1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
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 #include "opt_wlan.h"
31
32 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/mbuf.h>
35 #include <sys/malloc.h>
36 #include <sys/kernel.h>
37
38 #include <sys/socket.h>
39
40 #include <net/if.h>
41 #include <net/if_var.h>
42 #include <net/if_media.h>
43 #include <net/ethernet.h>
44
45 #include <net80211/ieee80211_var.h>
46 #include <net80211/ieee80211_input.h>
47 #ifdef IEEE80211_SUPPORT_SUPERG
48 #include <net80211/ieee80211_superg.h>
49 #endif
50 #ifdef IEEE80211_SUPPORT_TDMA
51 #include <net80211/ieee80211_tdma.h>
52 #endif
53 #include <net80211/ieee80211_wds.h>
54 #include <net80211/ieee80211_mesh.h>
55 #include <net80211/ieee80211_ratectl.h>
56 #include <net80211/ieee80211_vht.h>
57
58 #include <net/bpf.h>
59
60 #ifdef IEEE80211_DEBUG_REFCNT
61 #define __debrefcnt_used
62 #else
63 #define __debrefcnt_used __unused
64 #endif
65
66 /*
67 * IEEE80211_NODE_HASHSIZE must be a power of 2.
68 */
69 CTASSERT((IEEE80211_NODE_HASHSIZE & (IEEE80211_NODE_HASHSIZE-1)) == 0);
70
71 /*
72 * Association id's are managed with a bit vector.
73 */
74 #define IEEE80211_AID_SET(_vap, b) \
75 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] |= \
76 (1 << (IEEE80211_AID(b) % 32)))
77 #define IEEE80211_AID_CLR(_vap, b) \
78 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] &= \
79 ~(1 << (IEEE80211_AID(b) % 32)))
80 #define IEEE80211_AID_ISSET(_vap, b) \
81 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] & (1 << (IEEE80211_AID(b) % 32)))
82
83 static int ieee80211_sta_join1(struct ieee80211_node *);
84
85 static struct ieee80211_node *ieee80211_alloc_node(
86 struct ieee80211_node_table *, struct ieee80211vap *,
87 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *, int);
88 static struct ieee80211_node *node_alloc(struct ieee80211vap *,
89 const uint8_t [IEEE80211_ADDR_LEN]);
90 static int node_init(struct ieee80211_node *);
91 static void node_cleanup(struct ieee80211_node *);
92 static void node_free(struct ieee80211_node *);
93 static void node_age(struct ieee80211_node *);
94 static int8_t node_getrssi(const struct ieee80211_node *);
95 static void node_getsignal(const struct ieee80211_node *, int8_t *, int8_t *);
96 static void node_getmimoinfo(const struct ieee80211_node *,
97 struct ieee80211_mimo_info *);
98
99 static void __ieee80211_free_node(struct ieee80211_node *);
100
101 static void node_reclaim(struct ieee80211_node_table *nt,
102 struct ieee80211_node *ni);
103 static void ieee80211_node_table_init(struct ieee80211com *ic,
104 struct ieee80211_node_table *nt, const char *name,
105 int inact, int keymaxix);
106 static void ieee80211_node_table_reset(struct ieee80211_node_table *,
107 struct ieee80211vap *);
108 static void ieee80211_node_table_cleanup(struct ieee80211_node_table *nt);
109 static void ieee80211_vap_erp_timeout(struct ieee80211vap *);
110
111 MALLOC_DEFINE(M_80211_NODE, "80211node", "802.11 node state");
112 MALLOC_DEFINE(M_80211_NODE_IE, "80211nodeie", "802.11 node ie");
113
114 void
ieee80211_node_attach(struct ieee80211com * ic)115 ieee80211_node_attach(struct ieee80211com *ic)
116 {
117 /* XXX really want maxlen enforced per-sta */
118 ieee80211_ageq_init(&ic->ic_stageq, ic->ic_max_keyix * 8,
119 "802.11 staging q");
120 ieee80211_node_table_init(ic, &ic->ic_sta, "station",
121 IEEE80211_INACT_INIT, ic->ic_max_keyix);
122 callout_init(&ic->ic_inact, 1);
123 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz,
124 ieee80211_node_timeout, ic);
125
126 ic->ic_node_alloc = node_alloc;
127 ic->ic_node_init = node_init;
128 ic->ic_node_free = node_free;
129 ic->ic_node_cleanup = node_cleanup;
130 ic->ic_node_age = node_age;
131 ic->ic_node_drain = node_age; /* NB: same as age */
132 ic->ic_node_getrssi = node_getrssi;
133 ic->ic_node_getsignal = node_getsignal;
134 ic->ic_node_getmimoinfo = node_getmimoinfo;
135
136 /*
137 * Set flags to be propagated to all vap's;
138 * these define default behaviour/configuration.
139 */
140 ic->ic_flags_ext |= IEEE80211_FEXT_INACT; /* inactivity processing */
141 }
142
143 void
ieee80211_node_detach(struct ieee80211com * ic)144 ieee80211_node_detach(struct ieee80211com *ic)
145 {
146
147 callout_drain(&ic->ic_inact);
148 ieee80211_node_table_cleanup(&ic->ic_sta);
149 ieee80211_ageq_drain(&ic->ic_stageq);
150 ieee80211_ageq_cleanup(&ic->ic_stageq);
151 }
152
153 void
ieee80211_node_vattach(struct ieee80211vap * vap)154 ieee80211_node_vattach(struct ieee80211vap *vap)
155 {
156 /* NB: driver can override */
157 vap->iv_max_aid = IEEE80211_AID_DEF;
158
159 /* default station inactivity timer settings */
160 vap->iv_inact_init = IEEE80211_INACT_INIT;
161 vap->iv_inact_auth = IEEE80211_INACT_AUTH;
162 vap->iv_inact_run = IEEE80211_INACT_RUN;
163 vap->iv_inact_probe = IEEE80211_INACT_PROBE;
164
165 IEEE80211_DPRINTF(vap, IEEE80211_MSG_INACT,
166 "%s: init %u auth %u run %u probe %u\n", __func__,
167 vap->iv_inact_init, vap->iv_inact_auth,
168 vap->iv_inact_run, vap->iv_inact_probe);
169 }
170
171 void
ieee80211_node_latevattach(struct ieee80211vap * vap)172 ieee80211_node_latevattach(struct ieee80211vap *vap)
173 {
174
175 /* XXX should ieee80211_vap_attach(), our only caller hold the lock? */
176 IEEE80211_UNLOCK_ASSERT(vap->iv_ic);
177
178 if (vap->iv_opmode == IEEE80211_M_HOSTAP) {
179 /* XXX should we allow max aid to be zero? */
180 if (vap->iv_max_aid < IEEE80211_AID_MIN) {
181 vap->iv_max_aid = IEEE80211_AID_MIN;
182 if_printf(vap->iv_ifp,
183 "WARNING: max aid too small, changed to %d\n",
184 vap->iv_max_aid);
185 }
186 vap->iv_aid_bitmap = (uint32_t *) IEEE80211_MALLOC(
187 howmany(vap->iv_max_aid, 32) * sizeof(uint32_t),
188 M_80211_NODE,
189 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
190 if (vap->iv_aid_bitmap == NULL) {
191 /* XXX no way to recover */
192 printf("%s: no memory for AID bitmap, max aid %d!\n",
193 __func__, vap->iv_max_aid);
194 vap->iv_max_aid = 0;
195 }
196 }
197
198 IEEE80211_LOCK(vap->iv_ic);
199 ieee80211_reset_bss(vap);
200 IEEE80211_UNLOCK(vap->iv_ic);
201
202 vap->iv_auth = ieee80211_authenticator_get(vap->iv_bss->ni_authmode);
203 }
204
205 void
ieee80211_node_vdetach(struct ieee80211vap * vap)206 ieee80211_node_vdetach(struct ieee80211vap *vap)
207 {
208 struct ieee80211com *ic = vap->iv_ic;
209
210 /* XXX should ieee80211_vap_detach(), our only caller hold the lock? */
211 IEEE80211_UNLOCK_ASSERT(vap->iv_ic);
212
213 ieee80211_node_table_reset(&ic->ic_sta, vap);
214 IEEE80211_LOCK(ic);
215 if (vap->iv_bss != NULL) {
216 ieee80211_free_node(vap->iv_bss);
217 vap->iv_update_bss(vap, NULL);
218 }
219 IEEE80211_UNLOCK(ic);
220 if (vap->iv_aid_bitmap != NULL) {
221 IEEE80211_FREE(vap->iv_aid_bitmap, M_80211_NODE);
222 vap->iv_aid_bitmap = NULL;
223 }
224 }
225
226 /*
227 * Port authorize/unauthorize interfaces for use by an authenticator.
228 */
229
230 void
ieee80211_node_authorize(struct ieee80211_node * ni)231 ieee80211_node_authorize(struct ieee80211_node *ni)
232 {
233 struct ieee80211vap *vap = ni->ni_vap;
234
235 ni->ni_flags |= IEEE80211_NODE_AUTH;
236 ni->ni_inact_reload = vap->iv_inact_run;
237 ni->ni_inact = ni->ni_inact_reload;
238
239 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni,
240 "%s: inact_reload %u", __func__, ni->ni_inact_reload);
241 }
242
243 void
ieee80211_node_unauthorize(struct ieee80211_node * ni)244 ieee80211_node_unauthorize(struct ieee80211_node *ni)
245 {
246 struct ieee80211vap *vap = ni->ni_vap;
247
248 ni->ni_flags &= ~IEEE80211_NODE_AUTH;
249 ni->ni_inact_reload = vap->iv_inact_auth;
250 if (ni->ni_inact > ni->ni_inact_reload)
251 ni->ni_inact = ni->ni_inact_reload;
252
253 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni,
254 "%s: inact_reload %u inact %u", __func__,
255 ni->ni_inact_reload, ni->ni_inact);
256 }
257
258 /*
259 * Fix tx parameters for a node according to ``association state''.
260 */
261 void
ieee80211_node_setuptxparms(struct ieee80211_node * ni)262 ieee80211_node_setuptxparms(struct ieee80211_node *ni)
263 {
264 struct ieee80211vap *vap = ni->ni_vap;
265 enum ieee80211_phymode mode;
266
267 if (ni->ni_flags & IEEE80211_NODE_VHT) {
268 if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan))
269 mode = IEEE80211_MODE_VHT_5GHZ;
270 else
271 mode = IEEE80211_MODE_VHT_2GHZ;
272 } else if (ni->ni_flags & IEEE80211_NODE_HT) {
273 if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan))
274 mode = IEEE80211_MODE_11NA;
275 else
276 mode = IEEE80211_MODE_11NG;
277 } else { /* legacy rate handling */
278 if (IEEE80211_IS_CHAN_ST(ni->ni_chan))
279 mode = IEEE80211_MODE_STURBO_A;
280 else if (IEEE80211_IS_CHAN_HALF(ni->ni_chan))
281 mode = IEEE80211_MODE_HALF;
282 else if (IEEE80211_IS_CHAN_QUARTER(ni->ni_chan))
283 mode = IEEE80211_MODE_QUARTER;
284 /* NB: 108A should be handled as 11a */
285 else if (IEEE80211_IS_CHAN_A(ni->ni_chan))
286 mode = IEEE80211_MODE_11A;
287 else if (IEEE80211_IS_CHAN_108G(ni->ni_chan) ||
288 (ni->ni_flags & IEEE80211_NODE_ERP))
289 mode = IEEE80211_MODE_11G;
290 else
291 mode = IEEE80211_MODE_11B;
292 }
293 ni->ni_txparms = &vap->iv_txparms[mode];
294 }
295
296 /*
297 * Set/change the channel. The rate set is also updated as
298 * to insure a consistent view by drivers.
299 * XXX should be private but hostap needs it to deal with CSA
300 */
301 void
ieee80211_node_set_chan(struct ieee80211_node * ni,struct ieee80211_channel * chan)302 ieee80211_node_set_chan(struct ieee80211_node *ni,
303 struct ieee80211_channel *chan)
304 {
305 struct ieee80211com *ic = ni->ni_ic;
306 struct ieee80211vap *vap = ni->ni_vap;
307 enum ieee80211_phymode mode;
308
309 KASSERT(chan != IEEE80211_CHAN_ANYC, ("no channel"));
310
311 ni->ni_chan = chan;
312 mode = ieee80211_chan2mode(chan);
313 if (IEEE80211_IS_CHAN_HT(chan)) {
314 /*
315 * We must install the legacy rate est in ni_rates and the
316 * HT rate set in ni_htrates.
317 */
318 ni->ni_htrates = *ieee80211_get_suphtrates(ic, chan);
319 /*
320 * Setup bss tx parameters based on operating mode. We
321 * use legacy rates when operating in a mixed HT+non-HT bss
322 * and non-ERP rates in 11g for mixed ERP+non-ERP bss.
323 */
324 if (mode == IEEE80211_MODE_11NA &&
325 (vap->iv_flags_ht & IEEE80211_FHT_PUREN) == 0)
326 mode = IEEE80211_MODE_11A;
327 else if (mode == IEEE80211_MODE_11NG &&
328 (vap->iv_flags_ht & IEEE80211_FHT_PUREN) == 0)
329 mode = IEEE80211_MODE_11G;
330 if (mode == IEEE80211_MODE_11G &&
331 (vap->iv_flags & IEEE80211_F_PUREG) == 0)
332 mode = IEEE80211_MODE_11B;
333 }
334 ni->ni_txparms = &vap->iv_txparms[mode];
335 ni->ni_rates = *ieee80211_get_suprates(ic, chan);
336 }
337
338 static __inline void
copy_bss(struct ieee80211_node * nbss,const struct ieee80211_node * obss)339 copy_bss(struct ieee80211_node *nbss, const struct ieee80211_node *obss)
340 {
341 /* propagate useful state */
342 nbss->ni_authmode = obss->ni_authmode;
343 nbss->ni_txpower = obss->ni_txpower;
344 nbss->ni_vlan = obss->ni_vlan;
345 /* XXX statistics? */
346 /* XXX legacy WDS bssid? */
347 }
348
349 void
ieee80211_create_ibss(struct ieee80211vap * vap,struct ieee80211_channel * chan)350 ieee80211_create_ibss(struct ieee80211vap* vap, struct ieee80211_channel *chan)
351 {
352 struct ieee80211com *ic = vap->iv_ic;
353 struct ieee80211_node *ni;
354
355 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN,
356 "%s: creating %s on channel %u%c flags 0x%08x\n", __func__,
357 ieee80211_opmode_name[vap->iv_opmode],
358 ieee80211_chan2ieee(ic, chan),
359 ieee80211_channel_type_char(chan),
360 chan->ic_flags);
361
362 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr,
363 __func__, __LINE__);
364 if (ni == NULL) {
365 /* XXX recovery? */
366 return;
367 }
368 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr);
369 ni->ni_esslen = vap->iv_des_ssid[0].len;
370 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen);
371 if (vap->iv_bss != NULL)
372 copy_bss(ni, vap->iv_bss);
373 ni->ni_intval = ic->ic_bintval;
374 if (vap->iv_flags & IEEE80211_F_PRIVACY)
375 ni->ni_capinfo |= IEEE80211_CAPINFO_PRIVACY;
376 if (ic->ic_phytype == IEEE80211_T_FH) {
377 ni->ni_fhdwell = 200; /* XXX */
378 ni->ni_fhindex = 1;
379 }
380 if (vap->iv_opmode == IEEE80211_M_IBSS) {
381 ni->ni_capinfo |= IEEE80211_CAPINFO_IBSS; /* XXX */
382 if (vap->iv_flags & IEEE80211_F_DESBSSID)
383 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid);
384 else {
385 net80211_get_random_bytes(ni->ni_bssid,
386 IEEE80211_ADDR_LEN);
387 /* clear group bit, add local bit */
388 ni->ni_bssid[0] = (ni->ni_bssid[0] &~ 0x01) | 0x02;
389 }
390 } else if (vap->iv_opmode == IEEE80211_M_AHDEMO) {
391 if (vap->iv_flags & IEEE80211_F_DESBSSID)
392 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid);
393 else
394 #ifdef IEEE80211_SUPPORT_TDMA
395 if ((vap->iv_caps & IEEE80211_C_TDMA) == 0)
396 #endif
397 memset(ni->ni_bssid, 0, IEEE80211_ADDR_LEN);
398 #ifdef IEEE80211_SUPPORT_MESH
399 } else if (vap->iv_opmode == IEEE80211_M_MBSS) {
400 ni->ni_meshidlen = vap->iv_mesh->ms_idlen;
401 memcpy(ni->ni_meshid, vap->iv_mesh->ms_id, ni->ni_meshidlen);
402 #endif
403 }
404 /*
405 * Fix the channel and related attributes.
