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_media.h>
42 #include <net/ethernet.h>
44 #include <net80211/ieee80211_var.h>
45 #include <net80211/ieee80211_input.h>
46 #ifdef IEEE80211_SUPPORT_SUPERG
47 #include <net80211/ieee80211_superg.h>
49 #ifdef IEEE80211_SUPPORT_TDMA
50 #include <net80211/ieee80211_tdma.h>
52 #include <net80211/ieee80211_wds.h>
53 #include <net80211/ieee80211_mesh.h>
54 #include <net80211/ieee80211_ratectl.h>
59 * IEEE80211_NODE_HASHSIZE must be a power of 2.
61 CTASSERT((IEEE80211_NODE_HASHSIZE & (IEEE80211_NODE_HASHSIZE-1)) == 0);
64 * Association id's are managed with a bit vector.
66 #define IEEE80211_AID_SET(_vap, b) \
67 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] |= \
68 (1 << (IEEE80211_AID(b) % 32)))
69 #define IEEE80211_AID_CLR(_vap, b) \
70 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] &= \
71 ~(1 << (IEEE80211_AID(b) % 32)))
72 #define IEEE80211_AID_ISSET(_vap, b) \
73 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] & (1 << (IEEE80211_AID(b) % 32)))
75 #ifdef IEEE80211_DEBUG_REFCNT
76 #define REFCNT_LOC "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line
78 #define REFCNT_LOC "%s %p<%s> refcnt %d\n", __func__
81 static int ieee80211_sta_join1(struct ieee80211_node *);
83 static struct ieee80211_node *node_alloc(struct ieee80211vap *,
84 const uint8_t [IEEE80211_ADDR_LEN]);
85 static void node_cleanup(struct ieee80211_node *);
86 static void node_free(struct ieee80211_node *);
87 static void node_age(struct ieee80211_node *);
88 static int8_t node_getrssi(const struct ieee80211_node *);
89 static void node_getsignal(const struct ieee80211_node *, int8_t *, int8_t *);
90 static void node_getmimoinfo(const struct ieee80211_node *,
91 struct ieee80211_mimo_info *);
93 static void _ieee80211_free_node(struct ieee80211_node *);
95 static void ieee80211_node_table_init(struct ieee80211com *ic,
96 struct ieee80211_node_table *nt, const char *name,
97 int inact, int keymaxix);
98 static void ieee80211_node_table_reset(struct ieee80211_node_table *,
99 struct ieee80211vap *);
100 static void ieee80211_node_table_cleanup(struct ieee80211_node_table *nt);
101 static void ieee80211_erp_timeout(struct ieee80211com *);
103 MALLOC_DEFINE(M_80211_NODE, "80211node", "802.11 node state");
104 MALLOC_DEFINE(M_80211_NODE_IE, "80211nodeie", "802.11 node ie");
107 ieee80211_node_attach(struct ieee80211com *ic)
109 /* XXX really want maxlen enforced per-sta */
110 ieee80211_ageq_init(&ic->ic_stageq, ic->ic_max_keyix * 8,
112 ieee80211_node_table_init(ic, &ic->ic_sta, "station",
113 IEEE80211_INACT_INIT, ic->ic_max_keyix);
114 callout_init(&ic->ic_inact, CALLOUT_MPSAFE);
115 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz,
116 ieee80211_node_timeout, ic);
118 ic->ic_node_alloc = node_alloc;
119 ic->ic_node_free = node_free;
120 ic->ic_node_cleanup = node_cleanup;
121 ic->ic_node_age = node_age;
122 ic->ic_node_drain = node_age; /* NB: same as age */
123 ic->ic_node_getrssi = node_getrssi;
124 ic->ic_node_getsignal = node_getsignal;
125 ic->ic_node_getmimoinfo = node_getmimoinfo;
128 * Set flags to be propagated to all vap's;
129 * these define default behaviour/configuration.
131 ic->ic_flags_ext |= IEEE80211_FEXT_INACT; /* inactivity processing */
135 ieee80211_node_detach(struct ieee80211com *ic)
138 callout_drain(&ic->ic_inact);
139 ieee80211_node_table_cleanup(&ic->ic_sta);
140 ieee80211_ageq_cleanup(&ic->ic_stageq);
144 ieee80211_node_vattach(struct ieee80211vap *vap)
146 /* NB: driver can override */
147 vap->iv_max_aid = IEEE80211_AID_DEF;
149 /* default station inactivity timer setings */
150 vap->iv_inact_init = IEEE80211_INACT_INIT;
151 vap->iv_inact_auth = IEEE80211_INACT_AUTH;
152 vap->iv_inact_run = IEEE80211_INACT_RUN;
153 vap->iv_inact_probe = IEEE80211_INACT_PROBE;
155 IEEE80211_DPRINTF(vap, IEEE80211_MSG_INACT,
156 "%s: init %u auth %u run %u probe %u\n", __func__,
157 vap->iv_inact_init, vap->iv_inact_auth,
158 vap->iv_inact_run, vap->iv_inact_probe);
162 ieee80211_node_latevattach(struct ieee80211vap *vap)
164 if (vap->iv_opmode == IEEE80211_M_HOSTAP) {
165 /* XXX should we allow max aid to be zero? */
166 if (vap->iv_max_aid < IEEE80211_AID_MIN) {
167 vap->iv_max_aid = IEEE80211_AID_MIN;
168 if_printf(vap->iv_ifp,
169 "WARNING: max aid too small, changed to %d\n",
172 vap->iv_aid_bitmap = (uint32_t *) malloc(
173 howmany(vap->iv_max_aid, 32) * sizeof(uint32_t),
174 M_80211_NODE, M_NOWAIT | M_ZERO);
175 if (vap->iv_aid_bitmap == NULL) {
176 /* XXX no way to recover */
177 printf("%s: no memory for AID bitmap, max aid %d!\n",
178 __func__, vap->iv_max_aid);
183 ieee80211_reset_bss(vap);
185 vap->iv_auth = ieee80211_authenticator_get(vap->iv_bss->ni_authmode);
189 ieee80211_node_vdetach(struct ieee80211vap *vap)
191 struct ieee80211com *ic = vap->iv_ic;
193 ieee80211_node_table_reset(&ic->ic_sta, vap);
194 if (vap->iv_bss != NULL) {
195 ieee80211_free_node(vap->iv_bss);
198 if (vap->iv_aid_bitmap != NULL) {
199 free(vap->iv_aid_bitmap, M_80211_NODE);
200 vap->iv_aid_bitmap = NULL;
205 * Port authorize/unauthorize interfaces for use by an authenticator.
209 ieee80211_node_authorize(struct ieee80211_node *ni)
211 struct ieee80211vap *vap = ni->ni_vap;
213 ni->ni_flags |= IEEE80211_NODE_AUTH;
214 ni->ni_inact_reload = vap->iv_inact_run;
215 ni->ni_inact = ni->ni_inact_reload;
217 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni,
218 "%s: inact_reload %u", __func__, ni->ni_inact_reload);
222 ieee80211_node_unauthorize(struct ieee80211_node *ni)
224 struct ieee80211vap *vap = ni->ni_vap;
226 ni->ni_flags &= ~IEEE80211_NODE_AUTH;
227 ni->ni_inact_reload = vap->iv_inact_auth;
228 if (ni->ni_inact > ni->ni_inact_reload)
229 ni->ni_inact = ni->ni_inact_reload;
231 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni,
232 "%s: inact_reload %u inact %u", __func__,
233 ni->ni_inact_reload, ni->ni_inact);
237 * Fix tx parameters for a node according to ``association state''.
240 ieee80211_node_setuptxparms(struct ieee80211_node *ni)
242 struct ieee80211vap *vap = ni->ni_vap;
243 enum ieee80211_phymode mode;
245 if (ni->ni_flags & IEEE80211_NODE_HT) {
246 if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan))
247 mode = IEEE80211_MODE_11NA;
249 mode = IEEE80211_MODE_11NG;
250 } else { /* legacy rate handling */
251 if (IEEE80211_IS_CHAN_ST(ni->ni_chan))
252 mode = IEEE80211_MODE_STURBO_A;
253 else if (IEEE80211_IS_CHAN_HALF(ni->ni_chan))
254 mode = IEEE80211_MODE_HALF;
255 else if (IEEE80211_IS_CHAN_QUARTER(ni->ni_chan))
256 mode = IEEE80211_MODE_QUARTER;
257 /* NB: 108A should be handled as 11a */
258 else if (IEEE80211_IS_CHAN_A(ni->ni_chan))
259 mode = IEEE80211_MODE_11A;
260 else if (IEEE80211_IS_CHAN_108G(ni->ni_chan) ||
261 (ni->ni_flags & IEEE80211_NODE_ERP))
262 mode = IEEE80211_MODE_11G;
264 mode = IEEE80211_MODE_11B;
266 ni->ni_txparms = &vap->iv_txparms[mode];
270 * Set/change the channel. The rate set is also updated as
271 * to insure a consistent view by drivers.
272 * XXX should be private but hostap needs it to deal with CSA
275 ieee80211_node_set_chan(struct ieee80211_node *ni,
276 struct ieee80211_channel *chan)
278 struct ieee80211com *ic = ni->ni_ic;
279 struct ieee80211vap *vap = ni->ni_vap;
280 enum ieee80211_phymode mode;
282 KASSERT(chan != IEEE80211_CHAN_ANYC, ("no channel"));
285 mode = ieee80211_chan2mode(chan);
286 if (IEEE80211_IS_CHAN_HT(chan)) {
288 * XXX Gotta be careful here; the rate set returned by
289 * ieee80211_get_suprates is actually any HT rate
290 * set so blindly copying it will be bad. We must
291 * install the legacy rate est in ni_rates and the
292 * HT rate set in ni_htrates.
294 ni->ni_htrates = *ieee80211_get_suphtrates(ic, chan);
296 * Setup bss tx parameters based on operating mode. We
297 * use legacy rates when operating in a mixed HT+non-HT bss
298 * and non-ERP rates in 11g for mixed ERP+non-ERP bss.
