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Remove Log() calls made unnecessary by the previous commit.
[user/henk/code/inspircd.git] / 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 "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.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->Users->all_opers.push_back(this);
379
380         // Expand permissions from config for faster lookup
381         if (IS_LOCAL(this))
382                 oper->init();
383
384         FOREACH_MOD(OnPostOper, (this, oper->name, opername));
385 }
386
387 void OperInfo::init()
388 {
389         AllowedOperCommands.Clear();
390         AllowedPrivs.Clear();
391         AllowedUserModes.reset();
392         AllowedChanModes.reset();
393         AllowedUserModes['o' - 'A'] = true; // Call me paranoid if you want.
394
395         for(std::vector<reference<ConfigTag> >::iterator iter = class_blocks.begin(); iter != class_blocks.end(); ++iter)
396         {
397                 ConfigTag* tag = *iter;
398
399                 AllowedOperCommands.AddList(tag->getString("commands"));
400                 AllowedPrivs.AddList(tag->getString("privs"));
401
402                 std::string modes = tag->getString("usermodes");
403                 for (std::string::const_iterator c = modes.begin(); c != modes.end(); ++c)
404                 {
405                         if (*c == '*')
406                         {
407                                 this->AllowedUserModes.set();
408                         }
409                         else if (*c >= 'A' && *c <= 'z')
410                         {
411                                 this->AllowedUserModes[*c - 'A'] = true;
412                         }
413                 }
414
415                 modes = tag->getString("chanmodes");
416                 for (std::string::const_iterator c = modes.begin(); c != modes.end(); ++c)
417                 {
418                         if (*c == '*')
419                         {
420                                 this->AllowedChanModes.set();
421                         }
422                         else if (*c >= 'A' && *c <= 'z')
423                         {
424                                 this->AllowedChanModes[*c - 'A'] = true;
425                         }
426                 }
427         }
428 }
429
430 void User::UnOper()
431 {
432         if (!this->IsOper())
433                 return;
434
435         /*
436          * unset their oper type (what IS_OPER checks).
437          * note, order is important - this must come before modes as -o attempts
438          * to call UnOper. -- w00t
439          */
440         oper = NULL;
441
442
443         /* Remove all oper only modes from the user when the deoper - Bug #466*/
444         Modes::ChangeList changelist;
445         const ModeParser::ModeHandlerMap& usermodes = ServerInstance->Modes->GetModes(MODETYPE_USER);
446         for (ModeParser::ModeHandlerMap::const_iterator i = usermodes.begin(); i != usermodes.end(); ++i)
447         {
448                 ModeHandler* mh = i->second;
449                 if (mh->NeedsOper())
450                         changelist.push_remove(mh);
451         }
452
453         ServerInstance->Modes->Process(this, NULL, this, changelist);
454
455         // Remove the user from the oper list
456         stdalgo::vector::swaperase(ServerInstance->Users->all_opers, this);
457
458         ModeHandler* opermh = ServerInstance->Modes->FindMode('o', MODETYPE_USER);
459         this->SetMode(opermh, false);
460         FOREACH_MOD(OnPostDeoper, (this));
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         const 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.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         // The maximum size of an IRC message minus the terminating CR+LF.
771         const size_t maxmessage = ServerInstance->Config->Limits.MaxLine - 2;
772         if (text.length() > maxmessage)
773         {
774                 // This should happen rarely or never. Crop the string at MaxLine and try again.
775                 std::string try_again(text, 0, maxmessage);
776                 Write(try_again);
777                 return;
778         }
779
780         ServerInstance->Logs->Log("USEROUTPUT", LOG_RAWIO, "C[%s] O %s", uuid.c_str(), text.c_str());
781
782         eh.AddWriteBuf(text);
783         eh.AddWriteBuf(wide_newline);
784
785         const size_t bytessent = text.length() + 2;
786         ServerInstance->stats.Sent += bytessent;
787         this->bytes_out += bytessent;
788         this->cmds_out++;
789 }
790
791 /** Write()
792  */
793 void LocalUser::Write(const char *text, ...)
794 {
795         std::string textbuffer;
796         VAFORMAT(textbuffer, text, text);
797         this->Write(textbuffer);
798 }
799
800 void User::WriteServ(const std::string& text)
801 {
802         this->Write(":%s %s",ServerInstance->Config->ServerName.c_str(),text.c_str());
803 }
804
805 /** WriteServ()
806  *  Same as Write(), except `text' is prefixed with `:server.name '.
