mirror of
https://gitlab.freedesktop.org/NetworkManager/NetworkManager
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d252a99fa2
The new NMSettingMacsec contains information necessary to establish a MACsec connection. At the moment we support two different MACsec modes, both using wpa_supplicant: PSK and EAP. PSK mode is based on a static CAK key for the MACsec key agreement protocol, while EAP mode derives keys from a 802.1x authentication and thus requires the presence of a NMSetting8021x in the connection.
593 lines
17 KiB
C
593 lines
17 KiB
C
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */
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/*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301 USA.
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*
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* Copyright 2017 Red Hat, Inc.
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*/
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#include "nm-default.h"
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#include "nm-setting-macsec.h"
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#include <stdlib.h>
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#include <string.h>
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#include "nm-utils.h"
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#include "nm-core-types-internal.h"
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#include "nm-setting-connection.h"
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#include "nm-setting-private.h"
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#include "nm-setting-wired.h"
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#include "nm-connection-private.h"
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/**
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* SECTION:nm-setting-macsec
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* @short_description: Describes connection properties for MACSEC interfaces
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*
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* The #NMSettingMacsec object is a #NMSetting subclass that describes properties
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* necessary for connection to MACsec (IEEE 802.1AE) interfaces.
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**/
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G_DEFINE_TYPE_WITH_CODE (NMSettingMacsec, nm_setting_macsec, NM_TYPE_SETTING,
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_nm_register_setting (MACSEC, 1))
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NM_SETTING_REGISTER_TYPE (NM_TYPE_SETTING_MACSEC)
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#define NM_SETTING_MACSEC_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), NM_TYPE_SETTING_MACSEC, NMSettingMacsecPrivate))
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typedef struct {
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char *parent;
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NMSettingMacsecMode mode;
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gboolean encrypt;
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char *mka_cak;
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NMSettingSecretFlags mka_cak_flags;
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char *mka_ckn;
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int port;
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NMSettingMacsecValidation validation;
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} NMSettingMacsecPrivate;
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NM_GOBJECT_PROPERTIES_DEFINE_BASE (
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PROP_PARENT,
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PROP_MODE,
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PROP_ENCRYPT,
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PROP_MKA_CAK,
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PROP_MKA_CAK_FLAGS,
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PROP_MKA_CKN,
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PROP_PORT,
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PROP_VALIDATION,
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);
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/**
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* nm_setting_macsec_new:
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*
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* Creates a new #NMSettingMacsec object with default values.
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*
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* Returns: (transfer full): the new empty #NMSettingMacsec object
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*
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* Since: 1.6
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**/
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NMSetting *
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nm_setting_macsec_new (void)
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{
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return (NMSetting *) g_object_new (NM_TYPE_SETTING_MACSEC, NULL);
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}
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/**
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* nm_setting_macsec_get_parent:
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* @setting: the #NMSettingMacsec
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*
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* Returns: the #NMSettingMacsec:parent property of the setting
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*
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* Since: 1.6
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**/
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const char *
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nm_setting_macsec_get_parent (NMSettingMacsec *setting)
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{
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g_return_val_if_fail (NM_IS_SETTING_MACSEC (setting), NULL);
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return NM_SETTING_MACSEC_GET_PRIVATE (setting)->parent;
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}
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/**
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* nm_setting_macsec_get_mode:
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* @setting: the #NMSettingMacsec
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*
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* Returns: the #NMSettingMacsec:mode property of the setting
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*
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* Since: 1.6
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**/
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NMSettingMacsecMode
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nm_setting_macsec_get_mode (NMSettingMacsec *setting)
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{
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g_return_val_if_fail (NM_IS_SETTING_MACSEC (setting), NM_SETTING_MACSEC_MODE_PSK);
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return NM_SETTING_MACSEC_GET_PRIVATE (setting)->mode;
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}
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/**
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* nm_setting_macsec_get_encrypt:
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* @setting: the #NMSettingMacsec
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*
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* Returns: the #NMSettingMacsec:encrypt property of the setting
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*
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* Since: 1.6
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**/
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gboolean
