1 /*-
2 * Copyright (c) 2001 Atsushi Onoe
3 * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD: releng/11.2/sys/net80211/ieee80211_node.c 330458 2018-03-05 08:18:13Z eadler $");
29
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
57 #include <net/bpf.h>
58
59 /*
60 * IEEE80211_NODE_HASHSIZE must be a power of 2.
61 */
62 CTASSERT((IEEE80211_NODE_HASHSIZE & (IEEE80211_NODE_HASHSIZE-1)) == 0);
63
64 /*
65 * Association id's are managed with a bit vector.
66 */
67 #define IEEE80211_AID_SET(_vap, b) \
68 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] |= \
69 (1 << (IEEE80211_AID(b) % 32)))
70 #define IEEE80211_AID_CLR(_vap, b) \
71 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] &= \
72 ~(1 << (IEEE80211_AID(b) % 32)))
73 #define IEEE80211_AID_ISSET(_vap, b) \
74 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] & (1 << (IEEE80211_AID(b) % 32)))
75
76 static int ieee80211_sta_join1(struct ieee80211_node *);
77
78 static struct ieee80211_node *node_alloc(struct ieee80211vap *,
79 const uint8_t [IEEE80211_ADDR_LEN]);
80 static void node_cleanup(struct ieee80211_node *);
81 static void node_free(struct ieee80211_node *);
82 static void node_age(struct ieee80211_node *);
83 static int8_t node_getrssi(const struct ieee80211_node *);
84 static void node_getsignal(const struct ieee80211_node *, int8_t *, int8_t *);
85 static void node_getmimoinfo(const struct ieee80211_node *,
86 struct ieee80211_mimo_info *);
87
88 static void _ieee80211_free_node(struct ieee80211_node *);
89
90 static void node_reclaim(struct ieee80211_node_table *nt,
91 struct ieee80211_node *ni);
92 static void ieee80211_node_table_init(struct ieee80211com *ic,
93 struct ieee80211_node_table *nt, const char *name,
94 int inact, int keymaxix);
95 static void ieee80211_node_table_reset(struct ieee80211_node_table *,
96 struct ieee80211vap *);
97 static void ieee80211_node_table_cleanup(struct ieee80211_node_table *nt);
98 static void ieee80211_erp_timeout(struct ieee80211com *);
99
100 MALLOC_DEFINE(M_80211_NODE, "80211node", "802.11 node state");
101 MALLOC_DEFINE(M_80211_NODE_IE, "80211nodeie", "802.11 node ie");
102
103 void
104 ieee80211_node_attach(struct ieee80211com *ic)
105 {
106 /* XXX really want maxlen enforced per-sta */
107 ieee80211_ageq_init(&ic->ic_stageq, ic->ic_max_keyix * 8,
108 "802.11 staging q");
109 ieee80211_node_table_init(ic, &ic->ic_sta, "station",
110 IEEE80211_INACT_INIT, ic->ic_max_keyix);
111 callout_init(&ic->ic_inact, 1);
112 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz,
113 ieee80211_node_timeout, ic);
114
115 ic->ic_node_alloc = node_alloc;
116 ic->ic_node_free = node_free;
117 ic->ic_node_cleanup = node_cleanup;
118 ic->ic_node_age = node_age;
119 ic->ic_node_drain = node_age; /* NB: same as age */
120 ic->ic_node_getrssi = node_getrssi;
121 ic->ic_node_getsignal = node_getsignal;
122 ic->ic_node_getmimoinfo = node_getmimoinfo;
123
124 /*
125 * Set flags to be propagated to all vap's;
126 * these define default behaviour/configuration.
127 */
128 ic->ic_flags_ext |= IEEE80211_FEXT_INACT; /* inactivity processing */
129 }
130
131 void
132 ieee80211_node_detach(struct ieee80211com *ic)
133 {
134
135 callout_drain(&ic->ic_inact);
136 ieee80211_node_table_cleanup(&ic->ic_sta);
137 ieee80211_ageq_cleanup(&ic->ic_stageq);
138 }
139
140 void
141 ieee80211_node_vattach(struct ieee80211vap *vap)
142 {
143 /* NB: driver can override */
144 vap->iv_max_aid = IEEE80211_AID_DEF;
145
146 /* default station inactivity timer setings */
147 vap->iv_inact_init = IEEE80211_INACT_INIT;
148 vap->iv_inact_auth = IEEE80211_INACT_AUTH;
149 vap->iv_inact_run = IEEE80211_INACT_RUN;
150 vap->iv_inact_probe = IEEE80211_INACT_PROBE;
151
152 IEEE80211_DPRINTF(vap, IEEE80211_MSG_INACT,
153 "%s: init %u auth %u run %u probe %u\n", __func__,
154 vap->iv_inact_init, vap->iv_inact_auth,
155 vap->iv_inact_run, vap->iv_inact_probe);
156 }
157
158 void
159 ieee80211_node_latevattach(struct ieee80211vap *vap)
160 {
161 if (vap->iv_opmode == IEEE80211_M_HOSTAP) {
162 /* XXX should we allow max aid to be zero? */
163 if (vap->iv_max_aid < IEEE80211_AID_MIN) {
164 vap->iv_max_aid = IEEE80211_AID_MIN;
165 if_printf(vap->iv_ifp,
166 "WARNING: max aid too small, changed to %d\n",
167 vap->iv_max_aid);
168 }
169 vap->iv_aid_bitmap = (uint32_t *) IEEE80211_MALLOC(
170 howmany(vap->iv_max_aid, 32) * sizeof(uint32_t),
171 M_80211_NODE,
172 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
173 if (vap->iv_aid_bitmap == NULL) {
174 /* XXX no way to recover */
175 printf("%s: no memory for AID bitmap, max aid %d!\n",
176 __func__, vap->iv_max_aid);
177 vap->iv_max_aid = 0;
178 }
179 }
180
181 ieee80211_reset_bss(vap);
182
183 vap->iv_auth = ieee80211_authenticator_get(vap->iv_bss->ni_authmode);
184 }
185
186 void
187 ieee80211_node_vdetach(struct ieee80211vap *vap)
188 {
189 struct ieee80211com *ic = vap->iv_ic;
190
191 ieee80211_node_table_reset(&ic->ic_sta, vap);
192 if (vap->iv_bss != NULL) {
193 ieee80211_free_node(vap->iv_bss);
194 vap->iv_bss = NULL;
195 }
196 if (vap->iv_aid_bitmap != NULL) {
197 IEEE80211_FREE(vap->iv_aid_bitmap, M_80211_NODE);
198 vap->iv_aid_bitmap = NULL;
199 }
200 }
201
202 /*
203 * Port authorize/unauthorize interfaces for use by an authenticator.
204 */
205
206 void
207 ieee80211_node_authorize(struct ieee80211_node *ni)
208 {
209 struct ieee80211vap *vap = ni->ni_vap;
210
211 ni->ni_flags |= IEEE80211_NODE_AUTH;
212 ni->ni_inact_reload = vap->iv_inact_run;
213 ni->ni_inact = ni->ni_inact_reload;
214
215 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni,
216 "%s: inact_reload %u", __func__, ni->ni_inact_reload);
217 }
218
219 void
220 ieee80211_node_unauthorize(struct ieee80211_node *ni)
221 {
222 struct ieee80211vap *vap = ni->ni_vap;
223
224 ni->ni_flags &= ~IEEE80211_NODE_AUTH;
225 ni->ni_inact_reload = vap->iv_inact_auth;
226 if (ni->ni_inact > ni->ni_inact_reload)
227 ni->ni_inact = ni->ni_inact_reload;
228
229 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni,
230 "%s: inact_reload %u inact %u", __func__,
231 ni->ni_inact_reload, ni->ni_inact);
232 }
233
234 /*
235 * Fix tx parameters for a node according to ``association state''.
236 */
237 void
238 ieee80211_node_setuptxparms(struct ieee80211_node *ni)
239 {
240 struct ieee80211vap *vap = ni->ni_vap;
241 enum ieee80211_phymode mode;
242
243 if (ni->ni_flags & IEEE80211_NODE_HT) {
244 if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan))
245 mode = IEEE80211_MODE_11NA;
246 else
247 mode = IEEE80211_MODE_11NG;
248 } else { /* legacy rate handling */
249 if (IEEE80211_IS_CHAN_ST(ni->ni_chan))
250 mode = IEEE80211_MODE_STURBO_A;
251 else if (IEEE80211_IS_CHAN_HALF(ni->ni_chan))
252 mode = IEEE80211_MODE_HALF;
253 else if (IEEE80211_IS_CHAN_QUARTER(ni->ni_chan))
254 mode = IEEE80211_MODE_QUARTER;
255 /* NB: 108A should be handled as 11a */
256 else if (IEEE80211_IS_CHAN_A(ni->ni_chan))
257 mode = IEEE80211_MODE_11A;
258 else if (IEEE80211_IS_CHAN_108G(ni->ni_chan) ||
259 (ni->ni_flags & IEEE80211_NODE_ERP))
260 mode = IEEE80211_MODE_11G;
261 else
262 mode = IEEE80211_MODE_11B;
263 }
264 ni->ni_txparms = &vap->iv_txparms[mode];
265 }
266
267 /*
268 * Set/change the channel. The rate set is also updated as
269 * to insure a consistent view by drivers.
270 * XXX should be private but hostap needs it to deal with CSA
271 */
272 void
273 ieee80211_node_set_chan(struct ieee80211_node *ni,
274 struct ieee80211_channel *chan)
275 {
276 struct ieee80211com *ic = ni->ni_ic;
277 struct ieee80211vap *vap = ni->ni_vap;
278 enum ieee80211_phymode mode;
279
280 KASSERT(chan != IEEE80211_CHAN_ANYC, ("no channel"));
281
282 ni->ni_chan = chan;
283 mode = ieee80211_chan2mode(chan);
284 if (IEEE80211_IS_CHAN_HT(chan)) {
285 /*
286 * We must install the legacy rate est in ni_rates and the
287 * HT rate set in ni_htrates.
288 */
289 ni->ni_htrates = *ieee80211_get_suphtrates(ic, chan);
290 /*
291 * Setup bss tx parameters based on operating mode. We
292 * use legacy rates when operating in a mixed HT+non-HT bss
293 * and non-ERP rates in 11g for mixed ERP+non-ERP bss.
294 */
295 if (mode == IEEE80211_MODE_11NA &&
296 (vap->iv_flags_ht & IEEE80211_FHT_PUREN) == 0)
297 mode = IEEE80211_MODE_11A;
298 else if (mode == IEEE80211_MODE_11NG &&
299 (vap->iv_flags_ht & IEEE80211_FHT_PUREN) == 0)
300 mode = IEEE80211_MODE_11G;
301 if (mode == IEEE80211_MODE_11G &&
302 (vap->iv_flags & IEEE80211_F_PUREG) == 0)
303 mode = IEEE80211_MODE_11B;
304 }
305 ni->ni_txparms = &vap->iv_txparms[mode];
306 ni->ni_rates = *ieee80211_get_suprates(ic, chan);
307 }
308
309 static __inline void
310 copy_bss(struct ieee80211_node *nbss, const struct ieee80211_node *obss)
311 {
312 /* propagate useful state */
313 nbss->ni_authmode = obss->ni_authmode;
314 nbss->ni_txpower = obss->ni_txpower;
315 nbss->ni_vlan = obss->ni_vlan;
316 /* XXX statistics? */
317 /* XXX legacy WDS bssid? */
318 }
319
320 void
321 ieee80211_create_ibss(struct ieee80211vap* vap, struct ieee80211_channel *chan)
322 {
323 struct ieee80211com *ic = vap->iv_ic;
324 struct ieee80211_node *ni;
325
326 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN,
327 "%s: creating %s on channel %u%c\n", __func__,
328 ieee80211_opmode_name[vap->iv_opmode],
329 ieee80211_chan2ieee(ic, chan),
330 ieee80211_channel_type_char(chan));
331
332 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr);
333 if (ni == NULL) {
334 /* XXX recovery? */
335 return;
336 }
337 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr);
338 ni->ni_esslen = vap->iv_des_ssid[0].len;
339 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen);
340 if (vap->iv_bss != NULL)
341 copy_bss(ni, vap->iv_bss);
342 ni->ni_intval = ic->ic_bintval;
343 if (vap->iv_flags & IEEE80211_F_PRIVACY)
344 ni->ni_capinfo |= IEEE80211_CAPINFO_PRIVACY;
345 if (ic->ic_phytype == IEEE80211_T_FH) {
346 ni->ni_fhdwell = 200; /* XXX */
347 ni->ni_fhindex = 1;
348 }
349 if (vap->iv_opmode == IEEE80211_M_IBSS) {
350 vap->iv_flags |= IEEE80211_F_SIBSS;
351 ni->ni_capinfo |= IEEE80211_CAPINFO_IBSS; /* XXX */
352 if (vap->iv_flags & IEEE80211_F_DESBSSID)
353 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid);
354 else {
355 get_random_bytes(ni->ni_bssid, IEEE80211_ADDR_LEN);
356 /* clear group bit, add local bit */
357 ni->ni_bssid[0] = (ni->ni_bssid[0] &~ 0x01) | 0x02;
358 }
359 } else if (vap->iv_opmode == IEEE80211_M_AHDEMO) {
360 if (vap->iv_flags & IEEE80211_F_DESBSSID)
361 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid);
362 else
363 #ifdef IEEE80211_SUPPORT_TDMA
364 if ((vap->iv_caps & IEEE80211_C_TDMA) == 0)
365 #endif
366 memset(ni->ni_bssid, 0, IEEE80211_ADDR_LEN);
367 #ifdef IEEE80211_SUPPORT_MESH
368 } else if (vap->iv_opmode == IEEE80211_M_MBSS) {
369 ni->ni_meshidlen = vap->iv_mesh->ms_idlen;
370 memcpy(ni->ni_meshid, vap->iv_mesh->ms_id, ni->ni_meshidlen);
371 #endif
372 }
373 /*
374 * Fix the channel and related attributes.