807  */
808 void User::WriteServ(const char* text, ...)
809 {
810         std::string textbuffer;
811         VAFORMAT(textbuffer, text, text);
812         this->WriteServ(textbuffer);
813 }
814
815 void User::WriteCommand(const char* command, const std::string& text)
816 {
817         this->WriteServ(command + (this->registered & REG_NICK ? " " + this->nick : " *") + " " + text);
818 }
819
820 namespace
821 {
822         std::string BuildNumeric(const std::string& source, User* targetuser, unsigned int num, const std::vector<std::string>& params)
823         {
824                 const char* const target = (targetuser->registered & REG_NICK ? targetuser->nick.c_str() : "*");
825                 std::string raw = InspIRCd::Format(":%s %03u %s", source.c_str(), num, target);
826                 if (!params.empty())
827                 {
828                         for (std::vector<std::string>::const_iterator i = params.begin(); i != params.end()-1; ++i)
829                                 raw.append(1, ' ').append(*i);
830                         raw.append(" :").append(params.back());
831                 }
832                 return raw;
833         }
834 }
835
836 void User::WriteNumeric(const Numeric::Numeric& numeric)
837 {
838         ModResult MOD_RESULT;
839
840         FIRST_MOD_RESULT(OnNumeric, MOD_RESULT, (this, numeric));
841
842         if (MOD_RESULT == MOD_RES_DENY)
843                 return;
844
845         const std::string& servername = (numeric.GetServer() ? numeric.GetServer()->GetName() : ServerInstance->Config->ServerName);
846         this->Write(BuildNumeric(servername, this, numeric.GetNumeric(), numeric.GetParams()));
847 }
848
849 void User::WriteFrom(User *user, const std::string &text)
850 {
851         const std::string message = ":" + user->GetFullHost() + " " + text;
852         this->Write(message);
853 }
854
855
856 /* write text from an originating user to originating user */
857
858 void User::WriteFrom(User *user, const char* text, ...)
859 {
860         std::string textbuffer;
861         VAFORMAT(textbuffer, text, text);
862         this->WriteFrom(user, textbuffer);
863 }
864
865 void User::WriteRemoteNotice(const std::string& text)
866 {
867         ServerInstance->PI->SendUserNotice(this, text);
868 }
869
870 void LocalUser::WriteRemoteNotice(const std::string& text)
871 {
872         WriteNotice(text);
873 }
874
875 namespace
876 {
877         class WriteCommonRawHandler : public User::ForEachNeighborHandler
878         {
879                 const std::string& msg;
880
881                 void Execute(LocalUser* user) CXX11_OVERRIDE
882                 {
883                         user->Write(msg);
884                 }
885
886          public:
887                 WriteCommonRawHandler(const std::string& message)
888                         : msg(message)
889                 {
890                 }
891         };
892 }
893
894 void User::WriteCommon(const char* text, ...)
895 {
896         std::string textbuffer;
897         VAFORMAT(textbuffer, text, text);
898         textbuffer = ":" + this->GetFullHost() + " " + textbuffer;
899         this->WriteCommonRaw(textbuffer, true);
900 }
901
902 void User::WriteCommonRaw(const std::string &line, bool include_self)
903 {
904         WriteCommonRawHandler handler(line);
905         ForEachNeighbor(handler, include_self);
906 }
907
908 void User::ForEachNeighbor(ForEachNeighborHandler& handler, bool include_self)
909 {
910         // The basic logic for visiting the neighbors of a user is to iterate the channel list of the user
911         // and visit all users on those channels. Because two users may share more than one common channel,
912         // we must skip users that we have already visited.
913         // To do this, we make use of a global counter and an integral 'already_sent' field in LocalUser.
914         // The global counter is incremented every time we do something for each neighbor of a user. Then,
915         // before visiting a member we examine user->already_sent. If it's equal to the current counter, we
916         // skip the member. Otherwise, we set it to the current counter and visit the member.
917
918         // Ask modules to build a list of exceptions.
919         // Mods may also exclude entire channels by erasing them from include_chans.
