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%c\n", __func__,
334 ieee80211_opmode_name[vap->iv_opmode],
335 ieee80211_chan2ieee(ic, chan),
336 ieee80211_channel_type_char(chan));
338 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr);
343 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr);
344 ni->ni_esslen = vap->iv_des_ssid[0].len;
345 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen);
346 if (vap->iv_bss != NULL)
347 copy_bss(ni, vap->iv_bss);
348 ni->ni_intval = ic->ic_bintval;
349 if (vap->iv_flags & IEEE80211_F_PRIVACY)
350 ni->ni_capinfo |= IEEE80211_CAPINFO_PRIVACY;
351 if (ic->ic_phytype == IEEE80211_T_FH) {
352 ni->ni_fhdwell = 200; /* XXX */
355 if (vap->iv_opmode == IEEE80211_M_IBSS) {
356 vap->iv_flags |= IEEE80211_F_SIBSS;
357 ni->ni_capinfo |= IEEE80211_CAPINFO_IBSS; /* XXX */
358 if (vap->iv_flags & IEEE80211_F_DESBSSID)
359 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid);
361 get_random_bytes(ni->ni_bssid, IEEE80211_ADDR_LEN);
362 /* clear group bit, add local bit */
363 ni->ni_bssid[0] = (ni->ni_bssid[0] &~ 0x01) | 0x02;
365 } else if (vap->iv_opmode == IEEE80211_M_AHDEMO) {
366 if (vap->iv_flags & IEEE80211_F_DESBSSID)
367 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid);
369 #ifdef IEEE80211_SUPPORT_TDMA
370 if ((vap->iv_caps & IEEE80211_C_TDMA) == 0)
372 memset(ni->ni_bssid, 0, IEEE80211_ADDR_LEN);
373 #ifdef IEEE80211_SUPPORT_MESH
374 } else if (vap->iv_opmode == IEEE80211_M_MBSS) {
375 ni->ni_meshidlen = vap->iv_mesh->ms_idlen;
376 memcpy(ni->ni_meshid, vap->iv_mesh->ms_id, ni->ni_meshidlen);
380 * Fix the channel and related attributes.
382 /* clear DFS CAC state on previous channel */
383 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC &&
384 ic->ic_bsschan->ic_freq != chan->ic_freq &&
385 IEEE80211_IS_CHAN_CACDONE(ic->ic_bsschan))
386 ieee80211_dfs_cac_clear(ic, ic->ic_bsschan);
387 ic->ic_bsschan = chan;
388 ieee80211_node_set_chan(ni, chan);
389 ic->ic_curmode = ieee80211_chan2mode(chan);
391 * Do mode-specific setup.
393 if (IEEE80211_IS_CHAN_FULL(chan)) {
394 if (IEEE80211_IS_CHAN_ANYG(chan)) {
396 * Use a mixed 11b/11g basic rate set.
398 ieee80211_setbasicrates(&ni->ni_rates,
400 if (vap->iv_flags & IEEE80211_F_PUREG) {
402 * Also mark OFDM rates basic so 11b
403 * stations do not join (WiFi compliance).
405 ieee80211_addbasicrates(&ni->ni_rates,
408 } else if (IEEE80211_IS_CHAN_B(chan)) {
410 * Force pure 11b rate set.
412 ieee80211_setbasicrates(&ni->ni_rates,
417 (void) ieee80211_sta_join1(ieee80211_ref_node(ni));
421 * Reset bss state on transition to the INIT state.
422 * Clear any stations from the table (they have been
423 * deauth'd) and reset the bss node (clears key, rate
427 ieee80211_reset_bss(struct ieee80211vap *vap)
429 struct ieee80211com *ic = vap->iv_ic;
430 struct ieee80211_node *ni, *obss;
432 ieee80211_node_table_reset(&ic->ic_sta, vap);
433 /* XXX multi-bss: wrong */
434 ieee80211_reset_erp(ic);
436 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr);
437 KASSERT(ni != NULL, ("unable to setup initial BSS node"));
439 vap->iv_bss = ieee80211_ref_node(ni);
442 ni->ni_intval = ic->ic_bintval;
443 ieee80211_free_node(obss);
445 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr);
449 match_ssid(const struct ieee80211_node *ni,
450 int nssid, const struct ieee80211_scan_ssid ssids[])
454 for (i = 0; i < nssid; i++) {
455 if (ni->ni_esslen == ssids[i].len &&
456 memcmp(ni->ni_essid, ssids[i].ssid, ni->ni_esslen) == 0)
463 * Test a node for suitability/compatibility.
466 check_bss(struct ieee80211vap *vap, struct ieee80211_node *ni)
468 struct ieee80211com *ic = ni->ni_ic;
471 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan)))
473 if (vap->iv_opmode == IEEE80211_M_IBSS) {
474 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0)
477 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0)
480 if (vap->iv_flags & IEEE80211_F_PRIVACY) {
481 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0)
484 /* XXX does this mean privacy is supported or required? */
485 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY)
488 rate = ieee80211_fix_rate(ni, &ni->ni_rates,
489 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE);
490 if (rate & IEEE80211_RATE_BASIC)
492 if (vap->iv_des_nssid != 0 &&
493 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid))
495 if ((vap->iv_flags & IEEE80211_F_DESBSSID) &&
496 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid))
501 #ifdef IEEE80211_DEBUG
503 * Display node suitability/compatibility.
506 check_bss_debug(struct ieee80211vap *vap, struct ieee80211_node *ni)
508 struct ieee80211com *ic = ni->ni_ic;
513 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan)))
515 if (vap->iv_opmode == IEEE80211_M_IBSS) {
516 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0)
519 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0)
522 if (vap->iv_flags & IEEE80211_F_PRIVACY) {
523 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0)
526 /* XXX does this mean privacy is supported or required? */
527 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY)
530 rate = ieee80211_fix_rate(ni, &ni->ni_rates,
531 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE);
532 if (rate & IEEE80211_RATE_BASIC)
534 if (vap->iv_des_nssid != 0 &&
535 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid))
537 if ((vap->iv_flags & IEEE80211_F_DESBSSID) &&
538 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid))
541 printf(" %c %s", fail ? '-' : '+', ether_sprintf(ni->ni_macaddr));
542 printf(" %s%c", ether_sprintf(ni->ni_bssid), fail & 0x20 ? '!' : ' ');
544 ieee80211_chan2ieee(ic, ni->ni_chan), fail & 0x01 ? '!' : ' ');
545 printf(" %2dM%c", (rate & IEEE80211_RATE_VAL) / 2,
546 fail & 0x08 ? '!' : ' ');
548 (ni->ni_capinfo & IEEE80211_CAPINFO_ESS) ? "ess" :
549 (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) ? "ibss" :
551 fail & 0x02 ? '!' : ' ');
553 (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) ? "wep" : "no",
554 fail & 0x04 ? '!' : ' ');
555 ieee80211_print_essid(ni->ni_essid, ni->ni_esslen);
556 printf("%s\n", fail & 0x10 ? "!" : "");
558 #endif /* IEEE80211_DEBUG */
562 ieee80211_ibss_merge_check(struct ieee80211_node *ni)
564 struct ieee80211vap *vap = ni->ni_vap;
566 if (ni == vap->iv_bss ||
567 IEEE80211_ADDR_EQ(ni->ni_bssid, vap->iv_bss->ni_bssid)) {
568 /* unchanged, nothing to do */
572 if (!check_bss(vap, ni)) {
573 /* capabilities mismatch */
574 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC,
575 "%s: merge failed, capabilities mismatch\n", __func__);
576 #ifdef IEEE80211_DEBUG
577 if (ieee80211_msg_assoc(vap))
578 check_bss_debug(vap, ni);
580 vap->iv_stats.is_ibss_capmismatch++;
588 * Handle 802.11 ad hoc network merge. The
589 * convention, set by the Wireless Ethernet Compatibility Alliance
590 * (WECA), is that an 802.11 station will change its BSSID to match
591 * the "oldest" 802.11 ad hoc network, on the same channel, that
592 * has the station's desired SSID. The "oldest" 802.11 network
593 * sends beacons with the greatest TSF timestamp.
595 * The caller is assumed to validate TSF's before attempting a merge.
597 * Return !0 if the BSSID changed, 0 otherwise.
600 ieee80211_ibss_merge(struct ieee80211_node *ni)
602 #ifdef IEEE80211_DEBUG
603 struct ieee80211vap *vap = ni->ni_vap;
604 struct ieee80211com *ic = ni->ni_ic;
607 if (! ieee80211_ibss_merge_check(ni))
610 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC,
611 "%s: new bssid %s: %s preamble, %s slot time%s\n", __func__,
612 ether_sprintf(ni->ni_bssid),
613 ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long",
614 ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long",
615 ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : ""
617 return ieee80211_sta_join1(ieee80211_ref_node(ni));
621 * Calculate HT channel promotion flags for all vaps.
622 * This assumes ni_chan have been setup for each vap.
625 gethtadjustflags(struct ieee80211com *ic)
627 struct ieee80211vap *vap;
632 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
633 if (vap->iv_state < IEEE80211_S_RUN)
635 switch (vap->iv_opmode) {
636 case IEEE80211_M_WDS:
637 case IEEE80211_M_STA:
638 case IEEE80211_M_AHDEMO:
639 case IEEE80211_M_HOSTAP:
640 case IEEE80211_M_IBSS:
641 case IEEE80211_M_MBSS:
642 flags |= ieee80211_htchanflags(vap->iv_bss->ni_chan);
652 * Check if the current channel needs to change based on whether
653 * any vap's are using HT20/HT40. This is used to sync the state
654 * of ic_curchan after a channel width change on a running vap.
657 ieee80211_sync_curchan(struct ieee80211com *ic)
659 struct ieee80211_channel *c;
661 c = ieee80211_ht_adjust_channel(ic, ic->ic_curchan, gethtadjustflags(ic));
662 if (c != ic->ic_curchan) {
664 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan);
665 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan);
666 IEEE80211_UNLOCK(ic);
667 ic->ic_set_channel(ic);
668 ieee80211_radiotap_chan_change(ic);
674 * Setup the current channel. The request channel may be
675 * promoted if other vap's are operating with HT20/HT40.
