Subversion Repositories general

using System;

using System.Drawing;

using System.Collections;

using System.Windows.Forms;

using System.IO;

using System.Net;

using System.Text;

using System.Text.RegularExpressions;

using System.Xml;

// FIXME:

//   - add soap validation

//   - icons for all items in the tree

//   - use pool of threads?

//   - do not store intermediate info, just row packets and the parsed fragments to display

//   - make the text fragment store switchable

//   - save/restore window layout

namespace TCPproxy

{

	public class MainForm : System.Windows.Forms.Form

	{

		#region constants and settings

		private const int RECENT_LENGTH = 5;

		#endregion constants and settings

		#region private fields

		private ListenForm   listenForm     = new ListenForm();

		private TcpListener  tcpListener    = null;

		private LogMessages  logMessages    = null;

		private Hashtable    treeNodes      = new Hashtable();

		private ArrayList    recentItems    = new ArrayList();

        private int          listenPort;

        private string       resendHost;

        private int          resendPort;

		private TcpShowMode  tcpShowMode    = TcpShowMode.ByDirection;

		private bool         autoExpand     = true;

		private string       defaultCaption;

		#endregion private fields

		#region web forms fields

        private System.ComponentModel.IContainer components;

		private System.Windows.Forms.SaveFileDialog saveLogDialog;

        private System.Windows.Forms.StatusBarPanel connectionStatusBar;

        private System.Windows.Forms.MenuItem selectAllmenuItem;

        private System.Windows.Forms.MenuItem copyMenuItem;

        private System.Windows.Forms.ContextMenu viewContextMenu;

        private System.Windows.Forms.MenuItem closeConnectionMenuItem;

		private System.Windows.Forms.ImageList saveButtonImageList;

        private System.Windows.Forms.StatusBar statusBar;

        private System.Windows.Forms.ContextMenu messagesContextMenu;

		private System.Windows.Forms.ImageList treeImageList;

		private System.Windows.Forms.MenuItem wordWrapMenuItem;

        private MainMenu mainMenu;

        private MenuItem fileMenu;

        private MenuItem loadBinLogMenuItem;

        private MenuItem saveBinLogMenuItem;

        private MenuItem menuSeparator1;

        private MenuItem exitMenuItem;

        private MenuItem viewMenu;

        private MenuItem clearMainMenuItem;

        private MenuItem messagesMenu;

        private MenuItem saveFullLogMenuItem;

        private MenuItem saveTcoLogMenuItem;

        private MenuItem saveHttpLogMenuItem;

        private MenuItem saveXmlLogMenuItem;

        private MenuItem menuSeparator2;

        private MenuItem allMessagesMenuItem;

        private MenuItem importantMessagesMenuItem;

        private MenuItem infoMessagesMenuItem;

        private MenuItem menuSeparator3;

        private MenuItem tcpShowByDirectionMenuItem;

        private MenuItem tcpShowByTimeMenuItem;

        private MenuItem menuSeparator4;

        private MenuItem autoExpandMenuItem;

        private MenuItem wordWrapMainMenuItem;

        private MenuItem helpMenu;

        private Panel panel1;

        private Panel panel3;

        private Panel panel4;

        private ViewControl messagesBox;

        private Splitter splitter2;

        private ListBox logBox;

        private Splitter splitter1;

        private TreeView messageView;

        private MenuItem startMenuItem;

        private MenuItem stopMenuItem;

        private MenuItem menuSeparator5;

		private MenuItem recentListeningMenu;

		private MenuItem recentListeningNoItem;

        private MenuItem aboutMenuItem;

		#endregion web forms fields

		#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.components = new System.ComponentModel.Container();

			System.ComponentModel.ComponentResourceManager resources = new System.ComponentModel.ComponentResourceManager(typeof(MainForm));

			this.wordWrapMenuItem = new System.Windows.Forms.MenuItem();

			this.treeImageList = new System.Windows.Forms.ImageList(this.components);

			this.messagesContextMenu = new System.Windows.Forms.ContextMenu();

			this.selectAllmenuItem = new System.Windows.Forms.MenuItem();

			this.copyMenuItem = new System.Windows.Forms.MenuItem();

			this.statusBar = new System.Windows.Forms.StatusBar();

			this.connectionStatusBar = new System.Windows.Forms.StatusBarPanel();

			this.saveButtonImageList = new System.Windows.Forms.ImageList(this.components);

			this.closeConnectionMenuItem = new System.Windows.Forms.MenuItem();

			this.viewContextMenu = new System.Windows.Forms.ContextMenu();

			this.saveLogDialog = new System.Windows.Forms.SaveFileDialog();

			this.mainMenu = new System.Windows.Forms.MainMenu();

			this.fileMenu = new System.Windows.Forms.MenuItem();

			this.startMenuItem = new System.Windows.Forms.MenuItem();

			this.stopMenuItem = new System.Windows.Forms.MenuItem();

			this.menuSeparator5 = new System.Windows.Forms.MenuItem();

			this.loadBinLogMenuItem = new System.Windows.Forms.MenuItem();

