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NetworkManager/src/core/devices/nm-device-vlan.c
Thomas Haller fdf9614ba7
build: move "libnm-core/" to "src/" and split it 
"libnm-core/" is rather complicated. It provides a static library that
is linked into libnm.so and NetworkManager. It also contains public
headers (like "nm-setting.h") which are part of public libnm API.

Then we have helper libraries ("libnm-core/nm-libnm-core-*/") which
only rely on public API of libnm-core, but are themself static
libraries that can be used by anybody who uses libnm-core. And
"libnm-core/nm-libnm-core-intern" is used by libnm-core itself.

Move "libnm-core/" to "src/". But also split it in different
directories so that they have a clearer purpose.

The goal is to have a flat directory hierarchy. The "src/libnm-core*/"
directories correspond to the different modules (static libraries and set
of headers that we have). We have different kinds of such modules because
of how we combine various code together. The directory layout now reflects
this.
2021-02-18 19:46:51 +01:00

688 lines
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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Copyright (C) 2011 - 2012 Red Hat, Inc.
*/
#include "src/core/nm-default-daemon.h"
#include "nm-device-vlan.h"
#include <sys/socket.h>
#include "nm-manager.h"
#include "nm-utils.h"
#include "NetworkManagerUtils.h"
#include "nm-device-private.h"
#include "settings/nm-settings.h"
#include "nm-act-request.h"
#include "nm-ip4-config.h"
#include "platform/nm-platform.h"
#include "nm-device-factory.h"
#include "nm-manager.h"
#include "libnm-core-intern/nm-core-internal.h"
#include "platform/nmp-object.h"
#define _NMLOG_DEVICE_TYPE NMDeviceVlan
#include "nm-device-logging.h"
/*****************************************************************************/
NM_GOBJECT_PROPERTIES_DEFINE(NMDeviceVlan, PROP_VLAN_ID, );
typedef struct {
gulong parent_state_id;
gulong parent_hwaddr_id;
gulong parent_mtu_id;
guint vlan_id;
} NMDeviceVlanPrivate;
struct _NMDeviceVlan {
NMDevice parent;
NMDeviceVlanPrivate _priv;
};
struct _NMDeviceVlanClass {
NMDeviceClass parent;
};
G_DEFINE_TYPE(NMDeviceVlan, nm_device_vlan, NM_TYPE_DEVICE)
#define NM_DEVICE_VLAN_GET_PRIVATE(self) \
_NM_GET_PRIVATE(self, NMDeviceVlan, NM_IS_DEVICE_VLAN, NMDevice)
/*****************************************************************************/
static void
parent_state_changed(NMDevice * parent,
NMDeviceState new_state,
NMDeviceState old_state,
NMDeviceStateReason reason,
gpointer user_data)
{
NMDeviceVlan *self = NM_DEVICE_VLAN(user_data);
/* We'll react to our own carrier state notifications. Ignore the parent's. */
if (nm_device_state_reason_check(reason) == NM_DEVICE_STATE_REASON_CARRIER)
return;
nm_device_set_unmanaged_by_flags(NM_DEVICE(self),
NM_UNMANAGED_PARENT,
!nm_device_get_managed(parent, FALSE),
reason);
}
static void
parent_mtu_maybe_changed(NMDevice *parent, GParamSpec *pspec, gpointer user_data)
{
/* the MTU of a VLAN device is limited by the parent's MTU.
