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>
57 * Association id's are managed with a bit vector.
59 #define IEEE80211_AID_SET(_vap, b) \
60 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] |= \
61 (1 << (IEEE80211_AID(b) % 32)))
62 #define IEEE80211_AID_CLR(_vap, b) \
63 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] &= \
64 ~(1 << (IEEE80211_AID(b) % 32)))
65 #define IEEE80211_AID_ISSET(_vap, b) \
66 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] & (1 << (IEEE80211_AID(b) % 32)))
68 #ifdef IEEE80211_DEBUG_REFCNT
69 #define REFCNT_LOC "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line
71 #define REFCNT_LOC "%s %p<%s> refcnt %d\n", __func__
74 static int ieee80211_sta_join1(struct ieee80211_node *);
76 static struct ieee80211_node *node_alloc(struct ieee80211vap *,
77 const uint8_t [IEEE80211_ADDR_LEN]);
78 static void node_cleanup(struct ieee80211_node *);
79 static void node_free(struct ieee80211_node *);
80 static void node_age(struct ieee80211_node *);
81 static int8_t node_getrssi(const struct ieee80211_node *);
82 static void node_getsignal(const struct ieee80211_node *, int8_t *, int8_t *);
83 static void node_getmimoinfo(const struct ieee80211_node *,
84 struct ieee80211_mimo_info *);
86 static void _ieee80211_free_node(struct ieee80211_node *);
88 static void ieee80211_node_table_init(struct ieee80211com *ic,
89 struct ieee80211_node_table *nt, const char *name,
90 int inact, int keymaxix);
91 static void ieee80211_node_table_reset(struct ieee80211_node_table *,
92 struct ieee80211vap *);
93 static void ieee80211_node_table_cleanup(struct ieee80211_node_table *nt);
94 static void ieee80211_erp_timeout(struct ieee80211com *);
96 MALLOC_DEFINE(M_80211_NODE, "80211node", "802.11 node state");
97 MALLOC_DEFINE(M_80211_NODE_IE, "80211nodeie", "802.11 node ie");
100 ieee80211_node_attach(struct ieee80211com *ic)
102 ieee80211_node_table_init(ic, &ic->ic_sta, "station",
103 IEEE80211_INACT_INIT, ic->ic_max_keyix);
104 callout_init(&ic->ic_inact, CALLOUT_MPSAFE);
105 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz,
106 ieee80211_node_timeout, ic);
108 ic->ic_node_alloc = node_alloc;
109 ic->ic_node_free = node_free;
110 ic->ic_node_cleanup = node_cleanup;
111 ic->ic_node_age = node_age;
112 ic->ic_node_drain = node_age; /* NB: same as age */
113 ic->ic_node_getrssi = node_getrssi;
114 ic->ic_node_getsignal = node_getsignal;
115 ic->ic_node_getmimoinfo = node_getmimoinfo;
118 * Set flags to be propagated to all vap's;
119 * these define default behaviour/configuration.
121 ic->ic_flags_ext |= IEEE80211_FEXT_INACT; /* inactivity processing */
125 ieee80211_node_detach(struct ieee80211com *ic)
128 callout_drain(&ic->ic_inact);
129 ieee80211_node_table_cleanup(&ic->ic_sta);
133 ieee80211_node_vattach(struct ieee80211vap *vap)
135 /* NB: driver can override */
136 vap->iv_max_aid = IEEE80211_AID_DEF;
138 /* default station inactivity timer setings */
139 vap->iv_inact_init = IEEE80211_INACT_INIT;
140 vap->iv_inact_auth = IEEE80211_INACT_AUTH;
141 vap->iv_inact_run = IEEE80211_INACT_RUN;
142 vap->iv_inact_probe = IEEE80211_INACT_PROBE;
144 IEEE80211_DPRINTF(vap, IEEE80211_MSG_INACT,
145 "%s: init %u auth %u run %u probe %u\n", __func__,
146 vap->iv_inact_init, vap->iv_inact_auth,
147 vap->iv_inact_run, vap->iv_inact_probe);
151 ieee80211_node_latevattach(struct ieee80211vap *vap)
153 if (vap->iv_opmode == IEEE80211_M_HOSTAP) {
154 /* XXX should we allow max aid to be zero? */
155 if (vap->iv_max_aid < IEEE80211_AID_MIN) {
156 vap->iv_max_aid = IEEE80211_AID_MIN;
157 if_printf(vap->iv_ifp,
158 "WARNING: max aid too small, changed to %d\n",
161 vap->iv_aid_bitmap = (uint32_t *) malloc(
162 howmany(vap->iv_max_aid, 32) * sizeof(uint32_t),
163 M_80211_NODE, M_NOWAIT | M_ZERO);
164 if (vap->iv_aid_bitmap == NULL) {
165 /* XXX no way to recover */
166 printf("%s: no memory for AID bitmap, max aid %d!\n",
167 __func__, vap->iv_max_aid);
172 ieee80211_reset_bss(vap);
174 vap->iv_auth = ieee80211_authenticator_get(vap->iv_bss->ni_authmode);
178 ieee80211_node_vdetach(struct ieee80211vap *vap)
180 struct ieee80211com *ic = vap->iv_ic;
182 ieee80211_node_table_reset(&ic->ic_sta, vap);
183 if (vap->iv_bss != NULL) {
184 ieee80211_free_node(vap->iv_bss);
187 if (vap->iv_aid_bitmap != NULL) {
188 free(vap->iv_aid_bitmap, M_80211_NODE);
189 vap->iv_aid_bitmap = NULL;
194 * Port authorize/unauthorize interfaces for use by an authenticator.
198 ieee80211_node_authorize(struct ieee80211_node *ni)
200 struct ieee80211vap *vap = ni->ni_vap;
202 ni->ni_flags |= IEEE80211_NODE_AUTH;
203 ni->ni_inact_reload = vap->iv_inact_run;
204 ni->ni_inact = ni->ni_inact_reload;
206 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni,
207 "%s: inact_reload %u", __func__, ni->ni_inact_reload);
211 ieee80211_node_unauthorize(struct ieee80211_node *ni)
213 struct ieee80211vap *vap = ni->ni_vap;
215 ni->ni_flags &= ~IEEE80211_NODE_AUTH;
216 ni->ni_inact_reload = vap->iv_inact_auth;
217 if (ni->ni_inact > ni->ni_inact_reload)
218 ni->ni_inact = ni->ni_inact_reload;
220 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni,
221 "%s: inact_reload %u inact %u", __func__,
222 ni->ni_inact_reload, ni->ni_inact);
226 * Fix tx parameters for a node according to ``association state''.
229 node_setuptxparms(struct ieee80211_node *ni)
231 struct ieee80211vap *vap = ni->ni_vap;
232 enum ieee80211_phymode mode;
234 if (ni->ni_flags & IEEE80211_NODE_HT) {
235 if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan))
236 mode = IEEE80211_MODE_11NA;
238 mode = IEEE80211_MODE_11NG;
239 } else { /* legacy rate handling */
240 if (IEEE80211_IS_CHAN_ST(ni->ni_chan))
241 mode = IEEE80211_MODE_STURBO_A;
242 else if (IEEE80211_IS_CHAN_HALF(ni->ni_chan))
243 mode = IEEE80211_MODE_HALF;
244 else if (IEEE80211_IS_CHAN_QUARTER(ni->ni_chan))
245 mode = IEEE80211_MODE_QUARTER;
246 /* NB: 108A should be handled as 11a */
247 else if (IEEE80211_IS_CHAN_A(ni->ni_chan))
248 mode = IEEE80211_MODE_11A;
249 else if (IEEE80211_IS_CHAN_108G(ni->ni_chan) ||
250 (ni->ni_flags & IEEE80211_NODE_ERP))
251 mode = IEEE80211_MODE_11G;
253 mode = IEEE80211_MODE_11B;
255 ni->ni_txparms = &vap->iv_txparms[mode];
259 * Set/change the channel. The rate set is also updated as
260 * to insure a consistent view by drivers.
261 * XXX should be private but hostap needs it to deal with CSA
264 ieee80211_node_set_chan(struct ieee80211_node *ni,
265 struct ieee80211_channel *chan)
267 struct ieee80211com *ic = ni->ni_ic;
268 struct ieee80211vap *vap = ni->ni_vap;
269 enum ieee80211_phymode mode;
271 KASSERT(chan != IEEE80211_CHAN_ANYC, ("no channel"));
274 mode = ieee80211_chan2mode(chan);
275 if (IEEE80211_IS_CHAN_HT(chan)) {
277 * XXX Gotta be careful here; the rate set returned by
278 * ieee80211_get_suprates is actually any HT rate
279 * set so blindly copying it will be bad. We must
280 * install the legacy rate est in ni_rates and the
281 * HT rate set in ni_htrates.
283 ni->ni_htrates = *ieee80211_get_suphtrates(ic, chan);
285 * Setup bss tx parameters based on operating mode. We
286 * use legacy rates when operating in a mixed HT+non-HT bss
287 * and non-ERP rates in 11g for mixed ERP+non-ERP bss.