			this.saveBinLogMenuItem = new System.Windows.Forms.MenuItem();

			this.menuSeparator1 = new System.Windows.Forms.MenuItem();

			this.saveFullLogMenuItem = new System.Windows.Forms.MenuItem();

			this.saveTcoLogMenuItem = new System.Windows.Forms.MenuItem();

			this.saveHttpLogMenuItem = new System.Windows.Forms.MenuItem();

			this.saveXmlLogMenuItem = new System.Windows.Forms.MenuItem();

			this.menuSeparator2 = new System.Windows.Forms.MenuItem();

			this.exitMenuItem = new System.Windows.Forms.MenuItem();

			this.viewMenu = new System.Windows.Forms.MenuItem();

			this.clearMainMenuItem = new System.Windows.Forms.MenuItem();

			this.messagesMenu = new System.Windows.Forms.MenuItem();

			this.allMessagesMenuItem = new System.Windows.Forms.MenuItem();

			this.infoMessagesMenuItem = new System.Windows.Forms.MenuItem();

			this.importantMessagesMenuItem = new System.Windows.Forms.MenuItem();

			this.menuSeparator3 = new System.Windows.Forms.MenuItem();

			this.tcpShowByDirectionMenuItem = new System.Windows.Forms.MenuItem();

			this.tcpShowByTimeMenuItem = new System.Windows.Forms.MenuItem();

			this.menuSeparator4 = new System.Windows.Forms.MenuItem();

			this.autoExpandMenuItem = new System.Windows.Forms.MenuItem();

			this.wordWrapMainMenuItem = new System.Windows.Forms.MenuItem();

			this.helpMenu = new System.Windows.Forms.MenuItem();

			this.aboutMenuItem = new System.Windows.Forms.MenuItem();

			this.panel1 = new System.Windows.Forms.Panel();

			this.panel3 = new System.Windows.Forms.Panel();

			this.panel4 = new System.Windows.Forms.Panel();

			this.messagesBox = new TCPproxy.ViewControl();

			this.splitter2 = new System.Windows.Forms.Splitter();

			this.logBox = new System.Windows.Forms.ListBox();

			this.splitter1 = new System.Windows.Forms.Splitter();

			this.messageView = new System.Windows.Forms.TreeView();

			this.recentListeningMenu = new System.Windows.Forms.MenuItem();

			this.recentListeningNoItem = new System.Windows.Forms.MenuItem();

			((System.ComponentModel.ISupportInitialize)(this.connectionStatusBar)).BeginInit();

			this.panel1.SuspendLayout();

			this.panel3.SuspendLayout();

			this.panel4.SuspendLayout();

			this.SuspendLayout();

			//

			// wordWrapMenuItem

			//

			this.wordWrapMenuItem.Index = 2;

			this.wordWrapMenuItem.Text = "Word &Wrap";

			this.wordWrapMenuItem.Click += new System.EventHandler(this.wordWrapMenuItem_Click);

			//

			// treeImageList

			//

			this.treeImageList.ImageStream = ((System.Windows.Forms.ImageListStreamer)(resources.GetObject("treeImageList.ImageStream")));

			this.treeImageList.TransparentColor = System.Drawing.Color.Magenta;

			//

			// messagesContextMenu

			//

			this.messagesContextMenu.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {

            this.selectAllmenuItem,

            this.copyMenuItem,

            this.wordWrapMenuItem});

			//

			// selectAllmenuItem

			//

			this.selectAllmenuItem.Index = 0;

			this.selectAllmenuItem.Shortcut = System.Windows.Forms.Shortcut.CtrlA;

			this.selectAllmenuItem.Text = "Select &All";

			this.selectAllmenuItem.Click += new System.EventHandler(this.selectAllMenuItem_Click);

			//

			// copyMenuItem

			//

			this.copyMenuItem.Index = 1;

			this.copyMenuItem.Shortcut = System.Windows.Forms.Shortcut.CtrlC;

			this.copyMenuItem.Text = "&Copy";

			this.copyMenuItem.Click += new System.EventHandler(this.copyMenuItem_Click);

			//

			// statusBar

			//

			this.statusBar.Location = new System.Drawing.Point(0, 619);

			this.statusBar.Name = "statusBar";

			this.statusBar.Panels.AddRange(new System.Windows.Forms.StatusBarPanel[] {

            this.connectionStatusBar});

			this.statusBar.ShowPanels = true;

			this.statusBar.Size = new System.Drawing.Size(780, 22);

			this.statusBar.TabIndex = 0;

			//

			// connectionStatusBar

			//

			this.connectionStatusBar.AutoSize = System.Windows.Forms.StatusBarPanelAutoSize.Spring;

			this.connectionStatusBar.Width = 764;

			//

			// saveButtonImageList

			//

			this.saveButtonImageList.ImageStream = ((System.Windows.Forms.ImageListStreamer)(resources.GetObject("saveButtonImageList.ImageStream")));

			this.saveButtonImageList.TransparentColor = System.Drawing.Color.Magenta;

