Tryag File Manager - Edit By Mr.SaHr

//lib64/python2.7/site-packages/pyanaconda/nm.py

# Network configuration proxy to NetworkManager
#
# Copyright (C) 2013  Red Hat, Inc.
#
# This copyrighted material is made available to anyone wishing to use,
# modify, copy, or redistribute it subject to the terms and conditions of
# the GNU General Public License v.2, or (at your option) any later version.
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY expressed or implied, including the implied warranties 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, write to the
# Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
# 02110-1301, USA.  Any Red Hat trademarks that are incorporated in the
# source code or documentation are not subject to the GNU General Public
# License and may only be used or replicated with the express permission of
# Red Hat, Inc.
#
# Red Hat Author(s): Radek Vykydal <rvykydal@redhat.com>
#

import gi
gi.require_version("GLib", "2.0")
gi.require_version("Gio", "2.0")
gi.require_version("NM", "1.0")
gi.require_version("NetworkManager", "1.0")

from gi.repository import Gio, GLib
from gi.repository import NetworkManager
# Register the types so that the use in threads is safe
NetworkManager.ActiveConnectionState # pylint: disable=pointless-statement
NetworkManager.DeviceState # pylint: disable=pointless-statement
NetworkManager.DeviceType # pylint: disable=pointless-statement
NetworkManager.State # pylint: disable=pointless-statement

import IPy
import struct
import socket
import re
import logging
log = logging.getLogger("anaconda")

from pyanaconda.constants import DEFAULT_DBUS_TIMEOUT
from pyanaconda.flags import flags, can_touch_runtime_system

supported_device_types = [
    NetworkManager.DeviceType.ETHERNET,
    NetworkManager.DeviceType.WIFI,
    NetworkManager.DeviceType.INFINIBAND,
    NetworkManager.DeviceType.BOND,
    NetworkManager.DeviceType.VLAN,
    NetworkManager.DeviceType.BRIDGE,
    NetworkManager.DeviceType.TEAM,
]

class UnknownDeviceError(ValueError):
    """Device of specified name was not found by NM"""
    def __str__(self):
        return self.__repr__()

class UnmanagedDeviceError(Exception):
    """Device of specified name is not managed by NM or unavailable"""
    def __str__(self):
        return self.__repr__()

class DeviceNotActiveError(Exception):
    """Device of specified name is not active"""
    def __str__(self):
        return self.__repr__()

class PropertyNotFoundError(ValueError):
    """Property of NM object was not found"""
    def __str__(self):
        return self.__repr__()

class SettingsNotFoundError(ValueError):
    """Settings NMRemoteConnection object was not found"""
    def __str__(self):
        return self.__repr__()

class MultipleSettingsFoundError(ValueError):
    """Too many NMRemoteConnection objects were found"""
    def __str__(self):
        return self.__repr__()

class UnknownMethodGetError(Exception):
    """Object does not have Get, most probably being invalid"""
    def __str__(self):
        return self.__repr__()

# bug #1062417 e.g. for ethernet device without link
class UnknownConnectionError(Exception):
    """Connection is not available for the device"""
    def __str__(self):
        return self.__repr__()

class AddConnectionError(Exception):
    """Connection is not available for the device"""
    def __str__(self):
        return self.__repr__()

# bug #1039006
class BondOptionsError(AddConnectionError):
    pass

def _get_proxy(bus_type=Gio.BusType.SYSTEM,
               proxy_flags=Gio.DBusProxyFlags.NONE,
               info=None,
               name="org.freedesktop.NetworkManager",
               object_path="/org/freedesktop/NetworkManager",
               interface_name="org.freedesktop.NetworkManager",
               cancellable=None):
    try:
        proxy = Gio.DBusProxy.new_for_bus_sync(bus_type,
                                               proxy_flags,
                                               info,
                                               name,
                                               object_path,
                                               interface_name,
                                               cancellable)
    except GLib.GError as e:
        if can_touch_runtime_system("raise GLib.GError", touch_live=True):
            raise

log.error("_get_proxy failed: %s", e)
        proxy = None

return proxy

def _get_property(object_path, prop, interface_name_suffix=""):
    interface_name = "org.freedesktop.NetworkManager" + interface_name_suffix
    proxy = _get_proxy(object_path=object_path, interface_name="org.freedesktop.DBus.Properties")
    if not proxy:
        return None

try:
        prop = proxy.Get('(ss)', interface_name, prop)
    except GLib.GError as e:
        # pylint: disable=unsupported-membership-test
        if ("org.freedesktop.DBus.Error.AccessDenied" in e.message or
            "org.freedesktop.DBus.Error.InvalidArgs" in e.message):
            return None
        # pylint: disable=unsupported-membership-test
        elif "org.freedesktop.DBus.Error.UnknownMethod" in e.message:
            raise UnknownMethodGetError
        else:
            raise

return prop

def nm_state():
    """Return state of NetworkManager

:return: state of NetworkManager
    :rtype: integer
    """
    prop = _get_property("/org/freedesktop/NetworkManager", "State")

# If this is an image/dir install assume the network is up
    if not prop and (flags.imageInstall or flags.dirInstall):
        return NetworkManager.State.CONNECTED_GLOBAL
    else:
        return prop

# FIXME - use just GLOBAL? There is some connectivity checking
# for GLOBAL in NM (nm_connectivity_get_connected), not sure if
# and how it is implemented.
# Also see Gio g_network_monitor_can_reach.
def nm_is_connected():
    """Is NetworkManager connected?

