/* -*- Mode: Text -*- */

autogen definitions options;

#include copyright.def
#include homerc.def
#include autogen-version.def

prog-name      = "ntpq";
prog-title     = "standard NTP query program";
argument       = '[ host ...]';

flag = {
    name      = ipv4;
    flags-cant = ipv6;
    value     = 4;
    descrip   = "Force IPv4 name resolution";
    doc = <<-  _EndOfDoc_
	Force resolution of following host names on the command line
	to the IPv4 namespace.
	_EndOfDoc_;
};

flag = {
    name      = ipv6;
    flags-cant = ipv4;
    value     = 6;
    descrip   = "Force IPv6 name resolution";
    doc = <<-  _EndOfDoc_
	Force resolution of following host names on the command line
	to the IPv6 namespace.
	_EndOfDoc_;
};

flag = {
    name      = command;
    value     = c;
    arg-type  = string;
    descrip   = "run a command and exit";
    max       = NOLIMIT;
    arg-name  = cmd;
    call-proc = ntpq_custom_opt_handler;
    doc = <<-  _EndOfDoc_
	The following argument is interpreted as an interactive format command
	and is added to the list of commands to be executed on the specified
	host(s).
	_EndOfDoc_;
};

#include debug-opt.def

flag = {
    name      = interactive;
    value     = i;
    flags-cant = command, peers;
    descrip   = "Force ntpq to operate in interactive mode";
    doc = <<-  _EndOfDoc_
	Force @code{ntpq} to operate in interactive mode.
	Prompts will be written to the standard output and
	commands read from the standard input.
	_EndOfDoc_;
};

flag = {
    name      = numeric;
    value     = n;
    descrip   = "numeric host addresses";
    doc = <<-  _EndOfDoc_
	Output all host addresses in dotted-quad numeric format rather than
	converting to the canonical host names.
	_EndOfDoc_;
};

flag = {
    name      = old-rv;
    descrip   = "Always output status line with readvar";
    doc = <<-  _EndOfDoc_
	By default, @code{ntpq} now suppresses the @code{associd=...}
	line that precedes the output of @code{readvar}
	(alias @code{rv}) when a single variable is requested, such as
	@code{ntpq -c "rv 0 offset"}.
	This option causes @code{ntpq} to include both lines of output
	for a single-variable @code{readvar}.
	Using an environment variable to
	preset this option in a script will enable both older and
	newer @code{ntpq} to behave identically in this regard.
	_EndOfDoc_;
};

flag = {
    name      = peers;
    value     = p;
    descrip   = "Print a list of the peers";
    flags-cant = interactive;
    call-proc = ntpq_custom_opt_handler;
    doc = <<-  _EndOfDoc_
	Print a list of the peers known to the server as well as a summary
	of their state. This is equivalent to the 'peers' interactive command.
	_EndOfDoc_;
};

flag = {
    name      = refid;
    value     = r;
    descrip   = "Set default display type for S2+ refids";
    arg-type  = keyword;
    keyword   = hash, ipv4;
    arg-default = ipv4;
    doc = <<-  _EndOfDoc_
	Set the default display format for S2+ refids.
	_EndOfDoc_;
};

flag = {
    name      = unconnected;
    value     = u;
    descrip   = "Use unconnected UDP to communicate with ntpd (default on Windows)";
    doc = <<-  _EndOfDoc_
	Open an unconnected UDP association to ntpd (the default
	on Windows).
	_EndOfDoc_;
};

flag = {
    name      = wide;
    value     = w;
    descrip   = "Display the full 'remote' value";
    doc = <<-  _EndOfDoc_
	Display the full value of the 'remote' value.  If this requires
	more than 15 characters, display the full value, emit a newline,
	and continue the data display properly indented on the next line.
	_EndOfDoc_;
};

