2 * Copyright (c) 2001 Atsushi Onoe
3 * Copyright (c) 2002-2005 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.
14 * 3. The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
17 * Alternatively, this software may be distributed under the terms of the
18 * GNU General Public License ("GPL") version 2 as published by the Free
19 * Software Foundation.
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD$");
36 #include <sys/param.h>
37 #include <sys/systm.h>
39 #include <sys/malloc.h>
40 #include <sys/kernel.h>
42 #include <sys/socket.h>
45 #include <net/if_media.h>
46 #include <net/ethernet.h>
48 #include <net80211/ieee80211_var.h>
53 * Association id's are managed with a bit vector.
55 #define IEEE80211_AID_SET(b, w) \
56 ((w)[IEEE80211_AID(b) / 32] |= (1 << (IEEE80211_AID(b) % 32)))
57 #define IEEE80211_AID_CLR(b, w) \
58 ((w)[IEEE80211_AID(b) / 32] &= ~(1 << (IEEE80211_AID(b) % 32)))
59 #define IEEE80211_AID_ISSET(b, w) \
60 ((w)[IEEE80211_AID(b) / 32] & (1 << (IEEE80211_AID(b) % 32)))
62 #ifdef IEEE80211_DEBUG_REFCNT
63 #define REFCNT_LOC "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line
65 #define REFCNT_LOC "%s %p<%s> refcnt %d\n", __func__
68 static struct ieee80211_node *node_alloc(struct ieee80211_node_table *);
69 static void node_cleanup(struct ieee80211_node *);
70 static void node_free(struct ieee80211_node *);
71 static u_int8_t node_getrssi(const struct ieee80211_node *);
73 static void ieee80211_setup_node(struct ieee80211_node_table *,
74 struct ieee80211_node *, const u_int8_t *);
75 static void _ieee80211_free_node(struct ieee80211_node *);
76 static void ieee80211_free_allnodes(struct ieee80211_node_table *);
78 static void ieee80211_timeout_scan_candidates(struct ieee80211_node_table *);
79 static void ieee80211_timeout_stations(struct ieee80211_node_table *);
81 static void ieee80211_set_tim(struct ieee80211_node *, int set);
83 static void ieee80211_node_table_init(struct ieee80211com *ic,
84 struct ieee80211_node_table *nt, const char *name,
85 int inact, int keyixmax,
86 void (*timeout)(struct ieee80211_node_table *));
87 static void ieee80211_node_table_cleanup(struct ieee80211_node_table *nt);
89 MALLOC_DEFINE(M_80211_NODE, "80211node", "802.11 node state");
92 ieee80211_node_attach(struct ieee80211com *ic)
95 ic->ic_node_alloc = node_alloc;
96 ic->ic_node_free = node_free;
97 ic->ic_node_cleanup = node_cleanup;
98 ic->ic_node_getrssi = node_getrssi;
100 /* default station inactivity timer setings */
101 ic->ic_inact_init = IEEE80211_INACT_INIT;
102 ic->ic_inact_auth = IEEE80211_INACT_AUTH;
103 ic->ic_inact_run = IEEE80211_INACT_RUN;
104 ic->ic_inact_probe = IEEE80211_INACT_PROBE;
106 /* NB: driver should override */
107 ic->ic_max_aid = IEEE80211_AID_DEF;
108 ic->ic_set_tim = ieee80211_set_tim;
112 ieee80211_node_lateattach(struct ieee80211com *ic)
114 struct ieee80211_rsnparms *rsn;
116 if (ic->ic_max_aid > IEEE80211_AID_MAX)
117 ic->ic_max_aid = IEEE80211_AID_MAX;
118 MALLOC(ic->ic_aid_bitmap, u_int32_t *,
119 howmany(ic->ic_max_aid, 32) * sizeof(u_int32_t),
120 M_DEVBUF, M_NOWAIT | M_ZERO);
121 if (ic->ic_aid_bitmap == NULL) {
122 /* XXX no way to recover */
123 printf("%s: no memory for AID bitmap!\n", __func__);
127 /* XXX defer until using hostap/ibss mode */
128 ic->ic_tim_len = howmany(ic->ic_max_aid, 8) * sizeof(u_int8_t);
129 MALLOC(ic->ic_tim_bitmap, u_int8_t *, ic->ic_tim_len,
130 M_DEVBUF, M_NOWAIT | M_ZERO);
131 if (ic->ic_tim_bitmap == NULL) {
132 /* XXX no way to recover */
133 printf("%s: no memory for TIM bitmap!\n", __func__);
136 ieee80211_node_table_init(ic, &ic->ic_sta, "station",
137 IEEE80211_INACT_INIT, ic->ic_crypto.cs_max_keyix,
138 ieee80211_timeout_stations);
139 ieee80211_node_table_init(ic, &ic->ic_scan, "scan",
140 IEEE80211_INACT_SCAN, 0,
141 ieee80211_timeout_scan_candidates);
143 ieee80211_reset_bss(ic);
145 * Setup "global settings" in the bss node so that
146 * each new station automatically inherits them.
148 rsn = &ic->ic_bss->ni_rsn;
149 /* WEP, TKIP, and AES-CCM are always supported */
150 rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_WEP;
151 rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_TKIP;
152 rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_AES_CCM;
153 if (ic->ic_caps & IEEE80211_C_AES)
154 rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_AES_OCB;
155 if (ic->ic_caps & IEEE80211_C_CKIP)
156 rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_CKIP;
158 * Default unicast cipher to WEP for 802.1x use. If
159 * WPA is enabled the management code will set these
162 rsn->rsn_ucastcipher = IEEE80211_CIPHER_WEP;
163 rsn->rsn_ucastkeylen = 104 / NBBY;
165 * WPA says the multicast cipher is the lowest unicast
166 * cipher supported. But we skip WEP which would
167 * otherwise be used based on this criteria.
169 rsn->rsn_mcastcipher = IEEE80211_CIPHER_TKIP;
170 rsn->rsn_mcastkeylen = 128 / NBBY;
173 * We support both WPA-PSK and 802.1x; the one used
174 * is determined by the authentication mode and the
175 * setting of the PSK state.
177 rsn->rsn_keymgmtset = WPA_ASE_8021X_UNSPEC | WPA_ASE_8021X_PSK;
178 rsn->rsn_keymgmt = WPA_ASE_8021X_PSK;
180 ic->ic_auth = ieee80211_authenticator_get(ic->ic_bss->ni_authmode);
184 ieee80211_node_detach(struct ieee80211com *ic)
187 if (ic->ic_bss != NULL) {
188 ieee80211_free_node(ic->ic_bss);
191 ieee80211_node_table_cleanup(&ic->ic_scan);
192 ieee80211_node_table_cleanup(&ic->ic_sta);
193 if (ic->ic_aid_bitmap != NULL) {
194 FREE(ic->ic_aid_bitmap, M_DEVBUF);
195 ic->ic_aid_bitmap = NULL;
197 if (ic->ic_tim_bitmap != NULL) {
198 FREE(ic->ic_tim_bitmap, M_DEVBUF);
199 ic->ic_tim_bitmap = NULL;
204 * Port authorize/unauthorize interfaces for use by an authenticator.
208 ieee80211_node_authorize(struct ieee80211_node *ni)
210 struct ieee80211com *ic = ni->ni_ic;
212 ni->ni_flags |= IEEE80211_NODE_AUTH;
213 ni->ni_inact_reload = ic->ic_inact_run;
217 ieee80211_node_unauthorize(struct ieee80211_node *ni)
219 ni->ni_flags &= ~IEEE80211_NODE_AUTH;
223 * Set/change the channel. The rate set is also updated as
224 * to insure a consistent view by drivers.
227 ieee80211_set_chan(struct ieee80211com *ic,
228 struct ieee80211_node *ni, struct ieee80211_channel *chan)
230 if (chan == IEEE80211_CHAN_ANYC) /* XXX while scanning */
231 chan = ic->ic_curchan;
233 ni->ni_rates = *ieee80211_get_suprates(ic, chan);
237 * AP scanning support.
240 #ifdef IEEE80211_DEBUG
242 dump_chanlist(const u_char chans[])
248 for (i = 0; i < IEEE80211_CHAN_MAX; i++)
249 if (isset(chans, i)) {
250 printf("%s%u", sep, i);
254 #endif /* IEEE80211_DEBUG */
257 * Initialize the channel set to scan based on the
258 * of available channels and the current PHY mode.
261 ieee80211_reset_scan(struct ieee80211com *ic)
264 /* XXX ic_des_chan should be handled with ic_chan_active */
265 if (ic->ic_des_chan != IEEE80211_CHAN_ANYC) {
266 memset(ic->ic_chan_scan, 0, sizeof(ic->ic_chan_scan));
267 setbit(ic->ic_chan_scan,
268 ieee80211_chan2ieee(ic, ic->ic_des_chan));
270 memcpy(ic->ic_chan_scan, ic->ic_chan_active,
271 sizeof(ic->ic_chan_active));
272 #ifdef IEEE80211_DEBUG
273 if (ieee80211_msg_scan(ic)) {
274 printf("%s: scan set:", __func__);
275 dump_chanlist(ic->ic_chan_scan);
276 printf(" start chan %u\n",
277 ieee80211_chan2ieee(ic, ic->ic_curchan));
279 #endif /* IEEE80211_DEBUG */
283 * Begin an active scan.
286 ieee80211_begin_scan(struct ieee80211com *ic, int reset)
289 ic->ic_scan.nt_scangen++;
291 * In all but hostap mode scanning starts off in
292 * an active mode before switching to passive.
294 if (ic->ic_opmode != IEEE80211_M_HOSTAP) {
295 ic->ic_flags |= IEEE80211_F_ASCAN;
296 ic->ic_stats.is_scan_active++;
298 ic->ic_stats.is_scan_passive++;
299 IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN,
300 "begin %s scan in %s mode, scangen %u\n",
301 (ic->ic_flags & IEEE80211_F_ASCAN) ? "active" : "passive",
302 ieee80211_phymode_name[ic->ic_curmode], ic->ic_scan.nt_scangen);
304 * Clear scan state and flush any previously seen AP's.
306 ieee80211_reset_scan(ic);
308 ieee80211_free_allnodes(&ic->ic_scan);
310 ic->ic_flags |= IEEE80211_F_SCAN;
312 /* Scan the next channel. */
313 ieee80211_next_scan(ic);
317 * Switch to the next channel marked for scanning.
