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;
510 char ethstr[ETHER_ADDRSTRLEN + 1];
513 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan)))
515 if (vap->iv_opmode == IEEE80211_M_IBSS) {
516 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0)
519 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0)
522 if (vap->iv_flags & IEEE80211_F_PRIVACY) {
523 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0)
526 /* XXX does this mean privacy is supported or required? */
527 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY)
530 rate = ieee80211_fix_rate(ni, &ni->ni_rates,
531 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE);
532 if (rate & IEEE80211_RATE_BASIC)
534 if (vap->iv_des_nssid != 0 &&
535 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid))
537 if ((vap->iv_flags & IEEE80211_F_DESBSSID) &&
538 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid))
541 kprintf(" %c %s", fail ? '-' : '+', kether_ntoa(ni->ni_macaddr, ethstr));
542 kprintf(" %s%c", kether_ntoa(ni->ni_bssid, ethstr), fail & 0x20 ? '!' : ' ');
544 ieee80211_chan2ieee(ic, ni->ni_chan), fail & 0x01 ? '!' : ' ');
545 kprintf(" %2dM%c", (rate & IEEE80211_RATE_VAL) / 2,
546 fail & 0x08 ? '!' : ' ');
548 (ni->ni_capinfo & IEEE80211_CAPINFO_ESS) ? "ess" :
549 (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) ? "ibss" :
551 fail & 0x02 ? '!' : ' ');
553 (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) ? "wep" : "no",
554 fail & 0x04 ? '!' : ' ');
555 ieee80211_print_essid(ni->ni_essid, ni->ni_esslen);
556 kprintf("%s\n", fail & 0x10 ? "!" : "");
558 #endif /* IEEE80211_DEBUG */
561 * Handle 802.11 ad hoc network merge. The
562 * convention, set by the Wireless Ethernet Compatibility Alliance
563 * (WECA), is that an 802.11 station will change its BSSID to match
564 * the "oldest" 802.11 ad hoc network, on the same channel, that
565 * has the station's desired SSID. The "oldest" 802.11 network
566 * sends beacons with the greatest TSF timestamp.
568 * The caller is assumed to validate TSF's before attempting a merge.
570 * Return !0 if the BSSID changed, 0 otherwise.
573 ieee80211_ibss_merge(struct ieee80211_node *ni)
575 struct ieee80211vap *vap = ni->ni_vap;
576 #ifdef IEEE80211_DEBUG
577 struct ieee80211com *ic = ni->ni_ic;
578 char ethstr[ETHER_ADDRSTRLEN + 1];
581 if (ni == vap->iv_bss ||
582 IEEE80211_ADDR_EQ(ni->ni_bssid, vap->iv_bss->ni_bssid)) {
583 /* unchanged, nothing to do */
586 if (!check_bss(vap, ni)) {
587 /* capabilities mismatch */
588 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC,
589 "%s: merge failed, capabilities mismatch\n", __func__);
590 #ifdef IEEE80211_DEBUG
591 if (ieee80211_msg_assoc(vap))
592 check_bss_debug(vap, ni);
594 vap->iv_stats.is_ibss_capmismatch++;
597 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC,
598 "%s: new bssid %s: %s preamble, %s slot time%s\n", __func__,
599 kether_ntoa(ni->ni_bssid, ethstr),
600 ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long",
601 ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long",
602 ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : ""
604 return ieee80211_sta_join1(ieee80211_ref_node(ni));
608 * Calculate HT channel promotion flags for all vaps.
609 * This assumes ni_chan have been setup for each vap.
612 gethtadjustflags(struct ieee80211com *ic)
614 struct ieee80211vap *vap;
619 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
620 if (vap->iv_state < IEEE80211_S_RUN)
622 switch (vap->iv_opmode) {
623 case IEEE80211_M_WDS:
624 case IEEE80211_M_STA:
625 case IEEE80211_M_AHDEMO:
626 case IEEE80211_M_HOSTAP:
627 case IEEE80211_M_IBSS:
628 case IEEE80211_M_MBSS:
629 flags |= ieee80211_htchanflags(vap->iv_bss->ni_chan);
639 * Check if the current channel needs to change based on whether
640 * any vap's are using HT20/HT40. This is used to sync the state
641 * of ic_curchan after a channel width change on a running vap.
644 ieee80211_sync_curchan(struct ieee80211com *ic)
646 struct ieee80211_channel *c;
648 c = ieee80211_ht_adjust_channel(ic, ic->ic_curchan, gethtadjustflags(ic));
649 if (c != ic->ic_curchan) {
651 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan);
652 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan);
653 ic->ic_set_channel(ic);
654 ieee80211_radiotap_chan_change(ic);
659 * Setup the current channel. The request channel may be
660 * promoted if other vap's are operating with HT20/HT40.
663 ieee80211_setupcurchan(struct ieee80211com *ic, struct ieee80211_channel *c)
665 if (ic->ic_htcaps & IEEE80211_HTC_HT) {
666 int flags = gethtadjustflags(ic);
668 * Check for channel promotion required to support the
669 * set of running vap's. This assumes we are called
670 * after ni_chan is setup for each vap.
672 /* NB: this assumes IEEE80211_FHT_USEHT40 > IEEE80211_FHT_HT */
673 if (flags > ieee80211_htchanflags(c))
674 c = ieee80211_ht_adjust_channel(ic, c, flags);
676 ic->ic_bsschan = ic->ic_curchan = c;
677 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan);
678 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan);
682 * Change the current channel. The channel change is guaranteed to have
683 * happened before the next state change.
686 ieee80211_setcurchan(struct ieee80211com *ic, struct ieee80211_channel *c)
688 ieee80211_setupcurchan(ic, c);
689 ieee80211_runtask(ic, &ic->ic_chan_task);
693 * Join the specified IBSS/BSS network. The node is assumed to
694 * be passed in with a held reference.
697 ieee80211_sta_join1(struct ieee80211_node *selbs)
699 struct ieee80211vap *vap = selbs->ni_vap;
700 struct ieee80211com *ic = selbs->ni_ic;
701 struct ieee80211_node *obss;
705 * Committed to selbs, setup state.
709 * Check if old+new node have the same address in which
710 * case we can reassociate when operating in sta mode.
712 canreassoc = (obss != NULL &&
713 vap->iv_state == IEEE80211_S_RUN &&
714 IEEE80211_ADDR_EQ(obss->ni_macaddr, selbs->ni_macaddr));
715 vap->iv_bss = selbs; /* NB: caller assumed to bump refcnt */
717 copy_bss(selbs, obss);
718 ieee80211_node_decref(obss); /* iv_bss reference */
719 ieee80211_free_node(obss); /* station table reference */
720 obss = NULL; /* NB: guard against later use */
724 * Delete unusable rates; we've already checked
725 * that the negotiated rate set is acceptable.
727 ieee80211_fix_rate(vap->iv_bss, &vap->iv_bss->ni_rates,
728 IEEE80211_F_DODEL | IEEE80211_F_JOIN);
730 ieee80211_setcurchan(ic, selbs->ni_chan);
732 * Set the erp state (mostly the slot time) to deal with
733 * the auto-select case; this should be redundant if the
736 ieee80211_reset_erp(ic);
737 ieee80211_wme_initparams(vap);
739 if (vap->iv_opmode == IEEE80211_M_STA) {
742 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 1);
745 * Act as if we received a DEAUTH frame in case we
746 * are invoked from the RUN state. This will cause
747 * us to try to re-authenticate if we are operating
750 ieee80211_new_state(vap, IEEE80211_S_AUTH,
751 IEEE80211_FC0_SUBTYPE_DEAUTH);
754 ieee80211_new_state(vap, IEEE80211_S_RUN, -1);
759 ieee80211_sta_join(struct ieee80211vap *vap, struct ieee80211_channel *chan,
760 const struct ieee80211_scan_entry *se)
762 struct ieee80211com *ic = vap->iv_ic;
763 struct ieee80211_node *ni;
765 ni = ieee80211_alloc_node(&ic->ic_sta, vap, se->se_macaddr);
771 * Expand scan state into node's format.
