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TCPUtil.cs
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TCPUtil.cs
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// Copyright (c) 2011 John Trimis
//
// MIT license:
// Permission is hereby granted, free of charge, to any person obtaining a copy of
// this software and associated documentation files (the "Software"), to deal in
// the Software without restriction, including without limitation the rights to
// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
// the Software, and to permit persons to whom the Software is furnished to do so,
// subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
using System;
using System.Windows.Forms;
using System.Net;
using System.Net.Sockets;
using System.Collections;
using System.Collections.Generic;
namespace TCPUtil
{ // NameSpace : TCPUtil
/// <summary>
/// An asynchronous socket server and client.
/// </summary>
public class TCPUtil : System.Windows.Forms.Form
{ // CLASS : TCPUtil
/// <summary>
/// The main callback for Worker Sockets
/// </summary>
public AsyncCallback WorkerCallBack;
/// <summary>
/// The main collection of sockets that actually do things
/// </summary>
private List<Socket> WorkerSockets = new List<Socket>();
private Queue OutgoingData;
public TCPUtil()
{ // CONSTRUCTOR
//
// The InitializeComponent() call is required for Windows Forms designer support.
//
InitializeComponent();
OutgoingData = new Queue();
} // CONSTRUCTOR
#region Windows Forms Designer generated code
[STAThread]
public static void Main(string[] args)
{ // Main
Application.Run(new TCPUtil());
} // Main
private ContextMenuStrip mnuTX;
private System.ComponentModel.IContainer components;
private ToolStripMenuItem mnuTXSelectAll;
private ToolStripMenuItem mnuTXCopy;
private ToolStripMenuItem mnuTxPaste;
private ToolStripSeparator toolStripSeparator1;
private ToolStripMenuItem mnuTxSendAllSelected;
private TextBox txtTXMessage;
private SplitContainer splitContainer1;
private System.Windows.Forms.Label lblPort;
private System.Windows.Forms.Label lblHost;
private System.Windows.Forms.Button btnDisconnect;
private System.Windows.Forms.Button btnConnect;
private System.Windows.Forms.Button btnBind;
private System.Windows.Forms.Button btnSend;
private System.Windows.Forms.TextBox txtIP;
private System.Windows.Forms.TextBox txtPort;
private System.Windows.Forms.ListBox lstConnections;
private System.Windows.Forms.RichTextBox richTextRxMessage;
private System.Windows.Forms.Button btnRXClear;
private System.Windows.Forms.Button btnSaveToDisk;
private System.Windows.Forms.SaveFileDialog dlgSave;
/// <summary>
/// This method is required for Windows Forms designer support.
/// Do not change the method contents inside the source code editor. The Forms designer might
/// not be able to load this method if it was changed manually.
/// </summary>
private void InitializeComponent() {
this.components = new System.ComponentModel.Container();
System.ComponentModel.ComponentResourceManager resources = new System.ComponentModel.ComponentResourceManager(typeof(TCPUtil));
this.btnSend = new System.Windows.Forms.Button();
this.mnuTX = new System.Windows.Forms.ContextMenuStrip(this.components);
this.mnuTXSelectAll = new System.Windows.Forms.ToolStripMenuItem();
this.mnuTXCopy = new System.Windows.Forms.ToolStripMenuItem();
this.mnuTxPaste = new System.Windows.Forms.ToolStripMenuItem();
