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
 228         SetClientIP(client);
 229         memcpy(&server_sa, servaddr, sizeof(irc::sockets::sockaddrs));
 230 }
 231
 232 User::~User()
 233 {
 234         if (ServerInstance->Users->uuidlist->find(uuid) != ServerInstance->Users->uuidlist->end())
 235                 ServerInstance->Logs->Log("USERS", DEFAULT, "User destructor for %s called without cull", uuid.c_str());
 236 }
 237
 238 const std::string& User::MakeHost()
 239 {
 240         if (!this->cached_makehost.empty())
 241                 return this->cached_makehost;
 242
 243         char nhost[MAXBUF];
 244         /* This is much faster than snprintf */
 245         char* t = nhost;
 246         for(const char* n = ident.c_str(); *n; n++)
 247                 *t++ = *n;
 248         *t++ = '@';
 249         for(const char* n = host.c_str(); *n; n++)
 250                 *t++ = *n;
 251         *t = 0;
 252
 253         this->cached_makehost.assign(nhost);
 254
 255         return this->cached_makehost;
 256 }
 257
 258 const std::string& User::MakeHostIP()
 259 {
 260         if (!this->cached_hostip.empty())
 261                 return this->cached_hostip;
 262
 263         char ihost[MAXBUF];
 264         /* This is much faster than snprintf */
 265         char* t = ihost;
 266         for(const char* n = ident.c_str(); *n; n++)
 267                 *t++ = *n;
 268         *t++ = '@';
 269         for(const char* n = this->GetIPString(); *n; n++)
 270                 *t++ = *n;
 271         *t = 0;
 272
 273         this->cached_hostip = ihost;
 274
 275         return this->cached_hostip;
 276 }
 277
 278 const std::string& User::GetFullHost()
 279 {
 280         if (!this->cached_fullhost.empty())
 281                 return this->cached_fullhost;
 282
 283         char result[MAXBUF];
 284         char* t = result;
 285         for(const char* n = nick.c_str(); *n; n++)
 286                 *t++ = *n;
 287         *t++ = '!';
 288         for(const char* n = ident.c_str(); *n; n++)
 289                 *t++ = *n;
 290         *t++ = '@';
 291         for(const char* n = dhost.c_str(); *n; n++)
 292                 *t++ = *n;
 293         *t = 0;
 294
 295         this->cached_fullhost = result;
 296
 297         return this->cached_fullhost;
 298 }
 299
 300 char* User::MakeWildHost()
 301 {
 302         static char nresult[MAXBUF];
 303         char* t = nresult;
 304         *t++ = '*';     *t++ = '!';
 305         *t++ = '*';     *t++ = '@';
 306         for(const char* n = dhost.c_str(); *n; n++)
 307                 *t++ = *n;
 308         *t = 0;
 309         return nresult;
 310 }
 311
 312 const std::string& User::GetFullRealHost()
 313 {
 314         if (!this->cached_fullrealhost.empty())
 315                 return this->cached_fullrealhost;
 316
 317         char fresult[MAXBUF];
 318         char* t = fresult;
 319         for(const char* n = nick.c_str(); *n; n++)
 320                 *t++ = *n;
 321         *t++ = '!';
 322         for(const char* n = ident.c_str(); *n; n++)
 323                 *t++ = *n;
 324         *t++ = '@';
 325         for(const char* n = host.c_str(); *n; n++)
 326                 *t++ = *n;
 327         *t = 0;
 328
 329         this->cached_fullrealhost = fresult;
 330
 331         return this->cached_fullrealhost;
 332 }
 333
 334 bool LocalUser::IsInvited(const irc::string &channel)
 335 {
 336         time_t now = ServerInstance->Time();
 337         InvitedList::iterator safei;
 338         for (InvitedList::iterator i = invites.begin(); i != invites.end(); ++i)
 339         {
 340                 if (channel == i->first)
 341                 {
 342                         if (i->second != 0 && now > i->second)
 343                         {
 344                                 /* Expired invite, remove it. */
 345                                 safei = i;
 346                                 --i;
 347                                 invites.erase(safei);
 348                                 continue;
 349                         }
 350                         return true;
 351                 }
 352         }
 353         return false;
 354 }
 355
 356 InvitedList* LocalUser::GetInviteList()
 357 {
 358         time_t now = ServerInstance->Time();
 359         /* Weed out expired invites here. */
 360         InvitedList::iterator safei;
 361         for (InvitedList::iterator i = invites.begin(); i != invites.end(); ++i)
 362         {
 363                 if (i->second != 0 && now > i->second)
 364                 {
 365                         /* Expired invite, remove it. */
 366                         safei = i;
 367                         --i;
 368                         invites.erase(safei);
 369                 }
 370         }
 371         return &invites;
 372 }
 373
 374 void LocalUser::InviteTo(const irc::string &channel, time_t invtimeout)
 375 {
 376         time_t now = ServerInstance->Time();
 377         if (invtimeout != 0 && now > invtimeout) return; /* Don't add invites that are expired from the get-go. */
 378         for (InvitedList::iterator i = invites.begin(); i != invites.end(); ++i)
 379         {
 380                 if (channel == i->first)
 381                 {
 382                         if (i->second != 0 && invtimeout > i->second)
 383                         {
 384                                 i->second = invtimeout;
 385                         }
 386
 387                         return;
 388                 }
 389         }
 390         invites.push_back(std::make_pair(channel, invtimeout));
 391 }
 392
 393 void LocalUser::RemoveInvite(const irc::string &channel)
 394 {
 395         for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
 396         {
 397                 if (channel == i->first)
 398                 {
 399                         invites.erase(i);
 400                         return;
 401                 }
 402         }
 403 }
 404
 405 bool User::HasModePermission(unsigned char, ModeType)
 406 {
 407         return true;
 408 }
 409
 410 bool LocalUser::HasModePermission(unsigned char mode, ModeType type)
 411 {
 412         if (!IS_OPER(this))
 413                 return false;
 414
 415         if (mode < 'A' || mode > ('A' + 64)) return false;
 416
 417         return ((type == MODETYPE_USER ? oper->AllowedUserModes : oper->AllowedChanModes))[(mode - 'A')];
 418
 419 }
 420 /*
 421  * users on remote servers can completely bypass all permissions based checks.
 422  * This prevents desyncs when one server has different type/class tags to another.
 423  * That having been said, this does open things up to the possibility of source changes
 424  * allowing remote kills, etc - but if they have access to the src, they most likely have
 425  * access to the conf - so it's an end to a means either way.
 426  */
 427 bool User::HasPermission(const std::string&)
 428 {
 429         return true;
 430 }
 431
 432 bool LocalUser::HasPermission(const std::string &command)
 433 {
 434         // are they even an oper at all?
