NetworkManager/libnm-glib/nm-device.c

/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */
/*
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301 USA.
 *
 * Copyright 2007 - 2008 Novell, Inc.
 * Copyright 2007 - 2012 Red Hat, Inc.
 */

#include <string.h>

#include <glib/gi18n.h>
#include <gudev/gudev.h>

#include "NetworkManager.h"
#include "nm-device-ethernet.h"
#include "nm-device-adsl.h"
#include "nm-device-wifi.h"
#include "nm-device-modem.h"
#include "nm-device-bt.h"
#include "nm-device-olpc-mesh.h"
#include "nm-device-wimax.h"
#include "nm-device-infiniband.h"
#include "nm-device-bond.h"
#include "nm-device-team.h"
#include "nm-device-bridge.h"
#include "nm-device-vlan.h"
#include "nm-device-generic.h"
#include "nm-device.h"
#include "nm-device-private.h"
#include "nm-object-private.h"
#include "nm-object-cache.h"
#include "nm-remote-connection.h"
#include "nm-types.h"
#include "nm-dbus-glib-types.h"
#include "nm-glib-compat.h"
#include "nm-utils.h"
#include "nm-dbus-helpers-private.h"

static GType _nm_device_type_for_path (DBusGConnection *connection,
                                       const char *path);
static void _nm_device_type_for_path_async (DBusGConnection *connection,
                                            const char *path,
                                            NMObjectTypeCallbackFunc callback,
                                            gpointer user_data);
gboolean connection_compatible (NMDevice *device, NMConnection *connection, GError **error);

G_DEFINE_TYPE_WITH_CODE (NMDevice, nm_device, NM_TYPE_OBJECT,
                         _nm_object_register_type_func (g_define_type_id, _nm_device_type_for_path,
                                                        _nm_device_type_for_path_async);
                         )

#define DBUS_G_TYPE_UINT_STRUCT (dbus_g_type_get_struct ("GValueArray", G_TYPE_UINT, G_TYPE_UINT, G_TYPE_INVALID))

#define NM_DEVICE_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), NM_TYPE_DEVICE, NMDevicePrivate))

typedef struct {
	DBusGProxy *proxy;

	char *iface;
	char *ip_iface;
	NMDeviceType device_type;
	char *udi;
	char *driver;
	char *driver_version;
	char *firmware_version;
	char *type_description;
	NMDeviceCapabilities capabilities;
	gboolean managed;
	gboolean firmware_missing;
	gboolean autoconnect;
	NMIP4Config *ip4_config;
	NMDHCP4Config *dhcp4_config;
	NMIP6Config *ip6_config;
	NMDHCP6Config *dhcp6_config;
	NMDeviceState state;
	NMDeviceState last_seen_state;
	NMDeviceStateReason reason;

	NMActiveConnection *active_connection;
	GPtrArray *available_connections;

	GUdevClient *client;
	char *product, *short_product;
	char *vendor, *short_vendor;
	char *description, *bus_name;

	char *physical_port_id;
	guint32 mtu;
} NMDevicePrivate;

enum {
	PROP_0,
	PROP_INTERFACE,
	PROP_UDI,
	PROP_DRIVER,
	PROP_DRIVER_VERSION,
	PROP_FIRMWARE_VERSION,
	PROP_CAPABILITIES,
	PROP_MANAGED,
	PROP_AUTOCONNECT,
	PROP_FIRMWARE_MISSING,
	PROP_IP4_CONFIG,
	PROP_DHCP4_CONFIG,
	PROP_IP6_CONFIG,
	PROP_STATE,
	PROP_STATE_REASON,
	PROP_PRODUCT,
	PROP_VENDOR,
	PROP_DHCP6_CONFIG,
	PROP_IP_INTERFACE,
	PROP_DEVICE_TYPE,
	PROP_ACTIVE_CONNECTION,
	PROP_AVAILABLE_CONNECTIONS,
	PROP_PHYSICAL_PORT_ID,
	PROP_MTU,

	LAST_PROP
};

enum {
	STATE_CHANGED,

	LAST_SIGNAL
};

static guint signals[LAST_SIGNAL] = { 0 };

/**
 * nm_device_error_quark:
 *
 * Registers an error quark for #NMDevice if necessary.
 *
 * Returns: the error quark used for #NMDevice errors.
 *
 * Since: 0.9.10
 **/
GQuark
nm_device_error_quark (void)
{
	static GQuark quark = 0;

	if (G_UNLIKELY (quark == 0))
		quark = g_quark_from_static_string ("nm-device-error-quark");
	return quark;
}

static void
nm_device_init (NMDevice *device)
{
	NMDevicePrivate *priv = NM_DEVICE_GET_PRIVATE (device);

	priv->state = NM_DEVICE_STATE_UNKNOWN;
	priv->reason = NM_DEVICE_STATE_REASON_NONE;
}

static gboolean
demarshal_state_reason (NMObject *object, GParamSpec *pspec, GValue *value, gpointer field)
{
	NMDevicePrivate *priv = NM_DEVICE_GET_PRIVATE (object);

	if (!G_VALUE_HOLDS (value, DBUS_G_TYPE_UINT_STRUCT))
		return FALSE;

	dbus_g_type_struct_get (value,
	                        0, &priv->state,
	                        1, &priv->reason,
	                        G_MAXUINT);

	_nm_object_queue_notify (object, NM_DEVICE_STATE_REASON);
	return TRUE;
}

static void
register_properties (NMDevice *device)
{
	NMDevicePrivate *priv = NM_DEVICE_GET_PRIVATE (device);
	const NMPropertiesInfo property_info[] = {
		{ NM_DEVICE_UDI,               &priv->udi },
		{ NM_DEVICE_INTERFACE,         &priv->iface },
		{ NM_DEVICE_IP_INTERFACE,      &priv->ip_iface },
		{ NM_DEVICE_DRIVER,            &priv->driver },
		{ NM_DEVICE_DRIVER_VERSION,    &priv->driver_version },
		{ NM_DEVICE_FIRMWARE_VERSION,  &priv->firmware_version },
		{ NM_DEVICE_CAPABILITIES,      &priv->capabilities },
		{ NM_DEVICE_MANAGED,           &priv->managed },
		{ NM_DEVICE_AUTOCONNECT,       &priv->autoconnect },
		{ NM_DEVICE_FIRMWARE_MISSING,  &priv->firmware_missing },
		{ NM_DEVICE_IP4_CONFIG,        &priv->ip4_config, NULL, NM_TYPE_IP4_CONFIG },
		{ NM_DEVICE_DHCP4_CONFIG,      &priv->dhcp4_config, NULL, NM_TYPE_DHCP4_CONFIG },
		{ NM_DEVICE_IP6_CONFIG,        &priv->ip6_config, NULL, NM_TYPE_IP6_CONFIG },
		{ NM_DEVICE_DHCP6_CONFIG,      &priv->dhcp6_config, NULL, NM_TYPE_DHCP6_CONFIG },
		{ NM_DEVICE_STATE,             &priv->state },
		{ NM_DEVICE_STATE_REASON,      &priv->state, demarshal_state_reason },
		{ NM_DEVICE_ACTIVE_CONNECTION, &priv->active_connection, NULL, NM_TYPE_ACTIVE_CONNECTION },
		{ NM_DEVICE_AVAILABLE_CONNECTIONS, &priv->available_connections, NULL, NM_TYPE_REMOTE_CONNECTION },
		{ NM_DEVICE_PHYSICAL_PORT_ID,  &priv->physical_port_id },
		{ NM_DEVICE_MTU,               &priv->mtu },

		/* Properties that exist in D-Bus but that we don't track */
		{ "ip4-address", NULL },
		{ "device-type", NULL },

		{ NULL },
	};

	_nm_object_register_properties (NM_OBJECT (device),
	                                priv->proxy,
	                                property_info);
}

typedef struct {
	NMDeviceState old_state;
	NMDeviceState new_state;
	NMDeviceStateReason reason;
} StateChangeData;

static void
device_state_change_reloaded (GObject *object,
                              GAsyncResult *result,
                              gpointer user_data)
{
	NMDevice *self = NM_DEVICE (object);
	NMDevicePrivate *priv = NM_DEVICE_GET_PRIVATE (self);
	StateChangeData *data = user_data;
	NMDeviceState old_state = data->old_state;
	NMDeviceState new_state = data->new_state;
	NMDeviceStateReason reason = data->reason;

	g_slice_free (StateChangeData, data);

	_nm_object_reload_properties_finish (NM_OBJECT (object), result, NULL);

	/* If the device changes state several times in rapid succession, then we'll
	 * queue several reload_properties() calls, and there's no guarantee that
	 * they'll finish in the right order. In that case, only emit the signal
	 * for the last one.
	 */
	if (priv->last_seen_state != new_state)
		return;