320 ieee80211_next_scan(struct ieee80211com *ic)
322 struct ieee80211_channel *chan;
325 * Insure any previous mgt frame timeouts don't fire.
326 * This assumes the driver does the right thing in
327 * flushing anything queued in the driver and below.
329 ic->ic_mgt_timer = 0;
330 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN;
332 chan = ic->ic_curchan;
334 if (++chan > &ic->ic_channels[IEEE80211_CHAN_MAX])
335 chan = &ic->ic_channels[0];
336 if (isset(ic->ic_chan_scan, ieee80211_chan2ieee(ic, chan))) {
337 clrbit(ic->ic_chan_scan, ieee80211_chan2ieee(ic, chan));
338 IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN,
339 "%s: chan %d->%d\n", __func__,
340 ieee80211_chan2ieee(ic, ic->ic_curchan),
341 ieee80211_chan2ieee(ic, chan));
342 ic->ic_curchan = chan;
344 * XXX drivers should do this as needed,
345 * XXX for now maintain compatibility
347 ic->ic_bss->ni_rates = *ieee80211_get_suprates(ic, chan);
348 ieee80211_new_state(ic, IEEE80211_S_SCAN, -1);
351 } while (chan != ic->ic_curchan);
352 ieee80211_end_scan(ic);
357 * Probe the curent channel, if allowed, while scanning.
358 * If the channel is not marked passive-only then send
359 * a probe request immediately. Otherwise mark state and
360 * listen for beacons on the channel; if we receive something
361 * then we'll transmit a probe request.
364 ieee80211_probe_curchan(struct ieee80211com *ic, int force)
366 struct ifnet *ifp = ic->ic_ifp;
368 if ((ic->ic_curchan->ic_flags & IEEE80211_CHAN_PASSIVE) == 0 || force) {
370 * XXX send both broadcast+directed probe request
372 ieee80211_send_probereq(ic->ic_bss,
373 ic->ic_myaddr, ifp->if_broadcastaddr,
374 ifp->if_broadcastaddr,
375 ic->ic_des_essid, ic->ic_des_esslen,
376 ic->ic_opt_ie, ic->ic_opt_ie_len);
378 ic->ic_flags_ext |= IEEE80211_FEXT_PROBECHAN;
382 copy_bss(struct ieee80211_node *nbss, const struct ieee80211_node *obss)
384 /* propagate useful state */
385 nbss->ni_authmode = obss->ni_authmode;
386 nbss->ni_txpower = obss->ni_txpower;
387 nbss->ni_vlan = obss->ni_vlan;
388 nbss->ni_rsn = obss->ni_rsn;
389 /* XXX statistics? */
393 ieee80211_create_ibss(struct ieee80211com* ic, struct ieee80211_channel *chan)
395 struct ieee80211_node_table *nt;
396 struct ieee80211_node *ni;
398 IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN,
399 "%s: creating ibss\n", __func__);
402 * Create the station/neighbor table. Note that for adhoc
403 * mode we make the initial inactivity timer longer since
404 * we create nodes only through discovery and they typically
405 * are long-lived associations.
408 IEEE80211_NODE_LOCK(nt);
409 if (ic->ic_opmode == IEEE80211_M_HOSTAP) {
410 nt->nt_name = "station";
411 nt->nt_inact_init = ic->ic_inact_init;
413 nt->nt_name = "neighbor";
414 nt->nt_inact_init = ic->ic_inact_run;
416 IEEE80211_NODE_UNLOCK(nt);
418 ni = ieee80211_alloc_node(&ic->ic_sta, ic->ic_myaddr);
423 IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_myaddr);
424 ni->ni_esslen = ic->ic_des_esslen;
425 memcpy(ni->ni_essid, ic->ic_des_essid, ni->ni_esslen);
426 copy_bss(ni, ic->ic_bss);
427 ni->ni_intval = ic->ic_bintval;
428 if (ic->ic_flags & IEEE80211_F_PRIVACY)
429 ni->ni_capinfo |= IEEE80211_CAPINFO_PRIVACY;
430 if (ic->ic_phytype == IEEE80211_T_FH) {
431 ni->ni_fhdwell = 200; /* XXX */
434 if (ic->ic_opmode == IEEE80211_M_IBSS) {
435 ic->ic_flags |= IEEE80211_F_SIBSS;
436 ni->ni_capinfo |= IEEE80211_CAPINFO_IBSS; /* XXX */
437 if (ic->ic_flags & IEEE80211_F_DESBSSID)
438 IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_des_bssid);
440 get_random_bytes(ni->ni_bssid, IEEE80211_ADDR_LEN);
441 /* clear group bit, add local bit */
442 ni->ni_bssid[0] = (ni->ni_bssid[0] &~ 0x01) | 0x02;
444 } else if (ic->ic_opmode == IEEE80211_M_AHDEMO) {
445 if (ic->ic_flags & IEEE80211_F_DESBSSID)
446 IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_des_bssid);
448 memset(ni->ni_bssid, 0, IEEE80211_ADDR_LEN);
451 * Fix the channel and related attributes.
453 ieee80211_set_chan(ic, ni, chan);
454 ic->ic_curchan = chan;
455 ic->ic_curmode = ieee80211_chan2mode(ic, chan);
457 * Do mode-specific rate setup.
459 if (IEEE80211_IS_CHAN_FULL(chan) &&
460 (ic->ic_curmode == IEEE80211_MODE_11G ||
461 ic->ic_curmode == IEEE80211_MODE_11B))
462 ieee80211_set11gbasicrates(&ni->ni_rates, ic->ic_curmode);
464 (void) ieee80211_sta_join(ic, ieee80211_ref_node(ni));
468 ieee80211_reset_bss(struct ieee80211com *ic)
470 struct ieee80211_node *ni, *obss;
472 ieee80211_node_table_reset(&ic->ic_scan);
473 ieee80211_node_table_reset(&ic->ic_sta);
475 ni = ieee80211_alloc_node(&ic->ic_scan, ic->ic_myaddr);
476 KASSERT(ni != NULL, ("unable to setup inital BSS node"));
478 ic->ic_bss = ieee80211_ref_node(ni);
481 ni->ni_intval = ic->ic_bintval;
482 ieee80211_free_node(obss);
487 #define STA_FAILS_MAX 2 /* assoc failures before ignored */
490 ieee80211_match_bss(struct ieee80211com *ic, struct ieee80211_node *ni)
496 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan)))
498 if (ic->ic_des_chan != IEEE80211_CHAN_ANYC &&
499 ni->ni_chan != ic->ic_des_chan)
501 if (ic->ic_opmode == IEEE80211_M_IBSS) {
502 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0)
505 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0)
508 if (ic->ic_flags & IEEE80211_F_PRIVACY) {
509 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0)
512 /* XXX does this mean privacy is supported or required? */
513 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY)
516 rate = ieee80211_fix_rate(ni, &ni->ni_rates,
517 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE);
518 if (rate & IEEE80211_RATE_BASIC)
520 if (ic->ic_des_esslen != 0 &&
521 (ni->ni_esslen != ic->ic_des_esslen ||
522 memcmp(ni->ni_essid, ic->ic_des_essid, ic->ic_des_esslen) != 0))
524 if ((ic->ic_flags & IEEE80211_F_DESBSSID) &&
525 !IEEE80211_ADDR_EQ(ic->ic_des_bssid, ni->ni_bssid))
527 if (ni->ni_fails >= STA_FAILS_MAX)
529 #ifdef IEEE80211_DEBUG
530 if (ieee80211_msg_scan(ic)) {
532 fail & 0x40 ? '=' : fail & 0x80 ? '^' : fail ? '-' : '+',
533 ether_sprintf(ni->ni_macaddr));
534 printf(" %s%c", ether_sprintf(ni->ni_bssid),
535 fail & 0x20 ? '!' : ' ');
536 printf(" %3d%c", ieee80211_chan2ieee(ic, ni->ni_chan),
537 fail & 0x01 ? '!' : ' ');
538 printf(" %+4d", ni->ni_rssi);
539 printf(" %2dM%c", (rate & IEEE80211_RATE_VAL) / 2,
540 fail & 0x08 ? '!' : ' ');
542 (ni->ni_capinfo & IEEE80211_CAPINFO_ESS) ? "ess" :
543 (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) ? "ibss" :
545 fail & 0x02 ? '!' : ' ');
547 (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) ?
549 fail & 0x04 ? '!' : ' ');
550 ieee80211_print_essid(ni->ni_essid, ni->ni_esslen);
551 printf("%s\n", fail & 0x10 ? "!" : "");
557 static __inline u_int8_t
558 maxrate(const struct ieee80211_node *ni)
560 const struct ieee80211_rateset *rs = &ni->ni_rates;
561 /* NB: assumes rate set is sorted (happens on frame receive) */
562 return rs->rs_rates[rs->rs_nrates-1] & IEEE80211_RATE_VAL;
566 * Compare the capabilities of two nodes and decide which is
567 * more desirable (return >0 if a is considered better). Note
568 * that we assume compatibility/usability has already been checked
569 * so we don't need to (e.g. validate whether privacy is supported).
570 * Used to select the best scan candidate for association in a BSS.
573 ieee80211_node_compare(struct ieee80211com *ic,
574 const struct ieee80211_node *a,
575 const struct ieee80211_node *b)
578 u_int8_t rssia, rssib;
581 /* privacy support preferred */
582 if ((a->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) &&
583 (b->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0)
585 if ((a->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0 &&
586 (b->ni_capinfo & IEEE80211_CAPINFO_PRIVACY))
589 /* compare count of previous failures */
590 weight = b->ni_fails - a->ni_fails;
594 rssia = ic->ic_node_getrssi(a);
595 rssib = ic->ic_node_getrssi(b);
596 if (abs(rssib - rssia) < 5) {
597 /* best/max rate preferred if signal level close enough XXX */
602 /* XXX use freq for channel preference */
603 /* for now just prefer 5Ghz band to all other bands */
604 if (IEEE80211_IS_CHAN_5GHZ(a->ni_chan) &&
605 !IEEE80211_IS_CHAN_5GHZ(b->ni_chan))
607 if (!IEEE80211_IS_CHAN_5GHZ(a->ni_chan) &&
608 IEEE80211_IS_CHAN_5GHZ(b->ni_chan))
611 /* all things being equal, use signal level */
612 return rssia - rssib;
616 * Mark an ongoing scan stopped.
