ieee80211_node.c revision 139520
1116742Ssam/*- 2116904Ssam * Copyright (c) 2001 Atsushi Onoe 3138568Ssam * Copyright (c) 2002-2004 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 139520 2004-12-31 21:19:59Z 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; 201138568Ssam} 202138568Ssam 203138568Ssamvoid 204138568Ssamieee80211_node_unauthorize(struct ieee80211com *ic, struct ieee80211_node *ni) 205138568Ssam{ 206138568Ssam ni->ni_flags &= ~IEEE80211_NODE_AUTH; 207138568Ssam} 208138568Ssam 209116742Ssam/* 210138568Ssam * Set/change the channel. The rate set is also updated as 211138568Ssam * to insure a consistent view by drivers. 212138568Ssam */ 213138568Ssamstatic __inline void 214138568Ssamieee80211_set_chan(struct ieee80211com *ic, 215138568Ssam struct ieee80211_node *ni, struct ieee80211_channel *chan) 216138568Ssam{ 217138568Ssam ni->ni_chan = chan; 218138568Ssam ni->ni_rates = ic->ic_sup_rates[ieee80211_chan2mode(ic, chan)]; 219138568Ssam} 220138568Ssam 221138568Ssam/* 222116742Ssam * AP scanning support. 223116742Ssam */ 224116742Ssam 225138568Ssam#ifdef IEEE80211_DEBUG 226138568Ssamstatic void 227138568Ssamdump_chanlist(const u_char chans[]) 228138568Ssam{ 229138568Ssam const char *sep; 230138568Ssam int i; 231138568Ssam 232138568Ssam sep = " "; 233138568Ssam for (i = 0; i < IEEE80211_CHAN_MAX; i++) 234138568Ssam if (isset(chans, i)) { 235138568Ssam printf("%s%u", sep, i); 236138568Ssam sep = ", "; 237138568Ssam } 238138568Ssam} 239138568Ssam#endif /* IEEE80211_DEBUG */ 240138568Ssam 241116742Ssam/* 242138568Ssam * Initialize the channel set to scan based on the 243116742Ssam * of available channels and the current PHY mode. 244116742Ssam */ 245117811Ssamstatic void 246138568Ssamieee80211_reset_scan(struct ieee80211com *ic) 247116742Ssam{ 248116742Ssam 249138568Ssam /* XXX ic_des_chan should be handled with ic_chan_active */ 250138568Ssam if (ic->ic_des_chan != IEEE80211_CHAN_ANYC) { 251138568Ssam memset(ic->ic_chan_scan, 0, sizeof(ic->ic_chan_scan)); 252138568Ssam setbit(ic->ic_chan_scan, 253138568Ssam ieee80211_chan2ieee(ic, ic->ic_des_chan)); 254138568Ssam } else 255138568Ssam memcpy(ic->ic_chan_scan, ic->ic_chan_active, 256138568Ssam sizeof(ic->ic_chan_active)); 257117811Ssam /* NB: hack, setup so next_scan starts with the first channel */ 258117811Ssam if (ic->ic_bss->ni_chan == IEEE80211_CHAN_ANYC) 259138568Ssam ieee80211_set_chan(ic, ic->ic_bss, 260138568Ssam &ic->ic_channels[IEEE80211_CHAN_MAX]); 261138568Ssam#ifdef IEEE80211_DEBUG 262138568Ssam if (ieee80211_msg_scan(ic)) { 263138568Ssam printf("%s: scan set:", __func__); 264138568Ssam dump_chanlist(ic->ic_chan_scan); 265138568Ssam printf(" start chan %u\n", 266138568Ssam ieee80211_chan2ieee(ic, ic->ic_bss->ni_chan)); 267138568Ssam } 268138568Ssam#endif /* IEEE80211_DEBUG */ 269116742Ssam} 270116742Ssam 271116742Ssam/* 272116742Ssam * Begin an active scan. 273116742Ssam */ 274116742Ssamvoid 275138568Ssamieee80211_begin_scan(struct ieee80211com *ic, int reset) 276116742Ssam{ 277116742Ssam 278138568Ssam ic->ic_scan.nt_scangen++; 279117811Ssam /* 280117811Ssam * In all but hostap mode scanning starts off in 281117811Ssam * an active mode before switching to passive. 282117811Ssam */ 283121180Ssam if (ic->ic_opmode != IEEE80211_M_HOSTAP) { 284117811Ssam ic->ic_flags |= IEEE80211_F_ASCAN; 285121180Ssam ic->ic_stats.is_scan_active++; 286121180Ssam } else 287121180Ssam ic->ic_stats.is_scan_passive++; 288139520Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, 289139520Ssam "begin %s scan in %s mode, scangen %u\n", 290138568Ssam (ic->ic_flags & IEEE80211_F_ASCAN) ? "active" : "passive", 291139520Ssam ieee80211_phymode_name[ic->ic_curmode], ic->ic_scan.nt_scangen); 292116742Ssam /* 293138568Ssam * Clear scan state and flush any previously seen AP's. 294116742Ssam */ 295138568Ssam ieee80211_reset_scan(ic); 296138568Ssam if (reset) 297138568Ssam ieee80211_free_allnodes(&ic->ic_scan); 298116742Ssam 299138568Ssam ic->ic_flags |= IEEE80211_F_SCAN; 300138568Ssam 301117811Ssam /* Scan the next channel. */ 302138568Ssam ieee80211_next_scan(ic); 303116742Ssam} 304116742Ssam 305116742Ssam/* 306116742Ssam * Switch to the next channel marked for scanning. 307116742Ssam */ 308138568Ssamint 309138568Ssamieee80211_next_scan(struct ieee80211com *ic) 310116742Ssam{ 311116742Ssam struct ieee80211_channel *chan; 312116742Ssam 313138568Ssam /* 314138568Ssam * Insure any previous mgt frame timeouts don't fire. 315138568Ssam * This assumes the driver does the right thing in 316138568Ssam * flushing anything queued in the driver and below. 317138568Ssam */ 318138568Ssam ic->ic_mgt_timer = 0; 319138568Ssam 320116742Ssam chan = ic->ic_bss->ni_chan; 321138568Ssam do { 322116742Ssam if (++chan > &ic->ic_channels[IEEE80211_CHAN_MAX]) 323116742Ssam chan = &ic->ic_channels[0]; 324116742Ssam if (isset(ic->ic_chan_scan, ieee80211_chan2ieee(ic, chan))) { 325138568Ssam clrbit(ic->ic_chan_scan, ieee80211_chan2ieee(ic, chan)); 326138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, 327138568Ssam "%s: chan %d->%d\n", __func__, 328138568Ssam ieee80211_chan2ieee(ic, ic->ic_bss->ni_chan), 329138568Ssam ieee80211_chan2ieee(ic, chan)); 330138568Ssam ieee80211_set_chan(ic, ic->ic_bss, chan); 331138568Ssam#ifdef notyet 332138568Ssam /* XXX driver state change */ 333116742Ssam /* 334138568Ssam * Scan next channel. If doing an active scan 335138568Ssam * and the channel is not marked passive-only 336138568Ssam * then send a probe request. Otherwise just 337138568Ssam * listen for beacons on the channel. 338116742Ssam */ 339138568Ssam if ((ic->ic_flags & IEEE80211_F_ASCAN) && 340138568Ssam (ni->ni_chan->ic_flags & IEEE80211_CHAN_PASSIVE) == 0) { 341138568Ssam IEEE80211_SEND_MGMT(ic, ni, 342138568Ssam IEEE80211_FC0_SUBTYPE_PROBE_REQ, 0); 343138568Ssam } 344138568Ssam#else 345138568Ssam ieee80211_new_state(ic, IEEE80211_S_SCAN, -1); 346138568Ssam#endif 347138568Ssam return 1; 348116742Ssam } 349138568Ssam } while (chan != ic->ic_bss->ni_chan); 350138568Ssam ieee80211_end_scan(ic); 351138568Ssam return 0; 352116742Ssam} 353116742Ssam 354116742Ssamvoid 355116742Ssamieee80211_create_ibss(struct ieee80211com* ic, struct ieee80211_channel *chan) 356116742Ssam{ 357116742Ssam struct ieee80211_node *ni; 358116742Ssam 359138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, 360138568Ssam "%s: creating ibss\n", __func__); 361138568Ssam 362138568Ssam /* 363138568Ssam * Create the station/neighbor table. Note that for adhoc 364138568Ssam * mode we make the initial inactivity timer longer since 365138568Ssam * we create nodes only through discovery and they typically 366138568Ssam * are long-lived associations. 367138568Ssam */ 368138568Ssam if (ic->ic_opmode == IEEE80211_M_HOSTAP) 369138568Ssam ic->ic_sta = ieee80211_node_table_alloc(ic, 370138568Ssam "station", ic->ic_inact_init, 371138568Ssam ieee80211_timeout_stations); 372138568Ssam else 373138568Ssam ic->ic_sta = ieee80211_node_table_alloc(ic, 374138568Ssam "neighbor", ic->ic_inact_run, 375138568Ssam ieee80211_timeout_stations); 376138568Ssam if (ic->ic_sta == NULL) { 377138568Ssam /* 378138568Ssam * Should remain in SCAN state and retry. 379138568Ssam */ 380138568Ssam /* XXX stat+msg */ 381138568Ssam return; 382138568Ssam } 383138568Ssam 384116742Ssam ni = ic->ic_bss; 385116742Ssam IEEE80211_ADDR_COPY(ni->ni_macaddr, ic->ic_myaddr); 386116742Ssam IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_myaddr); 387116742Ssam ni->ni_esslen = ic->ic_des_esslen; 388116742Ssam memcpy(ni->ni_essid, ic->ic_des_essid, ni->ni_esslen); 389116742Ssam ni->ni_rssi = 0; 390116742Ssam ni->ni_rstamp = 0; 391138568Ssam ni->ni_tstamp.tsf = 0; 392116742Ssam ni->ni_intval = ic->ic_lintval; 393138568Ssam ni->ni_capinfo = 0; 394138568Ssam ni->ni_erp = 0; 395138568Ssam if (ic->ic_flags & IEEE80211_F_PRIVACY) 396116742Ssam ni->ni_capinfo |= IEEE80211_CAPINFO_PRIVACY; 397116742Ssam if (ic->ic_phytype == IEEE80211_T_FH) { 398116742Ssam ni->ni_fhdwell = 200; /* XXX */ 399116742Ssam ni->ni_fhindex = 1; 400116742Ssam } 401138568Ssam if (ic->ic_opmode == IEEE80211_M_IBSS) { 402138568Ssam ic->ic_flags |= IEEE80211_F_SIBSS; 403138568Ssam ni->ni_capinfo |= IEEE80211_CAPINFO_IBSS; /* XXX */ 404138568Ssam ni->ni_bssid[0] |= 0x02; /* local bit for IBSS */ 405138568Ssam } 406138568Ssam /* 407138568Ssam * Fix the channel and related attributes. 408138568Ssam */ 409138568Ssam ieee80211_set_chan(ic, ni, chan); 410138568Ssam ic->ic_curmode = ieee80211_chan2mode(ic, chan); 411138568Ssam /* 412138568Ssam * Do mode-specific rate setup. 