289 if (mode == IEEE80211_MODE_11NA &&
290 (vap->iv_flags_ext & IEEE80211_FEXT_PUREN) == 0)
291 mode = IEEE80211_MODE_11A;
292 else if (mode == IEEE80211_MODE_11NG &&
293 (vap->iv_flags_ext & IEEE80211_FEXT_PUREN) == 0)
294 mode = IEEE80211_MODE_11G;
295 if (mode == IEEE80211_MODE_11G &&
296 (vap->iv_flags & IEEE80211_F_PUREG) == 0)
297 mode = IEEE80211_MODE_11B;
299 ni->ni_txparms = &vap->iv_txparms[mode];
300 ni->ni_rates = *ieee80211_get_suprates(ic, chan);
304 copy_bss(struct ieee80211_node *nbss, const struct ieee80211_node *obss)
306 /* propagate useful state */
307 nbss->ni_authmode = obss->ni_authmode;
308 nbss->ni_txpower = obss->ni_txpower;
309 nbss->ni_vlan = obss->ni_vlan;
310 /* XXX statistics? */
311 /* XXX legacy WDS bssid? */
315 ieee80211_create_ibss(struct ieee80211vap* vap, struct ieee80211_channel *chan)
317 struct ieee80211com *ic = vap->iv_ic;
318 struct ieee80211_node *ni;
320 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN,
321 "%s: creating ibss on channel %u\n", __func__,
322 ieee80211_chan2ieee(ic, chan));
324 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr);
329 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr);
330 ni->ni_esslen = vap->iv_des_ssid[0].len;
331 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen);
332 if (vap->iv_bss != NULL)
333 copy_bss(ni, vap->iv_bss);
334 ni->ni_intval = ic->ic_bintval;
335 if (vap->iv_flags & IEEE80211_F_PRIVACY)
336 ni->ni_capinfo |= IEEE80211_CAPINFO_PRIVACY;
337 if (ic->ic_phytype == IEEE80211_T_FH) {
338 ni->ni_fhdwell = 200; /* XXX */
341 if (vap->iv_opmode == IEEE80211_M_IBSS) {
342 vap->iv_flags |= IEEE80211_F_SIBSS;
343 ni->ni_capinfo |= IEEE80211_CAPINFO_IBSS; /* XXX */
344 if (vap->iv_flags & IEEE80211_F_DESBSSID)
345 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid);
347 get_random_bytes(ni->ni_bssid, IEEE80211_ADDR_LEN);
348 /* clear group bit, add local bit */
349 ni->ni_bssid[0] = (ni->ni_bssid[0] &~ 0x01) | 0x02;
351 } else if (vap->iv_opmode == IEEE80211_M_AHDEMO) {
352 if (vap->iv_flags & IEEE80211_F_DESBSSID)
353 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid);
355 #ifdef IEEE80211_SUPPORT_TDMA
356 if ((vap->iv_caps & IEEE80211_C_TDMA) == 0)
358 memset(ni->ni_bssid, 0, IEEE80211_ADDR_LEN);
361 * Fix the channel and related attributes.
363 /* clear DFS CAC state on previous channel */
364 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC &&
365 ic->ic_bsschan->ic_freq != chan->ic_freq &&
366 IEEE80211_IS_CHAN_CACDONE(ic->ic_bsschan))
367 ieee80211_dfs_cac_clear(ic, ic->ic_bsschan);
368 ic->ic_bsschan = chan;
369 ieee80211_node_set_chan(ni, chan);
370 ic->ic_curmode = ieee80211_chan2mode(chan);
372 * Do mode-specific setup.
374 if (IEEE80211_IS_CHAN_FULL(chan)) {
375 if (IEEE80211_IS_CHAN_ANYG(chan)) {
377 * Use a mixed 11b/11g basic rate set.
379 ieee80211_setbasicrates(&ni->ni_rates,
381 if (vap->iv_flags & IEEE80211_F_PUREG) {
383 * Also mark OFDM rates basic so 11b
384 * stations do not join (WiFi compliance).
386 ieee80211_addbasicrates(&ni->ni_rates,
389 } else if (IEEE80211_IS_CHAN_B(chan)) {
391 * Force pure 11b rate set.
393 ieee80211_setbasicrates(&ni->ni_rates,
398 (void) ieee80211_sta_join1(ieee80211_ref_node(ni));
402 * Reset bss state on transition to the INIT state.
403 * Clear any stations from the table (they have been
404 * deauth'd) and reset the bss node (clears key, rate
408 ieee80211_reset_bss(struct ieee80211vap *vap)
410 struct ieee80211com *ic = vap->iv_ic;
411 struct ieee80211_node *ni, *obss;
413 ieee80211_node_table_reset(&ic->ic_sta, vap);
414 /* XXX multi-bss: wrong */
415 ieee80211_reset_erp(ic);
417 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr);
418 KASSERT(ni != NULL, ("unable to setup inital BSS node"));
420 vap->iv_bss = ieee80211_ref_node(ni);
423 ni->ni_intval = ic->ic_bintval;
424 ieee80211_free_node(obss);
426 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr);
430 match_ssid(const struct ieee80211_node *ni,
431 int nssid, const struct ieee80211_scan_ssid ssids[])
435 for (i = 0; i < nssid; i++) {
436 if (ni->ni_esslen == ssids[i].len &&
437 memcmp(ni->ni_essid, ssids[i].ssid, ni->ni_esslen) == 0)
444 * Test a node for suitability/compatibility.
447 check_bss(struct ieee80211vap *vap, struct ieee80211_node *ni)
449 struct ieee80211com *ic = ni->ni_ic;
452 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan)))
454 if (vap->iv_opmode == IEEE80211_M_IBSS) {
455 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0)
458 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0)
461 if (vap->iv_flags & IEEE80211_F_PRIVACY) {
462 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0)
465 /* XXX does this mean privacy is supported or required? */
466 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY)
469 rate = ieee80211_fix_rate(ni, &ni->ni_rates,
470 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE);
471 if (rate & IEEE80211_RATE_BASIC)
473 if (vap->iv_des_nssid != 0 &&
474 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid))
476 if ((vap->iv_flags & IEEE80211_F_DESBSSID) &&
477 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid))
482 #ifdef IEEE80211_DEBUG
484 * Display node suitability/compatibility.
487 check_bss_debug(struct ieee80211vap *vap, struct ieee80211_node *ni)
489 struct ieee80211com *ic = ni->ni_ic;
494 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan)))
496 if (vap->iv_opmode == IEEE80211_M_IBSS) {
497 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0)
500 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0)
503 if (vap->iv_flags & IEEE80211_F_PRIVACY) {
504 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0)
507 /* XXX does this mean privacy is supported or required? */
508 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY)
511 rate = ieee80211_fix_rate(ni, &ni->ni_rates,
512 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE);
513 if (rate & IEEE80211_RATE_BASIC)
515 if (vap->iv_des_nssid != 0 &&
516 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid))
518 if ((vap->iv_flags & IEEE80211_F_DESBSSID) &&
519 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid))
522 printf(" %c %s", fail ? '-' : '+', ether_sprintf(ni->ni_macaddr));
523 printf(" %s%c", ether_sprintf(ni->ni_bssid), fail & 0x20 ? '!' : ' ');
525 ieee80211_chan2ieee(ic, ni->ni_chan), fail & 0x01 ? '!' : ' ');
526 printf(" %2dM%c", (rate & IEEE80211_RATE_VAL) / 2,
527 fail & 0x08 ? '!' : ' ');
529 (ni->ni_capinfo & IEEE80211_CAPINFO_ESS) ? "ess" :
530 (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) ? "ibss" :
532 fail & 0x02 ? '!' : ' ');
534 (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) ? "wep" : "no",
535 fail & 0x04 ? '!' : ' ');
536 ieee80211_print_essid(ni->ni_essid, ni->ni_esslen);
537 printf("%s\n", fail & 0x10 ? "!" : "");
539 #endif /* IEEE80211_DEBUG */
542 * Handle 802.11 ad hoc network merge. The
543 * convention, set by the Wireless Ethernet Compatibility Alliance
544 * (WECA), is that an 802.11 station will change its BSSID to match
545 * the "oldest" 802.11 ad hoc network, on the same channel, that
546 * has the station's desired SSID. The "oldest" 802.11 network
547 * sends beacons with the greatest TSF timestamp.
549 * The caller is assumed to validate TSF's before attempting a merge.
551 * Return !0 if the BSSID changed, 0 otherwise.
554 ieee80211_ibss_merge(struct ieee80211_node *ni)
556 struct ieee80211vap *vap = ni->ni_vap;
557 #ifdef IEEE80211_DEBUG
558 struct ieee80211com *ic = ni->ni_ic;
561 if (ni == vap->iv_bss ||
562 IEEE80211_ADDR_EQ(ni->ni_bssid, vap->iv_bss->ni_bssid)) {
563 /* unchanged, nothing to do */
566 if (!check_bss(vap, ni)) {
567 /* capabilities mismatch */
568 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC,
569 "%s: merge failed, capabilities mismatch\n", __func__);
570 #ifdef IEEE80211_DEBUG
571 if (ieee80211_msg_assoc(vap))
572 check_bss_debug(vap, ni);
574 vap->iv_stats.is_ibss_capmismatch++;
577 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC,
578 "%s: new bssid %s: %s preamble, %s slot time%s\n", __func__,
579 ether_sprintf(ni->ni_bssid),
580 ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long",
581 ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long",
582 ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : ""
584 return ieee80211_sta_join1(ieee80211_ref_node(ni));
588 * Calculate HT channel promotion flags for all vaps.
589 * This assumes ni_chan have been setup for each vap.
592 gethtadjustflags(struct ieee80211com *ic)
594 struct ieee80211vap *vap;
599 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
600 if (vap->iv_state < IEEE80211_S_RUN)
602 switch (vap->iv_opmode) {
603 case IEEE80211_M_WDS:
604 case IEEE80211_M_STA:
605 case IEEE80211_M_AHDEMO:
606 case IEEE80211_M_HOSTAP:
607 case IEEE80211_M_IBSS:
608 flags |= ieee80211_htchanflags(vap->iv_bss->ni_chan);
618 * Check if the current channel needs to change based on whether
619 * any vap's are using HT20/HT40. This is used to sync the state
620 * of ic_curchan after a channel width change on a running vap.
623 ieee80211_sync_curchan(struct ieee80211com *ic)
625 struct ieee80211_channel *c;
627 c = ieee80211_ht_adjust_channel(ic, ic->ic_curchan, gethtadjustflags(ic));
628 if (c != ic->ic_curchan) {
630 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan);
631 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan);
632 ic->ic_set_channel(ic);
637 * Change the current channel. The request channel may be
638 * promoted if other vap's are operating with HT20/HT40.
641 ieee80211_setcurchan(struct ieee80211com *ic, struct ieee80211_channel *c)
643 if (ic->ic_htcaps & IEEE80211_HTC_HT) {
644 int flags = gethtadjustflags(ic);
646 * Check for channel promotion required to support the
647 * set of running vap's. This assumes we are called
648 * after ni_chan is setup for each vap.
650 /* NB: this assumes IEEE80211_FEXT_USEHT40 > IEEE80211_FEXT_HT */
651 if (flags > ieee80211_htchanflags(c))
652 c = ieee80211_ht_adjust_channel(ic, c, flags);
654 ic->ic_bsschan = ic->ic_curchan = c;
655 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan);
656 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan);
657 ic->ic_set_channel(ic);
661 * Join the specified IBSS/BSS network. The node is assumed to
662 * be passed in with a held reference.
665 ieee80211_sta_join1(struct ieee80211_node *selbs)
667 struct ieee80211vap *vap = selbs->ni_vap;
668 struct ieee80211com *ic = selbs->ni_ic;
669 struct ieee80211_node *obss;
673 * Committed to selbs, setup state.