772 * XXX may not need all this stuff
774 IEEE80211_ADDR_COPY(ni->ni_bssid, se->se_bssid);
775 ni->ni_esslen = se->se_ssid[1];
776 memcpy(ni->ni_essid, se->se_ssid+2, ni->ni_esslen);
777 ni->ni_tstamp.tsf = se->se_tstamp.tsf;
778 ni->ni_intval = se->se_intval;
779 ni->ni_capinfo = se->se_capinfo;
781 ni->ni_timoff = se->se_timoff;
782 ni->ni_fhdwell = se->se_fhdwell;
783 ni->ni_fhindex = se->se_fhindex;
784 ni->ni_erp = se->se_erp;
785 IEEE80211_RSSI_LPF(ni->ni_avgrssi, se->se_rssi);
786 ni->ni_noise = se->se_noise;
787 if (vap->iv_opmode == IEEE80211_M_STA) {
788 /* NB: only infrastructure mode requires an associd */
789 ni->ni_flags |= IEEE80211_NODE_ASSOCID;
792 if (ieee80211_ies_init(&ni->ni_ies, se->se_ies.data, se->se_ies.len)) {
793 ieee80211_ies_expand(&ni->ni_ies);
794 #ifdef IEEE80211_SUPPORT_SUPERG
795 if (ni->ni_ies.ath_ie != NULL)
796 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie);
798 if (ni->ni_ies.htcap_ie != NULL)
799 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie);
800 if (ni->ni_ies.htinfo_ie != NULL)
801 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie);
802 #ifdef IEEE80211_SUPPORT_MESH
803 if (ni->ni_ies.meshid_ie != NULL)
804 ieee80211_parse_meshid(ni, ni->ni_ies.meshid_ie);
806 #ifdef IEEE80211_SUPPORT_TDMA
807 if (ni->ni_ies.tdma_ie != NULL)
808 ieee80211_parse_tdma(ni, ni->ni_ies.tdma_ie);
812 vap->iv_dtim_period = se->se_dtimperiod;
813 vap->iv_dtim_count = 0;
815 /* NB: must be after ni_chan is setup */
816 ieee80211_setup_rates(ni, se->se_rates, se->se_xrates,
818 if (ieee80211_iserp_rateset(&ni->ni_rates))
819 ni->ni_flags |= IEEE80211_NODE_ERP;
820 ieee80211_node_setuptxparms(ni);
822 return ieee80211_sta_join1(ieee80211_ref_node(ni));
826 * Leave the specified IBSS/BSS network. The node is assumed to
827 * be passed in with a held reference.
830 ieee80211_sta_leave(struct ieee80211_node *ni)
832 struct ieee80211com *ic = ni->ni_ic;
834 ic->ic_node_cleanup(ni);
835 ieee80211_notify_node_leave(ni);
839 * Send a deauthenticate frame and drop the station.
842 ieee80211_node_deauth(struct ieee80211_node *ni, int reason)
844 /* NB: bump the refcnt to be sure temporay nodes are not reclaimed */
845 ieee80211_ref_node(ni);
846 if (ni->ni_associd != 0)
847 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH, reason);
848 ieee80211_node_leave(ni);
849 ieee80211_free_node(ni);
852 static struct ieee80211_node *
853 node_alloc(struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN])
855 struct ieee80211_node *ni;
857 ni = (struct ieee80211_node *) kmalloc(sizeof(struct ieee80211_node),
858 M_80211_NODE, M_INTWAIT | M_ZERO);
863 * Initialize an ie blob with the specified data. If previous
864 * data exists re-use the data block. As a side effect we clear
865 * all references to specific ie's; the caller is required to
869 ieee80211_ies_init(struct ieee80211_ies *ies, const uint8_t *data, int len)
871 /* NB: assumes data+len are the last fields */
872 memset(ies, 0, offsetof(struct ieee80211_ies, data));
873 if (ies->data != NULL && ies->len != len) {
874 /* data size changed */
875 kfree(ies->data, M_80211_NODE_IE);
878 if (ies->data == NULL) {
879 ies->data = (uint8_t *) kmalloc(len, M_80211_NODE_IE, M_INTWAIT);
880 if (ies->data == NULL) {
882 /* NB: pointers have already been zero'd above */
886 memcpy(ies->data, data, len);
892 * Reclaim storage for an ie blob.
895 ieee80211_ies_cleanup(struct ieee80211_ies *ies)
897 if (ies->data != NULL)
898 kfree(ies->data, M_80211_NODE_IE);
902 * Expand an ie blob data contents and to fillin individual
903 * ie pointers. The data blob is assumed to be well-formed;
904 * we don't do any validity checking of ie lengths.
907 ieee80211_ies_expand(struct ieee80211_ies *ies)
916 case IEEE80211_ELEMID_VENDOR:
919 else if (iswmeoui(ie))
921 #ifdef IEEE80211_SUPPORT_SUPERG
922 else if (isatherosoui(ie))
925 #ifdef IEEE80211_SUPPORT_TDMA
926 else if (istdmaoui(ie))
930 case IEEE80211_ELEMID_RSN:
933 case IEEE80211_ELEMID_HTCAP:
936 #ifdef IEEE80211_SUPPORT_MESH
937 case IEEE80211_ELEMID_MESHID:
948 * Reclaim any resources in a node and reset any critical
949 * state. Typically nodes are free'd immediately after,
950 * but in some cases the storage may be reused so we need
951 * to insure consistent state (should probably fix that).
954 node_cleanup(struct ieee80211_node *ni)
956 struct ieee80211vap *vap = ni->ni_vap;
957 struct ieee80211com *ic = ni->ni_ic;
960 /* NB: preserve ni_table */
961 if (ni->ni_flags & IEEE80211_NODE_PWR_MGT) {
962 if (vap->iv_opmode != IEEE80211_M_STA)
964 ni->ni_flags &= ~IEEE80211_NODE_PWR_MGT;
965 IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni,
966 "power save mode off, %u sta's in ps mode", vap->iv_ps_sta);
969 * Cleanup any HT-related state.
971 if (ni->ni_flags & IEEE80211_NODE_HT)
972 ieee80211_ht_node_cleanup(ni);
973 #ifdef IEEE80211_SUPPORT_SUPERG
974 else if (ni->ni_ath_flags & IEEE80211_NODE_ATH)
975 ieee80211_ff_node_cleanup(ni);
977 #ifdef IEEE80211_SUPPORT_MESH
979 * Cleanup any mesh-related state.
981 if (vap->iv_opmode == IEEE80211_M_MBSS)
982 ieee80211_mesh_node_cleanup(ni);
985 * Clear any staging queue entries.
987 ieee80211_ageq_drain_node(&ic->ic_stageq, ni);
990 * Clear AREF flag that marks the authorization refcnt bump
991 * has happened. This is probably not needed as the node
992 * should always be removed from the table so not found but
993 * do it just in case.
994 * Likewise clear the ASSOCID flag as these flags are intended
995 * to be managed in tandem.
997 ni->ni_flags &= ~(IEEE80211_NODE_AREF | IEEE80211_NODE_ASSOCID);
1000 * Drain power save queue and, if needed, clear TIM.
1002 if (ieee80211_node_psq_drain(ni) != 0 && vap->iv_set_tim != NULL)
1003 vap->iv_set_tim(ni, 0);
1006 if (ni->ni_challenge != NULL) {
1007 kfree(ni->ni_challenge, M_80211_NODE);
1008 ni->ni_challenge = NULL;
1011 * Preserve SSID, WPA, and WME ie's so the bss node is
1012 * reusable during a re-auth/re-assoc state transition.
1013 * If we remove these data they will not be recreated
1014 * because they come from a probe-response or beacon frame
1015 * which cannot be expected prior to the association-response.
1016 * This should not be an issue when operating in other modes
1017 * as stations leaving always go through a full state transition
1018 * which will rebuild this state.
1020 * XXX does this leave us open to inheriting old state?
1022 for (i = 0; i < NELEM(ni->ni_rxfrag); i++)
1023 if (ni->ni_rxfrag[i] != NULL) {
1024 m_freem(ni->ni_rxfrag[i]);
1025 ni->ni_rxfrag[i] = NULL;
1028 * Must be careful here to remove any key map entry w/o a LOR.
1030 ieee80211_node_delucastkey(ni);
1034 node_free(struct ieee80211_node *ni)
1036 struct ieee80211com *ic = ni->ni_ic;
1038 ieee80211_ratectl_node_deinit(ni);
1039 ic->ic_node_cleanup(ni);
1040 ieee80211_ies_cleanup(&ni->ni_ies);
1041 ieee80211_psq_cleanup(&ni->ni_psq);
1042 kfree(ni, M_80211_NODE);
1046 node_age(struct ieee80211_node *ni)
1048 struct ieee80211vap *vap = ni->ni_vap;
1051 * Age frames on the power save queue.
1053 if (ieee80211_node_psq_age(ni) != 0 &&
1054 ni->ni_psq.psq_len == 0 && vap->iv_set_tim != NULL)
1055 vap->iv_set_tim(ni, 0);
1057 * Age out HT resources (e.g. frames on the
1058 * A-MPDU reorder queues).
