ieee80211_node.c revision 140441
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 140441 2005-01-18 19:59:40Z 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 struct ieee80211_node_table *ieee80211_node_table_alloc( 72138568Ssam struct ieee80211com *ic, const char *name, int inact, 73138568Ssam void (*timeout)(struct ieee80211_node_table *)); 74138568Ssamstatic void ieee80211_node_table_cleanup(struct ieee80211_node_table *nt); 75138568Ssam 76127876SsamMALLOC_DEFINE(M_80211_NODE, "80211node", "802.11 node state"); 77120481Ssam 78116742Ssamvoid 79138568Ssamieee80211_node_attach(struct ieee80211com *ic) 80116742Ssam{ 81116742Ssam 82138568Ssam ic->ic_sta = NULL; /* defer to when we need it */ 83138568Ssam ieee80211_node_table_init(ic, &ic->ic_scan, "scan", 84138568Ssam IEEE80211_INACT_SCAN, ieee80211_timeout_scan_candidates); 85138568Ssam 86138568Ssam ic->ic_node_alloc = node_alloc; 87138568Ssam ic->ic_node_free = node_free; 88138568Ssam ic->ic_node_cleanup = node_cleanup; 89138568Ssam ic->ic_node_getrssi = node_getrssi; 90138568Ssam 91138568Ssam /* default station inactivity timer setings */ 92138568Ssam ic->ic_inact_init = IEEE80211_INACT_INIT; 93138568Ssam ic->ic_inact_auth = IEEE80211_INACT_AUTH; 94138568Ssam ic->ic_inact_run = IEEE80211_INACT_RUN; 95138568Ssam ic->ic_inact_probe = IEEE80211_INACT_PROBE; 96138568Ssam 97138568Ssam /* XXX defer */ 98138568Ssam if (ic->ic_max_aid == 0) 99138568Ssam ic->ic_max_aid = IEEE80211_AID_DEF; 100138568Ssam else if (ic->ic_max_aid > IEEE80211_AID_MAX) 101138568Ssam ic->ic_max_aid = IEEE80211_AID_MAX; 102138568Ssam MALLOC(ic->ic_aid_bitmap, u_int32_t *, 103138568Ssam howmany(ic->ic_max_aid, 32) * sizeof(u_int32_t), 104138568Ssam M_DEVBUF, M_NOWAIT | M_ZERO); 105138568Ssam if (ic->ic_aid_bitmap == NULL) { 106138568Ssam /* XXX no way to recover */ 107138568Ssam printf("%s: no memory for AID bitmap!\n", __func__); 108138568Ssam ic->ic_max_aid = 0; 109138568Ssam } 110138568Ssam 111138568Ssam /* XXX defer until using hostap/ibss mode */ 112138568Ssam ic->ic_tim_len = howmany(ic->ic_max_aid, 8) * sizeof(u_int8_t); 113138568Ssam MALLOC(ic->ic_tim_bitmap, u_int8_t *, ic->ic_tim_len, 114138568Ssam M_DEVBUF, M_NOWAIT | M_ZERO); 115138568Ssam if (ic->ic_tim_bitmap == NULL) { 116138568Ssam /* XXX no way to recover */ 117138568Ssam printf("%s: no memory for TIM bitmap!\n", __func__); 118138568Ssam } 119138568Ssam ic->ic_set_tim = ieee80211_set_tim; /* NB: driver should override */ 120118887Ssam} 121118887Ssam 122118887Ssamvoid 123138568Ssamieee80211_node_lateattach(struct ieee80211com *ic) 124118887Ssam{ 125127766Ssam struct ieee80211_node *ni; 126138568Ssam struct ieee80211_rsnparms *rsn; 127118887Ssam 128138568Ssam ni = ieee80211_alloc_node(&ic->ic_scan, ic->ic_myaddr); 129127766Ssam KASSERT(ni != NULL, ("unable to setup inital BSS node")); 130138568Ssam /* 131138568Ssam * Setup "global settings" in the bss node so that 132138568Ssam * each new station automatically inherits them. 133138568Ssam */ 134138568Ssam rsn = &ni->ni_rsn; 135138568Ssam /* WEP, TKIP, and AES-CCM are always supported */ 136138568Ssam rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_WEP; 137138568Ssam rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_TKIP; 138138568Ssam rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_AES_CCM; 139138568Ssam if (ic->ic_caps & IEEE80211_C_AES) 140138568Ssam rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_AES_OCB; 141138568Ssam if (ic->ic_caps & IEEE80211_C_CKIP) 142138568Ssam rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_CKIP; 143138568Ssam /* 144138568Ssam * Default unicast cipher to WEP for 802.1x use. If 145138568Ssam * WPA is enabled the management code will set these 146138568Ssam * values to reflect. 147138568Ssam */ 148138568Ssam rsn->rsn_ucastcipher = IEEE80211_CIPHER_WEP; 149138568Ssam rsn->rsn_ucastkeylen = 104 / NBBY; 150138568Ssam /* 151138568Ssam * WPA says the multicast cipher is the lowest unicast 152138568Ssam * cipher supported. But we skip WEP which would 153138568Ssam * otherwise be used based on this criteria. 154138568Ssam */ 155138568Ssam rsn->rsn_mcastcipher = IEEE80211_CIPHER_TKIP; 156138568Ssam rsn->rsn_mcastkeylen = 128 / NBBY; 157138568Ssam 158138568Ssam /* 159138568Ssam * We support both WPA-PSK and 802.1x; the one used 160138568Ssam * is determined by the authentication mode and the 161138568Ssam * setting of the PSK state. 162138568Ssam */ 163138568Ssam rsn->rsn_keymgmtset = WPA_ASE_8021X_UNSPEC | WPA_ASE_8021X_PSK; 164138568Ssam rsn->rsn_keymgmt = WPA_ASE_8021X_PSK; 165138568Ssam 166138568Ssam ic->ic_bss = ieee80211_ref_node(ni); /* hold reference */ 167138568Ssam ic->ic_auth = ieee80211_authenticator_get(ni->ni_authmode); 168116742Ssam} 169116742Ssam 170116742Ssamvoid 171138568Ssamieee80211_node_detach(struct ieee80211com *ic) 172116742Ssam{ 173116742Ssam 174138568Ssam if (ic->ic_bss != NULL) { 175138568Ssam ieee80211_free_node(ic->ic_bss); 176138568Ssam ic->ic_bss = NULL; 177138568Ssam } 178138568Ssam ieee80211_node_table_cleanup(&ic->ic_scan); 179138568Ssam if (ic->ic_sta != NULL) { 180138568Ssam ieee80211_node_table_free(ic->ic_sta); 181138568Ssam ic->ic_sta = NULL; 182138568Ssam } 183138568Ssam if (ic->ic_aid_bitmap != NULL) { 184138568Ssam FREE(ic->ic_aid_bitmap, M_DEVBUF); 185138568Ssam ic->ic_aid_bitmap = NULL; 186138568Ssam } 187138568Ssam if (ic->ic_tim_bitmap != NULL) { 188138568Ssam FREE(ic->ic_tim_bitmap, M_DEVBUF); 189138568Ssam ic->ic_tim_bitmap = NULL; 190138568Ssam } 191116742Ssam} 192116742Ssam 193138568Ssam/* 194138568Ssam * Port authorize/unauthorize interfaces for use by an authenticator. 195138568Ssam */ 196138568Ssam 197138568Ssamvoid 198138568Ssamieee80211_node_authorize(struct ieee80211com *ic, struct ieee80211_node *ni) 199138568Ssam{ 200138568Ssam ni->ni_flags |= IEEE80211_NODE_AUTH; 201139528Ssam ni->ni_inact_reload = ic->ic_inact_run; 202138568Ssam} 203138568Ssam 204138568Ssamvoid 205138568Ssamieee80211_node_unauthorize(struct ieee80211com *ic, struct ieee80211_node *ni) 206138568Ssam{ 207138568Ssam ni->ni_flags &= ~IEEE80211_NODE_AUTH; 208138568Ssam} 209138568Ssam 210116742Ssam/* 211138568Ssam * Set/change the channel. The rate set is also updated as 212138568Ssam * to insure a consistent view by drivers. 213138568Ssam */ 214138568Ssamstatic __inline void 215138568Ssamieee80211_set_chan(struct ieee80211com *ic, 216138568Ssam struct ieee80211_node *ni, struct ieee80211_channel *chan) 217138568Ssam{ 218138568Ssam ni->ni_chan = chan; 219138568Ssam ni->ni_rates = ic->ic_sup_rates[ieee80211_chan2mode(ic, chan)]; 220138568Ssam} 221138568Ssam 222138568Ssam/* 223116742Ssam * AP scanning support. 224116742Ssam */ 225116742Ssam 226138568Ssam#ifdef IEEE80211_DEBUG 227138568Ssamstatic void 228138568Ssamdump_chanlist(const u_char chans[]) 229138568Ssam{ 230138568Ssam const char *sep; 231138568Ssam int i; 232138568Ssam 233138568Ssam sep = " "; 234138568Ssam for (i = 0; i < IEEE80211_CHAN_MAX; i++) 235138568Ssam if (isset(chans, i)) { 236138568Ssam printf("%s%u", sep, i); 237138568Ssam sep = ", "; 238138568Ssam } 239138568Ssam} 240138568Ssam#endif /* IEEE80211_DEBUG */ 241138568Ssam 242116742Ssam/* 243138568Ssam * Initialize the channel set to scan based on the 244116742Ssam * of available channels and the current PHY mode. 245116742Ssam */ 246117811Ssamstatic void 247138568Ssamieee80211_reset_scan(struct ieee80211com *ic) 248116742Ssam{ 249116742Ssam 250138568Ssam /* XXX ic_des_chan should be handled with ic_chan_active */ 251138568Ssam if (ic->ic_des_chan != IEEE80211_CHAN_ANYC) { 252138568Ssam memset(ic->ic_chan_scan, 0, sizeof(ic->ic_chan_scan)); 253138568Ssam setbit(ic->ic_chan_scan, 254138568Ssam ieee80211_chan2ieee(ic, ic->ic_des_chan)); 255138568Ssam } else 256138568Ssam memcpy(ic->ic_chan_scan, ic->ic_chan_active, 257138568Ssam sizeof(ic->ic_chan_active)); 258117811Ssam /* NB: hack, setup so next_scan starts with the first channel */ 259117811Ssam if (ic->ic_bss->ni_chan == IEEE80211_CHAN_ANYC) 260138568Ssam ieee80211_set_chan(ic, ic->ic_bss, 261138568Ssam &ic->ic_channels[IEEE80211_CHAN_MAX]); 262138568Ssam#ifdef IEEE80211_DEBUG 263138568Ssam if (ieee80211_msg_scan(ic)) { 264138568Ssam printf("%s: scan set:", __func__); 265138568Ssam dump_chanlist(ic->ic_chan_scan); 266138568Ssam printf(" start chan %u\n", 267138568Ssam ieee80211_chan2ieee(ic, ic->ic_bss->ni_chan)); 268138568Ssam } 269138568Ssam#endif /* IEEE80211_DEBUG */ 270116742Ssam} 271116742Ssam 272116742Ssam/* 273116742Ssam * Begin an active scan. 274116742Ssam */ 275116742Ssamvoid 276138568Ssamieee80211_begin_scan(struct ieee80211com *ic, int reset) 277116742Ssam{ 278116742Ssam 279138568Ssam ic->ic_scan.nt_scangen++; 280117811Ssam /* 281117811Ssam * In all but hostap mode scanning starts off in 282117811Ssam * an active mode before switching to passive. 283117811Ssam */ 284121180Ssam if (ic->ic_opmode != IEEE80211_M_HOSTAP) { 285117811Ssam ic->ic_flags |= IEEE80211_F_ASCAN; 286121180Ssam ic->ic_stats.is_scan_active++; 287121180Ssam } else 288121180Ssam ic->ic_stats.is_scan_passive++; 289139520Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, 290139520Ssam "begin %s scan in %s mode, scangen %u\n", 291138568Ssam (ic->ic_flags & IEEE80211_F_ASCAN) ? "active" : "passive", 292139520Ssam ieee80211_phymode_name[ic->ic_curmode], ic->ic_scan.nt_scangen); 293116742Ssam /* 294138568Ssam * Clear scan state and flush any previously seen AP's. 295116742Ssam */ 296138568Ssam ieee80211_reset_scan(ic); 297138568Ssam if (reset) 298138568Ssam ieee80211_free_allnodes(&ic->ic_scan); 299116742Ssam 300138568Ssam ic->ic_flags |= IEEE80211_F_SCAN; 301138568Ssam 302117811Ssam /* Scan the next channel. */ 303138568Ssam ieee80211_next_scan(ic); 304116742Ssam} 305116742Ssam 306116742Ssam/* 307116742Ssam * Switch to the next channel marked for scanning. 