interfaces-wireless.py
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interfaces-wireless.py
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	#!/usr/bin/env python3
	#
	# Copyright (C) 2019-2020 VyOS maintainers and contributors
	#
	# This program is free software; you can redistribute it and/or modify
	# it under the terms of the GNU General Public License version 2 or later as
	# published by the Free Software Foundation.
	#
	# This program is distributed in the hope that it will be useful,
	# but WITHOUT ANY WARRANTY; without even the implied warranty of
	# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	# GNU General Public License for more details.
	#
	# You should have received a copy of the GNU General Public License
	# along with this program. If not, see <http://www.gnu.org/licenses/>.

	import os
	from sys import exit
	from re import findall

	from copy import deepcopy

	from netifaces import interfaces
	from netaddr import EUI, mac_unix_expanded

	from vyos.config import Config
	from vyos.configdict import list_diff, intf_to_dict, add_to_dict, interface_default_data
	from vyos.ifconfig import WiFiIf, Section
	from vyos.ifconfig_vlan import apply_all_vlans, verify_vlan_config
	from vyos.template import render
	from vyos.util import chown, call
	from vyos.validate import is_member
	from vyos import ConfigError

	default_config_data = {
	**interface_default_data,
	'cap_ht' : False,
	'cap_ht_40mhz_incapable' : False,
	'cap_ht_powersave' : False,
	'cap_ht_chan_set_width' : '',
	'cap_ht_delayed_block_ack' : False,
	'cap_ht_dsss_cck_40' : False,
	'cap_ht_greenfield' : False,
	'cap_ht_ldpc' : False,
	'cap_ht_lsig_protection' : False,
	'cap_ht_max_amsdu' : '',
	'cap_ht_short_gi' : [],
	'cap_ht_smps' : '',
	'cap_ht_stbc_rx' : '',
	'cap_ht_stbc_tx' : False,
	'cap_req_ht' : False,
	'cap_req_vht' : False,
	'cap_vht' : False,
	'cap_vht_antenna_cnt' : '',
	'cap_vht_antenna_fixed' : False,
	'cap_vht_beamform' : '',
	'cap_vht_center_freq_1' : '',
	'cap_vht_center_freq_2' : '',
	'cap_vht_chan_set_width' : '',
	'cap_vht_ldpc' : False,
	'cap_vht_link_adaptation' : '',
	'cap_vht_max_mpdu_exp' : '',
	'cap_vht_max_mpdu' : '',
	'cap_vht_short_gi' : [],
	'cap_vht_stbc_rx' : '',
	'cap_vht_stbc_tx' : False,
	'cap_vht_tx_powersave' : False,
	'cap_vht_vht_cf' : False,
	'channel': '',
	'country_code': '',
	'deleted': False,
	'disable_broadcast_ssid' : False,
	'disable_link_detect' : 1,
	'expunge_failing_stations' : False,
	'hw_id' : '',
	'intf': '',
	'isolate_stations' : False,
	'max_stations' : '',
	'mgmt_frame_protection' : 'disabled',
	'mode' : 'g',
	'phy' : '',
	'reduce_transmit_power' : '',
	'sec_wep' : False,
	'sec_wep_key' : [],
	'sec_wpa' : False,
	'sec_wpa_cipher' : [],
	'sec_wpa_mode' : 'both',
	'sec_wpa_passphrase' : '',
	'sec_wpa_radius' : [],
	'ssid' : '',
	'op_mode' : 'monitor',
	'vif': {},
	'vif_remove': [],
	'vif_s': {},
	'vif_s_remove': []
	}

	# XXX: wpa_supplicant works on the source interface
	wpa_suppl_conf = '/run/wpa_supplicant/{intf}.conf'
	hostapd_conf = '/run/hostapd/{intf}.conf'

	def get_config():
	# determine tagNode instance
	if 'VYOS_TAGNODE_VALUE' not in os.environ:
	raise ConfigError('Interface (VYOS_TAGNODE_VALUE) not specified')

	ifname = os.environ['VYOS_TAGNODE_VALUE']
	conf = Config()

