068
1069 /** WriteServ()
1070  *  Same as Write(), except `text' is prefixed with `:server.name '.
1071  */
1072 void User::WriteServ(const char* text, ...)
1073 {
1074         va_list argsPtr;
1075         char textbuffer[MAXBUF];
1076
1077         va_start(argsPtr, text);
1078         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1079         va_end(argsPtr);
1080
1081         this->WriteServ(std::string(textbuffer));
1082 }
1083
1084
1085 void User::WriteNumeric(unsigned int numeric, const char* text, ...)
1086 {
1087         va_list argsPtr;
1088         char textbuffer[MAXBUF];
1089
1090         va_start(argsPtr, text);
1091         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1092         va_end(argsPtr);
1093
1094         this->WriteNumeric(numeric, std::string(textbuffer));
1095 }
1096
1097 void User::WriteNumeric(unsigned int numeric, const std::string &text)
1098 {
1099         char textbuffer[MAXBUF];
1100         ModResult MOD_RESULT;
1101
1102         FIRST_MOD_RESULT(OnNumeric, MOD_RESULT, (this, numeric, text));
1103
1104         if (MOD_RESULT == MOD_RES_DENY)
1105                 return;
1106
1107         snprintf(textbuffer,MAXBUF,":%s %03u %s",ServerInstance->Config->ServerName.c_str(), numeric, text.c_str());
1108         this->Write(std::string(textbuffer));
1109 }
1110
1111 void User::WriteFrom(User *user, const std::string &text)
1112 {
1113         char tb[MAXBUF];
1114
1115         snprintf(tb,MAXBUF,":%s %s",user->GetFullHost().c_str(),text.c_str());
1116
1117         this->Write(std::string(tb));
1118 }
1119
1120
1121 /* write text from an originating user to originating user */
1122
1123 void User::WriteFrom(User *user, const char* text, ...)
1124 {
1125         va_list argsPtr;
1126         char textbuffer[MAXBUF];
1127
1128         va_start(argsPtr, text);
1129         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1130         va_end(argsPtr);
1131
1132         this->WriteFrom(user, std::string(textbuffer));
1133 }
1134
1135
1136 /* write text to an destination user from a source user (e.g. user privmsg) */
1137
1138 void User::WriteTo(User *dest, const char *data, ...)
1139 {
1140         char textbuffer[MAXBUF];
1141         va_list argsPtr;
1142
1143         va_start(argsPtr, data);
1144         vsnprintf(textbuffer, MAXBUF, data, argsPtr);
1145         va_end(argsPtr);
1146
1147         this->WriteTo(dest, std::string(textbuffer));
1148 }
1149
1150 void User::WriteTo(User *dest, const std::string &data)
1151 {
1152         dest->WriteFrom(this, data);
1153 }
1154
1155 void User::WriteCommon(const char* text, ...)
1156 {
1157         char textbuffer[MAXBUF];
1158         va_list argsPtr;
1159
1160         if (this->registered != REG_ALL || quitting)
1161                 return;
1162
1163         int len = snprintf(textbuffer,MAXBUF,":%s ",this->GetFullHost().c_str());
1164
1165         va_start(argsPtr, text);
1166         vsnprintf(textbuffer + len, MAXBUF - len, text, argsPtr);
1167         va_end(argsPtr);
1168
1169         this->WriteCommonRaw(std::string(textbuffer), true);
1170 }
1171
1172 void User::WriteCommonExcept(const char* text, ...)