308116742Ssam */ 309138568Ssamint 310138568Ssamieee80211_next_scan(struct ieee80211com *ic) 311116742Ssam{ 312116742Ssam struct ieee80211_channel *chan; 313116742Ssam 314138568Ssam /* 315138568Ssam * Insure any previous mgt frame timeouts don't fire. 316138568Ssam * This assumes the driver does the right thing in 317138568Ssam * flushing anything queued in the driver and below. 318138568Ssam */ 319138568Ssam ic->ic_mgt_timer = 0; 320138568Ssam 321116742Ssam chan = ic->ic_bss->ni_chan; 322138568Ssam do { 323116742Ssam if (++chan > &ic->ic_channels[IEEE80211_CHAN_MAX]) 324116742Ssam chan = &ic->ic_channels[0]; 325116742Ssam if (isset(ic->ic_chan_scan, ieee80211_chan2ieee(ic, chan))) { 326138568Ssam clrbit(ic->ic_chan_scan, ieee80211_chan2ieee(ic, chan)); 327138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, 328138568Ssam "%s: chan %d->%d\n", __func__, 329138568Ssam ieee80211_chan2ieee(ic, ic->ic_bss->ni_chan), 330138568Ssam ieee80211_chan2ieee(ic, chan)); 331138568Ssam ieee80211_set_chan(ic, ic->ic_bss, chan); 332138568Ssam#ifdef notyet 333138568Ssam /* XXX driver state change */ 334116742Ssam /* 335138568Ssam * Scan next channel. If doing an active scan 336138568Ssam * and the channel is not marked passive-only 337138568Ssam * then send a probe request. Otherwise just 338138568Ssam * listen for beacons on the channel. 339116742Ssam */ 340138568Ssam if ((ic->ic_flags & IEEE80211_F_ASCAN) && 341138568Ssam (ni->ni_chan->ic_flags & IEEE80211_CHAN_PASSIVE) == 0) { 342138568Ssam IEEE80211_SEND_MGMT(ic, ni, 343138568Ssam IEEE80211_FC0_SUBTYPE_PROBE_REQ, 0); 344138568Ssam } 345138568Ssam#else 346138568Ssam ieee80211_new_state(ic, IEEE80211_S_SCAN, -1); 347138568Ssam#endif 348138568Ssam return 1; 349116742Ssam } 350138568Ssam } while (chan != ic->ic_bss->ni_chan); 351138568Ssam ieee80211_end_scan(ic); 352138568Ssam return 0; 353116742Ssam} 354116742Ssam 355116742Ssamvoid 356116742Ssamieee80211_create_ibss(struct ieee80211com* ic, struct ieee80211_channel *chan) 357116742Ssam{ 358116742Ssam struct ieee80211_node *ni; 359116742Ssam 360138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, 361138568Ssam "%s: creating ibss\n", __func__); 362138568Ssam 363138568Ssam /* 364138568Ssam * Create the station/neighbor table. Note that for adhoc 365138568Ssam * mode we make the initial inactivity timer longer since 366138568Ssam * we create nodes only through discovery and they typically 367138568Ssam * are long-lived associations. 368138568Ssam */ 369138568Ssam if (ic->ic_opmode == IEEE80211_M_HOSTAP) 370138568Ssam ic->ic_sta = ieee80211_node_table_alloc(ic, 371138568Ssam "station", ic->ic_inact_init, 372138568Ssam ieee80211_timeout_stations); 373138568Ssam else 374138568Ssam ic->ic_sta = ieee80211_node_table_alloc(ic, 375138568Ssam "neighbor", ic->ic_inact_run, 376138568Ssam ieee80211_timeout_stations); 377138568Ssam if (ic->ic_sta == NULL) { 378138568Ssam /* 379138568Ssam * Should remain in SCAN state and retry. 380138568Ssam */ 381138568Ssam /* XXX stat+msg */ 382138568Ssam return; 383138568Ssam } 384138568Ssam 385116742Ssam ni = ic->ic_bss; 386116742Ssam IEEE80211_ADDR_COPY(ni->ni_macaddr, ic->ic_myaddr); 387116742Ssam IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_myaddr); 388116742Ssam ni->ni_esslen = ic->ic_des_esslen; 389116742Ssam memcpy(ni->ni_essid, ic->ic_des_essid, ni->ni_esslen); 390116742Ssam ni->ni_rssi = 0; 391116742Ssam ni->ni_rstamp = 0; 392138568Ssam ni->ni_tstamp.tsf = 0; 393116742Ssam ni->ni_intval = ic->ic_lintval; 394138568Ssam ni->ni_capinfo = 0; 395138568Ssam ni->ni_erp = 0; 396138568Ssam if (ic->ic_flags & IEEE80211_F_PRIVACY) 397116742Ssam ni->ni_capinfo |= IEEE80211_CAPINFO_PRIVACY; 398116742Ssam if (ic->ic_phytype == IEEE80211_T_FH) { 399116742Ssam ni->ni_fhdwell = 200; /* XXX */ 400116742Ssam ni->ni_fhindex = 1; 401116742Ssam } 402138568Ssam if (ic->ic_opmode == IEEE80211_M_IBSS) { 403138568Ssam ic->ic_flags |= IEEE80211_F_SIBSS; 404138568Ssam ni->ni_capinfo |= IEEE80211_CAPINFO_IBSS; /* XXX */ 405138568Ssam 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 /* 427138568Ssam * Set the erp state (mostly the slot time) to deal with 428138568Ssam * the auto-select case; this should be redundant if the 429138568Ssam * mode is locked. 430138568Ssam */ 431138568Ssam ieee80211_reset_erp(ic); 432138568Ssam ieee80211_wme_initparams(ic); 433138568Ssam 434117811Ssam ieee80211_new_state(ic, IEEE80211_S_RUN, -1); 435116742Ssam} 436116742Ssam 437138568Ssamvoid 438138568Ssamieee80211_reset_bss(struct ieee80211com *ic) 439138568Ssam{ 440138568Ssam struct ieee80211_node *ni, *obss; 441138568Ssam 442138568Ssam ieee80211_node_table_reset(&ic->ic_scan); 443138568Ssam ni = ieee80211_alloc_node(&ic->ic_scan, ic->ic_myaddr); 444138568Ssam KASSERT(ni != NULL, ("unable to setup inital BSS node")); 445138568Ssam obss = ic->ic_bss; 446138568Ssam ic->ic_bss = ieee80211_ref_node(ni); 447138568Ssam if (obss != NULL) 448138568Ssam ieee80211_free_node(obss); 449138568Ssam if (ic->ic_sta != NULL) { 450138568Ssam ieee80211_node_table_free(ic->ic_sta); 451138568Ssam ic->ic_sta = NULL; 452138568Ssam } 453138568Ssam} 454138568Ssam 455127767Ssamstatic int 456138568Ssamieee80211_match_bss(struct ieee80211com *ic, struct ieee80211_node *ni) 457127767Ssam{ 458127767Ssam u_int8_t rate; 459127767Ssam int fail; 460127767Ssam 461127767Ssam fail = 0; 462127767Ssam if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 463127767Ssam fail |= 0x01; 464127767Ssam if (ic->ic_des_chan != IEEE80211_CHAN_ANYC && 465127767Ssam ni->ni_chan != ic->ic_des_chan) 466127767Ssam fail |= 0x01; 467127767Ssam if (ic->ic_opmode == IEEE80211_M_IBSS) { 468127767Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 469127767Ssam fail |= 0x02; 470127767Ssam } else { 471127767Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 472127767Ssam fail |= 0x02; 473127767Ssam } 474138568Ssam if (ic->ic_flags & IEEE80211_F_PRIVACY) { 475127767Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 476127767Ssam fail |= 0x04; 477127767Ssam } else { 478127767Ssam /* XXX does this mean privacy is supported or required? */ 479127767Ssam if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 480127767Ssam fail |= 0x04; 481127767Ssam } 482140440Ssam rate = ieee80211_fix_rate(ic, ni, 483140440Ssam IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 484127767Ssam if (rate & IEEE80211_RATE_BASIC) 485127767Ssam fail |= 0x08; 486127767Ssam if (ic->ic_des_esslen != 0 && 487127767Ssam (ni->ni_esslen != ic->ic_des_esslen || 488127767Ssam memcmp(ni->ni_essid, ic->ic_des_essid, ic->ic_des_esslen) != 0)) 489127767Ssam fail |= 0x10; 490127767Ssam if ((ic->ic_flags & IEEE80211_F_DESBSSID) && 491127767Ssam !IEEE80211_ADDR_EQ(ic->ic_des_bssid, ni->ni_bssid)) 492127767Ssam fail |= 0x20; 493127767Ssam#ifdef IEEE80211_DEBUG 494138568Ssam if (ieee80211_msg_scan(ic)) { 495127767Ssam printf(" %c %s", fail ? '-' : '+', 496127767Ssam ether_sprintf(ni->ni_macaddr)); 497127767Ssam printf(" %s%c", ether_sprintf(ni->ni_bssid), 498127767Ssam fail & 0x20 ? '!' : ' '); 499127767Ssam printf(" %3d%c", ieee80211_chan2ieee(ic, ni->ni_chan), 500127767Ssam fail & 0x01 ? '!' : ' '); 501127767Ssam printf(" %+4d", ni->ni_rssi); 502127767Ssam printf(" %2dM%c", (rate & IEEE80211_RATE_VAL) / 2, 503127767Ssam fail & 0x08 ? '!' : ' '); 504127767Ssam printf(" %4s%c", 505127767Ssam (ni->ni_capinfo & IEEE80211_CAPINFO_ESS) ? "ess" : 506127767Ssam (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) ? "ibss" : 507127767Ssam "????", 508127767Ssam fail & 0x02 ? '!' : ' '); 509127767Ssam printf(" %3s%c ", 510127767Ssam (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) ? 511127767Ssam "wep" : "no", 512127767Ssam fail & 0x04 ? '!' : ' '); 513127767Ssam ieee80211_print_essid(ni->ni_essid, ni->ni_esslen); 514127767Ssam printf("%s\n", fail & 0x10 ? "!" : ""); 515127767Ssam } 516127767Ssam#endif 517127767Ssam return fail; 518127767Ssam} 519127767Ssam 520138568Ssamstatic __inline u_int8_t 521138568Ssammaxrate(const struct ieee80211_node *ni) 522138568Ssam{ 523138568Ssam const struct ieee80211_rateset *rs = &ni->ni_rates; 524138568Ssam /* NB: assumes rate set is sorted (happens on frame receive) */ 525138568Ssam return rs->rs_rates[rs->rs_nrates-1] & IEEE80211_RATE_VAL; 526138568Ssam} 527138568Ssam 528116742Ssam/* 529138568Ssam * Compare the capabilities of two nodes and decide which is 530138568Ssam * more desirable (return >0 if a is considered better). Note 531138568Ssam * that we assume compatibility/usability has already been checked 532138568Ssam * so we don't need to (e.g. validate whether privacy is supported). 