677 * Check if old+new node have the same address in which
678 * case we can reassociate when operating in sta mode.
680 canreassoc = (obss != NULL &&
681 vap->iv_state == IEEE80211_S_RUN &&
682 IEEE80211_ADDR_EQ(obss->ni_macaddr, selbs->ni_macaddr));
683 vap->iv_bss = selbs; /* NB: caller assumed to bump refcnt */
685 copy_bss(selbs, obss);
686 ieee80211_node_decref(obss); /* iv_bss reference */
687 ieee80211_free_node(obss); /* station table reference */
688 obss = NULL; /* NB: guard against later use */
692 * Delete unusable rates; we've already checked
693 * that the negotiated rate set is acceptable.
695 ieee80211_fix_rate(vap->iv_bss, &vap->iv_bss->ni_rates,
696 IEEE80211_F_DODEL | IEEE80211_F_JOIN);
698 ieee80211_setcurchan(ic, selbs->ni_chan);
700 * Set the erp state (mostly the slot time) to deal with
701 * the auto-select case; this should be redundant if the
704 ieee80211_reset_erp(ic);
705 ieee80211_wme_initparams(vap);
707 if (vap->iv_opmode == IEEE80211_M_STA) {
710 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 1);
713 * Act as if we received a DEAUTH frame in case we
714 * are invoked from the RUN state. This will cause
715 * us to try to re-authenticate if we are operating
718 ieee80211_new_state(vap, IEEE80211_S_AUTH,
719 IEEE80211_FC0_SUBTYPE_DEAUTH);
722 ieee80211_new_state(vap, IEEE80211_S_RUN, -1);
727 ieee80211_sta_join(struct ieee80211vap *vap, struct ieee80211_channel *chan,
728 const struct ieee80211_scan_entry *se)
730 struct ieee80211com *ic = vap->iv_ic;
731 struct ieee80211_node *ni;
733 ni = ieee80211_alloc_node(&ic->ic_sta, vap, se->se_macaddr);
739 * Expand scan state into node's format.
740 * XXX may not need all this stuff
742 IEEE80211_ADDR_COPY(ni->ni_bssid, se->se_bssid);
743 ni->ni_esslen = se->se_ssid[1];
744 memcpy(ni->ni_essid, se->se_ssid+2, ni->ni_esslen);
745 ni->ni_rstamp = se->se_rstamp;
746 ni->ni_tstamp.tsf = se->se_tstamp.tsf;
747 ni->ni_intval = se->se_intval;
748 ni->ni_capinfo = se->se_capinfo;
750 ni->ni_timoff = se->se_timoff;
751 ni->ni_fhdwell = se->se_fhdwell;
752 ni->ni_fhindex = se->se_fhindex;
753 ni->ni_erp = se->se_erp;
754 IEEE80211_RSSI_LPF(ni->ni_avgrssi, se->se_rssi);
755 ni->ni_noise = se->se_noise;
756 if (vap->iv_opmode == IEEE80211_M_STA) {
757 /* NB: only infrastructure mode requires an associd */
758 ni->ni_flags |= IEEE80211_NODE_ASSOCID;
761 if (ieee80211_ies_init(&ni->ni_ies, se->se_ies.data, se->se_ies.len)) {
762 ieee80211_ies_expand(&ni->ni_ies);
763 #ifdef IEEE80211_SUPPORT_SUPERG
764 if (ni->ni_ies.ath_ie != NULL)
765 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie);
767 if (ni->ni_ies.htcap_ie != NULL)
768 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie);
769 if (ni->ni_ies.htinfo_ie != NULL)
770 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie);
771 #ifdef IEEE80211_SUPPORT_TDMA
772 if (ni->ni_ies.tdma_ie != NULL)
773 ieee80211_parse_tdma(ni, ni->ni_ies.tdma_ie);
777 vap->iv_dtim_period = se->se_dtimperiod;
778 vap->iv_dtim_count = 0;
780 /* NB: must be after ni_chan is setup */
781 ieee80211_setup_rates(ni, se->se_rates, se->se_xrates,
783 if (ieee80211_iserp_rateset(&ni->ni_rates))
784 ni->ni_flags |= IEEE80211_NODE_ERP;
785 node_setuptxparms(ni);
787 return ieee80211_sta_join1(ieee80211_ref_node(ni));
791 * Leave the specified IBSS/BSS network. The node is assumed to
792 * be passed in with a held reference.
795 ieee80211_sta_leave(struct ieee80211_node *ni)
797 struct ieee80211com *ic = ni->ni_ic;
799 ic->ic_node_cleanup(ni);
800 ieee80211_notify_node_leave(ni);
804 * Send a deauthenticate frame and drop the station.
807 ieee80211_node_deauth(struct ieee80211_node *ni, int reason)
809 /* NB: bump the refcnt to be sure temporay nodes are not reclaimed */
810 ieee80211_ref_node(ni);
811 if (ni->ni_associd != 0)
812 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH, reason);
813 ieee80211_node_leave(ni);
814 ieee80211_free_node(ni);
817 static struct ieee80211_node *
818 node_alloc(struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN])
820 struct ieee80211_node *ni;
822 ni = (struct ieee80211_node *) malloc(sizeof(struct ieee80211_node),
823 M_80211_NODE, M_NOWAIT | M_ZERO);
828 * Initialize an ie blob with the specified data. If previous
829 * data exists re-use the data block. As a side effect we clear
830 * all references to specific ie's; the caller is required to
834 ieee80211_ies_init(struct ieee80211_ies *ies, const uint8_t *data, int len)
836 /* NB: assumes data+len are the last fields */
837 memset(ies, 0, offsetof(struct ieee80211_ies, data));
838 if (ies->data != NULL && ies->len != len) {
839 /* data size changed */
840 free(ies->data, M_80211_NODE_IE);
843 if (ies->data == NULL) {
844 ies->data = (uint8_t *) malloc(len, M_80211_NODE_IE, M_NOWAIT);
845 if (ies->data == NULL) {
847 /* NB: pointers have already been zero'd above */
851 memcpy(ies->data, data, len);
857 * Reclaim storage for an ie blob.
860 ieee80211_ies_cleanup(struct ieee80211_ies *ies)
862 if (ies->data != NULL)
863 free(ies->data, M_80211_NODE_IE);
867 * Expand an ie blob data contents and to fillin individual
868 * ie pointers. The data blob is assumed to be well-formed;
869 * we don't do any validity checking of ie lengths.
872 ieee80211_ies_expand(struct ieee80211_ies *ies)
881 case IEEE80211_ELEMID_VENDOR:
884 else if (iswmeoui(ie))
886 #ifdef IEEE80211_SUPPORT_SUPERG
887 else if (isatherosoui(ie))
890 #ifdef IEEE80211_SUPPORT_TDMA
891 else if (istdmaoui(ie))
895 case IEEE80211_ELEMID_RSN:
898 case IEEE80211_ELEMID_HTCAP:
908 * Reclaim any resources in a node and reset any critical
909 * state. Typically nodes are free'd immediately after,
910 * but in some cases the storage may be reused so we need
911 * to insure consistent state (should probably fix that).
914 node_cleanup(struct ieee80211_node *ni)
916 #define N(a) (sizeof(a)/sizeof(a[0]))
917 struct ieee80211vap *vap = ni->ni_vap;
920 /* NB: preserve ni_table */
921 if (ni->ni_flags & IEEE80211_NODE_PWR_MGT) {
922 if (vap->iv_opmode != IEEE80211_M_STA)
924 ni->ni_flags &= ~IEEE80211_NODE_PWR_MGT;
925 IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni,
926 "power save mode off, %u sta's in ps mode", vap->iv_ps_sta);
929 * Cleanup any HT-related state.
931 if (ni->ni_flags & IEEE80211_NODE_HT)
932 ieee80211_ht_node_cleanup(ni);
933 #ifdef IEEE80211_SUPPORT_SUPERG
934 else if (ni->ni_ath_flags & IEEE80211_NODE_ATH)
935 ieee80211_ff_node_cleanup(ni);
938 * Clear AREF flag that marks the authorization refcnt bump
939 * has happened. This is probably not needed as the node
940 * should always be removed from the table so not found but
941 * do it just in case.
942 * Likewise clear the ASSOCID flag as these flags are intended
943 * to be managed in tandem.
945 ni->ni_flags &= ~(IEEE80211_NODE_AREF | IEEE80211_NODE_ASSOCID);
948 * Drain power save queue and, if needed, clear TIM.
950 if (ieee80211_node_psq_drain(ni) != 0 && vap->iv_set_tim != NULL)
951 vap->iv_set_tim(ni, 0);
954 if (ni->ni_challenge != NULL) {
955 free(ni->ni_challenge, M_80211_NODE);
956 ni->ni_challenge = NULL;
959 * Preserve SSID, WPA, and WME ie's so the bss node is
960 * reusable during a re-auth/re-assoc state transition.
961 * If we remove these data they will not be recreated
962 * because they come from a probe-response or beacon frame
963 * which cannot be expected prior to the association-response.
964 * This should not be an issue when operating in other modes
965 * as stations leaving always go through a full state transition
966 * which will rebuild this state.
968 * XXX does this leave us open to inheriting old state?
970 for (i = 0; i < N(ni->ni_rxfrag); i++)
971 if (ni->ni_rxfrag[i] != NULL) {
972 m_freem(ni->ni_rxfrag[i]);
973 ni->ni_rxfrag[i] = NULL;
976 * Must be careful here to remove any key map entry w/o a LOR.
978 ieee80211_node_delucastkey(ni);
983 node_free(struct ieee80211_node *ni)
985 struct ieee80211com *ic = ni->ni_ic;
987 ic->ic_node_cleanup(ni);
988 ieee80211_ies_cleanup(&ni->ni_ies);
989 ieee80211_psq_cleanup(&ni->ni_psq);
990 IEEE80211_NODE_WDSQ_DESTROY(ni);
991 free(ni, M_80211_NODE);
995 node_age(struct ieee80211_node *ni)
997 struct ieee80211vap *vap = ni->ni_vap;
999 IEEE80211_NODE_LOCK_ASSERT(&vap->iv_ic->ic_sta);
1002 * Age frames on the power save queue.
