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Telnet Extended Options: List Option (RFC0861)

IP.com Disclosure Number: IPCOM000003909D
Original Publication Date: 1983-May-01
Included in the Prior Art Database: 2000-Sep-13
Document File: 2 page(s) / 3K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

J. Postel: AUTHOR [+2]

Abstract

This RFC specifies a standard for the ARPA Internet community. Hosts on the ARPA Internet are expected to adopt and implement this standard.

This text was extracted from a ASCII Text document.
This is the abbreviated version, containing approximately 100% of the total text.

Network Working Group J. Postel

Request for Comments: 861 J. Reynolds

ISI

Obsoletes: NIC 16239 May 1983

TELNET EXTENDED OPTIONS - LIST OPTION

This RFC specifies a standard for the ARPA Internet community. Hosts on

the ARPA Internet are expected to adopt and implement this standard.

1. Command Name and Code

EXTENDED-OPTIONS-LIST (EXOPL) 255

2. Command Meanings

IAC DO EXOPL

The sender of this command REQUESTS that the receiver of this

command begin negotiating, or confirms that the receiver of this

command is expected to begin negotiating, TELNET options which are

on the "Extended Options List".

IAC WILL EXOPL

The sender of this command requests permission to begin

negotiating, or confirms that it will begin negotiating, TELNET

options which are on the "Extended Options List".

IAC WON'T EXOPL

The sender of this command REFUSES to negotiate, or to continue

negotiating, options on the "Extended Options List".

IAC DON'T EXOPL

The sender of this command DEMANDS that the receiver conduct no

further negotiation of options on the "Extended Options List".

IAC SB EXOPL

The subcommand contains information required for the negotiation

of an option of the "Extended Options List". The format of the

subcommand is discussed in section 5 below.

3. Default

WON'T EXOPL, DON'T EXOPL

RFC 861 May 1983

Negotiation of options on the "Extended Options List" is not

permitted.

4. Motivation for the Option

Eventually, a 257th TELNET option will be needed. This option will

extend the option list for another 256 options in a manner which is

easy to implement. The option is proposed now, rather than later

(probably much later), in order to reserve the option number (255).

5. An Abstract Description of the Option

The EXOPL option has five subcommand codes: WILL, WON'T, DO, DON'T,

and SB. They have exactly the same meanings as the TELNET commands

with the same names, and are used in exactly the same way. For

consistency, these subcommand codes will have the same values as the

TELNET command codes (250-254). Thus, the format for negotiating a

specific option on the "Extended Options List" (once both parties

have agreed to use it) is:

IAC SB EXOPL DO/DON'T/WILL/WON'T/

Once both sides have agreed to use the specific option specified by

format to be used is:

IAC SB EXOPL SB