678 ieee80211_setupcurchan(struct ieee80211com *ic, struct ieee80211_channel *c)
680 if (ic->ic_htcaps & IEEE80211_HTC_HT) {
681 int flags = gethtadjustflags(ic);
683 * Check for channel promotion required to support the
684 * set of running vap's. This assumes we are called
685 * after ni_chan is setup for each vap.
687 /* NB: this assumes IEEE80211_FHT_USEHT40 > IEEE80211_FHT_HT */
688 if (flags > ieee80211_htchanflags(c))
689 c = ieee80211_ht_adjust_channel(ic, c, flags);
691 ic->ic_bsschan = ic->ic_curchan = c;
692 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan);
693 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan);
697 * Change the current channel. The channel change is guaranteed to have
698 * happened before the next state change.
701 ieee80211_setcurchan(struct ieee80211com *ic, struct ieee80211_channel *c)
703 ieee80211_setupcurchan(ic, c);
704 ieee80211_runtask(ic, &ic->ic_chan_task);
708 ieee80211_update_chw(struct ieee80211com *ic)
711 ieee80211_setupcurchan(ic, ic->ic_curchan);
712 ieee80211_runtask(ic, &ic->ic_chw_task);
716 * Join the specified IBSS/BSS network. The node is assumed to
717 * be passed in with a held reference.
720 ieee80211_sta_join1(struct ieee80211_node *selbs)
722 struct ieee80211vap *vap = selbs->ni_vap;
723 struct ieee80211com *ic = selbs->ni_ic;
724 struct ieee80211_node *obss;
728 * Committed to selbs, setup state.
732 * Check if old+new node have the same address in which
733 * case we can reassociate when operating in sta mode.
735 canreassoc = (obss != NULL &&
736 vap->iv_state == IEEE80211_S_RUN &&
737 IEEE80211_ADDR_EQ(obss->ni_macaddr, selbs->ni_macaddr));
738 vap->iv_bss = selbs; /* NB: caller assumed to bump refcnt */
740 struct ieee80211_node_table *nt = obss->ni_table;
742 copy_bss(selbs, obss);
743 ieee80211_node_decref(obss); /* iv_bss reference */
745 IEEE80211_NODE_LOCK(nt);
746 node_reclaim(nt, obss); /* station table reference */
747 IEEE80211_NODE_UNLOCK(nt);
749 obss = NULL; /* NB: guard against later use */
753 * Delete unusable rates; we've already checked
754 * that the negotiated rate set is acceptable.
756 ieee80211_fix_rate(vap->iv_bss, &vap->iv_bss->ni_rates,
757 IEEE80211_F_DODEL | IEEE80211_F_JOIN);
759 ieee80211_setcurchan(ic, selbs->ni_chan);
761 * Set the erp state (mostly the slot time) to deal with
762 * the auto-select case; this should be redundant if the
765 ieee80211_reset_erp(ic);
766 ieee80211_wme_initparams(vap);
768 if (vap->iv_opmode == IEEE80211_M_STA) {
771 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 1);
774 * Act as if we received a DEAUTH frame in case we
775 * are invoked from the RUN state. This will cause
776 * us to try to re-authenticate if we are operating
779 ieee80211_new_state(vap, IEEE80211_S_AUTH,
780 IEEE80211_FC0_SUBTYPE_DEAUTH);
783 ieee80211_new_state(vap, IEEE80211_S_RUN, -1);
788 ieee80211_sta_join(struct ieee80211vap *vap, struct ieee80211_channel *chan,
789 const struct ieee80211_scan_entry *se)
791 struct ieee80211com *ic = vap->iv_ic;
792 struct ieee80211_node *ni;
794 ni = ieee80211_alloc_node(&ic->ic_sta, vap, se->se_macaddr);
801 * Expand scan state into node's format.
802 * XXX may not need all this stuff
804 IEEE80211_ADDR_COPY(ni->ni_bssid, se->se_bssid);
805 ni->ni_esslen = se->se_ssid[1];
806 memcpy(ni->ni_essid, se->se_ssid+2, ni->ni_esslen);
807 ni->ni_tstamp.tsf = se->se_tstamp.tsf;
808 ni->ni_intval = se->se_intval;
809 ni->ni_capinfo = se->se_capinfo;
811 ni->ni_timoff = se->se_timoff;
812 ni->ni_fhdwell = se->se_fhdwell;
813 ni->ni_fhindex = se->se_fhindex;
814 ni->ni_erp = se->se_erp;
815 IEEE80211_RSSI_LPF(ni->ni_avgrssi, se->se_rssi);
816 ni->ni_noise = se->se_noise;
817 if (vap->iv_opmode == IEEE80211_M_STA) {
818 /* NB: only infrastructure mode requires an associd */
819 ni->ni_flags |= IEEE80211_NODE_ASSOCID;
822 if (ieee80211_ies_init(&ni->ni_ies, se->se_ies.data, se->se_ies.len)) {
823 ieee80211_ies_expand(&ni->ni_ies);
824 #ifdef IEEE80211_SUPPORT_SUPERG
825 if (ni->ni_ies.ath_ie != NULL)
826 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie);
828 if (ni->ni_ies.htcap_ie != NULL)
829 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie);
830 if (ni->ni_ies.htinfo_ie != NULL)
831 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie);
832 #ifdef IEEE80211_SUPPORT_MESH
833 if (ni->ni_ies.meshid_ie != NULL)
834 ieee80211_parse_meshid(ni, ni->ni_ies.meshid_ie);
836 #ifdef IEEE80211_SUPPORT_TDMA
837 if (ni->ni_ies.tdma_ie != NULL)
838 ieee80211_parse_tdma(ni, ni->ni_ies.tdma_ie);
842 vap->iv_dtim_period = se->se_dtimperiod;
843 vap->iv_dtim_count = 0;
845 /* NB: must be after ni_chan is setup */
846 ieee80211_setup_rates(ni, se->se_rates, se->se_xrates,
848 if (ieee80211_iserp_rateset(&ni->ni_rates))
849 ni->ni_flags |= IEEE80211_NODE_ERP;
852 * Setup HT state for this node if it's available, otherwise
853 * non-STA modes won't pick this state up.
855 * For IBSS and related modes that don't go through an
856 * association request/response, the only appropriate place
857 * to setup the HT state is here.
859 if (ni->ni_ies.htinfo_ie != NULL &&
860 ni->ni_ies.htcap_ie != NULL &&
861 vap->iv_flags_ht & IEEE80211_FHT_HT) {
862 ieee80211_ht_node_init(ni);
863 ieee80211_ht_updateparams(ni,
865 ni->ni_ies.htinfo_ie);
866 ieee80211_setup_htrates(ni, ni->ni_ies.htcap_ie,
867 IEEE80211_F_JOIN | IEEE80211_F_DOBRS);
868 ieee80211_setup_basic_htrates(ni, ni->ni_ies.htinfo_ie);
870 /* XXX else check for ath FF? */
871 /* XXX QoS? Difficult given that WME config is specific to a master */
873 ieee80211_node_setuptxparms(ni);
874 ieee80211_ratectl_node_init(ni);
876 return ieee80211_sta_join1(ieee80211_ref_node(ni));
880 * Leave the specified IBSS/BSS network. The node is assumed to
881 * be passed in with a held reference.
884 ieee80211_sta_leave(struct ieee80211_node *ni)
886 struct ieee80211com *ic = ni->ni_ic;
888 ic->ic_node_cleanup(ni);
889 ieee80211_notify_node_leave(ni);
893 * Send a deauthenticate frame and drop the station.
896 ieee80211_node_deauth(struct ieee80211_node *ni, int reason)
898 /* NB: bump the refcnt to be sure temporary nodes are not reclaimed */
899 ieee80211_ref_node(ni);
900 if (ni->ni_associd != 0)
901 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH, reason);
902 ieee80211_node_leave(ni);
903 ieee80211_free_node(ni);
906 static struct ieee80211_node *
907 node_alloc(struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN])
909 struct ieee80211_node *ni;
911 ni = (struct ieee80211_node *) IEEE80211_MALLOC(sizeof(struct ieee80211_node),
912 M_80211_NODE, IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
917 * Initialize an ie blob with the specified data. If previous
918 * data exists re-use the data block. As a side effect we clear
919 * all references to specific ie's; the caller is required to
923 ieee80211_ies_init(struct ieee80211_ies *ies, const uint8_t *data, int len)
925 /* NB: assumes data+len are the last fields */
926 memset(ies, 0, offsetof(struct ieee80211_ies, data));
927 if (ies->data != NULL && ies->len != len) {
928 /* data size changed */
929 IEEE80211_FREE(ies->data, M_80211_NODE_IE);
932 if (ies->data == NULL) {
933 ies->data = (uint8_t *) IEEE80211_MALLOC(len, M_80211_NODE_IE,
934 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
935 if (ies->data == NULL) {
937 /* NB: pointers have already been zero'd above */
941 memcpy(ies->data, data, len);
947 * Reclaim storage for an ie blob.
950 ieee80211_ies_cleanup(struct ieee80211_ies *ies)
952 if (ies->data != NULL)
953 IEEE80211_FREE(ies->data, M_80211_NODE_IE);
957 * Expand an ie blob data contents and to fillin individual
958 * ie pointers. The data blob is assumed to be well-formed;
959 * we don't do any validity checking of ie lengths.
962 ieee80211_ies_expand(struct ieee80211_ies *ies)
971 case IEEE80211_ELEMID_VENDOR:
974 else if (iswmeoui(ie))
976 #ifdef IEEE80211_SUPPORT_SUPERG
977 else if (isatherosoui(ie))
980 #ifdef IEEE80211_SUPPORT_TDMA
981 else if (istdmaoui(ie))
985 case IEEE80211_ELEMID_RSN:
988 case IEEE80211_ELEMID_HTCAP:
991 case IEEE80211_ELEMID_HTINFO:
994 #ifdef IEEE80211_SUPPORT_MESH
995 case IEEE80211_ELEMID_MESHID:
1006 * Reclaim any resources in a node and reset any critical
1007 * state. Typically nodes are free'd immediately after,
1008 * but in some cases the storage may be reused so we need
1009 * to insure consistent state (should probably fix that).
