ieee80211_node.c revision 186302
1/*- 2 * Copyright (c) 2001 Atsushi Onoe 3 * Copyright (c) 2002-2008 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 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27#include <sys/cdefs.h> 28__FBSDID("$FreeBSD: head/sys/net80211/ieee80211_node.c 186302 2008-12-18 23:00:09Z sam $"); 29 30#include "opt_wlan.h" 31 32#include <sys/param.h> 33#include <sys/systm.h> 34#include <sys/mbuf.h> 35#include <sys/malloc.h> 36#include <sys/kernel.h> 37 38#include <sys/socket.h> 39 40#include <net/if.h> 41#include <net/if_media.h> 42#include <net/ethernet.h> 43 44#include <net80211/ieee80211_var.h> 45#include <net80211/ieee80211_input.h> 46#include <net80211/ieee80211_wds.h> 47 48#include <net/bpf.h> 49 50/* 51 * Association id's are managed with a bit vector. 52 */ 53#define IEEE80211_AID_SET(_vap, b) \ 54 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] |= \ 55 (1 << (IEEE80211_AID(b) % 32))) 56#define IEEE80211_AID_CLR(_vap, b) \ 57 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] &= \ 58 ~(1 << (IEEE80211_AID(b) % 32))) 59#define IEEE80211_AID_ISSET(_vap, b) \ 60 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] & (1 << (IEEE80211_AID(b) % 32))) 61 62#ifdef IEEE80211_DEBUG_REFCNT 63#define REFCNT_LOC "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line 64#else 65#define REFCNT_LOC "%s %p<%s> refcnt %d\n", __func__ 66#endif 67 68static int ieee80211_sta_join1(struct ieee80211_node *); 69 70static struct ieee80211_node *node_alloc(struct ieee80211vap *, 71 const uint8_t [IEEE80211_ADDR_LEN]); 72static void node_cleanup(struct ieee80211_node *); 73static void node_free(struct ieee80211_node *); 74static void node_age(struct ieee80211_node *); 75static int8_t node_getrssi(const struct ieee80211_node *); 76static void node_getsignal(const struct ieee80211_node *, int8_t *, int8_t *); 77static void node_getmimoinfo(const struct ieee80211_node *, 78 struct ieee80211_mimo_info *); 79 80static void _ieee80211_free_node(struct ieee80211_node *); 81 82static void ieee80211_node_table_init(struct ieee80211com *ic, 83 struct ieee80211_node_table *nt, const char *name, 84 int inact, int keymaxix); 85static void ieee80211_node_table_reset(struct ieee80211_node_table *, 86 struct ieee80211vap *); 87static void ieee80211_node_reclaim(struct ieee80211_node *); 88static void ieee80211_node_table_cleanup(struct ieee80211_node_table *nt); 89static void ieee80211_erp_timeout(struct ieee80211com *); 90 91MALLOC_DEFINE(M_80211_NODE, "80211node", "802.11 node state"); 92MALLOC_DEFINE(M_80211_NODE_IE, "80211nodeie", "802.11 node ie"); 93 94void 95ieee80211_node_attach(struct ieee80211com *ic) 96{ 97 ieee80211_node_table_init(ic, &ic->ic_sta, "station", 98 IEEE80211_INACT_INIT, ic->ic_max_keyix); 99 callout_init(&ic->ic_inact, CALLOUT_MPSAFE); 100 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, 101 ieee80211_node_timeout, ic); 102 103 ic->ic_node_alloc = node_alloc; 104 ic->ic_node_free = node_free; 105 ic->ic_node_cleanup = node_cleanup; 106 ic->ic_node_age = node_age; 107 ic->ic_node_drain = node_age; /* NB: same as age */ 108 ic->ic_node_getrssi = node_getrssi; 109 ic->ic_node_getsignal = node_getsignal; 110 ic->ic_node_getmimoinfo = node_getmimoinfo; 111 112 /* 113 * Set flags to be propagated to all vap's; 114 * these define default behaviour/configuration. 