this.toolStripSeparator1 = new System.Windows.Forms.ToolStripSeparator();
this.mnuTxSendAllSelected = new System.Windows.Forms.ToolStripMenuItem();
this.richTextRxMessage = new System.Windows.Forms.RichTextBox();
this.txtPort = new System.Windows.Forms.TextBox();
this.btnConnect = new System.Windows.Forms.Button();
this.txtIP = new System.Windows.Forms.TextBox();
this.btnDisconnect = new System.Windows.Forms.Button();
this.lblHost = new System.Windows.Forms.Label();
this.lblPort = new System.Windows.Forms.Label();
this.btnBind = new System.Windows.Forms.Button();
this.btnRXClear = new System.Windows.Forms.Button();
this.btnSaveToDisk = new System.Windows.Forms.Button();
this.lstConnections = new System.Windows.Forms.ListBox();
this.txtTXMessage = new System.Windows.Forms.TextBox();
this.splitContainer1 = new System.Windows.Forms.SplitContainer();
this.mnuTX.SuspendLayout();
this.splitContainer1.Panel1.SuspendLayout();
this.splitContainer1.Panel2.SuspendLayout();
this.splitContainer1.SuspendLayout();
this.SuspendLayout();
//
// btnSend
//
this.btnSend.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Right)));
this.btnSend.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
this.btnSend.Location = new System.Drawing.Point(694, 444);
this.btnSend.Name = "btnSend";
this.btnSend.Size = new System.Drawing.Size(87, 24);
this.btnSend.TabIndex = 14;
this.btnSend.Text = "Send";
this.btnSend.Click += new System.EventHandler(this.BtnSend_Click);
//
// mnuTX
//
this.mnuTX.Items.AddRange(new System.Windows.Forms.ToolStripItem[] {
this.mnuTXSelectAll,
this.mnuTXCopy,
this.mnuTxPaste,
this.toolStripSeparator1,
this.mnuTxSendAllSelected});
this.mnuTX.Name = "mnuTX";
this.mnuTX.Size = new System.Drawing.Size(165, 98);
//
// mnuTXSelectAll
//
this.mnuTXSelectAll.Name = "mnuTXSelectAll";
this.mnuTXSelectAll.Size = new System.Drawing.Size(164, 22);
this.mnuTXSelectAll.Text = "Select &All";
this.mnuTXSelectAll.Click += new System.EventHandler(this.mnuTXSelectAll_Click);
//
// mnuTXCopy
//
this.mnuTXCopy.Name = "mnuTXCopy";
this.mnuTXCopy.Size = new System.Drawing.Size(164, 22);
this.mnuTXCopy.Text = "&Copy";
this.mnuTXCopy.Click += new System.EventHandler(this.mnuTXCopy_Click);
//
// mnuTxPaste
//
this.mnuTxPaste.Name = "mnuTxPaste";
this.mnuTxPaste.Size = new System.Drawing.Size(164, 22);
this.mnuTxPaste.Text = "&Paste";
this.mnuTxPaste.Click += new System.EventHandler(this.mnuTxPaste_Click);
//
// toolStripSeparator1
//
this.toolStripSeparator1.Name = "toolStripSeparator1";
this.toolStripSeparator1.Size = new System.Drawing.Size(161, 6);
//
// mnuTxSendAllSelected
//
this.mnuTxSendAllSelected.Name = "mnuTxSendAllSelected";
this.mnuTxSendAllSelected.Size = new System.Drawing.Size(164, 22);
this.mnuTxSendAllSelected.Text = "Send All Selected";
this.mnuTxSendAllSelected.Click += new System.EventHandler(this.mnuTxSendAllSelected_Click);
//
// richTextRxMessage
//
this.richTextRxMessage.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom)
| System.Windows.Forms.AnchorStyles.Left)
| System.Windows.Forms.AnchorStyles.Right)));
this.richTextRxMessage.BackColor = System.Drawing.SystemColors.InactiveCaptionText;
this.richTextRxMessage.ForeColor = System.Drawing.SystemColors.Menu;
this.richTextRxMessage.Location = new System.Drawing.Point(3, 0);
this.richTextRxMessage.MinimumSize = new System.Drawing.Size(200, 200);
this.richTextRxMessage.Name = "richTextRxMessage";
this.richTextRxMessage.ReadOnly = true;
this.richTextRxMessage.Size = new System.Drawing.Size(374, 411);
