Java Ganymed ssh 隧道...如何检查隧道是否仍然打开？
我有一个使用 Ganymed 的 LocalPortForwarder 类创建的 ssh 隧道。运行良好。问题是如何（以 Java 编程方式）检查隧道是否仍然打开且处于活动状态？
作为参考，这里是创建隧道的代码片段（为简洁起见，删除了错误检查）：
Connection conn = new Connection(remoteHostName);
conn.connect();
boolean isAuthenticated = conn.authenticateWithPassword(username, password);
LocalPortForwarder lpf1
= conn.createLocalPortForwarder(newPort,
remoteHostName,
Integer.parseInt(remoteHostPort));
I have an ssh tunnel created with Ganymed's LocalPortForwarder class. It's working fine. The question is how (programmatically in Java) do I check that the tunnel is still open and active?
For reference, here's the code snippet that creates the tunnel (error checking removed for brevity's sake):
Connection conn = new Connection(remoteHostName);
conn.connect();
boolean isAuthenticated = conn.authenticateWithPassword(username, password);
LocalPortForwarder lpf1
= conn.createLocalPortForwarder(newPort,
remoteHostName,
Integer.parseInt(remoteHostPort));
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检测任何 TCP 连接状态的唯一方法是尝试使用它。它不像 SNA 过去那样有“心跳”。
The only way to detect the state of any TCP connection is to try to use it. It doesn't have a 'heartbeat' like SNA used to.