3.1.1 Password message Command: PASS Parameters: 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: 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: The USER command is used at the beginning of connection to specify the username, hostname and realname of a new user. The 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 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: A normal user uses the OPER command to obtain operator privileges. The combination of and 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: *( ( "+" / "-" ) *( "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: The SERVICE command to register a new service. Command parameters specify the service nickname, distribution, type and info of a new service. The 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 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: [ ] 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: 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 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 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: ( *( "," ) [ *( "," ) ] ) / "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: *( "," ) [ ] 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: *( ( "-" / "+" ) * * ) 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: [ ] The TOPIC command is used to change or view the topic of a channel. The topic for channel is returned if there is no given. If the parameter is present, the topic for that channel will be changed, if this action is allowed for the user requesting it. If the 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: [ *( "," ) [ ] ] 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 parameter specifies which channel(s) to return information about. There is no error reply for bad channel names. If no 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 parameter is specified, the request is forwarded to that server which will generate the reply. Wildcards are allowed in the 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: [ *( "," ) [ ] ] The list command is used to list channels and their topics. If the parameter is used, only the status of that channel is displayed. If the parameter is specified, the request is forwarded to that server which will generate the reply. Wildcards are allowed in the 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: The INVITE command is used to invite a user to a channel. The parameter is the nickname of the person to be invited to the target 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: *( "," ) *( "," ) [] The KICK command can be used to request the forced removal of a user from a channel. It causes the to PART from the 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: PRIVMSG is used to send private messages between users, as well as to send messages to channels. is usually the nickname of the recipient of the message, or a channel name. The parameter may also be a host mask (#) or server 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: 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: [ ] The MOTD command is used to get the "Message Of The Day" of the given server, or current server if is omitted. Wildcards are allowed in the parameter. Numeric Replies: RPL_MOTDSTART RPL_MOTD RPL_ENDOFMOTD ERR_NOMOTD 3.4.2 Lusers message Command: LUSERS Parameters: [ [ ] ] 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 is specified, then the reply will only concern the part of the network formed by the servers matching the mask. Finally, if the parameter is specified, the request is forwarded to that server which will generate the reply. Wildcards are allowed in the parameter. Numeric Replies: RPL_LUSERCLIENT RPL_LUSEROP RPL_LUSERUNKOWN RPL_LUSERCHANNELS RPL_LUSERME ERR_NOSUCHSERVER 3.4.3 Version message Command: VERSION Parameters: [ ] The VERSION command is used to query the version of the server program. An optional parameter is used to query the version of the server program which a client is not directly connected to. Wildcards are allowed in the 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: [ [ ] ] The stats command is used to query statistics of certain server. If 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 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: [ [ ] ] 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 is given in addition to , 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: [ ] The time command is used to query local time from the specified server. If the parameter is not given, the server receiving the command must reply to the query. Wildcards are allowed in the 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: [ ] 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 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: [ ] 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 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 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 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 is a nickname, then only a reply for that nickname is given. If the parameter is omitted, it is RECOMMENDED that the TRACE command is parsed as targeted to the processing server. Wildcards are allowed in the 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: [ ] The admin command is used to find information about the administrator of the given server, or current server if parameter is omitted. Each server MUST have the ability to forward ADMIN messages to other servers. Wildcards are allowed in the 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: [ ] 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 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: [ [ ] ] 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: 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: [ [ "o" ] ] The WHO command is used by a client to generate a query which returns a list of information which 'matches' the parameter given by the client. In the absence of the 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 of "0" or any wildcard which will end up matching every visible user. The passed to WHO is matched against users' host, server, real name and nickname if the channel cannot be found. If the "o" parameter is passed only operators are returned according to the 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: [ ] *( "," ) 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 , any information about that nick which you are allowed to see is presented. If the 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 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: *( "," ) [ [ ] ] 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 replies will be returned (or all of them if no parameter is given). If a non-positive number is passed as being , then a full search is done. Wildcards are allowed in the 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: 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: [ ] 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 (server which sent the PING message out) as soon as possible. If the 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: [ ] PONG message is a reply to ping message. If parameter is given, this message MUST be forwarded to given target. The 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: 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: [ ] 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: [ [ ] ] 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 parameter is given it tries to summon 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: [ ] 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: 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: *( SPACE ) 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: *( SPACE ) 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.