added CDiscover: searching the network for running vocaluxe server, could be useful for users who do not know what a ip address is.

ClientServerLib/AndroidRemote/AndroidRemote.csproj

@@ -76,6 +76,9 @@
     <Compile Include="..\ClientServerLib\Vocaluxe\VocaluxeStructs.cs">
       <Link>ClientServerLib\Vocaluxe\VocaluxeStructs.cs</Link>
     </Compile>
+    <Compile Include="..\ClientServerLib\CDiscover.cs">
+      <Link>ClientServerLib\CDiscover.cs</Link>
+    </Compile>
   </ItemGroup>
   <ItemGroup>
     <None Include="Resources\AboutResources.txt" />

ClientServerLib/ClientServerLib/CDiscover.cs

@@ -0,0 +1,120 @@
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Linq;
+using System.Net;
+using System.Net.Sockets;
+using System.Text;
+using System.Threading;
+using System.Timers;
+
+namespace ClientServerLib
+{
+    public delegate void OnServerDiscovered(string IPAddress, string Hostname);
+
+    public class CDiscover
+    {
+        private string _Keyword;
+        private string _BroadcastAddress;
+        private int _Port;
+
+        private Thread _DiscoverThread;
+        private bool _DiscoverRunning;
+        private OnServerDiscovered _OnDiscovered;
+
+
+        private System.Timers.Timer _BroadcastTimer;
+
+        public CDiscover(int Port, string Keyword, string BroadcastAddress = "255.255.255.255")
+        {
+            _BroadcastAddress = BroadcastAddress;
+            _Port = Port;
+            _Keyword = Keyword;
+
+            _DiscoverRunning = false;
+            _BroadcastTimer = new System.Timers.Timer();
+            _BroadcastTimer.Elapsed += new ElapsedEventHandler(OnBroadcastEvent);
+            _BroadcastTimer.Interval = 2500;
+        }
+
+        public void StartBroadcasting()
+        {
+            _BroadcastTimer.Start();
+        }
+
+        public void Stop()
+        {
+            _BroadcastTimer.Stop();
+            _DiscoverRunning = false;          
+        }
+
+        public void Discover(OnServerDiscovered OnDiscovered, int Timeout = 5000)
+        {
+            if (_DiscoverRunning)
+                return;
+
+            _DiscoverRunning = true;
+            _DiscoverThread = new Thread(() => _Discover(Timeout));
+            _OnDiscovered = OnDiscovered;
+            _DiscoverThread.Start();
+        }
+
+        private void OnBroadcastEvent(object source, ElapsedEventArgs e)
+        {
+            Socket s = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
+            s.EnableBroadcast = true;
+            IPAddress broadcast = IPAddress.Parse(_BroadcastAddress);
+            byte[] sendbuf = Encoding.UTF8.GetBytes(_Keyword);
+            IPEndPoint ep = new IPEndPoint(broadcast, _Port);
+
+            s.SendTo(sendbuf, ep);
+            s.Close();
+        }
+
+        private void _Discover(int Timeout)
+        {
+            UdpClient listener = null;
+            Stopwatch timer = new Stopwatch();
+
+            List<string> knownServer = new List<string>();
+            bool foundSomething = false;
+            timer.Start();
+            while (_DiscoverRunning && timer.ElapsedMilliseconds < Timeout * 2)
+            {
+                try
+                {
+                    listener = new UdpClient(_Port);
+                    IPEndPoint groupEP = new IPEndPoint(IPAddress.Any, _Port);
+                    listener.Client.ReceiveTimeout = Timeout;
+
+                    byte[] bytes = listener.Receive(ref groupEP);
+                    string message = Encoding.UTF8.GetString(bytes, 0, bytes.Length);
+
+                    foundSomething = true;
+                    if (!knownServer.Contains(groupEP.Address.ToString()))
+                    {
+                        knownServer.Add(groupEP.Address.ToString());
+                        if (_OnDiscovered != null)
+                        {
+                            IPHostEntry e = Dns.GetHostEntry(groupEP.Address);
+                            string hostname = e.HostName;
+
+                            _OnDiscovered(groupEP.Address.ToString(), hostname);
+                        }
+                    }
+
+                    listener.Close();
+                }
+                catch (Exception)
+                {
+                    if (listener != null)
+                        listener.Close();
+                }
+            }
+            _DiscoverRunning = false;
+
+            if (!foundSomething)
+                _OnDiscovered("Timeout", "unknown");
+        }
+    }
+}

ClientServerLib/ClientServerLib/ClientServerLib.csproj

@@ -46,6 +46,7 @@
   <ItemGroup>
     <Compile Include="CClient.cs" />
     <Compile Include="CConnection.cs" />
+    <Compile Include="CDiscover.cs" />
     <Compile Include="CServer.cs" />
     <Compile Include="DeffieHellman\BigInt.cs" />
     <Compile Include="DeffieHellman\DeffieHellman.cs" />

