]> git.netwichtig.de Git - user/henk/code/inspircd.git/blob - users.cpp
7f56994d4e8fb4d8c19aedf73ad644999551a620
[user/henk/code/inspircd.git] / 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 "xline.h"
28
29 bool User::IsNoticeMaskSet(unsigned char sm)
30 {
31         if (!isalpha(sm))
32                 return false;
33         return (snomasks[sm-65]);
34 }
35
36 bool User::IsModeSet(unsigned char m) const
37 {
38         ModeHandler* mh = ServerInstance->Modes->FindMode(m, MODETYPE_USER);
39         return (mh && modes[mh->GetId()]);
40 }
41
42 std::string User::GetModeLetters(bool includeparams) const
43 {
44         std::string ret(1, '+');
45         std::string params;
46
47         for (unsigned char i = 'A'; i < 'z'; i++)
48         {
49                 const ModeHandler* const mh = ServerInstance->Modes.FindMode(i, MODETYPE_USER);
50                 if ((!mh) || (!IsModeSet(mh)))
51                         continue;
52
53                 ret.push_back(mh->GetModeChar());
54                 if ((includeparams) && (mh->NeedsParam(true)))
55                 {
56                         const std::string val = mh->GetUserParameter(this);
57                         if (!val.empty())
58                                 params.append(1, ' ').append(val);
59                 }
60         }
61
62         ret += params;
63         return ret;
64 }
65
66 User::User(const std::string& uid, Server* srv, UserType type)
67         : age(ServerInstance->Time())
68         , signon(0)
69         , uuid(uid)
70         , server(srv)
71         , registered(REG_NONE)
72         , quitting(false)
73         , usertype(type)
74 {
75         client_sa.sa.sa_family = AF_UNSPEC;
76
77         ServerInstance->Logs->Log("USERS", LOG_DEBUG, "New UUID for user: %s", uuid.c_str());
78
79         // Do not insert FakeUsers into the uuidlist so FindUUID() won't return them which is the desired behavior
80         if (type != USERTYPE_SERVER)
81         {
82                 if (!ServerInstance->Users.uuidlist.insert(std::make_pair(uuid, this)).second)
83                         throw CoreException("Duplicate UUID in User constructor: " + uuid);
84         }
85 }
86
87 LocalUser::LocalUser(int myfd, irc::sockets::sockaddrs* client, irc::sockets::sockaddrs* servaddr)
88         : User(ServerInstance->UIDGen.GetUID(), ServerInstance->FakeClient->server, USERTYPE_LOCAL)
89         , eh(this)
90         , bytes_in(0)
91         , bytes_out(0)
92         , cmds_in(0)
93         , cmds_out(0)
94         , quitting_sendq(false)
95         , lastping(true)
96         , exempt(false)
97         , nping(0)
98         , idle_lastmsg(0)
99         , CommandFloodPenalty(0)
100         , already_sent(0)
101 {
102         signon = ServerInstance->Time();
103         // The user's default nick is their UUID
104         nick = uuid;
105         ident = "unknown";
106         eh.SetFd(myfd);
107         memcpy(&client_sa, client, sizeof(irc::sockets::sockaddrs));
108         memcpy(&server_sa, servaddr, sizeof(irc::sockets::sockaddrs));
109         ChangeRealHost(GetIPString(), true);
110 }
111
112 User::~User()
113 {
114 }
115
116 const std::string& User::MakeHost()
117 {
118         if (!this->cached_makehost.empty())
119                 return this->cached_makehost;
120
121         // XXX: Is there really a need to cache this?
122         this->cached_makehost = ident + "@" + GetRealHost();
123         return this->cached_makehost;
124 }
125
126 const std::string& User::MakeHostIP()
127 {
128         if (!this->cached_hostip.empty())
129                 return this->cached_hostip;
130
131         // XXX: Is there really a need to cache this?
132         this->cached_hostip = ident + "@" + this->GetIPString();
133         return this->cached_hostip;
134 }
135
136 const std::string& User::GetFullHost()
137 {
138         if (!this->cached_fullhost.empty())
139                 return this->cached_fullhost;
140
141         // XXX: Is there really a need to cache this?
142         this->cached_fullhost = nick + "!" + ident + "@" + GetDisplayedHost();
143         return this->cached_fullhost;
144 }
145
146 const std::string& User::GetFullRealHost()
147 {
148         if (!this->cached_fullrealhost.empty())
149                 return this->cached_fullrealhost;
150
151         // XXX: Is there really a need to cache this?
152         this->cached_fullrealhost = nick + "!" + ident + "@" + GetRealHost();
153         return this->cached_fullrealhost;
154 }
155
156 bool User::HasModePermission(const ModeHandler* mh) const
157 {
158         return true;
159 }
160
161 bool LocalUser::HasModePermission(const ModeHandler* mh) const
162 {
163         if (!this->IsOper())
164                 return false;
165
166         const unsigned char mode = mh->GetModeChar();
167         if (mode < 'A' || mode > ('A' + 64)) return false;
168
169         return ((mh->GetModeType() == MODETYPE_USER ? oper->AllowedUserModes : oper->AllowedChanModes))[(mode - 'A')];
170
171 }
172 /*
173  * users on remote servers can completely bypass all permissions based checks.
174  * This prevents desyncs when one server has different type/class tags to another.
175  * That having been said, this does open things up to the possibility of source changes
176  * allowing remote kills, etc - but if they have access to the src, they most likely have
177  * access to the conf - so it's an end to a means either way.
178  */
179 bool User::HasPermission(const std::string&)
180 {
181         return true;
182 }
183
184 bool LocalUser::HasPermission(const std::string &command)
185 {
186         // are they even an oper at all?
