summaryrefslogtreecommitdiff
path: root/include/users.h
blob: bae2615c251748106e814e0c57be32641163c7e4 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
/*
 * InspIRCd -- Internet Relay Chat Daemon
 *
 *   Copyright (C) 2019 linuxdaemon <linuxdaemon.irc@gmail.com>
 *   Copyright (C) 2019 Matt Schatz <genius3000@g3k.solutions>
 *   Copyright (C) 2013 Daniel Vassdal <shutter@canternet.org>
 *   Copyright (C) 2012-2016, 2018 Attila Molnar <attilamolnar@hush.com>
 *   Copyright (C) 2012-2013, 2016-2019 Sadie Powell <sadie@witchery.services>
 *   Copyright (C) 2012, 2018-2019 Robby <robby@chatbelgie.be>
 *   Copyright (C) 2012 DjSlash <djslash@djslash.org>
 *   Copyright (C) 2012 ChrisTX <xpipe@hotmail.de>
 *   Copyright (C) 2009-2010 Daniel De Graaf <danieldg@inspircd.org>
 *   Copyright (C) 2009 Uli Schlachter <psychon@inspircd.org>
 *   Copyright (C) 2008 Thomas Stagner <aquanight@inspircd.org>
 *   Copyright (C) 2008 John Brooks <special@inspircd.org>
 *   Copyright (C) 2007-2009 Robin Burchell <robin+git@viroteck.net>
 *   Copyright (C) 2007, 2009 Dennis Friis <peavey@inspircd.org>
 *   Copyright (C) 2006-2008 Craig Edwards <brain@inspircd.org>
 *
 * This file is part of InspIRCd.  InspIRCd is free software: you can
 * redistribute it and/or modify it under the terms of the GNU General Public
 * License as published by the Free Software Foundation, version 2.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */


#pragma once

#include "socket.h"
#include "inspsocket.h"
#include "mode.h"
#include "membership.h"

/** connect class types
 */
enum ClassTypes {
	/** connect:allow */
	CC_ALLOW = 0,
	/** connect:deny */
	CC_DENY  = 1,
	/** named connect block (for opers, etc) */
	CC_NAMED = 2
};

/** Registration state of a user, e.g.
 * have they sent USER, NICK, PASS yet?
 */
enum RegistrationState {

#ifndef _WIN32   // Burlex: This is already defined in win32, luckily it is still 0.
	REG_NONE = 0,		/* Has sent nothing */
#endif

	REG_USER = 1,		/* Has sent USER */
	REG_NICK = 2,		/* Has sent NICK */
	REG_NICKUSER = 3, 	/* Bitwise combination of REG_NICK and REG_USER */
	REG_ALL = 7	  	/* REG_NICKUSER plus next bit along */
};

enum UserType {
	USERTYPE_LOCAL = 1,
	USERTYPE_REMOTE = 2,
	USERTYPE_SERVER = 3
};

/** Holds information relevent to &lt;connect allow&gt; and &lt;connect deny&gt; tags in the config file.
 */
struct CoreExport ConnectClass : public refcountbase
{
	reference<ConfigTag> config;
	/** Type of line, either CC_ALLOW or CC_DENY
	 */
	char type;

	/** True if this class uses fake lag to manage flood, false if it kills */
	bool fakelag;

	/** Connect class name
	 */
	std::string name;

	/** Max time to register the connection in seconds
	 */
	unsigned int registration_timeout;

	/** Host mask for this line
	 */
	std::string host;

	/** Number of seconds between pings for this line
	 */
	unsigned int pingtime;

	/** Maximum size of sendq for users in this class (bytes)
	 * Users cannot send commands if they go over this limit
	 */
	unsigned long softsendqmax;

	/** Maximum size of sendq for users in this class (bytes)
	 * Users are killed if they go over this limit
	 */
	unsigned long hardsendqmax;

	/** Maximum size of recvq for users in this class (bytes)
	 */
	unsigned long recvqmax;

