AX25D.CONF(5) Linux Programmer's Manual AX25D.CONF(5)
NAME
ax25d.conf - ax25d configuration file.
DESCRIPTION
Ax25d.conf controls the functioning of ax25d. Its purpose is to spec-
ify on which ports to listen on, which applications are available, and
to whom they are available to. The configuration file is common to both
AX.25, NET/ROM and Rose and their is similarity between the two parts
of the file.
The general layout for an entry for a given port is as follows:
interface control
callsign entry 1
.
.
callsign entry n
The interface control line determines which port and callsigns apply to
the following callsign entry lines, until the next interface control is
read. There are four different variants of the interface control line:
1. [AX.25 Port Name]
2. [Callsign VIA AX.25 Port Name]
3. <NET/ROM Port Name>
4. {Callsign VIA Rose Port Name}
Version 1 allows the following callsign entry lines to listen on the
AX.25 port specified by the AX.25 port name using the default callsign
of that AX.25 port.
Version 2 allows the following callsign entry lines to listen on the
AX.25 port specified by the AX.25 port name using the callsign speci-
fied instead of the default callsign of that AX.25 port. Specifying a
* for the AX.25 port name allows the following callsign entries to be
valid for all the operating AX.25 ports using the callsign specified.
VIA can be abbreviated to just V. If the callsign has an asterisk
appended to it then the system will be listening on the port with the
callsign, but as a pseudo-digipeater instead of being the normal desti-
nation callsign.
Version 3 allows the following callsign entry lines to listen on the
NET/ROM port specified by the NET/ROM port name using the default call-
sign of that NET/ROM port.
Version 4 allows the following callsign entry lines to listen on the
Rose port using the specified Rose port name using the callsign speci-
fied as the service access point (SAP). A * may be specified for a
callsign to allow matching to any incoming Call Requests with any SAP.
The callsign entry lines have a similar layout for both AX.25, NET/ROM
and Rose, the layout is:
peer window t1 t2 t3 idle n2 mode uid exec args...
All values must be entered for all entries even when they are not used
(ie window for NET/ROM, just enter a * instead), The meanings of each
of the fields is given below. All timings apart from the idle value are
given in seconds, the idle values is given in minutes.
peer This specifies the callsign of the remote end of the
connection that should have the following parameters
and executable set up for them. The syntax of the peer
argument is explained below.
window This sets the the value of the window size, if a value
of * is entered in this field then the default value
for the port is taken from the "parameters" entry (see
below) or lacking such an entry, the kernel default
value is used. This entry is used by AX.25 but not by
NET/ROM or Rose.
t1 This sets the the value of the T1 timer, if a value of
* is entered in this field then the default value for
the port is taken from the "parameters" entry (see
below) or lacking such an entry, the kernel default
value is used. This entry is used by both AX.25 and
NET/ROM but not by Rose.
t2 This sets the the value of the T2 timer, if a value of
* is entered in this field then the default value for
the port is taken from the "parameters" entry (see
below) or lacking such an entry, the kernel default
value is used. This entry is used by both AX.25 and
NET/ROM but not by Rose.
t3 This sets the the value of the T3 timer, if a value of
* is entered in this field then the default value for
the port is taken from the "parameters" entry (see
below) or lacking such an entry, the kernel default
value is used. This entry is used by AX.25 but not by
NET/ROM or Rose.
idle This sets the the value of the idle timer, if a value
of * is entered in this field then the default value
for the port is taken from the "parameters" entry (see
below) or lacking such an entry, the kernel default
value is used.
n2 This sets the the value of the N2 counter, if a value
of * is entered in this field then the default value
for the port is taken from the "parameters" entry (see
below) or lacking such an entry, the kernel default
value is used. This entry is used by both AX.25 and
NET/ROM but not by Rose.
mode This is a set of flags that control the various prop-
erties associated with the incoming connection. The
flags are single letters, may be in either upper or
lower case, and there may not be any spaces between
them. If no flags are to be specified either a 0, - or
a * must be entered instead. The valid mode flag let-
ters are:
D Do not allow connections that have passed via any
digi-peaters. AX.25 only.
L Do not allow this station to connect, they are
Locked out.
N Check that the NET/ROM neighbour is allowed, cur-
rently unused.
Q Do not make an entry into the log file for this
connection.
V Validate the callsign of the incoming connection,
currently unused.
uid This is the userid that the following command should
run under when executing.
exec This is the executable that should be executed when an
incoming connection matches the criteria of both the
interface control and the callsign entry .
args... These are the optional arguments that are passed to
the executable. All of the arguments are passed liter-
ally apart from the following:
%d The name of the port that the connection is on.
%U The username (callsign) of the remote station in
upper case without the SSID.
%u The username (callsign) of the remote station in
lower case without the SSID.
%S The username (callsign) of the remote station in
upper case with the SSID.
%s The username (callsign) of the remote station in
lower case with the SSID.
%P The nodename of the remote station in upper case
without the SSID. This is only valid under
NET/ROM and Rose, under AX.25 a % is substituted
instead.
%p The nodename of the remote station in lower case
without the SSID. This is only valid under
NET/ROM and Rose, under AX.25 a % is substituted
instead.
%R The nodename of the remote station in upper case
with the SSID. This is only valid under NET/ROM
and Rose, under AX.25 a % is substituted instead.
%r The nodename of the remote station in lower case
with the SSID. This is only valid under NET/ROM
and Rose, under AX.25 a % is substituted instead.
%% A %.
The peer argument is dependant upon whether AX.25, NET/ROM or Rose is
being used. There are five formats of this argument:
1. default
2. parameters
3. callsign
4. callsign@node
5. @node
The first version is used by AX.25, NET/ROM and Rose to specify that
all callsigns on a given port are to be matched. The default line is
usually the last of the callsign entry lines, so that more specific
entries may have the chance to be matched first.
The second version is not a callsign entry that is used by any incoming
connections. It is a means to specify default values for parameters
such as Window, T1, T2, T3, Idle and N2. It is used for both AX.25,
NET/ROM and Rose.
The third version is used by both AX.25, NET/ROM and Rose to specify
the callsign of the remote station to match the callsign entry line. If
no SSID is specified then the callsign will be matched with any that
has the same callsign and any SSID. Specifying an SSID causes the call-
sign to be matched exactly. In the case of NET/ROM and Rose this entry
does not specify which node the originating callsign comes from.
The fourth version is used by NET/ROM and Rose to specify the callsign
of the remote station and the remote node to match the callsign entry
line. If no SSID is specified in the callsign section then the callsign
will be matched with any that has the same callsign and any SSID. Spec-
ifying an SSID causes the callsign to be matched exactly.
The fifth version is used by NET/ROM and Rose to specify only the
address of the remote node to match the callsign entry line. This entry
will mean that all remote users at the given node will match the entry.
Comments may be embedded in the configuration file by placing a # in
the first column.
FILES
/etc/ax25/ax25d.conf
SEE ALSO
ax25(4), netrom(4), rose(4), axports(5), nrports(5), rsports(5),
ax25d(8).
Linux 17 January 1997 AX25D.CONF(5)