413138568Ssam */ 414138568Ssam if (ic->ic_curmode == IEEE80211_MODE_11G) { 415138568Ssam /* 416138568Ssam * Use a mixed 11b/11g rate set. 417138568Ssam */ 418138568Ssam ieee80211_set11gbasicrates(&ni->ni_rates, IEEE80211_MODE_11G); 419138568Ssam } else if (ic->ic_curmode == IEEE80211_MODE_11B) { 420138568Ssam /* 421138568Ssam * Force pure 11b rate set. 422138568Ssam */ 423138568Ssam ieee80211_set11gbasicrates(&ni->ni_rates, IEEE80211_MODE_11B); 424138568Ssam } 425138568Ssam /* 426138568Ssam * Set the erp state (mostly the slot time) to deal with 427138568Ssam * the auto-select case; this should be redundant if the 428138568Ssam * mode is locked. 429138568Ssam */ 430138568Ssam ieee80211_reset_erp(ic); 431138568Ssam ieee80211_wme_initparams(ic); 432138568Ssam 433117811Ssam ieee80211_new_state(ic, IEEE80211_S_RUN, -1); 434116742Ssam} 435116742Ssam 436138568Ssamvoid 437138568Ssamieee80211_reset_bss(struct ieee80211com *ic) 438138568Ssam{ 439138568Ssam struct ieee80211_node *ni, *obss; 440138568Ssam 441138568Ssam ieee80211_node_table_reset(&ic->ic_scan); 442138568Ssam ni = ieee80211_alloc_node(&ic->ic_scan, ic->ic_myaddr); 443138568Ssam KASSERT(ni != NULL, ("unable to setup inital BSS node")); 444138568Ssam obss = ic->ic_bss; 445138568Ssam ic->ic_bss = ieee80211_ref_node(ni); 446138568Ssam if (obss != NULL) 447138568Ssam ieee80211_free_node(obss); 448138568Ssam if (ic->ic_sta != NULL) { 449138568Ssam ieee80211_node_table_free(ic->ic_sta); 450138568Ssam ic->ic_sta = NULL; 451138568Ssam } 452138568Ssam} 453138568Ssam 454127767Ssamstatic int 455138568Ssamieee80211_match_bss(struct ieee80211com *ic, struct ieee80211_node *ni) 456127767Ssam{ 457127767Ssam u_int8_t rate; 458127767Ssam int fail; 459127767Ssam 460127767Ssam fail = 0; 461127767Ssam if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 462127767Ssam fail |= 0x01; 463127767Ssam if (ic->ic_des_chan != IEEE80211_CHAN_ANYC && 464127767Ssam ni->ni_chan != ic->ic_des_chan) 465127767Ssam fail |= 0x01; 466127767Ssam if (ic->ic_opmode == IEEE80211_M_IBSS) { 467127767Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 468127767Ssam fail |= 0x02; 469127767Ssam } else { 470127767Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 471127767Ssam fail |= 0x02; 472127767Ssam } 473138568Ssam if (ic->ic_flags & IEEE80211_F_PRIVACY) { 474127767Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 475127767Ssam fail |= 0x04; 476127767Ssam } else { 477127767Ssam /* XXX does this mean privacy is supported or required? */ 478127767Ssam if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 479127767Ssam fail |= 0x04; 480127767Ssam } 481127767Ssam rate = ieee80211_fix_rate(ic, ni, IEEE80211_F_DONEGO); 482127767Ssam if (rate & IEEE80211_RATE_BASIC) 483127767Ssam fail |= 0x08; 484127767Ssam if (ic->ic_des_esslen != 0 && 485127767Ssam (ni->ni_esslen != ic->ic_des_esslen || 486127767Ssam memcmp(ni->ni_essid, ic->ic_des_essid, ic->ic_des_esslen) != 0)) 487127767Ssam fail |= 0x10; 488127767Ssam if ((ic->ic_flags & IEEE80211_F_DESBSSID) && 489127767Ssam !IEEE80211_ADDR_EQ(ic->ic_des_bssid, ni->ni_bssid)) 490127767Ssam fail |= 0x20; 491127767Ssam#ifdef IEEE80211_DEBUG 492138568Ssam if (ieee80211_msg_scan(ic)) { 493127767Ssam printf(" %c %s", fail ? '-' : '+', 494127767Ssam ether_sprintf(ni->ni_macaddr)); 495127767Ssam printf(" %s%c", ether_sprintf(ni->ni_bssid), 496127767Ssam fail & 0x20 ? '!' : ' '); 497127767Ssam printf(" %3d%c", ieee80211_chan2ieee(ic, ni->ni_chan), 498127767Ssam fail & 0x01 ? '!' : ' '); 499127767Ssam printf(" %+4d", ni->ni_rssi); 500127767Ssam printf(" %2dM%c", (rate & IEEE80211_RATE_VAL) / 2, 501127767Ssam fail & 0x08 ? '!' : ' '); 502127767Ssam printf(" %4s%c", 503127767Ssam (ni->ni_capinfo & IEEE80211_CAPINFO_ESS) ? "ess" : 504127767Ssam (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) ? "ibss" : 505127767Ssam "????", 506127767Ssam fail & 0x02 ? '!' : ' '); 507127767Ssam printf(" %3s%c ", 508127767Ssam (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) ? 509127767Ssam "wep" : "no", 510127767Ssam fail & 0x04 ? '!' : ' '); 511127767Ssam ieee80211_print_essid(ni->ni_essid, ni->ni_esslen); 512127767Ssam printf("%s\n", fail & 0x10 ? "!" : ""); 513127767Ssam } 514127767Ssam#endif 515127767Ssam return fail; 516127767Ssam} 517127767Ssam 518138568Ssamstatic __inline u_int8_t 519138568Ssammaxrate(const struct ieee80211_node *ni) 520138568Ssam{ 521138568Ssam const struct ieee80211_rateset *rs = &ni->ni_rates; 522138568Ssam /* NB: assumes rate set is sorted (happens on frame receive) */ 523138568Ssam return rs->rs_rates[rs->rs_nrates-1] & IEEE80211_RATE_VAL; 524138568Ssam} 525138568Ssam 526116742Ssam/* 527138568Ssam * Compare the capabilities of two nodes and decide which is 528138568Ssam * more desirable (return >0 if a is considered better). Note 529138568Ssam * that we assume compatibility/usability has already been checked 530138568Ssam * so we don't need to (e.g. validate whether privacy is supported). 531138568Ssam * Used to select the best scan candidate for association in a BSS. 532138568Ssam */ 533138568Ssamstatic int 534138568Ssamieee80211_node_compare(struct ieee80211com *ic, 535138568Ssam const struct ieee80211_node *a, 536138568Ssam const struct ieee80211_node *b) 537138568Ssam{ 538138568Ssam u_int8_t maxa, maxb; 539138568Ssam u_int8_t rssia, rssib; 540138568Ssam 541138568Ssam /* privacy support preferred */ 542138568Ssam if ((a->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) && 543138568Ssam (b->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 544138568Ssam return 1; 545138568Ssam if ((a->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0 && 546138568Ssam (b->ni_capinfo & IEEE80211_CAPINFO_PRIVACY)) 547138568Ssam return -1; 548138568Ssam 549138568Ssam /* best/max rate preferred if signal level close enough XXX */ 550138568Ssam maxa = maxrate(a); 551138568Ssam maxb = maxrate(b); 552138568Ssam rssia = ic->ic_node_getrssi(a); 553138568Ssam rssib = ic->ic_node_getrssi(b); 554138568Ssam if (maxa != maxb && abs(rssib - rssia) < 5) 555138568Ssam return maxa - maxb; 556138568Ssam 557138568Ssam /* XXX use freq for channel preference */ 558138568Ssam /* for now just prefer 5Ghz band to all other bands */ 559138568Ssam if (IEEE80211_IS_CHAN_5GHZ(a->ni_chan) && 560138568Ssam !IEEE80211_IS_CHAN_5GHZ(b->ni_chan)) 561138568Ssam return 1; 562138568Ssam if (!IEEE80211_IS_CHAN_5GHZ(a->ni_chan) && 563138568Ssam IEEE80211_IS_CHAN_5GHZ(b->ni_chan)) 564138568Ssam return -1; 565138568Ssam 566138568Ssam /* all things being equal, use signal level */ 567138568Ssam return rssia - rssib; 568138568Ssam} 569138568Ssam 570138568Ssam/* 571116742Ssam * Complete a scan of potential channels. 572116742Ssam */ 573116742Ssamvoid 574138568Ssamieee80211_end_scan(struct ieee80211com *ic) 575116742Ssam{ 576116742Ssam struct ieee80211_node *ni, *nextbs, *selbs; 577138568Ssam struct ieee80211_node_table *nt; 578116742Ssam 579138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, "end %s scan\n", 580138568Ssam (ic->ic_flags & IEEE80211_F_ASCAN) ? "active" : "passive"); 581116742Ssam 582138568Ssam ic->ic_flags &= ~(IEEE80211_F_SCAN | IEEE80211_F_ASCAN); 583138568Ssam nt = &ic->ic_scan; 584138568Ssam ni = TAILQ_FIRST(&nt->nt_node); 585138568Ssam 586138568Ssam ieee80211_notify_scan_done(ic); 587138568Ssam 588116742Ssam if (ic->ic_opmode == IEEE80211_M_HOSTAP) { 589138568Ssam u_int8_t maxrssi[IEEE80211_CHAN_MAX]; /* XXX off stack? */ 590138568Ssam int i, bestchan; 591138568Ssam u_int8_t rssi; 592138568Ssam 593116742Ssam /* 594116742Ssam * The passive scan to look for existing AP's completed, 595116742Ssam * select a channel to camp on. Identify the channels 596116742Ssam * that already have one or more AP's and try to locate 597138568Ssam * an unnoccupied one. If that fails, pick a channel that 598138568Ssam * looks to be quietest. 599116742Ssam */ 600138568Ssam memset(maxrssi, 0, sizeof(maxrssi)); 601116742Ssam for (; ni != NULL; ni = nextbs) { 602116742Ssam ieee80211_ref_node(ni); 603116742Ssam nextbs = TAILQ_NEXT(ni, ni_list); 604138568Ssam rssi = ic->ic_node_getrssi(ni); 605138568Ssam i = ieee80211_chan2ieee(ic, ni->ni_chan); 606138568Ssam if (rssi > maxrssi[i]) 607138568Ssam maxrssi[i] = rssi; 608138568Ssam ieee80211_unref_node(&ni); 609116742Ssam } 610138568Ssam /* XXX select channel more intelligently */ 611138568Ssam bestchan = -1; 612116742Ssam for (i = 0; i < IEEE80211_CHAN_MAX; i++) 613138568Ssam if (isset(ic->ic_chan_active, i)) { 614138568Ssam /* 615138568Ssam * If the channel is unoccupied the max rssi 616138568Ssam * should be zero; just take it. Otherwise 617138568Ssam * track the channel with the lowest rssi and 618138568Ssam * use that when all channels appear occupied. 