ieee80211_node.c revision 148320
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 148320 2005-07-22 23:25:46Z 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 62138568Ssamstatic struct ieee80211_node *node_alloc(struct ieee80211_node_table *); 63138568Ssamstatic void node_cleanup(struct ieee80211_node *); 64138568Ssamstatic void node_free(struct ieee80211_node *); 65138568Ssamstatic u_int8_t node_getrssi(const struct ieee80211_node *); 66116742Ssam 67138568Ssamstatic void ieee80211_setup_node(struct ieee80211_node_table *, 68138568Ssam struct ieee80211_node *, const u_int8_t *); 69138568Ssamstatic void _ieee80211_free_node(struct ieee80211_node *); 70138568Ssamstatic void ieee80211_free_allnodes(struct ieee80211_node_table *); 71120104Ssam 72138568Ssamstatic void ieee80211_timeout_scan_candidates(struct ieee80211_node_table *); 73138568Ssamstatic void ieee80211_timeout_stations(struct ieee80211_node_table *); 74116742Ssam 75148304Ssamstatic void ieee80211_set_tim(struct ieee80211_node *, int set); 76138568Ssam 77138568Ssamstatic void ieee80211_node_table_init(struct ieee80211com *ic, 78138568Ssam struct ieee80211_node_table *nt, const char *name, int inact, 79138568Ssam void (*timeout)(struct ieee80211_node_table *)); 80138568Ssamstatic void ieee80211_node_table_cleanup(struct ieee80211_node_table *nt); 81138568Ssam 82127876SsamMALLOC_DEFINE(M_80211_NODE, "80211node", "802.11 node state"); 83120481Ssam 84116742Ssamvoid 85138568Ssamieee80211_node_attach(struct ieee80211com *ic) 86116742Ssam{ 87116742Ssam 88140753Ssam ieee80211_node_table_init(ic, &ic->ic_sta, "station", 89140753Ssam IEEE80211_INACT_INIT, ieee80211_timeout_stations); 90138568Ssam ieee80211_node_table_init(ic, &ic->ic_scan, "scan", 91138568Ssam IEEE80211_INACT_SCAN, ieee80211_timeout_scan_candidates); 92138568Ssam 93138568Ssam ic->ic_node_alloc = node_alloc; 94138568Ssam ic->ic_node_free = node_free; 95138568Ssam ic->ic_node_cleanup = node_cleanup; 96138568Ssam ic->ic_node_getrssi = node_getrssi; 97138568Ssam 98138568Ssam /* default station inactivity timer setings */ 99138568Ssam ic->ic_inact_init = IEEE80211_INACT_INIT; 100138568Ssam ic->ic_inact_auth = IEEE80211_INACT_AUTH; 101138568Ssam ic->ic_inact_run = IEEE80211_INACT_RUN; 102138568Ssam ic->ic_inact_probe = IEEE80211_INACT_PROBE; 103138568Ssam 104138568Ssam /* XXX defer */ 105138568Ssam if (ic->ic_max_aid == 0) 106138568Ssam ic->ic_max_aid = IEEE80211_AID_DEF; 107138568Ssam else if (ic->ic_max_aid > IEEE80211_AID_MAX) 108138568Ssam ic->ic_max_aid = IEEE80211_AID_MAX; 109138568Ssam MALLOC(ic->ic_aid_bitmap, u_int32_t *, 110138568Ssam howmany(ic->ic_max_aid, 32) * sizeof(u_int32_t), 111138568Ssam M_DEVBUF, M_NOWAIT | M_ZERO); 112138568Ssam if (ic->ic_aid_bitmap == NULL) { 113138568Ssam /* XXX no way to recover */ 114138568Ssam printf("%s: no memory for AID bitmap!\n", __func__); 115138568Ssam ic->ic_max_aid = 0; 116138568Ssam } 117138568Ssam 118138568Ssam /* XXX defer until using hostap/ibss mode */ 119138568Ssam ic->ic_tim_len = howmany(ic->ic_max_aid, 8) * sizeof(u_int8_t); 120138568Ssam MALLOC(ic->ic_tim_bitmap, u_int8_t *, ic->ic_tim_len, 121138568Ssam M_DEVBUF, M_NOWAIT | M_ZERO); 122138568Ssam if (ic->ic_tim_bitmap == NULL) { 123138568Ssam /* XXX no way to recover */ 124138568Ssam printf("%s: no memory for TIM bitmap!\n", __func__); 125138568Ssam } 126138568Ssam ic->ic_set_tim = ieee80211_set_tim; /* NB: driver should override */ 127118887Ssam} 128118887Ssam 129118887Ssamvoid 130138568Ssamieee80211_node_lateattach(struct ieee80211com *ic) 131118887Ssam{ 132127766Ssam struct ieee80211_node *ni; 133138568Ssam struct ieee80211_rsnparms *rsn; 134118887Ssam 135138568Ssam ni = ieee80211_alloc_node(&ic->ic_scan, ic->ic_myaddr); 136127766Ssam KASSERT(ni != NULL, ("unable to setup inital BSS node")); 137138568Ssam /* 138138568Ssam * Setup "global settings" in the bss node so that 139138568Ssam * each new station automatically inherits them. 140138568Ssam */ 141138568Ssam rsn = &ni->ni_rsn; 142138568Ssam /* WEP, TKIP, and AES-CCM are always supported */ 143138568Ssam rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_WEP; 144138568Ssam rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_TKIP; 145138568Ssam rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_AES_CCM; 146138568Ssam if (ic->ic_caps & IEEE80211_C_AES) 147138568Ssam rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_AES_OCB; 148138568Ssam if (ic->ic_caps & IEEE80211_C_CKIP) 149138568Ssam rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_CKIP; 150138568Ssam /* 151138568Ssam * Default unicast cipher to WEP for 802.1x use. If 152138568Ssam * WPA is enabled the management code will set these 153138568Ssam * values to reflect. 154138568Ssam */ 155138568Ssam rsn->rsn_ucastcipher = IEEE80211_CIPHER_WEP; 156138568Ssam rsn->rsn_ucastkeylen = 104 / NBBY; 157138568Ssam /* 158138568Ssam * WPA says the multicast cipher is the lowest unicast 159138568Ssam * cipher supported. But we skip WEP which would 160138568Ssam * otherwise be used based on this criteria. 161138568Ssam */ 162138568Ssam rsn->rsn_mcastcipher = IEEE80211_CIPHER_TKIP; 163138568Ssam rsn->rsn_mcastkeylen = 128 / NBBY; 164138568Ssam 165138568Ssam /* 166138568Ssam * We support both WPA-PSK and 802.1x; the one used 167138568Ssam * is determined by the authentication mode and the 168138568Ssam * setting of the PSK state. 169138568Ssam */ 170138568Ssam rsn->rsn_keymgmtset = WPA_ASE_8021X_UNSPEC | WPA_ASE_8021X_PSK; 171138568Ssam rsn->rsn_keymgmt = WPA_ASE_8021X_PSK; 172138568Ssam 173138568Ssam ic->ic_bss = ieee80211_ref_node(ni); /* hold reference */ 174138568Ssam ic->ic_auth = ieee80211_authenticator_get(ni->ni_authmode); 175116742Ssam} 176116742Ssam 177116742Ssamvoid 178138568Ssamieee80211_node_detach(struct ieee80211com *ic) 179116742Ssam{ 180116742Ssam 181138568Ssam if (ic->ic_bss != NULL) { 182138568Ssam ieee80211_free_node(ic->ic_bss); 183138568Ssam ic->ic_bss = NULL; 184138568Ssam } 185138568Ssam ieee80211_node_table_cleanup(&ic->ic_scan); 186140753Ssam ieee80211_node_table_cleanup(&ic->ic_sta); 187138568Ssam if (ic->ic_aid_bitmap != NULL) { 188138568Ssam FREE(ic->ic_aid_bitmap, M_DEVBUF); 189138568Ssam ic->ic_aid_bitmap = NULL; 190138568Ssam } 191138568Ssam if (ic->ic_tim_bitmap != NULL) { 192138568Ssam FREE(ic->ic_tim_bitmap, M_DEVBUF); 193138568Ssam ic->ic_tim_bitmap = NULL; 194138568Ssam } 195116742Ssam} 196116742Ssam 197138568Ssam/* 198138568Ssam * Port authorize/unauthorize interfaces for use by an authenticator. 199138568Ssam */ 200138568Ssam 201138568Ssamvoid 202148302Ssamieee80211_node_authorize(struct ieee80211_node *ni) 203138568Ssam{ 204148302Ssam struct ieee80211com *ic = ni->ni_ic; 205148302Ssam 206138568Ssam ni->ni_flags |= IEEE80211_NODE_AUTH; 207139528Ssam ni->ni_inact_reload = ic->ic_inact_run; 208138568Ssam} 209138568Ssam 210138568Ssamvoid 211148302Ssamieee80211_node_unauthorize(struct ieee80211_node *ni) 212138568Ssam{ 213138568Ssam ni->ni_flags &= ~IEEE80211_NODE_AUTH; 214138568Ssam} 215138568Ssam 216116742Ssam/* 217138568Ssam * Set/change the channel. The rate set is also updated as 218138568Ssam * to insure a consistent view by drivers. 219138568Ssam */ 220138568Ssamstatic __inline void 221138568Ssamieee80211_set_chan(struct ieee80211com *ic, 222138568Ssam struct ieee80211_node *ni, struct ieee80211_channel *chan) 223138568Ssam{ 224138568Ssam ni->ni_chan = chan; 225138568Ssam ni->ni_rates = ic->ic_sup_rates[ieee80211_chan2mode(ic, chan)]; 226138568Ssam} 227138568Ssam 228138568Ssam/* 229116742Ssam * AP scanning support. 230116742Ssam */ 231116742Ssam 232138568Ssam#ifdef IEEE80211_DEBUG 233138568Ssamstatic void 234138568Ssamdump_chanlist(const u_char chans[]) 235138568Ssam{ 236138568Ssam const char *sep; 237138568Ssam int i; 238138568Ssam 239138568Ssam sep = " "; 240138568Ssam for (i = 0; i < IEEE80211_CHAN_MAX; i++) 241138568Ssam if (isset(chans, i)) { 242138568Ssam printf("%s%u", sep, i); 243138568Ssam sep = ", "; 244138568Ssam } 245138568Ssam} 246138568Ssam#endif /* IEEE80211_DEBUG */ 247138568Ssam 248116742Ssam/* 249138568Ssam * Initialize the channel set to scan based on the 250116742Ssam * of available channels and the current PHY mode. 251116742Ssam */ 252117811Ssamstatic void 253138568Ssamieee80211_reset_scan(struct ieee80211com *ic) 254116742Ssam{ 255116742Ssam 256138568Ssam /* XXX ic_des_chan should be handled with ic_chan_active */ 257138568Ssam if (ic->ic_des_chan != IEEE80211_CHAN_ANYC) { 258138568Ssam memset(ic->ic_chan_scan, 0, sizeof(ic->ic_chan_scan)); 259138568Ssam setbit(ic->ic_chan_scan, 260138568Ssam ieee80211_chan2ieee(ic, ic->ic_des_chan)); 261138568Ssam } else 262138568Ssam memcpy(ic->ic_chan_scan, ic->ic_chan_active, 263138568Ssam sizeof(ic->ic_chan_active)); 264117811Ssam /* NB: hack, setup so next_scan starts with the first channel */ 265117811Ssam if (ic->ic_bss->ni_chan == IEEE80211_CHAN_ANYC) 266138568Ssam ieee80211_set_chan(ic, ic->ic_bss, 267138568Ssam &ic->ic_channels[IEEE80211_CHAN_MAX]); 268138568Ssam#ifdef IEEE80211_DEBUG 269138568Ssam if (ieee80211_msg_scan(ic)) { 270138568Ssam printf("%s: scan set:", __func__); 271138568Ssam dump_chanlist(ic->ic_chan_scan); 272138568Ssam printf(" start chan %u\n", 273138568Ssam ieee80211_chan2ieee(ic, ic->ic_bss->ni_chan)); 274138568Ssam } 275138568Ssam#endif /* IEEE80211_DEBUG */ 276116742Ssam} 277116742Ssam 278116742Ssam/* 279116742Ssam * Begin an active scan. 280116742Ssam */ 281116742Ssamvoid 282138568Ssamieee80211_begin_scan(struct ieee80211com *ic, int reset) 283116742Ssam{ 284116742Ssam 285138568Ssam ic->ic_scan.nt_scangen++; 286117811Ssam /* 287117811Ssam * In all but hostap mode scanning starts off in 288117811Ssam * an active mode before switching to passive. 