1004 if (ieee80211_node_psq_age(ni) != 0 &&
1005 ni->ni_psq.psq_len == 0 && vap->iv_set_tim != NULL)
1006 vap->iv_set_tim(ni, 0);
1008 * Age frames on the wds pending queue.
1010 if (IEEE80211_NODE_WDSQ_QLEN(ni) != 0)
1011 ieee80211_node_wdsq_age(ni);
1013 * Age out HT resources (e.g. frames on the
1014 * A-MPDU reorder queues).
1016 if (ni->ni_associd != 0 && (ni->ni_flags & IEEE80211_NODE_HT))
1017 ieee80211_ht_node_age(ni);
1021 node_getrssi(const struct ieee80211_node *ni)
1023 uint32_t avgrssi = ni->ni_avgrssi;
1026 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER)
1028 rssi = IEEE80211_RSSI_GET(avgrssi);
1029 return rssi < 0 ? 0 : rssi > 127 ? 127 : rssi;
1033 node_getsignal(const struct ieee80211_node *ni, int8_t *rssi, int8_t *noise)
1035 *rssi = node_getrssi(ni);
1036 *noise = ni->ni_noise;
1040 node_getmimoinfo(const struct ieee80211_node *ni,
1041 struct ieee80211_mimo_info *info)
1043 /* XXX zero data? */
1046 struct ieee80211_node *
1047 ieee80211_alloc_node(struct ieee80211_node_table *nt,
1048 struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN])
1050 struct ieee80211com *ic = nt->nt_ic;
1051 struct ieee80211_node *ni;
1054 ni = ic->ic_node_alloc(vap, macaddr);
1056 vap->iv_stats.is_rx_nodealloc++;
1060 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1061 "%s %p<%s> in %s table\n", __func__, ni,
1062 ether_sprintf(macaddr), nt->nt_name);
1064 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr);
1065 hash = IEEE80211_NODE_HASH(macaddr);
1066 ieee80211_node_initref(ni); /* mark referenced */
1067 ni->ni_chan = IEEE80211_CHAN_ANYC;
1068 ni->ni_authmode = IEEE80211_AUTH_OPEN;
1069 ni->ni_txpower = ic->ic_txpowlimit; /* max power */
1070 ni->ni_txparms = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)];
1071 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE);
1072 ni->ni_avgrssi = IEEE80211_RSSI_DUMMY_MARKER;
1073 ni->ni_inact_reload = nt->nt_inact_init;
1074 ni->ni_inact = ni->ni_inact_reload;
1075 ni->ni_ath_defkeyix = 0x7fff;
1076 ieee80211_psq_init(&ni->ni_psq, "unknown");
1077 IEEE80211_NODE_WDSQ_INIT(ni, "unknown");
1079 IEEE80211_NODE_LOCK(nt);
1080 TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list);
1081 LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash);
1085 IEEE80211_NODE_UNLOCK(nt);
1087 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni,
1088 "%s: inact_reload %u", __func__, ni->ni_inact_reload);
1094 * Craft a temporary node suitable for sending a management frame
1095 * to the specified station. We craft only as much state as we
1096 * need to do the work since the node will be immediately reclaimed
1097 * once the send completes.
1099 struct ieee80211_node *
1100 ieee80211_tmp_node(struct ieee80211vap *vap,
1101 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1103 struct ieee80211com *ic = vap->iv_ic;
1104 struct ieee80211_node *ni;
1106 ni = ic->ic_node_alloc(vap, macaddr);
1108 struct ieee80211_node *bss = vap->iv_bss;
1110 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1111 "%s %p<%s>\n", __func__, ni, ether_sprintf(macaddr));
1113 ni->ni_table = NULL; /* NB: pedantic */
1114 ni->ni_ic = ic; /* NB: needed to set channel */
1117 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr);
1118 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid);
1119 ieee80211_node_initref(ni); /* mark referenced */
1120 /* NB: required by ieee80211_fix_rate */
1121 ieee80211_node_set_chan(ni, bss->ni_chan);
1122 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey,
1123 IEEE80211_KEYIX_NONE);
1124 ni->ni_txpower = bss->ni_txpower;
1125 /* XXX optimize away */
1126 ieee80211_psq_init(&ni->ni_psq, "unknown");
1127 IEEE80211_NODE_WDSQ_INIT(ni, "unknown");
1130 vap->iv_stats.is_rx_nodealloc++;
1135 struct ieee80211_node *
1136 ieee80211_dup_bss(struct ieee80211vap *vap,
1137 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1139 struct ieee80211com *ic = vap->iv_ic;
1140 struct ieee80211_node *ni;
1142 ni = ieee80211_alloc_node(&ic->ic_sta, vap, macaddr);
1144 struct ieee80211_node *bss = vap->iv_bss;
1146 * Inherit from iv_bss.
1149 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid);
1150 ieee80211_node_set_chan(ni, bss->ni_chan);
1156 * Create a bss node for a legacy WDS vap. The far end does
1157 * not associate so we just create create a new node and
1158 * simulate an association. The caller is responsible for
1159 * installing the node as the bss node and handling any further
1160 * setup work like authorizing the port.
1162 struct ieee80211_node *
1163 ieee80211_node_create_wds(struct ieee80211vap *vap,
1164 const uint8_t bssid[IEEE80211_ADDR_LEN], struct ieee80211_channel *chan)
1166 struct ieee80211com *ic = vap->iv_ic;
1167 struct ieee80211_node *ni;
1169 /* XXX check if node already in sta table? */
1170 ni = ieee80211_alloc_node(&ic->ic_sta, vap, bssid);
1172 ni->ni_wdsvap = vap;
1173 IEEE80211_ADDR_COPY(ni->ni_bssid, bssid);
1175 * Inherit any manually configured settings.
1177 copy_bss(ni, vap->iv_bss);
1178 ieee80211_node_set_chan(ni, chan);
1179 /* NB: propagate ssid so available to WPA supplicant */
1180 ni->ni_esslen = vap->iv_des_ssid[0].len;
1181 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen);
1182 /* NB: no associd for peer */
1184 * There are no management frames to use to
1185 * discover neighbor capabilities, so blindly
1186 * propagate the local configuration.
1188 if (vap->iv_flags & IEEE80211_F_WME)
1189 ni->ni_flags |= IEEE80211_NODE_QOS;
1190 #ifdef IEEE80211_SUPPORT_SUPERG
1191 if (vap->iv_flags & IEEE80211_F_FF)
1192 ni->ni_flags |= IEEE80211_NODE_FF;
1194 if ((ic->ic_htcaps & IEEE80211_HTC_HT) &&
1195 (vap->iv_flags_ext & IEEE80211_FEXT_HT)) {
1197 * Device is HT-capable and HT is enabled for
1198 * the vap; setup HT operation. On return
1199 * ni_chan will be adjusted to an HT channel.
1201 ieee80211_ht_wds_init(ni);
1203 struct ieee80211_channel *c = ni->ni_chan;
1205 * Force a legacy channel to be used.
1207 c = ieee80211_find_channel(ic,
1208 c->ic_freq, c->ic_flags &~ IEEE80211_CHAN_HT);
1209 KASSERT(c != NULL, ("no legacy channel, %u/%x",
1210 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags));
1217 struct ieee80211_node *
1218 #ifdef IEEE80211_DEBUG_REFCNT
1219 ieee80211_find_node_locked_debug(struct ieee80211_node_table *nt,
1220 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line)
1222 ieee80211_find_node_locked(struct ieee80211_node_table *nt,
1223 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1226 struct ieee80211_node *ni;
1229 IEEE80211_NODE_LOCK_ASSERT(nt);
1231 hash = IEEE80211_NODE_HASH(macaddr);
1232 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) {
1233 if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) {
1234 ieee80211_ref_node(ni); /* mark referenced */
1235 #ifdef IEEE80211_DEBUG_REFCNT
1236 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1237 "%s (%s:%u) %p<%s> refcnt %d\n", __func__,
1239 ni, ether_sprintf(ni->ni_macaddr),
1240 ieee80211_node_refcnt(ni));
1248 struct ieee80211_node *
1249 #ifdef IEEE80211_DEBUG_REFCNT
1250 ieee80211_find_node_debug(struct ieee80211_node_table *nt,
1251 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line)
1253 ieee80211_find_node(struct ieee80211_node_table *nt,
1254 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1257 struct ieee80211_node *ni;
1259 IEEE80211_NODE_LOCK(nt);
1260 ni = ieee80211_find_node_locked(nt, macaddr);
1261 IEEE80211_NODE_UNLOCK(nt);
1265 struct ieee80211_node *
1266 #ifdef IEEE80211_DEBUG_REFCNT
1267 ieee80211_find_vap_node_locked_debug(struct ieee80211_node_table *nt,
1268 const struct ieee80211vap *vap,
1269 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line)
1271 ieee80211_find_vap_node_locked(struct ieee80211_node_table *nt,
1272 const struct ieee80211vap *vap,
1273 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1276 struct ieee80211_node *ni;
1279 IEEE80211_NODE_LOCK_ASSERT(nt);
1281 hash = IEEE80211_NODE_HASH(macaddr);
1282 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) {
1283 if (ni->ni_vap == vap &&
1284 IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) {
1285 ieee80211_ref_node(ni); /* mark referenced */
1286 #ifdef IEEE80211_DEBUG_REFCNT
1287 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1288 "%s (%s:%u) %p<%s> refcnt %d\n", __func__,
1290 ni, ether_sprintf(ni->ni_macaddr),
1291 ieee80211_node_refcnt(ni));
1299 struct ieee80211_node *
1300 #ifdef IEEE80211_DEBUG_REFCNT
1301 ieee80211_find_vap_node_debug(struct ieee80211_node_table *nt,
1302 const struct ieee80211vap *vap,
1303 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line)
1305 ieee80211_find_vap_node(struct ieee80211_node_table *nt,
1306 const struct ieee80211vap *vap,
1307 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1310 struct ieee80211_node *ni;
1312 IEEE80211_NODE_LOCK(nt);
1313 ni = ieee80211_find_vap_node_locked(nt, vap, macaddr);
1314 IEEE80211_NODE_UNLOCK(nt);
1319 * Fake up a node; this handles node discovery in adhoc mode.
1320 * Note that for the driver's benefit we we treat this like
1321 * an association so the driver has an opportunity to setup
1322 * it's private state.
