ieee80211_node.c revision 1.1.1.6 1 1.1 dyoung /*-
2 1.1 dyoung * Copyright (c) 2001 Atsushi Onoe
3 1.1.1.4 dyoung * Copyright (c) 2002-2005 Sam Leffler, Errno Consulting
4 1.1 dyoung * All rights reserved.
5 1.1 dyoung *
6 1.1 dyoung * Redistribution and use in source and binary forms, with or without
7 1.1 dyoung * modification, are permitted provided that the following conditions
8 1.1 dyoung * are met:
9 1.1 dyoung * 1. Redistributions of source code must retain the above copyright
10 1.1 dyoung * notice, this list of conditions and the following disclaimer.
11 1.1 dyoung * 2. Redistributions in binary form must reproduce the above copyright
12 1.1 dyoung * notice, this list of conditions and the following disclaimer in the
13 1.1 dyoung * documentation and/or other materials provided with the distribution.
14 1.1 dyoung * 3. The name of the author may not be used to endorse or promote products
15 1.1 dyoung * derived from this software without specific prior written permission.
16 1.1 dyoung *
17 1.1 dyoung * Alternatively, this software may be distributed under the terms of the
18 1.1 dyoung * GNU General Public License ("GPL") version 2 as published by the Free
19 1.1 dyoung * Software Foundation.
20 1.1 dyoung *
21 1.1 dyoung * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
22 1.1 dyoung * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
23 1.1 dyoung * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
24 1.1 dyoung * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
25 1.1 dyoung * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
26 1.1 dyoung * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 1.1 dyoung * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 1.1 dyoung * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 1.1 dyoung * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
30 1.1 dyoung * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 1.1 dyoung */
32 1.1 dyoung
33 1.1 dyoung #include <sys/cdefs.h>
34 1.1.1.6 skrll __FBSDID("$FreeBSD: src/sys/net80211/ieee80211_node.c,v 1.65 2005/08/13 17:50:21 sam Exp $");
35 1.1 dyoung
36 1.1 dyoung #include <sys/param.h>
37 1.1 dyoung #include <sys/systm.h>
38 1.1 dyoung #include <sys/mbuf.h>
39 1.1 dyoung #include <sys/malloc.h>
40 1.1 dyoung #include <sys/kernel.h>
41 1.1 dyoung
42 1.1.1.4 dyoung #include <sys/socket.h>
43 1.1 dyoung
44 1.1 dyoung #include <net/if.h>
45 1.1 dyoung #include <net/if_media.h>
46 1.1 dyoung #include <net/ethernet.h>
47 1.1 dyoung
48 1.1 dyoung #include <net80211/ieee80211_var.h>
49 1.1 dyoung
50 1.1 dyoung #include <net/bpf.h>
51 1.1 dyoung
52 1.1.1.5 dyoung /*
53 1.1.1.5 dyoung * Association id's are managed with a bit vector.
54 1.1.1.5 dyoung */
55 1.1.1.5 dyoung #define IEEE80211_AID_SET(b, w) \
56 1.1.1.5 dyoung ((w)[IEEE80211_AID(b) / 32] |= (1 << (IEEE80211_AID(b) % 32)))
57 1.1.1.5 dyoung #define IEEE80211_AID_CLR(b, w) \
58 1.1.1.5 dyoung ((w)[IEEE80211_AID(b) / 32] &= ~(1 << (IEEE80211_AID(b) % 32)))
59 1.1.1.5 dyoung #define IEEE80211_AID_ISSET(b, w) \
60 1.1.1.5 dyoung ((w)[IEEE80211_AID(b) / 32] & (1 << (IEEE80211_AID(b) % 32)))
61 1.1.1.5 dyoung
62 1.1.1.4 dyoung static struct ieee80211_node *node_alloc(struct ieee80211_node_table *);
63 1.1.1.4 dyoung static void node_cleanup(struct ieee80211_node *);
64 1.1.1.4 dyoung static void node_free(struct ieee80211_node *);
65 1.1.1.4 dyoung static u_int8_t node_getrssi(const struct ieee80211_node *);
66 1.1.1.4 dyoung
67 1.1.1.4 dyoung static void ieee80211_setup_node(struct ieee80211_node_table *,
68 1.1.1.4 dyoung struct ieee80211_node *, const u_int8_t *);
69 1.1.1.4 dyoung static void _ieee80211_free_node(struct ieee80211_node *);
70 1.1.1.4 dyoung static void ieee80211_free_allnodes(struct ieee80211_node_table *);
71 1.1.1.4 dyoung
72 1.1.1.4 dyoung static void ieee80211_timeout_scan_candidates(struct ieee80211_node_table *);
73 1.1.1.4 dyoung static void ieee80211_timeout_stations(struct ieee80211_node_table *);
74 1.1.1.4 dyoung
75 1.1.1.6 skrll static void ieee80211_set_tim(struct ieee80211_node *, int set);
76 1.1.1.4 dyoung
77 1.1.1.4 dyoung static void ieee80211_node_table_init(struct ieee80211com *ic,
78 1.1.1.6 skrll struct ieee80211_node_table *nt, const char *name,
79 1.1.1.6 skrll int inact, int keyixmax,
80 1.1.1.4 dyoung void (*timeout)(struct ieee80211_node_table *));
81 1.1.1.4 dyoung static void ieee80211_node_table_cleanup(struct ieee80211_node_table *nt);
82 1.1 dyoung
83 1.1.1.3 dyoung MALLOC_DEFINE(M_80211_NODE, "80211node", "802.11 node state");
84 1.1.1.2 dyoung
85 1.1 dyoung void
86 1.1.1.4 dyoung ieee80211_node_attach(struct ieee80211com *ic)
87 1.1 dyoung {
88 1.1 dyoung
89 1.1.1.4 dyoung ic->ic_node_alloc = node_alloc;
90 1.1.1.4 dyoung ic->ic_node_free = node_free;
91 1.1.1.4 dyoung ic->ic_node_cleanup = node_cleanup;
92 1.1.1.4 dyoung ic->ic_node_getrssi = node_getrssi;
93 1.1.1.4 dyoung
94 1.1.1.4 dyoung /* default station inactivity timer setings */
95 1.1.1.4 dyoung ic->ic_inact_init = IEEE80211_INACT_INIT;
96 1.1.1.4 dyoung ic->ic_inact_auth = IEEE80211_INACT_AUTH;
97 1.1.1.4 dyoung ic->ic_inact_run = IEEE80211_INACT_RUN;
98 1.1.1.4 dyoung ic->ic_inact_probe = IEEE80211_INACT_PROBE;
99 1.1.1.4 dyoung
100 1.1.1.6 skrll /* NB: driver should override */
101 1.1.1.6 skrll ic->ic_max_aid = IEEE80211_AID_DEF;
102 1.1.1.6 skrll ic->ic_set_tim = ieee80211_set_tim;
103 1.1.1.6 skrll }
104 1.1.1.6 skrll
105 1.1.1.6 skrll void
106 1.1.1.6 skrll ieee80211_node_lateattach(struct ieee80211com *ic)
107 1.1.1.6 skrll {
108 1.1.1.6 skrll struct ieee80211_rsnparms *rsn;
109 1.1.1.6 skrll
110 1.1.1.6 skrll if (ic->ic_max_aid > IEEE80211_AID_MAX)
111 1.1.1.4 dyoung ic->ic_max_aid = IEEE80211_AID_MAX;
112 1.1.1.4 dyoung MALLOC(ic->ic_aid_bitmap, u_int32_t *,
113 1.1.1.4 dyoung howmany(ic->ic_max_aid, 32) * sizeof(u_int32_t),
114 1.1.1.4 dyoung M_DEVBUF, M_NOWAIT | M_ZERO);
115 1.1.1.4 dyoung if (ic->ic_aid_bitmap == NULL) {
116 1.1.1.4 dyoung /* XXX no way to recover */
117 1.1.1.4 dyoung printf("%s: no memory for AID bitmap!\n", __func__);
118 1.1.1.4 dyoung ic->ic_max_aid = 0;
119 1.1.1.4 dyoung }
120 1.1.1.4 dyoung
121 1.1.1.4 dyoung /* XXX defer until using hostap/ibss mode */
122 1.1.1.4 dyoung ic->ic_tim_len = howmany(ic->ic_max_aid, 8) * sizeof(u_int8_t);
123 1.1.1.4 dyoung MALLOC(ic->ic_tim_bitmap, u_int8_t *, ic->ic_tim_len,
124 1.1.1.4 dyoung M_DEVBUF, M_NOWAIT | M_ZERO);
125 1.1.1.4 dyoung if (ic->ic_tim_bitmap == NULL) {
126 1.1.1.4 dyoung /* XXX no way to recover */
127 1.1.1.4 dyoung printf("%s: no memory for TIM bitmap!\n", __func__);
128 1.1.1.4 dyoung }
129 1.1 dyoung
130 1.1.1.6 skrll ieee80211_node_table_init(ic, &ic->ic_sta, "station",
131 1.1.1.6 skrll IEEE80211_INACT_INIT, ic->ic_crypto.cs_max_keyix,
132 1.1.1.6 skrll ieee80211_timeout_stations);
133 1.1.1.6 skrll ieee80211_node_table_init(ic, &ic->ic_scan, "scan",
134 1.1.1.6 skrll IEEE80211_INACT_SCAN, 0,
135 1.1.1.6 skrll ieee80211_timeout_scan_candidates);
136 1.1 dyoung
137 1.1.1.6 skrll ieee80211_reset_bss(ic);
138 1.1.1.4 dyoung /*
139 1.1.1.4 dyoung * Setup "global settings" in the bss node so that
140 1.1.1.4 dyoung * each new station automatically inherits them.
141 1.1.1.4 dyoung */
142 1.1.1.6 skrll rsn = &ic->ic_bss->ni_rsn;
143 1.1.1.4 dyoung /* WEP, TKIP, and AES-CCM are always supported */
144 1.1.1.4 dyoung rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_WEP;
145 1.1.1.4 dyoung rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_TKIP;
146 1.1.1.4 dyoung rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_AES_CCM;
147 1.1.1.4 dyoung if (ic->ic_caps & IEEE80211_C_AES)
148 1.1.1.4 dyoung rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_AES_OCB;
149 1.1.1.4 dyoung if (ic->ic_caps & IEEE80211_C_CKIP)
150 1.1.1.4 dyoung rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_CKIP;
151 1.1.1.4 dyoung /*
152 1.1.1.4 dyoung * Default unicast cipher to WEP for 802.1x use. If
153 1.1.1.4 dyoung * WPA is enabled the management code will set these
154 1.1.1.4 dyoung * values to reflect.
155 1.1.1.4 dyoung */
156 1.1.1.4 dyoung rsn->rsn_ucastcipher = IEEE80211_CIPHER_WEP;
157 1.1.1.4 dyoung rsn->rsn_ucastkeylen = 104 / NBBY;
158 1.1.1.4 dyoung /*
159 1.1.1.4 dyoung * WPA says the multicast cipher is the lowest unicast
160 1.1.1.4 dyoung * cipher supported. But we skip WEP which would
161 1.1.1.4 dyoung * otherwise be used based on this criteria.
162 1.1.1.4 dyoung */
163 1.1.1.4 dyoung rsn->rsn_mcastcipher = IEEE80211_CIPHER_TKIP;
164 1.1.1.4 dyoung rsn->rsn_mcastkeylen = 128 / NBBY;
165 1.1.1.4 dyoung
166 1.1.1.4 dyoung /*
167 1.1.1.4 dyoung * We support both WPA-PSK and 802.1x; the one used
168 1.1.1.4 dyoung * is determined by the authentication mode and the
169 1.1.1.4 dyoung * setting of the PSK state.
170 1.1.1.4 dyoung */
171 1.1.1.4 dyoung rsn->rsn_keymgmtset = WPA_ASE_8021X_UNSPEC | WPA_ASE_8021X_PSK;
172 1.1.1.4 dyoung rsn->rsn_keymgmt = WPA_ASE_8021X_PSK;
173 1.1.1.4 dyoung
174 1.1.1.6 skrll ic->ic_auth = ieee80211_authenticator_get(ic->ic_bss->ni_authmode);
175 1.1 dyoung }
176 1.1 dyoung
177 1.1 dyoung void
178 1.1.1.4 dyoung ieee80211_node_detach(struct ieee80211com *ic)
179 1.1 dyoung {
180 1.1 dyoung
181 1.1.1.4 dyoung if (ic->ic_bss != NULL) {
182 1.1.1.4 dyoung ieee80211_free_node(ic->ic_bss);
183 1.1.1.4 dyoung ic->ic_bss = NULL;
184 1.1.1.4 dyoung }
185 1.1.1.4 dyoung ieee80211_node_table_cleanup(&ic->ic_scan);
186 1.1.1.4 dyoung ieee80211_node_table_cleanup(&ic->ic_sta);
187 1.1.1.4 dyoung if (ic->ic_aid_bitmap != NULL) {
188 1.1.1.4 dyoung FREE(ic->ic_aid_bitmap, M_DEVBUF);
189 1.1.1.4 dyoung ic->ic_aid_bitmap = NULL;
190 1.1.1.4 dyoung }
191 1.1.1.4 dyoung if (ic->ic_tim_bitmap != NULL) {
192 1.1.1.4 dyoung FREE(ic->ic_tim_bitmap, M_DEVBUF);
193 1.1.1.4 dyoung ic->ic_tim_bitmap = NULL;
194 1.1.1.4 dyoung }
195 1.1.1.4 dyoung }
196 1.1.1.4 dyoung
197 1.1.1.4 dyoung /*
198 1.1.1.4 dyoung * Port authorize/unauthorize interfaces for use by an authenticator.
199 1.1.1.4 dyoung */
200 1.1.1.4 dyoung
201 1.1.1.4 dyoung void
202 1.1.1.6 skrll ieee80211_node_authorize(struct ieee80211_node *ni)
203 1.1.1.4 dyoung {
204 1.1.1.6 skrll struct ieee80211com *ic = ni->ni_ic;
205 1.1.1.6 skrll
206 1.1.1.4 dyoung ni->ni_flags |= IEEE80211_NODE_AUTH;
207 1.1.1.4 dyoung ni->ni_inact_reload = ic->ic_inact_run;
208 1.1.1.4 dyoung }
209 1.1.1.4 dyoung
210 1.1.1.4 dyoung void
211 1.1.1.6 skrll ieee80211_node_unauthorize(struct ieee80211_node *ni)
212 1.1.1.4 dyoung {
213 1.1.1.4 dyoung ni->ni_flags &= ~IEEE80211_NODE_AUTH;
214 1.1.1.4 dyoung }
215 1.1.1.4 dyoung
216 1.1.1.4 dyoung /*
217 1.1.1.4 dyoung * Set/change the channel. The rate set is also updated as
218 1.1.1.4 dyoung * to insure a consistent view by drivers.
219 1.1.1.4 dyoung */
220 1.1.1.4 dyoung static __inline void
221 1.1.1.4 dyoung ieee80211_set_chan(struct ieee80211com *ic,
222 1.1.1.4 dyoung struct ieee80211_node *ni, struct ieee80211_channel *chan)
223 1.1.1.4 dyoung {
224 1.1.1.4 dyoung ni->ni_chan = chan;
225 1.1.1.4 dyoung ni->ni_rates = ic->ic_sup_rates[ieee80211_chan2mode(ic, chan)];
226 1.1 dyoung }
227 1.1 dyoung
228 1.1 dyoung /*
229 1.1 dyoung * AP scanning support.
230 1.1 dyoung */
231 1.1 dyoung
232 1.1.1.4 dyoung #ifdef IEEE80211_DEBUG
233 1.1.1.4 dyoung static void
234 1.1.1.4 dyoung dump_chanlist(const u_char chans[])
235 1.1.1.4 dyoung {
236 1.1.1.4 dyoung const char *sep;
237 1.1.1.4 dyoung int i;
238 1.1.1.4 dyoung
239 1.1.1.4 dyoung sep = " ";
240 1.1.1.4 dyoung for (i = 0; i < IEEE80211_CHAN_MAX; i++)
241 1.1.1.4 dyoung if (isset(chans, i)) {
242 1.1.1.4 dyoung printf("%s%u", sep, i);
243 1.1.1.4 dyoung sep = ", ";
244 1.1.1.4 dyoung }
245 1.1.1.4 dyoung }
246 1.1.1.4 dyoung #endif /* IEEE80211_DEBUG */
247 1.1.1.4 dyoung
248 1.1 dyoung /*
249 1.1.1.4 dyoung * Initialize the channel set to scan based on the
250 1.1 dyoung * of available channels and the current PHY mode.
251 1.1 dyoung */
252 1.1 dyoung static void
253 1.1.1.4 dyoung ieee80211_reset_scan(struct ieee80211com *ic)
254 1.1 dyoung {
255 1.1 dyoung
256 1.1.1.4 dyoung /* XXX ic_des_chan should be handled with ic_chan_active */
257 1.1.1.4 dyoung if (ic->ic_des_chan != IEEE80211_CHAN_ANYC) {
258 1.1.1.4 dyoung memset(ic->ic_chan_scan, 0, sizeof(ic->ic_chan_scan));
259 1.1.1.4 dyoung setbit(ic->ic_chan_scan,
260 1.1.1.4 dyoung ieee80211_chan2ieee(ic, ic->ic_des_chan));
261 1.1.1.4 dyoung } else
262 1.1.1.4 dyoung memcpy(ic->ic_chan_scan, ic->ic_chan_active,
263 1.1.1.4 dyoung sizeof(ic->ic_chan_active));
264 1.1.1.4 dyoung #ifdef IEEE80211_DEBUG
265 1.1.1.4 dyoung if (ieee80211_msg_scan(ic)) {
266 1.1.1.4 dyoung printf("%s: scan set:", __func__);
267 1.1.1.4 dyoung dump_chanlist(ic->ic_chan_scan);
268 1.1.1.4 dyoung printf(" start chan %u\n",
269 1.1.1.6 skrll ieee80211_chan2ieee(ic, ic->ic_curchan));
270 1.1.1.4 dyoung }
271 1.1.1.4 dyoung #endif /* IEEE80211_DEBUG */
272 1.1 dyoung }
273 1.1 dyoung
274 1.1 dyoung /*
275 1.1 dyoung * Begin an active scan.
276 1.1 dyoung */
277 1.1 dyoung void
278 1.1.1.4 dyoung ieee80211_begin_scan(struct ieee80211com *ic, int reset)
279 1.1 dyoung {
280 1.1 dyoung
281 1.1.1.4 dyoung ic->ic_scan.nt_scangen++;
282 1.1 dyoung /*
283 1.1 dyoung * In all but hostap mode scanning starts off in
284 1.1 dyoung * an active mode before switching to passive.
285 1.1 dyoung */
286 1.1.1.2 dyoung if (ic->ic_opmode != IEEE80211_M_HOSTAP) {
287 1.1 dyoung ic->ic_flags |= IEEE80211_F_ASCAN;
288 1.1.1.2 dyoung ic->ic_stats.is_scan_active++;
289 1.1.1.2 dyoung } else
290 1.1.1.2 dyoung ic->ic_stats.is_scan_passive++;
291 1.1.1.4 dyoung IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN,
292 1.1.1.4 dyoung "begin %s scan in %s mode, scangen %u\n",
293 1.1.1.4 dyoung (ic->ic_flags & IEEE80211_F_ASCAN) ? "active" : "passive",
294 1.1.1.4 dyoung ieee80211_phymode_name[ic->ic_curmode], ic->ic_scan.nt_scangen);
295 1.1.1.4 dyoung /*
296 1.1.1.4 dyoung * Clear scan state and flush any previously seen AP's.