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nm_setting_macsec_get_encrypt (NMSettingMacsec *setting)
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{
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g_return_val_if_fail (NM_IS_SETTING_MACSEC (setting), TRUE);
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return NM_SETTING_MACSEC_GET_PRIVATE (setting)->encrypt;
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}
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/**
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* nm_setting_macsec_get_mka_cak
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* @setting: the #NMSettingMacsec
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*
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* Returns: the #NMSettingMacsec:mka-cak property of the setting
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*
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* Since: 1.6
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**/
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const char *
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nm_setting_macsec_get_mka_cak (NMSettingMacsec *setting)
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{
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g_return_val_if_fail (NM_IS_SETTING_MACSEC (setting), NULL);
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return NM_SETTING_MACSEC_GET_PRIVATE (setting)->mka_cak;
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}
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/**
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* nm_setting_macsec_get_mka_cak_flags:
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* @setting: the #NMSettingMacsec
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*
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* Returns: the #NMSettingSecretFlags pertaining to the #NMSettingMacsec:mka-cak
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*
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* Since: 1.6
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**/
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NMSettingSecretFlags
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nm_setting_macsec_get_mka_cak_flags (NMSettingMacsec *setting)
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{
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g_return_val_if_fail (NM_IS_SETTING_MACSEC (setting), NM_SETTING_SECRET_FLAG_NONE);
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return NM_SETTING_MACSEC_GET_PRIVATE (setting)->mka_cak_flags;
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}
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/**
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* nm_setting_macsec_get_mka_ckn:
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* @setting: the #NMSettingMacsec
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*
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* Returns: the #NMSettingMacsec:mka-ckn property of the setting
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*
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* Since: 1.6
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**/
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const char *
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nm_setting_macsec_get_mka_ckn (NMSettingMacsec *setting)
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{
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g_return_val_if_fail (NM_IS_SETTING_MACSEC (setting), NULL);
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return NM_SETTING_MACSEC_GET_PRIVATE (setting)->mka_ckn;
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}
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/**
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* nm_setting_macsec_get_port:
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* @setting: the #NMSettingMacsec
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*
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* Returns: the #NMSettingMacsec:port property of the setting
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*
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* Since: 1.6
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**/
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int
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nm_setting_macsec_get_port (NMSettingMacsec *setting)
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{
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g_return_val_if_fail (NM_IS_SETTING_MACSEC (setting), 1);
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return NM_SETTING_MACSEC_GET_PRIVATE (setting)->port;
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}
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/**
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* nm_setting_macsec_get_validation:
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* @setting: the #NMSettingMacsec
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*
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* Returns: the #NMSettingMacsec:validation property of the setting
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*
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* Since: 1.6
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**/
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NMSettingMacsecValidation
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nm_setting_macsec_get_validation (NMSettingMacsec *setting)
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{
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g_return_val_if_fail (NM_IS_SETTING_MACSEC (setting), NM_SETTING_MACSEC_VALIDATION_DISABLE);
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return NM_SETTING_MACSEC_GET_PRIVATE (setting)->validation;
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}
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static GPtrArray *
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need_secrets (NMSetting *setting)
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{
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NMSettingMacsecPrivate *priv = NM_SETTING_MACSEC_GET_PRIVATE (setting);
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GPtrArray *secrets = NULL;
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if (priv->mode == NM_SETTING_MACSEC_MODE_PSK) {
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if ( !priv->mka_cak
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&& !NM_FLAGS_HAS (priv->mka_cak_flags, NM_SETTING_SECRET_FLAG_NOT_REQUIRED)) {
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secrets = g_ptr_array_sized_new (1);
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g_ptr_array_add (secrets, NM_SETTING_MACSEC_MKA_CAK);
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}
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}
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return secrets;
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}
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/*********************************************************************/
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static gboolean
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verify_macsec_key (const char *key, gboolean cak, GError **error)
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{
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int req_len;
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if (!key || !key[0]) {
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g_set_error_literal (error,
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NM_CONNECTION_ERROR,
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NM_CONNECTION_ERROR_INVALID_PROPERTY,
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_("the key is empty"));
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return FALSE;
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}
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req_len = cak ?
