java - Kryonet 客户端连接问题 Java

Question

我有一个 kryonet 客户端/服务器，可以正常工作......大部分情况下。客户端保持空闲状态，并在一段时间后最终断开连接，但这不是我当前试图解决的问题。目前，只要客户端和服务器在同一台计算机上，服务器和客户端就可以建立连接并来回发送数据(在客户端超时之前)。如果您尝试连接到 LAN 上的另一台计算机，连接会超时并失败。

这是我的问题:

1. 导致连接问题的可能原因是什么？

2. 让客户活下去的正确方法是什么？ (次要目标，但如果你知道它，那就太好了)

*我为此使用 LibGDX 和 Kryonet。据我所知，他们应该不会有任何冲突。

服务器:

package com.me.mygdxgame;
import java.io.IOException;
import java.util.ArrayList;

import com.badlogic.gdx.math.Vector2;
import com.esotericsoftware.kryonet.Connection;
import com.esotericsoftware.kryonet.Listener;
import com.esotericsoftware.kryonet.Server;
import com.me.mygdxgame.Network.Obstacles;

public class GameServer {
    Server server;

    public GameServer () throws IOException {
        server = new Server() {
            protected Connection newConnection () {
                return new PlayerConnection();
            }
        };
        Network.register(server);


        //Sends Stuff to Client
        server.addListener(new Listener() {
            public void received (Connection c, Object object) {
                PlayerConnection connection = (PlayerConnection)c;

                if (object instanceof Obstacles) {
                    if (connection.name != null) return;
                    ArrayList<Vector2> obs = ((Obstacles)object).obstacles;
                    if (obs == null) return;
                    System.out.println("Obstacles recieved.");
                    for(int i = 0; i < obs.size(); i++) 
                        System.out.println("Obstacle " + i + "- x: " + obs.get(i).x  );
                    return;
                }
            }
        });


        server.bind(Network.port);
        server.start();

    }

    public void sendAll () { //Send out data
        Obstacles ob = new Obstacles();
        ob.obstacles = new ArrayList<Vector2>();
        for(int i =0; i < Map.obstacles.size(); i++){
            ob.obstacles.add(new Vector2(Map.obstacles.get(i).x,Map.obstacles.get(i).y));
        }
        server.sendToAllTCP(ob);
    }

    static class PlayerConnection extends Connection {
        public String name;
    }
}

客户:

package com.me.mygdxgame;

import java.awt.EventQueue;
import java.io.IOException;
import java.net.Inet4Address;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.ArrayList;

import com.badlogic.gdx.ApplicationListener;
import com.esotericsoftware.kryonet.Client;
import com.esotericsoftware.kryonet.Connection;
import com.esotericsoftware.kryonet.Listener;
import com.me.mygdxgame.Network.Obstacles;

public class GameClient implements ApplicationListener{
    Client client;
    String name;
    String RefreshHost;
    boolean Connected = false;
    ArrayList<String> hosts = new ArrayList<String>();
    public static String host;

    public GameClient (String host) {
        client = new Client();
        client.start();
        this.host = host;

        Network.register(client);

        client.addListener(new Listener() {
            public void connected (Connection connection) {
                System.out.println("connected");
                Connected = true;
            }

            public void received (Connection connection, Object object) {
                if (object instanceof Obstacles) {
                    Obstacles obs = (Obstacles)object;
                    System.out.println("Obstacle recieved on client - " + obs.obstacles.size());
                    client.sendTCP(obs);
                    System.out.println("Obstacles sent back.");
                    return;
                }else {
                    System.out.println("invalid packet");
                }
            }

            public void disconnected (Connection connection) {
                EventQueue.invokeLater(new Runnable() {
                    public void run () {
                        System.out.println("closed");
                        Connected = false;
                        client.close();
                    }
                });
            }
        });

        new Thread("Connect") {
            public void run () {
                try {
                    client.connect(5000, GameClient.host, Network.port);
                    System.out.println("Connected!");
                    client.setKeepAliveTCP(NORM_PRIORITY);
                    while(Connected) {
                        //System.out.println(client.isIdle());
                    }
                    client.run();
                } catch (IOException ex) {
                    ex.printStackTrace();
                }
            }
        }.start();
    }

    @Override
    public void create() {
        // TODO Auto-generated method stub

    }

    @Override
    public void resize(int width, int height) {
        // TODO Auto-generated method stub

    }

    @Override
    public void render() {
        // TODO Auto-generated method stub

    }

    @Override
    public void pause() {
        // TODO Auto-generated method stub

    }

    @Override
    public void resume() {
        // TODO Auto-generated method stub

    }

    @Override
    public void dispose() {
        // TODO Auto-generated method stub

    }
}

Answer 1

我建议您在启动客户端之前设置主机

   public GameClient (String host) {
        client = new Client();
        this.host = host;
        client.start();

我不熟悉 kryonet 客户端，但这样做是有意义的。

通常确保您的客户端正在尝试连接到运行服务器的主机...