297 1.1 dyoung */
298 1.1.1.4 dyoung ieee80211_reset_scan(ic);
299 1.1.1.4 dyoung if (reset)
300 1.1.1.4 dyoung ieee80211_free_allnodes(&ic->ic_scan);
301 1.1.1.4 dyoung
302 1.1.1.4 dyoung ic->ic_flags |= IEEE80211_F_SCAN;
303 1.1 dyoung
304 1.1 dyoung /* Scan the next channel. */
305 1.1.1.4 dyoung ieee80211_next_scan(ic);
306 1.1 dyoung }
307 1.1 dyoung
308 1.1 dyoung /*
309 1.1 dyoung * Switch to the next channel marked for scanning.
310 1.1 dyoung */
311 1.1.1.4 dyoung int
312 1.1.1.4 dyoung ieee80211_next_scan(struct ieee80211com *ic)
313 1.1 dyoung {
314 1.1 dyoung struct ieee80211_channel *chan;
315 1.1 dyoung
316 1.1.1.4 dyoung /*
317 1.1.1.4 dyoung * Insure any previous mgt frame timeouts don't fire.
318 1.1.1.4 dyoung * This assumes the driver does the right thing in
319 1.1.1.4 dyoung * flushing anything queued in the driver and below.
320 1.1.1.4 dyoung */
321 1.1.1.4 dyoung ic->ic_mgt_timer = 0;
322 1.1.1.4 dyoung
323 1.1.1.6 skrll chan = ic->ic_curchan;
324 1.1.1.4 dyoung do {
325 1.1 dyoung if (++chan > &ic->ic_channels[IEEE80211_CHAN_MAX])
326 1.1 dyoung chan = &ic->ic_channels[0];
327 1.1 dyoung if (isset(ic->ic_chan_scan, ieee80211_chan2ieee(ic, chan))) {
328 1.1.1.4 dyoung clrbit(ic->ic_chan_scan, ieee80211_chan2ieee(ic, chan));
329 1.1.1.4 dyoung IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN,
330 1.1.1.4 dyoung "%s: chan %d->%d\n", __func__,
331 1.1.1.6 skrll ieee80211_chan2ieee(ic, ic->ic_curchan),
332 1.1.1.4 dyoung ieee80211_chan2ieee(ic, chan));
333 1.1.1.6 skrll ic->ic_curchan = chan;
334 1.1 dyoung /*
335 1.1.1.6 skrll * XXX drivers should do this as needed,
336 1.1.1.6 skrll * XXX for now maintain compatibility
337 1.1 dyoung */
338 1.1.1.6 skrll ic->ic_bss->ni_rates =
339 1.1.1.6 skrll ic->ic_sup_rates[ieee80211_chan2mode(ic, chan)];
340 1.1.1.4 dyoung ieee80211_new_state(ic, IEEE80211_S_SCAN, -1);
341 1.1.1.4 dyoung return 1;
342 1.1 dyoung }
343 1.1.1.6 skrll } while (chan != ic->ic_curchan);
344 1.1.1.4 dyoung ieee80211_end_scan(ic);
345 1.1.1.4 dyoung return 0;
346 1.1.1.4 dyoung }
347 1.1.1.4 dyoung
348 1.1.1.4 dyoung static __inline void
349 1.1.1.4 dyoung copy_bss(struct ieee80211_node *nbss, const struct ieee80211_node *obss)
350 1.1.1.4 dyoung {
351 1.1.1.4 dyoung /* propagate useful state */
352 1.1.1.4 dyoung nbss->ni_authmode = obss->ni_authmode;
353 1.1.1.4 dyoung nbss->ni_txpower = obss->ni_txpower;
354 1.1.1.4 dyoung nbss->ni_vlan = obss->ni_vlan;
355 1.1.1.4 dyoung nbss->ni_rsn = obss->ni_rsn;
356 1.1.1.4 dyoung /* XXX statistics? */
357 1.1 dyoung }
358 1.1 dyoung
359 1.1 dyoung void
360 1.1 dyoung ieee80211_create_ibss(struct ieee80211com* ic, struct ieee80211_channel *chan)
361 1.1 dyoung {
362 1.1.1.4 dyoung struct ieee80211_node_table *nt;
363 1.1 dyoung struct ieee80211_node *ni;
364 1.1 dyoung
365 1.1.1.4 dyoung IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN,
366 1.1.1.4 dyoung "%s: creating ibss\n", __func__);
367 1.1.1.4 dyoung
368 1.1.1.4 dyoung /*
369 1.1.1.4 dyoung * Create the station/neighbor table. Note that for adhoc
370 1.1.1.4 dyoung * mode we make the initial inactivity timer longer since
371 1.1.1.4 dyoung * we create nodes only through discovery and they typically
372 1.1.1.4 dyoung * are long-lived associations.
373 1.1.1.4 dyoung */
374 1.1.1.4 dyoung nt = &ic->ic_sta;
375 1.1.1.4 dyoung IEEE80211_NODE_LOCK(nt);
376 1.1.1.4 dyoung if (ic->ic_opmode == IEEE80211_M_HOSTAP) {
377 1.1.1.4 dyoung nt->nt_name = "station";
378 1.1.1.4 dyoung nt->nt_inact_init = ic->ic_inact_init;
379 1.1.1.4 dyoung } else {
380 1.1.1.4 dyoung nt->nt_name = "neighbor";
381 1.1.1.4 dyoung nt->nt_inact_init = ic->ic_inact_run;
382 1.1.1.4 dyoung }
383 1.1.1.4 dyoung IEEE80211_NODE_UNLOCK(nt);
384 1.1.1.4 dyoung
385 1.1.1.6 skrll ni = ieee80211_alloc_node(&ic->ic_sta, ic->ic_myaddr);
386 1.1.1.4 dyoung if (ni == NULL) {
387 1.1.1.4 dyoung /* XXX recovery? */
388 1.1.1.4 dyoung return;
389 1.1.1.4 dyoung }
390 1.1 dyoung IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_myaddr);
391 1.1 dyoung ni->ni_esslen = ic->ic_des_esslen;
392 1.1 dyoung memcpy(ni->ni_essid, ic->ic_des_essid, ni->ni_esslen);
393 1.1.1.4 dyoung copy_bss(ni, ic->ic_bss);
394 1.1.1.6 skrll ni->ni_intval = ic->ic_bintval;
395 1.1.1.4 dyoung if (ic->ic_flags & IEEE80211_F_PRIVACY)
396 1.1 dyoung ni->ni_capinfo |= IEEE80211_CAPINFO_PRIVACY;
397 1.1 dyoung if (ic->ic_phytype == IEEE80211_T_FH) {
398 1.1 dyoung ni->ni_fhdwell = 200; /* XXX */
399 1.1 dyoung ni->ni_fhindex = 1;
400 1.1 dyoung }
401 1.1.1.4 dyoung if (ic->ic_opmode == IEEE80211_M_IBSS) {
402 1.1.1.4 dyoung ic->ic_flags |= IEEE80211_F_SIBSS;
403 1.1.1.4 dyoung ni->ni_capinfo |= IEEE80211_CAPINFO_IBSS; /* XXX */
404 1.1.1.4 dyoung if (ic->ic_flags & IEEE80211_F_DESBSSID)
405 1.1.1.4 dyoung IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_des_bssid);
406 1.1.1.4 dyoung else
407 1.1.1.4 dyoung ni->ni_bssid[0] |= 0x02; /* local bit for IBSS */
408 1.1.1.4 dyoung }
409 1.1.1.4 dyoung /*
410 1.1.1.4 dyoung * Fix the channel and related attributes.
411 1.1.1.4 dyoung */
412 1.1.1.4 dyoung ieee80211_set_chan(ic, ni, chan);
413 1.1.1.6 skrll ic->ic_curchan = chan;
414 1.1.1.4 dyoung ic->ic_curmode = ieee80211_chan2mode(ic, chan);
415 1.1.1.4 dyoung /*
416 1.1.1.4 dyoung * Do mode-specific rate setup.
417 1.1.1.4 dyoung */
418 1.1.1.4 dyoung if (ic->ic_curmode == IEEE80211_MODE_11G) {
419 1.1.1.4 dyoung /*
420 1.1.1.4 dyoung * Use a mixed 11b/11g rate set.
421 1.1.1.4 dyoung */
422 1.1.1.4 dyoung ieee80211_set11gbasicrates(&ni->ni_rates, IEEE80211_MODE_11G);
423 1.1.1.4 dyoung } else if (ic->ic_curmode == IEEE80211_MODE_11B) {
424 1.1.1.4 dyoung /*
425 1.1.1.4 dyoung * Force pure 11b rate set.
426 1.1.1.4 dyoung */
427 1.1.1.4 dyoung ieee80211_set11gbasicrates(&ni->ni_rates, IEEE80211_MODE_11B);
428 1.1.1.4 dyoung }
429 1.1.1.4 dyoung
430 1.1.1.4 dyoung (void) ieee80211_sta_join(ic, ieee80211_ref_node(ni));
431 1.1.1.4 dyoung }
432 1.1.1.4 dyoung
433 1.1.1.4 dyoung void
434 1.1.1.4 dyoung ieee80211_reset_bss(struct ieee80211com *ic)
435 1.1.1.4 dyoung {
436 1.1.1.4 dyoung struct ieee80211_node *ni, *obss;
437 1.1.1.4 dyoung
438 1.1.1.4 dyoung ieee80211_node_table_reset(&ic->ic_scan);
439 1.1.1.4 dyoung ieee80211_node_table_reset(&ic->ic_sta);
440 1.1.1.4 dyoung
441 1.1.1.4 dyoung ni = ieee80211_alloc_node(&ic->ic_scan, ic->ic_myaddr);
442 1.1.1.4 dyoung KASSERT(ni != NULL, ("unable to setup inital BSS node"));
443 1.1.1.4 dyoung obss = ic->ic_bss;
444 1.1.1.4 dyoung ic->ic_bss = ieee80211_ref_node(ni);
445 1.1.1.4 dyoung if (obss != NULL) {
446 1.1.1.4 dyoung copy_bss(ni, obss);
447 1.1.1.6 skrll ni->ni_intval = ic->ic_bintval;
448 1.1.1.4 dyoung ieee80211_free_node(obss);
449 1.1.1.4 dyoung }
450 1.1 dyoung }
451 1.1 dyoung
452 1.1.1.6 skrll /* XXX tunable */
453 1.1.1.6 skrll #define STA_FAILS_MAX 2 /* assoc failures before ignored */
454 1.1.1.6 skrll
455 1.1.1.3 dyoung static int
456 1.1.1.4 dyoung ieee80211_match_bss(struct ieee80211com *ic, struct ieee80211_node *ni)
457 1.1.1.3 dyoung {
458 1.1.1.3 dyoung u_int8_t rate;
459 1.1.1.3 dyoung int fail;
460 1.1.1.3 dyoung
461 1.1.1.3 dyoung fail = 0;
462 1.1.1.3 dyoung if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan)))
463 1.1.1.3 dyoung fail |= 0x01;
464 1.1.1.3 dyoung if (ic->ic_des_chan != IEEE80211_CHAN_ANYC &&
465 1.1.1.3 dyoung ni->ni_chan != ic->ic_des_chan)
466 1.1.1.3 dyoung fail |= 0x01;
467 1.1.1.3 dyoung if (ic->ic_opmode == IEEE80211_M_IBSS) {
468 1.1.1.3 dyoung if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0)
469 1.1.1.3 dyoung fail |= 0x02;
470 1.1.1.3 dyoung } else {
471 1.1.1.3 dyoung if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0)
472 1.1.1.3 dyoung fail |= 0x02;
473 1.1.1.3 dyoung }
474 1.1.1.4 dyoung if (ic->ic_flags & IEEE80211_F_PRIVACY) {
475 1.1.1.3 dyoung if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0)
476 1.1.1.3 dyoung fail |= 0x04;
477 1.1.1.3 dyoung } else {
478 1.1.1.3 dyoung /* XXX does this mean privacy is supported or required? */
479 1.1.1.3 dyoung if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY)
480 1.1.1.3 dyoung fail |= 0x04;
481 1.1.1.3 dyoung }
482 1.1.1.6 skrll rate = ieee80211_fix_rate(ni, IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE);
483 1.1.1.3 dyoung if (rate & IEEE80211_RATE_BASIC)
484 1.1.1.3 dyoung fail |= 0x08;
485 1.1.1.3 dyoung if (ic->ic_des_esslen != 0 &&
486 1.1.1.3 dyoung (ni->ni_esslen != ic->ic_des_esslen ||
487 1.1.1.3 dyoung memcmp(ni->ni_essid, ic->ic_des_essid, ic->ic_des_esslen) != 0))
488 1.1.1.3 dyoung fail |= 0x10;
489 1.1.1.3 dyoung if ((ic->ic_flags & IEEE80211_F_DESBSSID) &&
490 1.1.1.3 dyoung !IEEE80211_ADDR_EQ(ic->ic_des_bssid, ni->ni_bssid))
491 1.1.1.3 dyoung fail |= 0x20;
492 1.1.1.6 skrll if (ni->ni_fails >= STA_FAILS_MAX)
493 1.1.1.6 skrll fail |= 0x40;
494 1.1.1.3 dyoung #ifdef IEEE80211_DEBUG
495 1.1.1.4 dyoung if (ieee80211_msg_scan(ic)) {
496 1.1.1.6 skrll printf(" %c %s",
497 1.1.1.6 skrll fail & 0x40 ? '=' : fail & 0x80 ? '^' : fail ? '-' : '+',
498 1.1.1.3 dyoung ether_sprintf(ni->ni_macaddr));
499 1.1.1.3 dyoung printf(" %s%c", ether_sprintf(ni->ni_bssid),
500 1.1.1.3 dyoung fail & 0x20 ? '!' : ' ');
501 1.1.1.3 dyoung printf(" %3d%c", ieee80211_chan2ieee(ic, ni->ni_chan),
502 1.1.1.3 dyoung fail & 0x01 ? '!' : ' ');
503 1.1.1.3 dyoung printf(" %+4d", ni->ni_rssi);
504 1.1.1.3 dyoung printf(" %2dM%c", (rate & IEEE80211_RATE_VAL) / 2,
505 1.1.1.3 dyoung fail & 0x08 ? '!' : ' ');
506 1.1.1.3 dyoung printf(" %4s%c",
507 1.1.1.3 dyoung (ni->ni_capinfo & IEEE80211_CAPINFO_ESS) ? "ess" :
508 1.1.1.3 dyoung (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) ? "ibss" :
509 1.1.1.3 dyoung "????",
510 1.1.1.3 dyoung fail & 0x02 ? '!' : ' ');
511 1.1.1.3 dyoung printf(" %3s%c ",
512 1.1.1.3 dyoung (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) ?
513 1.1.1.3 dyoung "wep" : "no",
514 1.1.1.3 dyoung fail & 0x04 ? '!' : ' ');
515 1.1.1.3 dyoung ieee80211_print_essid(ni->ni_essid, ni->ni_esslen);
516 1.1.1.3 dyoung printf("%s\n", fail & 0x10 ? "!" : "");
517 1.1.1.3 dyoung }
518 1.1.1.3 dyoung #endif
519 1.1.1.3 dyoung return fail;
520 1.1.1.3 dyoung }
521 1.1.1.3 dyoung
522 1.1.1.4 dyoung static __inline u_int8_t
523 1.1.1.4 dyoung maxrate(const struct ieee80211_node *ni)
524 1.1.1.4 dyoung {
525 1.1.1.4 dyoung const struct ieee80211_rateset *rs = &ni->ni_rates;
526 1.1.1.4 dyoung /* NB: assumes rate set is sorted (happens on frame receive) */
527 1.1.1.4 dyoung return rs->rs_rates[rs->rs_nrates-1] & IEEE80211_RATE_VAL;
528 1.1.1.4 dyoung }
529 1.1.1.4 dyoung
530 1.1.1.4 dyoung /*
531 1.1.1.4 dyoung * Compare the capabilities of two nodes and decide which is
532 1.1.1.4 dyoung * more desirable (return >0 if a is considered better). Note
533 1.1.1.4 dyoung * that we assume compatibility/usability has already been checked
534 1.1.1.4 dyoung * so we don't need to (e.g. validate whether privacy is supported).
535 1.1.1.4 dyoung * Used to select the best scan candidate for association in a BSS.
536 1.1.1.4 dyoung */
537 1.1.1.4 dyoung static int
538 1.1.1.4 dyoung ieee80211_node_compare(struct ieee80211com *ic,
539 1.1.1.4 dyoung const struct ieee80211_node *a,
540 1.1.1.4 dyoung const struct ieee80211_node *b)
541 1.1.1.4 dyoung {
542 1.1.1.4 dyoung u_int8_t maxa, maxb;
543 1.1.1.4 dyoung u_int8_t rssia, rssib;
544 1.1.1.6 skrll int weight;
545 1.1.1.4 dyoung
546 1.1.1.4 dyoung /* privacy support preferred */
547 1.1.1.4 dyoung if ((a->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) &&
548 1.1.1.4 dyoung (b->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0)
549 1.1.1.4 dyoung return 1;
550 1.1.1.4 dyoung if ((a->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0 &&
551 1.1.1.4 dyoung (b->ni_capinfo & IEEE80211_CAPINFO_PRIVACY))
552 1.1.1.4 dyoung return -1;
553 1.1.1.4 dyoung
554 1.1.1.6 skrll /* compare count of previous failures */
555 1.1.1.6 skrll weight = b->ni_fails - a->ni_fails;
556 1.1.1.6 skrll if (abs(weight) > 1)
557 1.1.1.6 skrll return weight;
558 1.1.1.6 skrll
559 1.1.1.4 dyoung rssia = ic->ic_node_getrssi(a);
560 1.1.1.4 dyoung rssib = ic->ic_node_getrssi(b);
561 1.1.1.4 dyoung if (abs(rssib - rssia) < 5) {
562 1.1.1.4 dyoung /* best/max rate preferred if signal level close enough XXX */
563 1.1.1.4 dyoung maxa = maxrate(a);
564 1.1.1.4 dyoung maxb = maxrate(b);
565 1.1.1.4 dyoung if (maxa != maxb)
566 1.1.1.4 dyoung return maxa - maxb;
567 1.1.1.4 dyoung /* XXX use freq for channel preference */
568 1.1.1.4 dyoung /* for now just prefer 5Ghz band to all other bands */
569 1.1.1.4 dyoung if (IEEE80211_IS_CHAN_5GHZ(a->ni_chan) &&
570 1.1.1.4 dyoung !IEEE80211_IS_CHAN_5GHZ(b->ni_chan))
571 1.1.1.4 dyoung return 1;
572 1.1.1.4 dyoung if (!IEEE80211_IS_CHAN_5GHZ(a->ni_chan) &&
573 1.1.1.4 dyoung IEEE80211_IS_CHAN_5GHZ(b->ni_chan))
574 1.1.1.4 dyoung return -1;
575 1.1.1.4 dyoung }
576 1.1.1.4 dyoung /* all things being equal, use signal level */
577 1.1.1.4 dyoung return rssia - rssib;
578 1.1.1.4 dyoung }
579 1.1.1.4 dyoung
580 1.1.1.4 dyoung /*
581 1.1.1.4 dyoung * Mark an ongoing scan stopped.
582 1.1.1.4 dyoung */
583 1.1.1.4 dyoung void
584 1.1.1.4 dyoung ieee80211_cancel_scan(struct ieee80211com *ic)
585 1.1.1.4 dyoung {
586 1.1.1.4 dyoung
587 1.1.1.4 dyoung IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, "%s: end %s scan\n",
588 1.1.1.4 dyoung __func__,
589 1.1.1.4 dyoung (ic->ic_flags & IEEE80211_F_ASCAN) ? "active" : "passive");
590 1.1.1.4 dyoung
591 1.1.1.4 dyoung ic->ic_flags &= ~(IEEE80211_F_SCAN | IEEE80211_F_ASCAN);
592 1.1.1.4 dyoung }
593 1.1.1.4 dyoung
594 1.1 dyoung /*
595 1.1 dyoung * Complete a scan of potential channels.