533138568Ssam * Used to select the best scan candidate for association in a BSS. 534138568Ssam */ 535138568Ssamstatic int 536138568Ssamieee80211_node_compare(struct ieee80211com *ic, 537138568Ssam const struct ieee80211_node *a, 538138568Ssam const struct ieee80211_node *b) 539138568Ssam{ 540138568Ssam u_int8_t maxa, maxb; 541138568Ssam u_int8_t rssia, rssib; 542138568Ssam 543138568Ssam /* privacy support preferred */ 544138568Ssam if ((a->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) && 545138568Ssam (b->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 546138568Ssam return 1; 547138568Ssam if ((a->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0 && 548138568Ssam (b->ni_capinfo & IEEE80211_CAPINFO_PRIVACY)) 549138568Ssam return -1; 550138568Ssam 551138568Ssam rssia = ic->ic_node_getrssi(a); 552138568Ssam rssib = ic->ic_node_getrssi(b); 553139543Ssam if (abs(rssib - rssia) < 5) { 554139543Ssam /* best/max rate preferred if signal level close enough XXX */ 555139543Ssam maxa = maxrate(a); 556139543Ssam maxb = maxrate(b); 557139543Ssam if (maxa != maxb) 558139543Ssam return maxa - maxb; 559139543Ssam /* XXX use freq for channel preference */ 560139543Ssam /* for now just prefer 5Ghz band to all other bands */ 561139543Ssam if (IEEE80211_IS_CHAN_5GHZ(a->ni_chan) && 562139543Ssam !IEEE80211_IS_CHAN_5GHZ(b->ni_chan)) 563139543Ssam return 1; 564139543Ssam if (!IEEE80211_IS_CHAN_5GHZ(a->ni_chan) && 565139543Ssam IEEE80211_IS_CHAN_5GHZ(b->ni_chan)) 566139543Ssam return -1; 567139543Ssam } 568138568Ssam /* all things being equal, use signal level */ 569138568Ssam return rssia - rssib; 570138568Ssam} 571138568Ssam 572138568Ssam/* 573140441Ssam * Mark an ongoing scan stopped. 574140441Ssam */ 575140441Ssamvoid 576140441Ssamieee80211_cancel_scan(struct ieee80211com *ic) 577140441Ssam{ 578140441Ssam 579140441Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, "%s: end %s scan\n", 580140441Ssam __func__, 581140441Ssam (ic->ic_flags & IEEE80211_F_ASCAN) ? "active" : "passive"); 582140441Ssam 583140441Ssam ic->ic_flags &= ~(IEEE80211_F_SCAN | IEEE80211_F_ASCAN); 584140441Ssam} 585140441Ssam 586140441Ssam/* 587116742Ssam * Complete a scan of potential channels. 588116742Ssam */ 589116742Ssamvoid 590138568Ssamieee80211_end_scan(struct ieee80211com *ic) 591116742Ssam{ 592116742Ssam struct ieee80211_node *ni, *nextbs, *selbs; 593138568Ssam struct ieee80211_node_table *nt; 594116742Ssam 595140441Ssam ieee80211_cancel_scan(ic); 596140441Ssam ieee80211_notify_scan_done(ic); 597116742Ssam 598138568Ssam nt = &ic->ic_scan; 599138568Ssam ni = TAILQ_FIRST(&nt->nt_node); 600138568Ssam 601116742Ssam if (ic->ic_opmode == IEEE80211_M_HOSTAP) { 602138568Ssam u_int8_t maxrssi[IEEE80211_CHAN_MAX]; /* XXX off stack? */ 603138568Ssam int i, bestchan; 604138568Ssam u_int8_t rssi; 605138568Ssam 606116742Ssam /* 607116742Ssam * The passive scan to look for existing AP's completed, 608116742Ssam * select a channel to camp on. Identify the channels 609116742Ssam * that already have one or more AP's and try to locate 610138568Ssam * an unnoccupied one. If that fails, pick a channel that 611138568Ssam * looks to be quietest. 612116742Ssam */ 613138568Ssam memset(maxrssi, 0, sizeof(maxrssi)); 614116742Ssam for (; ni != NULL; ni = nextbs) { 615116742Ssam ieee80211_ref_node(ni); 616116742Ssam nextbs = TAILQ_NEXT(ni, ni_list); 617138568Ssam rssi = ic->ic_node_getrssi(ni); 618138568Ssam i = ieee80211_chan2ieee(ic, ni->ni_chan); 619138568Ssam if (rssi > maxrssi[i]) 620138568Ssam maxrssi[i] = rssi; 621138568Ssam ieee80211_unref_node(&ni); 622116742Ssam } 623138568Ssam /* XXX select channel more intelligently */ 624138568Ssam bestchan = -1; 625116742Ssam for (i = 0; i < IEEE80211_CHAN_MAX; i++) 626138568Ssam if (isset(ic->ic_chan_active, i)) { 627138568Ssam /* 628138568Ssam * If the channel is unoccupied the max rssi 629138568Ssam * should be zero; just take it. Otherwise 630138568Ssam * track the channel with the lowest rssi and 631138568Ssam * use that when all channels appear occupied. 632138568Ssam */ 633138568Ssam if (maxrssi[i] == 0) { 634138568Ssam bestchan = i; 635116742Ssam break; 636138568Ssam } 637138568Ssam if (maxrssi[i] < maxrssi[bestchan]) 638138568Ssam bestchan = i; 639138568Ssam } 640138568Ssam if (bestchan != -1) { 641138568Ssam ieee80211_create_ibss(ic, &ic->ic_channels[bestchan]); 642138568Ssam return; 643116742Ssam } 644138568Ssam /* no suitable channel, should not happen */ 645138568Ssam } 646138568Ssam 647138568Ssam /* 648138568Ssam * When manually sequencing the state machine; scan just once 649138568Ssam * regardless of whether we have a candidate or not. The 650138568Ssam * controlling application is expected to setup state and 651138568Ssam * initiate an association. 652138568Ssam */ 653138568Ssam if (ic->ic_roaming == IEEE80211_ROAMING_MANUAL) 654116742Ssam return; 655138568Ssam /* 656138568Ssam * Automatic sequencing; look for a candidate and 657138568Ssam * if found join the network. 658138568Ssam */ 659116742Ssam if (ni == NULL) { 660138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, 661138568Ssam "%s: no scan candidate\n", __func__); 662116742Ssam notfound: 663116742Ssam if (ic->ic_opmode == IEEE80211_M_IBSS && 664116742Ssam (ic->ic_flags & IEEE80211_F_IBSSON) && 665116742Ssam ic->ic_des_esslen != 0) { 666116742Ssam ieee80211_create_ibss(ic, ic->ic_ibss_chan); 667116742Ssam return; 668116742Ssam } 669116742Ssam /* 670116742Ssam * Reset the list of channels to scan and start again. 671116742Ssam */ 672138568Ssam ieee80211_reset_scan(ic); 673138568Ssam ic->ic_flags |= IEEE80211_F_SCAN; 674138568Ssam ieee80211_next_scan(ic); 675116742Ssam return; 676116742Ssam } 677116742Ssam selbs = NULL; 678138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, "\t%s\n", 679138568Ssam "macaddr bssid chan rssi rate flag wep essid"); 680116742Ssam for (; ni != NULL; ni = nextbs) { 681116742Ssam ieee80211_ref_node(ni); 682116742Ssam nextbs = TAILQ_NEXT(ni, ni_list); 683116742Ssam if (ni->ni_fails) { 684116742Ssam /* 685116742Ssam * The configuration of the access points may change 686116742Ssam * during my scan. So delete the entry for the AP 687116742Ssam * and retry to associate if there is another beacon. 688116742Ssam */ 689138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, 690138568Ssam "%s: skip scan candidate %s, fails %u\n", 691138568Ssam __func__, ether_sprintf(ni->ni_macaddr), 692138568Ssam ni->ni_fails); 693116742Ssam if (ni->ni_fails++ > 2) 694138568Ssam ieee80211_free_node(ni); 695116742Ssam continue; 696116742Ssam } 697138568Ssam if (ieee80211_match_bss(ic, ni) == 0) { 698116742Ssam if (selbs == NULL) 699116742Ssam selbs = ni; 700138568Ssam else if (ieee80211_node_compare(ic, ni, selbs) > 0) { 701116742Ssam ieee80211_unref_node(&selbs); 702116742Ssam selbs = ni; 703116742Ssam } else 704116742Ssam ieee80211_unref_node(&ni); 705116742Ssam } else { 706116742Ssam ieee80211_unref_node(&ni); 707116742Ssam } 708116742Ssam } 709116742Ssam if (selbs == NULL) 710116742Ssam goto notfound; 711138568Ssam if (!ieee80211_sta_join(ic, selbs)) { 712138568Ssam ieee80211_unref_node(&selbs); 713138568Ssam goto notfound; 714138568Ssam } 715138568Ssam} 716138568Ssam 717138568Ssam/* 718138568Ssam * Handle 802.11 ad hoc network merge. The 719138568Ssam * convention, set by the Wireless Ethernet Compatibility Alliance 720138568Ssam * (WECA), is that an 802.11 station will change its BSSID to match 721138568Ssam * the "oldest" 802.11 ad hoc network, on the same channel, that 722138568Ssam * has the station's desired SSID. The "oldest" 802.11 network 723138568Ssam * sends beacons with the greatest TSF timestamp. 724138568Ssam * 725138568Ssam * The caller is assumed to validate TSF's before attempting a merge. 726138568Ssam * 727138568Ssam * Return !0 if the BSSID changed, 0 otherwise. 728138568Ssam */ 729138568Ssamint 730138568Ssamieee80211_ibss_merge(struct ieee80211com *ic, struct ieee80211_node *ni) 731138568Ssam{ 732138568Ssam 733138568Ssam if (IEEE80211_ADDR_EQ(ni->ni_bssid, ic->ic_bss->ni_bssid)) { 734138568Ssam /* unchanged, nothing to do */ 735138568Ssam return 0; 736138568Ssam } 737138568Ssam if (ieee80211_match_bss(ic, ni) != 0) { /* capabilities mismatch */ 738138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 739138568Ssam "%s: merge failed, capabilities mismatch\n", __func__); 740138568Ssam ic->ic_stats.is_ibss_capmismatch++; 741138568Ssam return 0; 742138568Ssam } 743138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 744138568Ssam "%s: new bssid %s: %s preamble, %s slot time%s\n", __func__, 745138568Ssam ether_sprintf(ni->ni_bssid), 746138568Ssam ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long", 747138568Ssam ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long", 748138568Ssam ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : "" 749138568Ssam ); 750138568Ssam return ieee80211_sta_join(ic, ni); 751138568Ssam} 752138568Ssam 753138568Ssam/* 754138568Ssam * Join the specified IBSS/BSS network. The node is assumed to 755138568Ssam * be passed in with a held reference. 756138568Ssam */ 757138568Ssamint 758138568Ssamieee80211_sta_join(struct ieee80211com *ic, struct ieee80211_node *selbs) 759138568Ssam{ 760138568Ssam struct ieee80211_node *obss; 761138568Ssam 762116742Ssam if (ic->ic_opmode == IEEE80211_M_IBSS) { 763138568Ssam /* 764140440Ssam * Delete unusable rates; we've already checked 765140440Ssam * that the negotiated rate set is acceptable. 766138568Ssam */ 767140440Ssam ieee80211_fix_rate(ic, selbs, IEEE80211_F_DODEL); 768127772Ssam /* 769139521Ssam * Create the neighbor table; it will already 770139521Ssam * exist if we are simply switching mastership. 