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, CALLOUT_MPSAFE);
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 * XXX Gotta be careful here; the rate set returned by
289 * ieee80211_get_suprates is actually any HT rate
290 * set so blindly copying it will be bad. We must
291 * install the legacy rate est in ni_rates and the
292 * HT rate set in ni_htrates.
293 */
294 ni->ni_htrates = *ieee80211_get_suphtrates(ic, chan);
295 /*
296 * Setup bss tx parameters based on operating mode. We
297 * use legacy rates when operating in a mixed HT+non-HT bss
298 * and non-ERP rates in 11g for mixed ERP+non-ERP bss.
299 */
300 if (mode == IEEE80211_MODE_11NA &&
301 (vap->iv_flags_ht & IEEE80211_FHT_PUREN) == 0)
302 mode = IEEE80211_MODE_11A;
303 else if (mode == IEEE80211_MODE_11NG &&
304 (vap->iv_flags_ht & IEEE80211_FHT_PUREN) == 0)
305 mode = IEEE80211_MODE_11G;
306 if (mode == IEEE80211_MODE_11G &&
307 (vap->iv_flags & IEEE80211_F_PUREG) == 0)
308 mode = IEEE80211_MODE_11B;
309 }
310 ni->ni_txparms = &vap->iv_txparms[mode];
311 ni->ni_rates = *ieee80211_get_suprates(ic, chan);
312 }
313
314 static __inline void
315 copy_bss(struct ieee80211_node *nbss, const struct ieee80211_node *obss)
316 {
317 /* propagate useful state */
318 nbss->ni_authmode = obss->ni_authmode;
319 nbss->ni_txpower = obss->ni_txpower;
320 nbss->ni_vlan = obss->ni_vlan;
321 /* XXX statistics? */
322 /* XXX legacy WDS bssid? */
323 }
324
325 void
326 ieee80211_create_ibss(struct ieee80211vap* vap, struct ieee80211_channel *chan)
327 {
328 struct ieee80211com *ic = vap->iv_ic;
329 struct ieee80211_node *ni;
330
331 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN,
332 "%s: creating %s on channel %u\n", __func__,
333 ieee80211_opmode_name[vap->iv_opmode],
334 ieee80211_chan2ieee(ic, chan));
335
336 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr);
337 if (ni == NULL) {
338 /* XXX recovery? */
339 return;
340 }
341 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr);
342 ni->ni_esslen = vap->iv_des_ssid[0].len;
343 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen);
344 if (vap->iv_bss != NULL)
345 copy_bss(ni, vap->iv_bss);
346 ni->ni_intval = ic->ic_bintval;
347 if (vap->iv_flags & IEEE80211_F_PRIVACY)
348 ni->ni_capinfo |= IEEE80211_CAPINFO_PRIVACY;
349 if (ic->ic_phytype == IEEE80211_T_FH) {
350 ni->ni_fhdwell = 200; /* XXX */
351 ni->ni_fhindex = 1;
352 }
353 if (vap->iv_opmode == IEEE80211_M_IBSS) {
354 vap->iv_flags |= IEEE80211_F_SIBSS;
355 ni->ni_capinfo |= IEEE80211_CAPINFO_IBSS; /* XXX */
356 if (vap->iv_flags & IEEE80211_F_DESBSSID)
357 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid);
358 else {
359 get_random_bytes(ni->ni_bssid, IEEE80211_ADDR_LEN);
360 /* clear group bit, add local bit */
361 ni->ni_bssid[0] = (ni->ni_bssid[0] &~ 0x01) | 0x02;
362 }
363 } else if (vap->iv_opmode == IEEE80211_M_AHDEMO) {
364 if (vap->iv_flags & IEEE80211_F_DESBSSID)
365 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid);
366 else
367 #ifdef IEEE80211_SUPPORT_TDMA
368 if ((vap->iv_caps & IEEE80211_C_TDMA) == 0)
369 #endif
370 memset(ni->ni_bssid, 0, IEEE80211_ADDR_LEN);
371 #ifdef IEEE80211_SUPPORT_MESH
372 } else if (vap->iv_opmode == IEEE80211_M_MBSS) {
373 ni->ni_meshidlen = vap->iv_mesh->ms_idlen;
374 memcpy(ni->ni_meshid, vap->iv_mesh->ms_id, ni->ni_meshidlen);
375 #endif
376 }
377 /*
378 * Fix the channel and related attributes.
379 */
380 /* clear DFS CAC state on previous channel */
381 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC &&
382 ic->ic_bsschan->ic_freq != chan->ic_freq &&
383 IEEE80211_IS_CHAN_CACDONE(ic->ic_bsschan))
384 ieee80211_dfs_cac_clear(ic, ic->ic_bsschan);
385 ic->ic_bsschan = chan;
386 ieee80211_node_set_chan(ni, chan);
387 ic->ic_curmode = ieee80211_chan2mode(chan);
388 /*
389 * Do mode-specific setup.
390 */
391 if (IEEE80211_IS_CHAN_FULL(chan)) {
392 if (IEEE80211_IS_CHAN_ANYG(chan)) {
393 /*
394 * Use a mixed 11b/11g basic rate set.
395 */
396 ieee80211_setbasicrates(&ni->ni_rates,
397 IEEE80211_MODE_11G);
398 if (vap->iv_flags & IEEE80211_F_PUREG) {
399 /*
400 * Also mark OFDM rates basic so 11b
401 * stations do not join (WiFi compliance).
402 */
403 ieee80211_addbasicrates(&ni->ni_rates,
404 IEEE80211_MODE_11A);
405 }
406 } else if (IEEE80211_IS_CHAN_B(chan)) {
407 /*
408 * Force pure 11b rate set.
409 */
410 ieee80211_setbasicrates(&ni->ni_rates,
411 IEEE80211_MODE_11B);
412 }
413 }
414
415 (void) ieee80211_sta_join1(ieee80211_ref_node(ni));
416 }
417
418 /*
419 * Reset bss state on transition to the INIT state.
420 * Clear any stations from the table (they have been
421 * deauth'd) and reset the bss node (clears key, rate
422 * etc. state).
423 */
424 void
425 ieee80211_reset_bss(struct ieee80211vap *vap)
426 {
427 struct ieee80211com *ic = vap->iv_ic;
428 struct ieee80211_node *ni, *obss;
429
430 ieee80211_node_table_reset(&ic->ic_sta, vap);
431 /* XXX multi-bss: wrong */
432 ieee80211_reset_erp(ic);
433
434 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr);
435 KASSERT(ni != NULL, ("unable to setup initial BSS node"));
436 obss = vap->iv_bss;
437 vap->iv_bss = ieee80211_ref_node(ni);
438 if (obss != NULL) {
439 copy_bss(ni, obss);
440 ni->ni_intval = ic->ic_bintval;
441 ieee80211_free_node(obss);
442 } else
443 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr);
444 }
445
446 static int
447 match_ssid(const struct ieee80211_node *ni,
448 int nssid, const struct ieee80211_scan_ssid ssids[])
449 {
450 int i;
451
452 for (i = 0; i < nssid; i++) {
453 if (ni->ni_esslen == ssids[i].len &&
454 memcmp(ni->ni_essid, ssids[i].ssid, ni->ni_esslen) == 0)
455 return 1;
456 }
457 return 0;
458 }
459
460 /*
461 * Test a node for suitability/compatibility.
462 */
463 static int
464 check_bss(struct ieee80211vap *vap, struct ieee80211_node *ni)
465 {
466 struct ieee80211com *ic = ni->ni_ic;
467 uint8_t rate;
468
469 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan)))
470 return 0;
471 if (vap->iv_opmode == IEEE80211_M_IBSS) {
472 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0)
473 return 0;
474 } else {
475 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0)
476 return 0;
477 }
478 if (vap->iv_flags & IEEE80211_F_PRIVACY) {
479 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0)
480 return 0;
481 } else {
482 /* XXX does this mean privacy is supported or required? */
483 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY)
484 return 0;
485 }
486 rate = ieee80211_fix_rate(ni, &ni->ni_rates,
487 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE);
488 if (rate & IEEE80211_RATE_BASIC)
489 return 0;
490 if (vap->iv_des_nssid != 0 &&
491 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid))
492 return 0;
493 if ((vap->iv_flags & IEEE80211_F_DESBSSID) &&
494 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid))
495 return 0;
496 return 1;
497 }
498
499 #ifdef IEEE80211_DEBUG
500 /*
501 * Display node suitability/compatibility.
502 */
503 static void
504 check_bss_debug(struct ieee80211vap *vap, struct ieee80211_node *ni)
505 {
506 struct ieee80211com *ic = ni->ni_ic;
507 uint8_t rate;
508 int fail;
509
510 fail = 0;
511 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan)))
512 fail |= 0x01;
513 if (vap->iv_opmode == IEEE80211_M_IBSS) {
514 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0)
515 fail |= 0x02;
516 } else {
517 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0)
518 fail |= 0x02;
519 }
520 if (vap->iv_flags & IEEE80211_F_PRIVACY) {
521 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0)
522 fail |= 0x04;
523 } else {
524 /* XXX does this mean privacy is supported or required? */
525 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY)
526 fail |= 0x04;
527 }
528 rate = ieee80211_fix_rate(ni, &ni->ni_rates,
529 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE);
530 if (rate & IEEE80211_RATE_BASIC)
531 fail |= 0x08;
532 if (vap->iv_des_nssid != 0 &&
533 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid))
534 fail |= 0x10;
535 if ((vap->iv_flags & IEEE80211_F_DESBSSID) &&
536 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid))
537 fail |= 0x20;
538
539 printf(" %c %s", fail ? '-' : '+', ether_sprintf(ni->ni_macaddr));
540 printf(" %s%c", ether_sprintf(ni->ni_bssid), fail & 0x20 ? '!' : ' ');
541 printf(" %3d%c",
542 ieee80211_chan2ieee(ic, ni->ni_chan), fail & 0x01 ? '!' : ' ');
543 printf(" %2dM%c", (rate & IEEE80211_RATE_VAL) / 2,
544 fail & 0x08 ? '!' : ' ');
545 printf(" %4s%c",
546 (ni->ni_capinfo & IEEE80211_CAPINFO_ESS) ? "ess" :
547 (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) ? "ibss" :
548 "????",
549 fail & 0x02 ? '!' : ' ');
550 printf(" %3s%c ",
551 (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) ? "wep" : "no",
552 fail & 0x04 ? '!' : ' ');
553 ieee80211_print_essid(ni->ni_essid, ni->ni_esslen);
554 printf("%s\n", fail & 0x10 ? "!" : "");
555 }
556 #endif /* IEEE80211_DEBUG */
557
558 /*
559 * Handle 802.11 ad hoc network merge. The
560 * convention, set by the Wireless Ethernet Compatibility Alliance
561 * (WECA), is that an 802.11 station will change its BSSID to match
562 * the "oldest" 802.11 ad hoc network, on the same channel, that
563 * has the station's desired SSID. The "oldest" 802.11 network
564 * sends beacons with the greatest TSF timestamp.
565 *
566 * The caller is assumed to validate TSF's before attempting a merge.
567 *
568 * Return !0 if the BSSID changed, 0 otherwise.