187         if (!this->IsOper())
188         {
189                 return false;
190         }
191
192         return oper->AllowedOperCommands.Contains(command);
193 }
194
195 bool User::HasPrivPermission(const std::string &privstr, bool noisy)
196 {
197         return true;
198 }
199
200 bool LocalUser::HasPrivPermission(const std::string &privstr, bool noisy)
201 {
202         if (!this->IsOper())
203         {
204                 if (noisy)
205                         this->WriteNotice("You are not an oper");
206                 return false;
207         }
208
209         if (oper->AllowedPrivs.Contains(privstr))
210                 return true;
211
212         if (noisy)
213                 this->WriteNotice("Oper type " + oper->name + " does not have access to priv " + privstr);
214
215         return false;
216 }
217
218 void UserIOHandler::OnDataReady()
219 {
220         if (user->quitting)
221                 return;
222
223         if (recvq.length() > user->MyClass->GetRecvqMax() && !user->HasPrivPermission("users/flood/increased-buffers"))
224         {
225                 ServerInstance->Users->QuitUser(user, "RecvQ exceeded");
226                 ServerInstance->SNO->WriteToSnoMask('a', "User %s RecvQ of %lu exceeds connect class maximum of %lu",
227                         user->nick.c_str(), (unsigned long)recvq.length(), user->MyClass->GetRecvqMax());
228                 return;
229         }
230
231         unsigned long sendqmax = ULONG_MAX;
232         if (!user->HasPrivPermission("users/flood/increased-buffers"))
233                 sendqmax = user->MyClass->GetSendqSoftMax();
234
235         unsigned long penaltymax = ULONG_MAX;
236         if (!user->HasPrivPermission("users/flood/no-fakelag"))
237                 penaltymax = user->MyClass->GetPenaltyThreshold() * 1000;
238
239         // The maximum size of an IRC message minus the terminating CR+LF.
240         const size_t maxmessage = ServerInstance->Config->Limits.MaxLine - 2;
241         std::string line;
242         line.reserve(maxmessage);
243
244         bool eol_found;
245         std::string::size_type qpos;
246
247         while (user->CommandFloodPenalty < penaltymax && getSendQSize() < sendqmax)
248         {
249                 qpos = 0;
250                 eol_found = false;
251
252                 const size_t qlen = recvq.length();
253                 while (qpos < qlen)
254                 {
255                         char c = recvq[qpos++];
256                         switch (c)
257                         {
258                                 case '\0':
259                                         c = ' ';
260                                         break;
261                                 case '\r':
262                                         continue;
263                                 case '\n':
264                                         eol_found = true;
265                                         break;
266                         }
267
268                         if (eol_found)
269                                 break;
270
271                         if (line.length() < maxmessage)
272                                 line.push_back(c);
273                 }
274
275                 // if we return here, we haven't found a newline and make no modifications to recvq
276                 // so we can wait for more data
277                 if (!eol_found)
278                         return;
279
280                 // just found a newline. Terminate the string, and pull it out of recvq
281                 recvq.erase(0, qpos);
282
283                 // TODO should this be moved to when it was inserted in recvq?
284                 ServerInstance->stats.Recv += qpos;
285                 user->bytes_in += qpos;
286                 user->cmds_in++;
287
288                 ServerInstance->Parser.ProcessBuffer(line, user);
289                 if (user->quitting)
290                         return;
291
292                 // clear() does not reclaim memory associated with the string, so our .reserve() call is safe
293                 line.clear();
294         }
295
296         if (user->CommandFloodPenalty >= penaltymax && !user->MyClass->fakelag)
297                 ServerInstance->Users->QuitUser(user, "Excess Flood");
298 }
299
300 void UserIOHandler::AddWriteBuf(const std::string &data)
301 {
302         if (user->quitting_sendq)
303                 return;
304         if (!user->quitting && getSendQSize() + data.length() > user->MyClass->GetSendqHardMax() &&
305                 !user->HasPrivPermission("users/flood/increased-buffers"))
306         {
307                 user->quitting_sendq = true;
308                 ServerInstance->GlobalCulls.AddSQItem(user);
309                 return;
310         }
311
312         // We still want to append data to the sendq of a quitting user,
313         // e.g. their ERROR message that says 'closing link'
314
315         WriteData(data);
316 }
317
318 void UserIOHandler::OnError(BufferedSocketError)
319 {
320         ServerInstance->Users->QuitUser(user, getError());
321 }
322
323 CullResult User::cull()
324 {
325         if (!quitting)
326                 ServerInstance->Users->QuitUser(this, "Culled without QuitUser");
327
328         if (client_sa.sa.sa_family != AF_UNSPEC)
329                 ServerInstance->Users->RemoveCloneCounts(this);
330
331         return Extensible::cull();
332 }
333
334 CullResult LocalUser::cull()
335 {
336         eh.cull();
337         return User::cull();
338 }
339
340 CullResult FakeUser::cull()
341 {
342         // Fake users don't quit, they just get culled.