115 */ 116 ic->ic_flags_ext |= IEEE80211_FEXT_INACT; /* inactivity processing */ 117} 118 119void 120ieee80211_node_detach(struct ieee80211com *ic) 121{ 122 123 callout_drain(&ic->ic_inact); 124 ieee80211_node_table_cleanup(&ic->ic_sta); 125} 126 127void 128ieee80211_node_vattach(struct ieee80211vap *vap) 129{ 130 /* NB: driver can override */ 131 vap->iv_max_aid = IEEE80211_AID_DEF; 132 133 /* default station inactivity timer setings */ 134 vap->iv_inact_init = IEEE80211_INACT_INIT; 135 vap->iv_inact_auth = IEEE80211_INACT_AUTH; 136 vap->iv_inact_run = IEEE80211_INACT_RUN; 137 vap->iv_inact_probe = IEEE80211_INACT_PROBE; 138 139 IEEE80211_DPRINTF(vap, IEEE80211_MSG_INACT, 140 "%s: init %u auth %u run %u probe %u\n", __func__, 141 vap->iv_inact_init, vap->iv_inact_auth, 142 vap->iv_inact_run, vap->iv_inact_probe); 143} 144 145void 146ieee80211_node_latevattach(struct ieee80211vap *vap) 147{ 148 if (vap->iv_opmode == IEEE80211_M_HOSTAP) { 149 /* XXX should we allow max aid to be zero? */ 150 if (vap->iv_max_aid < IEEE80211_AID_MIN) { 151 vap->iv_max_aid = IEEE80211_AID_MIN; 152 if_printf(vap->iv_ifp, 153 "WARNING: max aid too small, changed to %d\n", 154 vap->iv_max_aid); 155 } 156 vap->iv_aid_bitmap = (uint32_t *) malloc( 157 howmany(vap->iv_max_aid, 32) * sizeof(uint32_t), 158 M_80211_NODE, M_NOWAIT | M_ZERO); 159 if (vap->iv_aid_bitmap == NULL) { 160 /* XXX no way to recover */ 161 printf("%s: no memory for AID bitmap, max aid %d!\n", 162 __func__, vap->iv_max_aid); 163 vap->iv_max_aid = 0; 164 } 165 } 166 167 ieee80211_reset_bss(vap); 168 169 vap->iv_auth = ieee80211_authenticator_get(vap->iv_bss->ni_authmode); 170} 171 172void 173ieee80211_node_vdetach(struct ieee80211vap *vap) 174{ 175 struct ieee80211com *ic = vap->iv_ic; 176 177 ieee80211_node_table_reset(&ic->ic_sta, vap); 178 if (vap->iv_bss != NULL) { 179 ieee80211_free_node(vap->iv_bss); 180 vap->iv_bss = NULL; 181 } 182 if (vap->iv_aid_bitmap != NULL) { 183 free(vap->iv_aid_bitmap, M_80211_NODE); 184 vap->iv_aid_bitmap = NULL; 185 } 186} 187 188/* 189 * Port authorize/unauthorize interfaces for use by an authenticator. 190 */ 191 192void 193ieee80211_node_authorize(struct ieee80211_node *ni) 194{ 195 struct ieee80211vap *vap = ni->ni_vap; 196 197 ni->ni_flags |= IEEE80211_NODE_AUTH; 198 ni->ni_inact_reload = vap->iv_inact_run; 199 ni->ni_inact = ni->ni_inact_reload; 200 201 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 202 "%s: inact_reload %u", __func__, ni->ni_inact_reload); 203} 204 205void 206ieee80211_node_unauthorize(struct ieee80211_node *ni) 207{ 208 struct ieee80211vap *vap = ni->ni_vap; 209 210 ni->ni_flags &= ~IEEE80211_NODE_AUTH; 211 ni->ni_inact_reload = vap->iv_inact_auth; 212 if (ni->ni_inact > ni->ni_inact_reload) 213 ni->ni_inact = ni->ni_inact_reload; 214 215 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 216 "%s: inact_reload %u inact %u", __func__, 217 ni->ni_inact_reload, ni->ni_inact); 218} 219 220/* 221 * Fix tx parameters for a node according to ``association state''. 