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File Date Author Commit
 .gitignore 2018-02-26 Richard Cochran Richard Cochran [ab8dc2] nsm: Implement the NetSync Monitor query.
 CODING_STYLE.org 2013-02-06 Richard Cochran Richard Cochran [89562f] Add a coding style document.
 COPYING 2011-11-01 Richard Cochran Richard Cochran [af380e] Add the license, a readme, and some header files.
 README.org 2017-11-25 Richard Cochran Richard Cochran [dacf9d] Add an acknowledgment in the readme for Meinberg.
 address.h 2017-08-09 Feras Daoud Feras Daoud [754643] ptp4l: Add IPoIB interface support for ptp4l
 bmc.c 2013-07-14 Richard Cochran Richard Cochran [46db40] Become the grand master when all alone.
 bmc.h 2011-11-04 Richard Cochran Richard Cochran [c9a15e] Add the best master clock algorithm.
 clock.c 2018-03-31 Richard Cochran Richard Cochran [992e29] Make the LIST_FOREACH_SAFE publicly visible.
 clock.h 2018-03-12 Michael Brown Michael Brown [c9f3fa] clock: Remove open-coded conversion of struct t...
 clockadj.c 2017-06-16 Brian Olson Brian Olson [7c6a98] added workaround for ticks being returned as ze...
 clockadj.h 2014-06-18 Miroslav Lichvar Miroslav Lichvar [fefd5b] Set TAI offset of system clock.
 clockcheck.c 2013-10-22 Miroslav Lichvar Miroslav Lichvar [ed379b] Add clock sanity check.
 clockcheck.h 2013-10-22 Miroslav Lichvar Miroslav Lichvar [ed379b] Add clock sanity check.
 config.c 2018-03-03 Richard Cochran Richard Cochran [8857ad] Expand and rationalize time stamping options.
 config.h 2018-03-03 Richard Cochran Richard Cochran [8857ad] Expand and rationalize time stamping options.
 contain.h 2014-06-02 Richard Cochran Richard Cochran [8a92b1] Fix a trivial spelling mistake in a comment.
 ddt.h 2013-02-24 Geoff Salmon Geoff Salmon [e91997] adds CLOCK_DESCRIPTION struct
 default.cfg 2017-11-26 Richard Cochran Richard Cochran [d89d26] Add a configuration file option to enable the N...
 dm.h 2012-04-05 Richard Cochran Richard Cochran [a8a540] Expose the peer delay flavors in their own head...
 ds.h 2017-01-05 Miroslav Lichvar Miroslav Lichvar [0309a8] Update TAI-UTC offset
 ether.h 2017-08-09 Feras Daoud Feras Daoud [754643] ptp4l: Add IPoIB interface support for ptp4l
 fault.c 2014-11-01 Richard Cochran Richard Cochran [e706f4] port: allow running a boundary clock with multi...
 fault.h 2015-11-03 Richard Cochran Richard Cochran [62ce44] fault: protect header against multiple inclusion.
 fd.h 2017-07-10 Hangbin Liu Hangbin Liu [c149a3] port: add FD_RTNL event to track per-port status
 filter.c 2013-10-29 Miroslav Lichvar Miroslav Lichvar [ed9e0f] Add median filter.
 filter.h 2013-10-29 Miroslav Lichvar Miroslav Lichvar [ed9e0f] Add median filter.
 filter_private.h 2013-10-29 Miroslav Lichvar Miroslav Lichvar [2c9718] Add modular filter interface.
 foreign.h 2011-11-12 Richard Cochran Richard Cochran [49cd10] Implement the PTP clock.
 fsm.c 2016-10-27 Richard Cochran Richard Cochran [b738af] fsm: Make the transition out of INITIALIZING pa...
 fsm.h 2016-10-27 Richard Cochran Richard Cochran [b738af] fsm: Make the transition out of INITIALIZING pa...
 gPTP.cfg 2017-11-26 Richard Cochran Richard Cochran [d89d26] Add a configuration file option to enable the N...
 hash.c 2015-08-08 Richard Cochran Richard Cochran [8601aa] Introduce a simple hash table implementation.
 hash.h 2015-08-08 Richard Cochran Richard Cochran [8601aa] Introduce a simple hash table implementation.
 hwstamp_ctl.8 2014-06-04 Richard Cochran Richard Cochran [abd433] Bump the date on the hwstamp_ctl man page.
 hwstamp_ctl.c 2014-09-17 Miroslav Lichvar Miroslav Lichvar [9ddd2a] Fix copying of device name to ifreq.