375 */
376 /* clear DFS CAC state on previous channel */
377 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC &&
378 ic->ic_bsschan->ic_freq != chan->ic_freq &&
379 IEEE80211_IS_CHAN_CACDONE(ic->ic_bsschan))
380 ieee80211_dfs_cac_clear(ic, ic->ic_bsschan);
381 ic->ic_bsschan = chan;
382 ieee80211_node_set_chan(ni, chan);
383 ic->ic_curmode = ieee80211_chan2mode(chan);
384 /*
385 * Do mode-specific setup.
386 */
387 if (IEEE80211_IS_CHAN_FULL(chan)) {
388 if (IEEE80211_IS_CHAN_ANYG(chan)) {
389 /*
390 * Use a mixed 11b/11g basic rate set.
391 */
392 ieee80211_setbasicrates(&ni->ni_rates,
393 IEEE80211_MODE_11G);
394 if (vap->iv_flags & IEEE80211_F_PUREG) {
395 /*
396 * Also mark OFDM rates basic so 11b
397 * stations do not join (WiFi compliance).
398 */
399 ieee80211_addbasicrates(&ni->ni_rates,
400 IEEE80211_MODE_11A);
401 }
402 } else if (IEEE80211_IS_CHAN_B(chan)) {
403 /*
404 * Force pure 11b rate set.
405 */
406 ieee80211_setbasicrates(&ni->ni_rates,
407 IEEE80211_MODE_11B);
408 }
409 }
410
411 (void) ieee80211_sta_join1(ieee80211_ref_node(ni));
412 }
413
414 /*
415 * Reset bss state on transition to the INIT state.
416 * Clear any stations from the table (they have been
417 * deauth'd) and reset the bss node (clears key, rate
418 * etc. state).
419 */
420 void
421 ieee80211_reset_bss(struct ieee80211vap *vap)
422 {
423 struct ieee80211com *ic = vap->iv_ic;
424 struct ieee80211_node *ni, *obss;
425
426 ieee80211_node_table_reset(&ic->ic_sta, vap);
427 /* XXX multi-bss: wrong */
428 ieee80211_reset_erp(ic);
429
430 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr);
431 KASSERT(ni != NULL, ("unable to setup initial BSS node"));
432 obss = vap->iv_bss;
433 vap->iv_bss = ieee80211_ref_node(ni);
434 if (obss != NULL) {
435 copy_bss(ni, obss);
436 ni->ni_intval = ic->ic_bintval;
437 ieee80211_free_node(obss);
438 } else
439 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr);
440 }
441
442 static int
443 match_ssid(const struct ieee80211_node *ni,
444 int nssid, const struct ieee80211_scan_ssid ssids[])
445 {
446 int i;
447
448 for (i = 0; i < nssid; i++) {
449 if (ni->ni_esslen == ssids[i].len &&
450 memcmp(ni->ni_essid, ssids[i].ssid, ni->ni_esslen) == 0)
451 return 1;
452 }
453 return 0;
454 }
455
456 /*
457 * Test a node for suitability/compatibility.
458 */
459 static int
460 check_bss(struct ieee80211vap *vap, struct ieee80211_node *ni)
461 {
462 struct ieee80211com *ic = ni->ni_ic;
463 uint8_t rate;
464
465 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan)))
466 return 0;
467 if (vap->iv_opmode == IEEE80211_M_IBSS) {
468 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0)
469 return 0;
470 } else {
471 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0)
472 return 0;
473 }
474 if (vap->iv_flags & IEEE80211_F_PRIVACY) {
475 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0)
476 return 0;
477 } else {
478 /* XXX does this mean privacy is supported or required? */
479 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY)
480 return 0;
481 }
482 rate = ieee80211_fix_rate(ni, &ni->ni_rates,
483 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE);
484 if (rate & IEEE80211_RATE_BASIC)
485 return 0;
486 if (vap->iv_des_nssid != 0 &&
487 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid))
488 return 0;
489 if ((vap->iv_flags & IEEE80211_F_DESBSSID) &&
490 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid))
491 return 0;
492 return 1;
493 }
494
495 #ifdef IEEE80211_DEBUG
496 /*
497 * Display node suitability/compatibility.
498 */
499 static void
500 check_bss_debug(struct ieee80211vap *vap, struct ieee80211_node *ni)
501 {
502 struct ieee80211com *ic = ni->ni_ic;
503 uint8_t rate;
504 int fail;
505
506 fail = 0;
507 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan)))
508 fail |= 0x01;
509 if (vap->iv_opmode == IEEE80211_M_IBSS) {
510 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0)
511 fail |= 0x02;
512 } else {
513 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0)
514 fail |= 0x02;
515 }
516 if (vap->iv_flags & IEEE80211_F_PRIVACY) {
517 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0)
518 fail |= 0x04;
519 } else {
520 /* XXX does this mean privacy is supported or required? */
521 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY)
522 fail |= 0x04;
523 }
524 rate = ieee80211_fix_rate(ni, &ni->ni_rates,
525 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE);
526 if (rate & IEEE80211_RATE_BASIC)
527 fail |= 0x08;
528 if (vap->iv_des_nssid != 0 &&
529 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid))
530 fail |= 0x10;
531 if ((vap->iv_flags & IEEE80211_F_DESBSSID) &&
532 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid))
533 fail |= 0x20;
534
535 printf(" %c %s", fail ? '-' : '+', ether_sprintf(ni->ni_macaddr));
536 printf(" %s%c", ether_sprintf(ni->ni_bssid), fail & 0x20 ? '!' : ' ');
537 printf(" %3d%c",
538 ieee80211_chan2ieee(ic, ni->ni_chan), fail & 0x01 ? '!' : ' ');
539 printf(" %2dM%c", (rate & IEEE80211_RATE_VAL) / 2,
540 fail & 0x08 ? '!' : ' ');
541 printf(" %4s%c",
542 (ni->ni_capinfo & IEEE80211_CAPINFO_ESS) ? "ess" :
543 (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) ? "ibss" :
544 "????",
545 fail & 0x02 ? '!' : ' ');
546 printf(" %3s%c ",
547 (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) ? "wep" : "no",
548 fail & 0x04 ? '!' : ' ');
549 ieee80211_print_essid(ni->ni_essid, ni->ni_esslen);
550 printf("%s\n", fail & 0x10 ? "!" : "");
551 }
552 #endif /* IEEE80211_DEBUG */
553
554
555 int
556 ieee80211_ibss_merge_check(struct ieee80211_node *ni)
557 {
558 struct ieee80211vap *vap = ni->ni_vap;
559
560 if (ni == vap->iv_bss ||
561 IEEE80211_ADDR_EQ(ni->ni_bssid, vap->iv_bss->ni_bssid)) {
562 /* unchanged, nothing to do */
563 return 0;
564 }
565
566 if (!check_bss(vap, ni)) {
567 /* capabilities mismatch */
568 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC,
569 "%s: merge failed, capabilities mismatch\n", __func__);
570 #ifdef IEEE80211_DEBUG
571 if (ieee80211_msg_assoc(vap))
572 check_bss_debug(vap, ni);
573 #endif
574 vap->iv_stats.is_ibss_capmismatch++;
575 return 0;
576 }
577
578 return 1;
579 }
580
581 /*
582 * Check if the given node should populate the node table.
583 *
584 * We need to be in "see all beacons for all ssids" mode in order
585 * to do IBSS merges, however this means we will populate nodes for
586 * /all/ IBSS SSIDs, versus just the one we care about.
587 *
588 * So this check ensures the node can actually belong to our IBSS
589 * configuration. For now it simply checks the SSID.
590 */
591 int
592 ieee80211_ibss_node_check_new(struct ieee80211_node *ni,
593 const struct ieee80211_scanparams *scan)
594 {
595 struct ieee80211vap *vap = ni->ni_vap;
596 int i;
597
598 /*
599 * If we have no SSID and no scan SSID, return OK.
600 */
601 if (vap->iv_des_nssid == 0 && scan->ssid == NULL)
602 goto ok;
603
604 /*
605 * If we have one of (SSID, scan SSID) then return error.
606 */
607 if (!! (vap->iv_des_nssid == 0) != !! (scan->ssid == NULL))
608 goto mismatch;
609
610 /*
611 * Double-check - we need scan SSID.
612 */
613 if (scan->ssid == NULL)
614 goto mismatch;
615
616 /*
617 * Check if the scan SSID matches the SSID list for the VAP.
618 */
619 for (i = 0; i < vap->iv_des_nssid; i++) {
620
621 /* Sanity length check */
622 if (vap->iv_des_ssid[i].len != scan->ssid[1])
623 continue;
624
625 /* Note: SSID in the scan entry is the IE format */
626 if (memcmp(vap->iv_des_ssid[i].ssid, scan->ssid + 2,
627 vap->iv_des_ssid[i].len) == 0)
628 goto ok;
629 }
630
631 mismatch:
632 return (0);
633 ok:
634 return (1);
635 }
636
637 /*
638 * Handle 802.11 ad hoc network merge. The
639 * convention, set by the Wireless Ethernet Compatibility Alliance
640 * (WECA), is that an 802.11 station will change its BSSID to match
641 * the "oldest" 802.11 ad hoc network, on the same channel, that
642 * has the station's desired SSID. The "oldest" 802.11 network
643 * sends beacons with the greatest TSF timestamp.
644 *
645 * The caller is assumed to validate TSF's before attempting a merge.
646 *
647 * Return !0 if the BSSID changed, 0 otherwise.
648 */
649 int
650 ieee80211_ibss_merge(struct ieee80211_node *ni)
651 {
652 #ifdef IEEE80211_DEBUG
653 struct ieee80211vap *vap = ni->ni_vap;
654 struct ieee80211com *ic = ni->ni_ic;
655 #endif
656
657 if (! ieee80211_ibss_merge_check(ni))
658 return 0;
659
660 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC,
661 "%s: new bssid %s: %s preamble, %s slot time%s\n", __func__,
662 ether_sprintf(ni->ni_bssid),
663 ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long",
664 ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long",
665 ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : ""
666 );
667 return ieee80211_sta_join1(ieee80211_ref_node(ni));
668 }
669
670 /*
671 * Calculate HT channel promotion flags for all vaps.
672 * This assumes ni_chan have been setup for each vap.
673 */
674 static int
675 gethtadjustflags(struct ieee80211com *ic)
676 {
677 struct ieee80211vap *vap;
678 int flags;
679
680 flags = 0;
681 /* XXX locking */
682 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
683 if (vap->iv_state < IEEE80211_S_RUN)
684 continue;
685 switch (vap->iv_opmode) {
686 case IEEE80211_M_WDS:
687 case IEEE80211_M_STA:
688 case IEEE80211_M_AHDEMO:
689 case IEEE80211_M_HOSTAP:
690 case IEEE80211_M_IBSS:
691 case IEEE80211_M_MBSS:
692 flags |= ieee80211_htchanflags(vap->iv_bss->ni_chan);
693 break;
694 default:
695 break;
696 }
697 }
698 return flags;
699 }
700
701 /*
702 * Check if the current channel needs to change based on whether
703 * any vap's are using HT20/HT40. This is used to sync the state
704 * of ic_curchan after a channel width change on a running vap.
705 */
706 void
707 ieee80211_sync_curchan(struct ieee80211com *ic)
708 {
709 struct ieee80211_channel *c;
710
711 c = ieee80211_ht_adjust_channel(ic, ic->ic_curchan, gethtadjustflags(ic));
712 if (c != ic->ic_curchan) {
713 ic->ic_curchan = c;
714 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan);
715 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan);
716 IEEE80211_UNLOCK(ic);
717 ic->ic_set_channel(ic);
718 ieee80211_radiotap_chan_change(ic);
719 IEEE80211_LOCK(ic);
720 }
721 }
722
723 /*
724 * Setup the current channel. The request channel may be
725 * promoted if other vap's are operating with HT20/HT40.
726 */
727 void
728 ieee80211_setupcurchan(struct ieee80211com *ic, struct ieee80211_channel *c)
729 {
730 if (ic->ic_htcaps & IEEE80211_HTC_HT) {
731 int flags = gethtadjustflags(ic);
732 /*
733 * Check for channel promotion required to support the
734 * set of running vap's. This assumes we are called
735 * after ni_chan is setup for each vap.
736 */
737 /* NB: this assumes IEEE80211_FHT_USEHT40 > IEEE80211_FHT_HT */
738 if (flags > ieee80211_htchanflags(c))
739 c = ieee80211_ht_adjust_channel(ic, c, flags);
740 }
741 ic->ic_bsschan = ic->ic_curchan = c;
742 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan);
743 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan);
744 }
745
746 /*
747 * Change the current channel. The channel change is guaranteed to have
748 * happened before the next state change.
