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.
26 * $FreeBSD: head/sys/net80211/ieee80211_node.c 206358 2010-04-07 15:29:13Z rpaulo $
31 #include <sys/param.h>
32 #include <sys/systm.h>
34 #include <sys/malloc.h>
35 #include <sys/kernel.h>
37 #include <sys/socket.h>
40 #include <net/if_media.h>
41 #include <net/ethernet.h>
42 #include <net/route.h>
44 #include <netproto/802_11/ieee80211_var.h>
45 #include <netproto/802_11/ieee80211_input.h>
46 #ifdef IEEE80211_SUPPORT_SUPERG
47 #include <netproto/802_11/ieee80211_superg.h>
49 #ifdef IEEE80211_SUPPORT_TDMA
50 #include <netproto/802_11/ieee80211_tdma.h>
52 #include <netproto/802_11/ieee80211_wds.h>
53 #include <netproto/802_11/ieee80211_mesh.h>
54 #include <netproto/802_11/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 *);
92 static void ieee80211_node_timeout_callout(void *arg);
94 static void _ieee80211_free_node(struct ieee80211_node *);
96 static void ieee80211_node_table_init(struct ieee80211com *ic,
97 struct ieee80211_node_table *nt, const char *name,
98 int inact, int keymaxix);
99 static void ieee80211_node_table_reset(struct ieee80211_node_table *,
100 struct ieee80211vap *);
101 static void ieee80211_node_table_cleanup(struct ieee80211_node_table *nt);
102 static void ieee80211_erp_timeout(struct ieee80211com *);
104 MALLOC_DEFINE(M_80211_NODE, "80211node", "802.11 node state");
105 MALLOC_DEFINE(M_80211_NODE_IE, "80211nodeie", "802.11 node ie");
108 ieee80211_node_attach(struct ieee80211com *ic)
110 /* XXX really want maxlen enforced per-sta */
111 ieee80211_ageq_init(&ic->ic_stageq, ic->ic_max_keyix * 8,
113 ieee80211_node_table_init(ic, &ic->ic_sta, "station",
114 IEEE80211_INACT_INIT, ic->ic_max_keyix);
115 callout_init_mp(&ic->ic_inact);
116 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz,
117 ieee80211_node_timeout_callout, ic);
119 ic->ic_node_alloc = node_alloc;
120 ic->ic_node_free = node_free;
121 ic->ic_node_cleanup = node_cleanup;
122 ic->ic_node_age = node_age;
123 ic->ic_node_drain = node_age; /* NB: same as age */
124 ic->ic_node_getrssi = node_getrssi;
125 ic->ic_node_getsignal = node_getsignal;
126 ic->ic_node_getmimoinfo = node_getmimoinfo;
129 * Set flags to be propagated to all vap's;
130 * these define default behaviour/configuration.
132 ic->ic_flags_ext |= IEEE80211_FEXT_INACT; /* inactivity processing */
136 ieee80211_node_detach(struct ieee80211com *ic)
139 callout_stop(&ic->ic_inact);
140 ieee80211_node_table_cleanup(&ic->ic_sta);
141 ieee80211_ageq_cleanup(&ic->ic_stageq);
145 ieee80211_node_vattach(struct ieee80211vap *vap)
147 /* NB: driver can override */
148 vap->iv_max_aid = IEEE80211_AID_DEF;
150 /* default station inactivity timer setings */
151 vap->iv_inact_init = IEEE80211_INACT_INIT;
152 vap->iv_inact_auth = IEEE80211_INACT_AUTH;
153 vap->iv_inact_run = IEEE80211_INACT_RUN;
154 vap->iv_inact_probe = IEEE80211_INACT_PROBE;
156 IEEE80211_DPRINTF(vap, IEEE80211_MSG_INACT,
157 "%s: init %u auth %u run %u probe %u\n", __func__,
158 vap->iv_inact_init, vap->iv_inact_auth,
159 vap->iv_inact_run, vap->iv_inact_probe);
163 ieee80211_node_latevattach(struct ieee80211vap *vap)
165 if (vap->iv_opmode == IEEE80211_M_HOSTAP) {
166 /* XXX should we allow max aid to be zero? */
167 if (vap->iv_max_aid < IEEE80211_AID_MIN) {
168 vap->iv_max_aid = IEEE80211_AID_MIN;
169 if_printf(vap->iv_ifp,
170 "WARNING: max aid too small, changed to %d\n",
173 vap->iv_aid_bitmap = (uint32_t *) kmalloc(
174 howmany(vap->iv_max_aid, 32) * sizeof(uint32_t),
175 M_80211_NODE, M_INTWAIT | M_ZERO);
176 if (vap->iv_aid_bitmap == NULL) {
177 /* XXX no way to recover */
178 kprintf("%s: no memory for AID bitmap, max aid %d!\n",
179 __func__, vap->iv_max_aid);
184 ieee80211_reset_bss(vap);
186 vap->iv_auth = ieee80211_authenticator_get(vap->iv_bss->ni_authmode);
190 ieee80211_node_vdetach(struct ieee80211vap *vap)
192 struct ieee80211com *ic = vap->iv_ic;
194 ieee80211_node_table_reset(&ic->ic_sta, vap);
195 if (vap->iv_bss != NULL) {
196 ieee80211_free_node(vap->iv_bss);
199 if (vap->iv_aid_bitmap != NULL) {
200 kfree(vap->iv_aid_bitmap, M_80211_NODE);
201 vap->iv_aid_bitmap = NULL;
206 * Port authorize/unauthorize interfaces for use by an authenticator.
210 ieee80211_node_authorize(struct ieee80211_node *ni)
212 struct ieee80211vap *vap = ni->ni_vap;
214 ni->ni_flags |= IEEE80211_NODE_AUTH;
215 ni->ni_inact_reload = vap->iv_inact_run;
216 ni->ni_inact = ni->ni_inact_reload;
218 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni,
219 "%s: inact_reload %u", __func__, ni->ni_inact_reload);
223 ieee80211_node_unauthorize(struct ieee80211_node *ni)
225 struct ieee80211vap *vap = ni->ni_vap;
227 ni->ni_flags &= ~IEEE80211_NODE_AUTH;
228 ni->ni_inact_reload = vap->iv_inact_auth;
229 if (ni->ni_inact > ni->ni_inact_reload)
230 ni->ni_inact = ni->ni_inact_reload;
232 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni,
233 "%s: inact_reload %u inact %u", __func__,
234 ni->ni_inact_reload, ni->ni_inact);
238 * Fix tx parameters for a node according to ``association state''.
241 ieee80211_node_setuptxparms(struct ieee80211_node *ni)
243 struct ieee80211vap *vap = ni->ni_vap;
244 enum ieee80211_phymode mode;
246 if (ni->ni_flags & IEEE80211_NODE_HT) {
247 if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan))
248 mode = IEEE80211_MODE_11NA;
250 mode = IEEE80211_MODE_11NG;
251 } else { /* legacy rate handling */
252 if (IEEE80211_IS_CHAN_ST(ni->ni_chan))
253 mode = IEEE80211_MODE_STURBO_A;
254 else if (IEEE80211_IS_CHAN_HALF(ni->ni_chan))
255 mode = IEEE80211_MODE_HALF;
256 else if (IEEE80211_IS_CHAN_QUARTER(ni->ni_chan))
257 mode = IEEE80211_MODE_QUARTER;
258 /* NB: 108A should be handled as 11a */
259 else if (IEEE80211_IS_CHAN_A(ni->ni_chan))
260 mode = IEEE80211_MODE_11A;
261 else if (IEEE80211_IS_CHAN_108G(ni->ni_chan) ||
262 (ni->ni_flags & IEEE80211_NODE_ERP))
263 mode = IEEE80211_MODE_11G;
265 mode = IEEE80211_MODE_11B;
267 ni->ni_txparms = &vap->iv_txparms[mode];
271 * Set/change the channel. The rate set is also updated as
272 * to insure a consistent view by drivers.
273 * XXX should be private but hostap needs it to deal with CSA
276 ieee80211_node_set_chan(struct ieee80211_node *ni,
277 struct ieee80211_channel *chan)
279 struct ieee80211com *ic = ni->ni_ic;
280 struct ieee80211vap *vap = ni->ni_vap;
281 enum ieee80211_phymode mode;
283 KASSERT(chan != IEEE80211_CHAN_ANYC, ("no channel"));
286 mode = ieee80211_chan2mode(chan);
287 if (IEEE80211_IS_CHAN_HT(chan)) {
289 * XXX Gotta be careful here; the rate set returned by
290 * ieee80211_get_suprates is actually any HT rate
291 * set so blindly copying it will be bad. We must
292 * install the legacy rate est in ni_rates and the
293 * HT rate set in ni_htrates.
295 ni->ni_htrates = *ieee80211_get_suphtrates(ic, chan);
297 * Setup bss tx parameters based on operating mode. We
298 * use legacy rates when operating in a mixed HT+non-HT bss
299 * and non-ERP rates in 11g for mixed ERP+non-ERP bss.