1012 node_cleanup(struct ieee80211_node *ni)
1014 struct ieee80211vap *vap = ni->ni_vap;
1015 struct ieee80211com *ic = ni->ni_ic;
1018 /* NB: preserve ni_table */
1019 if (ni->ni_flags & IEEE80211_NODE_PWR_MGT) {
1020 if (vap->iv_opmode != IEEE80211_M_STA)
1022 ni->ni_flags &= ~IEEE80211_NODE_PWR_MGT;
1023 IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni,
1024 "power save mode off, %u sta's in ps mode", vap->iv_ps_sta);
1027 * Cleanup any HT-related state.
1029 if (ni->ni_flags & IEEE80211_NODE_HT)
1030 ieee80211_ht_node_cleanup(ni);
1031 #ifdef IEEE80211_SUPPORT_SUPERG
1032 /* Always do FF node cleanup; for A-MSDU */
1033 ieee80211_ff_node_cleanup(ni);
1035 #ifdef IEEE80211_SUPPORT_MESH
1037 * Cleanup any mesh-related state.
1039 if (vap->iv_opmode == IEEE80211_M_MBSS)
1040 ieee80211_mesh_node_cleanup(ni);
1043 * Clear any staging queue entries.
1045 ieee80211_ageq_drain_node(&ic->ic_stageq, ni);
1048 * Clear AREF flag that marks the authorization refcnt bump
1049 * has happened. This is probably not needed as the node
1050 * should always be removed from the table so not found but
1051 * do it just in case.
1052 * Likewise clear the ASSOCID flag as these flags are intended
1053 * to be managed in tandem.
1055 ni->ni_flags &= ~(IEEE80211_NODE_AREF | IEEE80211_NODE_ASSOCID);
1058 * Drain power save queue and, if needed, clear TIM.
1060 if (ieee80211_node_psq_drain(ni) != 0 && vap->iv_set_tim != NULL)
1061 vap->iv_set_tim(ni, 0);
1064 if (ni->ni_challenge != NULL) {
1065 IEEE80211_FREE(ni->ni_challenge, M_80211_NODE);
1066 ni->ni_challenge = NULL;
1069 * Preserve SSID, WPA, and WME ie's so the bss node is
1070 * reusable during a re-auth/re-assoc state transition.
1071 * If we remove these data they will not be recreated
1072 * because they come from a probe-response or beacon frame
1073 * which cannot be expected prior to the association-response.
1074 * This should not be an issue when operating in other modes
1075 * as stations leaving always go through a full state transition
1076 * which will rebuild this state.
1078 * XXX does this leave us open to inheriting old state?
1080 for (i = 0; i < nitems(ni->ni_rxfrag); i++)
1081 if (ni->ni_rxfrag[i] != NULL) {
1082 m_freem(ni->ni_rxfrag[i]);
1083 ni->ni_rxfrag[i] = NULL;
1086 * Must be careful here to remove any key map entry w/o a LOR.
1088 ieee80211_node_delucastkey(ni);
1092 node_free(struct ieee80211_node *ni)
1094 struct ieee80211com *ic = ni->ni_ic;
1096 ieee80211_ratectl_node_deinit(ni);
1097 ic->ic_node_cleanup(ni);
1098 ieee80211_ies_cleanup(&ni->ni_ies);
1099 ieee80211_psq_cleanup(&ni->ni_psq);
1100 IEEE80211_FREE(ni, M_80211_NODE);
1104 node_age(struct ieee80211_node *ni)
1106 struct ieee80211vap *vap = ni->ni_vap;
1108 IEEE80211_NODE_LOCK_ASSERT(&vap->iv_ic->ic_sta);
1111 * Age frames on the power save queue.
1113 if (ieee80211_node_psq_age(ni) != 0 &&
1114 ni->ni_psq.psq_len == 0 && vap->iv_set_tim != NULL)
1115 vap->iv_set_tim(ni, 0);
1117 * Age out HT resources (e.g. frames on the
1118 * A-MPDU reorder queues).
1120 if (ni->ni_associd != 0 && (ni->ni_flags & IEEE80211_NODE_HT))
1121 ieee80211_ht_node_age(ni);
1125 node_getrssi(const struct ieee80211_node *ni)
1127 uint32_t avgrssi = ni->ni_avgrssi;
1130 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER)
1132 rssi = IEEE80211_RSSI_GET(avgrssi);
1133 return rssi < 0 ? 0 : rssi > 127 ? 127 : rssi;
1137 node_getsignal(const struct ieee80211_node *ni, int8_t *rssi, int8_t *noise)
1139 *rssi = node_getrssi(ni);
1140 *noise = ni->ni_noise;
1144 node_getmimoinfo(const struct ieee80211_node *ni,
1145 struct ieee80211_mimo_info *info)
1151 bzero(info, sizeof(*info));
1153 for (i = 0; i < ni->ni_mimo_chains; i++) {
1154 avgrssi = ni->ni_mimo_rssi_ctl[i];
1155 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) {
1158 rssi = IEEE80211_RSSI_GET(avgrssi);
1159 info->rssi[i] = rssi < 0 ? 0 : rssi > 127 ? 127 : rssi;
1161 info->noise[i] = ni->ni_mimo_noise_ctl[i];
1164 /* XXX ext radios? */
1169 struct ieee80211_node *
1170 ieee80211_alloc_node(struct ieee80211_node_table *nt,
1171 struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN])
1173 struct ieee80211com *ic = nt->nt_ic;
1174 struct ieee80211_node *ni;
1177 ni = ic->ic_node_alloc(vap, macaddr);
1179 vap->iv_stats.is_rx_nodealloc++;
1183 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1184 "%s %p<%s> in %s table\n", __func__, ni,
1185 ether_sprintf(macaddr), nt->nt_name);
1187 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr);
1188 hash = IEEE80211_NODE_HASH(ic, macaddr);
1189 ieee80211_node_initref(ni); /* mark referenced */
1190 ni->ni_chan = IEEE80211_CHAN_ANYC;
1191 ni->ni_authmode = IEEE80211_AUTH_OPEN;
1192 ni->ni_txpower = ic->ic_txpowlimit; /* max power */
1193 ni->ni_txparms = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)];
1194 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE);
1195 ni->ni_avgrssi = IEEE80211_RSSI_DUMMY_MARKER;
1196 ni->ni_inact_reload = nt->nt_inact_init;
1197 ni->ni_inact = ni->ni_inact_reload;
1198 ni->ni_ath_defkeyix = 0x7fff;
1199 ieee80211_psq_init(&ni->ni_psq, "unknown");
1200 #ifdef IEEE80211_SUPPORT_MESH
1201 if (vap->iv_opmode == IEEE80211_M_MBSS)
1202 ieee80211_mesh_node_init(vap, ni);
1204 IEEE80211_NODE_LOCK(nt);
1205 TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list);
1206 LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash);
1210 IEEE80211_NODE_UNLOCK(nt);
1212 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni,
1213 "%s: inact_reload %u", __func__, ni->ni_inact_reload);
1215 ieee80211_ratectl_node_init(ni);
1221 * Craft a temporary node suitable for sending a management frame
1222 * to the specified station. We craft only as much state as we
1223 * need to do the work since the node will be immediately reclaimed
1224 * once the send completes.
1226 struct ieee80211_node *
1227 ieee80211_tmp_node(struct ieee80211vap *vap,
1228 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1230 struct ieee80211com *ic = vap->iv_ic;
1231 struct ieee80211_node *ni;
1233 ni = ic->ic_node_alloc(vap, macaddr);
1235 struct ieee80211_node *bss = vap->iv_bss;
1237 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1238 "%s %p<%s>\n", __func__, ni, ether_sprintf(macaddr));
1240 ni->ni_table = NULL; /* NB: pedantic */
1241 ni->ni_ic = ic; /* NB: needed to set channel */
1244 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr);
1245 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid);
1246 ieee80211_node_initref(ni); /* mark referenced */
1247 /* NB: required by ieee80211_fix_rate */
1248 ieee80211_node_set_chan(ni, bss->ni_chan);
1249 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey,
1250 IEEE80211_KEYIX_NONE);
1251 ni->ni_txpower = bss->ni_txpower;
1252 /* XXX optimize away */
1253 ieee80211_psq_init(&ni->ni_psq, "unknown");
1255 ieee80211_ratectl_node_init(ni);
1258 vap->iv_stats.is_rx_nodealloc++;
1263 struct ieee80211_node *
1264 ieee80211_dup_bss(struct ieee80211vap *vap,
1265 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1267 struct ieee80211com *ic = vap->iv_ic;
1268 struct ieee80211_node *ni;
1270 ni = ieee80211_alloc_node(&ic->ic_sta, vap, macaddr);
1272 struct ieee80211_node *bss = vap->iv_bss;
1274 * Inherit from iv_bss.
1277 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid);
1278 ieee80211_node_set_chan(ni, bss->ni_chan);
1284 * Create a bss node for a legacy WDS vap. The far end does
1285 * not associate so we just create create a new node and
1286 * simulate an association. The caller is responsible for
1287 * installing the node as the bss node and handling any further
1288 * setup work like authorizing the port.
1290 struct ieee80211_node *
1291 ieee80211_node_create_wds(struct ieee80211vap *vap,
1292 const uint8_t bssid[IEEE80211_ADDR_LEN], struct ieee80211_channel *chan)
1294 struct ieee80211com *ic = vap->iv_ic;
1295 struct ieee80211_node *ni;
1297 /* XXX check if node already in sta table? */
1298 ni = ieee80211_alloc_node(&ic->ic_sta, vap, bssid);
1300 ni->ni_wdsvap = vap;
1301 IEEE80211_ADDR_COPY(ni->ni_bssid, bssid);
1303 * Inherit any manually configured settings.
1305 copy_bss(ni, vap->iv_bss);
1306 ieee80211_node_set_chan(ni, chan);
1307 /* NB: propagate ssid so available to WPA supplicant */
1308 ni->ni_esslen = vap->iv_des_ssid[0].len;
1309 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen);
1310 /* NB: no associd for peer */
1312 * There are no management frames to use to
1313 * discover neighbor capabilities, so blindly
1314 * propagate the local configuration.