406 */
407 /* clear DFS CAC state on previous channel */
408 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC &&
409 ic->ic_bsschan->ic_freq != chan->ic_freq &&
410 IEEE80211_IS_CHAN_CACDONE(ic->ic_bsschan))
411 ieee80211_dfs_cac_clear(ic, ic->ic_bsschan);
412 ic->ic_bsschan = chan;
413 ieee80211_node_set_chan(ni, chan);
414 ic->ic_curmode = ieee80211_chan2mode(chan);
415 /*
416 * Do mode-specific setup.
417 */
418 if (IEEE80211_IS_CHAN_FULL(chan)) {
419 if (IEEE80211_IS_CHAN_ANYG(chan)) {
420 /*
421 * Use a mixed 11b/11g basic rate set.
422 */
423 ieee80211_setbasicrates(&ni->ni_rates,
424 IEEE80211_MODE_11G);
425 if (vap->iv_flags & IEEE80211_F_PUREG) {
426 /*
427 * Also mark OFDM rates basic so 11b
428 * stations do not join (WiFi compliance).
429 */
430 ieee80211_addbasicrates(&ni->ni_rates,
431 IEEE80211_MODE_11A);
432 }
433 } else if (IEEE80211_IS_CHAN_B(chan)) {
434 /*
435 * Force pure 11b rate set.
436 */
437 ieee80211_setbasicrates(&ni->ni_rates,
438 IEEE80211_MODE_11B);
439 }
440 }
441
442 /* XXX TODO: other bits and pieces - eg fast-frames? */
443
444 /* If we're an 11n channel then initialise the 11n bits */
445 if (IEEE80211_IS_CHAN_VHT(ni->ni_chan)) {
446 /* XXX what else? */
447 ieee80211_ht_node_init(ni);
448 ieee80211_vht_node_init(ni);
449 } else if (IEEE80211_IS_CHAN_HT(ni->ni_chan)) {
450 /* XXX what else? */
451 ieee80211_ht_node_init(ni);
452 }
453
454 (void) ieee80211_sta_join1(ieee80211_ref_node(ni));
455 }
456
457 /*
458 * Reset bss state on transition to the INIT state.
459 * Clear any stations from the table (they have been
460 * deauth'd) and reset the bss node (clears key, rate
461 * etc. state).
462 */
463 void
ieee80211_reset_bss(struct ieee80211vap * vap)464 ieee80211_reset_bss(struct ieee80211vap *vap)
465 {
466 struct ieee80211com *ic = vap->iv_ic;
467 struct ieee80211_node *ni, *obss;
468
469 IEEE80211_LOCK_ASSERT(ic);
470
471 ieee80211_node_table_reset(&ic->ic_sta, vap);
472 /* XXX multi-bss: wrong */
473 ieee80211_vap_reset_erp(vap);
474
475 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr,
476 __func__, __LINE__);
477 KASSERT(ni != NULL, ("unable to setup initial BSS node"));
478 obss = vap->iv_update_bss(vap, ieee80211_ref_node(ni));
479 if (obss != NULL) {
480 copy_bss(ni, obss);
481 ni->ni_intval = ic->ic_bintval;
482 ieee80211_free_node(obss);
483 } else
484 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr);
485 }
486
487 static int
match_ssid(const struct ieee80211_node * ni,int nssid,const struct ieee80211_scan_ssid ssids[])488 match_ssid(const struct ieee80211_node *ni,
489 int nssid, const struct ieee80211_scan_ssid ssids[])
490 {
491 int i;
492
493 for (i = 0; i < nssid; i++) {
494 if (ni->ni_esslen == ssids[i].len &&
495 memcmp(ni->ni_essid, ssids[i].ssid, ni->ni_esslen) == 0)
496 return 1;
497 }
498 return 0;
499 }
500
501 /*
502 * Test a node for suitability/compatibility.
503 */
504 static int
check_bss(struct ieee80211vap * vap,struct ieee80211_node * ni)505 check_bss(struct ieee80211vap *vap, struct ieee80211_node *ni)
506 {
507 struct ieee80211com *ic = ni->ni_ic;
508 uint8_t rate;
509
510 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan)))
511 return 0;
512 if (vap->iv_opmode == IEEE80211_M_IBSS) {
513 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0)
514 return 0;
515 } else {
516 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0)
517 return 0;
518 }
519 if (vap->iv_flags & IEEE80211_F_PRIVACY) {
520 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0)
521 return 0;
522 } else {
523 /* XXX does this mean privacy is supported or required? */
524 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY)
525 return 0;
526 }
527 rate = ieee80211_fix_rate(ni, &ni->ni_rates,
528 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE);
529 if (rate & IEEE80211_RATE_BASIC)
530 return 0;
531 if (vap->iv_des_nssid != 0 &&
532 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid))
533 return 0;
534 if ((vap->iv_flags & IEEE80211_F_DESBSSID) &&
535 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid))
536 return 0;
537 return 1;
538 }
539
540 #ifdef IEEE80211_DEBUG
541 /*
542 * Display node suitability/compatibility.
543 */
544 static void
check_bss_debug(struct ieee80211vap * vap,struct ieee80211_node * ni)545 check_bss_debug(struct ieee80211vap *vap, struct ieee80211_node *ni)
546 {
547 struct ieee80211com *ic = ni->ni_ic;
548 uint8_t rate;
549 int fail;
550
551 fail = 0;
552 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan)))
553 fail |= 0x01;
554 if (vap->iv_opmode == IEEE80211_M_IBSS) {
555 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0)
556 fail |= 0x02;
557 } else {
558 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0)
559 fail |= 0x02;
560 }
561 if (vap->iv_flags & IEEE80211_F_PRIVACY) {
562 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0)
563 fail |= 0x04;
564 } else {
565 /* XXX does this mean privacy is supported or required? */
566 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY)
567 fail |= 0x04;
568 }
569 rate = ieee80211_fix_rate(ni, &ni->ni_rates,
570 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE);
571 if (rate & IEEE80211_RATE_BASIC)
572 fail |= 0x08;
573 if (vap->iv_des_nssid != 0 &&
574 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid))
575 fail |= 0x10;
576 if ((vap->iv_flags & IEEE80211_F_DESBSSID) &&
577 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid))
578 fail |= 0x20;
579
580 printf(" %c %s", fail ? '-' : '+', ether_sprintf(ni->ni_macaddr));
581 printf(" %s%c", ether_sprintf(ni->ni_bssid), fail & 0x20 ? '!' : ' ');
582 printf(" %3d%c",
583 ieee80211_chan2ieee(ic, ni->ni_chan), fail & 0x01 ? '!' : ' ');
584 printf(" %2dM%c", (rate & IEEE80211_RATE_VAL) / 2,
585 fail & 0x08 ? '!' : ' ');
586 printf(" %4s%c",
587 (ni->ni_capinfo & IEEE80211_CAPINFO_ESS) ? "ess" :
588 (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) ? "ibss" :
589 "????",
590 fail & 0x02 ? '!' : ' ');
591 printf(" %3s%c ",
592 (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) ? "wep" : "no",
593 fail & 0x04 ? '!' : ' ');
594 ieee80211_print_essid(ni->ni_essid, ni->ni_esslen);
595 printf("%s\n", fail & 0x10 ? "!" : "");
596 }
597 #endif /* IEEE80211_DEBUG */
598
599 int
ieee80211_ibss_merge_check(struct ieee80211_node * ni)600 ieee80211_ibss_merge_check(struct ieee80211_node *ni)
601 {
602 struct ieee80211vap *vap = ni->ni_vap;
603
604 if (ni == vap->iv_bss ||
605 IEEE80211_ADDR_EQ(ni->ni_bssid, vap->iv_bss->ni_bssid)) {
606 /* unchanged, nothing to do */
607 return 0;
608 }
609
610 if (!check_bss(vap, ni)) {
611 /* capabilities mismatch */
612 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC,
613 "%s: merge failed, capabilities mismatch\n", __func__);
614 #ifdef IEEE80211_DEBUG
615 if (ieee80211_msg_assoc(vap))
616 check_bss_debug(vap, ni);
617 #endif
618 vap->iv_stats.is_ibss_capmismatch++;
619 return 0;
620 }
621
622 return 1;
623 }
624
625 /*
626 * Check if the given node should populate the node table.
627 *
628 * We need to be in "see all beacons for all ssids" mode in order
629 * to do IBSS merges, however this means we will populate nodes for
630 * /all/ IBSS SSIDs, versus just the one we care about.
631 *
632 * So this check ensures the node can actually belong to our IBSS
633 * configuration. For now it simply checks the SSID.
634 */
635 int
ieee80211_ibss_node_check_new(struct ieee80211_node * ni,const struct ieee80211_scanparams * scan)636 ieee80211_ibss_node_check_new(struct ieee80211_node *ni,
637 const struct ieee80211_scanparams *scan)
638 {
639 struct ieee80211vap *vap = ni->ni_vap;
640 int i;
641
642 /*
643 * If we have no SSID and no scan SSID, return OK.
644 */
645 if (vap->iv_des_nssid == 0 && scan->ssid == NULL)
646 goto ok;
647
648 /*
649 * If we have one of (SSID, scan SSID) then return error.
650 */
651 if (!! (vap->iv_des_nssid == 0) != !! (scan->ssid == NULL))
652 goto mismatch;
653
654 /*
655 * Double-check - we need scan SSID.
656 */
657 if (scan->ssid == NULL)
658 goto mismatch;
659
660 /*
661 * Check if the scan SSID matches the SSID list for the VAP.
662 */
663 for (i = 0; i < vap->iv_des_nssid; i++) {
664 /* Sanity length check */
665 if (vap->iv_des_ssid[i].len != scan->ssid[1])
666 continue;
667
668 /* Note: SSID in the scan entry is the IE format */
669 if (memcmp(vap->iv_des_ssid[i].ssid, scan->ssid + 2,
670 vap->iv_des_ssid[i].len) == 0)
671 goto ok;
672 }
673
674 mismatch:
675 return (0);
676 ok:
677 return (1);
678 }
679
680 /*
681 * Handle 802.11 ad hoc network merge. The
682 * convention, set by the Wireless Ethernet Compatibility Alliance
683 * (WECA), is that an 802.11 station will change its BSSID to match
684 * the "oldest" 802.11 ad hoc network, on the same channel, that
685 * has the station's desired SSID. The "oldest" 802.11 network
686 * sends beacons with the greatest TSF timestamp.
687 *
688 * The caller is assumed to validate TSF's before attempting a merge.
689 *
690 * Return !0 if the BSSID changed, 0 otherwise.
691 */
692 int
ieee80211_ibss_merge(struct ieee80211_node * ni)693 ieee80211_ibss_merge(struct ieee80211_node *ni)
694 {
695 #ifdef IEEE80211_DEBUG
696 struct ieee80211vap *vap = ni->ni_vap;
697 #endif
698
699 if (! ieee80211_ibss_merge_check(ni))
700 return 0;
701
702 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC,
703 "%s: new bssid %s: %s preamble, %s slot time%s\n", __func__,
704 ether_sprintf(ni->ni_bssid),
705 vap->iv_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long",
706 vap->iv_flags&IEEE80211_F_SHSLOT ? "short" : "long",
707 vap->iv_flags&IEEE80211_F_USEPROT ? ", protection" : ""
708 );
709 return ieee80211_sta_join1(ieee80211_ref_node(ni));
710 }
711
712 /*
713 * Calculate HT channel promotion flags for all vaps.
714 * This assumes ni_chan have been setup for each vap.
715 */
716 static int
gethtadjustflags(struct ieee80211com * ic)717 gethtadjustflags(struct ieee80211com *ic)
718 {
719 struct ieee80211vap *vap;
720 int flags;
721
722 flags = 0;
723 /* XXX locking */
724 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
725 if (vap->iv_state < IEEE80211_S_RUN)
726 continue;
727 switch (vap->iv_opmode) {
728 case IEEE80211_M_WDS:
729 case IEEE80211_M_STA:
730 case IEEE80211_M_AHDEMO:
731 case IEEE80211_M_HOSTAP:
732 case IEEE80211_M_IBSS:
733 case IEEE80211_M_MBSS:
734 flags |= ieee80211_htchanflags(vap->iv_bss->ni_chan);
735 break;
736 default:
737 break;
738 }
739 }
740 return flags;
741 }
742
743 /*
744 * Calculate VHT channel promotion flags for all vaps.
745 * This assumes ni_chan have been setup for each vap.
746 */
747 static int
getvhtadjustflags(struct ieee80211com * ic)748 getvhtadjustflags(struct ieee80211com *ic)
749 {
750 struct ieee80211vap *vap;
751 int flags;
752
753 flags = 0;
754 /* XXX locking */
755 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
756 if (vap->iv_state < IEEE80211_S_RUN)
757 continue;
758 switch (vap->iv_opmode) {
759 case IEEE80211_M_WDS:
760 case IEEE80211_M_STA:
761 case IEEE80211_M_AHDEMO:
762 case IEEE80211_M_HOSTAP:
763 case IEEE80211_M_IBSS:
764 case IEEE80211_M_MBSS:
765 flags |= ieee80211_vhtchanflags(vap->iv_bss->ni_chan);
766 break;
767 default:
768 break;
769 }
770 }
771 return flags;
772 }
773
774 /*
775 * Check if the current channel needs to change based on whether
776 * any vap's are using HT20/HT40. This is used to sync the state
777 * of ic_curchan after a channel width change on a running vap.
778 *
779 * Same applies for VHT.
780 */
781 void
ieee80211_sync_curchan(struct ieee80211com * ic)782 ieee80211_sync_curchan(struct ieee80211com *ic)
783 {
784 struct ieee80211_channel *c;
785
786 c = ieee80211_ht_adjust_channel(ic, ic->ic_curchan, gethtadjustflags(ic));
787 c = ieee80211_vht_adjust_channel(ic, c, getvhtadjustflags(ic));
788
789 if (c != ic->ic_curchan) {
790 ic->ic_curchan = c;
791 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan);
792 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan);
793 IEEE80211_UNLOCK(ic);
794 ic->ic_set_channel(ic);
795 ieee80211_radiotap_chan_change(ic);
796 IEEE80211_LOCK(ic);
797 }
798 }
799
800 /*
801 * Setup the current channel. The request channel may be
802 * promoted if other vap's are operating with HT20/HT40.
803 */
804 void
ieee80211_setupcurchan(struct ieee80211com * ic,struct ieee80211_channel * c)805 ieee80211_setupcurchan(struct ieee80211com *ic, struct ieee80211_channel *c)
806 {
807 if (ic->ic_htcaps & IEEE80211_HTC_HT) {
808 int flags = gethtadjustflags(ic);
809 /*
810 * Check for channel promotion required to support the
811 * set of running vap's. This assumes we are called
812 * after ni_chan is setup for each vap.
813 */
814 /* XXX VHT? */
815 /* NB: this assumes IEEE80211_FHT_USEHT40 > IEEE80211_FHT_HT */
816 if (flags > ieee80211_htchanflags(c))
817 c = ieee80211_ht_adjust_channel(ic, c, flags);
818 }
819
820 /*
821 * VHT promotion - this will at least promote to VHT20/40
822 * based on what HT has done; it may further promote the
823 * channel to VHT80 or above.
824 */
825 if (ic->ic_vht_cap.vht_cap_info != 0) {
826 int flags = getvhtadjustflags(ic);
827 if (flags > ieee80211_vhtchanflags(c))
828 c = ieee80211_vht_adjust_channel(ic, c, flags);
829 }
830
831 ic->ic_bsschan = ic->ic_curchan = c;
832 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan);
833 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan);
834 }
835
836 /*
837 * Change the current channel. The channel change is guaranteed to have
838 * happened before the next state change.
