2 * Copyright (c) 2001 Atsushi Onoe
3 * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
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.
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.
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
32 #include <sys/param.h>
33 #include <sys/systm.h>
35 #include <sys/malloc.h>
36 #include <sys/kernel.h>
38 #include <sys/socket.h>
41 #include <net/if_var.h>
42 #include <net/if_media.h>
43 #include <net/ethernet.h>
45 #include <net80211/ieee80211_var.h>
46 #include <net80211/ieee80211_input.h>
47 #ifdef IEEE80211_SUPPORT_SUPERG
48 #include <net80211/ieee80211_superg.h>
50 #ifdef IEEE80211_SUPPORT_TDMA
51 #include <net80211/ieee80211_tdma.h>
53 #include <net80211/ieee80211_wds.h>
54 #include <net80211/ieee80211_mesh.h>
55 #include <net80211/ieee80211_ratectl.h>
60 * IEEE80211_NODE_HASHSIZE must be a power of 2.
62 CTASSERT((IEEE80211_NODE_HASHSIZE & (IEEE80211_NODE_HASHSIZE-1)) == 0);
65 * Association id's are managed with a bit vector.
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)))
76 #ifdef IEEE80211_DEBUG_REFCNT
77 #define REFCNT_LOC "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line
79 #define REFCNT_LOC "%s %p<%s> refcnt %d\n", __func__
82 static int ieee80211_sta_join1(struct ieee80211_node *);
84 static struct ieee80211_node *node_alloc(struct ieee80211vap *,
85 const uint8_t [IEEE80211_ADDR_LEN]);
86 static void node_cleanup(struct ieee80211_node *);
87 static void node_free(struct ieee80211_node *);
88 static void node_age(struct ieee80211_node *);
89 static int8_t node_getrssi(const struct ieee80211_node *);
90 static void node_getsignal(const struct ieee80211_node *, int8_t *, int8_t *);
91 static void node_getmimoinfo(const struct ieee80211_node *,
92 struct ieee80211_mimo_info *);
94 static void _ieee80211_free_node(struct ieee80211_node *);
96 static void node_reclaim(struct ieee80211_node_table *nt,
97 struct ieee80211_node *ni);
98 static void ieee80211_node_table_init(struct ieee80211com *ic,
99 struct ieee80211_node_table *nt, const char *name,
100 int inact, int keymaxix);
101 static void ieee80211_node_table_reset(struct ieee80211_node_table *,
102 struct ieee80211vap *);
103 static void ieee80211_node_table_cleanup(struct ieee80211_node_table *nt);
104 static void ieee80211_erp_timeout(struct ieee80211com *);
106 MALLOC_DEFINE(M_80211_NODE, "80211node", "802.11 node state");
107 MALLOC_DEFINE(M_80211_NODE_IE, "80211nodeie", "802.11 node ie");
110 ieee80211_node_attach(struct ieee80211com *ic)
112 /* XXX really want maxlen enforced per-sta */
113 ieee80211_ageq_init(&ic->ic_stageq, ic->ic_max_keyix * 8,
115 ieee80211_node_table_init(ic, &ic->ic_sta, "station",
116 IEEE80211_INACT_INIT, ic->ic_max_keyix);
117 callout_init(&ic->ic_inact, 1);
118 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz,
119 ieee80211_node_timeout, ic);
121 ic->ic_node_alloc = node_alloc;
122 ic->ic_node_free = node_free;
123 ic->ic_node_cleanup = node_cleanup;
124 ic->ic_node_age = node_age;
125 ic->ic_node_drain = node_age; /* NB: same as age */
126 ic->ic_node_getrssi = node_getrssi;
127 ic->ic_node_getsignal = node_getsignal;
128 ic->ic_node_getmimoinfo = node_getmimoinfo;
131 * Set flags to be propagated to all vap's;
132 * these define default behaviour/configuration.
134 ic->ic_flags_ext |= IEEE80211_FEXT_INACT; /* inactivity processing */
138 ieee80211_node_detach(struct ieee80211com *ic)
141 callout_drain(&ic->ic_inact);
142 ieee80211_node_table_cleanup(&ic->ic_sta);
143 ieee80211_ageq_cleanup(&ic->ic_stageq);
147 ieee80211_node_vattach(struct ieee80211vap *vap)
149 /* NB: driver can override */
150 vap->iv_max_aid = IEEE80211_AID_DEF;
152 /* default station inactivity timer setings */
153 vap->iv_inact_init = IEEE80211_INACT_INIT;
154 vap->iv_inact_auth = IEEE80211_INACT_AUTH;
155 vap->iv_inact_run = IEEE80211_INACT_RUN;
156 vap->iv_inact_probe = IEEE80211_INACT_PROBE;
158 IEEE80211_DPRINTF(vap, IEEE80211_MSG_INACT,
159 "%s: init %u auth %u run %u probe %u\n", __func__,
160 vap->iv_inact_init, vap->iv_inact_auth,
161 vap->iv_inact_run, vap->iv_inact_probe);
165 ieee80211_node_latevattach(struct ieee80211vap *vap)
167 if (vap->iv_opmode == IEEE80211_M_HOSTAP) {
168 /* XXX should we allow max aid to be zero? */
169 if (vap->iv_max_aid < IEEE80211_AID_MIN) {
170 vap->iv_max_aid = IEEE80211_AID_MIN;
171 if_printf(vap->iv_ifp,
172 "WARNING: max aid too small, changed to %d\n",
175 vap->iv_aid_bitmap = (uint32_t *) IEEE80211_MALLOC(
176 howmany(vap->iv_max_aid, 32) * sizeof(uint32_t),
178 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
179 if (vap->iv_aid_bitmap == NULL) {
180 /* XXX no way to recover */
181 printf("%s: no memory for AID bitmap, max aid %d!\n",
182 __func__, vap->iv_max_aid);
187 ieee80211_reset_bss(vap);
189 vap->iv_auth = ieee80211_authenticator_get(vap->iv_bss->ni_authmode);
193 ieee80211_node_vdetach(struct ieee80211vap *vap)
195 struct ieee80211com *ic = vap->iv_ic;
197 ieee80211_node_table_reset(&ic->ic_sta, vap);
198 if (vap->iv_bss != NULL) {
199 ieee80211_free_node(vap->iv_bss);
202 if (vap->iv_aid_bitmap != NULL) {
203 IEEE80211_FREE(vap->iv_aid_bitmap, M_80211_NODE);
204 vap->iv_aid_bitmap = NULL;
209 * Port authorize/unauthorize interfaces for use by an authenticator.
213 ieee80211_node_authorize(struct ieee80211_node *ni)
215 struct ieee80211vap *vap = ni->ni_vap;
217 ni->ni_flags |= IEEE80211_NODE_AUTH;
218 ni->ni_inact_reload = vap->iv_inact_run;
219 ni->ni_inact = ni->ni_inact_reload;
221 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni,
222 "%s: inact_reload %u", __func__, ni->ni_inact_reload);
226 ieee80211_node_unauthorize(struct ieee80211_node *ni)
228 struct ieee80211vap *vap = ni->ni_vap;
230 ni->ni_flags &= ~IEEE80211_NODE_AUTH;
231 ni->ni_inact_reload = vap->iv_inact_auth;
232 if (ni->ni_inact > ni->ni_inact_reload)
233 ni->ni_inact = ni->ni_inact_reload;
235 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni,
236 "%s: inact_reload %u inact %u", __func__,
237 ni->ni_inact_reload, ni->ni_inact);
241 * Fix tx parameters for a node according to ``association state''.
244 ieee80211_node_setuptxparms(struct ieee80211_node *ni)
246 struct ieee80211vap *vap = ni->ni_vap;
247 enum ieee80211_phymode mode;
249 if (ni->ni_flags & IEEE80211_NODE_HT) {
250 if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan))
251 mode = IEEE80211_MODE_11NA;
253 mode = IEEE80211_MODE_11NG;
254 } else { /* legacy rate handling */
255 if (IEEE80211_IS_CHAN_ST(ni->ni_chan))
256 mode = IEEE80211_MODE_STURBO_A;
257 else if (IEEE80211_IS_CHAN_HALF(ni->ni_chan))
258 mode = IEEE80211_MODE_HALF;
259 else if (IEEE80211_IS_CHAN_QUARTER(ni->ni_chan))
260 mode = IEEE80211_MODE_QUARTER;
261 /* NB: 108A should be handled as 11a */
262 else if (IEEE80211_IS_CHAN_A(ni->ni_chan))
263 mode = IEEE80211_MODE_11A;
264 else if (IEEE80211_IS_CHAN_108G(ni->ni_chan) ||
265 (ni->ni_flags & IEEE80211_NODE_ERP))
266 mode = IEEE80211_MODE_11G;
268 mode = IEEE80211_MODE_11B;
270 ni->ni_txparms = &vap->iv_txparms[mode];
274 * Set/change the channel. The rate set is also updated as
275 * to insure a consistent view by drivers.
276 * XXX should be private but hostap needs it to deal with CSA
279 ieee80211_node_set_chan(struct ieee80211_node *ni,
280 struct ieee80211_channel *chan)
282 struct ieee80211com *ic = ni->ni_ic;
283 struct ieee80211vap *vap = ni->ni_vap;
284 enum ieee80211_phymode mode;
286 KASSERT(chan != IEEE80211_CHAN_ANYC, ("no channel"));
289 mode = ieee80211_chan2mode(chan);
290 if (IEEE80211_IS_CHAN_HT(chan)) {
292 * We must install the legacy rate est in ni_rates and the
293 * HT rate set in ni_htrates.
295 ni->ni_htrates = *ieee80211_get_suphtrates(ic, chan);
297 * Setup bss tx parameters based on operating mode. We
298 * use legacy rates when operating in a mixed HT+non-HT bss
299 * and non-ERP rates in 11g for mixed ERP+non-ERP bss.
