Clients/SimpleChat.NET/SimpleChat.cs - third_party/mdnsresponder - Git at Google

 /* -*- Mode: C; tab-width: 4 -*-
  *
  * Copyright (c) 1997-2004 Apple Computer, Inc. All rights reserved.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *     http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 using System;
 using System.Drawing;
 using System.Collections;
 using System.ComponentModel;
 using System.Windows.Forms;
 using System.Net;
 using System.Net.Sockets;
 using System.Data;
 using System.Text;
 using Bonjour;

 namespace SimpleChat.NET
 {
 	/// <summary>
 	/// Summary description for Form1.
 	/// </summary>
 	///

 	public class SimpleChat : System.Windows.Forms.Form
 	{
 		private System.Windows.Forms.ComboBox   comboBox1;
 		private System.Windows.Forms.TextBox    textBox2;
 		private System.Windows.Forms.Button     button1;
 		private System.Windows.Forms.Label      label1;

         private Bonjour.DNSSDEventManager       m_eventManager = null;

         private Bonjour.DNSSDService            m_service = null;

         private Bonjour.DNSSDService            m_registrar = null;

         private Bonjour.DNSSDService            m_browser = null;

         private Bonjour.DNSSDService            m_resolver = null;
 		private String					        m_name;

         private Socket                          m_socket = null;

         private const int                       BUFFER_SIZE = 1024;

         public byte[]                           m_buffer = new byte[BUFFER_SIZE];

         public bool                             m_complete = false;

         public StringBuilder                    m_sb = new StringBuilder();

         delegate void                           ReadMessageCallback(String data);

         ReadMessageCallback                     m_readMessageCallback;
 		/// <summary>
 		/// Required designer variable.
 		/// </summary>
 		private System.ComponentModel.Container components = null;
 		private System.Windows.Forms.RichTextBox richTextBox1;

 		// ServiceRegistered
 		//
 		// Called by DNSServices core as a result of Register()
 		// call
 		//


         public void

         ServiceRegistered

                     (

                     DNSSDService service,

                     DNSSDFlags flags,

                     String name,

                     String regType,

                     String domain

                     )

         {

             m_name = name;


             try

             {

                 m_browser = m_service.Browse(0, 0, "_p2pchat._udp", null, m_eventManager);

             }

             catch

             {

                 MessageBox.Show("Browse Failed", "Error");

                 Application.Exit();

             }

         }

 		//
 		// ServiceFound
 		//
 		// Called by DNSServices core as a result of a Browse call
 		//

 		public void
         ServiceFound
 				    (
 				    DNSSDService    sref,
 				    DNSSDFlags  	flags,
 				    uint			ifIndex,
                     String          serviceName,
                     String          regType,
                     String          domain
 				    )
 		{

             if (serviceName != m_name)

             {

                 PeerData peer = new PeerData();


                 peer.InterfaceIndex = ifIndex;

                 peer.Name = serviceName;

                 peer.Type = regType;

                 peer.Domain = domain;

                 peer.Address = null;


                 comboBox1.Items.Add(peer);


                 if (comboBox1.Items.Count == 1)

                 {

                     comboBox1.SelectedIndex = 0;

                 }

             }
 		}


         //

         // ServiceLost

         //

         // Called by DNSServices core as a result of a Browse call

         //


         public void

         ServiceLost

                     (

                     DNSSDService sref,

                     DNSSDFlags flags,

                     uint ifIndex,

                     String serviceName,

                     String regType,

                     String domain

                     )

         {

             PeerData peer = new PeerData();


             peer.InterfaceIndex = ifIndex;

             peer.Name = serviceName;

             peer.Type = regType;

             peer.Domain = domain;

             peer.Address = null;


             comboBox1.Items.Remove(peer);

         }

 		//
 		// ServiceResolved
 		//
 		// Called by DNSServices core as a result of DNSService.Resolve()
 		// call
 		//


         public void

         ServiceResolved

                     (

                     DNSSDService sref,

                     DNSSDFlags flags,

                     uint ifIndex,

                     String fullName,

                     String hostName,

                     ushort port,

                     TXTRecord txtRecord

                     )
 		{

             m_resolver.Stop();

             m_resolver = null;