749 */
750 void
751 ieee80211_setcurchan(struct ieee80211com *ic, struct ieee80211_channel *c)
752 {
753 ieee80211_setupcurchan(ic, c);
754 ieee80211_runtask(ic, &ic->ic_chan_task);
755 }
756
757 void
758 ieee80211_update_chw(struct ieee80211com *ic)
759 {
760
761 ieee80211_setupcurchan(ic, ic->ic_curchan);
762 ieee80211_runtask(ic, &ic->ic_chw_task);
763 }
764
765 /*
766 * Join the specified IBSS/BSS network. The node is assumed to
767 * be passed in with a held reference.
768 */
769 static int
770 ieee80211_sta_join1(struct ieee80211_node *selbs)
771 {
772 struct ieee80211vap *vap = selbs->ni_vap;
773 struct ieee80211com *ic = selbs->ni_ic;
774 struct ieee80211_node *obss;
775 int canreassoc;
776
777 /*
778 * Committed to selbs, setup state.
779 */
780 obss = vap->iv_bss;
781 /*
782 * Check if old+new node have the same address in which
783 * case we can reassociate when operating in sta mode.
784 */
785 canreassoc = (obss != NULL &&
786 vap->iv_state == IEEE80211_S_RUN &&
787 IEEE80211_ADDR_EQ(obss->ni_macaddr, selbs->ni_macaddr));
788 vap->iv_bss = selbs; /* NB: caller assumed to bump refcnt */
789 if (obss != NULL) {
790 struct ieee80211_node_table *nt = obss->ni_table;
791
792 copy_bss(selbs, obss);
793 ieee80211_node_decref(obss); /* iv_bss reference */
794
795 IEEE80211_NODE_LOCK(nt);
796 node_reclaim(nt, obss); /* station table reference */
797 IEEE80211_NODE_UNLOCK(nt);
798
799 obss = NULL; /* NB: guard against later use */
800 }
801
802 /*
803 * Delete unusable rates; we've already checked
804 * that the negotiated rate set is acceptable.
805 */
806 ieee80211_fix_rate(vap->iv_bss, &vap->iv_bss->ni_rates,
807 IEEE80211_F_DODEL | IEEE80211_F_JOIN);
808
809 ieee80211_setcurchan(ic, selbs->ni_chan);
810 /*
811 * Set the erp state (mostly the slot time) to deal with
812 * the auto-select case; this should be redundant if the
813 * mode is locked.
814 */
815 ieee80211_reset_erp(ic);
816 ieee80211_wme_initparams(vap);
817
818 if (vap->iv_opmode == IEEE80211_M_STA) {
819 if (canreassoc) {
820 /* Reassociate */
821 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 1);
822 } else {
823 /*
824 * Act as if we received a DEAUTH frame in case we
825 * are invoked from the RUN state. This will cause
826 * us to try to re-authenticate if we are operating
827 * as a station.
828 */
829 ieee80211_new_state(vap, IEEE80211_S_AUTH,
830 IEEE80211_FC0_SUBTYPE_DEAUTH);
831 }
832 } else
833 ieee80211_new_state(vap, IEEE80211_S_RUN, -1);
834 return 1;
835 }
836
837 int
838 ieee80211_sta_join(struct ieee80211vap *vap, struct ieee80211_channel *chan,
839 const struct ieee80211_scan_entry *se)
840 {
841 struct ieee80211com *ic = vap->iv_ic;
842 struct ieee80211_node *ni;
843
844 ni = ieee80211_alloc_node(&ic->ic_sta, vap, se->se_macaddr);
845 if (ni == NULL) {
846 /* XXX msg */
847 return 0;
848 }
849
850 /*
851 * Expand scan state into node's format.
852 * XXX may not need all this stuff
853 */
854 IEEE80211_ADDR_COPY(ni->ni_bssid, se->se_bssid);
855 ni->ni_esslen = se->se_ssid[1];
856 memcpy(ni->ni_essid, se->se_ssid+2, ni->ni_esslen);
857 ni->ni_tstamp.tsf = se->se_tstamp.tsf;
858 ni->ni_intval = se->se_intval;
859 ni->ni_capinfo = se->se_capinfo;
860 ni->ni_chan = chan;
861 ni->ni_timoff = se->se_timoff;
862 ni->ni_fhdwell = se->se_fhdwell;
863 ni->ni_fhindex = se->se_fhindex;
864 ni->ni_erp = se->se_erp;
865 IEEE80211_RSSI_LPF(ni->ni_avgrssi, se->se_rssi);
866 ni->ni_noise = se->se_noise;
867 if (vap->iv_opmode == IEEE80211_M_STA) {
868 /* NB: only infrastructure mode requires an associd */
869 ni->ni_flags |= IEEE80211_NODE_ASSOCID;
870 }
871
872 if (ieee80211_ies_init(&ni->ni_ies, se->se_ies.data, se->se_ies.len)) {
873 ieee80211_ies_expand(&ni->ni_ies);
874 #ifdef IEEE80211_SUPPORT_SUPERG
875 if (ni->ni_ies.ath_ie != NULL)
876 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie);
877 #endif
878 if (ni->ni_ies.htcap_ie != NULL)
879 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie);
880 if (ni->ni_ies.htinfo_ie != NULL)
881 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie);
882 #ifdef IEEE80211_SUPPORT_MESH
883 if (ni->ni_ies.meshid_ie != NULL)
884 ieee80211_parse_meshid(ni, ni->ni_ies.meshid_ie);
885 #endif
886 #ifdef IEEE80211_SUPPORT_TDMA
887 if (ni->ni_ies.tdma_ie != NULL)
888 ieee80211_parse_tdma(ni, ni->ni_ies.tdma_ie);
889 #endif
890 }
891
892 vap->iv_dtim_period = se->se_dtimperiod;
893 vap->iv_dtim_count = 0;
894
895 /* NB: must be after ni_chan is setup */
896 ieee80211_setup_rates(ni, se->se_rates, se->se_xrates,
897 IEEE80211_F_DOSORT);
898 if (ieee80211_iserp_rateset(&ni->ni_rates))
899 ni->ni_flags |= IEEE80211_NODE_ERP;
900
901 /*
902 * Setup HT state for this node if it's available, otherwise
903 * non-STA modes won't pick this state up.
904 *
905 * For IBSS and related modes that don't go through an
906 * association request/response, the only appropriate place
907 * to setup the HT state is here.
908 */
909 if (ni->ni_ies.htinfo_ie != NULL &&
910 ni->ni_ies.htcap_ie != NULL &&
911 vap->iv_flags_ht & IEEE80211_FHT_HT) {
912 ieee80211_ht_node_init(ni);
913 ieee80211_ht_updateparams(ni,
914 ni->ni_ies.htcap_ie,
915 ni->ni_ies.htinfo_ie);
916 ieee80211_setup_htrates(ni, ni->ni_ies.htcap_ie,
917 IEEE80211_F_JOIN | IEEE80211_F_DOBRS);
918 ieee80211_setup_basic_htrates(ni, ni->ni_ies.htinfo_ie);
919 }
920 /* XXX else check for ath FF? */
921 /* XXX QoS? Difficult given that WME config is specific to a master */
922
923 ieee80211_node_setuptxparms(ni);
924 ieee80211_ratectl_node_init(ni);
925
926 return ieee80211_sta_join1(ieee80211_ref_node(ni));
927 }
928
929 /*
930 * Leave the specified IBSS/BSS network. The node is assumed to
931 * be passed in with a held reference.
932 */
933 void
934 ieee80211_sta_leave(struct ieee80211_node *ni)
935 {
936 struct ieee80211com *ic = ni->ni_ic;
937
938 ic->ic_node_cleanup(ni);
939 ieee80211_notify_node_leave(ni);
940 }
941
942 /*
943 * Send a deauthenticate frame and drop the station.
944 */
945 void
946 ieee80211_node_deauth(struct ieee80211_node *ni, int reason)
947 {
948 /* NB: bump the refcnt to be sure temporary nodes are not reclaimed */
949 ieee80211_ref_node(ni);
950 if (ni->ni_associd != 0)
951 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH, reason);
952 ieee80211_node_leave(ni);
953 ieee80211_free_node(ni);
954 }
955
956 static struct ieee80211_node *
957 node_alloc(struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN])
958 {
959 struct ieee80211_node *ni;
960
961 ni = (struct ieee80211_node *) IEEE80211_MALLOC(sizeof(struct ieee80211_node),
962 M_80211_NODE, IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
963 return ni;
964 }
965
966 /*
967 * Initialize an ie blob with the specified data. If previous
968 * data exists re-use the data block. As a side effect we clear
969 * all references to specific ie's; the caller is required to
970 * recalculate them.
971 */
972 int
973 ieee80211_ies_init(struct ieee80211_ies *ies, const uint8_t *data, int len)
974 {
975 /* NB: assumes data+len are the last fields */
976 memset(ies, 0, offsetof(struct ieee80211_ies, data));
977 if (ies->data != NULL && ies->len != len) {
978 /* data size changed */
979 IEEE80211_FREE(ies->data, M_80211_NODE_IE);
980 ies->data = NULL;
981 }
982 if (ies->data == NULL) {
983 ies->data = (uint8_t *) IEEE80211_MALLOC(len, M_80211_NODE_IE,
984 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
985 if (ies->data == NULL) {
986 ies->len = 0;
987 /* NB: pointers have already been zero'd above */
988 return 0;
989 }
990 }
991 memcpy(ies->data, data, len);
992 ies->len = len;
993 return 1;
994 }
995
996 /*
997 * Reclaim storage for an ie blob.
998 */
999 void
1000 ieee80211_ies_cleanup(struct ieee80211_ies *ies)
1001 {
1002 if (ies->data != NULL)
1003 IEEE80211_FREE(ies->data, M_80211_NODE_IE);
1004 }
1005
1006 /*
1007 * Expand an ie blob data contents and to fillin individual
1008 * ie pointers. The data blob is assumed to be well-formed;
1009 * we don't do any validity checking of ie lengths.
1010 */
1011 void
1012 ieee80211_ies_expand(struct ieee80211_ies *ies)
1013 {
1014 uint8_t *ie;
1015 int ielen;
1016
1017 ie = ies->data;
1018 ielen = ies->len;
1019 while (ielen > 0) {
1020 switch (ie[0]) {
1021 case IEEE80211_ELEMID_VENDOR:
1022 if (iswpaoui(ie))
1023 ies->wpa_ie = ie;
1024 else if (iswmeoui(ie))
1025 ies->wme_ie = ie;
1026 #ifdef IEEE80211_SUPPORT_SUPERG
1027 else if (isatherosoui(ie))
1028 ies->ath_ie = ie;
1029 #endif
1030 #ifdef IEEE80211_SUPPORT_TDMA
1031 else if (istdmaoui(ie))
1032 ies->tdma_ie = ie;
1033 #endif
1034 break;
1035 case IEEE80211_ELEMID_RSN:
1036 ies->rsn_ie = ie;
1037 break;
1038 case IEEE80211_ELEMID_HTCAP:
1039 ies->htcap_ie = ie;
1040 break;
1041 case IEEE80211_ELEMID_HTINFO:
1042 ies->htinfo_ie = ie;
1043 break;
1044 #ifdef IEEE80211_SUPPORT_MESH
1045 case IEEE80211_ELEMID_MESHID:
1046 ies->meshid_ie = ie;
1047 break;
1048 #endif
1049 }
1050 ielen -= 2 + ie[1];
1051 ie += 2 + ie[1];
1052 }
1053 }
1054
1055 /*
1056 * Reclaim any resources in a node and reset any critical
1057 * state. Typically nodes are free'd immediately after,
1058 * but in some cases the storage may be reused so we need
1059 * to insure consistent state (should probably fix that).
1060 */
1061 static void
1062 node_cleanup(struct ieee80211_node *ni)
1063 {
1064 struct ieee80211vap *vap = ni->ni_vap;
1065 struct ieee80211com *ic = ni->ni_ic;
1066 int i;
1067
1068 /* NB: preserve ni_table */
1069 if (ni->ni_flags & IEEE80211_NODE_PWR_MGT) {
1070 if (vap->iv_opmode != IEEE80211_M_STA)
1071 vap->iv_ps_sta--;
1072 ni->ni_flags &= ~IEEE80211_NODE_PWR_MGT;
1073 IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni,
1074 "power save mode off, %u sta's in ps mode", vap->iv_ps_sta);
1075 }
1076 /*
1077 * Cleanup any HT-related state.
1078 */
1079 if (ni->ni_flags & IEEE80211_NODE_HT)
1080 ieee80211_ht_node_cleanup(ni);
1081 #ifdef IEEE80211_SUPPORT_SUPERG
1082 /* Always do FF node cleanup; for A-MSDU */
1083 ieee80211_ff_node_cleanup(ni);
1084 #endif
1085 #ifdef IEEE80211_SUPPORT_MESH
1086 /*
1087 * Cleanup any mesh-related state.
1088 */
1089 if (vap->iv_opmode == IEEE80211_M_MBSS)
1090 ieee80211_mesh_node_cleanup(ni);
1091 #endif
1092 /*
1093 * Clear any staging queue entries.
1094 */
1095 ieee80211_ageq_drain_node(&ic->ic_stageq, ni);
1096
1097 /*
1098 * Clear AREF flag that marks the authorization refcnt bump
1099 * has happened. This is probably not needed as the node
1100 * should always be removed from the table so not found but
1101 * do it just in case.
1102 * Likewise clear the ASSOCID flag as these flags are intended
1103 * to be managed in tandem.
1104 */
1105 ni->ni_flags &= ~(IEEE80211_NODE_AREF | IEEE80211_NODE_ASSOCID);
1106
1107 /*
1108 * Drain power save queue and, if needed, clear TIM.