301 if (mode == IEEE80211_MODE_11NA &&
302 (vap->iv_flags_ht & IEEE80211_FHT_PUREN) == 0)
303 mode = IEEE80211_MODE_11A;
304 else if (mode == IEEE80211_MODE_11NG &&
305 (vap->iv_flags_ht & IEEE80211_FHT_PUREN) == 0)
306 mode = IEEE80211_MODE_11G;
307 if (mode == IEEE80211_MODE_11G &&
308 (vap->iv_flags & IEEE80211_F_PUREG) == 0)
309 mode = IEEE80211_MODE_11B;
311 ni->ni_txparms = &vap->iv_txparms[mode];
312 ni->ni_rates = *ieee80211_get_suprates(ic, chan);
316 copy_bss(struct ieee80211_node *nbss, const struct ieee80211_node *obss)
318 /* propagate useful state */
319 nbss->ni_authmode = obss->ni_authmode;
320 nbss->ni_txpower = obss->ni_txpower;
321 nbss->ni_vlan = obss->ni_vlan;
322 /* XXX statistics? */
323 /* XXX legacy WDS bssid? */
327 ieee80211_create_ibss(struct ieee80211vap* vap, struct ieee80211_channel *chan)
329 struct ieee80211com *ic = vap->iv_ic;
330 struct ieee80211_node *ni;
332 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN,
333 "%s: creating %s on channel %u\n", __func__,
334 ieee80211_opmode_name[vap->iv_opmode],
335 ieee80211_chan2ieee(ic, chan));
337 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr);
342 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr);
343 ni->ni_esslen = vap->iv_des_ssid[0].len;
344 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen);
345 if (vap->iv_bss != NULL)
346 copy_bss(ni, vap->iv_bss);
347 ni->ni_intval = ic->ic_bintval;
348 if (vap->iv_flags & IEEE80211_F_PRIVACY)
349 ni->ni_capinfo |= IEEE80211_CAPINFO_PRIVACY;
350 if (ic->ic_phytype == IEEE80211_T_FH) {
351 ni->ni_fhdwell = 200; /* XXX */
354 if (vap->iv_opmode == IEEE80211_M_IBSS) {
355 vap->iv_flags |= IEEE80211_F_SIBSS;
356 ni->ni_capinfo |= IEEE80211_CAPINFO_IBSS; /* XXX */
357 if (vap->iv_flags & IEEE80211_F_DESBSSID)
358 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid);
360 get_random_bytes(ni->ni_bssid, IEEE80211_ADDR_LEN);
361 /* clear group bit, add local bit */
362 ni->ni_bssid[0] = (ni->ni_bssid[0] &~ 0x01) | 0x02;
364 } else if (vap->iv_opmode == IEEE80211_M_AHDEMO) {
365 if (vap->iv_flags & IEEE80211_F_DESBSSID)
366 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid);
368 #ifdef IEEE80211_SUPPORT_TDMA
369 if ((vap->iv_caps & IEEE80211_C_TDMA) == 0)
371 memset(ni->ni_bssid, 0, IEEE80211_ADDR_LEN);
372 #ifdef IEEE80211_SUPPORT_MESH
373 } else if (vap->iv_opmode == IEEE80211_M_MBSS) {
374 ni->ni_meshidlen = vap->iv_mesh->ms_idlen;
375 memcpy(ni->ni_meshid, vap->iv_mesh->ms_id, ni->ni_meshidlen);
379 * Fix the channel and related attributes.
381 /* clear DFS CAC state on previous channel */
382 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC &&
383 ic->ic_bsschan->ic_freq != chan->ic_freq &&
384 IEEE80211_IS_CHAN_CACDONE(ic->ic_bsschan))
385 ieee80211_dfs_cac_clear(ic, ic->ic_bsschan);
386 ic->ic_bsschan = chan;
387 ieee80211_node_set_chan(ni, chan);
388 ic->ic_curmode = ieee80211_chan2mode(chan);
390 * Do mode-specific setup.
392 if (IEEE80211_IS_CHAN_FULL(chan)) {
393 if (IEEE80211_IS_CHAN_ANYG(chan)) {
395 * Use a mixed 11b/11g basic rate set.
397 ieee80211_setbasicrates(&ni->ni_rates,
399 if (vap->iv_flags & IEEE80211_F_PUREG) {
401 * Also mark OFDM rates basic so 11b
402 * stations do not join (WiFi compliance).
404 ieee80211_addbasicrates(&ni->ni_rates,
407 } else if (IEEE80211_IS_CHAN_B(chan)) {
409 * Force pure 11b rate set.
411 ieee80211_setbasicrates(&ni->ni_rates,
416 (void) ieee80211_sta_join1(ieee80211_ref_node(ni));
420 * Reset bss state on transition to the INIT state.
421 * Clear any stations from the table (they have been
422 * deauth'd) and reset the bss node (clears key, rate
426 ieee80211_reset_bss(struct ieee80211vap *vap)
428 struct ieee80211com *ic = vap->iv_ic;
429 struct ieee80211_node *ni, *obss;
431 ieee80211_node_table_reset(&ic->ic_sta, vap);
432 /* XXX multi-bss: wrong */
433 ieee80211_reset_erp(ic);
435 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr);
436 KASSERT(ni != NULL, ("unable to setup initial BSS node"));
438 vap->iv_bss = ieee80211_ref_node(ni);
441 ni->ni_intval = ic->ic_bintval;
442 ieee80211_free_node(obss);
444 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr);
448 match_ssid(const struct ieee80211_node *ni,
449 int nssid, const struct ieee80211_scan_ssid ssids[])
453 for (i = 0; i < nssid; i++) {
454 if (ni->ni_esslen == ssids[i].len &&
455 memcmp(ni->ni_essid, ssids[i].ssid, ni->ni_esslen) == 0)
462 * Test a node for suitability/compatibility.
465 check_bss(struct ieee80211vap *vap, struct ieee80211_node *ni)
467 struct ieee80211com *ic = ni->ni_ic;
470 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan)))
472 if (vap->iv_opmode == IEEE80211_M_IBSS) {
473 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0)
476 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0)
479 if (vap->iv_flags & IEEE80211_F_PRIVACY) {
480 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0)
483 /* XXX does this mean privacy is supported or required? */
484 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY)
487 rate = ieee80211_fix_rate(ni, &ni->ni_rates,
488 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE);
489 if (rate & IEEE80211_RATE_BASIC)
491 if (vap->iv_des_nssid != 0 &&
492 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid))
494 if ((vap->iv_flags & IEEE80211_F_DESBSSID) &&
495 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid))
500 #ifdef IEEE80211_DEBUG
502 * Display node suitability/compatibility.
505 check_bss_debug(struct ieee80211vap *vap, struct ieee80211_node *ni)
507 struct ieee80211com *ic = ni->ni_ic;
512 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan)))
514 if (vap->iv_opmode == IEEE80211_M_IBSS) {
515 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0)
518 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0)
521 if (vap->iv_flags & IEEE80211_F_PRIVACY) {
522 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0)
525 /* XXX does this mean privacy is supported or required? */
526 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY)
529 rate = ieee80211_fix_rate(ni, &ni->ni_rates,
530 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE);
531 if (rate & IEEE80211_RATE_BASIC)
533 if (vap->iv_des_nssid != 0 &&
534 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid))
536 if ((vap->iv_flags & IEEE80211_F_DESBSSID) &&
537 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid))
540 printf(" %c %s", fail ? '-' : '+', ether_sprintf(ni->ni_macaddr));
541 printf(" %s%c", ether_sprintf(ni->ni_bssid), fail & 0x20 ? '!' : ' ');
543 ieee80211_chan2ieee(ic, ni->ni_chan), fail & 0x01 ? '!' : ' ');
544 printf(" %2dM%c", (rate & IEEE80211_RATE_VAL) / 2,
545 fail & 0x08 ? '!' : ' ');
547 (ni->ni_capinfo & IEEE80211_CAPINFO_ESS) ? "ess" :
548 (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) ? "ibss" :
550 fail & 0x02 ? '!' : ' ');
552 (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) ? "wep" : "no",
553 fail & 0x04 ? '!' : ' ');
554 ieee80211_print_essid(ni->ni_essid, ni->ni_esslen);
555 printf("%s\n", fail & 0x10 ? "!" : "");
557 #endif /* IEEE80211_DEBUG */
561 ieee80211_ibss_merge_check(struct ieee80211_node *ni)
563 struct ieee80211vap *vap = ni->ni_vap;
565 if (ni == vap->iv_bss ||
566 IEEE80211_ADDR_EQ(ni->ni_bssid, vap->iv_bss->ni_bssid)) {
567 /* unchanged, nothing to do */
571 if (!check_bss(vap, ni)) {
572 /* capabilities mismatch */
573 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC,
574 "%s: merge failed, capabilities mismatch\n", __func__);
575 #ifdef IEEE80211_DEBUG
576 if (ieee80211_msg_assoc(vap))
577 check_bss_debug(vap, ni);
579 vap->iv_stats.is_ibss_capmismatch++;
587 * Handle 802.11 ad hoc network merge. The
588 * convention, set by the Wireless Ethernet Compatibility Alliance
589 * (WECA), is that an 802.11 station will change its BSSID to match
590 * the "oldest" 802.11 ad hoc network, on the same channel, that
591 * has the station's desired SSID. The "oldest" 802.11 network
592 * sends beacons with the greatest TSF timestamp.
594 * The caller is assumed to validate TSF's before attempting a merge.
596 * Return !0 if the BSSID changed, 0 otherwise.
599 ieee80211_ibss_merge(struct ieee80211_node *ni)
601 struct ieee80211vap *vap = ni->ni_vap;
602 #ifdef IEEE80211_DEBUG
603 struct ieee80211com *ic = ni->ni_ic;
606 if (! ieee80211_ibss_merge_check(ni))
609 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC,
610 "%s: new bssid %s: %s preamble, %s slot time%s\n", __func__,
611 ether_sprintf(ni->ni_bssid),
612 ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long",
613 ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long",
614 ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : ""
616 return ieee80211_sta_join1(ieee80211_ref_node(ni));
620 * Calculate HT channel promotion flags for all vaps.
621 * This assumes ni_chan have been setup for each vap.
624 gethtadjustflags(struct ieee80211com *ic)
626 struct ieee80211vap *vap;
631 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
632 if (vap->iv_state < IEEE80211_S_RUN)
634 switch (vap->iv_opmode) {
635 case IEEE80211_M_WDS:
636 case IEEE80211_M_STA:
637 case IEEE80211_M_AHDEMO:
638 case IEEE80211_M_HOSTAP:
639 case IEEE80211_M_IBSS:
640 case IEEE80211_M_MBSS:
641 flags |= ieee80211_htchanflags(vap->iv_bss->ni_chan);
651 * Check if the current channel needs to change based on whether
652 * any vap's are using HT20/HT40. This is used to sync the state
653 * of ic_curchan after a channel width change on a running vap.
656 ieee80211_sync_curchan(struct ieee80211com *ic)
658 struct ieee80211_channel *c;
660 c = ieee80211_ht_adjust_channel(ic, ic->ic_curchan, gethtadjustflags(ic));
661 if (c != ic->ic_curchan) {
663 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan);
664 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan);
665 IEEE80211_UNLOCK(ic);
666 ic->ic_set_channel(ic);
667 ieee80211_radiotap_chan_change(ic);
673 * Setup the current channel. The request channel may be
674 * promoted if other vap's are operating with HT20/HT40.
677 ieee80211_setupcurchan(struct ieee80211com *ic, struct ieee80211_channel *c)
679 if (ic->ic_htcaps & IEEE80211_HTC_HT) {
680 int flags = gethtadjustflags(ic);
682 * Check for channel promotion required to support the
683 * set of running vap's. This assumes we are called
684 * after ni_chan is setup for each vap.
686 /* NB: this assumes IEEE80211_FHT_USEHT40 > IEEE80211_FHT_HT */
687 if (flags > ieee80211_htchanflags(c))
688 c = ieee80211_ht_adjust_channel(ic, c, flags);
690 ic->ic_bsschan = ic->ic_curchan = c;
691 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan);
692 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan);
696 * Change the current channel. The channel change is guaranteed to have
697 * happened before the next state change.
700 ieee80211_setcurchan(struct ieee80211com *ic, struct ieee80211_channel *c)
702 ieee80211_setupcurchan(ic, c);
703 ieee80211_runtask(ic, &ic->ic_chan_task);
707 ieee80211_update_chw(struct ieee80211com *ic)
710 ieee80211_setupcurchan(ic, ic->ic_curchan);
711 ieee80211_runtask(ic, &ic->ic_chw_task);
715 * Join the specified IBSS/BSS network. The node is assumed to
716 * be passed in with a held reference.
719 ieee80211_sta_join1(struct ieee80211_node *selbs)
721 struct ieee80211vap *vap = selbs->ni_vap;
722 struct ieee80211com *ic = selbs->ni_ic;
723 struct ieee80211_node *obss;
727 * Committed to selbs, setup state.
731 * Check if old+new node have the same address in which
732 * case we can reassociate when operating in sta mode.
