1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2001 Atsushi Onoe
5 * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD: releng/12.0/sys/net80211/ieee80211_node.c 337572 2018-08-10 13:34:23Z kevans $");
31
32 #include "opt_wlan.h"
33
34 #include <sys/param.h>
35 #include <sys/systm.h>
36 #include <sys/mbuf.h>
37 #include <sys/malloc.h>
38 #include <sys/kernel.h>
39
40 #include <sys/socket.h>
41
42 #include <net/if.h>
43 #include <net/if_var.h>
44 #include <net/if_media.h>
45 #include <net/ethernet.h>
46
47 #include <net80211/ieee80211_var.h>
48 #include <net80211/ieee80211_input.h>
49 #ifdef IEEE80211_SUPPORT_SUPERG
50 #include <net80211/ieee80211_superg.h>
51 #endif
52 #ifdef IEEE80211_SUPPORT_TDMA
53 #include <net80211/ieee80211_tdma.h>
54 #endif
55 #include <net80211/ieee80211_wds.h>
56 #include <net80211/ieee80211_mesh.h>
57 #include <net80211/ieee80211_ratectl.h>
58 #include <net80211/ieee80211_vht.h>
59
60 #include <net/bpf.h>
61
62 /*
63 * IEEE80211_NODE_HASHSIZE must be a power of 2.
64 */
65 CTASSERT((IEEE80211_NODE_HASHSIZE & (IEEE80211_NODE_HASHSIZE-1)) == 0);
66
67 /*
68 * Association id's are managed with a bit vector.
69 */
70 #define IEEE80211_AID_SET(_vap, b) \
71 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] |= \
72 (1 << (IEEE80211_AID(b) % 32)))
73 #define IEEE80211_AID_CLR(_vap, b) \
74 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] &= \
75 ~(1 << (IEEE80211_AID(b) % 32)))
76 #define IEEE80211_AID_ISSET(_vap, b) \
77 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] & (1 << (IEEE80211_AID(b) % 32)))
78
79 static int ieee80211_sta_join1(struct ieee80211_node *);
80
81 static struct ieee80211_node *node_alloc(struct ieee80211vap *,
82 const uint8_t [IEEE80211_ADDR_LEN]);
83 static void node_cleanup(struct ieee80211_node *);
84 static void node_free(struct ieee80211_node *);
85 static void node_age(struct ieee80211_node *);
86 static int8_t node_getrssi(const struct ieee80211_node *);
87 static void node_getsignal(const struct ieee80211_node *, int8_t *, int8_t *);
88 static void node_getmimoinfo(const struct ieee80211_node *,
89 struct ieee80211_mimo_info *);
90
91 static void _ieee80211_free_node(struct ieee80211_node *);
92
93 static void node_reclaim(struct ieee80211_node_table *nt,
94 struct ieee80211_node *ni);
95 static void ieee80211_node_table_init(struct ieee80211com *ic,
96 struct ieee80211_node_table *nt, const char *name,
97 int inact, int keymaxix);
98 static void ieee80211_node_table_reset(struct ieee80211_node_table *,
99 struct ieee80211vap *);
100 static void ieee80211_node_table_cleanup(struct ieee80211_node_table *nt);
101 static void ieee80211_erp_timeout(struct ieee80211com *);
102
103 MALLOC_DEFINE(M_80211_NODE, "80211node", "802.11 node state");
104 MALLOC_DEFINE(M_80211_NODE_IE, "80211nodeie", "802.11 node ie");
105
106 void
107 ieee80211_node_attach(struct ieee80211com *ic)
108 {
109 /* XXX really want maxlen enforced per-sta */
110 ieee80211_ageq_init(&ic->ic_stageq, ic->ic_max_keyix * 8,
111 "802.11 staging q");
112 ieee80211_node_table_init(ic, &ic->ic_sta, "station",
113 IEEE80211_INACT_INIT, ic->ic_max_keyix);
114 callout_init(&ic->ic_inact, 1);
115 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz,
116 ieee80211_node_timeout, ic);
117
118 ic->ic_node_alloc = node_alloc;
119 ic->ic_node_free = node_free;
120 ic->ic_node_cleanup = node_cleanup;
121 ic->ic_node_age = node_age;
122 ic->ic_node_drain = node_age; /* NB: same as age */
123 ic->ic_node_getrssi = node_getrssi;
124 ic->ic_node_getsignal = node_getsignal;
125 ic->ic_node_getmimoinfo = node_getmimoinfo;
126
127 /*
128 * Set flags to be propagated to all vap's;
129 * these define default behaviour/configuration.
130 */
131 ic->ic_flags_ext |= IEEE80211_FEXT_INACT; /* inactivity processing */
132 }
133
134 void
135 ieee80211_node_detach(struct ieee80211com *ic)
136 {
137
138 callout_drain(&ic->ic_inact);
139 ieee80211_node_table_cleanup(&ic->ic_sta);
140 ieee80211_ageq_drain(&ic->ic_stageq);
141 ieee80211_ageq_cleanup(&ic->ic_stageq);
142 }
143
144 void
145 ieee80211_node_vattach(struct ieee80211vap *vap)
146 {
147 /* NB: driver can override */
148 vap->iv_max_aid = IEEE80211_AID_DEF;
149
150 /* default station inactivity timer setings */
151 vap->iv_inact_init = IEEE80211_INACT_INIT;
152 vap->iv_inact_auth = IEEE80211_INACT_AUTH;
153 vap->iv_inact_run = IEEE80211_INACT_RUN;
154 vap->iv_inact_probe = IEEE80211_INACT_PROBE;
155
156 IEEE80211_DPRINTF(vap, IEEE80211_MSG_INACT,
157 "%s: init %u auth %u run %u probe %u\n", __func__,
158 vap->iv_inact_init, vap->iv_inact_auth,
159 vap->iv_inact_run, vap->iv_inact_probe);
160 }
161
162 void
163 ieee80211_node_latevattach(struct ieee80211vap *vap)
164 {
165 if (vap->iv_opmode == IEEE80211_M_HOSTAP) {
166 /* XXX should we allow max aid to be zero? */
167 if (vap->iv_max_aid < IEEE80211_AID_MIN) {
168 vap->iv_max_aid = IEEE80211_AID_MIN;
169 if_printf(vap->iv_ifp,
170 "WARNING: max aid too small, changed to %d\n",
171 vap->iv_max_aid);
172 }
173 vap->iv_aid_bitmap = (uint32_t *) IEEE80211_MALLOC(
174 howmany(vap->iv_max_aid, 32) * sizeof(uint32_t),
175 M_80211_NODE,
176 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
177 if (vap->iv_aid_bitmap == NULL) {
178 /* XXX no way to recover */
179 printf("%s: no memory for AID bitmap, max aid %d!\n",
180 __func__, vap->iv_max_aid);
181 vap->iv_max_aid = 0;
182 }
183 }
184
185 ieee80211_reset_bss(vap);
186
187 vap->iv_auth = ieee80211_authenticator_get(vap->iv_bss->ni_authmode);
188 }
189
190 void
191 ieee80211_node_vdetach(struct ieee80211vap *vap)
192 {
193 struct ieee80211com *ic = vap->iv_ic;
194
195 ieee80211_node_table_reset(&ic->ic_sta, vap);
196 if (vap->iv_bss != NULL) {
197 ieee80211_free_node(vap->iv_bss);
198 vap->iv_bss = NULL;
199 }
200 if (vap->iv_aid_bitmap != NULL) {
201 IEEE80211_FREE(vap->iv_aid_bitmap, M_80211_NODE);
202 vap->iv_aid_bitmap = NULL;
203 }
204 }
205
206 /*
207 * Port authorize/unauthorize interfaces for use by an authenticator.
208 */
209
210 void
211 ieee80211_node_authorize(struct ieee80211_node *ni)
212 {
213 struct ieee80211vap *vap = ni->ni_vap;
214
215 ni->ni_flags |= IEEE80211_NODE_AUTH;
216 ni->ni_inact_reload = vap->iv_inact_run;
217 ni->ni_inact = ni->ni_inact_reload;
218
219 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni,
220 "%s: inact_reload %u", __func__, ni->ni_inact_reload);
221 }
222
223 void
224 ieee80211_node_unauthorize(struct ieee80211_node *ni)
225 {
226 struct ieee80211vap *vap = ni->ni_vap;
227
228 ni->ni_flags &= ~IEEE80211_NODE_AUTH;
229 ni->ni_inact_reload = vap->iv_inact_auth;
230 if (ni->ni_inact > ni->ni_inact_reload)
231 ni->ni_inact = ni->ni_inact_reload;
232
233 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni,
234 "%s: inact_reload %u inact %u", __func__,
235 ni->ni_inact_reload, ni->ni_inact);
236 }
237
238 /*
239 * Fix tx parameters for a node according to ``association state''.
240 */
241 void
242 ieee80211_node_setuptxparms(struct ieee80211_node *ni)
243 {
244 struct ieee80211vap *vap = ni->ni_vap;
245 enum ieee80211_phymode mode;
246
247 if (ni->ni_flags & IEEE80211_NODE_VHT) {
248 if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan))
249 mode = IEEE80211_MODE_VHT_5GHZ;
250 else
251 mode = IEEE80211_MODE_VHT_2GHZ;
252 } else if (ni->ni_flags & IEEE80211_NODE_HT) {
253 if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan))
254 mode = IEEE80211_MODE_11NA;
255 else
256 mode = IEEE80211_MODE_11NG;
257 } else { /* legacy rate handling */
258 if (IEEE80211_IS_CHAN_ST(ni->ni_chan))
259 mode = IEEE80211_MODE_STURBO_A;
260 else if (IEEE80211_IS_CHAN_HALF(ni->ni_chan))
261 mode = IEEE80211_MODE_HALF;
262 else if (IEEE80211_IS_CHAN_QUARTER(ni->ni_chan))
263 mode = IEEE80211_MODE_QUARTER;
264 /* NB: 108A should be handled as 11a */
265 else if (IEEE80211_IS_CHAN_A(ni->ni_chan))
266 mode = IEEE80211_MODE_11A;
267 else if (IEEE80211_IS_CHAN_108G(ni->ni_chan) ||
268 (ni->ni_flags & IEEE80211_NODE_ERP))
269 mode = IEEE80211_MODE_11G;
270 else
271 mode = IEEE80211_MODE_11B;
272 }
273 ni->ni_txparms = &vap->iv_txparms[mode];
274 }
275
276 /*
277 * Set/change the channel. The rate set is also updated as
278 * to insure a consistent view by drivers.
279 * XXX should be private but hostap needs it to deal with CSA
280 */
281 void
282 ieee80211_node_set_chan(struct ieee80211_node *ni,
283 struct ieee80211_channel *chan)
284 {
285 struct ieee80211com *ic = ni->ni_ic;
286 struct ieee80211vap *vap = ni->ni_vap;
287 enum ieee80211_phymode mode;
288
289 KASSERT(chan != IEEE80211_CHAN_ANYC, ("no channel"));
290
291 ni->ni_chan = chan;
292 mode = ieee80211_chan2mode(chan);
293 if (IEEE80211_IS_CHAN_HT(chan)) {
294 /*
295 * We must install the legacy rate est in ni_rates and the
296 * HT rate set in ni_htrates.
297 */
298 ni->ni_htrates = *ieee80211_get_suphtrates(ic, chan);
299 /*
300 * Setup bss tx parameters based on operating mode. We
301 * use legacy rates when operating in a mixed HT+non-HT bss
302 * and non-ERP rates in 11g for mixed ERP+non-ERP bss.
303 */
304 if (mode == IEEE80211_MODE_11NA &&
305 (vap->iv_flags_ht & IEEE80211_FHT_PUREN) == 0)
306 mode = IEEE80211_MODE_11A;
307 else if (mode == IEEE80211_MODE_11NG &&
308 (vap->iv_flags_ht & IEEE80211_FHT_PUREN) == 0)
309 mode = IEEE80211_MODE_11G;
310 if (mode == IEEE80211_MODE_11G &&
311 (vap->iv_flags & IEEE80211_F_PUREG) == 0)
312 mode = IEEE80211_MODE_11B;
313 }
314 ni->ni_txparms = &vap->iv_txparms[mode];
315 ni->ni_rates = *ieee80211_get_suprates(ic, chan);
316 }
317
318 static __inline void
319 copy_bss(struct ieee80211_node *nbss, const struct ieee80211_node *obss)
320 {
321 /* propagate useful state */
322 nbss->ni_authmode = obss->ni_authmode;
323 nbss->ni_txpower = obss->ni_txpower;
324 nbss->ni_vlan = obss->ni_vlan;
325 /* XXX statistics? */
326 /* XXX legacy WDS bssid? */
327 }
328
329 void
330 ieee80211_create_ibss(struct ieee80211vap* vap, struct ieee80211_channel *chan)
331 {
332 struct ieee80211com *ic = vap->iv_ic;
333 struct ieee80211_node *ni;
334
335 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN,
336 "%s: creating %s on channel %u%c flags 0x%08x\n", __func__,
337 ieee80211_opmode_name[vap->iv_opmode],
338 ieee80211_chan2ieee(ic, chan),
339 ieee80211_channel_type_char(chan),
340 chan->ic_flags);
341
342 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr);
343 if (ni == NULL) {
344 /* XXX recovery? */
345 return;
346 }
347 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr);
348 ni->ni_esslen = vap->iv_des_ssid[0].len;
349 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen);
350 if (vap->iv_bss != NULL)
351 copy_bss(ni, vap->iv_bss);
352 ni->ni_intval = ic->ic_bintval;
353 if (vap->iv_flags & IEEE80211_F_PRIVACY)
354 ni->ni_capinfo |= IEEE80211_CAPINFO_PRIVACY;
355 if (ic->ic_phytype == IEEE80211_T_FH) {
356 ni->ni_fhdwell = 200; /* XXX */
357 ni->ni_fhindex = 1;
358 }
359 if (vap->iv_opmode == IEEE80211_M_IBSS) {
360 ni->ni_capinfo |= IEEE80211_CAPINFO_IBSS; /* XXX */
361 if (vap->iv_flags & IEEE80211_F_DESBSSID)
362 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid);
363 else {
364 get_random_bytes(ni->ni_bssid, IEEE80211_ADDR_LEN);
365 /* clear group bit, add local bit */
366 ni->ni_bssid[0] = (ni->ni_bssid[0] &~ 0x01) | 0x02;
367 }
368 } else if (vap->iv_opmode == IEEE80211_M_AHDEMO) {
369 if (vap->iv_flags & IEEE80211_F_DESBSSID)
370 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid);
371 else
372 #ifdef IEEE80211_SUPPORT_TDMA
373 if ((vap->iv_caps & IEEE80211_C_TDMA) == 0)
374 #endif
375 memset(ni->ni_bssid, 0, IEEE80211_ADDR_LEN);
376 #ifdef IEEE80211_SUPPORT_MESH
377 } else if (vap->iv_opmode == IEEE80211_M_MBSS) {
378 ni->ni_meshidlen = vap->iv_mesh->ms_idlen;
379 memcpy(ni->ni_meshid, vap->iv_mesh->ms_id, ni->ni_meshidlen);
380 #endif
381 }
382 /*
383 * Fix the channel and related attributes.