619138568Ssam */ 620138568Ssam if (maxrssi[i] == 0) { 621138568Ssam bestchan = i; 622116742Ssam break; 623138568Ssam } 624138568Ssam if (maxrssi[i] < maxrssi[bestchan]) 625138568Ssam bestchan = i; 626138568Ssam } 627138568Ssam if (bestchan != -1) { 628138568Ssam ieee80211_create_ibss(ic, &ic->ic_channels[bestchan]); 629138568Ssam return; 630116742Ssam } 631138568Ssam /* no suitable channel, should not happen */ 632138568Ssam } 633138568Ssam 634138568Ssam /* 635138568Ssam * When manually sequencing the state machine; scan just once 636138568Ssam * regardless of whether we have a candidate or not. The 637138568Ssam * controlling application is expected to setup state and 638138568Ssam * initiate an association. 639138568Ssam */ 640138568Ssam if (ic->ic_roaming == IEEE80211_ROAMING_MANUAL) 641116742Ssam return; 642138568Ssam /* 643138568Ssam * Automatic sequencing; look for a candidate and 644138568Ssam * if found join the network. 645138568Ssam */ 646116742Ssam if (ni == NULL) { 647138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, 648138568Ssam "%s: no scan candidate\n", __func__); 649116742Ssam notfound: 650116742Ssam if (ic->ic_opmode == IEEE80211_M_IBSS && 651116742Ssam (ic->ic_flags & IEEE80211_F_IBSSON) && 652116742Ssam ic->ic_des_esslen != 0) { 653116742Ssam ieee80211_create_ibss(ic, ic->ic_ibss_chan); 654116742Ssam return; 655116742Ssam } 656116742Ssam /* 657116742Ssam * Reset the list of channels to scan and start again. 658116742Ssam */ 659138568Ssam ieee80211_reset_scan(ic); 660138568Ssam ic->ic_flags |= IEEE80211_F_SCAN; 661138568Ssam ieee80211_next_scan(ic); 662116742Ssam return; 663116742Ssam } 664116742Ssam selbs = NULL; 665138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, "\t%s\n", 666138568Ssam "macaddr bssid chan rssi rate flag wep essid"); 667116742Ssam for (; ni != NULL; ni = nextbs) { 668116742Ssam ieee80211_ref_node(ni); 669116742Ssam nextbs = TAILQ_NEXT(ni, ni_list); 670116742Ssam if (ni->ni_fails) { 671116742Ssam /* 672116742Ssam * The configuration of the access points may change 673116742Ssam * during my scan. So delete the entry for the AP 674116742Ssam * and retry to associate if there is another beacon. 675116742Ssam */ 676138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, 677138568Ssam "%s: skip scan candidate %s, fails %u\n", 678138568Ssam __func__, ether_sprintf(ni->ni_macaddr), 679138568Ssam ni->ni_fails); 680116742Ssam if (ni->ni_fails++ > 2) 681138568Ssam ieee80211_free_node(ni); 682116742Ssam continue; 683116742Ssam } 684138568Ssam if (ieee80211_match_bss(ic, ni) == 0) { 685116742Ssam if (selbs == NULL) 686116742Ssam selbs = ni; 687138568Ssam else if (ieee80211_node_compare(ic, ni, selbs) > 0) { 688116742Ssam ieee80211_unref_node(&selbs); 689116742Ssam selbs = ni; 690116742Ssam } else 691116742Ssam ieee80211_unref_node(&ni); 692116742Ssam } else { 693116742Ssam ieee80211_unref_node(&ni); 694116742Ssam } 695116742Ssam } 696116742Ssam if (selbs == NULL) 697116742Ssam goto notfound; 698138568Ssam if (!ieee80211_sta_join(ic, selbs)) { 699138568Ssam ieee80211_unref_node(&selbs); 700138568Ssam goto notfound; 701138568Ssam } 702138568Ssam} 703138568Ssam 704138568Ssam/* 705138568Ssam * Handle 802.11 ad hoc network merge. The 706138568Ssam * convention, set by the Wireless Ethernet Compatibility Alliance 707138568Ssam * (WECA), is that an 802.11 station will change its BSSID to match 708138568Ssam * the "oldest" 802.11 ad hoc network, on the same channel, that 709138568Ssam * has the station's desired SSID. The "oldest" 802.11 network 710138568Ssam * sends beacons with the greatest TSF timestamp. 711138568Ssam * 712138568Ssam * The caller is assumed to validate TSF's before attempting a merge. 713138568Ssam * 714138568Ssam * Return !0 if the BSSID changed, 0 otherwise. 715138568Ssam */ 716138568Ssamint 717138568Ssamieee80211_ibss_merge(struct ieee80211com *ic, struct ieee80211_node *ni) 718138568Ssam{ 719138568Ssam 720138568Ssam if (IEEE80211_ADDR_EQ(ni->ni_bssid, ic->ic_bss->ni_bssid)) { 721138568Ssam /* unchanged, nothing to do */ 722138568Ssam return 0; 723138568Ssam } 724138568Ssam if (ieee80211_match_bss(ic, ni) != 0) { /* capabilities mismatch */ 725138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 726138568Ssam "%s: merge failed, capabilities mismatch\n", __func__); 727138568Ssam ic->ic_stats.is_ibss_capmismatch++; 728138568Ssam return 0; 729138568Ssam } 730138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 731138568Ssam "%s: new bssid %s: %s preamble, %s slot time%s\n", __func__, 732138568Ssam ether_sprintf(ni->ni_bssid), 733138568Ssam ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long", 734138568Ssam ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long", 735138568Ssam ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : "" 736138568Ssam ); 737138568Ssam return ieee80211_sta_join(ic, ni); 738138568Ssam} 739138568Ssam 740138568Ssam/* 741138568Ssam * Join the specified IBSS/BSS network. The node is assumed to 742138568Ssam * be passed in with a held reference. 743138568Ssam */ 744138568Ssamint 745138568Ssamieee80211_sta_join(struct ieee80211com *ic, struct ieee80211_node *selbs) 746138568Ssam{ 747138568Ssam struct ieee80211_node *obss; 748138568Ssam 749116742Ssam if (ic->ic_opmode == IEEE80211_M_IBSS) { 750138568Ssam /* 751138568Ssam * Check rate set before committing to this node. 752138568Ssam */ 753138568Ssam ieee80211_fix_rate(ic, selbs, IEEE80211_F_DOFRATE | 754116742Ssam IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 755138568Ssam if (selbs->ni_rates.rs_nrates == 0) { 756116742Ssam selbs->ni_fails++; 757138568Ssam ic->ic_stats.is_ibss_norate++; 758138568Ssam return 0; 759116742Ssam } 760127772Ssam /* 761138568Ssam * Create the neighbor table. 762127772Ssam */ 763138568Ssam ic->ic_sta = ieee80211_node_table_alloc(ic, 764138568Ssam "neighbor", ic->ic_inact_run, 765138568Ssam ieee80211_timeout_stations); 766138568Ssam if (ic->ic_sta == NULL) { 767138568Ssam /* 768138568Ssam * Should remain in SCAN state and retry. 769138568Ssam */ 770138568Ssam /* XXX stat+msg */ 771138568Ssam return 0; 772138568Ssam } 773138568Ssam } 774138568Ssam 775138568Ssam /* 776138568Ssam * Committed to selbs, setup state. 777138568Ssam */ 778138568Ssam obss = ic->ic_bss; 779138568Ssam ic->ic_bss = selbs; 780138568Ssam if (obss != NULL) 781138568Ssam ieee80211_free_node(obss); 782138568Ssam /* 783138568Ssam * Set the erp state (mostly the slot time) to deal with 784138568Ssam * the auto-select case; this should be redundant if the 785138568Ssam * mode is locked. 786138568Ssam */ 787138568Ssam ic->ic_curmode = ieee80211_chan2mode(ic, selbs->ni_chan); 788138568Ssam ieee80211_reset_erp(ic); 789138568Ssam ieee80211_wme_initparams(ic); 790138568Ssam if (ic->ic_opmode == IEEE80211_M_IBSS) 791117811Ssam ieee80211_new_state(ic, IEEE80211_S_RUN, -1); 792138568Ssam else 793117811Ssam ieee80211_new_state(ic, IEEE80211_S_AUTH, -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 } 839138568Ssam 840138568Ssam /* 841138568Ssam * Drain power save queue and, if needed, clear TIM. 842138568Ssam */ 843138568Ssam IEEE80211_NODE_SAVEQ_DRAIN(ni, qlen); 844138568Ssam if (qlen != 0 && ic->ic_set_tim != NULL) 845138568Ssam ic->ic_set_tim(ic, ni, 0); 846138568Ssam 847138568Ssam ni->ni_associd = 0; 848138568Ssam if (ni->ni_challenge != NULL) { 849138568Ssam FREE(ni->ni_challenge, M_DEVBUF); 850138568Ssam ni->ni_challenge = NULL; 851138568Ssam } 852138568Ssam /* 853138568Ssam * Preserve SSID, WPA, and WME ie's so the bss node is 854138568Ssam * reusable during a re-auth/re-assoc state transition. 855138568Ssam * If we remove these data they will not be recreated 856138568Ssam * because they come from a probe-response or beacon frame 857138568Ssam * which cannot be expected prior to the association-response. 858138568Ssam * This should not be an issue when operating in other modes 859138568Ssam * as stations leaving always go through a full state transition 860138568Ssam * which will rebuild this state. 861138568Ssam * 862138568Ssam * XXX does this leave us open to inheriting old state? 