	/** Seconds worth of penalty before penalty system activates
	 */
	unsigned int penaltythreshold;

	/** Maximum rate of commands (units: millicommands per second) */
	unsigned int commandrate;

	/** Local max when connecting by this connection class
	 */
	unsigned long maxlocal;

	/** Global max when connecting by this connection class
	 */
	unsigned long maxglobal;

	/** True if max connections for this class is hit and a warning is wanted
	 */
	bool maxconnwarn;

	/** Max channels for this class
	 */
	unsigned int maxchans;

	/** How many users may be in this connect class before they are refused?
	 * (0 = no limit = default)
	 */
	unsigned long limit;

	/** If set to true, no user DNS lookups are to be performed
	 */
	bool resolvehostnames;

	/**
	 * If non-empty the server ports which this user has to be using
	 */
	insp::flat_set<int> ports;

	/** If non-empty then the password a user must specify in PASS to be assigned to this class. */
	std::string password;

	/** If non-empty then the hash algorithm that the password field is hashed with. */
	std::string passwordhash;

	/** Create a new connect class with no settings.
	 */
	ConnectClass(ConfigTag* tag, char type, const std::string& mask);
	/** Create a new connect class with inherited settings.
	 */
	ConnectClass(ConfigTag* tag, char type, const std::string& mask, const ConnectClass& parent);

	/** Update the settings in this block to match the given block */
	void Update(const ConnectClass* newSettings);

	const std::string& GetName() { return name; }
	const std::string& GetHost() { return host; }

	/** Returns the registration timeout
	 */
	time_t GetRegTimeout()
	{
		return (registration_timeout ? registration_timeout : 90);
	}

	/** Returns the ping frequency
	 */
	unsigned int GetPingTime()
	{
		return (pingtime ? pingtime : 120);
	}

	/** Returns the maximum sendq value (soft limit)
	 * Note that this is in addition to internal OS buffers
	 */
	unsigned long GetSendqSoftMax()
	{
		return (softsendqmax ? softsendqmax : 4096);
	}

	/** Returns the maximum sendq value (hard limit)
	 */
	unsigned long GetSendqHardMax()
	{
		return (hardsendqmax ? hardsendqmax : 0x100000);
	}

	/** Returns the maximum recvq value
	 */
	unsigned long GetRecvqMax()
	{
		return (recvqmax ? recvqmax : 4096);
	}

	/** Returns the penalty threshold value
	 */
	unsigned int GetPenaltyThreshold()
	{
		return penaltythreshold ? penaltythreshold : (fakelag ? 10 : 20);
	}

	unsigned int GetCommandRate()
	{
		return commandrate ? commandrate : 1000;
	}

	/** Return the maximum number of local sessions
	 */
	unsigned long GetMaxLocal()
	{
		return maxlocal;
	}

	/** Returns the maximum number of global sessions
	 */
	unsigned long GetMaxGlobal()
	{
		return maxglobal;
	}
};

/** Holds all information about a user
 * This class stores all information about a user connected to the irc server. Everything about a
 * connection is stored here primarily, from the user's socket ID (file descriptor) through to the
 * user's nickname and hostname.
 */
class CoreExport User : public Extensible
{
 private:
	/** Cached nick!ident@dhost value using the displayed hostname
	 */
	std::string cached_fullhost;

	/** Cached ident@ip value using the real IP address
	 */
	std::string cached_hostip;

	/** Cached ident@realhost value using the real hostname
	 */
	std::string cached_makehost;

	/** Cached nick!ident@realhost value using the real hostname
	 */
	std::string cached_fullrealhost;

	/** Set by GetIPString() to avoid constantly re-grabbing IP via sockets voodoo.
	 */
	std::string cachedip;

	/** If set then the hostname which is displayed to users. */
	std::string displayhost;

	/** The real hostname of this user. */
	std::string realhost;

	/** The real name of this user. */
	std::string realname;