300 if (mode == IEEE80211_MODE_11NA &&
301 (vap->iv_flags_ht & IEEE80211_FHT_PUREN) == 0)
302 mode = IEEE80211_MODE_11A;
303 else if (mode == IEEE80211_MODE_11NG &&
304 (vap->iv_flags_ht & IEEE80211_FHT_PUREN) == 0)
305 mode = IEEE80211_MODE_11G;
306 if (mode == IEEE80211_MODE_11G &&
307 (vap->iv_flags & IEEE80211_F_PUREG) == 0)
308 mode = IEEE80211_MODE_11B;
310 ni->ni_txparms = &vap->iv_txparms[mode];
311 ni->ni_rates = *ieee80211_get_suprates(ic, chan);
315 copy_bss(struct ieee80211_node *nbss, const struct ieee80211_node *obss)
317 /* propagate useful state */
318 nbss->ni_authmode = obss->ni_authmode;
319 nbss->ni_txpower = obss->ni_txpower;
320 nbss->ni_vlan = obss->ni_vlan;
321 /* XXX statistics? */
322 /* XXX legacy WDS bssid? */
326 ieee80211_create_ibss(struct ieee80211vap* vap, struct ieee80211_channel *chan)
328 struct ieee80211com *ic = vap->iv_ic;
329 struct ieee80211_node *ni;
331 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN,
332 "%s: creating %s on channel %u\n", __func__,
333 ieee80211_opmode_name[vap->iv_opmode],
334 ieee80211_chan2ieee(ic, chan));
336 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr);
341 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr);
342 ni->ni_esslen = vap->iv_des_ssid[0].len;
343 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen);
344 if (vap->iv_bss != NULL)
345 copy_bss(ni, vap->iv_bss);
346 ni->ni_intval = ic->ic_bintval;
347 if (vap->iv_flags & IEEE80211_F_PRIVACY)
348 ni->ni_capinfo |= IEEE80211_CAPINFO_PRIVACY;
349 if (ic->ic_phytype == IEEE80211_T_FH) {
350 ni->ni_fhdwell = 200; /* XXX */
353 if (vap->iv_opmode == IEEE80211_M_IBSS) {
354 vap->iv_flags |= IEEE80211_F_SIBSS;
355 ni->ni_capinfo |= IEEE80211_CAPINFO_IBSS; /* XXX */
356 if (vap->iv_flags & IEEE80211_F_DESBSSID)
357 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid);
359 get_random_bytes(ni->ni_bssid, IEEE80211_ADDR_LEN);
360 /* clear group bit, add local bit */
361 ni->ni_bssid[0] = (ni->ni_bssid[0] &~ 0x01) | 0x02;
363 } else if (vap->iv_opmode == IEEE80211_M_AHDEMO) {
364 if (vap->iv_flags & IEEE80211_F_DESBSSID)
365 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid);
367 #ifdef IEEE80211_SUPPORT_TDMA
368 if ((vap->iv_caps & IEEE80211_C_TDMA) == 0)
370 memset(ni->ni_bssid, 0, IEEE80211_ADDR_LEN);
371 #ifdef IEEE80211_SUPPORT_MESH
372 } else if (vap->iv_opmode == IEEE80211_M_MBSS) {
373 ni->ni_meshidlen = vap->iv_mesh->ms_idlen;
374 memcpy(ni->ni_meshid, vap->iv_mesh->ms_id, ni->ni_meshidlen);
378 * Fix the channel and related attributes.
380 /* clear DFS CAC state on previous channel */
381 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC &&
382 ic->ic_bsschan->ic_freq != chan->ic_freq &&
383 IEEE80211_IS_CHAN_CACDONE(ic->ic_bsschan))
384 ieee80211_dfs_cac_clear(ic, ic->ic_bsschan);
385 ic->ic_bsschan = chan;
386 ieee80211_node_set_chan(ni, chan);
387 ic->ic_curmode = ieee80211_chan2mode(chan);
389 * Do mode-specific setup.
391 if (IEEE80211_IS_CHAN_FULL(chan)) {
392 if (IEEE80211_IS_CHAN_ANYG(chan)) {
394 * Use a mixed 11b/11g basic rate set.
396 ieee80211_setbasicrates(&ni->ni_rates,
398 if (vap->iv_flags & IEEE80211_F_PUREG) {
400 * Also mark OFDM rates basic so 11b
401 * stations do not join (WiFi compliance).
403 ieee80211_addbasicrates(&ni->ni_rates,
406 } else if (IEEE80211_IS_CHAN_B(chan)) {
408 * Force pure 11b rate set.
410 ieee80211_setbasicrates(&ni->ni_rates,
415 (void) ieee80211_sta_join1(ieee80211_ref_node(ni));
419 * Reset bss state on transition to the INIT state.
420 * Clear any stations from the table (they have been
421 * deauth'd) and reset the bss node (clears key, rate
425 ieee80211_reset_bss(struct ieee80211vap *vap)
427 struct ieee80211com *ic = vap->iv_ic;
428 struct ieee80211_node *ni, *obss;
430 ieee80211_node_table_reset(&ic->ic_sta, vap);
431 /* XXX multi-bss: wrong */
432 ieee80211_reset_erp(ic);
434 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr);
435 KASSERT(ni != NULL, ("unable to setup initial BSS node"));
437 vap->iv_bss = ieee80211_ref_node(ni);
440 ni->ni_intval = ic->ic_bintval;
441 ieee80211_free_node(obss);
443 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr);
447 match_ssid(const struct ieee80211_node *ni,
448 int nssid, const struct ieee80211_scan_ssid ssids[])
452 for (i = 0; i < nssid; i++) {
453 if (ni->ni_esslen == ssids[i].len &&
454 memcmp(ni->ni_essid, ssids[i].ssid, ni->ni_esslen) == 0)
461 * Test a node for suitability/compatibility.
464 check_bss(struct ieee80211vap *vap, struct ieee80211_node *ni)
466 struct ieee80211com *ic = ni->ni_ic;
469 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan)))
471 if (vap->iv_opmode == IEEE80211_M_IBSS) {
472 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0)
475 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0)
478 if (vap->iv_flags & IEEE80211_F_PRIVACY) {
479 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0)
482 /* XXX does this mean privacy is supported or required? */
483 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY)
486 rate = ieee80211_fix_rate(ni, &ni->ni_rates,
487 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE);
488 if (rate & IEEE80211_RATE_BASIC)
490 if (vap->iv_des_nssid != 0 &&
491 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid))
493 if ((vap->iv_flags & IEEE80211_F_DESBSSID) &&
494 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid))
499 #ifdef IEEE80211_DEBUG
501 * Display node suitability/compatibility.
504 check_bss_debug(struct ieee80211vap *vap, struct ieee80211_node *ni)
506 struct ieee80211com *ic = ni->ni_ic;
511 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan)))
513 if (vap->iv_opmode == IEEE80211_M_IBSS) {
514 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0)
517 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0)
520 if (vap->iv_flags & IEEE80211_F_PRIVACY) {
521 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0)
524 /* XXX does this mean privacy is supported or required? */
525 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY)
528 rate = ieee80211_fix_rate(ni, &ni->ni_rates,
529 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE);
530 if (rate & IEEE80211_RATE_BASIC)
532 if (vap->iv_des_nssid != 0 &&
533 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid))
535 if ((vap->iv_flags & IEEE80211_F_DESBSSID) &&
536 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid))
539 printf(" %c %s", fail ? '-' : '+', ether_sprintf(ni->ni_macaddr));
540 printf(" %s%c", ether_sprintf(ni->ni_bssid), fail & 0x20 ? '!' : ' ');
542 ieee80211_chan2ieee(ic, ni->ni_chan), fail & 0x01 ? '!' : ' ');
543 printf(" %2dM%c", (rate & IEEE80211_RATE_VAL) / 2,
544 fail & 0x08 ? '!' : ' ');
546 (ni->ni_capinfo & IEEE80211_CAPINFO_ESS) ? "ess" :
547 (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) ? "ibss" :
549 fail & 0x02 ? '!' : ' ');
551 (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) ? "wep" : "no",
552 fail & 0x04 ? '!' : ' ');
553 ieee80211_print_essid(ni->ni_essid, ni->ni_esslen);
554 printf("%s\n", fail & 0x10 ? "!" : "");
556 #endif /* IEEE80211_DEBUG */
559 * Handle 802.11 ad hoc network merge. The
560 * convention, set by the Wireless Ethernet Compatibility Alliance
561 * (WECA), is that an 802.11 station will change its BSSID to match
562 * the "oldest" 802.11 ad hoc network, on the same channel, that
563 * has the station's desired SSID. The "oldest" 802.11 network
564 * sends beacons with the greatest TSF timestamp.
566 * The caller is assumed to validate TSF's before attempting a merge.
568 * Return !0 if the BSSID changed, 0 otherwise.
571 ieee80211_ibss_merge(struct ieee80211_node *ni)
573 struct ieee80211vap *vap = ni->ni_vap;
574 #ifdef IEEE80211_DEBUG
575 struct ieee80211com *ic = ni->ni_ic;
578 if (ni == vap->iv_bss ||
579 IEEE80211_ADDR_EQ(ni->ni_bssid, vap->iv_bss->ni_bssid)) {
580 /* unchanged, nothing to do */
583 if (!check_bss(vap, ni)) {
584 /* capabilities mismatch */
585 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC,
586 "%s: merge failed, capabilities mismatch\n", __func__);
587 #ifdef IEEE80211_DEBUG
588 if (ieee80211_msg_assoc(vap))
589 check_bss_debug(vap, ni);
591 vap->iv_stats.is_ibss_capmismatch++;
594 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC,
595 "%s: new bssid %s: %s preamble, %s slot time%s\n", __func__,
596 ether_sprintf(ni->ni_bssid),
597 ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long",
598 ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long",
599 ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : ""
601 return ieee80211_sta_join1(ieee80211_ref_node(ni));
605 * Calculate HT channel promotion flags for all vaps.
606 * This assumes ni_chan have been setup for each vap.
609 gethtadjustflags(struct ieee80211com *ic)
611 struct ieee80211vap *vap;
616 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
617 if (vap->iv_state < IEEE80211_S_RUN)
619 switch (vap->iv_opmode) {
620 case IEEE80211_M_WDS:
621 case IEEE80211_M_STA:
622 case IEEE80211_M_AHDEMO:
623 case IEEE80211_M_HOSTAP:
624 case IEEE80211_M_IBSS:
625 case IEEE80211_M_MBSS:
626 flags |= ieee80211_htchanflags(vap->iv_bss->ni_chan);
636 * Check if the current channel needs to change based on whether
637 * any vap's are using HT20/HT40. This is used to sync the state
638 * of ic_curchan after a channel width change on a running vap.
641 ieee80211_sync_curchan(struct ieee80211com *ic)
643 struct ieee80211_channel *c;
645 c = ieee80211_ht_adjust_channel(ic, ic->ic_curchan, gethtadjustflags(ic));
646 if (c != ic->ic_curchan) {
648 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan);
649 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan);
650 IEEE80211_UNLOCK(ic);
651 ic->ic_set_channel(ic);
652 ieee80211_radiotap_chan_change(ic);
658 * Setup the current channel. The request channel may be
659 * promoted if other vap's are operating with HT20/HT40.
662 ieee80211_setupcurchan(struct ieee80211com *ic, struct ieee80211_channel *c)
664 if (ic->ic_htcaps & IEEE80211_HTC_HT) {
665 int flags = gethtadjustflags(ic);
667 * Check for channel promotion required to support the
668 * set of running vap's. This assumes we are called
669 * after ni_chan is setup for each vap.