this.richTextRxMessage.TabIndex = 1;
this.richTextRxMessage.Text = "";
//
// txtPort
//
this.txtPort.Location = new System.Drawing.Point(248, 2);
this.txtPort.Name = "txtPort";
this.txtPort.Size = new System.Drawing.Size(40, 20);
this.txtPort.TabIndex = 6;
this.txtPort.Text = "8000";
//
// btnConnect
//
this.btnConnect.BackColor = System.Drawing.Color.Transparent;
this.btnConnect.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
this.btnConnect.ForeColor = System.Drawing.Color.Black;
this.btnConnect.Location = new System.Drawing.Point(294, 2);
this.btnConnect.Name = "btnConnect";
this.btnConnect.Size = new System.Drawing.Size(64, 24);
this.btnConnect.TabIndex = 7;
this.btnConnect.Text = "Connect";
this.btnConnect.UseVisualStyleBackColor = false;
this.btnConnect.Click += new System.EventHandler(this.BtnConnect_Click);
//
// txtIP
//
this.txtIP.Location = new System.Drawing.Point(40, 2);
this.txtIP.Name = "txtIP";
this.txtIP.Size = new System.Drawing.Size(168, 20);
this.txtIP.TabIndex = 3;
this.txtIP.Text = "127.0.0.1";
//
// btnDisconnect
//
this.btnDisconnect.BackColor = System.Drawing.Color.Transparent;
this.btnDisconnect.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
this.btnDisconnect.ForeColor = System.Drawing.Color.Black;
this.btnDisconnect.Location = new System.Drawing.Point(442, 2);
this.btnDisconnect.Name = "btnDisconnect";
this.btnDisconnect.Size = new System.Drawing.Size(88, 24);
this.btnDisconnect.TabIndex = 15;
this.btnDisconnect.Text = "Disconnect";
this.btnDisconnect.UseVisualStyleBackColor = false;
this.btnDisconnect.Click += new System.EventHandler(this.BtnDisconnect_Click);
//
// lblHost
//
this.lblHost.Location = new System.Drawing.Point(8, 3);
this.lblHost.Name = "lblHost";
this.lblHost.Size = new System.Drawing.Size(32, 16);
this.lblHost.TabIndex = 4;
this.lblHost.Text = "Host:";
this.lblHost.TextAlign = System.Drawing.ContentAlignment.MiddleRight;
//
// lblPort
//
this.lblPort.Location = new System.Drawing.Point(216, 3);
this.lblPort.Name = "lblPort";
this.lblPort.Size = new System.Drawing.Size(32, 16);
this.lblPort.TabIndex = 5;
this.lblPort.Text = "Port:";
this.lblPort.TextAlign = System.Drawing.ContentAlignment.MiddleRight;
//
// btnBind
//
this.btnBind.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
this.btnBind.Location = new System.Drawing.Point(364, 2);
this.btnBind.Name = "btnBind";
this.btnBind.Size = new System.Drawing.Size(72, 24);
this.btnBind.TabIndex = 16;
this.btnBind.Text = "Bind";
this.btnBind.Click += new System.EventHandler(this.btnBind_Click);
//
// btnRXClear
//
this.btnRXClear.Location = new System.Drawing.Point(707, 2);
this.btnRXClear.Name = "btnRXClear";
this.btnRXClear.Size = new System.Drawing.Size(72, 22);
this.btnRXClear.TabIndex = 18;
this.btnRXClear.Text = "Clear";
this.btnRXClear.Click += new System.EventHandler(this.btnRXClear_Click);
//
// btnSaveToDisk
//
this.btnSaveToDisk.Location = new System.Drawing.Point(621, 2);
this.btnSaveToDisk.Name = "btnSaveToDisk";
this.btnSaveToDisk.Size = new System.Drawing.Size(80, 22);
this.btnSaveToDisk.TabIndex = 20;
this.btnSaveToDisk.Text = "SaveToDisk";
this.btnSaveToDisk.Click += new System.EventHandler(this.btnSaveToDisk_Click);
//
// lstConnections
//
this.lstConnections.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Left)
| System.Windows.Forms.AnchorStyles.Right)));
this.lstConnections.FormattingEnabled = true;
this.lstConnections.Location = new System.Drawing.Point(2, 442);
