aboutsummaryrefslogtreecommitdiff
path: root/rfc2812_commands.txt
blob: 484cf7c5a1720a1e87bd0998d6f888db8e95c096 (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
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
3.1.1 Password message

      Command: PASS
   Parameters: <password>

   The PASS command is used to set a 'connection password'.  The
   optional password can and MUST be set before any attempt to register
   the connection is made.  Currently this requires that user send a
   PASS command before sending the NICK/USER combination.

   Numeric Replies:

           ERR_NEEDMOREPARAMS              ERR_ALREADYREGISTRED

   Example:

           PASS secretpasswordhere

3.1.2 Nick message


      Command: NICK
   Parameters: <nickname>

   NICK command is used to give user a nickname or change the existing
   one.

   Numeric Replies:

           ERR_NONICKNAMEGIVEN             ERR_ERRONEUSNICKNAME
           ERR_NICKNAMEINUSE               ERR_NICKCOLLISION
           ERR_UNAVAILRESOURCE             ERR_RESTRICTED

   Examples:

   NICK Wiz                ; Introducing new nick "Wiz" if session is
                           still unregistered, or user changing his
                           nickname to "Wiz"

   :WiZ!jto@tolsun.oulu.fi NICK Kilroy
                           ; Server telling that WiZ changed his
                           nickname to Kilroy.

3.1.3 User message

      Command: USER
   Parameters: <user> <mode> <unused> <realname>

   The USER command is used at the beginning of connection to specify
   the username, hostname and realname of a new user.

   The <mode> parameter should be a numeric, and can be used to
   automatically set user modes when registering with the server.  This
   parameter is a bitmask, with only 2 bits having any signification: if
   the bit 2 is set, the user mode 'w' will be set and if the bit 3 is
   set, the user mode 'i' will be set.  (See Section 3.1.5 "User
   Modes").

   The <realname> may contain space characters.

   Numeric Replies:

           ERR_NEEDMOREPARAMS              ERR_ALREADYREGISTRED

   Example:

   USER guest 0 * :Ronnie Reagan   ; User registering themselves with a
                                   username of "guest" and real name
                                   "Ronnie Reagan".

   USER guest 8 * :Ronnie Reagan   ; User registering themselves with a
                                   username of "guest" and real name
                                   "Ronnie Reagan", and asking to be set
                                   invisible.

3.1.4 Oper message

      Command: OPER
   Parameters: <name> <password>

   A normal user uses the OPER command to obtain operator privileges.
   The combination of <name> and <password> are REQUIRED to gain
   Operator privileges.  Upon success, the user will receive a MODE
   message (see section 3.1.5) indicating the new user modes.

   Numeric Replies:

           ERR_NEEDMOREPARAMS              RPL_YOUREOPER
           ERR_NOOPERHOST                  ERR_PASSWDMISMATCH

   Example:

   OPER foo bar                    ; Attempt to register as an operator
                                   using a username of "foo" and "bar"
                                   as the password.

3.1.5 User mode message

      Command: MODE
   Parameters: <nickname>
               *( ( "+" / "-" ) *( "i" / "w" / "o" / "O" / "r" ) )

   The user MODE's are typically changes which affect either how the
   client is seen by others or what 'extra' messages the client is sent.

   A user MODE command MUST only be accepted if both the sender of the
   message and the nickname given as a parameter are both the same.  If
   no other parameter is given, then the server will return the current
   settings for the nick.

      The available modes are as follows:

           a - user is flagged as away;
           i - marks a users as invisible;
           w - user receives wallops;
           r - restricted user connection;
           o - operator flag;
           O - local operator flag;
           s - marks a user for receipt of server notices.

   Additional modes may be available later on.

   The flag 'a' SHALL NOT be toggled by the user using the MODE command,
   instead use of the AWAY command is REQUIRED.

   If a user attempts to make themselves an operator using the "+o" or
   "+O" flag, the attempt SHOULD be ignored as users could bypass the
   authentication mechanisms of the OPER command.  There is no
   restriction, however, on anyone `deopping' themselves (using "-o" or
   "-O").

   On the other hand, if a user attempts to make themselves unrestricted
   using the "-r" flag, the attempt SHOULD be ignored.  There is no
   restriction, however, on anyone `deopping' themselves (using "+r").
   This flag is typically set by the server upon connection for
   administrative reasons.  While the restrictions imposed are left up
   to the implementation, it is typical that a restricted user not be
   allowed to change nicknames, nor make use of the channel operator
   status on channels.

   The flag 's' is obsolete but MAY still be used.

   Numeric Replies:

           ERR_NEEDMOREPARAMS              ERR_USERSDONTMATCH
           ERR_UMODEUNKNOWNFLAG            RPL_UMODEIS

   Examples:

   MODE WiZ -w                     ; Command by WiZ to turn off
                                   reception of WALLOPS messages.

   MODE Angel +i                   ; Command from Angel to make herself
                                   invisible.

   MODE WiZ -o                     ; WiZ 'deopping' (removing operator
                                   status).

3.1.6 Service message

      Command: SERVICE
   Parameters: <nickname> <reserved> <distribution> <type>
               <reserved> <info>

   The SERVICE command to register a new service.  Command parameters
   specify the service nickname, distribution, type and info of a new
   service.

   The <distribution> parameter is used to specify the visibility of a
   service.  The service may only be known to servers which have a name
   matching the distribution.  For a matching server to have knowledge
   of the service, the network path between that server and the server
   on which the service is connected MUST be composed of servers which
   names all match the mask.

   The <type> parameter is currently reserved for future usage.

   Numeric Replies:

           ERR_ALREADYREGISTRED            ERR_NEEDMOREPARAMS
           ERR_ERRONEUSNICKNAME
           RPL_YOURESERVICE                RPL_YOURHOST
           RPL_MYINFO

   Example:

   SERVICE dict * *.fr 0 0 :French Dictionary ; Service registering
                                   itself with a name of "dict".  This
                                   service will only be available on
                                   servers which name matches "*.fr".