569 */
570 int
571 ieee80211_ibss_merge(struct ieee80211_node *ni)
572 {
573 struct ieee80211vap *vap = ni->ni_vap;
574 #ifdef IEEE80211_DEBUG
575 struct ieee80211com *ic = ni->ni_ic;
576 #endif
577
578 if (ni == vap->iv_bss ||
579 IEEE80211_ADDR_EQ(ni->ni_bssid, vap->iv_bss->ni_bssid)) {
580 /* unchanged, nothing to do */
581 return 0;
582 }
583 if (!check_bss(vap, ni)) {
584 /* capabilities mismatch */
585 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC,
586 "%s: merge failed, capabilities mismatch\n", __func__);
587 #ifdef IEEE80211_DEBUG
588 if (ieee80211_msg_assoc(vap))
589 check_bss_debug(vap, ni);
590 #endif
591 vap->iv_stats.is_ibss_capmismatch++;
592 return 0;
593 }
594 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC,
595 "%s: new bssid %s: %s preamble, %s slot time%s\n", __func__,
596 ether_sprintf(ni->ni_bssid),
597 ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long",
598 ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long",
599 ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : ""
600 );
601 return ieee80211_sta_join1(ieee80211_ref_node(ni));
602 }
603
604 /*
605 * Calculate HT channel promotion flags for all vaps.
606 * This assumes ni_chan have been setup for each vap.
607 */
608 static int
609 gethtadjustflags(struct ieee80211com *ic)
610 {
611 struct ieee80211vap *vap;
612 int flags;
613
614 flags = 0;
615 /* XXX locking */
616 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
617 if (vap->iv_state < IEEE80211_S_RUN)
618 continue;
619 switch (vap->iv_opmode) {
620 case IEEE80211_M_WDS:
621 case IEEE80211_M_STA:
622 case IEEE80211_M_AHDEMO:
623 case IEEE80211_M_HOSTAP:
624 case IEEE80211_M_IBSS:
625 case IEEE80211_M_MBSS:
626 flags |= ieee80211_htchanflags(vap->iv_bss->ni_chan);
627 break;
628 default:
629 break;
630 }
631 }
632 return flags;
633 }
634
635 /*
636 * Check if the current channel needs to change based on whether
637 * any vap's are using HT20/HT40. This is used to sync the state
638 * of ic_curchan after a channel width change on a running vap.
639 */
640 void
641 ieee80211_sync_curchan(struct ieee80211com *ic)
642 {
643 struct ieee80211_channel *c;
644
645 c = ieee80211_ht_adjust_channel(ic, ic->ic_curchan, gethtadjustflags(ic));
646 if (c != ic->ic_curchan) {
647 ic->ic_curchan = c;
648 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan);
649 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan);
650 IEEE80211_UNLOCK(ic);
651 ic->ic_set_channel(ic);
652 ieee80211_radiotap_chan_change(ic);
653 IEEE80211_LOCK(ic);
654 }
655 }
656
657 /*
658 * Setup the current channel. The request channel may be
659 * promoted if other vap's are operating with HT20/HT40.
660 */
661 void
662 ieee80211_setupcurchan(struct ieee80211com *ic, struct ieee80211_channel *c)
663 {
664 if (ic->ic_htcaps & IEEE80211_HTC_HT) {
665 int flags = gethtadjustflags(ic);
666 /*
667 * Check for channel promotion required to support the
668 * set of running vap's. This assumes we are called
669 * after ni_chan is setup for each vap.
670 */
671 /* NB: this assumes IEEE80211_FHT_USEHT40 > IEEE80211_FHT_HT */
672 if (flags > ieee80211_htchanflags(c))
673 c = ieee80211_ht_adjust_channel(ic, c, flags);
674 }
675 ic->ic_bsschan = ic->ic_curchan = c;
676 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan);
677 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan);
678 }
679
680 /*
681 * Change the current channel. The channel change is guaranteed to have
682 * happened before the next state change.
683 */
684 void
685 ieee80211_setcurchan(struct ieee80211com *ic, struct ieee80211_channel *c)
686 {
687 ieee80211_setupcurchan(ic, c);
688 ieee80211_runtask(ic, &ic->ic_chan_task);
689 }
690
691 /*
692 * Join the specified IBSS/BSS network. The node is assumed to
693 * be passed in with a held reference.
694 */
695 static int
696 ieee80211_sta_join1(struct ieee80211_node *selbs)
697 {
698 struct ieee80211vap *vap = selbs->ni_vap;
699 struct ieee80211com *ic = selbs->ni_ic;
700 struct ieee80211_node *obss;
701 int canreassoc;
702
703 /*
704 * Committed to selbs, setup state.
705 */
706 obss = vap->iv_bss;
707 /*
708 * Check if old+new node have the same address in which
709 * case we can reassociate when operating in sta mode.
710 */
711 canreassoc = (obss != NULL &&
712 vap->iv_state == IEEE80211_S_RUN &&
713 IEEE80211_ADDR_EQ(obss->ni_macaddr, selbs->ni_macaddr));
714 vap->iv_bss = selbs; /* NB: caller assumed to bump refcnt */
715 if (obss != NULL) {
716 copy_bss(selbs, obss);
717 ieee80211_node_decref(obss); /* iv_bss reference */
718 ieee80211_free_node(obss); /* station table reference */
719 obss = NULL; /* NB: guard against later use */
720 }
721
722 /*
723 * Delete unusable rates; we've already checked
724 * that the negotiated rate set is acceptable.
725 */
726 ieee80211_fix_rate(vap->iv_bss, &vap->iv_bss->ni_rates,
727 IEEE80211_F_DODEL | IEEE80211_F_JOIN);
728
729 ieee80211_setcurchan(ic, selbs->ni_chan);
730 /*
731 * Set the erp state (mostly the slot time) to deal with
732 * the auto-select case; this should be redundant if the
733 * mode is locked.
734 */
735 ieee80211_reset_erp(ic);
736 ieee80211_wme_initparams(vap);
737
738 if (vap->iv_opmode == IEEE80211_M_STA) {
739 if (canreassoc) {
740 /* Reassociate */
741 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 1);
742 } else {
743 /*
744 * Act as if we received a DEAUTH frame in case we
745 * are invoked from the RUN state. This will cause
746 * us to try to re-authenticate if we are operating
747 * as a station.
748 */
749 ieee80211_new_state(vap, IEEE80211_S_AUTH,
750 IEEE80211_FC0_SUBTYPE_DEAUTH);
751 }
752 } else
753 ieee80211_new_state(vap, IEEE80211_S_RUN, -1);
754 return 1;
755 }
756
757 int
758 ieee80211_sta_join(struct ieee80211vap *vap, struct ieee80211_channel *chan,
759 const struct ieee80211_scan_entry *se)
760 {
761 struct ieee80211com *ic = vap->iv_ic;
762 struct ieee80211_node *ni;
763
764 ni = ieee80211_alloc_node(&ic->ic_sta, vap, se->se_macaddr);
765 if (ni == NULL) {
766 /* XXX msg */
767 return 0;
768 }
769 /*
770 * Expand scan state into node's format.
771 * XXX may not need all this stuff
772 */
773 IEEE80211_ADDR_COPY(ni->ni_bssid, se->se_bssid);
774 ni->ni_esslen = se->se_ssid[1];
775 memcpy(ni->ni_essid, se->se_ssid+2, ni->ni_esslen);
776 ni->ni_tstamp.tsf = se->se_tstamp.tsf;
777 ni->ni_intval = se->se_intval;
778 ni->ni_capinfo = se->se_capinfo;
779 ni->ni_chan = chan;
780 ni->ni_timoff = se->se_timoff;
781 ni->ni_fhdwell = se->se_fhdwell;
782 ni->ni_fhindex = se->se_fhindex;
783 ni->ni_erp = se->se_erp;
784 IEEE80211_RSSI_LPF(ni->ni_avgrssi, se->se_rssi);
785 ni->ni_noise = se->se_noise;
786 if (vap->iv_opmode == IEEE80211_M_STA) {
787 /* NB: only infrastructure mode requires an associd */
788 ni->ni_flags |= IEEE80211_NODE_ASSOCID;
789 }
790
791 if (ieee80211_ies_init(&ni->ni_ies, se->se_ies.data, se->se_ies.len)) {
792 ieee80211_ies_expand(&ni->ni_ies);
793 #ifdef IEEE80211_SUPPORT_SUPERG
794 if (ni->ni_ies.ath_ie != NULL)
795 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie);
796 #endif
797 if (ni->ni_ies.htcap_ie != NULL)
798 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie);
799 if (ni->ni_ies.htinfo_ie != NULL)
800 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie);
801 #ifdef IEEE80211_SUPPORT_MESH
802 if (ni->ni_ies.meshid_ie != NULL)
803 ieee80211_parse_meshid(ni, ni->ni_ies.meshid_ie);
804 #endif
805 #ifdef IEEE80211_SUPPORT_TDMA
806 if (ni->ni_ies.tdma_ie != NULL)
807 ieee80211_parse_tdma(ni, ni->ni_ies.tdma_ie);
808 #endif
809 }
810
811 vap->iv_dtim_period = se->se_dtimperiod;
812 vap->iv_dtim_count = 0;
813
814 /* NB: must be after ni_chan is setup */
815 ieee80211_setup_rates(ni, se->se_rates, se->se_xrates,
816 IEEE80211_F_DOSORT);
817 if (ieee80211_iserp_rateset(&ni->ni_rates))
818 ni->ni_flags |= IEEE80211_NODE_ERP;
819 ieee80211_node_setuptxparms(ni);
820 ieee80211_ratectl_node_init(ni);
821
822 return ieee80211_sta_join1(ieee80211_ref_node(ni));
823 }
824
825 /*
826 * Leave the specified IBSS/BSS network. The node is assumed to
827 * be passed in with a held reference.
828 */
829 void
830 ieee80211_sta_leave(struct ieee80211_node *ni)
831 {
832 struct ieee80211com *ic = ni->ni_ic;
833
834 ic->ic_node_cleanup(ni);
835 ieee80211_notify_node_leave(ni);
836 }
837
838 /*
839 * Send a deauthenticate frame and drop the station.
840 */
841 void
842 ieee80211_node_deauth(struct ieee80211_node *ni, int reason)
843 {
844 /* NB: bump the refcnt to be sure temporay nodes are not reclaimed */
845 ieee80211_ref_node(ni);
846 if (ni->ni_associd != 0)
847 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH, reason);
848 ieee80211_node_leave(ni);
849 ieee80211_free_node(ni);
850 }
851
852 static struct ieee80211_node *
853 node_alloc(struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN])
854 {
855 struct ieee80211_node *ni;
856
857 ni = (struct ieee80211_node *) malloc(sizeof(struct ieee80211_node),
858 M_80211_NODE, M_NOWAIT | M_ZERO);
859 return ni;
860 }
861
862 /*
863 * Initialize an ie blob with the specified data. If previous
864 * data exists re-use the data block. As a side effect we clear
865 * all references to specific ie's; the caller is required to
866 * recalculate them.
867 */
868 int
869 ieee80211_ies_init(struct ieee80211_ies *ies, const uint8_t *data, int len)
870 {
871 /* NB: assumes data+len are the last fields */
872 memset(ies, 0, offsetof(struct ieee80211_ies, data));
873 if (ies->data != NULL && ies->len != len) {
874 /* data size changed */
875 free(ies->data, M_80211_NODE_IE);
876 ies->data = NULL;
877 }
878 if (ies->data == NULL) {
879 ies->data = (uint8_t *) malloc(len, M_80211_NODE_IE, M_NOWAIT);
880 if (ies->data == NULL) {
881 ies->len = 0;
882 /* NB: pointers have already been zero'd above */
883 return 0;
884 }
885 }
886 memcpy(ies->data, data, len);
887 ies->len = len;
888 return 1;
889 }
890
891 /*
892 * Reclaim storage for an ie blob.