301 if (mode == IEEE80211_MODE_11NA &&
302 (vap->iv_flags_ht & IEEE80211_FHT_PUREN) == 0)
303 mode = IEEE80211_MODE_11A;
304 else if (mode == IEEE80211_MODE_11NG &&
305 (vap->iv_flags_ht & IEEE80211_FHT_PUREN) == 0)
306 mode = IEEE80211_MODE_11G;
307 if (mode == IEEE80211_MODE_11G &&
308 (vap->iv_flags & IEEE80211_F_PUREG) == 0)
309 mode = IEEE80211_MODE_11B;
311 ni->ni_txparms = &vap->iv_txparms[mode];
312 ni->ni_rates = *ieee80211_get_suprates(ic, chan);
316 copy_bss(struct ieee80211_node *nbss, const struct ieee80211_node *obss)
318 /* propagate useful state */
319 nbss->ni_authmode = obss->ni_authmode;
320 nbss->ni_txpower = obss->ni_txpower;
321 nbss->ni_vlan = obss->ni_vlan;
322 /* XXX statistics? */
323 /* XXX legacy WDS bssid? */
327 ieee80211_create_ibss(struct ieee80211vap* vap, struct ieee80211_channel *chan)
329 struct ieee80211com *ic = vap->iv_ic;
330 struct ieee80211_node *ni;
332 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN,
333 "%s: creating %s on channel %u\n", __func__,
334 ieee80211_opmode_name[vap->iv_opmode],
335 ieee80211_chan2ieee(ic, chan));
337 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr);
342 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr);
343 ni->ni_esslen = vap->iv_des_ssid[0].len;
344 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen);
345 if (vap->iv_bss != NULL)
346 copy_bss(ni, vap->iv_bss);
347 ni->ni_intval = ic->ic_bintval;
348 if (vap->iv_flags & IEEE80211_F_PRIVACY)
349 ni->ni_capinfo |= IEEE80211_CAPINFO_PRIVACY;
350 if (ic->ic_phytype == IEEE80211_T_FH) {
351 ni->ni_fhdwell = 200; /* XXX */
354 if (vap->iv_opmode == IEEE80211_M_IBSS) {
355 vap->iv_flags |= IEEE80211_F_SIBSS;
356 ni->ni_capinfo |= IEEE80211_CAPINFO_IBSS; /* XXX */
357 if (vap->iv_flags & IEEE80211_F_DESBSSID)
358 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid);
360 get_random_bytes(ni->ni_bssid, IEEE80211_ADDR_LEN);
361 /* clear group bit, add local bit */
362 ni->ni_bssid[0] = (ni->ni_bssid[0] &~ 0x01) | 0x02;
364 } else if (vap->iv_opmode == IEEE80211_M_AHDEMO) {
365 if (vap->iv_flags & IEEE80211_F_DESBSSID)
366 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid);
368 #ifdef IEEE80211_SUPPORT_TDMA
369 if ((vap->iv_caps & IEEE80211_C_TDMA) == 0)
371 memset(ni->ni_bssid, 0, IEEE80211_ADDR_LEN);
372 #ifdef IEEE80211_SUPPORT_MESH
373 } else if (vap->iv_opmode == IEEE80211_M_MBSS) {
374 ni->ni_meshidlen = vap->iv_mesh->ms_idlen;
375 memcpy(ni->ni_meshid, vap->iv_mesh->ms_id, ni->ni_meshidlen);
379 * Fix the channel and related attributes.
381 /* clear DFS CAC state on previous channel */
382 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC &&
383 ic->ic_bsschan->ic_freq != chan->ic_freq &&
384 IEEE80211_IS_CHAN_CACDONE(ic->ic_bsschan))
385 ieee80211_dfs_cac_clear(ic, ic->ic_bsschan);
386 ic->ic_bsschan = chan;
387 ieee80211_node_set_chan(ni, chan);
388 ic->ic_curmode = ieee80211_chan2mode(chan);
390 * Do mode-specific setup.
392 if (IEEE80211_IS_CHAN_FULL(chan)) {
393 if (IEEE80211_IS_CHAN_ANYG(chan)) {
395 * Use a mixed 11b/11g basic rate set.
397 ieee80211_setbasicrates(&ni->ni_rates,
399 if (vap->iv_flags & IEEE80211_F_PUREG) {
401 * Also mark OFDM rates basic so 11b
402 * stations do not join (WiFi compliance).
404 ieee80211_addbasicrates(&ni->ni_rates,
407 } else if (IEEE80211_IS_CHAN_B(chan)) {
409 * Force pure 11b rate set.
411 ieee80211_setbasicrates(&ni->ni_rates,
416 (void) ieee80211_sta_join1(ieee80211_ref_node(ni));
420 * Reset bss state on transition to the INIT state.
421 * Clear any stations from the table (they have been
422 * deauth'd) and reset the bss node (clears key, rate
426 ieee80211_reset_bss(struct ieee80211vap *vap)
428 struct ieee80211com *ic = vap->iv_ic;
429 struct ieee80211_node *ni, *obss;
431 ieee80211_node_table_reset(&ic->ic_sta, vap);
432 /* XXX multi-bss: wrong */
433 ieee80211_reset_erp(ic);
435 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr);
436 KASSERT(ni != NULL, ("unable to setup initial BSS node"));
438 vap->iv_bss = ieee80211_ref_node(ni);
441 ni->ni_intval = ic->ic_bintval;
442 ieee80211_free_node(obss);
444 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr);
448 match_ssid(const struct ieee80211_node *ni,
449 int nssid, const struct ieee80211_scan_ssid ssids[])
453 for (i = 0; i < nssid; i++) {
454 if (ni->ni_esslen == ssids[i].len &&
455 memcmp(ni->ni_essid, ssids[i].ssid, ni->ni_esslen) == 0)
462 * Test a node for suitability/compatibility.
465 check_bss(struct ieee80211vap *vap, struct ieee80211_node *ni)
467 struct ieee80211com *ic = ni->ni_ic;
470 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan)))
472 if (vap->iv_opmode == IEEE80211_M_IBSS) {
473 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0)
476 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0)
479 if (vap->iv_flags & IEEE80211_F_PRIVACY) {
480 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0)
483 /* XXX does this mean privacy is supported or required? */
484 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY)
487 rate = ieee80211_fix_rate(ni, &ni->ni_rates,
488 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE);
489 if (rate & IEEE80211_RATE_BASIC)
491 if (vap->iv_des_nssid != 0 &&
492 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid))
494 if ((vap->iv_flags & IEEE80211_F_DESBSSID) &&
495 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid))
500 #ifdef IEEE80211_DEBUG
502 * Display node suitability/compatibility.
505 check_bss_debug(struct ieee80211vap *vap, struct ieee80211_node *ni)
507 struct ieee80211com *ic = ni->ni_ic;
512 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan)))
514 if (vap->iv_opmode == IEEE80211_M_IBSS) {
515 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0)
518 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0)
521 if (vap->iv_flags & IEEE80211_F_PRIVACY) {
522 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0)
525 /* XXX does this mean privacy is supported or required? */
526 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY)
529 rate = ieee80211_fix_rate(ni, &ni->ni_rates,
530 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE);
531 if (rate & IEEE80211_RATE_BASIC)
533 if (vap->iv_des_nssid != 0 &&
534 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid))
536 if ((vap->iv_flags & IEEE80211_F_DESBSSID) &&
537 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid))
540 kprintf(" %c %6D", fail ? '-' : '+', ni->ni_macaddr, ":");
541 kprintf(" %6D%c", ni->ni_bssid, ":", fail & 0x20 ? '!' : ' ');
543 ieee80211_chan2ieee(ic, ni->ni_chan), fail & 0x01 ? '!' : ' ');
544 kprintf(" %2dM%c", (rate & IEEE80211_RATE_VAL) / 2,
545 fail & 0x08 ? '!' : ' ');
547 (ni->ni_capinfo & IEEE80211_CAPINFO_ESS) ? "ess" :
548 (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) ? "ibss" :
550 fail & 0x02 ? '!' : ' ');
552 (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) ? "wep" : "no",
553 fail & 0x04 ? '!' : ' ');
554 ieee80211_print_essid(ni->ni_essid, ni->ni_esslen);
555 kprintf("%s\n", fail & 0x10 ? "!" : "");
557 #endif /* IEEE80211_DEBUG */
560 * Handle 802.11 ad hoc network merge. The
561 * convention, set by the Wireless Ethernet Compatibility Alliance
562 * (WECA), is that an 802.11 station will change its BSSID to match
563 * the "oldest" 802.11 ad hoc network, on the same channel, that
564 * has the station's desired SSID. The "oldest" 802.11 network
565 * sends beacons with the greatest TSF timestamp.
567 * The caller is assumed to validate TSF's before attempting a merge.
569 * Return !0 if the BSSID changed, 0 otherwise.
572 ieee80211_ibss_merge(struct ieee80211_node *ni)
574 struct ieee80211vap *vap = ni->ni_vap;
575 #ifdef IEEE80211_DEBUG
576 struct ieee80211com *ic = ni->ni_ic;
579 if (ni == vap->iv_bss ||
580 IEEE80211_ADDR_EQ(ni->ni_bssid, vap->iv_bss->ni_bssid)) {
581 /* unchanged, nothing to do */
584 if (!check_bss(vap, ni)) {
585 /* capabilities mismatch */
586 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC,
587 "%s: merge failed, capabilities mismatch\n", __func__);
588 #ifdef IEEE80211_DEBUG
589 if (ieee80211_msg_assoc(vap))
590 check_bss_debug(vap, ni);
592 vap->iv_stats.is_ibss_capmismatch++;
595 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC,
596 "%s: new bssid %6D: %s preamble, %s slot time%s\n", __func__,
598 ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long",
599 ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long",
600 ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : ""
602 return ieee80211_sta_join1(ieee80211_ref_node(ni));
606 * Calculate HT channel promotion flags for all vaps.
607 * This assumes ni_chan have been setup for each vap.
610 gethtadjustflags(struct ieee80211com *ic)
612 struct ieee80211vap *vap;
617 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
618 if (vap->iv_state < IEEE80211_S_RUN)
620 switch (vap->iv_opmode) {
621 case IEEE80211_M_WDS:
622 case IEEE80211_M_STA:
623 case IEEE80211_M_AHDEMO:
624 case IEEE80211_M_HOSTAP:
625 case IEEE80211_M_IBSS:
626 case IEEE80211_M_MBSS:
627 flags |= ieee80211_htchanflags(vap->iv_bss->ni_chan);
637 * Check if the current channel needs to change based on whether
638 * any vap's are using HT20/HT40. This is used to sync the state
639 * of ic_curchan after a channel width change on a running vap.
642 ieee80211_sync_curchan(struct ieee80211com *ic)
644 struct ieee80211_channel *c;
646 c = ieee80211_ht_adjust_channel(ic, ic->ic_curchan, gethtadjustflags(ic));
647 if (c != ic->ic_curchan) {
649 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan);
650 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan);
651 ic->ic_set_channel(ic);
652 ieee80211_radiotap_chan_change(ic);
657 * Setup the current channel. The request channel may be
658 * promoted if other vap's are operating with HT20/HT40.
661 ieee80211_setupcurchan(struct ieee80211com *ic, struct ieee80211_channel *c)
663 if (ic->ic_htcaps & IEEE80211_HTC_HT) {
664 int flags = gethtadjustflags(ic);
666 * Check for channel promotion required to support the
667 * set of running vap's. This assumes we are called
668 * after ni_chan is setup for each vap.