	/* Ensure that nm_device_get_state() will return the right value even if
	 * we haven't processed the corresponding PropertiesChanged yet.
	 */
	priv->state = new_state;

	g_signal_emit (self, signals[STATE_CHANGED], 0,
	               new_state, old_state, reason);
}

static void
device_state_changed (DBusGProxy *proxy,
                      NMDeviceState new_state,
                      NMDeviceState old_state,
                      NMDeviceStateReason reason,
                      gpointer user_data)
{
	NMDevice *self = NM_DEVICE (user_data);
	NMDevicePrivate *priv = NM_DEVICE_GET_PRIVATE (self);

	if (old_state != new_state) {
		StateChangeData *data;

		/* Our object-valued properties (eg, ip4_config) will still
		 * have their old values at this point, because NMObject is
		 * in the process of asynchronously reading the new values.
		 * Wait for that to finish before emitting the signal.
		 */
		priv->last_seen_state = new_state;

		data = g_slice_new (StateChangeData);
		data->old_state = old_state;
		data->new_state = new_state;
		data->reason = reason;
		_nm_object_reload_properties_async (NM_OBJECT (user_data),
		                                    device_state_change_reloaded,
		                                    data);
	}
}

static GType
_nm_device_gtype_from_dtype (NMDeviceType dtype)
{
	switch (dtype) {
	case NM_DEVICE_TYPE_ETHERNET:
		return NM_TYPE_DEVICE_ETHERNET;
	case NM_DEVICE_TYPE_WIFI:
		return NM_TYPE_DEVICE_WIFI;
	case NM_DEVICE_TYPE_MODEM:
		return NM_TYPE_DEVICE_MODEM;
	case NM_DEVICE_TYPE_BT:
		return NM_TYPE_DEVICE_BT;
	case NM_DEVICE_TYPE_ADSL:
		return NM_TYPE_DEVICE_ADSL;
	case NM_DEVICE_TYPE_OLPC_MESH:
		return NM_TYPE_DEVICE_OLPC_MESH;
	case NM_DEVICE_TYPE_WIMAX:
		return NM_TYPE_DEVICE_WIMAX;
	case NM_DEVICE_TYPE_INFINIBAND:
		return NM_TYPE_DEVICE_INFINIBAND;
	case NM_DEVICE_TYPE_BOND:
		return NM_TYPE_DEVICE_BOND;
	case NM_DEVICE_TYPE_TEAM:
		return NM_TYPE_DEVICE_TEAM;
	case NM_DEVICE_TYPE_BRIDGE:
		return NM_TYPE_DEVICE_BRIDGE;
	case NM_DEVICE_TYPE_VLAN:
		return NM_TYPE_DEVICE_VLAN;
	case NM_DEVICE_TYPE_GENERIC:
		return NM_TYPE_DEVICE_GENERIC;
	default:
		g_warning ("Unknown device type %d", dtype);
		return G_TYPE_INVALID;
	}
}

static void
constructed (GObject *object)
{
	NMDevicePrivate *priv;

	G_OBJECT_CLASS (nm_device_parent_class)->constructed (object);

	priv = NM_DEVICE_GET_PRIVATE (object);
	/* Catch failure of subclasses to call _nm_device_set_device_type() */
	g_warn_if_fail (priv->device_type != NM_DEVICE_TYPE_UNKNOWN);
	/* Catch a subclass setting the wrong type */
	g_warn_if_fail (G_OBJECT_TYPE (object) == _nm_device_gtype_from_dtype (priv->device_type));

	priv->proxy = _nm_object_new_proxy (NM_OBJECT (object), NULL, NM_DBUS_INTERFACE_DEVICE);

	register_properties (NM_DEVICE (object));

	dbus_g_object_register_marshaller (g_cclosure_marshal_generic,
									   G_TYPE_NONE,
									   G_TYPE_UINT, G_TYPE_UINT, G_TYPE_UINT,
									   G_TYPE_INVALID);

	dbus_g_proxy_add_signal (priv->proxy,
	                         "StateChanged",
	                         G_TYPE_UINT, G_TYPE_UINT, G_TYPE_UINT,
	                         G_TYPE_INVALID);

	dbus_g_proxy_connect_signal (priv->proxy, "StateChanged",
								 G_CALLBACK (device_state_changed),
								 NM_DEVICE (object),
								 NULL);
}

static void
dispose (GObject *object)
{
	NMDevicePrivate *priv = NM_DEVICE_GET_PRIVATE (object);

	g_clear_object (&priv->proxy);
	g_clear_object (&priv->ip4_config);
	g_clear_object (&priv->dhcp4_config);
	g_clear_object (&priv->ip6_config);
	g_clear_object (&priv->dhcp6_config);
	g_clear_object (&priv->client);
	g_clear_object (&priv->active_connection);

	if (priv->available_connections) {
		int i;

		for (i = 0; i < priv->available_connections->len; i++)
			g_object_unref (priv->available_connections->pdata[i]);
		g_ptr_array_free (priv->available_connections, TRUE);
		priv->available_connections = NULL;
	}

	G_OBJECT_CLASS (nm_device_parent_class)->dispose (object);
}

static void
finalize (GObject *object)
{
	NMDevicePrivate *priv = NM_DEVICE_GET_PRIVATE (object);

	g_free (priv->iface);
	g_free (priv->ip_iface);
	g_free (priv->udi);
	g_free (priv->driver);
	g_free (priv->driver_version);
	g_free (priv->firmware_version);
	g_free (priv->product);
	g_free (priv->short_product);
	g_free (priv->vendor);
	g_free (priv->short_vendor);
	g_free (priv->description);
	g_free (priv->bus_name);
	g_free (priv->type_description);
	g_free (priv->physical_port_id);

	G_OBJECT_CLASS (nm_device_parent_class)->finalize (object);
}

static void
get_property (GObject *object,
              guint prop_id,
              GValue *value,
              GParamSpec *pspec)
{
	NMDevice *device = NM_DEVICE (object);
	NMDevicePrivate *priv = NM_DEVICE_GET_PRIVATE (device);

	_nm_object_ensure_inited (NM_OBJECT (object));

	switch (prop_id) {
	case PROP_DEVICE_TYPE:
		g_value_set_uint (value, nm_device_get_device_type (device));
		break;
	case PROP_UDI:
		g_value_set_string (value, nm_device_get_udi (device));
		break;
	case PROP_INTERFACE:
		g_value_set_string (value, nm_device_get_iface (device));
		break;
	case PROP_IP_INTERFACE:
		g_value_set_string (value, nm_device_get_ip_iface (device));
		break;
	case PROP_DRIVER:
		g_value_set_string (value, nm_device_get_driver (device));
		break;
	case PROP_DRIVER_VERSION:
		g_value_set_string (value, nm_device_get_driver_version (device));
		break;
	case PROP_FIRMWARE_VERSION:
		g_value_set_string (value, nm_device_get_firmware_version (device));
		break;
	case PROP_CAPABILITIES:
		g_value_set_uint (value, nm_device_get_capabilities (device));
		break;
	case PROP_MANAGED:
		g_value_set_boolean (value, nm_device_get_managed (device));
		break;
	case PROP_AUTOCONNECT:
		g_value_set_boolean (value, nm_device_get_autoconnect (device));
		break;
	case PROP_FIRMWARE_MISSING:
		g_value_set_boolean (value, nm_device_get_firmware_missing (device));
		break;
	case PROP_IP4_CONFIG:
		g_value_set_object (value, nm_device_get_ip4_config (device));
		break;
	case PROP_DHCP4_CONFIG:
		g_value_set_object (value, nm_device_get_dhcp4_config (device));
		break;
	case PROP_IP6_CONFIG:
		g_value_set_object (value, nm_device_get_ip6_config (device));
		break;
	case PROP_DHCP6_CONFIG:
		g_value_set_object (value, nm_device_get_dhcp6_config (device));
		break;
	case PROP_STATE:
		g_value_set_uint (value, nm_device_get_state (device));
		break;
	case PROP_STATE_REASON:
		g_value_set_boxed (value,
		                   dbus_g_type_specialized_construct (DBUS_G_TYPE_UINT_STRUCT));
		dbus_g_type_struct_set (value,
		                        0, priv->state,
		                        1, priv->reason,
		                        G_MAXUINT);
		break;
	case PROP_ACTIVE_CONNECTION:
		g_value_set_object (value, nm_device_get_active_connection (device));
		break;
	case PROP_AVAILABLE_CONNECTIONS:
		g_value_set_boxed (value, nm_device_get_available_connections (device));
		break;
	case PROP_PRODUCT:
		g_value_set_string (value, nm_device_get_product (device));
		break;
	case PROP_VENDOR:
		g_value_set_string (value, nm_device_get_vendor (device));
		break;
	case PROP_PHYSICAL_PORT_ID:
		g_value_set_string (value, nm_device_get_physical_port_id (device));
		break;
	case PROP_MTU:
		g_value_set_uint (value, nm_device_get_mtu (device));
		break;
	default:
		G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
		break;
	}
}

static void
set_property (GObject *object,
              guint prop_id,
              const GValue *value,
              GParamSpec *pspec)
{
	NMDevice *self = NM_DEVICE (object);
	NMDevicePrivate *priv = NM_DEVICE_GET_PRIVATE (self);
	gboolean b;

	switch (prop_id) {
	case PROP_DEVICE_TYPE:
		/* Construct only */
		priv->device_type = g_value_get_uint (value);
		break;
	case PROP_AUTOCONNECT:
		b = g_value_get_boolean (value);
		if (priv->autoconnect != b)
			nm_device_set_autoconnect (NM_DEVICE (object), b);
		break;
	default:
		G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
		break;
	}
}

static void
nm_device_class_init (NMDeviceClass *device_class)
{
	GObjectClass *object_class = G_OBJECT_CLASS (device_class);

	g_type_class_add_private (device_class, sizeof (NMDevicePrivate));