 435         if (!IS_OPER(this))
 436         {
 437                 return false;
 438         }
 439
 440         if (oper->AllowedOperCommands.find(command) != oper->AllowedOperCommands.end())
 441                 return true;
 442         else if (oper->AllowedOperCommands.find("*") != oper->AllowedOperCommands.end())
 443                 return true;
 444
 445         return false;
 446 }
 447
 448 bool User::HasPrivPermission(const std::string &privstr, bool noisy)
 449 {
 450         return true;
 451 }
 452
 453 bool LocalUser::HasPrivPermission(const std::string &privstr, bool noisy)
 454 {
 455         if (!IS_OPER(this))
 456         {
 457                 if (noisy)
 458                         this->WriteServ("NOTICE %s :You are not an oper", this->nick.c_str());
 459                 return false;
 460         }
 461
 462         if (oper->AllowedPrivs.find(privstr) != oper->AllowedPrivs.end())
 463         {
 464                 return true;
 465         }
 466         else if (oper->AllowedPrivs.find("*") != oper->AllowedPrivs.end())
 467         {
 468                 return true;
 469         }
 470
 471         if (noisy)
 472                 this->WriteServ("NOTICE %s :Oper type %s does not have access to priv %s", this->nick.c_str(), oper->NameStr(), privstr.c_str());
 473         return false;
 474 }
 475
 476 void UserIOHandler::OnDataReady()
 477 {
 478         if (user->quitting)
 479                 return;
 480
 481         if (recvq.length() > user->MyClass->GetRecvqMax() && !user->HasPrivPermission("users/flood/increased-buffers"))
 482         {
 483                 ServerInstance->Users->QuitUser(user, "RecvQ exceeded");
 484                 ServerInstance->SNO->WriteToSnoMask('a', "User %s RecvQ of %lu exceeds connect class maximum of %lu",
 485                         user->nick.c_str(), (unsigned long)recvq.length(), user->MyClass->GetRecvqMax());
 486         }
 487         unsigned long sendqmax = ULONG_MAX;
 488         if (!user->HasPrivPermission("users/flood/increased-buffers"))
 489                 sendqmax = user->MyClass->GetSendqSoftMax();
 490         unsigned long penaltymax = ULONG_MAX;
 491         if (!user->HasPrivPermission("users/flood/no-fakelag"))
 492                 penaltymax = user->MyClass->GetPenaltyThreshold() * 1000;
 493
 494         while (user->CommandFloodPenalty < penaltymax && getSendQSize() < sendqmax)
 495         {
 496                 std::string line;
 497                 line.reserve(MAXBUF);
 498                 std::string::size_type qpos = 0;
 499                 while (qpos < recvq.length())
 500                 {
 501                         char c = recvq[qpos++];
 502                         switch (c)
 503                         {
 504                         case '\0':
 505                                 c = ' ';
 506                                 break;
 507                         case '\r':
 508                                 continue;
 509                         case '\n':
 510                                 goto eol_found;
 511                         }
 512                         if (line.length() < MAXBUF - 2)
 513                                 line.push_back(c);
 514                 }
 515                 // if we got here, the recvq ran out before we found a newline
 516                 return;
 517 eol_found:
 518                 // just found a newline. Terminate the string, and pull it out of recvq
 519                 recvq = recvq.substr(qpos);
 520
 521                 // TODO should this be moved to when it was inserted in recvq?
 522                 ServerInstance->stats->statsRecv += qpos;
 523                 user->bytes_in += qpos;
 524                 user->cmds_in++;
 525
 526                 ServerInstance->Parser->ProcessBuffer(line, user);
 527                 if (user->quitting)
 528                         return;
 529         }
 530         if (user->CommandFloodPenalty >= penaltymax && !user->MyClass->fakelag)
 531                 ServerInstance->Users->QuitUser(user, "Excess Flood");
 532 }
 533
 534 void UserIOHandler::AddWriteBuf(const std::string &data)
 535 {
 536         if (user->quitting_sendq)
 537                 return;
 538         if (!user->quitting && getSendQSize() + data.length() > user->MyClass->GetSendqHardMax() &&
 539                 !user->HasPrivPermission("users/flood/increased-buffers"))
 540         {
 541                 user->quitting_sendq = true;
 542                 ServerInstance->GlobalCulls.AddSQItem(user);
 543                 return;
 544         }
 545
 546         // We still want to append data to the sendq of a quitting user,
 547         // e.g. their ERROR message that says 'closing link'
 548
 549         WriteData(data);
 550 }
 551
 552 void UserIOHandler::OnError(BufferedSocketError)
 553 {
 554         ServerInstance->Users->QuitUser(user, getError());
 555 }
 556
 557 CullResult User::cull()
 558 {
 559         if (!quitting)
 560                 ServerInstance->Users->QuitUser(this, "Culled without QuitUser");
 561         PurgeEmptyChannels();
 562
 563         this->InvalidateCache();
 564
 565         if (client_sa.sa.sa_family != AF_UNSPEC)
 566                 ServerInstance->Users->RemoveCloneCounts(this);
 567
 568         return Extensible::cull();
 569 }
 570
 571 CullResult LocalUser::cull()
 572 {
 573         std::vector<LocalUser*>::iterator x = find(ServerInstance->Users->local_users.begin(),ServerInstance->Users->local_users.end(),this);
 574         if (x != ServerInstance->Users->local_users.end())
 575                 ServerInstance->Users->local_users.erase(x);
 576         else
 577                 ServerInstance->Logs->Log("USERS", DEBUG, "Failed to remove user from vector");
 578
 579         eh.cull();
 580         return User::cull();
 581 }
 582
 583 CullResult FakeUser::cull()
 584 {
 585         // Fake users don't quit, they just get culled.
 586         quitting = true;
 587         ServerInstance->Users->clientlist->erase(nick);
 588         ServerInstance->Users->uuidlist->erase(uuid);
 589         return User::cull();
 590 }
 591
 592 void User::Oper(OperInfo* info)
 593 {
 594         if (this->IsModeSet('o'))
 595                 this->UnOper();
 596
 597         this->modes[UM_OPERATOR] = 1;
 598         this->oper = info;
 599         this->WriteServ("MODE %s :+o", this->nick.c_str());
 600         FOREACH_MOD(I_OnOper, OnOper(this, info->name));
 601
 602         std::string opername;
 603         if (info->oper_block)
 604                 opername = info->oper_block->getString("name");
 605
 606         if (IS_LOCAL(this))
 607         {
 608                 LocalUser* l = IS_LOCAL(this);
 609                 std::string vhost = oper->getConfig("vhost");
 610                 if (!vhost.empty())
 611                         l->ChangeDisplayedHost(vhost.c_str());
 612                 std::string opClass = oper->getConfig("class");
 613                 if (!opClass.empty())
 614                         l->SetClass(opClass);
 615         }
 616
 617         ServerInstance->SNO->WriteToSnoMask('o',"%s (%s@%s) is now an IRC operator of type %s (using oper '%s')",
 618                 nick.c_str(), ident.c_str(), host.c_str(), oper->NameStr(), opername.c_str());
 619         this->WriteNumeric(381, "%s :You are now %s %s", nick.c_str(), strchr("aeiouAEIOU", oper->name[0]) ? "an" : "a", oper->NameStr());
 620
 621         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());
 622         ServerInstance->Users->all_opers.push_back(this);
 623
 624         // Expand permissions from config for faster lookup
 625         if (IS_LOCAL(this))
 626                 oper->init();
 627
 628         FOREACH_MOD(I_OnPostOper,OnPostOper(this, oper->name, opername));
 629 }
 630
 631 void OperInfo::init()