	/** The user's mode list.
	 * Much love to the STL for giving us an easy to use bitset, saving us RAM.
	 * if (modes[modeid]) is set, then the mode is set.
	 * For example, to work out if mode +i is set, we check the field
	 * User::modes[invisiblemode->modeid] == true.
	 */
	std::bitset<ModeParser::MODEID_MAX> modes;

 public:
	/** To execute a function for each local neighbor of a user, inherit from this class and
	 * pass an instance of it to User::ForEachNeighbor().
	 */
	class ForEachNeighborHandler
	{
	 public:
		/** Method to execute for each local neighbor of a user.
		 * Derived classes must implement this.
		 * @param user Current neighbor
		 */
		virtual void Execute(LocalUser* user) = 0;
	};

	/** List of Memberships for this user
	 */
	typedef insp::intrusive_list<Membership> ChanList;

	/** Time that the object was instantiated (used for TS calculation etc)
	*/
	time_t age;

	/** Time the connection was created, set in the constructor. This
	 * may be different from the time the user's classbase object was
	 * created.
	 */
	time_t signon;

	/** Client address that the user is connected from.
	 * Do not modify this value directly, use SetClientIP() to change it.
	 * Port is not valid for remote users.
	 */
	irc::sockets::sockaddrs client_sa;

	/** The users nickname.
	 * An invalid nickname indicates an unregistered connection prior to the NICK command.
	 * Use InspIRCd::IsNick() to validate nicknames.
	 */
	std::string nick;

	/** The user's unique identifier.
	 * This is the unique identifier which the user has across the network.
	 */
	const std::string uuid;

	/** The users ident reply.
	 * Two characters are added to the user-defined limit to compensate for the tilde etc.
	 */
	std::string ident;

	/** What snomasks are set on this user.
	 * This functions the same as the above modes.
	 */
	std::bitset<64> snomasks;

	/** Channels this user is on
	 */
	ChanList chans;

	/** The server the user is connected to.
	 */
	Server* server;

	/** The user's away message.
	 * If this string is empty, the user is not marked as away.
	 */
	std::string awaymsg;

	/** Time the user last went away.
	 * This is ONLY RELIABLE if user IsAway()!
	 */
	time_t awaytime;

	/** The oper type they logged in as, if they are an oper.
	 */
	reference<OperInfo> oper;

	/** Used by User to indicate the registration status of the connection
	 * It is a bitfield of the REG_NICK, REG_USER and REG_ALL bits to indicate
	 * the connection state.
	 */
	unsigned int registered:3;

	/** If this is set to true, then all socket operations for the user
	 * are dropped into the bit-bucket.
	 * This value is set by QuitUser, and is not needed seperately from that call.
	 * Please note that setting this value alone will NOT cause the user to quit.
	 */
	unsigned int quitting:1;

	/** What type of user is this? */
	const UserType usertype:2;

	/** Get client IP string from sockaddr, using static internal buffer
	 * @return The IP string
	 */
	const std::string& GetIPString();

	/** Retrieves this user's hostname.
	 * @param uncloak If true then return the real host; otherwise, the display host.
	 */
	const std::string& GetHost(bool uncloak) const;

	/** Retrieves this user's displayed hostname. */
	const std::string& GetDisplayedHost() const;

	/** Retrieves this user's real hostname. */
	const std::string& GetRealHost() const;

	/** Retrieves this user's real name. */
	const std::string& GetRealName() const;

	/** Get CIDR mask, using default range, for this user
	 */
	irc::sockets::cidr_mask GetCIDRMask();

	/** Sets the client IP for this user
	 * @return true if the conversion was successful
	 */
	virtual bool SetClientIP(const std::string& address);

	virtual void SetClientIP(const irc::sockets::sockaddrs& sa);

	/** Constructor
	 * @throw CoreException if the UID allocated to the user already exists
	 */
	User(const std::string& uid, Server* srv, UserType objtype);