289117811Ssam */ 290121180Ssam if (ic->ic_opmode != IEEE80211_M_HOSTAP) { 291117811Ssam ic->ic_flags |= IEEE80211_F_ASCAN; 292121180Ssam ic->ic_stats.is_scan_active++; 293121180Ssam } else 294121180Ssam ic->ic_stats.is_scan_passive++; 295139520Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, 296139520Ssam "begin %s scan in %s mode, scangen %u\n", 297138568Ssam (ic->ic_flags & IEEE80211_F_ASCAN) ? "active" : "passive", 298139520Ssam ieee80211_phymode_name[ic->ic_curmode], ic->ic_scan.nt_scangen); 299116742Ssam /* 300138568Ssam * Clear scan state and flush any previously seen AP's. 301116742Ssam */ 302138568Ssam ieee80211_reset_scan(ic); 303138568Ssam if (reset) 304138568Ssam ieee80211_free_allnodes(&ic->ic_scan); 305116742Ssam 306138568Ssam ic->ic_flags |= IEEE80211_F_SCAN; 307138568Ssam 308117811Ssam /* Scan the next channel. */ 309138568Ssam ieee80211_next_scan(ic); 310116742Ssam} 311116742Ssam 312116742Ssam/* 313116742Ssam * Switch to the next channel marked for scanning. 314116742Ssam */ 315138568Ssamint 316138568Ssamieee80211_next_scan(struct ieee80211com *ic) 317116742Ssam{ 318116742Ssam struct ieee80211_channel *chan; 319116742Ssam 320138568Ssam /* 321138568Ssam * Insure any previous mgt frame timeouts don't fire. 322138568Ssam * This assumes the driver does the right thing in 323138568Ssam * flushing anything queued in the driver and below. 324138568Ssam */ 325138568Ssam ic->ic_mgt_timer = 0; 326138568Ssam 327116742Ssam chan = ic->ic_bss->ni_chan; 328138568Ssam do { 329116742Ssam if (++chan > &ic->ic_channels[IEEE80211_CHAN_MAX]) 330116742Ssam chan = &ic->ic_channels[0]; 331116742Ssam if (isset(ic->ic_chan_scan, ieee80211_chan2ieee(ic, chan))) { 332138568Ssam clrbit(ic->ic_chan_scan, ieee80211_chan2ieee(ic, chan)); 333138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, 334138568Ssam "%s: chan %d->%d\n", __func__, 335138568Ssam ieee80211_chan2ieee(ic, ic->ic_bss->ni_chan), 336138568Ssam ieee80211_chan2ieee(ic, chan)); 337138568Ssam ieee80211_set_chan(ic, ic->ic_bss, chan); 338138568Ssam ieee80211_new_state(ic, IEEE80211_S_SCAN, -1); 339138568Ssam return 1; 340116742Ssam } 341138568Ssam } while (chan != ic->ic_bss->ni_chan); 342138568Ssam ieee80211_end_scan(ic); 343138568Ssam return 0; 344116742Ssam} 345116742Ssam 346141658Ssamstatic __inline void 347141658Ssamcopy_bss(struct ieee80211_node *nbss, const struct ieee80211_node *obss) 348141658Ssam{ 349141658Ssam /* propagate useful state */ 350141658Ssam nbss->ni_authmode = obss->ni_authmode; 351141658Ssam nbss->ni_txpower = obss->ni_txpower; 352141658Ssam nbss->ni_vlan = obss->ni_vlan; 353141658Ssam nbss->ni_rsn = obss->ni_rsn; 354141658Ssam /* XXX statistics? */ 355141658Ssam} 356141658Ssam 357116742Ssamvoid 358116742Ssamieee80211_create_ibss(struct ieee80211com* ic, struct ieee80211_channel *chan) 359116742Ssam{ 360140753Ssam struct ieee80211_node_table *nt; 361116742Ssam struct ieee80211_node *ni; 362116742Ssam 363138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, 364138568Ssam "%s: creating ibss\n", __func__); 365138568Ssam 366138568Ssam /* 367138568Ssam * Create the station/neighbor table. Note that for adhoc 368138568Ssam * mode we make the initial inactivity timer longer since 369138568Ssam * we create nodes only through discovery and they typically 370138568Ssam * are long-lived associations. 371138568Ssam */ 372140753Ssam nt = &ic->ic_sta; 373140753Ssam IEEE80211_NODE_LOCK(nt); 374140753Ssam if (ic->ic_opmode == IEEE80211_M_HOSTAP) { 375140753Ssam nt->nt_name = "station"; 376140753Ssam nt->nt_inact_init = ic->ic_inact_init; 377140753Ssam } else { 378140753Ssam nt->nt_name = "neighbor"; 379140753Ssam nt->nt_inact_init = ic->ic_inact_run; 380140753Ssam } 381140753Ssam IEEE80211_NODE_UNLOCK(nt); 382140753Ssam 383140753Ssam ni = ieee80211_alloc_node(nt, ic->ic_myaddr); 384140753Ssam if (ni == NULL) { 385140753Ssam /* XXX recovery? */ 386138568Ssam return; 387138568Ssam } 388116742Ssam IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_myaddr); 389116742Ssam ni->ni_esslen = ic->ic_des_esslen; 390116742Ssam memcpy(ni->ni_essid, ic->ic_des_essid, ni->ni_esslen); 391141658Ssam copy_bss(ni, ic->ic_bss); 392116742Ssam ni->ni_intval = ic->ic_lintval; 393138568Ssam if (ic->ic_flags & IEEE80211_F_PRIVACY) 394116742Ssam ni->ni_capinfo |= IEEE80211_CAPINFO_PRIVACY; 395116742Ssam if (ic->ic_phytype == IEEE80211_T_FH) { 396116742Ssam ni->ni_fhdwell = 200; /* XXX */ 397116742Ssam ni->ni_fhindex = 1; 398116742Ssam } 399138568Ssam if (ic->ic_opmode == IEEE80211_M_IBSS) { 400138568Ssam ic->ic_flags |= IEEE80211_F_SIBSS; 401138568Ssam ni->ni_capinfo |= IEEE80211_CAPINFO_IBSS; /* XXX */ 402143300Ssam if (ic->ic_flags & IEEE80211_F_DESBSSID) 403143300Ssam IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_des_bssid); 404143300Ssam else 405143300Ssam ni->ni_bssid[0] |= 0x02; /* local bit for IBSS */ 406138568Ssam } 407138568Ssam /* 408138568Ssam * Fix the channel and related attributes. 409138568Ssam */ 410138568Ssam ieee80211_set_chan(ic, ni, chan); 411138568Ssam ic->ic_curmode = ieee80211_chan2mode(ic, chan); 412138568Ssam /* 413138568Ssam * Do mode-specific rate setup. 414138568Ssam */ 415138568Ssam if (ic->ic_curmode == IEEE80211_MODE_11G) { 416138568Ssam /* 417138568Ssam * Use a mixed 11b/11g rate set. 418138568Ssam */ 419138568Ssam ieee80211_set11gbasicrates(&ni->ni_rates, IEEE80211_MODE_11G); 420138568Ssam } else if (ic->ic_curmode == IEEE80211_MODE_11B) { 421138568Ssam /* 422138568Ssam * Force pure 11b rate set. 423138568Ssam */ 424138568Ssam ieee80211_set11gbasicrates(&ni->ni_rates, IEEE80211_MODE_11B); 425138568Ssam } 426138568Ssam 427140753Ssam (void) ieee80211_sta_join(ic, ieee80211_ref_node(ni)); 428116742Ssam} 429116742Ssam 430138568Ssamvoid 431138568Ssamieee80211_reset_bss(struct ieee80211com *ic) 432138568Ssam{ 433138568Ssam struct ieee80211_node *ni, *obss; 434138568Ssam 435138568Ssam ieee80211_node_table_reset(&ic->ic_scan); 436140753Ssam ieee80211_node_table_reset(&ic->ic_sta); 437140753Ssam 438138568Ssam ni = ieee80211_alloc_node(&ic->ic_scan, ic->ic_myaddr); 439138568Ssam KASSERT(ni != NULL, ("unable to setup inital BSS node")); 440138568Ssam obss = ic->ic_bss; 441138568Ssam ic->ic_bss = ieee80211_ref_node(ni); 442141658Ssam if (obss != NULL) { 443141658Ssam copy_bss(ni, obss); 444141658Ssam ni->ni_intval = ic->ic_lintval; 445138568Ssam ieee80211_free_node(obss); 446141658Ssam } 447138568Ssam} 448138568Ssam 449127767Ssamstatic int 450138568Ssamieee80211_match_bss(struct ieee80211com *ic, struct ieee80211_node *ni) 451127767Ssam{ 452127767Ssam u_int8_t rate; 453127767Ssam int fail; 454127767Ssam 455127767Ssam fail = 0; 456127767Ssam if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 457127767Ssam fail |= 0x01; 458127767Ssam if (ic->ic_des_chan != IEEE80211_CHAN_ANYC && 459127767Ssam ni->ni_chan != ic->ic_des_chan) 460127767Ssam fail |= 0x01; 461127767Ssam if (ic->ic_opmode == IEEE80211_M_IBSS) { 462127767Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 463127767Ssam fail |= 0x02; 464127767Ssam } else { 465127767Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 466127767Ssam fail |= 0x02; 467127767Ssam } 468138568Ssam if (ic->ic_flags & IEEE80211_F_PRIVACY) { 469127767Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 470127767Ssam fail |= 0x04; 471127767Ssam } else { 472127767Ssam /* XXX does this mean privacy is supported or required? */ 473127767Ssam if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 474127767Ssam fail |= 0x04; 475127767Ssam } 476148299Ssam rate = ieee80211_fix_rate(ni, IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 477127767Ssam if (rate & IEEE80211_RATE_BASIC) 478127767Ssam fail |= 0x08; 479127767Ssam if (ic->ic_des_esslen != 0 && 480127767Ssam (ni->ni_esslen != ic->ic_des_esslen || 481127767Ssam memcmp(ni->ni_essid, ic->ic_des_essid, ic->ic_des_esslen) != 0)) 482127767Ssam fail |= 0x10; 483127767Ssam if ((ic->ic_flags & IEEE80211_F_DESBSSID) && 484127767Ssam !IEEE80211_ADDR_EQ(ic->ic_des_bssid, ni->ni_bssid)) 485127767Ssam fail |= 0x20; 486127767Ssam#ifdef IEEE80211_DEBUG 487138568Ssam if (ieee80211_msg_scan(ic)) { 488127767Ssam printf(" %c %s", fail ? '-' : '+', 489127767Ssam ether_sprintf(ni->ni_macaddr)); 490127767Ssam printf(" %s%c", ether_sprintf(ni->ni_bssid), 491127767Ssam fail & 0x20 ? '!' : ' '); 492127767Ssam printf(" %3d%c", ieee80211_chan2ieee(ic, ni->ni_chan), 493127767Ssam fail & 0x01 ? '!' : ' '); 494127767Ssam printf(" %+4d", ni->ni_rssi); 495127767Ssam printf(" %2dM%c", (rate & IEEE80211_RATE_VAL) / 2, 496127767Ssam fail & 0x08 ? '!' : ' '); 497127767Ssam printf(" %4s%c", 498127767Ssam (ni->ni_capinfo & IEEE80211_CAPINFO_ESS) ? "ess" : 499127767Ssam (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) ? "ibss" : 500127767Ssam "????", 501127767Ssam fail & 0x02 ? '!' : ' '); 502127767Ssam printf(" %3s%c ", 503127767Ssam (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) ? 504127767Ssam "wep" : "no", 505127767Ssam fail & 0x04 ? '!' : ' '); 506127767Ssam ieee80211_print_essid(ni->ni_essid, ni->ni_esslen); 507127767Ssam printf("%s\n", fail & 0x10 ? "!" : ""); 508127767Ssam } 509127767Ssam#endif 510127767Ssam return fail; 511127767Ssam} 512127767Ssam 513138568Ssamstatic __inline u_int8_t 514138568Ssammaxrate(const struct ieee80211_node *ni) 515138568Ssam{ 516138568Ssam const struct ieee80211_rateset *rs = &ni->ni_rates; 517138568Ssam /* NB: assumes rate set is sorted (happens on frame receive) */ 518138568Ssam return rs->rs_rates[rs->rs_nrates-1] & IEEE80211_RATE_VAL; 519138568Ssam} 520138568Ssam 521116742Ssam/* 522138568Ssam * Compare the capabilities of two nodes and decide which is 523138568Ssam * more desirable (return >0 if a is considered better). Note 524138568Ssam * that we assume compatibility/usability has already been checked 525138568Ssam * so we don't need to (e.g. validate whether privacy is supported). 