1 /*-
2 * Copyright (c) 2001 Atsushi Onoe
3 * Copyright (c) 2002-2005 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/6.4/sys/net80211/ieee80211_node.h 168166 2007-03-31 21:49:28Z sam $
33 */
34 #ifndef _NET80211_IEEE80211_NODE_H_
35 #define _NET80211_IEEE80211_NODE_H_
36
37 #include <net80211/ieee80211_ioctl.h> /* for ieee80211_nodestats */
38
39 /*
40 * Each ieee80211com instance has a single timer that fires once a
41 * second. This is used to initiate various work depending on the
42 * state of the instance: scanning (passive or active), ``transition''
43 * (waiting for a response to a management frame when operating
44 * as a station), and node inactivity processing (when operating
45 * as an AP). For inactivity processing each node has a timeout
46 * set in it's ni_inact field that is decremented on each timeout
47 * and the node is reclaimed when the counter goes to zero. We
48 * use different inactivity timeout values depending on whether
49 * the node is associated and authorized (either by 802.1x or
50 * open/shared key authentication) or associated but yet to be
51 * authorized. The latter timeout is shorter to more aggressively
52 * reclaim nodes that leave part way through the 802.1x exchange.
53 */
54 #define IEEE80211_INACT_WAIT 15 /* inactivity interval (secs) */
55 #define IEEE80211_INACT_INIT (30/IEEE80211_INACT_WAIT) /* initial */
56 #define IEEE80211_INACT_AUTH (180/IEEE80211_INACT_WAIT) /* associated but not authorized */
57 #define IEEE80211_INACT_RUN (300/IEEE80211_INACT_WAIT) /* authorized */
58 #define IEEE80211_INACT_PROBE (30/IEEE80211_INACT_WAIT) /* probe */
59 #define IEEE80211_INACT_SCAN (300/IEEE80211_INACT_WAIT) /* scanned */
60
61 #define IEEE80211_TRANS_WAIT 5 /* mgt frame tx timer (secs) */
62
63 #define IEEE80211_NODE_HASHSIZE 32
64 /* simple hash is enough for variation of macaddr */
65 #define IEEE80211_NODE_HASH(addr) \
66 (((const u_int8_t *)(addr))[IEEE80211_ADDR_LEN - 1] % \
67 IEEE80211_NODE_HASHSIZE)
68
69 struct ieee80211_rsnparms {
70 u_int8_t rsn_mcastcipher; /* mcast/group cipher */
71 u_int8_t rsn_mcastkeylen; /* mcast key length */
72 u_int8_t rsn_ucastcipherset; /* unicast cipher set */
73 u_int8_t rsn_ucastcipher; /* selected unicast cipher */
74 u_int8_t rsn_ucastkeylen; /* unicast key length */
75 u_int8_t rsn_keymgmtset; /* key mangement algorithms */
76 u_int8_t rsn_keymgmt; /* selected key mgmt algo */
77 u_int16_t rsn_caps; /* capabilities */
78 };
79
80 struct ieee80211_node_table;
81 struct ieee80211com;
82
83 /*
84 * Node specific information. Note that drivers are expected
85 * to derive from this structure to add device-specific per-node
86 * state. This is done by overriding the ic_node_* methods in
87 * the ieee80211com structure.
