1 /*- 2 * Copyright (c) 2001 Atsushi Onoe 3 * Copyright (c) 2002, 2003 Sam Leffler, Errno Consulting 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 * 3. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission. 16 * 17 * Alternatively, this software may be distributed under the terms of the 18 * GNU General Public License ("GPL") version 2 as published by the Free 19 * Software Foundation. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 * 32 * $FreeBSD$ 33 */ 34 #ifndef _NET80211_IEEE80211_NODE_H_ 35 #define _NET80211_IEEE80211_NODE_H_ 36 37 #define IEEE80211_PSCAN_WAIT 5 /* passive scan wait */ 38 #define IEEE80211_TRANS_WAIT 5 /* transition wait */ 39 #define IEEE80211_INACT_WAIT 5 /* inactivity timer interval */ 40 #define IEEE80211_INACT_MAX (300/IEEE80211_INACT_WAIT) 41 42 #define IEEE80211_NODE_HASHSIZE 32 43 /* simple hash is enough for variation of macaddr */ 44 #define IEEE80211_NODE_HASH(addr) \ 45 (((u_int8_t *)(addr))[IEEE80211_ADDR_LEN - 1] % IEEE80211_NODE_HASHSIZE) 46 47 #define IEEE80211_RATE_SIZE 8 /* 802.11 standard */ 48 #define IEEE80211_RATE_MAXSIZE 15 /* max rates we'll handle */ 49 50 struct ieee80211_rateset { 51 u_int8_t rs_nrates; 52 u_int8_t rs_rates[IEEE80211_RATE_MAXSIZE]; 53 }; 54 55 /* 56 * Node specific information. Note that drivers are expected 57 * to derive from this structure to add device-specific per-node 58 * state. This is done by overriding the ic_node_* methods in 59 * the ieee80211com structure. 60 */ 61 struct ieee80211_node { 62 TAILQ_ENTRY(ieee80211_node) ni_list; 63 LIST_ENTRY(ieee80211_node) ni_hash; 64 u_int ni_refcnt; 65 66 /* hardware */ 67 u_int32_t ni_rstamp; /* recv timestamp */ 68 u_int8_t ni_rssi; /* recv ssi */ 69 70 /* header */ 71 u_int8_t ni_macaddr[IEEE80211_ADDR_LEN]; 72 u_int8_t ni_bssid[IEEE80211_ADDR_LEN]; 73 74 /* beacon, probe response */ 75 u_int8_t ni_tstamp[8]; /* from last rcv'd beacon */ 76 u_int16_t ni_intval; /* beacon interval */ 77 u_int16_t ni_capinfo; /* capabilities */ 78 u_int8_t ni_esslen; 79 u_int8_t ni_essid[IEEE80211_NWID_LEN]; 80 struct ieee80211_rateset ni_rates; /* negotiated rate set */ 81 u_int8_t *ni_country; /* country information XXX */ 82 struct ieee80211_channel *ni_chan; 83 u_int16_t ni_fhdwell; /* FH only */ 84 u_int8_t ni_fhindex; /* FH only */ 85 u_int8_t ni_erp; /* 11g only */ 86 87 #ifdef notyet 88 /* DTIM and contention free period (CFP) */ 89 u_int8_t ni_dtimperiod; 90 u_int8_t ni_cfpperiod; /* # of DTIMs between CFPs */ 91 u_int16_t ni_cfpduremain; /* remaining cfp duration */ 92 u_int16_t ni_cfpmaxduration;/* max CFP duration in TU */ 93 u_int16_t ni_nextdtim; /* time to next DTIM */ 94 u_int16_t ni_timoffset; 95 #endif 96 97 /* others */ 98 u_int16_t ni_associd; /* assoc response */ 99 u_int16_t ni_txseq; /* seq to be transmitted */ 100 u_int16_t ni_rxseq; /* seq previous received */ 101 int ni_fails; /* failure count to associate */ 102 int ni_inact; /* inactivity mark count */ 103 int ni_txrate; /* index to ni_rates[] */ 104 }; 105 106 static __inline struct ieee80211_node * 107 ieee80211_ref_node(struct ieee80211_node *ni) 108 { 109 atomic_add_int(&ni->ni_refcnt, 1); 110 return ni; 111 } 112 113 static __inline void 114 ieee80211_unref_node(struct ieee80211_node **ni) 115 { 116 atomic_subtract_int(&(*ni)->ni_refcnt, 1); 117 *ni = NULL; /* guard against use */ 118 } 119 120 struct ieee80211com; 121 122 extern void ieee80211_node_attach(struct ifnet *); 123 extern void ieee80211_node_lateattach(struct ifnet *); 124 extern void ieee80211_node_detach(struct ifnet *); 125 126 extern void ieee80211_begin_scan(struct ifnet *); 127 extern void ieee80211_next_scan(struct ifnet *); 128 extern void ieee80211_end_scan(struct ifnet *); 129 extern struct ieee80211_node *ieee80211_alloc_node(struct ieee80211com *, 130 u_int8_t *); 131 extern struct ieee80211_node *ieee80211_dup_bss(struct ieee80211com *, 132 u_int8_t *); 133 extern struct ieee80211_node *ieee80211_find_node(struct ieee80211com *, 134 u_int8_t *); 135 extern struct ieee80211_node * ieee80211_lookup_node(struct ieee80211com *, 136 u_int8_t *macaddr, struct ieee80211_channel *); 137 extern void ieee80211_free_node(struct ieee80211com *, 138 struct ieee80211_node *); 139 extern void ieee80211_free_allnodes(struct ieee80211com *); 140 typedef void ieee80211_iter_func(void *, struct ieee80211_node *); 141 extern void ieee80211_iterate_nodes(struct ieee80211com *ic, 142 ieee80211_iter_func *, void *); 143 extern void ieee80211_timeout_nodes(struct ieee80211com *); 144 145 extern void ieee80211_create_ibss(struct ieee80211com* , 146 struct ieee80211_channel *); 147 #endif /* _NET80211_IEEE80211_NODE_H_ */ 148