771127772Ssam */ 772139521Ssam if (ic->ic_sta == NULL) { 773139521Ssam ic->ic_sta = ieee80211_node_table_alloc(ic, 774138568Ssam "neighbor", ic->ic_inact_run, 775138568Ssam ieee80211_timeout_stations); 776139521Ssam if (ic->ic_sta == NULL) { 777139521Ssam /* 778139521Ssam * Should remain in SCAN state and retry. 779139521Ssam */ 780139521Ssam /* XXX stat+msg */ 781139521Ssam return 0; 782139521Ssam } 783138568Ssam } 784138568Ssam } 785138568Ssam 786138568Ssam /* 787138568Ssam * Committed to selbs, setup state. 788138568Ssam */ 789138568Ssam obss = ic->ic_bss; 790138568Ssam ic->ic_bss = selbs; 791138568Ssam if (obss != NULL) 792138568Ssam ieee80211_free_node(obss); 793138568Ssam /* 794138568Ssam * Set the erp state (mostly the slot time) to deal with 795138568Ssam * the auto-select case; this should be redundant if the 796138568Ssam * mode is locked. 797138568Ssam */ 798138568Ssam ic->ic_curmode = ieee80211_chan2mode(ic, selbs->ni_chan); 799138568Ssam ieee80211_reset_erp(ic); 800138568Ssam ieee80211_wme_initparams(ic); 801138568Ssam if (ic->ic_opmode == IEEE80211_M_IBSS) 802117811Ssam ieee80211_new_state(ic, IEEE80211_S_RUN, -1); 803138568Ssam else 804117811Ssam ieee80211_new_state(ic, IEEE80211_S_AUTH, -1); 805138568Ssam return 1; 806116742Ssam} 807116742Ssam 808138568Ssam/* 809138568Ssam * Leave the specified IBSS/BSS network. The node is assumed to 810138568Ssam * be passed in with a held reference. 811138568Ssam */ 812138568Ssamvoid 813138568Ssamieee80211_sta_leave(struct ieee80211com *ic, struct ieee80211_node *ni) 814138568Ssam{ 815138568Ssam ic->ic_node_cleanup(ni); 816138568Ssam ieee80211_notify_node_leave(ic, ni); 817138568Ssam} 818138568Ssam 819116742Ssamstatic struct ieee80211_node * 820138568Ssamnode_alloc(struct ieee80211_node_table *nt) 821116742Ssam{ 822127768Ssam struct ieee80211_node *ni; 823138568Ssam 824127768Ssam MALLOC(ni, struct ieee80211_node *, sizeof(struct ieee80211_node), 825127768Ssam M_80211_NODE, M_NOWAIT | M_ZERO); 826127768Ssam return ni; 827116742Ssam} 828116742Ssam 829138568Ssam/* 830138568Ssam * Reclaim any resources in a node and reset any critical 831138568Ssam * state. Typically nodes are free'd immediately after, 832138568Ssam * but in some cases the storage may be reused so we need 833138568Ssam * to insure consistent state (should probably fix that). 834138568Ssam */ 835116742Ssamstatic void 836138568Ssamnode_cleanup(struct ieee80211_node *ni) 837116742Ssam{ 838138568Ssam#define N(a) (sizeof(a)/sizeof(a[0])) 839138568Ssam struct ieee80211com *ic = ni->ni_ic; 840138568Ssam int i, qlen; 841138568Ssam 842138568Ssam /* NB: preserve ni_table */ 843138568Ssam if (ni->ni_flags & IEEE80211_NODE_PWR_MGT) { 844138568Ssam ic->ic_ps_sta--; 845138568Ssam ni->ni_flags &= ~IEEE80211_NODE_PWR_MGT; 846138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_POWER, 847138568Ssam "[%s] power save mode off, %u sta's in ps mode\n", 848138568Ssam ether_sprintf(ni->ni_macaddr), ic->ic_ps_sta); 849138568Ssam } 850138568Ssam 851138568Ssam /* 852138568Ssam * Drain power save queue and, if needed, clear TIM. 853138568Ssam */ 854138568Ssam IEEE80211_NODE_SAVEQ_DRAIN(ni, qlen); 855138568Ssam if (qlen != 0 && ic->ic_set_tim != NULL) 856138568Ssam ic->ic_set_tim(ic, ni, 0); 857138568Ssam 858138568Ssam ni->ni_associd = 0; 859138568Ssam if (ni->ni_challenge != NULL) { 860138568Ssam FREE(ni->ni_challenge, M_DEVBUF); 861138568Ssam ni->ni_challenge = NULL; 862138568Ssam } 863138568Ssam /* 864138568Ssam * Preserve SSID, WPA, and WME ie's so the bss node is 865138568Ssam * reusable during a re-auth/re-assoc state transition. 866138568Ssam * If we remove these data they will not be recreated 867138568Ssam * because they come from a probe-response or beacon frame 868138568Ssam * which cannot be expected prior to the association-response. 869138568Ssam * This should not be an issue when operating in other modes 870138568Ssam * as stations leaving always go through a full state transition 871138568Ssam * which will rebuild this state. 872138568Ssam * 873138568Ssam * XXX does this leave us open to inheriting old state? 874138568Ssam */ 875138568Ssam for (i = 0; i < N(ni->ni_rxfrag); i++) 876138568Ssam if (ni->ni_rxfrag[i] != NULL) { 877138568Ssam m_freem(ni->ni_rxfrag[i]); 878138568Ssam ni->ni_rxfrag[i] = NULL; 879138568Ssam } 880138568Ssam ieee80211_crypto_delkey(ic, &ni->ni_ucastkey); 881138568Ssam#undef N 882116742Ssam} 883116742Ssam 884116742Ssamstatic void 885138568Ssamnode_free(struct ieee80211_node *ni) 886116742Ssam{ 887138568Ssam struct ieee80211com *ic = ni->ni_ic; 888138568Ssam 889138568Ssam ic->ic_node_cleanup(ni); 890138568Ssam if (ni->ni_wpa_ie != NULL) 891138568Ssam FREE(ni->ni_wpa_ie, M_DEVBUF); 892138568Ssam if (ni->ni_wme_ie != NULL) 893138568Ssam FREE(ni->ni_wme_ie, M_DEVBUF); 894138568Ssam IEEE80211_NODE_SAVEQ_DESTROY(ni); 895138568Ssam FREE(ni, M_80211_NODE); 896116742Ssam} 897116742Ssam 898120104Ssamstatic u_int8_t 899138568Ssamnode_getrssi(const struct ieee80211_node *ni) 900120104Ssam{ 901120104Ssam return ni->ni_rssi; 902120104Ssam} 903120104Ssam 904116742Ssamstatic void 905138568Ssamieee80211_setup_node(struct ieee80211_node_table *nt, 906138568Ssam struct ieee80211_node *ni, const u_int8_t *macaddr) 907116742Ssam{ 908138568Ssam struct ieee80211com *ic = nt->nt_ic; 909116742Ssam int hash; 910116742Ssam 911138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 912138568Ssam "%s %s in %s table\n", __func__, 913138568Ssam ether_sprintf(macaddr), nt->nt_name); 914138568Ssam 915116742Ssam IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 916116742Ssam hash = IEEE80211_NODE_HASH(macaddr); 917138568Ssam ieee80211_node_initref(ni); /* mark referenced */ 918138568Ssam ni->ni_chan = IEEE80211_CHAN_ANYC; 919138568Ssam ni->ni_authmode = IEEE80211_AUTH_OPEN; 920138568Ssam ni->ni_txpower = ic->ic_txpowlimit; /* max power */ 921138568Ssam ieee80211_crypto_resetkey(ic, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE); 922139528Ssam ni->ni_inact_reload = nt->nt_inact_init; 923139528Ssam ni->ni_inact = ni->ni_inact_reload; 924138568Ssam IEEE80211_NODE_SAVEQ_INIT(ni, "unknown"); 925138568Ssam 926138568Ssam IEEE80211_NODE_LOCK(nt); 927138568Ssam TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list); 928138568Ssam LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash); 929138568Ssam ni->ni_table = nt; 930138568Ssam ni->ni_ic = ic; 931138568Ssam IEEE80211_NODE_UNLOCK(nt); 932116742Ssam} 933116742Ssam 934116742Ssamstruct ieee80211_node * 935138568Ssamieee80211_alloc_node(struct ieee80211_node_table *nt, const u_int8_t *macaddr) 936116742Ssam{ 937138568Ssam struct ieee80211com *ic = nt->nt_ic; 938138568Ssam struct ieee80211_node *ni; 939138568Ssam 940138568Ssam ni = ic->ic_node_alloc(nt); 941116742Ssam if (ni != NULL) 942138568Ssam ieee80211_setup_node(nt, ni, macaddr); 943127769Ssam else 944127769Ssam ic->ic_stats.is_rx_nodealloc++; 945116742Ssam return ni; 946116742Ssam} 947116742Ssam 948116742Ssamstruct ieee80211_node * 949138568Ssamieee80211_dup_bss(struct ieee80211_node_table *nt, const u_int8_t *macaddr) 950116742Ssam{ 951138568Ssam struct ieee80211com *ic = nt->nt_ic; 952138568Ssam struct ieee80211_node *ni; 953138568Ssam 954138568Ssam ni = ic->ic_node_alloc(nt); 955116742Ssam if (ni != NULL) { 956138568Ssam ieee80211_setup_node(nt, ni, macaddr); 957127770Ssam /* 958127770Ssam * Inherit from ic_bss. 959127770Ssam */ 960138568Ssam ni->ni_authmode = ic->ic_bss->ni_authmode; 961138568Ssam ni->ni_txpower = ic->ic_bss->ni_txpower; 962138568Ssam ni->ni_vlan = ic->ic_bss->ni_vlan; /* XXX?? */ 963127770Ssam IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_bss->ni_bssid); 964138568Ssam ieee80211_set_chan(ic, ni, ic->ic_bss->ni_chan); 965138568Ssam ni->ni_rsn = ic->ic_bss->ni_rsn; 966127770Ssam } else 967127770Ssam ic->ic_stats.is_rx_nodealloc++; 968116742Ssam return ni; 969116742Ssam} 970116742Ssam 971127772Ssamstatic struct ieee80211_node * 972138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 973138568Ssam_ieee80211_find_node_debug(struct ieee80211_node_table *nt, 974138568Ssam const u_int8_t *macaddr, const char *func, int line) 975138568Ssam#else 976138568Ssam_ieee80211_find_node(struct ieee80211_node_table *nt, 977138568Ssam const u_int8_t *macaddr) 978138568Ssam#endif 979116742Ssam{ 980116742Ssam struct ieee80211_node *ni; 981116742Ssam int hash; 982116742Ssam 983138568Ssam IEEE80211_NODE_LOCK_ASSERT(nt); 984127772Ssam 985116742Ssam hash = IEEE80211_NODE_HASH(macaddr); 986138568Ssam LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 987116742Ssam if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 988138568Ssam ieee80211_ref_node(ni); /* mark referenced */ 989138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 990138568Ssam IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE, 991138568Ssam "%s (%s:%u) %s refcnt %d\n", __func__, func, line, 992138568Ssam ether_sprintf(ni->ni_macaddr), 993138568Ssam ieee80211_node_refcnt(ni)); 994138568Ssam#endif 995127772Ssam return ni; 996116742Ssam } 997116742Ssam } 998127772Ssam return NULL; 999127772Ssam} 1000138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1001138568Ssam#define _ieee80211_find_node(nt, mac) \ 1002138568Ssam _ieee80211_find_node_debug(nt, mac, func, line) 1003138568Ssam#endif 1004127772Ssam 1005127772Ssamstruct ieee80211_node * 1006138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1007138568Ssamieee80211_find_node_debug(struct ieee80211_node_table *nt, 1008138568Ssam const u_int8_t *macaddr, const char *func, int line) 1009138568Ssam#else 1010138568Ssamieee80211_find_node(struct ieee80211_node_table *nt, const u_int8_t *macaddr) 1011138568Ssam#endif 1012127772Ssam{ 1013127772Ssam struct ieee80211_node *ni; 1014127772Ssam 1015138568Ssam IEEE80211_NODE_LOCK(nt); 1016138568Ssam ni = _ieee80211_find_node(nt, macaddr); 1017138568Ssam IEEE80211_NODE_UNLOCK(nt); 1018116742Ssam return ni; 1019116742Ssam} 1020116742Ssam 1021116742Ssam/* 1022138568Ssam * Fake up a node; this handles node discovery in adhoc mode. 1023138568Ssam * Note that for the driver's benefit we we treat this like 1024138568Ssam * an association so the driver has an opportunity to setup 1025138568Ssam * it's private state. 