384 */
385 /* clear DFS CAC state on previous channel */
386 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC &&
387 ic->ic_bsschan->ic_freq != chan->ic_freq &&
388 IEEE80211_IS_CHAN_CACDONE(ic->ic_bsschan))
389 ieee80211_dfs_cac_clear(ic, ic->ic_bsschan);
390 ic->ic_bsschan = chan;
391 ieee80211_node_set_chan(ni, chan);
392 ic->ic_curmode = ieee80211_chan2mode(chan);
393 /*
394 * Do mode-specific setup.
395 */
396 if (IEEE80211_IS_CHAN_FULL(chan)) {
397 if (IEEE80211_IS_CHAN_ANYG(chan)) {
398 /*
399 * Use a mixed 11b/11g basic rate set.
400 */
401 ieee80211_setbasicrates(&ni->ni_rates,
402 IEEE80211_MODE_11G);
403 if (vap->iv_flags & IEEE80211_F_PUREG) {
404 /*
405 * Also mark OFDM rates basic so 11b
406 * stations do not join (WiFi compliance).
407 */
408 ieee80211_addbasicrates(&ni->ni_rates,
409 IEEE80211_MODE_11A);
410 }
411 } else if (IEEE80211_IS_CHAN_B(chan)) {
412 /*
413 * Force pure 11b rate set.
414 */
415 ieee80211_setbasicrates(&ni->ni_rates,
416 IEEE80211_MODE_11B);
417 }
418 }
419
420 /* XXX TODO: other bits and pieces - eg fast-frames? */
421
422 /* If we're an 11n channel then initialise the 11n bits */
423 if (IEEE80211_IS_CHAN_VHT(ni->ni_chan)) {
424 /* XXX what else? */
425 ieee80211_ht_node_init(ni);
426 ieee80211_vht_node_init(ni);
427 } else if (IEEE80211_IS_CHAN_HT(ni->ni_chan)) {
428 /* XXX what else? */
429 ieee80211_ht_node_init(ni);
430 }
431
432 (void) ieee80211_sta_join1(ieee80211_ref_node(ni));
433 }
434
435 /*
436 * Reset bss state on transition to the INIT state.
437 * Clear any stations from the table (they have been
438 * deauth'd) and reset the bss node (clears key, rate
439 * etc. state).
440 */
441 void
442 ieee80211_reset_bss(struct ieee80211vap *vap)
443 {
444 struct ieee80211com *ic = vap->iv_ic;
445 struct ieee80211_node *ni, *obss;
446
447 ieee80211_node_table_reset(&ic->ic_sta, vap);
448 /* XXX multi-bss: wrong */
449 ieee80211_reset_erp(ic);
450
451 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr);
452 KASSERT(ni != NULL, ("unable to setup initial BSS node"));
453 obss = vap->iv_bss;
454 vap->iv_bss = ieee80211_ref_node(ni);
455 if (obss != NULL) {
456 copy_bss(ni, obss);
457 ni->ni_intval = ic->ic_bintval;
458 ieee80211_free_node(obss);
459 } else
460 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr);
461 }
462
463 static int
464 match_ssid(const struct ieee80211_node *ni,
465 int nssid, const struct ieee80211_scan_ssid ssids[])
466 {
467 int i;
468
469 for (i = 0; i < nssid; i++) {
470 if (ni->ni_esslen == ssids[i].len &&
471 memcmp(ni->ni_essid, ssids[i].ssid, ni->ni_esslen) == 0)
472 return 1;
473 }
474 return 0;
475 }
476
477 /*
478 * Test a node for suitability/compatibility.
479 */
480 static int
481 check_bss(struct ieee80211vap *vap, struct ieee80211_node *ni)
482 {
483 struct ieee80211com *ic = ni->ni_ic;
484 uint8_t rate;
485
486 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan)))
487 return 0;
488 if (vap->iv_opmode == IEEE80211_M_IBSS) {
489 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0)
490 return 0;
491 } else {
492 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0)
493 return 0;
494 }
495 if (vap->iv_flags & IEEE80211_F_PRIVACY) {
496 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0)
497 return 0;
498 } else {
499 /* XXX does this mean privacy is supported or required? */
500 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY)
501 return 0;
502 }
503 rate = ieee80211_fix_rate(ni, &ni->ni_rates,
504 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE);
505 if (rate & IEEE80211_RATE_BASIC)
506 return 0;
507 if (vap->iv_des_nssid != 0 &&
508 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid))
509 return 0;
510 if ((vap->iv_flags & IEEE80211_F_DESBSSID) &&
511 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid))
512 return 0;
513 return 1;
514 }
515
516 #ifdef IEEE80211_DEBUG
517 /*
518 * Display node suitability/compatibility.
519 */
520 static void
521 check_bss_debug(struct ieee80211vap *vap, struct ieee80211_node *ni)
522 {
523 struct ieee80211com *ic = ni->ni_ic;
524 uint8_t rate;
525 int fail;
526
527 fail = 0;
528 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan)))
529 fail |= 0x01;
530 if (vap->iv_opmode == IEEE80211_M_IBSS) {
531 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0)
532 fail |= 0x02;
533 } else {
534 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0)
535 fail |= 0x02;
536 }
537 if (vap->iv_flags & IEEE80211_F_PRIVACY) {
538 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0)
539 fail |= 0x04;
540 } else {
541 /* XXX does this mean privacy is supported or required? */
542 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY)
543 fail |= 0x04;
544 }
545 rate = ieee80211_fix_rate(ni, &ni->ni_rates,
546 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE);
547 if (rate & IEEE80211_RATE_BASIC)
548 fail |= 0x08;
549 if (vap->iv_des_nssid != 0 &&
550 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid))
551 fail |= 0x10;
552 if ((vap->iv_flags & IEEE80211_F_DESBSSID) &&
553 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid))
554 fail |= 0x20;
555
556 printf(" %c %s", fail ? '-' : '+', ether_sprintf(ni->ni_macaddr));
557 printf(" %s%c", ether_sprintf(ni->ni_bssid), fail & 0x20 ? '!' : ' ');
558 printf(" %3d%c",
559 ieee80211_chan2ieee(ic, ni->ni_chan), fail & 0x01 ? '!' : ' ');
560 printf(" %2dM%c", (rate & IEEE80211_RATE_VAL) / 2,
561 fail & 0x08 ? '!' : ' ');
562 printf(" %4s%c",
563 (ni->ni_capinfo & IEEE80211_CAPINFO_ESS) ? "ess" :
564 (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) ? "ibss" :
565 "????",
566 fail & 0x02 ? '!' : ' ');
567 printf(" %3s%c ",
568 (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) ? "wep" : "no",
569 fail & 0x04 ? '!' : ' ');
570 ieee80211_print_essid(ni->ni_essid, ni->ni_esslen);
571 printf("%s\n", fail & 0x10 ? "!" : "");
572 }
573 #endif /* IEEE80211_DEBUG */
574
575
576 int
577 ieee80211_ibss_merge_check(struct ieee80211_node *ni)
578 {
579 struct ieee80211vap *vap = ni->ni_vap;
580
581 if (ni == vap->iv_bss ||
582 IEEE80211_ADDR_EQ(ni->ni_bssid, vap->iv_bss->ni_bssid)) {
583 /* unchanged, nothing to do */
584 return 0;
585 }
586
587 if (!check_bss(vap, ni)) {
588 /* capabilities mismatch */
589 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC,
590 "%s: merge failed, capabilities mismatch\n", __func__);
591 #ifdef IEEE80211_DEBUG
592 if (ieee80211_msg_assoc(vap))
593 check_bss_debug(vap, ni);
594 #endif
595 vap->iv_stats.is_ibss_capmismatch++;
596 return 0;
597 }
598
599 return 1;
600 }
601
602 /*
603 * Check if the given node should populate the node table.
604 *
605 * We need to be in "see all beacons for all ssids" mode in order
606 * to do IBSS merges, however this means we will populate nodes for
607 * /all/ IBSS SSIDs, versus just the one we care about.
608 *
609 * So this check ensures the node can actually belong to our IBSS
610 * configuration. For now it simply checks the SSID.
611 */
612 int
613 ieee80211_ibss_node_check_new(struct ieee80211_node *ni,
614 const struct ieee80211_scanparams *scan)
615 {
616 struct ieee80211vap *vap = ni->ni_vap;
617 int i;
618
619 /*
620 * If we have no SSID and no scan SSID, return OK.
621 */
622 if (vap->iv_des_nssid == 0 && scan->ssid == NULL)
623 goto ok;
624
625 /*
626 * If we have one of (SSID, scan SSID) then return error.
627 */
628 if (!! (vap->iv_des_nssid == 0) != !! (scan->ssid == NULL))
629 goto mismatch;
630
631 /*
632 * Double-check - we need scan SSID.
633 */
634 if (scan->ssid == NULL)
635 goto mismatch;
636
637 /*
638 * Check if the scan SSID matches the SSID list for the VAP.
639 */
640 for (i = 0; i < vap->iv_des_nssid; i++) {
641
642 /* Sanity length check */
643 if (vap->iv_des_ssid[i].len != scan->ssid[1])
644 continue;
645
646 /* Note: SSID in the scan entry is the IE format */
647 if (memcmp(vap->iv_des_ssid[i].ssid, scan->ssid + 2,
648 vap->iv_des_ssid[i].len) == 0)
649 goto ok;
650 }
651
652 mismatch:
653 return (0);
654 ok:
655 return (1);
656 }
657
658 /*
659 * Handle 802.11 ad hoc network merge. The
660 * convention, set by the Wireless Ethernet Compatibility Alliance
661 * (WECA), is that an 802.11 station will change its BSSID to match
662 * the "oldest" 802.11 ad hoc network, on the same channel, that
663 * has the station's desired SSID. The "oldest" 802.11 network
664 * sends beacons with the greatest TSF timestamp.
665 *
666 * The caller is assumed to validate TSF's before attempting a merge.
667 *
668 * Return !0 if the BSSID changed, 0 otherwise.
669 */
670 int
671 ieee80211_ibss_merge(struct ieee80211_node *ni)
672 {
673 #ifdef IEEE80211_DEBUG
674 struct ieee80211vap *vap = ni->ni_vap;
675 struct ieee80211com *ic = ni->ni_ic;
676 #endif
677
678 if (! ieee80211_ibss_merge_check(ni))
679 return 0;
680
681 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC,
682 "%s: new bssid %s: %s preamble, %s slot time%s\n", __func__,
683 ether_sprintf(ni->ni_bssid),
684 ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long",
685 ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long",
686 ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : ""
687 );
688 return ieee80211_sta_join1(ieee80211_ref_node(ni));
689 }
690
691 /*
692 * Calculate HT channel promotion flags for all vaps.
693 * This assumes ni_chan have been setup for each vap.
694 */
695 static int
696 gethtadjustflags(struct ieee80211com *ic)
697 {
698 struct ieee80211vap *vap;
699 int flags;
700
701 flags = 0;
702 /* XXX locking */
703 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
704 if (vap->iv_state < IEEE80211_S_RUN)
705 continue;
706 switch (vap->iv_opmode) {
707 case IEEE80211_M_WDS:
708 case IEEE80211_M_STA:
709 case IEEE80211_M_AHDEMO:
710 case IEEE80211_M_HOSTAP:
711 case IEEE80211_M_IBSS:
712 case IEEE80211_M_MBSS:
713 flags |= ieee80211_htchanflags(vap->iv_bss->ni_chan);
714 break;
715 default:
716 break;
717 }
718 }
719 return flags;
720 }
721
722 /*
723 * Calculate VHT channel promotion flags for all vaps.
724 * This assumes ni_chan have been setup for each vap.
725 */
726 static int
727 getvhtadjustflags(struct ieee80211com *ic)
728 {
729 struct ieee80211vap *vap;
730 int flags;
731
732 flags = 0;
733 /* XXX locking */
734 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
735 if (vap->iv_state < IEEE80211_S_RUN)
736 continue;
737 switch (vap->iv_opmode) {
738 case IEEE80211_M_WDS:
739 case IEEE80211_M_STA:
740 case IEEE80211_M_AHDEMO:
741 case IEEE80211_M_HOSTAP:
742 case IEEE80211_M_IBSS:
743 case IEEE80211_M_MBSS:
744 flags |= ieee80211_vhtchanflags(vap->iv_bss->ni_chan);
745 break;
746 default:
747 break;
748 }
749 }
750 return flags;
751 }
752
753 /*
754 * Check if the current channel needs to change based on whether
755 * any vap's are using HT20/HT40. This is used to sync the state
756 * of ic_curchan after a channel width change on a running vap.
757 *
758 * Same applies for VHT.
759 */
760 void
761 ieee80211_sync_curchan(struct ieee80211com *ic)
762 {
763 struct ieee80211_channel *c;
764
765 c = ieee80211_ht_adjust_channel(ic, ic->ic_curchan, gethtadjustflags(ic));
766 c = ieee80211_vht_adjust_channel(ic, c, getvhtadjustflags(ic));
767
768 if (c != ic->ic_curchan) {
769 ic->ic_curchan = c;
770 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan);
771 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan);
772 IEEE80211_UNLOCK(ic);
773 ic->ic_set_channel(ic);
774 ieee80211_radiotap_chan_change(ic);
775 IEEE80211_LOCK(ic);
776 }
777 }
778
779 /*
780 * Setup the current channel. The request channel may be
781 * promoted if other vap's are operating with HT20/HT40.
782 */
783 void
784 ieee80211_setupcurchan(struct ieee80211com *ic, struct ieee80211_channel *c)
785 {
786 if (ic->ic_htcaps & IEEE80211_HTC_HT) {
787 int flags = gethtadjustflags(ic);
788 /*
789 * Check for channel promotion required to support the
790 * set of running vap's. This assumes we are called
791 * after ni_chan is setup for each vap.
792 */
793 /* XXX VHT? */
794 /* NB: this assumes IEEE80211_FHT_USEHT40 > IEEE80211_FHT_HT */
795 if (flags > ieee80211_htchanflags(c))
796 c = ieee80211_ht_adjust_channel(ic, c, flags);
797 }
798
799 /*
800 * VHT promotion - this will at least promote to VHT20/40
801 * based on what HT has done; it may further promote the
802 * channel to VHT80 or above.