734 canreassoc = (obss != NULL &&
735 vap->iv_state == IEEE80211_S_RUN &&
736 IEEE80211_ADDR_EQ(obss->ni_macaddr, selbs->ni_macaddr));
737 vap->iv_bss = selbs; /* NB: caller assumed to bump refcnt */
739 struct ieee80211_node_table *nt = obss->ni_table;
741 copy_bss(selbs, obss);
742 ieee80211_node_decref(obss); /* iv_bss reference */
744 IEEE80211_NODE_LOCK(nt);
745 node_reclaim(nt, obss); /* station table reference */
746 IEEE80211_NODE_UNLOCK(nt);
748 obss = NULL; /* NB: guard against later use */
752 * Delete unusable rates; we've already checked
753 * that the negotiated rate set is acceptable.
755 ieee80211_fix_rate(vap->iv_bss, &vap->iv_bss->ni_rates,
756 IEEE80211_F_DODEL | IEEE80211_F_JOIN);
758 ieee80211_setcurchan(ic, selbs->ni_chan);
760 * Set the erp state (mostly the slot time) to deal with
761 * the auto-select case; this should be redundant if the
764 ieee80211_reset_erp(ic);
765 ieee80211_wme_initparams(vap);
767 if (vap->iv_opmode == IEEE80211_M_STA) {
770 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 1);
773 * Act as if we received a DEAUTH frame in case we
774 * are invoked from the RUN state. This will cause
775 * us to try to re-authenticate if we are operating
778 ieee80211_new_state(vap, IEEE80211_S_AUTH,
779 IEEE80211_FC0_SUBTYPE_DEAUTH);
782 ieee80211_new_state(vap, IEEE80211_S_RUN, -1);
787 ieee80211_sta_join(struct ieee80211vap *vap, struct ieee80211_channel *chan,
788 const struct ieee80211_scan_entry *se)
790 struct ieee80211com *ic = vap->iv_ic;
791 struct ieee80211_node *ni;
793 ni = ieee80211_alloc_node(&ic->ic_sta, vap, se->se_macaddr);
800 * Expand scan state into node's format.
801 * XXX may not need all this stuff
803 IEEE80211_ADDR_COPY(ni->ni_bssid, se->se_bssid);
804 ni->ni_esslen = se->se_ssid[1];
805 memcpy(ni->ni_essid, se->se_ssid+2, ni->ni_esslen);
806 ni->ni_tstamp.tsf = se->se_tstamp.tsf;
807 ni->ni_intval = se->se_intval;
808 ni->ni_capinfo = se->se_capinfo;
810 ni->ni_timoff = se->se_timoff;
811 ni->ni_fhdwell = se->se_fhdwell;
812 ni->ni_fhindex = se->se_fhindex;
813 ni->ni_erp = se->se_erp;
814 IEEE80211_RSSI_LPF(ni->ni_avgrssi, se->se_rssi);
815 ni->ni_noise = se->se_noise;
816 if (vap->iv_opmode == IEEE80211_M_STA) {
817 /* NB: only infrastructure mode requires an associd */
818 ni->ni_flags |= IEEE80211_NODE_ASSOCID;
821 if (ieee80211_ies_init(&ni->ni_ies, se->se_ies.data, se->se_ies.len)) {
822 ieee80211_ies_expand(&ni->ni_ies);
823 #ifdef IEEE80211_SUPPORT_SUPERG
824 if (ni->ni_ies.ath_ie != NULL)
825 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie);
827 if (ni->ni_ies.htcap_ie != NULL)
828 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie);
829 if (ni->ni_ies.htinfo_ie != NULL)
830 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie);
831 #ifdef IEEE80211_SUPPORT_MESH
832 if (ni->ni_ies.meshid_ie != NULL)
833 ieee80211_parse_meshid(ni, ni->ni_ies.meshid_ie);
835 #ifdef IEEE80211_SUPPORT_TDMA
836 if (ni->ni_ies.tdma_ie != NULL)
837 ieee80211_parse_tdma(ni, ni->ni_ies.tdma_ie);
841 vap->iv_dtim_period = se->se_dtimperiod;
842 vap->iv_dtim_count = 0;
844 /* NB: must be after ni_chan is setup */
845 ieee80211_setup_rates(ni, se->se_rates, se->se_xrates,
847 if (ieee80211_iserp_rateset(&ni->ni_rates))
848 ni->ni_flags |= IEEE80211_NODE_ERP;
851 * Setup HT state for this node if it's available, otherwise
852 * non-STA modes won't pick this state up.
854 * For IBSS and related modes that don't go through an
855 * association request/response, the only appropriate place
856 * to setup the HT state is here.
858 if (ni->ni_ies.htinfo_ie != NULL &&
859 ni->ni_ies.htcap_ie != NULL &&
860 vap->iv_flags_ht & IEEE80211_FHT_HT) {
861 ieee80211_ht_node_init(ni);
862 ieee80211_ht_updateparams(ni,
864 ni->ni_ies.htinfo_ie);
865 ieee80211_setup_htrates(ni, ni->ni_ies.htcap_ie,
866 IEEE80211_F_JOIN | IEEE80211_F_DOBRS);
867 ieee80211_setup_basic_htrates(ni, ni->ni_ies.htinfo_ie);
869 /* XXX else check for ath FF? */
870 /* XXX QoS? Difficult given that WME config is specific to a master */
872 ieee80211_node_setuptxparms(ni);
873 ieee80211_ratectl_node_init(ni);
875 return ieee80211_sta_join1(ieee80211_ref_node(ni));
879 * Leave the specified IBSS/BSS network. The node is assumed to
880 * be passed in with a held reference.
883 ieee80211_sta_leave(struct ieee80211_node *ni)
885 struct ieee80211com *ic = ni->ni_ic;
887 ic->ic_node_cleanup(ni);
888 ieee80211_notify_node_leave(ni);
892 * Send a deauthenticate frame and drop the station.
895 ieee80211_node_deauth(struct ieee80211_node *ni, int reason)
897 /* NB: bump the refcnt to be sure temporary nodes are not reclaimed */
898 ieee80211_ref_node(ni);
899 if (ni->ni_associd != 0)
900 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH, reason);
901 ieee80211_node_leave(ni);
902 ieee80211_free_node(ni);
905 static struct ieee80211_node *
906 node_alloc(struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN])
908 struct ieee80211_node *ni;
910 ni = (struct ieee80211_node *) IEEE80211_MALLOC(sizeof(struct ieee80211_node),
911 M_80211_NODE, IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
916 * Initialize an ie blob with the specified data. If previous
917 * data exists re-use the data block. As a side effect we clear
918 * all references to specific ie's; the caller is required to
922 ieee80211_ies_init(struct ieee80211_ies *ies, const uint8_t *data, int len)
924 /* NB: assumes data+len are the last fields */
925 memset(ies, 0, offsetof(struct ieee80211_ies, data));
926 if (ies->data != NULL && ies->len != len) {
927 /* data size changed */
928 IEEE80211_FREE(ies->data, M_80211_NODE_IE);
931 if (ies->data == NULL) {
932 ies->data = (uint8_t *) IEEE80211_MALLOC(len, M_80211_NODE_IE,
933 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
934 if (ies->data == NULL) {
936 /* NB: pointers have already been zero'd above */
940 memcpy(ies->data, data, len);
946 * Reclaim storage for an ie blob.
949 ieee80211_ies_cleanup(struct ieee80211_ies *ies)
951 if (ies->data != NULL)
952 IEEE80211_FREE(ies->data, M_80211_NODE_IE);
956 * Expand an ie blob data contents and to fillin individual
957 * ie pointers. The data blob is assumed to be well-formed;
958 * we don't do any validity checking of ie lengths.
961 ieee80211_ies_expand(struct ieee80211_ies *ies)
970 case IEEE80211_ELEMID_VENDOR:
973 else if (iswmeoui(ie))
975 #ifdef IEEE80211_SUPPORT_SUPERG
976 else if (isatherosoui(ie))
979 #ifdef IEEE80211_SUPPORT_TDMA
980 else if (istdmaoui(ie))
984 case IEEE80211_ELEMID_RSN:
987 case IEEE80211_ELEMID_HTCAP:
990 case IEEE80211_ELEMID_HTINFO:
993 #ifdef IEEE80211_SUPPORT_MESH
994 case IEEE80211_ELEMID_MESHID:
1005 * Reclaim any resources in a node and reset any critical
1006 * state. Typically nodes are free'd immediately after,
1007 * but in some cases the storage may be reused so we need
1008 * to insure consistent state (should probably fix that).
1011 node_cleanup(struct ieee80211_node *ni)
1013 struct ieee80211vap *vap = ni->ni_vap;
1014 struct ieee80211com *ic = ni->ni_ic;
1017 /* NB: preserve ni_table */
1018 if (ni->ni_flags & IEEE80211_NODE_PWR_MGT) {
1019 if (vap->iv_opmode != IEEE80211_M_STA)
1021 ni->ni_flags &= ~IEEE80211_NODE_PWR_MGT;
1022 IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni,
1023 "power save mode off, %u sta's in ps mode", vap->iv_ps_sta);
1026 * Cleanup any HT-related state.
1028 if (ni->ni_flags & IEEE80211_NODE_HT)
1029 ieee80211_ht_node_cleanup(ni);
1030 #ifdef IEEE80211_SUPPORT_SUPERG
1031 /* Always do FF node cleanup; for A-MSDU */
1032 ieee80211_ff_node_cleanup(ni);
1034 #ifdef IEEE80211_SUPPORT_MESH
1036 * Cleanup any mesh-related state.
1038 if (vap->iv_opmode == IEEE80211_M_MBSS)
1039 ieee80211_mesh_node_cleanup(ni);
1042 * Clear any staging queue entries.
1044 ieee80211_ageq_drain_node(&ic->ic_stageq, ni);
1047 * Clear AREF flag that marks the authorization refcnt bump
1048 * has happened. This is probably not needed as the node
1049 * should always be removed from the table so not found but
1050 * do it just in case.
1051 * Likewise clear the ASSOCID flag as these flags are intended
1052 * to be managed in tandem.
1054 ni->ni_flags &= ~(IEEE80211_NODE_AREF | IEEE80211_NODE_ASSOCID);
1057 * Drain power save queue and, if needed, clear TIM.
1059 if (ieee80211_node_psq_drain(ni) != 0 && vap->iv_set_tim != NULL)
1060 vap->iv_set_tim(ni, 0);
1063 if (ni->ni_challenge != NULL) {
1064 IEEE80211_FREE(ni->ni_challenge, M_80211_NODE);
1065 ni->ni_challenge = NULL;
1068 * Preserve SSID, WPA, and WME ie's so the bss node is
1069 * reusable during a re-auth/re-assoc state transition.
1070 * If we remove these data they will not be recreated
1071 * because they come from a probe-response or beacon frame
1072 * which cannot be expected prior to the association-response.
1073 * This should not be an issue when operating in other modes
1074 * as stations leaving always go through a full state transition
1075 * which will rebuild this state.
1077 * XXX does this leave us open to inheriting old state?
1079 for (i = 0; i < nitems(ni->ni_rxfrag); i++)
1080 if (ni->ni_rxfrag[i] != NULL) {
1081 m_freem(ni->ni_rxfrag[i]);
1082 ni->ni_rxfrag[i] = NULL;
1085 * Must be careful here to remove any key map entry w/o a LOR.