	# check if wireless interface has been removed
	cfg_base = ['interfaces', 'wireless ', ifname]
	if not conf.exists(cfg_base):
	wifi = deepcopy(default_config_data)
	wifi['intf'] = ifname
	wifi['deleted'] = True
	# we need to know if we're a bridge member so we can refuse deletion
	wifi['is_bridge_member'] = is_member(conf, wifi['intf'], 'bridge')
	# we can not bail out early as wireless interface can not be removed
	# Kernel will complain with: RTNETLINK answers: Operation not supported.
	# Thus we need to remove individual settings
	return wifi

	# set new configuration level
	conf.set_level(cfg_base)

	# get common interface settings
	wifi, disabled = intf_to_dict(conf, default_config_data)

	# 40MHz intolerance, use 20MHz only
	if conf.exists('capabilities ht 40mhz-incapable'):
	wifi['cap_ht'] = True
	wifi['cap_ht_40mhz_incapable'] = True

	# WMM-PS Unscheduled Automatic Power Save Delivery [U-APSD]
	if conf.exists('capabilities ht auto-powersave'):
	wifi['cap_ht'] = True
	wifi['cap_ht_powersave'] = True

	# Supported channel set width
	if conf.exists('capabilities ht channel-set-width'):
	wifi['cap_ht'] = True
	wifi['cap_ht_chan_set_width'] = conf.return_values('capabilities ht channel-set-width')

	# HT-delayed Block Ack
	if conf.exists('capabilities ht delayed-block-ack'):
	wifi['cap_ht'] = True
	wifi['cap_ht_delayed_block_ack'] = True

	# DSSS/CCK Mode in 40 MHz
	if conf.exists('capabilities ht dsss-cck-40'):
	wifi['cap_ht'] = True
	wifi['cap_ht_dsss_cck_40'] = True

	# HT-greenfield capability
	if conf.exists('capabilities ht greenfield'):
	wifi['cap_ht'] = True
	wifi['cap_ht_greenfield'] = True

	# LDPC coding capability
	if conf.exists('capabilities ht ldpc'):
	wifi['cap_ht'] = True
	wifi['cap_ht_ldpc'] = True

	# L-SIG TXOP protection capability
	if conf.exists('capabilities ht lsig-protection'):
	wifi['cap_ht'] = True
	wifi['cap_ht_lsig_protection'] = True

	# Set Maximum A-MSDU length
	if conf.exists('capabilities ht max-amsdu'):
	wifi['cap_ht'] = True
	wifi['cap_ht_max_amsdu'] = conf.return_value('capabilities ht max-amsdu')

	# Short GI capabilities
	if conf.exists('capabilities ht short-gi'):
	wifi['cap_ht'] = True
	wifi['cap_ht_short_gi'] = conf.return_values('capabilities ht short-gi')

	# Spatial Multiplexing Power Save (SMPS) settings
	if conf.exists('capabilities ht smps'):
	wifi['cap_ht'] = True
	wifi['cap_ht_smps'] = conf.return_value('capabilities ht smps')

	# Support for receiving PPDU using STBC (Space Time Block Coding)
	if conf.exists('capabilities ht stbc rx'):
	wifi['cap_ht'] = True
	wifi['cap_ht_stbc_rx'] = conf.return_value('capabilities ht stbc rx')

	# Support for sending PPDU using STBC (Space Time Block Coding)
	if conf.exists('capabilities ht stbc tx'):
	wifi['cap_ht'] = True
	wifi['cap_ht_stbc_tx'] = True

	# Require stations to support HT PHY (reject association if they do not)
	if conf.exists('capabilities require-ht'):
	wifi['cap_req_ht'] = True

	# Require stations to support VHT PHY (reject association if they do not)
	if conf.exists('capabilities require-vht'):
	wifi['cap_req_vht'] = True

	# Number of antennas on this card
	if conf.exists('capabilities vht antenna-count'):
	wifi['cap_vht'] = True
	wifi['cap_vht_antenna_cnt'] = conf.return_value('capabilities vht antenna-count')

	# set if antenna pattern does not change during the lifetime of an association
	if conf.exists('capabilities vht antenna-pattern-fixed'):
	wifi['cap_vht'] = True
	wifi['cap_vht_antenna_fixed'] = True

	# Beamforming capabilities
	if conf.exists('capabilities vht beamform'):
	wifi['cap_vht'] = True
	wifi['cap_vht_beamform'] = conf.return_values('capabilities vht beamform')

	# VHT operating channel center frequency - center freq 1 (for use with 80, 80+80 and 160 modes)
	if conf.exists('capabilities vht center-channel-freq freq-1'):
	wifi['cap_vht'] = True
	wifi['cap_vht_center_freq_1'] = conf.return_value('capabilities vht center-channel-freq freq-1')

	# VHT operating channel center frequency - center freq 2 (for use with the 80+80 mode)
	if conf.exists('capabilities vht center-channel-freq freq-2'):
	wifi['cap_vht'] = True
	wifi['cap_vht_center_freq_2'] = conf.return_value('capabilities vht center-channel-freq freq-2')

	# VHT operating Channel width
	if conf.exists('capabilities vht channel-set-width'):
	wifi['cap_vht'] = True
	wifi['cap_vht_chan_set_width'] = conf.return_value('capabilities vht channel-set-width')

	# LDPC coding capability
	if conf.exists('capabilities vht ldpc'):
	wifi['cap_vht'] = True
	wifi['cap_vht_ldpc'] = True

	# VHT link adaptation capabilities
	if conf.exists('capabilities vht link-adaptation'):
	wifi['cap_vht'] = True
	wifi['cap_vht_link_adaptation'] = conf.return_value('capabilities vht link-adaptation')

	# Set the maximum length of A-MPDU pre-EOF padding that the station can receive
	if conf.exists('capabilities vht max-mpdu-exp'):
	wifi['cap_vht'] = True
	wifi['cap_vht_max_mpdu_exp'] = conf.return_value('capabilities vht max-mpdu-exp')

	# Increase Maximum MPDU length
	if conf.exists('capabilities vht max-mpdu'):
	wifi['cap_vht'] = True
	wifi['cap_vht_max_mpdu'] = conf.return_value('capabilities vht max-mpdu')

	# Increase Maximum MPDU length
	if conf.exists('capabilities vht short-gi'):
	wifi['cap_vht'] = True
	wifi['cap_vht_short_gi'] = conf.return_values('capabilities vht short-gi')

	# Support for receiving PPDU using STBC (Space Time Block Coding)
	if conf.exists('capabilities vht stbc rx'):
	wifi['cap_vht'] = True
	wifi['cap_vht_stbc_rx'] = conf.return_value('capabilities vht stbc rx')

	# Support for the transmission of at least 2x1 STBC (Space Time Block Coding)
	if conf.exists('capabilities vht stbc tx'):
	wifi['cap_vht'] = True
	wifi['cap_vht_stbc_tx'] = True

	# Support for VHT TXOP Power Save Mode
	if conf.exists('capabilities vht tx-powersave'):
	wifi['cap_vht'] = True
	wifi['cap_vht_tx_powersave'] = True

	# STA supports receiving a VHT variant HT Control field
	if conf.exists('capabilities vht vht-cf'):
	wifi['cap_vht'] = True
	wifi['cap_vht_vht_cf'] = True

	# Wireless radio channel
	if conf.exists('channel'):
	wifi['channel'] = conf.return_value('channel')

	# Disable broadcast of SSID from access-point
	if conf.exists('disable-broadcast-ssid'):
	wifi['disable_broadcast_ssid'] = True

	# Disassociate stations based on excessive transmission failures
	if conf.exists('expunge-failing-stations'):
	wifi['expunge_failing_stations'] = True

	# retrieve real hardware address
	if conf.exists('hw-id'):
	wifi['hw_id'] = conf.return_value('hw-id')

	# Isolate stations on the AP so they cannot see each other
	if conf.exists('isolate-stations'):
	wifi['isolate_stations'] = True

	# Wireless physical device
	if conf.exists('physical-device'):
	wifi['phy'] = conf.return_value('physical-device')

	# Maximum number of wireless radio stations
	if conf.exists('max-stations'):
	wifi['max_stations'] = conf.return_value('max-stations')

	# Management Frame Protection (MFP) according to IEEE 802.11w
	if conf.exists('mgmt-frame-protection'):
	wifi['mgmt_frame_protection'] = conf.return_value('mgmt-frame-protection')

	# Wireless radio mode
	if conf.exists('mode'):
	wifi['mode'] = conf.return_value('mode')

	# Transmission power reduction in dBm
	if conf.exists('reduce-transmit-power'):
	wifi['reduce_transmit_power'] = conf.return_value('reduce-transmit-power')

	# WEP enabled?
	if conf.exists('security wep'):
	wifi['sec_wep'] = True

	# WEP encryption key(s)
	if conf.exists('security wep key'):
	wifi['sec_wep_key'] = conf.return_values('security wep key')

