1 /*-
2 * Copyright (c) 2001 Atsushi Onoe
3 * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD: releng/11.0/sys/net80211/ieee80211_node.c 302018 2016-06-19 07:31:02Z adrian $");
29
30 #include "opt_wlan.h"
31
32 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/mbuf.h>
35 #include <sys/malloc.h>
36 #include <sys/kernel.h>
37
38 #include <sys/socket.h>
39
40 #include <net/if.h>
41 #include <net/if_var.h>
42 #include <net/if_media.h>
43 #include <net/ethernet.h>
44
45 #include <net80211/ieee80211_var.h>
46 #include <net80211/ieee80211_input.h>
47 #ifdef IEEE80211_SUPPORT_SUPERG
48 #include <net80211/ieee80211_superg.h>
49 #endif
50 #ifdef IEEE80211_SUPPORT_TDMA
51 #include <net80211/ieee80211_tdma.h>
52 #endif
53 #include <net80211/ieee80211_wds.h>
54 #include <net80211/ieee80211_mesh.h>
55 #include <net80211/ieee80211_ratectl.h>
56
57 #include <net/bpf.h>
58
59 /*
60 * IEEE80211_NODE_HASHSIZE must be a power of 2.
61 */
62 CTASSERT((IEEE80211_NODE_HASHSIZE & (IEEE80211_NODE_HASHSIZE-1)) == 0);
63
64 /*
65 * Association id's are managed with a bit vector.
66 */
67 #define IEEE80211_AID_SET(_vap, b) \
68 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] |= \
69 (1 << (IEEE80211_AID(b) % 32)))
70 #define IEEE80211_AID_CLR(_vap, b) \
71 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] &= \
72 ~(1 << (IEEE80211_AID(b) % 32)))
73 #define IEEE80211_AID_ISSET(_vap, b) \
74 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] & (1 << (IEEE80211_AID(b) % 32)))
75
76 static int ieee80211_sta_join1(struct ieee80211_node *);
77
78 static struct ieee80211_node *node_alloc(struct ieee80211vap *,
79 const uint8_t [IEEE80211_ADDR_LEN]);
80 static void node_cleanup(struct ieee80211_node *);
81 static void node_free(struct ieee80211_node *);
82 static void node_age(struct ieee80211_node *);
83 static int8_t node_getrssi(const struct ieee80211_node *);
84 static void node_getsignal(const struct ieee80211_node *, int8_t *, int8_t *);
85 static void node_getmimoinfo(const struct ieee80211_node *,
86 struct ieee80211_mimo_info *);
87
88 static void _ieee80211_free_node(struct ieee80211_node *);
89
90 static void node_reclaim(struct ieee80211_node_table *nt,
91 struct ieee80211_node *ni);
92 static void ieee80211_node_table_init(struct ieee80211com *ic,
93 struct ieee80211_node_table *nt, const char *name,
94 int inact, int keymaxix);
95 static void ieee80211_node_table_reset(struct ieee80211_node_table *,
96 struct ieee80211vap *);
97 static void ieee80211_node_table_cleanup(struct ieee80211_node_table *nt);
98 static void ieee80211_erp_timeout(struct ieee80211com *);
99
100 MALLOC_DEFINE(M_80211_NODE, "80211node", "802.11 node state");
101 MALLOC_DEFINE(M_80211_NODE_IE, "80211nodeie", "802.11 node ie");
102
103 void
104 ieee80211_node_attach(struct ieee80211com *ic)
105 {
106 /* XXX really want maxlen enforced per-sta */
107 ieee80211_ageq_init(&ic->ic_stageq, ic->ic_max_keyix * 8,
108 "802.11 staging q");
109 ieee80211_node_table_init(ic, &ic->ic_sta, "station",
110 IEEE80211_INACT_INIT, ic->ic_max_keyix);
111 callout_init(&ic->ic_inact, 1);
112 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz,
113 ieee80211_node_timeout, ic);
114
115 ic->ic_node_alloc = node_alloc;
116 ic->ic_node_free = node_free;
117 ic->ic_node_cleanup = node_cleanup;
118 ic->ic_node_age = node_age;
119 ic->ic_node_drain = node_age; /* NB: same as age */
120 ic->ic_node_getrssi = node_getrssi;
121 ic->ic_node_getsignal = node_getsignal;
122 ic->ic_node_getmimoinfo = node_getmimoinfo;
123
124 /*
125 * Set flags to be propagated to all vap's;
126 * these define default behaviour/configuration.
127 */
128 ic->ic_flags_ext |= IEEE80211_FEXT_INACT; /* inactivity processing */
129 }
130
131 void
132 ieee80211_node_detach(struct ieee80211com *ic)
133 {
134
135 callout_drain(&ic->ic_inact);
136 ieee80211_node_table_cleanup(&ic->ic_sta);
137 ieee80211_ageq_cleanup(&ic->ic_stageq);
138 }
139
140 void
141 ieee80211_node_vattach(struct ieee80211vap *vap)
142 {
143 /* NB: driver can override */
144 vap->iv_max_aid = IEEE80211_AID_DEF;
145
146 /* default station inactivity timer setings */
147 vap->iv_inact_init = IEEE80211_INACT_INIT;
148 vap->iv_inact_auth = IEEE80211_INACT_AUTH;
149 vap->iv_inact_run = IEEE80211_INACT_RUN;
150 vap->iv_inact_probe = IEEE80211_INACT_PROBE;
151
152 IEEE80211_DPRINTF(vap, IEEE80211_MSG_INACT,
153 "%s: init %u auth %u run %u probe %u\n", __func__,
154 vap->iv_inact_init, vap->iv_inact_auth,
155 vap->iv_inact_run, vap->iv_inact_probe);
156 }
157
158 void
159 ieee80211_node_latevattach(struct ieee80211vap *vap)
160 {
161 if (vap->iv_opmode == IEEE80211_M_HOSTAP) {
162 /* XXX should we allow max aid to be zero? */
163 if (vap->iv_max_aid < IEEE80211_AID_MIN) {
164 vap->iv_max_aid = IEEE80211_AID_MIN;
165 if_printf(vap->iv_ifp,
166 "WARNING: max aid too small, changed to %d\n",
167 vap->iv_max_aid);
168 }
169 vap->iv_aid_bitmap = (uint32_t *) IEEE80211_MALLOC(
170 howmany(vap->iv_max_aid, 32) * sizeof(uint32_t),
171 M_80211_NODE,
172 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
173 if (vap->iv_aid_bitmap == NULL) {
174 /* XXX no way to recover */
175 printf("%s: no memory for AID bitmap, max aid %d!\n",
176 __func__, vap->iv_max_aid);
177 vap->iv_max_aid = 0;
178 }
179 }
180
181 ieee80211_reset_bss(vap);
182
183 vap->iv_auth = ieee80211_authenticator_get(vap->iv_bss->ni_authmode);
184 }
185
186 void
187 ieee80211_node_vdetach(struct ieee80211vap *vap)
188 {
189 struct ieee80211com *ic = vap->iv_ic;
190
191 ieee80211_node_table_reset(&ic->ic_sta, vap);
192 if (vap->iv_bss != NULL) {
193 ieee80211_free_node(vap->iv_bss);
194 vap->iv_bss = NULL;
195 }
196 if (vap->iv_aid_bitmap != NULL) {
197 IEEE80211_FREE(vap->iv_aid_bitmap, M_80211_NODE);
198 vap->iv_aid_bitmap = NULL;
199 }
200 }
201
202 /*
203 * Port authorize/unauthorize interfaces for use by an authenticator.
204 */
205
206 void
207 ieee80211_node_authorize(struct ieee80211_node *ni)
208 {
209 struct ieee80211vap *vap = ni->ni_vap;
210
211 ni->ni_flags |= IEEE80211_NODE_AUTH;
212 ni->ni_inact_reload = vap->iv_inact_run;
213 ni->ni_inact = ni->ni_inact_reload;
214
215 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni,
216 "%s: inact_reload %u", __func__, ni->ni_inact_reload);
217 }
218
219 void
220 ieee80211_node_unauthorize(struct ieee80211_node *ni)
221 {
222 struct ieee80211vap *vap = ni->ni_vap;
223
224 ni->ni_flags &= ~IEEE80211_NODE_AUTH;
225 ni->ni_inact_reload = vap->iv_inact_auth;
226 if (ni->ni_inact > ni->ni_inact_reload)
227 ni->ni_inact = ni->ni_inact_reload;
228
229 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni,
230 "%s: inact_reload %u inact %u", __func__,
231 ni->ni_inact_reload, ni->ni_inact);
232 }
233
234 /*
235 * Fix tx parameters for a node according to ``association state''.
236 */
237 void
238 ieee80211_node_setuptxparms(struct ieee80211_node *ni)
239 {
240 struct ieee80211vap *vap = ni->ni_vap;
241 enum ieee80211_phymode mode;
242
243 if (ni->ni_flags & IEEE80211_NODE_HT) {
244 if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan))
245 mode = IEEE80211_MODE_11NA;
246 else
247 mode = IEEE80211_MODE_11NG;
248 } else { /* legacy rate handling */
249 if (IEEE80211_IS_CHAN_ST(ni->ni_chan))
250 mode = IEEE80211_MODE_STURBO_A;
251 else if (IEEE80211_IS_CHAN_HALF(ni->ni_chan))
252 mode = IEEE80211_MODE_HALF;
253 else if (IEEE80211_IS_CHAN_QUARTER(ni->ni_chan))
254 mode = IEEE80211_MODE_QUARTER;
255 /* NB: 108A should be handled as 11a */
256 else if (IEEE80211_IS_CHAN_A(ni->ni_chan))
257 mode = IEEE80211_MODE_11A;
258 else if (IEEE80211_IS_CHAN_108G(ni->ni_chan) ||
259 (ni->ni_flags & IEEE80211_NODE_ERP))
260 mode = IEEE80211_MODE_11G;
261 else
262 mode = IEEE80211_MODE_11B;
263 }
264 ni->ni_txparms = &vap->iv_txparms[mode];
265 }
266
267 /*
268 * Set/change the channel. The rate set is also updated as
269 * to insure a consistent view by drivers.
270 * XXX should be private but hostap needs it to deal with CSA
271 */
272 void
273 ieee80211_node_set_chan(struct ieee80211_node *ni,
274 struct ieee80211_channel *chan)
275 {
276 struct ieee80211com *ic = ni->ni_ic;
277 struct ieee80211vap *vap = ni->ni_vap;
278 enum ieee80211_phymode mode;
279
280 KASSERT(chan != IEEE80211_CHAN_ANYC, ("no channel"));
281
282 ni->ni_chan = chan;
283 mode = ieee80211_chan2mode(chan);
284 if (IEEE80211_IS_CHAN_HT(chan)) {
285 /*
286 * We must install the legacy rate est in ni_rates and the
287 * HT rate set in ni_htrates.
288 */
289 ni->ni_htrates = *ieee80211_get_suphtrates(ic, chan);
290 /*
291 * Setup bss tx parameters based on operating mode. We
292 * use legacy rates when operating in a mixed HT+non-HT bss
293 * and non-ERP rates in 11g for mixed ERP+non-ERP bss.
294 */
295 if (mode == IEEE80211_MODE_11NA &&
296 (vap->iv_flags_ht & IEEE80211_FHT_PUREN) == 0)
297 mode = IEEE80211_MODE_11A;
298 else if (mode == IEEE80211_MODE_11NG &&
299 (vap->iv_flags_ht & IEEE80211_FHT_PUREN) == 0)
300 mode = IEEE80211_MODE_11G;
301 if (mode == IEEE80211_MODE_11G &&
302 (vap->iv_flags & IEEE80211_F_PUREG) == 0)
303 mode = IEEE80211_MODE_11B;
304 }
305 ni->ni_txparms = &vap->iv_txparms[mode];
306 ni->ni_rates = *ieee80211_get_suprates(ic, chan);
307 }
308
309 static __inline void
310 copy_bss(struct ieee80211_node *nbss, const struct ieee80211_node *obss)
311 {
312 /* propagate useful state */
313 nbss->ni_authmode = obss->ni_authmode;
314 nbss->ni_txpower = obss->ni_txpower;
315 nbss->ni_vlan = obss->ni_vlan;
316 /* XXX statistics? */
317 /* XXX legacy WDS bssid? */
318 }
319
320 void
321 ieee80211_create_ibss(struct ieee80211vap* vap, struct ieee80211_channel *chan)
322 {
323 struct ieee80211com *ic = vap->iv_ic;
324 struct ieee80211_node *ni;
325
326 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN,
327 "%s: creating %s on channel %u%c\n", __func__,
328 ieee80211_opmode_name[vap->iv_opmode],
329 ieee80211_chan2ieee(ic, chan),
330 ieee80211_channel_type_char(chan));
331
332 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr);
333 if (ni == NULL) {
334 /* XXX recovery? */
335 return;
336 }
337 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr);
338 ni->ni_esslen = vap->iv_des_ssid[0].len;
339 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen);
340 if (vap->iv_bss != NULL)
341 copy_bss(ni, vap->iv_bss);
342 ni->ni_intval = ic->ic_bintval;
343 if (vap->iv_flags & IEEE80211_F_PRIVACY)
344 ni->ni_capinfo |= IEEE80211_CAPINFO_PRIVACY;
345 if (ic->ic_phytype == IEEE80211_T_FH) {
346 ni->ni_fhdwell = 200; /* XXX */
347 ni->ni_fhindex = 1;
348 }
349 if (vap->iv_opmode == IEEE80211_M_IBSS) {
350 vap->iv_flags |= IEEE80211_F_SIBSS;
351 ni->ni_capinfo |= IEEE80211_CAPINFO_IBSS; /* XXX */
352 if (vap->iv_flags & IEEE80211_F_DESBSSID)
353 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid);
354 else {
355 get_random_bytes(ni->ni_bssid, IEEE80211_ADDR_LEN);
356 /* clear group bit, add local bit */
357 ni->ni_bssid[0] = (ni->ni_bssid[0] &~ 0x01) | 0x02;
358 }
359 } else if (vap->iv_opmode == IEEE80211_M_AHDEMO) {
360 if (vap->iv_flags & IEEE80211_F_DESBSSID)
361 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid);
362 else
363 #ifdef IEEE80211_SUPPORT_TDMA
364 if ((vap->iv_caps & IEEE80211_C_TDMA) == 0)
365 #endif
366 memset(ni->ni_bssid, 0, IEEE80211_ADDR_LEN);
367 #ifdef IEEE80211_SUPPORT_MESH
368 } else if (vap->iv_opmode == IEEE80211_M_MBSS) {
369 ni->ni_meshidlen = vap->iv_mesh->ms_idlen;
370 memcpy(ni->ni_meshid, vap->iv_mesh->ms_id, ni->ni_meshidlen);
371 #endif
372 }
373 /*
374 * Fix the channel and related attributes.