671 /* NB: this assumes IEEE80211_FHT_USEHT40 > IEEE80211_FHT_HT */
672 if (flags > ieee80211_htchanflags(c))
673 c = ieee80211_ht_adjust_channel(ic, c, flags);
675 ic->ic_bsschan = ic->ic_curchan = c;
676 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan);
677 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan);
681 * Change the current channel. The channel change is guaranteed to have
682 * happened before the next state change.
685 ieee80211_setcurchan(struct ieee80211com *ic, struct ieee80211_channel *c)
687 ieee80211_setupcurchan(ic, c);
688 ieee80211_runtask(ic, &ic->ic_chan_task);
692 * Join the specified IBSS/BSS network. The node is assumed to
693 * be passed in with a held reference.
696 ieee80211_sta_join1(struct ieee80211_node *selbs)
698 struct ieee80211vap *vap = selbs->ni_vap;
699 struct ieee80211com *ic = selbs->ni_ic;
700 struct ieee80211_node *obss;
704 * Committed to selbs, setup state.
708 * Check if old+new node have the same address in which
709 * case we can reassociate when operating in sta mode.
711 canreassoc = (obss != NULL &&
712 vap->iv_state == IEEE80211_S_RUN &&
713 IEEE80211_ADDR_EQ(obss->ni_macaddr, selbs->ni_macaddr));
714 vap->iv_bss = selbs; /* NB: caller assumed to bump refcnt */
716 copy_bss(selbs, obss);
717 ieee80211_node_decref(obss); /* iv_bss reference */
718 ieee80211_free_node(obss); /* station table reference */
719 obss = NULL; /* NB: guard against later use */
723 * Delete unusable rates; we've already checked
724 * that the negotiated rate set is acceptable.
726 ieee80211_fix_rate(vap->iv_bss, &vap->iv_bss->ni_rates,
727 IEEE80211_F_DODEL | IEEE80211_F_JOIN);
729 ieee80211_setcurchan(ic, selbs->ni_chan);
731 * Set the erp state (mostly the slot time) to deal with
732 * the auto-select case; this should be redundant if the
735 ieee80211_reset_erp(ic);
736 ieee80211_wme_initparams(vap);
738 if (vap->iv_opmode == IEEE80211_M_STA) {
741 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 1);
744 * Act as if we received a DEAUTH frame in case we
745 * are invoked from the RUN state. This will cause
746 * us to try to re-authenticate if we are operating
749 ieee80211_new_state(vap, IEEE80211_S_AUTH,
750 IEEE80211_FC0_SUBTYPE_DEAUTH);
753 ieee80211_new_state(vap, IEEE80211_S_RUN, -1);
758 ieee80211_sta_join(struct ieee80211vap *vap, struct ieee80211_channel *chan,
759 const struct ieee80211_scan_entry *se)
761 struct ieee80211com *ic = vap->iv_ic;
762 struct ieee80211_node *ni;
764 ni = ieee80211_alloc_node(&ic->ic_sta, vap, se->se_macaddr);
770 * Expand scan state into node's format.
771 * XXX may not need all this stuff
773 IEEE80211_ADDR_COPY(ni->ni_bssid, se->se_bssid);
774 ni->ni_esslen = se->se_ssid[1];
775 memcpy(ni->ni_essid, se->se_ssid+2, ni->ni_esslen);
776 ni->ni_tstamp.tsf = se->se_tstamp.tsf;
777 ni->ni_intval = se->se_intval;
778 ni->ni_capinfo = se->se_capinfo;
780 ni->ni_timoff = se->se_timoff;
781 ni->ni_fhdwell = se->se_fhdwell;
782 ni->ni_fhindex = se->se_fhindex;
783 ni->ni_erp = se->se_erp;
784 IEEE80211_RSSI_LPF(ni->ni_avgrssi, se->se_rssi);
785 ni->ni_noise = se->se_noise;
786 if (vap->iv_opmode == IEEE80211_M_STA) {
787 /* NB: only infrastructure mode requires an associd */
788 ni->ni_flags |= IEEE80211_NODE_ASSOCID;
791 if (ieee80211_ies_init(&ni->ni_ies, se->se_ies.data, se->se_ies.len)) {
792 ieee80211_ies_expand(&ni->ni_ies);
793 #ifdef IEEE80211_SUPPORT_SUPERG
794 if (ni->ni_ies.ath_ie != NULL)
795 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie);
797 if (ni->ni_ies.htcap_ie != NULL)
798 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie);
799 if (ni->ni_ies.htinfo_ie != NULL)
800 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie);
801 #ifdef IEEE80211_SUPPORT_MESH
802 if (ni->ni_ies.meshid_ie != NULL)
803 ieee80211_parse_meshid(ni, ni->ni_ies.meshid_ie);
805 #ifdef IEEE80211_SUPPORT_TDMA
806 if (ni->ni_ies.tdma_ie != NULL)
807 ieee80211_parse_tdma(ni, ni->ni_ies.tdma_ie);
811 vap->iv_dtim_period = se->se_dtimperiod;
812 vap->iv_dtim_count = 0;
814 /* NB: must be after ni_chan is setup */
815 ieee80211_setup_rates(ni, se->se_rates, se->se_xrates,
817 if (ieee80211_iserp_rateset(&ni->ni_rates))
818 ni->ni_flags |= IEEE80211_NODE_ERP;
819 ieee80211_node_setuptxparms(ni);
820 ieee80211_ratectl_node_init(ni);
822 return ieee80211_sta_join1(ieee80211_ref_node(ni));
826 * Leave the specified IBSS/BSS network. The node is assumed to
827 * be passed in with a held reference.
830 ieee80211_sta_leave(struct ieee80211_node *ni)
832 struct ieee80211com *ic = ni->ni_ic;
834 ic->ic_node_cleanup(ni);
835 ieee80211_notify_node_leave(ni);
839 * Send a deauthenticate frame and drop the station.
842 ieee80211_node_deauth(struct ieee80211_node *ni, int reason)
844 /* NB: bump the refcnt to be sure temporay nodes are not reclaimed */
845 ieee80211_ref_node(ni);
846 if (ni->ni_associd != 0)
847 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH, reason);
848 ieee80211_node_leave(ni);
849 ieee80211_free_node(ni);
852 static struct ieee80211_node *
853 node_alloc(struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN])
855 struct ieee80211_node *ni;
857 ni = (struct ieee80211_node *) malloc(sizeof(struct ieee80211_node),
858 M_80211_NODE, M_NOWAIT | M_ZERO);
863 * Initialize an ie blob with the specified data. If previous
864 * data exists re-use the data block. As a side effect we clear
865 * all references to specific ie's; the caller is required to
869 ieee80211_ies_init(struct ieee80211_ies *ies, const uint8_t *data, int len)
871 /* NB: assumes data+len are the last fields */
872 memset(ies, 0, offsetof(struct ieee80211_ies, data));
873 if (ies->data != NULL && ies->len != len) {
874 /* data size changed */
875 free(ies->data, M_80211_NODE_IE);
878 if (ies->data == NULL) {
879 ies->data = (uint8_t *) malloc(len, M_80211_NODE_IE, M_NOWAIT);
880 if (ies->data == NULL) {
882 /* NB: pointers have already been zero'd above */
886 memcpy(ies->data, data, len);
892 * Reclaim storage for an ie blob.
895 ieee80211_ies_cleanup(struct ieee80211_ies *ies)
897 if (ies->data != NULL)
898 free(ies->data, M_80211_NODE_IE);
902 * Expand an ie blob data contents and to fillin individual
903 * ie pointers. The data blob is assumed to be well-formed;
904 * we don't do any validity checking of ie lengths.
907 ieee80211_ies_expand(struct ieee80211_ies *ies)
916 case IEEE80211_ELEMID_VENDOR:
919 else if (iswmeoui(ie))
921 #ifdef IEEE80211_SUPPORT_SUPERG
922 else if (isatherosoui(ie))
925 #ifdef IEEE80211_SUPPORT_TDMA
926 else if (istdmaoui(ie))
930 case IEEE80211_ELEMID_RSN:
933 case IEEE80211_ELEMID_HTCAP:
936 #ifdef IEEE80211_SUPPORT_MESH
937 case IEEE80211_ELEMID_MESHID:
948 * Reclaim any resources in a node and reset any critical
949 * state. Typically nodes are free'd immediately after,
950 * but in some cases the storage may be reused so we need
951 * to insure consistent state (should probably fix that).
954 node_cleanup(struct ieee80211_node *ni)
956 #define N(a) (sizeof(a)/sizeof(a[0]))
957 struct ieee80211vap *vap = ni->ni_vap;
958 struct ieee80211com *ic = ni->ni_ic;
961 /* NB: preserve ni_table */
962 if (ni->ni_flags & IEEE80211_NODE_PWR_MGT) {
963 if (vap->iv_opmode != IEEE80211_M_STA)
965 ni->ni_flags &= ~IEEE80211_NODE_PWR_MGT;
966 IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni,
967 "power save mode off, %u sta's in ps mode", vap->iv_ps_sta);
970 * Cleanup any HT-related state.
972 if (ni->ni_flags & IEEE80211_NODE_HT)
973 ieee80211_ht_node_cleanup(ni);
974 #ifdef IEEE80211_SUPPORT_SUPERG
975 else if (ni->ni_ath_flags & IEEE80211_NODE_ATH)
976 ieee80211_ff_node_cleanup(ni);
978 #ifdef IEEE80211_SUPPORT_MESH
980 * Cleanup any mesh-related state.
982 if (vap->iv_opmode == IEEE80211_M_MBSS)
983 ieee80211_mesh_node_cleanup(ni);
986 * Clear any staging queue entries.
988 ieee80211_ageq_drain_node(&ic->ic_stageq, ni);
991 * Clear AREF flag that marks the authorization refcnt bump
992 * has happened. This is probably not needed as the node
993 * should always be removed from the table so not found but
994 * do it just in case.
995 * Likewise clear the ASSOCID flag as these flags are intended
996 * to be managed in tandem.
998 ni->ni_flags &= ~(IEEE80211_NODE_AREF | IEEE80211_NODE_ASSOCID);
1001 * Drain power save queue and, if needed, clear TIM.
1003 if (ieee80211_node_psq_drain(ni) != 0 && vap->iv_set_tim != NULL)
1004 vap->iv_set_tim(ni, 0);
1007 if (ni->ni_challenge != NULL) {
1008 free(ni->ni_challenge, M_80211_NODE);
1009 ni->ni_challenge = NULL;
1012 * Preserve SSID, WPA, and WME ie's so the bss node is
1013 * reusable during a re-auth/re-assoc state transition.
1014 * If we remove these data they will not be recreated
1015 * because they come from a probe-response or beacon frame
1016 * which cannot be expected prior to the association-response.
1017 * This should not be an issue when operating in other modes
1018 * as stations leaving always go through a full state transition
1019 * which will rebuild this state.
