path: root/extensions/deviceicon/network.py

#
# Copyright (C) 2008 One Laptop Per Child
# Copyright (C) 2009 Tomeu Vizoso, Simon Schampijer
# Copyright (C) 2009 Paraguay Educa, Martin Abente
# Copyright (C) 2010 Plan Ceibal, Daniel Castelo
#
# 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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

from gettext import gettext as _
import logging
import hashlib
import socket
import struct
import re
import datetime
import time
import gtk
import gobject
import gconf
import dbus

from sugar.graphics.icon import get_icon_state
from sugar.graphics import style
from sugar.graphics.palette import Palette
from sugar.graphics.toolbutton import ToolButton
from sugar.graphics.tray import TrayIcon
from sugar.graphics import xocolor
from sugar.util import unique_id
from sugar import profile

from jarabe.model import network
from jarabe.model.network import Settings
from jarabe.model.network import IP4Config
from jarabe.frame.frameinvoker import FrameWidgetInvoker
from jarabe.view.pulsingicon import PulsingIcon

IP_ADDRESS_TEXT_TEMPLATE = _("IP address: %s")

_NM_SERVICE = 'org.freedesktop.NetworkManager'
_NM_IFACE = 'org.freedesktop.NetworkManager'
_NM_PATH = '/org/freedesktop/NetworkManager'
_NM_DEVICE_IFACE = 'org.freedesktop.NetworkManager.Device'
_NM_WIRED_IFACE = 'org.freedesktop.NetworkManager.Device.Wired'
_NM_WIRELESS_IFACE = 'org.freedesktop.NetworkManager.Device.Wireless'
_NM_SERIAL_IFACE = 'org.freedesktop.NetworkManager.Device.Serial'
_NM_OLPC_MESH_IFACE = 'org.freedesktop.NetworkManager.Device.OlpcMesh'
_NM_ACCESSPOINT_IFACE = 'org.freedesktop.NetworkManager.AccessPoint'
_NM_ACTIVE_CONN_IFACE = 'org.freedesktop.NetworkManager.Connection.Active'

_GSM_STATE_NOT_READY = 0
_GSM_STATE_DISCONNECTED = 1
_GSM_STATE_CONNECTING = 2
_GSM_STATE_CONNECTED = 3

def frequency_to_channel(frequency):
    ftoc = { 2412: 1, 2417: 2, 2422: 3, 2427: 4,
             2432: 5, 2437: 6, 2442: 7, 2447: 8,
             2452: 9, 2457: 10, 2462: 11, 2467: 12,
             2472: 13}
    return ftoc[frequency]

class WirelessPalette(Palette):
    __gtype_name__ = 'SugarWirelessPalette'

    __gsignals__ = {
        'deactivate-connection' : (gobject.SIGNAL_RUN_FIRST,
                                   gobject.TYPE_NONE, ([])),
        'create-connection'     : (gobject.SIGNAL_RUN_FIRST,
                                   gobject.TYPE_NONE, ([])),
    }

    def __init__(self, primary_text, can_create=True):
        Palette.__init__(self, label=primary_text)

        self._disconnect_item = None

        self._channel_label = gtk.Label()
        self._channel_label.props.xalign = 0.0
        self._channel_label.show()

        self._ip_address_label = gtk.Label()

        self._info = gtk.VBox()

        def _padded(child, xalign=0, yalign=0.5):
            padder = gtk.Alignment(xalign=xalign, yalign=yalign,
                                   xscale=1, yscale=0.33)
            padder.set_padding(style.DEFAULT_SPACING,
                               style.DEFAULT_SPACING,
                               style.DEFAULT_SPACING,
                               style.DEFAULT_SPACING)
            padder.add(child)
            return padder

        self._info.pack_start(_padded(self._channel_label))
        self._info.pack_start(_padded(self._ip_address_label))
        self._info.show_all()

        self._disconnect_item = gtk.MenuItem(_('Disconnect...'))
        self._disconnect_item.connect('activate', self.__disconnect_activate_cb)
        self.menu.append(self._disconnect_item)

        if can_create:
            self._adhoc_item = gtk.MenuItem(_('Create new wireless network'))
            self._adhoc_item.connect('activate', self.__adhoc_activate_cb)
            self.menu.append(self._adhoc_item)
            self._adhoc_item.show()

    def set_connecting(self):
        self.props.secondary_text = _('Connecting...')

