Java tutorial
/* * Copyright 2013 The Netty Project * * The Netty Project licenses this file to you 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 io.netty.handler.codec.socksx; /** * The version of SOCKS protocol. */ public enum SocksVersion { /** * SOCKS protocol version 4a (or 4) */ SOCKS4a((byte) 0x04), /** * SOCKS protocol version 5 */ SOCKS5((byte) 0x05), /** * Unknown protocol version */ UNKNOWN((byte) 0xff); /** * Returns the {@link SocksVersion} that corresponds to the specified version field value, * as defined in the protocol specification. * * @return {@link #UNKNOWN} if the specified value does not represent a known SOCKS protocol version */ public static SocksVersion valueOf(byte b) { if (b == SOCKS4a.byteValue()) { return SOCKS4a; } if (b == SOCKS5.byteValue()) { return SOCKS5; } return UNKNOWN; } private final byte b; SocksVersion(byte b) { this.b = b; } /** * Returns the value of the version field, as defined in the protocol specification. */ public byte byteValue() { return b; } }