1324 struct ieee80211_node *
1325 ieee80211_fakeup_adhoc_node(struct ieee80211vap *vap,
1326 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1328 struct ieee80211_node *ni;
1330 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1331 "%s: mac<%s>\n", __func__, ether_sprintf(macaddr));
1332 ni = ieee80211_dup_bss(vap, macaddr);
1334 struct ieee80211com *ic = vap->iv_ic;
1336 /* XXX no rate negotiation; just dup */
1337 ni->ni_rates = vap->iv_bss->ni_rates;
1338 if (ieee80211_iserp_rateset(&ni->ni_rates))
1339 ni->ni_flags |= IEEE80211_NODE_ERP;
1340 if (vap->iv_opmode == IEEE80211_M_AHDEMO) {
1342 * In adhoc demo mode there are no management
1343 * frames to use to discover neighbor capabilities,
1344 * so blindly propagate the local configuration
1345 * so we can do interesting things (e.g. use
1346 * WME to disable ACK's).
1348 if (vap->iv_flags & IEEE80211_F_WME)
1349 ni->ni_flags |= IEEE80211_NODE_QOS;
1350 #ifdef IEEE80211_SUPPORT_SUPERG
1351 if (vap->iv_flags & IEEE80211_F_FF)
1352 ni->ni_flags |= IEEE80211_NODE_FF;
1355 node_setuptxparms(ni);
1356 if (ic->ic_newassoc != NULL)
1357 ic->ic_newassoc(ni, 1);
1358 /* XXX not right for 802.1x/WPA */
1359 ieee80211_node_authorize(ni);
1365 ieee80211_init_neighbor(struct ieee80211_node *ni,
1366 const struct ieee80211_frame *wh,
1367 const struct ieee80211_scanparams *sp)
1369 ni->ni_esslen = sp->ssid[1];
1370 memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]);
1371 IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3);
1372 memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp));
1373 ni->ni_intval = sp->bintval;
1374 ni->ni_capinfo = sp->capinfo;
1375 ni->ni_chan = ni->ni_ic->ic_curchan;
1376 ni->ni_fhdwell = sp->fhdwell;
1377 ni->ni_fhindex = sp->fhindex;
1378 ni->ni_erp = sp->erp;
1379 ni->ni_timoff = sp->timoff;
1381 if (ieee80211_ies_init(&ni->ni_ies, sp->ies, sp->ies_len)) {
1382 ieee80211_ies_expand(&ni->ni_ies);
1383 if (ni->ni_ies.wme_ie != NULL)
1384 ni->ni_flags |= IEEE80211_NODE_QOS;
1386 ni->ni_flags &= ~IEEE80211_NODE_QOS;
1387 #ifdef IEEE80211_SUPPORT_SUPERG
1388 if (ni->ni_ies.ath_ie != NULL)
1389 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie);
1393 /* NB: must be after ni_chan is setup */
1394 ieee80211_setup_rates(ni, sp->rates, sp->xrates,
1395 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE |
1396 IEEE80211_F_DONEGO | IEEE80211_F_DODEL);
1400 * Do node discovery in adhoc mode on receipt of a beacon
1401 * or probe response frame. Note that for the driver's
1402 * benefit we we treat this like an association so the
1403 * driver has an opportunity to setup it's private state.
1405 struct ieee80211_node *
1406 ieee80211_add_neighbor(struct ieee80211vap *vap,
1407 const struct ieee80211_frame *wh,
1408 const struct ieee80211_scanparams *sp)
1410 struct ieee80211_node *ni;
1412 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1413 "%s: mac<%s>\n", __func__, ether_sprintf(wh->i_addr2));
1414 ni = ieee80211_dup_bss(vap, wh->i_addr2);/* XXX alloc_node? */
1416 struct ieee80211com *ic = vap->iv_ic;
1418 ieee80211_init_neighbor(ni, wh, sp);
1419 if (ieee80211_iserp_rateset(&ni->ni_rates))
1420 ni->ni_flags |= IEEE80211_NODE_ERP;
1421 node_setuptxparms(ni);
1422 if (ic->ic_newassoc != NULL)
1423 ic->ic_newassoc(ni, 1);
1424 /* XXX not right for 802.1x/WPA */
1425 ieee80211_node_authorize(ni);
1430 #define IS_CTL(wh) \
1431 ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) == IEEE80211_FC0_TYPE_CTL)
1432 #define IS_PSPOLL(wh) \
1433 ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == IEEE80211_FC0_SUBTYPE_PS_POLL)
1434 #define IS_BAR(wh) \
1435 ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == IEEE80211_FC0_SUBTYPE_BAR)
1436 #define IS_PROBEREQ(wh) \
1437 ((wh->i_fc[0] & (IEEE80211_FC0_TYPE_MASK|IEEE80211_FC0_SUBTYPE_MASK)) \
1438 == (IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ))
1439 #define IS_BCAST_PROBEREQ(wh) \
1440 (IS_PROBEREQ(wh) && IEEE80211_IS_MULTICAST( \
1441 ((const struct ieee80211_frame *)(wh))->i_addr3))
1443 static __inline struct ieee80211_node *
1444 _find_rxnode(struct ieee80211_node_table *nt,
1445 const struct ieee80211_frame_min *wh)
1447 /* XXX 4-address frames? */
1448 if (IS_CTL(wh) && !IS_PSPOLL(wh) && !IS_BAR(wh) /*&& !IS_RTS(ah)*/)
1449 return ieee80211_find_node_locked(nt, wh->i_addr1);
1450 if (IS_BCAST_PROBEREQ(wh))
1451 return NULL; /* spam bcast probe req to all vap's */
1452 return ieee80211_find_node_locked(nt, wh->i_addr2);
1456 * Locate the node for sender, track state, and then pass the
1457 * (referenced) node up to the 802.11 layer for its use. Note
1458 * we can return NULL if the sender is not in the table.
1460 struct ieee80211_node *
1461 #ifdef IEEE80211_DEBUG_REFCNT
1462 ieee80211_find_rxnode_debug(struct ieee80211com *ic,
1463 const struct ieee80211_frame_min *wh, const char *func, int line)
1465 ieee80211_find_rxnode(struct ieee80211com *ic,
1466 const struct ieee80211_frame_min *wh)
1469 struct ieee80211_node_table *nt;
1470 struct ieee80211_node *ni;
1473 IEEE80211_NODE_LOCK(nt);
1474 ni = _find_rxnode(nt, wh);
1475 IEEE80211_NODE_UNLOCK(nt);
1481 * Like ieee80211_find_rxnode but use the supplied h/w
1482 * key index as a hint to locate the node in the key
1483 * mapping table. If an entry is present at the key
1484 * index we return it; otherwise do a normal lookup and
1485 * update the mapping table if the station has a unicast
1486 * key assigned to it.
1488 struct ieee80211_node *
1489 #ifdef IEEE80211_DEBUG_REFCNT
1490 ieee80211_find_rxnode_withkey_debug(struct ieee80211com *ic,
1491 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix,
1492 const char *func, int line)
1494 ieee80211_find_rxnode_withkey(struct ieee80211com *ic,
1495 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix)
1498 struct ieee80211_node_table *nt;
1499 struct ieee80211_node *ni;
1502 IEEE80211_NODE_LOCK(nt);
1503 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax)
1504 ni = nt->nt_keyixmap[keyix];
1508 ni = _find_rxnode(nt, wh);
1509 if (ni != NULL && nt->nt_keyixmap != NULL) {
1511 * If the station has a unicast key cache slot
1512 * assigned update the key->node mapping table.
1514 keyix = ni->ni_ucastkey.wk_rxkeyix;
1515 /* XXX can keyixmap[keyix] != NULL? */
1516 if (keyix < nt->nt_keyixmax &&
1517 nt->nt_keyixmap[keyix] == NULL) {
1518 IEEE80211_DPRINTF(ni->ni_vap,
1520 "%s: add key map entry %p<%s> refcnt %d\n",
1521 __func__, ni, ether_sprintf(ni->ni_macaddr),
1522 ieee80211_node_refcnt(ni)+1);
1523 nt->nt_keyixmap[keyix] = ieee80211_ref_node(ni);
1527 if (IS_BCAST_PROBEREQ(wh))
1528 ni = NULL; /* spam bcast probe req to all vap's */
1530 ieee80211_ref_node(ni);
1532 IEEE80211_NODE_UNLOCK(nt);
1536 #undef IS_BCAST_PROBEREQ
1543 * Return a reference to the appropriate node for sending
1544 * a data frame. This handles node discovery in adhoc networks.
1546 struct ieee80211_node *
1547 #ifdef IEEE80211_DEBUG_REFCNT
1548 ieee80211_find_txnode_debug(struct ieee80211vap *vap,
1549 const uint8_t macaddr[IEEE80211_ADDR_LEN],
1550 const char *func, int line)
1552 ieee80211_find_txnode(struct ieee80211vap *vap,
1553 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1556 struct ieee80211_node_table *nt = &vap->iv_ic->ic_sta;
1557 struct ieee80211_node *ni;
1560 * The destination address should be in the node table
1561 * unless this is a multicast/broadcast frame. We can
1562 * also optimize station mode operation, all frames go
1565 /* XXX can't hold lock across dup_bss 'cuz of recursive locking */
1566 IEEE80211_NODE_LOCK(nt);
1567 if (vap->iv_opmode == IEEE80211_M_STA ||
1568 vap->iv_opmode == IEEE80211_M_WDS ||
1569 IEEE80211_IS_MULTICAST(macaddr))
1570 ni = ieee80211_ref_node(vap->iv_bss);
1572 ni = ieee80211_find_node_locked(nt, macaddr);
1573 IEEE80211_NODE_UNLOCK(nt);
1576 if (vap->iv_opmode == IEEE80211_M_IBSS ||
1577 vap->iv_opmode == IEEE80211_M_AHDEMO) {
1579 * In adhoc mode cons up a node for the destination.
1580 * Note that we need an additional reference for the
1581 * caller to be consistent with
1582 * ieee80211_find_node_locked.
1584 ni = ieee80211_fakeup_adhoc_node(vap, macaddr);
1586 (void) ieee80211_ref_node(ni);
1588 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, macaddr,
1589 "no node, discard frame (%s)", __func__);
1590 vap->iv_stats.is_tx_nonode++;
1597 _ieee80211_free_node(struct ieee80211_node *ni)
1599 struct ieee80211_node_table *nt = ni->ni_table;
1602 * NB: careful about referencing the vap as it may be
1603 * gone if the last reference was held by a driver.