             PeerData peer = (PeerData)comboBox1.SelectedItem;


             peer.Port = port;


             try

             {

                 m_resolver = m_service.QueryRecord(0, ifIndex, hostName, DNSSDRRType.kDNSSDType_A, DNSSDRRClass.kDNSSDClass_IN, m_eventManager );

             }

             catch

             {

                 MessageBox.Show("QueryRecord Failed", "Error");

                 Application.Exit();

             }
 		}

 		//
 		// QueryAnswered
 		//
 		// Called by DNSServices core as a result of DNSService.QueryRecord()
 		// call
 		//

 		public void
 		QueryAnswered
 			(
             DNSSDService    service,
             DNSSDFlags      flags,
             uint            ifIndex,
             String          fullName,
             DNSSDRRType     rrtype,
             DNSSDRRClass    rrclass,
             Object          rdata,
             uint            ttl
             )
         {

             m_resolver.Stop();

             m_resolver = null;


             PeerData peer = (PeerData) comboBox1.SelectedItem;


 			uint bits = BitConverter.ToUInt32( (Byte[])rdata, 0);
 			System.Net.IPAddress address = new System.Net.IPAddress(bits);

             peer.Address = address;
 		}


         public void

         OperationFailed

                     (

                     DNSSDService service,

                     DNSSDError error

                     )

         {

             MessageBox.Show("Operation returned an error code " + error, "Error");

         }


         //

         // OnReadMessage

         //

         // Called when there is data to be read on a socket

         //

         // This is called (indirectly) from OnReadSocket()

         //

         private void

         OnReadMessage

                 (

                 String msg

                 )

         {

             int rgb = 0;


             for (int i = 0; i < msg.Length && msg[i] != ':'; i++)

             {

                 rgb = rgb ^ ((int)msg[i] << (i % 3 + 2) * 8);

             }


             Color color = Color.FromArgb(rgb & 0x007F7FFF);

             richTextBox1.SelectionColor = color;

             richTextBox1.AppendText(msg + Environment.NewLine);

         }

 		//
 		// OnReadSocket
 		//
 		// Called by the .NET core when there is data to be read on a socket
 		//
 		// This is called from a worker thread by the .NET core
 		//
 		private void
 		OnReadSocket
 				(
 				IAsyncResult ar
 				)
 		{
 			try
 			{
 				int read = m_socket.EndReceive(ar);

 				if (read > 0)
 				{
 					String msg = Encoding.UTF8.GetString(m_buffer, 0, read);
 					Invoke(m_readMessageCallback, new Object[]{msg});
 				}

 				m_socket.BeginReceive(m_buffer, 0, BUFFER_SIZE, 0, new AsyncCallback(OnReadSocket), this);
 			}
 			catch
 			{
 			}
 		}


 		public SimpleChat()
 		{
 			//
 			// Required for Windows Form Designer support
 			//
 			InitializeComponent();


             try

             {

                 m_service = new DNSSDService();

             }

             catch

             {

                 MessageBox.Show("Bonjour Service is not available", "Error");

                 Application.Exit();

             }


             m_eventManager = new DNSSDEventManager();

             m_eventManager.ServiceRegistered += new _IDNSSDEvents_ServiceRegisteredEventHandler(this.ServiceRegistered);

             m_eventManager.ServiceFound += new _IDNSSDEvents_ServiceFoundEventHandler(this.ServiceFound);

             m_eventManager.ServiceLost += new _IDNSSDEvents_ServiceLostEventHandler(this.ServiceLost);

             m_eventManager.ServiceResolved += new _IDNSSDEvents_ServiceResolvedEventHandler(this.ServiceResolved);

             m_eventManager.QueryRecordAnswered += new _IDNSSDEvents_QueryRecordAnsweredEventHandler(this.QueryAnswered);

             m_eventManager.OperationFailed += new _IDNSSDEvents_OperationFailedEventHandler(this.OperationFailed);

 			m_readMessageCallback = new ReadMessageCallback(OnReadMessage);

 			this.Load += new System.EventHandler(this.Form1_Load);

 			this.AcceptButton = button1;
 		}

 		/// <summary>
 		/// Clean up any resources being used.
 		/// </summary>
 		protected override void
 		Dispose( bool disposing )
 		{
 			if( disposing )
 			{
 				if (components != null)
 				{
 					components.Dispose();
 				}

 				if (m_registrar != null)
 				{
 					m_registrar.Stop();
 				}

 				if (m_browser != null)
 				{
 					m_browser.Stop();
 				}


                 if (m_resolver != null)

