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_media.h>
42 #include <net/ethernet.h>
43
44 #include <net80211/ieee80211_var.h>
45 #include <net80211/ieee80211_input.h>
46 #ifdef IEEE80211_SUPPORT_SUPERG
47 #include <net80211/ieee80211_superg.h>
48 #endif
49 #ifdef IEEE80211_SUPPORT_TDMA
50 #include <net80211/ieee80211_tdma.h>
51 #endif
52 #include <net80211/ieee80211_wds.h>
53 #include <net80211/ieee80211_mesh.h>
54 #include <net80211/ieee80211_ratectl.h>
55
56 #include <net/bpf.h>
57
58 /*
59 * IEEE80211_NODE_HASHSIZE must be a power of 2.
60 */
61 CTASSERT((IEEE80211_NODE_HASHSIZE & (IEEE80211_NODE_HASHSIZE-1)) == 0);
62
63 /*
64 * Association id's are managed with a bit vector.
65 */
66 #define IEEE80211_AID_SET(_vap, b) \
67 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] |= \
68 (1 << (IEEE80211_AID(b) % 32)))
69 #define IEEE80211_AID_CLR(_vap, b) \
70 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] &= \
71 ~(1 << (IEEE80211_AID(b) % 32)))
72 #define IEEE80211_AID_ISSET(_vap, b) \
73 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] & (1 << (IEEE80211_AID(b) % 32)))
74
75 #ifdef IEEE80211_DEBUG_REFCNT
76 #define REFCNT_LOC "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line
77 #else
78 #define REFCNT_LOC "%s %p<%s> refcnt %d\n", __func__
79 #endif
80
81 static int ieee80211_sta_join1(struct ieee80211_node *);
82
83 static struct ieee80211_node *node_alloc(struct ieee80211vap *,
84 const uint8_t [IEEE80211_ADDR_LEN]);
85 static void node_cleanup(struct ieee80211_node *);
86 static void node_free(struct ieee80211_node *);
87 static void node_age(struct ieee80211_node *);
88 static int8_t node_getrssi(const struct ieee80211_node *);
89 static void node_getsignal(const struct ieee80211_node *, int8_t *, int8_t *);
90 static void node_getmimoinfo(const struct ieee80211_node *,
91 struct ieee80211_mimo_info *);
92
93 static void _ieee80211_free_node(struct ieee80211_node *);
94
95 static void ieee80211_node_table_init(struct ieee80211com *ic,
96 struct ieee80211_node_table *nt, const char *name,
97 int inact, int keymaxix);
98 static void ieee80211_node_table_reset(struct ieee80211_node_table *,
99 struct ieee80211vap *);
100 static void ieee80211_node_table_cleanup(struct ieee80211_node_table *nt);
101 static void ieee80211_erp_timeout(struct ieee80211com *);
102
103 MALLOC_DEFINE(M_80211_NODE, "80211node", "802.11 node state");
104 MALLOC_DEFINE(M_80211_NODE_IE, "80211nodeie", "802.11 node ie");
105
106 void
107 ieee80211_node_attach(struct ieee80211com *ic)
108 {
109 /* XXX really want maxlen enforced per-sta */
110 ieee80211_ageq_init(&ic->ic_stageq, ic->ic_max_keyix * 8,
111 "802.11 staging q");
112 ieee80211_node_table_init(ic, &ic->ic_sta, "station",
113 IEEE80211_INACT_INIT, ic->ic_max_keyix);
114 callout_init(&ic->ic_inact, 1);
115 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz,
116 ieee80211_node_timeout, ic);
117
118 ic->ic_node_alloc = node_alloc;
119 ic->ic_node_free = node_free;
120 ic->ic_node_cleanup = node_cleanup;
121 ic->ic_node_age = node_age;
122 ic->ic_node_drain = node_age; /* NB: same as age */
123 ic->ic_node_getrssi = node_getrssi;
124 ic->ic_node_getsignal = node_getsignal;
125 ic->ic_node_getmimoinfo = node_getmimoinfo;
126
127 /*
128 * Set flags to be propagated to all vap's;
129 * these define default behaviour/configuration.
130 */
131 ic->ic_flags_ext |= IEEE80211_FEXT_INACT; /* inactivity processing */
132 }
133
134 void
135 ieee80211_node_detach(struct ieee80211com *ic)
136 {
137
138 callout_drain(&ic->ic_inact);
139 ieee80211_node_table_cleanup(&ic->ic_sta);
140 ieee80211_ageq_cleanup(&ic->ic_stageq);
141 }
142
143 void
144 ieee80211_node_vattach(struct ieee80211vap *vap)
145 {
146 /* NB: driver can override */
147 vap->iv_max_aid = IEEE80211_AID_DEF;
148
149 /* default station inactivity timer setings */
150 vap->iv_inact_init = IEEE80211_INACT_INIT;
151 vap->iv_inact_auth = IEEE80211_INACT_AUTH;
152 vap->iv_inact_run = IEEE80211_INACT_RUN;
153 vap->iv_inact_probe = IEEE80211_INACT_PROBE;
154
155 IEEE80211_DPRINTF(vap, IEEE80211_MSG_INACT,
156 "%s: init %u auth %u run %u probe %u\n", __func__,
157 vap->iv_inact_init, vap->iv_inact_auth,
158 vap->iv_inact_run, vap->iv_inact_probe);
159 }
160
161 void
162 ieee80211_node_latevattach(struct ieee80211vap *vap)
163 {
164 if (vap->iv_opmode == IEEE80211_M_HOSTAP) {
165 /* XXX should we allow max aid to be zero? */
166 if (vap->iv_max_aid < IEEE80211_AID_MIN) {
167 vap->iv_max_aid = IEEE80211_AID_MIN;
168 if_printf(vap->iv_ifp,
169 "WARNING: max aid too small, changed to %d\n",
170 vap->iv_max_aid);
171 }
172 vap->iv_aid_bitmap = (uint32_t *) malloc(
173 howmany(vap->iv_max_aid, 32) * sizeof(uint32_t),
174 M_80211_NODE, M_NOWAIT | M_ZERO);
175 if (vap->iv_aid_bitmap == NULL) {
176 /* XXX no way to recover */
177 printf("%s: no memory for AID bitmap, max aid %d!\n",
178 __func__, vap->iv_max_aid);
179 vap->iv_max_aid = 0;
180 }
181 }
182
183 ieee80211_reset_bss(vap);
184
185 vap->iv_auth = ieee80211_authenticator_get(vap->iv_bss->ni_authmode);
186 }
187
188 void
189 ieee80211_node_vdetach(struct ieee80211vap *vap)
190 {
191 struct ieee80211com *ic = vap->iv_ic;
192
193 ieee80211_node_table_reset(&ic->ic_sta, vap);
194 if (vap->iv_bss != NULL) {
195 ieee80211_free_node(vap->iv_bss);
196 vap->iv_bss = NULL;
197 }
198 if (vap->iv_aid_bitmap != NULL) {
199 free(vap->iv_aid_bitmap, M_80211_NODE);
200 vap->iv_aid_bitmap = NULL;
201 }
202 }
203
204 /*
205 * Port authorize/unauthorize interfaces for use by an authenticator.
206 */
207
208 void
209 ieee80211_node_authorize(struct ieee80211_node *ni)
210 {
211 struct ieee80211vap *vap = ni->ni_vap;
212
213 ni->ni_flags |= IEEE80211_NODE_AUTH;
214 ni->ni_inact_reload = vap->iv_inact_run;
215 ni->ni_inact = ni->ni_inact_reload;
216
217 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni,
218 "%s: inact_reload %u", __func__, ni->ni_inact_reload);
219 }
220
221 void
222 ieee80211_node_unauthorize(struct ieee80211_node *ni)
223 {
224 struct ieee80211vap *vap = ni->ni_vap;
225
226 ni->ni_flags &= ~IEEE80211_NODE_AUTH;
227 ni->ni_inact_reload = vap->iv_inact_auth;
228 if (ni->ni_inact > ni->ni_inact_reload)
229 ni->ni_inact = ni->ni_inact_reload;
230
231 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni,
232 "%s: inact_reload %u inact %u", __func__,
233 ni->ni_inact_reload, ni->ni_inact);
234 }
235
236 /*
237 * Fix tx parameters for a node according to ``association state''.
238 */
239 void
240 ieee80211_node_setuptxparms(struct ieee80211_node *ni)
241 {
242 struct ieee80211vap *vap = ni->ni_vap;
243 enum ieee80211_phymode mode;
244
245 if (ni->ni_flags & IEEE80211_NODE_HT) {
246 if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan))
247 mode = IEEE80211_MODE_11NA;
248 else
249 mode = IEEE80211_MODE_11NG;
250 } else { /* legacy rate handling */
251 if (IEEE80211_IS_CHAN_ST(ni->ni_chan))
252 mode = IEEE80211_MODE_STURBO_A;
253 else if (IEEE80211_IS_CHAN_HALF(ni->ni_chan))
254 mode = IEEE80211_MODE_HALF;
255 else if (IEEE80211_IS_CHAN_QUARTER(ni->ni_chan))
256 mode = IEEE80211_MODE_QUARTER;
257 /* NB: 108A should be handled as 11a */
258 else if (IEEE80211_IS_CHAN_A(ni->ni_chan))
259 mode = IEEE80211_MODE_11A;
260 else if (IEEE80211_IS_CHAN_108G(ni->ni_chan) ||
261 (ni->ni_flags & IEEE80211_NODE_ERP))
262 mode = IEEE80211_MODE_11G;
263 else
264 mode = IEEE80211_MODE_11B;
265 }
266 ni->ni_txparms = &vap->iv_txparms[mode];
267 }
268
269 /*
270 * Set/change the channel. The rate set is also updated as
271 * to insure a consistent view by drivers.
272 * XXX should be private but hostap needs it to deal with CSA
273 */
274 void
275 ieee80211_node_set_chan(struct ieee80211_node *ni,
276 struct ieee80211_channel *chan)
277 {
278 struct ieee80211com *ic = ni->ni_ic;
279 struct ieee80211vap *vap = ni->ni_vap;
280 enum ieee80211_phymode mode;
281
282 KASSERT(chan != IEEE80211_CHAN_ANYC, ("no channel"));
283
284 ni->ni_chan = chan;
285 mode = ieee80211_chan2mode(chan);
286 if (IEEE80211_IS_CHAN_HT(chan)) {
287 /*
288 * We must install the legacy rate est in ni_rates and the
289 * HT rate set in ni_htrates.
290 */
291 ni->ni_htrates = *ieee80211_get_suphtrates(ic, chan);
292 /*
293 * Setup bss tx parameters based on operating mode. We
294 * use legacy rates when operating in a mixed HT+non-HT bss
295 * and non-ERP rates in 11g for mixed ERP+non-ERP bss.
296 */
297 if (mode == IEEE80211_MODE_11NA &&
298 (vap->iv_flags_ht & IEEE80211_FHT_PUREN) == 0)
299 mode = IEEE80211_MODE_11A;
300 else if (mode == IEEE80211_MODE_11NG &&
301 (vap->iv_flags_ht & IEEE80211_FHT_PUREN) == 0)
302 mode = IEEE80211_MODE_11G;
303 if (mode == IEEE80211_MODE_11G &&
304 (vap->iv_flags & IEEE80211_F_PUREG) == 0)
305 mode = IEEE80211_MODE_11B;
306 }
307 ni->ni_txparms = &vap->iv_txparms[mode];
308 ni->ni_rates = *ieee80211_get_suprates(ic, chan);
309 }
310
311 static __inline void
312 copy_bss(struct ieee80211_node *nbss, const struct ieee80211_node *obss)
313 {
314 /* propagate useful state */
315 nbss->ni_authmode = obss->ni_authmode;
316 nbss->ni_txpower = obss->ni_txpower;
317 nbss->ni_vlan = obss->ni_vlan;
318 /* XXX statistics? */
319 /* XXX legacy WDS bssid? */
320 }
321
322 void
323 ieee80211_create_ibss(struct ieee80211vap* vap, struct ieee80211_channel *chan)
324 {
325 struct ieee80211com *ic = vap->iv_ic;
326 struct ieee80211_node *ni;
327
328 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN,
329 "%s: creating %s on channel %u\n", __func__,
330 ieee80211_opmode_name[vap->iv_opmode],
331 ieee80211_chan2ieee(ic, 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 * Handle 802.11 ad hoc network merge. The
557 * convention, set by the Wireless Ethernet Compatibility Alliance
558 * (WECA), is that an 802.11 station will change its BSSID to match
559 * the "oldest" 802.11 ad hoc network, on the same channel, that
560 * has the station's desired SSID. The "oldest" 802.11 network
561 * sends beacons with the greatest TSF timestamp.