3.1.7 Quit

      Command: QUIT
   Parameters: [ <Quit Message> ]

   A client session is terminated with a quit message.  The server
   acknowledges this by sending an ERROR message to the client.

   Numeric Replies:

           None.

   Example:

   QUIT :Gone to have lunch        ; Preferred message format.

   :syrk!kalt@millennium.stealth.net QUIT :Gone to have lunch ; User
                                   syrk has quit IRC to have lunch.

3.1.8 Squit

      Command: SQUIT
   Parameters: <server> <comment>

   The SQUIT command is available only to operators.  It is used to
   disconnect server links.  Also servers can generate SQUIT messages on
   error conditions.  A SQUIT message may also target a remote server
   connection.  In this case, the SQUIT message will simply be sent to
   the remote server without affecting the servers in between the
   operator and the remote server.

   The <comment> SHOULD be supplied by all operators who execute a SQUIT
   for a remote server.  The server ordered to disconnect its peer
   generates a WALLOPS message with <comment> included, so that other
   users may be aware of the reason of this action.

   Numeric replies:

           ERR_NOPRIVILEGES                ERR_NOSUCHSERVER
           ERR_NEEDMOREPARAMS

   Examples:

   SQUIT tolsun.oulu.fi :Bad Link ?  ; Command to uplink of the server
                                   tolson.oulu.fi to terminate its
                                   connection with comment "Bad Link".

   :Trillian SQUIT cm22.eng.umd.edu :Server out of control ; Command
                                   from Trillian from to disconnect
                                   "cm22.eng.umd.edu" from the net with
                                   comment "Server out of control".

3.2.1 Join message

      Command: JOIN
   Parameters: ( <channel> *( "," <channel> ) [ <key> *( "," <key> ) ] )
               / "0"

   The JOIN command is used by a user to request to start listening to
   the specific channel.  Servers MUST be able to parse arguments in the
   form of a list of target, but SHOULD NOT use lists when sending JOIN
   messages to clients.

   Once a user has joined a channel, he receives information about
   all commands his server receives affecting the channel.  This
   includes JOIN, MODE, KICK, PART, QUIT and of course PRIVMSG/NOTICE.
   This allows channel members to keep track of the other channel
   members, as well as channel modes.

   If a JOIN is successful, the user receives a JOIN message as
   confirmation and is then sent the channel's topic (using RPL_TOPIC) and
   the list of users who are on the channel (using RPL_NAMREPLY), which
   MUST include the user joining.

   Note that this message accepts a special argument ("0"), which is
   a special request to leave all channels the user is currently a member
   of.  The server will process this message as if the user had sent
   a PART command (See Section 3.2.2) for each channel he is a member
   of.

   Numeric Replies:

           ERR_NEEDMOREPARAMS              ERR_BANNEDFROMCHAN
           ERR_INVITEONLYCHAN              ERR_BADCHANNELKEY
           ERR_CHANNELISFULL               ERR_BADCHANMASK
           ERR_NOSUCHCHANNEL               ERR_TOOMANYCHANNELS
           ERR_TOOMANYTARGETS              ERR_UNAVAILRESOURCE
           RPL_TOPIC

   Examples:

   JOIN #foobar                    ; Command to join channel #foobar.

   JOIN &foo fubar                 ; Command to join channel &foo using
                                   key "fubar".

   JOIN #foo,&bar fubar            ; Command to join channel #foo using
                                   key "fubar" and &bar using no key.

   JOIN #foo,#bar fubar,foobar     ; Command to join channel #foo using
                                   key "fubar", and channel #bar using
                                   key "foobar".

   JOIN #foo,#bar                  ; Command to join channels #foo and
                                   #bar.

   JOIN 0                          ; Leave all currently joined
                                   channels.

   :WiZ!jto@tolsun.oulu.fi JOIN #Twilight_zone ; JOIN message from WiZ
                                   on channel #Twilight_zone

3.2.2 Part message

      Command: PART
   Parameters: <channel> *( "," <channel> ) [ <Part Message> ]

   The PART command causes the user sending the message to be removed
   from the list of active members for all given channels listed in the
   parameter string.  If a "Part Message" is given, this will be sent
   instead of the default message, the nickname.  This request is always
   granted by the server.

   Servers MUST be able to parse arguments in the form of a list of
   target, but SHOULD NOT use lists when sending PART messages to
   clients.

   Numeric Replies:

           ERR_NEEDMOREPARAMS              ERR_NOSUCHCHANNEL
           ERR_NOTONCHANNEL

   Examples:

   PART #twilight_zone             ; Command to leave channel
                                   "#twilight_zone"

   PART #oz-ops,&group5            ; Command to leave both channels
                                   "&group5" and "#oz-ops".

   :WiZ!jto@tolsun.oulu.fi PART #playzone :I lost
                                   ; User WiZ leaving channel
                                   "#playzone" with the message "I
                                   lost".

3.2.3 Channel mode message

      Command: MODE
   Parameters: <channel> *( ( "-" / "+" ) *<modes> *<modeparams> )

   The MODE command is provided so that users may query and change the
   characteristics of a channel.  For more details on available modes
   and their uses, see "Internet Relay Chat: Channel Management" [IRC-
   CHAN].  Note that there is a maximum limit of three (3) changes per
   command for modes that take a parameter.

   Numeric Replies:

           ERR_NEEDMOREPARAMS              ERR_KEYSET
           ERR_NOCHANMODES                 ERR_CHANOPRIVSNEEDED
           ERR_USERNOTINCHANNEL            ERR_UNKNOWNMODE
           RPL_CHANNELMODEIS
           RPL_BANLIST                     RPL_ENDOFBANLIST
           RPL_EXCEPTLIST                  RPL_ENDOFEXCEPTLIST
           RPL_INVITELIST                  RPL_ENDOFINVITELIST
           RPL_UNIQOPIS

   The following examples are given to help understanding the syntax of
   the MODE command, but refer to modes defined in "Internet Relay Chat:
   Channel Management" [IRC-CHAN].