    def _set_connected(self, iaddress):
        self.set_content(self._info)
        self.props.secondary_text = _('Connected')
        self._set_ip_address(iaddress)
        self._disconnect_item.show()

    def set_connected_with_frequency(self, frequency, iaddress):
        self._set_connected(iaddress)
        self._set_frequency(frequency)

    def set_connected_with_channel(self, channel, iaddress):
        self._set_connected(iaddress)
        self._set_channel(channel)

    def set_disconnected(self):
        self.props.primary_text = ''
        self.props.secondary_text = ''
        self._disconnect_item.hide()
        self.set_content(None)

    def __disconnect_activate_cb(self, menuitem):
        self.emit('deactivate-connection')

    def __adhoc_activate_cb(self, menuitem):
        self.emit('create-connection')

    def _set_frequency(self, frequency):
        try:
            channel = frequency_to_channel(frequency)
        except KeyError:
            channel = 0
        self._set_channel(channel)

    def _set_channel(self, channel):
        self._channel_label.set_text("%s: %d" % (_("Channel"), channel))

    def _set_ip_address(self, ip_address):
        if ip_address is not None:
            ip_address_text = IP_ADDRESS_TEXT_TEMPLATE % \
                socket.inet_ntoa(struct.pack('I', ip_address))
        else:
            ip_address_text = ""
        self._ip_address_label.set_text(ip_address_text)


class WiredPalette(Palette):
    __gtype_name__ = 'SugarWiredPalette'

    def __init__(self):
        Palette.__init__(self, label=_('Wired Network'))

        self._speed_label = gtk.Label()
        self._speed_label.props.xalign = 0.0
        self._speed_label.show()

        self._ip_address_label = gtk.Label()

        self._info = gtk.VBox()

        def _padded(child, xalign=0, yalign=0.5):
            padder = gtk.Alignment(xalign=xalign, yalign=yalign,
                                   xscale=1, yscale=0.33)
            padder.set_padding(style.DEFAULT_SPACING,
                               style.DEFAULT_SPACING,
                               style.DEFAULT_SPACING,
                               style.DEFAULT_SPACING)
            padder.add(child)
            return padder

        self._info.pack_start(_padded(self._speed_label))
        self._info.pack_start(_padded(self._ip_address_label))
        self._info.show_all()

        self.set_content(self._info)
        self.props.secondary_text = _('Connected')

    def set_connected(self, speed, iaddress):
        self._speed_label.set_text('%s: %d Mb/s' % (_('Speed'), speed))
        self._set_ip_address(iaddress)

    def _inet_ntoa(self, iaddress):
        address = ['%s' % ((iaddress >> i) % 256) for i in [0, 8, 16, 24]]
        return ".".join(address)

    def _set_ip_address(self, ip_address):
        if ip_address is not None:
            ip_address_text = IP_ADDRESS_TEXT_TEMPLATE % \
                socket.inet_ntoa(struct.pack('I', ip_address))
        else:
            ip_address_text = ""
        self._ip_address_label.set_text(ip_address_text)

class GsmPalette(Palette):
    __gtype_name__ = 'SugarGsmPalette'

    __gsignals__ = {
        'gsm-connect'         : (gobject.SIGNAL_RUN_FIRST,
                                 gobject.TYPE_NONE, ([])),
        'gsm-disconnect'      : (gobject.SIGNAL_RUN_FIRST,
                                 gobject.TYPE_NONE, ([])),
    }

    def __init__(self):

        Palette.__init__(self, label=_('Wireless modem'))

        self._current_state = None

        self._toggle_state_item = gtk.MenuItem('')
        self._toggle_state_item.connect('activate', self.__toggle_state_cb)
        self.menu.append(self._toggle_state_item)
        self._toggle_state_item.show()

        self.set_state(_GSM_STATE_NOT_READY)

        self.info_box = gtk.VBox()

        self.data_label = gtk.Label()
        self.data_label.props.xalign = 0.0
        label_alignment = self._add_widget_with_padding(self.data_label)
        self.info_box.pack_start(label_alignment)
        self.data_label.show()
        label_alignment.show()

        self.connection_time_label = gtk.Label()
        self.connection_time_label.props.xalign = 0.0
        label_alignment = self._add_widget_with_padding( \
                self.connection_time_label)
        self.info_box.pack_start(label_alignment)
        self.connection_time_label.show()
        label_alignment.show()

        self.info_box.show()
        self.set_content(self.info_box)

    def _add_widget_with_padding(self, child, xalign=0, yalign=0.5):
        alignment = gtk.Alignment(xalign=xalign, yalign=yalign,
                                  xscale=1, yscale=0.33)
        alignment.set_padding(style.DEFAULT_SPACING,
                              style.DEFAULT_SPACING,
                              style.DEFAULT_SPACING,
                              style.DEFAULT_SPACING)
        alignment.add(child)
        return alignment

    def set_state(self, state):
        self._current_state = state
        self._update_label_and_text()

    def _update_label_and_text(self):
        if self._current_state == _GSM_STATE_NOT_READY:
            self._toggle_state_item.get_child().set_label('...')
            self.props.secondary_text = _('Please wait...')