562 *
563 * The caller is assumed to validate TSF's before attempting a merge.
564 *
565 * Return !0 if the BSSID changed, 0 otherwise.
566 */
567 int
568 ieee80211_ibss_merge(struct ieee80211_node *ni)
569 {
570 struct ieee80211vap *vap = ni->ni_vap;
571 #ifdef IEEE80211_DEBUG
572 struct ieee80211com *ic = ni->ni_ic;
573 #endif
574
575 if (ni == vap->iv_bss ||
576 IEEE80211_ADDR_EQ(ni->ni_bssid, vap->iv_bss->ni_bssid)) {
577 /* unchanged, nothing to do */
578 return 0;
579 }
580 if (!check_bss(vap, ni)) {
581 /* capabilities mismatch */
582 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC,
583 "%s: merge failed, capabilities mismatch\n", __func__);
584 #ifdef IEEE80211_DEBUG
585 if (ieee80211_msg_assoc(vap))
586 check_bss_debug(vap, ni);
587 #endif
588 vap->iv_stats.is_ibss_capmismatch++;
589 return 0;
590 }
591 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC,
592 "%s: new bssid %s: %s preamble, %s slot time%s\n", __func__,
593 ether_sprintf(ni->ni_bssid),
594 ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long",
595 ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long",
596 ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : ""
597 );
598 return ieee80211_sta_join1(ieee80211_ref_node(ni));
599 }
600
601 /*
602 * Calculate HT channel promotion flags for all vaps.
603 * This assumes ni_chan have been setup for each vap.
604 */
605 static int
606 gethtadjustflags(struct ieee80211com *ic)
607 {
608 struct ieee80211vap *vap;
609 int flags;
610
611 flags = 0;
612 /* XXX locking */
613 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
614 if (vap->iv_state < IEEE80211_S_RUN)
615 continue;
616 switch (vap->iv_opmode) {
617 case IEEE80211_M_WDS:
618 case IEEE80211_M_STA:
619 case IEEE80211_M_AHDEMO:
620 case IEEE80211_M_HOSTAP:
621 case IEEE80211_M_IBSS:
622 case IEEE80211_M_MBSS:
623 flags |= ieee80211_htchanflags(vap->iv_bss->ni_chan);
624 break;
625 default:
626 break;
627 }
628 }
629 return flags;
630 }
631
632 /*
633 * Check if the current channel needs to change based on whether
634 * any vap's are using HT20/HT40. This is used to sync the state
635 * of ic_curchan after a channel width change on a running vap.
636 */
637 void
638 ieee80211_sync_curchan(struct ieee80211com *ic)
639 {
640 struct ieee80211_channel *c;
641
642 c = ieee80211_ht_adjust_channel(ic, ic->ic_curchan, gethtadjustflags(ic));
643 if (c != ic->ic_curchan) {
644 ic->ic_curchan = c;
645 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan);
646 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan);
647 IEEE80211_UNLOCK(ic);
648 ic->ic_set_channel(ic);
649 ieee80211_radiotap_chan_change(ic);
650 IEEE80211_LOCK(ic);
651 }
652 }
653
654 /*
655 * Setup the current channel. The request channel may be
656 * promoted if other vap's are operating with HT20/HT40.
657 */
658 void
659 ieee80211_setupcurchan(struct ieee80211com *ic, struct ieee80211_channel *c)
660 {
661 if (ic->ic_htcaps & IEEE80211_HTC_HT) {
662 int flags = gethtadjustflags(ic);
663 /*
664 * Check for channel promotion required to support the
665 * set of running vap's. This assumes we are called
666 * after ni_chan is setup for each vap.
667 */
668 /* NB: this assumes IEEE80211_FHT_USEHT40 > IEEE80211_FHT_HT */
669 if (flags > ieee80211_htchanflags(c))
670 c = ieee80211_ht_adjust_channel(ic, c, flags);
671 }
672 ic->ic_bsschan = ic->ic_curchan = c;
673 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan);
674 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan);
675 }
676
677 /*
678 * Change the current channel. The channel change is guaranteed to have
679 * happened before the next state change.
680 */
681 void
682 ieee80211_setcurchan(struct ieee80211com *ic, struct ieee80211_channel *c)
683 {
684 ieee80211_setupcurchan(ic, c);
685 ieee80211_runtask(ic, &ic->ic_chan_task);
686 }
687
688 void
689 ieee80211_update_chw(struct ieee80211com *ic)
690 {
691
692 ieee80211_setupcurchan(ic, ic->ic_curchan);
693 ieee80211_runtask(ic, &ic->ic_chw_task);
694 }
695
696 /*
697 * Join the specified IBSS/BSS network. The node is assumed to
698 * be passed in with a held reference.
699 */
700 static int
701 ieee80211_sta_join1(struct ieee80211_node *selbs)
702 {
703 struct ieee80211vap *vap = selbs->ni_vap;
704 struct ieee80211com *ic = selbs->ni_ic;
705 struct ieee80211_node *obss;
706 int canreassoc;
707
708 /*
709 * Committed to selbs, setup state.
710 */
711 obss = vap->iv_bss;
712 /*
713 * Check if old+new node have the same address in which
714 * case we can reassociate when operating in sta mode.
715 */
716 canreassoc = (obss != NULL &&
717 vap->iv_state == IEEE80211_S_RUN &&
718 IEEE80211_ADDR_EQ(obss->ni_macaddr, selbs->ni_macaddr));
719 vap->iv_bss = selbs; /* NB: caller assumed to bump refcnt */
720 if (obss != NULL) {
721 copy_bss(selbs, obss);
722 ieee80211_node_decref(obss); /* iv_bss reference */
723 ieee80211_free_node(obss); /* station table reference */
724 obss = NULL; /* NB: guard against later use */
725 }
726
727 /*
728 * Delete unusable rates; we've already checked
729 * that the negotiated rate set is acceptable.
730 */
731 ieee80211_fix_rate(vap->iv_bss, &vap->iv_bss->ni_rates,
732 IEEE80211_F_DODEL | IEEE80211_F_JOIN);
733
734 ieee80211_setcurchan(ic, selbs->ni_chan);
735 /*
736 * Set the erp state (mostly the slot time) to deal with
737 * the auto-select case; this should be redundant if the
738 * mode is locked.
739 */
740 ieee80211_reset_erp(ic);
741 ieee80211_wme_initparams(vap);
742
743 if (vap->iv_opmode == IEEE80211_M_STA) {
744 if (canreassoc) {
745 /* Reassociate */
746 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 1);
747 } else {
748 /*
749 * Act as if we received a DEAUTH frame in case we
750 * are invoked from the RUN state. This will cause
751 * us to try to re-authenticate if we are operating
752 * as a station.
753 */
754 ieee80211_new_state(vap, IEEE80211_S_AUTH,
755 IEEE80211_FC0_SUBTYPE_DEAUTH);
756 }
757 } else
758 ieee80211_new_state(vap, IEEE80211_S_RUN, -1);
759 return 1;
760 }
761
762 int
763 ieee80211_sta_join(struct ieee80211vap *vap, struct ieee80211_channel *chan,
764 const struct ieee80211_scan_entry *se)
765 {
766 struct ieee80211com *ic = vap->iv_ic;
767 struct ieee80211_node *ni;
768
769 ni = ieee80211_alloc_node(&ic->ic_sta, vap, se->se_macaddr);
770 if (ni == NULL) {
771 /* XXX msg */
772 return 0;
773 }
774
775 /*
776 * Expand scan state into node's format.
777 * XXX may not need all this stuff
778 */
779 IEEE80211_ADDR_COPY(ni->ni_bssid, se->se_bssid);
780 ni->ni_esslen = se->se_ssid[1];
781 memcpy(ni->ni_essid, se->se_ssid+2, ni->ni_esslen);
782 ni->ni_tstamp.tsf = se->se_tstamp.tsf;
783 ni->ni_intval = se->se_intval;
784 ni->ni_capinfo = se->se_capinfo;
785 ni->ni_chan = chan;
786 ni->ni_timoff = se->se_timoff;
787 ni->ni_fhdwell = se->se_fhdwell;
788 ni->ni_fhindex = se->se_fhindex;
789 ni->ni_erp = se->se_erp;
790 IEEE80211_RSSI_LPF(ni->ni_avgrssi, se->se_rssi);
791 ni->ni_noise = se->se_noise;
792 if (vap->iv_opmode == IEEE80211_M_STA) {
793 /* NB: only infrastructure mode requires an associd */
794 ni->ni_flags |= IEEE80211_NODE_ASSOCID;
795 }
796
797 if (ieee80211_ies_init(&ni->ni_ies, se->se_ies.data, se->se_ies.len)) {
798 ieee80211_ies_expand(&ni->ni_ies);
799 #ifdef IEEE80211_SUPPORT_SUPERG
800 if (ni->ni_ies.ath_ie != NULL)
801 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie);
802 #endif
803 if (ni->ni_ies.htcap_ie != NULL)
804 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie);
805 if (ni->ni_ies.htinfo_ie != NULL)
806 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie);
807 #ifdef IEEE80211_SUPPORT_MESH
808 if (ni->ni_ies.meshid_ie != NULL)
809 ieee80211_parse_meshid(ni, ni->ni_ies.meshid_ie);
810 #endif
811 #ifdef IEEE80211_SUPPORT_TDMA
812 if (ni->ni_ies.tdma_ie != NULL)
813 ieee80211_parse_tdma(ni, ni->ni_ies.tdma_ie);
814 #endif
815 }
816
817 vap->iv_dtim_period = se->se_dtimperiod;
818 vap->iv_dtim_count = 0;
819
820 /* NB: must be after ni_chan is setup */
821 ieee80211_setup_rates(ni, se->se_rates, se->se_xrates,
822 IEEE80211_F_DOSORT);
823 if (ieee80211_iserp_rateset(&ni->ni_rates))
824 ni->ni_flags |= IEEE80211_NODE_ERP;
825
826 /*
827 * Setup HT state for this node if it's available, otherwise
828 * non-STA modes won't pick this state up.
829 *
830 * For IBSS and related modes that don't go through an
831 * association request/response, the only appropriate place
832 * to setup the HT state is here.
833 */
834 if (ni->ni_ies.htinfo_ie != NULL &&
835 ni->ni_ies.htcap_ie != NULL &&
836 vap->iv_flags_ht & IEEE80211_FHT_HT) {
837 ieee80211_ht_node_init(ni);
838 ieee80211_ht_updateparams(ni,
839 ni->ni_ies.htcap_ie,
840 ni->ni_ies.htinfo_ie);
841 ieee80211_setup_htrates(ni, ni->ni_ies.htcap_ie,
842 IEEE80211_F_JOIN | IEEE80211_F_DOBRS);
843 ieee80211_setup_basic_htrates(ni, ni->ni_ies.htinfo_ie);
844 }
845 /* XXX else check for ath FF? */
846 /* XXX QoS? Difficult given that WME config is specific to a master */
847
848 ieee80211_node_setuptxparms(ni);
849 ieee80211_ratectl_node_init(ni);
850
851 return ieee80211_sta_join1(ieee80211_ref_node(ni));
852 }
853
854 /*
855 * Leave the specified IBSS/BSS network. The node is assumed to
856 * be passed in with a held reference.
857 */
858 void
859 ieee80211_sta_leave(struct ieee80211_node *ni)
860 {
861 struct ieee80211com *ic = ni->ni_ic;
862
863 ic->ic_node_cleanup(ni);
864 ieee80211_notify_node_leave(ni);
865 }
866
867 /*
868 * Send a deauthenticate frame and drop the station.
869 */
870 void
871 ieee80211_node_deauth(struct ieee80211_node *ni, int reason)
872 {
873 /* NB: bump the refcnt to be sure temporay nodes are not reclaimed */
874 ieee80211_ref_node(ni);
875 if (ni->ni_associd != 0)
876 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH, reason);
877 ieee80211_node_leave(ni);
878 ieee80211_free_node(ni);
879 }
880
881 static struct ieee80211_node *
882 node_alloc(struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN])
883 {
884 struct ieee80211_node *ni;
885
886 ni = (struct ieee80211_node *) malloc(sizeof(struct ieee80211_node),
887 M_80211_NODE, M_NOWAIT | M_ZERO);
888 return ni;
889 }
890
891 /*
892 * Initialize an ie blob with the specified data. If previous
893 * data exists re-use the data block. As a side effect we clear
894 * all references to specific ie's; the caller is required to
895 * recalculate them.