 incdefs.sh 2018-02-15 Richard Cochran Richard Cochran [4842d2] Introduce peer to peer one step.
 linreg.c 2015-03-26 Miroslav Lichvar Miroslav Lichvar [5d6c34] linreg: use sample weight.
 linreg.h 2014-03-13 Miroslav Lichvar Miroslav Lichvar [a5890c] Add an adaptive servo based on linear regression.
 makefile 2018-04-05 Richard Cochran Richard Cochran [84fa13] Correct the make install target.
 mave.c 2018-03-01 Michael Brown Michael Brown [288810] tmv: Add missing uses of tmv_zero()
 mave.h 2013-10-29 Miroslav Lichvar Miroslav Lichvar [2c9718] Add modular filter interface.
 missing.h 2018-03-31 Richard Cochran Richard Cochran [992e29] Make the LIST_FOREACH_SAFE publicly visible.
 mmedian.c 2018-03-01 Michael Brown Michael Brown [1b7ff8] tmv: Generalise tmv_eq() to tmv_cmp()
 mmedian.h 2013-10-29 Miroslav Lichvar Miroslav Lichvar [ed9e0f] Add median filter.
 msg.c 2021-06-22 Richard Cochran Richard Cochran [c15da0] Validate the messageLength field of incoming me...
 msg.h 2018-02-15 Richard Cochran Richard Cochran [4842d2] Introduce peer to peer one step.
 notification.h 2014-05-06 Jiri Benc Jiri Benc [c8c6f7] Event notification: port state
 nsm.c 2018-03-12 Michael Brown Michael Brown [29a99a] msg: Represent hw_timestamp "ts" field as tmv_t
 ntpshm.c 2015-08-14 Richard Cochran Richard Cochran [4c9c44] config: convert 'ntpshm_segment' to the new sch...
 ntpshm.h 2015-08-14 Richard Cochran Richard Cochran [4c9c44] config: convert 'ntpshm_segment' to the new sch...
 nullf.c 2015-06-08 Richard Cochran Richard Cochran [fa7914] Add a servo that inhibits all frequency adjustment
 nullf.h 2015-06-08 Richard Cochran Richard Cochran [fa7914] Add a servo that inhibits all frequency adjustment
 pdt.h 2011-11-01 Richard Cochran Richard Cochran [af380e] Add the license, a readme, and some header files.
 phc.c 2013-06-06 Ken ICHIKAWA Ken ICHIKAWA [67c925] Don't return bogus clock id
 phc.h 2013-04-19 Jiri Benc Jiri Benc [400427] phc2sys: enable PPS output from PHC
 phc2sys.8 2017-10-18 Hangbin Liu Hangbin Liu [5ce04f] phc2sys: update '-s' option
 phc2sys.c 2018-03-31 Richard Cochran Richard Cochran [4e3593] phc2sys: Clean up before exiting.
 phc_ctl.8 2014-07-18 Jacob Keller Jacob Keller [bdb6a3] linuxptp: add phc_ctl program to help debug PHC...
 phc_ctl.c 2017-09-11 Miroslav Lichvar Miroslav Lichvar [d513ec] phc_ctl: fix adj command to accept negative off...
 pi.c 2015-08-14 Richard Cochran Richard Cochran [177a71] config: convert 'pi_integral_norm_max' to the n...
 pi.h 2015-08-14 Richard Cochran Richard Cochran [177a71] config: convert 'pi_integral_norm_max' to the n...
 pmc.8 2018-03-21 Peter Schneider Peter Schneider [c4e587] pmc: Documentation for long opts / cfg file
 pmc.c 2018-03-21 Peter Schneider Peter Schneider [c96dea] pmc: add long options and configuration file
 pmc_common.c 2018-03-30 Richard Cochran Richard Cochran [d46540] pmc: Initialize variable on the stack.
 pmc_common.h 2015-08-10 Richard Cochran Richard Cochran [bbbc0c] pmc: require a configuration for creating a PMC...
 port.c 2018-04-06 Miroslav Lichvar Miroslav Lichvar [582e18] port: fix buffer overflow in net_sync_resp_appe...
 port.h 2017-07-10 Hangbin Liu Hangbin Liu [25ec8a] clock: remove rtnl fd on clock
 print.c 2017-01-17 Miroslav Lichvar Miroslav Lichvar [0f6c69] Add options to tag ptp4l and phc2sys log messages.
 print.h 2017-01-17 Miroslav Lichvar Miroslav Lichvar [0f6c69] Add options to tag ptp4l and phc2sys log messages.
 ptp4l.8 2017-11-26 Richard Cochran Richard Cochran [d89d26] Add a configuration file option to enable the N...