596 1.1 dyoung */
597 1.1 dyoung void
598 1.1.1.4 dyoung ieee80211_end_scan(struct ieee80211com *ic)
599 1.1 dyoung {
600 1.1.1.4 dyoung struct ieee80211_node_table *nt = &ic->ic_scan;
601 1.1.1.4 dyoung struct ieee80211_node *ni, *selbs;
602 1.1 dyoung
603 1.1.1.4 dyoung ieee80211_cancel_scan(ic);
604 1.1.1.4 dyoung ieee80211_notify_scan_done(ic);
605 1.1 dyoung
606 1.1 dyoung if (ic->ic_opmode == IEEE80211_M_HOSTAP) {
607 1.1.1.4 dyoung u_int8_t maxrssi[IEEE80211_CHAN_MAX]; /* XXX off stack? */
608 1.1.1.4 dyoung int i, bestchan;
609 1.1.1.4 dyoung u_int8_t rssi;
610 1.1.1.4 dyoung
611 1.1 dyoung /*
612 1.1 dyoung * The passive scan to look for existing AP's completed,
613 1.1 dyoung * select a channel to camp on. Identify the channels
614 1.1 dyoung * that already have one or more AP's and try to locate
615 1.1.1.4 dyoung * an unoccupied one. If that fails, pick a channel that
616 1.1.1.4 dyoung * looks to be quietest.
617 1.1 dyoung */
618 1.1.1.4 dyoung memset(maxrssi, 0, sizeof(maxrssi));
619 1.1.1.4 dyoung IEEE80211_NODE_LOCK(nt);
620 1.1.1.4 dyoung TAILQ_FOREACH(ni, &nt->nt_node, ni_list) {
621 1.1.1.4 dyoung rssi = ic->ic_node_getrssi(ni);
622 1.1.1.4 dyoung i = ieee80211_chan2ieee(ic, ni->ni_chan);
623 1.1.1.4 dyoung if (rssi > maxrssi[i])
624 1.1.1.4 dyoung maxrssi[i] = rssi;
625 1.1 dyoung }
626 1.1.1.4 dyoung IEEE80211_NODE_UNLOCK(nt);
627 1.1.1.4 dyoung /* XXX select channel more intelligently */
628 1.1.1.4 dyoung bestchan = -1;
629 1.1 dyoung for (i = 0; i < IEEE80211_CHAN_MAX; i++)
630 1.1.1.4 dyoung if (isset(ic->ic_chan_active, i)) {
631 1.1.1.4 dyoung /*
632 1.1.1.4 dyoung * If the channel is unoccupied the max rssi
633 1.1.1.4 dyoung * should be zero; just take it. Otherwise
634 1.1.1.4 dyoung * track the channel with the lowest rssi and
635 1.1.1.4 dyoung * use that when all channels appear occupied.
636 1.1.1.4 dyoung */
637 1.1.1.4 dyoung if (maxrssi[i] == 0) {
638 1.1.1.4 dyoung bestchan = i;
639 1.1 dyoung break;
640 1.1.1.4 dyoung }
641 1.1.1.4 dyoung if (bestchan == -1 ||
642 1.1.1.4 dyoung maxrssi[i] < maxrssi[bestchan])
643 1.1.1.4 dyoung bestchan = i;
644 1.1.1.4 dyoung }
645 1.1.1.4 dyoung if (bestchan != -1) {
646 1.1.1.4 dyoung ieee80211_create_ibss(ic, &ic->ic_channels[bestchan]);
647 1.1.1.4 dyoung return;
648 1.1 dyoung }
649 1.1.1.4 dyoung /* no suitable channel, should not happen */
650 1.1 dyoung }
651 1.1.1.4 dyoung
652 1.1.1.4 dyoung /*
653 1.1.1.4 dyoung * When manually sequencing the state machine; scan just once
654 1.1.1.4 dyoung * regardless of whether we have a candidate or not. The
655 1.1.1.4 dyoung * controlling application is expected to setup state and
656 1.1.1.4 dyoung * initiate an association.
657 1.1.1.4 dyoung */
658 1.1.1.4 dyoung if (ic->ic_roaming == IEEE80211_ROAMING_MANUAL)
659 1.1.1.4 dyoung return;
660 1.1.1.4 dyoung /*
661 1.1.1.4 dyoung * Automatic sequencing; look for a candidate and
662 1.1.1.4 dyoung * if found join the network.
663 1.1.1.4 dyoung */
664 1.1.1.4 dyoung /* NB: unlocked read should be ok */
665 1.1.1.4 dyoung if (TAILQ_FIRST(&nt->nt_node) == NULL) {
666 1.1.1.4 dyoung IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN,
667 1.1.1.4 dyoung "%s: no scan candidate\n", __func__);
668 1.1 dyoung notfound:
669 1.1 dyoung if (ic->ic_opmode == IEEE80211_M_IBSS &&
670 1.1 dyoung (ic->ic_flags & IEEE80211_F_IBSSON) &&
671 1.1 dyoung ic->ic_des_esslen != 0) {
672 1.1 dyoung ieee80211_create_ibss(ic, ic->ic_ibss_chan);
673 1.1 dyoung return;
674 1.1 dyoung }
675 1.1 dyoung /*
676 1.1.1.6 skrll * Decrement the failure counts so entries will be
677 1.1.1.6 skrll * reconsidered the next time around. We really want
678 1.1.1.6 skrll * to do this only for sta's where we've previously
679 1.1.1.6 skrll had some success.
680 1.1.1.6 skrll */
681 1.1.1.6 skrll IEEE80211_NODE_LOCK(nt);
682 1.1.1.6 skrll TAILQ_FOREACH(ni, &nt->nt_node, ni_list)
683 1.1.1.6 skrll if (ni->ni_fails)
684 1.1.1.6 skrll ni->ni_fails--;
685 1.1.1.6 skrll IEEE80211_NODE_UNLOCK(nt);
686 1.1.1.6 skrll /*
687 1.1 dyoung * Reset the list of channels to scan and start again.
688 1.1 dyoung */
689 1.1.1.4 dyoung ieee80211_reset_scan(ic);
690 1.1.1.4 dyoung ic->ic_flags |= IEEE80211_F_SCAN;
691 1.1.1.4 dyoung ieee80211_next_scan(ic);
692 1.1 dyoung return;
693 1.1 dyoung }
694 1.1 dyoung selbs = NULL;
695 1.1.1.4 dyoung IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, "\t%s\n",
696 1.1.1.4 dyoung "macaddr bssid chan rssi rate flag wep essid");
697 1.1.1.4 dyoung IEEE80211_NODE_LOCK(nt);
698 1.1.1.4 dyoung TAILQ_FOREACH(ni, &nt->nt_node, ni_list) {
699 1.1.1.4 dyoung if (ieee80211_match_bss(ic, ni) == 0) {
700 1.1 dyoung if (selbs == NULL)
701 1.1 dyoung selbs = ni;
702 1.1.1.4 dyoung else if (ieee80211_node_compare(ic, ni, selbs) > 0)
703 1.1 dyoung selbs = ni;
704 1.1 dyoung }
705 1.1 dyoung }
706 1.1.1.4 dyoung if (selbs != NULL) /* NB: grab ref while dropping lock */
707 1.1.1.4 dyoung (void) ieee80211_ref_node(selbs);
708 1.1.1.4 dyoung IEEE80211_NODE_UNLOCK(nt);
709 1.1 dyoung if (selbs == NULL)
710 1.1 dyoung goto notfound;
711 1.1.1.4 dyoung if (!ieee80211_sta_join(ic, selbs)) {
712 1.1.1.4 dyoung ieee80211_free_node(selbs);
713 1.1.1.4 dyoung goto notfound;
714 1.1.1.4 dyoung }
715 1.1.1.4 dyoung }
716 1.1.1.4 dyoung
717 1.1.1.4 dyoung /*
718 1.1.1.4 dyoung * Handle 802.11 ad hoc network merge. The
719 1.1.1.4 dyoung * convention, set by the Wireless Ethernet Compatibility Alliance
720 1.1.1.4 dyoung * (WECA), is that an 802.11 station will change its BSSID to match
721 1.1.1.4 dyoung * the "oldest" 802.11 ad hoc network, on the same channel, that
722 1.1.1.4 dyoung * has the station's desired SSID. The "oldest" 802.11 network
723 1.1.1.4 dyoung * sends beacons with the greatest TSF timestamp.
724 1.1.1.4 dyoung *
725 1.1.1.4 dyoung * The caller is assumed to validate TSF's before attempting a merge.
726 1.1.1.4 dyoung *
727 1.1.1.4 dyoung * Return !0 if the BSSID changed, 0 otherwise.
728 1.1.1.4 dyoung */
729 1.1.1.4 dyoung int
730 1.1.1.6 skrll ieee80211_ibss_merge(struct ieee80211_node *ni)
731 1.1.1.4 dyoung {
732 1.1.1.6 skrll struct ieee80211com *ic = ni->ni_ic;
733 1.1.1.4 dyoung
734 1.1.1.4 dyoung if (ni == ic->ic_bss ||
735 1.1.1.4 dyoung IEEE80211_ADDR_EQ(ni->ni_bssid, ic->ic_bss->ni_bssid)) {
736 1.1.1.4 dyoung /* unchanged, nothing to do */
737 1.1.1.4 dyoung return 0;
738 1.1.1.4 dyoung }
739 1.1.1.4 dyoung if (ieee80211_match_bss(ic, ni) != 0) { /* capabilities mismatch */
740 1.1.1.4 dyoung IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC,
741 1.1.1.4 dyoung "%s: merge failed, capabilities mismatch\n", __func__);
742 1.1.1.4 dyoung ic->ic_stats.is_ibss_capmismatch++;
743 1.1.1.4 dyoung return 0;
744 1.1.1.4 dyoung }
745 1.1.1.4 dyoung IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC,
746 1.1.1.4 dyoung "%s: new bssid %s: %s preamble, %s slot time%s\n", __func__,
747 1.1.1.4 dyoung ether_sprintf(ni->ni_bssid),
748 1.1.1.4 dyoung ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long",
749 1.1.1.4 dyoung ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long",
750 1.1.1.4 dyoung ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : ""
751 1.1.1.4 dyoung );
752 1.1.1.4 dyoung return ieee80211_sta_join(ic, ieee80211_ref_node(ni));
753 1.1.1.4 dyoung }
754 1.1.1.4 dyoung
755 1.1.1.4 dyoung /*
756 1.1.1.4 dyoung * Join the specified IBSS/BSS network. The node is assumed to
757 1.1.1.4 dyoung * be passed in with a held reference.
758 1.1.1.4 dyoung */
759 1.1.1.4 dyoung int
760 1.1.1.4 dyoung ieee80211_sta_join(struct ieee80211com *ic, struct ieee80211_node *selbs)
761 1.1.1.4 dyoung {
762 1.1.1.4 dyoung struct ieee80211_node *obss;
763 1.1.1.4 dyoung
764 1.1 dyoung if (ic->ic_opmode == IEEE80211_M_IBSS) {
765 1.1.1.4 dyoung struct ieee80211_node_table *nt;
766 1.1.1.4 dyoung /*
767 1.1.1.4 dyoung * Delete unusable rates; we've already checked
768 1.1.1.4 dyoung * that the negotiated rate set is acceptable.
769 1.1.1.3 dyoung */
770 1.1.1.6 skrll ieee80211_fix_rate(selbs, IEEE80211_F_DODEL);
771 1.1.1.4 dyoung /*
772 1.1.1.4 dyoung * Fillin the neighbor table; it will already
773 1.1.1.4 dyoung * exist if we are simply switching mastership.
774 1.1.1.4 dyoung * XXX ic_sta always setup so this is unnecessary?
775 1.1.1.4 dyoung */
776 1.1.1.4 dyoung nt = &ic->ic_sta;
777 1.1.1.4 dyoung IEEE80211_NODE_LOCK(nt);
778 1.1.1.4 dyoung nt->nt_name = "neighbor";
779 1.1.1.4 dyoung nt->nt_inact_init = ic->ic_inact_run;
780 1.1.1.4 dyoung IEEE80211_NODE_UNLOCK(nt);
781 1.1 dyoung }
782 1.1.1.4 dyoung
783 1.1.1.4 dyoung /*
784 1.1.1.4 dyoung * Committed to selbs, setup state.
785 1.1.1.4 dyoung */
786 1.1.1.4 dyoung obss = ic->ic_bss;
787 1.1.1.4 dyoung ic->ic_bss = selbs; /* NB: caller assumed to bump refcnt */
788 1.1.1.4 dyoung if (obss != NULL)
789 1.1.1.4 dyoung ieee80211_free_node(obss);
790 1.1.1.4 dyoung /*
791 1.1.1.4 dyoung * Set the erp state (mostly the slot time) to deal with
792 1.1.1.4 dyoung * the auto-select case; this should be redundant if the
793 1.1.1.4 dyoung * mode is locked.
794 1.1.1.4 dyoung */
795 1.1.1.4 dyoung ic->ic_curmode = ieee80211_chan2mode(ic, selbs->ni_chan);
796 1.1.1.6 skrll ic->ic_curchan = selbs->ni_chan;
797 1.1.1.4 dyoung ieee80211_reset_erp(ic);
798 1.1.1.4 dyoung ieee80211_wme_initparams(ic);
799 1.1.1.4 dyoung
800 1.1.1.4 dyoung if (ic->ic_opmode == IEEE80211_M_STA)
801 1.1.1.4 dyoung ieee80211_new_state(ic, IEEE80211_S_AUTH, -1);
802 1.1.1.4 dyoung else
803 1.1.1.4 dyoung ieee80211_new_state(ic, IEEE80211_S_RUN, -1);
804 1.1.1.4 dyoung return 1;
805 1.1.1.4 dyoung }
806 1.1.1.4 dyoung
807 1.1.1.4 dyoung /*
808 1.1.1.4 dyoung * Leave the specified IBSS/BSS network. The node is assumed to
809 1.1.1.4 dyoung * be passed in with a held reference.
810 1.1.1.4 dyoung */
811 1.1.1.4 dyoung void
812 1.1.1.4 dyoung ieee80211_sta_leave(struct ieee80211com *ic, struct ieee80211_node *ni)
813 1.1.1.4 dyoung {
814 1.1.1.4 dyoung ic->ic_node_cleanup(ni);
815 1.1.1.4 dyoung ieee80211_notify_node_leave(ic, ni);
816 1.1 dyoung }
817 1.1 dyoung
818 1.1 dyoung static struct ieee80211_node *
819 1.1.1.4 dyoung node_alloc(struct ieee80211_node_table *nt)
820 1.1 dyoung {
821 1.1.1.3 dyoung struct ieee80211_node *ni;
822 1.1.1.4 dyoung
823 1.1.1.3 dyoung MALLOC(ni, struct ieee80211_node *, sizeof(struct ieee80211_node),
824 1.1.1.3 dyoung M_80211_NODE, M_NOWAIT | M_ZERO);
825 1.1.1.3 dyoung return ni;
826 1.1 dyoung }
827 1.1 dyoung
828 1.1.1.4 dyoung /*
829 1.1.1.4 dyoung * Reclaim any resources in a node and reset any critical
830 1.1.1.4 dyoung * state. Typically nodes are free'd immediately after,
831 1.1.1.4 dyoung * but in some cases the storage may be reused so we need
832 1.1.1.4 dyoung * to insure consistent state (should probably fix that).
833 1.1.1.4 dyoung */
834 1.1 dyoung static void
835 1.1.1.4 dyoung node_cleanup(struct ieee80211_node *ni)
836 1.1 dyoung {
837 1.1.1.4 dyoung #define N(a) (sizeof(a)/sizeof(a[0]))
838 1.1.1.4 dyoung struct ieee80211com *ic = ni->ni_ic;
839 1.1.1.4 dyoung int i, qlen;
840 1.1.1.4 dyoung
841 1.1.1.4 dyoung /* NB: preserve ni_table */
842 1.1.1.4 dyoung if (ni->ni_flags & IEEE80211_NODE_PWR_MGT) {
843 1.1.1.4 dyoung ic->ic_ps_sta--;
844 1.1.1.4 dyoung ni->ni_flags &= ~IEEE80211_NODE_PWR_MGT;
845 1.1.1.4 dyoung IEEE80211_DPRINTF(ic, IEEE80211_MSG_POWER,
846 1.1.1.4 dyoung "[%s] power save mode off, %u sta's in ps mode\n",
847 1.1.1.4 dyoung ether_sprintf(ni->ni_macaddr), ic->ic_ps_sta);
848 1.1.1.4 dyoung }
849 1.1.1.5 dyoung /*
850 1.1.1.5 dyoung * Clear AREF flag that marks the authorization refcnt bump
851 1.1.1.5 dyoung * has happened. This is probably not needed as the node
852 1.1.1.5 dyoung * should always be removed from the table so not found but
853 1.1.1.5 dyoung * do it just in case.
854 1.1.1.5 dyoung */
855 1.1.1.5 dyoung ni->ni_flags &= ~IEEE80211_NODE_AREF;
856 1.1.1.4 dyoung
857 1.1.1.4 dyoung /*
858 1.1.1.4 dyoung * Drain power save queue and, if needed, clear TIM.
859 1.1.1.4 dyoung */
860 1.1.1.4 dyoung IEEE80211_NODE_SAVEQ_DRAIN(ni, qlen);
861 1.1.1.4 dyoung if (qlen != 0 && ic->ic_set_tim != NULL)
862 1.1.1.6 skrll ic->ic_set_tim(ni, 0);
863 1.1.1.4 dyoung
864 1.1.1.4 dyoung ni->ni_associd = 0;
865 1.1.1.4 dyoung if (ni->ni_challenge != NULL) {
866 1.1.1.4 dyoung FREE(ni->ni_challenge, M_DEVBUF);
867 1.1.1.4 dyoung ni->ni_challenge = NULL;
868 1.1.1.4 dyoung }
869 1.1.1.4 dyoung /*
870 1.1.1.4 dyoung * Preserve SSID, WPA, and WME ie's so the bss node is
871 1.1.1.4 dyoung * reusable during a re-auth/re-assoc state transition.
872 1.1.1.4 dyoung * If we remove these data they will not be recreated
873 1.1.1.4 dyoung * because they come from a probe-response or beacon frame
874 1.1.1.4 dyoung * which cannot be expected prior to the association-response.
875 1.1.1.4 dyoung * This should not be an issue when operating in other modes
876 1.1.1.4 dyoung * as stations leaving always go through a full state transition
877 1.1.1.4 dyoung * which will rebuild this state.
878 1.1.1.4 dyoung *
879 1.1.1.4 dyoung * XXX does this leave us open to inheriting old state?
880 1.1.1.4 dyoung */
881 1.1.1.4 dyoung for (i = 0; i < N(ni->ni_rxfrag); i++)
882 1.1.1.4 dyoung if (ni->ni_rxfrag[i] != NULL) {
883 1.1.1.4 dyoung m_freem(ni->ni_rxfrag[i]);
884 1.1.1.4 dyoung ni->ni_rxfrag[i] = NULL;
885 1.1.1.4 dyoung }
886 1.1.1.6 skrll /*
887 1.1.1.6 skrll * Must be careful here to remove any key map entry w/o a LOR.