:return: True if NM is connected, False otherwise.
    :rtype: bool
    """
    return nm_state() in (NetworkManager.State.CONNECTED_GLOBAL,
                          NetworkManager.State.CONNECTED_SITE,
                          NetworkManager.State.CONNECTED_LOCAL)

def nm_is_connecting():
    """Is NetworkManager connecting?

:return: True if NM is in CONNECTING state, False otherwise.
    :rtype: bool
    """
    return nm_state() == NetworkManager.State.CONNECTING

def nm_devices():
    """Return names of network devices supported in installer.

:return: names of network devices supported in installer
    :rtype: list of strings
    """

interfaces = []

proxy = _get_proxy()
    if not proxy:
        return []

devices = proxy.GetDevices()
    for device in devices:
        device_type = _get_property(device, "DeviceType", ".Device")
        if device_type not in supported_device_types:
            continue
        iface = _get_property(device, "Interface", ".Device")
        interfaces.append(iface)

return interfaces

def nm_activated_devices():
    """Return names of activated network devices.

:return: names of activated network devices
    :rtype: list of strings
    """

interfaces = []

active_connections = _get_property("/org/freedesktop/NetworkManager", "ActiveConnections")
    if not active_connections:
        return []

for ac in active_connections:
        try:
            state = _get_property(ac, "State", ".Connection.Active")
        except UnknownMethodGetError:
            continue
        if state != NetworkManager.ActiveConnectionState.ACTIVATED:
            continue
        devices = _get_property(ac, "Devices", ".Connection.Active")
        for device in devices:
            iface = _get_property(device, "IpInterface", ".Device")
            if not iface:
                iface = _get_property(device, "Interface", ".Device")
            interfaces.append(iface)

return interfaces

def _get_object_iface_names(object_path):
    connection = Gio.bus_get_sync(Gio.BusType.SYSTEM, None)
    res_xml = connection.call_sync("org.freedesktop.NetworkManager",
                                   object_path,
                                   "org.freedesktop.DBus.Introspectable",
                                   "Introspect",
                                   None,
                                   GLib.VariantType.new("(s)"),
                                   Gio.DBusCallFlags.NONE,
                                   -1,
                                   None)
    node_info = Gio.DBusNodeInfo.new_for_xml(res_xml[0])
    return [iface.name for iface in node_info.interfaces]

def _device_type_specific_interface(device):
    ifaces = _get_object_iface_names(device)
    for iface in ifaces:
        if iface.startswith("org.freedesktop.NetworkManager.Device.") \
           and iface != "org.freedesktop.NetworkManager.Device.Statistics":
            return iface
    return None

def nm_device_property(name, prop):
    """Return value of device NM property

:param name: name of device
       :type name: str
       :param prop: property
       :type name: str
       :return: value of device's property
       :rtype: unpacked GDBus value
       :raise UnknownDeviceError: if device is not found
       :raise PropertyNotFoundError: if property is not found
    """

retval = None

proxy = _get_proxy()
    try:
        device = proxy.GetDeviceByIpIface('(s)', name)
    except GLib.GError as e:
        # pylint: disable=unsupported-membership-test
        if "org.freedesktop.NetworkManager.UnknownDevice" in e.message:
            raise UnknownDeviceError(name, e)
        raise

retval = _get_property(device, prop, ".Device")
    if not retval:
        # Look in device type based interface
        interface = _device_type_specific_interface(device)
        if interface:
            retval = _get_property(device, prop, interface[30:])
            if not retval:
                raise PropertyNotFoundError(prop)
        else:
            raise PropertyNotFoundError(prop)

return retval

def nm_device_type_is_wifi(name):
    """Is the type of device wifi?

:param name: name of device
       :type name: str
       :return: True if type of device is WIFI, False otherwise
       :rtype: bool
       :raise UnknownDeviceError: if device is not found
       :raise PropertyNotFoundError: if property is not found
    """
    return nm_device_type(name) == NetworkManager.DeviceType.WIFI

def nm_device_type_is_ethernet(name):
    """Is the type of device ethernet?

:param name: name of device
       :type name: str
       :return: True if type of device is ETHERNET, False otherwise
       :rtype: bool
       :raise UnknownDeviceError: if device is not found
       :raise PropertyNotFoundError: if property is not found
    """
    return nm_device_type(name) == NetworkManager.DeviceType.ETHERNET

def nm_device_type_is_infiniband(name):
    """Is the type of device infiniband?

Exceptions:
       UnknownDeviceError if device is not found
       PropertyNotFoundError if type is not found
    """
    return nm_device_type(name) == NetworkManager.DeviceType.INFINIBAND

def nm_device_type_is_bond(name):
    """Is the type of device bond?

:param name: name of device
       :type name: str
       :return: True if type of device is BOND, False otherwise
       :rtype: bool
       :raise UnknownDeviceError: if device is not found
       :raise PropertyNotFoundError: if property is not found
    """
    return nm_device_type(name) == NetworkManager.DeviceType.BOND

def nm_device_type_is_team(name):
    """Is the type of device team?

:param name: name of device
       :type name: str
       :return: True if type of device is TEAM, False otherwise
       :rtype: bool
       :raise UnknownDeviceError: if device is not found
       :raise PropertyNotFoundError: if property is not found
    """
    return nm_device_type(name) == NetworkManager.DeviceType.TEAM

def nm_device_type_is_bridge(name):
    """Is the type of device bridge?

