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("$FreeBSD$");
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_drain(&ic->ic_stageq);
138 ieee80211_ageq_cleanup(&ic->ic_stageq);
139 }
140
141 void
142 ieee80211_node_vattach(struct ieee80211vap *vap)
143 {
144 /* NB: driver can override */
145 vap->iv_max_aid = IEEE80211_AID_DEF;
146
147 /* default station inactivity timer setings */
148 vap->iv_inact_init = IEEE80211_INACT_INIT;
149 vap->iv_inact_auth = IEEE80211_INACT_AUTH;
150 vap->iv_inact_run = IEEE80211_INACT_RUN;
151 vap->iv_inact_probe = IEEE80211_INACT_PROBE;
152
153 IEEE80211_DPRINTF(vap, IEEE80211_MSG_INACT,
154 "%s: init %u auth %u run %u probe %u\n", __func__,
155 vap->iv_inact_init, vap->iv_inact_auth,
156 vap->iv_inact_run, vap->iv_inact_probe);
157 }
158
159 void
160 ieee80211_node_latevattach(struct ieee80211vap *vap)
161 {
162 if (vap->iv_opmode == IEEE80211_M_HOSTAP) {
163 /* XXX should we allow max aid to be zero? */
164 if (vap->iv_max_aid < IEEE80211_AID_MIN) {
165 vap->iv_max_aid = IEEE80211_AID_MIN;
166 if_printf(vap->iv_ifp,
167 "WARNING: max aid too small, changed to %d\n",
168 vap->iv_max_aid);
169 }
170 vap->iv_aid_bitmap = (uint32_t *) IEEE80211_MALLOC(
171 howmany(vap->iv_max_aid, 32) * sizeof(uint32_t),
172 M_80211_NODE,
173 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
174 if (vap->iv_aid_bitmap == NULL) {
175 /* XXX no way to recover */
176 printf("%s: no memory for AID bitmap, max aid %d!\n",
177 __func__, vap->iv_max_aid);
178 vap->iv_max_aid = 0;
179 }
180 }
181
182 ieee80211_reset_bss(vap);
183
184 vap->iv_auth = ieee80211_authenticator_get(vap->iv_bss->ni_authmode);
185 }
186
187 void
188 ieee80211_node_vdetach(struct ieee80211vap *vap)
189 {
190 struct ieee80211com *ic = vap->iv_ic;
191
192 ieee80211_node_table_reset(&ic->ic_sta, vap);
193 if (vap->iv_bss != NULL) {
194 ieee80211_free_node(vap->iv_bss);
195 vap->iv_bss = NULL;
196 }
197 if (vap->iv_aid_bitmap != NULL) {
198 IEEE80211_FREE(vap->iv_aid_bitmap, M_80211_NODE);
199 vap->iv_aid_bitmap = NULL;
200 }
201 }
202
203 /*
204 * Port authorize/unauthorize interfaces for use by an authenticator.
205 */
206
207 void
208 ieee80211_node_authorize(struct ieee80211_node *ni)
209 {
210 struct ieee80211vap *vap = ni->ni_vap;
211
212 ni->ni_flags |= IEEE80211_NODE_AUTH;
213 ni->ni_inact_reload = vap->iv_inact_run;
214 ni->ni_inact = ni->ni_inact_reload;
215
216 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni,
217 "%s: inact_reload %u", __func__, ni->ni_inact_reload);
218 }
219
220 void
221 ieee80211_node_unauthorize(struct ieee80211_node *ni)
222 {
223 struct ieee80211vap *vap = ni->ni_vap;
224
225 ni->ni_flags &= ~IEEE80211_NODE_AUTH;
226 ni->ni_inact_reload = vap->iv_inact_auth;
227 if (ni->ni_inact > ni->ni_inact_reload)
228 ni->ni_inact = ni->ni_inact_reload;
229
230 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni,
231 "%s: inact_reload %u inact %u", __func__,
232 ni->ni_inact_reload, ni->ni_inact);
233 }
234
235 /*
236 * Fix tx parameters for a node according to ``association state''.
237 */
238 void
239 ieee80211_node_setuptxparms(struct ieee80211_node *ni)
240 {
241 struct ieee80211vap *vap = ni->ni_vap;
242 enum ieee80211_phymode mode;
243
244 if (ni->ni_flags & IEEE80211_NODE_HT) {
245 if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan))
246 mode = IEEE80211_MODE_11NA;
247 else
248 mode = IEEE80211_MODE_11NG;
249 } else { /* legacy rate handling */
250 if (IEEE80211_IS_CHAN_ST(ni->ni_chan))
251 mode = IEEE80211_MODE_STURBO_A;
252 else if (IEEE80211_IS_CHAN_HALF(ni->ni_chan))
253 mode = IEEE80211_MODE_HALF;
254 else if (IEEE80211_IS_CHAN_QUARTER(ni->ni_chan))
255 mode = IEEE80211_MODE_QUARTER;
256 /* NB: 108A should be handled as 11a */
257 else if (IEEE80211_IS_CHAN_A(ni->ni_chan))
258 mode = IEEE80211_MODE_11A;
259 else if (IEEE80211_IS_CHAN_108G(ni->ni_chan) ||
260 (ni->ni_flags & IEEE80211_NODE_ERP))
261 mode = IEEE80211_MODE_11G;
262 else
263 mode = IEEE80211_MODE_11B;
264 }
265 ni->ni_txparms = &vap->iv_txparms[mode];
266 }
267
268 /*
269 * Set/change the channel. The rate set is also updated as
270 * to insure a consistent view by drivers.
271 * XXX should be private but hostap needs it to deal with CSA
272 */
273 void
274 ieee80211_node_set_chan(struct ieee80211_node *ni,
275 struct ieee80211_channel *chan)
276 {
277 struct ieee80211com *ic = ni->ni_ic;
278 struct ieee80211vap *vap = ni->ni_vap;
279 enum ieee80211_phymode mode;
280
281 KASSERT(chan != IEEE80211_CHAN_ANYC, ("no channel"));
282
283 ni->ni_chan = chan;
284 mode = ieee80211_chan2mode(chan);
285 if (IEEE80211_IS_CHAN_HT(chan)) {
286 /*
287 * We must install the legacy rate est in ni_rates and the
288 * HT rate set in ni_htrates.
289 */
290 ni->ni_htrates = *ieee80211_get_suphtrates(ic, chan);
291 /*
292 * Setup bss tx parameters based on operating mode. We
293 * use legacy rates when operating in a mixed HT+non-HT bss
294 * and non-ERP rates in 11g for mixed ERP+non-ERP bss.
295 */
296 if (mode == IEEE80211_MODE_11NA &&
297 (vap->iv_flags_ht & IEEE80211_FHT_PUREN) == 0)
298 mode = IEEE80211_MODE_11A;
299 else if (mode == IEEE80211_MODE_11NG &&
300 (vap->iv_flags_ht & IEEE80211_FHT_PUREN) == 0)
301 mode = IEEE80211_MODE_11G;
302 if (mode == IEEE80211_MODE_11G &&
303 (vap->iv_flags & IEEE80211_F_PUREG) == 0)
304 mode = IEEE80211_MODE_11B;
305 }
306 ni->ni_txparms = &vap->iv_txparms[mode];
307 ni->ni_rates = *ieee80211_get_suprates(ic, chan);
308 }
309
310 static __inline void
311 copy_bss(struct ieee80211_node *nbss, const struct ieee80211_node *obss)
312 {
313 /* propagate useful state */
314 nbss->ni_authmode = obss->ni_authmode;
315 nbss->ni_txpower = obss->ni_txpower;
316 nbss->ni_vlan = obss->ni_vlan;
317 /* XXX statistics? */
318 /* XXX legacy WDS bssid? */
319 }
320
321 void
322 ieee80211_create_ibss(struct ieee80211vap* vap, struct ieee80211_channel *chan)
323 {
324 struct ieee80211com *ic = vap->iv_ic;
325 struct ieee80211_node *ni;
326
327 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN,
328 "%s: creating %s on channel %u%c\n", __func__,
329 ieee80211_opmode_name[vap->iv_opmode],
330 ieee80211_chan2ieee(ic, chan),
331 ieee80211_channel_type_char(chan));
332
333 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr);
334 if (ni == NULL) {
335 /* XXX recovery? */
336 return;
337 }
338 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr);
339 ni->ni_esslen = vap->iv_des_ssid[0].len;
340 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen);
341 if (vap->iv_bss != NULL)
342 copy_bss(ni, vap->iv_bss);
343 ni->ni_intval = ic->ic_bintval;
344 if (vap->iv_flags & IEEE80211_F_PRIVACY)
345 ni->ni_capinfo |= IEEE80211_CAPINFO_PRIVACY;
346 if (ic->ic_phytype == IEEE80211_T_FH) {
347 ni->ni_fhdwell = 200; /* XXX */
348 ni->ni_fhindex = 1;
349 }
350 if (vap->iv_opmode == IEEE80211_M_IBSS) {
351 vap->iv_flags |= IEEE80211_F_SIBSS;
352 ni->ni_capinfo |= IEEE80211_CAPINFO_IBSS; /* XXX */
353 if (vap->iv_flags & IEEE80211_F_DESBSSID)
354 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid);
355 else {
356 get_random_bytes(ni->ni_bssid, IEEE80211_ADDR_LEN);
357 /* clear group bit, add local bit */
358 ni->ni_bssid[0] = (ni->ni_bssid[0] &~ 0x01) | 0x02;
359 }
360 } else if (vap->iv_opmode == IEEE80211_M_AHDEMO) {
361 if (vap->iv_flags & IEEE80211_F_DESBSSID)
362 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid);
363 else
364 #ifdef IEEE80211_SUPPORT_TDMA
365 if ((vap->iv_caps & IEEE80211_C_TDMA) == 0)
366 #endif
367 memset(ni->ni_bssid, 0, IEEE80211_ADDR_LEN);
368 #ifdef IEEE80211_SUPPORT_MESH
369 } else if (vap->iv_opmode == IEEE80211_M_MBSS) {
370 ni->ni_meshidlen = vap->iv_mesh->ms_idlen;
371 memcpy(ni->ni_meshid, vap->iv_mesh->ms_id, ni->ni_meshidlen);
372 #endif
373 }
374 /*
375 * Fix the channel and related attributes.
376 */
377 /* clear DFS CAC state on previous channel */
378 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC &&
379 ic->ic_bsschan->ic_freq != chan->ic_freq &&
380 IEEE80211_IS_CHAN_CACDONE(ic->ic_bsschan))
381 ieee80211_dfs_cac_clear(ic, ic->ic_bsschan);
382 ic->ic_bsschan = chan;
383 ieee80211_node_set_chan(ni, chan);
384 ic->ic_curmode = ieee80211_chan2mode(chan);
385 /*
386 * Do mode-specific setup.
387 */
388 if (IEEE80211_IS_CHAN_FULL(chan)) {
389 if (IEEE80211_IS_CHAN_ANYG(chan)) {
390 /*
391 * Use a mixed 11b/11g basic rate set.
392 */
393 ieee80211_setbasicrates(&ni->ni_rates,
394 IEEE80211_MODE_11G);
395 if (vap->iv_flags & IEEE80211_F_PUREG) {
396 /*
397 * Also mark OFDM rates basic so 11b
398 * stations do not join (WiFi compliance).
399 */
400 ieee80211_addbasicrates(&ni->ni_rates,
401 IEEE80211_MODE_11A);
402 }
403 } else if (IEEE80211_IS_CHAN_B(chan)) {
404 /*
405 * Force pure 11b rate set.
406 */
407 ieee80211_setbasicrates(&ni->ni_rates,
408 IEEE80211_MODE_11B);
409 }
410 }
411
412 (void) ieee80211_sta_join1(ieee80211_ref_node(ni));
413 }
414
415 /*
416 * Reset bss state on transition to the INIT state.
417 * Clear any stations from the table (they have been
418 * deauth'd) and reset the bss node (clears key, rate
419 * etc. state).
420 */
421 void
422 ieee80211_reset_bss(struct ieee80211vap *vap)
423 {
424 struct ieee80211com *ic = vap->iv_ic;
425 struct ieee80211_node *ni, *obss;
426
427 ieee80211_node_table_reset(&ic->ic_sta, vap);
428 /* XXX multi-bss: wrong */
429 ieee80211_reset_erp(ic);
430
431 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr);
432 KASSERT(ni != NULL, ("unable to setup initial BSS node"));
433 obss = vap->iv_bss;
434 vap->iv_bss = ieee80211_ref_node(ni);
435 if (obss != NULL) {
436 copy_bss(ni, obss);
437 ni->ni_intval = ic->ic_bintval;
438 ieee80211_free_node(obss);
439 } else
440 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr);
441 }
442
443 static int
444 match_ssid(const struct ieee80211_node *ni,
445 int nssid, const struct ieee80211_scan_ssid ssids[])
446 {
447 int i;
448
449 for (i = 0; i < nssid; i++) {
450 if (ni->ni_esslen == ssids[i].len &&
451 memcmp(ni->ni_essid, ssids[i].ssid, ni->ni_esslen) == 0)
452 return 1;
453 }
454 return 0;
455 }
456
457 /*
458 * Test a node for suitability/compatibility.
459 */
460 static int
461 check_bss(struct ieee80211vap *vap, struct ieee80211_node *ni)
462 {
463 struct ieee80211com *ic = ni->ni_ic;
464 uint8_t rate;
465
466 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan)))
467 return 0;
468 if (vap->iv_opmode == IEEE80211_M_IBSS) {
469 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0)
470 return 0;
471 } else {
472 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0)
473 return 0;
474 }
475 if (vap->iv_flags & IEEE80211_F_PRIVACY) {
476 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0)
477 return 0;
478 } else {
479 /* XXX does this mean privacy is supported or required? */
480 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY)
481 return 0;
482 }
483 rate = ieee80211_fix_rate(ni, &ni->ni_rates,
484 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE);
485 if (rate & IEEE80211_RATE_BASIC)
486 return 0;
487 if (vap->iv_des_nssid != 0 &&
488 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid))
489 return 0;
490 if ((vap->iv_flags & IEEE80211_F_DESBSSID) &&
491 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid))
492 return 0;
493 return 1;
494 }
495
496 #ifdef IEEE80211_DEBUG
497 /*
498 * Display node suitability/compatibility.
499 */
500 static void
501 check_bss_debug(struct ieee80211vap *vap, struct ieee80211_node *ni)
502 {
503 struct ieee80211com *ic = ni->ni_ic;
504 uint8_t rate;
505 int fail;
506
507 fail = 0;
508 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan)))
509 fail |= 0x01;
510 if (vap->iv_opmode == IEEE80211_M_IBSS) {
511 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0)
512 fail |= 0x02;
513 } else {
514 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0)
515 fail |= 0x02;
516 }
517 if (vap->iv_flags & IEEE80211_F_PRIVACY) {
518 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0)
519 fail |= 0x04;
520 } else {
521 /* XXX does this mean privacy is supported or required? */
522 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY)
523 fail |= 0x04;
524 }
525 rate = ieee80211_fix_rate(ni, &ni->ni_rates,
526 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE);
527 if (rate & IEEE80211_RATE_BASIC)
528 fail |= 0x08;
529 if (vap->iv_des_nssid != 0 &&
530 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid))
531 fail |= 0x10;
532 if ((vap->iv_flags & IEEE80211_F_DESBSSID) &&
533 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid))
534 fail |= 0x20;
535
536 printf(" %c %s", fail ? '-' : '+', ether_sprintf(ni->ni_macaddr));
537 printf(" %s%c", ether_sprintf(ni->ni_bssid), fail & 0x20 ? '!' : ' ');
538 printf(" %3d%c",
539 ieee80211_chan2ieee(ic, ni->ni_chan), fail & 0x01 ? '!' : ' ');
540 printf(" %2dM%c", (rate & IEEE80211_RATE_VAL) / 2,
541 fail & 0x08 ? '!' : ' ');
542 printf(" %4s%c",
543 (ni->ni_capinfo & IEEE80211_CAPINFO_ESS) ? "ess" :
544 (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) ? "ibss" :
545 "????",
546 fail & 0x02 ? '!' : ' ');
547 printf(" %3s%c ",
548 (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) ? "wep" : "no",
549 fail & 0x04 ? '!' : ' ');
550 ieee80211_print_essid(ni->ni_essid, ni->ni_esslen);
551 printf("%s\n", fail & 0x10 ? "!" : "");
552 }
553 #endif /* IEEE80211_DEBUG */
554
555
556 int
557 ieee80211_ibss_merge_check(struct ieee80211_node *ni)
558 {
559 struct ieee80211vap *vap = ni->ni_vap;
560
561 if (ni == vap->iv_bss ||
562 IEEE80211_ADDR_EQ(ni->ni_bssid, vap->iv_bss->ni_bssid)) {
563 /* unchanged, nothing to do */
564 return 0;
565 }
566
567 if (!check_bss(vap, ni)) {
568 /* capabilities mismatch */
569 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC,
570 "%s: merge failed, capabilities mismatch\n", __func__);
571 #ifdef IEEE80211_DEBUG
572 if (ieee80211_msg_assoc(vap))
573 check_bss_debug(vap, ni);
574 #endif
575 vap->iv_stats.is_ibss_capmismatch++;
576 return 0;
577 }
578
579 return 1;
580 }
581
582 /*
583 * Check if the given node should populate the node table.
584 *
585 * We need to be in "see all beacons for all ssids" mode in order
586 * to do IBSS merges, however this means we will populate nodes for
587 * /all/ IBSS SSIDs, versus just the one we care about.
588 *
589 * So this check ensures the node can actually belong to our IBSS
590 * configuration. For now it simply checks the SSID.
591 */
592 int
593 ieee80211_ibss_node_check_new(struct ieee80211_node *ni,
594 const struct ieee80211_scanparams *scan)
595 {
596 struct ieee80211vap *vap = ni->ni_vap;
597 int i;
598
599 /*
600 * If we have no SSID and no scan SSID, return OK.
601 */
602 if (vap->iv_des_nssid == 0 && scan->ssid == NULL)
603 goto ok;
604
605 /*
606 * If we have one of (SSID, scan SSID) then return error.
607 */
608 if (!! (vap->iv_des_nssid == 0) != !! (scan->ssid == NULL))
609 goto mismatch;
610
611 /*
612 * Double-check - we need scan SSID.
613 */
614 if (scan->ssid == NULL)
615 goto mismatch;
616
617 /*
618 * Check if the scan SSID matches the SSID list for the VAP.
619 */
620 for (i = 0; i < vap->iv_des_nssid; i++) {
621
622 /* Sanity length check */
623 if (vap->iv_des_ssid[i].len != scan->ssid[1])
624 continue;
625
626 /* Note: SSID in the scan entry is the IE format */
627 if (memcmp(vap->iv_des_ssid[i].ssid, scan->ssid + 2,
628 vap->iv_des_ssid[i].len) == 0)
629 goto ok;
630 }
631
632 mismatch:
633 return (0);
634 ok:
635 return (1);
636 }
637
638 /*
639 * Handle 802.11 ad hoc network merge. The
640 * convention, set by the Wireless Ethernet Compatibility Alliance
641 * (WECA), is that an 802.11 station will change its BSSID to match
642 * the "oldest" 802.11 ad hoc network, on the same channel, that
643 * has the station's desired SSID. The "oldest" 802.11 network
644 * sends beacons with the greatest TSF timestamp.
645 *
646 * The caller is assumed to validate TSF's before attempting a merge.
647 *
648 * Return !0 if the BSSID changed, 0 otherwise.
649 */
650 int
651 ieee80211_ibss_merge(struct ieee80211_node *ni)
652 {
653 #ifdef IEEE80211_DEBUG
654 struct ieee80211vap *vap = ni->ni_vap;
655 struct ieee80211com *ic = ni->ni_ic;
656 #endif
657
658 if (! ieee80211_ibss_merge_check(ni))
659 return 0;
660
661 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC,
662 "%s: new bssid %s: %s preamble, %s slot time%s\n", __func__,
663 ether_sprintf(ni->ni_bssid),
664 ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long",
665 ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long",
666 ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : ""
667 );
668 return ieee80211_sta_join1(ieee80211_ref_node(ni));
669 }
670
671 /*
672 * Calculate HT channel promotion flags for all vaps.
673 * This assumes ni_chan have been setup for each vap.
674 */
675 static int
676 gethtadjustflags(struct ieee80211com *ic)
677 {
678 struct ieee80211vap *vap;
679 int flags;
680
681 flags = 0;
682 /* XXX locking */
683 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
684 if (vap->iv_state < IEEE80211_S_RUN)
685 continue;
686 switch (vap->iv_opmode) {
687 case IEEE80211_M_WDS:
688 case IEEE80211_M_STA:
689 case IEEE80211_M_AHDEMO:
690 case IEEE80211_M_HOSTAP:
691 case IEEE80211_M_IBSS:
692 case IEEE80211_M_MBSS:
693 flags |= ieee80211_htchanflags(vap->iv_bss->ni_chan);
694 break;
695 default:
696 break;
697 }
698 }
699 return flags;
700 }
701
702 /*
703 * Check if the current channel needs to change based on whether
704 * any vap's are using HT20/HT40. This is used to sync the state
705 * of ic_curchan after a channel width change on a running vap.
706 */
707 void
708 ieee80211_sync_curchan(struct ieee80211com *ic)
709 {
710 struct ieee80211_channel *c;
711
712 c = ieee80211_ht_adjust_channel(ic, ic->ic_curchan, gethtadjustflags(ic));
713 if (c != ic->ic_curchan) {
714 ic->ic_curchan = c;
715 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan);
716 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan);
717 IEEE80211_UNLOCK(ic);
718 ic->ic_set_channel(ic);
719 ieee80211_radiotap_chan_change(ic);
720 IEEE80211_LOCK(ic);
721 }
722 }
723
724 /*
725 * Setup the current channel. The request channel may be
726 * promoted if other vap's are operating with HT20/HT40.
727 */
728 void
729 ieee80211_setupcurchan(struct ieee80211com *ic, struct ieee80211_channel *c)
730 {
731 if (ic->ic_htcaps & IEEE80211_HTC_HT) {
732 int flags = gethtadjustflags(ic);
733 /*
734 * Check for channel promotion required to support the
735 * set of running vap's. This assumes we are called
736 * after ni_chan is setup for each vap.
737 */
738 /* NB: this assumes IEEE80211_FHT_USEHT40 > IEEE80211_FHT_HT */
739 if (flags > ieee80211_htchanflags(c))
740 c = ieee80211_ht_adjust_channel(ic, c, flags);
741 }
742 ic->ic_bsschan = ic->ic_curchan = c;
743 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan);
744 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan);
745 }
746
747 /*
748 * Change the current channel. The channel change is guaranteed to have
749 * happened before the next state change.
750 */
751 void
752 ieee80211_setcurchan(struct ieee80211com *ic, struct ieee80211_channel *c)
753 {
754 ieee80211_setupcurchan(ic, c);
755 ieee80211_runtask(ic, &ic->ic_chan_task);
756 }
757
758 void
759 ieee80211_update_chw(struct ieee80211com *ic)
760 {
761
762 ieee80211_setupcurchan(ic, ic->ic_curchan);
763 ieee80211_runtask(ic, &ic->ic_chw_task);
764 }
765
766 /*
767 * Join the specified IBSS/BSS network. The node is assumed to
768 * be passed in with a held reference.
769 */
770 static int
771 ieee80211_sta_join1(struct ieee80211_node *selbs)
772 {
773 struct ieee80211vap *vap = selbs->ni_vap;
774 struct ieee80211com *ic = selbs->ni_ic;
775 struct ieee80211_node *obss;
776 int canreassoc;
777
778 /*
779 * Committed to selbs, setup state.
780 */
781 obss = vap->iv_bss;
782 /*
783 * Check if old+new node have the same address in which
784 * case we can reassociate when operating in sta mode.
785 */
786 canreassoc = (obss != NULL &&
787 vap->iv_state == IEEE80211_S_RUN &&
788 IEEE80211_ADDR_EQ(obss->ni_macaddr, selbs->ni_macaddr));
789 vap->iv_bss = selbs; /* NB: caller assumed to bump refcnt */
790 if (obss != NULL) {
791 struct ieee80211_node_table *nt = obss->ni_table;
792
793 copy_bss(selbs, obss);
794 ieee80211_node_decref(obss); /* iv_bss reference */
795
796 IEEE80211_NODE_LOCK(nt);
797 node_reclaim(nt, obss); /* station table reference */
798 IEEE80211_NODE_UNLOCK(nt);
799
800 obss = NULL; /* NB: guard against later use */
801 }
802
803 /*
804 * Delete unusable rates; we've already checked
805 * that the negotiated rate set is acceptable.
806 */
807 ieee80211_fix_rate(vap->iv_bss, &vap->iv_bss->ni_rates,
808 IEEE80211_F_DODEL | IEEE80211_F_JOIN);
809
810 ieee80211_setcurchan(ic, selbs->ni_chan);
811 /*
812 * Set the erp state (mostly the slot time) to deal with
813 * the auto-select case; this should be redundant if the
814 * mode is locked.
815 */
816 ieee80211_reset_erp(ic);
817 ieee80211_wme_initparams(vap);
818
819 if (vap->iv_opmode == IEEE80211_M_STA) {
820 if (canreassoc) {
821 /* Reassociate */
822 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 1);
823 } else {
824 /*
825 * Act as if we received a DEAUTH frame in case we
826 * are invoked from the RUN state. This will cause
827 * us to try to re-authenticate if we are operating
828 * as a station.
829 */
830 ieee80211_new_state(vap, IEEE80211_S_AUTH,
831 IEEE80211_FC0_SUBTYPE_DEAUTH);
832 }
833 } else
834 ieee80211_new_state(vap, IEEE80211_S_RUN, -1);
835 return 1;
836 }
837
838 int
839 ieee80211_sta_join(struct ieee80211vap *vap, struct ieee80211_channel *chan,
840 const struct ieee80211_scan_entry *se)
841 {
842 struct ieee80211com *ic = vap->iv_ic;
843 struct ieee80211_node *ni;
844
845 ni = ieee80211_alloc_node(&ic->ic_sta, vap, se->se_macaddr);
846 if (ni == NULL) {
847 /* XXX msg */
848 return 0;
849 }
850
851 /*
852 * Expand scan state into node's format.
853 * XXX may not need all this stuff
854 */
855 IEEE80211_ADDR_COPY(ni->ni_bssid, se->se_bssid);
856 ni->ni_esslen = se->se_ssid[1];
857 memcpy(ni->ni_essid, se->se_ssid+2, ni->ni_esslen);
858 ni->ni_tstamp.tsf = se->se_tstamp.tsf;
859 ni->ni_intval = se->se_intval;
860 ni->ni_capinfo = se->se_capinfo;
861 ni->ni_chan = chan;
862 ni->ni_timoff = se->se_timoff;
863 ni->ni_fhdwell = se->se_fhdwell;
864 ni->ni_fhindex = se->se_fhindex;
865 ni->ni_erp = se->se_erp;
866 IEEE80211_RSSI_LPF(ni->ni_avgrssi, se->se_rssi);
867 ni->ni_noise = se->se_noise;
868 if (vap->iv_opmode == IEEE80211_M_STA) {
869 /* NB: only infrastructure mode requires an associd */
870 ni->ni_flags |= IEEE80211_NODE_ASSOCID;
871 }
872
873 if (ieee80211_ies_init(&ni->ni_ies, se->se_ies.data, se->se_ies.len)) {
874 ieee80211_ies_expand(&ni->ni_ies);
875 #ifdef IEEE80211_SUPPORT_SUPERG
876 if (ni->ni_ies.ath_ie != NULL)
877 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie);
878 #endif
879 if (ni->ni_ies.htcap_ie != NULL)
880 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie);
881 if (ni->ni_ies.htinfo_ie != NULL)
882 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie);
883 #ifdef IEEE80211_SUPPORT_MESH
884 if (ni->ni_ies.meshid_ie != NULL)
885 ieee80211_parse_meshid(ni, ni->ni_ies.meshid_ie);
886 #endif
887 #ifdef IEEE80211_SUPPORT_TDMA
888 if (ni->ni_ies.tdma_ie != NULL)
889 ieee80211_parse_tdma(ni, ni->ni_ies.tdma_ie);
890 #endif
891 }
892
893 vap->iv_dtim_period = se->se_dtimperiod;
894 vap->iv_dtim_count = 0;
895
896 /* NB: must be after ni_chan is setup */
897 ieee80211_setup_rates(ni, se->se_rates, se->se_xrates,
898 IEEE80211_F_DOSORT);
899 if (ieee80211_iserp_rateset(&ni->ni_rates))
900 ni->ni_flags |= IEEE80211_NODE_ERP;
901
902 /*
903 * Setup HT state for this node if it's available, otherwise
904 * non-STA modes won't pick this state up.
905 *
906 * For IBSS and related modes that don't go through an
907 * association request/response, the only appropriate place
908 * to setup the HT state is here.
909 */
910 if (ni->ni_ies.htinfo_ie != NULL &&
911 ni->ni_ies.htcap_ie != NULL &&
912 vap->iv_flags_ht & IEEE80211_FHT_HT) {
913 ieee80211_ht_node_init(ni);
914 ieee80211_ht_updateparams(ni,
915 ni->ni_ies.htcap_ie,
916 ni->ni_ies.htinfo_ie);
917 ieee80211_setup_htrates(ni, ni->ni_ies.htcap_ie,
918 IEEE80211_F_JOIN | IEEE80211_F_DOBRS);
919 ieee80211_setup_basic_htrates(ni, ni->ni_ies.htinfo_ie);
920 }
921 /* XXX else check for ath FF? */
922 /* XXX QoS? Difficult given that WME config is specific to a master */
923
924 ieee80211_node_setuptxparms(ni);
925 ieee80211_ratectl_node_init(ni);
926
927 return ieee80211_sta_join1(ieee80211_ref_node(ni));
928 }
929
930 /*
931 * Leave the specified IBSS/BSS network. The node is assumed to
932 * be passed in with a held reference.
933 */
934 void
935 ieee80211_sta_leave(struct ieee80211_node *ni)
936 {
937 struct ieee80211com *ic = ni->ni_ic;
938
939 ic->ic_node_cleanup(ni);
940 ieee80211_notify_node_leave(ni);
941 }
942
943 /*
944 * Send a deauthenticate frame and drop the station.
945 */
946 void
947 ieee80211_node_deauth(struct ieee80211_node *ni, int reason)
948 {
949 /* NB: bump the refcnt to be sure temporary nodes are not reclaimed */
950 ieee80211_ref_node(ni);
951 if (ni->ni_associd != 0)
952 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH, reason);
953 ieee80211_node_leave(ni);
954 ieee80211_free_node(ni);
955 }
956
957 static struct ieee80211_node *
958 node_alloc(struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN])
959 {
960 struct ieee80211_node *ni;
961
962 ni = (struct ieee80211_node *) IEEE80211_MALLOC(sizeof(struct ieee80211_node),
963 M_80211_NODE, IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
964 return ni;
965 }
966
967 /*
968 * Initialize an ie blob with the specified data. If previous
969 * data exists re-use the data block. As a side effect we clear
970 * all references to specific ie's; the caller is required to
971 * recalculate them.
972 */
973 int
974 ieee80211_ies_init(struct ieee80211_ies *ies, const uint8_t *data, int len)
975 {
976 /* NB: assumes data+len are the last fields */
977 memset(ies, 0, offsetof(struct ieee80211_ies, data));
978 if (ies->data != NULL && ies->len != len) {
979 /* data size changed */
980 IEEE80211_FREE(ies->data, M_80211_NODE_IE);
981 ies->data = NULL;
982 }
983 if (ies->data == NULL) {
984 ies->data = (uint8_t *) IEEE80211_MALLOC(len, M_80211_NODE_IE,
985 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
986 if (ies->data == NULL) {
987 ies->len = 0;
988 /* NB: pointers have already been zero'd above */
989 return 0;
990 }
991 }
992 memcpy(ies->data, data, len);
993 ies->len = len;
994 return 1;
995 }
996
997 /*
998 * Reclaim storage for an ie blob.
999 */
1000 void
1001 ieee80211_ies_cleanup(struct ieee80211_ies *ies)
1002 {
1003 if (ies->data != NULL)
1004 IEEE80211_FREE(ies->data, M_80211_NODE_IE);
1005 }
1006
1007 /*
1008 * Expand an ie blob data contents and to fillin individual
1009 * ie pointers. The data blob is assumed to be well-formed;
1010 * we don't do any validity checking of ie lengths.
1011 */
1012 void
1013 ieee80211_ies_expand(struct ieee80211_ies *ies)
1014 {
1015 uint8_t *ie;
1016 int ielen;
1017
1018 ie = ies->data;
1019 ielen = ies->len;
1020 while (ielen > 0) {
1021 switch (ie[0]) {
1022 case IEEE80211_ELEMID_VENDOR:
1023 if (iswpaoui(ie))
1024 ies->wpa_ie = ie;
1025 else if (iswmeoui(ie))
1026 ies->wme_ie = ie;
1027 #ifdef IEEE80211_SUPPORT_SUPERG
1028 else if (isatherosoui(ie))
1029 ies->ath_ie = ie;
1030 #endif
1031 #ifdef IEEE80211_SUPPORT_TDMA
1032 else if (istdmaoui(ie))
1033 ies->tdma_ie = ie;
1034 #endif
1035 break;
1036 case IEEE80211_ELEMID_RSN:
1037 ies->rsn_ie = ie;
1038 break;
1039 case IEEE80211_ELEMID_HTCAP:
1040 ies->htcap_ie = ie;
1041 break;
1042 case IEEE80211_ELEMID_HTINFO:
1043 ies->htinfo_ie = ie;
1044 break;
1045 #ifdef IEEE80211_SUPPORT_MESH
1046 case IEEE80211_ELEMID_MESHID:
1047 ies->meshid_ie = ie;
1048 break;
1049 #endif
1050 }
1051 ielen -= 2 + ie[1];
1052 ie += 2 + ie[1];
1053 }
1054 }
1055
1056 /*
1057 * Reclaim any resources in a node and reset any critical
1058 * state. Typically nodes are free'd immediately after,
1059 * but in some cases the storage may be reused so we need
1060 * to insure consistent state (should probably fix that).
1061 */
1062 static void
1063 node_cleanup(struct ieee80211_node *ni)
1064 {
1065 struct ieee80211vap *vap = ni->ni_vap;
1066 struct ieee80211com *ic = ni->ni_ic;
1067 int i;
1068
1069 /* NB: preserve ni_table */
1070 if (ni->ni_flags & IEEE80211_NODE_PWR_MGT) {
1071 if (vap->iv_opmode != IEEE80211_M_STA)
1072 vap->iv_ps_sta--;
1073 ni->ni_flags &= ~IEEE80211_NODE_PWR_MGT;
1074 IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni,
1075 "power save mode off, %u sta's in ps mode", vap->iv_ps_sta);
1076 }
1077 /*
1078 * Cleanup any HT-related state.
1079 */
1080 if (ni->ni_flags & IEEE80211_NODE_HT)
1081 ieee80211_ht_node_cleanup(ni);
1082 #ifdef IEEE80211_SUPPORT_SUPERG
1083 /* Always do FF node cleanup; for A-MSDU */
1084 ieee80211_ff_node_cleanup(ni);
1085 #endif
1086 #ifdef IEEE80211_SUPPORT_MESH
1087 /*
1088 * Cleanup any mesh-related state.
1089 */
1090 if (vap->iv_opmode == IEEE80211_M_MBSS)
1091 ieee80211_mesh_node_cleanup(ni);
1092 #endif
1093 /*
1094 * Clear any staging queue entries.
1095 */
1096 ieee80211_ageq_drain_node(&ic->ic_stageq, ni);
1097
1098 /*
1099 * Clear AREF flag that marks the authorization refcnt bump
1100 * has happened. This is probably not needed as the node
1101 * should always be removed from the table so not found but
1102 * do it just in case.
1103 * Likewise clear the ASSOCID flag as these flags are intended
1104 * to be managed in tandem.
1105 */
1106 ni->ni_flags &= ~(IEEE80211_NODE_AREF | IEEE80211_NODE_ASSOCID);
1107
1108 /*
1109 * Drain power save queue and, if needed, clear TIM.
1110 */
1111 if (ieee80211_node_psq_drain(ni) != 0 && vap->iv_set_tim != NULL)
1112 vap->iv_set_tim(ni, 0);
1113
1114 ni->ni_associd = 0;
1115 if (ni->ni_challenge != NULL) {
1116 IEEE80211_FREE(ni->ni_challenge, M_80211_NODE);
1117 ni->ni_challenge = NULL;
1118 }
1119 /*
1120 * Preserve SSID, WPA, and WME ie's so the bss node is
1121 * reusable during a re-auth/re-assoc state transition.
1122 * If we remove these data they will not be recreated
1123 * because they come from a probe-response or beacon frame
1124 * which cannot be expected prior to the association-response.
1125 * This should not be an issue when operating in other modes
1126 * as stations leaving always go through a full state transition
1127 * which will rebuild this state.
1128 *
1129 * XXX does this leave us open to inheriting old state?
1130 */
1131 for (i = 0; i < nitems(ni->ni_rxfrag); i++)
1132 if (ni->ni_rxfrag[i] != NULL) {
1133 m_freem(ni->ni_rxfrag[i]);
1134 ni->ni_rxfrag[i] = NULL;
1135 }
1136 /*
1137 * Must be careful here to remove any key map entry w/o a LOR.
1138 */
1139 ieee80211_node_delucastkey(ni);
1140 }
1141
1142 static void
1143 node_free(struct ieee80211_node *ni)
1144 {
1145 struct ieee80211com *ic = ni->ni_ic;
1146
1147 ieee80211_ratectl_node_deinit(ni);
1148 ic->ic_node_cleanup(ni);
1149 ieee80211_ies_cleanup(&ni->ni_ies);
1150 ieee80211_psq_cleanup(&ni->ni_psq);
1151 IEEE80211_FREE(ni, M_80211_NODE);
1152 }
1153
1154 static void
1155 node_age(struct ieee80211_node *ni)
1156 {
1157 struct ieee80211vap *vap = ni->ni_vap;
1158
1159 /*
1160 * Age frames on the power save queue.
1161 */
1162 if (ieee80211_node_psq_age(ni) != 0 &&
1163 ni->ni_psq.psq_len == 0 && vap->iv_set_tim != NULL)
1164 vap->iv_set_tim(ni, 0);
1165 /*
1166 * Age out HT resources (e.g. frames on the
1167 * A-MPDU reorder queues).
1168 */
1169 if (ni->ni_associd != 0 && (ni->ni_flags & IEEE80211_NODE_HT))
1170 ieee80211_ht_node_age(ni);
1171 }
1172
1173 static int8_t
1174 node_getrssi(const struct ieee80211_node *ni)
1175 {
1176 uint32_t avgrssi = ni->ni_avgrssi;
1177 int32_t rssi;
1178
1179 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER)
1180 return 0;
1181 rssi = IEEE80211_RSSI_GET(avgrssi);
1182 return rssi < 0 ? 0 : rssi > 127 ? 127 : rssi;
1183 }
1184
1185 static void
1186 node_getsignal(const struct ieee80211_node *ni, int8_t *rssi, int8_t *noise)
1187 {
1188 *rssi = node_getrssi(ni);
1189 *noise = ni->ni_noise;
1190 }
1191
1192 static void
1193 node_getmimoinfo(const struct ieee80211_node *ni,
1194 struct ieee80211_mimo_info *info)
1195 {
1196 int i;
1197 uint32_t avgrssi;
1198 int32_t rssi;
1199
1200 bzero(info, sizeof(*info));
1201
1202 for (i = 0; i < ni->ni_mimo_chains; i++) {
1203 avgrssi = ni->ni_mimo_rssi_ctl[i];
1204 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) {
1205 info->rssi[i] = 0;
1206 } else {
1207 rssi = IEEE80211_RSSI_GET(avgrssi);
1208 info->rssi[i] = rssi < 0 ? 0 : rssi > 127 ? 127 : rssi;
1209 }
1210 info->noise[i] = ni->ni_mimo_noise_ctl[i];
1211 }
1212
1213 /* XXX ext radios? */
1214
1215 /* XXX EVM? */
1216 }
1217
1218 struct ieee80211_node *
1219 ieee80211_alloc_node(struct ieee80211_node_table *nt,
1220 struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN])
1221 {
1222 struct ieee80211com *ic = nt->nt_ic;
1223 struct ieee80211_node *ni;
1224 int hash;
1225
1226 ni = ic->ic_node_alloc(vap, macaddr);
1227 if (ni == NULL) {
1228 vap->iv_stats.is_rx_nodealloc++;
1229 return NULL;
1230 }
1231
1232 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1233 "%s %p<%s> in %s table\n", __func__, ni,
1234 ether_sprintf(macaddr), nt->nt_name);
1235
1236 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr);
1237 hash = IEEE80211_NODE_HASH(ic, macaddr);
1238 ieee80211_node_initref(ni); /* mark referenced */
1239 ni->ni_chan = IEEE80211_CHAN_ANYC;
1240 ni->ni_authmode = IEEE80211_AUTH_OPEN;
1241 ni->ni_txpower = ic->ic_txpowlimit; /* max power */
1242 ni->ni_txparms = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)];
1243 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE);
1244 ni->ni_avgrssi = IEEE80211_RSSI_DUMMY_MARKER;
1245 ni->ni_inact_reload = nt->nt_inact_init;
1246 ni->ni_inact = ni->ni_inact_reload;
1247 ni->ni_ath_defkeyix = 0x7fff;
1248 ieee80211_psq_init(&ni->ni_psq, "unknown");
1249 #ifdef IEEE80211_SUPPORT_MESH
1250 if (vap->iv_opmode == IEEE80211_M_MBSS)
1251 ieee80211_mesh_node_init(vap, ni);
1252 #endif
1253 IEEE80211_NODE_LOCK(nt);
1254 TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list);
1255 LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash);
1256 ni->ni_table = nt;
1257 ni->ni_vap = vap;
1258 ni->ni_ic = ic;
1259 IEEE80211_NODE_UNLOCK(nt);
1260
1261 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni,
1262 "%s: inact_reload %u", __func__, ni->ni_inact_reload);
1263
1264 return ni;
1265 }
1266
1267 /*
1268 * Craft a temporary node suitable for sending a management frame
1269 * to the specified station. We craft only as much state as we
1270 * need to do the work since the node will be immediately reclaimed
1271 * once the send completes.
1272 */
1273 struct ieee80211_node *
1274 ieee80211_tmp_node(struct ieee80211vap *vap,
1275 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1276 {
1277 struct ieee80211com *ic = vap->iv_ic;
1278 struct ieee80211_node *ni;
1279
1280 ni = ic->ic_node_alloc(vap, macaddr);
1281 if (ni != NULL) {
1282 struct ieee80211_node *bss = vap->iv_bss;
1283
1284 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1285 "%s %p<%s>\n", __func__, ni, ether_sprintf(macaddr));
1286
1287 ni->ni_table = NULL; /* NB: pedantic */
1288 ni->ni_ic = ic; /* NB: needed to set channel */
1289 ni->ni_vap = vap;
1290
1291 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr);
1292 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid);
1293 ieee80211_node_initref(ni); /* mark referenced */
1294 /* NB: required by ieee80211_fix_rate */
1295 ieee80211_node_set_chan(ni, bss->ni_chan);
1296 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey,
1297 IEEE80211_KEYIX_NONE);
1298 ni->ni_txpower = bss->ni_txpower;
1299 /* XXX optimize away */
1300 ieee80211_psq_init(&ni->ni_psq, "unknown");
1301
1302 ieee80211_ratectl_node_init(ni);
1303 } else {
1304 /* XXX msg */
1305 vap->iv_stats.is_rx_nodealloc++;
1306 }
1307 return ni;
1308 }
1309
1310 struct ieee80211_node *
1311 ieee80211_dup_bss(struct ieee80211vap *vap,
1312 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1313 {
1314 struct ieee80211com *ic = vap->iv_ic;
1315 struct ieee80211_node *ni;
1316
1317 ni = ieee80211_alloc_node(&ic->ic_sta, vap, macaddr);
1318 if (ni != NULL) {
1319 struct ieee80211_node *bss = vap->iv_bss;
1320 /*
1321 * Inherit from iv_bss.
1322 */
1323 copy_bss(ni, bss);
1324 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid);
1325 ieee80211_node_set_chan(ni, bss->ni_chan);
1326 }
1327 return ni;
1328 }
1329
1330 /*
1331 * Create a bss node for a legacy WDS vap. The far end does
1332 * not associate so we just create create a new node and
1333 * simulate an association. The caller is responsible for
1334 * installing the node as the bss node and handling any further
1335 * setup work like authorizing the port.
1336 */
1337 struct ieee80211_node *
1338 ieee80211_node_create_wds(struct ieee80211vap *vap,
1339 const uint8_t bssid[IEEE80211_ADDR_LEN], struct ieee80211_channel *chan)
1340 {
1341 struct ieee80211com *ic = vap->iv_ic;
1342 struct ieee80211_node *ni;
1343
1344 /* XXX check if node already in sta table? */
1345 ni = ieee80211_alloc_node(&ic->ic_sta, vap, bssid);
1346 if (ni != NULL) {
1347 ni->ni_wdsvap = vap;
1348 IEEE80211_ADDR_COPY(ni->ni_bssid, bssid);
1349 /*
1350 * Inherit any manually configured settings.
1351 */
1352 copy_bss(ni, vap->iv_bss);
1353 ieee80211_node_set_chan(ni, chan);
1354 /* NB: propagate ssid so available to WPA supplicant */
1355 ni->ni_esslen = vap->iv_des_ssid[0].len;
1356 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen);
1357 /* NB: no associd for peer */
1358 /*
1359 * There are no management frames to use to
1360 * discover neighbor capabilities, so blindly
1361 * propagate the local configuration.
1362 */
1363 if (vap->iv_flags & IEEE80211_F_WME)
1364 ni->ni_flags |= IEEE80211_NODE_QOS;
1365 #ifdef IEEE80211_SUPPORT_SUPERG
1366 if (vap->iv_flags & IEEE80211_F_FF)
1367 ni->ni_flags |= IEEE80211_NODE_FF;
1368 #endif
1369 if ((ic->ic_htcaps & IEEE80211_HTC_HT) &&
1370 (vap->iv_flags_ht & IEEE80211_FHT_HT)) {
1371 /*
1372 * Device is HT-capable and HT is enabled for
1373 * the vap; setup HT operation. On return
1374 * ni_chan will be adjusted to an HT channel.
1375 */
1376 ieee80211_ht_wds_init(ni);
1377 } else {
1378 struct ieee80211_channel *c = ni->ni_chan;
1379 /*
1380 * Force a legacy channel to be used.
1381 */
1382 c = ieee80211_find_channel(ic,
1383 c->ic_freq, c->ic_flags &~ IEEE80211_CHAN_HT);
1384 KASSERT(c != NULL, ("no legacy channel, %u/%x",
1385 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags));
1386 ni->ni_chan = c;
1387 }
1388 }
1389 return ni;
1390 }
1391
1392 struct ieee80211_node *
1393 #ifdef IEEE80211_DEBUG_REFCNT
1394 ieee80211_find_node_locked_debug(struct ieee80211_node_table *nt,
1395 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line)
1396 #else
1397 ieee80211_find_node_locked(struct ieee80211_node_table *nt,
1398 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1399 #endif
1400 {
1401 struct ieee80211_node *ni;
1402 int hash;
1403
1404 IEEE80211_NODE_LOCK_ASSERT(nt);
1405
1406 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr);
1407 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) {
1408 if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) {
1409 ieee80211_ref_node(ni); /* mark referenced */
1410 #ifdef IEEE80211_DEBUG_REFCNT
1411 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1412 "%s (%s:%u) %p<%s> refcnt %d\n", __func__,
1413 func, line,
1414 ni, ether_sprintf(ni->ni_macaddr),
1415 ieee80211_node_refcnt(ni));
1416 #endif
1417 return ni;
1418 }
1419 }
1420 return NULL;
1421 }
1422
1423 struct ieee80211_node *
1424 #ifdef IEEE80211_DEBUG_REFCNT
1425 ieee80211_find_node_debug(struct ieee80211_node_table *nt,
1426 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line)
1427 #else
1428 ieee80211_find_node(struct ieee80211_node_table *nt,
1429 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1430 #endif
1431 {
1432 struct ieee80211_node *ni;
1433
1434 IEEE80211_NODE_LOCK(nt);
1435 ni = ieee80211_find_node_locked(nt, macaddr);
1436 IEEE80211_NODE_UNLOCK(nt);
1437 return ni;
1438 }
1439
1440 struct ieee80211_node *
1441 #ifdef IEEE80211_DEBUG_REFCNT
1442 ieee80211_find_vap_node_locked_debug(struct ieee80211_node_table *nt,
1443 const struct ieee80211vap *vap,
1444 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line)
1445 #else
1446 ieee80211_find_vap_node_locked(struct ieee80211_node_table *nt,
1447 const struct ieee80211vap *vap,
1448 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1449 #endif
1450 {
1451 struct ieee80211_node *ni;
1452 int hash;
1453
1454 IEEE80211_NODE_LOCK_ASSERT(nt);
1455
1456 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr);
1457 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) {
1458 if (ni->ni_vap == vap &&
1459 IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) {
1460 ieee80211_ref_node(ni); /* mark referenced */
1461 #ifdef IEEE80211_DEBUG_REFCNT
1462 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1463 "%s (%s:%u) %p<%s> refcnt %d\n", __func__,
1464 func, line,
1465 ni, ether_sprintf(ni->ni_macaddr),
1466 ieee80211_node_refcnt(ni));
1467 #endif
1468 return ni;
1469 }
1470 }
1471 return NULL;
1472 }
1473
1474 struct ieee80211_node *
1475 #ifdef IEEE80211_DEBUG_REFCNT
1476 ieee80211_find_vap_node_debug(struct ieee80211_node_table *nt,
1477 const struct ieee80211vap *vap,
1478 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line)
1479 #else
1480 ieee80211_find_vap_node(struct ieee80211_node_table *nt,
1481 const struct ieee80211vap *vap,
1482 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1483 #endif
1484 {
1485 struct ieee80211_node *ni;
1486
1487 IEEE80211_NODE_LOCK(nt);
1488 ni = ieee80211_find_vap_node_locked(nt, vap, macaddr);
1489 IEEE80211_NODE_UNLOCK(nt);
1490 return ni;
1491 }
1492
1493 /*
1494 * Fake up a node; this handles node discovery in adhoc mode.
1495 * Note that for the driver's benefit we we treat this like
1496 * an association so the driver has an opportunity to setup
1497 * it's private state.
1498 */
1499 struct ieee80211_node *
1500 ieee80211_fakeup_adhoc_node(struct ieee80211vap *vap,
1501 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1502 {
1503 struct ieee80211_node *ni;
1504
1505 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE | IEEE80211_MSG_ASSOC,
1506 "%s: mac<%s>\n", __func__, ether_sprintf(macaddr));
1507 ni = ieee80211_dup_bss(vap, macaddr);
1508 if (ni != NULL) {
1509 struct ieee80211com *ic = vap->iv_ic;
1510
1511 /* XXX no rate negotiation; just dup */
1512 ni->ni_rates = vap->iv_bss->ni_rates;
1513 if (ieee80211_iserp_rateset(&ni->ni_rates))
1514 ni->ni_flags |= IEEE80211_NODE_ERP;
1515 if (vap->iv_opmode == IEEE80211_M_AHDEMO) {
1516 /*
1517 * In adhoc demo mode there are no management
1518 * frames to use to discover neighbor capabilities,
1519 * so blindly propagate the local configuration
1520 * so we can do interesting things (e.g. use
1521 * WME to disable ACK's).