1316 if (vap->iv_flags & IEEE80211_F_WME)
1317 ni->ni_flags |= IEEE80211_NODE_QOS;
1318 #ifdef IEEE80211_SUPPORT_SUPERG
1319 if (vap->iv_flags & IEEE80211_F_FF)
1320 ni->ni_flags |= IEEE80211_NODE_FF;
1322 if ((ic->ic_htcaps & IEEE80211_HTC_HT) &&
1323 (vap->iv_flags_ht & IEEE80211_FHT_HT)) {
1325 * Device is HT-capable and HT is enabled for
1326 * the vap; setup HT operation. On return
1327 * ni_chan will be adjusted to an HT channel.
1329 ieee80211_ht_wds_init(ni);
1331 struct ieee80211_channel *c = ni->ni_chan;
1333 * Force a legacy channel to be used.
1335 c = ieee80211_find_channel(ic,
1336 c->ic_freq, c->ic_flags &~ IEEE80211_CHAN_HT);
1337 KASSERT(c != NULL, ("no legacy channel, %u/%x",
1338 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags));
1345 struct ieee80211_node *
1346 #ifdef IEEE80211_DEBUG_REFCNT
1347 ieee80211_find_node_locked_debug(struct ieee80211_node_table *nt,
1348 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line)
1350 ieee80211_find_node_locked(struct ieee80211_node_table *nt,
1351 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1354 struct ieee80211_node *ni;
1357 IEEE80211_NODE_LOCK_ASSERT(nt);
1359 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr);
1360 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) {
1361 if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) {
1362 ieee80211_ref_node(ni); /* mark referenced */
1363 #ifdef IEEE80211_DEBUG_REFCNT
1364 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1365 "%s (%s:%u) %p<%s> refcnt %d\n", __func__,
1367 ni, ether_sprintf(ni->ni_macaddr),
1368 ieee80211_node_refcnt(ni));
1376 struct ieee80211_node *
1377 #ifdef IEEE80211_DEBUG_REFCNT
1378 ieee80211_find_node_debug(struct ieee80211_node_table *nt,
1379 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line)
1381 ieee80211_find_node(struct ieee80211_node_table *nt,
1382 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1385 struct ieee80211_node *ni;
1387 IEEE80211_NODE_LOCK(nt);
1388 ni = ieee80211_find_node_locked(nt, macaddr);
1389 IEEE80211_NODE_UNLOCK(nt);
1393 struct ieee80211_node *
1394 #ifdef IEEE80211_DEBUG_REFCNT
1395 ieee80211_find_vap_node_locked_debug(struct ieee80211_node_table *nt,
1396 const struct ieee80211vap *vap,
1397 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line)
1399 ieee80211_find_vap_node_locked(struct ieee80211_node_table *nt,
1400 const struct ieee80211vap *vap,
1401 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1404 struct ieee80211_node *ni;
1407 IEEE80211_NODE_LOCK_ASSERT(nt);
1409 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr);
1410 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) {
1411 if (ni->ni_vap == vap &&
1412 IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) {
1413 ieee80211_ref_node(ni); /* mark referenced */
1414 #ifdef IEEE80211_DEBUG_REFCNT
1415 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1416 "%s (%s:%u) %p<%s> refcnt %d\n", __func__,
1418 ni, ether_sprintf(ni->ni_macaddr),
1419 ieee80211_node_refcnt(ni));
1427 struct ieee80211_node *
1428 #ifdef IEEE80211_DEBUG_REFCNT
1429 ieee80211_find_vap_node_debug(struct ieee80211_node_table *nt,
1430 const struct ieee80211vap *vap,
1431 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line)
1433 ieee80211_find_vap_node(struct ieee80211_node_table *nt,
1434 const struct ieee80211vap *vap,
1435 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1438 struct ieee80211_node *ni;
1440 IEEE80211_NODE_LOCK(nt);
1441 ni = ieee80211_find_vap_node_locked(nt, vap, macaddr);
1442 IEEE80211_NODE_UNLOCK(nt);
1447 * Fake up a node; this handles node discovery in adhoc mode.
1448 * Note that for the driver's benefit we we treat this like
1449 * an association so the driver has an opportunity to setup
1450 * it's private state.
1452 struct ieee80211_node *
1453 ieee80211_fakeup_adhoc_node(struct ieee80211vap *vap,
1454 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1456 struct ieee80211_node *ni;
1458 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE | IEEE80211_MSG_ASSOC,
1459 "%s: mac<%s>\n", __func__, ether_sprintf(macaddr));
1460 ni = ieee80211_dup_bss(vap, macaddr);
1462 struct ieee80211com *ic = vap->iv_ic;
1464 /* XXX no rate negotiation; just dup */
1465 ni->ni_rates = vap->iv_bss->ni_rates;
1466 if (ieee80211_iserp_rateset(&ni->ni_rates))
1467 ni->ni_flags |= IEEE80211_NODE_ERP;
1468 if (vap->iv_opmode == IEEE80211_M_AHDEMO) {
1470 * In adhoc demo mode there are no management
1471 * frames to use to discover neighbor capabilities,
1472 * so blindly propagate the local configuration
1473 * so we can do interesting things (e.g. use
1474 * WME to disable ACK's).
1476 if (vap->iv_flags & IEEE80211_F_WME)
1477 ni->ni_flags |= IEEE80211_NODE_QOS;
1478 #ifdef IEEE80211_SUPPORT_SUPERG
1479 if (vap->iv_flags & IEEE80211_F_FF)
1480 ni->ni_flags |= IEEE80211_NODE_FF;
1483 ieee80211_node_setuptxparms(ni);
1484 ieee80211_ratectl_node_init(ni);
1485 if (ic->ic_newassoc != NULL)
1486 ic->ic_newassoc(ni, 1);
1487 /* XXX not right for 802.1x/WPA */
1488 ieee80211_node_authorize(ni);
1494 ieee80211_init_neighbor(struct ieee80211_node *ni,
1495 const struct ieee80211_frame *wh,
1496 const struct ieee80211_scanparams *sp)
1498 int do_ht_setup = 0;
1500 ni->ni_esslen = sp->ssid[1];
1501 memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]);
1502 IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3);
1503 memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp));
1504 ni->ni_intval = sp->bintval;
1505 ni->ni_capinfo = sp->capinfo;
1506 ni->ni_chan = ni->ni_ic->ic_curchan;
1507 ni->ni_fhdwell = sp->fhdwell;
1508 ni->ni_fhindex = sp->fhindex;
1509 ni->ni_erp = sp->erp;
1510 ni->ni_timoff = sp->timoff;
1511 #ifdef IEEE80211_SUPPORT_MESH
1512 if (ni->ni_vap->iv_opmode == IEEE80211_M_MBSS)
1513 ieee80211_mesh_init_neighbor(ni, wh, sp);
1515 if (ieee80211_ies_init(&ni->ni_ies, sp->ies, sp->ies_len)) {
1516 ieee80211_ies_expand(&ni->ni_ies);
1517 if (ni->ni_ies.wme_ie != NULL)
1518 ni->ni_flags |= IEEE80211_NODE_QOS;
1520 ni->ni_flags &= ~IEEE80211_NODE_QOS;
1521 #ifdef IEEE80211_SUPPORT_SUPERG
1522 if (ni->ni_ies.ath_ie != NULL)
1523 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie);
1525 if (ni->ni_ies.htcap_ie != NULL)
1526 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie);
1527 if (ni->ni_ies.htinfo_ie != NULL)
1528 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie);
1530 if ((ni->ni_ies.htcap_ie != NULL) &&
1531 (ni->ni_ies.htinfo_ie != NULL) &&
1532 (ni->ni_vap->iv_flags_ht & IEEE80211_FHT_HT)) {
1537 /* NB: must be after ni_chan is setup */
1538 ieee80211_setup_rates(ni, sp->rates, sp->xrates,
1539 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE |
1540 IEEE80211_F_DONEGO | IEEE80211_F_DODEL);
1543 * If the neighbor is HT compatible, flip that on.
1546 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC,
1547 "%s: doing HT setup\n", __func__);
1548 ieee80211_ht_node_init(ni);
1549 ieee80211_ht_updateparams(ni,
1550 ni->ni_ies.htcap_ie,
1551 ni->ni_ies.htinfo_ie);
1552 ieee80211_setup_htrates(ni,
1553 ni->ni_ies.htcap_ie,
1554 IEEE80211_F_JOIN | IEEE80211_F_DOBRS);
1555 ieee80211_setup_basic_htrates(ni,
1556 ni->ni_ies.htinfo_ie);
1557 ieee80211_node_setuptxparms(ni);
1558 ieee80211_ratectl_node_init(ni);
1563 * Do node discovery in adhoc mode on receipt of a beacon
1564 * or probe response frame. Note that for the driver's
1565 * benefit we we treat this like an association so the
1566 * driver has an opportunity to setup it's private state.
1568 struct ieee80211_node *
1569 ieee80211_add_neighbor(struct ieee80211vap *vap,
1570 const struct ieee80211_frame *wh,
1571 const struct ieee80211_scanparams *sp)
1573 struct ieee80211_node *ni;
1575 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC,
1576 "%s: mac<%s>\n", __func__, ether_sprintf(wh->i_addr2));
1577 ni = ieee80211_dup_bss(vap, wh->i_addr2);/* XXX alloc_node? */
1579 struct ieee80211com *ic = vap->iv_ic;
1581 ieee80211_init_neighbor(ni, wh, sp);
1582 if (ieee80211_iserp_rateset(&ni->ni_rates))
1583 ni->ni_flags |= IEEE80211_NODE_ERP;
1584 ieee80211_node_setuptxparms(ni);
1585 ieee80211_ratectl_node_init(ni);
1586 if (ic->ic_newassoc != NULL)
1587 ic->ic_newassoc(ni, 1);
1588 /* XXX not right for 802.1x/WPA */
1589 ieee80211_node_authorize(ni);
1594 #define IS_PROBEREQ(wh) \
1595 ((wh->i_fc[0] & (IEEE80211_FC0_TYPE_MASK|IEEE80211_FC0_SUBTYPE_MASK)) \
1596 == (IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ))
1597 #define IS_BCAST_PROBEREQ(wh) \
1598 (IS_PROBEREQ(wh) && IEEE80211_IS_MULTICAST( \
1599 ((const struct ieee80211_frame *)(wh))->i_addr3))
1601 static __inline struct ieee80211_node *
1602 _find_rxnode(struct ieee80211_node_table *nt,
1603 const struct ieee80211_frame_min *wh)
1605 if (IS_BCAST_PROBEREQ(wh))
1606 return NULL; /* spam bcast probe req to all vap's */
1607 return ieee80211_find_node_locked(nt, wh->i_addr2);
1611 * Locate the node for sender, track state, and then pass the
1612 * (referenced) node up to the 802.11 layer for its use. Note
1613 * we can return NULL if the sender is not in the table.