 632 {
 633         AllowedOperCommands.clear();
 634         AllowedPrivs.clear();
 635         AllowedUserModes.reset();
 636         AllowedChanModes.reset();
 637         AllowedUserModes['o' - 'A'] = true; // Call me paranoid if you want.
 638
 639         for(std::vector<reference<ConfigTag> >::iterator iter = class_blocks.begin(); iter != class_blocks.end(); ++iter)
 640         {
 641                 ConfigTag* tag = *iter;
 642                 std::string mycmd, mypriv;
 643                 /* Process commands */
 644                 irc::spacesepstream CommandList(tag->getString("commands"));
 645                 while (CommandList.GetToken(mycmd))
 646                 {
 647                         AllowedOperCommands.insert(mycmd);
 648                 }
 649
 650                 irc::spacesepstream PrivList(tag->getString("privs"));
 651                 while (PrivList.GetToken(mypriv))
 652                 {
 653                         AllowedPrivs.insert(mypriv);
 654                 }
 655
 656                 for (unsigned char* c = (unsigned char*)tag->getString("usermodes").c_str(); *c; ++c)
 657                 {
 658                         if (*c == '*')
 659                         {
 660                                 this->AllowedUserModes.set();
 661                         }
 662                         else if (*c >= 'A' && *c < 'z')
 663                         {
 664                                 this->AllowedUserModes[*c - 'A'] = true;
 665                         }
 666                 }
 667
 668                 for (unsigned char* c = (unsigned char*)tag->getString("chanmodes").c_str(); *c; ++c)
 669                 {
 670                         if (*c == '*')
 671                         {
 672                                 this->AllowedChanModes.set();
 673                         }
 674                         else if (*c >= 'A' && *c < 'z')
 675                         {
 676                                 this->AllowedChanModes[*c - 'A'] = true;
 677                         }
 678                 }
 679         }
 680 }
 681
 682 void User::UnOper()
 683 {
 684         if (!IS_OPER(this))
 685                 return;
 686
 687         /*
 688          * unset their oper type (what IS_OPER checks).
 689          * note, order is important - this must come before modes as -o attempts
 690          * to call UnOper. -- w00t
 691          */
 692         oper = NULL;
 693
 694
 695         /* Remove all oper only modes from the user when the deoper - Bug #466*/
 696         std::string moderemove("-");
 697
 698         for (unsigned char letter = 'A'; letter <= 'z'; letter++)
 699         {
 700                 ModeHandler* mh = ServerInstance->Modes->FindMode(letter, MODETYPE_USER);
 701                 if (mh && mh->NeedsOper())
 702                         moderemove += letter;
 703         }
 704
 705
 706         std::vector<std::string> parameters;
 707         parameters.push_back(this->nick);
 708         parameters.push_back(moderemove);
 709
 710         ServerInstance->Parser->CallHandler("MODE", parameters, this);
 711
 712         /* remove the user from the oper list. Will remove multiple entries as a safeguard against bug #404 */
 713         ServerInstance->Users->all_opers.remove(this);
 714
 715         this->modes[UM_OPERATOR] = 0;
 716 }
 717
 718 /* adds or updates an entry in the whowas list */
 719 void User::AddToWhoWas()
 720 {
 721         Module* whowas = ServerInstance->Modules->Find("cmd_whowas.so");
 722         if (whowas)
 723         {
 724                 WhowasRequest req(NULL, whowas, WhowasRequest::WHOWAS_ADD);
 725                 req.user = this;
 726                 req.Send();
 727         }
 728 }
 729
 730 /*
 731  * Check class restrictions
 732  */
 733 void LocalUser::CheckClass()
 734 {
 735         ConnectClass* a = this->MyClass;
 736
 737         if (!a)
 738         {
 739                 ServerInstance->Users->QuitUser(this, "Access denied by configuration");
 740                 return;
 741         }
 742         else if (a->type == CC_DENY)
 743         {
 744                 ServerInstance->Users->QuitUser(this, a->config->getString("reason", "Unauthorised connection"));
 745                 return;
 746         }
 747         else if ((a->GetMaxLocal()) && (ServerInstance->Users->LocalCloneCount(this) > a->GetMaxLocal()))
 748         {
 749                 ServerInstance->Users->QuitUser(this, "No more connections allowed from your host via this connect class (local)");
 750                 if (a->maxconnwarn)
 751                         ServerInstance->SNO->WriteToSnoMask('a', "WARNING: maximum LOCAL connections (%ld) exceeded for IP %s", a->GetMaxLocal(), this->GetIPString());
 752                 return;
 753         }
 754         else if ((a->GetMaxGlobal()) && (ServerInstance->Users->GlobalCloneCount(this) > a->GetMaxGlobal()))
 755         {
 756                 ServerInstance->Users->QuitUser(this, "No more connections allowed from your host via this connect class (global)");
 757                 if (a->maxconnwarn)
 758                         ServerInstance->SNO->WriteToSnoMask('a', "WARNING: maximum GLOBAL connections (%ld) exceeded for IP %s", a->GetMaxGlobal(), this->GetIPString());
 759                 return;
 760         }
 761
 762         this->nping = ServerInstance->Time() + a->GetPingTime() + ServerInstance->Config->dns_timeout;
 763 }
 764
 765 bool User::CheckLines(bool doZline)
 766 {
 767         const char* check[] = { "G" , "K", (doZline) ? "Z" : NULL, NULL };
 768
 769         if (!this->exempt)
 770         {
 771                 for (int n = 0; check[n]; ++n)
 772                 {
 773                         XLine *r = ServerInstance->XLines->MatchesLine(check[n], this);
 774
 775                         if (r)
 776                         {
 777                                 r->Apply(this);
 778                                 return true;
 779                         }
 780                 }
 781         }
 782
 783         return false;
 784 }
 785
 786 void LocalUser::FullConnect()
 787 {
 788         ServerInstance->stats->statsConnects++;
 789         this->idle_lastmsg = ServerInstance->Time();
 790
 791         /*
 792          * You may be thinking "wtf, we checked this in User::AddClient!" - and yes, we did, BUT.
 793          * At the time AddClient is called, we don't have a resolved host, by here we probably do - which
 794          * may put the user into a totally seperate class with different restrictions! so we *must* check again.
