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Location:
ARP.H
struct arphdr;
Address Resolution Protocol.
See RFC 826 for protocol description. ARP packets are variable in size; the arphdr structure defines the fixed-length portion. Protocol type values are the same as those for 10 Mb/s Ethernet. It is followed by the variable-sized fields ar_sha, arp_spa, arp_tha and arp_tpa in that order, according to the lengths specified. Field names used correspond to RFC 826.
Defined in arphdr:
ar_hln, ar_hrd, ar_op, ar_pln, ar_pro
u_short ar_op;