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Active users (RFC0866)

IP.com Disclosure Number: IPCOM000003914D
Original Publication Date: 1983-May-01
Included in the Prior Art Database: 2000-Sep-13
Document File: 1 page(s) / 2K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

J. Postel: AUTHOR

Abstract

This RFC specifies a standard for the ARPA Internet community. Hosts on the ARPA Internet that choose to implement an Active Users Protocol 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: 866 ISI

May 1983

Active Users

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

the ARPA Internet that choose to implement an Active Users Protocol are

expected to adopt and implement this standard.

A useful debugging and measurement tool is an active users service. An

active users service simply sends a list of the currently active users

on the host without regard to the input.

An active user is one logged in, such as listed in SYSTAT or WHO.

TCP Based Active Users Service

One active users service is defined as a connection based application

on TCP. A server listens for TCP connections on TCP port 11. Once a

connection is established a list of the currently active users is

sent out the connection (and any data received is thrown away). The

service closes the connection after sending the list.

UDP Based Active Users Service

Another active users service service is defined as a datagram based

application on UDP. A server listens for UDP datagrams on UDP port

11. When a datagram is received, an answering datagram is sent

containing a list of the currently active users (the data in the

received datagram is ignored).

If the list does not fit in one datagram then send a sequence of

datagrams but don't break the information for a user (a line) across

a datagram. The user side should wait for a timeout for all

datagrams to arrive. Note that they are not necessarily in order.

User List Syntax

There is no specific syntax for the user list. It is recommended

that it be limited to the ASCII printing characters, space, carriage

return, and line feed. Each user should be listed on a separate

line.