1087 ieee80211_node_delucastkey(ni);
1091 node_free(struct ieee80211_node *ni)
1093 struct ieee80211com *ic = ni->ni_ic;
1095 ieee80211_ratectl_node_deinit(ni);
1096 ic->ic_node_cleanup(ni);
1097 ieee80211_ies_cleanup(&ni->ni_ies);
1098 ieee80211_psq_cleanup(&ni->ni_psq);
1099 IEEE80211_FREE(ni, M_80211_NODE);
1103 node_age(struct ieee80211_node *ni)
1105 struct ieee80211vap *vap = ni->ni_vap;
1107 IEEE80211_NODE_LOCK_ASSERT(&vap->iv_ic->ic_sta);
1110 * Age frames on the power save queue.
1112 if (ieee80211_node_psq_age(ni) != 0 &&
1113 ni->ni_psq.psq_len == 0 && vap->iv_set_tim != NULL)
1114 vap->iv_set_tim(ni, 0);
1116 * Age out HT resources (e.g. frames on the
1117 * A-MPDU reorder queues).
1119 if (ni->ni_associd != 0 && (ni->ni_flags & IEEE80211_NODE_HT))
1120 ieee80211_ht_node_age(ni);
1124 node_getrssi(const struct ieee80211_node *ni)
1126 uint32_t avgrssi = ni->ni_avgrssi;
1129 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER)
1131 rssi = IEEE80211_RSSI_GET(avgrssi);
1132 return rssi < 0 ? 0 : rssi > 127 ? 127 : rssi;
1136 node_getsignal(const struct ieee80211_node *ni, int8_t *rssi, int8_t *noise)
1138 *rssi = node_getrssi(ni);
1139 *noise = ni->ni_noise;
1143 node_getmimoinfo(const struct ieee80211_node *ni,
1144 struct ieee80211_mimo_info *info)
1150 bzero(info, sizeof(*info));
1152 for (i = 0; i < ni->ni_mimo_chains; i++) {
1153 avgrssi = ni->ni_mimo_rssi_ctl[i];
1154 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) {
1157 rssi = IEEE80211_RSSI_GET(avgrssi);
1158 info->rssi[i] = rssi < 0 ? 0 : rssi > 127 ? 127 : rssi;
1160 info->noise[i] = ni->ni_mimo_noise_ctl[i];
1163 /* XXX ext radios? */
1168 struct ieee80211_node *
1169 ieee80211_alloc_node(struct ieee80211_node_table *nt,
1170 struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN])
1172 struct ieee80211com *ic = nt->nt_ic;
1173 struct ieee80211_node *ni;
1176 ni = ic->ic_node_alloc(vap, macaddr);
1178 vap->iv_stats.is_rx_nodealloc++;
1182 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1183 "%s %p<%s> in %s table\n", __func__, ni,
1184 ether_sprintf(macaddr), nt->nt_name);
1186 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr);
1187 hash = IEEE80211_NODE_HASH(ic, macaddr);
1188 ieee80211_node_initref(ni); /* mark referenced */
1189 ni->ni_chan = IEEE80211_CHAN_ANYC;
1190 ni->ni_authmode = IEEE80211_AUTH_OPEN;
1191 ni->ni_txpower = ic->ic_txpowlimit; /* max power */
1192 ni->ni_txparms = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)];
1193 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE);
1194 ni->ni_avgrssi = IEEE80211_RSSI_DUMMY_MARKER;
1195 ni->ni_inact_reload = nt->nt_inact_init;
1196 ni->ni_inact = ni->ni_inact_reload;
1197 ni->ni_ath_defkeyix = 0x7fff;
1198 ieee80211_psq_init(&ni->ni_psq, "unknown");
1199 #ifdef IEEE80211_SUPPORT_MESH
1200 if (vap->iv_opmode == IEEE80211_M_MBSS)
1201 ieee80211_mesh_node_init(vap, ni);
1203 IEEE80211_NODE_LOCK(nt);
1204 TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list);
1205 LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash);
1209 IEEE80211_NODE_UNLOCK(nt);
1211 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni,
1212 "%s: inact_reload %u", __func__, ni->ni_inact_reload);
1214 ieee80211_ratectl_node_init(ni);
1220 * Craft a temporary node suitable for sending a management frame
1221 * to the specified station. We craft only as much state as we
1222 * need to do the work since the node will be immediately reclaimed
1223 * once the send completes.
1225 struct ieee80211_node *
1226 ieee80211_tmp_node(struct ieee80211vap *vap,
1227 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1229 struct ieee80211com *ic = vap->iv_ic;
1230 struct ieee80211_node *ni;
1232 ni = ic->ic_node_alloc(vap, macaddr);
1234 struct ieee80211_node *bss = vap->iv_bss;
1236 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1237 "%s %p<%s>\n", __func__, ni, ether_sprintf(macaddr));
1239 ni->ni_table = NULL; /* NB: pedantic */
1240 ni->ni_ic = ic; /* NB: needed to set channel */
1243 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr);
1244 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid);
1245 ieee80211_node_initref(ni); /* mark referenced */
1246 /* NB: required by ieee80211_fix_rate */
1247 ieee80211_node_set_chan(ni, bss->ni_chan);
1248 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey,
1249 IEEE80211_KEYIX_NONE);
1250 ni->ni_txpower = bss->ni_txpower;
1251 /* XXX optimize away */
1252 ieee80211_psq_init(&ni->ni_psq, "unknown");
1254 ieee80211_ratectl_node_init(ni);
1257 vap->iv_stats.is_rx_nodealloc++;
1262 struct ieee80211_node *
1263 ieee80211_dup_bss(struct ieee80211vap *vap,
1264 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1266 struct ieee80211com *ic = vap->iv_ic;
1267 struct ieee80211_node *ni;
1269 ni = ieee80211_alloc_node(&ic->ic_sta, vap, macaddr);
1271 struct ieee80211_node *bss = vap->iv_bss;
1273 * Inherit from iv_bss.
1276 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid);
1277 ieee80211_node_set_chan(ni, bss->ni_chan);
1283 * Create a bss node for a legacy WDS vap. The far end does
1284 * not associate so we just create create a new node and
1285 * simulate an association. The caller is responsible for
1286 * installing the node as the bss node and handling any further
1287 * setup work like authorizing the port.
1289 struct ieee80211_node *
1290 ieee80211_node_create_wds(struct ieee80211vap *vap,
1291 const uint8_t bssid[IEEE80211_ADDR_LEN], struct ieee80211_channel *chan)
1293 struct ieee80211com *ic = vap->iv_ic;
1294 struct ieee80211_node *ni;
1296 /* XXX check if node already in sta table? */
1297 ni = ieee80211_alloc_node(&ic->ic_sta, vap, bssid);
1299 ni->ni_wdsvap = vap;
1300 IEEE80211_ADDR_COPY(ni->ni_bssid, bssid);
1302 * Inherit any manually configured settings.
1304 copy_bss(ni, vap->iv_bss);
1305 ieee80211_node_set_chan(ni, chan);
1306 /* NB: propagate ssid so available to WPA supplicant */
1307 ni->ni_esslen = vap->iv_des_ssid[0].len;
1308 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen);
1309 /* NB: no associd for peer */
1311 * There are no management frames to use to
1312 * discover neighbor capabilities, so blindly
1313 * propagate the local configuration.
1315 if (vap->iv_flags & IEEE80211_F_WME)
1316 ni->ni_flags |= IEEE80211_NODE_QOS;
1317 #ifdef IEEE80211_SUPPORT_SUPERG
1318 if (vap->iv_flags & IEEE80211_F_FF)
1319 ni->ni_flags |= IEEE80211_NODE_FF;
1321 if ((ic->ic_htcaps & IEEE80211_HTC_HT) &&
1322 (vap->iv_flags_ht & IEEE80211_FHT_HT)) {
1324 * Device is HT-capable and HT is enabled for
1325 * the vap; setup HT operation. On return
1326 * ni_chan will be adjusted to an HT channel.
1328 ieee80211_ht_wds_init(ni);
1330 struct ieee80211_channel *c = ni->ni_chan;
1332 * Force a legacy channel to be used.
1334 c = ieee80211_find_channel(ic,
1335 c->ic_freq, c->ic_flags &~ IEEE80211_CHAN_HT);
1336 KASSERT(c != NULL, ("no legacy channel, %u/%x",
1337 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags));
1344 struct ieee80211_node *
1345 #ifdef IEEE80211_DEBUG_REFCNT
1346 ieee80211_find_node_locked_debug(struct ieee80211_node_table *nt,
1347 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line)
1349 ieee80211_find_node_locked(struct ieee80211_node_table *nt,
1350 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1353 struct ieee80211_node *ni;
1356 IEEE80211_NODE_LOCK_ASSERT(nt);
1358 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr);
1359 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) {
1360 if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) {
1361 ieee80211_ref_node(ni); /* mark referenced */
1362 #ifdef IEEE80211_DEBUG_REFCNT
1363 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1364 "%s (%s:%u) %p<%s> refcnt %d\n", __func__,
1366 ni, ether_sprintf(ni->ni_macaddr),
1367 ieee80211_node_refcnt(ni));
1375 struct ieee80211_node *
1376 #ifdef IEEE80211_DEBUG_REFCNT
1377 ieee80211_find_node_debug(struct ieee80211_node_table *nt,
1378 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line)
1380 ieee80211_find_node(struct ieee80211_node_table *nt,
1381 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1384 struct ieee80211_node *ni;
1386 IEEE80211_NODE_LOCK(nt);
1387 ni = ieee80211_find_node_locked(nt, macaddr);
1388 IEEE80211_NODE_UNLOCK(nt);
1392 struct ieee80211_node *
1393 #ifdef IEEE80211_DEBUG_REFCNT
1394 ieee80211_find_vap_node_locked_debug(struct ieee80211_node_table *nt,
1395 const struct ieee80211vap *vap,
1396 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line)
1398 ieee80211_find_vap_node_locked(struct ieee80211_node_table *nt,
1399 const struct ieee80211vap *vap,
1400 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1403 struct ieee80211_node *ni;
1406 IEEE80211_NODE_LOCK_ASSERT(nt);
1408 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr);
1409 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) {
1410 if (ni->ni_vap == vap &&
1411 IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) {
1412 ieee80211_ref_node(ni); /* mark referenced */
1413 #ifdef IEEE80211_DEBUG_REFCNT
1414 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1415 "%s (%s:%u) %p<%s> refcnt %d\n", __func__,
1417 ni, ether_sprintf(ni->ni_macaddr),
1418 ieee80211_node_refcnt(ni));
1426 struct ieee80211_node *
1427 #ifdef IEEE80211_DEBUG_REFCNT
1428 ieee80211_find_vap_node_debug(struct ieee80211_node_table *nt,
1429 const struct ieee80211vap *vap,
1430 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line)
1432 ieee80211_find_vap_node(struct ieee80211_node_table *nt,
1433 const struct ieee80211vap *vap,
1434 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1437 struct ieee80211_node *ni;
1439 IEEE80211_NODE_LOCK(nt);
1440 ni = ieee80211_find_vap_node_locked(nt, vap, macaddr);
1441 IEEE80211_NODE_UNLOCK(nt);
1446 * Fake up a node; this handles node discovery in adhoc mode.
1447 * Note that for the driver's benefit we we treat this like
1448 * an association so the driver has an opportunity to setup
1449 * it's private state.