526138568Ssam * Used to select the best scan candidate for association in a BSS. 527138568Ssam */ 528138568Ssamstatic int 529138568Ssamieee80211_node_compare(struct ieee80211com *ic, 530138568Ssam const struct ieee80211_node *a, 531138568Ssam const struct ieee80211_node *b) 532138568Ssam{ 533138568Ssam u_int8_t maxa, maxb; 534138568Ssam u_int8_t rssia, rssib; 535138568Ssam 536138568Ssam /* privacy support preferred */ 537138568Ssam if ((a->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) && 538138568Ssam (b->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 539138568Ssam return 1; 540138568Ssam if ((a->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0 && 541138568Ssam (b->ni_capinfo & IEEE80211_CAPINFO_PRIVACY)) 542138568Ssam return -1; 543138568Ssam 544138568Ssam rssia = ic->ic_node_getrssi(a); 545138568Ssam rssib = ic->ic_node_getrssi(b); 546139543Ssam if (abs(rssib - rssia) < 5) { 547139543Ssam /* best/max rate preferred if signal level close enough XXX */ 548139543Ssam maxa = maxrate(a); 549139543Ssam maxb = maxrate(b); 550139543Ssam if (maxa != maxb) 551139543Ssam return maxa - maxb; 552139543Ssam /* XXX use freq for channel preference */ 553139543Ssam /* for now just prefer 5Ghz band to all other bands */ 554139543Ssam if (IEEE80211_IS_CHAN_5GHZ(a->ni_chan) && 555139543Ssam !IEEE80211_IS_CHAN_5GHZ(b->ni_chan)) 556139543Ssam return 1; 557139543Ssam if (!IEEE80211_IS_CHAN_5GHZ(a->ni_chan) && 558139543Ssam IEEE80211_IS_CHAN_5GHZ(b->ni_chan)) 559139543Ssam return -1; 560139543Ssam } 561138568Ssam /* all things being equal, use signal level */ 562138568Ssam return rssia - rssib; 563138568Ssam} 564138568Ssam 565138568Ssam/* 566140441Ssam * Mark an ongoing scan stopped. 567140441Ssam */ 568140441Ssamvoid 569140441Ssamieee80211_cancel_scan(struct ieee80211com *ic) 570140441Ssam{ 571140441Ssam 572140441Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, "%s: end %s scan\n", 573140441Ssam __func__, 574140441Ssam (ic->ic_flags & IEEE80211_F_ASCAN) ? "active" : "passive"); 575140441Ssam 576140441Ssam ic->ic_flags &= ~(IEEE80211_F_SCAN | IEEE80211_F_ASCAN); 577140441Ssam} 578140441Ssam 579140441Ssam/* 580116742Ssam * Complete a scan of potential channels. 581116742Ssam */ 582116742Ssamvoid 583138568Ssamieee80211_end_scan(struct ieee80211com *ic) 584116742Ssam{ 585140448Ssam struct ieee80211_node_table *nt = &ic->ic_scan; 586140448Ssam struct ieee80211_node *ni, *selbs; 587116742Ssam 588140441Ssam ieee80211_cancel_scan(ic); 589140441Ssam ieee80211_notify_scan_done(ic); 590116742Ssam 591116742Ssam if (ic->ic_opmode == IEEE80211_M_HOSTAP) { 592138568Ssam u_int8_t maxrssi[IEEE80211_CHAN_MAX]; /* XXX off stack? */ 593138568Ssam int i, bestchan; 594138568Ssam u_int8_t rssi; 595138568Ssam 596116742Ssam /* 597116742Ssam * The passive scan to look for existing AP's completed, 598116742Ssam * select a channel to camp on. Identify the channels 599116742Ssam * that already have one or more AP's and try to locate 600140753Ssam * an unoccupied one. If that fails, pick a channel that 601138568Ssam * looks to be quietest. 602116742Ssam */ 603138568Ssam memset(maxrssi, 0, sizeof(maxrssi)); 604140448Ssam IEEE80211_NODE_LOCK(nt); 605140448Ssam TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 606138568Ssam rssi = ic->ic_node_getrssi(ni); 607138568Ssam i = ieee80211_chan2ieee(ic, ni->ni_chan); 608138568Ssam if (rssi > maxrssi[i]) 609138568Ssam maxrssi[i] = rssi; 610116742Ssam } 611140448Ssam IEEE80211_NODE_UNLOCK(nt); 612138568Ssam /* XXX select channel more intelligently */ 613138568Ssam bestchan = -1; 614116742Ssam for (i = 0; i < IEEE80211_CHAN_MAX; i++) 615138568Ssam if (isset(ic->ic_chan_active, i)) { 616138568Ssam /* 617138568Ssam * If the channel is unoccupied the max rssi 618138568Ssam * should be zero; just take it. Otherwise 619138568Ssam * track the channel with the lowest rssi and 620138568Ssam * use that when all channels appear occupied. 621138568Ssam */ 622138568Ssam if (maxrssi[i] == 0) { 623138568Ssam bestchan = i; 624116742Ssam break; 625138568Ssam } 626143715Ssam if (bestchan == -1 || 627143715Ssam maxrssi[i] < maxrssi[bestchan]) 628138568Ssam bestchan = i; 629138568Ssam } 630138568Ssam if (bestchan != -1) { 631138568Ssam ieee80211_create_ibss(ic, &ic->ic_channels[bestchan]); 632138568Ssam return; 633116742Ssam } 634138568Ssam /* no suitable channel, should not happen */ 635138568Ssam } 636138568Ssam 637138568Ssam /* 638138568Ssam * When manually sequencing the state machine; scan just once 639138568Ssam * regardless of whether we have a candidate or not. The 640138568Ssam * controlling application is expected to setup state and 641138568Ssam * initiate an association. 642138568Ssam */ 643138568Ssam if (ic->ic_roaming == IEEE80211_ROAMING_MANUAL) 644116742Ssam return; 645138568Ssam /* 646138568Ssam * Automatic sequencing; look for a candidate and 647138568Ssam * if found join the network. 648138568Ssam */ 649140448Ssam /* NB: unlocked read should be ok */ 650140448Ssam if (TAILQ_FIRST(&nt->nt_node) == NULL) { 651138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, 652138568Ssam "%s: no scan candidate\n", __func__); 653116742Ssam notfound: 654116742Ssam if (ic->ic_opmode == IEEE80211_M_IBSS && 655116742Ssam (ic->ic_flags & IEEE80211_F_IBSSON) && 656116742Ssam ic->ic_des_esslen != 0) { 657116742Ssam ieee80211_create_ibss(ic, ic->ic_ibss_chan); 658116742Ssam return; 659116742Ssam } 660116742Ssam /* 661116742Ssam * Reset the list of channels to scan and start again. 662116742Ssam */ 663138568Ssam ieee80211_reset_scan(ic); 664138568Ssam ic->ic_flags |= IEEE80211_F_SCAN; 665138568Ssam ieee80211_next_scan(ic); 666116742Ssam return; 667116742Ssam } 668116742Ssam selbs = NULL; 669138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, "\t%s\n", 670138568Ssam "macaddr bssid chan rssi rate flag wep essid"); 671140448Ssam IEEE80211_NODE_LOCK(nt); 672140448Ssam TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 673116742Ssam if (ni->ni_fails) { 674116742Ssam /* 675116742Ssam * The configuration of the access points may change 676116742Ssam * during my scan. So delete the entry for the AP 677116742Ssam * and retry to associate if there is another beacon. 678116742Ssam */ 679138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, 680138568Ssam "%s: skip scan candidate %s, fails %u\n", 681138568Ssam __func__, ether_sprintf(ni->ni_macaddr), 682138568Ssam ni->ni_fails); 683140448Ssam ni->ni_fails++; 684140448Ssam#if 0 685116742Ssam if (ni->ni_fails++ > 2) 686138568Ssam ieee80211_free_node(ni); 687140448Ssam#endif 688116742Ssam continue; 689116742Ssam } 690138568Ssam if (ieee80211_match_bss(ic, ni) == 0) { 691116742Ssam if (selbs == NULL) 692116742Ssam selbs = ni; 693140448Ssam else if (ieee80211_node_compare(ic, ni, selbs) > 0) 694116742Ssam selbs = ni; 695116742Ssam } 696116742Ssam } 697140448Ssam if (selbs != NULL) /* NB: grab ref while dropping lock */ 698140448Ssam (void) ieee80211_ref_node(selbs); 699140448Ssam IEEE80211_NODE_UNLOCK(nt); 700116742Ssam if (selbs == NULL) 701116742Ssam goto notfound; 702138568Ssam if (!ieee80211_sta_join(ic, selbs)) { 703140448Ssam ieee80211_free_node(selbs); 704138568Ssam goto notfound; 705138568Ssam } 706138568Ssam} 707138568Ssam 708138568Ssam/* 709138568Ssam * Handle 802.11 ad hoc network merge. The 710138568Ssam * convention, set by the Wireless Ethernet Compatibility Alliance 711138568Ssam * (WECA), is that an 802.11 station will change its BSSID to match 712138568Ssam * the "oldest" 802.11 ad hoc network, on the same channel, that 713138568Ssam * has the station's desired SSID. The "oldest" 802.11 network 714138568Ssam * sends beacons with the greatest TSF timestamp. 715138568Ssam * 716138568Ssam * The caller is assumed to validate TSF's before attempting a merge. 717138568Ssam * 718138568Ssam * Return !0 if the BSSID changed, 0 otherwise. 719138568Ssam */ 720138568Ssamint 721148306Ssamieee80211_ibss_merge(struct ieee80211_node *ni) 722138568Ssam{ 723148306Ssam struct ieee80211com *ic = ni->ni_ic; 724138568Ssam 725140453Ssam if (ni == ic->ic_bss || 726140453Ssam IEEE80211_ADDR_EQ(ni->ni_bssid, ic->ic_bss->ni_bssid)) { 727138568Ssam /* unchanged, nothing to do */ 728138568Ssam return 0; 729138568Ssam } 730138568Ssam if (ieee80211_match_bss(ic, ni) != 0) { /* capabilities mismatch */ 731138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 732138568Ssam "%s: merge failed, capabilities mismatch\n", __func__); 733138568Ssam ic->ic_stats.is_ibss_capmismatch++; 734138568Ssam return 0; 735138568Ssam } 736138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 737138568Ssam "%s: new bssid %s: %s preamble, %s slot time%s\n", __func__, 738138568Ssam ether_sprintf(ni->ni_bssid), 739138568Ssam ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long", 740138568Ssam ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long", 741138568Ssam ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : "" 742138568Ssam ); 743140753Ssam return ieee80211_sta_join(ic, ieee80211_ref_node(ni)); 744138568Ssam} 745138568Ssam 746138568Ssam/* 747138568Ssam * Join the specified IBSS/BSS network. The node is assumed to 748138568Ssam * be passed in with a held reference. 749138568Ssam */ 750138568Ssamint 751138568Ssamieee80211_sta_join(struct ieee80211com *ic, struct ieee80211_node *selbs) 752138568Ssam{ 753138568Ssam struct ieee80211_node *obss; 754138568Ssam 755116742Ssam if (ic->ic_opmode == IEEE80211_M_IBSS) { 756140753Ssam struct ieee80211_node_table *nt; 757138568Ssam /* 758140440Ssam * Delete unusable rates; we've already checked 759140440Ssam * that the negotiated rate set is acceptable. 760138568Ssam */ 761148299Ssam ieee80211_fix_rate(selbs, IEEE80211_F_DODEL); 762127772Ssam /* 763140753Ssam * Fillin the neighbor table; it will already 764139521Ssam * exist if we are simply switching mastership. 