343         quitting = true;
344         // Fake users are not inserted into UserManager::clientlist or uuidlist, so we don't need to modify those here
345         return User::cull();
346 }
347
348 void User::Oper(OperInfo* info)
349 {
350         ModeHandler* opermh = ServerInstance->Modes->FindMode('o', MODETYPE_USER);
351         if (this->IsModeSet(opermh))
352                 this->UnOper();
353
354         this->SetMode(opermh, true);
355         this->oper = info;
356         this->WriteCommand("MODE", "+o");
357         FOREACH_MOD(OnOper, (this, info->name));
358
359         std::string opername;
360         if (info->oper_block)
361                 opername = info->oper_block->getString("name");
362
363         if (IS_LOCAL(this))
364         {
365                 LocalUser* l = IS_LOCAL(this);
366                 std::string vhost = oper->getConfig("vhost");
367                 if (!vhost.empty())
368                         l->ChangeDisplayedHost(vhost);
369                 std::string opClass = oper->getConfig("class");
370                 if (!opClass.empty())
371                         l->SetClass(opClass);
372         }
373
374         ServerInstance->SNO->WriteToSnoMask('o',"%s (%s@%s) is now an IRC operator of type %s (using oper '%s')",
375                 nick.c_str(), ident.c_str(), GetRealHost().c_str(), oper->name.c_str(), opername.c_str());
376         this->WriteNumeric(RPL_YOUAREOPER, InspIRCd::Format("You are now %s %s", strchr("aeiouAEIOU", oper->name[0]) ? "an" : "a", oper->name.c_str()));
377
378         ServerInstance->Logs->Log("OPER", LOG_DEFAULT, "%s opered as type: %s", GetFullRealHost().c_str(), oper->name.c_str());
379         ServerInstance->Users->all_opers.push_back(this);
380
381         // Expand permissions from config for faster lookup
382         if (IS_LOCAL(this))
383                 oper->init();
384
385         FOREACH_MOD(OnPostOper, (this, oper->name, opername));
386 }
387
388 void OperInfo::init()
389 {
390         AllowedOperCommands.Clear();
391         AllowedPrivs.Clear();
392         AllowedUserModes.reset();
393         AllowedChanModes.reset();
394         AllowedUserModes['o' - 'A'] = true; // Call me paranoid if you want.
395
396         for(std::vector<reference<ConfigTag> >::iterator iter = class_blocks.begin(); iter != class_blocks.end(); ++iter)
397         {
398                 ConfigTag* tag = *iter;
399
400                 AllowedOperCommands.AddList(tag->getString("commands"));
401                 AllowedPrivs.AddList(tag->getString("privs"));
402
403                 std::string modes = tag->getString("usermodes");
404                 for (std::string::const_iterator c = modes.begin(); c != modes.end(); ++c)
405                 {
406                         if (*c == '*')
407                         {
408                                 this->AllowedUserModes.set();
409                         }
410                         else if (*c >= 'A' && *c <= 'z')
411                         {
412                                 this->AllowedUserModes[*c - 'A'] = true;
413                         }
414                 }
415
416                 modes = tag->getString("chanmodes");
417                 for (std::string::const_iterator c = modes.begin(); c != modes.end(); ++c)
418                 {
419                         if (*c == '*')
420                         {
421                                 this->AllowedChanModes.set();
422                         }
423                         else if (*c >= 'A' && *c <= 'z')
424                         {
425                                 this->AllowedChanModes[*c - 'A'] = true;
426                         }
427                 }
428         }
429 }
430
431 void User::UnOper()
432 {
433         if (!this->IsOper())
434                 return;
435
436         /*
437          * unset their oper type (what IS_OPER checks).
438          * note, order is important - this must come before modes as -o attempts
439          * to call UnOper. -- w00t
440          */
441         oper = NULL;
442
443
444         /* Remove all oper only modes from the user when the deoper - Bug #466*/
445         Modes::ChangeList changelist;
446         const ModeParser::ModeHandlerMap& usermodes = ServerInstance->Modes->GetModes(MODETYPE_USER);
447         for (ModeParser::ModeHandlerMap::const_iterator i = usermodes.begin(); i != usermodes.end(); ++i)
448         {
449                 ModeHandler* mh = i->second;
450                 if (mh->NeedsOper())
451                         changelist.push_remove(mh);
452         }
453
454         ServerInstance->Modes->Process(this, NULL, this, changelist);
455
456         // Remove the user from the oper list
457         stdalgo::vector::swaperase(ServerInstance->Users->all_opers, this);
458
459         ModeHandler* opermh = ServerInstance->Modes->FindMode('o', MODETYPE_USER);
460         this->SetMode(opermh, false);
461 }
462
463 /*
464  * Check class restrictions
465  */
466 void LocalUser::CheckClass(bool clone_count)
467 {
468         ConnectClass* a = this->MyClass;
469
470         if (!a)
471         {
472                 ServerInstance->Users->QuitUser(this, "Access denied by configuration");
473                 return;
474         }
475         else if (a->type == CC_DENY)
476         {
477                 ServerInstance->Users->QuitUser(this, a->config->getString("reason", "Unauthorised connection"));
478                 return;
479         }
480         else if (clone_count)
481         {
482                 const UserManager::CloneCounts& clonecounts = ServerInstance->Users->GetCloneCounts(this);
483                 if ((a->GetMaxLocal()) && (clonecounts.local > a->GetMaxLocal()))
484                 {
485                         ServerInstance->Users->QuitUser(this, "No more connections allowed from your host via this connect class (local)");
486                         if (a->maxconnwarn)
487                                 ServerInstance->SNO->WriteToSnoMask('a', "WARNING: maximum LOCAL connections (%ld) exceeded for IP %s", a->GetMaxLocal(), this->GetIPString().c_str());
488                         return;
489                 }
490                 else if ((a->GetMaxGlobal()) && (clonecounts.global > a->GetMaxGlobal()))
491                 {
492                         ServerInstance->Users->QuitUser(this, "No more connections allowed from your host via this connect class (global)");
493                         if (a->maxconnwarn)
494                                 ServerInstance->SNO->WriteToSnoMask('a', "WARNING: maximum GLOBAL connections (%ld) exceeded for IP %s", a->GetMaxGlobal(), this->GetIPString().c_str());
495                         return;
496                 }
497         }
498
499         this->nping = ServerInstance->Time() + a->GetPingTime();
500 }
501
502 bool LocalUser::CheckLines(bool doZline)
503 {
504         const char* check[] = { "G" , "K", (doZline) ? "Z" : NULL, NULL };
505
506         if (!this->exempt)
507         {
508                 for (int n = 0; check[n]; ++n)
509                 {
510                         XLine *r = ServerInstance->XLines->MatchesLine(check[n], this);
511
512                         if (r)
513                         {
514                                 r->Apply(this);
515                                 return true;
516                         }
517                 }
518         }
519
520         return false;
521 }
522
523 void LocalUser::FullConnect()
524 {
525         ServerInstance->stats.Connects++;
526         this->idle_lastmsg = ServerInstance->Time();
527
528         /*
529          * You may be thinking "wtf, we checked this in User::AddClient!" - and yes, we did, BUT.