893 */
894 void
895 ieee80211_ies_cleanup(struct ieee80211_ies *ies)
896 {
897 if (ies->data != NULL)
898 free(ies->data, M_80211_NODE_IE);
899 }
900
901 /*
902 * Expand an ie blob data contents and to fillin individual
903 * ie pointers. The data blob is assumed to be well-formed;
904 * we don't do any validity checking of ie lengths.
905 */
906 void
907 ieee80211_ies_expand(struct ieee80211_ies *ies)
908 {
909 uint8_t *ie;
910 int ielen;
911
912 ie = ies->data;
913 ielen = ies->len;
914 while (ielen > 0) {
915 switch (ie[0]) {
916 case IEEE80211_ELEMID_VENDOR:
917 if (iswpaoui(ie))
918 ies->wpa_ie = ie;
919 else if (iswmeoui(ie))
920 ies->wme_ie = ie;
921 #ifdef IEEE80211_SUPPORT_SUPERG
922 else if (isatherosoui(ie))
923 ies->ath_ie = ie;
924 #endif
925 #ifdef IEEE80211_SUPPORT_TDMA
926 else if (istdmaoui(ie))
927 ies->tdma_ie = ie;
928 #endif
929 break;
930 case IEEE80211_ELEMID_RSN:
931 ies->rsn_ie = ie;
932 break;
933 case IEEE80211_ELEMID_HTCAP:
934 ies->htcap_ie = ie;
935 break;
936 #ifdef IEEE80211_SUPPORT_MESH
937 case IEEE80211_ELEMID_MESHID:
938 ies->meshid_ie = ie;
939 break;
940 #endif
941 }
942 ielen -= 2 + ie[1];
943 ie += 2 + ie[1];
944 }
945 }
946
947 /*
948 * Reclaim any resources in a node and reset any critical
949 * state. Typically nodes are free'd immediately after,
950 * but in some cases the storage may be reused so we need
951 * to insure consistent state (should probably fix that).
952 */
953 static void
954 node_cleanup(struct ieee80211_node *ni)
955 {
956 #define N(a) (sizeof(a)/sizeof(a[0]))
957 struct ieee80211vap *vap = ni->ni_vap;
958 struct ieee80211com *ic = ni->ni_ic;
959 int i;
960
961 /* NB: preserve ni_table */
962 if (ni->ni_flags & IEEE80211_NODE_PWR_MGT) {
963 if (vap->iv_opmode != IEEE80211_M_STA)
964 vap->iv_ps_sta--;
965 ni->ni_flags &= ~IEEE80211_NODE_PWR_MGT;
966 IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni,
967 "power save mode off, %u sta's in ps mode", vap->iv_ps_sta);
968 }
969 /*
970 * Cleanup any HT-related state.
971 */
972 if (ni->ni_flags & IEEE80211_NODE_HT)
973 ieee80211_ht_node_cleanup(ni);
974 #ifdef IEEE80211_SUPPORT_SUPERG
975 else if (ni->ni_ath_flags & IEEE80211_NODE_ATH)
976 ieee80211_ff_node_cleanup(ni);
977 #endif
978 #ifdef IEEE80211_SUPPORT_MESH
979 /*
980 * Cleanup any mesh-related state.
981 */
982 if (vap->iv_opmode == IEEE80211_M_MBSS)
983 ieee80211_mesh_node_cleanup(ni);
984 #endif
985 /*
986 * Clear any staging queue entries.
987 */
988 ieee80211_ageq_drain_node(&ic->ic_stageq, ni);
989
990 /*
991 * Clear AREF flag that marks the authorization refcnt bump
992 * has happened. This is probably not needed as the node
993 * should always be removed from the table so not found but
994 * do it just in case.
995 * Likewise clear the ASSOCID flag as these flags are intended
996 * to be managed in tandem.
997 */
998 ni->ni_flags &= ~(IEEE80211_NODE_AREF | IEEE80211_NODE_ASSOCID);
999
1000 /*
1001 * Drain power save queue and, if needed, clear TIM.
1002 */
1003 if (ieee80211_node_psq_drain(ni) != 0 && vap->iv_set_tim != NULL)
1004 vap->iv_set_tim(ni, 0);
1005
1006 ni->ni_associd = 0;
1007 if (ni->ni_challenge != NULL) {
1008 free(ni->ni_challenge, M_80211_NODE);
1009 ni->ni_challenge = NULL;
1010 }
1011 /*
1012 * Preserve SSID, WPA, and WME ie's so the bss node is
1013 * reusable during a re-auth/re-assoc state transition.
1014 * If we remove these data they will not be recreated
1015 * because they come from a probe-response or beacon frame
1016 * which cannot be expected prior to the association-response.
1017 * This should not be an issue when operating in other modes
1018 * as stations leaving always go through a full state transition
1019 * which will rebuild this state.
1020 *
1021 * XXX does this leave us open to inheriting old state?
1022 */
1023 for (i = 0; i < N(ni->ni_rxfrag); i++)
1024 if (ni->ni_rxfrag[i] != NULL) {
1025 m_freem(ni->ni_rxfrag[i]);
1026 ni->ni_rxfrag[i] = NULL;
1027 }
1028 /*
1029 * Must be careful here to remove any key map entry w/o a LOR.
1030 */
1031 ieee80211_node_delucastkey(ni);
1032 #undef N
1033 }
1034
1035 static void
1036 node_free(struct ieee80211_node *ni)
1037 {
1038 struct ieee80211com *ic = ni->ni_ic;
1039
1040 ieee80211_ratectl_node_deinit(ni);
1041 ic->ic_node_cleanup(ni);
1042 ieee80211_ies_cleanup(&ni->ni_ies);
1043 ieee80211_psq_cleanup(&ni->ni_psq);
1044 free(ni, M_80211_NODE);
1045 }
1046
1047 static void
1048 node_age(struct ieee80211_node *ni)
1049 {
1050 struct ieee80211vap *vap = ni->ni_vap;
1051
1052 IEEE80211_NODE_LOCK_ASSERT(&vap->iv_ic->ic_sta);
1053
1054 /*
1055 * Age frames on the power save queue.
1056 */
1057 if (ieee80211_node_psq_age(ni) != 0 &&
1058 ni->ni_psq.psq_len == 0 && vap->iv_set_tim != NULL)
1059 vap->iv_set_tim(ni, 0);
1060 /*
1061 * Age out HT resources (e.g. frames on the
1062 * A-MPDU reorder queues).
1063 */
1064 if (ni->ni_associd != 0 && (ni->ni_flags & IEEE80211_NODE_HT))
1065 ieee80211_ht_node_age(ni);
1066 }
1067
1068 static int8_t
1069 node_getrssi(const struct ieee80211_node *ni)
1070 {
1071 uint32_t avgrssi = ni->ni_avgrssi;
1072 int32_t rssi;
1073
1074 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER)
1075 return 0;
1076 rssi = IEEE80211_RSSI_GET(avgrssi);
1077 return rssi < 0 ? 0 : rssi > 127 ? 127 : rssi;
1078 }
1079
1080 static void
1081 node_getsignal(const struct ieee80211_node *ni, int8_t *rssi, int8_t *noise)
1082 {
1083 *rssi = node_getrssi(ni);
1084 *noise = ni->ni_noise;
1085 }
1086
1087 static void
1088 node_getmimoinfo(const struct ieee80211_node *ni,
1089 struct ieee80211_mimo_info *info)
1090 {
1091 /* XXX zero data? */
1092 }
1093
1094 struct ieee80211_node *
1095 ieee80211_alloc_node(struct ieee80211_node_table *nt,
1096 struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN])
1097 {
1098 struct ieee80211com *ic = nt->nt_ic;
1099 struct ieee80211_node *ni;
1100 int hash;
1101
1102 ni = ic->ic_node_alloc(vap, macaddr);
1103 if (ni == NULL) {
1104 vap->iv_stats.is_rx_nodealloc++;
1105 return NULL;
1106 }
1107
1108 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1109 "%s %p<%s> in %s table\n", __func__, ni,
1110 ether_sprintf(macaddr), nt->nt_name);
1111
1112 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr);
1113 hash = IEEE80211_NODE_HASH(ic, macaddr);
1114 ieee80211_node_initref(ni); /* mark referenced */
1115 ni->ni_chan = IEEE80211_CHAN_ANYC;
1116 ni->ni_authmode = IEEE80211_AUTH_OPEN;
1117 ni->ni_txpower = ic->ic_txpowlimit; /* max power */
1118 ni->ni_txparms = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)];
1119 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE);
1120 ni->ni_avgrssi = IEEE80211_RSSI_DUMMY_MARKER;
1121 ni->ni_inact_reload = nt->nt_inact_init;
1122 ni->ni_inact = ni->ni_inact_reload;
1123 ni->ni_ath_defkeyix = 0x7fff;
1124 ieee80211_psq_init(&ni->ni_psq, "unknown");
1125 #ifdef IEEE80211_SUPPORT_MESH
1126 if (vap->iv_opmode == IEEE80211_M_MBSS)
1127 ieee80211_mesh_node_init(vap, ni);
1128 #endif
1129 IEEE80211_NODE_LOCK(nt);
1130 TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list);
1131 LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash);
1132 ni->ni_table = nt;
1133 ni->ni_vap = vap;
1134 ni->ni_ic = ic;
1135 IEEE80211_NODE_UNLOCK(nt);
1136
1137 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni,
1138 "%s: inact_reload %u", __func__, ni->ni_inact_reload);
1139
1140 ieee80211_ratectl_node_init(ni);
1141
1142 return ni;
1143 }
1144
1145 /*
1146 * Craft a temporary node suitable for sending a management frame
1147 * to the specified station. We craft only as much state as we
1148 * need to do the work since the node will be immediately reclaimed
1149 * once the send completes.
1150 */
1151 struct ieee80211_node *
1152 ieee80211_tmp_node(struct ieee80211vap *vap,
1153 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1154 {
1155 struct ieee80211com *ic = vap->iv_ic;
1156 struct ieee80211_node *ni;
1157
1158 ni = ic->ic_node_alloc(vap, macaddr);
1159 if (ni != NULL) {
1160 struct ieee80211_node *bss = vap->iv_bss;
1161
1162 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1163 "%s %p<%s>\n", __func__, ni, ether_sprintf(macaddr));
1164
1165 ni->ni_table = NULL; /* NB: pedantic */
1166 ni->ni_ic = ic; /* NB: needed to set channel */
1167 ni->ni_vap = vap;
1168
1169 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr);
1170 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid);
1171 ieee80211_node_initref(ni); /* mark referenced */
1172 /* NB: required by ieee80211_fix_rate */
1173 ieee80211_node_set_chan(ni, bss->ni_chan);
1174 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey,
1175 IEEE80211_KEYIX_NONE);
1176 ni->ni_txpower = bss->ni_txpower;
1177 /* XXX optimize away */
1178 ieee80211_psq_init(&ni->ni_psq, "unknown");
1179
1180 ieee80211_ratectl_node_init(ni);
1181 } else {
1182 /* XXX msg */
1183 vap->iv_stats.is_rx_nodealloc++;
1184 }
1185 return ni;
1186 }
1187
1188 struct ieee80211_node *
1189 ieee80211_dup_bss(struct ieee80211vap *vap,
1190 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1191 {
1192 struct ieee80211com *ic = vap->iv_ic;
1193 struct ieee80211_node *ni;
1194
1195 ni = ieee80211_alloc_node(&ic->ic_sta, vap, macaddr);
1196 if (ni != NULL) {
1197 struct ieee80211_node *bss = vap->iv_bss;
1198 /*
1199 * Inherit from iv_bss.
