RFC779 - Telnet send-location option

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　　Network Working Group E. Killian
Request for Comments: 779 LLL
April 1981

TELNET SEND-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 <location> IAC SE

The sender specifies the user's location to the other side via a
SEND-LOCATION subnegotiation. <location> 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]

RFC779 April 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]

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