        elif self._current_state == _GSM_STATE_DISCONNECTED:
            self._toggle_state_item.get_child().set_label(_('Connect'))
            self.props.secondary_text = _('Disconnected')

        elif self._current_state == _GSM_STATE_CONNECTING:
            self._toggle_state_item.get_child().set_label(_('Cancel'))
            self.props.secondary_text = _('Connecting...')

        elif self._current_state == _GSM_STATE_CONNECTED:
            self._toggle_state_item.get_child().set_label(_('Disconnect'))
            self.props.secondary_text = _('Connected')
        else:
            raise ValueError('Invalid GSM state while updating label and ' \
                             'text, %s' % str(self._current_state))

    def __toggle_state_cb(self, menuitem):
        if self._current_state == _GSM_STATE_NOT_READY:
            pass
        elif self._current_state == _GSM_STATE_DISCONNECTED:
            self.emit('gsm-connect')
        elif self._current_state == _GSM_STATE_CONNECTING:
            self.emit('gsm-disconnect')
        elif self._current_state == _GSM_STATE_CONNECTED:
            self.emit('gsm-disconnect')
        else:
            raise ValueError('Invalid GSM state while emitting signal, %s' % \
                             str(self._current_state))


class WirelessDeviceView(ToolButton):

    _ICON_NAME = 'network-wireless'
    FRAME_POSITION_RELATIVE = 302

    def __init__(self, device):
        ToolButton.__init__(self)

        self._bus = dbus.SystemBus()
        self._device = device
        self._device_props = None
        self._flags = 0
        self._name = ''
        self._mode = network.NM_802_11_MODE_UNKNOWN
        self._strength = 0
        self._frequency = 0
        self._device_state = None
        self._color = None
        self._active_ap_op = None

        self._icon = PulsingIcon()
        self._icon.props.icon_name = get_icon_state(self._ICON_NAME, 0)
        self._inactive_color = xocolor.XoColor( \
            "%s,%s" % (style.COLOR_BUTTON_GREY.get_svg(),
                       style.COLOR_TRANSPARENT.get_svg()))
        self._icon.props.pulse_color = self._inactive_color
        self._icon.props.base_color = self._inactive_color

        self.set_icon_widget(self._icon)
        self._icon.show()

        self.set_palette_invoker(FrameWidgetInvoker(self))
        self._palette = WirelessPalette(self._name)
        self._palette.connect('deactivate-connection',
                              self.__deactivate_connection_cb)
        self._palette.connect('create-connection',
                              self.__create_connection_cb)
        self.set_palette(self._palette)
        self._palette.set_group_id('frame')

        self._device_props = dbus.Interface(self._device, 
                                            'org.freedesktop.DBus.Properties')
        self._device_props.GetAll(_NM_DEVICE_IFACE, byte_arrays=True, 
                              reply_handler=self.__get_device_props_reply_cb,
                              error_handler=self.__get_device_props_error_cb)

        self._device_props.Get(_NM_WIRELESS_IFACE, 'ActiveAccessPoint',
                               reply_handler=self.__get_active_ap_reply_cb,
                               error_handler=self.__get_active_ap_error_cb)

        self._bus.add_signal_receiver(self.__state_changed_cb,
                                      signal_name='StateChanged',
                                      path=self._device.object_path,
                                      dbus_interface=_NM_DEVICE_IFACE)

    def disconnect(self):
        self._bus.remove_signal_receiver(self.__state_changed_cb,
                                         signal_name='StateChanged',
                                         path=self._device.object_path,
                                         dbus_interface=_NM_DEVICE_IFACE)

    def __get_device_props_reply_cb(self, properties):
        if 'State' in properties:
            self._device_state = properties['State']
            self._update_state()

    def __get_device_props_error_cb(self, err):
        logging.error('Error getting the device properties: %s', err)

    def __get_active_ap_reply_cb(self, active_ap_op):
        if self._active_ap_op != active_ap_op:
            if self._active_ap_op is not None:
                self._bus.remove_signal_receiver(
                    self.__ap_properties_changed_cb,
                    signal_name='PropertiesChanged',
                    path=self._active_ap_op,
                    dbus_interface=_NM_ACCESSPOINT_IFACE)
            if active_ap_op == '/':
                self._active_ap_op = None
                return
            self._active_ap_op = active_ap_op
            active_ap = self._bus.get_object(_NM_SERVICE, active_ap_op)
            props = dbus.Interface(active_ap, 'org.freedesktop.DBus.Properties')

            props.GetAll(_NM_ACCESSPOINT_IFACE, byte_arrays=True,
                         reply_handler=self.__get_all_ap_props_reply_cb,
                         error_handler=self.__get_all_ap_props_error_cb)