839 */
840 void
ieee80211_setcurchan(struct ieee80211com * ic,struct ieee80211_channel * c)841 ieee80211_setcurchan(struct ieee80211com *ic, struct ieee80211_channel *c)
842 {
843 ieee80211_setupcurchan(ic, c);
844 ieee80211_runtask(ic, &ic->ic_chan_task);
845 }
846
847 void
ieee80211_update_chw(struct ieee80211com * ic)848 ieee80211_update_chw(struct ieee80211com *ic)
849 {
850
851 ieee80211_setupcurchan(ic, ic->ic_curchan);
852 ieee80211_runtask(ic, &ic->ic_chw_task);
853 }
854
855 /*
856 * Join the specified IBSS/BSS network. The node is assumed to
857 * be passed in with a held reference.
858 */
859 static int
ieee80211_sta_join1(struct ieee80211_node * selbs)860 ieee80211_sta_join1(struct ieee80211_node *selbs)
861 {
862 struct ieee80211vap *vap = selbs->ni_vap;
863 struct ieee80211com *ic = selbs->ni_ic;
864 struct ieee80211_node *obss;
865 int canreassoc;
866
867 /*
868 * Committed to selbs, setup state.
869 */
870 IEEE80211_LOCK(ic); /* XXX may recurse here, check callers. */
871 obss = vap->iv_update_bss(vap, selbs); /* NB: caller assumed to bump refcnt */
872 IEEE80211_UNLOCK(ic);
873 /*
874 * Check if old+new node have the same address in which
875 * case we can reassociate when operating in sta mode.
876 */
877 /* XXX We'll not be in RUN anymore as iv_state got updated already? */
878 canreassoc = (obss != NULL &&
879 vap->iv_state == IEEE80211_S_RUN &&
880 IEEE80211_ADDR_EQ(obss->ni_macaddr, selbs->ni_macaddr));
881 if (obss != NULL) {
882 struct ieee80211_node_table *nt = obss->ni_table;
883
884 copy_bss(selbs, obss);
885 if (nt != NULL) {
886 ieee80211_node_decref(obss); /* iv_bss reference */
887 IEEE80211_NODE_LOCK(nt);
888 node_reclaim(nt, obss); /* station table reference */
889 IEEE80211_NODE_UNLOCK(nt);
890 } else {
891 ieee80211_free_node(obss); /* iv_bss reference */
892 }
893
894 obss = NULL; /* NB: guard against later use */
895 }
896
897 /*
898 * Delete unusable rates; we've already checked
899 * that the negotiated rate set is acceptable.
900 */
901 ieee80211_fix_rate(vap->iv_bss, &vap->iv_bss->ni_rates,
902 IEEE80211_F_DODEL | IEEE80211_F_JOIN);
903
904 ieee80211_setcurchan(ic, selbs->ni_chan);
905 /*
906 * Set the erp state (mostly the slot time) to deal with
907 * the auto-select case; this should be redundant if the
908 * mode is locked.
909 */
910 ieee80211_vap_reset_erp(vap);
911 ieee80211_wme_initparams(vap);
912
913 if (vap->iv_opmode == IEEE80211_M_STA) {
914 if (canreassoc) {
915 /* Reassociate */
916 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 1);
917 } else {
918 /*
919 * Act as if we received a DEAUTH frame in case we
920 * are invoked from the RUN state. This will cause
921 * us to try to re-authenticate if we are operating
922 * as a station.
923 */
924 IEEE80211_DPRINTF(vap, IEEE80211_MSG_AUTH,
925 "%s %p<%s> %s -> AUTH, FC0_SUBTYPE_DEAUTH\n",
926 __func__, selbs, ether_sprintf(selbs->ni_macaddr),
927 ieee80211_state_name[vap->iv_state]);
928 ieee80211_new_state(vap, IEEE80211_S_AUTH,
929 IEEE80211_FC0_SUBTYPE_DEAUTH);
930 }
931 } else
932 ieee80211_new_state(vap, IEEE80211_S_RUN, -1);
933 return 1;
934 }
935
936 int
ieee80211_sta_join(struct ieee80211vap * vap,struct ieee80211_channel * chan,const struct ieee80211_scan_entry * se)937 ieee80211_sta_join(struct ieee80211vap *vap, struct ieee80211_channel *chan,
938 const struct ieee80211_scan_entry *se)
939 {
940 struct ieee80211com *ic = vap->iv_ic;
941 struct ieee80211_node *ni;
942 int do_ht = 0;
943
944 ni = ieee80211_alloc_node(&ic->ic_sta, vap, se->se_macaddr,
945 __func__, __LINE__);
946 if (ni == NULL) {
947 /* XXX msg */
948 return 0;
949 }
950
951 /*
952 * Expand scan state into node's format.
953 * XXX may not need all this stuff
954 */
955 IEEE80211_ADDR_COPY(ni->ni_bssid, se->se_bssid);
956 ni->ni_esslen = se->se_ssid[1];
957 memcpy(ni->ni_essid, se->se_ssid+2, ni->ni_esslen);
958 ni->ni_tstamp.tsf = se->se_tstamp.tsf;
959 ni->ni_intval = se->se_intval;
960 ni->ni_capinfo = se->se_capinfo;
961 ni->ni_chan = chan;
962 ni->ni_timoff = se->se_timoff;
963 ni->ni_fhdwell = se->se_fhdwell;
964 ni->ni_fhindex = se->se_fhindex;
965 ni->ni_erp = se->se_erp;
966 IEEE80211_RSSI_LPF(ni->ni_avgrssi, se->se_rssi);
967 ni->ni_noise = se->se_noise;
968 if (vap->iv_opmode == IEEE80211_M_STA) {
969 /* NB: only infrastructure mode requires an associd */
970 ni->ni_flags |= IEEE80211_NODE_ASSOCID;
971 }
972
973 if (ieee80211_ies_init(&ni->ni_ies, se->se_ies.data, se->se_ies.len)) {
974 ieee80211_ies_expand(&ni->ni_ies);
975 #ifdef IEEE80211_SUPPORT_SUPERG
976 if (ni->ni_ies.ath_ie != NULL)
977 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie);
978 #endif
979 if (ni->ni_ies.htcap_ie != NULL)
980 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie);
981 if (ni->ni_ies.htinfo_ie != NULL)
982 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie);
983 #ifdef IEEE80211_SUPPORT_MESH
984 if (ni->ni_ies.meshid_ie != NULL)
985 ieee80211_parse_meshid(ni, ni->ni_ies.meshid_ie);
986 #endif
987 #ifdef IEEE80211_SUPPORT_TDMA
988 if (ni->ni_ies.tdma_ie != NULL)
989 ieee80211_parse_tdma(ni, ni->ni_ies.tdma_ie);
990 #endif
991 if (ni->ni_ies.vhtcap_ie != NULL)
992 ieee80211_parse_vhtcap(ni, ni->ni_ies.vhtcap_ie);
993 if (ni->ni_ies.vhtopmode_ie != NULL)
994 ieee80211_parse_vhtopmode(ni, ni->ni_ies.vhtopmode_ie);
995
996 /* XXX parse BSSLOAD IE */
997 /* XXX parse TXPWRENV IE */
998 /* XXX parse APCHANREP IE */
999 }
1000
1001 vap->iv_dtim_period = se->se_dtimperiod;
1002 vap->iv_dtim_count = 0;
1003
1004 /* NB: must be after ni_chan is setup */
1005 ieee80211_setup_rates(ni, se->se_rates, se->se_xrates,
1006 IEEE80211_F_DOSORT);
1007 if (ieee80211_iserp_rateset(&ni->ni_rates))
1008 ni->ni_flags |= IEEE80211_NODE_ERP;
1009
1010 /*
1011 * Setup HT state for this node if it's available, otherwise
1012 * non-STA modes won't pick this state up.
1013 *
1014 * For IBSS and related modes that don't go through an
1015 * association request/response, the only appropriate place
1016 * to setup the HT state is here.
1017 */
1018 if (ni->ni_ies.htinfo_ie != NULL &&
1019 ni->ni_ies.htcap_ie != NULL &&
1020 vap->iv_flags_ht & IEEE80211_FHT_HT) {
1021 ieee80211_ht_node_init(ni);
1022 ieee80211_ht_updateparams(ni,
1023 ni->ni_ies.htcap_ie,
1024 ni->ni_ies.htinfo_ie);
1025 do_ht = 1;
1026 }
1027
1028 /*
1029 * Setup VHT state for this node if it's available.
1030 * Same as the above.
1031 *
1032 * For now, don't allow 2GHz VHT operation.
1033 */
1034 if (ni->ni_ies.vhtopmode_ie != NULL &&
1035 ni->ni_ies.vhtcap_ie != NULL &&
1036 vap->iv_vht_flags & IEEE80211_FVHT_VHT) {
1037 if (IEEE80211_IS_CHAN_2GHZ(ni->ni_chan)) {
1038 printf("%s: BSS %6D: 2GHz channel, VHT info; ignoring\n",
1039 __func__,
1040 ni->ni_macaddr,
1041 ":");
1042 } else {
1043 ieee80211_vht_node_init(ni);
1044 ieee80211_vht_updateparams(ni,
1045 ni->ni_ies.vhtcap_ie,
1046 ni->ni_ies.vhtopmode_ie);
1047 ieee80211_setup_vht_rates(ni, ni->ni_ies.vhtcap_ie,
1048 ni->ni_ies.vhtopmode_ie);
1049 do_ht = 1;
1050 }
1051 }
1052
1053 /* Finally do the node channel change */
1054 if (do_ht) {
1055 ieee80211_ht_updateparams_final(ni, ni->ni_ies.htcap_ie,
1056 ni->ni_ies.htinfo_ie);
1057 ieee80211_setup_htrates(ni, ni->ni_ies.htcap_ie,
1058 IEEE80211_F_JOIN | IEEE80211_F_DOBRS);
1059 ieee80211_setup_basic_htrates(ni, ni->ni_ies.htinfo_ie);
1060 }
1061
1062 /* XXX else check for ath FF? */
1063 /* XXX QoS? Difficult given that WME config is specific to a master */
1064
1065 ieee80211_node_setuptxparms(ni);
1066 ieee80211_ratectl_node_init(ni);
1067
1068 return ieee80211_sta_join1(ieee80211_ref_node(ni));
1069 }
1070
1071 /*
1072 * Leave the specified IBSS/BSS network. The node is assumed to
1073 * be passed in with a held reference.
1074 */
1075 void
ieee80211_sta_leave(struct ieee80211_node * ni)1076 ieee80211_sta_leave(struct ieee80211_node *ni)
1077 {
1078 struct ieee80211com *ic = ni->ni_ic;
1079
1080 ic->ic_node_cleanup(ni);
1081 ieee80211_notify_node_leave(ni);
1082 }
1083
1084 /*
1085 * Send a deauthenticate frame and drop the station.
1086 */
1087 void
ieee80211_node_deauth(struct ieee80211_node * ni,int reason)1088 ieee80211_node_deauth(struct ieee80211_node *ni, int reason)
1089 {
1090 /* NB: bump the refcnt to be sure temporary nodes are not reclaimed */
1091 ieee80211_ref_node(ni);
1092 if (ni->ni_associd != 0)
1093 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH, reason);
1094 ieee80211_node_leave(ni);
1095 ieee80211_free_node(ni);
1096 }
1097
1098 static struct ieee80211_node *
node_alloc(struct ieee80211vap * vap,const uint8_t macaddr[IEEE80211_ADDR_LEN])1099 node_alloc(struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN])
1100 {
1101 struct ieee80211_node *ni;
1102
1103 ni = (struct ieee80211_node *) IEEE80211_MALLOC(sizeof(struct ieee80211_node),
1104 M_80211_NODE, IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
1105 return ni;
1106 }
1107
1108 static int
node_init(struct ieee80211_node * ni)1109 node_init(struct ieee80211_node *ni)
1110 {
1111 return 0;
1112 }
1113
1114 /*
1115 * Initialize an ie blob with the specified data. If previous
1116 * data exists re-use the data block. As a side effect we clear
1117 * all references to specific ie's; the caller is required to
1118 * recalculate them.
1119 */
1120 int
ieee80211_ies_init(struct ieee80211_ies * ies,const uint8_t * data,int len)1121 ieee80211_ies_init(struct ieee80211_ies *ies, const uint8_t *data, int len)
1122 {
1123 /* NB: assumes data+len are the last fields */
1124 memset(ies, 0, offsetof(struct ieee80211_ies, data));
1125 if (ies->data != NULL && ies->len != len) {
1126 /* data size changed */
1127 IEEE80211_FREE(ies->data, M_80211_NODE_IE);
1128 ies->data = NULL;
1129 }
1130 if (ies->data == NULL) {
1131 ies->data = (uint8_t *) IEEE80211_MALLOC(len, M_80211_NODE_IE,
1132 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
1133 if (ies->data == NULL) {
1134 ies->len = 0;
1135 /* NB: pointers have already been zero'd above */
1136 return 0;
1137 }
1138 }
1139 memcpy(ies->data, data, len);
1140 ies->len = len;
1141 return 1;
1142 }
1143
1144 /*
1145 * Reclaim storage for an ie blob.
1146 */
1147 void
ieee80211_ies_cleanup(struct ieee80211_ies * ies)1148 ieee80211_ies_cleanup(struct ieee80211_ies *ies)
1149 {
1150 if (ies->data != NULL)
1151 IEEE80211_FREE(ies->data, M_80211_NODE_IE);
1152 }
1153
1154 /*
1155 * Expand an ie blob data contents and to fillin individual
1156 * ie pointers. The data blob is assumed to be well-formed;
1157 * we don't do any validity checking of ie lengths.
1158 */
1159 void
ieee80211_ies_expand(struct ieee80211_ies * ies)1160 ieee80211_ies_expand(struct ieee80211_ies *ies)
1161 {
1162 uint8_t *ie;
1163 int ielen;
1164
1165 ie = ies->data;
1166 ielen = ies->len;
1167 while (ielen > 1) {
1168 /* Make sure the given IE length fits into the total length. */
1169 if ((2 + ie[1]) > ielen) {
1170 printf("%s: malformed IEs! ies %p { data %p len %d }: "
1171 "ie %u len 2+%u > total len left %d\n",
1172 __func__, ies, ies->data, ies->len,
1173 ie[0], ie[1], ielen);
1174 return;
1175 }
1176 switch (ie[0]) {
1177 case IEEE80211_ELEMID_VENDOR:
1178 if (iswpaoui(ie))
1179 ies->wpa_ie = ie;
1180 else if (iswmeoui(ie))
1181 ies->wme_ie = ie;
1182 #ifdef IEEE80211_SUPPORT_SUPERG
1183 else if (isatherosoui(ie))
1184 ies->ath_ie = ie;
1185 #endif
1186 #ifdef IEEE80211_SUPPORT_TDMA
1187 else if (istdmaoui(ie))
1188 ies->tdma_ie = ie;
1189 #endif
1190 break;
1191 case IEEE80211_ELEMID_RSN:
1192 ies->rsn_ie = ie;
1193 break;
1194 case IEEE80211_ELEMID_HTCAP:
1195 ies->htcap_ie = ie;
1196 break;
1197 case IEEE80211_ELEMID_HTINFO:
1198 ies->htinfo_ie = ie;
1199 break;
1200 #ifdef IEEE80211_SUPPORT_MESH
1201 case IEEE80211_ELEMID_MESHID:
1202 ies->meshid_ie = ie;
1203 break;
1204 #endif
1205 case IEEE80211_ELEMID_VHT_CAP:
1206 ies->vhtcap_ie = ie;
1207 break;
1208 case IEEE80211_ELEMID_VHT_OPMODE:
1209 ies->vhtopmode_ie = ie;
1210 break;
1211 case IEEE80211_ELEMID_VHT_PWR_ENV:
1212 ies->vhtpwrenv_ie = ie;
1213 break;
1214 case IEEE80211_ELEMID_BSSLOAD:
1215 ies->bssload_ie = ie;
1216 break;
1217 case IEEE80211_ELEMID_APCHANREP:
1218 ies->apchanrep_ie = ie;
1219 break;
1220 }
1221 ielen -= 2 + ie[1];
1222 ie += 2 + ie[1];
1223 }
1224 }
1225
1226 /*
1227 * Reclaim any resources in a node and reset any critical
1228 * state. Typically nodes are free'd immediately after,
1229 * but in some cases the storage may be reused so we need
1230 * to insure consistent state (should probably fix that).