1604 * We know the com will always be present so it's safe
1605 * to use ni_ic below to reclaim resources.
1608 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1609 "%s %p<%s> in %s table\n", __func__, ni,
1610 ether_sprintf(ni->ni_macaddr),
1611 nt != NULL ? nt->nt_name : "<gone>");
1613 if (ni->ni_associd != 0) {
1614 struct ieee80211vap *vap = ni->ni_vap;
1615 if (vap->iv_aid_bitmap != NULL)
1616 IEEE80211_AID_CLR(vap, ni->ni_associd);
1619 TAILQ_REMOVE(&nt->nt_node, ni, ni_list);
1620 LIST_REMOVE(ni, ni_hash);
1622 ni->ni_ic->ic_node_free(ni);
1626 #ifdef IEEE80211_DEBUG_REFCNT
1627 ieee80211_free_node_debug(struct ieee80211_node *ni, const char *func, int line)
1629 ieee80211_free_node(struct ieee80211_node *ni)
1632 struct ieee80211_node_table *nt = ni->ni_table;
1634 #ifdef IEEE80211_DEBUG_REFCNT
1635 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1636 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni,
1637 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1);
1640 IEEE80211_NODE_LOCK(nt);
1641 if (ieee80211_node_dectestref(ni)) {
1643 * Last reference, reclaim state.
1645 _ieee80211_free_node(ni);
1646 } else if (ieee80211_node_refcnt(ni) == 1 &&
1647 nt->nt_keyixmap != NULL) {
1648 ieee80211_keyix keyix;
1650 * Check for a last reference in the key mapping table.
1652 keyix = ni->ni_ucastkey.wk_rxkeyix;
1653 if (keyix < nt->nt_keyixmax &&
1654 nt->nt_keyixmap[keyix] == ni) {
1655 IEEE80211_DPRINTF(ni->ni_vap,
1657 "%s: %p<%s> clear key map entry", __func__,
1658 ni, ether_sprintf(ni->ni_macaddr));
1659 nt->nt_keyixmap[keyix] = NULL;
1660 ieee80211_node_decref(ni); /* XXX needed? */
1661 _ieee80211_free_node(ni);
1664 IEEE80211_NODE_UNLOCK(nt);
1666 if (ieee80211_node_dectestref(ni))
1667 _ieee80211_free_node(ni);
1672 * Reclaim a unicast key and clear any key cache state.
1675 ieee80211_node_delucastkey(struct ieee80211_node *ni)
1677 struct ieee80211com *ic = ni->ni_ic;
1678 struct ieee80211_node_table *nt = &ic->ic_sta;
1679 struct ieee80211_node *nikey;
1680 ieee80211_keyix keyix;
1681 int isowned, status;
1684 * NB: We must beware of LOR here; deleting the key
1685 * can cause the crypto layer to block traffic updates
1686 * which can generate a LOR against the node table lock;
1687 * grab it here and stash the key index for our use below.
1689 * Must also beware of recursion on the node table lock.
1690 * When called from node_cleanup we may already have
1691 * the node table lock held. Unfortunately there's no
1692 * way to separate out this path so we must do this
1695 isowned = IEEE80211_NODE_IS_LOCKED(nt);
1697 IEEE80211_NODE_LOCK(nt);
1699 status = 1; /* NB: success */
1700 if (ni->ni_ucastkey.wk_keyix != IEEE80211_KEYIX_NONE) {
1701 keyix = ni->ni_ucastkey.wk_rxkeyix;
1702 status = ieee80211_crypto_delkey(ni->ni_vap, &ni->ni_ucastkey);
1703 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) {
1704 nikey = nt->nt_keyixmap[keyix];
1705 nt->nt_keyixmap[keyix] = NULL;;
1709 IEEE80211_NODE_UNLOCK(nt);
1711 if (nikey != NULL) {
1712 KASSERT(nikey == ni,
1713 ("key map out of sync, ni %p nikey %p", ni, nikey));
1714 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1715 "%s: delete key map entry %p<%s> refcnt %d\n",
1716 __func__, ni, ether_sprintf(ni->ni_macaddr),
1717 ieee80211_node_refcnt(ni)-1);
1718 ieee80211_free_node(ni);
1724 * Reclaim a node. If this is the last reference count then
1725 * do the normal free work. Otherwise remove it from the node
1726 * table and mark it gone by clearing the back-reference.
1729 node_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni)
1731 ieee80211_keyix keyix;
1733 IEEE80211_NODE_LOCK_ASSERT(nt);
1735 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1736 "%s: remove %p<%s> from %s table, refcnt %d\n",
1737 __func__, ni, ether_sprintf(ni->ni_macaddr),
1738 nt->nt_name, ieee80211_node_refcnt(ni)-1);
1740 * Clear any entry in the unicast key mapping table.
1741 * We need to do it here so rx lookups don't find it
1742 * in the mapping table even if it's not in the hash
1743 * table. We cannot depend on the mapping table entry
1744 * being cleared because the node may not be free'd.
1746 keyix = ni->ni_ucastkey.wk_rxkeyix;
1747 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax &&
1748 nt->nt_keyixmap[keyix] == ni) {
1749 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1750 "%s: %p<%s> clear key map entry %u\n",
1751 __func__, ni, ether_sprintf(ni->ni_macaddr), keyix);
1752 nt->nt_keyixmap[keyix] = NULL;
1753 ieee80211_node_decref(ni); /* NB: don't need free */
1755 if (!ieee80211_node_dectestref(ni)) {
1757 * Other references are present, just remove the
1758 * node from the table so it cannot be found. When
1759 * the references are dropped storage will be
1762 TAILQ_REMOVE(&nt->nt_node, ni, ni_list);
1763 LIST_REMOVE(ni, ni_hash);
1764 ni->ni_table = NULL; /* clear reference */
1766 _ieee80211_free_node(ni);
1770 * Node table support.
1774 ieee80211_node_table_init(struct ieee80211com *ic,
1775 struct ieee80211_node_table *nt,
1776 const char *name, int inact, int keyixmax)
1778 struct ifnet *ifp = ic->ic_ifp;
1781 IEEE80211_NODE_LOCK_INIT(nt, ifp->if_xname);
1782 IEEE80211_NODE_ITERATE_LOCK_INIT(nt, ifp->if_xname);
1783 TAILQ_INIT(&nt->nt_node);
1786 nt->nt_inact_init = inact;
1787 nt->nt_keyixmax = keyixmax;
1788 if (nt->nt_keyixmax > 0) {
1789 nt->nt_keyixmap = (struct ieee80211_node **) malloc(
1790 keyixmax * sizeof(struct ieee80211_node *),
1791 M_80211_NODE, M_NOWAIT | M_ZERO);
1792 if (nt->nt_keyixmap == NULL)
1793 if_printf(ic->ic_ifp,
1794 "Cannot allocate key index map with %u entries\n",
1797 nt->nt_keyixmap = NULL;
1801 ieee80211_node_table_reset(struct ieee80211_node_table *nt,
1802 struct ieee80211vap *match)
1804 struct ieee80211_node *ni, *next;
1806 IEEE80211_NODE_LOCK(nt);
1807 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) {
1808 if (match != NULL && ni->ni_vap != match)
1810 /* XXX can this happen? if so need's work */
1811 if (ni->ni_associd != 0) {
1812 struct ieee80211vap *vap = ni->ni_vap;
1814 if (vap->iv_auth->ia_node_leave != NULL)
1815 vap->iv_auth->ia_node_leave(ni);
1816 if (vap->iv_aid_bitmap != NULL)
1817 IEEE80211_AID_CLR(vap, ni->ni_associd);
1819 ni->ni_wdsvap = NULL; /* clear reference */
1820 node_reclaim(nt, ni);
1822 if (match != NULL && match->iv_opmode == IEEE80211_M_WDS) {
1824 * Make a separate pass to clear references to this vap
1825 * held by DWDS entries. They will not be matched above
1826 * because ni_vap will point to the ap vap but we still
1827 * need to clear ni_wdsvap when the WDS vap is destroyed
1830 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next)
1831 if (ni->ni_wdsvap == match)
1832 ni->ni_wdsvap = NULL;
1834 IEEE80211_NODE_UNLOCK(nt);
1838 ieee80211_node_table_cleanup(struct ieee80211_node_table *nt)
1840 ieee80211_node_table_reset(nt, NULL);
1841 if (nt->nt_keyixmap != NULL) {
1843 /* XXX verify all entries are NULL */
1845 for (i = 0; i < nt->nt_keyixmax; i++)
1846 if (nt->nt_keyixmap[i] != NULL)
1847 printf("%s: %s[%u] still active\n", __func__,
1850 free(nt->nt_keyixmap, M_80211_NODE);
1851 nt->nt_keyixmap = NULL;
1853 IEEE80211_NODE_ITERATE_LOCK_DESTROY(nt);
1854 IEEE80211_NODE_LOCK_DESTROY(nt);
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 IEEE80211_NODE_ITERATE_LOCK(nt);
1876 gen = ++nt->nt_scangen;
1878 IEEE80211_NODE_LOCK(nt);
1879 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) {
1880 if (ni->ni_scangen == gen) /* previously handled */
1882 ni->ni_scangen = gen;
1884 * Ignore entries for which have yet to receive an
1885 * authentication frame. These are transient and
1886 * will be reclaimed when the last reference to them
1887 * goes away (when frame xmits complete).
1891 * Only process stations when in RUN state. This
1892 * insures, for example, that we don't timeout an
1893 * inactive station during CAC. Note that CSA state
1894 * is actually handled in ieee80211_node_timeout as
1895 * it applies to more than timeout processing.
1897 if (vap->iv_state != IEEE80211_S_RUN)
1899 /* XXX can vap be NULL? */
1900 if ((vap->iv_opmode == IEEE80211_M_HOSTAP ||
1901 vap->iv_opmode == IEEE80211_M_STA) &&
1902 (ni->ni_flags & IEEE80211_NODE_AREF) == 0)
1905 * Free fragment if not needed anymore
1906 * (last fragment older than 1s).
1907 * XXX doesn't belong here, move to node_age
1909 if (ni->ni_rxfrag[0] != NULL &&
1910 ticks > ni->ni_rxfragstamp + hz) {
1911 m_freem(ni->ni_rxfrag[0]);
1912 ni->ni_rxfrag[0] = NULL;
1914 if (ni->ni_inact > 0) {
1916 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni,
1917 "%s: inact %u inact_reload %u nrates %u",
1918 __func__, ni->ni_inact, ni->ni_inact_reload,
1919 ni->ni_rates.rs_nrates);
1922 * Special case ourself; we may be idle for extended periods
1923 * of time and regardless reclaiming our state is wrong.