619 ieee80211_cancel_scan(struct ieee80211com *ic)
622 IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, "%s: end %s scan\n",
624 (ic->ic_flags & IEEE80211_F_ASCAN) ? "active" : "passive");
626 ic->ic_flags &= ~(IEEE80211_F_SCAN | IEEE80211_F_ASCAN);
627 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN;
631 * Complete a scan of potential channels.
634 ieee80211_end_scan(struct ieee80211com *ic)
636 struct ieee80211_node_table *nt = &ic->ic_scan;
637 struct ieee80211_node *ni, *selbs;
639 ieee80211_cancel_scan(ic);
640 ieee80211_notify_scan_done(ic);
642 if (ic->ic_opmode == IEEE80211_M_HOSTAP) {
643 u_int8_t maxrssi[IEEE80211_CHAN_MAX]; /* XXX off stack? */
648 * The passive scan to look for existing AP's completed,
649 * select a channel to camp on. Identify the channels
650 * that already have one or more AP's and try to locate
651 * an unoccupied one. If that fails, pick a channel that
652 * looks to be quietest.
654 memset(maxrssi, 0, sizeof(maxrssi));
655 IEEE80211_NODE_LOCK(nt);
656 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) {
657 rssi = ic->ic_node_getrssi(ni);
658 i = ieee80211_chan2ieee(ic, ni->ni_chan);
659 if (rssi > maxrssi[i])
662 IEEE80211_NODE_UNLOCK(nt);
663 /* XXX select channel more intelligently */
665 for (i = 0; i < IEEE80211_CHAN_MAX; i++)
666 if (isset(ic->ic_chan_active, i)) {
668 * If the channel is unoccupied the max rssi
669 * should be zero; just take it. Otherwise
670 * track the channel with the lowest rssi and
671 * use that when all channels appear occupied.
673 if (maxrssi[i] == 0) {
677 if (bestchan == -1 ||
678 maxrssi[i] < maxrssi[bestchan])
681 if (bestchan != -1) {
682 ieee80211_create_ibss(ic, &ic->ic_channels[bestchan]);
685 /* no suitable channel, should not happen */
689 * When manually sequencing the state machine; scan just once
690 * regardless of whether we have a candidate or not. The
691 * controlling application is expected to setup state and
692 * initiate an association.
694 if (ic->ic_roaming == IEEE80211_ROAMING_MANUAL)
697 * Automatic sequencing; look for a candidate and
698 * if found join the network.
700 /* NB: unlocked read should be ok */
701 if (TAILQ_FIRST(&nt->nt_node) == NULL) {
702 IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN,
703 "%s: no scan candidate\n", __func__);
705 if (ic->ic_opmode == IEEE80211_M_IBSS &&
706 (ic->ic_flags & IEEE80211_F_IBSSON) &&
707 ic->ic_des_esslen != 0) {
708 ieee80211_create_ibss(ic, ic->ic_ibss_chan);
712 * Decrement the failure counts so entries will be
713 * reconsidered the next time around. We really want
714 * to do this only for sta's where we've previously
717 IEEE80211_NODE_LOCK(nt);
718 TAILQ_FOREACH(ni, &nt->nt_node, ni_list)
721 IEEE80211_NODE_UNLOCK(nt);
723 * Reset the list of channels to scan and start again.
725 ieee80211_reset_scan(ic);
726 ic->ic_flags |= IEEE80211_F_SCAN;
727 ieee80211_next_scan(ic);
731 IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, "\t%s\n",
732 "macaddr bssid chan rssi rate flag wep essid");
733 IEEE80211_NODE_LOCK(nt);
734 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) {
735 if (ieee80211_match_bss(ic, ni) == 0) {
738 else if (ieee80211_node_compare(ic, ni, selbs) > 0)
742 if (selbs != NULL) /* NB: grab ref while dropping lock */
743 (void) ieee80211_ref_node(selbs);
744 IEEE80211_NODE_UNLOCK(nt);
747 if (!ieee80211_sta_join(ic, selbs)) {
748 ieee80211_free_node(selbs);
754 * Handle 802.11 ad hoc network merge. The
755 * convention, set by the Wireless Ethernet Compatibility Alliance
756 * (WECA), is that an 802.11 station will change its BSSID to match
757 * the "oldest" 802.11 ad hoc network, on the same channel, that
758 * has the station's desired SSID. The "oldest" 802.11 network
759 * sends beacons with the greatest TSF timestamp.
761 * The caller is assumed to validate TSF's before attempting a merge.
763 * Return !0 if the BSSID changed, 0 otherwise.
766 ieee80211_ibss_merge(struct ieee80211_node *ni)
768 struct ieee80211com *ic = ni->ni_ic;
770 if (ni == ic->ic_bss ||
771 IEEE80211_ADDR_EQ(ni->ni_bssid, ic->ic_bss->ni_bssid)) {
772 /* unchanged, nothing to do */
775 if (ieee80211_match_bss(ic, ni) != 0) { /* capabilities mismatch */
776 IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC,
777 "%s: merge failed, capabilities mismatch\n", __func__);
778 ic->ic_stats.is_ibss_capmismatch++;
781 IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC,
782 "%s: new bssid %s: %s preamble, %s slot time%s\n", __func__,
783 ether_sprintf(ni->ni_bssid),
784 ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long",
785 ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long",
786 ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : ""
788 return ieee80211_sta_join(ic, ieee80211_ref_node(ni));
792 * Join the specified IBSS/BSS network. The node is assumed to
793 * be passed in with a held reference.
796 ieee80211_sta_join(struct ieee80211com *ic, struct ieee80211_node *selbs)
798 struct ieee80211_node *obss;
800 if (ic->ic_opmode == IEEE80211_M_IBSS) {
801 struct ieee80211_node_table *nt;
803 * Fillin the neighbor table; it will already
804 * exist if we are simply switching mastership.
805 * XXX ic_sta always setup so this is unnecessary?
808 IEEE80211_NODE_LOCK(nt);
809 nt->nt_name = "neighbor";
810 nt->nt_inact_init = ic->ic_inact_run;
811 IEEE80211_NODE_UNLOCK(nt);
815 * Committed to selbs, setup state.
818 ic->ic_bss = selbs; /* NB: caller assumed to bump refcnt */
820 copy_bss(selbs, obss);
821 ieee80211_free_node(obss);
825 * Delete unusable rates; we've already checked
826 * that the negotiated rate set is acceptable.
828 ieee80211_fix_rate(ic->ic_bss, &ic->ic_bss->ni_rates,
829 IEEE80211_F_DODEL | IEEE80211_F_JOIN);
832 * Set the erp state (mostly the slot time) to deal with
833 * the auto-select case; this should be redundant if the
836 ic->ic_curmode = ieee80211_chan2mode(ic, selbs->ni_chan);
837 ic->ic_curchan = selbs->ni_chan;
838 ieee80211_reset_erp(ic);
839 ieee80211_wme_initparams(ic);
841 if (ic->ic_opmode == IEEE80211_M_STA)
842 ieee80211_new_state(ic, IEEE80211_S_AUTH, -1);
844 ieee80211_new_state(ic, IEEE80211_S_RUN, -1);
849 * Leave the specified IBSS/BSS network. The node is assumed to
850 * be passed in with a held reference.
853 ieee80211_sta_leave(struct ieee80211com *ic, struct ieee80211_node *ni)
855 ic->ic_node_cleanup(ni);
856 ieee80211_notify_node_leave(ic, ni);
859 static struct ieee80211_node *
860 node_alloc(struct ieee80211_node_table *nt)
862 struct ieee80211_node *ni;
864 MALLOC(ni, struct ieee80211_node *, sizeof(struct ieee80211_node),
865 M_80211_NODE, M_NOWAIT | M_ZERO);
870 * Reclaim any resources in a node and reset any critical
871 * state. Typically nodes are free'd immediately after,
872 * but in some cases the storage may be reused so we need
873 * to insure consistent state (should probably fix that).
876 node_cleanup(struct ieee80211_node *ni)
878 #define N(a) (sizeof(a)/sizeof(a[0]))
879 struct ieee80211com *ic = ni->ni_ic;
882 /* NB: preserve ni_table */
883 if (ni->ni_flags & IEEE80211_NODE_PWR_MGT) {
885 ni->ni_flags &= ~IEEE80211_NODE_PWR_MGT;
886 IEEE80211_DPRINTF(ic, IEEE80211_MSG_POWER,
887 "[%s] power save mode off, %u sta's in ps mode\n",
888 ether_sprintf(ni->ni_macaddr), ic->ic_ps_sta);
891 * Clear AREF flag that marks the authorization refcnt bump
892 * has happened. This is probably not needed as the node
893 * should always be removed from the table so not found but
894 * do it just in case.
896 ni->ni_flags &= ~IEEE80211_NODE_AREF;
899 * Drain power save queue and, if needed, clear TIM.
901 IEEE80211_NODE_SAVEQ_DRAIN(ni, qlen);
902 if (qlen != 0 && ic->ic_set_tim != NULL)
903 ic->ic_set_tim(ni, 0);
906 if (ni->ni_challenge != NULL) {
907 FREE(ni->ni_challenge, M_DEVBUF);
908 ni->ni_challenge = NULL;
911 * Preserve SSID, WPA, and WME ie's so the bss node is
912 * reusable during a re-auth/re-assoc state transition.
913 * If we remove these data they will not be recreated
914 * because they come from a probe-response or beacon frame
915 * which cannot be expected prior to the association-response.
916 * This should not be an issue when operating in other modes
917 * as stations leaving always go through a full state transition
918 * which will rebuild this state.
920 * XXX does this leave us open to inheriting old state?
922 for (i = 0; i < N(ni->ni_rxfrag); i++)
923 if (ni->ni_rxfrag[i] != NULL) {
924 m_freem(ni->ni_rxfrag[i]);
925 ni->ni_rxfrag[i] = NULL;
928 * Must be careful here to remove any key map entry w/o a LOR.
