tree 5af65f920d34e9a7ff68f882307389ca6a2df782
parent 6f9a2ee25cf8061072602cfa29c4363f7745b367
author Manojkiran Eda <manojkiran.eda@gmail.com> 1571131851 +0530
committer Ratan Gupta <ratagupt@linux.vnet.ibm.com> 1586325418 +0000

Backend changes for Populating Nameservers(DNS & Static)

- As per the proposed design :
https://lists.ozlabs.org/pipermail/openbmc/2019-September/018399.html

Depends on :
https://gerrit.openbmc-project.xyz/#/c/openbmc/phosphor-dbus-interfaces/+/26060/

The idea of this commit is to

- Support NameServers(Read Only) property to display current
  Nameservers (both DHCP provided& Static) configured on the
  interface.

- Support StaticNameServers(Writable) property by which user
  can set the Nameservers on an interface.

Tested By:

1.Configure a DNS via DHCP Server & Make sure NameServer property
  populates accordingly.
2.With DNS from DHCP existing, set a name server using PATCH on
  StaticNameServer property & make sure both properties populate
  the data as per the proposal.
3.Make sure /etc/resolv.conf is populated with the right content
  in case of DHCP/Static and DHCP & Static (Co-existing)
4.Make sure network configuration file is updated properly when
  user sets a staic name server.

Signed-off-by: Manojkiran Eda <manojkiran.eda@gmail.com>
Change-Id: If10b9aa683d2b50e51780e91323c6d10a5ec3710