765140753Ssam * XXX ic_sta always setup so this is unnecessary? 766127772Ssam */ 767140753Ssam nt = &ic->ic_sta; 768140753Ssam IEEE80211_NODE_LOCK(nt); 769140753Ssam nt->nt_name = "neighbor"; 770140753Ssam nt->nt_inact_init = ic->ic_inact_run; 771140753Ssam IEEE80211_NODE_UNLOCK(nt); 772138568Ssam } 773138568Ssam 774138568Ssam /* 775138568Ssam * Committed to selbs, setup state. 776138568Ssam */ 777138568Ssam obss = ic->ic_bss; 778140753Ssam ic->ic_bss = selbs; /* NB: caller assumed to bump refcnt */ 779138568Ssam if (obss != NULL) 780138568Ssam ieee80211_free_node(obss); 781138568Ssam /* 782138568Ssam * Set the erp state (mostly the slot time) to deal with 783138568Ssam * the auto-select case; this should be redundant if the 784138568Ssam * mode is locked. 785138568Ssam */ 786138568Ssam ic->ic_curmode = ieee80211_chan2mode(ic, selbs->ni_chan); 787138568Ssam ieee80211_reset_erp(ic); 788138568Ssam ieee80211_wme_initparams(ic); 789140753Ssam 790140753Ssam if (ic->ic_opmode == IEEE80211_M_STA) 791140753Ssam ieee80211_new_state(ic, IEEE80211_S_AUTH, -1); 792140753Ssam else 793117811Ssam ieee80211_new_state(ic, IEEE80211_S_RUN, -1); 794138568Ssam return 1; 795116742Ssam} 796116742Ssam 797138568Ssam/* 798138568Ssam * Leave the specified IBSS/BSS network. The node is assumed to 799138568Ssam * be passed in with a held reference. 800138568Ssam */ 801138568Ssamvoid 802138568Ssamieee80211_sta_leave(struct ieee80211com *ic, struct ieee80211_node *ni) 803138568Ssam{ 804138568Ssam ic->ic_node_cleanup(ni); 805138568Ssam ieee80211_notify_node_leave(ic, ni); 806138568Ssam} 807138568Ssam 808116742Ssamstatic struct ieee80211_node * 809138568Ssamnode_alloc(struct ieee80211_node_table *nt) 810116742Ssam{ 811127768Ssam struct ieee80211_node *ni; 812138568Ssam 813127768Ssam MALLOC(ni, struct ieee80211_node *, sizeof(struct ieee80211_node), 814127768Ssam M_80211_NODE, M_NOWAIT | M_ZERO); 815127768Ssam return ni; 816116742Ssam} 817116742Ssam 818138568Ssam/* 819138568Ssam * Reclaim any resources in a node and reset any critical 820138568Ssam * state. Typically nodes are free'd immediately after, 821138568Ssam * but in some cases the storage may be reused so we need 822138568Ssam * to insure consistent state (should probably fix that). 823138568Ssam */ 824116742Ssamstatic void 825138568Ssamnode_cleanup(struct ieee80211_node *ni) 826116742Ssam{ 827138568Ssam#define N(a) (sizeof(a)/sizeof(a[0])) 828138568Ssam struct ieee80211com *ic = ni->ni_ic; 829138568Ssam int i, qlen; 830138568Ssam 831138568Ssam /* NB: preserve ni_table */ 832138568Ssam if (ni->ni_flags & IEEE80211_NODE_PWR_MGT) { 833138568Ssam ic->ic_ps_sta--; 834138568Ssam ni->ni_flags &= ~IEEE80211_NODE_PWR_MGT; 835138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_POWER, 836138568Ssam "[%s] power save mode off, %u sta's in ps mode\n", 837138568Ssam ether_sprintf(ni->ni_macaddr), ic->ic_ps_sta); 838138568Ssam } 839147788Ssam /* 840147788Ssam * Clear AREF flag that marks the authorization refcnt bump 841147788Ssam * has happened. This is probably not needed as the node 842147788Ssam * should always be removed from the table so not found but 843147788Ssam * do it just in case. 844147788Ssam */ 845147788Ssam ni->ni_flags &= ~IEEE80211_NODE_AREF; 846138568Ssam 847138568Ssam /* 848138568Ssam * Drain power save queue and, if needed, clear TIM. 849138568Ssam */ 850138568Ssam IEEE80211_NODE_SAVEQ_DRAIN(ni, qlen); 851138568Ssam if (qlen != 0 && ic->ic_set_tim != NULL) 852148304Ssam ic->ic_set_tim(ni, 0); 853138568Ssam 854138568Ssam ni->ni_associd = 0; 855138568Ssam if (ni->ni_challenge != NULL) { 856138568Ssam FREE(ni->ni_challenge, M_DEVBUF); 857138568Ssam ni->ni_challenge = NULL; 858138568Ssam } 859138568Ssam /* 860138568Ssam * Preserve SSID, WPA, and WME ie's so the bss node is 861138568Ssam * reusable during a re-auth/re-assoc state transition. 862138568Ssam * If we remove these data they will not be recreated 863138568Ssam * because they come from a probe-response or beacon frame 864138568Ssam * which cannot be expected prior to the association-response. 865138568Ssam * This should not be an issue when operating in other modes 866138568Ssam * as stations leaving always go through a full state transition 867138568Ssam * which will rebuild this state. 868138568Ssam * 869138568Ssam * XXX does this leave us open to inheriting old state? 870138568Ssam */ 871138568Ssam for (i = 0; i < N(ni->ni_rxfrag); i++) 872138568Ssam if (ni->ni_rxfrag[i] != NULL) { 873138568Ssam m_freem(ni->ni_rxfrag[i]); 874138568Ssam ni->ni_rxfrag[i] = NULL; 875138568Ssam } 876138568Ssam ieee80211_crypto_delkey(ic, &ni->ni_ucastkey); 877138568Ssam#undef N 878116742Ssam} 879116742Ssam 880116742Ssamstatic void 881138568Ssamnode_free(struct ieee80211_node *ni) 882116742Ssam{ 883138568Ssam struct ieee80211com *ic = ni->ni_ic; 884138568Ssam 885138568Ssam ic->ic_node_cleanup(ni); 886138568Ssam if (ni->ni_wpa_ie != NULL) 887138568Ssam FREE(ni->ni_wpa_ie, M_DEVBUF); 888138568Ssam if (ni->ni_wme_ie != NULL) 889138568Ssam FREE(ni->ni_wme_ie, M_DEVBUF); 890138568Ssam IEEE80211_NODE_SAVEQ_DESTROY(ni); 891138568Ssam FREE(ni, M_80211_NODE); 892116742Ssam} 893116742Ssam 894120104Ssamstatic u_int8_t 895138568Ssamnode_getrssi(const struct ieee80211_node *ni) 896120104Ssam{ 897120104Ssam return ni->ni_rssi; 898120104Ssam} 899120104Ssam 900116742Ssamstatic void 901138568Ssamieee80211_setup_node(struct ieee80211_node_table *nt, 902138568Ssam struct ieee80211_node *ni, const u_int8_t *macaddr) 903116742Ssam{ 904138568Ssam struct ieee80211com *ic = nt->nt_ic; 905116742Ssam int hash; 906116742Ssam 907138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 908140766Ssam "%s %p<%s> in %s table\n", __func__, ni, 909138568Ssam ether_sprintf(macaddr), nt->nt_name); 910138568Ssam 911116742Ssam IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 912116742Ssam hash = IEEE80211_NODE_HASH(macaddr); 913138568Ssam ieee80211_node_initref(ni); /* mark referenced */ 914138568Ssam ni->ni_chan = IEEE80211_CHAN_ANYC; 915138568Ssam ni->ni_authmode = IEEE80211_AUTH_OPEN; 916138568Ssam ni->ni_txpower = ic->ic_txpowlimit; /* max power */ 917138568Ssam ieee80211_crypto_resetkey(ic, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE); 918139528Ssam ni->ni_inact_reload = nt->nt_inact_init; 919139528Ssam ni->ni_inact = ni->ni_inact_reload; 920138568Ssam IEEE80211_NODE_SAVEQ_INIT(ni, "unknown"); 921138568Ssam 922138568Ssam IEEE80211_NODE_LOCK(nt); 923138568Ssam TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list); 924138568Ssam LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash); 925138568Ssam ni->ni_table = nt; 926138568Ssam ni->ni_ic = ic; 927138568Ssam IEEE80211_NODE_UNLOCK(nt); 928116742Ssam} 929116742Ssam 930116742Ssamstruct ieee80211_node * 931138568Ssamieee80211_alloc_node(struct ieee80211_node_table *nt, const u_int8_t *macaddr) 932116742Ssam{ 933138568Ssam struct ieee80211com *ic = nt->nt_ic; 934138568Ssam struct ieee80211_node *ni; 935138568Ssam 936138568Ssam ni = ic->ic_node_alloc(nt); 937116742Ssam if (ni != NULL) 938138568Ssam ieee80211_setup_node(nt, ni, macaddr); 939127769Ssam else 940127769Ssam ic->ic_stats.is_rx_nodealloc++; 941116742Ssam return ni; 942116742Ssam} 943116742Ssam 944116742Ssamstruct ieee80211_node * 945138568Ssamieee80211_dup_bss(struct ieee80211_node_table *nt, const u_int8_t *macaddr) 946116742Ssam{ 947138568Ssam struct ieee80211com *ic = nt->nt_ic; 948138568Ssam struct ieee80211_node *ni; 949138568Ssam 950138568Ssam ni = ic->ic_node_alloc(nt); 951116742Ssam if (ni != NULL) { 952138568Ssam ieee80211_setup_node(nt, ni, macaddr); 953127770Ssam /* 954127770Ssam * Inherit from ic_bss. 955127770Ssam */ 956138568Ssam ni->ni_authmode = ic->ic_bss->ni_authmode; 957138568Ssam ni->ni_txpower = ic->ic_bss->ni_txpower; 958138568Ssam ni->ni_vlan = ic->ic_bss->ni_vlan; /* XXX?? */ 959127770Ssam IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_bss->ni_bssid); 960138568Ssam ieee80211_set_chan(ic, ni, ic->ic_bss->ni_chan); 961138568Ssam ni->ni_rsn = ic->ic_bss->ni_rsn; 962127770Ssam } else 963127770Ssam ic->ic_stats.is_rx_nodealloc++; 964116742Ssam return ni; 965116742Ssam} 966116742Ssam 967127772Ssamstatic struct ieee80211_node * 968138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 969138568Ssam_ieee80211_find_node_debug(struct ieee80211_node_table *nt, 970138568Ssam const u_int8_t *macaddr, const char *func, int line) 971138568Ssam#else 972138568Ssam_ieee80211_find_node(struct ieee80211_node_table *nt, 973138568Ssam const u_int8_t *macaddr) 974138568Ssam#endif 975116742Ssam{ 976116742Ssam struct ieee80211_node *ni; 977116742Ssam int hash; 978116742Ssam 979138568Ssam IEEE80211_NODE_LOCK_ASSERT(nt); 980127772Ssam 981116742Ssam hash = IEEE80211_NODE_HASH(macaddr); 982138568Ssam LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 983116742Ssam if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 984138568Ssam ieee80211_ref_node(ni); /* mark referenced */ 985138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 986138568Ssam IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE, 987140766Ssam "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 988140766Ssam func, line, 989140766Ssam ni, ether_sprintf(ni->ni_macaddr), 990140766Ssam ieee80211_node_refcnt(ni)); 991138568Ssam#endif 992127772Ssam return ni; 993116742Ssam } 994116742Ssam } 995127772Ssam return NULL; 996127772Ssam} 997138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 998138568Ssam#define _ieee80211_find_node(nt, mac) \ 999138568Ssam _ieee80211_find_node_debug(nt, mac, func, line) 1000138568Ssam#endif 1001127772Ssam 1002127772Ssamstruct ieee80211_node * 1003138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1004138568Ssamieee80211_find_node_debug(struct ieee80211_node_table *nt, 1005138568Ssam const u_int8_t *macaddr, const char *func, int line) 1006138568Ssam#else 1007138568Ssamieee80211_find_node(struct ieee80211_node_table *nt, const u_int8_t *macaddr) 1008138568Ssam#endif 1009127772Ssam{ 1010127772Ssam struct ieee80211_node *ni; 1011127772Ssam 1012138568Ssam IEEE80211_NODE_LOCK(nt); 1013138568Ssam ni = _ieee80211_find_node(nt, macaddr); 1014138568Ssam IEEE80211_NODE_UNLOCK(nt); 1015116742Ssam return ni; 1016116742Ssam} 1017116742Ssam 1018116742Ssam/* 1019138568Ssam * Fake up a node; this handles node discovery in adhoc mode. 1020138568Ssam * Note that for the driver's benefit we we treat this like 1021138568Ssam * an association so the driver has an opportunity to setup 1022138568Ssam * it's private state. 