1522 */
1523 if (vap->iv_flags & IEEE80211_F_WME)
1524 ni->ni_flags |= IEEE80211_NODE_QOS;
1525 #ifdef IEEE80211_SUPPORT_SUPERG
1526 if (vap->iv_flags & IEEE80211_F_FF)
1527 ni->ni_flags |= IEEE80211_NODE_FF;
1528 #endif
1529 }
1530 ieee80211_node_setuptxparms(ni);
1531 ieee80211_ratectl_node_init(ni);
1532 if (ic->ic_newassoc != NULL)
1533 ic->ic_newassoc(ni, 1);
1534 /* XXX not right for 802.1x/WPA */
1535 ieee80211_node_authorize(ni);
1536 }
1537 return ni;
1538 }
1539
1540 void
1541 ieee80211_init_neighbor(struct ieee80211_node *ni,
1542 const struct ieee80211_frame *wh,
1543 const struct ieee80211_scanparams *sp)
1544 {
1545 int do_ht_setup = 0;
1546
1547 ni->ni_esslen = sp->ssid[1];
1548 memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]);
1549 IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3);
1550 memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp));
1551 ni->ni_intval = sp->bintval;
1552 ni->ni_capinfo = sp->capinfo;
1553 ni->ni_chan = ni->ni_ic->ic_curchan;
1554 ni->ni_fhdwell = sp->fhdwell;
1555 ni->ni_fhindex = sp->fhindex;
1556 ni->ni_erp = sp->erp;
1557 ni->ni_timoff = sp->timoff;
1558 #ifdef IEEE80211_SUPPORT_MESH
1559 if (ni->ni_vap->iv_opmode == IEEE80211_M_MBSS)
1560 ieee80211_mesh_init_neighbor(ni, wh, sp);
1561 #endif
1562 if (ieee80211_ies_init(&ni->ni_ies, sp->ies, sp->ies_len)) {
1563 ieee80211_ies_expand(&ni->ni_ies);
1564 if (ni->ni_ies.wme_ie != NULL)
1565 ni->ni_flags |= IEEE80211_NODE_QOS;
1566 else
1567 ni->ni_flags &= ~IEEE80211_NODE_QOS;
1568 #ifdef IEEE80211_SUPPORT_SUPERG
1569 if (ni->ni_ies.ath_ie != NULL)
1570 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie);
1571 #endif
1572 if (ni->ni_ies.htcap_ie != NULL)
1573 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie);
1574 if (ni->ni_ies.htinfo_ie != NULL)
1575 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie);
1576
1577 if ((ni->ni_ies.htcap_ie != NULL) &&
1578 (ni->ni_ies.htinfo_ie != NULL) &&
1579 (ni->ni_vap->iv_flags_ht & IEEE80211_FHT_HT)) {
1580 do_ht_setup = 1;
1581 }
1582 }
1583
1584 /* NB: must be after ni_chan is setup */
1585 ieee80211_setup_rates(ni, sp->rates, sp->xrates,
1586 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE |
1587 IEEE80211_F_DONEGO | IEEE80211_F_DODEL);
1588
1589 /*
1590 * If the neighbor is HT compatible, flip that on.
1591 */
1592 if (do_ht_setup) {
1593 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC,
1594 "%s: doing HT setup\n", __func__);
1595 ieee80211_ht_node_init(ni);
1596 ieee80211_ht_updateparams(ni,
1597 ni->ni_ies.htcap_ie,
1598 ni->ni_ies.htinfo_ie);
1599 ieee80211_setup_htrates(ni,
1600 ni->ni_ies.htcap_ie,
1601 IEEE80211_F_JOIN | IEEE80211_F_DOBRS);
1602 ieee80211_setup_basic_htrates(ni,
1603 ni->ni_ies.htinfo_ie);
1604 ieee80211_node_setuptxparms(ni);
1605 ieee80211_ratectl_node_init(ni);
1606 }
1607 }
1608
1609 /*
1610 * Do node discovery in adhoc mode on receipt of a beacon
1611 * or probe response frame. Note that for the driver's
1612 * benefit we we treat this like an association so the
1613 * driver has an opportunity to setup it's private state.
1614 */
1615 struct ieee80211_node *
1616 ieee80211_add_neighbor(struct ieee80211vap *vap,
1617 const struct ieee80211_frame *wh,
1618 const struct ieee80211_scanparams *sp)
1619 {
1620 struct ieee80211_node *ni;
1621
1622 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC,
1623 "%s: mac<%s>\n", __func__, ether_sprintf(wh->i_addr2));
1624 ni = ieee80211_dup_bss(vap, wh->i_addr2);/* XXX alloc_node? */
1625 if (ni != NULL) {
1626 struct ieee80211com *ic = vap->iv_ic;
1627
1628 ieee80211_init_neighbor(ni, wh, sp);
1629 if (ieee80211_iserp_rateset(&ni->ni_rates))
1630 ni->ni_flags |= IEEE80211_NODE_ERP;
1631 ieee80211_node_setuptxparms(ni);
1632 ieee80211_ratectl_node_init(ni);
1633 if (ic->ic_newassoc != NULL)
1634 ic->ic_newassoc(ni, 1);
1635 /* XXX not right for 802.1x/WPA */
1636 ieee80211_node_authorize(ni);
1637 }
1638 return ni;
1639 }
1640
1641 #define IS_PROBEREQ(wh) \
1642 ((wh->i_fc[0] & (IEEE80211_FC0_TYPE_MASK|IEEE80211_FC0_SUBTYPE_MASK)) \
1643 == (IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ))
1644 #define IS_BCAST_PROBEREQ(wh) \
1645 (IS_PROBEREQ(wh) && IEEE80211_IS_MULTICAST( \
1646 ((const struct ieee80211_frame *)(wh))->i_addr3))
1647
1648 static __inline struct ieee80211_node *
1649 _find_rxnode(struct ieee80211_node_table *nt,
1650 const struct ieee80211_frame_min *wh)
1651 {
1652 if (IS_BCAST_PROBEREQ(wh))
1653 return NULL; /* spam bcast probe req to all vap's */
1654 return ieee80211_find_node_locked(nt, wh->i_addr2);
1655 }
1656
1657 /*
1658 * Locate the node for sender, track state, and then pass the
1659 * (referenced) node up to the 802.11 layer for its use. Note
1660 * we can return NULL if the sender is not in the table.
1661 */
1662 struct ieee80211_node *
1663 #ifdef IEEE80211_DEBUG_REFCNT
1664 ieee80211_find_rxnode_debug(struct ieee80211com *ic,
1665 const struct ieee80211_frame_min *wh, const char *func, int line)
1666 #else
1667 ieee80211_find_rxnode(struct ieee80211com *ic,
1668 const struct ieee80211_frame_min *wh)
1669 #endif
1670 {
1671 struct ieee80211_node_table *nt;
1672 struct ieee80211_node *ni;
1673
1674 nt = &ic->ic_sta;
1675 IEEE80211_NODE_LOCK(nt);
1676 ni = _find_rxnode(nt, wh);
1677 IEEE80211_NODE_UNLOCK(nt);
1678
1679 return ni;
1680 }
1681
1682 /*
1683 * Like ieee80211_find_rxnode but use the supplied h/w
1684 * key index as a hint to locate the node in the key
1685 * mapping table. If an entry is present at the key
1686 * index we return it; otherwise do a normal lookup and
1687 * update the mapping table if the station has a unicast
1688 * key assigned to it.
1689 */
1690 struct ieee80211_node *
1691 #ifdef IEEE80211_DEBUG_REFCNT
1692 ieee80211_find_rxnode_withkey_debug(struct ieee80211com *ic,
1693 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix,
1694 const char *func, int line)
1695 #else
1696 ieee80211_find_rxnode_withkey(struct ieee80211com *ic,
1697 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix)
1698 #endif
1699 {
1700 struct ieee80211_node_table *nt;
1701 struct ieee80211_node *ni;
1702
1703 nt = &ic->ic_sta;
1704 IEEE80211_NODE_LOCK(nt);
1705 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax)
1706 ni = nt->nt_keyixmap[keyix];
1707 else
1708 ni = NULL;
1709 if (ni == NULL) {
1710 ni = _find_rxnode(nt, wh);
1711 if (ni != NULL && nt->nt_keyixmap != NULL) {
1712 /*
1713 * If the station has a unicast key cache slot
1714 * assigned update the key->node mapping table.
1715 */
1716 keyix = ni->ni_ucastkey.wk_rxkeyix;
1717 /* XXX can keyixmap[keyix] != NULL? */
1718 if (keyix < nt->nt_keyixmax &&
1719 nt->nt_keyixmap[keyix] == NULL) {
1720 IEEE80211_DPRINTF(ni->ni_vap,
1721 IEEE80211_MSG_NODE,
1722 "%s: add key map entry %p<%s> refcnt %d\n",
1723 __func__, ni, ether_sprintf(ni->ni_macaddr),
1724 ieee80211_node_refcnt(ni)+1);
1725 nt->nt_keyixmap[keyix] = ieee80211_ref_node(ni);
1726 }
1727 }
1728 } else {
1729 if (IS_BCAST_PROBEREQ(wh))
1730 ni = NULL; /* spam bcast probe req to all vap's */
1731 else
1732 ieee80211_ref_node(ni);
1733 }
1734 IEEE80211_NODE_UNLOCK(nt);
1735
1736 return ni;
1737 }
1738 #undef IS_BCAST_PROBEREQ
1739 #undef IS_PROBEREQ
1740
1741 /*
1742 * Return a reference to the appropriate node for sending
1743 * a data frame. This handles node discovery in adhoc networks.
1744 */
1745 struct ieee80211_node *
1746 #ifdef IEEE80211_DEBUG_REFCNT
1747 ieee80211_find_txnode_debug(struct ieee80211vap *vap,
1748 const uint8_t macaddr[IEEE80211_ADDR_LEN],
1749 const char *func, int line)
1750 #else
1751 ieee80211_find_txnode(struct ieee80211vap *vap,
1752 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1753 #endif
1754 {
1755 struct ieee80211_node_table *nt = &vap->iv_ic->ic_sta;
1756 struct ieee80211_node *ni;
1757
1758 /*
1759 * The destination address should be in the node table
1760 * unless this is a multicast/broadcast frame. We can
1761 * also optimize station mode operation, all frames go
1762 * to the bss node.
1763 */
1764 /* XXX can't hold lock across dup_bss 'cuz of recursive locking */
1765 IEEE80211_NODE_LOCK(nt);
1766 if (vap->iv_opmode == IEEE80211_M_STA ||
1767 vap->iv_opmode == IEEE80211_M_WDS ||
1768 IEEE80211_IS_MULTICAST(macaddr))
1769 ni = ieee80211_ref_node(vap->iv_bss);
1770 else
1771 ni = ieee80211_find_node_locked(nt, macaddr);
1772 IEEE80211_NODE_UNLOCK(nt);
1773
1774 if (ni == NULL) {
1775 if (vap->iv_opmode == IEEE80211_M_IBSS ||
1776 vap->iv_opmode == IEEE80211_M_AHDEMO) {
1777 /*
1778 * In adhoc mode cons up a node for the destination.
1779 * Note that we need an additional reference for the
1780 * caller to be consistent with
1781 * ieee80211_find_node_locked.
1782 */
1783 ni = ieee80211_fakeup_adhoc_node(vap, macaddr);
1784 if (ni != NULL)
1785 (void) ieee80211_ref_node(ni);
1786 } else {
1787 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, macaddr,
1788 "no node, discard frame (%s)", __func__);
1789 vap->iv_stats.is_tx_nonode++;
1790 }
1791 }
1792 return ni;
1793 }
1794
1795 static void
1796 _ieee80211_free_node(struct ieee80211_node *ni)
1797 {
1798 struct ieee80211_node_table *nt = ni->ni_table;
1799
1800 /*
1801 * NB: careful about referencing the vap as it may be
1802 * gone if the last reference was held by a driver.
1803 * We know the com will always be present so it's safe
1804 * to use ni_ic below to reclaim resources.
1805 */
1806 #if 0
1807 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1808 "%s %p<%s> in %s table\n", __func__, ni,
1809 ether_sprintf(ni->ni_macaddr),
1810 nt != NULL ? nt->nt_name : "<gone>");
1811 #endif
1812 if (ni->ni_associd != 0) {
1813 struct ieee80211vap *vap = ni->ni_vap;
1814 if (vap->iv_aid_bitmap != NULL)
1815 IEEE80211_AID_CLR(vap, ni->ni_associd);
1816 }
1817 if (nt != NULL) {
1818 TAILQ_REMOVE(&nt->nt_node, ni, ni_list);
1819 LIST_REMOVE(ni, ni_hash);
1820 }
1821 ni->ni_ic->ic_node_free(ni);
1822 }
1823
1824 /*
1825 * Clear any entry in the unicast key mapping table.
