/*
 * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*
 * Copyright (c) 2007 Sam Leffler, Errno Consulting
 * 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 AUTHOR ``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 THE AUTHOR 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.
 */

#ifndef _SYS_NET80211_HT_H
#define	_SYS_NET80211_HT_H

/*
 * 802.11n protocol implementation definitions.
 */

#ifdef	__cplusplus
extern "C" {
#endif

struct ieee80211com;
struct ieee80211_node;
struct ieee80211_channel;

#define	IEEE80211_AGGR_BAWMAX	64	/* max block ack window size */
/* threshold for aging overlapping non-HT bss */
#define	IEEE80211_NONHT_PRESENT_AGE	(60*1000)	/* msec */

#define	M_AMPDU			0x8000	/* A-MPDU processing done */
#define	M_WEP			0x4000	/* WEP done by hardware */
#define	M_80211_RX		(M_AMPDU | M_WEP)

typedef uint16_t ieee80211_seq;

struct ieee80211_tx_ampdu {
	ushort_t	txa_flags;
#define	IEEE80211_AGGR_IMMEDIATE	0x0001	/* BA policy */
#define	IEEE80211_AGGR_XCHGPEND		0x0002	/* ADDBA response pending */
#define	IEEE80211_AGGR_RUNNING		0x0004	/* ADDBA response received */
#define	IEEE80211_AGGR_SETUP		0x0008	/* deferred state setup */
#define	IEEE80211_AGGR_NAK		0x0010	/* peer NAK'd ADDBA request */
	uint8_t		txa_ac;
	uint8_t		txa_token;		/* dialog token */
	int		txa_qbytes;		/* data queued (bytes) */
	short		txa_qframes;		/* data queued (frames) */
	ieee80211_seq	txa_seqstart;
	ieee80211_seq	txa_start;
	uint16_t	txa_wnd;		/* BA window size */
	uint8_t		txa_attempts;		/* # setup attempts */
	clock_t		txa_lastrequest;	/* time of last ADDBA request */
	timeout_id_t	txa_timer;
};

/* return non-zero if AMPDU tx for the TID is running */
#define	IEEE80211_AMPDU_RUNNING(tap) \
	(((tap)->txa_flags & IEEE80211_AGGR_RUNNING) != 0)

/* return non-zero if AMPDU tx for the TID is running or started */
#define	IEEE80211_AMPDU_REQUESTED(tap) \
	(((tap)->txa_flags & (IEEE80211_AGGR_RUNNING |	\
	IEEE80211_AGGR_XCHGPEND | IEEE80211_AGGR_NAK)) != 0)

struct ieee80211_rx_ampdu {
	int		rxa_flags;
	int		rxa_qbytes;	/* data queued (bytes) */
	short		rxa_qframes;	/* data queued (frames) */
	ieee80211_seq	rxa_seqstart;
	ieee80211_seq	rxa_start;	/* start of current BA window */
	uint16_t	rxa_wnd;	/* BA window size */
	clock_t		rxa_age;	/* age of oldest frame in window */
	int		rxa_nframes;	/* frames since ADDBA */
	mblk_t		*rxa_m[IEEE80211_AGGR_BAWMAX];
};

void ieee80211_ht_attach(struct ieee80211com *);
void ieee80211_ht_detach(struct ieee80211com *);

void ieee80211_ht_announce(struct ieee80211com *);

extern const int ieee80211_htrates[16];
const struct ieee80211_htrateset *ieee80211_get_suphtrates(
    struct ieee80211com *, const struct ieee80211_channel *);

int ieee80211_setup_htrates(struct ieee80211_node *,
    const uint8_t *htcap, int flags);
void ieee80211_setup_basic_htrates(struct ieee80211_node *,
    const uint8_t *htinfo);

mblk_t *ieee80211_decap_amsdu(struct ieee80211_node *, mblk_t *);

int ieee80211_ampdu_reorder(struct ieee80211_node *, mblk_t *);
void ieee80211_recv_bar(struct ieee80211_node *, mblk_t *);
void ieee80211_ht_node_init(struct ieee80211_node *, const uint8_t *);
void ieee80211_ht_node_cleanup(struct ieee80211_node *);
struct ieee80211_channel *ieee80211_ht_adjust_channel(struct ieee80211com *,
    struct ieee80211_channel *, int);

void ieee80211_ht_wds_init(struct ieee80211_node *);
void ieee80211_ht_node_join(struct ieee80211_node *);
void ieee80211_ht_node_leave(struct ieee80211_node *);
void ieee80211_htinfo_update(struct ieee80211com *, int protmode);
void ieee80211_ht_timeout(struct ieee80211com *);
void ieee80211_parse_htcap(struct ieee80211_node *, const uint8_t *);
void ieee80211_parse_htinfo(struct ieee80211_node *, const uint8_t *);
void ieee80211_recv_action(struct ieee80211_node *,
    const uint8_t *, const uint8_t *);
int ieee80211_ampdu_request(struct ieee80211_node *,
    struct ieee80211_tx_ampdu *);
void ieee80211_ampdu_stop(struct ieee80211_node *,
    struct ieee80211_tx_ampdu *);
int ieee80211_send_bar(struct ieee80211_node *,
    const struct ieee80211_tx_ampdu *);
int ieee80211_send_action(struct ieee80211_node *, int, int, uint16_t [4]);

uint8_t	*ieee80211_add_htcap(uint8_t *, struct ieee80211_node *);
uint8_t	*ieee80211_add_htcap_vendor(uint8_t *, struct ieee80211_node *);
uint8_t	*ieee80211_add_htinfo(uint8_t *, struct ieee80211_node *);
uint8_t	*ieee80211_add_htinfo_vendor(uint8_t *, struct ieee80211_node *);

struct ieee80211_beacon_offsets;
void ieee80211_ht_update_beacon(struct ieee80211com *,
    struct ieee80211_beacon_offsets *);

#ifdef	__cplusplus
}
#endif

#endif /* _SYS_NET80211_HT_H */