            self._bus.add_signal_receiver(self.__ap_properties_changed_cb,
                                          signal_name='PropertiesChanged',
                                          path=self._active_ap_op,
                                          dbus_interface=_NM_ACCESSPOINT_IFACE)

    def __get_active_ap_error_cb(self, err):
        logging.error('Error getting the active access point: %s', err)

    def __state_changed_cb(self, new_state, old_state, reason):
        self._device_state = new_state
        self._update_state()
        self._device_props.Get(_NM_WIRELESS_IFACE, 'ActiveAccessPoint',
                               reply_handler=self.__get_active_ap_reply_cb,
                               error_handler=self.__get_active_ap_error_cb)

    def __ap_properties_changed_cb(self, properties):
        self._update_properties(properties)

    def _name_encodes_colors(self):
        """Match #XXXXXX,#YYYYYY at the end of the network name"""
        return self._name[-7] == '#' and self._name[-8] == ',' \
            and self._name[-15] == '#'

    def _update_properties(self, properties):
        if 'Mode' in properties:
            self._mode = properties['Mode']
            self._color = None
        if 'Ssid' in properties:
            self._name = properties['Ssid']
            self._color = None
        if 'Strength' in properties:
            self._strength = properties['Strength']
        if 'Flags' in properties:
            self._flags = properties['Flags']
        if 'Frequency' in properties:
            self._frequency = properties['Frequency']

        if self._color == None:
            if self._mode == network.NM_802_11_MODE_ADHOC \
                    and self._name_encodes_colors():
                encoded_color = self._name.split("#", 1)
                if len(encoded_color) == 2:
                    self._color = xocolor.XoColor('#' + encoded_color[1])
            else:
                sha_hash = hashlib.sha1()
                data = self._name + hex(self._flags)
                sha_hash.update(data)
                digest = hash(sha_hash.digest())
                index = digest % len(xocolor.colors)

                self._color = xocolor.XoColor('%s,%s' % 
                                              (xocolor.colors[index][0],
                                               xocolor.colors[index][1]))
        self._update()

    def __get_all_ap_props_reply_cb(self, properties):
        self._update_properties(properties)

    def __get_all_ap_props_error_cb(self, err):
        logging.error('Error getting the access point properties: %s', err)

    def _update(self):
        if self._flags == network.NM_802_11_AP_FLAGS_PRIVACY:
            self._icon.props.badge_name = "emblem-locked"
        else:
            self._icon.props.badge_name = None

        self._palette.props.primary_text = self._name

        self._update_state()
        self._update_color()

    def _update_state(self):
        if self._active_ap_op is not None:
            state = self._device_state
        else:
            state = network.DEVICE_STATE_UNKNOWN

        if state == network.DEVICE_STATE_ACTIVATED:
            icon_name = '%s-connected' % self._ICON_NAME
        else:
            icon_name = self._ICON_NAME

        icon_name = get_icon_state(icon_name, self._strength)
        if icon_name:
            self._icon.props.icon_name = icon_name

        if state == network.DEVICE_STATE_PREPARE or \
           state == network.DEVICE_STATE_CONFIG or \
           state == network.DEVICE_STATE_NEED_AUTH or \
           state == network.DEVICE_STATE_IP_CONFIG:
            self._palette.set_connecting()
            self._icon.props.pulsing = True
        elif state == network.DEVICE_STATE_ACTIVATED:
            address = self._device_props.Get(_NM_DEVICE_IFACE, 'Ip4Address')
            self._palette.set_connected_with_frequency(self._frequency, address)
            self._icon.props.pulsing = False
        else:
            self._icon.props.badge_name = None
            self._icon.props.pulsing = False
            self._icon.props.pulse_color = self._inactive_color
            self._icon.props.base_color = self._inactive_color
            self._palette.set_disconnected()

    def _update_color(self):
        self._icon.props.base_color = self._color

    def __deactivate_connection_cb(self, palette, data=None):
        if self._active_ap_op is not None:
            obj = self._bus.get_object(_NM_SERVICE, _NM_PATH)
            netmgr = dbus.Interface(obj, _NM_IFACE)
            netmgr_props = dbus.Interface(
                netmgr, 'org.freedesktop.DBus.Properties')
            active_connections_o = netmgr_props.Get(_NM_IFACE,
                                                    'ActiveConnections')

            for conn_o in active_connections_o:
                obj = self._bus.get_object(_NM_IFACE, conn_o)
                props = dbus.Interface(obj, 'org.freedesktop.DBus.Properties')
                ap_op = props.Get(_NM_ACTIVE_CONN_IFACE, 'SpecificObject')
                if ap_op == self._active_ap_op:
                    netmgr.DeactivateConnection(conn_o)
                    break

    def __create_connection_cb(self, palette, data=None):
        """Create an 802.11 IBSS network.

