Telnet send-location option

　　Network Working Group E. Killian

　　Request for Comments: 779 LLL

　　April 1981

　　TELNETSEND-LOCATION Option

　　1. Command name and code.

　　SEND-LOCATION 23

　　2. Command meanings.

　　IAC WILL SEND-LOCATION

　　The sender REQUESTS or AGREES to use the SEND-LOCATION option to　send the user's location.

　　IAC WON'T SEND-LOCATION

　　The sender REFUSES to use the SEND-LOCATION option.

　　IAC DO SEND-LOCATION

　　The sender REQUESTS that, or AGREES to have, the other side use　SEND-LOCATION commands send the user's location.

　　IAC DON'T SEND-LOCATION

　　The sender DEMANDS the other side not use the SEND-LOCATION　option.

　　IAC SB SEND-LOCATION IAC SE

　　The sender specifies the user's location to the other side via a　SEND-LOCATION subnegotiation. is a sequence of ASCII　printable characters; it is terminated by the IAC SE.

　　3. Default.

　　WON'T SEND-LOCATION

　　DON'T SEND-LOCATION

　　Killian [page 1]

　　RFC779April 1981

　　TELNET SEND-LOCATION Option

　　4. Motivation for the option.

　　Many network sites now provide a listing of the users currently　logged in giving their names and locations (see the NAME/FINGER　protocol, RFC742). The location is useful for physically locating　the user if he or she is nearby, or for calling them (a nearby phone　number is often included). However, for users logged in via the　network, the location printed is often no more than the originating　site name. This TELNET option allows the user's TELNET program to　send the user's location to the server TELNET so that it can be　displayed in addition to the site name. This functionality is　already present in the SUPDUP protocol (RFC734).

　　5. Description of the option.

　　When the user TELNET program knows the user's location, it should　offer to transmit this information to the server TELNET by sending　IAC WILL SEND-LOCATION. If the server's system is able to make use　of this information (as can the ITS sites), then the server will　reply with IAC DO SEND-LOCATION. The user TELNET is then free to　send the location in a subnegotiation at any time.

　　Killian [page 2]