ieee80211_node.c revision 158121
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 158121 2006-04-28 19:06:15Z sam $"); 35116742Ssam 36116742Ssam#include <sys/param.h> 37116742Ssam#include <sys/systm.h> 38116742Ssam#include <sys/mbuf.h> 39116742Ssam#include <sys/malloc.h> 40116742Ssam#include <sys/kernel.h> 41138568Ssam 42116742Ssam#include <sys/socket.h> 43116742Ssam 44116742Ssam#include <net/if.h> 45116742Ssam#include <net/if_media.h> 46116742Ssam#include <net/ethernet.h> 47116742Ssam 48116742Ssam#include <net80211/ieee80211_var.h> 49116742Ssam 50116742Ssam#include <net/bpf.h> 51116742Ssam 52147221Ssam/* 53147221Ssam * Association id's are managed with a bit vector. 54147221Ssam */ 55147221Ssam#define IEEE80211_AID_SET(b, w) \ 56147221Ssam ((w)[IEEE80211_AID(b) / 32] |= (1 << (IEEE80211_AID(b) % 32))) 57147221Ssam#define IEEE80211_AID_CLR(b, w) \ 58147221Ssam ((w)[IEEE80211_AID(b) / 32] &= ~(1 << (IEEE80211_AID(b) % 32))) 59147221Ssam#define IEEE80211_AID_ISSET(b, w) \ 60147221Ssam ((w)[IEEE80211_AID(b) / 32] & (1 << (IEEE80211_AID(b) % 32))) 61147221Ssam 62138568Ssamstatic struct ieee80211_node *node_alloc(struct ieee80211_node_table *); 63138568Ssamstatic void node_cleanup(struct ieee80211_node *); 64138568Ssamstatic void node_free(struct ieee80211_node *); 65138568Ssamstatic u_int8_t node_getrssi(const struct ieee80211_node *); 66116742Ssam 67138568Ssamstatic void ieee80211_setup_node(struct ieee80211_node_table *, 68138568Ssam struct ieee80211_node *, const u_int8_t *); 69138568Ssamstatic void _ieee80211_free_node(struct ieee80211_node *); 70138568Ssamstatic void ieee80211_free_allnodes(struct ieee80211_node_table *); 71120104Ssam 72138568Ssamstatic void ieee80211_timeout_scan_candidates(struct ieee80211_node_table *); 73138568Ssamstatic void ieee80211_timeout_stations(struct ieee80211_node_table *); 74116742Ssam 75148304Ssamstatic void ieee80211_set_tim(struct ieee80211_node *, int set); 76138568Ssam 77138568Ssamstatic void ieee80211_node_table_init(struct ieee80211com *ic, 78148863Ssam struct ieee80211_node_table *nt, const char *name, 79148863Ssam int inact, int keyixmax, 80138568Ssam void (*timeout)(struct ieee80211_node_table *)); 81138568Ssamstatic void ieee80211_node_table_cleanup(struct ieee80211_node_table *nt); 82138568Ssam 83127876SsamMALLOC_DEFINE(M_80211_NODE, "80211node", "802.11 node state"); 84120481Ssam 85116742Ssamvoid 86138568Ssamieee80211_node_attach(struct ieee80211com *ic) 87116742Ssam{ 88116742Ssam 89138568Ssam ic->ic_node_alloc = node_alloc; 90138568Ssam ic->ic_node_free = node_free; 91138568Ssam ic->ic_node_cleanup = node_cleanup; 92138568Ssam ic->ic_node_getrssi = node_getrssi; 93138568Ssam 94138568Ssam /* default station inactivity timer setings */ 95138568Ssam ic->ic_inact_init = IEEE80211_INACT_INIT; 96138568Ssam ic->ic_inact_auth = IEEE80211_INACT_AUTH; 97138568Ssam ic->ic_inact_run = IEEE80211_INACT_RUN; 98138568Ssam ic->ic_inact_probe = IEEE80211_INACT_PROBE; 99138568Ssam 100148863Ssam /* NB: driver should override */ 101148863Ssam ic->ic_max_aid = IEEE80211_AID_DEF; 102148863Ssam ic->ic_set_tim = ieee80211_set_tim; 103148863Ssam} 104148863Ssam 105148863Ssamvoid 106148863Ssamieee80211_node_lateattach(struct ieee80211com *ic) 107148863Ssam{ 108148863Ssam struct ieee80211_rsnparms *rsn; 109148863Ssam 110148863Ssam if (ic->ic_max_aid > IEEE80211_AID_MAX) 111138568Ssam ic->ic_max_aid = IEEE80211_AID_MAX; 112138568Ssam MALLOC(ic->ic_aid_bitmap, u_int32_t *, 113138568Ssam howmany(ic->ic_max_aid, 32) * sizeof(u_int32_t), 114138568Ssam M_DEVBUF, M_NOWAIT | M_ZERO); 115138568Ssam if (ic->ic_aid_bitmap == NULL) { 116138568Ssam /* XXX no way to recover */ 117138568Ssam printf("%s: no memory for AID bitmap!\n", __func__); 118138568Ssam ic->ic_max_aid = 0; 119138568Ssam } 120138568Ssam 121138568Ssam /* XXX defer until using hostap/ibss mode */ 122138568Ssam ic->ic_tim_len = howmany(ic->ic_max_aid, 8) * sizeof(u_int8_t); 123138568Ssam MALLOC(ic->ic_tim_bitmap, u_int8_t *, ic->ic_tim_len, 124138568Ssam M_DEVBUF, M_NOWAIT | M_ZERO); 125138568Ssam if (ic->ic_tim_bitmap == NULL) { 126138568Ssam /* XXX no way to recover */ 127138568Ssam printf("%s: no memory for TIM bitmap!\n", __func__); 128138568Ssam } 129118887Ssam 130148863Ssam ieee80211_node_table_init(ic, &ic->ic_sta, "station", 131148863Ssam IEEE80211_INACT_INIT, ic->ic_crypto.cs_max_keyix, 132148863Ssam ieee80211_timeout_stations); 133148863Ssam ieee80211_node_table_init(ic, &ic->ic_scan, "scan", 134148863Ssam IEEE80211_INACT_SCAN, 0, 135148863Ssam ieee80211_timeout_scan_candidates); 136118887Ssam 137148863Ssam ieee80211_reset_bss(ic); 138138568Ssam /* 139138568Ssam * Setup "global settings" in the bss node so that 140138568Ssam * each new station automatically inherits them. 141138568Ssam */ 142148863Ssam rsn = &ic->ic_bss->ni_rsn; 143138568Ssam /* WEP, TKIP, and AES-CCM are always supported */ 144138568Ssam rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_WEP; 145138568Ssam rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_TKIP; 146138568Ssam rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_AES_CCM; 147138568Ssam if (ic->ic_caps & IEEE80211_C_AES) 148138568Ssam rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_AES_OCB; 149138568Ssam if (ic->ic_caps & IEEE80211_C_CKIP) 150138568Ssam rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_CKIP; 151138568Ssam /* 152138568Ssam * Default unicast cipher to WEP for 802.1x use. If 153138568Ssam * WPA is enabled the management code will set these 154138568Ssam * values to reflect. 155138568Ssam */ 156138568Ssam rsn->rsn_ucastcipher = IEEE80211_CIPHER_WEP; 157138568Ssam rsn->rsn_ucastkeylen = 104 / NBBY; 158138568Ssam /* 159138568Ssam * WPA says the multicast cipher is the lowest unicast 160138568Ssam * cipher supported. But we skip WEP which would 161138568Ssam * otherwise be used based on this criteria. 162138568Ssam */ 163138568Ssam rsn->rsn_mcastcipher = IEEE80211_CIPHER_TKIP; 164138568Ssam rsn->rsn_mcastkeylen = 128 / NBBY; 165138568Ssam 166138568Ssam /* 167138568Ssam * We support both WPA-PSK and 802.1x; the one used 168138568Ssam * is determined by the authentication mode and the 169138568Ssam * setting of the PSK state. 170138568Ssam */ 171138568Ssam rsn->rsn_keymgmtset = WPA_ASE_8021X_UNSPEC | WPA_ASE_8021X_PSK; 172138568Ssam rsn->rsn_keymgmt = WPA_ASE_8021X_PSK; 173138568Ssam 174148863Ssam ic->ic_auth = ieee80211_authenticator_get(ic->ic_bss->ni_authmode); 175116742Ssam} 176116742Ssam 177116742Ssamvoid 178138568Ssamieee80211_node_detach(struct ieee80211com *ic) 179116742Ssam{ 180116742Ssam 181138568Ssam if (ic->ic_bss != NULL) { 182138568Ssam ieee80211_free_node(ic->ic_bss); 183138568Ssam ic->ic_bss = NULL; 184138568Ssam } 185138568Ssam ieee80211_node_table_cleanup(&ic->ic_scan); 186140753Ssam ieee80211_node_table_cleanup(&ic->ic_sta); 187138568Ssam if (ic->ic_aid_bitmap != NULL) { 188138568Ssam FREE(ic->ic_aid_bitmap, M_DEVBUF); 189138568Ssam ic->ic_aid_bitmap = NULL; 190138568Ssam } 191138568Ssam if (ic->ic_tim_bitmap != NULL) { 192138568Ssam FREE(ic->ic_tim_bitmap, M_DEVBUF); 193138568Ssam ic->ic_tim_bitmap = NULL; 194138568Ssam } 195116742Ssam} 196116742Ssam 197138568Ssam/* 198138568Ssam * Port authorize/unauthorize interfaces for use by an authenticator. 199138568Ssam */ 200138568Ssam 201138568Ssamvoid 202148302Ssamieee80211_node_authorize(struct ieee80211_node *ni) 203138568Ssam{ 204148302Ssam struct ieee80211com *ic = ni->ni_ic; 205148302Ssam 206138568Ssam ni->ni_flags |= IEEE80211_NODE_AUTH; 207139528Ssam ni->ni_inact_reload = ic->ic_inact_run; 208138568Ssam} 209138568Ssam 210138568Ssamvoid 211148302Ssamieee80211_node_unauthorize(struct ieee80211_node *ni) 212138568Ssam{ 213138568Ssam ni->ni_flags &= ~IEEE80211_NODE_AUTH; 214138568Ssam} 215138568Ssam 216116742Ssam/* 217138568Ssam * Set/change the channel. The rate set is also updated as 218138568Ssam * to insure a consistent view by drivers. 219138568Ssam */ 220153351Ssamstatic void 221138568Ssamieee80211_set_chan(struct ieee80211com *ic, 222138568Ssam struct ieee80211_node *ni, struct ieee80211_channel *chan) 223138568Ssam{ 224153351Ssam if (chan == IEEE80211_CHAN_ANYC) /* XXX while scanning */ 225153351Ssam chan = ic->ic_curchan; 226138568Ssam ni->ni_chan = chan; 227138568Ssam ni->ni_rates = ic->ic_sup_rates[ieee80211_chan2mode(ic, chan)]; 228138568Ssam} 229138568Ssam 230138568Ssam/* 231116742Ssam * AP scanning support. 232116742Ssam */ 233116742Ssam 234138568Ssam#ifdef IEEE80211_DEBUG 235138568Ssamstatic void 236138568Ssamdump_chanlist(const u_char chans[]) 237138568Ssam{ 238138568Ssam const char *sep; 239138568Ssam int i; 240138568Ssam 241138568Ssam sep = " "; 242138568Ssam for (i = 0; i < IEEE80211_CHAN_MAX; i++) 243138568Ssam if (isset(chans, i)) { 244138568Ssam printf("%s%u", sep, i); 245138568Ssam sep = ", "; 246138568Ssam } 247138568Ssam} 248138568Ssam#endif /* IEEE80211_DEBUG */ 249138568Ssam 250116742Ssam/* 251138568Ssam * Initialize the channel set to scan based on the 252116742Ssam * of available channels and the current PHY mode. 253116742Ssam */ 254117811Ssamstatic void 255138568Ssamieee80211_reset_scan(struct ieee80211com *ic) 256116742Ssam{ 257116742Ssam 258138568Ssam /* XXX ic_des_chan should be handled with ic_chan_active */ 259138568Ssam if (ic->ic_des_chan != IEEE80211_CHAN_ANYC) { 260138568Ssam memset(ic->ic_chan_scan, 0, sizeof(ic->ic_chan_scan)); 261138568Ssam setbit(ic->ic_chan_scan, 262138568Ssam ieee80211_chan2ieee(ic, ic->ic_des_chan)); 263138568Ssam } else 264138568Ssam memcpy(ic->ic_chan_scan, ic->ic_chan_active, 265138568Ssam sizeof(ic->ic_chan_active)); 266138568Ssam#ifdef IEEE80211_DEBUG 267138568Ssam if (ieee80211_msg_scan(ic)) { 268138568Ssam printf("%s: scan set:", __func__); 269138568Ssam dump_chanlist(ic->ic_chan_scan); 270138568Ssam printf(" start chan %u\n", 271148936Ssam ieee80211_chan2ieee(ic, ic->ic_curchan)); 272138568Ssam } 273138568Ssam#endif /* IEEE80211_DEBUG */ 274116742Ssam} 275116742Ssam 276116742Ssam/* 277116742Ssam * Begin an active scan. 278116742Ssam */ 279116742Ssamvoid 280138568Ssamieee80211_begin_scan(struct ieee80211com *ic, int reset) 281116742Ssam{ 282116742Ssam 283138568Ssam ic->ic_scan.nt_scangen++; 284117811Ssam /* 285117811Ssam * In all but hostap mode scanning starts off in 286117811Ssam * an active mode before switching to passive. 287117811Ssam */ 288121180Ssam if (ic->ic_opmode != IEEE80211_M_HOSTAP) { 289117811Ssam ic->ic_flags |= IEEE80211_F_ASCAN; 290121180Ssam ic->ic_stats.is_scan_active++; 291121180Ssam } else 292121180Ssam ic->ic_stats.is_scan_passive++; 293139520Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, 294139520Ssam "begin %s scan in %s mode, scangen %u\n", 295138568Ssam (ic->ic_flags & IEEE80211_F_ASCAN) ? "active" : "passive", 296139520Ssam ieee80211_phymode_name[ic->ic_curmode], ic->ic_scan.nt_scangen); 297116742Ssam /* 298138568Ssam * Clear scan state and flush any previously seen AP's. 299116742Ssam */ 300138568Ssam ieee80211_reset_scan(ic); 301138568Ssam if (reset) 302138568Ssam ieee80211_free_allnodes(&ic->ic_scan); 303116742Ssam 304138568Ssam ic->ic_flags |= IEEE80211_F_SCAN; 305138568Ssam 306117811Ssam /* Scan the next channel. */ 307138568Ssam ieee80211_next_scan(ic); 308116742Ssam} 309116742Ssam 310116742Ssam/* 311116742Ssam * Switch to the next channel marked for scanning. 312116742Ssam */ 313138568Ssamint 314138568Ssamieee80211_next_scan(struct ieee80211com *ic) 315116742Ssam{ 316116742Ssam struct ieee80211_channel *chan; 317116742Ssam 318138568Ssam /* 319138568Ssam * Insure any previous mgt frame timeouts don't fire. 320138568Ssam * This assumes the driver does the right thing in 321138568Ssam * flushing anything queued in the driver and below. 322138568Ssam */ 323138568Ssam ic->ic_mgt_timer = 0; 324156358Ssam ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN; 325138568Ssam 326148936Ssam chan = ic->ic_curchan; 327138568Ssam do { 328116742Ssam if (++chan > &ic->ic_channels[IEEE80211_CHAN_MAX]) 329116742Ssam chan = &ic->ic_channels[0]; 330116742Ssam if (isset(ic->ic_chan_scan, ieee80211_chan2ieee(ic, chan))) { 331138568Ssam clrbit(ic->ic_chan_scan, ieee80211_chan2ieee(ic, chan)); 332138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, 333138568Ssam "%s: chan %d->%d\n", __func__, 334148936Ssam ieee80211_chan2ieee(ic, ic->ic_curchan), 335138568Ssam ieee80211_chan2ieee(ic, chan)); 336148936Ssam ic->ic_curchan = chan; 337148936Ssam /* 338148936Ssam * XXX drivers should do this as needed, 339148936Ssam * XXX for now maintain compatibility 340148936Ssam */ 341148936Ssam ic->ic_bss->ni_rates = 342148936Ssam ic->ic_sup_rates[ieee80211_chan2mode(ic, chan)]; 343138568Ssam ieee80211_new_state(ic, IEEE80211_S_SCAN, -1); 344138568Ssam return 1; 345116742Ssam } 346148936Ssam } while (chan != ic->ic_curchan); 347138568Ssam ieee80211_end_scan(ic); 348138568Ssam return 0; 349116742Ssam} 350116742Ssam 351156358Ssam/* 352156358Ssam * Probe the curent channel, if allowed, while scanning. 