                 {

                     m_resolver.Stop();

                 }


                 m_eventManager.ServiceFound -= new _IDNSSDEvents_ServiceFoundEventHandler(this.ServiceFound);

                 m_eventManager.ServiceLost -= new _IDNSSDEvents_ServiceLostEventHandler(this.ServiceLost);

                 m_eventManager.ServiceResolved -= new _IDNSSDEvents_ServiceResolvedEventHandler(this.ServiceResolved);

                 m_eventManager.QueryRecordAnswered -= new _IDNSSDEvents_QueryRecordAnsweredEventHandler(this.QueryAnswered);

                 m_eventManager.OperationFailed -= new _IDNSSDEvents_OperationFailedEventHandler(this.OperationFailed);
 			}
 			base.Dispose( disposing );
 		}

 		#region Windows Form Designer generated code
 		/// <summary>
 		/// Required method for Designer support - do not modify
 		/// the contents of this method with the code editor.
 		/// </summary>
 		private void InitializeComponent()
 		{
 			this.comboBox1 = new System.Windows.Forms.ComboBox();
 			this.textBox2 = new System.Windows.Forms.TextBox();
 			this.button1 = new System.Windows.Forms.Button();
 			this.label1 = new System.Windows.Forms.Label();
 			this.richTextBox1 = new System.Windows.Forms.RichTextBox();
 			this.SuspendLayout();
 			//
 			// comboBox1
 			//
 			this.comboBox1.Anchor = ((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Left)
 				| System.Windows.Forms.AnchorStyles.Right);
 			this.comboBox1.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
 			this.comboBox1.Location = new System.Drawing.Point(59, 208);
 			this.comboBox1.Name = "comboBox1";
 			this.comboBox1.Size = new System.Drawing.Size(224, 21);
 			this.comboBox1.Sorted = true;
 			this.comboBox1.TabIndex = 5;
 			this.comboBox1.SelectedIndexChanged += new System.EventHandler(this.comboBox1_SelectedIndexChanged);
 			//
 			// textBox2
 			//
 			this.textBox2.Anchor = ((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Left)
 				| System.Windows.Forms.AnchorStyles.Right);
 			this.textBox2.Location = new System.Drawing.Point(8, 248);
 			this.textBox2.Name = "textBox2";
 			this.textBox2.ScrollBars = System.Windows.Forms.ScrollBars.Horizontal;
 			this.textBox2.Size = new System.Drawing.Size(192, 20);
 			this.textBox2.TabIndex = 2;
 			this.textBox2.Text = "";
 			this.textBox2.TextChanged += new System.EventHandler(this.textBox2_TextChanged);
 			//
 			// button1
 			//
 			this.button1.Anchor = (System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Right);
 			this.button1.Enabled = false;
 			this.button1.Location = new System.Drawing.Point(208, 248);
 			this.button1.Name = "button1";
 			this.button1.TabIndex = 3;
 			this.button1.Text = "Send";
 			this.button1.Click += new System.EventHandler(this.button1_Click);
 			//
 			// label1
 			//
 			this.label1.Anchor = (System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Left);
 			this.label1.Location = new System.Drawing.Point(8, 210);
 			this.label1.Name = "label1";
 			this.label1.Size = new System.Drawing.Size(48, 16);
 			this.label1.TabIndex = 4;
 			this.label1.Text = "Talk To:";
 			//
 			// richTextBox1
 			//
 			this.richTextBox1.Anchor = (((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom)
 				| System.Windows.Forms.AnchorStyles.Left)
 				| System.Windows.Forms.AnchorStyles.Right);
 			this.richTextBox1.Location = new System.Drawing.Point(8, 8);
 			this.richTextBox1.Name = "richTextBox1";
 			this.richTextBox1.ReadOnly = true;
 			this.richTextBox1.Size = new System.Drawing.Size(272, 184);
 			this.richTextBox1.TabIndex = 1;
 			this.richTextBox1.Text = "";
 			//
 			// Form1
 			//
 			this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
 			this.ClientSize = new System.Drawing.Size(292, 273);
 			this.Controls.AddRange(new System.Windows.Forms.Control[] {
 																		  this.richTextBox1,
 																		  this.label1,
 																		  this.button1,
 																		  this.textBox2,
 																		  this.comboBox1});
 			this.Name = "Form1";
 			this.Text = "SimpleChat.NET";
 			this.ResumeLayout(false);

