io.netty.handler.codec.socksx.v4.DefaultSocks4CommandResponse 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.v4;

import io.netty.handler.codec.DecoderResult;
import io.netty.util.NetUtil;
import io.netty.util.internal.ObjectUtil;
import io.netty.util.internal.StringUtil;

/**
 * The default {@link Socks4CommandResponse}.
 */
public class DefaultSocks4CommandResponse extends AbstractSocks4Message implements Socks4CommandResponse {

    private final Socks4CommandStatus status;
    private final String dstAddr;
    private final int dstPort;

    /**
     * Creates a new instance.
     *
     * @param status the status of the response
     */
    public DefaultSocks4CommandResponse(Socks4CommandStatus status) {
        this(status, null, 0);
    }

    /**
     * Creates a new instance.
     *
     * @param status the status of the response
     * @param dstAddr the {@code DSTIP} field of the response
     * @param dstPort the {@code DSTPORT} field of the response
     */
    public DefaultSocks4CommandResponse(Socks4CommandStatus status, String dstAddr, int dstPort) {
        if (dstAddr != null) {
            if (!NetUtil.isValidIpV4Address(dstAddr)) {
                throw new IllegalArgumentException(
                        "dstAddr: " + dstAddr + " (expected: a valid IPv4 address)");
            }
        }
        if (dstPort < 0 || dstPort > 65535) {
            throw new IllegalArgumentException("dstPort: " + dstPort + " (expected: 0~65535)");
        }

        this.status = ObjectUtil.checkNotNull(status, "cmdStatus");
        this.dstAddr = dstAddr;
        this.dstPort = dstPort;
    }

    @Override
    public Socks4CommandStatus status() {
        return status;
    }

    @Override
    public String dstAddr() {
        return dstAddr;
    }

    @Override
    public int dstPort() {
        return dstPort;
    }

    @Override
    public String toString() {
        StringBuilder buf = new StringBuilder(96);
        buf.append(StringUtil.simpleClassName(this));

        DecoderResult decoderResult = decoderResult();
        if (!decoderResult.isSuccess()) {
            buf.append("(decoderResult: ");
            buf.append(decoderResult);
            buf.append(", dstAddr: ");
        } else {
            buf.append("(dstAddr: ");
        }
        buf.append(dstAddr());
        buf.append(", dstPort: ");
        buf.append(dstPort());
        buf.append(')');

        return buf.toString();
    }
}