*
* When the parent's MTU changes, try to re-set the MTU. */
nm_device_commit_mtu(user_data);
}
static void
parent_hwaddr_maybe_changed(NMDevice *parent, GParamSpec *pspec, gpointer user_data)
{
NMDevice * device = NM_DEVICE(user_data);
NMDeviceVlan * self = NM_DEVICE_VLAN(device);
NMConnection * connection;
const char * new_mac, *old_mac;
NMSettingIPConfig *s_ip6;
/* Never touch assumed devices */
if (nm_device_sys_iface_state_is_external_or_assume(device))
return;
connection = nm_device_get_applied_connection(device);
if (!connection)
return;
/* Update the VLAN MAC only if configuration does not specify one */
if (nm_device_hw_addr_is_explict(device))
return;
old_mac = nm_device_get_hw_address(device);
new_mac = nm_device_get_hw_address(parent);
if (nm_streq0(old_mac, new_mac))
return;
_LOGD(LOGD_VLAN,
"parent hardware address changed to %s%s%s",
NM_PRINT_FMT_QUOTE_STRING(new_mac));
if (new_mac) {
nm_device_hw_addr_set(device, new_mac, "vlan-parent", TRUE);
nm_device_arp_announce(device);
/* When changing the hw address the interface is taken down,
* removing the IPv6 configuration; reapply it.
*/
s_ip6 = nm_connection_get_setting_ip6_config(connection);
if (s_ip6)
nm_device_reactivate_ip_config(device, AF_INET6, s_ip6, s_ip6);
}
}
static void
parent_changed_notify(NMDevice *device,
int old_ifindex,
NMDevice *old_parent,
int new_ifindex,
NMDevice *new_parent)
{
NMDeviceVlan * self = NM_DEVICE_VLAN(device);
NMDeviceVlanPrivate *priv = NM_DEVICE_VLAN_GET_PRIVATE(self);
NM_DEVICE_CLASS(nm_device_vlan_parent_class)
->parent_changed_notify(device, old_ifindex, old_parent, new_ifindex, new_parent);
/* note that @self doesn't have to clear @parent_state_id on dispose,
* because NMDevice's dispose() will unset the parent, which in turn calls
* parent_changed_notify(). */
nm_clear_g_signal_handler(old_parent, &priv->parent_state_id);
nm_clear_g_signal_handler(old_parent, &priv->parent_hwaddr_id);
nm_clear_g_signal_handler(old_parent, &priv->parent_mtu_id);
if (new_parent) {
priv->parent_state_id = g_signal_connect(new_parent,
NM_DEVICE_STATE_CHANGED,
G_CALLBACK(parent_state_changed),
device);
priv->parent_hwaddr_id = g_signal_connect(new_parent,
"notify::" NM_DEVICE_HW_ADDRESS,
G_CALLBACK(parent_hwaddr_maybe_changed),
device);
parent_hwaddr_maybe_changed(new_parent, NULL, self);
priv->parent_mtu_id = g_signal_connect(new_parent,
"notify::" NM_DEVICE_MTU,
G_CALLBACK(parent_mtu_maybe_changed),
device);
parent_mtu_maybe_changed(new_parent, NULL, self);
/* Set parent-dependent unmanaged flag */
nm_device_set_unmanaged_by_flags(device,
NM_UNMANAGED_PARENT,
!nm_device_get_managed(new_parent, FALSE),
NM_DEVICE_STATE_REASON_PARENT_MANAGED_CHANGED);
}
/* Recheck availability now that the parent has changed */
if (new_ifindex > 0) {
nm_device_queue_recheck_available(device,
NM_DEVICE_STATE_REASON_PARENT_CHANGED,
NM_DEVICE_STATE_REASON_PARENT_CHANGED);
}
}
static void
update_properties(NMDevice *device)
{
NMDeviceVlanPrivate * priv;
const NMPlatformLink * plink = NULL;
const NMPlatformLnkVlan *plnk = NULL;
int ifindex;
int parent_ifindex = 0;
guint vlan_id;
g_return_if_fail(NM_IS_DEVICE_VLAN(device));
priv = NM_DEVICE_VLAN_GET_PRIVATE(device);
ifindex = nm_device_get_ifindex(device);
if (ifindex > 0)
plnk = nm_platform_link_get_lnk_vlan(nm_device_get_platform(device), ifindex, &plink);