1109 */
1110 if (ieee80211_node_psq_drain(ni) != 0 && vap->iv_set_tim != NULL)
1111 vap->iv_set_tim(ni, 0);
1112
1113 ni->ni_associd = 0;
1114 if (ni->ni_challenge != NULL) {
1115 IEEE80211_FREE(ni->ni_challenge, M_80211_NODE);
1116 ni->ni_challenge = NULL;
1117 }
1118 /*
1119 * Preserve SSID, WPA, and WME ie's so the bss node is
1120 * reusable during a re-auth/re-assoc state transition.
1121 * If we remove these data they will not be recreated
1122 * because they come from a probe-response or beacon frame
1123 * which cannot be expected prior to the association-response.
1124 * This should not be an issue when operating in other modes
1125 * as stations leaving always go through a full state transition
1126 * which will rebuild this state.
1127 *
1128 * XXX does this leave us open to inheriting old state?
1129 */
1130 for (i = 0; i < nitems(ni->ni_rxfrag); i++)
1131 if (ni->ni_rxfrag[i] != NULL) {
1132 m_freem(ni->ni_rxfrag[i]);
1133 ni->ni_rxfrag[i] = NULL;
1134 }
1135 /*
1136 * Must be careful here to remove any key map entry w/o a LOR.
1137 */
1138 ieee80211_node_delucastkey(ni);
1139 }
1140
1141 static void
1142 node_free(struct ieee80211_node *ni)
1143 {
1144 struct ieee80211com *ic = ni->ni_ic;
1145
1146 ieee80211_ratectl_node_deinit(ni);
1147 ic->ic_node_cleanup(ni);
1148 ieee80211_ies_cleanup(&ni->ni_ies);
1149 ieee80211_psq_cleanup(&ni->ni_psq);
1150 IEEE80211_FREE(ni, M_80211_NODE);
1151 }
1152
1153 static void
1154 node_age(struct ieee80211_node *ni)
1155 {
1156 struct ieee80211vap *vap = ni->ni_vap;
1157
1158 /*
1159 * Age frames on the power save queue.
1160 */
1161 if (ieee80211_node_psq_age(ni) != 0 &&
1162 ni->ni_psq.psq_len == 0 && vap->iv_set_tim != NULL)
1163 vap->iv_set_tim(ni, 0);
1164 /*
1165 * Age out HT resources (e.g. frames on the
1166 * A-MPDU reorder queues).
1167 */
1168 if (ni->ni_associd != 0 && (ni->ni_flags & IEEE80211_NODE_HT))
1169 ieee80211_ht_node_age(ni);
1170 }
1171
1172 static int8_t
1173 node_getrssi(const struct ieee80211_node *ni)
1174 {
1175 uint32_t avgrssi = ni->ni_avgrssi;
1176 int32_t rssi;
1177
1178 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER)
1179 return 0;
1180 rssi = IEEE80211_RSSI_GET(avgrssi);
1181 return rssi < 0 ? 0 : rssi > 127 ? 127 : rssi;
1182 }
1183
1184 static void
1185 node_getsignal(const struct ieee80211_node *ni, int8_t *rssi, int8_t *noise)
1186 {
1187 *rssi = node_getrssi(ni);
1188 *noise = ni->ni_noise;
1189 }
1190
1191 static void
1192 node_getmimoinfo(const struct ieee80211_node *ni,
1193 struct ieee80211_mimo_info *info)
1194 {
1195 int i;
1196 uint32_t avgrssi;
1197 int32_t rssi;
1198
1199 bzero(info, sizeof(*info));
1200
1201 for (i = 0; i < ni->ni_mimo_chains; i++) {
1202 avgrssi = ni->ni_mimo_rssi_ctl[i];
1203 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) {
1204 info->rssi[i] = 0;
1205 } else {
1206 rssi = IEEE80211_RSSI_GET(avgrssi);
1207 info->rssi[i] = rssi < 0 ? 0 : rssi > 127 ? 127 : rssi;
1208 }
1209 info->noise[i] = ni->ni_mimo_noise_ctl[i];
1210 }
1211
1212 /* XXX ext radios? */
1213
1214 /* XXX EVM? */
1215 }
1216
1217 struct ieee80211_node *
1218 ieee80211_alloc_node(struct ieee80211_node_table *nt,
1219 struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN])
1220 {
1221 struct ieee80211com *ic = nt->nt_ic;
1222 struct ieee80211_node *ni;
1223 int hash;
1224
1225 ni = ic->ic_node_alloc(vap, macaddr);
1226 if (ni == NULL) {
1227 vap->iv_stats.is_rx_nodealloc++;
1228 return NULL;
1229 }
1230
1231 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1232 "%s %p<%s> in %s table\n", __func__, ni,
1233 ether_sprintf(macaddr), nt->nt_name);
1234
1235 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr);
1236 hash = IEEE80211_NODE_HASH(ic, macaddr);
1237 ieee80211_node_initref(ni); /* mark referenced */
1238 ni->ni_chan = IEEE80211_CHAN_ANYC;
1239 ni->ni_authmode = IEEE80211_AUTH_OPEN;
1240 ni->ni_txpower = ic->ic_txpowlimit; /* max power */
1241 ni->ni_txparms = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)];
1242 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE);
1243 ni->ni_avgrssi = IEEE80211_RSSI_DUMMY_MARKER;
1244 ni->ni_inact_reload = nt->nt_inact_init;
1245 ni->ni_inact = ni->ni_inact_reload;
1246 ni->ni_ath_defkeyix = 0x7fff;
1247 ieee80211_psq_init(&ni->ni_psq, "unknown");
1248 #ifdef IEEE80211_SUPPORT_MESH
1249 if (vap->iv_opmode == IEEE80211_M_MBSS)
1250 ieee80211_mesh_node_init(vap, ni);
1251 #endif
1252 IEEE80211_NODE_LOCK(nt);
1253 TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list);
1254 LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash);
1255 ni->ni_table = nt;
1256 ni->ni_vap = vap;
1257 ni->ni_ic = ic;
1258 IEEE80211_NODE_UNLOCK(nt);
1259
1260 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni,
1261 "%s: inact_reload %u", __func__, ni->ni_inact_reload);
1262
1263 ieee80211_ratectl_node_init(ni);
1264
1265 return ni;
1266 }
1267
1268 /*
1269 * Craft a temporary node suitable for sending a management frame
1270 * to the specified station. We craft only as much state as we
1271 * need to do the work since the node will be immediately reclaimed
1272 * once the send completes.
1273 */
1274 struct ieee80211_node *
1275 ieee80211_tmp_node(struct ieee80211vap *vap,
1276 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1277 {
1278 struct ieee80211com *ic = vap->iv_ic;
1279 struct ieee80211_node *ni;
1280
1281 ni = ic->ic_node_alloc(vap, macaddr);
1282 if (ni != NULL) {
1283 struct ieee80211_node *bss = vap->iv_bss;
1284
1285 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1286 "%s %p<%s>\n", __func__, ni, ether_sprintf(macaddr));
1287
1288 ni->ni_table = NULL; /* NB: pedantic */
1289 ni->ni_ic = ic; /* NB: needed to set channel */
1290 ni->ni_vap = vap;
1291
1292 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr);
1293 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid);
1294 ieee80211_node_initref(ni); /* mark referenced */
1295 /* NB: required by ieee80211_fix_rate */
1296 ieee80211_node_set_chan(ni, bss->ni_chan);
1297 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey,
1298 IEEE80211_KEYIX_NONE);
1299 ni->ni_txpower = bss->ni_txpower;
1300 /* XXX optimize away */
1301 ieee80211_psq_init(&ni->ni_psq, "unknown");
1302
1303 ieee80211_ratectl_node_init(ni);
1304 } else {
1305 /* XXX msg */
1306 vap->iv_stats.is_rx_nodealloc++;
1307 }
1308 return ni;
1309 }
1310
1311 struct ieee80211_node *
1312 ieee80211_dup_bss(struct ieee80211vap *vap,
1313 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1314 {
1315 struct ieee80211com *ic = vap->iv_ic;
1316 struct ieee80211_node *ni;
1317
1318 ni = ieee80211_alloc_node(&ic->ic_sta, vap, macaddr);
1319 if (ni != NULL) {
1320 struct ieee80211_node *bss = vap->iv_bss;
1321 /*
1322 * Inherit from iv_bss.
1323 */
1324 copy_bss(ni, bss);
1325 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid);
1326 ieee80211_node_set_chan(ni, bss->ni_chan);
1327 }
1328 return ni;
1329 }
1330
1331 /*
1332 * Create a bss node for a legacy WDS vap. The far end does
1333 * not associate so we just create create a new node and
1334 * simulate an association. The caller is responsible for
1335 * installing the node as the bss node and handling any further
1336 * setup work like authorizing the port.
1337 */
1338 struct ieee80211_node *
1339 ieee80211_node_create_wds(struct ieee80211vap *vap,
1340 const uint8_t bssid[IEEE80211_ADDR_LEN], struct ieee80211_channel *chan)
1341 {
1342 struct ieee80211com *ic = vap->iv_ic;
1343 struct ieee80211_node *ni;
1344
1345 /* XXX check if node already in sta table? */
1346 ni = ieee80211_alloc_node(&ic->ic_sta, vap, bssid);
1347 if (ni != NULL) {
1348 ni->ni_wdsvap = vap;
1349 IEEE80211_ADDR_COPY(ni->ni_bssid, bssid);
1350 /*
1351 * Inherit any manually configured settings.
1352 */
1353 copy_bss(ni, vap->iv_bss);
1354 ieee80211_node_set_chan(ni, chan);
1355 /* NB: propagate ssid so available to WPA supplicant */
1356 ni->ni_esslen = vap->iv_des_ssid[0].len;
1357 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen);
1358 /* NB: no associd for peer */
1359 /*
1360 * There are no management frames to use to
1361 * discover neighbor capabilities, so blindly
1362 * propagate the local configuration.
1363 */
1364 if (vap->iv_flags & IEEE80211_F_WME)
1365 ni->ni_flags |= IEEE80211_NODE_QOS;
1366 #ifdef IEEE80211_SUPPORT_SUPERG
1367 if (vap->iv_flags & IEEE80211_F_FF)
1368 ni->ni_flags |= IEEE80211_NODE_FF;
1369 #endif
1370 if ((ic->ic_htcaps & IEEE80211_HTC_HT) &&
1371 (vap->iv_flags_ht & IEEE80211_FHT_HT)) {
1372 /*
1373 * Device is HT-capable and HT is enabled for
1374 * the vap; setup HT operation. On return
1375 * ni_chan will be adjusted to an HT channel.
1376 */
1377 ieee80211_ht_wds_init(ni);
1378 } else {
1379 struct ieee80211_channel *c = ni->ni_chan;
1380 /*
1381 * Force a legacy channel to be used.
1382 */
1383 c = ieee80211_find_channel(ic,
1384 c->ic_freq, c->ic_flags &~ IEEE80211_CHAN_HT);
1385 KASSERT(c != NULL, ("no legacy channel, %u/%x",
1386 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags));
1387 ni->ni_chan = c;
1388 }
1389 }
1390 return ni;
1391 }
1392
1393 struct ieee80211_node *
1394 #ifdef IEEE80211_DEBUG_REFCNT
1395 ieee80211_find_node_locked_debug(struct ieee80211_node_table *nt,
1396 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line)
1397 #else
1398 ieee80211_find_node_locked(struct ieee80211_node_table *nt,
1399 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1400 #endif
1401 {
1402 struct ieee80211_node *ni;
1403 int hash;
1404
1405 IEEE80211_NODE_LOCK_ASSERT(nt);
1406
1407 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr);
1408 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) {
1409 if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) {
1410 ieee80211_ref_node(ni); /* mark referenced */
1411 #ifdef IEEE80211_DEBUG_REFCNT
1412 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1413 "%s (%s:%u) %p<%s> refcnt %d\n", __func__,
1414 func, line,
1415 ni, ether_sprintf(ni->ni_macaddr),
1416 ieee80211_node_refcnt(ni));
1417 #endif
1418 return ni;
1419 }
1420 }
1421 return NULL;
1422 }
1423
1424 struct ieee80211_node *
1425 #ifdef IEEE80211_DEBUG_REFCNT
1426 ieee80211_find_node_debug(struct ieee80211_node_table *nt,
1427 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line)
1428 #else
1429 ieee80211_find_node(struct ieee80211_node_table *nt,
1430 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1431 #endif
1432 {
1433 struct ieee80211_node *ni;
1434
1435 IEEE80211_NODE_LOCK(nt);
1436 ni = ieee80211_find_node_locked(nt, macaddr);
1437 IEEE80211_NODE_UNLOCK(nt);
1438 return ni;
1439 }
1440
1441 struct ieee80211_node *
1442 #ifdef IEEE80211_DEBUG_REFCNT
1443 ieee80211_find_vap_node_locked_debug(struct ieee80211_node_table *nt,
1444 const struct ieee80211vap *vap,
1445 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line)
1446 #else
1447 ieee80211_find_vap_node_locked(struct ieee80211_node_table *nt,
1448 const struct ieee80211vap *vap,
1449 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1450 #endif
1451 {
1452 struct ieee80211_node *ni;
1453 int hash;
1454
1455 IEEE80211_NODE_LOCK_ASSERT(nt);
1456
1457 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr);
1458 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) {
1459 if (ni->ni_vap == vap &&
1460 IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) {
1461 ieee80211_ref_node(ni); /* mark referenced */
1462 #ifdef IEEE80211_DEBUG_REFCNT
1463 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1464 "%s (%s:%u) %p<%s> refcnt %d\n", __func__,
1465 func, line,
1466 ni, ether_sprintf(ni->ni_macaddr),
1467 ieee80211_node_refcnt(ni));
1468 #endif
1469 return ni;
1470 }
1471 }
1472 return NULL;
1473 }
1474
1475 struct ieee80211_node *
1476 #ifdef IEEE80211_DEBUG_REFCNT
1477 ieee80211_find_vap_node_debug(struct ieee80211_node_table *nt,
1478 const struct ieee80211vap *vap,
1479 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line)
1480 #else
1481 ieee80211_find_vap_node(struct ieee80211_node_table *nt,
1482 const struct ieee80211vap *vap,
1483 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1484 #endif
1485 {
1486 struct ieee80211_node *ni;
1487
1488 IEEE80211_NODE_LOCK(nt);
1489 ni = ieee80211_find_vap_node_locked(nt, vap, macaddr);
1490 IEEE80211_NODE_UNLOCK(nt);
1491 return ni;
1492 }
1493
1494 /*
1495 * Fake up a node; this handles node discovery in adhoc mode.
1496 * Note that for the driver's benefit we we treat this like
1497 * an association so the driver has an opportunity to setup
1498 * it's private state.
1499 */
1500 struct ieee80211_node *
1501 ieee80211_fakeup_adhoc_node(struct ieee80211vap *vap,
1502 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1503 {
1504 struct ieee80211_node *ni;
1505
1506 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE | IEEE80211_MSG_ASSOC,
1507 "%s: mac<%s>\n", __func__, ether_sprintf(macaddr));
1508 ni = ieee80211_dup_bss(vap, macaddr);
1509 if (ni != NULL) {
1510 struct ieee80211com *ic = vap->iv_ic;
1511
1512 /* XXX no rate negotiation; just dup */
1513 ni->ni_rates = vap->iv_bss->ni_rates;
1514 if (ieee80211_iserp_rateset(&ni->ni_rates))
1515 ni->ni_flags |= IEEE80211_NODE_ERP;
1516 if (vap->iv_opmode == IEEE80211_M_AHDEMO) {
1517 /*
1518 * In adhoc demo mode there are no management
1519 * frames to use to discover neighbor capabilities,
1520 * so blindly propagate the local configuration
1521 * so we can do interesting things (e.g. use
1522 * WME to disable ACK's).
1523 */
1524 if (vap->iv_flags & IEEE80211_F_WME)
1525 ni->ni_flags |= IEEE80211_NODE_QOS;
1526 #ifdef IEEE80211_SUPPORT_SUPERG
1527 if (vap->iv_flags & IEEE80211_F_FF)
1528 ni->ni_flags |= IEEE80211_NODE_FF;
1529 #endif
1530 }
1531 ieee80211_node_setuptxparms(ni);
1532 ieee80211_ratectl_node_init(ni);
1533 if (ic->ic_newassoc != NULL)
1534 ic->ic_newassoc(ni, 1);
1535 /* XXX not right for 802.1x/WPA */
1536 ieee80211_node_authorize(ni);
1537 }
1538 return ni;
1539 }
1540
1541 void
1542 ieee80211_init_neighbor(struct ieee80211_node *ni,
1543 const struct ieee80211_frame *wh,
1544 const struct ieee80211_scanparams *sp)
1545 {
1546 int do_ht_setup = 0;
1547
1548 ni->ni_esslen = sp->ssid[1];
1549 memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]);
1550 IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3);
1551 memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp));
1552 ni->ni_intval = sp->bintval;
1553 ni->ni_capinfo = sp->capinfo;
1554 ni->ni_chan = ni->ni_ic->ic_curchan;
1555 ni->ni_fhdwell = sp->fhdwell;
1556 ni->ni_fhindex = sp->fhindex;
1557 ni->ni_erp = sp->erp;
1558 ni->ni_timoff = sp->timoff;
1559 #ifdef IEEE80211_SUPPORT_MESH
1560 if (ni->ni_vap->iv_opmode == IEEE80211_M_MBSS)
1561 ieee80211_mesh_init_neighbor(ni, wh, sp);
1562 #endif
1563 if (ieee80211_ies_init(&ni->ni_ies, sp->ies, sp->ies_len)) {
1564 ieee80211_ies_expand(&ni->ni_ies);
1565 if (ni->ni_ies.wme_ie != NULL)
1566 ni->ni_flags |= IEEE80211_NODE_QOS;
1567 else
1568 ni->ni_flags &= ~IEEE80211_NODE_QOS;
1569 #ifdef IEEE80211_SUPPORT_SUPERG
1570 if (ni->ni_ies.ath_ie != NULL)
1571 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie);
1572 #endif
1573 if (ni->ni_ies.htcap_ie != NULL)
1574 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie);
1575 if (ni->ni_ies.htinfo_ie != NULL)
1576 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie);
1577
1578 if ((ni->ni_ies.htcap_ie != NULL) &&
1579 (ni->ni_ies.htinfo_ie != NULL) &&
1580 (ni->ni_vap->iv_flags_ht & IEEE80211_FHT_HT)) {
1581 do_ht_setup = 1;
1582 }
1583 }
1584
1585 /* NB: must be after ni_chan is setup */
1586 ieee80211_setup_rates(ni, sp->rates, sp->xrates,
1587 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE |
1588 IEEE80211_F_DONEGO | IEEE80211_F_DODEL);
1589
1590 /*
1591 * If the neighbor is HT compatible, flip that on.
1592 */
1593 if (do_ht_setup) {
1594 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC,
1595 "%s: doing HT setup\n", __func__);
1596 ieee80211_ht_node_init(ni);
1597 ieee80211_ht_updateparams(ni,
1598 ni->ni_ies.htcap_ie,
1599 ni->ni_ies.htinfo_ie);
1600 ieee80211_setup_htrates(ni,
1601 ni->ni_ies.htcap_ie,
1602 IEEE80211_F_JOIN | IEEE80211_F_DOBRS);
1603 ieee80211_setup_basic_htrates(ni,
1604 ni->ni_ies.htinfo_ie);
1605 ieee80211_node_setuptxparms(ni);
1606 ieee80211_ratectl_node_init(ni);
1607 }
1608 }
1609
1610 /*
1611 * Do node discovery in adhoc mode on receipt of a beacon
1612 * or probe response frame. Note that for the driver's
1613 * benefit we we treat this like an association so the
1614 * driver has an opportunity to setup it's private state.
1615 */
1616 struct ieee80211_node *
1617 ieee80211_add_neighbor(struct ieee80211vap *vap,
1618 const struct ieee80211_frame *wh,
1619 const struct ieee80211_scanparams *sp)
1620 {
1621 struct ieee80211_node *ni;
1622
1623 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC,
1624 "%s: mac<%s>\n", __func__, ether_sprintf(wh->i_addr2));
1625 ni = ieee80211_dup_bss(vap, wh->i_addr2);/* XXX alloc_node? */
1626 if (ni != NULL) {
1627 struct ieee80211com *ic = vap->iv_ic;
1628
1629 ieee80211_init_neighbor(ni, wh, sp);
1630 if (ieee80211_iserp_rateset(&ni->ni_rates))
1631 ni->ni_flags |= IEEE80211_NODE_ERP;
1632 ieee80211_node_setuptxparms(ni);
1633 ieee80211_ratectl_node_init(ni);
1634 if (ic->ic_newassoc != NULL)
1635 ic->ic_newassoc(ni, 1);
1636 /* XXX not right for 802.1x/WPA */
1637 ieee80211_node_authorize(ni);
1638 }
1639 return ni;
1640 }
1641
1642 #define IS_PROBEREQ(wh) \
1643 ((wh->i_fc[0] & (IEEE80211_FC0_TYPE_MASK|IEEE80211_FC0_SUBTYPE_MASK)) \
1644 == (IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ))
1645 #define IS_BCAST_PROBEREQ(wh) \
1646 (IS_PROBEREQ(wh) && IEEE80211_IS_MULTICAST( \
1647 ((const struct ieee80211_frame *)(wh))->i_addr3))
1648
1649 static __inline struct ieee80211_node *
1650 _find_rxnode(struct ieee80211_node_table *nt,
1651 const struct ieee80211_frame_min *wh)
1652 {
1653 if (IS_BCAST_PROBEREQ(wh))
1654 return NULL; /* spam bcast probe req to all vap's */
1655 return ieee80211_find_node_locked(nt, wh->i_addr2);
1656 }
1657
1658 /*
1659 * Locate the node for sender, track state, and then pass the
1660 * (referenced) node up to the 802.11 layer for its use. Note
1661 * we can return NULL if the sender is not in the table.
1662 */
1663 struct ieee80211_node *
1664 #ifdef IEEE80211_DEBUG_REFCNT
1665 ieee80211_find_rxnode_debug(struct ieee80211com *ic,
1666 const struct ieee80211_frame_min *wh, const char *func, int line)
1667 #else
1668 ieee80211_find_rxnode(struct ieee80211com *ic,
1669 const struct ieee80211_frame_min *wh)
1670 #endif
1671 {
1672 struct ieee80211_node_table *nt;
1673 struct ieee80211_node *ni;
1674
1675 nt = &ic->ic_sta;
1676 IEEE80211_NODE_LOCK(nt);
1677 ni = _find_rxnode(nt, wh);
1678 IEEE80211_NODE_UNLOCK(nt);
1679
1680 return ni;
1681 }
1682
1683 /*
1684 * Like ieee80211_find_rxnode but use the supplied h/w
1685 * key index as a hint to locate the node in the key
1686 * mapping table. If an entry is present at the key
1687 * index we return it; otherwise do a normal lookup and
1688 * update the mapping table if the station has a unicast
1689 * key assigned to it.
1690 */
1691 struct ieee80211_node *
1692 #ifdef IEEE80211_DEBUG_REFCNT
1693 ieee80211_find_rxnode_withkey_debug(struct ieee80211com *ic,
1694 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix,
1695 const char *func, int line)
1696 #else
1697 ieee80211_find_rxnode_withkey(struct ieee80211com *ic,
1698 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix)
1699 #endif
1700 {
1701 struct ieee80211_node_table *nt;
1702 struct ieee80211_node *ni;
1703
1704 nt = &ic->ic_sta;
1705 IEEE80211_NODE_LOCK(nt);
1706 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax)
1707 ni = nt->nt_keyixmap[keyix];
1708 else
1709 ni = NULL;
1710 if (ni == NULL) {
1711 ni = _find_rxnode(nt, wh);
1712 if (ni != NULL && nt->nt_keyixmap != NULL) {
1713 /*
1714 * If the station has a unicast key cache slot
1715 * assigned update the key->node mapping table.
1716 */
1717 keyix = ni->ni_ucastkey.wk_rxkeyix;
1718 /* XXX can keyixmap[keyix] != NULL? */
1719 if (keyix < nt->nt_keyixmax &&
1720 nt->nt_keyixmap[keyix] == NULL) {
1721 IEEE80211_DPRINTF(ni->ni_vap,
1722 IEEE80211_MSG_NODE,
1723 "%s: add key map entry %p<%s> refcnt %d\n",
1724 __func__, ni, ether_sprintf(ni->ni_macaddr),
1725 ieee80211_node_refcnt(ni)+1);
1726 nt->nt_keyixmap[keyix] = ieee80211_ref_node(ni);
1727 }
1728 }
1729 } else {
1730 if (IS_BCAST_PROBEREQ(wh))
1731 ni = NULL; /* spam bcast probe req to all vap's */
1732 else
1733 ieee80211_ref_node(ni);
1734 }
1735 IEEE80211_NODE_UNLOCK(nt);
1736
1737 return ni;
1738 }
1739 #undef IS_BCAST_PROBEREQ
1740 #undef IS_PROBEREQ
1741
1742 /*
1743 * Return a reference to the appropriate node for sending
1744 * a data frame. This handles node discovery in adhoc networks.
1745 */
1746 struct ieee80211_node *
1747 #ifdef IEEE80211_DEBUG_REFCNT
1748 ieee80211_find_txnode_debug(struct ieee80211vap *vap,
1749 const uint8_t macaddr[IEEE80211_ADDR_LEN],
1750 const char *func, int line)
1751 #else
1752 ieee80211_find_txnode(struct ieee80211vap *vap,
1753 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1754 #endif
1755 {
1756 struct ieee80211_node_table *nt = &vap->iv_ic->ic_sta;
1757 struct ieee80211_node *ni;
1758
1759 /*
1760 * The destination address should be in the node table
1761 * unless this is a multicast/broadcast frame. We can
1762 * also optimize station mode operation, all frames go
1763 * to the bss node.
1764 */
1765 /* XXX can't hold lock across dup_bss 'cuz of recursive locking */
1766 IEEE80211_NODE_LOCK(nt);
1767 if (vap->iv_opmode == IEEE80211_M_STA ||
1768 vap->iv_opmode == IEEE80211_M_WDS ||
1769 IEEE80211_IS_MULTICAST(macaddr))
1770 ni = ieee80211_ref_node(vap->iv_bss);
1771 else
1772 ni = ieee80211_find_node_locked(nt, macaddr);
1773 IEEE80211_NODE_UNLOCK(nt);
1774
1775 if (ni == NULL) {
1776 if (vap->iv_opmode == IEEE80211_M_IBSS ||
1777 vap->iv_opmode == IEEE80211_M_AHDEMO) {
1778 /*
1779 * In adhoc mode cons up a node for the destination.
1780 * Note that we need an additional reference for the
1781 * caller to be consistent with
1782 * ieee80211_find_node_locked.
