include/proto/vlan.h

/*
 * 802.1Q VLAN protocol definitions
 *
 * Copyright 1999-2016, Broadcom Corporation
 * All rights reserved,
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *    1. Redistributions of source code must retain the above copyright notice,
 *       this list of conditions and the following disclaimer.
 *    2. Redistributions in binary form must reproduce the above copyright notice,
 *       this list of conditions and the following disclaimer in the documentation
 *       and/or other materials provided with the distribution.
 *
 * This software is provided by the copyright holder "as is" and any express or
 * implied warranties, including, but not limited to, the implied warranties of
 * merchantability and fitness for a particular purpose are disclaimed. In no event
 * shall copyright holder be liable for any direct, indirect, incidental, special,
 * exemplary, or consequential damages (including, but not limited to, procurement
 * of substitute goods or services; loss of use, data, or profits; or business
 * interruption) however caused and on any theory of liability, whether in
 * contract, strict liability, or tort (including negligence or otherwise) arising
 * in any way out of the use of this software, even if advised of the possibility
 * of such damage
 *
 *
 * <<Broadcom-WL-IPTag/Open:>>
 *
 * $Id: vlan.h 518342 2014-12-01 23:21:41Z $
 */

#ifndef _vlan_h_
#define _vlan_h_

#ifndef _TYPEDEFS_H_
#include <typedefs.h>
#endif

/* This marks the start of a packed structure section. */
#include <packed_section_start.h>

#ifndef	 VLAN_VID_MASK
#define VLAN_VID_MASK		0xfff	/* low 12 bits are vlan id */
#endif

#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_TPID_OFFSET	12	/* offset of tag protocol id field */
#define	VLAN_TCI_OFFSET		14	/* offset of tag ctrl info field */

#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 vlan_header {
	uint16	vlan_type;		/* 0x8100 */
	uint16	vlan_tag;		/* priority, cfi and vid */
};

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;
};

struct dot3_mac_llc_snapvlan_header {
	uint8	ether_dhost[ETHER_ADDR_LEN];	/* dest mac */
	uint8	ether_shost[ETHER_ADDR_LEN];	/* src mac */
	uint16	length;				/* frame length incl header */
	uint8	dsap;				/* always 0xAA */
	uint8	ssap;				/* always 0xAA */
	uint8	ctl;				/* always 0x03 */
	uint8	oui[3];				/* RFC1042: 0x00 0x00 0x00
						 * Bridge-Tunnel: 0x00 0x00 0xF8
						 */
	uint16	vlan_type;			/* 0x8100 */
	uint16	vlan_tag;			/* priority, cfi and vid */
	uint16	ether_type;			/* ethertype */
};

#define	ETHERVLAN_HDR_LEN	(ETHER_HDR_LEN + VLAN_TAG_LEN)


/* This marks the end of a packed structure section. */
#include <packed_section_end.h>

#define ETHERVLAN_MOVE_HDR(d, s) \
do { \
	struct ethervlan_header t; \
	t = *(struct ethervlan_header *)(s); \
	*(struct ethervlan_header *)(d) = t; \
} while (0)

#endif /* _vlan_h_ */