Building a custom non-ip packet with libnet

Hi,

I would like to build a custom packet over ethernet using libnet.
The packet in non-ip packet.
I saw the examples in libnet but they are all building an IP packets.

should i use the "raw socket interface" or "link layer interface" ?
what is the best library to perform this task libnet/libdnet/netwib ?

Any help/suggestion would be appreciated.....


Thanks,