if (plnk && plink->parent > 0)
parent_ifindex = plink->parent;
g_object_freeze_notify((GObject *) device);
nm_device_parent_set_ifindex(device, parent_ifindex);
vlan_id = plnk ? plnk->id : 0;
if (vlan_id != priv->vlan_id) {
priv->vlan_id = vlan_id;
_notify((NMDeviceVlan *) device, PROP_VLAN_ID);
}
g_object_thaw_notify((GObject *) device);
}
static void
link_changed(NMDevice *device, const NMPlatformLink *pllink)
{
NM_DEVICE_CLASS(nm_device_vlan_parent_class)->link_changed(device, pllink);
update_properties(device);
}
static gboolean
create_and_realize(NMDevice * device,
NMConnection * connection,
NMDevice * parent,
const NMPlatformLink **out_plink,
GError ** error)
{
NMDeviceVlanPrivate *priv = NM_DEVICE_VLAN_GET_PRIVATE(device);
const char * iface = nm_device_get_iface(device);
NMSettingVlan * s_vlan;
int parent_ifindex;
guint vlan_id;
int r;
s_vlan = nm_connection_get_setting_vlan(connection);
g_assert(s_vlan);
if (!parent) {
g_set_error(error,
NM_DEVICE_ERROR,
NM_DEVICE_ERROR_MISSING_DEPENDENCIES,
"VLAN devices can not be created without a parent interface");
return FALSE;
}
parent_ifindex = nm_device_get_ifindex(parent);
if (parent_ifindex <= 0) {
g_set_error(error,
NM_DEVICE_ERROR,
NM_DEVICE_ERROR_MISSING_DEPENDENCIES,
"cannot retrieve ifindex of interface %s (%s)",
nm_device_get_iface(parent),
nm_device_get_type_desc(parent));
return FALSE;
}
if (!nm_device_supports_vlans(parent)) {
g_set_error(error,
NM_DEVICE_ERROR,
NM_DEVICE_ERROR_FAILED,
"no support for VLANs on interface %s of type %s",
nm_device_get_iface(parent),
nm_device_get_type_desc(parent));
return FALSE;
}
vlan_id = nm_setting_vlan_get_id(s_vlan);
r = nm_platform_link_vlan_add(nm_device_get_platform(device),
iface,
parent_ifindex,
vlan_id,
nm_setting_vlan_get_flags(s_vlan),
out_plink);
if (r < 0) {
g_set_error(error,
NM_DEVICE_ERROR,
NM_DEVICE_ERROR_CREATION_FAILED,
"Failed to create VLAN interface '%s' for '%s': %s",
iface,
nm_connection_get_id(connection),
nm_strerror(r));
return FALSE;
}
nm_device_parent_set_ifindex(device, parent_ifindex);
if (vlan_id != priv->vlan_id) {
priv->vlan_id = vlan_id;
_notify((NMDeviceVlan *) device, PROP_VLAN_ID);
}
return TRUE;
}
static void
unrealize_notify(NMDevice *device)
{
NMDeviceVlan * self = NM_DEVICE_VLAN(device);
NMDeviceVlanPrivate *priv = NM_DEVICE_VLAN_GET_PRIVATE(self);
NM_DEVICE_CLASS(nm_device_vlan_parent_class)->unrealize_notify(device);
if (priv->vlan_id != 0) {
priv->vlan_id = 0;
_notify(self, PROP_VLAN_ID);
}
}
/*****************************************************************************/
static NMDeviceCapabilities
get_generic_capabilities(NMDevice *device)
{
/* We assume VLAN interfaces always support carrier detect */
return NM_DEVICE_CAP_CARRIER_DETECT | NM_DEVICE_CAP_IS_SOFTWARE;
}
/*****************************************************************************/
static gboolean
is_available(NMDevice *device, NMDeviceCheckDevAvailableFlags flags)
{
if (!nm_device_parent_get_device(device))
return FALSE;
return NM_DEVICE_CLASS(nm_device_vlan_parent_class)->is_available(device, flags);
}
/*****************************************************************************/
static gboolean
check_connection_compatible(NMDevice *device, NMConnection *connection, GError **error)
{