1026138568Ssam */ 1027138568Ssamstruct ieee80211_node * 1028138568Ssamieee80211_fakeup_adhoc_node(struct ieee80211_node_table *nt, 1029138568Ssam const u_int8_t macaddr[IEEE80211_ADDR_LEN]) 1030138568Ssam{ 1031138568Ssam struct ieee80211com *ic = nt->nt_ic; 1032138568Ssam struct ieee80211_node *ni; 1033138568Ssam 1034138568Ssam ni = ieee80211_dup_bss(nt, macaddr); 1035138568Ssam if (ni != NULL) { 1036138568Ssam /* XXX no rate negotiation; just dup */ 1037138568Ssam ni->ni_rates = ic->ic_bss->ni_rates; 1038139524Ssam if (ic->ic_newassoc != NULL) 1039138568Ssam ic->ic_newassoc(ic, ni, 1); 1040138568Ssam /* XXX not right for 802.1x/WPA */ 1041138568Ssam ieee80211_node_authorize(ic, ni); 1042138568Ssam ieee80211_ref_node(ni); /* hold reference */ 1043138568Ssam } 1044138568Ssam return ni; 1045138568Ssam} 1046138568Ssam 1047138568Ssam/* 1048138568Ssam * Locate the node for sender, track state, and then pass the 1049138568Ssam * (referenced) node up to the 802.11 layer for its use. We 1050138568Ssam * are required to pass some node so we fall back to ic_bss 1051138568Ssam * when this frame is from an unknown sender. The 802.11 layer 1052138568Ssam * knows this means the sender wasn't in the node table and 1053138568Ssam * acts accordingly. 1054138568Ssam */ 1055138568Ssamstruct ieee80211_node * 1056138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1057138568Ssamieee80211_find_rxnode_debug(struct ieee80211com *ic, 1058138568Ssam const struct ieee80211_frame_min *wh, const char *func, int line) 1059138568Ssam#else 1060138568Ssamieee80211_find_rxnode(struct ieee80211com *ic, 1061138568Ssam const struct ieee80211_frame_min *wh) 1062138568Ssam#endif 1063138568Ssam{ 1064138568Ssam#define IS_CTL(wh) \ 1065138568Ssam ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) == IEEE80211_FC0_TYPE_CTL) 1066138568Ssam#define IS_PSPOLL(wh) \ 1067138568Ssam ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == IEEE80211_FC0_SUBTYPE_PS_POLL) 1068138568Ssam struct ieee80211_node_table *nt; 1069138568Ssam struct ieee80211_node *ni; 1070138568Ssam 1071138568Ssam /* XXX may want scanned nodes in the neighbor table for adhoc */ 1072138568Ssam if (ic->ic_opmode == IEEE80211_M_STA || 1073138568Ssam ic->ic_opmode == IEEE80211_M_MONITOR || 1074138568Ssam (ic->ic_flags & IEEE80211_F_SCAN)) 1075138568Ssam nt = &ic->ic_scan; 1076138568Ssam else 1077138568Ssam nt = ic->ic_sta; 1078138568Ssam /* XXX check ic_bss first in station mode */ 1079138568Ssam /* XXX 4-address frames? */ 1080138568Ssam IEEE80211_NODE_LOCK(nt); 1081138568Ssam if (IS_CTL(wh) && !IS_PSPOLL(wh) /*&& !IS_RTS(ah)*/) 1082138568Ssam ni = _ieee80211_find_node(nt, wh->i_addr1); 1083138568Ssam else 1084138568Ssam ni = _ieee80211_find_node(nt, wh->i_addr2); 1085138568Ssam IEEE80211_NODE_UNLOCK(nt); 1086138568Ssam 1087138568Ssam return (ni != NULL ? ni : ieee80211_ref_node(ic->ic_bss)); 1088138568Ssam#undef IS_PSPOLL 1089138568Ssam#undef IS_CTL 1090138568Ssam} 1091138568Ssam 1092138568Ssam/* 1093127772Ssam * Return a reference to the appropriate node for sending 1094127772Ssam * a data frame. This handles node discovery in adhoc networks. 1095127772Ssam */ 1096127772Ssamstruct ieee80211_node * 1097138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1098138568Ssamieee80211_find_txnode_debug(struct ieee80211com *ic, const u_int8_t *macaddr, 1099138568Ssam const char *func, int line) 1100138568Ssam#else 1101138568Ssamieee80211_find_txnode(struct ieee80211com *ic, const u_int8_t *macaddr) 1102138568Ssam#endif 1103127772Ssam{ 1104138568Ssam struct ieee80211_node_table *nt = ic->ic_sta; 1105127772Ssam struct ieee80211_node *ni; 1106127772Ssam 1107127772Ssam /* 1108127772Ssam * The destination address should be in the node table 1109127772Ssam * unless we are operating in station mode or this is a 1110127772Ssam * multicast/broadcast frame. 1111127772Ssam */ 1112138568Ssam if (nt == NULL || IEEE80211_IS_MULTICAST(macaddr)) 1113138568Ssam return ieee80211_ref_node(ic->ic_bss); 1114127772Ssam 1115127772Ssam /* XXX can't hold lock across dup_bss 'cuz of recursive locking */ 1116138568Ssam IEEE80211_NODE_LOCK(nt); 1117138568Ssam ni = _ieee80211_find_node(nt, macaddr); 1118138568Ssam IEEE80211_NODE_UNLOCK(nt); 1119138568Ssam 1120138568Ssam if (ni == NULL) { 1121138568Ssam if (ic->ic_opmode == IEEE80211_M_IBSS || 1122138568Ssam ic->ic_opmode == IEEE80211_M_AHDEMO) 1123138568Ssam ni = ieee80211_fakeup_adhoc_node(nt, macaddr); 1124138568Ssam 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 1158138568Ssam "%s (%s:%u) %s refcnt %d\n", __func__, func, line, 1159138568Ssam#else 1160138568Ssam "%s %s refcnt %d\n", __func__, 1161138568Ssam#endif 1162138568Ssam ether_sprintf(ni->ni_macaddr), 1163138568Ssam ieee80211_node_refcnt(ni)); 1164116742Ssam break; 1165116742Ssam } 1166116742Ssam } 1167138568Ssam IEEE80211_NODE_UNLOCK(nt); 1168116742Ssam return ni; 1169116742Ssam} 1170116742Ssam 1171138568Ssam/* 1172138568Ssam * Like find but search based on the ssid too. 1173138568Ssam */ 1174138568Ssamstruct ieee80211_node * 1175138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1176138568Ssamieee80211_find_node_with_ssid_debug(struct ieee80211_node_table *nt, 1177138568Ssam const u_int8_t *macaddr, u_int ssidlen, const u_int8_t *ssid, 1178138568Ssam const char *func, int line) 1179138568Ssam#else 1180138568Ssamieee80211_find_node_with_ssid(struct ieee80211_node_table *nt, 1181138568Ssam const u_int8_t *macaddr, u_int ssidlen, const u_int8_t *ssid) 1182138568Ssam#endif 1183138568Ssam{ 1184138568Ssam struct ieee80211com *ic = nt->nt_ic; 1185138568Ssam struct ieee80211_node *ni; 1186138568Ssam int hash; 1187138568Ssam 1188138568Ssam hash = IEEE80211_NODE_HASH(macaddr); 1189138568Ssam IEEE80211_NODE_LOCK(nt); 1190138568Ssam LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1191138568Ssam if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr) && 1192138568Ssam ni->ni_esslen == ic->ic_des_esslen && 1193138568Ssam memcmp(ni->ni_essid, ic->ic_des_essid, ni->ni_esslen) == 0) { 1194138568Ssam ieee80211_ref_node(ni); /* mark referenced */ 1195138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1196138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1197138568Ssam "%s (%s:%u) %s refcnt %d\n", __func__, func, line, 1198138568Ssam#else 1199138568Ssam "%s %s refcnt %d\n", __func__, 1200138568Ssam#endif 1201138568Ssam ether_sprintf(ni->ni_macaddr), 1202138568Ssam ieee80211_node_refcnt(ni)); 1203138568Ssam break; 1204138568Ssam } 1205138568Ssam } 1206138568Ssam IEEE80211_NODE_UNLOCK(nt); 1207138568Ssam return ni; 1208138568Ssam} 1209138568Ssam 1210138568Ssam 1211116742Ssamstatic void 1212138568Ssam_ieee80211_free_node(struct ieee80211_node *ni) 1213116742Ssam{ 1214138568Ssam struct ieee80211com *ic = ni->ni_ic; 1215138568Ssam struct ieee80211_node_table *nt = ni->ni_table; 1216119150Ssam 1217138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1218138568Ssam "%s %s in %s table\n", __func__, ether_sprintf(ni->ni_macaddr), 1219138568Ssam nt != NULL ? nt->nt_name : "<gone>"); 1220138568Ssam 1221138568Ssam IEEE80211_AID_CLR(ni->ni_associd, ic->ic_aid_bitmap); 1222138568Ssam if (nt != NULL) { 1223138568Ssam TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1224138568Ssam LIST_REMOVE(ni, ni_hash); 1225138568Ssam } 1226138568Ssam ic->ic_node_free(ni); 1227116742Ssam} 1228116742Ssam 1229116742Ssamvoid 1230138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1231138568Ssamieee80211_free_node_debug(struct ieee80211_node *ni, const char *func, int line) 1232138568Ssam#else 1233138568Ssamieee80211_free_node(struct ieee80211_node *ni) 1234138568Ssam#endif 1235116742Ssam{ 1236138568Ssam struct ieee80211_node_table *nt = ni->ni_table; 1237119150Ssam 1238138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1239138568Ssam IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE, 1240138568Ssam "%s (%s:%u) %s refcnt %d\n", __func__, func, line, 1241138568Ssam ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1); 1242138568Ssam#endif 1243138568Ssam if (ieee80211_node_dectestref(ni)) { 1244138568Ssam /* 1245138568Ssam * Beware; if the node is marked gone then it's already 1246138568Ssam * been removed from the table and we cannot assume the 1247138568Ssam * table still exists. Regardless, there's no need to lock 1248138568Ssam * the table. 