:param name: name of device
       :type name: str
       :return: True if type of device is BRIDGE, False otherwise
       :rtype: bool
       :raise UnknownDeviceError: if device is not found
       :raise PropertyNotFoundError: if property is not found
    """
    return nm_device_type(name) == NetworkManager.DeviceType.BRIDGE

def nm_device_type_is_vlan(name):
    """Is the type of device vlan?

:param name: name of device
       :type name: str
       :return: True if type of device is VLAN, False otherwise
       :rtype: bool
       :raise UnknownDeviceError: if device is not found
       :raise PropertyNotFoundError: if property is not found
    """
    return nm_device_type(name) == NetworkManager.DeviceType.VLAN

def nm_device_is_slave(name):
    """Is the device a slave?

Exceptions:
       UnknownDeviceError if device is not found
    """
    active_con = nm_device_property(name, 'ActiveConnection')
    if active_con == "/":
        return False

try:
        master = _get_property(active_con, "Master", ".Connection.Active")
    except UnknownMethodGetError:
        # don't crash on obsolete ActiveConnection objects
        return False

return master and master != "/"

def nm_device_hwaddress(name):
    """Return active hardware address of device ('HwAddress' property)

:param name: name of device
       :type name: str
       :return: active hardware address of device ('HwAddress' property)
       :rtype: str
       :raise UnknownDeviceError: if device is not found
       :raise PropertyNotFoundError: if 'HwAddress' property is not found
    """
    return nm_device_property(name, "HwAddress")

def nm_device_perm_hwaddress(name):
    """Return active hardware address of device ('PermHwAddress' property)

:param name: name of device
       :type name: str
       :return: active hardware address of device ('PermHwAddress' property)
       :rtype: str
       :raise UnknownDeviceError: if device is not found
       :raise PropertyNotFoundError: if 'PermHwAddress' property is not found
    """
    return nm_device_property(name, "PermHwAddress")

def nm_device_valid_hwaddress(name):
    """Return valid hardware address of device depending on type of the device
       ('PermHwAddress' property for wired and wireless or 'HwAddress' property for others)

:param name: name of device
       :type name: str
       :return: active hardware address of device
                ('HwAddress' or 'PermHwAddress' property)
       :rtype: str
       :raise UnknownDeviceError: if device is not found
       :raise PropertyNotFoundError: if property is not found
    """
    if nm_device_type_is_ethernet(name) or nm_device_type_is_wifi(name):
        try:
            return nm_device_perm_hwaddress(name)
        except PropertyNotFoundError:
            # TODO: Remove this if everything will work well
            # fallback solution
            log.warning("Device %s don't have property PermHwAddress", name)
            return nm_device_hwaddress(name)
    else:
        return nm_device_hwaddress(name)

def nm_device_active_con_uuid(name):
    """Return uuid of device's active connection

Exceptions:
       UnknownDeviceError if device is not found
    """
    active_con = nm_device_property(name, 'ActiveConnection')
    if active_con == "/":
        return None

uuid = _get_property(active_con, "Uuid", ".Connection.Active")
    return uuid

def nm_device_type(name):
    """Return device's type ('DeviceType' property).

:param name: name of device
       :type name: str
       :return: device type
       :rtype: integer
       :raise UnknownDeviceError: if device is not found
       :raise PropertyNotFoundError: if 'DeviceType' property is not found
    """
    return nm_device_property(name, "DeviceType")

def nm_device_carrier(name):
    """Return whether physical carrier of device is found.
       ('Carrier' property)

:param name: name of device
       :type name: str
       :return: True if physical carrier is found, False otherwise
       :rtype: bool
       :raise UnknownDeviceError: if device is not found
       :raise PropertyNotFoundError: if 'Carrier' property is not found
    """
    return nm_device_property(name, "Carrier")

def nm_device_ip_addresses(name, version=4):
    """Return IP addresses of device in ACTIVATED state.

:param name: name of device
       :type name: str
       :param version: version of IP protocol (value 4 or 6)
       :type version: int
       :return: IP addresses of device, empty list if device is not
                in ACTIVATED state
       :rtype: list of strings
       :raise UnknownDeviceError: if device is not found
       :raise PropertyNotFoundError: if IP configuration is not found
    """
    retval = []
    config = nm_device_ip_config(name, version)
    if config:
        retval = [addrs[0] for addrs in config[0]]

return retval

def nm_device_active_ssid(name):
    """Return ssid of device's active access point.

:param name: name of device
       :type name: str
       :return ssid of active access point, None if device has no active AP
       :rtype: str
       :raise UnknownDeviceError: if device is not found
    """

try:
        aap = nm_device_property(name, "ActiveAccessPoint")
    except PropertyNotFoundError:
        return None

if aap == "/":
        return None

ssid_ay = _get_property(aap, "Ssid", ".AccessPoint")
    ssid = "".join(chr(b) for b in ssid_ay)

return ssid

def nm_device_ip_config(name, version=4):
    """Return IP configurations of device in ACTIVATED state.