375 */
376 /* clear DFS CAC state on previous channel */
377 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC &&
378 ic->ic_bsschan->ic_freq != chan->ic_freq &&
379 IEEE80211_IS_CHAN_CACDONE(ic->ic_bsschan))
380 ieee80211_dfs_cac_clear(ic, ic->ic_bsschan);
381 ic->ic_bsschan = chan;
382 ieee80211_node_set_chan(ni, chan);
383 ic->ic_curmode = ieee80211_chan2mode(chan);
384 /*
385 * Do mode-specific setup.
386 */
387 if (IEEE80211_IS_CHAN_FULL(chan)) {
388 if (IEEE80211_IS_CHAN_ANYG(chan)) {
389 /*
390 * Use a mixed 11b/11g basic rate set.
391 */
392 ieee80211_setbasicrates(&ni->ni_rates,
393 IEEE80211_MODE_11G);
394 if (vap->iv_flags & IEEE80211_F_PUREG) {
395 /*
396 * Also mark OFDM rates basic so 11b
397 * stations do not join (WiFi compliance).
398 */
399 ieee80211_addbasicrates(&ni->ni_rates,
400 IEEE80211_MODE_11A);
401 }
402 } else if (IEEE80211_IS_CHAN_B(chan)) {
403 /*
404 * Force pure 11b rate set.
405 */
406 ieee80211_setbasicrates(&ni->ni_rates,
407 IEEE80211_MODE_11B);
408 }
409 }
410
411 (void) ieee80211_sta_join1(ieee80211_ref_node(ni));
412 }
413
414 /*
415 * Reset bss state on transition to the INIT state.
416 * Clear any stations from the table (they have been
417 * deauth'd) and reset the bss node (clears key, rate
418 * etc. state).
419 */
420 void
421 ieee80211_reset_bss(struct ieee80211vap *vap)
422 {
423 struct ieee80211com *ic = vap->iv_ic;
424 struct ieee80211_node *ni, *obss;
425
426 ieee80211_node_table_reset(&ic->ic_sta, vap);
427 /* XXX multi-bss: wrong */
428 ieee80211_reset_erp(ic);
429
430 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr);
431 KASSERT(ni != NULL, ("unable to setup initial BSS node"));
432 obss = vap->iv_bss;
433 vap->iv_bss = ieee80211_ref_node(ni);
434 if (obss != NULL) {
435 copy_bss(ni, obss);
436 ni->ni_intval = ic->ic_bintval;
437 ieee80211_free_node(obss);
438 } else
439 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr);
440 }
441
442 static int
443 match_ssid(const struct ieee80211_node *ni,
444 int nssid, const struct ieee80211_scan_ssid ssids[])
445 {
446 int i;
447
448 for (i = 0; i < nssid; i++) {
449 if (ni->ni_esslen == ssids[i].len &&
450 memcmp(ni->ni_essid, ssids[i].ssid, ni->ni_esslen) == 0)
451 return 1;
452 }
453 return 0;
454 }
455
456 /*
457 * Test a node for suitability/compatibility.
458 */
459 static int
460 check_bss(struct ieee80211vap *vap, struct ieee80211_node *ni)
461 {
462 struct ieee80211com *ic = ni->ni_ic;
463 uint8_t rate;
464
465 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan)))
466 return 0;
467 if (vap->iv_opmode == IEEE80211_M_IBSS) {
468 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0)
469 return 0;
470 } else {
471 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0)
472 return 0;
473 }
474 if (vap->iv_flags & IEEE80211_F_PRIVACY) {
475 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0)
476 return 0;
477 } else {
478 /* XXX does this mean privacy is supported or required? */
479 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY)
480 return 0;
481 }
482 rate = ieee80211_fix_rate(ni, &ni->ni_rates,
483 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE);
484 if (rate & IEEE80211_RATE_BASIC)
485 return 0;
486 if (vap->iv_des_nssid != 0 &&
487 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid))
488 return 0;
489 if ((vap->iv_flags & IEEE80211_F_DESBSSID) &&
490 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid))
491 return 0;
492 return 1;
493 }
494
495 #ifdef IEEE80211_DEBUG
496 /*
497 * Display node suitability/compatibility.
498 */
499 static void
500 check_bss_debug(struct ieee80211vap *vap, struct ieee80211_node *ni)
501 {
502 struct ieee80211com *ic = ni->ni_ic;
503 uint8_t rate;
504 int fail;
505
506 fail = 0;
507 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan)))
508 fail |= 0x01;
509 if (vap->iv_opmode == IEEE80211_M_IBSS) {
510 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0)
511 fail |= 0x02;
512 } else {
513 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0)
514 fail |= 0x02;
515 }
516 if (vap->iv_flags & IEEE80211_F_PRIVACY) {
517 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0)
518 fail |= 0x04;
519 } else {
520 /* XXX does this mean privacy is supported or required? */
521 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY)
522 fail |= 0x04;
523 }
524 rate = ieee80211_fix_rate(ni, &ni->ni_rates,
525 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE);
526 if (rate & IEEE80211_RATE_BASIC)
527 fail |= 0x08;
528 if (vap->iv_des_nssid != 0 &&
529 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid))
530 fail |= 0x10;
531 if ((vap->iv_flags & IEEE80211_F_DESBSSID) &&
532 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid))
533 fail |= 0x20;
534
535 printf(" %c %s", fail ? '-' : '+', ether_sprintf(ni->ni_macaddr));
536 printf(" %s%c", ether_sprintf(ni->ni_bssid), fail & 0x20 ? '!' : ' ');
537 printf(" %3d%c",
538 ieee80211_chan2ieee(ic, ni->ni_chan), fail & 0x01 ? '!' : ' ');
539 printf(" %2dM%c", (rate & IEEE80211_RATE_VAL) / 2,
540 fail & 0x08 ? '!' : ' ');
541 printf(" %4s%c",
542 (ni->ni_capinfo & IEEE80211_CAPINFO_ESS) ? "ess" :
543 (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) ? "ibss" :
544 "????",
545 fail & 0x02 ? '!' : ' ');
546 printf(" %3s%c ",
547 (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) ? "wep" : "no",
548 fail & 0x04 ? '!' : ' ');
549 ieee80211_print_essid(ni->ni_essid, ni->ni_esslen);
550 printf("%s\n", fail & 0x10 ? "!" : "");
551 }
552 #endif /* IEEE80211_DEBUG */
553
554
555 int
556 ieee80211_ibss_merge_check(struct ieee80211_node *ni)
557 {
558 struct ieee80211vap *vap = ni->ni_vap;
559
560 if (ni == vap->iv_bss ||
561 IEEE80211_ADDR_EQ(ni->ni_bssid, vap->iv_bss->ni_bssid)) {
562 /* unchanged, nothing to do */
563 return 0;
564 }
565
566 if (!check_bss(vap, ni)) {
567 /* capabilities mismatch */
568 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC,
569 "%s: merge failed, capabilities mismatch\n", __func__);
570 #ifdef IEEE80211_DEBUG
571 if (ieee80211_msg_assoc(vap))
572 check_bss_debug(vap, ni);
573 #endif
574 vap->iv_stats.is_ibss_capmismatch++;
575 return 0;
576 }
577
578 return 1;
579 }
580
581 /*
582 * Handle 802.11 ad hoc network merge. The
583 * convention, set by the Wireless Ethernet Compatibility Alliance
584 * (WECA), is that an 802.11 station will change its BSSID to match
585 * the "oldest" 802.11 ad hoc network, on the same channel, that
586 * has the station's desired SSID. The "oldest" 802.11 network
587 * sends beacons with the greatest TSF timestamp.
588 *
589 * The caller is assumed to validate TSF's before attempting a merge.
590 *
591 * Return !0 if the BSSID changed, 0 otherwise.
592 */
593 int
594 ieee80211_ibss_merge(struct ieee80211_node *ni)
595 {
596 #ifdef IEEE80211_DEBUG
597 struct ieee80211vap *vap = ni->ni_vap;
598 struct ieee80211com *ic = ni->ni_ic;
599 #endif
600
601 if (! ieee80211_ibss_merge_check(ni))
602 return 0;
603
604 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC,
605 "%s: new bssid %s: %s preamble, %s slot time%s\n", __func__,
606 ether_sprintf(ni->ni_bssid),
607 ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long",
608 ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long",
609 ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : ""
610 );
611 return ieee80211_sta_join1(ieee80211_ref_node(ni));
612 }
613
614 /*
615 * Calculate HT channel promotion flags for all vaps.
616 * This assumes ni_chan have been setup for each vap.
617 */
618 static int
619 gethtadjustflags(struct ieee80211com *ic)
620 {
621 struct ieee80211vap *vap;
622 int flags;
623
624 flags = 0;
625 /* XXX locking */
626 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
627 if (vap->iv_state < IEEE80211_S_RUN)
628 continue;
629 switch (vap->iv_opmode) {
630 case IEEE80211_M_WDS:
631 case IEEE80211_M_STA:
632 case IEEE80211_M_AHDEMO:
633 case IEEE80211_M_HOSTAP:
634 case IEEE80211_M_IBSS:
635 case IEEE80211_M_MBSS:
636 flags |= ieee80211_htchanflags(vap->iv_bss->ni_chan);
637 break;
638 default:
639 break;
640 }
641 }
642 return flags;
643 }
644
645 /*
646 * Check if the current channel needs to change based on whether
647 * any vap's are using HT20/HT40. This is used to sync the state
648 * of ic_curchan after a channel width change on a running vap.
649 */
650 void
651 ieee80211_sync_curchan(struct ieee80211com *ic)
652 {
653 struct ieee80211_channel *c;
654
655 c = ieee80211_ht_adjust_channel(ic, ic->ic_curchan, gethtadjustflags(ic));
656 if (c != ic->ic_curchan) {
657 ic->ic_curchan = c;
658 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan);
659 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan);
660 IEEE80211_UNLOCK(ic);
661 ic->ic_set_channel(ic);
662 ieee80211_radiotap_chan_change(ic);
663 IEEE80211_LOCK(ic);
664 }
665 }
666
667 /*
668 * Setup the current channel. The request channel may be
669 * promoted if other vap's are operating with HT20/HT40.
670 */
671 void
672 ieee80211_setupcurchan(struct ieee80211com *ic, struct ieee80211_channel *c)
673 {
674 if (ic->ic_htcaps & IEEE80211_HTC_HT) {
675 int flags = gethtadjustflags(ic);
676 /*
677 * Check for channel promotion required to support the
678 * set of running vap's. This assumes we are called
679 * after ni_chan is setup for each vap.
680 */
681 /* NB: this assumes IEEE80211_FHT_USEHT40 > IEEE80211_FHT_HT */
682 if (flags > ieee80211_htchanflags(c))
683 c = ieee80211_ht_adjust_channel(ic, c, flags);
684 }
685 ic->ic_bsschan = ic->ic_curchan = c;
686 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan);
687 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan);
688 }
689
690 /*
691 * Change the current channel. The channel change is guaranteed to have
692 * happened before the next state change.
693 */
694 void
695 ieee80211_setcurchan(struct ieee80211com *ic, struct ieee80211_channel *c)
696 {
697 ieee80211_setupcurchan(ic, c);
698 ieee80211_runtask(ic, &ic->ic_chan_task);
699 }
700
701 void
702 ieee80211_update_chw(struct ieee80211com *ic)
703 {
704
705 ieee80211_setupcurchan(ic, ic->ic_curchan);
706 ieee80211_runtask(ic, &ic->ic_chw_task);
707 }
708
709 /*
710 * Join the specified IBSS/BSS network. The node is assumed to
711 * be passed in with a held reference.
712 */
713 static int
714 ieee80211_sta_join1(struct ieee80211_node *selbs)
715 {
716 struct ieee80211vap *vap = selbs->ni_vap;
717 struct ieee80211com *ic = selbs->ni_ic;
718 struct ieee80211_node *obss;
719 int canreassoc;
720
721 /*
722 * Committed to selbs, setup state.