 		}
 		#endregion

 		private void Form1_Load(object sender, EventArgs e)
 		{
 			IPEndPoint localEP = new IPEndPoint(System.Net.IPAddress.Any, 0);

 			//
 			// create the socket and bind to INADDR_ANY
 			//
 			m_socket	= new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
 			m_socket.Bind(localEP);
 			localEP = (IPEndPoint) m_socket.LocalEndPoint;

 			//
 			// start asynchronous read
 			//
 			m_socket.BeginReceive(m_buffer, 0, BUFFER_SIZE, 0, new AsyncCallback(this.OnReadSocket), this);

 			try
 			{
 				//
 				// start the register and browse operations
 				//
 				m_registrar	=	m_service.Register( 0, 0, System.Environment.UserName, "_p2pchat._udp", null, null, ( ushort ) localEP.Port, null, m_eventManager );
 			}
 			catch
 			{
 				MessageBox.Show("Bonjour service is not available", "Error");
 				Application.Exit();
 			}
 		}

 		/// <summary>
 		/// The main entry point for the application.
 		/// </summary>
 		[STAThread]
 		static void Main()
 		{
 			Application.Run(new SimpleChat());
 		}

 		//
 		// send the message to a peer
 		//
 		private void button1_Click(object sender, System.EventArgs e)
 		{
 			PeerData peer = (PeerData) comboBox1.SelectedItem;

 			String message = m_name + ": " + textBox2.Text;

 			Byte[] bytes = Encoding.UTF8.GetBytes(message);

             IPEndPoint endPoint = new IPEndPoint( peer.Address, peer.Port );


             m_socket.SendTo(bytes, endPoint);

 			richTextBox1.SelectionColor = Color.Black;

 			richTextBox1.AppendText(textBox2.Text + "\n");

 			textBox2.Text = "";
 		}

 		//
 		// called when typing in message box
 		//
 		private void textBox2_TextChanged(object sender, System.EventArgs e)
 		{
 			PeerData peer = (PeerData) comboBox1.SelectedItem;
             button1.Enabled = ((peer.Address != null) && (textBox2.Text.Length > 0));
 		}

 		//
 		// called when peer target changes
 		//
 		/// <summary>
 		/// </summary>
 		/// <param name="sender"></param>
 		/// <param name="e"></param>
 		private void comboBox1_SelectedIndexChanged(object sender, System.EventArgs e)
 		{
 			PeerData peer = (PeerData) comboBox1.SelectedItem;

 			try
 			{
 				m_resolver = m_service.Resolve(0, peer.InterfaceIndex, peer.Name, peer.Type, peer.Domain, m_eventManager);
 			}
 			catch
 			{
 				MessageBox.Show("Unable to Resolve service", "Error");
 				Application.Exit();
 			}
 		}
 	}


     //

     // PeerData

     //

     // Holds onto the information associated with a peer on the network

     //

     public class PeerData

     {

         public uint InterfaceIndex;

         public String Name;

         public String Type;

         public String Domain;

         public IPAddress Address;

         public int Port;


         public override String

         ToString()

         {

             return Name;

         }


         public override bool

         Equals(object other)

         {

             bool result = false;


             if (other != null)

             {

                 if ((object)this == other)

                 {

                     result = true;