1249138568Ssam */ 1250138568Ssam if (ni->ni_table != NULL) { 1251138568Ssam IEEE80211_NODE_LOCK(nt); 1252138568Ssam _ieee80211_free_node(ni); 1253138568Ssam IEEE80211_NODE_UNLOCK(nt); 1254138568Ssam } else 1255138568Ssam _ieee80211_free_node(ni); 1256116742Ssam } 1257116742Ssam} 1258116742Ssam 1259138568Ssam/* 1260138568Ssam * Reclaim a node. If this is the last reference count then 1261138568Ssam * do the normal free work. Otherwise remove it from the node 1262138568Ssam * table and mark it gone by clearing the back-reference. 1263138568Ssam */ 1264138568Ssamstatic void 1265138568Ssamnode_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 1266116742Ssam{ 1267138568Ssam 1268138568Ssam if (!ieee80211_node_dectestref(ni)) { 1269138568Ssam /* 1270138568Ssam * Other references are present, just remove the 1271138568Ssam * node from the table so it cannot be found. When 1272138568Ssam * the references are dropped storage will be 1273138568Ssam * reclaimed. This normally only happens for ic_bss. 1274138568Ssam */ 1275138568Ssam TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1276138568Ssam LIST_REMOVE(ni, ni_hash); 1277138568Ssam ni->ni_table = NULL; /* clear reference */ 1278138568Ssam } else 1279138568Ssam _ieee80211_free_node(ni); 1280138568Ssam} 1281138568Ssam 1282138568Ssamstatic void 1283138568Ssamieee80211_free_allnodes_locked(struct ieee80211_node_table *nt) 1284138568Ssam{ 1285138568Ssam struct ieee80211com *ic = nt->nt_ic; 1286116742Ssam struct ieee80211_node *ni; 1287116742Ssam 1288138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1289138568Ssam "%s: free all nodes in %s table\n", __func__, nt->nt_name); 1290138568Ssam 1291138568Ssam while ((ni = TAILQ_FIRST(&nt->nt_node)) != NULL) { 1292138568Ssam if (ni->ni_associd != 0) { 1293138568Ssam if (ic->ic_auth->ia_node_leave != NULL) 1294138568Ssam ic->ic_auth->ia_node_leave(ic, ni); 1295138568Ssam IEEE80211_AID_CLR(ni->ni_associd, ic->ic_aid_bitmap); 1296138568Ssam } 1297138568Ssam node_reclaim(nt, ni); 1298138568Ssam } 1299138568Ssam ieee80211_reset_erp(ic); 1300116742Ssam} 1301116742Ssam 1302138568Ssamstatic void 1303138568Ssamieee80211_free_allnodes(struct ieee80211_node_table *nt) 1304138568Ssam{ 1305138568Ssam 1306138568Ssam IEEE80211_NODE_LOCK(nt); 1307138568Ssam ieee80211_free_allnodes_locked(nt); 1308138568Ssam IEEE80211_NODE_UNLOCK(nt); 1309138568Ssam} 1310138568Ssam 1311120483Ssam/* 1312138568Ssam * Timeout entries in the scan cache. 1313138568Ssam */ 1314138568Ssamstatic void 1315138568Ssamieee80211_timeout_scan_candidates(struct ieee80211_node_table *nt) 1316138568Ssam{ 1317138568Ssam struct ieee80211com *ic = nt->nt_ic; 1318138568Ssam struct ieee80211_node *ni, *tni; 1319138568Ssam 1320138568Ssam IEEE80211_NODE_LOCK(nt); 1321138568Ssam ni = ic->ic_bss; 1322138568Ssam /* XXX belongs elsewhere */ 1323138568Ssam if (ni->ni_rxfrag[0] != NULL && ticks > ni->ni_rxfragstamp + hz) { 1324138568Ssam m_freem(ni->ni_rxfrag[0]); 1325138568Ssam ni->ni_rxfrag[0] = NULL; 1326138568Ssam } 1327138568Ssam TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, tni) { 1328138568Ssam if (ni->ni_inact && --ni->ni_inact == 0) { 1329138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1330138568Ssam "[%s] scan candidate purged from cache " 1331138568Ssam "(refcnt %u)\n", ether_sprintf(ni->ni_macaddr), 1332138568Ssam ieee80211_node_refcnt(ni)-1); 1333138568Ssam node_reclaim(nt, ni); 1334138568Ssam } 1335138568Ssam } 1336138568Ssam IEEE80211_NODE_UNLOCK(nt); 1337138568Ssam 1338138568Ssam nt->nt_inact_timer = IEEE80211_INACT_WAIT; 1339138568Ssam} 1340138568Ssam 1341138568Ssam/* 1342138568Ssam * Timeout inactive stations and do related housekeeping. 1343138568Ssam * Note that we cannot hold the node lock while sending a 1344138568Ssam * frame as this would lead to a LOR. Instead we use a 1345138568Ssam * generation number to mark nodes that we've scanned and 1346138568Ssam * drop the lock and restart a scan if we have to time out 1347138568Ssam * a node. Since we are single-threaded by virtue of 1348120483Ssam * controlling the inactivity timer we can be sure this will 1349120483Ssam * process each node only once. 1350120483Ssam */ 1351138568Ssamstatic void 1352138568Ssamieee80211_timeout_stations(struct ieee80211_node_table *nt) 1353116742Ssam{ 1354138568Ssam struct ieee80211com *ic = nt->nt_ic; 1355120483Ssam struct ieee80211_node *ni; 1356138568Ssam u_int gen; 1357116742Ssam 1358138568Ssam IEEE80211_SCAN_LOCK(nt); 1359138568Ssam gen = nt->nt_scangen++; 1360138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1361138568Ssam "%s: sta scangen %u\n", __func__, gen); 1362120483Ssamrestart: 1363138568Ssam IEEE80211_NODE_LOCK(nt); 1364138568Ssam TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 1365120483Ssam if (ni->ni_scangen == gen) /* previously handled */ 1366120483Ssam continue; 1367120483Ssam ni->ni_scangen = gen; 1368138568Ssam /* 1369138568Ssam * Free fragment if not needed anymore 1370138568Ssam * (last fragment older than 1s). 1371138568Ssam * XXX doesn't belong here 1372138568Ssam */ 1373138568Ssam if (ni->ni_rxfrag[0] != NULL && 1374138568Ssam ticks > ni->ni_rxfragstamp + hz) { 1375138568Ssam m_freem(ni->ni_rxfrag[0]); 1376138568Ssam ni->ni_rxfrag[0] = NULL; 1377138568Ssam } 1378138568Ssam ni->ni_inact--; 1379138568Ssam if (ni->ni_associd != 0) { 1380119150Ssam /* 1381138568Ssam * Age frames on the power save queue. The 1382138568Ssam * aging interval is 4 times the listen 1383138568Ssam * interval specified by the station. This 1384138568Ssam * number is factored into the age calculations 1385138568Ssam * when the frame is placed on the queue. We 1386138568Ssam * store ages as time differences we can check 1387138568Ssam * and/or adjust only the head of the list. 1388138568Ssam */ 1389138568Ssam if (IEEE80211_NODE_SAVEQ_QLEN(ni) != 0) { 1390138568Ssam struct mbuf *m; 1391138568Ssam int discard = 0; 1392138568Ssam 1393138568Ssam IEEE80211_NODE_SAVEQ_LOCK(ni); 1394138568Ssam while (IF_POLL(&ni->ni_savedq, m) != NULL && 1395138568Ssam M_AGE_GET(m) < IEEE80211_INACT_WAIT) { 1396138568SsamIEEE80211_DPRINTF(ic, IEEE80211_MSG_POWER, "[%s] discard frame, age %u\n", ether_sprintf(ni->ni_macaddr), M_AGE_GET(m));/*XXX*/ 1397138568Ssam _IEEE80211_NODE_SAVEQ_DEQUEUE_HEAD(ni, m); 1398138568Ssam m_freem(m); 1399138568Ssam discard++; 1400138568Ssam } 1401138568Ssam if (m != NULL) 1402138568Ssam M_AGE_SUB(m, IEEE80211_INACT_WAIT); 1403138568Ssam IEEE80211_NODE_SAVEQ_UNLOCK(ni); 1404138568Ssam 1405138568Ssam if (discard != 0) { 1406138568Ssam IEEE80211_DPRINTF(ic, 1407138568Ssam IEEE80211_MSG_POWER, 1408138568Ssam "[%s] discard %u frames for age\n", 1409138568Ssam ether_sprintf(ni->ni_macaddr), 1410138568Ssam discard); 1411138568Ssam IEEE80211_NODE_STAT_ADD(ni, 1412138568Ssam ps_discard, discard); 1413138568Ssam if (IEEE80211_NODE_SAVEQ_QLEN(ni) == 0) 1414138568Ssam ic->ic_set_tim(ic, ni, 0); 1415138568Ssam } 1416138568Ssam } 1417138568Ssam /* 1418138568Ssam * Probe the station before time it out. We 1419138568Ssam * send a null data frame which may not be 1420138568Ssam * universally supported by drivers (need it 1421138568Ssam * for ps-poll support so it should be...). 1422138568Ssam */ 1423139528Ssam if (0 < ni->ni_inact && 1424139528Ssam ni->ni_inact <= ic->ic_inact_probe) { 1425138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1426138568Ssam "[%s] probe station due to inactivity\n", 1427138568Ssam ether_sprintf(ni->ni_macaddr)); 1428138568Ssam IEEE80211_NODE_UNLOCK(nt); 1429138568Ssam ieee80211_send_nulldata(ic, ni); 1430138568Ssam /* XXX stat? */ 1431138568Ssam goto restart; 1432138568Ssam } 1433138568Ssam } 1434138568Ssam if (ni->ni_inact <= 0) { 1435138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1436138568Ssam "[%s] station timed out due to inactivity " 1437138568Ssam "(refcnt %u)\n", ether_sprintf(ni->ni_macaddr), 1438138568Ssam ieee80211_node_refcnt(ni)); 1439138568Ssam /* 1440138568Ssam * Send a deauthenticate frame and drop the station. 1441138568Ssam * This is somewhat complicated due to reference counts 1442138568Ssam * and locking. At this point a station will typically 1443138568Ssam * have a reference count of 1. ieee80211_node_leave 1444138568Ssam * will do a "free" of the node which will drop the 1445138568Ssam * reference count. But in the meantime a reference 1446138568Ssam * wil be held by the deauth frame. The actual reclaim 1447138568Ssam * of the node will happen either after the tx is 1448138568Ssam * completed or by ieee80211_node_leave. 