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HostName, IP, and MAC Address

, 23 Jan 2005
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This will guide you to understand and trace network host information, IP, and MAC address information.

Sample Image - Host_Info_within_Network.jpg

Introduction

This article is used to get the intranet information in a network. It shows information like the host name, corresponding IP address and also physical address.

Using the code

The code retrieves all the System names using the Directory entries information.

//       // Use Your work Group WinNT://Baba(Work Group Name)
//     DirectoryEntry DomainEntry = 
//         new DirectoryEntry("WinNT://" + this.TxtWorkGroup.Text.Trim());
//     DomainEntry.Children.SchemaFilter.Add("computer");

Then we collect the IP address using the DNS.

//    System.Net.IPHostEntry Tempaddr = 
 //     (System.Net.IPHostEntry)Dns.GetHostByName(machine.Name);
//    System.Net.IPAddress[] TempAd = Tempaddr.AddressList;

The physical MAC address is collected using the DLL "iphlpapi.dll" with the API SendARP().

For each System, we use the Hostname to retrieve the MAC address.

//    [DllImport("iphlpapi.dll", ExactSpelling=true)]
//    public static extern int SendARP( int DestIP, int SrcIP, 
//         [Out] byte[] pMacAddr, ref int PhyAddrLen );

Points of Interest

This is my first article in CodeProject.

History

  • 01/24/2005

    Article released.

License

This article has no explicit license attached to it but may contain usage terms in the article text or the download files themselves. If in doubt please contact the author via the discussion board below.

A list of licenses authors might use can be found here

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About the Author

MahendranG
Technical Lead
India India
I loves computers. I am interested in programming such like Networking using Sockets, Imaging, Telecom and robotics.
 
I am very much interested in programming in windows and Linux.
 
I am working with Verizon Data Services India Ltd.,

Comments and Discussions

 
QuestionGet IP Address from HostName Pinmemberjohneloka19-Mar-14 23:20 
QuestionWorks only when connected to network using WIFI but doesn't work when connected via wires PinmemberMember 1049386314-Mar-14 17:00 
GeneralThis code does not work on Windows 7.Please help. Pinmemberrohini.vangury1-Nov-10 2:17 
GeneralTo get the User Name of the client accessing a website PinmemberMoiz Ahmed8-Jan-10 23:28 
GeneralGreat article PinmemberEaverae2-Oct-09 0:58 
GeneralError when running your util HostNIPAddr.exe Pinmembersmith6667-Oct-08 8:06 
QuestionHow to Get WorkGroupNames in LAN PinmemberGowri12345613-Jun-08 1:25 
Generalworkgroup n ames in lan Pinmemberthiruvadi_anand31-Mar-08 1:58 
Hi!
 

In my application i used this code to find all systems connected in LAN.But it return some systems only. this is the code
 
Dim childEntry As DirectoryEntry
Dim ParentEntry As New DirectoryEntry()
Try
ParentEntry.Path = "WinNT:"
For Each childEntry In ParentEntry.Children
Dim newNode As New TreeNode(childEntry.Name)
Select Case childEntry.SchemaClassName
Case "Domain"
Dim ParentDomain As New TreeNode(childEntry.Name)
TreeView1.Nodes.AddRange(New TreeNode() {ParentDomain})
Dim SubChildEntry As DirectoryEntry
Dim SubParentEntry As New DirectoryEntry()
SubParentEntry.Path = "WinNT://" & childEntry.Name
For Each SubChildEntry In SubParentEntry.Children
Dim newNode1 As New TreeNode(SubChildEntry.Name)
Select Case SubChildEntry.SchemaClassName
Case "Computer"
ParentDomain.Nodes.Add(newNode1)
End Select
Next
End Select
Next
Catch Excep As Exception
MsgBox("Error While Reading Directories")
Finally
ParentEntry = Nothing
End Try
 
In that the
SubChildEntry.SchemaClassName its return value like "Schema" instead of "Computers".For this i'm not able to list out all systems in my LAN.
 
Can you give solution for this .plz
 
Regards,
Anand.M
Questionno working in other range IP Pinmemberpablohack4-Sep-07 23:23 
GeneralUsage of variable names. PinmemberDesotron17-May-07 6:34 
GeneralHelp me! Pinmembernguyenquanglamcnttk277-May-07 23:57 
QuestionIs there a way to detect Network Printers' IP addresses? PinmemberJan Palmer25-Dec-06 23:55 
QuestionMAC address of Linux, Solaris... machine? Pinmemberhnim20-Dec-06 20:46 
AnswerRe: MAC address of Linux, Solaris... machine? PinmemberMahendranG21-Dec-06 6:54 
GeneralRe: MAC address of Linux, Solaris... machine? Pinmemberhnim25-Dec-06 20:35 
GeneralRe: MAC address of Linux, Solaris... machine? PinmemberMahendranG26-Dec-06 6:53 
QuestionHow to get the MAC from NIC Hardware PinmemberReader Man San31-Oct-06 20:51 
GeneralHostname from IP Address PinmemberDaLucifer30-Jun-06 23:03 
GeneralRe: Hostname from IP Address PinmemberMahendranG25-Jul-06 17:57 
GeneralRe: Hostname from IP Address PinmemberDaLucifer26-Jul-06 5:07 
QuestionHow to Get MAC Address from an IP Address in Internet Pinmemberdathq22-May-06 7:02 
AnswerRe: How to Get MAC Address from an IP Address in Internet Pinmemberdarkhuntercode28-Jan-11 9:25 
GeneralMAC Address of PC;s turned off... PinmemberKevinReece19-Apr-06 4:34 
GeneralRe: MAC Address of PC;s turned off... PinmemberMahendranG19-Apr-06 18:48 
GeneralVB.NET 2005 Example PinmemberFloatingPointCode6-Apr-06 4:43 

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