803 */
804 if (ic->ic_vhtcaps != 0) {
805 int flags = getvhtadjustflags(ic);
806 if (flags > ieee80211_vhtchanflags(c))
807 c = ieee80211_vht_adjust_channel(ic, c, flags);
808 }
809
810 ic->ic_bsschan = ic->ic_curchan = c;
811 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan);
812 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan);
813 }
814
815 /*
816 * Change the current channel. The channel change is guaranteed to have
817 * happened before the next state change.
818 */
819 void
820 ieee80211_setcurchan(struct ieee80211com *ic, struct ieee80211_channel *c)
821 {
822 ieee80211_setupcurchan(ic, c);
823 ieee80211_runtask(ic, &ic->ic_chan_task);
824 }
825
826 void
827 ieee80211_update_chw(struct ieee80211com *ic)
828 {
829
830 ieee80211_setupcurchan(ic, ic->ic_curchan);
831 ieee80211_runtask(ic, &ic->ic_chw_task);
832 }
833
834 /*
835 * Join the specified IBSS/BSS network. The node is assumed to
836 * be passed in with a held reference.
837 */
838 static int
839 ieee80211_sta_join1(struct ieee80211_node *selbs)
840 {
841 struct ieee80211vap *vap = selbs->ni_vap;
842 struct ieee80211com *ic = selbs->ni_ic;
843 struct ieee80211_node *obss;
844 int canreassoc;
845
846 /*
847 * Committed to selbs, setup state.
848 */
849 obss = vap->iv_bss;
850 /*
851 * Check if old+new node have the same address in which
852 * case we can reassociate when operating in sta mode.
853 */
854 canreassoc = (obss != NULL &&
855 vap->iv_state == IEEE80211_S_RUN &&
856 IEEE80211_ADDR_EQ(obss->ni_macaddr, selbs->ni_macaddr));
857 vap->iv_bss = selbs; /* NB: caller assumed to bump refcnt */
858 if (obss != NULL) {
859 struct ieee80211_node_table *nt = obss->ni_table;
860
861 copy_bss(selbs, obss);
862 ieee80211_node_decref(obss); /* iv_bss reference */
863
864 IEEE80211_NODE_LOCK(nt);
865 node_reclaim(nt, obss); /* station table reference */
866 IEEE80211_NODE_UNLOCK(nt);
867
868 obss = NULL; /* NB: guard against later use */
869 }
870
871 /*
872 * Delete unusable rates; we've already checked
873 * that the negotiated rate set is acceptable.
874 */
875 ieee80211_fix_rate(vap->iv_bss, &vap->iv_bss->ni_rates,
876 IEEE80211_F_DODEL | IEEE80211_F_JOIN);
877
878 ieee80211_setcurchan(ic, selbs->ni_chan);
879 /*
880 * Set the erp state (mostly the slot time) to deal with
881 * the auto-select case; this should be redundant if the
882 * mode is locked.
883 */
884 ieee80211_reset_erp(ic);
885 ieee80211_wme_initparams(vap);
886
887 if (vap->iv_opmode == IEEE80211_M_STA) {
888 if (canreassoc) {
889 /* Reassociate */
890 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 1);
891 } else {
892 /*
893 * Act as if we received a DEAUTH frame in case we
894 * are invoked from the RUN state. This will cause
895 * us to try to re-authenticate if we are operating
896 * as a station.
897 */
898 ieee80211_new_state(vap, IEEE80211_S_AUTH,
899 IEEE80211_FC0_SUBTYPE_DEAUTH);
900 }
901 } else
902 ieee80211_new_state(vap, IEEE80211_S_RUN, -1);
903 return 1;
904 }
905
906 int
907 ieee80211_sta_join(struct ieee80211vap *vap, struct ieee80211_channel *chan,
908 const struct ieee80211_scan_entry *se)
909 {
910 struct ieee80211com *ic = vap->iv_ic;
911 struct ieee80211_node *ni;
912 int do_ht = 0;
913
914 ni = ieee80211_alloc_node(&ic->ic_sta, vap, se->se_macaddr);
915 if (ni == NULL) {
916 /* XXX msg */
917 return 0;
918 }
919
920 /*
921 * Expand scan state into node's format.
922 * XXX may not need all this stuff
923 */
924 IEEE80211_ADDR_COPY(ni->ni_bssid, se->se_bssid);
925 ni->ni_esslen = se->se_ssid[1];
926 memcpy(ni->ni_essid, se->se_ssid+2, ni->ni_esslen);
927 ni->ni_tstamp.tsf = se->se_tstamp.tsf;
928 ni->ni_intval = se->se_intval;
929 ni->ni_capinfo = se->se_capinfo;
930 ni->ni_chan = chan;
931 ni->ni_timoff = se->se_timoff;
932 ni->ni_fhdwell = se->se_fhdwell;
933 ni->ni_fhindex = se->se_fhindex;
934 ni->ni_erp = se->se_erp;
935 IEEE80211_RSSI_LPF(ni->ni_avgrssi, se->se_rssi);
936 ni->ni_noise = se->se_noise;
937 if (vap->iv_opmode == IEEE80211_M_STA) {
938 /* NB: only infrastructure mode requires an associd */
939 ni->ni_flags |= IEEE80211_NODE_ASSOCID;
940 }
941
942 if (ieee80211_ies_init(&ni->ni_ies, se->se_ies.data, se->se_ies.len)) {
943 ieee80211_ies_expand(&ni->ni_ies);
944 #ifdef IEEE80211_SUPPORT_SUPERG
945 if (ni->ni_ies.ath_ie != NULL)
946 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie);
947 #endif
948 if (ni->ni_ies.htcap_ie != NULL)
949 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie);
950 if (ni->ni_ies.htinfo_ie != NULL)
951 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie);
952 #ifdef IEEE80211_SUPPORT_MESH
953 if (ni->ni_ies.meshid_ie != NULL)
954 ieee80211_parse_meshid(ni, ni->ni_ies.meshid_ie);
955 #endif
956 #ifdef IEEE80211_SUPPORT_TDMA
957 if (ni->ni_ies.tdma_ie != NULL)
958 ieee80211_parse_tdma(ni, ni->ni_ies.tdma_ie);
959 #endif
960 if (ni->ni_ies.vhtcap_ie != NULL)
961 ieee80211_parse_vhtcap(ni, ni->ni_ies.vhtcap_ie);
962 if (ni->ni_ies.vhtopmode_ie != NULL)
963 ieee80211_parse_vhtopmode(ni, ni->ni_ies.vhtopmode_ie);
964
965 /* XXX parse BSSLOAD IE */
966 /* XXX parse TXPWRENV IE */
967 /* XXX parse APCHANREP IE */
968 }
969
970 vap->iv_dtim_period = se->se_dtimperiod;
971 vap->iv_dtim_count = 0;
972
973 /* NB: must be after ni_chan is setup */
974 ieee80211_setup_rates(ni, se->se_rates, se->se_xrates,
975 IEEE80211_F_DOSORT);
976 if (ieee80211_iserp_rateset(&ni->ni_rates))
977 ni->ni_flags |= IEEE80211_NODE_ERP;
978
979 /*
980 * Setup HT state for this node if it's available, otherwise
981 * non-STA modes won't pick this state up.
982 *
983 * For IBSS and related modes that don't go through an
984 * association request/response, the only appropriate place
985 * to setup the HT state is here.
986 */
987 if (ni->ni_ies.htinfo_ie != NULL &&
988 ni->ni_ies.htcap_ie != NULL &&
989 vap->iv_flags_ht & IEEE80211_FHT_HT) {
990 ieee80211_ht_node_init(ni);
991 ieee80211_ht_updateparams(ni,
992 ni->ni_ies.htcap_ie,
993 ni->ni_ies.htinfo_ie);
994 do_ht = 1;
995 }
996
997 /*
998 * Setup VHT state for this node if it's available.
999 * Same as the above.
1000 *
1001 * For now, don't allow 2GHz VHT operation.
1002 */
1003 if (ni->ni_ies.vhtopmode_ie != NULL &&
1004 ni->ni_ies.vhtcap_ie != NULL &&
1005 vap->iv_flags_vht & IEEE80211_FVHT_VHT) {
1006 if (IEEE80211_IS_CHAN_2GHZ(ni->ni_chan)) {
1007 printf("%s: BSS %6D: 2GHz channel, VHT info; ignoring\n",
1008 __func__,
1009 ni->ni_macaddr,
1010 ":");
1011 } else {
1012 ieee80211_vht_node_init(ni);
1013 ieee80211_vht_updateparams(ni,
1014 ni->ni_ies.vhtcap_ie,
1015 ni->ni_ies.vhtopmode_ie);
1016 ieee80211_setup_vht_rates(ni, ni->ni_ies.vhtcap_ie,
1017 ni->ni_ies.vhtopmode_ie);
1018 do_ht = 1;
1019 }
1020 }
1021
1022 /* Finally do the node channel change */
1023 if (do_ht) {
1024 ieee80211_ht_updateparams_final(ni, ni->ni_ies.htcap_ie,
1025 ni->ni_ies.htinfo_ie);
1026 ieee80211_setup_htrates(ni, ni->ni_ies.htcap_ie,
1027 IEEE80211_F_JOIN | IEEE80211_F_DOBRS);
1028 ieee80211_setup_basic_htrates(ni, ni->ni_ies.htinfo_ie);
1029 }
1030
1031 /* XXX else check for ath FF? */
1032 /* XXX QoS? Difficult given that WME config is specific to a master */
1033
1034 ieee80211_node_setuptxparms(ni);
1035 ieee80211_ratectl_node_init(ni);
1036
1037 return ieee80211_sta_join1(ieee80211_ref_node(ni));
1038 }
1039
1040 /*
1041 * Leave the specified IBSS/BSS network. The node is assumed to
1042 * be passed in with a held reference.
1043 */
1044 void
1045 ieee80211_sta_leave(struct ieee80211_node *ni)
1046 {
1047 struct ieee80211com *ic = ni->ni_ic;
1048
1049 ic->ic_node_cleanup(ni);
1050 ieee80211_notify_node_leave(ni);
1051 }
1052
1053 /*
1054 * Send a deauthenticate frame and drop the station.
1055 */
1056 void
1057 ieee80211_node_deauth(struct ieee80211_node *ni, int reason)
1058 {
1059 /* NB: bump the refcnt to be sure temporary nodes are not reclaimed */
1060 ieee80211_ref_node(ni);
1061 if (ni->ni_associd != 0)
1062 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH, reason);
1063 ieee80211_node_leave(ni);
1064 ieee80211_free_node(ni);
1065 }
1066
1067 static struct ieee80211_node *
1068 node_alloc(struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN])
1069 {
1070 struct ieee80211_node *ni;
1071
1072 ni = (struct ieee80211_node *) IEEE80211_MALLOC(sizeof(struct ieee80211_node),
1073 M_80211_NODE, IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
1074 return ni;
1075 }
1076
1077 /*
1078 * Initialize an ie blob with the specified data. If previous
1079 * data exists re-use the data block. As a side effect we clear
1080 * all references to specific ie's; the caller is required to
1081 * recalculate them.
1082 */
1083 int
1084 ieee80211_ies_init(struct ieee80211_ies *ies, const uint8_t *data, int len)
1085 {
1086 /* NB: assumes data+len are the last fields */
1087 memset(ies, 0, offsetof(struct ieee80211_ies, data));
1088 if (ies->data != NULL && ies->len != len) {
1089 /* data size changed */
1090 IEEE80211_FREE(ies->data, M_80211_NODE_IE);
1091 ies->data = NULL;
1092 }
1093 if (ies->data == NULL) {
1094 ies->data = (uint8_t *) IEEE80211_MALLOC(len, M_80211_NODE_IE,
1095 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
1096 if (ies->data == NULL) {
1097 ies->len = 0;
1098 /* NB: pointers have already been zero'd above */
1099 return 0;
1100 }
1101 }
1102 memcpy(ies->data, data, len);
1103 ies->len = len;
1104 return 1;
1105 }
1106
1107 /*
1108 * Reclaim storage for an ie blob.
1109 */
1110 void
1111 ieee80211_ies_cleanup(struct ieee80211_ies *ies)
1112 {
1113 if (ies->data != NULL)
1114 IEEE80211_FREE(ies->data, M_80211_NODE_IE);
1115 }
1116
1117 /*
1118 * Expand an ie blob data contents and to fillin individual
1119 * ie pointers. The data blob is assumed to be well-formed;
1120 * we don't do any validity checking of ie lengths.
1121 */
1122 void
1123 ieee80211_ies_expand(struct ieee80211_ies *ies)
1124 {
1125 uint8_t *ie;
1126 int ielen;
1127
1128 ie = ies->data;
1129 ielen = ies->len;
1130 while (ielen > 0) {
1131 switch (ie[0]) {
1132 case IEEE80211_ELEMID_VENDOR:
1133 if (iswpaoui(ie))
1134 ies->wpa_ie = ie;
1135 else if (iswmeoui(ie))
1136 ies->wme_ie = ie;
1137 #ifdef IEEE80211_SUPPORT_SUPERG
1138 else if (isatherosoui(ie))
1139 ies->ath_ie = ie;
1140 #endif
1141 #ifdef IEEE80211_SUPPORT_TDMA
1142 else if (istdmaoui(ie))
1143 ies->tdma_ie = ie;
1144 #endif
1145 break;
1146 case IEEE80211_ELEMID_RSN:
1147 ies->rsn_ie = ie;
1148 break;
1149 case IEEE80211_ELEMID_HTCAP:
1150 ies->htcap_ie = ie;
1151 break;
1152 case IEEE80211_ELEMID_HTINFO:
1153 ies->htinfo_ie = ie;
1154 break;
1155 #ifdef IEEE80211_SUPPORT_MESH
1156 case IEEE80211_ELEMID_MESHID:
1157 ies->meshid_ie = ie;
1158 break;
1159 #endif
1160 case IEEE80211_ELEMID_VHT_CAP:
1161 ies->vhtcap_ie = ie;
1162 break;
1163 case IEEE80211_ELEMID_VHT_OPMODE:
1164 ies->vhtopmode_ie = ie;
1165 break;
1166 case IEEE80211_ELEMID_VHT_PWR_ENV:
1167 ies->vhtpwrenv_ie = ie;
1168 break;
1169 case IEEE80211_ELEMID_BSSLOAD:
1170 ies->bssload_ie = ie;
1171 break;
1172 case IEEE80211_ELEMID_APCHANREP:
1173 ies->apchanrep_ie = ie;
1174 break;
1175 }
1176 ielen -= 2 + ie[1];
1177 ie += 2 + ie[1];
1178 }
1179 }
1180
1181 /*
1182 * Reclaim any resources in a node and reset any critical
1183 * state. Typically nodes are free'd immediately after,
1184 * but in some cases the storage may be reused so we need
1185 * to insure consistent state (should probably fix that).