670 /* NB: this assumes IEEE80211_FHT_USEHT40 > IEEE80211_FHT_HT */
671 if (flags > ieee80211_htchanflags(c))
672 c = ieee80211_ht_adjust_channel(ic, c, flags);
674 ic->ic_bsschan = ic->ic_curchan = c;
675 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan);
676 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan);
680 * Change the current channel. The channel change is guaranteed to have
681 * happened before the next state change.
684 ieee80211_setcurchan(struct ieee80211com *ic, struct ieee80211_channel *c)
686 ieee80211_setupcurchan(ic, c);
687 ieee80211_runtask(ic, &ic->ic_chan_task);
691 * Join the specified IBSS/BSS network. The node is assumed to
692 * be passed in with a held reference.
695 ieee80211_sta_join1(struct ieee80211_node *selbs)
697 struct ieee80211vap *vap = selbs->ni_vap;
698 struct ieee80211com *ic = selbs->ni_ic;
699 struct ieee80211_node *obss;
703 * Committed to selbs, setup state.
707 * Check if old+new node have the same address in which
708 * case we can reassociate when operating in sta mode.
710 canreassoc = (obss != NULL &&
711 vap->iv_state == IEEE80211_S_RUN &&
712 IEEE80211_ADDR_EQ(obss->ni_macaddr, selbs->ni_macaddr));
713 vap->iv_bss = selbs; /* NB: caller assumed to bump refcnt */
715 copy_bss(selbs, obss);
716 ieee80211_node_decref(obss); /* iv_bss reference */
717 ieee80211_free_node(obss); /* station table reference */
718 obss = NULL; /* NB: guard against later use */
722 * Delete unusable rates; we've already checked
723 * that the negotiated rate set is acceptable.
725 ieee80211_fix_rate(vap->iv_bss, &vap->iv_bss->ni_rates,
726 IEEE80211_F_DODEL | IEEE80211_F_JOIN);
728 ieee80211_setcurchan(ic, selbs->ni_chan);
730 * Set the erp state (mostly the slot time) to deal with
731 * the auto-select case; this should be redundant if the
734 ieee80211_reset_erp(ic);
735 ieee80211_wme_initparams(vap);
737 if (vap->iv_opmode == IEEE80211_M_STA) {
740 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 1);
743 * Act as if we received a DEAUTH frame in case we
744 * are invoked from the RUN state. This will cause
745 * us to try to re-authenticate if we are operating
748 ieee80211_new_state(vap, IEEE80211_S_AUTH,
749 IEEE80211_FC0_SUBTYPE_DEAUTH);
752 ieee80211_new_state(vap, IEEE80211_S_RUN, -1);
757 ieee80211_sta_join(struct ieee80211vap *vap, struct ieee80211_channel *chan,
758 const struct ieee80211_scan_entry *se)
760 struct ieee80211com *ic = vap->iv_ic;
761 struct ieee80211_node *ni;
763 ni = ieee80211_alloc_node(&ic->ic_sta, vap, se->se_macaddr);
769 * Expand scan state into node's format.
770 * XXX may not need all this stuff
772 IEEE80211_ADDR_COPY(ni->ni_bssid, se->se_bssid);
773 ni->ni_esslen = se->se_ssid[1];
774 memcpy(ni->ni_essid, se->se_ssid+2, ni->ni_esslen);
775 ni->ni_tstamp.tsf = se->se_tstamp.tsf;
776 ni->ni_intval = se->se_intval;
777 ni->ni_capinfo = se->se_capinfo;
779 ni->ni_timoff = se->se_timoff;
780 ni->ni_fhdwell = se->se_fhdwell;
781 ni->ni_fhindex = se->se_fhindex;
782 ni->ni_erp = se->se_erp;
783 IEEE80211_RSSI_LPF(ni->ni_avgrssi, se->se_rssi);
784 ni->ni_noise = se->se_noise;
785 if (vap->iv_opmode == IEEE80211_M_STA) {
786 /* NB: only infrastructure mode requires an associd */
787 ni->ni_flags |= IEEE80211_NODE_ASSOCID;
790 if (ieee80211_ies_init(&ni->ni_ies, se->se_ies.data, se->se_ies.len)) {
791 ieee80211_ies_expand(&ni->ni_ies);
792 #ifdef IEEE80211_SUPPORT_SUPERG
793 if (ni->ni_ies.ath_ie != NULL)
794 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie);
796 if (ni->ni_ies.htcap_ie != NULL)
797 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie);
798 if (ni->ni_ies.htinfo_ie != NULL)
799 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie);
800 #ifdef IEEE80211_SUPPORT_MESH
801 if (ni->ni_ies.meshid_ie != NULL)
802 ieee80211_parse_meshid(ni, ni->ni_ies.meshid_ie);
804 #ifdef IEEE80211_SUPPORT_TDMA
805 if (ni->ni_ies.tdma_ie != NULL)
806 ieee80211_parse_tdma(ni, ni->ni_ies.tdma_ie);
810 vap->iv_dtim_period = se->se_dtimperiod;
811 vap->iv_dtim_count = 0;
813 /* NB: must be after ni_chan is setup */
814 ieee80211_setup_rates(ni, se->se_rates, se->se_xrates,
816 if (ieee80211_iserp_rateset(&ni->ni_rates))
817 ni->ni_flags |= IEEE80211_NODE_ERP;
818 ieee80211_node_setuptxparms(ni);
820 return ieee80211_sta_join1(ieee80211_ref_node(ni));
824 * Leave the specified IBSS/BSS network. The node is assumed to
825 * be passed in with a held reference.
828 ieee80211_sta_leave(struct ieee80211_node *ni)
830 struct ieee80211com *ic = ni->ni_ic;
832 ic->ic_node_cleanup(ni);
833 ieee80211_notify_node_leave(ni);
837 * Send a deauthenticate frame and drop the station.
840 ieee80211_node_deauth(struct ieee80211_node *ni, int reason)
842 /* NB: bump the refcnt to be sure temporay nodes are not reclaimed */
843 ieee80211_ref_node(ni);
844 if (ni->ni_associd != 0)
845 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH, reason);
846 ieee80211_node_leave(ni);
847 ieee80211_free_node(ni);
850 static struct ieee80211_node *
851 node_alloc(struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN])
853 struct ieee80211_node *ni;
855 ni = (struct ieee80211_node *) kmalloc(sizeof(struct ieee80211_node),
856 M_80211_NODE, M_INTWAIT | M_ZERO);
861 * Initialize an ie blob with the specified data. If previous
862 * data exists re-use the data block. As a side effect we clear
863 * all references to specific ie's; the caller is required to
867 ieee80211_ies_init(struct ieee80211_ies *ies, const uint8_t *data, int len)
869 /* NB: assumes data+len are the last fields */
870 memset(ies, 0, offsetof(struct ieee80211_ies, data));
871 if (ies->data != NULL && ies->len != len) {
872 /* data size changed */
873 kfree(ies->data, M_80211_NODE_IE);
876 if (ies->data == NULL) {
877 ies->data = (uint8_t *) kmalloc(len, M_80211_NODE_IE, M_INTWAIT);
878 if (ies->data == NULL) {
880 /* NB: pointers have already been zero'd above */
884 memcpy(ies->data, data, len);
890 * Reclaim storage for an ie blob.
893 ieee80211_ies_cleanup(struct ieee80211_ies *ies)
895 if (ies->data != NULL)
896 kfree(ies->data, M_80211_NODE_IE);
900 * Expand an ie blob data contents and to fillin individual
901 * ie pointers. The data blob is assumed to be well-formed;
902 * we don't do any validity checking of ie lengths.
905 ieee80211_ies_expand(struct ieee80211_ies *ies)
914 case IEEE80211_ELEMID_VENDOR:
917 else if (iswmeoui(ie))
919 #ifdef IEEE80211_SUPPORT_SUPERG
920 else if (isatherosoui(ie))
923 #ifdef IEEE80211_SUPPORT_TDMA
924 else if (istdmaoui(ie))
928 case IEEE80211_ELEMID_RSN:
931 case IEEE80211_ELEMID_HTCAP:
934 #ifdef IEEE80211_SUPPORT_MESH
935 case IEEE80211_ELEMID_MESHID:
946 * Reclaim any resources in a node and reset any critical
947 * state. Typically nodes are free'd immediately after,
948 * but in some cases the storage may be reused so we need
949 * to insure consistent state (should probably fix that).
952 node_cleanup(struct ieee80211_node *ni)
954 struct ieee80211vap *vap = ni->ni_vap;
955 struct ieee80211com *ic = ni->ni_ic;
958 /* NB: preserve ni_table */
959 if (ni->ni_flags & IEEE80211_NODE_PWR_MGT) {
960 if (vap->iv_opmode != IEEE80211_M_STA)
962 ni->ni_flags &= ~IEEE80211_NODE_PWR_MGT;
963 IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni,
964 "power save mode off, %u sta's in ps mode", vap->iv_ps_sta);
967 * Cleanup any HT-related state.
969 if (ni->ni_flags & IEEE80211_NODE_HT)
970 ieee80211_ht_node_cleanup(ni);
971 #ifdef IEEE80211_SUPPORT_SUPERG
972 else if (ni->ni_ath_flags & IEEE80211_NODE_ATH)
973 ieee80211_ff_node_cleanup(ni);
975 #ifdef IEEE80211_SUPPORT_MESH
977 * Cleanup any mesh-related state.
979 if (vap->iv_opmode == IEEE80211_M_MBSS)
980 ieee80211_mesh_node_cleanup(ni);
983 * Clear any staging queue entries.
985 ieee80211_ageq_drain_node(&ic->ic_stageq, ni);
988 * Clear AREF flag that marks the authorization refcnt bump
989 * has happened. This is probably not needed as the node
990 * should always be removed from the table so not found but
991 * do it just in case.
992 * Likewise clear the ASSOCID flag as these flags are intended
993 * to be managed in tandem.
995 ni->ni_flags &= ~(IEEE80211_NODE_AREF | IEEE80211_NODE_ASSOCID);
998 * Drain power save queue and, if needed, clear TIM.
1000 if (ieee80211_node_psq_drain(ni) != 0 && vap->iv_set_tim != NULL)
1001 vap->iv_set_tim(ni, 0);
1004 if (ni->ni_challenge != NULL) {
1005 kfree(ni->ni_challenge, M_80211_NODE);
1006 ni->ni_challenge = NULL;
1009 * Preserve SSID, WPA, and WME ie's so the bss node is
1010 * reusable during a re-auth/re-assoc state transition.
