我需要找到一种方法来自动化ssh命令到我的路由器。我的目标是每当我从Java程序运行脚本时重启路由器。我有一些问题。
首先,这是我从路由器的ssh获得的输出序列: 首先我做:
ssh root@192.168.100.1
返回:
root@192.168.100.1's password:
我输入密码“admin”。然后转到此提示:
Welcome Visiting Huawei Home Gateway
Copyright by Huawei Technologies Co., Ltd.
Password is default value, please modify it!
WAP>
现在,我输入“reset”并重新启动路由器。
我已经尝试了Tcl和Expect,虽然我可以在Windows上使用它,但它在Linux上不起作用。这是我的Tcl脚本代码:
#!/bin/sh
# \ exec tclsh "$0" ${1+"$@"}
package require Expect
spawn ssh root@192.168.100.1
send "admin\r"
send "reset\r"
after 3000
exit
每当我尝试执行它时,Tcl8.6都会通过它运行并在没有实际执行任何操作的情况下终止。但是,如果我在运行Tcl8.6时手动输入所有这些命令,它可以正常工作
我也尝试过JSch Java库。有了这个,我可以让Java程序连接并输出路由器的shell,但是我尝试发送的任何命令都没有。这是以下代码:
...
JSch jsch = new JSch();
Session session = jsch.getSession("root", "192.168.100.1", 22);
Properties config = new Properties();
config.put("StrictHostKeyChecking", "no");
session.setConfig(config);
// Skip prompting for the password info and go direct...
session.setPassword("admin");
session.connect();
String command = "reset\r";
Channel channel = session.openChannel("exec");
((ChannelExec) channel).setCommand(command);
((ChannelExec) channel).setErrStream(System.err);
InputStream in = channel.getInputStream();
System.out.println("Connect to session...");
channel.connect();
byte[] tmp = new byte[1024];
while (true) {
while (in.available() > 0) {
int i = in.read(tmp, 0, 1024);
if (i < 0) {
break;
}
System.out.print(new String(tmp, 0, i));
}
if (channel.isClosed()) {
System.out.println("exit-status: " + channel.getExitStatus());
break;
}
try {
Thread.sleep(1000);
} catch (Exception ee) {
}
}
channel.disconnect();
session.disconnect();
System.out.println("disconnected");
这是我得到的输出:
Connect to session...
Welcome Visiting Huawei Home Gateway
Copyright by Huawei Technologies Co., Ltd.
Password is default value, please modify it!
WAP>
直到我退出才停留在这里。路由器不会重启。我也试过了:
String command = "reset";
但它做同样的事情。有谁知道我能做到这一点吗?
答案 0 :(得分:4)
尝试使用 shell 代替 exec 与设备进行交互。
以下是我过去常用的快速代码,您可以根据自己的需要进行调整:
private static final String PROMPT = ">";
public static void main(String[] args) throws Exception {
Session session = null;
ChannelShell channel = null;
try {
JSch jsch = new JSch();
session = jsch.getSession("root", "192.168.100.1", 22);
session.setConfig("StrictHostKeyChecking", "no");
session.setPassword("admin");
session.connect();
channel = (ChannelShell) session.openChannel("shell");
PipedOutputStream reply = new PipedOutputStream();
PipedInputStream input = new PipedInputStream(reply);
ByteArrayOutputStream output = new ByteArrayOutputStream();
channel.setInputStream(input, true);
channel.setOutputStream(output, true);
channel.connect();
getPrompt(channel, output);
writeCommand(reply, "reset");
getPrompt(channel, output);
} finally {
if (channel != null) {
channel.disconnect();
}
if (session != null) {
session.disconnect();
}
}
}
private static void writeCommand(PipedOutputStream reply, String command) throws IOException {
System.out.println("Command: " + command);
reply.write(command.getBytes());
reply.write("\n".getBytes());
}
private static void getPrompt(ChannelShell channel, ByteArrayOutputStream output)
throws UnsupportedEncodingException, InterruptedException {
while (!channel.isClosed()) {
String response = new String(output.toByteArray(), "UTF-8");
System.out.println(response);
if (response.trim().endsWith(PROMPT)) {
output.reset();
return;
}
Thread.sleep(100);
}
}
更新:我注意到您通过SSH发送的命令以\r
结尾。请尝试\n
,看看它是否适合您。