doc-section	= {
  ds-type	= 'DESCRIPTION';
  ds-format	= 'mdoc';
  ds-text	= <<-  _END_PROG_MDOC_DESCRIP
.Pp
The
.Nm
utility program is used to query NTP servers to monitor NTP operations
and performance, requesting
information about current state and/or changes in that state.
The program may be run either in interactive mode or controlled using
command line arguments.
Requests to read and write arbitrary
variables can be assembled, with raw and pretty-printed output
options being available.
The
.Nm
utility can also obtain and print a
list of peers in a common format by sending multiple queries to the
server.
.Pp
If one or more request options is included on the command line
when
.Nm
is executed, each of the requests will be sent
to the NTP servers running on each of the hosts given as command
line arguments, or on localhost by default.
If no request options
are given,
.Nm
will attempt to read commands from the
standard input and execute these on the NTP server running on the
first host given on the command line, again defaulting to localhost
when no other host is specified.
The
.Nm
utility will prompt for
commands if the standard input is a terminal device.
.Pp
.Nm
uses NTP mode 6 packets to communicate with the
NTP server, and hence can be used to query any compatible server on
the network which permits it.
Note that since NTP is a UDP protocol
this communication will be somewhat unreliable, especially over
large distances in terms of network topology.
The
.Nm
utility makes
one attempt to retransmit requests, and will time requests out if
the remote host is not heard from within a suitable timeout
time.
.Pp
Note that in contexts where a host name is expected, a
.Fl 4
qualifier preceding the host name forces resolution to the IPv4
namespace, while a
.Fl 6
qualifier forces resolution to the IPv6 namespace.
For examples and usage, see the
.Dq NTP Debugging Techniques
page.
.Pp
Specifying a
command line option other than
.Fl i
or
.Fl n
will
cause the specified query (queries) to be sent to the indicated
host(s) immediately.
Otherwise,
.Nm
will attempt to read
interactive format commands from the standard input.

.Ss "Internal Commands"
.Pp
Interactive format commands consist of a keyword followed by zero
to four arguments.
Only enough characters of the full keyword to
uniquely identify the command need be typed.
.Pp
A
number of interactive format commands are executed entirely within
the
.Nm
utility itself and do not result in NTP
requests being sent to a server.
These are described following.
.Bl -tag -width "help [command]" -compact -offset indent
.It Ic ? Op Ar command
.It Ic help Op Ar command
A
.Ql \&?
by itself will print a list of all the commands
known to
.Nm .
A
.Ql \&?
followed by a command name will print function and usage
information about the command.
.It Ic addvars Ar name Ns Oo \&= Ns Ar value Oc Ns Op ,...
.It Ic rmvars Ar name Ns Op ,...
.It Ic clearvars
.It Ic showvars
The arguments to this command consist of a list of
items of the form
.Ar name Ns Op \&= Ns Ar value ,
where the
.No \&= Ns Ar value
is ignored, and can be omitted,
in requests to the server to read variables.
The
.Nm
utility maintains an internal list in which data to be included in
messages can be assembled, and displayed or set using the
.Ic readlist
and
.Ic writelist
commands described below.
The
.Ic addvars
command allows variables and their optional values to be added to
the list.
If more than one variable is to be added, the list should
be comma-separated and not contain white space.
The
.Ic rmvars
command can be used to remove individual variables from the list,
while the
.Ic clearvars
command removes all variables from the
list.
The
.Ic showvars
command displays the current list of optional variables.
.It Ic authenticate Op Cm yes Ns | Ns Cm no
Normally
.Nm
does not authenticate requests unless
they are write requests.
The command
