diff options
Diffstat (limited to 'common/device/com/android/net/module/util/wear/NetPacketHelpers.java')
-rw-r--r-- | common/device/com/android/net/module/util/wear/NetPacketHelpers.java | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/common/device/com/android/net/module/util/wear/NetPacketHelpers.java b/common/device/com/android/net/module/util/wear/NetPacketHelpers.java new file mode 100644 index 00000000..341c44be --- /dev/null +++ b/common/device/com/android/net/module/util/wear/NetPacketHelpers.java @@ -0,0 +1,41 @@ +/* + * 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.wear; + +import com.android.net.module.util.async.ReadableByteBuffer; + +/** + * Implements utilities for decoding parts of TCP/UDP/IP headers. + * + * @hide + */ +final class NetPacketHelpers { + static void encodeNetworkUnsignedInt16(int value, byte[] dst, final int dstPos) { + dst[dstPos] = (byte) ((value >> 8) & 0xFF); + dst[dstPos + 1] = (byte) (value & 0xFF); + } + + static int decodeNetworkUnsignedInt16(byte[] data, final int pos) { + return ((data[pos] & 0xFF) << 8) | (data[pos + 1] & 0xFF); + } + + static int decodeNetworkUnsignedInt16(ReadableByteBuffer data, final int pos) { + return ((data.peek(pos) & 0xFF) << 8) | (data.peek(pos + 1) & 0xFF); + } + + private NetPacketHelpers() {} +} |