530          * At the time AddClient is called, we don't have a resolved host, by here we probably do - which
531          * may put the user into a totally seperate class with different restrictions! so we *must* check again.
532          * Don't remove this! -- w00t
533          */
534         MyClass = NULL;
535         SetClass();
536         CheckClass();
537         CheckLines();
538
539         if (quitting)
540                 return;
541
542         this->WriteNumeric(RPL_WELCOME, InspIRCd::Format("Welcome to the %s IRC Network %s", ServerInstance->Config->Network.c_str(), GetFullRealHost().c_str()));
543         this->WriteNumeric(RPL_YOURHOSTIS, InspIRCd::Format("Your host is %s, running version %s", ServerInstance->Config->ServerName.c_str(), INSPIRCD_BRANCH));
544         this->WriteNumeric(RPL_SERVERCREATED, InspIRCd::TimeString(ServerInstance->startup_time, "This server was created %H:%M:%S %b %d %Y"));
545
546         const TR1NS::array<std::string, 3>& modelist = ServerInstance->Modes->GetModeListFor004Numeric();
547         this->WriteNumeric(RPL_SERVERVERSION, ServerInstance->Config->ServerName, INSPIRCD_BRANCH, modelist[0], modelist[1], modelist[2]);
548
549         ServerInstance->ISupport.SendTo(this);
550
551         /* Now registered */
552         if (ServerInstance->Users->unregistered_count)
553                 ServerInstance->Users->unregistered_count--;
554
555         /* Trigger MOTD and LUSERS output, give modules a chance too */
556         ModResult MOD_RESULT;
557         std::string command("LUSERS");
558         std::vector<std::string> parameters;
559         FIRST_MOD_RESULT(OnPreCommand, MOD_RESULT, (command, parameters, this, true, command));
560         if (!MOD_RESULT)
561                 ServerInstance->Parser.CallHandler(command, parameters, this);
562
563         MOD_RESULT = MOD_RES_PASSTHRU;
564         command = "MOTD";
565         FIRST_MOD_RESULT(OnPreCommand, MOD_RESULT, (command, parameters, this, true, command));
566         if (!MOD_RESULT)
567                 ServerInstance->Parser.CallHandler(command, parameters, this);
568
569         if (ServerInstance->Config->RawLog)
570                 WriteServ("PRIVMSG %s :*** Raw I/O logging is enabled on this server. All messages, passwords, and commands are being recorded.", nick.c_str());
571
572         /*
573          * We don't set REG_ALL until triggering OnUserConnect, so some module events don't spew out stuff
574          * for a user that doesn't exist yet.
575          */
576         FOREACH_MOD(OnUserConnect, (this));
577
578         this->registered = REG_ALL;
579
580         FOREACH_MOD(OnPostConnect, (this));
581
582         ServerInstance->SNO->WriteToSnoMask('c',"Client connecting on port %d (class %s): %s (%s) [%s]",
583                 this->GetServerPort(), this->MyClass->name.c_str(), GetFullRealHost().c_str(), this->GetIPString().c_str(), this->fullname.c_str());
584         ServerInstance->Logs->Log("BANCACHE", LOG_DEBUG, "BanCache: Adding NEGATIVE hit for " + this->GetIPString());
585         ServerInstance->BanCache.AddHit(this->GetIPString(), "", "");
586         // reset the flood penalty (which could have been raised due to things like auto +x)
587         CommandFloodPenalty = 0;
588 }
589
590 void User::InvalidateCache()
591 {
592         /* Invalidate cache */
593         cachedip.clear();
594         cached_fullhost.clear();
595         cached_hostip.clear();
596         cached_makehost.clear();
597         cached_fullrealhost.clear();
598 }
599
600 bool User::ChangeNick(const std::string& newnick, time_t newts)
601 {
602         if (quitting)
603         {
604                 ServerInstance->Logs->Log("USERS", LOG_DEFAULT, "ERROR: Attempted to change nick of a quitting user: " + this->nick);
605                 return false;
606         }
607
608         User* const InUse = ServerInstance->FindNickOnly(newnick);
609         if (InUse == this)
610         {
611                 // case change, don't need to check campers
612                 // and, if it's identical including case, we can leave right now
613                 // We also don't update the nick TS if it's a case change, either
614                 if (newnick == nick)
615                         return true;
616         }
617         else
618         {
619                 /*
620                  * Uh oh.. if the nickname is in use, and it's not in use by the person using it (doh) --
621                  * then we have a potential collide. Check whether someone else is camping on the nick
622                  * (i.e. connect -> send NICK, don't send USER.) If they are camping, force-change the
623                  * camper to their UID, and allow the incoming nick change.
