get mac address in c# from ip address_hostname _ c# & vb .net codes and components

1/4/2014 Get MAC Address in C# from IP Address/Hostname | C# & vb .Net Codes and components...

http://mycomponent.blogspot.com.br/2009/05/get-mac-address-in-c-from-ip.html 1/6

M O N D A Y , M A Y 1 1 , 2 0 0 9

Get MAC Address in C# from IP Address/Hostname

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I was hoping to find something to get MAC address of a machine given its IP address or hostname. There

could be multiple ways to do the same. But I thought I'll give the "nbtstat" a chance. nbtstat is a command in

windows which gets you the details about protocol statistics and current TCP/IP connections using NBT

(NetBIOS over TCP/IP). Here is a small program in C# which does the exact same thing: (If you want just the

exe, let me know via a comment here and I'll send you the executable.)

1 // No copyrights(c). Use as you wish!

2

3 using System;

4 using System.Diagnostics;

5 using System.Net;

6 using System.Net.NetworkInformation;

7 using System.Runtime.InteropServices;

8 using System.Text;

9

10 namespace Yours.Truly

11 {

12 // *************************************************************************

13 ///

14 /// A class to get the MAC address from IP address. The same class can be

15 /// modified a little to get the MAC address from the specified hostname.

16 ///

17 public class GetMacAddressFromIPAddress

18 {

19 /// Ping timeout (in ms)

20 private const int PING_TIMEOUT = 1000;

21

22 // *********************************************************************

23 ///

24 /// Initializes a new instance of .

25 ///

26 public GetMacAddressFromIPAddress()

27 {

28 }

29

30 // *********************************************************************

31 ///

32 /// Gets the MAC address from specified

33 /// using nbtstat in hyphen (-) separated format.

34 ///

35 ///

36 ///

37 /// The same class can be modified to accept hostname and then resolve

38 /// the hostname to Ip address to get the MAC address or just pass "-a"

39 /// argument to "nbtstat" to get the mac address from hostname. If you

40 /// want to find the MAC address from only the IP address change the

41 /// switch to "-A".

42 ///

43 ///

44 /// The current program can resolve both hostname as well as IP address

45 /// to MAC address. The "-a" argument can actually accept both IP address

46 /// as well as hostname.

47 ///

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48 ///

49 /// The IP address or hostname for the machine

50 /// for which the MAC address is desired.

51 /// A string containing the MAC address if MAC address could be

52 /// found.An empty or null string otherwise.

53 private string GetMacAddress(string ipAddress)

54 {

55 string macAddress = string.Empty;

56

57 if (!IsHostAccessible(ipAddress)) return null;

58 try

59 {

60 ProcessStartInfo processStartInfo = new ProcessStartInfo();

61 Process process = new Process();

62 processStartInfo.FileName = "nbtstat";

63 processStartInfo.RedirectStandardInput = false;

64 processStartInfo.RedirectStandardOutput = true;

65 processStartInfo.Arguments = "-a " + ipAddress;

66 processStartInfo.UseShellExecute = false;

67 process = Process.Start(processStartInfo);

68

69 int Counter = -1;

70

71 while (Counter -1)

92 {

93 break;

94 }

95 macAddress = process.StandardOutput.ReadLine();

96 }

97 process.WaitForExit();

98 macAddress = macAddress.Trim();

99 }

100 catch (Exception e)

101 {

102 // Something unexpected happened? Inform the user

103 // The possibilities are:

104 // 1.That the machine is not on the network currently

105 // 2. The IP address/hostname supplied are not on the same network

106 // 3. The host was not found on the same subnet or could not be

107 // resolved

108 Console.WriteLine("Failed because:" + e.ToString());

109 }

110

111 return macAddress;

112 }



113

114 #region Getting MAC from ARP

115

116 [DllImport("iphlpapi.dll", ExactSpelling = true)]

117 static extern int SendARP(int DestIP, int SrcIP, byte[] pMacAddr,

118 ref uint PhyAddrLen);

119

120 // *********************************************************************

121 ///

122 /// Gets the MAC address from ARP table in colon (:) separated format.

123 ///

124 /// Host name or IP address of the

125 /// remote host for which MAC address is desired.

126 /// A string containing MAC address; null if MAC address could

127 /// not be found.

128 private string GetMACAddressFromARP(string hostNameOrAddress)

129 {

130 if (!IsHostAccessible(hostNameOrAddress)) return null;

131

132 IPHostEntry hostEntry = Dns.GetHostEntry(hostNameOrAddress);

133 if (hostEntry.AddressList.Length == 0)

134 return null;

135

136 byte[] macAddr = new byte[6];

137 uint macAddrLen = (uint) macAddr.Length;

138 if (SendARP((int) hostEntry.AddressList[0].Address, 0, macAddr,

139 ref macAddrLen) != 0)

140 return null;

141

142 StringBuilder macAddressString = new StringBuilder();

143 for (int i = 0; i < macAddr.Length; i++)

144 {

145 if (macAddressString.Length > 0)

146 macAddressString.Append(":");

147

148 macAddressString.AppendFormat("{0:x2}", macAddr[i]);

149 }

150

151 return macAddressString.ToString();

152 } // end GetMACAddressFromARP

153

154 #endregion Getting MAC from ARP

155

156 // *********************************************************************

157 ///

158 /// Checks to see if the host specified by

159 /// is currently accessible.