896 */
897 int
898 ieee80211_ies_init(struct ieee80211_ies *ies, const uint8_t *data, int len)
899 {
900 /* NB: assumes data+len are the last fields */
901 memset(ies, 0, offsetof(struct ieee80211_ies, data));
902 if (ies->data != NULL && ies->len != len) {
903 /* data size changed */
904 free(ies->data, M_80211_NODE_IE);
905 ies->data = NULL;
906 }
907 if (ies->data == NULL) {
908 ies->data = (uint8_t *) malloc(len, M_80211_NODE_IE, M_NOWAIT);
909 if (ies->data == NULL) {
910 ies->len = 0;
911 /* NB: pointers have already been zero'd above */
912 return 0;
913 }
914 }
915 memcpy(ies->data, data, len);
916 ies->len = len;
917 return 1;
918 }
919
920 /*
921 * Reclaim storage for an ie blob.
922 */
923 void
924 ieee80211_ies_cleanup(struct ieee80211_ies *ies)
925 {
926 if (ies->data != NULL)
927 free(ies->data, M_80211_NODE_IE);
928 }
929
930 /*
931 * Expand an ie blob data contents and to fillin individual
932 * ie pointers. The data blob is assumed to be well-formed;
933 * we don't do any validity checking of ie lengths.
934 */
935 void
936 ieee80211_ies_expand(struct ieee80211_ies *ies)
937 {
938 uint8_t *ie;
939 int ielen;
940
941 ie = ies->data;
942 ielen = ies->len;
943 while (ielen > 0) {
944 switch (ie[0]) {
945 case IEEE80211_ELEMID_VENDOR:
946 if (iswpaoui(ie))
947 ies->wpa_ie = ie;
948 else if (iswmeoui(ie))
949 ies->wme_ie = ie;
950 #ifdef IEEE80211_SUPPORT_SUPERG
951 else if (isatherosoui(ie))
952 ies->ath_ie = ie;
953 #endif
954 #ifdef IEEE80211_SUPPORT_TDMA
955 else if (istdmaoui(ie))
956 ies->tdma_ie = ie;
957 #endif
958 break;
959 case IEEE80211_ELEMID_RSN:
960 ies->rsn_ie = ie;
961 break;
962 case IEEE80211_ELEMID_HTCAP:
963 ies->htcap_ie = ie;
964 break;
965 case IEEE80211_ELEMID_HTINFO:
966 ies->htinfo_ie = ie;
967 break;
968 #ifdef IEEE80211_SUPPORT_MESH
969 case IEEE80211_ELEMID_MESHID:
970 ies->meshid_ie = ie;
971 break;
972 #endif
973 }
974 ielen -= 2 + ie[1];
975 ie += 2 + ie[1];
976 }
977 }
978
979 /*
980 * Reclaim any resources in a node and reset any critical
981 * state. Typically nodes are free'd immediately after,
982 * but in some cases the storage may be reused so we need
983 * to insure consistent state (should probably fix that).
984 */
985 static void
986 node_cleanup(struct ieee80211_node *ni)
987 {
988 struct ieee80211vap *vap = ni->ni_vap;
989 struct ieee80211com *ic = ni->ni_ic;
990 int i;
991
992 /* NB: preserve ni_table */
993 if (ni->ni_flags & IEEE80211_NODE_PWR_MGT) {
994 if (vap->iv_opmode != IEEE80211_M_STA)
995 vap->iv_ps_sta--;
996 ni->ni_flags &= ~IEEE80211_NODE_PWR_MGT;
997 IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni,
998 "power save mode off, %u sta's in ps mode", vap->iv_ps_sta);
999 }
1000 /*
1001 * Cleanup any HT-related state.
1002 */
1003 if (ni->ni_flags & IEEE80211_NODE_HT)
1004 ieee80211_ht_node_cleanup(ni);
1005 #ifdef IEEE80211_SUPPORT_SUPERG
1006 else if (ni->ni_ath_flags & IEEE80211_NODE_ATH)
1007 ieee80211_ff_node_cleanup(ni);
1008 #endif
1009 #ifdef IEEE80211_SUPPORT_MESH
1010 /*
1011 * Cleanup any mesh-related state.
1012 */
1013 if (vap->iv_opmode == IEEE80211_M_MBSS)
1014 ieee80211_mesh_node_cleanup(ni);
1015 #endif
1016 /*
1017 * Clear any staging queue entries.
1018 */
1019 ieee80211_ageq_drain_node(&ic->ic_stageq, ni);
1020
1021 /*
1022 * Clear AREF flag that marks the authorization refcnt bump
1023 * has happened. This is probably not needed as the node
1024 * should always be removed from the table so not found but
1025 * do it just in case.
1026 * Likewise clear the ASSOCID flag as these flags are intended
1027 * to be managed in tandem.
1028 */
1029 ni->ni_flags &= ~(IEEE80211_NODE_AREF | IEEE80211_NODE_ASSOCID);
1030
1031 /*
1032 * Drain power save queue and, if needed, clear TIM.
1033 */
1034 if (ieee80211_node_psq_drain(ni) != 0 && vap->iv_set_tim != NULL)
1035 vap->iv_set_tim(ni, 0);
1036
1037 ni->ni_associd = 0;
1038 if (ni->ni_challenge != NULL) {
1039 free(ni->ni_challenge, M_80211_NODE);
1040 ni->ni_challenge = NULL;
1041 }
1042 /*
1043 * Preserve SSID, WPA, and WME ie's so the bss node is
1044 * reusable during a re-auth/re-assoc state transition.
1045 * If we remove these data they will not be recreated
1046 * because they come from a probe-response or beacon frame
1047 * which cannot be expected prior to the association-response.
1048 * This should not be an issue when operating in other modes
1049 * as stations leaving always go through a full state transition
1050 * which will rebuild this state.
1051 *
1052 * XXX does this leave us open to inheriting old state?
1053 */
1054 for (i = 0; i < nitems(ni->ni_rxfrag); i++)
1055 if (ni->ni_rxfrag[i] != NULL) {
1056 m_freem(ni->ni_rxfrag[i]);
1057 ni->ni_rxfrag[i] = NULL;
1058 }
1059 /*
1060 * Must be careful here to remove any key map entry w/o a LOR.
1061 */
1062 ieee80211_node_delucastkey(ni);
1063 }
1064
1065 static void
1066 node_free(struct ieee80211_node *ni)
1067 {
1068 struct ieee80211com *ic = ni->ni_ic;
1069
1070 ieee80211_ratectl_node_deinit(ni);
1071 ic->ic_node_cleanup(ni);
1072 ieee80211_ies_cleanup(&ni->ni_ies);
1073 ieee80211_psq_cleanup(&ni->ni_psq);
1074 free(ni, M_80211_NODE);
1075 }
1076
1077 static void
1078 node_age(struct ieee80211_node *ni)
1079 {
1080 struct ieee80211vap *vap = ni->ni_vap;
1081
1082 IEEE80211_NODE_LOCK_ASSERT(&vap->iv_ic->ic_sta);
1083
1084 /*
1085 * Age frames on the power save queue.
1086 */
1087 if (ieee80211_node_psq_age(ni) != 0 &&
1088 ni->ni_psq.psq_len == 0 && vap->iv_set_tim != NULL)
1089 vap->iv_set_tim(ni, 0);
1090 /*
1091 * Age out HT resources (e.g. frames on the
1092 * A-MPDU reorder queues).
1093 */
1094 if (ni->ni_associd != 0 && (ni->ni_flags & IEEE80211_NODE_HT))
1095 ieee80211_ht_node_age(ni);
1096 }
1097
1098 static int8_t
1099 node_getrssi(const struct ieee80211_node *ni)
1100 {
1101 uint32_t avgrssi = ni->ni_avgrssi;
1102 int32_t rssi;
1103
1104 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER)
1105 return 0;
1106 rssi = IEEE80211_RSSI_GET(avgrssi);
1107 return rssi < 0 ? 0 : rssi > 127 ? 127 : rssi;
1108 }
1109
1110 static void
1111 node_getsignal(const struct ieee80211_node *ni, int8_t *rssi, int8_t *noise)
1112 {
1113 *rssi = node_getrssi(ni);
1114 *noise = ni->ni_noise;
1115 }
1116
1117 static void
1118 node_getmimoinfo(const struct ieee80211_node *ni,
1119 struct ieee80211_mimo_info *info)
1120 {
1121 int i;
1122 uint32_t avgrssi;
1123 int32_t rssi;
1124
1125 bzero(info, sizeof(*info));
1126
1127 for (i = 0; i < ni->ni_mimo_chains; i++) {
1128 avgrssi = ni->ni_mimo_rssi_ctl[i];
1129 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) {
1130 info->rssi[i] = 0;
1131 } else {
1132 rssi = IEEE80211_RSSI_GET(avgrssi);
1133 info->rssi[i] = rssi < 0 ? 0 : rssi > 127 ? 127 : rssi;
1134 }
1135 info->noise[i] = ni->ni_mimo_noise_ctl[i];
1136 }
1137
1138 /* XXX ext radios? */
1139
1140 /* XXX EVM? */
1141 }
1142
1143 struct ieee80211_node *
1144 ieee80211_alloc_node(struct ieee80211_node_table *nt,
1145 struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN])
1146 {
1147 struct ieee80211com *ic = nt->nt_ic;
1148 struct ieee80211_node *ni;
1149 int hash;
1150
1151 ni = ic->ic_node_alloc(vap, macaddr);
1152 if (ni == NULL) {
1153 vap->iv_stats.is_rx_nodealloc++;
1154 return NULL;
1155 }
1156
1157 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1158 "%s %p<%s> in %s table\n", __func__, ni,
1159 ether_sprintf(macaddr), nt->nt_name);
1160
1161 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr);
1162 hash = IEEE80211_NODE_HASH(ic, macaddr);
1163 ieee80211_node_initref(ni); /* mark referenced */
1164 ni->ni_chan = IEEE80211_CHAN_ANYC;
1165 ni->ni_authmode = IEEE80211_AUTH_OPEN;
1166 ni->ni_txpower = ic->ic_txpowlimit; /* max power */
1167 ni->ni_txparms = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)];
1168 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE);
1169 ni->ni_avgrssi = IEEE80211_RSSI_DUMMY_MARKER;
1170 ni->ni_inact_reload = nt->nt_inact_init;
1171 ni->ni_inact = ni->ni_inact_reload;
1172 ni->ni_ath_defkeyix = 0x7fff;
1173 ieee80211_psq_init(&ni->ni_psq, "unknown");
1174 #ifdef IEEE80211_SUPPORT_MESH
1175 if (vap->iv_opmode == IEEE80211_M_MBSS)
1176 ieee80211_mesh_node_init(vap, ni);
1177 #endif
1178 IEEE80211_NODE_LOCK(nt);
1179 TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list);
1180 LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash);
1181 ni->ni_table = nt;
1182 ni->ni_vap = vap;
1183 ni->ni_ic = ic;
1184 IEEE80211_NODE_UNLOCK(nt);
1185
1186 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni,
1187 "%s: inact_reload %u", __func__, ni->ni_inact_reload);
1188
1189 return ni;
1190 }
1191
1192 /*
1193 * Craft a temporary node suitable for sending a management frame
1194 * to the specified station. We craft only as much state as we
1195 * need to do the work since the node will be immediately reclaimed
1196 * once the send completes.
1197 */
1198 struct ieee80211_node *
1199 ieee80211_tmp_node(struct ieee80211vap *vap,
1200 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1201 {
1202 struct ieee80211com *ic = vap->iv_ic;
1203 struct ieee80211_node *ni;
1204
1205 ni = ic->ic_node_alloc(vap, macaddr);
1206 if (ni != NULL) {
1207 struct ieee80211_node *bss = vap->iv_bss;
1208
1209 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1210 "%s %p<%s>\n", __func__, ni, ether_sprintf(macaddr));
1211
1212 ni->ni_table = NULL; /* NB: pedantic */
1213 ni->ni_ic = ic; /* NB: needed to set channel */
1214 ni->ni_vap = vap;
1215
1216 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr);
1217 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid);
1218 ieee80211_node_initref(ni); /* mark referenced */
1219 /* NB: required by ieee80211_fix_rate */
1220 ieee80211_node_set_chan(ni, bss->ni_chan);
1221 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey,
1222 IEEE80211_KEYIX_NONE);
1223 ni->ni_txpower = bss->ni_txpower;
1224 /* XXX optimize away */
1225 ieee80211_psq_init(&ni->ni_psq, "unknown");
1226
1227 ieee80211_ratectl_node_init(ni);
1228 } else {
1229 /* XXX msg */
1230 vap->iv_stats.is_rx_nodealloc++;
1231 }
1232 return ni;
1233 }
1234
1235 struct ieee80211_node *
1236 ieee80211_dup_bss(struct ieee80211vap *vap,
1237 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1238 {
1239 struct ieee80211com *ic = vap->iv_ic;
1240 struct ieee80211_node *ni;
1241
1242 ni = ieee80211_alloc_node(&ic->ic_sta, vap, macaddr);
1243 if (ni != NULL) {
1244 struct ieee80211_node *bss = vap->iv_bss;
1245 /*
1246 * Inherit from iv_bss.