1060 if (ni->ni_associd != 0 && (ni->ni_flags & IEEE80211_NODE_HT))
1061 ieee80211_ht_node_age(ni);
1065 node_getrssi(const struct ieee80211_node *ni)
1067 uint32_t avgrssi = ni->ni_avgrssi;
1070 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER)
1072 rssi = IEEE80211_RSSI_GET(avgrssi);
1073 return rssi < 0 ? 0 : rssi > 127 ? 127 : rssi;
1077 node_getsignal(const struct ieee80211_node *ni, int8_t *rssi, int8_t *noise)
1079 *rssi = node_getrssi(ni);
1080 *noise = ni->ni_noise;
1084 node_getmimoinfo(const struct ieee80211_node *ni,
1085 struct ieee80211_mimo_info *info)
1087 /* XXX zero data? */
1090 struct ieee80211_node *
1091 ieee80211_alloc_node(struct ieee80211_node_table *nt,
1092 struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN])
1094 struct ieee80211com *ic = nt->nt_ic;
1095 struct ieee80211_node *ni;
1097 #ifdef IEEE80211_DEBUG
1098 char ethstr[ETHER_ADDRSTRLEN + 1];
1101 ni = ic->ic_node_alloc(vap, macaddr);
1103 vap->iv_stats.is_rx_nodealloc++;
1107 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1108 "%s %p<%s> in %s table\n", __func__, ni,
1109 kether_ntoa(macaddr, ethstr), nt->nt_name);
1111 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr);
1112 hash = IEEE80211_NODE_HASH(ic, macaddr);
1113 ieee80211_node_initref(ni); /* mark referenced */
1114 ni->ni_chan = IEEE80211_CHAN_ANYC;
1115 ni->ni_authmode = IEEE80211_AUTH_OPEN;
1116 ni->ni_txpower = ic->ic_txpowlimit; /* max power */
1117 ni->ni_txparms = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)];
1118 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE);
1119 ni->ni_avgrssi = IEEE80211_RSSI_DUMMY_MARKER;
1120 ni->ni_inact_reload = nt->nt_inact_init;
1121 ni->ni_inact = ni->ni_inact_reload;
1122 ni->ni_ath_defkeyix = 0x7fff;
1123 ieee80211_psq_init(&ni->ni_psq, "unknown");
1124 #ifdef IEEE80211_SUPPORT_MESH
1125 if (vap->iv_opmode == IEEE80211_M_MBSS)
1126 ieee80211_mesh_node_init(vap, ni);
1128 TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list);
1129 LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash);
1134 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni,
1135 "%s: inact_reload %u", __func__, ni->ni_inact_reload);
1141 * Craft a temporary node suitable for sending a management frame
1142 * to the specified station. We craft only as much state as we
1143 * need to do the work since the node will be immediately reclaimed
1144 * once the send completes.
1146 struct ieee80211_node *
1147 ieee80211_tmp_node(struct ieee80211vap *vap,
1148 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1150 struct ieee80211com *ic = vap->iv_ic;
1151 struct ieee80211_node *ni;
1152 #ifdef IEEE80211_DEBUG
1153 char ethstr[ETHER_ADDRSTRLEN + 1];
1156 ni = ic->ic_node_alloc(vap, macaddr);
1158 struct ieee80211_node *bss = vap->iv_bss;
1160 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1161 "%s %p<%s>\n", __func__, ni, kether_ntoa(macaddr, ethstr));
1163 ni->ni_table = NULL; /* NB: pedantic */
1164 ni->ni_ic = ic; /* NB: needed to set channel */
1167 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr);
1168 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid);
1169 ieee80211_node_initref(ni); /* mark referenced */
1170 /* NB: required by ieee80211_fix_rate */
1171 ieee80211_node_set_chan(ni, bss->ni_chan);
1172 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey,
1173 IEEE80211_KEYIX_NONE);
1174 ni->ni_txpower = bss->ni_txpower;
1175 /* XXX optimize away */
1176 ieee80211_psq_init(&ni->ni_psq, "unknown");
1179 vap->iv_stats.is_rx_nodealloc++;
1184 struct ieee80211_node *
1185 ieee80211_dup_bss(struct ieee80211vap *vap,
1186 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1188 struct ieee80211com *ic = vap->iv_ic;
1189 struct ieee80211_node *ni;
1191 ni = ieee80211_alloc_node(&ic->ic_sta, vap, macaddr);
1193 struct ieee80211_node *bss = vap->iv_bss;
1195 * Inherit from iv_bss.
1198 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid);
1199 ieee80211_node_set_chan(ni, bss->ni_chan);
1205 * Create a bss node for a legacy WDS vap. The far end does
1206 * not associate so we just create create a new node and
1207 * simulate an association. The caller is responsible for
1208 * installing the node as the bss node and handling any further
1209 * setup work like authorizing the port.
1211 struct ieee80211_node *
1212 ieee80211_node_create_wds(struct ieee80211vap *vap,
1213 const uint8_t bssid[IEEE80211_ADDR_LEN], struct ieee80211_channel *chan)
1215 struct ieee80211com *ic = vap->iv_ic;
1216 struct ieee80211_node *ni;
1218 /* XXX check if node already in sta table? */
1219 ni = ieee80211_alloc_node(&ic->ic_sta, vap, bssid);
1221 ni->ni_wdsvap = vap;
1222 IEEE80211_ADDR_COPY(ni->ni_bssid, bssid);
1224 * Inherit any manually configured settings.
1226 copy_bss(ni, vap->iv_bss);
1227 ieee80211_node_set_chan(ni, chan);
1228 /* NB: propagate ssid so available to WPA supplicant */
1229 ni->ni_esslen = vap->iv_des_ssid[0].len;
1230 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen);
1231 /* NB: no associd for peer */
1233 * There are no management frames to use to
1234 * discover neighbor capabilities, so blindly
1235 * propagate the local configuration.
1237 if (vap->iv_flags & IEEE80211_F_WME)
1238 ni->ni_flags |= IEEE80211_NODE_QOS;
1239 #ifdef IEEE80211_SUPPORT_SUPERG
1240 if (vap->iv_flags & IEEE80211_F_FF)
1241 ni->ni_flags |= IEEE80211_NODE_FF;
1243 if ((ic->ic_htcaps & IEEE80211_HTC_HT) &&
1244 (vap->iv_flags_ht & IEEE80211_FHT_HT)) {
1246 * Device is HT-capable and HT is enabled for
1247 * the vap; setup HT operation. On return
1248 * ni_chan will be adjusted to an HT channel.
1250 ieee80211_ht_wds_init(ni);
1252 struct ieee80211_channel *c = ni->ni_chan;
1254 * Force a legacy channel to be used.
1256 c = ieee80211_find_channel(ic,
1257 c->ic_freq, c->ic_flags &~ IEEE80211_CHAN_HT);
1258 KASSERT(c != NULL, ("no legacy channel, %u/%x",
1259 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags));
1266 struct ieee80211_node *
1267 #ifdef IEEE80211_DEBUG_REFCNT
1268 ieee80211_find_node_locked_debug(struct ieee80211_node_table *nt,
1269 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line)
1271 ieee80211_find_node_locked(struct ieee80211_node_table *nt,
1272 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1275 struct ieee80211_node *ni;
1277 #ifdef IEEE80211_DEBUG_REFCNT
1278 char ethstr[ETHER_ADDRSTRLEN + 1];
1280 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr);
1281 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) {
1282 if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) {
1283 ieee80211_ref_node(ni); /* mark referenced */
1284 #ifdef IEEE80211_DEBUG_REFCNT
1285 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1286 "%s (%s:%u) %p<%s> refcnt %d\n", __func__,
1288 ni, kether_ntoa(ni->ni_macaddr, ethstr),
1289 ieee80211_node_refcnt(ni));
1297 struct ieee80211_node *
1298 #ifdef IEEE80211_DEBUG_REFCNT
1299 ieee80211_find_node_debug(struct ieee80211_node_table *nt,
1300 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line)
1302 ieee80211_find_node(struct ieee80211_node_table *nt,
1303 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1306 struct ieee80211_node *ni;
1308 ni = ieee80211_find_node_locked(nt, macaddr);
1312 struct ieee80211_node *
1313 #ifdef IEEE80211_DEBUG_REFCNT
1314 ieee80211_find_vap_node_locked_debug(struct ieee80211_node_table *nt,
1315 const struct ieee80211vap *vap,
1316 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line)
1318 ieee80211_find_vap_node_locked(struct ieee80211_node_table *nt,
1319 const struct ieee80211vap *vap,
1320 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1323 struct ieee80211_node *ni;
1325 #ifdef IEEE80211_DEBUG_REFCNT
1326 char ethstr[ETHER_ADDRSTRLEN + 1];
1328 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr);
1329 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) {
1330 if (ni->ni_vap == vap &&
1331 IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) {
1332 ieee80211_ref_node(ni); /* mark referenced */
1333 #ifdef IEEE80211_DEBUG_REFCNT
1334 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1335 "%s (%s:%u) %p<%s> refcnt %d\n", __func__,
1337 ni, kether_ntoa(ni->ni_macaddr, ethstr),
1338 ieee80211_node_refcnt(ni));
1346 struct ieee80211_node *
1347 #ifdef IEEE80211_DEBUG_REFCNT
1348 ieee80211_find_vap_node_debug(struct ieee80211_node_table *nt,
1349 const struct ieee80211vap *vap,
1350 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line)
1352 ieee80211_find_vap_node(struct ieee80211_node_table *nt,
1353 const struct ieee80211vap *vap,
1354 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1357 struct ieee80211_node *ni;
1359 ni = ieee80211_find_vap_node_locked(nt, vap, macaddr);
1364 * Fake up a node; this handles node discovery in adhoc mode.