888 1.1.1.6 skrll */
889 1.1.1.6 skrll ieee80211_node_delucastkey(ni);
890 1.1.1.4 dyoung #undef N
891 1.1 dyoung }
892 1.1 dyoung
893 1.1 dyoung static void
894 1.1.1.4 dyoung node_free(struct ieee80211_node *ni)
895 1.1 dyoung {
896 1.1.1.4 dyoung struct ieee80211com *ic = ni->ni_ic;
897 1.1.1.4 dyoung
898 1.1.1.4 dyoung ic->ic_node_cleanup(ni);
899 1.1.1.4 dyoung if (ni->ni_wpa_ie != NULL)
900 1.1.1.4 dyoung FREE(ni->ni_wpa_ie, M_DEVBUF);
901 1.1.1.4 dyoung if (ni->ni_wme_ie != NULL)
902 1.1.1.4 dyoung FREE(ni->ni_wme_ie, M_DEVBUF);
903 1.1.1.4 dyoung IEEE80211_NODE_SAVEQ_DESTROY(ni);
904 1.1.1.4 dyoung FREE(ni, M_80211_NODE);
905 1.1 dyoung }
906 1.1 dyoung
907 1.1.1.2 dyoung static u_int8_t
908 1.1.1.4 dyoung node_getrssi(const struct ieee80211_node *ni)
909 1.1.1.2 dyoung {
910 1.1.1.2 dyoung return ni->ni_rssi;
911 1.1.1.2 dyoung }
912 1.1.1.2 dyoung
913 1.1 dyoung static void
914 1.1.1.4 dyoung ieee80211_setup_node(struct ieee80211_node_table *nt,
915 1.1.1.4 dyoung struct ieee80211_node *ni, const u_int8_t *macaddr)
916 1.1 dyoung {
917 1.1.1.4 dyoung struct ieee80211com *ic = nt->nt_ic;
918 1.1 dyoung int hash;
919 1.1 dyoung
920 1.1.1.4 dyoung IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE,
921 1.1.1.4 dyoung "%s %p<%s> in %s table\n", __func__, ni,
922 1.1.1.4 dyoung ether_sprintf(macaddr), nt->nt_name);
923 1.1.1.4 dyoung
924 1.1 dyoung IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr);
925 1.1 dyoung hash = IEEE80211_NODE_HASH(macaddr);
926 1.1.1.4 dyoung ieee80211_node_initref(ni); /* mark referenced */
927 1.1.1.4 dyoung ni->ni_chan = IEEE80211_CHAN_ANYC;
928 1.1.1.4 dyoung ni->ni_authmode = IEEE80211_AUTH_OPEN;
929 1.1.1.4 dyoung ni->ni_txpower = ic->ic_txpowlimit; /* max power */
930 1.1.1.4 dyoung ieee80211_crypto_resetkey(ic, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE);
931 1.1.1.4 dyoung ni->ni_inact_reload = nt->nt_inact_init;
932 1.1.1.4 dyoung ni->ni_inact = ni->ni_inact_reload;
933 1.1.1.4 dyoung IEEE80211_NODE_SAVEQ_INIT(ni, "unknown");
934 1.1.1.4 dyoung
935 1.1.1.4 dyoung IEEE80211_NODE_LOCK(nt);
936 1.1.1.4 dyoung TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list);
937 1.1.1.4 dyoung LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash);
938 1.1.1.4 dyoung ni->ni_table = nt;
939 1.1.1.4 dyoung ni->ni_ic = ic;
940 1.1.1.4 dyoung IEEE80211_NODE_UNLOCK(nt);
941 1.1 dyoung }
942 1.1 dyoung
943 1.1 dyoung struct ieee80211_node *
944 1.1.1.4 dyoung ieee80211_alloc_node(struct ieee80211_node_table *nt, const u_int8_t *macaddr)
945 1.1 dyoung {
946 1.1.1.4 dyoung struct ieee80211com *ic = nt->nt_ic;
947 1.1.1.4 dyoung struct ieee80211_node *ni;
948 1.1.1.4 dyoung
949 1.1.1.4 dyoung ni = ic->ic_node_alloc(nt);
950 1.1 dyoung if (ni != NULL)
951 1.1.1.4 dyoung ieee80211_setup_node(nt, ni, macaddr);
952 1.1.1.3 dyoung else
953 1.1.1.3 dyoung ic->ic_stats.is_rx_nodealloc++;
954 1.1 dyoung return ni;
955 1.1 dyoung }
956 1.1 dyoung
957 1.1.1.6 skrll /*
958 1.1.1.6 skrll * Craft a temporary node suitable for sending a management frame
959 1.1.1.6 skrll * to the specified station. We craft only as much state as we
960 1.1.1.6 skrll * need to do the work since the node will be immediately reclaimed
961 1.1.1.6 skrll * once the send completes.
962 1.1.1.6 skrll */
963 1.1.1.6 skrll struct ieee80211_node *
964 1.1.1.6 skrll ieee80211_tmp_node(struct ieee80211com *ic, const u_int8_t *macaddr)
965 1.1.1.6 skrll {
966 1.1.1.6 skrll struct ieee80211_node *ni;
967 1.1.1.6 skrll
968 1.1.1.6 skrll ni = ic->ic_node_alloc(&ic->ic_sta);
969 1.1.1.6 skrll if (ni != NULL) {
970 1.1.1.6 skrll IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE,
971 1.1.1.6 skrll "%s %p<%s>\n", __func__, ni, ether_sprintf(macaddr));
972 1.1.1.6 skrll
973 1.1.1.6 skrll IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr);
974 1.1.1.6 skrll IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_bss->ni_bssid);
975 1.1.1.6 skrll ieee80211_node_initref(ni); /* mark referenced */
976 1.1.1.6 skrll ni->ni_txpower = ic->ic_bss->ni_txpower;
977 1.1.1.6 skrll /* NB: required by ieee80211_fix_rate */
978 1.1.1.6 skrll ieee80211_set_chan(ic, ni, ic->ic_bss->ni_chan);
979 1.1.1.6 skrll ieee80211_crypto_resetkey(ic, &ni->ni_ucastkey,
980 1.1.1.6 skrll IEEE80211_KEYIX_NONE);
981 1.1.1.6 skrll /* XXX optimize away */
982 1.1.1.6 skrll IEEE80211_NODE_SAVEQ_INIT(ni, "unknown");
983 1.1.1.6 skrll
984 1.1.1.6 skrll ni->ni_table = NULL; /* NB: pedantic */
985 1.1.1.6 skrll ni->ni_ic = ic;
986 1.1.1.6 skrll } else {
987 1.1.1.6 skrll /* XXX msg */
988 1.1.1.6 skrll ic->ic_stats.is_rx_nodealloc++;
989 1.1.1.6 skrll }
990 1.1.1.6 skrll return ni;
991 1.1.1.6 skrll }
992 1.1.1.6 skrll
993 1.1 dyoung struct ieee80211_node *
994 1.1.1.4 dyoung ieee80211_dup_bss(struct ieee80211_node_table *nt, const u_int8_t *macaddr)
995 1.1 dyoung {
996 1.1.1.4 dyoung struct ieee80211com *ic = nt->nt_ic;
997 1.1.1.4 dyoung struct ieee80211_node *ni;
998 1.1.1.4 dyoung
999 1.1.1.4 dyoung ni = ic->ic_node_alloc(nt);
1000 1.1 dyoung if (ni != NULL) {
1001 1.1.1.4 dyoung ieee80211_setup_node(nt, ni, macaddr);
1002 1.1.1.3 dyoung /*
1003 1.1.1.3 dyoung * Inherit from ic_bss.
1004 1.1.1.3 dyoung */
1005 1.1.1.4 dyoung ni->ni_authmode = ic->ic_bss->ni_authmode;
1006 1.1.1.4 dyoung ni->ni_txpower = ic->ic_bss->ni_txpower;
1007 1.1.1.4 dyoung ni->ni_vlan = ic->ic_bss->ni_vlan; /* XXX?? */
1008 1.1.1.3 dyoung IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_bss->ni_bssid);
1009 1.1.1.4 dyoung ieee80211_set_chan(ic, ni, ic->ic_bss->ni_chan);
1010 1.1.1.4 dyoung ni->ni_rsn = ic->ic_bss->ni_rsn;
1011 1.1.1.3 dyoung } else
1012 1.1.1.3 dyoung ic->ic_stats.is_rx_nodealloc++;
1013 1.1 dyoung return ni;
1014 1.1 dyoung }
1015 1.1 dyoung
1016 1.1.1.3 dyoung static struct ieee80211_node *
1017 1.1.1.4 dyoung #ifdef IEEE80211_DEBUG_REFCNT
1018 1.1.1.4 dyoung _ieee80211_find_node_debug(struct ieee80211_node_table *nt,
1019 1.1.1.4 dyoung const u_int8_t *macaddr, const char *func, int line)
1020 1.1.1.4 dyoung #else
1021 1.1.1.4 dyoung _ieee80211_find_node(struct ieee80211_node_table *nt,
1022 1.1.1.4 dyoung const u_int8_t *macaddr)
1023 1.1.1.4 dyoung #endif
1024 1.1 dyoung {
1025 1.1 dyoung struct ieee80211_node *ni;
1026 1.1 dyoung int hash;
1027 1.1 dyoung
1028 1.1.1.4 dyoung IEEE80211_NODE_LOCK_ASSERT(nt);
1029 1.1.1.3 dyoung
1030 1.1 dyoung hash = IEEE80211_NODE_HASH(macaddr);
1031 1.1.1.4 dyoung LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) {
1032 1.1 dyoung if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) {
1033 1.1.1.4 dyoung ieee80211_ref_node(ni); /* mark referenced */
1034 1.1.1.4 dyoung #ifdef IEEE80211_DEBUG_REFCNT
1035 1.1.1.4 dyoung IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE,
1036 1.1.1.4 dyoung "%s (%s:%u) %p<%s> refcnt %d\n", __func__,
1037 1.1.1.4 dyoung func, line,
1038 1.1.1.4 dyoung ni, ether_sprintf(ni->ni_macaddr),
1039 1.1.1.4 dyoung ieee80211_node_refcnt(ni));
1040 1.1.1.4 dyoung #endif
1041 1.1.1.3 dyoung return ni;
1042 1.1 dyoung }
1043 1.1 dyoung }
1044 1.1.1.3 dyoung return NULL;
1045 1.1.1.3 dyoung }
1046 1.1.1.4 dyoung #ifdef IEEE80211_DEBUG_REFCNT
1047 1.1.1.4 dyoung #define _ieee80211_find_node(nt, mac) \
1048 1.1.1.4 dyoung _ieee80211_find_node_debug(nt, mac, func, line)
1049 1.1.1.4 dyoung #endif
1050 1.1.1.3 dyoung
1051 1.1.1.3 dyoung struct ieee80211_node *
1052 1.1.1.4 dyoung #ifdef IEEE80211_DEBUG_REFCNT
1053 1.1.1.4 dyoung ieee80211_find_node_debug(struct ieee80211_node_table *nt,
1054 1.1.1.4 dyoung const u_int8_t *macaddr, const char *func, int line)
1055 1.1.1.4 dyoung #else
1056 1.1.1.4 dyoung ieee80211_find_node(struct ieee80211_node_table *nt, const u_int8_t *macaddr)
1057 1.1.1.4 dyoung #endif
1058 1.1.1.3 dyoung {
1059 1.1.1.3 dyoung struct ieee80211_node *ni;
1060 1.1.1.3 dyoung
1061 1.1.1.4 dyoung IEEE80211_NODE_LOCK(nt);
1062 1.1.1.4 dyoung ni = _ieee80211_find_node(nt, macaddr);
1063 1.1.1.4 dyoung IEEE80211_NODE_UNLOCK(nt);
1064 1.1 dyoung return ni;
1065 1.1 dyoung }
1066 1.1 dyoung
1067 1.1 dyoung /*
1068 1.1.1.4 dyoung * Fake up a node; this handles node discovery in adhoc mode.
1069 1.1.1.4 dyoung * Note that for the driver's benefit we we treat this like
1070 1.1.1.4 dyoung * an association so the driver has an opportunity to setup
1071 1.1.1.4 dyoung * it's private state.
1072 1.1.1.4 dyoung */
1073 1.1.1.4 dyoung struct ieee80211_node *
1074 1.1.1.4 dyoung ieee80211_fakeup_adhoc_node(struct ieee80211_node_table *nt,
1075 1.1.1.4 dyoung const u_int8_t macaddr[IEEE80211_ADDR_LEN])
1076 1.1.1.4 dyoung {
1077 1.1.1.4 dyoung struct ieee80211com *ic = nt->nt_ic;
1078 1.1.1.4 dyoung struct ieee80211_node *ni;
1079 1.1.1.4 dyoung
1080 1.1.1.4 dyoung ni = ieee80211_dup_bss(nt, macaddr);
1081 1.1.1.4 dyoung if (ni != NULL) {
1082 1.1.1.4 dyoung /* XXX no rate negotiation; just dup */
1083 1.1.1.4 dyoung ni->ni_rates = ic->ic_bss->ni_rates;
1084 1.1.1.4 dyoung if (ic->ic_newassoc != NULL)
1085 1.1.1.6 skrll ic->ic_newassoc(ni, 1);
1086 1.1.1.4 dyoung /* XXX not right for 802.1x/WPA */
1087 1.1.1.6 skrll ieee80211_node_authorize(ni);
1088 1.1.1.4 dyoung }
1089 1.1.1.4 dyoung return ni;
1090 1.1.1.4 dyoung }
1091 1.1.1.4 dyoung
1092 1.1.1.6 skrll #ifdef IEEE80211_DEBUG
1093 1.1.1.6 skrll static void
1094 1.1.1.6 skrll dump_probe_beacon(u_int8_t subtype, int isnew,
1095 1.1.1.6 skrll const u_int8_t mac[IEEE80211_ADDR_LEN],
1096 1.1.1.6 skrll const struct ieee80211_scanparams *sp)
1097 1.1.1.6 skrll {
1098 1.1.1.6 skrll
1099 1.1.1.6 skrll printf("[%s] %s%s on chan %u (bss chan %u) ",
1100 1.1.1.6 skrll ether_sprintf(mac), isnew ? "new " : "",
1101 1.1.1.6 skrll ieee80211_mgt_subtype_name[subtype >> IEEE80211_FC0_SUBTYPE_SHIFT],
1102 1.1.1.6 skrll sp->chan, sp->bchan);
1103 1.1.1.6 skrll ieee80211_print_essid(sp->ssid + 2, sp->ssid[1]);
1104 1.1.1.6 skrll printf("\n");
1105 1.1.1.6 skrll
1106 1.1.1.6 skrll if (isnew) {
1107 1.1.1.6 skrll printf("[%s] caps 0x%x bintval %u erp 0x%x",
1108 1.1.1.6 skrll ether_sprintf(mac), sp->capinfo, sp->bintval, sp->erp);
1109 1.1.1.6 skrll if (sp->country != NULL) {
1110 1.1.1.6 skrll #ifdef __FreeBSD__
1111 1.1.1.6 skrll printf(" country info %*D",
1112 1.1.1.6 skrll sp->country[1], sp->country+2, " ");
1113 1.1.1.6 skrll #else
1114 1.1.1.6 skrll int i;
1115 1.1.1.6 skrll printf(" country info");
1116 1.1.1.6 skrll for (i = 0; i < sp->country[1]; i++)
1117 1.1.1.6 skrll printf(" %02x", sp->country[i+2]);
1118 1.1.1.6 skrll #endif
1119 1.1.1.6 skrll }
1120 1.1.1.6 skrll printf("\n");
1121 1.1.1.6 skrll }
1122 1.1.1.6 skrll }
1123 1.1.1.6 skrll #endif /* IEEE80211_DEBUG */
1124 1.1.1.6 skrll
1125 1.1.1.6 skrll static void
1126 1.1.1.6 skrll saveie(u_int8_t **iep, const u_int8_t *ie)
1127 1.1.1.6 skrll {
1128 1.1.1.6 skrll
1129 1.1.1.6 skrll if (ie == NULL)
1130 1.1.1.6 skrll *iep = NULL;
1131 1.1.1.6 skrll else
1132 1.1.1.6 skrll ieee80211_saveie(iep, ie);
1133 1.1.1.6 skrll }
1134 1.1.1.6 skrll
1135 1.1.1.6 skrll /*
1136 1.1.1.6 skrll * Process a beacon or probe response frame.
1137 1.1.1.6 skrll */
1138 1.1.1.6 skrll void
1139 1.1.1.6 skrll ieee80211_add_scan(struct ieee80211com *ic,
1140 1.1.1.6 skrll const struct ieee80211_scanparams *sp,
1141 1.1.1.6 skrll const struct ieee80211_frame *wh,
1142 1.1.1.6 skrll int subtype, int rssi, int rstamp)
1143 1.1.1.6 skrll {
1144 1.1.1.6 skrll #define ISPROBE(_st) ((_st) == IEEE80211_FC0_SUBTYPE_PROBE_RESP)
1145 1.1.1.6 skrll struct ieee80211_node_table *nt = &ic->ic_scan;
1146 1.1.1.6 skrll struct ieee80211_node *ni;
1147 1.1.1.6 skrll int newnode = 0;
1148 1.1.1.6 skrll
1149 1.1.1.6 skrll ni = ieee80211_find_node(nt, wh->i_addr2);
1150 1.1.1.6 skrll if (ni == NULL) {
1151 1.1.1.6 skrll /*
1152 1.1.1.6 skrll * Create a new entry.
1153 1.1.1.6 skrll */
1154 1.1.1.6 skrll ni = ic->ic_node_alloc(nt);
1155 1.1.1.6 skrll if (ni == NULL) {
1156 1.1.1.6 skrll ic->ic_stats.is_rx_nodealloc++;
1157 1.1.1.6 skrll return;
1158 1.1.1.6 skrll }
1159 1.1.1.6 skrll ieee80211_setup_node(nt, ni, wh->i_addr2);
1160 1.1.1.6 skrll /*
1161 1.1.1.6 skrll * XXX inherit from ic_bss.
1162 1.1.1.6 skrll */
1163 1.1.1.6 skrll ni->ni_authmode = ic->ic_bss->ni_authmode;
1164 1.1.1.6 skrll ni->ni_txpower = ic->ic_bss->ni_txpower;
1165 1.1.1.6 skrll ni->ni_vlan = ic->ic_bss->ni_vlan; /* XXX?? */
1166 1.1.1.6 skrll ieee80211_set_chan(ic, ni, ic->ic_curchan);
1167 1.1.1.6 skrll ni->ni_rsn = ic->ic_bss->ni_rsn;
1168 1.1.1.6 skrll newnode = 1;
1169 1.1.1.6 skrll }
1170 1.1.1.6 skrll #ifdef IEEE80211_DEBUG
1171 1.1.1.6 skrll if (ieee80211_msg_scan(ic) && (ic->ic_flags & IEEE80211_F_SCAN))
1172 1.1.1.6 skrll dump_probe_beacon(subtype, newnode, wh->i_addr2, sp);
1173 1.1.1.6 skrll #endif
1174 1.1.1.6 skrll /* XXX ap beaconing multiple ssid w/ same bssid */
1175 1.1.1.6 skrll if (sp->ssid[1] != 0 &&
1176 1.1.1.6 skrll (ISPROBE(subtype) || ni->ni_esslen == 0)) {
1177 1.1.1.6 skrll ni->ni_esslen = sp->ssid[1];
1178 1.1.1.6 skrll memset(ni->ni_essid, 0, sizeof(ni->ni_essid));
1179 1.1.1.6 skrll memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]);
1180 1.1.1.6 skrll }
1181 1.1.1.6 skrll ni->ni_scangen = ic->ic_scan.nt_scangen;
1182 1.1.1.6 skrll IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3);
1183 1.1.1.6 skrll ni->ni_rssi = rssi;
1184 1.1.1.6 skrll ni->ni_rstamp = rstamp;
1185 1.1.1.6 skrll memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp));
1186 1.1.1.6 skrll ni->ni_intval = sp->bintval;
1187 1.1.1.6 skrll ni->ni_capinfo = sp->capinfo;
1188 1.1.1.6 skrll ni->ni_chan = &ic->ic_channels[sp->chan];
1189 1.1.1.6 skrll ni->ni_fhdwell = sp->fhdwell;
1190 1.1.1.6 skrll ni->ni_fhindex = sp->fhindex;
1191 1.1.1.6 skrll ni->ni_erp = sp->erp;
1192 1.1.1.6 skrll if (sp->tim != NULL) {
1193 1.1.1.6 skrll struct ieee80211_tim_ie *ie =
1194 1.1.1.6 skrll (struct ieee80211_tim_ie *) sp->tim;
1195 1.1.1.6 skrll
1196 1.1.1.6 skrll ni->ni_dtim_count = ie->tim_count;
1197 1.1.1.6 skrll ni->ni_dtim_period = ie->tim_period;
1198 1.1.1.6 skrll }
1199 1.1.1.6 skrll /*
1200 1.1.1.6 skrll * Record the byte offset from the mac header to
1201 1.1.1.6 skrll * the start of the TIM information element for
1202 1.1.1.6 skrll * use by hardware and/or to speedup software
1203 1.1.1.6 skrll * processing of beacon frames.