ClientServerLib/ClientServerLib/Vocaluxe/CCommands.cs

@@ -14,6 +14,8 @@ namespace Vocaluxe.Base.Server
         private static UTF8Encoding encoder = new UTF8Encoding();
         public static SHA256Managed SHA256 = new SHA256Managed();
 
+        public const string BroadcastKeyword = "I am a Vocaluxe Server";
+
         #region Commands
         public const int ResponseOK = 1;
         public const int ResponseNOK = 2;

ClientServerLib/ClientTest/ClientTest.Designer.cs

@@ -49,6 +49,9 @@
             this.btDown = new System.Windows.Forms.Button();
             this.btSendAvatar = new System.Windows.Forms.Button();
             this.btSendProfile = new System.Windows.Forms.Button();
+            this.btDiscover = new System.Windows.Forms.Button();
+            this.tbDiscoveredServer = new System.Windows.Forms.TextBox();
+            this.label1 = new System.Windows.Forms.Label();
             this.statusStrip1.SuspendLayout();
             this.SuspendLayout();
             // 
@@ -251,11 +254,44 @@
             this.btSendProfile.UseVisualStyleBackColor = true;
             this.btSendProfile.Click += new System.EventHandler(this.btSendProfile_Click);
             // 
+            // btDiscover
+            // 
+            this.btDiscover.Location = new System.Drawing.Point(831, 502);
+            this.btDiscover.Name = "btDiscover";
+            this.btDiscover.Size = new System.Drawing.Size(165, 23);
+            this.btDiscover.TabIndex = 16;
+            this.btDiscover.Text = "Discover";
+            this.btDiscover.UseVisualStyleBackColor = true;
+            this.btDiscover.Click += new System.EventHandler(this.btDiscover_Click);
+            // 
+            // tbDiscoveredServer
+            // 
+            this.tbDiscoveredServer.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Left) 
+            | System.Windows.Forms.AnchorStyles.Right)));
+            this.tbDiscoveredServer.Location = new System.Drawing.Point(15, 405);
+            this.tbDiscoveredServer.Multiline = true;
+            this.tbDiscoveredServer.Name = "tbDiscoveredServer";
+            this.tbDiscoveredServer.Size = new System.Drawing.Size(810, 120);
+            this.tbDiscoveredServer.TabIndex = 17;
+            this.tbDiscoveredServer.WordWrap = false;
+            // 
+            // label1
+            // 
+            this.label1.AutoSize = true;
+            this.label1.Location = new System.Drawing.Point(12, 389);
+            this.label1.Name = "label1";
+            this.label1.Size = new System.Drawing.Size(41, 13);
+            this.label1.TabIndex = 18;
+            this.label1.Text = "Server:";
+            // 
             // ClientTest
             // 
             this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
             this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
             this.ClientSize = new System.Drawing.Size(1008, 550);
+            this.Controls.Add(this.label1);
+            this.Controls.Add(this.tbDiscoveredServer);
+            this.Controls.Add(this.btDiscover);
             this.Controls.Add(this.btSendProfile);
             this.Controls.Add(this.btSendAvatar);
             this.Controls.Add(this.btDown);
@@ -307,6 +343,9 @@
         private System.Windows.Forms.Button btDown;
         private System.Windows.Forms.Button btSendAvatar;
         private System.Windows.Forms.Button btSendProfile;
+        private System.Windows.Forms.Button btDiscover;
+        private System.Windows.Forms.TextBox tbDiscoveredServer;
+        private System.Windows.Forms.Label label1;
     }
 }
 

ClientServerLib/ClientTest/ClientTest.cs

@@ -19,12 +19,15 @@ namespace ClientTest
     public partial class ClientTest : Form
     {
         CClient client;
+        CDiscover discover;
+
         private bool loggedIn;
 
         public ClientTest()
         {
             client = new CClient();
             loggedIn = false;
+            discover = new CDiscover(3000, CCommands.BroadcastKeyword);
 
             InitializeComponent();
         }
@@ -32,6 +35,7 @@ namespace ClientTest
         protected override void OnClosing(CancelEventArgs e)
         {
             client.Close();
+            discover.Stop();
             base.OnClosing(e);
         }
 
@@ -262,5 +266,22 @@ namespace ClientTest
                 client.SendMessage(CCommands.CreateCommandSendProfile(data, "TestUser", 0), OnResponse);
             }
         }
+
+        private void btDiscover_Click(object sender, EventArgs e)
+        {
+            tbDiscoveredServer.Text = "Searching for Vocaluxe Server:\r\n";
+            discover.Discover(_OnDiscovered);
+        }
+
+        private void _OnDiscovered(string Address, string HostName)
+        {
+            this.Invoke((MethodInvoker)delegate
+            {
+                if (Address != "Timeout")
+                    tbDiscoveredServer.Text += "IP = " + Address + "; HostName = " + HostName + "\r\n";
+                else
+                    tbDiscoveredServer.Text += "Timeout" + "\r\n";
+            });
+        }
     }
 }