723 */
724 obss = vap->iv_bss;
725 /*
726 * Check if old+new node have the same address in which
727 * case we can reassociate when operating in sta mode.
728 */
729 canreassoc = (obss != NULL &&
730 vap->iv_state == IEEE80211_S_RUN &&
731 IEEE80211_ADDR_EQ(obss->ni_macaddr, selbs->ni_macaddr));
732 vap->iv_bss = selbs; /* NB: caller assumed to bump refcnt */
733 if (obss != NULL) {
734 struct ieee80211_node_table *nt = obss->ni_table;
735
736 copy_bss(selbs, obss);
737 ieee80211_node_decref(obss); /* iv_bss reference */
738
739 IEEE80211_NODE_LOCK(nt);
740 node_reclaim(nt, obss); /* station table reference */
741 IEEE80211_NODE_UNLOCK(nt);
742
743 obss = NULL; /* NB: guard against later use */
744 }
745
746 /*
747 * Delete unusable rates; we've already checked
748 * that the negotiated rate set is acceptable.
749 */
750 ieee80211_fix_rate(vap->iv_bss, &vap->iv_bss->ni_rates,
751 IEEE80211_F_DODEL | IEEE80211_F_JOIN);
752
753 ieee80211_setcurchan(ic, selbs->ni_chan);
754 /*
755 * Set the erp state (mostly the slot time) to deal with
756 * the auto-select case; this should be redundant if the
757 * mode is locked.
758 */
759 ieee80211_reset_erp(ic);
760 ieee80211_wme_initparams(vap);
761
762 if (vap->iv_opmode == IEEE80211_M_STA) {
763 if (canreassoc) {
764 /* Reassociate */
765 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 1);
766 } else {
767 /*
768 * Act as if we received a DEAUTH frame in case we
769 * are invoked from the RUN state. This will cause
770 * us to try to re-authenticate if we are operating
771 * as a station.
772 */
773 ieee80211_new_state(vap, IEEE80211_S_AUTH,
774 IEEE80211_FC0_SUBTYPE_DEAUTH);
775 }
776 } else
777 ieee80211_new_state(vap, IEEE80211_S_RUN, -1);
778 return 1;
779 }
780
781 int
782 ieee80211_sta_join(struct ieee80211vap *vap, struct ieee80211_channel *chan,
783 const struct ieee80211_scan_entry *se)
784 {
785 struct ieee80211com *ic = vap->iv_ic;
786 struct ieee80211_node *ni;
787
788 ni = ieee80211_alloc_node(&ic->ic_sta, vap, se->se_macaddr);
789 if (ni == NULL) {
790 /* XXX msg */
791 return 0;
792 }
793
794 /*
795 * Expand scan state into node's format.
796 * XXX may not need all this stuff
797 */
798 IEEE80211_ADDR_COPY(ni->ni_bssid, se->se_bssid);
799 ni->ni_esslen = se->se_ssid[1];
800 memcpy(ni->ni_essid, se->se_ssid+2, ni->ni_esslen);
801 ni->ni_tstamp.tsf = se->se_tstamp.tsf;
802 ni->ni_intval = se->se_intval;
803 ni->ni_capinfo = se->se_capinfo;
804 ni->ni_chan = chan;
805 ni->ni_timoff = se->se_timoff;
806 ni->ni_fhdwell = se->se_fhdwell;
807 ni->ni_fhindex = se->se_fhindex;
808 ni->ni_erp = se->se_erp;
809 IEEE80211_RSSI_LPF(ni->ni_avgrssi, se->se_rssi);
810 ni->ni_noise = se->se_noise;
811 if (vap->iv_opmode == IEEE80211_M_STA) {
812 /* NB: only infrastructure mode requires an associd */
813 ni->ni_flags |= IEEE80211_NODE_ASSOCID;
814 }
815
816 if (ieee80211_ies_init(&ni->ni_ies, se->se_ies.data, se->se_ies.len)) {
817 ieee80211_ies_expand(&ni->ni_ies);
818 #ifdef IEEE80211_SUPPORT_SUPERG
819 if (ni->ni_ies.ath_ie != NULL)
820 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie);
821 #endif
822 if (ni->ni_ies.htcap_ie != NULL)
823 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie);
824 if (ni->ni_ies.htinfo_ie != NULL)
825 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie);
826 #ifdef IEEE80211_SUPPORT_MESH
827 if (ni->ni_ies.meshid_ie != NULL)
828 ieee80211_parse_meshid(ni, ni->ni_ies.meshid_ie);
829 #endif
830 #ifdef IEEE80211_SUPPORT_TDMA
831 if (ni->ni_ies.tdma_ie != NULL)
832 ieee80211_parse_tdma(ni, ni->ni_ies.tdma_ie);
833 #endif
834 }
835
836 vap->iv_dtim_period = se->se_dtimperiod;
837 vap->iv_dtim_count = 0;
838
839 /* NB: must be after ni_chan is setup */
840 ieee80211_setup_rates(ni, se->se_rates, se->se_xrates,
841 IEEE80211_F_DOSORT);
842 if (ieee80211_iserp_rateset(&ni->ni_rates))
843 ni->ni_flags |= IEEE80211_NODE_ERP;
844
845 /*
846 * Setup HT state for this node if it's available, otherwise
847 * non-STA modes won't pick this state up.
848 *
849 * For IBSS and related modes that don't go through an
850 * association request/response, the only appropriate place
851 * to setup the HT state is here.
852 */
853 if (ni->ni_ies.htinfo_ie != NULL &&
854 ni->ni_ies.htcap_ie != NULL &&
855 vap->iv_flags_ht & IEEE80211_FHT_HT) {
856 ieee80211_ht_node_init(ni);
857 ieee80211_ht_updateparams(ni,
858 ni->ni_ies.htcap_ie,
859 ni->ni_ies.htinfo_ie);
860 ieee80211_setup_htrates(ni, ni->ni_ies.htcap_ie,
861 IEEE80211_F_JOIN | IEEE80211_F_DOBRS);
862 ieee80211_setup_basic_htrates(ni, ni->ni_ies.htinfo_ie);
863 }
864 /* XXX else check for ath FF? */
865 /* XXX QoS? Difficult given that WME config is specific to a master */
866
867 ieee80211_node_setuptxparms(ni);
868 ieee80211_ratectl_node_init(ni);
869
870 return ieee80211_sta_join1(ieee80211_ref_node(ni));
871 }
872
873 /*
874 * Leave the specified IBSS/BSS network. The node is assumed to
875 * be passed in with a held reference.
876 */
877 void
878 ieee80211_sta_leave(struct ieee80211_node *ni)
879 {
880 struct ieee80211com *ic = ni->ni_ic;
881
882 ic->ic_node_cleanup(ni);
883 ieee80211_notify_node_leave(ni);
884 }
885
886 /*
887 * Send a deauthenticate frame and drop the station.
888 */
889 void
890 ieee80211_node_deauth(struct ieee80211_node *ni, int reason)
891 {
892 /* NB: bump the refcnt to be sure temporary nodes are not reclaimed */
893 ieee80211_ref_node(ni);
894 if (ni->ni_associd != 0)
895 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH, reason);
896 ieee80211_node_leave(ni);
897 ieee80211_free_node(ni);
898 }
899
900 static struct ieee80211_node *
901 node_alloc(struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN])
902 {
903 struct ieee80211_node *ni;
904
905 ni = (struct ieee80211_node *) IEEE80211_MALLOC(sizeof(struct ieee80211_node),
906 M_80211_NODE, IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
907 return ni;
908 }
909
910 /*
911 * Initialize an ie blob with the specified data. If previous
912 * data exists re-use the data block. As a side effect we clear
913 * all references to specific ie's; the caller is required to
914 * recalculate them.
915 */
916 int
917 ieee80211_ies_init(struct ieee80211_ies *ies, const uint8_t *data, int len)
918 {
919 /* NB: assumes data+len are the last fields */
920 memset(ies, 0, offsetof(struct ieee80211_ies, data));
921 if (ies->data != NULL && ies->len != len) {
922 /* data size changed */
923 IEEE80211_FREE(ies->data, M_80211_NODE_IE);
924 ies->data = NULL;
925 }
926 if (ies->data == NULL) {
927 ies->data = (uint8_t *) IEEE80211_MALLOC(len, M_80211_NODE_IE,
928 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
929 if (ies->data == NULL) {
930 ies->len = 0;
931 /* NB: pointers have already been zero'd above */
932 return 0;
933 }
934 }
935 memcpy(ies->data, data, len);
936 ies->len = len;
937 return 1;
938 }
939
940 /*
941 * Reclaim storage for an ie blob.
942 */
943 void
944 ieee80211_ies_cleanup(struct ieee80211_ies *ies)
945 {
946 if (ies->data != NULL)
947 IEEE80211_FREE(ies->data, M_80211_NODE_IE);
948 }
949
950 /*
951 * Expand an ie blob data contents and to fillin individual
952 * ie pointers. The data blob is assumed to be well-formed;
953 * we don't do any validity checking of ie lengths.
954 */
955 void
956 ieee80211_ies_expand(struct ieee80211_ies *ies)
957 {
958 uint8_t *ie;
959 int ielen;
960
961 ie = ies->data;
962 ielen = ies->len;
963 while (ielen > 0) {
964 switch (ie[0]) {
965 case IEEE80211_ELEMID_VENDOR:
966 if (iswpaoui(ie))
967 ies->wpa_ie = ie;
968 else if (iswmeoui(ie))
969 ies->wme_ie = ie;
970 #ifdef IEEE80211_SUPPORT_SUPERG
971 else if (isatherosoui(ie))
972 ies->ath_ie = ie;
973 #endif
974 #ifdef IEEE80211_SUPPORT_TDMA
975 else if (istdmaoui(ie))
976 ies->tdma_ie = ie;
977 #endif
978 break;
979 case IEEE80211_ELEMID_RSN:
980 ies->rsn_ie = ie;
981 break;
982 case IEEE80211_ELEMID_HTCAP:
983 ies->htcap_ie = ie;
984 break;
985 case IEEE80211_ELEMID_HTINFO:
986 ies->htinfo_ie = ie;
987 break;
988 #ifdef IEEE80211_SUPPORT_MESH
989 case IEEE80211_ELEMID_MESHID:
990 ies->meshid_ie = ie;
991 break;
992 #endif
993 }
994 ielen -= 2 + ie[1];
995 ie += 2 + ie[1];
996 }
997 }
998
999 /*
1000 * Reclaim any resources in a node and reset any critical
1001 * state. Typically nodes are free'd immediately after,
1002 * but in some cases the storage may be reused so we need
1003 * to insure consistent state (should probably fix that).
1004 */
1005 static void
1006 node_cleanup(struct ieee80211_node *ni)
1007 {
1008 struct ieee80211vap *vap = ni->ni_vap;
1009 struct ieee80211com *ic = ni->ni_ic;
1010 int i;
1011
1012 /* NB: preserve ni_table */
1013 if (ni->ni_flags & IEEE80211_NODE_PWR_MGT) {
1014 if (vap->iv_opmode != IEEE80211_M_STA)
1015 vap->iv_ps_sta--;
1016 ni->ni_flags &= ~IEEE80211_NODE_PWR_MGT;
1017 IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni,
1018 "power save mode off, %u sta's in ps mode", vap->iv_ps_sta);
1019 }
1020 /*
1021 * Cleanup any HT-related state.
1022 */
1023 if (ni->ni_flags & IEEE80211_NODE_HT)
1024 ieee80211_ht_node_cleanup(ni);
1025 #ifdef IEEE80211_SUPPORT_SUPERG
1026 /* Always do FF node cleanup; for A-MSDU */
1027 ieee80211_ff_node_cleanup(ni);
1028 #endif
1029 #ifdef IEEE80211_SUPPORT_MESH
1030 /*
1031 * Cleanup any mesh-related state.
1032 */
1033 if (vap->iv_opmode == IEEE80211_M_MBSS)
1034 ieee80211_mesh_node_cleanup(ni);
1035 #endif
1036 /*
1037 * Clear any staging queue entries.
1038 */
1039 ieee80211_ageq_drain_node(&ic->ic_stageq, ni);
1040
1041 /*
1042 * Clear AREF flag that marks the authorization refcnt bump
1043 * has happened. This is probably not needed as the node
1044 * should always be removed from the table so not found but
1045 * do it just in case.
1046 * Likewise clear the ASSOCID flag as these flags are intended
1047 * to be managed in tandem.
1048 */
1049 ni->ni_flags &= ~(IEEE80211_NODE_AREF | IEEE80211_NODE_ASSOCID);
1050
1051 /*
1052 * Drain power save queue and, if needed, clear TIM.
1053 */
1054 if (ieee80211_node_psq_drain(ni) != 0 && vap->iv_set_tim != NULL)
1055 vap->iv_set_tim(ni, 0);
1056
1057 ni->ni_associd = 0;
1058 if (ni->ni_challenge != NULL) {
1059 IEEE80211_FREE(ni->ni_challenge, M_80211_NODE);
1060 ni->ni_challenge = NULL;
1061 }
1062 /*
1063 * Preserve SSID, WPA, and WME ie's so the bss node is
1064 * reusable during a re-auth/re-assoc state transition.