930 ieee80211_node_delucastkey(ni);
935 node_free(struct ieee80211_node *ni)
937 struct ieee80211com *ic = ni->ni_ic;
939 ic->ic_node_cleanup(ni);
940 if (ni->ni_wpa_ie != NULL)
941 FREE(ni->ni_wpa_ie, M_DEVBUF);
942 if (ni->ni_wme_ie != NULL)
943 FREE(ni->ni_wme_ie, M_DEVBUF);
944 IEEE80211_NODE_SAVEQ_DESTROY(ni);
945 FREE(ni, M_80211_NODE);
949 node_getrssi(const struct ieee80211_node *ni)
955 ieee80211_setup_node(struct ieee80211_node_table *nt,
956 struct ieee80211_node *ni, const u_int8_t *macaddr)
958 struct ieee80211com *ic = nt->nt_ic;
961 IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE,
962 "%s %p<%s> in %s table\n", __func__, ni,
963 ether_sprintf(macaddr), nt->nt_name);
965 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr);
966 hash = IEEE80211_NODE_HASH(macaddr);
967 ieee80211_node_initref(ni); /* mark referenced */
968 ni->ni_chan = IEEE80211_CHAN_ANYC;
969 ni->ni_authmode = IEEE80211_AUTH_OPEN;
970 ni->ni_txpower = ic->ic_txpowlimit; /* max power */
971 ieee80211_crypto_resetkey(ic, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE);
972 ni->ni_inact_reload = nt->nt_inact_init;
973 ni->ni_inact = ni->ni_inact_reload;
974 IEEE80211_NODE_SAVEQ_INIT(ni, "unknown");
976 IEEE80211_NODE_LOCK(nt);
977 TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list);
978 LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash);
981 IEEE80211_NODE_UNLOCK(nt);
984 struct ieee80211_node *
985 ieee80211_alloc_node(struct ieee80211_node_table *nt, const u_int8_t *macaddr)
987 struct ieee80211com *ic = nt->nt_ic;
988 struct ieee80211_node *ni;
990 ni = ic->ic_node_alloc(nt);
992 ieee80211_setup_node(nt, ni, macaddr);
994 ic->ic_stats.is_rx_nodealloc++;
999 * Craft a temporary node suitable for sending a management frame
1000 * to the specified station. We craft only as much state as we
1001 * need to do the work since the node will be immediately reclaimed
1002 * once the send completes.
1004 struct ieee80211_node *
1005 ieee80211_tmp_node(struct ieee80211com *ic, const u_int8_t *macaddr)
1007 struct ieee80211_node *ni;
1009 ni = ic->ic_node_alloc(&ic->ic_sta);
1011 IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE,
1012 "%s %p<%s>\n", __func__, ni, ether_sprintf(macaddr));
1014 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr);
1015 IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_bss->ni_bssid);
1016 ieee80211_node_initref(ni); /* mark referenced */
1017 ni->ni_txpower = ic->ic_bss->ni_txpower;
1018 /* NB: required by ieee80211_fix_rate */
1019 ieee80211_set_chan(ic, ni, ic->ic_bss->ni_chan);
1020 ieee80211_crypto_resetkey(ic, &ni->ni_ucastkey,
1021 IEEE80211_KEYIX_NONE);
1022 /* XXX optimize away */
1023 IEEE80211_NODE_SAVEQ_INIT(ni, "unknown");
1025 ni->ni_table = NULL; /* NB: pedantic */
1029 ic->ic_stats.is_rx_nodealloc++;
1034 struct ieee80211_node *
1035 ieee80211_dup_bss(struct ieee80211_node_table *nt, const u_int8_t *macaddr)
1037 struct ieee80211com *ic = nt->nt_ic;
1038 struct ieee80211_node *ni;
1040 ni = ic->ic_node_alloc(nt);
1042 ieee80211_setup_node(nt, ni, macaddr);
1044 * Inherit from ic_bss.
1046 ni->ni_authmode = ic->ic_bss->ni_authmode;
1047 ni->ni_txpower = ic->ic_bss->ni_txpower;
1048 ni->ni_vlan = ic->ic_bss->ni_vlan; /* XXX?? */
1049 IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_bss->ni_bssid);
1050 ieee80211_set_chan(ic, ni, ic->ic_bss->ni_chan);
1051 ni->ni_rsn = ic->ic_bss->ni_rsn;
1053 ic->ic_stats.is_rx_nodealloc++;
1057 static struct ieee80211_node *
1058 #ifdef IEEE80211_DEBUG_REFCNT
1059 _ieee80211_find_node_debug(struct ieee80211_node_table *nt,
1060 const u_int8_t *macaddr, const char *func, int line)
1062 _ieee80211_find_node(struct ieee80211_node_table *nt,
1063 const u_int8_t *macaddr)
1066 struct ieee80211_node *ni;
1069 IEEE80211_NODE_LOCK_ASSERT(nt);
1071 hash = IEEE80211_NODE_HASH(macaddr);
1072 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) {
1073 if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) {
1074 ieee80211_ref_node(ni); /* mark referenced */
1075 #ifdef IEEE80211_DEBUG_REFCNT
1076 IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE,
1077 "%s (%s:%u) %p<%s> refcnt %d\n", __func__,
1079 ni, ether_sprintf(ni->ni_macaddr),
1080 ieee80211_node_refcnt(ni));
1087 #ifdef IEEE80211_DEBUG_REFCNT
1088 #define _ieee80211_find_node(nt, mac) \
1089 _ieee80211_find_node_debug(nt, mac, func, line)
1092 struct ieee80211_node *
1093 #ifdef IEEE80211_DEBUG_REFCNT
1094 ieee80211_find_node_debug(struct ieee80211_node_table *nt,
1095 const u_int8_t *macaddr, const char *func, int line)
1097 ieee80211_find_node(struct ieee80211_node_table *nt, const u_int8_t *macaddr)
1100 struct ieee80211_node *ni;
1102 IEEE80211_NODE_LOCK(nt);
1103 ni = _ieee80211_find_node(nt, macaddr);
1104 IEEE80211_NODE_UNLOCK(nt);
1109 * Fake up a node; this handles node discovery in adhoc mode.
1110 * Note that for the driver's benefit we we treat this like
1111 * an association so the driver has an opportunity to setup
1112 * it's private state.
1114 struct ieee80211_node *
1115 ieee80211_fakeup_adhoc_node(struct ieee80211_node_table *nt,
1116 const u_int8_t macaddr[IEEE80211_ADDR_LEN])
1118 struct ieee80211com *ic = nt->nt_ic;
1119 struct ieee80211_node *ni;
1121 IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE,
1122 "%s: mac<%s>\n", __func__, ether_sprintf(macaddr));
1123 ni = ieee80211_dup_bss(nt, macaddr);
1125 /* XXX no rate negotiation; just dup */
1126 ni->ni_rates = ic->ic_bss->ni_rates;
1127 if (ic->ic_newassoc != NULL)
1128 ic->ic_newassoc(ni, 1);
1129 /* XXX not right for 802.1x/WPA */
1130 ieee80211_node_authorize(ni);
1131 if (ic->ic_opmode == IEEE80211_M_AHDEMO) {
1133 * Blindly propagate capabilities based on the
1134 * local configuration. In particular this permits
1135 * us to use QoS to disable ACK's.
1137 if (ic->ic_flags & IEEE80211_F_WME)
1138 ni->ni_flags |= IEEE80211_NODE_QOS;
1144 #ifdef IEEE80211_DEBUG
1146 dump_probe_beacon(u_int8_t subtype, int isnew,
1147 const u_int8_t mac[IEEE80211_ADDR_LEN],
1148 const struct ieee80211_scanparams *sp)
1151 printf("[%s] %s%s on chan %u (bss chan %u) ",
1152 ether_sprintf(mac), isnew ? "new " : "",
1153 ieee80211_mgt_subtype_name[subtype >> IEEE80211_FC0_SUBTYPE_SHIFT],
1154 sp->chan, sp->bchan);
1155 ieee80211_print_essid(sp->ssid + 2, sp->ssid[1]);
1159 printf("[%s] caps 0x%x bintval %u erp 0x%x",
1160 ether_sprintf(mac), sp->capinfo, sp->bintval, sp->erp);
1161 if (sp->country != NULL) {
1163 printf(" country info %*D",
1164 sp->country[1], sp->country+2, " ");
1167 printf(" country info");
1168 for (i = 0; i < sp->country[1]; i++)
1169 printf(" %02x", sp->country[i+2]);
1175 #endif /* IEEE80211_DEBUG */
1178 saveie(u_int8_t **iep, const u_int8_t *ie)
1184 ieee80211_saveie(iep, ie);
1188 * Process a beacon or probe response frame.
1191 ieee80211_add_scan(struct ieee80211com *ic,
1192 const struct ieee80211_scanparams *sp,
1193 const struct ieee80211_frame *wh,
1194 int subtype, int rssi, int rstamp)
1196 #define ISPROBE(_st) ((_st) == IEEE80211_FC0_SUBTYPE_PROBE_RESP)
1197 struct ieee80211_node_table *nt = &ic->ic_scan;
1198 struct ieee80211_node *ni;
1201 ni = ieee80211_find_node(nt, wh->i_addr2);
1204 * Create a new entry.
1206 ni = ic->ic_node_alloc(nt);
1208 ic->ic_stats.is_rx_nodealloc++;
1211 ieee80211_setup_node(nt, ni, wh->i_addr2);
1213 * XXX inherit from ic_bss.
1215 ni->ni_authmode = ic->ic_bss->ni_authmode;
1216 ni->ni_txpower = ic->ic_bss->ni_txpower;
1217 ni->ni_vlan = ic->ic_bss->ni_vlan; /* XXX?? */
1218 ieee80211_set_chan(ic, ni, ic->ic_curchan);
1219 ni->ni_rsn = ic->ic_bss->ni_rsn;
1222 #ifdef IEEE80211_DEBUG
1223 if (ieee80211_msg_scan(ic) && (ic->ic_flags & IEEE80211_F_SCAN))
1224 dump_probe_beacon(subtype, newnode, wh->i_addr2, sp);
1226 /* XXX ap beaconing multiple ssid w/ same bssid */
1227 if (sp->ssid[1] != 0 &&
1228 (ISPROBE(subtype) || ni->ni_esslen == 0)) {
1229 ni->ni_esslen = sp->ssid[1];
1230 memset(ni->ni_essid, 0, sizeof(ni->ni_essid));
1231 memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]);
1233 ni->ni_scangen = ic->ic_scan.nt_scangen;
1234 IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3);
1236 ni->ni_rstamp = rstamp;
1237 memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp));
1238 ni->ni_intval = sp->bintval;
1239 ni->ni_capinfo = sp->capinfo;
1240 ni->ni_chan = &ic->ic_channels[sp->chan];
1241 ni->ni_fhdwell = sp->fhdwell;
1242 ni->ni_fhindex = sp->fhindex;
1243 ni->ni_erp = sp->erp;
1244 if (sp->tim != NULL) {
1245 struct ieee80211_tim_ie *ie =
1246 (struct ieee80211_tim_ie *) sp->tim;
1248 ni->ni_dtim_count = ie->tim_count;
1249 ni->ni_dtim_period = ie->tim_period;
1252 * Record the byte offset from the mac header to
1253 * the start of the TIM information element for
1254 * use by hardware and/or to speedup software
1255 * processing of beacon frames.