1023138568Ssam */ 1024138568Ssamstruct ieee80211_node * 1025138568Ssamieee80211_fakeup_adhoc_node(struct ieee80211_node_table *nt, 1026138568Ssam const u_int8_t macaddr[IEEE80211_ADDR_LEN]) 1027138568Ssam{ 1028138568Ssam struct ieee80211com *ic = nt->nt_ic; 1029138568Ssam struct ieee80211_node *ni; 1030138568Ssam 1031138568Ssam ni = ieee80211_dup_bss(nt, macaddr); 1032138568Ssam if (ni != NULL) { 1033138568Ssam /* XXX no rate negotiation; just dup */ 1034138568Ssam ni->ni_rates = ic->ic_bss->ni_rates; 1035139524Ssam if (ic->ic_newassoc != NULL) 1036148307Ssam ic->ic_newassoc(ni, 1); 1037138568Ssam /* XXX not right for 802.1x/WPA */ 1038148302Ssam ieee80211_node_authorize(ni); 1039138568Ssam } 1040138568Ssam return ni; 1041138568Ssam} 1042138568Ssam 1043138568Ssam/* 1044138568Ssam * Locate the node for sender, track state, and then pass the 1045138568Ssam * (referenced) node up to the 802.11 layer for its use. We 1046138568Ssam * are required to pass some node so we fall back to ic_bss 1047138568Ssam * when this frame is from an unknown sender. The 802.11 layer 1048138568Ssam * knows this means the sender wasn't in the node table and 1049138568Ssam * acts accordingly. 1050138568Ssam */ 1051138568Ssamstruct ieee80211_node * 1052138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1053138568Ssamieee80211_find_rxnode_debug(struct ieee80211com *ic, 1054138568Ssam const struct ieee80211_frame_min *wh, const char *func, int line) 1055138568Ssam#else 1056138568Ssamieee80211_find_rxnode(struct ieee80211com *ic, 1057138568Ssam const struct ieee80211_frame_min *wh) 1058138568Ssam#endif 1059138568Ssam{ 1060138568Ssam#define IS_CTL(wh) \ 1061138568Ssam ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) == IEEE80211_FC0_TYPE_CTL) 1062138568Ssam#define IS_PSPOLL(wh) \ 1063138568Ssam ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == IEEE80211_FC0_SUBTYPE_PS_POLL) 1064138568Ssam struct ieee80211_node_table *nt; 1065138568Ssam struct ieee80211_node *ni; 1066138568Ssam 1067138568Ssam /* XXX may want scanned nodes in the neighbor table for adhoc */ 1068138568Ssam if (ic->ic_opmode == IEEE80211_M_STA || 1069138568Ssam ic->ic_opmode == IEEE80211_M_MONITOR || 1070138568Ssam (ic->ic_flags & IEEE80211_F_SCAN)) 1071138568Ssam nt = &ic->ic_scan; 1072138568Ssam else 1073140753Ssam nt = &ic->ic_sta; 1074138568Ssam /* XXX check ic_bss first in station mode */ 1075138568Ssam /* XXX 4-address frames? */ 1076138568Ssam IEEE80211_NODE_LOCK(nt); 1077138568Ssam if (IS_CTL(wh) && !IS_PSPOLL(wh) /*&& !IS_RTS(ah)*/) 1078138568Ssam ni = _ieee80211_find_node(nt, wh->i_addr1); 1079138568Ssam else 1080138568Ssam ni = _ieee80211_find_node(nt, wh->i_addr2); 1081138568Ssam IEEE80211_NODE_UNLOCK(nt); 1082138568Ssam 1083138568Ssam return (ni != NULL ? ni : ieee80211_ref_node(ic->ic_bss)); 1084138568Ssam#undef IS_PSPOLL 1085138568Ssam#undef IS_CTL 1086138568Ssam} 1087138568Ssam 1088138568Ssam/* 1089127772Ssam * Return a reference to the appropriate node for sending 1090127772Ssam * a data frame. This handles node discovery in adhoc networks. 1091127772Ssam */ 1092127772Ssamstruct ieee80211_node * 1093138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1094138568Ssamieee80211_find_txnode_debug(struct ieee80211com *ic, const u_int8_t *macaddr, 1095138568Ssam const char *func, int line) 1096138568Ssam#else 1097138568Ssamieee80211_find_txnode(struct ieee80211com *ic, const u_int8_t *macaddr) 1098138568Ssam#endif 1099127772Ssam{ 1100140753Ssam struct ieee80211_node_table *nt = &ic->ic_sta; 1101127772Ssam struct ieee80211_node *ni; 1102127772Ssam 1103127772Ssam /* 1104127772Ssam * The destination address should be in the node table 1105127772Ssam * unless we are operating in station mode or this is a 1106127772Ssam * multicast/broadcast frame. 1107127772Ssam */ 1108140753Ssam if (ic->ic_opmode == IEEE80211_M_STA || IEEE80211_IS_MULTICAST(macaddr)) 1109138568Ssam return ieee80211_ref_node(ic->ic_bss); 1110127772Ssam 1111127772Ssam /* XXX can't hold lock across dup_bss 'cuz of recursive locking */ 1112138568Ssam IEEE80211_NODE_LOCK(nt); 1113138568Ssam ni = _ieee80211_find_node(nt, macaddr); 1114138568Ssam IEEE80211_NODE_UNLOCK(nt); 1115138568Ssam 1116138568Ssam if (ni == NULL) { 1117138568Ssam if (ic->ic_opmode == IEEE80211_M_IBSS || 1118140497Ssam ic->ic_opmode == IEEE80211_M_AHDEMO) { 1119140497Ssam /* 1120140497Ssam * In adhoc mode cons up a node for the destination. 1121140497Ssam * Note that we need an additional reference for the 1122140497Ssam * caller to be consistent with _ieee80211_find_node. 1123140497Ssam */ 1124138568Ssam ni = ieee80211_fakeup_adhoc_node(nt, macaddr); 1125140497Ssam if (ni != NULL) 1126140497Ssam (void) ieee80211_ref_node(ni); 1127140497Ssam } else { 1128138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_OUTPUT, 1129138568Ssam "[%s] no node, discard frame (%s)\n", 1130138568Ssam ether_sprintf(macaddr), __func__); 1131138568Ssam ic->ic_stats.is_tx_nonode++; 1132127772Ssam } 1133127772Ssam } 1134127772Ssam return ni; 1135127772Ssam} 1136127772Ssam 1137127772Ssam/* 1138116742Ssam * Like find but search based on the channel too. 1139116742Ssam */ 1140116742Ssamstruct ieee80211_node * 1141138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1142138568Ssamieee80211_find_node_with_channel_debug(struct ieee80211_node_table *nt, 1143138568Ssam const u_int8_t *macaddr, struct ieee80211_channel *chan, 1144138568Ssam const char *func, int line) 1145138568Ssam#else 1146138568Ssamieee80211_find_node_with_channel(struct ieee80211_node_table *nt, 1147138568Ssam const u_int8_t *macaddr, struct ieee80211_channel *chan) 1148138568Ssam#endif 1149116742Ssam{ 1150116742Ssam struct ieee80211_node *ni; 1151116742Ssam int hash; 1152116742Ssam 1153116742Ssam hash = IEEE80211_NODE_HASH(macaddr); 1154138568Ssam IEEE80211_NODE_LOCK(nt); 1155138568Ssam LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1156127772Ssam if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr) && 1157127772Ssam ni->ni_chan == chan) { 1158138568Ssam ieee80211_ref_node(ni); /* mark referenced */ 1159138568Ssam IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE, 1160138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1161140766Ssam "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1162140766Ssam func, line, 1163138568Ssam#else 1164140766Ssam "%s %p<%s> refcnt %d\n", __func__, 1165138568Ssam#endif 1166140766Ssam ni, ether_sprintf(ni->ni_macaddr), 1167140766Ssam ieee80211_node_refcnt(ni)); 1168116742Ssam break; 1169116742Ssam } 1170116742Ssam } 1171138568Ssam IEEE80211_NODE_UNLOCK(nt); 1172116742Ssam return ni; 1173116742Ssam} 1174116742Ssam 1175138568Ssam/* 1176138568Ssam * Like find but search based on the ssid too. 1177138568Ssam */ 1178138568Ssamstruct ieee80211_node * 1179138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1180138568Ssamieee80211_find_node_with_ssid_debug(struct ieee80211_node_table *nt, 1181138568Ssam const u_int8_t *macaddr, u_int ssidlen, const u_int8_t *ssid, 1182138568Ssam const char *func, int line) 1183138568Ssam#else 1184138568Ssamieee80211_find_node_with_ssid(struct ieee80211_node_table *nt, 1185138568Ssam const u_int8_t *macaddr, u_int ssidlen, const u_int8_t *ssid) 1186138568Ssam#endif 1187138568Ssam{ 1188147118Ssam#define MATCH_SSID(ni, ssid, ssidlen) \ 1189147118Ssam (ni->ni_esslen == ssidlen && memcmp(ni->ni_essid, ssid, ssidlen) == 0) 1190147118Ssam static const u_int8_t zeromac[IEEE80211_ADDR_LEN]; 1191138568Ssam struct ieee80211com *ic = nt->nt_ic; 1192138568Ssam struct ieee80211_node *ni; 1193138568Ssam int hash; 1194138568Ssam 1195138568Ssam IEEE80211_NODE_LOCK(nt); 1196147118Ssam /* 1197147118Ssam * A mac address that is all zero means match only the ssid; 1198147118Ssam * otherwise we must match both. 1199147118Ssam */ 1200147118Ssam if (IEEE80211_ADDR_EQ(macaddr, zeromac)) { 1201147118Ssam TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 1202147118Ssam if (MATCH_SSID(ni, ssid, ssidlen)) 1203147118Ssam break; 1204147118Ssam } 1205147118Ssam } else { 1206147118Ssam hash = IEEE80211_NODE_HASH(macaddr); 1207147118Ssam LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1208147118Ssam if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr) && 1209147118Ssam MATCH_SSID(ni, ssid, ssidlen)) 1210147118Ssam break; 1211147118Ssam } 1212147118Ssam } 1213147118Ssam if (ni != NULL) { 1214147118Ssam ieee80211_ref_node(ni); /* mark referenced */ 1215147118Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1216138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1217147118Ssam "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1218147118Ssam func, line, 1219138568Ssam#else 1220147118Ssam "%s %p<%s> refcnt %d\n", __func__, 1221138568Ssam#endif 1222147118Ssam ni, ether_sprintf(ni->ni_macaddr), 1223147118Ssam ieee80211_node_refcnt(ni)); 1224138568Ssam } 1225138568Ssam IEEE80211_NODE_UNLOCK(nt); 1226138568Ssam return ni; 1227147118Ssam#undef MATCH_SSID 1228138568Ssam} 1229138568Ssam 1230116742Ssamstatic void 1231138568Ssam_ieee80211_free_node(struct ieee80211_node *ni) 1232116742Ssam{ 1233138568Ssam struct ieee80211com *ic = ni->ni_ic; 1234138568Ssam struct