1365 * Note that for the driver's benefit we we treat this like
1366 * an association so the driver has an opportunity to setup
1367 * it's private state.
1369 struct ieee80211_node *
1370 ieee80211_fakeup_adhoc_node(struct ieee80211vap *vap,
1371 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1373 struct ieee80211_node *ni;
1374 #ifdef IEEE80211_DEBUG
1375 char ethstr[ETHER_ADDRSTRLEN + 1];
1378 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1379 "%s: mac<%s>\n", __func__, kether_ntoa(macaddr, ethstr));
1380 ni = ieee80211_dup_bss(vap, macaddr);
1382 struct ieee80211com *ic = vap->iv_ic;
1384 /* XXX no rate negotiation; just dup */
1385 ni->ni_rates = vap->iv_bss->ni_rates;
1386 if (ieee80211_iserp_rateset(&ni->ni_rates))
1387 ni->ni_flags |= IEEE80211_NODE_ERP;
1388 if (vap->iv_opmode == IEEE80211_M_AHDEMO) {
1390 * In adhoc demo mode there are no management
1391 * frames to use to discover neighbor capabilities,
1392 * so blindly propagate the local configuration
1393 * so we can do interesting things (e.g. use
1394 * WME to disable ACK's).
1396 if (vap->iv_flags & IEEE80211_F_WME)
1397 ni->ni_flags |= IEEE80211_NODE_QOS;
1398 #ifdef IEEE80211_SUPPORT_SUPERG
1399 if (vap->iv_flags & IEEE80211_F_FF)
1400 ni->ni_flags |= IEEE80211_NODE_FF;
1403 ieee80211_node_setuptxparms(ni);
1404 if (ic->ic_newassoc != NULL)
1405 ic->ic_newassoc(ni, 1);
1406 /* XXX not right for 802.1x/WPA */
1407 ieee80211_node_authorize(ni);
1413 ieee80211_init_neighbor(struct ieee80211_node *ni,
1414 const struct ieee80211_frame *wh,
1415 const struct ieee80211_scanparams *sp)
1417 ni->ni_esslen = sp->ssid[1];
1418 memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]);
1419 IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3);
1420 memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp));
1421 ni->ni_intval = sp->bintval;
1422 ni->ni_capinfo = sp->capinfo;
1423 ni->ni_chan = ni->ni_ic->ic_curchan;
1424 ni->ni_fhdwell = sp->fhdwell;
1425 ni->ni_fhindex = sp->fhindex;
1426 ni->ni_erp = sp->erp;
1427 ni->ni_timoff = sp->timoff;
1428 #ifdef IEEE80211_SUPPORT_MESH
1429 if (ni->ni_vap->iv_opmode == IEEE80211_M_MBSS)
1430 ieee80211_mesh_init_neighbor(ni, wh, sp);
1432 if (ieee80211_ies_init(&ni->ni_ies, sp->ies, sp->ies_len)) {
1433 ieee80211_ies_expand(&ni->ni_ies);
1434 if (ni->ni_ies.wme_ie != NULL)
1435 ni->ni_flags |= IEEE80211_NODE_QOS;
1437 ni->ni_flags &= ~IEEE80211_NODE_QOS;
1438 #ifdef IEEE80211_SUPPORT_SUPERG
1439 if (ni->ni_ies.ath_ie != NULL)
1440 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie);
1444 /* NB: must be after ni_chan is setup */
1445 ieee80211_setup_rates(ni, sp->rates, sp->xrates,
1446 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE |
1447 IEEE80211_F_DONEGO | IEEE80211_F_DODEL);
1451 * Do node discovery in adhoc mode on receipt of a beacon
1452 * or probe response frame. Note that for the driver's
1453 * benefit we we treat this like an association so the
1454 * driver has an opportunity to setup it's private state.
1456 struct ieee80211_node *
1457 ieee80211_add_neighbor(struct ieee80211vap *vap,
1458 const struct ieee80211_frame *wh,
1459 const struct ieee80211_scanparams *sp)
1461 struct ieee80211_node *ni;
1462 #ifdef IEEE80211_DEBUG
1463 char ethstr[ETHER_ADDRSTRLEN + 1];
1466 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1467 "%s: mac<%s>\n", __func__, kether_ntoa(wh->i_addr2, ethstr));
1468 ni = ieee80211_dup_bss(vap, wh->i_addr2);/* XXX alloc_node? */
1470 struct ieee80211com *ic = vap->iv_ic;
1472 ieee80211_init_neighbor(ni, wh, sp);
1473 if (ieee80211_iserp_rateset(&ni->ni_rates))
1474 ni->ni_flags |= IEEE80211_NODE_ERP;
1475 ieee80211_node_setuptxparms(ni);
1476 if (ic->ic_newassoc != NULL)
1477 ic->ic_newassoc(ni, 1);
1478 /* XXX not right for 802.1x/WPA */
1479 ieee80211_node_authorize(ni);
1484 #define IS_PROBEREQ(wh) \
1485 ((wh->i_fc[0] & (IEEE80211_FC0_TYPE_MASK|IEEE80211_FC0_SUBTYPE_MASK)) \
1486 == (IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ))
1487 #define IS_BCAST_PROBEREQ(wh) \
1488 (IS_PROBEREQ(wh) && IEEE80211_IS_MULTICAST( \
1489 ((const struct ieee80211_frame *)(wh))->i_addr3))
1491 static __inline struct ieee80211_node *
1492 _find_rxnode(struct ieee80211_node_table *nt,
1493 const struct ieee80211_frame_min *wh)
1495 if (IS_BCAST_PROBEREQ(wh))
1496 return NULL; /* spam bcast probe req to all vap's */
1497 return ieee80211_find_node_locked(nt, wh->i_addr2);
1501 * Locate the node for sender, track state, and then pass the
1502 * (referenced) node up to the 802.11 layer for its use. Note
1503 * we can return NULL if the sender is not in the table.
1505 struct ieee80211_node *
1506 #ifdef IEEE80211_DEBUG_REFCNT
1507 ieee80211_find_rxnode_debug(struct ieee80211com *ic,
1508 const struct ieee80211_frame_min *wh, const char *func, int line)
1510 ieee80211_find_rxnode(struct ieee80211com *ic,
1511 const struct ieee80211_frame_min *wh)
1514 struct ieee80211_node_table *nt;
1515 struct ieee80211_node *ni;
1518 ni = _find_rxnode(nt, wh);
1524 * Like ieee80211_find_rxnode but use the supplied h/w
1525 * key index as a hint to locate the node in the key
1526 * mapping table. If an entry is present at the key
1527 * index we return it; otherwise do a normal lookup and
1528 * update the mapping table if the station has a unicast
1529 * key assigned to it.
1531 struct ieee80211_node *
1532 #ifdef IEEE80211_DEBUG_REFCNT
1533 ieee80211_find_rxnode_withkey_debug(struct ieee80211com *ic,
1534 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix,
1535 const char *func, int line)
1537 ieee80211_find_rxnode_withkey(struct ieee80211com *ic,
1538 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix)
1541 struct ieee80211_node_table *nt;
1542 struct ieee80211_node *ni;
1543 #ifdef IEEE80211_DEBUG
1544 char ethstr[ETHER_ADDRSTRLEN + 1];
1548 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax)
1549 ni = nt->nt_keyixmap[keyix];
1553 ni = _find_rxnode(nt, wh);
1554 if (ni != NULL && nt->nt_keyixmap != NULL) {
1556 * If the station has a unicast key cache slot
1557 * assigned update the key->node mapping table.
