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 Socks5CommandResponse}. */ public final class DefaultSocks5CommandResponse extends AbstractSocks5Message implements Socks5CommandResponse { private final Socks5CommandStatus status; private final Socks5AddressType bndAddrType; private final String bndAddr; private final int bndPort; public DefaultSocks5CommandResponse(Socks5CommandStatus status, Socks5AddressType bndAddrType) { this(status, bndAddrType, null, 0); } public DefaultSocks5CommandResponse(Socks5CommandStatus status, Socks5AddressType bndAddrType, String bndAddr, int bndPort) { ObjectUtil.checkNotNull(status, "status"); ObjectUtil.checkNotNull(bndAddrType, "bndAddrType"); if (bndAddr != null) { if (bndAddrType == Socks5AddressType.IPv4) { if (!NetUtil.isValidIpV4Address(bndAddr)) { throw new IllegalArgumentException("bndAddr: " + bndAddr + " (expected: a valid IPv4 address)"); } } else if (bndAddrType == Socks5AddressType.DOMAIN) { bndAddr = IDN.toASCII(bndAddr); if (bndAddr.length() > 255) { throw new IllegalArgumentException("bndAddr: " + bndAddr + " (expected: less than 256 chars)"); } } else if (bndAddrType == Socks5AddressType.IPv6) { if (!NetUtil.isValidIpV6Address(bndAddr)) { throw new IllegalArgumentException("bndAddr: " + bndAddr + " (expected: a valid IPv6 address)"); } } } if (bndPort < 0 || bndPort > 65535) { throw new IllegalArgumentException("bndPort: " + bndPort + " (expected: 0~65535)"); } this.status = status; this.bndAddrType = bndAddrType; this.bndAddr = bndAddr; this.bndPort = bndPort; } @Override public Socks5CommandStatus status() { return status; } @Override public Socks5AddressType bndAddrType() { return bndAddrType; } @Override public String bndAddr() { return bndAddr; } @Override public int bndPort() { return bndPort; } @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(", status: "); } else { buf.append("(status: "); } buf.append(status()); buf.append(", bndAddrType: "); buf.append(bndAddrType()); buf.append(", bndAddr: "); buf.append(bndAddr()); buf.append(", bndPort: "); buf.append(bndPort()); buf.append(')'); return buf.toString(); } }