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Diffstat (limited to 'libnm/nm-device-tun.c')
| -rw-r--r-- | libnm/nm-device-tun.c | 439 |
1 files changed, 439 insertions, 0 deletions
diff --git a/libnm/nm-device-tun.c b/libnm/nm-device-tun.c new file mode 100644 index 00000000..ce2558f0 --- /dev/null +++ b/libnm/nm-device-tun.c @@ -0,0 +1,439 @@ +/* -*- 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 2015 Red Hat, Inc. + */ + +#include "config.h" + +#include <string.h> +#include <arpa/inet.h> + +#include <nm-setting-connection.h> +#include <nm-setting-tun.h> +#include <nm-utils.h> + +#include "nm-default.h" +#include "nm-device-tun.h" +#include "nm-device-private.h" +#include "nm-object-private.h" + +G_DEFINE_TYPE (NMDeviceTun, nm_device_tun, NM_TYPE_DEVICE) + +#define NM_DEVICE_TUN_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), NM_TYPE_DEVICE_TUN, NMDeviceTunPrivate)) + +typedef struct { + char *hw_address; + char *mode; + gint64 owner; + gint64 group; + gboolean no_pi; + gboolean vnet_hdr; + gboolean multi_queue; +} NMDeviceTunPrivate; + +enum { + PROP_0, + PROP_HW_ADDRESS, + PROP_MODE, + PROP_OWNER, + PROP_GROUP, + PROP_NO_PI, + PROP_VNET_HDR, + PROP_MULTI_QUEUE, + + LAST_PROP +}; + +/** + * nm_device_tun_get_hw_address: + * @device: a #NMDeviceTun + * + * Gets the hardware (MAC) address of the #NMDeviceTun + * + * Returns: the hardware address. This is the internal string used by the + * device, and must not be modified. + * + * Since: 1.2 + **/ +const char * +nm_device_tun_get_hw_address (NMDeviceTun *device) +{ + g_return_val_if_fail (NM_IS_DEVICE_TUN (device), NULL); + + return NM_DEVICE_TUN_GET_PRIVATE (device)->hw_address; +} + +/** + * nm_device_tun_get_mode: + * @device: a #NMDeviceTun + * + * Returns the TUN/TAP mode for the device. + * + * Returns: 'tun' or 'tap' + * + * Since: 1.2 + **/ +const char * +nm_device_tun_get_mode (NMDeviceTun *device) +{ + g_return_val_if_fail (NM_IS_DEVICE_TUN (device), NULL); + + return NM_DEVICE_TUN_GET_PRIVATE (device)->mode; +} + +/** + * nm_device_tun_get_owner: + * @device: a #NMDeviceTun + * + * Gets the tunnel owner. + * + * Returns: the uid of the tunnel owner, or -1 if it has no owner. + * + * Since: 1.2 + **/ +gint64 +nm_device_tun_get_owner (NMDeviceTun *device) +{ + g_return_val_if_fail (NM_IS_DEVICE_TUN (device), -1); + + return NM_DEVICE_TUN_GET_PRIVATE (device)->owner; +} + +/** + * nm_device_tun_get_group: + * @device: a #NMDeviceTun + * + * Gets the tunnel group. + * + * Returns: the gid of the tunnel group, or -1 if it has no owner. + * + * Since: 1.2 + **/ +gint64 +nm_device_tun_get_group (NMDeviceTun *device) +{ + g_return_val_if_fail (NM_IS_DEVICE_TUN (device), -1); + + return NM_DEVICE_TUN_GET_PRIVATE (device)->group; +} + +/** + * nm_device_tun_get_pi: + * @device: a #NMDeviceTun + * + * Returns whether the #NMDeviceTun has the IFF_NO_PI flag. + * + * Returns: %TRUE if the device has the flag, %FALSE otherwise + * + * Since: 1.2 + **/ +gboolean +nm_device_tun_get_no_pi (NMDeviceTun *device) +{ + g_return_val_if_fail (NM_IS_DEVICE_TUN (device), FALSE); + + return NM_DEVICE_TUN_GET_PRIVATE (device)->no_pi; +} + +/** + * nm_device_tun_get_vnet_hdr: + * @device: a #NMDeviceTun + * + * Returns whether the #NMDeviceTun has the IFF_VNET_HDR flag. + * + * Returns: %TRUE if the device has the flag, %FALSE otherwise + * + * Since: 1.2 + **/ +gboolean +nm_device_tun_get_vnet_hdr (NMDeviceTun *device) +{ + g_return_val_if_fail (NM_IS_DEVICE_TUN (device), FALSE); + + return NM_DEVICE_TUN_GET_PRIVATE (device)->vnet_hdr; +} + +/** + * nm_device_tun_get_multi_queue: + * @device: a #NMDeviceTun + * + * Returns whether the #NMDeviceTun has the IFF_MULTI_QUEUE flag. + * + * Returns: %TRUE if the device doesn't have the flag, %FALSE otherwise + * + * Since: 1.2 + **/ +gboolean +nm_device_tun_get_multi_queue (NMDeviceTun *device) +{ + g_return_val_if_fail (NM_IS_DEVICE_TUN (device), FALSE); + + return NM_DEVICE_TUN_GET_PRIVATE (device)->multi_queue; +} + +static int +tun_mode_from_string (const char *string) +{ + if (!g_strcmp0 (string, "tap")) + return NM_SETTING_TUN_MODE_TAP; + else + return NM_SETTING_TUN_MODE_TUN; +} + +static gboolean +connection_compatible (NMDevice *device, NMConnection *connection, GError **error) +{ + NMDeviceTunPrivate *priv = NM_DEVICE_TUN_GET_PRIVATE (device); + NMSettingTunMode mode; + NMSettingTun *s_tun; + + if (!NM_DEVICE_CLASS (nm_device_tun_parent_class)->connection_compatible (device, connection, error)) + return FALSE; + + if (!nm_connection_is_type (connection, NM_SETTING_TUN_SETTING_NAME)) { + g_set_error_literal (error, NM_DEVICE_ERROR, NM_DEVICE_ERROR_INCOMPATIBLE_CONNECTION, + _("The connection was not a tun connection.")); + return FALSE; + } + + s_tun = nm_connection_get_setting_tun (connection); + + mode = tun_mode_from_string (priv->mode); + if (s_tun && mode != nm_setting_tun_get_mode (s_tun)) { + g_set_error_literal (error, NM_DEVICE_ERROR, NM_DEVICE_ERROR_INCOMPATIBLE_CONNECTION, + _("The mode of the device and the connection didn't match")); + return FALSE; + } + + return TRUE; +} + +static GType +get_setting_type (NMDevice *device) +{ + return NM_TYPE_SETTING_TUN; +} + +static const char * +get_hw_address (NMDevice *device) +{ + return nm_device_tun_get_hw_address (NM_DEVICE_TUN (device)); +} + +/***********************************************************/ + +static void +nm_device_tun_init (NMDeviceTun *device) +{ + _nm_device_set_device_type (NM_DEVICE (device), NM_DEVICE_TYPE_TUN); +} + +static void +init_dbus (NMObject *object) +{ + NMDeviceTunPrivate *priv = NM_DEVICE_TUN_GET_PRIVATE (object); + const NMPropertiesInfo property_info[] = { + { NM_DEVICE_TUN_HW_ADDRESS, &priv->hw_address }, + { NM_DEVICE_TUN_MODE, &priv->mode }, + { NM_DEVICE_TUN_OWNER, &priv->owner }, + { NM_DEVICE_TUN_GROUP, &priv->group }, + { NM_DEVICE_TUN_NO_PI, &priv->no_pi }, + { NM_DEVICE_TUN_VNET_HDR, &priv->vnet_hdr }, + { NM_DEVICE_TUN_MULTI_QUEUE, &priv->multi_queue }, + { NULL }, + }; + + NM_OBJECT_CLASS (nm_device_tun_parent_class)->init_dbus (object); + + _nm_object_register_properties (object, + NM_DBUS_INTERFACE_DEVICE_TUN, + property_info); +} + +static void +finalize (GObject *object) +{ + NMDeviceTunPrivate *priv = NM_DEVICE_TUN_GET_PRIVATE (object); + + g_free (priv->mode); + + G_OBJECT_CLASS (nm_device_tun_parent_class)->finalize (object); +} + +static void +get_property (GObject *object, + guint prop_id, + GValue *value, + GParamSpec *pspec) +{ + NMDeviceTun *device = NM_DEVICE_TUN (object); + + switch (prop_id) { + case PROP_HW_ADDRESS: + g_value_set_string (value, nm_device_tun_get_hw_address (device)); + break; + case PROP_MODE: + g_value_set_string (value, nm_device_tun_get_mode (device)); + break; + case PROP_OWNER: + g_value_set_int64 (value, nm_device_tun_get_owner (device)); + break; + case PROP_GROUP: + g_value_set_int64 (value, nm_device_tun_get_group (device)); + break; + case PROP_NO_PI: + g_value_set_boolean (value, nm_device_tun_get_no_pi (device)); + break; + case PROP_VNET_HDR: + g_value_set_boolean (value, nm_device_tun_get_vnet_hdr (device)); + break; + case PROP_MULTI_QUEUE: + g_value_set_boolean (value, nm_device_tun_get_multi_queue (device)); + break; + + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); + break; + } +} + +static void +nm_device_tun_class_init (NMDeviceTunClass *gre_class) +{ + GObjectClass *object_class = G_OBJECT_CLASS (gre_class); + NMObjectClass *nm_object_class = NM_OBJECT_CLASS (gre_class); + NMDeviceClass *device_class = NM_DEVICE_CLASS (gre_class); + + g_type_class_add_private (gre_class, sizeof (NMDeviceTunPrivate)); + + _nm_object_class_add_interface (nm_object_class, NM_DBUS_INTERFACE_DEVICE_TUN); + + /* virtual methods */ + object_class->finalize = finalize; + object_class->get_property = get_property; + + nm_object_class->init_dbus = init_dbus; + + device_class->connection_compatible = connection_compatible; + device_class->get_setting_type = get_setting_type; + device_class->get_hw_address = get_hw_address; + + /* properties */ + + /** + * NMDeviceTun:hw-address: + * + * The hardware (MAC) address of the device. + * + * Since: 1.2 + **/ + g_object_class_install_property + (object_class, PROP_HW_ADDRESS, + g_param_spec_string (NM_DEVICE_TUN_HW_ADDRESS, "", "", + NULL, + G_PARAM_READABLE | + G_PARAM_STATIC_STRINGS)); + + /** + * NMDeviceTun:mode: + * + * The tunnel mode, either "tun" or "tap". + * + * Since: 1.2 + **/ + g_object_class_install_property + (object_class, PROP_MODE, + g_param_spec_string (NM_DEVICE_TUN_MODE, "", "", + NULL, + G_PARAM_READABLE | + G_PARAM_STATIC_STRINGS)); + + /** + * NMDeviceTun:owner: + * + * The uid of the tunnel owner, or -1 if it has no owner. + * + * Since: 1.2 + **/ + g_object_class_install_property + (object_class, PROP_OWNER, + g_param_spec_int64 (NM_DEVICE_TUN_OWNER, "", "", + -1, G_MAXUINT32, -1, + G_PARAM_READABLE | + G_PARAM_STATIC_STRINGS)); + + /** + * NMDeviceTun:group: + * + * The gid of the tunnel group, or -1 if it has no owner. + * + * Since: 1.2 + **/ + g_object_class_install_property + (object_class, PROP_GROUP, + g_param_spec_int64 (NM_DEVICE_TUN_GROUP, "", "", + -1, G_MAXUINT32, -1, + G_PARAM_READABLE | + G_PARAM_STATIC_STRINGS)); + + /** + * NMDeviceTun:no-pi: + * + * The tunnel's "TUN_NO_PI" flag; true if no protocol info is + * prepended to the tunnel packets. + * + * Since: 1.2 + **/ + g_object_class_install_property + (object_class, PROP_NO_PI, + g_param_spec_boolean (NM_DEVICE_TUN_NO_PI, "", "", + FALSE, + G_PARAM_READABLE | + G_PARAM_STATIC_STRINGS)); + + /** + * NMDeviceTun:vnet-hdr: + * + * The tunnel's "TUN_VNET_HDR" flag; true if the tunnel packets + * include a virtio network header. + * + * Since: 1.2 + **/ + g_object_class_install_property + (object_class, PROP_VNET_HDR, + g_param_spec_boolean (NM_DEVICE_TUN_VNET_HDR, "", "", + FALSE, + G_PARAM_READABLE | + G_PARAM_STATIC_STRINGS)); + + /** + * NMDeviceTun:multi-queue: + * + * The tunnel's "TUN_TAP_MQ" flag; true if callers can connect to + * the tap device multiple times, for multiple send/receive + * queues. + * + * Since: 1.2 + **/ + g_object_class_install_property + (object_class, PROP_MULTI_QUEUE, + g_param_spec_boolean (NM_DEVICE_TUN_MULTI_QUEUE, "", "", + FALSE, + G_PARAM_READABLE | + G_PARAM_STATIC_STRINGS)); +} |