1615 struct ieee80211_node *
1616 #ifdef IEEE80211_DEBUG_REFCNT
1617 ieee80211_find_rxnode_debug(struct ieee80211com *ic,
1618 const struct ieee80211_frame_min *wh, const char *func, int line)
1620 ieee80211_find_rxnode(struct ieee80211com *ic,
1621 const struct ieee80211_frame_min *wh)
1624 struct ieee80211_node_table *nt;
1625 struct ieee80211_node *ni;
1628 IEEE80211_NODE_LOCK(nt);
1629 ni = _find_rxnode(nt, wh);
1630 IEEE80211_NODE_UNLOCK(nt);
1636 * Like ieee80211_find_rxnode but use the supplied h/w
1637 * key index as a hint to locate the node in the key
1638 * mapping table. If an entry is present at the key
1639 * index we return it; otherwise do a normal lookup and
1640 * update the mapping table if the station has a unicast
1641 * key assigned to it.
1643 struct ieee80211_node *
1644 #ifdef IEEE80211_DEBUG_REFCNT
1645 ieee80211_find_rxnode_withkey_debug(struct ieee80211com *ic,
1646 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix,
1647 const char *func, int line)
1649 ieee80211_find_rxnode_withkey(struct ieee80211com *ic,
1650 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix)
1653 struct ieee80211_node_table *nt;
1654 struct ieee80211_node *ni;
1657 IEEE80211_NODE_LOCK(nt);
1658 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax)
1659 ni = nt->nt_keyixmap[keyix];
1663 ni = _find_rxnode(nt, wh);
1664 if (ni != NULL && nt->nt_keyixmap != NULL) {
1666 * If the station has a unicast key cache slot
1667 * assigned update the key->node mapping table.
1669 keyix = ni->ni_ucastkey.wk_rxkeyix;
1670 /* XXX can keyixmap[keyix] != NULL? */
1671 if (keyix < nt->nt_keyixmax &&
1672 nt->nt_keyixmap[keyix] == NULL) {
1673 IEEE80211_DPRINTF(ni->ni_vap,
1675 "%s: add key map entry %p<%s> refcnt %d\n",
1676 __func__, ni, ether_sprintf(ni->ni_macaddr),
1677 ieee80211_node_refcnt(ni)+1);
1678 nt->nt_keyixmap[keyix] = ieee80211_ref_node(ni);
1682 if (IS_BCAST_PROBEREQ(wh))
1683 ni = NULL; /* spam bcast probe req to all vap's */
1685 ieee80211_ref_node(ni);
1687 IEEE80211_NODE_UNLOCK(nt);
1691 #undef IS_BCAST_PROBEREQ
1695 * Return a reference to the appropriate node for sending
1696 * a data frame. This handles node discovery in adhoc networks.
1698 struct ieee80211_node *
1699 #ifdef IEEE80211_DEBUG_REFCNT
1700 ieee80211_find_txnode_debug(struct ieee80211vap *vap,
1701 const uint8_t macaddr[IEEE80211_ADDR_LEN],
1702 const char *func, int line)
1704 ieee80211_find_txnode(struct ieee80211vap *vap,
1705 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1708 struct ieee80211_node_table *nt = &vap->iv_ic->ic_sta;
1709 struct ieee80211_node *ni;
1712 * The destination address should be in the node table
1713 * unless this is a multicast/broadcast frame. We can
1714 * also optimize station mode operation, all frames go
1717 /* XXX can't hold lock across dup_bss 'cuz of recursive locking */
1718 IEEE80211_NODE_LOCK(nt);
1719 if (vap->iv_opmode == IEEE80211_M_STA ||
1720 vap->iv_opmode == IEEE80211_M_WDS ||
1721 IEEE80211_IS_MULTICAST(macaddr))
1722 ni = ieee80211_ref_node(vap->iv_bss);
1724 ni = ieee80211_find_node_locked(nt, macaddr);
1725 IEEE80211_NODE_UNLOCK(nt);
1728 if (vap->iv_opmode == IEEE80211_M_IBSS ||
1729 vap->iv_opmode == IEEE80211_M_AHDEMO) {
1731 * In adhoc mode cons up a node for the destination.
1732 * Note that we need an additional reference for the
1733 * caller to be consistent with
1734 * ieee80211_find_node_locked.
1736 ni = ieee80211_fakeup_adhoc_node(vap, macaddr);
1738 (void) ieee80211_ref_node(ni);
1740 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, macaddr,
1741 "no node, discard frame (%s)", __func__);
1742 vap->iv_stats.is_tx_nonode++;
1749 _ieee80211_free_node(struct ieee80211_node *ni)
1751 struct ieee80211_node_table *nt = ni->ni_table;
1754 * NB: careful about referencing the vap as it may be
1755 * gone if the last reference was held by a driver.
1756 * We know the com will always be present so it's safe
1757 * to use ni_ic below to reclaim resources.
1760 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1761 "%s %p<%s> in %s table\n", __func__, ni,
1762 ether_sprintf(ni->ni_macaddr),
1763 nt != NULL ? nt->nt_name : "<gone>");
1765 if (ni->ni_associd != 0) {
1766 struct ieee80211vap *vap = ni->ni_vap;
1767 if (vap->iv_aid_bitmap != NULL)
1768 IEEE80211_AID_CLR(vap, ni->ni_associd);
1771 TAILQ_REMOVE(&nt->nt_node, ni, ni_list);
1772 LIST_REMOVE(ni, ni_hash);
1774 ni->ni_ic->ic_node_free(ni);
1778 * Clear any entry in the unicast key mapping table.
1781 node_clear_keyixmap(struct ieee80211_node_table *nt, struct ieee80211_node *ni)
1783 ieee80211_keyix keyix;
1785 keyix = ni->ni_ucastkey.wk_rxkeyix;
1786 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax &&
1787 nt->nt_keyixmap[keyix] == ni) {
1788 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1789 "%s: %p<%s> clear key map entry %u\n",
1790 __func__, ni, ether_sprintf(ni->ni_macaddr), keyix);
1791 nt->nt_keyixmap[keyix] = NULL;
1792 ieee80211_node_decref(ni);
1800 #ifdef IEEE80211_DEBUG_REFCNT
1801 ieee80211_free_node_debug(struct ieee80211_node *ni, const char *func, int line)
1803 ieee80211_free_node(struct ieee80211_node *ni)
1806 struct ieee80211_node_table *nt = ni->ni_table;
1808 #ifdef IEEE80211_DEBUG_REFCNT
1809 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1810 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni,
1811 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1);
1814 IEEE80211_NODE_LOCK(nt);
1815 if (ieee80211_node_dectestref(ni)) {
1817 * Last reference, reclaim state.
1819 _ieee80211_free_node(ni);
1820 } else if (ieee80211_node_refcnt(ni) == 1)
1821 if (node_clear_keyixmap(nt, ni))
1822 _ieee80211_free_node(ni);
1823 IEEE80211_NODE_UNLOCK(nt);
1825 if (ieee80211_node_dectestref(ni))
1826 _ieee80211_free_node(ni);
1831 * Reclaim a unicast key and clear any key cache state.
1834 ieee80211_node_delucastkey(struct ieee80211_node *ni)
1836 struct ieee80211com *ic = ni->ni_ic;
1837 struct ieee80211_node_table *nt = &ic->ic_sta;
1838 struct ieee80211_node *nikey;
1839 ieee80211_keyix keyix;
1840 int isowned, status;
1843 * NB: We must beware of LOR here; deleting the key
1844 * can cause the crypto layer to block traffic updates
1845 * which can generate a LOR against the node table lock;
1846 * grab it here and stash the key index for our use below.
1848 * Must also beware of recursion on the node table lock.
1849 * When called from node_cleanup we may already have
1850 * the node table lock held. Unfortunately there's no
1851 * way to separate out this path so we must do this
1854 isowned = IEEE80211_NODE_IS_LOCKED(nt);
1856 IEEE80211_NODE_LOCK(nt);
1858 status = 1; /* NB: success */
1859 if (ni->ni_ucastkey.wk_keyix != IEEE80211_KEYIX_NONE) {
1860 keyix = ni->ni_ucastkey.wk_rxkeyix;
1861 status = ieee80211_crypto_delkey(ni->ni_vap, &ni->ni_ucastkey);
1862 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) {
1863 nikey = nt->nt_keyixmap[keyix];
1864 nt->nt_keyixmap[keyix] = NULL;
1868 IEEE80211_NODE_UNLOCK(nt);
1870 if (nikey != NULL) {
1871 KASSERT(nikey == ni,
1872 ("key map out of sync, ni %p nikey %p", ni, nikey));
1873 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1874 "%s: delete key map entry %p<%s> refcnt %d\n",
1875 __func__, ni, ether_sprintf(ni->ni_macaddr),
1876 ieee80211_node_refcnt(ni)-1);
1877 ieee80211_free_node(ni);
1883 * Reclaim a node. If this is the last reference count then
1884 * do the normal free work. Otherwise remove it from the node
1885 * table and mark it gone by clearing the back-reference.
1888 node_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni)
1891 IEEE80211_NODE_LOCK_ASSERT(nt);
1893 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1894 "%s: remove %p<%s> from %s table, refcnt %d\n",
1895 __func__, ni, ether_sprintf(ni->ni_macaddr),
1896 nt->nt_name, ieee80211_node_refcnt(ni)-1);
1898 * Clear any entry in the unicast key mapping table.
