/usr/share/pyshared/jarabe/model/adhoc.py is in python-jarabe-0.96 0.96.1-2.1git1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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#
# 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
import logging
import dbus
import gobject
from jarabe.model import network
from jarabe.model.network import Settings
from sugar.util import unique_id
from jarabe.model.network import IP4Config
_adhoc_manager_instance = None
def get_adhoc_manager_instance():
global _adhoc_manager_instance
if _adhoc_manager_instance is None:
_adhoc_manager_instance = AdHocManager()
return _adhoc_manager_instance
class AdHocManager(gobject.GObject):
"""To mimic the mesh behavior on devices where mesh hardware is
not available we support the creation of an Ad-hoc network on
three channels 1, 6, 11. If Sugar sees no "known" network when it
starts, it does autoconnect to an Ad-hoc network.
"""
__gsignals__ = {
'members-changed': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
([gobject.TYPE_PYOBJECT, gobject.TYPE_PYOBJECT])),
'state-changed': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
([gobject.TYPE_PYOBJECT, gobject.TYPE_PYOBJECT])),
}
_AUTOCONNECT_TIMEOUT = 60
_CHANNEL_1 = 1
_CHANNEL_6 = 6
_CHANNEL_11 = 11
def __init__(self):
gobject.GObject.__init__(self)
self._bus = dbus.SystemBus()
self._device = None
self._idle_source = 0
self._listening_called = 0
self._device_state = network.NM_DEVICE_STATE_UNKNOWN
self._current_channel = None
self._networks = {self._CHANNEL_1: None,
self._CHANNEL_6: None,
self._CHANNEL_11: None}
for channel in (self._CHANNEL_1, self._CHANNEL_6, self._CHANNEL_11):
if not self._find_connection(channel):
self._add_connection(channel)
def start_listening(self, device):
self._listening_called += 1
if self._listening_called > 1:
raise RuntimeError('The start listening method can' \
' only be called once.')
self._device = device
props = dbus.Interface(device, dbus.PROPERTIES_IFACE)
self._device_state = props.Get(network.NM_DEVICE_IFACE, 'State')
self._bus.add_signal_receiver(self.__device_state_changed_cb,
signal_name='StateChanged',
path=self._device.object_path,
dbus_interface=network.NM_DEVICE_IFACE)
self._bus.add_signal_receiver(self.__wireless_properties_changed_cb,
signal_name='PropertiesChanged',
path=self._device.object_path,
dbus_interface=network.NM_WIRELESS_IFACE)
def stop_listening(self):
self._listening_called = 0
self._bus.remove_signal_receiver(self.__device_state_changed_cb,
signal_name='StateChanged',
path=self._device.object_path,
dbus_interface=network.NM_DEVICE_IFACE)
self._bus.remove_signal_receiver(self.__wireless_properties_changed_cb,
signal_name='PropertiesChanged',
path=self._device.object_path,
dbus_interface=network.NM_WIRELESS_IFACE)
def __device_state_changed_cb(self, new_state, old_state, reason):
self._device_state = new_state
self._update_state()
def __wireless_properties_changed_cb(self, properties):
if 'ActiveAccessPoint' in properties and \
properties['ActiveAccessPoint'] != '/':
active_ap = self._bus.get_object(network.NM_SERVICE,
properties['ActiveAccessPoint'])
props = dbus.Interface(active_ap, dbus.PROPERTIES_IFACE)
props.GetAll(network.NM_ACCESSPOINT_IFACE, byte_arrays=True,
reply_handler=self.__get_all_ap_props_reply_cb,
error_handler=self.__get_all_ap_props_error_cb)
def __get_all_ap_props_reply_cb(self, properties):
if properties['Mode'] == network.NM_802_11_MODE_ADHOC and \
'Frequency' in properties:
frequency = properties['Frequency']
self._current_channel = network.frequency_to_channel(frequency)
else:
self._current_channel = None
self._update_state()
def __get_all_ap_props_error_cb(self, err):
logging.error('Error getting the access point properties: %s', err)
def _update_state(self):
self.emit('state-changed', self._current_channel, self._device_state)
def autoconnect(self):
"""Start a timer which basically looks for 30 seconds of inactivity
on the device, then does autoconnect to an Ad-hoc network.
This function may be called early on (e.g. when the device is still
in NM_DEVICE_STATE_UNMANAGED). It is assumed that initialisation
will complete quickly, and long before the timeout ticks.