1021 * XXX does this leave us open to inheriting old state?
1023 for (i = 0; i < N(ni->ni_rxfrag); i++)
1024 if (ni->ni_rxfrag[i] != NULL) {
1025 m_freem(ni->ni_rxfrag[i]);
1026 ni->ni_rxfrag[i] = NULL;
1029 * Must be careful here to remove any key map entry w/o a LOR.
1031 ieee80211_node_delucastkey(ni);
1036 node_free(struct ieee80211_node *ni)
1038 struct ieee80211com *ic = ni->ni_ic;
1040 ieee80211_ratectl_node_deinit(ni);
1041 ic->ic_node_cleanup(ni);
1042 ieee80211_ies_cleanup(&ni->ni_ies);
1043 ieee80211_psq_cleanup(&ni->ni_psq);
1044 free(ni, M_80211_NODE);
1048 node_age(struct ieee80211_node *ni)
1050 struct ieee80211vap *vap = ni->ni_vap;
1052 IEEE80211_NODE_LOCK_ASSERT(&vap->iv_ic->ic_sta);
1055 * Age frames on the power save queue.
1057 if (ieee80211_node_psq_age(ni) != 0 &&
1058 ni->ni_psq.psq_len == 0 && vap->iv_set_tim != NULL)
1059 vap->iv_set_tim(ni, 0);
1061 * Age out HT resources (e.g. frames on the
1062 * A-MPDU reorder queues).
1064 if (ni->ni_associd != 0 && (ni->ni_flags & IEEE80211_NODE_HT))
1065 ieee80211_ht_node_age(ni);
1069 node_getrssi(const struct ieee80211_node *ni)
1071 uint32_t avgrssi = ni->ni_avgrssi;
1074 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER)
1076 rssi = IEEE80211_RSSI_GET(avgrssi);
1077 return rssi < 0 ? 0 : rssi > 127 ? 127 : rssi;
1081 node_getsignal(const struct ieee80211_node *ni, int8_t *rssi, int8_t *noise)
1083 *rssi = node_getrssi(ni);
1084 *noise = ni->ni_noise;
1088 node_getmimoinfo(const struct ieee80211_node *ni,
1089 struct ieee80211_mimo_info *info)
1091 /* XXX zero data? */
1094 struct ieee80211_node *
1095 ieee80211_alloc_node(struct ieee80211_node_table *nt,
1096 struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN])
1098 struct ieee80211com *ic = nt->nt_ic;
1099 struct ieee80211_node *ni;
1102 ni = ic->ic_node_alloc(vap, macaddr);
1104 vap->iv_stats.is_rx_nodealloc++;
1108 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1109 "%s %p<%s> in %s table\n", __func__, ni,
1110 ether_sprintf(macaddr), nt->nt_name);
1112 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr);
1113 hash = IEEE80211_NODE_HASH(ic, macaddr);
1114 ieee80211_node_initref(ni); /* mark referenced */
1115 ni->ni_chan = IEEE80211_CHAN_ANYC;
1116 ni->ni_authmode = IEEE80211_AUTH_OPEN;
1117 ni->ni_txpower = ic->ic_txpowlimit; /* max power */
1118 ni->ni_txparms = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)];
1119 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE);
1120 ni->ni_avgrssi = IEEE80211_RSSI_DUMMY_MARKER;
1121 ni->ni_inact_reload = nt->nt_inact_init;
1122 ni->ni_inact = ni->ni_inact_reload;
1123 ni->ni_ath_defkeyix = 0x7fff;
1124 ieee80211_psq_init(&ni->ni_psq, "unknown");
1125 #ifdef IEEE80211_SUPPORT_MESH
1126 if (vap->iv_opmode == IEEE80211_M_MBSS)
1127 ieee80211_mesh_node_init(vap, ni);
1129 IEEE80211_NODE_LOCK(nt);
1130 TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list);
1131 LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash);
1135 IEEE80211_NODE_UNLOCK(nt);
1137 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni,
1138 "%s: inact_reload %u", __func__, ni->ni_inact_reload);
1144 * Craft a temporary node suitable for sending a management frame
1145 * to the specified station. We craft only as much state as we
1146 * need to do the work since the node will be immediately reclaimed
1147 * once the send completes.
1149 struct ieee80211_node *
1150 ieee80211_tmp_node(struct ieee80211vap *vap,
1151 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1153 struct ieee80211com *ic = vap->iv_ic;
1154 struct ieee80211_node *ni;
1156 ni = ic->ic_node_alloc(vap, macaddr);
1158 struct ieee80211_node *bss = vap->iv_bss;
1160 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1161 "%s %p<%s>\n", __func__, ni, ether_sprintf(macaddr));
1163 ni->ni_table = NULL; /* NB: pedantic */
1164 ni->ni_ic = ic; /* NB: needed to set channel */
1167 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr);
1168 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid);
1169 ieee80211_node_initref(ni); /* mark referenced */
1170 /* NB: required by ieee80211_fix_rate */
1171 ieee80211_node_set_chan(ni, bss->ni_chan);
1172 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey,
1173 IEEE80211_KEYIX_NONE);
1174 ni->ni_txpower = bss->ni_txpower;
1175 /* XXX optimize away */
1176 ieee80211_psq_init(&ni->ni_psq, "unknown");
1179 vap->iv_stats.is_rx_nodealloc++;
1184 struct ieee80211_node *
1185 ieee80211_dup_bss(struct ieee80211vap *vap,
1186 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1188 struct ieee80211com *ic = vap->iv_ic;
1189 struct ieee80211_node *ni;
1191 ni = ieee80211_alloc_node(&ic->ic_sta, vap, macaddr);
1193 struct ieee80211_node *bss = vap->iv_bss;
1195 * Inherit from iv_bss.
1198 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid);
1199 ieee80211_node_set_chan(ni, bss->ni_chan);
1205 * Create a bss node for a legacy WDS vap. The far end does
1206 * not associate so we just create create a new node and
1207 * simulate an association. The caller is responsible for
1208 * installing the node as the bss node and handling any further
1209 * setup work like authorizing the port.
1211 struct ieee80211_node *
1212 ieee80211_node_create_wds(struct ieee80211vap *vap,
1213 const uint8_t bssid[IEEE80211_ADDR_LEN], struct ieee80211_channel *chan)
1215 struct ieee80211com *ic = vap->iv_ic;
1216 struct ieee80211_node *ni;
1218 /* XXX check if node already in sta table? */
1219 ni = ieee80211_alloc_node(&ic->ic_sta, vap, bssid);
1221 ni->ni_wdsvap = vap;
1222 IEEE80211_ADDR_COPY(ni->ni_bssid, bssid);
1224 * Inherit any manually configured settings.
1226 copy_bss(ni, vap->iv_bss);
1227 ieee80211_node_set_chan(ni, chan);
1228 /* NB: propagate ssid so available to WPA supplicant */
1229 ni->ni_esslen = vap->iv_des_ssid[0].len;
1230 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen);
1231 /* NB: no associd for peer */
1233 * There are no management frames to use to
1234 * discover neighbor capabilities, so blindly
1235 * propagate the local configuration.
1237 if (vap->iv_flags & IEEE80211_F_WME)
1238 ni->ni_flags |= IEEE80211_NODE_QOS;
1239 #ifdef IEEE80211_SUPPORT_SUPERG
1240 if (vap->iv_flags & IEEE80211_F_FF)
1241 ni->ni_flags |= IEEE80211_NODE_FF;
1243 if ((ic->ic_htcaps & IEEE80211_HTC_HT) &&
1244 (vap->iv_flags_ht & IEEE80211_FHT_HT)) {
1246 * Device is HT-capable and HT is enabled for
1247 * the vap; setup HT operation. On return
1248 * ni_chan will be adjusted to an HT channel.
1250 ieee80211_ht_wds_init(ni);
1252 struct ieee80211_channel *c = ni->ni_chan;
1254 * Force a legacy channel to be used.
1256 c = ieee80211_find_channel(ic,
1257 c->ic_freq, c->ic_flags &~ IEEE80211_CHAN_HT);
1258 KASSERT(c != NULL, ("no legacy channel, %u/%x",
1259 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags));
1266 struct ieee80211_node *
1267 #ifdef IEEE80211_DEBUG_REFCNT
1268 ieee80211_find_node_locked_debug(struct ieee80211_node_table *nt,
1269 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line)
1271 ieee80211_find_node_locked(struct ieee80211_node_table *nt,
1272 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1275 struct ieee80211_node *ni;
1278 IEEE80211_NODE_LOCK_ASSERT(nt);
1280 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr);
1281 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) {
1282 if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) {
1283 ieee80211_ref_node(ni); /* mark referenced */
1284 #ifdef IEEE80211_DEBUG_REFCNT
1285 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1286 "%s (%s:%u) %p<%s> refcnt %d\n", __func__,
1288 ni, ether_sprintf(ni->ni_macaddr),
1289 ieee80211_node_refcnt(ni));
1297 struct ieee80211_node *
1298 #ifdef IEEE80211_DEBUG_REFCNT
1299 ieee80211_find_node_debug(struct ieee80211_node_table *nt,
1300 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line)
1302 ieee80211_find_node(struct ieee80211_node_table *nt,
1303 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1306 struct ieee80211_node *ni;
1308 IEEE80211_NODE_LOCK(nt);
1309 ni = ieee80211_find_node_locked(nt, macaddr);
1310 IEEE80211_NODE_UNLOCK(nt);
1314 struct ieee80211_node *
1315 #ifdef IEEE80211_DEBUG_REFCNT
1316 ieee80211_find_vap_node_locked_debug(struct ieee80211_node_table *nt,
1317 const struct ieee80211vap *vap,
1318 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line)
1320 ieee80211_find_vap_node_locked(struct ieee80211_node_table *nt,
1321 const struct ieee80211vap *vap,
1322 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1325 struct ieee80211_node *ni;
1328 IEEE80211_NODE_LOCK_ASSERT(nt);
1330 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr);
1331 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) {
1332 if (ni->ni_vap == vap &&
1333 IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) {
1334 ieee80211_ref_node(ni); /* mark referenced */
1335 #ifdef IEEE80211_DEBUG_REFCNT
1336 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1337 "%s (%s:%u) %p<%s> refcnt %d\n", __func__,
1339 ni, ether_sprintf(ni->ni_macaddr),
1340 ieee80211_node_refcnt(ni));
1348 struct ieee80211_node *
1349 #ifdef IEEE80211_DEBUG_REFCNT
1350 ieee80211_find_vap_node_debug(struct ieee80211_node_table *nt,
1351 const struct ieee80211vap *vap,
1352 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line)
1354 ieee80211_find_vap_node(struct ieee80211_node_table *nt,
1355 const struct ieee80211vap *vap,
1356 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1359 struct ieee80211_node *ni;
1361 IEEE80211_NODE_LOCK(nt);
1362 ni = ieee80211_find_vap_node_locked(nt, vap, macaddr);
1363 IEEE80211_NODE_UNLOCK(nt);
1368 * Fake up a node; this handles node discovery in adhoc mode.