			//

			// closeConnectionMenuItem

			//

			this.closeConnectionMenuItem.Index = 0;

			this.closeConnectionMenuItem.Text = "&Close connection";

			this.closeConnectionMenuItem.Click += new System.EventHandler(this.closeConnectionMenuItem_Click);

			//

			// viewContextMenu

			//

			this.viewContextMenu.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {

            this.closeConnectionMenuItem});

			//

			// saveLogDialog

			//

			this.saveLogDialog.DefaultExt = "txt";

			this.saveLogDialog.Filter = "Text Files|*.txt|All Files|*.*";

			this.saveLogDialog.Title = "Save Log";

			//

			// mainMenu

			//

			this.mainMenu.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {

	            this.fileMenu,

	            this.viewMenu,

	            this.helpMenu});

			//

			// fileMenu

			//

			this.fileMenu.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {

	            this.startMenuItem,

	            this.stopMenuItem,

	            this.recentListeningMenu,

	            this.menuSeparator5,

	            this.loadBinLogMenuItem,

	            this.saveBinLogMenuItem,

	            this.menuSeparator1,

	            this.saveFullLogMenuItem,

	            this.saveTcoLogMenuItem,

	            this.saveHttpLogMenuItem,

	            this.saveXmlLogMenuItem,

	            this.menuSeparator2,

	            this.exitMenuItem});

			this.fileMenu.Text = "File";

			//

			// startMenuItem

			//

			this.startMenuItem.Text = "Start...";

			this.startMenuItem.Click += new System.EventHandler(this.startMenuItem_Click);

			//

			// stopMenuItem

			//

			this.stopMenuItem.Enabled = false;

			this.stopMenuItem.Text = "Stop";

			this.stopMenuItem.Click += new System.EventHandler(this.stopMenuItem_Click);

			//

			// menuSeparator5

			//

			this.menuSeparator5.Text = "-";

			//

			// loadBinLogMenuItem

			//

			this.loadBinLogMenuItem.Text = "Load Bin Log...";

			//

			// saveBinLogMenuItem

			//

			this.saveBinLogMenuItem.Text = "Save Bin Log...";

			this.saveBinLogMenuItem.Click += new System.EventHandler(this.saveBinLogMenuItem_Click);

			//

			// menuSeparator1

			//

			this.menuSeparator1.Text = "-";

			//

			// saveFullLogMenuItem

			//

			this.saveFullLogMenuItem.Text = "Save Full Text Log...";

			this.saveFullLogMenuItem.Click += new System.EventHandler(this.saveLogMenuItem_Click);

			//

			// saveTcoLogMenuItem

			//

			this.saveTcoLogMenuItem.Text = "Save TCP Log...";

			this.saveTcoLogMenuItem.Click += new System.EventHandler(this.saveTcpMenuItem_Click);

			//

			// saveHttpLogMenuItem

			//

			this.saveHttpLogMenuItem.Text = "Save Http Log...";

			this.saveHttpLogMenuItem.Click += new System.EventHandler(this.saveHttpMenuItem_Click);

			//

			// saveXmlLogMenuItem

			//

			this.saveXmlLogMenuItem.Text = "Save XML Log...";

			this.saveXmlLogMenuItem.Click += new System.EventHandler(this.saveXmlMenuItem_Click);

			//

			// menuSeparator2

			//

			this.menuSeparator2.Text = "-";

			//

			// exitMenuItem

			//

			this.exitMenuItem.Text = "Exit";

			//

			// viewMenu

			//

			this.viewMenu.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {

	            this.clearMainMenuItem,

	            this.messagesMenu,

	            this.menuSeparator3,

	            this.tcpShowByDirectionMenuItem,

	            this.tcpShowByTimeMenuItem,

	            this.menuSeparator4,

	            this.autoExpandMenuItem,

	            this.wordWrapMainMenuItem});

			this.viewMenu.Text = "View";

			//

			// clearMainMenuItem

			//

			this.clearMainMenuItem.Text = "Clear";

			this.clearMainMenuItem.Click += new System.EventHandler(this.clearMenuItem_Click);

			//

			// messagesMenu

			//

			this.messagesMenu.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {

	            this.allMessagesMenuItem,

	            this.infoMessagesMenuItem,

	            this.importantMessagesMenuItem});

			this.messagesMenu.Text = "Messages";

			//

			// allMessagesMenuItem

			//

			this.allMessagesMenuItem.Checked = true;

			this.allMessagesMenuItem.Text = "All";

			this.allMessagesMenuItem.Click += new System.EventHandler(this.messagesMenuItem_Click);

			//

			// infoMessagesMenuItem

			//

			this.infoMessagesMenuItem.Text = "Info";

			this.infoMessagesMenuItem.Click += new System.EventHandler(this.messagesMenuItem_Click);

			//

			// importantMessagesMenuItem

			//

			this.importantMessagesMenuItem.Text = "Important";

			this.importantMessagesMenuItem.Click += new System.EventHandler(this.messagesMenuItem_Click);

			//

			// menuSeparator3

			//

			this.menuSeparator3.Text = "-";