ieee80211_node_table *nt = ni->ni_table; 1235119150Ssam 1236138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1237140766Ssam "%s %p<%s> in %s table\n", __func__, ni, 1238140766Ssam ether_sprintf(ni->ni_macaddr), 1239138568Ssam nt != NULL ? nt->nt_name : "<gone>"); 1240138568Ssam 1241138568Ssam IEEE80211_AID_CLR(ni->ni_associd, ic->ic_aid_bitmap); 1242138568Ssam if (nt != NULL) { 1243138568Ssam TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1244138568Ssam LIST_REMOVE(ni, ni_hash); 1245138568Ssam } 1246138568Ssam ic->ic_node_free(ni); 1247116742Ssam} 1248116742Ssam 1249116742Ssamvoid 1250138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1251138568Ssamieee80211_free_node_debug(struct ieee80211_node *ni, const char *func, int line) 1252138568Ssam#else 1253138568Ssamieee80211_free_node(struct ieee80211_node *ni) 1254138568Ssam#endif 1255116742Ssam{ 1256138568Ssam struct ieee80211_node_table *nt = ni->ni_table; 1257119150Ssam 1258138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1259140454Ssam IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE, 1260140766Ssam "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni, 1261138568Ssam ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1); 1262138568Ssam#endif 1263138568Ssam if (ieee80211_node_dectestref(ni)) { 1264138568Ssam /* 1265138568Ssam * Beware; if the node is marked gone then it's already 1266138568Ssam * been removed from the table and we cannot assume the 1267138568Ssam * table still exists. Regardless, there's no need to lock 1268138568Ssam * the table. 1269138568Ssam */ 1270138568Ssam if (ni->ni_table != NULL) { 1271138568Ssam IEEE80211_NODE_LOCK(nt); 1272138568Ssam _ieee80211_free_node(ni); 1273138568Ssam IEEE80211_NODE_UNLOCK(nt); 1274138568Ssam } else 1275138568Ssam _ieee80211_free_node(ni); 1276116742Ssam } 1277116742Ssam} 1278116742Ssam 1279138568Ssam/* 1280138568Ssam * Reclaim a node. If this is the last reference count then 1281138568Ssam * do the normal free work. Otherwise remove it from the node 1282138568Ssam * table and mark it gone by clearing the back-reference. 1283138568Ssam */ 1284138568Ssamstatic void 1285138568Ssamnode_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 1286116742Ssam{ 1287138568Ssam 1288140766Ssam IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE, 1289140766Ssam "%s: remove %p<%s> from %s table, refcnt %d\n", 1290140766Ssam __func__, ni, ether_sprintf(ni->ni_macaddr), 1291140766Ssam nt->nt_name, ieee80211_node_refcnt(ni)-1); 1292138568Ssam if (!ieee80211_node_dectestref(ni)) { 1293138568Ssam /* 1294138568Ssam * Other references are present, just remove the 1295138568Ssam * node from the table so it cannot be found. When 1296138568Ssam * the references are dropped storage will be 1297140753Ssam * reclaimed. 1298138568Ssam */ 1299138568Ssam TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1300138568Ssam LIST_REMOVE(ni, ni_hash); 1301138568Ssam ni->ni_table = NULL; /* clear reference */ 1302138568Ssam } else 1303138568Ssam _ieee80211_free_node(ni); 1304138568Ssam} 1305138568Ssam 1306138568Ssamstatic void 1307138568Ssamieee80211_free_allnodes_locked(struct ieee80211_node_table *nt) 1308138568Ssam{ 1309138568Ssam struct ieee80211com *ic = nt->nt_ic; 1310116742Ssam struct ieee80211_node *ni; 1311116742Ssam 1312138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1313138568Ssam "%s: free all nodes in %s table\n", __func__, nt->nt_name); 1314138568Ssam 1315138568Ssam while ((ni = TAILQ_FIRST(&nt->nt_node)) != NULL) { 1316138568Ssam if (ni->ni_associd != 0) { 1317138568Ssam if (ic->ic_auth->ia_node_leave != NULL) 1318138568Ssam ic->ic_auth->ia_node_leave(ic, ni); 1319138568Ssam IEEE80211_AID_CLR(ni->ni_associd, ic->ic_aid_bitmap); 1320138568Ssam } 1321138568Ssam node_reclaim(nt, ni); 1322138568Ssam } 1323138568Ssam ieee80211_reset_erp(ic); 1324116742Ssam} 1325116742Ssam 1326138568Ssamstatic void 1327138568Ssamieee80211_free_allnodes(struct ieee80211_node_table *nt) 1328138568Ssam{ 1329138568Ssam 1330138568Ssam IEEE80211_NODE_LOCK(nt); 1331138568Ssam ieee80211_free_allnodes_locked(nt); 1332138568Ssam IEEE80211_NODE_UNLOCK(nt); 1333138568Ssam} 1334138568Ssam 1335120483Ssam/* 1336138568Ssam * Timeout entries in the scan cache. 1337138568Ssam */ 1338138568Ssamstatic void 1339138568Ssamieee80211_timeout_scan_candidates(struct ieee80211_node_table *nt) 1340138568Ssam{ 1341138568Ssam struct ieee80211com *ic = nt->nt_ic; 1342138568Ssam struct ieee80211_node *ni, *tni; 1343138568Ssam 1344138568Ssam IEEE80211_NODE_LOCK(nt); 1345138568Ssam ni = ic->ic_bss; 1346138568Ssam /* XXX belongs elsewhere */ 1347138568Ssam if (ni->ni_rxfrag[0] != NULL && ticks > ni->ni_rxfragstamp + hz) { 1348138568Ssam m_freem(ni->ni_rxfrag[0]); 1349138568Ssam ni->ni_rxfrag[0] = NULL; 1350138568Ssam } 1351138568Ssam TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, tni) { 1352138568Ssam if (ni->ni_inact && --ni->ni_inact == 0) { 1353138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1354138568Ssam "[%s] scan candidate purged from cache " 1355138568Ssam "(refcnt %u)\n", ether_sprintf(ni->ni_macaddr), 1356140766Ssam ieee80211_node_refcnt(ni)); 1357138568Ssam node_reclaim(nt, ni); 1358138568Ssam } 1359138568Ssam } 1360138568Ssam IEEE80211_NODE_UNLOCK(nt); 1361138568Ssam 1362138568Ssam nt->nt_inact_timer = IEEE80211_INACT_WAIT; 1363138568Ssam} 1364138568Ssam 1365138568Ssam/* 1366138568Ssam * Timeout inactive stations and do related housekeeping. 1367138568Ssam * Note that we cannot hold the node lock while sending a 1368138568Ssam * frame as this would lead to a LOR. Instead we use a 1369138568Ssam * generation number to mark nodes that we've scanned and 1370138568Ssam * drop the lock and restart a scan if we have to time out 1371138568Ssam * a node. Since we are single-threaded by virtue of 1372120483Ssam * controlling the inactivity timer we can be sure this will 1373120483Ssam * process each node only once. 1374120483Ssam */ 1375138568Ssamstatic void 1376138568Ssamieee80211_timeout_stations(struct ieee80211_node_table *nt) 1377116742Ssam{ 1378138568Ssam struct ieee80211com *ic = nt->nt_ic; 1379120483Ssam struct ieee80211_node *ni; 1380138568Ssam u_int gen; 1381148320Ssam int isadhoc; 1382116742Ssam 1383148320Ssam isadhoc = (ic->ic_opmode == IEEE80211_M_IBSS || 1384148320Ssam ic->ic_opmode == IEEE80211_M_AHDEMO); 1385138568Ssam IEEE80211_SCAN_LOCK(nt); 1386138568Ssam gen = nt->nt_scangen++; 1387138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1388140766Ssam "%s: %s scangen %u\n", __func__, nt->nt_name, gen); 1389120483Ssamrestart: 1390138568Ssam IEEE80211_NODE_LOCK(nt); 1391138568Ssam TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 1392120483Ssam if (ni->ni_scangen == gen) /* previously handled */ 1393120483Ssam continue; 1394120483Ssam ni->ni_scangen = gen; 1395138568Ssam /* 1396147788Ssam * Ignore entries for which have yet to receive an 1397147788Ssam * authentication frame. These are transient and 1398147788Ssam * will be reclaimed when the last reference to them 1399147788Ssam * goes away (when frame xmits complete). 1400147788Ssam */ 1401147788Ssam if ((ni->ni_flags & IEEE80211_NODE_AREF) == 0) 1402147788Ssam continue; 1403147788Ssam /* 1404138568Ssam * Free fragment if not needed anymore 1405138568Ssam * (last fragment older than 1s). 1406138568Ssam * XXX doesn't belong here 1407138568Ssam */ 1408138568Ssam if (ni->ni_rxfrag[0] != NULL && 1409138568Ssam ticks > ni->ni_rxfragstamp + hz) { 1410138568Ssam m_freem(ni->ni_rxfrag[0]); 1411138568Ssam ni->ni_rxfrag[0] = NULL; 1412138568Ssam } 1413140498Ssam /* 1414140498Ssam * Special case ourself; we may be idle for extended periods 1415140498Ssam * of time and regardless reclaiming our state is wrong. 1416140498Ssam */ 1417140498Ssam if (ni == ic->ic_bss) 1418140498Ssam continue; 1419138568Ssam ni->ni_inact--; 1420148320Ssam if (ni->ni_associd != 0 || isadhoc) { 1421119150Ssam /* 1422138568Ssam * Age frames on the power save queue. The 1423138568Ssam * aging interval is 4 times the listen 1424138568Ssam * interval specified by the station. This 1425138568Ssam * number is factored into the age calculations 1426138568Ssam * when the frame is placed on the queue. We 1427138568Ssam * store ages as time differences we can check 1428138568Ssam * and/or adjust only the head of the list. 1429138568Ssam */ 1430138568Ssam if (IEEE80211_NODE_SAVEQ_QLEN(ni) != 0) { 1431138568Ssam struct mbuf *m; 1432138568Ssam int discard = 0; 1433138568Ssam 1434138568Ssam IEEE80211_NODE_SAVEQ_LOCK(ni); 1435138568Ssam while (IF_POLL(&ni->ni_savedq, m) != NULL && 1436138568Ssam M_AGE_GET(m) < IEEE80211_INACT_WAIT) { 1437138568SsamIEEE80211_DPRINTF(ic, IEEE80211_MSG_POWER, "[%s] discard frame, age %u\n", ether_sprintf(ni->ni_macaddr), M_AGE_GET(m));/*XXX*/ 1438138568Ssam _IEEE80211_NODE_SAVEQ_DEQUEUE_HEAD(ni, m); 1439138568Ssam m_freem(m); 1440138568Ssam discard++; 1441138568Ssam } 1442138568Ssam if (m != NULL) 1443138568Ssam M_AGE_SUB(m, IEEE80211_INACT_WAIT); 1444138568Ssam IEEE80211_NODE_SAVEQ_UNLOCK(ni); 1445138568Ssam 1446138568Ssam if (discard != 0) { 1447138568Ssam IEEE80211_DPRINTF(ic, 1448138568Ssam IEEE80211_MSG_POWER, 1449138568Ssam "[%s] discard %u frames for age\n", 1450138568Ssam ether_sprintf(ni->ni_macaddr), 1451138568Ssam discard); 1452138568Ssam IEEE80211_NODE_STAT_ADD(ni, 1453138568Ssam ps_discard, discard); 1454138568Ssam if (IEEE80211_NODE_SAVEQ_QLEN(ni) == 0) 1455148304Ssam ic->ic_set_tim(ni, 0); 1456138568Ssam } 1457138568Ssam } 1458138568Ssam /* 1459138568Ssam * Probe the station before time it out. We 1460138568Ssam * send a null data frame which may not be 1461138568Ssam * universally supported by drivers (need it 1462138568Ssam * for ps-poll support so it should be...). 