ieee80211_node.c revision 165887
1219820Sjeff/*- 2219820Sjeff * Copyright (c) 2001 Atsushi Onoe 3219820Sjeff * Copyright (c) 2002-2005 Sam Leffler, Errno Consulting 4219820Sjeff * All rights reserved. 5219820Sjeff * 6219820Sjeff * Redistribution and use in source and binary forms, with or without 7219820Sjeff * modification, are permitted provided that the following conditions 8219820Sjeff * are met: 9219820Sjeff * 1. Redistributions of source code must retain the above copyright 10219820Sjeff * notice, this list of conditions and the following disclaimer. 11219820Sjeff * 2. Redistributions in binary form must reproduce the above copyright 12219820Sjeff * notice, this list of conditions and the following disclaimer in the 13219820Sjeff * documentation and/or other materials provided with the distribution. 14219820Sjeff * 3. The name of the author may not be used to endorse or promote products 15219820Sjeff * derived from this software without specific prior written permission. 16219820Sjeff * 17219820Sjeff * Alternatively, this software may be distributed under the terms of the 18219820Sjeff * GNU General Public License ("GPL") version 2 as published by the Free 19219820Sjeff * Software Foundation. 20219820Sjeff * 21219820Sjeff * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22219820Sjeff * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23219820Sjeff * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24219820Sjeff * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25219820Sjeff * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26219820Sjeff * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27219820Sjeff * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28219820Sjeff * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29219820Sjeff * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30219820Sjeff * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31219820Sjeff */ 32219820Sjeff 33219820Sjeff#include <sys/cdefs.h> 34219820Sjeff__FBSDID("$FreeBSD: head/sys/net80211/ieee80211_node.c 165887 2007-01-08 17:24:51Z sam $"); 35219820Sjeff 36219820Sjeff#include <sys/param.h> 37219820Sjeff#include <sys/systm.h> 38219820Sjeff#include <sys/mbuf.h> 39219820Sjeff#include <sys/malloc.h> 40219820Sjeff#include <sys/kernel.h> 41219820Sjeff 42219820Sjeff#include <sys/socket.h> 43219820Sjeff 44219820Sjeff#include <net/if.h> 45219820Sjeff#include <net/if_media.h> 46219820Sjeff#include <net/ethernet.h> 47219820Sjeff 48219820Sjeff#include <net80211/ieee80211_var.h> 49219820Sjeff 50219820Sjeff#include <net/bpf.h> 51219820Sjeff 52219820Sjeff/* 53219820Sjeff * Association id's are managed with a bit vector. 54219820Sjeff */ 55219820Sjeff#define IEEE80211_AID_SET(b, w) \ 56219820Sjeff ((w)[IEEE80211_AID(b) / 32] |= (1 << (IEEE80211_AID(b) % 32))) 57219820Sjeff#define IEEE80211_AID_CLR(b, w) \ 58219820Sjeff ((w)[IEEE80211_AID(b) / 32] &= ~(1 << (IEEE80211_AID(b) % 32))) 59219820Sjeff#define IEEE80211_AID_ISSET(b, w) \ 60219820Sjeff ((w)[IEEE80211_AID(b) / 32] & (1 << (IEEE80211_AID(b) % 32))) 61219820Sjeff 62219820Sjeff#ifdef IEEE80211_DEBUG_REFCNT 63219820Sjeff#define REFCNT_LOC "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line 64219820Sjeff#else 65219820Sjeff#define REFCNT_LOC "%s %p<%s> refcnt %d\n", __func__ 66219820Sjeff#endif 67219820Sjeff 68219820Sjeffstatic struct ieee80211_node *node_alloc(struct ieee80211_node_table *); 69219820Sjeffstatic void node_cleanup(struct ieee80211_node *); 70219820Sjeffstatic void node_free(struct ieee80211_node *); 71219820Sjeffstatic u_int8_t node_getrssi(const struct ieee80211_node *); 72219820Sjeff 73219820Sjeffstatic void ieee80211_setup_node(struct ieee80211_node_table *, 74219820Sjeff struct ieee80211_node *, const u_int8_t *); 75219820Sjeffstatic void _ieee80211_free_node(struct ieee80211_node *); 76219820Sjeffstatic void ieee80211_free_allnodes(struct ieee80211_node_table *); 77219820Sjeff 78219820Sjeffstatic void ieee80211_timeout_scan_candidates(struct ieee80211_node_table *); 79219820Sjeffstatic void ieee80211_timeout_stations(struct ieee80211_node_table *); 80219820Sjeff 81219820Sjeffstatic void ieee80211_set_tim(struct ieee80211_node *, int set); 82219820Sjeff 83219820Sjeffstatic void ieee80211_node_table_init(struct ieee80211com *ic, 84219820Sjeff struct ieee80211_node_table *nt, const char *name, 85219820Sjeff int inact, int keyixmax, 86219820Sjeff void (*timeout)(struct ieee80211_node_table *)); 87219820Sjeffstatic void ieee80211_node_table_cleanup(struct ieee80211_node_table *nt); 88219820Sjeff 89219820SjeffMALLOC_DEFINE(M_80211_NODE, "80211node", "802.11 node state"); 90219820Sjeff 91219820Sjeffvoid 92219820Sjeffieee80211_node_attach(struct ieee80211com *ic) 93219820Sjeff{ 94219820Sjeff 95219820Sjeff ic->ic_node_alloc = node_alloc; 96219820Sjeff ic->ic_node_free = node_free; 97219820Sjeff ic->ic_node_cleanup = node_cleanup; 98219820Sjeff ic->ic_node_getrssi = node_getrssi; 99219820Sjeff 100219820Sjeff /* default station inactivity timer setings */ 101219820Sjeff ic->ic_inact_init = IEEE80211_INACT_INIT; 102219820Sjeff ic->ic_inact_auth = IEEE80211_INACT_AUTH; 103219820Sjeff ic->ic_inact_run = IEEE80211_INACT_RUN; 104219820Sjeff ic->ic_inact_probe = IEEE80211_INACT_PROBE; 105219820Sjeff 106219820Sjeff /* NB: driver should override */ 107219820Sjeff ic->ic_max_aid = IEEE80211_AID_DEF; 108219820Sjeff ic->ic_set_tim = ieee80211_set_tim; 109219820Sjeff} 110219820Sjeff 111219820Sjeffvoid 112219820Sjeffieee80211_node_lateattach(struct ieee80211com *ic) 113219820Sjeff{ 114219820Sjeff struct ieee80211_rsnparms *rsn; 115219820Sjeff 116219820Sjeff if (ic->ic_max_aid > IEEE80211_AID_MAX) 117219820Sjeff ic->ic_max_aid = IEEE80211_AID_MAX; 118219820Sjeff MALLOC(ic->ic_aid_bitmap, u_int32_t *, 119219820Sjeff howmany(ic->ic_max_aid, 32) * sizeof(u_int32_t), 120219820Sjeff M_DEVBUF, M_NOWAIT | M_ZERO); 121219820Sjeff if (ic->ic_aid_bitmap == NULL) { 122219820Sjeff /* XXX no way to recover */ 123219820Sjeff printf("%s: no memory for AID bitmap!\n", __func__); 124219820Sjeff ic->ic_max_aid = 0; 125219820Sjeff } 126219820Sjeff 127219820Sjeff /* XXX defer until using hostap/ibss mode */ 128219820Sjeff ic->ic_tim_len = howmany(ic->ic_max_aid, 8) * sizeof(u_int8_t); 129219820Sjeff MALLOC(ic->ic_tim_bitmap, u_int8_t *, ic->ic_tim_len, 130219820Sjeff M_DEVBUF, M_NOWAIT | M_ZERO); 131219820Sjeff if (ic->ic_tim_bitmap == NULL) { 132219820Sjeff /* XXX no way to recover */ 133219820Sjeff printf("%s: no memory for TIM bitmap!\n", __func__); 134219820Sjeff } 135219820Sjeff 136219820Sjeff ieee80211_node_table_init(ic, &ic->ic_sta, "station", 137219820Sjeff IEEE80211_INACT_INIT, ic->ic_crypto.cs_max_keyix, 138219820Sjeff ieee80211_timeout_stations); 139219820Sjeff ieee80211_node_table_init(ic, &ic->ic_scan, "scan", 140219820Sjeff IEEE80211_INACT_SCAN, 0, 141219820Sjeff ieee80211_timeout_scan_candidates); 142219820Sjeff 143219820Sjeff ieee80211_reset_bss(ic); 144219820Sjeff /* 145219820Sjeff * Setup "global settings" in the bss node so that 146219820Sjeff * each new station automatically inherits them. 147219820Sjeff */ 148219820Sjeff rsn = &ic->ic_bss->ni_rsn; 149219820Sjeff /* WEP, TKIP, and AES-CCM are always supported */ 150219820Sjeff rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_WEP; 151219820Sjeff rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_TKIP; 152219820Sjeff rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_AES_CCM; 153219820Sjeff if (ic->ic_caps & IEEE80211_C_AES) 154219820Sjeff rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_AES_OCB; 155219820Sjeff if (ic->ic_caps & IEEE80211_C_CKIP) 156219820Sjeff rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_CKIP; 157219820Sjeff /* 158219820Sjeff * Default unicast cipher to WEP for 802.1x use. If 159219820Sjeff * WPA is enabled the management code will set these 160219820Sjeff * values to reflect. 161219820Sjeff */ 162219820Sjeff rsn->rsn_ucastcipher = IEEE80211_CIPHER_WEP; 163219820Sjeff rsn->rsn_ucastkeylen = 104 / NBBY; 164219820Sjeff /* 165219820Sjeff * WPA says the multicast cipher is the lowest unicast 166219820Sjeff * cipher supported. But we skip WEP which would 167219820Sjeff * otherwise be used based on this criteria. 168219820Sjeff */ 169219820Sjeff rsn->rsn_mcastcipher = IEEE80211_CIPHER_TKIP; 170219820Sjeff rsn->rsn_mcastkeylen = 128 / NBBY; 171219820Sjeff 172219820Sjeff /* 173219820Sjeff * We support both WPA-PSK and 802.1x; the one used 174219820Sjeff * is determined by the authentication mode and the 175219820Sjeff * setting of the PSK state. 176219820Sjeff */ 177219820Sjeff rsn->rsn_keymgmtset = WPA_ASE_8021X_UNSPEC | WPA_ASE_8021X_PSK; 178219820Sjeff rsn->rsn_keymgmt = WPA_ASE_8021X_PSK; 179219820Sjeff 180219820Sjeff ic->ic_auth = ieee80211_authenticator_get(ic->ic_bss->ni_authmode); 181219820Sjeff} 182219820Sjeff 183219820Sjeffvoid 184219820Sjeffieee80211_node_detach(struct ieee80211com *ic) 185219820Sjeff{ 186219820Sjeff 187219820Sjeff if (ic->ic_bss != NULL) { 188219820Sjeff ieee80211_free_node(ic->ic_bss); 189219820Sjeff ic->ic_bss = NULL; 190219820Sjeff } 191219820Sjeff ieee80211_node_table_cleanup(&ic->ic_scan); 192219820Sjeff ieee80211_node_table_cleanup(&ic->ic_sta); 193219820Sjeff if (ic->ic_aid_bitmap != NULL) { 194219820Sjeff FREE(ic->ic_aid_bitmap, M_DEVBUF); 195219820Sjeff ic->ic_aid_bitmap = NULL; 196219820Sjeff } 197219820Sjeff if (ic->ic_tim_bitmap != NULL) { 198219820Sjeff FREE(ic->ic_tim_bitmap, M_DEVBUF); 199219820Sjeff ic->ic_tim_bitmap = NULL; 200219820Sjeff } 201219820Sjeff} 202219820Sjeff 203219820Sjeff/* 204219820Sjeff * Port authorize/unauthorize interfaces for use by an authenticator. 205219820Sjeff */ 206219820Sjeff 207219820Sjeffvoid 208219820Sjeffieee80211_node_authorize(struct ieee80211_node *ni) 209219820Sjeff{ 210219820Sjeff struct ieee80211com *ic = ni->ni_ic; 211219820Sjeff 212219820Sjeff ni->ni_flags |= IEEE80211_NODE_AUTH; 213219820Sjeff ni->ni_inact_reload = ic->ic_inact_run; 214219820Sjeff} 215219820Sjeff 216219820Sjeffvoid 217219820Sjeffieee80211_node_unauthorize(struct ieee80211_node *ni) 218219820Sjeff{ 219219820Sjeff ni->ni_flags &= ~IEEE80211_NODE_AUTH; 220219820Sjeff} 221219820Sjeff 222219820Sjeff/* 223219820Sjeff * Set/change the channel. The rate set is also updated as 224219820Sjeff * to insure a consistent view by drivers. 225219820Sjeff */ 226219820Sjeffstatic void 227219820Sjeffieee80211_set_chan(struct ieee80211com *ic, 228219820Sjeff struct ieee80211_node *ni, struct ieee80211_channel *chan) 229219820Sjeff{ 230219820Sjeff if (chan == IEEE80211_CHAN_ANYC) /* XXX while scanning */ 231219820Sjeff chan = ic->ic_curchan; 232219820Sjeff ni->ni_chan = chan; 233219820Sjeff ni->ni_rates = *ieee80211_get_suprates(ic, chan); 234219820Sjeff} 235219820Sjeff 236219820Sjeff/* 237219820Sjeff * AP scanning support. 