1899 * We need to do it here so rx lookups don't find it
1900 * in the mapping table even if it's not in the hash
1901 * table. We cannot depend on the mapping table entry
1902 * being cleared because the node may not be free'd.
1904 (void)node_clear_keyixmap(nt, ni);
1905 if (!ieee80211_node_dectestref(ni)) {
1907 * Other references are present, just remove the
1908 * node from the table so it cannot be found. When
1909 * the references are dropped storage will be
1912 TAILQ_REMOVE(&nt->nt_node, ni, ni_list);
1913 LIST_REMOVE(ni, ni_hash);
1914 ni->ni_table = NULL; /* clear reference */
1916 _ieee80211_free_node(ni);
1920 * Node table support.
1924 ieee80211_node_table_init(struct ieee80211com *ic,
1925 struct ieee80211_node_table *nt,
1926 const char *name, int inact, int keyixmax)
1930 IEEE80211_NODE_LOCK_INIT(nt, ic->ic_name);
1931 IEEE80211_NODE_ITERATE_LOCK_INIT(nt, ic->ic_name);
1932 TAILQ_INIT(&nt->nt_node);
1935 nt->nt_inact_init = inact;
1936 nt->nt_keyixmax = keyixmax;
1937 if (nt->nt_keyixmax > 0) {
1938 nt->nt_keyixmap = (struct ieee80211_node **) IEEE80211_MALLOC(
1939 keyixmax * sizeof(struct ieee80211_node *),
1941 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
1942 if (nt->nt_keyixmap == NULL)
1944 "Cannot allocate key index map with %u entries\n",
1947 nt->nt_keyixmap = NULL;
1951 ieee80211_node_table_reset(struct ieee80211_node_table *nt,
1952 struct ieee80211vap *match)
1954 struct ieee80211_node *ni, *next;
1956 IEEE80211_NODE_LOCK(nt);
1957 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) {
1958 if (match != NULL && ni->ni_vap != match)
1960 /* XXX can this happen? if so need's work */
1961 if (ni->ni_associd != 0) {
1962 struct ieee80211vap *vap = ni->ni_vap;
1964 if (vap->iv_auth->ia_node_leave != NULL)
1965 vap->iv_auth->ia_node_leave(ni);
1966 if (vap->iv_aid_bitmap != NULL)
1967 IEEE80211_AID_CLR(vap, ni->ni_associd);
1969 ni->ni_wdsvap = NULL; /* clear reference */
1970 node_reclaim(nt, ni);
1972 if (match != NULL && match->iv_opmode == IEEE80211_M_WDS) {
1974 * Make a separate pass to clear references to this vap
1975 * held by DWDS entries. They will not be matched above
1976 * because ni_vap will point to the ap vap but we still
1977 * need to clear ni_wdsvap when the WDS vap is destroyed
1980 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next)
1981 if (ni->ni_wdsvap == match)
1982 ni->ni_wdsvap = NULL;
1984 IEEE80211_NODE_UNLOCK(nt);
1988 ieee80211_node_table_cleanup(struct ieee80211_node_table *nt)
1990 ieee80211_node_table_reset(nt, NULL);
1991 if (nt->nt_keyixmap != NULL) {
1993 /* XXX verify all entries are NULL */
1995 for (i = 0; i < nt->nt_keyixmax; i++)
1996 if (nt->nt_keyixmap[i] != NULL)
1997 printf("%s: %s[%u] still active\n", __func__,
2000 IEEE80211_FREE(nt->nt_keyixmap, M_80211_NODE);
2001 nt->nt_keyixmap = NULL;
2003 IEEE80211_NODE_ITERATE_LOCK_DESTROY(nt);
2004 IEEE80211_NODE_LOCK_DESTROY(nt);
2008 * Timeout inactive stations and do related housekeeping.
2009 * Note that we cannot hold the node lock while sending a
2010 * frame as this would lead to a LOR. Instead we use a
2011 * generation number to mark nodes that we've scanned and
2012 * drop the lock and restart a scan if we have to time out
2013 * a node. Since we are single-threaded by virtue of
2014 * controlling the inactivity timer we can be sure this will
2015 * process each node only once.
2018 ieee80211_timeout_stations(struct ieee80211com *ic)
2020 struct ieee80211_node_table *nt = &ic->ic_sta;
2021 struct ieee80211vap *vap;
2022 struct ieee80211_node *ni;
2025 IEEE80211_NODE_ITERATE_LOCK(nt);
2026 gen = ++nt->nt_scangen;
2028 IEEE80211_NODE_LOCK(nt);
2029 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) {
2030 if (ni->ni_scangen == gen) /* previously handled */
2032 ni->ni_scangen = gen;
2034 * Ignore entries for which have yet to receive an
2035 * authentication frame. These are transient and
2036 * will be reclaimed when the last reference to them
2037 * goes away (when frame xmits complete).
2041 * Only process stations when in RUN state. This
2042 * insures, for example, that we don't timeout an
2043 * inactive station during CAC. Note that CSA state
2044 * is actually handled in ieee80211_node_timeout as
2045 * it applies to more than timeout processing.
2047 if (vap->iv_state != IEEE80211_S_RUN)
2049 /* XXX can vap be NULL? */
2050 if ((vap->iv_opmode == IEEE80211_M_HOSTAP ||
2051 vap->iv_opmode == IEEE80211_M_STA) &&
2052 (ni->ni_flags & IEEE80211_NODE_AREF) == 0)
2055 * Free fragment if not needed anymore
2056 * (last fragment older than 1s).
2057 * XXX doesn't belong here, move to node_age
2059 if (ni->ni_rxfrag[0] != NULL &&
2060 ticks > ni->ni_rxfragstamp + hz) {
2061 m_freem(ni->ni_rxfrag[0]);
2062 ni->ni_rxfrag[0] = NULL;
2064 if (ni->ni_inact > 0) {
2066 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni,
2067 "%s: inact %u inact_reload %u nrates %u",
2068 __func__, ni->ni_inact, ni->ni_inact_reload,
2069 ni->ni_rates.rs_nrates);
2072 * Special case ourself; we may be idle for extended periods
2073 * of time and regardless reclaiming our state is wrong.
2074 * XXX run ic_node_age
2076 if (ni == vap->iv_bss)
2078 if (ni->ni_associd != 0 ||
2079 (vap->iv_opmode == IEEE80211_M_IBSS ||
2080 vap->iv_opmode == IEEE80211_M_AHDEMO)) {
2082 * Age/drain resources held by the station.
2084 ic->ic_node_age(ni);
2086 * Probe the station before time it out. We
2087 * send a null data frame which may not be
2088 * universally supported by drivers (need it
2089 * for ps-poll support so it should be...).
2091 * XXX don't probe the station unless we've
2092 * received a frame from them (and have
2093 * some idea of the rates they are capable
2094 * of); this will get fixed more properly
2095 * soon with better handling of the rate set.
2097 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) &&
2098 (0 < ni->ni_inact &&
2099 ni->ni_inact <= vap->iv_inact_probe) &&
2100 ni->ni_rates.rs_nrates != 0) {
2102 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE,
2104 "probe station due to inactivity");
2106 * Grab a reference before unlocking the table
2107 * so the node cannot be reclaimed before we
2108 * send the frame. ieee80211_send_nulldata
2109 * understands we've done this and reclaims the
2110 * ref for us as needed.
2112 ieee80211_ref_node(ni);
2113 IEEE80211_NODE_UNLOCK(nt);
2114 ieee80211_send_nulldata(ni);
2119 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) &&
2120 ni->ni_inact <= 0) {
2122 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, ni,
2123 "station timed out due to inactivity "
2124 "(refcnt %u)", ieee80211_node_refcnt(ni));
2126 * Send a deauthenticate frame and drop the station.
2127 * This is somewhat complicated due to reference counts
2128 * and locking. At this point a station will typically
2129 * have a reference count of 1. ieee80211_node_leave
2130 * will do a "free" of the node which will drop the
2131 * reference count. But in the meantime a reference
2132 * wil be held by the deauth frame. The actual reclaim
2133 * of the node will happen either after the tx is
2134 * completed or by ieee80211_node_leave.
2136 * Separately we must drop the node lock before sending
2137 * in case the driver takes a lock, as this can result
2138 * in a LOR between the node lock and the driver lock.
2140 ieee80211_ref_node(ni);
2141 IEEE80211_NODE_UNLOCK(nt);
2142 if (ni->ni_associd != 0) {
2143 IEEE80211_SEND_MGMT(ni,
2144 IEEE80211_FC0_SUBTYPE_DEAUTH,
2145 IEEE80211_REASON_AUTH_EXPIRE);
2147 ieee80211_node_leave(ni);
2148 ieee80211_free_node(ni);
2149 vap->iv_stats.is_node_timeout++;
2153 IEEE80211_NODE_UNLOCK(nt);
2155 IEEE80211_NODE_ITERATE_UNLOCK(nt);
2159 * Aggressively reclaim resources. This should be used
2160 * only in a critical situation to reclaim mbuf resources.
2163 ieee80211_drain(struct ieee80211com *ic)
2165 struct ieee80211_node_table *nt = &ic->ic_sta;
2166 struct ieee80211vap *vap;
2167 struct ieee80211_node *ni;
2169 IEEE80211_NODE_LOCK(nt);
2170 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) {
2172 * Ignore entries for which have yet to receive an
2173 * authentication frame. These are transient and
2174 * will be reclaimed when the last reference to them
2175 * goes away (when frame xmits complete).
2179 * Only process stations when in RUN state. This
2180 * insures, for example, that we don't timeout an
2181 * inactive station during CAC. Note that CSA state
2182 * is actually handled in ieee80211_node_timeout as
2183 * it applies to more than timeout processing.
