// SPDX-License-Identifier: GPL-2.0+

/*

 * Copyright (C) 2013 Red Hat, Inc.

 */

#include "nm-default.h"

#include <stdlib.h>

#include "nm-device-veth.h"

#include "nm-device-private.h"

#include "nm-manager.h"

#include "platform/nm-platform.h"

#include "nm-device-factory.h"

#include "nm-device-logging.h"

_LOG_DECLARE_SELF(NMDeviceVeth);

/*****************************************************************************/

struct _NMDeviceVeth {

	NMDeviceEthernet parent;

};

struct _NMDeviceVethClass {

	NMDeviceEthernetClass parent;

};

NM_GOBJECT_PROPERTIES_DEFINE (NMDeviceVeth,

	PROP_PEER,

);

/*****************************************************************************/

G_DEFINE_TYPE (NMDeviceVeth, nm_device_veth, NM_TYPE_DEVICE_ETHERNET)

/*****************************************************************************/

static void

update_properties (NMDevice *device)

{

	NMDevice *peer;

	int ifindex, peer_ifindex;

	ifindex = nm_device_get_ifindex (device);

	if (!nm_platform_link_veth_get_properties (nm_device_get_platform (device), ifindex, &peer_ifindex))

		peer_ifindex = 0;

	nm_device_parent_set_ifindex (device, peer_ifindex);

	peer = nm_device_parent_get_device (device);

	if (   peer

	    && NM_IS_DEVICE_VETH (peer)

	    && nm_device_parent_get_ifindex (peer) <= 0)

		update_properties (peer);

}

static gboolean

can_unmanaged_external_down (NMDevice *self)

{

	/* Unless running in a container, an udev rule causes these to be

	 * unmanaged. If there's no udev then we're probably in a container

	 * and should IFF_UP and configure the veth ourselves even if we

	 * didn't create it. */

	return FALSE;

}

static void

link_changed (NMDevice *device,

              const NMPlatformLink *pllink)

{

	NM_DEVICE_CLASS (nm_device_veth_parent_class)->link_changed (device, pllink);

	update_properties (device);

}

/*****************************************************************************/

static void

nm_device_veth_init (NMDeviceVeth *self)

{

}

static void

parent_changed_notify (NMDevice *device,

                       int old_ifindex,

                       NMDevice *old_parent,

                       int new_ifindex,

                       NMDevice *new_parent)

{

	NM_DEVICE_CLASS (nm_device_veth_parent_class)->parent_changed_notify (device,

	                                                                      old_ifindex,

	                                                                      old_parent,

	                                                                      new_ifindex,

	                                                                      new_parent);

	_notify (NM_DEVICE_VETH (device), PROP_PEER);

}

static void

get_property (GObject *object, guint prop_id,

              GValue *value, GParamSpec *pspec)

{

	NMDeviceVeth *self = NM_DEVICE_VETH (object);

	NMDevice *peer;

	switch (prop_id) {

	case PROP_PEER:

		peer = nm_device_parent_get_device (NM_DEVICE (self));

		if (peer && !NM_IS_DEVICE_VETH (peer))

			peer = NULL;

		nm_dbus_utils_g_value_set_object_path (value, peer);

		break;

	default:

		G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);

		break;

	}

}

static const NMDBusInterfaceInfoExtended interface_info_device_veth = {

	.parent = NM_DEFINE_GDBUS_INTERFACE_INFO_INIT (

		NM_DBUS_INTERFACE_DEVICE_VETH,

		.signals = NM_DEFINE_GDBUS_SIGNAL_INFOS (

			&nm_signal_info_property_changed_legacy,

		),

		.properties = NM_DEFINE_GDBUS_PROPERTY_INFOS (

			NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L ("Peer", "o", NM_DEVICE_VETH_PEER),

		),

	),

	.legacy_property_changed = TRUE,

};

static void

nm_device_veth_class_init (NMDeviceVethClass *klass)

{

	GObjectClass *object_class = G_OBJECT_CLASS (klass);

	NMDBusObjectClass *dbus_object_class = NM_DBUS_OBJECT_CLASS (klass);

	NMDeviceClass *device_class = NM_DEVICE_CLASS (klass);

	object_class->get_property = get_property;

	dbus_object_class->interface_infos = NM_DBUS_INTERFACE_INFOS (&interface_info_device_veth);

	device_class->connection_type_supported = NULL;

	device_class->link_types = NM_DEVICE_DEFINE_LINK_TYPES (NM_LINK_TYPE_VETH);

	device_class->can_unmanaged_external_down = can_unmanaged_external_down;

	device_class->link_changed = link_changed;

	device_class->parent_changed_notify = parent_changed_notify;

	obj_properties[PROP_PEER] =

	    g_param_spec_string (NM_DEVICE_VETH_PEER, "", "",

	                         NULL,

	                         G_PARAM_READABLE |

	                         G_PARAM_STATIC_STRINGS);

	g_object_class_install_properties (object_class, _PROPERTY_ENUMS_LAST, obj_properties);

}

/*****************************************************************************/

#define NM_TYPE_VETH_DEVICE_FACTORY (nm_veth_device_factory_get_type ())

#define NM_VETH_DEVICE_FACTORY(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), NM_TYPE_VETH_DEVICE_FACTORY, NMVethDeviceFactory))

static NMDevice *

create_device (NMDeviceFactory *factory,

               const char *iface,

               const NMPlatformLink *plink,

               NMConnection *connection,

               gboolean *out_ignore)

{

	return (NMDevice *) g_object_new (NM_TYPE_DEVICE_VETH,

	                                  NM_DEVICE_IFACE, iface,

	                                  NM_DEVICE_TYPE_DESC, "Veth",

	                                  NM_DEVICE_DEVICE_TYPE, NM_DEVICE_TYPE_VETH,

	                                  NM_DEVICE_LINK_TYPE, NM_LINK_TYPE_VETH,

	                                  NULL);

}

NM_DEVICE_FACTORY_DEFINE_INTERNAL (VETH, Veth, veth,

	NM_DEVICE_FACTORY_DECLARE_LINK_TYPES (NM_LINK_TYPE_VETH),

	factory_class->create_device = create_device;

);