 795          * Don't remove this! -- w00t
 796          */
 797         MyClass = NULL;
 798         SetClass();
 799         CheckClass();
 800         CheckLines();
 801
 802         if (quitting)
 803                 return;
 804
 805         this->WriteServ("NOTICE Auth :Welcome to \002%s\002!",ServerInstance->Config->Network.c_str());
 806         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());
 807         this->WriteNumeric(RPL_YOURHOSTIS, "%s :Your host is %s, running version InspIRCd-2.0",this->nick.c_str(),ServerInstance->Config->ServerName.c_str());
 808         this->WriteNumeric(RPL_SERVERCREATED, "%s :This server was created %s %s", this->nick.c_str(), __TIME__, __DATE__);
 809         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());
 810
 811         ServerInstance->Config->Send005(this);
 812         this->WriteNumeric(RPL_YOURUUID, "%s %s :your unique ID", this->nick.c_str(), this->uuid.c_str());
 813
 814         /* Now registered */
 815         if (ServerInstance->Users->unregistered_count)
 816                 ServerInstance->Users->unregistered_count--;
 817
 818         /* Trigger MOTD and LUSERS output, give modules a chance too */
 819         ModResult MOD_RESULT;
 820         std::string command("MOTD");
 821         std::vector<std::string> parameters;
 822         FIRST_MOD_RESULT(OnPreCommand, MOD_RESULT, (command, parameters, this, true, command));
 823         if (!MOD_RESULT)
 824                 ServerInstance->CallCommandHandler(command, parameters, this);
 825
 826         MOD_RESULT = MOD_RES_PASSTHRU;
 827         command = "LUSERS";
 828         FIRST_MOD_RESULT(OnPreCommand, MOD_RESULT, (command, parameters, this, true, command));
 829         if (!MOD_RESULT)
 830                 ServerInstance->CallCommandHandler(command, parameters, this);
 831
 832         if (ServerInstance->Config->RawLog)
 833                 WriteServ("PRIVMSG %s :*** Raw I/O logging is enabled on this server. All messages, passwords, and commands are being recorded.", nick.c_str());
 834
 835         /*
 836          * We don't set REG_ALL until triggering OnUserConnect, so some module events don't spew out stuff
 837          * for a user that doesn't exist yet.
 838          */
 839         FOREACH_MOD(I_OnUserConnect,OnUserConnect(this));
 840
 841         this->registered = REG_ALL;
 842
 843         FOREACH_MOD(I_OnPostConnect,OnPostConnect(this));
 844
 845         ServerInstance->SNO->WriteToSnoMask('c',"Client connecting on port %d (class %s): %s!%s@%s (%s) [%s]",
 846                 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());
 847         ServerInstance->Logs->Log("BANCACHE", DEBUG, "BanCache: Adding NEGATIVE hit for %s", this->GetIPString());
 848         ServerInstance->BanCache->AddHit(this->GetIPString(), "", "");
 849         // reset the flood penalty (which could have been raised due to things like auto +x)
 850         CommandFloodPenalty = 0;
 851 }
 852
 853 void User::InvalidateCache()
 854 {
 855         /* Invalidate cache */
 856         cached_fullhost.clear();
 857         cached_hostip.clear();
 858         cached_makehost.clear();
 859         cached_fullrealhost.clear();
 860 }
 861
 862 bool User::ChangeNick(const std::string& newnick, bool force)
 863 {
 864         ModResult MOD_RESULT;
 865
 866         if (force)
 867                 ServerInstance->NICKForced.set(this, 1);
 868         FIRST_MOD_RESULT(OnUserPreNick, MOD_RESULT, (this, newnick));
 869         ServerInstance->NICKForced.set(this, 0);
 870
 871         if (MOD_RESULT == MOD_RES_DENY)
 872         {
 873                 ServerInstance->stats->statsCollisions++;
 874                 return false;
 875         }
 876
 877         if (assign(newnick) == assign(nick))
 878         {
 879                 // case change, don't need to check Q:lines and such
 880                 // and, if it's identical including case, we can leave right now
 881                 if (newnick == nick)
 882                         return true;
 883         }
 884         else
 885         {
 886                 /*
 887                  * Don't check Q:Lines if it's a server-enforced change, just on the off-chance some fucking *moron*
 888                  * tries to Q:Line SIDs, also, this means we just get our way period, as it really should be.
 889                  * Thanks Kein for finding this. -- w00t
 890                  *
 891                  * Also don't check Q:Lines for remote nickchanges, they should have our Q:Lines anyway to enforce themselves.
 892                  *              -- w00t
 893                  */
 894                 if (IS_LOCAL(this) && !force)
 895                 {
 896                         XLine* mq = ServerInstance->XLines->MatchesLine("Q",newnick);
 897                         if (mq)
 898                         {
 899                                 if (this->registered == REG_ALL)
 900                                 {
 901                                         ServerInstance->SNO->WriteGlobalSno('a', "Q-Lined nickname %s from %s!%s@%s: %s",
 902                                                 newnick.c_str(), this->nick.c_str(), this->ident.c_str(), this->host.c_str(), mq->reason.c_str());
 903                                 }
 904                                 this->WriteNumeric(432, "%s %s :Invalid nickname: %s",this->nick.c_str(), newnick.c_str(), mq->reason.c_str());
 905                                 return false;
 906                         }
 907
 908                         if (ServerInstance->Config->RestrictBannedUsers)
 909                         {
 910                                 for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
 911                                 {
 912                                         Channel *chan = *i;
 913                                         if (chan->GetPrefixValue(this) < VOICE_VALUE && chan->IsBanned(this))
 914                                         {
 915                                                 this->WriteNumeric(404, "%s %s :Cannot send to channel (you're banned)", this->nick.c_str(), chan->name.c_str());
 916                                                 return false;
 917                                         }
 918                                 }
 919                         }
 920                 }
 921
 922                 /*
 923                  * Uh oh.. if the nickname is in use, and it's not in use by the person using it (doh) --
 924                  * then we have a potential collide. Check whether someone else is camping on the nick
 925                  * (i.e. connect -> send NICK, don't send USER.) If they are camping, force-change the
 926                  * camper to their UID, and allow the incoming nick change.
