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NODE

Section: Linux System Managers Manual (8)
Updated: 26 April 1997
Index

NAME

node - Node front end for AX.25, NET/ROM, Rose and TCP

SYNOPSIS

node

DESCRIPTION

Nodeis a simple node front end, modelled after the node shells of TheNetand G8BPQ nodes.

COMMANDS

The following commands are supported for users ofnode:

?

Give short list of available commands.

Bye

Disconnect user from the node.

Connect <port> <call> [via <call1> ...] [d|s] For AX.25

Connect <call | alias> [d|s] For NET/ROM

Connect <call> <address> [<digi>] [d|s] For ROSE

Initiate an AX.25, NET/ROM or ROSE connection to a remote host.If only one argument is supplied then the connection is assumed to be aNET/ROM connection and the argument specifies the callsign of alias of aNET/ROM node. If more than one argument is supplied and the second parameteris composed of numeric characters only then the connection is assumed to bea ROSE connection. Any other combination is assumed to be an AX.25 connectionwith the first argument being the AX25 port to use for the connection.

For a ROSE connection the <address> part must be exactly six or ten digits.If only six digits are supplied, the DNIC (first four digits) default to thelocal DNIC. The local DNIC is assumed to be that of the first configuredRose port in /etc/ax25/rsports.

The user may optionally supply as the last argument a single characterwhich modifies the default behaviour on disconnection of the connection.If a single `s' is entered as the last argument, then when the remote hostdisconnects you will be returned to this node. If a single `d' is entered asthe last argument, you will be disconnected from this node too. The Defaultbehaviour (neither `s' nor `d' entered) is configured in the node configurationfile and depends on the sysop preference.

CAllbook <call>[@<server>]

Retrieve data about a callsign from an internet-accessiblecallbook server. The server name can usually be omitted, sincethe default server configured by the operator is usuallyvalid. The default setting can be overridden by specifyinga host name.

Escape [<escape string>]

Override the sysop configured default escape character setting. If the Escapecommand is given without an argument then the current escape character settingis returned to the user. The escape string may be specified using any of thewell known codings:

<char>to enter the escape character in its binary form.

^Cto enter the escape character as a control character value.

NNNto set the escape character to a Decimal value.

0xNNto set the escape character to a HexaDecimal value.

0NNNto set the escape character to an Octal value.

offto disable the escape character.

Finger [<username>][@<hostname>]

Retrieve information about users of a system. If the username is omitted, shows the users currently logged on thehost. If the hostname is omitted, defaults to the local host.

Help [<command>]

Give help for the specified command or this text if nocommand is specified. Commands can not be abbreviated.Use the "?" command to retrieve a list of available commands.

HOst <hostname> | <ip address>

Give the Domain Name Service host name information about <hostname> or<ip address>.

Info

Display the version information and the contents of the/etc/ax25/node.info file, which should describe any aspectsof your system that you would like to brag about.

Links [* | <call>]

Give a list of active AX.25 connections to and from the local host.With an optional argument * list also AX.25 sockets in state listening.A callsign as argument gives a list of all connections with <call> assource or destination address.

Mheard <portname>

Give a list of heard AX.25 stations on the specified port.

Nodes [* | <node>]

Show the NET/ROM node table of the local host. The nodes on thislist can be reached using the Connect command without knowing theactual network path used (assuming the network is OK).

The optional argument '*' toggles verbose mode, showing theObsolescence counter, relative path quality and the port andneighbour node used to reach each node. You can also specifya node callsign to get the verbose information for a single node.In that case a "which" field that tells what route the kernelwill use to reach the node is also shown.

Ports

Show the available AX.25 ports. Shown are the port name and a shortdescription for the port. The port name is used when using the Connectcommand to connect to an user or service not running NET/ROM (eg. notvisible in the Nodes list).

PIng <host> [<size>]

Check if a host can be reached trough the network by sendingan ICMP Echo Request packet to the host and waiting for it toreply. If a reply is received the round-trip-time (RTT)between the local and remote hosts is shown.

If an optional length is specified the data portion of thepacket is filled with length number of bytes.

Routes

Show the NET/ROM neighbour table of the local host (ie. the nodeswhich the local node directly talks with). These nodes are usedto reach the other nodes on the node table.

Status

Give some more or less useful information about the system.

Telnet <host> [<port>] [<string>] [d|s]

Initiate a telnet session to a remote host using TCP/IP.By default, the telnet command connects to the TCP port 23(allocated for telnet). You can specify another TCP port ora TCP port name.

If an optional third argument <string> is given, that string, followedby a CRLF is sent to the remote host right after the connection isestablished. This is mainly useful for command aliases.

If a single `s' is entered as the last parameter, then whenthe remote host disconnects you will be returned to this node.If a single `d' is entered as the last parameter, you willbe disconnected from this node too. Default behaviour (neither`s' nor `d' entered) depends on sysop configuration.

TAlk <user> <message>

Send a message to another user of the node. The userin question must be in idle state (ie. not connected/connectinganywhere or running a program).

If the user has an SSID other than zero, the SSID must bespecified. If multiple users are logged in with the samecallsign/SSID pair, those who are in idle state, get the message.

Users

Show a list of users currently connected to the local node,where the users are coming from, and what are they doing at themoment.

FILES

/etc/ax25/node.conf: LinuxNode configuration file.
/etc/ax25/node.perms: LinuxNode permissions file.
/etc/ax25/node.motd: LinuxNode message of the day file.
/etc/ax25/node.info: The response to the 'info' command. This file should be edited to reflect the local configuration.
/var/ax25/node/loggedin: Database of current users.
/var/ax25/mheard/mheard.dat: Information about AX.25 stations heard.
/usr/lib/ax25/node/help/*.hlp: The online help files.

AUTHOR

Tomi Manninen OH2BNS <tpmanninAATTcc.hut.fi>
Alan Cox GW4PTS <gw4ptsAATTgw4pts.ampr.org>

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