			//

			// tcpShowByDirectionMenuItem

			//

			this.tcpShowByDirectionMenuItem.Checked = true;

			this.tcpShowByDirectionMenuItem.Text = "TCP Show by Direction";

			this.tcpShowByDirectionMenuItem.Click += new System.EventHandler(this.tcpShowByDirectionMenuItem_Click);

			//

			// tcpShowByTimeMenuItem

			//

			this.tcpShowByTimeMenuItem.Text = "TCP Show by Time";

			this.tcpShowByTimeMenuItem.Click += new System.EventHandler(this.tcpShowByTimeMenuItem_Click);

			//

			// menuSeparator4

			//

			this.menuSeparator4.Text = "-";

			//

			// autoExpandMenuItem

			//

			this.autoExpandMenuItem.Text = "Auto Expand";

			this.autoExpandMenuItem.Click += new System.EventHandler(this.autoExpandMenuItem_Click);

			//

			// wordWrapMainMenuItem

			//

			this.wordWrapMainMenuItem.Text = "Word Wrap";

			this.wordWrapMainMenuItem.Click += new System.EventHandler(this.wordWrapMenuItem_Click);

			//

			// helpMenu

			//

			this.helpMenu.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {

            	this.aboutMenuItem});

			this.helpMenu.Text = "Help";

			//

			// aboutMenuItem

			//

			this.aboutMenuItem.Text = "About...";

			this.aboutMenuItem.Click += new System.EventHandler(this.aboutMenuItem_Click);

			//

			// panel1

			//

			this.panel1.Controls.Add(this.panel3);

			this.panel1.Dock = System.Windows.Forms.DockStyle.Fill;

			this.panel1.Location = new System.Drawing.Point(0, 24);

			this.panel1.Name = "panel1";

			this.panel1.Size = new System.Drawing.Size(780, 595);

			this.panel1.TabIndex = 11;

			//

			// panel3

			//

			this.panel3.Controls.Add(this.panel4);

			this.panel3.Controls.Add(this.splitter1);

			this.panel3.Controls.Add(this.messageView);

			this.panel3.Dock = System.Windows.Forms.DockStyle.Fill;

			this.panel3.Location = new System.Drawing.Point(0, 0);

			this.panel3.Name = "panel3";

			this.panel3.Size = new System.Drawing.Size(780, 595);

			this.panel3.TabIndex = 5;

			//

			// panel4

			//

			this.panel4.Controls.Add(this.messagesBox);

			this.panel4.Controls.Add(this.splitter2);

			this.panel4.Controls.Add(this.logBox);

			this.panel4.Dock = System.Windows.Forms.DockStyle.Fill;

			this.panel4.Location = new System.Drawing.Point(163, 0);

			this.panel4.Name = "panel4";

			this.panel4.Size = new System.Drawing.Size(617, 595);

			this.panel4.TabIndex = 13;

			//

			// messagesBox

			//

			this.messagesBox.ContextMenu = this.messagesContextMenu;

			this.messagesBox.Dock = System.Windows.Forms.DockStyle.Fill;

			this.messagesBox.Font = new System.Drawing.Font("Courier New", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));

			this.messagesBox.Location = new System.Drawing.Point(0, 0);

			this.messagesBox.Name = "messagesBox";

			this.messagesBox.Size = new System.Drawing.Size(617, 524);

			this.messagesBox.TabIndex = 7;

			this.messagesBox.WordWrap = true;

			//

			// splitter2

			//

			this.splitter2.Dock = System.Windows.Forms.DockStyle.Bottom;

			this.splitter2.Location = new System.Drawing.Point(0, 524);

			this.splitter2.Name = "splitter2";

			this.splitter2.Size = new System.Drawing.Size(617, 3);

			this.splitter2.TabIndex = 9;

			this.splitter2.TabStop = false;

			//

			// logBox

			//

			this.logBox.Dock = System.Windows.Forms.DockStyle.Bottom;

			this.logBox.Font = new System.Drawing.Font("Courier New", 9.75F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));

			this.logBox.HorizontalScrollbar = true;

			this.logBox.ItemHeight = 16;

			this.logBox.Location = new System.Drawing.Point(0, 527);

			this.logBox.Name = "logBox";

			this.logBox.ScrollAlwaysVisible = true;

			this.logBox.Size = new System.Drawing.Size(617, 68);

			this.logBox.TabIndex = 8;

			//

			// splitter1

			//

			this.splitter1.Location = new System.Drawing.Point(160, 0);

			this.splitter1.Name = "splitter1";

			this.splitter1.Size = new System.Drawing.Size(3, 595);

			this.splitter1.TabIndex = 12;

			this.splitter1.TabStop = false;

			//

			// messageView

			//

			this.messageView.ContextMenu = this.viewContextMenu;

			this.messageView.Dock = System.Windows.Forms.DockStyle.Left;

			this.messageView.HideSelection = false;

			this.messageView.ImageIndex = 0;

			this.messageView.ImageList = this.treeImageList;

			this.messageView.Location = new System.Drawing.Point(0, 0);

			this.messageView.Name = "messageView";

			this.messageView.SelectedImageIndex = 0;

			this.messageView.Size = new System.Drawing.Size(160, 595);

			this.messageView.TabIndex = 11;