	# WPA enabled?
	if conf.exists('security wpa'):
	wifi['sec_wpa'] = True

	# WPA Cipher suite
	if conf.exists('security wpa cipher'):
	wifi['sec_wpa_cipher'] = conf.return_values('security wpa cipher')

	# WPA mode
	if conf.exists('security wpa mode'):
	wifi['sec_wpa_mode'] = conf.return_value('security wpa mode')

	# WPA default ciphers depend on WPA mode
	if not wifi['sec_wpa_cipher']:
	if wifi['sec_wpa_mode'] == 'wpa':
	wifi['sec_wpa_cipher'].append('TKIP')
	wifi['sec_wpa_cipher'].append('CCMP')

	elif wifi['sec_wpa_mode'] == 'wpa2':
	wifi['sec_wpa_cipher'].append('CCMP')

	elif wifi['sec_wpa_mode'] == 'both':
	wifi['sec_wpa_cipher'].append('CCMP')
	wifi['sec_wpa_cipher'].append('TKIP')

	# WPA Group Cipher suite
	if conf.exists('security wpa group-cipher'):
	wifi['sec_wpa_group_cipher'] = conf.return_values('security wpa group-cipher')

	# WPA personal shared pass phrase
	if conf.exists('security wpa passphrase'):
	wifi['sec_wpa_passphrase'] = conf.return_value('security wpa passphrase')

	# WPA RADIUS source address
	if conf.exists('security wpa radius source-address'):
	wifi['sec_wpa_radius_source'] = conf.return_value('security wpa radius source-address')

	# WPA RADIUS server
	for server in conf.list_nodes('security wpa radius server'):
	# set new configuration level
	conf.set_level(cfg_base + ' security wpa radius server ' + server)
	radius = {
	'server' : server,
	'acc_port' : '',
	'disabled': False,
	'port' : 1812,
	'key' : ''
	}

	# RADIUS server port
	if conf.exists('port'):
	radius['port'] = int(conf.return_value('port'))

	# receive RADIUS accounting info
	if conf.exists('accounting'):
	radius['acc_port'] = radius['port'] + 1

	# Check if RADIUS server was temporary disabled
	if conf.exists(['disable']):
	radius['disabled'] = True

	# RADIUS server shared-secret
	if conf.exists('key'):
	radius['key'] = conf.return_value('key')

	# append RADIUS server to list of servers
	wifi['sec_wpa_radius'].append(radius)

	# re-set configuration level to parse new nodes
	conf.set_level(cfg_base)

	# Wireless access-point service set identifier (SSID)
	if conf.exists('ssid'):
	wifi['ssid'] = conf.return_value('ssid')

	# Wireless device type for this interface
	if conf.exists('type'):
	tmp = conf.return_value('type')
	if tmp == 'access-point':
	tmp = 'ap'

	wifi['op_mode'] = tmp

	# retrieve configured regulatory domain
	conf.set_level('system')
	if conf.exists('wifi-regulatory-domain'):
	wifi['country_code'] = conf.return_value('wifi-regulatory-domain')

	return wifi


	def verify(wifi):
	if wifi['deleted']:
	if wifi['is_bridge_member']:
	raise ConfigError((
	f'Cannot delete interface "{wifi["intf"]}" as it is a '
	f'member of bridge "{wifi["is_bridge_member"]}"!'))

	return None

	if wifi['op_mode'] != 'monitor' and not wifi['ssid']:
	raise ConfigError('SSID must be set for {}'.format(wifi['intf']))

	if not wifi['phy']:
	raise ConfigError('You must specify physical-device')

	if not wifi['mode']:
	raise ConfigError('You must specify a WiFi mode')

	if wifi['op_mode'] == 'ap':
	c = Config()
	if not c.exists('system wifi-regulatory-domain'):
	raise ConfigError('Wireless regulatory domain is mandatory,\n' \
	'use "set system wifi-regulatory-domain".')

	if not wifi['channel']:
	raise ConfigError('Channel must be set for {}'.format(wifi['intf']))

	if len(wifi['sec_wep_key']) > 4:
	raise ConfigError('No more then 4 WEP keys configurable')

	if wifi['cap_vht'] and not wifi['cap_ht']:
	raise ConfigError('Specify HT flags if you want to use VHT!')