1257 ni->ni_timoff = sp->timoff;
1259 * Record optional information elements that might be
1260 * used by applications or drivers.
1262 saveie(&ni->ni_wme_ie, sp->wme);
1263 saveie(&ni->ni_wpa_ie, sp->wpa);
1265 /* NB: must be after ni_chan is setup */
1266 ieee80211_setup_rates(ni, sp->rates, sp->xrates, IEEE80211_F_DOSORT);
1269 ieee80211_free_node(ni);
1274 ieee80211_init_neighbor(struct ieee80211_node *ni,
1275 const struct ieee80211_frame *wh,
1276 const struct ieee80211_scanparams *sp)
1279 IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE,
1280 "%s: %p<%s>\n", __func__, ni, ether_sprintf(ni->ni_macaddr));
1281 ni->ni_esslen = sp->ssid[1];
1282 memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]);
1283 IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3);
1284 memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp));
1285 ni->ni_intval = sp->bintval;
1286 ni->ni_capinfo = sp->capinfo;
1287 ni->ni_chan = ni->ni_ic->ic_curchan;
1288 ni->ni_fhdwell = sp->fhdwell;
1289 ni->ni_fhindex = sp->fhindex;
1290 ni->ni_erp = sp->erp;
1291 ni->ni_timoff = sp->timoff;
1292 if (sp->wme != NULL)
1293 ieee80211_saveie(&ni->ni_wme_ie, sp->wme);
1294 if (sp->wpa != NULL)
1295 ieee80211_saveie(&ni->ni_wpa_ie, sp->wpa);
1297 /* NB: must be after ni_chan is setup */
1298 ieee80211_setup_rates(ni, sp->rates, sp->xrates,
1299 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE |
1300 IEEE80211_F_DONEGO | IEEE80211_F_DODEL);
1304 * Do node discovery in adhoc mode on receipt of a beacon
1305 * or probe response frame. Note that for the driver's
1306 * benefit we we treat this like an association so the
1307 * driver has an opportunity to setup it's private state.
1309 struct ieee80211_node *
1310 ieee80211_add_neighbor(struct ieee80211com *ic,
1311 const struct ieee80211_frame *wh,
1312 const struct ieee80211_scanparams *sp)
1314 struct ieee80211_node *ni;
1316 IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE,
1317 "%s: mac<%s>\n", __func__, ether_sprintf(wh->i_addr2));
1318 ni = ieee80211_dup_bss(&ic->ic_sta, wh->i_addr2);/* XXX alloc_node? */
1320 ieee80211_init_neighbor(ni, wh, sp);
1321 if (ic->ic_newassoc != NULL)
1322 ic->ic_newassoc(ni, 1);
1323 /* XXX not right for 802.1x/WPA */
1324 ieee80211_node_authorize(ni);
1329 #define IS_CTL(wh) \
1330 ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) == IEEE80211_FC0_TYPE_CTL)
1331 #define IS_PSPOLL(wh) \
1332 ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == IEEE80211_FC0_SUBTYPE_PS_POLL)
1334 * Locate the node for sender, track state, and then pass the
1335 * (referenced) node up to the 802.11 layer for its use. We
1336 * are required to pass some node so we fall back to ic_bss
1337 * when this frame is from an unknown sender. The 802.11 layer
1338 * knows this means the sender wasn't in the node table and
1341 struct ieee80211_node *
1342 #ifdef IEEE80211_DEBUG_REFCNT
1343 ieee80211_find_rxnode_debug(struct ieee80211com *ic,
1344 const struct ieee80211_frame_min *wh, const char *func, int line)
1346 ieee80211_find_rxnode(struct ieee80211com *ic,
1347 const struct ieee80211_frame_min *wh)
1350 struct ieee80211_node_table *nt;
1351 struct ieee80211_node *ni;
1353 /* XXX may want scanned nodes in the neighbor table for adhoc */
1354 if (ic->ic_opmode == IEEE80211_M_STA ||
1355 ic->ic_opmode == IEEE80211_M_MONITOR ||
1356 (ic->ic_flags & IEEE80211_F_SCAN))
1360 /* XXX check ic_bss first in station mode */
1361 /* XXX 4-address frames? */
1362 IEEE80211_NODE_LOCK(nt);
1363 if (IS_CTL(wh) && !IS_PSPOLL(wh) /*&& !IS_RTS(ah)*/)
1364 ni = _ieee80211_find_node(nt, wh->i_addr1);
1366 ni = _ieee80211_find_node(nt, wh->i_addr2);
1368 ni = ieee80211_ref_node(ic->ic_bss);
1369 IEEE80211_NODE_UNLOCK(nt);
1375 * Like ieee80211_find_rxnode but use the supplied h/w
1376 * key index as a hint to locate the node in the key
1377 * mapping table. If an entry is present at the key
1378 * index we return it; otherwise do a normal lookup and
1379 * update the mapping table if the station has a unicast
1380 * key assigned to it.
1382 struct ieee80211_node *
1383 #ifdef IEEE80211_DEBUG_REFCNT
1384 ieee80211_find_rxnode_withkey_debug(struct ieee80211com *ic,
1385 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix,
1386 const char *func, int line)
1388 ieee80211_find_rxnode_withkey(struct ieee80211com *ic,
1389 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix)
1392 struct ieee80211_node_table *nt;
1393 struct ieee80211_node *ni;
1395 if (ic->ic_opmode == IEEE80211_M_STA ||
1396 ic->ic_opmode == IEEE80211_M_MONITOR ||
1397 (ic->ic_flags & IEEE80211_F_SCAN))
1401 IEEE80211_NODE_LOCK(nt);
1402 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax)
1403 ni = nt->nt_keyixmap[keyix];
1407 if (IS_CTL(wh) && !IS_PSPOLL(wh) /*&& !IS_RTS(ah)*/)
1408 ni = _ieee80211_find_node(nt, wh->i_addr1);
1410 ni = _ieee80211_find_node(nt, wh->i_addr2);
1412 ni = ieee80211_ref_node(ic->ic_bss);
1413 if (nt->nt_keyixmap != NULL) {
1415 * If the station has a unicast key cache slot
1416 * assigned update the key->node mapping table.
1418 keyix = ni->ni_ucastkey.wk_rxkeyix;
1419 /* XXX can keyixmap[keyix] != NULL? */
1420 if (keyix < nt->nt_keyixmax &&
1421 nt->nt_keyixmap[keyix] == NULL) {
1422 IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE,
1423 "%s: add key map entry %p<%s> refcnt %d\n",
1424 __func__, ni, ether_sprintf(ni->ni_macaddr),
1425 ieee80211_node_refcnt(ni)+1);
1426 nt->nt_keyixmap[keyix] = ieee80211_ref_node(ni);
1430 ieee80211_ref_node(ni);
1432 IEEE80211_NODE_UNLOCK(nt);
1440 * Return a reference to the appropriate node for sending
1441 * a data frame. This handles node discovery in adhoc networks.
1443 struct ieee80211_node *
1444 #ifdef IEEE80211_DEBUG_REFCNT
1445 ieee80211_find_txnode_debug(struct ieee80211com *ic, const u_int8_t *macaddr,
1446 const char *func, int line)
1448 ieee80211_find_txnode(struct ieee80211com *ic, const u_int8_t *macaddr)
1451 struct ieee80211_node_table *nt = &ic->ic_sta;
1452 struct ieee80211_node *ni;
1455 * The destination address should be in the node table
1456 * unless this is a multicast/broadcast frame. We can
1457 * also optimize station mode operation, all frames go
1460 /* XXX can't hold lock across dup_bss 'cuz of recursive locking */
1461 IEEE80211_NODE_LOCK(nt);
1462 if (ic->ic_opmode == IEEE80211_M_STA || IEEE80211_IS_MULTICAST(macaddr))
1463 ni = ieee80211_ref_node(ic->ic_bss);
1465 ni = _ieee80211_find_node(nt, macaddr);
1466 if (ic->ic_opmode == IEEE80211_M_HOSTAP &&
1467 (ni != NULL && ni->ni_associd == 0)) {
1469 * Station is not associated; don't permit the
1470 * data frame to be sent by returning NULL. This
1471 * is kinda a kludge but the least intrusive way
1472 * to add this check into all drivers.
1474 ieee80211_unref_node(&ni); /* NB: null's ni */
1477 IEEE80211_NODE_UNLOCK(nt);
1480 if (ic->ic_opmode == IEEE80211_M_IBSS ||
1481 ic->ic_opmode == IEEE80211_M_AHDEMO) {
1483 * In adhoc mode cons up a node for the destination.
1484 * Note that we need an additional reference for the
1485 * caller to be consistent with _ieee80211_find_node.
1487 ni = ieee80211_fakeup_adhoc_node(nt, macaddr);
1489 (void) ieee80211_ref_node(ni);
1491 IEEE80211_DPRINTF(ic, IEEE80211_MSG_OUTPUT,
1492 "[%s] no node, discard frame (%s)\n",
1493 ether_sprintf(macaddr), __func__);
1494 ic->ic_stats.is_tx_nonode++;
1501 * Like find but search based on the channel too.
1503 struct ieee80211_node *
1504 #ifdef IEEE80211_DEBUG_REFCNT
1505 ieee80211_find_node_with_channel_debug(struct ieee80211_node_table *nt,
1506 const u_int8_t *macaddr, struct ieee80211_channel *chan,
1507 const char *func, int line)
1509 ieee80211_find_node_with_channel(struct ieee80211_node_table *nt,
1510 const u_int8_t *macaddr, struct ieee80211_channel *chan)
1513 struct ieee80211_node *ni;
1516 hash = IEEE80211_NODE_HASH(macaddr);
1517 IEEE80211_NODE_LOCK(nt);
1518 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) {
1519 if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr) &&
1520 ni->ni_chan == chan) {
1521 ieee80211_ref_node(ni); /* mark referenced */
1522 IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE,
1523 REFCNT_LOC, ni, ether_sprintf(ni->ni_macaddr),
1524 ieee80211_node_refcnt(ni));
1528 IEEE80211_NODE_UNLOCK(nt);
1533 * Like find but search based on the ssid too.
1535 struct ieee80211_node *
1536 #ifdef IEEE80211_DEBUG_REFCNT
1537 ieee80211_find_node_with_ssid_debug(struct ieee80211_node_table *nt,
1538 const u_int8_t *macaddr, u_int ssidlen, const u_int8_t *ssid,
1539 const char *func, int line)
1541 ieee80211_find_node_with_ssid(struct ieee80211_node_table *nt,
1542 const u_int8_t *macaddr, u_int ssidlen, const u_int8_t *ssid)
1545 #define MATCH_SSID(ni, ssid, ssidlen) \
1546 (ni->ni_esslen == ssidlen && memcmp(ni->ni_essid, ssid, ssidlen) == 0)
1547 static const u_int8_t zeromac[IEEE80211_ADDR_LEN];
1548 struct ieee80211com *ic = nt->nt_ic;
1549 struct ieee80211_node *ni;
1552 IEEE80211_NODE_LOCK(nt);
1554 * A mac address that is all zero means match only the ssid;
1555 * otherwise we must match both.
1557 if (IEEE80211_ADDR_EQ(macaddr, zeromac)) {
1558 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) {
1559 if (MATCH_SSID(ni, ssid, ssidlen))
1563 hash = IEEE80211_NODE_HASH(macaddr);
1564 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) {
1565 if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr) &&
1566 MATCH_SSID(ni, ssid, ssidlen))
1571 ieee80211_ref_node(ni); /* mark referenced */
1572 IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE,
1573 REFCNT_LOC, ni, ether_sprintf(ni->ni_macaddr),
1574 ieee80211_node_refcnt(ni));
1576 IEEE80211_NODE_UNLOCK(nt);
1582 _ieee80211_free_node(struct ieee80211_node *ni)
1584 struct ieee80211com *ic = ni->ni_ic;
1585 struct ieee80211_node_table *nt = ni->ni_table;
1587 IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE,
1588 "%s %p<%s> in %s table\n", __func__, ni,
1589 ether_sprintf(ni->ni_macaddr),
1590 nt != NULL ? nt->nt_name : "<gone>");
1592 IEEE80211_AID_CLR(ni->ni_associd, ic->ic_aid_bitmap);
1594 TAILQ_REMOVE(&nt->nt_node, ni, ni_list);
1595 LIST_REMOVE(ni, ni_hash);
1597 ic->ic_node_free(ni);
1601 #ifdef IEEE80211_DEBUG_REFCNT
1602 ieee80211_free_node_debug(struct ieee80211_node *ni, const char *func, int line)
1604 ieee80211_free_node(struct ieee80211_node *ni)
1607 struct ieee80211_node_table *nt = ni->ni_table;
1609 #ifdef IEEE80211_DEBUG_REFCNT
1610 IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE,
1611 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni,
1612 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1);
1615 IEEE80211_NODE_LOCK(nt);
1616 if (ieee80211_node_dectestref(ni)) {
1618 * Last reference, reclaim state.
1620 _ieee80211_free_node(ni);
1621 } else if (ieee80211_node_refcnt(ni) == 1 &&
1622 nt->nt_keyixmap != NULL) {
1623 ieee80211_keyix keyix;
1625 * Check for a last reference in the key mapping table.
1627 keyix = ni->ni_ucastkey.wk_rxkeyix;
1628 if (keyix < nt->nt_keyixmax &&
1629 nt->nt_keyixmap[keyix] == ni) {
1630 IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE,
1631 "%s: %p<%s> clear key map entry", __func__,
1632 ni, ether_sprintf(ni->ni_macaddr));
1633 nt->nt_keyixmap[keyix] = NULL;
1634 ieee80211_node_decref(ni); /* XXX needed? */
1635 _ieee80211_free_node(ni);
1638 IEEE80211_NODE_UNLOCK(nt);
1640 if (ieee80211_node_dectestref(ni))
1641 _ieee80211_free_node(ni);
1646 * Reclaim a unicast key and clear any key cache state.
1649 ieee80211_node_delucastkey(struct ieee80211_node *ni)
1651 struct ieee80211com *ic = ni->ni_ic;
1652 struct ieee80211_node_table *nt = &ic->ic_sta;
1653 struct ieee80211_node *nikey;
1654 ieee80211_keyix keyix;
1655 int isowned, status;
1658 * NB: We must beware of LOR here; deleting the key
1659 * can cause the crypto layer to block traffic updates
1660 * which can generate a LOR against the node table lock;
1661 * grab it here and stash the key index for our use below.
1663 * Must also beware of recursion on the node table lock.
1664 * When called from node_cleanup we may already have
1665 * the node table lock held. Unfortunately there's no
1666 * way to separate out this path so we must do this
1669 isowned = IEEE80211_NODE_IS_LOCKED(nt);
1671 IEEE80211_NODE_LOCK(nt);
1672 keyix = ni->ni_ucastkey.wk_rxkeyix;
1673 status = ieee80211_crypto_delkey(ic, &ni->ni_ucastkey);
1674 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) {
1675 nikey = nt->nt_keyixmap[keyix];
1676 nt->nt_keyixmap[keyix] = NULL;;
1680 IEEE80211_NODE_UNLOCK(&ic->ic_sta);
1682 if (nikey != NULL) {
1683 KASSERT(nikey == ni,
1684 ("key map out of sync, ni %p nikey %p", ni, nikey));
1685 IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE,
1686 "%s: delete key map entry %p<%s> refcnt %d\n",
1687 __func__, ni, ether_sprintf(ni->ni_macaddr),
1688 ieee80211_node_refcnt(ni)-1);
1689 ieee80211_free_node(ni);
1695 * Reclaim a node. If this is the last reference count then
1696 * do the normal free work. Otherwise remove it from the node
1697 * table and mark it gone by clearing the back-reference.
1700 node_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni)
1702 ieee80211_keyix keyix;
1704 IEEE80211_NODE_LOCK_ASSERT(nt);
1706 IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE,
1707 "%s: remove %p<%s> from %s table, refcnt %d\n",
1708 __func__, ni, ether_sprintf(ni->ni_macaddr),
1709 nt->nt_name, ieee80211_node_refcnt(ni)-1);
1711 * Clear any entry in the unicast key mapping table.
1712 * We need to do it here so rx lookups don't find it
1713 * in the mapping table even if it's not in the hash
1714 * table. We cannot depend on the mapping table entry
1715 * being cleared because the node may not be free'd.
1717 keyix = ni->ni_ucastkey.wk_rxkeyix;
1718 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax &&
1719 nt->nt_keyixmap[keyix] == ni) {
1720 IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE,
1721 "%s: %p<%s> clear key map entry\n",
1722 __func__, ni, ether_sprintf(ni->ni_macaddr));
1723 nt->nt_keyixmap[keyix] = NULL;
1724 ieee80211_node_decref(ni); /* NB: don't need free */
1726 if (!ieee80211_node_dectestref(ni)) {
1728 * Other references are present, just remove the
1729 * node from the table so it cannot be found. When
1730 * the references are dropped storage will be
1733 TAILQ_REMOVE(&nt->nt_node, ni, ni_list);
1734 LIST_REMOVE(ni, ni_hash);
1735 ni->ni_table = NULL; /* clear reference */
1737 _ieee80211_free_node(ni);
1741 ieee80211_free_allnodes_locked(struct ieee80211_node_table *nt)
1743 struct ieee80211com *ic = nt->nt_ic;
1744 struct ieee80211_node *ni;
1746 IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE,
1747 "%s: free all nodes in %s table\n", __func__, nt->nt_name);
1749 while ((ni = TAILQ_FIRST(&nt->nt_node)) != NULL) {
1750 if (ni->ni_associd != 0) {
1751 if (ic->ic_auth->ia_node_leave != NULL)
1752 ic->ic_auth->ia_node_leave(ic, ni);
1753 IEEE80211_AID_CLR(ni->ni_associd, ic->ic_aid_bitmap);
1755 node_reclaim(nt, ni);
1757 ieee80211_reset_erp(ic);
1761 ieee80211_free_allnodes(struct ieee80211_node_table *nt)
1764 IEEE80211_NODE_LOCK(nt);
1765 ieee80211_free_allnodes_locked(nt);
1766 IEEE80211_NODE_UNLOCK(nt);
1770 * Timeout entries in the scan cache.
1773 ieee80211_timeout_scan_candidates(struct ieee80211_node_table *nt)
1775 struct ieee80211com *ic = nt->nt_ic;
1776 struct ieee80211_node *ni, *tni;
1778 IEEE80211_NODE_LOCK(nt);
1780 /* XXX belongs elsewhere */
1781 if (ni->ni_rxfrag[0] != NULL && ticks > ni->ni_rxfragstamp + hz) {
1782 m_freem(ni->ni_rxfrag[0]);
1783 ni->ni_rxfrag[0] = NULL;
1785 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, tni) {
1786 if (ni->ni_inact && --ni->ni_inact == 0) {
1787 IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE,
1788 "[%s] scan candidate purged from cache "
1789 "(refcnt %u)\n", ether_sprintf(ni->ni_macaddr),
1790 ieee80211_node_refcnt(ni));
1791 node_reclaim(nt, ni);
1794 IEEE80211_NODE_UNLOCK(nt);
1796 nt->nt_inact_timer = IEEE80211_INACT_WAIT;
1800 * Timeout inactive stations and do related housekeeping.
1801 * Note that we cannot hold the node lock while sending a
1802 * frame as this would lead to a LOR. Instead we use a
1803 * generation number to mark nodes that we've scanned and
1804 * drop the lock and restart a scan if we have to time out
1805 * a node. Since we are single-threaded by virtue of
1806 * controlling the inactivity timer we can be sure this will
1807 * process each node only once.
1810 ieee80211_timeout_stations(struct ieee80211_node_table *nt)
1812 struct ieee80211com *ic = nt->nt_ic;
1813 struct ieee80211_node *ni;
1817 isadhoc = (ic->ic_opmode == IEEE80211_M_IBSS ||
1818 ic->ic_opmode == IEEE80211_M_AHDEMO);
1819 IEEE80211_SCAN_LOCK(nt);
1820 gen = ++nt->nt_scangen;
1821 IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE,
1822 "%s: %s scangen %u\n", __func__, nt->nt_name, gen);
1824 IEEE80211_NODE_LOCK(nt);
1825 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) {
1826 if (ni->ni_scangen == gen) /* previously handled */
1828 ni->ni_scangen = gen;
1830 * Ignore entries for which have yet to receive an
1831 * authentication frame. These are transient and
1832 * will be reclaimed when the last reference to them
1833 * goes away (when frame xmits complete).
1835 if (ic->ic_opmode == IEEE80211_M_HOSTAP &&
1836 (ni->ni_flags & IEEE80211_NODE_AREF) == 0)
1839 * Free fragment if not needed anymore
1840 * (last fragment older than 1s).
1841 * XXX doesn't belong here
1843 if (ni->ni_rxfrag[0] != NULL &&
1844 ticks > ni->ni_rxfragstamp + hz) {
1845 m_freem(ni->ni_rxfrag[0]);
1846 ni->ni_rxfrag[0] = NULL;
1849 * Special case ourself; we may be idle for extended periods
1850 * of time and regardless reclaiming our state is wrong.
1852 if (ni == ic->ic_bss)
1855 if (ni->ni_associd != 0 || isadhoc) {
1857 * Age frames on the power save queue. The
1858 * aging interval is 4 times the listen
1859 * interval specified by the station. This
1860 * number is factored into the age calculations
1861 * when the frame is placed on the queue. We
1862 * store ages as time differences we can check
1863 * and/or adjust only the head of the list.
1865 if (IEEE80211_NODE_SAVEQ_QLEN(ni) != 0) {
1869 IEEE80211_NODE_SAVEQ_LOCK(ni);
1870 while (IF_POLL(&ni->ni_savedq, m) != NULL &&
1871 M_AGE_GET(m) < IEEE80211_INACT_WAIT) {
1872 IEEE80211_DPRINTF(ic, IEEE80211_MSG_POWER, "[%s] discard frame, age %u\n", ether_sprintf(ni->ni_macaddr), M_AGE_GET(m));/*XXX*/
1873 _IEEE80211_NODE_SAVEQ_DEQUEUE_HEAD(ni, m);
1878 M_AGE_SUB(m, IEEE80211_INACT_WAIT);
1879 IEEE80211_NODE_SAVEQ_UNLOCK(ni);
1882 IEEE80211_DPRINTF(ic,
1883 IEEE80211_MSG_POWER,
1884 "[%s] discard %u frames for age\n",
1885 ether_sprintf(ni->ni_macaddr),
1887 IEEE80211_NODE_STAT_ADD(ni,
1888 ps_discard, discard);
1889 if (IEEE80211_NODE_SAVEQ_QLEN(ni) == 0)
1890 ic->ic_set_tim(ni, 0);
1894 * Probe the station before time it out. We
1895 * send a null data frame which may not be
1896 * universally supported by drivers (need it
1897 * for ps-poll support so it should be...).
1899 if (0 < ni->ni_inact &&
1900 ni->ni_inact <= ic->ic_inact_probe) {
1902 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE,
1904 "probe station due to inactivity");
1906 * Grab a reference before unlocking the table
1907 * so the node cannot be reclaimed before we
1908 * send the frame. ieee80211_send_nulldata
1909 * understands we've done this and reclaims the
1910 * ref for us as needed.
1912 ieee80211_ref_node(ni);
1913 IEEE80211_NODE_UNLOCK(nt);
1914 ieee80211_send_nulldata(ni);
1919 if (ni->ni_inact <= 0) {
1921 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, ni,
1922 "station timed out due to inactivity "
1923 "(refcnt %u)", ieee80211_node_refcnt(ni));
1925 * Send a deauthenticate frame and drop the station.
1926 * This is somewhat complicated due to reference counts
1927 * and locking. At this point a station will typically
1928 * have a reference count of 1. ieee80211_node_leave
1929 * will do a "free" of the node which will drop the
1930 * reference count. But in the meantime a reference
1931 * wil be held by the deauth frame. The actual reclaim
1932 * of the node will happen either after the tx is
1933 * completed or by ieee80211_node_leave.
1935 * Separately we must drop the node lock before sending
1936 * in case the driver takes a lock, as this will result
1937 * in LOR between the node lock and the driver lock.
1939 IEEE80211_NODE_UNLOCK(nt);
1940 if (ni->ni_associd != 0) {
1941 IEEE80211_SEND_MGMT(ic, ni,
1942 IEEE80211_FC0_SUBTYPE_DEAUTH,
1943 IEEE80211_REASON_AUTH_EXPIRE);
1945 ieee80211_node_leave(ic, ni);
1946 ic->ic_stats.is_node_timeout++;
1950 IEEE80211_NODE_UNLOCK(nt);
1952 IEEE80211_SCAN_UNLOCK(nt);
1954 nt->nt_inact_timer = IEEE80211_INACT_WAIT;
1958 ieee80211_iterate_nodes(struct ieee80211_node_table *nt, ieee80211_iter_func *f, void *arg)
1960 struct ieee80211_node *ni;
1963 IEEE80211_SCAN_LOCK(nt);
1964 gen = ++nt->nt_scangen;
1966 IEEE80211_NODE_LOCK(nt);
1967 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) {
1968 if (ni->ni_scangen != gen) {
1969 ni->ni_scangen = gen;
1970 (void) ieee80211_ref_node(ni);
1971 IEEE80211_NODE_UNLOCK(nt);
1973 ieee80211_free_node(ni);
1977 IEEE80211_NODE_UNLOCK(nt);
1979 IEEE80211_SCAN_UNLOCK(nt);
1983 ieee80211_dump_node(struct ieee80211_node_table *nt, struct ieee80211_node *ni)
1985 printf("0x%p: mac %s refcnt %d\n", ni,
1986 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni));
1987 printf("\tscangen %u authmode %u flags 0x%x\n",
1988 ni->ni_scangen, ni->ni_authmode, ni->ni_flags);
1989 printf("\tassocid 0x%x txpower %u vlan %u\n",
1990 ni->ni_associd, ni->ni_txpower, ni->ni_vlan);
1991 printf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n",
1992 ni->ni_txseqs[IEEE80211_NONQOS_TID],
1993 ni->ni_rxseqs[IEEE80211_NONQOS_TID] >> IEEE80211_SEQ_SEQ_SHIFT,
1994 ni->ni_rxseqs[IEEE80211_NONQOS_TID] & IEEE80211_SEQ_FRAG_MASK,
1995 ni->ni_rxfragstamp);
1996 printf("\trstamp %u rssi %u intval %u capinfo 0x%x\n",
1997 ni->ni_rstamp, ni->ni_rssi, ni->ni_intval, ni->ni_capinfo);
1998 printf("\tbssid %s essid \"%.*s\" channel %u:0x%x\n",
1999 ether_sprintf(ni->ni_bssid),
2000 ni->ni_esslen, ni->ni_essid,
2001 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags);
2002 printf("\tfails %u inact %u txrate %u\n",
2003 ni->ni_fails, ni->ni_inact, ni->ni_txrate);
2007 ieee80211_dump_nodes(struct ieee80211_node_table *nt)
2009 ieee80211_iterate_nodes(nt,
2010 (ieee80211_iter_func *) ieee80211_dump_node, nt);
2014 * Handle a station joining an 11g network.
2017 ieee80211_node_join_11g(struct ieee80211com *ic, struct ieee80211_node *ni)
2021 * Station isn't capable of short slot time. Bump
2022 * the count of long slot time stations and disable
2023 * use of short slot time. Note that the actual switch
2024 * over to long slot time use may not occur until the
2025 * next beacon transmission (per sec. 7.3.1.4 of 11g).
2027 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) {
2028 ic->ic_longslotsta++;
2029 IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC,
2030 "[%s] station needs long slot time, count %d\n",
2031 ether_sprintf(ni->ni_macaddr), ic->ic_longslotsta);
2032 /* XXX vap's w/ conflicting needs won't work */
2033 ieee80211_set_shortslottime(ic, 0);
2036 * If the new station is not an ERP station
2037 * then bump the counter and enable protection
2040 if (!ieee80211_iserp_rateset(ic, &ni->ni_rates)) {
2042 IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC,
2043 "[%s] station is !ERP, %d non-ERP stations associated\n",
2044 ether_sprintf(ni->ni_macaddr), ic->ic_nonerpsta);
2046 * If protection is configured, enable it.
2048 if (ic->ic_protmode != IEEE80211_PROT_NONE) {
2049 IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC,
2050 "%s: enable use of protection\n", __func__);
2051 ic->ic_flags |= IEEE80211_F_USEPROT;
2054 * If station does not support short preamble
2055 * then we must enable use of Barker preamble.
2057 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) {
2058 IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC,
2059 "[%s] station needs long preamble\n",
2060 ether_sprintf(ni->ni_macaddr));
2061 ic->ic_flags |= IEEE80211_F_USEBARKER;
2062 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE;
2064 if (ic->ic_nonerpsta == 1)
2065 ic->ic_flags_ext |= IEEE80211_FEXT_ERPUPDATE;
2067 ni->ni_flags |= IEEE80211_NODE_ERP;
2071 ieee80211_node_join(struct ieee80211com *ic, struct ieee80211_node *ni, int resp)
2075 if (ni->ni_associd == 0) {
2079 * It would be good to search the bitmap
2080 * more efficiently, but this will do for now.
2082 for (aid = 1; aid < ic->ic_max_aid; aid++) {
2083 if (!IEEE80211_AID_ISSET(aid,
2087 if (aid >= ic->ic_max_aid) {
2088 IEEE80211_SEND_MGMT(ic, ni, resp,
2089 IEEE80211_REASON_ASSOC_TOOMANY);
2090 ieee80211_node_leave(ic, ni);
2093 ni->ni_associd = aid | 0xc000;
2094 IEEE80211_AID_SET(ni->ni_associd, ic->ic_aid_bitmap);
2097 if (ic->ic_curmode == IEEE80211_MODE_11G &&
2098 IEEE80211_IS_CHAN_FULL(ni->ni_chan))
2099 ieee80211_node_join_11g(ic, ni);
2103 IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG,
2104 "[%s] station %sassociated at aid %d: %s preamble, %s slot time%s%s\n",
2105 ether_sprintf(ni->ni_macaddr), newassoc ? "" : "re",
2106 IEEE80211_NODE_AID(ni),
2107 ic->ic_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long",
2108 ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long",
2109 ic->ic_flags & IEEE80211_F_USEPROT ? ", protection" : "",
2110 ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : ""
2113 /* give driver a chance to setup state like ni_txrate */
2114 if (ic->ic_newassoc != NULL)
2115 ic->ic_newassoc(ni, newassoc);
2116 ni->ni_inact_reload = ic->ic_inact_auth;
2117 ni->ni_inact = ni->ni_inact_reload;
2118 IEEE80211_SEND_MGMT(ic, ni, resp, IEEE80211_STATUS_SUCCESS);
2119 /* tell the authenticator about new station */
2120 if (ic->ic_auth->ia_node_join != NULL)
2121 ic->ic_auth->ia_node_join(ic, ni);
2122 ieee80211_notify_node_join(ic, ni, newassoc);
2126 * Handle a station leaving an 11g network.
2129 ieee80211_node_leave_11g(struct ieee80211com *ic, struct ieee80211_node *ni)
2132 KASSERT(ic->ic_curmode == IEEE80211_MODE_11G,
2133 ("not in 11g, bss %u:0x%x, curmode %u", ni->ni_chan->ic_freq,
2134 ni->ni_chan->ic_flags, ic->ic_curmode));
2137 * If a long slot station do the slot time bookkeeping.
2139 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) {
2140 KASSERT(ic->ic_longslotsta > 0,
2141 ("bogus long slot station count %d", ic->ic_longslotsta));
2142 ic->ic_longslotsta--;
2143 IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC,
2144 "[%s] long slot time station leaves, count now %d\n",
2145 ether_sprintf(ni->ni_macaddr), ic->ic_longslotsta);
2146 if (ic->ic_longslotsta == 0) {
2148 * Re-enable use of short slot time if supported
2149 * and not operating in IBSS mode (per spec).
2151 if ((ic->ic_caps & IEEE80211_C_SHSLOT) &&
2152 ic->ic_opmode != IEEE80211_M_IBSS) {
2153 IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC,
2154 "%s: re-enable use of short slot time\n",
2156 ieee80211_set_shortslottime(ic, 1);
2161 * If a non-ERP station do the protection-related bookkeeping.
2163 if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) {
2164 KASSERT(ic->ic_nonerpsta > 0,
2165 ("bogus non-ERP station count %d", ic->ic_nonerpsta));
2167 IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC,
2168 "[%s] non-ERP station leaves, count now %d\n",
2169 ether_sprintf(ni->ni_macaddr), ic->ic_nonerpsta);
2170 if (ic->ic_nonerpsta == 0) {
2171 IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC,
2172 "%s: disable use of protection\n", __func__);
2173 ic->ic_flags &= ~IEEE80211_F_USEPROT;
2174 /* XXX verify mode? */
2175 if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) {
2176 IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC,
2177 "%s: re-enable use of short preamble\n",
2179 ic->ic_flags |= IEEE80211_F_SHPREAMBLE;
2180 ic->ic_flags &= ~IEEE80211_F_USEBARKER;
2182 ic->ic_flags_ext |= IEEE80211_FEXT_ERPUPDATE;
2188 * Handle bookkeeping for station deauthentication/disassociation
2189 * when operating as an ap.
2192 ieee80211_node_leave(struct ieee80211com *ic, struct ieee80211_node *ni)
2194 struct ieee80211_node_table *nt = ni->ni_table;
2196 IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG,
2197 "[%s] station with aid %d leaves\n",
2198 ether_sprintf(ni->ni_macaddr), IEEE80211_NODE_AID(ni));
2200 KASSERT(ic->ic_opmode == IEEE80211_M_HOSTAP ||
2201 ic->ic_opmode == IEEE80211_M_IBSS ||
2202 ic->ic_opmode == IEEE80211_M_AHDEMO,
2203 ("unexpected operating mode %u", ic->ic_opmode));
2205 * If node wasn't previously associated all
2206 * we need to do is reclaim the reference.
2208 /* XXX ibss mode bypasses 11g and notification */
2209 if (ni->ni_associd == 0)
2212 * Tell the authenticator the station is leaving.
2213 * Note that we must do this before yanking the
2214 * association id as the authenticator uses the
2215 * associd to locate it's state block.
2217 if (ic->ic_auth->ia_node_leave != NULL)
2218 ic->ic_auth->ia_node_leave(ic, ni);
2219 IEEE80211_AID_CLR(ni->ni_associd, ic->ic_aid_bitmap);
2223 if (ic->ic_curmode == IEEE80211_MODE_11G &&
2224 IEEE80211_IS_CHAN_FULL(ni->ni_chan))
2225 ieee80211_node_leave_11g(ic, ni);
2227 * Cleanup station state. In particular clear various
2228 * state that might otherwise be reused if the node
2229 * is reused before the reference count goes to zero
2230 * (and memory is reclaimed).
2232 ieee80211_sta_leave(ic, ni);
2235 * Remove the node from any table it's recorded in and
2236 * drop the caller's reference. Removal from the table
2237 * is important to insure the node is not reprocessed
2241 IEEE80211_NODE_LOCK(nt);
2242 node_reclaim(nt, ni);
2243 IEEE80211_NODE_UNLOCK(nt);
2245 ieee80211_free_node(ni);
2249 ieee80211_getrssi(struct ieee80211com *ic)
2251 #define NZ(x) ((x) == 0 ? 1 : (x))
2252 struct ieee80211_node_table *nt = &ic->ic_sta;
2253 u_int32_t rssi_samples, rssi_total;
2254 struct ieee80211_node *ni;
2258 switch (ic->ic_opmode) {
2259 case IEEE80211_M_IBSS: /* average of all ibss neighbors */
2261 TAILQ_FOREACH(ni, &nt->nt_node, ni_list)
2262 if (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) {
2264 rssi_total += ic->ic_node_getrssi(ni);
2267 case IEEE80211_M_AHDEMO: /* average of all neighbors */
2269 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) {
2271 rssi_total += ic->ic_node_getrssi(ni);
2274 case IEEE80211_M_HOSTAP: /* average of all associated stations */
2276 TAILQ_FOREACH(ni, &nt->nt_node, ni_list)
2277 if (IEEE80211_AID(ni->ni_associd) != 0) {
2279 rssi_total += ic->ic_node_getrssi(ni);
2282 case IEEE80211_M_MONITOR: /* XXX */
2283 case IEEE80211_M_STA: /* use stats from associated ap */
2285 if (ic->ic_bss != NULL)
2286 rssi_total = ic->ic_node_getrssi(ic->ic_bss);
2290 return rssi_total / NZ(rssi_samples);
2295 * Indicate whether there are frames queued for a station in power-save mode.
2298 ieee80211_set_tim(struct ieee80211_node *ni, int set)
2300 struct ieee80211com *ic = ni->ni_ic;
2303 KASSERT(ic->ic_opmode == IEEE80211_M_HOSTAP ||
2304 ic->ic_opmode == IEEE80211_M_IBSS,
2305 ("operating mode %u", ic->ic_opmode));
2307 aid = IEEE80211_AID(ni->ni_associd);
2308 KASSERT(aid < ic->ic_max_aid,
2309 ("bogus aid %u, max %u", aid, ic->ic_max_aid));
2311 IEEE80211_BEACON_LOCK(ic);
2312 if (set != (isset(ic->ic_tim_bitmap, aid) != 0)) {
2314 setbit(ic->ic_tim_bitmap, aid);
2315 ic->ic_ps_pending++;
2317 clrbit(ic->ic_tim_bitmap, aid);
2318 ic->ic_ps_pending--;
2320 ic->ic_flags |= IEEE80211_F_TIMUPDATE;
2322 IEEE80211_BEACON_UNLOCK(ic);
2326 * Node table support.
2330 ieee80211_node_table_init(struct ieee80211com *ic,
2331 struct ieee80211_node_table *nt,
2332 const char *name, int inact, int keyixmax,
2333 void (*timeout)(struct ieee80211_node_table *))
2336 IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE,
2337 "%s %s table, inact %u\n", __func__, name, inact);
2341 IEEE80211_NODE_LOCK_INIT(nt, ic->ic_ifp->if_xname);
2342 IEEE80211_SCAN_LOCK_INIT(nt, ic->ic_ifp->if_xname);
2343 TAILQ_INIT(&nt->nt_node);
2346 nt->nt_inact_init = inact;
2347 nt->nt_timeout = timeout;
2348 nt->nt_keyixmax = keyixmax;
2349 if (nt->nt_keyixmax > 0) {
2350 MALLOC(nt->nt_keyixmap, struct ieee80211_node **,
2351 keyixmax * sizeof(struct ieee80211_node *),
2352 M_80211_NODE, M_NOWAIT | M_ZERO);
2353 if (nt->nt_keyixmap == NULL)
2354 if_printf(ic->ic_ifp,
2355 "Cannot allocate key index map with %u entries\n",
2358 nt->nt_keyixmap = NULL;
2362 ieee80211_node_table_reset(struct ieee80211_node_table *nt)
2365 IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE,
2366 "%s %s table\n", __func__, nt->nt_name);
2368 IEEE80211_NODE_LOCK(nt);
2369 nt->nt_inact_timer = 0;
2370 ieee80211_free_allnodes_locked(nt);
2371 IEEE80211_NODE_UNLOCK(nt);
2375 ieee80211_node_table_cleanup(struct ieee80211_node_table *nt)
2378 IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE,
2379 "%s %s table\n", __func__, nt->nt_name);
2381 IEEE80211_NODE_LOCK(nt);
2382 ieee80211_free_allnodes_locked(nt);
2383 if (nt->nt_keyixmap != NULL) {
2384 /* XXX verify all entries are NULL */
2386 for (i = 0; i < nt->nt_keyixmax; i++)
2387 if (nt->nt_keyixmap[i] != NULL)
2388 printf("%s: %s[%u] still active\n", __func__,
2390 FREE(nt->nt_keyixmap, M_80211_NODE);
2391 nt->nt_keyixmap = NULL;
2393 IEEE80211_SCAN_LOCK_DESTROY(nt);
2394 IEEE80211_NODE_LOCK_DESTROY(nt);