1204 1.1.1.6 skrll */
1205 1.1.1.6 skrll ni->ni_timoff = sp->timoff;
1206 1.1.1.6 skrll /*
1207 1.1.1.6 skrll * Record optional information elements that might be
1208 1.1.1.6 skrll * used by applications or drivers.
1209 1.1.1.6 skrll */
1210 1.1.1.6 skrll saveie(&ni->ni_wme_ie, sp->wme);
1211 1.1.1.6 skrll saveie(&ni->ni_wpa_ie, sp->wpa);
1212 1.1.1.6 skrll
1213 1.1.1.6 skrll /* NB: must be after ni_chan is setup */
1214 1.1.1.6 skrll ieee80211_setup_rates(ni, sp->rates, sp->xrates, IEEE80211_F_DOSORT);
1215 1.1.1.6 skrll
1216 1.1.1.6 skrll if (!newnode)
1217 1.1.1.6 skrll ieee80211_free_node(ni);
1218 1.1.1.6 skrll #undef ISPROBE
1219 1.1.1.6 skrll }
1220 1.1.1.6 skrll
1221 1.1.1.6 skrll /*
1222 1.1.1.6 skrll * Do node discovery in adhoc mode on receipt of a beacon
1223 1.1.1.6 skrll * or probe response frame. Note that for the driver's
1224 1.1.1.6 skrll * benefit we we treat this like an association so the
1225 1.1.1.6 skrll * driver has an opportunity to setup it's private state.
1226 1.1.1.6 skrll */
1227 1.1.1.6 skrll struct ieee80211_node *
1228 1.1.1.6 skrll ieee80211_add_neighbor(struct ieee80211com *ic,
1229 1.1.1.6 skrll const struct ieee80211_frame *wh,
1230 1.1.1.6 skrll const struct ieee80211_scanparams *sp)
1231 1.1.1.6 skrll {
1232 1.1.1.6 skrll struct ieee80211_node *ni;
1233 1.1.1.6 skrll
1234 1.1.1.6 skrll ni = ieee80211_dup_bss(&ic->ic_sta, wh->i_addr2);/* XXX alloc_node? */
1235 1.1.1.6 skrll if (ni != NULL) {
1236 1.1.1.6 skrll ni->ni_esslen = sp->ssid[1];
1237 1.1.1.6 skrll memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]);
1238 1.1.1.6 skrll IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3);
1239 1.1.1.6 skrll memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp));
1240 1.1.1.6 skrll ni->ni_intval = sp->bintval;
1241 1.1.1.6 skrll ni->ni_capinfo = sp->capinfo;
1242 1.1.1.6 skrll ni->ni_chan = ic->ic_bss->ni_chan;
1243 1.1.1.6 skrll ni->ni_fhdwell = sp->fhdwell;
1244 1.1.1.6 skrll ni->ni_fhindex = sp->fhindex;
1245 1.1.1.6 skrll ni->ni_erp = sp->erp;
1246 1.1.1.6 skrll ni->ni_timoff = sp->timoff;
1247 1.1.1.6 skrll if (sp->wme != NULL)
1248 1.1.1.6 skrll ieee80211_saveie(&ni->ni_wme_ie, sp->wme);
1249 1.1.1.6 skrll if (sp->wpa != NULL)
1250 1.1.1.6 skrll ieee80211_saveie(&ni->ni_wpa_ie, sp->wpa);
1251 1.1.1.6 skrll
1252 1.1.1.6 skrll /* NB: must be after ni_chan is setup */
1253 1.1.1.6 skrll ieee80211_setup_rates(ni, sp->rates, sp->xrates, IEEE80211_F_DOSORT);
1254 1.1.1.6 skrll
1255 1.1.1.6 skrll if (ic->ic_newassoc != NULL)
1256 1.1.1.6 skrll ic->ic_newassoc(ni, 1);
1257 1.1.1.6 skrll /* XXX not right for 802.1x/WPA */
1258 1.1.1.6 skrll ieee80211_node_authorize(ni);
1259 1.1.1.6 skrll }
1260 1.1.1.6 skrll return ni;
1261 1.1.1.6 skrll }
1262 1.1.1.6 skrll
1263 1.1.1.6 skrll #define IS_CTL(wh) \
1264 1.1.1.6 skrll ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) == IEEE80211_FC0_TYPE_CTL)
1265 1.1.1.6 skrll #define IS_PSPOLL(wh) \
1266 1.1.1.6 skrll ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == IEEE80211_FC0_SUBTYPE_PS_POLL)
1267 1.1.1.4 dyoung /*
1268 1.1.1.4 dyoung * Locate the node for sender, track state, and then pass the
1269 1.1.1.4 dyoung * (referenced) node up to the 802.11 layer for its use. We
1270 1.1.1.4 dyoung * are required to pass some node so we fall back to ic_bss
1271 1.1.1.4 dyoung * when this frame is from an unknown sender. The 802.11 layer
1272 1.1.1.4 dyoung * knows this means the sender wasn't in the node table and
1273 1.1.1.4 dyoung * acts accordingly.
1274 1.1.1.4 dyoung */
1275 1.1.1.4 dyoung struct ieee80211_node *
1276 1.1.1.4 dyoung #ifdef IEEE80211_DEBUG_REFCNT
1277 1.1.1.4 dyoung ieee80211_find_rxnode_debug(struct ieee80211com *ic,
1278 1.1.1.4 dyoung const struct ieee80211_frame_min *wh, const char *func, int line)
1279 1.1.1.4 dyoung #else
1280 1.1.1.4 dyoung ieee80211_find_rxnode(struct ieee80211com *ic,
1281 1.1.1.4 dyoung const struct ieee80211_frame_min *wh)
1282 1.1.1.4 dyoung #endif
1283 1.1.1.4 dyoung {
1284 1.1.1.4 dyoung struct ieee80211_node_table *nt;
1285 1.1.1.4 dyoung struct ieee80211_node *ni;
1286 1.1.1.4 dyoung
1287 1.1.1.4 dyoung /* XXX may want scanned nodes in the neighbor table for adhoc */
1288 1.1.1.4 dyoung if (ic->ic_opmode == IEEE80211_M_STA ||
1289 1.1.1.4 dyoung ic->ic_opmode == IEEE80211_M_MONITOR ||
1290 1.1.1.4 dyoung (ic->ic_flags & IEEE80211_F_SCAN))
1291 1.1.1.4 dyoung nt = &ic->ic_scan;
1292 1.1.1.4 dyoung else
1293 1.1.1.4 dyoung nt = &ic->ic_sta;
1294 1.1.1.4 dyoung /* XXX check ic_bss first in station mode */
1295 1.1.1.4 dyoung /* XXX 4-address frames? */
1296 1.1.1.4 dyoung IEEE80211_NODE_LOCK(nt);
1297 1.1.1.4 dyoung if (IS_CTL(wh) && !IS_PSPOLL(wh) /*&& !IS_RTS(ah)*/)
1298 1.1.1.4 dyoung ni = _ieee80211_find_node(nt, wh->i_addr1);
1299 1.1.1.4 dyoung else
1300 1.1.1.4 dyoung ni = _ieee80211_find_node(nt, wh->i_addr2);
1301 1.1.1.6 skrll if (ni == NULL)
1302 1.1.1.6 skrll ni = ieee80211_ref_node(ic->ic_bss);
1303 1.1.1.6 skrll IEEE80211_NODE_UNLOCK(nt);
1304 1.1.1.6 skrll
1305 1.1.1.6 skrll return ni;
1306 1.1.1.6 skrll }
1307 1.1.1.6 skrll
1308 1.1.1.6 skrll /*
1309 1.1.1.6 skrll * Like ieee80211_find_rxnode but use the supplied h/w
1310 1.1.1.6 skrll * key index as a hint to locate the node in the key
1311 1.1.1.6 skrll * mapping table. If an entry is present at the key
1312 1.1.1.6 skrll * index we return it; otherwise do a normal lookup and
1313 1.1.1.6 skrll * update the mapping table if the station has a unicast
1314 1.1.1.6 skrll * key assigned to it.
1315 1.1.1.6 skrll */
1316 1.1.1.6 skrll struct ieee80211_node *
1317 1.1.1.6 skrll #ifdef IEEE80211_DEBUG_REFCNT
1318 1.1.1.6 skrll ieee80211_find_rxnode_withkey_debug(struct ieee80211com *ic,
1319 1.1.1.6 skrll const struct ieee80211_frame_min *wh, ieee80211_keyix keyix,
1320 1.1.1.6 skrll const char *func, int line)
1321 1.1.1.6 skrll #else
1322 1.1.1.6 skrll ieee80211_find_rxnode_withkey(struct ieee80211com *ic,
1323 1.1.1.6 skrll const struct ieee80211_frame_min *wh, ieee80211_keyix keyix)
1324 1.1.1.6 skrll #endif
1325 1.1.1.6 skrll {
1326 1.1.1.6 skrll struct ieee80211_node_table *nt;
1327 1.1.1.6 skrll struct ieee80211_node *ni;
1328 1.1.1.6 skrll
1329 1.1.1.6 skrll if (ic->ic_opmode == IEEE80211_M_STA ||
1330 1.1.1.6 skrll ic->ic_opmode == IEEE80211_M_MONITOR ||
1331 1.1.1.6 skrll (ic->ic_flags & IEEE80211_F_SCAN))
1332 1.1.1.6 skrll nt = &ic->ic_scan;
1333 1.1.1.6 skrll else
1334 1.1.1.6 skrll nt = &ic->ic_sta;
1335 1.1.1.6 skrll IEEE80211_NODE_LOCK(nt);
1336 1.1.1.6 skrll if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax)
1337 1.1.1.6 skrll ni = nt->nt_keyixmap[keyix];
1338 1.1.1.6 skrll else
1339 1.1.1.6 skrll ni = NULL;
1340 1.1.1.6 skrll if (ni == NULL) {
1341 1.1.1.6 skrll if (IS_CTL(wh) && !IS_PSPOLL(wh) /*&& !IS_RTS(ah)*/)
1342 1.1.1.6 skrll ni = _ieee80211_find_node(nt, wh->i_addr1);
1343 1.1.1.6 skrll else
1344 1.1.1.6 skrll ni = _ieee80211_find_node(nt, wh->i_addr2);
1345 1.1.1.6 skrll if (ni == NULL)
1346 1.1.1.6 skrll ni = ieee80211_ref_node(ic->ic_bss);
1347 1.1.1.6 skrll if (nt->nt_keyixmap != NULL) {
1348 1.1.1.6 skrll /*
1349 1.1.1.6 skrll * If the station has a unicast key cache slot
1350 1.1.1.6 skrll * assigned update the key->node mapping table.
1351 1.1.1.6 skrll */
1352 1.1.1.6 skrll keyix = ni->ni_ucastkey.wk_rxkeyix;
1353 1.1.1.6 skrll /* XXX can keyixmap[keyix] != NULL? */
1354 1.1.1.6 skrll if (keyix < nt->nt_keyixmax &&
1355 1.1.1.6 skrll nt->nt_keyixmap[keyix] == NULL) {
1356 1.1.1.6 skrll IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE,
1357 1.1.1.6 skrll "%s: add key map entry %p<%s> refcnt %d\n",
1358 1.1.1.6 skrll __func__, ni, ether_sprintf(ni->ni_macaddr),
1359 1.1.1.6 skrll ieee80211_node_refcnt(ni)+1);
1360 1.1.1.6 skrll nt->nt_keyixmap[keyix] = ieee80211_ref_node(ni);
1361 1.1.1.6 skrll }
1362 1.1.1.6 skrll }
1363 1.1.1.6 skrll } else {
1364 1.1.1.6 skrll ieee80211_ref_node(ni);
1365 1.1.1.6 skrll }
1366 1.1.1.4 dyoung IEEE80211_NODE_UNLOCK(nt);
1367 1.1.1.4 dyoung
1368 1.1.1.6 skrll return ni;
1369 1.1.1.6 skrll }
1370 1.1.1.4 dyoung #undef IS_PSPOLL
1371 1.1.1.4 dyoung #undef IS_CTL
1372 1.1.1.4 dyoung
1373 1.1.1.4 dyoung /*
1374 1.1.1.3 dyoung * Return a reference to the appropriate node for sending
1375 1.1.1.3 dyoung * a data frame. This handles node discovery in adhoc networks.
1376 1.1.1.3 dyoung */
1377 1.1.1.3 dyoung struct ieee80211_node *
1378 1.1.1.4 dyoung #ifdef IEEE80211_DEBUG_REFCNT
1379 1.1.1.4 dyoung ieee80211_find_txnode_debug(struct ieee80211com *ic, const u_int8_t *macaddr,
1380 1.1.1.4 dyoung const char *func, int line)
1381 1.1.1.4 dyoung #else
1382 1.1.1.4 dyoung ieee80211_find_txnode(struct ieee80211com *ic, const u_int8_t *macaddr)
1383 1.1.1.4 dyoung #endif
1384 1.1.1.3 dyoung {
1385 1.1.1.4 dyoung struct ieee80211_node_table *nt = &ic->ic_sta;
1386 1.1.1.3 dyoung struct ieee80211_node *ni;
1387 1.1.1.3 dyoung
1388 1.1.1.3 dyoung /*
1389 1.1.1.3 dyoung * The destination address should be in the node table
1390 1.1.1.6 skrll * unless this is a multicast/broadcast frame. We can
1391 1.1.1.6 skrll * also optimize station mode operation, all frames go
1392 1.1.1.6 skrll * to the bss node.
1393 1.1.1.3 dyoung */
1394 1.1.1.3 dyoung /* XXX can't hold lock across dup_bss 'cuz of recursive locking */
1395 1.1.1.4 dyoung IEEE80211_NODE_LOCK(nt);
1396 1.1.1.6 skrll if (ic->ic_opmode == IEEE80211_M_STA || IEEE80211_IS_MULTICAST(macaddr))
1397 1.1.1.6 skrll ni = ieee80211_ref_node(ic->ic_bss);
1398 1.1.1.6 skrll else
1399 1.1.1.6 skrll ni = _ieee80211_find_node(nt, macaddr);
1400 1.1.1.4 dyoung IEEE80211_NODE_UNLOCK(nt);
1401 1.1.1.4 dyoung
1402 1.1.1.4 dyoung if (ni == NULL) {
1403 1.1.1.4 dyoung if (ic->ic_opmode == IEEE80211_M_IBSS ||
1404 1.1.1.4 dyoung ic->ic_opmode == IEEE80211_M_AHDEMO) {
1405 1.1.1.4 dyoung /*
1406 1.1.1.4 dyoung * In adhoc mode cons up a node for the destination.
1407 1.1.1.4 dyoung * Note that we need an additional reference for the
1408 1.1.1.4 dyoung * caller to be consistent with _ieee80211_find_node.
1409 1.1.1.4 dyoung */
1410 1.1.1.4 dyoung ni = ieee80211_fakeup_adhoc_node(nt, macaddr);
1411 1.1.1.4 dyoung if (ni != NULL)
1412 1.1.1.4 dyoung (void) ieee80211_ref_node(ni);
1413 1.1.1.4 dyoung } else {
1414 1.1.1.4 dyoung IEEE80211_DPRINTF(ic, IEEE80211_MSG_OUTPUT,
1415 1.1.1.4 dyoung "[%s] no node, discard frame (%s)\n",
1416 1.1.1.4 dyoung ether_sprintf(macaddr), __func__);
1417 1.1.1.4 dyoung ic->ic_stats.is_tx_nonode++;
1418 1.1.1.3 dyoung }
1419 1.1.1.3 dyoung }
1420 1.1.1.3 dyoung return ni;
1421 1.1.1.3 dyoung }
1422 1.1.1.3 dyoung
1423 1.1.1.3 dyoung /*
1424 1.1 dyoung * Like find but search based on the channel too.
1425 1.1 dyoung */
1426 1.1 dyoung struct ieee80211_node *
1427 1.1.1.4 dyoung #ifdef IEEE80211_DEBUG_REFCNT
1428 1.1.1.4 dyoung ieee80211_find_node_with_channel_debug(struct ieee80211_node_table *nt,
1429 1.1.1.4 dyoung const u_int8_t *macaddr, struct ieee80211_channel *chan,
1430 1.1.1.4 dyoung const char *func, int line)
1431 1.1.1.4 dyoung #else
1432 1.1.1.4 dyoung ieee80211_find_node_with_channel(struct ieee80211_node_table *nt,
1433 1.1.1.4 dyoung const u_int8_t *macaddr, struct ieee80211_channel *chan)
1434 1.1.1.4 dyoung #endif
1435 1.1 dyoung {
1436 1.1 dyoung struct ieee80211_node *ni;
1437 1.1 dyoung int hash;
1438 1.1 dyoung
1439 1.1 dyoung hash = IEEE80211_NODE_HASH(macaddr);
1440 1.1.1.4 dyoung IEEE80211_NODE_LOCK(nt);
1441 1.1.1.4 dyoung LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) {
1442 1.1.1.3 dyoung if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr) &&
1443 1.1.1.3 dyoung ni->ni_chan == chan) {
1444 1.1.1.4 dyoung ieee80211_ref_node(ni); /* mark referenced */
1445 1.1.1.4 dyoung IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE,
1446 1.1.1.4 dyoung #ifdef IEEE80211_DEBUG_REFCNT
1447 1.1.1.4 dyoung "%s (%s:%u) %p<%s> refcnt %d\n", __func__,
1448 1.1.1.4 dyoung func, line,
1449 1.1.1.4 dyoung #else
1450 1.1.1.4 dyoung "%s %p<%s> refcnt %d\n", __func__,
1451 1.1.1.4 dyoung #endif
1452 1.1.1.4 dyoung ni, ether_sprintf(ni->ni_macaddr),
1453 1.1.1.4 dyoung ieee80211_node_refcnt(ni));
1454 1.1 dyoung break;
1455 1.1 dyoung }
1456 1.1 dyoung }
1457 1.1.1.4 dyoung IEEE80211_NODE_UNLOCK(nt);
1458 1.1.1.4 dyoung return ni;
1459 1.1.1.4 dyoung }
1460 1.1.1.4 dyoung
1461 1.1.1.4 dyoung /*
1462 1.1.1.4 dyoung * Like find but search based on the ssid too.