1231 */
1232 static void
node_cleanup(struct ieee80211_node * ni)1233 node_cleanup(struct ieee80211_node *ni)
1234 {
1235 struct ieee80211vap *vap = ni->ni_vap;
1236 struct ieee80211com *ic = ni->ni_ic;
1237 int i;
1238
1239 /* NB: preserve ni_table */
1240 if (ni->ni_flags & IEEE80211_NODE_PWR_MGT) {
1241 if (vap->iv_opmode != IEEE80211_M_STA)
1242 vap->iv_ps_sta--;
1243 ni->ni_flags &= ~IEEE80211_NODE_PWR_MGT;
1244 IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni,
1245 "power save mode off, %u sta's in ps mode", vap->iv_ps_sta);
1246 }
1247 /*
1248 * Cleanup any VHT and HT-related state.
1249 */
1250 if (ni->ni_flags & IEEE80211_NODE_VHT)
1251 ieee80211_vht_node_cleanup(ni);
1252 if (ni->ni_flags & IEEE80211_NODE_HT)
1253 ieee80211_ht_node_cleanup(ni);
1254 #ifdef IEEE80211_SUPPORT_SUPERG
1255 /* Always do FF node cleanup; for A-MSDU */
1256 ieee80211_ff_node_cleanup(ni);
1257 #endif
1258 #ifdef IEEE80211_SUPPORT_MESH
1259 /*
1260 * Cleanup any mesh-related state.
1261 */
1262 if (vap->iv_opmode == IEEE80211_M_MBSS)
1263 ieee80211_mesh_node_cleanup(ni);
1264 #endif
1265 /*
1266 * Clear any staging queue entries.
1267 */
1268 ieee80211_ageq_drain_node(&ic->ic_stageq, ni);
1269
1270 /*
1271 * Clear AREF flag that marks the authorization refcnt bump
1272 * has happened. This is probably not needed as the node
1273 * should always be removed from the table so not found but
1274 * do it just in case.
1275 * Likewise clear the ASSOCID flag as these flags are intended
1276 * to be managed in tandem.
1277 */
1278 ni->ni_flags &= ~(IEEE80211_NODE_AREF | IEEE80211_NODE_ASSOCID);
1279
1280 /*
1281 * Drain power save queue and, if needed, clear TIM.
1282 */
1283 if (ieee80211_node_psq_drain(ni) != 0 && vap->iv_set_tim != NULL)
1284 vap->iv_set_tim(ni, 0);
1285
1286 ni->ni_associd = 0;
1287 if (ni->ni_challenge != NULL) {
1288 IEEE80211_FREE(ni->ni_challenge, M_80211_NODE);
1289 ni->ni_challenge = NULL;
1290 }
1291 /*
1292 * Preserve SSID, WPA, and WME ie's so the bss node is
1293 * reusable during a re-auth/re-assoc state transition.
1294 * If we remove these data they will not be recreated
1295 * because they come from a probe-response or beacon frame
1296 * which cannot be expected prior to the association-response.
1297 * This should not be an issue when operating in other modes
1298 * as stations leaving always go through a full state transition
1299 * which will rebuild this state.
1300 *
1301 * XXX does this leave us open to inheriting old state?
1302 */
1303 for (i = 0; i < nitems(ni->ni_rxfrag); i++)
1304 if (ni->ni_rxfrag[i] != NULL) {
1305 m_freem(ni->ni_rxfrag[i]);
1306 ni->ni_rxfrag[i] = NULL;
1307 }
1308 /*
1309 * Must be careful here to remove any key map entry w/o a LOR.
1310 */
1311 ieee80211_node_delucastkey(ni);
1312 }
1313
1314 static void
node_free(struct ieee80211_node * ni)1315 node_free(struct ieee80211_node *ni)
1316 {
1317 struct ieee80211com *ic = ni->ni_ic;
1318
1319 ieee80211_ratectl_node_deinit(ni);
1320 ic->ic_node_cleanup(ni);
1321 ieee80211_ies_cleanup(&ni->ni_ies);
1322 ieee80211_psq_cleanup(&ni->ni_psq);
1323 IEEE80211_FREE(ni, M_80211_NODE);
1324 }
1325
1326 static void
node_age(struct ieee80211_node * ni)1327 node_age(struct ieee80211_node *ni)
1328 {
1329 struct ieee80211vap *vap = ni->ni_vap;
1330
1331 /*
1332 * Age frames on the power save queue.
1333 */
1334 if (ieee80211_node_psq_age(ni) != 0 &&
1335 ni->ni_psq.psq_len == 0 && vap->iv_set_tim != NULL)
1336 vap->iv_set_tim(ni, 0);
1337 /*
1338 * Age out HT resources (e.g. frames on the
1339 * A-MPDU reorder queues).
1340 */
1341 if (ni->ni_associd != 0 && (ni->ni_flags & IEEE80211_NODE_HT))
1342 ieee80211_ht_node_age(ni);
1343 }
1344
1345 static int8_t
node_getrssi(const struct ieee80211_node * ni)1346 node_getrssi(const struct ieee80211_node *ni)
1347 {
1348 uint32_t avgrssi = ni->ni_avgrssi;
1349 int32_t rssi;
1350
1351 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER)
1352 return 0;
1353 rssi = IEEE80211_RSSI_GET(avgrssi);
1354 return rssi < 0 ? 0 : rssi > 127 ? 127 : rssi;
1355 }
1356
1357 static void
node_getsignal(const struct ieee80211_node * ni,int8_t * rssi,int8_t * noise)1358 node_getsignal(const struct ieee80211_node *ni, int8_t *rssi, int8_t *noise)
1359 {
1360 *rssi = node_getrssi(ni);
1361 *noise = ni->ni_noise;
1362 }
1363
1364 static void
node_getmimoinfo(const struct ieee80211_node * ni,struct ieee80211_mimo_info * info)1365 node_getmimoinfo(const struct ieee80211_node *ni,
1366 struct ieee80211_mimo_info *info)
1367 {
1368 int i;
1369 uint32_t avgrssi;
1370 int32_t rssi;
1371
1372 bzero(info, sizeof(*info));
1373
1374 for (i = 0; i < MIN(IEEE80211_MAX_CHAINS, ni->ni_mimo_chains); i++) {
1375 /* Note: for now, just pri20 channel info */
1376 avgrssi = ni->ni_mimo_rssi_ctl[i];
1377 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) {
1378 info->ch[i].rssi[0] = 0;
1379 } else {
1380 rssi = IEEE80211_RSSI_GET(avgrssi);
1381 info->ch[i].rssi[0] = rssi < 0 ? 0 : rssi > 127 ? 127 : rssi;
1382 }
1383 info->ch[i].noise[0] = ni->ni_mimo_noise_ctl[i];
1384 }
1385
1386 /* XXX ext radios? */
1387
1388 /* XXX EVM? */
1389 }
1390
1391 static void
ieee80211_add_node_nt(struct ieee80211_node_table * nt,struct ieee80211_node * ni)1392 ieee80211_add_node_nt(struct ieee80211_node_table *nt,
1393 struct ieee80211_node *ni)
1394 {
1395 struct ieee80211com *ic = nt->nt_ic;
1396 int hash;
1397
1398 IEEE80211_NODE_LOCK_ASSERT(nt);
1399
1400 hash = IEEE80211_NODE_HASH(ic, ni->ni_macaddr);
1401 (void) ic; /* XXX IEEE80211_NODE_HASH */
1402 TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list);
1403 LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash);
1404 nt->nt_count++;
1405 ni->ni_table = nt;
1406 }
1407
1408 static void
ieee80211_del_node_nt(struct ieee80211_node_table * nt,struct ieee80211_node * ni)1409 ieee80211_del_node_nt(struct ieee80211_node_table *nt,
1410 struct ieee80211_node *ni)
1411 {
1412
1413 IEEE80211_NODE_LOCK_ASSERT(nt);
1414
1415 TAILQ_REMOVE(&nt->nt_node, ni, ni_list);
1416 LIST_REMOVE(ni, ni_hash);
1417 nt->nt_count--;
1418 KASSERT(nt->nt_count >= 0,
1419 ("nt_count is negative (%d)!\n", nt->nt_count));
1420 ni->ni_table = NULL;
1421 }
1422
1423 static struct ieee80211_node *
ieee80211_alloc_node(struct ieee80211_node_table * nt,struct ieee80211vap * vap,const uint8_t macaddr[IEEE80211_ADDR_LEN],const char * func __debrefcnt_used,int line __debrefcnt_used)1424 ieee80211_alloc_node(struct ieee80211_node_table *nt,
1425 struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN],
1426 const char *func __debrefcnt_used, int line __debrefcnt_used)
1427 {
1428 struct ieee80211com *ic = nt->nt_ic;
1429 struct ieee80211_node *ni;
1430
1431 ni = ic->ic_node_alloc(vap, macaddr);
1432 if (ni == NULL) {
1433 vap->iv_stats.is_rx_nodealloc++;
1434 return NULL;
1435 }
1436
1437 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1438 "%s %p<%s> in %s table\n", __func__, ni,
1439 ether_sprintf(macaddr), nt->nt_name);
1440
1441 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr);
1442 ieee80211_node_initref(ni); /* mark referenced */
1443 #ifdef IEEE80211_DEBUG_REFCNT
1444 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1445 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni,
1446 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni));
1447 #endif
1448 ni->ni_chan = IEEE80211_CHAN_ANYC;
1449 ni->ni_authmode = IEEE80211_AUTH_OPEN;
1450 ni->ni_txpower = ic->ic_txpowlimit; /* max power */
1451 ni->ni_txparms = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)];
1452 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE);
1453 ni->ni_avgrssi = IEEE80211_RSSI_DUMMY_MARKER;
1454 ni->ni_inact_reload = nt->nt_inact_init;
1455 ni->ni_inact = ni->ni_inact_reload;
1456 ni->ni_ath_defkeyix = 0x7fff;
1457 ieee80211_psq_init(&ni->ni_psq, "unknown");
1458 #ifdef IEEE80211_SUPPORT_MESH
1459 if (vap->iv_opmode == IEEE80211_M_MBSS)
1460 ieee80211_mesh_node_init(vap, ni);
1461 #endif
1462 IEEE80211_NODE_LOCK(nt);
1463 ieee80211_add_node_nt(nt, ni);
1464 ni->ni_vap = vap;
1465 ni->ni_ic = ic;
1466 IEEE80211_NODE_UNLOCK(nt);
1467
1468 /* handle failure; free node state */
1469 if (ic->ic_node_init(ni) != 0) {
1470 vap->iv_stats.is_rx_nodealloc++;
1471 ieee80211_psq_cleanup(&ni->ni_psq);
1472 ieee80211_ratectl_node_deinit(ni);
1473 __ieee80211_free_node(ni);
1474 return NULL;
1475 }
1476
1477 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni,
1478 "%s: inact_reload %u", __func__, ni->ni_inact_reload);
1479
1480 return ni;
1481 }
1482
1483 /*
1484 * Craft a temporary node suitable for sending a management frame
1485 * to the specified station. We craft only as much state as we
1486 * need to do the work since the node will be immediately reclaimed
1487 * once the send completes.
1488 */
1489 struct ieee80211_node *
ieee80211_tmp_node(struct ieee80211vap * vap,const uint8_t macaddr[IEEE80211_ADDR_LEN])1490 ieee80211_tmp_node(struct ieee80211vap *vap,
1491 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1492 {
1493 struct ieee80211com *ic = vap->iv_ic;
1494 struct ieee80211_node *ni;
1495
1496 ni = ic->ic_node_alloc(vap, macaddr);
1497 if (ni != NULL) {
1498 struct ieee80211_node *bss = vap->iv_bss;
1499
1500 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1501 "%s %p<%s>\n", __func__, ni, ether_sprintf(macaddr));
1502
1503 ni->ni_table = NULL; /* NB: pedantic */
1504 ni->ni_ic = ic; /* NB: needed to set channel */
1505 ni->ni_vap = vap;
1506
1507 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr);
1508 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid);
1509 ieee80211_node_initref(ni); /* mark referenced */
1510 #ifdef IEEE80211_DEBUG_REFCNT
1511 /* Only one caller so we skip func/line passing into the func. */
1512 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1513 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, "", -1, ni,
1514 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni));
1515 #endif
1516 /* NB: required by ieee80211_fix_rate */
1517 ieee80211_node_set_chan(ni, bss->ni_chan);
1518 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey,
1519 IEEE80211_KEYIX_NONE);
1520 ni->ni_txpower = bss->ni_txpower;
1521 /* XXX optimize away */
1522 ieee80211_psq_init(&ni->ni_psq, "unknown");
1523
1524 ieee80211_ratectl_node_init(ni);
1525
1526 /* handle failure; free node state */
1527 if (ic->ic_node_init(ni) != 0) {
1528 vap->iv_stats.is_rx_nodealloc++;
1529 ieee80211_psq_cleanup(&ni->ni_psq);
1530 ieee80211_ratectl_node_deinit(ni);
1531 __ieee80211_free_node(ni);
1532 return NULL;
1533 }
1534
1535 } else {
1536 /* XXX msg */
1537 vap->iv_stats.is_rx_nodealloc++;
1538 }
1539 return ni;
1540 }
1541
1542 struct ieee80211_node *
ieee80211_dup_bss(struct ieee80211vap * vap,const uint8_t macaddr[IEEE80211_ADDR_LEN])1543 ieee80211_dup_bss(struct ieee80211vap *vap,
1544 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1545 {
1546 struct ieee80211com *ic = vap->iv_ic;
1547 struct ieee80211_node *ni;
1548
1549 ni = ieee80211_alloc_node(&ic->ic_sta, vap, macaddr, __func__, __LINE__);
1550 if (ni != NULL) {
1551 struct ieee80211_node *bss = vap->iv_bss;
1552 /*
1553 * Inherit from iv_bss.
1554 */
1555 copy_bss(ni, bss);
1556 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid);
1557 ieee80211_node_set_chan(ni, bss->ni_chan);
1558 }
1559 return ni;
1560 }
1561
1562 /*
1563 * Create a bss node for a legacy WDS vap. The far end does
1564 * not associate so we just create create a new node and
1565 * simulate an association. The caller is responsible for
1566 * installing the node as the bss node and handling any further
1567 * setup work like authorizing the port.
1568 */
1569 struct ieee80211_node *
ieee80211_node_create_wds(struct ieee80211vap * vap,const uint8_t bssid[IEEE80211_ADDR_LEN],struct ieee80211_channel * chan)1570 ieee80211_node_create_wds(struct ieee80211vap *vap,
1571 const uint8_t bssid[IEEE80211_ADDR_LEN], struct ieee80211_channel *chan)
1572 {
1573 struct ieee80211com *ic = vap->iv_ic;
1574 struct ieee80211_node *ni;
1575
1576 /* XXX check if node already in sta table? */
1577 ni = ieee80211_alloc_node(&ic->ic_sta, vap, bssid, __func__, __LINE__);
1578 if (ni != NULL) {
1579 ni->ni_wdsvap = vap;
1580 IEEE80211_ADDR_COPY(ni->ni_bssid, bssid);
1581 /*
1582 * Inherit any manually configured settings.
1583 */
1584 copy_bss(ni, vap->iv_bss);
1585 ieee80211_node_set_chan(ni, chan);
1586 /* NB: propagate ssid so available to WPA supplicant */
1587 ni->ni_esslen = vap->iv_des_ssid[0].len;
1588 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen);
1589 /* NB: no associd for peer */
1590 /*
1591 * There are no management frames to use to
1592 * discover neighbor capabilities, so blindly
1593 * propagate the local configuration.
1594 */
1595 if (vap->iv_flags & IEEE80211_F_WME)
1596 ni->ni_flags |= IEEE80211_NODE_QOS;
1597 #ifdef IEEE80211_SUPPORT_SUPERG
1598 if (vap->iv_flags & IEEE80211_F_FF)
1599 ni->ni_flags |= IEEE80211_NODE_FF;
1600 #endif
1601 /* XXX VHT */
1602 if ((ic->ic_htcaps & IEEE80211_HTC_HT) &&
1603 (vap->iv_flags_ht & IEEE80211_FHT_HT)) {
1604 /*
1605 * Device is HT-capable and HT is enabled for
1606 * the vap; setup HT operation. On return
1607 * ni_chan will be adjusted to an HT channel.