1200 */
1201 copy_bss(ni, bss);
1202 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid);
1203 ieee80211_node_set_chan(ni, bss->ni_chan);
1204 }
1205 return ni;
1206 }
1207
1208 /*
1209 * Create a bss node for a legacy WDS vap. The far end does
1210 * not associate so we just create create a new node and
1211 * simulate an association. The caller is responsible for
1212 * installing the node as the bss node and handling any further
1213 * setup work like authorizing the port.
1214 */
1215 struct ieee80211_node *
1216 ieee80211_node_create_wds(struct ieee80211vap *vap,
1217 const uint8_t bssid[IEEE80211_ADDR_LEN], struct ieee80211_channel *chan)
1218 {
1219 struct ieee80211com *ic = vap->iv_ic;
1220 struct ieee80211_node *ni;
1221
1222 /* XXX check if node already in sta table? */
1223 ni = ieee80211_alloc_node(&ic->ic_sta, vap, bssid);
1224 if (ni != NULL) {
1225 ni->ni_wdsvap = vap;
1226 IEEE80211_ADDR_COPY(ni->ni_bssid, bssid);
1227 /*
1228 * Inherit any manually configured settings.
1229 */
1230 copy_bss(ni, vap->iv_bss);
1231 ieee80211_node_set_chan(ni, chan);
1232 /* NB: propagate ssid so available to WPA supplicant */
1233 ni->ni_esslen = vap->iv_des_ssid[0].len;
1234 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen);
1235 /* NB: no associd for peer */
1236 /*
1237 * There are no management frames to use to
1238 * discover neighbor capabilities, so blindly
1239 * propagate the local configuration.
1240 */
1241 if (vap->iv_flags & IEEE80211_F_WME)
1242 ni->ni_flags |= IEEE80211_NODE_QOS;
1243 #ifdef IEEE80211_SUPPORT_SUPERG
1244 if (vap->iv_flags & IEEE80211_F_FF)
1245 ni->ni_flags |= IEEE80211_NODE_FF;
1246 #endif
1247 if ((ic->ic_htcaps & IEEE80211_HTC_HT) &&
1248 (vap->iv_flags_ht & IEEE80211_FHT_HT)) {
1249 /*
1250 * Device is HT-capable and HT is enabled for
1251 * the vap; setup HT operation. On return
1252 * ni_chan will be adjusted to an HT channel.
1253 */
1254 ieee80211_ht_wds_init(ni);
1255 } else {
1256 struct ieee80211_channel *c = ni->ni_chan;
1257 /*
1258 * Force a legacy channel to be used.
1259 */
1260 c = ieee80211_find_channel(ic,
1261 c->ic_freq, c->ic_flags &~ IEEE80211_CHAN_HT);
1262 KASSERT(c != NULL, ("no legacy channel, %u/%x",
1263 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags));
1264 ni->ni_chan = c;
1265 }
1266 }
1267 return ni;
1268 }
1269
1270 struct ieee80211_node *
1271 #ifdef IEEE80211_DEBUG_REFCNT
1272 ieee80211_find_node_locked_debug(struct ieee80211_node_table *nt,
1273 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line)
1274 #else
1275 ieee80211_find_node_locked(struct ieee80211_node_table *nt,
1276 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1277 #endif
1278 {
1279 struct ieee80211_node *ni;
1280 int hash;
1281
1282 IEEE80211_NODE_LOCK_ASSERT(nt);
1283
1284 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr);
1285 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) {
1286 if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) {
1287 ieee80211_ref_node(ni); /* mark referenced */
1288 #ifdef IEEE80211_DEBUG_REFCNT
1289 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1290 "%s (%s:%u) %p<%s> refcnt %d\n", __func__,
1291 func, line,
1292 ni, ether_sprintf(ni->ni_macaddr),
1293 ieee80211_node_refcnt(ni));
1294 #endif
1295 return ni;
1296 }
1297 }
1298 return NULL;
1299 }
1300
1301 struct ieee80211_node *
1302 #ifdef IEEE80211_DEBUG_REFCNT
1303 ieee80211_find_node_debug(struct ieee80211_node_table *nt,
1304 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line)
1305 #else
1306 ieee80211_find_node(struct ieee80211_node_table *nt,
1307 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1308 #endif
1309 {
1310 struct ieee80211_node *ni;
1311
1312 IEEE80211_NODE_LOCK(nt);
1313 ni = ieee80211_find_node_locked(nt, macaddr);
1314 IEEE80211_NODE_UNLOCK(nt);
1315 return ni;
1316 }
1317
1318 struct ieee80211_node *
1319 #ifdef IEEE80211_DEBUG_REFCNT
1320 ieee80211_find_vap_node_locked_debug(struct ieee80211_node_table *nt,
1321 const struct ieee80211vap *vap,
1322 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line)
1323 #else
1324 ieee80211_find_vap_node_locked(struct ieee80211_node_table *nt,
1325 const struct ieee80211vap *vap,
1326 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1327 #endif
1328 {
1329 struct ieee80211_node *ni;
1330 int hash;
1331
1332 IEEE80211_NODE_LOCK_ASSERT(nt);
1333
1334 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr);
1335 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) {
1336 if (ni->ni_vap == vap &&
1337 IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) {
1338 ieee80211_ref_node(ni); /* mark referenced */
1339 #ifdef IEEE80211_DEBUG_REFCNT
1340 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1341 "%s (%s:%u) %p<%s> refcnt %d\n", __func__,
1342 func, line,
1343 ni, ether_sprintf(ni->ni_macaddr),
1344 ieee80211_node_refcnt(ni));
1345 #endif
1346 return ni;
1347 }
1348 }
1349 return NULL;
1350 }
1351
1352 struct ieee80211_node *
1353 #ifdef IEEE80211_DEBUG_REFCNT
1354 ieee80211_find_vap_node_debug(struct ieee80211_node_table *nt,
1355 const struct ieee80211vap *vap,
1356 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line)
1357 #else
1358 ieee80211_find_vap_node(struct ieee80211_node_table *nt,
1359 const struct ieee80211vap *vap,
1360 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1361 #endif
1362 {
1363 struct ieee80211_node *ni;
1364
1365 IEEE80211_NODE_LOCK(nt);
1366 ni = ieee80211_find_vap_node_locked(nt, vap, macaddr);
1367 IEEE80211_NODE_UNLOCK(nt);
1368 return ni;
1369 }
1370
1371 /*
1372 * Fake up a node; this handles node discovery in adhoc mode.
1373 * Note that for the driver's benefit we we treat this like
1374 * an association so the driver has an opportunity to setup
1375 * it's private state.
1376 */
1377 struct ieee80211_node *
1378 ieee80211_fakeup_adhoc_node(struct ieee80211vap *vap,
1379 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1380 {
1381 struct ieee80211_node *ni;
1382
1383 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1384 "%s: mac<%s>\n", __func__, ether_sprintf(macaddr));
1385 ni = ieee80211_dup_bss(vap, macaddr);
1386 if (ni != NULL) {
1387 struct ieee80211com *ic = vap->iv_ic;
1388
1389 /* XXX no rate negotiation; just dup */
1390 ni->ni_rates = vap->iv_bss->ni_rates;
1391 if (ieee80211_iserp_rateset(&ni->ni_rates))
1392 ni->ni_flags |= IEEE80211_NODE_ERP;
1393 if (vap->iv_opmode == IEEE80211_M_AHDEMO) {
1394 /*
1395 * In adhoc demo mode there are no management
1396 * frames to use to discover neighbor capabilities,
1397 * so blindly propagate the local configuration
1398 * so we can do interesting things (e.g. use
1399 * WME to disable ACK's).
1400 */
1401 if (vap->iv_flags & IEEE80211_F_WME)
1402 ni->ni_flags |= IEEE80211_NODE_QOS;
1403 #ifdef IEEE80211_SUPPORT_SUPERG
1404 if (vap->iv_flags & IEEE80211_F_FF)
1405 ni->ni_flags |= IEEE80211_NODE_FF;
1406 #endif
1407 }
1408 ieee80211_node_setuptxparms(ni);
1409 ieee80211_ratectl_node_init(ni);
1410 if (ic->ic_newassoc != NULL)
1411 ic->ic_newassoc(ni, 1);
1412 /* XXX not right for 802.1x/WPA */
1413 ieee80211_node_authorize(ni);
1414 }
1415 return ni;
1416 }
1417
1418 void
1419 ieee80211_init_neighbor(struct ieee80211_node *ni,
1420 const struct ieee80211_frame *wh,
1421 const struct ieee80211_scanparams *sp)
1422 {
1423 ni->ni_esslen = sp->ssid[1];
1424 memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]);
1425 IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3);
1426 memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp));
1427 ni->ni_intval = sp->bintval;
1428 ni->ni_capinfo = sp->capinfo;
1429 ni->ni_chan = ni->ni_ic->ic_curchan;
1430 ni->ni_fhdwell = sp->fhdwell;
1431 ni->ni_fhindex = sp->fhindex;
1432 ni->ni_erp = sp->erp;
1433 ni->ni_timoff = sp->timoff;
1434 #ifdef IEEE80211_SUPPORT_MESH
1435 if (ni->ni_vap->iv_opmode == IEEE80211_M_MBSS)
1436 ieee80211_mesh_init_neighbor(ni, wh, sp);
1437 #endif
1438 if (ieee80211_ies_init(&ni->ni_ies, sp->ies, sp->ies_len)) {
1439 ieee80211_ies_expand(&ni->ni_ies);
1440 if (ni->ni_ies.wme_ie != NULL)
1441 ni->ni_flags |= IEEE80211_NODE_QOS;
1442 else
1443 ni->ni_flags &= ~IEEE80211_NODE_QOS;
1444 #ifdef IEEE80211_SUPPORT_SUPERG
1445 if (ni->ni_ies.ath_ie != NULL)
1446 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie);
1447 #endif
1448 }
1449
1450 /* NB: must be after ni_chan is setup */
1451 ieee80211_setup_rates(ni, sp->rates, sp->xrates,
1452 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE |
1453 IEEE80211_F_DONEGO | IEEE80211_F_DODEL);
1454 }
1455
1456 /*
1457 * Do node discovery in adhoc mode on receipt of a beacon
1458 * or probe response frame. Note that for the driver's
1459 * benefit we we treat this like an association so the
1460 * driver has an opportunity to setup it's private state.
