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/* Copyright (C) 2007-2022 Open Information Security Foundation
*
* You can copy, redistribute or modify this Program under the terms of
* the GNU General Public License version 2 as published by the Free
* Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* version 2 along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
/**
* \file
*
* \author Breno Silva <breno.silva@gmail.com>
*/
#ifndef __DECODE_VLAN_H__
#define __DECODE_VLAN_H__
/* return vlan id in host byte order */
uint16_t DecodeVLANGetId(const struct Packet_ *, uint8_t layer);
/** Vlan type */
#define ETHERNET_TYPE_VLAN 0x8100
/** Vlan macros to access Vlan priority, Vlan CFI and VID */
#define GET_VLAN_PRIORITY(vlanh) ((SCNtohs((vlanh)->vlan_cfi) & 0xe000) >> 13)
#define GET_VLAN_CFI(vlanh) ((SCNtohs((vlanh)->vlan_cfi) & 0x0100) >> 12)
#define GET_VLAN_ID(vlanh) ((uint16_t)(SCNtohs((vlanh)->vlan_cfi) & 0x0FFF))
#define GET_VLAN_PROTO(vlanh) ((SCNtohs((vlanh)->protocol)))
/** Vlan header struct */
typedef struct VLANHdr_ {
uint16_t vlan_cfi;
uint16_t protocol; /**< protocol field */
} __attribute__((__packed__)) VLANHdr;
/** VLAN header length */
#define VLAN_HEADER_LEN 4
void DecodeVLANRegisterTests(void);
/** VLAN max encapsulation layer count/index */
#define VLAN_MAX_LAYERS 3
#define VLAN_MAX_LAYER_IDX (VLAN_MAX_LAYERS - 1)
#endif /* __DECODE_VLAN_H__ */
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