1559 keyix = ni->ni_ucastkey.wk_rxkeyix;
1560 /* XXX can keyixmap[keyix] != NULL? */
1561 if (keyix < nt->nt_keyixmax &&
1562 nt->nt_keyixmap[keyix] == NULL) {
1563 IEEE80211_DPRINTF(ni->ni_vap,
1565 "%s: add key map entry %p<%s> refcnt %d\n",
1566 __func__, ni, kether_ntoa(ni->ni_macaddr, ethstr),
1567 ieee80211_node_refcnt(ni)+1);
1568 nt->nt_keyixmap[keyix] = ieee80211_ref_node(ni);
1572 if (IS_BCAST_PROBEREQ(wh))
1573 ni = NULL; /* spam bcast probe req to all vap's */
1575 ieee80211_ref_node(ni);
1579 #undef IS_BCAST_PROBEREQ
1583 * Return a reference to the appropriate node for sending
1584 * a data frame. This handles node discovery in adhoc networks.
1586 struct ieee80211_node *
1587 #ifdef IEEE80211_DEBUG_REFCNT
1588 ieee80211_find_txnode_debug(struct ieee80211vap *vap,
1589 const uint8_t macaddr[IEEE80211_ADDR_LEN],
1590 const char *func, int line)
1592 ieee80211_find_txnode(struct ieee80211vap *vap,
1593 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1596 struct ieee80211_node_table *nt = &vap->iv_ic->ic_sta;
1597 struct ieee80211_node *ni;
1600 * The destination address should be in the node table
1601 * unless this is a multicast/broadcast frame. We can
1602 * also optimize station mode operation, all frames go
1605 /* XXX can't hold lock across dup_bss 'cuz of recursive locking */
1606 if (vap->iv_opmode == IEEE80211_M_STA ||
1607 vap->iv_opmode == IEEE80211_M_WDS ||
1608 IEEE80211_IS_MULTICAST(macaddr))
1609 ni = ieee80211_ref_node(vap->iv_bss);
1611 ni = ieee80211_find_node_locked(nt, macaddr);
1614 if (vap->iv_opmode == IEEE80211_M_IBSS ||
1615 vap->iv_opmode == IEEE80211_M_AHDEMO) {
1617 * In adhoc mode cons up a node for the destination.
1618 * Note that we need an additional reference for the
1619 * caller to be consistent with
1620 * ieee80211_find_node_locked.
1622 ni = ieee80211_fakeup_adhoc_node(vap, macaddr);
1624 (void) ieee80211_ref_node(ni);
1626 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, macaddr,
1627 "no node, discard frame (%s)", __func__);
1628 vap->iv_stats.is_tx_nonode++;
1635 _ieee80211_free_node(struct ieee80211_node *ni)
1637 struct ieee80211_node_table *nt = ni->ni_table;
1640 * NB: careful about referencing the vap as it may be
1641 * gone if the last reference was held by a driver.
1642 * We know the com will always be present so it's safe
1643 * to use ni_ic below to reclaim resources.
1646 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1647 "%s %p<%s> in %s table\n", __func__, ni,
1648 kether_ntoa(ni->ni_macaddr, ethstr),
1649 nt != NULL ? nt->nt_name : "<gone>");
1651 if (ni->ni_associd != 0) {
1652 struct ieee80211vap *vap = ni->ni_vap;
1653 if (vap->iv_aid_bitmap != NULL)
1654 IEEE80211_AID_CLR(vap, ni->ni_associd);
1657 TAILQ_REMOVE(&nt->nt_node, ni, ni_list);
1658 LIST_REMOVE(ni, ni_hash);
1660 ni->ni_ic->ic_node_free(ni);
1664 #ifdef IEEE80211_DEBUG_REFCNT
1665 ieee80211_free_node_debug(struct ieee80211_node *ni, const char *func, int line)
1667 ieee80211_free_node(struct ieee80211_node *ni)
1670 struct ieee80211_node_table *nt = ni->ni_table;
1671 #ifdef IEEE80211_DEBUG
1672 char ethstr[ETHER_ADDRSTRLEN + 1];
1675 #ifdef IEEE80211_DEBUG_REFCNT
1676 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1677 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni,
1678 kether_ntoa(ni->ni_macaddr, ethstr), ieee80211_node_refcnt(ni)-1);
1681 if (ieee80211_node_dectestref(ni)) {
1683 * Last reference, reclaim state.
1685 _ieee80211_free_node(ni);
1686 } else if (ieee80211_node_refcnt(ni) == 1 &&
1687 nt->nt_keyixmap != NULL) {
1688 ieee80211_keyix keyix;
1690 * Check for a last reference in the key mapping table.
1692 keyix = ni->ni_ucastkey.wk_rxkeyix;
1693 if (keyix < nt->nt_keyixmax &&
1694 nt->nt_keyixmap[keyix] == ni) {
1695 IEEE80211_DPRINTF(ni->ni_vap,
1697 "%s: %p<%s> clear key map entry", __func__,
1698 ni, kether_ntoa(ni->ni_macaddr, ethstr));
1699 nt->nt_keyixmap[keyix] = NULL;
1700 ieee80211_node_decref(ni); /* XXX needed? */
1701 _ieee80211_free_node(ni);
1705 if (ieee80211_node_dectestref(ni))
1706 _ieee80211_free_node(ni);
1711 * Reclaim a unicast key and clear any key cache state.
1714 ieee80211_node_delucastkey(struct ieee80211_node *ni)
1716 struct ieee80211com *ic = ni->ni_ic;
1717 struct ieee80211_node_table *nt = &ic->ic_sta;
1718 struct ieee80211_node *nikey;
1719 ieee80211_keyix keyix;
1721 #ifdef IEEE80211_DEBUG
1722 char ethstr[ETHER_ADDRSTRLEN + 1];
1726 * NB: We must beware of LOR here; deleting the key
1727 * can cause the crypto layer to block traffic updates
1728 * which can generate a LOR against the node table lock;
1729 * grab it here and stash the key index for our use below.
1731 * Must also beware of recursion on the node table lock.
1732 * When called from node_cleanup we may already have
1733 * the node table lock held. Unfortunately there's no
1734 * way to separate out this path so we must do this
1738 status = 1; /* NB: success */
1739 if (ni->ni_ucastkey.wk_keyix != IEEE80211_KEYIX_NONE) {
1740 keyix = ni->ni_ucastkey.wk_rxkeyix;
1741 status = ieee80211_crypto_delkey(ni->ni_vap, &ni->ni_ucastkey);
1742 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) {
1743 nikey = nt->nt_keyixmap[keyix];
1744 nt->nt_keyixmap[keyix] = NULL;
1748 if (nikey != NULL) {
1749 KASSERT(nikey == ni,
1750 ("key map out of sync, ni %p nikey %p", ni, nikey));
1751 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1752 "%s: delete key map entry %p<%s> refcnt %d\n",
1753 __func__, ni, kether_ntoa(ni->ni_macaddr, ethstr),
1754 ieee80211_node_refcnt(ni)-1);
1755 ieee80211_free_node(ni);
1761 * Reclaim a node. If this is the last reference count then
1762 * do the normal free work. Otherwise remove it from the node
1763 * table and mark it gone by clearing the back-reference.
1766 node_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni)
1768 ieee80211_keyix keyix;
1769 #ifdef IEEE80211_DEBUG
1770 char ethstr[ETHER_ADDRSTRLEN + 1];
1773 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1774 "%s: remove %p<%s> from %s table, refcnt %d\n",
1775 __func__, ni, kether_ntoa(ni->ni_macaddr, ethstr),
1776 nt->nt_name, ieee80211_node_refcnt(ni)-1);
1778 * Clear any entry in the unicast key mapping table.
1779 * We need to do it here so rx lookups don't find it
1780 * in the mapping table even if it's not in the hash
1781 * table. We cannot depend on the mapping table entry
1782 * being cleared because the node may not be free'd.
1784 keyix = ni->ni_ucastkey.wk_rxkeyix;
1785 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax &&
1786 nt->nt_keyixmap[keyix] == ni) {
1787 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1788 "%s: %p<%s> clear key map entry %u\n",
1789 __func__, ni, kether_ntoa(ni->ni_macaddr, ethstr), keyix);
1790 nt->nt_keyixmap[keyix] = NULL;
1791 ieee80211_node_decref(ni); /* NB: don't need free */
1793 if (!ieee80211_node_dectestref(ni)) {
1795 * Other references are present, just remove the
1796 * node from the table so it cannot be found. When
1797 * the references are dropped storage will be
1800 TAILQ_REMOVE(&nt->nt_node, ni, ni_list);
1801 LIST_REMOVE(ni, ni_hash);
1802 ni->ni_table = NULL; /* clear reference */
1804 _ieee80211_free_node(ni);
1808 * Node table support.