1011 * If we remove these data they will not be recreated
1012 * because they come from a probe-response or beacon frame
1013 * which cannot be expected prior to the association-response.
1014 * This should not be an issue when operating in other modes
1015 * as stations leaving always go through a full state transition
1016 * which will rebuild this state.
1018 * XXX does this leave us open to inheriting old state?
1020 for (i = 0; i < NELEM(ni->ni_rxfrag); i++)
1021 if (ni->ni_rxfrag[i] != NULL) {
1022 m_freem(ni->ni_rxfrag[i]);
1023 ni->ni_rxfrag[i] = NULL;
1026 * Must be careful here to remove any key map entry w/o a LOR.
1028 ieee80211_node_delucastkey(ni);
1032 node_free(struct ieee80211_node *ni)
1034 struct ieee80211com *ic = ni->ni_ic;
1036 ieee80211_ratectl_node_deinit(ni);
1037 ic->ic_node_cleanup(ni);
1038 ieee80211_ies_cleanup(&ni->ni_ies);
1039 ieee80211_psq_cleanup(&ni->ni_psq);
1040 kfree(ni, M_80211_NODE);
1044 node_age(struct ieee80211_node *ni)
1046 struct ieee80211vap *vap = ni->ni_vap;
1049 * Age frames on the power save queue.
1051 if (ieee80211_node_psq_age(ni) != 0 &&
1052 ni->ni_psq.psq_len == 0 && vap->iv_set_tim != NULL)
1053 vap->iv_set_tim(ni, 0);
1055 * Age out HT resources (e.g. frames on the
1056 * A-MPDU reorder queues).
1058 if (ni->ni_associd != 0 && (ni->ni_flags & IEEE80211_NODE_HT))
1059 ieee80211_ht_node_age(ni);
1063 node_getrssi(const struct ieee80211_node *ni)
1065 uint32_t avgrssi = ni->ni_avgrssi;
1068 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER)
1070 rssi = IEEE80211_RSSI_GET(avgrssi);
1071 return rssi < 0 ? 0 : rssi > 127 ? 127 : rssi;
1075 node_getsignal(const struct ieee80211_node *ni, int8_t *rssi, int8_t *noise)
1077 *rssi = node_getrssi(ni);
1078 *noise = ni->ni_noise;
1082 node_getmimoinfo(const struct ieee80211_node *ni,
1083 struct ieee80211_mimo_info *info)
1085 /* XXX zero data? */
1088 struct ieee80211_node *
1089 ieee80211_alloc_node(struct ieee80211_node_table *nt,
1090 struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN])
1092 struct ieee80211com *ic = nt->nt_ic;
1093 struct ieee80211_node *ni;
1096 ni = ic->ic_node_alloc(vap, macaddr);
1098 vap->iv_stats.is_rx_nodealloc++;
1102 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1103 "%s %p<%6D> in %s table\n", __func__, ni,
1104 macaddr, ":", nt->nt_name);
1106 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr);
1107 hash = IEEE80211_NODE_HASH(ic, macaddr);
1108 ieee80211_node_initref(ni); /* mark referenced */
1109 ni->ni_chan = IEEE80211_CHAN_ANYC;
1110 ni->ni_authmode = IEEE80211_AUTH_OPEN;
1111 ni->ni_txpower = ic->ic_txpowlimit; /* max power */
1112 ni->ni_txparms = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)];
1113 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE);
1114 ni->ni_avgrssi = IEEE80211_RSSI_DUMMY_MARKER;
1115 ni->ni_inact_reload = nt->nt_inact_init;
1116 ni->ni_inact = ni->ni_inact_reload;
1117 ni->ni_ath_defkeyix = 0x7fff;
1118 ieee80211_psq_init(&ni->ni_psq, "unknown");
1119 #ifdef IEEE80211_SUPPORT_MESH
1120 if (vap->iv_opmode == IEEE80211_M_MBSS)
1121 ieee80211_mesh_node_init(vap, ni);
1123 TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list);
1124 LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash);
1129 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni,
1130 "%s: inact_reload %u", __func__, ni->ni_inact_reload);
1136 * Craft a temporary node suitable for sending a management frame
1137 * to the specified station. We craft only as much state as we
1138 * need to do the work since the node will be immediately reclaimed
1139 * once the send completes.
1141 struct ieee80211_node *
1142 ieee80211_tmp_node(struct ieee80211vap *vap,
1143 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1145 struct ieee80211com *ic = vap->iv_ic;
1146 struct ieee80211_node *ni;
1148 ni = ic->ic_node_alloc(vap, macaddr);
1150 struct ieee80211_node *bss = vap->iv_bss;
1152 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1153 "%s %p<%6D>\n", __func__, ni, macaddr, ":");
1155 ni->ni_table = NULL; /* NB: pedantic */
1156 ni->ni_ic = ic; /* NB: needed to set channel */
1159 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr);
1160 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid);
1161 ieee80211_node_initref(ni); /* mark referenced */
1162 /* NB: required by ieee80211_fix_rate */
1163 ieee80211_node_set_chan(ni, bss->ni_chan);
1164 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey,
1165 IEEE80211_KEYIX_NONE);
1166 ni->ni_txpower = bss->ni_txpower;
1167 /* XXX optimize away */
1168 ieee80211_psq_init(&ni->ni_psq, "unknown");
1171 vap->iv_stats.is_rx_nodealloc++;
1176 struct ieee80211_node *
1177 ieee80211_dup_bss(struct ieee80211vap *vap,
1178 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1180 struct ieee80211com *ic = vap->iv_ic;
1181 struct ieee80211_node *ni;
1183 ni = ieee80211_alloc_node(&ic->ic_sta, vap, macaddr);
1185 struct ieee80211_node *bss = vap->iv_bss;
1187 * Inherit from iv_bss.
1190 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid);
1191 ieee80211_node_set_chan(ni, bss->ni_chan);
1197 * Create a bss node for a legacy WDS vap. The far end does
1198 * not associate so we just create create a new node and
1199 * simulate an association. The caller is responsible for
1200 * installing the node as the bss node and handling any further
1201 * setup work like authorizing the port.
1203 struct ieee80211_node *
1204 ieee80211_node_create_wds(struct ieee80211vap *vap,
1205 const uint8_t bssid[IEEE80211_ADDR_LEN], struct ieee80211_channel *chan)
1207 struct ieee80211com *ic = vap->iv_ic;
1208 struct ieee80211_node *ni;
1210 /* XXX check if node already in sta table? */
1211 ni = ieee80211_alloc_node(&ic->ic_sta, vap, bssid);
1213 ni->ni_wdsvap = vap;
1214 IEEE80211_ADDR_COPY(ni->ni_bssid, bssid);
1216 * Inherit any manually configured settings.
1218 copy_bss(ni, vap->iv_bss);
1219 ieee80211_node_set_chan(ni, chan);
1220 /* NB: propagate ssid so available to WPA supplicant */
1221 ni->ni_esslen = vap->iv_des_ssid[0].len;
1222 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen);
1223 /* NB: no associd for peer */
1225 * There are no management frames to use to
1226 * discover neighbor capabilities, so blindly
1227 * propagate the local configuration.
1229 if (vap->iv_flags & IEEE80211_F_WME)
1230 ni->ni_flags |= IEEE80211_NODE_QOS;
1231 #ifdef IEEE80211_SUPPORT_SUPERG
1232 if (vap->iv_flags & IEEE80211_F_FF)
1233 ni->ni_flags |= IEEE80211_NODE_FF;
1235 if ((ic->ic_htcaps & IEEE80211_HTC_HT) &&
1236 (vap->iv_flags_ht & IEEE80211_FHT_HT)) {
1238 * Device is HT-capable and HT is enabled for
1239 * the vap; setup HT operation. On return
1240 * ni_chan will be adjusted to an HT channel.
1242 ieee80211_ht_wds_init(ni);
1244 struct ieee80211_channel *c = ni->ni_chan;
1246 * Force a legacy channel to be used.
1248 c = ieee80211_find_channel(ic,
1249 c->ic_freq, c->ic_flags &~ IEEE80211_CHAN_HT);
1250 KASSERT(c != NULL, ("no legacy channel, %u/%x",
1251 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags));
1258 struct ieee80211_node *
1259 #ifdef IEEE80211_DEBUG_REFCNT
1260 ieee80211_find_node_locked_debug(struct ieee80211_node_table *nt,
1261 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line)
1263 ieee80211_find_node_locked(struct ieee80211_node_table *nt,
1264 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1267 struct ieee80211_node *ni;
1270 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr);
1271 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) {
1272 if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) {
1273 ieee80211_ref_node(ni); /* mark referenced */
1274 #ifdef IEEE80211_DEBUG_REFCNT
1275 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1276 "%s (%s:%u) %p<%6D> refcnt %d\n", __func__,
1278 ni, ni->ni_macaddr, ":",
1279 ieee80211_node_refcnt(ni));
1287 struct ieee80211_node *
1288 #ifdef IEEE80211_DEBUG_REFCNT
1289 ieee80211_find_node_debug(struct ieee80211_node_table *nt,
1290 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line)
1292 ieee80211_find_node(struct ieee80211_node_table *nt,
1293 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1296 struct ieee80211_node *ni;
1298 ni = ieee80211_find_node_locked(nt, macaddr);
1302 struct ieee80211_node *
1303 #ifdef IEEE80211_DEBUG_REFCNT
1304 ieee80211_find_vap_node_locked_debug(struct ieee80211_node_table *nt,
1305 const struct ieee80211vap *vap,
1306 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line)
1308 ieee80211_find_vap_node_locked(struct ieee80211_node_table *nt,
1309 const struct ieee80211vap *vap,
1310 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1313 struct ieee80211_node *ni;
1316 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr);
1317 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) {
1318 if (ni->ni_vap == vap &&
1319 IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) {
1320 ieee80211_ref_node(ni); /* mark referenced */
1321 #ifdef IEEE80211_DEBUG_REFCNT
1322 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1323 "%s (%s:%u) %p<%6D> refcnt %d\n", __func__,
1325 ni, ni->ni_macaddr, ":",
1326 ieee80211_node_refcnt(ni));
1334 struct ieee80211_node *
1335 #ifdef IEEE80211_DEBUG_REFCNT
1336 ieee80211_find_vap_node_debug(struct ieee80211_node_table *nt,
1337 const struct ieee80211vap *vap,
1338 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line)
1340 ieee80211_find_vap_node(struct ieee80211_node_table *nt,
1341 const struct ieee80211vap *vap,
1342 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1345 struct ieee80211_node *ni;
1347 ni = ieee80211_find_vap_node_locked(nt, vap, macaddr);
1352 * Fake up a node; this handles node discovery in adhoc mode.