2185 if (vap->iv_state != IEEE80211_S_RUN)
2187 /* XXX can vap be NULL? */
2188 if ((vap->iv_opmode == IEEE80211_M_HOSTAP ||
2189 vap->iv_opmode == IEEE80211_M_STA) &&
2190 (ni->ni_flags & IEEE80211_NODE_AREF) == 0)
2194 * XXX doesn't belong here, move to node_drain
2196 if (ni->ni_rxfrag[0] != NULL) {
2197 m_freem(ni->ni_rxfrag[0]);
2198 ni->ni_rxfrag[0] = NULL;
2201 * Drain resources held by the station.
2203 ic->ic_node_drain(ni);
2205 IEEE80211_NODE_UNLOCK(nt);
2209 * Per-ieee80211com inactivity timer callback.
2212 ieee80211_node_timeout(void *arg)
2214 struct ieee80211com *ic = arg;
2217 * Defer timeout processing if a channel switch is pending.
2218 * We typically need to be mute so not doing things that
2219 * might generate frames is good to handle in one place.
2220 * Suppressing the station timeout processing may extend the
2221 * lifetime of inactive stations (by not decrementing their
2222 * idle counters) but this should be ok unless the CSA is
2223 * active for an unusually long time.
2225 if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) {
2226 ieee80211_scan_timeout(ic);
2227 ieee80211_timeout_stations(ic);
2228 ieee80211_ageq_age(&ic->ic_stageq, IEEE80211_INACT_WAIT);
2231 ieee80211_erp_timeout(ic);
2232 ieee80211_ht_timeout(ic);
2233 IEEE80211_UNLOCK(ic);
2235 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz,
2236 ieee80211_node_timeout, ic);
2240 * Iterate over the node table and return an array of ref'ed nodes.
2242 * This is separated out from calling the actual node function so that
2243 * no LORs will occur.
2245 * If there are too many nodes (ie, the number of nodes doesn't fit
2246 * within 'max_aid' entries) then the node references will be freed
2247 * and an error will be returned.
2249 * The responsibility of allocating and freeing "ni_arr" is up to
2253 ieee80211_iterate_nt(struct ieee80211_node_table *nt,
2254 struct ieee80211_node **ni_arr, uint16_t max_aid)
2258 struct ieee80211_node *ni;
2260 IEEE80211_NODE_ITERATE_LOCK(nt);
2261 IEEE80211_NODE_LOCK(nt);
2263 gen = ++nt->nt_scangen;
2267 * We simply assume here that since the node
2268 * scan generation doesn't change (as
2269 * we are holding both the node table and
2270 * node table iteration locks), we can simply
2271 * assign it to the node here.
2273 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) {
2276 ic_printf(nt->nt_ic, "Node array overflow: max=%u",
2280 ni_arr[i] = ieee80211_ref_node(ni);
2281 ni_arr[i]->ni_scangen = gen;
2286 * It's safe to unlock here.
2288 * If we're successful, the list is returned.
2289 * If we're unsuccessful, the list is ignored
2290 * and we remove our references.
2292 * This avoids any potential LOR with
2293 * ieee80211_free_node().
2295 IEEE80211_NODE_UNLOCK(nt);
2296 IEEE80211_NODE_ITERATE_UNLOCK(nt);
2299 * If ret is non-zero, we hit some kind of error.
2300 * Rather than walking some nodes, we'll walk none
2304 for (j = 0; j < i; j++) {
2305 /* ieee80211_free_node() locks by itself */
2306 ieee80211_free_node(ni_arr[j]);
2314 * Just a wrapper, so we don't have to change every ieee80211_iterate_nodes()
2315 * reference in the source.
2317 * Note that this fetches 'max_aid' from the first VAP, rather than finding
2318 * the largest max_aid from all VAPs.
2321 ieee80211_iterate_nodes(struct ieee80211_node_table *nt,
2322 ieee80211_iter_func *f, void *arg)
2324 struct ieee80211_node **ni_arr;
2328 struct ieee80211vap *vap;
2330 /* Overdoing it default */
2331 max_aid = IEEE80211_AID_MAX;
2333 /* Handle the case of there being no vaps just yet */
2334 vap = TAILQ_FIRST(&nt->nt_ic->ic_vaps);
2336 max_aid = vap->iv_max_aid;
2338 size = max_aid * sizeof(struct ieee80211_node *);
2339 ni_arr = (struct ieee80211_node **) IEEE80211_MALLOC(size, M_80211_NODE,
2340 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
2345 * If this fails, the node table won't have any
2346 * valid entries - ieee80211_iterate_nt() frees
2347 * the references to them. So don't try walking
2348 * the table; just skip to the end and free the
2351 if (ieee80211_iterate_nt(nt, ni_arr, max_aid) != 0)
2354 for (i = 0; i < max_aid; i++) {
2355 if (ni_arr[i] == NULL) /* end of the list */
2357 (*f)(arg, ni_arr[i]);
2358 /* ieee80211_free_node() locks by itself */
2359 ieee80211_free_node(ni_arr[i]);
2363 IEEE80211_FREE(ni_arr, M_80211_NODE);
2367 ieee80211_dump_node(struct ieee80211_node_table *nt, struct ieee80211_node *ni)
2369 printf("0x%p: mac %s refcnt %d\n", ni,
2370 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni));
2371 printf("\tscangen %u authmode %u flags 0x%x\n",
2372 ni->ni_scangen, ni->ni_authmode, ni->ni_flags);
2373 printf("\tassocid 0x%x txpower %u vlan %u\n",
2374 ni->ni_associd, ni->ni_txpower, ni->ni_vlan);
2375 printf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n",
2376 ni->ni_txseqs[IEEE80211_NONQOS_TID],
2377 ni->ni_rxseqs[IEEE80211_NONQOS_TID] >> IEEE80211_SEQ_SEQ_SHIFT,
2378 ni->ni_rxseqs[IEEE80211_NONQOS_TID] & IEEE80211_SEQ_FRAG_MASK,
2379 ni->ni_rxfragstamp);
2380 printf("\trssi %d noise %d intval %u capinfo 0x%x\n",
2381 node_getrssi(ni), ni->ni_noise,
2382 ni->ni_intval, ni->ni_capinfo);
2383 printf("\tbssid %s essid \"%.*s\" channel %u:0x%x\n",
2384 ether_sprintf(ni->ni_bssid),
2385 ni->ni_esslen, ni->ni_essid,
2386 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags);
2387 printf("\tinact %u inact_reload %u txrate %u\n",
2388 ni->ni_inact, ni->ni_inact_reload, ni->ni_txrate);
2389 printf("\thtcap %x htparam %x htctlchan %u ht2ndchan %u\n",
2390 ni->ni_htcap, ni->ni_htparam,
2391 ni->ni_htctlchan, ni->ni_ht2ndchan);
2392 printf("\thtopmode %x htstbc %x chw %u\n",
2393 ni->ni_htopmode, ni->ni_htstbc, ni->ni_chw);
2397 ieee80211_dump_nodes(struct ieee80211_node_table *nt)
2399 ieee80211_iterate_nodes(nt,
2400 (ieee80211_iter_func *) ieee80211_dump_node, nt);
2404 ieee80211_notify_erp_locked(struct ieee80211com *ic)
2406 struct ieee80211vap *vap;
2408 IEEE80211_LOCK_ASSERT(ic);
2410 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
2411 if (vap->iv_opmode == IEEE80211_M_HOSTAP)
2412 ieee80211_beacon_notify(vap, IEEE80211_BEACON_ERP);
2416 ieee80211_notify_erp(struct ieee80211com *ic)
2419 ieee80211_notify_erp_locked(ic);
2420 IEEE80211_UNLOCK(ic);
2424 * Handle a station joining an 11g network.
2427 ieee80211_node_join_11g(struct ieee80211_node *ni)
2429 struct ieee80211com *ic = ni->ni_ic;
2431 IEEE80211_LOCK_ASSERT(ic);
2434 * Station isn't capable of short slot time. Bump
2435 * the count of long slot time stations and disable
2436 * use of short slot time. Note that the actual switch
2437 * over to long slot time use may not occur until the
2438 * next beacon transmission (per sec. 7.3.1.4 of 11g).
2440 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) {
2441 ic->ic_longslotsta++;
2442 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2443 "station needs long slot time, count %d",
2444 ic->ic_longslotsta);
2445 /* XXX vap's w/ conflicting needs won't work */
2446 if (!IEEE80211_IS_CHAN_108G(ic->ic_bsschan)) {
2448 * Don't force slot time when switched to turbo
2449 * mode as non-ERP stations won't be present; this
2450 * need only be done when on the normal G channel.
2452 ieee80211_set_shortslottime(ic, 0);
2456 * If the new station is not an ERP station
2457 * then bump the counter and enable protection
2460 if (!ieee80211_iserp_rateset(&ni->ni_rates)) {
2462 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2463 "station is !ERP, %d non-ERP stations associated",
2466 * If station does not support short preamble
2467 * then we must enable use of Barker preamble.
2469 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) {
2470 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2471 "%s", "station needs long preamble");
2472 ic->ic_flags |= IEEE80211_F_USEBARKER;
2473 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE;
2476 * If protection is configured and this is the first
2477 * indication we should use protection, enable it.
2479 if (ic->ic_protmode != IEEE80211_PROT_NONE &&
2480 ic->ic_nonerpsta == 1 &&
2481 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) {
2482 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC,
2483 "%s: enable use of protection\n", __func__);
2484 ic->ic_flags |= IEEE80211_F_USEPROT;
2485 ieee80211_notify_erp_locked(ic);
2488 ni->ni_flags |= IEEE80211_NODE_ERP;
2492 ieee80211_node_join(struct ieee80211_node *ni, int resp)
2494 struct ieee80211com *ic = ni->ni_ic;
2495 struct ieee80211vap *vap = ni->ni_vap;
2498 if (ni->ni_associd == 0) {
2501 KASSERT(vap->iv_aid_bitmap != NULL, ("no aid bitmap"));
2503 * It would be good to search the bitmap
2504 * more efficiently, but this will do for now.