88 */
89 struct ieee80211_node {
90 struct ieee80211com *ni_ic;
91 struct ieee80211_node_table *ni_table;
92 TAILQ_ENTRY(ieee80211_node) ni_list;
93 LIST_ENTRY(ieee80211_node) ni_hash;
94 u_int ni_refcnt;
95 u_int ni_scangen; /* gen# for timeout scan */
96 u_int8_t ni_authmode; /* authentication algorithm */
97 u_int16_t ni_flags; /* special-purpose state */
98 #define IEEE80211_NODE_AUTH 0x0001 /* authorized for data */
99 #define IEEE80211_NODE_QOS 0x0002 /* QoS enabled */
100 #define IEEE80211_NODE_ERP 0x0004 /* ERP enabled */
101 /* NB: this must have the same value as IEEE80211_FC1_PWR_MGT */
102 #define IEEE80211_NODE_PWR_MGT 0x0010 /* power save mode enabled */
103 #define IEEE80211_NODE_AREF 0x0020 /* authentication ref held */
104 u_int16_t ni_associd; /* assoc response */
105 u_int16_t ni_txpower; /* current transmit power */
106 u_int16_t ni_vlan; /* vlan tag */
107 u_int32_t *ni_challenge; /* shared-key challenge */
108 u_int8_t *ni_wpa_ie; /* captured WPA/RSN ie */
109 u_int8_t *ni_wme_ie; /* captured WME ie */
110 #define IEEE80211_NONQOS_TID 16 /* index for non-QoS sta */
111 u_int16_t ni_txseqs[17]; /* tx seq per-tid */
112 u_int16_t ni_rxseqs[17]; /* rx seq previous per-tid*/
113 u_int32_t ni_rxfragstamp; /* time stamp of last rx frag */
114 struct mbuf *ni_rxfrag[3]; /* rx frag reassembly */
115 struct ieee80211_rsnparms ni_rsn; /* RSN/WPA parameters */
116 struct ieee80211_key ni_ucastkey; /* unicast key */
117
118 /* hardware */
119 u_int32_t ni_rstamp; /* recv timestamp */
120 u_int8_t ni_rssi; /* recv ssi */
121
122 /* header */
123 u_int8_t ni_macaddr[IEEE80211_ADDR_LEN];
124 u_int8_t ni_bssid[IEEE80211_ADDR_LEN];
125
126 /* beacon, probe response */
127 union {
128 u_int8_t data[8];
129 u_int64_t tsf;
130 } ni_tstamp; /* from last rcv'd beacon */
131 u_int16_t ni_intval; /* beacon interval */
132 u_int16_t ni_capinfo; /* capabilities */
133 u_int8_t ni_esslen;
134 u_int8_t ni_essid[IEEE80211_NWID_LEN];
135 struct ieee80211_rateset ni_rates; /* negotiated rate set */
136 struct ieee80211_channel *ni_chan; /* XXX multiple uses */
137 u_int16_t ni_fhdwell; /* FH only */
138 u_int8_t ni_fhindex; /* FH only */
139 u_int8_t ni_erp; /* ERP from beacon/probe resp */
140 u_int16_t ni_timoff; /* byte offset to TIM ie */
141 u_int8_t ni_dtim_period; /* DTIM period */
142 u_int8_t ni_dtim_count; /* DTIM count for last bcn */
143
144 /* others */
145 int ni_fails; /* failure count to associate */
146 short ni_inact; /* inactivity mark count */
147 short ni_inact_reload;/* inactivity reload value */
148 int ni_txrate; /* index to ni_rates[] */
149 struct ifqueue ni_savedq; /* ps-poll queue */
150 struct ieee80211_nodestats ni_stats; /* per-node statistics */
151 u_int32_t ni_pad[8]; /* future expansion */
152 };
153 MALLOC_DECLARE(M_80211_NODE);
154
155 #define IEEE80211_NODE_AID(ni) IEEE80211_AID(ni->ni_associd)
156
157 #define IEEE80211_NODE_STAT(ni,stat) (ni->ni_stats.ns_##stat++)
158 #define IEEE80211_NODE_STAT_ADD(ni,stat,v) (ni->ni_stats.ns_##stat += v)
159 #define IEEE80211_NODE_STAT_SET(ni,stat,v) (ni->ni_stats.ns_##stat = v)
160
161 static __inline struct ieee80211_node *
162 ieee80211_ref_node(struct ieee80211_node *ni)
163 {
164 ieee80211_node_incref(ni);
165 return ni;
166 }
167
168 static __inline void
169 ieee80211_unref_node(struct ieee80211_node **ni)
170 {
171 ieee80211_node_decref(*ni);
172 *ni = NULL; /* guard against use */
173 }
174
175 struct ieee80211com;
176
177 void ieee80211_node_attach(struct ieee80211com *);
178 void ieee80211_node_lateattach(struct ieee80211com *);
179 void ieee80211_node_detach(struct ieee80211com *);
180
181 static __inline int
182 ieee80211_node_is_authorized(const struct ieee80211_node *ni)
183 {
184 return (ni->ni_flags & IEEE80211_NODE_AUTH);
185 }
186
187 void ieee80211_node_authorize(struct ieee80211_node *);
188 void ieee80211_node_unauthorize(struct ieee80211_node *);
189
190 void ieee80211_begin_scan(struct ieee80211com *, int);
191 int ieee80211_next_scan(struct ieee80211com *);
192 void ieee80211_probe_curchan(struct ieee80211com *, int);
193 void ieee80211_create_ibss(struct ieee80211com*, struct ieee80211_channel *);
194 void ieee80211_reset_bss(struct ieee80211com *);
195 void ieee80211_cancel_scan(struct ieee80211com *);
196 void ieee80211_end_scan(struct ieee80211com *);
197 int ieee80211_ibss_merge(struct ieee80211_node *);
198 int ieee80211_sta_join(struct ieee80211com *, struct ieee80211_node *);
199 void ieee80211_sta_leave(struct ieee80211com *, struct ieee80211_node *);
200
201 /*
202 * Table of ieee80211_node instances. Each ieee80211com
203 * has at least one for holding the scan candidates.
