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Telnet Environment Option (RFC1408)

IP.com Disclosure Number: IPCOM000002233D
Original Publication Date: 1993-Jan-01
Included in the Prior Art Database: 2000-Sep-12
Document File: 6 page(s) / 13K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

D. Borman: AUTHOR [+2]

Abstract

This document specifies a mechanism for passing environment information between a telnet client and server. Use of this mechanism enables a telnet user to propagate configuration information to a remote host when connecting.

This text was extracted from a ASCII Text document.
This is the abbreviated version, containing approximately 23% of the total text.

Network Working Group D. Borman, Editor

Request for Comments: 1408 Cray Research, Inc.

January 1993

Telnet Environment Option

Status of this Memo

This RFC specifies an IAB standards track protocol for the Internet

community, and requests discussion and suggestions for improvements.

Please refer to the current edition of the "IAB Official Protocol

Standards" for the standardization state and status of this protocol.

Distribution of this memo is unlimited.

Abstract

This document specifies a mechanism for passing environment

information between a telnet client and server. Use of this

mechanism enables a telnet user to propagate configuration

information to a remote host when connecting.

1. Command Names and Codes

ENVIRON 36

IS 0

SEND 1

INFO 2

VAR 0

VALUE 1

ESC 2

USERVAR 3

2. Command Meanings

IAC WILL ENVIRON

The sender of this command is willing to send environment

variables.

IAC WONT ENVIRON

The sender of this command refuses to send environment variables.

IAC DO ENVIRON

The sender of this command is willing to receive environment

variables.

IAC DONT ENVIRON

The sender of this command refuses to accept environment

variables.

IAC SB ENVIRON SEND [ type ... [ type ... [ ... ] ] ] IAC SE

The sender of this command requests that the remote side send its

environment variables. The "type" may be either VAR or USERVAR,

to indicate either well known or user variable names. Only the

side that is DO ENVIRON may initiate a SEND command. If a list of

variables is specified, then only those variables should be sent.

If no list is specified, then the default environment, of both

well known and user defined variables, should be sent. If one of

the variables has no name, then all the variables of that type

(well known or user defined) in the default environment should be

sent.

IAC SB ENVIRON IS type ... [ VALUE ... ] [ type ... [ VALUE ... ] [

The sender of this command is sending environment variables. This

command is sent in response to a SEND request. Only the side that

is WILL ENVIRON may send an IS command. The "type"/VALUE pairs

must be returned in the same order as the SEND request specified

them, and there must be a response for each "type ..." explicitly

requested. The "type" will be VAR or USERVAR. Multiple

environment variables may be sent. The characters following a

"type" up to the next "type" or VALUE specify the variable name.

The characters following a VALUE up to the next "type" specify the

value of the variable. If a "type" is not followed by a VALUE

(e.g., by another VAR, USERV...