   Examples:

   MODE #Finnish +imI *!*@*.fi     ; Command to make #Finnish channel
                                   moderated and 'invite-only' with user
                                   with a hostname matching *.fi
                                   automatically invited.

   MODE #Finnish +o Kilroy         ; Command to give 'chanop' privileges
                                   to Kilroy on channel #Finnish.

   MODE #Finnish +v Wiz            ; Command to allow WiZ to speak on
                                   #Finnish.

   MODE #Fins -s                   ; Command to remove 'secret' flag
                                   from channel #Fins.

   MODE #42 +k oulu                ; Command to set the channel key to
                                   "oulu".

   MODE #42 -k oulu                ; Command to remove the "oulu"
                                   channel key on channel "#42".

   MODE #eu-opers +l 10            ; Command to set the limit for the
                                   number of users on channel
                                   "#eu-opers" to 10.

   :WiZ!jto@tolsun.oulu.fi MODE #eu-opers -l
                                   ; User "WiZ" removing the limit for
                                   the number of users on channel "#eu-
                                   opers".

   MODE &oulu +b                   ; Command to list ban masks set for
                                   the channel "&oulu".

   MODE &oulu +b *!*@*             ; Command to prevent all users from
                                   joining.

   MODE &oulu +b *!*@*.edu +e *!*@*.bu.edu
                                   ; Command to prevent any user from a
                                   hostname matching *.edu from joining,
                                   except if matching *.bu.edu

   MODE #bu +be *!*@*.edu *!*@*.bu.edu
                                   ; Comment to prevent any user from a
                                   hostname matching *.edu from joining,
                                   except if matching *.bu.edu

   MODE #meditation e              ; Command to list exception masks set
                                   for the channel "#meditation".

   MODE #meditation I              ; Command to list invitations masks
                                   set for the channel "#meditation".

   MODE !12345ircd O               ; Command to ask who the channel
                                   creator for "!12345ircd" is

3.2.4 Topic message

      Command: TOPIC
   Parameters: <channel> [ <topic> ]

   The TOPIC command is used to change or view the topic of a channel.
   The topic for channel <channel> is returned if there is no <topic>
   given.  If the <topic> parameter is present, the topic for that
   channel will be changed, if this action is allowed for the user
   requesting it.  If the <topic> parameter is an empty string, the
   topic for that channel will be removed.

   Numeric Replies:

           ERR_NEEDMOREPARAMS              ERR_NOTONCHANNEL
           RPL_NOTOPIC                     RPL_TOPIC
           ERR_CHANOPRIVSNEEDED            ERR_NOCHANMODES

   Examples:

   :WiZ!jto@tolsun.oulu.fi TOPIC #test :New topic ; User Wiz setting the
                                   topic.

   TOPIC #test :another topic      ; Command to set the topic on #test
                                   to "another topic".

   TOPIC #test :                   ; Command to clear the topic on
                                   #test.

   TOPIC #test                     ; Command to check the topic for
                                   #test.

3.2.5 Names message

      Command: NAMES
   Parameters: [ <channel> *( "," <channel> ) [ <target> ] ]

   By using the NAMES command, a user can list all nicknames that are
   visible to him. For more details on what is visible and what is not,
   see "Internet Relay Chat: Channel Management" [IRC-CHAN].  The
   <channel> parameter specifies which channel(s) to return information
   about.  There is no error reply for bad channel names.

   If no <channel> parameter is given, a list of all channels and their
   occupants is returned.  At the end of this list, a list of users who
   are visible but either not on any channel or not on a visible channel
   are listed as being on `channel' "*".

   If the <target> parameter is specified, the request is forwarded to
   that server which will generate the reply.

   Wildcards are allowed in the <target> parameter.

   Numerics:

           ERR_TOOMANYMATCHES              ERR_NOSUCHSERVER
           RPL_NAMREPLY                    RPL_ENDOFNAMES

   Examples:

   NAMES #twilight_zone,#42        ; Command to list visible users on
                                   #twilight_zone and #42

   NAMES                           ; Command to list all visible
                                   channels and users

3.2.6 List message

      Command: LIST
   Parameters: [ <channel> *( "," <channel> ) [ <target> ] ]

   The list command is used to list channels and their topics.  If the
   <channel> parameter is used, only the status of that channel is
   displayed.

   If the <target> parameter is specified, the request is forwarded to
   that server which will generate the reply.

   Wildcards are allowed in the <target> parameter.

   Numeric Replies:

           ERR_TOOMANYMATCHES              ERR_NOSUCHSERVER
           RPL_LIST                        RPL_LISTEND

   Examples:

   LIST                            ; Command to list all channels.

   LIST #twilight_zone,#42         ; Command to list channels
                                   #twilight_zone and #42

3.2.7 Invite message

      Command: INVITE
   Parameters: <nickname> <channel>

   The INVITE command is used to invite a user to a channel.  The
   parameter <nickname> is the nickname of the person to be invited to
   the target channel <channel>.  There is no requirement that the
   channel the target user is being invited to must exist or be a valid
   channel.  However, if the channel exists, only members of the channel
   are allowed to invite other users.  When the channel has invite-only
   flag set, only channel operators may issue INVITE command.

   Only the user inviting and the user being invited will receive
   notification of the invitation.  Other channel members are not
   notified.  (This is unlike the MODE changes, and is occasionally the
   source of trouble for users.)

