io.netty.handler.codec.socksx.v5.DefaultSocks5CommandRequest Maven / Gradle / Ivy

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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up with different versions on classes on the class path).

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/*
 * 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:
 *
 *   https://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();
    }
}