624                  *
625                  * If the guy using the nick is already using it, tell the incoming nick change to gtfo,
626                  * because the nick is already (rightfully) in use. -- w00t
627                  */
628                 if (InUse)
629                 {
630                         if (InUse->registered != REG_ALL)
631                         {
632                                 /* force the camper to their UUID, and ask them to re-send a NICK. */
633                                 LocalUser* const localuser = static_cast<LocalUser*>(InUse);
634                                 localuser->OverruleNick();
635                         }
636                         else
637                         {
638                                 /* No camping, tell the incoming user  to stop trying to change nick ;p */
639                                 this->WriteNumeric(ERR_NICKNAMEINUSE, newnick, "Nickname is already in use.");
640                                 return false;
641                         }
642                 }
643
644                 age = newts ? newts : ServerInstance->Time();
645         }
646
647         if (this->registered == REG_ALL)
648                 this->WriteCommon("NICK %s",newnick.c_str());
649         std::string oldnick = nick;
650         nick = newnick;
651
652         InvalidateCache();
653         ServerInstance->Users->clientlist.erase(oldnick);
654         ServerInstance->Users->clientlist[newnick] = this;
655
656         if (registered == REG_ALL)
657                 FOREACH_MOD(OnUserPostNick, (this,oldnick));
658
659         return true;
660 }
661
662 void LocalUser::OverruleNick()
663 {
664         this->WriteFrom(this, "NICK %s", this->uuid.c_str());
665         this->WriteNumeric(ERR_NICKNAMEINUSE, this->nick, "Nickname overruled.");
666
667         // Clear the bit before calling ChangeNick() to make it NOT run the OnUserPostNick() hook
668         this->registered &= ~REG_NICK;
669         this->ChangeNick(this->uuid);
670 }
671
672 int LocalUser::GetServerPort()
673 {
674         return this->server_sa.port();
675 }
676
677 const std::string& User::GetIPString()
678 {
679         if (cachedip.empty())
680         {
681                 cachedip = client_sa.addr();
682                 /* IP addresses starting with a : on irc are a Bad Thing (tm) */
683                 if (cachedip[0] == ':')
684                         cachedip.insert(cachedip.begin(),1,'0');
685         }
686
687         return cachedip;
688 }
689
690 const std::string& User::GetHost(bool uncloak) const
691 {
692         return uncloak ? GetRealHost() : GetDisplayedHost();
693 }
694
695 const std::string& User::GetDisplayedHost() const
696 {
697         return displayhost.empty() ? realhost : displayhost;
698 }
699
700 const std::string& User::GetRealHost() const
701 {
702         return realhost;
703 }
704
705 irc::sockets::cidr_mask User::GetCIDRMask()
706 {
707         unsigned char range = 0;
708         switch (client_sa.sa.sa_family)
709         {
710                 case AF_INET6:
711                         range = ServerInstance->Config->c_ipv6_range;
712                         break;
713                 case AF_INET:
714                         range = ServerInstance->Config->c_ipv4_range;
715                         break;
716         }
717         return irc::sockets::cidr_mask(client_sa, range);
718 }
719
720 bool User::SetClientIP(const std::string& address, bool recheck_eline)
721 {
722         this->InvalidateCache();
723         return irc::sockets::aptosa(address, 0, client_sa);
724 }
725
726 void User::SetClientIP(const irc::sockets::sockaddrs& sa, bool recheck_eline)
727 {
728         this->InvalidateCache();
729         memcpy(&client_sa, &sa, sizeof(irc::sockets::sockaddrs));
730 }
731
732 bool LocalUser::SetClientIP(const std::string& address, bool recheck_eline)
733 {
734         irc::sockets::sockaddrs sa;
735         if (!irc::sockets::aptosa(address, 0, sa))
736                 // Invalid
737                 return false;
738
739         LocalUser::SetClientIP(sa, recheck_eline);
740         return true;
741 }
742
743 void LocalUser::SetClientIP(const irc::sockets::sockaddrs& sa, bool recheck_eline)
744 {
745         if (sa != client_sa)
746         {
747                 User::SetClientIP(sa);
748                 if (recheck_eline)
749                         this->exempt = (ServerInstance->XLines->MatchesLine("E", this) != NULL);
750
751                 FOREACH_MOD(OnSetUserIP, (this));
752         }
753 }
754
755 static std::string wide_newline("\r\n");
756
757 void User::Write(const std::string& text)
758 {
759 }
760
761 void User::Write(const char *text, ...)
762 {
763 }
764
765 void LocalUser::Write(const std::string& text)
766 {
767         if (!SocketEngine::BoundsCheckFd(&eh))
768                 return;
769
770         if (text.length() > ServerInstance->Config->Limits.MaxLine - 2)
771         {
772                 // this should happen rarely or never. Crop the string at 512 and try again.
773                 std::string try_again(text, 0, ServerInstance->Config->Limits.MaxLine - 2);
774                 Write(try_again);
775                 return;
776         }
777
778         ServerInstance->Logs->Log("USEROUTPUT", LOG_RAWIO, "C[%s] O %s", uuid.c_str(), text.c_str());
779
780         eh.AddWriteBuf(text);
781         eh.AddWriteBuf(wide_newline);
782
783         ServerInstance->stats.Sent += text.length() + 2;
784         this->bytes_out += text.length() + 2;
785         this->cmds_out++;
786 }
787
788 /** Write()
789  */
790 void LocalUser::Write(const char *text, ...)
791 {
792         std::string textbuffer;
793         VAFORMAT(textbuffer, text, text);
794         this->Write(textbuffer);
795 }
796
797 void User::WriteServ(const std::string& text)
798 {
799         this->Write(":%s %s",ServerInstance->Config->ServerName.c_str(),text.c_str());
800 }
801
802 /** WriteServ()
803  *  Same as Write(), except `text' is prefixed with `:server.name '.
804  */
805 void User::WriteServ(const char* text, ...)