204 * When operating as an access point or in ibss mode there
205 * is a second table for associated stations or neighbors.
206 */
207 struct ieee80211_node_table {
208 struct ieee80211com *nt_ic; /* back reference */
209 ieee80211_node_lock_t nt_nodelock; /* on node table */
210 TAILQ_HEAD(, ieee80211_node) nt_node; /* information of all nodes */
211 LIST_HEAD(, ieee80211_node) nt_hash[IEEE80211_NODE_HASHSIZE];
212 const char *nt_name; /* for debugging */
213 ieee80211_scan_lock_t nt_scanlock; /* on nt_scangen */
214 u_int nt_scangen; /* gen# for timeout scan */
215 int nt_inact_timer; /* inactivity timer */
216 int nt_inact_init; /* initial node inact setting */
217 struct ieee80211_node **nt_keyixmap; /* key ix -> node map */
218 int nt_keyixmax; /* keyixmap size */
219
220 void (*nt_timeout)(struct ieee80211_node_table *);
221 };
222 void ieee80211_node_table_reset(struct ieee80211_node_table *);
223
224 struct ieee80211_node *ieee80211_alloc_node(
225 struct ieee80211_node_table *, const u_int8_t *);
226 struct ieee80211_node *ieee80211_tmp_node(struct ieee80211com *,
227 const u_int8_t *macaddr);
228 struct ieee80211_node *ieee80211_dup_bss(struct ieee80211_node_table *,
229 const u_int8_t *);
230 #ifdef IEEE80211_DEBUG_REFCNT
231 void ieee80211_free_node_debug(struct ieee80211_node *,
232 const char *func, int line);
233 struct ieee80211_node *ieee80211_find_node_debug(
234 struct ieee80211_node_table *, const u_int8_t *,
235 const char *func, int line);
236 struct ieee80211_node * ieee80211_find_rxnode_debug(
237 struct ieee80211com *, const struct ieee80211_frame_min *,
238 const char *func, int line);
239 struct ieee80211_node * ieee80211_find_rxnode_withkey_debug(
240 struct ieee80211com *,
241 const struct ieee80211_frame_min *, u_int16_t keyix,
242 const char *func, int line);
243 struct ieee80211_node *ieee80211_find_txnode_debug(
244 struct ieee80211com *, const u_int8_t *,
245 const char *func, int line);
246 struct ieee80211_node *ieee80211_find_node_with_channel_debug(
247 struct ieee80211_node_table *, const u_int8_t *macaddr,
248 struct ieee80211_channel *, const char *func, int line);
249 struct ieee80211_node *ieee80211_find_node_with_ssid_debug(
250 struct ieee80211_node_table *, const u_int8_t *macaddr,
251 u_int ssidlen, const u_int8_t *ssid,
252 const char *func, int line);
253 #define ieee80211_free_node(ni) \
254 ieee80211_free_node_debug(ni, __func__, __LINE__)
255 #define ieee80211_find_node(nt, mac) \
256 ieee80211_find_node_debug(nt, mac, __func__, __LINE__)
257 #define ieee80211_find_rxnode(nt, wh) \
258 ieee80211_find_rxnode_debug(nt, wh, __func__, __LINE__)
259 #define ieee80211_find_rxnode_withkey(nt, wh, keyix) \
260 ieee80211_find_rxnode_withkey_debug(nt, wh, keyix, __func__, __LINE__)
261 #define ieee80211_find_txnode(nt, mac) \
262 ieee80211_find_txnode_debug(nt, mac, __func__, __LINE__)
263 #define ieee80211_find_node_with_channel(nt, mac, c) \
264 ieee80211_find_node_with_channel_debug(nt, mac, c, __func__, __LINE__)