        The user's color is encoded at the end of the network name. The network
        name is truncated so that it does not exceed the 32 byte SSID limit.
        """
        client = gconf.client_get_default()
        nick = client.get_string('/desktop/sugar/user/nick').decode('utf-8')
        color = client.get_string('/desktop/sugar/user/color')
        color_suffix = ' %s' % color

        format = _('%s\'s network').encode('utf-8')
        extra_length = (len(format) - len('%s')) + len(color_suffix)
        name_limit = 32 - extra_length

        # truncate the nick and use a regex to drop any partial characters
        # at the end
        nick = nick.encode('utf-8')[:name_limit]
        pattern = "([\xf6-\xf7][\x80-\xbf]{0,2}|[\xe0-\xef][\x80-\xbf]{0,1}|[\xc0-\xdf])$"
        nick = re.sub(pattern, '', nick)

        connection_name = format % nick
        connection_name += color_suffix

        connection = network.find_connection_by_ssid(connection_name)
        if connection is None:
            settings = Settings()
            settings.connection.id = 'Auto ' + connection_name
            uuid = settings.connection.uuid = unique_id()
            settings.connection.type = '802-11-wireless'
            settings.wireless.ssid = dbus.ByteArray(connection_name)
            settings.wireless.band = 'bg'
            settings.wireless.mode = 'adhoc'
            settings.ip4_config = IP4Config()
            settings.ip4_config.method = 'link-local'

            connection = network.add_connection(uuid, settings)

        obj = self._bus.get_object(_NM_SERVICE, _NM_PATH)
        netmgr = dbus.Interface(obj, _NM_IFACE)

        netmgr.ActivateConnection(network.SETTINGS_SERVICE,
                                  connection.path,
                                  self._device.object_path,
                                  '/',
                                  reply_handler=self.__activate_reply_cb,
                                  error_handler=self.__activate_error_cb)

    def __activate_reply_cb(self, connection):
        logging.debug('Network created: %s', connection)

    def __activate_error_cb(self, err):
        logging.debug('Failed to create network: %s', err)


class OlpcMeshDeviceView(ToolButton):
    _ICON_NAME = 'network-mesh'
    FRAME_POSITION_RELATIVE = 302

    def __init__(self, device):
        ToolButton.__init__(self)

        self._bus = dbus.SystemBus()
        self._device = device
        self._device_props = None
        self._device_state = None
        self._channel = 0

        self._icon = PulsingIcon(icon_name=self._ICON_NAME)
        self._icon.props.pulse_color = xocolor.XoColor( \
            "%s,%s" % (style.COLOR_BUTTON_GREY.get_svg(),
                       style.COLOR_TRANSPARENT.get_svg()))
        self._icon.props.base_color = profile.get_color()

        self.set_icon_widget(self._icon)
        self._icon.show()

        self.set_palette_invoker(FrameWidgetInvoker(self))
        self._palette = WirelessPalette(_("Mesh Network"))
        self._palette.connect('deactivate-connection',
                              self.__deactivate_connection)
        self.set_palette(self._palette)
        self._palette.set_group_id('frame')

        self._device_props = dbus.Interface(self._device,
                                            'org.freedesktop.DBus.Properties')
        self._device_props.GetAll(_NM_DEVICE_IFACE, byte_arrays=True,
                              reply_handler=self.__get_device_props_reply_cb,
                              error_handler=self.__get_device_props_error_cb)
        self._device_props.Get(_NM_OLPC_MESH_IFACE, 'ActiveChannel',
                            reply_handler=self.__get_active_channel_reply_cb,
                            error_handler=self.__get_active_channel_error_cb)

        self._bus.add_signal_receiver(self.__state_changed_cb,
                                      signal_name='StateChanged',
                                      path=self._device.object_path,
                                      dbus_interface=_NM_DEVICE_IFACE)
        self._bus.add_signal_receiver(self.__wireless_properties_changed_cb,
                                      signal_name='PropertiesChanged',
                                      path=device.object_path,
                                      dbus_interface=_NM_OLPC_MESH_IFACE)

    def disconnect(self):
        self._bus.remove_signal_receiver(self.__state_changed_cb,
                                         signal_name='StateChanged',
                                         path=self._device.object_path,
                                         dbus_interface=_NM_DEVICE_IFACE)
        self._bus.remove_signal_receiver(self.__wireless_properties_changed_cb,
                                         signal_name='PropertiesChanged',
                                         path=self._device.object_path,
                                         dbus_interface=_NM_OLPC_MESH_IFACE)

    def __get_device_props_reply_cb(self, properties):
        if 'State' in properties:
            self._device_state = properties['State']
            self._update()

    def __get_device_props_error_cb(self, err):
        logging.error('Error getting the device properties: %s', err)