238219820Sjeff */ 239219820Sjeff 240219820Sjeff#ifdef IEEE80211_DEBUG 241219820Sjeffstatic void 242219820Sjeffdump_chanlist(const u_char chans[]) 243219820Sjeff{ 244219820Sjeff const char *sep; 245219820Sjeff int i; 246219820Sjeff 247219820Sjeff sep = " "; 248219820Sjeff for (i = 0; i < IEEE80211_CHAN_MAX; i++) 249219820Sjeff if (isset(chans, i)) { 250219820Sjeff printf("%s%u", sep, i); 251219820Sjeff sep = ", "; 252219820Sjeff } 253219820Sjeff} 254219820Sjeff#endif /* IEEE80211_DEBUG */ 255219820Sjeff 256219820Sjeff/* 257219820Sjeff * Initialize the channel set to scan based on the 258219820Sjeff * of available channels and the current PHY mode. 259219820Sjeff */ 260219820Sjeffstatic void 261219820Sjeffieee80211_reset_scan(struct ieee80211com *ic) 262219820Sjeff{ 263219820Sjeff 264219820Sjeff /* XXX ic_des_chan should be handled with ic_chan_active */ 265219820Sjeff if (ic->ic_des_chan != IEEE80211_CHAN_ANYC) { 266219820Sjeff memset(ic->ic_chan_scan, 0, sizeof(ic->ic_chan_scan)); 267219820Sjeff setbit(ic->ic_chan_scan, 268219820Sjeff ieee80211_chan2ieee(ic, ic->ic_des_chan)); 269219820Sjeff } else 270219820Sjeff memcpy(ic->ic_chan_scan, ic->ic_chan_active, 271219820Sjeff sizeof(ic->ic_chan_active)); 272219820Sjeff#ifdef IEEE80211_DEBUG 273219820Sjeff if (ieee80211_msg_scan(ic)) { 274219820Sjeff printf("%s: scan set:", __func__); 275219820Sjeff dump_chanlist(ic->ic_chan_scan); 276219820Sjeff printf(" start chan %u\n", 277219820Sjeff ieee80211_chan2ieee(ic, ic->ic_curchan)); 278219820Sjeff } 279219820Sjeff#endif /* IEEE80211_DEBUG */ 280219820Sjeff} 281219820Sjeff 282219820Sjeff/* 283219820Sjeff * Begin an active scan. 284219820Sjeff */ 285219820Sjeffvoid 286219820Sjeffieee80211_begin_scan(struct ieee80211com *ic, int reset) 287219820Sjeff{ 288219820Sjeff 289219820Sjeff ic->ic_scan.nt_scangen++; 290219820Sjeff /* 291219820Sjeff * In all but hostap mode scanning starts off in 292219820Sjeff * an active mode before switching to passive. 293219820Sjeff */ 294219820Sjeff if (ic->ic_opmode != IEEE80211_M_HOSTAP) { 295219820Sjeff ic->ic_flags |= IEEE80211_F_ASCAN; 296219820Sjeff ic->ic_stats.is_scan_active++; 297219820Sjeff } else 298219820Sjeff ic->ic_stats.is_scan_passive++; 299219820Sjeff IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, 300219820Sjeff "begin %s scan in %s mode, scangen %u\n", 301219820Sjeff (ic->ic_flags & IEEE80211_F_ASCAN) ? "active" : "passive", 302219820Sjeff ieee80211_phymode_name[ic->ic_curmode], ic->ic_scan.nt_scangen); 303219820Sjeff /* 304219820Sjeff * Clear scan state and flush any previously seen AP's. 305219820Sjeff */ 306219820Sjeff ieee80211_reset_scan(ic); 307219820Sjeff if (reset) 308219820Sjeff ieee80211_free_allnodes(&ic->ic_scan); 309219820Sjeff 310219820Sjeff ic->ic_flags |= IEEE80211_F_SCAN; 311219820Sjeff 312219820Sjeff /* Scan the next channel. */ 313219820Sjeff ieee80211_next_scan(ic); 314219820Sjeff} 315219820Sjeff 316219820Sjeff/* 317219820Sjeff * Switch to the next channel marked for scanning. 318219820Sjeff */ 319219820Sjeffint 320219820Sjeffieee80211_next_scan(struct ieee80211com *ic) 321219820Sjeff{ 322219820Sjeff struct ieee80211_channel *chan; 323219820Sjeff 324219820Sjeff /* 325219820Sjeff * Insure any previous mgt frame timeouts don't fire. 326219820Sjeff * This assumes the driver does the right thing in 327219820Sjeff * flushing anything queued in the driver and below. 328219820Sjeff */ 329219820Sjeff ic->ic_mgt_timer = 0; 330219820Sjeff ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN; 331219820Sjeff 332219820Sjeff chan = ic->ic_curchan; 333219820Sjeff do { 334219820Sjeff if (++chan > &ic->ic_channels[IEEE80211_CHAN_MAX]) 335219820Sjeff chan = &ic->ic_channels[0]; 336219820Sjeff if (isset(ic->ic_chan_scan, ieee80211_chan2ieee(ic, chan))) { 337219820Sjeff clrbit(ic->ic_chan_scan, ieee80211_chan2ieee(ic, chan)); 338219820Sjeff IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, 339219820Sjeff "%s: chan %d->%d\n", __func__, 340219820Sjeff ieee80211_chan2ieee(ic, ic->ic_curchan), 341219820Sjeff ieee80211_chan2ieee(ic, chan)); 342219820Sjeff ic->ic_curchan = chan; 343219820Sjeff /* 344219820Sjeff * XXX drivers should do this as needed, 345219820Sjeff * XXX for now maintain compatibility 346219820Sjeff */ 347219820Sjeff ic->ic_bss->ni_rates = *ieee80211_get_suprates(ic, chan); 348219820Sjeff ieee80211_new_state(ic, IEEE80211_S_SCAN, -1); 349219820Sjeff return 1; 350219820Sjeff } 351219820Sjeff } while (chan != ic->ic_curchan); 352219820Sjeff ieee80211_end_scan(ic); 353219820Sjeff return 0; 354219820Sjeff} 355219820Sjeff 356219820Sjeff/* 357219820Sjeff * Probe the curent channel, if allowed, while scanning. 358219820Sjeff * If the channel is not marked passive-only then send 359219820Sjeff * a probe request immediately. Otherwise mark state and 360219820Sjeff * listen for beacons on the channel; if we receive something 361219820Sjeff * then we'll transmit a probe request. 362219820Sjeff */ 363219820Sjeffvoid 364219820Sjeffieee80211_probe_curchan(struct ieee80211com *ic, int force) 365219820Sjeff{ 366219820Sjeff struct ifnet *ifp = ic->ic_ifp; 367219820Sjeff 368219820Sjeff if ((ic->ic_curchan->ic_flags & IEEE80211_CHAN_PASSIVE) == 0 || force) { 369219820Sjeff /* 370219820Sjeff * XXX send both broadcast+directed probe request 371219820Sjeff */ 372219820Sjeff ieee80211_send_probereq(ic->ic_bss, 373219820Sjeff ic->ic_myaddr, ifp->if_broadcastaddr, 374219820Sjeff ifp->if_broadcastaddr, 375219820Sjeff ic->ic_des_essid, ic->ic_des_esslen, 376219820Sjeff ic->ic_opt_ie, ic->ic_opt_ie_len); 377219820Sjeff } else 378219820Sjeff ic->ic_flags_ext |= IEEE80211_FEXT_PROBECHAN; 379219820Sjeff} 380219820Sjeff 381219820Sjeffstatic __inline void 382219820Sjeffcopy_bss(struct ieee80211_node *nbss, const struct ieee80211_node *obss) 383219820Sjeff{ 384219820Sjeff /* propagate useful state */ 385219820Sjeff nbss->ni_authmode = obss->ni_authmode; 386219820Sjeff nbss->ni_txpower = obss->ni_txpower; 387219820Sjeff nbss->ni_vlan = obss->ni_vlan; 388219820Sjeff nbss->ni_rsn = obss->ni_rsn; 389219820Sjeff /* XXX statistics? */ 390219820Sjeff} 391219820Sjeff 392219820Sjeffvoid 393219820Sjeffieee80211_create_ibss(struct ieee80211com* ic, struct ieee80211_channel *chan) 394219820Sjeff{ 395219820Sjeff struct ieee80211_node_table *nt; 396219820Sjeff struct ieee80211_node *ni; 397219820Sjeff 398219820Sjeff IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, 399219820Sjeff "%s: creating ibss\n", __func__); 400219820Sjeff 401219820Sjeff /* 402219820Sjeff * Create the station/neighbor table. Note that for adhoc 403219820Sjeff * mode we make the initial inactivity timer longer since 404219820Sjeff * we create nodes only through discovery and they typically 405219820Sjeff * are long-lived associations. 406219820Sjeff */ 407219820Sjeff nt = &ic->ic_sta; 408219820Sjeff IEEE80211_NODE_LOCK(nt); 409219820Sjeff if (ic->ic_opmode == IEEE80211_M_HOSTAP) { 410219820Sjeff nt->nt_name = "station"; 411219820Sjeff nt->nt_inact_init = ic->ic_inact_init; 412219820Sjeff } else { 413219820Sjeff nt->nt_name = "neighbor"; 414219820Sjeff nt->nt_inact_init = ic->ic_inact_run; 415219820Sjeff } 416219820Sjeff IEEE80211_NODE_UNLOCK(nt); 417219820Sjeff 418219820Sjeff ni = ieee80211_alloc_node(&ic->ic_sta, ic->ic_myaddr); 419219820Sjeff if (ni == NULL) { 420219820Sjeff /* XXX recovery? */ 421219820Sjeff return; 422219820Sjeff } 423219820Sjeff IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_myaddr); 424219820Sjeff ni->ni_esslen = ic->ic_des_esslen; 425219820Sjeff memcpy(ni->ni_essid, ic->ic_des_essid, ni->ni_esslen); 426219820Sjeff copy_bss(ni, ic->ic_bss); 427219820Sjeff ni->ni_intval = ic->ic_bintval; 428219820Sjeff if (ic->ic_flags & IEEE80211_F_PRIVACY) 429219820Sjeff ni->ni_capinfo |= IEEE80211_CAPINFO_PRIVACY; 430219820Sjeff if (ic->ic_phytype == IEEE80211_T_FH) { 431219820Sjeff ni->ni_fhdwell = 200; /* XXX */ 432219820Sjeff ni->ni_fhindex = 1; 433219820Sjeff } 434219820Sjeff if (ic->ic_opmode == IEEE80211_M_IBSS) { 435219820Sjeff ic->ic_flags |= IEEE80211_F_SIBSS; 436219820Sjeff ni->ni_capinfo |= IEEE80211_CAPINFO_IBSS; /* XXX */ 437219820Sjeff if (ic->ic_flags & IEEE80211_F_DESBSSID) 438219820Sjeff IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_des_bssid); 439219820Sjeff else 440219820Sjeff ni->ni_bssid[0] |= 0x02; /* local bit for IBSS */ 441219820Sjeff } else if (ic->ic_opmode == IEEE80211_M_AHDEMO) { 442219820Sjeff if (ic->ic_flags & IEEE80211_F_DESBSSID) 443219820Sjeff IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_des_bssid); 444219820Sjeff else 445219820Sjeff memset(ni->ni_bssid, 0, IEEE80211_ADDR_LEN); 446219820Sjeff } 447219820Sjeff /* 448219820Sjeff * Fix the channel and related attributes. 449219820Sjeff */ 450219820Sjeff ieee80211_set_chan(ic, ni, chan); 451219820Sjeff ic->ic_curchan = chan; 452219820Sjeff ic->ic_curmode = ieee80211_chan2mode(ic, chan); 453219820Sjeff /* 454219820Sjeff * Do mode-specific rate setup. 455219820Sjeff */ 456219820Sjeff if (ic->ic_curmode == IEEE80211_MODE_11G) { 457219820Sjeff /* 458219820Sjeff * Use a mixed 11b/11g rate set. 459219820Sjeff */ 460219820Sjeff ieee80211_set11gbasicrates(&ni->ni_rates, IEEE80211_MODE_11G); 461219820Sjeff } else if (ic->ic_curmode == IEEE80211_MODE_11B) { 462219820Sjeff /* 463219820Sjeff * Force pure 11b rate set. 464219820Sjeff */ 465219820Sjeff ieee80211_set11gbasicrates(&ni->ni_rates, IEEE80211_MODE_11B); 466219820Sjeff } 467219820Sjeff 468219820Sjeff (void) ieee80211_sta_join(ic, ieee80211_ref_node(ni)); 469219820Sjeff} 470219820Sjeff 471219820Sjeffvoid 472219820Sjeffieee80211_reset_bss(struct ieee80211com *ic) 473219820Sjeff{ 474219820Sjeff struct ieee80211_node *ni, *obss; 475219820Sjeff 476219820Sjeff ieee80211_node_table_reset(&ic->ic_scan); 477219820Sjeff ieee80211_node_table_reset(&ic->ic_sta); 478219820Sjeff 479219820Sjeff ni = ieee80211_alloc_node(&ic->ic_scan, ic->ic_myaddr); 480219820Sjeff KASSERT(ni != NULL, ("unable to setup inital BSS node")); 481219820Sjeff obss = ic->ic_bss; 482219820Sjeff ic->ic_bss = ieee80211_ref_node(ni); 483219820Sjeff if (obss != NULL) { 484219820Sjeff copy_bss(ni, obss); 485219820Sjeff ni->ni_intval = ic->ic_bintval; 486219820Sjeff ieee80211_free_node(obss); 487219820Sjeff } 488219820Sjeff} 489219820Sjeff 490219820Sjeff/* XXX tunable */ 491219820Sjeff#define STA_FAILS_MAX 2 /* assoc failures before ignored */ 492219820Sjeff 493219820Sjeffstatic int 494219820Sjeffieee80211_match_bss(struct ieee80211com *ic, struct ieee80211_node *ni) 495219820Sjeff{ 496219820Sjeff u_int8_t rate; 497219820Sjeff int fail; 498219820Sjeff 499219820Sjeff fail = 0; 500219820Sjeff if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 501219820Sjeff fail |= 0x01; 502219820Sjeff if (ic->ic_des_chan != IEEE80211_CHAN_ANYC && 503219820Sjeff ni->ni_chan != ic->ic_des_chan) 504219820Sjeff fail |= 0x01; 505219820Sjeff if (ic->ic_opmode == IEEE80211_M_IBSS) { 506219820Sjeff if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 507219820Sjeff fail |= 0x02; 508219820Sjeff } else { 509219820Sjeff if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 510219820Sjeff fail |= 0x02; 511219820Sjeff } 512219820Sjeff if (ic->ic_flags & IEEE80211_F_PRIVACY) { 513219820Sjeff if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 514219820Sjeff fail |= 0x04; 515219820Sjeff } else { 516219820Sjeff /* XXX does this mean privacy is supported or required? */ 517219820Sjeff if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 518219820Sjeff fail |= 0x04; 519219820Sjeff } 520219820Sjeff rate = ieee80211_fix_rate(ni, 521219820Sjeff IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 522219820Sjeff if (rate & IEEE80211_RATE_BASIC) 523219820Sjeff fail |= 0x08; 524219820Sjeff if (ic->ic_des_esslen != 0 && 525219820Sjeff (ni->ni_esslen != ic->ic_des_esslen || 526219820Sjeff memcmp(ni->ni_essid, ic->ic_des_essid, ic->ic_des_esslen) != 0)) 527219820Sjeff fail |= 0x10; 528219820Sjeff if ((ic->ic_flags & IEEE80211_F_DESBSSID) && 529219820Sjeff !IEEE80211_ADDR_EQ(ic->ic_des_bssid, ni->ni_bssid)) 530219820Sjeff fail |= 0x20; 531219820Sjeff if (ni->ni_fails >= STA_FAILS_MAX) 532219820Sjeff fail |= 0x40; 533219820Sjeff#ifdef IEEE80211_DEBUG 534219820Sjeff if (ieee80211_msg_scan(ic)) { 535219820Sjeff printf(" %c %s", 536219820Sjeff fail & 0x40 ? '=' : fail & 0x80 ? '^' : fail ? '-' : '+', 537219820Sjeff ether_sprintf(ni->ni_macaddr)); 538219820Sjeff printf(" %s%c", ether_sprintf(ni->ni_bssid), 539219820Sjeff fail & 0x20 ? '!' : ' '); 540219820Sjeff printf(" %3d%c", ieee80211_chan2ieee(ic, ni->ni_chan), 541219820Sjeff fail & 0x01 ? '!' : ' '); 542219820Sjeff printf(" %+4d", ni->ni_rssi); 543219820Sjeff printf(" %2dM%c", (rate & IEEE80211_RATE_VAL) / 2, 544219820Sjeff fail & 0x08 ? '!' : ' '); 545219820Sjeff printf(" %4s%c", 546219820Sjeff (ni->ni_capinfo & IEEE80211_CAPINFO_ESS) ? "ess" : 547219820Sjeff (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) ? "ibss" : 548219820Sjeff "????", 549219820Sjeff fail & 0x02 ? '!' : ' '); 550219820Sjeff printf(" %3s%c ", 551219820Sjeff (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) ? 