1783 */
1784 ni = ieee80211_fakeup_adhoc_node(vap, macaddr);
1785 if (ni != NULL)
1786 (void) ieee80211_ref_node(ni);
1787 } else {
1788 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, macaddr,
1789 "no node, discard frame (%s)", __func__);
1790 vap->iv_stats.is_tx_nonode++;
1791 }
1792 }
1793 return ni;
1794 }
1795
1796 static void
1797 _ieee80211_free_node(struct ieee80211_node *ni)
1798 {
1799 struct ieee80211_node_table *nt = ni->ni_table;
1800
1801 /*
1802 * NB: careful about referencing the vap as it may be
1803 * gone if the last reference was held by a driver.
1804 * We know the com will always be present so it's safe
1805 * to use ni_ic below to reclaim resources.
1806 */
1807 #if 0
1808 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1809 "%s %p<%s> in %s table\n", __func__, ni,
1810 ether_sprintf(ni->ni_macaddr),
1811 nt != NULL ? nt->nt_name : "<gone>");
1812 #endif
1813 if (ni->ni_associd != 0) {
1814 struct ieee80211vap *vap = ni->ni_vap;
1815 if (vap->iv_aid_bitmap != NULL)
1816 IEEE80211_AID_CLR(vap, ni->ni_associd);
1817 }
1818 if (nt != NULL) {
1819 TAILQ_REMOVE(&nt->nt_node, ni, ni_list);
1820 LIST_REMOVE(ni, ni_hash);
1821 }
1822 ni->ni_ic->ic_node_free(ni);
1823 }
1824
1825 /*
1826 * Clear any entry in the unicast key mapping table.
1827 */
1828 static int
1829 node_clear_keyixmap(struct ieee80211_node_table *nt, struct ieee80211_node *ni)
1830 {
1831 ieee80211_keyix keyix;
1832
1833 keyix = ni->ni_ucastkey.wk_rxkeyix;
1834 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax &&
1835 nt->nt_keyixmap[keyix] == ni) {
1836 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1837 "%s: %p<%s> clear key map entry %u\n",
1838 __func__, ni, ether_sprintf(ni->ni_macaddr), keyix);
1839 nt->nt_keyixmap[keyix] = NULL;
1840 ieee80211_node_decref(ni);
1841 return 1;
1842 }
1843
1844 return 0;
1845 }
1846
1847 void
1848 #ifdef IEEE80211_DEBUG_REFCNT
1849 ieee80211_free_node_debug(struct ieee80211_node *ni, const char *func, int line)
1850 #else
1851 ieee80211_free_node(struct ieee80211_node *ni)
1852 #endif
1853 {
1854 struct ieee80211_node_table *nt = ni->ni_table;
1855
1856 #ifdef IEEE80211_DEBUG_REFCNT
1857 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1858 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni,
1859 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1);
1860 #endif
1861 if (nt != NULL) {
1862 IEEE80211_NODE_LOCK(nt);
1863 if (ieee80211_node_dectestref(ni)) {
1864 /*
1865 * Last reference, reclaim state.
1866 */
1867 _ieee80211_free_node(ni);
1868 } else if (ieee80211_node_refcnt(ni) == 1)
1869 if (node_clear_keyixmap(nt, ni))
1870 _ieee80211_free_node(ni);
1871 IEEE80211_NODE_UNLOCK(nt);
1872 } else {
1873 if (ieee80211_node_dectestref(ni))
1874 _ieee80211_free_node(ni);
1875 }
1876 }
1877
1878 /*
1879 * Reclaim a unicast key and clear any key cache state.
1880 */
1881 int
1882 ieee80211_node_delucastkey(struct ieee80211_node *ni)
1883 {
1884 struct ieee80211com *ic = ni->ni_ic;
1885 struct ieee80211_node_table *nt = &ic->ic_sta;
1886 struct ieee80211_node *nikey;
1887 ieee80211_keyix keyix;
1888 int isowned, status;
1889
1890 /*
1891 * NB: We must beware of LOR here; deleting the key
1892 * can cause the crypto layer to block traffic updates
1893 * which can generate a LOR against the node table lock;
1894 * grab it here and stash the key index for our use below.
1895 *
1896 * Must also beware of recursion on the node table lock.
1897 * When called from node_cleanup we may already have
1898 * the node table lock held. Unfortunately there's no
1899 * way to separate out this path so we must do this
1900 * conditionally.
1901 */
1902 isowned = IEEE80211_NODE_IS_LOCKED(nt);
1903 if (!isowned)
1904 IEEE80211_NODE_LOCK(nt);
1905 nikey = NULL;
1906 status = 1; /* NB: success */
1907 if (ni->ni_ucastkey.wk_keyix != IEEE80211_KEYIX_NONE) {
1908 keyix = ni->ni_ucastkey.wk_rxkeyix;
1909 status = ieee80211_crypto_delkey(ni->ni_vap, &ni->ni_ucastkey);
1910 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) {
1911 nikey = nt->nt_keyixmap[keyix];
1912 nt->nt_keyixmap[keyix] = NULL;
1913 }
1914 }
1915 if (!isowned)
1916 IEEE80211_NODE_UNLOCK(nt);
1917
1918 if (nikey != NULL) {
1919 KASSERT(nikey == ni,
1920 ("key map out of sync, ni %p nikey %p", ni, nikey));
1921 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1922 "%s: delete key map entry %p<%s> refcnt %d\n",
1923 __func__, ni, ether_sprintf(ni->ni_macaddr),
1924 ieee80211_node_refcnt(ni)-1);
1925 ieee80211_free_node(ni);
1926 }
1927 return status;
1928 }
1929
1930 /*
1931 * Reclaim a node. If this is the last reference count then
1932 * do the normal free work. Otherwise remove it from the node
1933 * table and mark it gone by clearing the back-reference.
1934 */
1935 static void
1936 node_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni)
1937 {
1938
1939 IEEE80211_NODE_LOCK_ASSERT(nt);
1940
1941 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1942 "%s: remove %p<%s> from %s table, refcnt %d\n",
1943 __func__, ni, ether_sprintf(ni->ni_macaddr),
1944 nt->nt_name, ieee80211_node_refcnt(ni)-1);
1945 /*
1946 * Clear any entry in the unicast key mapping table.
1947 * We need to do it here so rx lookups don't find it
1948 * in the mapping table even if it's not in the hash
1949 * table. We cannot depend on the mapping table entry
1950 * being cleared because the node may not be free'd.
1951 */
1952 (void)node_clear_keyixmap(nt, ni);
1953 if (!ieee80211_node_dectestref(ni)) {
1954 /*
1955 * Other references are present, just remove the
1956 * node from the table so it cannot be found. When
1957 * the references are dropped storage will be
1958 * reclaimed.
1959 */
1960 TAILQ_REMOVE(&nt->nt_node, ni, ni_list);
1961 LIST_REMOVE(ni, ni_hash);
1962 ni->ni_table = NULL; /* clear reference */
1963 } else
1964 _ieee80211_free_node(ni);
1965 }
1966
1967 /*
1968 * Node table support.
1969 */
1970
1971 static void
1972 ieee80211_node_table_init(struct ieee80211com *ic,
1973 struct ieee80211_node_table *nt,
1974 const char *name, int inact, int keyixmax)
1975 {
1976
1977 nt->nt_ic = ic;
1978 IEEE80211_NODE_LOCK_INIT(nt, ic->ic_name);
1979 TAILQ_INIT(&nt->nt_node);
1980 nt->nt_name = name;
1981 nt->nt_inact_init = inact;
1982 nt->nt_keyixmax = keyixmax;
1983 if (nt->nt_keyixmax > 0) {
1984 nt->nt_keyixmap = (struct ieee80211_node **) IEEE80211_MALLOC(
1985 keyixmax * sizeof(struct ieee80211_node *),
1986 M_80211_NODE,
1987 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
1988 if (nt->nt_keyixmap == NULL)
1989 ic_printf(ic,
1990 "Cannot allocate key index map with %u entries\n",
1991 keyixmax);
1992 } else
1993 nt->nt_keyixmap = NULL;
1994 }
1995
1996 static void
1997 ieee80211_node_table_reset(struct ieee80211_node_table *nt,
1998 struct ieee80211vap *match)
1999 {
2000 struct ieee80211_node *ni, *next;
2001
2002 IEEE80211_NODE_LOCK(nt);
2003 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) {
2004 if (match != NULL && ni->ni_vap != match)
2005 continue;
2006 /* XXX can this happen? if so need's work */
2007 if (ni->ni_associd != 0) {
2008 struct ieee80211vap *vap = ni->ni_vap;
2009
2010 if (vap->iv_auth->ia_node_leave != NULL)
2011 vap->iv_auth->ia_node_leave(ni);
2012 if (vap->iv_aid_bitmap != NULL)
2013 IEEE80211_AID_CLR(vap, ni->ni_associd);
2014 }
2015 ni->ni_wdsvap = NULL; /* clear reference */
2016 node_reclaim(nt, ni);
2017 }
2018 if (match != NULL && match->iv_opmode == IEEE80211_M_WDS) {
2019 /*
2020 * Make a separate pass to clear references to this vap
2021 * held by DWDS entries. They will not be matched above
2022 * because ni_vap will point to the ap vap but we still
2023 * need to clear ni_wdsvap when the WDS vap is destroyed
2024 * and/or reset.
2025 */
2026 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next)
2027 if (ni->ni_wdsvap == match)
2028 ni->ni_wdsvap = NULL;
2029 }
2030 IEEE80211_NODE_UNLOCK(nt);
2031 }
2032
2033 static void
2034 ieee80211_node_table_cleanup(struct ieee80211_node_table *nt)
2035 {
2036 ieee80211_node_table_reset(nt, NULL);
2037 if (nt->nt_keyixmap != NULL) {
2038 #ifdef DIAGNOSTIC
2039 /* XXX verify all entries are NULL */
2040 int i;
2041 for (i = 0; i < nt->nt_keyixmax; i++)
2042 if (nt->nt_keyixmap[i] != NULL)
2043 printf("%s: %s[%u] still active\n", __func__,
2044 nt->nt_name, i);
2045 #endif
2046 IEEE80211_FREE(nt->nt_keyixmap, M_80211_NODE);
2047 nt->nt_keyixmap = NULL;
2048 }
2049 IEEE80211_NODE_LOCK_DESTROY(nt);
2050 }
2051
2052 static void
2053 timeout_stations(void *arg __unused, struct ieee80211_node *ni)
2054 {
2055 struct ieee80211com *ic = ni->ni_ic;
2056 struct ieee80211vap *vap = ni->ni_vap;
2057
2058 /*
2059 * Only process stations when in RUN state. This
2060 * insures, for example, that we don't timeout an
2061 * inactive station during CAC. Note that CSA state
2062 * is actually handled in ieee80211_node_timeout as
2063 * it applies to more than timeout processing.
2064 */
2065 if (vap->iv_state != IEEE80211_S_RUN)
2066 return;
2067 /*
2068 * Ignore entries for which have yet to receive an
2069 * authentication frame. These are transient and
2070 * will be reclaimed when the last reference to them
2071 * goes away (when frame xmits complete).
2072 */
2073 if ((vap->iv_opmode == IEEE80211_M_HOSTAP ||
2074 vap->iv_opmode == IEEE80211_M_STA) &&
2075 (ni->ni_flags & IEEE80211_NODE_AREF) == 0)
2076 return;
2077 /*
2078 * Free fragment if not needed anymore
2079 * (last fragment older than 1s).
2080 * XXX doesn't belong here, move to node_age
2081 */
2082 if (ni->ni_rxfrag[0] != NULL &&
2083 ticks > ni->ni_rxfragstamp + hz) {
2084 m_freem(ni->ni_rxfrag[0]);
2085 ni->ni_rxfrag[0] = NULL;
2086 }
2087 if (ni->ni_inact > 0) {
2088 ni->ni_inact--;
2089 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni,
2090 "%s: inact %u inact_reload %u nrates %u",
2091 __func__, ni->ni_inact, ni->ni_inact_reload,
2092 ni->ni_rates.rs_nrates);
2093 }
2094 /*
2095 * Special case ourself; we may be idle for extended periods
2096 * of time and regardless reclaiming our state is wrong.
2097 * XXX run ic_node_age
2098 */
2099 /* XXX before inact decrement? */
2100 if (ni == vap->iv_bss)
2101 return;
2102 if (ni->ni_associd != 0 ||
2103 (vap->iv_opmode == IEEE80211_M_IBSS ||
2104 vap->iv_opmode == IEEE80211_M_AHDEMO)) {
2105 /*
2106 * Age/drain resources held by the station.
2107 */
2108 ic->ic_node_age(ni);
2109 /*
2110 * Probe the station before time it out. We
2111 * send a null data frame which may not be
2112 * universally supported by drivers (need it
2113 * for ps-poll support so it should be...).
2114 *
2115 * XXX don't probe the station unless we've
2116 * received a frame from them (and have
2117 * some idea of the rates they are capable
2118 * of); this will get fixed more properly
2119 * soon with better handling of the rate set.
2120 */
2121 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) &&
2122 (0 < ni->ni_inact &&
2123 ni->ni_inact <= vap->iv_inact_probe) &&
2124 ni->ni_rates.rs_nrates != 0) {
2125 IEEE80211_NOTE(vap,
2126 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE,
2127 ni, "%s",
2128 "probe station due to inactivity");
2129 /*
2130 * Grab a reference so the node cannot
2131 * be reclaimed before we send the frame.
