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/*
* Copyright (C) 2023 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.net.module.util;
/**
* Class to centralize feature version control that requires a specific module or a specific
* module version.
* @hide
*/
public class FeatureVersions {
/**
* This constant is used to do bitwise shift operation to create module ids.
* The module version is composed with 9 digits which is placed in the lower 36 bits.
*/
private static final int MODULE_SHIFT = 36;
/**
* The bitmask to do bitwise-and(i.e. {@code &}) operation to get the module id.
*/
public static final long MODULE_MASK = 0xFF0_0000_0000L;
/**
* The bitmask to do bitwise-and(i.e. {@code &}) operation to get the module version.
*/
public static final long VERSION_MASK = 0x00F_FFFF_FFFFL;
public static final long CONNECTIVITY_MODULE_ID = 0x01L << MODULE_SHIFT;
public static final long NETWORK_STACK_MODULE_ID = 0x02L << MODULE_SHIFT;
// CLAT_ADDRESS_TRANSLATE is a feature of the network stack, which doesn't throw when system
// try to add a NAT-T keepalive packet filter with v6 address, introduced in version
// M-2023-Sept on July 3rd, 2023.
public static final long FEATURE_CLAT_ADDRESS_TRANSLATE =
NETWORK_STACK_MODULE_ID + 34_09_00_000L;
}
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