1826 */
1827 static int
1828 node_clear_keyixmap(struct ieee80211_node_table *nt, struct ieee80211_node *ni)
1829 {
1830 ieee80211_keyix keyix;
1831
1832 keyix = ni->ni_ucastkey.wk_rxkeyix;
1833 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax &&
1834 nt->nt_keyixmap[keyix] == ni) {
1835 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1836 "%s: %p<%s> clear key map entry %u\n",
1837 __func__, ni, ether_sprintf(ni->ni_macaddr), keyix);
1838 nt->nt_keyixmap[keyix] = NULL;
1839 ieee80211_node_decref(ni);
1840 return 1;
1841 }
1842
1843 return 0;
1844 }
1845
1846 void
1847 #ifdef IEEE80211_DEBUG_REFCNT
1848 ieee80211_free_node_debug(struct ieee80211_node *ni, const char *func, int line)
1849 #else
1850 ieee80211_free_node(struct ieee80211_node *ni)
1851 #endif
1852 {
1853 struct ieee80211_node_table *nt = ni->ni_table;
1854
1855 #ifdef IEEE80211_DEBUG_REFCNT
1856 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1857 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni,
1858 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1);
1859 #endif
1860 if (nt != NULL) {
1861 IEEE80211_NODE_LOCK(nt);
1862 if (ieee80211_node_dectestref(ni)) {
1863 /*
1864 * Last reference, reclaim state.
1865 */
1866 _ieee80211_free_node(ni);
1867 } else if (ieee80211_node_refcnt(ni) == 1)
1868 if (node_clear_keyixmap(nt, ni))
1869 _ieee80211_free_node(ni);
1870 IEEE80211_NODE_UNLOCK(nt);
1871 } else {
1872 if (ieee80211_node_dectestref(ni))
1873 _ieee80211_free_node(ni);
1874 }
1875 }
1876
1877 /*
1878 * Reclaim a unicast key and clear any key cache state.
1879 */
1880 int
1881 ieee80211_node_delucastkey(struct ieee80211_node *ni)
1882 {
1883 struct ieee80211com *ic = ni->ni_ic;
1884 struct ieee80211_node_table *nt = &ic->ic_sta;
1885 struct ieee80211_node *nikey;
1886 ieee80211_keyix keyix;
1887 int isowned, status;
1888
1889 /*
1890 * NB: We must beware of LOR here; deleting the key
1891 * can cause the crypto layer to block traffic updates
1892 * which can generate a LOR against the node table lock;
1893 * grab it here and stash the key index for our use below.
1894 *
1895 * Must also beware of recursion on the node table lock.
1896 * When called from node_cleanup we may already have
1897 * the node table lock held. Unfortunately there's no
1898 * way to separate out this path so we must do this
1899 * conditionally.
1900 */
1901 isowned = IEEE80211_NODE_IS_LOCKED(nt);
1902 if (!isowned)
1903 IEEE80211_NODE_LOCK(nt);
1904 nikey = NULL;
1905 status = 1; /* NB: success */
1906 if (ni->ni_ucastkey.wk_keyix != IEEE80211_KEYIX_NONE) {
1907 keyix = ni->ni_ucastkey.wk_rxkeyix;
1908 status = ieee80211_crypto_delkey(ni->ni_vap, &ni->ni_ucastkey);
1909 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) {
1910 nikey = nt->nt_keyixmap[keyix];
1911 nt->nt_keyixmap[keyix] = NULL;
1912 }
1913 }
1914 if (!isowned)
1915 IEEE80211_NODE_UNLOCK(nt);
1916
1917 if (nikey != NULL) {
1918 KASSERT(nikey == ni,
1919 ("key map out of sync, ni %p nikey %p", ni, nikey));
1920 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1921 "%s: delete key map entry %p<%s> refcnt %d\n",
1922 __func__, ni, ether_sprintf(ni->ni_macaddr),
1923 ieee80211_node_refcnt(ni)-1);
1924 ieee80211_free_node(ni);
1925 }
1926 return status;
1927 }
1928
1929 /*
1930 * Reclaim a node. If this is the last reference count then
1931 * do the normal free work. Otherwise remove it from the node
1932 * table and mark it gone by clearing the back-reference.
1933 */
1934 static void
1935 node_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni)
1936 {
1937
1938 IEEE80211_NODE_LOCK_ASSERT(nt);
1939
1940 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1941 "%s: remove %p<%s> from %s table, refcnt %d\n",
1942 __func__, ni, ether_sprintf(ni->ni_macaddr),
1943 nt->nt_name, ieee80211_node_refcnt(ni)-1);
1944 /*
1945 * Clear any entry in the unicast key mapping table.
1946 * We need to do it here so rx lookups don't find it
1947 * in the mapping table even if it's not in the hash
1948 * table. We cannot depend on the mapping table entry
1949 * being cleared because the node may not be free'd.
1950 */
1951 (void)node_clear_keyixmap(nt, ni);
1952 if (!ieee80211_node_dectestref(ni)) {
1953 /*
1954 * Other references are present, just remove the
1955 * node from the table so it cannot be found. When
1956 * the references are dropped storage will be
1957 * reclaimed.
1958 */
1959 TAILQ_REMOVE(&nt->nt_node, ni, ni_list);
1960 LIST_REMOVE(ni, ni_hash);
1961 ni->ni_table = NULL; /* clear reference */
1962 } else
1963 _ieee80211_free_node(ni);
1964 }
1965
1966 /*
1967 * Node table support.
1968 */
1969
1970 static void
1971 ieee80211_node_table_init(struct ieee80211com *ic,
1972 struct ieee80211_node_table *nt,
1973 const char *name, int inact, int keyixmax)
1974 {
1975
1976 nt->nt_ic = ic;
1977 IEEE80211_NODE_LOCK_INIT(nt, ic->ic_name);
1978 TAILQ_INIT(&nt->nt_node);
1979 nt->nt_name = name;
1980 nt->nt_inact_init = inact;
1981 nt->nt_keyixmax = keyixmax;
1982 if (nt->nt_keyixmax > 0) {
1983 nt->nt_keyixmap = (struct ieee80211_node **) IEEE80211_MALLOC(
1984 keyixmax * sizeof(struct ieee80211_node *),
1985 M_80211_NODE,
1986 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
1987 if (nt->nt_keyixmap == NULL)
1988 ic_printf(ic,
1989 "Cannot allocate key index map with %u entries\n",
1990 keyixmax);
1991 } else
1992 nt->nt_keyixmap = NULL;
1993 }
1994
1995 static void
1996 ieee80211_node_table_reset(struct ieee80211_node_table *nt,
1997 struct ieee80211vap *match)
1998 {
1999 struct ieee80211_node *ni, *next;
2000
2001 IEEE80211_NODE_LOCK(nt);
2002 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) {
2003 if (match != NULL && ni->ni_vap != match)
2004 continue;
2005 /* XXX can this happen? if so need's work */
2006 if (ni->ni_associd != 0) {
2007 struct ieee80211vap *vap = ni->ni_vap;
2008
2009 if (vap->iv_auth->ia_node_leave != NULL)
2010 vap->iv_auth->ia_node_leave(ni);
2011 if (vap->iv_aid_bitmap != NULL)
2012 IEEE80211_AID_CLR(vap, ni->ni_associd);
2013 }
2014 ni->ni_wdsvap = NULL; /* clear reference */
2015 node_reclaim(nt, ni);
2016 }
2017 if (match != NULL && match->iv_opmode == IEEE80211_M_WDS) {
2018 /*
2019 * Make a separate pass to clear references to this vap
2020 * held by DWDS entries. They will not be matched above
2021 * because ni_vap will point to the ap vap but we still
2022 * need to clear ni_wdsvap when the WDS vap is destroyed
2023 * and/or reset.
2024 */
2025 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next)
2026 if (ni->ni_wdsvap == match)
2027 ni->ni_wdsvap = NULL;
2028 }
2029 IEEE80211_NODE_UNLOCK(nt);
2030 }
2031
2032 static void
2033 ieee80211_node_table_cleanup(struct ieee80211_node_table *nt)
2034 {
2035 ieee80211_node_table_reset(nt, NULL);
2036 if (nt->nt_keyixmap != NULL) {
2037 #ifdef DIAGNOSTIC
2038 /* XXX verify all entries are NULL */
2039 int i;
2040 for (i = 0; i < nt->nt_keyixmax; i++)
2041 if (nt->nt_keyixmap[i] != NULL)
2042 printf("%s: %s[%u] still active\n", __func__,
2043 nt->nt_name, i);
2044 #endif
2045 IEEE80211_FREE(nt->nt_keyixmap, M_80211_NODE);
2046 nt->nt_keyixmap = NULL;
2047 }
2048 IEEE80211_NODE_LOCK_DESTROY(nt);
2049 }
2050
2051 static void
2052 timeout_stations(void *arg __unused, struct ieee80211_node *ni)
2053 {
2054 struct ieee80211com *ic = ni->ni_ic;
2055 struct ieee80211vap *vap = ni->ni_vap;
2056
2057 /*
2058 * Only process stations when in RUN state. This
2059 * insures, for example, that we don't timeout an
2060 * inactive station during CAC. Note that CSA state
2061 * is actually handled in ieee80211_node_timeout as
2062 * it applies to more than timeout processing.
2063 */
2064 if (vap->iv_state != IEEE80211_S_RUN)
2065 return;
2066 /*
2067 * Ignore entries for which have yet to receive an
2068 * authentication frame. These are transient and
2069 * will be reclaimed when the last reference to them
2070 * goes away (when frame xmits complete).
2071 */
2072 if ((vap->iv_opmode == IEEE80211_M_HOSTAP ||
2073 vap->iv_opmode == IEEE80211_M_STA) &&
2074 (ni->ni_flags & IEEE80211_NODE_AREF) == 0)
2075 return;
2076 /*
2077 * Free fragment if not needed anymore
2078 * (last fragment older than 1s).
2079 * XXX doesn't belong here, move to node_age
2080 */
2081 if (ni->ni_rxfrag[0] != NULL &&
2082 ticks > ni->ni_rxfragstamp + hz) {
2083 m_freem(ni->ni_rxfrag[0]);
2084 ni->ni_rxfrag[0] = NULL;
2085 }
2086 if (ni->ni_inact > 0) {
2087 ni->ni_inact--;
2088 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni,
2089 "%s: inact %u inact_reload %u nrates %u",
2090 __func__, ni->ni_inact, ni->ni_inact_reload,
2091 ni->ni_rates.rs_nrates);
2092 }
2093 /*
2094 * Special case ourself; we may be idle for extended periods
2095 * of time and regardless reclaiming our state is wrong.
2096 * XXX run ic_node_age
2097 */
2098 /* XXX before inact decrement? */
2099 if (ni == vap->iv_bss)
2100 return;
2101 if (ni->ni_associd != 0 ||
2102 (vap->iv_opmode == IEEE80211_M_IBSS ||
2103 vap->iv_opmode == IEEE80211_M_AHDEMO)) {
2104 /*
2105 * Age/drain resources held by the station.
2106 */
2107 ic->ic_node_age(ni);
2108 /*
2109 * Probe the station before time it out. We
2110 * send a null data frame which may not be
2111 * universally supported by drivers (need it
2112 * for ps-poll support so it should be...).
2113 *
2114 * XXX don't probe the station unless we've
2115 * received a frame from them (and have
2116 * some idea of the rates they are capable
2117 * of); this will get fixed more properly
2118 * soon with better handling of the rate set.
2119 */
2120 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) &&
2121 (0 < ni->ni_inact &&
2122 ni->ni_inact <= vap->iv_inact_probe) &&
2123 ni->ni_rates.rs_nrates != 0) {
2124 IEEE80211_NOTE(vap,
2125 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE,
2126 ni, "%s",
2127 "probe station due to inactivity");
2128 /*
2129 * Grab a reference so the node cannot
2130 * be reclaimed before we send the frame.
2131 * ieee80211_send_nulldata understands
2132 * we've done this and reclaims the
2133 * ref for us as needed.
2134 */
2135 /* XXX fix this (not required anymore). */
2136 ieee80211_ref_node(ni);
2137 /* XXX useless */
2138 ieee80211_send_nulldata(ni);
2139 /* XXX stat? */
2140 return;
2141 }
2142 }
2143 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) &&
2144 ni->ni_inact <= 0) {
2145 IEEE80211_NOTE(vap,
2146 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, ni,
2147 "station timed out due to inactivity "
2148 "(refcnt %u)", ieee80211_node_refcnt(ni));
2149 /*
2150 * Send a deauthenticate frame and drop the station.
2151 * This is somewhat complicated due to reference counts
2152 * and locking. At this point a station will typically
2153 * have a reference count of 2. ieee80211_node_leave
2154 * will do a "free" of the node which will drop the
2155 * reference count. But in the meantime a reference
2156 * wil be held by the deauth frame. The actual reclaim
2157 * of the node will happen either after the tx is
2158 * completed or by ieee80211_node_leave.