160 ///

161 /// Host name or IP address of the

162 /// remote host for which MAC address is desired.

163 /// if the host is currently accessible;

164 /// otherwise.

165 private static bool IsHostAccessible(string hostNameOrAddress)

166 {

167 Ping ping = new Ping();

168 PingReply reply = ping.Send(hostNameOrAddress, PING_TIMEOUT);

169 return reply.Status == IPStatus.Success;

170 }

171

172 // *********************************************************************

173 ///

174 /// The netry point for the application.

175 ///

176 /// An array of command line arguments.

177 [STAThread]



178 static void Main(string[] args)

179 {

180 bool macRequired = true;

181 while (macRequired)

182 {

183 Console.WriteLine("Enter the IP address for which mac address is " +

184 "required:(Enter exit to quit the program.)");

185 string ipAddress = Console.ReadLine();

186 StringComparer cp = StringComparer.OrdinalIgnoreCase;

187 if (cp.Compare(ipAddress, "Exit") == 0) break;

188

189 GetMacAddressFromIPAddress getMacAddress =

190 new GetMacAddressFromIPAddress();

191

192 Console.WriteLine("Please wait while I try to find the MAC

address...");

193 // You may also use the ARP table. Call GetMACAddressFromARP here

194 string MacAddress = getMacAddress.GetMacAddress(ipAddress);

195

196 Console.WriteLine(MacAddress);

197 } // end while

198 }

199

200 } // end class GetMacAddressFromIPAddress

201

202 } // end namespace Yours.Truly

POSTED BY YOURS TRULY . . .

LABELS: .NET, C#, V B .NET

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1 9 C O M M E N T S :

Replies

Jacques August 17, 2009 at 12:41 PM

Very good post...so simple yet exactly what I needed.

Reply

Anonymous August 4, 2010 at 6:37 AM

Thank you, it is a very interesting post.

Anyway i wish you used pure C# code for netbios, without using the external OS tool.

Bye.

Reply

Anonymous January 21, 2011 at 8:47 AM

I don't know if you have tried this in Windows 7, but it won't work for some reason. I keep getting a

Win32Exception more or less telling me that it cannot find nbtstat even though it's in the Path and I

know it's there.

Reply

Ryan Nalls January 23, 2013 at 7:31 AM

add this line above line 60:

string filePath = Environment.GetFolderPath(Environment.SpecialFolder.Windows) +

"\\sysnative";

then modify the call like this:

62 processStartInfo.FileName = filePath + "\\nbtstat.exe";



Reply

Replies

Reply

hemanth July 24, 2011 at 8:46 PM

Hey nice post. Please send me exe file .

My email :[email protected]

Reply

Anonymous October 5, 2011 at 2:53 AM

Please send me this *.exe I need desperately for a project I'm working on where I really want to

avoid having to Hostname>IP>Mac if I can go Hostname>Mac will save me days of work. thanks.

[email protected]

Reply

Computer Killer March 14, 2012 at 4:50 AM

I want To Implement Of Windows Form

Reply

Computer Killer March 16, 2012 at 12:33 AM

[email protected]

Naveed April 26, 2012 at 3:33 AM

can i get the .exe file please send me

Reply

Naveed April 26, 2012 at 3:37 AM

at this email address "[email protected]"

Reply

Anonymous April 26, 2012 at 9:15 PM

I need this project too... please, send me "[email protected]". Thx!

Reply

Anonymous November 21, 2012 at 3:04 AM

at this email address please send the project "[email protected]"

Reply

Anonymous February 18, 2013 at 10:41 PM

Please send me at [email protected]

Reply

Anonymous February 27, 2013 at 1:37 AM

please send me @ [email protected]

Reply

Anonymous March 4, 2013 at 4:12 PM

Horrid ... using output from a command line to do something like this... what if the output changes



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with the next release of windows? ... anyway a much better way of doing this is here:

http://stackoverflow.com/questions/1148778/how-do-i-access-arp-protocol-information-through-

net have a look at the bit where it says: This is an example of the GetIpNetTable

Kris

Reply

Anonymous April 9, 2013 at 1:04 AM

Please send me this project and executable file as well to [email protected]. thanks.

Reply

Silvester Norman July 16, 2013 at 2:13 AM

Oh My God !

Such a complex code to find the mac address of network adapter. Not even the technical person

would like this complex code.

Thanks

Silvester Norman

Change Mac Address

Reply

jhay ar delos reyes September 30, 2013 at 5:00 PM

great job master .. can i have the exe ? please email me [email protected]

Reply

ahmet March 24, 2014 at 2:55 AM

Windows 8 ?

Reply

get mac address in c# from ip address_hostname _ c# & vb .net codes and components

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