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796a9d1091
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@15242 3c298f89-4303-0410-b956-a3cf2f4a3e73
60 lines
1.8 KiB
C
60 lines
1.8 KiB
C
/*
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* Copyright 2007, Broadcom Corporation
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* All Rights Reserved.
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*
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* This is UNPUBLISHED PROPRIETARY SOURCE CODE of Broadcom Corporation;
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* the contents of this file may not be disclosed to third parties, copied
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* or duplicated in any form, in whole or in part, without the prior
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* written permission of Broadcom Corporation.
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*
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* Fundamental constants relating to ARP Protocol
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*
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*/
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#ifndef _bcmarp_h_
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#define _bcmarp_h_
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/* enable structure packing */
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#if defined(__GNUC__)
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#define PACKED __attribute__((packed))
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#else
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#pragma pack(1)
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#define PACKED
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#endif
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#define ARP_OPC_OFFSET 6 /* option code offset */
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#define ARP_SRC_ETH_OFFSET 8 /* src h/w address offset */
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#define ARP_SRC_IP_OFFSET 14 /* src IP address offset */
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#define ARP_TGT_ETH_OFFSET 18 /* target h/w address offset */
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#define ARP_TGT_IP_OFFSET 24 /* target IP address offset */
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#define ARP_OPC_REQUEST 1 /* ARP request */
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#define ARP_OPC_REPLY 2 /* ARP reply */
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#define ARP_DATA_LEN 28 /* ARP data length */
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struct bcmarp {
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uint16 htype; /* Header type (1 = ethernet) */
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uint16 ptype; /* Protocol type (0x800 = IP) */
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uint8 hlen; /* Hardware address length (Eth = 6) */
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uint8 plen; /* Protocol address length (IP = 4) */
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uint16 oper; /* ARP_OPC_... */
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uint8 src_eth[ETHER_ADDR_LEN]; /* Source hardware address */
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uint8 src_ip[IPV4_ADDR_LEN]; /* Source protocol address (not aligned) */
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uint8 dst_eth[ETHER_ADDR_LEN]; /* Destination hardware address */
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uint8 dst_ip[IPV4_ADDR_LEN]; /* Destination protocol address */
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} PACKED;
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/* Ethernet header + Arp message */
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struct bcmetharp {
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struct ether_header eh;
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struct bcmarp arp;
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} PACKED;
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#undef PACKED
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#if !defined(__GNUC__)
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#pragma pack()
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#endif
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#endif /* !defined(_bcmarp_h_) */
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