this.lstConnections.Name = "lstConnections";
this.lstConnections.SelectionMode = System.Windows.Forms.SelectionMode.None;
this.lstConnections.Size = new System.Drawing.Size(684, 69);
this.lstConnections.TabIndex = 21;
//
// txtTXMessage
//
this.txtTXMessage.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom)
| System.Windows.Forms.AnchorStyles.Left)
| System.Windows.Forms.AnchorStyles.Right)));
this.txtTXMessage.ContextMenuStrip = this.mnuTX;
this.txtTXMessage.Location = new System.Drawing.Point(3, 0);
this.txtTXMessage.MinimumSize = new System.Drawing.Size(200, 200);
this.txtTXMessage.Multiline = true;
this.txtTXMessage.Name = "txtTXMessage";
this.txtTXMessage.Size = new System.Drawing.Size(389, 411);
this.txtTXMessage.TabIndex = 23;
this.txtTXMessage.KeyDown += new System.Windows.Forms.KeyEventHandler(this.txtTXMessage_KeyDown);
//
// splitContainer1
//
this.splitContainer1.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom)
| System.Windows.Forms.AnchorStyles.Left)
| System.Windows.Forms.AnchorStyles.Right)));
this.splitContainer1.Location = new System.Drawing.Point(2, 27);
this.splitContainer1.Name = "splitContainer1";
//
// splitContainer1.Panel1
//
this.splitContainer1.Panel1.Controls.Add(this.txtTXMessage);
//
// splitContainer1.Panel2
//
this.splitContainer1.Panel2.Controls.Add(this.richTextRxMessage);
this.splitContainer1.Size = new System.Drawing.Size(779, 411);
this.splitContainer1.SplitterDistance = 395;
this.splitContainer1.TabIndex = 24;
//
// TCPUtil
//
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(784, 512);
this.Controls.Add(this.lstConnections);
this.Controls.Add(this.btnSaveToDisk);
this.Controls.Add(this.btnRXClear);
this.Controls.Add(this.btnBind);
this.Controls.Add(this.txtPort);
this.Controls.Add(this.btnDisconnect);
this.Controls.Add(this.btnConnect);
this.Controls.Add(this.lblPort);
this.Controls.Add(this.lblHost);
this.Controls.Add(this.txtIP);
this.Controls.Add(this.btnSend);
this.Controls.Add(this.splitContainer1);
this.Icon = ((System.Drawing.Icon)(resources.GetObject("$this.Icon")));
this.MinimumSize = new System.Drawing.Size(800, 550);
this.Name = "TCPUtil";
this.Text = "TCP Util";
this.mnuTX.ResumeLayout(false);
this.splitContainer1.Panel1.ResumeLayout(false);
this.splitContainer1.Panel1.PerformLayout();
this.splitContainer1.Panel2.ResumeLayout(false);
this.splitContainer1.ResumeLayout(false);
this.ResumeLayout(false);
this.PerformLayout();
}
#endregion
#region GUI Methods
/// <summary>
/// Send everything in the buffer out to all connected sockets.
/// </summary>
void SendBuffer()
{ // METHOD : SendBuffer
byte[] buffer = GetBytes();
foreach ( Socket thisSocket in this.WorkerSockets )
{ // Step through all sockets
if ( thisSocket != null )
{ // SocketCreated
if ( thisSocket.Connected )
{ // Socket connected
try
{ // TRY
thisSocket.Send( buffer, 0, buffer.Length, SocketFlags.None );
} // TRY
catch
{ // CATCH
thisSocket.Close();
UpdateControls();
} // CATCH
} // Socket connected
} // Socket created
} // StepThrough all sockets
} // METHOD : SendBuffer
/// <summary>
/// Get the byte[] to send down the socket. Fixes any special chars
/// </summary>
/// <returns>
/// byte[] ready to be sent
/// </returns>
private byte[] FixString( string strMsg )
{ // METHOD : FixString
strMsg = strMsg.Replace( "\r", "" ); // Carriage Returns
strMsg = strMsg.Replace( "\n", "" ); // Line Feeds
// We don't really care about these characters.
// if someone wanted a Carriage Returns, they
// should put a <0D> or a <0A>
for ( int i = 0 ; i < 256 ; i++ )
{ // StepThrough Chars 1-256
string StringVal = i.ToString( "X" );
string BinVal = Convert.ToString( (char)i );
strMsg = strMsg.Replace( "<" + StringVal.ToLower() + ">", BinVal );
strMsg = strMsg.Replace( "<" + StringVal.ToUpper() + ">", BinVal );
if ( StringVal.Length == 1 )
{ // Single Digit Hex Value
// We are doing this because we want to detect both <B> and <0B> as they are both valid.
strMsg = strMsg.Replace( "<" + "0" + StringVal.ToLower() + ">", BinVal );
} // Single Digit Hex Value
} // Step Through Chars 1-256
///This section defines some special character shortcuts, these are the ANSII names
///for the unprintable characters. These are probably not right, but its what I know
///the chars as and is easiest for me.
strMsg = strMsg.Replace( "<NUL>", "\x0" );
strMsg = strMsg.Replace( "<NULL>", "\x0" );
strMsg = strMsg.Replace( "<SOH>", "\x1" );
strMsg = strMsg.Replace( "<STX>", "\x2" );
strMsg = strMsg.Replace( "<ETX>", "\x3" );
strMsg = strMsg.Replace( "<EOT>", "\x4" );
strMsg = strMsg.Replace( "<ENQ>", "\x5" );
strMsg = strMsg.Replace( "<ACK>", "\x6" );
strMsg = strMsg.Replace( "<BEL>", "\x7");
strMsg = strMsg.Replace( "<BS>", "\x8" );
strMsg = strMsg.Replace( "<TAB>", "\x9" );
strMsg = strMsg.Replace( "<LF>", "\xA" );
strMsg = strMsg.Replace( "<VT>", "\xB" );
strMsg = strMsg.Replace( "<FF>", "\xC" );
strMsg = strMsg.Replace( "<CR>", "\xD" );
strMsg = strMsg.Replace( "<SO>", "\xE" );
strMsg = strMsg.Replace( "<SI>", "\xF" );
strMsg = strMsg.Replace( "<DLE>", "\x10" );
strMsg = strMsg.Replace( "<DC1>", "\x11" );
strMsg = strMsg.Replace( "<DC2>", "\x12" );
strMsg = strMsg.Replace( "<DC3>", "\x13" );
strMsg = strMsg.Replace( "<DC4>", "\x14" );
strMsg = strMsg.Replace( "<NAK>", "\x15" );
strMsg = strMsg.Replace( "<SYN>", "\x16" );
strMsg = strMsg.Replace( "<ETB>", "\x17" );
strMsg = strMsg.Replace( "<CAN>", "\x18" );
strMsg = strMsg.Replace( "<EM>", "\x19" );
strMsg = strMsg.Replace( "<SUB>", "\x1A" );
strMsg = strMsg.Replace( "<ESC>", "\x1B" );
strMsg = strMsg.Replace( "<FS>", "\x1C" );
strMsg = strMsg.Replace( "<GS>", "\x1D" );
strMsg = strMsg.Replace( "<RS>", "\x1E" );
strMsg = strMsg.Replace( "<US>", "\x1F" );
///Note, we can't use ASCII encoding, because ASCII is a 7 bit encoding and therefor only
///has 128 chars, the chars 128-255 are not in ASCII. Those chars are in the ANSI character
///set and then into the ISO-8859-1 character set which is backward compatible with ANSI.
