1 /* 2 * Fundamental constants relating to ARP Protocol 3 * 4 * Portions of this code are copyright (c) 2021 Cypress Semiconductor Corporation 5 * 6 * Copyright (C) 1999-2017, Broadcom Corporation 7 * 8 * Unless you and Broadcom execute a separate written software license 9 * agreement governing use of this software, this software is licensed to you 10 * under the terms of the GNU General Public License version 2 (the "GPL"), 11 * available at http://www.broadcom.com/licenses/GPLv2.php, with the 12 * following added to such license: 13 * 14 * As a special exception, the copyright holders of this software give you 15 * permission to link this software with independent modules, and to copy and 16 * distribute the resulting executable under terms of your choice, provided that 17 * you also meet, for each linked independent module, the terms and conditions of 18 * the license of that module. An independent module is a module which is not 19 * derived from this software. The special exception does not apply to any 20 * modifications of the software. 21 * 22 * Notwithstanding the above, under no circumstances may you combine this 23 * software in any way with any other Broadcom software provided under a license 24 * other than the GPL, without Broadcom's express prior written consent. 25 * 26 * 27 * <<Broadcom-WL-IPTag/Open:>> 28 * 29 * $Id$ 30 */ 31 32 #ifndef _bcmarp_h_ 33 #define _bcmarp_h_ 34 35 #ifndef _TYPEDEFS_H_ 36 #include <typedefs.h> 37 #endif // endif 38 #include <bcmip.h> 39 40 /* This marks the start of a packed structure section. */ 41 #include <packed_section_start.h> 42 43 #define ARP_OPC_OFFSET 6 /* option code offset */ 44 #define ARP_SRC_ETH_OFFSET 8 /* src h/w address offset */ 45 #define ARP_SRC_IP_OFFSET 14 /* src IP address offset */ 46 #define ARP_TGT_ETH_OFFSET 18 /* target h/w address offset */ 47 #define ARP_TGT_IP_OFFSET 24 /* target IP address offset */ 48 49 #define ARP_OPC_REQUEST 1 /* ARP request */ 50 #define ARP_OPC_REPLY 2 /* ARP reply */ 51 52 #define ARP_DATA_LEN 28 /* ARP data length */ 53 54 #define HTYPE_ETHERNET 1 /* htype for ethernet */ 55 #define HTYPE_WLAN 6 /* htype for IEEE 802 */ 56 BWL_PRE_PACKED_STRUCT struct bcmarp { 57 uint16 htype; /* Header type (1 = ethernet) */ 58 uint16 ptype; /* Protocol type (0x800 = IP) */ 59 uint8 hlen; /* Hardware address length (Eth = 6) */ 60 uint8 plen; /* Protocol address length (IP = 4) */ 61 uint16 oper; /* ARP_OPC_... */ 62 uint8 src_eth[ETHER_ADDR_LEN]; /* Source hardware address */ 63 uint8 src_ip[IPV4_ADDR_LEN]; /* Source protocol address (not aligned) */ 64 uint8 dst_eth[ETHER_ADDR_LEN]; /* Destination hardware address */ 65 uint8 dst_ip[IPV4_ADDR_LEN]; /* Destination protocol address */ 66 } BWL_POST_PACKED_STRUCT; 67 68 /* Ethernet header + Arp message */ 69 BWL_PRE_PACKED_STRUCT struct bcmetharp { 70 struct ether_header eh; 71 struct bcmarp arp; 72 } BWL_POST_PACKED_STRUCT; 73 74 /* IPv6 Neighbor Advertisement */ 75 #define NEIGHBOR_ADVERTISE_SRC_IPV6_OFFSET 8 /* src IPv6 address offset */ 76 #define NEIGHBOR_ADVERTISE_TYPE_OFFSET 40 /* type offset */ 77 #define NEIGHBOR_ADVERTISE_CHECKSUM_OFFSET 42 /* check sum offset */ 78 #define NEIGHBOR_ADVERTISE_FLAGS_OFFSET 44 /* R,S and O flags offset */ 79 #define NEIGHBOR_ADVERTISE_TGT_IPV6_OFFSET 48 /* target IPv6 address offset */ 80 #define NEIGHBOR_ADVERTISE_OPTION_OFFSET 64 /* options offset */ 81 #define NEIGHBOR_ADVERTISE_TYPE 136 82 #define NEIGHBOR_SOLICITATION_TYPE 135 83 84 #define OPT_TYPE_SRC_LINK_ADDR 1 85 #define OPT_TYPE_TGT_LINK_ADDR 2 86 87 #define NEIGHBOR_ADVERTISE_DATA_LEN 72 /* neighbor advertisement data length */ 88 #define NEIGHBOR_ADVERTISE_FLAGS_VALUE 0x60 /* R=0, S=1 and O=1 */ 89 90 /* This marks the end of a packed structure section. */ 91 #include <packed_section_end.h> 92 93 #endif /* !defined(_bcmarp_h_) */ 94