ieee80211_node.c revision 153403
1/*- 2 * Copyright (c) 2001 Atsushi Onoe 3 * Copyright (c) 2002-2005 Sam Leffler, Errno Consulting 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission. 16 * 17 * Alternatively, this software may be distributed under the terms of the 18 * GNU General Public License ("GPL") version 2 as published by the Free 19 * Software Foundation. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33#include <sys/cdefs.h> 34__FBSDID("$FreeBSD: head/sys/net80211/ieee80211_node.c 153403 2005-12-14 01:16:22Z sam $"); 35 36#include <sys/param.h> 37#include <sys/systm.h> 38#include <sys/mbuf.h> 39#include <sys/malloc.h> 40#include <sys/kernel.h> 41 42#include <sys/socket.h> 43 44#include <net/if.h> 45#include <net/if_media.h> 46#include <net/ethernet.h> 47 48#include <net80211/ieee80211_var.h> 49 50#include <net/bpf.h> 51 52/* 53 * Association id's are managed with a bit vector. 54 */ 55#define IEEE80211_AID_SET(b, w) \ 56 ((w)[IEEE80211_AID(b) / 32] |= (1 << (IEEE80211_AID(b) % 32))) 57#define IEEE80211_AID_CLR(b, w) \ 58 ((w)[IEEE80211_AID(b) / 32] &= ~(1 << (IEEE80211_AID(b) % 32))) 59#define IEEE80211_AID_ISSET(b, w) \ 60 ((w)[IEEE80211_AID(b) / 32] & (1 << (IEEE80211_AID(b) % 32))) 61 62static struct ieee80211_node *node_alloc(struct ieee80211_node_table *); 63static void node_cleanup(struct ieee80211_node *); 64static void node_free(struct ieee80211_node *); 65static u_int8_t node_getrssi(const struct ieee80211_node *); 66 67static void ieee80211_setup_node(struct ieee80211_node_table *, 68 struct ieee80211_node *, const u_int8_t *); 69static void _ieee80211_free_node(struct ieee80211_node *); 70static void ieee80211_free_allnodes(struct ieee80211_node_table *); 71 72static void ieee80211_timeout_scan_candidates(struct ieee80211_node_table *); 73static void ieee80211_timeout_stations(struct ieee80211_node_table *); 74 75static void ieee80211_set_tim(struct ieee80211_node *, int set); 76 77static void ieee80211_node_table_init(struct ieee80211com *ic, 78 struct ieee80211_node_table *nt, const char *name, 79 int inact, int keyixmax, 80 void (*timeout)(struct ieee80211_node_table *)); 81static void ieee80211_node_table_cleanup(struct ieee80211_node_table *nt); 82 83MALLOC_DEFINE(M_80211_NODE, "80211node", "802.11 node state"); 84 85void 86ieee80211_node_attach(struct ieee80211com *ic) 87{ 88 89 ic->ic_node_alloc = node_alloc; 90 ic->ic_node_free = node_free; 91 ic->ic_node_cleanup = node_cleanup; 92 ic->ic_node_getrssi = node_getrssi; 93 94 /* default station inactivity timer setings */ 95 ic->ic_inact_init = IEEE80211_INACT_INIT; 96 ic->ic_inact_auth = IEEE80211_INACT_AUTH; 97 ic->ic_inact_run = IEEE80211_INACT_RUN; 98 ic->ic_inact_probe = IEEE80211_INACT_PROBE; 99 100 /* NB: driver should override */ 101 ic->ic_max_aid = IEEE80211_AID_DEF; 102 ic->ic_set_tim = ieee80211_set_tim; 103} 104 105void 106ieee80211_node_lateattach(struct ieee80211com *ic) 107{ 108 struct ieee80211_rsnparms *rsn; 109 110 if (ic->ic_max_aid > IEEE80211_AID_MAX) 111 ic->ic_max_aid = IEEE80211_AID_MAX; 112 MALLOC(ic->ic_aid_bitmap, u_int32_t *, 113 howmany(ic->ic_max_aid, 32) * sizeof(u_int32_t), 114 M_DEVBUF, M_NOWAIT | M_ZERO); 115 if (ic->ic_aid_bitmap == NULL) { 116 /* XXX no way to recover */ 117 printf("%s: no memory for AID bitmap!\n", __func__); 118 ic->ic_max_aid = 0; 119 } 120 121 /* XXX defer until using hostap/ibss mode */ 122 ic->ic_tim_len = howmany(ic->ic_max_aid, 8) * sizeof(u_int8_t); 123 MALLOC(ic->ic_tim_bitmap, u_int8_t *, ic->ic_tim_len, 124 M_DEVBUF, M_NOWAIT | M_ZERO); 125 if (ic->ic_tim_bitmap == NULL) { 126 /* XXX no way to recover */ 127 printf("%s: no memory for TIM bitmap!\n", __func__); 128 } 129 130 ieee80211_node_table_init(ic, &ic->ic_sta, "station", 131 IEEE80211_INACT_INIT, ic->ic_crypto.cs_max_keyix, 132 ieee80211_timeout_stations); 133 ieee80211_node_table_init(ic, &ic->ic_scan, "scan", 134 IEEE80211_INACT_SCAN, 0, 135 ieee80211_timeout_scan_candidates); 136 137 ieee80211_reset_bss(ic); 138 /* 139 * Setup "global settings" in the bss node so that 140 * each new station automatically inherits them. 141 */ 142 rsn = &ic->ic_bss->ni_rsn; 143 /* WEP, TKIP, and AES-CCM are always supported */ 144 rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_WEP; 145 rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_TKIP; 146 rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_AES_CCM; 147 if (ic->ic_caps & IEEE80211_C_AES) 148 rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_AES_OCB; 149 if (ic->ic_caps & IEEE80211_C_CKIP) 150 rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_CKIP; 151 /* 152 * Default unicast cipher to WEP for 802.1x use. If 153 * WPA is enabled the management code will set these 154 * values to reflect. 155 */ 156 rsn->rsn_ucastcipher = IEEE80211_CIPHER_WEP; 157 rsn->rsn_ucastkeylen = 104 / NBBY; 158 /* 159 * WPA says the multicast cipher is the lowest unicast 160 * cipher supported. But we skip WEP which would 161 * otherwise be used based on this criteria. 162 */ 163 rsn->rsn_mcastcipher = IEEE80211_CIPHER_TKIP; 164 rsn->rsn_mcastkeylen = 128 / NBBY; 165 166 /* 167 * We support both WPA-PSK and 802.1x; the one used 168 * is determined by the authentication mode and the 169 * setting of the PSK state. 170 */ 171 rsn->rsn_keymgmtset = WPA_ASE_8021X_UNSPEC | WPA_ASE_8021X_PSK; 172 rsn->rsn_keymgmt = WPA_ASE_8021X_PSK; 173 174 ic->ic_auth = ieee80211_authenticator_get(ic->ic_bss->ni_authmode); 175} 176 177void 178ieee80211_node_detach(struct ieee80211com *ic) 179{ 180 181 if (ic->ic_bss != NULL) { 182 ieee80211_free_node(ic->ic_bss); 183 ic->ic_bss = NULL; 184 } 185 ieee80211_node_table_cleanup(&ic->ic_scan); 186 ieee80211_node_table_cleanup(&ic->ic_sta); 187 if (ic->ic_aid_bitmap != NULL) { 188 FREE(ic->ic_aid_bitmap, M_DEVBUF); 189 ic->ic_aid_bitmap = NULL; 190 } 191 if (ic->ic_tim_bitmap != NULL) { 192 FREE(ic->ic_tim_bitmap, M_DEVBUF); 193 ic->ic_tim_bitmap = NULL; 194 } 195} 196 197/* 198 * Port authorize/unauthorize interfaces for use by an authenticator. 199 */ 200 201void 202ieee80211_node_authorize(struct ieee80211_node *ni) 203{ 204 struct ieee80211com *ic = ni->ni_ic; 205 206 ni->ni_flags |= IEEE80211_NODE_AUTH; 207 ni->ni_inact_reload = ic->ic_inact_run; 208} 209 210void 211ieee80211_node_unauthorize(struct ieee80211_node *ni) 212{ 213 ni->ni_flags &= ~IEEE80211_NODE_AUTH; 214} 215 216/* 217 * Set/change the channel. The rate set is also updated as 218 * to insure a consistent view by drivers. 219 */ 220static void 221ieee80211_set_chan(struct ieee80211com *ic, 222 struct ieee80211_node *ni, struct ieee80211_channel *chan) 223{ 224 if (chan == IEEE80211_CHAN_ANYC) /* XXX while scanning */ 225 chan = ic->ic_curchan; 226 ni->ni_chan = chan; 227 ni->ni_rates = ic->ic_sup_rates[ieee80211_chan2mode(ic, chan)]; 228} 229 230/* 231 * AP scanning support. 232 */ 233 234#ifdef IEEE80211_DEBUG 235static void 236dump_chanlist(const u_char chans[]) 237{ 238 const char *sep; 239 int i; 240 241 sep = " "; 242 for (i = 0; i < IEEE80211_CHAN_MAX; i++) 243 if (isset(chans, i)) { 244 printf("%s%u", sep, i); 245 sep = ", "; 246 } 247} 248#endif /* IEEE80211_DEBUG */ 249 250/* 251 * Initialize the channel set to scan based on the 252 * of available channels and the current PHY mode. 253 */ 254static void 255ieee80211_reset_scan(struct ieee80211com *ic) 256{ 257 258 /* XXX ic_des_chan should be handled with ic_chan_active */ 259 if (ic->ic_des_chan != IEEE80211_CHAN_ANYC) { 260 memset(ic->ic_chan_scan, 0, sizeof(ic->ic_chan_scan)); 261 setbit(ic->ic_chan_scan, 262 ieee80211_chan2ieee(ic, ic->ic_des_chan)); 263 } else 264 memcpy(ic->ic_chan_scan, ic->ic_chan_active, 265 sizeof(ic->ic_chan_active)); 266#ifdef IEEE80211_DEBUG 267 if (ieee80211_msg_scan(ic)) { 268 printf("%s: scan set:", __func__); 269 dump_chanlist(ic->ic_chan_scan); 270 printf(" start chan %u\n", 271 ieee80211_chan2ieee(ic, ic->ic_curchan)); 272 } 273#endif /* IEEE80211_DEBUG */ 274} 275 276/* 277 * Begin an active scan. 278 */ 279void 280ieee80211_begin_scan(struct ieee80211com *ic, int reset) 281{ 282 283 ic->ic_scan.nt_scangen++; 284 /* 285 * In all but hostap mode scanning starts off in 286 * an active mode before switching to passive. 287 */ 288 if (ic->ic_opmode != IEEE80211_M_HOSTAP) { 289 ic->ic_flags |= IEEE80211_F_ASCAN; 290 ic->ic_stats.is_scan_active++; 291 } else 292 ic->ic_stats.is_scan_passive++; 293 IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, 294 "begin %s scan in %s mode, scangen %u\n", 295 (ic->ic_flags & IEEE80211_F_ASCAN) ? "active" : "passive", 296 ieee80211_phymode_name[ic->ic_curmode], ic->ic_scan.nt_scangen); 297 /* 298 * Clear scan state and flush any previously seen AP's. 299 */ 300 ieee80211_reset_scan(ic); 301 if (reset) 302 ieee80211_free_allnodes(&ic->ic_scan); 303 304 ic->ic_flags |= IEEE80211_F_SCAN; 305 306 /* Scan the next channel. */ 307 ieee80211_next_scan(ic); 308} 309 310/* 311 * Switch to the next channel marked for scanning. 312 */ 313int 314ieee80211_next_scan(struct ieee80211com *ic) 315{ 316 struct ieee80211_channel *chan; 317 318 /* 319 * Insure any previous mgt frame timeouts don't fire. 320 * This assumes the driver does the right thing in 321 * flushing anything queued in the driver and below. 