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| 1 | /* arp.h - Address Resolution Protocol packet format.
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| 2 | * Author: Kees J. Bot
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| 3 | * 16 Dec 2000
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| 4 | */
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| 5 | #ifndef ARP_H
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| 6 | #define ARP_H
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| 7 |
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| 8 | typedef struct arp46 {
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| 9 | ether_addr_t dstaddr;
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| 10 | ether_addr_t srcaddr;
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| 11 | ether_type_t ethtype; /* ARP_PROTO. */
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| 12 | u16_t hdr, pro; /* ARP_ETHERNET & ETH_IP_PROTO. */
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| 13 | u8_t hln, pln; /* 6 & 4. */
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| 14 | u16_t op; /* ARP_REQUEST or ARP_REPLY. */
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| 15 | ether_addr_t sha; /* Source hardware address. */
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| 16 | u8_t spa[4]; /* Source protocol address. */
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| 17 | ether_addr_t tha; /* Likewise for the target. */
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| 18 | u8_t tpa[4];
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| 19 | char padding[60 - (4*6 + 2*4 + 4*2 + 2*1)];
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| 20 | } arp46_t;
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| 21 |
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| 22 | #define ARP_ETHERNET 1 /* ARP on Ethernet. */
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| 23 | #define ARP_REQUEST 1 /* A request for an IP address. */
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| 24 | #define ARP_REPLY 2 /* A reply to a request. */
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| 25 |
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| 26 | #endif /* ARP_H */
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