1/*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2007-2009 Sam Leffler, Errno Consulting
5 * Copyright (c) 2007-2009 Intel Corporation
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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,
85 const struct ieee80211_rx_stats *rxs, int, int);
86 void (*tdma_opdetach)(struct ieee80211vap *);
87};
88
89#define TDMA_UPDATE_SLOT 0x0001 /* tdma_slot changed */
90#define TDMA_UPDATE_SLOTCNT 0x0002 /* tdma_slotcnt changed */
91#define TDMA_UPDATE_SLOTLEN 0x0004 /* tdma_slotlen changed */
92#define TDMA_UPDATE_BINTVAL 0x0008 /* tdma_bintval changed */
93
94void ieee80211_tdma_vattach(struct ieee80211vap *);
95
96int ieee80211_tdma_getslot(struct ieee80211vap *vap);
97void ieee80211_parse_tdma(struct ieee80211_node *ni, const uint8_t *ie);
98uint8_t *ieee80211_add_tdma(uint8_t *frm, struct ieee80211vap *vap);
99struct ieee80211_beacon_offsets;
100void ieee80211_tdma_update_beacon(struct ieee80211vap *vap,
101 struct ieee80211_beacon_offsets *bo);
102#endif /* _KERNEL */
103#endif /* !_NET80211_IEEE80211_TDMA_H_ */