 927                  *
 928                  * If the guy using the nick is already using it, tell the incoming nick change to gtfo,
 929                  * because the nick is already (rightfully) in use. -- w00t
 930                  */
 931                 User* InUse = ServerInstance->FindNickOnly(newnick);
 932                 if (InUse && (InUse != this))
 933                 {
 934                         if (InUse->registered != REG_ALL)
 935                         {
 936                                 /* force the camper to their UUID, and ask them to re-send a NICK. */
 937                                 InUse->WriteTo(InUse, "NICK %s", InUse->uuid.c_str());
 938                                 InUse->WriteNumeric(433, "%s %s :Nickname overruled.", InUse->nick.c_str(), InUse->nick.c_str());
 939
 940                                 ServerInstance->Users->clientlist->erase(InUse->nick);
 941                                 (*(ServerInstance->Users->clientlist))[InUse->uuid] = InUse;
 942
 943                                 InUse->nick = InUse->uuid;
 944                                 InUse->InvalidateCache();
 945                                 InUse->registered &= ~REG_NICK;
 946                         }
 947                         else
 948                         {
 949                                 /* No camping, tell the incoming user  to stop trying to change nick ;p */
 950                                 this->WriteNumeric(433, "%s %s :Nickname is already in use.", this->registered >= REG_NICK ? this->nick.c_str() : "*", newnick.c_str());
 951                                 return false;
 952                         }
 953                 }
 954         }
 955
 956         if (this->registered == REG_ALL)
 957                 this->WriteCommon("NICK %s",newnick.c_str());
 958         std::string oldnick = nick;
 959         nick = newnick;
 960
 961         InvalidateCache();
 962         ServerInstance->Users->clientlist->erase(oldnick);
 963         (*(ServerInstance->Users->clientlist))[newnick] = this;
 964
 965         if (registered == REG_ALL)
 966                 FOREACH_MOD(I_OnUserPostNick,OnUserPostNick(this,oldnick));
 967
 968         return true;
 969 }
 970
 971 int LocalUser::GetServerPort()
 972 {
 973         switch (this->server_sa.sa.sa_family)
 974         {
 975                 case AF_INET6:
 976                         return htons(this->server_sa.in6.sin6_port);
 977                 case AF_INET:
 978                         return htons(this->server_sa.in4.sin_port);
 979         }
 980         return 0;
 981 }
 982
 983 const char* User::GetIPString()
 984 {
 985         int port;
 986         if (cachedip.empty())
 987         {
 988                 irc::sockets::satoap(client_sa, cachedip, port);
 989                 /* IP addresses starting with a : on irc are a Bad Thing (tm) */
 990                 if (cachedip.c_str()[0] == ':')
 991                         cachedip.insert(0,1,'0');
 992         }
 993
 994         return cachedip.c_str();
 995 }
 996
 997 irc::sockets::cidr_mask User::GetCIDRMask()
 998 {
 999         int range = 0;
1000         switch (client_sa.sa.sa_family)
1001         {
1002                 case AF_INET6:
1003                         range = ServerInstance->Config->c_ipv6_range;
1004                         break;
1005                 case AF_INET:
1006                         range = ServerInstance->Config->c_ipv4_range;
1007                         break;
1008         }
1009         return irc::sockets::cidr_mask(client_sa, range);
1010 }
1011
1012 bool User::SetClientIP(irc::sockets::sockaddrs *sa)
1013 {
1014         memcpy(&client_sa, sa, sizeof(irc::sockets::sockaddrs));
1015
1016         FOREACH_MOD(I_OnSetClientIP, OnSetClientIP(this));
1017
1018         return true;
1019 }
1020
1021 bool User::SetClientIP(const char* sip)
1022 {
1023         irc::sockets::sockaddrs sa;
1024
1025         this->cachedip = "";
1026         if (!irc::sockets::aptosa(sip, 0, sa))
1027                 return false;
1028
1029         return SetClientIP(&sa);
1030 }
1031
1032 static std::string wide_newline("\r\n");
1033
1034 void User::Write(const std::string& text)
1035 {
1036 }
1037
1038 void User::Write(const char *text, ...)
1039 {
1040 }
1041
1042 void LocalUser::Write(const std::string& text)
1043 {
1044         if (!ServerInstance->SE->BoundsCheckFd(&eh))
1045                 return;
1046
1047         if (text.length() > MAXBUF - 2)
1048         {
1049                 // this should happen rarely or never. Crop the string at 512 and try again.
1050                 std::string try_again = text.substr(0, MAXBUF - 2);
1051                 Write(try_again);
1052                 return;
1053         }
1054
1055         ServerInstance->Logs->Log("USEROUTPUT", RAWIO, "C[%s] O %s", uuid.c_str(), text.c_str());
1056
1057         eh.AddWriteBuf(text);
1058         eh.AddWriteBuf(wide_newline);
1059
1060         ServerInstance->stats->statsSent += text.length() + 2;
1061         this->bytes_out += text.length() + 2;
1062         this->cmds_out++;
1063 }
1064
1065 /** Write()
1066  */
1067 void LocalUser::Write(const char *text, ...)
1068 {
1069         va_list argsPtr;
1070         char textbuffer[MAXBUF];
1071
1072         va_start(argsPtr, text);
1073         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1074         va_end(argsPtr);
1075
1076         this->Write(std::string(textbuffer));
1077 }
1078
1079 void User::WriteServ(const std::string& text)
1080 {
1081         this->Write(":%s %s",ServerInstance->Config->ServerName.c_str(),text.c_str());
1082 }
1083
1084 /** WriteServ()
1085  *  Same as Write(), except `text' is prefixed with `:server.name '.
1086  */
1087 void User::WriteServ(const char* text, ...)
1088 {
1089         va_list argsPtr;
1090         char textbuffer[MAXBUF];
1091
1092         va_start(argsPtr, text);
1093         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1094         va_end(argsPtr);
1095
1096         this->WriteServ(std::string(textbuffer));
1097 }
1098
1099
1100 void User::WriteNumeric(unsigned int numeric, const char* text, ...)
1101 {
1102         va_list argsPtr;
1103         char textbuffer[MAXBUF];
1104
1105         va_start(argsPtr, text);
1106         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1107         va_end(argsPtr);
1108
1109         this->WriteNumeric(numeric, std::string(textbuffer));
1110 }
1111
1112 void User::WriteNumeric(unsigned int numeric, const std::string &text)
1113 {
1114         char textbuffer[MAXBUF];
1115         ModResult MOD_RESULT;
1116
1117         FIRST_MOD_RESULT(OnNumeric, MOD_RESULT, (this, numeric, text));
1118
1119         if (MOD_RESULT == MOD_RES_DENY)
1120                 return;
1121
1122         snprintf(textbuffer,MAXBUF,":%s %03u %s",ServerInstance->Config->ServerName.c_str(), numeric, text.c_str());
1123         this->Write(std::string(textbuffer));
1124 }
1125
1126 void User::WriteFrom(User *user, const std::string &text)
1127 {
1128         char tb[MAXBUF];
1129
1130         snprintf(tb,MAXBUF,":%s %s",user->GetFullHost().c_str(),text.c_str());
1131
1132         this->Write(std::string(tb));
1133 }
1134
1135
1136 /* write text from an originating user to originating user */
1137
1138 void User::WriteFrom(User *user, const char* text, ...)
1139 {
1140         va_list argsPtr;
1141         char textbuffer[MAXBUF];
1142
1143         va_start(argsPtr, text);
1144         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1145         va_end(argsPtr);
1146
1147         this->WriteFrom(user, std::string(textbuffer));
1148 }
1149
1150
1151 /* write text to an destination user from a source user (e.g. user privmsg) */
1152
1153 void User::WriteTo(User *dest, const char *data, ...)
1154 {
1155         char textbuffer[MAXBUF];
1156         va_list argsPtr;
1157
1158         va_start(argsPtr, data);
1159         vsnprintf(textbuffer, MAXBUF, data, argsPtr);
1160         va_end(argsPtr);
1161
1162         this->WriteTo(dest, std::string(textbuffer));
1163 }
1164
1165 void User::WriteTo(User *dest, const std::string &data)
1166 {
1167         dest->WriteFrom(this, data);
1168 }
1169
1170 void User::WriteCommon(const char* text, ...)
1171 {
1172         char textbuffer[MAXBUF];
1173         va_list argsPtr;
1174
1175         if (this->registered != REG_ALL || quitting)
1176                 return;
1177
1178         int len = snprintf(textbuffer,MAXBUF,":%s ",this->GetFullHost().c_str());
1179
1180         va_start(argsPtr, text);
1181         vsnprintf(textbuffer + len, MAXBUF - len, text, argsPtr);
1182         va_end(argsPtr);
1183
1184         this->WriteCommonRaw(std::string(textbuffer), true);
1185 }
1186
1187 void User::WriteCommonExcept(const char* text, ...)