1451 struct ieee80211_node *
1452 ieee80211_fakeup_adhoc_node(struct ieee80211vap *vap,
1453 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1455 struct ieee80211_node *ni;
1457 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE | IEEE80211_MSG_ASSOC,
1458 "%s: mac<%s>\n", __func__, ether_sprintf(macaddr));
1459 ni = ieee80211_dup_bss(vap, macaddr);
1461 struct ieee80211com *ic = vap->iv_ic;
1463 /* XXX no rate negotiation; just dup */
1464 ni->ni_rates = vap->iv_bss->ni_rates;
1465 if (ieee80211_iserp_rateset(&ni->ni_rates))
1466 ni->ni_flags |= IEEE80211_NODE_ERP;
1467 if (vap->iv_opmode == IEEE80211_M_AHDEMO) {
1469 * In adhoc demo mode there are no management
1470 * frames to use to discover neighbor capabilities,
1471 * so blindly propagate the local configuration
1472 * so we can do interesting things (e.g. use
1473 * WME to disable ACK's).
1475 if (vap->iv_flags & IEEE80211_F_WME)
1476 ni->ni_flags |= IEEE80211_NODE_QOS;
1477 #ifdef IEEE80211_SUPPORT_SUPERG
1478 if (vap->iv_flags & IEEE80211_F_FF)
1479 ni->ni_flags |= IEEE80211_NODE_FF;
1482 ieee80211_node_setuptxparms(ni);
1483 ieee80211_ratectl_node_init(ni);
1484 if (ic->ic_newassoc != NULL)
1485 ic->ic_newassoc(ni, 1);
1486 /* XXX not right for 802.1x/WPA */
1487 ieee80211_node_authorize(ni);
1493 ieee80211_init_neighbor(struct ieee80211_node *ni,
1494 const struct ieee80211_frame *wh,
1495 const struct ieee80211_scanparams *sp)
1497 int do_ht_setup = 0;
1499 ni->ni_esslen = sp->ssid[1];
1500 memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]);
1501 IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3);
1502 memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp));
1503 ni->ni_intval = sp->bintval;
1504 ni->ni_capinfo = sp->capinfo;
1505 ni->ni_chan = ni->ni_ic->ic_curchan;
1506 ni->ni_fhdwell = sp->fhdwell;
1507 ni->ni_fhindex = sp->fhindex;
1508 ni->ni_erp = sp->erp;
1509 ni->ni_timoff = sp->timoff;
1510 #ifdef IEEE80211_SUPPORT_MESH
1511 if (ni->ni_vap->iv_opmode == IEEE80211_M_MBSS)
1512 ieee80211_mesh_init_neighbor(ni, wh, sp);
1514 if (ieee80211_ies_init(&ni->ni_ies, sp->ies, sp->ies_len)) {
1515 ieee80211_ies_expand(&ni->ni_ies);
1516 if (ni->ni_ies.wme_ie != NULL)
1517 ni->ni_flags |= IEEE80211_NODE_QOS;
1519 ni->ni_flags &= ~IEEE80211_NODE_QOS;
1520 #ifdef IEEE80211_SUPPORT_SUPERG
1521 if (ni->ni_ies.ath_ie != NULL)
1522 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie);
1524 if (ni->ni_ies.htcap_ie != NULL)
1525 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie);
1526 if (ni->ni_ies.htinfo_ie != NULL)
1527 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie);
1529 if ((ni->ni_ies.htcap_ie != NULL) &&
1530 (ni->ni_ies.htinfo_ie != NULL) &&
1531 (ni->ni_vap->iv_flags_ht & IEEE80211_FHT_HT)) {
1536 /* NB: must be after ni_chan is setup */
1537 ieee80211_setup_rates(ni, sp->rates, sp->xrates,
1538 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE |
1539 IEEE80211_F_DONEGO | IEEE80211_F_DODEL);
1542 * If the neighbor is HT compatible, flip that on.
1545 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC,
1546 "%s: doing HT setup\n", __func__);
1547 ieee80211_ht_node_init(ni);
1548 ieee80211_ht_updateparams(ni,
1549 ni->ni_ies.htcap_ie,
1550 ni->ni_ies.htinfo_ie);
1551 ieee80211_setup_htrates(ni,
1552 ni->ni_ies.htcap_ie,
1553 IEEE80211_F_JOIN | IEEE80211_F_DOBRS);
1554 ieee80211_setup_basic_htrates(ni,
1555 ni->ni_ies.htinfo_ie);
1556 ieee80211_node_setuptxparms(ni);
1557 ieee80211_ratectl_node_init(ni);
1562 * Do node discovery in adhoc mode on receipt of a beacon
1563 * or probe response frame. Note that for the driver's
1564 * benefit we we treat this like an association so the
1565 * driver has an opportunity to setup it's private state.
1567 struct ieee80211_node *
1568 ieee80211_add_neighbor(struct ieee80211vap *vap,
1569 const struct ieee80211_frame *wh,
1570 const struct ieee80211_scanparams *sp)
1572 struct ieee80211_node *ni;
1574 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC,
1575 "%s: mac<%s>\n", __func__, ether_sprintf(wh->i_addr2));
1576 ni = ieee80211_dup_bss(vap, wh->i_addr2);/* XXX alloc_node? */
1578 struct ieee80211com *ic = vap->iv_ic;
1580 ieee80211_init_neighbor(ni, wh, sp);
1581 if (ieee80211_iserp_rateset(&ni->ni_rates))
1582 ni->ni_flags |= IEEE80211_NODE_ERP;
1583 ieee80211_node_setuptxparms(ni);
1584 ieee80211_ratectl_node_init(ni);
1585 if (ic->ic_newassoc != NULL)
1586 ic->ic_newassoc(ni, 1);
1587 /* XXX not right for 802.1x/WPA */
1588 ieee80211_node_authorize(ni);
1593 #define IS_PROBEREQ(wh) \
1594 ((wh->i_fc[0] & (IEEE80211_FC0_TYPE_MASK|IEEE80211_FC0_SUBTYPE_MASK)) \
1595 == (IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ))
1596 #define IS_BCAST_PROBEREQ(wh) \
1597 (IS_PROBEREQ(wh) && IEEE80211_IS_MULTICAST( \
1598 ((const struct ieee80211_frame *)(wh))->i_addr3))
1600 static __inline struct ieee80211_node *
1601 _find_rxnode(struct ieee80211_node_table *nt,
1602 const struct ieee80211_frame_min *wh)
1604 if (IS_BCAST_PROBEREQ(wh))
1605 return NULL; /* spam bcast probe req to all vap's */
1606 return ieee80211_find_node_locked(nt, wh->i_addr2);
1610 * Locate the node for sender, track state, and then pass the
1611 * (referenced) node up to the 802.11 layer for its use. Note
1612 * we can return NULL if the sender is not in the table.
1614 struct ieee80211_node *
1615 #ifdef IEEE80211_DEBUG_REFCNT
1616 ieee80211_find_rxnode_debug(struct ieee80211com *ic,
1617 const struct ieee80211_frame_min *wh, const char *func, int line)
1619 ieee80211_find_rxnode(struct ieee80211com *ic,
1620 const struct ieee80211_frame_min *wh)
1623 struct ieee80211_node_table *nt;
1624 struct ieee80211_node *ni;
1627 IEEE80211_NODE_LOCK(nt);
1628 ni = _find_rxnode(nt, wh);
1629 IEEE80211_NODE_UNLOCK(nt);
1635 * Like ieee80211_find_rxnode but use the supplied h/w
1636 * key index as a hint to locate the node in the key
1637 * mapping table. If an entry is present at the key
1638 * index we return it; otherwise do a normal lookup and
1639 * update the mapping table if the station has a unicast
1640 * key assigned to it.
1642 struct ieee80211_node *
1643 #ifdef IEEE80211_DEBUG_REFCNT
1644 ieee80211_find_rxnode_withkey_debug(struct ieee80211com *ic,
1645 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix,
1646 const char *func, int line)
1648 ieee80211_find_rxnode_withkey(struct ieee80211com *ic,
1649 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix)
1652 struct ieee80211_node_table *nt;
1653 struct ieee80211_node *ni;
1656 IEEE80211_NODE_LOCK(nt);
1657 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax)
1658 ni = nt->nt_keyixmap[keyix];
1662 ni = _find_rxnode(nt, wh);
1663 if (ni != NULL && nt->nt_keyixmap != NULL) {
1665 * If the station has a unicast key cache slot
1666 * assigned update the key->node mapping table.
1668 keyix = ni->ni_ucastkey.wk_rxkeyix;
1669 /* XXX can keyixmap[keyix] != NULL? */
1670 if (keyix < nt->nt_keyixmax &&
1671 nt->nt_keyixmap[keyix] == NULL) {
1672 IEEE80211_DPRINTF(ni->ni_vap,
1674 "%s: add key map entry %p<%s> refcnt %d\n",
1675 __func__, ni, ether_sprintf(ni->ni_macaddr),
1676 ieee80211_node_refcnt(ni)+1);
1677 nt->nt_keyixmap[keyix] = ieee80211_ref_node(ni);
1681 if (IS_BCAST_PROBEREQ(wh))
1682 ni = NULL; /* spam bcast probe req to all vap's */
1684 ieee80211_ref_node(ni);
1686 IEEE80211_NODE_UNLOCK(nt);
1690 #undef IS_BCAST_PROBEREQ
1694 * Return a reference to the appropriate node for sending
1695 * a data frame. This handles node discovery in adhoc networks.
1697 struct ieee80211_node *
1698 #ifdef IEEE80211_DEBUG_REFCNT
1699 ieee80211_find_txnode_debug(struct ieee80211vap *vap,
1700 const uint8_t macaddr[IEEE80211_ADDR_LEN],
1701 const char *func, int line)
1703 ieee80211_find_txnode(struct ieee80211vap *vap,
1704 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1707 struct ieee80211_node_table *nt = &vap->iv_ic->ic_sta;
1708 struct ieee80211_node *ni;
1711 * The destination address should be in the node table
1712 * unless this is a multicast/broadcast frame. We can
1713 * also optimize station mode operation, all frames go
1716 /* XXX can't hold lock across dup_bss 'cuz of recursive locking */
1717 IEEE80211_NODE_LOCK(nt);
1718 if (vap->iv_opmode == IEEE80211_M_STA ||
1719 vap->iv_opmode == IEEE80211_M_WDS ||
1720 IEEE80211_IS_MULTICAST(macaddr))
1721 ni = ieee80211_ref_node(vap->iv_bss);
1723 ni = ieee80211_find_node_locked(nt, macaddr);
1724 IEEE80211_NODE_UNLOCK(nt);
1727 if (vap->iv_opmode == IEEE80211_M_IBSS ||
1728 vap->iv_opmode == IEEE80211_M_AHDEMO) {
1730 * In adhoc mode cons up a node for the destination.
1731 * Note that we need an additional reference for the
1732 * caller to be consistent with
1733 * ieee80211_find_node_locked.
1735 ni = ieee80211_fakeup_adhoc_node(vap, macaddr);
1737 (void) ieee80211_ref_node(ni);
1739 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, macaddr,
1740 "no node, discard frame (%s)", __func__);
1741 vap->iv_stats.is_tx_nonode++;
1748 _ieee80211_free_node(struct ieee80211_node *ni)
1750 struct ieee80211_node_table *nt = ni->ni_table;
1753 * NB: careful about referencing the vap as it may be
1754 * gone if the last reference was held by a driver.
1755 * We know the com will always be present so it's safe
1756 * to use ni_ic below to reclaim resources.