1173 {
1174         char textbuffer[MAXBUF];
1175         va_list argsPtr;
1176
1177         if (this->registered != REG_ALL || quitting)
1178                 return;
1179
1180         int len = snprintf(textbuffer,MAXBUF,":%s ",this->GetFullHost().c_str());
1181
1182         va_start(argsPtr, text);
1183         vsnprintf(textbuffer + len, MAXBUF - len, text, argsPtr);
1184         va_end(argsPtr);
1185
1186         this->WriteCommonRaw(std::string(textbuffer), false);
1187 }
1188
1189 void User::WriteCommonRaw(const std::string &line, bool include_self)
1190 {
1191         if (this->registered != REG_ALL || quitting)
1192                 return;
1193
1194         LocalUser::already_sent_id++;
1195
1196         UserChanList include_c(chans);
1197         std::map<User*,bool> exceptions;
1198
1199         exceptions[this] = include_self;
1200
1201         FOREACH_MOD(I_OnBuildNeighborList,OnBuildNeighborList(this, include_c, exceptions));
1202
1203         for (std::map<User*,bool>::iterator i = exceptions.begin(); i != exceptions.end(); ++i)
1204         {
1205                 LocalUser* u = IS_LOCAL(i->first);
1206                 if (u && !u->quitting)
1207                 {
1208                         u->already_sent = LocalUser::already_sent_id;
1209                         if (i->second)
1210                                 u->Write(line);
1211                 }
1212         }
1213         for (UCListIter v = include_c.begin(); v != include_c.end(); ++v)
1214         {
1215                 Channel* c = *v;
1216                 const UserMembList* ulist = c->GetUsers();
1217                 for (UserMembList::const_iterator i = ulist->begin(); i != ulist->end(); i++)
1218                 {
1219                         LocalUser* u = IS_LOCAL(i->first);
1220                         if (u && !u->quitting && u->already_sent != LocalUser::already_sent_id)
1221                         {
1222                                 u->already_sent = LocalUser::already_sent_id;
1223                                 u->Write(line);
1224                         }
1225                 }
1226         }
1227 }
1228
1229 void User::WriteCommonQuit(const std::string &normal_text, const std::string &oper_text)
1230 {
1231         char tb1[MAXBUF];
1232         char tb2[MAXBUF];
1233
1234         if (this->registered != REG_ALL)
1235                 return;
1236
1237         already_sent_t uniq_id = ++LocalUser::already_sent_id;
1238
1239         snprintf(tb1,MAXBUF,":%s QUIT :%s",this->GetFullHost().c_str(),normal_text.c_str());
1240         snprintf(tb2,MAXBUF,":%s QUIT :%s",this->GetFullHost().c_str(),oper_text.c_str());
1241         std::string out1 = tb1;
1242         std::string out2 = tb2;
1243
1244         UserChanList include_c(chans);
1245         std::map<User*,bool> exceptions;
1246
1247         FOREACH_MOD(I_OnBuildNeighborList,OnBuildNeighborList(this, include_c, exceptions));
1248
1249         for (std::map<User*,bool>::iterator i = exceptions.begin(); i != exceptions.end(); ++i)
1250         {
1251                 LocalUser* u = IS_LOCAL(i->first);
1252                 if (u && !u->quitting)
1253                 {
1254                         u->already_sent = uniq_id;
1255                         if (i->second)
1256                                 u->Write(IS_OPER(u) ? out2 : out1);
1257                 }
1258         }
1259         for (UCListIter v = include_c.begin(); v != include_c.end(); ++v)
1260         {
1261                 const UserMembList* ulist = (*v)->GetUsers();
1262                 for (UserMembList::const_iterator i = ulist->begin(); i != ulist->end(); i++)
1263                 {
1264                         LocalUser* u = IS_LOCAL(i->first);
1265                         if (u && !u->quitting && (u->already_sent != uniq_id))
1266                         {
1267                                 u->already_sent = uniq_id;
1268                                 u->Write(IS_OPER(u) ? out2 : out1);
1269                         }
1270                 }
1271         }
1272 }
1273
1274 void LocalUser::SendText(const std::string& line)
1275 {
1276         Write(line);
1277 }
1278
1279 void RemoteUser::SendText(const std::string& line)
1280 {
1281         ServerInstance->PI->PushToClient(this, line);
1282 }
1283
1284 void FakeUser::SendText(const std::string& line)
1285 {
1286 }
1287
1288 void User::SendText(const char *text, ...)