System.Text.Encoding enc = System.Text.Encoding.GetEncoding( "ISO-8859-1" );
return enc.GetBytes( strMsg );
} // METHOD : FixString
/// <summary>
/// Blank Delegate needed to call UpdateGUI
/// </summary>
public delegate void GUIUpdater();
/// <summary>
/// Executes on its own thread to update the GUI with the connections and button states
/// </summary>
private void UpdateGUI()
{ // METHOD : UpdateGUI
btnConnect.Enabled = true;
btnDisconnect.Enabled = false;
btnBind.Enabled = true;
lock ( this.WorkerSockets )
{ // LOCK : WorkerSockets
this.lstConnections.Items.Clear();
bool somethingConnected = false;
foreach ( Socket thisSocket in this.WorkerSockets )
{ // Step Through All Sockets
string Descriptor = "";
if ( thisSocket.IsBound )
{ // Listening
Descriptor += "Local:" + thisSocket.LocalEndPoint;
somethingConnected = true;
} // Listening
if ( thisSocket.Connected )
{ // Connected
Descriptor += " - Remote:" + thisSocket.RemoteEndPoint.ToString();
somethingConnected = true;
} // Connected
if ( Descriptor != "" )
{ // Connected And/Or Bound
this.lstConnections.Items.Add( Descriptor );
} // Connected And/Or Bound
} // Step Through All Sockets
if ( somethingConnected )
{ // At Least One Socket Was Connected
btnConnect.Enabled = false;
btnBind.Enabled = false;
btnDisconnect.Enabled = true;
} // At Least One Socket Was Connected
} // LOCK : WorkerSockets
} // METHOD : UpdateGUI
/// <summary>
/// Update all the GUI Controls (spawns a new thread to do it)
/// </summary>
public void UpdateControls()
{ // METHOD : UpdateControls
try
{ // TRY
CleanupDeadSockets();
this.Invoke( new GUIUpdater( UpdateGUI ) );
} // TRY
catch { }
} // METHOD : UpdateControls
/// <summary>
/// Method that actually writes data to the RX text box (executes on its own thread)
/// </summary>
/// <param name="Message">
/// Message to report was received
/// </param>
public void WriteToGUI( string Message )
{ // METHOD : WriteToGUI
this.richTextRxMessage.AppendText( Message );
} // METHOD : WriteToGUI
/// <summary>
/// Delegate needed to link WriteRX to WriteToGUI
/// </summary>
/// <param name="Message">
/// string to pass to either WriteRX or WriteToGUI method
/// </param>
public delegate void StringWriter( string Message );
/// <summary>
/// Writes some content into the RX textbox (spawns a new thread to do this.
/// </summary>
/// <param name="Message">
/// string to report as received on the socket
/// </param>
public void WriteRX( string Message )
{ // METHOD : WriteRX
try
{
this.richTextRxMessage.Invoke( new StringWriter( WriteToGUI ), new object[] { Message } );
}
catch { }
} // METHOD : WriteRX
/// <summary>
/// Figure out when the User is trying to use a keyboard shortcut (select all or
/// Ctrl+A in this case)
/// </summary>
private void txtTXMessage_KeyDown( object sender, KeyEventArgs e )
{ // METHOD : txtTXMessage_KeyDown
if ( e.Control )
{ // User Pressed [Ctrl]
if ( e.KeyCode == Keys.A )
{ // User Pressed [Ctrl] + [A]
this.txtTXMessage.SelectAll();
} // User Pressed [Ctrl] + [A]
} // User Pressed [Ctrl]
} // METHOD : txtTXMessage_KeyDown
#endregion
#region Buttons
/// <summary>
/// The Close Button was clicked
/// </summary>
private void BtnClose_Click( object sender, System.EventArgs e )
{ // METHOD : BtnClose_Click
ShutDown();
Application.Exit();
} // METHOD : BtnClose_Click
private void BtnConnect_Click( object sender, System.EventArgs e )
{ // BtnConnect_Click
// See if we have text on the IP and Port text fields
if ( txtIP.Text == "" || txtPort.Text == "" )
{ // Blank IP Or Port
MessageBox.Show( "IP Address and Port Number are required to connect to the Server\n" );
return;
} // Blank IP Or Port
try
{ // TRY
UInt16 port;
if ( UInt16.TryParse( txtPort.Text, out port ) )
{ // Valid Port
IPAddress ip;
if ( IPAddress.TryParse( this.txtIP.Text, out ip ) )
{ // Valid IP Address
Socket thisSock = new Socket( AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp );
IPEndPoint ipEnd = new IPEndPoint( ip, port );
// Connect to the remote host
thisSock.Connect( ipEnd );
this.WorkerSockets.Add( thisSock );
if ( thisSock.Connected )
{ // Connect Successful
UpdateControls();
WaitForData(thisSock);
} // Connect Successful
} // Valid IP Address
} // Valid Port
} // TRY
catch (SocketException se)
{ // CATCH : Socket Exception