1369 * Note that for the driver's benefit we we treat this like
1370 * an association so the driver has an opportunity to setup
1371 * it's private state.
1373 struct ieee80211_node *
1374 ieee80211_fakeup_adhoc_node(struct ieee80211vap *vap,
1375 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1377 struct ieee80211_node *ni;
1379 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1380 "%s: mac<%s>\n", __func__, ether_sprintf(macaddr));
1381 ni = ieee80211_dup_bss(vap, macaddr);
1383 struct ieee80211com *ic = vap->iv_ic;
1385 /* XXX no rate negotiation; just dup */
1386 ni->ni_rates = vap->iv_bss->ni_rates;
1387 if (ieee80211_iserp_rateset(&ni->ni_rates))
1388 ni->ni_flags |= IEEE80211_NODE_ERP;
1389 if (vap->iv_opmode == IEEE80211_M_AHDEMO) {
1391 * In adhoc demo mode there are no management
1392 * frames to use to discover neighbor capabilities,
1393 * so blindly propagate the local configuration
1394 * so we can do interesting things (e.g. use
1395 * WME to disable ACK's).
1397 if (vap->iv_flags & IEEE80211_F_WME)
1398 ni->ni_flags |= IEEE80211_NODE_QOS;
1399 #ifdef IEEE80211_SUPPORT_SUPERG
1400 if (vap->iv_flags & IEEE80211_F_FF)
1401 ni->ni_flags |= IEEE80211_NODE_FF;
1404 ieee80211_node_setuptxparms(ni);
1405 ieee80211_ratectl_node_init(ni);
1406 if (ic->ic_newassoc != NULL)
1407 ic->ic_newassoc(ni, 1);
1408 /* XXX not right for 802.1x/WPA */
1409 ieee80211_node_authorize(ni);
1415 ieee80211_init_neighbor(struct ieee80211_node *ni,
1416 const struct ieee80211_frame *wh,
1417 const struct ieee80211_scanparams *sp)
1419 ni->ni_esslen = sp->ssid[1];
1420 memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]);
1421 IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3);
1422 memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp));
1423 ni->ni_intval = sp->bintval;
1424 ni->ni_capinfo = sp->capinfo;
1425 ni->ni_chan = ni->ni_ic->ic_curchan;
1426 ni->ni_fhdwell = sp->fhdwell;
1427 ni->ni_fhindex = sp->fhindex;
1428 ni->ni_erp = sp->erp;
1429 ni->ni_timoff = sp->timoff;
1430 #ifdef IEEE80211_SUPPORT_MESH
1431 if (ni->ni_vap->iv_opmode == IEEE80211_M_MBSS)
1432 ieee80211_mesh_init_neighbor(ni, wh, sp);
1434 if (ieee80211_ies_init(&ni->ni_ies, sp->ies, sp->ies_len)) {
1435 ieee80211_ies_expand(&ni->ni_ies);
1436 if (ni->ni_ies.wme_ie != NULL)
1437 ni->ni_flags |= IEEE80211_NODE_QOS;
1439 ni->ni_flags &= ~IEEE80211_NODE_QOS;
1440 #ifdef IEEE80211_SUPPORT_SUPERG
1441 if (ni->ni_ies.ath_ie != NULL)
1442 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie);
1446 /* NB: must be after ni_chan is setup */
1447 ieee80211_setup_rates(ni, sp->rates, sp->xrates,
1448 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE |
1449 IEEE80211_F_DONEGO | IEEE80211_F_DODEL);
1453 * Do node discovery in adhoc mode on receipt of a beacon
1454 * or probe response frame. Note that for the driver's
1455 * benefit we we treat this like an association so the
1456 * driver has an opportunity to setup it's private state.
1458 struct ieee80211_node *
1459 ieee80211_add_neighbor(struct ieee80211vap *vap,
1460 const struct ieee80211_frame *wh,
1461 const struct ieee80211_scanparams *sp)
1463 struct ieee80211_node *ni;
1465 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1466 "%s: mac<%s>\n", __func__, ether_sprintf(wh->i_addr2));
1467 ni = ieee80211_dup_bss(vap, wh->i_addr2);/* XXX alloc_node? */
1469 struct ieee80211com *ic = vap->iv_ic;
1471 ieee80211_init_neighbor(ni, wh, sp);
1472 if (ieee80211_iserp_rateset(&ni->ni_rates))
1473 ni->ni_flags |= IEEE80211_NODE_ERP;
1474 ieee80211_node_setuptxparms(ni);
1475 ieee80211_ratectl_node_init(ni);
1476 if (ic->ic_newassoc != NULL)
1477 ic->ic_newassoc(ni, 1);
1478 /* XXX not right for 802.1x/WPA */
1479 ieee80211_node_authorize(ni);
1484 #define IS_PROBEREQ(wh) \
1485 ((wh->i_fc[0] & (IEEE80211_FC0_TYPE_MASK|IEEE80211_FC0_SUBTYPE_MASK)) \
1486 == (IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ))
1487 #define IS_BCAST_PROBEREQ(wh) \
1488 (IS_PROBEREQ(wh) && IEEE80211_IS_MULTICAST( \
1489 ((const struct ieee80211_frame *)(wh))->i_addr3))
1491 static __inline struct ieee80211_node *
1492 _find_rxnode(struct ieee80211_node_table *nt,
1493 const struct ieee80211_frame_min *wh)
1495 if (IS_BCAST_PROBEREQ(wh))
1496 return NULL; /* spam bcast probe req to all vap's */
1497 return ieee80211_find_node_locked(nt, wh->i_addr2);
1501 * Locate the node for sender, track state, and then pass the
1502 * (referenced) node up to the 802.11 layer for its use. Note
1503 * we can return NULL if the sender is not in the table.
1505 struct ieee80211_node *
1506 #ifdef IEEE80211_DEBUG_REFCNT
1507 ieee80211_find_rxnode_debug(struct ieee80211com *ic,
1508 const struct ieee80211_frame_min *wh, const char *func, int line)
1510 ieee80211_find_rxnode(struct ieee80211com *ic,
1511 const struct ieee80211_frame_min *wh)
1514 struct ieee80211_node_table *nt;
1515 struct ieee80211_node *ni;
1518 IEEE80211_NODE_LOCK(nt);
1519 ni = _find_rxnode(nt, wh);
1520 IEEE80211_NODE_UNLOCK(nt);
1526 * Like ieee80211_find_rxnode but use the supplied h/w
1527 * key index as a hint to locate the node in the key
1528 * mapping table. If an entry is present at the key
1529 * index we return it; otherwise do a normal lookup and
1530 * update the mapping table if the station has a unicast
1531 * key assigned to it.
1533 struct ieee80211_node *
1534 #ifdef IEEE80211_DEBUG_REFCNT
1535 ieee80211_find_rxnode_withkey_debug(struct ieee80211com *ic,
1536 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix,
1537 const char *func, int line)
1539 ieee80211_find_rxnode_withkey(struct ieee80211com *ic,
1540 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix)
1543 struct ieee80211_node_table *nt;
1544 struct ieee80211_node *ni;
1547 IEEE80211_NODE_LOCK(nt);
1548 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax)
1549 ni = nt->nt_keyixmap[keyix];
1553 ni = _find_rxnode(nt, wh);
1554 if (ni != NULL && nt->nt_keyixmap != NULL) {
1556 * If the station has a unicast key cache slot
1557 * assigned update the key->node mapping table.
1559 keyix = ni->ni_ucastkey.wk_rxkeyix;
1560 /* XXX can keyixmap[keyix] != NULL? */
1561 if (keyix < nt->nt_keyixmax &&
1562 nt->nt_keyixmap[keyix] == NULL) {
1563 IEEE80211_DPRINTF(ni->ni_vap,
1565 "%s: add key map entry %p<%s> refcnt %d\n",
1566 __func__, ni, ether_sprintf(ni->ni_macaddr),
1567 ieee80211_node_refcnt(ni)+1);
1568 nt->nt_keyixmap[keyix] = ieee80211_ref_node(ni);
1572 if (IS_BCAST_PROBEREQ(wh))
1573 ni = NULL; /* spam bcast probe req to all vap's */
1575 ieee80211_ref_node(ni);
1577 IEEE80211_NODE_UNLOCK(nt);
1581 #undef IS_BCAST_PROBEREQ
1585 * Return a reference to the appropriate node for sending
1586 * a data frame. This handles node discovery in adhoc networks.
1588 struct ieee80211_node *
1589 #ifdef IEEE80211_DEBUG_REFCNT
1590 ieee80211_find_txnode_debug(struct ieee80211vap *vap,
1591 const uint8_t macaddr[IEEE80211_ADDR_LEN],
1592 const char *func, int line)
1594 ieee80211_find_txnode(struct ieee80211vap *vap,
1595 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1598 struct ieee80211_node_table *nt = &vap->iv_ic->ic_sta;
1599 struct ieee80211_node *ni;
1602 * The destination address should be in the node table
1603 * unless this is a multicast/broadcast frame. We can
1604 * also optimize station mode operation, all frames go
1607 /* XXX can't hold lock across dup_bss 'cuz of recursive locking */
1608 IEEE80211_NODE_LOCK(nt);
1609 if (vap->iv_opmode == IEEE80211_M_STA ||
1610 vap->iv_opmode == IEEE80211_M_WDS ||
1611 IEEE80211_IS_MULTICAST(macaddr))
1612 ni = ieee80211_ref_node(vap->iv_bss);
1614 ni = ieee80211_find_node_locked(nt, macaddr);
1615 IEEE80211_NODE_UNLOCK(nt);
1618 if (vap->iv_opmode == IEEE80211_M_IBSS ||
1619 vap->iv_opmode == IEEE80211_M_AHDEMO) {
1621 * In adhoc mode cons up a node for the destination.
1622 * Note that we need an additional reference for the
1623 * caller to be consistent with
1624 * ieee80211_find_node_locked.
1626 ni = ieee80211_fakeup_adhoc_node(vap, macaddr);
1628 (void) ieee80211_ref_node(ni);
1630 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, macaddr,
1631 "no node, discard frame (%s)", __func__);
1632 vap->iv_stats.is_tx_nonode++;
1639 _ieee80211_free_node(struct ieee80211_node *ni)
1641 struct ieee80211_node_table *nt = ni->ni_table;
1644 * NB: careful about referencing the vap as it may be
1645 * gone if the last reference was held by a driver.
1646 * We know the com will always be present so it's safe
1647 * to use ni_ic below to reclaim resources.
