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# networking - Monitor the network status
#
# Copyright (c) 2010 Mohamed Amine IL Idrissi
# Copyright (c) 2011 Canonical
# Copyright (c) 2011 Sebastian Heinlein
#
# Author: Alex Chiang <achiang@canonical.com>
# Michael Vogt <michael.vogt@ubuntu.com>
# Mohamed Amine IL Idrissi <ilidrissiamine@gmail.com>
# Sebastian Heinlein <devel@glatzor.de>
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation; either version 2 of the
# License, or (at your option) any later version.
#
# 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, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
# USA
from defer import Deferred, inline_callbacks, return_value
from gi.repository import GObject
from gi.repository import Gio
from gi.repository import GLib
from gi.repository import PackageKitGlib as pk
import dbus
from dbus.mainloop.glib import DBusGMainLoop
DBusGMainLoop(set_as_default=True)
import logging
import os
log = logging.getLogger("AptDaemon.NetMonitor")
class NetworkMonitorBase(GObject.GObject):
"""Check the network state."""
__gsignals__ = {"network-state-changed": (GObject.SignalFlags.RUN_FIRST,
None,
(GObject.TYPE_PYOBJECT,))}
def __init__(self):
log.debug("Initializing network monitor")
GObject.GObject.__init__(self)
self._state = pk.NetworkEnum.ONLINE
def _set_state(self, enum):
if self._state != enum:
log.debug("Network state changed: %s", enum)
self._state = enum
self.emit("network-state-changed", enum)
def _get_state(self):
return self._state
state = property(_get_state, _set_state)
@inline_callbacks
def get_network_state(self):
"""Update the network state."""
return_value(self._state)
class ProcNetworkMonitor(NetworkMonitorBase):
"""Use the route information of the proc filesystem to detect
the network state.
"""
def __init__(self):
log.debug("Initializing proc based network monitor")
NetworkMonitorBase.__init__(self)
self._state = pk.NetworkEnum.OFFLINE
self._file = Gio.File.new_for_path("/proc/net/route")
self._monitor = Gio.File.monitor(self._file,
Gio.FileMonitorFlags.NONE,
None)
self._monitor.connect("changed",
self._on_route_file_changed)
def _on_route_file_changed(self, *args):
self.get_network_state()
def _parse_route_file(self):
"""Parse the route file - taken from PackageKit"""
with open("/proc/net/route") as route_file:
for line in route_file.readlines():
rows = line.split("\t")
# The header line?
if rows[0] == "Iface":
continue
# A loopback device?
elif rows[0] == "lo":
continue
# Correct number of rows?
elif len(rows) != 11:
continue
# The route is a default gateway
elif rows[1] == "00000000":
break
# A gateway is set
elif rows[2] != "00000000":
break
else:
return pk.NetworkEnum.OFFLINE
return pk.NetworkEnum.ONLINE
@inline_callbacks
def get_network_state(self):
"""Update the network state."""
self.state = self._parse_route_file()
return_value(self.state)
class NetworkManagerMonitor(NetworkMonitorBase):
"""Use NetworkManager to monitor network state."""
NM_DBUS_IFACE = "org.freedesktop.NetworkManager"
NM_ACTIVE_CONN_DBUS_IFACE = NM_DBUS_IFACE + ".Connection.Active"
NM_DEVICE_DBUS_IFACE = NM_DBUS_IFACE + ".Device"
# The device type is unknown
NM_DEVICE_TYPE_UNKNOWN = 0
# The device is wired Ethernet device
NM_DEVICE_TYPE_ETHERNET = 1
# The device is an 802.11 WiFi device
NM_DEVICE_TYPE_WIFI = 2
# The device is a GSM-based cellular WAN device
NM_DEVICE_TYPE_GSM = 3
# The device is a CDMA/IS-95-based cellular WAN device
NM_DEVICE_TYPE_CDMA = 4
def __init__(self):
log.debug("Initializing NetworkManager monitor")
NetworkMonitorBase.__init__(self)
self.bus = dbus.SystemBus()
self.proxy = self.bus.get_object("org.freedesktop.NetworkManager",
"/org/freedesktop/NetworkManager")
self.proxy.connect_to_signal("PropertiesChanged",
self._on_nm_properties_changed,
dbus_interface=self.NM_DBUS_IFACE)
self.bus.add_signal_receiver(
self._on_nm_active_conn_props_changed,
signal_name="PropertiesChanged",
dbus_interface=self.NM_ACTIVE_CONN_DBUS_IFACE)
@staticmethod
def get_dbus_property(proxy, interface, property):
"""Small helper to get the property value of a dbus object."""