   Numeric Replies:

           ERR_NEEDMOREPARAMS              ERR_NOSUCHNICK
           ERR_NOTONCHANNEL                ERR_USERONCHANNEL
           ERR_CHANOPRIVSNEEDED
           RPL_INVITING                    RPL_AWAY

   Examples:

   :Angel!wings@irc.org INVITE Wiz #Dust

                                   ; Message to WiZ when he has been
                                   invited by user Angel to channel
                                   #Dust

   INVITE Wiz #Twilight_Zone       ; Command to invite WiZ to
                                   #Twilight_zone

3.2.8 Kick command

      Command: KICK
   Parameters: <channel> *( "," <channel> ) <user> *( "," <user> )
               [<comment>]

   The KICK command can be used to request the forced removal of a user
   from a channel.  It causes the <user> to PART from the <channel> by
   force.  For the message to be syntactically correct, there MUST be
   either one channel parameter and multiple user parameter, or as many
   channel parameters as there are user parameters.  If a "comment" is
   given, this will be sent instead of the default message, the nickname
   of the user issuing the KICK.

   The server MUST NOT send KICK messages with multiple channels or
   users to clients.  This is necessarily to maintain backward
   compatibility with old client software.

   Numeric Replies:

           ERR_NEEDMOREPARAMS              ERR_NOSUCHCHANNEL
           ERR_BADCHANMASK                 ERR_CHANOPRIVSNEEDED
           ERR_USERNOTINCHANNEL            ERR_NOTONCHANNEL

   Examples:

   KICK &Melbourne Matthew         ; Command to kick Matthew from
                                   &Melbourne

   KICK #Finnish John :Speaking English
                                   ; Command to kick John from #Finnish
                                   using "Speaking English" as the
                                   reason (comment).

   :WiZ!jto@tolsun.oulu.fi KICK #Finnish John
                                   ; KICK message on channel #Finnish
                                   from WiZ to remove John from channel

3.3.1 Private messages

      Command: PRIVMSG
   Parameters: <msgtarget> <text to be sent>

   PRIVMSG is used to send private messages between users, as well as to
   send messages to channels.  <msgtarget> is usually the nickname of
   the recipient of the message, or a channel name.

   The <msgtarget> parameter may also be a host mask (#<mask>) or server
   mask ($<mask>).  In both cases the server will only send the PRIVMSG
   to those who have a server or host matching the mask.  The mask MUST
   have at least 1 (one) "." in it and no wildcards following the last
   ".".  This requirement exists to prevent people sending messages to
   "#*" or "$*", which would broadcast to all users.  Wildcards are the
   '*' and '?'  characters.  This extension to the PRIVMSG command is
   only available to operators.

   Numeric Replies:

           ERR_NORECIPIENT                 ERR_NOTEXTTOSEND
           ERR_CANNOTSENDTOCHAN            ERR_NOTOPLEVEL
           ERR_WILDTOPLEVEL                ERR_TOOMANYTARGETS
           ERR_NOSUCHNICK
           RPL_AWAY

   Examples:

   :Angel!wings@irc.org PRIVMSG Wiz :Are you receiving this message ?
                                   ; Message from Angel to Wiz.

   PRIVMSG Angel :yes I'm receiving it !
                                   ; Command to send a message to Angel.

   PRIVMSG jto@tolsun.oulu.fi :Hello !
                                   ; Command to send a message to a user
                                   on server tolsun.oulu.fi with
                                   username of "jto".

   PRIVMSG kalt%millennium.stealth.net@irc.stealth.net :Are you a frog?
                                   ; Message to a user on server
                                   irc.stealth.net with username of
                                   "kalt", and connected from the host
                                   millennium.stealth.net.

   PRIVMSG kalt%millennium.stealth.net :Do you like cheese?
                                   ; Message to a user on the local
                                   server with username of "kalt", and
                                   connected from the host
                                   millennium.stealth.net.

   PRIVMSG Wiz!jto@tolsun.oulu.fi :Hello !
                                   ; Message to the user with nickname
                                   Wiz who is connected from the host
                                   tolsun.oulu.fi and has the username
                                   "jto".

   PRIVMSG $*.fi :Server tolsun.oulu.fi rebooting.
                                   ; Message to everyone on a server
                                   which has a name matching *.fi.

   PRIVMSG #*.edu :NSFNet is undergoing work, expect interruptions
                                   ; Message to all users who come from
                                   a host which has a name matching
                                   *.edu.

3.3.2 Notice

      Command: NOTICE
   Parameters: <msgtarget> <text>

   The NOTICE command is used similarly to PRIVMSG.  The difference
   between NOTICE and PRIVMSG is that automatic replies MUST NEVER be
   sent in response to a NOTICE message.  This rule applies to servers
   too - they MUST NOT send any error reply back to the client on
   receipt of a notice.  The object of this rule is to avoid loops
   between clients automatically sending something in response to
   something it received.

   This command is available to services as well as users.

   This is typically used by services, and automatons (clients with
   either an AI or other interactive program controlling their actions).

   See PRIVMSG for more details on replies and examples.

3.4.1 Motd message

      Command: MOTD
   Parameters: [ <target> ]

   The MOTD command is used to get the "Message Of The Day" of the given
   server, or current server if <target> is omitted.

   Wildcards are allowed in the <target> parameter.

   Numeric Replies:
           RPL_MOTDSTART                   RPL_MOTD
           RPL_ENDOFMOTD                   ERR_NOMOTD

3.4.2 Lusers message

      Command: LUSERS
   Parameters: [ <mask> [ <target> ] ]

   The LUSERS command is used to get statistics about the size of the
   IRC network.  If no parameter is given, the reply will be about the
   whole net.  If a <mask> is specified, then the reply will only
   concern the part of the network formed by the servers matching the
   mask.  Finally, if the <target> parameter is specified, the request
   is forwarded to that server which will generate the reply.

   Wildcards are allowed in the <target> parameter.