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NM_SETTING_MACSEC_MKA_CAK_LENGTH :
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NM_SETTING_MACSEC_MKA_CKN_LENGTH;
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if (strlen (key) != req_len) {
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g_set_error (error,
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NM_CONNECTION_ERROR,
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NM_CONNECTION_ERROR_INVALID_PROPERTY,
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_("the key must be %d characters"), req_len);
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return FALSE;
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}
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if (!NM_STRCHAR_ALL (key, ch, g_ascii_isxdigit (ch))) {
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g_set_error_literal (error,
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NM_CONNECTION_ERROR,
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NM_CONNECTION_ERROR_INVALID_PROPERTY,
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_("the key contais non-hexadecimal characters"));
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return FALSE;
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}
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return TRUE;
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}
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static gboolean
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verify (NMSetting *setting, NMConnection *connection, GError **error)
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{
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NMSettingMacsecPrivate *priv = NM_SETTING_MACSEC_GET_PRIVATE (setting);
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NMSettingConnection *s_con = NULL;
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NMSettingWired *s_wired = NULL;
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NMSetting8021x *s_8021x = NULL;
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if (connection) {
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s_con = nm_connection_get_setting_connection (connection);
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s_wired = nm_connection_get_setting_wired (connection);
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s_8021x = nm_connection_get_setting_802_1x (connection);
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}
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if (priv->parent) {
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if (nm_utils_is_uuid (priv->parent)) {
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/* If we have an NMSettingConnection:master with slave-type="macsec",
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* then it must be the same UUID.
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*/
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if (s_con) {
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const char *master = NULL, *slave_type = NULL;
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slave_type = nm_setting_connection_get_slave_type (s_con);
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if (!g_strcmp0 (slave_type, NM_SETTING_MACSEC_SETTING_NAME))
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master = nm_setting_connection_get_master (s_con);
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if (master && g_strcmp0 (priv->parent, master) != 0) {
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g_set_error (error,
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NM_CONNECTION_ERROR,
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NM_CONNECTION_ERROR_INVALID_PROPERTY,
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_("'%s' value doesn't match '%s=%s'"),
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priv->parent, NM_SETTING_CONNECTION_MASTER, master);
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g_prefix_error (error, "%s.%s: ", NM_SETTING_MACSEC_SETTING_NAME, NM_SETTING_MACSEC_PARENT);
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return FALSE;
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}
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}
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} else if (!nm_utils_iface_valid_name (priv->parent)) {
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/* parent must be either a UUID or an interface name */
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g_set_error (error,
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NM_CONNECTION_ERROR,
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NM_CONNECTION_ERROR_INVALID_PROPERTY,
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_("'%s' is neither an UUID nor an interface name"),
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priv->parent);
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g_prefix_error (error, "%s.%s: ", NM_SETTING_MACSEC_SETTING_NAME, NM_SETTING_MACSEC_PARENT);
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return FALSE;
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}
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} else {
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/* If parent is NULL, the parent must be specified via
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* NMSettingWired:mac-address.
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*/
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if ( connection
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&& (!s_wired || !nm_setting_wired_get_mac_address (s_wired))) {
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g_set_error (error,
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NM_CONNECTION_ERROR,
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NM_CONNECTION_ERROR_MISSING_PROPERTY,
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_("property is not specified and neither is '%s:%s'"),
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NM_SETTING_WIRED_SETTING_NAME, NM_SETTING_WIRED_MAC_ADDRESS);
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g_prefix_error (error, "%s.%s: ", NM_SETTING_MACSEC_SETTING_NAME, NM_SETTING_MACSEC_PARENT);
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return FALSE;
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}
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}
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if (priv->mode == NM_SETTING_MACSEC_MODE_PSK) {
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if (!verify_macsec_key (priv->mka_ckn, FALSE, error)) {
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g_prefix_error (error, "%s.%s: ", NM_SETTING_MACSEC_SETTING_NAME, NM_SETTING_MACSEC_MKA_CKN);
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return FALSE;
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}
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} else if (priv->mode == NM_SETTING_MACSEC_MODE_EAP) {
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if (!s_8021x) {
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g_set_error (error,
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NM_CONNECTION_ERROR,
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NM_CONNECTION_ERROR_MISSING_SETTING,
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_("EAP key management requires '%s' setting presence"),
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NM_SETTING_802_1X_SETTING_NAME);
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g_prefix_error (error, "%s: ", NM_SETTING_MACSEC_SETTING_NAME);
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return FALSE;
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}
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}
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if (priv->port <= 0 || priv->port > 65534) {
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g_set_error (error,
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NM_CONNECTION_ERROR,
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NM_CONNECTION_ERROR_MISSING_PROPERTY,
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_("invalid port %d"),
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priv->port);
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g_prefix_error (error, "%s.%s: ", NM_SETTING_MACSEC_SETTING_NAME, NM_SETTING_MACSEC_PORT);
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return FALSE;
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}
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return TRUE;
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}
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static void
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nm_setting_macsec_init (NMSettingMacsec *setting)
