如何解决Java socket 端口复用调用connect方法时的:invalid argument问题？

  • Z时代
  • 2024-02-10
  • 分类：IT

刚学java socket编程，轻喷

server side防火墙打开
client side防火墙打开
server side两个端口有serversocket listen
client side用两个socket实现端口复用后分别连接serversocket端口时
client side挂掉了

//client side
// import java.io.BufferedReader;
import java.io.IOException;
import java.net.InetSocketAddress;
// import java.io.InputStreamReader;
// import java.net.ServerSocket;
import java.net.Socket;
import java.net.StandardSocketOptions;
import java.net.UnknownHostException;
public class TestTcp {
    public static void main(String args[]) throws UnknownHostException, IOException
    {
        Socket failhelp=new Socket();
        failhelp.setOption(StandardSocketOptions.SO_REUSEADDR, true);
        failhelp.setOption(StandardSocketOptions.SO_REUSEPORT, true);
        // testsuc.bind(new InetSocketAddress("localhost", failhelp.getLocalPort()));
        failhelp.connect(new InetSocketAddress("ServerIp",5130));
        Socket testsuc=new Socket();
        testsuc.setOption(StandardSocketOptions.SO_REUSEADDR, true);
        testsuc.setOption(StandardSocketOptions.SO_REUSEPORT, true);
        testsuc.bind(new InetSocketAddress("localhost", failhelp.getLocalPort()));
        testsuc.connect(new InetSocketAddress("ServerIp",39001));
        //可以绑一个端口了
        //但是报错invalid argument
        testsuc.close();
        failhelp.close();
        // listener.close();
        System.out.println("SUC\n");
    }
}
//文明的曙光了属于是
//只要实现了一榜多，那么理论上是可以实现的
//1. 服务器一个，先连接
//2. 交换A,B公网地址和端口
//3. A,B引线多绑server
//4. A,B对发，只要不被都丢掉就行
//server side
import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.StandardSocketOptions;
public class Test {
    public static void main(String args[]) throws IOException, InterruptedException
    {
        ServerSocket listener=new ServerSocket(5130);
        ServerSocket gngd=new ServerSocket(39001);
        Socket failhelp=listener.accept();
        failhelp.setOption(StandardSocketOptions.SO_REUSEADDR, true);
        failhelp.setOption(StandardSocketOptions.SO_REUSEPORT, true);
        // Socket rnmmp=new Socket(failhelp.getInetAddress(),failhelp.getPort(),failhelp.getLocalAddress(),failhelp.getLocalPort());
        Socket fuck=gngd.accept();
        System.out.println("SUC\n");
        listener.close();
        failhelp.close();
        fuck.close();
        gngd.close();
    }
}

报错：

Exception in thread "main" java.net.SocketException: Invalid argument
        at java.base/sun.nio.ch.Net.connect0(Native Method)
        at java.base/sun.nio.ch.Net.connect(Net.java:579)
        at java.base/sun.nio.ch.Net.connect(Net.java:568)
        at java.base/sun.nio.ch.NioSocketImpl.connect(NioSocketImpl.java:585)
        at java.base/java.net.SocksSocketImpl.connect(SocksSocketImpl.java:327)
        at java.base/java.net.Socket.connect(Socket.java:633)
        at java.base/java.net.Socket.connect(Socket.java:583)
        at TestTcp.main(TestTcp.java:24)//具体在testsuc.connect(...)时出问题

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