1463 1.1.1.4 dyoung */
1464 1.1.1.4 dyoung struct ieee80211_node *
1465 1.1.1.4 dyoung #ifdef IEEE80211_DEBUG_REFCNT
1466 1.1.1.4 dyoung ieee80211_find_node_with_ssid_debug(struct ieee80211_node_table *nt,
1467 1.1.1.4 dyoung const u_int8_t *macaddr, u_int ssidlen, const u_int8_t *ssid,
1468 1.1.1.4 dyoung const char *func, int line)
1469 1.1.1.4 dyoung #else
1470 1.1.1.4 dyoung ieee80211_find_node_with_ssid(struct ieee80211_node_table *nt,
1471 1.1.1.4 dyoung const u_int8_t *macaddr, u_int ssidlen, const u_int8_t *ssid)
1472 1.1.1.4 dyoung #endif
1473 1.1.1.4 dyoung {
1474 1.1.1.5 dyoung #define MATCH_SSID(ni, ssid, ssidlen) \
1475 1.1.1.5 dyoung (ni->ni_esslen == ssidlen && memcmp(ni->ni_essid, ssid, ssidlen) == 0)
1476 1.1.1.5 dyoung static const u_int8_t zeromac[IEEE80211_ADDR_LEN];
1477 1.1.1.4 dyoung struct ieee80211com *ic = nt->nt_ic;
1478 1.1.1.4 dyoung struct ieee80211_node *ni;
1479 1.1.1.4 dyoung int hash;
1480 1.1.1.4 dyoung
1481 1.1.1.4 dyoung IEEE80211_NODE_LOCK(nt);
1482 1.1.1.5 dyoung /*
1483 1.1.1.5 dyoung * A mac address that is all zero means match only the ssid;
1484 1.1.1.5 dyoung * otherwise we must match both.
1485 1.1.1.5 dyoung */
1486 1.1.1.5 dyoung if (IEEE80211_ADDR_EQ(macaddr, zeromac)) {
1487 1.1.1.5 dyoung TAILQ_FOREACH(ni, &nt->nt_node, ni_list) {
1488 1.1.1.5 dyoung if (MATCH_SSID(ni, ssid, ssidlen))
1489 1.1.1.5 dyoung break;
1490 1.1.1.5 dyoung }
1491 1.1.1.5 dyoung } else {
1492 1.1.1.5 dyoung hash = IEEE80211_NODE_HASH(macaddr);
1493 1.1.1.5 dyoung LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) {
1494 1.1.1.5 dyoung if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr) &&
1495 1.1.1.5 dyoung MATCH_SSID(ni, ssid, ssidlen))
1496 1.1.1.5 dyoung break;
1497 1.1.1.5 dyoung }
1498 1.1.1.5 dyoung }
1499 1.1.1.5 dyoung if (ni != NULL) {
1500 1.1.1.5 dyoung ieee80211_ref_node(ni); /* mark referenced */
1501 1.1.1.5 dyoung IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE,
1502 1.1.1.4 dyoung #ifdef IEEE80211_DEBUG_REFCNT
1503 1.1.1.5 dyoung "%s (%s:%u) %p<%s> refcnt %d\n", __func__,
1504 1.1.1.5 dyoung func, line,
1505 1.1.1.4 dyoung #else
1506 1.1.1.5 dyoung "%s %p<%s> refcnt %d\n", __func__,
1507 1.1.1.4 dyoung #endif
1508 1.1.1.5 dyoung ni, ether_sprintf(ni->ni_macaddr),
1509 1.1.1.5 dyoung ieee80211_node_refcnt(ni));
1510 1.1.1.4 dyoung }
1511 1.1.1.4 dyoung IEEE80211_NODE_UNLOCK(nt);
1512 1.1 dyoung return ni;
1513 1.1.1.5 dyoung #undef MATCH_SSID
1514 1.1 dyoung }
1515 1.1 dyoung
1516 1.1 dyoung static void
1517 1.1.1.4 dyoung _ieee80211_free_node(struct ieee80211_node *ni)
1518 1.1 dyoung {
1519 1.1.1.4 dyoung struct ieee80211com *ic = ni->ni_ic;
1520 1.1.1.4 dyoung struct ieee80211_node_table *nt = ni->ni_table;
1521 1.1 dyoung
1522 1.1.1.4 dyoung IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE,
1523 1.1.1.4 dyoung "%s %p<%s> in %s table\n", __func__, ni,
1524 1.1.1.4 dyoung ether_sprintf(ni->ni_macaddr),
1525 1.1.1.4 dyoung nt != NULL ? nt->nt_name : "<gone>");
1526 1.1.1.4 dyoung
1527 1.1.1.4 dyoung IEEE80211_AID_CLR(ni->ni_associd, ic->ic_aid_bitmap);
1528 1.1.1.4 dyoung if (nt != NULL) {
1529 1.1.1.4 dyoung TAILQ_REMOVE(&nt->nt_node, ni, ni_list);
1530 1.1.1.4 dyoung LIST_REMOVE(ni, ni_hash);
1531 1.1.1.4 dyoung }
1532 1.1.1.4 dyoung ic->ic_node_free(ni);
1533 1.1 dyoung }
1534 1.1 dyoung
1535 1.1 dyoung void
1536 1.1.1.4 dyoung #ifdef IEEE80211_DEBUG_REFCNT
1537 1.1.1.4 dyoung ieee80211_free_node_debug(struct ieee80211_node *ni, const char *func, int line)
1538 1.1.1.4 dyoung #else
1539 1.1.1.4 dyoung ieee80211_free_node(struct ieee80211_node *ni)
1540 1.1.1.4 dyoung #endif
1541 1.1 dyoung {
1542 1.1.1.4 dyoung struct ieee80211_node_table *nt = ni->ni_table;
1543 1.1 dyoung
1544 1.1.1.4 dyoung #ifdef IEEE80211_DEBUG_REFCNT
1545 1.1.1.4 dyoung IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE,
1546 1.1.1.4 dyoung "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni,
1547 1.1.1.4 dyoung ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1);
1548 1.1.1.4 dyoung #endif
1549 1.1.1.6 skrll if (nt != NULL) {
1550 1.1.1.6 skrll IEEE80211_NODE_LOCK(nt);
1551 1.1.1.6 skrll if (ieee80211_node_dectestref(ni)) {
1552 1.1.1.6 skrll /*
1553 1.1.1.6 skrll * Last reference, reclaim state.
1554 1.1.1.6 skrll */
1555 1.1.1.4 dyoung _ieee80211_free_node(ni);
1556 1.1.1.6 skrll } else if (ieee80211_node_refcnt(ni) == 1 &&
1557 1.1.1.6 skrll nt->nt_keyixmap != NULL) {
1558 1.1.1.6 skrll ieee80211_keyix keyix;
1559 1.1.1.6 skrll /*
1560 1.1.1.6 skrll * Check for a last reference in the key mapping table.
1561 1.1.1.6 skrll */
1562 1.1.1.6 skrll keyix = ni->ni_ucastkey.wk_rxkeyix;
1563 1.1.1.6 skrll if (keyix < nt->nt_keyixmax &&
1564 1.1.1.6 skrll nt->nt_keyixmap[keyix] == ni) {
1565 1.1.1.6 skrll IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE,
1566 1.1.1.6 skrll "%s: %p<%s> clear key map entry", __func__,
1567 1.1.1.6 skrll ni, ether_sprintf(ni->ni_macaddr));
1568 1.1.1.6 skrll nt->nt_keyixmap[keyix] = NULL;
1569 1.1.1.6 skrll ieee80211_node_decref(ni); /* XXX needed? */
1570 1.1.1.6 skrll _ieee80211_free_node(ni);
1571 1.1.1.6 skrll }
1572 1.1.1.6 skrll }
1573 1.1.1.6 skrll IEEE80211_NODE_UNLOCK(nt);
1574 1.1.1.6 skrll } else {
1575 1.1.1.6 skrll if (ieee80211_node_dectestref(ni))
1576 1.1.1.4 dyoung _ieee80211_free_node(ni);
1577 1.1 dyoung }
1578 1.1 dyoung }
1579 1.1 dyoung
1580 1.1.1.4 dyoung /*
1581 1.1.1.6 skrll * Reclaim a unicast key and clear any key cache state.
1582 1.1.1.6 skrll */
1583 1.1.1.6 skrll int
1584 1.1.1.6 skrll ieee80211_node_delucastkey(struct ieee80211_node *ni)
1585 1.1.1.6 skrll {
1586 1.1.1.6 skrll struct ieee80211com *ic = ni->ni_ic;
1587 1.1.1.6 skrll struct ieee80211_node_table *nt = &ic->ic_sta;
1588 1.1.1.6 skrll struct ieee80211_node *nikey;
1589 1.1.1.6 skrll ieee80211_keyix keyix;
1590 1.1.1.6 skrll int isowned, status;
1591 1.1.1.6 skrll
1592 1.1.1.6 skrll /*
1593 1.1.1.6 skrll * NB: We must beware of LOR here; deleting the key
1594 1.1.1.6 skrll * can cause the crypto layer to block traffic updates
1595 1.1.1.6 skrll * which can generate a LOR against the node table lock;
1596 1.1.1.6 skrll * grab it here and stash the key index for our use below.
1597 1.1.1.6 skrll *
1598 1.1.1.6 skrll * Must also beware of recursion on the node table lock.
1599 1.1.1.6 skrll * When called from node_cleanup we may already have
1600 1.1.1.6 skrll * the node table lock held. Unfortunately there's no
1601 1.1.1.6 skrll * way to separate out this path so we must do this
1602 1.1.1.6 skrll * conditionally.
1603 1.1.1.6 skrll */
1604 1.1.1.6 skrll isowned = IEEE80211_NODE_IS_LOCKED(nt);
1605 1.1.1.6 skrll if (!isowned)
1606 1.1.1.6 skrll IEEE80211_NODE_LOCK(nt);
1607 1.1.1.6 skrll keyix = ni->ni_ucastkey.wk_rxkeyix;
1608 1.1.1.6 skrll status = ieee80211_crypto_delkey(ic, &ni->ni_ucastkey);
1609 1.1.1.6 skrll if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) {
1610 1.1.1.6 skrll nikey = nt->nt_keyixmap[keyix];
1611 1.1.1.6 skrll nt->nt_keyixmap[keyix] = NULL;;
1612 1.1.1.6 skrll } else
1613 1.1.1.6 skrll nikey = NULL;
1614 1.1.1.6 skrll if (!isowned)
1615 1.1.1.6 skrll IEEE80211_NODE_UNLOCK(&ic->ic_sta);
1616 1.1.1.6 skrll
1617 1.1.1.6 skrll if (nikey != NULL) {
1618 1.1.1.6 skrll KASSERT(nikey == ni,
1619 1.1.1.6 skrll ("key map out of sync, ni %p nikey %p", ni, nikey));
1620 1.1.1.6 skrll IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE,
1621 1.1.1.6 skrll "%s: delete key map entry %p<%s> refcnt %d\n",
1622 1.1.1.6 skrll __func__, ni, ether_sprintf(ni->ni_macaddr),
1623 1.1.1.6 skrll ieee80211_node_refcnt(ni)-1);
1624 1.1.1.6 skrll ieee80211_free_node(ni);
1625 1.1.1.6 skrll }
1626 1.1.1.6 skrll return status;
1627 1.1.1.6 skrll }
1628 1.1.1.6 skrll
1629 1.1.1.6 skrll /*
1630 1.1.1.4 dyoung * Reclaim a node. If this is the last reference count then
1631 1.1.1.4 dyoung * do the normal free work. Otherwise remove it from the node
1632 1.1.1.4 dyoung * table and mark it gone by clearing the back-reference.
1633 1.1.1.4 dyoung */
1634 1.1.1.4 dyoung static void
1635 1.1.1.4 dyoung node_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni)
1636 1.1.1.4 dyoung {
1637 1.1.1.6 skrll ieee80211_keyix keyix;
1638 1.1.1.6 skrll
1639 1.1.1.6 skrll IEEE80211_NODE_LOCK_ASSERT(nt);
1640 1.1.1.4 dyoung
1641 1.1.1.4 dyoung IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE,
1642 1.1.1.4 dyoung "%s: remove %p<%s> from %s table, refcnt %d\n",
1643 1.1.1.4 dyoung __func__, ni, ether_sprintf(ni->ni_macaddr),
1644 1.1.1.4 dyoung nt->nt_name, ieee80211_node_refcnt(ni)-1);
1645 1.1.1.6 skrll /*
1646 1.1.1.6 skrll * Clear any entry in the unicast key mapping table.
1647 1.1.1.6 skrll * We need to do it here so rx lookups don't find it
1648 1.1.1.6 skrll * in the mapping table even if it's not in the hash
1649 1.1.1.6 skrll * table. We cannot depend on the mapping table entry
1650 1.1.1.6 skrll * being cleared because the node may not be free'd.
1651 1.1.1.6 skrll */
1652 1.1.1.6 skrll keyix = ni->ni_ucastkey.wk_rxkeyix;
1653 1.1.1.6 skrll if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax &&
1654 1.1.1.6 skrll nt->nt_keyixmap[keyix] == ni) {
1655 1.1.1.6 skrll IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE,
1656 1.1.1.6 skrll "%s: %p<%s> clear key map entry\n",
1657 1.1.1.6 skrll __func__, ni, ether_sprintf(ni->ni_macaddr));
1658 1.1.1.6 skrll nt->nt_keyixmap[keyix] = NULL;
1659 1.1.1.6 skrll ieee80211_node_decref(ni); /* NB: don't need free */
1660 1.1.1.6 skrll }
1661 1.1.1.4 dyoung if (!ieee80211_node_dectestref(ni)) {
1662 1.1.1.4 dyoung /*
1663 1.1.1.4 dyoung * Other references are present, just remove the
1664 1.1.1.4 dyoung * node from the table so it cannot be found. When
1665 1.1.1.4 dyoung * the references are dropped storage will be
1666 1.1.1.4 dyoung * reclaimed.
1667 1.1.1.4 dyoung */
1668 1.1.1.4 dyoung TAILQ_REMOVE(&nt->nt_node, ni, ni_list);
1669 1.1.1.4 dyoung LIST_REMOVE(ni, ni_hash);
1670 1.1.1.4 dyoung ni->ni_table = NULL; /* clear reference */
1671 1.1.1.4 dyoung } else
1672 1.1.1.4 dyoung _ieee80211_free_node(ni);
1673 1.1.1.4 dyoung }
1674 1.1.1.4 dyoung
1675 1.1.1.4 dyoung static void
1676 1.1.1.4 dyoung ieee80211_free_allnodes_locked(struct ieee80211_node_table *nt)
1677 1.1 dyoung {
1678 1.1.1.4 dyoung struct ieee80211com *ic = nt->nt_ic;
1679 1.1 dyoung struct ieee80211_node *ni;
1680 1.1 dyoung
1681 1.1.1.4 dyoung IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE,
1682 1.1.1.4 dyoung "%s: free all nodes in %s table\n", __func__, nt->nt_name);
1683 1.1.1.4 dyoung
1684 1.1.1.4 dyoung while ((ni = TAILQ_FIRST(&nt->nt_node)) != NULL) {
1685 1.1.1.4 dyoung if (ni->ni_associd != 0) {
1686 1.1.1.4 dyoung if (ic->ic_auth->ia_node_leave != NULL)
1687 1.1.1.4 dyoung ic->ic_auth->ia_node_leave(ic, ni);
1688 1.1.1.4 dyoung IEEE80211_AID_CLR(ni->ni_associd, ic->ic_aid_bitmap);
1689 1.1.1.4 dyoung }
1690 1.1.1.4 dyoung node_reclaim(nt, ni);
1691 1.1.1.4 dyoung }
1692 1.1.1.4 dyoung ieee80211_reset_erp(ic);
1693 1.1.1.4 dyoung }
1694 1.1.1.4 dyoung
1695 1.1.1.4 dyoung static void
1696 1.1.1.4 dyoung ieee80211_free_allnodes(struct ieee80211_node_table *nt)
1697 1.1.1.4 dyoung {
1698 1.1.1.4 dyoung
1699 1.1.1.4 dyoung IEEE80211_NODE_LOCK(nt);
1700 1.1.1.4 dyoung ieee80211_free_allnodes_locked(nt);
1701 1.1.1.4 dyoung IEEE80211_NODE_UNLOCK(nt);
1702 1.1 dyoung }
1703 1.1 dyoung
1704 1.1.1.2 dyoung /*
1705 1.1.1.4 dyoung * Timeout entries in the scan cache.
1706 1.1.1.4 dyoung */
1707 1.1.1.4 dyoung static void
1708 1.1.1.4 dyoung ieee80211_timeout_scan_candidates(struct ieee80211_node_table *nt)
1709 1.1.1.4 dyoung {
1710 1.1.1.4 dyoung struct ieee80211com *ic = nt->nt_ic;
1711 1.1.1.4 dyoung struct ieee80211_node *ni, *tni;
1712 1.1.1.4 dyoung
1713 1.1.1.4 dyoung IEEE80211_NODE_LOCK(nt);
1714 1.1.1.4 dyoung ni = ic->ic_bss;
1715 1.1.1.4 dyoung /* XXX belongs elsewhere */
1716 1.1.1.4 dyoung if (ni->ni_rxfrag[0] != NULL && ticks > ni->ni_rxfragstamp + hz) {
1717 1.1.1.4 dyoung m_freem(ni->ni_rxfrag[0]);
1718 1.1.1.4 dyoung ni->ni_rxfrag[0] = NULL;
1719 1.1.1.4 dyoung }
1720 1.1.1.4 dyoung TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, tni) {
1721 1.1.1.4 dyoung if (ni->ni_inact && --ni->ni_inact == 0) {
1722 1.1.1.4 dyoung IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE,
1723 1.1.1.4 dyoung "[%s] scan candidate purged from cache "
1724 1.1.1.4 dyoung "(refcnt %u)\n", ether_sprintf(ni->ni_macaddr),
1725 1.1.1.4 dyoung ieee80211_node_refcnt(ni));
1726 1.1.1.4 dyoung node_reclaim(nt, ni);
1727 1.1.1.4 dyoung }
1728 1.1.1.4 dyoung }
1729 1.1.1.4 dyoung IEEE80211_NODE_UNLOCK(nt);
1730 1.1.1.4 dyoung
1731 1.1.1.4 dyoung nt->nt_inact_timer = IEEE80211_INACT_WAIT;
1732 1.1.1.4 dyoung }
1733 1.1.1.4 dyoung
1734 1.1.1.4 dyoung /*
1735 1.1.1.4 dyoung * Timeout inactive stations and do related housekeeping.
1736 1.1.1.4 dyoung * Note that we cannot hold the node lock while sending a
1737 1.1.1.4 dyoung * frame as this would lead to a LOR. Instead we use a
1738 1.1.1.4 dyoung * generation number to mark nodes that we've scanned and
1739 1.1.1.4 dyoung * drop the lock and restart a scan if we have to time out
1740 1.1.1.4 dyoung * a node. Since we are single-threaded by virtue of
1741 1.1.1.2 dyoung * controlling the inactivity timer we can be sure this will
1742 1.1.1.2 dyoung * process each node only once.
1743 1.1.1.2 dyoung */
1744 1.1.1.4 dyoung static void
1745 1.1.1.4 dyoung ieee80211_timeout_stations(struct ieee80211_node_table *nt)
1746 1.1 dyoung {
1747 1.1.1.4 dyoung struct ieee80211com *ic = nt->nt_ic;
1748 1.1.1.2 dyoung struct ieee80211_node *ni;
1749 1.1.1.4 dyoung u_int gen;
1750 1.1.1.6 skrll int isadhoc;
1751 1.1 dyoung
1752 1.1.1.6 skrll isadhoc = (ic->ic_opmode == IEEE80211_M_IBSS ||
1753 1.1.1.6 skrll ic->ic_opmode == IEEE80211_M_AHDEMO);
1754 1.1.1.4 dyoung IEEE80211_SCAN_LOCK(nt);
1755 1.1.1.4 dyoung gen = nt->nt_scangen++;
1756 1.1.1.4 dyoung IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE,
1757 1.1.1.4 dyoung "%s: %s scangen %u\n", __func__, nt->nt_name, gen);
1758 1.1.1.2 dyoung restart:
1759 1.1.1.4 dyoung IEEE80211_NODE_LOCK(nt);
1760 1.1.1.4 dyoung TAILQ_FOREACH(ni, &nt->nt_node, ni_list) {
1761 1.1.1.2 dyoung if (ni->ni_scangen == gen) /* previously handled */
1762 1.1.1.2 dyoung continue;
1763 1.1.1.2 dyoung ni->ni_scangen = gen;
1764 1.1.1.4 dyoung /*
1765 1.1.1.5 dyoung * Ignore entries for which have yet to receive an
1766 1.1.1.5 dyoung * authentication frame. These are transient and
1767 1.1.1.5 dyoung * will be reclaimed when the last reference to them
1768 1.1.1.5 dyoung * goes away (when frame xmits complete).