1608 */
1609 ieee80211_ht_wds_init(ni);
1610 if (vap->iv_vht_flags & IEEE80211_FVHT_VHT) {
1611 printf("%s: TODO: vht_wds_init\n", __func__);
1612 }
1613 } else {
1614 struct ieee80211_channel *c = ni->ni_chan;
1615 /*
1616 * Force a legacy channel to be used.
1617 */
1618 c = ieee80211_find_channel(ic,
1619 c->ic_freq, c->ic_flags &~ IEEE80211_CHAN_HT);
1620 KASSERT(c != NULL, ("no legacy channel, %u/%x",
1621 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags));
1622 ni->ni_chan = c;
1623 }
1624 }
1625 return ni;
1626 }
1627
1628 struct ieee80211_node *
_ieee80211_find_node_locked(struct ieee80211_node_table * nt,const uint8_t macaddr[IEEE80211_ADDR_LEN],const char * func __debrefcnt_used,int line __debrefcnt_used)1629 _ieee80211_find_node_locked(struct ieee80211_node_table *nt,
1630 const uint8_t macaddr[IEEE80211_ADDR_LEN],
1631 const char *func __debrefcnt_used, int line __debrefcnt_used)
1632 {
1633 struct ieee80211_node *ni;
1634 int hash;
1635
1636 IEEE80211_NODE_LOCK_ASSERT(nt);
1637
1638 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr);
1639 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) {
1640 if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) {
1641 ieee80211_ref_node(ni); /* mark referenced */
1642 #ifdef IEEE80211_DEBUG_REFCNT
1643 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1644 "%s (%s:%u) %p<%s> refcnt %d\n", __func__,
1645 func, line,
1646 ni, ether_sprintf(ni->ni_macaddr),
1647 ieee80211_node_refcnt(ni));
1648 #endif
1649 return ni;
1650 }
1651 }
1652 return NULL;
1653 }
1654
1655 struct ieee80211_node *
_ieee80211_find_node(struct ieee80211_node_table * nt,const uint8_t macaddr[IEEE80211_ADDR_LEN],const char * func __debrefcnt_used,int line __debrefcnt_used)1656 _ieee80211_find_node(struct ieee80211_node_table *nt,
1657 const uint8_t macaddr[IEEE80211_ADDR_LEN],
1658 const char *func __debrefcnt_used, int line __debrefcnt_used)
1659 {
1660 struct ieee80211_node *ni;
1661
1662 IEEE80211_NODE_LOCK(nt);
1663 ni = _ieee80211_find_node_locked(nt, macaddr, func, line);
1664 IEEE80211_NODE_UNLOCK(nt);
1665 return ni;
1666 }
1667
1668 struct ieee80211_node *
_ieee80211_find_vap_node_locked(struct ieee80211_node_table * nt,const struct ieee80211vap * vap,const uint8_t macaddr[IEEE80211_ADDR_LEN],const char * func __debrefcnt_used,int line __debrefcnt_used)1669 _ieee80211_find_vap_node_locked(struct ieee80211_node_table *nt,
1670 const struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN],
1671 const char *func __debrefcnt_used, int line __debrefcnt_used)
1672 {
1673 struct ieee80211_node *ni;
1674 int hash;
1675
1676 IEEE80211_NODE_LOCK_ASSERT(nt);
1677
1678 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr);
1679 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) {
1680 if (ni->ni_vap == vap &&
1681 IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) {
1682 ieee80211_ref_node(ni); /* mark referenced */
1683 #ifdef IEEE80211_DEBUG_REFCNT
1684 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1685 "%s (%s:%u) %p<%s> refcnt %d\n", __func__,
1686 func, line,
1687 ni, ether_sprintf(ni->ni_macaddr),
1688 ieee80211_node_refcnt(ni));
1689 #endif
1690 return ni;
1691 }
1692 }
1693 return NULL;
1694 }
1695
1696 struct ieee80211_node *
_ieee80211_find_vap_node(struct ieee80211_node_table * nt,const struct ieee80211vap * vap,const uint8_t macaddr[IEEE80211_ADDR_LEN],const char * func __debrefcnt_used,int line __debrefcnt_used)1697 _ieee80211_find_vap_node(struct ieee80211_node_table *nt,
1698 const struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN],
1699 const char *func __debrefcnt_used, int line __debrefcnt_used)
1700 {
1701 struct ieee80211_node *ni;
1702
1703 IEEE80211_NODE_LOCK(nt);
1704 ni = _ieee80211_find_vap_node_locked(nt, vap, macaddr, func, line);
1705 IEEE80211_NODE_UNLOCK(nt);
1706 return ni;
1707 }
1708
1709 /*
1710 * Fake up a node; this handles node discovery in adhoc mode.
1711 * Note that for the driver's benefit we treat this like
1712 * an association so the driver has an opportunity to setup
1713 * it's private state.
1714 */
1715 struct ieee80211_node *
ieee80211_fakeup_adhoc_node(struct ieee80211vap * vap,const uint8_t macaddr[IEEE80211_ADDR_LEN])1716 ieee80211_fakeup_adhoc_node(struct ieee80211vap *vap,
1717 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1718 {
1719 struct ieee80211_node *ni;
1720
1721 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE | IEEE80211_MSG_ASSOC,
1722 "%s: mac<%s>\n", __func__, ether_sprintf(macaddr));
1723 ni = ieee80211_dup_bss(vap, macaddr);
1724 if (ni != NULL) {
1725 struct ieee80211com *ic = vap->iv_ic;
1726
1727 /* XXX no rate negotiation; just dup */
1728 ni->ni_rates = vap->iv_bss->ni_rates;
1729 if (ieee80211_iserp_rateset(&ni->ni_rates))
1730 ni->ni_flags |= IEEE80211_NODE_ERP;
1731 if (vap->iv_opmode == IEEE80211_M_AHDEMO) {
1732 /*
1733 * In adhoc demo mode there are no management
1734 * frames to use to discover neighbor capabilities,
1735 * so blindly propagate the local configuration
1736 * so we can do interesting things (e.g. use
1737 * WME to disable ACK's).
1738 */
1739 /*
1740 * XXX TODO: 11n?
1741 */
1742 if (vap->iv_flags & IEEE80211_F_WME)
1743 ni->ni_flags |= IEEE80211_NODE_QOS;
1744 #ifdef IEEE80211_SUPPORT_SUPERG
1745 if (vap->iv_flags & IEEE80211_F_FF)
1746 ni->ni_flags |= IEEE80211_NODE_FF;
1747 #endif
1748 }
1749 ieee80211_node_setuptxparms(ni);
1750 ieee80211_ratectl_node_init(ni);
1751
1752 /*
1753 * XXX TODO: 11n? At least 20MHz, at least A-MPDU RX,
1754 * not A-MPDU TX; not 11n rates, etc. We'll cycle
1755 * that after we hear that we can indeed do 11n
1756 * (either by a beacon frame or by a probe response.)
1757 */
1758
1759 /*
1760 * This is the first time we see the node.
1761 */
1762 if (ic->ic_newassoc != NULL)
1763 ic->ic_newassoc(ni, 1);
1764
1765 /*
1766 * Kick off a probe request to the given node;
1767 * we will then use the probe response to update
1768 * 11n/etc configuration state.
1769 *
1770 * XXX TODO: this isn't guaranteed, and until we get
1771 * a probe response, we won't be able to actually
1772 * do anything 802.11n related to the node.
1773 * So if this does indeed work, maybe we should hold
1774 * off on sending responses until we get the probe
1775 * response, or just default to some sensible subset
1776 * of 802.11n behaviour (eg always allow aggregation
1777 * negotiation TO us, but not FROM us, etc) so we
1778 * aren't entirely busted.
1779 */
1780 if (vap->iv_opmode == IEEE80211_M_IBSS) {
1781 ieee80211_send_probereq(ni, /* node */
1782 vap->iv_myaddr, /* SA */
1783 ni->ni_macaddr, /* DA */
1784 vap->iv_bss->ni_bssid, /* BSSID */
1785 vap->iv_bss->ni_essid,
1786 vap->iv_bss->ni_esslen); /* SSID */
1787 }
1788
1789 /* XXX not right for 802.1x/WPA */
1790 ieee80211_node_authorize(ni);
1791 }
1792 return ni;
1793 }
1794
1795 void
ieee80211_init_neighbor(struct ieee80211_node * ni,const struct ieee80211_frame * wh,const struct ieee80211_scanparams * sp)1796 ieee80211_init_neighbor(struct ieee80211_node *ni,
1797 const struct ieee80211_frame *wh,
1798 const struct ieee80211_scanparams *sp)
1799 {
1800 int do_ht_setup = 0, do_vht_setup = 0;
1801
1802 ni->ni_esslen = sp->ssid[1];
1803 memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]);
1804 IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3);
1805 memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp));
1806 ni->ni_intval = sp->bintval;
1807 ni->ni_capinfo = sp->capinfo;
1808 ni->ni_chan = ni->ni_ic->ic_curchan;
1809 ni->ni_fhdwell = sp->fhdwell;
1810 ni->ni_fhindex = sp->fhindex;
1811 ni->ni_erp = sp->erp;
1812 ni->ni_timoff = sp->timoff;
1813 #ifdef IEEE80211_SUPPORT_MESH
1814 if (ni->ni_vap->iv_opmode == IEEE80211_M_MBSS)
1815 ieee80211_mesh_init_neighbor(ni, wh, sp);
1816 #endif
1817 if (ieee80211_ies_init(&ni->ni_ies, sp->ies, sp->ies_len)) {
1818 ieee80211_ies_expand(&ni->ni_ies);
1819 if (ni->ni_ies.wme_ie != NULL)
1820 ni->ni_flags |= IEEE80211_NODE_QOS;
1821 else
1822 ni->ni_flags &= ~IEEE80211_NODE_QOS;
1823 #ifdef IEEE80211_SUPPORT_SUPERG
1824 if (ni->ni_ies.ath_ie != NULL)
1825 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie);
1826 #endif
1827 if (ni->ni_ies.htcap_ie != NULL)
1828 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie);
1829 if (ni->ni_ies.htinfo_ie != NULL)
1830 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie);
1831
1832 if (ni->ni_ies.vhtcap_ie != NULL)
1833 ieee80211_parse_vhtcap(ni, ni->ni_ies.vhtcap_ie);
1834 if (ni->ni_ies.vhtopmode_ie != NULL)
1835 ieee80211_parse_vhtopmode(ni, ni->ni_ies.vhtopmode_ie);
1836
1837 if ((ni->ni_ies.htcap_ie != NULL) &&
1838 (ni->ni_ies.htinfo_ie != NULL) &&
1839 (ni->ni_vap->iv_flags_ht & IEEE80211_FHT_HT)) {
1840 do_ht_setup = 1;
1841 }
1842
1843 if ((ni->ni_ies.vhtcap_ie != NULL) &&
1844 (ni->ni_ies.vhtopmode_ie != NULL) &&
1845 (ni->ni_vap->iv_vht_flags & IEEE80211_FVHT_VHT)) {
1846 do_vht_setup = 1;
1847 }
1848 }
1849
1850 /* NB: must be after ni_chan is setup */
1851 ieee80211_setup_rates(ni, sp->rates, sp->xrates,
1852 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE |
1853 IEEE80211_F_DONEGO | IEEE80211_F_DODEL);
1854
1855 /*
1856 * If the neighbor is HT compatible, flip that on.
1857 */
1858 if (do_ht_setup) {
1859 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC,
1860 "%s: doing HT setup\n", __func__);
1861 ieee80211_ht_node_init(ni);
1862 ieee80211_ht_updateparams(ni,
1863 ni->ni_ies.htcap_ie,
1864 ni->ni_ies.htinfo_ie);
1865
1866 if (do_vht_setup) {
1867 if (IEEE80211_IS_CHAN_2GHZ(ni->ni_chan)) {
1868 printf("%s: BSS %6D: 2GHz channel, VHT info; ignoring\n",
1869 __func__,
1870 ni->ni_macaddr,
1871 ":");
1872 } else {
1873 ieee80211_vht_node_init(ni);
1874 ieee80211_vht_updateparams(ni,
1875 ni->ni_ies.vhtcap_ie,
1876 ni->ni_ies.vhtopmode_ie);
1877 ieee80211_setup_vht_rates(ni,
1878 ni->ni_ies.vhtcap_ie,
1879 ni->ni_ies.vhtopmode_ie);
1880 }
1881 }
1882
1883 /*
1884 * Finally do the channel upgrade/change based
1885 * on the HT/VHT configuration.
1886 */
1887 ieee80211_ht_updateparams_final(ni, ni->ni_ies.htcap_ie,
1888 ni->ni_ies.htinfo_ie);
1889 ieee80211_setup_htrates(ni,
1890 ni->ni_ies.htcap_ie,
1891 IEEE80211_F_JOIN | IEEE80211_F_DOBRS);
1892 ieee80211_setup_basic_htrates(ni,
1893 ni->ni_ies.htinfo_ie);
1894
1895 ieee80211_node_setuptxparms(ni);
1896 ieee80211_ratectl_node_init(ni);
1897
1898 /* Reassociate; we're now 11n/11ac */
1899 /*
1900 * XXX TODO: this is the wrong thing to do -
1901 * we're calling it with isnew=1 so the ath(4)
1902 * driver reinitialises the rate tables.
1903 * This "mostly" works for ath(4), but it won't
1904 * be right for firmware devices which allocate
1905 * node states.
1906 *
1907 * So, do we just create a new node and delete
1908 * the old one? Or?
1909 */
1910 if (ni->ni_ic->ic_newassoc)
1911 ni->ni_ic->ic_newassoc(ni, 1);
1912 }
1913 }
1914
1915 /*
1916 * Do node discovery in adhoc mode on receipt of a beacon
1917 * or probe response frame. Note that for the driver's
1918 * benefit we treat this like an association so the
1919 * driver has an opportunity to setup it's private state.
1920 */
1921 struct ieee80211_node *
ieee80211_add_neighbor(struct ieee80211vap * vap,const struct ieee80211_frame * wh,const struct ieee80211_scanparams * sp)1922 ieee80211_add_neighbor(struct ieee80211vap *vap,
1923 const struct ieee80211_frame *wh,
1924 const struct ieee80211_scanparams *sp)
1925 {
1926 struct ieee80211_node *ni;
1927
1928 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC,
1929 "%s: mac<%s>\n", __func__, ether_sprintf(wh->i_addr2));
1930 ni = ieee80211_dup_bss(vap, wh->i_addr2);/* XXX alloc_node? */
1931 if (ni != NULL) {
1932 struct ieee80211com *ic = vap->iv_ic;
1933
1934 ieee80211_init_neighbor(ni, wh, sp);
1935 if (ieee80211_iserp_rateset(&ni->ni_rates))
1936 ni->ni_flags |= IEEE80211_NODE_ERP;
1937 ieee80211_node_setuptxparms(ni);
1938 ieee80211_ratectl_node_init(ni);
1939 if (ic->ic_newassoc != NULL)
1940 ic->ic_newassoc(ni, 1);
1941 /* XXX not right for 802.1x/WPA */
1942 ieee80211_node_authorize(ni);
1943 }
1944 return ni;
1945 }
1946
1947 #define IS_PROBEREQ(wh) \
1948 ((wh->i_fc[0] & (IEEE80211_FC0_TYPE_MASK|IEEE80211_FC0_SUBTYPE_MASK)) \
1949 == (IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ))
1950 #define IS_BCAST_PROBEREQ(wh) \
1951 (IS_PROBEREQ(wh) && IEEE80211_IS_MULTICAST( \
1952 ((const struct ieee80211_frame *)(wh))->i_addr3))
1953
1954 static __inline struct ieee80211_node *
_find_rxnode(struct ieee80211_node_table * nt,const struct ieee80211_frame_min * wh,const char * func __debrefcnt_used,int line __debrefcnt_used)1955 _find_rxnode(struct ieee80211_node_table *nt,
1956 const struct ieee80211_frame_min *wh,
1957 const char *func __debrefcnt_used, int line __debrefcnt_used)
1958 {
1959 if (IS_BCAST_PROBEREQ(wh))
1960 return NULL; /* spam bcast probe req to all vap's */
1961 return _ieee80211_find_node_locked(nt, wh->i_addr2, func, line);
1962 }
1963
1964 /*
1965 * Locate the node for sender, track state, and then pass the
1966 * (referenced) node up to the 802.11 layer for its use. Note
1967 * we can return NULL if the sender is not in the table.