    def __get_active_channel_reply_cb(self, channel):
        self._channel = channel
        self._update_text()

    def __get_active_channel_error_cb(self, err):
        logging.error('Error getting the active channel: %s', err)

    def __state_changed_cb(self, new_state, old_state, reason):
        self._device_state = new_state
        self._update()

    def __wireless_properties_changed_cb(self, properties):
        if 'ActiveChannel' in properties:
            self._channel = properties['ActiveChannel']
            self._update_text()

    def _update_text(self):
        text = _("Mesh Network") + " " + str(self._channel)
        self._palette.props.primary_text = text

    def _update(self):
        state = self._device_state

        if state in [network.DEVICE_STATE_PREPARE,
                     network.DEVICE_STATE_CONFIG,
                     network.DEVICE_STATE_NEED_AUTH,
                     network.DEVICE_STATE_IP_CONFIG]:
            self._palette.set_connecting()
            self._icon.props.pulsing = True
        elif state == network.DEVICE_STATE_ACTIVATED:
            address = self._device_props.Get(_NM_DEVICE_IFACE, 'Ip4Address')
            self._palette.set_connected_with_channel(self._channel, address)
            self._icon.props.pulsing = False

    def __deactivate_connection(self, palette, data=None):
        obj = self._bus.get_object(_NM_SERVICE, _NM_PATH)
        netmgr = dbus.Interface(obj, _NM_IFACE)
        netmgr_props = dbus.Interface(netmgr, 'org.freedesktop.DBus.Properties')
        active_connections_o = netmgr_props.Get(_NM_IFACE,
                                                'ActiveConnections')

        for conn_o in active_connections_o:
            # The connection path for a mesh connection is the device itself.
            obj = self._bus.get_object(_NM_IFACE, conn_o)
            props = dbus.Interface(obj, 'org.freedesktop.DBus.Properties')
            ap_op = props.Get(_NM_ACTIVE_CONN_IFACE, 'SpecificObject')

            try:
                obj = self._bus.get_object(_NM_IFACE, ap_op)
                props = dbus.Interface(obj, 'org.freedesktop.DBus.Properties')
                type = props.Get(_NM_DEVICE_IFACE, 'DeviceType')
                if type == network.DEVICE_TYPE_802_11_OLPC_MESH:
                    netmgr.DeactivateConnection(conn_o)
                    break
            except dbus.exceptions.DBusException:
                pass


class WiredDeviceView(TrayIcon):

    _ICON_NAME = 'network-wired'
    FRAME_POSITION_RELATIVE = 301

    def __init__(self, speed, address):
        client = gconf.client_get_default()
        color = xocolor.XoColor(client.get_string('/desktop/sugar/user/color'))

        TrayIcon.__init__(self, icon_name=self._ICON_NAME, xo_color=color)

        self.set_palette_invoker(FrameWidgetInvoker(self))
        self._palette = WiredPalette()
        self.set_palette(self._palette)
        self._palette.set_group_id('frame')
        self._palette.set_connected(speed, address)


class GsmDeviceView(TrayIcon):

    _ICON_NAME = 'gsm-device'
    FRAME_POSITION_RELATIVE = 303

    def __init__(self, device):
        self._connection_time_handler = None
        self._connection_timestamp = 0

        client = gconf.client_get_default()
        color = xocolor.XoColor(client.get_string('/desktop/sugar/user/color'))

        TrayIcon.__init__(self, icon_name=self._ICON_NAME, xo_color=color)

        self._bus = dbus.SystemBus()
        self._device = device
        self._palette = None
        self.set_palette_invoker(FrameWidgetInvoker(self))

        self._bus.add_signal_receiver(self.__state_changed_cb,
                                      signal_name='StateChanged',
                                      path=self._device.object_path,
                                      dbus_interface=_NM_DEVICE_IFACE)
        self._bus.add_signal_receiver(self.__ppp_stats_changed_cb,
                                      signal_name='PppStats',
                                      path=self._device.object_path,
                                      dbus_interface=_NM_SERIAL_IFACE)
    def create_palette(self):
        palette = GsmPalette()

        palette.set_group_id('frame')
        palette.connect('gsm-connect', self.__gsm_connect_cb)
        palette.connect('gsm-disconnect', self.__gsm_disconnect_cb)

        self._palette = palette

        props = dbus.Interface(self._device, 'org.freedesktop.DBus.Properties')
        props.GetAll(_NM_DEVICE_IFACE, byte_arrays=True,
                     reply_handler=self.__current_state_check_cb,
                     error_handler=self.__current_state_check_error_cb)

