# Copyright (C) 2007, Red Hat, Inc. # # 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 _logger = logging.getLogger('s-p-s.psutils') NM_SERVICE = 'org.freedesktop.NetworkManager' NM_IFACE = 'org.freedesktop.NetworkManager' NM_IFACE_DEVICES = 'org.freedesktop.NetworkManager.Devices' NM_PATH = '/org/freedesktop/NetworkManager' _ip4am = None class IP4AddressMonitor(gobject.GObject): """This class, and direct buddy IPv4 address access, will go away quite soon""" __gsignals__ = { 'address-changed': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE, ([gobject.TYPE_PYOBJECT])) } __gproperties__ = { 'address' : (str, None, None, None, gobject.PARAM_READABLE) } def get_instance(): """Retrieve (or create) the IP4Address monitor singleton instance""" global _ip4am if not _ip4am: _ip4am = IP4AddressMonitor() return _ip4am get_instance = staticmethod(get_instance) def __init__(self): gobject.GObject.__init__(self) self._nm_present = False self._nm_has_been_present = False self._matches = [] self._addr = None self._nm_obj = None sys_bus = dbus.SystemBus() self._watch = sys_bus.watch_name_owner(NM_SERVICE, self._nm_owner_cb) if not sys_bus.name_has_owner(NM_SERVICE): addr = self._get_address_fallback() self._update_address(addr) def do_get_property(self, pspec): if pspec.name == "address": return self._addr def _update_address(self, new_addr): if new_addr == "0.0.0.0": new_addr = None if new_addr == self._addr: return self._addr = new_addr _logger.debug("IP4 address now '%s'" % new_addr) self.emit('address-changed', new_addr) def _connect_to_nm(self): """Connect to NM device state signals to tell when the IPv4 address changes""" try: sys_bus = dbus.SystemBus() proxy = sys_bus.get_object(NM_SERVICE, NM_PATH) self._nm_obj = dbus.Interface(proxy, NM_IFACE) except dbus.DBusException, err: _logger.debug("Error finding NetworkManager: %s" % err) self._nm_present = False return sys_bus = dbus.SystemBus() match = sys_bus.add_signal_receiver(self._nm_device_active_cb, signal_name="DeviceNowActive", dbus_interface=NM_IFACE) self._matches.append(match) match = sys_bus.add_signal_receiver(self._nm_device_no_longer_active_cb, signal_name="DeviceNoLongerActive", dbus_interface=NM_IFACE, bus_name=NM_SERVICE) self._matches.append(match) match = sys_bus.add_signal_receiver(self._nm_state_change_cb, signal_name="StateChange", dbus_interface=NM_IFACE, bus_name=NM_SERVICE) self._matches.append(match) state = self._nm_obj.state() if state == 3: # NM_STATE_CONNECTED self._query_devices() def _device_properties_cb(self, *props): active = props[4] if not active: return act_stage = props[5] # HACK: OLPC NM has an extra stage, so activated == 8 on OLPC # but 7 everywhere else if act_stage != 8 and act_stage != 7: # not activated return self._update_address(props[6]) def _device_properties_error_cb(self, err): _logger.debug("Error querying device properties: %s" % err) def _query_device_properties(self, device): sys_bus = dbus.SystemBus() proxy = sys_bus.get_object(NM_SERVICE, device) dev = dbus.Interface(proxy, NM_IFACE_DEVICES) dev.getProperties(reply_handler=self._device_properties_cb, error_handler=self._device_properties_error_cb) def _get_devices_cb(self, ops): """Query each device's properties""" for op in ops: self._query_device_properties(op) def _get_devices_error_cb(self, err): _logger.debug("Error getting NetworkManager devices: %s" % err) def _query_devices(self): """Query NM for a list of network devices""" self._nm_obj.getDevices(reply_handler=self._get_devices_cb, error_handler=self._get_devices_error_cb) def _nm_device_active_cb(self, device, ssid=None): self._query_device_properties(device) def _nm_device_no_longer_active_cb(self, device): self._update_address(None) def _nm_state_change_cb(self, new_state): if new_state == 4: # NM_STATE_DISCONNECTED self._update_address(None) def _nm_owner_cb(self, unique_name): """Clear state when NM goes away""" if unique_name == '': # NM went away, or isn't there at all self._nm_present = False for match in self._matches: match.remove() self._matches = [] if self._nm_has_been_present: self._update_address(None) else: addr = self._get_address_fallback() self._update_address(addr) elif not self._nm_present: # NM started up self._nm_present = True self._nm_has_been_present = True self._connect_to_nm() def _get_iface_address(self, iface): import socket import fcntl import struct s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) fd = s.fileno() SIOCGIFADDR = 0x8915 addr = fcntl.ioctl(fd, SIOCGIFADDR, struct.pack('256s', iface[:15]))[20:24] s.close() return socket.inet_ntoa(addr) def _get_address_fallback(self): import commands (s, o) = commands.getstatusoutput("/sbin/route -n") if s != 0: return for line in o.split('\n'): fields = line.split(" ") if fields[0] == "0.0.0.0": iface = fields[len(fields) - 1] return self._get_iface_address(iface) return None