	/* virtual methods */
	object_class->constructed = constructed;
	object_class->get_property = get_property;
	object_class->set_property = set_property;
	object_class->dispose = dispose;
	object_class->finalize = finalize;

	device_class->connection_compatible = connection_compatible;

	/* properties */

	/**
	 * NMDevice:interface:
	 *
	 * The interface of the device.
	 **/
	g_object_class_install_property
		(object_class, PROP_INTERFACE,
		 g_param_spec_string (NM_DEVICE_INTERFACE, "", "",
		                      NULL,
		                      G_PARAM_READABLE |
		                      G_PARAM_STATIC_STRINGS));

	/**
	 * NMDevice:ip-interface:
	 *
	 * The IP interface of the device which should be used for all IP-related
	 * operations like addressing and routing.
	 **/
	g_object_class_install_property
		(object_class, PROP_IP_INTERFACE,
		 g_param_spec_string (NM_DEVICE_IP_INTERFACE, "", "",
		                      NULL,
		                      G_PARAM_READABLE |
		                      G_PARAM_STATIC_STRINGS));

	/**
	 * NMDevice:device-type:
	 *
	 * The numeric type of the device.
	 **/
	g_object_class_install_property
		(object_class, PROP_DEVICE_TYPE,
		 g_param_spec_uint (NM_DEVICE_DEVICE_TYPE, "", "",
		                    NM_DEVICE_TYPE_UNKNOWN, G_MAXUINT32, NM_DEVICE_TYPE_UNKNOWN,
		                    G_PARAM_READABLE |
		                    G_PARAM_STATIC_STRINGS));
	/**
	 * NMDevice:udi:
	 *
	 * An operating-system specific device hardware identifier; this is not
	 * unique to a specific hardware device across reboots or hotplugs.  It
	 * is an opaque string which for some device types (Bluetooth, Modem)
	 * contains an identifier provided by the underlying hardware service daemon
	 * such as Bluez or ModemManager, and clients can use this property to
	 * request more information about the device from those services.
	 **/
	g_object_class_install_property
		(object_class, PROP_UDI,
		 g_param_spec_string (NM_DEVICE_UDI, "", "",
		                      NULL,
		                      G_PARAM_READABLE |
		                      G_PARAM_STATIC_STRINGS));

	/**
	 * NMDevice:driver:
	 *
	 * The driver of the device.
	 **/
	g_object_class_install_property
		(object_class, PROP_DRIVER,
		 g_param_spec_string (NM_DEVICE_DRIVER, "", "",
		                      NULL,
		                      G_PARAM_READABLE |
		                      G_PARAM_STATIC_STRINGS));

	/**
	 * NMDevice:driver-version:
	 *
	 * The version of the device driver.
	 **/
	g_object_class_install_property
		(object_class, PROP_DRIVER_VERSION,
		 g_param_spec_string (NM_DEVICE_DRIVER_VERSION, "", "",
		                      NULL,
		                      G_PARAM_READABLE |
		                      G_PARAM_STATIC_STRINGS));

	/**
	 * NMDevice:firmware-version:
	 *
	 * The firmware version of the device.
	 **/
	g_object_class_install_property
		(object_class, PROP_FIRMWARE_VERSION,
		 g_param_spec_string (NM_DEVICE_FIRMWARE_VERSION, "", "",
		                      NULL,
		                      G_PARAM_READABLE |
		                      G_PARAM_STATIC_STRINGS));

	/**
	 * NMDevice:capabilities:
	 *
	 * The capabilities of the device.
	 **/
	g_object_class_install_property
		(object_class, PROP_CAPABILITIES,
		 g_param_spec_uint (NM_DEVICE_CAPABILITIES, "", "",
		                    0, G_MAXUINT32, 0,
		                    G_PARAM_READABLE |
		                    G_PARAM_STATIC_STRINGS));

	/**
	 * NMDevice:managed:
	 *
	 * Whether the device is managed by NetworkManager.
	 **/
	g_object_class_install_property
		(object_class, PROP_MANAGED,
		 g_param_spec_boolean (NM_DEVICE_MANAGED, "", "",
		                       FALSE,
		                       G_PARAM_READABLE |
		                       G_PARAM_STATIC_STRINGS));

	/**
	 * NMDevice:autoconnect:
	 *
	 * Whether the device can auto-activate a connection.
	 **/
	g_object_class_install_property
		(object_class, PROP_AUTOCONNECT,
		 g_param_spec_boolean (NM_DEVICE_AUTOCONNECT, "", "",
		                       TRUE,
		                       G_PARAM_READWRITE |
		                       G_PARAM_STATIC_STRINGS));

	/**
	 * NMDevice:firmware-missing:
	 *
	 * When %TRUE indicates the device is likely missing firmware required
	 * for its operation.
	 **/
	g_object_class_install_property
		(object_class, PROP_FIRMWARE_MISSING,
		 g_param_spec_boolean (NM_DEVICE_FIRMWARE_MISSING, "", "",
		                       FALSE,
		                       G_PARAM_READABLE |
		                       G_PARAM_STATIC_STRINGS));

	/**
	 * NMDevice:ip4-config:
	 *
	 * The #NMIP4Config of the device.
	 **/
	g_object_class_install_property
		(object_class, PROP_IP4_CONFIG,
		 g_param_spec_object (NM_DEVICE_IP4_CONFIG, "", "",
		                      NM_TYPE_IP4_CONFIG,
		                      G_PARAM_READABLE |
		                      G_PARAM_STATIC_STRINGS));

	/**
	 * NMDevice:dhcp4-config:
	 *
	 * The #NMDHCP4Config of the device.
	 **/
	g_object_class_install_property
		(object_class, PROP_DHCP4_CONFIG,
		 g_param_spec_object (NM_DEVICE_DHCP4_CONFIG, "", "",
		                      NM_TYPE_DHCP4_CONFIG,
		                      G_PARAM_READABLE |
		                      G_PARAM_STATIC_STRINGS));

	/**
	 * NMDevice:ip6-config:
	 *
	 * The #NMIP6Config of the device.
	 **/
	g_object_class_install_property
		(object_class, PROP_IP6_CONFIG,
		 g_param_spec_object (NM_DEVICE_IP6_CONFIG, "", "",
		                      NM_TYPE_IP6_CONFIG,
		                      G_PARAM_READABLE |
		                      G_PARAM_STATIC_STRINGS));

	/**
	 * NMDevice:dhcp6-config:
	 *
	 * The #NMDHCP6Config of the device.
	 **/
	g_object_class_install_property
		(object_class, PROP_DHCP6_CONFIG,
		 g_param_spec_object (NM_DEVICE_DHCP6_CONFIG, "", "",
		                      NM_TYPE_DHCP6_CONFIG,
		                      G_PARAM_READABLE |
		                      G_PARAM_STATIC_STRINGS));

	/**
	 * NMDevice:state:
	 *
	 * The state of the device.
	 **/
	g_object_class_install_property
		(object_class, PROP_STATE,
		 g_param_spec_uint (NM_DEVICE_STATE, "", "",
		                    0, G_MAXUINT32, 0,
		                    G_PARAM_READABLE |
		                    G_PARAM_STATIC_STRINGS));

	/**
	 * NMDevice:state-reason:
	 *
	 * The state and reason of the device.
	 **/
	g_object_class_install_property
		(object_class, PROP_STATE_REASON,
		 g_param_spec_boxed (NM_DEVICE_STATE_REASON, "", "",
		                     DBUS_G_TYPE_UINT_STRUCT,
		                     G_PARAM_READABLE |
		                     G_PARAM_STATIC_STRINGS));

	/**
	 * NMDevice:active-connection:
	 *
	 * The #NMActiveConnection object that "owns" this device during activation.
	 **/
	g_object_class_install_property
		(object_class, PROP_ACTIVE_CONNECTION,
		 g_param_spec_object (NM_DEVICE_ACTIVE_CONNECTION, "", "",
		                      NM_TYPE_ACTIVE_CONNECTION,
		                      G_PARAM_READABLE |
		                      G_PARAM_STATIC_STRINGS));

	/**
	 * NMDevice:available-connections:
	 *
	 * The available connections (#NMRemoteConnection) of the device
	 *
	 * Since: 0.9.8
	 **/
	g_object_class_install_property
		(object_class, PROP_AVAILABLE_CONNECTIONS,
		 g_param_spec_boxed (NM_DEVICE_AVAILABLE_CONNECTIONS, "", "",
		                     NM_TYPE_OBJECT_ARRAY,
		                     G_PARAM_READABLE |
		                     G_PARAM_STATIC_STRINGS));

