salt/modules/win_dns_client.py
# -*- coding: utf-8 -*-
'''
Module for configuring DNS Client on Windows systems
'''
from __future__ import absolute_import, unicode_literals, print_function
# Import Python libs
import logging
# Import Salt libs
import salt.utils.platform
try:
import wmi
except ImportError:
pass
log = logging.getLogger(__name__)
def __virtual__():
'''
Only works on Windows systems
'''
if salt.utils.platform.is_windows():
return 'win_dns_client'
return (False, "Module win_dns_client: module only works on Windows systems")
def get_dns_servers(interface='Local Area Connection'):
'''
Return a list of the configured DNS servers of the specified interface
CLI Example:
.. code-block:: bash
salt '*' win_dns_client.get_dns_servers 'Local Area Connection'
'''
# remove any escape characters
interface = interface.split('\\')
interface = ''.join(interface)
with salt.utils.winapi.Com():
c = wmi.WMI()
for iface in c.Win32_NetworkAdapter(NetEnabled=True):
if interface == iface.NetConnectionID:
iface_config = c.Win32_NetworkAdapterConfiguration(Index=iface.Index).pop()
try:
return list(iface_config.DNSServerSearchOrder)
except TypeError:
return []
log.debug('Interface "%s" not found', interface)
return False
def rm_dns(ip, interface='Local Area Connection'):
'''
Remove the DNS server from the network interface
CLI Example:
.. code-block:: bash
salt '*' win_dns_client.rm_dns <ip> <interface>
'''
cmd = ['netsh', 'interface', 'ip', 'delete', 'dns', interface, ip, 'validate=no']
return __salt__['cmd.retcode'](cmd, python_shell=False) == 0
def add_dns(ip, interface='Local Area Connection', index=1):
'''
Add the DNS server to the network interface
(index starts from 1)
Note: if the interface DNS is configured by DHCP, all the DNS servers will
be removed from the interface and the requested DNS will be the only one
CLI Example:
.. code-block:: bash
salt '*' win_dns_client.add_dns <ip> <interface> <index>
'''
servers = get_dns_servers(interface)
# Return False if could not find the interface
if servers is False:
return False
# Return true if configured
try:
if servers[index - 1] == ip:
return True
except IndexError:
pass
# If configured in the wrong order delete it
if ip in servers:
rm_dns(ip, interface)
cmd = ['netsh', 'interface', 'ip', 'add', 'dns',
interface, ip, 'index={0}'.format(index), 'validate=no']
return __salt__['cmd.retcode'](cmd, python_shell=False) == 0
def dns_dhcp(interface='Local Area Connection'):
'''
Configure the interface to get its DNS servers from the DHCP server
CLI Example:
.. code-block:: bash
salt '*' win_dns_client.dns_dhcp <interface>
'''
cmd = ['netsh', 'interface', 'ip', 'set', 'dns', interface, 'source=dhcp']
return __salt__['cmd.retcode'](cmd, python_shell=False) == 0
def get_dns_config(interface='Local Area Connection'):
'''
Get the type of DNS configuration (dhcp / static)
CLI Example:
.. code-block:: bash
salt '*' win_dns_client.get_dns_config 'Local Area Connection'
'''
# remove any escape characters
interface = interface.split('\\')
interface = ''.join(interface)
with salt.utils.winapi.Com():
c = wmi.WMI()
for iface in c.Win32_NetworkAdapterConfiguration(IPEnabled=1):
if interface == iface.Description:
return iface.DHCPEnabled