/// <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."); }