1289 {
1290         va_list argsPtr;
1291         char line[MAXBUF];
1292
1293         va_start(argsPtr, text);
1294         vsnprintf(line, MAXBUF, text, argsPtr);
1295         va_end(argsPtr);
1296
1297         SendText(std::string(line));
1298 }
1299
1300 void User::SendText(const std::string &LinePrefix, std::stringstream &TextStream)
1301 {
1302         char line[MAXBUF];
1303         int start_pos = LinePrefix.length();
1304         int pos = start_pos;
1305         memcpy(line, LinePrefix.data(), pos);
1306         std::string Word;
1307         while (TextStream >> Word)
1308         {
1309                 int len = Word.length();
1310                 if (pos + len + 12 > MAXBUF)
1311                 {
1312                         line[pos] = '\0';
1313                         SendText(std::string(line));
1314                         pos = start_pos;
1315                 }
1316                 line[pos] = ' ';
1317                 memcpy(line + pos + 1, Word.data(), len);
1318                 pos += len + 1;
1319         }
1320         line[pos] = '\0';
1321         SendText(std::string(line));
1322 }
1323
1324 /* return 0 or 1 depending if users u and u2 share one or more common channels
1325  * (used by QUIT, NICK etc which arent channel specific notices)
1326  *
1327  * The old algorithm in 1.0 for this was relatively inefficient, iterating over
1328  * the first users channels then the second users channels within the outer loop,
1329  * therefore it was a maximum of x*y iterations (upon returning 0 and checking
1330  * all possible iterations). However this new function instead checks against the
1331  * channel's userlist in the inner loop which is a std::map<User*,User*>
1332  * and saves us time as we already know what pointer value we are after.
1333  * Don't quote me on the maths as i am not a mathematician or computer scientist,
1334  * but i believe this algorithm is now x+(log y) maximum iterations instead.
1335  */
1336 bool User::SharesChannelWith(User *other)
1337 {
1338         if ((!other) || (this->registered != REG_ALL) || (other->registered != REG_ALL))
1339                 return false;
1340
1341         /* Outer loop */
1342         for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1343         {
1344                 /* Eliminate the inner loop (which used to be ~equal in size to the outer loop)
1345                  * by replacing it with a map::find which *should* be more efficient
1346                  */
1347                 if ((*i)->HasUser(other))
1348                         return true;
1349         }
1350         return false;
1351 }
1352
1353 bool User::ChangeName(const char* gecos)
1354 {
1355         if (!this->fullname.compare(gecos))
1356                 return true;
1357
1358         if (IS_LOCAL(this))
1359         {
1360                 ModResult MOD_RESULT;
1361                 FIRST_MOD_RESULT(OnChangeLocalUserGECOS, MOD_RESULT, (IS_LOCAL(this),gecos));
1362                 if (MOD_RESULT == MOD_RES_DENY)
1363                         return false;
1364                 FOREACH_MOD(I_OnChangeName,OnChangeName(this,gecos));
1365         }
1366         this->fullname.assign(gecos, 0, ServerInstance->Config->Limits.MaxGecos);
1367
1368         return true;
1369 }
1370
1371 void User::DoHostCycle(const std::string &quitline)
1372 {
1373         char buffer[MAXBUF];
1374
1375         if (!ServerInstance->Config->CycleHosts)
1376                 return;
1377
1378         already_sent_t silent_id = ++LocalUser::already_sent_id;
1379         already_sent_t seen_id = ++LocalUser::already_sent_id;
1380
1381         UserChanList include_c(chans);
1382         std::map<User*,bool> exceptions;
1383
1384         FOREACH_MOD(I_OnBuildNeighborList,OnBuildNeighborList(this, include_c, exceptions));
1385
1386         for (std::map<User*,bool>::iterator i = exceptions.begin(); i != exceptions.end(); ++i)
1387         {
1388                 LocalUser* u = IS_LOCAL(i->first);
1389                 if (u && !u->quitting)