1065 * If we remove these data they will not be recreated
1066 * because they come from a probe-response or beacon frame
1067 * which cannot be expected prior to the association-response.
1068 * This should not be an issue when operating in other modes
1069 * as stations leaving always go through a full state transition
1070 * which will rebuild this state.
1071 *
1072 * XXX does this leave us open to inheriting old state?
1073 */
1074 for (i = 0; i < nitems(ni->ni_rxfrag); i++)
1075 if (ni->ni_rxfrag[i] != NULL) {
1076 m_freem(ni->ni_rxfrag[i]);
1077 ni->ni_rxfrag[i] = NULL;
1078 }
1079 /*
1080 * Must be careful here to remove any key map entry w/o a LOR.
1081 */
1082 ieee80211_node_delucastkey(ni);
1083 }
1084
1085 static void
1086 node_free(struct ieee80211_node *ni)
1087 {
1088 struct ieee80211com *ic = ni->ni_ic;
1089
1090 ieee80211_ratectl_node_deinit(ni);
1091 ic->ic_node_cleanup(ni);
1092 ieee80211_ies_cleanup(&ni->ni_ies);
1093 ieee80211_psq_cleanup(&ni->ni_psq);
1094 IEEE80211_FREE(ni, M_80211_NODE);
1095 }
1096
1097 static void
1098 node_age(struct ieee80211_node *ni)
1099 {
1100 struct ieee80211vap *vap = ni->ni_vap;
1101
1102 /*
1103 * Age frames on the power save queue.
1104 */
1105 if (ieee80211_node_psq_age(ni) != 0 &&
1106 ni->ni_psq.psq_len == 0 && vap->iv_set_tim != NULL)
1107 vap->iv_set_tim(ni, 0);
1108 /*
1109 * Age out HT resources (e.g. frames on the
1110 * A-MPDU reorder queues).
1111 */
1112 if (ni->ni_associd != 0 && (ni->ni_flags & IEEE80211_NODE_HT))
1113 ieee80211_ht_node_age(ni);
1114 }
1115
1116 static int8_t
1117 node_getrssi(const struct ieee80211_node *ni)
1118 {
1119 uint32_t avgrssi = ni->ni_avgrssi;
1120 int32_t rssi;
1121
1122 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER)
1123 return 0;
1124 rssi = IEEE80211_RSSI_GET(avgrssi);
1125 return rssi < 0 ? 0 : rssi > 127 ? 127 : rssi;
1126 }
1127
1128 static void
1129 node_getsignal(const struct ieee80211_node *ni, int8_t *rssi, int8_t *noise)
1130 {
1131 *rssi = node_getrssi(ni);
1132 *noise = ni->ni_noise;
1133 }
1134
1135 static void
1136 node_getmimoinfo(const struct ieee80211_node *ni,
1137 struct ieee80211_mimo_info *info)
1138 {
1139 int i;
1140 uint32_t avgrssi;
1141 int32_t rssi;
1142
1143 bzero(info, sizeof(*info));
1144
1145 for (i = 0; i < ni->ni_mimo_chains; i++) {
1146 avgrssi = ni->ni_mimo_rssi_ctl[i];
1147 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) {
1148 info->rssi[i] = 0;
1149 } else {
1150 rssi = IEEE80211_RSSI_GET(avgrssi);
1151 info->rssi[i] = rssi < 0 ? 0 : rssi > 127 ? 127 : rssi;
1152 }
1153 info->noise[i] = ni->ni_mimo_noise_ctl[i];
1154 }
1155
1156 /* XXX ext radios? */
1157
1158 /* XXX EVM? */
1159 }
1160
1161 struct ieee80211_node *
1162 ieee80211_alloc_node(struct ieee80211_node_table *nt,
1163 struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN])
1164 {
1165 struct ieee80211com *ic = nt->nt_ic;
1166 struct ieee80211_node *ni;
1167 int hash;
1168
1169 ni = ic->ic_node_alloc(vap, macaddr);
1170 if (ni == NULL) {
1171 vap->iv_stats.is_rx_nodealloc++;
1172 return NULL;
1173 }
1174
1175 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1176 "%s %p<%s> in %s table\n", __func__, ni,
1177 ether_sprintf(macaddr), nt->nt_name);
1178
1179 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr);
1180 hash = IEEE80211_NODE_HASH(ic, macaddr);
1181 ieee80211_node_initref(ni); /* mark referenced */
1182 ni->ni_chan = IEEE80211_CHAN_ANYC;
1183 ni->ni_authmode = IEEE80211_AUTH_OPEN;
1184 ni->ni_txpower = ic->ic_txpowlimit; /* max power */
1185 ni->ni_txparms = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)];
1186 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE);
1187 ni->ni_avgrssi = IEEE80211_RSSI_DUMMY_MARKER;
1188 ni->ni_inact_reload = nt->nt_inact_init;
1189 ni->ni_inact = ni->ni_inact_reload;
1190 ni->ni_ath_defkeyix = 0x7fff;
1191 ieee80211_psq_init(&ni->ni_psq, "unknown");
1192 #ifdef IEEE80211_SUPPORT_MESH
1193 if (vap->iv_opmode == IEEE80211_M_MBSS)
1194 ieee80211_mesh_node_init(vap, ni);
1195 #endif
1196 IEEE80211_NODE_LOCK(nt);
1197 TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list);
1198 LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash);
1199 ni->ni_table = nt;
1200 ni->ni_vap = vap;
1201 ni->ni_ic = ic;
1202 IEEE80211_NODE_UNLOCK(nt);
1203
1204 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni,
1205 "%s: inact_reload %u", __func__, ni->ni_inact_reload);
1206
1207 ieee80211_ratectl_node_init(ni);
1208
1209 return ni;
1210 }
1211
1212 /*
1213 * Craft a temporary node suitable for sending a management frame
1214 * to the specified station. We craft only as much state as we
1215 * need to do the work since the node will be immediately reclaimed
1216 * once the send completes.
1217 */
1218 struct ieee80211_node *
1219 ieee80211_tmp_node(struct ieee80211vap *vap,
1220 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1221 {
1222 struct ieee80211com *ic = vap->iv_ic;
1223 struct ieee80211_node *ni;
1224
1225 ni = ic->ic_node_alloc(vap, macaddr);
1226 if (ni != NULL) {
1227 struct ieee80211_node *bss = vap->iv_bss;
1228
1229 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1230 "%s %p<%s>\n", __func__, ni, ether_sprintf(macaddr));
1231
1232 ni->ni_table = NULL; /* NB: pedantic */
1233 ni->ni_ic = ic; /* NB: needed to set channel */
1234 ni->ni_vap = vap;
1235
1236 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr);
1237 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid);
1238 ieee80211_node_initref(ni); /* mark referenced */
1239 /* NB: required by ieee80211_fix_rate */
1240 ieee80211_node_set_chan(ni, bss->ni_chan);
1241 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey,
1242 IEEE80211_KEYIX_NONE);
1243 ni->ni_txpower = bss->ni_txpower;
1244 /* XXX optimize away */
1245 ieee80211_psq_init(&ni->ni_psq, "unknown");
1246
1247 ieee80211_ratectl_node_init(ni);
1248 } else {
1249 /* XXX msg */
1250 vap->iv_stats.is_rx_nodealloc++;
1251 }
1252 return ni;
1253 }
1254
1255 struct ieee80211_node *
1256 ieee80211_dup_bss(struct ieee80211vap *vap,
1257 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1258 {
1259 struct ieee80211com *ic = vap->iv_ic;
1260 struct ieee80211_node *ni;
1261
1262 ni = ieee80211_alloc_node(&ic->ic_sta, vap, macaddr);
1263 if (ni != NULL) {
1264 struct ieee80211_node *bss = vap->iv_bss;
1265 /*
1266 * Inherit from iv_bss.
1267 */
1268 copy_bss(ni, bss);
1269 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid);
1270 ieee80211_node_set_chan(ni, bss->ni_chan);
1271 }
1272 return ni;
1273 }
1274
1275 /*
1276 * Create a bss node for a legacy WDS vap. The far end does
1277 * not associate so we just create create a new node and
1278 * simulate an association. The caller is responsible for
1279 * installing the node as the bss node and handling any further
1280 * setup work like authorizing the port.
1281 */
1282 struct ieee80211_node *
1283 ieee80211_node_create_wds(struct ieee80211vap *vap,
1284 const uint8_t bssid[IEEE80211_ADDR_LEN], struct ieee80211_channel *chan)
1285 {
1286 struct ieee80211com *ic = vap->iv_ic;
1287 struct ieee80211_node *ni;
1288
1289 /* XXX check if node already in sta table? */
1290 ni = ieee80211_alloc_node(&ic->ic_sta, vap, bssid);
1291 if (ni != NULL) {
1292 ni->ni_wdsvap = vap;
1293 IEEE80211_ADDR_COPY(ni->ni_bssid, bssid);
1294 /*
1295 * Inherit any manually configured settings.
1296 */
1297 copy_bss(ni, vap->iv_bss);
1298 ieee80211_node_set_chan(ni, chan);
1299 /* NB: propagate ssid so available to WPA supplicant */
1300 ni->ni_esslen = vap->iv_des_ssid[0].len;
1301 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen);
1302 /* NB: no associd for peer */
1303 /*
1304 * There are no management frames to use to
1305 * discover neighbor capabilities, so blindly
1306 * propagate the local configuration.
1307 */
1308 if (vap->iv_flags & IEEE80211_F_WME)
1309 ni->ni_flags |= IEEE80211_NODE_QOS;
1310 #ifdef IEEE80211_SUPPORT_SUPERG
1311 if (vap->iv_flags & IEEE80211_F_FF)
1312 ni->ni_flags |= IEEE80211_NODE_FF;
1313 #endif
1314 if ((ic->ic_htcaps & IEEE80211_HTC_HT) &&
1315 (vap->iv_flags_ht & IEEE80211_FHT_HT)) {
1316 /*
1317 * Device is HT-capable and HT is enabled for
1318 * the vap; setup HT operation. On return
1319 * ni_chan will be adjusted to an HT channel.
1320 */
1321 ieee80211_ht_wds_init(ni);
1322 } else {
1323 struct ieee80211_channel *c = ni->ni_chan;
1324 /*
1325 * Force a legacy channel to be used.
1326 */
1327 c = ieee80211_find_channel(ic,
1328 c->ic_freq, c->ic_flags &~ IEEE80211_CHAN_HT);
1329 KASSERT(c != NULL, ("no legacy channel, %u/%x",
1330 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags));
1331 ni->ni_chan = c;
1332 }
1333 }
1334 return ni;
1335 }
1336
1337 struct ieee80211_node *
1338 #ifdef IEEE80211_DEBUG_REFCNT
1339 ieee80211_find_node_locked_debug(struct ieee80211_node_table *nt,
1340 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line)
1341 #else
1342 ieee80211_find_node_locked(struct ieee80211_node_table *nt,
1343 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1344 #endif
1345 {
1346 struct ieee80211_node *ni;
1347 int hash;
1348
1349 IEEE80211_NODE_LOCK_ASSERT(nt);
1350
1351 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr);
1352 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) {
1353 if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) {
1354 ieee80211_ref_node(ni); /* mark referenced */
1355 #ifdef IEEE80211_DEBUG_REFCNT
1356 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1357 "%s (%s:%u) %p<%s> refcnt %d\n", __func__,
1358 func, line,
1359 ni, ether_sprintf(ni->ni_macaddr),
1360 ieee80211_node_refcnt(ni));
1361 #endif
1362 return ni;
1363 }
1364 }
1365 return NULL;
1366 }
1367
1368 struct ieee80211_node *
1369 #ifdef IEEE80211_DEBUG_REFCNT
1370 ieee80211_find_node_debug(struct ieee80211_node_table *nt,
1371 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line)
1372 #else
1373 ieee80211_find_node(struct ieee80211_node_table *nt,
1374 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1375 #endif
1376 {
1377 struct ieee80211_node *ni;
1378
1379 IEEE80211_NODE_LOCK(nt);
1380 ni = ieee80211_find_node_locked(nt, macaddr);
1381 IEEE80211_NODE_UNLOCK(nt);
1382 return ni;
1383 }
1384
1385 struct ieee80211_node *
1386 #ifdef IEEE80211_DEBUG_REFCNT
1387 ieee80211_find_vap_node_locked_debug(struct ieee80211_node_table *nt,
1388 const struct ieee80211vap *vap,
1389 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line)
1390 #else
1391 ieee80211_find_vap_node_locked(struct ieee80211_node_table *nt,
1392 const struct ieee80211vap *vap,
1393 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1394 #endif
1395 {
1396 struct ieee80211_node *ni;
1397 int hash;
1398
1399 IEEE80211_NODE_LOCK_ASSERT(nt);
1400
1401 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr);
1402 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) {
1403 if (ni->ni_vap == vap &&
1404 IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) {
1405 ieee80211_ref_node(ni); /* mark referenced */
1406 #ifdef IEEE80211_DEBUG_REFCNT
1407 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1408 "%s (%s:%u) %p<%s> refcnt %d\n", __func__,
1409 func, line,
1410 ni, ether_sprintf(ni->ni_macaddr),
1411 ieee80211_node_refcnt(ni));
1412 #endif
1413 return ni;
1414 }
1415 }
1416 return NULL;
1417 }
1418
1419 struct ieee80211_node *
1420 #ifdef IEEE80211_DEBUG_REFCNT
1421 ieee80211_find_vap_node_debug(struct ieee80211_node_table *nt,
1422 const struct ieee80211vap *vap,
1423 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line)
1424 #else
1425 ieee80211_find_vap_node(struct ieee80211_node_table *nt,
1426 const struct ieee80211vap *vap,
1427 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1428 #endif
1429 {
1430 struct ieee80211_node *ni;
1431
1432 IEEE80211_NODE_LOCK(nt);
1433 ni = ieee80211_find_vap_node_locked(nt, vap, macaddr);
1434 IEEE80211_NODE_UNLOCK(nt);
1435 return ni;
1436 }
1437
1438 /*
1439 * Fake up a node; this handles node discovery in adhoc mode.