265 #define ieee80211_find_node_with_ssid(nt, mac, sl, ss) \
266 ieee80211_find_node_with_ssid_debug(nt, mac, sl, ss, __func__, __LINE__)
267 #else
268 void ieee80211_free_node(struct ieee80211_node *);
269 struct ieee80211_node *ieee80211_find_node(
270 struct ieee80211_node_table *, const u_int8_t *);
271 struct ieee80211_node * ieee80211_find_rxnode(
272 struct ieee80211com *, const struct ieee80211_frame_min *);
273 struct ieee80211_node * ieee80211_find_rxnode_withkey(struct ieee80211com *,
274 const struct ieee80211_frame_min *, u_int16_t keyix);
275 struct ieee80211_node *ieee80211_find_txnode(
276 struct ieee80211com *, const u_int8_t *);
277 struct ieee80211_node *ieee80211_find_node_with_channel(
278 struct ieee80211_node_table *, const u_int8_t *macaddr,
279 struct ieee80211_channel *);
280 struct ieee80211_node *ieee80211_find_node_with_ssid(
281 struct ieee80211_node_table *, const u_int8_t *macaddr,
282 u_int ssidlen, const u_int8_t *ssid);
283 #endif
284 int ieee80211_node_delucastkey(struct ieee80211_node *);
285
286 typedef void ieee80211_iter_func(void *, struct ieee80211_node *);
287 void ieee80211_iterate_nodes(struct ieee80211_node_table *,
288 ieee80211_iter_func *, void *);
289
290 void ieee80211_dump_node(struct ieee80211_node_table *,
291 struct ieee80211_node *);
292 void ieee80211_dump_nodes(struct ieee80211_node_table *);
293
294 struct ieee80211_node *ieee80211_fakeup_adhoc_node(
295 struct ieee80211_node_table *, const u_int8_t macaddr[]);
296 void ieee80211_node_join(struct ieee80211com *, struct ieee80211_node *,int);
297 void ieee80211_node_leave(struct ieee80211com *, struct ieee80211_node *);
298 u_int8_t ieee80211_getrssi(struct ieee80211com *ic);
299
300 /*
301 * Parameters supplied when adding/updating an entry in a
302 * scan cache. Pointer variables should be set to NULL
303 * if no data is available. Pointer references can be to
304 * local data; any information that is saved will be copied.
305 * All multi-byte values must be in host byte order.
306 */
307 struct ieee80211_scanparams {
308 u_int16_t capinfo; /* 802.11 capabilities */
309 u_int16_t fhdwell; /* FHSS dwell interval */
310 u_int8_t chan; /* */
311 u_int8_t bchan;
312 u_int8_t fhindex;
313 u_int8_t erp;
314 u_int16_t bintval;
315 u_int8_t timoff;
316 u_int8_t *tim;
317 u_int8_t *tstamp;
318 u_int8_t *country;
319 u_int8_t *ssid;
320 u_int8_t *rates;
321 u_int8_t *xrates;
322 u_int8_t *wpa;
323 u_int8_t *wme;
324 };
325
326 void ieee80211_add_scan(struct ieee80211com *,
327 const struct ieee80211_scanparams *,
328 const struct ieee80211_frame *,
329 int subtype, int rssi, int rstamp);
330 void ieee80211_init_neighbor(struct ieee80211_node *,
331 const struct ieee80211_frame *,
332 const struct ieee80211_scanparams *);
333 struct ieee80211_node *ieee80211_add_neighbor(struct ieee80211com *,
334 const struct ieee80211_frame *,
335 const struct ieee80211_scanparams *);
336 #endif /* _NET80211_IEEE80211_NODE_H_ */
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