806 {
807         std::string textbuffer;
808         VAFORMAT(textbuffer, text, text);
809         this->WriteServ(textbuffer);
810 }
811
812 void User::WriteCommand(const char* command, const std::string& text)
813 {
814         this->WriteServ(command + (this->registered & REG_NICK ? " " + this->nick : " *") + " " + text);
815 }
816
817 namespace
818 {
819         std::string BuildNumeric(const std::string& source, User* targetuser, unsigned int num, const std::vector<std::string>& params)
820         {
821                 const char* const target = (targetuser->registered & REG_NICK ? targetuser->nick.c_str() : "*");
822                 std::string raw = InspIRCd::Format(":%s %03u %s", source.c_str(), num, target);
823                 if (!params.empty())
824                 {
825                         for (std::vector<std::string>::const_iterator i = params.begin(); i != params.end()-1; ++i)
826                                 raw.append(1, ' ').append(*i);
827                         raw.append(" :").append(params.back());
828                 }
829                 return raw;
830         }
831 }
832
833 void User::WriteNumeric(const Numeric::Numeric& numeric)
834 {
835         ModResult MOD_RESULT;
836
837         FIRST_MOD_RESULT(OnNumeric, MOD_RESULT, (this, numeric));
838
839         if (MOD_RESULT == MOD_RES_DENY)
840                 return;
841
842         const std::string& servername = (numeric.GetServer() ? numeric.GetServer()->GetName() : ServerInstance->Config->ServerName);
843         this->Write(BuildNumeric(servername, this, numeric.GetNumeric(), numeric.GetParams()));
844 }
845
846 void User::WriteFrom(User *user, const std::string &text)
847 {
848         const std::string message = ":" + user->GetFullHost() + " " + text;
849         this->Write(message);
850 }
851
852
853 /* write text from an originating user to originating user */
854
855 void User::WriteFrom(User *user, const char* text, ...)
856 {
857         std::string textbuffer;
858         VAFORMAT(textbuffer, text, text);
859         this->WriteFrom(user, textbuffer);
860 }
861
862 void User::WriteRemoteNotice(const std::string& text)
863 {
864         ServerInstance->PI->SendUserNotice(this, text);
865 }
866
867 void LocalUser::WriteRemoteNotice(const std::string& text)
868 {
869         WriteNotice(text);
870 }
871
872 namespace
873 {
874         class WriteCommonRawHandler : public User::ForEachNeighborHandler
875         {
876                 const std::string& msg;
877
878                 void Execute(LocalUser* user) CXX11_OVERRIDE
879                 {
880                         user->Write(msg);
881                 }
882
883          public:
884                 WriteCommonRawHandler(const std::string& message)
885                         : msg(message)
886                 {
887                 }
888         };
889 }
890
891 void User::WriteCommon(const char* text, ...)
892 {
893         std::string textbuffer;
894         VAFORMAT(textbuffer, text, text);
895         textbuffer = ":" + this->GetFullHost() + " " + textbuffer;
896         this->WriteCommonRaw(textbuffer, true);
897 }
898
899 void User::WriteCommonRaw(const std::string &line, bool include_self)
900 {
901         WriteCommonRawHandler handler(line);
902         ForEachNeighbor(handler, include_self);
903 }
904
905 void User::ForEachNeighbor(ForEachNeighborHandler& handler, bool include_self)
906 {
907         // The basic logic for visiting the neighbors of a user is to iterate the channel list of the user
908         // and visit all users on those channels. Because two users may share more than one common channel,
909         // we must skip users that we have already visited.
910         // To do this, we make use of a global counter and an integral 'already_sent' field in LocalUser.
911         // The global counter is incremented every time we do something for each neighbor of a user. Then,
912         // before visiting a member we examine user->already_sent. If it's equal to the current counter, we
913         // skip the member. Otherwise, we set it to the current counter and visit the member.
914
915         // Ask modules to build a list of exceptions.
916         // Mods may also exclude entire channels by erasing them from include_chans.
917         IncludeChanList include_chans(chans.begin(), chans.end());
918         std::map<User*, bool> exceptions;
919         exceptions[this] = include_self;
920         FOREACH_MOD(OnBuildNeighborList, (this, include_chans, exceptions));
921
922         // Get next id, guaranteed to differ from the already_sent field of all users
923         const already_sent_t newid = ServerInstance->Users.NextAlreadySentId();
924
925         // Handle exceptions first
926         for (std::map<User*, bool>::const_iterator i = exceptions.begin(); i != exceptions.end(); ++i)
927         {
928                 LocalUser* curr = IS_LOCAL(i->first);
929                 if (curr)
930                 {
931                         // Mark as visited to ensure we won't visit again if there is a common channel
932                         curr->already_sent = newid;
933                         // Always treat quitting users as excluded
934                         if ((i->second) && (!curr->quitting))
935                                 handler.Execute(curr);
936                 }
937         }
938
939         // Now consider the real neighbors
940         for (IncludeChanList::const_iterator i = include_chans.begin(); i != include_chans.end(); ++i)
941         {
942                 Channel* chan = (*i)->chan;
943                 const Channel::MemberMap& userlist = chan->GetUsers();
944                 for (Channel::MemberMap::const_iterator j = userlist.begin(); j != userlist.end(); ++j)
945                 {
946                         LocalUser* curr = IS_LOCAL(j->first);
947                         // User not yet visited?
948                         if ((curr) && (curr->already_sent != newid))
949                         {
950                                 // Mark as visited and execute function
951                                 curr->already_sent = newid;
952                                 handler.Execute(curr);
953                         }
954                 }
955         }
956 }
957
958 void User::WriteRemoteNumeric(const Numeric::Numeric& numeric)
959 {
960         WriteNumeric(numeric);
961 }
962
963 /* return 0 or 1 depending if users u and u2 share one or more common channels
964  * (used by QUIT, NICK etc which arent channel specific notices)
965  *
966  * The old algorithm in 1.0 for this was relatively inefficient, iterating over
967  * the first users channels then the second users channels within the outer loop,
968  * therefore it was a maximum of x*y iterations (upon returning 0 and checking
969  * all possible iterations). However this new function instead checks against the
970  * channel's userlist in the inner loop which is a std::map<User*,User*>
971  * and saves us time as we already know what pointer value we are after.