1188 {
1189         char textbuffer[MAXBUF];
1190         va_list argsPtr;
1191
1192         if (this->registered != REG_ALL || quitting)
1193                 return;
1194
1195         int len = snprintf(textbuffer,MAXBUF,":%s ",this->GetFullHost().c_str());
1196
1197         va_start(argsPtr, text);
1198         vsnprintf(textbuffer + len, MAXBUF - len, text, argsPtr);
1199         va_end(argsPtr);
1200
1201         this->WriteCommonRaw(std::string(textbuffer), false);
1202 }
1203
1204 void User::WriteCommonRaw(const std::string &line, bool include_self)
1205 {
1206         if (this->registered != REG_ALL || quitting)
1207                 return;
1208
1209         LocalUser::already_sent_id++;
1210
1211         UserChanList include_c(chans);
1212         std::map<User*,bool> exceptions;
1213
1214         exceptions[this] = include_self;
1215
1216         FOREACH_MOD(I_OnBuildNeighborList,OnBuildNeighborList(this, include_c, exceptions));
1217
1218         for (std::map<User*,bool>::iterator i = exceptions.begin(); i != exceptions.end(); ++i)
1219         {
1220                 LocalUser* u = IS_LOCAL(i->first);
1221                 if (u && !u->quitting)
1222                 {
1223                         u->already_sent = LocalUser::already_sent_id;
1224                         if (i->second)
1225                                 u->Write(line);
1226                 }
1227         }
1228         for (UCListIter v = include_c.begin(); v != include_c.end(); ++v)
1229         {
1230                 Channel* c = *v;
1231                 const UserMembList* ulist = c->GetUsers();
1232                 for (UserMembList::const_iterator i = ulist->begin(); i != ulist->end(); i++)
1233                 {
1234                         LocalUser* u = IS_LOCAL(i->first);
1235                         if (u && !u->quitting && u->already_sent != LocalUser::already_sent_id)
1236                         {
1237                                 u->already_sent = LocalUser::already_sent_id;
1238                                 u->Write(line);
1239                         }
1240                 }
1241         }
1242 }
1243
1244 void User::WriteCommonQuit(const std::string &normal_text, const std::string &oper_text)
1245 {
1246         char tb1[MAXBUF];
1247         char tb2[MAXBUF];
1248
1249         if (this->registered != REG_ALL)
1250                 return;
1251
1252         already_sent_t uniq_id = ++LocalUser::already_sent_id;
1253
1254         snprintf(tb1,MAXBUF,":%s QUIT :%s",this->GetFullHost().c_str(),normal_text.c_str());
1255         snprintf(tb2,MAXBUF,":%s QUIT :%s",this->GetFullHost().c_str(),oper_text.c_str());
1256         std::string out1 = tb1;
1257         std::string out2 = tb2;
1258
1259         UserChanList include_c(chans);
1260         std::map<User*,bool> exceptions;
1261
1262         FOREACH_MOD(I_OnBuildNeighborList,OnBuildNeighborList(this, include_c, exceptions));
1263
1264         for (std::map<User*,bool>::iterator i = exceptions.begin(); i != exceptions.end(); ++i)
1265         {
1266                 LocalUser* u = IS_LOCAL(i->first);
1267                 if (u && !u->quitting)
1268                 {
1269                         u->already_sent = uniq_id;
1270                         if (i->second)
1271                                 u->Write(IS_OPER(u) ? out2 : out1);
1272                 }
1273         }
1274         for (UCListIter v = include_c.begin(); v != include_c.end(); ++v)
1275         {
1276                 const UserMembList* ulist = (*v)->GetUsers();
1277                 for (UserMembList::const_iterator i = ulist->begin(); i != ulist->end(); i++)
1278                 {
1279                         LocalUser* u = IS_LOCAL(i->first);
1280                         if (u && !u->quitting && (u->already_sent != uniq_id))
1281                         {
1282                                 u->already_sent = uniq_id;
1283                                 u->Write(IS_OPER(u) ? out2 : out1);
1284                         }
1285                 }
1286         }
1287 }
1288
1289 void LocalUser::SendText(const std::string& line)
1290 {
1291         Write(line);
1292 }
1293
1294 void RemoteUser::SendText(const std::string& line)
1295 {
1296         ServerInstance->PI->PushToClient(this, line);
1297 }
1298
1299 void FakeUser::SendText(const std::string& line)
1300 {
1301 }
1302
1303 void User::SendText(const char *text, ...)
1304 {
1305         va_list argsPtr;
1306         char line[MAXBUF];
1307
1308         va_start(argsPtr, text);
1309         vsnprintf(line, MAXBUF, text, argsPtr);
1310         va_end(argsPtr);
1311
1312         SendText(std::string(line));
1313 }
1314
1315 void User::SendText(const std::string &LinePrefix, std::stringstream &TextStream)
1316 {
1317         char line[MAXBUF];
1318         int start_pos = LinePrefix.length();
1319         int pos = start_pos;
1320         memcpy(line, LinePrefix.data(), pos);
1321         std::string Word;
1322         while (TextStream >> Word)
1323         {
1324                 int len = Word.length();
1325                 if (pos + len + 12 > MAXBUF)
1326                 {
1327                         line[pos] = '\0';
1328                         SendText(std::string(line));
1329                         pos = start_pos;
1330                 }
1331                 line[pos] = ' ';
1332                 memcpy(line + pos + 1, Word.data(), len);
1333                 pos += len + 1;
1334         }
1335         line[pos] = '\0';
1336         SendText(std::string(line));
1337 }
1338
1339 /* return 0 or 1 depending if users u and u2 share one or more common channels
1340  * (used by QUIT, NICK etc which arent channel specific notices)
1341  *
1342  * The old algorithm in 1.0 for this was relatively inefficient, iterating over
1343  * the first users channels then the second users channels within the outer loop,
1344  * therefore it was a maximum of x*y iterations (upon returning 0 and checking
1345  * all possible iterations). However this new function instead checks against the
1346  * channel's userlist in the inner loop which is a std::map<User*,User*>
1347  * and saves us time as we already know what pointer value we are after.
1348  * Don't quote me on the maths as i am not a mathematician or computer scientist,
1349  * but i believe this algorithm is now x+(log y) maximum iterations instead.