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{
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}
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static void
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set_property (GObject *object, guint prop_id,
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const GValue *value, GParamSpec *pspec)
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{
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NMSettingMacsec *setting = NM_SETTING_MACSEC (object);
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NMSettingMacsecPrivate *priv = NM_SETTING_MACSEC_GET_PRIVATE (setting);
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switch (prop_id) {
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case PROP_PARENT:
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g_free (priv->parent);
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priv->parent = g_value_dup_string (value);
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break;
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case PROP_MODE:
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priv->mode = g_value_get_int (value);
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break;
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case PROP_ENCRYPT:
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priv->encrypt = g_value_get_boolean (value);
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break;
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case PROP_MKA_CAK:
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g_free (priv->mka_cak);
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priv->mka_cak = g_value_dup_string (value);
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break;
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case PROP_MKA_CAK_FLAGS:
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priv->mka_cak_flags = g_value_get_flags (value);
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break;
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case PROP_MKA_CKN:
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g_free (priv->mka_ckn);
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priv->mka_ckn = g_value_dup_string (value);
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break;
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case PROP_PORT:
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priv->port = g_value_get_int (value);
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break;
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case PROP_VALIDATION:
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priv->validation = g_value_get_int (value);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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get_property (GObject *object, guint prop_id,
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GValue *value, GParamSpec *pspec)
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{
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NMSettingMacsec *setting = NM_SETTING_MACSEC (object);
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NMSettingMacsecPrivate *priv = NM_SETTING_MACSEC_GET_PRIVATE (setting);
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switch (prop_id) {
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case PROP_PARENT:
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g_value_set_string (value, priv->parent);
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break;
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case PROP_MODE:
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g_value_set_int (value, priv->mode);
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break;
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case PROP_ENCRYPT:
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g_value_set_boolean (value, priv->encrypt);
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break;
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case PROP_MKA_CAK:
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g_value_set_string (value, priv->mka_cak);
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break;
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case PROP_MKA_CAK_FLAGS:
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g_value_set_flags (value, priv->mka_cak_flags);
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break;
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case PROP_MKA_CKN:
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g_value_set_string (value, priv->mka_ckn);
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break;
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case PROP_PORT:
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g_value_set_int (value, priv->port);
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break;
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case PROP_VALIDATION:
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g_value_set_int (value, priv->validation);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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finalize (GObject *object)
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{
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NMSettingMacsec *setting = NM_SETTING_MACSEC (object);
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NMSettingMacsecPrivate *priv = NM_SETTING_MACSEC_GET_PRIVATE (setting);
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g_free (priv->parent);
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if (priv->mka_cak) {
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memset (priv->mka_cak, 0, strlen (priv->mka_cak));
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g_free (priv->mka_cak);
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}
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g_free (priv->mka_ckn);
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G_OBJECT_CLASS (nm_setting_macsec_parent_class)->finalize (object);
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}
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static void
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nm_setting_macsec_class_init (NMSettingMacsecClass *setting_class)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (setting_class);
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NMSettingClass *parent_class = NM_SETTING_CLASS (setting_class);
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g_type_class_add_private (setting_class, sizeof (NMSettingMacsecPrivate));
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object_class->set_property = set_property;
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object_class->get_property = get_property;
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object_class->finalize = finalize;
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parent_class->verify = verify;
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parent_class->need_secrets = need_secrets;
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/**
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* NMSettingMacsec:parent:
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*
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* If given, specifies the parent interface name or parent connection UUID
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* from which this MACSEC interface should be created. If this property is
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* not specified, the connection must contain an #NMSettingWired setting
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* with a #NMSettingWired:mac-address property.
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*
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* Since: 1.6
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**/
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obj_properties[PROP_PARENT] =
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g_param_spec_string (NM_SETTING_MACSEC_PARENT, "", "",
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NULL,
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G_PARAM_READWRITE |
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G_PARAM_CONSTRUCT |
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NM_SETTING_PARAM_INFERRABLE |
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G_PARAM_STATIC_STRINGS);
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/**
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* NMSettingMacsec:mode:
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*
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* Specifies how the CAK (Connectivity Association Key) for MKA (MACsec Key
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* Agreement) is obtained.