.Ic authenticate Cm yes
causes
.Nm
to send authentication with all requests it
makes.
Authenticated requests causes some servers to handle
requests slightly differently.
The command
.Ic authenticate
causes
.Nm
to display whether or not
it is currently authenticating requests.
.It Ic cooked
Causes output from query commands to be "cooked", so that
variables which are recognized by
.Nm
will have their
values reformatted for human consumption.
Variables which
.Nm
could not decode completely are
marked with a trailing
.Ql \&? .
.It Ic debug Op Cm more Ns | Ns Cm less Ns | Ns Cm off
With no argument, displays the current debug level.
Otherwise, the debugging level is changed as indicated.
.It Ic delay Op Ar milliseconds
Specify a time interval to be added to timestamps included in
requests which require authentication.
This is used to enable
(unreliable) server reconfiguration over long delay network paths
or between machines whose clocks are unsynchronized.
Actually the
server does not now require timestamps in authenticated requests,
so this command may be obsolete.
Without any arguments, displays the current delay.
.It Ic drefid Op Cm hash Ns | Ns Cm ipv4
Display refids as IPv4 or hash.
Without any arguments, displays whether refids are shown as IPv4
addresses or hashes.
.It Ic exit
Exit
.Nm .
.It Ic host Op Ar name
Set the host to which future queries will be sent.
The
.Ar name
may be either a host name or a numeric address.
Without any arguments, displays the current host.
.It Ic hostnames Op Cm yes Ns | Ns Cm no
If
.Cm yes
is specified, host names are printed in
information displays.
If
.Cm no
is specified, numeric
addresses are printed instead.
The default is
.Cm yes ,
unless
modified using the command line
.Fl n
switch.
Without any arguments, displays whether host names or numeric addresses
are shown.
.It Ic keyid Op Ar keyid
This command allows the specification of a key number to be
used to authenticate configuration requests.
This must correspond
to the
.Cm controlkey
key number the server has been configured to use for this
purpose.
Without any arguments, displays the current
.Ar keyid .
.It Ic keytype Op Ar digest
Specify the digest algorithm to use for authenticating requests, with default
.Cm MD5 .
If
.Nm
was built with OpenSSL support, and OpenSSL is installed,
.Ar digest
can be any message digest algorithm supported by OpenSSL.
If no argument is given, the current
.Ic keytype Ar digest
algorithm used is displayed.
.It Ic ntpversion Op Cm 1 Ns | Ns Cm 2 Ns | Ns Cm 3 Ns | Ns Cm 4
Sets the NTP version number which
.Nm
claims in
packets.
Defaults to 3, and note that mode 6 control messages (and
modes, for that matter) didn't exist in NTP version 1.
There appear
to be no servers left which demand version 1.
With no argument, displays the current NTP version that will be used
when communicating with servers.
.It Ic passwd
This command prompts you to type in a password (which will not
be echoed) which will be used to authenticate configuration
requests.
The password must correspond to the key configured for
use by the NTP server for this purpose if such requests are to be
successful.
.It Ic poll Oo Ar n Oc Op Cm verbose
Poll an NTP server in client mode
.Ar n
times.
Poll not implemented yet.
.It Ic quit
Exit
.Nm .
.It Ic raw
Causes all output from query commands is printed as received
from the remote server.
The only formating/interpretation done on
the data is to transform nonascii data into a printable (but barely
understandable) form.
.It Ic timeout Op Ar milliseconds
Specify a timeout period for responses to server queries.
The
default is about 5000 milliseconds.
Without any arguments, displays the current timeout period.
Note that since
.Nm
retries each query once after a timeout, the total waiting time for
a timeout will be twice the timeout value set.
.It Ic version
Display the version of the
.Nm
program.
.El