1812 ieee80211_node_table_init(struct ieee80211com *ic,
1813 struct ieee80211_node_table *nt,
1814 const char *name, int inact, int keyixmax)
1817 TAILQ_INIT(&nt->nt_node);
1820 nt->nt_inact_init = inact;
1821 nt->nt_keyixmax = keyixmax;
1822 if (nt->nt_keyixmax > 0) {
1823 nt->nt_keyixmap = (struct ieee80211_node **) kmalloc(
1824 keyixmax * sizeof(struct ieee80211_node *),
1825 M_80211_NODE, M_INTWAIT | M_ZERO);
1826 if (nt->nt_keyixmap == NULL)
1827 if_printf(ic->ic_ifp,
1828 "Cannot allocate key index map with %u entries\n",
1831 nt->nt_keyixmap = NULL;
1835 ieee80211_node_table_reset(struct ieee80211_node_table *nt,
1836 struct ieee80211vap *match)
1838 struct ieee80211_node *ni, *next;
1840 TAILQ_FOREACH_MUTABLE(ni, &nt->nt_node, ni_list, next) {
1841 if (match != NULL && ni->ni_vap != match)
1843 /* XXX can this happen? if so need's work */
1844 if (ni->ni_associd != 0) {
1845 struct ieee80211vap *vap = ni->ni_vap;
1847 if (vap->iv_auth->ia_node_leave != NULL)
1848 vap->iv_auth->ia_node_leave(ni);
1849 if (vap->iv_aid_bitmap != NULL)
1850 IEEE80211_AID_CLR(vap, ni->ni_associd);
1852 ni->ni_wdsvap = NULL; /* clear reference */
1853 node_reclaim(nt, ni);
1855 if (match != NULL && match->iv_opmode == IEEE80211_M_WDS) {
1857 * Make a separate pass to clear references to this vap
1858 * held by DWDS entries. They will not be matched above
1859 * because ni_vap will point to the ap vap but we still
1860 * need to clear ni_wdsvap when the WDS vap is destroyed
1863 TAILQ_FOREACH_MUTABLE(ni, &nt->nt_node, ni_list, next)
1864 if (ni->ni_wdsvap == match)
1865 ni->ni_wdsvap = NULL;
1870 ieee80211_node_table_cleanup(struct ieee80211_node_table *nt)
1872 ieee80211_node_table_reset(nt, NULL);
1873 if (nt->nt_keyixmap != NULL) {
1875 /* XXX verify all entries are NULL */
1877 for (i = 0; i < nt->nt_keyixmax; i++)
1878 if (nt->nt_keyixmap[i] != NULL)
1879 kprintf("%s: %s[%u] still active\n", __func__,
1882 kfree(nt->nt_keyixmap, M_80211_NODE);
1883 nt->nt_keyixmap = NULL;
1888 * Timeout inactive stations and do related housekeeping.
1889 * Note that we cannot hold the node lock while sending a
1890 * frame as this would lead to a LOR. Instead we use a
1891 * generation number to mark nodes that we've scanned and
1892 * drop the lock and restart a scan if we have to time out
1893 * a node. Since we are single-threaded by virtue of
1894 * controlling the inactivity timer we can be sure this will
1895 * process each node only once.
1898 ieee80211_timeout_stations(struct ieee80211com *ic)
1900 struct ieee80211_node_table *nt = &ic->ic_sta;
1901 struct ieee80211vap *vap;
1902 struct ieee80211_node *ni;
1905 gen = ++nt->nt_scangen;
1907 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) {
1908 if (ni->ni_scangen == gen) /* previously handled */
1910 ni->ni_scangen = gen;
1912 * Ignore entries for which have yet to receive an
1913 * authentication frame. These are transient and
1914 * will be reclaimed when the last reference to them
1915 * goes away (when frame xmits complete).
1919 * Only process stations when in RUN state. This
1920 * insures, for example, that we don't timeout an
1921 * inactive station during CAC. Note that CSA state
1922 * is actually handled in ieee80211_node_timeout as
1923 * it applies to more than timeout processing.
1925 if (vap->iv_state != IEEE80211_S_RUN)
1927 /* XXX can vap be NULL? */
1928 if ((vap->iv_opmode == IEEE80211_M_HOSTAP ||
1929 vap->iv_opmode == IEEE80211_M_STA) &&
1930 (ni->ni_flags & IEEE80211_NODE_AREF) == 0)
1933 * Free fragment if not needed anymore
1934 * (last fragment older than 1s).
1935 * XXX doesn't belong here, move to node_age
1937 if (ni->ni_rxfrag[0] != NULL &&
1938 ticks > ni->ni_rxfragstamp + hz) {
1939 m_freem(ni->ni_rxfrag[0]);
1940 ni->ni_rxfrag[0] = NULL;
1942 if (ni->ni_inact > 0) {
1944 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni,
1945 "%s: inact %u inact_reload %u nrates %u",
1946 __func__, ni->ni_inact, ni->ni_inact_reload,
1947 ni->ni_rates.rs_nrates);
1950 * Special case ourself; we may be idle for extended periods
1951 * of time and regardless reclaiming our state is wrong.
1952 * XXX run ic_node_age
1954 if (ni == vap->iv_bss)
1956 if (ni->ni_associd != 0 ||
1957 (vap->iv_opmode == IEEE80211_M_IBSS ||
1958 vap->iv_opmode == IEEE80211_M_AHDEMO)) {
1960 * Age/drain resources held by the station.
1962 ic->ic_node_age(ni);
1964 * Probe the station before time it out. We
1965 * send a null data frame which may not be
1966 * universally supported by drivers (need it
1967 * for ps-poll support so it should be...).
1969 * XXX don't probe the station unless we've
1970 * received a frame from them (and have
1971 * some idea of the rates they are capable
1972 * of); this will get fixed more properly
1973 * soon with better handling of the rate set.
1975 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) &&
1976 (0 < ni->ni_inact &&
1977 ni->ni_inact <= vap->iv_inact_probe) &&
1978 ni->ni_rates.rs_nrates != 0) {
1980 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE,
1982 "probe station due to inactivity");
1984 * Grab a reference before unlocking the table
1985 * so the node cannot be reclaimed before we
1986 * send the frame. ieee80211_send_nulldata
1987 * understands we've done this and reclaims the
1988 * ref for us as needed.
1990 ieee80211_ref_node(ni);
1991 ieee80211_send_nulldata(ni);
1996 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) &&
1997 ni->ni_inact <= 0) {
1999 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, ni,
2000 "station timed out due to inactivity "
2001 "(refcnt %u)", ieee80211_node_refcnt(ni));
2003 * Send a deauthenticate frame and drop the station.
2004 * This is somewhat complicated due to reference counts
2005 * and locking. At this point a station will typically
2006 * have a reference count of 1. ieee80211_node_leave
2007 * will do a "free" of the node which will drop the
2008 * reference count. But in the meantime a reference
2009 * wil be held by the deauth frame. The actual reclaim
2010 * of the node will happen either after the tx is
2011 * completed or by ieee80211_node_leave.
2013 * Separately we must drop the node lock before sending
2014 * in case the driver takes a lock, as this can result
2015 * in a LOR between the node lock and the driver lock.
2017 ieee80211_ref_node(ni);
2018 if (ni->ni_associd != 0) {
2019 IEEE80211_SEND_MGMT(ni,
2020 IEEE80211_FC0_SUBTYPE_DEAUTH,
2021 IEEE80211_REASON_AUTH_EXPIRE);
2023 ieee80211_node_leave(ni);
2024 ieee80211_free_node(ni);
2025 vap->iv_stats.is_node_timeout++;
2032 * Aggressively reclaim resources. This should be used
2033 * only in a critical situation to reclaim mbuf resources.
2036 ieee80211_drain(struct ieee80211com *ic)
2038 struct ieee80211_node_table *nt = &ic->ic_sta;
2039 struct ieee80211vap *vap;
2040 struct ieee80211_node *ni;
2042 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) {
2044 * Ignore entries for which have yet to receive an
2045 * authentication frame. These are transient and
2046 * will be reclaimed when the last reference to them
2047 * goes away (when frame xmits complete).
2051 * Only process stations when in RUN state. This
2052 * insures, for example, that we don't timeout an
2053 * inactive station during CAC. Note that CSA state
2054 * is actually handled in ieee80211_node_timeout as
2055 * it applies to more than timeout processing.