			//

			// recentListeningMenu

			//

			this.recentListeningMenu.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {

            	this.recentListeningNoItem});

			this.recentListeningMenu.Text = "Recent Listenings";

			//

			// recentListeningNoItem

			//

			this.recentListeningNoItem.Enabled = false;

			this.recentListeningNoItem.Text = "(no items)";

			//

			// MainForm

			//

			this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);

			this.ClientSize = new System.Drawing.Size(780, 641);

			this.Controls.Add(this.panel1);

			this.Controls.Add(this.statusBar);

			this.Menu = this.mainMenu;

			this.MinimumSize = new System.Drawing.Size(400, 200);

			this.Name = "MainForm";

			this.Text = "TCPproxy";

			((System.ComponentModel.ISupportInitialize)(this.connectionStatusBar)).EndInit();

			this.panel1.ResumeLayout(false);

			this.panel3.ResumeLayout(false);

			this.panel4.ResumeLayout(false);

			this.ResumeLayout(false);

			this.PerformLayout();

		}

		#endregion

		#region windows forms methods

		public MainForm()

		{

			InitializeComponent();

			logMessages = new LogMessages(logBox);

			try {

				LoadFromRegistry();

				LoadRecentItemsFromRegistry();

			}

			catch(Exception) {}

			// update visual elements

			UpdateMessagesMenuItems();

			if(tcpShowMode == TcpShowMode.ByDirection) {

				tcpShowByDirectionMenuItem.Checked = true;

				tcpShowByTimeMenuItem.Checked      = false;

			}

			else {

				tcpShowByDirectionMenuItem.Checked = false;

				tcpShowByTimeMenuItem.Checked      = true;

			}

			autoExpandMenuItem.Checked   = autoExpand;

			wordWrapMainMenuItem.Checked = messagesBox.WordWrap;

			// save default values

			defaultCaption = this.Text;

		}

		protected override void Dispose(bool disposing)

		{

			if(tcpListener != null) {

				tcpListener.StopListening();    // stop listening

				tcpListener.CancelAll();        // cancel all open connections

			}

			// save settings

			SaveToRegistry();

			SaveRecentItemsToRegistry();

			if( disposing )

			{

				if (components != null)

				{

					components.Dispose();

				}

			}

			base.Dispose( disposing );

		}

		[STAThread]

		static void Main()

		{

			Application.Run(new MainForm());

		}

		private LogLevel ParseLogLevel(string str)

		{

			if(str == "Important")

				return LogLevel.Important;

			else if(str == "Info")

				return LogLevel.Info;

			else

				return LogLevel.Debug;

		}

		private void LoadFromRegistry()

		{

			Microsoft.Win32.RegistryKey subkey = Microsoft.Win32.Registry.CurrentUser.OpenSubKey(

				@"Software\Anatoli Klassen\TCPproxy");

			if(subkey == null) return;

			listenPort           = (int)subkey.GetValue("Listen Port", 0);

			resendHost           = (string)subkey.GetValue("Resend Host", "");

			resendPort           = (int)subkey.GetValue("Resend Port", 0);

			logMessages.Level    = ParseLogLevel((string)subkey.GetValue("Messages Level", ""));

			autoExpand           = (int)subkey.GetValue("Auto Expand", 1) == 1;

			messagesBox.WordWrap = (int)subkey.GetValue("Word Wrap", 1) == 1;

			object tcpShowModeStr  = (object)subkey.GetValue("Tcp Show Mode", TcpShowMode.ByDirection);

			tcpShowMode            = (tcpShowModeStr as string) == "ByDirection"

				? TcpShowMode.ByDirection : TcpShowMode.ByTime;

//			this.Top   = (int)subkey.GetValue("Window.Top", this.Top);

//			this.Left  = (int)subkey.GetValue("Window.Left", this.Left);

//			this.Hight = (int)subkey.GetValue("Window.Hight", this.Hight);

//			this.Width = (int)subkey.GetValue("Window.Width", this.Width);

		}

		private void LoadRecentItemsFromRegistry()

		{

			Microsoft.Win32.RegistryKey subkey = Microsoft.Win32.Registry.CurrentUser.OpenSubKey(

				@"Software\Anatoli Klassen\TCPproxy\Recent Listenings");

			if(subkey == null) return;

			foreach(string name in subkey.GetValueNames()) {

				if(name == "") continue;

				AddRecentItem(RecentItem.LoadFromRegistry((string)subkey.GetValue(name, "")));

			}

		}

		private void SaveToRegistry()

		{

			Microsoft.Win32.RegistryKey subkey = Microsoft.Win32.Registry.CurrentUser.CreateSubKey(

