/* p80211conv.h
*
* Ether/802.11 conversions and packet buffer routines
*
* Copyright (C) 1999 AbsoluteValue Systems, Inc.  All Rights Reserved.
* --------------------------------------------------------------------
*
* linux-wlan
*
*   The contents of this file are subject to the Mozilla Public
*   License Version 1.1 (the "License"); you may not use this file
*   except in compliance with the License. You may obtain a copy of
*   the License at http://www.mozilla.org/MPL/
*
*   Software distributed under the License is distributed on an "AS
*   IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
*   implied. See the License for the specific language governing
*   rights and limitations under the License.
*
*   Alternatively, the contents of this file may be used under the
*   terms of the GNU Public License version 2 (the "GPL"), in which
*   case the provisions of the GPL are applicable instead of the
*   above.  If you wish to allow the use of your version of this file
*   only under the terms of the GPL and not to allow others to use
*   your version of this file under the MPL, indicate your decision
*   by deleting the provisions above and replace them with the notice
*   and other provisions required by the GPL.  If you do not delete
*   the provisions above, a recipient may use your version of this
*   file under either the MPL or the GPL.
*
* --------------------------------------------------------------------
*
* Inquiries regarding the linux-wlan Open Source project can be
* made directly to:
*
* AbsoluteValue Systems Inc.
* info@linux-wlan.com
* http://www.linux-wlan.com
*
* --------------------------------------------------------------------
*
* Portions of the development of this software were funded by
* Intersil Corporation as part of PRISM(R) chipset product development.
*
* --------------------------------------------------------------------
*
* This file declares the functions, types and macros that perform
* Ethernet to/from 802.11 frame conversions.
*
* --------------------------------------------------------------------
*/

#ifndef _LINUX_P80211CONV_H
#define _LINUX_P80211CONV_H

#define WLAN_ETHADDR_LEN	6
#define WLAN_IEEE_OUI_LEN	3

#define WLAN_ETHCONV_ENCAP	1
#define WLAN_ETHCONV_8021h	3

#define WLAN_ETHHDR_LEN		14

#define P80211CAPTURE_VERSION	0x80211001

#define	P80211_FRMMETA_MAGIC	0x802110

#define P80211SKB_FRMMETA(s) \
	(((((struct p80211_frmmeta *)((s)->cb))->magic) == \
		P80211_FRMMETA_MAGIC) ? \
		((struct p80211_frmmeta *)((s)->cb)) : \
		(NULL))

#define P80211SKB_RXMETA(s) \
	(P80211SKB_FRMMETA((s)) ?  P80211SKB_FRMMETA((s))->rx : \
		((struct p80211_rxmeta *)(NULL)))

struct p80211_rxmeta {
	struct wlandevice *wlandev;

	u64 mactime;		/* Hi-rez MAC-supplied time value */
	u64 hosttime;		/* Best-rez host supplied time value */

	unsigned int rxrate;	/* Receive data rate in 100kbps */
	unsigned int priority;	/* 0-15, 0=contention, 6=CF */
	int signal;		/* An SSI, see p80211netdev.h */
	int noise;		/* An SSI, see p80211netdev.h */
	unsigned int channel;	/* Receive channel (mostly for snifs) */
	unsigned int preamble;	/* P80211ENUM_preambletype_* */
	unsigned int encoding;	/* P80211ENUM_encoding_* */

};

struct p80211_frmmeta {
	unsigned int magic;
	struct p80211_rxmeta *rx;
};

void p80211skb_free(struct wlandevice *wlandev, struct sk_buff *skb);
int p80211skb_rxmeta_attach(struct wlandevice *wlandev, struct sk_buff *skb);
void p80211skb_rxmeta_detach(struct sk_buff *skb);

/*
 * Frame capture header.  (See doc/capturefrm.txt)
 */
struct p80211_caphdr {
	u32 version;
	u32 length;
	u64 mactime;
	u64 hosttime;
	u32 phytype;
	u32 channel;
	u32 datarate;
	u32 antenna;
	u32 priority;
	u32 ssi_type;
	s32 ssi_signal;
	s32 ssi_noise;
	u32 preamble;
	u32 encoding;
};

/* buffer free method pointer type */
typedef void (*freebuf_method_t) (void *buf, int size);

struct p80211_metawep {
	void *data;
	u8 iv[4];
	u8 icv[4];
};

/* local ether header type */
struct wlan_ethhdr {
	u8 daddr[WLAN_ETHADDR_LEN];
	u8 saddr[WLAN_ETHADDR_LEN];
	u16 type;
} __packed;

/* local llc header type */
struct wlan_llc {
	u8 dsap;
	u8 ssap;
	u8 ctl;
} __packed;

/* local snap header type */
struct wlan_snap {
	u8 oui[WLAN_IEEE_OUI_LEN];
	u16 type;
} __packed;

/* Circular include trick */
struct wlandevice;

int skb_p80211_to_ether(struct wlandevice *wlandev, u32 ethconv,
			struct sk_buff *skb);
int skb_ether_to_p80211(struct wlandevice *wlandev, u32 ethconv,
			struct sk_buff *skb, union p80211_hdr *p80211_hdr,
			struct p80211_metawep *p80211_wep);

int p80211_stt_findproto(u16 proto);

#endif