1353 * Note that for the driver's benefit we we treat this like
1354 * an association so the driver has an opportunity to setup
1355 * it's private state.
1357 struct ieee80211_node *
1358 ieee80211_fakeup_adhoc_node(struct ieee80211vap *vap,
1359 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1361 struct ieee80211_node *ni;
1363 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1364 "%s: mac<%6D>\n", __func__, macaddr, ":");
1365 ni = ieee80211_dup_bss(vap, macaddr);
1367 struct ieee80211com *ic = vap->iv_ic;
1369 /* XXX no rate negotiation; just dup */
1370 ni->ni_rates = vap->iv_bss->ni_rates;
1371 if (ieee80211_iserp_rateset(&ni->ni_rates))
1372 ni->ni_flags |= IEEE80211_NODE_ERP;
1373 if (vap->iv_opmode == IEEE80211_M_AHDEMO) {
1375 * In adhoc demo mode there are no management
1376 * frames to use to discover neighbor capabilities,
1377 * so blindly propagate the local configuration
1378 * so we can do interesting things (e.g. use
1379 * WME to disable ACK's).
1381 if (vap->iv_flags & IEEE80211_F_WME)
1382 ni->ni_flags |= IEEE80211_NODE_QOS;
1383 #ifdef IEEE80211_SUPPORT_SUPERG
1384 if (vap->iv_flags & IEEE80211_F_FF)
1385 ni->ni_flags |= IEEE80211_NODE_FF;
1388 ieee80211_node_setuptxparms(ni);
1389 if (ic->ic_newassoc != NULL)
1390 ic->ic_newassoc(ni, 1);
1391 /* XXX not right for 802.1x/WPA */
1392 ieee80211_node_authorize(ni);
1398 ieee80211_init_neighbor(struct ieee80211_node *ni,
1399 const struct ieee80211_frame *wh,
1400 const struct ieee80211_scanparams *sp)
1402 ni->ni_esslen = sp->ssid[1];
1403 memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]);
1404 IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3);
1405 memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp));
1406 ni->ni_intval = sp->bintval;
1407 ni->ni_capinfo = sp->capinfo;
1408 ni->ni_chan = ni->ni_ic->ic_curchan;
1409 ni->ni_fhdwell = sp->fhdwell;
1410 ni->ni_fhindex = sp->fhindex;
1411 ni->ni_erp = sp->erp;
1412 ni->ni_timoff = sp->timoff;
1413 #ifdef IEEE80211_SUPPORT_MESH
1414 if (ni->ni_vap->iv_opmode == IEEE80211_M_MBSS)
1415 ieee80211_mesh_init_neighbor(ni, wh, sp);
1417 if (ieee80211_ies_init(&ni->ni_ies, sp->ies, sp->ies_len)) {
1418 ieee80211_ies_expand(&ni->ni_ies);
1419 if (ni->ni_ies.wme_ie != NULL)
1420 ni->ni_flags |= IEEE80211_NODE_QOS;
1422 ni->ni_flags &= ~IEEE80211_NODE_QOS;
1423 #ifdef IEEE80211_SUPPORT_SUPERG
1424 if (ni->ni_ies.ath_ie != NULL)
1425 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie);
1429 /* NB: must be after ni_chan is setup */
1430 ieee80211_setup_rates(ni, sp->rates, sp->xrates,
1431 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE |
1432 IEEE80211_F_DONEGO | IEEE80211_F_DODEL);
1436 * Do node discovery in adhoc mode on receipt of a beacon
1437 * or probe response frame. Note that for the driver's
1438 * benefit we we treat this like an association so the
1439 * driver has an opportunity to setup it's private state.
1441 struct ieee80211_node *
1442 ieee80211_add_neighbor(struct ieee80211vap *vap,
1443 const struct ieee80211_frame *wh,
1444 const struct ieee80211_scanparams *sp)
1446 struct ieee80211_node *ni;
1448 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1449 "%s: mac<%6D>\n", __func__, wh->i_addr2, ":");
1450 ni = ieee80211_dup_bss(vap, wh->i_addr2);/* XXX alloc_node? */
1452 struct ieee80211com *ic = vap->iv_ic;
1454 ieee80211_init_neighbor(ni, wh, sp);
1455 if (ieee80211_iserp_rateset(&ni->ni_rates))
1456 ni->ni_flags |= IEEE80211_NODE_ERP;
1457 ieee80211_node_setuptxparms(ni);
1458 if (ic->ic_newassoc != NULL)
1459 ic->ic_newassoc(ni, 1);
1460 /* XXX not right for 802.1x/WPA */
1461 ieee80211_node_authorize(ni);
1466 #define IS_PROBEREQ(wh) \
1467 ((wh->i_fc[0] & (IEEE80211_FC0_TYPE_MASK|IEEE80211_FC0_SUBTYPE_MASK)) \
1468 == (IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ))
1469 #define IS_BCAST_PROBEREQ(wh) \
1470 (IS_PROBEREQ(wh) && IEEE80211_IS_MULTICAST( \
1471 ((const struct ieee80211_frame *)(wh))->i_addr3))
1473 static __inline struct ieee80211_node *
1474 _find_rxnode(struct ieee80211_node_table *nt,
1475 const struct ieee80211_frame_min *wh)
1477 if (IS_BCAST_PROBEREQ(wh))
1478 return NULL; /* spam bcast probe req to all vap's */
1479 return ieee80211_find_node_locked(nt, wh->i_addr2);
1483 * Locate the node for sender, track state, and then pass the
1484 * (referenced) node up to the 802.11 layer for its use. Note
1485 * we can return NULL if the sender is not in the table.
1487 struct ieee80211_node *
1488 #ifdef IEEE80211_DEBUG_REFCNT
1489 ieee80211_find_rxnode_debug(struct ieee80211com *ic,
1490 const struct ieee80211_frame_min *wh, const char *func, int line)
1492 ieee80211_find_rxnode(struct ieee80211com *ic,
1493 const struct ieee80211_frame_min *wh)
1496 struct ieee80211_node_table *nt;
1497 struct ieee80211_node *ni;
1500 ni = _find_rxnode(nt, wh);
1506 * Like ieee80211_find_rxnode but use the supplied h/w
1507 * key index as a hint to locate the node in the key
1508 * mapping table. If an entry is present at the key
1509 * index we return it; otherwise do a normal lookup and
1510 * update the mapping table if the station has a unicast
1511 * key assigned to it.
1513 struct ieee80211_node *
1514 #ifdef IEEE80211_DEBUG_REFCNT
1515 ieee80211_find_rxnode_withkey_debug(struct ieee80211com *ic,
1516 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix,
1517 const char *func, int line)
1519 ieee80211_find_rxnode_withkey(struct ieee80211com *ic,
1520 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix)
1523 struct ieee80211_node_table *nt;
1524 struct ieee80211_node *ni;
1527 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax)
1528 ni = nt->nt_keyixmap[keyix];
1532 ni = _find_rxnode(nt, wh);
1533 if (ni != NULL && nt->nt_keyixmap != NULL) {
1535 * If the station has a unicast key cache slot
1536 * assigned update the key->node mapping table.
1538 keyix = ni->ni_ucastkey.wk_rxkeyix;
1539 /* XXX can keyixmap[keyix] != NULL? */
1540 if (keyix < nt->nt_keyixmax &&
1541 nt->nt_keyixmap[keyix] == NULL) {
1542 IEEE80211_DPRINTF(ni->ni_vap,
1544 "%s: add key map entry %p<%6D> refcnt %d\n",
1545 __func__, ni, ni->ni_macaddr, ":",
1546 ieee80211_node_refcnt(ni)+1);
1547 nt->nt_keyixmap[keyix] = ieee80211_ref_node(ni);
1551 if (IS_BCAST_PROBEREQ(wh))
1552 ni = NULL; /* spam bcast probe req to all vap's */
1554 ieee80211_ref_node(ni);
1558 #undef IS_BCAST_PROBEREQ
1562 * Return a reference to the appropriate node for sending
1563 * a data frame. This handles node discovery in adhoc networks.
1565 struct ieee80211_node *
1566 #ifdef IEEE80211_DEBUG_REFCNT
1567 ieee80211_find_txnode_debug(struct ieee80211vap *vap,
1568 const uint8_t macaddr[IEEE80211_ADDR_LEN],
1569 const char *func, int line)
1571 ieee80211_find_txnode(struct ieee80211vap *vap,
1572 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1575 struct ieee80211_node_table *nt = &vap->iv_ic->ic_sta;
1576 struct ieee80211_node *ni;
1579 * The destination address should be in the node table
1580 * unless this is a multicast/broadcast frame. We can
1581 * also optimize station mode operation, all frames go
1584 /* XXX can't hold lock across dup_bss 'cuz of recursive locking */
1585 if (vap->iv_opmode == IEEE80211_M_STA ||
1586 vap->iv_opmode == IEEE80211_M_WDS ||
1587 IEEE80211_IS_MULTICAST(macaddr))
1588 ni = ieee80211_ref_node(vap->iv_bss);
1590 ni = ieee80211_find_node_locked(nt, macaddr);
1593 if (vap->iv_opmode == IEEE80211_M_IBSS ||
1594 vap->iv_opmode == IEEE80211_M_AHDEMO) {
1596 * In adhoc mode cons up a node for the destination.
1597 * Note that we need an additional reference for the
1598 * caller to be consistent with
1599 * ieee80211_find_node_locked.
1601 ni = ieee80211_fakeup_adhoc_node(vap, macaddr);
1603 (void) ieee80211_ref_node(ni);
1605 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, macaddr,
1606 "no node, discard frame (%s)", __func__);
1607 vap->iv_stats.is_tx_nonode++;
1614 _ieee80211_free_node(struct ieee80211_node *ni)
1616 struct ieee80211_node_table *nt = ni->ni_table;
1619 * NB: careful about referencing the vap as it may be
1620 * gone if the last reference was held by a driver.