1440 * Note that for the driver's benefit we we treat this like
1441 * an association so the driver has an opportunity to setup
1442 * it's private state.
1443 */
1444 struct ieee80211_node *
1445 ieee80211_fakeup_adhoc_node(struct ieee80211vap *vap,
1446 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1447 {
1448 struct ieee80211_node *ni;
1449
1450 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE | IEEE80211_MSG_ASSOC,
1451 "%s: mac<%s>\n", __func__, ether_sprintf(macaddr));
1452 ni = ieee80211_dup_bss(vap, macaddr);
1453 if (ni != NULL) {
1454 struct ieee80211com *ic = vap->iv_ic;
1455
1456 /* XXX no rate negotiation; just dup */
1457 ni->ni_rates = vap->iv_bss->ni_rates;
1458 if (ieee80211_iserp_rateset(&ni->ni_rates))
1459 ni->ni_flags |= IEEE80211_NODE_ERP;
1460 if (vap->iv_opmode == IEEE80211_M_AHDEMO) {
1461 /*
1462 * In adhoc demo mode there are no management
1463 * frames to use to discover neighbor capabilities,
1464 * so blindly propagate the local configuration
1465 * so we can do interesting things (e.g. use
1466 * WME to disable ACK's).
1467 */
1468 if (vap->iv_flags & IEEE80211_F_WME)
1469 ni->ni_flags |= IEEE80211_NODE_QOS;
1470 #ifdef IEEE80211_SUPPORT_SUPERG
1471 if (vap->iv_flags & IEEE80211_F_FF)
1472 ni->ni_flags |= IEEE80211_NODE_FF;
1473 #endif
1474 }
1475 ieee80211_node_setuptxparms(ni);
1476 ieee80211_ratectl_node_init(ni);
1477 if (ic->ic_newassoc != NULL)
1478 ic->ic_newassoc(ni, 1);
1479 /* XXX not right for 802.1x/WPA */
1480 ieee80211_node_authorize(ni);
1481 }
1482 return ni;
1483 }
1484
1485 void
1486 ieee80211_init_neighbor(struct ieee80211_node *ni,
1487 const struct ieee80211_frame *wh,
1488 const struct ieee80211_scanparams *sp)
1489 {
1490 int do_ht_setup = 0;
1491
1492 ni->ni_esslen = sp->ssid[1];
1493 memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]);
1494 IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3);
1495 memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp));
1496 ni->ni_intval = sp->bintval;
1497 ni->ni_capinfo = sp->capinfo;
1498 ni->ni_chan = ni->ni_ic->ic_curchan;
1499 ni->ni_fhdwell = sp->fhdwell;
1500 ni->ni_fhindex = sp->fhindex;
1501 ni->ni_erp = sp->erp;
1502 ni->ni_timoff = sp->timoff;
1503 #ifdef IEEE80211_SUPPORT_MESH
1504 if (ni->ni_vap->iv_opmode == IEEE80211_M_MBSS)
1505 ieee80211_mesh_init_neighbor(ni, wh, sp);
1506 #endif
1507 if (ieee80211_ies_init(&ni->ni_ies, sp->ies, sp->ies_len)) {
1508 ieee80211_ies_expand(&ni->ni_ies);
1509 if (ni->ni_ies.wme_ie != NULL)
1510 ni->ni_flags |= IEEE80211_NODE_QOS;
1511 else
1512 ni->ni_flags &= ~IEEE80211_NODE_QOS;
1513 #ifdef IEEE80211_SUPPORT_SUPERG
1514 if (ni->ni_ies.ath_ie != NULL)
1515 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie);
1516 #endif
1517 if (ni->ni_ies.htcap_ie != NULL)
1518 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie);
1519 if (ni->ni_ies.htinfo_ie != NULL)
1520 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie);
1521
1522 if ((ni->ni_ies.htcap_ie != NULL) &&
1523 (ni->ni_ies.htinfo_ie != NULL) &&
1524 (ni->ni_vap->iv_flags_ht & IEEE80211_FHT_HT)) {
1525 do_ht_setup = 1;
1526 }
1527 }
1528
1529 /* NB: must be after ni_chan is setup */
1530 ieee80211_setup_rates(ni, sp->rates, sp->xrates,
1531 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE |
1532 IEEE80211_F_DONEGO | IEEE80211_F_DODEL);
1533
1534 /*
1535 * If the neighbor is HT compatible, flip that on.
1536 */
1537 if (do_ht_setup) {
1538 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC,
1539 "%s: doing HT setup\n", __func__);
1540 ieee80211_ht_node_init(ni);
1541 ieee80211_ht_updateparams(ni,
1542 ni->ni_ies.htcap_ie,
1543 ni->ni_ies.htinfo_ie);
1544 ieee80211_setup_htrates(ni,
1545 ni->ni_ies.htcap_ie,
1546 IEEE80211_F_JOIN | IEEE80211_F_DOBRS);
1547 ieee80211_setup_basic_htrates(ni,
1548 ni->ni_ies.htinfo_ie);
1549 ieee80211_node_setuptxparms(ni);
1550 ieee80211_ratectl_node_init(ni);
1551 }
1552 }
1553
1554 /*
1555 * Do node discovery in adhoc mode on receipt of a beacon
1556 * or probe response frame. Note that for the driver's
1557 * benefit we we treat this like an association so the
1558 * driver has an opportunity to setup it's private state.
1559 */
1560 struct ieee80211_node *
1561 ieee80211_add_neighbor(struct ieee80211vap *vap,
1562 const struct ieee80211_frame *wh,
1563 const struct ieee80211_scanparams *sp)
1564 {
1565 struct ieee80211_node *ni;
1566
1567 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC,
1568 "%s: mac<%s>\n", __func__, ether_sprintf(wh->i_addr2));
1569 ni = ieee80211_dup_bss(vap, wh->i_addr2);/* XXX alloc_node? */
1570 if (ni != NULL) {
1571 struct ieee80211com *ic = vap->iv_ic;
1572
1573 ieee80211_init_neighbor(ni, wh, sp);
1574 if (ieee80211_iserp_rateset(&ni->ni_rates))
1575 ni->ni_flags |= IEEE80211_NODE_ERP;
1576 ieee80211_node_setuptxparms(ni);
1577 ieee80211_ratectl_node_init(ni);
1578 if (ic->ic_newassoc != NULL)
1579 ic->ic_newassoc(ni, 1);
1580 /* XXX not right for 802.1x/WPA */
1581 ieee80211_node_authorize(ni);
1582 }
1583 return ni;
1584 }
1585
1586 #define IS_PROBEREQ(wh) \
1587 ((wh->i_fc[0] & (IEEE80211_FC0_TYPE_MASK|IEEE80211_FC0_SUBTYPE_MASK)) \
1588 == (IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ))
1589 #define IS_BCAST_PROBEREQ(wh) \
1590 (IS_PROBEREQ(wh) && IEEE80211_IS_MULTICAST( \
1591 ((const struct ieee80211_frame *)(wh))->i_addr3))
1592
1593 static __inline struct ieee80211_node *
1594 _find_rxnode(struct ieee80211_node_table *nt,
1595 const struct ieee80211_frame_min *wh)
1596 {
1597 if (IS_BCAST_PROBEREQ(wh))
1598 return NULL; /* spam bcast probe req to all vap's */
1599 return ieee80211_find_node_locked(nt, wh->i_addr2);
1600 }
1601
1602 /*
1603 * Locate the node for sender, track state, and then pass the
1604 * (referenced) node up to the 802.11 layer for its use. Note
1605 * we can return NULL if the sender is not in the table.
1606 */
1607 struct ieee80211_node *
1608 #ifdef IEEE80211_DEBUG_REFCNT
1609 ieee80211_find_rxnode_debug(struct ieee80211com *ic,
1610 const struct ieee80211_frame_min *wh, const char *func, int line)
1611 #else
1612 ieee80211_find_rxnode(struct ieee80211com *ic,
1613 const struct ieee80211_frame_min *wh)
1614 #endif
1615 {
1616 struct ieee80211_node_table *nt;
1617 struct ieee80211_node *ni;
1618
1619 nt = &ic->ic_sta;
1620 IEEE80211_NODE_LOCK(nt);
1621 ni = _find_rxnode(nt, wh);
1622 IEEE80211_NODE_UNLOCK(nt);
1623
1624 return ni;
1625 }
1626
1627 /*
1628 * Like ieee80211_find_rxnode but use the supplied h/w
1629 * key index as a hint to locate the node in the key
1630 * mapping table. If an entry is present at the key
1631 * index we return it; otherwise do a normal lookup and
1632 * update the mapping table if the station has a unicast
1633 * key assigned to it.
1634 */
1635 struct ieee80211_node *
1636 #ifdef IEEE80211_DEBUG_REFCNT
1637 ieee80211_find_rxnode_withkey_debug(struct ieee80211com *ic,
1638 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix,
1639 const char *func, int line)
1640 #else
1641 ieee80211_find_rxnode_withkey(struct ieee80211com *ic,
1642 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix)
1643 #endif
1644 {
1645 struct ieee80211_node_table *nt;
1646 struct ieee80211_node *ni;
1647
1648 nt = &ic->ic_sta;
1649 IEEE80211_NODE_LOCK(nt);
1650 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax)
1651 ni = nt->nt_keyixmap[keyix];
1652 else
1653 ni = NULL;
1654 if (ni == NULL) {
1655 ni = _find_rxnode(nt, wh);
1656 if (ni != NULL && nt->nt_keyixmap != NULL) {
1657 /*
1658 * If the station has a unicast key cache slot
1659 * assigned update the key->node mapping table.
1660 */
1661 keyix = ni->ni_ucastkey.wk_rxkeyix;
1662 /* XXX can keyixmap[keyix] != NULL? */
1663 if (keyix < nt->nt_keyixmax &&
1664 nt->nt_keyixmap[keyix] == NULL) {
1665 IEEE80211_DPRINTF(ni->ni_vap,
1666 IEEE80211_MSG_NODE,
1667 "%s: add key map entry %p<%s> refcnt %d\n",
1668 __func__, ni, ether_sprintf(ni->ni_macaddr),
1669 ieee80211_node_refcnt(ni)+1);
1670 nt->nt_keyixmap[keyix] = ieee80211_ref_node(ni);
1671 }
1672 }
1673 } else {
1674 if (IS_BCAST_PROBEREQ(wh))
1675 ni = NULL; /* spam bcast probe req to all vap's */
1676 else
1677 ieee80211_ref_node(ni);
1678 }
1679 IEEE80211_NODE_UNLOCK(nt);
1680
1681 return ni;
1682 }
1683 #undef IS_BCAST_PROBEREQ
1684 #undef IS_PROBEREQ
1685
1686 /*
1687 * Return a reference to the appropriate node for sending
1688 * a data frame. This handles node discovery in adhoc networks.
1689 */
1690 struct ieee80211_node *
1691 #ifdef IEEE80211_DEBUG_REFCNT
1692 ieee80211_find_txnode_debug(struct ieee80211vap *vap,
1693 const uint8_t macaddr[IEEE80211_ADDR_LEN],
1694 const char *func, int line)
1695 #else
1696 ieee80211_find_txnode(struct ieee80211vap *vap,
1697 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1698 #endif
1699 {
1700 struct ieee80211_node_table *nt = &vap->iv_ic->ic_sta;
1701 struct ieee80211_node *ni;
1702
1703 /*
1704 * The destination address should be in the node table
1705 * unless this is a multicast/broadcast frame. We can
1706 * also optimize station mode operation, all frames go
1707 * to the bss node.
1708 */
1709 /* XXX can't hold lock across dup_bss 'cuz of recursive locking */
1710 IEEE80211_NODE_LOCK(nt);
1711 if (vap->iv_opmode == IEEE80211_M_STA ||
1712 vap->iv_opmode == IEEE80211_M_WDS ||
1713 IEEE80211_IS_MULTICAST(macaddr))
1714 ni = ieee80211_ref_node(vap->iv_bss);
1715 else
1716 ni = ieee80211_find_node_locked(nt, macaddr);
1717 IEEE80211_NODE_UNLOCK(nt);
1718
1719 if (ni == NULL) {
1720 if (vap->iv_opmode == IEEE80211_M_IBSS ||
1721 vap->iv_opmode == IEEE80211_M_AHDEMO) {
1722 /*
1723 * In adhoc mode cons up a node for the destination.
1724 * Note that we need an additional reference for the
1725 * caller to be consistent with
1726 * ieee80211_find_node_locked.
