157 lines
5.9 KiB
C
157 lines
5.9 KiB
C
/*-
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* Copyright (c) 2001 Atsushi Onoe
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* Copyright (c) 2002, 2003 Sam Leffler, Errno Consulting
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _NET80211_IEEE80211_NODE_H_
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#define _NET80211_IEEE80211_NODE_H_
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#define IEEE80211_PSCAN_WAIT 5 /* passive scan wait */
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#define IEEE80211_TRANS_WAIT 5 /* transition wait */
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#define IEEE80211_INACT_WAIT 5 /* inactivity timer interval */
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#define IEEE80211_INACT_MAX (300/IEEE80211_INACT_WAIT)
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#define IEEE80211_NODE_HASHSIZE 32
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/* simple hash is enough for variation of macaddr */
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#define IEEE80211_NODE_HASH(addr) \
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(((u_int8_t *)(addr))[IEEE80211_ADDR_LEN - 1] % IEEE80211_NODE_HASHSIZE)
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#define IEEE80211_RATE_SIZE 8 /* 802.11 standard */
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#define IEEE80211_RATE_MAXSIZE 15 /* max rates we'll handle */
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struct ieee80211_rateset {
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u_int8_t rs_nrates;
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u_int8_t rs_rates[IEEE80211_RATE_MAXSIZE];
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};
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/*
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* Node specific information. Note that drivers are expected
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* to derive from this structure to add device-specific per-node
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* state. This is done by overriding the ic_node_* methods in
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* the ieee80211com structure.
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*/
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struct ieee80211_node {
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TAILQ_ENTRY(ieee80211_node) ni_list;
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LIST_ENTRY(ieee80211_node) ni_hash;
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u_int ni_refcnt;
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u_int ni_scangen; /* gen# for timeout scan */
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/* hardware */
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u_int32_t ni_rstamp; /* recv timestamp */
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u_int8_t ni_rssi; /* recv ssi */
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/* header */
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u_int8_t ni_macaddr[IEEE80211_ADDR_LEN];
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u_int8_t ni_bssid[IEEE80211_ADDR_LEN];
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/* beacon, probe response */
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u_int8_t ni_tstamp[8]; /* from last rcv'd beacon */
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u_int16_t ni_intval; /* beacon interval */
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u_int16_t ni_capinfo; /* capabilities */
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u_int8_t ni_esslen;
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u_int8_t ni_essid[IEEE80211_NWID_LEN];
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struct ieee80211_rateset ni_rates; /* negotiated rate set */
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u_int8_t *ni_country; /* country information XXX */
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struct ieee80211_channel *ni_chan;
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u_int16_t ni_fhdwell; /* FH only */
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u_int8_t ni_fhindex; /* FH only */
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u_int8_t ni_erp; /* 11g only */
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#ifdef notyet
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/* DTIM and contention free period (CFP) */
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u_int8_t ni_dtimperiod;
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u_int8_t ni_cfpperiod; /* # of DTIMs between CFPs */
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u_int16_t ni_cfpduremain; /* remaining cfp duration */
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u_int16_t ni_cfpmaxduration;/* max CFP duration in TU */
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u_int16_t ni_nextdtim; /* time to next DTIM */
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u_int16_t ni_timoffset;
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#endif
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/* others */
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u_int16_t ni_associd; /* assoc response */
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u_int16_t ni_txseq; /* seq to be transmitted */
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u_int16_t ni_rxseq; /* seq previous received */
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int ni_fails; /* failure count to associate */
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int ni_inact; /* inactivity mark count */
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int ni_txrate; /* index to ni_rates[] */
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};
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static __inline struct ieee80211_node *
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ieee80211_ref_node(struct ieee80211_node *ni)
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{
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atomic_add_int(&ni->ni_refcnt, 1);
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return ni;
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}
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static __inline void
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ieee80211_unref_node(struct ieee80211_node **ni)
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{
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atomic_subtract_int(&(*ni)->ni_refcnt, 1);
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*ni = NULL; /* guard against use */
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}
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#define IEEE80211_NODE_LOCK_INIT(_ic, _name) \
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mtx_init(&(_ic)->ic_nodelock, _name, "802.11 node table", MTX_DEF)
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#define IEEE80211_NODE_LOCK_DESTROY(_ic) mtx_destroy(&(_ic)->ic_nodelock)
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#define IEEE80211_NODE_LOCK(_ic) mtx_lock(&(_ic)->ic_nodelock)
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#define IEEE80211_NODE_UNLOCK(_ic) mtx_unlock(&(_ic)->ic_nodelock)
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#define IEEE80211_NODE_LOCK_ASSERT(_ic) \
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mtx_assert(&(_ic)->ic_nodelock, MA_OWNED)
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struct ieee80211com;
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extern void ieee80211_node_attach(struct ifnet *);
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extern void ieee80211_node_lateattach(struct ifnet *);
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extern void ieee80211_node_detach(struct ifnet *);
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extern void ieee80211_begin_scan(struct ifnet *);
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extern void ieee80211_next_scan(struct ifnet *);
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extern void ieee80211_end_scan(struct ifnet *);
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extern struct ieee80211_node *ieee80211_alloc_node(struct ieee80211com *,
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u_int8_t *);
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extern struct ieee80211_node *ieee80211_dup_bss(struct ieee80211com *,
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u_int8_t *);
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extern struct ieee80211_node *ieee80211_find_node(struct ieee80211com *,
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u_int8_t *);
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extern struct ieee80211_node * ieee80211_lookup_node(struct ieee80211com *,
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u_int8_t *macaddr, struct ieee80211_channel *);
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extern void ieee80211_free_node(struct ieee80211com *,
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struct ieee80211_node *);
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extern void ieee80211_free_allnodes(struct ieee80211com *);
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typedef void ieee80211_iter_func(void *, struct ieee80211_node *);
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extern void ieee80211_iterate_nodes(struct ieee80211com *ic,
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ieee80211_iter_func *, void *);
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extern void ieee80211_timeout_nodes(struct ieee80211com *);
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extern void ieee80211_create_ibss(struct ieee80211com* ,
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struct ieee80211_channel *);
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#endif /* _NET80211_IEEE80211_NODE_H_ */
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