NMDeviceVlanPrivate *priv = NM_DEVICE_VLAN_GET_PRIVATE(device);
NMSettingVlan * s_vlan;
const char * parent;
if (!NM_DEVICE_CLASS(nm_device_vlan_parent_class)
->check_connection_compatible(device, connection, error))
return FALSE;
if (nm_device_is_real(device)) {
s_vlan = nm_connection_get_setting_vlan(connection);
if (nm_setting_vlan_get_id(s_vlan) != priv->vlan_id) {
nm_utils_error_set_literal(error,
NM_UTILS_ERROR_CONNECTION_AVAILABLE_TEMPORARY,
"vlan id setting mismatches");
return FALSE;
}
/* Check parent interface; could be an interface name or a UUID */
parent = nm_setting_vlan_get_parent(s_vlan);
if (parent) {
if (!nm_device_match_parent(device, parent)) {
nm_utils_error_set_literal(error,
NM_UTILS_ERROR_CONNECTION_AVAILABLE_TEMPORARY,
"vlan parent setting differs");
return FALSE;
}
} else {
/* Parent could be a MAC address in an NMSettingWired */
if (!nm_device_match_parent_hwaddr(device, connection, TRUE)) {
nm_utils_error_set_literal(error,
NM_UTILS_ERROR_CONNECTION_AVAILABLE_TEMPORARY,
"vlan parent mac setting differs");
return FALSE;
}
}
}
return TRUE;
}
static gboolean
check_connection_available(NMDevice * device,
NMConnection * connection,
NMDeviceCheckConAvailableFlags flags,
const char * specific_object,
GError ** error)
{
if (!nm_device_is_real(device))
return TRUE;
return NM_DEVICE_CLASS(nm_device_vlan_parent_class)
->check_connection_available(device, connection, flags, specific_object, error);
}
static gboolean
complete_connection(NMDevice * device,
NMConnection * connection,
const char * specific_object,
NMConnection *const *existing_connections,
GError ** error)
{
NMSettingVlan *s_vlan;
nm_utils_complete_generic(nm_device_get_platform(device),
connection,
NM_SETTING_VLAN_SETTING_NAME,
existing_connections,
NULL,
_("VLAN connection"),
NULL,
NULL,
TRUE);
s_vlan = nm_connection_get_setting_vlan(connection);
if (!s_vlan) {
g_set_error_literal(error,
NM_DEVICE_ERROR,
NM_DEVICE_ERROR_INVALID_CONNECTION,
"A 'vlan' setting is required.");
return FALSE;
}
/* If there's no VLAN interface, no parent, and no hardware address in the
* settings, then there's not enough information to complete the setting.
*/
if (!nm_setting_vlan_get_parent(s_vlan)
&& !nm_device_match_parent_hwaddr(device, connection, TRUE)) {
g_set_error_literal(
error,
NM_DEVICE_ERROR,
NM_DEVICE_ERROR_INVALID_CONNECTION,
"The 'vlan' setting had no interface name, parent, or hardware address.");
return FALSE;
}
return TRUE;
}
static void
update_connection(NMDevice *device, NMConnection *connection)
{
NMDeviceVlanPrivate * priv = NM_DEVICE_VLAN_GET_PRIVATE(device);
NMSettingVlan * s_vlan = nm_connection_get_setting_vlan(connection);
int ifindex = nm_device_get_ifindex(device);
const NMPlatformLink *plink;
const NMPObject * polnk;
guint vlan_id;
guint vlan_flags;
if (!s_vlan) {
s_vlan = (NMSettingVlan *) nm_setting_vlan_new();
nm_connection_add_setting(connection, (NMSetting *) s_vlan);
}
polnk = nm_platform_link_get_lnk(nm_device_get_platform(device),
ifindex,
NM_LINK_TYPE_VLAN,
&plink);
if (polnk)
vlan_id = polnk->lnk_vlan.id;
else
vlan_id = priv->vlan_id;
if (vlan_id != nm_setting_vlan_get_id(s_vlan))
g_object_set(s_vlan, NM_SETTING_VLAN_ID, vlan_id, NULL);
g_object_set(s_vlan,
NM_SETTING_VLAN_PARENT,
nm_device_parent_find_for_connection(device, nm_setting_vlan_get_parent(s_vlan)),
