/// <summary>
/// https://www.example-code.com/dotnet-core/dnsLookup.asp
/// </summary>
/// <param name="target"></param>
/// <returns></returns>
public async Task <NetworkDnsQueryLookup> DnsChilkatLookup(string target)
{
Chilkat.Socket socket = new Chilkat.Socket();
socket.UnlockComponent("unlock_code");
int milliseconds = 10000;
var address = await Task.Run(() => { return(socket.DnsLookup(target, milliseconds)); });
var networkDnsQueryLookup = new NetworkDnsQueryLookup
{
IpAddress = address,
};
Debug.Assert(!string.IsNullOrEmpty(networkDnsQueryLookup.IpAddress), "IP Address empty? Why?");
if (!socket.LastMethodSuccess)
{
Debug.WriteLine(socket.LastErrorText);
return(default);
public static void tunnel(int serverPort)
{
Chilkat.Socket tunnel = new Chilkat.Socket();
bool success;
// Anything unlocks the component and begins a fully-functional 30-day trial.
success = tunnel.UnlockComponent("Anything for 30-day trial");
if (success != true)
{
Console.WriteLine(tunnel.LastErrorText);
return;
}
string sshHostname = "172.24.19.18";
int sshPort = 22;
// Connect to an SSH server and establish the SSH tunnel:
success = tunnel.SshOpenTunnel(sshHostname, sshPort);
if (success != true)
{
Console.WriteLine(tunnel.LastErrorText);
return;
}
// Authenticate with the SSH server via a login/password
// or with a public key.
// This example demonstrates SSH password authentication.
success = tunnel.SshAuthenticatePw("rishabh", "root123");
if (success != true)
{
Console.WriteLine(tunnel.LastErrorText);
return;
}
// OK, the SSH tunnel is setup. Now open a channel within the tunnel.
// Once the channel is obtained, the Socket API may
// be used exactly the same as usual, except all communications
// are sent through the channel in the SSH tunnel.
// Any number of channels may be created from the same SSH tunnel.
// Multiple channels may coexist at the same time.
// Connect to an NIST time server and read the current date/time
Chilkat.Socket channel = null;
int maxWaitMs = 4000;
bool useTls = false;
channel = tunnel.SshOpenChannel("time-c-g.nist.gov", 37, useTls, maxWaitMs);
if (channel == null)
{
Console.WriteLine(tunnel.LastErrorText);
return;
}
// The time server will send a big-endian 32-bit integer representing
// the number of seconds since since 00:00 (midnight) 1 January 1900 GMT.
// The ReceiveInt32 method will receive a 4-byte integer, but returns
// true or false to indicate success. If successful, the integer
// is obtained via the ReceivedInt property.
bool bigEndian = true;
success = channel.ReceiveInt32(bigEndian);
if (success != true)
{
Console.WriteLine(channel.LastErrorText);
return;
}
Chilkat.CkDateTime dt = new Chilkat.CkDateTime();
dt.SetFromNtpTime(channel.ReceivedInt);
// Show the current local date/time
bool bLocalTime = true;
Console.WriteLine("Current local date/time: " + dt.GetAsRfc822(bLocalTime));
bool isSent = channel.SendString("echo hello world");
if (isSent != true)
{
Console.WriteLine(channel.LastErrorText);
return;
}
Console.WriteLine("---- echo hello world ----");
// Close the SSH channel.
success = channel.Close(maxWaitMs);
if (success != true)
{
Console.WriteLine(channel.LastErrorText);
return;
}
// It is possible to create a new channel from the existing SSH tunnel for the next connection:
// Any number of channels may be created from the same SSH tunnel.
// Multiple channels may coexist at the same time.
channel = tunnel.SshOpenChannel("time-a.nist.gov", 37, useTls, maxWaitMs);
if (channel == null)
{
Console.WriteLine(tunnel.LastErrorText);
return;
}
// Review the LastErrorText to see that the connection was made via the SSH tunnel:
Console.WriteLine(tunnel.LastErrorText);
// Close the connection to time-a.nist.gov. This is actually closing our channel
// within the SSH tunnel, but keeps the tunnel open for the next port-forwarded connection.
success = channel.Close(maxWaitMs);
if (success != true)
{
Console.WriteLine(channel.LastErrorText);
return;
}
// Finally, close the SSH tunnel.
success = tunnel.SshCloseTunnel();
if (success != true)
{
Console.WriteLine(tunnel.LastErrorText);
return;
}
Console.WriteLine("TCP SSH tunneling example completed.");
}
