1/*
2 * 802.1Q VLAN protocol definitions
3 *
4 * Copyright (C) 2013, 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 352279 2012-08-22 07:21:57Z $
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#ifndef	 VLAN_VID_MASK
32#define VLAN_VID_MASK		0xfff	/* low 12 bits are vlan id */
33#endif
34
35#define	VLAN_CFI_SHIFT		12	/* canonical format indicator bit */
36#define VLAN_PRI_SHIFT		13	/* user priority */
37
38#define VLAN_PRI_MASK		7	/* 3 bits of priority */
39
40#define	VLAN_TPID_OFFSET	12	/* offset of tag protocol id field */
41#define	VLAN_TCI_OFFSET		14	/* offset of tag ctrl info field */
42
43#define	VLAN_TAG_LEN		4
44#define	VLAN_TAG_OFFSET		(2 * ETHER_ADDR_LEN)	/* offset in Ethernet II packet only */
45
46#define VLAN_TPID		0x8100	/* VLAN ethertype/Tag Protocol ID */
47
48struct vlan_header {
49	uint16	vlan_type;		/* 0x8100 */
50	uint16	vlan_tag;		/* priority, cfi and vid */
51};
52
53struct ethervlan_header {
54	uint8	ether_dhost[ETHER_ADDR_LEN];
55	uint8	ether_shost[ETHER_ADDR_LEN];
56	uint16	vlan_type;		/* 0x8100 */
57	uint16	vlan_tag;		/* priority, cfi and vid */
58	uint16	ether_type;
59};
60
61struct dot3_mac_llc_snapvlan_header {
62	uint8	ether_dhost[ETHER_ADDR_LEN];	/* dest mac */
63	uint8	ether_shost[ETHER_ADDR_LEN];	/* src mac */
64	uint16	length;				/* frame length incl header */
65	uint8	dsap;				/* always 0xAA */
66	uint8	ssap;				/* always 0xAA */
67	uint8	ctl;				/* always 0x03 */
68	uint8	oui[3];				/* RFC1042: 0x00 0x00 0x00
69						 * Bridge-Tunnel: 0x00 0x00 0xF8
70						 */
71	uint16	vlan_type;			/* 0x8100 */
72	uint16	vlan_tag;			/* priority, cfi and vid */
73	uint16	ether_type;			/* ethertype */
74};
75
76#define	ETHERVLAN_HDR_LEN	(ETHER_HDR_LEN + VLAN_TAG_LEN)
77
78
79/* This marks the end of a packed structure section. */
80#include <packed_section_end.h>
81
82#define ETHERVLAN_MOVE_HDR(d, s) \
83do { \
84	struct ethervlan_header t; \
85	t = *(struct ethervlan_header *)(s); \
86	*(struct ethervlan_header *)(d) = t; \
87} while (0)
88
89#endif /* _vlan_h_ */
90