 ptp4l.c 2017-11-25 Richard Cochran Richard Cochran [ae2889] msg: Share a static global more globally.
 raw.c 2018-03-01 Richard Cochran Richard Cochran [b01e84] raw: Fix valgrind setsockopt warning.
 raw.h 2015-08-21 Richard Cochran Richard Cochran [852c28] config: convert 'p2p_dst_mac', letting it be a ...
 rtnl.c 2017-10-09 Hangbin Liu Hangbin Liu [6d1e2a] rtnl: add function rtnl_get_ts_label to get int...
 rtnl.h 2017-10-09 Hangbin Liu Hangbin Liu [6d1e2a] rtnl: add function rtnl_get_ts_label to get int...
 servo.c 2017-04-04 Burkhard Ilsen Burkhard Ilsen [7e1cca] servo: NULL pointer check for servo constructors
 servo.h 2015-08-12 Richard Cochran Richard Cochran [e8a295] config: convert the 'max_frequency' option to t...
 servo_private.h 2015-03-26 Miroslav Lichvar Miroslav Lichvar [f0b0c1] servo: add support for weighted samples.
 sk.c 2018-04-06 Richard Cochran Richard Cochran [5ee415] sk: Silence gcc warning about unused variable.
 sk.h 2016-07-29 Richard Cochran Richard Cochran [44a469] sk: Add a method to obtain a socket for utility...
 stats.c 2013-02-07 Miroslav Lichvar Miroslav Lichvar [3136e3] Add summary statistics.
 stats.h 2013-02-07 Miroslav Lichvar Miroslav Lichvar [3136e3] Add summary statistics.
 sysoff.c 2013-02-07 Miroslav Lichvar Miroslav Lichvar [42b305] phc2sys: Print clock reading delay.
 sysoff.h 2013-02-07 Miroslav Lichvar Miroslav Lichvar [42b305] phc2sys: Print clock reading delay.
 timemaster.8 2016-07-14 Miroslav Lichvar Miroslav Lichvar [395544] timemaster: add option to specify first SHM seg...
 timemaster.c 2017-01-17 Miroslav Lichvar Miroslav Lichvar [117ed5] timemaster: check support for SW time stamping.
 tlv.c 2017-11-26 Richard Cochran Richard Cochran [3a264e] tlv: Introduce the NetSync Monitor TLVs.
 tlv.h 2017-11-26 Richard Cochran Richard Cochran [3a264e] tlv: Introduce the NetSync Monitor TLVs.
 tmv.h 2017-11-27 Richard Cochran Richard Cochran [7a2013] tmv: Add a method to convert to a struct Timest...
 transport.c 2017-10-09 Hangbin Liu Hangbin Liu [8923bc] transport: pass struct interface to transport_open
 transport.h 2018-02-15 Richard Cochran Richard Cochran [4842d2] Introduce peer to peer one step.
 transport_private.h 2017-10-09 Hangbin Liu Hangbin Liu [8923bc] transport: pass struct interface to transport_open
 tsproc.c 2018-03-01 Michael Brown Michael Brown [ffc5b9] tmv: Add tmv_sign()
 tsproc.h 2015-03-26 Miroslav Lichvar Miroslav Lichvar [06fcfe] tsproc: add raw and weighting modes.
 udp.c 2017-10-09 Hangbin Liu Hangbin Liu [8923bc] transport: pass struct interface to transport_open
 udp.h 2012-03-17 Richard Cochran Richard Cochran [9d4d68] Add missing release method to the UDPv4 transport.
 udp6.c 2017-10-09 Hangbin Liu Hangbin Liu [8923bc] transport: pass struct interface to transport_open
 udp6.h 2015-08-15 Richard Cochran Richard Cochran [6fa42d] config: convert 'udp6_scope' to the new scheme.
 uds.c 2017-10-09 Hangbin Liu Hangbin Liu [8923bc] transport: pass struct interface to transport_open
 uds.h 2015-08-21 Richard Cochran Richard Cochran [e27b03] config: convert 'uds_address' to the new scheme.
 util.c 2017-11-27 Richard Cochran Richard Cochran [0483bf] util: Relocate utility functions from pmc.c.
 util.h 2017-11-27 Richard Cochran Richard Cochran [0483bf] util: Relocate utility functions from pmc.c.
 version.c 2012-12-09 Richard Cochran Richard Cochran [c31198] Add utility functions to get the software versi...
 version.h 2012-12-09 Richard Cochran Richard Cochran [c31198] Add utility functions to get the software versi...
 version.sh 2021-07-02 Richard Cochran Richard Cochran [29f5db] Version 1.9.3