1247 */
1248 copy_bss(ni, bss);
1249 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid);
1250 ieee80211_node_set_chan(ni, bss->ni_chan);
1251 }
1252 return ni;
1253 }
1254
1255 /*
1256 * Create a bss node for a legacy WDS vap. The far end does
1257 * not associate so we just create create a new node and
1258 * simulate an association. The caller is responsible for
1259 * installing the node as the bss node and handling any further
1260 * setup work like authorizing the port.
1261 */
1262 struct ieee80211_node *
1263 ieee80211_node_create_wds(struct ieee80211vap *vap,
1264 const uint8_t bssid[IEEE80211_ADDR_LEN], struct ieee80211_channel *chan)
1265 {
1266 struct ieee80211com *ic = vap->iv_ic;
1267 struct ieee80211_node *ni;
1268
1269 /* XXX check if node already in sta table? */
1270 ni = ieee80211_alloc_node(&ic->ic_sta, vap, bssid);
1271 if (ni != NULL) {
1272 ni->ni_wdsvap = vap;
1273 IEEE80211_ADDR_COPY(ni->ni_bssid, bssid);
1274 /*
1275 * Inherit any manually configured settings.
1276 */
1277 copy_bss(ni, vap->iv_bss);
1278 ieee80211_node_set_chan(ni, chan);
1279 /* NB: propagate ssid so available to WPA supplicant */
1280 ni->ni_esslen = vap->iv_des_ssid[0].len;
1281 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen);
1282 /* NB: no associd for peer */
1283 /*
1284 * There are no management frames to use to
1285 * discover neighbor capabilities, so blindly
1286 * propagate the local configuration.
1287 */
1288 if (vap->iv_flags & IEEE80211_F_WME)
1289 ni->ni_flags |= IEEE80211_NODE_QOS;
1290 #ifdef IEEE80211_SUPPORT_SUPERG
1291 if (vap->iv_flags & IEEE80211_F_FF)
1292 ni->ni_flags |= IEEE80211_NODE_FF;
1293 #endif
1294 if ((ic->ic_htcaps & IEEE80211_HTC_HT) &&
1295 (vap->iv_flags_ht & IEEE80211_FHT_HT)) {
1296 /*
1297 * Device is HT-capable and HT is enabled for
1298 * the vap; setup HT operation. On return
1299 * ni_chan will be adjusted to an HT channel.
1300 */
1301 ieee80211_ht_wds_init(ni);
1302 } else {
1303 struct ieee80211_channel *c = ni->ni_chan;
1304 /*
1305 * Force a legacy channel to be used.
1306 */
1307 c = ieee80211_find_channel(ic,
1308 c->ic_freq, c->ic_flags &~ IEEE80211_CHAN_HT);
1309 KASSERT(c != NULL, ("no legacy channel, %u/%x",
1310 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags));
1311 ni->ni_chan = c;
1312 }
1313 }
1314 return ni;
1315 }
1316
1317 struct ieee80211_node *
1318 #ifdef IEEE80211_DEBUG_REFCNT
1319 ieee80211_find_node_locked_debug(struct ieee80211_node_table *nt,
1320 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line)
1321 #else
1322 ieee80211_find_node_locked(struct ieee80211_node_table *nt,
1323 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1324 #endif
1325 {
1326 struct ieee80211_node *ni;
1327 int hash;
1328
1329 IEEE80211_NODE_LOCK_ASSERT(nt);
1330
1331 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr);
1332 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) {
1333 if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) {
1334 ieee80211_ref_node(ni); /* mark referenced */
1335 #ifdef IEEE80211_DEBUG_REFCNT
1336 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1337 "%s (%s:%u) %p<%s> refcnt %d\n", __func__,
1338 func, line,
1339 ni, ether_sprintf(ni->ni_macaddr),
1340 ieee80211_node_refcnt(ni));
1341 #endif
1342 return ni;
1343 }
1344 }
1345 return NULL;
1346 }
1347
1348 struct ieee80211_node *
1349 #ifdef IEEE80211_DEBUG_REFCNT
1350 ieee80211_find_node_debug(struct ieee80211_node_table *nt,
1351 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line)
1352 #else
1353 ieee80211_find_node(struct ieee80211_node_table *nt,
1354 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1355 #endif
1356 {
1357 struct ieee80211_node *ni;
1358
1359 IEEE80211_NODE_LOCK(nt);
1360 ni = ieee80211_find_node_locked(nt, macaddr);
1361 IEEE80211_NODE_UNLOCK(nt);
1362 return ni;
1363 }
1364
1365 struct ieee80211_node *
1366 #ifdef IEEE80211_DEBUG_REFCNT
1367 ieee80211_find_vap_node_locked_debug(struct ieee80211_node_table *nt,
1368 const struct ieee80211vap *vap,
1369 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line)
1370 #else
1371 ieee80211_find_vap_node_locked(struct ieee80211_node_table *nt,
1372 const struct ieee80211vap *vap,
1373 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1374 #endif
1375 {
1376 struct ieee80211_node *ni;
1377 int hash;
1378
1379 IEEE80211_NODE_LOCK_ASSERT(nt);
1380
1381 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr);
1382 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) {
1383 if (ni->ni_vap == vap &&
1384 IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) {
1385 ieee80211_ref_node(ni); /* mark referenced */
1386 #ifdef IEEE80211_DEBUG_REFCNT
1387 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1388 "%s (%s:%u) %p<%s> refcnt %d\n", __func__,
1389 func, line,
1390 ni, ether_sprintf(ni->ni_macaddr),
1391 ieee80211_node_refcnt(ni));
1392 #endif
1393 return ni;
1394 }
1395 }
1396 return NULL;
1397 }
1398
1399 struct ieee80211_node *
1400 #ifdef IEEE80211_DEBUG_REFCNT
1401 ieee80211_find_vap_node_debug(struct ieee80211_node_table *nt,
1402 const struct ieee80211vap *vap,
1403 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line)
1404 #else
1405 ieee80211_find_vap_node(struct ieee80211_node_table *nt,
1406 const struct ieee80211vap *vap,
1407 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1408 #endif
1409 {
1410 struct ieee80211_node *ni;
1411
1412 IEEE80211_NODE_LOCK(nt);
1413 ni = ieee80211_find_vap_node_locked(nt, vap, macaddr);
1414 IEEE80211_NODE_UNLOCK(nt);
1415 return ni;
1416 }
1417
1418 /*
1419 * Fake up a node; this handles node discovery in adhoc mode.
1420 * Note that for the driver's benefit we we treat this like
1421 * an association so the driver has an opportunity to setup
1422 * it's private state.
1423 */
1424 struct ieee80211_node *
1425 ieee80211_fakeup_adhoc_node(struct ieee80211vap *vap,
1426 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1427 {
1428 struct ieee80211_node *ni;
1429
1430 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE | IEEE80211_MSG_ASSOC,
1431 "%s: mac<%s>\n", __func__, ether_sprintf(macaddr));
1432 ni = ieee80211_dup_bss(vap, macaddr);
1433 if (ni != NULL) {
1434 struct ieee80211com *ic = vap->iv_ic;
1435
1436 /* XXX no rate negotiation; just dup */
1437 ni->ni_rates = vap->iv_bss->ni_rates;
1438 if (ieee80211_iserp_rateset(&ni->ni_rates))
1439 ni->ni_flags |= IEEE80211_NODE_ERP;
1440 if (vap->iv_opmode == IEEE80211_M_AHDEMO) {
1441 /*
1442 * In adhoc demo mode there are no management
1443 * frames to use to discover neighbor capabilities,
1444 * so blindly propagate the local configuration
1445 * so we can do interesting things (e.g. use
1446 * WME to disable ACK's).
1447 */
1448 if (vap->iv_flags & IEEE80211_F_WME)
1449 ni->ni_flags |= IEEE80211_NODE_QOS;
1450 #ifdef IEEE80211_SUPPORT_SUPERG
1451 if (vap->iv_flags & IEEE80211_F_FF)
1452 ni->ni_flags |= IEEE80211_NODE_FF;
1453 #endif
1454 }
1455 ieee80211_node_setuptxparms(ni);
1456 ieee80211_ratectl_node_init(ni);
1457 if (ic->ic_newassoc != NULL)
1458 ic->ic_newassoc(ni, 1);
1459 /* XXX not right for 802.1x/WPA */
1460 ieee80211_node_authorize(ni);
1461 }
1462 return ni;
1463 }
1464
1465 void
1466 ieee80211_init_neighbor(struct ieee80211_node *ni,
1467 const struct ieee80211_frame *wh,
1468 const struct ieee80211_scanparams *sp)
1469 {
1470 int do_ht_setup = 0;
1471
1472 ni->ni_esslen = sp->ssid[1];
1473 memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]);
1474 IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3);
1475 memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp));
1476 ni->ni_intval = sp->bintval;
1477 ni->ni_capinfo = sp->capinfo;
1478 ni->ni_chan = ni->ni_ic->ic_curchan;
1479 ni->ni_fhdwell = sp->fhdwell;
1480 ni->ni_fhindex = sp->fhindex;
1481 ni->ni_erp = sp->erp;
1482 ni->ni_timoff = sp->timoff;
1483 #ifdef IEEE80211_SUPPORT_MESH
1484 if (ni->ni_vap->iv_opmode == IEEE80211_M_MBSS)
1485 ieee80211_mesh_init_neighbor(ni, wh, sp);
1486 #endif
1487 if (ieee80211_ies_init(&ni->ni_ies, sp->ies, sp->ies_len)) {
1488 ieee80211_ies_expand(&ni->ni_ies);
1489 if (ni->ni_ies.wme_ie != NULL)
1490 ni->ni_flags |= IEEE80211_NODE_QOS;
1491 else
1492 ni->ni_flags &= ~IEEE80211_NODE_QOS;
1493 #ifdef IEEE80211_SUPPORT_SUPERG
1494 if (ni->ni_ies.ath_ie != NULL)
1495 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie);
1496 #endif
1497 if (ni->ni_ies.htcap_ie != NULL)
1498 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie);
1499 if (ni->ni_ies.htinfo_ie != NULL)
1500 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie);
1501
1502 if ((ni->ni_ies.htcap_ie != NULL) &&
1503 (ni->ni_ies.htinfo_ie != NULL) &&
1504 (ni->ni_vap->iv_flags_ht & IEEE80211_FHT_HT)) {
1505 do_ht_setup = 1;
1506 }
1507 }
1508
1509 /* NB: must be after ni_chan is setup */
1510 ieee80211_setup_rates(ni, sp->rates, sp->xrates,
1511 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE |
1512 IEEE80211_F_DONEGO | IEEE80211_F_DODEL);
1513
1514 /*
1515 * If the neighbor is HT compatible, flip that on.
1516 */
1517 if (do_ht_setup) {
1518 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC,
1519 "%s: doing HT setup\n", __func__);
1520 ieee80211_ht_node_init(ni);
1521 ieee80211_ht_updateparams(ni,
1522 ni->ni_ies.htcap_ie,
1523 ni->ni_ies.htinfo_ie);
1524 ieee80211_setup_htrates(ni,
1525 ni->ni_ies.htcap_ie,
1526 IEEE80211_F_JOIN | IEEE80211_F_DOBRS);
1527 ieee80211_setup_basic_htrates(ni,
1528 ni->ni_ies.htinfo_ie);
1529 ieee80211_node_setuptxparms(ni);
1530 ieee80211_ratectl_node_init(ni);
1531 }
1532 }
1533
1534 /*
1535 * Do node discovery in adhoc mode on receipt of a beacon
1536 * or probe response frame. Note that for the driver's
1537 * benefit we we treat this like an association so the
1538 * driver has an opportunity to setup it's private state.