1650 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1651 "%s %p<%s> in %s table\n", __func__, ni,
1652 ether_sprintf(ni->ni_macaddr),
1653 nt != NULL ? nt->nt_name : "<gone>");
1655 if (ni->ni_associd != 0) {
1656 struct ieee80211vap *vap = ni->ni_vap;
1657 if (vap->iv_aid_bitmap != NULL)
1658 IEEE80211_AID_CLR(vap, ni->ni_associd);
1661 TAILQ_REMOVE(&nt->nt_node, ni, ni_list);
1662 LIST_REMOVE(ni, ni_hash);
1664 ni->ni_ic->ic_node_free(ni);
1668 #ifdef IEEE80211_DEBUG_REFCNT
1669 ieee80211_free_node_debug(struct ieee80211_node *ni, const char *func, int line)
1671 ieee80211_free_node(struct ieee80211_node *ni)
1674 struct ieee80211_node_table *nt = ni->ni_table;
1676 #ifdef IEEE80211_DEBUG_REFCNT
1677 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1678 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni,
1679 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1);
1682 IEEE80211_NODE_LOCK(nt);
1683 if (ieee80211_node_dectestref(ni)) {
1685 * Last reference, reclaim state.
1687 _ieee80211_free_node(ni);
1688 } else if (ieee80211_node_refcnt(ni) == 1 &&
1689 nt->nt_keyixmap != NULL) {
1690 ieee80211_keyix keyix;
1692 * Check for a last reference in the key mapping table.
1694 keyix = ni->ni_ucastkey.wk_rxkeyix;
1695 if (keyix < nt->nt_keyixmax &&
1696 nt->nt_keyixmap[keyix] == ni) {
1697 IEEE80211_DPRINTF(ni->ni_vap,
1699 "%s: %p<%s> clear key map entry", __func__,
1700 ni, ether_sprintf(ni->ni_macaddr));
1701 nt->nt_keyixmap[keyix] = NULL;
1702 ieee80211_node_decref(ni); /* XXX needed? */
1703 _ieee80211_free_node(ni);
1706 IEEE80211_NODE_UNLOCK(nt);
1708 if (ieee80211_node_dectestref(ni))
1709 _ieee80211_free_node(ni);
1714 * Reclaim a unicast key and clear any key cache state.
1717 ieee80211_node_delucastkey(struct ieee80211_node *ni)
1719 struct ieee80211com *ic = ni->ni_ic;
1720 struct ieee80211_node_table *nt = &ic->ic_sta;
1721 struct ieee80211_node *nikey;
1722 ieee80211_keyix keyix;
1723 int isowned, status;
1726 * NB: We must beware of LOR here; deleting the key
1727 * can cause the crypto layer to block traffic updates
1728 * which can generate a LOR against the node table lock;
1729 * grab it here and stash the key index for our use below.
1731 * Must also beware of recursion on the node table lock.
1732 * When called from node_cleanup we may already have
1733 * the node table lock held. Unfortunately there's no
1734 * way to separate out this path so we must do this
1737 isowned = IEEE80211_NODE_IS_LOCKED(nt);
1739 IEEE80211_NODE_LOCK(nt);
1741 status = 1; /* NB: success */
1742 if (ni->ni_ucastkey.wk_keyix != IEEE80211_KEYIX_NONE) {
1743 keyix = ni->ni_ucastkey.wk_rxkeyix;
1744 status = ieee80211_crypto_delkey(ni->ni_vap, &ni->ni_ucastkey);
1745 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) {
1746 nikey = nt->nt_keyixmap[keyix];
1747 nt->nt_keyixmap[keyix] = NULL;
1751 IEEE80211_NODE_UNLOCK(nt);
1753 if (nikey != NULL) {
1754 KASSERT(nikey == ni,
1755 ("key map out of sync, ni %p nikey %p", ni, nikey));
1756 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1757 "%s: delete key map entry %p<%s> refcnt %d\n",
1758 __func__, ni, ether_sprintf(ni->ni_macaddr),
1759 ieee80211_node_refcnt(ni)-1);
1760 ieee80211_free_node(ni);
1766 * Reclaim a node. If this is the last reference count then
1767 * do the normal free work. Otherwise remove it from the node
1768 * table and mark it gone by clearing the back-reference.
1771 node_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni)
1773 ieee80211_keyix keyix;
1775 IEEE80211_NODE_LOCK_ASSERT(nt);
1777 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1778 "%s: remove %p<%s> from %s table, refcnt %d\n",
1779 __func__, ni, ether_sprintf(ni->ni_macaddr),
1780 nt->nt_name, ieee80211_node_refcnt(ni)-1);
1782 * Clear any entry in the unicast key mapping table.
1783 * We need to do it here so rx lookups don't find it
1784 * in the mapping table even if it's not in the hash
1785 * table. We cannot depend on the mapping table entry
1786 * being cleared because the node may not be free'd.
1788 keyix = ni->ni_ucastkey.wk_rxkeyix;
1789 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax &&
1790 nt->nt_keyixmap[keyix] == ni) {
1791 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1792 "%s: %p<%s> clear key map entry %u\n",
1793 __func__, ni, ether_sprintf(ni->ni_macaddr), keyix);
1794 nt->nt_keyixmap[keyix] = NULL;
1795 ieee80211_node_decref(ni); /* NB: don't need free */
1797 if (!ieee80211_node_dectestref(ni)) {
1799 * Other references are present, just remove the
1800 * node from the table so it cannot be found. When
1801 * the references are dropped storage will be
1804 TAILQ_REMOVE(&nt->nt_node, ni, ni_list);
1805 LIST_REMOVE(ni, ni_hash);
1806 ni->ni_table = NULL; /* clear reference */
1808 _ieee80211_free_node(ni);
1812 * Node table support.
1816 ieee80211_node_table_init(struct ieee80211com *ic,
1817 struct ieee80211_node_table *nt,
1818 const char *name, int inact, int keyixmax)
1820 struct ifnet *ifp = ic->ic_ifp;
1823 IEEE80211_NODE_LOCK_INIT(nt, ifp->if_xname);
1824 IEEE80211_NODE_ITERATE_LOCK_INIT(nt, ifp->if_xname);
1825 TAILQ_INIT(&nt->nt_node);
1828 nt->nt_inact_init = inact;
1829 nt->nt_keyixmax = keyixmax;
1830 if (nt->nt_keyixmax > 0) {
1831 nt->nt_keyixmap = (struct ieee80211_node **) malloc(
1832 keyixmax * sizeof(struct ieee80211_node *),
1833 M_80211_NODE, M_NOWAIT | M_ZERO);
1834 if (nt->nt_keyixmap == NULL)
1835 if_printf(ic->ic_ifp,
1836 "Cannot allocate key index map with %u entries\n",
1839 nt->nt_keyixmap = NULL;
1843 ieee80211_node_table_reset(struct ieee80211_node_table *nt,
1844 struct ieee80211vap *match)
1846 struct ieee80211_node *ni, *next;
1848 IEEE80211_NODE_LOCK(nt);
1849 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) {
1850 if (match != NULL && ni->ni_vap != match)
1852 /* XXX can this happen? if so need's work */
1853 if (ni->ni_associd != 0) {
1854 struct ieee80211vap *vap = ni->ni_vap;
1856 if (vap->iv_auth->ia_node_leave != NULL)
1857 vap->iv_auth->ia_node_leave(ni);
1858 if (vap->iv_aid_bitmap != NULL)
1859 IEEE80211_AID_CLR(vap, ni->ni_associd);
1861 ni->ni_wdsvap = NULL; /* clear reference */
1862 node_reclaim(nt, ni);
1864 if (match != NULL && match->iv_opmode == IEEE80211_M_WDS) {
1866 * Make a separate pass to clear references to this vap
1867 * held by DWDS entries. They will not be matched above
1868 * because ni_vap will point to the ap vap but we still
1869 * need to clear ni_wdsvap when the WDS vap is destroyed
1872 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next)
1873 if (ni->ni_wdsvap == match)
1874 ni->ni_wdsvap = NULL;
1876 IEEE80211_NODE_UNLOCK(nt);
1880 ieee80211_node_table_cleanup(struct ieee80211_node_table *nt)
1882 ieee80211_node_table_reset(nt, NULL);
1883 if (nt->nt_keyixmap != NULL) {
1885 /* XXX verify all entries are NULL */
1887 for (i = 0; i < nt->nt_keyixmax; i++)
1888 if (nt->nt_keyixmap[i] != NULL)
1889 printf("%s: %s[%u] still active\n", __func__,
1892 free(nt->nt_keyixmap, M_80211_NODE);
1893 nt->nt_keyixmap = NULL;
1895 IEEE80211_NODE_ITERATE_LOCK_DESTROY(nt);
1896 IEEE80211_NODE_LOCK_DESTROY(nt);
1900 * Timeout inactive stations and do related housekeeping.
1901 * Note that we cannot hold the node lock while sending a
1902 * frame as this would lead to a LOR. Instead we use a
1903 * generation number to mark nodes that we've scanned and
1904 * drop the lock and restart a scan if we have to time out
1905 * a node. Since we are single-threaded by virtue of
1906 * controlling the inactivity timer we can be sure this will
1907 * process each node only once.
1910 ieee80211_timeout_stations(struct ieee80211com *ic)
1912 struct ieee80211_node_table *nt = &ic->ic_sta;
1913 struct ieee80211vap *vap;
1914 struct ieee80211_node *ni;
1917 IEEE80211_NODE_ITERATE_LOCK(nt);
1918 gen = ++nt->nt_scangen;
1920 IEEE80211_NODE_LOCK(nt);
1921 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) {
1922 if (ni->ni_scangen == gen) /* previously handled */
1924 ni->ni_scangen = gen;
1926 * Ignore entries for which have yet to receive an
1927 * authentication frame. These are transient and
1928 * will be reclaimed when the last reference to them
1929 * goes away (when frame xmits complete).
1933 * Only process stations when in RUN state. This
1934 * insures, for example, that we don't timeout an
1935 * inactive station during CAC. Note that CSA state
1936 * is actually handled in ieee80211_node_timeout as
1937 * it applies to more than timeout processing.
1939 if (vap->iv_state != IEEE80211_S_RUN)
1941 /* XXX can vap be NULL? */
1942 if ((vap->iv_opmode == IEEE80211_M_HOSTAP ||
1943 vap->iv_opmode == IEEE80211_M_STA) &&
1944 (ni->ni_flags & IEEE80211_NODE_AREF) == 0)
1947 * Free fragment if not needed anymore
1948 * (last fragment older than 1s).
1949 * XXX doesn't belong here, move to node_age
1951 if (ni->ni_rxfrag[0] != NULL &&
1952 ticks > ni->ni_rxfragstamp + hz) {
1953 m_freem(ni->ni_rxfrag[0]);
1954 ni->ni_rxfrag[0] = NULL;
1956 if (ni->ni_inact > 0) {
1958 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni,
1959 "%s: inact %u inact_reload %u nrates %u",
1960 __func__, ni->ni_inact, ni->ni_inact_reload,
1961 ni->ni_rates.rs_nrates);
1964 * Special case ourself; we may be idle for extended periods
1965 * of time and regardless reclaiming our state is wrong.