1727 */
1728 ni = ieee80211_fakeup_adhoc_node(vap, macaddr);
1729 if (ni != NULL)
1730 (void) ieee80211_ref_node(ni);
1731 } else {
1732 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, macaddr,
1733 "no node, discard frame (%s)", __func__);
1734 vap->iv_stats.is_tx_nonode++;
1735 }
1736 }
1737 return ni;
1738 }
1739
1740 static void
1741 _ieee80211_free_node(struct ieee80211_node *ni)
1742 {
1743 struct ieee80211_node_table *nt = ni->ni_table;
1744
1745 /*
1746 * NB: careful about referencing the vap as it may be
1747 * gone if the last reference was held by a driver.
1748 * We know the com will always be present so it's safe
1749 * to use ni_ic below to reclaim resources.
1750 */
1751 #if 0
1752 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1753 "%s %p<%s> in %s table\n", __func__, ni,
1754 ether_sprintf(ni->ni_macaddr),
1755 nt != NULL ? nt->nt_name : "<gone>");
1756 #endif
1757 if (ni->ni_associd != 0) {
1758 struct ieee80211vap *vap = ni->ni_vap;
1759 if (vap->iv_aid_bitmap != NULL)
1760 IEEE80211_AID_CLR(vap, ni->ni_associd);
1761 }
1762 if (nt != NULL) {
1763 TAILQ_REMOVE(&nt->nt_node, ni, ni_list);
1764 LIST_REMOVE(ni, ni_hash);
1765 }
1766 ni->ni_ic->ic_node_free(ni);
1767 }
1768
1769 /*
1770 * Clear any entry in the unicast key mapping table.
1771 */
1772 static int
1773 node_clear_keyixmap(struct ieee80211_node_table *nt, struct ieee80211_node *ni)
1774 {
1775 ieee80211_keyix keyix;
1776
1777 keyix = ni->ni_ucastkey.wk_rxkeyix;
1778 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax &&
1779 nt->nt_keyixmap[keyix] == ni) {
1780 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1781 "%s: %p<%s> clear key map entry %u\n",
1782 __func__, ni, ether_sprintf(ni->ni_macaddr), keyix);
1783 nt->nt_keyixmap[keyix] = NULL;
1784 ieee80211_node_decref(ni);
1785 return 1;
1786 }
1787
1788 return 0;
1789 }
1790
1791 void
1792 #ifdef IEEE80211_DEBUG_REFCNT
1793 ieee80211_free_node_debug(struct ieee80211_node *ni, const char *func, int line)
1794 #else
1795 ieee80211_free_node(struct ieee80211_node *ni)
1796 #endif
1797 {
1798 struct ieee80211_node_table *nt = ni->ni_table;
1799
1800 #ifdef IEEE80211_DEBUG_REFCNT
1801 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1802 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni,
1803 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1);
1804 #endif
1805 if (nt != NULL) {
1806 IEEE80211_NODE_LOCK(nt);
1807 if (ieee80211_node_dectestref(ni)) {
1808 /*
1809 * Last reference, reclaim state.
1810 */
1811 _ieee80211_free_node(ni);
1812 } else if (ieee80211_node_refcnt(ni) == 1)
1813 if (node_clear_keyixmap(nt, ni))
1814 _ieee80211_free_node(ni);
1815 IEEE80211_NODE_UNLOCK(nt);
1816 } else {
1817 if (ieee80211_node_dectestref(ni))
1818 _ieee80211_free_node(ni);
1819 }
1820 }
1821
1822 /*
1823 * Reclaim a unicast key and clear any key cache state.
1824 */
1825 int
1826 ieee80211_node_delucastkey(struct ieee80211_node *ni)
1827 {
1828 struct ieee80211com *ic = ni->ni_ic;
1829 struct ieee80211_node_table *nt = &ic->ic_sta;
1830 struct ieee80211_node *nikey;
1831 ieee80211_keyix keyix;
1832 int isowned, status;
1833
1834 /*
1835 * NB: We must beware of LOR here; deleting the key
1836 * can cause the crypto layer to block traffic updates
1837 * which can generate a LOR against the node table lock;
1838 * grab it here and stash the key index for our use below.
1839 *
1840 * Must also beware of recursion on the node table lock.
1841 * When called from node_cleanup we may already have
1842 * the node table lock held. Unfortunately there's no
1843 * way to separate out this path so we must do this
1844 * conditionally.
1845 */
1846 isowned = IEEE80211_NODE_IS_LOCKED(nt);
1847 if (!isowned)
1848 IEEE80211_NODE_LOCK(nt);
1849 nikey = NULL;
1850 status = 1; /* NB: success */
1851 if (ni->ni_ucastkey.wk_keyix != IEEE80211_KEYIX_NONE) {
1852 keyix = ni->ni_ucastkey.wk_rxkeyix;
1853 status = ieee80211_crypto_delkey(ni->ni_vap, &ni->ni_ucastkey);
1854 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) {
1855 nikey = nt->nt_keyixmap[keyix];
1856 nt->nt_keyixmap[keyix] = NULL;
1857 }
1858 }
1859 if (!isowned)
1860 IEEE80211_NODE_UNLOCK(nt);
1861
1862 if (nikey != NULL) {
1863 KASSERT(nikey == ni,
1864 ("key map out of sync, ni %p nikey %p", ni, nikey));
1865 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1866 "%s: delete key map entry %p<%s> refcnt %d\n",
1867 __func__, ni, ether_sprintf(ni->ni_macaddr),
1868 ieee80211_node_refcnt(ni)-1);
1869 ieee80211_free_node(ni);
1870 }
1871 return status;
1872 }
1873
1874 /*
1875 * Reclaim a node. If this is the last reference count then
1876 * do the normal free work. Otherwise remove it from the node
1877 * table and mark it gone by clearing the back-reference.
1878 */
1879 static void
1880 node_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni)
1881 {
1882
1883 IEEE80211_NODE_LOCK_ASSERT(nt);
1884
1885 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1886 "%s: remove %p<%s> from %s table, refcnt %d\n",
1887 __func__, ni, ether_sprintf(ni->ni_macaddr),
1888 nt->nt_name, ieee80211_node_refcnt(ni)-1);
1889 /*
1890 * Clear any entry in the unicast key mapping table.
1891 * We need to do it here so rx lookups don't find it
1892 * in the mapping table even if it's not in the hash
1893 * table. We cannot depend on the mapping table entry
1894 * being cleared because the node may not be free'd.
1895 */
1896 (void)node_clear_keyixmap(nt, ni);
1897 if (!ieee80211_node_dectestref(ni)) {
1898 /*
1899 * Other references are present, just remove the
1900 * node from the table so it cannot be found. When
1901 * the references are dropped storage will be
1902 * reclaimed.
1903 */
1904 TAILQ_REMOVE(&nt->nt_node, ni, ni_list);
1905 LIST_REMOVE(ni, ni_hash);
1906 ni->ni_table = NULL; /* clear reference */
1907 } else
1908 _ieee80211_free_node(ni);
1909 }
1910
1911 /*
1912 * Node table support.
1913 */
1914
1915 static void
1916 ieee80211_node_table_init(struct ieee80211com *ic,
1917 struct ieee80211_node_table *nt,
1918 const char *name, int inact, int keyixmax)
1919 {
1920
1921 nt->nt_ic = ic;
1922 IEEE80211_NODE_LOCK_INIT(nt, ic->ic_name);
1923 TAILQ_INIT(&nt->nt_node);
1924 nt->nt_name = name;
1925 nt->nt_inact_init = inact;
1926 nt->nt_keyixmax = keyixmax;
1927 if (nt->nt_keyixmax > 0) {
1928 nt->nt_keyixmap = (struct ieee80211_node **) IEEE80211_MALLOC(
1929 keyixmax * sizeof(struct ieee80211_node *),
1930 M_80211_NODE,
1931 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
1932 if (nt->nt_keyixmap == NULL)
1933 ic_printf(ic,
1934 "Cannot allocate key index map with %u entries\n",
1935 keyixmax);
1936 } else
1937 nt->nt_keyixmap = NULL;
1938 }
1939
1940 static void
1941 ieee80211_node_table_reset(struct ieee80211_node_table *nt,
1942 struct ieee80211vap *match)
1943 {
1944 struct ieee80211_node *ni, *next;
1945
1946 IEEE80211_NODE_LOCK(nt);
1947 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) {
1948 if (match != NULL && ni->ni_vap != match)
1949 continue;
1950 /* XXX can this happen? if so need's work */
1951 if (ni->ni_associd != 0) {
1952 struct ieee80211vap *vap = ni->ni_vap;
1953
1954 if (vap->iv_auth->ia_node_leave != NULL)
1955 vap->iv_auth->ia_node_leave(ni);
1956 if (vap->iv_aid_bitmap != NULL)
1957 IEEE80211_AID_CLR(vap, ni->ni_associd);
1958 }
1959 ni->ni_wdsvap = NULL; /* clear reference */
1960 node_reclaim(nt, ni);
1961 }
1962 if (match != NULL && match->iv_opmode == IEEE80211_M_WDS) {
1963 /*
1964 * Make a separate pass to clear references to this vap
1965 * held by DWDS entries. They will not be matched above
1966 * because ni_vap will point to the ap vap but we still
1967 * need to clear ni_wdsvap when the WDS vap is destroyed
1968 * and/or reset.
1969 */
1970 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next)
1971 if (ni->ni_wdsvap == match)
1972 ni->ni_wdsvap = NULL;
1973 }
1974 IEEE80211_NODE_UNLOCK(nt);
1975 }
1976
1977 static void
1978 ieee80211_node_table_cleanup(struct ieee80211_node_table *nt)
1979 {
1980 ieee80211_node_table_reset(nt, NULL);
1981 if (nt->nt_keyixmap != NULL) {
1982 #ifdef DIAGNOSTIC
1983 /* XXX verify all entries are NULL */
1984 int i;
1985 for (i = 0; i < nt->nt_keyixmax; i++)
1986 if (nt->nt_keyixmap[i] != NULL)
1987 printf("%s: %s[%u] still active\n", __func__,
1988 nt->nt_name, i);
1989 #endif
1990 IEEE80211_FREE(nt->nt_keyixmap, M_80211_NODE);
1991 nt->nt_keyixmap = NULL;
1992 }
1993 IEEE80211_NODE_LOCK_DESTROY(nt);
1994 }
1995
1996 static void
1997 timeout_stations(void *arg __unused, struct ieee80211_node *ni)
1998 {
1999 struct ieee80211com *ic = ni->ni_ic;
2000 struct ieee80211vap *vap = ni->ni_vap;
2001
2002 /*
2003 * Only process stations when in RUN state. This
2004 * insures, for example, that we don't timeout an
2005 * inactive station during CAC. Note that CSA state
2006 * is actually handled in ieee80211_node_timeout as
2007 * it applies to more than timeout processing.
2008 */
2009 if (vap->iv_state != IEEE80211_S_RUN)
2010 return;
2011 /*
2012 * Ignore entries for which have yet to receive an
2013 * authentication frame. These are transient and
2014 * will be reclaimed when the last reference to them
2015 * goes away (when frame xmits complete).
2016 */
2017 if ((vap->iv_opmode == IEEE80211_M_HOSTAP ||
2018 vap->iv_opmode == IEEE80211_M_STA) &&
2019 (ni->ni_flags & IEEE80211_NODE_AREF) == 0)
2020 return;
2021 /*
2022 * Free fragment if not needed anymore
2023 * (last fragment older than 1s).
2024 * XXX doesn't belong here, move to node_age
2025 */
2026 if (ni->ni_rxfrag[0] != NULL &&
2027 ticks > ni->ni_rxfragstamp + hz) {
2028 m_freem(ni->ni_rxfrag[0]);
2029 ni->ni_rxfrag[0] = NULL;
2030 }
2031 if (ni->ni_inact > 0) {
2032 ni->ni_inact--;
2033 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni,
2034 "%s: inact %u inact_reload %u nrates %u",
2035 __func__, ni->ni_inact, ni->ni_inact_reload,
2036 ni->ni_rates.rs_nrates);
2037 }
2038 /*
2039 * Special case ourself; we may be idle for extended periods
2040 * of time and regardless reclaiming our state is wrong.
2041 * XXX run ic_node_age
2042 */
2043 /* XXX before inact decrement? */
2044 if (ni == vap->iv_bss)
2045 return;
2046 if (ni->ni_associd != 0 ||
2047 (vap->iv_opmode == IEEE80211_M_IBSS ||
2048 vap->iv_opmode == IEEE80211_M_AHDEMO)) {
2049 /*
2050 * Age/drain resources held by the station.
2051 */
2052 ic->ic_node_age(ni);
2053 /*
2054 * Probe the station before time it out. We
2055 * send a null data frame which may not be
2056 * universally supported by drivers (need it
2057 * for ps-poll support so it should be...).
2058 *
2059 * XXX don't probe the station unless we've
2060 * received a frame from them (and have
2061 * some idea of the rates they are capable
2062 * of); this will get fixed more properly
2063 * soon with better handling of the rate set.
2064 */
2065 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) &&
2066 (0 < ni->ni_inact &&
2067 ni->ni_inact <= vap->iv_inact_probe) &&
2068 ni->ni_rates.rs_nrates != 0) {
2069 IEEE80211_NOTE(vap,
2070 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE,
2071 ni, "%s",
2072 "probe station due to inactivity");
2073 /*
2074 * Grab a reference so the node cannot
2075 * be reclaimed before we send the frame.
