std.socket and raw socket for Layer 2 capture.

[zann]

Hello together

I've a question about layer-2 (ethernet frames) capturing.
I have a Network and Linux Admin background, but not a really 
heavy programmer.

In C i can create a socket( AF_PACKET, SOCK_RAW, 0 ) and thats it.

```d
import core.stdc ... # there is no socket.d ...

# i used a:
$ grep -ir socket /usr/include/dlang/dmd/core/stdc/"
# but no success.
```

Ok so it's have to be possible with D there is all i need i think 
and at this moment i'm struggle on:

```d
import std.stdio;
import std.socket;


Socket init_sock() {
   auto socket = new Socket( AddressFamily.INET, SocketType.RAW, 
ProtocolType.RAW );
   socket.setOption( SocketOptionLevel.RAW, SocketOption.TYPE, 3 );
   return socket;
}

void main() {

   ubyte[1500] socket_buffer;

   writeln("init socket.");
   auto sock = init_sock();

   sock.receiveFrom( socket_buffer );
   writeln(socket_buffer);

}
```

But for the moment i think it's really impossible to capture 
ethernet frames with D.
Or can someone explain where my "error in head" is?

Capture ip packets or tcp / udp segments, thats all easy and i 
already did, but it is not what i need.
I need the whole Ethernet Frame.

Best regards

Erich Zann