MessageBox.Show( "\nConnection failed, is the server running?\n" + se.Message );
UpdateControls();
ShutDown();
} // CATCH : Socket Exception
} // METHOD : BtnConnect_Click
/// <summary>
/// The Send Button was clicked
/// </summary>
private void BtnSend_Click(object sender, System.EventArgs e)
{ // METHOD : BtnSend_Click
try
{ // TRY
Send( FixString( this.txtTXMessage.Text ) );
SendBuffer();
} // TRY
catch
{
}
finally
{ // FINALLY
UpdateControls();
} // FINALLY
} // METHOD : BtnSend_Click
/// <summary>
/// The Disconnect button was clicked
/// </summary>
void BtnDisconnect_Click(object sender, System.EventArgs e)
{ // METHOD : BtnDisconnect_Click
ShutDown();
} // METHOD : BtnDisconnect_Click
/// <summary>
/// The Bind button was clicked
/// </summary>
private void btnBind_Click( object sender, System.EventArgs e )
{ // METHOD : btnBind_Click
try
{ // TRY
// Check the port value
UInt16 port;
if ( UInt16.TryParse( txtPort.Text, out port ) )
{ // Valid Port
Socket MainSocket = new Socket( AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp );
IPEndPoint ipLocal = new IPEndPoint( IPAddress.Any, port );
MainSocket.Bind( ipLocal );
MainSocket.Listen( 4 );
MainSocket.BeginAccept( new AsyncCallback( OnClientConnect ), MainSocket ); // This will go on listening until someone tries
// to connect, then the OnClientConnect callback
// will fire and we can deal with it there. We
// are passing in this socket object as the state
// object. This will allow us to keep track of
// this particular socket so we only try to accept
// connections on the one socket we are bound to.
this.WorkerSockets.Add( MainSocket );
UpdateControls();
} // Valid Port
else
{ // Invalid Port
MessageBox.Show( "Please enter a Port Number" );
return;
} // Invalid Port
} // TRY
catch
{ // CATCH
UpdateControls();
ShutDown();
} // CATCH
} // METHOD : btnBind_Click
/// <summary>
/// Save button was clicked
/// </summary>
private void btnSaveToDisk_Click( object sender, System.EventArgs e )
{ // METHOD : btnSaveToDisk_Click
dlgSave = new SaveFileDialog();
dlgSave.ShowDialog();
dlgSave.FileOk += new System.ComponentModel.CancelEventHandler( dlgSave_FileOk );
} // METHOD : btnSaveToDisk_Click
/// <summary>
/// The OK button was clicked on the "Save File As" dialog
/// </summary>
void dlgSave_FileOk( object sender, System.ComponentModel.CancelEventArgs e )
{ // METHOD : dlgSave_FileOk
System.IO.Stream strmOutput = dlgSave.OpenFile();
System.Text.Encoding enc = System.Text.Encoding.GetEncoding( "ISO-8859-1" );
byte[] RawOutput = System.Text.Encoding.ASCII.GetBytes( this.richTextRxMessage.Text );
strmOutput.Write( RawOutput, 0, RawOutput.Length );
strmOutput.Close();
} // METHOD : dlgSave_FileOk
/// <summary>
/// Clears all content from the TX Box
/// </summary>
private void btnTXClear_Click( object sender, System.EventArgs e )
{ // METHOD : btnTXClear_Click
this.txtTXMessage.Clear();
} // METHOD : btnTXClear_Click
/// <summary>
/// Clears all content from the RX Box
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnRXClear_Click( object sender, System.EventArgs e )
{ // METHOD : btnRXClear_Click
this.richTextRxMessage.Clear();
} // METHOD : btnRXClear_Click
#endregion
#region Socket Handling Methods
/// <summary>
/// Close all sockets
/// </summary>
public void ShutDown()
{ // METHOD : ShutDown
lock ( this.WorkerSockets )
{ // LOCK : WorkerSockets
foreach ( Socket thisSocket in this.WorkerSockets )
{ // Step Through All Sockets
thisSocket.Close();
} // Step Through All Sockets
} // LOCK : WorkerSockets
UpdateControls();
} // METHOD : ShutDown
/// <summary>
/// Get rid of any sockets that are no longer connected
/// </summary>
public void CleanupDeadSockets()
{ // METHOD : CleanupDeadSockets
int i = 0;
lock ( this.WorkerSockets )
{ // LOCK : WorkerSockets
while ( i < this.WorkerSockets.Count )
{ // Step Through Sockets
if ( this.WorkerSockets[i] == null )
{ // Null Socket
this.WorkerSockets.RemoveAt( i );
} // Null Socket
else
{ // Valid Socket
try
{ // TRY
if ( this.WorkerSockets[i].IsBound || this.WorkerSockets[i].Connected )
{ // Connected Socket
int k = this.WorkerSockets[i].Available; // This really does nothing, but it will cause
// an exception to get thrown if the socket is
// not valid. The exception is handled and the
// socket is treated just as if the socket were
// not connected.