"""
if self._idle_source != 0:
gobject.source_remove(self._idle_source)
self._idle_source = gobject.timeout_add_seconds(
self._AUTOCONNECT_TIMEOUT, self.__idle_check_cb)
def __idle_check_cb(self):
if self._device_state == network.NM_DEVICE_STATE_DISCONNECTED:
logging.debug('Connect to Ad-hoc network due to inactivity.')
self._autoconnect_adhoc()
else:
logging.debug('autoconnect Sugar Ad-hoc: already connected')
return False
def _autoconnect_adhoc(self):
"""First we try if there is an Ad-hoc network that is used by other
learners in the area, if not we default to channel 1.
"""
if self._networks[self._CHANNEL_1] is not None:
self.activate_channel(self._CHANNEL_1)
elif self._networks[self._CHANNEL_6] is not None:
self.activate_channel(self._CHANNEL_6)
elif self._networks[self._CHANNEL_11] is not None:
self.activate_channel(self._CHANNEL_11)
else:
self.activate_channel(self._CHANNEL_1)
def activate_channel(self, channel):
"""Activate a sugar Ad-hoc network.
Keyword arguments:
channel -- Channel to connect to (should be 1, 6, 11)
"""
connection = self._find_connection(channel)
if connection:
connection.activate(self._device.object_path)
@staticmethod
def _get_connection_id(channel):
return '%s%d' % (network.ADHOC_CONNECTION_ID_PREFIX, channel)
def _add_connection(self, channel):
ssid = 'Ad-hoc Network %d' % (channel,)
settings = Settings()
settings.connection.id = self._get_connection_id(channel)
settings.connection.uuid = unique_id()
settings.connection.type = '802-11-wireless'
settings.connection.autoconnect = False
settings.wireless.ssid = dbus.ByteArray(ssid)
settings.wireless.band = 'bg'
settings.wireless.channel = channel
settings.wireless.mode = 'adhoc'
settings.ip4_config = IP4Config()
settings.ip4_config.method = 'link-local'
network.add_connection(settings)
def _find_connection(self, channel):
connection_id = self._get_connection_id(channel)
return network.find_connection_by_id(connection_id)
def deactivate_active_channel(self):
"""Deactivate the current active channel."""
obj = self._bus.get_object(network.NM_SERVICE, network.NM_PATH)
netmgr = dbus.Interface(obj, network.NM_IFACE)
netmgr_props = dbus.Interface(netmgr, dbus.PROPERTIES_IFACE)
netmgr_props.Get(network.NM_IFACE, 'ActiveConnections', \
reply_handler=self.__get_active_connections_reply_cb,
error_handler=self.__get_active_connections_error_cb)
def __get_active_connections_reply_cb(self, active_connections_o):
for connection_o in active_connections_o:
obj = self._bus.get_object(network.NM_IFACE, connection_o)
props = dbus.Interface(obj, dbus.PROPERTIES_IFACE)
state = props.Get(network.NM_ACTIVE_CONN_IFACE, 'State')
if state == network.NM_ACTIVE_CONNECTION_STATE_ACTIVATED:
access_point_o = props.Get(network.NM_ACTIVE_CONN_IFACE,
'SpecificObject')
if access_point_o != '/':
obj = self._bus.get_object(network.NM_SERVICE, network.NM_PATH)
netmgr = dbus.Interface(obj, network.NM_IFACE)
netmgr.DeactivateConnection(connection_o)
def __get_active_connections_error_cb(self, err):
logging.error('Error getting the active connections: %s', err)
def __activate_reply_cb(self, connection):
logging.debug('Ad-hoc network created: %s', connection)
def __activate_error_cb(self, err):
logging.error('Failed to create Ad-hoc network: %s', err)
def add_access_point(self, access_point):
"""Add an access point to a network and notify the view to idicate
the member change.
Keyword arguments:
access_point -- Access Point
"""
if access_point.ssid.endswith(' 1'):
self._networks[self._CHANNEL_1] = access_point
self.emit('members-changed', self._CHANNEL_1, True)
elif access_point.ssid.endswith(' 6'):
self._networks[self._CHANNEL_6] = access_point
self.emit('members-changed', self._CHANNEL_6, True)
elif access_point.ssid.endswith('11'):
self._networks[self._CHANNEL_11] = access_point
self.emit('members-changed', self._CHANNEL_11, True)
def is_sugar_adhoc_access_point(self, ap_object_path):
"""Checks whether an access point is part of a sugar Ad-hoc network.
Keyword arguments:
ap_object_path -- Access Point object path
Return: Boolean
"""
for access_point in self._networks.values():
if access_point is not None:
if access_point.model.object_path == ap_object_path:
return True
return False
def remove_access_point(self, ap_object_path):
"""Remove an access point from a sugar Ad-hoc network.
Keyword arguments:
ap_object_path -- Access Point object path
"""
for channel in self._networks:
if self._networks[channel] is not None:
if self._networks[channel].model.object_path == ap_object_path:
self.emit('members-changed', channel, False)
self._networks[channel] = None
break
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