Read Me

* Introduction

  This software is an implementation of the Precision Time Protocol
  (PTP) according to IEEE standard 1588 for Linux. The dual design
  goals are to provide a robust implementation of the standard and to
  use the most relevant and modern Application Programming Interfaces
  (API) offered by the Linux kernel. Supporting legacy APIs and other
  platforms is not a goal.

* License

  The software is copyrighted by the authors and is licensed under the
  GNU General Public License. See the file, COPYING, for details of
  the license terms.

* Features

  - Supports hardware and software time stamping via the Linux
    SO_TIMESTAMPING socket option.

  - Supports the Linux PTP Hardware Clock (PHC) subsystem by using the
    clock_gettime family of calls, including the new clock_adjtimex
    system call.

  - Implements Boundary Clock (BC) and Ordinary Clock (OC).

  - Transport over UDP/IPv4, UDP/IPv6, and raw Ethernet (Layer 2).

  - Supports IEEE 802.1AS-2011 in the role of end station.

  - Modular design allowing painless addition of new transports and
    clock servos.

* Getting the Code

  You can download the latest released version at Source Forge.

  http://sourceforge.net/projects/linuxptp/files/latest/download

  The source code is managed using the git version control system. To
  get your own copy of the project sources, use the following command.

#+BEGIN_EXAMPLE
  git clone git://git.code.sf.net/p/linuxptp/code linuxptp
#+END_EXAMPLE

  If the git protocol is blocked by your local area network, then you
  can use the alternative HTTP protocol instead.

#+BEGIN_EXAMPLE
  git clone http://git.code.sf.net/p/linuxptp/code linuxptp
#+END_EXAMPLE

* System Requirements

  In order to run this software, you need Linux kernel
  version 3.0 or newer, and the kernel header files must available at
  compile time.

  In addition, you will also need to have either:

  1. A supported Ethernet MAC device.

  2. A supported PHY device paired with a MAC that allows time
     stamping in the PHY (indicated by PHY=Y in the table below).

** Linux Kernel Support

   In order to support PTP, the operating system needs to provide two
   services: network packet time stamping and clock control. In 2009,
   Patrick Ohly added a new socket option called SO_TIMESTAMPING for
   packet time stamping, especially for PTP. This work appeared in
   Linux version 2.6.30.

   In July of 2011, the PTP Hardware Clock (PHC) subsystem was merged
   into Linux version 3.0. The PHC code provides a driver framework and
   the user space API for clock control.

** Ethtool Support

   Starting with version 3.5 of the Linux kernel, you can query the
   time stamping capabilities of a network interface using the
   ETHTOOL_GET_TS_INFO ioctl. Using ethtool version 3.4 or later, you
   can check your system's time stamping support as shown in the
   following example.

#+BEGIN_EXAMPLE
  ethtool -T eth0
#+END_EXAMPLE

   If the ethtool ioctl is available, then the ptp4l program will use
   it in order to discover the proper PHC device.

** Driver Support Matrix

   The following two tables list the drivers that support the PHC
   subsystem and the Linux kernel version when they first appeared.
   These drivers will create a PHC device for controlling the hardware
   clock.