322 */ 323 ic->ic_mgt_timer = 0; 324 325 chan = ic->ic_curchan; 326 do { 327 if (++chan > &ic->ic_channels[IEEE80211_CHAN_MAX]) 328 chan = &ic->ic_channels[0]; 329 if (isset(ic->ic_chan_scan, ieee80211_chan2ieee(ic, chan))) { 330 clrbit(ic->ic_chan_scan, ieee80211_chan2ieee(ic, chan)); 331 IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, 332 "%s: chan %d->%d\n", __func__, 333 ieee80211_chan2ieee(ic, ic->ic_curchan), 334 ieee80211_chan2ieee(ic, chan)); 335 ic->ic_curchan = chan; 336 /* 337 * XXX drivers should do this as needed, 338 * XXX for now maintain compatibility 339 */ 340 ic->ic_bss->ni_rates = 341 ic->ic_sup_rates[ieee80211_chan2mode(ic, chan)]; 342 ieee80211_new_state(ic, IEEE80211_S_SCAN, -1); 343 return 1; 344 } 345 } while (chan != ic->ic_curchan); 346 ieee80211_end_scan(ic); 347 return 0; 348} 349 350static __inline void 351copy_bss(struct ieee80211_node *nbss, const struct ieee80211_node *obss) 352{ 353 /* propagate useful state */ 354 nbss->ni_authmode = obss->ni_authmode; 355 nbss->ni_txpower = obss->ni_txpower; 356 nbss->ni_vlan = obss->ni_vlan; 357 nbss->ni_rsn = obss->ni_rsn; 358 /* XXX statistics? */ 359} 360 361void 362ieee80211_create_ibss(struct ieee80211com* ic, struct ieee80211_channel *chan) 363{ 364 struct ieee80211_node_table *nt; 365 struct ieee80211_node *ni; 366 367 IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, 368 "%s: creating ibss\n", __func__); 369 370 /* 371 * Create the station/neighbor table. Note that for adhoc 372 * mode we make the initial inactivity timer longer since 373 * we create nodes only through discovery and they typically 374 * are long-lived associations. 375 */ 376 nt = &ic->ic_sta; 377 IEEE80211_NODE_LOCK(nt); 378 if (ic->ic_opmode == IEEE80211_M_HOSTAP) { 379 nt->nt_name = "station"; 380 nt->nt_inact_init = ic->ic_inact_init; 381 } else { 382 nt->nt_name = "neighbor"; 383 nt->nt_inact_init = ic->ic_inact_run; 384 } 385 IEEE80211_NODE_UNLOCK(nt); 386 387 ni = ieee80211_alloc_node(&ic->ic_sta, ic->ic_myaddr); 388 if (ni == NULL) { 389 /* XXX recovery? */ 390 return; 391 } 392 IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_myaddr); 393 ni->ni_esslen = ic->ic_des_esslen; 394 memcpy(ni->ni_essid, ic->ic_des_essid, ni->ni_esslen); 395 copy_bss(ni, ic->ic_bss); 396 ni->ni_intval = ic->ic_bintval; 397 if (ic->ic_flags & IEEE80211_F_PRIVACY) 398 ni->ni_capinfo |= IEEE80211_CAPINFO_PRIVACY; 399 if (ic->ic_phytype == IEEE80211_T_FH) { 400 ni->ni_fhdwell = 200; /* XXX */ 401 ni->ni_fhindex = 1; 402 } 403 if (ic->ic_opmode == IEEE80211_M_IBSS) { 404 ic->ic_flags |= IEEE80211_F_SIBSS; 405 ni->ni_capinfo |= IEEE80211_CAPINFO_IBSS; /* XXX */ 406 if (ic->ic_flags & IEEE80211_F_DESBSSID) 407 IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_des_bssid); 408 else 409 ni->ni_bssid[0] |= 0x02; /* local bit for IBSS */ 410 } else if (ic->ic_opmode == IEEE80211_M_AHDEMO) { 411 if (ic->ic_flags & IEEE80211_F_DESBSSID) 412 IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_des_bssid); 413 else 414 memset(ni->ni_bssid, 0, IEEE80211_ADDR_LEN); 415 } 416 /* 417 * Fix the channel and related attributes. 418 */ 419 ieee80211_set_chan(ic, ni, chan); 420 ic->ic_curchan = chan; 421 ic->ic_curmode = ieee80211_chan2mode(ic, chan); 422 /* 423 * Do mode-specific rate setup. 424 */ 425 if (ic->ic_curmode == IEEE80211_MODE_11G) { 426 /* 427 * Use a mixed 11b/11g rate set. 428 */ 429 ieee80211_set11gbasicrates(&ni->ni_rates, IEEE80211_MODE_11G); 430 } else if (ic->ic_curmode == IEEE80211_MODE_11B) { 431 /* 432 * Force pure 11b rate set. 433 */ 434 ieee80211_set11gbasicrates(&ni->ni_rates, IEEE80211_MODE_11B); 435 } 436 437 (void) ieee80211_sta_join(ic, ieee80211_ref_node(ni)); 438} 439 440void 441ieee80211_reset_bss(struct ieee80211com *ic) 442{ 443 struct ieee80211_node *ni, *obss; 444 445 ieee80211_node_table_reset(&ic->ic_scan); 446 ieee80211_node_table_reset(&ic->ic_sta); 447 448 ni = ieee80211_alloc_node(&ic->ic_scan, ic->ic_myaddr); 449 KASSERT(ni != NULL, ("unable to setup inital BSS node")); 450 obss = ic->ic_bss; 451 ic->ic_bss = ieee80211_ref_node(ni); 452 if (obss != NULL) { 453 copy_bss(ni, obss); 454 ni->ni_intval = ic->ic_bintval; 455 ieee80211_free_node(obss); 456 } 457} 458 459/* XXX tunable */ 460#define STA_FAILS_MAX 2 /* assoc failures before ignored */ 461 462static int 463ieee80211_match_bss(struct ieee80211com *ic, struct ieee80211_node *ni) 464{ 465 u_int8_t rate; 466 int fail; 467 468 fail = 0; 469 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 470 fail |= 0x01; 471 if (ic->ic_des_chan != IEEE80211_CHAN_ANYC && 472 ni->ni_chan != ic->ic_des_chan) 473 fail |= 0x01; 474 if (ic->ic_opmode == IEEE80211_M_IBSS) { 475 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 476 fail |= 0x02; 477 } else { 478 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 479 fail |= 0x02; 480 } 481 if (ic->ic_flags & IEEE80211_F_PRIVACY) { 482 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 483 fail |= 0x04; 484 } else { 485 /* XXX does this mean privacy is supported or required? */ 486 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 487 fail |= 0x04; 488 } 489 rate = ieee80211_fix_rate(ni, IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 490 if (rate & IEEE80211_RATE_BASIC) 491 fail |= 0x08; 492 if (ic->ic_des_esslen != 0 && 493 (ni->ni_esslen != ic->ic_des_esslen || 494 memcmp(ni->ni_essid, ic->ic_des_essid, ic->ic_des_esslen) != 0)) 495 fail |= 0x10; 496 if ((ic->ic_flags & IEEE80211_F_DESBSSID) && 497 !IEEE80211_ADDR_EQ(ic->ic_des_bssid, ni->ni_bssid)) 498 fail |= 0x20; 499 if (ni->ni_fails >= STA_FAILS_MAX) 500 fail |= 0x40; 501#ifdef IEEE80211_DEBUG 502 if (ieee80211_msg_scan(ic)) { 503 printf(" %c %s", 504 fail & 0x40 ? '=' : fail & 0x80 ? '^' : fail ? '-' : '+', 505 ether_sprintf(ni->ni_macaddr)); 506 printf(" %s%c", ether_sprintf(ni->ni_bssid), 507 fail & 0x20 ? '!' : ' '); 508 printf(" %3d%c", ieee80211_chan2ieee(ic, ni->ni_chan), 509 fail & 0x01 ? '!' : ' '); 510 printf(" %+4d", ni->ni_rssi); 511 printf(" %2dM%c", (rate & IEEE80211_RATE_VAL) / 2, 512 fail & 0x08 ? '!' : ' '); 513 printf(" %4s%c", 514 (ni->ni_capinfo & IEEE80211_CAPINFO_ESS) ? "ess" : 515 (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) ? "ibss" : 516 "????", 517 fail & 0x02 ? '!' : ' '); 518 printf(" %3s%c ", 519 (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) ? 520 "wep" : "no", 521 fail & 0x04 ? '!' : ' '); 522 ieee80211_print_essid(ni->ni_essid, ni->ni_esslen); 523 printf("%s\n", fail & 0x10 ? "!" : ""); 524 } 525#endif 526 return fail; 527} 528 529static __inline u_int8_t 530maxrate(const struct ieee80211_node *ni) 531{ 532 const struct ieee80211_rateset *rs = &ni->ni_rates; 533 /* NB: assumes rate set is sorted (happens on frame receive) */ 534 return rs->rs_rates[rs->rs_nrates-1] & IEEE80211_RATE_VAL; 535} 536 537/* 538 * Compare the capabilities of two nodes and decide which is 539 * more desirable (return >0 if a is considered better). Note 540 * that we assume compatibility/usability has already been checked 541 * so we don't need to (e.g. validate whether privacy is supported). 542 * Used to select the best scan candidate for association in a BSS. 543 */ 544static int 545ieee80211_node_compare(struct ieee80211com *ic, 546 const struct ieee80211_node *a, 547 const struct ieee80211_node *b) 548{ 549 u_int8_t maxa, maxb; 550 u_int8_t rssia, rssib; 551 int weight; 552 553 /* privacy support preferred */ 554 if ((a->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) && 555 (b->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 556 return 1; 557 if ((a->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0 && 558 (b->ni_capinfo & IEEE80211_CAPINFO_PRIVACY)) 559 return -1; 560 561 /* compare count of previous failures */ 562 weight = b->ni_fails - a->ni_fails; 563 if (abs(weight) > 1) 564 return weight; 565 566 rssia = ic->ic_node_getrssi(a); 567 rssib = ic->ic_node_getrssi(b); 568 if (abs(rssib - rssia) < 5) { 569 /* best/max rate preferred if signal level close enough XXX */ 570 maxa = maxrate(a); 571 maxb = maxrate(b); 572 if (maxa != maxb) 573 return maxa - maxb; 574 /* XXX use freq for channel preference */ 575 /* for now just prefer 5Ghz band to all other bands */ 576 if (IEEE80211_IS_CHAN_5GHZ(a->ni_chan) && 577 !IEEE80211_IS_CHAN_5GHZ(b->ni_chan)) 578 return 1; 579 if (!IEEE80211_IS_CHAN_5GHZ(a->ni_chan) && 580 IEEE80211_IS_CHAN_5GHZ(b->ni_chan)) 581 return -1; 582 } 583 /* all things being equal, use signal level */ 584 return rssia - rssib; 585} 586 587/* 588 * Mark an ongoing scan stopped. 589 */ 590void 591ieee80211_cancel_scan(struct ieee80211com *ic) 592{ 593 594 IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, "%s: end %s scan\n", 595 __func__, 596 (ic->ic_flags & IEEE80211_F_ASCAN) ? "active" : "passive"); 597 598 ic->ic_flags &= ~(IEEE80211_F_SCAN | IEEE80211_F_ASCAN); 599} 600 601/* 602 * Complete a scan of potential channels. 603 */ 604void 605ieee80211_end_scan(struct ieee80211com *ic) 606{ 607 struct ieee80211_node_table *nt = &ic->ic_scan; 608 struct ieee80211_node *ni, *selbs; 609 610 ieee80211_cancel_scan(ic); 611 ieee80211_notify_scan_done(ic); 612 613 if (ic->ic_opmode == IEEE80211_M_HOSTAP) { 614 u_int8_t maxrssi[IEEE80211_CHAN_MAX]; /* XXX off stack? */ 615 int i, bestchan; 616 u_int8_t rssi; 617 618 /* 619 * The passive scan to look for existing AP's completed, 620 * select a channel to camp on. Identify the channels 621 * that already have one or more AP's and try to locate 622 * an unoccupied one. If that fails, pick a channel that 623 * looks to be quietest. 