2076 * ieee80211_send_nulldata understands
2077 * we've done this and reclaims the
2078 * ref for us as needed.
2079 */
2080 /* XXX fix this (not required anymore). */
2081 ieee80211_ref_node(ni);
2082 /* XXX useless */
2083 ieee80211_send_nulldata(ni);
2084 /* XXX stat? */
2085 return;
2086 }
2087 }
2088 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) &&
2089 ni->ni_inact <= 0) {
2090 IEEE80211_NOTE(vap,
2091 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, ni,
2092 "station timed out due to inactivity "
2093 "(refcnt %u)", ieee80211_node_refcnt(ni));
2094 /*
2095 * Send a deauthenticate frame and drop the station.
2096 * This is somewhat complicated due to reference counts
2097 * and locking. At this point a station will typically
2098 * have a reference count of 2. ieee80211_node_leave
2099 * will do a "free" of the node which will drop the
2100 * reference count. But in the meantime a reference
2101 * wil be held by the deauth frame. The actual reclaim
2102 * of the node will happen either after the tx is
2103 * completed or by ieee80211_node_leave.
2104 */
2105 if (ni->ni_associd != 0) {
2106 IEEE80211_SEND_MGMT(ni,
2107 IEEE80211_FC0_SUBTYPE_DEAUTH,
2108 IEEE80211_REASON_AUTH_EXPIRE);
2109 }
2110 ieee80211_node_leave(ni);
2111 vap->iv_stats.is_node_timeout++;
2112 }
2113 }
2114
2115 /*
2116 * Timeout inactive stations and do related housekeeping.
2117 */
2118 static void
2119 ieee80211_timeout_stations(struct ieee80211com *ic)
2120 {
2121 struct ieee80211_node_table *nt = &ic->ic_sta;
2122
2123 ieee80211_iterate_nodes(nt, timeout_stations, NULL);
2124 }
2125
2126 /*
2127 * Aggressively reclaim resources. This should be used
2128 * only in a critical situation to reclaim mbuf resources.
2129 */
2130 void
2131 ieee80211_drain(struct ieee80211com *ic)
2132 {
2133 struct ieee80211_node_table *nt = &ic->ic_sta;
2134 struct ieee80211vap *vap;
2135 struct ieee80211_node *ni;
2136
2137 IEEE80211_NODE_LOCK(nt);
2138 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) {
2139 /*
2140 * Ignore entries for which have yet to receive an
2141 * authentication frame. These are transient and
2142 * will be reclaimed when the last reference to them
2143 * goes away (when frame xmits complete).
2144 */
2145 vap = ni->ni_vap;
2146 /*
2147 * Only process stations when in RUN state. This
2148 * insures, for example, that we don't timeout an
2149 * inactive station during CAC. Note that CSA state
2150 * is actually handled in ieee80211_node_timeout as
2151 * it applies to more than timeout processing.
2152 */
2153 if (vap->iv_state != IEEE80211_S_RUN)
2154 continue;
2155 /* XXX can vap be NULL? */
2156 if ((vap->iv_opmode == IEEE80211_M_HOSTAP ||
2157 vap->iv_opmode == IEEE80211_M_STA) &&
2158 (ni->ni_flags & IEEE80211_NODE_AREF) == 0)
2159 continue;
2160 /*
2161 * Free fragments.
2162 * XXX doesn't belong here, move to node_drain
2163 */
2164 if (ni->ni_rxfrag[0] != NULL) {
2165 m_freem(ni->ni_rxfrag[0]);
2166 ni->ni_rxfrag[0] = NULL;
2167 }
2168 /*
2169 * Drain resources held by the station.
2170 */
2171 ic->ic_node_drain(ni);
2172 }
2173 IEEE80211_NODE_UNLOCK(nt);
2174 }
2175
2176 /*
2177 * Per-ieee80211com inactivity timer callback.
2178 */
2179 void
2180 ieee80211_node_timeout(void *arg)
2181 {
2182 struct ieee80211com *ic = arg;
2183
2184 /*
2185 * Defer timeout processing if a channel switch is pending.
2186 * We typically need to be mute so not doing things that
2187 * might generate frames is good to handle in one place.
2188 * Suppressing the station timeout processing may extend the
2189 * lifetime of inactive stations (by not decrementing their
2190 * idle counters) but this should be ok unless the CSA is
2191 * active for an unusually long time.
2192 */
2193 if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) {
2194 ieee80211_scan_timeout(ic);
2195 ieee80211_timeout_stations(ic);
2196 ieee80211_ageq_age(&ic->ic_stageq, IEEE80211_INACT_WAIT);
2197
2198 IEEE80211_LOCK(ic);
2199 ieee80211_erp_timeout(ic);
2200 ieee80211_ht_timeout(ic);
2201 IEEE80211_UNLOCK(ic);
2202 }
2203 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz,
2204 ieee80211_node_timeout, ic);
2205 }
2206
2207 /*
2208 * Iterate over the node table and return an array of ref'ed nodes.
2209 *
2210 * This is separated out from calling the actual node function so that
2211 * no LORs will occur.
2212 *
2213 * If there are too many nodes (ie, the number of nodes doesn't fit
2214 * within 'max_aid' entries) then the node references will be freed
2215 * and an error will be returned.
2216 *
2217 * The responsibility of allocating and freeing "ni_arr" is up to
2218 * the caller.
2219 */
2220 int
2221 ieee80211_iterate_nt(struct ieee80211_node_table *nt,
2222 struct ieee80211_node **ni_arr, uint16_t max_aid)
2223 {
2224 int i, j, ret;
2225 struct ieee80211_node *ni;
2226
2227 IEEE80211_NODE_LOCK(nt);
2228
2229 i = ret = 0;
2230 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) {
2231 if (i >= max_aid) {
2232 ret = E2BIG;
2233 ic_printf(nt->nt_ic, "Node array overflow: max=%u",
2234 max_aid);
2235 break;
2236 }
2237 ni_arr[i] = ieee80211_ref_node(ni);
2238 i++;
2239 }
2240
2241 /*
2242 * It's safe to unlock here.
2243 *
2244 * If we're successful, the list is returned.
2245 * If we're unsuccessful, the list is ignored
2246 * and we remove our references.
2247 *
2248 * This avoids any potential LOR with
2249 * ieee80211_free_node().
2250 */
2251 IEEE80211_NODE_UNLOCK(nt);
2252
2253 /*
2254 * If ret is non-zero, we hit some kind of error.
2255 * Rather than walking some nodes, we'll walk none
2256 * of them.
2257 */
2258 if (ret) {
2259 for (j = 0; j < i; j++) {
2260 /* ieee80211_free_node() locks by itself */
2261 ieee80211_free_node(ni_arr[j]);
2262 }
2263 }
2264
2265 return (ret);
2266 }
2267
2268 /*
2269 * Just a wrapper, so we don't have to change every ieee80211_iterate_nodes()
2270 * reference in the source.
2271 *
2272 * Note that this fetches 'max_aid' from the first VAP, rather than finding
2273 * the largest max_aid from all VAPs.
2274 */
2275 void
2276 ieee80211_iterate_nodes(struct ieee80211_node_table *nt,
2277 ieee80211_iter_func *f, void *arg)
2278 {
2279 struct ieee80211_node **ni_arr;
2280 size_t size;
2281 int i;
2282 uint16_t max_aid;
2283 struct ieee80211vap *vap;
2284
2285 /* Overdoing it default */
2286 max_aid = IEEE80211_AID_MAX;
2287
2288 /* Handle the case of there being no vaps just yet */
2289 vap = TAILQ_FIRST(&nt->nt_ic->ic_vaps);
2290 if (vap != NULL)
2291 max_aid = vap->iv_max_aid;
2292
2293 size = max_aid * sizeof(struct ieee80211_node *);
2294 ni_arr = (struct ieee80211_node **) IEEE80211_MALLOC(size, M_80211_NODE,
2295 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
2296 if (ni_arr == NULL)
2297 return;
2298
2299 /*
2300 * If this fails, the node table won't have any
2301 * valid entries - ieee80211_iterate_nt() frees
2302 * the references to them. So don't try walking
2303 * the table; just skip to the end and free the
2304 * temporary memory.
2305 */
2306 if (ieee80211_iterate_nt(nt, ni_arr, max_aid) != 0)
2307 goto done;
2308
2309 for (i = 0; i < max_aid; i++) {
2310 if (ni_arr[i] == NULL) /* end of the list */
2311 break;
2312 (*f)(arg, ni_arr[i]);
2313 /* ieee80211_free_node() locks by itself */
2314 ieee80211_free_node(ni_arr[i]);
2315 }
2316
2317 done:
2318 IEEE80211_FREE(ni_arr, M_80211_NODE);
2319 }
2320
2321 void
2322 ieee80211_dump_node(struct ieee80211_node_table *nt, struct ieee80211_node *ni)
2323 {
2324 printf("0x%p: mac %s refcnt %d\n", ni,
2325 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni));
2326 printf("\tauthmode %u flags 0x%x\n",
2327 ni->ni_authmode, ni->ni_flags);
2328 printf("\tassocid 0x%x txpower %u vlan %u\n",
2329 ni->ni_associd, ni->ni_txpower, ni->ni_vlan);
2330 printf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n",
2331 ni->ni_txseqs[IEEE80211_NONQOS_TID],
2332 ni->ni_rxseqs[IEEE80211_NONQOS_TID] >> IEEE80211_SEQ_SEQ_SHIFT,
2333 ni->ni_rxseqs[IEEE80211_NONQOS_TID] & IEEE80211_SEQ_FRAG_MASK,
2334 ni->ni_rxfragstamp);
2335 printf("\trssi %d noise %d intval %u capinfo 0x%x\n",
2336 node_getrssi(ni), ni->ni_noise,
2337 ni->ni_intval, ni->ni_capinfo);
2338 printf("\tbssid %s essid \"%.*s\" channel %u:0x%x\n",
2339 ether_sprintf(ni->ni_bssid),
2340 ni->ni_esslen, ni->ni_essid,
2341 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags);
2342 printf("\tinact %u inact_reload %u txrate %u\n",
2343 ni->ni_inact, ni->ni_inact_reload, ni->ni_txrate);
2344 printf("\thtcap %x htparam %x htctlchan %u ht2ndchan %u\n",
2345 ni->ni_htcap, ni->ni_htparam,
2346 ni->ni_htctlchan, ni->ni_ht2ndchan);
2347 printf("\thtopmode %x htstbc %x chw %u\n",
2348 ni->ni_htopmode, ni->ni_htstbc, ni->ni_chw);
2349 }
2350
2351 void
2352 ieee80211_dump_nodes(struct ieee80211_node_table *nt)
2353 {
2354 ieee80211_iterate_nodes(nt,
2355 (ieee80211_iter_func *) ieee80211_dump_node, nt);
2356 }
2357
2358 static void
2359 ieee80211_notify_erp_locked(struct ieee80211com *ic)
2360 {
2361 struct ieee80211vap *vap;
2362
2363 IEEE80211_LOCK_ASSERT(ic);
2364
2365 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
2366 if (vap->iv_opmode == IEEE80211_M_HOSTAP)
2367 ieee80211_beacon_notify(vap, IEEE80211_BEACON_ERP);
2368 }
2369
2370 void
2371 ieee80211_notify_erp(struct ieee80211com *ic)
2372 {
2373 IEEE80211_LOCK(ic);
2374 ieee80211_notify_erp_locked(ic);
2375 IEEE80211_UNLOCK(ic);
2376 }
2377
2378 /*
2379 * Handle a station joining an 11g network.
2380 */
2381 static void
2382 ieee80211_node_join_11g(struct ieee80211_node *ni)
2383 {
2384 struct ieee80211com *ic = ni->ni_ic;
2385
2386 IEEE80211_LOCK_ASSERT(ic);
2387
2388 /*
2389 * Station isn't capable of short slot time. Bump
2390 * the count of long slot time stations and disable
2391 * use of short slot time. Note that the actual switch
2392 * over to long slot time use may not occur until the
2393 * next beacon transmission (per sec. 7.3.1.4 of 11g).
2394 */
2395 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) {
2396 ic->ic_longslotsta++;
2397 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2398 "station needs long slot time, count %d",
2399 ic->ic_longslotsta);
2400 /* XXX vap's w/ conflicting needs won't work */
2401 if (!IEEE80211_IS_CHAN_108G(ic->ic_bsschan)) {
2402 /*
2403 * Don't force slot time when switched to turbo
2404 * mode as non-ERP stations won't be present; this
2405 * need only be done when on the normal G channel.
2406 */
2407 ieee80211_set_shortslottime(ic, 0);
2408 }
2409 }
2410 /*
2411 * If the new station is not an ERP station
2412 * then bump the counter and enable protection
2413 * if configured.
2414 */
2415 if (!ieee80211_iserp_rateset(&ni->ni_rates)) {
2416 ic->ic_nonerpsta++;
2417 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2418 "station is !ERP, %d non-ERP stations associated",
2419 ic->ic_nonerpsta);
2420 /*
2421 * If station does not support short preamble
2422 * then we must enable use of Barker preamble.