1539 */
1540 struct ieee80211_node *
1541 ieee80211_add_neighbor(struct ieee80211vap *vap,
1542 const struct ieee80211_frame *wh,
1543 const struct ieee80211_scanparams *sp)
1544 {
1545 struct ieee80211_node *ni;
1546
1547 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC,
1548 "%s: mac<%s>\n", __func__, ether_sprintf(wh->i_addr2));
1549 ni = ieee80211_dup_bss(vap, wh->i_addr2);/* XXX alloc_node? */
1550 if (ni != NULL) {
1551 struct ieee80211com *ic = vap->iv_ic;
1552
1553 ieee80211_init_neighbor(ni, wh, sp);
1554 if (ieee80211_iserp_rateset(&ni->ni_rates))
1555 ni->ni_flags |= IEEE80211_NODE_ERP;
1556 ieee80211_node_setuptxparms(ni);
1557 ieee80211_ratectl_node_init(ni);
1558 if (ic->ic_newassoc != NULL)
1559 ic->ic_newassoc(ni, 1);
1560 /* XXX not right for 802.1x/WPA */
1561 ieee80211_node_authorize(ni);
1562 }
1563 return ni;
1564 }
1565
1566 #define IS_PROBEREQ(wh) \
1567 ((wh->i_fc[0] & (IEEE80211_FC0_TYPE_MASK|IEEE80211_FC0_SUBTYPE_MASK)) \
1568 == (IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ))
1569 #define IS_BCAST_PROBEREQ(wh) \
1570 (IS_PROBEREQ(wh) && IEEE80211_IS_MULTICAST( \
1571 ((const struct ieee80211_frame *)(wh))->i_addr3))
1572
1573 static __inline struct ieee80211_node *
1574 _find_rxnode(struct ieee80211_node_table *nt,
1575 const struct ieee80211_frame_min *wh)
1576 {
1577 if (IS_BCAST_PROBEREQ(wh))
1578 return NULL; /* spam bcast probe req to all vap's */
1579 return ieee80211_find_node_locked(nt, wh->i_addr2);
1580 }
1581
1582 /*
1583 * Locate the node for sender, track state, and then pass the
1584 * (referenced) node up to the 802.11 layer for its use. Note
1585 * we can return NULL if the sender is not in the table.
1586 */
1587 struct ieee80211_node *
1588 #ifdef IEEE80211_DEBUG_REFCNT
1589 ieee80211_find_rxnode_debug(struct ieee80211com *ic,
1590 const struct ieee80211_frame_min *wh, const char *func, int line)
1591 #else
1592 ieee80211_find_rxnode(struct ieee80211com *ic,
1593 const struct ieee80211_frame_min *wh)
1594 #endif
1595 {
1596 struct ieee80211_node_table *nt;
1597 struct ieee80211_node *ni;
1598
1599 nt = &ic->ic_sta;
1600 IEEE80211_NODE_LOCK(nt);
1601 ni = _find_rxnode(nt, wh);
1602 IEEE80211_NODE_UNLOCK(nt);
1603
1604 return ni;
1605 }
1606
1607 /*
1608 * Like ieee80211_find_rxnode but use the supplied h/w
1609 * key index as a hint to locate the node in the key
1610 * mapping table. If an entry is present at the key
1611 * index we return it; otherwise do a normal lookup and
1612 * update the mapping table if the station has a unicast
1613 * key assigned to it.
1614 */
1615 struct ieee80211_node *
1616 #ifdef IEEE80211_DEBUG_REFCNT
1617 ieee80211_find_rxnode_withkey_debug(struct ieee80211com *ic,
1618 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix,
1619 const char *func, int line)
1620 #else
1621 ieee80211_find_rxnode_withkey(struct ieee80211com *ic,
1622 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix)
1623 #endif
1624 {
1625 struct ieee80211_node_table *nt;
1626 struct ieee80211_node *ni;
1627
1628 nt = &ic->ic_sta;
1629 IEEE80211_NODE_LOCK(nt);
1630 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax)
1631 ni = nt->nt_keyixmap[keyix];
1632 else
1633 ni = NULL;
1634 if (ni == NULL) {
1635 ni = _find_rxnode(nt, wh);
1636 if (ni != NULL && nt->nt_keyixmap != NULL) {
1637 /*
1638 * If the station has a unicast key cache slot
1639 * assigned update the key->node mapping table.
1640 */
1641 keyix = ni->ni_ucastkey.wk_rxkeyix;
1642 /* XXX can keyixmap[keyix] != NULL? */
1643 if (keyix < nt->nt_keyixmax &&
1644 nt->nt_keyixmap[keyix] == NULL) {
1645 IEEE80211_DPRINTF(ni->ni_vap,
1646 IEEE80211_MSG_NODE,
1647 "%s: add key map entry %p<%s> refcnt %d\n",
1648 __func__, ni, ether_sprintf(ni->ni_macaddr),
1649 ieee80211_node_refcnt(ni)+1);
1650 nt->nt_keyixmap[keyix] = ieee80211_ref_node(ni);
1651 }
1652 }
1653 } else {
1654 if (IS_BCAST_PROBEREQ(wh))
1655 ni = NULL; /* spam bcast probe req to all vap's */
1656 else
1657 ieee80211_ref_node(ni);
1658 }
1659 IEEE80211_NODE_UNLOCK(nt);
1660
1661 return ni;
1662 }
1663 #undef IS_BCAST_PROBEREQ
1664 #undef IS_PROBEREQ
1665
1666 /*
1667 * Return a reference to the appropriate node for sending
1668 * a data frame. This handles node discovery in adhoc networks.
1669 */
1670 struct ieee80211_node *
1671 #ifdef IEEE80211_DEBUG_REFCNT
1672 ieee80211_find_txnode_debug(struct ieee80211vap *vap,
1673 const uint8_t macaddr[IEEE80211_ADDR_LEN],
1674 const char *func, int line)
1675 #else
1676 ieee80211_find_txnode(struct ieee80211vap *vap,
1677 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1678 #endif
1679 {
1680 struct ieee80211_node_table *nt = &vap->iv_ic->ic_sta;
1681 struct ieee80211_node *ni;
1682
1683 /*
1684 * The destination address should be in the node table
1685 * unless this is a multicast/broadcast frame. We can
1686 * also optimize station mode operation, all frames go
1687 * to the bss node.
1688 */
1689 /* XXX can't hold lock across dup_bss 'cuz of recursive locking */
1690 IEEE80211_NODE_LOCK(nt);
1691 if (vap->iv_opmode == IEEE80211_M_STA ||
1692 vap->iv_opmode == IEEE80211_M_WDS ||
1693 IEEE80211_IS_MULTICAST(macaddr))
1694 ni = ieee80211_ref_node(vap->iv_bss);
1695 else
1696 ni = ieee80211_find_node_locked(nt, macaddr);
1697 IEEE80211_NODE_UNLOCK(nt);
1698
1699 if (ni == NULL) {
1700 if (vap->iv_opmode == IEEE80211_M_IBSS ||
1701 vap->iv_opmode == IEEE80211_M_AHDEMO) {
1702 /*
1703 * In adhoc mode cons up a node for the destination.
1704 * Note that we need an additional reference for the
1705 * caller to be consistent with
1706 * ieee80211_find_node_locked.
1707 */
1708 ni = ieee80211_fakeup_adhoc_node(vap, macaddr);
1709 if (ni != NULL)
1710 (void) ieee80211_ref_node(ni);
1711 } else {
1712 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, macaddr,
1713 "no node, discard frame (%s)", __func__);
1714 vap->iv_stats.is_tx_nonode++;
1715 }
1716 }
1717 return ni;
1718 }
1719
1720 static void
1721 _ieee80211_free_node(struct ieee80211_node *ni)
1722 {
1723 struct ieee80211_node_table *nt = ni->ni_table;
1724
1725 /*
1726 * NB: careful about referencing the vap as it may be
1727 * gone if the last reference was held by a driver.
1728 * We know the com will always be present so it's safe
1729 * to use ni_ic below to reclaim resources.
1730 */
1731 #if 0
1732 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1733 "%s %p<%s> in %s table\n", __func__, ni,
1734 ether_sprintf(ni->ni_macaddr),
1735 nt != NULL ? nt->nt_name : "<gone>");
1736 #endif
1737 if (ni->ni_associd != 0) {
1738 struct ieee80211vap *vap = ni->ni_vap;
1739 if (vap->iv_aid_bitmap != NULL)
1740 IEEE80211_AID_CLR(vap, ni->ni_associd);
1741 }
1742 if (nt != NULL) {
1743 TAILQ_REMOVE(&nt->nt_node, ni, ni_list);
1744 LIST_REMOVE(ni, ni_hash);
1745 }
1746 ni->ni_ic->ic_node_free(ni);
1747 }
1748
1749 void
1750 #ifdef IEEE80211_DEBUG_REFCNT
1751 ieee80211_free_node_debug(struct ieee80211_node *ni, const char *func, int line)
1752 #else
1753 ieee80211_free_node(struct ieee80211_node *ni)
1754 #endif
1755 {
1756 struct ieee80211_node_table *nt = ni->ni_table;
1757
1758 #ifdef IEEE80211_DEBUG_REFCNT
1759 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1760 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni,
1761 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1);
1762 #endif
1763 if (nt != NULL) {
1764 IEEE80211_NODE_LOCK(nt);
1765 if (ieee80211_node_dectestref(ni)) {
1766 /*
1767 * Last reference, reclaim state.
1768 */
1769 _ieee80211_free_node(ni);
1770 } else if (ieee80211_node_refcnt(ni) == 1 &&
1771 nt->nt_keyixmap != NULL) {
1772 ieee80211_keyix keyix;
1773 /*
1774 * Check for a last reference in the key mapping table.
1775 */
1776 keyix = ni->ni_ucastkey.wk_rxkeyix;
1777 if (keyix < nt->nt_keyixmax &&
1778 nt->nt_keyixmap[keyix] == ni) {
1779 IEEE80211_DPRINTF(ni->ni_vap,
1780 IEEE80211_MSG_NODE,
1781 "%s: %p<%s> clear key map entry", __func__,
1782 ni, ether_sprintf(ni->ni_macaddr));
1783 nt->nt_keyixmap[keyix] = NULL;
1784 ieee80211_node_decref(ni); /* XXX needed? */
1785 _ieee80211_free_node(ni);
1786 }
1787 }
1788 IEEE80211_NODE_UNLOCK(nt);
1789 } else {
1790 if (ieee80211_node_dectestref(ni))
1791 _ieee80211_free_node(ni);
1792 }
1793 }
1794
1795 /*
1796 * Reclaim a unicast key and clear any key cache state.
1797 */
1798 int
1799 ieee80211_node_delucastkey(struct ieee80211_node *ni)
1800 {
1801 struct ieee80211com *ic = ni->ni_ic;
1802 struct ieee80211_node_table *nt = &ic->ic_sta;
1803 struct ieee80211_node *nikey;
1804 ieee80211_keyix keyix;
1805 int isowned, status;
1806
1807 /*
1808 * NB: We must beware of LOR here; deleting the key
1809 * can cause the crypto layer to block traffic updates
1810 * which can generate a LOR against the node table lock;
1811 * grab it here and stash the key index for our use below.
1812 *
1813 * Must also beware of recursion on the node table lock.
1814 * When called from node_cleanup we may already have
1815 * the node table lock held. Unfortunately there's no
1816 * way to separate out this path so we must do this
1817 * conditionally.
1818 */
1819 isowned = IEEE80211_NODE_IS_LOCKED(nt);
1820 if (!isowned)
1821 IEEE80211_NODE_LOCK(nt);
1822 nikey = NULL;
1823 status = 1; /* NB: success */
1824 if (ni->ni_ucastkey.wk_keyix != IEEE80211_KEYIX_NONE) {
1825 keyix = ni->ni_ucastkey.wk_rxkeyix;
1826 status = ieee80211_crypto_delkey(ni->ni_vap, &ni->ni_ucastkey);
1827 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) {
1828 nikey = nt->nt_keyixmap[keyix];
1829 nt->nt_keyixmap[keyix] = NULL;
1830 }
1831 }
1832 if (!isowned)
1833 IEEE80211_NODE_UNLOCK(nt);
1834
1835 if (nikey != NULL) {
1836 KASSERT(nikey == ni,
1837 ("key map out of sync, ni %p nikey %p", ni, nikey));
1838 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1839 "%s: delete key map entry %p<%s> refcnt %d\n",
1840 __func__, ni, ether_sprintf(ni->ni_macaddr),
1841 ieee80211_node_refcnt(ni)-1);
1842 ieee80211_free_node(ni);
1843 }
1844 return status;
1845 }
1846
1847 /*
1848 * Reclaim a node. If this is the last reference count then
1849 * do the normal free work. Otherwise remove it from the node
1850 * table and mark it gone by clearing the back-reference.