1390                 {
1391                         if (i->second)
1392                         {
1393                                 u->already_sent = seen_id;
1394                                 u->Write(quitline);
1395                         }
1396                         else
1397                         {
1398                                 u->already_sent = silent_id;
1399                         }
1400                 }
1401         }
1402         for (UCListIter v = include_c.begin(); v != include_c.end(); ++v)
1403         {
1404                 Channel* c = *v;
1405                 snprintf(buffer, MAXBUF, ":%s JOIN %s", GetFullHost().c_str(), c->name.c_str());
1406                 std::string joinline(buffer);
1407                 Membership* memb = c->GetUser(this);
1408                 std::string modeline = memb->modes;
1409                 if (modeline.length() > 0)
1410                 {
1411                         for(unsigned int i=0; i < memb->modes.length(); i++)
1412                                 modeline.append(" ").append(nick);
1413                         snprintf(buffer, MAXBUF, ":%s MODE %s +%s",
1414                                 ServerInstance->Config->CycleHostsFromUser ? GetFullHost().c_str() : ServerInstance->Config->ServerName.c_str(),
1415                                 c->name.c_str(), modeline.c_str());
1416                         modeline = buffer;
1417                 }
1418
1419                 const UserMembList *ulist = c->GetUsers();
1420                 for (UserMembList::const_iterator i = ulist->begin(); i != ulist->end(); i++)
1421                 {
1422                         LocalUser* u = IS_LOCAL(i->first);
1423                         if (u == NULL || u == this)
1424                                 continue;
1425                         if (u->already_sent == silent_id)
1426                                 continue;
1427
1428                         if (u->already_sent != seen_id)
1429                         {
1430                                 u->Write(quitline);
1431                                 u->already_sent = seen_id;
1432                         }
1433                         u->Write(joinline);
1434                         if (modeline.length() > 0)
1435                                 u->Write(modeline);
1436                 }
1437         }
1438 }
1439
1440 bool User::ChangeDisplayedHost(const char* shost)
1441 {
1442         if (dhost == shost)
1443                 return true;
1444
1445         if (IS_LOCAL(this))
1446         {
1447                 ModResult MOD_RESULT;
1448                 FIRST_MOD_RESULT(OnChangeLocalUserHost, MOD_RESULT, (IS_LOCAL(this),shost));
1449                 if (MOD_RESULT == MOD_RES_DENY)
1450                         return false;
1451         }
1452
1453         FOREACH_MOD(I_OnChangeHost, OnChangeHost(this,shost));
1454
1455         std::string quitstr = ":" + GetFullHost() + " QUIT :Changing host";
1456
1457         /* Fix by Om: User::dhost is 65 long, this was truncating some long hosts */
1458         this->dhost.assign(shost, 0, 64);
1459
1460         this->InvalidateCache();
1461
1462         this->DoHostCycle(quitstr);
1463
1464         if (IS_LOCAL(this))
1465                 this->WriteNumeric(RPL_YOURDISPLAYEDHOST, "%s %s :is now your displayed host",this->nick.c_str(),this->dhost.c_str());
1466
1467         return true;
1468 }
1469
1470 bool User::ChangeIdent(const char* newident)
1471 {
1472         if (this->ident == newident)
1473                 return true;
1474
1475         FOREACH_MOD(I_OnChangeIdent, OnChangeIdent(this,newident));
1476
1477         std::string quitstr = ":" + GetFullHost() + " QUIT :Changing ident";
1478
1479         this->ident.assign(newident, 0, ServerInstance->Config->Limits.IdentMax + 1);
1480
1481         this->InvalidateCache();
1482
1483         this->DoHostCycle(quitstr);
1484
1485         return true;
1486 }
1487
1488 void User::SendAll(const char* command, const char* text, ...)
