Java tutorial
/* * Copyright 2012 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.v5; import io.netty.handler.codec.DecoderResult; import io.netty.util.NetUtil; import io.netty.util.internal.ObjectUtil; import io.netty.util.internal.StringUtil; import java.net.IDN; /** * The default {@link Socks5CommandRequest}. */ public final class DefaultSocks5CommandRequest extends AbstractSocks5Message implements Socks5CommandRequest { private final Socks5CommandType type; private final Socks5AddressType dstAddrType; private final String dstAddr; private final int dstPort; public DefaultSocks5CommandRequest(Socks5CommandType type, Socks5AddressType dstAddrType, String dstAddr, int dstPort) { this.type = ObjectUtil.checkNotNull(type, "type"); ObjectUtil.checkNotNull(dstAddrType, "dstAddrType"); ObjectUtil.checkNotNull(dstAddr, "dstAddr"); if (dstAddrType == Socks5AddressType.IPv4) { if (!NetUtil.isValidIpV4Address(dstAddr)) { throw new IllegalArgumentException("dstAddr: " + dstAddr + " (expected: a valid IPv4 address)"); } } else if (dstAddrType == Socks5AddressType.DOMAIN) { dstAddr = IDN.toASCII(dstAddr); if (dstAddr.length() > 255) { throw new IllegalArgumentException("dstAddr: " + dstAddr + " (expected: less than 256 chars)"); } } else if (dstAddrType == Socks5AddressType.IPv6) { if (!NetUtil.isValidIpV6Address(dstAddr)) { throw new IllegalArgumentException("dstAddr: " + dstAddr + " (expected: a valid IPv6 address"); } } if (dstPort < 0 || dstPort > 65535) { throw new IllegalArgumentException("dstPort: " + dstPort + " (expected: 0~65535)"); } this.dstAddrType = dstAddrType; this.dstAddr = dstAddr; this.dstPort = dstPort; } @Override public Socks5CommandType type() { return type; } @Override public Socks5AddressType dstAddrType() { return dstAddrType; } @Override public String dstAddr() { return dstAddr; } @Override public int dstPort() { return dstPort; } @Override public String toString() { StringBuilder buf = new StringBuilder(128); buf.append(StringUtil.simpleClassName(this)); DecoderResult decoderResult = decoderResult(); if (!decoderResult.isSuccess()) { buf.append("(decoderResult: "); buf.append(decoderResult); buf.append(", type: "); } else { buf.append("(type: "); } buf.append(type()); buf.append(", dstAddrType: "); buf.append(dstAddrType()); buf.append(", dstAddr: "); buf.append(dstAddr()); buf.append(", dstPort: "); buf.append(dstPort()); buf.append(')'); return buf.toString(); } }