   Numeric Replies:

           RPL_LUSERCLIENT                 RPL_LUSEROP
           RPL_LUSERUNKOWN                 RPL_LUSERCHANNELS
           RPL_LUSERME                     ERR_NOSUCHSERVER

3.4.3 Version message

      Command: VERSION
   Parameters: [ <target> ]

   The VERSION command is used to query the version of the server
   program.  An optional parameter <target> is used to query the version
   of the server program which a client is not directly connected to.

   Wildcards are allowed in the <target> parameter.

   Numeric Replies:

           ERR_NOSUCHSERVER                RPL_VERSION

   Examples:

   VERSION tolsun.oulu.fi          ; Command to check the version of
                                   server "tolsun.oulu.fi".

3.4.4 Stats message

      Command: STATS
   Parameters: [ <query> [ <target> ] ]

   The stats command is used to query statistics of certain server.  If
   <query> parameter is omitted, only the end of stats reply is sent
   back.

   A query may be given for any single letter which is only checked by
   the destination server and is otherwise passed on by intermediate
   servers, ignored and unaltered.

   Wildcards are allowed in the <target> parameter.

   Except for the ones below, the list of valid queries is
   implementation dependent.  The standard queries below SHOULD be
   supported by the server:

            l - returns a list of the server's connections, showing how
                long each connection has been established and the
                traffic over that connection in Kbytes and messages for
                each direction;
            m - returns the usage count for each of commands supported
                by the server; commands for which the usage count is
                zero MAY be omitted;
            o - returns a list of configured privileged users,
                operators;
            u - returns a string showing how long the server has been
                up.

   It is also RECOMMENDED that client and server access configuration be
   published this way.

   Numeric Replies:

           ERR_NOSUCHSERVER
           RPL_STATSLINKINFO                RPL_STATSUPTIME
           RPL_STATSCOMMANDS                RPL_STATSOLINE
           RPL_ENDOFSTATS

   Examples:

   STATS m                         ; Command to check the command usage
                                   for the server you are connected to

3.4.5 Links message

      Command: LINKS
   Parameters: [ [ <remote server> ] <server mask> ]

   With LINKS, a user can list all servernames, which are known by the
   server answering the query.  The returned list of servers MUST match
   the mask, or if no mask is given, the full list is returned.

   If <remote server> is given in addition to <server mask>, the LINKS
   command is forwarded to the first server found that matches that name
   (if any), and that server is then required to answer the query.

   Numeric Replies:

           ERR_NOSUCHSERVER
           RPL_LINKS                        RPL_ENDOFLINKS

   Examples:

   LINKS *.au                      ; Command to list all servers which
                                   have a name that matches *.au;

   LINKS *.edu *.bu.edu            ; Command to list servers matching
                                   *.bu.edu as seen by the first server
                                   matching *.edu.

3.4.6 Time message

      Command: TIME
   Parameters: [ <target> ]

   The time command is used to query local time from the specified
   server. If the <target> parameter is not given, the server receiving
   the command must reply to the query.

   Wildcards are allowed in the <target> parameter.

   Numeric Replies:

           ERR_NOSUCHSERVER              RPL_TIME

   Examples:
   TIME tolsun.oulu.fi             ; check the time on the server
                                   "tolson.oulu.fi"

3.4.7 Connect message

      Command: CONNECT
   Parameters: <target server> <port> [ <remote server> ]

   The CONNECT command can be used to request a server to try to
   establish a new connection to another server immediately.  CONNECT is
   a privileged command and SHOULD be available only to IRC Operators.
   If a <remote server> is given and its mask doesn't match name of the
   parsing server, the CONNECT attempt is sent to the first match of
   remote server. Otherwise the CONNECT attempt is made by the server
   processing the request.

   The server receiving a remote CONNECT command SHOULD generate a
   WALLOPS message describing the source and target of the request.

   Numeric Replies:

           ERR_NOSUCHSERVER              ERR_NOPRIVILEGES
           ERR_NEEDMOREPARAMS

   Examples:

   CONNECT tolsun.oulu.fi 6667     ; Command to attempt to connect local
                                   server to tolsun.oulu.fi on port 6667

3.4.8 Trace message

      Command: TRACE
   Parameters: [ <target> ]

   TRACE command is used to find the route to specific server and
   information about its peers.  Each server that processes this command
   MUST report to the sender about it.  The replies from pass-through
   links form a chain, which shows route to destination.  After sending
   this reply back, the query MUST be sent to the next server until
   given <target> server is reached.

   TRACE command is used to find the route to specific server.  Each
   server that processes this message MUST tell the sender about it by
   sending a reply indicating it is a pass-through link, forming a chain
   of replies.  After sending this reply back, it MUST then send the
   TRACE message to the next server until given server is reached.  If
   the <target> parameter is omitted, it is RECOMMENDED that TRACE
   command sends a message to the sender telling which servers the local
   server has direct connection to.

   If the destination given by <target> is an actual server, the
   destination server is REQUIRED to report all servers, services and
   operators which are connected to it; if the command was issued by an
   operator, the server MAY also report all users which are connected to
   it.  If the destination given by <target> is a nickname, then only a
   reply for that nickname is given.  If the <target> parameter is
   omitted, it is RECOMMENDED that the TRACE command is parsed as
   targeted to the processing server.

   Wildcards are allowed in the <target> parameter.

   Numeric Replies:

           ERR_NOSUCHSERVER

      If the TRACE message is destined for another server, all
      intermediate servers must return a RPL_TRACELINK reply to indicate
      that the TRACE passed through it and where it is going next.

           RPL_TRACELINK

      A TRACE reply may be composed of any number of the following
      numeric replies.