863138568Ssam */ 864138568Ssam for (i = 0; i < N(ni->ni_rxfrag); i++) 865138568Ssam if (ni->ni_rxfrag[i] != NULL) { 866138568Ssam m_freem(ni->ni_rxfrag[i]); 867138568Ssam ni->ni_rxfrag[i] = NULL; 868138568Ssam } 869138568Ssam ieee80211_crypto_delkey(ic, &ni->ni_ucastkey); 870138568Ssam#undef N 871116742Ssam} 872116742Ssam 873116742Ssamstatic void 874138568Ssamnode_free(struct ieee80211_node *ni) 875116742Ssam{ 876138568Ssam struct ieee80211com *ic = ni->ni_ic; 877138568Ssam 878138568Ssam ic->ic_node_cleanup(ni); 879138568Ssam if (ni->ni_wpa_ie != NULL) 880138568Ssam FREE(ni->ni_wpa_ie, M_DEVBUF); 881138568Ssam if (ni->ni_wme_ie != NULL) 882138568Ssam FREE(ni->ni_wme_ie, M_DEVBUF); 883138568Ssam IEEE80211_NODE_SAVEQ_DESTROY(ni); 884138568Ssam FREE(ni, M_80211_NODE); 885116742Ssam} 886116742Ssam 887120104Ssamstatic u_int8_t 888138568Ssamnode_getrssi(const struct ieee80211_node *ni) 889120104Ssam{ 890120104Ssam return ni->ni_rssi; 891120104Ssam} 892120104Ssam 893116742Ssamstatic void 894138568Ssamieee80211_setup_node(struct ieee80211_node_table *nt, 895138568Ssam struct ieee80211_node *ni, const u_int8_t *macaddr) 896116742Ssam{ 897138568Ssam struct ieee80211com *ic = nt->nt_ic; 898116742Ssam int hash; 899116742Ssam 900138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 901138568Ssam "%s %s in %s table\n", __func__, 902138568Ssam ether_sprintf(macaddr), nt->nt_name); 903138568Ssam 904116742Ssam IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 905116742Ssam hash = IEEE80211_NODE_HASH(macaddr); 906138568Ssam ieee80211_node_initref(ni); /* mark referenced */ 907138568Ssam ni->ni_chan = IEEE80211_CHAN_ANYC; 908138568Ssam ni->ni_authmode = IEEE80211_AUTH_OPEN; 909138568Ssam ni->ni_txpower = ic->ic_txpowlimit; /* max power */ 910138568Ssam ieee80211_crypto_resetkey(ic, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE); 911138568Ssam ni->ni_inact = ni->ni_inact_reload = nt->nt_inact_init; 912138568Ssam IEEE80211_NODE_SAVEQ_INIT(ni, "unknown"); 913138568Ssam 914138568Ssam IEEE80211_NODE_LOCK(nt); 915138568Ssam TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list); 916138568Ssam LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash); 917138568Ssam ni->ni_table = nt; 918138568Ssam ni->ni_ic = ic; 919138568Ssam IEEE80211_NODE_UNLOCK(nt); 920116742Ssam} 921116742Ssam 922116742Ssamstruct ieee80211_node * 923138568Ssamieee80211_alloc_node(struct ieee80211_node_table *nt, const u_int8_t *macaddr) 924116742Ssam{ 925138568Ssam struct ieee80211com *ic = nt->nt_ic; 926138568Ssam struct ieee80211_node *ni; 927138568Ssam 928138568Ssam ni = ic->ic_node_alloc(nt); 929116742Ssam if (ni != NULL) 930138568Ssam ieee80211_setup_node(nt, ni, macaddr); 931127769Ssam else 932127769Ssam ic->ic_stats.is_rx_nodealloc++; 933116742Ssam return ni; 934116742Ssam} 935116742Ssam 936116742Ssamstruct ieee80211_node * 937138568Ssamieee80211_dup_bss(struct ieee80211_node_table *nt, const u_int8_t *macaddr) 938116742Ssam{ 939138568Ssam struct ieee80211com *ic = nt->nt_ic; 940138568Ssam struct ieee80211_node *ni; 941138568Ssam 942138568Ssam ni = ic->ic_node_alloc(nt); 943116742Ssam if (ni != NULL) { 944138568Ssam ieee80211_setup_node(nt, ni, macaddr); 945127770Ssam /* 946127770Ssam * Inherit from ic_bss. 947127770Ssam */ 948138568Ssam ni->ni_authmode = ic->ic_bss->ni_authmode; 949138568Ssam ni->ni_txpower = ic->ic_bss->ni_txpower; 950138568Ssam ni->ni_vlan = ic->ic_bss->ni_vlan; /* XXX?? */ 951127770Ssam IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_bss->ni_bssid); 952138568Ssam ieee80211_set_chan(ic, ni, ic->ic_bss->ni_chan); 953138568Ssam ni->ni_rsn = ic->ic_bss->ni_rsn; 954127770Ssam } else 955127770Ssam ic->ic_stats.is_rx_nodealloc++; 956116742Ssam return ni; 957116742Ssam} 958116742Ssam 959127772Ssamstatic struct ieee80211_node * 960138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 961138568Ssam_ieee80211_find_node_debug(struct ieee80211_node_table *nt, 962138568Ssam const u_int8_t *macaddr, const char *func, int line) 963138568Ssam#else 964138568Ssam_ieee80211_find_node(struct ieee80211_node_table *nt, 965138568Ssam const u_int8_t *macaddr) 966138568Ssam#endif 967116742Ssam{ 968116742Ssam struct ieee80211_node *ni; 969116742Ssam int hash; 970116742Ssam 971138568Ssam IEEE80211_NODE_LOCK_ASSERT(nt); 972127772Ssam 973116742Ssam hash = IEEE80211_NODE_HASH(macaddr); 974138568Ssam LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 975116742Ssam if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 976138568Ssam ieee80211_ref_node(ni); /* mark referenced */ 977138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 978138568Ssam IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE, 979138568Ssam "%s (%s:%u) %s refcnt %d\n", __func__, func, line, 980138568Ssam ether_sprintf(ni->ni_macaddr), 981138568Ssam ieee80211_node_refcnt(ni)); 982138568Ssam#endif 983127772Ssam return ni; 984116742Ssam } 985116742Ssam } 986127772Ssam return NULL; 987127772Ssam} 988138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 989138568Ssam#define _ieee80211_find_node(nt, mac) \ 990138568Ssam _ieee80211_find_node_debug(nt, mac, func, line) 991138568Ssam#endif 992127772Ssam 993127772Ssamstruct ieee80211_node * 994138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 995138568Ssamieee80211_find_node_debug(struct ieee80211_node_table *nt, 996138568Ssam const u_int8_t *macaddr, const char *func, int line) 997138568Ssam#else 998138568Ssamieee80211_find_node(struct ieee80211_node_table *nt, const u_int8_t *macaddr) 999138568Ssam#endif 1000127772Ssam{ 1001127772Ssam struct ieee80211_node *ni; 1002127772Ssam 1003138568Ssam IEEE80211_NODE_LOCK(nt); 1004138568Ssam ni = _ieee80211_find_node(nt, macaddr); 1005138568Ssam IEEE80211_NODE_UNLOCK(nt); 1006116742Ssam return ni; 1007116742Ssam} 1008116742Ssam 1009116742Ssam/* 1010138568Ssam * Fake up a node; this handles node discovery in adhoc mode. 1011138568Ssam * Note that for the driver's benefit we we treat this like 1012138568Ssam * an association so the driver has an opportunity to setup 1013138568Ssam * it's private state. 1014138568Ssam */ 1015138568Ssamstruct ieee80211_node * 1016138568Ssamieee80211_fakeup_adhoc_node(struct ieee80211_node_table *nt, 1017138568Ssam const u_int8_t macaddr[IEEE80211_ADDR_LEN]) 1018138568Ssam{ 1019138568Ssam struct ieee80211com *ic = nt->nt_ic; 1020138568Ssam struct ieee80211_node *ni; 1021138568Ssam 1022138568Ssam ni = ieee80211_dup_bss(nt, macaddr); 1023138568Ssam if (ni != NULL) { 1024138568Ssam /* XXX no rate negotiation; just dup */ 1025138568Ssam ni->ni_rates = ic->ic_bss->ni_rates; 1026138568Ssam if (ic->ic_newassoc) 1027138568Ssam ic->ic_newassoc(ic, ni, 1); 1028138568Ssam /* XXX not right for 802.1x/WPA */ 1029138568Ssam ieee80211_node_authorize(ic, ni); 1030138568Ssam ieee80211_ref_node(ni); /* hold reference */ 1031138568Ssam } 1032138568Ssam return ni; 1033138568Ssam} 1034138568Ssam 1035138568Ssam/* 1036138568Ssam * Locate the node for sender, track state, and then pass the 1037138568Ssam * (referenced) node up to the 802.11 layer for its use. We 1038138568Ssam * are required to pass some node so we fall back to ic_bss 1039138568Ssam * when this frame is from an unknown sender. The 802.11 layer 1040138568Ssam * knows this means the sender wasn't in the node table and 1041138568Ssam * acts accordingly. 1042138568Ssam */ 1043138568Ssamstruct ieee80211_node * 1044138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1045138568Ssamieee80211_find_rxnode_debug(struct ieee80211com *ic, 1046138568Ssam const struct ieee80211_frame_min *wh, const char *func, int line) 1047138568Ssam#else 1048138568Ssamieee80211_find_rxnode(struct ieee80211com *ic, 1049138568Ssam const struct ieee80211_frame_min *wh) 1050138568Ssam#endif 1051138568Ssam{ 1052138568Ssam#define IS_CTL(wh) \ 1053138568Ssam ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) == IEEE80211_FC0_TYPE_CTL) 1054138568Ssam#define IS_PSPOLL(wh) \ 1055138568Ssam ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == IEEE80211_FC0_SUBTYPE_PS_POLL) 1056138568Ssam struct ieee80211_node_table *nt; 1057138568Ssam struct ieee80211_node *ni; 1058138568Ssam 1059138568Ssam /* XXX may want scanned nodes in the neighbor table for adhoc */ 1060138568Ssam if (ic->ic_opmode == IEEE80211_M_STA || 1061138568Ssam ic->ic_opmode == IEEE80211_M_MONITOR || 1062138568Ssam (ic->ic_flags & IEEE80211_F_SCAN)) 1063138568Ssam nt = &ic->ic_scan; 1064138568Ssam else 1065138568Ssam nt = ic->ic_sta; 1066138568Ssam /* XXX check ic_bss first in station mode */ 1067138568Ssam /* XXX 4-address frames? */ 1068138568Ssam IEEE80211_NODE_LOCK(nt); 1069138568Ssam if (IS_CTL(wh) && !IS_PSPOLL(wh) /*&& !IS_RTS(ah)*/) 1070138568Ssam ni = _ieee80211_find_node(nt, wh->i_addr1); 1071138568Ssam else 1072138568Ssam ni = _ieee80211_find_node(nt, wh->i_addr2); 1073138568Ssam IEEE80211_NODE_UNLOCK(nt); 1074138568Ssam 1075138568Ssam return (ni != NULL ? ni : ieee80211_ref_node(ic->ic_bss)); 1076138568Ssam#undef IS_PSPOLL 1077138568Ssam#undef IS_CTL 1078138568Ssam} 1079138568Ssam 1080138568Ssam/* 1081127772Ssam * Return a reference to the appropriate node for sending 1082127772Ssam * a data frame. This handles node discovery in adhoc networks. 