:param name: name of device
       :type name: str
       :param version: version of IP protocol (value 4 or 6)
       :type version: int
       :return: IP configuration of device, empty list if device is not
                in ACTIVATED state
       :rtype: [[[address1, prefix1, gateway1], [address2, prefix2, gateway2], ...],
                [nameserver1, nameserver2]]
               addressX, gatewayX: string
               prefixX: int
       :raise UnknownDeviceError: if device is not found
       :raise PropertyNotFoundError: if ip configuration is not found
    """
    state = nm_device_property(name, "State")
    if state != NetworkManager.DeviceState.ACTIVATED:
        return []

if version == 4:
        dbus_iface = ".IP4Config"
        prop= "Ip4Config"
    elif version == 6:
        dbus_iface = ".IP6Config"
        prop= "Ip6Config"
    else:
        return []

config = nm_device_property(name, prop)
    if config == "/":
        return []

try:
        addresses = _get_property(config, "Addresses", dbus_iface)
    # object is valid only if device is in ACTIVATED state (racy)
    except UnknownMethodGetError:
        return []

addr_list = []
    for addr, prefix, gateway in addresses:
        # TODO - look for a library function (could have used IPy but byte order!)
        if version == 4:
            addr_str = nm_dbus_int_to_ipv4(addr)
            gateway_str = nm_dbus_int_to_ipv4(gateway)
        elif version == 6:
            addr_str = nm_dbus_ay_to_ipv6(addr)
            gateway_str = nm_dbus_ay_to_ipv6(gateway)
        addr_list.append([addr_str, prefix, gateway_str])

try:
        nameservers = _get_property(config, "Nameservers", dbus_iface)
    # object is valid only if device is in ACTIVATED state (racy)
    except UnknownMethodGetError:
        return []

ns_list = []
    for ns in nameservers:
        # TODO - look for a library function
        if version == 4:
            ns_str = nm_dbus_int_to_ipv4(ns)
        elif version == 6:
            ns_str = nm_dbus_ay_to_ipv6(ns)
        ns_list.append(ns_str)

return [addr_list, ns_list]

def nm_device_slaves(name):
    """Return slaves of device.

:param name: name of device
       :type name: str
       :return: names of slaves of device or None if device has no 'Slaves' property
       :rtype: list of strings or None
       :raise UnknownDeviceError: if device is not found
    """

try:
        slaves = nm_device_property(name, "Slaves")
    except PropertyNotFoundError:
        return None

slave_ifaces = []
    for slave in slaves:
        iface = _get_property(slave, "Interface", ".Device")
        slave_ifaces.append(iface)

return slave_ifaces

def nm_hwaddr_to_device_name(hwaddr):
    """Return device name of interface with given hardware address.

:param hwaddr: hardware address
        :type hwaddr: str
        :return: device name of interface having hwaddr
        :rtype: str
    """
    for device in nm_devices():
        if nm_device_valid_hwaddress(device).upper() == hwaddr.upper():
            return device
    return None

def nm_ntp_servers_from_dhcp():
    """Return NTP servers obtained by DHCP.

return: NTP servers obtained by DHCP
       rtype: list of str
    """
    ntp_servers = []
    # get paths for all actively connected interfaces
    active_devices = nm_activated_devices()
    for device in active_devices:
        # harvest NTP server addresses from DHCPv4
        dhcp4_path = nm_device_property(device, "Dhcp4Config")
        try:
            options = _get_property(dhcp4_path, "Options", ".DHCP4Config")
        # object is valid only if device is in ACTIVATED state (racy)
        except UnknownMethodGetError:
            options = None
        if options and 'ntp_servers' in options:
            # NTP server addresses returned by DHCP are whitespace delimited
            ntp_servers_string = options["ntp_servers"]
            for ip in ntp_servers_string.split(" "):
                ntp_servers.append(ip)

# NetworkManager does not request NTP/SNTP options for DHCP6
    return ntp_servers

def _is_s390_setting(path):
    """Check if setting of given object path is an s390 setting

:param path: object path of setting object
       :type path: str
       :return: True if the setting is s390 setting, False otherwise
       :rtype: bool
    """

proxy = _get_proxy(object_path=path, interface_name="org.freedesktop.NetworkManager.Settings.Connection")
    settings = proxy.GetSettings()
    return "s390-subchannels" in settings["802-3-ethernet"]

def _device_settings(name):
    """Return list of object paths of device settings

:param name: name of device
       :type name: str
       :return: list of paths of settings of device
       :rtype: []
       :raise UnknownDeviceError: if device is not found
    """
    devtype = nm_device_type(name)
    if devtype == NetworkManager.DeviceType.BOND:
        settings = _find_settings(name, 'bond', 'interface-name')
    elif devtype == NetworkManager.DeviceType.BRIDGE:
        settings = _find_settings(name, 'bridge', 'interface-name')
    elif devtype == NetworkManager.DeviceType.VLAN:
        settings = _find_settings(name, 'vlan', 'interface-name')
        if not settings:
            # connections generated by NM from iBFT
            _parent, _sep, vlanid = name.partition(".")

# If we are not able to convert the VLAN id to an int this
            # is probably a FCoE interface and we're not going to be able
            # to do much with it.
            try:
                vlanid = int(vlanid)
            except ValueError:
                return []

settings = _find_settings(vlanid, 'vlan', 'id')
    else:
        # device name bound settings
        settings = _find_settings(name, 'connection', 'interface-name')
        # mac address bound settings
        try:
            hwaddr_str = nm_device_valid_hwaddress(name)
        except PropertyNotFoundError:
            log.debug("hwaddress of device %s not found", name)
        else:
            mac_bound_settings = _settings_for_hwaddr(hwaddr_str)
            for ms in mac_bound_settings:
                if ms not in settings:
                    settings.append(ms)
        if not settings:
            # s390 setting generated in dracut with net.ifnames=0
            # has neither DEVICE nor HWADDR (#1249750)
            settings = [s for s in _find_settings(name, 'connection', 'id')
                        if _is_s390_setting(s)]

return settings

def _settings_for_ap(ssid):
    """Return list of object paths of wireless access point settings.

