91 lines
2.5 KiB
C#
91 lines
2.5 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Net.Sockets;
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using System.Net;
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using System.Text;
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using System.Threading.Tasks;
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using System.Windows;
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using System.Windows.Controls;
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using System.Windows.Data;
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using System.Windows.Documents;
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using System.Windows.Input;
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using System.Windows.Media;
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using System.Windows.Media.Imaging;
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using System.Windows.Shapes;
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namespace BuechermarktClient
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{
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/// <summary>
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/// Interaktionslogik für GetConnection.xaml
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/// </summary>
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public partial class GetConnection : Window
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{
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public const string ServerIdentifier = "BUECHERMARKTCLIENT00018946";
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public GetConnection()
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{
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InitializeComponent();
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Loaded += (sender, e) =>
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{
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ListenForServer();
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};
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}
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private UdpClient UdpClient;
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public void ListenForServer()
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{
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UdpClient = new UdpClient(3000);
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UdpClient.BeginReceive(Recevie, new object());
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}
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public void Recevie(IAsyncResult ar)
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{
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var ip = new IPEndPoint(IPAddress.Any, 15000);
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var bytes = UdpClient.EndReceive(ar, ref ip);
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string message = Encoding.ASCII.GetString(bytes);
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if(message == ServerIdentifier)
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{
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var cip = ip.Address.ToString();
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if (IsLocalIpAddress(cip)) cip = "127.0.0.1";
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MainWindow.MongoHost = cip;
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Dispatcher.BeginInvoke(new Action(delegate () {
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Close();
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}));
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//Success
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} else
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{
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//Retry
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ListenForServer();
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}
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}
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private static bool IsLocalIpAddress(string host)
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{
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try
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{ // get host IP addresses
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IPAddress[] hostIPs = Dns.GetHostAddresses(host);
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// get local IP addresses
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IPAddress[] localIPs = Dns.GetHostAddresses(Dns.GetHostName());
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// test if any host IP equals to any local IP or to localhost
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foreach (IPAddress hostIP in hostIPs)
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{
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// is localhost
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if (IPAddress.IsLoopback(hostIP)) return true;
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// is local address
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foreach (IPAddress localIP in localIPs)
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{
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if (hostIP.Equals(localIP)) return true;
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}
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}
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}
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catch { }
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return false;
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}
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}
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}
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