2132 * ieee80211_send_nulldata understands
2133 * we've done this and reclaims the
2134 * ref for us as needed.
2135 */
2136 /* XXX fix this (not required anymore). */
2137 ieee80211_ref_node(ni);
2138 /* XXX useless */
2139 ieee80211_send_nulldata(ni);
2140 /* XXX stat? */
2141 return;
2142 }
2143 }
2144 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) &&
2145 ni->ni_inact <= 0) {
2146 IEEE80211_NOTE(vap,
2147 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, ni,
2148 "station timed out due to inactivity "
2149 "(refcnt %u)", ieee80211_node_refcnt(ni));
2150 /*
2151 * Send a deauthenticate frame and drop the station.
2152 * This is somewhat complicated due to reference counts
2153 * and locking. At this point a station will typically
2154 * have a reference count of 2. ieee80211_node_leave
2155 * will do a "free" of the node which will drop the
2156 * reference count. But in the meantime a reference
2157 * wil be held by the deauth frame. The actual reclaim
2158 * of the node will happen either after the tx is
2159 * completed or by ieee80211_node_leave.
2160 */
2161 if (ni->ni_associd != 0) {
2162 IEEE80211_SEND_MGMT(ni,
2163 IEEE80211_FC0_SUBTYPE_DEAUTH,
2164 IEEE80211_REASON_AUTH_EXPIRE);
2165 }
2166 ieee80211_node_leave(ni);
2167 vap->iv_stats.is_node_timeout++;
2168 }
2169 }
2170
2171 /*
2172 * Timeout inactive stations and do related housekeeping.
2173 */
2174 static void
2175 ieee80211_timeout_stations(struct ieee80211com *ic)
2176 {
2177 struct ieee80211_node_table *nt = &ic->ic_sta;
2178
2179 ieee80211_iterate_nodes(nt, timeout_stations, NULL);
2180 }
2181
2182 /*
2183 * Aggressively reclaim resources. This should be used
2184 * only in a critical situation to reclaim mbuf resources.
2185 */
2186 void
2187 ieee80211_drain(struct ieee80211com *ic)
2188 {
2189 struct ieee80211_node_table *nt = &ic->ic_sta;
2190 struct ieee80211vap *vap;
2191 struct ieee80211_node *ni;
2192
2193 IEEE80211_NODE_LOCK(nt);
2194 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) {
2195 /*
2196 * Ignore entries for which have yet to receive an
2197 * authentication frame. These are transient and
2198 * will be reclaimed when the last reference to them
2199 * goes away (when frame xmits complete).
2200 */
2201 vap = ni->ni_vap;
2202 /*
2203 * Only process stations when in RUN state. This
2204 * insures, for example, that we don't timeout an
2205 * inactive station during CAC. Note that CSA state
2206 * is actually handled in ieee80211_node_timeout as
2207 * it applies to more than timeout processing.
2208 */
2209 if (vap->iv_state != IEEE80211_S_RUN)
2210 continue;
2211 /* XXX can vap be NULL? */
2212 if ((vap->iv_opmode == IEEE80211_M_HOSTAP ||
2213 vap->iv_opmode == IEEE80211_M_STA) &&
2214 (ni->ni_flags & IEEE80211_NODE_AREF) == 0)
2215 continue;
2216 /*
2217 * Free fragments.
2218 * XXX doesn't belong here, move to node_drain
2219 */
2220 if (ni->ni_rxfrag[0] != NULL) {
2221 m_freem(ni->ni_rxfrag[0]);
2222 ni->ni_rxfrag[0] = NULL;
2223 }
2224 /*
2225 * Drain resources held by the station.
2226 */
2227 ic->ic_node_drain(ni);
2228 }
2229 IEEE80211_NODE_UNLOCK(nt);
2230 }
2231
2232 /*
2233 * Per-ieee80211com inactivity timer callback.
2234 */
2235 void
2236 ieee80211_node_timeout(void *arg)
2237 {
2238 struct ieee80211com *ic = arg;
2239
2240 /*
2241 * Defer timeout processing if a channel switch is pending.
2242 * We typically need to be mute so not doing things that
2243 * might generate frames is good to handle in one place.
2244 * Suppressing the station timeout processing may extend the
2245 * lifetime of inactive stations (by not decrementing their
2246 * idle counters) but this should be ok unless the CSA is
2247 * active for an unusually long time.
2248 */
2249 if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) {
2250 ieee80211_scan_timeout(ic);
2251 ieee80211_timeout_stations(ic);
2252 ieee80211_ageq_age(&ic->ic_stageq, IEEE80211_INACT_WAIT);
2253
2254 IEEE80211_LOCK(ic);
2255 ieee80211_erp_timeout(ic);
2256 ieee80211_ht_timeout(ic);
2257 IEEE80211_UNLOCK(ic);
2258 }
2259 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz,
2260 ieee80211_node_timeout, ic);
2261 }
2262
2263 /*
2264 * Iterate over the node table and return an array of ref'ed nodes.
2265 *
2266 * This is separated out from calling the actual node function so that
2267 * no LORs will occur.
2268 *
2269 * If there are too many nodes (ie, the number of nodes doesn't fit
2270 * within 'max_aid' entries) then the node references will be freed
2271 * and an error will be returned.
2272 *
2273 * The responsibility of allocating and freeing "ni_arr" is up to
2274 * the caller.
2275 */
2276 int
2277 ieee80211_iterate_nt(struct ieee80211_node_table *nt,
2278 struct ieee80211_node **ni_arr, uint16_t max_aid)
2279 {
2280 int i, j, ret;
2281 struct ieee80211_node *ni;
2282
2283 IEEE80211_NODE_LOCK(nt);
2284
2285 i = ret = 0;
2286 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) {
2287 if (i >= max_aid) {
2288 ret = E2BIG;
2289 ic_printf(nt->nt_ic, "Node array overflow: max=%u",
2290 max_aid);
2291 break;
2292 }
2293 ni_arr[i] = ieee80211_ref_node(ni);
2294 i++;
2295 }
2296
2297 /*
2298 * It's safe to unlock here.
2299 *
2300 * If we're successful, the list is returned.
2301 * If we're unsuccessful, the list is ignored
2302 * and we remove our references.
2303 *
2304 * This avoids any potential LOR with
2305 * ieee80211_free_node().
2306 */
2307 IEEE80211_NODE_UNLOCK(nt);
2308
2309 /*
2310 * If ret is non-zero, we hit some kind of error.
2311 * Rather than walking some nodes, we'll walk none
2312 * of them.
2313 */
2314 if (ret) {
2315 for (j = 0; j < i; j++) {
2316 /* ieee80211_free_node() locks by itself */
2317 ieee80211_free_node(ni_arr[j]);
2318 }
2319 }
2320
2321 return (ret);
2322 }
2323
2324 /*
2325 * Just a wrapper, so we don't have to change every ieee80211_iterate_nodes()
2326 * reference in the source.
2327 *
2328 * Note that this fetches 'max_aid' from the first VAP, rather than finding
2329 * the largest max_aid from all VAPs.
2330 */
2331 void
2332 ieee80211_iterate_nodes(struct ieee80211_node_table *nt,
2333 ieee80211_iter_func *f, void *arg)
2334 {
2335 struct ieee80211_node **ni_arr;
2336 size_t size;
2337 int i;
2338 uint16_t max_aid;
2339 struct ieee80211vap *vap;
2340
2341 /* Overdoing it default */
2342 max_aid = IEEE80211_AID_MAX;
2343
2344 /* Handle the case of there being no vaps just yet */
2345 vap = TAILQ_FIRST(&nt->nt_ic->ic_vaps);
2346 if (vap != NULL)
2347 max_aid = vap->iv_max_aid;
2348
2349 size = max_aid * sizeof(struct ieee80211_node *);
2350 ni_arr = (struct ieee80211_node **) IEEE80211_MALLOC(size, M_80211_NODE,
2351 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
2352 if (ni_arr == NULL)
2353 return;
2354
2355 /*
2356 * If this fails, the node table won't have any
2357 * valid entries - ieee80211_iterate_nt() frees
2358 * the references to them. So don't try walking
2359 * the table; just skip to the end and free the
2360 * temporary memory.
2361 */
2362 if (ieee80211_iterate_nt(nt, ni_arr, max_aid) != 0)
2363 goto done;
2364
2365 for (i = 0; i < max_aid; i++) {
2366 if (ni_arr[i] == NULL) /* end of the list */
2367 break;
2368 (*f)(arg, ni_arr[i]);
2369 /* ieee80211_free_node() locks by itself */
2370 ieee80211_free_node(ni_arr[i]);
2371 }
2372
2373 done:
2374 IEEE80211_FREE(ni_arr, M_80211_NODE);
2375 }
2376
2377 void
2378 ieee80211_dump_node(struct ieee80211_node_table *nt, struct ieee80211_node *ni)
2379 {
2380 printf("0x%p: mac %s refcnt %d\n", ni,
2381 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni));
2382 printf("\tauthmode %u flags 0x%x\n",
2383 ni->ni_authmode, ni->ni_flags);
2384 printf("\tassocid 0x%x txpower %u vlan %u\n",
2385 ni->ni_associd, ni->ni_txpower, ni->ni_vlan);
2386 printf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n",
2387 ni->ni_txseqs[IEEE80211_NONQOS_TID],
2388 ni->ni_rxseqs[IEEE80211_NONQOS_TID] >> IEEE80211_SEQ_SEQ_SHIFT,
2389 ni->ni_rxseqs[IEEE80211_NONQOS_TID] & IEEE80211_SEQ_FRAG_MASK,
2390 ni->ni_rxfragstamp);
2391 printf("\trssi %d noise %d intval %u capinfo 0x%x\n",
2392 node_getrssi(ni), ni->ni_noise,
2393 ni->ni_intval, ni->ni_capinfo);
2394 printf("\tbssid %s essid \"%.*s\" channel %u:0x%x\n",
2395 ether_sprintf(ni->ni_bssid),
2396 ni->ni_esslen, ni->ni_essid,
2397 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags);
2398 printf("\tinact %u inact_reload %u txrate %u\n",
2399 ni->ni_inact, ni->ni_inact_reload, ni->ni_txrate);
2400 printf("\thtcap %x htparam %x htctlchan %u ht2ndchan %u\n",
2401 ni->ni_htcap, ni->ni_htparam,
2402 ni->ni_htctlchan, ni->ni_ht2ndchan);
2403 printf("\thtopmode %x htstbc %x chw %u\n",
2404 ni->ni_htopmode, ni->ni_htstbc, ni->ni_chw);
2405 }
2406
2407 void
2408 ieee80211_dump_nodes(struct ieee80211_node_table *nt)
2409 {
2410 ieee80211_iterate_nodes(nt,
2411 (ieee80211_iter_func *) ieee80211_dump_node, nt);
2412 }
2413
2414 static void
2415 ieee80211_notify_erp_locked(struct ieee80211com *ic)
2416 {
2417 struct ieee80211vap *vap;
2418
2419 IEEE80211_LOCK_ASSERT(ic);
2420
2421 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
2422 if (vap->iv_opmode == IEEE80211_M_HOSTAP)
2423 ieee80211_beacon_notify(vap, IEEE80211_BEACON_ERP);
2424 }
2425
2426 void
2427 ieee80211_notify_erp(struct ieee80211com *ic)
2428 {
2429 IEEE80211_LOCK(ic);
2430 ieee80211_notify_erp_locked(ic);
2431 IEEE80211_UNLOCK(ic);
2432 }
2433
2434 /*
2435 * Handle a station joining an 11g network.
2436 */
2437 static void
2438 ieee80211_node_join_11g(struct ieee80211_node *ni)
2439 {
2440 struct ieee80211com *ic = ni->ni_ic;
2441
2442 IEEE80211_LOCK_ASSERT(ic);
2443
2444 /*
2445 * Station isn't capable of short slot time. Bump
2446 * the count of long slot time stations and disable
2447 * use of short slot time. Note that the actual switch
2448 * over to long slot time use may not occur until the
2449 * next beacon transmission (per sec. 7.3.1.4 of 11g).
2450 */
2451 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) {
2452 ic->ic_longslotsta++;
2453 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2454 "station needs long slot time, count %d",
2455 ic->ic_longslotsta);
2456 /* XXX vap's w/ conflicting needs won't work */
2457 if (!IEEE80211_IS_CHAN_108G(ic->ic_bsschan)) {
2458 /*
2459 * Don't force slot time when switched to turbo
2460 * mode as non-ERP stations won't be present; this
2461 * need only be done when on the normal G channel.
2462 */
2463 ieee80211_set_shortslottime(ic, 0);
2464 }
2465 }
2466 /*
2467 * If the new station is not an ERP station
2468 * then bump the counter and enable protection
2469 * if configured.
2470 */
2471 if (!ieee80211_iserp_rateset(&ni->ni_rates)) {
2472 ic->ic_nonerpsta++;
2473 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2474 "station is !ERP, %d non-ERP stations associated",
2475 ic->ic_nonerpsta);
2476 /*
2477 * If station does not support short preamble
2478 * then we must enable use of Barker preamble.
2479 */
2480 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) {
2481 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2482 "%s", "station needs long preamble");
2483 ic->ic_flags |= IEEE80211_F_USEBARKER;
2484 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE;
2485 }
2486 /*
2487 * If protection is configured and this is the first
2488 * indication we should use protection, enable it.