1186 */
1187 static void
1188 node_cleanup(struct ieee80211_node *ni)
1189 {
1190 struct ieee80211vap *vap = ni->ni_vap;
1191 struct ieee80211com *ic = ni->ni_ic;
1192 int i;
1193
1194 /* NB: preserve ni_table */
1195 if (ni->ni_flags & IEEE80211_NODE_PWR_MGT) {
1196 if (vap->iv_opmode != IEEE80211_M_STA)
1197 vap->iv_ps_sta--;
1198 ni->ni_flags &= ~IEEE80211_NODE_PWR_MGT;
1199 IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni,
1200 "power save mode off, %u sta's in ps mode", vap->iv_ps_sta);
1201 }
1202 /*
1203 * Cleanup any VHT and HT-related state.
1204 */
1205 if (ni->ni_flags & IEEE80211_NODE_VHT)
1206 ieee80211_vht_node_cleanup(ni);
1207 if (ni->ni_flags & IEEE80211_NODE_HT)
1208 ieee80211_ht_node_cleanup(ni);
1209 #ifdef IEEE80211_SUPPORT_SUPERG
1210 /* Always do FF node cleanup; for A-MSDU */
1211 ieee80211_ff_node_cleanup(ni);
1212 #endif
1213 #ifdef IEEE80211_SUPPORT_MESH
1214 /*
1215 * Cleanup any mesh-related state.
1216 */
1217 if (vap->iv_opmode == IEEE80211_M_MBSS)
1218 ieee80211_mesh_node_cleanup(ni);
1219 #endif
1220 /*
1221 * Clear any staging queue entries.
1222 */
1223 ieee80211_ageq_drain_node(&ic->ic_stageq, ni);
1224
1225 /*
1226 * Clear AREF flag that marks the authorization refcnt bump
1227 * has happened. This is probably not needed as the node
1228 * should always be removed from the table so not found but
1229 * do it just in case.
1230 * Likewise clear the ASSOCID flag as these flags are intended
1231 * to be managed in tandem.
1232 */
1233 ni->ni_flags &= ~(IEEE80211_NODE_AREF | IEEE80211_NODE_ASSOCID);
1234
1235 /*
1236 * Drain power save queue and, if needed, clear TIM.
1237 */
1238 if (ieee80211_node_psq_drain(ni) != 0 && vap->iv_set_tim != NULL)
1239 vap->iv_set_tim(ni, 0);
1240
1241 ni->ni_associd = 0;
1242 if (ni->ni_challenge != NULL) {
1243 IEEE80211_FREE(ni->ni_challenge, M_80211_NODE);
1244 ni->ni_challenge = NULL;
1245 }
1246 /*
1247 * Preserve SSID, WPA, and WME ie's so the bss node is
1248 * reusable during a re-auth/re-assoc state transition.
1249 * If we remove these data they will not be recreated
1250 * because they come from a probe-response or beacon frame
1251 * which cannot be expected prior to the association-response.
1252 * This should not be an issue when operating in other modes
1253 * as stations leaving always go through a full state transition
1254 * which will rebuild this state.
1255 *
1256 * XXX does this leave us open to inheriting old state?
1257 */
1258 for (i = 0; i < nitems(ni->ni_rxfrag); i++)
1259 if (ni->ni_rxfrag[i] != NULL) {
1260 m_freem(ni->ni_rxfrag[i]);
1261 ni->ni_rxfrag[i] = NULL;
1262 }
1263 /*
1264 * Must be careful here to remove any key map entry w/o a LOR.
1265 */
1266 ieee80211_node_delucastkey(ni);
1267 }
1268
1269 static void
1270 node_free(struct ieee80211_node *ni)
1271 {
1272 struct ieee80211com *ic = ni->ni_ic;
1273
1274 ieee80211_ratectl_node_deinit(ni);
1275 ic->ic_node_cleanup(ni);
1276 ieee80211_ies_cleanup(&ni->ni_ies);
1277 ieee80211_psq_cleanup(&ni->ni_psq);
1278 IEEE80211_FREE(ni, M_80211_NODE);
1279 }
1280
1281 static void
1282 node_age(struct ieee80211_node *ni)
1283 {
1284 struct ieee80211vap *vap = ni->ni_vap;
1285
1286 /*
1287 * Age frames on the power save queue.
1288 */
1289 if (ieee80211_node_psq_age(ni) != 0 &&
1290 ni->ni_psq.psq_len == 0 && vap->iv_set_tim != NULL)
1291 vap->iv_set_tim(ni, 0);
1292 /*
1293 * Age out HT resources (e.g. frames on the
1294 * A-MPDU reorder queues).
1295 */
1296 if (ni->ni_associd != 0 && (ni->ni_flags & IEEE80211_NODE_HT))
1297 ieee80211_ht_node_age(ni);
1298 }
1299
1300 static int8_t
1301 node_getrssi(const struct ieee80211_node *ni)
1302 {
1303 uint32_t avgrssi = ni->ni_avgrssi;
1304 int32_t rssi;
1305
1306 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER)
1307 return 0;
1308 rssi = IEEE80211_RSSI_GET(avgrssi);
1309 return rssi < 0 ? 0 : rssi > 127 ? 127 : rssi;
1310 }
1311
1312 static void
1313 node_getsignal(const struct ieee80211_node *ni, int8_t *rssi, int8_t *noise)
1314 {
1315 *rssi = node_getrssi(ni);
1316 *noise = ni->ni_noise;
1317 }
1318
1319 static void
1320 node_getmimoinfo(const struct ieee80211_node *ni,
1321 struct ieee80211_mimo_info *info)
1322 {
1323 int i;
1324 uint32_t avgrssi;
1325 int32_t rssi;
1326
1327 bzero(info, sizeof(*info));
1328
1329 for (i = 0; i < MIN(IEEE80211_MAX_CHAINS, ni->ni_mimo_chains); i++) {
1330 /* Note: for now, just pri20 channel info */
1331 avgrssi = ni->ni_mimo_rssi_ctl[i];
1332 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) {
1333 info->ch[i].rssi[0] = 0;
1334 } else {
1335 rssi = IEEE80211_RSSI_GET(avgrssi);
1336 info->ch[i].rssi[0] = rssi < 0 ? 0 : rssi > 127 ? 127 : rssi;
1337 }
1338 info->ch[i].noise[0] = ni->ni_mimo_noise_ctl[i];
1339 }
1340
1341 /* XXX ext radios? */
1342
1343 /* XXX EVM? */
1344 }
1345
1346 static void
1347 ieee80211_add_node_nt(struct ieee80211_node_table *nt,
1348 struct ieee80211_node *ni)
1349 {
1350 struct ieee80211com *ic = nt->nt_ic;
1351 int hash;
1352
1353 IEEE80211_NODE_LOCK_ASSERT(nt);
1354
1355 hash = IEEE80211_NODE_HASH(ic, ni->ni_macaddr);
1356 (void) ic; /* XXX IEEE80211_NODE_HASH */
1357 TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list);
1358 LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash);
1359 nt->nt_count++;
1360 ni->ni_table = nt;
1361 }
1362
1363 static void
1364 ieee80211_del_node_nt(struct ieee80211_node_table *nt,
1365 struct ieee80211_node *ni)
1366 {
1367
1368 IEEE80211_NODE_LOCK_ASSERT(nt);
1369
1370 TAILQ_REMOVE(&nt->nt_node, ni, ni_list);
1371 LIST_REMOVE(ni, ni_hash);
1372 nt->nt_count--;
1373 KASSERT(nt->nt_count >= 0,
1374 ("nt_count is negative (%d)!\n", nt->nt_count));
1375 ni->ni_table = NULL;
1376 }
1377
1378 struct ieee80211_node *
1379 ieee80211_alloc_node(struct ieee80211_node_table *nt,
1380 struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN])
1381 {
1382 struct ieee80211com *ic = nt->nt_ic;
1383 struct ieee80211_node *ni;
1384
1385 ni = ic->ic_node_alloc(vap, macaddr);
1386 if (ni == NULL) {
1387 vap->iv_stats.is_rx_nodealloc++;
1388 return NULL;
1389 }
1390
1391 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1392 "%s %p<%s> in %s table\n", __func__, ni,
1393 ether_sprintf(macaddr), nt->nt_name);
1394
1395 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr);
1396 ieee80211_node_initref(ni); /* mark referenced */
1397 ni->ni_chan = IEEE80211_CHAN_ANYC;
1398 ni->ni_authmode = IEEE80211_AUTH_OPEN;
1399 ni->ni_txpower = ic->ic_txpowlimit; /* max power */
1400 ni->ni_txparms = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)];
1401 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE);
1402 ni->ni_avgrssi = IEEE80211_RSSI_DUMMY_MARKER;
1403 ni->ni_inact_reload = nt->nt_inact_init;
1404 ni->ni_inact = ni->ni_inact_reload;
1405 ni->ni_ath_defkeyix = 0x7fff;
1406 ieee80211_psq_init(&ni->ni_psq, "unknown");
1407 #ifdef IEEE80211_SUPPORT_MESH
1408 if (vap->iv_opmode == IEEE80211_M_MBSS)
1409 ieee80211_mesh_node_init(vap, ni);
1410 #endif
1411 IEEE80211_NODE_LOCK(nt);
1412 ieee80211_add_node_nt(nt, ni);
1413 ni->ni_vap = vap;
1414 ni->ni_ic = ic;
1415 IEEE80211_NODE_UNLOCK(nt);
1416
1417 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni,
1418 "%s: inact_reload %u", __func__, ni->ni_inact_reload);
1419
1420 ieee80211_ratectl_node_init(ni);
1421
1422 return ni;
1423 }
1424
1425 /*
1426 * Craft a temporary node suitable for sending a management frame
1427 * to the specified station. We craft only as much state as we
1428 * need to do the work since the node will be immediately reclaimed
1429 * once the send completes.
1430 */
1431 struct ieee80211_node *
1432 ieee80211_tmp_node(struct ieee80211vap *vap,
1433 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1434 {
1435 struct ieee80211com *ic = vap->iv_ic;
1436 struct ieee80211_node *ni;
1437
1438 ni = ic->ic_node_alloc(vap, macaddr);
1439 if (ni != NULL) {
1440 struct ieee80211_node *bss = vap->iv_bss;
1441
1442 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1443 "%s %p<%s>\n", __func__, ni, ether_sprintf(macaddr));
1444
1445 ni->ni_table = NULL; /* NB: pedantic */
1446 ni->ni_ic = ic; /* NB: needed to set channel */
1447 ni->ni_vap = vap;
1448
1449 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr);
1450 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid);
1451 ieee80211_node_initref(ni); /* mark referenced */
1452 /* NB: required by ieee80211_fix_rate */
1453 ieee80211_node_set_chan(ni, bss->ni_chan);
1454 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey,
1455 IEEE80211_KEYIX_NONE);
1456 ni->ni_txpower = bss->ni_txpower;
1457 /* XXX optimize away */
1458 ieee80211_psq_init(&ni->ni_psq, "unknown");
1459
1460 ieee80211_ratectl_node_init(ni);
1461 } else {
1462 /* XXX msg */
1463 vap->iv_stats.is_rx_nodealloc++;
1464 }
1465 return ni;
1466 }
1467
1468 struct ieee80211_node *
1469 ieee80211_dup_bss(struct ieee80211vap *vap,
1470 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1471 {
1472 struct ieee80211com *ic = vap->iv_ic;
1473 struct ieee80211_node *ni;
1474
1475 ni = ieee80211_alloc_node(&ic->ic_sta, vap, macaddr);
1476 if (ni != NULL) {
1477 struct ieee80211_node *bss = vap->iv_bss;
1478 /*
1479 * Inherit from iv_bss.
1480 */
1481 copy_bss(ni, bss);
1482 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid);
1483 ieee80211_node_set_chan(ni, bss->ni_chan);
1484 }
1485 return ni;
1486 }
1487
1488 /*
1489 * Create a bss node for a legacy WDS vap. The far end does
1490 * not associate so we just create create a new node and
1491 * simulate an association. The caller is responsible for
1492 * installing the node as the bss node and handling any further
1493 * setup work like authorizing the port.
1494 */
1495 struct ieee80211_node *
1496 ieee80211_node_create_wds(struct ieee80211vap *vap,
1497 const uint8_t bssid[IEEE80211_ADDR_LEN], struct ieee80211_channel *chan)
1498 {
1499 struct ieee80211com *ic = vap->iv_ic;
1500 struct ieee80211_node *ni;
1501
1502 /* XXX check if node already in sta table? */
1503 ni = ieee80211_alloc_node(&ic->ic_sta, vap, bssid);
1504 if (ni != NULL) {
1505 ni->ni_wdsvap = vap;
1506 IEEE80211_ADDR_COPY(ni->ni_bssid, bssid);
1507 /*
1508 * Inherit any manually configured settings.
1509 */
1510 copy_bss(ni, vap->iv_bss);
1511 ieee80211_node_set_chan(ni, chan);
1512 /* NB: propagate ssid so available to WPA supplicant */
1513 ni->ni_esslen = vap->iv_des_ssid[0].len;
1514 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen);
1515 /* NB: no associd for peer */
1516 /*
1517 * There are no management frames to use to
1518 * discover neighbor capabilities, so blindly
1519 * propagate the local configuration.
1520 */
1521 if (vap->iv_flags & IEEE80211_F_WME)
1522 ni->ni_flags |= IEEE80211_NODE_QOS;
1523 #ifdef IEEE80211_SUPPORT_SUPERG
1524 if (vap->iv_flags & IEEE80211_F_FF)
1525 ni->ni_flags |= IEEE80211_NODE_FF;
1526 #endif
1527 /* XXX VHT */
1528 if ((ic->ic_htcaps & IEEE80211_HTC_HT) &&
1529 (vap->iv_flags_ht & IEEE80211_FHT_HT)) {
1530 /*
1531 * Device is HT-capable and HT is enabled for
1532 * the vap; setup HT operation. On return
1533 * ni_chan will be adjusted to an HT channel.
1534 */
1535 ieee80211_ht_wds_init(ni);
1536 if (vap->iv_flags_vht & IEEE80211_FVHT_VHT) {
1537 printf("%s: TODO: vht_wds_init\n", __func__);
1538 }
1539 } else {
1540 struct ieee80211_channel *c = ni->ni_chan;
1541 /*
1542 * Force a legacy channel to be used.