1924 * XXX run ic_node_age
1926 if (ni == vap->iv_bss)
1928 if (ni->ni_associd != 0 ||
1929 (vap->iv_opmode == IEEE80211_M_IBSS ||
1930 vap->iv_opmode == IEEE80211_M_AHDEMO)) {
1932 * Age/drain resources held by the station.
1934 ic->ic_node_age(ni);
1936 * Probe the station before time it out. We
1937 * send a null data frame which may not be
1938 * universally supported by drivers (need it
1939 * for ps-poll support so it should be...).
1941 * XXX don't probe the station unless we've
1942 * received a frame from them (and have
1943 * some idea of the rates they are capable
1944 * of); this will get fixed more properly
1945 * soon with better handling of the rate set.
1947 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) &&
1948 (0 < ni->ni_inact &&
1949 ni->ni_inact <= vap->iv_inact_probe) &&
1950 ni->ni_rates.rs_nrates != 0) {
1952 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE,
1954 "probe station due to inactivity");
1956 * Grab a reference before unlocking the table
1957 * so the node cannot be reclaimed before we
1958 * send the frame. ieee80211_send_nulldata
1959 * understands we've done this and reclaims the
1960 * ref for us as needed.
1962 ieee80211_ref_node(ni);
1963 IEEE80211_NODE_UNLOCK(nt);
1964 ieee80211_send_nulldata(ni);
1969 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) &&
1970 ni->ni_inact <= 0) {
1972 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, ni,
1973 "station timed out due to inactivity "
1974 "(refcnt %u)", ieee80211_node_refcnt(ni));
1976 * Send a deauthenticate frame and drop the station.
1977 * This is somewhat complicated due to reference counts
1978 * and locking. At this point a station will typically
1979 * have a reference count of 1. ieee80211_node_leave
1980 * will do a "free" of the node which will drop the
1981 * reference count. But in the meantime a reference
1982 * wil be held by the deauth frame. The actual reclaim
1983 * of the node will happen either after the tx is
1984 * completed or by ieee80211_node_leave.
1986 * Separately we must drop the node lock before sending
1987 * in case the driver takes a lock, as this can result
1988 * in a LOR between the node lock and the driver lock.
1990 ieee80211_ref_node(ni);
1991 IEEE80211_NODE_UNLOCK(nt);
1992 if (ni->ni_associd != 0) {
1993 IEEE80211_SEND_MGMT(ni,
1994 IEEE80211_FC0_SUBTYPE_DEAUTH,
1995 IEEE80211_REASON_AUTH_EXPIRE);
1997 ieee80211_node_leave(ni);
1998 ieee80211_free_node(ni);
1999 vap->iv_stats.is_node_timeout++;
2003 IEEE80211_NODE_UNLOCK(nt);
2005 IEEE80211_NODE_ITERATE_UNLOCK(nt);
2009 * Aggressively reclaim resources. This should be used
2010 * only in a critical situation to reclaim mbuf resources.
2013 ieee80211_drain(struct ieee80211com *ic)
2015 struct ieee80211_node_table *nt = &ic->ic_sta;
2016 struct ieee80211vap *vap;
2017 struct ieee80211_node *ni;
2019 IEEE80211_NODE_LOCK(nt);
2020 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) {
2022 * Ignore entries for which have yet to receive an
2023 * authentication frame. These are transient and
2024 * will be reclaimed when the last reference to them
2025 * goes away (when frame xmits complete).
2029 * Only process stations when in RUN state. This
2030 * insures, for example, that we don't timeout an
2031 * inactive station during CAC. Note that CSA state
2032 * is actually handled in ieee80211_node_timeout as
2033 * it applies to more than timeout processing.
2035 if (vap->iv_state != IEEE80211_S_RUN)
2037 /* XXX can vap be NULL? */
2038 if ((vap->iv_opmode == IEEE80211_M_HOSTAP ||
2039 vap->iv_opmode == IEEE80211_M_STA) &&
2040 (ni->ni_flags & IEEE80211_NODE_AREF) == 0)
2044 * XXX doesn't belong here, move to node_drain
2046 if (ni->ni_rxfrag[0] != NULL) {
2047 m_freem(ni->ni_rxfrag[0]);
2048 ni->ni_rxfrag[0] = NULL;
2051 * Drain resources held by the station.
2053 ic->ic_node_drain(ni);
2055 IEEE80211_NODE_UNLOCK(nt);
2059 * Per-ieee80211com inactivity timer callback.
2062 ieee80211_node_timeout(void *arg)
2064 struct ieee80211com *ic = arg;
2067 * Defer timeout processing if a channel switch is pending.
2068 * We typically need to be mute so not doing things that
2069 * might generate frames is good to handle in one place.
2070 * Supressing the station timeout processing may extend the
2071 * lifetime of inactive stations (by not decrementing their
2072 * idle counters) but this should be ok unless the CSA is
2073 * active for an unusually long time.
2075 if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) {
2076 ieee80211_scan_timeout(ic);
2077 ieee80211_timeout_stations(ic);
2080 ieee80211_erp_timeout(ic);
2081 ieee80211_ht_timeout(ic);
2082 IEEE80211_UNLOCK(ic);
2084 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz,
2085 ieee80211_node_timeout, ic);
2089 ieee80211_iterate_nodes(struct ieee80211_node_table *nt,
2090 ieee80211_iter_func *f, void *arg)
2092 struct ieee80211_node *ni;
2095 IEEE80211_NODE_ITERATE_LOCK(nt);
2096 gen = ++nt->nt_scangen;
2098 IEEE80211_NODE_LOCK(nt);
2099 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) {
2100 if (ni->ni_scangen != gen) {
2101 ni->ni_scangen = gen;
2102 (void) ieee80211_ref_node(ni);
2103 IEEE80211_NODE_UNLOCK(nt);
2105 ieee80211_free_node(ni);
2109 IEEE80211_NODE_UNLOCK(nt);
2111 IEEE80211_NODE_ITERATE_UNLOCK(nt);
2115 ieee80211_dump_node(struct ieee80211_node_table *nt, struct ieee80211_node *ni)
2117 printf("0x%p: mac %s refcnt %d\n", ni,
2118 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni));
2119 printf("\tscangen %u authmode %u flags 0x%x\n",
2120 ni->ni_scangen, ni->ni_authmode, ni->ni_flags);
2121 printf("\tassocid 0x%x txpower %u vlan %u\n",
2122 ni->ni_associd, ni->ni_txpower, ni->ni_vlan);
2123 printf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n",
2124 ni->ni_txseqs[IEEE80211_NONQOS_TID],
2125 ni->ni_rxseqs[IEEE80211_NONQOS_TID] >> IEEE80211_SEQ_SEQ_SHIFT,
2126 ni->ni_rxseqs[IEEE80211_NONQOS_TID] & IEEE80211_SEQ_FRAG_MASK,
2127 ni->ni_rxfragstamp);
2128 printf("\trstamp %u rssi %d noise %d intval %u capinfo 0x%x\n",
2129 ni->ni_rstamp, node_getrssi(ni), ni->ni_noise,
2130 ni->ni_intval, ni->ni_capinfo);
2131 printf("\tbssid %s essid \"%.*s\" channel %u:0x%x\n",
2132 ether_sprintf(ni->ni_bssid),
2133 ni->ni_esslen, ni->ni_essid,
2134 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags);
2135 printf("\tinact %u inact_reload %u txrate %u\n",
2136 ni->ni_inact, ni->ni_inact_reload, ni->ni_txrate);
2137 printf("\thtcap %x htparam %x htctlchan %u ht2ndchan %u\n",
2138 ni->ni_htcap, ni->ni_htparam,
2139 ni->ni_htctlchan, ni->ni_ht2ndchan);
2140 printf("\thtopmode %x htstbc %x chw %u\n",
2141 ni->ni_htopmode, ni->ni_htstbc, ni->ni_chw);
2145 ieee80211_dump_nodes(struct ieee80211_node_table *nt)
2147 ieee80211_iterate_nodes(nt,
2148 (ieee80211_iter_func *) ieee80211_dump_node, nt);
2152 ieee80211_notify_erp_locked(struct ieee80211com *ic)
2154 struct ieee80211vap *vap;
2156 IEEE80211_LOCK_ASSERT(ic);
2158 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
2159 if (vap->iv_opmode == IEEE80211_M_HOSTAP)
2160 ieee80211_beacon_notify(vap, IEEE80211_BEACON_ERP);
2164 ieee80211_notify_erp(struct ieee80211com *ic)
2167 ieee80211_notify_erp_locked(ic);
2168 IEEE80211_UNLOCK(ic);
2172 * Handle a station joining an 11g network.
2175 ieee80211_node_join_11g(struct ieee80211_node *ni)
2177 struct ieee80211com *ic = ni->ni_ic;
2179 IEEE80211_LOCK_ASSERT(ic);
2182 * Station isn't capable of short slot time. Bump
2183 * the count of long slot time stations and disable
2184 * use of short slot time. Note that the actual switch
2185 * over to long slot time use may not occur until the
2186 * next beacon transmission (per sec. 7.3.1.4 of 11g).
2188 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) {
2189 ic->ic_longslotsta++;
2190 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2191 "station needs long slot time, count %d",
2192 ic->ic_longslotsta);
2193 /* XXX vap's w/ conflicting needs won't work */
2194 if (!IEEE80211_IS_CHAN_108G(ic->ic_bsschan)) {
2196 * Don't force slot time when switched to turbo
2197 * mode as non-ERP stations won't be present; this
2198 * need only be done when on the normal G channel.
2200 ieee80211_set_shortslottime(ic, 0);
2204 * If the new station is not an ERP station
2205 * then bump the counter and enable protection
2208 if (!ieee80211_iserp_rateset(&ni->ni_rates)) {
2210 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2211 "station is !ERP, %d non-ERP stations associated",
2214 * If station does not support short preamble
2215 * then we must enable use of Barker preamble.
2217 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) {
2218 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2219 "%s", "station needs long preamble");
2220 ic->ic_flags |= IEEE80211_F_USEBARKER;
2221 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE;
2224 * If protection is configured and this is the first
2225 * indication we should use protection, enable it.