1083127772Ssam */ 1084127772Ssamstruct ieee80211_node * 1085138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1086138568Ssamieee80211_find_txnode_debug(struct ieee80211com *ic, const u_int8_t *macaddr, 1087138568Ssam const char *func, int line) 1088138568Ssam#else 1089138568Ssamieee80211_find_txnode(struct ieee80211com *ic, const u_int8_t *macaddr) 1090138568Ssam#endif 1091127772Ssam{ 1092138568Ssam struct ieee80211_node_table *nt = ic->ic_sta; 1093127772Ssam struct ieee80211_node *ni; 1094127772Ssam 1095127772Ssam /* 1096127772Ssam * The destination address should be in the node table 1097127772Ssam * unless we are operating in station mode or this is a 1098127772Ssam * multicast/broadcast frame. 1099127772Ssam */ 1100138568Ssam if (nt == NULL || IEEE80211_IS_MULTICAST(macaddr)) 1101138568Ssam return ieee80211_ref_node(ic->ic_bss); 1102127772Ssam 1103127772Ssam /* XXX can't hold lock across dup_bss 'cuz of recursive locking */ 1104138568Ssam IEEE80211_NODE_LOCK(nt); 1105138568Ssam ni = _ieee80211_find_node(nt, macaddr); 1106138568Ssam IEEE80211_NODE_UNLOCK(nt); 1107138568Ssam 1108138568Ssam if (ni == NULL) { 1109138568Ssam if (ic->ic_opmode == IEEE80211_M_IBSS || 1110138568Ssam ic->ic_opmode == IEEE80211_M_AHDEMO) 1111138568Ssam ni = ieee80211_fakeup_adhoc_node(nt, macaddr); 1112138568Ssam else { 1113138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_OUTPUT, 1114138568Ssam "[%s] no node, discard frame (%s)\n", 1115138568Ssam ether_sprintf(macaddr), __func__); 1116138568Ssam ic->ic_stats.is_tx_nonode++; 1117127772Ssam } 1118127772Ssam } 1119127772Ssam return ni; 1120127772Ssam} 1121127772Ssam 1122127772Ssam/* 1123116742Ssam * Like find but search based on the channel too. 1124116742Ssam */ 1125116742Ssamstruct ieee80211_node * 1126138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1127138568Ssamieee80211_find_node_with_channel_debug(struct ieee80211_node_table *nt, 1128138568Ssam const u_int8_t *macaddr, struct ieee80211_channel *chan, 1129138568Ssam const char *func, int line) 1130138568Ssam#else 1131138568Ssamieee80211_find_node_with_channel(struct ieee80211_node_table *nt, 1132138568Ssam const u_int8_t *macaddr, struct ieee80211_channel *chan) 1133138568Ssam#endif 1134116742Ssam{ 1135116742Ssam struct ieee80211_node *ni; 1136116742Ssam int hash; 1137116742Ssam 1138116742Ssam hash = IEEE80211_NODE_HASH(macaddr); 1139138568Ssam IEEE80211_NODE_LOCK(nt); 1140138568Ssam LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1141127772Ssam if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr) && 1142127772Ssam ni->ni_chan == chan) { 1143138568Ssam ieee80211_ref_node(ni); /* mark referenced */ 1144138568Ssam IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE, 1145138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1146138568Ssam "%s (%s:%u) %s refcnt %d\n", __func__, func, line, 1147138568Ssam#else 1148138568Ssam "%s %s refcnt %d\n", __func__, 1149138568Ssam#endif 1150138568Ssam ether_sprintf(ni->ni_macaddr), 1151138568Ssam ieee80211_node_refcnt(ni)); 1152116742Ssam break; 1153116742Ssam } 1154116742Ssam } 1155138568Ssam IEEE80211_NODE_UNLOCK(nt); 1156116742Ssam return ni; 1157116742Ssam} 1158116742Ssam 1159138568Ssam/* 1160138568Ssam * Like find but search based on the ssid too. 1161138568Ssam */ 1162138568Ssamstruct ieee80211_node * 1163138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1164138568Ssamieee80211_find_node_with_ssid_debug(struct ieee80211_node_table *nt, 1165138568Ssam const u_int8_t *macaddr, u_int ssidlen, const u_int8_t *ssid, 1166138568Ssam const char *func, int line) 1167138568Ssam#else 1168138568Ssamieee80211_find_node_with_ssid(struct ieee80211_node_table *nt, 1169138568Ssam const u_int8_t *macaddr, u_int ssidlen, const u_int8_t *ssid) 1170138568Ssam#endif 1171138568Ssam{ 1172138568Ssam struct ieee80211com *ic = nt->nt_ic; 1173138568Ssam struct ieee80211_node *ni; 1174138568Ssam int hash; 1175138568Ssam 1176138568Ssam hash = IEEE80211_NODE_HASH(macaddr); 1177138568Ssam IEEE80211_NODE_LOCK(nt); 1178138568Ssam LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1179138568Ssam if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr) && 1180138568Ssam ni->ni_esslen == ic->ic_des_esslen && 1181138568Ssam memcmp(ni->ni_essid, ic->ic_des_essid, ni->ni_esslen) == 0) { 1182138568Ssam ieee80211_ref_node(ni); /* mark referenced */ 1183138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1184138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1185138568Ssam "%s (%s:%u) %s refcnt %d\n", __func__, func, line, 1186138568Ssam#else 1187138568Ssam "%s %s refcnt %d\n", __func__, 1188138568Ssam#endif 1189138568Ssam ether_sprintf(ni->ni_macaddr), 1190138568Ssam ieee80211_node_refcnt(ni)); 1191138568Ssam break; 1192138568Ssam } 1193138568Ssam } 1194138568Ssam IEEE80211_NODE_UNLOCK(nt); 1195138568Ssam return ni; 1196138568Ssam} 1197138568Ssam 1198138568Ssam 1199116742Ssamstatic void 1200138568Ssam_ieee80211_free_node(struct ieee80211_node *ni) 1201116742Ssam{ 1202138568Ssam struct ieee80211com *ic = ni->ni_ic; 1203138568Ssam struct ieee80211_node_table *nt = ni->ni_table; 1204119150Ssam 1205138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1206138568Ssam "%s %s in %s table\n", __func__, ether_sprintf(ni->ni_macaddr), 1207138568Ssam nt != NULL ? nt->nt_name : "<gone>"); 1208138568Ssam 1209138568Ssam IEEE80211_AID_CLR(ni->ni_associd, ic->ic_aid_bitmap); 1210138568Ssam if (nt != NULL) { 1211138568Ssam TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1212138568Ssam LIST_REMOVE(ni, ni_hash); 1213138568Ssam } 1214138568Ssam ic->ic_node_free(ni); 1215116742Ssam} 1216116742Ssam 1217116742Ssamvoid 1218138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1219138568Ssamieee80211_free_node_debug(struct ieee80211_node *ni, const char *func, int line) 1220138568Ssam#else 1221138568Ssamieee80211_free_node(struct ieee80211_node *ni) 1222138568Ssam#endif 1223116742Ssam{ 1224138568Ssam struct ieee80211_node_table *nt = ni->ni_table; 1225119150Ssam 1226138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1227138568Ssam IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE, 1228138568Ssam "%s (%s:%u) %s refcnt %d\n", __func__, func, line, 1229138568Ssam ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1); 1230138568Ssam#endif 1231138568Ssam if (ieee80211_node_dectestref(ni)) { 1232138568Ssam /* 1233138568Ssam * Beware; if the node is marked gone then it's already 1234138568Ssam * been removed from the table and we cannot assume the 1235138568Ssam * table still exists. Regardless, there's no need to lock 1236138568Ssam * the table. 1237138568Ssam */ 1238138568Ssam if (ni->ni_table != NULL) { 1239138568Ssam IEEE80211_NODE_LOCK(nt); 1240138568Ssam _ieee80211_free_node(ni); 1241138568Ssam IEEE80211_NODE_UNLOCK(nt); 1242138568Ssam } else 1243138568Ssam _ieee80211_free_node(ni); 1244116742Ssam } 1245116742Ssam} 1246116742Ssam 1247138568Ssam/* 1248138568Ssam * Reclaim a node. If this is the last reference count then 1249138568Ssam * do the normal free work. Otherwise remove it from the node 1250138568Ssam * table and mark it gone by clearing the back-reference. 1251138568Ssam */ 1252138568Ssamstatic void 1253138568Ssamnode_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 1254116742Ssam{ 1255138568Ssam 1256138568Ssam if (!ieee80211_node_dectestref(ni)) { 1257138568Ssam /* 1258138568Ssam * Other references are present, just remove the 1259138568Ssam * node from the table so it cannot be found. When 1260138568Ssam * the references are dropped storage will be 1261138568Ssam * reclaimed. This normally only happens for ic_bss. 1262138568Ssam */ 1263138568Ssam TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1264138568Ssam LIST_REMOVE(ni, ni_hash); 1265138568Ssam ni->ni_table = NULL; /* clear reference */ 1266138568Ssam } else 1267138568Ssam _ieee80211_free_node(ni); 1268138568Ssam} 1269138568Ssam 1270138568Ssamstatic void 1271138568Ssamieee80211_free_allnodes_locked(struct ieee80211_node_table *nt) 1272138568Ssam{ 1273138568Ssam struct ieee80211com *ic = nt->nt_ic; 1274116742Ssam struct ieee80211_node *ni; 1275116742Ssam 1276138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1277138568Ssam "%s: free all nodes in %s table\n", __func__, nt->nt_name); 1278138568Ssam 1279138568Ssam while ((ni = TAILQ_FIRST(&nt->nt_node)) != NULL) { 1280138568Ssam if (ni->ni_associd != 0) { 1281138568Ssam if (ic->ic_auth->ia_node_leave != NULL) 1282138568Ssam ic->ic_auth->ia_node_leave(ic, ni); 1283138568Ssam IEEE80211_AID_CLR(ni->ni_associd, ic->ic_aid_bitmap); 1284138568Ssam } 1285138568Ssam node_reclaim(nt, ni); 1286138568Ssam } 1287138568Ssam ieee80211_reset_erp(ic); 1288116742Ssam} 1289116742Ssam 1290138568Ssamstatic void 1291138568Ssamieee80211_free_allnodes(struct ieee80211_node_table *nt) 1292138568Ssam{ 1293138568Ssam 1294138568Ssam IEEE80211_NODE_LOCK(nt); 1295138568Ssam ieee80211_free_allnodes_locked(nt); 1296138568Ssam IEEE80211_NODE_UNLOCK(nt); 1297138568Ssam} 1298138568Ssam 1299120483Ssam/* 1300138568Ssam * Timeout entries in the scan cache. 