uint8_t dl_src[6]; /* Ethernet source address. */
uint8_t dl_dst[6]; /* Ethernet destination address. */
uint8_t nw_proto; /* IP protocol or lower 8 bits of
- ARP opcode. */
+ ARP opcode. */
uint8_t dl_vlan_pcp; /* Input VLAN priority. */
uint8_t nw_tos; /* IP ToS (DSCP field, 6 bits). */
uint8_t reserved[3]; /* Align to 32-bits...must be zeroed. */