552219820Sjeff "wep" : "no", 553219820Sjeff fail & 0x04 ? '!' : ' '); 554219820Sjeff ieee80211_print_essid(ni->ni_essid, ni->ni_esslen); 555219820Sjeff printf("%s\n", fail & 0x10 ? "!" : ""); 556219820Sjeff } 557219820Sjeff#endif 558219820Sjeff return fail; 559219820Sjeff} 560219820Sjeff 561219820Sjeffstatic __inline u_int8_t 562219820Sjeffmaxrate(const struct ieee80211_node *ni) 563219820Sjeff{ 564219820Sjeff const struct ieee80211_rateset *rs = &ni->ni_rates; 565219820Sjeff /* NB: assumes rate set is sorted (happens on frame receive) */ 566219820Sjeff return rs->rs_rates[rs->rs_nrates-1] & IEEE80211_RATE_VAL; 567219820Sjeff} 568219820Sjeff 569219820Sjeff/* 570219820Sjeff * Compare the capabilities of two nodes and decide which is 571219820Sjeff * more desirable (return >0 if a is considered better). Note 572219820Sjeff * that we assume compatibility/usability has already been checked 573219820Sjeff * so we don't need to (e.g. validate whether privacy is supported). 574219820Sjeff * Used to select the best scan candidate for association in a BSS. 575219820Sjeff */ 576219820Sjeffstatic int 577219820Sjeffieee80211_node_compare(struct ieee80211com *ic, 578219820Sjeff const struct ieee80211_node *a, 579219820Sjeff const struct ieee80211_node *b) 580219820Sjeff{ 581219820Sjeff u_int8_t maxa, maxb; 582219820Sjeff u_int8_t rssia, rssib; 583219820Sjeff int weight; 584219820Sjeff 585219820Sjeff /* privacy support preferred */ 586219820Sjeff if ((a->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) && 587219820Sjeff (b->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 588219820Sjeff return 1; 589219820Sjeff if ((a->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0 && 590219820Sjeff (b->ni_capinfo & IEEE80211_CAPINFO_PRIVACY)) 591219820Sjeff return -1; 592219820Sjeff 593219820Sjeff /* compare count of previous failures */ 594219820Sjeff weight = b->ni_fails - a->ni_fails; 595219820Sjeff if (abs(weight) > 1) 596219820Sjeff return weight; 597219820Sjeff 598219820Sjeff rssia = ic->ic_node_getrssi(a); 599219820Sjeff rssib = ic->ic_node_getrssi(b); 600219820Sjeff if (abs(rssib - rssia) < 5) { 601219820Sjeff /* best/max rate preferred if signal level close enough XXX */ 602219820Sjeff maxa = maxrate(a); 603219820Sjeff maxb = maxrate(b); 604219820Sjeff if (maxa != maxb) 605219820Sjeff return maxa - maxb; 606219820Sjeff /* XXX use freq for channel preference */ 607219820Sjeff /* for now just prefer 5Ghz band to all other bands */ 608219820Sjeff if (IEEE80211_IS_CHAN_5GHZ(a->ni_chan) && 609219820Sjeff !IEEE80211_IS_CHAN_5GHZ(b->ni_chan)) 610219820Sjeff return 1; 611219820Sjeff if (!IEEE80211_IS_CHAN_5GHZ(a->ni_chan) && 612219820Sjeff IEEE80211_IS_CHAN_5GHZ(b->ni_chan)) 613219820Sjeff return -1; 614219820Sjeff } 615219820Sjeff /* all things being equal, use signal level */ 616219820Sjeff return rssia - rssib; 617219820Sjeff} 618219820Sjeff 619219820Sjeff/* 620219820Sjeff * Mark an ongoing scan stopped. 621219820Sjeff */ 622219820Sjeffvoid 623219820Sjeffieee80211_cancel_scan(struct ieee80211com *ic) 624219820Sjeff{ 625219820Sjeff 626219820Sjeff IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, "%s: end %s scan\n", 627219820Sjeff __func__, 628219820Sjeff (ic->ic_flags & IEEE80211_F_ASCAN) ? "active" : "passive"); 629219820Sjeff 630219820Sjeff ic->ic_flags &= ~(IEEE80211_F_SCAN | IEEE80211_F_ASCAN); 631219820Sjeff ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN; 632219820Sjeff} 633219820Sjeff 634219820Sjeff/* 635219820Sjeff * Complete a scan of potential channels. 636219820Sjeff */ 637219820Sjeffvoid 638219820Sjeffieee80211_end_scan(struct ieee80211com *ic) 639219820Sjeff{ 640219820Sjeff struct ieee80211_node_table *nt = &ic->ic_scan; 641219820Sjeff struct ieee80211_node *ni, *selbs; 642219820Sjeff 643219820Sjeff ieee80211_cancel_scan(ic); 644219820Sjeff ieee80211_notify_scan_done(ic); 645219820Sjeff 646219820Sjeff if (ic->ic_opmode == IEEE80211_M_HOSTAP) { 647219820Sjeff u_int8_t maxrssi[IEEE80211_CHAN_MAX]; /* XXX off stack? */ 648219820Sjeff int i, bestchan; 649219820Sjeff u_int8_t rssi; 650219820Sjeff 651219820Sjeff /* 652219820Sjeff * The passive scan to look for existing AP's completed, 653219820Sjeff * select a channel to camp on. Identify the channels 654219820Sjeff * that already have one or more AP's and try to locate 655219820Sjeff * an unoccupied one. If that fails, pick a channel that 656219820Sjeff * looks to be quietest. 657219820Sjeff */ 658219820Sjeff memset(maxrssi, 0, sizeof(maxrssi)); 659219820Sjeff IEEE80211_NODE_LOCK(nt); 660219820Sjeff TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 661219820Sjeff rssi = ic->ic_node_getrssi(ni); 662219820Sjeff i = ieee80211_chan2ieee(ic, ni->ni_chan); 663219820Sjeff if (rssi > maxrssi[i]) 664219820Sjeff maxrssi[i] = rssi; 665219820Sjeff } 666219820Sjeff IEEE80211_NODE_UNLOCK(nt); 667219820Sjeff /* XXX select channel more intelligently */ 668219820Sjeff bestchan = -1; 669219820Sjeff for (i = 0; i < IEEE80211_CHAN_MAX; i++) 670219820Sjeff if (isset(ic->ic_chan_active, i)) { 671219820Sjeff /* 672219820Sjeff * If the channel is unoccupied the max rssi 673219820Sjeff * should be zero; just take it. Otherwise 674219820Sjeff * track the channel with the lowest rssi and 675219820Sjeff * use that when all channels appear occupied. 676219820Sjeff */ 677219820Sjeff if (maxrssi[i] == 0) { 678219820Sjeff bestchan = i; 679219820Sjeff break; 680219820Sjeff } 681219820Sjeff if (bestchan == -1 || 682219820Sjeff maxrssi[i] < maxrssi[bestchan]) 683219820Sjeff bestchan = i; 684219820Sjeff } 685219820Sjeff if (bestchan != -1) { 686219820Sjeff ieee80211_create_ibss(ic, &ic->ic_channels[bestchan]); 687219820Sjeff return; 688219820Sjeff } 689219820Sjeff /* no suitable channel, should not happen */ 690219820Sjeff } 691219820Sjeff 692219820Sjeff /* 693219820Sjeff * When manually sequencing the state machine; scan just once 694219820Sjeff * regardless of whether we have a candidate or not. The 695219820Sjeff * controlling application is expected to setup state and 696219820Sjeff * initiate an association. 697219820Sjeff */ 698219820Sjeff if (ic->ic_roaming == IEEE80211_ROAMING_MANUAL) 699219820Sjeff return; 700219820Sjeff /* 701219820Sjeff * Automatic sequencing; look for a candidate and 702219820Sjeff * if found join the network. 703219820Sjeff */ 704219820Sjeff /* NB: unlocked read should be ok */ 705219820Sjeff if (TAILQ_FIRST(&nt->nt_node) == NULL) { 706219820Sjeff IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, 707219820Sjeff "%s: no scan candidate\n", __func__); 708219820Sjeff notfound: 709219820Sjeff if (ic->ic_opmode == IEEE80211_M_IBSS && 710219820Sjeff (ic->ic_flags & IEEE80211_F_IBSSON) && 711219820Sjeff ic->ic_des_esslen != 0) { 712219820Sjeff ieee80211_create_ibss(ic, ic->ic_ibss_chan); 713219820Sjeff return; 714219820Sjeff } 715219820Sjeff /* 716219820Sjeff * Decrement the failure counts so entries will be 717219820Sjeff * reconsidered the next time around. We really want 718219820Sjeff * to do this only for sta's where we've previously 719219820Sjeff * had some success. 720219820Sjeff */ 721219820Sjeff IEEE80211_NODE_LOCK(nt); 722219820Sjeff TAILQ_FOREACH(ni, &nt->nt_node, ni_list) 723219820Sjeff if (ni->ni_fails) 724219820Sjeff ni->ni_fails--; 725219820Sjeff IEEE80211_NODE_UNLOCK(nt); 726219820Sjeff /* 727219820Sjeff * Reset the list of channels to scan and start again. 728219820Sjeff */ 729219820Sjeff ieee80211_reset_scan(ic); 730219820Sjeff ic->ic_flags |= IEEE80211_F_SCAN; 731219820Sjeff ieee80211_next_scan(ic); 732219820Sjeff return; 733219820Sjeff } 734219820Sjeff selbs = NULL; 735219820Sjeff IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, "\t%s\n", 736219820Sjeff "macaddr bssid chan rssi rate flag wep essid"); 737219820Sjeff IEEE80211_NODE_LOCK(nt); 738219820Sjeff TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 739219820Sjeff if (ieee80211_match_bss(ic, ni) == 0) { 740219820Sjeff if (selbs == NULL) 741219820Sjeff selbs = ni; 742219820Sjeff else if (ieee80211_node_compare(ic, ni, selbs) > 0) 743219820Sjeff selbs = ni; 744219820Sjeff } 745219820Sjeff } 746219820Sjeff if (selbs != NULL) /* NB: grab ref while dropping lock */ 747219820Sjeff (void) ieee80211_ref_node(selbs); 748219820Sjeff IEEE80211_NODE_UNLOCK(nt); 749219820Sjeff if (selbs == NULL) 750219820Sjeff goto notfound; 751219820Sjeff if (!ieee80211_sta_join(ic, selbs)) { 752219820Sjeff ieee80211_free_node(selbs); 753219820Sjeff goto notfound; 754219820Sjeff } 755219820Sjeff} 756219820Sjeff 757219820Sjeff/* 758219820Sjeff * Handle 802.11 ad hoc network merge. The 759219820Sjeff * convention, set by the Wireless Ethernet Compatibility Alliance 760219820Sjeff * (WECA), is that an 802.11 station will change its BSSID to match 761219820Sjeff * the "oldest" 802.11 ad hoc network, on the same channel, that 762219820Sjeff * has the station's desired SSID. The "oldest" 802.11 network 763219820Sjeff * sends beacons with the greatest TSF timestamp. 764219820Sjeff * 765219820Sjeff * The caller is assumed to validate TSF's before attempting a merge. 766219820Sjeff * 767219820Sjeff * Return !0 if the BSSID changed, 0 otherwise. 768219820Sjeff */ 769219820Sjeffint 770219820Sjeffieee80211_ibss_merge(struct ieee80211_node *ni) 771219820Sjeff{ 772219820Sjeff struct ieee80211com *ic = ni->ni_ic; 773219820Sjeff 774219820Sjeff if (ni == ic->ic_bss || 775219820Sjeff IEEE80211_ADDR_EQ(ni->ni_bssid, ic->ic_bss->ni_bssid)) { 776219820Sjeff /* unchanged, nothing to do */ 777219820Sjeff return 0; 778219820Sjeff } 779219820Sjeff if (ieee80211_match_bss(ic, ni) != 0) { /* capabilities mismatch */ 780219820Sjeff IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 781219820Sjeff "%s: merge failed, capabilities mismatch\n", __func__); 782219820Sjeff ic->ic_stats.is_ibss_capmismatch++; 783219820Sjeff return 0; 784219820Sjeff } 785219820Sjeff IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 786219820Sjeff "%s: new bssid %s: %s preamble, %s slot time%s\n", __func__, 787219820Sjeff ether_sprintf(ni->ni_bssid), 788219820Sjeff ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long", 789219820Sjeff ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long", 790219820Sjeff ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : "" 791219820Sjeff ); 792219820Sjeff return ieee80211_sta_join(ic, ieee80211_ref_node(ni)); 793219820Sjeff} 794219820Sjeff 795219820Sjeff/* 796219820Sjeff * Join the specified IBSS/BSS network. The node is assumed to 797219820Sjeff * be passed in with a held reference. 