.Ss "Control Message Commands"
Association ids are used to identify system, peer and clock variables.
System variables are assigned an association id of zero and system name
space, while each association is assigned a nonzero association id and
peer namespace.
Most control commands send a single message to the server and expect a
single response message.
The exceptions are the
.Ic peers
command, which sends a series of messages,
and the
.Ic mreadlist
and
.Ic mreadvar
commands, which iterate over a range of associations.
.Bl -tag -width "something" -compact -offset indent
.It Ic apeers
Display a list of peers in the form:
.Dl [tally]remote refid assid st t when pool reach delay offset jitter
where the output is just like the
.Ic peers
command except that the
.Cm refid
is displayed in hex format and the association number is also displayed.
.It Ic associations
Display a list of mobilized associations in the form:
.Dl ind assid status conf reach auth condition last_event cnt
.Bl -column -offset indent ".Sy Variable" "see the select field of the peer status word"
.It Sy Variable Ta Sy Description
.It Cm ind Ta index on this list
.It Cm assid Ta association id
.It Cm status Ta peer status word
.It Cm conf Ta Cm yes : No persistent, Cm no : No ephemeral
.It Cm reach Ta Cm yes : No reachable, Cm no : No unreachable
.It Cm auth Ta Cm ok , Cm yes , Cm bad No and Cm none
.It Cm condition Ta selection status \&(see the Cm select No field of the peer status word\&)
.It Cm last_event Ta event report \&(see the Cm event No field of the peer status word\&)
.It Cm cnt Ta event count \&(see the Cm count No field of the peer status word\&)
.El
.It Ic authinfo
Display the authentication statistics counters:
time since reset, stored keys, free keys, key lookups, keys not found,
uncached keys, expired keys, encryptions, decryptions.
.It Ic clocklist Op Ar associd
.It Ic cl Op Ar associd
Display all clock variables in the variable list for those associations
supporting a reference clock.
.It Ic clockvar Oo Ar associd Oc Oo Ar name Ns Oo \&= Ns Ar value Oc Ns Oc Ns Op ,...
.It Ic cv Oo Ar associd Oc Oo Ar name Ns Oo \&= Ns Ar value Oc Ns Oc Ns Op ,...
Display a list of clock variables for those associations supporting a
reference clock.
.It Ic :config Ar "configuration command line"
Send the remainder of the command line, including whitespace, to the
server as a run-time configuration command in the same format as a line
in the configuration file.
This command is experimental until further notice and clarification.
Authentication is of course required.
.It Ic config-from-file Ar filename
Send each line of
.Ar filename
to the server as run-time configuration commands in the same format as
lines in the configuration file.
This command is experimental until further notice and clarification.
Authentication is required.
.It Ic ifstats
Display status and statistics counters for each local network interface address:
interface number, interface name and address or broadcast, drop, flag,
ttl, mc, received, sent, send failed, peers, uptime.
Authentication is required.
.It Ic iostats
Display network and reference clock I/O statistics:
time since reset, receive buffers, free receive buffers, used receive buffers,
low water refills, dropped packets, ignored packets, received packets,
packets sent, packet send failures, input wakeups, useful input wakeups.
.It Ic kerninfo
Display kernel loop and PPS statistics:
associd, status, pll offset, pll frequency, maximum error,
estimated error, kernel status, pll time constant, precision,
frequency tolerance, pps frequency, pps stability, pps jitter,
calibration interval, calibration cycles, jitter exceeded,
stability exceeded, calibration errors.
As with other ntpq output, times are in milliseconds; very small values
may be shown as exponentials.
The precision value displayed is in milliseconds as well, unlike the
precision system variable.
.It Ic lassociations
Perform the same function as the associations command, except display
mobilized and unmobilized associations, including all clients.
.It Ic lopeers Op Fl 4 Ns | Ns Fl 6
