SM64O/NetworkHelper.cs

   1 using System;
   2 using System.Net;
   3 using System.Runtime.CompilerServices;
   4 using System.Threading;
   5 using System.Threading.Tasks;
   6
   7 namespace SM64O
   8 {
   9     public static class NetworkHelper
  10     {
  11         public static string ExternalIp;
  12         public static int ConfirmedOpenPort;
  13
  14         private const string ServiceAddress = "napi.sm64o.com";
  15         private const int ServicePort = 6460;
  16
  17         private static EndPoint Service = null;
  18
  19         private static bool _success; // this is dirty
  20
  21         private static bool _errOnce = false; // only show err message once
  22
  23         public static async Task<bool> RequestAssistance(int port)
  24         {
  25             /* if (ConfirmedOpenPort == port)
  26                 return true;
  27
  28             if (Service == null)
  29             {
  30                 IPAddress address = Program.ResolveAddress(ServiceAddress);
  31
  32                 // If api.sm64o.com closed
  33                 if (address == null)
  34                     return true;
  35                 Service = new IPEndPoint(address, ServicePort);
  36             }
  37
  38             var server = ((UdpConnectionListener) new ConnectionListener());
  39
  40             if (server == null) return false;
  41
  42             _success = false;
  43             ConfirmedOpenPort = 0;
  44             ExternalIp = null;
  45
  46             server.UnconnectedDataReceived += DataReceived;
  47
  48             int tries = 1;
  49             byte[] packet = BuildStartPacket((short) port);
  50
  51             do
  52             {
  53                 await Task.Run(() => server.SendUnconnectedBytes(packet, Service));
  54
  55                 await Task.Delay(1000 * tries);
  56                 tries++;
  57             } while (tries < 4 && !_success);
  58
  59             server.UnconnectedDataReceived -= DataReceived;
  60
  61             if (_success)
  62                 ConfirmedOpenPort = port;
  63 */
  64             return _success;
  65         }
  66
  67         private static void DataReceived(object sender/*, UnconnectedDataReceivedEventArgs e*/)
  68         {
  69             /*
  70             // We only want data from the source
  71             if (e.Sender.GetHashCode() != Service.GetHashCode())
  72                 return;
  73
  74             // check response data
  75             var response = System.Text.Encoding.ASCII.GetString(e.Data);
  76
  77             if (response.StartsWith("BADVER"))
  78             {
  79                 if (!_errOnce)
  80                     System.Windows.Forms.MessageBox.Show("Failed to communicate with Net64 open port checker - your application is out-of-date.", "Out Of Date", System.Windows.Forms.MessageBoxButtons.OK, System.Windows.Forms.MessageBoxIcon.Warning);
  81                 _errOnce = true;
  82                 return;
  83             }
  84
  85             if (response.StartsWith("OK "))
  86             {
  87                 // read our IP
  88                 var wbf = response.Substring(3);
  89                 IPAddress add = IPAddress.Parse(wbf);
  90                 ExternalIp = add.ToString();
  91                 /*
  92
  93                 // Don't need to send back ACK
  94
  95                 byte[] ack = new byte[4];
  96
  97                 ack[0] = 0x41;
  98                 ack[0] = 0x43;
  99                 ack[0] = 0x4b;
 100                 ack[0] = 0x00;
 101
 102                 ((UdpConnectionListener)Form1.listener).SendUnconnectedBytes(ack, Service);
 103                 */
 104                // _success = true;
 105             //}
 106         }
 107
 108         private static byte[] BuildStartPacket(short port)
 109         {
 110             byte[] buffer = new byte[400];
 111
 112             buffer[0] = 0x6e; // 'n'
 113             buffer[1] = 0x65; // 'e'
 114             buffer[2] = 0x74; // 't'
 115             buffer[3] = 0x36; // '6'
 116             buffer[4] = 0x34; // '4'
 117             buffer[5] = 0x69; // 'i'
 118             buffer[6] = 0x70; // 'p'
 119             buffer[7] = 0x63; // 'c'
 120             buffer[8] = 0x30; // '0'
 121             buffer[9] = 0x30; // '0'
 122             buffer[10] = 0x30; // '0'
 123             buffer[11] = 0x30; // '0'
 124
 125             Array.Copy(BitConverter.GetBytes(port), 0, buffer, 12, 2);
 126
 127             return buffer;
 128         }
 129     }
 130 }