C# (3) – Network Watcher

Downloads:

Features:

Show all connected devices to your network
Get devices MAC address info (Host name, Manufacturer, etc.. )

Note:

This program gets MAC info from ( https://macvendors.com/ )

C# Source Code:

Main.cs

using System;
using System.Windows.Forms;
using System.Diagnostics;
using System.Management;
using System.Net;
using System.Net.NetworkInformation;
using System.Threading;
using System.Runtime.InteropServices;
using System.Text.RegularExpressions;
using System.Net.Http;
using System.Net.Sockets;
using Newtonsoft.Json;

namespace Network_Watcher
{
    public partial class Main : Form
    {
        #region Network Tools
        [DllImport("wininet.dll")]  // Connection Status
        private extern static bool InternetGetConnectedState(out int Description, int ReservedValue); // Connection Status

        System.Windows.Forms.Timer t = new System.Windows.Forms.Timer();

        Thread myThread = null; // IP Checking

        public string IP; // For MAC Address
        public string IP2; // For MAC Address in Router Connections

        public string Di = "";
        public string mn = "";
        #endregion

        public Main()
        {
            InitializeComponent();
        }

        private void Main_Load(object sender, EventArgs e) { }

        #region Router Connections

        #region voids
        public void scan(string subnet)
        {
            Ping myPing;
            PingReply reply;
            IPAddress addr;
            IPHostEntry host;

            progressBar.Maximum = 255;
            progressBar.Value = 0;
            listView1.Items.Clear();

            for (int i = 1; i <= 255; i++)   // 255
            {
                try
                {
                    string subnetn = "." + i.ToString();
                    myPing = new Ping();
                    reply = myPing.Send(subnet + subnetn, 900);
                    txtScanIp.Text = "Scanning : " + subnet + subnetn;

                    if (reply.Status == IPStatus.Success)
                    {
                        try
                        {
                            addr = IPAddress.Parse(subnet + subnetn);
                            host = Dns.GetHostEntry(addr);
                            IP2 = Convert.ToString(addr);

                            #region 192.168.1.1 & Clients
                            try
                            {
                                if (subnet + subnetn == "192.168.1.1")
                                {
                                    Di = "Router";
                                }
                            }
                            catch { Di = ""; }

                            if (Di == "")
                            {
                                Di = "Client";
                            }
                            #endregion

                            #region Manufacturer
                            if (radioButtonSpeed.Checked == true)
                            {
                                mn = "";
                            }
                            if (radioButtonSlow.Checked == true)
                            {
                                int Desc;    /// Connection Status
                                if (InternetGetConnectedState(out Desc, 0) == true)
                                {
                                    try
                                    {
                                        WebClient client = new WebClient();
                                        mn = client.DownloadString("http://api.macvendors.com/" + GetMacAddress(subnet + subnetn));
                                    }
                                    catch { mn = ""; }
                                }
                                else
                                {
                                    mn = "No Internet !";
                                }
                            }
                            #endregion

                            listView1.Items.Add(new ListViewItem(new String[] { subnet + subnetn, host.HostName, GetMacAddress(subnet + subnetn), "Up", Di, mn }));
                            Di = "";
                        }
                        catch { }
                    }
                    progressBar.Value += 1;
                }
                catch { }
            }

            int count = listView1.Items.Count;

            txtLocalIp.Enabled = true;
            txtLocalIp.Show();

            btnScan.Enabled = true;
            btnStop.Enabled = false;

            progressBar.Hide();

            txtScanIp.Text = "Finished !";
            txtCounter.Text = "Scanning Done ! Found :  " + count.ToString() + "  Hosts.";

            groupBox6.Enabled = true;

            myThread.Abort();
        }

        public void query(string host)
        {
            string temp = null;
            string[] _searchClass = { "Win32_ComputerSystem", "Win32_OperatingSystem", "Win32_BaseBoard", "Win32_BIOS" };
            string[] param = { "UserName", "Caption", "Product", "Description" };

            for (int i = 0; i <= _searchClass.Length - 1; i++)
            {
                txtScanIp.Text = "Getting information ...";
                try
                {
                    ManagementObjectSearcher searcher = new ManagementObjectSearcher("\\\\" + host + "\\root\\CIMV2", "SELECT *FROM " + _searchClass[i]);
                    foreach (ManagementObject obj in searcher.Get())
                    {
                        txtScanIp.Text = "Getting information ...";