972  * Don't quote me on the maths as i am not a mathematician or computer scientist,
973  * but i believe this algorithm is now x+(log y) maximum iterations instead.
974  */
975 bool User::SharesChannelWith(User *other)
976 {
977         /* Outer loop */
978         for (User::ChanList::iterator i = this->chans.begin(); i != this->chans.end(); ++i)
979         {
980                 /* Eliminate the inner loop (which used to be ~equal in size to the outer loop)
981                  * by replacing it with a map::find which *should* be more efficient
982                  */
983                 if ((*i)->chan->HasUser(other))
984                         return true;
985         }
986         return false;
987 }
988
989 bool User::ChangeName(const std::string& gecos)
990 {
991         if (!this->fullname.compare(gecos))
992                 return true;
993
994         if (IS_LOCAL(this))
995         {
996                 ModResult MOD_RESULT;
997                 FIRST_MOD_RESULT(OnChangeLocalUserGECOS, MOD_RESULT, (IS_LOCAL(this),gecos));
998                 if (MOD_RESULT == MOD_RES_DENY)
999                         return false;
1000                 FOREACH_MOD(OnChangeName, (this,gecos));
1001         }
1002         this->fullname.assign(gecos, 0, ServerInstance->Config->Limits.MaxGecos);
1003
1004         return true;
1005 }
1006
1007 bool User::ChangeDisplayedHost(const std::string& shost)
1008 {
1009         if (GetDisplayedHost() == shost)
1010                 return true;
1011
1012         if (IS_LOCAL(this))
1013         {
1014                 ModResult MOD_RESULT;
1015                 FIRST_MOD_RESULT(OnChangeLocalUserHost, MOD_RESULT, (IS_LOCAL(this),shost));
1016                 if (MOD_RESULT == MOD_RES_DENY)
1017                         return false;
1018         }
1019
1020         FOREACH_MOD(OnChangeHost, (this,shost));
1021
1022         if (realhost == shost)
1023                 this->displayhost.clear();
1024         else
1025                 this->displayhost.assign(shost, 0, ServerInstance->Config->Limits.MaxHost);
1026
1027         this->InvalidateCache();
1028
1029         if (IS_LOCAL(this))
1030                 this->WriteNumeric(RPL_YOURDISPLAYEDHOST, this->GetDisplayedHost(), "is now your displayed host");
1031
1032         return true;
1033 }
1034
1035 void User::ChangeRealHost(const std::string& host, bool resetdisplay)
1036 {
1037         // If the real host is the new host and we are not resetting the
1038         // display host then we have nothing to do.
1039         const bool changehost = (realhost != host);
1040         if (!changehost && !resetdisplay)
1041                 return;
1042         
1043         // If the displayhost is not set and we are not resetting it then
1044         // we need to copy it to the displayhost field.
1045         if (displayhost.empty() && !resetdisplay)
1046                 displayhost = realhost;
1047
1048         // If the displayhost is the new host or we are resetting it then
1049         // we clear its contents to save memory.
1050         else if (displayhost == host || resetdisplay)
1051                 displayhost.clear();
1052
1053         // If we are just resetting the display host then we don't need to
1054         // do anything else.
1055         if (!changehost)
1056                 return;
1057
1058         realhost = host;
1059         this->InvalidateCache();
1060 }
1061
1062 bool User::ChangeIdent(const std::string& newident)
1063 {
1064         if (this->ident == newident)
1065                 return true;
1066
1067         FOREACH_MOD(OnChangeIdent, (this,newident));
1068
1069         this->ident.assign(newident, 0, ServerInstance->Config->Limits.IdentMax);
1070         this->InvalidateCache();
1071
1072         return true;
1073 }
1074
1075 /*
1076  * Sets a user's connection class.
1077  * If the class name is provided, it will be used. Otherwise, the class will be guessed using host/ip/ident/etc.