*** Hardware Timestamping - PHY

    |---------+-------------------------------+---------|
    | Driver  | Hardware                      | Version |
    |---------+-------------------------------+---------|
    | dp83640 | National Semiconductor PHYTER |     3.0 |
    |---------+-------------------------------+---------|

*** Hardware Timestamping - MAC

    |------------+--------------------------+---------|
    | Driver     | Hardware                 | Version |
    |------------+--------------------------+---------|
    | amd-xgbe   | AMD 10GbE Ethernet Soc   |    3.17 |
    | bfin_mac   | Analog Blackfin          |     3.8 |
    | bnx2x      | Broadcom NetXtremeII 10G |    3.18 |
    | cpts       | Texas Instruments am335x |     3.8 |
    | e1000e     | Intel 82574, 82583       |     3.9 |
    | fm10k      | Intel FM10000            |    3.18 |
    | fec        | Freescale i.mx6          |     3.8 |
    | gianfar    | Freescale eTSEC PowerPC  |     3.0 |
    | i40e       | Intel XL710 Family       |    3.14 |
    | igb        | Intel 82576, 82580       |     3.5 |
    | ixgbe      | Intel 82599              |     3.5 |
    | mlx4       | Mellanox 40G PCI         |    3.14 |
    | ptp_ixp46x | Intel IXP465             |     3.0 |
    | ptp_phc    | Lapis EG20T PCH          |     3.5 |
    | sfc        | Solarflare SFC9000       |     3.7 |
    | stmmac     | STM Synopsys IP Core     |    3.10 |
    | tg3        | Broadcom Tigon3 PCI      |     3.8 |
    | tilegx     | Tilera GBE/XGBE          |    3.12 |
    |------------+--------------------------+---------|

*** Software Timestamping

    The table below shows the Linux drivers that support software time
    stamping. In addition, the 'PHY' column indicates whether the
    Ethernet MAC driver can support a PTP Hardware Clock in an
    external PHY. The letter 'Y' in this column means that if you
    design a mother board that combines such a MAC with a PTP capable
    PHY, then it will work with the Linux PHC subsystem.

    |--------------+--------------------------+---------+-----|
    | Driver       | Hardware                 | Version | PHY |
    |--------------+--------------------------+---------+-----|
    | 3c59x        | 3Com EtherLink PCI       |    3.14 | N   |
    | altera_tse   | Altera Triple-Speed MAC  |    3.15 | Y   |
    | bna          | Brocade 1010/1020 10Gb   |    3.14 | N   |
    | bnx2x        | Broadcom Everest         |     3.5 | N   |
    | davinci_emac | TI DaVinci, Sitara       |     3.1 | Y   |
    | dnet         | Dave Ethernet MAC        |     3.1 | Y   |
    | e100         | Intel PRO/100            |     3.5 | N   |
    | e1000        | Intel PRO/1000 PCI/PCI-X |     3.5 | N   |
    | e1000e       | Intel PRO/1000 PCIe      |     3.5 | N   |
    | emaclite     | Xilinx Ethernet Lite     |     3.1 | Y   |
    | ethoc        | OpenCores 10/100 MAC     |     3.1 | Y   |
    | fec          | Freescale Coldfire       |     3.1 | Y   |
    | fec_mpc52xx  | Freescale MPC5200        |     3.1 | Y   |
    | forcedeth    | NVIDIA nForce            |     3.5 | N   |
    | fs_enet      | Freescale MPC512x        |     3.1 | Y   |
    | genet        | Broadcom GENET           |    3.15 | Y   |
    | ixp4xx_eth   | Intel IXP4xx             |     3.0 | Y   |
    | lib8390      | Asix AX88796             |     3.1 | Y   |
    | lib8390      | Various 8390 based HW    |     3.1 | N   |
    | ll_temac     | Xilinx LL TEMAC          |     3.1 | Y   |
    | macb         | Atmel AT32, AT91         |     3.1 | Y   |
    | mv643xx_eth  | Marvell Discovery, Orion |     3.1 | Y   |
    | pxa168_eth   | Marvell pxa168           |     3.1 | Y   |
    | r6040        | RDC Ethernet MAC         |     3.1 | Y   |
    | r8169        | Realtek 8169/8168/8101   |     3.4 | N   |
    | samsun-sxgbe | Samsung SXGBE 10G        |    3.15 | Y   |
    | smsc911x     | SMSC LAN911x, LAN921x    |     3.1 | Y   |
    | smsc9420     | SMSC LAN9420 PCI         |     3.1 | Y   |
    | stmmac       | STM Synopsys IP Core     |     3.1 | Y   |
    | tg3          | Broadcom Tigon3 PCI      |     3.1 | Y   |
    | ucc_geth     | Freescale QE Gigabit     |     3.1 | Y   |
    | usbnet       | USB network devices      |     3.2 | Y/N |
    | xgene-enet   | APM X-Gene SoC           |    3.17 | Y   |
    |--------------+--------------------------+---------+-----|