NULL);
if (polnk)
vlan_flags = polnk->lnk_vlan.flags;
else
vlan_flags = NM_VLAN_FLAG_REORDER_HEADERS;
if (vlan_flags != nm_setting_vlan_get_flags(s_vlan))
g_object_set(s_vlan, NM_SETTING_VLAN_FLAGS, (NMVlanFlags) vlan_flags, NULL);
if (polnk) {
_nm_setting_vlan_set_priorities(s_vlan,
NM_VLAN_INGRESS_MAP,
polnk->_lnk_vlan.ingress_qos_map,
polnk->_lnk_vlan.n_ingress_qos_map);
_nm_setting_vlan_set_priorities(s_vlan,
NM_VLAN_EGRESS_MAP,
polnk->_lnk_vlan.egress_qos_map,
polnk->_lnk_vlan.n_egress_qos_map);
} else {
_nm_setting_vlan_set_priorities(s_vlan, NM_VLAN_INGRESS_MAP, NULL, 0);
_nm_setting_vlan_set_priorities(s_vlan, NM_VLAN_EGRESS_MAP, NULL, 0);
}
}
static NMActStageReturn
act_stage1_prepare(NMDevice *device, NMDeviceStateReason *out_failure_reason)
{
NMDevice * parent_device;
NMSettingVlan *s_vlan;
/* Change MAC address to parent's one if needed */
parent_device = nm_device_parent_get_device(device);
if (parent_device) {
parent_hwaddr_maybe_changed(parent_device, NULL, device);
parent_mtu_maybe_changed(parent_device, NULL, device);
}
s_vlan = nm_device_get_applied_setting(device, NM_TYPE_SETTING_VLAN);
if (s_vlan) {
gs_free NMVlanQosMapping *ingress_map = NULL;
gs_free NMVlanQosMapping *egress_map = NULL;
guint n_ingress_map = 0;
guint n_egress_map = 0;
_nm_setting_vlan_get_priorities(s_vlan, NM_VLAN_INGRESS_MAP, &ingress_map, &n_ingress_map);
_nm_setting_vlan_get_priorities(s_vlan, NM_VLAN_EGRESS_MAP, &egress_map, &n_egress_map);
nm_platform_link_vlan_change(nm_device_get_platform(device),
nm_device_get_ifindex(device),
NM_VLAN_FLAGS_ALL,
nm_setting_vlan_get_flags(s_vlan),
TRUE,
ingress_map,
n_ingress_map,
TRUE,
egress_map,
n_egress_map);
}
return NM_ACT_STAGE_RETURN_SUCCESS;
}
/*****************************************************************************/
static void
get_property(GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
{
NMDeviceVlanPrivate *priv = NM_DEVICE_VLAN_GET_PRIVATE(object);
switch (prop_id) {
case PROP_VLAN_ID:
g_value_set_uint(value, priv->vlan_id);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
break;
}
}
/*****************************************************************************/
static void
nm_device_vlan_init(NMDeviceVlan *self)
{}
static const NMDBusInterfaceInfoExtended interface_info_device_vlan = {
.parent = NM_DEFINE_GDBUS_INTERFACE_INFO_INIT(
NM_DBUS_INTERFACE_DEVICE_VLAN,
.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("HwAddress",
"s",
NM_DEVICE_HW_ADDRESS),
NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Carrier", "b", NM_DEVICE_CARRIER),
NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("Parent", "o", NM_DEVICE_PARENT),
NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE_L("VlanId",
"u",
NM_DEVICE_VLAN_ID), ), ),
.legacy_property_changed = TRUE,
};
static void
nm_device_vlan_class_init(NMDeviceVlanClass *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_vlan);
device_class->connection_type_supported = NM_SETTING_VLAN_SETTING_NAME;
device_class->connection_type_check_compatible = NM_SETTING_VLAN_SETTING_NAME;
device_class->link_types = NM_DEVICE_DEFINE_LINK_TYPES(NM_LINK_TYPE_VLAN);
device_class->mtu_parent_delta = 0; /* VLANs can have the same MTU of parent */
device_class->create_and_realize = create_and_realize;