1350  */
1351 bool User::SharesChannelWith(User *other)
1352 {
1353         if ((!other) || (this->registered != REG_ALL) || (other->registered != REG_ALL))
1354                 return false;
1355
1356         /* Outer loop */
1357         for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1358         {
1359                 /* Eliminate the inner loop (which used to be ~equal in size to the outer loop)
1360                  * by replacing it with a map::find which *should* be more efficient
1361                  */
1362                 if ((*i)->HasUser(other))
1363                         return true;
1364         }
1365         return false;
1366 }
1367
1368 bool User::ChangeName(const char* gecos)
1369 {
1370         if (!this->fullname.compare(gecos))
1371                 return true;
1372
1373         if (IS_LOCAL(this))
1374         {
1375                 ModResult MOD_RESULT;
1376                 FIRST_MOD_RESULT(OnChangeLocalUserGECOS, MOD_RESULT, (IS_LOCAL(this),gecos));
1377                 if (MOD_RESULT == MOD_RES_DENY)
1378                         return false;
1379                 FOREACH_MOD(I_OnChangeName,OnChangeName(this,gecos));
1380         }
1381         this->fullname.assign(gecos, 0, ServerInstance->Config->Limits.MaxGecos);
1382
1383         return true;
1384 }
1385
1386 void User::DoHostCycle(const std::string &quitline)
1387 {
1388         char buffer[MAXBUF];
1389
1390         if (!ServerInstance->Config->CycleHosts)
1391                 return;
1392
1393         already_sent_t silent_id = ++LocalUser::already_sent_id;
1394         already_sent_t seen_id = ++LocalUser::already_sent_id;
1395
1396         UserChanList include_c(chans);
1397         std::map<User*,bool> exceptions;
1398
1399         FOREACH_MOD(I_OnBuildNeighborList,OnBuildNeighborList(this, include_c, exceptions));
1400
1401         for (std::map<User*,bool>::iterator i = exceptions.begin(); i != exceptions.end(); ++i)
1402         {
1403                 LocalUser* u = IS_LOCAL(i->first);
1404                 if (u && !u->quitting)
1405                 {
1406                         if (i->second)
1407                         {
1408                                 u->already_sent = seen_id;
1409                                 u->Write(quitline);
1410                         }
1411                         else
1412                         {
1413                                 u->already_sent = silent_id;
1414                         }
1415                 }
1416         }
1417         for (UCListIter v = include_c.begin(); v != include_c.end(); ++v)
1418         {
1419                 Channel* c = *v;
1420                 snprintf(buffer, MAXBUF, ":%s JOIN %s", GetFullHost().c_str(), c->name.c_str());
1421                 std::string joinline(buffer);
1422                 Membership* memb = c->GetUser(this);
1423                 std::string modeline = memb->modes;
1424                 if (modeline.length() > 0)
1425                 {
1426                         for(unsigned int i=0; i < memb->modes.length(); i++)
1427                                 modeline.append(" ").append(nick);
1428                         snprintf(buffer, MAXBUF, ":%s MODE %s +%s",
1429                                 ServerInstance->Config->CycleHostsFromUser ? GetFullHost().c_str() : ServerInstance->Config->ServerName.c_str(),
1430                                 c->name.c_str(), modeline.c_str());
1431                         modeline = buffer;
1432                 }
1433
1434                 const UserMembList *ulist = c->GetUsers();
1435                 for (UserMembList::const_iterator i = ulist->begin(); i != ulist->end(); i++)
1436                 {
1437                         LocalUser* u = IS_LOCAL(i->first);
1438                         if (u == NULL || u == this)
1439                                 continue;
1440                         if (u->already_sent == silent_id)
1441                                 continue;
1442
1443                         if (u->already_sent != seen_id)
1444                         {
1445                                 u->Write(quitline);
1446                                 u->already_sent = seen_id;
1447                         }
1448                         u->Write(joinline);
1449                         if (modeline.length() > 0)
1450                                 u->Write(modeline);
1451                 }
1452         }
1453 }
1454
1455 bool User::ChangeDisplayedHost(const char* shost)
1456 {
1457         if (dhost == shost)
1458                 return true;
1459
1460         if (IS_LOCAL(this))
1461         {
1462                 ModResult MOD_RESULT;
1463                 FIRST_MOD_RESULT(OnChangeLocalUserHost, MOD_RESULT, (IS_LOCAL(this),shost));
1464                 if (MOD_RESULT == MOD_RES_DENY)
1465                         return false;
1466         }
1467
1468         FOREACH_MOD(I_OnChangeHost, OnChangeHost(this,shost));
1469
1470         std::string quitstr = ":" + GetFullHost() + " QUIT :Changing host";
1471
1472         /* Fix by Om: User::dhost is 65 long, this was truncating some long hosts */
1473         this->dhost.assign(shost, 0, 64);
1474
1475         this->InvalidateCache();
1476
1477         this->DoHostCycle(quitstr);
1478
1479         if (IS_LOCAL(this))
1480                 this->WriteNumeric(RPL_YOURDISPLAYEDHOST, "%s %s :is now your displayed host",this->nick.c_str(),this->dhost.c_str());
1481
1482         return true;
1483 }
1484
1485 bool User::ChangeIdent(const char* newident)
1486 {
1487         if (this->ident == newident)
1488                 return true;
1489
1490         FOREACH_MOD(I_OnChangeIdent, OnChangeIdent(this,newident));
1491
1492         std::string quitstr = ":" + GetFullHost() + " QUIT :Changing ident";
1493
1494         this->ident.assign(newident, 0, ServerInstance->Config->Limits.IdentMax + 1);
1495
1496         this->InvalidateCache();
1497
1498         this->DoHostCycle(quitstr);
1499
1500         return true;
1501 }
1502
1503 void User::SendAll(const char* command, const char* text, ...)
1504 {
1505         char textbuffer[MAXBUF];
1506         char formatbuffer[MAXBUF];
1507         va_list argsPtr;
1508
1509         va_start(argsPtr, text);
1510         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1511         va_end(argsPtr);
1512
1513         snprintf(formatbuffer,MAXBUF,":%s %s $* :%s", this->GetFullHost().c_str(), command, textbuffer);
1514         std::string fmt = formatbuffer;
1515
1516         for (std::vector<LocalUser*>::const_iterator i = ServerInstance->Users->local_users.begin(); i != ServerInstance->Users->local_users.end(); i++)
1517         {
1518                 (*i)->Write(fmt);
1519         }
1520 }
1521
1522
1523 std::string User::ChannelList(User* source, bool spy)
1524 {
1525         std::string list;
1526
1527         for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1528         {
1529                 Channel* c = *i;
1530                 /* If the target is the sender, neither +p nor +s is set, or
1531                  * the channel contains the user, it is not a spy channel
1532                  */
1533                 if (spy != (source == this || !(c->IsModeSet('p') || c->IsModeSet('s')) || c->HasUser(source)))
1534                         list.append(c->GetPrefixChar(this)).append(c->name).append(" ");
1535         }
1536
1537         return list;
1538 }
1539
1540 void User::SplitChanList(User* dest, const std::string &cl)
1541 {
1542         std::string line;
1543         std::ostringstream prefix;
1544         std::string::size_type start, pos, length;
1545
1546         prefix << this->nick << " " << dest->nick << " :";
1547         line = prefix.str();
1548         int namelen = ServerInstance->Config->ServerName.length() + 6;
1549
1550         for (start = 0; (pos = cl.find(' ', start)) != std::string::npos; start = pos+1)
1551         {
1552                 length = (pos == std::string::npos) ? cl.length() : pos;
1553
1554                 if (line.length() + namelen + length - start > 510)
1555                 {
1556                         ServerInstance->SendWhoisLine(this, dest, 319, "%s", line.c_str());
1557                         line = prefix.str();
1558                 }
1559
1560                 if(pos == std::string::npos)
1561                 {
1562                         line.append(cl.substr(start, length - start));
1563                         break;
1564                 }
1565                 else
1566                 {
1567                         line.append(cl.substr(start, length - start + 1));
1568                 }
1569         }
1570
1571         if (line.length() != prefix.str().length())
1572         {
1573                 ServerInstance->SendWhoisLine(this, dest, 319, "%s", line.c_str());
1574         }
1575 }
1576
1577 /*
1578  * Sets a user's connection class.