* Installation

** Linux kernel

   There are many ways of getting a precompiled Linux kernel or
   compiling your own, so this section is only meant as an example. It
   is important to have the kernel headers available when compiling
   the Linux PTP stack.

#+BEGIN_EXAMPLE
   export ARCH=x86
   export CROSS_COMPILE=
   export KBUILD_OUTPUT=/home/richard/kernel/ptp_debian
   mkdir -p $KBUILD_OUTPUT
   cp /boot/config-2.6.38-bpo.2-686 $KBUILD_OUTPUT/.config
   make oldnoconfig
   make menuconfig
   time make -j4
   make headers_install
#+END_EXAMPLE

   Here is a table of kernel configuration options needed for PTP
   support. In addtion to these, you should enable the specific
   Ethernet MAC and PHY drivers for your hardware.

   |---------------------------------+-----------------------------|
   | Option                          | Description                 |
   |---------------------------------+-----------------------------|
   | CONFIG_PPS                      | Required                    |
   | CONFIG_NETWORK_PHY_TIMESTAMPING | Timestamping in PHY devices |
   | PTP_1588_CLOCK                  | PTP clock support           |
   |---------------------------------+-----------------------------|

** PTP stack

   1. Just type 'make'

   2. If you compiled your own kernel (and the headers are not
      installed into the system path), then you should set the
      KBUILD_OUTPUT environment variable as in the example, above.

   3. In order to install the programs and man pages into /usr/local,
      run the 'make install' target. You can change the installation
      directories by setttings the variables prefix, sbindir, mandir,
      and man8dir on the make command line.

* Getting Involved

  The software development is hosted at Source Forge.

  https://sourceforge.net/projects/linuxptp/

** Reporting Bugs

   Please report any bugs or other issues with the software to the
   linuxptp-users mailing list.

   https://lists.sourceforge.net/lists/listinfo/linuxptp-users

** Development

   If you would like to get involved in improving the software, please
   join the linuxptp-devel mailing list.

   https://lists.sourceforge.net/lists/listinfo/linuxptp-devel

*** Submitting Patches

   1. Before submitting patches, please make sure that you are starting
      your work on the *current HEAD* of the git repository.

   2. Please checkout the ~CODING_STYLE.org~ file for guidelines on how to
      properly format your code.

   3. Describe your changes. Each patch will be reviewed, and the reviewers
      need to understand why you did what you did.

   4. *Sign-Off* each commit, so the changes can be properly attributed to
      you and you explicitely give your agreement for distribution under
      linuxptp's license. Signing-off is as simple as:

      #+BEGIN_EXAMPLE
      git commit -s
      #+END_EXAMPLE

      or by adding the following line (replace your real name and email)
      to your patch:

      #+BEGIN_EXAMPLE
      Signed-off-by: Random J Developer <random@developer.example.org>
      #+END_EXAMPLE

   5. Finally, send your patches via email to the linuxptp-devel mailing
      list, where they will be reviewed, and eventually be included in the
      official code base.

      #+BEGIN_EXAMPLE
      git send-email --to linuxptp-devel@lists.sourceforge.net origin/master
      #+END_EXAMPLE

* Thanks

  Thanks to AudioScience Inc for sponsoring the 8021.AS support.

  - http://www.audioscience.com

  Thanks to Exablaze for donating an ExaNIC X10

  - http://exablaze.com/exanic-x10

  Thanks to Intel Corporation for donating four NICs, the 82574,
  82580, 82599, and the i210.

  - http://www.intel.com
  - http://e1000.sourceforge.net

  Thanks to Meinberg Funkuhren for donating a LANTIME M1000.

  - https://www.meinbergglobal.com

  For testing I use an OTMC 100 grandmaster clock donated by OMICRON Lab.

  - http://www.omicron-lab.com/ptp
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