	if wifi['cap_vht_beamform'] and wifi['cap_vht_antenna_cnt'] == 1:
	raise ConfigError('Cannot use beam forming with just one antenna!')

	if wifi['cap_vht_beamform'] == 'single-user-beamformer' and wifi['cap_vht_antenna_cnt'] < 3:
	# Nasty Gotcha: see https://w1.fi/cgit/hostap/plain/hostapd/hostapd.conf lines 692-705
	raise ConfigError('Single-user beam former requires at least 3 antennas!')

	if wifi['sec_wep'] and (len(wifi['sec_wep_key']) == 0):
	raise ConfigError('Missing WEP keys')

	if wifi['sec_wpa'] and not (wifi['sec_wpa_passphrase'] or wifi['sec_wpa_radius']):
	raise ConfigError('Misssing WPA key or RADIUS server')

	for radius in wifi['sec_wpa_radius']:
	if not radius['key']:
	raise ConfigError('Misssing RADIUS shared secret key for server: {}'.format(radius['server']))

	if ( wifi['is_bridge_member']
	and ( wifi['address']
	or wifi['ipv6_eui64_prefix']
	or wifi['ipv6_autoconf'] ) ):
	raise ConfigError((
	f'Cannot assign address to interface "{wifi["intf"]}" '
	f'as it is a member of bridge "{wifi["is_bridge_member"]}"!'))

	if wifi['vrf']:
	if wifi['vrf'] not in interfaces():
	raise ConfigError(f'VRF "{wifi["vrf"]}" does not exist')

	if wifi['is_bridge_member']:
	raise ConfigError((
	f'Interface "{wifi["intf"]}" cannot be member of VRF '
	f'"{wifi["vrf"]}" and bridge {wifi["is_bridge_member"]} '
	f'at the same time!'))

	# use common function to verify VLAN configuration
	verify_vlan_config(wifi)

	conf = Config()
	# Only one wireless interface per phy can be in station mode
	base = ['interfaces', 'wireless']
	for phy in os.listdir('/sys/class/ieee80211'):
	stations = []
	for wlan in conf.list_nodes(base):
	# the following node is mandatory
	if conf.exists(base + [wlan, 'physical-device', phy]):
	tmp = conf.return_value(base + [wlan, 'type'])
	if tmp == 'station':
	stations.append(wlan)

	if len(stations) > 1:
	raise ConfigError('Only one station per wireless physical interface possible!')

	return None

	def generate(wifi):
	interface = wifi['intf']

	# always stop hostapd service first before reconfiguring it
	call(f'systemctl stop hostapd@{interface}.service')
	# always stop wpa_supplicant service first before reconfiguring it
	call(f'systemctl stop wpa_supplicant@{interface}.service')

	# Delete config files if interface is removed
	if wifi['deleted']:
	if os.path.isfile(hostapd_conf.format(**wifi)):
	os.unlink(hostapd_conf.format(**wifi))

	if os.path.isfile(wpa_suppl_conf.format(**wifi)):
	os.unlink(wpa_suppl_conf.format(**wifi))

	return None

	if not wifi['mac']:
	# http://wiki.stocksy.co.uk/wiki/Multiple_SSIDs_with_hostapd
	# generate locally administered MAC address from used phy interface
	with open('/sys/class/ieee80211/{}/addresses'.format(wifi['phy']), 'r') as f:
	# some PHYs tend to have multiple interfaces and thus supply multiple MAC
	# addresses - we only need the first one for our calculation
	tmp = f.readline().rstrip()
	tmp = EUI(tmp).value
	# mask last nibble from the MAC address
	tmp &= 0xfffffffffff0
	# set locally administered bit in MAC address
	tmp \|= 0x020000000000
	# we now need to add an offset to our MAC address indicating this
	# subinterfaces index
	tmp += int(findall(r'\d+', interface)[0])

	# convert integer to "real" MAC address representation
	mac = EUI(hex(tmp).split('x')[-1])
	# change dialect to use : as delimiter instead of -
	mac.dialect = mac_unix_expanded
	wifi['mac'] = str(mac)