2057 if (vap->iv_state != IEEE80211_S_RUN)
2059 /* XXX can vap be NULL? */
2060 if ((vap->iv_opmode == IEEE80211_M_HOSTAP ||
2061 vap->iv_opmode == IEEE80211_M_STA) &&
2062 (ni->ni_flags & IEEE80211_NODE_AREF) == 0)
2066 * XXX doesn't belong here, move to node_drain
2068 if (ni->ni_rxfrag[0] != NULL) {
2069 m_freem(ni->ni_rxfrag[0]);
2070 ni->ni_rxfrag[0] = NULL;
2073 * Drain resources held by the station.
2075 ic->ic_node_drain(ni);
2080 * Per-ieee80211com inactivity timer callback.
2083 ieee80211_node_timeout_callout(void *arg)
2085 struct ieee80211com *ic = arg;
2088 * Defer timeout processing if a channel switch is pending.
2089 * We typically need to be mute so not doing things that
2090 * might generate frames is good to handle in one place.
2091 * Supressing the station timeout processing may extend the
2092 * lifetime of inactive stations (by not decrementing their
2093 * idle counters) but this should be ok unless the CSA is
2094 * active for an unusually long time.
2096 wlan_serialize_enter();
2097 if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) {
2098 ieee80211_scan_timeout(ic);
2099 ieee80211_timeout_stations(ic);
2100 ieee80211_ageq_age(&ic->ic_stageq, IEEE80211_INACT_WAIT);
2102 ieee80211_erp_timeout(ic);
2103 ieee80211_ht_timeout(ic);
2105 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz,
2106 ieee80211_node_timeout_callout, ic);
2107 wlan_serialize_exit();
2111 ieee80211_iterate_nodes(struct ieee80211_node_table *nt,
2112 ieee80211_iter_func *f, void *arg)
2114 struct ieee80211_node *ni;
2117 gen = ++nt->nt_scangen;
2119 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) {
2120 if (ni->ni_scangen != gen) {
2121 ni->ni_scangen = gen;
2122 (void) ieee80211_ref_node(ni);
2124 ieee80211_free_node(ni);
2131 ieee80211_dump_node(struct ieee80211_node_table *nt, struct ieee80211_node *ni)
2133 char ethstr[ETHER_ADDRSTRLEN + 1];
2135 kprintf("0x%p: mac %s refcnt %d\n", ni, kether_ntoa(ni->ni_macaddr, ethstr),
2136 ieee80211_node_refcnt(ni));
2137 kprintf("\tscangen %u authmode %u flags 0x%x\n",
2138 ni->ni_scangen, ni->ni_authmode, ni->ni_flags);
2139 kprintf("\tassocid 0x%x txpower %u vlan %u\n",
2140 ni->ni_associd, ni->ni_txpower, ni->ni_vlan);
2141 kprintf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n",
2142 ni->ni_txseqs[IEEE80211_NONQOS_TID],
2143 ni->ni_rxseqs[IEEE80211_NONQOS_TID] >> IEEE80211_SEQ_SEQ_SHIFT,
2144 ni->ni_rxseqs[IEEE80211_NONQOS_TID] & IEEE80211_SEQ_FRAG_MASK,
2145 ni->ni_rxfragstamp);
2146 kprintf("\trssi %d noise %d intval %u capinfo 0x%x\n",
2147 node_getrssi(ni), ni->ni_noise,
2148 ni->ni_intval, ni->ni_capinfo);
2149 kprintf("\tbssid %s essid \"%.*s\" channel %u:0x%x\n",
2150 kether_ntoa(ni->ni_bssid, ethstr),
2151 ni->ni_esslen, ni->ni_essid,
2152 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags);
2153 kprintf("\tinact %u inact_reload %u txrate %u\n",
2154 ni->ni_inact, ni->ni_inact_reload, ni->ni_txrate);
2155 kprintf("\thtcap %x htparam %x htctlchan %u ht2ndchan %u\n",
2156 ni->ni_htcap, ni->ni_htparam,
2157 ni->ni_htctlchan, ni->ni_ht2ndchan);
2158 kprintf("\thtopmode %x htstbc %x chw %u\n",
2159 ni->ni_htopmode, ni->ni_htstbc, ni->ni_chw);
2163 ieee80211_dump_nodes(struct ieee80211_node_table *nt)
2165 ieee80211_iterate_nodes(nt,
2166 (ieee80211_iter_func *) ieee80211_dump_node, nt);
2170 ieee80211_notify_erp_locked(struct ieee80211com *ic)
2172 struct ieee80211vap *vap;
2174 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
2175 if (vap->iv_opmode == IEEE80211_M_HOSTAP)
2176 ieee80211_beacon_notify(vap, IEEE80211_BEACON_ERP);
2180 ieee80211_notify_erp(struct ieee80211com *ic)
2182 ieee80211_notify_erp_locked(ic);
2186 * Handle a station joining an 11g network.
2189 ieee80211_node_join_11g(struct ieee80211_node *ni)
2191 struct ieee80211com *ic = ni->ni_ic;
2194 * Station isn't capable of short slot time. Bump
2195 * the count of long slot time stations and disable
2196 * use of short slot time. Note that the actual switch
2197 * over to long slot time use may not occur until the
2198 * next beacon transmission (per sec. 7.3.1.4 of 11g).
2200 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) {
2201 ic->ic_longslotsta++;
2202 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2203 "station needs long slot time, count %d",
2204 ic->ic_longslotsta);
2205 /* XXX vap's w/ conflicting needs won't work */
2206 if (!IEEE80211_IS_CHAN_108G(ic->ic_bsschan)) {
2208 * Don't force slot time when switched to turbo
2209 * mode as non-ERP stations won't be present; this
2210 * need only be done when on the normal G channel.
2212 ieee80211_set_shortslottime(ic, 0);
2216 * If the new station is not an ERP station
2217 * then bump the counter and enable protection
2220 if (!ieee80211_iserp_rateset(&ni->ni_rates)) {
2222 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2223 "station is !ERP, %d non-ERP stations associated",
2226 * If station does not support short preamble
2227 * then we must enable use of Barker preamble.
2229 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) {
2230 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2231 "%s", "station needs long preamble");
2232 ic->ic_flags |= IEEE80211_F_USEBARKER;
2233 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE;
2236 * If protection is configured and this is the first
2237 * indication we should use protection, enable it.
2239 if (ic->ic_protmode != IEEE80211_PROT_NONE &&
2240 ic->ic_nonerpsta == 1 &&
2241 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) {
2242 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC,
2243 "%s: enable use of protection\n", __func__);
2244 ic->ic_flags |= IEEE80211_F_USEPROT;
2245 ieee80211_notify_erp_locked(ic);
2248 ni->ni_flags |= IEEE80211_NODE_ERP;
2252 ieee80211_node_join(struct ieee80211_node *ni, int resp)
2254 struct ieee80211com *ic = ni->ni_ic;
2255 struct ieee80211vap *vap = ni->ni_vap;
2258 if (ni->ni_associd == 0) {
2261 KASSERT(vap->iv_aid_bitmap != NULL, ("no aid bitmap"));
2263 * It would be good to search the bitmap
2264 * more efficiently, but this will do for now.
2266 for (aid = 1; aid < vap->iv_max_aid; aid++) {
2267 if (!IEEE80211_AID_ISSET(vap, aid))
2270 if (aid >= vap->iv_max_aid) {
2271 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_TOOMANY);
2272 ieee80211_node_leave(ni);
2275 ni->ni_associd = aid | 0xc000;
2276 ni->ni_jointime = time_second;
2277 IEEE80211_AID_SET(vap, ni->ni_associd);
2278 vap->iv_sta_assoc++;
2281 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan))
2282 ieee80211_ht_node_join(ni);
2283 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) &&
2284 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan))
2285 ieee80211_node_join_11g(ni);
2291 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni,
2292 "station associated at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s",
2293 IEEE80211_NODE_AID(ni),
2294 ic->ic_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long",
2295 ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long",
2296 ic->ic_flags & IEEE80211_F_USEPROT ? ", protection" : "",
2297 ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "",
2298 ni->ni_flags & IEEE80211_NODE_HT ?
2299 (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "",
2300 ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "",
2301 ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" :
2302 ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "",
2303 ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "",
2304 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ?
2305 ", fast-frames" : "",
2306 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ?