	/**
	 * NMDevice:vendor:
	 *
	 * The vendor string of the device.
	 **/
	g_object_class_install_property
		(object_class, PROP_VENDOR,
		 g_param_spec_string (NM_DEVICE_VENDOR, "", "",
		                      NULL,
		                      G_PARAM_READABLE |
		                      G_PARAM_STATIC_STRINGS));

	/**
	 * NMDevice:product:
	 *
	 * The product string of the device.
	 **/
	g_object_class_install_property
		(object_class, PROP_PRODUCT,
		 g_param_spec_string (NM_DEVICE_PRODUCT, "", "",
		                      NULL,
		                      G_PARAM_READABLE |
		                      G_PARAM_STATIC_STRINGS));

	/**
	 * NMDevice:physical-port-id:
	 *
	 * The physical port ID of the device. (See
	 * nm_device_get_physical_port_id().)
	 *
	 * Since: 0.9.10
	 **/
	g_object_class_install_property
		(object_class, PROP_PHYSICAL_PORT_ID,
		 g_param_spec_string (NM_DEVICE_PHYSICAL_PORT_ID, "", "",
		                      NULL,
		                      G_PARAM_READABLE |
		                      G_PARAM_STATIC_STRINGS));

	/**
	 * NMDevice:mtu:
	 *
	 * The MTU of the device.
	 *
	 * Since: 0.9.10
	 **/
	g_object_class_install_property
		(object_class, PROP_MTU,
		 g_param_spec_uint (NM_DEVICE_MTU, "", "",
		                    0, G_MAXUINT32, 1500,
		                    G_PARAM_READABLE |
		                    G_PARAM_STATIC_STRINGS));

	/* signals */

	/**
	 * NMDevice::state-changed:
	 * @device: the device object that received the signal
	 * @new_state: the new state of the device
	 * @old_state: the previous state of the device
	 * @reason: the reason describing the state change
	 *
	 * Notifies the state change of a #NMDevice.
	 **/
	signals[STATE_CHANGED] =
		g_signal_new ("state-changed",
				    G_OBJECT_CLASS_TYPE (object_class),
				    G_SIGNAL_RUN_FIRST,
				    G_STRUCT_OFFSET (NMDeviceClass, state_changed),
				    NULL, NULL, NULL,
				    G_TYPE_NONE, 3,
				    G_TYPE_UINT, G_TYPE_UINT, G_TYPE_UINT);
}

/**
 * _nm_device_set_device_type:
 * @device: the device
 * @dtype: the NM device type
 *
 * Sets the NM device type if it wasn't set during construction.  INTERNAL
 * ONLY METHOD.
 **/
void
_nm_device_set_device_type (NMDevice *device, NMDeviceType dtype)
{
	NMDevicePrivate *priv;

	g_return_if_fail (device != NULL);
	g_return_if_fail (dtype != NM_DEVICE_TYPE_UNKNOWN);

	priv = NM_DEVICE_GET_PRIVATE (device);
	if (priv->device_type == NM_DEVICE_TYPE_UNKNOWN)
		priv->device_type = dtype;
	else
		g_warn_if_fail (dtype == priv->device_type);
}

static GType
_nm_device_type_for_path (DBusGConnection *connection,
                          const char *path)
{
	DBusGProxy *proxy;
	GError *err = NULL;
	GValue value = G_VALUE_INIT;
	NMDeviceType nm_dtype;

	proxy = _nm_dbus_new_proxy_for_connection (connection, path, "org.freedesktop.DBus.Properties");
	if (!proxy) {
		g_warning ("%s: couldn't create D-Bus object proxy.", __func__);
		return G_TYPE_INVALID;
	}

	if (!dbus_g_proxy_call (proxy,
	                        "Get", &err,
	                        G_TYPE_STRING, NM_DBUS_INTERFACE_DEVICE,
	                        G_TYPE_STRING, "DeviceType",
	                        G_TYPE_INVALID,
	                        G_TYPE_VALUE, &value, G_TYPE_INVALID)) {
		g_warning ("Error in get_property: %s\n", err->message);
		g_error_free (err);
		g_object_unref (proxy);
		return G_TYPE_INVALID;
	}
	g_object_unref (proxy);

	nm_dtype = g_value_get_uint (&value);
	return _nm_device_gtype_from_dtype (nm_dtype);
}

/**
 * nm_device_new:
 * @connection: the #DBusGConnection
 * @path: the DBus object path of the device
 *
 * Creates a new #NMDevice.
 *
 * Returns: (transfer full): a new device
 **/
GObject *
nm_device_new (DBusGConnection *connection, const char *path)
{
	GType dtype;
	NMDevice *device = NULL;

	g_return_val_if_fail (connection != NULL, NULL);
	g_return_val_if_fail (path != NULL, NULL);

	dtype = _nm_device_type_for_path (connection, path);
	if (dtype == G_TYPE_INVALID)
		return NULL;

	device = (NMDevice *) g_object_new (dtype,
	                                    NM_OBJECT_DBUS_CONNECTION, connection,
	                                    NM_OBJECT_DBUS_PATH, path,
	                                    NULL);
	_nm_object_ensure_inited (NM_OBJECT (device));
	return G_OBJECT (device);
}

typedef struct {
	DBusGConnection *connection;
	NMObjectTypeCallbackFunc callback;
	gpointer user_data;
} NMDeviceAsyncData;

static void
async_got_type (DBusGProxy *proxy, DBusGProxyCall *call, gpointer user_data)
{
	NMDeviceAsyncData *async_data = user_data;
	GValue value = G_VALUE_INIT;
	const char *path = dbus_g_proxy_get_path (proxy);
	GError *error = NULL;
	GType type;

	if (dbus_g_proxy_end_call (proxy, call, &error,
	                           G_TYPE_VALUE, &value,
	                           G_TYPE_INVALID)) {
		NMDeviceType dtype;

		dtype = g_value_get_uint (&value);
		type = _nm_device_gtype_from_dtype (dtype);
	} else {
		g_warning ("%s: could not read properties for %s: %s", __func__, path, error->message);
		g_error_free (error);
		type = G_TYPE_INVALID;
	}

	async_data->callback (type, async_data->user_data);
	g_object_unref (proxy);
	g_slice_free (NMDeviceAsyncData, async_data);
}

static void
_nm_device_type_for_path_async (DBusGConnection *connection,
                                const char *path,
                                NMObjectTypeCallbackFunc callback,
                                gpointer user_data)
{
	NMDeviceAsyncData *async_data;
	DBusGProxy *proxy;

	async_data = g_slice_new (NMDeviceAsyncData);
	async_data->connection = connection;
	async_data->callback = callback;
	async_data->user_data = user_data;

	proxy = _nm_dbus_new_proxy_for_connection (connection, path, "org.freedesktop.DBus.Properties");
	dbus_g_proxy_begin_call (proxy, "Get",
	                         async_got_type, async_data, NULL,
	                         G_TYPE_STRING, NM_DBUS_INTERFACE_DEVICE,
	                         G_TYPE_STRING, "DeviceType",
	                         G_TYPE_INVALID);
}

/**
 * nm_device_get_iface:
 * @device: a #NMDevice
 *
 * Gets the interface name of the #NMDevice.
 *
 * Returns: the interface of the device. This is the internal string used by the
 * device, and must not be modified.
 **/
const char *
nm_device_get_iface (NMDevice *device)
{
	g_return_val_if_fail (NM_IS_DEVICE (device), NULL);

	_nm_object_ensure_inited (NM_OBJECT (device));
	return NM_DEVICE_GET_PRIVATE (device)->iface;
}

/**
 * nm_device_get_ip_iface:
 * @device: a #NMDevice
 *
 * Gets the IP interface name of the #NMDevice over which IP traffic flows
 * when the device is in the ACTIVATED state.
 *
 * Returns: the IP traffic interface of the device. This is the internal string
 * used by the device, and must not be modified.
 **/
const char *
nm_device_get_ip_iface (NMDevice *device)
{
	g_return_val_if_fail (NM_IS_DEVICE (device), NULL);

	_nm_object_ensure_inited (NM_OBJECT (device));
	return NM_DEVICE_GET_PRIVATE (device)->ip_iface;
}

/**
 * nm_device_get_device_type:
 * @device: a #NMDevice
 *
 * Returns the numeric type of the #NMDevice, ie Ethernet, Wi-Fi, etc.
 *
 * Returns: the device type
 **/
NMDeviceType
nm_device_get_device_type (NMDevice *self)
{
	g_return_val_if_fail (NM_IS_DEVICE (self), NM_DEVICE_TYPE_UNKNOWN);

	return NM_DEVICE_GET_PRIVATE (self)->device_type;
}

/**
 * nm_device_get_udi:
 * @device: a #NMDevice
 *
 * Gets the Unique Device Identifier of the #NMDevice.
 *
 * Returns: the Unique Device Identifier of the device.  This identifier may be
 * used to gather more information about the device from various operating
 * system services like udev or sysfs.
 **/
const char *
nm_device_get_udi (NMDevice *device)
{
	g_return_val_if_fail (NM_IS_DEVICE (device), NULL);