353156358Ssam * If the channel is not marked passive-only then send 354156358Ssam * a probe request immediately. Otherwise mark state and 355156358Ssam * listen for beacons on the channel; if we receive something 356156358Ssam * then we'll transmit a probe request. 357156358Ssam */ 358156358Ssamvoid 359156358Ssamieee80211_probe_curchan(struct ieee80211com *ic, int force) 360156358Ssam{ 361156358Ssam struct ifnet *ifp = ic->ic_ifp; 362156358Ssam 363156358Ssam if ((ic->ic_curchan->ic_flags & IEEE80211_CHAN_PASSIVE) == 0 || force) { 364156358Ssam /* 365156358Ssam * XXX send both broadcast+directed probe request 366156358Ssam */ 367156358Ssam ieee80211_send_probereq(ic->ic_bss, 368156358Ssam ic->ic_myaddr, ifp->if_broadcastaddr, 369156358Ssam ifp->if_broadcastaddr, 370156358Ssam ic->ic_des_essid, ic->ic_des_esslen, 371156358Ssam ic->ic_opt_ie, ic->ic_opt_ie_len); 372156358Ssam } else 373156358Ssam ic->ic_flags_ext |= IEEE80211_FEXT_PROBECHAN; 374156358Ssam} 375156358Ssam 376141658Ssamstatic __inline void 377141658Ssamcopy_bss(struct ieee80211_node *nbss, const struct ieee80211_node *obss) 378141658Ssam{ 379141658Ssam /* propagate useful state */ 380141658Ssam nbss->ni_authmode = obss->ni_authmode; 381141658Ssam nbss->ni_txpower = obss->ni_txpower; 382141658Ssam nbss->ni_vlan = obss->ni_vlan; 383141658Ssam nbss->ni_rsn = obss->ni_rsn; 384141658Ssam /* XXX statistics? */ 385141658Ssam} 386141658Ssam 387116742Ssamvoid 388116742Ssamieee80211_create_ibss(struct ieee80211com* ic, struct ieee80211_channel *chan) 389116742Ssam{ 390140753Ssam struct ieee80211_node_table *nt; 391116742Ssam struct ieee80211_node *ni; 392116742Ssam 393138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, 394138568Ssam "%s: creating ibss\n", __func__); 395138568Ssam 396138568Ssam /* 397138568Ssam * Create the station/neighbor table. Note that for adhoc 398138568Ssam * mode we make the initial inactivity timer longer since 399138568Ssam * we create nodes only through discovery and they typically 400138568Ssam * are long-lived associations. 401138568Ssam */ 402140753Ssam nt = &ic->ic_sta; 403140753Ssam IEEE80211_NODE_LOCK(nt); 404140753Ssam if (ic->ic_opmode == IEEE80211_M_HOSTAP) { 405140753Ssam nt->nt_name = "station"; 406140753Ssam nt->nt_inact_init = ic->ic_inact_init; 407140753Ssam } else { 408140753Ssam nt->nt_name = "neighbor"; 409140753Ssam nt->nt_inact_init = ic->ic_inact_run; 410140753Ssam } 411140753Ssam IEEE80211_NODE_UNLOCK(nt); 412140753Ssam 413148863Ssam ni = ieee80211_alloc_node(&ic->ic_sta, ic->ic_myaddr); 414140753Ssam if (ni == NULL) { 415140753Ssam /* XXX recovery? */ 416138568Ssam return; 417138568Ssam } 418116742Ssam IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_myaddr); 419116742Ssam ni->ni_esslen = ic->ic_des_esslen; 420116742Ssam memcpy(ni->ni_essid, ic->ic_des_essid, ni->ni_esslen); 421141658Ssam copy_bss(ni, ic->ic_bss); 422148843Ssam ni->ni_intval = ic->ic_bintval; 423138568Ssam if (ic->ic_flags & IEEE80211_F_PRIVACY) 424116742Ssam ni->ni_capinfo |= IEEE80211_CAPINFO_PRIVACY; 425116742Ssam if (ic->ic_phytype == IEEE80211_T_FH) { 426116742Ssam ni->ni_fhdwell = 200; /* XXX */ 427116742Ssam ni->ni_fhindex = 1; 428116742Ssam } 429138568Ssam if (ic->ic_opmode == IEEE80211_M_IBSS) { 430138568Ssam ic->ic_flags |= IEEE80211_F_SIBSS; 431138568Ssam ni->ni_capinfo |= IEEE80211_CAPINFO_IBSS; /* XXX */ 432143300Ssam if (ic->ic_flags & IEEE80211_F_DESBSSID) 433143300Ssam IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_des_bssid); 434143300Ssam else 435143300Ssam ni->ni_bssid[0] |= 0x02; /* local bit for IBSS */ 436153403Ssam } else if (ic->ic_opmode == IEEE80211_M_AHDEMO) { 437153403Ssam if (ic->ic_flags & IEEE80211_F_DESBSSID) 438153403Ssam IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_des_bssid); 439153403Ssam else 440153403Ssam memset(ni->ni_bssid, 0, IEEE80211_ADDR_LEN); 441138568Ssam } 442138568Ssam /* 443138568Ssam * Fix the channel and related attributes. 444138568Ssam */ 445138568Ssam ieee80211_set_chan(ic, ni, chan); 446148936Ssam ic->ic_curchan = chan; 447138568Ssam ic->ic_curmode = ieee80211_chan2mode(ic, chan); 448138568Ssam /* 449138568Ssam * Do mode-specific rate setup. 450138568Ssam */ 451138568Ssam if (ic->ic_curmode == IEEE80211_MODE_11G) { 452138568Ssam /* 453138568Ssam * Use a mixed 11b/11g rate set. 454138568Ssam */ 455138568Ssam ieee80211_set11gbasicrates(&ni->ni_rates, IEEE80211_MODE_11G); 456138568Ssam } else if (ic->ic_curmode == IEEE80211_MODE_11B) { 457138568Ssam /* 458138568Ssam * Force pure 11b rate set. 459138568Ssam */ 460138568Ssam ieee80211_set11gbasicrates(&ni->ni_rates, IEEE80211_MODE_11B); 461138568Ssam } 462138568Ssam 463140753Ssam (void) ieee80211_sta_join(ic, ieee80211_ref_node(ni)); 464116742Ssam} 465116742Ssam 466138568Ssamvoid 467138568Ssamieee80211_reset_bss(struct ieee80211com *ic) 468138568Ssam{ 469138568Ssam struct ieee80211_node *ni, *obss; 470138568Ssam 471138568Ssam ieee80211_node_table_reset(&ic->ic_scan); 472140753Ssam ieee80211_node_table_reset(&ic->ic_sta); 473140753Ssam 474138568Ssam ni = ieee80211_alloc_node(&ic->ic_scan, ic->ic_myaddr); 475138568Ssam KASSERT(ni != NULL, ("unable to setup inital BSS node")); 476138568Ssam obss = ic->ic_bss; 477138568Ssam ic->ic_bss = ieee80211_ref_node(ni); 478141658Ssam if (obss != NULL) { 479141658Ssam copy_bss(ni, obss); 480148843Ssam ni->ni_intval = ic->ic_bintval; 481138568Ssam ieee80211_free_node(obss); 482141658Ssam } 483138568Ssam} 484138568Ssam 485148432Ssam/* XXX tunable */ 486148432Ssam#define STA_FAILS_MAX 2 /* assoc failures before ignored */ 487148432Ssam 488127767Ssamstatic int 489138568Ssamieee80211_match_bss(struct ieee80211com *ic, struct ieee80211_node *ni) 490127767Ssam{ 491127767Ssam u_int8_t rate; 492127767Ssam int fail; 493127767Ssam 494127767Ssam fail = 0; 495127767Ssam if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 496127767Ssam fail |= 0x01; 497127767Ssam if (ic->ic_des_chan != IEEE80211_CHAN_ANYC && 498127767Ssam ni->ni_chan != ic->ic_des_chan) 499127767Ssam fail |= 0x01; 500127767Ssam if (ic->ic_opmode == IEEE80211_M_IBSS) { 501127767Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 502127767Ssam fail |= 0x02; 503127767Ssam } else { 504127767Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 505127767Ssam fail |= 0x02; 506127767Ssam } 507138568Ssam if (ic->ic_flags & IEEE80211_F_PRIVACY) { 508127767Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 509127767Ssam fail |= 0x04; 510127767Ssam } else { 511127767Ssam /* XXX does this mean privacy is supported or required? */ 512127767Ssam if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 513127767Ssam fail |= 0x04; 514127767Ssam } 515148299Ssam rate = ieee80211_fix_rate(ni, IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 516127767Ssam if (rate & IEEE80211_RATE_BASIC) 517127767Ssam fail |= 0x08; 518127767Ssam if (ic->ic_des_esslen != 0 && 519127767Ssam (ni->ni_esslen != ic->ic_des_esslen || 520127767Ssam memcmp(ni->ni_essid, ic->ic_des_essid, ic->ic_des_esslen) != 0)) 521127767Ssam fail |= 0x10; 522127767Ssam if ((ic->ic_flags & IEEE80211_F_DESBSSID) && 523127767Ssam !IEEE80211_ADDR_EQ(ic->ic_des_bssid, ni->ni_bssid)) 524127767Ssam fail |= 0x20; 525148432Ssam if (ni->ni_fails >= STA_FAILS_MAX) 526148432Ssam fail |= 0x40; 527127767Ssam#ifdef IEEE80211_DEBUG 528138568Ssam if (ieee80211_msg_scan(ic)) { 529148432Ssam printf(" %c %s", 530148432Ssam fail & 0x40 ? '=' : fail & 0x80 ? '^' : fail ? '-' : '+', 531127767Ssam ether_sprintf(ni->ni_macaddr)); 532127767Ssam printf(" %s%c", ether_sprintf(ni->ni_bssid), 533127767Ssam fail & 0x20 ? '!' : ' '); 534127767Ssam printf(" %3d%c", ieee80211_chan2ieee(ic, ni->ni_chan), 535127767Ssam fail & 0x01 ? '!' : ' '); 536127767Ssam printf(" %+4d", ni->ni_rssi); 537127767Ssam printf(" %2dM%c", (rate & IEEE80211_RATE_VAL) / 2, 538127767Ssam fail & 0x08 ? '!' : ' '); 539127767Ssam printf(" %4s%c", 540127767Ssam (ni->ni_capinfo & IEEE80211_CAPINFO_ESS) ? "ess" : 541127767Ssam (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) ? "ibss" : 542127767Ssam "????", 543127767Ssam fail & 0x02 ? '!' : ' '); 544127767Ssam printf(" %3s%c ", 545127767Ssam (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) ? 546127767Ssam "wep" : "no", 547127767Ssam fail & 0x04 ? '!' : ' '); 548127767Ssam ieee80211_print_essid(ni->ni_essid, ni->ni_esslen); 549127767Ssam printf("%s\n", fail & 0x10 ? "!" : ""); 550127767Ssam } 551127767Ssam#endif 552127767Ssam return fail; 553127767Ssam} 554127767Ssam 555138568Ssamstatic __inline u_int8_t 556138568Ssammaxrate(const struct ieee80211_node *ni) 557138568Ssam{ 558138568Ssam const struct ieee80211_rateset *rs = &ni->ni_rates; 559138568Ssam /* NB: assumes rate set is sorted (happens on frame receive) */ 560138568Ssam return rs->rs_rates[rs->rs_nrates-1] & IEEE80211_RATE_VAL; 561138568Ssam} 562138568Ssam 563116742Ssam/* 564138568Ssam * Compare the capabilities of two nodes and decide which is 565138568Ssam * more desirable (return >0 if a is considered better). Note 566138568Ssam * that we assume compatibility/usability has already been checked 567138568Ssam * so we don't need to (e.g. validate whether privacy is supported). 568138568Ssam * Used to select the best scan candidate for association in a BSS. 569138568Ssam */ 570138568Ssamstatic int 571138568Ssamieee80211_node_compare(struct ieee80211com *ic, 572138568Ssam const struct ieee80211_node *a, 573138568Ssam const struct ieee80211_node *b) 574138568Ssam{ 575138568Ssam u_int8_t maxa, maxb; 576138568Ssam u_int8_t rssia, rssib; 577148432Ssam int weight; 578138568Ssam 579138568Ssam /* privacy support preferred */ 580138568Ssam if ((a->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) && 581138568Ssam (b->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 582138568Ssam return 1; 583138568Ssam if ((a->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0 && 584138568Ssam (b->ni_capinfo & IEEE80211_CAPINFO_PRIVACY)) 585138568Ssam return -1; 586138568Ssam 587148432Ssam /* compare count of previous failures */ 588148432Ssam weight = b->ni_fails - a->ni_fails; 589148432Ssam if (abs(weight) > 1) 590148432Ssam return weight; 591148432Ssam 592138568Ssam rssia = ic->ic_node_getrssi(a); 593138568Ssam rssib = ic->ic_node_getrssi(b); 594139543Ssam if (abs(rssib - rssia) < 5) { 595139543Ssam /* best/max rate preferred if signal level close enough XXX */ 596139543Ssam maxa = maxrate(a); 597139543Ssam maxb = maxrate(b); 598139543Ssam if (maxa != maxb) 599139543Ssam return maxa - maxb; 600139543Ssam /* XXX use freq for channel preference */ 601139543Ssam /* for now just prefer 5Ghz band to all other bands */ 602139543Ssam if (IEEE80211_IS_CHAN_5GHZ(a->ni_chan) && 603139543Ssam !IEEE80211_IS_CHAN_5GHZ(b->ni_chan)) 604139543Ssam return 1; 605139543Ssam if (!IEEE80211_IS_CHAN_5GHZ(a->ni_chan) && 606139543Ssam IEEE80211_IS_CHAN_5GHZ(b->ni_chan)) 607139543Ssam return -1; 608139543Ssam } 609138568Ssam /* all things being equal, use signal level */ 610138568Ssam return rssia - rssib; 611138568Ssam} 612138568Ssam 613138568Ssam/* 614140441Ssam * Mark an ongoing scan stopped. 615140441Ssam */ 616140441Ssamvoid 617140441Ssamieee80211_cancel_scan(struct ieee80211com *ic) 618140441Ssam{ 619140441Ssam 620140441Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, "%s: end %s scan\n", 621140441Ssam __func__, 622140441Ssam (ic->ic_flags & IEEE80211_F_ASCAN) ? "active" : "passive"); 623140441Ssam 624140441Ssam ic->ic_flags &= ~(IEEE80211_F_SCAN | IEEE80211_F_ASCAN); 625156358Ssam ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN; 626140441Ssam} 627140441Ssam 628140441Ssam/* 629116742Ssam * Complete a scan of potential channels. 