1968 */
1969 struct ieee80211_node *
_ieee80211_find_rxnode(struct ieee80211com * ic,const struct ieee80211_frame_min * wh,const char * func __debrefcnt_used,int line __debrefcnt_used)1970 _ieee80211_find_rxnode(struct ieee80211com *ic,
1971 const struct ieee80211_frame_min *wh,
1972 const char *func __debrefcnt_used, int line __debrefcnt_used)
1973 {
1974 struct ieee80211_node_table *nt;
1975 struct ieee80211_node *ni;
1976
1977 nt = &ic->ic_sta;
1978 IEEE80211_NODE_LOCK(nt);
1979 ni = _find_rxnode(nt, wh, func, line);
1980 IEEE80211_NODE_UNLOCK(nt);
1981
1982 return ni;
1983 }
1984
1985 /*
1986 * Like ieee80211_find_rxnode but use the supplied h/w
1987 * key index as a hint to locate the node in the key
1988 * mapping table. If an entry is present at the key
1989 * index we return it; otherwise do a normal lookup and
1990 * update the mapping table if the station has a unicast
1991 * key assigned to it.
1992 */
1993 struct ieee80211_node *
_ieee80211_find_rxnode_withkey(struct ieee80211com * ic,const struct ieee80211_frame_min * wh,ieee80211_keyix keyix,const char * func __debrefcnt_used,int line __debrefcnt_used)1994 _ieee80211_find_rxnode_withkey(struct ieee80211com *ic,
1995 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix,
1996 const char *func __debrefcnt_used, int line __debrefcnt_used)
1997 {
1998 struct ieee80211_node_table *nt;
1999 struct ieee80211_node *ni;
2000
2001 nt = &ic->ic_sta;
2002 IEEE80211_NODE_LOCK(nt);
2003 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax)
2004 ni = nt->nt_keyixmap[keyix];
2005 else
2006 ni = NULL;
2007 if (ni == NULL) {
2008 ni = _find_rxnode(nt, wh, func, line);
2009 if (ni != NULL && nt->nt_keyixmap != NULL) {
2010 /*
2011 * If the station has a unicast key cache slot
2012 * assigned update the key->node mapping table.
2013 */
2014 keyix = ni->ni_ucastkey.wk_rxkeyix;
2015 /* XXX can keyixmap[keyix] != NULL? */
2016 if (keyix < nt->nt_keyixmax &&
2017 nt->nt_keyixmap[keyix] == NULL) {
2018 IEEE80211_DPRINTF(ni->ni_vap,
2019 IEEE80211_MSG_NODE,
2020 "%s: add key map entry %p<%s> refcnt %d\n",
2021 __func__, ni, ether_sprintf(ni->ni_macaddr),
2022 ieee80211_node_refcnt(ni)+1);
2023 nt->nt_keyixmap[keyix] = ieee80211_ref_node(ni);
2024 }
2025 }
2026 } else {
2027 if (IS_BCAST_PROBEREQ(wh))
2028 ni = NULL; /* spam bcast probe req to all vap's */
2029 else
2030 ieee80211_ref_node(ni);
2031 }
2032 IEEE80211_NODE_UNLOCK(nt);
2033
2034 return ni;
2035 }
2036 #undef IS_BCAST_PROBEREQ
2037 #undef IS_PROBEREQ
2038
2039 /*
2040 * Return a reference to the appropriate node for sending
2041 * a data frame. This handles node discovery in adhoc networks.
2042 */
2043 struct ieee80211_node *
_ieee80211_find_txnode(struct ieee80211vap * vap,const uint8_t macaddr[IEEE80211_ADDR_LEN],const char * func __debrefcnt_used,int line __debrefcnt_used)2044 _ieee80211_find_txnode(struct ieee80211vap *vap,
2045 const uint8_t macaddr[IEEE80211_ADDR_LEN],
2046 const char *func __debrefcnt_used, int line __debrefcnt_used)
2047 {
2048 struct ieee80211_node_table *nt = &vap->iv_ic->ic_sta;
2049 struct ieee80211_node *ni;
2050
2051 /*
2052 * The destination address should be in the node table
2053 * unless this is a multicast/broadcast frame. We can
2054 * also optimize station mode operation, all frames go
2055 * to the bss node.
2056 */
2057 /* XXX can't hold lock across dup_bss 'cuz of recursive locking */
2058 IEEE80211_NODE_LOCK(nt);
2059 if (vap->iv_opmode == IEEE80211_M_STA ||
2060 vap->iv_opmode == IEEE80211_M_WDS ||
2061 IEEE80211_IS_MULTICAST(macaddr))
2062 ni = ieee80211_ref_node(vap->iv_bss);
2063 else
2064 ni = _ieee80211_find_node_locked(nt, macaddr, func, line);
2065 IEEE80211_NODE_UNLOCK(nt);
2066
2067 if (ni == NULL) {
2068 if (vap->iv_opmode == IEEE80211_M_IBSS ||
2069 vap->iv_opmode == IEEE80211_M_AHDEMO) {
2070 /*
2071 * In adhoc mode cons up a node for the destination.
2072 * Note that we need an additional reference for the
2073 * caller to be consistent with
2074 * ieee80211_find_node_locked.
2075 */
2076 /*
2077 * XXX TODO: this doesn't fake up 11n state; we need
2078 * to find another way to get it upgraded.
2079 */
2080 ni = ieee80211_fakeup_adhoc_node(vap, macaddr);
2081 if (ni != NULL)
2082 (void) ieee80211_ref_node(ni);
2083 } else {
2084 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, macaddr,
2085 "no node, discard frame (%s)", __func__);
2086 vap->iv_stats.is_tx_nonode++;
2087 }
2088 }
2089 return ni;
2090 }
2091
2092 struct ieee80211_node *
_ieee80211_ref_node(struct ieee80211_node * ni,const char * func __debrefcnt_used,int line __debrefcnt_used)2093 _ieee80211_ref_node(struct ieee80211_node *ni,
2094 const char *func __debrefcnt_used, int line __debrefcnt_used)
2095 {
2096
2097 #ifdef IEEE80211_DEBUG_REFCNT
2098 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
2099 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni,
2100 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2101 #endif
2102 ieee80211_node_incref(ni);
2103 return (ni);
2104 }
2105
2106 static void
__ieee80211_free_node(struct ieee80211_node * ni)2107 __ieee80211_free_node(struct ieee80211_node *ni)
2108 {
2109 struct ieee80211_node_table *nt = ni->ni_table;
2110
2111 /*
2112 * NB: careful about referencing the vap as it may be
2113 * gone if the last reference was held by a driver.
2114 * We know the com will always be present so it's safe
2115 * to use ni_ic below to reclaim resources.
2116 */
2117 #if 0
2118 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2119 "%s %p<%s> in %s table\n", __func__, ni,
2120 ether_sprintf(ni->ni_macaddr),
2121 nt != NULL ? nt->nt_name : "<gone>");
2122 #endif
2123 if (ni->ni_associd != 0) {
2124 struct ieee80211vap *vap = ni->ni_vap;
2125 if (vap->iv_aid_bitmap != NULL)
2126 IEEE80211_AID_CLR(vap, ni->ni_associd);
2127 }
2128 if (nt != NULL)
2129 ieee80211_del_node_nt(nt, ni);
2130 ni->ni_ic->ic_node_free(ni);
2131 }
2132
2133 /*
2134 * Clear any entry in the unicast key mapping table.
2135 */
2136 static int
node_clear_keyixmap(struct ieee80211_node_table * nt,struct ieee80211_node * ni)2137 node_clear_keyixmap(struct ieee80211_node_table *nt, struct ieee80211_node *ni)
2138 {
2139 ieee80211_keyix keyix;
2140
2141 keyix = ni->ni_ucastkey.wk_rxkeyix;
2142 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax &&
2143 nt->nt_keyixmap[keyix] == ni) {
2144 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
2145 "%s: %p<%s> clear key map entry %u\n",
2146 __func__, ni, ether_sprintf(ni->ni_macaddr), keyix);
2147 nt->nt_keyixmap[keyix] = NULL;
2148 ieee80211_node_decref(ni);
2149 return 1;
2150 }
2151
2152 return 0;
2153 }
2154
2155 void
_ieee80211_free_node(struct ieee80211_node * ni,const char * func __debrefcnt_used,int line __debrefcnt_used)2156 _ieee80211_free_node(struct ieee80211_node *ni,
2157 const char *func __debrefcnt_used, int line __debrefcnt_used)
2158 {
2159 struct ieee80211_node_table *nt = ni->ni_table;
2160
2161 #ifdef IEEE80211_DEBUG_REFCNT
2162 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
2163 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni,
2164 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1);
2165 #endif
2166 if (nt != NULL) {
2167 IEEE80211_NODE_LOCK(nt);
2168 if (ieee80211_node_dectestref(ni)) {
2169 /*
2170 * Last reference, reclaim state.
2171 */
2172 __ieee80211_free_node(ni);
2173 } else if (ieee80211_node_refcnt(ni) == 1)
2174 if (node_clear_keyixmap(nt, ni))
2175 __ieee80211_free_node(ni);
2176 IEEE80211_NODE_UNLOCK(nt);
2177 } else {
2178 if (ieee80211_node_dectestref(ni))
2179 __ieee80211_free_node(ni);
2180 }
2181 }
2182
2183 /*
2184 * Reclaim a unicast key and clear any key cache state.
2185 */
2186 int
ieee80211_node_delucastkey(struct ieee80211_node * ni)2187 ieee80211_node_delucastkey(struct ieee80211_node *ni)
2188 {
2189 struct ieee80211com *ic = ni->ni_ic;
2190 struct ieee80211_node_table *nt = &ic->ic_sta;
2191 struct ieee80211_node *nikey;
2192 ieee80211_keyix keyix;
2193 int isowned, status;
2194
2195 /*
2196 * NB: We must beware of LOR here; deleting the key
2197 * can cause the crypto layer to block traffic updates
2198 * which can generate a LOR against the node table lock;
2199 * grab it here and stash the key index for our use below.
2200 *
2201 * Must also beware of recursion on the node table lock.
2202 * When called from node_cleanup we may already have
2203 * the node table lock held. Unfortunately there's no
2204 * way to separate out this path so we must do this
2205 * conditionally.
2206 */
2207 isowned = IEEE80211_NODE_IS_LOCKED(nt);
2208 if (!isowned)
2209 IEEE80211_NODE_LOCK(nt);
2210 nikey = NULL;
2211 status = 1; /* NB: success */
2212 if (ni->ni_ucastkey.wk_keyix != IEEE80211_KEYIX_NONE) {
2213 keyix = ni->ni_ucastkey.wk_rxkeyix;
2214 status = ieee80211_crypto_delkey(ni->ni_vap, &ni->ni_ucastkey);
2215 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) {
2216 nikey = nt->nt_keyixmap[keyix];
2217 nt->nt_keyixmap[keyix] = NULL;
2218 }
2219 }
2220 if (!isowned)
2221 IEEE80211_NODE_UNLOCK(nt);
2222
2223 if (nikey != NULL) {
2224 KASSERT(nikey == ni,
2225 ("key map out of sync, ni %p nikey %p", ni, nikey));
2226 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
2227 "%s: delete key map entry %p<%s> refcnt %d\n",
2228 __func__, ni, ether_sprintf(ni->ni_macaddr),
2229 ieee80211_node_refcnt(ni)-1);
2230 ieee80211_free_node(ni);
2231 }
2232 return status;
2233 }
2234
2235 /*
2236 * Reclaim a node. If this is the last reference count then
2237 * do the normal free work. Otherwise remove it from the node
2238 * table and mark it gone by clearing the back-reference.
2239 */
2240 static void
node_reclaim(struct ieee80211_node_table * nt,struct ieee80211_node * ni)2241 node_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni)
2242 {
2243
2244 IEEE80211_NODE_LOCK_ASSERT(nt);
2245
2246 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
2247 "%s: remove %p<%s> from %s table, refcnt %d\n",
2248 __func__, ni, ether_sprintf(ni->ni_macaddr),
2249 nt->nt_name, ieee80211_node_refcnt(ni)-1);
2250 /*
2251 * Clear any entry in the unicast key mapping table.
2252 * We need to do it here so rx lookups don't find it
2253 * in the mapping table even if it's not in the hash
2254 * table. We cannot depend on the mapping table entry
2255 * being cleared because the node may not be free'd.
2256 */
2257 (void)node_clear_keyixmap(nt, ni);
2258 if (!ieee80211_node_dectestref(ni)) {
2259 /*
2260 * Other references are present, just remove the
2261 * node from the table so it cannot be found. When
2262 * the references are dropped storage will be
2263 * reclaimed.
2264 */
2265 ieee80211_del_node_nt(nt, ni);
2266 } else
2267 __ieee80211_free_node(ni);
2268 }
2269
2270 /*
2271 * Node table support.
2272 */
2273
2274 static void
ieee80211_node_table_init(struct ieee80211com * ic,struct ieee80211_node_table * nt,const char * name,int inact,int keyixmax)2275 ieee80211_node_table_init(struct ieee80211com *ic,
2276 struct ieee80211_node_table *nt,
2277 const char *name, int inact, int keyixmax)
2278 {
2279
2280 nt->nt_ic = ic;
2281 IEEE80211_NODE_LOCK_INIT(nt, ic->ic_name);
2282 TAILQ_INIT(&nt->nt_node);
2283 nt->nt_count = 0;
2284 nt->nt_name = name;
2285 nt->nt_inact_init = inact;
2286 nt->nt_keyixmax = keyixmax;
2287 if (nt->nt_keyixmax > 0) {
2288 nt->nt_keyixmap = (struct ieee80211_node **) IEEE80211_MALLOC(
2289 keyixmax * sizeof(struct ieee80211_node *),
2290 M_80211_NODE,
2291 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
2292 if (nt->nt_keyixmap == NULL)
2293 ic_printf(ic,
2294 "Cannot allocate key index map with %u entries\n",
2295 keyixmax);
2296 } else
2297 nt->nt_keyixmap = NULL;
2298 }
2299
2300 static void
ieee80211_node_table_reset(struct ieee80211_node_table * nt,struct ieee80211vap * match)2301 ieee80211_node_table_reset(struct ieee80211_node_table *nt,
2302 struct ieee80211vap *match)
2303 {
2304 struct ieee80211_node *ni, *next;
2305
2306 IEEE80211_NODE_LOCK(nt);
2307 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) {
2308 if (match != NULL && ni->ni_vap != match)
2309 continue;
2310 /* XXX can this happen? if so need's work */
2311 if (ni->ni_associd != 0) {
2312 struct ieee80211vap *vap = ni->ni_vap;
2313
2314 if (vap->iv_auth->ia_node_leave != NULL)
2315 vap->iv_auth->ia_node_leave(ni);
2316 if (vap->iv_aid_bitmap != NULL)
2317 IEEE80211_AID_CLR(vap, ni->ni_associd);
2318 }
2319 ni->ni_wdsvap = NULL; /* clear reference */
2320 node_reclaim(nt, ni);
2321 }
2322 if (match != NULL && match->iv_opmode == IEEE80211_M_WDS) {
2323 /*
2324 * Make a separate pass to clear references to this vap
2325 * held by DWDS entries. They will not be matched above
2326 * because ni_vap will point to the ap vap but we still
2327 * need to clear ni_wdsvap when the WDS vap is destroyed
2328 * and/or reset.