	/** Returns the full displayed host of the user
	 * This member function returns the hostname of the user as seen by other users
	 * on the server, in nick!ident\@host form.
	 * @return The full masked host of the user
	 */
	virtual const std::string& GetFullHost();

	/** Returns the full real host of the user
	 * This member function returns the hostname of the user as seen by other users
	 * on the server, in nick!ident\@host form. If any form of hostname cloaking is in operation,
	 * e.g. through a module, then this method will ignore it and return the true hostname.
	 * @return The full real host of the user
	 */
	virtual const std::string& GetFullRealHost();

	/** This clears any cached results that are used for GetFullRealHost() etc.
	 * The results of these calls are cached as generating them can be generally expensive.
	 */
	void InvalidateCache();

	/** Returns whether this user is currently away or not. If true,
	 * further information can be found in User::awaymsg and User::awaytime
	 * @return True if the user is away, false otherwise
	 */
	bool IsAway() const { return (!awaymsg.empty()); }

	/** Returns whether this user is an oper or not. If true,
	 * oper information can be obtained from User::oper
	 * @return True if the user is an oper, false otherwise
	 */
	bool IsOper() const { return oper; }

	/** Returns true if a notice mask is set
	 * @param sm A notice mask character to check
	 * @return True if the notice mask is set
	 */
	bool IsNoticeMaskSet(unsigned char sm);

	/** Get the mode letters of modes set on the user as a string.
	 * @param includeparams True to get the parameters of the modes as well. Defaults to false.
	 * @return Mode letters of modes set on the user and optionally the parameters of those modes, if any.
	 * The returned string always begins with a '+' character. If the user has no modes set, "+" is returned.
	 */
	std::string GetModeLetters(bool includeparams = false) const;

	/** Returns true if a specific mode is set
	 * @param m The user mode
	 * @return True if the mode is set
	 */
	bool IsModeSet(unsigned char m) const;
	bool IsModeSet(const ModeHandler* mh) const;
	bool IsModeSet(const ModeHandler& mh) const { return IsModeSet(&mh); }
	bool IsModeSet(UserModeReference& moderef) const;

	/** Set a specific usermode to on or off
	 * @param mh The user mode
	 * @param value On or off setting of the mode
	 */
	void SetMode(ModeHandler* mh, bool value);
	void SetMode(ModeHandler& mh, bool value) { SetMode(&mh, value); }

	/** Returns true or false for if a user can execute a privilaged oper command.
	 * This is done by looking up their oper type from User::oper, then referencing
	 * this to their oper classes and checking the commands they can execute.
	 * @param command A command (should be all CAPS)
	 * @return True if this user can execute the command
	 */
	virtual bool HasCommandPermission(const std::string& command);

	/** Returns true if a user has a given permission.
	 * This is used to check whether or not users may perform certain actions which admins may not wish to give to
	 * all operators, yet are not commands. An example might be oper override, mass messaging (/notice $*), etc.
	 *
	 * @param privstr The priv to chec, e.g. "users/override/topic". These are loaded free-form from the config file.
	 * @return True if this user has the permission in question.
	 */
	virtual bool HasPrivPermission(const std::string& privstr);

	/** Returns true or false if a user can set a privileged user or channel mode.
	 * This is done by looking up their oper type from User::oper, then referencing
	 * this to their oper classes, and checking the modes they can set.
	 * @param mh Mode to check
	 * @return True if the user can set or unset this mode.
	 */
	virtual bool HasModePermission(const ModeHandler* mh) const;

	/** Creates a usermask with real host.
	 * Takes a buffer to use and fills the given buffer with the hostmask in the format user\@host
	 * @return the usermask in the format user\@host
	 */
	const std::string& MakeHost();

	/** Creates a usermask with real ip.
	 * Takes a buffer to use and fills the given buffer with the ipmask in the format user\@ip
	 * @return the usermask in the format user\@ip
	 */
	const std::string& MakeHostIP();

	/** Oper up the user using the given opertype.
	 * This will also give the +o usermode.
	 */
	void Oper(OperInfo* info);