630116742Ssam */ 631116742Ssamvoid 632138568Ssamieee80211_end_scan(struct ieee80211com *ic) 633116742Ssam{ 634140448Ssam struct ieee80211_node_table *nt = &ic->ic_scan; 635140448Ssam struct ieee80211_node *ni, *selbs; 636116742Ssam 637140441Ssam ieee80211_cancel_scan(ic); 638140441Ssam ieee80211_notify_scan_done(ic); 639116742Ssam 640116742Ssam if (ic->ic_opmode == IEEE80211_M_HOSTAP) { 641138568Ssam u_int8_t maxrssi[IEEE80211_CHAN_MAX]; /* XXX off stack? */ 642138568Ssam int i, bestchan; 643138568Ssam u_int8_t rssi; 644138568Ssam 645116742Ssam /* 646116742Ssam * The passive scan to look for existing AP's completed, 647116742Ssam * select a channel to camp on. Identify the channels 648116742Ssam * that already have one or more AP's and try to locate 649140753Ssam * an unoccupied one. If that fails, pick a channel that 650138568Ssam * looks to be quietest. 651116742Ssam */ 652138568Ssam memset(maxrssi, 0, sizeof(maxrssi)); 653140448Ssam IEEE80211_NODE_LOCK(nt); 654140448Ssam TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 655138568Ssam rssi = ic->ic_node_getrssi(ni); 656138568Ssam i = ieee80211_chan2ieee(ic, ni->ni_chan); 657138568Ssam if (rssi > maxrssi[i]) 658138568Ssam maxrssi[i] = rssi; 659116742Ssam } 660140448Ssam IEEE80211_NODE_UNLOCK(nt); 661138568Ssam /* XXX select channel more intelligently */ 662138568Ssam bestchan = -1; 663116742Ssam for (i = 0; i < IEEE80211_CHAN_MAX; i++) 664138568Ssam if (isset(ic->ic_chan_active, i)) { 665138568Ssam /* 666138568Ssam * If the channel is unoccupied the max rssi 667138568Ssam * should be zero; just take it. Otherwise 668138568Ssam * track the channel with the lowest rssi and 669138568Ssam * use that when all channels appear occupied. 670138568Ssam */ 671138568Ssam if (maxrssi[i] == 0) { 672138568Ssam bestchan = i; 673116742Ssam break; 674138568Ssam } 675143715Ssam if (bestchan == -1 || 676143715Ssam maxrssi[i] < maxrssi[bestchan]) 677138568Ssam bestchan = i; 678138568Ssam } 679138568Ssam if (bestchan != -1) { 680138568Ssam ieee80211_create_ibss(ic, &ic->ic_channels[bestchan]); 681138568Ssam return; 682116742Ssam } 683138568Ssam /* no suitable channel, should not happen */ 684138568Ssam } 685138568Ssam 686138568Ssam /* 687138568Ssam * When manually sequencing the state machine; scan just once 688138568Ssam * regardless of whether we have a candidate or not. The 689138568Ssam * controlling application is expected to setup state and 690138568Ssam * initiate an association. 691138568Ssam */ 692138568Ssam if (ic->ic_roaming == IEEE80211_ROAMING_MANUAL) 693116742Ssam return; 694138568Ssam /* 695138568Ssam * Automatic sequencing; look for a candidate and 696138568Ssam * if found join the network. 697138568Ssam */ 698140448Ssam /* NB: unlocked read should be ok */ 699140448Ssam if (TAILQ_FIRST(&nt->nt_node) == NULL) { 700138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, 701138568Ssam "%s: no scan candidate\n", __func__); 702116742Ssam notfound: 703116742Ssam if (ic->ic_opmode == IEEE80211_M_IBSS && 704116742Ssam (ic->ic_flags & IEEE80211_F_IBSSON) && 705116742Ssam ic->ic_des_esslen != 0) { 706116742Ssam ieee80211_create_ibss(ic, ic->ic_ibss_chan); 707116742Ssam return; 708116742Ssam } 709116742Ssam /* 710148432Ssam * Decrement the failure counts so entries will be 711148432Ssam * reconsidered the next time around. We really want 712148432Ssam * to do this only for sta's where we've previously 713153352Ssam * had some success. 714148432Ssam */ 715148432Ssam IEEE80211_NODE_LOCK(nt); 716148432Ssam TAILQ_FOREACH(ni, &nt->nt_node, ni_list) 717148432Ssam if (ni->ni_fails) 718148432Ssam ni->ni_fails--; 719148432Ssam IEEE80211_NODE_UNLOCK(nt); 720148432Ssam /* 721116742Ssam * Reset the list of channels to scan and start again. 722116742Ssam */ 723138568Ssam ieee80211_reset_scan(ic); 724138568Ssam ic->ic_flags |= IEEE80211_F_SCAN; 725138568Ssam ieee80211_next_scan(ic); 726116742Ssam return; 727116742Ssam } 728116742Ssam selbs = NULL; 729138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, "\t%s\n", 730138568Ssam "macaddr bssid chan rssi rate flag wep essid"); 731140448Ssam IEEE80211_NODE_LOCK(nt); 732140448Ssam TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 733138568Ssam if (ieee80211_match_bss(ic, ni) == 0) { 734116742Ssam if (selbs == NULL) 735116742Ssam selbs = ni; 736140448Ssam else if (ieee80211_node_compare(ic, ni, selbs) > 0) 737116742Ssam selbs = ni; 738116742Ssam } 739116742Ssam } 740140448Ssam if (selbs != NULL) /* NB: grab ref while dropping lock */ 741140448Ssam (void) ieee80211_ref_node(selbs); 742140448Ssam IEEE80211_NODE_UNLOCK(nt); 743116742Ssam if (selbs == NULL) 744116742Ssam goto notfound; 745138568Ssam if (!ieee80211_sta_join(ic, selbs)) { 746140448Ssam ieee80211_free_node(selbs); 747138568Ssam goto notfound; 748138568Ssam } 749138568Ssam} 750138568Ssam 751138568Ssam/* 752138568Ssam * Handle 802.11 ad hoc network merge. The 753138568Ssam * convention, set by the Wireless Ethernet Compatibility Alliance 754138568Ssam * (WECA), is that an 802.11 station will change its BSSID to match 755138568Ssam * the "oldest" 802.11 ad hoc network, on the same channel, that 756138568Ssam * has the station's desired SSID. The "oldest" 802.11 network 757138568Ssam * sends beacons with the greatest TSF timestamp. 758138568Ssam * 759138568Ssam * The caller is assumed to validate TSF's before attempting a merge. 760138568Ssam * 761138568Ssam * Return !0 if the BSSID changed, 0 otherwise. 762138568Ssam */ 763138568Ssamint 764148306Ssamieee80211_ibss_merge(struct ieee80211_node *ni) 765138568Ssam{ 766148306Ssam struct ieee80211com *ic = ni->ni_ic; 767138568Ssam 768140453Ssam if (ni == ic->ic_bss || 769140453Ssam IEEE80211_ADDR_EQ(ni->ni_bssid, ic->ic_bss->ni_bssid)) { 770138568Ssam /* unchanged, nothing to do */ 771138568Ssam return 0; 772138568Ssam } 773138568Ssam if (ieee80211_match_bss(ic, ni) != 0) { /* capabilities mismatch */ 774138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 775138568Ssam "%s: merge failed, capabilities mismatch\n", __func__); 776138568Ssam ic->ic_stats.is_ibss_capmismatch++; 777138568Ssam return 0; 778138568Ssam } 779138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 780138568Ssam "%s: new bssid %s: %s preamble, %s slot time%s\n", __func__, 781138568Ssam ether_sprintf(ni->ni_bssid), 782138568Ssam ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long", 783138568Ssam ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long", 784138568Ssam ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : "" 785138568Ssam ); 786140753Ssam return ieee80211_sta_join(ic, ieee80211_ref_node(ni)); 787138568Ssam} 788138568Ssam 789138568Ssam/* 790138568Ssam * Join the specified IBSS/BSS network. The node is assumed to 791138568Ssam * be passed in with a held reference. 792138568Ssam */ 793138568Ssamint 794138568Ssamieee80211_sta_join(struct ieee80211com *ic, struct ieee80211_node *selbs) 795138568Ssam{ 796138568Ssam struct ieee80211_node *obss; 797138568Ssam 798116742Ssam if (ic->ic_opmode == IEEE80211_M_IBSS) { 799140753Ssam struct ieee80211_node_table *nt; 800138568Ssam /* 801140440Ssam * Delete unusable rates; we've already checked 802140440Ssam * that the negotiated rate set is acceptable. 803138568Ssam */ 804148299Ssam ieee80211_fix_rate(selbs, IEEE80211_F_DODEL); 805127772Ssam /* 806140753Ssam * Fillin the neighbor table; it will already 807139521Ssam * exist if we are simply switching mastership. 808140753Ssam * XXX ic_sta always setup so this is unnecessary? 809127772Ssam */ 810140753Ssam nt = &ic->ic_sta; 811140753Ssam IEEE80211_NODE_LOCK(nt); 812140753Ssam nt->nt_name = "neighbor"; 813140753Ssam nt->nt_inact_init = ic->ic_inact_run; 814140753Ssam IEEE80211_NODE_UNLOCK(nt); 815138568Ssam } 816138568Ssam 817138568Ssam /* 818138568Ssam * Committed to selbs, setup state. 819138568Ssam */ 820138568Ssam obss = ic->ic_bss; 821140753Ssam ic->ic_bss = selbs; /* NB: caller assumed to bump refcnt */ 822153352Ssam if (obss != NULL) { 823153352Ssam copy_bss(selbs, obss); 824138568Ssam ieee80211_free_node(obss); 825153352Ssam } 826138568Ssam /* 827138568Ssam * Set the erp state (mostly the slot time) to deal with 828138568Ssam * the auto-select case; this should be redundant if the 829138568Ssam * mode is locked. 830138568Ssam */ 831138568Ssam ic->ic_curmode = ieee80211_chan2mode(ic, selbs->ni_chan); 832148936Ssam ic->ic_curchan = selbs->ni_chan; 833138568Ssam ieee80211_reset_erp(ic); 834138568Ssam ieee80211_wme_initparams(ic); 835140753Ssam 836140753Ssam if (ic->ic_opmode == IEEE80211_M_STA) 837140753Ssam ieee80211_new_state(ic, IEEE80211_S_AUTH, -1); 838140753Ssam else 839117811Ssam ieee80211_new_state(ic, IEEE80211_S_RUN, -1); 840138568Ssam return 1; 841116742Ssam} 842116742Ssam 843138568Ssam/* 844138568Ssam * Leave the specified IBSS/BSS network. The node is assumed to 845138568Ssam * be passed in with a held reference. 846138568Ssam */ 847138568Ssamvoid 848138568Ssamieee80211_sta_leave(struct ieee80211com *ic, struct ieee80211_node *ni) 849138568Ssam{ 850138568Ssam ic->ic_node_cleanup(ni); 851138568Ssam ieee80211_notify_node_leave(ic, ni); 852138568Ssam} 853138568Ssam 854116742Ssamstatic struct ieee80211_node * 855138568Ssamnode_alloc(struct ieee80211_node_table *nt) 856116742Ssam{ 857127768Ssam struct ieee80211_node *ni; 858138568Ssam 859127768Ssam MALLOC(ni, struct ieee80211_node *, sizeof(struct ieee80211_node), 860127768Ssam M_80211_NODE, M_NOWAIT | M_ZERO); 861127768Ssam return ni; 862116742Ssam} 863116742Ssam 864138568Ssam/* 865138568Ssam * Reclaim any resources in a node and reset any critical 866138568Ssam * state. Typically nodes are free'd immediately after, 867138568Ssam * but in some cases the storage may be reused so we need 868138568Ssam * to insure consistent state (should probably fix that). 869138568Ssam */ 870116742Ssamstatic void 871138568Ssamnode_cleanup(struct ieee80211_node *ni) 872116742Ssam{ 873138568Ssam#define N(a) (sizeof(a)/sizeof(a[0])) 874138568Ssam struct ieee80211com *ic = ni->ni_ic; 875138568Ssam int i, qlen; 876138568Ssam 877138568Ssam /* NB: preserve ni_table */ 878138568Ssam if (ni->ni_flags & IEEE80211_NODE_PWR_MGT) { 879138568Ssam ic->ic_ps_sta--; 880138568Ssam ni->ni_flags &= ~IEEE80211_NODE_PWR_MGT; 881138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_POWER, 882138568Ssam "[%s] power save mode off, %u sta's in ps mode\n", 883138568Ssam ether_sprintf(ni->ni_macaddr), ic->ic_ps_sta); 884138568Ssam } 885147788Ssam /* 886147788Ssam * Clear AREF flag that marks the authorization refcnt bump 887147788Ssam * has happened. This is probably not needed as the node 888147788Ssam * should always be removed from the table so not found but 889147788Ssam * do it just in case. 890147788Ssam */ 891147788Ssam ni->ni_flags &= ~IEEE80211_NODE_AREF; 892138568Ssam 893138568Ssam /* 894138568Ssam * Drain power save queue and, if needed, clear TIM. 895138568Ssam */ 896138568Ssam IEEE80211_NODE_SAVEQ_DRAIN(ni, qlen); 897138568Ssam if (qlen != 0 && ic->ic_set_tim != NULL) 898148304Ssam ic->ic_set_tim(ni, 0); 899138568Ssam 900138568Ssam ni->ni_associd = 0; 901138568Ssam if (ni->ni_challenge != NULL) { 902138568Ssam FREE(ni->ni_challenge, M_DEVBUF); 903138568Ssam ni->ni_challenge = NULL; 904138568Ssam } 905138568Ssam /* 906138568Ssam * Preserve SSID, WPA, and WME ie's so the bss node is 907138568Ssam * reusable during a re-auth/re-assoc state transition. 908138568Ssam * If we remove these data they will not be recreated 909138568Ssam * because they come from a probe-response or beacon frame 910138568Ssam * which cannot be expected prior to the association-response. 911138568Ssam * This should not be an issue when operating in other modes 912138568Ssam * as stations leaving always go through a full state transition 913138568Ssam * which will rebuild this state. 914138568Ssam * 915138568Ssam * XXX does this leave us open to inheriting old state? 