Rust

TCP or TLS over Multiple Hop SSH to Remote Server

See more Socket/SSL/TLS Examples

Demonstrates how to use the Chilkat Socket API to connect to a remote server (using TCP or TLS) tunneled through mulitple-hop SSH. The scheme looks like this:

Application => ServerSSH1 => ServerSSH2 => DestinationServer

The ConnectThroughSsh and UseSsh methods are added in Chilkat version 9.5.0.55 to accomplish this task.

Rust

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

let ssh1 = chilkat::Ssh::new();

// Connect directly to the 1st SSH server.
if ssh1.connect("serverssh1.com", 22).is_err() {
    println!("{}", ssh1.last_error_text());
    return;
}

// Authenticate using login/password:
if ssh1.authenticate_pw("ssh1Login", "ssh1Password").is_err() {
    println!("{}", ssh1.last_error_text());
    return;
}

// Connect through the 1st SSH connection to reach a 2nd SSH server.
// Note: Any number of SSH connections may be simultaneously tunneled through a single
// existing SSH connection.
let ssh2 = chilkat::Ssh::new();
if ssh2.connect_through_ssh(&ssh1, "serverssh2.com", 22).is_err() {
    println!("{}", ssh2.last_error_text());
    return;
}

// Authenticate with ssh2...
if ssh2.authenticate_pw("ssh2Login", "ssh2Password").is_err() {
    println!("{}", ssh2.last_error_text());
    return;
}

let socket = chilkat::Socket::new();

// Tell the socket object to connect to our destination server though the ssh2 tunnel (which itself is routed through ssh1).
// The connection looks like this:  ApplicationSocket(TLS) => ServerSSH1 => ServerSSH2 => DestinationServer
if socket.use_ssh(&ssh2).is_err() {
    println!("{}", socket.last_error_text());
    return;
}

// Connect using TLS to www.chilkatsoft.com
// We could also tunnel a bare TCP connection by specifying port 80 with useTls = false.
let use_tls = true;
let max_wait_millisec = 20000;
if socket.connect("www.chilkatsoft.com", 443, use_tls, max_wait_millisec).is_err() {
    println!("{}", socket.last_error_text());
    return;
}

// Once the multiple hop SSH tunneled connection is setup,  the socket programming
// is identical to the normal case where we have a direct connection.

// Tell the socket object that all text is to be sent in the utf-8 encoding,
// and the text received is assumed to be utf-8.
socket.set_string_charset("utf-8");

// Send an HTTP HEAD request:
if socket.send_string("HEAD / HTTP/1.1\r\nHost: www.chilkatsoft.com\r\n\r\n").is_err() {
    println!("{}", socket.last_error_text());
    return;
}

// Wait a maximum of 4 seconds while no data is forthcoming:
socket.set_max_read_idle_ms(4000);

// Get the 1st response line, which should be "HTTP/1.1 200 OK"
let Ok(response_status_line) = socket.receive_to_crlf() else {
    println!("{}", socket.last_error_text());
    return;
};

println!("StatusLine: {}", response_status_line);

// Now get the 1st line of the response header:
let Ok(response_header_line) = socket.receive_to_crlf() else {
    println!("{}", socket.last_error_text());
    return;
};

println!("HeaderLine: {}", response_header_line);

// Now read the remainder of the response header by reading until a double CRLF is seen:
let Ok(remainder_of_header) = socket.receive_until_match("\r\n\r\n") else {
    println!("{}", socket.last_error_text());
    return;
};

println!("Remainder: {}", remainder_of_header);

// Close the connection with the server.  This closes the tunnel through ssh2.
// Wait a max of 20 seconds (20000 millsec)
let _ = socket.close(20000).is_ok();

// Close the connection with ssh2.  (This closes the the tunnel through ssh1.)
// The connection with ssh1 is still alive, and may be used for more connections.
ssh2.disconnect();

ssh1.disconnect();