Display a list of all peers and clients showing
.Cm dstadr
(associated with the given IP version).
.It Ic lpassociations
Display the last obtained list of associations, including all clients.
.It Ic lpeers Op Fl 4 Ns | Ns Fl 6
Display a list of all peers and clients (associated with the given IP version).
.It Ic monstats
Display monitor facility status, statistics, and limits:
enabled, addresses, peak addresses, maximum addresses,
reclaim above count, reclaim older than, kilobytes, maximum kilobytes.
.It Ic mreadlist Ar associdlo Ar associdhi
.It Ic mrl Ar associdlo Ar associdhi
Perform the same function as the
.Ic readlist
command for a range of association ids.
.It Ic mreadvar Ar associdlo Ar associdhi Oo Ar name Oc Ns Op ,...
This range may be determined from the list displayed by any
command showing associations.
.It Ic mrv Ar associdlo Ar associdhi Oo Ar name Oc Ns Op ,...
Perform the same function as the
.Ic readvar
command for a range of association ids.
This range may be determined from the list displayed by any
command showing associations.
.It Xo Ic mrulist Oo Cm limited | Cm kod | Cm mincount Ns \&= Ns Ar count |
.Cm laddr Ns \&= Ns Ar localaddr | Cm sort Ns \&= Ns Oo \&- Oc Ns Ar sortorder |
.Cm resany Ns \&= Ns Ar hexmask | Cm resall Ns \&= Ns Ar hexmask Oc
.Xc
Display traffic counts of the most recently seen source addresses
collected and maintained by the monitor facility.
With the exception of
.Cm sort Ns \&= Ns Oo \&- Oc Ns Ar sortorder ,
the options filter the list returned by
.Xr ntpd 8 .
The
.Cm limited
and
.Cm kod
options return only entries representing client addresses from which the
last packet received triggered either discarding or a KoD response.
The
.Cm mincount Ns = Ns Ar count
option filters entries representing less than
.Ar count
packets.
The
.Cm laddr Ns = Ns Ar localaddr
option filters entries for packets received on any local address other than
.Ar localaddr .
.Cm resany Ns = Ns Ar hexmask
and
.Cm resall Ns = Ns Ar hexmask
filter entries containing none or less than all, respectively, of the bits in
.Ar hexmask ,
which must begin with
.Cm 0x .
The
.Ar sortorder
defaults to
.Cm lstint
and may be 
.Cm addr ,
.Cm avgint ,
.Cm count ,
.Cm lstint ,
or any of those preceded by
.Ql \&-
to reverse the sort order.
The output columns are:
.Bl -tag -width "something" -compact -offset indent
.It Column
Description
.It Ic lstint
Interval in seconds between the receipt of the most recent packet from
this address and the completion of the retrieval of the MRU list by
.Nm .
.It Ic avgint
Average interval in s between packets from this address.
.It Ic rstr
Restriction flags associated with this address.
Most are copied unchanged from the matching
.Ic restrict
command, however 0x400 (kod) and 0x20 (limited) flags are cleared unless
the last packet from this address triggered a rate control response.
.It Ic r
Rate control indicator, either
a period,
.Ic L
or
.Ic K
for no rate control response,
rate limiting by discarding, or rate limiting with a KoD response, respectively.
.It Ic m
Packet mode.
.It Ic v
Packet version number.
.It Ic count
Packets received from this address.
.It Ic rport
Source port of last packet from this address.
.It Ic remote address
host or DNS name, numeric address, or address followed by
claimed DNS name which could not be verified in parentheses.
.El
.It Ic opeers Op Fl 4 | Fl 6
Obtain and print the old-style list of all peers and clients showing
.Cm dstadr
(associated with the given IP version),
rather than the
.Cm refid .
.It Ic passociations
Perform the same function as the
.Ic associations
command,
except that it uses previously stored data rather than making a new query.
.It Ic peers
Display a list of peers in the form:
.Dl [tally]remote refid st t when pool reach delay offset jitter
.Bl -tag -width "something" -compact -offset indent
.It Variable
Description
.It Cm [tally]
single-character code indicating current value of the
.Ic select
field of the
.Lk decode.html#peer "peer status word"
.It Cm remote
host name (or IP number) of peer.
The value displayed will be truncated to 15 characters unless the
.Nm
.Fl w