                 }

                 else if (other is PeerData)

                 {

                     PeerData otherPeerData = (PeerData)other;


                     result = (this.Name == otherPeerData.Name);

                 }

             }


             return result;

         }


         public override int

         GetHashCode()

         {

             return Name.GetHashCode();

         }

     };
 }
	/* -- Mode: C; tab-width: 4 --
	*
	* Copyright (c) 1997-2004 Apple Computer, Inc. All rights reserved.
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	using System;
	using System.Drawing;
	using System.Collections;
	using System.ComponentModel;
	using System.Windows.Forms;
	using System.Net;
	using System.Net.Sockets;
	using System.Data;
	using System.Text;
	using Bonjour;

	namespace SimpleChat.NET
	{
	/// <summary>
	/// Summary description for Form1.
	/// </summary>
	///

	public class SimpleChat : System.Windows.Forms.Form
	{
	private System.Windows.Forms.ComboBox comboBox1;
	private System.Windows.Forms.TextBox textBox2;
	private System.Windows.Forms.Button button1;
	private System.Windows.Forms.Label label1;

	private Bonjour.DNSSDEventManager m_eventManager = null;

	private Bonjour.DNSSDService m_service = null;

	private Bonjour.DNSSDService m_registrar = null;

	private Bonjour.DNSSDService m_browser = null;

	private Bonjour.DNSSDService m_resolver = null;
	private String m_name;

	private Socket m_socket = null;

	private const int BUFFER_SIZE = 1024;

	public byte[] m_buffer = new byte[BUFFER_SIZE];

	public bool m_complete = false;

	public StringBuilder m_sb = new StringBuilder();

	delegate void ReadMessageCallback(String data);

	ReadMessageCallback m_readMessageCallback;
	/// <summary>
	/// Required designer variable.
	/// </summary>
	private System.ComponentModel.Container components = null;
	private System.Windows.Forms.RichTextBox richTextBox1;

	// ServiceRegistered
	//
	// Called by DNSServices core as a result of Register()
	// call
	//



	public void

	ServiceRegistered

	(

	DNSSDService service,

	DNSSDFlags flags,

	String name,

	String regType,

	String domain

	)

	{

	m_name = name;



	try

	{

	m_browser = m_service.Browse(0, 0, "_p2pchat._udp", null, m_eventManager);

	}

	catch

	{

	MessageBox.Show("Browse Failed", "Error");

	Application.Exit();

	}

	}

	//
	// ServiceFound
	//
	// Called by DNSServices core as a result of a Browse call
	//

	public void
	ServiceFound
	(
	DNSSDService sref,
	DNSSDFlags flags,
	uint ifIndex,
	String serviceName,
	String regType,
	String domain
	)
	{

	if (serviceName != m_name)

	{

	PeerData peer = new PeerData();



	peer.InterfaceIndex = ifIndex;

	peer.Name = serviceName;

	peer.Type = regType;

	peer.Domain = domain;

	peer.Address = null;



	comboBox1.Items.Add(peer);



	if (comboBox1.Items.Count == 1)

	{

	comboBox1.SelectedIndex = 0;

	}

	}
	}



	//

	// ServiceLost

	//

	// Called by DNSServices core as a result of a Browse call

	//



	public void

	ServiceLost

	(

	DNSSDService sref,

	DNSSDFlags flags,

	uint ifIndex,

	String serviceName,

	String regType,

	String domain

	)

	{

	PeerData peer = new PeerData();



	peer.InterfaceIndex = ifIndex;

	peer.Name = serviceName;

	peer.Type = regType;

	peer.Domain = domain;

	peer.Address = null;



	comboBox1.Items.Remove(peer);

	}

	//
	// ServiceResolved
	//
	// Called by DNSServices core as a result of DNSService.Resolve()
	// call
	//


	public void

	ServiceResolved

	(

	DNSSDService sref,

	DNSSDFlags flags,

	uint ifIndex,

	String fullName,

	String hostName,

	ushort port,

	TXTRecord txtRecord

	)
	{

	m_resolver.Stop();

	m_resolver = null;