1463138568Ssam */ 1464139528Ssam if (0 < ni->ni_inact && 1465139528Ssam ni->ni_inact <= ic->ic_inact_probe) { 1466148320Ssam IEEE80211_NOTE(ic, 1467148320Ssam IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, 1468148320Ssam ni, "%s", 1469148320Ssam "probe station due to inactivity"); 1470138568Ssam IEEE80211_NODE_UNLOCK(nt); 1471148301Ssam ieee80211_send_nulldata(ni); 1472138568Ssam /* XXX stat? */ 1473138568Ssam goto restart; 1474138568Ssam } 1475138568Ssam } 1476138568Ssam if (ni->ni_inact <= 0) { 1477148320Ssam IEEE80211_NOTE(ic, 1478148320Ssam IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, ni, 1479148320Ssam "station timed out due to inactivity " 1480148320Ssam "(refcnt %u)", ieee80211_node_refcnt(ni)); 1481138568Ssam /* 1482138568Ssam * Send a deauthenticate frame and drop the station. 1483138568Ssam * This is somewhat complicated due to reference counts 1484138568Ssam * and locking. At this point a station will typically 1485138568Ssam * have a reference count of 1. ieee80211_node_leave 1486138568Ssam * will do a "free" of the node which will drop the 1487138568Ssam * reference count. But in the meantime a reference 1488138568Ssam * wil be held by the deauth frame. The actual reclaim 1489138568Ssam * of the node will happen either after the tx is 1490138568Ssam * completed or by ieee80211_node_leave. 1491120483Ssam * 1492138568Ssam * Separately we must drop the node lock before sending 1493138568Ssam * in case the driver takes a lock, as this will result 1494138568Ssam * in LOR between the node lock and the driver lock. 1495119150Ssam */ 1496138568Ssam IEEE80211_NODE_UNLOCK(nt); 1497138568Ssam if (ni->ni_associd != 0) { 1498138568Ssam IEEE80211_SEND_MGMT(ic, ni, 1499138568Ssam IEEE80211_FC0_SUBTYPE_DEAUTH, 1500138568Ssam IEEE80211_REASON_AUTH_EXPIRE); 1501138568Ssam } 1502138568Ssam ieee80211_node_leave(ic, ni); 1503121180Ssam ic->ic_stats.is_node_timeout++; 1504120483Ssam goto restart; 1505120483Ssam } 1506116742Ssam } 1507138568Ssam IEEE80211_NODE_UNLOCK(nt); 1508138568Ssam 1509138568Ssam IEEE80211_SCAN_UNLOCK(nt); 1510138568Ssam 1511138568Ssam nt->nt_inact_timer = IEEE80211_INACT_WAIT; 1512116742Ssam} 1513116742Ssam 1514116742Ssamvoid 1515138568Ssamieee80211_iterate_nodes(struct ieee80211_node_table *nt, ieee80211_iter_func *f, void *arg) 1516116742Ssam{ 1517116742Ssam struct ieee80211_node *ni; 1518138568Ssam u_int gen; 1519116742Ssam 1520138568Ssam IEEE80211_SCAN_LOCK(nt); 1521138568Ssam gen = nt->nt_scangen++; 1522138568Ssamrestart: 1523138568Ssam IEEE80211_NODE_LOCK(nt); 1524138568Ssam TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 1525138568Ssam if (ni->ni_scangen != gen) { 1526138568Ssam ni->ni_scangen = gen; 1527138568Ssam (void) ieee80211_ref_node(ni); 1528138568Ssam IEEE80211_NODE_UNLOCK(nt); 1529138568Ssam (*f)(arg, ni); 1530138568Ssam ieee80211_free_node(ni); 1531138568Ssam goto restart; 1532138568Ssam } 1533138568Ssam } 1534138568Ssam IEEE80211_NODE_UNLOCK(nt); 1535138568Ssam 1536138568Ssam IEEE80211_SCAN_UNLOCK(nt); 1537116742Ssam} 1538138568Ssam 1539138568Ssamvoid 1540138568Ssamieee80211_dump_node(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 1541138568Ssam{ 1542138568Ssam printf("0x%p: mac %s refcnt %d\n", ni, 1543138568Ssam ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)); 1544138568Ssam printf("\tscangen %u authmode %u flags 0x%x\n", 1545138568Ssam ni->ni_scangen, ni->ni_authmode, ni->ni_flags); 1546138568Ssam printf("\tassocid 0x%x txpower %u vlan %u\n", 1547138568Ssam ni->ni_associd, ni->ni_txpower, ni->ni_vlan); 1548138568Ssam printf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n", 1549138568Ssam ni->ni_txseqs[0], 1550138568Ssam ni->ni_rxseqs[0] >> IEEE80211_SEQ_SEQ_SHIFT, 1551138568Ssam ni->ni_rxseqs[0] & IEEE80211_SEQ_FRAG_MASK, 1552138568Ssam ni->ni_rxfragstamp); 1553138568Ssam printf("\trstamp %u rssi %u intval %u capinfo 0x%x\n", 1554138568Ssam ni->ni_rstamp, ni->ni_rssi, ni->ni_intval, ni->ni_capinfo); 1555138568Ssam printf("\tbssid %s essid \"%.*s\" channel %u:0x%x\n", 1556138568Ssam ether_sprintf(ni->ni_bssid), 1557138568Ssam ni->ni_esslen, ni->ni_essid, 1558138568Ssam ni->ni_chan->ic_freq, ni->ni_chan->ic_flags); 1559138568Ssam printf("\tfails %u inact %u txrate %u\n", 1560138568Ssam ni->ni_fails, ni->ni_inact, ni->ni_txrate); 1561138568Ssam} 1562138568Ssam 1563138568Ssamvoid 1564138568Ssamieee80211_dump_nodes(struct ieee80211_node_table *nt) 1565138568Ssam{ 1566138568Ssam ieee80211_iterate_nodes(nt, 1567138568Ssam (ieee80211_iter_func *) ieee80211_dump_node, nt); 1568138568Ssam} 1569138568Ssam 1570138568Ssam/* 1571138568Ssam * Handle a station joining an 11g network. 1572138568Ssam */ 1573138568Ssamstatic void 1574138568Ssamieee80211_node_join_11g(struct ieee80211com *ic, struct ieee80211_node *ni) 1575138568Ssam{ 1576138568Ssam 1577138568Ssam /* 1578138568Ssam * Station isn't capable of short slot time. Bump 1579138568Ssam * the count of long slot time stations and disable 1580138568Ssam * use of short slot time. Note that the actual switch 1581138568Ssam * over to long slot time use may not occur until the 1582138568Ssam * next beacon transmission (per sec. 7.3.1.4 of 11g). 1583138568Ssam */ 1584138568Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 1585138568Ssam ic->ic_longslotsta++; 1586138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1587138568Ssam "[%s] station needs long slot time, count %d\n", 1588138568Ssam ether_sprintf(ni->ni_macaddr), ic->ic_longslotsta); 1589138568Ssam /* XXX vap's w/ conflicting needs won't work */ 1590138568Ssam ieee80211_set_shortslottime(ic, 0); 1591138568Ssam } 1592138568Ssam /* 1593138568Ssam * If the new station is not an ERP station 1594138568Ssam * then bump the counter and enable protection 1595138568Ssam * if configured. 1596138568Ssam */ 1597138568Ssam if (!ieee80211_iserp_rateset(ic, &ni->ni_rates)) { 1598138568Ssam ic->ic_nonerpsta++; 1599138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1600138568Ssam "[%s] station is !ERP, %d non-ERP stations associated\n", 1601138568Ssam ether_sprintf(ni->ni_macaddr), ic->ic_nonerpsta); 1602138568Ssam /* 1603138568Ssam * If protection is configured, enable it. 1604138568Ssam */ 1605138568Ssam if (ic->ic_protmode != IEEE80211_PROT_NONE) { 1606138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1607138568Ssam "%s: enable use of protection\n", __func__); 1608138568Ssam ic->ic_flags |= IEEE80211_F_USEPROT; 1609138568Ssam } 1610138568Ssam /* 1611138568Ssam * If station does not support short preamble 1612138568Ssam * then we must enable use of Barker preamble. 1613138568Ssam */ 1614138568Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) { 1615138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1616138568Ssam "[%s] station needs long preamble\n", 1617138568Ssam ether_sprintf(ni->ni_macaddr)); 1618138568Ssam ic->ic_flags |= IEEE80211_F_USEBARKER; 1619138568Ssam ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; 1620138568Ssam } 1621138568Ssam } else 1622138568Ssam ni->ni_flags |= IEEE80211_NODE_ERP; 1623138568Ssam} 1624138568Ssam 1625138568Ssamvoid 1626138568Ssamieee80211_node_join(struct ieee80211com *ic, struct ieee80211_node *ni, int resp) 1627138568Ssam{ 1628138568Ssam int newassoc; 1629138568Ssam 1630138568Ssam if (ni->ni_associd == 0) { 1631138568Ssam u_int16_t aid; 1632138568Ssam 1633138568Ssam /* 1634138568Ssam * It would be good to search the bitmap 1635138568Ssam * more efficiently, but this will do for now. 1636138568Ssam */ 1637138568Ssam for (aid = 1; aid < ic->ic_max_aid; aid++) { 1638138568Ssam if (!IEEE80211_AID_ISSET(aid, 1639138568Ssam ic->ic_aid_bitmap)) 1640138568Ssam break; 1641138568Ssam } 1642138568Ssam if (aid >= ic->ic_max_aid) { 1643138568Ssam IEEE80211_SEND_MGMT(ic, ni, resp, 1644138568Ssam IEEE80211_REASON_ASSOC_TOOMANY); 1645138568Ssam ieee80211_node_leave(ic, ni); 1646138568Ssam return; 1647138568Ssam } 1648138568Ssam ni->ni_associd = aid | 0xc000; 1649138568Ssam IEEE80211_AID_SET(ni->ni_associd, ic->ic_aid_bitmap); 1650138568Ssam ic->ic_sta_assoc++; 1651138568Ssam newassoc = 1; 1652139522Ssam if (ic->ic_curmode == IEEE80211_MODE_11G || 1653139522Ssam ic->ic_curmode == IEEE80211_MODE_TURBO_G) 1654138568Ssam ieee80211_node_join_11g(ic, ni); 1655138568Ssam } else 1656138568Ssam newassoc = 0; 1657138568Ssam 1658138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, 1659139523Ssam "[%s] station %sassociated at aid %d: %s preamble, %s slot time%s%s\n", 1660139523Ssam ether_sprintf(ni->ni_macaddr), newassoc ? "" : "re", 1661139523Ssam IEEE80211_NODE_AID(ni), 1662139523Ssam ic->ic_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long", 1663139523Ssam ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long", 1664139523Ssam ic->ic_flags & IEEE80211_F_USEPROT ? ", protection" : "", 1665139523Ssam ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "" 1666139523Ssam ); 1667138568Ssam 1668138568Ssam /* give driver a chance to setup state like ni_txrate */ 1669139524Ssam if (ic->ic_newassoc != NULL) 1670148307Ssam ic->ic_newassoc(ni, newassoc); 1671139528Ssam ni->ni_inact_reload = ic->ic_inact_auth; 1672139528Ssam ni->ni_inact = ni->ni_inact_reload; 1673138568Ssam IEEE80211_SEND_MGMT(ic, ni, resp, IEEE80211_STATUS_SUCCESS); 1674138568Ssam /* tell the authenticator about new station */ 1675138568Ssam if (ic->ic_auth->ia_node_join != NULL) 1676138568Ssam ic->ic_auth->ia_node_join(ic, ni); 1677138568Ssam ieee80211_notify_node_join(ic, ni, newassoc); 1678138568Ssam} 1679138568Ssam 1680138568Ssam/* 1681138568Ssam * Handle a station leaving an 11g network. 1682138568Ssam */ 1683138568Ssamstatic void 1684138568Ssamieee80211_node_leave_11g(struct ieee80211com *ic, struct ieee80211_node *ni) 1685138568Ssam{ 1686138568Ssam 1687139522Ssam KASSERT(ic->ic_curmode == IEEE80211_MODE_11G || 1688139522Ssam ic->ic_curmode == IEEE80211_MODE_TURBO_G, 1689138568Ssam ("not in 11g, curmode %x", ic->ic_curmode)); 1690138568Ssam 1691138568Ssam /* 1692138568Ssam * If a long slot station do the slot time bookkeeping. 