arphdr Struct Reference

#include <net/if_arp.h>

Detailed Description

ARP packet header structure.

Data Fields

u_short ar_hrd

Format of hardware address.

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

ARP operation.

u_short arphdr::ar_hrd

Format of hardware address.
Nut/Net supports ARPHRD_ETHER only.

u_short arphdr::ar_op

ARP operation.
May be either ARPOP_REQUEST or ARPOP_REPLY.

u_short arphdr::ar_pro

Format of protocol address.
Only ETHERTYPE_IP is supported by Nut/Net.