:param ssid: ssid of access point
       :type ssid: str
       :return: list of paths of settings of access point
       :rtype: list
`   """
    return _find_settings(ssid, '802-11-wireless', 'ssid',
            format_value=lambda ba: "".join(chr(b) for b in ba))

def _settings_for_hwaddr(hwaddr):
    """Return list of object paths of settings of device specified by hw address.

:param hwaddr: hardware address (uppercase)
       :type hwaddr: str
       :return: list of paths of settings found for hw address
       :rtype: list
    """
    return _find_settings(hwaddr, '802-3-ethernet', 'mac-address',
            format_value=lambda ba: ":".join("%02X" % b for b in ba))

def _find_settings(value, key1, key2, format_value=lambda x:x):
    """Return list of object paths of settings having given value of key1, key2 setting

:param value: required value of setting
       :type value: corresponds to dbus type of setting
       :param key1: first-level key of setting (eg "connection")
       :type key1: str
       :param key2: second-level key of setting (eg "uuid")
       :type key2: str
       :param format_value: function to be called on setting value before
                            comparing
       :type format_value: function taking one argument (setting value)
       :return: list of paths of settings
       :rtype: list
    """
    retval = []

proxy = _get_proxy(object_path="/org/freedesktop/NetworkManager/Settings", interface_name="org.freedesktop.NetworkManager.Settings")

connections = proxy.ListConnections()
    for con in connections:
        proxy = _get_proxy(object_path=con, interface_name="org.freedesktop.NetworkManager.Settings.Connection")
        try:
            settings = proxy.GetSettings()
        except GLib.GError as e:
            log.debug("Exception raised in _find_settings: %s", e)
            continue
        try:
            v = settings[key1][key2]
        except KeyError:
            continue
        if format_value(v) == value:
            retval.append(con)

return retval

def nm_get_settings(value, key1, key2, format_value=lambda x:x):
    """Return settings having given value of key1, key2 setting

Returns list of settings(dicts) , None if settings were not found.
    """
    retval = []
    settings_paths = _find_settings(value, key1, key2, format_value)
    for settings_path in settings_paths:
        proxy = _get_proxy(object_path=settings_path, interface_name="org.freedesktop.NetworkManager.Settings.Connection")
        settings = proxy.GetSettings()
        retval.append(settings)

return retval

def nm_get_all_settings():
    """Return all settings for logging."""
    retval = []

proxy = _get_proxy(object_path="/org/freedesktop/NetworkManager/Settings", interface_name="org.freedesktop.NetworkManager.Settings")

connections = proxy.ListConnections()
    for con in connections:
        proxy = _get_proxy(object_path=con, interface_name="org.freedesktop.NetworkManager.Settings.Connection")
        try:
            settings = proxy.GetSettings()
        except GLib.GError as e:
            log.debug("Exception raised in nm_get_all_settings: %s", e)
            continue
        retval.append(settings)

return retval

def nm_device_setting_value(name, key1, key2):
    """Return value of device's setting specified by key1 and key2.

:param name: name of device
       :type name: str
       :param key1: first-level key of setting (eg "connection")
       :type key1: str
       :param key2: second-level key of setting (eg "uuid")
       :type key2: str
       :return: value of setting or None if the setting was not found
                which means it does not exist or default value is used
                by NM
       :rtype: unpacked GDBus variant or None
       :raise UnknownDeviceError: if device is not found
       :raise SettingsNotFoundError: if settings were not found
                                           (eg for "wlan0")
       :raise MultipleSettingsFoundError: if multiple settings were found
    """
    settings_paths = _device_settings(name)
    if not settings_paths:
        raise SettingsNotFoundError(name)
    elif len(settings_paths) > 1:
        raise MultipleSettingsFoundError(name)
    else:
        settings_path = settings_paths[0]
    proxy = _get_proxy(object_path=settings_path, interface_name="org.freedesktop.NetworkManager.Settings.Connection")
    try:
        settings = proxy.GetSettings()
    except Exception as e:
        log.debug("nm_device_setting_value: %s", e)
        raise SettingsNotFoundError(name)
    try:
        value = settings[key1][key2]
    except KeyError:
        value = None
    return value

def nm_ap_setting_value(ssid, key1, key2):
    """Return value of ap's setting specified by key1 and key2.

:param ssid: name of ap (ssid)
       :type ssid: str
       :param key1: first-level key of setting (eg "connection")
       :type key1: str
       :param key2: second-level key of setting (eg "uuid")
       :type key2: str
       :return: value of setting or None if the setting was not found
                which means it does not exist or default value is used
                by NM
       :rtype: unpacked GDBus variant or None
       :raise SettingsNotFoundError: if settings were not found
                                           (eg for "wlan0")
    """
    settings_paths = _settings_for_ap(ssid)
    if not settings_paths:
        raise SettingsNotFoundError(ssid)
    else:
        settings_path = settings_paths[0]
    proxy = _get_proxy(object_path=settings_path, interface_name="org.freedesktop.NetworkManager.Settings.Connection")
    settings = proxy.GetSettings()
    try:
        value = settings[key1][key2]
    except KeyError:
        value = None
    return value

def nm_disconnect_device(name):
    """Disconnect the device.

