.. index:: pair: group; Set clock time
.. _doxid-group__ptp-set__time:

Set clock time
==============

.. toctree::
	:hidden:

Check that time can be set for PTP device associated with the tested network interface.

Scenarios: X3-PTP001.



#. Find out PTP device associated with the IUT interface, call **open()** to get its FD.

#. Get initial timestamp from the PTP device.

#. Call **clock_settime()** to set current time for the PTP device according to **ts**.

#. Call **clock_gettime()** to get current time from the PTP device, check that difference from the previously set value is not big.

#. Sleep for a while (between **min_sleep** and **max_sleep** seconds).

#. Call **clock_gettime()** to get another timestamp from the PTP device. Check that the timestamp advanced according to the delay between calls.

Yurij Plotnikov `Yurij.Plotnikov@arknetworks.am <mailto:Yurij.Plotnikov@arknetworks.am>`__



.. rubric:: Parameters:

.. list-table::
	:widths: 20 80

	*
		- env

		- 
		  Testing environment:
		  
		  * :ref:`env.peer2peer <doxid-group__env-peer2peer>`

	*
		- ts

		- Timestamp to set, in seconds (negative value means current time)

	*
		- min_sleep

		- Minimum time to sleep between clock_gettime() calls, seconds

	*
		- max_sleep

		- Maximum time to sleep between clock_gettime() calls, seconds