				@"Software\Anatoli Klassen\TCPproxy");

			subkey.SetValue("Listen Port",    listenPort);

			subkey.SetValue("Resend Host",    resendHost == null ? "" : resendHost);

			subkey.SetValue("Resend Port",    resendPort);

			subkey.SetValue("Messages Level", logMessages.Level);

			subkey.SetValue("Tcp Show Mode",  tcpShowMode);

			subkey.SetValue("Auto Expand",    autoExpand ? 1 : 0);

			subkey.SetValue("Word Wrap",      messagesBox.WordWrap ? 1 : 0);

			subkey.SetValue("Window.Top",    this.Top);

			subkey.SetValue("Window.Left",   this.Left);

			subkey.SetValue("Window.Hight",  this.Height);

			subkey.SetValue("Window.Width",  this.Width);

		}

		private void SaveRecentItemsToRegistry()

		{

			Microsoft.Win32.RegistryKey subkey = Microsoft.Win32.Registry.CurrentUser.CreateSubKey(

				@"Software\Anatoli Klassen\TCPproxy\Recent Listenings");

			// load existing from registry

			ArrayList old = new ArrayList();

			foreach(string name in subkey.GetValueNames()) {

				if(name == "") continue;

				old.Add(RecentItem.LoadFromRegistry((string)subkey.GetValue(name, "")));

			}

			// merge - for the case another program instance has changed the list

			foreach(RecentItem item in old) {

				int existingIdx = recentItems.IndexOf(item);

				if(existingIdx >= 0)

					((RecentItem)recentItems[existingIdx]).UpdateTimestamp(item);

				else

					recentItems.Add(item);

			}

			recentItems.Sort();

			if(recentItems.Count > 0) // take tail

				recentItems = recentItems.GetRange(Math.Max(0, recentItems.Count - RECENT_LENGTH),

					Math.Min(recentItems.Count, RECENT_LENGTH));

			int count = 0;

			foreach(RecentItem item in recentItems) {

				subkey.SetValue(string.Format("{0:0000}", count++), item.SaveToRegistry());

			}

		}

		private void startMenuItem_Click(object sender, System.EventArgs e)

		{

			IPAddress resendIp;

			if(!listenForm.Execute(this,

				ref listenPort, ref resendHost, out resendIp, ref resendPort)) return;

			StartListening(listenPort, resendIp, resendPort);

		}

		private void StartListening(int listenPort, IPAddress resendIp, int resendPort)

		{

			// listen to the port

			try

			{

				Start(listenPort, resendIp, resendPort);

			}

			catch(Exception ex)

			{

				MessageBox.Show("Cannot start listening: " + ex.Message, "TCPproxy",

					MessageBoxButtons.OK, MessageBoxIcon.Error);

				Console.WriteLine(ex.Message + " (" + ex.GetType().Name + ")\n" + ex.StackTrace);

				return;

			}

			AddRecentItem(listenPort, resendHost, resendPort);

			startMenuItem.Enabled = false;

			stopMenuItem.Enabled  = true;

			foreach(MenuItem subitem in recentListeningMenu.MenuItems) {

				subitem.Enabled = false;

			}

			this.Text = string.Format("{0}: {1} to {2}:{3}",

				defaultCaption, listenPort, resendHost, resendPort);

		}

		private void stopMenuItem_Click(object sender, System.EventArgs e)

		{

			if(tcpListener != null) tcpListener.StopListening();

			startMenuItem.Enabled = true;

			stopMenuItem.Enabled  = false;

			if(recentItems.Count > 0) {

				foreach(MenuItem subitem in recentListeningMenu.MenuItems) {

					subitem.Enabled = true;

				}

			}

			this.Text = defaultCaption;

		}

		private void clearMenuItem_Click(object sender, System.EventArgs e)

		{

			// close all connetions

			foreach(object tcp in treeNodes.Keys)

				if(tcp is TcpConnection)

					((TcpConnection)tcp).Cancel();

			treeNodes.Clear();

			messageView.Nodes.Clear();

			messagesBox.Clear();

			logMessages.Clear();

		}

		private void selectAllMenuItem_Click(object sender, System.EventArgs e)

		{

			messagesBox.SelectAll();

		}

		private void copyMenuItem_Click(object sender, System.EventArgs e)

		{

			string sel = messagesBox.SelectedText;

			if(sel != null) Clipboard.SetDataObject(sel);

		}

		private void wordWrapMenuItem_Click(object sender, System.EventArgs e)

		{

			messagesBox.WordWrap         = !messagesBox.WordWrap;

			wordWrapMenuItem.Checked     = messagesBox.WordWrap;

			wordWrapMainMenuItem.Checked = messagesBox.WordWrap;

		}

		private void autoExpandMenuItem_Click(object sender, System.EventArgs e)

		{

			autoExpand                 = !autoExpand;

			autoExpandMenuItem.Checked = autoExpand;

		}

		private void aboutMenuItem_Click(object sender, EventArgs e)

		{

			(new AboutForm()).ShowDialog(this);

		}

		private void messageView_BeforeSelect(object sender, System.Windows.Forms.TreeViewCancelEventArgs e)