i++;
} // Connected Socket
else
{ // Disconnected Socket
this.WorkerSockets[i].Close();
this.WorkerSockets.RemoveAt( i );
} // Disconnected Socket
} // TRY
catch
{ // CATCH
this.WorkerSockets[i].Close();
this.WorkerSockets.RemoveAt( i );
} // CATCH
} // Valid Socket
} // Step Through Sockets
} // LOCK : WorkerSockets
} // METHOD : CleanupDeadSockets
/// <summary>
/// Databuffer + socket container object. Used as a state object for the socket
/// </summary>
public class SocketPacket
{ // SocketPacket
public System.Net.Sockets.Socket thisSocket;
public byte[] dataBuffer = new byte[256];
} // SocketPacket
#endregion
#region SocketIO
/// <summary>
/// Add One byte to the outbound buffer to be sent down the sockets
/// </summary>
/// <param name="Character">
/// Send a single Character
/// </param>
protected void Send( byte Character )
{ // METHOD : Send
this.OutgoingData.Enqueue( Character );
} // METHOD : Send
/// <summary>
/// Start waiting for data from the client
/// </summary>
/// <param name="thisSocket">
/// Socket to wait on
/// </param>
public void WaitForData( System.Net.Sockets.Socket thisSocket )
{ // METHOD : WaitForData
try
{ // TRY
if (WorkerCallBack == null)
{ // Callback not created yet
// Specify the call back function which is to be
// invoked when there is any write activity by the
// connected client
WorkerCallBack = new AsyncCallback(OnDataReceived);
} // Callback not created yet
SocketPacket theSocPkt = new SocketPacket();
theSocPkt.thisSocket = thisSocket;
// Start receiving any data written by the connected client
// asynchronously
thisSocket.BeginReceive(theSocPkt.dataBuffer, 0,
theSocPkt.dataBuffer.Length,
SocketFlags.None,
WorkerCallBack,
theSocPkt);
} // TRY
catch (SocketException)
{ // CATCH : SocketException
///We kill this one socket, that is probably already in the .Connected=false
///state, but just for fun we .Close it here. Then we call UpdateControls
///which calls CleanUpDeadSockets which will get rid of this. No error message
///will be displayed, but this connection will drop out of the connection list
///at the bottom of the window.
thisSocket.Close();
this.UpdateControls();
} // CATCH : SocketException
} // WaitForData
/// <summary>
/// Gets a byte[] of all the data queued to be sent down the socket
/// </summary>
/// <returns>
/// byte[] containing data to be sent
/// </returns>
protected byte[] GetBytes()
{ // METHOD : GetBytes
byte[] output = new byte[this.OutgoingData.Count];
int i = 0;
while ( this.OutgoingData.Count > 0 )
{ // Step Through All Bytes
output[i] = (byte)this.OutgoingData.Dequeue();
i++;
} // Step Through All Bytes
return output;
} // METHOD : GetBytes
/// <summary>
/// Add a byte[] to be sent down the sockets
/// </summary>
/// <param name="Sequence">
/// byte[] to send
/// </param>
protected void Send( byte[] Sequence )
{ // METHOD : Send
foreach( byte thisByte in Sequence )