        return palette

    def __gsm_connect_cb(self, palette, data=None):
        connection = network.find_gsm_connection()
        if connection is not None:
            obj = self._bus.get_object(_NM_SERVICE, _NM_PATH)
            netmgr = dbus.Interface(obj, _NM_IFACE)
            netmgr.ActivateConnection(network.SETTINGS_SERVICE,
                                        connection.path,
                                        self._device.object_path,
                                        '/',
                                        reply_handler=self.__connect_cb,
                                        error_handler=self.__connect_error_cb)

    def __connect_cb(self, active_connection):
        logging.debug('Connected successfully to gsm device, %s',
                      active_connection)

    def __connect_error_cb(self, error):
        raise RuntimeError('Error when connecting to gsm device, %s' % error)

    def __gsm_disconnect_cb(self, palette, data=None):
        obj = self._bus.get_object(_NM_SERVICE, _NM_PATH)
        netmgr = dbus.Interface(obj, _NM_IFACE)
        netmgr_props = dbus.Interface(netmgr, 'org.freedesktop.DBus.Properties')
        active_connections_o = netmgr_props.Get(_NM_IFACE, 'ActiveConnections')

        for conn_o in active_connections_o:
            obj = self._bus.get_object(_NM_IFACE, conn_o)
            props = dbus.Interface(obj, 'org.freedesktop.DBus.Properties')
            devices = props.Get(_NM_ACTIVE_CONN_IFACE, 'Devices')
            if self._device.object_path in devices:
                netmgr.DeactivateConnection(
                        conn_o,
                        reply_handler=self.__disconnect_cb,
                        error_handler=self.__disconnect_error_cb)
                break

    def __disconnect_cb(self):
        logging.debug('Disconnected successfully gsm device')

    def __disconnect_error_cb(self, error):
        raise RuntimeError('Error when disconnecting gsm device, %s' % error)

    def __state_changed_cb(self, new_state, old_state, reason):
        self._update_state(int(new_state))

    def __current_state_check_cb(self, properties):
        self._update_state(int(properties['State']))

    def __current_state_check_error_cb(self, error):
        raise RuntimeError('Error when checking gsm device state, %s' % error)

    def _update_state(self, state):
        gsm_state = None

        if state is network.DEVICE_STATE_ACTIVATED:
            gsm_state = _GSM_STATE_CONNECTED
            connection = network.find_gsm_connection()
            if connection is not None:
                connection.set_connected()
                self._connection_timestamp =  time.time() - \
                        connection.get_settings().connection.timestamp
                self._connection_time_handler = gobject.timeout_add( \
                        1000, self.__connection_timecount_cb)
                self._update_stats(0, 0)
                self._update_connection_time()                
                self._palette.info_box.show() 

        if state is network.DEVICE_STATE_DISCONNECTED:
            gsm_state = _GSM_STATE_DISCONNECTED
            self._connection_timestamp = 0
            if self._connection_time_handler is not None:
                gobject.source_remove(self._connection_time_handler)
            self._palette.info_box.hide() 

        elif state in [network.DEVICE_STATE_UNMANAGED,
                       network.DEVICE_STATE_UNAVAILABLE,
                       network.DEVICE_STATE_UNKNOWN]:
            gsm_state = _GSM_STATE_NOT_READY

        elif state in [network.DEVICE_STATE_PREPARE,
                       network.DEVICE_STATE_CONFIG,
                       network.DEVICE_STATE_IP_CONFIG]:
            gsm_state = _GSM_STATE_CONNECTING

        if self._palette is not None:
            self._palette.set_state(gsm_state)

    def disconnect(self):
        self._bus.remove_signal_receiver(self.__state_changed_cb,
                                         signal_name='StateChanged',
                                         path=self._device.object_path,
                                         dbus_interface=_NM_DEVICE_IFACE)

    def __ppp_stats_changed_cb(self, in_bytes, out_bytes):
        self._update_stats(in_bytes, out_bytes)

    def _update_stats(self, in_bytes, out_bytes):
        in_kbytes = in_bytes / 1024
        out_kbytes = out_bytes / 1024
        text = _("Data sent %d kb / received %d kb") % (out_kbytes, in_kbytes)
        self._palette.data_label.set_text(text)

    def __connection_timecount_cb(self):
        self._connection_timestamp = self._connection_timestamp + 1
        self._update_connectiontime()
        return True

    def _update_connection_time(self):
        connection_time = datetime.datetime.fromtimestamp( \
                self._connection_timestamp)
        text = _("Connection time ") + connection_time.strftime('%H : %M : %S')
        self._palette.connection_time_label.set_text(text)

class WirelessDeviceObserver(object):
    def __init__(self, device, tray, device_type):
        self._device = device
        self._device_view = None
        self._tray = tray

        if device_type == network.DEVICE_TYPE_802_11_WIRELESS:
            self._device_view = WirelessDeviceView(self._device)
        elif device_type == network.DEVICE_TYPE_802_11_OLPC_MESH:
            self._device_view = OlpcMeshDeviceView(self._device)
        else:
            raise ValueError('Unimplemented device type %d' % device_type)