props = dbus.Interface(proxy, "org.freedesktop.DBus.Properties")
deferred = Deferred()
props.Get(interface, property,
reply_handler=deferred.callback,
error_handler=deferred.errback)
return deferred
@inline_callbacks
def _on_nm_properties_changed(self, props):
"""Callback if NetworkManager properties changed."""
if "ActiveConnections" in props:
if not props["ActiveConnections"]:
log.debug("There aren't any active connections")
self.state = pk.NetworkEnum.OFFLINE
else:
yield self.get_network_state()
@inline_callbacks
def _on_nm_active_conn_props_changed(self, props):
"""Callback if properties of the active connection changed."""
if "Default" not in props:
raise StopIteration
yield self.get_network_state()
@inline_callbacks
def _query_network_manager(self):
"""Query NetworkManager about the network state."""
state = pk.NetworkEnum.OFFLINE
try:
active_conns = yield self.get_dbus_property(self.proxy,
self.NM_DBUS_IFACE,
"ActiveConnections")
except dbus.DBusException:
log.warning("Failed to determinate network state")
return_value(state)
for conn in active_conns:
conn_obj = self.bus.get_object(self.NM_DBUS_IFACE, conn)
try:
is_default = yield self.get_dbus_property(
conn_obj, self.NM_ACTIVE_CONN_DBUS_IFACE, "Default")
if not is_default:
continue
devs = yield self.get_dbus_property(
conn_obj, self.NM_ACTIVE_CONN_DBUS_IFACE, "Devices")
except dbus.DBusException:
log.warning("Failed to determinate network state")
break
priority_device_type = -1
for dev in devs:
try:
dev_obj = self.bus.get_object(self.NM_DBUS_IFACE, dev)
dev_type = yield self.get_dbus_property(
dev_obj, self.NM_DEVICE_DBUS_IFACE, "DeviceType")
except dbus.DBusException:
log.warning("Failed to determinate network state")
return_value(pk.NetworkEnum.UNKNOWN)
# prioterizse device types, since a bridged GSM/CDMA connection
# should be returned as a GSM/CDMA one
# The NM_DEVICE_TYPE_* enums are luckly ordered in this sense.
if dev_type <= priority_device_type:
continue
priority_device_type = dev_type
if dev_type in (self.NM_DEVICE_TYPE_GSM,
self.NM_DEVICE_TYPE_CDMA):
state = pk.NetworkEnum.MOBILE
elif dev_type == self.NM_DEVICE_TYPE_ETHERNET:
state = pk.NetworkEnum.WIRED
elif dev_type == self.NM_DEVICE_TYPE_WIFI:
state = pk.NetworkEnum.WIFI
elif dev_type == self.NM_DEVICE_TYPE_UNKNOWN:
state = pk.NetworkEnum.OFFLINE
else:
state = pk.NetworkEnum.ONLINE
return_value(state)
@inline_callbacks
def get_network_state(self):
"""Update the network state."""
self.state = yield self._query_network_manager()
return_value(self.state)
def get_network_monitor(fallback=False):
"""Return a network monitor."""
if fallback:
return ProcNetworkMonitor()
try:
return NetworkManagerMonitor()
except dbus.DBusException:
pass
if os.path.exists("/proc/net/route"):
return ProcNetworkMonitor()
return NetworkMonitorBase()
if __name__ == "__main__":
@inline_callbacks
def _call_monitor():
state = yield monitor.get_network_state()
print(("Initial network state: %s" % state))
log_handler = logging.StreamHandler()
log.addHandler(log_handler)
log.setLevel(logging.DEBUG)
monitor = get_network_monitor(True)
_call_monitor()
loop = GLib.MainLoop()
loop.run()
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