	_nm_object_ensure_inited (NM_OBJECT (device));
	return NM_DEVICE_GET_PRIVATE (device)->udi;
}

/**
 * nm_device_get_driver:
 * @device: a #NMDevice
 *
 * Gets the driver of the #NMDevice.
 *
 * Returns: the driver of the device. This is the internal string used by the
 * device, and must not be modified.
 **/
const char *
nm_device_get_driver (NMDevice *device)
{
	g_return_val_if_fail (NM_IS_DEVICE (device), NULL);

	_nm_object_ensure_inited (NM_OBJECT (device));
	return NM_DEVICE_GET_PRIVATE (device)->driver;
}

/**
 * nm_device_get_driver_version:
 * @device: a #NMDevice
 *
 * Gets the driver version of the #NMDevice.
 *
 * Returns: the version of the device driver. This is the internal string used by the
 * device, and must not be modified.
 **/
const char *
nm_device_get_driver_version (NMDevice *device)
{
	g_return_val_if_fail (NM_IS_DEVICE (device), NULL);

	_nm_object_ensure_inited (NM_OBJECT (device));
	return NM_DEVICE_GET_PRIVATE (device)->driver_version;
}

/**
 * nm_device_get_firmware_version:
 * @device: a #NMDevice
 *
 * Gets the firmware version of the #NMDevice.
 *
 * Returns: the firmware version of the device. This is the internal string used by the
 * device, and must not be modified.
 **/
const char *
nm_device_get_firmware_version (NMDevice *device)
{
	g_return_val_if_fail (NM_IS_DEVICE (device), NULL);

	_nm_object_ensure_inited (NM_OBJECT (device));
	return NM_DEVICE_GET_PRIVATE (device)->firmware_version;
}

/**
 * nm_device_get_type_description:
 * @device: a #NMDevice
 *
 * Gets a (non-localized) description of the type of device that
 * @device is.
 *
 * Returns: the type description of the device. This is the internal
 * string used by the device, and must not be modified.
 *
 * Since: 0.9.10
 **/
const char *
nm_device_get_type_description (NMDevice *device)
{
	NMDevicePrivate *priv = NM_DEVICE_GET_PRIVATE (device);
	const char *desc, *typename;

	g_return_val_if_fail (NM_IS_DEVICE (device), NULL);

	if (priv->type_description)
		return priv->type_description;

	if (NM_DEVICE_GET_CLASS (device)->get_type_description) {
		desc = NM_DEVICE_GET_CLASS (device)->get_type_description (device);
		if (desc)
			return desc;
	}

	typename = G_OBJECT_TYPE_NAME (device);
	if (g_str_has_prefix (typename, "NMDevice"))
		typename += 8;
	priv->type_description = g_ascii_strdown (typename, -1);

	return priv->type_description;
}

/**
 * nm_device_get_hw_address:
 * @device: a #NMDevice
 *
 * Gets the current a hardware address (MAC) for the @device.
 *
 * Returns: the current MAC of the device, or %NULL.
 * This is the internal string used by the device, and must not be modified.
 *
 * Since: 0.9.10
 **/
const char *
nm_device_get_hw_address (NMDevice *device)
{
	g_return_val_if_fail (NM_IS_DEVICE (device), NULL);

	if (NM_DEVICE_GET_CLASS (device)->get_hw_address)
		return NM_DEVICE_GET_CLASS (device)->get_hw_address (device);

	return NULL;
}

/**
 * nm_device_get_capabilities:
 * @device: a #NMDevice
 *
 * Gets the device' capabilities.
 *
 * Returns: the capabilities
 **/
NMDeviceCapabilities
nm_device_get_capabilities (NMDevice *device)
{
	g_return_val_if_fail (NM_IS_DEVICE (device), 0);

	_nm_object_ensure_inited (NM_OBJECT (device));
	return NM_DEVICE_GET_PRIVATE (device)->capabilities;
}

/**
 * nm_device_get_managed:
 * @device: a #NMDevice
 *
 * Whether the #NMDevice is managed by NetworkManager.
 *
 * Returns: %TRUE if the device is managed by NetworkManager
 **/
gboolean
nm_device_get_managed (NMDevice *device)
{
	g_return_val_if_fail (NM_IS_DEVICE (device), 0);

	_nm_object_ensure_inited (NM_OBJECT (device));
	return NM_DEVICE_GET_PRIVATE (device)->managed;
}

/**
 * nm_device_get_autoconnect:
 * @device: a #NMDevice
 *
 * Whether the #NMDevice can be autoconnected.
 *
 * Returns: %TRUE if the device is allowed to be autoconnected
 **/
gboolean
nm_device_get_autoconnect (NMDevice *device)
{
	g_return_val_if_fail (NM_IS_DEVICE (device), FALSE);

	_nm_object_ensure_inited (NM_OBJECT (device));
	return NM_DEVICE_GET_PRIVATE (device)->autoconnect;
}

/**
 * nm_device_set_autoconnect:
 * @device: a #NMDevice
 * @autoconnect: %TRUE to enable autoconnecting
 *
 * Enables or disables automatic activation of the #NMDevice.
 **/
void
nm_device_set_autoconnect (NMDevice *device, gboolean autoconnect)
{
	GValue value = G_VALUE_INIT;

	g_return_if_fail (NM_IS_DEVICE (device));

	g_value_init (&value, G_TYPE_BOOLEAN);
	g_value_set_boolean (&value, autoconnect);


	NM_DEVICE_GET_PRIVATE (device)->autoconnect = autoconnect;

	_nm_object_set_property (NM_OBJECT (device),
	                         NM_DBUS_INTERFACE_DEVICE,
	                         "Autoconnect",
	                         &value);
}

/**
 * nm_device_get_firmware_missing:
 * @device: a #NMDevice
 *
 * Indicates that firmware required for the device's operation is likely
 * to be missing.
 *
 * Returns: %TRUE if firmware required for the device's operation is likely
 * to be missing.
 **/
gboolean
nm_device_get_firmware_missing (NMDevice *device)
{
	g_return_val_if_fail (NM_IS_DEVICE (device), 0);

	_nm_object_ensure_inited (NM_OBJECT (device));
	return NM_DEVICE_GET_PRIVATE (device)->firmware_missing;
}

/**
 * nm_device_get_ip4_config:
 * @device: a #NMDevice
 *
 * Gets the current #NMIP4Config associated with the #NMDevice.
 *
 * Note that as of NetworkManager 0.9.10, you can alternatively use
 * nm_active_connection_get_ip4_config(), which also works with VPN
 * connections.
 *
 * Returns: (transfer none): the #NMIP4Config or %NULL if the device is not activated.
 **/
NMIP4Config *
nm_device_get_ip4_config (NMDevice *device)
{
	g_return_val_if_fail (NM_IS_DEVICE (device), NULL);

	_nm_object_ensure_inited (NM_OBJECT (device));
	return NM_DEVICE_GET_PRIVATE (device)->ip4_config;
}

/**
 * nm_device_get_dhcp4_config:
 * @device: a #NMDevice
 *
 * Gets the current #NMDHCP4Config associated with the #NMDevice.
 *
 * Note that as of NetworkManager 0.9.10, you can alternatively use
 * nm_active_connection_get_dhcp4_config(), which also works with VPN
 * connections.
 *
 * Returns: (transfer none): the #NMDHCP4Config or %NULL if the device is not activated or not
 * using DHCP.
 **/
NMDHCP4Config *
nm_device_get_dhcp4_config (NMDevice *device)
{
	g_return_val_if_fail (NM_IS_DEVICE (device), NULL);

	_nm_object_ensure_inited (NM_OBJECT (device));
	return NM_DEVICE_GET_PRIVATE (device)->dhcp4_config;
}

/**
 * nm_device_get_ip6_config:
 * @device: a #NMDevice
 *
 * Gets the current #NMIP6Config associated with the #NMDevice.
 *
 * Note that as of NetworkManager 0.9.10, you can alternatively use
 * nm_active_connection_get_ip6_config(), which also works with VPN
 * connections.
 *
 * Returns: (transfer none): the #NMIP6Config or %NULL if the device is not activated.
 **/
NMIP6Config *
nm_device_get_ip6_config (NMDevice *device)
{
	g_return_val_if_fail (NM_IS_DEVICE (device), NULL);

	_nm_object_ensure_inited (NM_OBJECT (device));
	return NM_DEVICE_GET_PRIVATE (device)->ip6_config;
}

/**
 * nm_device_get_dhcp6_config:
 * @device: a #NMDevice
 *
 * Gets the current #NMDHCP6Config associated with the #NMDevice.
 *
 * Note that as of NetworkManager 0.9.10, you can alternatively use
 * nm_active_connection_get_dhcp6_config(), which also works with VPN
 * connections.
 *
 * Returns: (transfer none): the #NMDHCP6Config or %NULL if the device is not activated or not
 * using DHCP.
 **/
NMDHCP6Config *
nm_device_get_dhcp6_config (NMDevice *device)
{
	g_return_val_if_fail (NM_IS_DEVICE (device), NULL);

	_nm_object_ensure_inited (NM_OBJECT (device));
	return NM_DEVICE_GET_PRIVATE (device)->dhcp6_config;
}