		{

			if(messageView.SelectedNode == null) return;

			object tag = messageView.SelectedNode.Tag;

			if(tag is TreeNodeData)

			{

				TreeNodeData data = (TreeNodeData)tag;

				data.SaveViewState();

			}

		}

		private void messageView_AfterSelect(object sender, System.Windows.Forms.TreeViewEventArgs e)

		{

			if(messageView.SelectedNode == null) return;

			object tag = messageView.SelectedNode.Tag;

			if(tag is TreeNodeData)

			{

				TreeNodeData data = (TreeNodeData)tag;

				data.Show();

			}

		}

		private void closeConnectionMenuItem_Click(object sender, System.EventArgs e)

		{

			if(messageView.SelectedNode == null) return;

			object tag = messageView.SelectedNode.Tag;

			if(tag is TcpNodeData)

				CloseTcpConnection(((TcpNodeData)tag).Tcp);

			else if(tag is TcpNodeData)

				CloseTcpConnection(((TcpNodeData)messageView.SelectedNode.Parent.Tag).Tcp);

			else if(tag is XmlNodeData)

				CloseTcpConnection(((TcpNodeData)messageView.SelectedNode.Parent.Parent.Tag).Tcp);

		}

		private void tcpShowByDirectionMenuItem_Click(object sender, System.EventArgs e)

		{

			tcpShowMode = TcpShowMode.ByDirection;

			tcpShowByDirectionMenuItem.Checked = true;

			tcpShowByTimeMenuItem.Checked      = false;

			if(messageView.SelectedNode == null) return;

			object tag = messageView.SelectedNode.Tag;

			if(tag is TcpNodeData)

				UpdateTcpNodeInternal(((TcpNodeData)tag).Tcp);

		}

		private void tcpShowByTimeMenuItem_Click(object sender, System.EventArgs e)

		{

			tcpShowMode = TcpShowMode.ByTime;

			tcpShowByDirectionMenuItem.Checked = false;

			tcpShowByTimeMenuItem.Checked      = true;

			if(messageView.SelectedNode == null) return;

			object tag = messageView.SelectedNode.Tag;

			if(tag is TcpNodeData)

				UpdateTcpNodeInternal(((TcpNodeData)tag).Tcp);

		}

		private void saveLogMenuItem_Click(object sender, System.EventArgs e)

		{

			if(saveLogDialog.ShowDialog() == DialogResult.OK)

			{

				SaveLog(saveLogDialog.FileName);

			}

		}

		private void saveTcpMenuItem_Click(object sender, System.EventArgs e)

		{

			if(saveLogDialog.ShowDialog() == DialogResult.OK)

			{

				SaveTcp(saveLogDialog.FileName);

			}

		}

		private void saveHttpMenuItem_Click(object sender, System.EventArgs e)

		{

			if(saveLogDialog.ShowDialog() == DialogResult.OK)

			{

				SaveHttp(saveLogDialog.FileName);

			}

		}

		private void saveXmlMenuItem_Click(object sender, System.EventArgs e)

		{

			if(saveLogDialog.ShowDialog() == DialogResult.OK)

			{

				SaveXml(saveLogDialog.FileName);

			}

		}

		private void messagesMenuItem_Click(object sender, EventArgs e)

		{

			if(sender == importantMessagesMenuItem)

				logMessages.Level = LogLevel.Important;

			else if(sender == infoMessagesMenuItem)

				logMessages.Level = LogLevel.Info;

			else

				logMessages.Level = LogLevel.Debug;

			UpdateMessagesMenuItems();

		}

		private void saveBinLogMenuItem_Click(object sender, EventArgs e)

		{

		}

		private void recentMenuItem_Click(object sender, EventArgs e)

		{

			int n = 0;

			foreach(MenuItem menuItem in recentListeningMenu.MenuItems) {

				if(sender == menuItem) break;

				n++;

			}

			if(n >= recentItems.Count)

				throw new Exception("Unknown sender");

			RecentItem recentItem = (RecentItem)recentItems[n];

			IPAddress  resendIp;

			this.listenPort = recentItem.ListenPort;

			this.resendHost = recentItem.ResendHost;

			this.resendPort = recentItem.ResendPort;

			try

			{

				resendIp = HostUtils.ResendHostToIp(resendHost);

			}

			catch(Exception ex)

			{

				MessageBox.Show(ex.Message);

				return;

			}

			StartListening(listenPort, resendIp, resendPort);

		}

		private void UpdateMessagesMenuItems()

		{

			switch(logMessages.Level) {

				case LogLevel.Critical:

				case LogLevel.Error:

				case LogLevel.Warning:

				case LogLevel.Important:

					importantMessagesMenuItem.Checked = true;

					infoMessagesMenuItem.Checked      = false;

					allMessagesMenuItem.Checked       = false;

					break;

				case LogLevel.Info:

					importantMessagesMenuItem.Checked = false;

					infoMessagesMenuItem.Checked      = true;

					allMessagesMenuItem.Checked       = false;

					break;

				case LogLevel.Debug:

					importantMessagesMenuItem.Checked = false;

					infoMessagesMenuItem.Checked      = false;

					allMessagesMenuItem.Checked       = true;

					break;