1078  * NOTE: If the <ALLOW> or <DENY> tag specifies an ip, and this user resolves,
1079  * then their ip will be taken as 'priority' anyway, so for example,
1080  * <connect allow="127.0.0.1"> will match joe!bloggs@localhost
1081  */
1082 void LocalUser::SetClass(const std::string &explicit_name)
1083 {
1084         ConnectClass *found = NULL;
1085
1086         ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "Setting connect class for UID %s", this->uuid.c_str());
1087
1088         if (!explicit_name.empty())
1089         {
1090                 for (ServerConfig::ClassVector::const_iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); ++i)
1091                 {
1092                         ConnectClass* c = *i;
1093
1094                         if (explicit_name == c->name)
1095                         {
1096                                 ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "Explicitly set to %s", explicit_name.c_str());
1097                                 found = c;
1098                         }
1099                 }
1100         }
1101         else
1102         {
1103                 for (ServerConfig::ClassVector::const_iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); ++i)
1104                 {
1105                         ConnectClass* c = *i;
1106                         ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "Checking %s", c->GetName().c_str());
1107
1108                         ModResult MOD_RESULT;
1109                         FIRST_MOD_RESULT(OnSetConnectClass, MOD_RESULT, (this,c));
1110                         if (MOD_RESULT == MOD_RES_DENY)
1111                                 continue;
1112                         if (MOD_RESULT == MOD_RES_ALLOW)
1113                         {
1114                                 ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "Class forced by module to %s", c->GetName().c_str());
1115                                 found = c;
1116                                 break;
1117                         }
1118
1119                         if (c->type == CC_NAMED)
1120                                 continue;
1121
1122                         bool regdone = (registered != REG_NONE);
1123                         if (c->config->getBool("registered", regdone) != regdone)
1124                                 continue;
1125
1126                         /* check if host matches.. */
1127                         if (!InspIRCd::MatchCIDR(this->GetIPString(), c->GetHost(), NULL) &&
1128                             !InspIRCd::MatchCIDR(this->GetRealHost(), c->GetHost(), NULL))
1129                         {
1130                                 ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "No host match (for %s)", c->GetHost().c_str());
1131                                 continue;
1132                         }
1133
1134                         /*
1135                          * deny change if change will take class over the limit check it HERE, not after we found a matching class,
1136                          * because we should attempt to find another class if this one doesn't match us. -- w00t
1137                          */
1138                         if (c->limit && (c->GetReferenceCount() >= c->limit))
1139                         {
1140                                 ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "OOPS: Connect class limit (%lu) hit, denying", c->limit);
1141                                 continue;
1142                         }
1143
1144                         /* if it requires a port ... */
1145                         if (!c->ports.empty())
1146                         {
1147                                 /* and our port doesn't match, fail. */
1148                                 if (!c->ports.count(this->GetServerPort()))
1149                                 {
1150                                         ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "Requires a different port, skipping");
1151                                         continue;
1152                                 }
1153                         }
1154
1155                         if (regdone && !c->config->getString("password").empty())
1156                         {
1157                                 if (!ServerInstance->PassCompare(this, c->config->getString("password"), password, c->config->getString("hash")))
1158                                 {
1159                                         ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "Bad password, skipping");
1160                                         continue;
1161                                 }
1162                         }
1163
1164                         /* we stop at the first class that meets ALL critera. */
1165                         found = c;
1166                         break;
1167                 }
1168         }
1169
1170         /*
1171          * Okay, assuming we found a class that matches.. switch us into that class, keeping refcounts up to date.
1172          */
1173         if (found)
1174         {
1175                 MyClass = found;
1176         }
1177 }
1178
1179 void User::PurgeEmptyChannels()
1180 {
1181         // firstly decrement the count on each channel
1182         for (User::ChanList::iterator i = this->chans.begin(); i != this->chans.end(); )
1183         {
1184                 Channel* c = (*i)->chan;
1185                 ++i;
1186                 c->DelUser(this);
1187         }
1188
1189         this->UnOper();
1190 }
1191
1192 const std::string& FakeUser::GetFullHost()
1193 {
1194         if (!ServerInstance->Config->HideServer.empty())
1195                 return ServerInstance->Config->HideServer;
1196         return server->GetName();
1197 }
1198
1199 const std::string& FakeUser::GetFullRealHost()
1200 {
1201         if (!ServerInstance->Config->HideServer.empty())
1202                 return ServerInstance->Config->HideServer;
1203         return server->GetName();
1204 }
1205
1206 ConnectClass::ConnectClass(ConfigTag* tag, char t, const std::string& mask)
1207         : config(tag), type(t), fakelag(true), name("unnamed"), registration_timeout(0), host(mask),
1208         pingtime(0), softsendqmax(0), hardsendqmax(0), recvqmax(0),
1209         penaltythreshold(0), commandrate(0), maxlocal(0), maxglobal(0), maxconnwarn(true), maxchans(ServerInstance->Config->MaxChans),
1210         limit(0), resolvehostnames(true)
1211 {
1212 }
1213
1214 ConnectClass::ConnectClass(ConfigTag* tag, char t, const std::string& mask, const ConnectClass& parent)
1215 {
1216         Update(&parent);
1217         name = "unnamed";
1218         type = t;
1219         host = mask;
1220
1221         // Connect classes can inherit from each other but this is problematic for modules which can't use
1222         // ConnectClass::Update so we build a hybrid tag containing all of the values set on this class as
1223         // well as the parent class.
1224         ConfigItems* items = NULL;
1225         config = ConfigTag::create(tag->tag, tag->src_name, tag->src_line, items);
1226
1227         const ConfigItems& parentkeys = parent.config->getItems();
1228         for (ConfigItems::const_iterator piter = parentkeys.begin(); piter != parentkeys.end(); ++piter)
1229         {
1230                 // The class name and parent name are not inherited
1231                 if (piter->first == "name" || piter->first == "parent")
1232                         continue;
1233
1234                 // Store the item in the config tag. If this item also
1235                 // exists in the child it will be overwritten.
1236                 (*items)[piter->first] = piter->second;
1237         }
1238
1239         const ConfigItems& childkeys = tag->getItems();
1240         for (ConfigItems::const_iterator citer = childkeys.begin(); citer != childkeys.end(); ++citer)
1241         {
1242                 // This will overwrite the parent value if present.
1243                 (*items)[citer->first] = citer->second;
1244         }
1245 }
1246
1247 void ConnectClass::Update(const ConnectClass* src)
1248 {
1249         config = src->config;
1250         type = src->type;
1251         fakelag = src->fakelag;
1252         name = src->name;
1253         registration_timeout = src->registration_timeout;
1254         host = src->host;
1255         pingtime = src->pingtime;
1256         softsendqmax = src->softsendqmax;
1257         hardsendqmax = src->hardsendqmax;
1258         recvqmax = src->recvqmax;
1259         penaltythreshold = src->penaltythreshold;
1260         commandrate = src->commandrate;
1261         maxlocal = src->maxlocal;
1262         maxglobal = src->maxglobal;
1263         maxconnwarn = src->maxconnwarn;
1264         maxchans = src->maxchans;
1265         limit = src->limit;
1266         resolvehostnames = src->resolvehostnames;
1267         ports = src->ports;
1268 }