option is given, in which case the full value will be displayed
on the first line, and if too long,
the remaining data will be displayed on the next line.
.It Cm refid
source IP address or
.Lk decode.html#kiss "'kiss code"
.It Cm st
stratum: 0 for local reference clocks, 1 for servers with local
reference clocks, ..., 16 for unsynchronized server clocks
.It Cm t
.Ic u :
unicast or manycast client,
.Ic b :
broadcast or multicast client,
.Ic p :
pool source,
.Ic l :
local (reference clock),
.Ic s :
symmetric (peer),
.Ic A :
manycast server,
.Ic B :
broadcast server,
.Ic M :
multicast server
.It Cm when
time in seconds, minutes, hours, or days since the last packet
was received, or
.Ql \&-
if a packet has never been received
.It Cm poll
poll interval (s)
.It Cm reach
reach shift register (octal)
.It Cm delay
roundtrip delay
.It Cm offset
offset of server relative to this host
.It Cm jitter
offset RMS error estimate.
.El
.It Ic pstats Ar associd
Display the statistics for the peer with the given
.Ar associd :
associd, status, remote host, local address, time last received,
time until next send, reachability change, packets sent,
packets received, bad authentication, bogus origin, duplicate,
bad dispersion, bad reference time, candidate order.
.It Ic readlist Op Ar associd
.It Ic rl Op Ar associd
Display all system or peer variables.
If the
.Ar associd
is omitted, it is assumed to be zero.
.It Ic readvar Op Ar associd Ar name Ns Oo Ns = Ns Ar value Oc Op , ...
.It Ic rv Op Ar associd Ar name Ns Oo Ns = Ns Ar value Oc Op , ...
Display the specified system or peer variables.
If
.Ar associd
is zero, the variables are from the
.Sx System Variables
name space, otherwise they are from the
.Sx Peer Variables
name space.
The
.Ar associd
is required, as the same name can occur in both spaces.
If no
.Ar name
is included, all operative variables in the name space are displayed.
In this case only, if the
.Ar associd
is omitted, it is assumed to be zero.
Multiple names are specified with comma separators and without whitespace.
Note that time values are represented in milliseconds
and frequency values in parts-per-million (PPM).
Some NTP timestamps are represented in the format
.Ar YYYY Ns Ar MM Ar DD Ar TTTT ,
where
.Ar YYYY
is the year,
.Ar MM
the month of year,
.Ar DD
the day of month and
.Ar TTTT
the time of day.
.It Ic reslist
Display the access control (restrict) list for
.Nm .
Authentication is required.
.It Ic saveconfig Ar filename
Save the current configuration,
including any runtime modifications made by
.Ic :config
or
.Ic config-from-file ,
to the NTP server host file
.Ar filename .
This command will be rejected by the server unless
.Lk miscopt.html#saveconfigdir "saveconfigdir"
appears in the
.Xr ntpd 8
configuration file.
.Ar filename
can use
.Xr date 1
format specifiers to substitute the current date and time, for
example,
.D1 Ic saveconfig Pa ntp-%Y%m%d-%H%M%S.conf .
The filename used is stored in system variable
.Cm savedconfig .
Authentication is required.
.It Ic sysinfo
Display system operational summary:
associd, status, system peer, system peer mode, leap indicator,
stratum, log2 precision, root delay, root dispersion,
reference id, reference time, system jitter, clock jitter,
clock wander, broadcast delay, symm. auth. delay.
.It Ic sysstats
Display system uptime and packet counts maintained in the
protocol module:
uptime, sysstats reset, packets received, current version,
older version, bad length or format, authentication failed,
declined, restricted, rate limited, KoD responses,
processed for time.
.It Ic timerstats
Display interval timer counters:
time since reset, timer overruns, calls to transmit.
.It Ic writelist Ar associd
Set all system or peer variables included in the variable list.
.It Ic writevar Ar associd Ar name Ns = Ns Ar value Op , ...
Set the specified variables in the variable list.
If the
.Ar associd
is zero, the variables are from the
.Sx System Variables
name space, otherwise they are from the
.Sx Peer Variables
name space.
The
.Ar associd
is required, as the same name can occur in both spaces.
Authentication is required.
.El