1851 */
1852 static void
1853 node_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni)
1854 {
1855 ieee80211_keyix keyix;
1856
1857 IEEE80211_NODE_LOCK_ASSERT(nt);
1858
1859 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1860 "%s: remove %p<%s> from %s table, refcnt %d\n",
1861 __func__, ni, ether_sprintf(ni->ni_macaddr),
1862 nt->nt_name, ieee80211_node_refcnt(ni)-1);
1863 /*
1864 * Clear any entry in the unicast key mapping table.
1865 * We need to do it here so rx lookups don't find it
1866 * in the mapping table even if it's not in the hash
1867 * table. We cannot depend on the mapping table entry
1868 * being cleared because the node may not be free'd.
1869 */
1870 keyix = ni->ni_ucastkey.wk_rxkeyix;
1871 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax &&
1872 nt->nt_keyixmap[keyix] == ni) {
1873 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1874 "%s: %p<%s> clear key map entry %u\n",
1875 __func__, ni, ether_sprintf(ni->ni_macaddr), keyix);
1876 nt->nt_keyixmap[keyix] = NULL;
1877 ieee80211_node_decref(ni); /* NB: don't need free */
1878 }
1879 if (!ieee80211_node_dectestref(ni)) {
1880 /*
1881 * Other references are present, just remove the
1882 * node from the table so it cannot be found. When
1883 * the references are dropped storage will be
1884 * reclaimed.
1885 */
1886 TAILQ_REMOVE(&nt->nt_node, ni, ni_list);
1887 LIST_REMOVE(ni, ni_hash);
1888 ni->ni_table = NULL; /* clear reference */
1889 } else
1890 _ieee80211_free_node(ni);
1891 }
1892
1893 /*
1894 * Node table support.
1895 */
1896
1897 static void
1898 ieee80211_node_table_init(struct ieee80211com *ic,
1899 struct ieee80211_node_table *nt,
1900 const char *name, int inact, int keyixmax)
1901 {
1902 struct ifnet *ifp = ic->ic_ifp;
1903
1904 nt->nt_ic = ic;
1905 IEEE80211_NODE_LOCK_INIT(nt, ifp->if_xname);
1906 IEEE80211_NODE_ITERATE_LOCK_INIT(nt, ifp->if_xname);
1907 TAILQ_INIT(&nt->nt_node);
1908 nt->nt_name = name;
1909 nt->nt_scangen = 1;
1910 nt->nt_inact_init = inact;
1911 nt->nt_keyixmax = keyixmax;
1912 if (nt->nt_keyixmax > 0) {
1913 nt->nt_keyixmap = (struct ieee80211_node **) malloc(
1914 keyixmax * sizeof(struct ieee80211_node *),
1915 M_80211_NODE, M_NOWAIT | M_ZERO);
1916 if (nt->nt_keyixmap == NULL)
1917 if_printf(ic->ic_ifp,
1918 "Cannot allocate key index map with %u entries\n",
1919 keyixmax);
1920 } else
1921 nt->nt_keyixmap = NULL;
1922 }
1923
1924 static void
1925 ieee80211_node_table_reset(struct ieee80211_node_table *nt,
1926 struct ieee80211vap *match)
1927 {
1928 struct ieee80211_node *ni, *next;
1929
1930 IEEE80211_NODE_LOCK(nt);
1931 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) {
1932 if (match != NULL && ni->ni_vap != match)
1933 continue;
1934 /* XXX can this happen? if so need's work */
1935 if (ni->ni_associd != 0) {
1936 struct ieee80211vap *vap = ni->ni_vap;
1937
1938 if (vap->iv_auth->ia_node_leave != NULL)
1939 vap->iv_auth->ia_node_leave(ni);
1940 if (vap->iv_aid_bitmap != NULL)
1941 IEEE80211_AID_CLR(vap, ni->ni_associd);
1942 }
1943 ni->ni_wdsvap = NULL; /* clear reference */
1944 node_reclaim(nt, ni);
1945 }
1946 if (match != NULL && match->iv_opmode == IEEE80211_M_WDS) {
1947 /*
1948 * Make a separate pass to clear references to this vap
1949 * held by DWDS entries. They will not be matched above
1950 * because ni_vap will point to the ap vap but we still
1951 * need to clear ni_wdsvap when the WDS vap is destroyed
1952 * and/or reset.
1953 */
1954 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next)
1955 if (ni->ni_wdsvap == match)
1956 ni->ni_wdsvap = NULL;
1957 }
1958 IEEE80211_NODE_UNLOCK(nt);
1959 }
1960
1961 static void
1962 ieee80211_node_table_cleanup(struct ieee80211_node_table *nt)
1963 {
1964 ieee80211_node_table_reset(nt, NULL);
1965 if (nt->nt_keyixmap != NULL) {
1966 #ifdef DIAGNOSTIC
1967 /* XXX verify all entries are NULL */
1968 int i;
1969 for (i = 0; i < nt->nt_keyixmax; i++)
1970 if (nt->nt_keyixmap[i] != NULL)
1971 printf("%s: %s[%u] still active\n", __func__,
1972 nt->nt_name, i);
1973 #endif
1974 free(nt->nt_keyixmap, M_80211_NODE);
1975 nt->nt_keyixmap = NULL;
1976 }
1977 IEEE80211_NODE_ITERATE_LOCK_DESTROY(nt);
1978 IEEE80211_NODE_LOCK_DESTROY(nt);
1979 }
1980
1981 /*
1982 * Timeout inactive stations and do related housekeeping.
1983 * Note that we cannot hold the node lock while sending a
1984 * frame as this would lead to a LOR. Instead we use a
1985 * generation number to mark nodes that we've scanned and
1986 * drop the lock and restart a scan if we have to time out
1987 * a node. Since we are single-threaded by virtue of
1988 * controlling the inactivity timer we can be sure this will
1989 * process each node only once.
1990 */
1991 static void
1992 ieee80211_timeout_stations(struct ieee80211com *ic)
1993 {
1994 struct ieee80211_node_table *nt = &ic->ic_sta;
1995 struct ieee80211vap *vap;
1996 struct ieee80211_node *ni;
1997 int gen = 0;
1998
1999 IEEE80211_NODE_ITERATE_LOCK(nt);
2000 gen = ++nt->nt_scangen;
2001 restart:
2002 IEEE80211_NODE_LOCK(nt);
2003 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) {
2004 if (ni->ni_scangen == gen) /* previously handled */
2005 continue;
2006 ni->ni_scangen = gen;
2007 /*
2008 * Ignore entries for which have yet to receive an
2009 * authentication frame. These are transient and
2010 * will be reclaimed when the last reference to them
2011 * goes away (when frame xmits complete).
2012 */
2013 vap = ni->ni_vap;
2014 /*
2015 * Only process stations when in RUN state. This
2016 * insures, for example, that we don't timeout an
2017 * inactive station during CAC. Note that CSA state
2018 * is actually handled in ieee80211_node_timeout as
2019 * it applies to more than timeout processing.
2020 */
2021 if (vap->iv_state != IEEE80211_S_RUN)
2022 continue;
2023 /* XXX can vap be NULL? */
2024 if ((vap->iv_opmode == IEEE80211_M_HOSTAP ||
2025 vap->iv_opmode == IEEE80211_M_STA) &&
2026 (ni->ni_flags & IEEE80211_NODE_AREF) == 0)
2027 continue;
2028 /*
2029 * Free fragment if not needed anymore
2030 * (last fragment older than 1s).
2031 * XXX doesn't belong here, move to node_age
2032 */
2033 if (ni->ni_rxfrag[0] != NULL &&
2034 ticks > ni->ni_rxfragstamp + hz) {
2035 m_freem(ni->ni_rxfrag[0]);
2036 ni->ni_rxfrag[0] = NULL;
2037 }
2038 if (ni->ni_inact > 0) {
2039 ni->ni_inact--;
2040 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni,
2041 "%s: inact %u inact_reload %u nrates %u",
2042 __func__, ni->ni_inact, ni->ni_inact_reload,
2043 ni->ni_rates.rs_nrates);
2044 }
2045 /*
2046 * Special case ourself; we may be idle for extended periods
2047 * of time and regardless reclaiming our state is wrong.
2048 * XXX run ic_node_age
2049 */
2050 if (ni == vap->iv_bss)
2051 continue;
2052 if (ni->ni_associd != 0 ||
2053 (vap->iv_opmode == IEEE80211_M_IBSS ||
2054 vap->iv_opmode == IEEE80211_M_AHDEMO)) {
2055 /*
2056 * Age/drain resources held by the station.
2057 */
2058 ic->ic_node_age(ni);
2059 /*
2060 * Probe the station before time it out. We
2061 * send a null data frame which may not be
2062 * universally supported by drivers (need it
2063 * for ps-poll support so it should be...).
2064 *
2065 * XXX don't probe the station unless we've
2066 * received a frame from them (and have
2067 * some idea of the rates they are capable
2068 * of); this will get fixed more properly
2069 * soon with better handling of the rate set.
2070 */
2071 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) &&
2072 (0 < ni->ni_inact &&
2073 ni->ni_inact <= vap->iv_inact_probe) &&
2074 ni->ni_rates.rs_nrates != 0) {
2075 IEEE80211_NOTE(vap,
2076 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE,
2077 ni, "%s",
2078 "probe station due to inactivity");
2079 /*
2080 * Grab a reference before unlocking the table
2081 * so the node cannot be reclaimed before we
2082 * send the frame. ieee80211_send_nulldata
2083 * understands we've done this and reclaims the
2084 * ref for us as needed.
2085 */
2086 ieee80211_ref_node(ni);
2087 IEEE80211_NODE_UNLOCK(nt);
2088 ieee80211_send_nulldata(ni);
2089 /* XXX stat? */
2090 goto restart;
2091 }
2092 }
2093 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) &&
2094 ni->ni_inact <= 0) {
2095 IEEE80211_NOTE(vap,
2096 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, ni,
2097 "station timed out due to inactivity "
2098 "(refcnt %u)", ieee80211_node_refcnt(ni));
2099 /*
2100 * Send a deauthenticate frame and drop the station.
2101 * This is somewhat complicated due to reference counts
2102 * and locking. At this point a station will typically
2103 * have a reference count of 1. ieee80211_node_leave
2104 * will do a "free" of the node which will drop the
2105 * reference count. But in the meantime a reference
2106 * wil be held by the deauth frame. The actual reclaim
2107 * of the node will happen either after the tx is
2108 * completed or by ieee80211_node_leave.
2109 *
2110 * Separately we must drop the node lock before sending
2111 * in case the driver takes a lock, as this can result
2112 * in a LOR between the node lock and the driver lock.
2113 */
2114 ieee80211_ref_node(ni);
2115 IEEE80211_NODE_UNLOCK(nt);
2116 if (ni->ni_associd != 0) {
2117 IEEE80211_SEND_MGMT(ni,
2118 IEEE80211_FC0_SUBTYPE_DEAUTH,
2119 IEEE80211_REASON_AUTH_EXPIRE);
2120 }
2121 ieee80211_node_leave(ni);
2122 ieee80211_free_node(ni);
2123 vap->iv_stats.is_node_timeout++;
2124 goto restart;
2125 }
2126 }
2127 IEEE80211_NODE_UNLOCK(nt);
2128
2129 IEEE80211_NODE_ITERATE_UNLOCK(nt);
2130 }
2131
2132 /*
2133 * Aggressively reclaim resources. This should be used
2134 * only in a critical situation to reclaim mbuf resources.
2135 */
2136 void
2137 ieee80211_drain(struct ieee80211com *ic)
2138 {
2139 struct ieee80211_node_table *nt = &ic->ic_sta;
2140 struct ieee80211vap *vap;
2141 struct ieee80211_node *ni;
2142
2143 IEEE80211_NODE_LOCK(nt);
2144 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) {
2145 /*
2146 * Ignore entries for which have yet to receive an
2147 * authentication frame. These are transient and
2148 * will be reclaimed when the last reference to them
2149 * goes away (when frame xmits complete).
