[RESOLVED] Get mac address of gateway

[Crash893]

I'm trying to figure out how to view the default gatways ip address and then get the mac address from that

Any ideas on how to see what the computers defualt gateway is?

[Negative0]

The gateway is defined on a per network card level, so this code will get you the Gateway for each of the NICs installed on a machine:

        Dim sb As New StringBuilder
        sb.AppendLine()
        For Each n As NetworkInterface In NetworkInterface.GetAllNetworkInterfaces()
            sb.AppendLine(n.Description)
            sb.AppendLine("MAC:" & n.GetPhysicalAddress().ToString())
            For Each u As UnicastIPAddressInformation In n.GetIPProperties().UnicastAddresses
                sb.AppendLine("IP:" & u.Address.ToString())
            Next
            For Each g As GatewayIPAddressInformation In n.GetIPProperties().GatewayAddresses
                sb.AppendLine("Gateway:" & g.Address.ToString())
            Next

        Next


        MessageBox.Show(sb.ToString())

[Zeelia]

Well the default gateway varies for every user.
For example, my default gateway is 192.168.1.1 (that's the router default gateway).

Take a look at this example to get the default gateway:
http://www.java2s.com/Tutorial/CShar...figuration.htm
It's in C# but mentioned and VB.Net are very similar so there shouldn't be any problems porting the code.

You might also want to take a look at this VB.Net example, just to get some ideas (since this code requires user defined information)
http://www.xtremevbtalk.com/archive/.../t-251709.html

Also this VB6 example:
http://bytes.com/topic/visual-basic-...efault-gateway

Happy coding

*EDIT* Negative0: damn, you won this time... it took too long time for me to paste the links xD

[dbasnett]

The gateway is defined on a per network card level, so this code will get you the Gateway for each of the NICs installed on a machine:

        Dim sb As New StringBuilder
        sb.AppendLine()
        For Each n As NetworkInterface In NetworkInterface.GetAllNetworkInterfaces()
            sb.AppendLine(n.Description)
            sb.AppendLine("MAC:" & n.GetPhysicalAddress().ToString())
            For Each u As UnicastIPAddressInformation In n.GetIPProperties().UnicastAddresses
                sb.AppendLine("IP:" & u.Address.ToString())
            Next
            For Each g As GatewayIPAddressInformation In n.GetIPProperties().GatewayAddresses
                sb.AppendLine("Gateway:" & g.Address.ToString())
            Next

        Next


        MessageBox.Show(sb.ToString())

That code looks familiar.

[Negative0]

That code looks familiar.

Really? I wrote it from scratch. I googled to find out the classes to use, but the code is mine.

[dbasnett]

Really? I wrote it from scratch. I googled to find out the classes to use, but the code is mine.

I didn't mean anything, sorry.

[Crash893]

Well the default gateway varies for every user.
For example, my default gateway is 192.168.1.1 (that's the router default gateway).

Take a look at this example to get the default gateway:
http://www.java2s.com/Tutorial/CShar...figuration.htm
It's in C# but mentioned and VB.Net are very similar so there shouldn't be any problems porting the code.

You might also want to take a look at this VB.Net example, just to get some ideas (since this code requires user defined information)
http://www.xtremevbtalk.com/archive/.../t-251709.html

Also this VB6 example:
http://bytes.com/topic/visual-basic-...efault-gateway

Happy coding

*EDIT* Negative0: damn, you won this time... it took too long time for me to paste the links xD

I am working in c# so i was going to converet it anyway. There are alot more people in the vb rooms so its usually faster with more information if i just post here and then convert it over


StringBuilder sb = new StringBuilder();
sb.AppendLine();
foreach (NetworkInterface n in NetworkInterface.GetAllNetworkInterfaces())
{
sb.AppendLine(n.Description);
sb.AppendLine("MAC:" + n.GetPhysicalAddress().ToString());
foreach (UnicastIPAddressInformation u in n.GetIPProperties().UnicastAddresses)
{
sb.AppendLine("IP:" + u.Address.ToString());
}
foreach (GatewayIPAddressInformation g in n.GetIPProperties().GatewayAddresses)
{
sb.AppendLine("Gateway:" + g.Address.ToString());
}

}


MessageBox.Show(sb.ToString());

[Crash893]

The gateway is defined on a per network card level, so this code will get you the Gateway for each of the NICs installed on a machine:

        Dim sb As New StringBuilder
        sb.AppendLine()
        For Each n As NetworkInterface In NetworkInterface.GetAllNetworkInterfaces()
            sb.AppendLine(n.Description)
            sb.AppendLine("MAC:" & n.GetPhysicalAddress().ToString())
            For Each u As UnicastIPAddressInformation In n.GetIPProperties().UnicastAddresses
                sb.AppendLine("IP:" & u.Address.ToString())
            Next
            For Each g As GatewayIPAddressInformation In n.GetIPProperties().GatewayAddresses
                sb.AppendLine("Gateway:" & g.Address.ToString())
            Next

        Next


        MessageBox.Show(sb.ToString())

thanks this worked perfectly
(see above comment i converted it to c#)