1543 */
1544 c = ieee80211_find_channel(ic,
1545 c->ic_freq, c->ic_flags &~ IEEE80211_CHAN_HT);
1546 KASSERT(c != NULL, ("no legacy channel, %u/%x",
1547 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags));
1548 ni->ni_chan = c;
1549 }
1550 }
1551 return ni;
1552 }
1553
1554 struct ieee80211_node *
1555 #ifdef IEEE80211_DEBUG_REFCNT
1556 ieee80211_find_node_locked_debug(struct ieee80211_node_table *nt,
1557 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line)
1558 #else
1559 ieee80211_find_node_locked(struct ieee80211_node_table *nt,
1560 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1561 #endif
1562 {
1563 struct ieee80211_node *ni;
1564 int hash;
1565
1566 IEEE80211_NODE_LOCK_ASSERT(nt);
1567
1568 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr);
1569 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) {
1570 if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) {
1571 ieee80211_ref_node(ni); /* mark referenced */
1572 #ifdef IEEE80211_DEBUG_REFCNT
1573 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1574 "%s (%s:%u) %p<%s> refcnt %d\n", __func__,
1575 func, line,
1576 ni, ether_sprintf(ni->ni_macaddr),
1577 ieee80211_node_refcnt(ni));
1578 #endif
1579 return ni;
1580 }
1581 }
1582 return NULL;
1583 }
1584
1585 struct ieee80211_node *
1586 #ifdef IEEE80211_DEBUG_REFCNT
1587 ieee80211_find_node_debug(struct ieee80211_node_table *nt,
1588 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line)
1589 #else
1590 ieee80211_find_node(struct ieee80211_node_table *nt,
1591 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1592 #endif
1593 {
1594 struct ieee80211_node *ni;
1595
1596 IEEE80211_NODE_LOCK(nt);
1597 ni = ieee80211_find_node_locked(nt, macaddr);
1598 IEEE80211_NODE_UNLOCK(nt);
1599 return ni;
1600 }
1601
1602 struct ieee80211_node *
1603 #ifdef IEEE80211_DEBUG_REFCNT
1604 ieee80211_find_vap_node_locked_debug(struct ieee80211_node_table *nt,
1605 const struct ieee80211vap *vap,
1606 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line)
1607 #else
1608 ieee80211_find_vap_node_locked(struct ieee80211_node_table *nt,
1609 const struct ieee80211vap *vap,
1610 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1611 #endif
1612 {
1613 struct ieee80211_node *ni;
1614 int hash;
1615
1616 IEEE80211_NODE_LOCK_ASSERT(nt);
1617
1618 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr);
1619 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) {
1620 if (ni->ni_vap == vap &&
1621 IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) {
1622 ieee80211_ref_node(ni); /* mark referenced */
1623 #ifdef IEEE80211_DEBUG_REFCNT
1624 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1625 "%s (%s:%u) %p<%s> refcnt %d\n", __func__,
1626 func, line,
1627 ni, ether_sprintf(ni->ni_macaddr),
1628 ieee80211_node_refcnt(ni));
1629 #endif
1630 return ni;
1631 }
1632 }
1633 return NULL;
1634 }
1635
1636 struct ieee80211_node *
1637 #ifdef IEEE80211_DEBUG_REFCNT
1638 ieee80211_find_vap_node_debug(struct ieee80211_node_table *nt,
1639 const struct ieee80211vap *vap,
1640 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line)
1641 #else
1642 ieee80211_find_vap_node(struct ieee80211_node_table *nt,
1643 const struct ieee80211vap *vap,
1644 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1645 #endif
1646 {
1647 struct ieee80211_node *ni;
1648
1649 IEEE80211_NODE_LOCK(nt);
1650 ni = ieee80211_find_vap_node_locked(nt, vap, macaddr);
1651 IEEE80211_NODE_UNLOCK(nt);
1652 return ni;
1653 }
1654
1655 /*
1656 * Fake up a node; this handles node discovery in adhoc mode.
1657 * Note that for the driver's benefit we we treat this like
1658 * an association so the driver has an opportunity to setup
1659 * it's private state.
1660 */
1661 struct ieee80211_node *
1662 ieee80211_fakeup_adhoc_node(struct ieee80211vap *vap,
1663 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1664 {
1665 struct ieee80211_node *ni;
1666
1667 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE | IEEE80211_MSG_ASSOC,
1668 "%s: mac<%s>\n", __func__, ether_sprintf(macaddr));
1669 ni = ieee80211_dup_bss(vap, macaddr);
1670 if (ni != NULL) {
1671 struct ieee80211com *ic = vap->iv_ic;
1672
1673 /* XXX no rate negotiation; just dup */
1674 ni->ni_rates = vap->iv_bss->ni_rates;
1675 if (ieee80211_iserp_rateset(&ni->ni_rates))
1676 ni->ni_flags |= IEEE80211_NODE_ERP;
1677 if (vap->iv_opmode == IEEE80211_M_AHDEMO) {
1678 /*
1679 * In adhoc demo mode there are no management
1680 * frames to use to discover neighbor capabilities,
1681 * so blindly propagate the local configuration
1682 * so we can do interesting things (e.g. use
1683 * WME to disable ACK's).
1684 */
1685 /*
1686 * XXX TODO: 11n?
1687 */
1688 if (vap->iv_flags & IEEE80211_F_WME)
1689 ni->ni_flags |= IEEE80211_NODE_QOS;
1690 #ifdef IEEE80211_SUPPORT_SUPERG
1691 if (vap->iv_flags & IEEE80211_F_FF)
1692 ni->ni_flags |= IEEE80211_NODE_FF;
1693 #endif
1694 }
1695 ieee80211_node_setuptxparms(ni);
1696 ieee80211_ratectl_node_init(ni);
1697
1698 /*
1699 * XXX TODO: 11n? At least 20MHz, at least A-MPDU RX,
1700 * not A-MPDU TX; not 11n rates, etc. We'll cycle
1701 * that after we hear that we can indeed do 11n
1702 * (either by a beacon frame or by a probe response.)
1703 */
1704
1705 /*
1706 * This is the first time we see the node.
1707 */
1708 if (ic->ic_newassoc != NULL)
1709 ic->ic_newassoc(ni, 1);
1710
1711 /*
1712 * Kick off a probe request to the given node;
1713 * we will then use the probe response to update
1714 * 11n/etc configuration state.
1715 *
1716 * XXX TODO: this isn't guaranteed, and until we get
1717 * a probe response, we won't be able to actually
1718 * do anything 802.11n related to the node.
1719 * So if this does indeed work, maybe we should hold
1720 * off on sending responses until we get the probe
1721 * response, or just default to some sensible subset
1722 * of 802.11n behaviour (eg always allow aggregation
1723 * negotiation TO us, but not FROM us, etc) so we
1724 * aren't entirely busted.
1725 */
1726 if (vap->iv_opmode == IEEE80211_M_IBSS) {
1727 ieee80211_send_probereq(ni, /* node */
1728 vap->iv_myaddr, /* SA */
1729 ni->ni_macaddr, /* DA */
1730 vap->iv_bss->ni_bssid, /* BSSID */
1731 vap->iv_bss->ni_essid,
1732 vap->iv_bss->ni_esslen); /* SSID */
1733 }
1734
1735 /* XXX not right for 802.1x/WPA */
1736 ieee80211_node_authorize(ni);
1737 }
1738 return ni;
1739 }
1740
1741 void
1742 ieee80211_init_neighbor(struct ieee80211_node *ni,
1743 const struct ieee80211_frame *wh,
1744 const struct ieee80211_scanparams *sp)
1745 {
1746 int do_ht_setup = 0, do_vht_setup = 0;
1747
1748 ni->ni_esslen = sp->ssid[1];
1749 memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]);
1750 IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3);
1751 memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp));
1752 ni->ni_intval = sp->bintval;
1753 ni->ni_capinfo = sp->capinfo;
1754 ni->ni_chan = ni->ni_ic->ic_curchan;
1755 ni->ni_fhdwell = sp->fhdwell;
1756 ni->ni_fhindex = sp->fhindex;
1757 ni->ni_erp = sp->erp;
1758 ni->ni_timoff = sp->timoff;
1759 #ifdef IEEE80211_SUPPORT_MESH
1760 if (ni->ni_vap->iv_opmode == IEEE80211_M_MBSS)
1761 ieee80211_mesh_init_neighbor(ni, wh, sp);
1762 #endif
1763 if (ieee80211_ies_init(&ni->ni_ies, sp->ies, sp->ies_len)) {
1764 ieee80211_ies_expand(&ni->ni_ies);
1765 if (ni->ni_ies.wme_ie != NULL)
1766 ni->ni_flags |= IEEE80211_NODE_QOS;
1767 else
1768 ni->ni_flags &= ~IEEE80211_NODE_QOS;
1769 #ifdef IEEE80211_SUPPORT_SUPERG
1770 if (ni->ni_ies.ath_ie != NULL)
1771 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie);
1772 #endif
1773 if (ni->ni_ies.htcap_ie != NULL)
1774 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie);
1775 if (ni->ni_ies.htinfo_ie != NULL)
1776 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie);
1777
1778 if (ni->ni_ies.vhtcap_ie != NULL)
1779 ieee80211_parse_vhtcap(ni, ni->ni_ies.vhtcap_ie);
1780 if (ni->ni_ies.vhtopmode_ie != NULL)
1781 ieee80211_parse_vhtopmode(ni, ni->ni_ies.vhtopmode_ie);
1782
1783 if ((ni->ni_ies.htcap_ie != NULL) &&
1784 (ni->ni_ies.htinfo_ie != NULL) &&
1785 (ni->ni_vap->iv_flags_ht & IEEE80211_FHT_HT)) {
1786 do_ht_setup = 1;
1787 }
1788
1789 if ((ni->ni_ies.vhtcap_ie != NULL) &&
1790 (ni->ni_ies.vhtopmode_ie != NULL) &&
1791 (ni->ni_vap->iv_flags_vht & IEEE80211_FVHT_VHT)) {
1792 do_vht_setup = 1;
1793 }
1794
1795 }
1796
1797 /* NB: must be after ni_chan is setup */
1798 ieee80211_setup_rates(ni, sp->rates, sp->xrates,
1799 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE |
1800 IEEE80211_F_DONEGO | IEEE80211_F_DODEL);
1801
1802 /*
1803 * If the neighbor is HT compatible, flip that on.
1804 */
1805 if (do_ht_setup) {
1806 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC,
1807 "%s: doing HT setup\n", __func__);
1808 ieee80211_ht_node_init(ni);
1809 ieee80211_ht_updateparams(ni,
1810 ni->ni_ies.htcap_ie,
1811 ni->ni_ies.htinfo_ie);
1812
1813 if (do_vht_setup) {
1814 if (IEEE80211_IS_CHAN_2GHZ(ni->ni_chan)) {
1815 printf("%s: BSS %6D: 2GHz channel, VHT info; ignoring\n",
1816 __func__,
1817 ni->ni_macaddr,
1818 ":");
1819 } else {
1820 ieee80211_vht_node_init(ni);
1821 ieee80211_vht_updateparams(ni,
1822 ni->ni_ies.vhtcap_ie,
1823 ni->ni_ies.vhtopmode_ie);
1824 ieee80211_setup_vht_rates(ni,
1825 ni->ni_ies.vhtcap_ie,
1826 ni->ni_ies.vhtopmode_ie);
1827 }
1828 }
1829
1830 /*
1831 * Finally do the channel upgrade/change based
1832 * on the HT/VHT configuration.
1833 */
1834 ieee80211_ht_updateparams_final(ni, ni->ni_ies.htcap_ie,
1835 ni->ni_ies.htinfo_ie);
1836 ieee80211_setup_htrates(ni,
1837 ni->ni_ies.htcap_ie,
1838 IEEE80211_F_JOIN | IEEE80211_F_DOBRS);
1839 ieee80211_setup_basic_htrates(ni,
1840 ni->ni_ies.htinfo_ie);
1841
1842 ieee80211_node_setuptxparms(ni);
1843 ieee80211_ratectl_node_init(ni);
1844
1845 /* Reassociate; we're now 11n/11ac */
1846 /*
1847 * XXX TODO: this is the wrong thing to do -
1848 * we're calling it with isnew=1 so the ath(4)
1849 * driver reinitialises the rate tables.
1850 * This "mostly" works for ath(4), but it won't
1851 * be right for firmware devices which allocate
1852 * node states.
1853 *
1854 * So, do we just create a new node and delete
1855 * the old one? Or?
1856 */
1857 if (ni->ni_ic->ic_newassoc)
1858 ni->ni_ic->ic_newassoc(ni, 1);
1859 }
1860 }
1861
1862 /*
1863 * Do node discovery in adhoc mode on receipt of a beacon
1864 * or probe response frame. Note that for the driver's
1865 * benefit we we treat this like an association so the
1866 * driver has an opportunity to setup it's private state.
1867 */
1868 struct ieee80211_node *
1869 ieee80211_add_neighbor(struct ieee80211vap *vap,
1870 const struct ieee80211_frame *wh,
1871 const struct ieee80211_scanparams *sp)
1872 {
1873 struct ieee80211_node *ni;
1874
1875 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC,
1876 "%s: mac<%s>\n", __func__, ether_sprintf(wh->i_addr2));
1877 ni = ieee80211_dup_bss(vap, wh->i_addr2);/* XXX alloc_node? */
1878 if (ni != NULL) {
1879 struct ieee80211com *ic = vap->iv_ic;
1880
1881 ieee80211_init_neighbor(ni, wh, sp);
1882 if (ieee80211_iserp_rateset(&ni->ni_rates))
1883 ni->ni_flags |= IEEE80211_NODE_ERP;
1884 ieee80211_node_setuptxparms(ni);
1885 ieee80211_ratectl_node_init(ni);
1886 if (ic->ic_newassoc != NULL)
1887 ic->ic_newassoc(ni, 1);
1888 /* XXX not right for 802.1x/WPA */
1889 ieee80211_node_authorize(ni);
1890 }
1891 return ni;
1892 }
1893
1894 #define IS_PROBEREQ(wh) \
1895 ((wh->i_fc[0] & (IEEE80211_FC0_TYPE_MASK|IEEE80211_FC0_SUBTYPE_MASK)) \
1896 == (IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ))
1897 #define IS_BCAST_PROBEREQ(wh) \
1898 (IS_PROBEREQ(wh) && IEEE80211_IS_MULTICAST( \
1899 ((const struct ieee80211_frame *)(wh))->i_addr3))
1900
1901 static __inline struct ieee80211_node *
1902 _find_rxnode(struct ieee80211_node_table *nt,
1903 const struct ieee80211_frame_min *wh)
1904 {
1905 if (IS_BCAST_PROBEREQ(wh))
1906 return NULL; /* spam bcast probe req to all vap's */
1907 return ieee80211_find_node_locked(nt, wh->i_addr2);
1908 }
1909
1910 /*
1911 * Locate the node for sender, track state, and then pass the
1912 * (referenced) node up to the 802.11 layer for its use. Note
1913 * we can return NULL if the sender is not in the table.