	/** Oper down.
	 * This will clear the +o usermode and unset the user's oper type
	 */
	void UnOper();

	/** Sends a server notice to this user.
	 * @param text The contents of the message to send.
	 */
	void WriteNotice(const std::string& text);

	/** Send a NOTICE message from the local server to the user.
	 * @param text Text to send
	 */
	virtual void WriteRemoteNotice(const std::string& text);

	virtual void WriteRemoteNumeric(const Numeric::Numeric& numeric);

	template <typename T1>
	void WriteRemoteNumeric(unsigned int numeric, T1 p1)
	{
		Numeric::Numeric n(numeric);
		n.push(p1);
		WriteRemoteNumeric(n);
	}

	template <typename T1, typename T2>
	void WriteRemoteNumeric(unsigned int numeric, T1 p1, T2 p2)
	{
		Numeric::Numeric n(numeric);
		n.push(p1);
		n.push(p2);
		WriteRemoteNumeric(n);
	}

	template <typename T1, typename T2, typename T3>
	void WriteRemoteNumeric(unsigned int numeric, T1 p1, T2 p2, T3 p3)
	{
		Numeric::Numeric n(numeric);
		n.push(p1);
		n.push(p2);
		n.push(p3);
		WriteRemoteNumeric(n);
	}

	template <typename T1, typename T2, typename T3, typename T4>
	void WriteRemoteNumeric(unsigned int numeric, T1 p1, T2 p2, T3 p3, T4 p4)
	{
		Numeric::Numeric n(numeric);
		n.push(p1);
		n.push(p2);
		n.push(p3);
		n.push(p4);
		WriteRemoteNumeric(n);
	}

	template <typename T1, typename T2, typename T3, typename T4, typename T5>
	void WriteRemoteNumeric(unsigned int numeric, T1 p1, T2 p2, T3 p3, T4 p4, T5 p5)
	{
		Numeric::Numeric n(numeric);
		n.push(p1);
		n.push(p2);
		n.push(p3);
		n.push(p4);
		n.push(p5);
		WriteRemoteNumeric(n);
	}

	void WriteNumeric(const Numeric::Numeric& numeric);

	template <typename T1>
	void WriteNumeric(unsigned int numeric, T1 p1)
	{
		Numeric::Numeric n(numeric);
		n.push(p1);
		WriteNumeric(n);
	}

	template <typename T1, typename T2>
	void WriteNumeric(unsigned int numeric, T1 p1, T2 p2)
	{
		Numeric::Numeric n(numeric);
		n.push(p1);
		n.push(p2);
		WriteNumeric(n);
	}

	template <typename T1, typename T2, typename T3>
	void WriteNumeric(unsigned int numeric, T1 p1, T2 p2, T3 p3)
	{
		Numeric::Numeric n(numeric);
		n.push(p1);
		n.push(p2);
		n.push(p3);
		WriteNumeric(n);
	}

	template <typename T1, typename T2, typename T3, typename T4>
	void WriteNumeric(unsigned int numeric, T1 p1, T2 p2, T3 p3, T4 p4)
	{
		Numeric::Numeric n(numeric);
		n.push(p1);
		n.push(p2);
		n.push(p3);
		n.push(p4);
		WriteNumeric(n);
	}

	template <typename T1, typename T2, typename T3, typename T4, typename T5>
	void WriteNumeric(unsigned int numeric, T1 p1, T2 p2, T3 p3, T4 p4, T5 p5)
	{
		Numeric::Numeric n(numeric);
		n.push(p1);
		n.push(p2);
		n.push(p3);
		n.push(p4);
		n.push(p5);
		WriteNumeric(n);
	}

	/** Write to all users that can see this user (including this user in the list if include_self is true), appending CR/LF
	 * @param protoev Protocol event to send, may contain any number of messages.
	 * @param include_self Should the message be sent back to the author?
	 */
	void WriteCommonRaw(ClientProtocol::Event& protoev, bool include_self = true);