916138568Ssam */ 917138568Ssam for (i = 0; i < N(ni->ni_rxfrag); i++) 918138568Ssam if (ni->ni_rxfrag[i] != NULL) { 919138568Ssam m_freem(ni->ni_rxfrag[i]); 920138568Ssam ni->ni_rxfrag[i] = NULL; 921138568Ssam } 922148863Ssam /* 923148863Ssam * Must be careful here to remove any key map entry w/o a LOR. 924148863Ssam */ 925148863Ssam ieee80211_node_delucastkey(ni); 926138568Ssam#undef N 927116742Ssam} 928116742Ssam 929116742Ssamstatic void 930138568Ssamnode_free(struct ieee80211_node *ni) 931116742Ssam{ 932138568Ssam struct ieee80211com *ic = ni->ni_ic; 933138568Ssam 934138568Ssam ic->ic_node_cleanup(ni); 935138568Ssam if (ni->ni_wpa_ie != NULL) 936138568Ssam FREE(ni->ni_wpa_ie, M_DEVBUF); 937138568Ssam if (ni->ni_wme_ie != NULL) 938138568Ssam FREE(ni->ni_wme_ie, M_DEVBUF); 939138568Ssam IEEE80211_NODE_SAVEQ_DESTROY(ni); 940138568Ssam FREE(ni, M_80211_NODE); 941116742Ssam} 942116742Ssam 943120104Ssamstatic u_int8_t 944138568Ssamnode_getrssi(const struct ieee80211_node *ni) 945120104Ssam{ 946120104Ssam return ni->ni_rssi; 947120104Ssam} 948120104Ssam 949116742Ssamstatic void 950138568Ssamieee80211_setup_node(struct ieee80211_node_table *nt, 951138568Ssam struct ieee80211_node *ni, const u_int8_t *macaddr) 952116742Ssam{ 953138568Ssam struct ieee80211com *ic = nt->nt_ic; 954116742Ssam int hash; 955116742Ssam 956138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 957140766Ssam "%s %p<%s> in %s table\n", __func__, ni, 958138568Ssam ether_sprintf(macaddr), nt->nt_name); 959138568Ssam 960116742Ssam IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 961116742Ssam hash = IEEE80211_NODE_HASH(macaddr); 962138568Ssam ieee80211_node_initref(ni); /* mark referenced */ 963138568Ssam ni->ni_chan = IEEE80211_CHAN_ANYC; 964138568Ssam ni->ni_authmode = IEEE80211_AUTH_OPEN; 965138568Ssam ni->ni_txpower = ic->ic_txpowlimit; /* max power */ 966138568Ssam ieee80211_crypto_resetkey(ic, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE); 967139528Ssam ni->ni_inact_reload = nt->nt_inact_init; 968139528Ssam ni->ni_inact = ni->ni_inact_reload; 969138568Ssam IEEE80211_NODE_SAVEQ_INIT(ni, "unknown"); 970138568Ssam 971138568Ssam IEEE80211_NODE_LOCK(nt); 972138568Ssam TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list); 973138568Ssam LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash); 974138568Ssam ni->ni_table = nt; 975138568Ssam ni->ni_ic = ic; 976138568Ssam IEEE80211_NODE_UNLOCK(nt); 977116742Ssam} 978116742Ssam 979116742Ssamstruct ieee80211_node * 980138568Ssamieee80211_alloc_node(struct ieee80211_node_table *nt, const u_int8_t *macaddr) 981116742Ssam{ 982138568Ssam struct ieee80211com *ic = nt->nt_ic; 983138568Ssam struct ieee80211_node *ni; 984138568Ssam 985138568Ssam ni = ic->ic_node_alloc(nt); 986116742Ssam if (ni != NULL) 987138568Ssam ieee80211_setup_node(nt, ni, macaddr); 988127769Ssam else 989127769Ssam ic->ic_stats.is_rx_nodealloc++; 990116742Ssam return ni; 991116742Ssam} 992116742Ssam 993148777Ssam/* 994148777Ssam * Craft a temporary node suitable for sending a management frame 995148777Ssam * to the specified station. We craft only as much state as we 996148777Ssam * need to do the work since the node will be immediately reclaimed 997148777Ssam * once the send completes. 998148777Ssam */ 999116742Ssamstruct ieee80211_node * 1000148777Ssamieee80211_tmp_node(struct ieee80211com *ic, const u_int8_t *macaddr) 1001148777Ssam{ 1002148777Ssam struct ieee80211_node *ni; 1003148777Ssam 1004148777Ssam ni = ic->ic_node_alloc(&ic->ic_sta); 1005148777Ssam if (ni != NULL) { 1006148777Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1007148777Ssam "%s %p<%s>\n", __func__, ni, ether_sprintf(macaddr)); 1008148777Ssam 1009148777Ssam IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1010148777Ssam IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_bss->ni_bssid); 1011148777Ssam ieee80211_node_initref(ni); /* mark referenced */ 1012148777Ssam ni->ni_txpower = ic->ic_bss->ni_txpower; 1013148777Ssam /* NB: required by ieee80211_fix_rate */ 1014148777Ssam ieee80211_set_chan(ic, ni, ic->ic_bss->ni_chan); 1015148777Ssam ieee80211_crypto_resetkey(ic, &ni->ni_ucastkey, 1016148777Ssam IEEE80211_KEYIX_NONE); 1017148777Ssam /* XXX optimize away */ 1018148777Ssam IEEE80211_NODE_SAVEQ_INIT(ni, "unknown"); 1019148777Ssam 1020148777Ssam ni->ni_table = NULL; /* NB: pedantic */ 1021148777Ssam ni->ni_ic = ic; 1022148777Ssam } else { 1023148777Ssam /* XXX msg */ 1024148777Ssam ic->ic_stats.is_rx_nodealloc++; 1025148777Ssam } 1026148777Ssam return ni; 1027148777Ssam} 1028148777Ssam 1029148777Ssamstruct ieee80211_node * 1030138568Ssamieee80211_dup_bss(struct ieee80211_node_table *nt, const u_int8_t *macaddr) 1031116742Ssam{ 1032138568Ssam struct ieee80211com *ic = nt->nt_ic; 1033138568Ssam struct ieee80211_node *ni; 1034138568Ssam 1035138568Ssam ni = ic->ic_node_alloc(nt); 1036116742Ssam if (ni != NULL) { 1037138568Ssam ieee80211_setup_node(nt, ni, macaddr); 1038127770Ssam /* 1039127770Ssam * Inherit from ic_bss. 1040127770Ssam */ 1041138568Ssam ni->ni_authmode = ic->ic_bss->ni_authmode; 1042138568Ssam ni->ni_txpower = ic->ic_bss->ni_txpower; 1043138568Ssam ni->ni_vlan = ic->ic_bss->ni_vlan; /* XXX?? */ 1044127770Ssam IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_bss->ni_bssid); 1045138568Ssam ieee80211_set_chan(ic, ni, ic->ic_bss->ni_chan); 1046138568Ssam ni->ni_rsn = ic->ic_bss->ni_rsn; 1047127770Ssam } else 1048127770Ssam ic->ic_stats.is_rx_nodealloc++; 1049116742Ssam return ni; 1050116742Ssam} 1051116742Ssam 1052127772Ssamstatic struct ieee80211_node * 1053138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1054138568Ssam_ieee80211_find_node_debug(struct ieee80211_node_table *nt, 1055138568Ssam const u_int8_t *macaddr, const char *func, int line) 1056138568Ssam#else 1057138568Ssam_ieee80211_find_node(struct ieee80211_node_table *nt, 1058138568Ssam const u_int8_t *macaddr) 1059138568Ssam#endif 1060116742Ssam{ 1061116742Ssam struct ieee80211_node *ni; 1062116742Ssam int hash; 1063116742Ssam 1064138568Ssam IEEE80211_NODE_LOCK_ASSERT(nt); 1065127772Ssam 1066116742Ssam hash = IEEE80211_NODE_HASH(macaddr); 1067138568Ssam LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1068116742Ssam if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1069138568Ssam ieee80211_ref_node(ni); /* mark referenced */ 1070138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1071138568Ssam IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE, 1072140766Ssam "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1073140766Ssam func, line, 1074140766Ssam ni, ether_sprintf(ni->ni_macaddr), 1075140766Ssam ieee80211_node_refcnt(ni)); 1076138568Ssam#endif 1077127772Ssam return ni; 1078116742Ssam } 1079116742Ssam } 1080127772Ssam return NULL; 1081127772Ssam} 1082138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1083138568Ssam#define _ieee80211_find_node(nt, mac) \ 1084138568Ssam _ieee80211_find_node_debug(nt, mac, func, line) 1085138568Ssam#endif 1086127772Ssam 1087127772Ssamstruct ieee80211_node * 1088138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1089138568Ssamieee80211_find_node_debug(struct ieee80211_node_table *nt, 1090138568Ssam const u_int8_t *macaddr, const char *func, int line) 1091138568Ssam#else 1092138568Ssamieee80211_find_node(struct ieee80211_node_table *nt, const u_int8_t *macaddr) 1093138568Ssam#endif 1094127772Ssam{ 1095127772Ssam struct ieee80211_node *ni; 1096127772Ssam 1097138568Ssam IEEE80211_NODE_LOCK(nt); 1098138568Ssam ni = _ieee80211_find_node(nt, macaddr); 1099138568Ssam IEEE80211_NODE_UNLOCK(nt); 1100116742Ssam return ni; 1101116742Ssam} 1102116742Ssam 1103116742Ssam/* 1104138568Ssam * Fake up a node; this handles node discovery in adhoc mode. 1105138568Ssam * Note that for the driver's benefit we we treat this like 1106138568Ssam * an association so the driver has an opportunity to setup 1107138568Ssam * it's private state. 1108138568Ssam */ 1109138568Ssamstruct ieee80211_node * 1110138568Ssamieee80211_fakeup_adhoc_node(struct ieee80211_node_table *nt, 1111138568Ssam const u_int8_t macaddr[IEEE80211_ADDR_LEN]) 1112138568Ssam{ 1113138568Ssam struct ieee80211com *ic = nt->nt_ic; 1114138568Ssam struct ieee80211_node *ni; 1115138568Ssam 1116153073Ssam IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE, 1117153073Ssam "%s: mac<%s>\n", __func__, ether_sprintf(macaddr)); 1118138568Ssam ni = ieee80211_dup_bss(nt, macaddr); 1119138568Ssam if (ni != NULL) { 1120138568Ssam /* XXX no rate negotiation; just dup */ 1121138568Ssam ni->ni_rates = ic->ic_bss->ni_rates; 1122139524Ssam if (ic->ic_newassoc != NULL) 1123148307Ssam ic->ic_newassoc(ni, 1); 1124138568Ssam /* XXX not right for 802.1x/WPA */ 1125148302Ssam ieee80211_node_authorize(ni); 1126153404Ssam if (ic->ic_opmode == IEEE80211_M_AHDEMO) { 1127153404Ssam /* 1128153404Ssam * Blindly propagate capabilities based on the 1129153404Ssam * local configuration. In particular this permits 1130153404Ssam * us to use QoS to disable ACK's. 1131153404Ssam */ 1132153404Ssam if (ic->ic_flags & IEEE80211_F_WME) 1133153404Ssam ni->ni_flags |= IEEE80211_NODE_QOS; 1134153404Ssam } 1135138568Ssam } 1136138568Ssam return ni; 1137138568Ssam} 1138138568Ssam 1139148936Ssam#ifdef IEEE80211_DEBUG 1140148936Ssamstatic void 1141148936Ssamdump_probe_beacon(u_int8_t subtype, int isnew, 1142148936Ssam const u_int8_t mac[IEEE80211_ADDR_LEN], 1143148936Ssam const struct ieee80211_scanparams *sp) 1144148936Ssam{ 1145148936Ssam 1146148936Ssam printf("[%s] %s%s on chan %u (bss chan %u) ", 1147148936Ssam ether_sprintf(mac), isnew ? "new " : "", 1148148936Ssam ieee80211_mgt_subtype_name[subtype >> IEEE80211_FC0_SUBTYPE_SHIFT], 1149148936Ssam sp->chan, sp->bchan); 1150148936Ssam ieee80211_print_essid(sp->ssid + 2, sp->ssid[1]); 1151148936Ssam printf("\n"); 1152148936Ssam 1153148936Ssam if (isnew) { 1154148936Ssam printf("[%s] caps 0x%x bintval %u erp 0x%x", 1155148936Ssam ether_sprintf(mac), sp->capinfo, sp->bintval, sp->erp); 1156148936Ssam if (sp->country != NULL) { 1157148936Ssam#ifdef __FreeBSD__ 1158148936Ssam printf(" country info %*D", 1159148936Ssam sp->country[1], sp->country+2, " "); 1160148936Ssam#else 1161148936Ssam int i; 1162148936Ssam printf(" country info"); 1163148936Ssam for (i = 0; i < sp->country[1]; i++) 1164148936Ssam printf(" %02x", sp->country[i+2]); 1165148936Ssam#endif 1166148936Ssam } 1167148936Ssam printf("\n"); 1168148936Ssam } 1169148936Ssam} 1170148936Ssam#endif /* IEEE80211_DEBUG */ 1171148936Ssam 1172148936Ssamstatic void 1173148936Ssamsaveie(u_int8_t **iep, const u_int8_t *ie) 1174148936Ssam{ 1175148936Ssam 1176148936Ssam if (ie == NULL) 1177148936Ssam *iep = NULL; 1178148936Ssam else 1179148936Ssam ieee80211_saveie(iep, ie); 1180148936Ssam} 1181148936Ssam 1182148936Ssam/* 1183148936Ssam * Process a beacon or probe response frame. 1184148936Ssam */ 1185148936Ssamvoid 1186148936Ssamieee80211_add_scan(struct ieee80211com *ic, 1187148936Ssam const struct ieee80211_scanparams *sp, 1188148936Ssam const struct ieee80211_frame *wh, 1189148936Ssam int subtype, int rssi, int rstamp) 1190148936Ssam{ 1191148936Ssam#define ISPROBE(_st) ((_st) == IEEE80211_FC0_SUBTYPE_PROBE_RESP) 1192148936Ssam struct ieee80211_node_table *nt = &ic->ic_scan; 1193148936Ssam struct ieee80211_node *ni; 1194148936Ssam int newnode = 0; 1195148936Ssam 1196148936Ssam ni = ieee80211_find_node(nt, wh->i_addr2); 1197148936Ssam if (ni == NULL) { 1198148936Ssam /* 1199148936Ssam * Create a new entry. 1200148936Ssam */ 1201148936Ssam ni = ic->ic_node_alloc(nt); 1202148936Ssam if (ni == NULL) { 1203148936Ssam ic->ic_stats.is_rx_nodealloc++; 1204148936Ssam return; 1205148936Ssam } 1206148936Ssam ieee80211_setup_node(nt, ni, wh->i_addr2); 1207148936Ssam /* 1208148936Ssam * XXX inherit from ic_bss. 1209148936Ssam */ 1210148936Ssam ni->ni_authmode = ic->ic_bss->ni_authmode; 1211148936Ssam ni->ni_txpower = ic->ic_bss->ni_txpower; 1212148936Ssam ni->ni_vlan = ic->ic_bss->ni_vlan; /* XXX?? */ 1213148936Ssam ieee80211_set_chan(ic, ni, ic->ic_curchan); 1214148936Ssam ni->ni_rsn = ic->ic_bss->ni_rsn; 1215148936Ssam newnode = 1; 1216148936Ssam } 1217148936Ssam#ifdef IEEE80211_DEBUG 1218148936Ssam if (ieee80211_msg_scan(ic) && (ic->ic_flags & IEEE80211_F_SCAN)) 1219148936Ssam dump_probe_beacon(subtype, newnode, wh->i_addr2, sp); 1220148936Ssam#endif 1221148936Ssam /* XXX ap beaconing multiple ssid w/ same bssid */ 1222148936Ssam if (sp->ssid[1] != 0 && 1223148936Ssam (ISPROBE(subtype) || ni->ni_esslen == 0)) { 1224148936Ssam ni->ni_esslen = sp->ssid[1]; 1225148936Ssam memset(ni->ni_essid, 0, sizeof(ni->ni_essid)); 1226148936Ssam memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]); 1227148936Ssam } 1228148936Ssam ni->ni_scangen = ic->ic_scan.nt_scangen; 1229148936Ssam IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3); 1230148936Ssam ni->ni_rssi = rssi; 1231148936Ssam ni->ni_rstamp = rstamp; 1232148936Ssam memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp)); 1233148936Ssam ni->ni_intval = sp->bintval; 1234148936Ssam ni->ni_capinfo = sp->capinfo; 1235148936Ssam ni->ni_chan = &ic->ic_channels[sp->chan]; 1236148936Ssam ni->ni_fhdwell = sp->fhdwell; 1237148936Ssam ni->ni_fhindex = sp->fhindex; 1238148936Ssam ni->ni_erp = sp->erp; 1239148936Ssam if (sp->tim != NULL) { 1240148936Ssam struct ieee80211_tim_ie *ie = 1241148936Ssam (struct ieee80211_tim_ie *) sp->tim; 1242148936Ssam 1243148936Ssam ni->ni_dtim_count = ie->tim_count; 1244148936Ssam ni->ni_dtim_period = ie->tim_period; 1245148936Ssam } 1246148936Ssam /* 1247148936Ssam * Record the byte offset from the mac header to 1248148936Ssam * the start of the TIM information element for 1249148936Ssam * use by hardware and/or to speedup software 1250148936Ssam * processing of beacon frames. 