/* * From FreeBSD 2.2.7: Fundamental constants relating to ethernet. * * Copyright 2006, Broadcom Corporation * All Rights Reserved. * * THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY * KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM * SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS * FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE. * * $Id: ethernet.h,v 1.1.1.14 2006/02/27 03:43:16 honor Exp $ */ #ifndef _NET_ETHERNET_H_ /* use native BSD ethernet.h when available */ #define _NET_ETHERNET_H_ #ifndef _TYPEDEFS_H_ #include "typedefs.h" #endif /* enable structure packing */ #if defined(__GNUC__) #define PACKED __attribute__((packed)) #else #pragma pack(1) #define PACKED #endif /* * 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_IP 0x0800 /* IP */ #define ETHER_TYPE_ARP 0x0806 /* ARP */ #define ETHER_TYPE_8021Q 0x8100 /* 802.1Q */ #define ETHER_TYPE_BRCM 0x886c /* Broadcom Corp. */ #define ETHER_TYPE_802_1X 0x888e /* 802.1x */ #ifdef BCMWPA2 #define ETHER_TYPE_802_1X_PREAUTH 0x88c7 /* 802.1x preauthentication */ #endif /* Broadcom subtype follows ethertype; First 2 bytes are reserved; Next 2 are subtype; */ #define ETHER_BRCM_SUBTYPE_LEN 4 /* Broadcom 4 byte subtype */ #define ETHER_BRCM_CRAM 0x1 /* Broadcom subtype cram protocol */ /* ether header */ #define ETHER_DEST_OFFSET 0 /* dest address offset */ #define ETHER_SRC_OFFSET 6 /* src address offset */ #define ETHER_TYPE_OFFSET 12 /* ether type offset */ /* * A macro to validate a length with */ #define ETHER_IS_VALID_LEN(foo) \ ((foo) >= ETHER_MIN_LEN && (foo) <= ETHER_MAX_LEN) #ifndef __INCif_etherh /* Quick and ugly hack for VxWorks */ /* * Structure of a 10Mb/s Ethernet header. */ struct ether_header { uint8 ether_dhost[ETHER_ADDR_LEN]; uint8 ether_shost[ETHER_ADDR_LEN]; uint16 ether_type; } PACKED; /* * Structure of a 48-bit Ethernet address. */ struct ether_addr { uint8 octet[ETHER_ADDR_LEN]; } PACKED; #endif /* !__INCif_etherh Quick and ugly hack for VxWorks */ /* * Takes a pointer, sets locally admininistered * address bit in the 48-bit Ethernet address. */ #define ETHER_SET_LOCALADDR(ea) (((uint8 *)(ea))[0] = (((uint8 *)(ea))[0] | 2)) /* * Takes a pointer, returns true if a 48-bit multicast address * (including broadcast, since it is all ones) */ #define ETHER_ISMULTI(ea) (((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] = ((short*)s)[0]; \ ((short*)d)[1] = ((short*)s)[1]; \ ((short*)d)[2] = ((short*)s)[2]; } /* * Takes a pointer, returns true if a 48-bit broadcast (all ones) */ #define ETHER_ISBCAST(ea) ((((uint8 *)(ea))[0] & \ ((uint8 *)(ea))[1] & \ ((uint8 *)(ea))[2] & \ ((uint8 *)(ea))[3] & \ ((uint8 *)(ea))[4] & \ ((uint8 *)(ea))[5]) == 0xff) static const struct ether_addr ether_bcast = {{255, 255, 255, 255, 255, 255}}; /* * Takes a pointer, returns true if a 48-bit null address (all zeros) */ #define ETHER_ISNULLADDR(ea) ((((uint8 *)(ea))[0] | \ ((uint8 *)(ea))[1] | \ ((uint8 *)(ea))[2] | \ ((uint8 *)(ea))[3] | \ ((uint8 *)(ea))[4] | \ ((uint8 *)(ea))[5]) == 0) #undef PACKED #if !defined(__GNUC__) #pragma pack() #endif #endif /* _NET_ETHERNET_H_ */