2423 */
2424 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) {
2425 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2426 "%s", "station needs long preamble");
2427 ic->ic_flags |= IEEE80211_F_USEBARKER;
2428 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE;
2429 }
2430 /*
2431 * If protection is configured and this is the first
2432 * indication we should use protection, enable it.
2433 */
2434 if (ic->ic_protmode != IEEE80211_PROT_NONE &&
2435 ic->ic_nonerpsta == 1 &&
2436 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) {
2437 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC,
2438 "%s: enable use of protection\n", __func__);
2439 ic->ic_flags |= IEEE80211_F_USEPROT;
2440 ieee80211_notify_erp_locked(ic);
2441 }
2442 } else
2443 ni->ni_flags |= IEEE80211_NODE_ERP;
2444 }
2445
2446 void
2447 ieee80211_node_join(struct ieee80211_node *ni, int resp)
2448 {
2449 struct ieee80211com *ic = ni->ni_ic;
2450 struct ieee80211vap *vap = ni->ni_vap;
2451 int newassoc;
2452
2453 if (ni->ni_associd == 0) {
2454 uint16_t aid;
2455
2456 KASSERT(vap->iv_aid_bitmap != NULL, ("no aid bitmap"));
2457 /*
2458 * It would be good to search the bitmap
2459 * more efficiently, but this will do for now.
2460 */
2461 for (aid = 1; aid < vap->iv_max_aid; aid++) {
2462 if (!IEEE80211_AID_ISSET(vap, aid))
2463 break;
2464 }
2465 if (aid >= vap->iv_max_aid) {
2466 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_TOOMANY);
2467 ieee80211_node_leave(ni);
2468 return;
2469 }
2470 ni->ni_associd = aid | 0xc000;
2471 ni->ni_jointime = time_uptime;
2472 IEEE80211_LOCK(ic);
2473 IEEE80211_AID_SET(vap, ni->ni_associd);
2474 vap->iv_sta_assoc++;
2475 ic->ic_sta_assoc++;
2476
2477 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan))
2478 ieee80211_ht_node_join(ni);
2479 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) &&
2480 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan))
2481 ieee80211_node_join_11g(ni);
2482 IEEE80211_UNLOCK(ic);
2483
2484 newassoc = 1;
2485 } else
2486 newassoc = 0;
2487
2488 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni,
2489 "station associated at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s",
2490 IEEE80211_NODE_AID(ni),
2491 ic->ic_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long",
2492 ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long",
2493 ic->ic_flags & IEEE80211_F_USEPROT ? ", protection" : "",
2494 ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "",
2495 ni->ni_flags & IEEE80211_NODE_HT ?
2496 (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "",
2497 ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "",
2498 ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" :
2499 ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "",
2500 ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "",
2501 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ?
2502 ", fast-frames" : "",
2503 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ?
2504 ", turbo" : ""
2505 );
2506
2507 ieee80211_node_setuptxparms(ni);
2508 ieee80211_ratectl_node_init(ni);
2509 /* give driver a chance to setup state like ni_txrate */
2510 if (ic->ic_newassoc != NULL)
2511 ic->ic_newassoc(ni, newassoc);
2512 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_SUCCESS);
2513 /* tell the authenticator about new station */
2514 if (vap->iv_auth->ia_node_join != NULL)
2515 vap->iv_auth->ia_node_join(ni);
2516 ieee80211_notify_node_join(ni,
2517 resp == IEEE80211_FC0_SUBTYPE_ASSOC_RESP);
2518 }
2519
2520 static void
2521 disable_protection(struct ieee80211com *ic)
2522 {
2523 KASSERT(ic->ic_nonerpsta == 0 &&
2524 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0,
2525 ("%d non ERP stations, flags 0x%x", ic->ic_nonerpsta,
2526 ic->ic_flags_ext));
2527
2528 ic->ic_flags &= ~IEEE80211_F_USEPROT;
2529 /* XXX verify mode? */
2530 if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) {
2531 ic->ic_flags |= IEEE80211_F_SHPREAMBLE;
2532 ic->ic_flags &= ~IEEE80211_F_USEBARKER;
2533 }
2534 ieee80211_notify_erp_locked(ic);
2535 }
2536
2537 /*
2538 * Handle a station leaving an 11g network.
2539 */
2540 static void
2541 ieee80211_node_leave_11g(struct ieee80211_node *ni)
2542 {
2543 struct ieee80211com *ic = ni->ni_ic;
2544
2545 IEEE80211_LOCK_ASSERT(ic);
2546
2547 KASSERT(IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan),
2548 ("not in 11g, bss %u:0x%x", ic->ic_bsschan->ic_freq,
2549 ic->ic_bsschan->ic_flags));
2550
2551 /*
2552 * If a long slot station do the slot time bookkeeping.
2553 */
2554 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) {
2555 KASSERT(ic->ic_longslotsta > 0,
2556 ("bogus long slot station count %d", ic->ic_longslotsta));
2557 ic->ic_longslotsta--;
2558 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2559 "long slot time station leaves, count now %d",
2560 ic->ic_longslotsta);
2561 if (ic->ic_longslotsta == 0) {
2562 /*
2563 * Re-enable use of short slot time if supported
2564 * and not operating in IBSS mode (per spec).
2565 */
2566 if ((ic->ic_caps & IEEE80211_C_SHSLOT) &&
2567 ic->ic_opmode != IEEE80211_M_IBSS) {
2568 IEEE80211_DPRINTF(ni->ni_vap,
2569 IEEE80211_MSG_ASSOC,
2570 "%s: re-enable use of short slot time\n",
2571 __func__);
2572 ieee80211_set_shortslottime(ic, 1);
2573 }
2574 }
2575 }
2576 /*
2577 * If a non-ERP station do the protection-related bookkeeping.
2578 */
2579 if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) {
2580 KASSERT(ic->ic_nonerpsta > 0,
2581 ("bogus non-ERP station count %d", ic->ic_nonerpsta));
2582 ic->ic_nonerpsta--;
2583 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2584 "non-ERP station leaves, count now %d%s", ic->ic_nonerpsta,
2585 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) ?
2586 " (non-ERP sta present)" : "");
2587 if (ic->ic_nonerpsta == 0 &&
2588 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) {
2589 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC,
2590 "%s: disable use of protection\n", __func__);
2591 disable_protection(ic);
2592 }
2593 }
2594 }
2595
2596 /*
2597 * Time out presence of an overlapping bss with non-ERP
2598 * stations. When operating in hostap mode we listen for
2599 * beacons from other stations and if we identify a non-ERP
2600 * station is present we enable protection. To identify
2601 * when all non-ERP stations are gone we time out this
2602 * condition.
2603 */
2604 static void
2605 ieee80211_erp_timeout(struct ieee80211com *ic)
2606 {
2607
2608 IEEE80211_LOCK_ASSERT(ic);
2609
2610 if ((ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) &&
2611 ieee80211_time_after(ticks, ic->ic_lastnonerp + IEEE80211_NONERP_PRESENT_AGE)) {
2612 #if 0
2613 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni,
2614 "%s", "age out non-ERP sta present on channel");
2615 #endif
2616 ic->ic_flags_ext &= ~IEEE80211_FEXT_NONERP_PR;
2617 if (ic->ic_nonerpsta == 0)
2618 disable_protection(ic);
2619 }
2620 }
2621
2622 /*
2623 * Handle bookkeeping for station deauthentication/disassociation
2624 * when operating as an ap.
2625 */
2626 void
2627 ieee80211_node_leave(struct ieee80211_node *ni)
2628 {
2629 struct ieee80211com *ic = ni->ni_ic;
2630 struct ieee80211vap *vap = ni->ni_vap;
2631 struct ieee80211_node_table *nt = ni->ni_table;
2632
2633 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni,
2634 "station with aid %d leaves", IEEE80211_NODE_AID(ni));
2635
2636 KASSERT(vap->iv_opmode != IEEE80211_M_STA,
2637 ("unexpected operating mode %u", vap->iv_opmode));
2638 /*
2639 * If node wasn't previously associated all
2640 * we need to do is reclaim the reference.
2641 */
2642 /* XXX ibss mode bypasses 11g and notification */
2643 if (ni->ni_associd == 0)
2644 goto done;
2645 /*
2646 * Tell the authenticator the station is leaving.
2647 * Note that we must do this before yanking the
2648 * association id as the authenticator uses the
2649 * associd to locate it's state block.
2650 */
2651 if (vap->iv_auth->ia_node_leave != NULL)
2652 vap->iv_auth->ia_node_leave(ni);
2653
2654 IEEE80211_LOCK(ic);
2655 IEEE80211_AID_CLR(vap, ni->ni_associd);
2656 vap->iv_sta_assoc--;
2657 ic->ic_sta_assoc--;
2658
2659 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan))
2660 ieee80211_ht_node_leave(ni);
2661 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) &&
2662 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan))
2663 ieee80211_node_leave_11g(ni);
2664 IEEE80211_UNLOCK(ic);
2665 /*
2666 * Cleanup station state. In particular clear various
2667 * state that might otherwise be reused if the node
2668 * is reused before the reference count goes to zero
2669 * (and memory is reclaimed).
2670 */
2671 ieee80211_sta_leave(ni);
2672 done:
2673 /*
2674 * Remove the node from any table it's recorded in and
2675 * drop the caller's reference. Removal from the table
2676 * is important to insure the node is not reprocessed
2677 * for inactivity.
2678 */
2679 if (nt != NULL) {
2680 IEEE80211_NODE_LOCK(nt);
2681 node_reclaim(nt, ni);
2682 IEEE80211_NODE_UNLOCK(nt);
2683 } else
2684 ieee80211_free_node(ni);
2685 }
2686
2687 struct rssiinfo {
2688 struct ieee80211vap *vap;
2689 int rssi_samples;
2690 uint32_t rssi_total;
2691 };
2692
2693 static void
2694 get_hostap_rssi(void *arg, struct ieee80211_node *ni)
2695 {
2696 struct rssiinfo *info = arg;
2697 struct ieee80211vap *vap = ni->ni_vap;
2698 int8_t rssi;
2699
2700 if (info->vap != vap)
2701 return;
2702 /* only associated stations */
2703 if (ni->ni_associd == 0)
2704 return;
2705 rssi = vap->iv_ic->ic_node_getrssi(ni);
2706 if (rssi != 0) {
2707 info->rssi_samples++;
2708 info->rssi_total += rssi;
2709 }
2710 }
2711
2712 static void
2713 get_adhoc_rssi(void *arg, struct ieee80211_node *ni)
2714 {
2715 struct rssiinfo *info = arg;
2716 struct ieee80211vap *vap = ni->ni_vap;
2717 int8_t rssi;
2718
2719 if (info->vap != vap)
2720 return;
2721 /* only neighbors */
2722 /* XXX check bssid */
2723 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 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 #ifdef IEEE80211_SUPPORT_MESH
2733 static void
2734 get_mesh_rssi(void *arg, struct ieee80211_node *ni)
2735 {
2736 struct rssiinfo *info = arg;
2737 struct ieee80211vap *vap = ni->ni_vap;
2738 int8_t rssi;
2739
2740 if (info->vap != vap)
2741 return;
2742 /* only neighbors that peered successfully */
2743 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED)
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 #endif /* IEEE80211_SUPPORT_MESH */
2752
2753 int8_t
2754 ieee80211_getrssi(struct ieee80211vap *vap)
2755 {
2756 #define NZ(x) ((x) == 0 ? 1 : (x))
2757 struct ieee80211com *ic = vap->iv_ic;
2758 struct rssiinfo info;
2759
2760 info.rssi_total = 0;
2761 info.rssi_samples = 0;
2762 info.vap = vap;
2763 switch (vap->iv_opmode) {
2764 case IEEE80211_M_IBSS: /* average of all ibss neighbors */
2765 case IEEE80211_M_AHDEMO: /* average of all neighbors */
2766 ieee80211_iterate_nodes(&ic->ic_sta, get_adhoc_rssi, &info);
2767 break;
2768 case IEEE80211_M_HOSTAP: /* average of all associated stations */
2769 ieee80211_iterate_nodes(&ic->ic_sta, get_hostap_rssi, &info);
2770 break;
2771 #ifdef IEEE80211_SUPPORT_MESH
2772 case IEEE80211_M_MBSS: /* average of all mesh neighbors */
2773 ieee80211_iterate_nodes(&ic->ic_sta, get_mesh_rssi, &info);
2774 break;
2775 #endif
2776 case IEEE80211_M_MONITOR: /* XXX */
2777 case IEEE80211_M_STA: /* use stats from associated ap */
2778 default:
2779 if (vap->iv_bss != NULL)
2780 info.rssi_total = ic->ic_node_getrssi(vap->iv_bss);
2781 info.rssi_samples = 1;
2782 break;
2783 }
2784 return info.rssi_total / NZ(info.rssi_samples);
2785 #undef NZ
2786 }
2787
2788 void
2789 ieee80211_getsignal(struct ieee80211vap *vap, int8_t *rssi, int8_t *noise)
2790 {
2791
2792 if (vap->iv_bss == NULL) /* NB: shouldn't happen */
2793 return;
2794 vap->iv_ic->ic_node_getsignal(vap->iv_bss, rssi, noise);
2795 /* for non-station mode return avg'd rssi accounting */
2796 if (vap->iv_opmode != IEEE80211_M_STA)
2797 *rssi = ieee80211_getrssi(vap);
2798 }
Cache object: b3a8ea07f8736acf38685e5861806a27
|