1489 {
1490         char textbuffer[MAXBUF];
1491         char formatbuffer[MAXBUF];
1492         va_list argsPtr;
1493
1494         va_start(argsPtr, text);
1495         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1496         va_end(argsPtr);
1497
1498         snprintf(formatbuffer,MAXBUF,":%s %s $* :%s", this->GetFullHost().c_str(), command, textbuffer);
1499         std::string fmt = formatbuffer;
1500
1501         for (std::vector<LocalUser*>::const_iterator i = ServerInstance->Users->local_users.begin(); i != ServerInstance->Users->local_users.end(); i++)
1502         {
1503                 (*i)->Write(fmt);
1504         }
1505 }
1506
1507
1508 std::string User::ChannelList(User* source, bool spy)
1509 {
1510         std::string list;
1511
1512         for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1513         {
1514                 Channel* c = *i;
1515                 /* If the target is the sender, neither +p nor +s is set, or
1516                  * the channel contains the user, it is not a spy channel
1517                  */
1518                 if (spy != (source == this || !(c->IsModeSet('p') || c->IsModeSet('s')) || c->HasUser(source)))
1519                         list.append(c->GetPrefixChar(this)).append(c->name).append(" ");
1520         }
1521
1522         return list;
1523 }
1524
1525 void User::SplitChanList(User* dest, const std::string &cl)
1526 {
1527         std::string line;
1528         std::ostringstream prefix;
1529         std::string::size_type start, pos, length;
1530
1531         prefix << this->nick << " " << dest->nick << " :";
1532         line = prefix.str();
1533         int namelen = ServerInstance->Config->ServerName.length() + 6;
1534
1535         for (start = 0; (pos = cl.find(' ', start)) != std::string::npos; start = pos+1)
1536         {
1537                 length = (pos == std::string::npos) ? cl.length() : pos;
1538
1539                 if (line.length() + namelen + length - start > 510)
1540                 {
1541                         ServerInstance->SendWhoisLine(this, dest, 319, "%s", line.c_str());
1542                         line = prefix.str();
1543                 }
1544
1545                 if(pos == std::string::npos)
1546                 {
1547                         line.append(cl.substr(start, length - start));
1548                         break;
1549                 }
1550                 else
1551                 {
1552                         line.append(cl.substr(start, length - start + 1));
1553                 }
1554         }
1555
1556         if (line.length() != prefix.str().length())
1557         {
1558                 ServerInstance->SendWhoisLine(this, dest, 319, "%s", line.c_str());
1559         }
1560 }
1561
1562 /*
1563  * Sets a user's connection class.
1564  * If the class name is provided, it will be used. Otherwise, the class will be guessed using host/ip/ident/etc.
1565  * NOTE: If the <ALLOW> or <DENY> tag specifies an ip, and this user resolves,
1566  * then their ip will be taken as 'priority' anyway, so for example,
1567  * <connect allow="127.0.0.1"> will match joe!bloggs@localhost
1568  */
1569 void LocalUser::SetClass(const std::string &explicit_name)
1570 {
1571         ConnectClass *found = NULL;
1572
1573         ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Setting connect class for UID %s", this->uuid.c_str());
1574
1575         if (!explicit_name.empty())
1576         {
1577                 for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++)
1578                 {
1579                         ConnectClass* c = *i;
1580
1581                         if (explicit_name == c->name)
1582                         {
1583                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Explicitly set to %s", explicit_name.c_str());
1584                                 found = c;
1585                         }
1586                 }
1587         }
1588         else
1589         {
1590                 for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++)
1591                 {
1592                         ConnectClass* c = *i;
1593                         ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Checking %s", c->GetName().c_str());
1594
1595                         ModResult MOD_RESULT;
1596                         FIRST_MOD_RESULT(OnSetConnectClass, MOD_RESULT, (this,c));
1597                         if (MOD_RESULT == MOD_RES_DENY)
1598                                 continue;
1599                         if (MOD_RESULT == MOD_RES_ALLOW)
1600                         {
1601                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Class forced by module to %s", c->GetName().c_str());
1602                                 found = c;
1603                                 break;
1604                         }
1605
1606                         if (c->type == CC_NAMED)
1607                                 continue;
1608
1609                         bool regdone = (registered != REG_NONE);
1610                         if (c->config->getBool("registered", regdone) != regdone)
1611                                 continue;
1612
1613                         /* check if host matches.. */
1614                         if (!InspIRCd::MatchCIDR(this->GetIPString(), c->GetHost(), NULL) &&
1615                             !InspIRCd::MatchCIDR(this->host, c->GetHost(), NULL))
1616                         {
1617                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "No host match (for %s)", c->GetHost().c_str());
1618                                 continue;
1619                         }
1620
1621                         /*
1622                          * deny change if change will take class over the limit check it HERE, not after we found a matching class,
1623                          * because we should attempt to find another class if this one doesn't match us. -- w00t
1624                          */
1625                         if (c->limit && (c->GetReferenceCount() >= c->limit))
1626                         {
1627                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "OOPS: Connect class limit (%lu) hit, denying", c->limit);
1628                                 continue;
1629                         }
1630
1631                         /* if it requires a port ... */
1632                         int port = c->config->getInt("port");
1633                         if (port)
1634                         {
1635                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Requires port (%d)", port);
1636
1637                                 /* and our port doesn't match, fail. */
1638                                 if (this->GetServerPort() != port)
1639                                         continue;
1640                         }
1641
1642                         if (regdone && !c->config->getString("password").empty())
1643                         {
1644                                 if (ServerInstance->PassCompare(this, c->config->getString("password"), password, c->config->getString("hash")))
1645                                 {
1646                                         ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Bad password, skipping");
1647                                         continue;
1648                                 }
1649                         }
1650
1651                         /* we stop at the first class that meets ALL critera. */
1652                         found = c;
1653                         break;
1654                 }
1655         }
1656
1657         /*
1658          * Okay, assuming we found a class that matches.. switch us into that class, keeping refcounts up to date.
