1/*-
2 * Copyright (c) 2007-2009 Sam Leffler, Errno Consulting
3 * Copyright (c) 2007-2009 Intel Corporation
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 *
26 * $FreeBSD$
27 */
28#ifndef _NET80211_IEEE80211_TDMA_H_
29#define _NET80211_IEEE80211_TDMA_H_
30
31/*
32 * TDMA-mode implementation definitions.
33 */
34
35#define	TDMA_SUBTYPE_PARAM	0x01
36#define	TDMA_VERSION_V2		2
37#define	TDMA_VERSION		TDMA_VERSION_V2
38
39/* NB: we only support 2 right now but protocol handles up to 8 */
40#define	TDMA_MAXSLOTS		2	/* max slots/sta's */
41
42#define	TDMA_PARAM_LEN_V2	sizeof(struct ieee80211_tdma_param)
43
44/*
45 * TDMA information element.
46 */
47struct ieee80211_tdma_param {
48	u_int8_t	tdma_id;	/* IEEE80211_ELEMID_VENDOR */
49	u_int8_t	tdma_len;
50	u_int8_t	tdma_oui[3];	/* TDMA_OUI */
51	u_int8_t	tdma_type;	/* TDMA_OUI_TYPE */
52	u_int8_t	tdma_subtype;	/* TDMA_SUBTYPE_PARAM */
53	u_int8_t	tdma_version;	/* spec revision */
54	u_int8_t	tdma_slot;	/* station slot # [0..7] */
55	u_int8_t	tdma_slotcnt;	/* bss slot count [1..8] */
56	u_int16_t	tdma_slotlen;	/* bss slot len (100us) */
57	u_int8_t	tdma_bintval;	/* beacon interval (superframes) */
58	u_int8_t	tdma_inuse[1];	/* slot occupancy map */
59	u_int8_t	tdma_pad[2];
60	u_int8_t	tdma_tstamp[8];	/* timestamp from last beacon */
61} __packed;
62
63#ifdef _KERNEL
64/*
65 * Implementation state.
66 */
67struct ieee80211_tdma_state {
68	u_int	tdma_slotlen;		/* bss slot length (us) */
69	uint8_t	tdma_version;		/* protocol version to use */
70	uint8_t	tdma_slotcnt;		/* bss slot count */
71	uint8_t	tdma_bintval;		/* beacon interval (slots) */
72	uint8_t	tdma_slot;		/* station slot # */
73	uint8_t	tdma_inuse[1];		/* mask of slots in use */
74	uint8_t	tdma_active[1];		/* mask of active slots */
75	int	tdma_count;		/* active/inuse countdown */
76	void	*tdma_peer;		/* peer station cookie */
77	struct timeval tdma_lastprint;	/* time of last rate-limited printf */
78	int	tdma_fails;		/* fail count for rate-limiting */
79
80	/* parent method pointers */
81	int	(*tdma_newstate)(struct ieee80211vap *, enum ieee80211_state,
82		    int arg);
83	void	(*tdma_recv_mgmt)(struct ieee80211_node *,
84		    struct mbuf *, int, int, int);
85	void	(*tdma_opdetach)(struct ieee80211vap *);
86};
87
88#define	TDMA_UPDATE_SLOT	0x0001	/* tdma_slot changed */
89#define	TDMA_UPDATE_SLOTCNT	0x0002	/* tdma_slotcnt changed */
90#define	TDMA_UPDATE_SLOTLEN	0x0004	/* tdma_slotlen changed */
91#define	TDMA_UPDATE_BINTVAL	0x0008	/* tdma_bintval changed */
92
93void	ieee80211_tdma_vattach(struct ieee80211vap *);
94
95int	ieee80211_tdma_getslot(struct ieee80211vap *vap);
96void	ieee80211_parse_tdma(struct ieee80211_node *ni, const uint8_t *ie);
97uint8_t *ieee80211_add_tdma(uint8_t *frm, struct ieee80211vap *vap);
98struct ieee80211_beacon_offsets;
99void	ieee80211_tdma_update_beacon(struct ieee80211vap *vap,
100	    struct ieee80211_beacon_offsets *bo);
101#endif /* _KERNEL */
102#endif /* !_NET80211_IEEE80211_TDMA_H_ */
103