1759 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1760 "%s %p<%s> in %s table\n", __func__, ni,
1761 ether_sprintf(ni->ni_macaddr),
1762 nt != NULL ? nt->nt_name : "<gone>");
1764 if (ni->ni_associd != 0) {
1765 struct ieee80211vap *vap = ni->ni_vap;
1766 if (vap->iv_aid_bitmap != NULL)
1767 IEEE80211_AID_CLR(vap, ni->ni_associd);
1770 TAILQ_REMOVE(&nt->nt_node, ni, ni_list);
1771 LIST_REMOVE(ni, ni_hash);
1773 ni->ni_ic->ic_node_free(ni);
1777 * Clear any entry in the unicast key mapping table.
1780 node_clear_keyixmap(struct ieee80211_node_table *nt, struct ieee80211_node *ni)
1782 ieee80211_keyix keyix;
1784 keyix = ni->ni_ucastkey.wk_rxkeyix;
1785 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax &&
1786 nt->nt_keyixmap[keyix] == ni) {
1787 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1788 "%s: %p<%s> clear key map entry %u\n",
1789 __func__, ni, ether_sprintf(ni->ni_macaddr), keyix);
1790 nt->nt_keyixmap[keyix] = NULL;
1791 ieee80211_node_decref(ni);
1799 #ifdef IEEE80211_DEBUG_REFCNT
1800 ieee80211_free_node_debug(struct ieee80211_node *ni, const char *func, int line)
1802 ieee80211_free_node(struct ieee80211_node *ni)
1805 struct ieee80211_node_table *nt = ni->ni_table;
1807 #ifdef IEEE80211_DEBUG_REFCNT
1808 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1809 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni,
1810 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1);
1813 IEEE80211_NODE_LOCK(nt);
1814 if (ieee80211_node_dectestref(ni)) {
1816 * Last reference, reclaim state.
1818 _ieee80211_free_node(ni);
1819 } else if (ieee80211_node_refcnt(ni) == 1)
1820 if (node_clear_keyixmap(nt, ni))
1821 _ieee80211_free_node(ni);
1822 IEEE80211_NODE_UNLOCK(nt);
1824 if (ieee80211_node_dectestref(ni))
1825 _ieee80211_free_node(ni);
1830 * Reclaim a unicast key and clear any key cache state.
1833 ieee80211_node_delucastkey(struct ieee80211_node *ni)
1835 struct ieee80211com *ic = ni->ni_ic;
1836 struct ieee80211_node_table *nt = &ic->ic_sta;
1837 struct ieee80211_node *nikey;
1838 ieee80211_keyix keyix;
1839 int isowned, status;
1842 * NB: We must beware of LOR here; deleting the key
1843 * can cause the crypto layer to block traffic updates
1844 * which can generate a LOR against the node table lock;
1845 * grab it here and stash the key index for our use below.
1847 * Must also beware of recursion on the node table lock.
1848 * When called from node_cleanup we may already have
1849 * the node table lock held. Unfortunately there's no
1850 * way to separate out this path so we must do this
1853 isowned = IEEE80211_NODE_IS_LOCKED(nt);
1855 IEEE80211_NODE_LOCK(nt);
1857 status = 1; /* NB: success */
1858 if (ni->ni_ucastkey.wk_keyix != IEEE80211_KEYIX_NONE) {
1859 keyix = ni->ni_ucastkey.wk_rxkeyix;
1860 status = ieee80211_crypto_delkey(ni->ni_vap, &ni->ni_ucastkey);
1861 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) {
1862 nikey = nt->nt_keyixmap[keyix];
1863 nt->nt_keyixmap[keyix] = NULL;
1867 IEEE80211_NODE_UNLOCK(nt);
1869 if (nikey != NULL) {
1870 KASSERT(nikey == ni,
1871 ("key map out of sync, ni %p nikey %p", ni, nikey));
1872 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1873 "%s: delete key map entry %p<%s> refcnt %d\n",
1874 __func__, ni, ether_sprintf(ni->ni_macaddr),
1875 ieee80211_node_refcnt(ni)-1);
1876 ieee80211_free_node(ni);
1882 * Reclaim a node. If this is the last reference count then
1883 * do the normal free work. Otherwise remove it from the node
1884 * table and mark it gone by clearing the back-reference.
1887 node_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni)
1890 IEEE80211_NODE_LOCK_ASSERT(nt);
1892 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1893 "%s: remove %p<%s> from %s table, refcnt %d\n",
1894 __func__, ni, ether_sprintf(ni->ni_macaddr),
1895 nt->nt_name, ieee80211_node_refcnt(ni)-1);
1897 * Clear any entry in the unicast key mapping table.
1898 * We need to do it here so rx lookups don't find it
1899 * in the mapping table even if it's not in the hash
1900 * table. We cannot depend on the mapping table entry
1901 * being cleared because the node may not be free'd.
1903 (void)node_clear_keyixmap(nt, ni);
1904 if (!ieee80211_node_dectestref(ni)) {
1906 * Other references are present, just remove the
1907 * node from the table so it cannot be found. When
1908 * the references are dropped storage will be
1911 TAILQ_REMOVE(&nt->nt_node, ni, ni_list);
1912 LIST_REMOVE(ni, ni_hash);
1913 ni->ni_table = NULL; /* clear reference */
1915 _ieee80211_free_node(ni);
1919 * Node table support.
1923 ieee80211_node_table_init(struct ieee80211com *ic,
1924 struct ieee80211_node_table *nt,
1925 const char *name, int inact, int keyixmax)
1929 IEEE80211_NODE_LOCK_INIT(nt, ic->ic_name);
1930 IEEE80211_NODE_ITERATE_LOCK_INIT(nt, ic->ic_name);
1931 TAILQ_INIT(&nt->nt_node);
1934 nt->nt_inact_init = inact;
1935 nt->nt_keyixmax = keyixmax;
1936 if (nt->nt_keyixmax > 0) {
1937 nt->nt_keyixmap = (struct ieee80211_node **) IEEE80211_MALLOC(
1938 keyixmax * sizeof(struct ieee80211_node *),
1940 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
1941 if (nt->nt_keyixmap == NULL)
1943 "Cannot allocate key index map with %u entries\n",
1946 nt->nt_keyixmap = NULL;
1950 ieee80211_node_table_reset(struct ieee80211_node_table *nt,
1951 struct ieee80211vap *match)
1953 struct ieee80211_node *ni, *next;
1955 IEEE80211_NODE_LOCK(nt);
1956 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) {
1957 if (match != NULL && ni->ni_vap != match)
1959 /* XXX can this happen? if so need's work */
1960 if (ni->ni_associd != 0) {
1961 struct ieee80211vap *vap = ni->ni_vap;
1963 if (vap->iv_auth->ia_node_leave != NULL)
1964 vap->iv_auth->ia_node_leave(ni);
1965 if (vap->iv_aid_bitmap != NULL)
1966 IEEE80211_AID_CLR(vap, ni->ni_associd);
1968 ni->ni_wdsvap = NULL; /* clear reference */
1969 node_reclaim(nt, ni);
1971 if (match != NULL && match->iv_opmode == IEEE80211_M_WDS) {
1973 * Make a separate pass to clear references to this vap
1974 * held by DWDS entries. They will not be matched above
1975 * because ni_vap will point to the ap vap but we still
1976 * need to clear ni_wdsvap when the WDS vap is destroyed
1979 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next)
1980 if (ni->ni_wdsvap == match)
1981 ni->ni_wdsvap = NULL;
1983 IEEE80211_NODE_UNLOCK(nt);
1987 ieee80211_node_table_cleanup(struct ieee80211_node_table *nt)
1989 ieee80211_node_table_reset(nt, NULL);
1990 if (nt->nt_keyixmap != NULL) {
1992 /* XXX verify all entries are NULL */
1994 for (i = 0; i < nt->nt_keyixmax; i++)
1995 if (nt->nt_keyixmap[i] != NULL)
1996 printf("%s: %s[%u] still active\n", __func__,
1999 IEEE80211_FREE(nt->nt_keyixmap, M_80211_NODE);
2000 nt->nt_keyixmap = NULL;
2002 IEEE80211_NODE_ITERATE_LOCK_DESTROY(nt);
2003 IEEE80211_NODE_LOCK_DESTROY(nt);
2007 * Timeout inactive stations and do related housekeeping.
2008 * Note that we cannot hold the node lock while sending a
2009 * frame as this would lead to a LOR. Instead we use a
2010 * generation number to mark nodes that we've scanned and
2011 * drop the lock and restart a scan if we have to time out
2012 * a node. Since we are single-threaded by virtue of
2013 * controlling the inactivity timer we can be sure this will
2014 * process each node only once.
2017 ieee80211_timeout_stations(struct ieee80211com *ic)
2019 struct ieee80211_node_table *nt = &ic->ic_sta;
2020 struct ieee80211vap *vap;
2021 struct ieee80211_node *ni;
2024 IEEE80211_NODE_ITERATE_LOCK(nt);
2025 gen = ++nt->nt_scangen;
2027 IEEE80211_NODE_LOCK(nt);
2028 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) {
2029 if (ni->ni_scangen == gen) /* previously handled */
2031 ni->ni_scangen = gen;
2033 * Ignore entries for which have yet to receive an
2034 * authentication frame. These are transient and
2035 * will be reclaimed when the last reference to them
2036 * goes away (when frame xmits complete).
2040 * Only process stations when in RUN state. This
2041 * insures, for example, that we don't timeout an
2042 * inactive station during CAC. Note that CSA state
2043 * is actually handled in ieee80211_node_timeout as
2044 * it applies to more than timeout processing.
2046 if (vap->iv_state != IEEE80211_S_RUN)
2048 /* XXX can vap be NULL? */
2049 if ((vap->iv_opmode == IEEE80211_M_HOSTAP ||
2050 vap->iv_opmode == IEEE80211_M_STA) &&
2051 (ni->ni_flags & IEEE80211_NODE_AREF) == 0)
2054 * Free fragment if not needed anymore
2055 * (last fragment older than 1s).
2056 * XXX doesn't belong here, move to node_age
2058 if (ni->ni_rxfrag[0] != NULL &&
2059 ticks > ni->ni_rxfragstamp + hz) {
2060 m_freem(ni->ni_rxfrag[0]);
2061 ni->ni_rxfrag[0] = NULL;
2063 if (ni->ni_inact > 0) {
2065 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni,
2066 "%s: inact %u inact_reload %u nrates %u",
2067 __func__, ni->ni_inact, ni->ni_inact_reload,
2068 ni->ni_rates.rs_nrates);
2071 * Special case ourself; we may be idle for extended periods
2072 * of time and regardless reclaiming our state is wrong.
2073 * XXX run ic_node_age
2075 if (ni == vap->iv_bss)
2077 if (ni->ni_associd != 0 ||
2078 (vap->iv_opmode == IEEE80211_M_IBSS ||
2079 vap->iv_opmode == IEEE80211_M_AHDEMO)) {
2081 * Age/drain resources held by the station.
2083 ic->ic_node_age(ni);
2085 * Probe the station before time it out. We
2086 * send a null data frame which may not be
2087 * universally supported by drivers (need it
2088 * for ps-poll support so it should be...).
2090 * XXX don't probe the station unless we've
2091 * received a frame from them (and have
2092 * some idea of the rates they are capable
2093 * of); this will get fixed more properly
2094 * soon with better handling of the rate set.
2096 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) &&
2097 (0 < ni->ni_inact &&
2098 ni->ni_inact <= vap->iv_inact_probe) &&
2099 ni->ni_rates.rs_nrates != 0) {
2101 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE,
2103 "probe station due to inactivity");
2105 * Grab a reference before unlocking the table
2106 * so the node cannot be reclaimed before we
2107 * send the frame. ieee80211_send_nulldata
2108 * understands we've done this and reclaims the
2109 * ref for us as needed.