2150 */
2151 vap = ni->ni_vap;
2152 /*
2153 * Only process stations when in RUN state. This
2154 * insures, for example, that we don't timeout an
2155 * inactive station during CAC. Note that CSA state
2156 * is actually handled in ieee80211_node_timeout as
2157 * it applies to more than timeout processing.
2158 */
2159 if (vap->iv_state != IEEE80211_S_RUN)
2160 continue;
2161 /* XXX can vap be NULL? */
2162 if ((vap->iv_opmode == IEEE80211_M_HOSTAP ||
2163 vap->iv_opmode == IEEE80211_M_STA) &&
2164 (ni->ni_flags & IEEE80211_NODE_AREF) == 0)
2165 continue;
2166 /*
2167 * Free fragments.
2168 * XXX doesn't belong here, move to node_drain
2169 */
2170 if (ni->ni_rxfrag[0] != NULL) {
2171 m_freem(ni->ni_rxfrag[0]);
2172 ni->ni_rxfrag[0] = NULL;
2173 }
2174 /*
2175 * Drain resources held by the station.
2176 */
2177 ic->ic_node_drain(ni);
2178 }
2179 IEEE80211_NODE_UNLOCK(nt);
2180 }
2181
2182 /*
2183 * Per-ieee80211com inactivity timer callback.
2184 */
2185 void
2186 ieee80211_node_timeout(void *arg)
2187 {
2188 struct ieee80211com *ic = arg;
2189
2190 /*
2191 * Defer timeout processing if a channel switch is pending.
2192 * We typically need to be mute so not doing things that
2193 * might generate frames is good to handle in one place.
2194 * Supressing the station timeout processing may extend the
2195 * lifetime of inactive stations (by not decrementing their
2196 * idle counters) but this should be ok unless the CSA is
2197 * active for an unusually long time.
2198 */
2199 if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) {
2200 ieee80211_scan_timeout(ic);
2201 ieee80211_timeout_stations(ic);
2202 ieee80211_ageq_age(&ic->ic_stageq, IEEE80211_INACT_WAIT);
2203
2204 IEEE80211_LOCK(ic);
2205 ieee80211_erp_timeout(ic);
2206 ieee80211_ht_timeout(ic);
2207 IEEE80211_UNLOCK(ic);
2208 }
2209 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz,
2210 ieee80211_node_timeout, ic);
2211 }
2212
2213 /*
2214 * Iterate over the node table and return an array of ref'ed nodes.
2215 *
2216 * This is separated out from calling the actual node function so that
2217 * no LORs will occur.
2218 *
2219 * If there are too many nodes (ie, the number of nodes doesn't fit
2220 * within 'max_aid' entries) then the node references will be freed
2221 * and an error will be returned.
2222 *
2223 * The responsibility of allocating and freeing "ni_arr" is up to
2224 * the caller.
2225 */
2226 int
2227 ieee80211_iterate_nt(struct ieee80211_node_table *nt,
2228 struct ieee80211_node **ni_arr, uint16_t max_aid)
2229 {
2230 u_int gen;
2231 int i, j, ret;
2232 struct ieee80211_node *ni;
2233
2234 IEEE80211_NODE_ITERATE_LOCK(nt);
2235 IEEE80211_NODE_LOCK(nt);
2236
2237 gen = ++nt->nt_scangen;
2238 i = ret = 0;
2239
2240 /*
2241 * We simply assume here that since the node
2242 * scan generation doesn't change (as
2243 * we are holding both the node table and
2244 * node table iteration locks), we can simply
2245 * assign it to the node here.
2246 */
2247 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) {
2248 if (i >= max_aid) {
2249 ret = E2BIG;
2250 if_printf(nt->nt_ic->ic_ifp,
2251 "Node array overflow: max=%u", max_aid);
2252 break;
2253 }
2254 ni_arr[i] = ieee80211_ref_node(ni);
2255 ni_arr[i]->ni_scangen = gen;
2256 i++;
2257 }
2258
2259 /*
2260 * It's safe to unlock here.
2261 *
2262 * If we're successful, the list is returned.
2263 * If we're unsuccessful, the list is ignored
2264 * and we remove our references.
2265 *
2266 * This avoids any potential LOR with
2267 * ieee80211_free_node().
2268 */
2269 IEEE80211_NODE_UNLOCK(nt);
2270 IEEE80211_NODE_ITERATE_UNLOCK(nt);
2271
2272 /*
2273 * If ret is non-zero, we hit some kind of error.
2274 * Rather than walking some nodes, we'll walk none
2275 * of them.
2276 */
2277 if (ret) {
2278 for (j = 0; j < i; j++) {
2279 /* ieee80211_free_node() locks by itself */
2280 ieee80211_free_node(ni_arr[j]);
2281 }
2282 }
2283
2284 return (ret);
2285 }
2286
2287 /*
2288 * Just a wrapper, so we don't have to change every ieee80211_iterate_nodes()
2289 * reference in the source.
2290 *
2291 * Note that this fetches 'max_aid' from the first VAP, rather than finding
2292 * the largest max_aid from all VAPs.
2293 */
2294 void
2295 ieee80211_iterate_nodes(struct ieee80211_node_table *nt,
2296 ieee80211_iter_func *f, void *arg)
2297 {
2298 struct ieee80211_node **ni_arr;
2299 size_t size;
2300 int i;
2301 uint16_t max_aid;
2302 struct ieee80211vap *vap;
2303
2304 /* Overdoing it default */
2305 max_aid = IEEE80211_AID_MAX;
2306
2307 /* Handle the case of there being no vaps just yet */
2308 vap = TAILQ_FIRST(&nt->nt_ic->ic_vaps);
2309 if (vap != NULL)
2310 max_aid = vap->iv_max_aid;
2311
2312 size = max_aid * sizeof(struct ieee80211_node *);
2313 ni_arr = (struct ieee80211_node **) malloc(size, M_80211_NODE,
2314 M_NOWAIT | M_ZERO);
2315 if (ni_arr == NULL)
2316 return;
2317
2318 /*
2319 * If this fails, the node table won't have any
2320 * valid entries - ieee80211_iterate_nt() frees
2321 * the references to them. So don't try walking
2322 * the table; just skip to the end and free the
2323 * temporary memory.
2324 */
2325 if (ieee80211_iterate_nt(nt, ni_arr, max_aid) != 0)
2326 goto done;
2327
2328 for (i = 0; i < max_aid; i++) {
2329 if (ni_arr[i] == NULL) /* end of the list */
2330 break;
2331 (*f)(arg, ni_arr[i]);
2332 /* ieee80211_free_node() locks by itself */
2333 ieee80211_free_node(ni_arr[i]);
2334 }
2335
2336 done:
2337 free(ni_arr, M_80211_NODE);
2338 }
2339
2340 void
2341 ieee80211_dump_node(struct ieee80211_node_table *nt, struct ieee80211_node *ni)
2342 {
2343 printf("0x%p: mac %s refcnt %d\n", ni,
2344 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni));
2345 printf("\tscangen %u authmode %u flags 0x%x\n",
2346 ni->ni_scangen, ni->ni_authmode, ni->ni_flags);
2347 printf("\tassocid 0x%x txpower %u vlan %u\n",
2348 ni->ni_associd, ni->ni_txpower, ni->ni_vlan);
2349 printf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n",
2350 ni->ni_txseqs[IEEE80211_NONQOS_TID],
2351 ni->ni_rxseqs[IEEE80211_NONQOS_TID] >> IEEE80211_SEQ_SEQ_SHIFT,
2352 ni->ni_rxseqs[IEEE80211_NONQOS_TID] & IEEE80211_SEQ_FRAG_MASK,
2353 ni->ni_rxfragstamp);
2354 printf("\trssi %d noise %d intval %u capinfo 0x%x\n",
2355 node_getrssi(ni), ni->ni_noise,
2356 ni->ni_intval, ni->ni_capinfo);
2357 printf("\tbssid %s essid \"%.*s\" channel %u:0x%x\n",
2358 ether_sprintf(ni->ni_bssid),
2359 ni->ni_esslen, ni->ni_essid,
2360 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags);
2361 printf("\tinact %u inact_reload %u txrate %u\n",
2362 ni->ni_inact, ni->ni_inact_reload, ni->ni_txrate);
2363 printf("\thtcap %x htparam %x htctlchan %u ht2ndchan %u\n",
2364 ni->ni_htcap, ni->ni_htparam,
2365 ni->ni_htctlchan, ni->ni_ht2ndchan);
2366 printf("\thtopmode %x htstbc %x chw %u\n",
2367 ni->ni_htopmode, ni->ni_htstbc, ni->ni_chw);
2368 }
2369
2370 void
2371 ieee80211_dump_nodes(struct ieee80211_node_table *nt)
2372 {
2373 ieee80211_iterate_nodes(nt,
2374 (ieee80211_iter_func *) ieee80211_dump_node, nt);
2375 }
2376
2377 static void
2378 ieee80211_notify_erp_locked(struct ieee80211com *ic)
2379 {
2380 struct ieee80211vap *vap;
2381
2382 IEEE80211_LOCK_ASSERT(ic);
2383
2384 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
2385 if (vap->iv_opmode == IEEE80211_M_HOSTAP)
2386 ieee80211_beacon_notify(vap, IEEE80211_BEACON_ERP);
2387 }
2388
2389 void
2390 ieee80211_notify_erp(struct ieee80211com *ic)
2391 {
2392 IEEE80211_LOCK(ic);
2393 ieee80211_notify_erp_locked(ic);
2394 IEEE80211_UNLOCK(ic);
2395 }
2396
2397 /*
2398 * Handle a station joining an 11g network.
2399 */
2400 static void
2401 ieee80211_node_join_11g(struct ieee80211_node *ni)
2402 {
2403 struct ieee80211com *ic = ni->ni_ic;
2404
2405 IEEE80211_LOCK_ASSERT(ic);
2406
2407 /*
2408 * Station isn't capable of short slot time. Bump
2409 * the count of long slot time stations and disable
2410 * use of short slot time. Note that the actual switch
2411 * over to long slot time use may not occur until the
2412 * next beacon transmission (per sec. 7.3.1.4 of 11g).
2413 */
2414 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) {
2415 ic->ic_longslotsta++;
2416 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2417 "station needs long slot time, count %d",
2418 ic->ic_longslotsta);
2419 /* XXX vap's w/ conflicting needs won't work */
2420 if (!IEEE80211_IS_CHAN_108G(ic->ic_bsschan)) {
2421 /*
2422 * Don't force slot time when switched to turbo
2423 * mode as non-ERP stations won't be present; this
2424 * need only be done when on the normal G channel.
2425 */
2426 ieee80211_set_shortslottime(ic, 0);
2427 }
2428 }
2429 /*
2430 * If the new station is not an ERP station
2431 * then bump the counter and enable protection
2432 * if configured.
2433 */
2434 if (!ieee80211_iserp_rateset(&ni->ni_rates)) {
2435 ic->ic_nonerpsta++;
2436 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2437 "station is !ERP, %d non-ERP stations associated",
2438 ic->ic_nonerpsta);
2439 /*
2440 * If station does not support short preamble
2441 * then we must enable use of Barker preamble.
2442 */
2443 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) {
2444 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2445 "%s", "station needs long preamble");
2446 ic->ic_flags |= IEEE80211_F_USEBARKER;
2447 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE;
2448 }
2449 /*
2450 * If protection is configured and this is the first
2451 * indication we should use protection, enable it.
2452 */
2453 if (ic->ic_protmode != IEEE80211_PROT_NONE &&
2454 ic->ic_nonerpsta == 1 &&
2455 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) {
2456 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC,
2457 "%s: enable use of protection\n", __func__);
2458 ic->ic_flags |= IEEE80211_F_USEPROT;
2459 ieee80211_notify_erp_locked(ic);
2460 }
2461 } else
2462 ni->ni_flags |= IEEE80211_NODE_ERP;
2463 }
2464
2465 void
2466 ieee80211_node_join(struct ieee80211_node *ni, int resp)
2467 {
2468 struct ieee80211com *ic = ni->ni_ic;
2469 struct ieee80211vap *vap = ni->ni_vap;
2470 int newassoc;
2471
2472 if (ni->ni_associd == 0) {
2473 uint16_t aid;
2474
2475 KASSERT(vap->iv_aid_bitmap != NULL, ("no aid bitmap"));
2476 /*
2477 * It would be good to search the bitmap
2478 * more efficiently, but this will do for now.