2489 */
2490 if (ic->ic_protmode != IEEE80211_PROT_NONE &&
2491 ic->ic_nonerpsta == 1 &&
2492 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) {
2493 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC,
2494 "%s: enable use of protection\n", __func__);
2495 ic->ic_flags |= IEEE80211_F_USEPROT;
2496 ieee80211_notify_erp_locked(ic);
2497 }
2498 } else
2499 ni->ni_flags |= IEEE80211_NODE_ERP;
2500 }
2501
2502 void
2503 ieee80211_node_join(struct ieee80211_node *ni, int resp)
2504 {
2505 struct ieee80211com *ic = ni->ni_ic;
2506 struct ieee80211vap *vap = ni->ni_vap;
2507 int newassoc;
2508
2509 if (ni->ni_associd == 0) {
2510 uint16_t aid;
2511
2512 KASSERT(vap->iv_aid_bitmap != NULL, ("no aid bitmap"));
2513 /*
2514 * It would be good to search the bitmap
2515 * more efficiently, but this will do for now.
2516 */
2517 for (aid = 1; aid < vap->iv_max_aid; aid++) {
2518 if (!IEEE80211_AID_ISSET(vap, aid))
2519 break;
2520 }
2521 if (aid >= vap->iv_max_aid) {
2522 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_TOOMANY);
2523 ieee80211_node_leave(ni);
2524 return;
2525 }
2526 ni->ni_associd = aid | 0xc000;
2527 ni->ni_jointime = time_uptime;
2528 IEEE80211_LOCK(ic);
2529 IEEE80211_AID_SET(vap, ni->ni_associd);
2530 vap->iv_sta_assoc++;
2531 ic->ic_sta_assoc++;
2532
2533 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan))
2534 ieee80211_ht_node_join(ni);
2535 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) &&
2536 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan))
2537 ieee80211_node_join_11g(ni);
2538 IEEE80211_UNLOCK(ic);
2539
2540 newassoc = 1;
2541 } else
2542 newassoc = 0;
2543
2544 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni,
2545 "station associated at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s",
2546 IEEE80211_NODE_AID(ni),
2547 ic->ic_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long",
2548 ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long",
2549 ic->ic_flags & IEEE80211_F_USEPROT ? ", protection" : "",
2550 ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "",
2551 ni->ni_flags & IEEE80211_NODE_HT ?
2552 (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "",
2553 ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "",
2554 ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" :
2555 ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "",
2556 ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "",
2557 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ?
2558 ", fast-frames" : "",
2559 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ?
2560 ", turbo" : ""
2561 );
2562
2563 ieee80211_node_setuptxparms(ni);
2564 ieee80211_ratectl_node_init(ni);
2565 /* give driver a chance to setup state like ni_txrate */
2566 if (ic->ic_newassoc != NULL)
2567 ic->ic_newassoc(ni, newassoc);
2568 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_SUCCESS);
2569 /* tell the authenticator about new station */
2570 if (vap->iv_auth->ia_node_join != NULL)
2571 vap->iv_auth->ia_node_join(ni);
2572 ieee80211_notify_node_join(ni,
2573 resp == IEEE80211_FC0_SUBTYPE_ASSOC_RESP);
2574 }
2575
2576 static void
2577 disable_protection(struct ieee80211com *ic)
2578 {
2579 KASSERT(ic->ic_nonerpsta == 0 &&
2580 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0,
2581 ("%d non ERP stations, flags 0x%x", ic->ic_nonerpsta,
2582 ic->ic_flags_ext));
2583
2584 ic->ic_flags &= ~IEEE80211_F_USEPROT;
2585 /* XXX verify mode? */
2586 if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) {
2587 ic->ic_flags |= IEEE80211_F_SHPREAMBLE;
2588 ic->ic_flags &= ~IEEE80211_F_USEBARKER;
2589 }
2590 ieee80211_notify_erp_locked(ic);
2591 }
2592
2593 /*
2594 * Handle a station leaving an 11g network.
2595 */
2596 static void
2597 ieee80211_node_leave_11g(struct ieee80211_node *ni)
2598 {
2599 struct ieee80211com *ic = ni->ni_ic;
2600
2601 IEEE80211_LOCK_ASSERT(ic);
2602
2603 KASSERT(IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan),
2604 ("not in 11g, bss %u:0x%x", ic->ic_bsschan->ic_freq,
2605 ic->ic_bsschan->ic_flags));
2606
2607 /*
2608 * If a long slot station do the slot time bookkeeping.
2609 */
2610 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) {
2611 KASSERT(ic->ic_longslotsta > 0,
2612 ("bogus long slot station count %d", ic->ic_longslotsta));
2613 ic->ic_longslotsta--;
2614 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2615 "long slot time station leaves, count now %d",
2616 ic->ic_longslotsta);
2617 if (ic->ic_longslotsta == 0) {
2618 /*
2619 * Re-enable use of short slot time if supported
2620 * and not operating in IBSS mode (per spec).
2621 */
2622 if ((ic->ic_caps & IEEE80211_C_SHSLOT) &&
2623 ic->ic_opmode != IEEE80211_M_IBSS) {
2624 IEEE80211_DPRINTF(ni->ni_vap,
2625 IEEE80211_MSG_ASSOC,
2626 "%s: re-enable use of short slot time\n",
2627 __func__);
2628 ieee80211_set_shortslottime(ic, 1);
2629 }
2630 }
2631 }
2632 /*
2633 * If a non-ERP station do the protection-related bookkeeping.
2634 */
2635 if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) {
2636 KASSERT(ic->ic_nonerpsta > 0,
2637 ("bogus non-ERP station count %d", ic->ic_nonerpsta));
2638 ic->ic_nonerpsta--;
2639 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2640 "non-ERP station leaves, count now %d%s", ic->ic_nonerpsta,
2641 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) ?
2642 " (non-ERP sta present)" : "");
2643 if (ic->ic_nonerpsta == 0 &&
2644 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) {
2645 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC,
2646 "%s: disable use of protection\n", __func__);
2647 disable_protection(ic);
2648 }
2649 }
2650 }
2651
2652 /*
2653 * Time out presence of an overlapping bss with non-ERP
2654 * stations. When operating in hostap mode we listen for
2655 * beacons from other stations and if we identify a non-ERP
2656 * station is present we enable protection. To identify
2657 * when all non-ERP stations are gone we time out this
2658 * condition.
2659 */
2660 static void
2661 ieee80211_erp_timeout(struct ieee80211com *ic)
2662 {
2663
2664 IEEE80211_LOCK_ASSERT(ic);
2665
2666 if ((ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) &&
2667 ieee80211_time_after(ticks, ic->ic_lastnonerp + IEEE80211_NONERP_PRESENT_AGE)) {
2668 #if 0
2669 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni,
2670 "%s", "age out non-ERP sta present on channel");
2671 #endif
2672 ic->ic_flags_ext &= ~IEEE80211_FEXT_NONERP_PR;
2673 if (ic->ic_nonerpsta == 0)
2674 disable_protection(ic);
2675 }
2676 }
2677
2678 /*
2679 * Handle bookkeeping for station deauthentication/disassociation
2680 * when operating as an ap.
2681 */
2682 void
2683 ieee80211_node_leave(struct ieee80211_node *ni)
2684 {
2685 struct ieee80211com *ic = ni->ni_ic;
2686 struct ieee80211vap *vap = ni->ni_vap;
2687 struct ieee80211_node_table *nt = ni->ni_table;
2688
2689 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni,
2690 "station with aid %d leaves", IEEE80211_NODE_AID(ni));
2691
2692 KASSERT(vap->iv_opmode != IEEE80211_M_STA,
2693 ("unexpected operating mode %u", vap->iv_opmode));
2694 /*
2695 * If node wasn't previously associated all
2696 * we need to do is reclaim the reference.
2697 */
2698 /* XXX ibss mode bypasses 11g and notification */
2699 if (ni->ni_associd == 0)
2700 goto done;
2701 /*
2702 * Tell the authenticator the station is leaving.
2703 * Note that we must do this before yanking the
2704 * association id as the authenticator uses the
2705 * associd to locate it's state block.
2706 */
2707 if (vap->iv_auth->ia_node_leave != NULL)
2708 vap->iv_auth->ia_node_leave(ni);
2709
2710 IEEE80211_LOCK(ic);
2711 IEEE80211_AID_CLR(vap, ni->ni_associd);
2712 vap->iv_sta_assoc--;
2713 ic->ic_sta_assoc--;
2714
2715 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan))
2716 ieee80211_ht_node_leave(ni);
2717 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) &&
2718 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan))
2719 ieee80211_node_leave_11g(ni);
2720 IEEE80211_UNLOCK(ic);
2721 /*
2722 * Cleanup station state. In particular clear various
2723 * state that might otherwise be reused if the node
2724 * is reused before the reference count goes to zero
2725 * (and memory is reclaimed).
2726 */
2727 ieee80211_sta_leave(ni);
2728 done:
2729 /*
2730 * Remove the node from any table it's recorded in and
2731 * drop the caller's reference. Removal from the table
2732 * is important to insure the node is not reprocessed
2733 * for inactivity.
2734 */
2735 if (nt != NULL) {
2736 IEEE80211_NODE_LOCK(nt);
2737 node_reclaim(nt, ni);
2738 IEEE80211_NODE_UNLOCK(nt);
2739 } else
2740 ieee80211_free_node(ni);
2741 }
2742
2743 struct rssiinfo {
2744 struct ieee80211vap *vap;
2745 int rssi_samples;
2746 uint32_t rssi_total;
2747 };
2748
2749 static void
2750 get_hostap_rssi(void *arg, struct ieee80211_node *ni)
2751 {
2752 struct rssiinfo *info = arg;
2753 struct ieee80211vap *vap = ni->ni_vap;
2754 int8_t rssi;
2755
2756 if (info->vap != vap)
2757 return;
2758 /* only associated stations */
2759 if (ni->ni_associd == 0)
2760 return;
2761 rssi = vap->iv_ic->ic_node_getrssi(ni);
2762 if (rssi != 0) {
2763 info->rssi_samples++;
2764 info->rssi_total += rssi;
2765 }
2766 }
2767
2768 static void
2769 get_adhoc_rssi(void *arg, struct ieee80211_node *ni)
2770 {
2771 struct rssiinfo *info = arg;
2772 struct ieee80211vap *vap = ni->ni_vap;
2773 int8_t rssi;
2774
2775 if (info->vap != vap)
2776 return;
2777 /* only neighbors */
2778 /* XXX check bssid */
2779 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0)
2780 return;
2781 rssi = vap->iv_ic->ic_node_getrssi(ni);
2782 if (rssi != 0) {
2783 info->rssi_samples++;
2784 info->rssi_total += rssi;
2785 }
2786 }
2787
2788 #ifdef IEEE80211_SUPPORT_MESH
2789 static void
2790 get_mesh_rssi(void *arg, struct ieee80211_node *ni)
2791 {
2792 struct rssiinfo *info = arg;
2793 struct ieee80211vap *vap = ni->ni_vap;
2794 int8_t rssi;
2795
2796 if (info->vap != vap)
2797 return;
2798 /* only neighbors that peered successfully */
2799 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED)
2800 return;
2801 rssi = vap->iv_ic->ic_node_getrssi(ni);
2802 if (rssi != 0) {
2803 info->rssi_samples++;
2804 info->rssi_total += rssi;
2805 }
2806 }
2807 #endif /* IEEE80211_SUPPORT_MESH */
2808
2809 int8_t
2810 ieee80211_getrssi(struct ieee80211vap *vap)
2811 {
2812 #define NZ(x) ((x) == 0 ? 1 : (x))
2813 struct ieee80211com *ic = vap->iv_ic;
2814 struct rssiinfo info;
2815
2816 info.rssi_total = 0;
2817 info.rssi_samples = 0;
2818 info.vap = vap;
2819 switch (vap->iv_opmode) {
2820 case IEEE80211_M_IBSS: /* average of all ibss neighbors */
2821 case IEEE80211_M_AHDEMO: /* average of all neighbors */
2822 ieee80211_iterate_nodes(&ic->ic_sta, get_adhoc_rssi, &info);
2823 break;
2824 case IEEE80211_M_HOSTAP: /* average of all associated stations */
2825 ieee80211_iterate_nodes(&ic->ic_sta, get_hostap_rssi, &info);
2826 break;
2827 #ifdef IEEE80211_SUPPORT_MESH
2828 case IEEE80211_M_MBSS: /* average of all mesh neighbors */
2829 ieee80211_iterate_nodes(&ic->ic_sta, get_mesh_rssi, &info);
2830 break;
2831 #endif
2832 case IEEE80211_M_MONITOR: /* XXX */
2833 case IEEE80211_M_STA: /* use stats from associated ap */
2834 default:
2835 if (vap->iv_bss != NULL)
2836 info.rssi_total = ic->ic_node_getrssi(vap->iv_bss);
2837 info.rssi_samples = 1;
2838 break;
2839 }
2840 return info.rssi_total / NZ(info.rssi_samples);
2841 #undef NZ
2842 }
2843
2844 void
2845 ieee80211_getsignal(struct ieee80211vap *vap, int8_t *rssi, int8_t *noise)
2846 {
2847
2848 if (vap->iv_bss == NULL) /* NB: shouldn't happen */
2849 return;
2850 vap->iv_ic->ic_node_getsignal(vap->iv_bss, rssi, noise);
2851 /* for non-station mode return avg'd rssi accounting */
2852 if (vap->iv_opmode != IEEE80211_M_STA)
2853 *rssi = ieee80211_getrssi(vap);
2854 }
Cache object: 40c29cd2b0d341a0cd740cc87004cc8d
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