                        temp += obj.GetPropertyValue(param[i]).ToString() + "\n";
                        if (i == _searchClass.Length - 1)
                        {
                            txtScanIp.Text = "Done !";
                            MessageBox.Show(temp, "Hostinfo : " + host, MessageBoxButtons.OK, MessageBoxIcon.Information);
                            break;
                        }
                        txtScanIp.Text = "Getting information ...";
                    }
                }
                catch
                {
                    MessageBox.Show("Cannot retrieve host info for security reasons !", "Hostinfo : " + host, MessageBoxButtons.OK, MessageBoxIcon.Information);
                    break;
                }
            }
        }
        #endregion

        // Search
        private void btnScan_Click(object sender, EventArgs e)
        {
            progressBar.Show();

            if (txtLocalIp.Text == string.Empty)
            {
                MessageBox.Show("No IP address entered !", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
            else
            {
                txtLocalIp.Hide();

                btnScan.Enabled = false;
                myThread = new Thread(() => scan(txtLocalIp.Text));
                myThread.Start();

                if (myThread.IsAlive == true)
                {
                    btnStop.Enabled = true;
                    txtLocalIp.Enabled = false;
                    groupBox6.Enabled = false;
                }
            }
        }
        // Stop
        private void btnStop_Click(object sender, EventArgs e)
        {
            try
            {
                myThread.Abort();

                btnScan.Enabled = true;
                btnStop.Enabled = false;

                txtLocalIp.Show();
                txtLocalIp.Enabled = true;

                groupBox6.Enabled = true;

                progressBar.Hide();

                txtCounter.Text = "Stoped !!!";
            }
            catch { }
        }
        // List View
        private void listView1_MouseClick(object sender, MouseEventArgs e)
        {
            ListView listView = sender as ListView;
            if (e.Button == System.Windows.Forms.MouseButtons.Right)
            {
                ListViewItem item = listView.GetItemAt(e.X, e.Y);
                if (item != null)
                {
                    item.Selected = true;
                    contextMenuStrip1.Show(listView, e.Location);
                }
            }
        }
        // Tool Strip Menu
        private async void showMacInfoToolStripMenuItem_Click(object sender, EventArgs e)
        {
            int Desc;    /// Connection Status
            if (InternetGetConnectedState(out Desc, 0) == true)
            {
                try
                {
                    string mac = listView1.SelectedItems[0].SubItems[2].Text.ToString();
                    HttpClient client = new HttpClient();
                    string url = "http://macvendors.co/api/" + mac;
                    var response = await client.GetAsync(string.Format(url));
                    string result = await response.Content.ReadAsStringAsync();
                    MACinfo.RootObject root = JsonConvert.DeserializeObject<MACinfo.RootObject>(result);

                    string info = "Countyr : " + root.result.country + "\nCompany : " + root.result.company + "\nAddress : " + root.result.address + "\nMac Prefix : " + root.result.mac_prefix + "\nStart Hex : " + root.result.start_hex + "\nEnd Hex : " + root.result.end_hex + "\nType : " + root.result.type;

                    MessageBox.Show(info, "Info", MessageBoxButtons.OK, MessageBoxIcon.Information);
                }
                catch
                {
                    MessageBox.Show("Server Error !", "Info", MessageBoxButtons.OK, MessageBoxIcon.Information);
                }
            }
            else
            {
                MessageBox.Show("Require Internet connection !", "Attention", MessageBoxButtons.OK, MessageBoxIcon.Information);
            }
        }
        #endregion