1966 * XXX run ic_node_age
1968 if (ni == vap->iv_bss)
1970 if (ni->ni_associd != 0 ||
1971 (vap->iv_opmode == IEEE80211_M_IBSS ||
1972 vap->iv_opmode == IEEE80211_M_AHDEMO)) {
1974 * Age/drain resources held by the station.
1976 ic->ic_node_age(ni);
1978 * Probe the station before time it out. We
1979 * send a null data frame which may not be
1980 * universally supported by drivers (need it
1981 * for ps-poll support so it should be...).
1983 * XXX don't probe the station unless we've
1984 * received a frame from them (and have
1985 * some idea of the rates they are capable
1986 * of); this will get fixed more properly
1987 * soon with better handling of the rate set.
1989 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) &&
1990 (0 < ni->ni_inact &&
1991 ni->ni_inact <= vap->iv_inact_probe) &&
1992 ni->ni_rates.rs_nrates != 0) {
1994 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE,
1996 "probe station due to inactivity");
1998 * Grab a reference before unlocking the table
1999 * so the node cannot be reclaimed before we
2000 * send the frame. ieee80211_send_nulldata
2001 * understands we've done this and reclaims the
2002 * ref for us as needed.
2004 ieee80211_ref_node(ni);
2005 IEEE80211_NODE_UNLOCK(nt);
2006 ieee80211_send_nulldata(ni);
2011 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) &&
2012 ni->ni_inact <= 0) {
2014 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, ni,
2015 "station timed out due to inactivity "
2016 "(refcnt %u)", ieee80211_node_refcnt(ni));
2018 * Send a deauthenticate frame and drop the station.
2019 * This is somewhat complicated due to reference counts
2020 * and locking. At this point a station will typically
2021 * have a reference count of 1. ieee80211_node_leave
2022 * will do a "free" of the node which will drop the
2023 * reference count. But in the meantime a reference
2024 * wil be held by the deauth frame. The actual reclaim
2025 * of the node will happen either after the tx is
2026 * completed or by ieee80211_node_leave.
2028 * Separately we must drop the node lock before sending
2029 * in case the driver takes a lock, as this can result
2030 * in a LOR between the node lock and the driver lock.
2032 ieee80211_ref_node(ni);
2033 IEEE80211_NODE_UNLOCK(nt);
2034 if (ni->ni_associd != 0) {
2035 IEEE80211_SEND_MGMT(ni,
2036 IEEE80211_FC0_SUBTYPE_DEAUTH,
2037 IEEE80211_REASON_AUTH_EXPIRE);
2039 ieee80211_node_leave(ni);
2040 ieee80211_free_node(ni);
2041 vap->iv_stats.is_node_timeout++;
2045 IEEE80211_NODE_UNLOCK(nt);
2047 IEEE80211_NODE_ITERATE_UNLOCK(nt);
2051 * Aggressively reclaim resources. This should be used
2052 * only in a critical situation to reclaim mbuf resources.
2055 ieee80211_drain(struct ieee80211com *ic)
2057 struct ieee80211_node_table *nt = &ic->ic_sta;
2058 struct ieee80211vap *vap;
2059 struct ieee80211_node *ni;
2061 IEEE80211_NODE_LOCK(nt);
2062 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) {
2064 * Ignore entries for which have yet to receive an
2065 * authentication frame. These are transient and
2066 * will be reclaimed when the last reference to them
2067 * goes away (when frame xmits complete).
2071 * Only process stations when in RUN state. This
2072 * insures, for example, that we don't timeout an
2073 * inactive station during CAC. Note that CSA state
2074 * is actually handled in ieee80211_node_timeout as
2075 * it applies to more than timeout processing.
2077 if (vap->iv_state != IEEE80211_S_RUN)
2079 /* XXX can vap be NULL? */
2080 if ((vap->iv_opmode == IEEE80211_M_HOSTAP ||
2081 vap->iv_opmode == IEEE80211_M_STA) &&
2082 (ni->ni_flags & IEEE80211_NODE_AREF) == 0)
2086 * XXX doesn't belong here, move to node_drain
2088 if (ni->ni_rxfrag[0] != NULL) {
2089 m_freem(ni->ni_rxfrag[0]);
2090 ni->ni_rxfrag[0] = NULL;
2093 * Drain resources held by the station.
2095 ic->ic_node_drain(ni);
2097 IEEE80211_NODE_UNLOCK(nt);
2101 * Per-ieee80211com inactivity timer callback.
2104 ieee80211_node_timeout(void *arg)
2106 struct ieee80211com *ic = arg;
2109 * Defer timeout processing if a channel switch is pending.
2110 * We typically need to be mute so not doing things that
2111 * might generate frames is good to handle in one place.
2112 * Supressing the station timeout processing may extend the
2113 * lifetime of inactive stations (by not decrementing their
2114 * idle counters) but this should be ok unless the CSA is
2115 * active for an unusually long time.
2117 if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) {
2118 ieee80211_scan_timeout(ic);
2119 ieee80211_timeout_stations(ic);
2120 ieee80211_ageq_age(&ic->ic_stageq, IEEE80211_INACT_WAIT);
2123 ieee80211_erp_timeout(ic);
2124 ieee80211_ht_timeout(ic);
2125 IEEE80211_UNLOCK(ic);
2127 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz,
2128 ieee80211_node_timeout, ic);
2132 ieee80211_iterate_nodes(struct ieee80211_node_table *nt,
2133 ieee80211_iter_func *f, void *arg)
2135 struct ieee80211_node *ni;
2138 IEEE80211_NODE_ITERATE_LOCK(nt);
2139 gen = ++nt->nt_scangen;
2141 IEEE80211_NODE_LOCK(nt);
2142 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) {
2143 if (ni->ni_scangen != gen) {
2144 ni->ni_scangen = gen;
2145 (void) ieee80211_ref_node(ni);
2146 IEEE80211_NODE_UNLOCK(nt);
2148 ieee80211_free_node(ni);
2152 IEEE80211_NODE_UNLOCK(nt);
2154 IEEE80211_NODE_ITERATE_UNLOCK(nt);
2158 ieee80211_dump_node(struct ieee80211_node_table *nt, struct ieee80211_node *ni)
2160 printf("0x%p: mac %s refcnt %d\n", ni,
2161 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni));
2162 printf("\tscangen %u authmode %u flags 0x%x\n",
2163 ni->ni_scangen, ni->ni_authmode, ni->ni_flags);
2164 printf("\tassocid 0x%x txpower %u vlan %u\n",
2165 ni->ni_associd, ni->ni_txpower, ni->ni_vlan);
2166 printf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n",
2167 ni->ni_txseqs[IEEE80211_NONQOS_TID],
2168 ni->ni_rxseqs[IEEE80211_NONQOS_TID] >> IEEE80211_SEQ_SEQ_SHIFT,
2169 ni->ni_rxseqs[IEEE80211_NONQOS_TID] & IEEE80211_SEQ_FRAG_MASK,
2170 ni->ni_rxfragstamp);
2171 printf("\trssi %d noise %d intval %u capinfo 0x%x\n",
2172 node_getrssi(ni), ni->ni_noise,
2173 ni->ni_intval, ni->ni_capinfo);
2174 printf("\tbssid %s essid \"%.*s\" channel %u:0x%x\n",
2175 ether_sprintf(ni->ni_bssid),
2176 ni->ni_esslen, ni->ni_essid,
2177 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags);
2178 printf("\tinact %u inact_reload %u txrate %u\n",
2179 ni->ni_inact, ni->ni_inact_reload, ni->ni_txrate);
2180 printf("\thtcap %x htparam %x htctlchan %u ht2ndchan %u\n",
2181 ni->ni_htcap, ni->ni_htparam,
2182 ni->ni_htctlchan, ni->ni_ht2ndchan);
2183 printf("\thtopmode %x htstbc %x chw %u\n",
2184 ni->ni_htopmode, ni->ni_htstbc, ni->ni_chw);
2188 ieee80211_dump_nodes(struct ieee80211_node_table *nt)
2190 ieee80211_iterate_nodes(nt,
2191 (ieee80211_iter_func *) ieee80211_dump_node, nt);
2195 ieee80211_notify_erp_locked(struct ieee80211com *ic)
2197 struct ieee80211vap *vap;
2199 IEEE80211_LOCK_ASSERT(ic);
2201 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
2202 if (vap->iv_opmode == IEEE80211_M_HOSTAP)
2203 ieee80211_beacon_notify(vap, IEEE80211_BEACON_ERP);
2207 ieee80211_notify_erp(struct ieee80211com *ic)
2210 ieee80211_notify_erp_locked(ic);
2211 IEEE80211_UNLOCK(ic);
2215 * Handle a station joining an 11g network.
2218 ieee80211_node_join_11g(struct ieee80211_node *ni)
2220 struct ieee80211com *ic = ni->ni_ic;
2222 IEEE80211_LOCK_ASSERT(ic);
2225 * Station isn't capable of short slot time. Bump
2226 * the count of long slot time stations and disable
2227 * use of short slot time. Note that the actual switch
2228 * over to long slot time use may not occur until the
2229 * next beacon transmission (per sec. 7.3.1.4 of 11g).
2231 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) {
2232 ic->ic_longslotsta++;
2233 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2234 "station needs long slot time, count %d",
2235 ic->ic_longslotsta);
2236 /* XXX vap's w/ conflicting needs won't work */
2237 if (!IEEE80211_IS_CHAN_108G(ic->ic_bsschan)) {
2239 * Don't force slot time when switched to turbo
2240 * mode as non-ERP stations won't be present; this
2241 * need only be done when on the normal G channel.
2243 ieee80211_set_shortslottime(ic, 0);
2247 * If the new station is not an ERP station
2248 * then bump the counter and enable protection
2251 if (!ieee80211_iserp_rateset(&ni->ni_rates)) {
2253 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2254 "station is !ERP, %d non-ERP stations associated",
2257 * If station does not support short preamble
2258 * then we must enable use of Barker preamble.
2260 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) {
2261 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2262 "%s", "station needs long preamble");
2263 ic->ic_flags |= IEEE80211_F_USEBARKER;
2264 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE;
2267 * If protection is configured and this is the first
2268 * indication we should use protection, enable it.
2270 if (ic->ic_protmode != IEEE80211_PROT_NONE &&
2271 ic->ic_nonerpsta == 1 &&
2272 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) {
2273 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC,
2274 "%s: enable use of protection\n", __func__);
2275 ic->ic_flags |= IEEE80211_F_USEPROT;
2276 ieee80211_notify_erp_locked(ic);
2279 ni->ni_flags |= IEEE80211_NODE_ERP;
2283 ieee80211_node_join(struct ieee80211_node *ni, int resp)
2285 struct ieee80211com *ic = ni->ni_ic;
2286 struct ieee80211vap *vap = ni->ni_vap;
2289 if (ni->ni_associd == 0) {
2292 KASSERT(vap->iv_aid_bitmap != NULL, ("no aid bitmap"));
2294 * It would be good to search the bitmap
2295 * more efficiently, but this will do for now.