624 */ 625 memset(maxrssi, 0, sizeof(maxrssi)); 626 IEEE80211_NODE_LOCK(nt); 627 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 628 rssi = ic->ic_node_getrssi(ni); 629 i = ieee80211_chan2ieee(ic, ni->ni_chan); 630 if (rssi > maxrssi[i]) 631 maxrssi[i] = rssi; 632 } 633 IEEE80211_NODE_UNLOCK(nt); 634 /* XXX select channel more intelligently */ 635 bestchan = -1; 636 for (i = 0; i < IEEE80211_CHAN_MAX; i++) 637 if (isset(ic->ic_chan_active, i)) { 638 /* 639 * If the channel is unoccupied the max rssi 640 * should be zero; just take it. Otherwise 641 * track the channel with the lowest rssi and 642 * use that when all channels appear occupied. 643 */ 644 if (maxrssi[i] == 0) { 645 bestchan = i; 646 break; 647 } 648 if (bestchan == -1 || 649 maxrssi[i] < maxrssi[bestchan]) 650 bestchan = i; 651 } 652 if (bestchan != -1) { 653 ieee80211_create_ibss(ic, &ic->ic_channels[bestchan]); 654 return; 655 } 656 /* no suitable channel, should not happen */ 657 } 658 659 /* 660 * When manually sequencing the state machine; scan just once 661 * regardless of whether we have a candidate or not. The 662 * controlling application is expected to setup state and 663 * initiate an association. 664 */ 665 if (ic->ic_roaming == IEEE80211_ROAMING_MANUAL) 666 return; 667 /* 668 * Automatic sequencing; look for a candidate and 669 * if found join the network. 670 */ 671 /* NB: unlocked read should be ok */ 672 if (TAILQ_FIRST(&nt->nt_node) == NULL) { 673 IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, 674 "%s: no scan candidate\n", __func__); 675 notfound: 676 if (ic->ic_opmode == IEEE80211_M_IBSS && 677 (ic->ic_flags & IEEE80211_F_IBSSON) && 678 ic->ic_des_esslen != 0) { 679 ieee80211_create_ibss(ic, ic->ic_ibss_chan); 680 return; 681 } 682 /* 683 * Decrement the failure counts so entries will be 684 * reconsidered the next time around. We really want 685 * to do this only for sta's where we've previously 686 * had some success. 687 */ 688 IEEE80211_NODE_LOCK(nt); 689 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) 690 if (ni->ni_fails) 691 ni->ni_fails--; 692 IEEE80211_NODE_UNLOCK(nt); 693 /* 694 * Reset the list of channels to scan and start again. 695 */ 696 ieee80211_reset_scan(ic); 697 ic->ic_flags |= IEEE80211_F_SCAN; 698 ieee80211_next_scan(ic); 699 return; 700 } 701 selbs = NULL; 702 IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, "\t%s\n", 703 "macaddr bssid chan rssi rate flag wep essid"); 704 IEEE80211_NODE_LOCK(nt); 705 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 706 if (ieee80211_match_bss(ic, ni) == 0) { 707 if (selbs == NULL) 708 selbs = ni; 709 else if (ieee80211_node_compare(ic, ni, selbs) > 0) 710 selbs = ni; 711 } 712 } 713 if (selbs != NULL) /* NB: grab ref while dropping lock */ 714 (void) ieee80211_ref_node(selbs); 715 IEEE80211_NODE_UNLOCK(nt); 716 if (selbs == NULL) 717 goto notfound; 718 if (!ieee80211_sta_join(ic, selbs)) { 719 ieee80211_free_node(selbs); 720 goto notfound; 721 } 722} 723 724/* 725 * Handle 802.11 ad hoc network merge. The 726 * convention, set by the Wireless Ethernet Compatibility Alliance 727 * (WECA), is that an 802.11 station will change its BSSID to match 728 * the "oldest" 802.11 ad hoc network, on the same channel, that 729 * has the station's desired SSID. The "oldest" 802.11 network 730 * sends beacons with the greatest TSF timestamp. 731 * 732 * The caller is assumed to validate TSF's before attempting a merge. 733 * 734 * Return !0 if the BSSID changed, 0 otherwise. 735 */ 736int 737ieee80211_ibss_merge(struct ieee80211_node *ni) 738{ 739 struct ieee80211com *ic = ni->ni_ic; 740 741 if (ni == ic->ic_bss || 742 IEEE80211_ADDR_EQ(ni->ni_bssid, ic->ic_bss->ni_bssid)) { 743 /* unchanged, nothing to do */ 744 return 0; 745 } 746 if (ieee80211_match_bss(ic, ni) != 0) { /* capabilities mismatch */ 747 IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 748 "%s: merge failed, capabilities mismatch\n", __func__); 749 ic->ic_stats.is_ibss_capmismatch++; 750 return 0; 751 } 752 IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 753 "%s: new bssid %s: %s preamble, %s slot time%s\n", __func__, 754 ether_sprintf(ni->ni_bssid), 755 ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long", 756 ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long", 757 ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : "" 758 ); 759 return ieee80211_sta_join(ic, ieee80211_ref_node(ni)); 760} 761 762/* 763 * Join the specified IBSS/BSS network. The node is assumed to 764 * be passed in with a held reference. 765 */ 766int 767ieee80211_sta_join(struct ieee80211com *ic, struct ieee80211_node *selbs) 768{ 769 struct ieee80211_node *obss; 770 771 if (ic->ic_opmode == IEEE80211_M_IBSS) { 772 struct ieee80211_node_table *nt; 773 /* 774 * Delete unusable rates; we've already checked 775 * that the negotiated rate set is acceptable. 776 */ 777 ieee80211_fix_rate(selbs, IEEE80211_F_DODEL); 778 /* 779 * Fillin the neighbor table; it will already 780 * exist if we are simply switching mastership. 781 * XXX ic_sta always setup so this is unnecessary? 782 */ 783 nt = &ic->ic_sta; 784 IEEE80211_NODE_LOCK(nt); 785 nt->nt_name = "neighbor"; 786 nt->nt_inact_init = ic->ic_inact_run; 787 IEEE80211_NODE_UNLOCK(nt); 788 } 789 790 /* 791 * Committed to selbs, setup state. 792 */ 793 obss = ic->ic_bss; 794 ic->ic_bss = selbs; /* NB: caller assumed to bump refcnt */ 795 if (obss != NULL) { 796 copy_bss(selbs, obss); 797 ieee80211_free_node(obss); 798 } 799 /* 800 * Set the erp state (mostly the slot time) to deal with 801 * the auto-select case; this should be redundant if the 802 * mode is locked. 803 */ 804 ic->ic_curmode = ieee80211_chan2mode(ic, selbs->ni_chan); 805 ic->ic_curchan = selbs->ni_chan; 806 ieee80211_reset_erp(ic); 807 ieee80211_wme_initparams(ic); 808 809 if (ic->ic_opmode == IEEE80211_M_STA) 810 ieee80211_new_state(ic, IEEE80211_S_AUTH, -1); 811 else 812 ieee80211_new_state(ic, IEEE80211_S_RUN, -1); 813 return 1; 814} 815 816/* 817 * Leave the specified IBSS/BSS network. The node is assumed to 818 * be passed in with a held reference. 819 */ 820void 821ieee80211_sta_leave(struct ieee80211com *ic, struct ieee80211_node *ni) 822{ 823 ic->ic_node_cleanup(ni); 824 ieee80211_notify_node_leave(ic, ni); 825} 826 827static struct ieee80211_node * 828node_alloc(struct ieee80211_node_table *nt) 829{ 830 struct ieee80211_node *ni; 831 832 MALLOC(ni, struct ieee80211_node *, sizeof(struct ieee80211_node), 833 M_80211_NODE, M_NOWAIT | M_ZERO); 834 return ni; 835} 836 837/* 838 * Reclaim any resources in a node and reset any critical 839 * state. Typically nodes are free'd immediately after, 840 * but in some cases the storage may be reused so we need 841 * to insure consistent state (should probably fix that). 842 */ 843static void 844node_cleanup(struct ieee80211_node *ni) 845{ 846#define N(a) (sizeof(a)/sizeof(a[0])) 847 struct ieee80211com *ic = ni->ni_ic; 848 int i, qlen; 849 850 /* NB: preserve ni_table */ 851 if (ni->ni_flags & IEEE80211_NODE_PWR_MGT) { 852 ic->ic_ps_sta--; 853 ni->ni_flags &= ~IEEE80211_NODE_PWR_MGT; 854 IEEE80211_DPRINTF(ic, IEEE80211_MSG_POWER, 855 "[%s] power save mode off, %u sta's in ps mode\n", 856 ether_sprintf(ni->ni_macaddr), ic->ic_ps_sta); 857 } 858 /* 859 * Clear AREF flag that marks the authorization refcnt bump 860 * has happened. This is probably not needed as the node 861 * should always be removed from the table so not found but 862 * do it just in case. 863 */ 864 ni->ni_flags &= ~IEEE80211_NODE_AREF; 865 866 /* 867 * Drain power save queue and, if needed, clear TIM. 868 */ 869 IEEE80211_NODE_SAVEQ_DRAIN(ni, qlen); 870 if (qlen != 0 && ic->ic_set_tim != NULL) 871 ic->ic_set_tim(ni, 0); 872 873 ni->ni_associd = 0; 874 if (ni->ni_challenge != NULL) { 875 FREE(ni->ni_challenge, M_DEVBUF); 876 ni->ni_challenge = NULL; 877 } 878 /* 879 * Preserve SSID, WPA, and WME ie's so the bss node is 880 * reusable during a re-auth/re-assoc state transition. 881 * If we remove these data they will not be recreated 882 * because they come from a probe-response or beacon frame 883 * which cannot be expected prior to the association-response. 884 * This should not be an issue when operating in other modes 885 * as stations leaving always go through a full state transition 886 * which will rebuild this state. 887 * 888 * XXX does this leave us open to inheriting old state? 