Rust

SSH Tunnel Listener Activity Log

Demonstrates the listener-log properties KeepAcceptLog, AcceptLog, and AcceptLogPath, which record the activity of the background listener thread started by BeginAccepting.

Note: The log paths are relative to the application's current working directory. Absolute paths may also be used.

Background: Because the listener runs on a background thread, an activity log is often the only practical way to see what it is doing — which connections it accepted and when. KeepAcceptLog must be enabled for the in-memory AcceptLog to be populated; AcceptLogPath is an independent file-based log that persists across the run. This log covers the listener specifically, as distinct from the TunnelLog that records the SSH tunnel threads.

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Rust


// Demonstrates the SshTunnel listener-log properties KeepAcceptLog, AcceptLog, and AcceptLogPath.
// 
// These log the activity of the background listener thread started by BeginAccepting.

let tunnel = chilkat::SshTunnel::new();

// Retain the listener activity log in memory so it can be read from the AcceptLog property.
tunnel.set_keep_accept_log(true);

// Optionally also write the listener activity to a file (separate from the in-memory log).
tunnel.set_accept_log_path("qa_output/accept.log");

tunnel.set_dest_hostname("db.internal.example.com");
tunnel.set_dest_port(5432);

let ssh_port = 22;
if tunnel.connect("ssh.example.com", ssh_port).is_err() {
    println!("{}", tunnel.last_error_text());
    return;
}

// Normally you would not hard-code the password in source.  You should instead obtain it
// from an interactive prompt, environment variable, or a secrets vault.
let password = "mySshPassword".to_string();

if tunnel.authenticate_pw("mySshLogin", &password).is_err() {
    println!("{}", tunnel.last_error_text());
    return;
}

let listen_port = 1080;
if tunnel.begin_accepting(listen_port).is_err() {
    println!("{}", tunnel.last_error_text());
    return;
}

// ... the listener accepts connections for a while ...

// Read the accumulated in-memory listener log.
println!("{}", tunnel.accept_log());

let wait_for_thread_exit = true;
if tunnel.close_tunnel(wait_for_thread_exit).is_err() {
    println!("{}", tunnel.last_error_text());
    return;
}