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STUN Client

, 20 Apr 2007 CPOL
STUN client C# implementation with sample application
Stun
Net
docs
dns
dns_records.jpg
dns_records.vsd
Net
_junk
_Obsolete
_Stuff
AUTH
bin
Release
LumiSoft.Net.dll
Data
Dns
Client
FTP
Client
Server
HTTP
Server
ICMP
IMAP
Client
Server
IO
Log
LumiSoft.Net
Mime
vCard
Net.csproj.user
Net.suo
NNTP
Client
POP3
Client
Server
SDP
ServersCore
SIP
Client
Message
Proxy
Stack
SMTP
Client
Server
STUN
Client
Message
STUN_Client_app
STUN_Client_app.suo
STUN_Client_app
bin
Debug
LumiSoft.Net.dll
STUN_Client_app.exe
STUN_Client_app.vshost.exe
dep
LumiSoft.Net.dll
Properties
using System;
using System.Collections.Generic;
using System.Text;
using System.Drawing;
using System.Windows.Forms;
using System.Net;
using System.Net.Sockets;

using LumiSoft.Net.STUN.Client;

namespace STUN_Client_app
{
    /// <summary>
    /// Application main window.
    /// </summary>
    public class wfrm_Main : Form
    {
        private Label         mt_Server         = null;
        private TextBox       m_pServer         = null;
        private NumericUpDown m_pPort           = null;
        private Label         mt_NetType        = null;
        private TextBox       m_pNetType        = null;
        private Label         mt_LocalEndPoint  = null;
        private TextBox       m_pLocalEndPoint  = null;
        private Label         mt_PublicEndPoint = null;
        private TextBox       m_pPublicEndPoint = null;
        private Button        m_pGet            = null;
        private Button        m_pClose          = null;

        /// <summary>
        /// Default constructor.
        /// </summary>
        public wfrm_Main()
        {
            InitUI();
        }

        #region mehtod InitUI

        /// <summary>
        /// Creates and initilizes UI.
        /// </summary>
        private void InitUI()
        {
            this.ClientSize = new Size(380,155);
            this.StartPosition = FormStartPosition.CenterScreen;
            this.FormBorderStyle = FormBorderStyle.FixedDialog;
            this.Text = "STUN client demo";

            mt_Server = new Label();
            mt_Server.Size = new Size(100,20);
            mt_Server.Location = new Point(0,10);
            mt_Server.TextAlign = ContentAlignment.MiddleRight;
            mt_Server.Text = "STUN server:";

            m_pServer = new TextBox();
            m_pServer.Size = new Size(200,20);
            m_pServer.Location = new Point(105,10);
            m_pServer.Text = "stunserver.org";

            m_pPort = new NumericUpDown();
            m_pPort.Size = new Size(60,20);
            m_pPort.Location = new Point(310,10);
            m_pPort.Minimum = 1;
            m_pPort.Maximum = 99999;
            m_pPort.Value = 3478;

            mt_NetType = new Label();
            mt_NetType.Size = new Size(100,20);
            mt_NetType.Location = new Point(0,35);
            mt_NetType.TextAlign = ContentAlignment.MiddleRight;
            mt_NetType.Text = "NET type:";

            m_pNetType = new TextBox();
            m_pNetType.Size = new Size(265,20);
            m_pNetType.Location = new Point(105,35);
            m_pNetType.ReadOnly = true;

            mt_LocalEndPoint = new Label();
            mt_LocalEndPoint.Size = new Size(100,20);
            mt_LocalEndPoint.Location = new Point(0,60);
            mt_LocalEndPoint.TextAlign = ContentAlignment.MiddleRight;
            mt_LocalEndPoint.Text = "Local end point:";

            m_pLocalEndPoint = new TextBox();
            m_pLocalEndPoint.Size = new Size(265,20);
            m_pLocalEndPoint.Location = new Point(105,60);
            m_pLocalEndPoint.ReadOnly = true;

            mt_PublicEndPoint = new Label();
            mt_PublicEndPoint.Size = new Size(100,20);
            mt_PublicEndPoint.Location = new Point(0,85);
            mt_PublicEndPoint.TextAlign = ContentAlignment.MiddleRight;
            mt_PublicEndPoint.Text = "Public end point:";

            m_pPublicEndPoint = new TextBox();
            m_pPublicEndPoint.Size = new Size(265,20);
            m_pPublicEndPoint.Location = new Point(105,85);
            m_pPublicEndPoint.ReadOnly = true;

            m_pGet = new Button();
            m_pGet.Size = new Size(70,20);
            m_pGet.Location = new Point(220,120);
            m_pGet.Text = "Get";
            m_pGet.Click += new EventHandler(m_pGet_Click);

            m_pClose = new Button();
            m_pClose.Size = new Size(70,20);
            m_pClose.Location = new Point(300,120);
            m_pClose.Text = "Close";
            m_pClose.Click += new EventHandler(m_pClose_Click);

            this.Controls.Add(mt_Server);
            this.Controls.Add(m_pPort);
            this.Controls.Add(m_pServer);
            this.Controls.Add(mt_NetType);
            this.Controls.Add(m_pNetType);
            this.Controls.Add(mt_LocalEndPoint);
            this.Controls.Add(m_pLocalEndPoint);
            this.Controls.Add(mt_PublicEndPoint);
            this.Controls.Add(m_pPublicEndPoint);
            this.Controls.Add(m_pGet);
            this.Controls.Add(m_pClose);
        }
                                
        #endregion


        #region Events Handling

        #region method m_pGet_Click

        private void m_pGet_Click(object sender,EventArgs e)
        {
            this.Cursor = Cursors.WaitCursor;
            try{
                if(string.IsNullOrEmpty(m_pServer.Text)){
                    MessageBox.Show(this,"Please specify STUN server !","Error:",MessageBoxButtons.OK,MessageBoxIcon.Error);
                    return;
                }

                Socket socket = new Socket(AddressFamily.InterNetwork,SocketType.Dgram,ProtocolType.Udp);
                socket.Bind(new IPEndPoint(IPAddress.Any,0));

                STUN_Result result = STUN_Client.Query(m_pServer.Text,3478,socket);
                m_pNetType.Text = result.NetType.ToString();
                m_pLocalEndPoint.Text = socket.LocalEndPoint.ToString();
                if(result.NetType != STUN_NetType.UdpBlocked){
                    m_pPublicEndPoint.Text = result.PublicEndPoint.ToString();
                }
                else{
                    m_pPublicEndPoint.Text = "";
                }                
            }
            catch(Exception x){
                MessageBox.Show(this,"Error: " + x.ToString(),"Error:",MessageBoxButtons.OK,MessageBoxIcon.Error);
            }
            finally{
                this.Cursor = Cursors.Default;
            }
        }

        #endregion

        #region method m_pClose_Click

        private void m_pClose_Click(object sender,EventArgs e)
        {
            this.Close();
        }

        #endregion

        #endregion

    }
}

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This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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About the Author

Ivar Lumi
Estonia Estonia
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