           RPL_TRACECONNECTING           RPL_TRACEHANDSHAKE
           RPL_TRACEUNKNOWN              RPL_TRACEOPERATOR
           RPL_TRACEUSER                 RPL_TRACESERVER
           RPL_TRACESERVICE              RPL_TRACENEWTYPE
           RPL_TRACECLASS                RPL_TRACELOG
           RPL_TRACEEND

   Examples:

   TRACE *.oulu.fi                 ; TRACE to a server matching
                                   *.oulu.fi

3.4.9 Admin command

      Command: ADMIN
   Parameters: [ <target> ]

   The admin command is used to find information about the administrator
   of the given server, or current server if <target> parameter is
   omitted.  Each server MUST have the ability to forward ADMIN messages
   to other servers.

   Wildcards are allowed in the <target> parameter.

   Numeric Replies:

           ERR_NOSUCHSERVER
           RPL_ADMINME                   RPL_ADMINLOC1
           RPL_ADMINLOC2                 RPL_ADMINEMAIL

   Examples:

   ADMIN tolsun.oulu.fi            ; request an ADMIN reply from
                                   tolsun.oulu.fi

   ADMIN syrk                      ; ADMIN request for the server to
                                   which the user syrk is connected

3.4.10 Info command

      Command: INFO
   Parameters: [ <target> ]

   The INFO command is REQUIRED to return information describing the
   server: its version, when it was compiled, the patchlevel, when it
   was started, and any other miscellaneous information which may be
   considered to be relevant.

   Wildcards are allowed in the <target> parameter.

   Numeric Replies:

           ERR_NOSUCHSERVER
           RPL_INFO                      RPL_ENDOFINFO

   Examples:

   INFO csd.bu.edu                 ; request an INFO reply from
                                   csd.bu.edu

   INFO Angel                      ; request info from the server that
                                   Angel is connected to.

3.5.1 Servlist message

      Command: SERVLIST
   Parameters: [ <mask> [ <type> ] ]

   The SERVLIST command is used to list services currently connected to
   the network and visible to the user issuing the command.  The
   optional parameters may be used to restrict the result of the query
   (to matching services names, and services type).

   Numeric Replies:

           RPL_SERVLIST                  RPL_SERVLISTEND

3.5.2 Squery

      Command: SQUERY
   Parameters: <servicename> <text>

   The SQUERY command is used similarly to PRIVMSG.  The only difference
   is that the recipient MUST be a service.  This is the only way for a
   text message to be delivered to a service.

   See PRIVMSG for more details on replies and example.

   Examples:

   SQUERY irchelp :HELP privmsg
                                   ; Message to the service with
                                   nickname irchelp.

   SQUERY dict@irc.fr :fr2en blaireau
                                   ; Message to the service with name
                                   dict@irc.fr.

3.6.1 Who query

      Command: WHO
   Parameters: [ <mask> [ "o" ] ]

   The WHO command is used by a client to generate a query which returns
   a list of information which 'matches' the <mask> parameter given by
   the client.  In the absence of the <mask> parameter, all visible
   (users who aren't invisible (user mode +i) and who don't have a
   common channel with the requesting client) are listed.  The same
   result can be achieved by using a <mask> of "0" or any wildcard which
   will end up matching every visible user.

   The <mask> passed to WHO is matched against users' host, server, real
   name and nickname if the channel <mask> cannot be found.

   If the "o" parameter is passed only operators are returned according
   to the <mask> supplied.

   Numeric Replies:

           ERR_NOSUCHSERVER
           RPL_WHOREPLY                  RPL_ENDOFWHO

   Examples:

   WHO *.fi                        ; Command to list all users who match
                                   against "*.fi".

   WHO jto* o                      ; Command to list all users with a
                                   match against "jto*" if they are an
                                   operator.

3.6.2 Whois query

      Command: WHOIS
   Parameters: [ <target> ] <mask> *( "," <mask> )

   This command is used to query information about particular user.
   The server will answer this command with several numeric messages
   indicating different statuses of each user which matches the mask (if
   you are entitled to see them).  If no wildcard is present in the
   <mask>, any information about that nick which you are allowed to see
   is presented.

   If the <target> parameter is specified, it sends the query to a
   specific server.  It is useful if you want to know how long the user
   in question has been idle as only local server (i.e., the server the
   user is directly connected to) knows that information, while
   everything else is globally known.

   Wildcards are allowed in the <target> parameter.

   Numeric Replies:

           ERR_NOSUCHSERVER              ERR_NONICKNAMEGIVEN
           RPL_WHOISUSER                 RPL_WHOISCHANNELS
           RPL_WHOISCHANNELS             RPL_WHOISSERVER
           RPL_AWAY                      RPL_WHOISOPERATOR
           RPL_WHOISIDLE                 ERR_NOSUCHNICK
           RPL_ENDOFWHOIS

   Examples:

   WHOIS wiz                       ; return available user information
                                   about nick WiZ

   WHOIS eff.org trillian          ; ask server eff.org for user
                                   information  about trillian

3.6.3 Whowas

      Command: WHOWAS
   Parameters: <nickname> *( "," <nickname> ) [ <count> [ <target> ] ]

   Whowas asks for information about a nickname which no longer exists.
   This may either be due to a nickname change or the user leaving IRC.
   In response to this query, the server searches through its nickname
   history, looking for any nicks which are lexically the same (no wild
   card matching here).  The history is searched backward, returning the
   most recent entry first.  If there are multiple entries, up to
   <count> replies will be returned (or all of them if no <count>
   parameter is given).  If a non-positive number is passed as being
   <count>, then a full search is done.

   Wildcards are allowed in the <target> parameter.

   Numeric Replies:

           ERR_NONICKNAMEGIVEN           ERR_WASNOSUCHNICK
           RPL_WHOWASUSER                RPL_WHOISSERVER
           RPL_ENDOFWHOWAS

   Examples:

   WHOWAS Wiz                      ; return all information in the nick
                                   history about nick "WiZ";

   WHOWAS Mermaid 9                ; return at most, the 9 most recent
                                   entries in the nick history for
                                   "Mermaid";

   WHOWAS Trillian 1 *.edu         ; return the most recent history for
                                   "Trillian" from the first server
                                   found to match "*.edu".