2227 if (ic->ic_protmode != IEEE80211_PROT_NONE &&
2228 ic->ic_nonerpsta == 1 &&
2229 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) {
2230 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC,
2231 "%s: enable use of protection\n", __func__);
2232 ic->ic_flags |= IEEE80211_F_USEPROT;
2233 ieee80211_notify_erp_locked(ic);
2236 ni->ni_flags |= IEEE80211_NODE_ERP;
2240 ieee80211_node_join(struct ieee80211_node *ni, int resp)
2242 struct ieee80211com *ic = ni->ni_ic;
2243 struct ieee80211vap *vap = ni->ni_vap;
2246 if (ni->ni_associd == 0) {
2249 KASSERT(vap->iv_aid_bitmap != NULL, ("no aid bitmap"));
2251 * It would be good to search the bitmap
2252 * more efficiently, but this will do for now.
2254 for (aid = 1; aid < vap->iv_max_aid; aid++) {
2255 if (!IEEE80211_AID_ISSET(vap, aid))
2258 if (aid >= vap->iv_max_aid) {
2259 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_TOOMANY);
2260 ieee80211_node_leave(ni);
2263 ni->ni_associd = aid | 0xc000;
2264 ni->ni_jointime = time_uptime;
2266 IEEE80211_AID_SET(vap, ni->ni_associd);
2267 vap->iv_sta_assoc++;
2270 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan))
2271 ieee80211_ht_node_join(ni);
2272 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) &&
2273 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan))
2274 ieee80211_node_join_11g(ni);
2275 IEEE80211_UNLOCK(ic);
2281 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni,
2282 "station associated at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s",
2283 IEEE80211_NODE_AID(ni),
2284 ic->ic_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long",
2285 ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long",
2286 ic->ic_flags & IEEE80211_F_USEPROT ? ", protection" : "",
2287 ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "",
2288 ni->ni_flags & IEEE80211_NODE_HT ?
2289 (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "",
2290 ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "",
2291 ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" :
2292 ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "",
2293 ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "",
2294 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ?
2295 ", fast-frames" : "",
2296 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ?
2300 node_setuptxparms(ni);
2301 /* give driver a chance to setup state like ni_txrate */
2302 if (ic->ic_newassoc != NULL)
2303 ic->ic_newassoc(ni, newassoc);
2304 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_SUCCESS);
2305 /* tell the authenticator about new station */
2306 if (vap->iv_auth->ia_node_join != NULL)
2307 vap->iv_auth->ia_node_join(ni);
2308 ieee80211_notify_node_join(ni,
2309 resp == IEEE80211_FC0_SUBTYPE_ASSOC_RESP);
2313 disable_protection(struct ieee80211com *ic)
2315 KASSERT(ic->ic_nonerpsta == 0 &&
2316 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0,
2317 ("%d non ERP stations, flags 0x%x", ic->ic_nonerpsta,
2320 ic->ic_flags &= ~IEEE80211_F_USEPROT;
2321 /* XXX verify mode? */
2322 if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) {
2323 ic->ic_flags |= IEEE80211_F_SHPREAMBLE;
2324 ic->ic_flags &= ~IEEE80211_F_USEBARKER;
2326 ieee80211_notify_erp_locked(ic);
2330 * Handle a station leaving an 11g network.
2333 ieee80211_node_leave_11g(struct ieee80211_node *ni)
2335 struct ieee80211com *ic = ni->ni_ic;
2337 IEEE80211_LOCK_ASSERT(ic);
2339 KASSERT(IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan),
2340 ("not in 11g, bss %u:0x%x", ic->ic_bsschan->ic_freq,
2341 ic->ic_bsschan->ic_flags));
2344 * If a long slot station do the slot time bookkeeping.
2346 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) {
2347 KASSERT(ic->ic_longslotsta > 0,
2348 ("bogus long slot station count %d", ic->ic_longslotsta));
2349 ic->ic_longslotsta--;
2350 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2351 "long slot time station leaves, count now %d",
2352 ic->ic_longslotsta);
2353 if (ic->ic_longslotsta == 0) {
2355 * Re-enable use of short slot time if supported
2356 * and not operating in IBSS mode (per spec).
2358 if ((ic->ic_caps & IEEE80211_C_SHSLOT) &&
2359 ic->ic_opmode != IEEE80211_M_IBSS) {
2360 IEEE80211_DPRINTF(ni->ni_vap,
2361 IEEE80211_MSG_ASSOC,
2362 "%s: re-enable use of short slot time\n",
2364 ieee80211_set_shortslottime(ic, 1);
2369 * If a non-ERP station do the protection-related bookkeeping.
2371 if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) {
2372 KASSERT(ic->ic_nonerpsta > 0,
2373 ("bogus non-ERP station count %d", ic->ic_nonerpsta));
2375 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2376 "non-ERP station leaves, count now %d%s", ic->ic_nonerpsta,
2377 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) ?
2378 " (non-ERP sta present)" : "");
2379 if (ic->ic_nonerpsta == 0 &&
2380 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) {
2381 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC,
2382 "%s: disable use of protection\n", __func__);
2383 disable_protection(ic);
2389 * Time out presence of an overlapping bss with non-ERP
2390 * stations. When operating in hostap mode we listen for
2391 * beacons from other stations and if we identify a non-ERP
2392 * station is present we enable protection. To identify
2393 * when all non-ERP stations are gone we time out this
2397 ieee80211_erp_timeout(struct ieee80211com *ic)
2400 IEEE80211_LOCK_ASSERT(ic);
2402 if ((ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) &&
2403 time_after(ticks, ic->ic_lastnonerp + IEEE80211_NONERP_PRESENT_AGE)) {
2405 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni,
2406 "%s", "age out non-ERP sta present on channel");
2408 ic->ic_flags_ext &= ~IEEE80211_FEXT_NONERP_PR;
2409 if (ic->ic_nonerpsta == 0)
2410 disable_protection(ic);
2415 * Handle bookkeeping for station deauthentication/disassociation
2416 * when operating as an ap.
2419 ieee80211_node_leave(struct ieee80211_node *ni)
2421 struct ieee80211com *ic = ni->ni_ic;
2422 struct ieee80211vap *vap = ni->ni_vap;
2423 struct ieee80211_node_table *nt = ni->ni_table;
2425 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni,
2426 "station with aid %d leaves", IEEE80211_NODE_AID(ni));
2428 KASSERT(vap->iv_opmode != IEEE80211_M_STA,
2429 ("unexpected operating mode %u", vap->iv_opmode));
2431 * If node wasn't previously associated all
2432 * we need to do is reclaim the reference.
2434 /* XXX ibss mode bypasses 11g and notification */
2435 if (ni->ni_associd == 0)
2438 * Tell the authenticator the station is leaving.
2439 * Note that we must do this before yanking the
2440 * association id as the authenticator uses the
2441 * associd to locate it's state block.
2443 if (vap->iv_auth->ia_node_leave != NULL)
2444 vap->iv_auth->ia_node_leave(ni);
2447 IEEE80211_AID_CLR(vap, ni->ni_associd);
2449 vap->iv_sta_assoc--;
2452 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan))
2453 ieee80211_ht_node_leave(ni);
2454 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) &&
2455 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan))
2456 ieee80211_node_leave_11g(ni);
2457 IEEE80211_UNLOCK(ic);
2459 * Cleanup station state. In particular clear various
2460 * state that might otherwise be reused if the node
2461 * is reused before the reference count goes to zero
2462 * (and memory is reclaimed).
2464 ieee80211_sta_leave(ni);
2467 * Remove the node from any table it's recorded in and
2468 * drop the caller's reference. Removal from the table
2469 * is important to insure the node is not reprocessed
2473 IEEE80211_NODE_LOCK(nt);
2474 node_reclaim(nt, ni);
2475 IEEE80211_NODE_UNLOCK(nt);
2477 ieee80211_free_node(ni);
2481 struct ieee80211vap *vap;
2483 uint32_t rssi_total;
2487 get_hostap_rssi(void *arg, struct ieee80211_node *ni)
2489 struct rssiinfo *info = arg;
2490 struct ieee80211vap *vap = ni->ni_vap;
2493 if (info->vap != vap)
2495 /* only associated stations */
2496 if (ni->ni_associd == 0)
2498 rssi = vap->iv_ic->ic_node_getrssi(ni);
2500 info->rssi_samples++;
2501 info->rssi_total += rssi;
2506 get_adhoc_rssi(void *arg, struct ieee80211_node *ni)
2508 struct rssiinfo *info = arg;
2509 struct ieee80211vap *vap = ni->ni_vap;
2512 if (info->vap != vap)
2514 /* only neighbors */
2515 /* XXX check bssid */
2516 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0)
2518 rssi = vap->iv_ic->ic_node_getrssi(ni);
2520 info->rssi_samples++;
2521 info->rssi_total += rssi;
2526 ieee80211_getrssi(struct ieee80211vap *vap)
2528 #define NZ(x) ((x) == 0 ? 1 : (x))
2529 struct ieee80211com *ic = vap->iv_ic;
2530 struct rssiinfo info;
2532 info.rssi_total = 0;
2533 info.rssi_samples = 0;
2535 switch (vap->iv_opmode) {
2536 case IEEE80211_M_IBSS: /* average of all ibss neighbors */
2537 case IEEE80211_M_AHDEMO: /* average of all neighbors */
2538 ieee80211_iterate_nodes(&ic->ic_sta, get_adhoc_rssi, &info);
2540 case IEEE80211_M_HOSTAP: /* average of all associated stations */
2541 ieee80211_iterate_nodes(&ic->ic_sta, get_hostap_rssi, &info);
2543 case IEEE80211_M_MONITOR: /* XXX */
2544 case IEEE80211_M_STA: /* use stats from associated ap */
2546 if (vap->iv_bss != NULL)
2547 info.rssi_total = ic->ic_node_getrssi(vap->iv_bss);
2548 info.rssi_samples = 1;
2551 return info.rssi_total / NZ(info.rssi_samples);
2556 ieee80211_getsignal(struct ieee80211vap *vap, int8_t *rssi, int8_t *noise)
2559 if (vap->iv_bss == NULL) /* NB: shouldn't happen */
2561 vap->iv_ic->ic_node_getsignal(vap->iv_bss, rssi, noise);
2562 /* for non-station mode return avg'd rssi accounting */
2563 if (vap->iv_opmode != IEEE80211_M_STA)
2564 *rssi = ieee80211_getrssi(vap);