[C#/COMMON] 네트워크 스캐너 사용하기

TestProject.zip

다운로드

▶ MainForm.cs

using System;
using System.Net;
using System.Net.NetworkInformation;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading;
using System.Windows.Forms;

namespace TestProject
{
    /// <summary>
    /// 메인 폼
    /// </summary>
    public partial class MainForm : Form
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Import
        ////////////////////////////////////////////////////////////////////////////////////////// Static
        //////////////////////////////////////////////////////////////////////////////// Private

        #region ARP 보내기 - SendARP(destinationIP, sourceIP, macAddressByteArray, physicalAddressLength);

        /// <summary>
        /// ARP 보내기
        /// </summary>
        /// <param name="destinationIP">목적 IP</param>
        /// <param name="sourceIP">소스 IP</param>
        /// <param name="macAddressByteArray">MAC 주소 바이트 배열</param>
        /// <param name="physicalAddressLength">물리적 주소 길이</param>
        /// <returns>처리 결과</returns>
        [DllImport("iphlpapi.dll", ExactSpelling = true)]
        private static extern int SendARP(int destinationIP, int sourceIP, byte[] macAddressByteArray, ref uint physicalAddressLength);

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Field
        ////////////////////////////////////////////////////////////////////////////////////////// Private

        #region Field

        /// <summary>
        /// 스레드
        /// </summary>
        private Thread thread = null;

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region 생성자 - MainForm()

        /// <summary>
        /// 생성자
        /// </summary>
        public MainForm()
        {
            InitializeComponent();
        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Method
        ////////////////////////////////////////////////////////////////////////////////////////// Private
        //////////////////////////////////////////////////////////////////////////////// Event

        #region 폼 닫을 경우 처리하기 - Form_FormClosing(sender, e)

        /// <summary>
        /// 폼 닫을 경우 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void Form_FormClosing(object sender, FormClosingEventArgs e)
        {
            if(this.thread != null)
            {
                this.thread.Abort();
            }
        }

        #endregion
        #region 조회 버튼 클릭시 처리하기 - searchButton_Click(sender, e)

        /// <summary>
        /// 조회 버튼 클릭시 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void searchButton_Click(object sender, EventArgs e)
        {
            this.thread = new Thread(Search);

            this.thread.IsBackground = true;

            this.thread.Start();
        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////// Function

        #region 호스트명 구하기 - GetHostName(ipAddress)

        /// <summary>
        /// 호스트명 구하기
        /// </summary>
        /// <param name="ipAddress">IP 주소</param>
        /// <returns>호스트명</returns>
        private string GetHostName(IPAddress ipAddress)
        {
            try
            {
                IPHostEntry ipHostEntry = Dns.GetHostEntry(ipAddress);

                return ipHostEntry.HostName;
            }
            catch(Exception)
            {
                return ipAddress.ToString();
            }
        }

        #endregion
        #region MAC 주소 구하기 - GetMACAddress(ipAddressString)

        /// <summary>
        /// MAC 주소 구하기
        /// </summary>
        /// <param name="ipAddressString">IP 주소 문자열</param>
        /// <returns>MAC 주소</returns>
        private string GetMACAddress(string ipAddressString)
        {
            IPAddress ipAddress = IPAddress.Parse(ipAddressString);

            byte[] macAddressByteArrat = new byte[6];

            uint macAddressByteArratLength = (uint)macAddressByteArrat.Length;

            if(SendARP((int)ipAddress.Address, 0, macAddressByteArrat, ref macAddressByteArratLength) != 0)
            {
                return "ARP COMMAND FAILED";
            }

            string[] macAddressStringArray = new string[(int)macAddressByteArratLength];

            for(int i = 0; i < macAddressByteArratLength; i++)
            {
                macAddressStringArray[i] = macAddressByteArrat[i].ToString("x2");
            }

            return string.Join(":", macAddressStringArray);
        }

        #endregion

        #region 조회하기 - Search()

        /// <summary>
        /// 조회하기
        /// </summary>
        private void Search()
        {
            try
            {
                this.listView.Items.Clear();

                Application.DoEvents();

                IPAddress startIPAddress   = IPAddress.Parse(this.startIPAddressTextBox.Text);
                IPAddress endIPAddress     = IPAddress.Parse(this.endIPAddressTextBox.Text);
                IPAddress currentIPAddress = null;

                string hostName = null;

                int[] startIPAddressArray = new int[4];
                int[] endIPAddressArray   = new int[4];

                startIPAddressArray[0] = Convert.ToInt32(startIPAddress.GetAddressBytes()[0]);
                startIPAddressArray[1] = Convert.ToInt32(startIPAddress.GetAddressBytes()[1]);
                startIPAddressArray[2] = Convert.ToInt32(startIPAddress.GetAddressBytes()[2]);
                startIPAddressArray[3] = Convert.ToInt32(startIPAddress.GetAddressBytes()[3]);

                endIPAddressArray[0] = Convert.ToInt32(endIPAddress.GetAddressBytes()[0]);
                endIPAddressArray[1] = Convert.ToInt32(endIPAddress.GetAddressBytes()[1]);
                endIPAddressArray[2] = Convert.ToInt32(endIPAddress.GetAddressBytes()[2]);
                endIPAddressArray[3] = Convert.ToInt32(endIPAddress.GetAddressBytes()[3]);

                this.progressBar.Minimum = Convert.ToInt32(startIPAddress.GetAddressBytes()[3]);
                this.progressBar.Maximum = Convert.ToInt32(endIPAddress.GetAddressBytes()[3]);
                this.progressBar.Value   = Convert.ToInt32(startIPAddress.GetAddressBytes()[3]);

                for(int a = startIPAddressArray[0]; a <= endIPAddressArray[0]; a++)
                {
                    for(int b = startIPAddressArray[1]; b <= endIPAddressArray[1]; b++)
                    {
                        for(int c = startIPAddressArray[2]; c <= endIPAddressArray[2]; c++)
                        {
                            for(int d = startIPAddressArray[3]; d <= endIPAddressArray[3]; d++)
                            {
                                this.progressBar.Value = d;

                                currentIPAddress = IPAddress.Parse(a.ToString() + "." + b.ToString() + "." + c.ToString() + "." + d.ToString());

                                Ping        ping        = new Ping();
                                PingOptions pintOptions = new PingOptions();

                                pintOptions.DontFragment = true;

                                string message          = "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa";
                                byte[] messageByteArray = Encoding.ASCII.GetBytes(message);

                                int timeout = 150;

                                PingReply pintReply = ping.Send(currentIPAddress, timeout, messageByteArray, pintOptions);

                                hostName = null;

                                string macAddress = null;

                                if(pintReply.Status == IPStatus.Success)
                                {
                                    hostName   = GetHostName(currentIPAddress);
                                    macAddress = GetMACAddress(currentIPAddress.ToString());

                                    ListViewItem item = new ListViewItem();

                                    item.Text = currentIPAddress.ToString();
                                    item.SubItems.Add(hostName);
                                    item.SubItems.Add(macAddress);

                                    this.listView.Items.Add(item);
                                }

                                if(d == this.progressBar.Maximum)
                                {
                                    MessageBox.Show("네트워크 스캔을 완료하였습니다.", "정보", MessageBoxButtons.OK, MessageBoxIcon.Information);
                                }
                            }
                        }
                    }
                }
            }
            catch(Exception exception)
            {
                MessageBox.Show(exception.Message, "에러", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
            finally
            {
                this.thread.Abort();
            }
        }

        #endregion
    }
}