920         IncludeChanList include_chans(chans.begin(), chans.end());
921         std::map<User*, bool> exceptions;
922         exceptions[this] = include_self;
923         FOREACH_MOD(OnBuildNeighborList, (this, include_chans, exceptions));
924
925         // Get next id, guaranteed to differ from the already_sent field of all users
926         const already_sent_t newid = ServerInstance->Users.NextAlreadySentId();
927
928         // Handle exceptions first
929         for (std::map<User*, bool>::const_iterator i = exceptions.begin(); i != exceptions.end(); ++i)
930         {
931                 LocalUser* curr = IS_LOCAL(i->first);
932                 if (curr)
933                 {
934                         // Mark as visited to ensure we won't visit again if there is a common channel
935                         curr->already_sent = newid;
936                         // Always treat quitting users as excluded
937                         if ((i->second) && (!curr->quitting))
938                                 handler.Execute(curr);
939                 }
940         }
941
942         // Now consider the real neighbors
943         for (IncludeChanList::const_iterator i = include_chans.begin(); i != include_chans.end(); ++i)
944         {
945                 Channel* chan = (*i)->chan;
946                 const Channel::MemberMap& userlist = chan->GetUsers();
947                 for (Channel::MemberMap::const_iterator j = userlist.begin(); j != userlist.end(); ++j)
948                 {
949                         LocalUser* curr = IS_LOCAL(j->first);
950                         // User not yet visited?
951                         if ((curr) && (curr->already_sent != newid))
952                         {
953                                 // Mark as visited and execute function
954                                 curr->already_sent = newid;
955                                 handler.Execute(curr);
956                         }
957                 }
958         }
959 }
960
961 void User::WriteRemoteNumeric(const Numeric::Numeric& numeric)
962 {
963         WriteNumeric(numeric);
964 }
965
966 /* return 0 or 1 depending if users u and u2 share one or more common channels
967  * (used by QUIT, NICK etc which arent channel specific notices)
968  *
969  * The old algorithm in 1.0 for this was relatively inefficient, iterating over
970  * the first users channels then the second users channels within the outer loop,
971  * therefore it was a maximum of x*y iterations (upon returning 0 and checking
972  * all possible iterations). However this new function instead checks against the
973  * channel's userlist in the inner loop which is a std::map<User*,User*>
974  * and saves us time as we already know what pointer value we are after.
975  * Don't quote me on the maths as i am not a mathematician or computer scientist,
976  * but i believe this algorithm is now x+(log y) maximum iterations instead.
977  */
978 bool User::SharesChannelWith(User *other)
979 {
980         /* Outer loop */
981         for (User::ChanList::iterator i = this->chans.begin(); i != this->chans.end(); ++i)
982         {
983                 /* Eliminate the inner loop (which used to be ~equal in size to the outer loop)
984                  * by replacing it with a map::find which *should* be more efficient
985                  */
986                 if ((*i)->chan->HasUser(other))
987                         return true;
988         }
989         return false;
990 }
991
992 bool User::ChangeName(const std::string& gecos)
993 {
994         if (!this->fullname.compare(gecos))
995                 return true;
996
997         if (IS_LOCAL(this))
998         {
999                 ModResult MOD_RESULT;
1000                 FIRST_MOD_RESULT(OnChangeLocalUserGECOS, MOD_RESULT, (IS_LOCAL(this),gecos));
1001                 if (MOD_RESULT == MOD_RES_DENY)
1002                         return false;
1003                 FOREACH_MOD(OnChangeName, (this,gecos));
1004         }
1005         this->fullname.assign(gecos, 0, ServerInstance->Config->Limits.MaxGecos);
1006
1007         return true;
1008 }
1009
1010 bool User::ChangeDisplayedHost(const std::string& shost)
1011 {
1012         if (GetDisplayedHost() == shost)
1013                 return true;
1014
1015         if (IS_LOCAL(this))
1016         {
1017                 ModResult MOD_RESULT;
1018                 FIRST_MOD_RESULT(OnChangeLocalUserHost, MOD_RESULT, (IS_LOCAL(this),shost));
1019                 if (MOD_RESULT == MOD_RES_DENY)
1020                         return false;
1021         }
1022
1023         FOREACH_MOD(OnChangeHost, (this,shost));
1024
1025         if (realhost == shost)
1026                 this->displayhost.clear();
1027         else
1028                 this->displayhost.assign(shost, 0, ServerInstance->Config->Limits.MaxHost);
1029
1030         this->InvalidateCache();
1031
1032         if (IS_LOCAL(this))
1033                 this->WriteNumeric(RPL_YOURDISPLAYEDHOST, this->GetDisplayedHost(), "is now your displayed host");
1034
1035         return true;
1036 }
1037
1038 void User::ChangeRealHost(const std::string& host, bool resetdisplay)
1039 {
1040         // If the real host is the new host and we are not resetting the
1041         // display host then we have nothing to do.
