# Copyright Notice

| "Clone me," says Dolly sheepishly.

The following copyright notice applies to all files collectively called the Network Time Protocol Version 4 Distribution. Unless specifically declared otherwise in an individual file, this entire notice applies as if the text was explicitly included in the file.

    ***********************************************************************
    *                                                                     *
    * Copyright University of Delaware                                    *
    *                                                                     *
    * Permission to use, copy, modify, and distribute this software and   *
    * its documentation for any purpose with or without fee is hereby     *
    * granted, provided that the above copyright notice appears in all    *
    * copies and that both the copyright notice and this permission       *
    * notice appear in supporting documentation, and that the name        *
    * University of Delaware not be used in advertising or publicity      *
    * pertaining to distribution of the software without specific,        *
    * written prior permission. The University of Delaware makes no       *
    * representations about the suitability this software for any         *
    * purpose. It is provided "as is" without express or implied          *
    * warranty.                                                           *
    *                                                                     *
    ***********************************************************************

Content starting in 2011 from Harlan Stenn, Danny Mayer, and Martin Burnicki is:

    ***********************************************************************
    *                                                                     *
    * Copyright Network Time Foundation                                   *
    * All Rights Reserved                                                 *
    *                                                                     *
    * Redistribution and use in source and binary forms, with or without  *
    * modification, are permitted provided that the following conditions  *
    * are met:                                                            *
    * 1. Redistributions of source code must retain the above copyright   *
    *    notice, this list of conditions and the following disclaimer.    *
    * 2. Redistributions in binary form must reproduce the above          *
    *    copyright notice, this list of conditions and the following      *
    *    disclaimer in the documentation and/or other materials provided  *
    *    with the distribution.                                           *
    *                                                                     *
    * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS  *
    * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED   *
    * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE  *
    * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE    *
    * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR *
    * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT   *
    * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR  *
    * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF          *
    * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT           *
    * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE   *
    * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH    *
    * DAMAGE.                                                             *
    ***********************************************************************

The following individuals have contributed significantly to NTPsec:

- Eric S. Raymond <esr@thyrsus.com> Massive code reduction/refactoring/hardening, documentation cleanup and update, new refclock configuration syntax.

- Gary E. Miller <gem@rellim.com> Code ANSIfication, testing, ntpviz

- Daniel Fox Franke <dfranke@dfranke.us> CVE fixes, protocol machine refactoring.

- Hal Murray <hmurray@megapathdsl.net> Code cleanups, bug hunting, sage advice.

- Amar Takhar <verm@darkbeer.org> waf build recipe.

- Matt Selsky <matthew.selsky@twosigma.com> Documentation corrections, compiler warning and port cleanup.

The following individuals contributed in part to the Network Time Protocol Distribution Version 4 ("NTP Classic") and are acknowledged as authors of this work.

- Takao Abe <takao_abe@xurb.jp> Clock driver for JJY receivers

- Karl Berry <karl@owl.HQ.ileaf.com> syslog to file option

- Marc Brett <Marc.Brett@westgeo.com> Magnavox GPS clock driver (removed in NTPsec)

- Piete Brooks <Piete.Brooks@cl.cam.ac.uk> Trimble PARSE support

- Nelson B Bolyard <nelson@bolyard.me> update and complete broadcast and crypto features in sntp

- Jean-Francois Boudreault <Jean-Francois.Boudreault@viagenie.qc.ca> IPv6 support

- Reg Clemens <reg@dwf.com> Oncore driver (Current maintainer)

- Sven Dietrich <sven_dietrich@trimble.com> Palisade reference clock driver

- Torsten Duwe <duwe@immd4.informatik.uni-erlangen.de> Linux port

- Dennis Ferguson <dennis@mrbill.canet.ca> foundation code for NTP Version 2 as specified in RFC 1119

- John Hay <jhay@icomtek.csir.co.za> IPv6 support and testing

- Dave Hart <davehart@davehart.com> General maintenance

- Glenn Hollinger <glenn@herald.usask.ca> GOES clock driver (removed in NTPsec)

- Jeff Johnson <jbj@chatham.usdesign.com> massive prototyping overhaul

- Hans Lambermont <Hans.Lambermont@nl.origin-it.com> or <H.Lambermont@chello.nl> ntpsweep

- Poul-Henning Kamp <phk@FreeBSD.ORG> Oncore driver (Original author)

- Frank Kardel <kardel (at) ntp (dot) org> PARSE <GENERIC> (driver 14 reference clocks), STREAMS modules for PARSE, support scripts, syslog cleanup, dynamic interface handling

- Johannes Maximilian Kuehn <kuehn@ntp.org> Rewrote sntp to comply with NTPv4 specification