2297 for (aid = 1; aid < vap->iv_max_aid; aid++) {
2298 if (!IEEE80211_AID_ISSET(vap, aid))
2301 if (aid >= vap->iv_max_aid) {
2302 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_TOOMANY);
2303 ieee80211_node_leave(ni);
2306 ni->ni_associd = aid | 0xc000;
2307 ni->ni_jointime = time_uptime;
2309 IEEE80211_AID_SET(vap, ni->ni_associd);
2310 vap->iv_sta_assoc++;
2313 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan))
2314 ieee80211_ht_node_join(ni);
2315 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) &&
2316 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan))
2317 ieee80211_node_join_11g(ni);
2318 IEEE80211_UNLOCK(ic);
2324 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni,
2325 "station associated at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s",
2326 IEEE80211_NODE_AID(ni),
2327 ic->ic_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long",
2328 ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long",
2329 ic->ic_flags & IEEE80211_F_USEPROT ? ", protection" : "",
2330 ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "",
2331 ni->ni_flags & IEEE80211_NODE_HT ?
2332 (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "",
2333 ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "",
2334 ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" :
2335 ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "",
2336 ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "",
2337 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ?
2338 ", fast-frames" : "",
2339 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ?
2343 ieee80211_node_setuptxparms(ni);
2344 ieee80211_ratectl_node_init(ni);
2345 /* give driver a chance to setup state like ni_txrate */
2346 if (ic->ic_newassoc != NULL)
2347 ic->ic_newassoc(ni, newassoc);
2348 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_SUCCESS);
2349 /* tell the authenticator about new station */
2350 if (vap->iv_auth->ia_node_join != NULL)
2351 vap->iv_auth->ia_node_join(ni);
2352 ieee80211_notify_node_join(ni,
2353 resp == IEEE80211_FC0_SUBTYPE_ASSOC_RESP);
2357 disable_protection(struct ieee80211com *ic)
2359 KASSERT(ic->ic_nonerpsta == 0 &&
2360 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0,
2361 ("%d non ERP stations, flags 0x%x", ic->ic_nonerpsta,
2364 ic->ic_flags &= ~IEEE80211_F_USEPROT;
2365 /* XXX verify mode? */
2366 if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) {
2367 ic->ic_flags |= IEEE80211_F_SHPREAMBLE;
2368 ic->ic_flags &= ~IEEE80211_F_USEBARKER;
2370 ieee80211_notify_erp_locked(ic);
2374 * Handle a station leaving an 11g network.
2377 ieee80211_node_leave_11g(struct ieee80211_node *ni)
2379 struct ieee80211com *ic = ni->ni_ic;
2381 IEEE80211_LOCK_ASSERT(ic);
2383 KASSERT(IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan),
2384 ("not in 11g, bss %u:0x%x", ic->ic_bsschan->ic_freq,
2385 ic->ic_bsschan->ic_flags));
2388 * If a long slot station do the slot time bookkeeping.
2390 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) {
2391 KASSERT(ic->ic_longslotsta > 0,
2392 ("bogus long slot station count %d", ic->ic_longslotsta));
2393 ic->ic_longslotsta--;
2394 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2395 "long slot time station leaves, count now %d",
2396 ic->ic_longslotsta);
2397 if (ic->ic_longslotsta == 0) {
2399 * Re-enable use of short slot time if supported
2400 * and not operating in IBSS mode (per spec).
2402 if ((ic->ic_caps & IEEE80211_C_SHSLOT) &&
2403 ic->ic_opmode != IEEE80211_M_IBSS) {
2404 IEEE80211_DPRINTF(ni->ni_vap,
2405 IEEE80211_MSG_ASSOC,
2406 "%s: re-enable use of short slot time\n",
2408 ieee80211_set_shortslottime(ic, 1);
2413 * If a non-ERP station do the protection-related bookkeeping.
2415 if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) {
2416 KASSERT(ic->ic_nonerpsta > 0,
2417 ("bogus non-ERP station count %d", ic->ic_nonerpsta));
2419 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2420 "non-ERP station leaves, count now %d%s", ic->ic_nonerpsta,
2421 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) ?
2422 " (non-ERP sta present)" : "");
2423 if (ic->ic_nonerpsta == 0 &&
2424 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) {
2425 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC,
2426 "%s: disable use of protection\n", __func__);
2427 disable_protection(ic);
2433 * Time out presence of an overlapping bss with non-ERP
2434 * stations. When operating in hostap mode we listen for
2435 * beacons from other stations and if we identify a non-ERP
2436 * station is present we enable protection. To identify
2437 * when all non-ERP stations are gone we time out this
2441 ieee80211_erp_timeout(struct ieee80211com *ic)
2444 IEEE80211_LOCK_ASSERT(ic);
2446 if ((ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) &&
2447 time_after(ticks, ic->ic_lastnonerp + IEEE80211_NONERP_PRESENT_AGE)) {
2449 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni,
2450 "%s", "age out non-ERP sta present on channel");
2452 ic->ic_flags_ext &= ~IEEE80211_FEXT_NONERP_PR;
2453 if (ic->ic_nonerpsta == 0)
2454 disable_protection(ic);
2459 * Handle bookkeeping for station deauthentication/disassociation
2460 * when operating as an ap.
2463 ieee80211_node_leave(struct ieee80211_node *ni)
2465 struct ieee80211com *ic = ni->ni_ic;
2466 struct ieee80211vap *vap = ni->ni_vap;
2467 struct ieee80211_node_table *nt = ni->ni_table;
2469 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni,
2470 "station with aid %d leaves", IEEE80211_NODE_AID(ni));
2472 KASSERT(vap->iv_opmode != IEEE80211_M_STA,
2473 ("unexpected operating mode %u", vap->iv_opmode));
2475 * If node wasn't previously associated all
2476 * we need to do is reclaim the reference.
2478 /* XXX ibss mode bypasses 11g and notification */
2479 if (ni->ni_associd == 0)
2482 * Tell the authenticator the station is leaving.
2483 * Note that we must do this before yanking the
2484 * association id as the authenticator uses the
2485 * associd to locate it's state block.
2487 if (vap->iv_auth->ia_node_leave != NULL)
2488 vap->iv_auth->ia_node_leave(ni);
2491 IEEE80211_AID_CLR(vap, ni->ni_associd);
2493 vap->iv_sta_assoc--;
2496 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan))
2497 ieee80211_ht_node_leave(ni);
2498 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) &&
2499 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan))
2500 ieee80211_node_leave_11g(ni);
2501 IEEE80211_UNLOCK(ic);
2503 * Cleanup station state. In particular clear various
2504 * state that might otherwise be reused if the node
2505 * is reused before the reference count goes to zero
2506 * (and memory is reclaimed).
2508 ieee80211_sta_leave(ni);
2511 * Remove the node from any table it's recorded in and
2512 * drop the caller's reference. Removal from the table
2513 * is important to insure the node is not reprocessed
2517 IEEE80211_NODE_LOCK(nt);
2518 node_reclaim(nt, ni);
2519 IEEE80211_NODE_UNLOCK(nt);
2521 ieee80211_free_node(ni);
2525 struct ieee80211vap *vap;
2527 uint32_t rssi_total;
2531 get_hostap_rssi(void *arg, struct ieee80211_node *ni)
2533 struct rssiinfo *info = arg;
2534 struct ieee80211vap *vap = ni->ni_vap;
2537 if (info->vap != vap)
2539 /* only associated stations */
2540 if (ni->ni_associd == 0)
2542 rssi = vap->iv_ic->ic_node_getrssi(ni);
2544 info->rssi_samples++;
2545 info->rssi_total += rssi;
2550 get_adhoc_rssi(void *arg, struct ieee80211_node *ni)
2552 struct rssiinfo *info = arg;
2553 struct ieee80211vap *vap = ni->ni_vap;
2556 if (info->vap != vap)
2558 /* only neighbors */
2559 /* XXX check bssid */
2560 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0)
2562 rssi = vap->iv_ic->ic_node_getrssi(ni);
2564 info->rssi_samples++;
2565 info->rssi_total += rssi;
2569 #ifdef IEEE80211_SUPPORT_MESH
2571 get_mesh_rssi(void *arg, struct ieee80211_node *ni)
2573 struct rssiinfo *info = arg;
2574 struct ieee80211vap *vap = ni->ni_vap;
2577 if (info->vap != vap)
2579 /* only neighbors that peered successfully */
2580 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED)
2582 rssi = vap->iv_ic->ic_node_getrssi(ni);
2584 info->rssi_samples++;
2585 info->rssi_total += rssi;
2588 #endif /* IEEE80211_SUPPORT_MESH */
2591 ieee80211_getrssi(struct ieee80211vap *vap)
2593 #define NZ(x) ((x) == 0 ? 1 : (x))
2594 struct ieee80211com *ic = vap->iv_ic;
2595 struct rssiinfo info;
2597 info.rssi_total = 0;
2598 info.rssi_samples = 0;
2600 switch (vap->iv_opmode) {
2601 case IEEE80211_M_IBSS: /* average of all ibss neighbors */
2602 case IEEE80211_M_AHDEMO: /* average of all neighbors */
2603 ieee80211_iterate_nodes(&ic->ic_sta, get_adhoc_rssi, &info);
2605 case IEEE80211_M_HOSTAP: /* average of all associated stations */
2606 ieee80211_iterate_nodes(&ic->ic_sta, get_hostap_rssi, &info);
2608 #ifdef IEEE80211_SUPPORT_MESH
2609 case IEEE80211_M_MBSS: /* average of all mesh neighbors */
2610 ieee80211_iterate_nodes(&ic->ic_sta, get_mesh_rssi, &info);
2613 case IEEE80211_M_MONITOR: /* XXX */
2614 case IEEE80211_M_STA: /* use stats from associated ap */
2616 if (vap->iv_bss != NULL)
2617 info.rssi_total = ic->ic_node_getrssi(vap->iv_bss);
2618 info.rssi_samples = 1;
2621 return info.rssi_total / NZ(info.rssi_samples);
2626 ieee80211_getsignal(struct ieee80211vap *vap, int8_t *rssi, int8_t *noise)
2629 if (vap->iv_bss == NULL) /* NB: shouldn't happen */
2631 vap->iv_ic->ic_node_getsignal(vap->iv_bss, rssi, noise);
2632 /* for non-station mode return avg'd rssi accounting */
2633 if (vap->iv_opmode != IEEE80211_M_STA)
2634 *rssi = ieee80211_getrssi(vap);