1449120483Ssam * 1450138568Ssam * Separately we must drop the node lock before sending 1451138568Ssam * in case the driver takes a lock, as this will result 1452138568Ssam * in LOR between the node lock and the driver lock. 1453119150Ssam */ 1454138568Ssam IEEE80211_NODE_UNLOCK(nt); 1455138568Ssam if (ni->ni_associd != 0) { 1456138568Ssam IEEE80211_SEND_MGMT(ic, ni, 1457138568Ssam IEEE80211_FC0_SUBTYPE_DEAUTH, 1458138568Ssam IEEE80211_REASON_AUTH_EXPIRE); 1459138568Ssam } 1460138568Ssam ieee80211_node_leave(ic, ni); 1461121180Ssam ic->ic_stats.is_node_timeout++; 1462120483Ssam goto restart; 1463120483Ssam } 1464116742Ssam } 1465138568Ssam IEEE80211_NODE_UNLOCK(nt); 1466138568Ssam 1467138568Ssam IEEE80211_SCAN_UNLOCK(nt); 1468138568Ssam 1469138568Ssam nt->nt_inact_timer = IEEE80211_INACT_WAIT; 1470116742Ssam} 1471116742Ssam 1472116742Ssamvoid 1473138568Ssamieee80211_iterate_nodes(struct ieee80211_node_table *nt, ieee80211_iter_func *f, void *arg) 1474116742Ssam{ 1475116742Ssam struct ieee80211_node *ni; 1476138568Ssam u_int gen; 1477116742Ssam 1478138568Ssam IEEE80211_SCAN_LOCK(nt); 1479138568Ssam gen = nt->nt_scangen++; 1480138568Ssam 1481138568Ssam IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE, 1482138568Ssam "%s: sta scangen %u\n", __func__, gen); 1483138568Ssamrestart: 1484138568Ssam IEEE80211_NODE_LOCK(nt); 1485138568Ssam TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 1486138568Ssam if (ni->ni_scangen != gen) { 1487138568Ssam ni->ni_scangen = gen; 1488138568Ssam (void) ieee80211_ref_node(ni); 1489138568Ssam IEEE80211_NODE_UNLOCK(nt); 1490138568Ssam (*f)(arg, ni); 1491138568Ssam ieee80211_free_node(ni); 1492138568Ssam goto restart; 1493138568Ssam } 1494138568Ssam } 1495138568Ssam IEEE80211_NODE_UNLOCK(nt); 1496138568Ssam 1497138568Ssam IEEE80211_SCAN_UNLOCK(nt); 1498116742Ssam} 1499138568Ssam 1500138568Ssamvoid 1501138568Ssamieee80211_dump_node(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 1502138568Ssam{ 1503138568Ssam printf("0x%p: mac %s refcnt %d\n", ni, 1504138568Ssam ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)); 1505138568Ssam printf("\tscangen %u authmode %u flags 0x%x\n", 1506138568Ssam ni->ni_scangen, ni->ni_authmode, ni->ni_flags); 1507138568Ssam printf("\tassocid 0x%x txpower %u vlan %u\n", 1508138568Ssam ni->ni_associd, ni->ni_txpower, ni->ni_vlan); 1509138568Ssam printf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n", 1510138568Ssam ni->ni_txseqs[0], 1511138568Ssam ni->ni_rxseqs[0] >> IEEE80211_SEQ_SEQ_SHIFT, 1512138568Ssam ni->ni_rxseqs[0] & IEEE80211_SEQ_FRAG_MASK, 1513138568Ssam ni->ni_rxfragstamp); 1514138568Ssam printf("\trstamp %u rssi %u intval %u capinfo 0x%x\n", 1515138568Ssam ni->ni_rstamp, ni->ni_rssi, ni->ni_intval, ni->ni_capinfo); 1516138568Ssam printf("\tbssid %s essid \"%.*s\" channel %u:0x%x\n", 1517138568Ssam ether_sprintf(ni->ni_bssid), 1518138568Ssam ni->ni_esslen, ni->ni_essid, 1519138568Ssam ni->ni_chan->ic_freq, ni->ni_chan->ic_flags); 1520138568Ssam printf("\tfails %u inact %u txrate %u\n", 1521138568Ssam ni->ni_fails, ni->ni_inact, ni->ni_txrate); 1522138568Ssam} 1523138568Ssam 1524138568Ssamvoid 1525138568Ssamieee80211_dump_nodes(struct ieee80211_node_table *nt) 1526138568Ssam{ 1527138568Ssam ieee80211_iterate_nodes(nt, 1528138568Ssam (ieee80211_iter_func *) ieee80211_dump_node, nt); 1529138568Ssam} 1530138568Ssam 1531138568Ssam/* 1532138568Ssam * Handle a station joining an 11g network. 1533138568Ssam */ 1534138568Ssamstatic void 1535138568Ssamieee80211_node_join_11g(struct ieee80211com *ic, struct ieee80211_node *ni) 1536138568Ssam{ 1537138568Ssam 1538138568Ssam /* 1539138568Ssam * Station isn't capable of short slot time. Bump 1540138568Ssam * the count of long slot time stations and disable 1541138568Ssam * use of short slot time. Note that the actual switch 1542138568Ssam * over to long slot time use may not occur until the 1543138568Ssam * next beacon transmission (per sec. 7.3.1.4 of 11g). 1544138568Ssam */ 1545138568Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 1546138568Ssam ic->ic_longslotsta++; 1547138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1548138568Ssam "[%s] station needs long slot time, count %d\n", 1549138568Ssam ether_sprintf(ni->ni_macaddr), ic->ic_longslotsta); 1550138568Ssam /* XXX vap's w/ conflicting needs won't work */ 1551138568Ssam ieee80211_set_shortslottime(ic, 0); 1552138568Ssam } 1553138568Ssam /* 1554138568Ssam * If the new station is not an ERP station 1555138568Ssam * then bump the counter and enable protection 1556138568Ssam * if configured. 1557138568Ssam */ 1558138568Ssam if (!ieee80211_iserp_rateset(ic, &ni->ni_rates)) { 1559138568Ssam ic->ic_nonerpsta++; 1560138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1561138568Ssam "[%s] station is !ERP, %d non-ERP stations associated\n", 1562138568Ssam ether_sprintf(ni->ni_macaddr), ic->ic_nonerpsta); 1563138568Ssam /* 1564138568Ssam * If protection is configured, enable it. 1565138568Ssam */ 1566138568Ssam if (ic->ic_protmode != IEEE80211_PROT_NONE) { 1567138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1568138568Ssam "%s: enable use of protection\n", __func__); 1569138568Ssam ic->ic_flags |= IEEE80211_F_USEPROT; 1570138568Ssam } 1571138568Ssam /* 1572138568Ssam * If station does not support short preamble 1573138568Ssam * then we must enable use of Barker preamble. 1574138568Ssam */ 1575138568Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) { 1576138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1577138568Ssam "[%s] station needs long preamble\n", 1578138568Ssam ether_sprintf(ni->ni_macaddr)); 1579138568Ssam ic->ic_flags |= IEEE80211_F_USEBARKER; 1580138568Ssam ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; 1581138568Ssam } 1582138568Ssam } else 1583138568Ssam ni->ni_flags |= IEEE80211_NODE_ERP; 1584138568Ssam} 1585138568Ssam 1586138568Ssamvoid 1587138568Ssamieee80211_node_join(struct ieee80211com *ic, struct ieee80211_node *ni, int resp) 1588138568Ssam{ 1589138568Ssam int newassoc; 1590138568Ssam 1591138568Ssam if (ni->ni_associd == 0) { 1592138568Ssam u_int16_t aid; 1593138568Ssam 1594138568Ssam /* 1595138568Ssam * It would be good to search the bitmap 1596138568Ssam * more efficiently, but this will do for now. 1597138568Ssam */ 1598138568Ssam for (aid = 1; aid < ic->ic_max_aid; aid++) { 1599138568Ssam if (!IEEE80211_AID_ISSET(aid, 1600138568Ssam ic->ic_aid_bitmap)) 1601138568Ssam break; 1602138568Ssam } 1603138568Ssam if (aid >= ic->ic_max_aid) { 1604138568Ssam IEEE80211_SEND_MGMT(ic, ni, resp, 1605138568Ssam IEEE80211_REASON_ASSOC_TOOMANY); 1606138568Ssam ieee80211_node_leave(ic, ni); 1607138568Ssam return; 1608138568Ssam } 1609138568Ssam ni->ni_associd = aid | 0xc000; 1610138568Ssam IEEE80211_AID_SET(ni->ni_associd, ic->ic_aid_bitmap); 1611138568Ssam ic->ic_sta_assoc++; 1612138568Ssam newassoc = 1; 1613139522Ssam if (ic->ic_curmode == IEEE80211_MODE_11G || 1614139522Ssam ic->ic_curmode == IEEE80211_MODE_TURBO_G) 1615138568Ssam ieee80211_node_join_11g(ic, ni); 1616138568Ssam } else 1617138568Ssam newassoc = 0; 1618138568Ssam 1619138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, 1620139523Ssam "[%s] station %sassociated at aid %d: %s preamble, %s slot time%s%s\n", 1621139523Ssam ether_sprintf(ni->ni_macaddr), newassoc ? "" : "re", 1622139523Ssam IEEE80211_NODE_AID(ni), 1623139523Ssam ic->ic_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long", 1624139523Ssam ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long", 1625139523Ssam ic->ic_flags & IEEE80211_F_USEPROT ? ", protection" : "", 1626139523Ssam ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "" 1627139523Ssam ); 1628138568Ssam 1629138568Ssam /* give driver a chance to setup state like ni_txrate */ 1630139524Ssam if (ic->ic_newassoc != NULL) 1631138568Ssam ic->ic_newassoc(ic, ni, newassoc); 1632139528Ssam ni->ni_inact_reload = ic->ic_inact_auth; 1633139528Ssam ni->ni_inact = ni->ni_inact_reload; 1634138568Ssam IEEE80211_SEND_MGMT(ic, ni, resp, IEEE80211_STATUS_SUCCESS); 1635138568Ssam /* tell the authenticator about new station */ 1636138568Ssam if (ic->ic_auth->ia_node_join != NULL) 1637138568Ssam ic->ic_auth->ia_node_join(ic, ni); 1638138568Ssam ieee80211_notify_node_join(ic, ni, newassoc); 1639138568Ssam} 1640138568Ssam 1641138568Ssam/* 1642138568Ssam * Handle a station leaving an 11g network. 1643138568Ssam */ 1644138568Ssamstatic void 1645138568Ssamieee80211_node_leave_11g(struct ieee80211com *ic, struct ieee80211_node *ni) 1646138568Ssam{ 1647138568Ssam 1648139522Ssam KASSERT(ic->ic_curmode == IEEE80211_MODE_11G || 1649139522Ssam ic->ic_curmode == IEEE80211_MODE_TURBO_G, 1650138568Ssam ("not in 11g, curmode %x", ic->ic_curmode)); 1651138568Ssam 1652138568Ssam /* 1653138568Ssam * If a long slot station do the slot time bookkeeping. 1654138568Ssam */ 1655138568Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 1656138568Ssam KASSERT(ic->ic_longslotsta > 0, 1657138568Ssam ("bogus long slot station count %d", ic->ic_longslotsta)); 1658138568Ssam ic->ic_longslotsta--; 1659138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1660138568Ssam "[%s] long slot time station leaves, count now %d\n", 1661138568Ssam ether_sprintf(ni->ni_macaddr), ic->ic_longslotsta); 1662138568Ssam if (ic->ic_longslotsta == 0) { 1663138568Ssam /* 1664138568Ssam * Re-enable use of short slot time if supported 1665138568Ssam * and not operating in IBSS mode (per spec). 1666138568Ssam */ 1667138568Ssam if ((ic->ic_caps & IEEE80211_C_SHSLOT) && 1668138568Ssam ic->ic_opmode != IEEE80211_M_IBSS) { 1669138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1670138568Ssam "%s: re-enable use of short slot time\n", 1671138568Ssam __func__); 1672138568Ssam ieee80211_set_shortslottime(ic, 1); 1673138568Ssam } 1674138568Ssam } 1675138568Ssam } 1676138568Ssam /* 1677138568Ssam * If a non-ERP station do the protection-related bookkeeping. 