- Craig Leres <leres@ee.lbl.gov> 4.4BSD port, ppsclock, Magnavox GPS clock driver

- Louis A. Mamakos <louie@ni.umd.edu> MD5-based authentication

- Lars H. Mathiesen <thorinn@diku.dk> adaptation of foundation code for Version 3 as specified in RFC 1305

- Danny Mayer <mayer@ntp.org>Network I/O, Windows Port, Code Maintenance

- David L. Mills <mills@udel.edu> Version 4 foundation, precision kernel; clock drivers: 1, 3, 4, 6, 7, 11, 13, 18, 19, 22, 36

- Jeffrey Mogul <mogul@pa.dec.com> ntptrace utility

- Rob Neal <neal@ntp.org> config/parse code maintenance

- Jack Sasportas <jack@innovativeinternet.com> Saved a Lot of space on the stuff in the html/pic/ subdirectory

- Michael Shields <shields@tembel.org> USNO clock driver

- Harlan Stenn <harlan@pfcs.com> General maintenance (see the ChangeLog)

- Ajit Thyagarajan <ajit@ee.udel.edu>IP multicast/anycast support

- Brian Utterback <brian.utterback@oracle.com> General codebase

- Loganaden Velvindron <loganaden@gmail.com> Sandboxing (libseccomp) support

- Paul A Vixie <vixie@vix.com> TrueTime GPS driver, generic TrueTime clock driver

The following people contributed code to NTP Classic which has since been removed:

- Mark Andrews <mark_andrews@isc.org> Leitch atomic clock controller

- Bernd Altmeier <altmeier@atlsoft.de> hopf Elektronik serial line and PCI-bus devices

- Viraj Bais <vbais@mailman1.intel.com> and Clayton Kirkwood <kirkwood@striderfm.intel.com> port to WindowsNT 3.5

- Michael Barone <michael,barone@lmco.com> GPSVME fixes

- Greg Brackley <greg.brackley@bigfoot.com> Major rework of WINNT port. Clean up recvbuf and iosignal code into separate modules.

- Piete Brooks <Piete.Brooks@cl.cam.ac.uk> MSF clock driver

- Steve Clift <clift@ml.csiro.au> OMEGA clock driver

- Casey Crellin <casey@csc.co.za> vxWorks (Tornado) port and help with target configuration

- Sven Dietrich <sven_dietrich@trimble.com> NT adj. residuals, integrated Greg’s Winnt port.

- John A. Dundas III <dundas@salt.jpl.nasa.gov> Apple A/UX port

- Dave Hart <davehart@davehart.com> Windows port interpolation rewrite

- Mike Iglesias <iglesias@uci.edu> DEC Alpha port

- Jim Jagielski <jim@jagubox.gsfc.nasa.gov> A/UX port

- Johannes Maximilian Kuehn <kuehn@ntp.org> ntpq saveconfig

- William L. Jones <jones@hermes.chpc.utexas.edu> RS/6000 AIX modifications, HPUX modifications

- Dave Katz <dkatz@cisco.com> RS/6000 AIX port

- George Lindholm <lindholm@ucs.ubc.ca> SunOS 5.1 port

- Wolfgang Moeller <moeller@gwdgv1.dnet.gwdg.de> VMS port

- Tom Moore <tmoore@fievel.daytonoh.ncr.com> i386 svr4 port

- Kamal A Mostafa <kamal@whence.com> SCO OpenServer port

- Derek Mulcahy <derek@toybox.demon.co.uk> and Damon Hart-Davis <d@hd.org> ARCRON MSF clock driver

- Rob Neal <neal@ntp.org> Bancomm refclock

- Rainer Pruy <Rainer.Pruy@informatik.uni-erlangen.de> monitoring/trap scripts, statistics file handling

- Dirce Richards <dirce@zk3.dec.com> Digital UNIX V4.0 port

- Wilfredo Sánchez <wsanchez@apple.com> added support for NetInfo

- Nick Sayer <mrapple@quack.kfu.com> SunOS streams modules

- Ray Schnitzler <schnitz@unipress.com> Unixware1 port

- Jeff Steinman <jss@pebbles.jpl.nasa.gov> Datum PTS clock driver

- Harlan Stenn <harlan@pfcs.com> GNU automake/autoconfigure makeover

- Kenneth Stone <ken@sdd.hp.com> HP-UX port

- Tomoaki TSURUOKA <tsuruoka@nc.fukuoka-u.ac.jp>TRAK clock driver

- Brian Utterback <brian.utterback@oracle.com> Solaris issues

- Ulrich Windl <Ulrich.Windl@rz.uni-regensburg.de> corrected and validated HTML documents according to the HTML DTD

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