1914 */
1915 struct ieee80211_node *
1916 #ifdef IEEE80211_DEBUG_REFCNT
1917 ieee80211_find_rxnode_debug(struct ieee80211com *ic,
1918 const struct ieee80211_frame_min *wh, const char *func, int line)
1919 #else
1920 ieee80211_find_rxnode(struct ieee80211com *ic,
1921 const struct ieee80211_frame_min *wh)
1922 #endif
1923 {
1924 struct ieee80211_node_table *nt;
1925 struct ieee80211_node *ni;
1926
1927 nt = &ic->ic_sta;
1928 IEEE80211_NODE_LOCK(nt);
1929 ni = _find_rxnode(nt, wh);
1930 IEEE80211_NODE_UNLOCK(nt);
1931
1932 return ni;
1933 }
1934
1935 /*
1936 * Like ieee80211_find_rxnode but use the supplied h/w
1937 * key index as a hint to locate the node in the key
1938 * mapping table. If an entry is present at the key
1939 * index we return it; otherwise do a normal lookup and
1940 * update the mapping table if the station has a unicast
1941 * key assigned to it.
1942 */
1943 struct ieee80211_node *
1944 #ifdef IEEE80211_DEBUG_REFCNT
1945 ieee80211_find_rxnode_withkey_debug(struct ieee80211com *ic,
1946 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix,
1947 const char *func, int line)
1948 #else
1949 ieee80211_find_rxnode_withkey(struct ieee80211com *ic,
1950 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix)
1951 #endif
1952 {
1953 struct ieee80211_node_table *nt;
1954 struct ieee80211_node *ni;
1955
1956 nt = &ic->ic_sta;
1957 IEEE80211_NODE_LOCK(nt);
1958 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax)
1959 ni = nt->nt_keyixmap[keyix];
1960 else
1961 ni = NULL;
1962 if (ni == NULL) {
1963 ni = _find_rxnode(nt, wh);
1964 if (ni != NULL && nt->nt_keyixmap != NULL) {
1965 /*
1966 * If the station has a unicast key cache slot
1967 * assigned update the key->node mapping table.
1968 */
1969 keyix = ni->ni_ucastkey.wk_rxkeyix;
1970 /* XXX can keyixmap[keyix] != NULL? */
1971 if (keyix < nt->nt_keyixmax &&
1972 nt->nt_keyixmap[keyix] == NULL) {
1973 IEEE80211_DPRINTF(ni->ni_vap,
1974 IEEE80211_MSG_NODE,
1975 "%s: add key map entry %p<%s> refcnt %d\n",
1976 __func__, ni, ether_sprintf(ni->ni_macaddr),
1977 ieee80211_node_refcnt(ni)+1);
1978 nt->nt_keyixmap[keyix] = ieee80211_ref_node(ni);
1979 }
1980 }
1981 } else {
1982 if (IS_BCAST_PROBEREQ(wh))
1983 ni = NULL; /* spam bcast probe req to all vap's */
1984 else
1985 ieee80211_ref_node(ni);
1986 }
1987 IEEE80211_NODE_UNLOCK(nt);
1988
1989 return ni;
1990 }
1991 #undef IS_BCAST_PROBEREQ
1992 #undef IS_PROBEREQ
1993
1994 /*
1995 * Return a reference to the appropriate node for sending
1996 * a data frame. This handles node discovery in adhoc networks.
1997 */
1998 struct ieee80211_node *
1999 #ifdef IEEE80211_DEBUG_REFCNT
2000 ieee80211_find_txnode_debug(struct ieee80211vap *vap,
2001 const uint8_t macaddr[IEEE80211_ADDR_LEN],
2002 const char *func, int line)
2003 #else
2004 ieee80211_find_txnode(struct ieee80211vap *vap,
2005 const uint8_t macaddr[IEEE80211_ADDR_LEN])
2006 #endif
2007 {
2008 struct ieee80211_node_table *nt = &vap->iv_ic->ic_sta;
2009 struct ieee80211_node *ni;
2010
2011 /*
2012 * The destination address should be in the node table
2013 * unless this is a multicast/broadcast frame. We can
2014 * also optimize station mode operation, all frames go
2015 * to the bss node.
2016 */
2017 /* XXX can't hold lock across dup_bss 'cuz of recursive locking */
2018 IEEE80211_NODE_LOCK(nt);
2019 if (vap->iv_opmode == IEEE80211_M_STA ||
2020 vap->iv_opmode == IEEE80211_M_WDS ||
2021 IEEE80211_IS_MULTICAST(macaddr))
2022 ni = ieee80211_ref_node(vap->iv_bss);
2023 else
2024 ni = ieee80211_find_node_locked(nt, macaddr);
2025 IEEE80211_NODE_UNLOCK(nt);
2026
2027 if (ni == NULL) {
2028 if (vap->iv_opmode == IEEE80211_M_IBSS ||
2029 vap->iv_opmode == IEEE80211_M_AHDEMO) {
2030 /*
2031 * In adhoc mode cons up a node for the destination.
2032 * Note that we need an additional reference for the
2033 * caller to be consistent with
2034 * ieee80211_find_node_locked.
2035 */
2036 /*
2037 * XXX TODO: this doesn't fake up 11n state; we need
2038 * to find another way to get it upgraded.
2039 */
2040 ni = ieee80211_fakeup_adhoc_node(vap, macaddr);
2041 if (ni != NULL)
2042 (void) ieee80211_ref_node(ni);
2043 } else {
2044 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, macaddr,
2045 "no node, discard frame (%s)", __func__);
2046 vap->iv_stats.is_tx_nonode++;
2047 }
2048 }
2049 return ni;
2050 }
2051
2052 static void
2053 _ieee80211_free_node(struct ieee80211_node *ni)
2054 {
2055 struct ieee80211_node_table *nt = ni->ni_table;
2056
2057 /*
2058 * NB: careful about referencing the vap as it may be
2059 * gone if the last reference was held by a driver.
2060 * We know the com will always be present so it's safe
2061 * to use ni_ic below to reclaim resources.
2062 */
2063 #if 0
2064 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2065 "%s %p<%s> in %s table\n", __func__, ni,
2066 ether_sprintf(ni->ni_macaddr),
2067 nt != NULL ? nt->nt_name : "<gone>");
2068 #endif
2069 if (ni->ni_associd != 0) {
2070 struct ieee80211vap *vap = ni->ni_vap;
2071 if (vap->iv_aid_bitmap != NULL)
2072 IEEE80211_AID_CLR(vap, ni->ni_associd);
2073 }
2074 if (nt != NULL)
2075 ieee80211_del_node_nt(nt, ni);
2076 ni->ni_ic->ic_node_free(ni);
2077 }
2078
2079 /*
2080 * Clear any entry in the unicast key mapping table.
2081 */
2082 static int
2083 node_clear_keyixmap(struct ieee80211_node_table *nt, struct ieee80211_node *ni)
2084 {
2085 ieee80211_keyix keyix;
2086
2087 keyix = ni->ni_ucastkey.wk_rxkeyix;
2088 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax &&
2089 nt->nt_keyixmap[keyix] == ni) {
2090 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
2091 "%s: %p<%s> clear key map entry %u\n",
2092 __func__, ni, ether_sprintf(ni->ni_macaddr), keyix);
2093 nt->nt_keyixmap[keyix] = NULL;
2094 ieee80211_node_decref(ni);
2095 return 1;
2096 }
2097
2098 return 0;
2099 }
2100
2101 void
2102 #ifdef IEEE80211_DEBUG_REFCNT
2103 ieee80211_free_node_debug(struct ieee80211_node *ni, const char *func, int line)
2104 #else
2105 ieee80211_free_node(struct ieee80211_node *ni)
2106 #endif
2107 {
2108 struct ieee80211_node_table *nt = ni->ni_table;
2109
2110 #ifdef IEEE80211_DEBUG_REFCNT
2111 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
2112 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni,
2113 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1);
2114 #endif
2115 if (nt != NULL) {
2116 IEEE80211_NODE_LOCK(nt);
2117 if (ieee80211_node_dectestref(ni)) {
2118 /*
2119 * Last reference, reclaim state.
2120 */
2121 _ieee80211_free_node(ni);
2122 } else if (ieee80211_node_refcnt(ni) == 1)
2123 if (node_clear_keyixmap(nt, ni))
2124 _ieee80211_free_node(ni);
2125 IEEE80211_NODE_UNLOCK(nt);
2126 } else {
2127 if (ieee80211_node_dectestref(ni))
2128 _ieee80211_free_node(ni);
2129 }
2130 }
2131
2132 /*
2133 * Reclaim a unicast key and clear any key cache state.
2134 */
2135 int
2136 ieee80211_node_delucastkey(struct ieee80211_node *ni)
2137 {
2138 struct ieee80211com *ic = ni->ni_ic;
2139 struct ieee80211_node_table *nt = &ic->ic_sta;
2140 struct ieee80211_node *nikey;
2141 ieee80211_keyix keyix;
2142 int isowned, status;
2143
2144 /*
2145 * NB: We must beware of LOR here; deleting the key
2146 * can cause the crypto layer to block traffic updates
2147 * which can generate a LOR against the node table lock;
2148 * grab it here and stash the key index for our use below.
2149 *
2150 * Must also beware of recursion on the node table lock.
2151 * When called from node_cleanup we may already have
2152 * the node table lock held. Unfortunately there's no
2153 * way to separate out this path so we must do this
2154 * conditionally.
2155 */
2156 isowned = IEEE80211_NODE_IS_LOCKED(nt);
2157 if (!isowned)
2158 IEEE80211_NODE_LOCK(nt);
2159 nikey = NULL;
2160 status = 1; /* NB: success */
2161 if (ni->ni_ucastkey.wk_keyix != IEEE80211_KEYIX_NONE) {
2162 keyix = ni->ni_ucastkey.wk_rxkeyix;
2163 status = ieee80211_crypto_delkey(ni->ni_vap, &ni->ni_ucastkey);
2164 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) {
2165 nikey = nt->nt_keyixmap[keyix];
2166 nt->nt_keyixmap[keyix] = NULL;
2167 }
2168 }
2169 if (!isowned)
2170 IEEE80211_NODE_UNLOCK(nt);
2171
2172 if (nikey != NULL) {
2173 KASSERT(nikey == ni,
2174 ("key map out of sync, ni %p nikey %p", ni, nikey));
2175 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
2176 "%s: delete key map entry %p<%s> refcnt %d\n",
2177 __func__, ni, ether_sprintf(ni->ni_macaddr),
2178 ieee80211_node_refcnt(ni)-1);
2179 ieee80211_free_node(ni);
2180 }
2181 return status;
2182 }
2183
2184 /*
2185 * Reclaim a node. If this is the last reference count then
2186 * do the normal free work. Otherwise remove it from the node
2187 * table and mark it gone by clearing the back-reference.
2188 */
2189 static void
2190 node_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni)
2191 {
2192
2193 IEEE80211_NODE_LOCK_ASSERT(nt);
2194
2195 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
2196 "%s: remove %p<%s> from %s table, refcnt %d\n",
2197 __func__, ni, ether_sprintf(ni->ni_macaddr),
2198 nt->nt_name, ieee80211_node_refcnt(ni)-1);
2199 /*
2200 * Clear any entry in the unicast key mapping table.
2201 * We need to do it here so rx lookups don't find it
2202 * in the mapping table even if it's not in the hash
2203 * table. We cannot depend on the mapping table entry
2204 * being cleared because the node may not be free'd.
2205 */
2206 (void)node_clear_keyixmap(nt, ni);
2207 if (!ieee80211_node_dectestref(ni)) {
2208 /*
2209 * Other references are present, just remove the
2210 * node from the table so it cannot be found. When
2211 * the references are dropped storage will be
2212 * reclaimed.
2213 */
2214 ieee80211_del_node_nt(nt, ni);
2215 } else
2216 _ieee80211_free_node(ni);
2217 }
2218
2219 /*
2220 * Node table support.
2221 */
2222
2223 static void
2224 ieee80211_node_table_init(struct ieee80211com *ic,
2225 struct ieee80211_node_table *nt,
2226 const char *name, int inact, int keyixmax)
2227 {
2228
2229 nt->nt_ic = ic;
2230 IEEE80211_NODE_LOCK_INIT(nt, ic->ic_name);
2231 TAILQ_INIT(&nt->nt_node);
2232 nt->nt_count = 0;
2233 nt->nt_name = name;
2234 nt->nt_inact_init = inact;
2235 nt->nt_keyixmax = keyixmax;
2236 if (nt->nt_keyixmax > 0) {
2237 nt->nt_keyixmap = (struct ieee80211_node **) IEEE80211_MALLOC(
2238 keyixmax * sizeof(struct ieee80211_node *),
2239 M_80211_NODE,
2240 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
2241 if (nt->nt_keyixmap == NULL)
2242 ic_printf(ic,
2243 "Cannot allocate key index map with %u entries\n",
2244 keyixmax);
2245 } else
2246 nt->nt_keyixmap = NULL;
2247 }
2248
2249 static void
2250 ieee80211_node_table_reset(struct ieee80211_node_table *nt,
2251 struct ieee80211vap *match)
2252 {
2253 struct ieee80211_node *ni, *next;
2254
2255 IEEE80211_NODE_LOCK(nt);
2256 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) {
2257 if (match != NULL && ni->ni_vap != match)
2258 continue;
2259 /* XXX can this happen? if so need's work */
2260 if (ni->ni_associd != 0) {
2261 struct ieee80211vap *vap = ni->ni_vap;
2262
2263 if (vap->iv_auth->ia_node_leave != NULL)
2264 vap->iv_auth->ia_node_leave(ni);
2265 if (vap->iv_aid_bitmap != NULL)
2266 IEEE80211_AID_CLR(vap, ni->ni_associd);
2267 }
2268 ni->ni_wdsvap = NULL; /* clear reference */
2269 node_reclaim(nt, ni);
2270 }
2271 if (match != NULL && match->iv_opmode == IEEE80211_M_WDS) {
2272 /*
2273 * Make a separate pass to clear references to this vap
2274 * held by DWDS entries. They will not be matched above
2275 * because ni_vap will point to the ap vap but we still
2276 * need to clear ni_wdsvap when the WDS vap is destroyed
2277 * and/or reset.