/**
 * nm_device_get_state:
 * @device: a #NMDevice
 *
 * Gets the current #NMDevice state.
 *
 * Returns: the current device state
 **/
NMDeviceState
nm_device_get_state (NMDevice *device)
{
	g_return_val_if_fail (NM_IS_DEVICE (device), NM_DEVICE_STATE_UNKNOWN);

	_nm_object_ensure_inited (NM_OBJECT (device));
	return NM_DEVICE_GET_PRIVATE (device)->state;
}

/**
 * nm_device_get_state_reason:
 * @device: a #NMDevice
 * @reason: (out) (allow-none): location to store reason (#NMDeviceStateReason), or %NULL
 *
 * Gets the current #NMDevice state (return value) and the reason for entering
 * the state (@reason argument).
 *
 * Returns: the current device state
 **/
NMDeviceState
nm_device_get_state_reason (NMDevice *device, NMDeviceStateReason *reason)
{
	g_return_val_if_fail (NM_IS_DEVICE (device), NM_DEVICE_STATE_UNKNOWN);

	_nm_object_ensure_inited (NM_OBJECT (device));
	if (reason)
		*reason = NM_DEVICE_GET_PRIVATE (device)->reason;
	return NM_DEVICE_GET_PRIVATE (device)->state;
}

/**
 * nm_device_get_active_connection:
 * @device: a #NMDevice
 *
 * Gets the #NMActiveConnection object which owns this device during activation.
 *
 * Returns: (transfer none): the #NMActiveConnection or %NULL if the device is
 * not part of an active connection
 **/
NMActiveConnection *
nm_device_get_active_connection (NMDevice *device)
{
	g_return_val_if_fail (NM_IS_DEVICE (device), NULL);

	_nm_object_ensure_inited (NM_OBJECT (device));
	return NM_DEVICE_GET_PRIVATE (device)->active_connection;
}

/**
 * nm_device_get_available_connections:
 * @device: a #NMDevice
 *
 * Gets the #NMRemoteConnections currently known to the daemon that could
 * be activated on @device.
 *
 * Returns: (element-type NMRemoteConnection): the #GPtrArray
 * containing #NMRemoteConnections. This is the internal copy used by
 * the connection, and must not be modified.
 *
 * Since: 0.9.8
 **/
const GPtrArray *
nm_device_get_available_connections (NMDevice *device)
{
	g_return_val_if_fail (NM_IS_DEVICE (device), NULL);

	_nm_object_ensure_inited (NM_OBJECT (device));
	return handle_ptr_array_return (NM_DEVICE_GET_PRIVATE (device)->available_connections);
}

static char *
get_decoded_property (GUdevDevice *device, const char *property)
{
	const char *orig, *p;
	char *unescaped, *n;
	guint len;

	p = orig = g_udev_device_get_property (device, property);
	if (!orig)
		return NULL;

	len = strlen (orig);
	n = unescaped = g_malloc0 (len + 1);
	while (*p) {
		if ((len >= 4) && (*p == '\\') && (*(p+1) == 'x')) {
			*n++ = (char) nm_utils_hex2byte (p + 2);
			p += 4;
			len -= 4;
		} else {
			*n++ = *p++;
			len--;
		}
	}

	return unescaped;
}

static gboolean
ensure_udev_client (NMDevice *device)
{
	static const char *const subsys[3] = { "net", "tty", NULL };
	NMDevicePrivate *priv = NM_DEVICE_GET_PRIVATE (device);

	if (!priv->client)
		priv->client = g_udev_client_new (subsys);

	return priv->client != NULL;
}

static char *
_get_udev_property (NMDevice *device,
                    const char *enc_prop,  /* ID_XXX_ENC */
                    const char *db_prop)   /* ID_XXX_FROM_DATABASE */
{
	NMDevicePrivate *priv = NM_DEVICE_GET_PRIVATE (device);
	GUdevDevice *udev_device = NULL, *tmpdev, *olddev;
	const char *ifname;
	guint32 count = 0;
	char *enc_value = NULL, *db_value = NULL;

	if (!ensure_udev_client (device))
		return NULL;

	ifname = nm_device_get_iface (device);
	if (!ifname)
		return NULL;

	udev_device = g_udev_client_query_by_subsystem_and_name (priv->client, "net", ifname);
	if (!udev_device)
		udev_device = g_udev_client_query_by_subsystem_and_name (priv->client, "tty", ifname);
	if (!udev_device)
		return NULL;

	/* Walk up the chain of the device and its parents a few steps to grab
	 * vendor and device ID information off it.
	 */

	/* Ref the device again because we have to unref it each iteration,
	 * as g_udev_device_get_parent() returns a ref-ed object.
	 */
	tmpdev = g_object_ref (udev_device);
	while ((count++ < 3) && tmpdev && !enc_value) {
		if (!enc_value)
			enc_value = get_decoded_property (tmpdev, enc_prop);
		if (!db_value)
			db_value = g_strdup (g_udev_device_get_property (tmpdev, db_prop));

		olddev = tmpdev;
		tmpdev = g_udev_device_get_parent (tmpdev);
		g_object_unref (olddev);
	}

	/* Unref the last device if we found what we needed before running out
	 * of parents.
	 */
	if (tmpdev)
		g_object_unref (tmpdev);

	/* Balance the initial g_udev_client_query_by_subsystem_and_name() */
	g_object_unref (udev_device);

	/* Prefer the encoded value which comes directly from the device
	 * over the hwdata database value.
	 */
	if (enc_value) {
		g_free (db_value);
		return enc_value;
	}

	return db_value;
}

/**
 * nm_device_get_product:
 * @device: a #NMDevice
 *
 * Gets the product string of the #NMDevice.
 *
 * Returns: the product name of the device. This is the internal string used by the
 * device, and must not be modified.
 **/
const char *
nm_device_get_product (NMDevice *device)
{
	NMDevicePrivate *priv;

	g_return_val_if_fail (NM_IS_DEVICE (device), NULL);

	priv = NM_DEVICE_GET_PRIVATE (device);
	if (!priv->product) {
		priv->product = _get_udev_property (device, "ID_MODEL_ENC", "ID_MODEL_FROM_DATABASE");
		if (!priv->product) {
			/* Sometimes ID_PRODUCT_FROM_DATABASE is used? */
			priv->product = _get_udev_property (device, "ID_MODEL_ENC", "ID_PRODUCT_FROM_DATABASE");
		}
		_nm_object_queue_notify (NM_OBJECT (device), NM_DEVICE_PRODUCT);
	}
	return priv->product;
}

/**
 * nm_device_get_vendor:
 * @device: a #NMDevice
 *
 * Gets the vendor string of the #NMDevice.
 *
 * Returns: the vendor name of the device. This is the internal string used by the
 * device, and must not be modified.
 **/
const char *
nm_device_get_vendor (NMDevice *device)
{
	NMDevicePrivate *priv;

	g_return_val_if_fail (NM_IS_DEVICE (device), NULL);

	priv = NM_DEVICE_GET_PRIVATE (device);
	if (!priv->vendor) {
		priv->vendor = _get_udev_property (device, "ID_VENDOR_ENC", "ID_VENDOR_FROM_DATABASE");
		_nm_object_queue_notify (NM_OBJECT (device), NM_DEVICE_VENDOR);
	}
	return priv->vendor;
}

static const char * const ignored_words[] = {
	"Semiconductor",
	"Components",
	"Corporation",
	"Communications",
	"Company",
	"Corp.",
	"Corp",
	"Co.",
	"Inc.",
	"Inc",
	"Incorporated",
	"Ltd.",
	"Limited.",
	"Intel?",
	"chipset",
	"adapter",
	"[hex]",
	"NDIS",
	"Module",
	NULL
};

static const char * const ignored_phrases[] = {
	"Multiprotocol MAC/baseband processor",
	"Wireless LAN Controller",
	"Wireless LAN Adapter",
	"Wireless Adapter",
	"Network Connection",
	"Wireless Cardbus Adapter",
	"Wireless CardBus Adapter",
	"54 Mbps Wireless PC Card",
	"Wireless PC Card",
	"Wireless PC",
	"PC Card with XJACK(r) Antenna",
	"Wireless cardbus",
	"Wireless LAN PC Card",
	"Technology Group Ltd.",
	"Communication S.p.A.",
	"Business Mobile Networks BV",
	"Mobile Broadband Minicard Composite Device",
	"Mobile Communications AB",
	"(PC-Suite Mode)",
	NULL
};

static char *
fixup_desc_string (const char *desc)
{
	char *p, *temp;
	char **words, **item;
	GString *str;
	int i;

	if (!desc)
		return NULL;

	p = temp = g_strdup (desc);
	while (*p) {
		if (*p == '_' || *p == ',')
			*p = ' ';
		p++;
	}

	/* Attempt to shorten ID by ignoring certain phrases */
	for (i = 0; ignored_phrases[i]; i++) {
		p = strstr (temp, ignored_phrases[i]);
		if (p) {
			guint32 ignored_len = strlen (ignored_phrases[i]);

			memmove (p, p + ignored_len, strlen (p + ignored_len) + 1); /* +1 for the \0 */
		}
	}