2506 for (aid = 1; aid < vap->iv_max_aid; aid++) {
2507 if (!IEEE80211_AID_ISSET(vap, aid))
2510 if (aid >= vap->iv_max_aid) {
2511 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_TOOMANY);
2512 ieee80211_node_leave(ni);
2515 ni->ni_associd = aid | 0xc000;
2516 ni->ni_jointime = time_uptime;
2518 IEEE80211_AID_SET(vap, ni->ni_associd);
2519 vap->iv_sta_assoc++;
2522 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan))
2523 ieee80211_ht_node_join(ni);
2524 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) &&
2525 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan))
2526 ieee80211_node_join_11g(ni);
2527 IEEE80211_UNLOCK(ic);
2533 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni,
2534 "station associated at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s",
2535 IEEE80211_NODE_AID(ni),
2536 ic->ic_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long",
2537 ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long",
2538 ic->ic_flags & IEEE80211_F_USEPROT ? ", protection" : "",
2539 ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "",
2540 ni->ni_flags & IEEE80211_NODE_HT ?
2541 (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "",
2542 ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "",
2543 ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" :
2544 ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "",
2545 ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "",
2546 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ?
2547 ", fast-frames" : "",
2548 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ?
2552 ieee80211_node_setuptxparms(ni);
2553 ieee80211_ratectl_node_init(ni);
2554 /* give driver a chance to setup state like ni_txrate */
2555 if (ic->ic_newassoc != NULL)
2556 ic->ic_newassoc(ni, newassoc);
2557 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_SUCCESS);
2558 /* tell the authenticator about new station */
2559 if (vap->iv_auth->ia_node_join != NULL)
2560 vap->iv_auth->ia_node_join(ni);
2561 ieee80211_notify_node_join(ni,
2562 resp == IEEE80211_FC0_SUBTYPE_ASSOC_RESP);
2566 disable_protection(struct ieee80211com *ic)
2568 KASSERT(ic->ic_nonerpsta == 0 &&
2569 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0,
2570 ("%d non ERP stations, flags 0x%x", ic->ic_nonerpsta,
2573 ic->ic_flags &= ~IEEE80211_F_USEPROT;
2574 /* XXX verify mode? */
2575 if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) {
2576 ic->ic_flags |= IEEE80211_F_SHPREAMBLE;
2577 ic->ic_flags &= ~IEEE80211_F_USEBARKER;
2579 ieee80211_notify_erp_locked(ic);
2583 * Handle a station leaving an 11g network.
2586 ieee80211_node_leave_11g(struct ieee80211_node *ni)
2588 struct ieee80211com *ic = ni->ni_ic;
2590 IEEE80211_LOCK_ASSERT(ic);
2592 KASSERT(IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan),
2593 ("not in 11g, bss %u:0x%x", ic->ic_bsschan->ic_freq,
2594 ic->ic_bsschan->ic_flags));
2597 * If a long slot station do the slot time bookkeeping.
2599 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) {
2600 KASSERT(ic->ic_longslotsta > 0,
2601 ("bogus long slot station count %d", ic->ic_longslotsta));
2602 ic->ic_longslotsta--;
2603 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2604 "long slot time station leaves, count now %d",
2605 ic->ic_longslotsta);
2606 if (ic->ic_longslotsta == 0) {
2608 * Re-enable use of short slot time if supported
2609 * and not operating in IBSS mode (per spec).
2611 if ((ic->ic_caps & IEEE80211_C_SHSLOT) &&
2612 ic->ic_opmode != IEEE80211_M_IBSS) {
2613 IEEE80211_DPRINTF(ni->ni_vap,
2614 IEEE80211_MSG_ASSOC,
2615 "%s: re-enable use of short slot time\n",
2617 ieee80211_set_shortslottime(ic, 1);
2622 * If a non-ERP station do the protection-related bookkeeping.
2624 if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) {
2625 KASSERT(ic->ic_nonerpsta > 0,
2626 ("bogus non-ERP station count %d", ic->ic_nonerpsta));
2628 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2629 "non-ERP station leaves, count now %d%s", ic->ic_nonerpsta,
2630 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) ?
2631 " (non-ERP sta present)" : "");
2632 if (ic->ic_nonerpsta == 0 &&
2633 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) {
2634 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC,
2635 "%s: disable use of protection\n", __func__);
2636 disable_protection(ic);
2642 * Time out presence of an overlapping bss with non-ERP
2643 * stations. When operating in hostap mode we listen for
2644 * beacons from other stations and if we identify a non-ERP
2645 * station is present we enable protection. To identify
2646 * when all non-ERP stations are gone we time out this
2650 ieee80211_erp_timeout(struct ieee80211com *ic)
2653 IEEE80211_LOCK_ASSERT(ic);
2655 if ((ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) &&
2656 ieee80211_time_after(ticks, ic->ic_lastnonerp + IEEE80211_NONERP_PRESENT_AGE)) {
2658 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni,
2659 "%s", "age out non-ERP sta present on channel");
2661 ic->ic_flags_ext &= ~IEEE80211_FEXT_NONERP_PR;
2662 if (ic->ic_nonerpsta == 0)
2663 disable_protection(ic);
2668 * Handle bookkeeping for station deauthentication/disassociation
2669 * when operating as an ap.
2672 ieee80211_node_leave(struct ieee80211_node *ni)
2674 struct ieee80211com *ic = ni->ni_ic;
2675 struct ieee80211vap *vap = ni->ni_vap;
2676 struct ieee80211_node_table *nt = ni->ni_table;
2678 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni,
2679 "station with aid %d leaves", IEEE80211_NODE_AID(ni));
2681 KASSERT(vap->iv_opmode != IEEE80211_M_STA,
2682 ("unexpected operating mode %u", vap->iv_opmode));
2684 * If node wasn't previously associated all
2685 * we need to do is reclaim the reference.
2687 /* XXX ibss mode bypasses 11g and notification */
2688 if (ni->ni_associd == 0)
2691 * Tell the authenticator the station is leaving.
2692 * Note that we must do this before yanking the
2693 * association id as the authenticator uses the
2694 * associd to locate it's state block.
2696 if (vap->iv_auth->ia_node_leave != NULL)
2697 vap->iv_auth->ia_node_leave(ni);
2700 IEEE80211_AID_CLR(vap, ni->ni_associd);
2701 vap->iv_sta_assoc--;
2704 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan))
2705 ieee80211_ht_node_leave(ni);
2706 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) &&
2707 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan))
2708 ieee80211_node_leave_11g(ni);
2709 IEEE80211_UNLOCK(ic);
2711 * Cleanup station state. In particular clear various
2712 * state that might otherwise be reused if the node
2713 * is reused before the reference count goes to zero
2714 * (and memory is reclaimed).
2716 ieee80211_sta_leave(ni);
2719 * Remove the node from any table it's recorded in and
2720 * drop the caller's reference. Removal from the table
2721 * is important to insure the node is not reprocessed
2725 IEEE80211_NODE_LOCK(nt);
2726 node_reclaim(nt, ni);
2727 IEEE80211_NODE_UNLOCK(nt);
2729 ieee80211_free_node(ni);
2733 struct ieee80211vap *vap;
2735 uint32_t rssi_total;
2739 get_hostap_rssi(void *arg, struct ieee80211_node *ni)
2741 struct rssiinfo *info = arg;
2742 struct ieee80211vap *vap = ni->ni_vap;
2745 if (info->vap != vap)
2747 /* only associated stations */
2748 if (ni->ni_associd == 0)
2750 rssi = vap->iv_ic->ic_node_getrssi(ni);
2752 info->rssi_samples++;
2753 info->rssi_total += rssi;
2758 get_adhoc_rssi(void *arg, struct ieee80211_node *ni)
2760 struct rssiinfo *info = arg;
2761 struct ieee80211vap *vap = ni->ni_vap;
2764 if (info->vap != vap)
2766 /* only neighbors */
2767 /* XXX check bssid */
2768 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0)
2770 rssi = vap->iv_ic->ic_node_getrssi(ni);
2772 info->rssi_samples++;
2773 info->rssi_total += rssi;
2777 #ifdef IEEE80211_SUPPORT_MESH
2779 get_mesh_rssi(void *arg, struct ieee80211_node *ni)
2781 struct rssiinfo *info = arg;
2782 struct ieee80211vap *vap = ni->ni_vap;
2785 if (info->vap != vap)
2787 /* only neighbors that peered successfully */
2788 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED)
2790 rssi = vap->iv_ic->ic_node_getrssi(ni);
2792 info->rssi_samples++;
2793 info->rssi_total += rssi;
2796 #endif /* IEEE80211_SUPPORT_MESH */
2799 ieee80211_getrssi(struct ieee80211vap *vap)
2801 #define NZ(x) ((x) == 0 ? 1 : (x))
2802 struct ieee80211com *ic = vap->iv_ic;
2803 struct rssiinfo info;
2805 info.rssi_total = 0;
2806 info.rssi_samples = 0;
2808 switch (vap->iv_opmode) {
2809 case IEEE80211_M_IBSS: /* average of all ibss neighbors */
2810 case IEEE80211_M_AHDEMO: /* average of all neighbors */
2811 ieee80211_iterate_nodes(&ic->ic_sta, get_adhoc_rssi, &info);
2813 case IEEE80211_M_HOSTAP: /* average of all associated stations */
2814 ieee80211_iterate_nodes(&ic->ic_sta, get_hostap_rssi, &info);
2816 #ifdef IEEE80211_SUPPORT_MESH
2817 case IEEE80211_M_MBSS: /* average of all mesh neighbors */
2818 ieee80211_iterate_nodes(&ic->ic_sta, get_mesh_rssi, &info);
2821 case IEEE80211_M_MONITOR: /* XXX */
2822 case IEEE80211_M_STA: /* use stats from associated ap */
2824 if (vap->iv_bss != NULL)
2825 info.rssi_total = ic->ic_node_getrssi(vap->iv_bss);
2826 info.rssi_samples = 1;
2829 return info.rssi_total / NZ(info.rssi_samples);
2834 ieee80211_getsignal(struct ieee80211vap *vap, int8_t *rssi, int8_t *noise)
2837 if (vap->iv_bss == NULL) /* NB: shouldn't happen */
2839 vap->iv_ic->ic_node_getsignal(vap->iv_bss, rssi, noise);
2840 /* for non-station mode return avg'd rssi accounting */
2841 if (vap->iv_opmode != IEEE80211_M_STA)
2842 *rssi = ieee80211_getrssi(vap);