        #region Get MAC Address & External IP
        public string getExternalIp()
        {
            try
            {
                string externalIP;
                externalIP = (new WebClient()).DownloadString("http://ipinfo.io/");
                externalIP = (new Regex(@"\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}"))
                             .Matches(externalIP)[0].ToString();
                return externalIP;
            }
            catch { return null; }
        }

        public string GetMacAddress()
        {
            foreach (NetworkInterface NetI in NetworkInterface.GetAllNetworkInterfaces())
            {
                if (NetI.NetworkInterfaceType == NetworkInterfaceType.Wireless80211 ||
                    NetI.NetworkInterfaceType == NetworkInterfaceType.Ethernet &&
                    NetI.OperationalStatus == OperationalStatus.Up)
                {
                    bool found = false;

                    foreach (UnicastIPAddressInformation UniIpAddrInfo in NetI.GetIPProperties().UnicastAddresses)
                    {
                        if (UniIpAddrInfo.Address.AddressFamily != AddressFamily.InterNetwork ||
                            UniIpAddrInfo.AddressPreferredLifetime == UInt32.MaxValue)
                            continue;

                        found = (UniIpAddrInfo.Address.ToString() == IP);
                    }

                    if (found)
                    {
                        string macAddr = NetI.GetPhysicalAddress().ToString();
                        return (macAddr.Length != 12) ? "00:00:00:00:00:00"
                            : Regex.Replace(macAddr, "(.{2})(.{2})(.{2})(.{2})(.{2})(.{2})", "$1:$2:$3:$4:$5:$6");
                    }
                }
            }
            return "Unknown";
        }

        public string GetMacAddress2()
        {
            foreach (NetworkInterface NetI in NetworkInterface.GetAllNetworkInterfaces())
            {
                if (NetI.NetworkInterfaceType == NetworkInterfaceType.Wireless80211 ||
                    NetI.NetworkInterfaceType == NetworkInterfaceType.Ethernet &&
                    NetI.OperationalStatus == OperationalStatus.Up)
                {
                    bool found = false;

                    foreach (UnicastIPAddressInformation UniIpAddrInfo in NetI.GetIPProperties().UnicastAddresses)
                    {
                        if (UniIpAddrInfo.Address.AddressFamily != AddressFamily.InterNetwork ||
                            UniIpAddrInfo.AddressPreferredLifetime == UInt32.MaxValue)
                            continue;

                        found = (UniIpAddrInfo.Address.ToString() == IP2);
                    }

                    if (found)
                    {
                        string macAddr = NetI.GetPhysicalAddress().ToString();
                        return (macAddr.Length != 12) ? "00:00:00:00:00:00"
                            : Regex.Replace(macAddr, "(.{2})(.{2})(.{2})(.{2})(.{2})(.{2})", "$1:$2:$3:$4:$5:$6");
                    }
                }
            }
            return "Unknown";
        }

        public string GetMacAddress(string ipAddress) // For Clients
        {
            string macAddress = string.Empty;
            System.Diagnostics.Process Process = new System.Diagnostics.Process();
            Process.StartInfo.FileName = "arp";
            Process.StartInfo.Arguments = "-a " + ipAddress;
            Process.StartInfo.UseShellExecute = false;
            Process.StartInfo.RedirectStandardOutput = true;
            Process.StartInfo.CreateNoWindow = true;
            Process.Start();
            string strOutput = Process.StandardOutput.ReadToEnd();
            string[] substrings = strOutput.Split('-');
            if (substrings.Length >= 8)
            {
                macAddress = substrings[3].Substring(Math.Max(0, substrings[3].Length - 2))
                         + substrings[4] + substrings[5] + substrings[6]
                         + substrings[7]
                         + substrings[8].Substring(0, 2);
                string macAddr = macAddress.ToString();

                return (macAddr.Length != 12) ? "00:00:00:00:00:00"
                    : Regex.Replace(macAddr, "(.{2})(.{2})(.{2})(.{2})(.{2})(.{2})", "$1:$2:$3:$4:$5:$6").ToUpper(); // ToUpper() / To make mac address in capital letters
                return macAddr;
            }
            else
            {
                Di = "This Computer";
                return GetMacAddress2();
            }
        }
        #endregion
    }
}