	PeerData peer = (PeerData)comboBox1.SelectedItem;



	peer.Port = port;



	try

	{

	m_resolver = m_service.QueryRecord(0, ifIndex, hostName, DNSSDRRType.kDNSSDType_A, DNSSDRRClass.kDNSSDClass_IN, m_eventManager );

	}

	catch

	{

	MessageBox.Show("QueryRecord Failed", "Error");

	Application.Exit();

	}
	}

	//
	// QueryAnswered
	//
	// Called by DNSServices core as a result of DNSService.QueryRecord()
	// call
	//

	public void
	QueryAnswered
	(
	DNSSDService service,
	DNSSDFlags flags,
	uint ifIndex,
	String fullName,
	DNSSDRRType rrtype,
	DNSSDRRClass rrclass,
	Object rdata,
	uint ttl
	)
	{

	m_resolver.Stop();

	m_resolver = null;



	PeerData peer = (PeerData) comboBox1.SelectedItem;


	uint bits = BitConverter.ToUInt32( (Byte[])rdata, 0);
	System.Net.IPAddress address = new System.Net.IPAddress(bits);

	peer.Address = address;
	}



	public void

	OperationFailed

	(

	DNSSDService service,

	DNSSDError error

	)

	{

	MessageBox.Show("Operation returned an error code " + error, "Error");

	}



	//

	// OnReadMessage

	//

	// Called when there is data to be read on a socket

	//

	// This is called (indirectly) from OnReadSocket()

	//

	private void

	OnReadMessage

	(

	String msg

	)

	{

	int rgb = 0;



	for (int i = 0; i < msg.Length && msg[i] != ':'; i++)

	{

	rgb = rgb ^ ((int)msg[i] << (i % 3 + 2) * 8);

	}



	Color color = Color.FromArgb(rgb & 0x007F7FFF);

	richTextBox1.SelectionColor = color;

	richTextBox1.AppendText(msg + Environment.NewLine);

	}

	//
	// OnReadSocket
	//
	// Called by the .NET core when there is data to be read on a socket
	//
	// This is called from a worker thread by the .NET core
	//
	private void
	OnReadSocket
	(
	IAsyncResult ar
	)
	{
	try
	{
	int read = m_socket.EndReceive(ar);

	if (read > 0)
	{
	String msg = Encoding.UTF8.GetString(m_buffer, 0, read);
	Invoke(m_readMessageCallback, new Object[]{msg});
	}

	m_socket.BeginReceive(m_buffer, 0, BUFFER_SIZE, 0, new AsyncCallback(OnReadSocket), this);
	}
	catch
	{
	}
	}


	public SimpleChat()
	{
	//
	// Required for Windows Form Designer support
	//
	InitializeComponent();



	try

	{

	m_service = new DNSSDService();

	}

	catch

	{

	MessageBox.Show("Bonjour Service is not available", "Error");

	Application.Exit();

	}



	m_eventManager = new DNSSDEventManager();

	m_eventManager.ServiceRegistered += new _IDNSSDEvents_ServiceRegisteredEventHandler(this.ServiceRegistered);

	m_eventManager.ServiceFound += new _IDNSSDEvents_ServiceFoundEventHandler(this.ServiceFound);

	m_eventManager.ServiceLost += new _IDNSSDEvents_ServiceLostEventHandler(this.ServiceLost);

	m_eventManager.ServiceResolved += new _IDNSSDEvents_ServiceResolvedEventHandler(this.ServiceResolved);

	m_eventManager.QueryRecordAnswered += new _IDNSSDEvents_QueryRecordAnsweredEventHandler(this.QueryAnswered);

	m_eventManager.OperationFailed += new _IDNSSDEvents_OperationFailedEventHandler(this.OperationFailed);

	m_readMessageCallback = new ReadMessageCallback(OnReadMessage);

	this.Load += new System.EventHandler(this.Form1_Load);

	this.AcceptButton = button1;
	}

	/// <summary>
	/// Clean up any resources being used.
	/// </summary>
	protected override void
	Dispose( bool disposing )
	{
	if( disposing )
	{
	if (components != null)
	{
	components.Dispose();
	}

	if (m_registrar != null)
	{
	m_registrar.Stop();
	}

	if (m_browser != null)
	{
	m_browser.Stop();
	}



	if (m_resolver != null)