1301138568Ssam */ 1302138568Ssamstatic void 1303138568Ssamieee80211_timeout_scan_candidates(struct ieee80211_node_table *nt) 1304138568Ssam{ 1305138568Ssam struct ieee80211com *ic = nt->nt_ic; 1306138568Ssam struct ieee80211_node *ni, *tni; 1307138568Ssam 1308138568Ssam IEEE80211_NODE_LOCK(nt); 1309138568Ssam ni = ic->ic_bss; 1310138568Ssam /* XXX belongs elsewhere */ 1311138568Ssam if (ni->ni_rxfrag[0] != NULL && ticks > ni->ni_rxfragstamp + hz) { 1312138568Ssam m_freem(ni->ni_rxfrag[0]); 1313138568Ssam ni->ni_rxfrag[0] = NULL; 1314138568Ssam } 1315138568Ssam TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, tni) { 1316138568Ssam if (ni->ni_inact && --ni->ni_inact == 0) { 1317138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1318138568Ssam "[%s] scan candidate purged from cache " 1319138568Ssam "(refcnt %u)\n", ether_sprintf(ni->ni_macaddr), 1320138568Ssam ieee80211_node_refcnt(ni)-1); 1321138568Ssam node_reclaim(nt, ni); 1322138568Ssam } 1323138568Ssam } 1324138568Ssam IEEE80211_NODE_UNLOCK(nt); 1325138568Ssam 1326138568Ssam nt->nt_inact_timer = IEEE80211_INACT_WAIT; 1327138568Ssam} 1328138568Ssam 1329138568Ssam/* 1330138568Ssam * Timeout inactive stations and do related housekeeping. 1331138568Ssam * Note that we cannot hold the node lock while sending a 1332138568Ssam * frame as this would lead to a LOR. Instead we use a 1333138568Ssam * generation number to mark nodes that we've scanned and 1334138568Ssam * drop the lock and restart a scan if we have to time out 1335138568Ssam * a node. Since we are single-threaded by virtue of 1336120483Ssam * controlling the inactivity timer we can be sure this will 1337120483Ssam * process each node only once. 1338120483Ssam */ 1339138568Ssamstatic void 1340138568Ssamieee80211_timeout_stations(struct ieee80211_node_table *nt) 1341116742Ssam{ 1342138568Ssam struct ieee80211com *ic = nt->nt_ic; 1343120483Ssam struct ieee80211_node *ni; 1344138568Ssam u_int gen; 1345116742Ssam 1346138568Ssam IEEE80211_SCAN_LOCK(nt); 1347138568Ssam gen = nt->nt_scangen++; 1348138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1349138568Ssam "%s: sta scangen %u\n", __func__, gen); 1350120483Ssamrestart: 1351138568Ssam IEEE80211_NODE_LOCK(nt); 1352138568Ssam TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 1353120483Ssam if (ni->ni_scangen == gen) /* previously handled */ 1354120483Ssam continue; 1355120483Ssam ni->ni_scangen = gen; 1356138568Ssam /* 1357138568Ssam * Free fragment if not needed anymore 1358138568Ssam * (last fragment older than 1s). 1359138568Ssam * XXX doesn't belong here 1360138568Ssam */ 1361138568Ssam if (ni->ni_rxfrag[0] != NULL && 1362138568Ssam ticks > ni->ni_rxfragstamp + hz) { 1363138568Ssam m_freem(ni->ni_rxfrag[0]); 1364138568Ssam ni->ni_rxfrag[0] = NULL; 1365138568Ssam } 1366138568Ssam ni->ni_inact--; 1367138568Ssam if (ni->ni_associd != 0) { 1368119150Ssam /* 1369138568Ssam * Age frames on the power save queue. The 1370138568Ssam * aging interval is 4 times the listen 1371138568Ssam * interval specified by the station. This 1372138568Ssam * number is factored into the age calculations 1373138568Ssam * when the frame is placed on the queue. We 1374138568Ssam * store ages as time differences we can check 1375138568Ssam * and/or adjust only the head of the list. 1376138568Ssam */ 1377138568Ssam if (IEEE80211_NODE_SAVEQ_QLEN(ni) != 0) { 1378138568Ssam struct mbuf *m; 1379138568Ssam int discard = 0; 1380138568Ssam 1381138568Ssam IEEE80211_NODE_SAVEQ_LOCK(ni); 1382138568Ssam while (IF_POLL(&ni->ni_savedq, m) != NULL && 1383138568Ssam M_AGE_GET(m) < IEEE80211_INACT_WAIT) { 1384138568SsamIEEE80211_DPRINTF(ic, IEEE80211_MSG_POWER, "[%s] discard frame, age %u\n", ether_sprintf(ni->ni_macaddr), M_AGE_GET(m));/*XXX*/ 1385138568Ssam _IEEE80211_NODE_SAVEQ_DEQUEUE_HEAD(ni, m); 1386138568Ssam m_freem(m); 1387138568Ssam discard++; 1388138568Ssam } 1389138568Ssam if (m != NULL) 1390138568Ssam M_AGE_SUB(m, IEEE80211_INACT_WAIT); 1391138568Ssam IEEE80211_NODE_SAVEQ_UNLOCK(ni); 1392138568Ssam 1393138568Ssam if (discard != 0) { 1394138568Ssam IEEE80211_DPRINTF(ic, 1395138568Ssam IEEE80211_MSG_POWER, 1396138568Ssam "[%s] discard %u frames for age\n", 1397138568Ssam ether_sprintf(ni->ni_macaddr), 1398138568Ssam discard); 1399138568Ssam IEEE80211_NODE_STAT_ADD(ni, 1400138568Ssam ps_discard, discard); 1401138568Ssam if (IEEE80211_NODE_SAVEQ_QLEN(ni) == 0) 1402138568Ssam ic->ic_set_tim(ic, ni, 0); 1403138568Ssam } 1404138568Ssam } 1405138568Ssam /* 1406138568Ssam * Probe the station before time it out. We 1407138568Ssam * send a null data frame which may not be 1408138568Ssam * universally supported by drivers (need it 1409138568Ssam * for ps-poll support so it should be...). 1410138568Ssam */ 1411138568Ssam if (ni->ni_inact == ic->ic_inact_probe) { 1412138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1413138568Ssam "[%s] probe station due to inactivity\n", 1414138568Ssam ether_sprintf(ni->ni_macaddr)); 1415138568Ssam IEEE80211_NODE_UNLOCK(nt); 1416138568Ssam ieee80211_send_nulldata(ic, ni); 1417138568Ssam /* XXX stat? */ 1418138568Ssam goto restart; 1419138568Ssam } 1420138568Ssam } 1421138568Ssam if (ni->ni_inact <= 0) { 1422138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1423138568Ssam "[%s] station timed out due to inactivity " 1424138568Ssam "(refcnt %u)\n", ether_sprintf(ni->ni_macaddr), 1425138568Ssam ieee80211_node_refcnt(ni)); 1426138568Ssam /* 1427138568Ssam * Send a deauthenticate frame and drop the station. 1428138568Ssam * This is somewhat complicated due to reference counts 1429138568Ssam * and locking. At this point a station will typically 1430138568Ssam * have a reference count of 1. ieee80211_node_leave 1431138568Ssam * will do a "free" of the node which will drop the 1432138568Ssam * reference count. But in the meantime a reference 1433138568Ssam * wil be held by the deauth frame. The actual reclaim 1434138568Ssam * of the node will happen either after the tx is 1435138568Ssam * completed or by ieee80211_node_leave. 1436120483Ssam * 1437138568Ssam * Separately we must drop the node lock before sending 1438138568Ssam * in case the driver takes a lock, as this will result 1439138568Ssam * in LOR between the node lock and the driver lock. 1440119150Ssam */ 1441138568Ssam IEEE80211_NODE_UNLOCK(nt); 1442138568Ssam if (ni->ni_associd != 0) { 1443138568Ssam IEEE80211_SEND_MGMT(ic, ni, 1444138568Ssam IEEE80211_FC0_SUBTYPE_DEAUTH, 1445138568Ssam IEEE80211_REASON_AUTH_EXPIRE); 1446138568Ssam } 1447138568Ssam ieee80211_node_leave(ic, ni); 1448121180Ssam ic->ic_stats.is_node_timeout++; 1449120483Ssam goto restart; 1450120483Ssam } 1451116742Ssam } 1452138568Ssam IEEE80211_NODE_UNLOCK(nt); 1453138568Ssam 1454138568Ssam IEEE80211_SCAN_UNLOCK(nt); 1455138568Ssam 1456138568Ssam nt->nt_inact_timer = IEEE80211_INACT_WAIT; 1457116742Ssam} 1458116742Ssam 1459116742Ssamvoid 1460138568Ssamieee80211_iterate_nodes(struct ieee80211_node_table *nt, ieee80211_iter_func *f, void *arg) 1461116742Ssam{ 1462116742Ssam struct ieee80211_node *ni; 1463138568Ssam u_int gen; 1464116742Ssam 1465138568Ssam IEEE80211_SCAN_LOCK(nt); 1466138568Ssam gen = nt->nt_scangen++; 1467138568Ssam 1468138568Ssam IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE, 1469138568Ssam "%s: sta scangen %u\n", __func__, gen); 1470138568Ssamrestart: 1471138568Ssam IEEE80211_NODE_LOCK(nt); 1472138568Ssam TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 1473138568Ssam if (ni->ni_scangen != gen) { 1474138568Ssam ni->ni_scangen = gen; 1475138568Ssam (void) ieee80211_ref_node(ni); 1476138568Ssam IEEE80211_NODE_UNLOCK(nt); 1477138568Ssam (*f)(arg, ni); 1478138568Ssam ieee80211_free_node(ni); 1479138568Ssam goto restart; 1480138568Ssam } 1481138568Ssam } 1482138568Ssam IEEE80211_NODE_UNLOCK(nt); 1483138568Ssam 1484138568Ssam IEEE80211_SCAN_UNLOCK(nt); 1485116742Ssam} 1486138568Ssam 1487138568Ssamvoid 1488138568Ssamieee80211_dump_node(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 1489138568Ssam{ 1490138568Ssam printf("0x%p: mac %s refcnt %d\n", ni, 1491138568Ssam ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)); 1492138568Ssam printf("\tscangen %u authmode %u flags 0x%x\n", 1493138568Ssam ni->ni_scangen, ni->ni_authmode, ni->ni_flags); 1494138568Ssam printf("\tassocid 0x%x txpower %u vlan %u\n", 1495138568Ssam ni->ni_associd, ni->ni_txpower, ni->ni_vlan); 1496138568Ssam printf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n", 1497138568Ssam ni->ni_txseqs[0], 1498138568Ssam ni->ni_rxseqs[0] >> IEEE80211_SEQ_SEQ_SHIFT, 1499138568Ssam ni->ni_rxseqs[0] & IEEE80211_SEQ_FRAG_MASK, 1500138568Ssam ni->ni_rxfragstamp); 1501138568Ssam printf("\trstamp %u rssi %u intval %u capinfo 0x%x\n", 1502138568Ssam ni->ni_rstamp, ni->ni_rssi, ni->ni_intval, ni->ni_capinfo); 1503138568Ssam printf("\tbssid %s essid \"%.