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*
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* Since: 1.6
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**/
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obj_properties[PROP_MODE] =
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g_param_spec_int (NM_SETTING_MACSEC_MODE, "", "",
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G_MININT, G_MAXINT, NM_SETTING_MACSEC_MODE_PSK,
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G_PARAM_READWRITE |
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G_PARAM_CONSTRUCT |
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NM_SETTING_PARAM_INFERRABLE |
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G_PARAM_STATIC_STRINGS);
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|
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/**
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* NMSettingMacsec:encrypt:
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*
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* Whether the transmitted traffic must be encrypted.
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*
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* Since: 1.6
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**/
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obj_properties[PROP_ENCRYPT] =
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g_param_spec_boolean (NM_SETTING_MACSEC_ENCRYPT, "", "",
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TRUE,
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G_PARAM_READWRITE |
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G_PARAM_CONSTRUCT |
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G_PARAM_STATIC_STRINGS);
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/**
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* NMSettingMacsec:mka-cak:
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*
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* The pre-shared CAK (Connectivity Association Key) for MACsec
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* Key Agreement.
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*
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* Since: 1.6
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**/
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obj_properties[PROP_MKA_CAK] =
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g_param_spec_string (NM_SETTING_MACSEC_MKA_CAK, "", "",
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NULL,
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G_PARAM_READWRITE |
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G_PARAM_CONSTRUCT |
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NM_SETTING_PARAM_SECRET |
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G_PARAM_STATIC_STRINGS);
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|
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/**
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* NMSettingMacsec:mka-cak-flags:
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*
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* Flags indicating how to handle the #NMSettingMacsec:mka-cak
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* property.
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*
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* Since: 1.6
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**/
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obj_properties[PROP_MKA_CAK_FLAGS] =
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g_param_spec_flags (NM_SETTING_MACSEC_MKA_CAK_FLAGS, "", "",
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NM_TYPE_SETTING_SECRET_FLAGS,
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NM_SETTING_SECRET_FLAG_NONE,
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G_PARAM_READWRITE |
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G_PARAM_STATIC_STRINGS);
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|
|
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/**
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|
* NMSettingMacsec:mka-ckn:
|
|
*
|
|
* The pre-shared CKN (Connectivity-association Key Name) for
|
|
* MACsec Key Agreement.
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|
*
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|
* Since: 1.6
|
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**/
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obj_properties[PROP_MKA_CKN] =
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g_param_spec_string (NM_SETTING_MACSEC_MKA_CKN, "", "",
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NULL,
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G_PARAM_READWRITE |
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G_PARAM_CONSTRUCT |
|
|
G_PARAM_STATIC_STRINGS);
|
|
|
|
/**
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|
* NMSettingMacsec:port:
|
|
*
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* The port component of the SCI (Secure Channel Identifier), between 1 and 65534.
|
|
*
|
|
* Since: 1.6
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**/
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obj_properties[PROP_PORT] =
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g_param_spec_int (NM_SETTING_MACSEC_PORT, "", "",
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1, 65534, 1,
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G_PARAM_READWRITE |
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G_PARAM_CONSTRUCT |
|
|
NM_SETTING_PARAM_INFERRABLE |
|
|
G_PARAM_STATIC_STRINGS);
|
|
|
|
/**
|
|
* NMSettingMacsec:validation:
|
|
*
|
|
* Specifies the validation mode for incoming frames.
|
|
*
|
|
* Since: 1.6
|
|
**/
|
|
obj_properties[PROP_VALIDATION] =
|
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g_param_spec_int (NM_SETTING_MACSEC_VALIDATION, "", "",
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G_MININT, G_MAXINT, NM_SETTING_MACSEC_VALIDATION_STRICT,
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|
G_PARAM_READWRITE |
|
|
G_PARAM_CONSTRUCT |
|
|
NM_SETTING_PARAM_INFERRABLE |
|
|
G_PARAM_STATIC_STRINGS);
|
|
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g_object_class_install_properties (object_class, _PROPERTY_ENUMS_LAST, obj_properties);
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}
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