2159 */
2160 if (ni->ni_associd != 0) {
2161 IEEE80211_SEND_MGMT(ni,
2162 IEEE80211_FC0_SUBTYPE_DEAUTH,
2163 IEEE80211_REASON_AUTH_EXPIRE);
2164 }
2165 ieee80211_node_leave(ni);
2166 vap->iv_stats.is_node_timeout++;
2167 }
2168 }
2169
2170 /*
2171 * Timeout inactive stations and do related housekeeping.
2172 */
2173 static void
2174 ieee80211_timeout_stations(struct ieee80211com *ic)
2175 {
2176 struct ieee80211_node_table *nt = &ic->ic_sta;
2177
2178 ieee80211_iterate_nodes(nt, timeout_stations, NULL);
2179 }
2180
2181 /*
2182 * Aggressively reclaim resources. This should be used
2183 * only in a critical situation to reclaim mbuf resources.
2184 */
2185 void
2186 ieee80211_drain(struct ieee80211com *ic)
2187 {
2188 struct ieee80211_node_table *nt = &ic->ic_sta;
2189 struct ieee80211vap *vap;
2190 struct ieee80211_node *ni;
2191
2192 IEEE80211_NODE_LOCK(nt);
2193 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) {
2194 /*
2195 * Ignore entries for which have yet to receive an
2196 * authentication frame. These are transient and
2197 * will be reclaimed when the last reference to them
2198 * goes away (when frame xmits complete).
2199 */
2200 vap = ni->ni_vap;
2201 /*
2202 * Only process stations when in RUN state. This
2203 * insures, for example, that we don't timeout an
2204 * inactive station during CAC. Note that CSA state
2205 * is actually handled in ieee80211_node_timeout as
2206 * it applies to more than timeout processing.
2207 */
2208 if (vap->iv_state != IEEE80211_S_RUN)
2209 continue;
2210 /* XXX can vap be NULL? */
2211 if ((vap->iv_opmode == IEEE80211_M_HOSTAP ||
2212 vap->iv_opmode == IEEE80211_M_STA) &&
2213 (ni->ni_flags & IEEE80211_NODE_AREF) == 0)
2214 continue;
2215 /*
2216 * Free fragments.
2217 * XXX doesn't belong here, move to node_drain
2218 */
2219 if (ni->ni_rxfrag[0] != NULL) {
2220 m_freem(ni->ni_rxfrag[0]);
2221 ni->ni_rxfrag[0] = NULL;
2222 }
2223 /*
2224 * Drain resources held by the station.
2225 */
2226 ic->ic_node_drain(ni);
2227 }
2228 IEEE80211_NODE_UNLOCK(nt);
2229 }
2230
2231 /*
2232 * Per-ieee80211com inactivity timer callback.
2233 */
2234 void
2235 ieee80211_node_timeout(void *arg)
2236 {
2237 struct ieee80211com *ic = arg;
2238
2239 /*
2240 * Defer timeout processing if a channel switch is pending.
2241 * We typically need to be mute so not doing things that
2242 * might generate frames is good to handle in one place.
2243 * Suppressing the station timeout processing may extend the
2244 * lifetime of inactive stations (by not decrementing their
2245 * idle counters) but this should be ok unless the CSA is
2246 * active for an unusually long time.
2247 */
2248 if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) {
2249 ieee80211_scan_timeout(ic);
2250 ieee80211_timeout_stations(ic);
2251 ieee80211_ageq_age(&ic->ic_stageq, IEEE80211_INACT_WAIT);
2252
2253 IEEE80211_LOCK(ic);
2254 ieee80211_erp_timeout(ic);
2255 ieee80211_ht_timeout(ic);
2256 IEEE80211_UNLOCK(ic);
2257 }
2258 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz,
2259 ieee80211_node_timeout, ic);
2260 }
2261
2262 /*
2263 * Iterate over the node table and return an array of ref'ed nodes.
2264 *
2265 * This is separated out from calling the actual node function so that
2266 * no LORs will occur.
2267 *
2268 * If there are too many nodes (ie, the number of nodes doesn't fit
2269 * within 'max_aid' entries) then the node references will be freed
2270 * and an error will be returned.
2271 *
2272 * The responsibility of allocating and freeing "ni_arr" is up to
2273 * the caller.
2274 */
2275 int
2276 ieee80211_iterate_nt(struct ieee80211_node_table *nt,
2277 struct ieee80211_node **ni_arr, uint16_t max_aid)
2278 {
2279 int i, j, ret;
2280 struct ieee80211_node *ni;
2281
2282 IEEE80211_NODE_LOCK(nt);
2283
2284 i = ret = 0;
2285 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) {
2286 if (i >= max_aid) {
2287 ret = E2BIG;
2288 ic_printf(nt->nt_ic, "Node array overflow: max=%u",
2289 max_aid);
2290 break;
2291 }
2292 ni_arr[i] = ieee80211_ref_node(ni);
2293 i++;
2294 }
2295
2296 /*
2297 * It's safe to unlock here.
2298 *
2299 * If we're successful, the list is returned.
2300 * If we're unsuccessful, the list is ignored
2301 * and we remove our references.
2302 *
2303 * This avoids any potential LOR with
2304 * ieee80211_free_node().
2305 */
2306 IEEE80211_NODE_UNLOCK(nt);
2307
2308 /*
2309 * If ret is non-zero, we hit some kind of error.
2310 * Rather than walking some nodes, we'll walk none
2311 * of them.
2312 */
2313 if (ret) {
2314 for (j = 0; j < i; j++) {
2315 /* ieee80211_free_node() locks by itself */
2316 ieee80211_free_node(ni_arr[j]);
2317 }
2318 }
2319
2320 return (ret);
2321 }
2322
2323 /*
2324 * Just a wrapper, so we don't have to change every ieee80211_iterate_nodes()
2325 * reference in the source.
2326 *
2327 * Note that this fetches 'max_aid' from the first VAP, rather than finding
2328 * the largest max_aid from all VAPs.
2329 */
2330 void
2331 ieee80211_iterate_nodes(struct ieee80211_node_table *nt,
2332 ieee80211_iter_func *f, void *arg)
2333 {
2334 struct ieee80211_node **ni_arr;
2335 size_t size;
2336 int i;
2337 uint16_t max_aid;
2338 struct ieee80211vap *vap;
2339
2340 /* Overdoing it default */
2341 max_aid = IEEE80211_AID_MAX;
2342
2343 /* Handle the case of there being no vaps just yet */
2344 vap = TAILQ_FIRST(&nt->nt_ic->ic_vaps);
2345 if (vap != NULL)
2346 max_aid = vap->iv_max_aid;
2347
2348 size = max_aid * sizeof(struct ieee80211_node *);
2349 ni_arr = (struct ieee80211_node **) IEEE80211_MALLOC(size, M_80211_NODE,
2350 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
2351 if (ni_arr == NULL)
2352 return;
2353
2354 /*
2355 * If this fails, the node table won't have any
2356 * valid entries - ieee80211_iterate_nt() frees
2357 * the references to them. So don't try walking
2358 * the table; just skip to the end and free the
2359 * temporary memory.
2360 */
2361 if (ieee80211_iterate_nt(nt, ni_arr, max_aid) != 0)
2362 goto done;
2363
2364 for (i = 0; i < max_aid; i++) {
2365 if (ni_arr[i] == NULL) /* end of the list */
2366 break;
2367 (*f)(arg, ni_arr[i]);
2368 /* ieee80211_free_node() locks by itself */
2369 ieee80211_free_node(ni_arr[i]);
2370 }
2371
2372 done:
2373 IEEE80211_FREE(ni_arr, M_80211_NODE);
2374 }
2375
2376 void
2377 ieee80211_dump_node(struct ieee80211_node_table *nt, struct ieee80211_node *ni)
2378 {
2379 printf("0x%p: mac %s refcnt %d\n", ni,
2380 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni));
2381 printf("\tauthmode %u flags 0x%x\n",
2382 ni->ni_authmode, ni->ni_flags);
2383 printf("\tassocid 0x%x txpower %u vlan %u\n",
2384 ni->ni_associd, ni->ni_txpower, ni->ni_vlan);
2385 printf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n",
2386 ni->ni_txseqs[IEEE80211_NONQOS_TID],
2387 ni->ni_rxseqs[IEEE80211_NONQOS_TID] >> IEEE80211_SEQ_SEQ_SHIFT,
2388 ni->ni_rxseqs[IEEE80211_NONQOS_TID] & IEEE80211_SEQ_FRAG_MASK,
2389 ni->ni_rxfragstamp);
2390 printf("\trssi %d noise %d intval %u capinfo 0x%x\n",
2391 node_getrssi(ni), ni->ni_noise,
2392 ni->ni_intval, ni->ni_capinfo);
2393 printf("\tbssid %s essid \"%.*s\" channel %u:0x%x\n",
2394 ether_sprintf(ni->ni_bssid),
2395 ni->ni_esslen, ni->ni_essid,
2396 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags);
2397 printf("\tinact %u inact_reload %u txrate %u\n",
2398 ni->ni_inact, ni->ni_inact_reload, ni->ni_txrate);
2399 printf("\thtcap %x htparam %x htctlchan %u ht2ndchan %u\n",
2400 ni->ni_htcap, ni->ni_htparam,
2401 ni->ni_htctlchan, ni->ni_ht2ndchan);
2402 printf("\thtopmode %x htstbc %x chw %u\n",
2403 ni->ni_htopmode, ni->ni_htstbc, ni->ni_chw);
2404 }
2405
2406 void
2407 ieee80211_dump_nodes(struct ieee80211_node_table *nt)
2408 {
2409 ieee80211_iterate_nodes(nt,
2410 (ieee80211_iter_func *) ieee80211_dump_node, nt);
2411 }
2412
2413 static void
2414 ieee80211_notify_erp_locked(struct ieee80211com *ic)
2415 {
2416 struct ieee80211vap *vap;
2417
2418 IEEE80211_LOCK_ASSERT(ic);
2419
2420 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
2421 if (vap->iv_opmode == IEEE80211_M_HOSTAP)
2422 ieee80211_beacon_notify(vap, IEEE80211_BEACON_ERP);
2423 }
2424
2425 void
2426 ieee80211_notify_erp(struct ieee80211com *ic)
2427 {
2428 IEEE80211_LOCK(ic);
2429 ieee80211_notify_erp_locked(ic);
2430 IEEE80211_UNLOCK(ic);
2431 }
2432
2433 /*
2434 * Handle a station joining an 11g network.
2435 */
2436 static void
2437 ieee80211_node_join_11g(struct ieee80211_node *ni)
2438 {
2439 struct ieee80211com *ic = ni->ni_ic;
2440
2441 IEEE80211_LOCK_ASSERT(ic);
2442
2443 /*
2444 * Station isn't capable of short slot time. Bump
2445 * the count of long slot time stations and disable
2446 * use of short slot time. Note that the actual switch
2447 * over to long slot time use may not occur until the
2448 * next beacon transmission (per sec. 7.3.1.4 of 11g).
2449 */
2450 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) {
2451 ic->ic_longslotsta++;
2452 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2453 "station needs long slot time, count %d",
2454 ic->ic_longslotsta);
2455 /* XXX vap's w/ conflicting needs won't work */
2456 if (!IEEE80211_IS_CHAN_108G(ic->ic_bsschan)) {
2457 /*
2458 * Don't force slot time when switched to turbo
2459 * mode as non-ERP stations won't be present; this
2460 * need only be done when on the normal G channel.
2461 */
2462 ieee80211_set_shortslottime(ic, 0);
2463 }
2464 }
2465 /*
2466 * If the new station is not an ERP station
2467 * then bump the counter and enable protection
2468 * if configured.
2469 */
2470 if (!ieee80211_iserp_rateset(&ni->ni_rates)) {
2471 ic->ic_nonerpsta++;
2472 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2473 "station is !ERP, %d non-ERP stations associated",
2474 ic->ic_nonerpsta);
2475 /*
2476 * If station does not support short preamble
2477 * then we must enable use of Barker preamble.
2478 */
2479 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) {
2480 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2481 "%s", "station needs long preamble");
2482 ic->ic_flags |= IEEE80211_F_USEBARKER;
2483 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE;
2484 }
2485 /*
2486 * If protection is configured and this is the first
2487 * indication we should use protection, enable it.
2488 */
2489 if (ic->ic_protmode != IEEE80211_PROT_NONE &&
2490 ic->ic_nonerpsta == 1 &&
2491 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) {
2492 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC,
2493 "%s: enable use of protection\n", __func__);
2494 ic->ic_flags |= IEEE80211_F_USEPROT;
2495 ieee80211_notify_erp_locked(ic);
2496 }
2497 } else
2498 ni->ni_flags |= IEEE80211_NODE_ERP;
2499 }
2500
2501 void
2502 ieee80211_node_join(struct ieee80211_node *ni, int resp)
2503 {
2504 struct ieee80211com *ic = ni->ni_ic;
2505 struct ieee80211vap *vap = ni->ni_vap;
2506 int newassoc;
2507
2508 if (ni->ni_associd == 0) {
2509 uint16_t aid;
2510
2511 KASSERT(vap->iv_aid_bitmap != NULL, ("no aid bitmap"));
2512 /*
2513 * It would be good to search the bitmap
2514 * more efficiently, but this will do for now.