*s\" channel %u:0x%x\n", 1504138568Ssam ether_sprintf(ni->ni_bssid), 1505138568Ssam ni->ni_esslen, ni->ni_essid, 1506138568Ssam ni->ni_chan->ic_freq, ni->ni_chan->ic_flags); 1507138568Ssam printf("\tfails %u inact %u txrate %u\n", 1508138568Ssam ni->ni_fails, ni->ni_inact, ni->ni_txrate); 1509138568Ssam} 1510138568Ssam 1511138568Ssamvoid 1512138568Ssamieee80211_dump_nodes(struct ieee80211_node_table *nt) 1513138568Ssam{ 1514138568Ssam ieee80211_iterate_nodes(nt, 1515138568Ssam (ieee80211_iter_func *) ieee80211_dump_node, nt); 1516138568Ssam} 1517138568Ssam 1518138568Ssam/* 1519138568Ssam * Handle a station joining an 11g network. 1520138568Ssam */ 1521138568Ssamstatic void 1522138568Ssamieee80211_node_join_11g(struct ieee80211com *ic, struct ieee80211_node *ni) 1523138568Ssam{ 1524138568Ssam 1525138568Ssam /* 1526138568Ssam * Station isn't capable of short slot time. Bump 1527138568Ssam * the count of long slot time stations and disable 1528138568Ssam * use of short slot time. Note that the actual switch 1529138568Ssam * over to long slot time use may not occur until the 1530138568Ssam * next beacon transmission (per sec. 7.3.1.4 of 11g). 1531138568Ssam */ 1532138568Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 1533138568Ssam ic->ic_longslotsta++; 1534138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1535138568Ssam "[%s] station needs long slot time, count %d\n", 1536138568Ssam ether_sprintf(ni->ni_macaddr), ic->ic_longslotsta); 1537138568Ssam /* XXX vap's w/ conflicting needs won't work */ 1538138568Ssam ieee80211_set_shortslottime(ic, 0); 1539138568Ssam } 1540138568Ssam /* 1541138568Ssam * If the new station is not an ERP station 1542138568Ssam * then bump the counter and enable protection 1543138568Ssam * if configured. 1544138568Ssam */ 1545138568Ssam if (!ieee80211_iserp_rateset(ic, &ni->ni_rates)) { 1546138568Ssam ic->ic_nonerpsta++; 1547138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1548138568Ssam "[%s] station is !ERP, %d non-ERP stations associated\n", 1549138568Ssam ether_sprintf(ni->ni_macaddr), ic->ic_nonerpsta); 1550138568Ssam /* 1551138568Ssam * If protection is configured, enable it. 1552138568Ssam */ 1553138568Ssam if (ic->ic_protmode != IEEE80211_PROT_NONE) { 1554138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1555138568Ssam "%s: enable use of protection\n", __func__); 1556138568Ssam ic->ic_flags |= IEEE80211_F_USEPROT; 1557138568Ssam } 1558138568Ssam /* 1559138568Ssam * If station does not support short preamble 1560138568Ssam * then we must enable use of Barker preamble. 1561138568Ssam */ 1562138568Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) { 1563138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1564138568Ssam "[%s] station needs long preamble\n", 1565138568Ssam ether_sprintf(ni->ni_macaddr)); 1566138568Ssam ic->ic_flags |= IEEE80211_F_USEBARKER; 1567138568Ssam ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; 1568138568Ssam } 1569138568Ssam } else 1570138568Ssam ni->ni_flags |= IEEE80211_NODE_ERP; 1571138568Ssam} 1572138568Ssam 1573138568Ssamvoid 1574138568Ssamieee80211_node_join(struct ieee80211com *ic, struct ieee80211_node *ni, int resp) 1575138568Ssam{ 1576138568Ssam int newassoc; 1577138568Ssam 1578138568Ssam if (ni->ni_associd == 0) { 1579138568Ssam u_int16_t aid; 1580138568Ssam 1581138568Ssam /* 1582138568Ssam * It would be good to search the bitmap 1583138568Ssam * more efficiently, but this will do for now. 1584138568Ssam */ 1585138568Ssam for (aid = 1; aid < ic->ic_max_aid; aid++) { 1586138568Ssam if (!IEEE80211_AID_ISSET(aid, 1587138568Ssam ic->ic_aid_bitmap)) 1588138568Ssam break; 1589138568Ssam } 1590138568Ssam if (aid >= ic->ic_max_aid) { 1591138568Ssam IEEE80211_SEND_MGMT(ic, ni, resp, 1592138568Ssam IEEE80211_REASON_ASSOC_TOOMANY); 1593138568Ssam ieee80211_node_leave(ic, ni); 1594138568Ssam return; 1595138568Ssam } 1596138568Ssam ni->ni_associd = aid | 0xc000; 1597138568Ssam IEEE80211_AID_SET(ni->ni_associd, ic->ic_aid_bitmap); 1598138568Ssam ic->ic_sta_assoc++; 1599138568Ssam newassoc = 1; 1600138568Ssam if (ic->ic_curmode == IEEE80211_MODE_11G) 1601138568Ssam ieee80211_node_join_11g(ic, ni); 1602138568Ssam } else 1603138568Ssam newassoc = 0; 1604138568Ssam 1605138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, 1606138568Ssam "[%s] station %s associated at aid %d\n", 1607138568Ssam ether_sprintf(ni->ni_macaddr), newassoc ? "newly" : "already", 1608138568Ssam IEEE80211_NODE_AID(ni)); 1609138568Ssam 1610138568Ssam /* give driver a chance to setup state like ni_txrate */ 1611138568Ssam if (ic->ic_newassoc) 1612138568Ssam ic->ic_newassoc(ic, ni, newassoc); 1613138568Ssam ni->ni_inact_reload = ic->ic_inact_run; 1614138568Ssam IEEE80211_SEND_MGMT(ic, ni, resp, IEEE80211_STATUS_SUCCESS); 1615138568Ssam /* tell the authenticator about new station */ 1616138568Ssam if (ic->ic_auth->ia_node_join != NULL) 1617138568Ssam ic->ic_auth->ia_node_join(ic, ni); 1618138568Ssam ieee80211_notify_node_join(ic, ni, newassoc); 1619138568Ssam} 1620138568Ssam 1621138568Ssam/* 1622138568Ssam * Handle a station leaving an 11g network. 1623138568Ssam */ 1624138568Ssamstatic void 1625138568Ssamieee80211_node_leave_11g(struct ieee80211com *ic, struct ieee80211_node *ni) 1626138568Ssam{ 1627138568Ssam 1628138568Ssam KASSERT(ic->ic_curmode == IEEE80211_MODE_11G, 1629138568Ssam ("not in 11g, curmode %x", ic->ic_curmode)); 1630138568Ssam 1631138568Ssam /* 1632138568Ssam * If a long slot station do the slot time bookkeeping. 1633138568Ssam */ 1634138568Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 1635138568Ssam KASSERT(ic->ic_longslotsta > 0, 1636138568Ssam ("bogus long slot station count %d", ic->ic_longslotsta)); 1637138568Ssam ic->ic_longslotsta--; 1638138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1639138568Ssam "[%s] long slot time station leaves, count now %d\n", 1640138568Ssam ether_sprintf(ni->ni_macaddr), ic->ic_longslotsta); 1641138568Ssam if (ic->ic_longslotsta == 0) { 1642138568Ssam /* 1643138568Ssam * Re-enable use of short slot time if supported 1644138568Ssam * and not operating in IBSS mode (per spec). 1645138568Ssam */ 1646138568Ssam if ((ic->ic_caps & IEEE80211_C_SHSLOT) && 1647138568Ssam ic->ic_opmode != IEEE80211_M_IBSS) { 1648138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1649138568Ssam "%s: re-enable use of short slot time\n", 1650138568Ssam __func__); 1651138568Ssam ieee80211_set_shortslottime(ic, 1); 1652138568Ssam } 1653138568Ssam } 1654138568Ssam } 1655138568Ssam /* 1656138568Ssam * If a non-ERP station do the protection-related bookkeeping. 1657138568Ssam */ 1658138568Ssam if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) { 1659138568Ssam KASSERT(ic->ic_nonerpsta > 0, 1660138568Ssam ("bogus non-ERP station count %d", ic->ic_nonerpsta)); 1661138568Ssam ic->ic_nonerpsta--; 1662138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1663138568Ssam "[%s] non-ERP station leaves, count now %d\n", 1664138568Ssam ether_sprintf(ni->ni_macaddr), ic->ic_nonerpsta); 1665138568Ssam if (ic->ic_nonerpsta == 0) { 1666138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1667138568Ssam "%s: disable use of protection\n", __func__); 1668138568Ssam ic->ic_flags &= ~IEEE80211_F_USEPROT; 1669138568Ssam /* XXX verify mode? */ 1670138568Ssam if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) { 1671138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1672138568Ssam "%s: re-enable use of short preamble\n", 1673138568Ssam __func__); 1674138568Ssam ic->ic_flags |= IEEE80211_F_SHPREAMBLE; 1675138568Ssam ic->ic_flags &= ~IEEE80211_F_USEBARKER; 1676138568Ssam } 1677138568Ssam } 1678138568Ssam } 1679138568Ssam} 1680138568Ssam 1681138568Ssam/* 1682138568Ssam * Handle bookkeeping for station deauthentication/disassociation 1683138568Ssam * when operating as an ap. 1684138568Ssam */ 1685138568Ssamvoid 1686138568Ssamieee80211_node_leave(struct ieee80211com *ic, struct ieee80211_node *ni) 1687138568Ssam{ 1688138568Ssam 1689138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, 1690138568Ssam "[%s] station with aid %d leaves\n", 1691138568Ssam ether_sprintf(ni->ni_macaddr), IEEE80211_NODE_AID(ni)); 1692138568Ssam 1693138568Ssam KASSERT(ic->ic_opmode == IEEE80211_M_HOSTAP || 1694138568Ssam ic->ic_opmode == IEEE80211_M_IBSS || 1695138568Ssam ic->ic_opmode == IEEE80211_M_AHDEMO, 1696138568Ssam ("unexpected operating mode %u", ic->ic_opmode)); 1697138568Ssam /* 1698138568Ssam * If node wasn't previously associated all 1699138568Ssam * we need to do is reclaim the reference. 