798219820Sjeff */ 799219820Sjeffint 800219820Sjeffieee80211_sta_join(struct ieee80211com *ic, struct ieee80211_node *selbs) 801219820Sjeff{ 802219820Sjeff struct ieee80211_node *obss; 803219820Sjeff 804219820Sjeff if (ic->ic_opmode == IEEE80211_M_IBSS) { 805219820Sjeff struct ieee80211_node_table *nt; 806219820Sjeff /* 807219820Sjeff * Fillin the neighbor table; it will already 808219820Sjeff * exist if we are simply switching mastership. 809219820Sjeff * XXX ic_sta always setup so this is unnecessary? 810219820Sjeff */ 811219820Sjeff nt = &ic->ic_sta; 812219820Sjeff IEEE80211_NODE_LOCK(nt); 813219820Sjeff nt->nt_name = "neighbor"; 814219820Sjeff nt->nt_inact_init = ic->ic_inact_run; 815219820Sjeff IEEE80211_NODE_UNLOCK(nt); 816219820Sjeff } 817219820Sjeff 818219820Sjeff /* 819219820Sjeff * Committed to selbs, setup state. 820219820Sjeff */ 821219820Sjeff obss = ic->ic_bss; 822219820Sjeff ic->ic_bss = selbs; /* NB: caller assumed to bump refcnt */ 823219820Sjeff if (obss != NULL) { 824219820Sjeff copy_bss(selbs, obss); 825219820Sjeff ieee80211_free_node(obss); 826219820Sjeff } 827219820Sjeff 828219820Sjeff /* 829219820Sjeff * Delete unusable rates; we've already checked 830219820Sjeff * that the negotiated rate set is acceptable. 831219820Sjeff */ 832219820Sjeff ieee80211_fix_rate(ic->ic_bss, IEEE80211_F_DODEL | IEEE80211_F_JOIN); 833219820Sjeff 834219820Sjeff /* 835219820Sjeff * Set the erp state (mostly the slot time) to deal with 836219820Sjeff * the auto-select case; this should be redundant if the 837219820Sjeff * mode is locked. 838219820Sjeff */ 839219820Sjeff ic->ic_curmode = ieee80211_chan2mode(ic, selbs->ni_chan); 840219820Sjeff ic->ic_curchan = selbs->ni_chan; 841219820Sjeff ieee80211_reset_erp(ic); 842219820Sjeff ieee80211_wme_initparams(ic); 843219820Sjeff 844219820Sjeff if (ic->ic_opmode == IEEE80211_M_STA) 845219820Sjeff ieee80211_new_state(ic, IEEE80211_S_AUTH, -1); 846219820Sjeff else 847219820Sjeff ieee80211_new_state(ic, IEEE80211_S_RUN, -1); 848219820Sjeff return 1; 849219820Sjeff} 850219820Sjeff 851219820Sjeff/* 852219820Sjeff * Leave the specified IBSS/BSS network. The node is assumed to 853219820Sjeff * be passed in with a held reference. 854219820Sjeff */ 855219820Sjeffvoid 856219820Sjeffieee80211_sta_leave(struct ieee80211com *ic, struct ieee80211_node *ni) 857219820Sjeff{ 858219820Sjeff ic->ic_node_cleanup(ni); 859219820Sjeff ieee80211_notify_node_leave(ic, ni); 860219820Sjeff} 861219820Sjeff 862219820Sjeffstatic struct ieee80211_node * 863219820Sjeffnode_alloc(struct ieee80211_node_table *nt) 864219820Sjeff{ 865219820Sjeff struct ieee80211_node *ni; 866219820Sjeff 867219820Sjeff MALLOC(ni, struct ieee80211_node *, sizeof(struct ieee80211_node), 868219820Sjeff M_80211_NODE, M_NOWAIT | M_ZERO); 869219820Sjeff return ni; 870219820Sjeff} 871219820Sjeff 872219820Sjeff/* 873219820Sjeff * Reclaim any resources in a node and reset any critical 874219820Sjeff * state. Typically nodes are free'd immediately after, 875219820Sjeff * but in some cases the storage may be reused so we need 876219820Sjeff * to insure consistent state (should probably fix that). 877219820Sjeff */ 878219820Sjeffstatic void 879219820Sjeffnode_cleanup(struct ieee80211_node *ni) 880219820Sjeff{ 881219820Sjeff#define N(a) (sizeof(a)/sizeof(a[0])) 882219820Sjeff struct ieee80211com *ic = ni->ni_ic; 883219820Sjeff int i, qlen; 884219820Sjeff 885219820Sjeff /* NB: preserve ni_table */ 886219820Sjeff if (ni->ni_flags & IEEE80211_NODE_PWR_MGT) { 887219820Sjeff ic->ic_ps_sta--; 888219820Sjeff ni->ni_flags &= ~IEEE80211_NODE_PWR_MGT; 889219820Sjeff IEEE80211_DPRINTF(ic, IEEE80211_MSG_POWER, 890219820Sjeff "[%s] power save mode off, %u sta's in ps mode\n", 891219820Sjeff ether_sprintf(ni->ni_macaddr), ic->ic_ps_sta); 892219820Sjeff } 893219820Sjeff /* 894219820Sjeff * Clear AREF flag that marks the authorization refcnt bump 895219820Sjeff * has happened. This is probably not needed as the node 896219820Sjeff * should always be removed from the table so not found but 897219820Sjeff * do it just in case. 898219820Sjeff */ 899219820Sjeff ni->ni_flags &= ~IEEE80211_NODE_AREF; 900219820Sjeff 901219820Sjeff /* 902219820Sjeff * Drain power save queue and, if needed, clear TIM. 903219820Sjeff */ 904219820Sjeff IEEE80211_NODE_SAVEQ_DRAIN(ni, qlen); 905219820Sjeff if (qlen != 0 && ic->ic_set_tim != NULL) 906219820Sjeff ic->ic_set_tim(ni, 0); 907219820Sjeff 908219820Sjeff ni->ni_associd = 0; 909219820Sjeff if (ni->ni_challenge != NULL) { 910219820Sjeff FREE(ni->ni_challenge, M_DEVBUF); 911219820Sjeff ni->ni_challenge = NULL; 912219820Sjeff } 913219820Sjeff /* 914219820Sjeff * Preserve SSID, WPA, and WME ie's so the bss node is 915219820Sjeff * reusable during a re-auth/re-assoc state transition. 916219820Sjeff * If we remove these data they will not be recreated 917219820Sjeff * because they come from a probe-response or beacon frame 918219820Sjeff * which cannot be expected prior to the association-response. 919219820Sjeff * This should not be an issue when operating in other modes 920219820Sjeff * as stations leaving always go through a full state transition 921219820Sjeff * which will rebuild this state. 922219820Sjeff * 923219820Sjeff * XXX does this leave us open to inheriting old state? 924219820Sjeff */ 925219820Sjeff for (i = 0; i < N(ni->ni_rxfrag); i++) 926219820Sjeff if (ni->ni_rxfrag[i] != NULL) { 927219820Sjeff m_freem(ni->ni_rxfrag[i]); 928219820Sjeff ni->ni_rxfrag[i] = NULL; 929219820Sjeff } 930219820Sjeff /* 931219820Sjeff * Must be careful here to remove any key map entry w/o a LOR. 932219820Sjeff */ 933219820Sjeff ieee80211_node_delucastkey(ni); 934219820Sjeff#undef N 935219820Sjeff} 936219820Sjeff 937219820Sjeffstatic void 938219820Sjeffnode_free(struct ieee80211_node *ni) 939219820Sjeff{ 940219820Sjeff struct ieee80211com *ic = ni->ni_ic; 941219820Sjeff 942219820Sjeff ic->ic_node_cleanup(ni); 943219820Sjeff if (ni->ni_wpa_ie != NULL) 944219820Sjeff FREE(ni->ni_wpa_ie, M_DEVBUF); 945219820Sjeff if (ni->ni_wme_ie != NULL) 946219820Sjeff FREE(ni->ni_wme_ie, M_DEVBUF); 947219820Sjeff IEEE80211_NODE_SAVEQ_DESTROY(ni); 948219820Sjeff FREE(ni, M_80211_NODE); 949219820Sjeff} 950219820Sjeff 951219820Sjeffstatic u_int8_t 952219820Sjeffnode_getrssi(const struct ieee80211_node *ni) 953219820Sjeff{ 954219820Sjeff return ni->ni_rssi; 955219820Sjeff} 956219820Sjeff 957219820Sjeffstatic void 958219820Sjeffieee80211_setup_node(struct ieee80211_node_table *nt, 959219820Sjeff struct ieee80211_node *ni, const u_int8_t *macaddr) 960219820Sjeff{ 961219820Sjeff struct ieee80211com *ic = nt->nt_ic; 962219820Sjeff int hash; 963219820Sjeff 964219820Sjeff IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 965219820Sjeff "%s %p<%s> in %s table\n", __func__, ni, 966219820Sjeff ether_sprintf(macaddr), nt->nt_name); 967219820Sjeff 968219820Sjeff IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 969219820Sjeff hash = IEEE80211_NODE_HASH(macaddr); 970219820Sjeff ieee80211_node_initref(ni); /* mark referenced */ 971219820Sjeff ni->ni_chan = IEEE80211_CHAN_ANYC; 972219820Sjeff ni->ni_authmode = IEEE80211_AUTH_OPEN; 973219820Sjeff ni->ni_txpower = ic->ic_txpowlimit; /* max power */ 974219820Sjeff ieee80211_crypto_resetkey(ic, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE); 975219820Sjeff ni->ni_inact_reload = nt->nt_inact_init; 976219820Sjeff ni->ni_inact = ni->ni_inact_reload; 977219820Sjeff IEEE80211_NODE_SAVEQ_INIT(ni, "unknown"); 978219820Sjeff 979219820Sjeff IEEE80211_NODE_LOCK(nt); 980219820Sjeff TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list); 981219820Sjeff LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash); 982219820Sjeff ni->ni_table = nt; 983219820Sjeff ni->ni_ic = ic; 984219820Sjeff IEEE80211_NODE_UNLOCK(nt); 985219820Sjeff} 986219820Sjeff 987219820Sjeffstruct ieee80211_node * 988219820Sjeffieee80211_alloc_node(struct ieee80211_node_table *nt, const u_int8_t *macaddr) 989219820Sjeff{ 990219820Sjeff struct ieee80211com *ic = nt->nt_ic; 991219820Sjeff struct ieee80211_node *ni; 992219820Sjeff 993219820Sjeff ni = ic->ic_node_alloc(nt); 994219820Sjeff if (ni != NULL) 995219820Sjeff ieee80211_setup_node(nt, ni, macaddr); 996219820Sjeff else 997219820Sjeff ic->ic_stats.is_rx_nodealloc++; 998219820Sjeff return ni; 999219820Sjeff} 1000219820Sjeff 1001219820Sjeff/* 1002219820Sjeff * Craft a temporary node suitable for sending a management frame 1003219820Sjeff * to the specified station. We craft only as much state as we 1004219820Sjeff * need to do the work since the node will be immediately reclaimed 1005219820Sjeff * once the send completes. 1006219820Sjeff */ 1007219820Sjeffstruct ieee80211_node * 1008219820Sjeffieee80211_tmp_node(struct ieee80211com *ic, const u_int8_t *macaddr) 1009219820Sjeff{ 1010219820Sjeff struct ieee80211_node *ni; 1011219820Sjeff 1012219820Sjeff ni = ic->ic_node_alloc(&ic->ic_sta); 1013219820Sjeff if (ni != NULL) { 1014219820Sjeff IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1015219820Sjeff "%s %p<%s>\n", __func__, ni, ether_sprintf(macaddr)); 1016219820Sjeff 1017219820Sjeff IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1018219820Sjeff IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_bss->ni_bssid); 1019219820Sjeff ieee80211_node_initref(ni); /* mark referenced */ 1020219820Sjeff ni->ni_txpower = ic->ic_bss->ni_txpower; 1021219820Sjeff /* NB: required by ieee80211_fix_rate */ 1022219820Sjeff ieee80211_set_chan(ic, ni, ic->ic_bss->ni_chan); 1023219820Sjeff ieee80211_crypto_resetkey(ic, &ni->ni_ucastkey, 1024219820Sjeff IEEE80211_KEYIX_NONE); 1025219820Sjeff /* XXX optimize away */ 1026219820Sjeff IEEE80211_NODE_SAVEQ_INIT(ni, "unknown"); 1027219820Sjeff 1028219820Sjeff ni->ni_table = NULL; /* NB: pedantic */ 1029219820Sjeff ni->ni_ic = ic; 1030219820Sjeff } else { 1031219820Sjeff /* XXX msg */ 1032219820Sjeff ic->ic_stats.is_rx_nodealloc++; 1033219820Sjeff } 1034219820Sjeff return ni; 1035219820Sjeff} 1036219820Sjeff 1037219820Sjeffstruct ieee80211_node * 1038219820Sjeffieee80211_dup_bss(struct ieee80211_node_table *nt, const u_int8_t *macaddr) 1039219820Sjeff{ 1040219820Sjeff struct ieee80211com *ic = nt->nt_ic; 1041219820Sjeff struct ieee80211_node *ni; 1042219820Sjeff 1043219820Sjeff ni = ic->ic_node_alloc(nt); 1044219820Sjeff if (ni != NULL) { 1045219820Sjeff ieee80211_setup_node(nt, ni, macaddr); 1046219820Sjeff /* 1047219820Sjeff * Inherit from ic_bss. 1048219820Sjeff */ 1049219820Sjeff ni->ni_authmode = ic->ic_bss->ni_authmode; 1050219820Sjeff ni->ni_txpower = ic->ic_bss->ni_txpower; 1051219820Sjeff ni->ni_vlan = ic->ic_bss->ni_vlan; /* XXX?? */ 1052219820Sjeff IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_bss->ni_bssid); 1053219820Sjeff ieee80211_set_chan(ic, ni, ic->ic_bss->ni_chan); 1054219820Sjeff ni->ni_rsn = ic->ic_bss->ni_rsn; 1055219820Sjeff } else 1056219820Sjeff ic->ic_stats.is_rx_nodealloc++; 1057219820Sjeff return ni; 1058219820Sjeff} 1059219820Sjeff 1060219820Sjeffstatic struct ieee80211_node * 1061219820Sjeff#ifdef IEEE80211_DEBUG_REFCNT 1062219820Sjeff_ieee80211_find_node_debug(struct ieee80211_node_table *nt, 1063219820Sjeff const u_int8_t *macaddr, const char *func, int line) 1064219820Sjeff#else 1065219820Sjeff_ieee80211_find_node(struct ieee80211_node_table *nt, 1066219820Sjeff const u_int8_t *macaddr) 1067219820Sjeff#endif 1068219820Sjeff{ 1069219820Sjeff struct ieee80211_node *ni; 1070219820Sjeff int hash; 1071219820Sjeff 1072219820Sjeff IEEE80211_NODE_LOCK_ASSERT(nt); 1073219820Sjeff 1074219820Sjeff hash = IEEE80211_NODE_HASH(macaddr); 1075219820Sjeff LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1076219820Sjeff if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1077219820Sjeff ieee80211_ref_node(ni); /* mark referenced */ 1078219820Sjeff#ifdef IEEE80211_DEBUG_REFCNT 1079219820Sjeff IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE, 1080219820Sjeff "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1081219820Sjeff func, line, 1082219820Sjeff ni, ether_sprintf(ni->ni_macaddr), 1083219820Sjeff ieee80211_node_refcnt(ni)); 1084219820Sjeff#endif 1085219820Sjeff return ni; 1086219820Sjeff } 1087219820Sjeff } 1088219820Sjeff return NULL; 1089219820Sjeff} 1090219820Sjeff#ifdef IEEE80211_DEBUG_REFCNT 1091219820Sjeff#define _ieee80211_find_node(nt, mac) \ 1092219820Sjeff _ieee80211_find_node_debug(nt, mac, func, line) 1093219820Sjeff#endif 1094219820Sjeff 1095219820Sjeffstruct ieee80211_node * 1096219820Sjeff#ifdef IEEE80211_DEBUG_REFCNT 1097219820Sjeffieee80211_find_node_debug(struct ieee80211_node_table *nt, 1098219820Sjeff const u_int8_t *macaddr, const char *func, int line) 1099219820Sjeff#else 1100219820Sjeffieee80211_find_node(struct ieee80211_node_table *nt, const u_int8_t *macaddr) 1101219820Sjeff#endif 1102219820Sjeff{ 1103219820Sjeff struct ieee80211_node *ni; 1104219820Sjeff 1105219820Sjeff IEEE80211_NODE_LOCK(nt); 1106219820Sjeff ni = _ieee80211_find_node(nt, macaddr); 1107219820Sjeff IEEE80211_NODE_UNLOCK(nt); 1108219820Sjeff return ni; 1109219820Sjeff} 1110219820Sjeff 1111219820Sjeff/* 1112219820Sjeff * Fake up a node; this handles node discovery in adhoc mode. 1113219820Sjeff * Note that for the driver's benefit we we treat this like 1114219820Sjeff * an association so the driver has an opportunity to setup 1115219820Sjeff * it's private state. 