	/** Execute a function once for each local neighbor of this user. By default, the neighbors of a user are the users
	 * who have at least one common channel with the user. Modules are allowed to alter the set of neighbors freely.
	 * This function is used for example to send something conditionally to neighbors, or to send different messages
	 * to different users depending on their oper status.
	 * @param handler Function object to call, inherited from ForEachNeighborHandler.
	 * @param include_self True to include this user in the set of neighbors, false otherwise.
	 * Modules may override this. Has no effect if this user is not local.
	 */
	void ForEachNeighbor(ForEachNeighborHandler& handler, bool include_self = true);

	/** Return true if the user shares at least one channel with another user
	 * @param other The other user to compare the channel list against
	 * @return True if the given user shares at least one channel with this user
	 */
	bool SharesChannelWith(User *other);

	/** Change the displayed hostname of this user.
	 * @param host The new displayed hostname of this user.
	 * @return True if the hostname was changed successfully; otherwise, false.
	 */
	bool ChangeDisplayedHost(const std::string& host);

	/** Change the real hostname of this user.
	 * @param host The new real hostname of this user.
	 * @param resetdisplay Whether to reset the display host to this value.
	 */
	void ChangeRealHost(const std::string& host, bool resetdisplay);

	/** Change the ident (username) of a user.
	 * ALWAYS use this function, rather than writing User::ident directly,
	 * as this triggers module events allowing the change to be syncronized to
	 * remote servers.
	 * @param newident The new ident to set
	 * @return True if the change succeeded, false if it didn't
	 */
	bool ChangeIdent(const std::string& newident);

	/** Change a users realname field.
	 * @param real The user's new real name
	 * @return True if the change succeeded, false if otherwise
	 */
	bool ChangeRealName(const std::string& real);

	/** Change a user's nick
	 * @param newnick The new nick. If equal to the users uuid, the nick change always succeeds.
	 * @param newts The time at which this nick change happened.
	 * @return True if the change succeeded
	 */
	bool ChangeNick(const std::string& newnick, time_t newts = 0);

	/** Remove this user from all channels they are on, and delete any that are now empty.
	 * This is used by QUIT, and will not send part messages!
	 */
	void PurgeEmptyChannels();

	/** Default destructor
	 */
	virtual ~User();
	CullResult cull() CXX11_OVERRIDE;

	/** @copydoc Serializable::Deserialize */
	bool Deserialize(Data& data) CXX11_OVERRIDE;

	/** @copydoc Serializable::Deserialize */
	bool Serialize(Serializable::Data& data) CXX11_OVERRIDE;
};

class CoreExport UserIOHandler : public StreamSocket
{
 private:
	 size_t checked_until;
 public:
	LocalUser* const user;
	UserIOHandler(LocalUser* me)
		: StreamSocket(StreamSocket::SS_USER)
		, checked_until(0)
		, user(me)
	{
	}
	void OnDataReady() CXX11_OVERRIDE;
	bool OnSetEndPoint(const irc::sockets::sockaddrs& local, const irc::sockets::sockaddrs& remote) CXX11_OVERRIDE;
	void OnError(BufferedSocketError error) CXX11_OVERRIDE;

	/** Adds to the user's write buffer.
	 * You may add any amount of text up to this users sendq value, if you exceed the
	 * sendq value, the user will be removed, and further buffer adds will be dropped.
	 * @param data The data to add to the write buffer
	 */
	void AddWriteBuf(const std::string &data);

	/** Swaps the internals of this UserIOHandler with another one.
	 * @param other A UserIOHandler to swap internals with.
	 */
	void SwapInternals(UserIOHandler& other);
};

typedef unsigned int already_sent_t;

class CoreExport LocalUser : public User, public insp::intrusive_list_node<LocalUser>
{
	/** Add a serialized message to the send queue of the user.
	 * @param serialized Bytes to add.
	 */
	void Write(const ClientProtocol::SerializedMessage& serialized);