3.7.1 Kill message

      Command: KILL
   Parameters: <nickname> <comment>

   The KILL command is used to cause a client-server connection to be
   closed by the server which has the actual connection.  Servers
   generate KILL messages on nickname collisions.  It MAY also be
   available available to users who have the operator status.

   Clients which have automatic reconnect algorithms effectively make
   this command useless since the disconnection is only brief.  It does
   however break the flow of data and can be used to stop large amounts
   of 'flooding' from abusive users or accidents.  Abusive users usually
   don't care as they will reconnect promptly and resume their abusive
   behaviour.  To prevent this command from being abused, any user may
   elect to receive KILL messages generated for others to keep an 'eye'
   on would be trouble spots.

   In an arena where nicknames are REQUIRED to be globally unique at all
   times, KILL messages are sent whenever 'duplicates' are detected
   (that is an attempt to register two users with the same nickname) in
   the hope that both of them will disappear and only 1 reappear.

   When a client is removed as the result of a KILL message, the server
   SHOULD add the nickname to the list of unavailable nicknames in an
   attempt to avoid clients to reuse this name immediately which is
   usually the pattern of abusive behaviour often leading to useless
   "KILL loops".  See the "IRC Server Protocol" document [IRC-SERVER]
   for more information on this procedure.

   The comment given MUST reflect the actual reason for the KILL.  For
   server-generated KILLs it usually is made up of details concerning
   the origins of the two conflicting nicknames.  For users it is left
   up to them to provide an adequate reason to satisfy others who see
   it.  To prevent/discourage fake KILLs from being generated to hide
   the identify of the KILLer, the comment also shows a 'kill-path'
   which is updated by each server it passes through, each prepending
   its name to the path.

   Numeric Replies:

           ERR_NOPRIVILEGES              ERR_NEEDMOREPARAMS
           ERR_NOSUCHNICK                ERR_CANTKILLSERVER

   NOTE:
   It is RECOMMENDED that only Operators be allowed to kill other users
   with KILL command.  This command has been the subject of many
   controversies over the years, and along with the above
   recommendation, it is also widely recognized that not even operators
   should be allowed to kill users on remote servers.

3.7.2 Ping message

      Command: PING
   Parameters: <server1> [ <server2> ]

   The PING command is used to test the presence of an active client or
   server at the other end of the connection.  Servers send a PING
   message at regular intervals if no other activity detected coming
   from a connection.  If a connection fails to respond to a PING
   message within a set amount of time, that connection is closed.  A
   PING message MAY be sent even if the connection is active.

   When a PING message is received, the appropriate PONG message MUST be
   sent as reply to <server1> (server which sent the PING message out)
   as soon as possible.  If the <server2> parameter is specified, it
   represents the target of the ping, and the message gets forwarded
   there.

   Numeric Replies:

           ERR_NOORIGIN                  ERR_NOSUCHSERVER

   Examples:

   PING tolsun.oulu.fi             ; Command to send a PING message to
                                   server

   PING WiZ tolsun.oulu.fi         ; Command from WiZ to send a PING
                                   message to server "tolsun.oulu.fi"

   PING :irc.funet.fi              ; Ping message sent by server
                                   "irc.funet.fi"

3.7.3 Pong message

      Command: PONG
   Parameters: <server> [ <server2> ]

   PONG message is a reply to ping message.  If parameter <server2> is
   given, this message MUST be forwarded to given target.  The <server>
   parameter is the name of the entity who has responded to PING message
   and generated this message.

   Numeric Replies:

           ERR_NOORIGIN                  ERR_NOSUCHSERVER

   Example:

   PONG csd.bu.edu tolsun.oulu.fi  ; PONG message from csd.bu.edu to
                                   tolsun.oulu.fi

3.7.4 Error

      Command: ERROR
   Parameters: <error message>

   The ERROR command is for use by servers when reporting a serious or
   fatal error to its peers.  It may also be sent from one server to
   another but MUST NOT be accepted from any normal unknown clients.

   Only an ERROR message SHOULD be used for reporting errors which occur
   with a server-to-server link.  An ERROR message is sent to the server
   at the other end (which reports it to appropriate local users and
   logs) and to appropriate local users and logs.  It is not to be
   passed onto any other servers by a server if it is received from a
   server.

   The ERROR message is also used before terminating a client
   connection.

   When a server sends a received ERROR message to its operators, the
   message SHOULD be encapsulated inside a NOTICE message, indicating
   that the client was not responsible for the error.

   Numerics:

           None.

   Examples:

   ERROR :Server *.fi already exists ; ERROR message to the other server
                                   which caused this error.

   NOTICE WiZ :ERROR from csd.bu.edu -- Server *.fi already exists
                                   ; Same ERROR message as above but
                                   sent to user WiZ on the other server.

4.1 Away

      Command: AWAY
   Parameters: [ <text> ]

   With the AWAY command, clients can set an automatic reply string for
   any PRIVMSG commands directed at them (not to a channel they are on).
   The server sends an automatic reply to the client sending the PRIVMSG
   command.  The only replying server is the one to which the sending
   client is connected to.

   The AWAY command is used either with one parameter, to set an AWAY
   message, or with no parameters, to remove the AWAY message.

   Because of its high cost (memory and bandwidth wise), the AWAY
   message SHOULD only be used for client-server communication.  A
   server MAY choose to silently ignore AWAY messages received from
   other servers.  To update the away status of a client across servers,
   the user mode 'a' SHOULD be used instead.  (See Section 3.1.5)

   Numeric Replies:

           RPL_UNAWAY                    RPL_NOWAWAY

   Example:

   AWAY :Gone to lunch.  Back in 5 ; Command to set away message to
                                   "Gone to lunch.  Back in 5".