2329 */
2330 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next)
2331 if (ni->ni_wdsvap == match)
2332 ni->ni_wdsvap = NULL;
2333 }
2334 IEEE80211_NODE_UNLOCK(nt);
2335 }
2336
2337 static void
ieee80211_node_table_cleanup(struct ieee80211_node_table * nt)2338 ieee80211_node_table_cleanup(struct ieee80211_node_table *nt)
2339 {
2340 ieee80211_node_table_reset(nt, NULL);
2341 if (nt->nt_keyixmap != NULL) {
2342 #ifdef DIAGNOSTIC
2343 /* XXX verify all entries are NULL */
2344 int i;
2345 for (i = 0; i < nt->nt_keyixmax; i++)
2346 if (nt->nt_keyixmap[i] != NULL)
2347 printf("%s: %s[%u] still active\n", __func__,
2348 nt->nt_name, i);
2349 #endif
2350 IEEE80211_FREE(nt->nt_keyixmap, M_80211_NODE);
2351 nt->nt_keyixmap = NULL;
2352 }
2353 IEEE80211_NODE_LOCK_DESTROY(nt);
2354 }
2355
2356 static void
timeout_stations(void * arg __unused,struct ieee80211_node * ni)2357 timeout_stations(void *arg __unused, struct ieee80211_node *ni)
2358 {
2359 struct ieee80211com *ic = ni->ni_ic;
2360 struct ieee80211vap *vap = ni->ni_vap;
2361
2362 /*
2363 * Only process stations when in RUN state. This
2364 * insures, for example, that we don't timeout an
2365 * inactive station during CAC. Note that CSA state
2366 * is actually handled in ieee80211_node_timeout as
2367 * it applies to more than timeout processing.
2368 */
2369 if (vap->iv_state != IEEE80211_S_RUN)
2370 return;
2371 /*
2372 * Ignore entries for which have yet to receive an
2373 * authentication frame. These are transient and
2374 * will be reclaimed when the last reference to them
2375 * goes away (when frame xmits complete).
2376 */
2377 if ((vap->iv_opmode == IEEE80211_M_HOSTAP ||
2378 vap->iv_opmode == IEEE80211_M_STA) &&
2379 (ni->ni_flags & IEEE80211_NODE_AREF) == 0)
2380 return;
2381 /*
2382 * Free fragment if not needed anymore
2383 * (last fragment older than 1s).
2384 * XXX doesn't belong here, move to node_age
2385 */
2386 if (ni->ni_rxfrag[0] != NULL &&
2387 ticks > ni->ni_rxfragstamp + hz) {
2388 m_freem(ni->ni_rxfrag[0]);
2389 ni->ni_rxfrag[0] = NULL;
2390 }
2391 if (ni->ni_inact > 0) {
2392 ni->ni_inact--;
2393 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni,
2394 "%s: inact %u inact_reload %u nrates %u",
2395 __func__, ni->ni_inact, ni->ni_inact_reload,
2396 ni->ni_rates.rs_nrates);
2397 }
2398 /*
2399 * Special case ourself; we may be idle for extended periods
2400 * of time and regardless reclaiming our state is wrong.
2401 * XXX run ic_node_age
2402 */
2403 /* XXX before inact decrement? */
2404 if (ni == vap->iv_bss)
2405 return;
2406 if (ni->ni_associd != 0 ||
2407 (vap->iv_opmode == IEEE80211_M_IBSS ||
2408 vap->iv_opmode == IEEE80211_M_AHDEMO)) {
2409 /*
2410 * Age/drain resources held by the station.
2411 */
2412 ic->ic_node_age(ni);
2413 /*
2414 * Probe the station before time it out. We
2415 * send a null data frame which may not be
2416 * universally supported by drivers (need it
2417 * for ps-poll support so it should be...).
2418 *
2419 * XXX don't probe the station unless we've
2420 * received a frame from them (and have
2421 * some idea of the rates they are capable
2422 * of); this will get fixed more properly
2423 * soon with better handling of the rate set.
2424 */
2425 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) &&
2426 (0 < ni->ni_inact &&
2427 ni->ni_inact <= vap->iv_inact_probe) &&
2428 ni->ni_rates.rs_nrates != 0) {
2429 IEEE80211_NOTE(vap,
2430 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE,
2431 ni, "%s",
2432 "probe station due to inactivity");
2433 /*
2434 * Grab a reference so the node cannot
2435 * be reclaimed before we send the frame.
2436 * ieee80211_send_nulldata understands
2437 * we've done this and reclaims the
2438 * ref for us as needed.
2439 */
2440 /* XXX fix this (not required anymore). */
2441 ieee80211_ref_node(ni);
2442 /* XXX useless */
2443 ieee80211_send_nulldata(ni);
2444 /* XXX stat? */
2445 return;
2446 }
2447 }
2448 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) &&
2449 ni->ni_inact <= 0) {
2450 IEEE80211_NOTE(vap,
2451 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, ni,
2452 "station timed out due to inactivity "
2453 "(refcnt %u)", ieee80211_node_refcnt(ni));
2454 /*
2455 * Send a deauthenticate frame and drop the station.
2456 * This is somewhat complicated due to reference counts
2457 * and locking. At this point a station will typically
2458 * have a reference count of 2. ieee80211_node_leave
2459 * will do a "free" of the node which will drop the
2460 * reference count. But in the meantime a reference
2461 * wil be held by the deauth frame. The actual reclaim
2462 * of the node will happen either after the tx is
2463 * completed or by ieee80211_node_leave.
2464 */
2465 if (ni->ni_associd != 0) {
2466 IEEE80211_SEND_MGMT(ni,
2467 IEEE80211_FC0_SUBTYPE_DEAUTH,
2468 IEEE80211_REASON_AUTH_EXPIRE);
2469 }
2470 ieee80211_node_leave(ni);
2471 vap->iv_stats.is_node_timeout++;
2472 }
2473 }
2474
2475 /*
2476 * Timeout inactive stations and do related housekeeping.
2477 */
2478 static void
ieee80211_timeout_stations(struct ieee80211com * ic)2479 ieee80211_timeout_stations(struct ieee80211com *ic)
2480 {
2481 struct ieee80211_node_table *nt = &ic->ic_sta;
2482
2483 ieee80211_iterate_nodes(nt, timeout_stations, NULL);
2484 }
2485
2486 /*
2487 * Aggressively reclaim resources. This should be used
2488 * only in a critical situation to reclaim mbuf resources.
2489 */
2490 void
ieee80211_drain(struct ieee80211com * ic)2491 ieee80211_drain(struct ieee80211com *ic)
2492 {
2493 struct ieee80211_node_table *nt = &ic->ic_sta;
2494 struct ieee80211vap *vap;
2495 struct ieee80211_node *ni;
2496
2497 IEEE80211_NODE_LOCK(nt);
2498 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) {
2499 /*
2500 * Ignore entries for which have yet to receive an
2501 * authentication frame. These are transient and
2502 * will be reclaimed when the last reference to them
2503 * goes away (when frame xmits complete).
2504 */
2505 vap = ni->ni_vap;
2506 /*
2507 * Only process stations when in RUN state. This
2508 * insures, for example, that we don't timeout an
2509 * inactive station during CAC. Note that CSA state
2510 * is actually handled in ieee80211_node_timeout as
2511 * it applies to more than timeout processing.
2512 */
2513 if (vap->iv_state != IEEE80211_S_RUN)
2514 continue;
2515 /* XXX can vap be NULL? */
2516 if ((vap->iv_opmode == IEEE80211_M_HOSTAP ||
2517 vap->iv_opmode == IEEE80211_M_STA) &&
2518 (ni->ni_flags & IEEE80211_NODE_AREF) == 0)
2519 continue;
2520 /*
2521 * Free fragments.
2522 * XXX doesn't belong here, move to node_drain
2523 */
2524 if (ni->ni_rxfrag[0] != NULL) {
2525 m_freem(ni->ni_rxfrag[0]);
2526 ni->ni_rxfrag[0] = NULL;
2527 }
2528 /*
2529 * Drain resources held by the station.
2530 */
2531 ic->ic_node_drain(ni);
2532 }
2533 IEEE80211_NODE_UNLOCK(nt);
2534 }
2535
2536 /*
2537 * Per-ieee80211vap inactivity timer callback.
2538 */
2539 static void
ieee80211_vap_timeout(struct ieee80211vap * vap)2540 ieee80211_vap_timeout(struct ieee80211vap *vap)
2541 {
2542
2543 IEEE80211_LOCK_ASSERT(vap->iv_ic);
2544
2545 ieee80211_vap_erp_timeout(vap);
2546 ieee80211_ht_timeout(vap);
2547 ieee80211_vht_timeout(vap);
2548 }
2549
2550 /*
2551 * Per-ieee80211com inactivity timer callback.
2552 */
2553 void
ieee80211_node_timeout(void * arg)2554 ieee80211_node_timeout(void *arg)
2555 {
2556 struct ieee80211com *ic = arg;
2557 struct ieee80211vap *vap;
2558
2559 /*
2560 * Defer timeout processing if a channel switch is pending.
2561 * We typically need to be mute so not doing things that
2562 * might generate frames is good to handle in one place.
2563 * Suppressing the station timeout processing may extend the
2564 * lifetime of inactive stations (by not decrementing their
2565 * idle counters) but this should be ok unless the CSA is
2566 * active for an unusually long time.
2567 */
2568 if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) {
2569 ieee80211_scan_timeout(ic);
2570 ieee80211_timeout_stations(ic);
2571 ieee80211_ageq_age(&ic->ic_stageq, IEEE80211_INACT_WAIT);
2572
2573 IEEE80211_LOCK(ic);
2574 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
2575 ieee80211_vap_timeout(vap);
2576 IEEE80211_UNLOCK(ic);
2577 }
2578 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz,
2579 ieee80211_node_timeout, ic);
2580 }
2581
2582 /*
2583 * The same as ieee80211_iterate_nodes(), but for one vap only.
2584 */
2585 int
ieee80211_iterate_nodes_vap(struct ieee80211_node_table * nt,struct ieee80211vap * vap,ieee80211_iter_func * f,void * arg)2586 ieee80211_iterate_nodes_vap(struct ieee80211_node_table *nt,
2587 struct ieee80211vap *vap, ieee80211_iter_func *f, void *arg)
2588 {
2589 struct ieee80211_node **ni_arr;
2590 struct ieee80211_node *ni;
2591 size_t size;
2592 int count, i;
2593
2594 /*
2595 * Iterate over the node table and save an array of ref'ed nodes.
2596 *
2597 * This is separated out from calling the actual node function so that
2598 * no LORs will occur.
2599 */
2600 IEEE80211_NODE_LOCK(nt);
2601 count = nt->nt_count;
2602 size = count * sizeof(struct ieee80211_node *);
2603 ni_arr = (struct ieee80211_node **) IEEE80211_MALLOC(size, M_80211_NODE,
2604 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
2605 if (ni_arr == NULL) {
2606 IEEE80211_NODE_UNLOCK(nt);
2607 return (ENOMEM);
2608 }
2609
2610 i = 0;
2611 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) {
2612 if (vap != NULL && ni->ni_vap != vap)
2613 continue;
2614 KASSERT(i < count,
2615 ("node array overflow (vap %p, i %d, count %d)\n",
2616 vap, i, count));
2617 ni_arr[i] = ieee80211_ref_node(ni);
2618 i++;
2619 }
2620 IEEE80211_NODE_UNLOCK(nt);
2621
2622 for (i = 0; i < count; i++) {
2623 if (ni_arr[i] == NULL) /* end of the list */
2624 break;
2625 (*f)(arg, ni_arr[i]);
2626 /* ieee80211_free_node() locks by itself */
2627 ieee80211_free_node(ni_arr[i]);
2628 }
2629
2630 IEEE80211_FREE(ni_arr, M_80211_NODE);
2631
2632 return (0);
2633 }
2634
2635 /*
2636 * Just a wrapper, so we don't have to change every ieee80211_iterate_nodes()
2637 * reference in the source.
2638 */
2639 void
ieee80211_iterate_nodes(struct ieee80211_node_table * nt,ieee80211_iter_func * f,void * arg)2640 ieee80211_iterate_nodes(struct ieee80211_node_table *nt,
2641 ieee80211_iter_func *f, void *arg)
2642 {
2643 /* XXX no way to pass error to the caller. */
2644 (void) ieee80211_iterate_nodes_vap(nt, NULL, f, arg);
2645 }
2646
2647 void
ieee80211_dump_node(struct ieee80211_node_table * nt __unused,struct ieee80211_node * ni)2648 ieee80211_dump_node(struct ieee80211_node_table *nt __unused,
2649 struct ieee80211_node *ni)
2650 {
2651 printf("%p: mac %s refcnt %d\n", ni,
2652 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni));
2653 printf("\tauthmode %u flags 0x%x\n",
2654 ni->ni_authmode, ni->ni_flags);
2655 printf("\tassocid 0x%x txpower %u vlan %u\n",
2656 ni->ni_associd, ni->ni_txpower, ni->ni_vlan);
2657 printf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n",
2658 ni->ni_txseqs[IEEE80211_NONQOS_TID],
2659 ni->ni_rxseqs[IEEE80211_NONQOS_TID] >> IEEE80211_SEQ_SEQ_SHIFT,
2660 ni->ni_rxseqs[IEEE80211_NONQOS_TID] & IEEE80211_SEQ_FRAG_MASK,
2661 ni->ni_rxfragstamp);
2662 printf("\trssi %d noise %d intval %u capinfo 0x%x\n",
2663 node_getrssi(ni), ni->ni_noise,
2664 ni->ni_intval, ni->ni_capinfo);
2665 printf("\tbssid %s essid \"%.*s\" channel %u:0x%x\n",
2666 ether_sprintf(ni->ni_bssid),
2667 ni->ni_esslen, ni->ni_essid,
2668 (ni->ni_chan != IEEE80211_CHAN_ANYC) ? ni->ni_chan->ic_freq : 0,
2669 (ni->ni_chan != IEEE80211_CHAN_ANYC) ? ni->ni_chan->ic_flags : 0);
2670 printf("\tinact %u inact_reload %u txrate %u\n",
2671 ni->ni_inact, ni->ni_inact_reload, ni->ni_txrate);
2672 printf("\thtcap %x htparam %x htctlchan %u ht2ndchan %u\n",
2673 ni->ni_htcap, ni->ni_htparam,
2674 ni->ni_htctlchan, ni->ni_ht2ndchan);
2675 printf("\thtopmode %x htstbc %x htchw %u\n",
2676 ni->ni_htopmode, ni->ni_htstbc, ni->ni_chw);
2677 printf("\tvhtcap %x freq1 %d freq2 %d vhtbasicmcs %x\n",
2678 ni->ni_vhtcap, (int) ni->ni_vht_chan1, (int) ni->ni_vht_chan2,
2679 (int) ni->ni_vht_basicmcs);
2680 /* XXX VHT state */
2681 }
2682
2683 void
ieee80211_dump_nodes(struct ieee80211_node_table * nt)2684 ieee80211_dump_nodes(struct ieee80211_node_table *nt)
2685 {
2686 ieee80211_iterate_nodes(nt,
2687 (ieee80211_iter_func *) ieee80211_dump_node, nt);
2688 }
2689
2690 /*
2691 * Iterate over the VAPs and update their ERP beacon IEs.
2692 *
2693 * Note this must be called from the deferred ERP update task paths.
2694 */
2695 void
ieee80211_notify_erp_locked(struct ieee80211com * ic)2696 ieee80211_notify_erp_locked(struct ieee80211com *ic)
2697 {
2698 struct ieee80211vap *vap;
2699
2700 IEEE80211_LOCK_ASSERT(ic);
2701
2702 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
2703 if (vap->iv_opmode == IEEE80211_M_HOSTAP)
2704 ieee80211_beacon_notify(vap, IEEE80211_BEACON_ERP);
2705 }
2706
2707 /*
2708 * Handle a station joining an 11g network.
2709 */
2710 static void
ieee80211_node_join_11g(struct ieee80211_node * ni)2711 ieee80211_node_join_11g(struct ieee80211_node *ni)
2712 {
2713 struct ieee80211com *ic = ni->ni_ic;
2714 struct ieee80211vap *vap = ni->ni_vap;
2715
2716 IEEE80211_LOCK_ASSERT(ic);
2717
2718 /*
2719 * Station isn't capable of short slot time. Bump
2720 * the count of long slot time stations and disable
2721 * use of short slot time. Note that the actual switch
2722 * over to long slot time use may not occur until the
2723 * next beacon transmission (per sec. 7.3.1.4 of 11g).
2724 */
2725 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) {
2726 vap->iv_longslotsta++;
2727 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2728 "station needs long slot time, count %d",
2729 vap->iv_longslotsta);
2730 /*
2731 * XXX TODO: this may need all VAPs checked!