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using System;

using System.Windows.Forms;

using System.Diagnostics;

using System.Management;

using System.Net;

using System.Net.NetworkInformation;

using System.Threading;

using System.Runtime.InteropServices;

using System.Text.RegularExpressions;

using System.Net.Http;

using System.Net.Sockets;

using Newtonsoft.Json;

namespace Network_Watcher

{

public partial class Main : Form

{

#region Network Tools

[DllImport("wininet.dll")] // Connection Status

private extern static bool InternetGetConnectedState(out int Description, int ReservedValue); // Connection Status

System.Windows.Forms.Timer t = new System.Windows.Forms.Timer();

Thread myThread = null; // IP Checking

public string IP; // For MAC Address

public string IP2; // For MAC Address in Router Connections

public string Di = "";

public string mn = "";

#endregion

public Main()

{

InitializeComponent();

}

private void Main_Load(object sender, EventArgs e) { }

#region Router Connections

#region voids

public void scan(string subnet)

{

Ping myPing;

PingReply reply;

IPAddress addr;

IPHostEntry host;

progressBar.Maximum = 255;

progressBar.Value = 0;

listView1.Items.Clear();

for (int i = 1; i <= 255; i++) // 255

{

try

{

string subnetn = "." + i.ToString();

myPing = new Ping();

reply = myPing.Send(subnet + subnetn, 900);

txtScanIp.Text = "Scanning : " + subnet + subnetn;

if (reply.Status == IPStatus.Success)

{

try

{

addr = IPAddress.Parse(subnet + subnetn);

host = Dns.GetHostEntry(addr);

IP2 = Convert.ToString(addr);

#region 192.168.1.1 & Clients

try

{

if (subnet + subnetn == "192.168.1.1")

{

Di = "Router";

}

catch { Di = ""; }

if (Di == "")

{

Di = "Client";

}

#endregion

#region Manufacturer

if (radioButtonSpeed.Checked == true)

{

mn = "";

}

if (radioButtonSlow.Checked == true)

{

int Desc; /// Connection Status

if (InternetGetConnectedState(out Desc, 0) == true)

{

try

{

WebClient client = new WebClient();

mn = client.DownloadString("http://api.macvendors.com/" + GetMacAddress(subnet + subnetn));

}

catch { mn = ""; }

}

else

{

mn = "No Internet !";

}

#endregion

listView1.Items.Add(new ListViewItem(new String[] { subnet + subnetn, host.HostName, GetMacAddress(subnet + subnetn), "Up", Di, mn }));

Di = "";

}

catch { }

}

progressBar.Value += 1;

}

catch { }

}

int count = listView1.Items.Count;

txtLocalIp.Enabled = true;

txtLocalIp.Show();

btnScan.Enabled = true;

btnStop.Enabled = false;

progressBar.Hide();

txtScanIp.Text = "Finished !";

txtCounter.Text = "Scanning Done ! Found : " + count.ToString() + " Hosts.";

groupBox6.Enabled = true;

myThread.Abort();

}

public void query(string host)

{

string temp = null;

string[] _searchClass = { "Win32_ComputerSystem", "Win32_OperatingSystem", "Win32_BaseBoard", "Win32_BIOS" };

string[] param = { "UserName", "Caption", "Product", "Description" };

for (int i = 0; i <= _searchClass.Length - 1; i++)

{

txtScanIp.Text = "Getting information ...";

try

{

ManagementObjectSearcher searcher = new ManagementObjectSearcher("\\\\" + host + "\\root\\CIMV2", "SELECT *FROM " + _searchClass[i]);

foreach (ManagementObject obj in searcher.Get())

{

txtScanIp.Text = "Getting information ...";

temp += obj.GetPropertyValue(param[i]).ToString() + "\n";

if (i == _searchClass.Length - 1)