1621 * We know the com will always be present so it's safe
1622 * to use ni_ic below to reclaim resources.
1625 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1626 "%s %p<%6D> in %s table\n", __func__, ni,
1627 ni->ni_macaddr, ":",
1628 nt != NULL ? nt->nt_name : "<gone>");
1630 if (ni->ni_associd != 0) {
1631 struct ieee80211vap *vap = ni->ni_vap;
1632 if (vap->iv_aid_bitmap != NULL)
1633 IEEE80211_AID_CLR(vap, ni->ni_associd);
1636 TAILQ_REMOVE(&nt->nt_node, ni, ni_list);
1637 LIST_REMOVE(ni, ni_hash);
1639 ni->ni_ic->ic_node_free(ni);
1643 #ifdef IEEE80211_DEBUG_REFCNT
1644 ieee80211_free_node_debug(struct ieee80211_node *ni, const char *func, int line)
1646 ieee80211_free_node(struct ieee80211_node *ni)
1649 struct ieee80211_node_table *nt = ni->ni_table;
1651 #ifdef IEEE80211_DEBUG_REFCNT
1652 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1653 "%s (%s:%u) %p<%6D> refcnt %d\n", __func__, func, line, ni,
1654 ni->ni_macaddr, ":", ieee80211_node_refcnt(ni)-1);
1657 if (ieee80211_node_dectestref(ni)) {
1659 * Last reference, reclaim state.
1661 _ieee80211_free_node(ni);
1662 } else if (ieee80211_node_refcnt(ni) == 1 &&
1663 nt->nt_keyixmap != NULL) {
1664 ieee80211_keyix keyix;
1666 * Check for a last reference in the key mapping table.
1668 keyix = ni->ni_ucastkey.wk_rxkeyix;
1669 if (keyix < nt->nt_keyixmax &&
1670 nt->nt_keyixmap[keyix] == ni) {
1671 IEEE80211_DPRINTF(ni->ni_vap,
1673 "%s: %p<%6D> clear key map entry", __func__,
1674 ni, ni->ni_macaddr, ":");
1675 nt->nt_keyixmap[keyix] = NULL;
1676 ieee80211_node_decref(ni); /* XXX needed? */
1677 _ieee80211_free_node(ni);
1681 if (ieee80211_node_dectestref(ni))
1682 _ieee80211_free_node(ni);
1687 * Reclaim a unicast key and clear any key cache state.
1690 ieee80211_node_delucastkey(struct ieee80211_node *ni)
1692 struct ieee80211com *ic = ni->ni_ic;
1693 struct ieee80211_node_table *nt = &ic->ic_sta;
1694 struct ieee80211_node *nikey;
1695 ieee80211_keyix keyix;
1699 * NB: We must beware of LOR here; deleting the key
1700 * can cause the crypto layer to block traffic updates
1701 * which can generate a LOR against the node table lock;
1702 * grab it here and stash the key index for our use below.
1704 * Must also beware of recursion on the node table lock.
1705 * When called from node_cleanup we may already have
1706 * the node table lock held. Unfortunately there's no
1707 * way to separate out this path so we must do this
1711 status = 1; /* NB: success */
1712 if (ni->ni_ucastkey.wk_keyix != IEEE80211_KEYIX_NONE) {
1713 keyix = ni->ni_ucastkey.wk_rxkeyix;
1714 status = ieee80211_crypto_delkey(ni->ni_vap, &ni->ni_ucastkey);
1715 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) {
1716 nikey = nt->nt_keyixmap[keyix];
1717 nt->nt_keyixmap[keyix] = NULL;
1721 if (nikey != NULL) {
1722 KASSERT(nikey == ni,
1723 ("key map out of sync, ni %p nikey %p", ni, nikey));
1724 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1725 "%s: delete key map entry %p<%6D> refcnt %d\n",
1726 __func__, ni, ni->ni_macaddr, ":",
1727 ieee80211_node_refcnt(ni)-1);
1728 ieee80211_free_node(ni);
1734 * Reclaim a node. If this is the last reference count then
1735 * do the normal free work. Otherwise remove it from the node
1736 * table and mark it gone by clearing the back-reference.
1739 node_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni)
1741 ieee80211_keyix keyix;
1743 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1744 "%s: remove %p<%6D> from %s table, refcnt %d\n",
1745 __func__, ni, ni->ni_macaddr, ":",
1746 nt->nt_name, ieee80211_node_refcnt(ni)-1);
1748 * Clear any entry in the unicast key mapping table.
1749 * We need to do it here so rx lookups don't find it
1750 * in the mapping table even if it's not in the hash
1751 * table. We cannot depend on the mapping table entry
1752 * being cleared because the node may not be free'd.
1754 keyix = ni->ni_ucastkey.wk_rxkeyix;
1755 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax &&
1756 nt->nt_keyixmap[keyix] == ni) {
1757 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1758 "%s: %p<%6D> clear key map entry %u\n",
1759 __func__, ni, ni->ni_macaddr, ":", keyix);
1760 nt->nt_keyixmap[keyix] = NULL;
1761 ieee80211_node_decref(ni); /* NB: don't need free */
1763 if (!ieee80211_node_dectestref(ni)) {
1765 * Other references are present, just remove the
1766 * node from the table so it cannot be found. When
1767 * the references are dropped storage will be
1770 TAILQ_REMOVE(&nt->nt_node, ni, ni_list);
1771 LIST_REMOVE(ni, ni_hash);
1772 ni->ni_table = NULL; /* clear reference */
1774 _ieee80211_free_node(ni);
1778 * Node table support.
1782 ieee80211_node_table_init(struct ieee80211com *ic,
1783 struct ieee80211_node_table *nt,
1784 const char *name, int inact, int keyixmax)
1787 TAILQ_INIT(&nt->nt_node);
1790 nt->nt_inact_init = inact;
1791 nt->nt_keyixmax = keyixmax;
1792 if (nt->nt_keyixmax > 0) {
1793 nt->nt_keyixmap = (struct ieee80211_node **) kmalloc(
1794 keyixmax * sizeof(struct ieee80211_node *),
1795 M_80211_NODE, M_INTWAIT | M_ZERO);
1796 if (nt->nt_keyixmap == NULL)
1797 if_printf(ic->ic_ifp,
1798 "Cannot allocate key index map with %u entries\n",
1801 nt->nt_keyixmap = NULL;
1805 ieee80211_node_table_reset(struct ieee80211_node_table *nt,
1806 struct ieee80211vap *match)
1808 struct ieee80211_node *ni, *next;
1810 TAILQ_FOREACH_MUTABLE(ni, &nt->nt_node, ni_list, next) {
1811 if (match != NULL && ni->ni_vap != match)
1813 /* XXX can this happen? if so need's work */
1814 if (ni->ni_associd != 0) {
1815 struct ieee80211vap *vap = ni->ni_vap;
1817 if (vap->iv_auth->ia_node_leave != NULL)
1818 vap->iv_auth->ia_node_leave(ni);
1819 if (vap->iv_aid_bitmap != NULL)
1820 IEEE80211_AID_CLR(vap, ni->ni_associd);
1822 ni->ni_wdsvap = NULL; /* clear reference */
1823 node_reclaim(nt, ni);
1825 if (match != NULL && match->iv_opmode == IEEE80211_M_WDS) {
1827 * Make a separate pass to clear references to this vap
1828 * held by DWDS entries. They will not be matched above
1829 * because ni_vap will point to the ap vap but we still
1830 * need to clear ni_wdsvap when the WDS vap is destroyed
1833 TAILQ_FOREACH_MUTABLE(ni, &nt->nt_node, ni_list, next)
1834 if (ni->ni_wdsvap == match)
1835 ni->ni_wdsvap = NULL;
1840 ieee80211_node_table_cleanup(struct ieee80211_node_table *nt)
1842 ieee80211_node_table_reset(nt, NULL);
1843 if (nt->nt_keyixmap != NULL) {
1845 /* XXX verify all entries are NULL */
1847 for (i = 0; i < nt->nt_keyixmax; i++)
1848 if (nt->nt_keyixmap[i] != NULL)
1849 kprintf("%s: %s[%u] still active\n", __func__,
1852 kfree(nt->nt_keyixmap, M_80211_NODE);
1853 nt->nt_keyixmap = NULL;
1858 * Timeout inactive stations and do related housekeeping.
1859 * Note that we cannot hold the node lock while sending a
1860 * frame as this would lead to a LOR. Instead we use a
1861 * generation number to mark nodes that we've scanned and
1862 * drop the lock and restart a scan if we have to time out
1863 * a node. Since we are single-threaded by virtue of
1864 * controlling the inactivity timer we can be sure this will
1865 * process each node only once.
1868 ieee80211_timeout_stations(struct ieee80211com *ic)
1870 struct ieee80211_node_table *nt = &ic->ic_sta;
1871 struct ieee80211vap *vap;
1872 struct ieee80211_node *ni;
1875 gen = ++nt->nt_scangen;
1877 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) {
1878 if (ni->ni_scangen == gen) /* previously handled */
1880 ni->ni_scangen = gen;
1882 * Ignore entries for which have yet to receive an
1883 * authentication frame. These are transient and
1884 * will be reclaimed when the last reference to them
1885 * goes away (when frame xmits complete).
1889 * Only process stations when in RUN state. This
1890 * insures, for example, that we don't timeout an
1891 * inactive station during CAC. Note that CSA state
1892 * is actually handled in ieee80211_node_timeout as
1893 * it applies to more than timeout processing.
1895 if (vap->iv_state != IEEE80211_S_RUN)
1897 /* XXX can vap be NULL? */
1898 if ((vap->iv_opmode == IEEE80211_M_HOSTAP ||
1899 vap->iv_opmode == IEEE80211_M_STA) &&
1900 (ni->ni_flags & IEEE80211_NODE_AREF) == 0)
1903 * Free fragment if not needed anymore
1904 * (last fragment older than 1s).
1905 * XXX doesn't belong here, move to node_age
1907 if (ni->ni_rxfrag[0] != NULL &&
1908 ticks > ni->ni_rxfragstamp + hz) {
1909 m_freem(ni->ni_rxfrag[0]);
1910 ni->ni_rxfrag[0] = NULL;
1912 if (ni->ni_inact > 0) {
1914 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni,
1915 "%s: inact %u inact_reload %u nrates %u",
1916 __func__, ni->ni_inact, ni->ni_inact_reload,
1917 ni->ni_rates.rs_nrates);
1920 * Special case ourself; we may be idle for extended periods
1921 * of time and regardless reclaiming our state is wrong.