1251148936Ssam */ 1252148936Ssam ni->ni_timoff = sp->timoff; 1253148936Ssam /* 1254148936Ssam * Record optional information elements that might be 1255148936Ssam * used by applications or drivers. 1256148936Ssam */ 1257148936Ssam saveie(&ni->ni_wme_ie, sp->wme); 1258148936Ssam saveie(&ni->ni_wpa_ie, sp->wpa); 1259148936Ssam 1260148936Ssam /* NB: must be after ni_chan is setup */ 1261148936Ssam ieee80211_setup_rates(ni, sp->rates, sp->xrates, IEEE80211_F_DOSORT); 1262148936Ssam 1263148936Ssam if (!newnode) 1264148936Ssam ieee80211_free_node(ni); 1265148936Ssam#undef ISPROBE 1266148936Ssam} 1267148936Ssam 1268153073Ssamvoid 1269153073Ssamieee80211_init_neighbor(struct ieee80211_node *ni, 1270153073Ssam const struct ieee80211_frame *wh, 1271153073Ssam const struct ieee80211_scanparams *sp) 1272153073Ssam{ 1273153073Ssam 1274153073Ssam IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE, 1275153073Ssam "%s: %p<%s>\n", __func__, ni, ether_sprintf(ni->ni_macaddr)); 1276153073Ssam ni->ni_esslen = sp->ssid[1]; 1277153073Ssam memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]); 1278153073Ssam IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3); 1279153073Ssam memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp)); 1280153073Ssam ni->ni_intval = sp->bintval; 1281153073Ssam ni->ni_capinfo = sp->capinfo; 1282153073Ssam ni->ni_chan = ni->ni_ic->ic_curchan; 1283153073Ssam ni->ni_fhdwell = sp->fhdwell; 1284153073Ssam ni->ni_fhindex = sp->fhindex; 1285153073Ssam ni->ni_erp = sp->erp; 1286153073Ssam ni->ni_timoff = sp->timoff; 1287153073Ssam if (sp->wme != NULL) 1288153073Ssam ieee80211_saveie(&ni->ni_wme_ie, sp->wme); 1289153073Ssam if (sp->wpa != NULL) 1290153073Ssam ieee80211_saveie(&ni->ni_wpa_ie, sp->wpa); 1291153073Ssam 1292153073Ssam /* NB: must be after ni_chan is setup */ 1293153073Ssam ieee80211_setup_rates(ni, sp->rates, sp->xrates, IEEE80211_F_DOSORT); 1294153073Ssam} 1295153073Ssam 1296148936Ssam/* 1297148936Ssam * Do node discovery in adhoc mode on receipt of a beacon 1298148936Ssam * or probe response frame. Note that for the driver's 1299148936Ssam * benefit we we treat this like an association so the 1300148936Ssam * driver has an opportunity to setup it's private state. 1301148936Ssam */ 1302148936Ssamstruct ieee80211_node * 1303148936Ssamieee80211_add_neighbor(struct ieee80211com *ic, 1304148936Ssam const struct ieee80211_frame *wh, 1305148936Ssam const struct ieee80211_scanparams *sp) 1306148936Ssam{ 1307148936Ssam struct ieee80211_node *ni; 1308148936Ssam 1309153073Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1310153073Ssam "%s: mac<%s>\n", __func__, ether_sprintf(wh->i_addr2)); 1311148936Ssam ni = ieee80211_dup_bss(&ic->ic_sta, wh->i_addr2);/* XXX alloc_node? */ 1312148936Ssam if (ni != NULL) { 1313153073Ssam ieee80211_init_neighbor(ni, wh, sp); 1314148936Ssam if (ic->ic_newassoc != NULL) 1315148936Ssam ic->ic_newassoc(ni, 1); 1316148936Ssam /* XXX not right for 802.1x/WPA */ 1317148936Ssam ieee80211_node_authorize(ni); 1318148936Ssam } 1319148936Ssam return ni; 1320148936Ssam} 1321148936Ssam 1322148863Ssam#define IS_CTL(wh) \ 1323148863Ssam ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) == IEEE80211_FC0_TYPE_CTL) 1324148863Ssam#define IS_PSPOLL(wh) \ 1325148863Ssam ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == IEEE80211_FC0_SUBTYPE_PS_POLL) 1326138568Ssam/* 1327138568Ssam * Locate the node for sender, track state, and then pass the 1328138568Ssam * (referenced) node up to the 802.11 layer for its use. We 1329138568Ssam * are required to pass some node so we fall back to ic_bss 1330138568Ssam * when this frame is from an unknown sender. The 802.11 layer 1331138568Ssam * knows this means the sender wasn't in the node table and 1332138568Ssam * acts accordingly. 1333138568Ssam */ 1334138568Ssamstruct ieee80211_node * 1335138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1336138568Ssamieee80211_find_rxnode_debug(struct ieee80211com *ic, 1337138568Ssam const struct ieee80211_frame_min *wh, const char *func, int line) 1338138568Ssam#else 1339138568Ssamieee80211_find_rxnode(struct ieee80211com *ic, 1340138568Ssam const struct ieee80211_frame_min *wh) 1341138568Ssam#endif 1342138568Ssam{ 1343138568Ssam struct ieee80211_node_table *nt; 1344138568Ssam struct ieee80211_node *ni; 1345138568Ssam 1346138568Ssam /* XXX may want scanned nodes in the neighbor table for adhoc */ 1347138568Ssam if (ic->ic_opmode == IEEE80211_M_STA || 1348138568Ssam ic->ic_opmode == IEEE80211_M_MONITOR || 1349138568Ssam (ic->ic_flags & IEEE80211_F_SCAN)) 1350138568Ssam nt = &ic->ic_scan; 1351138568Ssam else 1352140753Ssam nt = &ic->ic_sta; 1353138568Ssam /* XXX check ic_bss first in station mode */ 1354138568Ssam /* XXX 4-address frames? */ 1355138568Ssam IEEE80211_NODE_LOCK(nt); 1356138568Ssam if (IS_CTL(wh) && !IS_PSPOLL(wh) /*&& !IS_RTS(ah)*/) 1357138568Ssam ni = _ieee80211_find_node(nt, wh->i_addr1); 1358138568Ssam else 1359138568Ssam ni = _ieee80211_find_node(nt, wh->i_addr2); 1360148863Ssam if (ni == NULL) 1361148863Ssam ni = ieee80211_ref_node(ic->ic_bss); 1362138568Ssam IEEE80211_NODE_UNLOCK(nt); 1363138568Ssam 1364148863Ssam return ni; 1365148863Ssam} 1366148863Ssam 1367148863Ssam/* 1368148863Ssam * Like ieee80211_find_rxnode but use the supplied h/w 1369148863Ssam * key index as a hint to locate the node in the key 1370148863Ssam * mapping table. If an entry is present at the key 1371148863Ssam * index we return it; otherwise do a normal lookup and 1372148863Ssam * update the mapping table if the station has a unicast 1373148863Ssam * key assigned to it. 1374148863Ssam */ 1375148863Ssamstruct ieee80211_node * 1376148863Ssam#ifdef IEEE80211_DEBUG_REFCNT 1377148863Ssamieee80211_find_rxnode_withkey_debug(struct ieee80211com *ic, 1378148863Ssam const struct ieee80211_frame_min *wh, ieee80211_keyix keyix, 1379148863Ssam const char *func, int line) 1380148863Ssam#else 1381148863Ssamieee80211_find_rxnode_withkey(struct ieee80211com *ic, 1382148863Ssam const struct ieee80211_frame_min *wh, ieee80211_keyix keyix) 1383148863Ssam#endif 1384148863Ssam{ 1385148863Ssam struct ieee80211_node_table *nt; 1386148863Ssam struct ieee80211_node *ni; 1387148863Ssam 1388148863Ssam if (ic->ic_opmode == IEEE80211_M_STA || 1389148863Ssam ic->ic_opmode == IEEE80211_M_MONITOR || 1390148863Ssam (ic->ic_flags & IEEE80211_F_SCAN)) 1391148863Ssam nt = &ic->ic_scan; 1392148863Ssam else 1393148863Ssam nt = &ic->ic_sta; 1394148863Ssam IEEE80211_NODE_LOCK(nt); 1395148863Ssam if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) 1396148863Ssam ni = nt->nt_keyixmap[keyix]; 1397148863Ssam else 1398148863Ssam ni = NULL; 1399148863Ssam if (ni == NULL) { 1400148863Ssam if (IS_CTL(wh) && !IS_PSPOLL(wh) /*&& !IS_RTS(ah)*/) 1401148863Ssam ni = _ieee80211_find_node(nt, wh->i_addr1); 1402148863Ssam else 1403148863Ssam ni = _ieee80211_find_node(nt, wh->i_addr2); 1404148863Ssam if (ni == NULL) 1405148863Ssam ni = ieee80211_ref_node(ic->ic_bss); 1406148863Ssam if (nt->nt_keyixmap != NULL) { 1407148863Ssam /* 1408148863Ssam * If the station has a unicast key cache slot 1409148863Ssam * assigned update the key->node mapping table. 1410148863Ssam */ 1411148863Ssam keyix = ni->ni_ucastkey.wk_rxkeyix; 1412148863Ssam /* XXX can keyixmap[keyix] != NULL? */ 1413148863Ssam if (keyix < nt->nt_keyixmax && 1414148863Ssam nt->nt_keyixmap[keyix] == NULL) { 1415148863Ssam IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE, 1416148863Ssam "%s: add key map entry %p<%s> refcnt %d\n", 1417148863Ssam __func__, ni, ether_sprintf(ni->ni_macaddr), 1418148863Ssam ieee80211_node_refcnt(ni)+1); 1419148863Ssam nt->nt_keyixmap[keyix] = ieee80211_ref_node(ni); 1420148863Ssam } 1421148863Ssam } 1422148863Ssam } else { 1423148863Ssam ieee80211_ref_node(ni); 1424148863Ssam } 1425148863Ssam IEEE80211_NODE_UNLOCK(nt); 1426148863Ssam 1427148863Ssam return ni; 1428148863Ssam} 1429138568Ssam#undef IS_PSPOLL 1430138568Ssam#undef IS_CTL 1431138568Ssam 1432138568Ssam/* 1433127772Ssam * Return a reference to the appropriate node for sending 1434127772Ssam * a data frame. This handles node discovery in adhoc networks. 1435127772Ssam */ 1436127772Ssamstruct ieee80211_node * 1437138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1438138568Ssamieee80211_find_txnode_debug(struct ieee80211com *ic, const u_int8_t *macaddr, 1439138568Ssam const char *func, int line) 1440138568Ssam#else 1441138568Ssamieee80211_find_txnode(struct ieee80211com *ic, const u_int8_t *macaddr) 1442138568Ssam#endif 1443127772Ssam{ 1444140753Ssam struct ieee80211_node_table *nt = &ic->ic_sta; 1445127772Ssam struct ieee80211_node *ni; 1446127772Ssam 1447127772Ssam /* 1448127772Ssam * The destination address should be in the node table 1449148863Ssam * unless this is a multicast/broadcast frame. We can 1450148863Ssam * also optimize station mode operation, all frames go 1451148863Ssam * to the bss node. 1452127772Ssam */ 1453127772Ssam /* XXX can't hold lock across dup_bss 'cuz of recursive locking */ 1454138568Ssam IEEE80211_NODE_LOCK(nt); 1455148863Ssam if (ic->ic_opmode == IEEE80211_M_STA || IEEE80211_IS_MULTICAST(macaddr)) 1456148863Ssam ni = ieee80211_ref_node(ic->ic_bss); 1457158121Ssam else { 1458148863Ssam ni = _ieee80211_find_node(nt, macaddr); 1459158121Ssam if (ic->ic_opmode == IEEE80211_M_HOSTAP && 1460158121Ssam (ni != NULL && ni->ni_associd == 0)) { 1461158121Ssam /* 1462158121Ssam * Station is not associated; don't permit the 1463158121Ssam * data frame to be sent by returning NULL. This 1464158121Ssam * is kinda a kludge but the least intrusive way 1465158121Ssam * to add this check into all drivers. 1466158121Ssam */ 1467158121Ssam ieee80211_unref_node(&ni); /* NB: null's ni */ 1468158121Ssam } 1469158121Ssam } 1470138568Ssam IEEE80211_NODE_UNLOCK(nt); 1471138568Ssam 1472138568Ssam if (ni == NULL) { 1473138568Ssam if (ic->ic_opmode == IEEE80211_M_IBSS || 1474140497Ssam ic->ic_opmode == IEEE80211_M_AHDEMO) { 1475140497Ssam /* 1476140497Ssam * In adhoc mode cons up a node for the destination. 1477140497Ssam * Note that we need an additional reference for the 1478140497Ssam * caller to be consistent with _ieee80211_find_node. 1479140497Ssam */ 1480138568Ssam ni = ieee80211_fakeup_adhoc_node(nt, macaddr); 1481140497Ssam if (ni != NULL) 1482140497Ssam (void) ieee80211_ref_node(ni); 1483140497Ssam } else { 1484138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_OUTPUT, 1485138568Ssam "[%s] no node, discard frame (%s)\n", 1486138568Ssam ether_sprintf(macaddr), __func__); 1487138568Ssam ic->ic_stats.is_tx_nonode++; 1488127772Ssam } 1489127772Ssam } 1490127772Ssam return ni; 1491127772Ssam} 1492127772Ssam 1493127772Ssam/* 1494116742Ssam * Like find but search based on the channel too. 1495116742Ssam */ 1496116742Ssamstruct ieee80211_node * 1497138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1498138568Ssamieee80211_find_node_with_channel_debug(struct ieee80211_node_table *nt, 1499138568Ssam const u_int8_t *macaddr, struct ieee80211_channel *chan, 1500138568Ssam const char *func, int line) 1501138568Ssam#else 1502138568Ssamieee80211_find_node_with_channel(struct ieee80211_node_table *nt, 1503138568Ssam const u_int8_t *macaddr, struct ieee80211_channel *chan) 1504138568Ssam#endif 1505116742Ssam{ 1506116742Ssam struct ieee80211_node *ni; 1507116742Ssam int hash; 1508116742Ssam 1509116742Ssam hash = IEEE80211_NODE_HASH(macaddr); 1510138568Ssam IEEE80211_NODE_LOCK(nt); 1511138568Ssam LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1512127772Ssam if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr) && 1513127772Ssam ni->ni_chan == chan) { 1514138568Ssam ieee80211_ref_node(ni); /* mark referenced */ 1515138568Ssam IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE, 1516138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1517140766Ssam "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1518140766Ssam func, line, 1519138568Ssam#else 1520140766Ssam "%s %p<%s> refcnt %d\n", __func__, 1521138568Ssam#endif 1522140766Ssam