2310 ieee80211_node_setuptxparms(ni);
2311 /* give driver a chance to setup state like ni_txrate */
2312 if (ic->ic_newassoc != NULL)
2313 ic->ic_newassoc(ni, newassoc);
2314 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_SUCCESS);
2315 /* tell the authenticator about new station */
2316 if (vap->iv_auth->ia_node_join != NULL)
2317 vap->iv_auth->ia_node_join(ni);
2318 ieee80211_notify_node_join(ni,
2319 resp == IEEE80211_FC0_SUBTYPE_ASSOC_RESP);
2323 disable_protection(struct ieee80211com *ic)
2325 KASSERT(ic->ic_nonerpsta == 0 &&
2326 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0,
2327 ("%d non ERP stations, flags 0x%x", ic->ic_nonerpsta,
2330 ic->ic_flags &= ~IEEE80211_F_USEPROT;
2331 /* XXX verify mode? */
2332 if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) {
2333 ic->ic_flags |= IEEE80211_F_SHPREAMBLE;
2334 ic->ic_flags &= ~IEEE80211_F_USEBARKER;
2336 ieee80211_notify_erp_locked(ic);
2340 * Handle a station leaving an 11g network.
2343 ieee80211_node_leave_11g(struct ieee80211_node *ni)
2345 struct ieee80211com *ic = ni->ni_ic;
2347 KASSERT(IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan),
2348 ("not in 11g, bss %u:0x%x", ic->ic_bsschan->ic_freq,
2349 ic->ic_bsschan->ic_flags));
2352 * If a long slot station do the slot time bookkeeping.
2354 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) {
2355 KASSERT(ic->ic_longslotsta > 0,
2356 ("bogus long slot station count %d", ic->ic_longslotsta));
2357 ic->ic_longslotsta--;
2358 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2359 "long slot time station leaves, count now %d",
2360 ic->ic_longslotsta);
2361 if (ic->ic_longslotsta == 0) {
2363 * Re-enable use of short slot time if supported
2364 * and not operating in IBSS mode (per spec).
2366 if ((ic->ic_caps & IEEE80211_C_SHSLOT) &&
2367 ic->ic_opmode != IEEE80211_M_IBSS) {
2368 IEEE80211_DPRINTF(ni->ni_vap,
2369 IEEE80211_MSG_ASSOC,
2370 "%s: re-enable use of short slot time\n",
2372 ieee80211_set_shortslottime(ic, 1);
2377 * If a non-ERP station do the protection-related bookkeeping.
2379 if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) {
2380 KASSERT(ic->ic_nonerpsta > 0,
2381 ("bogus non-ERP station count %d", ic->ic_nonerpsta));
2383 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2384 "non-ERP station leaves, count now %d%s", ic->ic_nonerpsta,
2385 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) ?
2386 " (non-ERP sta present)" : "");
2387 if (ic->ic_nonerpsta == 0 &&
2388 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) {
2389 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC,
2390 "%s: disable use of protection\n", __func__);
2391 disable_protection(ic);
2397 * Time out presence of an overlapping bss with non-ERP
2398 * stations. When operating in hostap mode we listen for
2399 * beacons from other stations and if we identify a non-ERP
2400 * station is present we enable protection. To identify
2401 * when all non-ERP stations are gone we time out this
2405 ieee80211_erp_timeout(struct ieee80211com *ic)
2407 if ((ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) &&
2408 time_after(ticks, ic->ic_lastnonerp + IEEE80211_NONERP_PRESENT_AGE)) {
2410 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni,
2411 "%s", "age out non-ERP sta present on channel");
2413 ic->ic_flags_ext &= ~IEEE80211_FEXT_NONERP_PR;
2414 if (ic->ic_nonerpsta == 0)
2415 disable_protection(ic);
2420 * Handle bookkeeping for station deauthentication/disassociation
2421 * when operating as an ap.
2424 ieee80211_node_leave(struct ieee80211_node *ni)
2426 struct ieee80211com *ic = ni->ni_ic;
2427 struct ieee80211vap *vap = ni->ni_vap;
2428 struct ieee80211_node_table *nt = ni->ni_table;
2430 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni,
2431 "station with aid %d leaves", IEEE80211_NODE_AID(ni));
2433 KASSERT(vap->iv_opmode != IEEE80211_M_STA,
2434 ("unexpected operating mode %u", vap->iv_opmode));
2436 * If node wasn't previously associated all
2437 * we need to do is reclaim the reference.
2439 /* XXX ibss mode bypasses 11g and notification */
2440 if (ni->ni_associd == 0)
2443 * Tell the authenticator the station is leaving.
2444 * Note that we must do this before yanking the
2445 * association id as the authenticator uses the
2446 * associd to locate it's state block.
2448 if (vap->iv_auth->ia_node_leave != NULL)
2449 vap->iv_auth->ia_node_leave(ni);
2451 IEEE80211_AID_CLR(vap, ni->ni_associd);
2453 vap->iv_sta_assoc--;
2456 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan))
2457 ieee80211_ht_node_leave(ni);
2458 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) &&
2459 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan))
2460 ieee80211_node_leave_11g(ni);
2462 * Cleanup station state. In particular clear various
2463 * state that might otherwise be reused if the node
2464 * is reused before the reference count goes to zero
2465 * (and memory is reclaimed).
2467 ieee80211_sta_leave(ni);
2470 * Remove the node from any table it's recorded in and
2471 * drop the caller's reference. Removal from the table
2472 * is important to insure the node is not reprocessed
2476 node_reclaim(nt, ni);
2478 ieee80211_free_node(ni);
2482 struct ieee80211vap *vap;
2484 uint32_t rssi_total;
2488 get_hostap_rssi(void *arg, struct ieee80211_node *ni)
2490 struct rssiinfo *info = arg;
2491 struct ieee80211vap *vap = ni->ni_vap;
2494 if (info->vap != vap)
2496 /* only associated stations */
2497 if (ni->ni_associd == 0)
2499 rssi = vap->iv_ic->ic_node_getrssi(ni);
2501 info->rssi_samples++;
2502 info->rssi_total += rssi;
2507 get_adhoc_rssi(void *arg, struct ieee80211_node *ni)
2509 struct rssiinfo *info = arg;
2510 struct ieee80211vap *vap = ni->ni_vap;
2513 if (info->vap != vap)
2515 /* only neighbors */
2516 /* XXX check bssid */
2517 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0)
2519 rssi = vap->iv_ic->ic_node_getrssi(ni);
2521 info->rssi_samples++;
2522 info->rssi_total += rssi;
2526 #ifdef IEEE80211_SUPPORT_MESH
2528 get_mesh_rssi(void *arg, struct ieee80211_node *ni)
2530 struct rssiinfo *info = arg;
2531 struct ieee80211vap *vap = ni->ni_vap;
2534 if (info->vap != vap)
2536 /* only neighbors that peered successfully */
2537 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED)
2539 rssi = vap->iv_ic->ic_node_getrssi(ni);
2541 info->rssi_samples++;
2542 info->rssi_total += rssi;
2545 #endif /* IEEE80211_SUPPORT_MESH */
2548 ieee80211_getrssi(struct ieee80211vap *vap)
2550 #define NZ(x) ((x) == 0 ? 1 : (x))
2551 struct ieee80211com *ic = vap->iv_ic;
2552 struct rssiinfo info;
2554 info.rssi_total = 0;
2555 info.rssi_samples = 0;
2557 switch (vap->iv_opmode) {
2558 case IEEE80211_M_IBSS: /* average of all ibss neighbors */
2559 case IEEE80211_M_AHDEMO: /* average of all neighbors */
2560 ieee80211_iterate_nodes(&ic->ic_sta, get_adhoc_rssi, &info);
2562 case IEEE80211_M_HOSTAP: /* average of all associated stations */
2563 ieee80211_iterate_nodes(&ic->ic_sta, get_hostap_rssi, &info);
2565 #ifdef IEEE80211_SUPPORT_MESH
2566 case IEEE80211_M_MBSS: /* average of all mesh neighbors */
2567 ieee80211_iterate_nodes(&ic->ic_sta, get_mesh_rssi, &info);
2570 case IEEE80211_M_MONITOR: /* XXX */
2571 case IEEE80211_M_STA: /* use stats from associated ap */
2573 if (vap->iv_bss != NULL)
2574 info.rssi_total = ic->ic_node_getrssi(vap->iv_bss);
2575 info.rssi_samples = 1;
2578 return info.rssi_total / NZ(info.rssi_samples);
2583 ieee80211_getsignal(struct ieee80211vap *vap, int8_t *rssi, int8_t *noise)
2586 if (vap->iv_bss == NULL) /* NB: shouldn't happen */
2588 vap->iv_ic->ic_node_getsignal(vap->iv_bss, rssi, noise);
2589 /* for non-station mode return avg'd rssi accounting */
2590 if (vap->iv_opmode != IEEE80211_M_STA)
2591 *rssi = ieee80211_getrssi(vap);