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我必须编写一个简单的 Java 聊天服务器，在其中存储对等 IP 地址的列表。当我发送消息时，我必须遍历每个地址并将其发送给每个对等方。这是我的代码：

import java.util.*;
import java.net.*;
import java.io.*;

class ChatServer{

static LinkedList<String> peerList;
static int port;
private final static int PACKETSIZE = 100;

public static void main(String args[]){

    peerList = new LinkedList<String>();

    peerList.add("127.0.0.1");
    peerList.add("192.168.0.100");

    try{
        InetAddress inetAddress = InetAddress.getLocalHost();
        port = Integer.parseInt(args[0]);

        DatagramSocket clientSocket = new DatagramSocket(port, inetAddress);

        BufferedReader br = (new BufferedReader(new InputStreamReader(System.in)));
        String msg;

        byte[] sendData = new byte[PACKETSIZE];
        byte[] receiveData = new byte[PACKETSIZE];

        while(true){
            System.out.println("Enter your message: ");
            msg = br.readLine() + "\r\n";
            sendData = msg.getBytes();

            itr = peerList.listIterator(0);
            while (itr.hasNext()){
                DatagramPacket sendPacket = new DatagramPacket(sendData, sendData.length, inetAddress.getByName(itr.next().toString()), port);
                clientSocket.send(sendPacket);
            }

            DatagramPacket receivePacket = new DatagramPacket(receiveData, receiveData.length, inetAddress, port);
            clientSocket.receive(receivePacket);
            System.out.println("FROM:" + receivePacket.getAddress() + ":" + new String(receivePacket.getData()));

        }
    }
    catch(Exception e){
        System.out.println(e.getMessage());
    }
}
}

如您所见，我使用 localhost 和本地 IP 地址进行了尝试，并收到了消息：

"Cannot assign requested address: Datagram send failed".

我发现问题出在本地主机上，就好像我把它拿出来一样，消息会发送到我的本地地址。我已经检查并仔细检查了我的 etc/hosts 文件，并且 localhost 配置正确，即“ 127.0.0.1 localhost”。控制台肯定是以管理员身份运行的。我也在禁用防火墙的情况下尝试了它，所以不是这样。

有谁知道这可能是什么原因造成的？

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