1922 * XXX run ic_node_age
1924 if (ni == vap->iv_bss)
1926 if (ni->ni_associd != 0 ||
1927 (vap->iv_opmode == IEEE80211_M_IBSS ||
1928 vap->iv_opmode == IEEE80211_M_AHDEMO)) {
1930 * Age/drain resources held by the station.
1932 ic->ic_node_age(ni);
1934 * Probe the station before time it out. We
1935 * send a null data frame which may not be
1936 * universally supported by drivers (need it
1937 * for ps-poll support so it should be...).
1939 * XXX don't probe the station unless we've
1940 * received a frame from them (and have
1941 * some idea of the rates they are capable
1942 * of); this will get fixed more properly
1943 * soon with better handling of the rate set.
1945 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) &&
1946 (0 < ni->ni_inact &&
1947 ni->ni_inact <= vap->iv_inact_probe) &&
1948 ni->ni_rates.rs_nrates != 0) {
1950 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE,
1952 "probe station due to inactivity");
1954 * Grab a reference before unlocking the table
1955 * so the node cannot be reclaimed before we
1956 * send the frame. ieee80211_send_nulldata
1957 * understands we've done this and reclaims the
1958 * ref for us as needed.
1960 ieee80211_ref_node(ni);
1961 ieee80211_send_nulldata(ni);
1966 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) &&
1967 ni->ni_inact <= 0) {
1969 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, ni,
1970 "station timed out due to inactivity "
1971 "(refcnt %u)", ieee80211_node_refcnt(ni));
1973 * Send a deauthenticate frame and drop the station.
1974 * This is somewhat complicated due to reference counts
1975 * and locking. At this point a station will typically
1976 * have a reference count of 1. ieee80211_node_leave
1977 * will do a "free" of the node which will drop the
1978 * reference count. But in the meantime a reference
1979 * wil be held by the deauth frame. The actual reclaim
1980 * of the node will happen either after the tx is
1981 * completed or by ieee80211_node_leave.
1983 * Separately we must drop the node lock before sending
1984 * in case the driver takes a lock, as this can result
1985 * in a LOR between the node lock and the driver lock.
1987 ieee80211_ref_node(ni);
1988 if (ni->ni_associd != 0) {
1989 IEEE80211_SEND_MGMT(ni,
1990 IEEE80211_FC0_SUBTYPE_DEAUTH,
1991 IEEE80211_REASON_AUTH_EXPIRE);
1993 ieee80211_node_leave(ni);
1994 ieee80211_free_node(ni);
1995 vap->iv_stats.is_node_timeout++;
2002 * Aggressively reclaim resources. This should be used
2003 * only in a critical situation to reclaim mbuf resources.
2006 ieee80211_drain(struct ieee80211com *ic)
2008 struct ieee80211_node_table *nt = &ic->ic_sta;
2009 struct ieee80211vap *vap;
2010 struct ieee80211_node *ni;
2012 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) {
2014 * Ignore entries for which have yet to receive an
2015 * authentication frame. These are transient and
2016 * will be reclaimed when the last reference to them
2017 * goes away (when frame xmits complete).
2021 * Only process stations when in RUN state. This
2022 * insures, for example, that we don't timeout an
2023 * inactive station during CAC. Note that CSA state
2024 * is actually handled in ieee80211_node_timeout as
2025 * it applies to more than timeout processing.
2027 if (vap->iv_state != IEEE80211_S_RUN)
2029 /* XXX can vap be NULL? */
2030 if ((vap->iv_opmode == IEEE80211_M_HOSTAP ||
2031 vap->iv_opmode == IEEE80211_M_STA) &&
2032 (ni->ni_flags & IEEE80211_NODE_AREF) == 0)
2036 * XXX doesn't belong here, move to node_drain
2038 if (ni->ni_rxfrag[0] != NULL) {
2039 m_freem(ni->ni_rxfrag[0]);
2040 ni->ni_rxfrag[0] = NULL;
2043 * Drain resources held by the station.
2045 ic->ic_node_drain(ni);
2050 * Per-ieee80211com inactivity timer callback.
2053 ieee80211_node_timeout_callout(void *arg)
2055 struct ieee80211com *ic = arg;
2058 * Defer timeout processing if a channel switch is pending.
2059 * We typically need to be mute so not doing things that
2060 * might generate frames is good to handle in one place.
2061 * Supressing the station timeout processing may extend the
2062 * lifetime of inactive stations (by not decrementing their
2063 * idle counters) but this should be ok unless the CSA is
2064 * active for an unusually long time.
2066 wlan_serialize_enter();
2067 if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) {
2068 ieee80211_scan_timeout(ic);
2069 ieee80211_timeout_stations(ic);
2070 ieee80211_ageq_age(&ic->ic_stageq, IEEE80211_INACT_WAIT);
2072 ieee80211_erp_timeout(ic);
2073 ieee80211_ht_timeout(ic);
2075 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz,
2076 ieee80211_node_timeout_callout, ic);
2077 wlan_serialize_exit();
2081 ieee80211_iterate_nodes(struct ieee80211_node_table *nt,
2082 ieee80211_iter_func *f, void *arg)
2084 struct ieee80211_node *ni;
2087 gen = ++nt->nt_scangen;
2089 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) {
2090 if (ni->ni_scangen != gen) {
2091 ni->ni_scangen = gen;
2092 (void) ieee80211_ref_node(ni);
2094 ieee80211_free_node(ni);
2101 ieee80211_dump_node(struct ieee80211_node_table *nt, struct ieee80211_node *ni)
2103 kprintf("0x%p: mac %6D refcnt %d\n", ni, ni->ni_macaddr, ":",
2104 ieee80211_node_refcnt(ni));
2105 kprintf("\tscangen %u authmode %u flags 0x%x\n",
2106 ni->ni_scangen, ni->ni_authmode, ni->ni_flags);
2107 kprintf("\tassocid 0x%x txpower %u vlan %u\n",
2108 ni->ni_associd, ni->ni_txpower, ni->ni_vlan);
2109 kprintf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n",
2110 ni->ni_txseqs[IEEE80211_NONQOS_TID],
2111 ni->ni_rxseqs[IEEE80211_NONQOS_TID] >> IEEE80211_SEQ_SEQ_SHIFT,
2112 ni->ni_rxseqs[IEEE80211_NONQOS_TID] & IEEE80211_SEQ_FRAG_MASK,
2113 ni->ni_rxfragstamp);
2114 kprintf("\trssi %d noise %d intval %u capinfo 0x%x\n",
2115 node_getrssi(ni), ni->ni_noise,
2116 ni->ni_intval, ni->ni_capinfo);
2117 kprintf("\tbssid %6D essid \"%.*s\" channel %u:0x%x\n",
2119 ni->ni_esslen, ni->ni_essid,
2120 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags);
2121 kprintf("\tinact %u inact_reload %u txrate %u\n",
2122 ni->ni_inact, ni->ni_inact_reload, ni->ni_txrate);
2123 kprintf("\thtcap %x htparam %x htctlchan %u ht2ndchan %u\n",
2124 ni->ni_htcap, ni->ni_htparam,
2125 ni->ni_htctlchan, ni->ni_ht2ndchan);
2126 kprintf("\thtopmode %x htstbc %x chw %u\n",
2127 ni->ni_htopmode, ni->ni_htstbc, ni->ni_chw);
2131 ieee80211_dump_nodes(struct ieee80211_node_table *nt)
2133 ieee80211_iterate_nodes(nt,
2134 (ieee80211_iter_func *) ieee80211_dump_node, nt);
2138 ieee80211_notify_erp_locked(struct ieee80211com *ic)
2140 struct ieee80211vap *vap;
2142 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
2143 if (vap->iv_opmode == IEEE80211_M_HOSTAP)
2144 ieee80211_beacon_notify(vap, IEEE80211_BEACON_ERP);
2148 ieee80211_notify_erp(struct ieee80211com *ic)
2150 ieee80211_notify_erp_locked(ic);
2154 * Handle a station joining an 11g network.
2157 ieee80211_node_join_11g(struct ieee80211_node *ni)
2159 struct ieee80211com *ic = ni->ni_ic;
2162 * Station isn't capable of short slot time. Bump
2163 * the count of long slot time stations and disable
2164 * use of short slot time. Note that the actual switch
2165 * over to long slot time use may not occur until the
2166 * next beacon transmission (per sec. 7.3.1.4 of 11g).
2168 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) {
2169 ic->ic_longslotsta++;
2170 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2171 "station needs long slot time, count %d",
2172 ic->ic_longslotsta);
2173 /* XXX vap's w/ conflicting needs won't work */
2174 if (!IEEE80211_IS_CHAN_108G(ic->ic_bsschan)) {
2176 * Don't force slot time when switched to turbo
2177 * mode as non-ERP stations won't be present; this
2178 * need only be done when on the normal G channel.
2180 ieee80211_set_shortslottime(ic, 0);
2184 * If the new station is not an ERP station
2185 * then bump the counter and enable protection
2188 if (!ieee80211_iserp_rateset(&ni->ni_rates)) {
2190 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2191 "station is !ERP, %d non-ERP stations associated",
2194 * If station does not support short preamble
2195 * then we must enable use of Barker preamble.
2197 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) {
2198 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2199 "%s", "station needs long preamble");
2200 ic->ic_flags |= IEEE80211_F_USEBARKER;
2201 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE;
2204 * If protection is configured and this is the first
2205 * indication we should use protection, enable it.
2207 if (ic->ic_protmode != IEEE80211_PROT_NONE &&
2208 ic->ic_nonerpsta == 1 &&
2209 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) {
2210 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC,
2211 "%s: enable use of protection\n", __func__);
2212 ic->ic_flags |= IEEE80211_F_USEPROT;
2213 ieee80211_notify_erp_locked(ic);
2216 ni->ni_flags |= IEEE80211_NODE_ERP;
2220 ieee80211_node_join(struct ieee80211_node *ni, int resp)
2222 struct ieee80211com *ic = ni->ni_ic;
2223 struct ieee80211vap *vap = ni->ni_vap;
2226 if (ni->ni_associd == 0) {
2229 KASSERT(vap->iv_aid_bitmap != NULL, ("no aid bitmap"));
2231 * It would be good to search the bitmap
2232 * more efficiently, but this will do for now.