1659          */
1660         if (found)
1661         {
1662                 MyClass = found;
1663         }
1664 }
1665
1666 /* looks up a users password for their connection class (<ALLOW>/<DENY> tags)
1667  * NOTE: If the <ALLOW> or <DENY> tag specifies an ip, and this user resolves,
1668  * then their ip will be taken as 'priority' anyway, so for example,
1669  * <connect allow="127.0.0.1"> will match joe!bloggs@localhost
1670  */
1671 ConnectClass* LocalUser::GetClass()
1672 {
1673         return MyClass;
1674 }
1675
1676 ConnectClass* User::GetClass()
1677 {
1678         return NULL;
1679 }
1680
1681 void User::PurgeEmptyChannels()
1682 {
1683         // firstly decrement the count on each channel
1684         for (UCListIter f = this->chans.begin(); f != this->chans.end(); f++)
1685         {
1686                 Channel* c = *f;
1687                 c->DelUser(this);
1688         }
1689
1690         this->UnOper();
1691 }
1692
1693 const std::string& FakeUser::GetFullHost()
1694 {
1695         if (!ServerInstance->Config->HideWhoisServer.empty())
1696                 return ServerInstance->Config->HideWhoisServer;
1697         return server;
1698 }
1699
1700 const std::string& FakeUser::GetFullRealHost()
1701 {
1702         if (!ServerInstance->Config->HideWhoisServer.empty())
1703                 return ServerInstance->Config->HideWhoisServer;
1704         return server;
1705 }
1706
1707 ConnectClass::ConnectClass(ConfigTag* tag, char t, const std::string& mask)
1708         : config(tag), type(t), fakelag(true), name("unnamed"), registration_timeout(0), host(mask),
1709         pingtime(0), softsendqmax(0), hardsendqmax(0), recvqmax(0),
1710         penaltythreshold(0), commandrate(0), maxlocal(0), maxglobal(0), maxconnwarn(true), maxchans(0), limit(0)
1711 {
1712 }
1713
1714 ConnectClass::ConnectClass(ConfigTag* tag, char t, const std::string& mask, const ConnectClass& parent)
1715         : config(tag), type(t), fakelag(parent.fakelag), name("unnamed"),
1716         registration_timeout(parent.registration_timeout), host(mask), pingtime(parent.pingtime),
1717         softsendqmax(parent.softsendqmax), hardsendqmax(parent.hardsendqmax), recvqmax(parent.recvqmax),
1718         penaltythreshold(parent.penaltythreshold), commandrate(parent.commandrate),
1719         maxlocal(parent.maxlocal), maxglobal(parent.maxglobal), maxconnwarn(parent.maxconnwarn), maxchans(parent.maxchans),
1720         limit(parent.limit)
1721 {
1722 }
1723
1724 void ConnectClass::Update(const ConnectClass* src)
1725 {
1726         config = src->config;
1727         type = src->type;
1728         fakelag = src->fakelag;
1729         name = src->name;
1730         registration_timeout = src->registration_timeout;
1731         host = src->host;
1732         pingtime = src->pingtime;
1733         softsendqmax = src->softsendqmax;
1734         hardsendqmax = src->hardsendqmax;
1735         recvqmax = src->recvqmax;
1736         penaltythreshold = src->penaltythreshold;
1737         commandrate = src->commandrate;
1738         maxlocal = src->maxlocal;
1739         maxglobal = src->maxglobal;
1740         maxconnwarn = src->maxconnwarn;
1741         maxchans = src->maxchans;
1742         limit = src->limit;
1743 }