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Diffstat (limited to 'target/linux/package/openwrt/include/proto/ethernet.h')
| -rw-r--r-- | target/linux/package/openwrt/include/proto/ethernet.h | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/target/linux/package/openwrt/include/proto/ethernet.h b/target/linux/package/openwrt/include/proto/ethernet.h new file mode 100644 index 000000000..173464af6 --- /dev/null +++ b/target/linux/package/openwrt/include/proto/ethernet.h @@ -0,0 +1,179 @@ +/******************************************************************************* + * $Id$ + * Copyright 2004, 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. + * From FreeBSD 2.2.7: Fundamental constants relating to ethernet. + ******************************************************************************/ + +#ifndef _NET_ETHERNET_H_ /* use native BSD ethernet.h when available */ +#define _NET_ETHERNET_H_ + +#ifndef _TYPEDEFS_H_ +#include "typedefs.h" +#endif + +#if defined(__GNUC__) +#define PACKED __attribute__((packed)) +#else +#define PACKED +#endif + +/* + * The number of bytes in an ethernet (MAC) address. + */ +#ifndef ETHER_ADDR_LEN +#define ETHER_ADDR_LEN 6 +#endif + +/* + * The number of bytes in the type field. + */ +#ifndef ETHER_TYPE_LEN +#define ETHER_TYPE_LEN 2 +#endif + +/* + * The number of bytes in the trailing CRC field. + */ +#ifndef ETHER_CRC_LEN +#define ETHER_CRC_LEN 4 +#endif + +/* + * The length of the combined header. + */ +#ifndef ETHER_HDR_LEN +#define ETHER_HDR_LEN (ETHER_ADDR_LEN*2+ETHER_TYPE_LEN) +#endif + +/* + * The minimum packet length. + */ +#ifndef ETHER_MIN_LEN +#define ETHER_MIN_LEN 64 +#endif + +/* + * The minimum packet user data length. + */ +#ifndef ETHER_MIN_DATA +#define ETHER_MIN_DATA 46 +#endif + +/* + * The maximum packet length. + */ +#ifndef ETHER_MAX_LEN +#define ETHER_MAX_LEN 1518 +#endif + +/* + * The maximum packet user data length. + */ +#define ETHER_MAX_DATA 1500 + +/* + * Used to uniquely identify a 802.1q VLAN-tagged header. + */ +#define VLAN_TAG 0x8100 + +/* + * Located after dest & src address in ether header. + */ +#define VLAN_FIELDS_OFFSET (ETHER_ADDR_LEN * 2) + +/* + * 4 bytes of vlan field info. + */ +#define VLAN_FIELDS_SIZE 4 + +/* location of bits in 16-bit vlan fields */ +#define VLAN_PRI_SHIFT 13 /* user priority */ +#define VLAN_CFI_SHIFT 12 /* canonical format indicator bit */ + +/* 3 bits of priority */ +#define VLAN_PRI_MASK 7 +/* 12 bits of vlan identfier (VID) */ +#define VLAN_VID_MASK 0xFFF /* VLAN identifier (VID) field */ + +struct vlan_tags { + uint16 tag_type; /* 0x8100 for VLAN */ + uint16 tag_control; /* prio | cfi | vid */ +} PACKED ; + +/* 802.1X ethertype */ + +#define ETHER_TYPE_IP 0x0800 /* IP */ +#define ETHER_TYPE_BRCM 0x886c /* Broadcom Corp. */ +#define ETHER_TYPE_802_1X 0x888e /* 802.1x */ + +#define ETHER_BRCM_SUBTYPE_LEN 4 /* Broadcom 4byte subtype follows ethertype */ +#define ETHER_BRCM_CRAM 0x1 /* Broadcom subtype cram protocol */ + +/* + * A macro to validate a length with + */ +#define ETHER_IS_VALID_LEN(foo) \ + ((foo) >= ETHER_MIN_LEN && (foo) <= ETHER_MAX_LEN) + +#ifndef __NET_ETHERNET_H +#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 +#endif + +/* + * 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) + +/* + * 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) + +/* Differentiated Services Codepoint - lower 6 bits of tos in iphdr */ +#define DSCP_PRI_MASK 0x3F /* bits 0-6 */ +#define DSCP_WME_PRI_MASK 0x38 /* bits 3-6 */ +#define DSCP_WME_PRI_SHIFT 3 + +#undef PACKED + +#endif /* _NET_ETHERNET_H_ */ |