2111 ieee80211_ref_node(ni);
2112 IEEE80211_NODE_UNLOCK(nt);
2113 ieee80211_send_nulldata(ni);
2118 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) &&
2119 ni->ni_inact <= 0) {
2121 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, ni,
2122 "station timed out due to inactivity "
2123 "(refcnt %u)", ieee80211_node_refcnt(ni));
2125 * Send a deauthenticate frame and drop the station.
2126 * This is somewhat complicated due to reference counts
2127 * and locking. At this point a station will typically
2128 * have a reference count of 1. ieee80211_node_leave
2129 * will do a "free" of the node which will drop the
2130 * reference count. But in the meantime a reference
2131 * wil be held by the deauth frame. The actual reclaim
2132 * of the node will happen either after the tx is
2133 * completed or by ieee80211_node_leave.
2135 * Separately we must drop the node lock before sending
2136 * in case the driver takes a lock, as this can result
2137 * in a LOR between the node lock and the driver lock.
2139 ieee80211_ref_node(ni);
2140 IEEE80211_NODE_UNLOCK(nt);
2141 if (ni->ni_associd != 0) {
2142 IEEE80211_SEND_MGMT(ni,
2143 IEEE80211_FC0_SUBTYPE_DEAUTH,
2144 IEEE80211_REASON_AUTH_EXPIRE);
2146 ieee80211_node_leave(ni);
2147 ieee80211_free_node(ni);
2148 vap->iv_stats.is_node_timeout++;
2152 IEEE80211_NODE_UNLOCK(nt);
2154 IEEE80211_NODE_ITERATE_UNLOCK(nt);
2158 * Aggressively reclaim resources. This should be used
2159 * only in a critical situation to reclaim mbuf resources.
2162 ieee80211_drain(struct ieee80211com *ic)
2164 struct ieee80211_node_table *nt = &ic->ic_sta;
2165 struct ieee80211vap *vap;
2166 struct ieee80211_node *ni;
2168 IEEE80211_NODE_LOCK(nt);
2169 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) {
2171 * Ignore entries for which have yet to receive an
2172 * authentication frame. These are transient and
2173 * will be reclaimed when the last reference to them
2174 * goes away (when frame xmits complete).
2178 * Only process stations when in RUN state. This
2179 * insures, for example, that we don't timeout an
2180 * inactive station during CAC. Note that CSA state
2181 * is actually handled in ieee80211_node_timeout as
2182 * it applies to more than timeout processing.
2184 if (vap->iv_state != IEEE80211_S_RUN)
2186 /* XXX can vap be NULL? */
2187 if ((vap->iv_opmode == IEEE80211_M_HOSTAP ||
2188 vap->iv_opmode == IEEE80211_M_STA) &&
2189 (ni->ni_flags & IEEE80211_NODE_AREF) == 0)
2193 * XXX doesn't belong here, move to node_drain
2195 if (ni->ni_rxfrag[0] != NULL) {
2196 m_freem(ni->ni_rxfrag[0]);
2197 ni->ni_rxfrag[0] = NULL;
2200 * Drain resources held by the station.
2202 ic->ic_node_drain(ni);
2204 IEEE80211_NODE_UNLOCK(nt);
2208 * Per-ieee80211com inactivity timer callback.
2211 ieee80211_node_timeout(void *arg)
2213 struct ieee80211com *ic = arg;
2216 * Defer timeout processing if a channel switch is pending.
2217 * We typically need to be mute so not doing things that
2218 * might generate frames is good to handle in one place.
2219 * Supressing the station timeout processing may extend the
2220 * lifetime of inactive stations (by not decrementing their
2221 * idle counters) but this should be ok unless the CSA is
2222 * active for an unusually long time.
2224 if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) {
2225 ieee80211_scan_timeout(ic);
2226 ieee80211_timeout_stations(ic);
2227 ieee80211_ageq_age(&ic->ic_stageq, IEEE80211_INACT_WAIT);
2230 ieee80211_erp_timeout(ic);
2231 ieee80211_ht_timeout(ic);
2232 IEEE80211_UNLOCK(ic);
2234 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz,
2235 ieee80211_node_timeout, ic);
2239 * Iterate over the node table and return an array of ref'ed nodes.
2241 * This is separated out from calling the actual node function so that
2242 * no LORs will occur.
2244 * If there are too many nodes (ie, the number of nodes doesn't fit
2245 * within 'max_aid' entries) then the node references will be freed
2246 * and an error will be returned.
2248 * The responsibility of allocating and freeing "ni_arr" is up to
2252 ieee80211_iterate_nt(struct ieee80211_node_table *nt,
2253 struct ieee80211_node **ni_arr, uint16_t max_aid)
2257 struct ieee80211_node *ni;
2259 IEEE80211_NODE_ITERATE_LOCK(nt);
2260 IEEE80211_NODE_LOCK(nt);
2262 gen = ++nt->nt_scangen;
2266 * We simply assume here that since the node
2267 * scan generation doesn't change (as
2268 * we are holding both the node table and
2269 * node table iteration locks), we can simply
2270 * assign it to the node here.
2272 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) {
2275 ic_printf(nt->nt_ic, "Node array overflow: max=%u",
2279 ni_arr[i] = ieee80211_ref_node(ni);
2280 ni_arr[i]->ni_scangen = gen;
2285 * It's safe to unlock here.
2287 * If we're successful, the list is returned.
2288 * If we're unsuccessful, the list is ignored
2289 * and we remove our references.
2291 * This avoids any potential LOR with
2292 * ieee80211_free_node().
2294 IEEE80211_NODE_UNLOCK(nt);
2295 IEEE80211_NODE_ITERATE_UNLOCK(nt);
2298 * If ret is non-zero, we hit some kind of error.
2299 * Rather than walking some nodes, we'll walk none
2303 for (j = 0; j < i; j++) {
2304 /* ieee80211_free_node() locks by itself */
2305 ieee80211_free_node(ni_arr[j]);
2313 * Just a wrapper, so we don't have to change every ieee80211_iterate_nodes()
2314 * reference in the source.
2316 * Note that this fetches 'max_aid' from the first VAP, rather than finding
2317 * the largest max_aid from all VAPs.
2320 ieee80211_iterate_nodes(struct ieee80211_node_table *nt,
2321 ieee80211_iter_func *f, void *arg)
2323 struct ieee80211_node **ni_arr;
2327 struct ieee80211vap *vap;
2329 /* Overdoing it default */
2330 max_aid = IEEE80211_AID_MAX;
2332 /* Handle the case of there being no vaps just yet */
2333 vap = TAILQ_FIRST(&nt->nt_ic->ic_vaps);
2335 max_aid = vap->iv_max_aid;
2337 size = max_aid * sizeof(struct ieee80211_node *);
2338 ni_arr = (struct ieee80211_node **) IEEE80211_MALLOC(size, M_80211_NODE,
2339 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
2344 * If this fails, the node table won't have any
2345 * valid entries - ieee80211_iterate_nt() frees
2346 * the references to them. So don't try walking
2347 * the table; just skip to the end and free the
2350 if (ieee80211_iterate_nt(nt, ni_arr, max_aid) != 0)
2353 for (i = 0; i < max_aid; i++) {
2354 if (ni_arr[i] == NULL) /* end of the list */
2356 (*f)(arg, ni_arr[i]);
2357 /* ieee80211_free_node() locks by itself */
2358 ieee80211_free_node(ni_arr[i]);
2362 IEEE80211_FREE(ni_arr, M_80211_NODE);
2366 ieee80211_dump_node(struct ieee80211_node_table *nt, struct ieee80211_node *ni)
2368 printf("0x%p: mac %s refcnt %d\n", ni,
2369 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni));
2370 printf("\tscangen %u authmode %u flags 0x%x\n",
2371 ni->ni_scangen, ni->ni_authmode, ni->ni_flags);
2372 printf("\tassocid 0x%x txpower %u vlan %u\n",
2373 ni->ni_associd, ni->ni_txpower, ni->ni_vlan);
2374 printf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n",
2375 ni->ni_txseqs[IEEE80211_NONQOS_TID],
2376 ni->ni_rxseqs[IEEE80211_NONQOS_TID] >> IEEE80211_SEQ_SEQ_SHIFT,
2377 ni->ni_rxseqs[IEEE80211_NONQOS_TID] & IEEE80211_SEQ_FRAG_MASK,
2378 ni->ni_rxfragstamp);
2379 printf("\trssi %d noise %d intval %u capinfo 0x%x\n",
2380 node_getrssi(ni), ni->ni_noise,
2381 ni->ni_intval, ni->ni_capinfo);
2382 printf("\tbssid %s essid \"%.*s\" channel %u:0x%x\n",
2383 ether_sprintf(ni->ni_bssid),
2384 ni->ni_esslen, ni->ni_essid,
2385 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags);
2386 printf("\tinact %u inact_reload %u txrate %u\n",
2387 ni->ni_inact, ni->ni_inact_reload, ni->ni_txrate);
2388 printf("\thtcap %x htparam %x htctlchan %u ht2ndchan %u\n",
2389 ni->ni_htcap, ni->ni_htparam,
2390 ni->ni_htctlchan, ni->ni_ht2ndchan);
2391 printf("\thtopmode %x htstbc %x chw %u\n",
2392 ni->ni_htopmode, ni->ni_htstbc, ni->ni_chw);
2396 ieee80211_dump_nodes(struct ieee80211_node_table *nt)
2398 ieee80211_iterate_nodes(nt,
2399 (ieee80211_iter_func *) ieee80211_dump_node, nt);
2403 ieee80211_notify_erp_locked(struct ieee80211com *ic)
2405 struct ieee80211vap *vap;
2407 IEEE80211_LOCK_ASSERT(ic);
2409 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
2410 if (vap->iv_opmode == IEEE80211_M_HOSTAP)
2411 ieee80211_beacon_notify(vap, IEEE80211_BEACON_ERP);
2415 ieee80211_notify_erp(struct ieee80211com *ic)
2418 ieee80211_notify_erp_locked(ic);
2419 IEEE80211_UNLOCK(ic);
2423 * Handle a station joining an 11g network.
2426 ieee80211_node_join_11g(struct ieee80211_node *ni)
2428 struct ieee80211com *ic = ni->ni_ic;
2430 IEEE80211_LOCK_ASSERT(ic);
2433 * Station isn't capable of short slot time. Bump
2434 * the count of long slot time stations and disable
2435 * use of short slot time. Note that the actual switch
2436 * over to long slot time use may not occur until the
2437 * next beacon transmission (per sec. 7.3.1.4 of 11g).
2439 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) {
2440 ic->ic_longslotsta++;
2441 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2442 "station needs long slot time, count %d",
2443 ic->ic_longslotsta);
2444 /* XXX vap's w/ conflicting needs won't work */
2445 if (!IEEE80211_IS_CHAN_108G(ic->ic_bsschan)) {
2447 * Don't force slot time when switched to turbo
2448 * mode as non-ERP stations won't be present; this
2449 * need only be done when on the normal G channel.
2451 ieee80211_set_shortslottime(ic, 0);
2455 * If the new station is not an ERP station
2456 * then bump the counter and enable protection
2459 if (!ieee80211_iserp_rateset(&ni->ni_rates)) {
2461 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2462 "station is !ERP, %d non-ERP stations associated",
2465 * If station does not support short preamble
2466 * then we must enable use of Barker preamble.