4.2 Rehash message

      Command: REHASH
   Parameters: None

   The rehash command is an administrative command which can be used by
   an operator to force the server to re-read and process its
   configuration file.

   Numeric Replies:

           RPL_REHASHING                 ERR_NOPRIVILEGES


   Example:

   REHASH                          ; message from user with operator
                                   status to server asking it to reread
                                   its configuration file.

4.3 Die message

      Command: DIE
   Parameters: None

   An operator can use the DIE command to shutdown the server.  This
   message is optional since it may be viewed as a risk to allow
   arbitrary people to connect to a server as an operator and execute
   this command.

   The DIE command MUST always be fully processed by the server to which
   the sending client is connected and MUST NOT be passed onto other
   connected servers.

   Numeric Replies:

           ERR_NOPRIVILEGES

   Example:

   DIE                             ; no parameters required.

4.4 Restart message

      Command: RESTART
   Parameters: None

   An operator can use the restart command to force the server to
   restart itself.  This message is optional since it may be viewed as a
   risk to allow arbitrary people to connect to a server as an operator
   and execute this command, causing (at least) a disruption to service.

   The RESTART command MUST always be fully processed by the server to
   which the sending client is connected and MUST NOT be passed onto
   other connected servers.

   Numeric Replies:

           ERR_NOPRIVILEGES

   Example:

   RESTART                         ; no parameters required.

4.5 Summon message

      Command: SUMMON
   Parameters: <user> [ <target> [ <channel> ] ]

   The SUMMON command can be used to give users who are on a host
   running an IRC server a message asking them to please join IRC.  This
   message is only sent if the target server (a) has SUMMON enabled, (b)
   the user is logged in and (c) the server process can write to the
   user's tty (or similar).

   If no <server> parameter is given it tries to summon <user> from the
   server the client is connected to is assumed as the target.

   If summon is not enabled in a server, it MUST return the
   ERR_SUMMONDISABLED numeric.

   Numeric Replies:

           ERR_NORECIPIENT               ERR_FILEERROR
           ERR_NOLOGIN                   ERR_NOSUCHSERVER
           ERR_SUMMONDISABLED            RPL_SUMMONING

   Examples:

   SUMMON jto                      ; summon user jto on the server's
                                   host

   SUMMON jto tolsun.oulu.fi       ; summon user jto on the host which a
                                   server named "tolsun.oulu.fi" is
                                   running.

4.6 Users

      Command: USERS
   Parameters: [ <target> ]

   The USERS command returns a list of users logged into the server in a
   format similar to the UNIX commands who(1), rusers(1) and finger(1).
   If disabled, the correct numeric MUST be returned to indicate this.

   Because of the security implications of such a command, it SHOULD be
   disabled by default in server implementations.  Enabling it SHOULD
   require recompiling the server or some equivalent change rather than
   simply toggling an option and restarting the server.  The procedure
   to enable this command SHOULD also include suitable large comments.

   Numeric Replies:

           ERR_NOSUCHSERVER              ERR_FILEERROR
           RPL_USERSSTART                RPL_USERS
           RPL_NOUSERS                   RPL_ENDOFUSERS
           ERR_USERSDISABLED

   Disabled Reply:

           ERR_USERSDISABLED

   Example:

   USERS eff.org                   ; request a list of users logged in
                                   on server eff.org

4.7 Operwall message

      Command: WALLOPS
   Parameters: <Text to be sent>

   The WALLOPS command is used to send a message to all currently
   connected users who have set the 'w' user mode for themselves.  (See
   Section 3.1.5 "User modes").

   After implementing WALLOPS as a user command it was found that it was
   often and commonly abused as a means of sending a message to a lot of
   people.  Due to this, it is RECOMMENDED that the implementation of
   WALLOPS allows and recognizes only servers as the originators of
   WALLOPS.

   Numeric Replies:

           ERR_NEEDMOREPARAMS

   Example:

   :csd.bu.edu WALLOPS :Connect '*.uiuc.edu 6667' from Joshua ; WALLOPS
                                   message from csd.bu.edu announcing a
                                   CONNECT message it received from
                                   Joshua and acted upon.

4.8 Userhost message

      Command: USERHOST
   Parameters: <nickname> *( SPACE <nickname> )

   The USERHOST command takes a list of up to 5 nicknames, each
   separated by a space character and returns a list of information
   about each nickname that it found.  The returned list has each reply
   separated by a space.

   Numeric Replies:

           RPL_USERHOST                  ERR_NEEDMOREPARAMS

   Example:

   USERHOST Wiz Michael syrk       ; USERHOST request for information on
                                   nicks "Wiz", "Michael", and "syrk"

   :ircd.stealth.net 302 yournick :syrk=+syrk@millennium.stealth.net
                                   ; Reply for user syrk

4.9 Ison message

      Command: ISON
   Parameters: <nickname> *( SPACE <nickname> )

   The ISON command was implemented to provide a quick and efficient
   means to get a response about whether a given nickname was currently
   on IRC. ISON only takes one (1) type of parameter: a space-separated
   list of nicks.  For each nickname in the list that is present, the
   server adds that to its reply string.  Thus the reply string may
   return empty (none of the given nicks are present), an exact copy of
   the parameter string (all of them present) or any other subset of the
   set of nicks given in the parameter.  The only limit on the number of
   nicks that may be checked is that the combined length MUST NOT be too
   large as to cause the server to chop it off so it fits in 512
   characters.

   ISON is only processed by the server local to the client sending the
   command and thus not passed onto other servers for further
   processing.

   Numeric Replies:

           RPL_ISON                      ERR_NEEDMOREPARAMS

   Example:

   ISON phone trillian WiZ jarlek Avalon Angel Monstah syrk
                                   ; Sample ISON request for 7 nicks.