1461 */
1462 struct ieee80211_node *
1463 ieee80211_add_neighbor(struct ieee80211vap *vap,
1464 const struct ieee80211_frame *wh,
1465 const struct ieee80211_scanparams *sp)
1466 {
1467 struct ieee80211_node *ni;
1468
1469 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1470 "%s: mac<%s>\n", __func__, ether_sprintf(wh->i_addr2));
1471 ni = ieee80211_dup_bss(vap, wh->i_addr2);/* XXX alloc_node? */
1472 if (ni != NULL) {
1473 struct ieee80211com *ic = vap->iv_ic;
1474
1475 ieee80211_init_neighbor(ni, wh, sp);
1476 if (ieee80211_iserp_rateset(&ni->ni_rates))
1477 ni->ni_flags |= IEEE80211_NODE_ERP;
1478 ieee80211_node_setuptxparms(ni);
1479 ieee80211_ratectl_node_init(ni);
1480 if (ic->ic_newassoc != NULL)
1481 ic->ic_newassoc(ni, 1);
1482 /* XXX not right for 802.1x/WPA */
1483 ieee80211_node_authorize(ni);
1484 }
1485 return ni;
1486 }
1487
1488 #define IS_PROBEREQ(wh) \
1489 ((wh->i_fc[0] & (IEEE80211_FC0_TYPE_MASK|IEEE80211_FC0_SUBTYPE_MASK)) \
1490 == (IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ))
1491 #define IS_BCAST_PROBEREQ(wh) \
1492 (IS_PROBEREQ(wh) && IEEE80211_IS_MULTICAST( \
1493 ((const struct ieee80211_frame *)(wh))->i_addr3))
1494
1495 static __inline struct ieee80211_node *
1496 _find_rxnode(struct ieee80211_node_table *nt,
1497 const struct ieee80211_frame_min *wh)
1498 {
1499 if (IS_BCAST_PROBEREQ(wh))
1500 return NULL; /* spam bcast probe req to all vap's */
1501 return ieee80211_find_node_locked(nt, wh->i_addr2);
1502 }
1503
1504 /*
1505 * Locate the node for sender, track state, and then pass the
1506 * (referenced) node up to the 802.11 layer for its use. Note
1507 * we can return NULL if the sender is not in the table.
1508 */
1509 struct ieee80211_node *
1510 #ifdef IEEE80211_DEBUG_REFCNT
1511 ieee80211_find_rxnode_debug(struct ieee80211com *ic,
1512 const struct ieee80211_frame_min *wh, const char *func, int line)
1513 #else
1514 ieee80211_find_rxnode(struct ieee80211com *ic,
1515 const struct ieee80211_frame_min *wh)
1516 #endif
1517 {
1518 struct ieee80211_node_table *nt;
1519 struct ieee80211_node *ni;
1520
1521 nt = &ic->ic_sta;
1522 IEEE80211_NODE_LOCK(nt);
1523 ni = _find_rxnode(nt, wh);
1524 IEEE80211_NODE_UNLOCK(nt);
1525
1526 return ni;
1527 }
1528
1529 /*
1530 * Like ieee80211_find_rxnode but use the supplied h/w
1531 * key index as a hint to locate the node in the key
1532 * mapping table. If an entry is present at the key
1533 * index we return it; otherwise do a normal lookup and
1534 * update the mapping table if the station has a unicast
1535 * key assigned to it.
1536 */
1537 struct ieee80211_node *
1538 #ifdef IEEE80211_DEBUG_REFCNT
1539 ieee80211_find_rxnode_withkey_debug(struct ieee80211com *ic,
1540 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix,
1541 const char *func, int line)
1542 #else
1543 ieee80211_find_rxnode_withkey(struct ieee80211com *ic,
1544 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix)
1545 #endif
1546 {
1547 struct ieee80211_node_table *nt;
1548 struct ieee80211_node *ni;
1549
1550 nt = &ic->ic_sta;
1551 IEEE80211_NODE_LOCK(nt);
1552 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax)
1553 ni = nt->nt_keyixmap[keyix];
1554 else
1555 ni = NULL;
1556 if (ni == NULL) {
1557 ni = _find_rxnode(nt, wh);
1558 if (ni != NULL && nt->nt_keyixmap != NULL) {
1559 /*
1560 * If the station has a unicast key cache slot
1561 * assigned update the key->node mapping table.
1562 */
1563 keyix = ni->ni_ucastkey.wk_rxkeyix;
1564 /* XXX can keyixmap[keyix] != NULL? */
1565 if (keyix < nt->nt_keyixmax &&
1566 nt->nt_keyixmap[keyix] == NULL) {
1567 IEEE80211_DPRINTF(ni->ni_vap,
1568 IEEE80211_MSG_NODE,
1569 "%s: add key map entry %p<%s> refcnt %d\n",
1570 __func__, ni, ether_sprintf(ni->ni_macaddr),
1571 ieee80211_node_refcnt(ni)+1);
1572 nt->nt_keyixmap[keyix] = ieee80211_ref_node(ni);
1573 }
1574 }
1575 } else {
1576 if (IS_BCAST_PROBEREQ(wh))
1577 ni = NULL; /* spam bcast probe req to all vap's */
1578 else
1579 ieee80211_ref_node(ni);
1580 }
1581 IEEE80211_NODE_UNLOCK(nt);
1582
1583 return ni;
1584 }
1585 #undef IS_BCAST_PROBEREQ
1586 #undef IS_PROBEREQ
1587
1588 /*
1589 * Return a reference to the appropriate node for sending
1590 * a data frame. This handles node discovery in adhoc networks.
1591 */
1592 struct ieee80211_node *
1593 #ifdef IEEE80211_DEBUG_REFCNT
1594 ieee80211_find_txnode_debug(struct ieee80211vap *vap,
1595 const uint8_t macaddr[IEEE80211_ADDR_LEN],
1596 const char *func, int line)
1597 #else
1598 ieee80211_find_txnode(struct ieee80211vap *vap,
1599 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1600 #endif
1601 {
1602 struct ieee80211_node_table *nt = &vap->iv_ic->ic_sta;
1603 struct ieee80211_node *ni;
1604
1605 /*
1606 * The destination address should be in the node table
1607 * unless this is a multicast/broadcast frame. We can
1608 * also optimize station mode operation, all frames go
1609 * to the bss node.
1610 */
1611 /* XXX can't hold lock across dup_bss 'cuz of recursive locking */
1612 IEEE80211_NODE_LOCK(nt);
1613 if (vap->iv_opmode == IEEE80211_M_STA ||
1614 vap->iv_opmode == IEEE80211_M_WDS ||
1615 IEEE80211_IS_MULTICAST(macaddr))
1616 ni = ieee80211_ref_node(vap->iv_bss);
1617 else
1618 ni = ieee80211_find_node_locked(nt, macaddr);
1619 IEEE80211_NODE_UNLOCK(nt);
1620
1621 if (ni == NULL) {
1622 if (vap->iv_opmode == IEEE80211_M_IBSS ||
1623 vap->iv_opmode == IEEE80211_M_AHDEMO) {
1624 /*
1625 * In adhoc mode cons up a node for the destination.
1626 * Note that we need an additional reference for the
1627 * caller to be consistent with
1628 * ieee80211_find_node_locked.
1629 */
1630 ni = ieee80211_fakeup_adhoc_node(vap, macaddr);
1631 if (ni != NULL)
1632 (void) ieee80211_ref_node(ni);
1633 } else {
1634 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, macaddr,
1635 "no node, discard frame (%s)", __func__);
1636 vap->iv_stats.is_tx_nonode++;
1637 }
1638 }
1639 return ni;
1640 }
1641
1642 static void
1643 _ieee80211_free_node(struct ieee80211_node *ni)
1644 {
1645 struct ieee80211_node_table *nt = ni->ni_table;
1646
1647 /*
1648 * NB: careful about referencing the vap as it may be
1649 * gone if the last reference was held by a driver.
1650 * We know the com will always be present so it's safe
1651 * to use ni_ic below to reclaim resources.
1652 */
1653 #if 0
1654 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1655 "%s %p<%s> in %s table\n", __func__, ni,
1656 ether_sprintf(ni->ni_macaddr),
1657 nt != NULL ? nt->nt_name : "<gone>");
1658 #endif
1659 if (ni->ni_associd != 0) {
1660 struct ieee80211vap *vap = ni->ni_vap;
1661 if (vap->iv_aid_bitmap != NULL)
1662 IEEE80211_AID_CLR(vap, ni->ni_associd);
1663 }
1664 if (nt != NULL) {
1665 TAILQ_REMOVE(&nt->nt_node, ni, ni_list);
1666 LIST_REMOVE(ni, ni_hash);
1667 }
1668 ni->ni_ic->ic_node_free(ni);
1669 }
1670
1671 void
1672 #ifdef IEEE80211_DEBUG_REFCNT
1673 ieee80211_free_node_debug(struct ieee80211_node *ni, const char *func, int line)
1674 #else
1675 ieee80211_free_node(struct ieee80211_node *ni)
1676 #endif
1677 {
1678 struct ieee80211_node_table *nt = ni->ni_table;
1679
1680 #ifdef IEEE80211_DEBUG_REFCNT
1681 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1682 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni,
1683 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1);
1684 #endif
1685 if (nt != NULL) {
1686 IEEE80211_NODE_LOCK(nt);
1687 if (ieee80211_node_dectestref(ni)) {
1688 /*
1689 * Last reference, reclaim state.
1690 */
1691 _ieee80211_free_node(ni);
1692 } else if (ieee80211_node_refcnt(ni) == 1 &&
1693 nt->nt_keyixmap != NULL) {
1694 ieee80211_keyix keyix;
1695 /*
1696 * Check for a last reference in the key mapping table.
1697 */
1698 keyix = ni->ni_ucastkey.wk_rxkeyix;
1699 if (keyix < nt->nt_keyixmax &&
1700 nt->nt_keyixmap[keyix] == ni) {
1701 IEEE80211_DPRINTF(ni->ni_vap,
1702 IEEE80211_MSG_NODE,
1703 "%s: %p<%s> clear key map entry", __func__,
1704 ni, ether_sprintf(ni->ni_macaddr));
1705 nt->nt_keyixmap[keyix] = NULL;
1706 ieee80211_node_decref(ni); /* XXX needed? */
1707 _ieee80211_free_node(ni);
1708 }
1709 }
1710 IEEE80211_NODE_UNLOCK(nt);
1711 } else {
1712 if (ieee80211_node_dectestref(ni))
1713 _ieee80211_free_node(ni);
1714 }
1715 }
1716
1717 /*
1718 * Reclaim a unicast key and clear any key cache state.
1719 */
1720 int
1721 ieee80211_node_delucastkey(struct ieee80211_node *ni)
1722 {
1723 struct ieee80211com *ic = ni->ni_ic;
1724 struct ieee80211_node_table *nt = &ic->ic_sta;
1725 struct ieee80211_node *nikey;
1726 ieee80211_keyix keyix;
1727 int isowned, status;
1728
1729 /*
1730 * NB: We must beware of LOR here; deleting the key
1731 * can cause the crypto layer to block traffic updates
1732 * which can generate a LOR against the node table lock;
1733 * grab it here and stash the key index for our use below.
1734 *
1735 * Must also beware of recursion on the node table lock.
1736 * When called from node_cleanup we may already have
1737 * the node table lock held. Unfortunately there's no
1738 * way to separate out this path so we must do this
1739 * conditionally.
1740 */
1741 isowned = IEEE80211_NODE_IS_LOCKED(nt);
1742 if (!isowned)
1743 IEEE80211_NODE_LOCK(nt);
1744 nikey = NULL;
1745 status = 1; /* NB: success */
1746 if (ni->ni_ucastkey.wk_keyix != IEEE80211_KEYIX_NONE) {
1747 keyix = ni->ni_ucastkey.wk_rxkeyix;
1748 status = ieee80211_crypto_delkey(ni->ni_vap, &ni->ni_ucastkey);
1749 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) {
1750 nikey = nt->nt_keyixmap[keyix];
1751 nt->nt_keyixmap[keyix] = NULL;
1752 }
1753 }
1754 if (!isowned)
1755 IEEE80211_NODE_UNLOCK(nt);
1756
1757 if (nikey != NULL) {
1758 KASSERT(nikey == ni,
1759 ("key map out of sync, ni %p nikey %p", ni, nikey));
1760 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1761 "%s: delete key map entry %p<%s> refcnt %d\n",
1762 __func__, ni, ether_sprintf(ni->ni_macaddr),
1763 ieee80211_node_refcnt(ni)-1);
1764 ieee80211_free_node(ni);
1765 }
1766 return status;
1767 }
1768
1769 /*
1770 * Reclaim a node. If this is the last reference count then
1771 * do the normal free work. Otherwise remove it from the node
1772 * table and mark it gone by clearing the back-reference.
