com.alibaba.rocketmq.common.utils.ChannelUtil Maven / Gradle / Ivy

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/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF 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 com.alibaba.rocketmq.common.utils;

import io.netty.channel.Channel;

import java.net.InetAddress;
import java.net.InetSocketAddress;

public class ChannelUtil {
    public static String getRemoteIp(Channel channel) {
        InetSocketAddress inetSocketAddress = (InetSocketAddress) channel.remoteAddress();
        if (inetSocketAddress == null) {
            return "";
        }
        final InetAddress inetAddr = inetSocketAddress.getAddress();
        return (inetAddr != null ? inetAddr.getHostAddress() : inetSocketAddress.getHostName());
    }

}