	{

	m_resolver.Stop();

	}



	m_eventManager.ServiceFound -= new _IDNSSDEvents_ServiceFoundEventHandler(this.ServiceFound);

	m_eventManager.ServiceLost -= new _IDNSSDEvents_ServiceLostEventHandler(this.ServiceLost);

	m_eventManager.ServiceResolved -= new _IDNSSDEvents_ServiceResolvedEventHandler(this.ServiceResolved);

	m_eventManager.QueryRecordAnswered -= new _IDNSSDEvents_QueryRecordAnsweredEventHandler(this.QueryAnswered);

	m_eventManager.OperationFailed -= new _IDNSSDEvents_OperationFailedEventHandler(this.OperationFailed);
	}
	base.Dispose( disposing );
	}

	#region Windows Form Designer generated code
	/// <summary>
	/// Required method for Designer support - do not modify
	/// the contents of this method with the code editor.
	/// </summary>
	private void InitializeComponent()
	{
	this.comboBox1 = new System.Windows.Forms.ComboBox();
	this.textBox2 = new System.Windows.Forms.TextBox();
	this.button1 = new System.Windows.Forms.Button();
	this.label1 = new System.Windows.Forms.Label();
	this.richTextBox1 = new System.Windows.Forms.RichTextBox();
	this.SuspendLayout();
	//
	// comboBox1
	//
	this.comboBox1.Anchor = ((System.Windows.Forms.AnchorStyles.Bottom \| System.Windows.Forms.AnchorStyles.Left)
	\| System.Windows.Forms.AnchorStyles.Right);
	this.comboBox1.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
	this.comboBox1.Location = new System.Drawing.Point(59, 208);
	this.comboBox1.Name = "comboBox1";
	this.comboBox1.Size = new System.Drawing.Size(224, 21);
	this.comboBox1.Sorted = true;
	this.comboBox1.TabIndex = 5;
	this.comboBox1.SelectedIndexChanged += new System.EventHandler(this.comboBox1_SelectedIndexChanged);
	//
	// textBox2
	//
	this.textBox2.Anchor = ((System.Windows.Forms.AnchorStyles.Bottom \| System.Windows.Forms.AnchorStyles.Left)
	\| System.Windows.Forms.AnchorStyles.Right);
	this.textBox2.Location = new System.Drawing.Point(8, 248);
	this.textBox2.Name = "textBox2";
	this.textBox2.ScrollBars = System.Windows.Forms.ScrollBars.Horizontal;
	this.textBox2.Size = new System.Drawing.Size(192, 20);
	this.textBox2.TabIndex = 2;
	this.textBox2.Text = "";
	this.textBox2.TextChanged += new System.EventHandler(this.textBox2_TextChanged);
	//
	// button1
	//
	this.button1.Anchor = (System.Windows.Forms.AnchorStyles.Bottom \| System.Windows.Forms.AnchorStyles.Right);
	this.button1.Enabled = false;
	this.button1.Location = new System.Drawing.Point(208, 248);
	this.button1.Name = "button1";
	this.button1.TabIndex = 3;
	this.button1.Text = "Send";
	this.button1.Click += new System.EventHandler(this.button1_Click);
	//
	// label1
	//
	this.label1.Anchor = (System.Windows.Forms.AnchorStyles.Bottom \| System.Windows.Forms.AnchorStyles.Left);
	this.label1.Location = new System.Drawing.Point(8, 210);
	this.label1.Name = "label1";
	this.label1.Size = new System.Drawing.Size(48, 16);
	this.label1.TabIndex = 4;
	this.label1.Text = "Talk To:";
	//
	// richTextBox1
	//
	this.richTextBox1.Anchor = (((System.Windows.Forms.AnchorStyles.Top \| System.Windows.Forms.AnchorStyles.Bottom)
	\| System.Windows.Forms.AnchorStyles.Left)
	\| System.Windows.Forms.AnchorStyles.Right);
	this.richTextBox1.Location = new System.Drawing.Point(8, 8);
	this.richTextBox1.Name = "richTextBox1";
	this.richTextBox1.ReadOnly = true;
	this.richTextBox1.Size = new System.Drawing.Size(272, 184);
	this.richTextBox1.TabIndex = 1;
	this.richTextBox1.Text = "";
	//
	// Form1
	//
	this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
	this.ClientSize = new System.Drawing.Size(292, 273);
	this.Controls.AddRange(new System.Windows.Forms.Control[] {
	this.richTextBox1,
	this.label1,
	this.button1,
	this.textBox2,
	this.comboBox1});
	this.Name = "Form1";
	this.Text = "SimpleChat.NET";
	this.ResumeLayout(false);