.Ss Status Words and Kiss Codes
The current state of the operating program is shown
in a set of status words
maintained by the system.
Status information is also available on a per-association basis.
These words are displayed by the
.Ic readlist
and
.Ic associations
commands both in hexadecimal and in decoded short tip strings.
The codes, tips and short explanations are documented on the
.Lk decode.html "Event Messages and Status Words"
page.
The page also includes a list of system and peer messages,
the code for the latest of which is included in the status word.
.Pp
Information resulting from protocol machine state transitions
is displayed using an informal set of ASCII strings called
.Lk decode.html#kiss "kiss codes" .
The original purpose was for kiss-o'-death (KoD) packets
sent by the server to advise the client of an unusual condition.
They are now displayed, when appropriate,
in the reference identifier field in various billboards.

.Ss System Variables
The following system variables appear in the
.Ic readlist
billboard.
Not all variables are displayed in some configurations.
.Pp
.Bl -tag -width "something" -compact -offset indent
.It Variable
Description
.It Cm status
.Lk decode.html#sys "system status word"
.It Cm version
NTP software version and build time
.It Cm processor
hardware platform and version
.It Cm system
operating system and version
.It Cm leap
leap warning indicator (0-3)
.It Cm stratum
stratum (1-15)
.It Cm precision
precision (log2 s)
.It Cm rootdelay
total roundtrip delay to the primary reference clock
.It Cm rootdisp
total dispersion to the primary reference clock
.It Cm refid
reference id or
.Lk decode.html#kiss "kiss code"
.It Cm reftime
reference time
.It Ic clock
date and time of day
.It Cm peer
system peer association id
.It Cm tc
time constant and poll exponent (log2 s) (3-17)
.It Cm mintc
minimum time constant (log2 s) (3-10)
.It Cm offset
combined offset of server relative to this host
.It Cm frequency
frequency drift (PPM) relative to hardware clock
.It Cm sys_jitter
combined system jitter
.It Cm clk_wander
clock frequency wander (PPM)
.It Cm clk_jitter
clock jitter
.It Cm tai
TAI-UTC offset (s)
.It Cm leapsec
NTP seconds when the next leap second is/was inserted
.It Cm expire
NTP seconds when the NIST leapseconds file expires
.El
The jitter and wander statistics are exponentially-weighted RMS averages.
The system jitter is defined in the NTPv4 specification;
the clock jitter statistic is computed by the clock discipline module.
.Pp
When the NTPv4 daemon is compiled with the OpenSSL software library,
additional system variables are displayed,
including some or all of the following,
depending on the particular Autokey dance:
.Bl -tag -width "something" -compact -offset indent
.It Variable
Description
.It Cm host
Autokey host name for this host
.It Cm ident
Autokey group name for this host
.It Cm flags
host flags  (see Autokey specification)
.It Cm digest
OpenSSL message digest algorithm
.It Cm signature
OpenSSL digest/signature scheme
.It Cm update
NTP seconds at last signature update
.It Cm cert
certificate subject, issuer and certificate flags
.It Cm until
NTP seconds when the certificate expires
.El
.Ss Peer Variables
The following peer variables appear in the
.Ic readlist
billboard for each association.
Not all variables are displayed in some configurations.
.Pp
.Bl -tag -width "something" -compact -offset indent
.It Variable
Description
.It Cm associd
association id
.It Cm status
.Lk decode.html#peer "peer status word"
.It Cm srcadr
source (remote) IP address
.It Cm srcport
source (remote) port
.It Cm dstadr
destination (local) IP address
.It Cm dstport
destination (local) port
.It Cm leap
leap indicator (0-3)
.It Cm stratum
stratum (0-15)
.It Cm precision
precision (log2 s)
.It Cm rootdelay
total roundtrip delay to the primary reference clock
.It Cm rootdisp
total root dispersion to the primary reference clock
.It Cm refid
reference id or
.Lk decode.html#kiss "kiss code"
.It Cm reftime
reference time
.It Cm rec
last packet received time
.It Cm reach
reach register (octal)
.It Cm unreach
unreach counter
.It Cm hmode
host mode (1-6)
.It Cm pmode
peer mode (1-5)
.It Cm hpoll
host poll exponent (log2 s) (3-17)
.It Cm ppoll
peer poll exponent (log2 s) (3-17)
.It Cm headway
headway (see
.Lk rate.html "Rate Management and the Kiss-o'-Death Packet" )
.It Cm flash
.Lk decode.html#flash "flash status word"
.It Cm keyid
symmetric key id
.It Cm offset
filter offset
.It Cm delay
filter delay
.It Cm dispersion
filter dispersion
.It Cm jitter
filter jitter
.It Cm bias
unicast/broadcast bias
.It Cm xleave
interleave delay (see
.Lk xleave.html "NTP Interleaved Modes" )
.El
The
.Cm bias
variable is calculated when the first broadcast packet is received
after the calibration volley.
It represents the offset of the broadcast subgraph relative to the
unicast subgraph.
The
.Cm xleave
variable appears only for the interleaved symmetric and interleaved modes.
It represents the internal queuing, buffering and transmission delays
for the preceding packet.
.Pp
When the NTPv4 daemon is compiled with the OpenSSL software library,
additional peer variables are displayed, including the following:
.Bl -tag -width "something" -compact -offset indent
.It Variable
Description
.It Cm flags
peer flags (see Autokey specification)
.It Cm host
Autokey server name
.It Cm flags
peer flags (see Autokey specification)
.It Cm signature
OpenSSL digest/signature scheme
.It Cm initsequence
initial key id
.It Cm initkey
initial key index
.It Cm timestamp
Autokey signature timestamp
.It Cm ident
Autokey group name for this association
.El

.Ss Clock Variables
The following clock variables appear in the
.Ic clocklist
billboard for each association with a reference clock.
Not all variables are displayed in some configurations.
.Bl -tag -width "something" -compact -offset indent
.It Variable
Description
.It Cm associd
association id
.It Cm status
.Lk decode.html#clock "clock status word"
.It Cm device
device description
.It Cm timecode
ASCII time code string (specific to device)
.It Cm poll
poll messages sent
.It Cm noreply
no reply
.It Cm badformat
bad format
.It Cm baddata
bad date or time
.It Cm fudgetime1
fudge time 1
.It Cm fudgetime2
fudge time 2
.It Cm stratum
driver stratum
.It Cm refid
driver reference id
.It Cm flags
driver flags
.El
	_END_PROG_MDOC_DESCRIP;
};