        self._tray.add_device(self._device_view)

    def disconnect(self):
        self._device_view.disconnect()
        self._tray.remove_device(self._device_view)
        del self._device_view
        self._device_view = None


class WiredDeviceObserver(object):
    def __init__(self, device, tray):
        self._bus = dbus.SystemBus()
        self._device = device
        self._device_state = None
        self._device_view = None
        self._tray = tray

        props = dbus.Interface(self._device, 'org.freedesktop.DBus.Properties')
        props.GetAll(_NM_DEVICE_IFACE, byte_arrays=True,
                     reply_handler=self.__get_device_props_reply_cb,
                     error_handler=self.__get_device_props_error_cb)

        self._bus.add_signal_receiver(self.__state_changed_cb,
                                      signal_name='StateChanged',
                                      path=self._device.object_path,
                                      dbus_interface=_NM_DEVICE_IFACE)

    def disconnect(self):
        self._bus.remove_signal_receiver(self.__state_changed_cb,
                                         signal_name='StateChanged',
                                         path=self._device.object_path,
                                         dbus_interface=_NM_DEVICE_IFACE)

    def __get_device_props_reply_cb(self, properties):
        if 'State' in properties:
            self._update_state(properties['State'])

    def __get_device_props_error_cb(self, err):
        logging.error('Error getting the device properties: %s', err)

    def __state_changed_cb(self, new_state, old_state, reason):
        self._update_state(new_state)

    def _update_state(self, state):
        if state == network.DEVICE_STATE_ACTIVATED:
            props = dbus.Interface(self._device,
                                   'org.freedesktop.DBus.Properties')
            address = props.Get(_NM_DEVICE_IFACE, 'Ip4Address')
            speed = props.Get(_NM_WIRED_IFACE, 'Speed')
            self._device_view = WiredDeviceView(speed, address)
            self._tray.add_device(self._device_view)
        else:
            if self._device_view is not None:
                self._tray.remove_device(self._device_view)
                del self._device_view
                self._device_view = None

class GsmDeviceObserver(object):
    def __init__(self, device, tray):
        self._device = device
        self._device_view = None
        self._tray = tray

        self._device_view = GsmDeviceView(device)
        self._tray.add_device(self._device_view)

    def disconnect(self):
        self._device_view.disconnect()
        self._tray.remove_device(self._device_view)
        self._device_view = None

class NetworkManagerObserver(object):
    def __init__(self, tray):
        self._bus = dbus.SystemBus()
        self._devices = {}
        self._netmgr = None
        self._tray = tray

        try:
            obj = self._bus.get_object(_NM_SERVICE, _NM_PATH)
            self._netmgr = dbus.Interface(obj, _NM_IFACE)
        except dbus.DBusException:
            logging.error('%s service not available', _NM_SERVICE)
            return

        self._netmgr.GetDevices(reply_handler=self.__get_devices_reply_cb,
                                error_handler=self.__get_devices_error_cb)

        self._bus.add_signal_receiver(self.__device_added_cb,
                                      signal_name='DeviceAdded',
                                      dbus_interface=_NM_IFACE)
        self._bus.add_signal_receiver(self.__device_removed_cb,
                                      signal_name='DeviceRemoved',
                                      dbus_interface=_NM_IFACE)

    def __get_devices_reply_cb(self, devices):
        for device_op in devices:
            self._check_device(device_op)

    def __get_devices_error_cb(self, err):
        logging.error('Failed to get devices: %s', err)

    def _check_device(self, device_op):
        nm_device = self._bus.get_object(_NM_SERVICE, device_op)
        props = dbus.Interface(nm_device, 'org.freedesktop.DBus.Properties')

        device_type = props.Get(_NM_DEVICE_IFACE, 'DeviceType')
        if device_type == network.DEVICE_TYPE_802_3_ETHERNET:
            device = WiredDeviceObserver(nm_device, self._tray)
            self._devices[device_op] = device
        elif device_type in [network.DEVICE_TYPE_802_11_WIRELESS,
                             network.DEVICE_TYPE_802_11_OLPC_MESH]:
            device = WirelessDeviceObserver(nm_device, self._tray, device_type)
            self._devices[device_op] = device
        elif device_type == network.DEVICE_TYPE_GSM_MODEM:
            device = GsmDeviceObserver(nm_device, self._tray)
            self._devices[device_op] = device

    def __device_added_cb(self, device_op):
        self._check_device(device_op)

    def __device_removed_cb(self, device_op):
        if device_op in self._devices:
            device = self._devices[device_op]
            device.disconnect()
            del self._devices[device_op]

def setup(tray):
    device_observer = NetworkManagerObserver(tray)