2515 */
2516 for (aid = 1; aid < vap->iv_max_aid; aid++) {
2517 if (!IEEE80211_AID_ISSET(vap, aid))
2518 break;
2519 }
2520 if (aid >= vap->iv_max_aid) {
2521 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_TOOMANY);
2522 ieee80211_node_leave(ni);
2523 return;
2524 }
2525 ni->ni_associd = aid | 0xc000;
2526 ni->ni_jointime = time_uptime;
2527 IEEE80211_LOCK(ic);
2528 IEEE80211_AID_SET(vap, ni->ni_associd);
2529 vap->iv_sta_assoc++;
2530 ic->ic_sta_assoc++;
2531
2532 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan))
2533 ieee80211_ht_node_join(ni);
2534 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) &&
2535 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan))
2536 ieee80211_node_join_11g(ni);
2537 IEEE80211_UNLOCK(ic);
2538
2539 newassoc = 1;
2540 } else
2541 newassoc = 0;
2542
2543 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni,
2544 "station associated at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s",
2545 IEEE80211_NODE_AID(ni),
2546 ic->ic_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long",
2547 ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long",
2548 ic->ic_flags & IEEE80211_F_USEPROT ? ", protection" : "",
2549 ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "",
2550 ni->ni_flags & IEEE80211_NODE_HT ?
2551 (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "",
2552 ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "",
2553 ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" :
2554 ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "",
2555 ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "",
2556 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ?
2557 ", fast-frames" : "",
2558 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ?
2559 ", turbo" : ""
2560 );
2561
2562 ieee80211_node_setuptxparms(ni);
2563 ieee80211_ratectl_node_init(ni);
2564 /* give driver a chance to setup state like ni_txrate */
2565 if (ic->ic_newassoc != NULL)
2566 ic->ic_newassoc(ni, newassoc);
2567 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_SUCCESS);
2568 /* tell the authenticator about new station */
2569 if (vap->iv_auth->ia_node_join != NULL)
2570 vap->iv_auth->ia_node_join(ni);
2571 ieee80211_notify_node_join(ni,
2572 resp == IEEE80211_FC0_SUBTYPE_ASSOC_RESP);
2573 }
2574
2575 static void
2576 disable_protection(struct ieee80211com *ic)
2577 {
2578 KASSERT(ic->ic_nonerpsta == 0 &&
2579 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0,
2580 ("%d non ERP stations, flags 0x%x", ic->ic_nonerpsta,
2581 ic->ic_flags_ext));
2582
2583 ic->ic_flags &= ~IEEE80211_F_USEPROT;
2584 /* XXX verify mode? */
2585 if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) {
2586 ic->ic_flags |= IEEE80211_F_SHPREAMBLE;
2587 ic->ic_flags &= ~IEEE80211_F_USEBARKER;
2588 }
2589 ieee80211_notify_erp_locked(ic);
2590 }
2591
2592 /*
2593 * Handle a station leaving an 11g network.
2594 */
2595 static void
2596 ieee80211_node_leave_11g(struct ieee80211_node *ni)
2597 {
2598 struct ieee80211com *ic = ni->ni_ic;
2599
2600 IEEE80211_LOCK_ASSERT(ic);
2601
2602 KASSERT(IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan),
2603 ("not in 11g, bss %u:0x%x", ic->ic_bsschan->ic_freq,
2604 ic->ic_bsschan->ic_flags));
2605
2606 /*
2607 * If a long slot station do the slot time bookkeeping.
2608 */
2609 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) {
2610 KASSERT(ic->ic_longslotsta > 0,
2611 ("bogus long slot station count %d", ic->ic_longslotsta));
2612 ic->ic_longslotsta--;
2613 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2614 "long slot time station leaves, count now %d",
2615 ic->ic_longslotsta);
2616 if (ic->ic_longslotsta == 0) {
2617 /*
2618 * Re-enable use of short slot time if supported
2619 * and not operating in IBSS mode (per spec).
2620 */
2621 if ((ic->ic_caps & IEEE80211_C_SHSLOT) &&
2622 ic->ic_opmode != IEEE80211_M_IBSS) {
2623 IEEE80211_DPRINTF(ni->ni_vap,
2624 IEEE80211_MSG_ASSOC,
2625 "%s: re-enable use of short slot time\n",
2626 __func__);
2627 ieee80211_set_shortslottime(ic, 1);
2628 }
2629 }
2630 }
2631 /*
2632 * If a non-ERP station do the protection-related bookkeeping.
2633 */
2634 if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) {
2635 KASSERT(ic->ic_nonerpsta > 0,
2636 ("bogus non-ERP station count %d", ic->ic_nonerpsta));
2637 ic->ic_nonerpsta--;
2638 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2639 "non-ERP station leaves, count now %d%s", ic->ic_nonerpsta,
2640 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) ?
2641 " (non-ERP sta present)" : "");
2642 if (ic->ic_nonerpsta == 0 &&
2643 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) {
2644 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC,
2645 "%s: disable use of protection\n", __func__);
2646 disable_protection(ic);
2647 }
2648 }
2649 }
2650
2651 /*
2652 * Time out presence of an overlapping bss with non-ERP
2653 * stations. When operating in hostap mode we listen for
2654 * beacons from other stations and if we identify a non-ERP
2655 * station is present we enable protection. To identify
2656 * when all non-ERP stations are gone we time out this
2657 * condition.
2658 */
2659 static void
2660 ieee80211_erp_timeout(struct ieee80211com *ic)
2661 {
2662
2663 IEEE80211_LOCK_ASSERT(ic);
2664
2665 if ((ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) &&
2666 ieee80211_time_after(ticks, ic->ic_lastnonerp + IEEE80211_NONERP_PRESENT_AGE)) {
2667 #if 0
2668 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni,
2669 "%s", "age out non-ERP sta present on channel");
2670 #endif
2671 ic->ic_flags_ext &= ~IEEE80211_FEXT_NONERP_PR;
2672 if (ic->ic_nonerpsta == 0)
2673 disable_protection(ic);
2674 }
2675 }
2676
2677 /*
2678 * Handle bookkeeping for station deauthentication/disassociation
2679 * when operating as an ap.
2680 */
2681 void
2682 ieee80211_node_leave(struct ieee80211_node *ni)
2683 {
2684 struct ieee80211com *ic = ni->ni_ic;
2685 struct ieee80211vap *vap = ni->ni_vap;
2686 struct ieee80211_node_table *nt = ni->ni_table;
2687
2688 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni,
2689 "station with aid %d leaves", IEEE80211_NODE_AID(ni));
2690
2691 KASSERT(vap->iv_opmode != IEEE80211_M_STA,
2692 ("unexpected operating mode %u", vap->iv_opmode));
2693 /*
2694 * If node wasn't previously associated all
2695 * we need to do is reclaim the reference.
2696 */
2697 /* XXX ibss mode bypasses 11g and notification */
2698 if (ni->ni_associd == 0)
2699 goto done;
2700 /*
2701 * Tell the authenticator the station is leaving.
2702 * Note that we must do this before yanking the
2703 * association id as the authenticator uses the
2704 * associd to locate it's state block.
2705 */
2706 if (vap->iv_auth->ia_node_leave != NULL)
2707 vap->iv_auth->ia_node_leave(ni);
2708
2709 IEEE80211_LOCK(ic);
2710 IEEE80211_AID_CLR(vap, ni->ni_associd);
2711 vap->iv_sta_assoc--;
2712 ic->ic_sta_assoc--;
2713
2714 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan))
2715 ieee80211_ht_node_leave(ni);
2716 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) &&
2717 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan))
2718 ieee80211_node_leave_11g(ni);
2719 IEEE80211_UNLOCK(ic);
2720 /*
2721 * Cleanup station state. In particular clear various
2722 * state that might otherwise be reused if the node
2723 * is reused before the reference count goes to zero
2724 * (and memory is reclaimed).
2725 */
2726 ieee80211_sta_leave(ni);
2727 done:
2728 /*
2729 * Remove the node from any table it's recorded in and
2730 * drop the caller's reference. Removal from the table
2731 * is important to insure the node is not reprocessed
2732 * for inactivity.
2733 */
2734 if (nt != NULL) {
2735 IEEE80211_NODE_LOCK(nt);
2736 node_reclaim(nt, ni);
2737 IEEE80211_NODE_UNLOCK(nt);
2738 } else
2739 ieee80211_free_node(ni);
2740 }
2741
2742 struct rssiinfo {
2743 struct ieee80211vap *vap;
2744 int rssi_samples;
2745 uint32_t rssi_total;
2746 };
2747
2748 static void
2749 get_hostap_rssi(void *arg, struct ieee80211_node *ni)
2750 {
2751 struct rssiinfo *info = arg;
2752 struct ieee80211vap *vap = ni->ni_vap;
2753 int8_t rssi;
2754
2755 if (info->vap != vap)
2756 return;
2757 /* only associated stations */
2758 if (ni->ni_associd == 0)
2759 return;
2760 rssi = vap->iv_ic->ic_node_getrssi(ni);
2761 if (rssi != 0) {
2762 info->rssi_samples++;
2763 info->rssi_total += rssi;
2764 }
2765 }
2766
2767 static void
2768 get_adhoc_rssi(void *arg, struct ieee80211_node *ni)
2769 {
2770 struct rssiinfo *info = arg;
2771 struct ieee80211vap *vap = ni->ni_vap;
2772 int8_t rssi;
2773
2774 if (info->vap != vap)
2775 return;
2776 /* only neighbors */
2777 /* XXX check bssid */
2778 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0)
2779 return;
2780 rssi = vap->iv_ic->ic_node_getrssi(ni);
2781 if (rssi != 0) {
2782 info->rssi_samples++;
2783 info->rssi_total += rssi;
2784 }
2785 }
2786
2787 #ifdef IEEE80211_SUPPORT_MESH
2788 static void
2789 get_mesh_rssi(void *arg, struct ieee80211_node *ni)
2790 {
2791 struct rssiinfo *info = arg;
2792 struct ieee80211vap *vap = ni->ni_vap;
2793 int8_t rssi;
2794
2795 if (info->vap != vap)
2796 return;
2797 /* only neighbors that peered successfully */
2798 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED)
2799 return;
2800 rssi = vap->iv_ic->ic_node_getrssi(ni);
2801 if (rssi != 0) {
2802 info->rssi_samples++;
2803 info->rssi_total += rssi;
2804 }
2805 }
2806 #endif /* IEEE80211_SUPPORT_MESH */
2807
2808 int8_t
2809 ieee80211_getrssi(struct ieee80211vap *vap)
2810 {
2811 #define NZ(x) ((x) == 0 ? 1 : (x))
2812 struct ieee80211com *ic = vap->iv_ic;
2813 struct rssiinfo info;
2814
2815 info.rssi_total = 0;
2816 info.rssi_samples = 0;
2817 info.vap = vap;
2818 switch (vap->iv_opmode) {
2819 case IEEE80211_M_IBSS: /* average of all ibss neighbors */
2820 case IEEE80211_M_AHDEMO: /* average of all neighbors */
2821 ieee80211_iterate_nodes(&ic->ic_sta, get_adhoc_rssi, &info);
2822 break;
2823 case IEEE80211_M_HOSTAP: /* average of all associated stations */
2824 ieee80211_iterate_nodes(&ic->ic_sta, get_hostap_rssi, &info);
2825 break;
2826 #ifdef IEEE80211_SUPPORT_MESH
2827 case IEEE80211_M_MBSS: /* average of all mesh neighbors */
2828 ieee80211_iterate_nodes(&ic->ic_sta, get_mesh_rssi, &info);
2829 break;
2830 #endif
2831 case IEEE80211_M_MONITOR: /* XXX */
2832 case IEEE80211_M_STA: /* use stats from associated ap */
2833 default:
2834 if (vap->iv_bss != NULL)
2835 info.rssi_total = ic->ic_node_getrssi(vap->iv_bss);
2836 info.rssi_samples = 1;
2837 break;
2838 }
2839 return info.rssi_total / NZ(info.rssi_samples);
2840 #undef NZ
2841 }
2842
2843 void
2844 ieee80211_getsignal(struct ieee80211vap *vap, int8_t *rssi, int8_t *noise)
2845 {
2846
2847 if (vap->iv_bss == NULL) /* NB: shouldn't happen */
2848 return;
2849 vap->iv_ic->ic_node_getsignal(vap->iv_bss, rssi, noise);
2850 /* for non-station mode return avg'd rssi accounting */
2851 if (vap->iv_opmode != IEEE80211_M_STA)
2852 *rssi = ieee80211_getrssi(vap);
2853 }
Cache object: a8f0cc41d3e60c5c3d96fea6d4f6f556
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