1678138568Ssam */ 1679138568Ssam if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) { 1680138568Ssam KASSERT(ic->ic_nonerpsta > 0, 1681138568Ssam ("bogus non-ERP station count %d", ic->ic_nonerpsta)); 1682138568Ssam ic->ic_nonerpsta--; 1683138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1684138568Ssam "[%s] non-ERP station leaves, count now %d\n", 1685138568Ssam ether_sprintf(ni->ni_macaddr), ic->ic_nonerpsta); 1686138568Ssam if (ic->ic_nonerpsta == 0) { 1687138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1688138568Ssam "%s: disable use of protection\n", __func__); 1689138568Ssam ic->ic_flags &= ~IEEE80211_F_USEPROT; 1690138568Ssam /* XXX verify mode? */ 1691138568Ssam if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) { 1692138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1693138568Ssam "%s: re-enable use of short preamble\n", 1694138568Ssam __func__); 1695138568Ssam ic->ic_flags |= IEEE80211_F_SHPREAMBLE; 1696138568Ssam ic->ic_flags &= ~IEEE80211_F_USEBARKER; 1697138568Ssam } 1698138568Ssam } 1699138568Ssam } 1700138568Ssam} 1701138568Ssam 1702138568Ssam/* 1703138568Ssam * Handle bookkeeping for station deauthentication/disassociation 1704138568Ssam * when operating as an ap. 1705138568Ssam */ 1706138568Ssamvoid 1707138568Ssamieee80211_node_leave(struct ieee80211com *ic, struct ieee80211_node *ni) 1708138568Ssam{ 1709138568Ssam 1710138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, 1711138568Ssam "[%s] station with aid %d leaves\n", 1712138568Ssam ether_sprintf(ni->ni_macaddr), IEEE80211_NODE_AID(ni)); 1713138568Ssam 1714138568Ssam KASSERT(ic->ic_opmode == IEEE80211_M_HOSTAP || 1715138568Ssam ic->ic_opmode == IEEE80211_M_IBSS || 1716138568Ssam ic->ic_opmode == IEEE80211_M_AHDEMO, 1717138568Ssam ("unexpected operating mode %u", ic->ic_opmode)); 1718138568Ssam /* 1719138568Ssam * If node wasn't previously associated all 1720138568Ssam * we need to do is reclaim the reference. 1721138568Ssam */ 1722138568Ssam /* XXX ibss mode bypasses 11g and notification */ 1723138568Ssam if (ni->ni_associd == 0) 1724138568Ssam goto done; 1725138568Ssam /* 1726138568Ssam * Tell the authenticator the station is leaving. 1727138568Ssam * Note that we must do this before yanking the 1728138568Ssam * association id as the authenticator uses the 1729138568Ssam * associd to locate it's state block. 1730138568Ssam */ 1731138568Ssam if (ic->ic_auth->ia_node_leave != NULL) 1732138568Ssam ic->ic_auth->ia_node_leave(ic, ni); 1733138568Ssam IEEE80211_AID_CLR(ni->ni_associd, ic->ic_aid_bitmap); 1734138568Ssam ni->ni_associd = 0; 1735138568Ssam ic->ic_sta_assoc--; 1736138568Ssam 1737139522Ssam if (ic->ic_curmode == IEEE80211_MODE_11G || 1738139522Ssam ic->ic_curmode == IEEE80211_MODE_TURBO_G) 1739138568Ssam ieee80211_node_leave_11g(ic, ni); 1740138568Ssam /* 1741138568Ssam * Cleanup station state. In particular clear various 1742138568Ssam * state that might otherwise be reused if the node 1743138568Ssam * is reused before the reference count goes to zero 1744138568Ssam * (and memory is reclaimed). 1745138568Ssam */ 1746138568Ssam ieee80211_sta_leave(ic, ni); 1747138568Ssamdone: 1748138568Ssam ni->ni_inact_reload = ic->ic_inact_init; /* just in case */ 1749138568Ssam ieee80211_free_node(ni); 1750138568Ssam} 1751138568Ssam 1752138568Ssamu_int8_t 1753138568Ssamieee80211_getrssi(struct ieee80211com *ic) 1754138568Ssam{ 1755138568Ssam#define NZ(x) ((x) == 0 ? 1 : (x)) 1756138568Ssam struct ieee80211_node_table *nt = ic->ic_sta; 1757138568Ssam u_int32_t rssi_samples, rssi_total; 1758138568Ssam struct ieee80211_node *ni; 1759138568Ssam 1760138568Ssam rssi_total = 0; 1761138568Ssam rssi_samples = 0; 1762138568Ssam switch (ic->ic_opmode) { 1763138568Ssam case IEEE80211_M_IBSS: /* average of all ibss neighbors */ 1764138568Ssam nt = ic->ic_sta; 1765138568Ssam if (nt == NULL) 1766138568Ssam break; 1767138568Ssam /* XXX locking */ 1768138568Ssam TAILQ_FOREACH(ni, &ic->ic_sta->nt_node, ni_list) 1769138568Ssam if (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) { 1770138568Ssam rssi_samples++; 1771138568Ssam rssi_total += ic->ic_node_getrssi(ni); 1772138568Ssam } 1773138568Ssam break; 1774138568Ssam case IEEE80211_M_AHDEMO: /* average of all neighbors */ 1775138568Ssam nt = ic->ic_sta; 1776138568Ssam if (nt == NULL) 1777138568Ssam break; 1778138568Ssam /* XXX locking */ 1779138568Ssam TAILQ_FOREACH(ni, &ic->ic_sta->nt_node, ni_list) { 1780138568Ssam rssi_samples++; 1781138568Ssam rssi_total += ic->ic_node_getrssi(ni); 1782138568Ssam } 1783138568Ssam break; 1784138568Ssam case IEEE80211_M_HOSTAP: /* average of all associated stations */ 1785138568Ssam nt = ic->ic_sta; 1786138568Ssam if (nt == NULL) 1787138568Ssam break; 1788138568Ssam /* XXX locking */ 1789138568Ssam TAILQ_FOREACH(ni, &ic->ic_sta->nt_node, ni_list) 1790138568Ssam if (IEEE80211_AID(ni->ni_associd) != 0) { 1791138568Ssam rssi_samples++; 1792138568Ssam rssi_total += ic->ic_node_getrssi(ni); 1793138568Ssam } 1794138568Ssam break; 1795138568Ssam case IEEE80211_M_MONITOR: /* XXX */ 1796138568Ssam case IEEE80211_M_STA: /* use stats from associated ap */ 1797138568Ssam default: 1798138568Ssam if (ic->ic_bss != NULL) 1799138568Ssam rssi_total = ic->ic_node_getrssi(ic->ic_bss); 1800138568Ssam rssi_samples = 1; 1801138568Ssam break; 1802138568Ssam } 1803138568Ssam return rssi_total / NZ(rssi_samples); 1804138568Ssam#undef NZ 1805138568Ssam} 1806138568Ssam 1807138568Ssam/* 1808138568Ssam * Indicate whether there are frames queued for a station in power-save mode. 1809138568Ssam */ 1810138568Ssamstatic void 1811138568Ssamieee80211_set_tim(struct ieee80211com *ic, struct ieee80211_node *ni, int set) 1812138568Ssam{ 1813138568Ssam u_int16_t aid; 1814138568Ssam 1815138568Ssam KASSERT(ic->ic_opmode == IEEE80211_M_HOSTAP || 1816138568Ssam ic->ic_opmode == IEEE80211_M_IBSS, 1817138568Ssam ("operating mode %u", ic->ic_opmode)); 1818138568Ssam 1819138568Ssam aid = IEEE80211_AID(ni->ni_associd); 1820138568Ssam KASSERT(aid < ic->ic_max_aid, 1821138568Ssam ("bogus aid %u, max %u", aid, ic->ic_max_aid)); 1822138568Ssam 1823138568Ssam IEEE80211_BEACON_LOCK(ic); 1824138568Ssam if (set != (isset(ic->ic_tim_bitmap, aid) != 0)) { 1825138568Ssam if (set) { 1826138568Ssam setbit(ic->ic_tim_bitmap, aid); 1827138568Ssam ic->ic_ps_pending++; 1828138568Ssam } else { 1829138568Ssam clrbit(ic->ic_tim_bitmap, aid); 1830138568Ssam ic->ic_ps_pending--; 1831138568Ssam } 1832138568Ssam ic->ic_flags |= IEEE80211_F_TIMUPDATE; 1833138568Ssam } 1834138568Ssam IEEE80211_BEACON_UNLOCK(ic); 1835138568Ssam} 1836138568Ssam 1837138568Ssam/* 1838138568Ssam * Node table support. 1839138568Ssam */ 1840138568Ssam 1841138568Ssamstatic void 1842138568Ssamieee80211_node_table_init(struct ieee80211com *ic, 1843138568Ssam struct ieee80211_node_table *nt, 1844138568Ssam const char *name, int inact, 1845138568Ssam void (*timeout)(struct ieee80211_node_table *)) 1846138568Ssam{ 1847138568Ssam 1848138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1849138568Ssam "%s %s table, inact %u\n", __func__, name, inact); 1850138568Ssam 1851138568Ssam nt->nt_ic = ic; 1852138568Ssam /* XXX need unit */ 1853138568Ssam IEEE80211_NODE_LOCK_INIT(nt, ic->ic_ifp->if_xname); 1854138568Ssam IEEE80211_SCAN_LOCK_INIT(nt, ic->ic_ifp->if_xname); 1855138568Ssam TAILQ_INIT(&nt->nt_node); 1856138568Ssam nt->nt_name = name; 1857138568Ssam nt->nt_scangen = 1; 1858138568Ssam nt->nt_inact_init = inact; 1859138568Ssam nt->nt_timeout = timeout; 1860138568Ssam} 1861138568Ssam 1862138568Ssamstatic struct ieee80211_node_table * 1863138568Ssamieee80211_node_table_alloc(struct ieee80211com *ic, 1864138568Ssam const char *name, int inact, 1865138568Ssam void (*timeout)(struct ieee80211_node_table *)) 1866138568Ssam{ 1867138568Ssam struct ieee80211_node_table *nt; 1868138568Ssam 1869138568Ssam MALLOC(nt, struct ieee80211_node_table *, 1870138568Ssam sizeof(struct ieee80211_node_table), 1871138568Ssam M_DEVBUF, M_NOWAIT | M_ZERO); 1872138568Ssam if (nt == NULL) { 1873138568Ssam printf("%s: no memory node table!\n", __func__); 1874138568Ssam return NULL; 1875138568Ssam } 1876138568Ssam ieee80211_node_table_init(ic, nt, name, inact, timeout); 1877138568Ssam return nt; 1878138568Ssam} 1879138568Ssam 1880138568Ssamvoid 1881138568Ssamieee80211_node_table_reset(struct ieee80211_node_table *nt) 1882138568Ssam{ 1883138568Ssam 1884138568Ssam IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE, 1885138568Ssam "%s %s table\n", __func__, nt->nt_name); 1886138568Ssam 1887138568Ssam IEEE80211_NODE_LOCK(nt); 1888138568Ssam nt->nt_inact_timer = 0; 1889138568Ssam ieee80211_free_allnodes_locked(nt); 1890138568Ssam IEEE80211_NODE_UNLOCK(nt); 1891138568Ssam} 1892138568Ssam 1893138568Ssamstatic void 1894138568Ssamieee80211_node_table_cleanup(struct ieee80211_node_table *nt) 1895138568Ssam{ 1896138568Ssam 1897138568Ssam IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE, 1898138568Ssam "%s %s table\n", __func__, nt->nt_name); 1899138568Ssam 1900138568Ssam ieee80211_free_allnodes_locked(nt); 1901138568Ssam IEEE80211_SCAN_LOCK_DESTROY(nt); 1902138568Ssam IEEE80211_NODE_LOCK_DESTROY(nt); 1903138568Ssam} 1904138568Ssam 1905138568Ssam/* 1906138568Ssam * NB: public for use in ieee80211_proto.c 1907138568Ssam */ 1908138568Ssamvoid 1909138568Ssamieee80211_node_table_free(struct ieee80211_node_table *nt) 1910138568Ssam{ 1911138568Ssam 1912138568Ssam IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE, 1913138568Ssam "%s %s table\n", __func__, nt->nt_name); 1914138568Ssam 1915138568Ssam IEEE80211_NODE_LOCK(nt); 1916138568Ssam nt->nt_inact_timer = 0; 1917138568Ssam ieee80211_node_table_cleanup(nt); 1918138568Ssam FREE(nt, M_DEVBUF); 1919138568Ssam} 1920