			}

		}

		private void AddRecentItem(int listenPort, string resendHost, int resendPort)

		{

			RecentItem recentItem = new RecentItem(listenPort, resendHost, resendPort);

			recentItem.UpdateTimestamp();

			AddRecentItem(recentItem);

		}

		private void AddRecentItem(RecentItem recentItem)

		{

			int existingIdx = recentItems.IndexOf(recentItem);

			if(existingIdx >= 0) {

				// update timestamp of the old item and move it to the top

				((RecentItem)recentItems[existingIdx]).UpdateTimestamp(recentItem);

				MenuItem oldMenuItem = this.recentListeningMenu.MenuItems[existingIdx];

				this.recentListeningMenu.MenuItems.RemoveAt(existingIdx);

				this.recentListeningMenu.MenuItems.Add(0, oldMenuItem);

				return;

			}

			if(recentItems.Count == 0)

				this.recentListeningMenu.MenuItems.RemoveAt(0);

			recentItems.Add(recentItem);

			MenuItem menuItem = new MenuItem();

			this.recentListeningMenu.MenuItems.Add(0, menuItem);

			menuItem.Text   = string.Format("{0} to {1}:{2}",

				recentItem.ListenPort, recentItem.ResendHost, recentItem.ResendPort);

			menuItem.Click += new System.EventHandler(recentMenuItem_Click);

		}

		#endregion windows forms methods

		#region core methods

		private void Start(int listenPort, IPAddress resendHost, int resendPort)

		{

			if(tcpListener != null) tcpListener.StopListening();

			tcpListener = new TcpListener(listenPort, resendHost, resendPort);

			tcpListener.Log    += new TcpLogEventHandler(TcpConnectionLog);

			tcpListener.NewTcp += new TcpConnectionEventHandler(AddTcpConnetion);

			tcpListener.StartListening();

		}

		private void CloseTcpConnection(TcpConnection tcp)

		{

			if(tcp == null) return;

			tcp.Cancel();

		}

		private void SaveLog(string fileName)

		{

			StreamWriter writer = new StreamWriter(fileName);

			foreach(LogMessage message in logMessages.Messages)

			{

				writer.WriteLine(message);

			}

			writer.Close();

		}

		private void SaveTcp(string fileName)

		{

			StreamWriter writer = new StreamWriter(fileName);

			foreach(TreeNode tcpNode in messageView.Nodes)

			{

				TcpNodeData data = (TcpNodeData)tcpNode.Tag;

				data.WriteLog(writer);

			}

			writer.Close();

		}

		private void SaveHttp(string fileName)

		{

			StreamWriter writer = new StreamWriter(fileName);

			foreach(TreeNode tcpNode in messageView.Nodes)

			{

				foreach(TreeNode httpNode in tcpNode.Nodes)

				{

					HttpNodeData data = (HttpNodeData)httpNode.Tag;

					data.WriteLog(writer);

				}

			}

			writer.Close();

		}

		private void SaveXml(string fileName)

		{

			StreamWriter writer = new StreamWriter(fileName);

			foreach(TreeNode tcpNode in messageView.Nodes)

			{

				foreach(TreeNode httpNode in tcpNode.Nodes)

				{

					foreach(TreeNode xmlNode in httpNode.Nodes)

					{

						XmlNodeData data = (XmlNodeData)xmlNode.Tag;

						data.WriteLog(writer);

					}

				}

			}

			writer.Close();

		}

		#endregion core methods

		#region network events handlers

		private void TcpConnectionLog(object sender, TcpLogEventArgs e)

		{

			lock(this)

			{

				TcpConnection tcp = sender as TcpConnection;

				LogMessage message = new LogMessage(tcp, e.Level, e.Message, e.Exception);

				try

				{

					this.BeginInvoke(new AddLogMessageHandler(AddLogMessageInternal), new object[] { message } );

				}

				catch(InvalidOperationException ex)

				{

					if(!this.Disposing && !this.IsDisposed)

						Console.WriteLine(ex.Message + " (" + ex.GetType().Name + ")\n" + ex.StackTrace);

				}

			}

		}

		private void AddTcpConnetion(object sender, TcpConnectionEventArgs e)

		{

			lock(this)

			{

				e.Tcp.Log     += new TcpLogEventHandler(TcpConnectionLog);

				e.Tcp.Update  += new TcpEventHandler(UpdateTcpNode);

				e.Tcp.Close   += new TcpEventHandler(UpdateTcpNode);

				e.Tcp.NewHttp += new TcpHttpEventHandler(AddHttpMessageNode);

				try

				{

					this.BeginInvoke(new AddTcpNodeHandler(AddTcpNodeInternal), new object[] { e.Tcp } );

				}

				catch(InvalidOperationException ex)

				{

					if(!this.Disposing && !this.IsDisposed)

						Console.WriteLine(ex.Message + " (" + ex.GetType().Name + ")\n" + ex.StackTrace);