889 */ 890 for (i = 0; i < N(ni->ni_rxfrag); i++) 891 if (ni->ni_rxfrag[i] != NULL) { 892 m_freem(ni->ni_rxfrag[i]); 893 ni->ni_rxfrag[i] = NULL; 894 } 895 /* 896 * Must be careful here to remove any key map entry w/o a LOR. 897 */ 898 ieee80211_node_delucastkey(ni); 899#undef N 900} 901 902static void 903node_free(struct ieee80211_node *ni) 904{ 905 struct ieee80211com *ic = ni->ni_ic; 906 907 ic->ic_node_cleanup(ni); 908 if (ni->ni_wpa_ie != NULL) 909 FREE(ni->ni_wpa_ie, M_DEVBUF); 910 if (ni->ni_wme_ie != NULL) 911 FREE(ni->ni_wme_ie, M_DEVBUF); 912 IEEE80211_NODE_SAVEQ_DESTROY(ni); 913 FREE(ni, M_80211_NODE); 914} 915 916static u_int8_t 917node_getrssi(const struct ieee80211_node *ni) 918{ 919 return ni->ni_rssi; 920} 921 922static void 923ieee80211_setup_node(struct ieee80211_node_table *nt, 924 struct ieee80211_node *ni, const u_int8_t *macaddr) 925{ 926 struct ieee80211com *ic = nt->nt_ic; 927 int hash; 928 929 IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 930 "%s %p<%s> in %s table\n", __func__, ni, 931 ether_sprintf(macaddr), nt->nt_name); 932 933 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 934 hash = IEEE80211_NODE_HASH(macaddr); 935 ieee80211_node_initref(ni); /* mark referenced */ 936 ni->ni_chan = IEEE80211_CHAN_ANYC; 937 ni->ni_authmode = IEEE80211_AUTH_OPEN; 938 ni->ni_txpower = ic->ic_txpowlimit; /* max power */ 939 ieee80211_crypto_resetkey(ic, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE); 940 ni->ni_inact_reload = nt->nt_inact_init; 941 ni->ni_inact = ni->ni_inact_reload; 942 IEEE80211_NODE_SAVEQ_INIT(ni, "unknown"); 943 944 IEEE80211_NODE_LOCK(nt); 945 TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list); 946 LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash); 947 ni->ni_table = nt; 948 ni->ni_ic = ic; 949 IEEE80211_NODE_UNLOCK(nt); 950} 951 952struct ieee80211_node * 953ieee80211_alloc_node(struct ieee80211_node_table *nt, const u_int8_t *macaddr) 954{ 955 struct ieee80211com *ic = nt->nt_ic; 956 struct ieee80211_node *ni; 957 958 ni = ic->ic_node_alloc(nt); 959 if (ni != NULL) 960 ieee80211_setup_node(nt, ni, macaddr); 961 else 962 ic->ic_stats.is_rx_nodealloc++; 963 return ni; 964} 965 966/* 967 * Craft a temporary node suitable for sending a management frame 968 * to the specified station. We craft only as much state as we 969 * need to do the work since the node will be immediately reclaimed 970 * once the send completes. 971 */ 972struct ieee80211_node * 973ieee80211_tmp_node(struct ieee80211com *ic, const u_int8_t *macaddr) 974{ 975 struct ieee80211_node *ni; 976 977 ni = ic->ic_node_alloc(&ic->ic_sta); 978 if (ni != NULL) { 979 IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 980 "%s %p<%s>\n", __func__, ni, ether_sprintf(macaddr)); 981 982 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 983 IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_bss->ni_bssid); 984 ieee80211_node_initref(ni); /* mark referenced */ 985 ni->ni_txpower = ic->ic_bss->ni_txpower; 986 /* NB: required by ieee80211_fix_rate */ 987 ieee80211_set_chan(ic, ni, ic->ic_bss->ni_chan); 988 ieee80211_crypto_resetkey(ic, &ni->ni_ucastkey, 989 IEEE80211_KEYIX_NONE); 990 /* XXX optimize away */ 991 IEEE80211_NODE_SAVEQ_INIT(ni, "unknown"); 992 993 ni->ni_table = NULL; /* NB: pedantic */ 994 ni->ni_ic = ic; 995 } else { 996 /* XXX msg */ 997 ic->ic_stats.is_rx_nodealloc++; 998 } 999 return ni; 1000} 1001 1002struct ieee80211_node * 1003ieee80211_dup_bss(struct ieee80211_node_table *nt, const u_int8_t *macaddr) 1004{ 1005 struct ieee80211com *ic = nt->nt_ic; 1006 struct ieee80211_node *ni; 1007 1008 ni = ic->ic_node_alloc(nt); 1009 if (ni != NULL) { 1010 ieee80211_setup_node(nt, ni, macaddr); 1011 /* 1012 * Inherit from ic_bss. 1013 */ 1014 ni->ni_authmode = ic->ic_bss->ni_authmode; 1015 ni->ni_txpower = ic->ic_bss->ni_txpower; 1016 ni->ni_vlan = ic->ic_bss->ni_vlan; /* XXX?? */ 1017 IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_bss->ni_bssid); 1018 ieee80211_set_chan(ic, ni, ic->ic_bss->ni_chan); 1019 ni->ni_rsn = ic->ic_bss->ni_rsn; 1020 } else 1021 ic->ic_stats.is_rx_nodealloc++; 1022 return ni; 1023} 1024 1025static struct ieee80211_node * 1026#ifdef IEEE80211_DEBUG_REFCNT 1027_ieee80211_find_node_debug(struct ieee80211_node_table *nt, 1028 const u_int8_t *macaddr, const char *func, int line) 1029#else 1030_ieee80211_find_node(struct ieee80211_node_table *nt, 1031 const u_int8_t *macaddr) 1032#endif 1033{ 1034 struct ieee80211_node *ni; 1035 int hash; 1036 1037 IEEE80211_NODE_LOCK_ASSERT(nt); 1038 1039 hash = IEEE80211_NODE_HASH(macaddr); 1040 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1041 if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1042 ieee80211_ref_node(ni); /* mark referenced */ 1043#ifdef IEEE80211_DEBUG_REFCNT 1044 IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE, 1045 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1046 func, line, 1047 ni, ether_sprintf(ni->ni_macaddr), 1048 ieee80211_node_refcnt(ni)); 1049#endif 1050 return ni; 1051 } 1052 } 1053 return NULL; 1054} 1055#ifdef IEEE80211_DEBUG_REFCNT 1056#define _ieee80211_find_node(nt, mac) \ 1057 _ieee80211_find_node_debug(nt, mac, func, line) 1058#endif 1059 1060struct ieee80211_node * 1061#ifdef IEEE80211_DEBUG_REFCNT 1062ieee80211_find_node_debug(struct ieee80211_node_table *nt, 1063 const u_int8_t *macaddr, const char *func, int line) 1064#else 1065ieee80211_find_node(struct ieee80211_node_table *nt, const u_int8_t *macaddr) 1066#endif 1067{ 1068 struct ieee80211_node *ni; 1069 1070 IEEE80211_NODE_LOCK(nt); 1071 ni = _ieee80211_find_node(nt, macaddr); 1072 IEEE80211_NODE_UNLOCK(nt); 1073 return ni; 1074} 1075 1076/* 1077 * Fake up a node; this handles node discovery in adhoc mode. 1078 * Note that for the driver's benefit we we treat this like 1079 * an association so the driver has an opportunity to setup 1080 * it's private state. 1081 */ 1082struct ieee80211_node * 1083ieee80211_fakeup_adhoc_node(struct ieee80211_node_table *nt, 1084 const u_int8_t macaddr[IEEE80211_ADDR_LEN]) 1085{ 1086 struct ieee80211com *ic = nt->nt_ic; 1087 struct ieee80211_node *ni; 1088 1089 IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE, 1090 "%s: mac<%s>\n", __func__, ether_sprintf(macaddr)); 1091 ni = ieee80211_dup_bss(nt, macaddr); 1092 if (ni != NULL) { 1093 /* XXX no rate negotiation; just dup */ 1094 ni->ni_rates = ic->ic_bss->ni_rates; 1095 if (ic->ic_newassoc != NULL) 1096 ic->ic_newassoc(ni, 1); 1097 /* XXX not right for 802.1x/WPA */ 1098 ieee80211_node_authorize(ni); 1099 } 1100 return ni; 1101} 1102 1103#ifdef IEEE80211_DEBUG 1104static void 1105dump_probe_beacon(u_int8_t subtype, int isnew, 1106 const u_int8_t mac[IEEE80211_ADDR_LEN], 1107 const struct ieee80211_scanparams *sp) 1108{ 1109 1110 printf("[%s] %s%s on chan %u (bss chan %u) ", 1111 ether_sprintf(mac), isnew ? "new " : "", 1112 ieee80211_mgt_subtype_name[subtype >> IEEE80211_FC0_SUBTYPE_SHIFT], 1113 sp->chan, sp->bchan); 1114 ieee80211_print_essid(sp->ssid + 2, sp->ssid[1]); 1115 printf("\n"); 1116 1117 if (isnew) { 1118 printf("[%s] caps 0x%x bintval %u erp 0x%x", 1119 ether_sprintf(mac), sp->capinfo, sp->bintval, sp->erp); 1120 if (sp->country != NULL) { 1121#ifdef __FreeBSD__ 1122 printf(" country info %*D", 1123 sp->country[1], sp->country+2, " "); 1124#else 1125 int i; 1126 printf(" country info"); 1127 for (i = 0; i < sp->country[1]; i++) 1128 printf(" %02x", sp->country[i+2]); 1129#endif 1130 } 1131 printf("\n"); 1132 } 1133} 1134#endif /* IEEE80211_DEBUG */ 1135 1136static void 1137saveie(u_int8_t **iep, const u_int8_t *ie) 1138{ 1139 1140 if (ie == NULL) 1141 *iep = NULL; 1142 else 1143 ieee80211_saveie(iep, ie); 1144} 1145 1146/* 1147 * Process a beacon or probe response frame. 1148 */ 1149void 1150ieee80211_add_scan(struct ieee80211com *ic, 1151 const struct ieee80211_scanparams *sp, 1152 const struct ieee80211_frame *wh, 1153 int subtype, int rssi, int rstamp) 1154{ 1155#define ISPROBE(_st) ((_st) == IEEE80211_FC0_SUBTYPE_PROBE_RESP) 1156 struct ieee80211_node_table *nt = &ic->ic_scan; 1157 struct ieee80211_node *ni; 1158 int newnode = 0; 1159 1160 ni = ieee80211_find_node(nt, wh->i_addr2); 1161 if (ni == NULL) { 1162 /* 1163 * Create a new entry. 1164 */ 1165 ni = ic->ic_node_alloc(nt); 1166 if (ni == NULL) { 1167 ic->ic_stats.is_rx_nodealloc++; 1168 return; 1169 } 1170 ieee80211_setup_node(nt, ni, wh->i_addr2); 1171 /* 1172 * XXX inherit from ic_bss. 1173 */ 1174 ni->ni_authmode = ic->ic_bss->ni_authmode; 1175 ni->ni_txpower = ic->ic_bss->ni_txpower; 1176 ni->ni_vlan = ic->ic_bss->ni_vlan; /* XXX?? */ 1177 ieee80211_set_chan(ic, ni, ic->ic_curchan); 1178 ni->ni_rsn = ic->ic_bss->ni_rsn; 1179 newnode = 1; 1180 } 1181#ifdef IEEE80211_DEBUG 1182 if (ieee80211_msg_scan(ic) && (ic->ic_flags & IEEE80211_F_SCAN)) 1183 dump_probe_beacon(subtype, newnode, wh->i_addr2, sp); 1184#endif 1185 /* XXX ap beaconing multiple ssid w/ same bssid */ 1186 if (sp->ssid[1] != 0 && 1187 (ISPROBE(subtype) || ni->ni_esslen == 0)) { 1188 ni->ni_esslen = sp->ssid[1]; 1189 memset(ni->ni_essid, 0, sizeof(ni->ni_essid)); 1190 memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]); 1191 } 1192 ni->ni_scangen = ic->ic_scan.nt_scangen; 1193 IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3); 1194 ni->ni_rssi = rssi; 1195 ni->ni_rstamp = rstamp; 1196 memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp)); 1197 ni->ni_intval = sp->bintval; 1198 ni->ni_capinfo = sp->capinfo; 1199 ni->ni_chan = &ic->ic_channels[sp->chan]; 1200 ni->ni_fhdwell = sp->fhdwell; 1201 ni->ni_fhindex = sp->fhindex; 1202 ni->ni_erp = sp->erp; 1203 if (sp->tim != NULL) { 1204 struct ieee80211_tim_ie *ie = 1205 (struct ieee80211_tim_ie *) sp->tim; 1206 1207 ni->ni_dtim_count = ie->tim_count; 1208 ni->ni_dtim_period = ie->tim_period; 1209 } 1210 /* 1211 * Record the byte offset from the mac header to 1212 * the start of the TIM information element for 1213 * use by hardware and/or to speedup software 1214 * processing of beacon frames. 1215 */ 1216 ni->ni_timoff = sp->timoff; 1217 /* 1218 * Record optional information elements that might be 1219 * used by applications or drivers. 