/* * From FreeBSD 2.2.7: Fundamental constants relating to ethernet. * * Copyright (C) 1999-2012, Broadcom Corporation * * Unless you and Broadcom execute a separate written software license * agreement governing use of this software, this software is licensed to you * under the terms of the GNU General Public License version 2 (the "GPL"), * available at http://www.broadcom.com/licenses/GPLv2.php, with the * following added to such license: * * As a special exception, the copyright holders of this software give you * permission to link this software with independent modules, and to copy and * distribute the resulting executable under terms of your choice, provided that * you also meet, for each linked independent module, the terms and conditions of * the license of that module. An independent module is a module which is not * derived from this software. The special exception does not apply to any * modifications of the software. * * Notwithstanding the above, under no circumstances may you combine this * software in any way with any other Broadcom software provided under a license * other than the GPL, without Broadcom's express prior written consent. * * $Id: ethernet.h 309193 2012-01-19 00:03:57Z $ */ #ifndef _NET_ETHERNET_H_ /* use native BSD ethernet.h when available */ #define _NET_ETHERNET_H_ #ifndef _TYPEDEFS_H_ #include "typedefs.h" #endif /* This marks the start of a packed structure section. */ #include /* * The number of bytes in an ethernet (MAC) address. */ #define ETHER_ADDR_LEN 6 /* * The number of bytes in the type field. */ #define ETHER_TYPE_LEN 2 /* * The number of bytes in the trailing CRC field. */ #define ETHER_CRC_LEN 4 /* * The length of the combined header. */ #define ETHER_HDR_LEN (ETHER_ADDR_LEN * 2 + ETHER_TYPE_LEN) /* * The minimum packet length. */ #define ETHER_MIN_LEN 64 /* * The minimum packet user data length. */ #define ETHER_MIN_DATA 46 /* * The maximum packet length. */ #define ETHER_MAX_LEN 1518 /* * The maximum packet user data length. */ #define ETHER_MAX_DATA 1500 /* ether types */ #define ETHER_TYPE_MIN 0x0600 /* Anything less than MIN is a length */ #define ETHER_TYPE_IP 0x0800 /* IP */ #define ETHER_TYPE_ARP 0x0806 /* ARP */ #define ETHER_TYPE_8021Q 0x8100 /* 802.1Q */ #define ETHER_TYPE_IPV6 0x86dd /* IPv6 */ #define ETHER_TYPE_BRCM 0x886c /* Broadcom Corp. */ #define ETHER_TYPE_802_1X 0x888e /* 802.1x */ #define ETHER_TYPE_802_1X_PREAUTH 0x88c7 /* 802.1x preauthentication */ #define ETHER_TYPE_WAI 0x88b4 /* WAI */ #define ETHER_TYPE_89_0D 0x890d /* 89-0d frame for TDLS */ #define ETHER_TYPE_IPV6 0x86dd /* IPV6 */ /* Broadcom subtype follows ethertype; First 2 bytes are reserved; Next 2 are subtype; */ #define ETHER_BRCM_SUBTYPE_LEN 4 /* Broadcom 4 byte subtype */ /* ether header */ #define ETHER_DEST_OFFSET (0 * ETHER_ADDR_LEN) /* dest address offset */ #define ETHER_SRC_OFFSET (1 * ETHER_ADDR_LEN) /* src address offset */ #define ETHER_TYPE_OFFSET (2 * ETHER_ADDR_LEN) /* ether type offset */ /* * A macro to validate a length with */ #define ETHER_IS_VALID_LEN(foo) \ ((foo) >= ETHER_MIN_LEN && (foo) <= ETHER_MAX_LEN) #define ETHER_FILL_MCAST_ADDR_FROM_IP(ea, mgrp_ip) { \ ((uint8 *)ea)[0] = 0x01; \ ((uint8 *)ea)[1] = 0x00; \ ((uint8 *)ea)[2] = 0x5e; \ ((uint8 *)ea)[3] = ((mgrp_ip) >> 16) & 0x7f; \ ((uint8 *)ea)[4] = ((mgrp_ip) >> 8) & 0xff; \ ((uint8 *)ea)[5] = ((mgrp_ip) >> 0) & 0xff; \ } #ifndef __INCif_etherh /* Quick and ugly hack for VxWorks */ /* * Structure of a 10Mb/s Ethernet header. */ BWL_PRE_PACKED_STRUCT struct ether_header { uint8 ether_dhost[ETHER_ADDR_LEN]; uint8 ether_shost[ETHER_ADDR_LEN]; uint16 ether_type; } BWL_POST_PACKED_STRUCT; /* * Structure of a 48-bit Ethernet address. */ BWL_PRE_PACKED_STRUCT struct ether_addr { uint8 octet[ETHER_ADDR_LEN]; } BWL_POST_PACKED_STRUCT; #endif /* !__INCif_etherh Quick and ugly hack for VxWorks */ /* * Takes a pointer, set, test, clear, toggle locally admininistered * address bit in the 48-bit Ethernet address. */ #define ETHER_SET_LOCALADDR(ea) (((uint8 *)(ea))[0] = (((uint8 *)(ea))[0] | 2)) #define ETHER_IS_LOCALADDR(ea) (((uint8 *)(ea))[0] & 2) #define ETHER_CLR_LOCALADDR(ea) (((uint8 *)(ea))[0] = (((uint8 *)(ea))[0] & 0xfd)) #define ETHER_TOGGLE_LOCALADDR(ea) (((uint8 *)(ea))[0] = (((uint8 *)(ea))[0] ^ 2)) /* Takes a pointer, marks unicast address bit in the MAC address */ #define ETHER_SET_UNICAST(ea) (((uint8 *)(ea))[0] = (((uint8 *)(ea))[0] & ~1)) /* * Takes a pointer, returns true if a 48-bit multicast address * (including broadcast, since it is all ones) */ #define ETHER_ISMULTI(ea) (((const uint8 *)(ea))[0] & 1) /* compare two ethernet addresses - assumes the pointers can be referenced as shorts */ #define ether_cmp(a, b) (!(((short*)(a))[0] == ((short*)(b))[0]) | \ !(((short*)(a))[1] == ((short*)(b))[1]) | \ !(((short*)(a))[2] == ((short*)(b))[2])) /* copy an ethernet address - assumes the pointers can be referenced as shorts */ #define ether_copy(s, d) { \ ((short*)(d))[0] = ((const short*)(s))[0]; \ ((short*)(d))[1] = ((const short*)(s))[1]; \ ((short*)(d))[2] = ((const short*)(s))[2]; } static const struct ether_addr ether_bcast = {{255, 255, 255, 255, 255, 255}}; static const struct ether_addr ether_null = {{0, 0, 0, 0, 0, 0}}; #define ETHER_ISBCAST(ea) ((((uint8 *)(ea))[0] & \ ((uint8 *)(ea))[1] & \ ((uint8 *)(ea))[2] & \ ((uint8 *)(ea))[3] & \ ((uint8 *)(ea))[4] & \ ((uint8 *)(ea))[5]) == 0xff) #define ETHER_ISNULLADDR(ea) ((((uint8 *)(ea))[0] | \ ((uint8 *)(ea))[1] | \ ((uint8 *)(ea))[2] | \ ((uint8 *)(ea))[3] | \ ((uint8 *)(ea))[4] | \ ((uint8 *)(ea))[5]) == 0) #define ETHER_MOVE_HDR(d, s) \ do { \ struct ether_header t; \ t = *(struct ether_header *)(s); \ *(struct ether_header *)(d) = t; \ } while (0) /* This marks the end of a packed structure section. */ #include #endif /* _NET_ETHERNET_H_ */