1116219820Sjeff */ 1117219820Sjeffstruct ieee80211_node * 1118219820Sjeffieee80211_fakeup_adhoc_node(struct ieee80211_node_table *nt, 1119219820Sjeff const u_int8_t macaddr[IEEE80211_ADDR_LEN]) 1120219820Sjeff{ 1121219820Sjeff struct ieee80211com *ic = nt->nt_ic; 1122219820Sjeff struct ieee80211_node *ni; 1123219820Sjeff 1124219820Sjeff IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE, 1125219820Sjeff "%s: mac<%s>\n", __func__, ether_sprintf(macaddr)); 1126219820Sjeff ni = ieee80211_dup_bss(nt, macaddr); 1127219820Sjeff if (ni != NULL) { 1128219820Sjeff /* XXX no rate negotiation; just dup */ 1129219820Sjeff ni->ni_rates = ic->ic_bss->ni_rates; 1130219820Sjeff if (ic->ic_newassoc != NULL) 1131219820Sjeff ic->ic_newassoc(ni, 1); 1132219820Sjeff /* XXX not right for 802.1x/WPA */ 1133219820Sjeff ieee80211_node_authorize(ni); 1134219820Sjeff if (ic->ic_opmode == IEEE80211_M_AHDEMO) { 1135219820Sjeff /* 1136219820Sjeff * Blindly propagate capabilities based on the 1137219820Sjeff * local configuration. In particular this permits 1138219820Sjeff * us to use QoS to disable ACK's. 1139219820Sjeff */ 1140219820Sjeff if (ic->ic_flags & IEEE80211_F_WME) 1141219820Sjeff ni->ni_flags |= IEEE80211_NODE_QOS; 1142219820Sjeff } 1143219820Sjeff } 1144219820Sjeff return ni; 1145219820Sjeff} 1146219820Sjeff 1147219820Sjeff#ifdef IEEE80211_DEBUG 1148219820Sjeffstatic void 1149219820Sjeffdump_probe_beacon(u_int8_t subtype, int isnew, 1150219820Sjeff const u_int8_t mac[IEEE80211_ADDR_LEN], 1151219820Sjeff const struct ieee80211_scanparams *sp) 1152219820Sjeff{ 1153219820Sjeff 1154219820Sjeff printf("[%s] %s%s on chan %u (bss chan %u) ", 1155219820Sjeff ether_sprintf(mac), isnew ? "new " : "", 1156219820Sjeff ieee80211_mgt_subtype_name[subtype >> IEEE80211_FC0_SUBTYPE_SHIFT], 1157219820Sjeff sp->chan, sp->bchan); 1158219820Sjeff ieee80211_print_essid(sp->ssid + 2, sp->ssid[1]); 1159219820Sjeff printf("\n"); 1160219820Sjeff 1161219820Sjeff if (isnew) { 1162219820Sjeff printf("[%s] caps 0x%x bintval %u erp 0x%x", 1163219820Sjeff ether_sprintf(mac), sp->capinfo, sp->bintval, sp->erp); 1164219820Sjeff if (sp->country != NULL) { 1165219820Sjeff#ifdef __FreeBSD__ 1166219820Sjeff printf(" country info %*D", 1167219820Sjeff sp->country[1], sp->country+2, " "); 1168219820Sjeff#else 1169219820Sjeff int i; 1170219820Sjeff printf(" country info"); 1171219820Sjeff for (i = 0; i < sp->country[1]; i++) 1172219820Sjeff printf(" %02x", sp->country[i+2]); 1173219820Sjeff#endif 1174219820Sjeff } 1175219820Sjeff printf("\n"); 1176219820Sjeff } 1177219820Sjeff} 1178219820Sjeff#endif /* IEEE80211_DEBUG */ 1179219820Sjeff 1180219820Sjeffstatic void 1181219820Sjeffsaveie(u_int8_t **iep, const u_int8_t *ie) 1182219820Sjeff{ 1183219820Sjeff 1184219820Sjeff if (ie == NULL) 1185219820Sjeff *iep = NULL; 1186219820Sjeff else 1187219820Sjeff ieee80211_saveie(iep, ie); 1188219820Sjeff} 1189219820Sjeff 1190219820Sjeff/* 1191219820Sjeff * Process a beacon or probe response frame. 1192219820Sjeff */ 1193219820Sjeffvoid 1194219820Sjeffieee80211_add_scan(struct ieee80211com *ic, 1195219820Sjeff const struct ieee80211_scanparams *sp, 1196219820Sjeff const struct ieee80211_frame *wh, 1197219820Sjeff int subtype, int rssi, int rstamp) 1198219820Sjeff{ 1199219820Sjeff#define ISPROBE(_st) ((_st) == IEEE80211_FC0_SUBTYPE_PROBE_RESP) 1200219820Sjeff struct ieee80211_node_table *nt = &ic->ic_scan; 1201219820Sjeff struct ieee80211_node *ni; 1202219820Sjeff int newnode = 0; 1203219820Sjeff 1204219820Sjeff ni = ieee80211_find_node(nt, wh->i_addr2); 1205219820Sjeff if (ni == NULL) { 1206219820Sjeff /* 1207219820Sjeff * Create a new entry. 1208219820Sjeff */ 1209219820Sjeff ni = ic->ic_node_alloc(nt); 1210219820Sjeff if (ni == NULL) { 1211219820Sjeff ic->ic_stats.is_rx_nodealloc++; 1212219820Sjeff return; 1213219820Sjeff } 1214219820Sjeff ieee80211_setup_node(nt, ni, wh->i_addr2); 1215219820Sjeff /* 1216219820Sjeff * XXX inherit from ic_bss. 1217219820Sjeff */ 1218219820Sjeff ni->ni_authmode = ic->ic_bss->ni_authmode; 1219219820Sjeff ni->ni_txpower = ic->ic_bss->ni_txpower; 1220219820Sjeff ni->ni_vlan = ic->ic_bss->ni_vlan; /* XXX?? */ 1221219820Sjeff ieee80211_set_chan(ic, ni, ic->ic_curchan); 1222219820Sjeff ni->ni_rsn = ic->ic_bss->ni_rsn; 1223219820Sjeff newnode = 1; 1224219820Sjeff } 1225219820Sjeff#ifdef IEEE80211_DEBUG 1226219820Sjeff if (ieee80211_msg_scan(ic) && (ic->ic_flags & IEEE80211_F_SCAN)) 1227219820Sjeff dump_probe_beacon(subtype, newnode, wh->i_addr2, sp); 1228219820Sjeff#endif 1229219820Sjeff /* XXX ap beaconing multiple ssid w/ same bssid */ 1230219820Sjeff if (sp->ssid[1] != 0 && 1231219820Sjeff (ISPROBE(subtype) || ni->ni_esslen == 0)) { 1232219820Sjeff ni->ni_esslen = sp->ssid[1]; 1233219820Sjeff memset(ni->ni_essid, 0, sizeof(ni->ni_essid)); 1234219820Sjeff memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]); 1235219820Sjeff } 1236219820Sjeff ni->ni_scangen = ic->ic_scan.nt_scangen; 1237219820Sjeff IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3); 1238219820Sjeff ni->ni_rssi = rssi; 1239219820Sjeff ni->ni_rstamp = rstamp; 1240219820Sjeff memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp)); 1241219820Sjeff ni->ni_intval = sp->bintval; 1242219820Sjeff ni->ni_capinfo = sp->capinfo; 1243219820Sjeff ni->ni_chan = &ic->ic_channels[sp->chan]; 1244219820Sjeff ni->ni_fhdwell = sp->fhdwell; 1245219820Sjeff ni->ni_fhindex = sp->fhindex; 1246219820Sjeff ni->ni_erp = sp->erp; 1247219820Sjeff if (sp->tim != NULL) { 1248219820Sjeff struct ieee80211_tim_ie *ie = 1249219820Sjeff (struct ieee80211_tim_ie *) sp->tim; 1250219820Sjeff 1251219820Sjeff ni->ni_dtim_count = ie->tim_count; 1252219820Sjeff ni->ni_dtim_period = ie->tim_period; 1253219820Sjeff } 1254219820Sjeff /* 1255219820Sjeff * Record the byte offset from the mac header to 1256219820Sjeff * the start of the TIM information element for 1257219820Sjeff * use by hardware and/or to speedup software 1258219820Sjeff * processing of beacon frames. 1259219820Sjeff */ 1260219820Sjeff ni->ni_timoff = sp->timoff; 1261219820Sjeff /* 1262219820Sjeff * Record optional information elements that might be 1263219820Sjeff * used by applications or drivers. 1264219820Sjeff */ 1265219820Sjeff saveie(&ni->ni_wme_ie, sp->wme); 1266219820Sjeff saveie(&ni->ni_wpa_ie, sp->wpa); 1267219820Sjeff 1268219820Sjeff /* NB: must be after ni_chan is setup */ 1269219820Sjeff ieee80211_setup_rates(ni, sp->rates, sp->xrates, IEEE80211_F_DOSORT); 1270219820Sjeff 1271219820Sjeff if (!newnode) 1272219820Sjeff ieee80211_free_node(ni); 1273219820Sjeff#undef ISPROBE 1274219820Sjeff} 1275219820Sjeff 1276219820Sjeffvoid 1277219820Sjeffieee80211_init_neighbor(struct ieee80211_node *ni, 1278219820Sjeff const struct ieee80211_frame *wh, 1279219820Sjeff const struct ieee80211_scanparams *sp) 1280219820Sjeff{ 1281219820Sjeff 1282219820Sjeff IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE, 1283219820Sjeff "%s: %p<%s>\n", __func__, ni, ether_sprintf(ni->ni_macaddr)); 1284219820Sjeff ni->ni_esslen = sp->ssid[1]; 1285219820Sjeff memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]); 1286219820Sjeff IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3); 1287219820Sjeff memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp)); 1288219820Sjeff ni->ni_intval = sp->bintval; 1289219820Sjeff ni->ni_capinfo = sp->capinfo; 1290219820Sjeff ni->ni_chan = ni->ni_ic->ic_curchan; 1291219820Sjeff ni->ni_fhdwell = sp->fhdwell; 1292219820Sjeff ni->ni_fhindex = sp->fhindex; 1293219820Sjeff ni->ni_erp = sp->erp; 1294219820Sjeff ni->ni_timoff = sp->timoff; 1295219820Sjeff if (sp->wme != NULL) 1296219820Sjeff ieee80211_saveie(&ni->ni_wme_ie, sp->wme); 1297219820Sjeff if (sp->wpa != NULL) 1298219820Sjeff ieee80211_saveie(&ni->ni_wpa_ie, sp->wpa); 1299219820Sjeff 1300219820Sjeff /* NB: must be after ni_chan is setup */ 1301219820Sjeff ieee80211_setup_rates(ni, sp->rates, sp->xrates, 1302219820Sjeff IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 1303219820Sjeff IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 1304219820Sjeff} 1305219820Sjeff 1306219820Sjeff/* 1307219820Sjeff * Do node discovery in adhoc mode on receipt of a beacon 1308219820Sjeff * or probe response frame. Note that for the driver's 1309219820Sjeff * benefit we we treat this like an association so the 1310219820Sjeff * driver has an opportunity to setup it's private state. 1311219820Sjeff */ 1312219820Sjeffstruct ieee80211_node * 1313219820Sjeffieee80211_add_neighbor(struct ieee80211com *ic, 1314219820Sjeff const struct ieee80211_frame *wh, 1315219820Sjeff const struct ieee80211_scanparams *sp) 1316219820Sjeff{ 1317219820Sjeff struct ieee80211_node *ni; 1318219820Sjeff 1319219820Sjeff IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1320219820Sjeff "%s: mac<%s>\n", __func__, ether_sprintf(wh->i_addr2)); 1321219820Sjeff ni = ieee80211_dup_bss(&ic->ic_sta, wh->i_addr2);/* XXX alloc_node? */ 1322219820Sjeff if (ni != NULL) { 1323219820Sjeff ieee80211_init_neighbor(ni, wh, sp); 1324219820Sjeff if (ic->ic_newassoc != NULL) 1325219820Sjeff ic->ic_newassoc(ni, 1); 1326219820Sjeff /* XXX not right for 802.1x/WPA */ 1327219820Sjeff ieee80211_node_authorize(ni); 1328219820Sjeff } 1329219820Sjeff return ni; 1330219820Sjeff} 1331219820Sjeff 1332219820Sjeff#define IS_CTL(wh) \ 1333219820Sjeff ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) == IEEE80211_FC0_TYPE_CTL) 1334219820Sjeff#define IS_PSPOLL(wh) \ 1335219820Sjeff ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == IEEE80211_FC0_SUBTYPE_PS_POLL) 1336219820Sjeff/* 1337219820Sjeff * Locate the node for sender, track state, and then pass the 1338 * (referenced) node up to the 802.11 layer for its use. We 1339 * are required to pass some node so we fall back to ic_bss 1340 * when this frame is from an unknown sender. The 802.11 layer 1341 * knows this means the sender wasn't in the node table and 1342 * acts accordingly. 