ieee80211_tdma.h

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/*-
 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
 *
 * Copyright (c) 2007-2009 Sam Leffler, Errno Consulting
 * Copyright (c) 2007-2009 Intel Corporation
 * 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.
 *
 * $FreeBSD$
 */
#ifndef _NET80211_IEEE80211_TDMA_H_
#define _NET80211_IEEE80211_TDMA_H_
 
/*
 * TDMA-mode implementation definitions.
 */
 
#define TDMA_SUBTYPE_PARAM      0x01
#define TDMA_VERSION_V2         2
#define TDMA_VERSION            TDMA_VERSION_V2
 
/* NB: we only support 2 right now but protocol handles up to 8 */
#define TDMA_MAXSLOTS           2       /* max slots/sta's */
 
#define TDMA_PARAM_LEN_V2       sizeof(struct ieee80211_tdma_param)
 
/*
 * TDMA information element.
 */
struct ieee80211_tdma_param {
        u_int8_t        tdma_id;        /* IEEE80211_ELEMID_VENDOR */
        u_int8_t        tdma_len;
        u_int8_t        tdma_oui[3];    /* TDMA_OUI */
        u_int8_t        tdma_type;      /* TDMA_OUI_TYPE */
        u_int8_t        tdma_subtype;   /* TDMA_SUBTYPE_PARAM */
        u_int8_t        tdma_version;   /* spec revision */
        u_int8_t        tdma_slot;      /* station slot # [0..7] */
        u_int8_t        tdma_slotcnt;   /* bss slot count [1..8] */
        u_int16_t       tdma_slotlen;   /* bss slot len (100us) */
        u_int8_t        tdma_bintval;   /* beacon interval (superframes) */
        u_int8_t        tdma_inuse[1];  /* slot occupancy map */
        u_int8_t        tdma_pad[2];
        u_int8_t        tdma_tstamp[8]; /* timestamp from last beacon */
} __packed;
 
#ifdef _KERNEL
/*
 * Implementation state.
 */
struct ieee80211_tdma_state {
        u_int   tdma_slotlen;           /* bss slot length (us) */
        uint8_t tdma_version;           /* protocol version to use */
        uint8_t tdma_slotcnt;           /* bss slot count */
        uint8_t tdma_bintval;           /* beacon interval (slots) */
        uint8_t tdma_slot;              /* station slot # */
        uint8_t tdma_inuse[1];          /* mask of slots in use */
        uint8_t tdma_active[1];         /* mask of active slots */
        int     tdma_count;             /* active/inuse countdown */
        void    *tdma_peer;             /* peer station cookie */
        struct timeval tdma_lastprint;  /* time of last rate-limited printf */
        int     tdma_fails;             /* fail count for rate-limiting */
 
        /* parent method pointers */
        int     (*tdma_newstate)(struct ieee80211vap *, enum ieee80211_state,
                    int arg);
        void    (*tdma_recv_mgmt)(struct ieee80211_node *,
                    struct mbuf *, int,
                    const struct ieee80211_rx_stats *rxs, int, int);
        void    (*tdma_opdetach)(struct ieee80211vap *);
};
 
#define TDMA_UPDATE_SLOT        0x0001  /* tdma_slot changed */
#define TDMA_UPDATE_SLOTCNT     0x0002  /* tdma_slotcnt changed */
#define TDMA_UPDATE_SLOTLEN     0x0004  /* tdma_slotlen changed */
#define TDMA_UPDATE_BINTVAL     0x0008  /* tdma_bintval changed */
 
void    ieee80211_tdma_vattach(struct ieee80211vap *);
 
int     ieee80211_tdma_getslot(struct ieee80211vap *vap);
void    ieee80211_parse_tdma(struct ieee80211_node *ni, const uint8_t *ie);
uint8_t *ieee80211_add_tdma(uint8_t *frm, struct ieee80211vap *vap);
struct ieee80211_beacon_offsets;
void    ieee80211_tdma_update_beacon(struct ieee80211vap *vap,
            struct ieee80211_beacon_offsets *bo);
#endif /* _KERNEL */
#endif /* !_NET80211_IEEE80211_TDMA_H_ */