2732 */
2733 if (!IEEE80211_IS_CHAN_108G(ic->ic_bsschan)) {
2734 /*
2735 * Don't force slot time when switched to turbo
2736 * mode as non-ERP stations won't be present; this
2737 * need only be done when on the normal G channel.
2738 */
2739 ieee80211_vap_set_shortslottime(vap, 0);
2740 }
2741 }
2742 /*
2743 * If the new station is not an ERP station
2744 * then bump the counter and enable protection
2745 * if configured.
2746 */
2747 if (!ieee80211_iserp_rateset(&ni->ni_rates)) {
2748 vap->iv_nonerpsta++;
2749 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2750 "station is !ERP, %d non-ERP stations associated",
2751 vap->iv_nonerpsta);
2752 /*
2753 * If station does not support short preamble
2754 * then we must enable use of Barker preamble.
2755 */
2756 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) {
2757 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2758 "%s", "station needs long preamble");
2759 vap->iv_flags |= IEEE80211_F_USEBARKER;
2760 vap->iv_flags &= ~IEEE80211_F_SHPREAMBLE;
2761 ieee80211_vap_update_preamble(vap);
2762 }
2763 /*
2764 * If protection is configured and this is the first
2765 * indication we should use protection, enable it.
2766 */
2767 if (vap->iv_protmode != IEEE80211_PROT_NONE &&
2768 vap->iv_nonerpsta == 1 &&
2769 (vap->iv_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) {
2770 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC,
2771 "%s: enable use of protection\n", __func__);
2772 vap->iv_flags |= IEEE80211_F_USEPROT;
2773 ieee80211_vap_update_erp_protmode(vap);
2774 }
2775 } else
2776 ni->ni_flags |= IEEE80211_NODE_ERP;
2777 }
2778
2779 void
ieee80211_node_join(struct ieee80211_node * ni,int resp)2780 ieee80211_node_join(struct ieee80211_node *ni, int resp)
2781 {
2782 struct ieee80211com *ic = ni->ni_ic;
2783 struct ieee80211vap *vap = ni->ni_vap;
2784 int newassoc;
2785
2786 if (ni->ni_associd == 0) {
2787 uint16_t aid;
2788
2789 KASSERT(vap->iv_aid_bitmap != NULL, ("no aid bitmap"));
2790 /*
2791 * It would be good to search the bitmap
2792 * more efficiently, but this will do for now.
2793 */
2794 for (aid = 1; aid < vap->iv_max_aid; aid++) {
2795 if (!IEEE80211_AID_ISSET(vap, aid))
2796 break;
2797 }
2798 if (aid >= vap->iv_max_aid) {
2799 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_TOOMANY);
2800 ieee80211_node_leave(ni);
2801 return;
2802 }
2803 ni->ni_associd = aid | 0xc000;
2804 ni->ni_jointime = time_uptime;
2805 IEEE80211_LOCK(ic);
2806 IEEE80211_AID_SET(vap, ni->ni_associd);
2807 vap->iv_sta_assoc++;
2808
2809 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan))
2810 ieee80211_ht_node_join(ni);
2811 if (IEEE80211_IS_CHAN_VHT(ic->ic_bsschan))
2812 ieee80211_vht_node_join(ni);
2813 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) &&
2814 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan))
2815 ieee80211_node_join_11g(ni);
2816 IEEE80211_UNLOCK(ic);
2817
2818 newassoc = 1;
2819 } else
2820 newassoc = 0;
2821
2822 /*
2823 * XXX VHT - should log VHT channel width, etc
2824 */
2825 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni,
2826 "station associated at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s%s",
2827 IEEE80211_NODE_AID(ni),
2828 vap->iv_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long",
2829 vap->iv_flags & IEEE80211_F_SHSLOT ? "short" : "long",
2830 vap->iv_flags & IEEE80211_F_USEPROT ? ", protection" : "",
2831 ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "",
2832 /* XXX update for VHT string */
2833 ni->ni_flags & IEEE80211_NODE_HT ?
2834 (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "",
2835 ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "",
2836 ni->ni_flags & IEEE80211_NODE_AMSDU ? " (+AMSDU)" : "",
2837 ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" :
2838 ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "",
2839 ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "",
2840 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ?
2841 ", fast-frames" : "",
2842 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ?
2843 ", turbo" : ""
2844 );
2845
2846 ieee80211_node_setuptxparms(ni);
2847 ieee80211_ratectl_node_init(ni);
2848 /* give driver a chance to setup state like ni_txrate */
2849 if (ic->ic_newassoc != NULL)
2850 ic->ic_newassoc(ni, newassoc);
2851 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_SUCCESS);
2852 /* tell the authenticator about new station */
2853 if (vap->iv_auth->ia_node_join != NULL)
2854 vap->iv_auth->ia_node_join(ni);
2855 ieee80211_notify_node_join(ni,
2856 resp == IEEE80211_FC0_SUBTYPE_ASSOC_RESP);
2857 }
2858
2859 static void
disable_protection(struct ieee80211vap * vap)2860 disable_protection(struct ieee80211vap *vap)
2861 {
2862 struct ieee80211com *ic = vap->iv_ic;
2863
2864 KASSERT(vap->iv_nonerpsta == 0 &&
2865 (vap->iv_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0,
2866 ("%d non ERP stations, flags 0x%x", vap->iv_nonerpsta,
2867 vap->iv_flags_ext));
2868
2869 vap->iv_flags &= ~IEEE80211_F_USEPROT;
2870 /* XXX verify mode? */
2871 if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) {
2872 vap->iv_flags |= IEEE80211_F_SHPREAMBLE;
2873 vap->iv_flags &= ~IEEE80211_F_USEBARKER;
2874 }
2875 ieee80211_vap_update_erp_protmode(vap);
2876 ieee80211_vap_update_preamble(vap);
2877 }
2878
2879 /*
2880 * Handle a station leaving an 11g network.
2881 */
2882 static void
ieee80211_node_leave_11g(struct ieee80211_node * ni)2883 ieee80211_node_leave_11g(struct ieee80211_node *ni)
2884 {
2885 struct ieee80211com *ic = ni->ni_ic;
2886 struct ieee80211vap *vap = ni->ni_vap;
2887
2888 IEEE80211_LOCK_ASSERT(ic);
2889
2890 KASSERT(IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan),
2891 ("not in 11g, bss %u:0x%x", ic->ic_bsschan->ic_freq,
2892 ic->ic_bsschan->ic_flags));
2893
2894 /*
2895 * If a long slot station do the slot time bookkeeping.
2896 */
2897 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) {
2898 KASSERT(vap->iv_longslotsta > 0,
2899 ("bogus long slot station count %d", vap->iv_longslotsta));
2900 vap->iv_longslotsta--;
2901 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2902 "long slot time station leaves, count now %d",
2903 vap->iv_longslotsta);
2904 /*
2905 * XXX TODO: this may need all VAPs checked!
2906 */
2907 if (vap->iv_longslotsta == 0) {
2908 /*
2909 * Re-enable use of short slot time if supported
2910 * and not operating in IBSS mode (per spec).
2911 */
2912 if ((ic->ic_caps & IEEE80211_C_SHSLOT) &&
2913 ic->ic_opmode != IEEE80211_M_IBSS) {
2914 IEEE80211_DPRINTF(ni->ni_vap,
2915 IEEE80211_MSG_ASSOC,
2916 "%s: re-enable use of short slot time\n",
2917 __func__);
2918 ieee80211_vap_set_shortslottime(vap, 1);
2919 }
2920 }
2921 }
2922 /*
2923 * If a non-ERP station do the protection-related bookkeeping.
2924 */
2925 if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) {
2926 KASSERT(vap->iv_nonerpsta > 0,
2927 ("bogus non-ERP station count %d", vap->iv_nonerpsta));
2928 vap->iv_nonerpsta--;
2929 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2930 "non-ERP station leaves, count now %d%s", vap->iv_nonerpsta,
2931 (vap->iv_flags_ext & IEEE80211_FEXT_NONERP_PR) ?
2932 " (non-ERP sta present)" : "");
2933 if (vap->iv_nonerpsta == 0 &&
2934 (vap->iv_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) {
2935 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC,
2936 "%s: disable use of protection\n", __func__);
2937 disable_protection(vap);
2938 }
2939 }
2940 }
2941
2942 /*
2943 * Time out presence of an overlapping bss with non-ERP
2944 * stations. When operating in hostap mode we listen for
2945 * beacons from other stations and if we identify a non-ERP
2946 * station is present we enable protection. To identify
2947 * when all non-ERP stations are gone we time out this
2948 * condition.
2949 */
2950 static void
ieee80211_vap_erp_timeout(struct ieee80211vap * vap)2951 ieee80211_vap_erp_timeout(struct ieee80211vap *vap)
2952 {
2953
2954 IEEE80211_LOCK_ASSERT(vap->iv_ic);
2955
2956 if ((vap->iv_flags_ext & IEEE80211_FEXT_NONERP_PR) &&
2957 ieee80211_time_after(ticks, vap->iv_lastnonerp + IEEE80211_NONERP_PRESENT_AGE)) {
2958 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC,
2959 "%s", "age out non-ERP sta present on channel");
2960 vap->iv_flags_ext &= ~IEEE80211_FEXT_NONERP_PR;
2961 if (vap->iv_nonerpsta == 0)
2962 disable_protection(vap);
2963 }
2964 }
2965
2966 /*
2967 * Handle bookkeeping for station deauthentication/disassociation
2968 * when operating as an ap.
2969 */
2970 void
ieee80211_node_leave(struct ieee80211_node * ni)2971 ieee80211_node_leave(struct ieee80211_node *ni)
2972 {
2973 struct ieee80211com *ic = ni->ni_ic;
2974 struct ieee80211vap *vap = ni->ni_vap;
2975 struct ieee80211_node_table *nt = ni->ni_table;
2976
2977 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni,
2978 "station with aid %d leaves", IEEE80211_NODE_AID(ni));
2979
2980 KASSERT(vap->iv_opmode != IEEE80211_M_STA,
2981 ("unexpected operating mode %u", vap->iv_opmode));
2982 /*
2983 * If node wasn't previously associated all
2984 * we need to do is reclaim the reference.
2985 */
2986 /* XXX ibss mode bypasses 11g and notification */
2987 if (ni->ni_associd == 0)
2988 goto done;
2989 /*
2990 * Tell the authenticator the station is leaving.
2991 * Note that we must do this before yanking the
2992 * association id as the authenticator uses the
2993 * associd to locate it's state block.
2994 */
2995 if (vap->iv_auth->ia_node_leave != NULL)
2996 vap->iv_auth->ia_node_leave(ni);
2997
2998 IEEE80211_LOCK(ic);
2999 IEEE80211_AID_CLR(vap, ni->ni_associd);
3000 vap->iv_sta_assoc--;
3001
3002 if (IEEE80211_IS_CHAN_VHT(ic->ic_bsschan))
3003 ieee80211_vht_node_leave(ni);
3004 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan))
3005 ieee80211_ht_node_leave(ni);
3006 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) &&
3007 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan))
3008 ieee80211_node_leave_11g(ni);
3009 IEEE80211_UNLOCK(ic);
3010 /*
3011 * Cleanup station state. In particular clear various
3012 * state that might otherwise be reused if the node
3013 * is reused before the reference count goes to zero
3014 * (and memory is reclaimed).
3015 */
3016 ieee80211_sta_leave(ni);
3017 done:
3018 /*
3019 * Remove the node from any table it's recorded in and
3020 * drop the caller's reference. Removal from the table
3021 * is important to insure the node is not reprocessed
3022 * for inactivity.
3023 */
3024 if (nt != NULL) {
3025 IEEE80211_NODE_LOCK(nt);
3026 node_reclaim(nt, ni);
3027 IEEE80211_NODE_UNLOCK(nt);
3028 } else
3029 ieee80211_free_node(ni);
3030 }
3031
3032 struct rssiinfo {
3033 int rssi_samples;
3034 uint32_t rssi_total;
3035 };
3036
3037 static void
get_hostap_rssi(void * arg,struct ieee80211_node * ni)3038 get_hostap_rssi(void *arg, struct ieee80211_node *ni)
3039 {
3040 struct rssiinfo *info = arg;
3041 struct ieee80211vap *vap = ni->ni_vap;
3042 int8_t rssi;
3043
3044 /* only associated stations */
3045 if (ni->ni_associd == 0)
3046 return;
3047 rssi = vap->iv_ic->ic_node_getrssi(ni);
3048 if (rssi != 0) {
3049 info->rssi_samples++;
3050 info->rssi_total += rssi;
3051 }
3052 }
3053
3054 static void
get_adhoc_rssi(void * arg,struct ieee80211_node * ni)3055 get_adhoc_rssi(void *arg, struct ieee80211_node *ni)
3056 {
3057 struct rssiinfo *info = arg;
3058 struct ieee80211vap *vap = ni->ni_vap;
3059 int8_t rssi;
3060
3061 /* only neighbors */
3062 /* XXX check bssid */
3063 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0)
3064 return;
3065 rssi = vap->iv_ic->ic_node_getrssi(ni);
3066 if (rssi != 0) {
3067 info->rssi_samples++;
3068 info->rssi_total += rssi;
3069 }
3070 }
3071
3072 #ifdef IEEE80211_SUPPORT_MESH
3073 static void
get_mesh_rssi(void * arg,struct ieee80211_node * ni)3074 get_mesh_rssi(void *arg, struct ieee80211_node *ni)
3075 {
3076 struct rssiinfo *info = arg;
3077 struct ieee80211vap *vap = ni->ni_vap;
3078 int8_t rssi;
3079
3080 /* only neighbors that peered successfully */
3081 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED)
3082 return;
3083 rssi = vap->iv_ic->ic_node_getrssi(ni);
3084 if (rssi != 0) {
3085 info->rssi_samples++;
3086 info->rssi_total += rssi;
3087 }
3088 }
3089 #endif /* IEEE80211_SUPPORT_MESH */
3090
3091 int8_t
ieee80211_getrssi(struct ieee80211vap * vap)3092 ieee80211_getrssi(struct ieee80211vap *vap)
3093 {
3094 #define NZ(x) ((x) == 0 ? 1 : (x))
3095 struct ieee80211com *ic = vap->iv_ic;
3096 struct rssiinfo info;
3097
3098 info.rssi_total = 0;
3099 info.rssi_samples = 0;
3100 switch (vap->iv_opmode) {
3101 case IEEE80211_M_IBSS: /* average of all ibss neighbors */
3102 case IEEE80211_M_AHDEMO: /* average of all neighbors */
3103 ieee80211_iterate_nodes_vap(&ic->ic_sta, vap, get_adhoc_rssi,
3104 &info);
3105 break;
3106 case IEEE80211_M_HOSTAP: /* average of all associated stations */
3107 ieee80211_iterate_nodes_vap(&ic->ic_sta, vap, get_hostap_rssi,
3108 &info);
3109 break;
3110 #ifdef IEEE80211_SUPPORT_MESH
3111 case IEEE80211_M_MBSS: /* average of all mesh neighbors */
3112 ieee80211_iterate_nodes_vap(&ic->ic_sta, vap, get_mesh_rssi,
3113 &info);
3114 break;
3115 #endif
3116 case IEEE80211_M_MONITOR: /* XXX */
3117 case IEEE80211_M_STA: /* use stats from associated ap */
3118 default:
3119 if (vap->iv_bss != NULL)
3120 info.rssi_total = ic->ic_node_getrssi(vap->iv_bss);
3121 info.rssi_samples = 1;
3122 break;
3123 }
3124 return info.rssi_total / NZ(info.rssi_samples);
3125 #undef NZ
3126 }
3127
3128 void
ieee80211_getsignal(struct ieee80211vap * vap,int8_t * rssi,int8_t * noise)3129 ieee80211_getsignal(struct ieee80211vap *vap, int8_t *rssi, int8_t *noise)
3130 {
3131
3132 if (vap->iv_bss == NULL) /* NB: shouldn't happen */
3133 return;
3134 vap->iv_ic->ic_node_getsignal(vap->iv_bss, rssi, noise);
3135 /* for non-station mode return avg'd rssi accounting */
3136 if (vap->iv_opmode != IEEE80211_M_STA)
3137 *rssi = ieee80211_getrssi(vap);
3138 }
3139