	}
	#endregion

	private void Form1_Load(object sender, EventArgs e)
	{
	IPEndPoint localEP = new IPEndPoint(System.Net.IPAddress.Any, 0);

	//
	// create the socket and bind to INADDR_ANY
	//
	m_socket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
	m_socket.Bind(localEP);
	localEP = (IPEndPoint) m_socket.LocalEndPoint;

	//
	// start asynchronous read
	//
	m_socket.BeginReceive(m_buffer, 0, BUFFER_SIZE, 0, new AsyncCallback(this.OnReadSocket), this);

	try
	{
	//
	// start the register and browse operations
	//
	m_registrar = m_service.Register( 0, 0, System.Environment.UserName, "_p2pchat._udp", null, null, ( ushort ) localEP.Port, null, m_eventManager );
	}
	catch
	{
	MessageBox.Show("Bonjour service is not available", "Error");
	Application.Exit();
	}
	}

	/// <summary>
	/// The main entry point for the application.
	/// </summary>
	[STAThread]
	static void Main()
	{
	Application.Run(new SimpleChat());
	}

	//
	// send the message to a peer
	//
	private void button1_Click(object sender, System.EventArgs e)
	{
	PeerData peer = (PeerData) comboBox1.SelectedItem;

	String message = m_name + ": " + textBox2.Text;

	Byte[] bytes = Encoding.UTF8.GetBytes(message);

	IPEndPoint endPoint = new IPEndPoint( peer.Address, peer.Port );



	m_socket.SendTo(bytes, endPoint);

	richTextBox1.SelectionColor = Color.Black;

	richTextBox1.AppendText(textBox2.Text + "\n");

	textBox2.Text = "";
	}

	//
	// called when typing in message box
	//
	private void textBox2_TextChanged(object sender, System.EventArgs e)
	{
	PeerData peer = (PeerData) comboBox1.SelectedItem;
	button1.Enabled = ((peer.Address != null) && (textBox2.Text.Length > 0));
	}

	//
	// called when peer target changes
	//
	/// <summary>
	/// </summary>
	/// <param name="sender"></param>
	/// <param name="e"></param>
	private void comboBox1_SelectedIndexChanged(object sender, System.EventArgs e)
	{
	PeerData peer = (PeerData) comboBox1.SelectedItem;

	try
	{
	m_resolver = m_service.Resolve(0, peer.InterfaceIndex, peer.Name, peer.Type, peer.Domain, m_eventManager);
	}
	catch
	{
	MessageBox.Show("Unable to Resolve service", "Error");
	Application.Exit();
	}
	}
	}



	//

	// PeerData

	//

	// Holds onto the information associated with a peer on the network

	//

	public class PeerData

	{

	public uint InterfaceIndex;

	public String Name;

	public String Type;

	public String Domain;

	public IPAddress Address;

	public int Port;



	public override String

	ToString()

	{

	return Name;

	}



	public override bool

	Equals(object other)

	{

	bool result = false;



	if (other != null)

	{

	if ((object)this == other)

	{

	result = true;

	}

	else if (other is PeerData)

	{

	PeerData otherPeerData = (PeerData)other;



	result = (this.Name == otherPeerData.Name);

	}

	}



	return result;

	}



	public override int

	GetHashCode()

	{

	return Name.GetHashCode();

	}

	};
	}