/*
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* Fundamental constants relating to ARP Protocol
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*
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* Copyright (C) 2020, Broadcom.
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*
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* Unless you and Broadcom execute a separate written software license
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* agreement governing use of this software, this software is licensed to you
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* under the terms of the GNU General Public License version 2 (the "GPL"),
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* available at http://www.broadcom.com/licenses/GPLv2.php, with the
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* following added to such license:
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*
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* As a special exception, the copyright holders of this software give you
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* permission to link this software with independent modules, and to copy and
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* distribute the resulting executable under terms of your choice, provided that
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* you also meet, for each linked independent module, the terms and conditions of
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* the license of that module. An independent module is a module which is not
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* derived from this software. The special exception does not apply to any
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* modifications of the software.
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*
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*
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* <<Broadcom-WL-IPTag/Dual:>>
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*/
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#ifndef _bcmarp_h_
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#define _bcmarp_h_
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#ifndef _TYPEDEFS_H_
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#include <typedefs.h>
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#endif
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#include <bcmip.h>
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/* This marks the start of a packed structure section. */
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#include <packed_section_start.h>
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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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#define HTYPE_ETHERNET 1 /* htype for ethernet */
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BWL_PRE_PACKED_STRUCT 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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} BWL_POST_PACKED_STRUCT;
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/* Ethernet header + Arp message */
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BWL_PRE_PACKED_STRUCT struct bcmetharp {
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struct ether_header eh;
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struct bcmarp arp;
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} BWL_POST_PACKED_STRUCT;
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/* IPv6 Neighbor Advertisement */
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#define NEIGHBOR_ADVERTISE_SRC_IPV6_OFFSET 8 /* src IPv6 address offset */
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#define NEIGHBOR_ADVERTISE_TYPE_OFFSET 40 /* type offset */
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#define NEIGHBOR_ADVERTISE_CHECKSUM_OFFSET 42 /* check sum offset */
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#define NEIGHBOR_ADVERTISE_FLAGS_OFFSET 44 /* R,S and O flags offset */
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#define NEIGHBOR_ADVERTISE_TGT_IPV6_OFFSET 48 /* target IPv6 address offset */
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#define NEIGHBOR_ADVERTISE_OPTION_OFFSET 64 /* options offset */
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#define NEIGHBOR_ADVERTISE_TYPE 136
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#define NEIGHBOR_SOLICITATION_TYPE 135
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#define OPT_TYPE_SRC_LINK_ADDR 1
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#define OPT_TYPE_TGT_LINK_ADDR 2
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#define NEIGHBOR_ADVERTISE_DATA_LEN 72 /* neighbor advertisement data length */
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#define NEIGHBOR_ADVERTISE_FLAGS_VALUE 0x60 /* R=0, S=1 and O=1 */
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/* This marks the end of a packed structure section. */
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#include <packed_section_end.h>
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#endif /* !defined(_bcmarp_h_) */
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