1769 1.1.1.5 dyoung */
1770 1.1.1.6 skrll if (ic->ic_opmode == IEEE80211_M_HOSTAP &&
1771 1.1.1.6 skrll (ni->ni_flags & IEEE80211_NODE_AREF) == 0)
1772 1.1.1.5 dyoung continue;
1773 1.1.1.5 dyoung /*
1774 1.1.1.4 dyoung * Free fragment if not needed anymore
1775 1.1.1.4 dyoung * (last fragment older than 1s).
1776 1.1.1.4 dyoung * XXX doesn't belong here
1777 1.1.1.4 dyoung */
1778 1.1.1.4 dyoung if (ni->ni_rxfrag[0] != NULL &&
1779 1.1.1.4 dyoung ticks > ni->ni_rxfragstamp + hz) {
1780 1.1.1.4 dyoung m_freem(ni->ni_rxfrag[0]);
1781 1.1.1.4 dyoung ni->ni_rxfrag[0] = NULL;
1782 1.1.1.4 dyoung }
1783 1.1.1.4 dyoung /*
1784 1.1.1.4 dyoung * Special case ourself; we may be idle for extended periods
1785 1.1.1.4 dyoung * of time and regardless reclaiming our state is wrong.
1786 1.1.1.4 dyoung */
1787 1.1.1.4 dyoung if (ni == ic->ic_bss)
1788 1.1.1.4 dyoung continue;
1789 1.1.1.4 dyoung ni->ni_inact--;
1790 1.1.1.6 skrll if (ni->ni_associd != 0 || isadhoc) {
1791 1.1 dyoung /*
1792 1.1.1.4 dyoung * Age frames on the power save queue. The
1793 1.1.1.4 dyoung * aging interval is 4 times the listen
1794 1.1.1.4 dyoung * interval specified by the station. This
1795 1.1.1.4 dyoung * number is factored into the age calculations
1796 1.1.1.4 dyoung * when the frame is placed on the queue. We
1797 1.1.1.4 dyoung * store ages as time differences we can check
1798 1.1.1.4 dyoung * and/or adjust only the head of the list.
1799 1.1.1.4 dyoung */
1800 1.1.1.4 dyoung if (IEEE80211_NODE_SAVEQ_QLEN(ni) != 0) {
1801 1.1.1.4 dyoung struct mbuf *m;
1802 1.1.1.4 dyoung int discard = 0;
1803 1.1.1.4 dyoung
1804 1.1.1.4 dyoung IEEE80211_NODE_SAVEQ_LOCK(ni);
1805 1.1.1.4 dyoung while (IF_POLL(&ni->ni_savedq, m) != NULL &&
1806 1.1.1.4 dyoung M_AGE_GET(m) < IEEE80211_INACT_WAIT) {
1807 1.1.1.4 dyoung IEEE80211_DPRINTF(ic, IEEE80211_MSG_POWER, "[%s] discard frame, age %u\n", ether_sprintf(ni->ni_macaddr), M_AGE_GET(m));/*XXX*/
1808 1.1.1.4 dyoung _IEEE80211_NODE_SAVEQ_DEQUEUE_HEAD(ni, m);
1809 1.1.1.4 dyoung m_freem(m);
1810 1.1.1.4 dyoung discard++;
1811 1.1.1.4 dyoung }
1812 1.1.1.4 dyoung if (m != NULL)
1813 1.1.1.4 dyoung M_AGE_SUB(m, IEEE80211_INACT_WAIT);
1814 1.1.1.4 dyoung IEEE80211_NODE_SAVEQ_UNLOCK(ni);
1815 1.1.1.4 dyoung
1816 1.1.1.4 dyoung if (discard != 0) {
1817 1.1.1.4 dyoung IEEE80211_DPRINTF(ic,
1818 1.1.1.4 dyoung IEEE80211_MSG_POWER,
1819 1.1.1.4 dyoung "[%s] discard %u frames for age\n",
1820 1.1.1.4 dyoung ether_sprintf(ni->ni_macaddr),
1821 1.1.1.4 dyoung discard);
1822 1.1.1.4 dyoung IEEE80211_NODE_STAT_ADD(ni,
1823 1.1.1.4 dyoung ps_discard, discard);
1824 1.1.1.4 dyoung if (IEEE80211_NODE_SAVEQ_QLEN(ni) == 0)
1825 1.1.1.6 skrll ic->ic_set_tim(ni, 0);
1826 1.1.1.4 dyoung }
1827 1.1.1.4 dyoung }
1828 1.1.1.4 dyoung /*
1829 1.1.1.4 dyoung * Probe the station before time it out. We
1830 1.1.1.4 dyoung * send a null data frame which may not be
1831 1.1.1.4 dyoung * universally supported by drivers (need it
1832 1.1.1.4 dyoung * for ps-poll support so it should be...).
1833 1.1.1.4 dyoung */
1834 1.1.1.4 dyoung if (0 < ni->ni_inact &&
1835 1.1.1.4 dyoung ni->ni_inact <= ic->ic_inact_probe) {
1836 1.1.1.6 skrll IEEE80211_NOTE(ic,
1837 1.1.1.6 skrll IEEE80211_MSG_INACT | IEEE80211_MSG_NODE,
1838 1.1.1.6 skrll ni, "%s",
1839 1.1.1.6 skrll "probe station due to inactivity");
1840 1.1.1.6 skrll /*
1841 1.1.1.6 skrll * Grab a reference before unlocking the table
1842 1.1.1.6 skrll * so the node cannot be reclaimed before we
1843 1.1.1.6 skrll * send the frame. ieee80211_send_nulldata
1844 1.1.1.6 skrll * understands we've done this and reclaims the
1845 1.1.1.6 skrll * ref for us as needed.
1846 1.1.1.6 skrll */
1847 1.1.1.6 skrll ieee80211_ref_node(ni);
1848 1.1.1.4 dyoung IEEE80211_NODE_UNLOCK(nt);
1849 1.1.1.6 skrll ieee80211_send_nulldata(ni);
1850 1.1.1.4 dyoung /* XXX stat? */
1851 1.1.1.4 dyoung goto restart;
1852 1.1.1.4 dyoung }
1853 1.1.1.4 dyoung }
1854 1.1.1.4 dyoung if (ni->ni_inact <= 0) {
1855 1.1.1.6 skrll IEEE80211_NOTE(ic,
1856 1.1.1.6 skrll IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, ni,
1857 1.1.1.6 skrll "station timed out due to inactivity "
1858 1.1.1.6 skrll "(refcnt %u)", ieee80211_node_refcnt(ni));
1859 1.1.1.4 dyoung /*
1860 1.1.1.4 dyoung * Send a deauthenticate frame and drop the station.
1861 1.1.1.4 dyoung * This is somewhat complicated due to reference counts
1862 1.1.1.4 dyoung * and locking. At this point a station will typically
1863 1.1.1.4 dyoung * have a reference count of 1. ieee80211_node_leave
1864 1.1.1.4 dyoung * will do a "free" of the node which will drop the
1865 1.1.1.4 dyoung * reference count. But in the meantime a reference
1866 1.1.1.4 dyoung * wil be held by the deauth frame. The actual reclaim
1867 1.1.1.4 dyoung * of the node will happen either after the tx is
1868 1.1.1.4 dyoung * completed or by ieee80211_node_leave.
1869 1.1.1.2 dyoung *
1870 1.1.1.4 dyoung * Separately we must drop the node lock before sending
1871 1.1.1.4 dyoung * in case the driver takes a lock, as this will result
1872 1.1.1.4 dyoung * in LOR between the node lock and the driver lock.
1873 1.1 dyoung */
1874 1.1.1.4 dyoung IEEE80211_NODE_UNLOCK(nt);
1875 1.1.1.4 dyoung if (ni->ni_associd != 0) {
1876 1.1.1.4 dyoung IEEE80211_SEND_MGMT(ic, ni,
1877 1.1.1.4 dyoung IEEE80211_FC0_SUBTYPE_DEAUTH,
1878 1.1.1.4 dyoung IEEE80211_REASON_AUTH_EXPIRE);
1879 1.1.1.4 dyoung }
1880 1.1.1.4 dyoung ieee80211_node_leave(ic, ni);
1881 1.1.1.2 dyoung ic->ic_stats.is_node_timeout++;
1882 1.1.1.2 dyoung goto restart;
1883 1.1.1.2 dyoung }
1884 1.1 dyoung }
1885 1.1.1.4 dyoung IEEE80211_NODE_UNLOCK(nt);
1886 1.1.1.4 dyoung
1887 1.1.1.4 dyoung IEEE80211_SCAN_UNLOCK(nt);
1888 1.1.1.4 dyoung
1889 1.1.1.4 dyoung nt->nt_inact_timer = IEEE80211_INACT_WAIT;
1890 1.1.1.4 dyoung }
1891 1.1.1.4 dyoung
1892 1.1.1.4 dyoung void
1893 1.1.1.4 dyoung ieee80211_iterate_nodes(struct ieee80211_node_table *nt, ieee80211_iter_func *f, void *arg)
1894 1.1.1.4 dyoung {
1895 1.1.1.4 dyoung struct ieee80211_node *ni;
1896 1.1.1.4 dyoung u_int gen;
1897 1.1.1.4 dyoung
1898 1.1.1.4 dyoung IEEE80211_SCAN_LOCK(nt);
1899 1.1.1.4 dyoung gen = nt->nt_scangen++;
1900 1.1.1.4 dyoung restart:
1901 1.1.1.4 dyoung IEEE80211_NODE_LOCK(nt);
1902 1.1.1.4 dyoung TAILQ_FOREACH(ni, &nt->nt_node, ni_list) {
1903 1.1.1.4 dyoung if (ni->ni_scangen != gen) {
1904 1.1.1.4 dyoung ni->ni_scangen = gen;
1905 1.1.1.4 dyoung (void) ieee80211_ref_node(ni);
1906 1.1.1.4 dyoung IEEE80211_NODE_UNLOCK(nt);
1907 1.1.1.4 dyoung (*f)(arg, ni);
1908 1.1.1.4 dyoung ieee80211_free_node(ni);
1909 1.1.1.4 dyoung goto restart;
1910 1.1.1.4 dyoung }
1911 1.1.1.4 dyoung }
1912 1.1.1.4 dyoung IEEE80211_NODE_UNLOCK(nt);
1913 1.1.1.4 dyoung
1914 1.1.1.4 dyoung IEEE80211_SCAN_UNLOCK(nt);
1915 1.1.1.4 dyoung }
1916 1.1.1.4 dyoung
1917 1.1.1.4 dyoung void
1918 1.1.1.4 dyoung ieee80211_dump_node(struct ieee80211_node_table *nt, struct ieee80211_node *ni)
1919 1.1.1.4 dyoung {
1920 1.1.1.4 dyoung printf("0x%p: mac %s refcnt %d\n", ni,
1921 1.1.1.4 dyoung ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni));
1922 1.1.1.4 dyoung printf("\tscangen %u authmode %u flags 0x%x\n",
1923 1.1.1.4 dyoung ni->ni_scangen, ni->ni_authmode, ni->ni_flags);
1924 1.1.1.4 dyoung printf("\tassocid 0x%x txpower %u vlan %u\n",
1925 1.1.1.4 dyoung ni->ni_associd, ni->ni_txpower, ni->ni_vlan);
1926 1.1.1.4 dyoung printf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n",
1927 1.1.1.4 dyoung ni->ni_txseqs[0],
1928 1.1.1.4 dyoung ni->ni_rxseqs[0] >> IEEE80211_SEQ_SEQ_SHIFT,
1929 1.1.1.4 dyoung ni->ni_rxseqs[0] & IEEE80211_SEQ_FRAG_MASK,
1930 1.1.1.4 dyoung ni->ni_rxfragstamp);
1931 1.1.1.4 dyoung printf("\trstamp %u rssi %u intval %u capinfo 0x%x\n",
1932 1.1.1.4 dyoung ni->ni_rstamp, ni->ni_rssi, ni->ni_intval, ni->ni_capinfo);
1933 1.1.1.4 dyoung printf("\tbssid %s essid \"%.*s\" channel %u:0x%x\n",
1934 1.1.1.4 dyoung ether_sprintf(ni->ni_bssid),
1935 1.1.1.4 dyoung ni->ni_esslen, ni->ni_essid,
1936 1.1.1.4 dyoung ni->ni_chan->ic_freq, ni->ni_chan->ic_flags);
1937 1.1.1.4 dyoung printf("\tfails %u inact %u txrate %u\n",
1938 1.1.1.4 dyoung ni->ni_fails, ni->ni_inact, ni->ni_txrate);
1939 1.1.1.4 dyoung }
1940 1.1.1.4 dyoung
1941 1.1.1.4 dyoung void
1942 1.1.1.4 dyoung ieee80211_dump_nodes(struct ieee80211_node_table *nt)
1943 1.1.1.4 dyoung {
1944 1.1.1.4 dyoung ieee80211_iterate_nodes(nt,
1945 1.1.1.4 dyoung (ieee80211_iter_func *) ieee80211_dump_node, nt);
1946 1.1.1.4 dyoung }
1947 1.1.1.4 dyoung
1948 1.1.1.4 dyoung /*
1949 1.1.1.4 dyoung * Handle a station joining an 11g network.
1950 1.1.1.4 dyoung */
1951 1.1.1.4 dyoung static void
1952 1.1.1.4 dyoung ieee80211_node_join_11g(struct ieee80211com *ic, struct ieee80211_node *ni)
1953 1.1.1.4 dyoung {
1954 1.1.1.4 dyoung
1955 1.1.1.4 dyoung /*
1956 1.1.1.4 dyoung * Station isn't capable of short slot time. Bump
1957 1.1.1.4 dyoung * the count of long slot time stations and disable
1958 1.1.1.4 dyoung * use of short slot time. Note that the actual switch
1959 1.1.1.4 dyoung * over to long slot time use may not occur until the
1960 1.1.1.4 dyoung * next beacon transmission (per sec. 7.3.1.4 of 11g).
1961 1.1.1.4 dyoung */
1962 1.1.1.4 dyoung if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) {
1963 1.1.1.4 dyoung ic->ic_longslotsta++;
1964 1.1.1.4 dyoung IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC,
1965 1.1.1.4 dyoung "[%s] station needs long slot time, count %d\n",
1966 1.1.1.4 dyoung ether_sprintf(ni->ni_macaddr), ic->ic_longslotsta);
1967 1.1.1.4 dyoung /* XXX vap's w/ conflicting needs won't work */
1968 1.1.1.4 dyoung ieee80211_set_shortslottime(ic, 0);
1969 1.1.1.4 dyoung }
1970 1.1.1.4 dyoung /*
1971 1.1.1.4 dyoung * If the new station is not an ERP station
1972 1.1.1.4 dyoung * then bump the counter and enable protection
1973 1.1.1.4 dyoung * if configured.
1974 1.1.1.4 dyoung */
1975 1.1.1.4 dyoung if (!ieee80211_iserp_rateset(ic, &ni->ni_rates)) {
1976 1.1.1.4 dyoung ic->ic_nonerpsta++;
1977 1.1.1.4 dyoung IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC,
1978 1.1.1.4 dyoung "[%s] station is !ERP, %d non-ERP stations associated\n",
1979 1.1.1.4 dyoung ether_sprintf(ni->ni_macaddr), ic->ic_nonerpsta);
1980 1.1.1.4 dyoung /*
1981 1.1.1.4 dyoung * If protection is configured, enable it.
1982 1.1.1.4 dyoung */
1983 1.1.1.4 dyoung if (ic->ic_protmode != IEEE80211_PROT_NONE) {
1984 1.1.1.4 dyoung IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC,
1985 1.1.1.4 dyoung "%s: enable use of protection\n", __func__);
1986 1.1.1.4 dyoung ic->ic_flags |= IEEE80211_F_USEPROT;
1987 1.1.1.4 dyoung }
1988 1.1.1.4 dyoung /*
1989 1.1.1.4 dyoung * If station does not support short preamble
1990 1.1.1.4 dyoung * then we must enable use of Barker preamble.
1991 1.1.1.4 dyoung */
1992 1.1.1.4 dyoung if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) {
1993 1.1.1.4 dyoung IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC,
1994 1.1.1.4 dyoung "[%s] station needs long preamble\n",
1995 1.1.1.4 dyoung ether_sprintf(ni->ni_macaddr));
1996 1.1.1.4 dyoung ic->ic_flags |= IEEE80211_F_USEBARKER;
1997 1.1.1.4 dyoung ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE;
1998 1.1.1.4 dyoung }
1999 1.1.1.4 dyoung } else
2000 1.1.1.4 dyoung ni->ni_flags |= IEEE80211_NODE_ERP;
2001 1.1.1.4 dyoung }
2002 1.1.1.4 dyoung
2003 1.1.1.4 dyoung void
2004 1.1.1.4 dyoung ieee80211_node_join(struct ieee80211com *ic, struct ieee80211_node *ni, int resp)
2005 1.1.1.4 dyoung {
2006 1.1.1.4 dyoung int newassoc;
2007 1.1.1.4 dyoung
2008 1.1.1.4 dyoung if (ni->ni_associd == 0) {
2009 1.1.1.4 dyoung u_int16_t aid;
2010 1.1.1.4 dyoung
2011 1.1.1.4 dyoung /*
2012 1.1.1.4 dyoung * It would be good to search the bitmap
2013 1.1.1.4 dyoung * more efficiently, but this will do for now.
2014 1.1.1.4 dyoung */
2015 1.1.1.4 dyoung for (aid = 1; aid < ic->ic_max_aid; aid++) {
2016 1.1.1.4 dyoung if (!IEEE80211_AID_ISSET(aid,
2017 1.1.1.4 dyoung ic->ic_aid_bitmap))
2018 1.1.1.4 dyoung break;
2019 1.1.1.4 dyoung }
2020 1.1.1.4 dyoung if (aid >= ic->ic_max_aid) {
2021 1.1.1.4 dyoung IEEE80211_SEND_MGMT(ic, ni, resp,
2022 1.1.1.4 dyoung IEEE80211_REASON_ASSOC_TOOMANY);
2023 1.1.1.4 dyoung ieee80211_node_leave(ic, ni);
2024 1.1.1.4 dyoung return;
2025 1.1.1.4 dyoung }
2026 1.1.1.4 dyoung ni->ni_associd = aid | 0xc000;
2027 1.1.1.4 dyoung IEEE80211_AID_SET(ni->ni_associd, ic->ic_aid_bitmap);
2028 1.1.1.4 dyoung ic->ic_sta_assoc++;
2029 1.1.1.4 dyoung newassoc = 1;
2030 1.1.1.6 skrll if (ic->ic_curmode == IEEE80211_MODE_11G)
2031 1.1.1.4 dyoung ieee80211_node_join_11g(ic, ni);
2032 1.1.1.4 dyoung } else
2033 1.1.1.4 dyoung newassoc = 0;
2034 1.1.1.4 dyoung
2035 1.1.1.4 dyoung IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG,
2036 1.1.1.4 dyoung "[%s] station %sassociated at aid %d: %s preamble, %s slot time%s%s\n",
2037 1.1.1.4 dyoung ether_sprintf(ni->ni_macaddr), newassoc ? "" : "re",
2038 1.1.1.4 dyoung IEEE80211_NODE_AID(ni),
2039 1.1.1.4 dyoung ic->ic_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long",
2040 1.1.1.4 dyoung ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long",
2041 1.1.1.4 dyoung ic->ic_flags & IEEE80211_F_USEPROT ? ", protection" : "",
2042 1.1.1.4 dyoung ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : ""
2043 1.1.1.4 dyoung );
2044 1.1.1.4 dyoung
2045 1.1.1.4 dyoung /* give driver a chance to setup state like ni_txrate */
2046 1.1.1.4 dyoung if (ic->ic_newassoc != NULL)
2047 1.1.1.6 skrll ic->ic_newassoc(ni, newassoc);
2048 1.1.1.4 dyoung ni->ni_inact_reload = ic->ic_inact_auth;
2049 1.1.1.4 dyoung ni->ni_inact = ni->ni_inact_reload;
2050 1.1.1.4 dyoung IEEE80211_SEND_MGMT(ic, ni, resp, IEEE80211_STATUS_SUCCESS);
2051 1.1.1.4 dyoung /* tell the authenticator about new station */
2052 1.1.1.4 dyoung if (ic->ic_auth->ia_node_join != NULL)
2053 1.1.1.4 dyoung ic->ic_auth->ia_node_join(ic, ni);
2054 1.1.1.4 dyoung ieee80211_notify_node_join(ic, ni, newassoc);
2055 1.1.1.4 dyoung }
2056 1.1.1.4 dyoung
2057 1.1.1.4 dyoung /*
2058 1.1.1.4 dyoung * Handle a station leaving an 11g network.
