core/hdd/inc/wlan_hdd_ether.h

/*
 * Copyright (c) 2014, 2017 The Linux Foundation. All rights reserved.
 *
 * Permission to use, copy, modify, and/or distribute this software for
 * any purpose with or without fee is hereby granted, provided that the
 * above copyright notice and this permission notice appear in all
 * copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
 * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
 * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 * PERFORMANCE OF THIS SOFTWARE.
 */

#ifndef _WLAN_HDD_ETHER_H
#define _WLAN_HDD_ETHER_H
/**
 * DOC: wlan_hdd_ether.h
 *
 * This module describes Ethernet packet formats for processing by HDD.
 */

/*
 * Include Files
 */
#include <linux/version.h>
#include <linux/byteorder/generic.h>
#include <linux/if_ether.h>
#include <linux/if_vlan.h>

/*
 * Preprocessor Definitions and Constants
 */
#define WLAN_SNAP_OUI_LEN 3
#define WLAN_SNAP_DSAP 0xAAU
#define WLAN_SNAP_SSAP 0xAAU
#define WLAN_SNAP_CTRL 0x03
#define WLAN_MIN_PROTO 0x0600

/*
 * Type Declarations
 */
struct wlan_snap_hdr {
	unsigned char dsap;
	unsigned char ssap;
	unsigned char ctrl;
	unsigned char oui[WLAN_SNAP_OUI_LEN];
} __packed;

struct wlan_8023 {
	unsigned char h_dest[ETH_ALEN];
	unsigned char h_source[ETH_ALEN];
	__be16 h_len;
	struct wlan_snap_hdr h_snap;
	__be16 h_proto;
} __packed;

struct wlan_8023_vlan {
	unsigned char h_dest[ETH_ALEN];
	unsigned char h_source[ETH_ALEN];
	__be16 h_vlan_proto;
	__be16 h_vlan_TCI;
	__be16 h_len;
	struct wlan_snap_hdr h_snap;
	__be16 h_proto;
} __packed;

union generic_ethhdr {
	struct ethhdr eth_II;
	struct vlan_ethhdr eth_IIv;
	struct wlan_8023 eth_8023;
	struct wlan_8023_vlan eth_8023v;
};

#endif /* #ifndef _WLAN_HDD_ETHER_H */