ieee80211_node.c revision 165569
1116742Ssam/*- 2116904Ssam * Copyright (c) 2001 Atsushi Onoe 3139530Ssam * Copyright (c) 2002-2005 Sam Leffler, Errno Consulting 4116742Ssam * All rights reserved. 5116742Ssam * 6116742Ssam * Redistribution and use in source and binary forms, with or without 7116742Ssam * modification, are permitted provided that the following conditions 8116742Ssam * are met: 9116742Ssam * 1. Redistributions of source code must retain the above copyright 10116904Ssam * notice, this list of conditions and the following disclaimer. 11116904Ssam * 2. Redistributions in binary form must reproduce the above copyright 12116904Ssam * notice, this list of conditions and the following disclaimer in the 13116904Ssam * documentation and/or other materials provided with the distribution. 14116904Ssam * 3. The name of the author may not be used to endorse or promote products 15116904Ssam * derived from this software without specific prior written permission. 16116742Ssam * 17116742Ssam * Alternatively, this software may be distributed under the terms of the 18116742Ssam * GNU General Public License ("GPL") version 2 as published by the Free 19116742Ssam * Software Foundation. 20116742Ssam * 21116904Ssam * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22116904Ssam * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23116904Ssam * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24116904Ssam * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25116904Ssam * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26116904Ssam * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27116904Ssam * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28116904Ssam * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29116904Ssam * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30116904Ssam * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31116742Ssam */ 32116742Ssam 33116742Ssam#include <sys/cdefs.h> 34116742Ssam__FBSDID("$FreeBSD: head/sys/net80211/ieee80211_node.c 165569 2006-12-27 18:46:18Z sam $"); 35116742Ssam 36116742Ssam#include <sys/param.h> 37116742Ssam#include <sys/systm.h> 38116742Ssam#include <sys/mbuf.h> 39116742Ssam#include <sys/malloc.h> 40116742Ssam#include <sys/kernel.h> 41138568Ssam 42116742Ssam#include <sys/socket.h> 43116742Ssam 44116742Ssam#include <net/if.h> 45116742Ssam#include <net/if_media.h> 46116742Ssam#include <net/ethernet.h> 47116742Ssam 48116742Ssam#include <net80211/ieee80211_var.h> 49116742Ssam 50116742Ssam#include <net/bpf.h> 51116742Ssam 52147221Ssam/* 53147221Ssam * Association id's are managed with a bit vector. 54147221Ssam */ 55147221Ssam#define IEEE80211_AID_SET(b, w) \ 56147221Ssam ((w)[IEEE80211_AID(b) / 32] |= (1 << (IEEE80211_AID(b) % 32))) 57147221Ssam#define IEEE80211_AID_CLR(b, w) \ 58147221Ssam ((w)[IEEE80211_AID(b) / 32] &= ~(1 << (IEEE80211_AID(b) % 32))) 59147221Ssam#define IEEE80211_AID_ISSET(b, w) \ 60147221Ssam ((w)[IEEE80211_AID(b) / 32] & (1 << (IEEE80211_AID(b) % 32))) 61147221Ssam 62159139Sdds#ifdef IEEE80211_DEBUG_REFCNT 63159139Sdds#define REFCNT_LOC "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line 64159139Sdds#else 65159139Sdds#define REFCNT_LOC "%s %p<%s> refcnt %d\n", __func__ 66159139Sdds#endif 67159139Sdds 68138568Ssamstatic struct ieee80211_node *node_alloc(struct ieee80211_node_table *); 69138568Ssamstatic void node_cleanup(struct ieee80211_node *); 70138568Ssamstatic void node_free(struct ieee80211_node *); 71138568Ssamstatic u_int8_t node_getrssi(const struct ieee80211_node *); 72116742Ssam 73138568Ssamstatic void ieee80211_setup_node(struct ieee80211_node_table *, 74138568Ssam struct ieee80211_node *, const u_int8_t *); 75138568Ssamstatic void _ieee80211_free_node(struct ieee80211_node *); 76138568Ssamstatic void ieee80211_free_allnodes(struct ieee80211_node_table *); 77120104Ssam 78138568Ssamstatic void ieee80211_timeout_scan_candidates(struct ieee80211_node_table *); 79138568Ssamstatic void ieee80211_timeout_stations(struct ieee80211_node_table *); 80116742Ssam 81148304Ssamstatic void ieee80211_set_tim(struct ieee80211_node *, int set); 82138568Ssam 83138568Ssamstatic void ieee80211_node_table_init(struct ieee80211com *ic, 84148863Ssam struct ieee80211_node_table *nt, const char *name, 85148863Ssam int inact, int keyixmax, 86138568Ssam void (*timeout)(struct ieee80211_node_table *)); 87138568Ssamstatic void ieee80211_node_table_cleanup(struct ieee80211_node_table *nt); 88138568Ssam 89127876SsamMALLOC_DEFINE(M_80211_NODE, "80211node", "802.11 node state"); 90120481Ssam 91116742Ssamvoid 92138568Ssamieee80211_node_attach(struct ieee80211com *ic) 93116742Ssam{ 94116742Ssam 95138568Ssam ic->ic_node_alloc = node_alloc; 96138568Ssam ic->ic_node_free = node_free; 97138568Ssam ic->ic_node_cleanup = node_cleanup; 98138568Ssam ic->ic_node_getrssi = node_getrssi; 99138568Ssam 100138568Ssam /* default station inactivity timer setings */ 101138568Ssam ic->ic_inact_init = IEEE80211_INACT_INIT; 102138568Ssam ic->ic_inact_auth = IEEE80211_INACT_AUTH; 103138568Ssam ic->ic_inact_run = IEEE80211_INACT_RUN; 104138568Ssam ic->ic_inact_probe = IEEE80211_INACT_PROBE; 105138568Ssam 106148863Ssam /* NB: driver should override */ 107148863Ssam ic->ic_max_aid = IEEE80211_AID_DEF; 108148863Ssam ic->ic_set_tim = ieee80211_set_tim; 109148863Ssam} 110148863Ssam 111148863Ssamvoid 112148863Ssamieee80211_node_lateattach(struct ieee80211com *ic) 113148863Ssam{ 114148863Ssam struct ieee80211_rsnparms *rsn; 115148863Ssam 116148863Ssam if (ic->ic_max_aid > IEEE80211_AID_MAX) 117138568Ssam ic->ic_max_aid = IEEE80211_AID_MAX; 118138568Ssam MALLOC(ic->ic_aid_bitmap, u_int32_t *, 119138568Ssam howmany(ic->ic_max_aid, 32) * sizeof(u_int32_t), 120138568Ssam M_DEVBUF, M_NOWAIT | M_ZERO); 121138568Ssam if (ic->ic_aid_bitmap == NULL) { 122138568Ssam /* XXX no way to recover */ 123138568Ssam printf("%s: no memory for AID bitmap!\n", __func__); 124138568Ssam ic->ic_max_aid = 0; 125138568Ssam } 126138568Ssam 127138568Ssam /* XXX defer until using hostap/ibss mode */ 128138568Ssam ic->ic_tim_len = howmany(ic->ic_max_aid, 8) * sizeof(u_int8_t); 129138568Ssam MALLOC(ic->ic_tim_bitmap, u_int8_t *, ic->ic_tim_len, 130138568Ssam M_DEVBUF, M_NOWAIT | M_ZERO); 131138568Ssam if (ic->ic_tim_bitmap == NULL) { 132138568Ssam /* XXX no way to recover */ 133138568Ssam printf("%s: no memory for TIM bitmap!\n", __func__); 134138568Ssam } 135118887Ssam 136148863Ssam ieee80211_node_table_init(ic, &ic->ic_sta, "station", 137148863Ssam IEEE80211_INACT_INIT, ic->ic_crypto.cs_max_keyix, 138148863Ssam ieee80211_timeout_stations); 139148863Ssam ieee80211_node_table_init(ic, &ic->ic_scan, "scan", 140148863Ssam IEEE80211_INACT_SCAN, 0, 141148863Ssam ieee80211_timeout_scan_candidates); 142118887Ssam 143148863Ssam ieee80211_reset_bss(ic); 144138568Ssam /* 145138568Ssam * Setup "global settings" in the bss node so that 146138568Ssam * each new station automatically inherits them. 147138568Ssam */ 148148863Ssam rsn = &ic->ic_bss->ni_rsn; 149138568Ssam /* WEP, TKIP, and AES-CCM are always supported */ 150138568Ssam rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_WEP; 151138568Ssam rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_TKIP; 152138568Ssam rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_AES_CCM; 153138568Ssam if (ic->ic_caps & IEEE80211_C_AES) 154138568Ssam rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_AES_OCB; 155138568Ssam if (ic->ic_caps & IEEE80211_C_CKIP) 156138568Ssam rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_CKIP; 157138568Ssam /* 158138568Ssam * Default unicast cipher to WEP for 802.1x use. If 159138568Ssam * WPA is enabled the management code will set these 160138568Ssam * values to reflect. 161138568Ssam */ 162138568Ssam rsn->rsn_ucastcipher = IEEE80211_CIPHER_WEP; 163138568Ssam rsn->rsn_ucastkeylen = 104 / NBBY; 164138568Ssam /* 165138568Ssam * WPA says the multicast cipher is the lowest unicast 166138568Ssam * cipher supported. But we skip WEP which would 167138568Ssam * otherwise be used based on this criteria. 168138568Ssam */ 169138568Ssam rsn->rsn_mcastcipher = IEEE80211_CIPHER_TKIP; 170138568Ssam rsn->rsn_mcastkeylen = 128 / NBBY; 171138568Ssam 172138568Ssam /* 173138568Ssam * We support both WPA-PSK and 802.1x; the one used 174138568Ssam * is determined by the authentication mode and the 175138568Ssam * setting of the PSK state. 176138568Ssam */ 177138568Ssam rsn->rsn_keymgmtset = WPA_ASE_8021X_UNSPEC | WPA_ASE_8021X_PSK; 178138568Ssam rsn->rsn_keymgmt = WPA_ASE_8021X_PSK; 179138568Ssam 180148863Ssam ic->ic_auth = ieee80211_authenticator_get(ic->ic_bss->ni_authmode); 181116742Ssam} 182116742Ssam 183116742Ssamvoid 184138568Ssamieee80211_node_detach(struct ieee80211com *ic) 185116742Ssam{ 186116742Ssam 187138568Ssam if (ic->ic_bss != NULL) { 188138568Ssam ieee80211_free_node(ic->ic_bss); 189138568Ssam ic->ic_bss = NULL; 190138568Ssam } 191138568Ssam ieee80211_node_table_cleanup(&ic->ic_scan); 192140753Ssam ieee80211_node_table_cleanup(&ic->ic_sta); 193138568Ssam if (ic->ic_aid_bitmap != NULL) { 194138568Ssam FREE(ic->ic_aid_bitmap, M_DEVBUF); 195138568Ssam ic->ic_aid_bitmap = NULL; 196138568Ssam } 197138568Ssam if (ic->ic_tim_bitmap != NULL) { 198138568Ssam FREE(ic->ic_tim_bitmap, M_DEVBUF); 199138568Ssam ic->ic_tim_bitmap = NULL; 200138568Ssam } 201116742Ssam} 202116742Ssam 203138568Ssam/* 204138568Ssam * Port authorize/unauthorize interfaces for use by an authenticator. 205138568Ssam */ 206138568Ssam 207138568Ssamvoid 208148302Ssamieee80211_node_authorize(struct ieee80211_node *ni) 209138568Ssam{ 210148302Ssam struct ieee80211com *ic = ni->ni_ic; 211148302Ssam 212138568Ssam ni->ni_flags |= IEEE80211_NODE_AUTH; 213139528Ssam ni->ni_inact_reload = ic->ic_inact_run; 214138568Ssam} 215138568Ssam 216138568Ssamvoid 217148302Ssamieee80211_node_unauthorize(struct ieee80211_node *ni) 218138568Ssam{ 219138568Ssam ni->ni_flags &= ~IEEE80211_NODE_AUTH; 220138568Ssam} 221138568Ssam 222116742Ssam/* 223138568Ssam * Set/change the channel. The rate set is also updated as 224138568Ssam * to insure a consistent view by drivers. 225138568Ssam */ 226153351Ssamstatic void 227138568Ssamieee80211_set_chan(struct ieee80211com *ic, 228138568Ssam struct ieee80211_node *ni, struct ieee80211_channel *chan) 229138568Ssam{ 230153351Ssam if (chan == IEEE80211_CHAN_ANYC) /* XXX while scanning */ 231153351Ssam chan = ic->ic_curchan; 232138568Ssam ni->ni_chan = chan; 233165569Ssam ni->ni_rates = *ieee80211_get_suprates(ic, chan); 234138568Ssam} 235138568Ssam 236138568Ssam/* 237116742Ssam * AP scanning support. 238116742Ssam */ 239116742Ssam 240138568Ssam#ifdef IEEE80211_DEBUG 241138568Ssamstatic void 242138568Ssamdump_chanlist(const u_char chans[]) 243138568Ssam{ 244138568Ssam const char *sep; 245138568Ssam int i; 246138568Ssam 247138568Ssam sep = " "; 248138568Ssam for (i = 0; i < IEEE80211_CHAN_MAX; i++) 249138568Ssam if (isset(chans, i)) { 250138568Ssam printf("%s%u", sep, i); 251138568Ssam sep = ", "; 252138568Ssam } 253138568Ssam} 254138568Ssam#endif /* IEEE80211_DEBUG */ 255138568Ssam 256116742Ssam/* 257138568Ssam * Initialize the channel set to scan based on the 258116742Ssam * of available channels and the current PHY mode. 259116742Ssam */ 260117811Ssamstatic void 261138568Ssamieee80211_reset_scan(struct ieee80211com *ic) 262116742Ssam{ 263116742Ssam 264138568Ssam /* XXX ic_des_chan should be handled with ic_chan_active */ 265138568Ssam if (ic->ic_des_chan != IEEE80211_CHAN_ANYC) { 266138568Ssam memset(ic->ic_chan_scan, 0, sizeof(ic->ic_chan_scan)); 267138568Ssam setbit(ic->ic_chan_scan, 268138568Ssam ieee80211_chan2ieee(ic, ic->ic_des_chan)); 269138568Ssam } else 270138568Ssam memcpy(ic->ic_chan_scan, ic->ic_chan_active, 271138568Ssam sizeof(ic->ic_chan_active)); 272138568Ssam#ifdef IEEE80211_DEBUG 273138568Ssam if (ieee80211_msg_scan(ic)) { 274138568Ssam printf("%s: scan set:", __func__); 275138568Ssam dump_chanlist(ic->ic_chan_scan); 276138568Ssam printf(" start chan %u\n", 277148936Ssam ieee80211_chan2ieee(ic, ic->ic_curchan)); 278138568Ssam } 279138568Ssam#endif /* IEEE80211_DEBUG */ 280116742Ssam} 281116742Ssam 282116742Ssam/* 283116742Ssam * Begin an active scan. 284116742Ssam */ 285116742Ssamvoid 286138568Ssamieee80211_begin_scan(struct ieee80211com *ic, int reset) 287116742Ssam{ 288116742Ssam 289138568Ssam ic->ic_scan.nt_scangen++; 290117811Ssam /* 291117811Ssam * In all but hostap mode scanning starts off in 292117811Ssam * an active mode before switching to passive. 293117811Ssam */ 294121180Ssam if (ic->ic_opmode != IEEE80211_M_HOSTAP) { 295117811Ssam ic->ic_flags |= IEEE80211_F_ASCAN; 296121180Ssam ic->ic_stats.is_scan_active++; 297121180Ssam } else 298121180Ssam ic->ic_stats.is_scan_passive++; 299139520Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, 300139520Ssam "begin %s scan in %s mode, scangen %u\n", 301138568Ssam (ic->ic_flags & IEEE80211_F_ASCAN) ? "active" : "passive", 302139520Ssam ieee80211_phymode_name[ic->ic_curmode], ic->ic_scan.nt_scangen); 303116742Ssam /* 304138568Ssam * Clear scan state and flush any previously seen AP's. 305116742Ssam */ 306138568Ssam ieee80211_reset_scan(ic); 307138568Ssam if (reset) 308138568Ssam ieee80211_free_allnodes(&ic->ic_scan); 309116742Ssam 310138568Ssam ic->ic_flags |= IEEE80211_F_SCAN; 311138568Ssam 312117811Ssam /* Scan the next channel. */ 313138568Ssam ieee80211_next_scan(ic); 314116742Ssam} 315116742Ssam 316116742Ssam/* 317116742Ssam * Switch to the next channel marked for scanning. 318116742Ssam */ 319138568Ssamint 320138568Ssamieee80211_next_scan(struct ieee80211com *ic) 321116742Ssam{ 322116742Ssam struct ieee80211_channel *chan; 323116742Ssam 324138568Ssam /* 325138568Ssam * Insure any previous mgt frame timeouts don't fire. 326138568Ssam * This assumes the driver does the right thing in 327138568Ssam * flushing anything queued in the driver and below. 328138568Ssam */ 329138568Ssam ic->ic_mgt_timer = 0; 330156358Ssam ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN; 331138568Ssam 332148936Ssam chan = ic->ic_curchan; 333138568Ssam do { 334116742Ssam if (++chan > &ic->ic_channels[IEEE80211_CHAN_MAX]) 335116742Ssam chan = &ic->ic_channels[0]; 336116742Ssam if (isset(ic->ic_chan_scan, ieee80211_chan2ieee(ic, chan))) { 337138568Ssam clrbit(ic->ic_chan_scan, ieee80211_chan2ieee(ic, chan)); 338138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, 339138568Ssam "%s: chan %d->%d\n", __func__, 340148936Ssam ieee80211_chan2ieee(ic, ic->ic_curchan), 341138568Ssam ieee80211_chan2ieee(ic, chan)); 342148936Ssam ic->ic_curchan = chan; 343148936Ssam /* 344148936Ssam * XXX drivers should do this as needed, 345148936Ssam * XXX for now maintain compatibility 346148936Ssam */ 347165569Ssam ic->ic_bss->ni_rates = *ieee80211_get_suprates(ic, chan); 348138568Ssam ieee80211_new_state(ic, IEEE80211_S_SCAN, -1); 349138568Ssam return 1; 350116742Ssam } 351148936Ssam } while (chan != ic->ic_curchan); 352138568Ssam ieee80211_end_scan(ic); 353138568Ssam return 0; 354116742Ssam} 355116742Ssam 356156358Ssam/* 357156358Ssam * Probe the curent channel, if allowed, while scanning. 358156358Ssam * If the channel is not marked passive-only then send 359156358Ssam * a probe request immediately. Otherwise mark state and 360156358Ssam * listen for beacons on the channel; if we receive something 361156358Ssam * then we'll transmit a probe request. 362156358Ssam */ 363156358Ssamvoid 364156358Ssamieee80211_probe_curchan(struct ieee80211com *ic, int force) 365156358Ssam{ 366156358Ssam struct ifnet *ifp = ic->ic_ifp; 367156358Ssam 368156358Ssam if ((ic->ic_curchan->ic_flags & IEEE80211_CHAN_PASSIVE) == 0 || force) { 369156358Ssam /* 370156358Ssam * XXX send both broadcast+directed probe request 371156358Ssam */ 372156358Ssam ieee80211_send_probereq(ic->ic_bss, 373156358Ssam ic->ic_myaddr, ifp->if_broadcastaddr, 374156358Ssam ifp->if_broadcastaddr, 375156358Ssam ic->ic_des_essid, ic->ic_des_esslen, 376156358Ssam ic->ic_opt_ie, ic->ic_opt_ie_len); 377156358Ssam } else 378156358Ssam ic->ic_flags_ext |= IEEE80211_FEXT_PROBECHAN; 379156358Ssam} 380156358Ssam 381141658Ssamstatic __inline void 382141658Ssamcopy_bss(struct ieee80211_node *nbss, const struct ieee80211_node *obss) 383141658Ssam{ 384141658Ssam /* propagate useful state */ 385141658Ssam nbss->ni_authmode = obss->ni_authmode; 386141658Ssam nbss->ni_txpower = obss->ni_txpower; 387141658Ssam nbss->ni_vlan = obss->ni_vlan; 388141658Ssam nbss->ni_rsn = obss->ni_rsn; 389141658Ssam /* XXX statistics? */ 390141658Ssam} 391141658Ssam 392116742Ssamvoid 393116742Ssamieee80211_create_ibss(struct ieee80211com* ic, struct ieee80211_channel *chan) 394116742Ssam{ 395140753Ssam struct ieee80211_node_table *nt; 396116742Ssam struct ieee80211_node *ni; 397116742Ssam 398138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, 399138568Ssam "%s: creating ibss\n", __func__); 400138568Ssam 401138568Ssam /* 402138568Ssam * Create the station/neighbor table. Note that for adhoc 403138568Ssam * mode we make the initial inactivity timer longer since 404138568Ssam * we create nodes only through discovery and they typically 405138568Ssam * are long-lived associations. 406138568Ssam */ 407140753Ssam nt = &ic->ic_sta; 408140753Ssam IEEE80211_NODE_LOCK(nt); 409140753Ssam if (ic->ic_opmode == IEEE80211_M_HOSTAP) { 410140753Ssam nt->nt_name = "station"; 411140753Ssam nt->nt_inact_init = ic->ic_inact_init; 412140753Ssam } else { 413140753Ssam nt->nt_name = "neighbor"; 414140753Ssam nt->nt_inact_init = ic->ic_inact_run; 415140753Ssam } 416140753Ssam IEEE80211_NODE_UNLOCK(nt); 417140753Ssam 418148863Ssam ni = ieee80211_alloc_node(&ic->ic_sta, ic->ic_myaddr); 419140753Ssam if (ni == NULL) { 420140753Ssam /* XXX recovery? */ 421138568Ssam return; 422138568Ssam } 423116742Ssam IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_myaddr); 424116742Ssam ni->ni_esslen = ic->ic_des_esslen; 425116742Ssam memcpy(ni->ni_essid, ic->ic_des_essid, ni->ni_esslen); 426141658Ssam copy_bss(ni, ic->ic_bss); 427148843Ssam ni->ni_intval = ic->ic_bintval; 428138568Ssam if (ic->ic_flags & IEEE80211_F_PRIVACY) 429116742Ssam ni->ni_capinfo |= IEEE80211_CAPINFO_PRIVACY; 430116742Ssam if (ic->ic_phytype == IEEE80211_T_FH) { 431116742Ssam ni->ni_fhdwell = 200; /* XXX */ 432116742Ssam ni->ni_fhindex = 1; 433116742Ssam } 434138568Ssam if (ic->ic_opmode == IEEE80211_M_IBSS) { 435138568Ssam ic->ic_flags |= IEEE80211_F_SIBSS; 436138568Ssam ni->ni_capinfo |= IEEE80211_CAPINFO_IBSS; /* XXX */ 437143300Ssam if (ic->ic_flags & IEEE80211_F_DESBSSID) 438143300Ssam IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_des_bssid); 439143300Ssam else 440143300Ssam ni->ni_bssid[0] |= 0x02; /* local bit for IBSS */ 441153403Ssam } else if (ic->ic_opmode == IEEE80211_M_AHDEMO) { 442153403Ssam if (ic->ic_flags & IEEE80211_F_DESBSSID) 443153403Ssam IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_des_bssid); 444153403Ssam else 445153403Ssam memset(ni->ni_bssid, 0, IEEE80211_ADDR_LEN); 446138568Ssam } 447138568Ssam /* 448138568Ssam * Fix the channel and related attributes. 449138568Ssam */ 450138568Ssam ieee80211_set_chan(ic, ni, chan); 451148936Ssam ic->ic_curchan = chan; 452138568Ssam ic->ic_curmode = ieee80211_chan2mode(ic, chan); 453138568Ssam /* 454138568Ssam * Do mode-specific rate setup. 455138568Ssam */ 456138568Ssam if (ic->ic_curmode == IEEE80211_MODE_11G) { 457138568Ssam /* 458138568Ssam * Use a mixed 11b/11g rate set. 459138568Ssam */ 460138568Ssam ieee80211_set11gbasicrates(&ni->ni_rates, IEEE80211_MODE_11G); 461138568Ssam } else if (ic->ic_curmode == IEEE80211_MODE_11B) { 462138568Ssam /* 463138568Ssam * Force pure 11b rate set. 464138568Ssam */ 465138568Ssam ieee80211_set11gbasicrates(&ni->ni_rates, IEEE80211_MODE_11B); 466138568Ssam } 467138568Ssam 468140753Ssam (void) ieee80211_sta_join(ic, ieee80211_ref_node(ni)); 469116742Ssam} 470116742Ssam 471138568Ssamvoid 472138568Ssamieee80211_reset_bss(struct ieee80211com *ic) 473138568Ssam{ 474138568Ssam struct ieee80211_node *ni, *obss; 475138568Ssam 476138568Ssam ieee80211_node_table_reset(&ic->ic_scan); 477140753Ssam ieee80211_node_table_reset(&ic->ic_sta); 478140753Ssam 479138568Ssam ni = ieee80211_alloc_node(&ic->ic_scan, ic->ic_myaddr); 480138568Ssam KASSERT(ni != NULL, ("unable to setup inital BSS node")); 481138568Ssam obss = ic->ic_bss; 482138568Ssam ic->ic_bss = ieee80211_ref_node(ni); 483141658Ssam if (obss != NULL) { 484141658Ssam copy_bss(ni, obss); 485148843Ssam ni->ni_intval = ic->ic_bintval; 486138568Ssam ieee80211_free_node(obss); 487141658Ssam } 488138568Ssam} 489138568Ssam 490148432Ssam/* XXX tunable */ 491148432Ssam#define STA_FAILS_MAX 2 /* assoc failures before ignored */ 492148432Ssam 493127767Ssamstatic int 494138568Ssamieee80211_match_bss(struct ieee80211com *ic, struct ieee80211_node *ni) 495127767Ssam{ 496127767Ssam u_int8_t rate; 497127767Ssam int fail; 498127767Ssam 499127767Ssam fail = 0; 500127767Ssam if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 501127767Ssam fail |= 0x01; 502127767Ssam if (ic->ic_des_chan != IEEE80211_CHAN_ANYC && 503127767Ssam ni->ni_chan != ic->ic_des_chan) 504127767Ssam fail |= 0x01; 505127767Ssam if (ic->ic_opmode == IEEE80211_M_IBSS) { 506127767Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 507127767Ssam fail |= 0x02; 508127767Ssam } else { 509127767Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 510127767Ssam fail |= 0x02; 511127767Ssam } 512138568Ssam if (ic->ic_flags & IEEE80211_F_PRIVACY) { 513127767Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 514127767Ssam fail |= 0x04; 515127767Ssam } else { 516127767Ssam /* XXX does this mean privacy is supported or required? */ 517127767Ssam if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 518127767Ssam fail |= 0x04; 519127767Ssam } 520148299Ssam rate = ieee80211_fix_rate(ni, IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 521127767Ssam if (rate & IEEE80211_RATE_BASIC) 522127767Ssam fail |= 0x08; 523127767Ssam if (ic->ic_des_esslen != 0 && 524127767Ssam (ni->ni_esslen != ic->ic_des_esslen || 525127767Ssam memcmp(ni->ni_essid, ic->ic_des_essid, ic->ic_des_esslen) != 0)) 526127767Ssam fail |= 0x10; 527127767Ssam if ((ic->ic_flags & IEEE80211_F_DESBSSID) && 528127767Ssam !IEEE80211_ADDR_EQ(ic->ic_des_bssid, ni->ni_bssid)) 529127767Ssam fail |= 0x20; 530148432Ssam if (ni->ni_fails >= STA_FAILS_MAX) 531148432Ssam fail |= 0x40; 532127767Ssam#ifdef IEEE80211_DEBUG 533138568Ssam if (ieee80211_msg_scan(ic)) { 534148432Ssam printf(" %c %s", 535148432Ssam fail & 0x40 ? '=' : fail & 0x80 ? '^' : fail ? '-' : '+', 536127767Ssam ether_sprintf(ni->ni_macaddr)); 537127767Ssam printf(" %s%c", ether_sprintf(ni->ni_bssid), 538127767Ssam fail & 0x20 ? '!' : ' '); 539127767Ssam printf(" %3d%c", ieee80211_chan2ieee(ic, ni->ni_chan), 540127767Ssam fail & 0x01 ? '!' : ' '); 541127767Ssam printf(" %+4d", ni->ni_rssi); 542127767Ssam printf(" %2dM%c", (rate & IEEE80211_RATE_VAL) / 2, 543127767Ssam fail & 0x08 ? '!' : ' '); 544127767Ssam printf(" %4s%c", 545127767Ssam (ni->ni_capinfo & IEEE80211_CAPINFO_ESS) ? "ess" : 546127767Ssam (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) ? "ibss" : 547127767Ssam "????", 548127767Ssam fail & 0x02 ? '!' : ' '); 549127767Ssam printf(" %3s%c ", 550127767Ssam (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) ? 551127767Ssam "wep" : "no", 552127767Ssam fail & 0x04 ? '!' : ' '); 553127767Ssam ieee80211_print_essid(ni->ni_essid, ni->ni_esslen); 554127767Ssam printf("%s\n", fail & 0x10 ? "!" : ""); 555127767Ssam } 556127767Ssam#endif 557127767Ssam return fail; 558127767Ssam} 559127767Ssam 560138568Ssamstatic __inline u_int8_t 561138568Ssammaxrate(const struct ieee80211_node *ni) 562138568Ssam{ 563138568Ssam const struct ieee80211_rateset *rs = &ni->ni_rates; 564138568Ssam /* NB: assumes rate set is sorted (happens on frame receive) */ 565138568Ssam return rs->rs_rates[rs->rs_nrates-1] & IEEE80211_RATE_VAL; 566138568Ssam} 567138568Ssam 568116742Ssam/* 569138568Ssam * Compare the capabilities of two nodes and decide which is 570138568Ssam * more desirable (return >0 if a is considered better). Note 571138568Ssam * that we assume compatibility/usability has already been checked 572138568Ssam * so we don't need to (e.g. validate whether privacy is supported). 573138568Ssam * Used to select the best scan candidate for association in a BSS. 574138568Ssam */ 575138568Ssamstatic int 576138568Ssamieee80211_node_compare(struct ieee80211com *ic, 577138568Ssam const struct ieee80211_node *a, 578138568Ssam const struct ieee80211_node *b) 579138568Ssam{ 580138568Ssam u_int8_t maxa, maxb; 581138568Ssam u_int8_t rssia, rssib; 582148432Ssam int weight; 583138568Ssam 584138568Ssam /* privacy support preferred */ 585138568Ssam if ((a->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) && 586138568Ssam (b->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 587138568Ssam return 1; 588138568Ssam if ((a->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0 && 589138568Ssam (b->ni_capinfo & IEEE80211_CAPINFO_PRIVACY)) 590138568Ssam return -1; 591138568Ssam 592148432Ssam /* compare count of previous failures */ 593148432Ssam weight = b->ni_fails - a->ni_fails; 594148432Ssam if (abs(weight) > 1) 595148432Ssam return weight; 596148432Ssam 597138568Ssam rssia = ic->ic_node_getrssi(a); 598138568Ssam rssib = ic->ic_node_getrssi(b); 599139543Ssam if (abs(rssib - rssia) < 5) { 600139543Ssam /* best/max rate preferred if signal level close enough XXX */ 601139543Ssam maxa = maxrate(a); 602139543Ssam maxb = maxrate(b); 603139543Ssam if (maxa != maxb) 604139543Ssam return maxa - maxb; 605139543Ssam /* XXX use freq for channel preference */ 606139543Ssam /* for now just prefer 5Ghz band to all other bands */ 607139543Ssam if (IEEE80211_IS_CHAN_5GHZ(a->ni_chan) && 608139543Ssam !IEEE80211_IS_CHAN_5GHZ(b->ni_chan)) 609139543Ssam return 1; 610139543Ssam if (!IEEE80211_IS_CHAN_5GHZ(a->ni_chan) && 611139543Ssam IEEE80211_IS_CHAN_5GHZ(b->ni_chan)) 612139543Ssam return -1; 613139543Ssam } 614138568Ssam /* all things being equal, use signal level */ 615138568Ssam return rssia - rssib; 616138568Ssam} 617138568Ssam 618138568Ssam/* 619140441Ssam * Mark an ongoing scan stopped. 620140441Ssam */ 621140441Ssamvoid 622140441Ssamieee80211_cancel_scan(struct ieee80211com *ic) 623140441Ssam{ 624140441Ssam 625140441Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, "%s: end %s scan\n", 626140441Ssam __func__, 627140441Ssam (ic->ic_flags & IEEE80211_F_ASCAN) ? "active" : "passive"); 628140441Ssam 629140441Ssam ic->ic_flags &= ~(IEEE80211_F_SCAN | IEEE80211_F_ASCAN); 630156358Ssam ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN; 631140441Ssam} 632140441Ssam 633140441Ssam/* 634116742Ssam * Complete a scan of potential channels. 635116742Ssam */ 636116742Ssamvoid 637138568Ssamieee80211_end_scan(struct ieee80211com *ic) 638116742Ssam{ 639140448Ssam struct ieee80211_node_table *nt = &ic->ic_scan; 640140448Ssam struct ieee80211_node *ni, *selbs; 641116742Ssam 642140441Ssam ieee80211_cancel_scan(ic); 643140441Ssam ieee80211_notify_scan_done(ic); 644116742Ssam 645116742Ssam if (ic->ic_opmode == IEEE80211_M_HOSTAP) { 646138568Ssam u_int8_t maxrssi[IEEE80211_CHAN_MAX]; /* XXX off stack? */ 647138568Ssam int i, bestchan; 648138568Ssam u_int8_t rssi; 649138568Ssam 650116742Ssam /* 651116742Ssam * The passive scan to look for existing AP's completed, 652116742Ssam * select a channel to camp on. Identify the channels 653116742Ssam * that already have one or more AP's and try to locate 654140753Ssam * an unoccupied one. If that fails, pick a channel that 655138568Ssam * looks to be quietest. 656116742Ssam */ 657138568Ssam memset(maxrssi, 0, sizeof(maxrssi)); 658140448Ssam IEEE80211_NODE_LOCK(nt); 659140448Ssam TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 660138568Ssam rssi = ic->ic_node_getrssi(ni); 661138568Ssam i = ieee80211_chan2ieee(ic, ni->ni_chan); 662138568Ssam if (rssi > maxrssi[i]) 663138568Ssam maxrssi[i] = rssi; 664116742Ssam } 665140448Ssam IEEE80211_NODE_UNLOCK(nt); 666138568Ssam /* XXX select channel more intelligently */ 667138568Ssam bestchan = -1; 668116742Ssam for (i = 0; i < IEEE80211_CHAN_MAX; i++) 669138568Ssam if (isset(ic->ic_chan_active, i)) { 670138568Ssam /* 671138568Ssam * If the channel is unoccupied the max rssi 672138568Ssam * should be zero; just take it. Otherwise 673138568Ssam * track the channel with the lowest rssi and 674138568Ssam * use that when all channels appear occupied. 675138568Ssam */ 676138568Ssam if (maxrssi[i] == 0) { 677138568Ssam bestchan = i; 678116742Ssam break; 679138568Ssam } 680143715Ssam if (bestchan == -1 || 681143715Ssam maxrssi[i] < maxrssi[bestchan]) 682138568Ssam bestchan = i; 683138568Ssam } 684138568Ssam if (bestchan != -1) { 685138568Ssam ieee80211_create_ibss(ic, &ic->ic_channels[bestchan]); 686138568Ssam return; 687116742Ssam } 688138568Ssam /* no suitable channel, should not happen */ 689138568Ssam } 690138568Ssam 691138568Ssam /* 692138568Ssam * When manually sequencing the state machine; scan just once 693138568Ssam * regardless of whether we have a candidate or not. The 694138568Ssam * controlling application is expected to setup state and 695138568Ssam * initiate an association. 696138568Ssam */ 697138568Ssam if (ic->ic_roaming == IEEE80211_ROAMING_MANUAL) 698116742Ssam return; 699138568Ssam /* 700138568Ssam * Automatic sequencing; look for a candidate and 701138568Ssam * if found join the network. 702138568Ssam */ 703140448Ssam /* NB: unlocked read should be ok */ 704140448Ssam if (TAILQ_FIRST(&nt->nt_node) == NULL) { 705138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, 706138568Ssam "%s: no scan candidate\n", __func__); 707116742Ssam notfound: 708116742Ssam if (ic->ic_opmode == IEEE80211_M_IBSS && 709116742Ssam (ic->ic_flags & IEEE80211_F_IBSSON) && 710116742Ssam ic->ic_des_esslen != 0) { 711116742Ssam ieee80211_create_ibss(ic, ic->ic_ibss_chan); 712116742Ssam return; 713116742Ssam } 714116742Ssam /* 715148432Ssam * Decrement the failure counts so entries will be 716148432Ssam * reconsidered the next time around. We really want 717148432Ssam * to do this only for sta's where we've previously 718153352Ssam * had some success. 719148432Ssam */ 720148432Ssam IEEE80211_NODE_LOCK(nt); 721148432Ssam TAILQ_FOREACH(ni, &nt->nt_node, ni_list) 722148432Ssam if (ni->ni_fails) 723148432Ssam ni->ni_fails--; 724148432Ssam IEEE80211_NODE_UNLOCK(nt); 725148432Ssam /* 726116742Ssam * Reset the list of channels to scan and start again. 727116742Ssam */ 728138568Ssam ieee80211_reset_scan(ic); 729138568Ssam ic->ic_flags |= IEEE80211_F_SCAN; 730138568Ssam ieee80211_next_scan(ic); 731116742Ssam return; 732116742Ssam } 733116742Ssam selbs = NULL; 734138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, "\t%s\n", 735138568Ssam "macaddr bssid chan rssi rate flag wep essid"); 736140448Ssam IEEE80211_NODE_LOCK(nt); 737140448Ssam TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 738138568Ssam if (ieee80211_match_bss(ic, ni) == 0) { 739116742Ssam if (selbs == NULL) 740116742Ssam selbs = ni; 741140448Ssam else if (ieee80211_node_compare(ic, ni, selbs) > 0) 742116742Ssam selbs = ni; 743116742Ssam } 744116742Ssam } 745140448Ssam if (selbs != NULL) /* NB: grab ref while dropping lock */ 746140448Ssam (void) ieee80211_ref_node(selbs); 747140448Ssam IEEE80211_NODE_UNLOCK(nt); 748116742Ssam if (selbs == NULL) 749116742Ssam goto notfound; 750138568Ssam if (!ieee80211_sta_join(ic, selbs)) { 751140448Ssam ieee80211_free_node(selbs); 752138568Ssam goto notfound; 753138568Ssam } 754138568Ssam} 755138568Ssam 756138568Ssam/* 757138568Ssam * Handle 802.11 ad hoc network merge. The 758138568Ssam * convention, set by the Wireless Ethernet Compatibility Alliance 759138568Ssam * (WECA), is that an 802.11 station will change its BSSID to match 760138568Ssam * the "oldest" 802.11 ad hoc network, on the same channel, that 761138568Ssam * has the station's desired SSID. The "oldest" 802.11 network 762138568Ssam * sends beacons with the greatest TSF timestamp. 763138568Ssam * 764138568Ssam * The caller is assumed to validate TSF's before attempting a merge. 765138568Ssam * 766138568Ssam * Return !0 if the BSSID changed, 0 otherwise. 767138568Ssam */ 768138568Ssamint 769148306Ssamieee80211_ibss_merge(struct ieee80211_node *ni) 770138568Ssam{ 771148306Ssam struct ieee80211com *ic = ni->ni_ic; 772138568Ssam 773140453Ssam if (ni == ic->ic_bss || 774140453Ssam IEEE80211_ADDR_EQ(ni->ni_bssid, ic->ic_bss->ni_bssid)) { 775138568Ssam /* unchanged, nothing to do */ 776138568Ssam return 0; 777138568Ssam } 778138568Ssam if (ieee80211_match_bss(ic, ni) != 0) { /* capabilities mismatch */ 779138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 780138568Ssam "%s: merge failed, capabilities mismatch\n", __func__); 781138568Ssam ic->ic_stats.is_ibss_capmismatch++; 782138568Ssam return 0; 783138568Ssam } 784138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 785138568Ssam "%s: new bssid %s: %s preamble, %s slot time%s\n", __func__, 786138568Ssam ether_sprintf(ni->ni_bssid), 787138568Ssam ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long", 788138568Ssam ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long", 789138568Ssam ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : "" 790138568Ssam ); 791140753Ssam return ieee80211_sta_join(ic, ieee80211_ref_node(ni)); 792138568Ssam} 793138568Ssam 794138568Ssam/* 795138568Ssam * Join the specified IBSS/BSS network. The node is assumed to 796138568Ssam * be passed in with a held reference. 797138568Ssam */ 798138568Ssamint 799138568Ssamieee80211_sta_join(struct ieee80211com *ic, struct ieee80211_node *selbs) 800138568Ssam{ 801138568Ssam struct ieee80211_node *obss; 802138568Ssam 803116742Ssam if (ic->ic_opmode == IEEE80211_M_IBSS) { 804140753Ssam struct ieee80211_node_table *nt; 805138568Ssam /* 806140440Ssam * Delete unusable rates; we've already checked 807140440Ssam * that the negotiated rate set is acceptable. 808138568Ssam */ 809148299Ssam ieee80211_fix_rate(selbs, IEEE80211_F_DODEL); 810127772Ssam /* 811140753Ssam * Fillin the neighbor table; it will already 812139521Ssam * exist if we are simply switching mastership. 813140753Ssam * XXX ic_sta always setup so this is unnecessary? 814127772Ssam */ 815140753Ssam nt = &ic->ic_sta; 816140753Ssam IEEE80211_NODE_LOCK(nt); 817140753Ssam nt->nt_name = "neighbor"; 818140753Ssam nt->nt_inact_init = ic->ic_inact_run; 819140753Ssam IEEE80211_NODE_UNLOCK(nt); 820138568Ssam } 821138568Ssam 822138568Ssam /* 823138568Ssam * Committed to selbs, setup state. 824138568Ssam */ 825138568Ssam obss = ic->ic_bss; 826140753Ssam ic->ic_bss = selbs; /* NB: caller assumed to bump refcnt */ 827153352Ssam if (obss != NULL) { 828153352Ssam copy_bss(selbs, obss); 829138568Ssam ieee80211_free_node(obss); 830153352Ssam } 831138568Ssam /* 832138568Ssam * Set the erp state (mostly the slot time) to deal with 833138568Ssam * the auto-select case; this should be redundant if the 834138568Ssam * mode is locked. 835138568Ssam */ 836138568Ssam ic->ic_curmode = ieee80211_chan2mode(ic, selbs->ni_chan); 837148936Ssam ic->ic_curchan = selbs->ni_chan; 838138568Ssam ieee80211_reset_erp(ic); 839138568Ssam ieee80211_wme_initparams(ic); 840140753Ssam 841140753Ssam if (ic->ic_opmode == IEEE80211_M_STA) 842140753Ssam ieee80211_new_state(ic, IEEE80211_S_AUTH, -1); 843140753Ssam else 844117811Ssam ieee80211_new_state(ic, IEEE80211_S_RUN, -1); 845138568Ssam return 1; 846116742Ssam} 847116742Ssam 848138568Ssam/* 849138568Ssam * Leave the specified IBSS/BSS network. The node is assumed to 850138568Ssam * be passed in with a held reference. 851138568Ssam */ 852138568Ssamvoid 853138568Ssamieee80211_sta_leave(struct ieee80211com *ic, struct ieee80211_node *ni) 854138568Ssam{ 855138568Ssam ic->ic_node_cleanup(ni); 856138568Ssam ieee80211_notify_node_leave(ic, ni); 857138568Ssam} 858138568Ssam 859116742Ssamstatic struct ieee80211_node * 860138568Ssamnode_alloc(struct ieee80211_node_table *nt) 861116742Ssam{ 862127768Ssam struct ieee80211_node *ni; 863138568Ssam 864127768Ssam MALLOC(ni, struct ieee80211_node *, sizeof(struct ieee80211_node), 865127768Ssam M_80211_NODE, M_NOWAIT | M_ZERO); 866127768Ssam return ni; 867116742Ssam} 868116742Ssam 869138568Ssam/* 870138568Ssam * Reclaim any resources in a node and reset any critical 871138568Ssam * state. Typically nodes are free'd immediately after, 872138568Ssam * but in some cases the storage may be reused so we need 873138568Ssam * to insure consistent state (should probably fix that). 874138568Ssam */ 875116742Ssamstatic void 876138568Ssamnode_cleanup(struct ieee80211_node *ni) 877116742Ssam{ 878138568Ssam#define N(a) (sizeof(a)/sizeof(a[0])) 879138568Ssam struct ieee80211com *ic = ni->ni_ic; 880138568Ssam int i, qlen; 881138568Ssam 882138568Ssam /* NB: preserve ni_table */ 883138568Ssam if (ni->ni_flags & IEEE80211_NODE_PWR_MGT) { 884138568Ssam ic->ic_ps_sta--; 885138568Ssam ni->ni_flags &= ~IEEE80211_NODE_PWR_MGT; 886138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_POWER, 887138568Ssam "[%s] power save mode off, %u sta's in ps mode\n", 888138568Ssam ether_sprintf(ni->ni_macaddr), ic->ic_ps_sta); 889138568Ssam } 890147788Ssam /* 891147788Ssam * Clear AREF flag that marks the authorization refcnt bump 892147788Ssam * has happened. This is probably not needed as the node 893147788Ssam * should always be removed from the table so not found but 894147788Ssam * do it just in case. 895147788Ssam */ 896147788Ssam ni->ni_flags &= ~IEEE80211_NODE_AREF; 897138568Ssam 898138568Ssam /* 899138568Ssam * Drain power save queue and, if needed, clear TIM. 900138568Ssam */ 901138568Ssam IEEE80211_NODE_SAVEQ_DRAIN(ni, qlen); 902138568Ssam if (qlen != 0 && ic->ic_set_tim != NULL) 903148304Ssam ic->ic_set_tim(ni, 0); 904138568Ssam 905138568Ssam ni->ni_associd = 0; 906138568Ssam if (ni->ni_challenge != NULL) { 907138568Ssam FREE(ni->ni_challenge, M_DEVBUF); 908138568Ssam ni->ni_challenge = NULL; 909138568Ssam } 910138568Ssam /* 911138568Ssam * Preserve SSID, WPA, and WME ie's so the bss node is 912138568Ssam * reusable during a re-auth/re-assoc state transition. 913138568Ssam * If we remove these data they will not be recreated 914138568Ssam * because they come from a probe-response or beacon frame 915138568Ssam * which cannot be expected prior to the association-response. 916138568Ssam * This should not be an issue when operating in other modes 917138568Ssam * as stations leaving always go through a full state transition 918138568Ssam * which will rebuild this state. 919138568Ssam * 920138568Ssam * XXX does this leave us open to inheriting old state? 921138568Ssam */ 922138568Ssam for (i = 0; i < N(ni->ni_rxfrag); i++) 923138568Ssam if (ni->ni_rxfrag[i] != NULL) { 924138568Ssam m_freem(ni->ni_rxfrag[i]); 925138568Ssam ni->ni_rxfrag[i] = NULL; 926138568Ssam } 927148863Ssam /* 928148863Ssam * Must be careful here to remove any key map entry w/o a LOR. 929148863Ssam */ 930148863Ssam ieee80211_node_delucastkey(ni); 931138568Ssam#undef N 932116742Ssam} 933116742Ssam 934116742Ssamstatic void 935138568Ssamnode_free(struct ieee80211_node *ni) 936116742Ssam{ 937138568Ssam struct ieee80211com *ic = ni->ni_ic; 938138568Ssam 939138568Ssam ic->ic_node_cleanup(ni); 940138568Ssam if (ni->ni_wpa_ie != NULL) 941138568Ssam FREE(ni->ni_wpa_ie, M_DEVBUF); 942138568Ssam if (ni->ni_wme_ie != NULL) 943138568Ssam FREE(ni->ni_wme_ie, M_DEVBUF); 944138568Ssam IEEE80211_NODE_SAVEQ_DESTROY(ni); 945138568Ssam FREE(ni, M_80211_NODE); 946116742Ssam} 947116742Ssam 948120104Ssamstatic u_int8_t 949138568Ssamnode_getrssi(const struct ieee80211_node *ni) 950120104Ssam{ 951120104Ssam return ni->ni_rssi; 952120104Ssam} 953120104Ssam 954116742Ssamstatic void 955138568Ssamieee80211_setup_node(struct ieee80211_node_table *nt, 956138568Ssam struct ieee80211_node *ni, const u_int8_t *macaddr) 957116742Ssam{ 958138568Ssam struct ieee80211com *ic = nt->nt_ic; 959116742Ssam int hash; 960116742Ssam 961138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 962140766Ssam "%s %p<%s> in %s table\n", __func__, ni, 963138568Ssam ether_sprintf(macaddr), nt->nt_name); 964138568Ssam 965116742Ssam IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 966116742Ssam hash = IEEE80211_NODE_HASH(macaddr); 967138568Ssam ieee80211_node_initref(ni); /* mark referenced */ 968138568Ssam ni->ni_chan = IEEE80211_CHAN_ANYC; 969138568Ssam ni->ni_authmode = IEEE80211_AUTH_OPEN; 970138568Ssam ni->ni_txpower = ic->ic_txpowlimit; /* max power */ 971138568Ssam ieee80211_crypto_resetkey(ic, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE); 972139528Ssam ni->ni_inact_reload = nt->nt_inact_init; 973139528Ssam ni->ni_inact = ni->ni_inact_reload; 974138568Ssam IEEE80211_NODE_SAVEQ_INIT(ni, "unknown"); 975138568Ssam 976138568Ssam IEEE80211_NODE_LOCK(nt); 977138568Ssam TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list); 978138568Ssam LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash); 979138568Ssam ni->ni_table = nt; 980138568Ssam ni->ni_ic = ic; 981138568Ssam IEEE80211_NODE_UNLOCK(nt); 982116742Ssam} 983116742Ssam 984116742Ssamstruct ieee80211_node * 985138568Ssamieee80211_alloc_node(struct ieee80211_node_table *nt, const u_int8_t *macaddr) 986116742Ssam{ 987138568Ssam struct ieee80211com *ic = nt->nt_ic; 988138568Ssam struct ieee80211_node *ni; 989138568Ssam 990138568Ssam ni = ic->ic_node_alloc(nt); 991116742Ssam if (ni != NULL) 992138568Ssam ieee80211_setup_node(nt, ni, macaddr); 993127769Ssam else 994127769Ssam ic->ic_stats.is_rx_nodealloc++; 995116742Ssam return ni; 996116742Ssam} 997116742Ssam 998148777Ssam/* 999148777Ssam * Craft a temporary node suitable for sending a management frame 1000148777Ssam * to the specified station. We craft only as much state as we 1001148777Ssam * need to do the work since the node will be immediately reclaimed 1002148777Ssam * once the send completes. 1003148777Ssam */ 1004116742Ssamstruct ieee80211_node * 1005148777Ssamieee80211_tmp_node(struct ieee80211com *ic, const u_int8_t *macaddr) 1006148777Ssam{ 1007148777Ssam struct ieee80211_node *ni; 1008148777Ssam 1009148777Ssam ni = ic->ic_node_alloc(&ic->ic_sta); 1010148777Ssam if (ni != NULL) { 1011148777Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1012148777Ssam "%s %p<%s>\n", __func__, ni, ether_sprintf(macaddr)); 1013148777Ssam 1014148777Ssam IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1015148777Ssam IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_bss->ni_bssid); 1016148777Ssam ieee80211_node_initref(ni); /* mark referenced */ 1017148777Ssam ni->ni_txpower = ic->ic_bss->ni_txpower; 1018148777Ssam /* NB: required by ieee80211_fix_rate */ 1019148777Ssam ieee80211_set_chan(ic, ni, ic->ic_bss->ni_chan); 1020148777Ssam ieee80211_crypto_resetkey(ic, &ni->ni_ucastkey, 1021148777Ssam IEEE80211_KEYIX_NONE); 1022148777Ssam /* XXX optimize away */ 1023148777Ssam IEEE80211_NODE_SAVEQ_INIT(ni, "unknown"); 1024148777Ssam 1025148777Ssam ni->ni_table = NULL; /* NB: pedantic */ 1026148777Ssam ni->ni_ic = ic; 1027148777Ssam } else { 1028148777Ssam /* XXX msg */ 1029148777Ssam ic->ic_stats.is_rx_nodealloc++; 1030148777Ssam } 1031148777Ssam return ni; 1032148777Ssam} 1033148777Ssam 1034148777Ssamstruct ieee80211_node * 1035138568Ssamieee80211_dup_bss(struct ieee80211_node_table *nt, const u_int8_t *macaddr) 1036116742Ssam{ 1037138568Ssam struct ieee80211com *ic = nt->nt_ic; 1038138568Ssam struct ieee80211_node *ni; 1039138568Ssam 1040138568Ssam ni = ic->ic_node_alloc(nt); 1041116742Ssam if (ni != NULL) { 1042138568Ssam ieee80211_setup_node(nt, ni, macaddr); 1043127770Ssam /* 1044127770Ssam * Inherit from ic_bss. 1045127770Ssam */ 1046138568Ssam ni->ni_authmode = ic->ic_bss->ni_authmode; 1047138568Ssam ni->ni_txpower = ic->ic_bss->ni_txpower; 1048138568Ssam ni->ni_vlan = ic->ic_bss->ni_vlan; /* XXX?? */ 1049127770Ssam IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_bss->ni_bssid); 1050138568Ssam ieee80211_set_chan(ic, ni, ic->ic_bss->ni_chan); 1051138568Ssam ni->ni_rsn = ic->ic_bss->ni_rsn; 1052127770Ssam } else 1053127770Ssam ic->ic_stats.is_rx_nodealloc++; 1054116742Ssam return ni; 1055116742Ssam} 1056116742Ssam 1057127772Ssamstatic struct ieee80211_node * 1058138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1059138568Ssam_ieee80211_find_node_debug(struct ieee80211_node_table *nt, 1060138568Ssam const u_int8_t *macaddr, const char *func, int line) 1061138568Ssam#else 1062138568Ssam_ieee80211_find_node(struct ieee80211_node_table *nt, 1063138568Ssam const u_int8_t *macaddr) 1064138568Ssam#endif 1065116742Ssam{ 1066116742Ssam struct ieee80211_node *ni; 1067116742Ssam int hash; 1068116742Ssam 1069138568Ssam IEEE80211_NODE_LOCK_ASSERT(nt); 1070127772Ssam 1071116742Ssam hash = IEEE80211_NODE_HASH(macaddr); 1072138568Ssam LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1073116742Ssam if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1074138568Ssam ieee80211_ref_node(ni); /* mark referenced */ 1075138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1076138568Ssam IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE, 1077140766Ssam "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1078140766Ssam func, line, 1079140766Ssam ni, ether_sprintf(ni->ni_macaddr), 1080140766Ssam ieee80211_node_refcnt(ni)); 1081138568Ssam#endif 1082127772Ssam return ni; 1083116742Ssam } 1084116742Ssam } 1085127772Ssam return NULL; 1086127772Ssam} 1087138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1088138568Ssam#define _ieee80211_find_node(nt, mac) \ 1089138568Ssam _ieee80211_find_node_debug(nt, mac, func, line) 1090138568Ssam#endif 1091127772Ssam 1092127772Ssamstruct ieee80211_node * 1093138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1094138568Ssamieee80211_find_node_debug(struct ieee80211_node_table *nt, 1095138568Ssam const u_int8_t *macaddr, const char *func, int line) 1096138568Ssam#else 1097138568Ssamieee80211_find_node(struct ieee80211_node_table *nt, const u_int8_t *macaddr) 1098138568Ssam#endif 1099127772Ssam{ 1100127772Ssam struct ieee80211_node *ni; 1101127772Ssam 1102138568Ssam IEEE80211_NODE_LOCK(nt); 1103138568Ssam ni = _ieee80211_find_node(nt, macaddr); 1104138568Ssam IEEE80211_NODE_UNLOCK(nt); 1105116742Ssam return ni; 1106116742Ssam} 1107116742Ssam 1108116742Ssam/* 1109138568Ssam * Fake up a node; this handles node discovery in adhoc mode. 1110138568Ssam * Note that for the driver's benefit we we treat this like 1111138568Ssam * an association so the driver has an opportunity to setup 1112138568Ssam * it's private state. 1113138568Ssam */ 1114138568Ssamstruct ieee80211_node * 1115138568Ssamieee80211_fakeup_adhoc_node(struct ieee80211_node_table *nt, 1116138568Ssam const u_int8_t macaddr[IEEE80211_ADDR_LEN]) 1117138568Ssam{ 1118138568Ssam struct ieee80211com *ic = nt->nt_ic; 1119138568Ssam struct ieee80211_node *ni; 1120138568Ssam 1121153073Ssam IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE, 1122153073Ssam "%s: mac<%s>\n", __func__, ether_sprintf(macaddr)); 1123138568Ssam ni = ieee80211_dup_bss(nt, macaddr); 1124138568Ssam if (ni != NULL) { 1125138568Ssam /* XXX no rate negotiation; just dup */ 1126138568Ssam ni->ni_rates = ic->ic_bss->ni_rates; 1127139524Ssam if (ic->ic_newassoc != NULL) 1128148307Ssam ic->ic_newassoc(ni, 1); 1129138568Ssam /* XXX not right for 802.1x/WPA */ 1130148302Ssam ieee80211_node_authorize(ni); 1131153404Ssam if (ic->ic_opmode == IEEE80211_M_AHDEMO) { 1132153404Ssam /* 1133153404Ssam * Blindly propagate capabilities based on the 1134153404Ssam * local configuration. In particular this permits 1135153404Ssam * us to use QoS to disable ACK's. 1136153404Ssam */ 1137153404Ssam if (ic->ic_flags & IEEE80211_F_WME) 1138153404Ssam ni->ni_flags |= IEEE80211_NODE_QOS; 1139153404Ssam } 1140138568Ssam } 1141138568Ssam return ni; 1142138568Ssam} 1143138568Ssam 1144148936Ssam#ifdef IEEE80211_DEBUG 1145148936Ssamstatic void 1146148936Ssamdump_probe_beacon(u_int8_t subtype, int isnew, 1147148936Ssam const u_int8_t mac[IEEE80211_ADDR_LEN], 1148148936Ssam const struct ieee80211_scanparams *sp) 1149148936Ssam{ 1150148936Ssam 1151148936Ssam printf("[%s] %s%s on chan %u (bss chan %u) ", 1152148936Ssam ether_sprintf(mac), isnew ? "new " : "", 1153148936Ssam ieee80211_mgt_subtype_name[subtype >> IEEE80211_FC0_SUBTYPE_SHIFT], 1154148936Ssam sp->chan, sp->bchan); 1155148936Ssam ieee80211_print_essid(sp->ssid + 2, sp->ssid[1]); 1156148936Ssam printf("\n"); 1157148936Ssam 1158148936Ssam if (isnew) { 1159148936Ssam printf("[%s] caps 0x%x bintval %u erp 0x%x", 1160148936Ssam ether_sprintf(mac), sp->capinfo, sp->bintval, sp->erp); 1161148936Ssam if (sp->country != NULL) { 1162148936Ssam#ifdef __FreeBSD__ 1163148936Ssam printf(" country info %*D", 1164148936Ssam sp->country[1], sp->country+2, " "); 1165148936Ssam#else 1166148936Ssam int i; 1167148936Ssam printf(" country info"); 1168148936Ssam for (i = 0; i < sp->country[1]; i++) 1169148936Ssam printf(" %02x", sp->country[i+2]); 1170148936Ssam#endif 1171148936Ssam } 1172148936Ssam printf("\n"); 1173148936Ssam } 1174148936Ssam} 1175148936Ssam#endif /* IEEE80211_DEBUG */ 1176148936Ssam 1177148936Ssamstatic void 1178148936Ssamsaveie(u_int8_t **iep, const u_int8_t *ie) 1179148936Ssam{ 1180148936Ssam 1181148936Ssam if (ie == NULL) 1182148936Ssam *iep = NULL; 1183148936Ssam else 1184148936Ssam ieee80211_saveie(iep, ie); 1185148936Ssam} 1186148936Ssam 1187148936Ssam/* 1188148936Ssam * Process a beacon or probe response frame. 1189148936Ssam */ 1190148936Ssamvoid 1191148936Ssamieee80211_add_scan(struct ieee80211com *ic, 1192148936Ssam const struct ieee80211_scanparams *sp, 1193148936Ssam const struct ieee80211_frame *wh, 1194148936Ssam int subtype, int rssi, int rstamp) 1195148936Ssam{ 1196148936Ssam#define ISPROBE(_st) ((_st) == IEEE80211_FC0_SUBTYPE_PROBE_RESP) 1197148936Ssam struct ieee80211_node_table *nt = &ic->ic_scan; 1198148936Ssam struct ieee80211_node *ni; 1199148936Ssam int newnode = 0; 1200148936Ssam 1201148936Ssam ni = ieee80211_find_node(nt, wh->i_addr2); 1202148936Ssam if (ni == NULL) { 1203148936Ssam /* 1204148936Ssam * Create a new entry. 1205148936Ssam */ 1206148936Ssam ni = ic->ic_node_alloc(nt); 1207148936Ssam if (ni == NULL) { 1208148936Ssam ic->ic_stats.is_rx_nodealloc++; 1209148936Ssam return; 1210148936Ssam } 1211148936Ssam ieee80211_setup_node(nt, ni, wh->i_addr2); 1212148936Ssam /* 1213148936Ssam * XXX inherit from ic_bss. 1214148936Ssam */ 1215148936Ssam ni->ni_authmode = ic->ic_bss->ni_authmode; 1216148936Ssam ni->ni_txpower = ic->ic_bss->ni_txpower; 1217148936Ssam ni->ni_vlan = ic->ic_bss->ni_vlan; /* XXX?? */ 1218148936Ssam ieee80211_set_chan(ic, ni, ic->ic_curchan); 1219148936Ssam ni->ni_rsn = ic->ic_bss->ni_rsn; 1220148936Ssam newnode = 1; 1221148936Ssam } 1222148936Ssam#ifdef IEEE80211_DEBUG 1223148936Ssam if (ieee80211_msg_scan(ic) && (ic->ic_flags & IEEE80211_F_SCAN)) 1224148936Ssam dump_probe_beacon(subtype, newnode, wh->i_addr2, sp); 1225148936Ssam#endif 1226148936Ssam /* XXX ap beaconing multiple ssid w/ same bssid */ 1227148936Ssam if (sp->ssid[1] != 0 && 1228148936Ssam (ISPROBE(subtype) || ni->ni_esslen == 0)) { 1229148936Ssam ni->ni_esslen = sp->ssid[1]; 1230148936Ssam memset(ni->ni_essid, 0, sizeof(ni->ni_essid)); 1231148936Ssam memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]); 1232148936Ssam } 1233148936Ssam ni->ni_scangen = ic->ic_scan.nt_scangen; 1234148936Ssam IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3); 1235148936Ssam ni->ni_rssi = rssi; 1236148936Ssam ni->ni_rstamp = rstamp; 1237148936Ssam memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp)); 1238148936Ssam ni->ni_intval = sp->bintval; 1239148936Ssam ni->ni_capinfo = sp->capinfo; 1240148936Ssam ni->ni_chan = &ic->ic_channels[sp->chan]; 1241148936Ssam ni->ni_fhdwell = sp->fhdwell; 1242148936Ssam ni->ni_fhindex = sp->fhindex; 1243148936Ssam ni->ni_erp = sp->erp; 1244148936Ssam if (sp->tim != NULL) { 1245148936Ssam struct ieee80211_tim_ie *ie = 1246148936Ssam (struct ieee80211_tim_ie *) sp->tim; 1247148936Ssam 1248148936Ssam ni->ni_dtim_count = ie->tim_count; 1249148936Ssam ni->ni_dtim_period = ie->tim_period; 1250148936Ssam } 1251148936Ssam /* 1252148936Ssam * Record the byte offset from the mac header to 1253148936Ssam * the start of the TIM information element for 1254148936Ssam * use by hardware and/or to speedup software 1255148936Ssam * processing of beacon frames. 1256148936Ssam */ 1257148936Ssam ni->ni_timoff = sp->timoff; 1258148936Ssam /* 1259148936Ssam * Record optional information elements that might be 1260148936Ssam * used by applications or drivers. 1261148936Ssam */ 1262148936Ssam saveie(&ni->ni_wme_ie, sp->wme); 1263148936Ssam saveie(&ni->ni_wpa_ie, sp->wpa); 1264148936Ssam 1265148936Ssam /* NB: must be after ni_chan is setup */ 1266148936Ssam ieee80211_setup_rates(ni, sp->rates, sp->xrates, IEEE80211_F_DOSORT); 1267148936Ssam 1268148936Ssam if (!newnode) 1269148936Ssam ieee80211_free_node(ni); 1270148936Ssam#undef ISPROBE 1271148936Ssam} 1272148936Ssam 1273153073Ssamvoid 1274153073Ssamieee80211_init_neighbor(struct ieee80211_node *ni, 1275153073Ssam const struct ieee80211_frame *wh, 1276153073Ssam const struct ieee80211_scanparams *sp) 1277153073Ssam{ 1278153073Ssam 1279153073Ssam IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE, 1280153073Ssam "%s: %p<%s>\n", __func__, ni, ether_sprintf(ni->ni_macaddr)); 1281153073Ssam ni->ni_esslen = sp->ssid[1]; 1282153073Ssam memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]); 1283153073Ssam IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3); 1284153073Ssam memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp)); 1285153073Ssam ni->ni_intval = sp->bintval; 1286153073Ssam ni->ni_capinfo = sp->capinfo; 1287153073Ssam ni->ni_chan = ni->ni_ic->ic_curchan; 1288153073Ssam ni->ni_fhdwell = sp->fhdwell; 1289153073Ssam ni->ni_fhindex = sp->fhindex; 1290153073Ssam ni->ni_erp = sp->erp; 1291153073Ssam ni->ni_timoff = sp->timoff; 1292153073Ssam if (sp->wme != NULL) 1293153073Ssam ieee80211_saveie(&ni->ni_wme_ie, sp->wme); 1294153073Ssam if (sp->wpa != NULL) 1295153073Ssam ieee80211_saveie(&ni->ni_wpa_ie, sp->wpa); 1296153073Ssam 1297153073Ssam /* NB: must be after ni_chan is setup */ 1298153073Ssam ieee80211_setup_rates(ni, sp->rates, sp->xrates, IEEE80211_F_DOSORT); 1299153073Ssam} 1300153073Ssam 1301148936Ssam/* 1302148936Ssam * Do node discovery in adhoc mode on receipt of a beacon 1303148936Ssam * or probe response frame. Note that for the driver's 1304148936Ssam * benefit we we treat this like an association so the 1305148936Ssam * driver has an opportunity to setup it's private state. 1306148936Ssam */ 1307148936Ssamstruct ieee80211_node * 1308148936Ssamieee80211_add_neighbor(struct ieee80211com *ic, 1309148936Ssam const struct ieee80211_frame *wh, 1310148936Ssam const struct ieee80211_scanparams *sp) 1311148936Ssam{ 1312148936Ssam struct ieee80211_node *ni; 1313148936Ssam 1314153073Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1315153073Ssam "%s: mac<%s>\n", __func__, ether_sprintf(wh->i_addr2)); 1316148936Ssam ni = ieee80211_dup_bss(&ic->ic_sta, wh->i_addr2);/* XXX alloc_node? */ 1317148936Ssam if (ni != NULL) { 1318153073Ssam ieee80211_init_neighbor(ni, wh, sp); 1319148936Ssam if (ic->ic_newassoc != NULL) 1320148936Ssam ic->ic_newassoc(ni, 1); 1321148936Ssam /* XXX not right for 802.1x/WPA */ 1322148936Ssam ieee80211_node_authorize(ni); 1323148936Ssam } 1324148936Ssam return ni; 1325148936Ssam} 1326148936Ssam 1327148863Ssam#define IS_CTL(wh) \ 1328148863Ssam ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) == IEEE80211_FC0_TYPE_CTL) 1329148863Ssam#define IS_PSPOLL(wh) \ 1330148863Ssam ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == IEEE80211_FC0_SUBTYPE_PS_POLL) 1331138568Ssam/* 1332138568Ssam * Locate the node for sender, track state, and then pass the 1333138568Ssam * (referenced) node up to the 802.11 layer for its use. We 1334138568Ssam * are required to pass some node so we fall back to ic_bss 1335138568Ssam * when this frame is from an unknown sender. The 802.11 layer 1336138568Ssam * knows this means the sender wasn't in the node table and 1337138568Ssam * acts accordingly. 1338138568Ssam */ 1339138568Ssamstruct ieee80211_node * 1340138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1341138568Ssamieee80211_find_rxnode_debug(struct ieee80211com *ic, 1342138568Ssam const struct ieee80211_frame_min *wh, const char *func, int line) 1343138568Ssam#else 1344138568Ssamieee80211_find_rxnode(struct ieee80211com *ic, 1345138568Ssam const struct ieee80211_frame_min *wh) 1346138568Ssam#endif 1347138568Ssam{ 1348138568Ssam struct ieee80211_node_table *nt; 1349138568Ssam struct ieee80211_node *ni; 1350138568Ssam 1351138568Ssam /* XXX may want scanned nodes in the neighbor table for adhoc */ 1352138568Ssam if (ic->ic_opmode == IEEE80211_M_STA || 1353138568Ssam ic->ic_opmode == IEEE80211_M_MONITOR || 1354138568Ssam (ic->ic_flags & IEEE80211_F_SCAN)) 1355138568Ssam nt = &ic->ic_scan; 1356138568Ssam else 1357140753Ssam nt = &ic->ic_sta; 1358138568Ssam /* XXX check ic_bss first in station mode */ 1359138568Ssam /* XXX 4-address frames? */ 1360138568Ssam IEEE80211_NODE_LOCK(nt); 1361138568Ssam if (IS_CTL(wh) && !IS_PSPOLL(wh) /*&& !IS_RTS(ah)*/) 1362138568Ssam ni = _ieee80211_find_node(nt, wh->i_addr1); 1363138568Ssam else 1364138568Ssam ni = _ieee80211_find_node(nt, wh->i_addr2); 1365148863Ssam if (ni == NULL) 1366148863Ssam ni = ieee80211_ref_node(ic->ic_bss); 1367138568Ssam IEEE80211_NODE_UNLOCK(nt); 1368138568Ssam 1369148863Ssam return ni; 1370148863Ssam} 1371148863Ssam 1372148863Ssam/* 1373148863Ssam * Like ieee80211_find_rxnode but use the supplied h/w 1374148863Ssam * key index as a hint to locate the node in the key 1375148863Ssam * mapping table. If an entry is present at the key 1376148863Ssam * index we return it; otherwise do a normal lookup and 1377148863Ssam * update the mapping table if the station has a unicast 1378148863Ssam * key assigned to it. 1379148863Ssam */ 1380148863Ssamstruct ieee80211_node * 1381148863Ssam#ifdef IEEE80211_DEBUG_REFCNT 1382148863Ssamieee80211_find_rxnode_withkey_debug(struct ieee80211com *ic, 1383148863Ssam const struct ieee80211_frame_min *wh, ieee80211_keyix keyix, 1384148863Ssam const char *func, int line) 1385148863Ssam#else 1386148863Ssamieee80211_find_rxnode_withkey(struct ieee80211com *ic, 1387148863Ssam const struct ieee80211_frame_min *wh, ieee80211_keyix keyix) 1388148863Ssam#endif 1389148863Ssam{ 1390148863Ssam struct ieee80211_node_table *nt; 1391148863Ssam struct ieee80211_node *ni; 1392148863Ssam 1393148863Ssam if (ic->ic_opmode == IEEE80211_M_STA || 1394148863Ssam ic->ic_opmode == IEEE80211_M_MONITOR || 1395148863Ssam (ic->ic_flags & IEEE80211_F_SCAN)) 1396148863Ssam nt = &ic->ic_scan; 1397148863Ssam else 1398148863Ssam nt = &ic->ic_sta; 1399148863Ssam IEEE80211_NODE_LOCK(nt); 1400148863Ssam if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) 1401148863Ssam ni = nt->nt_keyixmap[keyix]; 1402148863Ssam else 1403148863Ssam ni = NULL; 1404148863Ssam if (ni == NULL) { 1405148863Ssam if (IS_CTL(wh) && !IS_PSPOLL(wh) /*&& !IS_RTS(ah)*/) 1406148863Ssam ni = _ieee80211_find_node(nt, wh->i_addr1); 1407148863Ssam else 1408148863Ssam ni = _ieee80211_find_node(nt, wh->i_addr2); 1409148863Ssam if (ni == NULL) 1410148863Ssam ni = ieee80211_ref_node(ic->ic_bss); 1411148863Ssam if (nt->nt_keyixmap != NULL) { 1412148863Ssam /* 1413148863Ssam * If the station has a unicast key cache slot 1414148863Ssam * assigned update the key->node mapping table. 1415148863Ssam */ 1416148863Ssam keyix = ni->ni_ucastkey.wk_rxkeyix; 1417148863Ssam /* XXX can keyixmap[keyix] != NULL? */ 1418148863Ssam if (keyix < nt->nt_keyixmax && 1419148863Ssam nt->nt_keyixmap[keyix] == NULL) { 1420148863Ssam IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE, 1421148863Ssam "%s: add key map entry %p<%s> refcnt %d\n", 1422148863Ssam __func__, ni, ether_sprintf(ni->ni_macaddr), 1423148863Ssam ieee80211_node_refcnt(ni)+1); 1424148863Ssam nt->nt_keyixmap[keyix] = ieee80211_ref_node(ni); 1425148863Ssam } 1426148863Ssam } 1427148863Ssam } else { 1428148863Ssam ieee80211_ref_node(ni); 1429148863Ssam } 1430148863Ssam IEEE80211_NODE_UNLOCK(nt); 1431148863Ssam 1432148863Ssam return ni; 1433148863Ssam} 1434138568Ssam#undef IS_PSPOLL 1435138568Ssam#undef IS_CTL 1436138568Ssam 1437138568Ssam/* 1438127772Ssam * Return a reference to the appropriate node for sending 1439127772Ssam * a data frame. This handles node discovery in adhoc networks. 1440127772Ssam */ 1441127772Ssamstruct ieee80211_node * 1442138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1443138568Ssamieee80211_find_txnode_debug(struct ieee80211com *ic, const u_int8_t *macaddr, 1444138568Ssam const char *func, int line) 1445138568Ssam#else 1446138568Ssamieee80211_find_txnode(struct ieee80211com *ic, const u_int8_t *macaddr) 1447138568Ssam#endif 1448127772Ssam{ 1449140753Ssam struct ieee80211_node_table *nt = &ic->ic_sta; 1450127772Ssam struct ieee80211_node *ni; 1451127772Ssam 1452127772Ssam /* 1453127772Ssam * The destination address should be in the node table 1454148863Ssam * unless this is a multicast/broadcast frame. We can 1455148863Ssam * also optimize station mode operation, all frames go 1456148863Ssam * to the bss node. 1457127772Ssam */ 1458127772Ssam /* XXX can't hold lock across dup_bss 'cuz of recursive locking */ 1459138568Ssam IEEE80211_NODE_LOCK(nt); 1460148863Ssam if (ic->ic_opmode == IEEE80211_M_STA || IEEE80211_IS_MULTICAST(macaddr)) 1461148863Ssam ni = ieee80211_ref_node(ic->ic_bss); 1462158121Ssam else { 1463148863Ssam ni = _ieee80211_find_node(nt, macaddr); 1464158121Ssam if (ic->ic_opmode == IEEE80211_M_HOSTAP && 1465158121Ssam (ni != NULL && ni->ni_associd == 0)) { 1466158121Ssam /* 1467158121Ssam * Station is not associated; don't permit the 1468158121Ssam * data frame to be sent by returning NULL. This 1469158121Ssam * is kinda a kludge but the least intrusive way 1470158121Ssam * to add this check into all drivers. 1471158121Ssam */ 1472158121Ssam ieee80211_unref_node(&ni); /* NB: null's ni */ 1473158121Ssam } 1474158121Ssam } 1475138568Ssam IEEE80211_NODE_UNLOCK(nt); 1476138568Ssam 1477138568Ssam if (ni == NULL) { 1478138568Ssam if (ic->ic_opmode == IEEE80211_M_IBSS || 1479140497Ssam ic->ic_opmode == IEEE80211_M_AHDEMO) { 1480140497Ssam /* 1481140497Ssam * In adhoc mode cons up a node for the destination. 1482140497Ssam * Note that we need an additional reference for the 1483140497Ssam * caller to be consistent with _ieee80211_find_node. 1484140497Ssam */ 1485138568Ssam ni = ieee80211_fakeup_adhoc_node(nt, macaddr); 1486140497Ssam if (ni != NULL) 1487140497Ssam (void) ieee80211_ref_node(ni); 1488140497Ssam } else { 1489138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_OUTPUT, 1490138568Ssam "[%s] no node, discard frame (%s)\n", 1491138568Ssam ether_sprintf(macaddr), __func__); 1492138568Ssam ic->ic_stats.is_tx_nonode++; 1493127772Ssam } 1494127772Ssam } 1495127772Ssam return ni; 1496127772Ssam} 1497127772Ssam 1498127772Ssam/* 1499116742Ssam * Like find but search based on the channel too. 1500116742Ssam */ 1501116742Ssamstruct ieee80211_node * 1502138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1503138568Ssamieee80211_find_node_with_channel_debug(struct ieee80211_node_table *nt, 1504138568Ssam const u_int8_t *macaddr, struct ieee80211_channel *chan, 1505138568Ssam const char *func, int line) 1506138568Ssam#else 1507138568Ssamieee80211_find_node_with_channel(struct ieee80211_node_table *nt, 1508138568Ssam const u_int8_t *macaddr, struct ieee80211_channel *chan) 1509138568Ssam#endif 1510116742Ssam{ 1511116742Ssam struct ieee80211_node *ni; 1512116742Ssam int hash; 1513116742Ssam 1514116742Ssam hash = IEEE80211_NODE_HASH(macaddr); 1515138568Ssam IEEE80211_NODE_LOCK(nt); 1516138568Ssam LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1517127772Ssam if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr) && 1518127772Ssam ni->ni_chan == chan) { 1519138568Ssam ieee80211_ref_node(ni); /* mark referenced */ 1520138568Ssam IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE, 1521159139Sdds REFCNT_LOC, ni, ether_sprintf(ni->ni_macaddr), 1522140766Ssam ieee80211_node_refcnt(ni)); 1523116742Ssam break; 1524116742Ssam } 1525116742Ssam } 1526138568Ssam IEEE80211_NODE_UNLOCK(nt); 1527116742Ssam return ni; 1528116742Ssam} 1529116742Ssam 1530138568Ssam/* 1531138568Ssam * Like find but search based on the ssid too. 1532138568Ssam */ 1533138568Ssamstruct ieee80211_node * 1534138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1535138568Ssamieee80211_find_node_with_ssid_debug(struct ieee80211_node_table *nt, 1536138568Ssam const u_int8_t *macaddr, u_int ssidlen, const u_int8_t *ssid, 1537138568Ssam const char *func, int line) 1538138568Ssam#else 1539138568Ssamieee80211_find_node_with_ssid(struct ieee80211_node_table *nt, 1540138568Ssam const u_int8_t *macaddr, u_int ssidlen, const u_int8_t *ssid) 1541138568Ssam#endif 1542138568Ssam{ 1543147118Ssam#define MATCH_SSID(ni, ssid, ssidlen) \ 1544147118Ssam (ni->ni_esslen == ssidlen && memcmp(ni->ni_essid, ssid, ssidlen) == 0) 1545147118Ssam static const u_int8_t zeromac[IEEE80211_ADDR_LEN]; 1546138568Ssam struct ieee80211com *ic = nt->nt_ic; 1547138568Ssam struct ieee80211_node *ni; 1548138568Ssam int hash; 1549138568Ssam 1550138568Ssam IEEE80211_NODE_LOCK(nt); 1551147118Ssam /* 1552147118Ssam * A mac address that is all zero means match only the ssid; 1553147118Ssam * otherwise we must match both. 1554147118Ssam */ 1555147118Ssam if (IEEE80211_ADDR_EQ(macaddr, zeromac)) { 1556147118Ssam TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 1557147118Ssam if (MATCH_SSID(ni, ssid, ssidlen)) 1558147118Ssam break; 1559147118Ssam } 1560147118Ssam } else { 1561147118Ssam hash = IEEE80211_NODE_HASH(macaddr); 1562147118Ssam LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1563147118Ssam if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr) && 1564147118Ssam MATCH_SSID(ni, ssid, ssidlen)) 1565147118Ssam break; 1566147118Ssam } 1567147118Ssam } 1568147118Ssam if (ni != NULL) { 1569147118Ssam ieee80211_ref_node(ni); /* mark referenced */ 1570147118Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1571159139Sdds REFCNT_LOC, ni, ether_sprintf(ni->ni_macaddr), 1572147118Ssam ieee80211_node_refcnt(ni)); 1573138568Ssam } 1574138568Ssam IEEE80211_NODE_UNLOCK(nt); 1575138568Ssam return ni; 1576147118Ssam#undef MATCH_SSID 1577138568Ssam} 1578138568Ssam 1579116742Ssamstatic void 1580138568Ssam_ieee80211_free_node(struct ieee80211_node *ni) 1581116742Ssam{ 1582138568Ssam struct ieee80211com *ic = ni->ni_ic; 1583138568Ssam struct ieee80211_node_table *nt = ni->ni_table; 1584119150Ssam 1585138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1586140766Ssam "%s %p<%s> in %s table\n", __func__, ni, 1587140766Ssam ether_sprintf(ni->ni_macaddr), 1588138568Ssam nt != NULL ? nt->nt_name : "<gone>"); 1589138568Ssam 1590138568Ssam IEEE80211_AID_CLR(ni->ni_associd, ic->ic_aid_bitmap); 1591138568Ssam if (nt != NULL) { 1592138568Ssam TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1593138568Ssam LIST_REMOVE(ni, ni_hash); 1594138568Ssam } 1595138568Ssam ic->ic_node_free(ni); 1596116742Ssam} 1597116742Ssam 1598116742Ssamvoid 1599138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1600138568Ssamieee80211_free_node_debug(struct ieee80211_node *ni, const char *func, int line) 1601138568Ssam#else 1602138568Ssamieee80211_free_node(struct ieee80211_node *ni) 1603138568Ssam#endif 1604116742Ssam{ 1605138568Ssam struct ieee80211_node_table *nt = ni->ni_table; 1606119150Ssam 1607138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1608140454Ssam IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE, 1609140766Ssam "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni, 1610138568Ssam ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1); 1611138568Ssam#endif 1612148863Ssam if (nt != NULL) { 1613148863Ssam IEEE80211_NODE_LOCK(nt); 1614148863Ssam if (ieee80211_node_dectestref(ni)) { 1615148863Ssam /* 1616148863Ssam * Last reference, reclaim state. 1617148863Ssam */ 1618138568Ssam _ieee80211_free_node(ni); 1619148863Ssam } else if (ieee80211_node_refcnt(ni) == 1 && 1620148863Ssam nt->nt_keyixmap != NULL) { 1621148863Ssam ieee80211_keyix keyix; 1622148863Ssam /* 1623148863Ssam * Check for a last reference in the key mapping table. 1624148863Ssam */ 1625148863Ssam keyix = ni->ni_ucastkey.wk_rxkeyix; 1626148863Ssam if (keyix < nt->nt_keyixmax && 1627148863Ssam nt->nt_keyixmap[keyix] == ni) { 1628148863Ssam IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE, 1629148863Ssam "%s: %p<%s> clear key map entry", __func__, 1630148863Ssam ni, ether_sprintf(ni->ni_macaddr)); 1631148863Ssam nt->nt_keyixmap[keyix] = NULL; 1632148863Ssam ieee80211_node_decref(ni); /* XXX needed? */ 1633148863Ssam _ieee80211_free_node(ni); 1634148863Ssam } 1635148863Ssam } 1636148863Ssam IEEE80211_NODE_UNLOCK(nt); 1637148863Ssam } else { 1638148863Ssam if (ieee80211_node_dectestref(ni)) 1639138568Ssam _ieee80211_free_node(ni); 1640116742Ssam } 1641116742Ssam} 1642116742Ssam 1643138568Ssam/* 1644148863Ssam * Reclaim a unicast key and clear any key cache state. 1645148863Ssam */ 1646148863Ssamint 1647148863Ssamieee80211_node_delucastkey(struct ieee80211_node *ni) 1648148863Ssam{ 1649148863Ssam struct ieee80211com *ic = ni->ni_ic; 1650148863Ssam struct ieee80211_node_table *nt = &ic->ic_sta; 1651148863Ssam struct ieee80211_node *nikey; 1652148863Ssam ieee80211_keyix keyix; 1653148863Ssam int isowned, status; 1654148863Ssam 1655148863Ssam /* 1656148863Ssam * NB: We must beware of LOR here; deleting the key 1657148863Ssam * can cause the crypto layer to block traffic updates 1658148863Ssam * which can generate a LOR against the node table lock; 1659148863Ssam * grab it here and stash the key index for our use below. 1660148863Ssam * 1661148863Ssam * Must also beware of recursion on the node table lock. 1662148863Ssam * When called from node_cleanup we may already have 1663148863Ssam * the node table lock held. Unfortunately there's no 1664148863Ssam * way to separate out this path so we must do this 1665148863Ssam * conditionally. 1666148863Ssam */ 1667148863Ssam isowned = IEEE80211_NODE_IS_LOCKED(nt); 1668148863Ssam if (!isowned) 1669148863Ssam IEEE80211_NODE_LOCK(nt); 1670148863Ssam keyix = ni->ni_ucastkey.wk_rxkeyix; 1671148863Ssam status = ieee80211_crypto_delkey(ic, &ni->ni_ucastkey); 1672148863Ssam if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) { 1673148863Ssam nikey = nt->nt_keyixmap[keyix]; 1674148863Ssam nt->nt_keyixmap[keyix] = NULL;; 1675148863Ssam } else 1676148863Ssam nikey = NULL; 1677148863Ssam if (!isowned) 1678148863Ssam IEEE80211_NODE_UNLOCK(&ic->ic_sta); 1679148863Ssam 1680148863Ssam if (nikey != NULL) { 1681148863Ssam KASSERT(nikey == ni, 1682148863Ssam ("key map out of sync, ni %p nikey %p", ni, nikey)); 1683148863Ssam IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE, 1684148863Ssam "%s: delete key map entry %p<%s> refcnt %d\n", 1685148863Ssam __func__, ni, ether_sprintf(ni->ni_macaddr), 1686148863Ssam ieee80211_node_refcnt(ni)-1); 1687148863Ssam ieee80211_free_node(ni); 1688148863Ssam } 1689148863Ssam return status; 1690148863Ssam} 1691148863Ssam 1692148863Ssam/* 1693138568Ssam * Reclaim a node. If this is the last reference count then 1694138568Ssam * do the normal free work. Otherwise remove it from the node 1695138568Ssam * table and mark it gone by clearing the back-reference. 1696138568Ssam */ 1697138568Ssamstatic void 1698138568Ssamnode_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 1699116742Ssam{ 1700148863Ssam ieee80211_keyix keyix; 1701138568Ssam 1702148863Ssam IEEE80211_NODE_LOCK_ASSERT(nt); 1703148863Ssam 1704140766Ssam IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE, 1705140766Ssam "%s: remove %p<%s> from %s table, refcnt %d\n", 1706140766Ssam __func__, ni, ether_sprintf(ni->ni_macaddr), 1707140766Ssam nt->nt_name, ieee80211_node_refcnt(ni)-1); 1708148863Ssam /* 1709148863Ssam * Clear any entry in the unicast key mapping table. 1710148863Ssam * We need to do it here so rx lookups don't find it 1711148863Ssam * in the mapping table even if it's not in the hash 1712148863Ssam * table. We cannot depend on the mapping table entry 1713148863Ssam * being cleared because the node may not be free'd. 1714148863Ssam */ 1715148863Ssam keyix = ni->ni_ucastkey.wk_rxkeyix; 1716148863Ssam if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax && 1717148863Ssam nt->nt_keyixmap[keyix] == ni) { 1718148863Ssam IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE, 1719148863Ssam "%s: %p<%s> clear key map entry\n", 1720148863Ssam __func__, ni, ether_sprintf(ni->ni_macaddr)); 1721148863Ssam nt->nt_keyixmap[keyix] = NULL; 1722148863Ssam ieee80211_node_decref(ni); /* NB: don't need free */ 1723148863Ssam } 1724138568Ssam if (!ieee80211_node_dectestref(ni)) { 1725138568Ssam /* 1726138568Ssam * Other references are present, just remove the 1727138568Ssam * node from the table so it cannot be found. When 1728138568Ssam * the references are dropped storage will be 1729140753Ssam * reclaimed. 1730138568Ssam */ 1731138568Ssam TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1732138568Ssam LIST_REMOVE(ni, ni_hash); 1733138568Ssam ni->ni_table = NULL; /* clear reference */ 1734138568Ssam } else 1735138568Ssam _ieee80211_free_node(ni); 1736138568Ssam} 1737138568Ssam 1738138568Ssamstatic void 1739138568Ssamieee80211_free_allnodes_locked(struct ieee80211_node_table *nt) 1740138568Ssam{ 1741138568Ssam struct ieee80211com *ic = nt->nt_ic; 1742116742Ssam struct ieee80211_node *ni; 1743116742Ssam 1744138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1745138568Ssam "%s: free all nodes in %s table\n", __func__, nt->nt_name); 1746138568Ssam 1747138568Ssam while ((ni = TAILQ_FIRST(&nt->nt_node)) != NULL) { 1748138568Ssam if (ni->ni_associd != 0) { 1749138568Ssam if (ic->ic_auth->ia_node_leave != NULL) 1750138568Ssam ic->ic_auth->ia_node_leave(ic, ni); 1751138568Ssam IEEE80211_AID_CLR(ni->ni_associd, ic->ic_aid_bitmap); 1752138568Ssam } 1753138568Ssam node_reclaim(nt, ni); 1754138568Ssam } 1755138568Ssam ieee80211_reset_erp(ic); 1756116742Ssam} 1757116742Ssam 1758138568Ssamstatic void 1759138568Ssamieee80211_free_allnodes(struct ieee80211_node_table *nt) 1760138568Ssam{ 1761138568Ssam 1762138568Ssam IEEE80211_NODE_LOCK(nt); 1763138568Ssam ieee80211_free_allnodes_locked(nt); 1764138568Ssam IEEE80211_NODE_UNLOCK(nt); 1765138568Ssam} 1766138568Ssam 1767120483Ssam/* 1768138568Ssam * Timeout entries in the scan cache. 1769138568Ssam */ 1770138568Ssamstatic void 1771138568Ssamieee80211_timeout_scan_candidates(struct ieee80211_node_table *nt) 1772138568Ssam{ 1773138568Ssam struct ieee80211com *ic = nt->nt_ic; 1774138568Ssam struct ieee80211_node *ni, *tni; 1775138568Ssam 1776138568Ssam IEEE80211_NODE_LOCK(nt); 1777138568Ssam ni = ic->ic_bss; 1778138568Ssam /* XXX belongs elsewhere */ 1779138568Ssam if (ni->ni_rxfrag[0] != NULL && ticks > ni->ni_rxfragstamp + hz) { 1780138568Ssam m_freem(ni->ni_rxfrag[0]); 1781138568Ssam ni->ni_rxfrag[0] = NULL; 1782138568Ssam } 1783138568Ssam TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, tni) { 1784138568Ssam if (ni->ni_inact && --ni->ni_inact == 0) { 1785138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1786138568Ssam "[%s] scan candidate purged from cache " 1787138568Ssam "(refcnt %u)\n", ether_sprintf(ni->ni_macaddr), 1788140766Ssam ieee80211_node_refcnt(ni)); 1789138568Ssam node_reclaim(nt, ni); 1790138568Ssam } 1791138568Ssam } 1792138568Ssam IEEE80211_NODE_UNLOCK(nt); 1793138568Ssam 1794138568Ssam nt->nt_inact_timer = IEEE80211_INACT_WAIT; 1795138568Ssam} 1796138568Ssam 1797138568Ssam/* 1798138568Ssam * Timeout inactive stations and do related housekeeping. 1799138568Ssam * Note that we cannot hold the node lock while sending a 1800138568Ssam * frame as this would lead to a LOR. Instead we use a 1801138568Ssam * generation number to mark nodes that we've scanned and 1802138568Ssam * drop the lock and restart a scan if we have to time out 1803138568Ssam * a node. Since we are single-threaded by virtue of 1804120483Ssam * controlling the inactivity timer we can be sure this will 1805120483Ssam * process each node only once. 1806120483Ssam */ 1807138568Ssamstatic void 1808138568Ssamieee80211_timeout_stations(struct ieee80211_node_table *nt) 1809116742Ssam{ 1810138568Ssam struct ieee80211com *ic = nt->nt_ic; 1811120483Ssam struct ieee80211_node *ni; 1812138568Ssam u_int gen; 1813148320Ssam int isadhoc; 1814116742Ssam 1815148320Ssam isadhoc = (ic->ic_opmode == IEEE80211_M_IBSS || 1816148320Ssam ic->ic_opmode == IEEE80211_M_AHDEMO); 1817138568Ssam IEEE80211_SCAN_LOCK(nt); 1818154532Ssam gen = ++nt->nt_scangen; 1819138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1820140766Ssam "%s: %s scangen %u\n", __func__, nt->nt_name, gen); 1821120483Ssamrestart: 1822138568Ssam IEEE80211_NODE_LOCK(nt); 1823138568Ssam TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 1824120483Ssam if (ni->ni_scangen == gen) /* previously handled */ 1825120483Ssam continue; 1826120483Ssam ni->ni_scangen = gen; 1827138568Ssam /* 1828147788Ssam * Ignore entries for which have yet to receive an 1829147788Ssam * authentication frame. These are transient and 1830147788Ssam * will be reclaimed when the last reference to them 1831147788Ssam * goes away (when frame xmits complete). 1832147788Ssam */ 1833148323Ssam if (ic->ic_opmode == IEEE80211_M_HOSTAP && 1834148323Ssam (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 1835147788Ssam continue; 1836147788Ssam /* 1837138568Ssam * Free fragment if not needed anymore 1838138568Ssam * (last fragment older than 1s). 1839138568Ssam * XXX doesn't belong here 1840138568Ssam */ 1841138568Ssam if (ni->ni_rxfrag[0] != NULL && 1842138568Ssam ticks > ni->ni_rxfragstamp + hz) { 1843138568Ssam m_freem(ni->ni_rxfrag[0]); 1844138568Ssam ni->ni_rxfrag[0] = NULL; 1845138568Ssam } 1846140498Ssam /* 1847140498Ssam * Special case ourself; we may be idle for extended periods 1848140498Ssam * of time and regardless reclaiming our state is wrong. 1849140498Ssam */ 1850140498Ssam if (ni == ic->ic_bss) 1851140498Ssam continue; 1852138568Ssam ni->ni_inact--; 1853148320Ssam if (ni->ni_associd != 0 || isadhoc) { 1854119150Ssam /* 1855138568Ssam * Age frames on the power save queue. The 1856138568Ssam * aging interval is 4 times the listen 1857138568Ssam * interval specified by the station. This 1858138568Ssam * number is factored into the age calculations 1859138568Ssam * when the frame is placed on the queue. We 1860138568Ssam * store ages as time differences we can check 1861138568Ssam * and/or adjust only the head of the list. 1862138568Ssam */ 1863138568Ssam if (IEEE80211_NODE_SAVEQ_QLEN(ni) != 0) { 1864138568Ssam struct mbuf *m; 1865138568Ssam int discard = 0; 1866138568Ssam 1867138568Ssam IEEE80211_NODE_SAVEQ_LOCK(ni); 1868138568Ssam while (IF_POLL(&ni->ni_savedq, m) != NULL && 1869138568Ssam M_AGE_GET(m) < IEEE80211_INACT_WAIT) { 1870138568SsamIEEE80211_DPRINTF(ic, IEEE80211_MSG_POWER, "[%s] discard frame, age %u\n", ether_sprintf(ni->ni_macaddr), M_AGE_GET(m));/*XXX*/ 1871138568Ssam _IEEE80211_NODE_SAVEQ_DEQUEUE_HEAD(ni, m); 1872138568Ssam m_freem(m); 1873138568Ssam discard++; 1874138568Ssam } 1875138568Ssam if (m != NULL) 1876138568Ssam M_AGE_SUB(m, IEEE80211_INACT_WAIT); 1877138568Ssam IEEE80211_NODE_SAVEQ_UNLOCK(ni); 1878138568Ssam 1879138568Ssam if (discard != 0) { 1880138568Ssam IEEE80211_DPRINTF(ic, 1881138568Ssam IEEE80211_MSG_POWER, 1882138568Ssam "[%s] discard %u frames for age\n", 1883138568Ssam ether_sprintf(ni->ni_macaddr), 1884138568Ssam discard); 1885138568Ssam IEEE80211_NODE_STAT_ADD(ni, 1886138568Ssam ps_discard, discard); 1887138568Ssam if (IEEE80211_NODE_SAVEQ_QLEN(ni) == 0) 1888148304Ssam ic->ic_set_tim(ni, 0); 1889138568Ssam } 1890138568Ssam } 1891138568Ssam /* 1892138568Ssam * Probe the station before time it out. We 1893138568Ssam * send a null data frame which may not be 1894138568Ssam * universally supported by drivers (need it 1895138568Ssam * for ps-poll support so it should be...). 1896138568Ssam */ 1897139528Ssam if (0 < ni->ni_inact && 1898139528Ssam ni->ni_inact <= ic->ic_inact_probe) { 1899148320Ssam IEEE80211_NOTE(ic, 1900148320Ssam IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, 1901148320Ssam ni, "%s", 1902148320Ssam "probe station due to inactivity"); 1903148582Ssam /* 1904148582Ssam * Grab a reference before unlocking the table 1905148582Ssam * so the node cannot be reclaimed before we 1906148582Ssam * send the frame. ieee80211_send_nulldata 1907148582Ssam * understands we've done this and reclaims the 1908148582Ssam * ref for us as needed. 1909148582Ssam */ 1910148582Ssam ieee80211_ref_node(ni); 1911138568Ssam IEEE80211_NODE_UNLOCK(nt); 1912148301Ssam ieee80211_send_nulldata(ni); 1913138568Ssam /* XXX stat? */ 1914138568Ssam goto restart; 1915138568Ssam } 1916138568Ssam } 1917138568Ssam if (ni->ni_inact <= 0) { 1918148320Ssam IEEE80211_NOTE(ic, 1919148320Ssam IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, ni, 1920148320Ssam "station timed out due to inactivity " 1921148320Ssam "(refcnt %u)", ieee80211_node_refcnt(ni)); 1922138568Ssam /* 1923138568Ssam * Send a deauthenticate frame and drop the station. 1924138568Ssam * This is somewhat complicated due to reference counts 1925138568Ssam * and locking. At this point a station will typically 1926138568Ssam * have a reference count of 1. ieee80211_node_leave 1927138568Ssam * will do a "free" of the node which will drop the 1928138568Ssam * reference count. But in the meantime a reference 1929138568Ssam * wil be held by the deauth frame. The actual reclaim 1930138568Ssam * of the node will happen either after the tx is 1931138568Ssam * completed or by ieee80211_node_leave. 1932120483Ssam * 1933138568Ssam * Separately we must drop the node lock before sending 1934138568Ssam * in case the driver takes a lock, as this will result 1935138568Ssam * in LOR between the node lock and the driver lock. 1936119150Ssam */ 1937138568Ssam IEEE80211_NODE_UNLOCK(nt); 1938138568Ssam if (ni->ni_associd != 0) { 1939138568Ssam IEEE80211_SEND_MGMT(ic, ni, 1940138568Ssam IEEE80211_FC0_SUBTYPE_DEAUTH, 1941138568Ssam IEEE80211_REASON_AUTH_EXPIRE); 1942138568Ssam } 1943138568Ssam ieee80211_node_leave(ic, ni); 1944121180Ssam ic->ic_stats.is_node_timeout++; 1945120483Ssam goto restart; 1946120483Ssam } 1947116742Ssam } 1948138568Ssam IEEE80211_NODE_UNLOCK(nt); 1949138568Ssam 1950138568Ssam IEEE80211_SCAN_UNLOCK(nt); 1951138568Ssam 1952138568Ssam nt->nt_inact_timer = IEEE80211_INACT_WAIT; 1953116742Ssam} 1954116742Ssam 1955116742Ssamvoid 1956138568Ssamieee80211_iterate_nodes(struct ieee80211_node_table *nt, ieee80211_iter_func *f, void *arg) 1957116742Ssam{ 1958116742Ssam struct ieee80211_node *ni; 1959138568Ssam u_int gen; 1960116742Ssam 1961138568Ssam IEEE80211_SCAN_LOCK(nt); 1962154532Ssam gen = ++nt->nt_scangen; 1963138568Ssamrestart: 1964138568Ssam IEEE80211_NODE_LOCK(nt); 1965138568Ssam TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 1966138568Ssam if (ni->ni_scangen != gen) { 1967138568Ssam ni->ni_scangen = gen; 1968138568Ssam (void) ieee80211_ref_node(ni); 1969138568Ssam IEEE80211_NODE_UNLOCK(nt); 1970138568Ssam (*f)(arg, ni); 1971138568Ssam ieee80211_free_node(ni); 1972138568Ssam goto restart; 1973138568Ssam } 1974138568Ssam } 1975138568Ssam IEEE80211_NODE_UNLOCK(nt); 1976138568Ssam 1977138568Ssam IEEE80211_SCAN_UNLOCK(nt); 1978116742Ssam} 1979138568Ssam 1980138568Ssamvoid 1981138568Ssamieee80211_dump_node(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 1982138568Ssam{ 1983138568Ssam printf("0x%p: mac %s refcnt %d\n", ni, 1984138568Ssam ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)); 1985138568Ssam printf("\tscangen %u authmode %u flags 0x%x\n", 1986138568Ssam ni->ni_scangen, ni->ni_authmode, ni->ni_flags); 1987138568Ssam printf("\tassocid 0x%x txpower %u vlan %u\n", 1988138568Ssam ni->ni_associd, ni->ni_txpower, ni->ni_vlan); 1989138568Ssam printf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n", 1990138568Ssam ni->ni_txseqs[0], 1991138568Ssam ni->ni_rxseqs[0] >> IEEE80211_SEQ_SEQ_SHIFT, 1992138568Ssam ni->ni_rxseqs[0] & IEEE80211_SEQ_FRAG_MASK, 1993138568Ssam ni->ni_rxfragstamp); 1994138568Ssam printf("\trstamp %u rssi %u intval %u capinfo 0x%x\n", 1995138568Ssam ni->ni_rstamp, ni->ni_rssi, ni->ni_intval, ni->ni_capinfo); 1996138568Ssam printf("\tbssid %s essid \"%.*s\" channel %u:0x%x\n", 1997138568Ssam ether_sprintf(ni->ni_bssid), 1998138568Ssam ni->ni_esslen, ni->ni_essid, 1999138568Ssam ni->ni_chan->ic_freq, ni->ni_chan->ic_flags); 2000138568Ssam printf("\tfails %u inact %u txrate %u\n", 2001138568Ssam ni->ni_fails, ni->ni_inact, ni->ni_txrate); 2002138568Ssam} 2003138568Ssam 2004138568Ssamvoid 2005138568Ssamieee80211_dump_nodes(struct ieee80211_node_table *nt) 2006138568Ssam{ 2007138568Ssam ieee80211_iterate_nodes(nt, 2008138568Ssam (ieee80211_iter_func *) ieee80211_dump_node, nt); 2009138568Ssam} 2010138568Ssam 2011138568Ssam/* 2012138568Ssam * Handle a station joining an 11g network. 2013138568Ssam */ 2014138568Ssamstatic void 2015138568Ssamieee80211_node_join_11g(struct ieee80211com *ic, struct ieee80211_node *ni) 2016138568Ssam{ 2017138568Ssam 2018138568Ssam /* 2019138568Ssam * Station isn't capable of short slot time. Bump 2020138568Ssam * the count of long slot time stations and disable 2021138568Ssam * use of short slot time. Note that the actual switch 2022138568Ssam * over to long slot time use may not occur until the 2023138568Ssam * next beacon transmission (per sec. 7.3.1.4 of 11g). 2024138568Ssam */ 2025138568Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2026138568Ssam ic->ic_longslotsta++; 2027138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 2028138568Ssam "[%s] station needs long slot time, count %d\n", 2029138568Ssam ether_sprintf(ni->ni_macaddr), ic->ic_longslotsta); 2030138568Ssam /* XXX vap's w/ conflicting needs won't work */ 2031138568Ssam ieee80211_set_shortslottime(ic, 0); 2032138568Ssam } 2033138568Ssam /* 2034138568Ssam * If the new station is not an ERP station 2035138568Ssam * then bump the counter and enable protection 2036138568Ssam * if configured. 2037138568Ssam */ 2038138568Ssam if (!ieee80211_iserp_rateset(ic, &ni->ni_rates)) { 2039138568Ssam ic->ic_nonerpsta++; 2040138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 2041138568Ssam "[%s] station is !ERP, %d non-ERP stations associated\n", 2042138568Ssam ether_sprintf(ni->ni_macaddr), ic->ic_nonerpsta); 2043138568Ssam /* 2044138568Ssam * If protection is configured, enable it. 2045138568Ssam */ 2046138568Ssam if (ic->ic_protmode != IEEE80211_PROT_NONE) { 2047138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 2048138568Ssam "%s: enable use of protection\n", __func__); 2049138568Ssam ic->ic_flags |= IEEE80211_F_USEPROT; 2050138568Ssam } 2051138568Ssam /* 2052138568Ssam * If station does not support short preamble 2053138568Ssam * then we must enable use of Barker preamble. 2054138568Ssam */ 2055138568Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) { 2056138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 2057138568Ssam "[%s] station needs long preamble\n", 2058138568Ssam ether_sprintf(ni->ni_macaddr)); 2059138568Ssam ic->ic_flags |= IEEE80211_F_USEBARKER; 2060138568Ssam ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; 2061138568Ssam } 2062153973Ssam if (ic->ic_nonerpsta == 1) 2063153973Ssam ic->ic_flags_ext |= IEEE80211_FEXT_ERPUPDATE; 2064138568Ssam } else 2065138568Ssam ni->ni_flags |= IEEE80211_NODE_ERP; 2066138568Ssam} 2067138568Ssam 2068138568Ssamvoid 2069138568Ssamieee80211_node_join(struct ieee80211com *ic, struct ieee80211_node *ni, int resp) 2070138568Ssam{ 2071138568Ssam int newassoc; 2072138568Ssam 2073138568Ssam if (ni->ni_associd == 0) { 2074138568Ssam u_int16_t aid; 2075138568Ssam 2076138568Ssam /* 2077138568Ssam * It would be good to search the bitmap 2078138568Ssam * more efficiently, but this will do for now. 2079138568Ssam */ 2080138568Ssam for (aid = 1; aid < ic->ic_max_aid; aid++) { 2081138568Ssam if (!IEEE80211_AID_ISSET(aid, 2082138568Ssam ic->ic_aid_bitmap)) 2083138568Ssam break; 2084138568Ssam } 2085138568Ssam if (aid >= ic->ic_max_aid) { 2086138568Ssam IEEE80211_SEND_MGMT(ic, ni, resp, 2087138568Ssam IEEE80211_REASON_ASSOC_TOOMANY); 2088138568Ssam ieee80211_node_leave(ic, ni); 2089138568Ssam return; 2090138568Ssam } 2091138568Ssam ni->ni_associd = aid | 0xc000; 2092138568Ssam IEEE80211_AID_SET(ni->ni_associd, ic->ic_aid_bitmap); 2093138568Ssam ic->ic_sta_assoc++; 2094138568Ssam newassoc = 1; 2095149031Ssam if (ic->ic_curmode == IEEE80211_MODE_11G) 2096138568Ssam ieee80211_node_join_11g(ic, ni); 2097138568Ssam } else 2098138568Ssam newassoc = 0; 2099138568Ssam 2100138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, 2101139523Ssam "[%s] station %sassociated at aid %d: %s preamble, %s slot time%s%s\n", 2102139523Ssam ether_sprintf(ni->ni_macaddr), newassoc ? "" : "re", 2103139523Ssam IEEE80211_NODE_AID(ni), 2104139523Ssam ic->ic_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long", 2105139523Ssam ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long", 2106139523Ssam ic->ic_flags & IEEE80211_F_USEPROT ? ", protection" : "", 2107139523Ssam ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "" 2108139523Ssam ); 2109138568Ssam 2110138568Ssam /* give driver a chance to setup state like ni_txrate */ 2111139524Ssam if (ic->ic_newassoc != NULL) 2112148307Ssam ic->ic_newassoc(ni, newassoc); 2113139528Ssam ni->ni_inact_reload = ic->ic_inact_auth; 2114139528Ssam ni->ni_inact = ni->ni_inact_reload; 2115138568Ssam IEEE80211_SEND_MGMT(ic, ni, resp, IEEE80211_STATUS_SUCCESS); 2116138568Ssam /* tell the authenticator about new station */ 2117138568Ssam if (ic->ic_auth->ia_node_join != NULL) 2118138568Ssam ic->ic_auth->ia_node_join(ic, ni); 2119138568Ssam ieee80211_notify_node_join(ic, ni, newassoc); 2120138568Ssam} 2121138568Ssam 2122138568Ssam/* 2123138568Ssam * Handle a station leaving an 11g network. 2124138568Ssam */ 2125138568Ssamstatic void 2126138568Ssamieee80211_node_leave_11g(struct ieee80211com *ic, struct ieee80211_node *ni) 2127138568Ssam{ 2128138568Ssam 2129149031Ssam KASSERT(ic->ic_curmode == IEEE80211_MODE_11G, 2130148941Ssam ("not in 11g, bss %u:0x%x, curmode %u", ni->ni_chan->ic_freq, 2131148941Ssam ni->ni_chan->ic_flags, ic->ic_curmode)); 2132138568Ssam 2133138568Ssam /* 2134138568Ssam * If a long slot station do the slot time bookkeeping. 2135138568Ssam */ 2136138568Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2137138568Ssam KASSERT(ic->ic_longslotsta > 0, 2138138568Ssam ("bogus long slot station count %d", ic->ic_longslotsta)); 2139138568Ssam ic->ic_longslotsta--; 2140138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 2141138568Ssam "[%s] long slot time station leaves, count now %d\n", 2142138568Ssam ether_sprintf(ni->ni_macaddr), ic->ic_longslotsta); 2143138568Ssam if (ic->ic_longslotsta == 0) { 2144138568Ssam /* 2145138568Ssam * Re-enable use of short slot time if supported 2146138568Ssam * and not operating in IBSS mode (per spec). 2147138568Ssam */ 2148138568Ssam if ((ic->ic_caps & IEEE80211_C_SHSLOT) && 2149138568Ssam ic->ic_opmode != IEEE80211_M_IBSS) { 2150138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 2151138568Ssam "%s: re-enable use of short slot time\n", 2152138568Ssam __func__); 2153138568Ssam ieee80211_set_shortslottime(ic, 1); 2154138568Ssam } 2155138568Ssam } 2156138568Ssam } 2157138568Ssam /* 2158138568Ssam * If a non-ERP station do the protection-related bookkeeping. 2159138568Ssam */ 2160138568Ssam if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) { 2161138568Ssam KASSERT(ic->ic_nonerpsta > 0, 2162138568Ssam ("bogus non-ERP station count %d", ic->ic_nonerpsta)); 2163138568Ssam ic->ic_nonerpsta--; 2164138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 2165138568Ssam "[%s] non-ERP station leaves, count now %d\n", 2166138568Ssam ether_sprintf(ni->ni_macaddr), ic->ic_nonerpsta); 2167138568Ssam if (ic->ic_nonerpsta == 0) { 2168138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 2169138568Ssam "%s: disable use of protection\n", __func__); 2170138568Ssam ic->ic_flags &= ~IEEE80211_F_USEPROT; 2171138568Ssam /* XXX verify mode? */ 2172138568Ssam if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) { 2173138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 2174138568Ssam "%s: re-enable use of short preamble\n", 2175138568Ssam __func__); 2176138568Ssam ic->ic_flags |= IEEE80211_F_SHPREAMBLE; 2177138568Ssam ic->ic_flags &= ~IEEE80211_F_USEBARKER; 2178138568Ssam } 2179153973Ssam ic->ic_flags_ext |= IEEE80211_FEXT_ERPUPDATE; 2180138568Ssam } 2181138568Ssam } 2182138568Ssam} 2183138568Ssam 2184138568Ssam/* 2185138568Ssam * Handle bookkeeping for station deauthentication/disassociation 2186138568Ssam * when operating as an ap. 2187138568Ssam */ 2188138568Ssamvoid 2189138568Ssamieee80211_node_leave(struct ieee80211com *ic, struct ieee80211_node *ni) 2190138568Ssam{ 2191140499Ssam struct ieee80211_node_table *nt = ni->ni_table; 2192138568Ssam 2193138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, 2194138568Ssam "[%s] station with aid %d leaves\n", 2195138568Ssam ether_sprintf(ni->ni_macaddr), IEEE80211_NODE_AID(ni)); 2196138568Ssam 2197138568Ssam KASSERT(ic->ic_opmode == IEEE80211_M_HOSTAP || 2198138568Ssam ic->ic_opmode == IEEE80211_M_IBSS || 2199138568Ssam ic->ic_opmode == IEEE80211_M_AHDEMO, 2200138568Ssam ("unexpected operating mode %u", ic->ic_opmode)); 2201138568Ssam /* 2202138568Ssam * If node wasn't previously associated all 2203138568Ssam * we need to do is reclaim the reference. 2204138568Ssam */ 2205138568Ssam /* XXX ibss mode bypasses 11g and notification */ 2206138568Ssam if (ni->ni_associd == 0) 2207138568Ssam goto done; 2208138568Ssam /* 2209138568Ssam * Tell the authenticator the station is leaving. 2210138568Ssam * Note that we must do this before yanking the 2211138568Ssam * association id as the authenticator uses the 2212138568Ssam * associd to locate it's state block. 2213138568Ssam */ 2214138568Ssam if (ic->ic_auth->ia_node_leave != NULL) 2215138568Ssam ic->ic_auth->ia_node_leave(ic, ni); 2216138568Ssam IEEE80211_AID_CLR(ni->ni_associd, ic->ic_aid_bitmap); 2217138568Ssam ni->ni_associd = 0; 2218138568Ssam ic->ic_sta_assoc--; 2219138568Ssam 2220149031Ssam if (ic->ic_curmode == IEEE80211_MODE_11G) 2221138568Ssam ieee80211_node_leave_11g(ic, ni); 2222138568Ssam /* 2223138568Ssam * Cleanup station state. In particular clear various 2224138568Ssam * state that might otherwise be reused if the node 2225138568Ssam * is reused before the reference count goes to zero 2226138568Ssam * (and memory is reclaimed). 2227138568Ssam */ 2228138568Ssam ieee80211_sta_leave(ic, ni); 2229138568Ssamdone: 2230140499Ssam /* 2231140499Ssam * Remove the node from any table it's recorded in and 2232140499Ssam * drop the caller's reference. Removal from the table 2233140499Ssam * is important to insure the node is not reprocessed 2234140499Ssam * for inactivity. 2235140499Ssam */ 2236140499Ssam if (nt != NULL) { 2237140499Ssam IEEE80211_NODE_LOCK(nt); 2238140499Ssam node_reclaim(nt, ni); 2239140499Ssam IEEE80211_NODE_UNLOCK(nt); 2240140499Ssam } else 2241140499Ssam ieee80211_free_node(ni); 2242138568Ssam} 2243138568Ssam 2244138568Ssamu_int8_t 2245138568Ssamieee80211_getrssi(struct ieee80211com *ic) 2246138568Ssam{ 2247138568Ssam#define NZ(x) ((x) == 0 ? 1 : (x)) 2248140753Ssam struct ieee80211_node_table *nt = &ic->ic_sta; 2249138568Ssam u_int32_t rssi_samples, rssi_total; 2250138568Ssam struct ieee80211_node *ni; 2251138568Ssam 2252138568Ssam rssi_total = 0; 2253138568Ssam rssi_samples = 0; 2254138568Ssam switch (ic->ic_opmode) { 2255138568Ssam case IEEE80211_M_IBSS: /* average of all ibss neighbors */ 2256138568Ssam /* XXX locking */ 2257140753Ssam TAILQ_FOREACH(ni, &nt->nt_node, ni_list) 2258138568Ssam if (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) { 2259138568Ssam rssi_samples++; 2260138568Ssam rssi_total += ic->ic_node_getrssi(ni); 2261138568Ssam } 2262138568Ssam break; 2263138568Ssam case IEEE80211_M_AHDEMO: /* average of all neighbors */ 2264138568Ssam /* XXX locking */ 2265140753Ssam TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2266138568Ssam rssi_samples++; 2267138568Ssam rssi_total += ic->ic_node_getrssi(ni); 2268138568Ssam } 2269138568Ssam break; 2270138568Ssam case IEEE80211_M_HOSTAP: /* average of all associated stations */ 2271138568Ssam /* XXX locking */ 2272140753Ssam TAILQ_FOREACH(ni, &nt->nt_node, ni_list) 2273138568Ssam if (IEEE80211_AID(ni->ni_associd) != 0) { 2274138568Ssam rssi_samples++; 2275138568Ssam rssi_total += ic->ic_node_getrssi(ni); 2276138568Ssam } 2277138568Ssam break; 2278138568Ssam case IEEE80211_M_MONITOR: /* XXX */ 2279138568Ssam case IEEE80211_M_STA: /* use stats from associated ap */ 2280138568Ssam default: 2281138568Ssam if (ic->ic_bss != NULL) 2282138568Ssam rssi_total = ic->ic_node_getrssi(ic->ic_bss); 2283138568Ssam rssi_samples = 1; 2284138568Ssam break; 2285138568Ssam } 2286138568Ssam return rssi_total / NZ(rssi_samples); 2287138568Ssam#undef NZ 2288138568Ssam} 2289138568Ssam 2290138568Ssam/* 2291138568Ssam * Indicate whether there are frames queued for a station in power-save mode. 2292138568Ssam */ 2293138568Ssamstatic void 2294148304Ssamieee80211_set_tim(struct ieee80211_node *ni, int set) 2295138568Ssam{ 2296148304Ssam struct ieee80211com *ic = ni->ni_ic; 2297138568Ssam u_int16_t aid; 2298138568Ssam 2299138568Ssam KASSERT(ic->ic_opmode == IEEE80211_M_HOSTAP || 2300138568Ssam ic->ic_opmode == IEEE80211_M_IBSS, 2301138568Ssam ("operating mode %u", ic->ic_opmode)); 2302138568Ssam 2303138568Ssam aid = IEEE80211_AID(ni->ni_associd); 2304138568Ssam KASSERT(aid < ic->ic_max_aid, 2305138568Ssam ("bogus aid %u, max %u", aid, ic->ic_max_aid)); 2306138568Ssam 2307138568Ssam IEEE80211_BEACON_LOCK(ic); 2308138568Ssam if (set != (isset(ic->ic_tim_bitmap, aid) != 0)) { 2309138568Ssam if (set) { 2310138568Ssam setbit(ic->ic_tim_bitmap, aid); 2311138568Ssam ic->ic_ps_pending++; 2312138568Ssam } else { 2313138568Ssam clrbit(ic->ic_tim_bitmap, aid); 2314138568Ssam ic->ic_ps_pending--; 2315138568Ssam } 2316138568Ssam ic->ic_flags |= IEEE80211_F_TIMUPDATE; 2317138568Ssam } 2318138568Ssam IEEE80211_BEACON_UNLOCK(ic); 2319138568Ssam} 2320138568Ssam 2321138568Ssam/* 2322138568Ssam * Node table support. 2323138568Ssam */ 2324138568Ssam 2325138568Ssamstatic void 2326138568Ssamieee80211_node_table_init(struct ieee80211com *ic, 2327138568Ssam struct ieee80211_node_table *nt, 2328148863Ssam const char *name, int inact, int keyixmax, 2329138568Ssam void (*timeout)(struct ieee80211_node_table *)) 2330138568Ssam{ 2331138568Ssam 2332138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 2333138568Ssam "%s %s table, inact %u\n", __func__, name, inact); 2334138568Ssam 2335138568Ssam nt->nt_ic = ic; 2336138568Ssam /* XXX need unit */ 2337138568Ssam IEEE80211_NODE_LOCK_INIT(nt, ic->ic_ifp->if_xname); 2338138568Ssam IEEE80211_SCAN_LOCK_INIT(nt, ic->ic_ifp->if_xname); 2339138568Ssam TAILQ_INIT(&nt->nt_node); 2340138568Ssam nt->nt_name = name; 2341138568Ssam nt->nt_scangen = 1; 2342138568Ssam nt->nt_inact_init = inact; 2343138568Ssam nt->nt_timeout = timeout; 2344148863Ssam nt->nt_keyixmax = keyixmax; 2345148863Ssam if (nt->nt_keyixmax > 0) { 2346148863Ssam MALLOC(nt->nt_keyixmap, struct ieee80211_node **, 2347148863Ssam keyixmax * sizeof(struct ieee80211_node *), 2348148863Ssam M_80211_NODE, M_NOWAIT | M_ZERO); 2349148863Ssam if (nt->nt_keyixmap == NULL) 2350148863Ssam if_printf(ic->ic_ifp, 2351148863Ssam "Cannot allocate key index map with %u entries\n", 2352148863Ssam keyixmax); 2353148863Ssam } else 2354148863Ssam nt->nt_keyixmap = NULL; 2355138568Ssam} 2356138568Ssam 2357138568Ssamvoid 2358138568Ssamieee80211_node_table_reset(struct ieee80211_node_table *nt) 2359138568Ssam{ 2360138568Ssam 2361138568Ssam IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE, 2362138568Ssam "%s %s table\n", __func__, nt->nt_name); 2363138568Ssam 2364138568Ssam IEEE80211_NODE_LOCK(nt); 2365138568Ssam nt->nt_inact_timer = 0; 2366138568Ssam ieee80211_free_allnodes_locked(nt); 2367138568Ssam IEEE80211_NODE_UNLOCK(nt); 2368138568Ssam} 2369138568Ssam 2370138568Ssamstatic void 2371138568Ssamieee80211_node_table_cleanup(struct ieee80211_node_table *nt) 2372138568Ssam{ 2373138568Ssam 2374138568Ssam IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE, 2375138568Ssam "%s %s table\n", __func__, nt->nt_name); 2376138568Ssam 2377148863Ssam IEEE80211_NODE_LOCK(nt); 2378138568Ssam ieee80211_free_allnodes_locked(nt); 2379148863Ssam if (nt->nt_keyixmap != NULL) { 2380148863Ssam /* XXX verify all entries are NULL */ 2381148863Ssam int i; 2382148863Ssam for (i = 0; i < nt->nt_keyixmax; i++) 2383148863Ssam if (nt->nt_keyixmap[i] != NULL) 2384148863Ssam printf("%s: %s[%u] still active\n", __func__, 2385148863Ssam nt->nt_name, i); 2386148863Ssam FREE(nt->nt_keyixmap, M_80211_NODE); 2387148863Ssam nt->nt_keyixmap = NULL; 2388148863Ssam } 2389138568Ssam IEEE80211_SCAN_LOCK_DESTROY(nt); 2390138568Ssam IEEE80211_NODE_LOCK_DESTROY(nt); 2391138568Ssam} 2392