1220 */ 1221 saveie(&ni->ni_wme_ie, sp->wme); 1222 saveie(&ni->ni_wpa_ie, sp->wpa); 1223 1224 /* NB: must be after ni_chan is setup */ 1225 ieee80211_setup_rates(ni, sp->rates, sp->xrates, IEEE80211_F_DOSORT); 1226 1227 if (!newnode) 1228 ieee80211_free_node(ni); 1229#undef ISPROBE 1230} 1231 1232void 1233ieee80211_init_neighbor(struct ieee80211_node *ni, 1234 const struct ieee80211_frame *wh, 1235 const struct ieee80211_scanparams *sp) 1236{ 1237 1238 IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE, 1239 "%s: %p<%s>\n", __func__, ni, ether_sprintf(ni->ni_macaddr)); 1240 ni->ni_esslen = sp->ssid[1]; 1241 memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]); 1242 IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3); 1243 memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp)); 1244 ni->ni_intval = sp->bintval; 1245 ni->ni_capinfo = sp->capinfo; 1246 ni->ni_chan = ni->ni_ic->ic_curchan; 1247 ni->ni_fhdwell = sp->fhdwell; 1248 ni->ni_fhindex = sp->fhindex; 1249 ni->ni_erp = sp->erp; 1250 ni->ni_timoff = sp->timoff; 1251 if (sp->wme != NULL) 1252 ieee80211_saveie(&ni->ni_wme_ie, sp->wme); 1253 if (sp->wpa != NULL) 1254 ieee80211_saveie(&ni->ni_wpa_ie, sp->wpa); 1255 1256 /* NB: must be after ni_chan is setup */ 1257 ieee80211_setup_rates(ni, sp->rates, sp->xrates, IEEE80211_F_DOSORT); 1258} 1259 1260/* 1261 * Do node discovery in adhoc mode on receipt of a beacon 1262 * or probe response frame. Note that for the driver's 1263 * benefit we we treat this like an association so the 1264 * driver has an opportunity to setup it's private state. 1265 */ 1266struct ieee80211_node * 1267ieee80211_add_neighbor(struct ieee80211com *ic, 1268 const struct ieee80211_frame *wh, 1269 const struct ieee80211_scanparams *sp) 1270{ 1271 struct ieee80211_node *ni; 1272 1273 IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1274 "%s: mac<%s>\n", __func__, ether_sprintf(wh->i_addr2)); 1275 ni = ieee80211_dup_bss(&ic->ic_sta, wh->i_addr2);/* XXX alloc_node? */ 1276 if (ni != NULL) { 1277 ieee80211_init_neighbor(ni, wh, sp); 1278 if (ic->ic_newassoc != NULL) 1279 ic->ic_newassoc(ni, 1); 1280 /* XXX not right for 802.1x/WPA */ 1281 ieee80211_node_authorize(ni); 1282 } 1283 return ni; 1284} 1285 1286#define IS_CTL(wh) \ 1287 ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) == IEEE80211_FC0_TYPE_CTL) 1288#define IS_PSPOLL(wh) \ 1289 ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == IEEE80211_FC0_SUBTYPE_PS_POLL) 1290/* 1291 * Locate the node for sender, track state, and then pass the 1292 * (referenced) node up to the 802.11 layer for its use. We 1293 * are required to pass some node so we fall back to ic_bss 1294 * when this frame is from an unknown sender. The 802.11 layer 1295 * knows this means the sender wasn't in the node table and 1296 * acts accordingly. 1297 */ 1298struct ieee80211_node * 1299#ifdef IEEE80211_DEBUG_REFCNT 1300ieee80211_find_rxnode_debug(struct ieee80211com *ic, 1301 const struct ieee80211_frame_min *wh, const char *func, int line) 1302#else 1303ieee80211_find_rxnode(struct ieee80211com *ic, 1304 const struct ieee80211_frame_min *wh) 1305#endif 1306{ 1307 struct ieee80211_node_table *nt; 1308 struct ieee80211_node *ni; 1309 1310 /* XXX may want scanned nodes in the neighbor table for adhoc */ 1311 if (ic->ic_opmode == IEEE80211_M_STA || 1312 ic->ic_opmode == IEEE80211_M_MONITOR || 1313 (ic->ic_flags & IEEE80211_F_SCAN)) 1314 nt = &ic->ic_scan; 1315 else 1316 nt = &ic->ic_sta; 1317 /* XXX check ic_bss first in station mode */ 1318 /* XXX 4-address frames? */ 1319 IEEE80211_NODE_LOCK(nt); 1320 if (IS_CTL(wh) && !IS_PSPOLL(wh) /*&& !IS_RTS(ah)*/) 1321 ni = _ieee80211_find_node(nt, wh->i_addr1); 1322 else 1323 ni = _ieee80211_find_node(nt, wh->i_addr2); 1324 if (ni == NULL) 1325 ni = ieee80211_ref_node(ic->ic_bss); 1326 IEEE80211_NODE_UNLOCK(nt); 1327 1328 return ni; 1329} 1330 1331/* 1332 * Like ieee80211_find_rxnode but use the supplied h/w 1333 * key index as a hint to locate the node in the key 1334 * mapping table. If an entry is present at the key 1335 * index we return it; otherwise do a normal lookup and 1336 * update the mapping table if the station has a unicast 1337 * key assigned to it. 1338 */ 1339struct ieee80211_node * 1340#ifdef IEEE80211_DEBUG_REFCNT 1341ieee80211_find_rxnode_withkey_debug(struct ieee80211com *ic, 1342 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix, 1343 const char *func, int line) 1344#else 1345ieee80211_find_rxnode_withkey(struct ieee80211com *ic, 1346 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix) 1347#endif 1348{ 1349 struct ieee80211_node_table *nt; 1350 struct ieee80211_node *ni; 1351 1352 if (ic->ic_opmode == IEEE80211_M_STA || 1353 ic->ic_opmode == IEEE80211_M_MONITOR || 1354 (ic->ic_flags & IEEE80211_F_SCAN)) 1355 nt = &ic->ic_scan; 1356 else 1357 nt = &ic->ic_sta; 1358 IEEE80211_NODE_LOCK(nt); 1359 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) 1360 ni = nt->nt_keyixmap[keyix]; 1361 else 1362 ni = NULL; 1363 if (ni == NULL) { 1364 if (IS_CTL(wh) && !IS_PSPOLL(wh) /*&& !IS_RTS(ah)*/) 1365 ni = _ieee80211_find_node(nt, wh->i_addr1); 1366 else 1367 ni = _ieee80211_find_node(nt, wh->i_addr2); 1368 if (ni == NULL) 1369 ni = ieee80211_ref_node(ic->ic_bss); 1370 if (nt->nt_keyixmap != NULL) { 1371 /* 1372 * If the station has a unicast key cache slot 1373 * assigned update the key->node mapping table. 1374 */ 1375 keyix = ni->ni_ucastkey.wk_rxkeyix; 1376 /* XXX can keyixmap[keyix] != NULL? */ 1377 if (keyix < nt->nt_keyixmax && 1378 nt->nt_keyixmap[keyix] == NULL) { 1379 IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE, 1380 "%s: add key map entry %p<%s> refcnt %d\n", 1381 __func__, ni, ether_sprintf(ni->ni_macaddr), 1382 ieee80211_node_refcnt(ni)+1); 1383 nt->nt_keyixmap[keyix] = ieee80211_ref_node(ni); 1384 } 1385 } 1386 } else { 1387 ieee80211_ref_node(ni); 1388 } 1389 IEEE80211_NODE_UNLOCK(nt); 1390 1391 return ni; 1392} 1393#undef IS_PSPOLL 1394#undef IS_CTL 1395 1396/* 1397 * Return a reference to the appropriate node for sending 1398 * a data frame. This handles node discovery in adhoc networks. 1399 */ 1400struct ieee80211_node * 1401#ifdef IEEE80211_DEBUG_REFCNT 1402ieee80211_find_txnode_debug(struct ieee80211com *ic, const u_int8_t *macaddr, 1403 const char *func, int line) 1404#else 1405ieee80211_find_txnode(struct ieee80211com *ic, const u_int8_t *macaddr) 1406#endif 1407{ 1408 struct ieee80211_node_table *nt = &ic->ic_sta; 1409 struct ieee80211_node *ni; 1410 1411 /* 1412 * The destination address should be in the node table 1413 * unless this is a multicast/broadcast frame. We can 1414 * also optimize station mode operation, all frames go 1415 * to the bss node. 1416 */ 1417 /* XXX can't hold lock across dup_bss 'cuz of recursive locking */ 1418 IEEE80211_NODE_LOCK(nt); 1419 if (ic->ic_opmode == IEEE80211_M_STA || IEEE80211_IS_MULTICAST(macaddr)) 1420 ni = ieee80211_ref_node(ic->ic_bss); 1421 else 1422 ni = _ieee80211_find_node(nt, macaddr); 1423 IEEE80211_NODE_UNLOCK(nt); 1424 1425 if (ni == NULL) { 1426 if (ic->ic_opmode == IEEE80211_M_IBSS || 1427 ic->ic_opmode == IEEE80211_M_AHDEMO) { 1428 /* 1429 * In adhoc mode cons up a node for the destination. 1430 * Note that we need an additional reference for the 1431 * caller to be consistent with _ieee80211_find_node. 1432 */ 1433 ni = ieee80211_fakeup_adhoc_node(nt, macaddr); 1434 if (ni != NULL) 1435 (void) ieee80211_ref_node(ni); 1436 } else { 1437 IEEE80211_DPRINTF(ic, IEEE80211_MSG_OUTPUT, 1438 "[%s] no node, discard frame (%s)\n", 1439 ether_sprintf(macaddr), __func__); 1440 ic->ic_stats.is_tx_nonode++; 1441 } 1442 } 1443 return ni; 1444} 1445 1446/* 1447 * Like find but search based on the channel too. 1448 */ 1449struct ieee80211_node * 1450#ifdef IEEE80211_DEBUG_REFCNT 1451ieee80211_find_node_with_channel_debug(struct ieee80211_node_table *nt, 1452 const u_int8_t *macaddr, struct ieee80211_channel *chan, 1453 const char *func, int line) 1454#else 1455ieee80211_find_node_with_channel(struct ieee80211_node_table *nt, 1456 const u_int8_t *macaddr, struct ieee80211_channel *chan) 1457#endif 1458{ 1459 struct ieee80211_node *ni; 1460 int hash; 1461 1462 hash = IEEE80211_NODE_HASH(macaddr); 1463 IEEE80211_NODE_LOCK(nt); 1464 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1465 if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr) && 1466 ni->ni_chan == chan) { 1467 ieee80211_ref_node(ni); /* mark referenced */ 1468 IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE, 1469#ifdef IEEE80211_DEBUG_REFCNT 1470 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1471 func, line, 1472#else 1473 "%s %p<%s> refcnt %d\n", __func__, 1474#endif 1475 ni, ether_sprintf(ni->ni_macaddr), 1476 ieee80211_node_refcnt(ni)); 1477 break; 1478 } 1479 } 1480 IEEE80211_NODE_UNLOCK(nt); 1481 return ni; 1482} 1483 1484/* 1485 * Like find but search based on the ssid too. 1486 */ 1487struct ieee80211_node * 1488#ifdef IEEE80211_DEBUG_REFCNT 1489ieee80211_find_node_with_ssid_debug(struct ieee80211_node_table *nt, 1490 const u_int8_t *macaddr, u_int ssidlen, const u_int8_t *ssid, 1491 const char *func, int line) 1492#else 1493ieee80211_find_node_with_ssid(struct ieee80211_node_table *nt, 1494 const u_int8_t *macaddr, u_int ssidlen, const u_int8_t *ssid) 1495#endif 1496{ 1497#define MATCH_SSID(ni, ssid, ssidlen) \ 1498 (ni->ni_esslen == ssidlen && memcmp(ni->ni_essid, ssid, ssidlen) == 0) 1499 static const u_int8_t zeromac[IEEE80211_ADDR_LEN]; 1500 struct ieee80211com *ic = nt->nt_ic; 1501 struct ieee80211_node *ni; 1502 int hash; 1503 1504 IEEE80211_NODE_LOCK(nt); 1505 /* 1506 * A mac address that is all zero means match only the ssid; 1507 * otherwise we must match both. 1508 */ 1509 if (IEEE80211_ADDR_EQ(macaddr, zeromac)) { 1510 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 1511 if (MATCH_SSID(ni, ssid, ssidlen)) 1512 break; 1513 } 1514 } else { 1515 hash = IEEE80211_NODE_HASH(macaddr); 1516 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1517 if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr) && 1518 MATCH_SSID(ni, ssid, ssidlen)) 1519 break; 1520 } 1521 } 1522 if (ni != NULL) { 1523 ieee80211_ref_node(ni); /* mark referenced */ 1524 IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1525#ifdef IEEE80211_DEBUG_REFCNT 1526 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1527 func, line, 1528#else 1529 "%s %p<%s> refcnt %d\n", __func__, 1530#endif 1531 ni, ether_sprintf(ni->ni_macaddr), 1532 ieee80211_node_refcnt(ni)); 1533 } 1534 IEEE80211_NODE_UNLOCK(nt); 1535 return ni; 1536#undef MATCH_SSID 1537} 1538 1539static void 1540_ieee80211_free_node(struct ieee80211_node *ni) 1541{ 1542 struct ieee80211com *ic = ni->ni_ic; 1543 struct ieee80211_node_table *nt = ni->ni_table; 1544 1545 IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1546 "%s %p<%s> in %s table\n", __func__, ni, 1547 ether_sprintf(ni->ni_macaddr), 1548 nt != NULL ? nt->nt_name : "<gone>"); 1549 1550 IEEE80211_AID_CLR(ni->ni_associd, ic->ic_aid_bitmap); 1551 if (nt != NULL) { 1552 TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1553 LIST_REMOVE(ni, ni_hash); 1554 } 1555 ic->ic_node_free(ni); 1556} 1557 1558void 1559#ifdef IEEE80211_DEBUG_REFCNT 1560ieee80211_free_node_debug(struct ieee80211_node *ni, const char *func, int line) 1561#else 1562ieee80211_free_node(struct ieee80211_node *ni) 1563#endif 1564{ 1565 struct ieee80211_node_table *nt = ni->ni_table; 1566 1567#ifdef IEEE80211_DEBUG_REFCNT 1568 IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE, 1569 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni, 1570 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1); 1571#endif 1572 if (nt != NULL) { 1573 IEEE80211_NODE_LOCK(nt); 1574 if (ieee80211_node_dectestref(ni)) { 1575 /* 1576 * Last reference, reclaim state. 1577 */ 1578 _ieee80211_free_node(ni); 1579 } else if (ieee80211_node_refcnt(ni) == 1 && 1580 nt->nt_keyixmap != NULL) { 1581 ieee80211_keyix keyix; 1582 /* 1583 * Check for a last reference in the key mapping table. 1584 */ 1585 keyix = ni->ni_ucastkey.wk_rxkeyix; 1586 if (keyix < nt->nt_keyixmax && 1587 nt->nt_keyixmap[keyix] == ni) { 1588 IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE, 1589 "%s: %p<%s> clear key map entry", __func__, 1590 ni, ether_sprintf(ni->ni_macaddr)); 1591 nt->nt_keyixmap[keyix] = NULL; 1592 ieee80211_node_decref(ni); /* XXX needed? */ 1593 _ieee80211_free_node(ni); 1594 } 1595 } 1596 IEEE80211_NODE_UNLOCK(nt); 1597 } else { 1598 if (ieee80211_node_dectestref(ni)) 1599 _ieee80211_free_node(ni); 1600 } 1601} 1602 1603/* 1604 * Reclaim a unicast key and clear any key cache state. 1605 */ 1606int 1607ieee80211_node_delucastkey(struct ieee80211_node *ni) 1608{ 1609 struct ieee80211com *ic = ni->ni_ic; 1610 struct ieee80211_node_table *nt = &ic->ic_sta; 1611 struct ieee80211_node *nikey; 1612 ieee80211_keyix keyix; 1613 int isowned, status; 1614 1615 /* 1616 * NB: We must beware of LOR here; deleting the key 1617 * can cause the crypto layer to block traffic updates 1618 * which can generate a LOR against the node table lock; 1619 * grab it here and stash the key index for our use below. 1620 * 1621 * Must also beware of recursion on the node table lock. 1622 * When called from node_cleanup we may already have 1623 * the node table lock held. Unfortunately there's no 1624 * way to separate out this path so we must do this 1625 * conditionally. 1626 */ 1627 isowned = IEEE80211_NODE_IS_LOCKED(nt); 1628 if (!isowned) 1629 IEEE80211_NODE_LOCK(nt); 1630 keyix = ni->ni_ucastkey.wk_rxkeyix; 1631 status = ieee80211_crypto_delkey(ic, &ni->ni_ucastkey); 1632 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) { 1633 nikey = nt->nt_keyixmap[keyix]; 1634 nt->nt_keyixmap[keyix] = NULL;; 1635 } else 1636 nikey = NULL; 1637 if (!isowned) 1638 IEEE80211_NODE_UNLOCK(&ic->ic_sta); 1639 1640 if (nikey != NULL) { 1641 KASSERT(nikey == ni, 1642 ("key map out of sync, ni %p nikey %p", ni, nikey)); 1643 IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE, 1644 "%s: delete key map entry %p<%s> refcnt %d\n", 1645 __func__, ni, ether_sprintf(ni->ni_macaddr), 1646 ieee80211_node_refcnt(ni)-1); 1647 ieee80211_free_node(ni); 1648 } 1649 return status; 1650} 1651 1652/* 1653 * Reclaim a node. If this is the last reference count then 1654 * do the normal free work. Otherwise remove it from the node 1655 * table and mark it gone by clearing the back-reference. 1656 */ 1657static void 1658node_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 1659{ 1660 ieee80211_keyix keyix; 1661 1662 IEEE80211_NODE_LOCK_ASSERT(nt); 1663 1664 IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE, 1665 "%s: remove %p<%s> from %s table, refcnt %d\n", 1666 __func__, ni, ether_sprintf(ni->ni_macaddr), 1667 nt->nt_name, ieee80211_node_refcnt(ni)-1); 1668 /* 1669 * Clear any entry in the unicast key mapping table. 1670 * We need to do it here so rx lookups don't find it 1671 * in the mapping table even if it's not in the hash 1672 * table. We cannot depend on the mapping table entry 1673 * being cleared because the node may not be free'd. 1674 */ 1675 keyix = ni->ni_ucastkey.wk_rxkeyix; 1676 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax && 1677 nt->nt_keyixmap[keyix] == ni) { 1678 IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE, 1679 "%s: %p<%s> clear key map entry\n", 1680 __func__, ni, ether_sprintf(ni->ni_macaddr)); 1681 nt->nt_keyixmap[keyix] = NULL; 1682 ieee80211_node_decref(ni); /* NB: don't need free */ 1683 } 1684 if (!ieee80211_node_dectestref(ni)) { 1685 /* 1686 * Other references are present, just remove the 1687 * node from the table so it cannot be found. When 1688 * the references are dropped storage will be 1689 * reclaimed. 1690 */ 1691 TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1692 LIST_REMOVE(ni, ni_hash); 1693 ni->ni_table = NULL; /* clear reference */ 1694 } else 1695 _ieee80211_free_node(ni); 1696} 1697 1698static void 1699ieee80211_free_allnodes_locked(struct ieee80211_node_table *nt) 1700{ 1701 struct ieee80211com *ic = nt->nt_ic; 1702 struct ieee80211_node *ni; 1703 1704 IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1705 "%s: free all nodes in %s table\n", __func__, nt->nt_name); 1706 1707 while ((ni = TAILQ_FIRST(&nt->nt_node)) != NULL) { 1708 if (ni->ni_associd != 0) { 1709 if (ic->ic_auth->ia_node_leave != NULL) 1710 ic->ic_auth->ia_node_leave(ic, ni); 1711 IEEE80211_AID_CLR(ni->ni_associd, ic->ic_aid_bitmap); 1712 } 1713 node_reclaim(nt, ni); 1714 } 1715 ieee80211_reset_erp(ic); 1716} 1717 1718static void 1719ieee80211_free_allnodes(struct ieee80211_node_table *nt) 1720{ 1721 1722 IEEE80211_NODE_LOCK(nt); 1723 ieee80211_free_allnodes_locked(nt); 1724 IEEE80211_NODE_UNLOCK(nt); 1725} 1726 1727/* 1728 * Timeout entries in the scan cache. 1729 */ 1730static void 1731ieee80211_timeout_scan_candidates(struct ieee80211_node_table *nt) 1732{ 1733 struct ieee80211com *ic = nt->nt_ic; 1734 struct ieee80211_node *ni, *tni; 1735 1736 IEEE80211_NODE_LOCK(nt); 1737 ni = ic->ic_bss; 1738 /* XXX belongs elsewhere */ 1739 if (ni->ni_rxfrag[0] != NULL && ticks > ni->ni_rxfragstamp + hz) { 1740 m_freem(ni->ni_rxfrag[0]); 1741 ni->ni_rxfrag[0] = NULL; 1742 } 1743 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, tni) { 1744 if (ni->ni_inact && --ni->ni_inact == 0) { 1745 IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1746 "[%s] scan candidate purged from cache " 1747 "(refcnt %u)\n", ether_sprintf(ni->ni_macaddr), 1748 ieee80211_node_refcnt(ni)); 1749 node_reclaim(nt, ni); 1750 } 1751 } 1752 IEEE80211_NODE_UNLOCK(nt); 1753 1754 nt->nt_inact_timer = IEEE80211_INACT_WAIT; 1755} 1756 1757/* 1758 * Timeout inactive stations and do related housekeeping. 1759 * Note that we cannot hold the node lock while sending a 1760 * frame as this would lead to a LOR. Instead we use a 1761 * generation number to mark nodes that we've scanned and 1762 * drop the lock and restart a scan if we have to time out 1763 * a node. Since we are single-threaded by virtue of 1764 * controlling the inactivity timer we can be sure this will 1765 * process each node only once. 1766 */ 1767static void 1768ieee80211_timeout_stations(struct ieee80211_node_table *nt) 1769{ 1770 struct ieee80211com *ic = nt->nt_ic; 1771 struct ieee80211_node *ni; 1772 u_int gen; 1773 int isadhoc; 1774 1775 isadhoc = (ic->ic_opmode == IEEE80211_M_IBSS || 1776 ic->ic_opmode == IEEE80211_M_AHDEMO); 1777 IEEE80211_SCAN_LOCK(nt); 1778 gen = nt->nt_scangen++; 1779 IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1780 "%s: %s scangen %u\n", __func__, nt->nt_name, gen); 1781restart: 1782 IEEE80211_NODE_LOCK(nt); 1783 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 1784 if (ni->ni_scangen == gen) /* previously handled */ 1785 continue; 1786 ni->ni_scangen = gen; 1787 /* 1788 * Ignore entries for which have yet to receive an 1789 * authentication frame. These are transient and 1790 * will be reclaimed when the last reference to them 1791 * goes away (when frame xmits complete). 