2278 */
2279 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next)
2280 if (ni->ni_wdsvap == match)
2281 ni->ni_wdsvap = NULL;
2282 }
2283 IEEE80211_NODE_UNLOCK(nt);
2284 }
2285
2286 static void
2287 ieee80211_node_table_cleanup(struct ieee80211_node_table *nt)
2288 {
2289 ieee80211_node_table_reset(nt, NULL);
2290 if (nt->nt_keyixmap != NULL) {
2291 #ifdef DIAGNOSTIC
2292 /* XXX verify all entries are NULL */
2293 int i;
2294 for (i = 0; i < nt->nt_keyixmax; i++)
2295 if (nt->nt_keyixmap[i] != NULL)
2296 printf("%s: %s[%u] still active\n", __func__,
2297 nt->nt_name, i);
2298 #endif
2299 IEEE80211_FREE(nt->nt_keyixmap, M_80211_NODE);
2300 nt->nt_keyixmap = NULL;
2301 }
2302 IEEE80211_NODE_LOCK_DESTROY(nt);
2303 }
2304
2305 static void
2306 timeout_stations(void *arg __unused, struct ieee80211_node *ni)
2307 {
2308 struct ieee80211com *ic = ni->ni_ic;
2309 struct ieee80211vap *vap = ni->ni_vap;
2310
2311 /*
2312 * Only process stations when in RUN state. This
2313 * insures, for example, that we don't timeout an
2314 * inactive station during CAC. Note that CSA state
2315 * is actually handled in ieee80211_node_timeout as
2316 * it applies to more than timeout processing.
2317 */
2318 if (vap->iv_state != IEEE80211_S_RUN)
2319 return;
2320 /*
2321 * Ignore entries for which have yet to receive an
2322 * authentication frame. These are transient and
2323 * will be reclaimed when the last reference to them
2324 * goes away (when frame xmits complete).
2325 */
2326 if ((vap->iv_opmode == IEEE80211_M_HOSTAP ||
2327 vap->iv_opmode == IEEE80211_M_STA) &&
2328 (ni->ni_flags & IEEE80211_NODE_AREF) == 0)
2329 return;
2330 /*
2331 * Free fragment if not needed anymore
2332 * (last fragment older than 1s).
2333 * XXX doesn't belong here, move to node_age
2334 */
2335 if (ni->ni_rxfrag[0] != NULL &&
2336 ticks > ni->ni_rxfragstamp + hz) {
2337 m_freem(ni->ni_rxfrag[0]);
2338 ni->ni_rxfrag[0] = NULL;
2339 }
2340 if (ni->ni_inact > 0) {
2341 ni->ni_inact--;
2342 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni,
2343 "%s: inact %u inact_reload %u nrates %u",
2344 __func__, ni->ni_inact, ni->ni_inact_reload,
2345 ni->ni_rates.rs_nrates);
2346 }
2347 /*
2348 * Special case ourself; we may be idle for extended periods
2349 * of time and regardless reclaiming our state is wrong.
2350 * XXX run ic_node_age
2351 */
2352 /* XXX before inact decrement? */
2353 if (ni == vap->iv_bss)
2354 return;
2355 if (ni->ni_associd != 0 ||
2356 (vap->iv_opmode == IEEE80211_M_IBSS ||
2357 vap->iv_opmode == IEEE80211_M_AHDEMO)) {
2358 /*
2359 * Age/drain resources held by the station.
2360 */
2361 ic->ic_node_age(ni);
2362 /*
2363 * Probe the station before time it out. We
2364 * send a null data frame which may not be
2365 * universally supported by drivers (need it
2366 * for ps-poll support so it should be...).
2367 *
2368 * XXX don't probe the station unless we've
2369 * received a frame from them (and have
2370 * some idea of the rates they are capable
2371 * of); this will get fixed more properly
2372 * soon with better handling of the rate set.
2373 */
2374 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) &&
2375 (0 < ni->ni_inact &&
2376 ni->ni_inact <= vap->iv_inact_probe) &&
2377 ni->ni_rates.rs_nrates != 0) {
2378 IEEE80211_NOTE(vap,
2379 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE,
2380 ni, "%s",
2381 "probe station due to inactivity");
2382 /*
2383 * Grab a reference so the node cannot
2384 * be reclaimed before we send the frame.
2385 * ieee80211_send_nulldata understands
2386 * we've done this and reclaims the
2387 * ref for us as needed.
2388 */
2389 /* XXX fix this (not required anymore). */
2390 ieee80211_ref_node(ni);
2391 /* XXX useless */
2392 ieee80211_send_nulldata(ni);
2393 /* XXX stat? */
2394 return;
2395 }
2396 }
2397 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) &&
2398 ni->ni_inact <= 0) {
2399 IEEE80211_NOTE(vap,
2400 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, ni,
2401 "station timed out due to inactivity "
2402 "(refcnt %u)", ieee80211_node_refcnt(ni));
2403 /*
2404 * Send a deauthenticate frame and drop the station.
2405 * This is somewhat complicated due to reference counts
2406 * and locking. At this point a station will typically
2407 * have a reference count of 2. ieee80211_node_leave
2408 * will do a "free" of the node which will drop the
2409 * reference count. But in the meantime a reference
2410 * wil be held by the deauth frame. The actual reclaim
2411 * of the node will happen either after the tx is
2412 * completed or by ieee80211_node_leave.
2413 */
2414 if (ni->ni_associd != 0) {
2415 IEEE80211_SEND_MGMT(ni,
2416 IEEE80211_FC0_SUBTYPE_DEAUTH,
2417 IEEE80211_REASON_AUTH_EXPIRE);
2418 }
2419 ieee80211_node_leave(ni);
2420 vap->iv_stats.is_node_timeout++;
2421 }
2422 }
2423
2424 /*
2425 * Timeout inactive stations and do related housekeeping.
2426 */
2427 static void
2428 ieee80211_timeout_stations(struct ieee80211com *ic)
2429 {
2430 struct ieee80211_node_table *nt = &ic->ic_sta;
2431
2432 ieee80211_iterate_nodes(nt, timeout_stations, NULL);
2433 }
2434
2435 /*
2436 * Aggressively reclaim resources. This should be used
2437 * only in a critical situation to reclaim mbuf resources.
2438 */
2439 void
2440 ieee80211_drain(struct ieee80211com *ic)
2441 {
2442 struct ieee80211_node_table *nt = &ic->ic_sta;
2443 struct ieee80211vap *vap;
2444 struct ieee80211_node *ni;
2445
2446 IEEE80211_NODE_LOCK(nt);
2447 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) {
2448 /*
2449 * Ignore entries for which have yet to receive an
2450 * authentication frame. These are transient and
2451 * will be reclaimed when the last reference to them
2452 * goes away (when frame xmits complete).
2453 */
2454 vap = ni->ni_vap;
2455 /*
2456 * Only process stations when in RUN state. This
2457 * insures, for example, that we don't timeout an
2458 * inactive station during CAC. Note that CSA state
2459 * is actually handled in ieee80211_node_timeout as
2460 * it applies to more than timeout processing.
2461 */
2462 if (vap->iv_state != IEEE80211_S_RUN)
2463 continue;
2464 /* XXX can vap be NULL? */
2465 if ((vap->iv_opmode == IEEE80211_M_HOSTAP ||
2466 vap->iv_opmode == IEEE80211_M_STA) &&
2467 (ni->ni_flags & IEEE80211_NODE_AREF) == 0)
2468 continue;
2469 /*
2470 * Free fragments.
2471 * XXX doesn't belong here, move to node_drain
2472 */
2473 if (ni->ni_rxfrag[0] != NULL) {
2474 m_freem(ni->ni_rxfrag[0]);
2475 ni->ni_rxfrag[0] = NULL;
2476 }
2477 /*
2478 * Drain resources held by the station.
2479 */
2480 ic->ic_node_drain(ni);
2481 }
2482 IEEE80211_NODE_UNLOCK(nt);
2483 }
2484
2485 /*
2486 * Per-ieee80211com inactivity timer callback.
2487 */
2488 void
2489 ieee80211_node_timeout(void *arg)
2490 {
2491 struct ieee80211com *ic = arg;
2492
2493 /*
2494 * Defer timeout processing if a channel switch is pending.
2495 * We typically need to be mute so not doing things that
2496 * might generate frames is good to handle in one place.
2497 * Suppressing the station timeout processing may extend the
2498 * lifetime of inactive stations (by not decrementing their
2499 * idle counters) but this should be ok unless the CSA is
2500 * active for an unusually long time.
2501 */
2502 if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) {
2503 ieee80211_scan_timeout(ic);
2504 ieee80211_timeout_stations(ic);
2505 ieee80211_ageq_age(&ic->ic_stageq, IEEE80211_INACT_WAIT);
2506
2507 IEEE80211_LOCK(ic);
2508 ieee80211_erp_timeout(ic);
2509 ieee80211_ht_timeout(ic);
2510 ieee80211_vht_timeout(ic);
2511 IEEE80211_UNLOCK(ic);
2512 }
2513 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz,
2514 ieee80211_node_timeout, ic);
2515 }
2516
2517 /*
2518 * The same as ieee80211_iterate_nodes(), but for one vap only.
2519 */
2520 int
2521 ieee80211_iterate_nodes_vap(struct ieee80211_node_table *nt,
2522 struct ieee80211vap *vap, ieee80211_iter_func *f, void *arg)
2523 {
2524 struct ieee80211_node **ni_arr;
2525 struct ieee80211_node *ni;
2526 size_t size;
2527 int count, i;
2528
2529 /*
2530 * Iterate over the node table and save an array of ref'ed nodes.
2531 *
2532 * This is separated out from calling the actual node function so that
2533 * no LORs will occur.
2534 */
2535 IEEE80211_NODE_LOCK(nt);
2536 count = nt->nt_count;
2537 size = count * sizeof(struct ieee80211_node *);
2538 ni_arr = (struct ieee80211_node **) IEEE80211_MALLOC(size, M_80211_NODE,
2539 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
2540 if (ni_arr == NULL) {
2541 IEEE80211_NODE_UNLOCK(nt);
2542 return (ENOMEM);
2543 }
2544
2545 i = 0;
2546 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) {
2547 if (vap != NULL && ni->ni_vap != vap)
2548 continue;
2549 KASSERT(i < count,
2550 ("node array overflow (vap %p, i %d, count %d)\n",
2551 vap, i, count));
2552 ni_arr[i] = ieee80211_ref_node(ni);
2553 i++;
2554 }
2555 IEEE80211_NODE_UNLOCK(nt);
2556
2557 for (i = 0; i < count; i++) {
2558 if (ni_arr[i] == NULL) /* end of the list */
2559 break;
2560 (*f)(arg, ni_arr[i]);
2561 /* ieee80211_free_node() locks by itself */
2562 ieee80211_free_node(ni_arr[i]);
2563 }
2564
2565 IEEE80211_FREE(ni_arr, M_80211_NODE);
2566
2567 return (0);
2568 }
2569
2570 /*
2571 * Just a wrapper, so we don't have to change every ieee80211_iterate_nodes()
2572 * reference in the source.
2573 */
2574 void
2575 ieee80211_iterate_nodes(struct ieee80211_node_table *nt,
2576 ieee80211_iter_func *f, void *arg)
2577 {
2578 /* XXX no way to pass error to the caller. */
2579 (void) ieee80211_iterate_nodes_vap(nt, NULL, f, arg);
2580 }
2581
2582 void
2583 ieee80211_dump_node(struct ieee80211_node_table *nt, struct ieee80211_node *ni)
2584 {
2585 printf("0x%p: mac %s refcnt %d\n", ni,
2586 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni));
2587 printf("\tauthmode %u flags 0x%x\n",
2588 ni->ni_authmode, ni->ni_flags);
2589 printf("\tassocid 0x%x txpower %u vlan %u\n",
2590 ni->ni_associd, ni->ni_txpower, ni->ni_vlan);
2591 printf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n",
2592 ni->ni_txseqs[IEEE80211_NONQOS_TID],
2593 ni->ni_rxseqs[IEEE80211_NONQOS_TID] >> IEEE80211_SEQ_SEQ_SHIFT,
2594 ni->ni_rxseqs[IEEE80211_NONQOS_TID] & IEEE80211_SEQ_FRAG_MASK,
2595 ni->ni_rxfragstamp);
2596 printf("\trssi %d noise %d intval %u capinfo 0x%x\n",
2597 node_getrssi(ni), ni->ni_noise,
2598 ni->ni_intval, ni->ni_capinfo);
2599 printf("\tbssid %s essid \"%.*s\" channel %u:0x%x\n",
2600 ether_sprintf(ni->ni_bssid),
2601 ni->ni_esslen, ni->ni_essid,
2602 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags);
2603 printf("\tinact %u inact_reload %u txrate %u\n",
2604 ni->ni_inact, ni->ni_inact_reload, ni->ni_txrate);
2605 printf("\thtcap %x htparam %x htctlchan %u ht2ndchan %u\n",
2606 ni->ni_htcap, ni->ni_htparam,
2607 ni->ni_htctlchan, ni->ni_ht2ndchan);
2608 printf("\thtopmode %x htstbc %x htchw %u\n",
2609 ni->ni_htopmode, ni->ni_htstbc, ni->ni_chw);
2610 printf("\tvhtcap %x freq1 %d freq2 %d vhtbasicmcs %x\n",
2611 ni->ni_vhtcap, (int) ni->ni_vht_chan1, (int) ni->ni_vht_chan2,
2612 (int) ni->ni_vht_basicmcs);
2613 /* XXX VHT state */
2614 }
2615
2616 void
2617 ieee80211_dump_nodes(struct ieee80211_node_table *nt)
2618 {
2619 ieee80211_iterate_nodes(nt,
2620 (ieee80211_iter_func *) ieee80211_dump_node, nt);
2621 }
2622
2623 static void
2624 ieee80211_notify_erp_locked(struct ieee80211com *ic)
2625 {
2626 struct ieee80211vap *vap;
2627
2628 IEEE80211_LOCK_ASSERT(ic);
2629
2630 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
2631 if (vap->iv_opmode == IEEE80211_M_HOSTAP)
2632 ieee80211_beacon_notify(vap, IEEE80211_BEACON_ERP);
2633 }
2634
2635 void
2636 ieee80211_notify_erp(struct ieee80211com *ic)
2637 {
2638 IEEE80211_LOCK(ic);
2639 ieee80211_notify_erp_locked(ic);
2640 IEEE80211_UNLOCK(ic);
2641 }
2642
2643 /*
2644 * Handle a station joining an 11g network.
2645 */
2646 static void
2647 ieee80211_node_join_11g(struct ieee80211_node *ni)
2648 {
2649 struct ieee80211com *ic = ni->ni_ic;
2650
2651 IEEE80211_LOCK_ASSERT(ic);
2652
2653 /*
2654 * Station isn't capable of short slot time. Bump
2655 * the count of long slot time stations and disable
2656 * use of short slot time. Note that the actual switch
2657 * over to long slot time use may not occur until the
2658 * next beacon transmission (per sec. 7.3.1.4 of 11g).
2659 */
2660 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) {
2661 ic->ic_longslotsta++;
2662 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2663 "station needs long slot time, count %d",
2664 ic->ic_longslotsta);
2665 /* XXX vap's w/ conflicting needs won't work */
2666 if (!IEEE80211_IS_CHAN_108G(ic->ic_bsschan)) {
2667 /*
2668 * Don't force slot time when switched to turbo
2669 * mode as non-ERP stations won't be present; this
2670 * need only be done when on the normal G channel.