device_class->link_changed = link_changed;
device_class->unrealize_notify = unrealize_notify;
device_class->get_generic_capabilities = get_generic_capabilities;
device_class->act_stage1_prepare_set_hwaddr_ethernet = TRUE;
device_class->act_stage1_prepare = act_stage1_prepare;
device_class->get_configured_mtu = nm_device_get_configured_mtu_wired_parent;
device_class->is_available = is_available;
device_class->parent_changed_notify = parent_changed_notify;
device_class->check_connection_compatible = check_connection_compatible;
device_class->check_connection_available = check_connection_available;
device_class->complete_connection = complete_connection;
device_class->update_connection = update_connection;
obj_properties[PROP_VLAN_ID] = g_param_spec_uint(NM_DEVICE_VLAN_ID,
"",
"",
0,
4095,
0,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
g_object_class_install_properties(object_class, _PROPERTY_ENUMS_LAST, obj_properties);
}
/*****************************************************************************/
#define NM_TYPE_VLAN_DEVICE_FACTORY (nm_vlan_device_factory_get_type())
#define NM_VLAN_DEVICE_FACTORY(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj), NM_TYPE_VLAN_DEVICE_FACTORY, NMVlanDeviceFactory))
static NMDevice *
create_device(NMDeviceFactory * factory,
const char * iface,
const NMPlatformLink *plink,
NMConnection * connection,
gboolean * out_ignore)
{
return g_object_new(NM_TYPE_DEVICE_VLAN,
NM_DEVICE_IFACE,
iface,
NM_DEVICE_DRIVER,
"8021q",
NM_DEVICE_TYPE_DESC,
"VLAN",
NM_DEVICE_DEVICE_TYPE,
NM_DEVICE_TYPE_VLAN,
NM_DEVICE_LINK_TYPE,
NM_LINK_TYPE_VLAN,
NULL);
}
static const char *
get_connection_parent(NMDeviceFactory *factory, NMConnection *connection)
{
NMSettingVlan * s_vlan;
NMSettingWired *s_wired;
const char * parent = NULL;
g_return_val_if_fail(nm_connection_is_type(connection, NM_SETTING_VLAN_SETTING_NAME), NULL);
s_vlan = nm_connection_get_setting_vlan(connection);
g_assert(s_vlan);
parent = nm_setting_vlan_get_parent(s_vlan);
if (parent)
return parent;
/* Try the hardware address from the VLAN connection's hardware setting */
s_wired = nm_connection_get_setting_wired(connection);
if (s_wired)
return nm_setting_wired_get_mac_address(s_wired);
return NULL;
}
static char *
get_connection_iface(NMDeviceFactory *factory, NMConnection *connection, const char *parent_iface)
{
const char * ifname;
NMSettingVlan *s_vlan;
g_return_val_if_fail(nm_connection_is_type(connection, NM_SETTING_VLAN_SETTING_NAME), NULL);
s_vlan = nm_connection_get_setting_vlan(connection);
g_assert(s_vlan);
if (!parent_iface)
return NULL;
ifname = nm_connection_get_interface_name(connection);
if (ifname)
return g_strdup(ifname);
/* If the connection doesn't specify the interface name for the VLAN
* device, we create one for it using the VLAN ID and the parent
* interface's name.
*/
return nm_utils_new_vlan_name(parent_iface, nm_setting_vlan_get_id(s_vlan));
}
NM_DEVICE_FACTORY_DEFINE_INTERNAL(
VLAN,
Vlan,
vlan,
NM_DEVICE_FACTORY_DECLARE_LINK_TYPES(NM_LINK_TYPE_VLAN)
NM_DEVICE_FACTORY_DECLARE_SETTING_TYPES(NM_SETTING_VLAN_SETTING_NAME),
factory_class->create_device = create_device;
factory_class->get_connection_parent = get_connection_parent;
factory_class->get_connection_iface = get_connection_iface;);
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