{

txtScanIp.Text = "Done !";

MessageBox.Show(temp, "Hostinfo : " + host, MessageBoxButtons.OK, MessageBoxIcon.Information);

break;

}

txtScanIp.Text = "Getting information ...";

}

catch

{

MessageBox.Show("Cannot retrieve host info for security reasons !", "Hostinfo : " + host, MessageBoxButtons.OK, MessageBoxIcon.Information);

break;

}

#endregion

// Search

private void btnScan_Click(object sender, EventArgs e)

{

progressBar.Show();

if (txtLocalIp.Text == string.Empty)

{

MessageBox.Show("No IP address entered !", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);

}

else

{

txtLocalIp.Hide();

btnScan.Enabled = false;

myThread = new Thread(() => scan(txtLocalIp.Text));

myThread.Start();

if (myThread.IsAlive == true)

{

btnStop.Enabled = true;

txtLocalIp.Enabled = false;

groupBox6.Enabled = false;

}

// Stop

private void btnStop_Click(object sender, EventArgs e)

{

try

{

myThread.Abort();

btnScan.Enabled = true;

btnStop.Enabled = false;

txtLocalIp.Show();

txtLocalIp.Enabled = true;

groupBox6.Enabled = true;

progressBar.Hide();

txtCounter.Text = "Stoped !!!";

}

catch { }

}

// List View

private void listView1_MouseClick(object sender, MouseEventArgs e)

{

ListView listView = sender as ListView;

if (e.Button == System.Windows.Forms.MouseButtons.Right)

{

ListViewItem item = listView.GetItemAt(e.X, e.Y);

if (item != null)

{

item.Selected = true;

contextMenuStrip1.Show(listView, e.Location);

}

// Tool Strip Menu

private async void showMacInfoToolStripMenuItem_Click(object sender, EventArgs e)

{

int Desc; /// Connection Status

if (InternetGetConnectedState(out Desc, 0) == true)

{

try

{

string mac = listView1.SelectedItems[0].SubItems[2].Text.ToString();

HttpClient client = new HttpClient();

string url = "http://macvendors.co/api/" + mac;

var response = await client.GetAsync(string.Format(url));

string result = await response.Content.ReadAsStringAsync();

MACinfo.RootObject root = JsonConvert.DeserializeObject<MACinfo.RootObject>(result);

string info = "Countyr : " + root.result.country + "\nCompany : " + root.result.company + "\nAddress : " + root.result.address + "\nMac Prefix : " + root.result.mac_prefix + "\nStart Hex : " + root.result.start_hex + "\nEnd Hex : " + root.result.end_hex + "\nType : " + root.result.type;

MessageBox.Show(info, "Info", MessageBoxButtons.OK, MessageBoxIcon.Information);

}

catch

{

MessageBox.Show("Server Error !", "Info", MessageBoxButtons.OK, MessageBoxIcon.Information);

}

else

{

MessageBox.Show("Require Internet connection !", "Attention", MessageBoxButtons.OK, MessageBoxIcon.Information);

}

#endregion

#region Get MAC Address & External IP

public string getExternalIp()

{

try

{

string externalIP;

externalIP = (new WebClient()).DownloadString("http://ipinfo.io/");

externalIP = (new Regex(@"\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}"))

.Matches(externalIP)[0].ToString();

return externalIP;

}

catch { return null; }

}

public string GetMacAddress()

{

foreach (NetworkInterface NetI in NetworkInterface.GetAllNetworkInterfaces())

{

if (NetI.NetworkInterfaceType == NetworkInterfaceType.Wireless80211 ||

NetI.NetworkInterfaceType == NetworkInterfaceType.Ethernet &&

NetI.OperationalStatus == OperationalStatus.Up)

{

bool found = false;

foreach (UnicastIPAddressInformation UniIpAddrInfo in NetI.GetIPProperties().UnicastAddresses)