:raise UnknownDeviceError: if device is not found
    """
    proxy = _get_proxy()
    try:
        device = proxy.GetDeviceByIpIface('(s)', name)
    except GLib.GError as e:
        # pylint: disable=unsupported-membership-test
        if "org.freedesktop.NetworkManager.UnknownDevice" in e.message:
            raise UnknownDeviceError(name, e)
        raise

device_proxy = _get_proxy(object_path=device, interface_name="org.freedesktop.NetworkManager.Device")
    try:
        device_proxy.Disconnect()
    except GLib.GError as e:
        # pylint: disable=unsupported-membership-test
        if "org.freedesktop.NetworkManager.Device.NotActive" in e.message:
            raise DeviceNotActiveError(name, e)
        raise

def nm_activate_device_connection(dev_name, con_uuid):
    """Activate device with specified connection.

:param dev_name: name of device or None for virtual devices
       :type dev_name: str or None
       :param con_uuid: uuid of connection to be activated on device
       :type con_uuid: str
       :raise UnknownDeviceError: if device is not found
       :raise UnmanagedDeviceError: if device is not managed by NM
                                    or unavailable
       :raise SettingsNotFoundError: if conneciton with given uuid was not found
       :raise UnknownConnectionError: if connection is not available for the device
    """

if dev_name is None:
        # virtual devices (eg bond, vlan)
        device_path = "/"
    else:
        proxy = _get_proxy()
        try:
            device_path = proxy.GetDeviceByIpIface('(s)', dev_name)
        except Exception as e:
            if "org.freedesktop.NetworkManager.UnknownDevice" in e.message:
                raise UnknownDeviceError(dev_name, e)
            raise

con_paths = _find_settings(con_uuid, 'connection', 'uuid')
    if not con_paths:
        raise SettingsNotFoundError(con_uuid)

nm_proxy = _get_proxy()
    try:
        nm_proxy.ActivateConnection('(ooo)', con_paths[0], device_path, "/")
    except GLib.GError as e:
        if "org.freedesktop.NetworkManager.UnmanagedDevice" in e.message:
            raise UnmanagedDeviceError(dev_name, e)
        elif "org.freedesktop.NetworkManager.UnknownConnection" in e.message:
            raise UnknownConnectionError(dev_name, e)
        if "org.freedesktop.NetworkManager.UnknownDevice" in e.message:
            raise UnknownDeviceError(dev_name, e)
        raise

def nm_add_connection(values):
    """Add new connection specified by values.

:param values: list of settings with new values and its types
                      [[key1, key2, value, type_str], ...]
                      key1: first-level key of setting (eg "connection")
                      key2: second-level key of setting (eg "uuid")
                      value: new value
                      type_str: dbus type of new value (eg "ay")
       :type values: [[key1, key2, value, type_str], ...]
                     key1: str
                     key2: str
                     value: object
                     type_str: str
    """

settings = {}
    for key1, key2, value, type_str in values:
        gvalue = GLib.Variant(type_str, value)
        if key1 not in settings:
            settings[key1] = {}
        settings[key1][key2] = gvalue

proxy = _get_proxy(object_path="/org/freedesktop/NetworkManager/Settings",
                       interface_name="org.freedesktop.NetworkManager.Settings")
    try:
        connection = proxy.AddConnection('(a{sa{sv}})', settings)
    except GLib.GError as e:
        # pylint: disable=unsupported-membership-test
        if "bond.options: invalid option" in e.message:
            raise BondOptionsError(e)
        raise
    return connection

def nm_delete_connection(uuid):
    """Delete connection specified by uuid.

:param uuid: uuid of connection to be deleted
       :type uuid: str
       :return: True if connection was deleted, False if it was not found
       :rtype: bool
    """

settings_paths = _find_settings(uuid, "connection", "uuid")
    if not settings_paths:
        return False
    proxy = _get_proxy(object_path=settings_paths[0], interface_name="org.freedesktop.NetworkManager.Settings.Connection")
    proxy.Delete()

def nm_update_settings(uuid, new_values):
    """Update settings of connection given by uuid.

The type of value is determined from existing settings of device.
       If setting for key1, key2 does not exist, default_type_str is used or
       if None, the type is inferred from the value supplied (string and bool only).

:param uuid: uuid of the connection
       :type name: str
       :param new_values: list of settings with new values and its types
                          [[key1, key2, value, default_type_str]]
                          key1: first-level key of setting (eg "connection")
                          key2: second-level key of setting (eg "uuid")
                          value: new value
                          default_type_str: dbus type of new value to be used
                                            if the setting does not already exist;
                                            if None, the type is inferred from
                                            value (string and bool only)
       :type new_values: [[key1, key2, value, default_type_str], ...]
                         key1: str
                         key2: str
                         value:
                         default_type_str: str
       :raise SettingsNotFoundError: if settings were not found (eg for "wlan0")
    """
    settings_paths = _find_settings(uuid, "connection", "uuid")
    if not settings_paths:
        raise SettingsNotFoundError(uuid)
    return _update_settings(settings_paths[0], new_values)

def nm_update_settings_of_device(name, new_values):
    """Update setting of device.

