Annotation of src/sys/net80211/ieee80211_node.h, Revision 1.8.2.1
1.8.2.1 ! jmc 1: /* $NetBSD: ieee80211_node.h,v 1.8 2003/12/14 09:56:53 dyoung Exp $ */
1.1 dyoung 2: /*-
3: * Copyright (c) 2001 Atsushi Onoe
4: * Copyright (c) 2002, 2003 Sam Leffler, Errno Consulting
5: * All rights reserved.
6: *
7: * Redistribution and use in source and binary forms, with or without
8: * modification, are permitted provided that the following conditions
9: * are met:
10: * 1. Redistributions of source code must retain the above copyright
11: * notice, this list of conditions and the following disclaimer.
12: * 2. Redistributions in binary form must reproduce the above copyright
13: * notice, this list of conditions and the following disclaimer in the
14: * documentation and/or other materials provided with the distribution.
15: * 3. The name of the author may not be used to endorse or promote products
16: * derived from this software without specific prior written permission.
17: *
18: * Alternatively, this software may be distributed under the terms of the
19: * GNU General Public License ("GPL") version 2 as published by the Free
20: * Software Foundation.
21: *
22: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
23: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
24: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
26: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
27: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
31: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32: *
1.8 dyoung 33: * $FreeBSD: src/sys/net80211/ieee80211_node.h,v 1.7 2003/10/17 21:41:52 sam Exp $
1.1 dyoung 34: */
35: #ifndef _NET80211_IEEE80211_NODE_H_
36: #define _NET80211_IEEE80211_NODE_H_
37:
38: #define IEEE80211_PSCAN_WAIT 5 /* passive scan wait */
39: #define IEEE80211_TRANS_WAIT 5 /* transition wait */
40: #define IEEE80211_INACT_WAIT 5 /* inactivity timer interval */
41: #define IEEE80211_INACT_MAX (300/IEEE80211_INACT_WAIT)
42:
43: #define IEEE80211_NODE_HASHSIZE 32
44: /* simple hash is enough for variation of macaddr */
45: #define IEEE80211_NODE_HASH(addr) \
46: (((u_int8_t *)(addr))[IEEE80211_ADDR_LEN - 1] % IEEE80211_NODE_HASHSIZE)
47:
48: #define IEEE80211_RATE_SIZE 8 /* 802.11 standard */
49: #define IEEE80211_RATE_MAXSIZE 15 /* max rates we'll handle */
50:
51: struct ieee80211_rateset {
52: u_int8_t rs_nrates;
53: u_int8_t rs_rates[IEEE80211_RATE_MAXSIZE];
54: };
55:
56: /*
57: * Node specific information. Note that drivers are expected
58: * to derive from this structure to add device-specific per-node
59: * state. This is done by overriding the ic_node_* methods in
60: * the ieee80211com structure.
61: */
62: struct ieee80211_node {
63: TAILQ_ENTRY(ieee80211_node) ni_list;
64: LIST_ENTRY(ieee80211_node) ni_hash;
65: u_int ni_refcnt;
1.8 dyoung 66: u_int ni_scangen; /* gen# for timeout scan */
1.1 dyoung 67:
68: /* hardware */
69: u_int32_t ni_rstamp; /* recv timestamp */
70: u_int8_t ni_rssi; /* recv ssi */
71:
72: /* header */
73: u_int8_t ni_macaddr[IEEE80211_ADDR_LEN];
74: u_int8_t ni_bssid[IEEE80211_ADDR_LEN];
75:
76: /* beacon, probe response */
77: u_int8_t ni_tstamp[8]; /* from last rcv'd beacon */
78: u_int16_t ni_intval; /* beacon interval */
79: u_int16_t ni_capinfo; /* capabilities */
80: u_int8_t ni_esslen;
81: u_int8_t ni_essid[IEEE80211_NWID_LEN];
82: struct ieee80211_rateset ni_rates; /* negotiated rate set */
83: u_int8_t *ni_country; /* country information XXX */
84: struct ieee80211_channel *ni_chan;
85: u_int16_t ni_fhdwell; /* FH only */
86: u_int8_t ni_fhindex; /* FH only */
87: u_int8_t ni_erp; /* 11g only */
88:
89: #ifdef notyet
90: /* DTIM and contention free period (CFP) */
91: u_int8_t ni_dtimperiod;
92: u_int8_t ni_cfpperiod; /* # of DTIMs between CFPs */
93: u_int16_t ni_cfpduremain; /* remaining cfp duration */
94: u_int16_t ni_cfpmaxduration;/* max CFP duration in TU */
95: u_int16_t ni_nextdtim; /* time to next DTIM */
96: u_int16_t ni_timoffset;
97: #endif
98:
1.5 dyoung 99: /* power saving mode */
100:
101: u_int8_t ni_pwrsave;
102: struct ifqueue ni_savedq; /* packets queued for pspoll */
103:
1.1 dyoung 104: /* others */
105: u_int16_t ni_associd; /* assoc response */
106: u_int16_t ni_txseq; /* seq to be transmitted */
107: u_int16_t ni_rxseq; /* seq previous received */
108: int ni_fails; /* failure count to associate */
109: int ni_inact; /* inactivity mark count */
110: int ni_txrate; /* index to ni_rates[] */
1.6 dyoung 111: u_int32_t *ni_challenge; /* shared-key challenge */
1.1 dyoung 112: };
113:
1.4 dyoung 114: #ifdef __NetBSD__
115: #define ieee80211_node_incref(ni) \
116: do { \
117: int _s = splnet(); \
118: (ni)->ni_refcnt++; \
119: splx(_s); \
120: } while (0)
121:
122: static __inline int
123: ieee80211_node_decref(struct ieee80211_node *ni)
124: {
125: int refcnt, s;
126: s = splnet();
127: refcnt = --ni->ni_refcnt;
128: splx(s);
129: return refcnt;
130: }
131:
132: #else
133: #define ieee80211_node_incref(ni) atomic_add_int(&(ni)->ni_refcnt, 1)
134: static __inline int
135: ieee80211_node_decref(struct ieee80211_node *ni)
136: {
137: int orefcnt;
138: do {
139: orefcnt = ni->ni_refcnt;
140: } while (atomic_cmpset_int(&ni->ni_refcnt, orefcnt, orefcnt - 1) == 0);
141: return orefcnt - 1;
142: }
143: #endif
144:
1.1 dyoung 145: static __inline struct ieee80211_node *
146: ieee80211_ref_node(struct ieee80211_node *ni)
147: {
1.2 dyoung 148: ieee80211_node_incref(ni);
1.1 dyoung 149: return ni;
150: }
151:
152: static __inline void
153: ieee80211_unref_node(struct ieee80211_node **ni)
154: {
1.4 dyoung 155: ieee80211_node_decref(*ni);
1.1 dyoung 156: *ni = NULL; /* guard against use */
157: }
1.8 dyoung 158:
159: #define IEEE80211_NODE_LOCK_INIT(_ic, _name) \
160: mtx_init(&(_ic)->ic_nodelock, _name, "802.11 node table", MTX_DEF)
161: #define IEEE80211_NODE_LOCK_DESTROY(_ic) mtx_destroy(&(_ic)->ic_nodelock)
162: #define IEEE80211_NODE_LOCK(_ic) mtx_lock(&(_ic)->ic_nodelock)
163: #define IEEE80211_NODE_UNLOCK(_ic) mtx_unlock(&(_ic)->ic_nodelock)
164: #define IEEE80211_NODE_LOCK_ASSERT(_ic) \
165: mtx_assert(&(_ic)->ic_nodelock, MA_OWNED)
1.1 dyoung 166:
167: struct ieee80211com;
168:
169: extern void ieee80211_node_attach(struct ifnet *);
170: extern void ieee80211_node_lateattach(struct ifnet *);
171: extern void ieee80211_node_detach(struct ifnet *);
172:
173: extern void ieee80211_begin_scan(struct ifnet *);
174: extern void ieee80211_next_scan(struct ifnet *);
175: extern void ieee80211_end_scan(struct ifnet *);
176: extern struct ieee80211_node *ieee80211_alloc_node(struct ieee80211com *,
177: u_int8_t *);
178: extern struct ieee80211_node *ieee80211_dup_bss(struct ieee80211com *,
179: u_int8_t *);
180: extern struct ieee80211_node *ieee80211_find_node(struct ieee80211com *,
1.7 dyoung 181: u_int8_t *);
182: extern struct ieee80211_node *ieee80211_find_rxnode(struct ieee80211com *,
183: struct ieee80211_frame *);
184: extern struct ieee80211_node *ieee80211_find_txnode(struct ieee80211com *,
1.1 dyoung 185: u_int8_t *);
186: extern struct ieee80211_node * ieee80211_lookup_node(struct ieee80211com *,
187: u_int8_t *macaddr, struct ieee80211_channel *);
1.8.2.1 ! jmc 188: extern struct ieee80211_node * ieee80211_lookup_node_for_beacon(struct ieee80211com *,
! 189: u_int8_t *macaddr, struct ieee80211_channel *, char *);
1.1 dyoung 190: extern void ieee80211_free_node(struct ieee80211com *,
191: struct ieee80211_node *);
192: extern void ieee80211_free_allnodes(struct ieee80211com *);
193: typedef void ieee80211_iter_func(void *, struct ieee80211_node *);
194: extern void ieee80211_iterate_nodes(struct ieee80211com *ic,
195: ieee80211_iter_func *, void *);
196: extern void ieee80211_timeout_nodes(struct ieee80211com *);
197:
1.5 dyoung 198: extern int ieee80211_match_bss(struct ieee80211com *,
199: struct ieee80211_node *);
1.1 dyoung 200: extern void ieee80211_create_ibss(struct ieee80211com* ,
201: struct ieee80211_channel *);
202: #endif /* _NET80211_IEEE80211_NODE_H_ */
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