This directory and its subdirectories contain NTPSec, a security-hardened implementation of Network Time Protocol Version 4. You can browse a summary of differences from legacy NTP here:

https://docs.ntpsec.org/latest/ntpsec.html

The contents of the base directory are given in this file. The contents of subdirectories are usually given in the README files in each subdirectory.

The base directory ./ contains the configuration files, source directories and related stuff:

INSTALL.adoc

Generic installation instructions.

LICENSE.adoc

Software licensing agreement.

NEWS.adoc

What’s new in this release.

README.adoc

This file.

VERSION

The version stamp, to be used by scripts and programs.

lgtm.template.yml

Configuration file for LGTM code analysis

attic/

Directory containing source code that is not part of a normal installation. Things can disappear from here at any time.

buildprep

Executable script for fetching installation prerequisites.

contrib/

Directory containing contributed scripts, dragons dwell here. Some of this might eventually move to being supported code.

devel/

Documentation and small tools aimed at developers. Includes a hacking guide and a tour of the internals.

docs/

Directory containing a complete set of documentation on building and configuring a NTP server or client. The files are in asciidoc markup. This replaces the 'html' directory of previous versions, but html can be generated from it.

etc/

Directory containing a motley collection of configuration files and launch scripts for various systems. For example only.

include/

Directory containing include header files used by most programs in the distribution.

libjsmn/

A minimal JSON library used by the GPSD-JSON driver.

libntp/

Directory containing library source code used by most programs in the distribution.

libparse/

This directory contains the files making up the parser for the parse refclock driver. For reasonably sane clocks this refclock drivers allows a refclock implementation by just providing a conversion routine and the appropriate NTP parameters

ntpclients/

Directory containing sources for clients - utility programs to query local and remote NTP installations for log status, state variables, and other timekeeping information. The term "clients" is used quite loosely here; any tool that is not a multi-file C program probably lives in this directory.

ntpd/

Sources for the main time-synchronization daemon.

ntpfrob/

The ntpfrob utility collects several small diagnostic functions for reading and tweaking the local clock hardware, including reading the clock tick rate, precision, and jitter.

ntptime/

Directory containing a utility for reading and modifying kernel parameters related to the local clock.

packaging/

Parts and guidance for distribution packagers.

pylib/

Installable Python helper modules for scripts.

tests/

Self-test code.

waf

A copy of the waf builder. This is the engine used to configure and build the codebase.

wafhelpers/

A library of Python procedures used by the waf build system.

wscript

NTP-specific waf rules.

www/

Sample ntpviz files