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: releng/5.3/sys/net80211/ieee80211_node.h 127916 2004-04-05 22:10:26Z sam $
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 u_int ni_scangen; /* gen# for timeout scan */
66
67 /* hardware */
68 u_int32_t ni_rstamp; /* recv timestamp */
69 u_int8_t ni_rssi; /* recv ssi */
70
71 /* header */
72 u_int8_t ni_macaddr[IEEE80211_ADDR_LEN];
73 u_int8_t ni_bssid[IEEE80211_ADDR_LEN];
74
75 /* beacon, probe response */
76 u_int8_t ni_tstamp[8]; /* from last rcv'd beacon */
77 u_int16_t ni_intval; /* beacon interval */
78 u_int16_t ni_capinfo; /* capabilities */
79 u_int8_t ni_esslen;
80 u_int8_t ni_essid[IEEE80211_NWID_LEN];
81 struct ieee80211_rateset ni_rates; /* negotiated rate set */
82 u_int8_t *ni_country; /* country information XXX */
83 struct ieee80211_channel *ni_chan;
84 u_int16_t ni_fhdwell; /* FH only */
85 u_int8_t ni_fhindex; /* FH only */
86 u_int8_t ni_erp; /* 11g only */
87
88 #ifdef notyet
89 /* DTIM and contention free period (CFP) */
90 u_int8_t ni_dtimperiod;
91 u_int8_t ni_cfpperiod; /* # of DTIMs between CFPs */
92 u_int16_t ni_cfpduremain; /* remaining cfp duration */
93 u_int16_t ni_cfpmaxduration;/* max CFP duration in TU */
94 u_int16_t ni_nextdtim; /* time to next DTIM */
95 u_int16_t ni_timoffset;
96 #endif
97
98 /* others */
99 u_int16_t ni_associd; /* assoc response */
100 u_int16_t ni_txseq; /* seq to be transmitted */
101 u_int16_t ni_rxseq; /* seq previous received */
102 int ni_fails; /* failure count to associate */
103 int ni_inact; /* inactivity mark count */
104 int ni_txrate; /* index to ni_rates[] */
105 };
106
107 static __inline struct ieee80211_node *
108 ieee80211_ref_node(struct ieee80211_node *ni)
109 {
110 atomic_add_int(&ni->ni_refcnt, 1);
111 return ni;
112 }
113
114 static __inline void
115 ieee80211_unref_node(struct ieee80211_node **ni)
116 {
117 atomic_subtract_int(&(*ni)->ni_refcnt, 1);
118 *ni = NULL; /* guard against use */
119 }
120
121 #define IEEE80211_NODE_LOCK_INIT(_ic, _name) \
122 mtx_init(&(_ic)->ic_nodelock, _name, "802.11 node table", MTX_DEF)
123 #define IEEE80211_NODE_LOCK_DESTROY(_ic) mtx_destroy(&(_ic)->ic_nodelock)
124 #define IEEE80211_NODE_LOCK(_ic) mtx_lock(&(_ic)->ic_nodelock)
125 #define IEEE80211_NODE_UNLOCK(_ic) mtx_unlock(&(_ic)->ic_nodelock)
126 #define IEEE80211_NODE_LOCK_ASSERT(_ic) \
127 mtx_assert(&(_ic)->ic_nodelock, MA_OWNED)
128
129 struct ieee80211com;
130
131 #ifdef MALLOC_DECLARE
132 MALLOC_DECLARE(M_80211_NODE);
133 #endif
134
135 extern void ieee80211_node_attach(struct ifnet *);
136 extern void ieee80211_node_lateattach(struct ifnet *);
137 extern void ieee80211_node_detach(struct ifnet *);
138
139 extern void ieee80211_begin_scan(struct ifnet *);
140 extern void ieee80211_next_scan(struct ifnet *);
141 extern void ieee80211_end_scan(struct ifnet *);
142 extern struct ieee80211_node *ieee80211_alloc_node(struct ieee80211com *,
143 u_int8_t *);
144 extern struct ieee80211_node *ieee80211_dup_bss(struct ieee80211com *,
145 u_int8_t *);
146 extern struct ieee80211_node *ieee80211_find_node(struct ieee80211com *,
147 u_int8_t *);
148 extern struct ieee80211_node *ieee80211_find_txnode(struct ieee80211com *,
149 u_int8_t *);
150 extern struct ieee80211_node * ieee80211_lookup_node(struct ieee80211com *,
151 u_int8_t *macaddr, struct ieee80211_channel *);
152 extern void ieee80211_free_node(struct ieee80211com *,
153 struct ieee80211_node *);
154 extern void ieee80211_free_allnodes(struct ieee80211com *);
155 typedef void ieee80211_iter_func(void *, struct ieee80211_node *);
156 extern void ieee80211_iterate_nodes(struct ieee80211com *ic,
157 ieee80211_iter_func *, void *);
158 extern void ieee80211_timeout_nodes(struct ieee80211com *);
159
160 extern void ieee80211_create_ibss(struct ieee80211com* ,
161 struct ieee80211_channel *);
162 #endif /* _NET80211_IEEE80211_NODE_H_ */
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