/* * BSD's ARCNET headers have the source host, destination host, * and type at the beginning of the packet; that's what's handed * up to userland via BPF. * * Linux's ARCNET headers, however, have a 2-byte offset field * between the host IDs and the type; that's what's handed up * to userland via PF_PACKET sockets. * * We therefore have to have separate DLT_ values for them. */