	/** Send a protocol event to the user, consisting of one or more messages.
	 * @param protoev Event to send, may contain any number of messages.
	 * @param msglist Message list used temporarily internally to pass to hooks and store messages
	 * before Write().
	 */
	void Send(ClientProtocol::Event& protoev, ClientProtocol::MessageList& msglist);

	/** Message list, can be passed to the two parameter Send().
	 */
	static ClientProtocol::MessageList sendmsglist;

 public:
	LocalUser(int fd, irc::sockets::sockaddrs* client, irc::sockets::sockaddrs* server);
	LocalUser(int fd, const std::string& uuid, Serializable::Data& data);

	CullResult cull() CXX11_OVERRIDE;

	UserIOHandler eh;

	/** Serializer to use when communicating with the user
	 */
	ClientProtocol::Serializer* serializer;

	/** Stats counter for bytes inbound
	 */
	unsigned int bytes_in;

	/** Stats counter for bytes outbound
	 */
	unsigned int bytes_out;

	/** Stats counter for commands inbound
	 */
	unsigned int cmds_in;

	/** Stats counter for commands outbound
	 */
	unsigned int cmds_out;

	/** Password specified by the user when they registered (if any).
	 * This is stored even if the \<connect> block doesnt need a password, so that
	 * modules may check it.
	 */
	std::string password;

	/** Contains a pointer to the connect class a user is on from
	 */
	reference<ConnectClass> MyClass;

	/** Get the connect class which this user belongs to.
	 * @return A pointer to this user's connect class.
	 */
	ConnectClass* GetClass() const { return MyClass; }

	/** Call this method to find the matching \<connect> for a user, and to check them against it.
	 */
	void CheckClass(bool clone_count = true);

	/** Server address and port that this user is connected to.
	 */
	irc::sockets::sockaddrs server_sa;

	/** Recursion fix: user is out of SendQ and will be quit as soon as possible.
	 * This can't be handled normally because QuitUser itself calls Write on other
	 * users, which could trigger their SendQ to overrun.
	 */
	unsigned int quitting_sendq:1;

	/** has the user responded to their previous ping?
	 */
	unsigned int lastping:1;

	/** This is true if the user matched an exception (E-line). It is used to save time on ban checks.
	 */
	unsigned int exempt:1;

	/** The time at which this user should be pinged next. */
	time_t nextping;

	/** Time that the connection last sent a message, used to calculate idle time
	 */
	time_t idle_lastmsg;

	/** This value contains how far into the penalty threshold the user is.
	 * This is used either to enable fake lag or for excess flood quits
	 */
	unsigned int CommandFloodPenalty;

	already_sent_t already_sent;

	/** Check if the user matches a G- or K-line, and disconnect them if they do.
	 * @param doZline True if Z-lines should be checked (if IP has changed since initial connect)
	 * Returns true if the user matched a ban, false else.
	 */
	bool CheckLines(bool doZline = false);

	/** Use this method to fully connect a user.
	 * This will send the message of the day, check G/K/E-lines, etc.
	 */
	void FullConnect();

	/** Set the connect class to which this user belongs to.
	 * @param explicit_name Set this string to tie the user to a specific class name. Otherwise, the class is fitted by checking \<connect> tags from the configuration file.
	 * @return A reference to this user's current connect class.
	 */
	void SetClass(const std::string &explicit_name = "");

	bool SetClientIP(const std::string& address) CXX11_OVERRIDE;

	void SetClientIP(const irc::sockets::sockaddrs& sa) CXX11_OVERRIDE;

	/** Send a NOTICE message from the local server to the user.
	 * The message will be sent even if the user is connected to a remote server.
	 * @param text Text to send
	 */
	void WriteRemoteNotice(const std::string& text) CXX11_OVERRIDE;