2234 for (aid = 1; aid < vap->iv_max_aid; aid++) {
2235 if (!IEEE80211_AID_ISSET(vap, aid))
2238 if (aid >= vap->iv_max_aid) {
2239 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_TOOMANY);
2240 ieee80211_node_leave(ni);
2243 ni->ni_associd = aid | 0xc000;
2244 ni->ni_jointime = time_second;
2245 IEEE80211_AID_SET(vap, ni->ni_associd);
2246 vap->iv_sta_assoc++;
2249 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan))
2250 ieee80211_ht_node_join(ni);
2251 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) &&
2252 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan))
2253 ieee80211_node_join_11g(ni);
2259 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni,
2260 "station associated at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s",
2261 IEEE80211_NODE_AID(ni),
2262 ic->ic_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long",
2263 ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long",
2264 ic->ic_flags & IEEE80211_F_USEPROT ? ", protection" : "",
2265 ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "",
2266 ni->ni_flags & IEEE80211_NODE_HT ?
2267 (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "",
2268 ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "",
2269 ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" :
2270 ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "",
2271 ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "",
2272 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ?
2273 ", fast-frames" : "",
2274 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ?
2278 ieee80211_node_setuptxparms(ni);
2279 /* give driver a chance to setup state like ni_txrate */
2280 if (ic->ic_newassoc != NULL)
2281 ic->ic_newassoc(ni, newassoc);
2282 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_SUCCESS);
2283 /* tell the authenticator about new station */
2284 if (vap->iv_auth->ia_node_join != NULL)
2285 vap->iv_auth->ia_node_join(ni);
2286 ieee80211_notify_node_join(ni,
2287 resp == IEEE80211_FC0_SUBTYPE_ASSOC_RESP);
2291 disable_protection(struct ieee80211com *ic)
2293 KASSERT(ic->ic_nonerpsta == 0 &&
2294 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0,
2295 ("%d non ERP stations, flags 0x%x", ic->ic_nonerpsta,
2298 ic->ic_flags &= ~IEEE80211_F_USEPROT;
2299 /* XXX verify mode? */
2300 if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) {
2301 ic->ic_flags |= IEEE80211_F_SHPREAMBLE;
2302 ic->ic_flags &= ~IEEE80211_F_USEBARKER;
2304 ieee80211_notify_erp_locked(ic);
2308 * Handle a station leaving an 11g network.
2311 ieee80211_node_leave_11g(struct ieee80211_node *ni)
2313 struct ieee80211com *ic = ni->ni_ic;
2315 KASSERT(IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan),
2316 ("not in 11g, bss %u:0x%x", ic->ic_bsschan->ic_freq,
2317 ic->ic_bsschan->ic_flags));
2320 * If a long slot station do the slot time bookkeeping.
2322 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) {
2323 KASSERT(ic->ic_longslotsta > 0,
2324 ("bogus long slot station count %d", ic->ic_longslotsta));
2325 ic->ic_longslotsta--;
2326 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2327 "long slot time station leaves, count now %d",
2328 ic->ic_longslotsta);
2329 if (ic->ic_longslotsta == 0) {
2331 * Re-enable use of short slot time if supported
2332 * and not operating in IBSS mode (per spec).
2334 if ((ic->ic_caps & IEEE80211_C_SHSLOT) &&
2335 ic->ic_opmode != IEEE80211_M_IBSS) {
2336 IEEE80211_DPRINTF(ni->ni_vap,
2337 IEEE80211_MSG_ASSOC,
2338 "%s: re-enable use of short slot time\n",
2340 ieee80211_set_shortslottime(ic, 1);
2345 * If a non-ERP station do the protection-related bookkeeping.
2347 if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) {
2348 KASSERT(ic->ic_nonerpsta > 0,
2349 ("bogus non-ERP station count %d", ic->ic_nonerpsta));
2351 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2352 "non-ERP station leaves, count now %d%s", ic->ic_nonerpsta,
2353 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) ?
2354 " (non-ERP sta present)" : "");
2355 if (ic->ic_nonerpsta == 0 &&
2356 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) {
2357 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC,
2358 "%s: disable use of protection\n", __func__);
2359 disable_protection(ic);
2365 * Time out presence of an overlapping bss with non-ERP
2366 * stations. When operating in hostap mode we listen for
2367 * beacons from other stations and if we identify a non-ERP
2368 * station is present we enable protection. To identify
2369 * when all non-ERP stations are gone we time out this
2373 ieee80211_erp_timeout(struct ieee80211com *ic)
2375 if ((ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) &&
2376 time_after(ticks, ic->ic_lastnonerp + IEEE80211_NONERP_PRESENT_AGE)) {
2378 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni,
2379 "%s", "age out non-ERP sta present on channel");
2381 ic->ic_flags_ext &= ~IEEE80211_FEXT_NONERP_PR;
2382 if (ic->ic_nonerpsta == 0)
2383 disable_protection(ic);
2388 * Handle bookkeeping for station deauthentication/disassociation
2389 * when operating as an ap.
2392 ieee80211_node_leave(struct ieee80211_node *ni)
2394 struct ieee80211com *ic = ni->ni_ic;
2395 struct ieee80211vap *vap = ni->ni_vap;
2396 struct ieee80211_node_table *nt = ni->ni_table;
2398 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni,
2399 "station with aid %d leaves", IEEE80211_NODE_AID(ni));
2401 KASSERT(vap->iv_opmode != IEEE80211_M_STA,
2402 ("unexpected operating mode %u", vap->iv_opmode));
2404 * If node wasn't previously associated all
2405 * we need to do is reclaim the reference.
2407 /* XXX ibss mode bypasses 11g and notification */
2408 if (ni->ni_associd == 0)
2411 * Tell the authenticator the station is leaving.
2412 * Note that we must do this before yanking the
2413 * association id as the authenticator uses the
2414 * associd to locate it's state block.
2416 if (vap->iv_auth->ia_node_leave != NULL)
2417 vap->iv_auth->ia_node_leave(ni);
2419 IEEE80211_AID_CLR(vap, ni->ni_associd);
2421 vap->iv_sta_assoc--;
2424 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan))
2425 ieee80211_ht_node_leave(ni);
2426 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) &&
2427 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan))
2428 ieee80211_node_leave_11g(ni);
2430 * Cleanup station state. In particular clear various
2431 * state that might otherwise be reused if the node
2432 * is reused before the reference count goes to zero
2433 * (and memory is reclaimed).
2435 ieee80211_sta_leave(ni);
2438 * Remove the node from any table it's recorded in and
2439 * drop the caller's reference. Removal from the table
2440 * is important to insure the node is not reprocessed
2444 node_reclaim(nt, ni);
2446 ieee80211_free_node(ni);
2450 struct ieee80211vap *vap;
2452 uint32_t rssi_total;
2456 get_hostap_rssi(void *arg, struct ieee80211_node *ni)
2458 struct rssiinfo *info = arg;
2459 struct ieee80211vap *vap = ni->ni_vap;
2462 if (info->vap != vap)
2464 /* only associated stations */
2465 if (ni->ni_associd == 0)
2467 rssi = vap->iv_ic->ic_node_getrssi(ni);
2469 info->rssi_samples++;
2470 info->rssi_total += rssi;
2475 get_adhoc_rssi(void *arg, struct ieee80211_node *ni)
2477 struct rssiinfo *info = arg;
2478 struct ieee80211vap *vap = ni->ni_vap;
2481 if (info->vap != vap)
2483 /* only neighbors */
2484 /* XXX check bssid */
2485 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0)
2487 rssi = vap->iv_ic->ic_node_getrssi(ni);
2489 info->rssi_samples++;
2490 info->rssi_total += rssi;
2494 #ifdef IEEE80211_SUPPORT_MESH
2496 get_mesh_rssi(void *arg, struct ieee80211_node *ni)
2498 struct rssiinfo *info = arg;
2499 struct ieee80211vap *vap = ni->ni_vap;
2502 if (info->vap != vap)
2504 /* only neighbors that peered successfully */
2505 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED)
2507 rssi = vap->iv_ic->ic_node_getrssi(ni);
2509 info->rssi_samples++;
2510 info->rssi_total += rssi;
2513 #endif /* IEEE80211_SUPPORT_MESH */
2516 ieee80211_getrssi(struct ieee80211vap *vap)
2518 #define NZ(x) ((x) == 0 ? 1 : (x))
2519 struct ieee80211com *ic = vap->iv_ic;
2520 struct rssiinfo info;
2522 info.rssi_total = 0;
2523 info.rssi_samples = 0;
2525 switch (vap->iv_opmode) {
2526 case IEEE80211_M_IBSS: /* average of all ibss neighbors */
2527 case IEEE80211_M_AHDEMO: /* average of all neighbors */
2528 ieee80211_iterate_nodes(&ic->ic_sta, get_adhoc_rssi, &info);
2530 case IEEE80211_M_HOSTAP: /* average of all associated stations */
2531 ieee80211_iterate_nodes(&ic->ic_sta, get_hostap_rssi, &info);
2533 #ifdef IEEE80211_SUPPORT_MESH
2534 case IEEE80211_M_MBSS: /* average of all mesh neighbors */
2535 ieee80211_iterate_nodes(&ic->ic_sta, get_mesh_rssi, &info);
2538 case IEEE80211_M_MONITOR: /* XXX */
2539 case IEEE80211_M_STA: /* use stats from associated ap */
2541 if (vap->iv_bss != NULL)
2542 info.rssi_total = ic->ic_node_getrssi(vap->iv_bss);
2543 info.rssi_samples = 1;
2546 return info.rssi_total / NZ(info.rssi_samples);
2551 ieee80211_getsignal(struct ieee80211vap *vap, int8_t *rssi, int8_t *noise)
2554 if (vap->iv_bss == NULL) /* NB: shouldn't happen */
2556 vap->iv_ic->ic_node_getsignal(vap->iv_bss, rssi, noise);
2557 /* for non-station mode return avg'd rssi accounting */
2558 if (vap->iv_opmode != IEEE80211_M_STA)
2559 *rssi = ieee80211_getrssi(vap);