2479 */
2480 for (aid = 1; aid < vap->iv_max_aid; aid++) {
2481 if (!IEEE80211_AID_ISSET(vap, aid))
2482 break;
2483 }
2484 if (aid >= vap->iv_max_aid) {
2485 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_TOOMANY);
2486 ieee80211_node_leave(ni);
2487 return;
2488 }
2489 ni->ni_associd = aid | 0xc000;
2490 ni->ni_jointime = time_uptime;
2491 IEEE80211_LOCK(ic);
2492 IEEE80211_AID_SET(vap, ni->ni_associd);
2493 vap->iv_sta_assoc++;
2494 ic->ic_sta_assoc++;
2495
2496 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan))
2497 ieee80211_ht_node_join(ni);
2498 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) &&
2499 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan))
2500 ieee80211_node_join_11g(ni);
2501 IEEE80211_UNLOCK(ic);
2502
2503 newassoc = 1;
2504 } else
2505 newassoc = 0;
2506
2507 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni,
2508 "station associated at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s",
2509 IEEE80211_NODE_AID(ni),
2510 ic->ic_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long",
2511 ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long",
2512 ic->ic_flags & IEEE80211_F_USEPROT ? ", protection" : "",
2513 ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "",
2514 ni->ni_flags & IEEE80211_NODE_HT ?
2515 (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "",
2516 ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "",
2517 ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" :
2518 ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "",
2519 ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "",
2520 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ?
2521 ", fast-frames" : "",
2522 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ?
2523 ", turbo" : ""
2524 );
2525
2526 ieee80211_node_setuptxparms(ni);
2527 ieee80211_ratectl_node_init(ni);
2528 /* give driver a chance to setup state like ni_txrate */
2529 if (ic->ic_newassoc != NULL)
2530 ic->ic_newassoc(ni, newassoc);
2531 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_SUCCESS);
2532 /* tell the authenticator about new station */
2533 if (vap->iv_auth->ia_node_join != NULL)
2534 vap->iv_auth->ia_node_join(ni);
2535 ieee80211_notify_node_join(ni,
2536 resp == IEEE80211_FC0_SUBTYPE_ASSOC_RESP);
2537 }
2538
2539 static void
2540 disable_protection(struct ieee80211com *ic)
2541 {
2542 KASSERT(ic->ic_nonerpsta == 0 &&
2543 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0,
2544 ("%d non ERP stations, flags 0x%x", ic->ic_nonerpsta,
2545 ic->ic_flags_ext));
2546
2547 ic->ic_flags &= ~IEEE80211_F_USEPROT;
2548 /* XXX verify mode? */
2549 if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) {
2550 ic->ic_flags |= IEEE80211_F_SHPREAMBLE;
2551 ic->ic_flags &= ~IEEE80211_F_USEBARKER;
2552 }
2553 ieee80211_notify_erp_locked(ic);
2554 }
2555
2556 /*
2557 * Handle a station leaving an 11g network.
2558 */
2559 static void
2560 ieee80211_node_leave_11g(struct ieee80211_node *ni)
2561 {
2562 struct ieee80211com *ic = ni->ni_ic;
2563
2564 IEEE80211_LOCK_ASSERT(ic);
2565
2566 KASSERT(IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan),
2567 ("not in 11g, bss %u:0x%x", ic->ic_bsschan->ic_freq,
2568 ic->ic_bsschan->ic_flags));
2569
2570 /*
2571 * If a long slot station do the slot time bookkeeping.
2572 */
2573 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) {
2574 KASSERT(ic->ic_longslotsta > 0,
2575 ("bogus long slot station count %d", ic->ic_longslotsta));
2576 ic->ic_longslotsta--;
2577 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2578 "long slot time station leaves, count now %d",
2579 ic->ic_longslotsta);
2580 if (ic->ic_longslotsta == 0) {
2581 /*
2582 * Re-enable use of short slot time if supported
2583 * and not operating in IBSS mode (per spec).
2584 */
2585 if ((ic->ic_caps & IEEE80211_C_SHSLOT) &&
2586 ic->ic_opmode != IEEE80211_M_IBSS) {
2587 IEEE80211_DPRINTF(ni->ni_vap,
2588 IEEE80211_MSG_ASSOC,
2589 "%s: re-enable use of short slot time\n",
2590 __func__);
2591 ieee80211_set_shortslottime(ic, 1);
2592 }
2593 }
2594 }
2595 /*
2596 * If a non-ERP station do the protection-related bookkeeping.
2597 */
2598 if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) {
2599 KASSERT(ic->ic_nonerpsta > 0,
2600 ("bogus non-ERP station count %d", ic->ic_nonerpsta));
2601 ic->ic_nonerpsta--;
2602 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2603 "non-ERP station leaves, count now %d%s", ic->ic_nonerpsta,
2604 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) ?
2605 " (non-ERP sta present)" : "");
2606 if (ic->ic_nonerpsta == 0 &&
2607 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) {
2608 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC,
2609 "%s: disable use of protection\n", __func__);
2610 disable_protection(ic);
2611 }
2612 }
2613 }
2614
2615 /*
2616 * Time out presence of an overlapping bss with non-ERP
2617 * stations. When operating in hostap mode we listen for
2618 * beacons from other stations and if we identify a non-ERP
2619 * station is present we enable protection. To identify
2620 * when all non-ERP stations are gone we time out this
2621 * condition.
2622 */
2623 static void
2624 ieee80211_erp_timeout(struct ieee80211com *ic)
2625 {
2626
2627 IEEE80211_LOCK_ASSERT(ic);
2628
2629 if ((ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) &&
2630 time_after(ticks, ic->ic_lastnonerp + IEEE80211_NONERP_PRESENT_AGE)) {
2631 #if 0
2632 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni,
2633 "%s", "age out non-ERP sta present on channel");
2634 #endif
2635 ic->ic_flags_ext &= ~IEEE80211_FEXT_NONERP_PR;
2636 if (ic->ic_nonerpsta == 0)
2637 disable_protection(ic);
2638 }
2639 }
2640
2641 /*
2642 * Handle bookkeeping for station deauthentication/disassociation
2643 * when operating as an ap.
2644 */
2645 void
2646 ieee80211_node_leave(struct ieee80211_node *ni)
2647 {
2648 struct ieee80211com *ic = ni->ni_ic;
2649 struct ieee80211vap *vap = ni->ni_vap;
2650 struct ieee80211_node_table *nt = ni->ni_table;
2651
2652 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni,
2653 "station with aid %d leaves", IEEE80211_NODE_AID(ni));
2654
2655 KASSERT(vap->iv_opmode != IEEE80211_M_STA,
2656 ("unexpected operating mode %u", vap->iv_opmode));
2657 /*
2658 * If node wasn't previously associated all
2659 * we need to do is reclaim the reference.
2660 */
2661 /* XXX ibss mode bypasses 11g and notification */
2662 if (ni->ni_associd == 0)
2663 goto done;
2664 /*
2665 * Tell the authenticator the station is leaving.
2666 * Note that we must do this before yanking the
2667 * association id as the authenticator uses the
2668 * associd to locate it's state block.
2669 */
2670 if (vap->iv_auth->ia_node_leave != NULL)
2671 vap->iv_auth->ia_node_leave(ni);
2672
2673 IEEE80211_LOCK(ic);
2674 IEEE80211_AID_CLR(vap, ni->ni_associd);
2675 ni->ni_associd = 0;
2676 vap->iv_sta_assoc--;
2677 ic->ic_sta_assoc--;
2678
2679 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan))
2680 ieee80211_ht_node_leave(ni);
2681 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) &&
2682 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan))
2683 ieee80211_node_leave_11g(ni);
2684 IEEE80211_UNLOCK(ic);
2685 /*
2686 * Cleanup station state. In particular clear various
2687 * state that might otherwise be reused if the node
2688 * is reused before the reference count goes to zero
2689 * (and memory is reclaimed).
2690 */
2691 ieee80211_sta_leave(ni);
2692 done:
2693 /*
2694 * Remove the node from any table it's recorded in and
2695 * drop the caller's reference. Removal from the table
2696 * is important to insure the node is not reprocessed
2697 * for inactivity.
2698 */
2699 if (nt != NULL) {
2700 IEEE80211_NODE_LOCK(nt);
2701 node_reclaim(nt, ni);
2702 IEEE80211_NODE_UNLOCK(nt);
2703 } else
2704 ieee80211_free_node(ni);
2705 }
2706
2707 struct rssiinfo {
2708 struct ieee80211vap *vap;
2709 int rssi_samples;
2710 uint32_t rssi_total;
2711 };
2712
2713 static void
2714 get_hostap_rssi(void *arg, struct ieee80211_node *ni)
2715 {
2716 struct rssiinfo *info = arg;
2717 struct ieee80211vap *vap = ni->ni_vap;
2718 int8_t rssi;
2719
2720 if (info->vap != vap)
2721 return;
2722 /* only associated stations */
2723 if (ni->ni_associd == 0)
2724 return;
2725 rssi = vap->iv_ic->ic_node_getrssi(ni);
2726 if (rssi != 0) {
2727 info->rssi_samples++;
2728 info->rssi_total += rssi;
2729 }
2730 }
2731
2732 static void
2733 get_adhoc_rssi(void *arg, struct ieee80211_node *ni)
2734 {
2735 struct rssiinfo *info = arg;
2736 struct ieee80211vap *vap = ni->ni_vap;
2737 int8_t rssi;
2738
2739 if (info->vap != vap)
2740 return;
2741 /* only neighbors */
2742 /* XXX check bssid */
2743 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0)
2744 return;
2745 rssi = vap->iv_ic->ic_node_getrssi(ni);
2746 if (rssi != 0) {
2747 info->rssi_samples++;
2748 info->rssi_total += rssi;
2749 }
2750 }
2751
2752 #ifdef IEEE80211_SUPPORT_MESH
2753 static void
2754 get_mesh_rssi(void *arg, struct ieee80211_node *ni)
2755 {
2756 struct rssiinfo *info = arg;
2757 struct ieee80211vap *vap = ni->ni_vap;
2758 int8_t rssi;
2759
2760 if (info->vap != vap)
2761 return;
2762 /* only neighbors that peered successfully */
2763 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED)
2764 return;
2765 rssi = vap->iv_ic->ic_node_getrssi(ni);
2766 if (rssi != 0) {
2767 info->rssi_samples++;
2768 info->rssi_total += rssi;
2769 }
2770 }
2771 #endif /* IEEE80211_SUPPORT_MESH */
2772
2773 int8_t
2774 ieee80211_getrssi(struct ieee80211vap *vap)
2775 {
2776 #define NZ(x) ((x) == 0 ? 1 : (x))
2777 struct ieee80211com *ic = vap->iv_ic;
2778 struct rssiinfo info;
2779
2780 info.rssi_total = 0;
2781 info.rssi_samples = 0;
2782 info.vap = vap;
2783 switch (vap->iv_opmode) {
2784 case IEEE80211_M_IBSS: /* average of all ibss neighbors */
2785 case IEEE80211_M_AHDEMO: /* average of all neighbors */
2786 ieee80211_iterate_nodes(&ic->ic_sta, get_adhoc_rssi, &info);
2787 break;
2788 case IEEE80211_M_HOSTAP: /* average of all associated stations */
2789 ieee80211_iterate_nodes(&ic->ic_sta, get_hostap_rssi, &info);
2790 break;
2791 #ifdef IEEE80211_SUPPORT_MESH
2792 case IEEE80211_M_MBSS: /* average of all mesh neighbors */
2793 ieee80211_iterate_nodes(&ic->ic_sta, get_mesh_rssi, &info);
2794 break;
2795 #endif
2796 case IEEE80211_M_MONITOR: /* XXX */
2797 case IEEE80211_M_STA: /* use stats from associated ap */
2798 default:
2799 if (vap->iv_bss != NULL)
2800 info.rssi_total = ic->ic_node_getrssi(vap->iv_bss);
2801 info.rssi_samples = 1;
2802 break;
2803 }
2804 return info.rssi_total / NZ(info.rssi_samples);
2805 #undef NZ
2806 }
2807
2808 void
2809 ieee80211_getsignal(struct ieee80211vap *vap, int8_t *rssi, int8_t *noise)
2810 {
2811
2812 if (vap->iv_bss == NULL) /* NB: shouldn't happen */
2813 return;
2814 vap->iv_ic->ic_node_getsignal(vap->iv_bss, rssi, noise);
2815 /* for non-station mode return avg'd rssi accounting */
2816 if (vap->iv_opmode != IEEE80211_M_STA)
2817 *rssi = ieee80211_getrssi(vap);
2818 }
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