ni, ether_sprintf(ni->ni_macaddr), 1523140766Ssam ieee80211_node_refcnt(ni)); 1524116742Ssam break; 1525116742Ssam } 1526116742Ssam } 1527138568Ssam IEEE80211_NODE_UNLOCK(nt); 1528116742Ssam return ni; 1529116742Ssam} 1530116742Ssam 1531138568Ssam/* 1532138568Ssam * Like find but search based on the ssid too. 1533138568Ssam */ 1534138568Ssamstruct ieee80211_node * 1535138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1536138568Ssamieee80211_find_node_with_ssid_debug(struct ieee80211_node_table *nt, 1537138568Ssam const u_int8_t *macaddr, u_int ssidlen, const u_int8_t *ssid, 1538138568Ssam const char *func, int line) 1539138568Ssam#else 1540138568Ssamieee80211_find_node_with_ssid(struct ieee80211_node_table *nt, 1541138568Ssam const u_int8_t *macaddr, u_int ssidlen, const u_int8_t *ssid) 1542138568Ssam#endif 1543138568Ssam{ 1544147118Ssam#define MATCH_SSID(ni, ssid, ssidlen) \ 1545147118Ssam (ni->ni_esslen == ssidlen && memcmp(ni->ni_essid, ssid, ssidlen) == 0) 1546147118Ssam static const u_int8_t zeromac[IEEE80211_ADDR_LEN]; 1547138568Ssam struct ieee80211com *ic = nt->nt_ic; 1548138568Ssam struct ieee80211_node *ni; 1549138568Ssam int hash; 1550138568Ssam 1551138568Ssam IEEE80211_NODE_LOCK(nt); 1552147118Ssam /* 1553147118Ssam * A mac address that is all zero means match only the ssid; 1554147118Ssam * otherwise we must match both. 1555147118Ssam */ 1556147118Ssam if (IEEE80211_ADDR_EQ(macaddr, zeromac)) { 1557147118Ssam TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 1558147118Ssam if (MATCH_SSID(ni, ssid, ssidlen)) 1559147118Ssam break; 1560147118Ssam } 1561147118Ssam } else { 1562147118Ssam hash = IEEE80211_NODE_HASH(macaddr); 1563147118Ssam LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1564147118Ssam if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr) && 1565147118Ssam MATCH_SSID(ni, ssid, ssidlen)) 1566147118Ssam break; 1567147118Ssam } 1568147118Ssam } 1569147118Ssam if (ni != NULL) { 1570147118Ssam ieee80211_ref_node(ni); /* mark referenced */ 1571147118Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1572138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1573147118Ssam "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1574147118Ssam func, line, 1575138568Ssam#else 1576147118Ssam "%s %p<%s> refcnt %d\n", __func__, 1577138568Ssam#endif 1578147118Ssam ni, ether_sprintf(ni->ni_macaddr), 1579147118Ssam ieee80211_node_refcnt(ni)); 1580138568Ssam } 1581138568Ssam IEEE80211_NODE_UNLOCK(nt); 1582138568Ssam return ni; 1583147118Ssam#undef MATCH_SSID 1584138568Ssam} 1585138568Ssam 1586116742Ssamstatic void 1587138568Ssam_ieee80211_free_node(struct ieee80211_node *ni) 1588116742Ssam{ 1589138568Ssam struct ieee80211com *ic = ni->ni_ic; 1590138568Ssam struct ieee80211_node_table *nt = ni->ni_table; 1591119150Ssam 1592138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1593140766Ssam "%s %p<%s> in %s table\n", __func__, ni, 1594140766Ssam ether_sprintf(ni->ni_macaddr), 1595138568Ssam nt != NULL ? nt->nt_name : "<gone>"); 1596138568Ssam 1597138568Ssam IEEE80211_AID_CLR(ni->ni_associd, ic->ic_aid_bitmap); 1598138568Ssam if (nt != NULL) { 1599138568Ssam TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1600138568Ssam LIST_REMOVE(ni, ni_hash); 1601138568Ssam } 1602138568Ssam ic->ic_node_free(ni); 1603116742Ssam} 1604116742Ssam 1605116742Ssamvoid 1606138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1607138568Ssamieee80211_free_node_debug(struct ieee80211_node *ni, const char *func, int line) 1608138568Ssam#else 1609138568Ssamieee80211_free_node(struct ieee80211_node *ni) 1610138568Ssam#endif 1611116742Ssam{ 1612138568Ssam struct ieee80211_node_table *nt = ni->ni_table; 1613119150Ssam 1614138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1615140454Ssam IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE, 1616140766Ssam "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni, 1617138568Ssam ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1); 1618138568Ssam#endif 1619148863Ssam if (nt != NULL) { 1620148863Ssam IEEE80211_NODE_LOCK(nt); 1621148863Ssam if (ieee80211_node_dectestref(ni)) { 1622148863Ssam /* 1623148863Ssam * Last reference, reclaim state. 1624148863Ssam */ 1625138568Ssam _ieee80211_free_node(ni); 1626148863Ssam } else if (ieee80211_node_refcnt(ni) == 1 && 1627148863Ssam nt->nt_keyixmap != NULL) { 1628148863Ssam ieee80211_keyix keyix; 1629148863Ssam /* 1630148863Ssam * Check for a last reference in the key mapping table. 1631148863Ssam */ 1632148863Ssam keyix = ni->ni_ucastkey.wk_rxkeyix; 1633148863Ssam if (keyix < nt->nt_keyixmax && 1634148863Ssam nt->nt_keyixmap[keyix] == ni) { 1635148863Ssam IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE, 1636148863Ssam "%s: %p<%s> clear key map entry", __func__, 1637148863Ssam ni, ether_sprintf(ni->ni_macaddr)); 1638148863Ssam nt->nt_keyixmap[keyix] = NULL; 1639148863Ssam ieee80211_node_decref(ni); /* XXX needed? */ 1640148863Ssam _ieee80211_free_node(ni); 1641148863Ssam } 1642148863Ssam } 1643148863Ssam IEEE80211_NODE_UNLOCK(nt); 1644148863Ssam } else { 1645148863Ssam if (ieee80211_node_dectestref(ni)) 1646138568Ssam _ieee80211_free_node(ni); 1647116742Ssam } 1648116742Ssam} 1649116742Ssam 1650138568Ssam/* 1651148863Ssam * Reclaim a unicast key and clear any key cache state. 1652148863Ssam */ 1653148863Ssamint 1654148863Ssamieee80211_node_delucastkey(struct ieee80211_node *ni) 1655148863Ssam{ 1656148863Ssam struct ieee80211com *ic = ni->ni_ic; 1657148863Ssam struct ieee80211_node_table *nt = &ic->ic_sta; 1658148863Ssam struct ieee80211_node *nikey; 1659148863Ssam ieee80211_keyix keyix; 1660148863Ssam int isowned, status; 1661148863Ssam 1662148863Ssam /* 1663148863Ssam * NB: We must beware of LOR here; deleting the key 1664148863Ssam * can cause the crypto layer to block traffic updates 1665148863Ssam * which can generate a LOR against the node table lock; 1666148863Ssam * grab it here and stash the key index for our use below. 1667148863Ssam * 1668148863Ssam * Must also beware of recursion on the node table lock. 1669148863Ssam * When called from node_cleanup we may already have 1670148863Ssam * the node table lock held. Unfortunately there's no 1671148863Ssam * way to separate out this path so we must do this 1672148863Ssam * conditionally. 1673148863Ssam */ 1674148863Ssam isowned = IEEE80211_NODE_IS_LOCKED(nt); 1675148863Ssam if (!isowned) 1676148863Ssam IEEE80211_NODE_LOCK(nt); 1677148863Ssam keyix = ni->ni_ucastkey.wk_rxkeyix; 1678148863Ssam status = ieee80211_crypto_delkey(ic, &ni->ni_ucastkey); 1679148863Ssam if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) { 1680148863Ssam nikey = nt->nt_keyixmap[keyix]; 1681148863Ssam nt->nt_keyixmap[keyix] = NULL;; 1682148863Ssam } else 1683148863Ssam nikey = NULL; 1684148863Ssam if (!isowned) 1685148863Ssam IEEE80211_NODE_UNLOCK(&ic->ic_sta); 1686148863Ssam 1687148863Ssam if (nikey != NULL) { 1688148863Ssam KASSERT(nikey == ni, 1689148863Ssam ("key map out of sync, ni %p nikey %p", ni, nikey)); 1690148863Ssam IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE, 1691148863Ssam "%s: delete key map entry %p<%s> refcnt %d\n", 1692148863Ssam __func__, ni, ether_sprintf(ni->ni_macaddr), 1693148863Ssam ieee80211_node_refcnt(ni)-1); 1694148863Ssam ieee80211_free_node(ni); 1695148863Ssam } 1696148863Ssam return status; 1697148863Ssam} 1698148863Ssam 1699148863Ssam/* 1700138568Ssam * Reclaim a node. If this is the last reference count then 1701138568Ssam * do the normal free work. Otherwise remove it from the node 1702138568Ssam * table and mark it gone by clearing the back-reference. 1703138568Ssam */ 1704138568Ssamstatic void 1705138568Ssamnode_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 1706116742Ssam{ 1707148863Ssam ieee80211_keyix keyix; 1708138568Ssam 1709148863Ssam IEEE80211_NODE_LOCK_ASSERT(nt); 1710148863Ssam 1711140766Ssam IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE, 1712140766Ssam "%s: remove %p<%s> from %s table, refcnt %d\n", 1713140766Ssam __func__, ni, ether_sprintf(ni->ni_macaddr), 1714140766Ssam nt->nt_name, ieee80211_node_refcnt(ni)-1); 1715148863Ssam /* 1716148863Ssam * Clear any entry in the unicast key mapping table. 1717148863Ssam * We need to do it here so rx lookups don't find it 1718148863Ssam * in the mapping table even if it's not in the hash 1719148863Ssam * table. We cannot depend on the mapping table entry 1720148863Ssam * being cleared because the node may not be free'd. 1721148863Ssam */ 1722148863Ssam keyix = ni->ni_ucastkey.wk_rxkeyix; 1723148863Ssam if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax && 1724148863Ssam nt->nt_keyixmap[keyix] == ni) { 1725148863Ssam IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE, 1726148863Ssam "%s: %p<%s> clear key map entry\n", 1727148863Ssam __func__, ni, ether_sprintf(ni->ni_macaddr)); 1728148863Ssam nt->nt_keyixmap[keyix] = NULL; 1729148863Ssam ieee80211_node_decref(ni); /* NB: don't need free */ 1730148863Ssam } 1731138568Ssam if (!ieee80211_node_dectestref(ni)) { 1732138568Ssam /* 1733138568Ssam * Other references are present, just remove the 1734138568Ssam * node from the table so it cannot be found. When 1735138568Ssam * the references are dropped storage will be 1736140753Ssam * reclaimed. 1737138568Ssam */ 1738138568Ssam TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1739138568Ssam LIST_REMOVE(ni, ni_hash); 1740138568Ssam ni->ni_table = NULL; /* clear reference */ 1741138568Ssam } else 1742138568Ssam _ieee80211_free_node(ni); 1743138568Ssam} 1744138568Ssam 1745138568Ssamstatic void 1746138568Ssamieee80211_free_allnodes_locked(struct ieee80211_node_table *nt) 1747138568Ssam{ 1748138568Ssam struct ieee80211com *ic = nt->nt_ic; 1749116742Ssam struct ieee80211_node *ni; 1750116742Ssam 1751138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1752138568Ssam "%s: free all nodes in %s table\n", __func__, nt->nt_name); 1753138568Ssam 1754138568Ssam while ((ni = TAILQ_FIRST(&nt->nt_node)) != NULL) { 1755138568Ssam if (ni->ni_associd != 0) { 1756138568Ssam if (ic->ic_auth->ia_node_leave != NULL) 1757138568Ssam ic->ic_auth->ia_node_leave(ic, ni); 1758138568Ssam IEEE80211_AID_CLR(ni->ni_associd, ic->ic_aid_bitmap); 1759138568Ssam } 1760138568Ssam node_reclaim(nt, ni); 1761138568Ssam } 1762138568Ssam ieee80211_reset_erp(ic); 1763116742Ssam} 1764116742Ssam 1765138568Ssamstatic void 1766138568Ssamieee80211_free_allnodes(struct ieee80211_node_table *nt) 1767138568Ssam{ 1768138568Ssam 1769138568Ssam IEEE80211_NODE_LOCK(nt); 1770138568Ssam ieee80211_free_allnodes_locked(nt); 1771138568Ssam IEEE80211_NODE_UNLOCK(nt); 1772138568Ssam} 1773138568Ssam 1774120483Ssam/* 1775138568Ssam * Timeout entries in the scan cache. 1776138568Ssam */ 1777138568Ssamstatic void 1778138568Ssamieee80211_timeout_scan_candidates(struct ieee80211_node_table *nt) 1779138568Ssam{ 1780138568Ssam struct ieee80211com *ic = nt->nt_ic; 1781138568Ssam struct ieee80211_node *ni, *tni; 1782138568Ssam 1783138568Ssam IEEE80211_NODE_LOCK(nt); 1784138568Ssam ni = ic->ic_bss; 1785138568Ssam /* XXX belongs elsewhere */ 1786138568Ssam if (ni->ni_rxfrag[0] != NULL && ticks > ni->ni_rxfragstamp + hz) { 1787138568Ssam m_freem(ni->ni_rxfrag[0]); 1788138568Ssam ni->ni_rxfrag[0] = NULL; 1789138568Ssam } 1790138568Ssam TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, tni) { 1791138568Ssam if (ni->ni_inact && --ni->ni_inact == 0) { 1792138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1793138568Ssam "[%s] scan candidate purged from cache " 1794138568Ssam "(refcnt %u)\n", ether_sprintf(ni->ni_macaddr), 1795140766Ssam ieee80211_node_refcnt(ni)); 1796138568Ssam node_reclaim(nt, ni); 1797138568Ssam } 1798138568Ssam } 1799138568Ssam IEEE80211_NODE_UNLOCK(nt); 1800138568Ssam 1801138568Ssam nt->nt_inact_timer = IEEE80211_INACT_WAIT; 1802138568Ssam} 1803138568Ssam 1804138568Ssam/* 1805138568Ssam * Timeout inactive stations and do related housekeeping. 