-#define ETHERTYPE_ARP 0x0806 /* Addr. resolution protocol */
-
-struct arphdr {
- u_short ar_hrd; /* format of hardware address */
-#define ARPHRD_ETHER 1 /* ethernet hardware format */
-#define ARPHRD_FRELAY 15 /* frame relay hardware format */
- u_short ar_pro; /* format of protocol address */
- u_char ar_hln; /* length of hardware address */
- u_char ar_pln; /* length of protocol address */
- u_short ar_op; /* one of: */
-#define ARPOP_REQUEST 1 /* request to resolve address */
-#define ARPOP_REPLY 2 /* response to previous request */
-#define ARPOP_REVREQUEST 3 /* request protocol address given hardware */
-#define ARPOP_REVREPLY 4 /* response giving protocol address */
-#define ARPOP_INVREQUEST 8 /* request to identify peer */
-#define ARPOP_INVREPLY 9 /* response identifying peer */
-};
-
-#define ETHER_ADDR_LEN 6
-
-struct ether_arp {
- struct arphdr ea_hdr; /* fixed-size header */
- u_char arp_sha[ETHER_ADDR_LEN]; /* sender hardware address */
- u_char arp_spa[4]; /* sender protocol address */
- u_char arp_tha[ETHER_ADDR_LEN]; /* target hardware address */
- u_char arp_tpa[4]; /* target protocol address */
-};
-#define arp_hrd ea_hdr.ar_hrd
-#define arp_pro ea_hdr.ar_pro
-#define arp_hln ea_hdr.ar_hln
-#define arp_pln ea_hdr.ar_pln
-#define arp_op ea_hdr.ar_op