1/* 2 * 802.1Q VLAN protocol definitions 3 * 4 * Copyright (C) 2010, Broadcom Corporation. All Rights Reserved. 5 * 6 * Permission to use, copy, modify, and/or distribute this software for any 7 * purpose with or without fee is hereby granted, provided that the above 8 * copyright notice and this permission notice appear in all copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 13 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION 15 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN 16 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 * 18 * $Id: vlan.h,v 9.7 2009/03/13 01:11:50 Exp $ 19 */ 20 21#ifndef _vlan_h_ 22#define _vlan_h_ 23 24#ifndef _TYPEDEFS_H_ 25#include <typedefs.h> 26#endif 27 28/* This marks the start of a packed structure section. */ 29#include <packed_section_start.h> 30 31#define VLAN_VID_MASK 0xfff /* low 12 bits are vlan id */ 32#define VLAN_CFI_SHIFT 12 /* canonical format indicator bit */ 33#define VLAN_PRI_SHIFT 13 /* user priority */ 34 35#define VLAN_PRI_MASK 7 /* 3 bits of priority */ 36 37#define VLAN_TAG_LEN 4 38#define VLAN_TAG_OFFSET (2 * ETHER_ADDR_LEN) /* offset in Ethernet II packet only */ 39 40#define VLAN_TPID 0x8100 /* VLAN ethertype/Tag Protocol ID */ 41 42struct ethervlan_header { 43 uint8 ether_dhost[ETHER_ADDR_LEN]; 44 uint8 ether_shost[ETHER_ADDR_LEN]; 45 uint16 vlan_type; /* 0x8100 */ 46 uint16 vlan_tag; /* priority, cfi and vid */ 47 uint16 ether_type; 48}; 49 50#define ETHERVLAN_HDR_LEN (ETHER_HDR_LEN + VLAN_TAG_LEN) 51 52 53/* This marks the end of a packed structure section. */ 54#include <packed_section_end.h> 55 56#define ETHERVLAN_MOVE_HDR(d, s) \ 57do { \ 58 struct ethervlan_header t; \ 59 t = *(struct ethervlan_header *)(s); \ 60 *(struct ethervlan_header *)(d) = t; \ 61} while (0) 62 63#endif /* _vlan_h_ */ 64