2468 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) {
2469 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2470 "%s", "station needs long preamble");
2471 ic->ic_flags |= IEEE80211_F_USEBARKER;
2472 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE;
2475 * If protection is configured and this is the first
2476 * indication we should use protection, enable it.
2478 if (ic->ic_protmode != IEEE80211_PROT_NONE &&
2479 ic->ic_nonerpsta == 1 &&
2480 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) {
2481 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC,
2482 "%s: enable use of protection\n", __func__);
2483 ic->ic_flags |= IEEE80211_F_USEPROT;
2484 ieee80211_notify_erp_locked(ic);
2487 ni->ni_flags |= IEEE80211_NODE_ERP;
2491 ieee80211_node_join(struct ieee80211_node *ni, int resp)
2493 struct ieee80211com *ic = ni->ni_ic;
2494 struct ieee80211vap *vap = ni->ni_vap;
2497 if (ni->ni_associd == 0) {
2500 KASSERT(vap->iv_aid_bitmap != NULL, ("no aid bitmap"));
2502 * It would be good to search the bitmap
2503 * more efficiently, but this will do for now.
2505 for (aid = 1; aid < vap->iv_max_aid; aid++) {
2506 if (!IEEE80211_AID_ISSET(vap, aid))
2509 if (aid >= vap->iv_max_aid) {
2510 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_TOOMANY);
2511 ieee80211_node_leave(ni);
2514 ni->ni_associd = aid | 0xc000;
2515 ni->ni_jointime = time_uptime;
2517 IEEE80211_AID_SET(vap, ni->ni_associd);
2518 vap->iv_sta_assoc++;
2521 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan))
2522 ieee80211_ht_node_join(ni);
2523 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) &&
2524 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan))
2525 ieee80211_node_join_11g(ni);
2526 IEEE80211_UNLOCK(ic);
2532 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni,
2533 "station associated at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s",
2534 IEEE80211_NODE_AID(ni),
2535 ic->ic_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long",
2536 ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long",
2537 ic->ic_flags & IEEE80211_F_USEPROT ? ", protection" : "",
2538 ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "",
2539 ni->ni_flags & IEEE80211_NODE_HT ?
2540 (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "",
2541 ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "",
2542 ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" :
2543 ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "",
2544 ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "",
2545 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ?
2546 ", fast-frames" : "",
2547 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ?
2551 ieee80211_node_setuptxparms(ni);
2552 ieee80211_ratectl_node_init(ni);
2553 /* give driver a chance to setup state like ni_txrate */
2554 if (ic->ic_newassoc != NULL)
2555 ic->ic_newassoc(ni, newassoc);
2556 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_SUCCESS);
2557 /* tell the authenticator about new station */
2558 if (vap->iv_auth->ia_node_join != NULL)
2559 vap->iv_auth->ia_node_join(ni);
2560 ieee80211_notify_node_join(ni,
2561 resp == IEEE80211_FC0_SUBTYPE_ASSOC_RESP);
2565 disable_protection(struct ieee80211com *ic)
2567 KASSERT(ic->ic_nonerpsta == 0 &&
2568 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0,
2569 ("%d non ERP stations, flags 0x%x", ic->ic_nonerpsta,
2572 ic->ic_flags &= ~IEEE80211_F_USEPROT;
2573 /* XXX verify mode? */
2574 if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) {
2575 ic->ic_flags |= IEEE80211_F_SHPREAMBLE;
2576 ic->ic_flags &= ~IEEE80211_F_USEBARKER;
2578 ieee80211_notify_erp_locked(ic);
2582 * Handle a station leaving an 11g network.
2585 ieee80211_node_leave_11g(struct ieee80211_node *ni)
2587 struct ieee80211com *ic = ni->ni_ic;
2589 IEEE80211_LOCK_ASSERT(ic);
2591 KASSERT(IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan),
2592 ("not in 11g, bss %u:0x%x", ic->ic_bsschan->ic_freq,
2593 ic->ic_bsschan->ic_flags));
2596 * If a long slot station do the slot time bookkeeping.
2598 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) {
2599 KASSERT(ic->ic_longslotsta > 0,
2600 ("bogus long slot station count %d", ic->ic_longslotsta));
2601 ic->ic_longslotsta--;
2602 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2603 "long slot time station leaves, count now %d",
2604 ic->ic_longslotsta);
2605 if (ic->ic_longslotsta == 0) {
2607 * Re-enable use of short slot time if supported
2608 * and not operating in IBSS mode (per spec).
2610 if ((ic->ic_caps & IEEE80211_C_SHSLOT) &&
2611 ic->ic_opmode != IEEE80211_M_IBSS) {
2612 IEEE80211_DPRINTF(ni->ni_vap,
2613 IEEE80211_MSG_ASSOC,
2614 "%s: re-enable use of short slot time\n",
2616 ieee80211_set_shortslottime(ic, 1);
2621 * If a non-ERP station do the protection-related bookkeeping.
2623 if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) {
2624 KASSERT(ic->ic_nonerpsta > 0,
2625 ("bogus non-ERP station count %d", ic->ic_nonerpsta));
2627 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2628 "non-ERP station leaves, count now %d%s", ic->ic_nonerpsta,
2629 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) ?
2630 " (non-ERP sta present)" : "");
2631 if (ic->ic_nonerpsta == 0 &&
2632 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) {
2633 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC,
2634 "%s: disable use of protection\n", __func__);
2635 disable_protection(ic);
2641 * Time out presence of an overlapping bss with non-ERP
2642 * stations. When operating in hostap mode we listen for
2643 * beacons from other stations and if we identify a non-ERP
2644 * station is present we enable protection. To identify
2645 * when all non-ERP stations are gone we time out this
2649 ieee80211_erp_timeout(struct ieee80211com *ic)
2652 IEEE80211_LOCK_ASSERT(ic);
2654 if ((ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) &&
2655 ieee80211_time_after(ticks, ic->ic_lastnonerp + IEEE80211_NONERP_PRESENT_AGE)) {
2657 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni,
2658 "%s", "age out non-ERP sta present on channel");
2660 ic->ic_flags_ext &= ~IEEE80211_FEXT_NONERP_PR;
2661 if (ic->ic_nonerpsta == 0)
2662 disable_protection(ic);
2667 * Handle bookkeeping for station deauthentication/disassociation
2668 * when operating as an ap.
2671 ieee80211_node_leave(struct ieee80211_node *ni)
2673 struct ieee80211com *ic = ni->ni_ic;
2674 struct ieee80211vap *vap = ni->ni_vap;
2675 struct ieee80211_node_table *nt = ni->ni_table;
2677 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni,
2678 "station with aid %d leaves", IEEE80211_NODE_AID(ni));
2680 KASSERT(vap->iv_opmode != IEEE80211_M_STA,
2681 ("unexpected operating mode %u", vap->iv_opmode));
2683 * If node wasn't previously associated all
2684 * we need to do is reclaim the reference.
2686 /* XXX ibss mode bypasses 11g and notification */
2687 if (ni->ni_associd == 0)
2690 * Tell the authenticator the station is leaving.
2691 * Note that we must do this before yanking the
2692 * association id as the authenticator uses the
2693 * associd to locate it's state block.
2695 if (vap->iv_auth->ia_node_leave != NULL)
2696 vap->iv_auth->ia_node_leave(ni);
2699 IEEE80211_AID_CLR(vap, ni->ni_associd);
2700 vap->iv_sta_assoc--;
2703 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan))
2704 ieee80211_ht_node_leave(ni);
2705 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) &&
2706 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan))
2707 ieee80211_node_leave_11g(ni);
2708 IEEE80211_UNLOCK(ic);
2710 * Cleanup station state. In particular clear various
2711 * state that might otherwise be reused if the node
2712 * is reused before the reference count goes to zero
2713 * (and memory is reclaimed).
2715 ieee80211_sta_leave(ni);
2718 * Remove the node from any table it's recorded in and
2719 * drop the caller's reference. Removal from the table
2720 * is important to insure the node is not reprocessed
2724 IEEE80211_NODE_LOCK(nt);
2725 node_reclaim(nt, ni);
2726 IEEE80211_NODE_UNLOCK(nt);
2728 ieee80211_free_node(ni);
2732 struct ieee80211vap *vap;
2734 uint32_t rssi_total;
2738 get_hostap_rssi(void *arg, struct ieee80211_node *ni)
2740 struct rssiinfo *info = arg;
2741 struct ieee80211vap *vap = ni->ni_vap;
2744 if (info->vap != vap)
2746 /* only associated stations */
2747 if (ni->ni_associd == 0)
2749 rssi = vap->iv_ic->ic_node_getrssi(ni);
2751 info->rssi_samples++;
2752 info->rssi_total += rssi;
2757 get_adhoc_rssi(void *arg, struct ieee80211_node *ni)
2759 struct rssiinfo *info = arg;
2760 struct ieee80211vap *vap = ni->ni_vap;
2763 if (info->vap != vap)
2765 /* only neighbors */
2766 /* XXX check bssid */
2767 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0)
2769 rssi = vap->iv_ic->ic_node_getrssi(ni);
2771 info->rssi_samples++;
2772 info->rssi_total += rssi;
2776 #ifdef IEEE80211_SUPPORT_MESH
2778 get_mesh_rssi(void *arg, struct ieee80211_node *ni)
2780 struct rssiinfo *info = arg;
2781 struct ieee80211vap *vap = ni->ni_vap;
2784 if (info->vap != vap)
2786 /* only neighbors that peered successfully */
2787 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED)
2789 rssi = vap->iv_ic->ic_node_getrssi(ni);
2791 info->rssi_samples++;
2792 info->rssi_total += rssi;
2795 #endif /* IEEE80211_SUPPORT_MESH */
2798 ieee80211_getrssi(struct ieee80211vap *vap)
2800 #define NZ(x) ((x) == 0 ? 1 : (x))
2801 struct ieee80211com *ic = vap->iv_ic;
2802 struct rssiinfo info;
2804 info.rssi_total = 0;
2805 info.rssi_samples = 0;
2807 switch (vap->iv_opmode) {
2808 case IEEE80211_M_IBSS: /* average of all ibss neighbors */
2809 case IEEE80211_M_AHDEMO: /* average of all neighbors */
2810 ieee80211_iterate_nodes(&ic->ic_sta, get_adhoc_rssi, &info);
2812 case IEEE80211_M_HOSTAP: /* average of all associated stations */
2813 ieee80211_iterate_nodes(&ic->ic_sta, get_hostap_rssi, &info);
2815 #ifdef IEEE80211_SUPPORT_MESH
2816 case IEEE80211_M_MBSS: /* average of all mesh neighbors */
2817 ieee80211_iterate_nodes(&ic->ic_sta, get_mesh_rssi, &info);
2820 case IEEE80211_M_MONITOR: /* XXX */
2821 case IEEE80211_M_STA: /* use stats from associated ap */
2823 if (vap->iv_bss != NULL)
2824 info.rssi_total = ic->ic_node_getrssi(vap->iv_bss);
2825 info.rssi_samples = 1;
2828 return info.rssi_total / NZ(info.rssi_samples);
2833 ieee80211_getsignal(struct ieee80211vap *vap, int8_t *rssi, int8_t *noise)
2836 if (vap->iv_bss == NULL) /* NB: shouldn't happen */
2838 vap->iv_ic->ic_node_getsignal(vap->iv_bss, rssi, noise);
2839 /* for non-station mode return avg'd rssi accounting */
2840 if (vap->iv_opmode != IEEE80211_M_STA)
2841 *rssi = ieee80211_getrssi(vap);