1579  * If the class name is provided, it will be used. Otherwise, the class will be guessed using host/ip/ident/etc.
1580  * NOTE: If the <ALLOW> or <DENY> tag specifies an ip, and this user resolves,
1581  * then their ip will be taken as 'priority' anyway, so for example,
1582  * <connect allow="127.0.0.1"> will match joe!bloggs@localhost
1583  */
1584 void LocalUser::SetClass(const std::string &explicit_name)
1585 {
1586         ConnectClass *found = NULL;
1587
1588         ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Setting connect class for UID %s", this->uuid.c_str());
1589
1590         if (!explicit_name.empty())
1591         {
1592                 for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++)
1593                 {
1594                         ConnectClass* c = *i;
1595
1596                         if (explicit_name == c->name)
1597                         {
1598                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Explicitly set to %s", explicit_name.c_str());
1599                                 found = c;
1600                         }
1601                 }
1602         }
1603         else
1604         {
1605                 for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++)
1606                 {
1607                         ConnectClass* c = *i;
1608                         ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Checking %s", c->GetName().c_str());
1609
1610                         ModResult MOD_RESULT;
1611                         FIRST_MOD_RESULT(OnSetConnectClass, MOD_RESULT, (this,c));
1612                         if (MOD_RESULT == MOD_RES_DENY)
1613                                 continue;
1614                         if (MOD_RESULT == MOD_RES_ALLOW)
1615                         {
1616                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Class forced by module to %s", c->GetName().c_str());
1617                                 found = c;
1618                                 break;
1619                         }
1620
1621                         if (c->type == CC_NAMED)
1622                                 continue;
1623
1624                         bool regdone = (registered != REG_NONE);
1625                         if (c->config->getBool("registered", regdone) != regdone)
1626                                 continue;
1627
1628                         /* check if host matches.. */
1629                         if (!InspIRCd::MatchCIDR(this->GetIPString(), c->GetHost(), NULL) &&
1630                             !InspIRCd::MatchCIDR(this->host, c->GetHost(), NULL))
1631                         {
1632                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "No host match (for %s)", c->GetHost().c_str());
1633                                 continue;
1634                         }
1635
1636                         /*
1637                          * deny change if change will take class over the limit check it HERE, not after we found a matching class,
1638                          * because we should attempt to find another class if this one doesn't match us. -- w00t
1639                          */
1640                         if (c->limit && (c->GetReferenceCount() >= c->limit))
1641                         {
1642                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "OOPS: Connect class limit (%lu) hit, denying", c->limit);
1643                                 continue;
1644                         }
1645
1646                         /* if it requires a port ... */
1647                         int port = c->config->getInt("port");
1648                         if (port)
1649                         {
1650                                 ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Requires port (%d)", port);
1651
1652                                 /* and our port doesn't match, fail. */
1653                                 if (this->GetServerPort() != port)
1654                                         continue;
1655                         }
1656
1657                         if (regdone && !c->config->getString("password").empty())
1658                         {
1659                                 if (ServerInstance->PassCompare(this, c->config->getString("password"), password, c->config->getString("hash")))
1660                                 {
1661                                         ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Bad password, skipping");
1662                                         continue;
1663                                 }
1664                         }
1665
1666                         /* we stop at the first class that meets ALL critera. */
1667                         found = c;
1668                         break;
1669                 }
1670         }
1671
1672         /*
1673          * Okay, assuming we found a class that matches.. switch us into that class, keeping refcounts up to date.
1674          */
1675         if (found)
1676         {
1677                 MyClass = found;
1678         }
1679 }
1680
1681 /* looks up a users password for their connection class (<ALLOW>/<DENY> tags)
1682  * NOTE: If the <ALLOW> or <DENY> tag specifies an ip, and this user resolves,
1683  * then their ip will be taken as 'priority' anyway, so for example,
1684  * <connect allow="127.0.0.1"> will match joe!bloggs@localhost
1685  */
1686 ConnectClass* LocalUser::GetClass()
1687 {
1688         return MyClass;
1689 }
1690
1691 ConnectClass* User::GetClass()
1692 {
1693         return NULL;
1694 }
1695
1696 void User::PurgeEmptyChannels()
1697 {
1698         // firstly decrement the count on each channel
1699         for (UCListIter f = this->chans.begin(); f != this->chans.end(); f++)
1700         {
1701                 Channel* c = *f;
1702                 c->DelUser(this);
1703         }
1704
1705         this->UnOper();
1706 }
1707
1708 const std::string& FakeUser::GetFullHost()
1709 {
1710         if (!ServerInstance->Config->HideWhoisServer.empty())
1711                 return ServerInstance->Config->HideWhoisServer;
1712         return server;
1713 }
1714
1715 const std::string& FakeUser::GetFullRealHost()
1716 {
1717         if (!ServerInstance->Config->HideWhoisServer.empty())
1718                 return ServerInstance->Config->HideWhoisServer;
1719         return server;
1720 }
1721
1722 ConnectClass::ConnectClass(ConfigTag* tag, char t, const std::string& mask)
1723         : config(tag), type(t), fakelag(true), name("unnamed"), registration_timeout(0), host(mask),
1724         pingtime(0), softsendqmax(0), hardsendqmax(0), recvqmax(0),
1725         penaltythreshold(0), commandrate(0), maxlocal(0), maxglobal(0), maxconnwarn(true), maxchans(0), limit(0)
1726 {
1727 }
1728
1729 ConnectClass::ConnectClass(ConfigTag* tag, char t, const std::string& mask, const ConnectClass& parent)
1730         : config(tag), type(t), fakelag(parent.fakelag), name("unnamed"),
1731         registration_timeout(parent.registration_timeout), host(mask), pingtime(parent.pingtime),
1732         softsendqmax(parent.softsendqmax), hardsendqmax(parent.hardsendqmax), recvqmax(parent.recvqmax),
1733         penaltythreshold(parent.penaltythreshold), commandrate(parent.commandrate),
1734         maxlocal(parent.maxlocal), maxglobal(parent.maxglobal), maxconnwarn(parent.maxconnwarn), maxchans(parent.maxchans),
1735         limit(parent.limit)
1736 {
1737 }
1738
1739 void ConnectClass::Update(const ConnectClass* src)
1740 {
1741         config = src->config;
1742         type = src->type;
1743         fakelag = src->fakelag;
1744         name = src->name;
1745         registration_timeout = src->registration_timeout;
1746         host = src->host;
1747         pingtime = src->pingtime;
1748         softsendqmax = src->softsendqmax;
1749         hardsendqmax = src->hardsendqmax;
1750         recvqmax = src->recvqmax;
1751         penaltythreshold = src->penaltythreshold;
1752         commandrate = src->commandrate;
1753         maxlocal = src->maxlocal;
1754         maxglobal = src->maxglobal;
1755         maxconnwarn = src->maxconnwarn;
1756         maxchans = src->maxchans;
1757         limit = src->limit;
1758 }