1773 */
1774 static void
1775 node_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni)
1776 {
1777 ieee80211_keyix keyix;
1778
1779 IEEE80211_NODE_LOCK_ASSERT(nt);
1780
1781 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1782 "%s: remove %p<%s> from %s table, refcnt %d\n",
1783 __func__, ni, ether_sprintf(ni->ni_macaddr),
1784 nt->nt_name, ieee80211_node_refcnt(ni)-1);
1785 /*
1786 * Clear any entry in the unicast key mapping table.
1787 * We need to do it here so rx lookups don't find it
1788 * in the mapping table even if it's not in the hash
1789 * table. We cannot depend on the mapping table entry
1790 * being cleared because the node may not be free'd.
1791 */
1792 keyix = ni->ni_ucastkey.wk_rxkeyix;
1793 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax &&
1794 nt->nt_keyixmap[keyix] == ni) {
1795 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1796 "%s: %p<%s> clear key map entry %u\n",
1797 __func__, ni, ether_sprintf(ni->ni_macaddr), keyix);
1798 nt->nt_keyixmap[keyix] = NULL;
1799 ieee80211_node_decref(ni); /* NB: don't need free */
1800 }
1801 if (!ieee80211_node_dectestref(ni)) {
1802 /*
1803 * Other references are present, just remove the
1804 * node from the table so it cannot be found. When
1805 * the references are dropped storage will be
1806 * reclaimed.
1807 */
1808 TAILQ_REMOVE(&nt->nt_node, ni, ni_list);
1809 LIST_REMOVE(ni, ni_hash);
1810 ni->ni_table = NULL; /* clear reference */
1811 } else
1812 _ieee80211_free_node(ni);
1813 }
1814
1815 /*
1816 * Node table support.
1817 */
1818
1819 static void
1820 ieee80211_node_table_init(struct ieee80211com *ic,
1821 struct ieee80211_node_table *nt,
1822 const char *name, int inact, int keyixmax)
1823 {
1824 struct ifnet *ifp = ic->ic_ifp;
1825
1826 nt->nt_ic = ic;
1827 IEEE80211_NODE_LOCK_INIT(nt, ifp->if_xname);
1828 IEEE80211_NODE_ITERATE_LOCK_INIT(nt, ifp->if_xname);
1829 TAILQ_INIT(&nt->nt_node);
1830 nt->nt_name = name;
1831 nt->nt_scangen = 1;
1832 nt->nt_inact_init = inact;
1833 nt->nt_keyixmax = keyixmax;
1834 if (nt->nt_keyixmax > 0) {
1835 nt->nt_keyixmap = (struct ieee80211_node **) malloc(
1836 keyixmax * sizeof(struct ieee80211_node *),
1837 M_80211_NODE, M_NOWAIT | M_ZERO);
1838 if (nt->nt_keyixmap == NULL)
1839 if_printf(ic->ic_ifp,
1840 "Cannot allocate key index map with %u entries\n",
1841 keyixmax);
1842 } else
1843 nt->nt_keyixmap = NULL;
1844 }
1845
1846 static void
1847 ieee80211_node_table_reset(struct ieee80211_node_table *nt,
1848 struct ieee80211vap *match)
1849 {
1850 struct ieee80211_node *ni, *next;
1851
1852 IEEE80211_NODE_LOCK(nt);
1853 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) {
1854 if (match != NULL && ni->ni_vap != match)
1855 continue;
1856 /* XXX can this happen? if so need's work */
1857 if (ni->ni_associd != 0) {
1858 struct ieee80211vap *vap = ni->ni_vap;
1859
1860 if (vap->iv_auth->ia_node_leave != NULL)
1861 vap->iv_auth->ia_node_leave(ni);
1862 if (vap->iv_aid_bitmap != NULL)
1863 IEEE80211_AID_CLR(vap, ni->ni_associd);
1864 }
1865 ni->ni_wdsvap = NULL; /* clear reference */
1866 node_reclaim(nt, ni);
1867 }
1868 if (match != NULL && match->iv_opmode == IEEE80211_M_WDS) {
1869 /*
1870 * Make a separate pass to clear references to this vap
1871 * held by DWDS entries. They will not be matched above
1872 * because ni_vap will point to the ap vap but we still
1873 * need to clear ni_wdsvap when the WDS vap is destroyed
1874 * and/or reset.
1875 */
1876 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next)
1877 if (ni->ni_wdsvap == match)
1878 ni->ni_wdsvap = NULL;
1879 }
1880 IEEE80211_NODE_UNLOCK(nt);
1881 }
1882
1883 static void
1884 ieee80211_node_table_cleanup(struct ieee80211_node_table *nt)
1885 {
1886 ieee80211_node_table_reset(nt, NULL);
1887 if (nt->nt_keyixmap != NULL) {
1888 #ifdef DIAGNOSTIC
1889 /* XXX verify all entries are NULL */
1890 int i;
1891 for (i = 0; i < nt->nt_keyixmax; i++)
1892 if (nt->nt_keyixmap[i] != NULL)
1893 printf("%s: %s[%u] still active\n", __func__,
1894 nt->nt_name, i);
1895 #endif
1896 free(nt->nt_keyixmap, M_80211_NODE);
1897 nt->nt_keyixmap = NULL;
1898 }
1899 IEEE80211_NODE_ITERATE_LOCK_DESTROY(nt);
1900 IEEE80211_NODE_LOCK_DESTROY(nt);
1901 }
1902
1903 /*
1904 * Timeout inactive stations and do related housekeeping.
1905 * Note that we cannot hold the node lock while sending a
1906 * frame as this would lead to a LOR. Instead we use a
1907 * generation number to mark nodes that we've scanned and
1908 * drop the lock and restart a scan if we have to time out
1909 * a node. Since we are single-threaded by virtue of
1910 * controlling the inactivity timer we can be sure this will
1911 * process each node only once.
1912 */
1913 static void
1914 ieee80211_timeout_stations(struct ieee80211com *ic)
1915 {
1916 struct ieee80211_node_table *nt = &ic->ic_sta;
1917 struct ieee80211vap *vap;
1918 struct ieee80211_node *ni;
1919 int gen = 0;
1920
1921 IEEE80211_NODE_ITERATE_LOCK(nt);
1922 gen = ++nt->nt_scangen;
1923 restart:
1924 IEEE80211_NODE_LOCK(nt);
1925 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) {
1926 if (ni->ni_scangen == gen) /* previously handled */
1927 continue;
1928 ni->ni_scangen = gen;
1929 /*
1930 * Ignore entries for which have yet to receive an
1931 * authentication frame. These are transient and
1932 * will be reclaimed when the last reference to them
1933 * goes away (when frame xmits complete).
1934 */
1935 vap = ni->ni_vap;
1936 /*
1937 * Only process stations when in RUN state. This
1938 * insures, for example, that we don't timeout an
1939 * inactive station during CAC. Note that CSA state
1940 * is actually handled in ieee80211_node_timeout as
1941 * it applies to more than timeout processing.
1942 */
1943 if (vap->iv_state != IEEE80211_S_RUN)
1944 continue;
1945 /* XXX can vap be NULL? */
1946 if ((vap->iv_opmode == IEEE80211_M_HOSTAP ||
1947 vap->iv_opmode == IEEE80211_M_STA) &&
1948 (ni->ni_flags & IEEE80211_NODE_AREF) == 0)
1949 continue;
1950 /*
1951 * Free fragment if not needed anymore
1952 * (last fragment older than 1s).
1953 * XXX doesn't belong here, move to node_age
1954 */
1955 if (ni->ni_rxfrag[0] != NULL &&
1956 ticks > ni->ni_rxfragstamp + hz) {
1957 m_freem(ni->ni_rxfrag[0]);
1958 ni->ni_rxfrag[0] = NULL;
1959 }
1960 if (ni->ni_inact > 0) {
1961 ni->ni_inact--;
1962 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni,
1963 "%s: inact %u inact_reload %u nrates %u",
1964 __func__, ni->ni_inact, ni->ni_inact_reload,
1965 ni->ni_rates.rs_nrates);
1966 }
1967 /*
1968 * Special case ourself; we may be idle for extended periods
1969 * of time and regardless reclaiming our state is wrong.
1970 * XXX run ic_node_age
1971 */
1972 if (ni == vap->iv_bss)
1973 continue;
1974 if (ni->ni_associd != 0 ||
1975 (vap->iv_opmode == IEEE80211_M_IBSS ||
1976 vap->iv_opmode == IEEE80211_M_AHDEMO)) {
1977 /*
1978 * Age/drain resources held by the station.
1979 */
1980 ic->ic_node_age(ni);
1981 /*
1982 * Probe the station before time it out. We
1983 * send a null data frame which may not be
1984 * universally supported by drivers (need it
1985 * for ps-poll support so it should be...).
1986 *
1987 * XXX don't probe the station unless we've
1988 * received a frame from them (and have
1989 * some idea of the rates they are capable
1990 * of); this will get fixed more properly
1991 * soon with better handling of the rate set.
1992 */
1993 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) &&
1994 (0 < ni->ni_inact &&
1995 ni->ni_inact <= vap->iv_inact_probe) &&
1996 ni->ni_rates.rs_nrates != 0) {
1997 IEEE80211_NOTE(vap,
1998 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE,
1999 ni, "%s",
2000 "probe station due to inactivity");
2001 /*
2002 * Grab a reference before unlocking the table
2003 * so the node cannot be reclaimed before we
2004 * send the frame. ieee80211_send_nulldata
2005 * understands we've done this and reclaims the
2006 * ref for us as needed.
2007 */
2008 ieee80211_ref_node(ni);
2009 IEEE80211_NODE_UNLOCK(nt);
2010 ieee80211_send_nulldata(ni);
2011 /* XXX stat? */
2012 goto restart;
2013 }
2014 }
2015 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) &&
2016 ni->ni_inact <= 0) {
2017 IEEE80211_NOTE(vap,
2018 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, ni,
2019 "station timed out due to inactivity "
2020 "(refcnt %u)", ieee80211_node_refcnt(ni));
2021 /*
2022 * Send a deauthenticate frame and drop the station.
2023 * This is somewhat complicated due to reference counts
2024 * and locking. At this point a station will typically
2025 * have a reference count of 1. ieee80211_node_leave
2026 * will do a "free" of the node which will drop the
2027 * reference count. But in the meantime a reference
2028 * wil be held by the deauth frame. The actual reclaim
2029 * of the node will happen either after the tx is
2030 * completed or by ieee80211_node_leave.
2031 *
2032 * Separately we must drop the node lock before sending
2033 * in case the driver takes a lock, as this can result
2034 * in a LOR between the node lock and the driver lock.