	/** Returns true or false for if a user can execute a privilaged oper command.
	 * This is done by looking up their oper type from User::oper, then referencing
	 * this to their oper classes and checking the commands they can execute.
	 * @param command A command (should be all CAPS)
	 * @return True if this user can execute the command
	 */
	bool HasCommandPermission(const std::string& command) CXX11_OVERRIDE;

	/** Returns true if a user has a given permission.
	 * This is used to check whether or not users may perform certain actions which admins may not wish to give to
	 * all operators, yet are not commands. An example might be oper override, mass messaging (/notice $*), etc.
	 *
	 * @param privstr The priv to chec, e.g. "users/override/topic". These are loaded free-form from the config file.
	 * @return True if this user has the permission in question.
	 */
	bool HasPrivPermission(const std::string& privstr) CXX11_OVERRIDE;

	/** Returns true or false if a user can set a privileged user or channel mode.
	 * This is done by looking up their oper type from User::oper, then referencing
	 * this to their oper classes, and checking the modes they can set.
	 * @param mh Mode to check
	 * @return True if the user can set or unset this mode.
	 */
	bool HasModePermission(const ModeHandler* mh) const CXX11_OVERRIDE;

	/** Change nick to uuid, unset REG_NICK and send a nickname overruled numeric.
	 * This is called when another user (either local or remote) needs the nick of this user and this user
	 * isn't registered.
	 */
	void OverruleNick();

	/** Send a protocol event to the user, consisting of one or more messages.
	 * @param protoev Event to send, may contain any number of messages.
	 */
	void Send(ClientProtocol::Event& protoev);

	/** Send a single message to the user.
	 * @param protoevprov Protocol event provider.
	 * @param msg Message to send.
	 */
	void Send(ClientProtocol::EventProvider& protoevprov, ClientProtocol::Message& msg);

	/** @copydoc Serializable::Deserialize */
	bool Deserialize(Data& data) CXX11_OVERRIDE;

	/** @copydoc Serializable::Deserialize */
	bool Serialize(Serializable::Data& data) CXX11_OVERRIDE;
};

class RemoteUser : public User
{
 public:
	RemoteUser(const std::string& uid, Server* srv) : User(uid, srv, USERTYPE_REMOTE)
	{
	}
};

class CoreExport FakeUser : public User
{
 public:
	FakeUser(const std::string& uid, Server* srv)
		: User(uid, srv, USERTYPE_SERVER)
	{
		nick = srv->GetName();
	}

	FakeUser(const std::string& uid, const std::string& sname, const std::string& sdesc)
		: User(uid, new Server(uid, sname, sdesc), USERTYPE_SERVER)
	{
		nick = sname;
	}

	CullResult cull() CXX11_OVERRIDE;
	const std::string& GetFullHost() CXX11_OVERRIDE;
	const std::string& GetFullRealHost() CXX11_OVERRIDE;
};

/* Faster than dynamic_cast */
/** Is a local user */
inline LocalUser* IS_LOCAL(User* u)
{
	return (u != NULL && u->usertype == USERTYPE_LOCAL) ? static_cast<LocalUser*>(u) : NULL;
}
/** Is a remote user */
inline RemoteUser* IS_REMOTE(User* u)
{
	return (u != NULL && u->usertype == USERTYPE_REMOTE) ? static_cast<RemoteUser*>(u) : NULL;
}
/** Is a server fakeuser */
inline FakeUser* IS_SERVER(User* u)
{
	return (u != NULL && u->usertype == USERTYPE_SERVER) ? static_cast<FakeUser*>(u) : NULL;
}

inline bool User::IsModeSet(const ModeHandler* mh) const
{
	return ((mh->GetId() != ModeParser::MODEID_MAX) && (modes[mh->GetId()]));
}

inline bool User::IsModeSet(UserModeReference& moderef) const
{
	if (!moderef)
		return false;
	return IsModeSet(*moderef);
}

inline void User::SetMode(ModeHandler* mh, bool value)
{
	if (mh && mh->GetId() != ModeParser::MODEID_MAX)
		modes[mh->GetId()] = value;
}