1806138568Ssam * Note that we cannot hold the node lock while sending a 1807138568Ssam * frame as this would lead to a LOR. Instead we use a 1808138568Ssam * generation number to mark nodes that we've scanned and 1809138568Ssam * drop the lock and restart a scan if we have to time out 1810138568Ssam * a node. Since we are single-threaded by virtue of 1811120483Ssam * controlling the inactivity timer we can be sure this will 1812120483Ssam * process each node only once. 1813120483Ssam */ 1814138568Ssamstatic void 1815138568Ssamieee80211_timeout_stations(struct ieee80211_node_table *nt) 1816116742Ssam{ 1817138568Ssam struct ieee80211com *ic = nt->nt_ic; 1818120483Ssam struct ieee80211_node *ni; 1819138568Ssam u_int gen; 1820148320Ssam int isadhoc; 1821116742Ssam 1822148320Ssam isadhoc = (ic->ic_opmode == IEEE80211_M_IBSS || 1823148320Ssam ic->ic_opmode == IEEE80211_M_AHDEMO); 1824138568Ssam IEEE80211_SCAN_LOCK(nt); 1825154532Ssam gen = ++nt->nt_scangen; 1826138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1827140766Ssam "%s: %s scangen %u\n", __func__, nt->nt_name, gen); 1828120483Ssamrestart: 1829138568Ssam IEEE80211_NODE_LOCK(nt); 1830138568Ssam TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 1831120483Ssam if (ni->ni_scangen == gen) /* previously handled */ 1832120483Ssam continue; 1833120483Ssam ni->ni_scangen = gen; 1834138568Ssam /* 1835147788Ssam * Ignore entries for which have yet to receive an 1836147788Ssam * authentication frame. These are transient and 1837147788Ssam * will be reclaimed when the last reference to them 1838147788Ssam * goes away (when frame xmits complete). 1839147788Ssam */ 1840148323Ssam if (ic->ic_opmode == IEEE80211_M_HOSTAP && 1841148323Ssam (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 1842147788Ssam continue; 1843147788Ssam /* 1844138568Ssam * Free fragment if not needed anymore 1845138568Ssam * (last fragment older than 1s). 1846138568Ssam * XXX doesn't belong here 1847138568Ssam */ 1848138568Ssam if (ni->ni_rxfrag[0] != NULL && 1849138568Ssam ticks > ni->ni_rxfragstamp + hz) { 1850138568Ssam m_freem(ni->ni_rxfrag[0]); 1851138568Ssam ni->ni_rxfrag[0] = NULL; 1852138568Ssam } 1853140498Ssam /* 1854140498Ssam * Special case ourself; we may be idle for extended periods 1855140498Ssam * of time and regardless reclaiming our state is wrong. 1856140498Ssam */ 1857140498Ssam if (ni == ic->ic_bss) 1858140498Ssam continue; 1859138568Ssam ni->ni_inact--; 1860148320Ssam if (ni->ni_associd != 0 || isadhoc) { 1861119150Ssam /* 1862138568Ssam * Age frames on the power save queue. The 1863138568Ssam * aging interval is 4 times the listen 1864138568Ssam * interval specified by the station. This 1865138568Ssam * number is factored into the age calculations 1866138568Ssam * when the frame is placed on the queue. We 1867138568Ssam * store ages as time differences we can check 1868138568Ssam * and/or adjust only the head of the list. 1869138568Ssam */ 1870138568Ssam if (IEEE80211_NODE_SAVEQ_QLEN(ni) != 0) { 1871138568Ssam struct mbuf *m; 1872138568Ssam int discard = 0; 1873138568Ssam 1874138568Ssam IEEE80211_NODE_SAVEQ_LOCK(ni); 1875138568Ssam while (IF_POLL(&ni->ni_savedq, m) != NULL && 1876138568Ssam M_AGE_GET(m) < IEEE80211_INACT_WAIT) { 1877138568SsamIEEE80211_DPRINTF(ic, IEEE80211_MSG_POWER, "[%s] discard frame, age %u\n", ether_sprintf(ni->ni_macaddr), M_AGE_GET(m));/*XXX*/ 1878138568Ssam _IEEE80211_NODE_SAVEQ_DEQUEUE_HEAD(ni, m); 1879138568Ssam m_freem(m); 1880138568Ssam discard++; 1881138568Ssam } 1882138568Ssam if (m != NULL) 1883138568Ssam M_AGE_SUB(m, IEEE80211_INACT_WAIT); 1884138568Ssam IEEE80211_NODE_SAVEQ_UNLOCK(ni); 1885138568Ssam 1886138568Ssam if (discard != 0) { 1887138568Ssam IEEE80211_DPRINTF(ic, 1888138568Ssam IEEE80211_MSG_POWER, 1889138568Ssam "[%s] discard %u frames for age\n", 1890138568Ssam ether_sprintf(ni->ni_macaddr), 1891138568Ssam discard); 1892138568Ssam IEEE80211_NODE_STAT_ADD(ni, 1893138568Ssam ps_discard, discard); 1894138568Ssam if (IEEE80211_NODE_SAVEQ_QLEN(ni) == 0) 1895148304Ssam ic->ic_set_tim(ni, 0); 1896138568Ssam } 1897138568Ssam } 1898138568Ssam /* 1899138568Ssam * Probe the station before time it out. We 1900138568Ssam * send a null data frame which may not be 1901138568Ssam * universally supported by drivers (need it 1902138568Ssam * for ps-poll support so it should be...). 1903138568Ssam */ 1904139528Ssam if (0 < ni->ni_inact && 1905139528Ssam ni->ni_inact <= ic->ic_inact_probe) { 1906148320Ssam IEEE80211_NOTE(ic, 1907148320Ssam IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, 1908148320Ssam ni, "%s", 1909148320Ssam "probe station due to inactivity"); 1910148582Ssam /* 1911148582Ssam * Grab a reference before unlocking the table 1912148582Ssam * so the node cannot be reclaimed before we 1913148582Ssam * send the frame. ieee80211_send_nulldata 1914148582Ssam * understands we've done this and reclaims the 1915148582Ssam * ref for us as needed. 1916148582Ssam */ 1917148582Ssam ieee80211_ref_node(ni); 1918138568Ssam IEEE80211_NODE_UNLOCK(nt); 1919148301Ssam ieee80211_send_nulldata(ni); 1920138568Ssam /* XXX stat? */ 1921138568Ssam goto restart; 1922138568Ssam } 1923138568Ssam } 1924138568Ssam if (ni->ni_inact <= 0) { 1925148320Ssam IEEE80211_NOTE(ic, 1926148320Ssam IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, ni, 1927148320Ssam "station timed out due to inactivity " 1928148320Ssam "(refcnt %u)", ieee80211_node_refcnt(ni)); 1929138568Ssam /* 1930138568Ssam * Send a deauthenticate frame and drop the station. 1931138568Ssam * This is somewhat complicated due to reference counts 1932138568Ssam * and locking. At this point a station will typically 1933138568Ssam * have a reference count of 1. ieee80211_node_leave 1934138568Ssam * will do a "free" of the node which will drop the 1935138568Ssam * reference count. But in the meantime a reference 1936138568Ssam * wil be held by the deauth frame. The actual reclaim 1937138568Ssam * of the node will happen either after the tx is 1938138568Ssam * completed or by ieee80211_node_leave. 1939120483Ssam * 1940138568Ssam * Separately we must drop the node lock before sending 1941138568Ssam * in case the driver takes a lock, as this will result 1942138568Ssam * in LOR between the node lock and the driver lock. 1943119150Ssam */ 1944138568Ssam IEEE80211_NODE_UNLOCK(nt); 1945138568Ssam if (ni->ni_associd != 0) { 1946138568Ssam IEEE80211_SEND_MGMT(ic, ni, 1947138568Ssam IEEE80211_FC0_SUBTYPE_DEAUTH, 1948138568Ssam IEEE80211_REASON_AUTH_EXPIRE); 1949138568Ssam } 1950138568Ssam ieee80211_node_leave(ic, ni); 1951121180Ssam ic->ic_stats.is_node_timeout++; 1952120483Ssam goto restart; 1953120483Ssam } 1954116742Ssam } 1955138568Ssam IEEE80211_NODE_UNLOCK(nt); 1956138568Ssam 1957138568Ssam IEEE80211_SCAN_UNLOCK(nt); 1958138568Ssam 1959138568Ssam nt->nt_inact_timer = IEEE80211_INACT_WAIT; 1960116742Ssam} 1961116742Ssam 1962116742Ssamvoid 1963138568Ssamieee80211_iterate_nodes(struct ieee80211_node_table *nt, ieee80211_iter_func *f, void *arg) 1964116742Ssam{ 1965116742Ssam struct ieee80211_node *ni; 1966138568Ssam u_int gen; 1967116742Ssam 1968138568Ssam IEEE80211_SCAN_LOCK(nt); 1969154532Ssam gen = ++nt->nt_scangen; 1970138568Ssamrestart: 1971138568Ssam IEEE80211_NODE_LOCK(nt); 1972138568Ssam TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 1973138568Ssam if (ni->ni_scangen != gen) { 1974138568Ssam ni->ni_scangen = gen; 1975138568Ssam (void) ieee80211_ref_node(ni); 1976138568Ssam IEEE80211_NODE_UNLOCK(nt); 1977138568Ssam (*f)(arg, ni); 1978138568Ssam ieee80211_free_node(ni); 1979138568Ssam goto restart; 1980138568Ssam } 1981138568Ssam } 1982138568Ssam IEEE80211_NODE_UNLOCK(nt); 1983138568Ssam 1984138568Ssam IEEE80211_SCAN_UNLOCK(nt); 1985116742Ssam} 1986138568Ssam 1987138568Ssamvoid 1988138568Ssamieee80211_dump_node(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 1989138568Ssam{ 1990138568Ssam printf("0x%p: mac %s refcnt %d\n", ni, 1991138568Ssam ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)); 1992138568Ssam printf("\tscangen %u authmode %u flags 0x%x\n", 1993138568Ssam ni->ni_scangen, ni->ni_authmode, ni->ni_flags); 1994138568Ssam printf("\tassocid 0x%x txpower %u vlan %u\n", 1995138568Ssam ni->ni_associd, ni->ni_txpower, ni->ni_vlan); 1996138568Ssam printf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n", 1997138568Ssam ni->ni_txseqs[0], 1998138568Ssam ni->ni_rxseqs[0] >> IEEE80211_SEQ_SEQ_SHIFT, 1999138568Ssam ni->ni_rxseqs[0] & IEEE80211_SEQ_FRAG_MASK, 2000138568Ssam ni->ni_rxfragstamp); 2001138568Ssam printf("\trstamp %u rssi %u intval %u capinfo 0x%x\n", 2002138568Ssam ni->ni_rstamp, ni->ni_rssi, ni->ni_intval, ni->ni_capinfo); 2003138568Ssam printf("\tbssid %s essid \"%.*s\" channel %u:0x%x\n", 2004138568Ssam ether_sprintf(ni->ni_bssid), 2005138568Ssam ni->ni_esslen, ni->ni_essid, 2006138568Ssam ni->ni_chan->ic_freq, ni->ni_chan->ic_flags); 2007138568Ssam printf("\tfails %u inact %u txrate %u\n", 2008138568Ssam ni->ni_fails, ni->ni_inact, ni->ni_txrate); 2009138568Ssam} 2010138568Ssam 2011138568Ssamvoid 2012138568Ssamieee80211_dump_nodes(struct ieee80211_node_table *nt) 2013138568Ssam{ 2014138568Ssam ieee80211_iterate_nodes(nt, 2015138568Ssam (ieee80211_iter_func *) ieee80211_dump_node, nt); 2016138568Ssam} 2017138568Ssam 2018138568Ssam/* 2019138568Ssam * Handle a station joining an 11g network. 2020138568Ssam */ 2021138568Ssamstatic void 2022138568Ssamieee80211_node_join_11g(struct ieee80211com *ic, struct ieee80211_node *ni) 2023138568Ssam{ 2024138568Ssam 2025138568Ssam /* 2026138568Ssam * Station isn't capable of short slot time. Bump 2027138568Ssam * the count of long slot time stations and disable 2028138568Ssam * use of short slot time. Note that the actual switch 2029138568Ssam * over to long slot time use may not occur until the 2030138568Ssam * next beacon transmission (per sec. 7.3.1.4 of 11g). 2031138568Ssam */ 2032138568Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2033138568Ssam ic->ic_longslotsta++; 2034138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 2035138568Ssam "[%s] station needs long slot time, count %d\n", 2036138568Ssam ether_sprintf(ni->ni_macaddr), ic->ic_longslotsta); 2037138568Ssam /* XXX vap's w/ conflicting needs won't work */ 2038138568Ssam ieee80211_set_shortslottime(ic, 0); 2039138568Ssam } 2040138568Ssam /* 2041138568Ssam * If the new station is not an ERP station 2042138568Ssam * then bump the counter and enable protection 2043138568Ssam * if configured. 2044138568Ssam */ 2045138568Ssam if (!ieee80211_iserp_rateset(ic, &ni->ni_rates)) { 2046138568Ssam ic->ic_nonerpsta++; 2047138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 2048138568Ssam "[%s] station is !ERP, %d non-ERP stations associated\n", 2049138568Ssam ether_sprintf(ni->ni_macaddr), ic->ic_nonerpsta); 2050138568Ssam /* 2051138568Ssam * If protection is configured, enable it. 2052138568Ssam */ 2053138568Ssam if (ic->ic_protmode != IEEE80211_PROT_NONE) { 2054138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 2055138568Ssam "%s: enable use of protection\n", __func__); 2056138568Ssam ic->ic_flags |= IEEE80211_F_USEPROT; 2057138568Ssam } 2058138568Ssam /* 2059138568Ssam * If station does not support short preamble 2060138568Ssam * then we must enable use of Barker preamble. 2061138568Ssam */ 2062138568Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) { 2063138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 2064138568Ssam "[%s] station needs long preamble\n", 2065138568Ssam ether_sprintf(ni->ni_macaddr)); 2066138568Ssam ic->ic_flags |= IEEE80211_F_USEBARKER; 2067138568Ssam ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; 2068138568Ssam } 2069153973Ssam if (ic->ic_nonerpsta == 1) 2070153973Ssam ic->ic_flags_ext |= IEEE80211_FEXT_ERPUPDATE; 2071138568Ssam } else 2072138568Ssam ni->ni_flags |= IEEE80211_NODE_ERP; 2073138568Ssam} 2074138568Ssam 2075138568Ssamvoid 2076138568Ssamieee80211_node_join(struct ieee80211com *ic, struct ieee80211_node *ni, int resp) 2077138568Ssam{ 2078138568Ssam int newassoc; 2079138568Ssam 2080138568Ssam if (ni->ni_associd == 0) { 2081138568Ssam u_int16_t aid; 2082138568Ssam 2083138568Ssam /* 2084138568Ssam * It would be good to search the bitmap 2085138568Ssam * more efficiently, but this will do for now. 2086138568Ssam */ 2087138568Ssam for (aid = 1; aid < ic->ic_max_aid; aid++) { 2088138568Ssam if (!IEEE80211_AID_ISSET(aid, 2089138568Ssam ic->ic_aid_bitmap)) 2090138568Ssam break; 2091138568Ssam } 2092138568Ssam if (aid >= ic->ic_max_aid) { 2093138568Ssam IEEE80211_SEND_MGMT(ic, ni, resp, 2094138568Ssam IEEE80211_REASON_ASSOC_TOOMANY); 2095138568Ssam ieee80211_node_leave(ic, ni); 2096138568Ssam return; 2097138568Ssam } 2098138568Ssam ni->ni_associd = aid | 0xc000; 2099138568Ssam IEEE80211_AID_SET(ni->ni_associd, ic->ic_aid_bitmap); 2100138568Ssam ic->ic_sta_assoc++; 2101138568Ssam newassoc = 1; 2102149031Ssam if (ic->ic_curmode == IEEE80211_MODE_11G) 2103138568Ssam ieee80211_node_join_11g(ic, ni); 2104138568Ssam } else 2105138568Ssam newassoc = 0; 2106138568Ssam 2107138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, 2108139523Ssam "[%s] station %sassociated at aid %d: %s preamble, %s slot time%s%s\n", 2109139523Ssam ether_sprintf(ni->ni_macaddr), newassoc ? "" : "re", 2110139523Ssam IEEE80211_NODE_AID(ni), 2111139523Ssam ic->ic_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long", 2112139523Ssam ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long", 2113139523Ssam ic->ic_flags & IEEE80211_F_USEPROT ? ", protection" : "", 2114139523Ssam ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "" 2115139523Ssam ); 2116138568Ssam 2117138568Ssam /* give driver a chance to setup state like ni_txrate */ 2118139524Ssam if (ic->ic_newassoc != NULL) 2119148307Ssam ic->ic_newassoc(ni, newassoc); 2120139528Ssam ni->ni_inact_reload = ic->ic_inact_auth; 2121139528Ssam ni->ni_inact = ni->ni_inact_reload; 2122138568Ssam IEEE80211_SEND_MGMT(ic, ni, resp, IEEE80211_STATUS_SUCCESS); 2123138568Ssam /* tell the authenticator about new station */ 2124138568Ssam if (ic->ic_auth->ia_node_join != NULL) 2125138568Ssam ic->ic_auth->ia_node_join(ic, ni); 2126138568Ssam ieee80211_notify_node_join(ic, ni, newassoc); 2127138568Ssam} 2128138568Ssam 2129138568Ssam/* 2130138568Ssam * Handle a station leaving an 11g network. 