1042         const bool changehost = (realhost != host);
1043         if (!changehost && !resetdisplay)
1044                 return;
1045         
1046         // If the displayhost is not set and we are not resetting it then
1047         // we need to copy it to the displayhost field.
1048         if (displayhost.empty() && !resetdisplay)
1049                 displayhost = realhost;
1050
1051         // If the displayhost is the new host or we are resetting it then
1052         // we clear its contents to save memory.
1053         else if (displayhost == host || resetdisplay)
1054                 displayhost.clear();
1055
1056         // If we are just resetting the display host then we don't need to
1057         // do anything else.
1058         if (!changehost)
1059                 return;
1060
1061         realhost = host;
1062         this->InvalidateCache();
1063 }
1064
1065 bool User::ChangeIdent(const std::string& newident)
1066 {
1067         if (this->ident == newident)
1068                 return true;
1069
1070         FOREACH_MOD(OnChangeIdent, (this,newident));
1071
1072         this->ident.assign(newident, 0, ServerInstance->Config->Limits.IdentMax);
1073         this->InvalidateCache();
1074
1075         return true;
1076 }
1077
1078 /*
1079  * Sets a user's connection class.
1080  * If the class name is provided, it will be used. Otherwise, the class will be guessed using host/ip/ident/etc.
1081  * NOTE: If the <ALLOW> or <DENY> tag specifies an ip, and this user resolves,
1082  * then their ip will be taken as 'priority' anyway, so for example,
1083  * <connect allow="127.0.0.1"> will match joe!bloggs@localhost
1084  */
1085 void LocalUser::SetClass(const std::string &explicit_name)
1086 {
1087         ConnectClass *found = NULL;
1088
1089         ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "Setting connect class for UID %s", this->uuid.c_str());
1090
1091         if (!explicit_name.empty())
1092         {
1093                 for (ServerConfig::ClassVector::const_iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); ++i)
1094                 {
1095                         ConnectClass* c = *i;
1096
1097                         if (explicit_name == c->name)
1098                         {
1099                                 ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "Explicitly set to %s", explicit_name.c_str());
1100                                 found = c;
1101                         }
1102                 }
1103         }
1104         else
1105         {
1106                 for (ServerConfig::ClassVector::const_iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); ++i)
1107                 {
1108                         ConnectClass* c = *i;
1109                         ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "Checking %s", c->GetName().c_str());
1110
1111                         ModResult MOD_RESULT;
1112                         FIRST_MOD_RESULT(OnSetConnectClass, MOD_RESULT, (this,c));
1113                         if (MOD_RESULT == MOD_RES_DENY)
1114                                 continue;
1115                         if (MOD_RESULT == MOD_RES_ALLOW)
1116                         {
1117                                 ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "Class forced by module to %s", c->GetName().c_str());
1118                                 found = c;
1119                                 break;
1120                         }
1121
1122                         if (c->type == CC_NAMED)
1123                                 continue;
1124
1125                         bool regdone = (registered != REG_NONE);
1126                         if (c->config->getBool("registered", regdone) != regdone)
1127                                 continue;
1128
1129                         /* check if host matches.. */
1130                         if (!InspIRCd::MatchCIDR(this->GetIPString(), c->GetHost(), NULL) &&
1131                             !InspIRCd::MatchCIDR(this->GetRealHost(), c->GetHost(), NULL))
1132                         {
1133                                 ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "No host match (for %s)", c->GetHost().c_str());
1134                                 continue;
1135                         }
1136
1137                         /*
1138                          * deny change if change will take class over the limit check it HERE, not after we found a matching class,
1139                          * because we should attempt to find another class if this one doesn't match us. -- w00t
1140                          */
1141                         if (c->limit && (c->GetReferenceCount() >= c->limit))
1142                         {
1143                                 ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "OOPS: Connect class limit (%lu) hit, denying", c->limit);
1144                                 continue;
1145                         }
1146
1147                         /* if it requires a port ... */
1148                         if (!c->ports.empty())
1149                         {
1150                                 /* and our port doesn't match, fail. */
1151                                 if (!c->ports.count(this->GetServerPort()))
1152                                 {
1153                                         ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "Requires a different port, skipping");
1154                                         continue;
1155                                 }
1156                         }
1157
1158                         if (regdone && !c->config->getString("password").empty())
1159                         {
1160                                 if (!ServerInstance->PassCompare(this, c->config->getString("password"), password, c->config->getString("hash")))
1161                                 {
1162                                         ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "Bad password, skipping");
1163                                         continue;
1164                                 }
1165                         }
1166
1167                         /* we stop at the first class that meets ALL critera. */
1168                         found = c;
1169                         break;
1170                 }
1171         }
1172
1173         /*
1174          * Okay, assuming we found a class that matches.. switch us into that class, keeping refcounts up to date.