1792 */ 1793 if (ic->ic_opmode == IEEE80211_M_HOSTAP && 1794 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 1795 continue; 1796 /* 1797 * Free fragment if not needed anymore 1798 * (last fragment older than 1s). 1799 * XXX doesn't belong here 1800 */ 1801 if (ni->ni_rxfrag[0] != NULL && 1802 ticks > ni->ni_rxfragstamp + hz) { 1803 m_freem(ni->ni_rxfrag[0]); 1804 ni->ni_rxfrag[0] = NULL; 1805 } 1806 /* 1807 * Special case ourself; we may be idle for extended periods 1808 * of time and regardless reclaiming our state is wrong. 1809 */ 1810 if (ni == ic->ic_bss) 1811 continue; 1812 ni->ni_inact--; 1813 if (ni->ni_associd != 0 || isadhoc) { 1814 /* 1815 * Age frames on the power save queue. The 1816 * aging interval is 4 times the listen 1817 * interval specified by the station. This 1818 * number is factored into the age calculations 1819 * when the frame is placed on the queue. We 1820 * store ages as time differences we can check 1821 * and/or adjust only the head of the list. 1822 */ 1823 if (IEEE80211_NODE_SAVEQ_QLEN(ni) != 0) { 1824 struct mbuf *m; 1825 int discard = 0; 1826 1827 IEEE80211_NODE_SAVEQ_LOCK(ni); 1828 while (IF_POLL(&ni->ni_savedq, m) != NULL && 1829 M_AGE_GET(m) < IEEE80211_INACT_WAIT) { 1830IEEE80211_DPRINTF(ic, IEEE80211_MSG_POWER, "[%s] discard frame, age %u\n", ether_sprintf(ni->ni_macaddr), M_AGE_GET(m));/*XXX*/ 1831 _IEEE80211_NODE_SAVEQ_DEQUEUE_HEAD(ni, m); 1832 m_freem(m); 1833 discard++; 1834 } 1835 if (m != NULL) 1836 M_AGE_SUB(m, IEEE80211_INACT_WAIT); 1837 IEEE80211_NODE_SAVEQ_UNLOCK(ni); 1838 1839 if (discard != 0) { 1840 IEEE80211_DPRINTF(ic, 1841 IEEE80211_MSG_POWER, 1842 "[%s] discard %u frames for age\n", 1843 ether_sprintf(ni->ni_macaddr), 1844 discard); 1845 IEEE80211_NODE_STAT_ADD(ni, 1846 ps_discard, discard); 1847 if (IEEE80211_NODE_SAVEQ_QLEN(ni) == 0) 1848 ic->ic_set_tim(ni, 0); 1849 } 1850 } 1851 /* 1852 * Probe the station before time it out. We 1853 * send a null data frame which may not be 1854 * universally supported by drivers (need it 1855 * for ps-poll support so it should be...). 1856 */ 1857 if (0 < ni->ni_inact && 1858 ni->ni_inact <= ic->ic_inact_probe) { 1859 IEEE80211_NOTE(ic, 1860 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, 1861 ni, "%s", 1862 "probe station due to inactivity"); 1863 /* 1864 * Grab a reference before unlocking the table 1865 * so the node cannot be reclaimed before we 1866 * send the frame. ieee80211_send_nulldata 1867 * understands we've done this and reclaims the 1868 * ref for us as needed. 1869 */ 1870 ieee80211_ref_node(ni); 1871 IEEE80211_NODE_UNLOCK(nt); 1872 ieee80211_send_nulldata(ni); 1873 /* XXX stat? */ 1874 goto restart; 1875 } 1876 } 1877 if (ni->ni_inact <= 0) { 1878 IEEE80211_NOTE(ic, 1879 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, ni, 1880 "station timed out due to inactivity " 1881 "(refcnt %u)", ieee80211_node_refcnt(ni)); 1882 /* 1883 * Send a deauthenticate frame and drop the station. 1884 * This is somewhat complicated due to reference counts 1885 * and locking. At this point a station will typically 1886 * have a reference count of 1. ieee80211_node_leave 1887 * will do a "free" of the node which will drop the 1888 * reference count. But in the meantime a reference 1889 * wil be held by the deauth frame. The actual reclaim 1890 * of the node will happen either after the tx is 1891 * completed or by ieee80211_node_leave. 1892 * 1893 * Separately we must drop the node lock before sending 1894 * in case the driver takes a lock, as this will result 1895 * in LOR between the node lock and the driver lock. 1896 */ 1897 IEEE80211_NODE_UNLOCK(nt); 1898 if (ni->ni_associd != 0) { 1899 IEEE80211_SEND_MGMT(ic, ni, 1900 IEEE80211_FC0_SUBTYPE_DEAUTH, 1901 IEEE80211_REASON_AUTH_EXPIRE); 1902 } 1903 ieee80211_node_leave(ic, ni); 1904 ic->ic_stats.is_node_timeout++; 1905 goto restart; 1906 } 1907 } 1908 IEEE80211_NODE_UNLOCK(nt); 1909 1910 IEEE80211_SCAN_UNLOCK(nt); 1911 1912 nt->nt_inact_timer = IEEE80211_INACT_WAIT; 1913} 1914 1915void 1916ieee80211_iterate_nodes(struct ieee80211_node_table *nt, ieee80211_iter_func *f, void *arg) 1917{ 1918 struct ieee80211_node *ni; 1919 u_int gen; 1920 1921 IEEE80211_SCAN_LOCK(nt); 1922 gen = nt->nt_scangen++; 1923restart: 1924 IEEE80211_NODE_LOCK(nt); 1925 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 1926 if (ni->ni_scangen != gen) { 1927 ni->ni_scangen = gen; 1928 (void) ieee80211_ref_node(ni); 1929 IEEE80211_NODE_UNLOCK(nt); 1930 (*f)(arg, ni); 1931 ieee80211_free_node(ni); 1932 goto restart; 1933 } 1934 } 1935 IEEE80211_NODE_UNLOCK(nt); 1936 1937 IEEE80211_SCAN_UNLOCK(nt); 1938} 1939 1940void 1941ieee80211_dump_node(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 1942{ 1943 printf("0x%p: mac %s refcnt %d\n", ni, 1944 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)); 1945 printf("\tscangen %u authmode %u flags 0x%x\n", 1946 ni->ni_scangen, ni->ni_authmode, ni->ni_flags); 1947 printf("\tassocid 0x%x txpower %u vlan %u\n", 1948 ni->ni_associd, ni->ni_txpower, ni->ni_vlan); 1949 printf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n", 1950 ni->ni_txseqs[0], 1951 ni->ni_rxseqs[0] >> IEEE80211_SEQ_SEQ_SHIFT, 1952 ni->ni_rxseqs[0] & IEEE80211_SEQ_FRAG_MASK, 1953 ni->ni_rxfragstamp); 1954 printf("\trstamp %u rssi %u intval %u capinfo 0x%x\n", 1955 ni->ni_rstamp, ni->ni_rssi, ni->ni_intval, ni->ni_capinfo); 1956 printf("\tbssid %s essid \"%.*s\" channel %u:0x%x\n", 1957 ether_sprintf(ni->ni_bssid), 1958 ni->ni_esslen, ni->ni_essid, 1959 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags); 1960 printf("\tfails %u inact %u txrate %u\n", 1961 ni->ni_fails, ni->ni_inact, ni->ni_txrate); 1962} 1963 1964void 1965ieee80211_dump_nodes(struct ieee80211_node_table *nt) 1966{ 1967 ieee80211_iterate_nodes(nt, 1968 (ieee80211_iter_func *) ieee80211_dump_node, nt); 1969} 1970 1971/* 1972 * Handle a station joining an 11g network. 1973 */ 1974static void 1975ieee80211_node_join_11g(struct ieee80211com *ic, struct ieee80211_node *ni) 1976{ 1977 1978 /* 1979 * Station isn't capable of short slot time. Bump 1980 * the count of long slot time stations and disable 1981 * use of short slot time. Note that the actual switch 1982 * over to long slot time use may not occur until the 1983 * next beacon transmission (per sec. 7.3.1.4 of 11g). 1984 */ 1985 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 1986 ic->ic_longslotsta++; 1987 IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1988 "[%s] station needs long slot time, count %d\n", 1989 ether_sprintf(ni->ni_macaddr), ic->ic_longslotsta); 1990 /* XXX vap's w/ conflicting needs won't work */ 1991 ieee80211_set_shortslottime(ic, 0); 1992 } 1993 /* 1994 * If the new station is not an ERP station 1995 * then bump the counter and enable protection 1996 * if configured. 1997 */ 1998 if (!ieee80211_iserp_rateset(ic, &ni->ni_rates)) { 1999 ic->ic_nonerpsta++; 2000 IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 2001 "[%s] station is !ERP, %d non-ERP stations associated\n", 2002 ether_sprintf(ni->ni_macaddr), ic->ic_nonerpsta); 2003 /* 2004 * If protection is configured, enable it. 2005 */ 2006 if (ic->ic_protmode != IEEE80211_PROT_NONE) { 2007 IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 2008 "%s: enable use of protection\n", __func__); 2009 ic->ic_flags |= IEEE80211_F_USEPROT; 2010 } 2011 /* 2012 * If station does not support short preamble 2013 * then we must enable use of Barker preamble. 2014 */ 2015 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) { 2016 IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 2017 "[%s] station needs long preamble\n", 2018 ether_sprintf(ni->ni_macaddr)); 2019 ic->ic_flags |= IEEE80211_F_USEBARKER; 2020 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; 2021 } 2022 } else 2023 ni->ni_flags |= IEEE80211_NODE_ERP; 2024} 2025 2026void 2027ieee80211_node_join(struct ieee80211com *ic, struct ieee80211_node *ni, int resp) 2028{ 2029 int newassoc; 2030 2031 if (ni->ni_associd == 0) { 2032 u_int16_t aid; 2033 2034 /* 2035 * It would be good to search the bitmap 2036 * more efficiently, but this will do for now. 2037 */ 2038 for (aid = 1; aid < ic->ic_max_aid; aid++) { 2039 if (!IEEE80211_AID_ISSET(aid, 2040 ic->ic_aid_bitmap)) 2041 break; 2042 } 2043 if (aid >= ic->ic_max_aid) { 2044 IEEE80211_SEND_MGMT(ic, ni, resp, 2045 IEEE80211_REASON_ASSOC_TOOMANY); 2046 ieee80211_node_leave(ic, ni); 2047 return; 2048 } 2049 ni->ni_associd = aid | 0xc000; 2050 IEEE80211_AID_SET(ni->ni_associd, ic->ic_aid_bitmap); 2051 ic->ic_sta_assoc++; 2052 newassoc = 1; 2053 if (ic->ic_curmode == IEEE80211_MODE_11G) 2054 ieee80211_node_join_11g(ic, ni); 2055 } else 2056 newassoc = 0; 2057 2058 IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, 2059 "[%s] station %sassociated at aid %d: %s preamble, %s slot time%s%s\n", 2060 ether_sprintf(ni->ni_macaddr), newassoc ? "" : "re", 2061 IEEE80211_NODE_AID(ni), 2062 ic->ic_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long", 2063 ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long", 2064 ic->ic_flags & IEEE80211_F_USEPROT ? ", protection" : "", 2065 ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "" 2066 ); 2067 2068 /* give driver a chance to setup state like ni_txrate */ 2069 if (ic->ic_newassoc != NULL) 2070 ic->ic_newassoc(ni, newassoc); 2071 ni->ni_inact_reload = ic->ic_inact_auth; 2072 ni->ni_inact = ni->ni_inact_reload; 2073 IEEE80211_SEND_MGMT(ic, ni, resp, IEEE80211_STATUS_SUCCESS); 2074 /* tell the authenticator about new station */ 2075 if (ic->ic_auth->ia_node_join != NULL) 2076 ic->ic_auth->ia_node_join(ic, ni); 2077 ieee80211_notify_node_join(ic, ni, newassoc); 2078} 2079 2080/* 2081 * Handle a station leaving an 11g network. 