{

if (UniIpAddrInfo.Address.AddressFamily != AddressFamily.InterNetwork ||

UniIpAddrInfo.AddressPreferredLifetime == UInt32.MaxValue)

continue;

found = (UniIpAddrInfo.Address.ToString() == IP);

}

if (found)

{

string macAddr = NetI.GetPhysicalAddress().ToString();

return (macAddr.Length != 12) ? "00:00:00:00:00:00"

: Regex.Replace(macAddr, "(.{2})(.{2})(.{2})(.{2})(.{2})(.{2})", "$1:$2:$3:$4:$5:$6");

}

return "Unknown";

}

public string GetMacAddress2()

{

foreach (NetworkInterface NetI in NetworkInterface.GetAllNetworkInterfaces())

{

if (NetI.NetworkInterfaceType == NetworkInterfaceType.Wireless80211 ||

NetI.NetworkInterfaceType == NetworkInterfaceType.Ethernet &&

NetI.OperationalStatus == OperationalStatus.Up)

{

bool found = false;

foreach (UnicastIPAddressInformation UniIpAddrInfo in NetI.GetIPProperties().UnicastAddresses)

{

if (UniIpAddrInfo.Address.AddressFamily != AddressFamily.InterNetwork ||

UniIpAddrInfo.AddressPreferredLifetime == UInt32.MaxValue)

continue;

found = (UniIpAddrInfo.Address.ToString() == IP2);

}

if (found)

{

string macAddr = NetI.GetPhysicalAddress().ToString();

return (macAddr.Length != 12) ? "00:00:00:00:00:00"

: Regex.Replace(macAddr, "(.{2})(.{2})(.{2})(.{2})(.{2})(.{2})", "$1:$2:$3:$4:$5:$6");

}

return "Unknown";

}

public string GetMacAddress(string ipAddress) // For Clients

{

string macAddress = string.Empty;

System.Diagnostics.Process Process = new System.Diagnostics.Process();

Process.StartInfo.FileName = "arp";

Process.StartInfo.Arguments = "-a " + ipAddress;

Process.StartInfo.UseShellExecute = false;

Process.StartInfo.RedirectStandardOutput = true;

Process.StartInfo.CreateNoWindow = true;

Process.Start();

string strOutput = Process.StandardOutput.ReadToEnd();

string[] substrings = strOutput.Split('-');

if (substrings.Length >= 8)

{

macAddress = substrings[3].Substring(Math.Max(0, substrings[3].Length - 2))

+ substrings[4] + substrings[5] + substrings[6]

+ substrings[7]

+ substrings[8].Substring(0, 2);

string macAddr = macAddress.ToString();

return (macAddr.Length != 12) ? "00:00:00:00:00:00"

: Regex.Replace(macAddr, "(.{2})(.{2})(.{2})(.{2})(.{2})(.{2})", "$1:$2:$3:$4:$5:$6").ToUpper(); // ToUpper() / To make mac address in capital letters

return macAddr;

}

else

{

Di = "This Computer";

return GetMacAddress2();

}

#endregion

}

MACinfo.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Network_Watcher
{
    class MACinfo
    {
        public class Result
        {
            public string company { get; set; }
            public string mac_prefix { get; set; }
            public string address { get; set; }
            public string start_hex { get; set; }
            public string end_hex { get; set; }
            public string country { get; set; }
            public string type { get; set; }
            public string error { get; set; }
        }

        public class RootObject
        {
            public Result result { get; set; }
        }
    }
}

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

namespace Network_Watcher

{

class MACinfo

{

public class Result

{

public string company { get; set; }

public string mac_prefix { get; set; }

public string address { get; set; }

public string start_hex { get; set; }

public string end_hex { get; set; }

public string country { get; set; }

public string type { get; set; }

public string error { get; set; }

}

public class RootObject

{

public Result result { get; set; }

}

Screenshots:

NuGet Packages:

Newtonsoft.json

Unsupported devices:

Netgear wifi extender n300, etc…

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C# (3) – Network Watcher

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