1175          */
1176         if (found)
1177         {
1178                 MyClass = found;
1179         }
1180 }
1181
1182 void User::PurgeEmptyChannels()
1183 {
1184         // firstly decrement the count on each channel
1185         for (User::ChanList::iterator i = this->chans.begin(); i != this->chans.end(); )
1186         {
1187                 Channel* c = (*i)->chan;
1188                 ++i;
1189                 c->DelUser(this);
1190         }
1191
1192         this->UnOper();
1193 }
1194
1195 const std::string& FakeUser::GetFullHost()
1196 {
1197         if (!ServerInstance->Config->HideServer.empty())
1198                 return ServerInstance->Config->HideServer;
1199         return server->GetName();
1200 }
1201
1202 const std::string& FakeUser::GetFullRealHost()
1203 {
1204         if (!ServerInstance->Config->HideServer.empty())
1205                 return ServerInstance->Config->HideServer;
1206         return server->GetName();
1207 }
1208
1209 ConnectClass::ConnectClass(ConfigTag* tag, char t, const std::string& mask)
1210         : config(tag), type(t), fakelag(true), name("unnamed"), registration_timeout(0), host(mask),
1211         pingtime(0), softsendqmax(0), hardsendqmax(0), recvqmax(0),
1212         penaltythreshold(0), commandrate(0), maxlocal(0), maxglobal(0), maxconnwarn(true), maxchans(ServerInstance->Config->MaxChans),
1213         limit(0), resolvehostnames(true)
1214 {
1215 }
1216
1217 ConnectClass::ConnectClass(ConfigTag* tag, char t, const std::string& mask, const ConnectClass& parent)
1218 {
1219         Update(&parent);
1220         name = "unnamed";
1221         type = t;
1222         host = mask;
1223
1224         // Connect classes can inherit from each other but this is problematic for modules which can't use
1225         // ConnectClass::Update so we build a hybrid tag containing all of the values set on this class as
1226         // well as the parent class.
1227         ConfigItems* items = NULL;
1228         config = ConfigTag::create(tag->tag, tag->src_name, tag->src_line, items);
1229
1230         const ConfigItems& parentkeys = parent.config->getItems();
1231         for (ConfigItems::const_iterator piter = parentkeys.begin(); piter != parentkeys.end(); ++piter)
1232         {
1233                 // The class name and parent name are not inherited
1234                 if (piter->first == "name" || piter->first == "parent")
1235                         continue;
1236
1237                 // Store the item in the config tag. If this item also
1238                 // exists in the child it will be overwritten.
1239                 (*items)[piter->first] = piter->second;
1240         }
1241
1242         const ConfigItems& childkeys = tag->getItems();
1243         for (ConfigItems::const_iterator citer = childkeys.begin(); citer != childkeys.end(); ++citer)
1244         {
1245                 // This will overwrite the parent value if present.
1246                 (*items)[citer->first] = citer->second;
1247         }
1248 }
1249
1250 void ConnectClass::Update(const ConnectClass* src)
1251 {
1252         config = src->config;
1253         type = src->type;
1254         fakelag = src->fakelag;
1255         name = src->name;
1256         registration_timeout = src->registration_timeout;
1257         host = src->host;
1258         pingtime = src->pingtime;
1259         softsendqmax = src->softsendqmax;
1260         hardsendqmax = src->hardsendqmax;
1261         recvqmax = src->recvqmax;
1262         penaltythreshold = src->penaltythreshold;
1263         commandrate = src->commandrate;
1264         maxlocal = src->maxlocal;
1265         maxglobal = src->maxglobal;
1266         maxconnwarn = src->maxconnwarn;
1267         maxchans = src->maxchans;
1268         limit = src->limit;
1269         resolvehostnames = src->resolvehostnames;
1270         ports = src->ports;
1271 }