2059 1.1.1.4 dyoung */
2060 1.1.1.4 dyoung static void
2061 1.1.1.4 dyoung ieee80211_node_leave_11g(struct ieee80211com *ic, struct ieee80211_node *ni)
2062 1.1.1.4 dyoung {
2063 1.1.1.4 dyoung
2064 1.1.1.6 skrll KASSERT(ic->ic_curmode == IEEE80211_MODE_11G,
2065 1.1.1.6 skrll ("not in 11g, bss %u:0x%x, curmode %u", ni->ni_chan->ic_freq,
2066 1.1.1.6 skrll ni->ni_chan->ic_flags, ic->ic_curmode));
2067 1.1.1.4 dyoung
2068 1.1.1.4 dyoung /*
2069 1.1.1.4 dyoung * If a long slot station do the slot time bookkeeping.
2070 1.1.1.4 dyoung */
2071 1.1.1.4 dyoung if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) {
2072 1.1.1.4 dyoung KASSERT(ic->ic_longslotsta > 0,
2073 1.1.1.4 dyoung ("bogus long slot station count %d", ic->ic_longslotsta));
2074 1.1.1.4 dyoung ic->ic_longslotsta--;
2075 1.1.1.4 dyoung IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC,
2076 1.1.1.4 dyoung "[%s] long slot time station leaves, count now %d\n",
2077 1.1.1.4 dyoung ether_sprintf(ni->ni_macaddr), ic->ic_longslotsta);
2078 1.1.1.4 dyoung if (ic->ic_longslotsta == 0) {
2079 1.1.1.4 dyoung /*
2080 1.1.1.4 dyoung * Re-enable use of short slot time if supported
2081 1.1.1.4 dyoung * and not operating in IBSS mode (per spec).
2082 1.1.1.4 dyoung */
2083 1.1.1.4 dyoung if ((ic->ic_caps & IEEE80211_C_SHSLOT) &&
2084 1.1.1.4 dyoung ic->ic_opmode != IEEE80211_M_IBSS) {
2085 1.1.1.4 dyoung IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC,
2086 1.1.1.4 dyoung "%s: re-enable use of short slot time\n",
2087 1.1.1.4 dyoung __func__);
2088 1.1.1.4 dyoung ieee80211_set_shortslottime(ic, 1);
2089 1.1.1.4 dyoung }
2090 1.1.1.4 dyoung }
2091 1.1.1.4 dyoung }
2092 1.1.1.4 dyoung /*
2093 1.1.1.4 dyoung * If a non-ERP station do the protection-related bookkeeping.
2094 1.1.1.4 dyoung */
2095 1.1.1.4 dyoung if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) {
2096 1.1.1.4 dyoung KASSERT(ic->ic_nonerpsta > 0,
2097 1.1.1.4 dyoung ("bogus non-ERP station count %d", ic->ic_nonerpsta));
2098 1.1.1.4 dyoung ic->ic_nonerpsta--;
2099 1.1.1.4 dyoung IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC,
2100 1.1.1.4 dyoung "[%s] non-ERP station leaves, count now %d\n",
2101 1.1.1.4 dyoung ether_sprintf(ni->ni_macaddr), ic->ic_nonerpsta);
2102 1.1.1.4 dyoung if (ic->ic_nonerpsta == 0) {
2103 1.1.1.4 dyoung IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC,
2104 1.1.1.4 dyoung "%s: disable use of protection\n", __func__);
2105 1.1.1.4 dyoung ic->ic_flags &= ~IEEE80211_F_USEPROT;
2106 1.1.1.4 dyoung /* XXX verify mode? */
2107 1.1.1.4 dyoung if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) {
2108 1.1.1.4 dyoung IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC,
2109 1.1.1.4 dyoung "%s: re-enable use of short preamble\n",
2110 1.1.1.4 dyoung __func__);
2111 1.1.1.4 dyoung ic->ic_flags |= IEEE80211_F_SHPREAMBLE;
2112 1.1.1.4 dyoung ic->ic_flags &= ~IEEE80211_F_USEBARKER;
2113 1.1.1.4 dyoung }
2114 1.1.1.4 dyoung }
2115 1.1.1.4 dyoung }
2116 1.1 dyoung }
2117 1.1 dyoung
2118 1.1.1.4 dyoung /*
2119 1.1.1.4 dyoung * Handle bookkeeping for station deauthentication/disassociation
2120 1.1.1.4 dyoung * when operating as an ap.
2121 1.1.1.4 dyoung */
2122 1.1 dyoung void
2123 1.1.1.4 dyoung ieee80211_node_leave(struct ieee80211com *ic, struct ieee80211_node *ni)
2124 1.1 dyoung {
2125 1.1.1.4 dyoung struct ieee80211_node_table *nt = ni->ni_table;
2126 1.1.1.4 dyoung
2127 1.1.1.4 dyoung IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG,
2128 1.1.1.4 dyoung "[%s] station with aid %d leaves\n",
2129 1.1.1.4 dyoung ether_sprintf(ni->ni_macaddr), IEEE80211_NODE_AID(ni));
2130 1.1.1.4 dyoung
2131 1.1.1.4 dyoung KASSERT(ic->ic_opmode == IEEE80211_M_HOSTAP ||
2132 1.1.1.4 dyoung ic->ic_opmode == IEEE80211_M_IBSS ||
2133 1.1.1.4 dyoung ic->ic_opmode == IEEE80211_M_AHDEMO,
2134 1.1.1.4 dyoung ("unexpected operating mode %u", ic->ic_opmode));
2135 1.1.1.4 dyoung /*
2136 1.1.1.4 dyoung * If node wasn't previously associated all
2137 1.1.1.4 dyoung * we need to do is reclaim the reference.
2138 1.1.1.4 dyoung */
2139 1.1.1.4 dyoung /* XXX ibss mode bypasses 11g and notification */
2140 1.1.1.4 dyoung if (ni->ni_associd == 0)
2141 1.1.1.4 dyoung goto done;
2142 1.1.1.4 dyoung /*
2143 1.1.1.4 dyoung * Tell the authenticator the station is leaving.
2144 1.1.1.4 dyoung * Note that we must do this before yanking the
2145 1.1.1.4 dyoung * association id as the authenticator uses the
2146 1.1.1.4 dyoung * associd to locate it's state block.
2147 1.1.1.4 dyoung */
2148 1.1.1.4 dyoung if (ic->ic_auth->ia_node_leave != NULL)
2149 1.1.1.4 dyoung ic->ic_auth->ia_node_leave(ic, ni);
2150 1.1.1.4 dyoung IEEE80211_AID_CLR(ni->ni_associd, ic->ic_aid_bitmap);
2151 1.1.1.4 dyoung ni->ni_associd = 0;
2152 1.1.1.4 dyoung ic->ic_sta_assoc--;
2153 1.1.1.4 dyoung
2154 1.1.1.6 skrll if (ic->ic_curmode == IEEE80211_MODE_11G)
2155 1.1.1.4 dyoung ieee80211_node_leave_11g(ic, ni);
2156 1.1.1.4 dyoung /*
2157 1.1.1.4 dyoung * Cleanup station state. In particular clear various
2158 1.1.1.4 dyoung * state that might otherwise be reused if the node
2159 1.1.1.4 dyoung * is reused before the reference count goes to zero
2160 1.1.1.4 dyoung * (and memory is reclaimed).
2161 1.1.1.4 dyoung */
2162 1.1.1.4 dyoung ieee80211_sta_leave(ic, ni);
2163 1.1.1.4 dyoung done:
2164 1.1.1.4 dyoung /*
2165 1.1.1.4 dyoung * Remove the node from any table it's recorded in and
2166 1.1.1.4 dyoung * drop the caller's reference. Removal from the table
2167 1.1.1.4 dyoung * is important to insure the node is not reprocessed
2168 1.1.1.4 dyoung * for inactivity.
2169 1.1.1.4 dyoung */
2170 1.1.1.4 dyoung if (nt != NULL) {
2171 1.1.1.4 dyoung IEEE80211_NODE_LOCK(nt);
2172 1.1.1.4 dyoung node_reclaim(nt, ni);
2173 1.1.1.4 dyoung IEEE80211_NODE_UNLOCK(nt);
2174 1.1.1.4 dyoung } else
2175 1.1.1.4 dyoung ieee80211_free_node(ni);
2176 1.1.1.4 dyoung }
2177 1.1.1.4 dyoung
2178 1.1.1.4 dyoung u_int8_t
2179 1.1.1.4 dyoung ieee80211_getrssi(struct ieee80211com *ic)
2180 1.1.1.4 dyoung {
2181 1.1.1.4 dyoung #define NZ(x) ((x) == 0 ? 1 : (x))
2182 1.1.1.4 dyoung struct ieee80211_node_table *nt = &ic->ic_sta;
2183 1.1.1.4 dyoung u_int32_t rssi_samples, rssi_total;
2184 1.1 dyoung struct ieee80211_node *ni;
2185 1.1 dyoung
2186 1.1.1.4 dyoung rssi_total = 0;
2187 1.1.1.4 dyoung rssi_samples = 0;
2188 1.1.1.4 dyoung switch (ic->ic_opmode) {
2189 1.1.1.4 dyoung case IEEE80211_M_IBSS: /* average of all ibss neighbors */
2190 1.1.1.4 dyoung /* XXX locking */
2191 1.1.1.4 dyoung TAILQ_FOREACH(ni, &nt->nt_node, ni_list)
2192 1.1.1.4 dyoung if (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) {
2193 1.1.1.4 dyoung rssi_samples++;
2194 1.1.1.4 dyoung rssi_total += ic->ic_node_getrssi(ni);
2195 1.1.1.4 dyoung }
2196 1.1.1.4 dyoung break;
2197 1.1.1.4 dyoung case IEEE80211_M_AHDEMO: /* average of all neighbors */
2198 1.1.1.4 dyoung /* XXX locking */
2199 1.1.1.4 dyoung TAILQ_FOREACH(ni, &nt->nt_node, ni_list) {
2200 1.1.1.4 dyoung rssi_samples++;
2201 1.1.1.4 dyoung rssi_total += ic->ic_node_getrssi(ni);
2202 1.1.1.4 dyoung }
2203 1.1.1.4 dyoung break;
2204 1.1.1.4 dyoung case IEEE80211_M_HOSTAP: /* average of all associated stations */
2205 1.1.1.4 dyoung /* XXX locking */
2206 1.1.1.4 dyoung TAILQ_FOREACH(ni, &nt->nt_node, ni_list)
2207 1.1.1.4 dyoung if (IEEE80211_AID(ni->ni_associd) != 0) {
2208 1.1.1.4 dyoung rssi_samples++;
2209 1.1.1.4 dyoung rssi_total += ic->ic_node_getrssi(ni);
2210 1.1.1.4 dyoung }
2211 1.1.1.4 dyoung break;
2212 1.1.1.4 dyoung case IEEE80211_M_MONITOR: /* XXX */
2213 1.1.1.4 dyoung case IEEE80211_M_STA: /* use stats from associated ap */
2214 1.1.1.4 dyoung default:
2215 1.1.1.4 dyoung if (ic->ic_bss != NULL)
2216 1.1.1.4 dyoung rssi_total = ic->ic_node_getrssi(ic->ic_bss);
2217 1.1.1.4 dyoung rssi_samples = 1;
2218 1.1.1.4 dyoung break;
2219 1.1.1.4 dyoung }
2220 1.1.1.4 dyoung return rssi_total / NZ(rssi_samples);
2221 1.1.1.4 dyoung #undef NZ
2222 1.1.1.4 dyoung }
2223 1.1.1.4 dyoung
2224 1.1.1.4 dyoung /*
2225 1.1.1.4 dyoung * Indicate whether there are frames queued for a station in power-save mode.
2226 1.1.1.4 dyoung */
2227 1.1.1.4 dyoung static void
2228 1.1.1.6 skrll ieee80211_set_tim(struct ieee80211_node *ni, int set)
2229 1.1.1.4 dyoung {
2230 1.1.1.6 skrll struct ieee80211com *ic = ni->ni_ic;
2231 1.1.1.4 dyoung u_int16_t aid;
2232 1.1.1.4 dyoung
2233 1.1.1.4 dyoung KASSERT(ic->ic_opmode == IEEE80211_M_HOSTAP ||
2234 1.1.1.4 dyoung ic->ic_opmode == IEEE80211_M_IBSS,
2235 1.1.1.4 dyoung ("operating mode %u", ic->ic_opmode));
2236 1.1.1.4 dyoung
2237 1.1.1.4 dyoung aid = IEEE80211_AID(ni->ni_associd);
2238 1.1.1.4 dyoung KASSERT(aid < ic->ic_max_aid,
2239 1.1.1.4 dyoung ("bogus aid %u, max %u", aid, ic->ic_max_aid));
2240 1.1.1.4 dyoung
2241 1.1.1.4 dyoung IEEE80211_BEACON_LOCK(ic);
2242 1.1.1.4 dyoung if (set != (isset(ic->ic_tim_bitmap, aid) != 0)) {
2243 1.1.1.4 dyoung if (set) {
2244 1.1.1.4 dyoung setbit(ic->ic_tim_bitmap, aid);
2245 1.1.1.4 dyoung ic->ic_ps_pending++;
2246 1.1.1.4 dyoung } else {
2247 1.1.1.4 dyoung clrbit(ic->ic_tim_bitmap, aid);
2248 1.1.1.4 dyoung ic->ic_ps_pending--;
2249 1.1.1.4 dyoung }
2250 1.1.1.4 dyoung ic->ic_flags |= IEEE80211_F_TIMUPDATE;
2251 1.1.1.4 dyoung }
2252 1.1.1.4 dyoung IEEE80211_BEACON_UNLOCK(ic);
2253 1.1.1.4 dyoung }
2254 1.1.1.4 dyoung
2255 1.1.1.4 dyoung /*
2256 1.1.1.4 dyoung * Node table support.
2257 1.1.1.4 dyoung */
2258 1.1.1.4 dyoung
2259 1.1.1.4 dyoung static void
2260 1.1.1.4 dyoung ieee80211_node_table_init(struct ieee80211com *ic,
2261 1.1.1.4 dyoung struct ieee80211_node_table *nt,
2262 1.1.1.6 skrll const char *name, int inact, int keyixmax,
2263 1.1.1.4 dyoung void (*timeout)(struct ieee80211_node_table *))
2264 1.1.1.4 dyoung {
2265 1.1.1.4 dyoung
2266 1.1.1.4 dyoung IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE,
2267 1.1.1.4 dyoung "%s %s table, inact %u\n", __func__, name, inact);
2268 1.1.1.4 dyoung
2269 1.1.1.4 dyoung nt->nt_ic = ic;
2270 1.1.1.4 dyoung /* XXX need unit */
2271 1.1.1.4 dyoung IEEE80211_NODE_LOCK_INIT(nt, ic->ic_ifp->if_xname);
2272 1.1.1.4 dyoung IEEE80211_SCAN_LOCK_INIT(nt, ic->ic_ifp->if_xname);
2273 1.1.1.4 dyoung TAILQ_INIT(&nt->nt_node);
2274 1.1.1.4 dyoung nt->nt_name = name;
2275 1.1.1.4 dyoung nt->nt_scangen = 1;
2276 1.1.1.4 dyoung nt->nt_inact_init = inact;
2277 1.1.1.4 dyoung nt->nt_timeout = timeout;
2278 1.1.1.6 skrll nt->nt_keyixmax = keyixmax;
2279 1.1.1.6 skrll if (nt->nt_keyixmax > 0) {
2280 1.1.1.6 skrll MALLOC(nt->nt_keyixmap, struct ieee80211_node **,
2281 1.1.1.6 skrll keyixmax * sizeof(struct ieee80211_node *),
2282 1.1.1.6 skrll M_80211_NODE, M_NOWAIT | M_ZERO);
2283 1.1.1.6 skrll if (nt->nt_keyixmap == NULL)
2284 1.1.1.6 skrll if_printf(ic->ic_ifp,
2285 1.1.1.6 skrll "Cannot allocate key index map with %u entries\n",
2286 1.1.1.6 skrll keyixmax);
2287 1.1.1.6 skrll } else
2288 1.1.1.6 skrll nt->nt_keyixmap = NULL;
2289 1.1.1.4 dyoung }
2290 1.1.1.4 dyoung
2291 1.1.1.4 dyoung void
2292 1.1.1.4 dyoung ieee80211_node_table_reset(struct ieee80211_node_table *nt)
2293 1.1.1.4 dyoung {
2294 1.1.1.4 dyoung
2295 1.1.1.4 dyoung IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE,
2296 1.1.1.4 dyoung "%s %s table\n", __func__, nt->nt_name);
2297 1.1.1.4 dyoung
2298 1.1.1.4 dyoung IEEE80211_NODE_LOCK(nt);
2299 1.1.1.4 dyoung nt->nt_inact_timer = 0;
2300 1.1.1.4 dyoung ieee80211_free_allnodes_locked(nt);
2301 1.1.1.4 dyoung IEEE80211_NODE_UNLOCK(nt);
2302 1.1.1.4 dyoung }
2303 1.1.1.4 dyoung
2304 1.1.1.4 dyoung static void
2305 1.1.1.4 dyoung ieee80211_node_table_cleanup(struct ieee80211_node_table *nt)
2306 1.1.1.4 dyoung {
2307 1.1.1.4 dyoung
2308 1.1.1.4 dyoung IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE,
2309 1.1.1.4 dyoung "%s %s table\n", __func__, nt->nt_name);
2310 1.1.1.4 dyoung
2311 1.1.1.6 skrll IEEE80211_NODE_LOCK(nt);
2312 1.1.1.4 dyoung ieee80211_free_allnodes_locked(nt);
2313 1.1.1.6 skrll if (nt->nt_keyixmap != NULL) {
2314 1.1.1.6 skrll /* XXX verify all entries are NULL */
2315 1.1.1.6 skrll int i;
2316 1.1.1.6 skrll for (i = 0; i < nt->nt_keyixmax; i++)
2317 1.1.1.6 skrll if (nt->nt_keyixmap[i] != NULL)
2318 1.1.1.6 skrll printf("%s: %s[%u] still active\n", __func__,
2319 1.1.1.6 skrll nt->nt_name, i);
2320 1.1.1.6 skrll FREE(nt->nt_keyixmap, M_80211_NODE);
2321 1.1.1.6 skrll nt->nt_keyixmap = NULL;
2322 1.1.1.6 skrll }
2323 1.1.1.4 dyoung IEEE80211_SCAN_LOCK_DESTROY(nt);
2324 1.1.1.4 dyoung IEEE80211_NODE_LOCK_DESTROY(nt);
2325 1.1 dyoung }
2326