	/* Attempt to shorten ID by ignoring certain individual words */
	words = g_strsplit (temp, " ", 0);
	str = g_string_new_len (NULL, strlen (temp));
	g_free (temp);

	for (item = words; *item; item++) {
		gboolean ignore = FALSE;

		if (**item == '\0')
			continue;

		for (i = 0; ignored_words[i]; i++) {
			if (!strcmp (*item, ignored_words[i])) {
				ignore = TRUE;
				break;
			}
		}

		if (!ignore) {
			if (str->len)
				g_string_append_c (str, ' ');
			g_string_append (str, *item);
		}
	}
	g_strfreev (words);

	temp = str->str;
	g_string_free (str, FALSE);

	return temp;
}

static void
get_description (NMDevice *device)
{
	NMDevicePrivate *priv = NM_DEVICE_GET_PRIVATE (device);
	const char *dev_product;
	const char *dev_vendor;
	char *pdown;
	char *vdown;
	GString *str;

	dev_product = nm_device_get_product (device);
	priv->short_product = fixup_desc_string (dev_product);

	dev_vendor = nm_device_get_vendor (device);
	priv->short_vendor = fixup_desc_string (dev_vendor);

	if (!dev_product || !dev_vendor) {
		priv->description = g_strdup (nm_device_get_iface (device));
		return;
	}

	str = g_string_new_len (NULL, strlen (priv->short_vendor) + strlen (priv->short_product) + 1);

	/* Another quick hack; if all of the fixed up vendor string
	 * is found in product, ignore the vendor.
	 */
	pdown = g_ascii_strdown (priv->short_product, -1);
	vdown = g_ascii_strdown (priv->short_vendor, -1);
	if (!strstr (pdown, vdown)) {
		g_string_append (str, priv->short_vendor);
		g_string_append_c (str, ' ');
	}
	g_free (pdown);
	g_free (vdown);

	g_string_append (str, priv->short_product);

	priv->description = g_string_free (str, FALSE);
}

static const char *
get_short_vendor (NMDevice *device)
{
	NMDevicePrivate *priv;

	g_return_val_if_fail (NM_IS_DEVICE (device), NULL);

	priv = NM_DEVICE_GET_PRIVATE (device);

	if (!priv->description)
		get_description (device);

	return priv->short_vendor;
}

/**
 * nm_device_get_description:
 * @device: an #NMDevice
 *
 * Gets a description of @device, incorporating the results of
 * nm_device_get_short_vendor() and nm_device_get_short_product().
 *
 * Returns: a description of @device. If either the vendor or the
 *   product name is unknown, this returns the interface name.
 *
 * Since: 0.9.10
 */
const char *
nm_device_get_description (NMDevice *device)
{
	NMDevicePrivate *priv;

	g_return_val_if_fail (NM_IS_DEVICE (device), NULL);

	priv = NM_DEVICE_GET_PRIVATE (device);

	if (!priv->description)
		get_description (device);

	return priv->description;
}

static const char *
get_type_name (NMDevice *device)
{
	switch (nm_device_get_device_type (device)) {
	case NM_DEVICE_TYPE_ETHERNET:
		return _("Ethernet");
	case NM_DEVICE_TYPE_WIFI:
		return _("Wi-Fi");
	case NM_DEVICE_TYPE_BT:
		return _("Bluetooth");
	case NM_DEVICE_TYPE_OLPC_MESH:
		return _("OLPC Mesh");
	case NM_DEVICE_TYPE_WIMAX:
		return _("WiMAX");
	case NM_DEVICE_TYPE_MODEM:
		return _("Mobile Broadband");
	case NM_DEVICE_TYPE_INFINIBAND:
		return _("InfiniBand");
	case NM_DEVICE_TYPE_BOND:
		return _("Bond");
	case NM_DEVICE_TYPE_TEAM:
		return _("Team");
	case NM_DEVICE_TYPE_BRIDGE:
		return _("Bridge");
	case NM_DEVICE_TYPE_VLAN:
		return _("VLAN");
	case NM_DEVICE_TYPE_ADSL:
		return _("ADSL");
	default:
		return _("Unknown");
	}
}

static char *
get_device_type_name_with_iface (NMDevice *device)
{
	const char *type_name = get_type_name (device);

	switch (nm_device_get_device_type (device)) {
	case NM_DEVICE_TYPE_BOND:
	case NM_DEVICE_TYPE_TEAM:
	case NM_DEVICE_TYPE_BRIDGE:
	case NM_DEVICE_TYPE_VLAN:
		return g_strdup_printf ("%s (%s)", type_name, nm_device_get_iface (device));
	default:
		return g_strdup (type_name);
	}
}

static char *
get_device_generic_type_name_with_iface (NMDevice *device)
{
	switch (nm_device_get_device_type (device)) {
	case NM_DEVICE_TYPE_ETHERNET:
	case NM_DEVICE_TYPE_INFINIBAND:
		return g_strdup (_("Wired"));
	default:
		return get_device_type_name_with_iface (device);
	}
}

static const char *
get_bus_name (NMDevice *device)
{
	NMDevicePrivate *priv = NM_DEVICE_GET_PRIVATE (device);
	GUdevDevice *udevice;
	const char *ifname, *bus;

	if (priv->bus_name)
		goto out;

	if (!ensure_udev_client (device))
		return NULL;

	ifname = nm_device_get_iface (device);
	if (!ifname)
		return NULL;

	udevice = g_udev_client_query_by_subsystem_and_name (priv->client, "net", ifname);
	if (!udevice)
		udevice = g_udev_client_query_by_subsystem_and_name (priv->client, "tty", ifname);
	if (!udevice)
		return NULL;

	bus = g_udev_device_get_property (udevice, "ID_BUS");
	if (!g_strcmp0 (bus, "pci"))
		priv->bus_name = g_strdup (_("PCI"));
	else if (!g_strcmp0 (bus, "usb"))
		priv->bus_name = g_strdup (_("USB"));
	else {
		/* Use "" instead of NULL so we can tell later that we've
		 * already tried.
		 */
		priv->bus_name = g_strdup ("");
	}

out:
	if (*priv->bus_name)
		return priv->bus_name;
	else
		return NULL;
}

static gboolean
find_duplicates (char     **names,
                 gboolean  *duplicates,
                 int        num_devices)
{
	int i, j;
	gboolean found_any = FALSE;

	memset (duplicates, 0, num_devices * sizeof (gboolean));
	for (i = 0; i < num_devices; i++) {
		if (duplicates[i])
			continue;
		for (j = i + 1; j < num_devices; j++) {
			if (duplicates[j])
				continue;
			if (!strcmp (names[i], names[j]))
				duplicates[i] = duplicates[j] = found_any = TRUE;
		}
	}

	return found_any;
}

/**
 * nm_device_disambiguate_names:
 * @devices: (array length=num_devices): an array of #NMDevice
 * @num_devices: length of @devices
 *
 * Generates a list of short-ish unique presentation names for the
 * devices in @devices.
 *
 * Returns: (transfer full) (array zero-terminated=1): the device names
 *
 * Since: 0.9.10
 */
char **
nm_device_disambiguate_names (NMDevice **devices,
                              int        num_devices)
{
	char **names;
	gboolean *duplicates;
	int i;

	names = g_new (char *, num_devices + 1);
	duplicates = g_new (gboolean, num_devices);

	/* Generic device name */
	for (i = 0; i < num_devices; i++)
		names[i] = get_device_generic_type_name_with_iface (devices[i]);
	if (!find_duplicates (names, duplicates, num_devices))
		goto done;

	/* Try specific names (eg, "Ethernet" and "InfiniBand" rather
	 * than "Wired")
	 */
	for (i = 0; i < num_devices; i++) {
		if (duplicates[i]) {
			g_free (names[i]);
			names[i] = get_device_type_name_with_iface (devices[i]);
		}
	}
	if (!find_duplicates (names, duplicates, num_devices))
		goto done;

	/* Try prefixing bus name (eg, "PCI Ethernet" vs "USB Ethernet") */
	for (i = 0; i < num_devices; i++) {
		if (duplicates[i]) {
			const char *bus = get_bus_name (devices[i]);
			char *name;

			if (!bus)
				continue;

			g_free (names[i]);
			name = get_device_type_name_with_iface (devices[i]);
			/* Translators: the first %s is a bus name (eg, "USB") or
			 * product name, the second is a device type (eg,
			 * "Ethernet"). You can change this to something like
			 * "%2$s (%1$s)" if there's no grammatical way to combine
			 * the strings otherwise.
			 */
			names[i] = g_strdup_printf (C_("long device name", "%s %s"),
			                            bus, name);
			g_free (name);
		}
	}
	if (!find_duplicates (names, duplicates, num_devices))
		goto done;