1700138568Ssam */ 1701138568Ssam /* XXX ibss mode bypasses 11g and notification */ 1702138568Ssam if (ni->ni_associd == 0) 1703138568Ssam goto done; 1704138568Ssam /* 1705138568Ssam * Tell the authenticator the station is leaving. 1706138568Ssam * Note that we must do this before yanking the 1707138568Ssam * association id as the authenticator uses the 1708138568Ssam * associd to locate it's state block. 1709138568Ssam */ 1710138568Ssam if (ic->ic_auth->ia_node_leave != NULL) 1711138568Ssam ic->ic_auth->ia_node_leave(ic, ni); 1712138568Ssam IEEE80211_AID_CLR(ni->ni_associd, ic->ic_aid_bitmap); 1713138568Ssam ni->ni_associd = 0; 1714138568Ssam ic->ic_sta_assoc--; 1715138568Ssam 1716138568Ssam if (ic->ic_curmode == IEEE80211_MODE_11G) 1717138568Ssam ieee80211_node_leave_11g(ic, ni); 1718138568Ssam /* 1719138568Ssam * Cleanup station state. In particular clear various 1720138568Ssam * state that might otherwise be reused if the node 1721138568Ssam * is reused before the reference count goes to zero 1722138568Ssam * (and memory is reclaimed). 1723138568Ssam */ 1724138568Ssam ieee80211_sta_leave(ic, ni); 1725138568Ssamdone: 1726138568Ssam ni->ni_inact_reload = ic->ic_inact_init; /* just in case */ 1727138568Ssam ieee80211_free_node(ni); 1728138568Ssam} 1729138568Ssam 1730138568Ssamu_int8_t 1731138568Ssamieee80211_getrssi(struct ieee80211com *ic) 1732138568Ssam{ 1733138568Ssam#define NZ(x) ((x) == 0 ? 1 : (x)) 1734138568Ssam struct ieee80211_node_table *nt = ic->ic_sta; 1735138568Ssam u_int32_t rssi_samples, rssi_total; 1736138568Ssam struct ieee80211_node *ni; 1737138568Ssam 1738138568Ssam rssi_total = 0; 1739138568Ssam rssi_samples = 0; 1740138568Ssam switch (ic->ic_opmode) { 1741138568Ssam case IEEE80211_M_IBSS: /* average of all ibss neighbors */ 1742138568Ssam nt = ic->ic_sta; 1743138568Ssam if (nt == NULL) 1744138568Ssam break; 1745138568Ssam /* XXX locking */ 1746138568Ssam TAILQ_FOREACH(ni, &ic->ic_sta->nt_node, ni_list) 1747138568Ssam if (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) { 1748138568Ssam rssi_samples++; 1749138568Ssam rssi_total += ic->ic_node_getrssi(ni); 1750138568Ssam } 1751138568Ssam break; 1752138568Ssam case IEEE80211_M_AHDEMO: /* average of all neighbors */ 1753138568Ssam nt = ic->ic_sta; 1754138568Ssam if (nt == NULL) 1755138568Ssam break; 1756138568Ssam /* XXX locking */ 1757138568Ssam TAILQ_FOREACH(ni, &ic->ic_sta->nt_node, ni_list) { 1758138568Ssam rssi_samples++; 1759138568Ssam rssi_total += ic->ic_node_getrssi(ni); 1760138568Ssam } 1761138568Ssam break; 1762138568Ssam case IEEE80211_M_HOSTAP: /* average of all associated stations */ 1763138568Ssam nt = ic->ic_sta; 1764138568Ssam if (nt == NULL) 1765138568Ssam break; 1766138568Ssam /* XXX locking */ 1767138568Ssam TAILQ_FOREACH(ni, &ic->ic_sta->nt_node, ni_list) 1768138568Ssam if (IEEE80211_AID(ni->ni_associd) != 0) { 1769138568Ssam rssi_samples++; 1770138568Ssam rssi_total += ic->ic_node_getrssi(ni); 1771138568Ssam } 1772138568Ssam break; 1773138568Ssam case IEEE80211_M_MONITOR: /* XXX */ 1774138568Ssam case IEEE80211_M_STA: /* use stats from associated ap */ 1775138568Ssam default: 1776138568Ssam if (ic->ic_bss != NULL) 1777138568Ssam rssi_total = ic->ic_node_getrssi(ic->ic_bss); 1778138568Ssam rssi_samples = 1; 1779138568Ssam break; 1780138568Ssam } 1781138568Ssam return rssi_total / NZ(rssi_samples); 1782138568Ssam#undef NZ 1783138568Ssam} 1784138568Ssam 1785138568Ssam/* 1786138568Ssam * Indicate whether there are frames queued for a station in power-save mode. 1787138568Ssam */ 1788138568Ssamstatic void 1789138568Ssamieee80211_set_tim(struct ieee80211com *ic, struct ieee80211_node *ni, int set) 1790138568Ssam{ 1791138568Ssam u_int16_t aid; 1792138568Ssam 1793138568Ssam KASSERT(ic->ic_opmode == IEEE80211_M_HOSTAP || 1794138568Ssam ic->ic_opmode == IEEE80211_M_IBSS, 1795138568Ssam ("operating mode %u", ic->ic_opmode)); 1796138568Ssam 1797138568Ssam aid = IEEE80211_AID(ni->ni_associd); 1798138568Ssam KASSERT(aid < ic->ic_max_aid, 1799138568Ssam ("bogus aid %u, max %u", aid, ic->ic_max_aid)); 1800138568Ssam 1801138568Ssam IEEE80211_BEACON_LOCK(ic); 1802138568Ssam if (set != (isset(ic->ic_tim_bitmap, aid) != 0)) { 1803138568Ssam if (set) { 1804138568Ssam setbit(ic->ic_tim_bitmap, aid); 1805138568Ssam ic->ic_ps_pending++; 1806138568Ssam } else { 1807138568Ssam clrbit(ic->ic_tim_bitmap, aid); 1808138568Ssam ic->ic_ps_pending--; 1809138568Ssam } 1810138568Ssam ic->ic_flags |= IEEE80211_F_TIMUPDATE; 1811138568Ssam } 1812138568Ssam IEEE80211_BEACON_UNLOCK(ic); 1813138568Ssam} 1814138568Ssam 1815138568Ssam/* 1816138568Ssam * Node table support. 1817138568Ssam */ 1818138568Ssam 1819138568Ssamstatic void 1820138568Ssamieee80211_node_table_init(struct ieee80211com *ic, 1821138568Ssam struct ieee80211_node_table *nt, 1822138568Ssam const char *name, int inact, 1823138568Ssam void (*timeout)(struct ieee80211_node_table *)) 1824138568Ssam{ 1825138568Ssam 1826138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1827138568Ssam "%s %s table, inact %u\n", __func__, name, inact); 1828138568Ssam 1829138568Ssam nt->nt_ic = ic; 1830138568Ssam /* XXX need unit */ 1831138568Ssam IEEE80211_NODE_LOCK_INIT(nt, ic->ic_ifp->if_xname); 1832138568Ssam IEEE80211_SCAN_LOCK_INIT(nt, ic->ic_ifp->if_xname); 1833138568Ssam TAILQ_INIT(&nt->nt_node); 1834138568Ssam nt->nt_name = name; 1835138568Ssam nt->nt_scangen = 1; 1836138568Ssam nt->nt_inact_init = inact; 1837138568Ssam nt->nt_timeout = timeout; 1838138568Ssam} 1839138568Ssam 1840138568Ssamstatic struct ieee80211_node_table * 1841138568Ssamieee80211_node_table_alloc(struct ieee80211com *ic, 1842138568Ssam const char *name, int inact, 1843138568Ssam void (*timeout)(struct ieee80211_node_table *)) 1844138568Ssam{ 1845138568Ssam struct ieee80211_node_table *nt; 1846138568Ssam 1847138568Ssam MALLOC(nt, struct ieee80211_node_table *, 1848138568Ssam sizeof(struct ieee80211_node_table), 1849138568Ssam M_DEVBUF, M_NOWAIT | M_ZERO); 1850138568Ssam if (nt == NULL) { 1851138568Ssam printf("%s: no memory node table!\n", __func__); 1852138568Ssam return NULL; 1853138568Ssam } 1854138568Ssam ieee80211_node_table_init(ic, nt, name, inact, timeout); 1855138568Ssam return nt; 1856138568Ssam} 1857138568Ssam 1858138568Ssamvoid 1859138568Ssamieee80211_node_table_reset(struct ieee80211_node_table *nt) 1860138568Ssam{ 1861138568Ssam 1862138568Ssam IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE, 1863138568Ssam "%s %s table\n", __func__, nt->nt_name); 1864138568Ssam 1865138568Ssam IEEE80211_NODE_LOCK(nt); 1866138568Ssam nt->nt_inact_timer = 0; 1867138568Ssam ieee80211_free_allnodes_locked(nt); 1868138568Ssam IEEE80211_NODE_UNLOCK(nt); 1869138568Ssam} 1870138568Ssam 1871138568Ssamstatic void 1872138568Ssamieee80211_node_table_cleanup(struct ieee80211_node_table *nt) 1873138568Ssam{ 1874138568Ssam 1875138568Ssam IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE, 1876138568Ssam "%s %s table\n", __func__, nt->nt_name); 1877138568Ssam 1878138568Ssam ieee80211_free_allnodes_locked(nt); 1879138568Ssam IEEE80211_SCAN_LOCK_DESTROY(nt); 1880138568Ssam IEEE80211_NODE_LOCK_DESTROY(nt); 1881138568Ssam} 1882138568Ssam 1883138568Ssam/* 1884138568Ssam * NB: public for use in ieee80211_proto.c 1885138568Ssam */ 1886138568Ssamvoid 1887138568Ssamieee80211_node_table_free(struct ieee80211_node_table *nt) 1888138568Ssam{ 1889138568Ssam 1890138568Ssam IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE, 1891138568Ssam "%s %s table\n", __func__, nt->nt_name); 1892138568Ssam 1893138568Ssam IEEE80211_NODE_LOCK(nt); 1894138568Ssam nt->nt_inact_timer = 0; 1895138568Ssam ieee80211_node_table_cleanup(nt); 1896138568Ssam FREE(nt, M_DEVBUF); 1897138568Ssam} 1898