1343 */ 1344struct ieee80211_node * 1345#ifdef IEEE80211_DEBUG_REFCNT 1346ieee80211_find_rxnode_debug(struct ieee80211com *ic, 1347 const struct ieee80211_frame_min *wh, const char *func, int line) 1348#else 1349ieee80211_find_rxnode(struct ieee80211com *ic, 1350 const struct ieee80211_frame_min *wh) 1351#endif 1352{ 1353 struct ieee80211_node_table *nt; 1354 struct ieee80211_node *ni; 1355 1356 /* XXX may want scanned nodes in the neighbor table for adhoc */ 1357 if (ic->ic_opmode == IEEE80211_M_STA || 1358 ic->ic_opmode == IEEE80211_M_MONITOR || 1359 (ic->ic_flags & IEEE80211_F_SCAN)) 1360 nt = &ic->ic_scan; 1361 else 1362 nt = &ic->ic_sta; 1363 /* XXX check ic_bss first in station mode */ 1364 /* XXX 4-address frames? */ 1365 IEEE80211_NODE_LOCK(nt); 1366 if (IS_CTL(wh) && !IS_PSPOLL(wh) /*&& !IS_RTS(ah)*/) 1367 ni = _ieee80211_find_node(nt, wh->i_addr1); 1368 else 1369 ni = _ieee80211_find_node(nt, wh->i_addr2); 1370 if (ni == NULL) 1371 ni = ieee80211_ref_node(ic->ic_bss); 1372 IEEE80211_NODE_UNLOCK(nt); 1373 1374 return ni; 1375} 1376 1377/* 1378 * Like ieee80211_find_rxnode but use the supplied h/w 1379 * key index as a hint to locate the node in the key 1380 * mapping table. If an entry is present at the key 1381 * index we return it; otherwise do a normal lookup and 1382 * update the mapping table if the station has a unicast 1383 * key assigned to it. 1384 */ 1385struct ieee80211_node * 1386#ifdef IEEE80211_DEBUG_REFCNT 1387ieee80211_find_rxnode_withkey_debug(struct ieee80211com *ic, 1388 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix, 1389 const char *func, int line) 1390#else 1391ieee80211_find_rxnode_withkey(struct ieee80211com *ic, 1392 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix) 1393#endif 1394{ 1395 struct ieee80211_node_table *nt; 1396 struct ieee80211_node *ni; 1397 1398 if (ic->ic_opmode == IEEE80211_M_STA || 1399 ic->ic_opmode == IEEE80211_M_MONITOR || 1400 (ic->ic_flags & IEEE80211_F_SCAN)) 1401 nt = &ic->ic_scan; 1402 else 1403 nt = &ic->ic_sta; 1404 IEEE80211_NODE_LOCK(nt); 1405 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) 1406 ni = nt->nt_keyixmap[keyix]; 1407 else 1408 ni = NULL; 1409 if (ni == NULL) { 1410 if (IS_CTL(wh) && !IS_PSPOLL(wh) /*&& !IS_RTS(ah)*/) 1411 ni = _ieee80211_find_node(nt, wh->i_addr1); 1412 else 1413 ni = _ieee80211_find_node(nt, wh->i_addr2); 1414 if (ni == NULL) 1415 ni = ieee80211_ref_node(ic->ic_bss); 1416 if (nt->nt_keyixmap != NULL) { 1417 /* 1418 * If the station has a unicast key cache slot 1419 * assigned update the key->node mapping table. 1420 */ 1421 keyix = ni->ni_ucastkey.wk_rxkeyix; 1422 /* XXX can keyixmap[keyix] != NULL? */ 1423 if (keyix < nt->nt_keyixmax && 1424 nt->nt_keyixmap[keyix] == NULL) { 1425 IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE, 1426 "%s: add key map entry %p<%s> refcnt %d\n", 1427 __func__, ni, ether_sprintf(ni->ni_macaddr), 1428 ieee80211_node_refcnt(ni)+1); 1429 nt->nt_keyixmap[keyix] = ieee80211_ref_node(ni); 1430 } 1431 } 1432 } else { 1433 ieee80211_ref_node(ni); 1434 } 1435 IEEE80211_NODE_UNLOCK(nt); 1436 1437 return ni; 1438} 1439#undef IS_PSPOLL 1440#undef IS_CTL 1441 1442/* 1443 * Return a reference to the appropriate node for sending 1444 * a data frame. This handles node discovery in adhoc networks. 1445 */ 1446struct ieee80211_node * 1447#ifdef IEEE80211_DEBUG_REFCNT 1448ieee80211_find_txnode_debug(struct ieee80211com *ic, const u_int8_t *macaddr, 1449 const char *func, int line) 1450#else 1451ieee80211_find_txnode(struct ieee80211com *ic, const u_int8_t *macaddr) 1452#endif 1453{ 1454 struct ieee80211_node_table *nt = &ic->ic_sta; 1455 struct ieee80211_node *ni; 1456 1457 /* 1458 * The destination address should be in the node table 1459 * unless this is a multicast/broadcast frame. We can 1460 * also optimize station mode operation, all frames go 1461 * to the bss node. 1462 */ 1463 /* XXX can't hold lock across dup_bss 'cuz of recursive locking */ 1464 IEEE80211_NODE_LOCK(nt); 1465 if (ic->ic_opmode == IEEE80211_M_STA || IEEE80211_IS_MULTICAST(macaddr)) 1466 ni = ieee80211_ref_node(ic->ic_bss); 1467 else { 1468 ni = _ieee80211_find_node(nt, macaddr); 1469 if (ic->ic_opmode == IEEE80211_M_HOSTAP && 1470 (ni != NULL && ni->ni_associd == 0)) { 1471 /* 1472 * Station is not associated; don't permit the 1473 * data frame to be sent by returning NULL. This 1474 * is kinda a kludge but the least intrusive way 1475 * to add this check into all drivers. 1476 */ 1477 ieee80211_unref_node(&ni); /* NB: null's ni */ 1478 } 1479 } 1480 IEEE80211_NODE_UNLOCK(nt); 1481 1482 if (ni == NULL) { 1483 if (ic->ic_opmode == IEEE80211_M_IBSS || 1484 ic->ic_opmode == IEEE80211_M_AHDEMO) { 1485 /* 1486 * In adhoc mode cons up a node for the destination. 1487 * Note that we need an additional reference for the 1488 * caller to be consistent with _ieee80211_find_node. 1489 */ 1490 ni = ieee80211_fakeup_adhoc_node(nt, macaddr); 1491 if (ni != NULL) 1492 (void) ieee80211_ref_node(ni); 1493 } else { 1494 IEEE80211_DPRINTF(ic, IEEE80211_MSG_OUTPUT, 1495 "[%s] no node, discard frame (%s)\n", 1496 ether_sprintf(macaddr), __func__); 1497 ic->ic_stats.is_tx_nonode++; 1498 } 1499 } 1500 return ni; 1501} 1502 1503/* 1504 * Like find but search based on the channel too. 1505 */ 1506struct ieee80211_node * 1507#ifdef IEEE80211_DEBUG_REFCNT 1508ieee80211_find_node_with_channel_debug(struct ieee80211_node_table *nt, 1509 const u_int8_t *macaddr, struct ieee80211_channel *chan, 1510 const char *func, int line) 1511#else 1512ieee80211_find_node_with_channel(struct ieee80211_node_table *nt, 1513 const u_int8_t *macaddr, struct ieee80211_channel *chan) 1514#endif 1515{ 1516 struct ieee80211_node *ni; 1517 int hash; 1518 1519 hash = IEEE80211_NODE_HASH(macaddr); 1520 IEEE80211_NODE_LOCK(nt); 1521 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1522 if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr) && 1523 ni->ni_chan == chan) { 1524 ieee80211_ref_node(ni); /* mark referenced */ 1525 IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE, 1526 REFCNT_LOC, ni, ether_sprintf(ni->ni_macaddr), 1527 ieee80211_node_refcnt(ni)); 1528 break; 1529 } 1530 } 1531 IEEE80211_NODE_UNLOCK(nt); 1532 return ni; 1533} 1534 1535/* 1536 * Like find but search based on the ssid too. 1537 */ 1538struct ieee80211_node * 1539#ifdef IEEE80211_DEBUG_REFCNT 1540ieee80211_find_node_with_ssid_debug(struct ieee80211_node_table *nt, 1541 const u_int8_t *macaddr, u_int ssidlen, const u_int8_t *ssid, 1542 const char *func, int line) 1543#else 1544ieee80211_find_node_with_ssid(struct ieee80211_node_table *nt, 1545 const u_int8_t *macaddr, u_int ssidlen, const u_int8_t *ssid) 1546#endif 1547{ 1548#define MATCH_SSID(ni, ssid, ssidlen) \ 1549 (ni->ni_esslen == ssidlen && memcmp(ni->ni_essid, ssid, ssidlen) == 0) 1550 static const u_int8_t zeromac[IEEE80211_ADDR_LEN]; 1551 struct ieee80211com *ic = nt->nt_ic; 1552 struct ieee80211_node *ni; 1553 int hash; 1554 1555 IEEE80211_NODE_LOCK(nt); 1556 /* 1557 * A mac address that is all zero means match only the ssid; 1558 * otherwise we must match both. 1559 */ 1560 if (IEEE80211_ADDR_EQ(macaddr, zeromac)) { 1561 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 1562 if (MATCH_SSID(ni, ssid, ssidlen)) 1563 break; 1564 } 1565 } else { 1566 hash = IEEE80211_NODE_HASH(macaddr); 1567 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1568 if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr) && 1569 MATCH_SSID(ni, ssid, ssidlen)) 1570 break; 1571 } 1572 } 1573 if (ni != NULL) { 1574 ieee80211_ref_node(ni); /* mark referenced */ 1575 IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1576 REFCNT_LOC, ni, ether_sprintf(ni->ni_macaddr), 1577 ieee80211_node_refcnt(ni)); 1578 } 1579 IEEE80211_NODE_UNLOCK(nt); 1580 return ni; 1581#undef MATCH_SSID 1582} 1583 1584static void 1585_ieee80211_free_node(struct ieee80211_node *ni) 1586{ 1587 struct ieee80211com *ic = ni->ni_ic; 1588 struct ieee80211_node_table *nt = ni->ni_table; 1589 1590 IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1591 "%s %p<%s> in %s table\n", __func__, ni, 1592 ether_sprintf(ni->ni_macaddr), 1593 nt != NULL ? nt->nt_name : "<gone>"); 1594 1595 IEEE80211_AID_CLR(ni->ni_associd, ic->ic_aid_bitmap); 1596 if (nt != NULL) { 1597 TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1598 LIST_REMOVE(ni, ni_hash); 1599 } 1600 ic->ic_node_free(ni); 1601} 1602 1603void 1604#ifdef IEEE80211_DEBUG_REFCNT 1605ieee80211_free_node_debug(struct ieee80211_node *ni, const char *func, int line) 1606#else 1607ieee80211_free_node(struct ieee80211_node *ni) 1608#endif 1609{ 1610 struct ieee80211_node_table *nt = ni->ni_table; 1611 1612#ifdef IEEE80211_DEBUG_REFCNT 1613 IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE, 1614 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni, 1615 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1); 1616#endif 1617 if (nt != NULL) { 1618 IEEE80211_NODE_LOCK(nt); 1619 if (ieee80211_node_dectestref(ni)) { 1620 /* 1621 * Last reference, reclaim state. 1622 */ 1623 _ieee80211_free_node(ni); 1624 } else if (ieee80211_node_refcnt(ni) == 1 && 1625 nt->nt_keyixmap != NULL) { 1626 ieee80211_keyix keyix; 1627 /* 1628 * Check for a last reference in the key mapping table. 1629 */ 1630 keyix = ni->ni_ucastkey.wk_rxkeyix; 1631 if (keyix < nt->nt_keyixmax && 1632 nt->nt_keyixmap[keyix] == ni) { 1633 IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE, 1634 "%s: %p<%s> clear key map entry", __func__, 1635 ni, ether_sprintf(ni->ni_macaddr)); 1636 nt->nt_keyixmap[keyix] = NULL; 1637 ieee80211_node_decref(ni); /* XXX needed? */ 1638 _ieee80211_free_node(ni); 1639 } 1640 } 1641 IEEE80211_NODE_UNLOCK(nt); 1642 } else { 1643 if (ieee80211_node_dectestref(ni)) 1644 _ieee80211_free_node(ni); 1645 } 1646} 1647 1648/* 1649 * Reclaim a unicast key and clear any key cache state. 1650 */ 1651int 1652ieee80211_node_delucastkey(struct ieee80211_node *ni) 1653{ 1654 struct ieee80211com *ic = ni->ni_ic; 1655 struct ieee80211_node_table *nt = &ic->ic_sta; 1656 struct ieee80211_node *nikey; 1657 ieee80211_keyix keyix; 1658 int isowned, status; 1659 1660 /* 1661 * NB: We must beware of LOR here; deleting the key 1662 * can cause the crypto layer to block traffic updates 1663 * which can generate a LOR against the node table lock; 1664 * grab it here and stash the key index for our use below. 1665 * 1666 * Must also beware of recursion on the node table lock. 1667 * When called from node_cleanup we may already have 1668 * the node table lock held. Unfortunately there's no 1669 * way to separate out this path so we must do this 1670 * conditionally. 1671 */ 1672 isowned = IEEE80211_NODE_IS_LOCKED(nt); 1673 if (!isowned) 1674 IEEE80211_NODE_LOCK(nt); 1675 keyix = ni->ni_ucastkey.wk_rxkeyix; 1676 status = ieee80211_crypto_delkey(ic, &ni->ni_ucastkey); 1677 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) { 1678 nikey = nt->nt_keyixmap[keyix]; 1679 nt->nt_keyixmap[keyix] = NULL;; 1680 } else 1681 nikey = NULL; 1682 if (!isowned) 1683 IEEE80211_NODE_UNLOCK(&ic->ic_sta); 1684 1685 if (nikey != NULL) { 1686 KASSERT(nikey == ni, 1687 ("key map out of sync, ni %p nikey %p", ni, nikey)); 1688 IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE, 1689 "%s: delete key map entry %p<%s> refcnt %d\n", 1690 __func__, ni, ether_sprintf(ni->ni_macaddr), 1691 ieee80211_node_refcnt(ni)-1); 1692 ieee80211_free_node(ni); 1693 } 1694 return status; 1695} 1696 1697/* 1698 * Reclaim a node. If this is the last reference count then 1699 * do the normal free work. Otherwise remove it from the node 1700 * table and mark it gone by clearing the back-reference. 