2082 */ 2083static void 2084ieee80211_node_leave_11g(struct ieee80211com *ic, struct ieee80211_node *ni) 2085{ 2086 2087 KASSERT(ic->ic_curmode == IEEE80211_MODE_11G, 2088 ("not in 11g, bss %u:0x%x, curmode %u", ni->ni_chan->ic_freq, 2089 ni->ni_chan->ic_flags, ic->ic_curmode)); 2090 2091 /* 2092 * If a long slot station do the slot time bookkeeping. 2093 */ 2094 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2095 KASSERT(ic->ic_longslotsta > 0, 2096 ("bogus long slot station count %d", ic->ic_longslotsta)); 2097 ic->ic_longslotsta--; 2098 IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 2099 "[%s] long slot time station leaves, count now %d\n", 2100 ether_sprintf(ni->ni_macaddr), ic->ic_longslotsta); 2101 if (ic->ic_longslotsta == 0) { 2102 /* 2103 * Re-enable use of short slot time if supported 2104 * and not operating in IBSS mode (per spec). 2105 */ 2106 if ((ic->ic_caps & IEEE80211_C_SHSLOT) && 2107 ic->ic_opmode != IEEE80211_M_IBSS) { 2108 IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 2109 "%s: re-enable use of short slot time\n", 2110 __func__); 2111 ieee80211_set_shortslottime(ic, 1); 2112 } 2113 } 2114 } 2115 /* 2116 * If a non-ERP station do the protection-related bookkeeping. 2117 */ 2118 if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) { 2119 KASSERT(ic->ic_nonerpsta > 0, 2120 ("bogus non-ERP station count %d", ic->ic_nonerpsta)); 2121 ic->ic_nonerpsta--; 2122 IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 2123 "[%s] non-ERP station leaves, count now %d\n", 2124 ether_sprintf(ni->ni_macaddr), ic->ic_nonerpsta); 2125 if (ic->ic_nonerpsta == 0) { 2126 IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 2127 "%s: disable use of protection\n", __func__); 2128 ic->ic_flags &= ~IEEE80211_F_USEPROT; 2129 /* XXX verify mode? */ 2130 if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) { 2131 IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 2132 "%s: re-enable use of short preamble\n", 2133 __func__); 2134 ic->ic_flags |= IEEE80211_F_SHPREAMBLE; 2135 ic->ic_flags &= ~IEEE80211_F_USEBARKER; 2136 } 2137 } 2138 } 2139} 2140 2141/* 2142 * Handle bookkeeping for station deauthentication/disassociation 2143 * when operating as an ap. 2144 */ 2145void 2146ieee80211_node_leave(struct ieee80211com *ic, struct ieee80211_node *ni) 2147{ 2148 struct ieee80211_node_table *nt = ni->ni_table; 2149 2150 IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, 2151 "[%s] station with aid %d leaves\n", 2152 ether_sprintf(ni->ni_macaddr), IEEE80211_NODE_AID(ni)); 2153 2154 KASSERT(ic->ic_opmode == IEEE80211_M_HOSTAP || 2155 ic->ic_opmode == IEEE80211_M_IBSS || 2156 ic->ic_opmode == IEEE80211_M_AHDEMO, 2157 ("unexpected operating mode %u", ic->ic_opmode)); 2158 /* 2159 * If node wasn't previously associated all 2160 * we need to do is reclaim the reference. 2161 */ 2162 /* XXX ibss mode bypasses 11g and notification */ 2163 if (ni->ni_associd == 0) 2164 goto done; 2165 /* 2166 * Tell the authenticator the station is leaving. 2167 * Note that we must do this before yanking the 2168 * association id as the authenticator uses the 2169 * associd to locate it's state block. 2170 */ 2171 if (ic->ic_auth->ia_node_leave != NULL) 2172 ic->ic_auth->ia_node_leave(ic, ni); 2173 IEEE80211_AID_CLR(ni->ni_associd, ic->ic_aid_bitmap); 2174 ni->ni_associd = 0; 2175 ic->ic_sta_assoc--; 2176 2177 if (ic->ic_curmode == IEEE80211_MODE_11G) 2178 ieee80211_node_leave_11g(ic, ni); 2179 /* 2180 * Cleanup station state. In particular clear various 2181 * state that might otherwise be reused if the node 2182 * is reused before the reference count goes to zero 2183 * (and memory is reclaimed). 2184 */ 2185 ieee80211_sta_leave(ic, ni); 2186done: 2187 /* 2188 * Remove the node from any table it's recorded in and 2189 * drop the caller's reference. Removal from the table 2190 * is important to insure the node is not reprocessed 2191 * for inactivity. 2192 */ 2193 if (nt != NULL) { 2194 IEEE80211_NODE_LOCK(nt); 2195 node_reclaim(nt, ni); 2196 IEEE80211_NODE_UNLOCK(nt); 2197 } else 2198 ieee80211_free_node(ni); 2199} 2200 2201u_int8_t 2202ieee80211_getrssi(struct ieee80211com *ic) 2203{ 2204#define NZ(x) ((x) == 0 ? 1 : (x)) 2205 struct ieee80211_node_table *nt = &ic->ic_sta; 2206 u_int32_t rssi_samples, rssi_total; 2207 struct ieee80211_node *ni; 2208 2209 rssi_total = 0; 2210 rssi_samples = 0; 2211 switch (ic->ic_opmode) { 2212 case IEEE80211_M_IBSS: /* average of all ibss neighbors */ 2213 /* XXX locking */ 2214 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) 2215 if (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) { 2216 rssi_samples++; 2217 rssi_total += ic->ic_node_getrssi(ni); 2218 } 2219 break; 2220 case IEEE80211_M_AHDEMO: /* average of all neighbors */ 2221 /* XXX locking */ 2222 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2223 rssi_samples++; 2224 rssi_total += ic->ic_node_getrssi(ni); 2225 } 2226 break; 2227 case IEEE80211_M_HOSTAP: /* average of all associated stations */ 2228 /* XXX locking */ 2229 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) 2230 if (IEEE80211_AID(ni->ni_associd) != 0) { 2231 rssi_samples++; 2232 rssi_total += ic->ic_node_getrssi(ni); 2233 } 2234 break; 2235 case IEEE80211_M_MONITOR: /* XXX */ 2236 case IEEE80211_M_STA: /* use stats from associated ap */ 2237 default: 2238 if (ic->ic_bss != NULL) 2239 rssi_total = ic->ic_node_getrssi(ic->ic_bss); 2240 rssi_samples = 1; 2241 break; 2242 } 2243 return rssi_total / NZ(rssi_samples); 2244#undef NZ 2245} 2246 2247/* 2248 * Indicate whether there are frames queued for a station in power-save mode. 2249 */ 2250static void 2251ieee80211_set_tim(struct ieee80211_node *ni, int set) 2252{ 2253 struct ieee80211com *ic = ni->ni_ic; 2254 u_int16_t aid; 2255 2256 KASSERT(ic->ic_opmode == IEEE80211_M_HOSTAP || 2257 ic->ic_opmode == IEEE80211_M_IBSS, 2258 ("operating mode %u", ic->ic_opmode)); 2259 2260 aid = IEEE80211_AID(ni->ni_associd); 2261 KASSERT(aid < ic->ic_max_aid, 2262 ("bogus aid %u, max %u", aid, ic->ic_max_aid)); 2263 2264 IEEE80211_BEACON_LOCK(ic); 2265 if (set != (isset(ic->ic_tim_bitmap, aid) != 0)) { 2266 if (set) { 2267 setbit(ic->ic_tim_bitmap, aid); 2268 ic->ic_ps_pending++; 2269 } else { 2270 clrbit(ic->ic_tim_bitmap, aid); 2271 ic->ic_ps_pending--; 2272 } 2273 ic->ic_flags |= IEEE80211_F_TIMUPDATE; 2274 } 2275 IEEE80211_BEACON_UNLOCK(ic); 2276} 2277 2278/* 2279 * Node table support. 2280 */ 2281 2282static void 2283ieee80211_node_table_init(struct ieee80211com *ic, 2284 struct ieee80211_node_table *nt, 2285 const char *name, int inact, int keyixmax, 2286 void (*timeout)(struct ieee80211_node_table *)) 2287{ 2288 2289 IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 2290 "%s %s table, inact %u\n", __func__, name, inact); 2291 2292 nt->nt_ic = ic; 2293 /* XXX need unit */ 2294 IEEE80211_NODE_LOCK_INIT(nt, ic->ic_ifp->if_xname); 2295 IEEE80211_SCAN_LOCK_INIT(nt, ic->ic_ifp->if_xname); 2296 TAILQ_INIT(&nt->nt_node); 2297 nt->nt_name = name; 2298 nt->nt_scangen = 1; 2299 nt->nt_inact_init = inact; 2300 nt->nt_timeout = timeout; 2301 nt->nt_keyixmax = keyixmax; 2302 if (nt->nt_keyixmax > 0) { 2303 MALLOC(nt->nt_keyixmap, struct ieee80211_node **, 2304 keyixmax * sizeof(struct ieee80211_node *), 2305 M_80211_NODE, M_NOWAIT | M_ZERO); 2306 if (nt->nt_keyixmap == NULL) 2307 if_printf(ic->ic_ifp, 2308 "Cannot allocate key index map with %u entries\n", 2309 keyixmax); 2310 } else 2311 nt->nt_keyixmap = NULL; 2312} 2313 2314void 2315ieee80211_node_table_reset(struct ieee80211_node_table *nt) 2316{ 2317 2318 IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE, 2319 "%s %s table\n", __func__, nt->nt_name); 2320 2321 IEEE80211_NODE_LOCK(nt); 2322 nt->nt_inact_timer = 0; 2323 ieee80211_free_allnodes_locked(nt); 2324 IEEE80211_NODE_UNLOCK(nt); 2325} 2326 2327static void 2328ieee80211_node_table_cleanup(struct ieee80211_node_table *nt) 2329{ 2330 2331 IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE, 2332 "%s %s table\n", __func__, nt->nt_name); 2333 2334 IEEE80211_NODE_LOCK(nt); 2335 ieee80211_free_allnodes_locked(nt); 2336 if (nt->nt_keyixmap != NULL) { 2337 /* XXX verify all entries are NULL */ 2338 int i; 2339 for (i = 0; i < nt->nt_keyixmax; i++) 2340 if (nt->nt_keyixmap[i] != NULL) 2341 printf("%s: %s[%u] still active\n", __func__, 2342 nt->nt_name, i); 2343 FREE(nt->nt_keyixmap, M_80211_NODE); 2344 nt->nt_keyixmap = NULL; 2345 } 2346 IEEE80211_SCAN_LOCK_DESTROY(nt); 2347 IEEE80211_NODE_LOCK_DESTROY(nt); 2348} 2349