Fields
state: SimpleNetworkState,
hw_address_size: u32,
media_header_size: u32,
max_packet_size: u32,
nvram_size: u32,
nvram_access_size: u32,
receive_filter_mask: SimpleNetworkReceiveFilter,
receive_filter_setting: SimpleNetworkReceiveFilter,
max_mcast_filter_count: u32,
mcast_filter_count: u32,
mcast_filter: [16]MacAddress,
current_address: MacAddress,
broadcast_address: MacAddress,
permanent_address: MacAddress,
if_type: u8,
mac_address_changeable: bool,
multiple_tx_supported: bool,
media_present_supported: bool,
media_present: bool,