1701 */ 1702static void 1703node_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 1704{ 1705 ieee80211_keyix keyix; 1706 1707 IEEE80211_NODE_LOCK_ASSERT(nt); 1708 1709 IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE, 1710 "%s: remove %p<%s> from %s table, refcnt %d\n", 1711 __func__, ni, ether_sprintf(ni->ni_macaddr), 1712 nt->nt_name, ieee80211_node_refcnt(ni)-1); 1713 /* 1714 * Clear any entry in the unicast key mapping table. 1715 * We need to do it here so rx lookups don't find it 1716 * in the mapping table even if it's not in the hash 1717 * table. We cannot depend on the mapping table entry 1718 * being cleared because the node may not be free'd. 1719 */ 1720 keyix = ni->ni_ucastkey.wk_rxkeyix; 1721 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax && 1722 nt->nt_keyixmap[keyix] == ni) { 1723 IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE, 1724 "%s: %p<%s> clear key map entry\n", 1725 __func__, ni, ether_sprintf(ni->ni_macaddr)); 1726 nt->nt_keyixmap[keyix] = NULL; 1727 ieee80211_node_decref(ni); /* NB: don't need free */ 1728 } 1729 if (!ieee80211_node_dectestref(ni)) { 1730 /* 1731 * Other references are present, just remove the 1732 * node from the table so it cannot be found. When 1733 * the references are dropped storage will be 1734 * reclaimed. 1735 */ 1736 TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1737 LIST_REMOVE(ni, ni_hash); 1738 ni->ni_table = NULL; /* clear reference */ 1739 } else 1740 _ieee80211_free_node(ni); 1741} 1742 1743static void 1744ieee80211_free_allnodes_locked(struct ieee80211_node_table *nt) 1745{ 1746 struct ieee80211com *ic = nt->nt_ic; 1747 struct ieee80211_node *ni; 1748 1749 IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1750 "%s: free all nodes in %s table\n", __func__, nt->nt_name); 1751 1752 while ((ni = TAILQ_FIRST(&nt->nt_node)) != NULL) { 1753 if (ni->ni_associd != 0) { 1754 if (ic->ic_auth->ia_node_leave != NULL) 1755 ic->ic_auth->ia_node_leave(ic, ni); 1756 IEEE80211_AID_CLR(ni->ni_associd, ic->ic_aid_bitmap); 1757 } 1758 node_reclaim(nt, ni); 1759 } 1760 ieee80211_reset_erp(ic); 1761} 1762 1763static void 1764ieee80211_free_allnodes(struct ieee80211_node_table *nt) 1765{ 1766 1767 IEEE80211_NODE_LOCK(nt); 1768 ieee80211_free_allnodes_locked(nt); 1769 IEEE80211_NODE_UNLOCK(nt); 1770} 1771 1772/* 1773 * Timeout entries in the scan cache. 1774 */ 1775static void 1776ieee80211_timeout_scan_candidates(struct ieee80211_node_table *nt) 1777{ 1778 struct ieee80211com *ic = nt->nt_ic; 1779 struct ieee80211_node *ni, *tni; 1780 1781 IEEE80211_NODE_LOCK(nt); 1782 ni = ic->ic_bss; 1783 /* XXX belongs elsewhere */ 1784 if (ni->ni_rxfrag[0] != NULL && ticks > ni->ni_rxfragstamp + hz) { 1785 m_freem(ni->ni_rxfrag[0]); 1786 ni->ni_rxfrag[0] = NULL; 1787 } 1788 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, tni) { 1789 if (ni->ni_inact && --ni->ni_inact == 0) { 1790 IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1791 "[%s] scan candidate purged from cache " 1792 "(refcnt %u)\n", ether_sprintf(ni->ni_macaddr), 1793 ieee80211_node_refcnt(ni)); 1794 node_reclaim(nt, ni); 1795 } 1796 } 1797 IEEE80211_NODE_UNLOCK(nt); 1798 1799 nt->nt_inact_timer = IEEE80211_INACT_WAIT; 1800} 1801 1802/* 1803 * Timeout inactive stations and do related housekeeping. 1804 * Note that we cannot hold the node lock while sending a 1805 * frame as this would lead to a LOR. Instead we use a 1806 * generation number to mark nodes that we've scanned and 1807 * drop the lock and restart a scan if we have to time out 1808 * a node. Since we are single-threaded by virtue of 1809 * controlling the inactivity timer we can be sure this will 1810 * process each node only once. 1811 */ 1812static void 1813ieee80211_timeout_stations(struct ieee80211_node_table *nt) 1814{ 1815 struct ieee80211com *ic = nt->nt_ic; 1816 struct ieee80211_node *ni; 1817 u_int gen; 1818 int isadhoc; 1819 1820 isadhoc = (ic->ic_opmode == IEEE80211_M_IBSS || 1821 ic->ic_opmode == IEEE80211_M_AHDEMO); 1822 IEEE80211_SCAN_LOCK(nt); 1823 gen = ++nt->nt_scangen; 1824 IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1825 "%s: %s scangen %u\n", __func__, nt->nt_name, gen); 1826restart: 1827 IEEE80211_NODE_LOCK(nt); 1828 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 1829 if (ni->ni_scangen == gen) /* previously handled */ 1830 continue; 1831 ni->ni_scangen = gen; 1832 /* 1833 * Ignore entries for which have yet to receive an 1834 * authentication frame. These are transient and 1835 * will be reclaimed when the last reference to them 1836 * goes away (when frame xmits complete). 1837 */ 1838 if (ic->ic_opmode == IEEE80211_M_HOSTAP && 1839 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 1840 continue; 1841 /* 1842 * Free fragment if not needed anymore 1843 * (last fragment older than 1s). 1844 * XXX doesn't belong here 1845 */ 1846 if (ni->ni_rxfrag[0] != NULL && 1847 ticks > ni->ni_rxfragstamp + hz) { 1848 m_freem(ni->ni_rxfrag[0]); 1849 ni->ni_rxfrag[0] = NULL; 1850 } 1851 /* 1852 * Special case ourself; we may be idle for extended periods 1853 * of time and regardless reclaiming our state is wrong. 1854 */ 1855 if (ni == ic->ic_bss) 1856 continue; 1857 ni->ni_inact--; 1858 if (ni->ni_associd != 0 || isadhoc) { 1859 /* 1860 * Age frames on the power save queue. The 1861 * aging interval is 4 times the listen 1862 * interval specified by the station. This 1863 * number is factored into the age calculations 1864 * when the frame is placed on the queue. We 1865 * store ages as time differences we can check 1866 * and/or adjust only the head of the list. 1867 */ 1868 if (IEEE80211_NODE_SAVEQ_QLEN(ni) != 0) { 1869 struct mbuf *m; 1870 int discard = 0; 1871 1872 IEEE80211_NODE_SAVEQ_LOCK(ni); 1873 while (IF_POLL(&ni->ni_savedq, m) != NULL && 1874 M_AGE_GET(m) < IEEE80211_INACT_WAIT) { 1875IEEE80211_DPRINTF(ic, IEEE80211_MSG_POWER, "[%s] discard frame, age %u\n", ether_sprintf(ni->ni_macaddr), M_AGE_GET(m));/*XXX*/ 1876 _IEEE80211_NODE_SAVEQ_DEQUEUE_HEAD(ni, m); 1877 m_freem(m); 1878 discard++; 1879 } 1880 if (m != NULL) 1881 M_AGE_SUB(m, IEEE80211_INACT_WAIT); 1882 IEEE80211_NODE_SAVEQ_UNLOCK(ni); 1883 1884 if (discard != 0) { 1885 IEEE80211_DPRINTF(ic, 1886 IEEE80211_MSG_POWER, 1887 "[%s] discard %u frames for age\n", 1888 ether_sprintf(ni->ni_macaddr), 1889 discard); 1890 IEEE80211_NODE_STAT_ADD(ni, 1891 ps_discard, discard); 1892 if (IEEE80211_NODE_SAVEQ_QLEN(ni) == 0) 1893 ic->ic_set_tim(ni, 0); 1894 } 1895 } 1896 /* 1897 * Probe the station before time it out. We 1898 * send a null data frame which may not be 1899 * universally supported by drivers (need it 1900 * for ps-poll support so it should be...). 1901 */ 1902 if (0 < ni->ni_inact && 1903 ni->ni_inact <= ic->ic_inact_probe) { 1904 IEEE80211_NOTE(ic, 1905 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, 1906 ni, "%s", 1907 "probe station due to inactivity"); 1908 /* 1909 * Grab a reference before unlocking the table 1910 * so the node cannot be reclaimed before we 1911 * send the frame. ieee80211_send_nulldata 1912 * understands we've done this and reclaims the 1913 * ref for us as needed. 1914 */ 1915 ieee80211_ref_node(ni); 1916 IEEE80211_NODE_UNLOCK(nt); 1917 ieee80211_send_nulldata(ni); 1918 /* XXX stat? */ 1919 goto restart; 1920 } 1921 } 1922 if (ni->ni_inact <= 0) { 1923 IEEE80211_NOTE(ic, 1924 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, ni, 1925 "station timed out due to inactivity " 1926 "(refcnt %u)", ieee80211_node_refcnt(ni)); 1927 /* 1928 * Send a deauthenticate frame and drop the station. 1929 * This is somewhat complicated due to reference counts 1930 * and locking. At this point a station will typically 1931 * have a reference count of 1. ieee80211_node_leave 1932 * will do a "free" of the node which will drop the 1933 * reference count. But in the meantime a reference 1934 * wil be held by the deauth frame. The actual reclaim 1935 * of the node will happen either after the tx is 1936 * completed or by ieee80211_node_leave. 1937 * 1938 * Separately we must drop the node lock before sending 1939 * in case the driver takes a lock, as this will result 1940 * in LOR between the node lock and the driver lock. 1941 */ 1942 IEEE80211_NODE_UNLOCK(nt); 1943 if (ni->ni_associd != 0) { 1944 IEEE80211_SEND_MGMT(ic, ni, 1945 IEEE80211_FC0_SUBTYPE_DEAUTH, 1946 IEEE80211_REASON_AUTH_EXPIRE); 1947 } 1948 ieee80211_node_leave(ic, ni); 1949 ic->ic_stats.is_node_timeout++; 1950 goto restart; 1951 } 1952 } 1953 IEEE80211_NODE_UNLOCK(nt); 1954 1955 IEEE80211_SCAN_UNLOCK(nt); 1956 1957 nt->nt_inact_timer = IEEE80211_INACT_WAIT; 1958} 1959 1960void 1961ieee80211_iterate_nodes(struct ieee80211_node_table *nt, ieee80211_iter_func *f, void *arg) 1962{ 1963 struct ieee80211_node *ni; 1964 u_int gen; 1965 1966 IEEE80211_SCAN_LOCK(nt); 1967 gen = ++nt->nt_scangen; 1968restart: 1969 IEEE80211_NODE_LOCK(nt); 1970 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 1971 if (ni->ni_scangen != gen) { 1972 ni->ni_scangen = gen; 1973 (void) ieee80211_ref_node(ni); 1974 IEEE80211_NODE_UNLOCK(nt); 1975 (*f)(arg, ni); 1976 ieee80211_free_node(ni); 1977 goto restart; 1978 } 1979 } 1980 IEEE80211_NODE_UNLOCK(nt); 1981 1982 IEEE80211_SCAN_UNLOCK(nt); 1983} 1984 1985void 1986ieee80211_dump_node(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 1987{ 1988 printf("0x%p: mac %s refcnt %d\n", ni, 1989 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)); 1990 printf("\tscangen %u authmode %u flags 0x%x\n", 1991 ni->ni_scangen, ni->ni_authmode, ni->ni_flags); 1992 printf("\tassocid 0x%x txpower %u vlan %u\n", 1993 ni->ni_associd, ni->ni_txpower, ni->ni_vlan); 1994 printf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n", 1995 ni->ni_txseqs[0], 1996 ni->ni_rxseqs[0] >> IEEE80211_SEQ_SEQ_SHIFT, 1997 ni->ni_rxseqs[0] & IEEE80211_SEQ_FRAG_MASK, 1998 ni->ni_rxfragstamp); 1999 printf("\trstamp %u rssi %u intval %u capinfo 0x%x\n", 2000 ni->ni_rstamp, ni->ni_rssi, ni->ni_intval, ni->ni_capinfo); 2001 printf("\tbssid %s essid \"%.*s\" channel %u:0x%x\n", 2002 ether_sprintf(ni->ni_bssid), 2003 ni->ni_esslen, ni->ni_essid, 2004 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags); 2005 printf("\tfails %u inact %u txrate %u\n", 2006 ni->ni_fails, ni->ni_inact, ni->ni_txrate); 2007} 2008 2009void 2010ieee80211_dump_nodes(struct ieee80211_node_table *nt) 2011{ 2012 ieee80211_iterate_nodes(nt, 2013 (ieee80211_iter_func *) ieee80211_dump_node, nt); 2014} 2015 2016/* 2017 * Handle a station joining an 11g network. 2018 */ 2019static void 2020ieee80211_node_join_11g(struct ieee80211com *ic, struct ieee80211_node *ni) 2021{ 2022 2023 /* 2024 * Station isn't capable of short slot time. Bump 2025 * the count of long slot time stations and disable 2026 * use of short slot time. Note that the actual switch 2027 * over to long slot time use may not occur until the 2028 * next beacon transmission (per sec. 7.3.1.4 of 11g). 2029 */ 2030 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2031 ic->ic_longslotsta++; 2032 IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 2033 "[%s] station needs long slot time, count %d\n", 2034 ether_sprintf(ni->ni_macaddr), ic->ic_longslotsta); 2035 /* XXX vap's w/ conflicting needs won't work */ 2036 ieee80211_set_shortslottime(ic, 0); 2037 } 2038 /* 2039 * If the new station is not an ERP station 2040 * then bump the counter and enable protection 2041 * if configured. 2042 */ 2043 if (!ieee80211_iserp_rateset(ic, &ni->ni_rates)) { 2044 ic->ic_nonerpsta++; 2045 IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 2046 "[%s] station is !ERP, %d non-ERP stations associated\n", 2047 ether_sprintf(ni->ni_macaddr), ic->ic_nonerpsta); 2048 /* 2049 * If protection is configured, enable it. 2050 */ 2051 if (ic->ic_protmode != IEEE80211_PROT_NONE) { 2052 IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 2053 "%s: enable use of protection\n", __func__); 2054 ic->ic_flags |= IEEE80211_F_USEPROT; 2055 } 2056 /* 2057 * If station does not support short preamble 2058 * then we must enable use of Barker preamble. 2059 */ 2060 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) { 2061 IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 2062 "[%s] station needs long preamble\n", 2063 ether_sprintf(ni->ni_macaddr)); 2064 ic->ic_flags |= IEEE80211_F_USEBARKER; 2065 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; 2066 } 2067 if (ic->ic_nonerpsta == 1) 2068 ic->ic_flags_ext |= IEEE80211_FEXT_ERPUPDATE; 2069 } else 2070 ni->ni_flags |= IEEE80211_NODE_ERP; 2071} 2072 2073void 2074ieee80211_node_join(struct ieee80211com *ic, struct ieee80211_node *ni, int resp) 2075{ 2076 int newassoc; 2077 2078 if (ni->ni_associd == 0) { 2079 u_int16_t aid; 2080 2081 /* 2082 * It would be good to search the bitmap 2083 * more efficiently, but this will do for now. 2084 */ 2085 for (aid = 1; aid < ic->ic_max_aid; aid++) { 2086 if (!IEEE80211_AID_ISSET(aid, 2087 ic->ic_aid_bitmap)) 2088 break; 2089 } 2090 if (aid >= ic->ic_max_aid) { 2091 IEEE80211_SEND_MGMT(ic, ni, resp, 2092 IEEE80211_REASON_ASSOC_TOOMANY); 2093 ieee80211_node_leave(ic, ni); 2094 return; 2095 } 2096 ni->ni_associd = aid | 0xc000; 2097 IEEE80211_AID_SET(ni->ni_associd, ic->ic_aid_bitmap); 2098 ic->ic_sta_assoc++; 2099 newassoc = 1; 2100 if (ic->ic_curmode == IEEE80211_MODE_11G) 2101 ieee80211_node_join_11g(ic, ni); 2102 } else 2103 newassoc = 0; 2104 2105 IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, 2106 "[%s] station %sassociated at aid %d: %s preamble, %s slot time%s%s\n", 2107 ether_sprintf(ni->ni_macaddr), newassoc ? "" : "re", 2108 IEEE80211_NODE_AID(ni), 2109 ic->ic_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long", 2110 ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long", 2111 ic->ic_flags & IEEE80211_F_USEPROT ? ", protection" : "", 2112 ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "" 2113 ); 2114 2115 /* give driver a chance to setup state like ni_txrate */ 2116 if (ic->ic_newassoc != NULL) 2117 ic->ic_newassoc(ni, newassoc); 2118 ni->ni_inact_reload = ic->ic_inact_auth; 2119 ni->ni_inact = ni->ni_inact_reload; 2120 IEEE80211_SEND_MGMT(ic, ni, resp, IEEE80211_STATUS_SUCCESS); 2121 /* tell the authenticator about new station */ 2122 if (ic->ic_auth->ia_node_join != NULL) 2123 ic->ic_auth->ia_node_join(ic, ni); 2124 ieee80211_notify_node_join(ic, ni, newassoc); 2125} 2126 2127/* 2128 * Handle a station leaving an 11g network. 2129 */ 2130static void 2131ieee80211_node_leave_11g(struct ieee80211com *ic, struct ieee80211_node *ni) 2132{ 2133 2134 KASSERT(ic->ic_curmode == IEEE80211_MODE_11G, 2135 ("not in 11g, bss %u:0x%x, curmode %u", ni->ni_chan->ic_freq, 2136 ni->ni_chan->ic_flags, ic->ic_curmode)); 2137 2138 /* 2139 * If a long slot station do the slot time bookkeeping. 2140 */ 2141 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2142 KASSERT(ic->ic_longslotsta > 0, 2143 ("bogus long slot station count %d", ic->ic_longslotsta)); 2144 ic->ic_longslotsta--; 2145 IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 2146 "[%s] long slot time station leaves, count now %d\n", 2147 ether_sprintf(ni->ni_macaddr), ic->ic_longslotsta); 2148 if (ic->ic_longslotsta == 0) { 2149 /* 2150 * Re-enable use of short slot time if supported 2151 * and not operating in IBSS mode (per spec). 2152 */ 2153 if ((ic->ic_caps & IEEE80211_C_SHSLOT) && 2154 ic->ic_opmode != IEEE80211_M_IBSS) { 2155 IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 2156 "%s: re-enable use of short slot time\n", 2157 __func__); 2158 ieee80211_set_shortslottime(ic, 1); 2159 } 2160 } 2161 } 2162 /* 2163 * If a non-ERP station do the protection-related bookkeeping. 2164 */ 2165 if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) { 2166 KASSERT(ic->ic_nonerpsta > 0, 2167 ("bogus non-ERP station count %d", ic->ic_nonerpsta)); 2168 ic->ic_nonerpsta--; 2169 IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 2170 "[%s] non-ERP station leaves, count now %d\n", 2171 ether_sprintf(ni->ni_macaddr), ic->ic_nonerpsta); 2172 if (ic->ic_nonerpsta == 0) { 2173 IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 2174 "%s: disable use of protection\n", __func__); 2175 ic->ic_flags &= ~IEEE80211_F_USEPROT; 2176 /* XXX verify mode? */ 2177 if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) { 2178 IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 2179 "%s: re-enable use of short preamble\n", 2180 __func__); 2181 ic->ic_flags |= IEEE80211_F_SHPREAMBLE; 2182 ic->ic_flags &= ~IEEE80211_F_USEBARKER; 2183 } 2184 ic->ic_flags_ext |= IEEE80211_FEXT_ERPUPDATE; 2185 } 2186 } 2187} 2188 2189/* 2190 * Handle bookkeeping for station deauthentication/disassociation 2191 * when operating as an ap. 2192 */ 2193void 2194ieee80211_node_leave(struct ieee80211com *ic, struct ieee80211_node *ni) 2195{ 2196 struct ieee80211_node_table *nt = ni->ni_table; 2197 2198 IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, 2199 "[%s] station with aid %d leaves\n", 2200 ether_sprintf(ni->ni_macaddr), IEEE80211_NODE_AID(ni)); 2201 2202 KASSERT(ic->ic_opmode == IEEE80211_M_HOSTAP || 2203 ic->ic_opmode == IEEE80211_M_IBSS || 2204 ic->ic_opmode == IEEE80211_M_AHDEMO, 2205 ("unexpected operating mode %u", ic->ic_opmode)); 2206 /* 2207 * If node wasn't previously associated all 2208 * we need to do is reclaim the reference. 2209 */ 2210 /* XXX ibss mode bypasses 11g and notification */ 2211 if (ni->ni_associd == 0) 2212 goto done; 2213 /* 2214 * Tell the authenticator the station is leaving. 2215 * Note that we must do this before yanking the 2216 * association id as the authenticator uses the 2217 * associd to locate it's state block. 2218 */ 2219 if (ic->ic_auth->ia_node_leave != NULL) 2220 ic->ic_auth->ia_node_leave(ic, ni); 2221 IEEE80211_AID_CLR(ni->ni_associd, ic->ic_aid_bitmap); 2222 ni->ni_associd = 0; 2223 ic->ic_sta_assoc--; 2224 2225 if (ic->ic_curmode == IEEE80211_MODE_11G) 2226 ieee80211_node_leave_11g(ic, ni); 2227 /* 2228 * Cleanup station state. In particular clear various 2229 * state that might otherwise be reused if the node 2230 * is reused before the reference count goes to zero 2231 * (and memory is reclaimed). 2232 */ 2233 ieee80211_sta_leave(ic, ni); 2234done: 2235 /* 2236 * Remove the node from any table it's recorded in and 2237 * drop the caller's reference. Removal from the table 2238 * is important to insure the node is not reprocessed 2239 * for inactivity. 2240 */ 2241 if (nt != NULL) { 2242 IEEE80211_NODE_LOCK(nt); 2243 node_reclaim(nt, ni); 2244 IEEE80211_NODE_UNLOCK(nt); 2245 } else 2246 ieee80211_free_node(ni); 2247} 2248 2249u_int8_t 2250ieee80211_getrssi(struct ieee80211com *ic) 2251{ 2252#define NZ(x) ((x) == 0 ? 1 : (x)) 2253 struct ieee80211_node_table *nt = &ic->ic_sta; 2254 u_int32_t rssi_samples, rssi_total; 2255 struct ieee80211_node *ni; 2256 2257 rssi_total = 0; 2258 rssi_samples = 0; 2259 switch (ic->ic_opmode) { 2260 case IEEE80211_M_IBSS: /* average of all ibss neighbors */ 2261 /* XXX locking */ 2262 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) 2263 if (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) { 2264 rssi_samples++; 2265 rssi_total += ic->ic_node_getrssi(ni); 2266 } 2267 break; 2268 case IEEE80211_M_AHDEMO: /* average of all neighbors */ 2269 /* XXX locking */ 2270 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2271 rssi_samples++; 2272 rssi_total += ic->ic_node_getrssi(ni); 2273 } 2274 break; 2275 case IEEE80211_M_HOSTAP: /* average of all associated stations */ 2276 /* XXX locking */ 2277 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) 2278 if (IEEE80211_AID(ni->ni_associd) != 0) { 2279 rssi_samples++; 2280 rssi_total += ic->ic_node_getrssi(ni); 2281 } 2282 break; 2283 case IEEE80211_M_MONITOR: /* XXX */ 2284 case IEEE80211_M_STA: /* use stats from associated ap */ 2285 default: 2286 if (ic->ic_bss != NULL) 2287 rssi_total = ic->ic_node_getrssi(ic->ic_bss); 2288 rssi_samples = 1; 2289 break; 2290 } 2291 return rssi_total / NZ(rssi_samples); 2292#undef NZ 2293} 2294 2295/* 2296 * Indicate whether there are frames queued for a station in power-save mode. 2297 */ 2298static void 2299ieee80211_set_tim(struct ieee80211_node *ni, int set) 2300{ 2301 struct ieee80211com *ic = ni->ni_ic; 2302 u_int16_t aid; 2303 2304 KASSERT(ic->ic_opmode == IEEE80211_M_HOSTAP || 2305 ic->ic_opmode == IEEE80211_M_IBSS, 2306 ("operating mode %u", ic->ic_opmode)); 2307 2308 aid = IEEE80211_AID(ni->ni_associd); 2309 KASSERT(aid < ic->ic_max_aid, 2310 ("bogus aid %u, max %u", aid, ic->ic_max_aid)); 2311 2312 IEEE80211_BEACON_LOCK(ic); 2313 if (set != (isset(ic->ic_tim_bitmap, aid) != 0)) { 2314 if (set) { 2315 setbit(ic->ic_tim_bitmap, aid); 2316 ic->ic_ps_pending++; 2317 } else { 2318 clrbit(ic->ic_tim_bitmap, aid); 2319 ic->ic_ps_pending--; 2320 } 2321 ic->ic_flags |= IEEE80211_F_TIMUPDATE; 2322 } 2323 IEEE80211_BEACON_UNLOCK(ic); 2324} 2325 2326/* 2327 * Node table support. 2328 */ 2329 2330static void 2331ieee80211_node_table_init(struct ieee80211com *ic, 2332 struct ieee80211_node_table *nt, 2333 const char *name, int inact, int keyixmax, 2334 void (*timeout)(struct ieee80211_node_table *)) 2335{ 2336 2337 IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 2338 "%s %s table, inact %u\n", __func__, name, inact); 2339 2340 nt->nt_ic = ic; 2341 /* XXX need unit */ 2342 IEEE80211_NODE_LOCK_INIT(nt, ic->ic_ifp->if_xname); 2343 IEEE80211_SCAN_LOCK_INIT(nt, ic->ic_ifp->if_xname); 2344 TAILQ_INIT(&nt->nt_node); 2345 nt->nt_name = name; 2346 nt->nt_scangen = 1; 2347 nt->nt_inact_init = inact; 2348 nt->nt_timeout = timeout; 2349 nt->nt_keyixmax = keyixmax; 2350 if (nt->nt_keyixmax > 0) { 2351 MALLOC(nt->nt_keyixmap, struct ieee80211_node **, 2352 keyixmax * sizeof(struct ieee80211_node *), 2353 M_80211_NODE, M_NOWAIT | M_ZERO); 2354 if (nt->nt_keyixmap == NULL) 2355 if_printf(ic->ic_ifp, 2356 "Cannot allocate key index map with %u entries\n", 2357 keyixmax); 2358 } else 2359 nt->nt_keyixmap = NULL; 2360} 2361 2362void 2363ieee80211_node_table_reset(struct ieee80211_node_table *nt) 2364{ 2365 2366 IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE, 2367 "%s %s table\n", __func__, nt->nt_name); 2368 2369 IEEE80211_NODE_LOCK(nt); 2370 nt->nt_inact_timer = 0; 2371 ieee80211_free_allnodes_locked(nt); 2372 IEEE80211_NODE_UNLOCK(nt); 2373} 2374 2375static void 2376ieee80211_node_table_cleanup(struct ieee80211_node_table *nt) 2377{ 2378 2379 IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE, 2380 "%s %s table\n", __func__, nt->nt_name); 2381 2382 IEEE80211_NODE_LOCK(nt); 2383 ieee80211_free_allnodes_locked(nt); 2384 if (nt->nt_keyixmap != NULL) { 2385 /* XXX verify all entries are NULL */ 2386 int i; 2387 for (i = 0; i < nt->nt_keyixmax; i++) 2388 if (nt->nt_keyixmap[i] != NULL) 2389 printf("%s: %s[%u] still active\n", __func__, 2390 nt->nt_name, i); 2391 FREE(nt->nt_keyixmap, M_80211_NODE); 2392 nt->nt_keyixmap = NULL; 2393 } 2394 IEEE80211_SCAN_LOCK_DESTROY(nt); 2395 IEEE80211_NODE_LOCK_DESTROY(nt); 2396} 2397