1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Fundamental constants relating to ARP Protocol 4 * 5 * Copyright (C) 1999-2019, Broadcom. 6 * 7 * Unless you and Broadcom execute a separate written software license 8 * agreement governing use of this software, this software is licensed to you 9 * under the terms of the GNU General Public License version 2 (the "GPL"), 10 * available at http://www.broadcom.com/licenses/GPLv2.php, with the 11 * following added to such license: 12 * 13 * As a special exception, the copyright holders of this software give you 14 * permission to link this software with independent modules, and to copy and 15 * distribute the resulting executable under terms of your choice, provided that 16 * you also meet, for each linked independent module, the terms and conditions of 17 * the license of that module. An independent module is a module which is not 18 * derived from this software. The special exception does not apply to any 19 * modifications of the software. 20 * 21 * Notwithstanding the above, under no circumstances may you combine this 22 * software in any way with any other Broadcom software provided under a license 23 * other than the GPL, without Broadcom's express prior written consent. 24 * 25 * 26 * <<Broadcom-WL-IPTag/Open:>> 27 * 28 * $Id: bcmarp.h 701633 2017-05-25 23:07:17Z $ 29 */ 30 31 #ifndef _bcmarp_h_ 32 #define _bcmarp_h_ 33 34 #ifndef _TYPEDEFS_H_ 35 #include <typedefs.h> 36 #endif // endif 37 #include <bcmip.h> 38 39 /* This marks the start of a packed structure section. */ 40 #include <packed_section_start.h> 41 42 #define ARP_OPC_OFFSET 6 /* option code offset */ 43 #define ARP_SRC_ETH_OFFSET 8 /* src h/w address offset */ 44 #define ARP_SRC_IP_OFFSET 14 /* src IP address offset */ 45 #define ARP_TGT_ETH_OFFSET 18 /* target h/w address offset */ 46 #define ARP_TGT_IP_OFFSET 24 /* target IP address offset */ 47 48 #define ARP_OPC_REQUEST 1 /* ARP request */ 49 #define ARP_OPC_REPLY 2 /* ARP reply */ 50 51 #define ARP_DATA_LEN 28 /* ARP data length */ 52 53 #define HTYPE_ETHERNET 1 /* htype for ethernet */ 54 BWL_PRE_PACKED_STRUCT struct bcmarp { 55 uint16 htype; /* Header type (1 = ethernet) */ 56 uint16 ptype; /* Protocol type (0x800 = IP) */ 57 uint8 hlen; /* Hardware address length (Eth = 6) */ 58 uint8 plen; /* Protocol address length (IP = 4) */ 59 uint16 oper; /* ARP_OPC_... */ 60 uint8 src_eth[ETHER_ADDR_LEN]; /* Source hardware address */ 61 uint8 src_ip[IPV4_ADDR_LEN]; /* Source protocol address (not aligned) */ 62 uint8 dst_eth[ETHER_ADDR_LEN]; /* Destination hardware address */ 63 uint8 dst_ip[IPV4_ADDR_LEN]; /* Destination protocol address */ 64 } BWL_POST_PACKED_STRUCT; 65 66 /* Ethernet header + Arp message */ 67 BWL_PRE_PACKED_STRUCT struct bcmetharp { 68 struct ether_header eh; 69 struct bcmarp arp; 70 } BWL_POST_PACKED_STRUCT; 71 72 /* IPv6 Neighbor Advertisement */ 73 #define NEIGHBOR_ADVERTISE_SRC_IPV6_OFFSET 8 /* src IPv6 address offset */ 74 #define NEIGHBOR_ADVERTISE_TYPE_OFFSET 40 /* type offset */ 75 #define NEIGHBOR_ADVERTISE_CHECKSUM_OFFSET 42 /* check sum offset */ 76 #define NEIGHBOR_ADVERTISE_FLAGS_OFFSET 44 /* R,S and O flags offset */ 77 #define NEIGHBOR_ADVERTISE_TGT_IPV6_OFFSET 48 /* target IPv6 address offset */ 78 #define NEIGHBOR_ADVERTISE_OPTION_OFFSET 64 /* options offset */ 79 #define NEIGHBOR_ADVERTISE_TYPE 136 80 #define NEIGHBOR_SOLICITATION_TYPE 135 81 82 #define OPT_TYPE_SRC_LINK_ADDR 1 83 #define OPT_TYPE_TGT_LINK_ADDR 2 84 85 #define NEIGHBOR_ADVERTISE_DATA_LEN 72 /* neighbor advertisement data length */ 86 #define NEIGHBOR_ADVERTISE_FLAGS_VALUE 0x60 /* R=0, S=1 and O=1 */ 87 88 /* This marks the end of a packed structure section. */ 89 #include <packed_section_end.h> 90 91 #endif /* !defined(_bcmarp_h_) */ 92