	# render appropriate new config files depending on access-point or station mode
	if wifi['op_mode'] == 'ap':
	render(hostapd_conf.format(**wifi), 'wifi/hostapd.conf.tmpl', wifi)

	elif wifi['op_mode'] == 'station':
	render(wpa_suppl_conf.format(**wifi), 'wifi/wpa_supplicant.conf.tmpl', wifi)

	return None

	def apply(wifi):
	interface = wifi['intf']
	if wifi['deleted']:
	w = WiFiIf(interface)
	# delete interface
	w.remove()
	else:
	# WiFi interface needs to be created on-block (e.g. mode or physical
	# interface) instead of passing a ton of arguments, I just use a dict
	# that is managed by vyos.ifconfig
	conf = deepcopy(WiFiIf.get_config())

	# Assign WiFi instance configuration parameters to config dict
	conf['phy'] = wifi['phy']

	# Finally create the new interface
	w = WiFiIf(interface, **conf)

	# assign/remove VRF (ONLY when not a member of a bridge,
	# otherwise 'nomaster' removes it from it)
	if not wifi['is_bridge_member']:
	w.set_vrf(wifi['vrf'])

	# update interface description used e.g. within SNMP
	w.set_alias(wifi['description'])

	if wifi['dhcp_client_id']:
	w.dhcp.v4.options['client_id'] = wifi['dhcp_client_id']

	if wifi['dhcp_hostname']:
	w.dhcp.v4.options['hostname'] = wifi['dhcp_hostname']

	if wifi['dhcp_vendor_class_id']:
	w.dhcp.v4.options['vendor_class_id'] = wifi['dhcp_vendor_class_id']

	if wifi['dhcpv6_prm_only']:
	w.dhcp.v6.options['dhcpv6_prm_only'] = True

	if wifi['dhcpv6_temporary']:
	w.dhcp.v6.options['dhcpv6_temporary'] = True

	if wifi['dhcpv6_pd']:
	w.dhcp.v6.options['dhcpv6_pd'] = wifi['dhcpv6_pd']

	# ignore link state changes
	w.set_link_detect(wifi['disable_link_detect'])

	# Delete old IPv6 EUI64 addresses before changing MAC
	for addr in wifi['ipv6_eui64_prefix_remove']:
	w.del_ipv6_eui64_address(addr)

	# Change interface MAC address - re-set to real hardware address (hw-id)
	# if custom mac is removed
	if wifi['mac']:
	w.set_mac(wifi['mac'])
	elif wifi['hw_id']:
	w.set_mac(wifi['hw_id'])

	# Add IPv6 EUI-based addresses
	for addr in wifi['ipv6_eui64_prefix']:
	w.add_ipv6_eui64_address(addr)

	# configure ARP filter configuration
	w.set_arp_filter(wifi['ip_disable_arp_filter'])
	# configure ARP accept
	w.set_arp_accept(wifi['ip_enable_arp_accept'])
	# configure ARP announce
	w.set_arp_announce(wifi['ip_enable_arp_announce'])
	# configure ARP ignore
	w.set_arp_ignore(wifi['ip_enable_arp_ignore'])
	# IPv6 accept RA
	w.set_ipv6_accept_ra(wifi['ipv6_accept_ra'])
	# IPv6 address autoconfiguration
	w.set_ipv6_autoconf(wifi['ipv6_autoconf'])
	# IPv6 forwarding
	w.set_ipv6_forwarding(wifi['ipv6_forwarding'])
	# IPv6 Duplicate Address Detection (DAD) tries
	w.set_ipv6_dad_messages(wifi['ipv6_dup_addr_detect'])

	# Configure interface address(es)
	# - not longer required addresses get removed first
	# - newly addresses will be added second
	for addr in wifi['address_remove']:
	w.del_addr(addr)
	for addr in wifi['address']:
	w.add_addr(addr)

	# apply all vlans to interface
	apply_all_vlans(w, wifi)

	# Enable/Disable interface - interface is always placed in
	# administrative down state in WiFiIf class
	if not wifi['disable']:
	w.set_admin_state('up')

	# Physical interface is now configured. Proceed by starting hostapd or
	# wpa_supplicant daemon. When type is monitor we can just skip this.
	if wifi['op_mode'] == 'ap':
	call(f'systemctl start hostapd@{interface}.service')

	elif wifi['op_mode'] == 'station':
	call(f'systemctl start wpa_supplicant@{interface}.service')

	return None

	if __name__ == '__main__':
	try:
	c = get_config()
	verify(c)
	generate(c)
	apply(c)
	except ConfigError as e:
	print(e)
	exit(1)

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