2035 */
2036 ieee80211_ref_node(ni);
2037 IEEE80211_NODE_UNLOCK(nt);
2038 if (ni->ni_associd != 0) {
2039 IEEE80211_SEND_MGMT(ni,
2040 IEEE80211_FC0_SUBTYPE_DEAUTH,
2041 IEEE80211_REASON_AUTH_EXPIRE);
2042 }
2043 ieee80211_node_leave(ni);
2044 ieee80211_free_node(ni);
2045 vap->iv_stats.is_node_timeout++;
2046 goto restart;
2047 }
2048 }
2049 IEEE80211_NODE_UNLOCK(nt);
2050
2051 IEEE80211_NODE_ITERATE_UNLOCK(nt);
2052 }
2053
2054 /*
2055 * Aggressively reclaim resources. This should be used
2056 * only in a critical situation to reclaim mbuf resources.
2057 */
2058 void
2059 ieee80211_drain(struct ieee80211com *ic)
2060 {
2061 struct ieee80211_node_table *nt = &ic->ic_sta;
2062 struct ieee80211vap *vap;
2063 struct ieee80211_node *ni;
2064
2065 IEEE80211_NODE_LOCK(nt);
2066 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) {
2067 /*
2068 * Ignore entries for which have yet to receive an
2069 * authentication frame. These are transient and
2070 * will be reclaimed when the last reference to them
2071 * goes away (when frame xmits complete).
2072 */
2073 vap = ni->ni_vap;
2074 /*
2075 * Only process stations when in RUN state. This
2076 * insures, for example, that we don't timeout an
2077 * inactive station during CAC. Note that CSA state
2078 * is actually handled in ieee80211_node_timeout as
2079 * it applies to more than timeout processing.
2080 */
2081 if (vap->iv_state != IEEE80211_S_RUN)
2082 continue;
2083 /* XXX can vap be NULL? */
2084 if ((vap->iv_opmode == IEEE80211_M_HOSTAP ||
2085 vap->iv_opmode == IEEE80211_M_STA) &&
2086 (ni->ni_flags & IEEE80211_NODE_AREF) == 0)
2087 continue;
2088 /*
2089 * Free fragments.
2090 * XXX doesn't belong here, move to node_drain
2091 */
2092 if (ni->ni_rxfrag[0] != NULL) {
2093 m_freem(ni->ni_rxfrag[0]);
2094 ni->ni_rxfrag[0] = NULL;
2095 }
2096 /*
2097 * Drain resources held by the station.
2098 */
2099 ic->ic_node_drain(ni);
2100 }
2101 IEEE80211_NODE_UNLOCK(nt);
2102 }
2103
2104 /*
2105 * Per-ieee80211com inactivity timer callback.
2106 */
2107 void
2108 ieee80211_node_timeout(void *arg)
2109 {
2110 struct ieee80211com *ic = arg;
2111
2112 /*
2113 * Defer timeout processing if a channel switch is pending.
2114 * We typically need to be mute so not doing things that
2115 * might generate frames is good to handle in one place.
2116 * Supressing the station timeout processing may extend the
2117 * lifetime of inactive stations (by not decrementing their
2118 * idle counters) but this should be ok unless the CSA is
2119 * active for an unusually long time.
2120 */
2121 if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) {
2122 ieee80211_scan_timeout(ic);
2123 ieee80211_timeout_stations(ic);
2124 ieee80211_ageq_age(&ic->ic_stageq, IEEE80211_INACT_WAIT);
2125
2126 IEEE80211_LOCK(ic);
2127 ieee80211_erp_timeout(ic);
2128 ieee80211_ht_timeout(ic);
2129 IEEE80211_UNLOCK(ic);
2130 }
2131 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz,
2132 ieee80211_node_timeout, ic);
2133 }
2134
2135 void
2136 ieee80211_iterate_nodes(struct ieee80211_node_table *nt,
2137 ieee80211_iter_func *f, void *arg)
2138 {
2139 struct ieee80211_node *ni;
2140 u_int gen;
2141
2142 IEEE80211_NODE_ITERATE_LOCK(nt);
2143 gen = ++nt->nt_scangen;
2144 restart:
2145 IEEE80211_NODE_LOCK(nt);
2146 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) {
2147 if (ni->ni_scangen != gen) {
2148 ni->ni_scangen = gen;
2149 (void) ieee80211_ref_node(ni);
2150 IEEE80211_NODE_UNLOCK(nt);
2151 (*f)(arg, ni);
2152 ieee80211_free_node(ni);
2153 goto restart;
2154 }
2155 }
2156 IEEE80211_NODE_UNLOCK(nt);
2157
2158 IEEE80211_NODE_ITERATE_UNLOCK(nt);
2159 }
2160
2161 void
2162 ieee80211_dump_node(struct ieee80211_node_table *nt, struct ieee80211_node *ni)
2163 {
2164 printf("0x%p: mac %s refcnt %d\n", ni,
2165 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni));
2166 printf("\tscangen %u authmode %u flags 0x%x\n",
2167 ni->ni_scangen, ni->ni_authmode, ni->ni_flags);
2168 printf("\tassocid 0x%x txpower %u vlan %u\n",
2169 ni->ni_associd, ni->ni_txpower, ni->ni_vlan);
2170 printf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n",
2171 ni->ni_txseqs[IEEE80211_NONQOS_TID],
2172 ni->ni_rxseqs[IEEE80211_NONQOS_TID] >> IEEE80211_SEQ_SEQ_SHIFT,
2173 ni->ni_rxseqs[IEEE80211_NONQOS_TID] & IEEE80211_SEQ_FRAG_MASK,
2174 ni->ni_rxfragstamp);
2175 printf("\trssi %d noise %d intval %u capinfo 0x%x\n",
2176 node_getrssi(ni), ni->ni_noise,
2177 ni->ni_intval, ni->ni_capinfo);
2178 printf("\tbssid %s essid \"%.*s\" channel %u:0x%x\n",
2179 ether_sprintf(ni->ni_bssid),
2180 ni->ni_esslen, ni->ni_essid,
2181 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags);
2182 printf("\tinact %u inact_reload %u txrate %u\n",
2183 ni->ni_inact, ni->ni_inact_reload, ni->ni_txrate);
2184 printf("\thtcap %x htparam %x htctlchan %u ht2ndchan %u\n",
2185 ni->ni_htcap, ni->ni_htparam,
2186 ni->ni_htctlchan, ni->ni_ht2ndchan);
2187 printf("\thtopmode %x htstbc %x chw %u\n",
2188 ni->ni_htopmode, ni->ni_htstbc, ni->ni_chw);
2189 }
2190
2191 void
2192 ieee80211_dump_nodes(struct ieee80211_node_table *nt)
2193 {
2194 ieee80211_iterate_nodes(nt,
2195 (ieee80211_iter_func *) ieee80211_dump_node, nt);
2196 }
2197
2198 static void
2199 ieee80211_notify_erp_locked(struct ieee80211com *ic)
2200 {
2201 struct ieee80211vap *vap;
2202
2203 IEEE80211_LOCK_ASSERT(ic);
2204
2205 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
2206 if (vap->iv_opmode == IEEE80211_M_HOSTAP)
2207 ieee80211_beacon_notify(vap, IEEE80211_BEACON_ERP);
2208 }
2209
2210 void
2211 ieee80211_notify_erp(struct ieee80211com *ic)
2212 {
2213 IEEE80211_LOCK(ic);
2214 ieee80211_notify_erp_locked(ic);
2215 IEEE80211_UNLOCK(ic);
2216 }
2217
2218 /*
2219 * Handle a station joining an 11g network.
2220 */
2221 static void
2222 ieee80211_node_join_11g(struct ieee80211_node *ni)
2223 {
2224 struct ieee80211com *ic = ni->ni_ic;
2225
2226 IEEE80211_LOCK_ASSERT(ic);
2227
2228 /*
2229 * Station isn't capable of short slot time. Bump
2230 * the count of long slot time stations and disable
2231 * use of short slot time. Note that the actual switch
2232 * over to long slot time use may not occur until the
2233 * next beacon transmission (per sec. 7.3.1.4 of 11g).
2234 */
2235 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) {
2236 ic->ic_longslotsta++;
2237 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2238 "station needs long slot time, count %d",
2239 ic->ic_longslotsta);
2240 /* XXX vap's w/ conflicting needs won't work */
2241 if (!IEEE80211_IS_CHAN_108G(ic->ic_bsschan)) {
2242 /*
2243 * Don't force slot time when switched to turbo
2244 * mode as non-ERP stations won't be present; this
2245 * need only be done when on the normal G channel.
2246 */
2247 ieee80211_set_shortslottime(ic, 0);
2248 }
2249 }
2250 /*
2251 * If the new station is not an ERP station
2252 * then bump the counter and enable protection
2253 * if configured.
2254 */
2255 if (!ieee80211_iserp_rateset(&ni->ni_rates)) {
2256 ic->ic_nonerpsta++;
2257 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2258 "station is !ERP, %d non-ERP stations associated",
2259 ic->ic_nonerpsta);
2260 /*
2261 * If station does not support short preamble
2262 * then we must enable use of Barker preamble.
2263 */
2264 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) {
2265 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2266 "%s", "station needs long preamble");
2267 ic->ic_flags |= IEEE80211_F_USEBARKER;
2268 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE;
2269 }
2270 /*
2271 * If protection is configured and this is the first
2272 * indication we should use protection, enable it.
2273 */
2274 if (ic->ic_protmode != IEEE80211_PROT_NONE &&
2275 ic->ic_nonerpsta == 1 &&
2276 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) {
2277 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC,
2278 "%s: enable use of protection\n", __func__);
2279 ic->ic_flags |= IEEE80211_F_USEPROT;
2280 ieee80211_notify_erp_locked(ic);
2281 }
2282 } else
2283 ni->ni_flags |= IEEE80211_NODE_ERP;
2284 }
2285
2286 void
2287 ieee80211_node_join(struct ieee80211_node *ni, int resp)
2288 {
2289 struct ieee80211com *ic = ni->ni_ic;
2290 struct ieee80211vap *vap = ni->ni_vap;
2291 int newassoc;
2292
2293 if (ni->ni_associd == 0) {
2294 uint16_t aid;
2295
2296 KASSERT(vap->iv_aid_bitmap != NULL, ("no aid bitmap"));
2297 /*
2298 * It would be good to search the bitmap
2299 * more efficiently, but this will do for now.
2300 */
2301 for (aid = 1; aid < vap->iv_max_aid; aid++) {
2302 if (!IEEE80211_AID_ISSET(vap, aid))
2303 break;
2304 }
2305 if (aid >= vap->iv_max_aid) {
2306 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_TOOMANY);
2307 ieee80211_node_leave(ni);
2308 return;
2309 }
2310 ni->ni_associd = aid | 0xc000;
2311 ni->ni_jointime = time_uptime;
2312 IEEE80211_LOCK(ic);
2313 IEEE80211_AID_SET(vap, ni->ni_associd);
2314 vap->iv_sta_assoc++;
2315 ic->ic_sta_assoc++;
2316
2317 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan))
2318 ieee80211_ht_node_join(ni);
2319 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) &&
2320 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan))
2321 ieee80211_node_join_11g(ni);
2322 IEEE80211_UNLOCK(ic);
2323
2324 newassoc = 1;
2325 } else
2326 newassoc = 0;
2327
2328 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni,
2329 "station associated at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s",
2330 IEEE80211_NODE_AID(ni),
2331 ic->ic_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long",
2332 ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long",
2333 ic->ic_flags & IEEE80211_F_USEPROT ? ", protection" : "",
2334 ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "",
2335 ni->ni_flags & IEEE80211_NODE_HT ?