2131138568Ssam */ 2132138568Ssamstatic void 2133138568Ssamieee80211_node_leave_11g(struct ieee80211com *ic, struct ieee80211_node *ni) 2134138568Ssam{ 2135138568Ssam 2136149031Ssam KASSERT(ic->ic_curmode == IEEE80211_MODE_11G, 2137148941Ssam ("not in 11g, bss %u:0x%x, curmode %u", ni->ni_chan->ic_freq, 2138148941Ssam ni->ni_chan->ic_flags, ic->ic_curmode)); 2139138568Ssam 2140138568Ssam /* 2141138568Ssam * If a long slot station do the slot time bookkeeping. 2142138568Ssam */ 2143138568Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2144138568Ssam KASSERT(ic->ic_longslotsta > 0, 2145138568Ssam ("bogus long slot station count %d", ic->ic_longslotsta)); 2146138568Ssam ic->ic_longslotsta--; 2147138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 2148138568Ssam "[%s] long slot time station leaves, count now %d\n", 2149138568Ssam ether_sprintf(ni->ni_macaddr), ic->ic_longslotsta); 2150138568Ssam if (ic->ic_longslotsta == 0) { 2151138568Ssam /* 2152138568Ssam * Re-enable use of short slot time if supported 2153138568Ssam * and not operating in IBSS mode (per spec). 2154138568Ssam */ 2155138568Ssam if ((ic->ic_caps & IEEE80211_C_SHSLOT) && 2156138568Ssam ic->ic_opmode != IEEE80211_M_IBSS) { 2157138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 2158138568Ssam "%s: re-enable use of short slot time\n", 2159138568Ssam __func__); 2160138568Ssam ieee80211_set_shortslottime(ic, 1); 2161138568Ssam } 2162138568Ssam } 2163138568Ssam } 2164138568Ssam /* 2165138568Ssam * If a non-ERP station do the protection-related bookkeeping. 2166138568Ssam */ 2167138568Ssam if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) { 2168138568Ssam KASSERT(ic->ic_nonerpsta > 0, 2169138568Ssam ("bogus non-ERP station count %d", ic->ic_nonerpsta)); 2170138568Ssam ic->ic_nonerpsta--; 2171138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 2172138568Ssam "[%s] non-ERP station leaves, count now %d\n", 2173138568Ssam ether_sprintf(ni->ni_macaddr), ic->ic_nonerpsta); 2174138568Ssam if (ic->ic_nonerpsta == 0) { 2175138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 2176138568Ssam "%s: disable use of protection\n", __func__); 2177138568Ssam ic->ic_flags &= ~IEEE80211_F_USEPROT; 2178138568Ssam /* XXX verify mode? */ 2179138568Ssam if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) { 2180138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 2181138568Ssam "%s: re-enable use of short preamble\n", 2182138568Ssam __func__); 2183138568Ssam ic->ic_flags |= IEEE80211_F_SHPREAMBLE; 2184138568Ssam ic->ic_flags &= ~IEEE80211_F_USEBARKER; 2185138568Ssam } 2186153973Ssam ic->ic_flags_ext |= IEEE80211_FEXT_ERPUPDATE; 2187138568Ssam } 2188138568Ssam } 2189138568Ssam} 2190138568Ssam 2191138568Ssam/* 2192138568Ssam * Handle bookkeeping for station deauthentication/disassociation 2193138568Ssam * when operating as an ap. 2194138568Ssam */ 2195138568Ssamvoid 2196138568Ssamieee80211_node_leave(struct ieee80211com *ic, struct ieee80211_node *ni) 2197138568Ssam{ 2198140499Ssam struct ieee80211_node_table *nt = ni->ni_table; 2199138568Ssam 2200138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, 2201138568Ssam "[%s] station with aid %d leaves\n", 2202138568Ssam ether_sprintf(ni->ni_macaddr), IEEE80211_NODE_AID(ni)); 2203138568Ssam 2204138568Ssam KASSERT(ic->ic_opmode == IEEE80211_M_HOSTAP || 2205138568Ssam ic->ic_opmode == IEEE80211_M_IBSS || 2206138568Ssam ic->ic_opmode == IEEE80211_M_AHDEMO, 2207138568Ssam ("unexpected operating mode %u", ic->ic_opmode)); 2208138568Ssam /* 2209138568Ssam * If node wasn't previously associated all 2210138568Ssam * we need to do is reclaim the reference. 2211138568Ssam */ 2212138568Ssam /* XXX ibss mode bypasses 11g and notification */ 2213138568Ssam if (ni->ni_associd == 0) 2214138568Ssam goto done; 2215138568Ssam /* 2216138568Ssam * Tell the authenticator the station is leaving. 2217138568Ssam * Note that we must do this before yanking the 2218138568Ssam * association id as the authenticator uses the 2219138568Ssam * associd to locate it's state block. 2220138568Ssam */ 2221138568Ssam if (ic->ic_auth->ia_node_leave != NULL) 2222138568Ssam ic->ic_auth->ia_node_leave(ic, ni); 2223138568Ssam IEEE80211_AID_CLR(ni->ni_associd, ic->ic_aid_bitmap); 2224138568Ssam ni->ni_associd = 0; 2225138568Ssam ic->ic_sta_assoc--; 2226138568Ssam 2227149031Ssam if (ic->ic_curmode == IEEE80211_MODE_11G) 2228138568Ssam ieee80211_node_leave_11g(ic, ni); 2229138568Ssam /* 2230138568Ssam * Cleanup station state. In particular clear various 2231138568Ssam * state that might otherwise be reused if the node 2232138568Ssam * is reused before the reference count goes to zero 2233138568Ssam * (and memory is reclaimed). 2234138568Ssam */ 2235138568Ssam ieee80211_sta_leave(ic, ni); 2236138568Ssamdone: 2237140499Ssam /* 2238140499Ssam * Remove the node from any table it's recorded in and 2239140499Ssam * drop the caller's reference. Removal from the table 2240140499Ssam * is important to insure the node is not reprocessed 2241140499Ssam * for inactivity. 2242140499Ssam */ 2243140499Ssam if (nt != NULL) { 2244140499Ssam IEEE80211_NODE_LOCK(nt); 2245140499Ssam node_reclaim(nt, ni); 2246140499Ssam IEEE80211_NODE_UNLOCK(nt); 2247140499Ssam } else 2248140499Ssam ieee80211_free_node(ni); 2249138568Ssam} 2250138568Ssam 2251138568Ssamu_int8_t 2252138568Ssamieee80211_getrssi(struct ieee80211com *ic) 2253138568Ssam{ 2254138568Ssam#define NZ(x) ((x) == 0 ? 1 : (x)) 2255140753Ssam struct ieee80211_node_table *nt = &ic->ic_sta; 2256138568Ssam u_int32_t rssi_samples, rssi_total; 2257138568Ssam struct ieee80211_node *ni; 2258138568Ssam 2259138568Ssam rssi_total = 0; 2260138568Ssam rssi_samples = 0; 2261138568Ssam switch (ic->ic_opmode) { 2262138568Ssam case IEEE80211_M_IBSS: /* average of all ibss neighbors */ 2263138568Ssam /* XXX locking */ 2264140753Ssam TAILQ_FOREACH(ni, &nt->nt_node, ni_list) 2265138568Ssam if (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) { 2266138568Ssam rssi_samples++; 2267138568Ssam rssi_total += ic->ic_node_getrssi(ni); 2268138568Ssam } 2269138568Ssam break; 2270138568Ssam case IEEE80211_M_AHDEMO: /* average of all neighbors */ 2271138568Ssam /* XXX locking */ 2272140753Ssam TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2273138568Ssam rssi_samples++; 2274138568Ssam rssi_total += ic->ic_node_getrssi(ni); 2275138568Ssam } 2276138568Ssam break; 2277138568Ssam case IEEE80211_M_HOSTAP: /* average of all associated stations */ 2278138568Ssam /* XXX locking */ 2279140753Ssam TAILQ_FOREACH(ni, &nt->nt_node, ni_list) 2280138568Ssam if (IEEE80211_AID(ni->ni_associd) != 0) { 2281138568Ssam rssi_samples++; 2282138568Ssam rssi_total += ic->ic_node_getrssi(ni); 2283138568Ssam } 2284138568Ssam break; 2285138568Ssam case IEEE80211_M_MONITOR: /* XXX */ 2286138568Ssam case IEEE80211_M_STA: /* use stats from associated ap */ 2287138568Ssam default: 2288138568Ssam if (ic->ic_bss != NULL) 2289138568Ssam rssi_total = ic->ic_node_getrssi(ic->ic_bss); 2290138568Ssam rssi_samples = 1; 2291138568Ssam break; 2292138568Ssam } 2293138568Ssam return rssi_total / NZ(rssi_samples); 2294138568Ssam#undef NZ 2295138568Ssam} 2296138568Ssam 2297138568Ssam/* 2298138568Ssam * Indicate whether there are frames queued for a station in power-save mode. 2299138568Ssam */ 2300138568Ssamstatic void 2301148304Ssamieee80211_set_tim(struct ieee80211_node *ni, int set) 2302138568Ssam{ 2303148304Ssam struct ieee80211com *ic = ni->ni_ic; 2304138568Ssam u_int16_t aid; 2305138568Ssam 2306138568Ssam KASSERT(ic->ic_opmode == IEEE80211_M_HOSTAP || 2307138568Ssam ic->ic_opmode == IEEE80211_M_IBSS, 2308138568Ssam ("operating mode %u", ic->ic_opmode)); 2309138568Ssam 2310138568Ssam aid = IEEE80211_AID(ni->ni_associd); 2311138568Ssam KASSERT(aid < ic->ic_max_aid, 2312138568Ssam ("bogus aid %u, max %u", aid, ic->ic_max_aid)); 2313138568Ssam 2314138568Ssam IEEE80211_BEACON_LOCK(ic); 2315138568Ssam if (set != (isset(ic->ic_tim_bitmap, aid) != 0)) { 2316138568Ssam if (set) { 2317138568Ssam setbit(ic->ic_tim_bitmap, aid); 2318138568Ssam ic->ic_ps_pending++; 2319138568Ssam } else { 2320138568Ssam clrbit(ic->ic_tim_bitmap, aid); 2321138568Ssam ic->ic_ps_pending--; 2322138568Ssam } 2323138568Ssam ic->ic_flags |= IEEE80211_F_TIMUPDATE; 2324138568Ssam } 2325138568Ssam IEEE80211_BEACON_UNLOCK(ic); 2326138568Ssam} 2327138568Ssam 2328138568Ssam/* 2329138568Ssam * Node table support. 2330138568Ssam */ 2331138568Ssam 2332138568Ssamstatic void 2333138568Ssamieee80211_node_table_init(struct ieee80211com *ic, 2334138568Ssam struct ieee80211_node_table *nt, 2335148863Ssam const char *name, int inact, int keyixmax, 2336138568Ssam void (*timeout)(struct ieee80211_node_table *)) 2337138568Ssam{ 2338138568Ssam 2339138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 2340138568Ssam "%s %s table, inact %u\n", __func__, name, inact); 2341138568Ssam 2342138568Ssam nt->nt_ic = ic; 2343138568Ssam /* XXX need unit */ 2344138568Ssam IEEE80211_NODE_LOCK_INIT(nt, ic->ic_ifp->if_xname); 2345138568Ssam IEEE80211_SCAN_LOCK_INIT(nt, ic->ic_ifp->if_xname); 2346138568Ssam TAILQ_INIT(&nt->nt_node); 2347138568Ssam nt->nt_name = name; 2348138568Ssam nt->nt_scangen = 1; 2349138568Ssam nt->nt_inact_init = inact; 2350138568Ssam nt->nt_timeout = timeout; 2351148863Ssam nt->nt_keyixmax = keyixmax; 2352148863Ssam if (nt->nt_keyixmax > 0) { 2353148863Ssam MALLOC(nt->nt_keyixmap, struct ieee80211_node **, 2354148863Ssam keyixmax * sizeof(struct ieee80211_node *), 2355148863Ssam M_80211_NODE, M_NOWAIT | M_ZERO); 2356148863Ssam if (nt->nt_keyixmap == NULL) 2357148863Ssam if_printf(ic->ic_ifp, 2358148863Ssam "Cannot allocate key index map with %u entries\n", 2359148863Ssam keyixmax); 2360148863Ssam } else 2361148863Ssam nt->nt_keyixmap = NULL; 2362138568Ssam} 2363138568Ssam 2364138568Ssamvoid 2365138568Ssamieee80211_node_table_reset(struct ieee80211_node_table *nt) 2366138568Ssam{ 2367138568Ssam 2368138568Ssam IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE, 2369138568Ssam "%s %s table\n", __func__, nt->nt_name); 2370138568Ssam 2371138568Ssam IEEE80211_NODE_LOCK(nt); 2372138568Ssam nt->nt_inact_timer = 0; 2373138568Ssam ieee80211_free_allnodes_locked(nt); 2374138568Ssam IEEE80211_NODE_UNLOCK(nt); 2375138568Ssam} 2376138568Ssam 2377138568Ssamstatic void 2378138568Ssamieee80211_node_table_cleanup(struct ieee80211_node_table *nt) 2379138568Ssam{ 2380138568Ssam 2381138568Ssam IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE, 2382138568Ssam "%s %s table\n", __func__, nt->nt_name); 2383138568Ssam 2384148863Ssam IEEE80211_NODE_LOCK(nt); 2385138568Ssam ieee80211_free_allnodes_locked(nt); 2386148863Ssam if (nt->nt_keyixmap != NULL) { 2387148863Ssam /* XXX verify all entries are NULL */ 2388148863Ssam int i; 2389148863Ssam for (i = 0; i < nt->nt_keyixmax; i++) 2390148863Ssam if (nt->nt_keyixmap[i] != NULL) 2391148863Ssam printf("%s: %s[%u] still active\n", __func__, 2392148863Ssam nt->nt_name, i); 2393148863Ssam FREE(nt->nt_keyixmap, M_80211_NODE); 2394148863Ssam nt->nt_keyixmap = NULL; 2395148863Ssam } 2396138568Ssam IEEE80211_SCAN_LOCK_DESTROY(nt); 2397138568Ssam IEEE80211_NODE_LOCK_DESTROY(nt); 2398138568Ssam} 2399