:param name: name of device
       :type name: str
       :param new_values: list of settings with new values and its types
                          [[key1, key2, value, default_type_str]]
                          key1: first-level key of setting (eg "connection")
                          key2: second-level key of setting (eg "uuid")
                          value: new value
                          default_type_str: dbus type of new value to be used
                                            if the setting does not already exist;
                                            if None, the type is inferred from
                                            value (string and bool only)
       :type new_values: [[key1, key2, value, default_type_str], ...]
                         key1: str
                         key2: str
                         value:
                         default_type_str: str
       :raise UnknownDeviceError: if device is not found
       :raise SettingsNotFoundError: if settings were not found
                                           (eg for "wlan0")
       :raise MultipleSettingsFoundError: if multiple settings were found
    """
    settings_paths = _device_settings(name)
    if not settings_paths:
        raise SettingsNotFoundError(name)
    elif len(settings_paths) > 1:
        raise MultipleSettingsFoundError(name)
    else:
        settings_path = settings_paths[0]
    return _update_settings(settings_path, new_values)

def _update_settings(settings_path, new_values):
    """Update setting of object specified by settings_path with value.

If the value is None, the setting is removed.

The type of value is determined from existing setting.
       If setting for key1, key2 does not exist, default_type_str is used or
       if None, the type is inferred from the value supplied (string and bool only).

:param settings_path: path of settings object
       :type settings_path: str
       :param new_values: list of settings with new values and its types
                          [[key1, key2, value, default_type_str]]
                          key1: first-level key of setting (eg "connection")
                          key2: second-level key of setting (eg "uuid")
                          value: new value, if None, the setting is removed
                          default_type_str: dbus type of new value to be used
                                            if the setting does not already exist;
                                            if None, the type is inferred from
                                            value (string and bool only)
       :type new_values: [[key1, key2, value, default_type_str], ...]
                         key1: str
                         key2: str
                         value:
                         default_type_str: str
    """
    proxy = _get_proxy(object_path=settings_path, interface_name="org.freedesktop.NetworkManager.Settings.Connection")
    args = None
    settings = proxy.call_sync("GetSettings",
                               args,
                               Gio.DBusCallFlags.NONE,
                               DEFAULT_DBUS_TIMEOUT,
                               None)
    for key1, key2, value, default_type_str in new_values:
        settings = _gvariant_settings(settings, key1, key2, value, default_type_str)

proxy.call_sync("Update",
                    settings,
                    Gio.DBusCallFlags.NONE,
                    DEFAULT_DBUS_TIMEOUT,
                    None)

def _gvariant_settings(settings, updated_key1, updated_key2, value, default_type_str=None):
    """Update setting of updated_key1, updated_key2 of settings object with value.

If the value is None, the setting is removed.

The type of value is determined from existing setting.
       If setting for key1, key2 does not exist, default_type_str is used or
       the type is inferred from the value supplied (string and bool only).
    """

type_str = default_type_str

# build copy of GVariant settings as mutable python object
    new_settings = {}
    dict1 = settings.get_child_value(0)

# loop over first level dict (key1)
    for key1_idx in range(dict1.n_children()):

key_dict2 = dict1.get_child_value(key1_idx)
        key1 = key_dict2.get_child_value(0).unpack()
        new_settings[key1] = {}
        dict2 = key_dict2.get_child_value(1)

# loop over second level dict (key2)
        for key2_idx in range(dict2.n_children()):

key_val = dict2.get_child_value(key2_idx)
            key2 = key_val.get_child_value(0).unpack()
            val = key_val.get_child_value(1).get_child_value(0)

# get type string of updated value
            if key1 == updated_key1 and key2 == updated_key2:
                type_str = val.get_type_string()

# copy old value to new python object
            new_settings[key1][key2] = val

if type_str is None:
        # infer the new value type for string and boolean
        if type(value) is type(True):
            type_str = 'b'
        if type(value) is type(''):
            type_str = 's'

if type_str is not None:
        if updated_key1 not in new_settings:
            new_settings[updated_key1] = {}
        if value is None:
            new_settings[updated_key1].pop(updated_key2, None)
        else:
            new_settings[updated_key1][updated_key2] = GLib.Variant(type_str, value)

return GLib.Variant(settings.get_type_string(), (new_settings,))

def nm_ipv6_to_dbus_ay(address):
    """Convert ipv6 address from string to list of bytes 'ay' for dbus

:param address: IPv6 address
    :type address: str
    :return: address in format 'ay' for NM dbus setting
    :rtype: list of bytes
    """
    return [int(byte, 16) for byte in re.findall('.{1,2}', IPy.IP(address).strFullsize().replace(':', ''))]

def nm_ipv4_to_dbus_int(address):
    """Convert ipv4 address from string to int for dbus (switched endianess).

:param address: IPv4 address
    :type address: str
    :return: IPv4 address as an integer 'u' for NM dbus setting
    :rtype: integer
    """
    return struct.unpack("=L", socket.inet_aton(address))[0]

def nm_dbus_ay_to_ipv6(bytelist):
    """Convert ipv6 address from list of bytes (dbus 'ay') to string.

:param address: IPv6 address as list of bytes returned by dbus ('ay')
    :type address: list of bytes - dbus 'ay'
    :return: IPv6 address
    :rtype: str
    """
    return socket.inet_ntop(socket.AF_INET6, "".join(chr(byte) for byte in bytelist))

def nm_dbus_int_to_ipv4(address):
    """Convert ipv4 address from dus int 'u' (switched endianess) to string.