	/* Try prefixing vendor name */
	for (i = 0; i < num_devices; i++) {
		if (duplicates[i]) {
			const char *vendor = get_short_vendor (devices[i]);
			char *name;

			if (!vendor)
				continue;

			g_free (names[i]);
			name = get_device_type_name_with_iface (devices[i]);
			names[i] = g_strdup_printf (C_("long device name", "%s %s"),
			                            vendor,
			                            get_type_name (devices[i]));
			g_free (name);
		}
	}
	if (!find_duplicates (names, duplicates, num_devices))
		goto done;

	/* We have multiple identical network cards, so we have to differentiate
	 * them by interface name.
	 */
	for (i = 0; i < num_devices; i++) {
		if (duplicates[i]) {
			const char *interface = nm_device_get_iface (devices[i]);

			if (!interface)
				continue;

			g_free (names[i]);
			names[i] = g_strdup_printf ("%s (%s)",
			                            get_type_name (devices[i]),
			                            interface);
		}
	}

done:
	g_free (duplicates);
	names[num_devices] = NULL;
	return names;
}

/**
 * nm_device_get_physical_port_id:
 * @device: a #NMDevice
 *
 * Gets the physical port ID of the #NMDevice. If non-%NULL, this is
 * an opaque string that can be used to recognize when
 * seemingly-unrelated #NMDevices are actually just different virtual
 * ports on a single physical port. (Eg, NPAR / SR-IOV.)
 *
 * Returns: the physical port ID of the device, or %NULL if the port
 *   ID is unknown. This is the internal string used by the device and
 *   must not be modified.
 *
 * Since: 0.9.10
 **/
const char *
nm_device_get_physical_port_id (NMDevice *device)
{
	NMDevicePrivate *priv;

	g_return_val_if_fail (NM_IS_DEVICE (device), NULL);

	priv = NM_DEVICE_GET_PRIVATE (device);

	_nm_object_ensure_inited (NM_OBJECT (device));
	if (priv->physical_port_id && *priv->physical_port_id)
		return priv->physical_port_id;
	else
		return NULL;
}

/**
 * nm_device_get_mtu:
 * @device: a #NMDevice
 *
 * Gets the  MTU of the #NMDevice.
 *
 * Returns: the MTU of the device.
 *
 * Since: 0.9.10
 **/
guint32
nm_device_get_mtu (NMDevice *device)
{
	g_return_val_if_fail (NM_IS_DEVICE (device), 0);

	_nm_object_ensure_inited (NM_OBJECT (device));
	return NM_DEVICE_GET_PRIVATE (device)->mtu;
}

typedef struct {
	NMDevice *device;
	NMDeviceDeactivateFn fn;
	gpointer user_data;
} DeactivateInfo;

static void
deactivate_cb (DBusGProxy *proxy,
               DBusGProxyCall *call,
               gpointer user_data)
{
	DeactivateInfo *info = user_data;
	GError *error = NULL;

	dbus_g_proxy_end_call (proxy, call, &error,
	                       G_TYPE_INVALID);
	if (info->fn)
		info->fn (info->device, error, info->user_data);
	else if (error) {
		g_warning ("%s: device %s deactivation failed: (%d) %s",
		           __func__,
		           nm_object_get_path (NM_OBJECT (info->device)),
		           error ? error->code : -1,
		           error && error->message ? error->message : "(unknown)");
	}
	g_clear_error (&error);

	g_object_unref (info->device);
	g_slice_free (DeactivateInfo, info);
}

/**
 * nm_device_disconnect:
 * @device: a #NMDevice
 * @callback: (scope async) (allow-none): callback to be called when disconnect
 * operation completes
 * @user_data: (closure): caller-specific data passed to @callback
 *
 * Disconnects the device if currently connected, and prevents the device from
 * automatically connecting to networks until the next manual network connection
 * request.
 **/
void
nm_device_disconnect (NMDevice *device,
                      NMDeviceDeactivateFn callback,
                      gpointer user_data)
{
	DeactivateInfo *info;

	g_return_if_fail (NM_IS_DEVICE (device));

	info = g_slice_new (DeactivateInfo);
	info->fn = callback;
	info->user_data = user_data;
	info->device = g_object_ref (device);

	dbus_g_proxy_begin_call (NM_DEVICE_GET_PRIVATE (device)->proxy, "Disconnect",
	                         deactivate_cb, info, NULL,
	                         G_TYPE_INVALID);
}

/**
 * nm_device_connection_valid:
 * @device: an #NMDevice to validate @connection against
 * @connection: an #NMConnection to validate against @device
 *
 * Validates a given connection for a given #NMDevice object and returns
 * whether the connection may be activated with the device. For example if
 * @device is a Wi-Fi device that supports only WEP encryption, the connection
 * will only be valid if it is a Wi-Fi connection which describes a WEP or open
 * network, and will not be valid if it describes a WPA network, or if it is
 * an Ethernet, Bluetooth, WWAN, etc connection that is incompatible with the
 * device.
 *
 * Returns: %TRUE if the connection may be activated with this device, %FALSE
 * if is incompatible with the device's capabilities and characteristics.
 **/
gboolean
nm_device_connection_valid (NMDevice *device, NMConnection *connection)
{
	return nm_device_connection_compatible (device, connection, NULL);
}

gboolean
connection_compatible (NMDevice *device, NMConnection *connection, GError **error)
{
	NMSettingConnection *s_con;
	const char *config_iface, *device_iface;

	s_con = nm_connection_get_setting_connection (connection);
	g_assert (s_con);

	config_iface = nm_setting_connection_get_interface_name (s_con);
	device_iface = nm_device_get_iface (device);
	if (config_iface && g_strcmp0 (config_iface, device_iface) != 0) {
		g_set_error (error, NM_DEVICE_ERROR, NM_DEVICE_ERROR_INTERFACE_MISMATCH,
					 "The interface names of the device and the connection didn't match.");
		return FALSE;
	}

	return TRUE;
}

/**
 * nm_device_connection_compatible:
 * @device: an #NMDevice to validate @connection against
 * @connection: an #NMConnection to validate against @device
 * @error: return location for a #GError, or %NULL
 *
 * Validates a given connection for a given #NMDevice object and returns
 * whether the connection may be activated with the device. For example if
 * @device is a Wi-Fi device that supports only WEP encryption, the connection
 * will only be valid if it is a Wi-Fi connection which describes a WEP or open
 * network, and will not be valid if it describes a WPA network, or if it is
 * an Ethernet, Bluetooth, WWAN, etc connection that is incompatible with the
 * device.
 *
 * This function does the same as nm_device_connection_valid(), i.e. checking
 * compatibility of the given device and connection. But, in addition, it sets
 * GError when FALSE is returned.
 *
 * Returns: %TRUE if the connection may be activated with this device, %FALSE
 * if is incompatible with the device's capabilities and characteristics.
 **/
gboolean
nm_device_connection_compatible (NMDevice *device, NMConnection *connection, GError **error)
{
	g_return_val_if_fail (NM_IS_DEVICE (device), FALSE);
	g_return_val_if_fail (NM_IS_CONNECTION (connection), FALSE);
	g_return_val_if_fail (error == NULL || *error == NULL, FALSE);

	return NM_DEVICE_GET_CLASS (device)->connection_compatible (device, connection, error);
}

/**
 * nm_device_filter_connections:
 * @device: an #NMDevice to filter connections for
 * @connections: (element-type NMConnection): a list of #NMConnection objects to filter
 *
 * Filters a given list of connections for a given #NMDevice object and return
 * connections which may be activated with the device. For example if @device
 * is a Wi-Fi device that supports only WEP encryption, the returned list will
 * contain any Wi-Fi connections in @connections that allow connection to
 * unencrypted or WEP-enabled SSIDs.  The returned list will not contain
 * Ethernet, Bluetooth, Wi-Fi WPA connections, or any other connection that is
 * incompatible with the device. To get the full list of connections see
 * nm_remote_settings_list_connections().
 *
 * Returns: (transfer container) (element-type NMConnection): a
 * list of #NMConnection objects that could be activated with the given @device.
 * The elements of the list are owned by their creator and should not be freed
 * by the caller, but the returned list itself is owned by the caller and should
 * be freed with g_slist_free() when it is no longer required.
 **/
GSList *
nm_device_filter_connections (NMDevice *device, const GSList *connections)
{
	GSList *filtered = NULL;
	const GSList *iter;

	for (iter = connections; iter; iter = g_slist_next (iter)) {
		NMConnection *candidate = NM_CONNECTION (iter->data);

		/* Connection applies to this device */
		if (nm_device_connection_valid (device, candidate))
			filtered = g_slist_prepend (filtered, candidate);
	}

	return g_slist_reverse (filtered);
}

/**
 * nm_device_get_setting_type:
 * @device: an #NMDevice
 *
 * Gets the (primary) #NMSetting subtype associated with connections
 * that can be used on @device.
 *
 * Returns: @device's associated #NMSetting type
 *
 * Since: 0.9.10
 */
GType
nm_device_get_setting_type (NMDevice *device)
{
	g_return_val_if_fail (NM_IS_DEVICE (device), G_TYPE_INVALID);
	g_return_val_if_fail (NM_DEVICE_GET_CLASS (device)->get_setting_type != NULL, G_TYPE_INVALID);

	return NM_DEVICE_GET_CLASS (device)->get_setting_type (device);
}