安卓：扫描TCP套接字服务器的IP（端口IST知） [英] Android: Scanning for TCP socket server IP (Port ist known)

问题描述

我在扫描我的子网插槽服务器与港口7打开和使用并行线程。我总是看到一个镜头连接，并在服务器端断开，所以基本code应该没问题。

但我怎么收集发现（成功连接）服务器的IP在一个阵列？

任何帮助将是很大的AP preciated！

 公共类MainActivity延伸活动{
按钮buttonConnect;

Socket套接字= NULL;
INT口= 7;
INT超时= 200;

最后ExecutorService的ES = Executors.newFixedThreadPool（20）;

@覆盖
保护无效的onCreate（包savedInstanceState）{
    super.onCreate（savedInstanceState）;
    的setContentView（R.layout.activity_main）;

    buttonConnect =（按钮）findViewById（R.id.button1）;

    buttonConnect.setOnClickListener（buttonConnectOnClickListener）;

}

Button.OnClickListener buttonConnectOnClickListener =新Button.OnClickListener（）{

    @覆盖
    公共无效的onClick（视图v）{

        字符串iIPv4 =192.168.0.1;
        iIPv4 = iIPv4.substring（0，iIPv4.lastIndexOf（）。）;
        iIPv4 + =;

        的for（int i = 1; I＆LT; 255;我++）{
            findSocket（ES，iIPv4 + I，端口，超时）;
        }
    }
};

公共静态未来＆LT;布尔＆GT; findSocket（最终的ExecutorService上课，
        最后弦乐IP，最终诠释口，最终诠释超时）{
    返回es.submit（新的可赎回＆LT;布尔＆GT;（）{
        @覆盖
        公共布尔调用（）{
            尝试 {
                Socket套接字=新的Socket（）;
                socket.connect（新InetSocketAddress（IP，端口），超时）;
                socket.close（）;
                返回true;
            }赶上（例外前）{
                返回false;
            }
        }
    }）;
}
 

}

解决方案

 的ArrayList＆LT;字符串＆GT; ArrayList的=新的ArrayList＆LT;字符串＆GT;（）;
 

然后在尝试 findSocket 块之前返回true;

  arayList.add（IP）;
 

I'm scanning my subnet for socket servers with port 7 open and using parallel threads. I always see a shot "connect" and "disconnect" on the server side, so the basic code should be OK.

But how do i collect the found (successfully connected) server IPs in an array?

Any help would be greatly appreciated!

public class MainActivity extends Activity{
Button buttonConnect;

Socket socket = null;
int port = 7;
int timeout = 200;

final ExecutorService es = Executors.newFixedThreadPool(20);

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    buttonConnect = (Button) findViewById(R.id.button1);

    buttonConnect.setOnClickListener(buttonConnectOnClickListener);

}

Button.OnClickListener buttonConnectOnClickListener = new Button.OnClickListener() {

    @Override
    public void onClick(View v) {

        String iIPv4 = "192.168.0.1";
        iIPv4 = iIPv4.substring(0, iIPv4.lastIndexOf("."));
        iIPv4 += ".";

        for (int i = 1; i < 255; i++) {
            findSocket(es, iIPv4 + i, port, timeout);
        }
    }
};

public static Future<Boolean> findSocket(final ExecutorService es,
        final String ip, final int port, final int timeout) {
    return es.submit(new Callable<Boolean>() {
        @Override
        public Boolean call() {
            try {
                Socket socket = new Socket();
                socket.connect(new InetSocketAddress(ip, port), timeout);
                socket.close();
                return true;
            } catch (Exception ex) {
                return false;
            }
        }
    });
}

}

解决方案

ArrayList<String> arrayList = new ArrayList<String>();

then in the try block of findSocket before return true;

arayList.add(ip);

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