:param address: IPv4 address as integer returned by dbus ('u')
    :type address: integer - dbus 'u'
    :return: IPv6 address
    :rtype: str
    """
    return socket.inet_ntop(socket.AF_INET, struct.pack('=L', address))

def test():
    print("NM state: %s:" % nm_state())
    print("NM is connected: %s" % nm_is_connected())

print("Devices: %s" % nm_devices())
    print("Activated devices: %s" % nm_activated_devices())

wireless_device = ""

devs = nm_devices()
    devs.append("nonexisting")
    for devname in devs:

print(devname)

try:
            devtype = nm_device_type(devname)
        except UnknownDeviceError as e:
            print("     %s" % e)
            devtype = None
        if devtype == NetworkManager.DeviceType.ETHERNET:
            print("     type %s" % "ETHERNET")
        elif devtype == NetworkManager.DeviceType.WIFI:
            print("     type %s" % "WIFI")
            wireless_device = devname

try:
            print("     Wifi device: %s" % nm_device_type_is_wifi(devname))
        except UnknownDeviceError as e:
            print("     %s" % e)

try:
            hwaddr = nm_device_hwaddress(devname)
            print("     HwAaddress: %s" % hwaddr)
        except ValueError as e:
            print("     %s" % e)
            hwaddr = ""

try:
            print("     Carrier: %s" % nm_device_carrier(devname))
        except ValueError as e:
            print("     %s" % e)

try:
            print("     IP4 config: %s" % nm_device_ip_config(devname))
            print("     IP6 config: %s" % nm_device_ip_config(devname, version=6))
            print("     IP4 addrs: %s" % nm_device_ip_addresses(devname))
            print("     IP6 addrs: %s" % nm_device_ip_addresses(devname, version=6))
            print("     Udi: %s" % nm_device_property(devname, "Udi"))
        except UnknownDeviceError as e:
            print("     %s" % e)

if devname in nm_devices():
            try:
                print("     Nonexisting: %s" % nm_device_property(devname, "Nonexisting"))
            except PropertyNotFoundError as e:
                print("     %s" % e)
        try:
            print("     Nonexisting: %s" % nm_device_property(devname, "Nonexisting"))
        except ValueError as e:
            print("     %s" % e)

try:
            print("     Settings: %s" % _device_settings(devname))
        except UnknownDeviceError as e:
            print("     %s" % e)
        try:
            print("     Settings for hwaddr %s: %s" % (hwaddr, _settings_for_hwaddr(hwaddr)))
        except UnknownDeviceError as e:
            print("     %s" % e)
        try:
            print("     Setting value %s %s: %s" % ("ipv6", "method", nm_device_setting_value(devname, "ipv6", "method")))
        except ValueError as e:
            print("     %s" % e)
        try:
            print("     Setting value %s %s: %s" % ("ipv7", "method", nm_device_setting_value(devname, "ipv7", "method")))
        except ValueError as e:
            print("     %s" % e)

ssid = "Red Hat Guest"
    print("Settings for AP %s: %s" % (ssid, _settings_for_ap(ssid)))
    ssid = "nonexisting"
    print("Settings for AP %s: %s" % (ssid, _settings_for_ap(ssid)))

devname = devs[0]
    key1 = "connection"
    key2 = "autoconnect"
    original_value = nm_device_setting_value(devname, key1, key2)
    print("Value of setting %s %s: %s" % (key1, key2, original_value))
    # None means default in this case, which is true
    if original_value in (None, True):
        new_value = False
    else:
        new_value = True

print("Updating to %s" % new_value)
    nm_update_settings_of_device(devname, [[key1, key2, new_value, None]])
    print("Value of setting %s %s: %s" % (key1, key2, nm_device_setting_value(devname, key1, key2)))
    nm_update_settings_of_device(devname, [[key1, key2, original_value, None]])
    print("Value of setting %s %s: %s" % (key1, key2, nm_device_setting_value(devname, key1, key2)))
    nm_update_settings_of_device(devname, [[key1, key2, original_value, "b"]])
    print("Value of setting %s %s: %s" % (key1, key2, nm_device_setting_value(devname, key1, key2)))

nm_update_settings_of_device(devname, [[key1, "nonexisting", new_value, None]])
    nm_update_settings_of_device(devname, [["nonexisting", "nonexisting", new_value, None]])
    try:
        nm_update_settings_of_device("nonexixting", [[key1, key2, new_value, None]])
    except UnknownDeviceError as e:
        print("%s" % e)

if wireless_device:
        try:
            nm_update_settings_of_device(wireless_device, [[key1, key2, new_value, None]])
        except SettingsNotFoundError as e:
            print("%s" % e)

#nm_update_settings_of_device(devname, [["connection", "id", "test", None]])
    #nm_update_settings_of_device(devname, [["connection", "timestamp", 11111111, None]])
    #nm_update_settings_of_device(devname, [["802-3-ethernet", "mac-address", [55,55,55,55,55,55], None]])
    #nm_update_settings_of_device(devname, [["ipv6", "method", "auto", None]])
    #nm_update_settings_of_device(devname, [["ipv6", "addressess", [[[32,1,0,0,0,0,0,0,0,0,0,0,0,0,0,a], 64, [0]*16]], None]])
    #nm_update_settings_of_device(devname, [["connection", "autoconnect", True, None]])
    #nm_update_settings_of_device(devname, [["connection", "autoconnect", False, "b"]])

if __name__ == "__main__":
    test()