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;

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

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
    }
}

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

209

210

211

212

213

214

215

216

217

218

219

220

221

222

223

224

225

226

227

228

229

230

231

232

233

234

235

236

237

238

239

240

241

242

243

244

245

246

247

248

249

250

251

252

253

254

255

256

257

258

259

260

261

262

263

264

265

266

267

268

269

270

271

272

273

274

275

276

277

278

279

280

281

282

283

284

285

286

287

288

289

290

291

292

293

294

295

296

297

298

299

300

301

302

303

304

305

306

307

308

309

310

311

312

313

314

315

316

317

318

319

320

321

322

323

324

325

326

327

328

329

330

331

332

333

334

335

336

337

338

339

340

341

342

343

344

345

346

347

348

349

350

351

352

353

354

355

356

357

358

359

360

361

362

363

364

365

366

367

368

369

370

371

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);

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; }

}

Screenshots:

NuGet Packages:

Newtonsoft.json

Unsupported devices:

Netgear wifi extender n300, etc…

Similar Apps:

Contact:

ACodigo

C# (3) – Network Watcher

– Good luck –

Open source code & tutorials