Importing native methods in Xamarin.Mac

Question

I'm looking for a way to use SCNetworkInterfaceCopyAll in my Xamarin.Mac app. I've imported it

[DllImport("/System/Library/Frameworks/SystemConfiguration.framework/SystemConfiguration")]
public static extern IntPtr SCNetworkInterfaceCopyAll();

Then I get an array by calling var array = NSArray.ArrayFromHandle<NSObject>(pointer). But can't figure out how to get values from the output array of SCNetworkInterface. I've tried to marshal it as

[StructLayout(LayoutKind.Sequential)]
public struct Test
{
    IntPtr interface_type;
    IntPtr entity_hardware;
}

And then call Marshal.PtrToStructure<Test>(i.Handle) but it gives random pointers instead of meaningful values.

Did you get any luck to extract values from SCNetworkInterfaceCopyAll() ? — Anoop Vaidya, Dec 27 '19 at 06:04
@AnoopVaidya, unfortunately, I don't remember if I managed to fix it. — Artur Shamsutdinov, Jan 06 '20 at 10:46

score 0 · Answer 1 · edited Jun 20 '20 at 09:12

0

Can you use the information provided from System.Net.NetworkInformation. NetworkInterface (or do you need actually need a SCNetworkInterface?)

`Xamarin.Mac` Example:

foreach (NetworkInterface nic in NetworkInterface.GetAllNetworkInterfaces())
{
    if (nic.OperationalStatus == OperationalStatus.Up)
        Console.WriteLine(nic.GetPhysicalAddress());
}

edited Jun 20 '20 at 09:12

Community

1
1

answered Sep 19 '16 at 15:26

SushiHangover

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No, I need to know which interface is WiFi but unfortunately GetAllNetworkInterfaces for some reason return WiFi interface as Ethernet. – Artur Shamsutdinov Sep 19 '16 at 20:15
@ArturShamsutdinov What info do you need once you have the wireless interface? – SushiHangover Sep 19 '16 at 20:20
Basically my goal is to return list of active Ethernet interfaces with MAC addresses excluding WiFi interfaces. – Artur Shamsutdinov Sep 19 '16 at 20:40

score 0 · Answer 2 · answered Oct 10 '16 at 18:23

Looking at SCNetworkConfiguration.h it appears there are a number of C APIs you are to call on your IntPtr to retrieve the specific information you need.

CoreFoundation APIs often return "baton" pointers that you need to pass to other functions. Where did you see that struct definition?

score 0 · Answer 3 · answered Jan 08 '20 at 09:00

You can use Objective-C methods in Xamarin to get the MAC Address as C# gives a different MAC Address:

[DllImport("/System/Library/Frameworks/SystemConfiguration.framework/SystemConfiguration")]
public static extern IntPtr SCNetworkInterfaceCopyAll();

[DllImport("/System/Library/Frameworks/SystemConfiguration.framework/SystemConfiguration")]
public static extern IntPtr SCNetworkInterfaceGetHardwareAddressString(IntPtr scNetworkInterfaceRef);

private string MacAddress()
{
        string address = string.Empty;

        using (var interfaces = Runtime.GetNSObject<NSArray>(SCNetworkInterfaceCopyAll()))
        {
            for (nuint i = 0; i < interfaces.Count; i++)
            {
                IntPtr nic = interfaces.ValueAt(i);
                var addressPtr = SCNetworkInterfaceGetHardwareAddressString(nic);

                address = Runtime.GetNSObject<NSString>(addressPtr);

                if (address != null) break;
            }
        }
        return address;
}

Importing native methods in Xamarin.Mac

3 Answers3

Xamarin.Mac Example:

`Xamarin.Mac` Example: