ieee80211_node.c revision 143715
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 143715 2005-03-16 20:40:48Z 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 52138568Ssamstatic struct ieee80211_node *node_alloc(struct ieee80211_node_table *); 53138568Ssamstatic void node_cleanup(struct ieee80211_node *); 54138568Ssamstatic void node_free(struct ieee80211_node *); 55138568Ssamstatic u_int8_t node_getrssi(const struct ieee80211_node *); 56116742Ssam 57138568Ssamstatic void ieee80211_setup_node(struct ieee80211_node_table *, 58138568Ssam struct ieee80211_node *, const u_int8_t *); 59138568Ssamstatic void _ieee80211_free_node(struct ieee80211_node *); 60138568Ssamstatic void ieee80211_free_allnodes(struct ieee80211_node_table *); 61120104Ssam 62138568Ssamstatic void ieee80211_timeout_scan_candidates(struct ieee80211_node_table *); 63138568Ssamstatic void ieee80211_timeout_stations(struct ieee80211_node_table *); 64116742Ssam 65138568Ssamstatic void ieee80211_set_tim(struct ieee80211com *, 66138568Ssam struct ieee80211_node *, int set); 67138568Ssam 68138568Ssamstatic void ieee80211_node_table_init(struct ieee80211com *ic, 69138568Ssam struct ieee80211_node_table *nt, const char *name, int inact, 70138568Ssam void (*timeout)(struct ieee80211_node_table *)); 71138568Ssamstatic void ieee80211_node_table_cleanup(struct ieee80211_node_table *nt); 72138568Ssam 73127876SsamMALLOC_DEFINE(M_80211_NODE, "80211node", "802.11 node state"); 74120481Ssam 75116742Ssamvoid 76138568Ssamieee80211_node_attach(struct ieee80211com *ic) 77116742Ssam{ 78116742Ssam 79140753Ssam ieee80211_node_table_init(ic, &ic->ic_sta, "station", 80140753Ssam IEEE80211_INACT_INIT, ieee80211_timeout_stations); 81138568Ssam ieee80211_node_table_init(ic, &ic->ic_scan, "scan", 82138568Ssam IEEE80211_INACT_SCAN, ieee80211_timeout_scan_candidates); 83138568Ssam 84138568Ssam ic->ic_node_alloc = node_alloc; 85138568Ssam ic->ic_node_free = node_free; 86138568Ssam ic->ic_node_cleanup = node_cleanup; 87138568Ssam ic->ic_node_getrssi = node_getrssi; 88138568Ssam 89138568Ssam /* default station inactivity timer setings */ 90138568Ssam ic->ic_inact_init = IEEE80211_INACT_INIT; 91138568Ssam ic->ic_inact_auth = IEEE80211_INACT_AUTH; 92138568Ssam ic->ic_inact_run = IEEE80211_INACT_RUN; 93138568Ssam ic->ic_inact_probe = IEEE80211_INACT_PROBE; 94138568Ssam 95138568Ssam /* XXX defer */ 96138568Ssam if (ic->ic_max_aid == 0) 97138568Ssam ic->ic_max_aid = IEEE80211_AID_DEF; 98138568Ssam else if (ic->ic_max_aid > IEEE80211_AID_MAX) 99138568Ssam ic->ic_max_aid = IEEE80211_AID_MAX; 100138568Ssam MALLOC(ic->ic_aid_bitmap, u_int32_t *, 101138568Ssam howmany(ic->ic_max_aid, 32) * sizeof(u_int32_t), 102138568Ssam M_DEVBUF, M_NOWAIT | M_ZERO); 103138568Ssam if (ic->ic_aid_bitmap == NULL) { 104138568Ssam /* XXX no way to recover */ 105138568Ssam printf("%s: no memory for AID bitmap!\n", __func__); 106138568Ssam ic->ic_max_aid = 0; 107138568Ssam } 108138568Ssam 109138568Ssam /* XXX defer until using hostap/ibss mode */ 110138568Ssam ic->ic_tim_len = howmany(ic->ic_max_aid, 8) * sizeof(u_int8_t); 111138568Ssam MALLOC(ic->ic_tim_bitmap, u_int8_t *, ic->ic_tim_len, 112138568Ssam M_DEVBUF, M_NOWAIT | M_ZERO); 113138568Ssam if (ic->ic_tim_bitmap == NULL) { 114138568Ssam /* XXX no way to recover */ 115138568Ssam printf("%s: no memory for TIM bitmap!\n", __func__); 116138568Ssam } 117138568Ssam ic->ic_set_tim = ieee80211_set_tim; /* NB: driver should override */ 118118887Ssam} 119118887Ssam 120118887Ssamvoid 121138568Ssamieee80211_node_lateattach(struct ieee80211com *ic) 122118887Ssam{ 123127766Ssam struct ieee80211_node *ni; 124138568Ssam struct ieee80211_rsnparms *rsn; 125118887Ssam 126138568Ssam ni = ieee80211_alloc_node(&ic->ic_scan, ic->ic_myaddr); 127127766Ssam KASSERT(ni != NULL, ("unable to setup inital BSS node")); 128138568Ssam /* 129138568Ssam * Setup "global settings" in the bss node so that 130138568Ssam * each new station automatically inherits them. 131138568Ssam */ 132138568Ssam rsn = &ni->ni_rsn; 133138568Ssam /* WEP, TKIP, and AES-CCM are always supported */ 134138568Ssam rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_WEP; 135138568Ssam rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_TKIP; 136138568Ssam rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_AES_CCM; 137138568Ssam if (ic->ic_caps & IEEE80211_C_AES) 138138568Ssam rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_AES_OCB; 139138568Ssam if (ic->ic_caps & IEEE80211_C_CKIP) 140138568Ssam rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_CKIP; 141138568Ssam /* 142138568Ssam * Default unicast cipher to WEP for 802.1x use. If 143138568Ssam * WPA is enabled the management code will set these 144138568Ssam * values to reflect. 145138568Ssam */ 146138568Ssam rsn->rsn_ucastcipher = IEEE80211_CIPHER_WEP; 147138568Ssam rsn->rsn_ucastkeylen = 104 / NBBY; 148138568Ssam /* 149138568Ssam * WPA says the multicast cipher is the lowest unicast 150138568Ssam * cipher supported. But we skip WEP which would 151138568Ssam * otherwise be used based on this criteria. 152138568Ssam */ 153138568Ssam rsn->rsn_mcastcipher = IEEE80211_CIPHER_TKIP; 154138568Ssam rsn->rsn_mcastkeylen = 128 / NBBY; 155138568Ssam 156138568Ssam /* 157138568Ssam * We support both WPA-PSK and 802.1x; the one used 158138568Ssam * is determined by the authentication mode and the 159138568Ssam * setting of the PSK state. 160138568Ssam */ 161138568Ssam rsn->rsn_keymgmtset = WPA_ASE_8021X_UNSPEC | WPA_ASE_8021X_PSK; 162138568Ssam rsn->rsn_keymgmt = WPA_ASE_8021X_PSK; 163138568Ssam 164138568Ssam ic->ic_bss = ieee80211_ref_node(ni); /* hold reference */ 165138568Ssam ic->ic_auth = ieee80211_authenticator_get(ni->ni_authmode); 166116742Ssam} 167116742Ssam 168116742Ssamvoid 169138568Ssamieee80211_node_detach(struct ieee80211com *ic) 170116742Ssam{ 171116742Ssam 172138568Ssam if (ic->ic_bss != NULL) { 173138568Ssam ieee80211_free_node(ic->ic_bss); 174138568Ssam ic->ic_bss = NULL; 175138568Ssam } 176138568Ssam ieee80211_node_table_cleanup(&ic->ic_scan); 177140753Ssam ieee80211_node_table_cleanup(&ic->ic_sta); 178138568Ssam if (ic->ic_aid_bitmap != NULL) { 179138568Ssam FREE(ic->ic_aid_bitmap, M_DEVBUF); 180138568Ssam ic->ic_aid_bitmap = NULL; 181138568Ssam } 182138568Ssam if (ic->ic_tim_bitmap != NULL) { 183138568Ssam FREE(ic->ic_tim_bitmap, M_DEVBUF); 184138568Ssam ic->ic_tim_bitmap = NULL; 185138568Ssam } 186116742Ssam} 187116742Ssam 188138568Ssam/* 189138568Ssam * Port authorize/unauthorize interfaces for use by an authenticator. 190138568Ssam */ 191138568Ssam 192138568Ssamvoid 193138568Ssamieee80211_node_authorize(struct ieee80211com *ic, struct ieee80211_node *ni) 194138568Ssam{ 195138568Ssam ni->ni_flags |= IEEE80211_NODE_AUTH; 196139528Ssam ni->ni_inact_reload = ic->ic_inact_run; 197138568Ssam} 198138568Ssam 199138568Ssamvoid 200138568Ssamieee80211_node_unauthorize(struct ieee80211com *ic, struct ieee80211_node *ni) 201138568Ssam{ 202138568Ssam ni->ni_flags &= ~IEEE80211_NODE_AUTH; 203138568Ssam} 204138568Ssam 205116742Ssam/* 206138568Ssam * Set/change the channel. The rate set is also updated as 207138568Ssam * to insure a consistent view by drivers. 208138568Ssam */ 209138568Ssamstatic __inline void 210138568Ssamieee80211_set_chan(struct ieee80211com *ic, 211138568Ssam struct ieee80211_node *ni, struct ieee80211_channel *chan) 212138568Ssam{ 213138568Ssam ni->ni_chan = chan; 214138568Ssam ni->ni_rates = ic->ic_sup_rates[ieee80211_chan2mode(ic, chan)]; 215138568Ssam} 216138568Ssam 217138568Ssam/* 218116742Ssam * AP scanning support. 219116742Ssam */ 220116742Ssam 221138568Ssam#ifdef IEEE80211_DEBUG 222138568Ssamstatic void 223138568Ssamdump_chanlist(const u_char chans[]) 224138568Ssam{ 225138568Ssam const char *sep; 226138568Ssam int i; 227138568Ssam 228138568Ssam sep = " "; 229138568Ssam for (i = 0; i < IEEE80211_CHAN_MAX; i++) 230138568Ssam if (isset(chans, i)) { 231138568Ssam printf("%s%u", sep, i); 232138568Ssam sep = ", "; 233138568Ssam } 234138568Ssam} 235138568Ssam#endif /* IEEE80211_DEBUG */ 236138568Ssam 237116742Ssam/* 238138568Ssam * Initialize the channel set to scan based on the 239116742Ssam * of available channels and the current PHY mode. 240116742Ssam */ 241117811Ssamstatic void 242138568Ssamieee80211_reset_scan(struct ieee80211com *ic) 243116742Ssam{ 244116742Ssam 245138568Ssam /* XXX ic_des_chan should be handled with ic_chan_active */ 246138568Ssam if (ic->ic_des_chan != IEEE80211_CHAN_ANYC) { 247138568Ssam memset(ic->ic_chan_scan, 0, sizeof(ic->ic_chan_scan)); 248138568Ssam setbit(ic->ic_chan_scan, 249138568Ssam ieee80211_chan2ieee(ic, ic->ic_des_chan)); 250138568Ssam } else 251138568Ssam memcpy(ic->ic_chan_scan, ic->ic_chan_active, 252138568Ssam sizeof(ic->ic_chan_active)); 253117811Ssam /* NB: hack, setup so next_scan starts with the first channel */ 254117811Ssam if (ic->ic_bss->ni_chan == IEEE80211_CHAN_ANYC) 255138568Ssam ieee80211_set_chan(ic, ic->ic_bss, 256138568Ssam &ic->ic_channels[IEEE80211_CHAN_MAX]); 257138568Ssam#ifdef IEEE80211_DEBUG 258138568Ssam if (ieee80211_msg_scan(ic)) { 259138568Ssam printf("%s: scan set:", __func__); 260138568Ssam dump_chanlist(ic->ic_chan_scan); 261138568Ssam printf(" start chan %u\n", 262138568Ssam ieee80211_chan2ieee(ic, ic->ic_bss->ni_chan)); 263138568Ssam } 264138568Ssam#endif /* IEEE80211_DEBUG */ 265116742Ssam} 266116742Ssam 267116742Ssam/* 268116742Ssam * Begin an active scan. 269116742Ssam */ 270116742Ssamvoid 271138568Ssamieee80211_begin_scan(struct ieee80211com *ic, int reset) 272116742Ssam{ 273116742Ssam 274138568Ssam ic->ic_scan.nt_scangen++; 275117811Ssam /* 276117811Ssam * In all but hostap mode scanning starts off in 277117811Ssam * an active mode before switching to passive. 278117811Ssam */ 279121180Ssam if (ic->ic_opmode != IEEE80211_M_HOSTAP) { 280117811Ssam ic->ic_flags |= IEEE80211_F_ASCAN; 281121180Ssam ic->ic_stats.is_scan_active++; 282121180Ssam } else 283121180Ssam ic->ic_stats.is_scan_passive++; 284139520Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, 285139520Ssam "begin %s scan in %s mode, scangen %u\n", 286138568Ssam (ic->ic_flags & IEEE80211_F_ASCAN) ? "active" : "passive", 287139520Ssam ieee80211_phymode_name[ic->ic_curmode], ic->ic_scan.nt_scangen); 288116742Ssam /* 289138568Ssam * Clear scan state and flush any previously seen AP's. 290116742Ssam */ 291138568Ssam ieee80211_reset_scan(ic); 292138568Ssam if (reset) 293138568Ssam ieee80211_free_allnodes(&ic->ic_scan); 294116742Ssam 295138568Ssam ic->ic_flags |= IEEE80211_F_SCAN; 296138568Ssam 297117811Ssam /* Scan the next channel. */ 298138568Ssam ieee80211_next_scan(ic); 299116742Ssam} 300116742Ssam 301116742Ssam/* 302116742Ssam * Switch to the next channel marked for scanning. 303116742Ssam */ 304138568Ssamint 305138568Ssamieee80211_next_scan(struct ieee80211com *ic) 306116742Ssam{ 307116742Ssam struct ieee80211_channel *chan; 308116742Ssam 309138568Ssam /* 310138568Ssam * Insure any previous mgt frame timeouts don't fire. 311138568Ssam * This assumes the driver does the right thing in 312138568Ssam * flushing anything queued in the driver and below. 313138568Ssam */ 314138568Ssam ic->ic_mgt_timer = 0; 315138568Ssam 316116742Ssam chan = ic->ic_bss->ni_chan; 317138568Ssam do { 318116742Ssam if (++chan > &ic->ic_channels[IEEE80211_CHAN_MAX]) 319116742Ssam chan = &ic->ic_channels[0]; 320116742Ssam if (isset(ic->ic_chan_scan, ieee80211_chan2ieee(ic, chan))) { 321138568Ssam clrbit(ic->ic_chan_scan, ieee80211_chan2ieee(ic, chan)); 322138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, 323138568Ssam "%s: chan %d->%d\n", __func__, 324138568Ssam ieee80211_chan2ieee(ic, ic->ic_bss->ni_chan), 325138568Ssam ieee80211_chan2ieee(ic, chan)); 326138568Ssam ieee80211_set_chan(ic, ic->ic_bss, chan); 327138568Ssam#ifdef notyet 328138568Ssam /* XXX driver state change */ 329116742Ssam /* 330138568Ssam * Scan next channel. If doing an active scan 331138568Ssam * and the channel is not marked passive-only 332138568Ssam * then send a probe request. Otherwise just 333138568Ssam * listen for beacons on the channel. 334116742Ssam */ 335138568Ssam if ((ic->ic_flags & IEEE80211_F_ASCAN) && 336138568Ssam (ni->ni_chan->ic_flags & IEEE80211_CHAN_PASSIVE) == 0) { 337138568Ssam IEEE80211_SEND_MGMT(ic, ni, 338138568Ssam IEEE80211_FC0_SUBTYPE_PROBE_REQ, 0); 339138568Ssam } 340138568Ssam#else 341138568Ssam ieee80211_new_state(ic, IEEE80211_S_SCAN, -1); 342138568Ssam#endif 343138568Ssam return 1; 344116742Ssam } 345138568Ssam } while (chan != ic->ic_bss->ni_chan); 346138568Ssam ieee80211_end_scan(ic); 347138568Ssam return 0; 348116742Ssam} 349116742Ssam 350141658Ssamstatic __inline void 351141658Ssamcopy_bss(struct ieee80211_node *nbss, const struct ieee80211_node *obss) 352141658Ssam{ 353141658Ssam /* propagate useful state */ 354141658Ssam nbss->ni_authmode = obss->ni_authmode; 355141658Ssam nbss->ni_txpower = obss->ni_txpower; 356141658Ssam nbss->ni_vlan = obss->ni_vlan; 357141658Ssam nbss->ni_rsn = obss->ni_rsn; 358141658Ssam /* XXX statistics? */ 359141658Ssam} 360141658Ssam 361116742Ssamvoid 362116742Ssamieee80211_create_ibss(struct ieee80211com* ic, struct ieee80211_channel *chan) 363116742Ssam{ 364140753Ssam struct ieee80211_node_table *nt; 365116742Ssam struct ieee80211_node *ni; 366116742Ssam 367138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, 368138568Ssam "%s: creating ibss\n", __func__); 369138568Ssam 370138568Ssam /* 371138568Ssam * Create the station/neighbor table. Note that for adhoc 372138568Ssam * mode we make the initial inactivity timer longer since 373138568Ssam * we create nodes only through discovery and they typically 374138568Ssam * are long-lived associations. 375138568Ssam */ 376140753Ssam nt = &ic->ic_sta; 377140753Ssam IEEE80211_NODE_LOCK(nt); 378140753Ssam if (ic->ic_opmode == IEEE80211_M_HOSTAP) { 379140753Ssam nt->nt_name = "station"; 380140753Ssam nt->nt_inact_init = ic->ic_inact_init; 381140753Ssam } else { 382140753Ssam nt->nt_name = "neighbor"; 383140753Ssam nt->nt_inact_init = ic->ic_inact_run; 384140753Ssam } 385140753Ssam IEEE80211_NODE_UNLOCK(nt); 386140753Ssam 387140753Ssam ni = ieee80211_alloc_node(nt, ic->ic_myaddr); 388140753Ssam if (ni == NULL) { 389140753Ssam /* XXX recovery? */ 390138568Ssam return; 391138568Ssam } 392116742Ssam IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_myaddr); 393116742Ssam ni->ni_esslen = ic->ic_des_esslen; 394116742Ssam memcpy(ni->ni_essid, ic->ic_des_essid, ni->ni_esslen); 395141658Ssam copy_bss(ni, ic->ic_bss); 396116742Ssam ni->ni_intval = ic->ic_lintval; 397138568Ssam if (ic->ic_flags & IEEE80211_F_PRIVACY) 398116742Ssam ni->ni_capinfo |= IEEE80211_CAPINFO_PRIVACY; 399116742Ssam if (ic->ic_phytype == IEEE80211_T_FH) { 400116742Ssam ni->ni_fhdwell = 200; /* XXX */ 401116742Ssam ni->ni_fhindex = 1; 402116742Ssam } 403138568Ssam if (ic->ic_opmode == IEEE80211_M_IBSS) { 404138568Ssam ic->ic_flags |= IEEE80211_F_SIBSS; 405138568Ssam ni->ni_capinfo |= IEEE80211_CAPINFO_IBSS; /* XXX */ 406143300Ssam if (ic->ic_flags & IEEE80211_F_DESBSSID) 407143300Ssam IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_des_bssid); 408143300Ssam else 409143300Ssam ni->ni_bssid[0] |= 0x02; /* local bit for IBSS */ 410138568Ssam } 411138568Ssam /* 412138568Ssam * Fix the channel and related attributes. 413138568Ssam */ 414138568Ssam ieee80211_set_chan(ic, ni, chan); 415138568Ssam ic->ic_curmode = ieee80211_chan2mode(ic, chan); 416138568Ssam /* 417138568Ssam * Do mode-specific rate setup. 418138568Ssam */ 419138568Ssam if (ic->ic_curmode == IEEE80211_MODE_11G) { 420138568Ssam /* 421138568Ssam * Use a mixed 11b/11g rate set. 422138568Ssam */ 423138568Ssam ieee80211_set11gbasicrates(&ni->ni_rates, IEEE80211_MODE_11G); 424138568Ssam } else if (ic->ic_curmode == IEEE80211_MODE_11B) { 425138568Ssam /* 426138568Ssam * Force pure 11b rate set. 427138568Ssam */ 428138568Ssam ieee80211_set11gbasicrates(&ni->ni_rates, IEEE80211_MODE_11B); 429138568Ssam } 430138568Ssam 431140753Ssam (void) ieee80211_sta_join(ic, ieee80211_ref_node(ni)); 432116742Ssam} 433116742Ssam 434138568Ssamvoid 435138568Ssamieee80211_reset_bss(struct ieee80211com *ic) 436138568Ssam{ 437138568Ssam struct ieee80211_node *ni, *obss; 438138568Ssam 439138568Ssam ieee80211_node_table_reset(&ic->ic_scan); 440140753Ssam ieee80211_node_table_reset(&ic->ic_sta); 441140753Ssam 442138568Ssam ni = ieee80211_alloc_node(&ic->ic_scan, ic->ic_myaddr); 443138568Ssam KASSERT(ni != NULL, ("unable to setup inital BSS node")); 444138568Ssam obss = ic->ic_bss; 445138568Ssam ic->ic_bss = ieee80211_ref_node(ni); 446141658Ssam if (obss != NULL) { 447141658Ssam copy_bss(ni, obss); 448141658Ssam ni->ni_intval = ic->ic_lintval; 449138568Ssam ieee80211_free_node(obss); 450141658Ssam } 451138568Ssam} 452138568Ssam 453127767Ssamstatic int 454138568Ssamieee80211_match_bss(struct ieee80211com *ic, struct ieee80211_node *ni) 455127767Ssam{ 456127767Ssam u_int8_t rate; 457127767Ssam int fail; 458127767Ssam 459127767Ssam fail = 0; 460127767Ssam if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 461127767Ssam fail |= 0x01; 462127767Ssam if (ic->ic_des_chan != IEEE80211_CHAN_ANYC && 463127767Ssam ni->ni_chan != ic->ic_des_chan) 464127767Ssam fail |= 0x01; 465127767Ssam if (ic->ic_opmode == IEEE80211_M_IBSS) { 466127767Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 467127767Ssam fail |= 0x02; 468127767Ssam } else { 469127767Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 470127767Ssam fail |= 0x02; 471127767Ssam } 472138568Ssam if (ic->ic_flags & IEEE80211_F_PRIVACY) { 473127767Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 474127767Ssam fail |= 0x04; 475127767Ssam } else { 476127767Ssam /* XXX does this mean privacy is supported or required? */ 477127767Ssam if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 478127767Ssam fail |= 0x04; 479127767Ssam } 480140440Ssam rate = ieee80211_fix_rate(ic, ni, 481140440Ssam IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 482127767Ssam if (rate & IEEE80211_RATE_BASIC) 483127767Ssam fail |= 0x08; 484127767Ssam if (ic->ic_des_esslen != 0 && 485127767Ssam (ni->ni_esslen != ic->ic_des_esslen || 486127767Ssam memcmp(ni->ni_essid, ic->ic_des_essid, ic->ic_des_esslen) != 0)) 487127767Ssam fail |= 0x10; 488127767Ssam if ((ic->ic_flags & IEEE80211_F_DESBSSID) && 489127767Ssam !IEEE80211_ADDR_EQ(ic->ic_des_bssid, ni->ni_bssid)) 490127767Ssam fail |= 0x20; 491127767Ssam#ifdef IEEE80211_DEBUG 492138568Ssam if (ieee80211_msg_scan(ic)) { 493127767Ssam printf(" %c %s", fail ? '-' : '+', 494127767Ssam ether_sprintf(ni->ni_macaddr)); 495127767Ssam printf(" %s%c", ether_sprintf(ni->ni_bssid), 496127767Ssam fail & 0x20 ? '!' : ' '); 497127767Ssam printf(" %3d%c", ieee80211_chan2ieee(ic, ni->ni_chan), 498127767Ssam fail & 0x01 ? '!' : ' '); 499127767Ssam printf(" %+4d", ni->ni_rssi); 500127767Ssam printf(" %2dM%c", (rate & IEEE80211_RATE_VAL) / 2, 501127767Ssam fail & 0x08 ? '!' : ' '); 502127767Ssam printf(" %4s%c", 503127767Ssam (ni->ni_capinfo & IEEE80211_CAPINFO_ESS) ? "ess" : 504127767Ssam (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) ? "ibss" : 505127767Ssam "????", 506127767Ssam fail & 0x02 ? '!' : ' '); 507127767Ssam printf(" %3s%c ", 508127767Ssam (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) ? 509127767Ssam "wep" : "no", 510127767Ssam fail & 0x04 ? '!' : ' '); 511127767Ssam ieee80211_print_essid(ni->ni_essid, ni->ni_esslen); 512127767Ssam printf("%s\n", fail & 0x10 ? "!" : ""); 513127767Ssam } 514127767Ssam#endif 515127767Ssam return fail; 516127767Ssam} 517127767Ssam 518138568Ssamstatic __inline u_int8_t 519138568Ssammaxrate(const struct ieee80211_node *ni) 520138568Ssam{ 521138568Ssam const struct ieee80211_rateset *rs = &ni->ni_rates; 522138568Ssam /* NB: assumes rate set is sorted (happens on frame receive) */ 523138568Ssam return rs->rs_rates[rs->rs_nrates-1] & IEEE80211_RATE_VAL; 524138568Ssam} 525138568Ssam 526116742Ssam/* 527138568Ssam * Compare the capabilities of two nodes and decide which is 528138568Ssam * more desirable (return >0 if a is considered better). Note 529138568Ssam * that we assume compatibility/usability has already been checked 530138568Ssam * so we don't need to (e.g. validate whether privacy is supported). 531138568Ssam * Used to select the best scan candidate for association in a BSS. 532138568Ssam */ 533138568Ssamstatic int 534138568Ssamieee80211_node_compare(struct ieee80211com *ic, 535138568Ssam const struct ieee80211_node *a, 536138568Ssam const struct ieee80211_node *b) 537138568Ssam{ 538138568Ssam u_int8_t maxa, maxb; 539138568Ssam u_int8_t rssia, rssib; 540138568Ssam 541138568Ssam /* privacy support preferred */ 542138568Ssam if ((a->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) && 543138568Ssam (b->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 544138568Ssam return 1; 545138568Ssam if ((a->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0 && 546138568Ssam (b->ni_capinfo & IEEE80211_CAPINFO_PRIVACY)) 547138568Ssam return -1; 548138568Ssam 549138568Ssam rssia = ic->ic_node_getrssi(a); 550138568Ssam rssib = ic->ic_node_getrssi(b); 551139543Ssam if (abs(rssib - rssia) < 5) { 552139543Ssam /* best/max rate preferred if signal level close enough XXX */ 553139543Ssam maxa = maxrate(a); 554139543Ssam maxb = maxrate(b); 555139543Ssam if (maxa != maxb) 556139543Ssam return maxa - maxb; 557139543Ssam /* XXX use freq for channel preference */ 558139543Ssam /* for now just prefer 5Ghz band to all other bands */ 559139543Ssam if (IEEE80211_IS_CHAN_5GHZ(a->ni_chan) && 560139543Ssam !IEEE80211_IS_CHAN_5GHZ(b->ni_chan)) 561139543Ssam return 1; 562139543Ssam if (!IEEE80211_IS_CHAN_5GHZ(a->ni_chan) && 563139543Ssam IEEE80211_IS_CHAN_5GHZ(b->ni_chan)) 564139543Ssam return -1; 565139543Ssam } 566138568Ssam /* all things being equal, use signal level */ 567138568Ssam return rssia - rssib; 568138568Ssam} 569138568Ssam 570138568Ssam/* 571140441Ssam * Mark an ongoing scan stopped. 572140441Ssam */ 573140441Ssamvoid 574140441Ssamieee80211_cancel_scan(struct ieee80211com *ic) 575140441Ssam{ 576140441Ssam 577140441Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, "%s: end %s scan\n", 578140441Ssam __func__, 579140441Ssam (ic->ic_flags & IEEE80211_F_ASCAN) ? "active" : "passive"); 580140441Ssam 581140441Ssam ic->ic_flags &= ~(IEEE80211_F_SCAN | IEEE80211_F_ASCAN); 582140441Ssam} 583140441Ssam 584140441Ssam/* 585116742Ssam * Complete a scan of potential channels. 586116742Ssam */ 587116742Ssamvoid 588138568Ssamieee80211_end_scan(struct ieee80211com *ic) 589116742Ssam{ 590140448Ssam struct ieee80211_node_table *nt = &ic->ic_scan; 591140448Ssam struct ieee80211_node *ni, *selbs; 592116742Ssam 593140441Ssam ieee80211_cancel_scan(ic); 594140441Ssam ieee80211_notify_scan_done(ic); 595116742Ssam 596116742Ssam if (ic->ic_opmode == IEEE80211_M_HOSTAP) { 597138568Ssam u_int8_t maxrssi[IEEE80211_CHAN_MAX]; /* XXX off stack? */ 598138568Ssam int i, bestchan; 599138568Ssam u_int8_t rssi; 600138568Ssam 601116742Ssam /* 602116742Ssam * The passive scan to look for existing AP's completed, 603116742Ssam * select a channel to camp on. Identify the channels 604116742Ssam * that already have one or more AP's and try to locate 605140753Ssam * an unoccupied one. If that fails, pick a channel that 606138568Ssam * looks to be quietest. 607116742Ssam */ 608138568Ssam memset(maxrssi, 0, sizeof(maxrssi)); 609140448Ssam IEEE80211_NODE_LOCK(nt); 610140448Ssam TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 611138568Ssam rssi = ic->ic_node_getrssi(ni); 612138568Ssam i = ieee80211_chan2ieee(ic, ni->ni_chan); 613138568Ssam if (rssi > maxrssi[i]) 614138568Ssam maxrssi[i] = rssi; 615116742Ssam } 616140448Ssam IEEE80211_NODE_UNLOCK(nt); 617138568Ssam /* XXX select channel more intelligently */ 618138568Ssam bestchan = -1; 619116742Ssam for (i = 0; i < IEEE80211_CHAN_MAX; i++) 620138568Ssam if (isset(ic->ic_chan_active, i)) { 621138568Ssam /* 622138568Ssam * If the channel is unoccupied the max rssi 623138568Ssam * should be zero; just take it. Otherwise 624138568Ssam * track the channel with the lowest rssi and 625138568Ssam * use that when all channels appear occupied. 626138568Ssam */ 627138568Ssam if (maxrssi[i] == 0) { 628138568Ssam bestchan = i; 629116742Ssam break; 630138568Ssam } 631143715Ssam if (bestchan == -1 || 632143715Ssam maxrssi[i] < maxrssi[bestchan]) 633138568Ssam bestchan = i; 634138568Ssam } 635138568Ssam if (bestchan != -1) { 636138568Ssam ieee80211_create_ibss(ic, &ic->ic_channels[bestchan]); 637138568Ssam return; 638116742Ssam } 639138568Ssam /* no suitable channel, should not happen */ 640138568Ssam } 641138568Ssam 642138568Ssam /* 643138568Ssam * When manually sequencing the state machine; scan just once 644138568Ssam * regardless of whether we have a candidate or not. The 645138568Ssam * controlling application is expected to setup state and 646138568Ssam * initiate an association. 647138568Ssam */ 648138568Ssam if (ic->ic_roaming == IEEE80211_ROAMING_MANUAL) 649116742Ssam return; 650138568Ssam /* 651138568Ssam * Automatic sequencing; look for a candidate and 652138568Ssam * if found join the network. 653138568Ssam */ 654140448Ssam /* NB: unlocked read should be ok */ 655140448Ssam if (TAILQ_FIRST(&nt->nt_node) == NULL) { 656138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, 657138568Ssam "%s: no scan candidate\n", __func__); 658116742Ssam notfound: 659116742Ssam if (ic->ic_opmode == IEEE80211_M_IBSS && 660116742Ssam (ic->ic_flags & IEEE80211_F_IBSSON) && 661116742Ssam ic->ic_des_esslen != 0) { 662116742Ssam ieee80211_create_ibss(ic, ic->ic_ibss_chan); 663116742Ssam return; 664116742Ssam } 665116742Ssam /* 666116742Ssam * Reset the list of channels to scan and start again. 667116742Ssam */ 668138568Ssam ieee80211_reset_scan(ic); 669138568Ssam ic->ic_flags |= IEEE80211_F_SCAN; 670138568Ssam ieee80211_next_scan(ic); 671116742Ssam return; 672116742Ssam } 673116742Ssam selbs = NULL; 674138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, "\t%s\n", 675138568Ssam "macaddr bssid chan rssi rate flag wep essid"); 676140448Ssam IEEE80211_NODE_LOCK(nt); 677140448Ssam TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 678116742Ssam if (ni->ni_fails) { 679116742Ssam /* 680116742Ssam * The configuration of the access points may change 681116742Ssam * during my scan. So delete the entry for the AP 682116742Ssam * and retry to associate if there is another beacon. 683116742Ssam */ 684138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, 685138568Ssam "%s: skip scan candidate %s, fails %u\n", 686138568Ssam __func__, ether_sprintf(ni->ni_macaddr), 687138568Ssam ni->ni_fails); 688140448Ssam ni->ni_fails++; 689140448Ssam#if 0 690116742Ssam if (ni->ni_fails++ > 2) 691138568Ssam ieee80211_free_node(ni); 692140448Ssam#endif 693116742Ssam continue; 694116742Ssam } 695138568Ssam if (ieee80211_match_bss(ic, ni) == 0) { 696116742Ssam if (selbs == NULL) 697116742Ssam selbs = ni; 698140448Ssam else if (ieee80211_node_compare(ic, ni, selbs) > 0) 699116742Ssam selbs = ni; 700116742Ssam } 701116742Ssam } 702140448Ssam if (selbs != NULL) /* NB: grab ref while dropping lock */ 703140448Ssam (void) ieee80211_ref_node(selbs); 704140448Ssam IEEE80211_NODE_UNLOCK(nt); 705116742Ssam if (selbs == NULL) 706116742Ssam goto notfound; 707138568Ssam if (!ieee80211_sta_join(ic, selbs)) { 708140448Ssam ieee80211_free_node(selbs); 709138568Ssam goto notfound; 710138568Ssam } 711138568Ssam} 712138568Ssam 713138568Ssam/* 714138568Ssam * Handle 802.11 ad hoc network merge. The 715138568Ssam * convention, set by the Wireless Ethernet Compatibility Alliance 716138568Ssam * (WECA), is that an 802.11 station will change its BSSID to match 717138568Ssam * the "oldest" 802.11 ad hoc network, on the same channel, that 718138568Ssam * has the station's desired SSID. The "oldest" 802.11 network 719138568Ssam * sends beacons with the greatest TSF timestamp. 720138568Ssam * 721138568Ssam * The caller is assumed to validate TSF's before attempting a merge. 722138568Ssam * 723138568Ssam * Return !0 if the BSSID changed, 0 otherwise. 724138568Ssam */ 725138568Ssamint 726138568Ssamieee80211_ibss_merge(struct ieee80211com *ic, struct ieee80211_node *ni) 727138568Ssam{ 728138568Ssam 729140453Ssam if (ni == ic->ic_bss || 730140453Ssam IEEE80211_ADDR_EQ(ni->ni_bssid, ic->ic_bss->ni_bssid)) { 731138568Ssam /* unchanged, nothing to do */ 732138568Ssam return 0; 733138568Ssam } 734138568Ssam if (ieee80211_match_bss(ic, ni) != 0) { /* capabilities mismatch */ 735138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 736138568Ssam "%s: merge failed, capabilities mismatch\n", __func__); 737138568Ssam ic->ic_stats.is_ibss_capmismatch++; 738138568Ssam return 0; 739138568Ssam } 740138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 741138568Ssam "%s: new bssid %s: %s preamble, %s slot time%s\n", __func__, 742138568Ssam ether_sprintf(ni->ni_bssid), 743138568Ssam ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long", 744138568Ssam ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long", 745138568Ssam ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : "" 746138568Ssam ); 747140753Ssam return ieee80211_sta_join(ic, ieee80211_ref_node(ni)); 748138568Ssam} 749138568Ssam 750138568Ssam/* 751138568Ssam * Join the specified IBSS/BSS network. The node is assumed to 752138568Ssam * be passed in with a held reference. 753138568Ssam */ 754138568Ssamint 755138568Ssamieee80211_sta_join(struct ieee80211com *ic, struct ieee80211_node *selbs) 756138568Ssam{ 757138568Ssam struct ieee80211_node *obss; 758138568Ssam 759116742Ssam if (ic->ic_opmode == IEEE80211_M_IBSS) { 760140753Ssam struct ieee80211_node_table *nt; 761138568Ssam /* 762140440Ssam * Delete unusable rates; we've already checked 763140440Ssam * that the negotiated rate set is acceptable. 764138568Ssam */ 765140440Ssam ieee80211_fix_rate(ic, selbs, IEEE80211_F_DODEL); 766127772Ssam /* 767140753Ssam * Fillin the neighbor table; it will already 768139521Ssam * exist if we are simply switching mastership. 769140753Ssam * XXX ic_sta always setup so this is unnecessary? 770127772Ssam */ 771140753Ssam nt = &ic->ic_sta; 772140753Ssam IEEE80211_NODE_LOCK(nt); 773140753Ssam nt->nt_name = "neighbor"; 774140753Ssam nt->nt_inact_init = ic->ic_inact_run; 775140753Ssam IEEE80211_NODE_UNLOCK(nt); 776138568Ssam } 777138568Ssam 778138568Ssam /* 779138568Ssam * Committed to selbs, setup state. 780138568Ssam */ 781138568Ssam obss = ic->ic_bss; 782140753Ssam ic->ic_bss = selbs; /* NB: caller assumed to bump refcnt */ 783138568Ssam if (obss != NULL) 784138568Ssam ieee80211_free_node(obss); 785138568Ssam /* 786138568Ssam * Set the erp state (mostly the slot time) to deal with 787138568Ssam * the auto-select case; this should be redundant if the 788138568Ssam * mode is locked. 789138568Ssam */ 790138568Ssam ic->ic_curmode = ieee80211_chan2mode(ic, selbs->ni_chan); 791138568Ssam ieee80211_reset_erp(ic); 792138568Ssam ieee80211_wme_initparams(ic); 793140753Ssam 794140753Ssam if (ic->ic_opmode == IEEE80211_M_STA) 795140753Ssam ieee80211_new_state(ic, IEEE80211_S_AUTH, -1); 796140753Ssam else 797117811Ssam ieee80211_new_state(ic, IEEE80211_S_RUN, -1); 798138568Ssam return 1; 799116742Ssam} 800116742Ssam 801138568Ssam/* 802138568Ssam * Leave the specified IBSS/BSS network. The node is assumed to 803138568Ssam * be passed in with a held reference. 804138568Ssam */ 805138568Ssamvoid 806138568Ssamieee80211_sta_leave(struct ieee80211com *ic, struct ieee80211_node *ni) 807138568Ssam{ 808138568Ssam ic->ic_node_cleanup(ni); 809138568Ssam ieee80211_notify_node_leave(ic, ni); 810138568Ssam} 811138568Ssam 812116742Ssamstatic struct ieee80211_node * 813138568Ssamnode_alloc(struct ieee80211_node_table *nt) 814116742Ssam{ 815127768Ssam struct ieee80211_node *ni; 816138568Ssam 817127768Ssam MALLOC(ni, struct ieee80211_node *, sizeof(struct ieee80211_node), 818127768Ssam M_80211_NODE, M_NOWAIT | M_ZERO); 819127768Ssam return ni; 820116742Ssam} 821116742Ssam 822138568Ssam/* 823138568Ssam * Reclaim any resources in a node and reset any critical 824138568Ssam * state. Typically nodes are free'd immediately after, 825138568Ssam * but in some cases the storage may be reused so we need 826138568Ssam * to insure consistent state (should probably fix that). 827138568Ssam */ 828116742Ssamstatic void 829138568Ssamnode_cleanup(struct ieee80211_node *ni) 830116742Ssam{ 831138568Ssam#define N(a) (sizeof(a)/sizeof(a[0])) 832138568Ssam struct ieee80211com *ic = ni->ni_ic; 833138568Ssam int i, qlen; 834138568Ssam 835138568Ssam /* NB: preserve ni_table */ 836138568Ssam if (ni->ni_flags & IEEE80211_NODE_PWR_MGT) { 837138568Ssam ic->ic_ps_sta--; 838138568Ssam ni->ni_flags &= ~IEEE80211_NODE_PWR_MGT; 839138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_POWER, 840138568Ssam "[%s] power save mode off, %u sta's in ps mode\n", 841138568Ssam ether_sprintf(ni->ni_macaddr), ic->ic_ps_sta); 842138568Ssam } 843138568Ssam 844138568Ssam /* 845138568Ssam * Drain power save queue and, if needed, clear TIM. 846138568Ssam */ 847138568Ssam IEEE80211_NODE_SAVEQ_DRAIN(ni, qlen); 848138568Ssam if (qlen != 0 && ic->ic_set_tim != NULL) 849138568Ssam ic->ic_set_tim(ic, ni, 0); 850138568Ssam 851138568Ssam ni->ni_associd = 0; 852138568Ssam if (ni->ni_challenge != NULL) { 853138568Ssam FREE(ni->ni_challenge, M_DEVBUF); 854138568Ssam ni->ni_challenge = NULL; 855138568Ssam } 856138568Ssam /* 857138568Ssam * Preserve SSID, WPA, and WME ie's so the bss node is 858138568Ssam * reusable during a re-auth/re-assoc state transition. 859138568Ssam * If we remove these data they will not be recreated 860138568Ssam * because they come from a probe-response or beacon frame 861138568Ssam * which cannot be expected prior to the association-response. 862138568Ssam * This should not be an issue when operating in other modes 863138568Ssam * as stations leaving always go through a full state transition 864138568Ssam * which will rebuild this state. 865138568Ssam * 866138568Ssam * XXX does this leave us open to inheriting old state? 867138568Ssam */ 868138568Ssam for (i = 0; i < N(ni->ni_rxfrag); i++) 869138568Ssam if (ni->ni_rxfrag[i] != NULL) { 870138568Ssam m_freem(ni->ni_rxfrag[i]); 871138568Ssam ni->ni_rxfrag[i] = NULL; 872138568Ssam } 873138568Ssam ieee80211_crypto_delkey(ic, &ni->ni_ucastkey); 874138568Ssam#undef N 875116742Ssam} 876116742Ssam 877116742Ssamstatic void 878138568Ssamnode_free(struct ieee80211_node *ni) 879116742Ssam{ 880138568Ssam struct ieee80211com *ic = ni->ni_ic; 881138568Ssam 882138568Ssam ic->ic_node_cleanup(ni); 883138568Ssam if (ni->ni_wpa_ie != NULL) 884138568Ssam FREE(ni->ni_wpa_ie, M_DEVBUF); 885138568Ssam if (ni->ni_wme_ie != NULL) 886138568Ssam FREE(ni->ni_wme_ie, M_DEVBUF); 887138568Ssam IEEE80211_NODE_SAVEQ_DESTROY(ni); 888138568Ssam FREE(ni, M_80211_NODE); 889116742Ssam} 890116742Ssam 891120104Ssamstatic u_int8_t 892138568Ssamnode_getrssi(const struct ieee80211_node *ni) 893120104Ssam{ 894120104Ssam return ni->ni_rssi; 895120104Ssam} 896120104Ssam 897116742Ssamstatic void 898138568Ssamieee80211_setup_node(struct ieee80211_node_table *nt, 899138568Ssam struct ieee80211_node *ni, const u_int8_t *macaddr) 900116742Ssam{ 901138568Ssam struct ieee80211com *ic = nt->nt_ic; 902116742Ssam int hash; 903116742Ssam 904138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 905140766Ssam "%s %p<%s> in %s table\n", __func__, ni, 906138568Ssam ether_sprintf(macaddr), nt->nt_name); 907138568Ssam 908116742Ssam IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 909116742Ssam hash = IEEE80211_NODE_HASH(macaddr); 910138568Ssam ieee80211_node_initref(ni); /* mark referenced */ 911138568Ssam ni->ni_chan = IEEE80211_CHAN_ANYC; 912138568Ssam ni->ni_authmode = IEEE80211_AUTH_OPEN; 913138568Ssam ni->ni_txpower = ic->ic_txpowlimit; /* max power */ 914138568Ssam ieee80211_crypto_resetkey(ic, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE); 915139528Ssam ni->ni_inact_reload = nt->nt_inact_init; 916139528Ssam ni->ni_inact = ni->ni_inact_reload; 917138568Ssam IEEE80211_NODE_SAVEQ_INIT(ni, "unknown"); 918138568Ssam 919138568Ssam IEEE80211_NODE_LOCK(nt); 920138568Ssam TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list); 921138568Ssam LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash); 922138568Ssam ni->ni_table = nt; 923138568Ssam ni->ni_ic = ic; 924138568Ssam IEEE80211_NODE_UNLOCK(nt); 925116742Ssam} 926116742Ssam 927116742Ssamstruct ieee80211_node * 928138568Ssamieee80211_alloc_node(struct ieee80211_node_table *nt, const u_int8_t *macaddr) 929116742Ssam{ 930138568Ssam struct ieee80211com *ic = nt->nt_ic; 931138568Ssam struct ieee80211_node *ni; 932138568Ssam 933138568Ssam ni = ic->ic_node_alloc(nt); 934116742Ssam if (ni != NULL) 935138568Ssam ieee80211_setup_node(nt, ni, macaddr); 936127769Ssam else 937127769Ssam ic->ic_stats.is_rx_nodealloc++; 938116742Ssam return ni; 939116742Ssam} 940116742Ssam 941116742Ssamstruct ieee80211_node * 942138568Ssamieee80211_dup_bss(struct ieee80211_node_table *nt, const u_int8_t *macaddr) 943116742Ssam{ 944138568Ssam struct ieee80211com *ic = nt->nt_ic; 945138568Ssam struct ieee80211_node *ni; 946138568Ssam 947138568Ssam ni = ic->ic_node_alloc(nt); 948116742Ssam if (ni != NULL) { 949138568Ssam ieee80211_setup_node(nt, ni, macaddr); 950127770Ssam /* 951127770Ssam * Inherit from ic_bss. 952127770Ssam */ 953138568Ssam ni->ni_authmode = ic->ic_bss->ni_authmode; 954138568Ssam ni->ni_txpower = ic->ic_bss->ni_txpower; 955138568Ssam ni->ni_vlan = ic->ic_bss->ni_vlan; /* XXX?? */ 956127770Ssam IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_bss->ni_bssid); 957138568Ssam ieee80211_set_chan(ic, ni, ic->ic_bss->ni_chan); 958138568Ssam ni->ni_rsn = ic->ic_bss->ni_rsn; 959127770Ssam } else 960127770Ssam ic->ic_stats.is_rx_nodealloc++; 961116742Ssam return ni; 962116742Ssam} 963116742Ssam 964127772Ssamstatic struct ieee80211_node * 965138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 966138568Ssam_ieee80211_find_node_debug(struct ieee80211_node_table *nt, 967138568Ssam const u_int8_t *macaddr, const char *func, int line) 968138568Ssam#else 969138568Ssam_ieee80211_find_node(struct ieee80211_node_table *nt, 970138568Ssam const u_int8_t *macaddr) 971138568Ssam#endif 972116742Ssam{ 973116742Ssam struct ieee80211_node *ni; 974116742Ssam int hash; 975116742Ssam 976138568Ssam IEEE80211_NODE_LOCK_ASSERT(nt); 977127772Ssam 978116742Ssam hash = IEEE80211_NODE_HASH(macaddr); 979138568Ssam LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 980116742Ssam if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 981138568Ssam ieee80211_ref_node(ni); /* mark referenced */ 982138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 983138568Ssam IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE, 984140766Ssam "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 985140766Ssam func, line, 986140766Ssam ni, ether_sprintf(ni->ni_macaddr), 987140766Ssam ieee80211_node_refcnt(ni)); 988138568Ssam#endif 989127772Ssam return ni; 990116742Ssam } 991116742Ssam } 992127772Ssam return NULL; 993127772Ssam} 994138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 995138568Ssam#define _ieee80211_find_node(nt, mac) \ 996138568Ssam _ieee80211_find_node_debug(nt, mac, func, line) 997138568Ssam#endif 998127772Ssam 999127772Ssamstruct ieee80211_node * 1000138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1001138568Ssamieee80211_find_node_debug(struct ieee80211_node_table *nt, 1002138568Ssam const u_int8_t *macaddr, const char *func, int line) 1003138568Ssam#else 1004138568Ssamieee80211_find_node(struct ieee80211_node_table *nt, const u_int8_t *macaddr) 1005138568Ssam#endif 1006127772Ssam{ 1007127772Ssam struct ieee80211_node *ni; 1008127772Ssam 1009138568Ssam IEEE80211_NODE_LOCK(nt); 1010138568Ssam ni = _ieee80211_find_node(nt, macaddr); 1011138568Ssam IEEE80211_NODE_UNLOCK(nt); 1012116742Ssam return ni; 1013116742Ssam} 1014116742Ssam 1015116742Ssam/* 1016138568Ssam * Fake up a node; this handles node discovery in adhoc mode. 1017138568Ssam * Note that for the driver's benefit we we treat this like 1018138568Ssam * an association so the driver has an opportunity to setup 1019138568Ssam * it's private state. 1020138568Ssam */ 1021138568Ssamstruct ieee80211_node * 1022138568Ssamieee80211_fakeup_adhoc_node(struct ieee80211_node_table *nt, 1023138568Ssam const u_int8_t macaddr[IEEE80211_ADDR_LEN]) 1024138568Ssam{ 1025138568Ssam struct ieee80211com *ic = nt->nt_ic; 1026138568Ssam struct ieee80211_node *ni; 1027138568Ssam 1028138568Ssam ni = ieee80211_dup_bss(nt, macaddr); 1029138568Ssam if (ni != NULL) { 1030138568Ssam /* XXX no rate negotiation; just dup */ 1031138568Ssam ni->ni_rates = ic->ic_bss->ni_rates; 1032139524Ssam if (ic->ic_newassoc != NULL) 1033138568Ssam ic->ic_newassoc(ic, ni, 1); 1034138568Ssam /* XXX not right for 802.1x/WPA */ 1035138568Ssam ieee80211_node_authorize(ic, ni); 1036138568Ssam } 1037138568Ssam return ni; 1038138568Ssam} 1039138568Ssam 1040138568Ssam/* 1041138568Ssam * Locate the node for sender, track state, and then pass the 1042138568Ssam * (referenced) node up to the 802.11 layer for its use. We 1043138568Ssam * are required to pass some node so we fall back to ic_bss 1044138568Ssam * when this frame is from an unknown sender. The 802.11 layer 1045138568Ssam * knows this means the sender wasn't in the node table and 1046138568Ssam * acts accordingly. 1047138568Ssam */ 1048138568Ssamstruct ieee80211_node * 1049138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1050138568Ssamieee80211_find_rxnode_debug(struct ieee80211com *ic, 1051138568Ssam const struct ieee80211_frame_min *wh, const char *func, int line) 1052138568Ssam#else 1053138568Ssamieee80211_find_rxnode(struct ieee80211com *ic, 1054138568Ssam const struct ieee80211_frame_min *wh) 1055138568Ssam#endif 1056138568Ssam{ 1057138568Ssam#define IS_CTL(wh) \ 1058138568Ssam ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) == IEEE80211_FC0_TYPE_CTL) 1059138568Ssam#define IS_PSPOLL(wh) \ 1060138568Ssam ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == IEEE80211_FC0_SUBTYPE_PS_POLL) 1061138568Ssam struct ieee80211_node_table *nt; 1062138568Ssam struct ieee80211_node *ni; 1063138568Ssam 1064138568Ssam /* XXX may want scanned nodes in the neighbor table for adhoc */ 1065138568Ssam if (ic->ic_opmode == IEEE80211_M_STA || 1066138568Ssam ic->ic_opmode == IEEE80211_M_MONITOR || 1067138568Ssam (ic->ic_flags & IEEE80211_F_SCAN)) 1068138568Ssam nt = &ic->ic_scan; 1069138568Ssam else 1070140753Ssam nt = &ic->ic_sta; 1071138568Ssam /* XXX check ic_bss first in station mode */ 1072138568Ssam /* XXX 4-address frames? */ 1073138568Ssam IEEE80211_NODE_LOCK(nt); 1074138568Ssam if (IS_CTL(wh) && !IS_PSPOLL(wh) /*&& !IS_RTS(ah)*/) 1075138568Ssam ni = _ieee80211_find_node(nt, wh->i_addr1); 1076138568Ssam else 1077138568Ssam ni = _ieee80211_find_node(nt, wh->i_addr2); 1078138568Ssam IEEE80211_NODE_UNLOCK(nt); 1079138568Ssam 1080138568Ssam return (ni != NULL ? ni : ieee80211_ref_node(ic->ic_bss)); 1081138568Ssam#undef IS_PSPOLL 1082138568Ssam#undef IS_CTL 1083138568Ssam} 1084138568Ssam 1085138568Ssam/* 1086127772Ssam * Return a reference to the appropriate node for sending 1087127772Ssam * a data frame. This handles node discovery in adhoc networks. 1088127772Ssam */ 1089127772Ssamstruct ieee80211_node * 1090138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1091138568Ssamieee80211_find_txnode_debug(struct ieee80211com *ic, const u_int8_t *macaddr, 1092138568Ssam const char *func, int line) 1093138568Ssam#else 1094138568Ssamieee80211_find_txnode(struct ieee80211com *ic, const u_int8_t *macaddr) 1095138568Ssam#endif 1096127772Ssam{ 1097140753Ssam struct ieee80211_node_table *nt = &ic->ic_sta; 1098127772Ssam struct ieee80211_node *ni; 1099127772Ssam 1100127772Ssam /* 1101127772Ssam * The destination address should be in the node table 1102127772Ssam * unless we are operating in station mode or this is a 1103127772Ssam * multicast/broadcast frame. 1104127772Ssam */ 1105140753Ssam if (ic->ic_opmode == IEEE80211_M_STA || IEEE80211_IS_MULTICAST(macaddr)) 1106138568Ssam return ieee80211_ref_node(ic->ic_bss); 1107127772Ssam 1108127772Ssam /* XXX can't hold lock across dup_bss 'cuz of recursive locking */ 1109138568Ssam IEEE80211_NODE_LOCK(nt); 1110138568Ssam ni = _ieee80211_find_node(nt, macaddr); 1111138568Ssam IEEE80211_NODE_UNLOCK(nt); 1112138568Ssam 1113138568Ssam if (ni == NULL) { 1114138568Ssam if (ic->ic_opmode == IEEE80211_M_IBSS || 1115140497Ssam ic->ic_opmode == IEEE80211_M_AHDEMO) { 1116140497Ssam /* 1117140497Ssam * In adhoc mode cons up a node for the destination. 1118140497Ssam * Note that we need an additional reference for the 1119140497Ssam * caller to be consistent with _ieee80211_find_node. 1120140497Ssam */ 1121138568Ssam ni = ieee80211_fakeup_adhoc_node(nt, macaddr); 1122140497Ssam if (ni != NULL) 1123140497Ssam (void) ieee80211_ref_node(ni); 1124140497Ssam } else { 1125138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_OUTPUT, 1126138568Ssam "[%s] no node, discard frame (%s)\n", 1127138568Ssam ether_sprintf(macaddr), __func__); 1128138568Ssam ic->ic_stats.is_tx_nonode++; 1129127772Ssam } 1130127772Ssam } 1131127772Ssam return ni; 1132127772Ssam} 1133127772Ssam 1134127772Ssam/* 1135116742Ssam * Like find but search based on the channel too. 1136116742Ssam */ 1137116742Ssamstruct ieee80211_node * 1138138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1139138568Ssamieee80211_find_node_with_channel_debug(struct ieee80211_node_table *nt, 1140138568Ssam const u_int8_t *macaddr, struct ieee80211_channel *chan, 1141138568Ssam const char *func, int line) 1142138568Ssam#else 1143138568Ssamieee80211_find_node_with_channel(struct ieee80211_node_table *nt, 1144138568Ssam const u_int8_t *macaddr, struct ieee80211_channel *chan) 1145138568Ssam#endif 1146116742Ssam{ 1147116742Ssam struct ieee80211_node *ni; 1148116742Ssam int hash; 1149116742Ssam 1150116742Ssam hash = IEEE80211_NODE_HASH(macaddr); 1151138568Ssam IEEE80211_NODE_LOCK(nt); 1152138568Ssam LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1153127772Ssam if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr) && 1154127772Ssam ni->ni_chan == chan) { 1155138568Ssam ieee80211_ref_node(ni); /* mark referenced */ 1156138568Ssam IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE, 1157138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1158140766Ssam "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1159140766Ssam func, line, 1160138568Ssam#else 1161140766Ssam "%s %p<%s> refcnt %d\n", __func__, 1162138568Ssam#endif 1163140766Ssam ni, ether_sprintf(ni->ni_macaddr), 1164140766Ssam ieee80211_node_refcnt(ni)); 1165116742Ssam break; 1166116742Ssam } 1167116742Ssam } 1168138568Ssam IEEE80211_NODE_UNLOCK(nt); 1169116742Ssam return ni; 1170116742Ssam} 1171116742Ssam 1172138568Ssam/* 1173138568Ssam * Like find but search based on the ssid too. 1174138568Ssam */ 1175138568Ssamstruct ieee80211_node * 1176138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1177138568Ssamieee80211_find_node_with_ssid_debug(struct ieee80211_node_table *nt, 1178138568Ssam const u_int8_t *macaddr, u_int ssidlen, const u_int8_t *ssid, 1179138568Ssam const char *func, int line) 1180138568Ssam#else 1181138568Ssamieee80211_find_node_with_ssid(struct ieee80211_node_table *nt, 1182138568Ssam const u_int8_t *macaddr, u_int ssidlen, const u_int8_t *ssid) 1183138568Ssam#endif 1184138568Ssam{ 1185138568Ssam struct ieee80211com *ic = nt->nt_ic; 1186138568Ssam struct ieee80211_node *ni; 1187138568Ssam int hash; 1188138568Ssam 1189138568Ssam hash = IEEE80211_NODE_HASH(macaddr); 1190138568Ssam IEEE80211_NODE_LOCK(nt); 1191138568Ssam LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1192138568Ssam if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr) && 1193138568Ssam ni->ni_esslen == ic->ic_des_esslen && 1194138568Ssam memcmp(ni->ni_essid, ic->ic_des_essid, ni->ni_esslen) == 0) { 1195138568Ssam ieee80211_ref_node(ni); /* mark referenced */ 1196138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1197138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1198140766Ssam "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1199140766Ssam func, line, 1200138568Ssam#else 1201140766Ssam "%s %p<%s> refcnt %d\n", __func__, 1202138568Ssam#endif 1203140766Ssam ni, ether_sprintf(ni->ni_macaddr), 1204138568Ssam ieee80211_node_refcnt(ni)); 1205138568Ssam break; 1206138568Ssam } 1207138568Ssam } 1208138568Ssam IEEE80211_NODE_UNLOCK(nt); 1209138568Ssam return ni; 1210138568Ssam} 1211138568Ssam 1212116742Ssamstatic void 1213138568Ssam_ieee80211_free_node(struct ieee80211_node *ni) 1214116742Ssam{ 1215138568Ssam struct ieee80211com *ic = ni->ni_ic; 1216138568Ssam struct ieee80211_node_table *nt = ni->ni_table; 1217119150Ssam 1218138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1219140766Ssam "%s %p<%s> in %s table\n", __func__, ni, 1220140766Ssam ether_sprintf(ni->ni_macaddr), 1221138568Ssam nt != NULL ? nt->nt_name : "<gone>"); 1222138568Ssam 1223138568Ssam IEEE80211_AID_CLR(ni->ni_associd, ic->ic_aid_bitmap); 1224138568Ssam if (nt != NULL) { 1225138568Ssam TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1226138568Ssam LIST_REMOVE(ni, ni_hash); 1227138568Ssam } 1228138568Ssam ic->ic_node_free(ni); 1229116742Ssam} 1230116742Ssam 1231116742Ssamvoid 1232138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1233138568Ssamieee80211_free_node_debug(struct ieee80211_node *ni, const char *func, int line) 1234138568Ssam#else 1235138568Ssamieee80211_free_node(struct ieee80211_node *ni) 1236138568Ssam#endif 1237116742Ssam{ 1238138568Ssam struct ieee80211_node_table *nt = ni->ni_table; 1239119150Ssam 1240138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1241140454Ssam IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE, 1242140766Ssam "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni, 1243138568Ssam ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1); 1244138568Ssam#endif 1245138568Ssam if (ieee80211_node_dectestref(ni)) { 1246138568Ssam /* 1247138568Ssam * Beware; if the node is marked gone then it's already 1248138568Ssam * been removed from the table and we cannot assume the 1249138568Ssam * table still exists. Regardless, there's no need to lock 1250138568Ssam * the table. 1251138568Ssam */ 1252138568Ssam if (ni->ni_table != NULL) { 1253138568Ssam IEEE80211_NODE_LOCK(nt); 1254138568Ssam _ieee80211_free_node(ni); 1255138568Ssam IEEE80211_NODE_UNLOCK(nt); 1256138568Ssam } else 1257138568Ssam _ieee80211_free_node(ni); 1258116742Ssam } 1259116742Ssam} 1260116742Ssam 1261138568Ssam/* 1262138568Ssam * Reclaim a node. If this is the last reference count then 1263138568Ssam * do the normal free work. Otherwise remove it from the node 1264138568Ssam * table and mark it gone by clearing the back-reference. 1265138568Ssam */ 1266138568Ssamstatic void 1267138568Ssamnode_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 1268116742Ssam{ 1269138568Ssam 1270140766Ssam IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE, 1271140766Ssam "%s: remove %p<%s> from %s table, refcnt %d\n", 1272140766Ssam __func__, ni, ether_sprintf(ni->ni_macaddr), 1273140766Ssam nt->nt_name, ieee80211_node_refcnt(ni)-1); 1274138568Ssam if (!ieee80211_node_dectestref(ni)) { 1275138568Ssam /* 1276138568Ssam * Other references are present, just remove the 1277138568Ssam * node from the table so it cannot be found. When 1278138568Ssam * the references are dropped storage will be 1279140753Ssam * reclaimed. 1280138568Ssam */ 1281138568Ssam TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1282138568Ssam LIST_REMOVE(ni, ni_hash); 1283138568Ssam ni->ni_table = NULL; /* clear reference */ 1284138568Ssam } else 1285138568Ssam _ieee80211_free_node(ni); 1286138568Ssam} 1287138568Ssam 1288138568Ssamstatic void 1289138568Ssamieee80211_free_allnodes_locked(struct ieee80211_node_table *nt) 1290138568Ssam{ 1291138568Ssam struct ieee80211com *ic = nt->nt_ic; 1292116742Ssam struct ieee80211_node *ni; 1293116742Ssam 1294138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1295138568Ssam "%s: free all nodes in %s table\n", __func__, nt->nt_name); 1296138568Ssam 1297138568Ssam while ((ni = TAILQ_FIRST(&nt->nt_node)) != NULL) { 1298138568Ssam if (ni->ni_associd != 0) { 1299138568Ssam if (ic->ic_auth->ia_node_leave != NULL) 1300138568Ssam ic->ic_auth->ia_node_leave(ic, ni); 1301138568Ssam IEEE80211_AID_CLR(ni->ni_associd, ic->ic_aid_bitmap); 1302138568Ssam } 1303138568Ssam node_reclaim(nt, ni); 1304138568Ssam } 1305138568Ssam ieee80211_reset_erp(ic); 1306116742Ssam} 1307116742Ssam 1308138568Ssamstatic void 1309138568Ssamieee80211_free_allnodes(struct ieee80211_node_table *nt) 1310138568Ssam{ 1311138568Ssam 1312138568Ssam IEEE80211_NODE_LOCK(nt); 1313138568Ssam ieee80211_free_allnodes_locked(nt); 1314138568Ssam IEEE80211_NODE_UNLOCK(nt); 1315138568Ssam} 1316138568Ssam 1317120483Ssam/* 1318138568Ssam * Timeout entries in the scan cache. 1319138568Ssam */ 1320138568Ssamstatic void 1321138568Ssamieee80211_timeout_scan_candidates(struct ieee80211_node_table *nt) 1322138568Ssam{ 1323138568Ssam struct ieee80211com *ic = nt->nt_ic; 1324138568Ssam struct ieee80211_node *ni, *tni; 1325138568Ssam 1326138568Ssam IEEE80211_NODE_LOCK(nt); 1327138568Ssam ni = ic->ic_bss; 1328138568Ssam /* XXX belongs elsewhere */ 1329138568Ssam if (ni->ni_rxfrag[0] != NULL && ticks > ni->ni_rxfragstamp + hz) { 1330138568Ssam m_freem(ni->ni_rxfrag[0]); 1331138568Ssam ni->ni_rxfrag[0] = NULL; 1332138568Ssam } 1333138568Ssam TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, tni) { 1334138568Ssam if (ni->ni_inact && --ni->ni_inact == 0) { 1335138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1336138568Ssam "[%s] scan candidate purged from cache " 1337138568Ssam "(refcnt %u)\n", ether_sprintf(ni->ni_macaddr), 1338140766Ssam ieee80211_node_refcnt(ni)); 1339138568Ssam node_reclaim(nt, ni); 1340138568Ssam } 1341138568Ssam } 1342138568Ssam IEEE80211_NODE_UNLOCK(nt); 1343138568Ssam 1344138568Ssam nt->nt_inact_timer = IEEE80211_INACT_WAIT; 1345138568Ssam} 1346138568Ssam 1347138568Ssam/* 1348138568Ssam * Timeout inactive stations and do related housekeeping. 1349138568Ssam * Note that we cannot hold the node lock while sending a 1350138568Ssam * frame as this would lead to a LOR. Instead we use a 1351138568Ssam * generation number to mark nodes that we've scanned and 1352138568Ssam * drop the lock and restart a scan if we have to time out 1353138568Ssam * a node. Since we are single-threaded by virtue of 1354120483Ssam * controlling the inactivity timer we can be sure this will 1355120483Ssam * process each node only once. 1356120483Ssam */ 1357138568Ssamstatic void 1358138568Ssamieee80211_timeout_stations(struct ieee80211_node_table *nt) 1359116742Ssam{ 1360138568Ssam struct ieee80211com *ic = nt->nt_ic; 1361120483Ssam struct ieee80211_node *ni; 1362138568Ssam u_int gen; 1363116742Ssam 1364138568Ssam IEEE80211_SCAN_LOCK(nt); 1365138568Ssam gen = nt->nt_scangen++; 1366138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1367140766Ssam "%s: %s scangen %u\n", __func__, nt->nt_name, gen); 1368120483Ssamrestart: 1369138568Ssam IEEE80211_NODE_LOCK(nt); 1370138568Ssam TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 1371120483Ssam if (ni->ni_scangen == gen) /* previously handled */ 1372120483Ssam continue; 1373120483Ssam ni->ni_scangen = gen; 1374138568Ssam /* 1375138568Ssam * Free fragment if not needed anymore 1376138568Ssam * (last fragment older than 1s). 1377138568Ssam * XXX doesn't belong here 1378138568Ssam */ 1379138568Ssam if (ni->ni_rxfrag[0] != NULL && 1380138568Ssam ticks > ni->ni_rxfragstamp + hz) { 1381138568Ssam m_freem(ni->ni_rxfrag[0]); 1382138568Ssam ni->ni_rxfrag[0] = NULL; 1383138568Ssam } 1384140498Ssam /* 1385140498Ssam * Special case ourself; we may be idle for extended periods 1386140498Ssam * of time and regardless reclaiming our state is wrong. 1387140498Ssam */ 1388140498Ssam if (ni == ic->ic_bss) 1389140498Ssam continue; 1390138568Ssam ni->ni_inact--; 1391138568Ssam if (ni->ni_associd != 0) { 1392119150Ssam /* 1393138568Ssam * Age frames on the power save queue. The 1394138568Ssam * aging interval is 4 times the listen 1395138568Ssam * interval specified by the station. This 1396138568Ssam * number is factored into the age calculations 1397138568Ssam * when the frame is placed on the queue. We 1398138568Ssam * store ages as time differences we can check 1399138568Ssam * and/or adjust only the head of the list. 1400138568Ssam */ 1401138568Ssam if (IEEE80211_NODE_SAVEQ_QLEN(ni) != 0) { 1402138568Ssam struct mbuf *m; 1403138568Ssam int discard = 0; 1404138568Ssam 1405138568Ssam IEEE80211_NODE_SAVEQ_LOCK(ni); 1406138568Ssam while (IF_POLL(&ni->ni_savedq, m) != NULL && 1407138568Ssam M_AGE_GET(m) < IEEE80211_INACT_WAIT) { 1408138568SsamIEEE80211_DPRINTF(ic, IEEE80211_MSG_POWER, "[%s] discard frame, age %u\n", ether_sprintf(ni->ni_macaddr), M_AGE_GET(m));/*XXX*/ 1409138568Ssam _IEEE80211_NODE_SAVEQ_DEQUEUE_HEAD(ni, m); 1410138568Ssam m_freem(m); 1411138568Ssam discard++; 1412138568Ssam } 1413138568Ssam if (m != NULL) 1414138568Ssam M_AGE_SUB(m, IEEE80211_INACT_WAIT); 1415138568Ssam IEEE80211_NODE_SAVEQ_UNLOCK(ni); 1416138568Ssam 1417138568Ssam if (discard != 0) { 1418138568Ssam IEEE80211_DPRINTF(ic, 1419138568Ssam IEEE80211_MSG_POWER, 1420138568Ssam "[%s] discard %u frames for age\n", 1421138568Ssam ether_sprintf(ni->ni_macaddr), 1422138568Ssam discard); 1423138568Ssam IEEE80211_NODE_STAT_ADD(ni, 1424138568Ssam ps_discard, discard); 1425138568Ssam if (IEEE80211_NODE_SAVEQ_QLEN(ni) == 0) 1426138568Ssam ic->ic_set_tim(ic, ni, 0); 1427138568Ssam } 1428138568Ssam } 1429138568Ssam /* 1430138568Ssam * Probe the station before time it out. We 1431138568Ssam * send a null data frame which may not be 1432138568Ssam * universally supported by drivers (need it 1433138568Ssam * for ps-poll support so it should be...). 1434138568Ssam */ 1435139528Ssam if (0 < ni->ni_inact && 1436139528Ssam ni->ni_inact <= ic->ic_inact_probe) { 1437138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1438138568Ssam "[%s] probe station due to inactivity\n", 1439138568Ssam ether_sprintf(ni->ni_macaddr)); 1440138568Ssam IEEE80211_NODE_UNLOCK(nt); 1441138568Ssam ieee80211_send_nulldata(ic, ni); 1442138568Ssam /* XXX stat? */ 1443138568Ssam goto restart; 1444138568Ssam } 1445138568Ssam } 1446138568Ssam if (ni->ni_inact <= 0) { 1447138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1448138568Ssam "[%s] station timed out due to inactivity " 1449138568Ssam "(refcnt %u)\n", ether_sprintf(ni->ni_macaddr), 1450138568Ssam ieee80211_node_refcnt(ni)); 1451138568Ssam /* 1452138568Ssam * Send a deauthenticate frame and drop the station. 1453138568Ssam * This is somewhat complicated due to reference counts 1454138568Ssam * and locking. At this point a station will typically 1455138568Ssam * have a reference count of 1. ieee80211_node_leave 1456138568Ssam * will do a "free" of the node which will drop the 1457138568Ssam * reference count. But in the meantime a reference 1458138568Ssam * wil be held by the deauth frame. The actual reclaim 1459138568Ssam * of the node will happen either after the tx is 1460138568Ssam * completed or by ieee80211_node_leave. 1461120483Ssam * 1462138568Ssam * Separately we must drop the node lock before sending 1463138568Ssam * in case the driver takes a lock, as this will result 1464138568Ssam * in LOR between the node lock and the driver lock. 1465119150Ssam */ 1466138568Ssam IEEE80211_NODE_UNLOCK(nt); 1467138568Ssam if (ni->ni_associd != 0) { 1468138568Ssam IEEE80211_SEND_MGMT(ic, ni, 1469138568Ssam IEEE80211_FC0_SUBTYPE_DEAUTH, 1470138568Ssam IEEE80211_REASON_AUTH_EXPIRE); 1471138568Ssam } 1472138568Ssam ieee80211_node_leave(ic, ni); 1473121180Ssam ic->ic_stats.is_node_timeout++; 1474120483Ssam goto restart; 1475120483Ssam } 1476116742Ssam } 1477138568Ssam IEEE80211_NODE_UNLOCK(nt); 1478138568Ssam 1479138568Ssam IEEE80211_SCAN_UNLOCK(nt); 1480138568Ssam 1481138568Ssam nt->nt_inact_timer = IEEE80211_INACT_WAIT; 1482116742Ssam} 1483116742Ssam 1484116742Ssamvoid 1485138568Ssamieee80211_iterate_nodes(struct ieee80211_node_table *nt, ieee80211_iter_func *f, void *arg) 1486116742Ssam{ 1487116742Ssam struct ieee80211_node *ni; 1488138568Ssam u_int gen; 1489116742Ssam 1490138568Ssam IEEE80211_SCAN_LOCK(nt); 1491138568Ssam gen = nt->nt_scangen++; 1492138568Ssamrestart: 1493138568Ssam IEEE80211_NODE_LOCK(nt); 1494138568Ssam TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 1495138568Ssam if (ni->ni_scangen != gen) { 1496138568Ssam ni->ni_scangen = gen; 1497138568Ssam (void) ieee80211_ref_node(ni); 1498138568Ssam IEEE80211_NODE_UNLOCK(nt); 1499138568Ssam (*f)(arg, ni); 1500138568Ssam ieee80211_free_node(ni); 1501138568Ssam goto restart; 1502138568Ssam } 1503138568Ssam } 1504138568Ssam IEEE80211_NODE_UNLOCK(nt); 1505138568Ssam 1506138568Ssam IEEE80211_SCAN_UNLOCK(nt); 1507116742Ssam} 1508138568Ssam 1509138568Ssamvoid 1510138568Ssamieee80211_dump_node(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 1511138568Ssam{ 1512138568Ssam printf("0x%p: mac %s refcnt %d\n", ni, 1513138568Ssam ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)); 1514138568Ssam printf("\tscangen %u authmode %u flags 0x%x\n", 1515138568Ssam ni->ni_scangen, ni->ni_authmode, ni->ni_flags); 1516138568Ssam printf("\tassocid 0x%x txpower %u vlan %u\n", 1517138568Ssam ni->ni_associd, ni->ni_txpower, ni->ni_vlan); 1518138568Ssam printf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n", 1519138568Ssam ni->ni_txseqs[0], 1520138568Ssam ni->ni_rxseqs[0] >> IEEE80211_SEQ_SEQ_SHIFT, 1521138568Ssam ni->ni_rxseqs[0] & IEEE80211_SEQ_FRAG_MASK, 1522138568Ssam ni->ni_rxfragstamp); 1523138568Ssam printf("\trstamp %u rssi %u intval %u capinfo 0x%x\n", 1524138568Ssam ni->ni_rstamp, ni->ni_rssi, ni->ni_intval, ni->ni_capinfo); 1525138568Ssam printf("\tbssid %s essid \"%.*s\" channel %u:0x%x\n", 1526138568Ssam ether_sprintf(ni->ni_bssid), 1527138568Ssam ni->ni_esslen, ni->ni_essid, 1528138568Ssam ni->ni_chan->ic_freq, ni->ni_chan->ic_flags); 1529138568Ssam printf("\tfails %u inact %u txrate %u\n", 1530138568Ssam ni->ni_fails, ni->ni_inact, ni->ni_txrate); 1531138568Ssam} 1532138568Ssam 1533138568Ssamvoid 1534138568Ssamieee80211_dump_nodes(struct ieee80211_node_table *nt) 1535138568Ssam{ 1536138568Ssam ieee80211_iterate_nodes(nt, 1537138568Ssam (ieee80211_iter_func *) ieee80211_dump_node, nt); 1538138568Ssam} 1539138568Ssam 1540138568Ssam/* 1541138568Ssam * Handle a station joining an 11g network. 1542138568Ssam */ 1543138568Ssamstatic void 1544138568Ssamieee80211_node_join_11g(struct ieee80211com *ic, struct ieee80211_node *ni) 1545138568Ssam{ 1546138568Ssam 1547138568Ssam /* 1548138568Ssam * Station isn't capable of short slot time. Bump 1549138568Ssam * the count of long slot time stations and disable 1550138568Ssam * use of short slot time. Note that the actual switch 1551138568Ssam * over to long slot time use may not occur until the 1552138568Ssam * next beacon transmission (per sec. 7.3.1.4 of 11g). 1553138568Ssam */ 1554138568Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 1555138568Ssam ic->ic_longslotsta++; 1556138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1557138568Ssam "[%s] station needs long slot time, count %d\n", 1558138568Ssam ether_sprintf(ni->ni_macaddr), ic->ic_longslotsta); 1559138568Ssam /* XXX vap's w/ conflicting needs won't work */ 1560138568Ssam ieee80211_set_shortslottime(ic, 0); 1561138568Ssam } 1562138568Ssam /* 1563138568Ssam * If the new station is not an ERP station 1564138568Ssam * then bump the counter and enable protection 1565138568Ssam * if configured. 1566138568Ssam */ 1567138568Ssam if (!ieee80211_iserp_rateset(ic, &ni->ni_rates)) { 1568138568Ssam ic->ic_nonerpsta++; 1569138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1570138568Ssam "[%s] station is !ERP, %d non-ERP stations associated\n", 1571138568Ssam ether_sprintf(ni->ni_macaddr), ic->ic_nonerpsta); 1572138568Ssam /* 1573138568Ssam * If protection is configured, enable it. 1574138568Ssam */ 1575138568Ssam if (ic->ic_protmode != IEEE80211_PROT_NONE) { 1576138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1577138568Ssam "%s: enable use of protection\n", __func__); 1578138568Ssam ic->ic_flags |= IEEE80211_F_USEPROT; 1579138568Ssam } 1580138568Ssam /* 1581138568Ssam * If station does not support short preamble 1582138568Ssam * then we must enable use of Barker preamble. 1583138568Ssam */ 1584138568Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) { 1585138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1586138568Ssam "[%s] station needs long preamble\n", 1587138568Ssam ether_sprintf(ni->ni_macaddr)); 1588138568Ssam ic->ic_flags |= IEEE80211_F_USEBARKER; 1589138568Ssam ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; 1590138568Ssam } 1591138568Ssam } else 1592138568Ssam ni->ni_flags |= IEEE80211_NODE_ERP; 1593138568Ssam} 1594138568Ssam 1595138568Ssamvoid 1596138568Ssamieee80211_node_join(struct ieee80211com *ic, struct ieee80211_node *ni, int resp) 1597138568Ssam{ 1598138568Ssam int newassoc; 1599138568Ssam 1600138568Ssam if (ni->ni_associd == 0) { 1601138568Ssam u_int16_t aid; 1602138568Ssam 1603138568Ssam /* 1604138568Ssam * It would be good to search the bitmap 1605138568Ssam * more efficiently, but this will do for now. 1606138568Ssam */ 1607138568Ssam for (aid = 1; aid < ic->ic_max_aid; aid++) { 1608138568Ssam if (!IEEE80211_AID_ISSET(aid, 1609138568Ssam ic->ic_aid_bitmap)) 1610138568Ssam break; 1611138568Ssam } 1612138568Ssam if (aid >= ic->ic_max_aid) { 1613138568Ssam IEEE80211_SEND_MGMT(ic, ni, resp, 1614138568Ssam IEEE80211_REASON_ASSOC_TOOMANY); 1615138568Ssam ieee80211_node_leave(ic, ni); 1616138568Ssam return; 1617138568Ssam } 1618138568Ssam ni->ni_associd = aid | 0xc000; 1619138568Ssam IEEE80211_AID_SET(ni->ni_associd, ic->ic_aid_bitmap); 1620138568Ssam ic->ic_sta_assoc++; 1621138568Ssam newassoc = 1; 1622139522Ssam if (ic->ic_curmode == IEEE80211_MODE_11G || 1623139522Ssam ic->ic_curmode == IEEE80211_MODE_TURBO_G) 1624138568Ssam ieee80211_node_join_11g(ic, ni); 1625138568Ssam } else 1626138568Ssam newassoc = 0; 1627138568Ssam 1628138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, 1629139523Ssam "[%s] station %sassociated at aid %d: %s preamble, %s slot time%s%s\n", 1630139523Ssam ether_sprintf(ni->ni_macaddr), newassoc ? "" : "re", 1631139523Ssam IEEE80211_NODE_AID(ni), 1632139523Ssam ic->ic_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long", 1633139523Ssam ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long", 1634139523Ssam ic->ic_flags & IEEE80211_F_USEPROT ? ", protection" : "", 1635139523Ssam ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "" 1636139523Ssam ); 1637138568Ssam 1638138568Ssam /* give driver a chance to setup state like ni_txrate */ 1639139524Ssam if (ic->ic_newassoc != NULL) 1640138568Ssam ic->ic_newassoc(ic, ni, newassoc); 1641139528Ssam ni->ni_inact_reload = ic->ic_inact_auth; 1642139528Ssam ni->ni_inact = ni->ni_inact_reload; 1643138568Ssam IEEE80211_SEND_MGMT(ic, ni, resp, IEEE80211_STATUS_SUCCESS); 1644138568Ssam /* tell the authenticator about new station */ 1645138568Ssam if (ic->ic_auth->ia_node_join != NULL) 1646138568Ssam ic->ic_auth->ia_node_join(ic, ni); 1647138568Ssam ieee80211_notify_node_join(ic, ni, newassoc); 1648138568Ssam} 1649138568Ssam 1650138568Ssam/* 1651138568Ssam * Handle a station leaving an 11g network. 1652138568Ssam */ 1653138568Ssamstatic void 1654138568Ssamieee80211_node_leave_11g(struct ieee80211com *ic, struct ieee80211_node *ni) 1655138568Ssam{ 1656138568Ssam 1657139522Ssam KASSERT(ic->ic_curmode == IEEE80211_MODE_11G || 1658139522Ssam ic->ic_curmode == IEEE80211_MODE_TURBO_G, 1659138568Ssam ("not in 11g, curmode %x", ic->ic_curmode)); 1660138568Ssam 1661138568Ssam /* 1662138568Ssam * If a long slot station do the slot time bookkeeping. 1663138568Ssam */ 1664138568Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 1665138568Ssam KASSERT(ic->ic_longslotsta > 0, 1666138568Ssam ("bogus long slot station count %d", ic->ic_longslotsta)); 1667138568Ssam ic->ic_longslotsta--; 1668138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1669138568Ssam "[%s] long slot time station leaves, count now %d\n", 1670138568Ssam ether_sprintf(ni->ni_macaddr), ic->ic_longslotsta); 1671138568Ssam if (ic->ic_longslotsta == 0) { 1672138568Ssam /* 1673138568Ssam * Re-enable use of short slot time if supported 1674138568Ssam * and not operating in IBSS mode (per spec). 1675138568Ssam */ 1676138568Ssam if ((ic->ic_caps & IEEE80211_C_SHSLOT) && 1677138568Ssam ic->ic_opmode != IEEE80211_M_IBSS) { 1678138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1679138568Ssam "%s: re-enable use of short slot time\n", 1680138568Ssam __func__); 1681138568Ssam ieee80211_set_shortslottime(ic, 1); 1682138568Ssam } 1683138568Ssam } 1684138568Ssam } 1685138568Ssam /* 1686138568Ssam * If a non-ERP station do the protection-related bookkeeping. 1687138568Ssam */ 1688138568Ssam if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) { 1689138568Ssam KASSERT(ic->ic_nonerpsta > 0, 1690138568Ssam ("bogus non-ERP station count %d", ic->ic_nonerpsta)); 1691138568Ssam ic->ic_nonerpsta--; 1692138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1693138568Ssam "[%s] non-ERP station leaves, count now %d\n", 1694138568Ssam ether_sprintf(ni->ni_macaddr), ic->ic_nonerpsta); 1695138568Ssam if (ic->ic_nonerpsta == 0) { 1696138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1697138568Ssam "%s: disable use of protection\n", __func__); 1698138568Ssam ic->ic_flags &= ~IEEE80211_F_USEPROT; 1699138568Ssam /* XXX verify mode? */ 1700138568Ssam if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) { 1701138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1702138568Ssam "%s: re-enable use of short preamble\n", 1703138568Ssam __func__); 1704138568Ssam ic->ic_flags |= IEEE80211_F_SHPREAMBLE; 1705138568Ssam ic->ic_flags &= ~IEEE80211_F_USEBARKER; 1706138568Ssam } 1707138568Ssam } 1708138568Ssam } 1709138568Ssam} 1710138568Ssam 1711138568Ssam/* 1712138568Ssam * Handle bookkeeping for station deauthentication/disassociation 1713138568Ssam * when operating as an ap. 1714138568Ssam */ 1715138568Ssamvoid 1716138568Ssamieee80211_node_leave(struct ieee80211com *ic, struct ieee80211_node *ni) 1717138568Ssam{ 1718140499Ssam struct ieee80211_node_table *nt = ni->ni_table; 1719138568Ssam 1720138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, 1721138568Ssam "[%s] station with aid %d leaves\n", 1722138568Ssam ether_sprintf(ni->ni_macaddr), IEEE80211_NODE_AID(ni)); 1723138568Ssam 1724138568Ssam KASSERT(ic->ic_opmode == IEEE80211_M_HOSTAP || 1725138568Ssam ic->ic_opmode == IEEE80211_M_IBSS || 1726138568Ssam ic->ic_opmode == IEEE80211_M_AHDEMO, 1727138568Ssam ("unexpected operating mode %u", ic->ic_opmode)); 1728138568Ssam /* 1729138568Ssam * If node wasn't previously associated all 1730138568Ssam * we need to do is reclaim the reference. 1731138568Ssam */ 1732138568Ssam /* XXX ibss mode bypasses 11g and notification */ 1733138568Ssam if (ni->ni_associd == 0) 1734138568Ssam goto done; 1735138568Ssam /* 1736138568Ssam * Tell the authenticator the station is leaving. 1737138568Ssam * Note that we must do this before yanking the 1738138568Ssam * association id as the authenticator uses the 1739138568Ssam * associd to locate it's state block. 1740138568Ssam */ 1741138568Ssam if (ic->ic_auth->ia_node_leave != NULL) 1742138568Ssam ic->ic_auth->ia_node_leave(ic, ni); 1743138568Ssam IEEE80211_AID_CLR(ni->ni_associd, ic->ic_aid_bitmap); 1744138568Ssam ni->ni_associd = 0; 1745138568Ssam ic->ic_sta_assoc--; 1746138568Ssam 1747139522Ssam if (ic->ic_curmode == IEEE80211_MODE_11G || 1748139522Ssam ic->ic_curmode == IEEE80211_MODE_TURBO_G) 1749138568Ssam ieee80211_node_leave_11g(ic, ni); 1750138568Ssam /* 1751138568Ssam * Cleanup station state. In particular clear various 1752138568Ssam * state that might otherwise be reused if the node 1753138568Ssam * is reused before the reference count goes to zero 1754138568Ssam * (and memory is reclaimed). 1755138568Ssam */ 1756138568Ssam ieee80211_sta_leave(ic, ni); 1757138568Ssamdone: 1758140499Ssam /* 1759140499Ssam * Remove the node from any table it's recorded in and 1760140499Ssam * drop the caller's reference. Removal from the table 1761140499Ssam * is important to insure the node is not reprocessed 1762140499Ssam * for inactivity. 1763140499Ssam */ 1764140499Ssam if (nt != NULL) { 1765140499Ssam IEEE80211_NODE_LOCK(nt); 1766140499Ssam node_reclaim(nt, ni); 1767140499Ssam IEEE80211_NODE_UNLOCK(nt); 1768140499Ssam } else 1769140499Ssam ieee80211_free_node(ni); 1770138568Ssam} 1771138568Ssam 1772138568Ssamu_int8_t 1773138568Ssamieee80211_getrssi(struct ieee80211com *ic) 1774138568Ssam{ 1775138568Ssam#define NZ(x) ((x) == 0 ? 1 : (x)) 1776140753Ssam struct ieee80211_node_table *nt = &ic->ic_sta; 1777138568Ssam u_int32_t rssi_samples, rssi_total; 1778138568Ssam struct ieee80211_node *ni; 1779138568Ssam 1780138568Ssam rssi_total = 0; 1781138568Ssam rssi_samples = 0; 1782138568Ssam switch (ic->ic_opmode) { 1783138568Ssam case IEEE80211_M_IBSS: /* average of all ibss neighbors */ 1784138568Ssam /* XXX locking */ 1785140753Ssam TAILQ_FOREACH(ni, &nt->nt_node, ni_list) 1786138568Ssam if (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) { 1787138568Ssam rssi_samples++; 1788138568Ssam rssi_total += ic->ic_node_getrssi(ni); 1789138568Ssam } 1790138568Ssam break; 1791138568Ssam case IEEE80211_M_AHDEMO: /* average of all neighbors */ 1792138568Ssam /* XXX locking */ 1793140753Ssam TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 1794138568Ssam rssi_samples++; 1795138568Ssam rssi_total += ic->ic_node_getrssi(ni); 1796138568Ssam } 1797138568Ssam break; 1798138568Ssam case IEEE80211_M_HOSTAP: /* average of all associated stations */ 1799138568Ssam /* XXX locking */ 1800140753Ssam TAILQ_FOREACH(ni, &nt->nt_node, ni_list) 1801138568Ssam if (IEEE80211_AID(ni->ni_associd) != 0) { 1802138568Ssam rssi_samples++; 1803138568Ssam rssi_total += ic->ic_node_getrssi(ni); 1804138568Ssam } 1805138568Ssam break; 1806138568Ssam case IEEE80211_M_MONITOR: /* XXX */ 1807138568Ssam case IEEE80211_M_STA: /* use stats from associated ap */ 1808138568Ssam default: 1809138568Ssam if (ic->ic_bss != NULL) 1810138568Ssam rssi_total = ic->ic_node_getrssi(ic->ic_bss); 1811138568Ssam rssi_samples = 1; 1812138568Ssam break; 1813138568Ssam } 1814138568Ssam return rssi_total / NZ(rssi_samples); 1815138568Ssam#undef NZ 1816138568Ssam} 1817138568Ssam 1818138568Ssam/* 1819138568Ssam * Indicate whether there are frames queued for a station in power-save mode. 1820138568Ssam */ 1821138568Ssamstatic void 1822138568Ssamieee80211_set_tim(struct ieee80211com *ic, struct ieee80211_node *ni, int set) 1823138568Ssam{ 1824138568Ssam u_int16_t aid; 1825138568Ssam 1826138568Ssam KASSERT(ic->ic_opmode == IEEE80211_M_HOSTAP || 1827138568Ssam ic->ic_opmode == IEEE80211_M_IBSS, 1828138568Ssam ("operating mode %u", ic->ic_opmode)); 1829138568Ssam 1830138568Ssam aid = IEEE80211_AID(ni->ni_associd); 1831138568Ssam KASSERT(aid < ic->ic_max_aid, 1832138568Ssam ("bogus aid %u, max %u", aid, ic->ic_max_aid)); 1833138568Ssam 1834138568Ssam IEEE80211_BEACON_LOCK(ic); 1835138568Ssam if (set != (isset(ic->ic_tim_bitmap, aid) != 0)) { 1836138568Ssam if (set) { 1837138568Ssam setbit(ic->ic_tim_bitmap, aid); 1838138568Ssam ic->ic_ps_pending++; 1839138568Ssam } else { 1840138568Ssam clrbit(ic->ic_tim_bitmap, aid); 1841138568Ssam ic->ic_ps_pending--; 1842138568Ssam } 1843138568Ssam ic->ic_flags |= IEEE80211_F_TIMUPDATE; 1844138568Ssam } 1845138568Ssam IEEE80211_BEACON_UNLOCK(ic); 1846138568Ssam} 1847138568Ssam 1848138568Ssam/* 1849138568Ssam * Node table support. 1850138568Ssam */ 1851138568Ssam 1852138568Ssamstatic void 1853138568Ssamieee80211_node_table_init(struct ieee80211com *ic, 1854138568Ssam struct ieee80211_node_table *nt, 1855138568Ssam const char *name, int inact, 1856138568Ssam void (*timeout)(struct ieee80211_node_table *)) 1857138568Ssam{ 1858138568Ssam 1859138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1860138568Ssam "%s %s table, inact %u\n", __func__, name, inact); 1861138568Ssam 1862138568Ssam nt->nt_ic = ic; 1863138568Ssam /* XXX need unit */ 1864138568Ssam IEEE80211_NODE_LOCK_INIT(nt, ic->ic_ifp->if_xname); 1865138568Ssam IEEE80211_SCAN_LOCK_INIT(nt, ic->ic_ifp->if_xname); 1866138568Ssam TAILQ_INIT(&nt->nt_node); 1867138568Ssam nt->nt_name = name; 1868138568Ssam nt->nt_scangen = 1; 1869138568Ssam nt->nt_inact_init = inact; 1870138568Ssam nt->nt_timeout = timeout; 1871138568Ssam} 1872138568Ssam 1873138568Ssamvoid 1874138568Ssamieee80211_node_table_reset(struct ieee80211_node_table *nt) 1875138568Ssam{ 1876138568Ssam 1877138568Ssam IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE, 1878138568Ssam "%s %s table\n", __func__, nt->nt_name); 1879138568Ssam 1880138568Ssam IEEE80211_NODE_LOCK(nt); 1881138568Ssam nt->nt_inact_timer = 0; 1882138568Ssam ieee80211_free_allnodes_locked(nt); 1883138568Ssam IEEE80211_NODE_UNLOCK(nt); 1884138568Ssam} 1885138568Ssam 1886138568Ssamstatic void 1887138568Ssamieee80211_node_table_cleanup(struct ieee80211_node_table *nt) 1888138568Ssam{ 1889138568Ssam 1890138568Ssam IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE, 1891138568Ssam "%s %s table\n", __func__, nt->nt_name); 1892138568Ssam 1893138568Ssam ieee80211_free_allnodes_locked(nt); 1894138568Ssam IEEE80211_SCAN_LOCK_DESTROY(nt); 1895138568Ssam IEEE80211_NODE_LOCK_DESTROY(nt); 1896138568Ssam} 1897