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/*
* 802.1Q VLAN protocol definitions
*
* Copyright 2007, 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.
*
* $Id$
*/
#ifndef _vlan_h_
#define _vlan_h_
/* enable structure packing */
#if defined(__GNUC__)
#define PACKED __attribute__((packed))
#else
#pragma pack(1)
#define PACKED
#endif
#define VLAN_VID_MASK 0xfff /* low 12 bits are vlan id */
#define VLAN_CFI_SHIFT 12 /* canonical format indicator bit */
#define VLAN_PRI_SHIFT 13 /* user priority */
#define VLAN_PRI_MASK 7 /* 3 bits of priority */
#define VLAN_TAG_LEN 4
#define VLAN_TAG_OFFSET (2 * ETHER_ADDR_LEN) /* offset in Ethernet II packet only */
#define VLAN_TPID 0x8100 /* VLAN ethertype/Tag Protocol ID */
struct ethervlan_header {
uint8 ether_dhost[ETHER_ADDR_LEN];
uint8 ether_shost[ETHER_ADDR_LEN];
uint16 vlan_type; /* 0x8100 */
uint16 vlan_tag; /* priority, cfi and vid */
uint16 ether_type;
};
#define ETHERVLAN_HDR_LEN (ETHER_HDR_LEN + VLAN_TAG_LEN)
#undef PACKED
#if !defined(__GNUC__)
#pragma pack()
#endif
#endif /* _vlan_h_ */
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