JSchException超时:未建立套接字 [英] JSchException timeout: socket is not established

问题描述

我正在尝试使用 JSch 通过ssh连接到我的计算机，然后运行命令.

I am trying to use JSch to connect to my computer through ssh and then run a command.

但是，当我运行代码时，我从未连接到计算机.以及以下错误:

However, when I run the code I never connect to the computer. and the following error:

I/System.out: com.jcraft.jsch.JSchException: timeout: socket is not established

这是我的相关代码:

protected void sshTesting(){
    String name = "";
    String userName = "kalenpw";
    String password = "hunter2";
    String ip = "192.168.0.4";
    int port = 22;
    String command = "cmus-remote -u";

    try{
        JSch jsch = new JSch();
        Session session = jsch.getSession(userName, ip, port);
        session.setPassword(password);
        session.setConfig("StrictHostKeyChecking", "no");


        System.out.println("Establishing connection");
        session.connect(10);

        Channel channel = session.openChannel("exec");
        ((ChannelExec)channel).setCommand(command);
        channel.setInputStream(null);
        channel.connect(10000);

//            name = session.getUserName();
//            System.out.println(session.getHost());


    }
    catch(Exception e){
        System.err.print(e);
        System.out.print(e);
    }        

}

这是我第一次使用JSch，因此我几乎只是关注他们的一个例子 JSch/SSHJ-连接到SSH服务器按钮，不幸的是，我的代码看起来像是以类似的方式建立了连接，但没有结果.我已经正常测试了SSH进入计算机的过程，并且可以正常工作，因此我不认为问题出在服务器上，而在我的代码上.

This is my first time using JSch so I am pretty much just following one of their examples Exec.java. I have found this answer JSch/SSHJ - Connecting to SSH server on button click which unfortunately my code looks like it is establishing a connection in a similar fashion yet with no results. I have tested SSHing into my computer normally and it works fine so I don't believe the issue is with the server, but with my code.

这是整个堆栈跟踪:

W/System.err: com.jcraft.jsch.JSchException: timeout: socket is not establishedcom.jcraft.jsch.JSchException: timeout: socket is not established
W/System.err:     at com.jcraft.jsch.Util.createSocket(Util.java:394)
W/System.err:     at com.jcraft.jsch.Session.connect(Session.java:215)
W/System.err:     at com.example.kalenpw.myfirstapp.RectangleClickActivity.sshTesting(RectangleClickActivity.java:97)
W/System.err:     at com.example.kalenpw.myfirstapp.RectangleClickActivity$1.onCheckedChanged(RectangleClickActivity.java:56)
W/System.err:     at android.widget.CompoundButton.setChecked(CompoundButton.java:165)
W/System.err:     at android.widget.Switch.setChecked(Switch.java:1151)
W/System.err:     at android.widget.Switch.toggle(Switch.java:1146)
W/System.err:     at android.widget.CompoundButton.performClick(CompoundButton.java:123)
W/System.err:     at android.view.View$PerformClick.run(View.java:22589)
W/System.err:     at android.os.Handler.handleCallback(Handler.java:739)
W/System.err:     at android.os.Handler.dispatchMessage(Handler.java:95)
W/System.err:     at android.os.Looper.loop(Looper.java:148)
W/System.err:     at android.app.ActivityThread.main(ActivityThread.java:7325)
W/System.err:     at java.lang.reflect.Method.invoke(Native Method)
W/System.err:     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)
W/System.err:     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)

RectangleClickActivity.java是我正在测试SSH的文件.

RectangleClickActivity.java is the file I am testing SSH.

第97行是:session.connect(10);

第56行是:sshTesting();

推荐答案

问题最终是因为我将配置设置为session.setConfig("StrictHostKeyChecking", "no");，但是由于某些原因，您需要创建一个配置并设置StrictHostKeyChecking，然后添加它配置为会话，而不是直接设置会话.

The issue ended up being I was setting the config to session.setConfig("StrictHostKeyChecking", "no");, but for some reason you need to create a config and set the StrictHostKeyChecking and then add that config to the session instead of just setting it directly.

工作代码如下:

protected void sshTesting(){
    String name = "";
    String userName = "kalenpw";
    String password = "hunter2";
    String ip = "192.168.0.4";
    int port = 22;
    String command = "cmus-remote -u";

    try{
        JSch jsch = new JSch();
        Session session = jsch.getSession(userName, ip, port);
        session.setPassword(password);

        //Missing code
        java.util.Properties config = new java.util.Properties();
        config.put("StrictHostKeyChecking", "no");
        session.setConfig(config);
        //


        System.out.println("Establishing connection");
        session.connect(10);

        Channel channel = session.openChannel("exec");
        ((ChannelExec)channel).setCommand(command);
        channel.setInputStream(null);
        channel.connect(10000);

//            name = session.getUserName();
//            System.out.println(session.getHost());

    }
    catch(Exception e){
        System.err.print(e);
        System.out.print(e);
    }        

}

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