1693138568Ssam */ 1694138568Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 1695138568Ssam KASSERT(ic->ic_longslotsta > 0, 1696138568Ssam ("bogus long slot station count %d", ic->ic_longslotsta)); 1697138568Ssam ic->ic_longslotsta--; 1698138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1699138568Ssam "[%s] long slot time station leaves, count now %d\n", 1700138568Ssam ether_sprintf(ni->ni_macaddr), ic->ic_longslotsta); 1701138568Ssam if (ic->ic_longslotsta == 0) { 1702138568Ssam /* 1703138568Ssam * Re-enable use of short slot time if supported 1704138568Ssam * and not operating in IBSS mode (per spec). 1705138568Ssam */ 1706138568Ssam if ((ic->ic_caps & IEEE80211_C_SHSLOT) && 1707138568Ssam ic->ic_opmode != IEEE80211_M_IBSS) { 1708138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1709138568Ssam "%s: re-enable use of short slot time\n", 1710138568Ssam __func__); 1711138568Ssam ieee80211_set_shortslottime(ic, 1); 1712138568Ssam } 1713138568Ssam } 1714138568Ssam } 1715138568Ssam /* 1716138568Ssam * If a non-ERP station do the protection-related bookkeeping. 1717138568Ssam */ 1718138568Ssam if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) { 1719138568Ssam KASSERT(ic->ic_nonerpsta > 0, 1720138568Ssam ("bogus non-ERP station count %d", ic->ic_nonerpsta)); 1721138568Ssam ic->ic_nonerpsta--; 1722138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1723138568Ssam "[%s] non-ERP station leaves, count now %d\n", 1724138568Ssam ether_sprintf(ni->ni_macaddr), ic->ic_nonerpsta); 1725138568Ssam if (ic->ic_nonerpsta == 0) { 1726138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1727138568Ssam "%s: disable use of protection\n", __func__); 1728138568Ssam ic->ic_flags &= ~IEEE80211_F_USEPROT; 1729138568Ssam /* XXX verify mode? */ 1730138568Ssam if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) { 1731138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1732138568Ssam "%s: re-enable use of short preamble\n", 1733138568Ssam __func__); 1734138568Ssam ic->ic_flags |= IEEE80211_F_SHPREAMBLE; 1735138568Ssam ic->ic_flags &= ~IEEE80211_F_USEBARKER; 1736138568Ssam } 1737138568Ssam } 1738138568Ssam } 1739138568Ssam} 1740138568Ssam 1741138568Ssam/* 1742138568Ssam * Handle bookkeeping for station deauthentication/disassociation 1743138568Ssam * when operating as an ap. 1744138568Ssam */ 1745138568Ssamvoid 1746138568Ssamieee80211_node_leave(struct ieee80211com *ic, struct ieee80211_node *ni) 1747138568Ssam{ 1748140499Ssam struct ieee80211_node_table *nt = ni->ni_table; 1749138568Ssam 1750138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, 1751138568Ssam "[%s] station with aid %d leaves\n", 1752138568Ssam ether_sprintf(ni->ni_macaddr), IEEE80211_NODE_AID(ni)); 1753138568Ssam 1754138568Ssam KASSERT(ic->ic_opmode == IEEE80211_M_HOSTAP || 1755138568Ssam ic->ic_opmode == IEEE80211_M_IBSS || 1756138568Ssam ic->ic_opmode == IEEE80211_M_AHDEMO, 1757138568Ssam ("unexpected operating mode %u", ic->ic_opmode)); 1758138568Ssam /* 1759138568Ssam * If node wasn't previously associated all 1760138568Ssam * we need to do is reclaim the reference. 1761138568Ssam */ 1762138568Ssam /* XXX ibss mode bypasses 11g and notification */ 1763138568Ssam if (ni->ni_associd == 0) 1764138568Ssam goto done; 1765138568Ssam /* 1766138568Ssam * Tell the authenticator the station is leaving. 1767138568Ssam * Note that we must do this before yanking the 1768138568Ssam * association id as the authenticator uses the 1769138568Ssam * associd to locate it's state block. 1770138568Ssam */ 1771138568Ssam if (ic->ic_auth->ia_node_leave != NULL) 1772138568Ssam ic->ic_auth->ia_node_leave(ic, ni); 1773138568Ssam IEEE80211_AID_CLR(ni->ni_associd, ic->ic_aid_bitmap); 1774138568Ssam ni->ni_associd = 0; 1775138568Ssam ic->ic_sta_assoc--; 1776138568Ssam 1777139522Ssam if (ic->ic_curmode == IEEE80211_MODE_11G || 1778139522Ssam ic->ic_curmode == IEEE80211_MODE_TURBO_G) 1779138568Ssam ieee80211_node_leave_11g(ic, ni); 1780138568Ssam /* 1781138568Ssam * Cleanup station state. In particular clear various 1782138568Ssam * state that might otherwise be reused if the node 1783138568Ssam * is reused before the reference count goes to zero 1784138568Ssam * (and memory is reclaimed). 1785138568Ssam */ 1786138568Ssam ieee80211_sta_leave(ic, ni); 1787138568Ssamdone: 1788140499Ssam /* 1789140499Ssam * Remove the node from any table it's recorded in and 1790140499Ssam * drop the caller's reference. Removal from the table 1791140499Ssam * is important to insure the node is not reprocessed 1792140499Ssam * for inactivity. 1793140499Ssam */ 1794140499Ssam if (nt != NULL) { 1795140499Ssam IEEE80211_NODE_LOCK(nt); 1796140499Ssam node_reclaim(nt, ni); 1797140499Ssam IEEE80211_NODE_UNLOCK(nt); 1798140499Ssam } else 1799140499Ssam ieee80211_free_node(ni); 1800138568Ssam} 1801138568Ssam 1802138568Ssamu_int8_t 1803138568Ssamieee80211_getrssi(struct ieee80211com *ic) 1804138568Ssam{ 1805138568Ssam#define NZ(x) ((x) == 0 ? 1 : (x)) 1806140753Ssam struct ieee80211_node_table *nt = &ic->ic_sta; 1807138568Ssam u_int32_t rssi_samples, rssi_total; 1808138568Ssam struct ieee80211_node *ni; 1809138568Ssam 1810138568Ssam rssi_total = 0; 1811138568Ssam rssi_samples = 0; 1812138568Ssam switch (ic->ic_opmode) { 1813138568Ssam case IEEE80211_M_IBSS: /* average of all ibss neighbors */ 1814138568Ssam /* XXX locking */ 1815140753Ssam TAILQ_FOREACH(ni, &nt->nt_node, ni_list) 1816138568Ssam if (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) { 1817138568Ssam rssi_samples++; 1818138568Ssam rssi_total += ic->ic_node_getrssi(ni); 1819138568Ssam } 1820138568Ssam break; 1821138568Ssam case IEEE80211_M_AHDEMO: /* average of all neighbors */ 1822138568Ssam /* XXX locking */ 1823140753Ssam TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 1824138568Ssam rssi_samples++; 1825138568Ssam rssi_total += ic->ic_node_getrssi(ni); 1826138568Ssam } 1827138568Ssam break; 1828138568Ssam case IEEE80211_M_HOSTAP: /* average of all associated stations */ 1829138568Ssam /* XXX locking */ 1830140753Ssam TAILQ_FOREACH(ni, &nt->nt_node, ni_list) 1831138568Ssam if (IEEE80211_AID(ni->ni_associd) != 0) { 1832138568Ssam rssi_samples++; 1833138568Ssam rssi_total += ic->ic_node_getrssi(ni); 1834138568Ssam } 1835138568Ssam break; 1836138568Ssam case IEEE80211_M_MONITOR: /* XXX */ 1837138568Ssam case IEEE80211_M_STA: /* use stats from associated ap */ 1838138568Ssam default: 1839138568Ssam if (ic->ic_bss != NULL) 1840138568Ssam rssi_total = ic->ic_node_getrssi(ic->ic_bss); 1841138568Ssam rssi_samples = 1; 1842138568Ssam break; 1843138568Ssam } 1844138568Ssam return rssi_total / NZ(rssi_samples); 1845138568Ssam#undef NZ 1846138568Ssam} 1847138568Ssam 1848138568Ssam/* 1849138568Ssam * Indicate whether there are frames queued for a station in power-save mode. 1850138568Ssam */ 1851138568Ssamstatic void 1852148304Ssamieee80211_set_tim(struct ieee80211_node *ni, int set) 1853138568Ssam{ 1854148304Ssam struct ieee80211com *ic = ni->ni_ic; 1855138568Ssam u_int16_t aid; 1856138568Ssam 1857138568Ssam KASSERT(ic->ic_opmode == IEEE80211_M_HOSTAP || 1858138568Ssam ic->ic_opmode == IEEE80211_M_IBSS, 1859138568Ssam ("operating mode %u", ic->ic_opmode)); 1860138568Ssam 1861138568Ssam aid = IEEE80211_AID(ni->ni_associd); 1862138568Ssam KASSERT(aid < ic->ic_max_aid, 1863138568Ssam ("bogus aid %u, max %u", aid, ic->ic_max_aid)); 1864138568Ssam 1865138568Ssam IEEE80211_BEACON_LOCK(ic); 1866138568Ssam if (set != (isset(ic->ic_tim_bitmap, aid) != 0)) { 1867138568Ssam if (set) { 1868138568Ssam setbit(ic->ic_tim_bitmap, aid); 1869138568Ssam ic->ic_ps_pending++; 1870138568Ssam } else { 1871138568Ssam clrbit(ic->ic_tim_bitmap, aid); 1872138568Ssam ic->ic_ps_pending--; 1873138568Ssam } 1874138568Ssam ic->ic_flags |= IEEE80211_F_TIMUPDATE; 1875138568Ssam } 1876138568Ssam IEEE80211_BEACON_UNLOCK(ic); 1877138568Ssam} 1878138568Ssam 1879138568Ssam/* 1880138568Ssam * Node table support. 1881138568Ssam */ 1882138568Ssam 1883138568Ssamstatic void 1884138568Ssamieee80211_node_table_init(struct ieee80211com *ic, 1885138568Ssam struct ieee80211_node_table *nt, 1886138568Ssam const char *name, int inact, 1887138568Ssam void (*timeout)(struct ieee80211_node_table *)) 1888138568Ssam{ 1889138568Ssam 1890138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1891138568Ssam "%s %s table, inact %u\n", __func__, name, inact); 1892138568Ssam 1893138568Ssam nt->nt_ic = ic; 1894138568Ssam /* XXX need unit */ 1895138568Ssam IEEE80211_NODE_LOCK_INIT(nt, ic->ic_ifp->if_xname); 1896138568Ssam IEEE80211_SCAN_LOCK_INIT(nt, ic->ic_ifp->if_xname); 1897138568Ssam TAILQ_INIT(&nt->nt_node); 1898138568Ssam nt->nt_name = name; 1899138568Ssam nt->nt_scangen = 1; 1900138568Ssam nt->nt_inact_init = inact; 1901138568Ssam nt->nt_timeout = timeout; 1902138568Ssam} 1903138568Ssam 1904138568Ssamvoid 1905138568Ssamieee80211_node_table_reset(struct ieee80211_node_table *nt) 1906138568Ssam{ 1907138568Ssam 1908138568Ssam IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE, 1909138568Ssam "%s %s table\n", __func__, nt->nt_name); 1910138568Ssam 1911138568Ssam IEEE80211_NODE_LOCK(nt); 1912138568Ssam nt->nt_inact_timer = 0; 1913138568Ssam ieee80211_free_allnodes_locked(nt); 1914138568Ssam IEEE80211_NODE_UNLOCK(nt); 1915138568Ssam} 1916138568Ssam 1917138568Ssamstatic void 1918138568Ssamieee80211_node_table_cleanup(struct ieee80211_node_table *nt) 1919138568Ssam{ 1920138568Ssam 1921138568Ssam IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE, 1922138568Ssam "%s %s table\n", __func__, nt->nt_name); 1923138568Ssam 1924138568Ssam ieee80211_free_allnodes_locked(nt); 1925138568Ssam IEEE80211_SCAN_LOCK_DESTROY(nt); 1926138568Ssam IEEE80211_NODE_LOCK_DESTROY(nt); 1927138568Ssam} 1928