2336 (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "",
2337 ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "",
2338 ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" :
2339 ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "",
2340 ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "",
2341 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ?
2342 ", fast-frames" : "",
2343 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ?
2344 ", turbo" : ""
2345 );
2346
2347 ieee80211_node_setuptxparms(ni);
2348 ieee80211_ratectl_node_init(ni);
2349 /* give driver a chance to setup state like ni_txrate */
2350 if (ic->ic_newassoc != NULL)
2351 ic->ic_newassoc(ni, newassoc);
2352 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_SUCCESS);
2353 /* tell the authenticator about new station */
2354 if (vap->iv_auth->ia_node_join != NULL)
2355 vap->iv_auth->ia_node_join(ni);
2356 ieee80211_notify_node_join(ni,
2357 resp == IEEE80211_FC0_SUBTYPE_ASSOC_RESP);
2358 }
2359
2360 static void
2361 disable_protection(struct ieee80211com *ic)
2362 {
2363 KASSERT(ic->ic_nonerpsta == 0 &&
2364 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0,
2365 ("%d non ERP stations, flags 0x%x", ic->ic_nonerpsta,
2366 ic->ic_flags_ext));
2367
2368 ic->ic_flags &= ~IEEE80211_F_USEPROT;
2369 /* XXX verify mode? */
2370 if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) {
2371 ic->ic_flags |= IEEE80211_F_SHPREAMBLE;
2372 ic->ic_flags &= ~IEEE80211_F_USEBARKER;
2373 }
2374 ieee80211_notify_erp_locked(ic);
2375 }
2376
2377 /*
2378 * Handle a station leaving an 11g network.
2379 */
2380 static void
2381 ieee80211_node_leave_11g(struct ieee80211_node *ni)
2382 {
2383 struct ieee80211com *ic = ni->ni_ic;
2384
2385 IEEE80211_LOCK_ASSERT(ic);
2386
2387 KASSERT(IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan),
2388 ("not in 11g, bss %u:0x%x", ic->ic_bsschan->ic_freq,
2389 ic->ic_bsschan->ic_flags));
2390
2391 /*
2392 * If a long slot station do the slot time bookkeeping.
2393 */
2394 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) {
2395 KASSERT(ic->ic_longslotsta > 0,
2396 ("bogus long slot station count %d", ic->ic_longslotsta));
2397 ic->ic_longslotsta--;
2398 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2399 "long slot time station leaves, count now %d",
2400 ic->ic_longslotsta);
2401 if (ic->ic_longslotsta == 0) {
2402 /*
2403 * Re-enable use of short slot time if supported
2404 * and not operating in IBSS mode (per spec).
2405 */
2406 if ((ic->ic_caps & IEEE80211_C_SHSLOT) &&
2407 ic->ic_opmode != IEEE80211_M_IBSS) {
2408 IEEE80211_DPRINTF(ni->ni_vap,
2409 IEEE80211_MSG_ASSOC,
2410 "%s: re-enable use of short slot time\n",
2411 __func__);
2412 ieee80211_set_shortslottime(ic, 1);
2413 }
2414 }
2415 }
2416 /*
2417 * If a non-ERP station do the protection-related bookkeeping.
2418 */
2419 if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) {
2420 KASSERT(ic->ic_nonerpsta > 0,
2421 ("bogus non-ERP station count %d", ic->ic_nonerpsta));
2422 ic->ic_nonerpsta--;
2423 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2424 "non-ERP station leaves, count now %d%s", ic->ic_nonerpsta,
2425 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) ?
2426 " (non-ERP sta present)" : "");
2427 if (ic->ic_nonerpsta == 0 &&
2428 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) {
2429 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC,
2430 "%s: disable use of protection\n", __func__);
2431 disable_protection(ic);
2432 }
2433 }
2434 }
2435
2436 /*
2437 * Time out presence of an overlapping bss with non-ERP
2438 * stations. When operating in hostap mode we listen for
2439 * beacons from other stations and if we identify a non-ERP
2440 * station is present we enable protection. To identify
2441 * when all non-ERP stations are gone we time out this
2442 * condition.
2443 */
2444 static void
2445 ieee80211_erp_timeout(struct ieee80211com *ic)
2446 {
2447
2448 IEEE80211_LOCK_ASSERT(ic);
2449
2450 if ((ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) &&
2451 time_after(ticks, ic->ic_lastnonerp + IEEE80211_NONERP_PRESENT_AGE)) {
2452 #if 0
2453 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni,
2454 "%s", "age out non-ERP sta present on channel");
2455 #endif
2456 ic->ic_flags_ext &= ~IEEE80211_FEXT_NONERP_PR;
2457 if (ic->ic_nonerpsta == 0)
2458 disable_protection(ic);
2459 }
2460 }
2461
2462 /*
2463 * Handle bookkeeping for station deauthentication/disassociation
2464 * when operating as an ap.
2465 */
2466 void
2467 ieee80211_node_leave(struct ieee80211_node *ni)
2468 {
2469 struct ieee80211com *ic = ni->ni_ic;
2470 struct ieee80211vap *vap = ni->ni_vap;
2471 struct ieee80211_node_table *nt = ni->ni_table;
2472
2473 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni,
2474 "station with aid %d leaves", IEEE80211_NODE_AID(ni));
2475
2476 KASSERT(vap->iv_opmode != IEEE80211_M_STA,
2477 ("unexpected operating mode %u", vap->iv_opmode));
2478 /*
2479 * If node wasn't previously associated all
2480 * we need to do is reclaim the reference.
2481 */
2482 /* XXX ibss mode bypasses 11g and notification */
2483 if (ni->ni_associd == 0)
2484 goto done;
2485 /*
2486 * Tell the authenticator the station is leaving.
2487 * Note that we must do this before yanking the
2488 * association id as the authenticator uses the
2489 * associd to locate it's state block.
2490 */
2491 if (vap->iv_auth->ia_node_leave != NULL)
2492 vap->iv_auth->ia_node_leave(ni);
2493
2494 IEEE80211_LOCK(ic);
2495 IEEE80211_AID_CLR(vap, ni->ni_associd);
2496 ni->ni_associd = 0;
2497 vap->iv_sta_assoc--;
2498 ic->ic_sta_assoc--;
2499
2500 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan))
2501 ieee80211_ht_node_leave(ni);
2502 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) &&
2503 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan))
2504 ieee80211_node_leave_11g(ni);
2505 IEEE80211_UNLOCK(ic);
2506 /*
2507 * Cleanup station state. In particular clear various
2508 * state that might otherwise be reused if the node
2509 * is reused before the reference count goes to zero
2510 * (and memory is reclaimed).
2511 */
2512 ieee80211_sta_leave(ni);
2513 done:
2514 /*
2515 * Remove the node from any table it's recorded in and
2516 * drop the caller's reference. Removal from the table
2517 * is important to insure the node is not reprocessed
2518 * for inactivity.
2519 */
2520 if (nt != NULL) {
2521 IEEE80211_NODE_LOCK(nt);
2522 node_reclaim(nt, ni);
2523 IEEE80211_NODE_UNLOCK(nt);
2524 } else
2525 ieee80211_free_node(ni);
2526 }
2527
2528 struct rssiinfo {
2529 struct ieee80211vap *vap;
2530 int rssi_samples;
2531 uint32_t rssi_total;
2532 };
2533
2534 static void
2535 get_hostap_rssi(void *arg, struct ieee80211_node *ni)
2536 {
2537 struct rssiinfo *info = arg;
2538 struct ieee80211vap *vap = ni->ni_vap;
2539 int8_t rssi;
2540
2541 if (info->vap != vap)
2542 return;
2543 /* only associated stations */
2544 if (ni->ni_associd == 0)
2545 return;
2546 rssi = vap->iv_ic->ic_node_getrssi(ni);
2547 if (rssi != 0) {
2548 info->rssi_samples++;
2549 info->rssi_total += rssi;
2550 }
2551 }
2552
2553 static void
2554 get_adhoc_rssi(void *arg, struct ieee80211_node *ni)
2555 {
2556 struct rssiinfo *info = arg;
2557 struct ieee80211vap *vap = ni->ni_vap;
2558 int8_t rssi;
2559
2560 if (info->vap != vap)
2561 return;
2562 /* only neighbors */
2563 /* XXX check bssid */
2564 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0)
2565 return;
2566 rssi = vap->iv_ic->ic_node_getrssi(ni);
2567 if (rssi != 0) {
2568 info->rssi_samples++;
2569 info->rssi_total += rssi;
2570 }
2571 }
2572
2573 #ifdef IEEE80211_SUPPORT_MESH
2574 static void
2575 get_mesh_rssi(void *arg, struct ieee80211_node *ni)
2576 {
2577 struct rssiinfo *info = arg;
2578 struct ieee80211vap *vap = ni->ni_vap;
2579 int8_t rssi;
2580
2581 if (info->vap != vap)
2582 return;
2583 /* only neighbors that peered successfully */
2584 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED)
2585 return;
2586 rssi = vap->iv_ic->ic_node_getrssi(ni);
2587 if (rssi != 0) {
2588 info->rssi_samples++;
2589 info->rssi_total += rssi;
2590 }
2591 }
2592 #endif /* IEEE80211_SUPPORT_MESH */
2593
2594 int8_t
2595 ieee80211_getrssi(struct ieee80211vap *vap)
2596 {
2597 #define NZ(x) ((x) == 0 ? 1 : (x))
2598 struct ieee80211com *ic = vap->iv_ic;
2599 struct rssiinfo info;
2600
2601 info.rssi_total = 0;
2602 info.rssi_samples = 0;
2603 info.vap = vap;
2604 switch (vap->iv_opmode) {
2605 case IEEE80211_M_IBSS: /* average of all ibss neighbors */
2606 case IEEE80211_M_AHDEMO: /* average of all neighbors */
2607 ieee80211_iterate_nodes(&ic->ic_sta, get_adhoc_rssi, &info);
2608 break;
2609 case IEEE80211_M_HOSTAP: /* average of all associated stations */
2610 ieee80211_iterate_nodes(&ic->ic_sta, get_hostap_rssi, &info);
2611 break;
2612 #ifdef IEEE80211_SUPPORT_MESH
2613 case IEEE80211_M_MBSS: /* average of all mesh neighbors */
2614 ieee80211_iterate_nodes(&ic->ic_sta, get_mesh_rssi, &info);
2615 break;
2616 #endif
2617 case IEEE80211_M_MONITOR: /* XXX */
2618 case IEEE80211_M_STA: /* use stats from associated ap */
2619 default:
2620 if (vap->iv_bss != NULL)
2621 info.rssi_total = ic->ic_node_getrssi(vap->iv_bss);
2622 info.rssi_samples = 1;
2623 break;
2624 }
2625 return info.rssi_total / NZ(info.rssi_samples);
2626 #undef NZ
2627 }
2628
2629 void
2630 ieee80211_getsignal(struct ieee80211vap *vap, int8_t *rssi, int8_t *noise)
2631 {
2632
2633 if (vap->iv_bss == NULL) /* NB: shouldn't happen */
2634 return;
2635 vap->iv_ic->ic_node_getsignal(vap->iv_bss, rssi, noise);
2636 /* for non-station mode return avg'd rssi accounting */
2637 if (vap->iv_opmode != IEEE80211_M_STA)
2638 *rssi = ieee80211_getrssi(vap);
2639 }
Cache object: e4def26215b9a8dd1fdfec9b1633c814
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