2671 */
2672 ieee80211_set_shortslottime(ic, 0);
2673 }
2674 }
2675 /*
2676 * If the new station is not an ERP station
2677 * then bump the counter and enable protection
2678 * if configured.
2679 */
2680 if (!ieee80211_iserp_rateset(&ni->ni_rates)) {
2681 ic->ic_nonerpsta++;
2682 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2683 "station is !ERP, %d non-ERP stations associated",
2684 ic->ic_nonerpsta);
2685 /*
2686 * If station does not support short preamble
2687 * then we must enable use of Barker preamble.
2688 */
2689 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) {
2690 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2691 "%s", "station needs long preamble");
2692 ic->ic_flags |= IEEE80211_F_USEBARKER;
2693 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE;
2694 }
2695 /*
2696 * If protection is configured and this is the first
2697 * indication we should use protection, enable it.
2698 */
2699 if (ic->ic_protmode != IEEE80211_PROT_NONE &&
2700 ic->ic_nonerpsta == 1 &&
2701 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) {
2702 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC,
2703 "%s: enable use of protection\n", __func__);
2704 ic->ic_flags |= IEEE80211_F_USEPROT;
2705 ieee80211_notify_erp_locked(ic);
2706 }
2707 } else
2708 ni->ni_flags |= IEEE80211_NODE_ERP;
2709 }
2710
2711 void
2712 ieee80211_node_join(struct ieee80211_node *ni, int resp)
2713 {
2714 struct ieee80211com *ic = ni->ni_ic;
2715 struct ieee80211vap *vap = ni->ni_vap;
2716 int newassoc;
2717
2718 if (ni->ni_associd == 0) {
2719 uint16_t aid;
2720
2721 KASSERT(vap->iv_aid_bitmap != NULL, ("no aid bitmap"));
2722 /*
2723 * It would be good to search the bitmap
2724 * more efficiently, but this will do for now.
2725 */
2726 for (aid = 1; aid < vap->iv_max_aid; aid++) {
2727 if (!IEEE80211_AID_ISSET(vap, aid))
2728 break;
2729 }
2730 if (aid >= vap->iv_max_aid) {
2731 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_TOOMANY);
2732 ieee80211_node_leave(ni);
2733 return;
2734 }
2735 ni->ni_associd = aid | 0xc000;
2736 ni->ni_jointime = time_uptime;
2737 IEEE80211_LOCK(ic);
2738 IEEE80211_AID_SET(vap, ni->ni_associd);
2739 vap->iv_sta_assoc++;
2740 ic->ic_sta_assoc++;
2741
2742 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan))
2743 ieee80211_ht_node_join(ni);
2744 if (IEEE80211_IS_CHAN_VHT(ic->ic_bsschan))
2745 ieee80211_vht_node_join(ni);
2746 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) &&
2747 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan))
2748 ieee80211_node_join_11g(ni);
2749 IEEE80211_UNLOCK(ic);
2750
2751 newassoc = 1;
2752 } else
2753 newassoc = 0;
2754
2755 /*
2756 * XXX VHT - should log VHT channel width, etc
2757 */
2758 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni,
2759 "station associated at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s",
2760 IEEE80211_NODE_AID(ni),
2761 ic->ic_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long",
2762 ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long",
2763 ic->ic_flags & IEEE80211_F_USEPROT ? ", protection" : "",
2764 ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "",
2765 /* XXX update for VHT string */
2766 ni->ni_flags & IEEE80211_NODE_HT ?
2767 (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "",
2768 ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "",
2769 ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" :
2770 ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "",
2771 ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "",
2772 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ?
2773 ", fast-frames" : "",
2774 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ?
2775 ", turbo" : ""
2776 );
2777
2778 ieee80211_node_setuptxparms(ni);
2779 ieee80211_ratectl_node_init(ni);
2780 /* give driver a chance to setup state like ni_txrate */
2781 if (ic->ic_newassoc != NULL)
2782 ic->ic_newassoc(ni, newassoc);
2783 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_SUCCESS);
2784 /* tell the authenticator about new station */
2785 if (vap->iv_auth->ia_node_join != NULL)
2786 vap->iv_auth->ia_node_join(ni);
2787 ieee80211_notify_node_join(ni,
2788 resp == IEEE80211_FC0_SUBTYPE_ASSOC_RESP);
2789 }
2790
2791 static void
2792 disable_protection(struct ieee80211com *ic)
2793 {
2794 KASSERT(ic->ic_nonerpsta == 0 &&
2795 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0,
2796 ("%d non ERP stations, flags 0x%x", ic->ic_nonerpsta,
2797 ic->ic_flags_ext));
2798
2799 ic->ic_flags &= ~IEEE80211_F_USEPROT;
2800 /* XXX verify mode? */
2801 if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) {
2802 ic->ic_flags |= IEEE80211_F_SHPREAMBLE;
2803 ic->ic_flags &= ~IEEE80211_F_USEBARKER;
2804 }
2805 ieee80211_notify_erp_locked(ic);
2806 }
2807
2808 /*
2809 * Handle a station leaving an 11g network.
2810 */
2811 static void
2812 ieee80211_node_leave_11g(struct ieee80211_node *ni)
2813 {
2814 struct ieee80211com *ic = ni->ni_ic;
2815
2816 IEEE80211_LOCK_ASSERT(ic);
2817
2818 KASSERT(IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan),
2819 ("not in 11g, bss %u:0x%x", ic->ic_bsschan->ic_freq,
2820 ic->ic_bsschan->ic_flags));
2821
2822 /*
2823 * If a long slot station do the slot time bookkeeping.
2824 */
2825 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) {
2826 KASSERT(ic->ic_longslotsta > 0,
2827 ("bogus long slot station count %d", ic->ic_longslotsta));
2828 ic->ic_longslotsta--;
2829 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2830 "long slot time station leaves, count now %d",
2831 ic->ic_longslotsta);
2832 if (ic->ic_longslotsta == 0) {
2833 /*
2834 * Re-enable use of short slot time if supported
2835 * and not operating in IBSS mode (per spec).
2836 */
2837 if ((ic->ic_caps & IEEE80211_C_SHSLOT) &&
2838 ic->ic_opmode != IEEE80211_M_IBSS) {
2839 IEEE80211_DPRINTF(ni->ni_vap,
2840 IEEE80211_MSG_ASSOC,
2841 "%s: re-enable use of short slot time\n",
2842 __func__);
2843 ieee80211_set_shortslottime(ic, 1);
2844 }
2845 }
2846 }
2847 /*
2848 * If a non-ERP station do the protection-related bookkeeping.
2849 */
2850 if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) {
2851 KASSERT(ic->ic_nonerpsta > 0,
2852 ("bogus non-ERP station count %d", ic->ic_nonerpsta));
2853 ic->ic_nonerpsta--;
2854 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2855 "non-ERP station leaves, count now %d%s", ic->ic_nonerpsta,
2856 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) ?
2857 " (non-ERP sta present)" : "");
2858 if (ic->ic_nonerpsta == 0 &&
2859 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) {
2860 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC,
2861 "%s: disable use of protection\n", __func__);
2862 disable_protection(ic);
2863 }
2864 }
2865 }
2866
2867 /*
2868 * Time out presence of an overlapping bss with non-ERP
2869 * stations. When operating in hostap mode we listen for
2870 * beacons from other stations and if we identify a non-ERP
2871 * station is present we enable protection. To identify
2872 * when all non-ERP stations are gone we time out this
2873 * condition.
2874 */
2875 static void
2876 ieee80211_erp_timeout(struct ieee80211com *ic)
2877 {
2878
2879 IEEE80211_LOCK_ASSERT(ic);
2880
2881 if ((ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) &&
2882 ieee80211_time_after(ticks, ic->ic_lastnonerp + IEEE80211_NONERP_PRESENT_AGE)) {
2883 #if 0
2884 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni,
2885 "%s", "age out non-ERP sta present on channel");
2886 #endif
2887 ic->ic_flags_ext &= ~IEEE80211_FEXT_NONERP_PR;
2888 if (ic->ic_nonerpsta == 0)
2889 disable_protection(ic);
2890 }
2891 }
2892
2893 /*
2894 * Handle bookkeeping for station deauthentication/disassociation
2895 * when operating as an ap.
2896 */
2897 void
2898 ieee80211_node_leave(struct ieee80211_node *ni)
2899 {
2900 struct ieee80211com *ic = ni->ni_ic;
2901 struct ieee80211vap *vap = ni->ni_vap;
2902 struct ieee80211_node_table *nt = ni->ni_table;
2903
2904 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni,
2905 "station with aid %d leaves", IEEE80211_NODE_AID(ni));
2906
2907 KASSERT(vap->iv_opmode != IEEE80211_M_STA,
2908 ("unexpected operating mode %u", vap->iv_opmode));
2909 /*
2910 * If node wasn't previously associated all
2911 * we need to do is reclaim the reference.
2912 */
2913 /* XXX ibss mode bypasses 11g and notification */
2914 if (ni->ni_associd == 0)
2915 goto done;
2916 /*
2917 * Tell the authenticator the station is leaving.
2918 * Note that we must do this before yanking the
2919 * association id as the authenticator uses the
2920 * associd to locate it's state block.
2921 */
2922 if (vap->iv_auth->ia_node_leave != NULL)
2923 vap->iv_auth->ia_node_leave(ni);
2924
2925 IEEE80211_LOCK(ic);
2926 IEEE80211_AID_CLR(vap, ni->ni_associd);
2927 vap->iv_sta_assoc--;
2928 ic->ic_sta_assoc--;
2929
2930 if (IEEE80211_IS_CHAN_VHT(ic->ic_bsschan))
2931 ieee80211_vht_node_leave(ni);
2932 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan))
2933 ieee80211_ht_node_leave(ni);
2934 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) &&
2935 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan))
2936 ieee80211_node_leave_11g(ni);
2937 IEEE80211_UNLOCK(ic);
2938 /*
2939 * Cleanup station state. In particular clear various
2940 * state that might otherwise be reused if the node
2941 * is reused before the reference count goes to zero
2942 * (and memory is reclaimed).
2943 */
2944 ieee80211_sta_leave(ni);
2945 done:
2946 /*
2947 * Remove the node from any table it's recorded in and
2948 * drop the caller's reference. Removal from the table
2949 * is important to insure the node is not reprocessed
2950 * for inactivity.
2951 */
2952 if (nt != NULL) {
2953 IEEE80211_NODE_LOCK(nt);
2954 node_reclaim(nt, ni);
2955 IEEE80211_NODE_UNLOCK(nt);
2956 } else
2957 ieee80211_free_node(ni);
2958 }
2959
2960 struct rssiinfo {
2961 int rssi_samples;
2962 uint32_t rssi_total;
2963 };
2964
2965 static void
2966 get_hostap_rssi(void *arg, struct ieee80211_node *ni)
2967 {
2968 struct rssiinfo *info = arg;
2969 struct ieee80211vap *vap = ni->ni_vap;
2970 int8_t rssi;
2971
2972 /* only associated stations */
2973 if (ni->ni_associd == 0)
2974 return;
2975 rssi = vap->iv_ic->ic_node_getrssi(ni);
2976 if (rssi != 0) {
2977 info->rssi_samples++;
2978 info->rssi_total += rssi;
2979 }
2980 }
2981
2982 static void
2983 get_adhoc_rssi(void *arg, struct ieee80211_node *ni)
2984 {
2985 struct rssiinfo *info = arg;
2986 struct ieee80211vap *vap = ni->ni_vap;
2987 int8_t rssi;
2988
2989 /* only neighbors */
2990 /* XXX check bssid */
2991 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0)
2992 return;
2993 rssi = vap->iv_ic->ic_node_getrssi(ni);
2994 if (rssi != 0) {
2995 info->rssi_samples++;
2996 info->rssi_total += rssi;
2997 }
2998 }
2999
3000 #ifdef IEEE80211_SUPPORT_MESH
3001 static void
3002 get_mesh_rssi(void *arg, struct ieee80211_node *ni)
3003 {
3004 struct rssiinfo *info = arg;
3005 struct ieee80211vap *vap = ni->ni_vap;
3006 int8_t rssi;
3007
3008 /* only neighbors that peered successfully */
3009 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED)
3010 return;
3011 rssi = vap->iv_ic->ic_node_getrssi(ni);
3012 if (rssi != 0) {
3013 info->rssi_samples++;
3014 info->rssi_total += rssi;
3015 }
3016 }
3017 #endif /* IEEE80211_SUPPORT_MESH */
3018
3019 int8_t
3020 ieee80211_getrssi(struct ieee80211vap *vap)
3021 {
3022 #define NZ(x) ((x) == 0 ? 1 : (x))
3023 struct ieee80211com *ic = vap->iv_ic;
3024 struct rssiinfo info;
3025
3026 info.rssi_total = 0;
3027 info.rssi_samples = 0;
3028 switch (vap->iv_opmode) {
3029 case IEEE80211_M_IBSS: /* average of all ibss neighbors */
3030 case IEEE80211_M_AHDEMO: /* average of all neighbors */
3031 ieee80211_iterate_nodes_vap(&ic->ic_sta, vap, get_adhoc_rssi,
3032 &info);
3033 break;
3034 case IEEE80211_M_HOSTAP: /* average of all associated stations */
3035 ieee80211_iterate_nodes_vap(&ic->ic_sta, vap, get_hostap_rssi,
3036 &info);
3037 break;
3038 #ifdef IEEE80211_SUPPORT_MESH
3039 case IEEE80211_M_MBSS: /* average of all mesh neighbors */
3040 ieee80211_iterate_nodes_vap(&ic->ic_sta, vap, get_mesh_rssi,
3041 &info);
3042 break;
3043 #endif
3044 case IEEE80211_M_MONITOR: /* XXX */
3045 case IEEE80211_M_STA: /* use stats from associated ap */
3046 default:
3047 if (vap->iv_bss != NULL)
3048 info.rssi_total = ic->ic_node_getrssi(vap->iv_bss);
3049 info.rssi_samples = 1;
3050 break;
3051 }
3052 return info.rssi_total / NZ(info.rssi_samples);
3053 #undef NZ
3054 }
3055
3056 void
3057 ieee80211_getsignal(struct ieee80211vap *vap, int8_t *rssi, int8_t *noise)
3058 {
3059
3060 if (vap->iv_bss == NULL) /* NB: shouldn't happen */
3061 return;
3062 vap->iv_ic->ic_node_getsignal(vap->iv_bss, rssi, noise);
3063 /* for non-station mode return avg'd rssi accounting */
3064 if (vap->iv_opmode != IEEE80211_M_STA)
3065 *rssi = ieee80211_getrssi(vap);
3066 }
Cache object: 7684640792dc1b509d8a2fecfd1a41a3
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