173 lines
4.7 KiB
C
173 lines
4.7 KiB
C
/*
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* From FreeBSD 2.2.7: Fundamental constants relating to ethernet.
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*
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* Copyright 2007, Broadcom Corporation
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* All Rights Reserved.
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*
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* THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY
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* KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM
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* SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
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* FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE.
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*
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*/
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#ifndef _NET_ETHERNET_H_ /* use native BSD ethernet.h when available */
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#define _NET_ETHERNET_H_
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#ifndef _TYPEDEFS_H_
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#include "typedefs.h"
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#endif
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/* enable structure packing */
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#if defined(__GNUC__)
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#define PACKED __attribute__((packed))
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#else
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#pragma pack(1)
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#define PACKED
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#endif
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/*
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* The number of bytes in an ethernet (MAC) address.
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*/
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#define ETHER_ADDR_LEN 6
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/*
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* The number of bytes in the type field.
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*/
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#define ETHER_TYPE_LEN 2
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/*
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* The number of bytes in the trailing CRC field.
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*/
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#define ETHER_CRC_LEN 4
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/*
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* The length of the combined header.
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*/
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#define ETHER_HDR_LEN (ETHER_ADDR_LEN * 2 + ETHER_TYPE_LEN)
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/*
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* The minimum packet length.
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*/
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#define ETHER_MIN_LEN 64
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/*
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* The minimum packet user data length.
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*/
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#define ETHER_MIN_DATA 46
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/*
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* The maximum packet length.
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*/
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#define ETHER_MAX_LEN 1518
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/*
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* The maximum packet user data length.
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*/
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#define ETHER_MAX_DATA 1500
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/* ether types */
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#define ETHER_TYPE_MIN 0x0600 /* Anything less than MIN is a length */
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#define ETHER_TYPE_IP 0x0800 /* IP */
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#define ETHER_TYPE_ARP 0x0806 /* ARP */
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#define ETHER_TYPE_8021Q 0x8100 /* 802.1Q */
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#define ETHER_TYPE_BRCM 0x886c /* Broadcom Corp. */
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#define ETHER_TYPE_802_1X 0x888e /* 802.1x */
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#ifdef BCMWPA2
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#define ETHER_TYPE_802_1X_PREAUTH 0x88c7 /* 802.1x preauthentication */
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#endif
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/* Broadcom subtype follows ethertype; First 2 bytes are reserved; Next 2 are subtype; */
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#define ETHER_BRCM_SUBTYPE_LEN 4 /* Broadcom 4 byte subtype */
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#define ETHER_BRCM_CRAM 0x1 /* Broadcom subtype cram protocol */
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/* ether header */
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#define ETHER_DEST_OFFSET (0 * ETHER_ADDR_LEN) /* dest address offset */
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#define ETHER_SRC_OFFSET (1 * ETHER_ADDR_LEN) /* src address offset */
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#define ETHER_TYPE_OFFSET (2 * ETHER_ADDR_LEN) /* ether type offset */
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/*
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* A macro to validate a length with
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*/
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#define ETHER_IS_VALID_LEN(foo) \
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((foo) >= ETHER_MIN_LEN && (foo) <= ETHER_MAX_LEN)
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#ifndef __INCif_etherh /* Quick and ugly hack for VxWorks */
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/*
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* Structure of a 10Mb/s Ethernet header.
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*/
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struct ether_header {
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uint8 ether_dhost[ETHER_ADDR_LEN];
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uint8 ether_shost[ETHER_ADDR_LEN];
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uint16 ether_type;
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} PACKED;
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/*
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* Structure of a 48-bit Ethernet address.
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*/
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struct ether_addr {
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uint8 octet[ETHER_ADDR_LEN];
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} PACKED;
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#endif /* !__INCif_etherh Quick and ugly hack for VxWorks */
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/*
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* Takes a pointer, set, test, clear, toggle locally admininistered
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* address bit in the 48-bit Ethernet address.
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*/
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#define ETHER_SET_LOCALADDR(ea) (((uint8 *)(ea))[0] = (((uint8 *)(ea))[0] | 2))
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#define ETHER_IS_LOCALADDR(ea) (((uint8 *)(ea))[0] & 2)
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#define ETHER_CLR_LOCALADDR(ea) (((uint8 *)(ea))[0] = (((uint8 *)(ea))[0] & 0xd))
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#define ETHER_TOGGLE_LOCALADDR(ea) (((uint8 *)(ea))[0] = (((uint8 *)(ea))[0] ^ 2))
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/* Takes a pointer, marks unicast address bit in the MAC address */
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#define ETHER_SET_UNICAST(ea) (((uint8 *)(ea))[0] = (((uint8 *)(ea))[0] & ~1))
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/*
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* Takes a pointer, returns true if a 48-bit multicast address
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* (including broadcast, since it is all ones)
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*/
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#define ETHER_ISMULTI(ea) (((const uint8 *)(ea))[0] & 1)
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/* compare two ethernet addresses - assumes the pointers can be referenced as shorts */
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#define ether_cmp(a, b) (!(((short*)a)[0] == ((short*)b)[0]) | \
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!(((short*)a)[1] == ((short*)b)[1]) | \
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!(((short*)a)[2] == ((short*)b)[2]))
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/* copy an ethernet address - assumes the pointers can be referenced as shorts */
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#define ether_copy(s, d) { \
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((short*)d)[0] = ((short*)s)[0]; \
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((short*)d)[1] = ((short*)s)[1]; \
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((short*)d)[2] = ((short*)s)[2]; }
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/*
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* Takes a pointer, returns true if a 48-bit broadcast (all ones)
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*/
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#define ETHER_ISBCAST(ea) ((((uint8 *)(ea))[0] & \
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((uint8 *)(ea))[1] & \
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((uint8 *)(ea))[2] & \
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((uint8 *)(ea))[3] & \
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((uint8 *)(ea))[4] & \
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((uint8 *)(ea))[5]) == 0xff)
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static const struct ether_addr ether_bcast = {{255, 255, 255, 255, 255, 255}};
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static const struct ether_addr ether_null = {{0, 0, 0, 0, 0, 0}};
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/*
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* Takes a pointer, returns true if a 48-bit null address (all zeros)
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*/
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#define ETHER_ISNULLADDR(ea) ((((uint8 *)(ea))[0] | \
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((uint8 *)(ea))[1] | \
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((uint8 *)(ea))[2] | \
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((uint8 *)(ea))[3] | \
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((uint8 *)(ea))[4] | \
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((uint8 *)(ea))[5]) == 0)
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#undef PACKED
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#if !defined(__GNUC__)
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#pragma pack()
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#endif
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#endif /* _NET_ETHERNET_H_ */
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