222 */ 223static void 224node_setuptxparms(struct ieee80211_node *ni) 225{ 226 struct ieee80211vap *vap = ni->ni_vap; 227 228 if (ni->ni_flags & IEEE80211_NODE_HT) { 229 if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan)) 230 ni->ni_txparms = &vap->iv_txparms[IEEE80211_MODE_11NA]; 231 else 232 ni->ni_txparms = &vap->iv_txparms[IEEE80211_MODE_11NG]; 233 } else { /* legacy rate handling */ 234 if (IEEE80211_IS_CHAN_A(ni->ni_chan)) 235 ni->ni_txparms = &vap->iv_txparms[IEEE80211_MODE_11A]; 236 else if (ni->ni_flags & IEEE80211_NODE_ERP) 237 ni->ni_txparms = &vap->iv_txparms[IEEE80211_MODE_11G]; 238 else 239 ni->ni_txparms = &vap->iv_txparms[IEEE80211_MODE_11B]; 240 } 241} 242 243/* 244 * Set/change the channel. The rate set is also updated as 245 * to insure a consistent view by drivers. 246 * XXX should be private but hostap needs it to deal with CSA 247 */ 248void 249ieee80211_node_set_chan(struct ieee80211_node *ni, 250 struct ieee80211_channel *chan) 251{ 252 struct ieee80211com *ic = ni->ni_ic; 253 struct ieee80211vap *vap = ni->ni_vap; 254 enum ieee80211_phymode mode; 255 256 KASSERT(chan != IEEE80211_CHAN_ANYC, ("no channel")); 257 258 ni->ni_chan = chan; 259 mode = ieee80211_chan2mode(chan); 260 if (IEEE80211_IS_CHAN_HT(chan)) { 261 /* 262 * XXX Gotta be careful here; the rate set returned by 263 * ieee80211_get_suprates is actually any HT rate 264 * set so blindly copying it will be bad. We must 265 * install the legacy rate est in ni_rates and the 266 * HT rate set in ni_htrates. 267 */ 268 ni->ni_htrates = *ieee80211_get_suphtrates(ic, chan); 269 /* 270 * Setup bss tx parameters based on operating mode. We 271 * use legacy rates when operating in a mixed HT+non-HT bss 272 * and non-ERP rates in 11g for mixed ERP+non-ERP bss. 273 */ 274 if (mode == IEEE80211_MODE_11NA && 275 (vap->iv_flags_ext & IEEE80211_FEXT_PUREN) == 0) 276 mode = IEEE80211_MODE_11A; 277 else if (mode == IEEE80211_MODE_11NG && 278 (vap->iv_flags_ext & IEEE80211_FEXT_PUREN) == 0) 279 mode = IEEE80211_MODE_11G; 280 if (mode == IEEE80211_MODE_11G && 281 (vap->iv_flags & IEEE80211_F_PUREG) == 0) 282 mode = IEEE80211_MODE_11B; 283 } 284 ni->ni_txparms = &vap->iv_txparms[mode]; 285 ni->ni_rates = *ieee80211_get_suprates(ic, chan); 286} 287 288static __inline void 289copy_bss(struct ieee80211_node *nbss, const struct ieee80211_node *obss) 290{ 291 /* propagate useful state */ 292 nbss->ni_authmode = obss->ni_authmode; 293 nbss->ni_txpower = obss->ni_txpower; 294 nbss->ni_vlan = obss->ni_vlan; 295 /* XXX statistics? */ 296 /* XXX legacy WDS bssid? */ 297} 298 299void 300ieee80211_create_ibss(struct ieee80211vap* vap, struct ieee80211_channel *chan) 301{ 302 struct ieee80211com *ic = vap->iv_ic; 303 struct ieee80211_node *ni; 304 305 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, 306 "%s: creating ibss on channel %u\n", __func__, 307 ieee80211_chan2ieee(ic, chan)); 308 309 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr); 310 if (ni == NULL) { 311 /* XXX recovery? */ 312 return; 313 } 314 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr); 315 ni->ni_esslen = vap->iv_des_ssid[0].len; 316 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen); 317 if (vap->iv_bss != NULL) 318 copy_bss(ni, vap->iv_bss); 319 ni->ni_intval = ic->ic_bintval; 320 if (vap->iv_flags & IEEE80211_F_PRIVACY) 321 ni->ni_capinfo |= IEEE80211_CAPINFO_PRIVACY; 322 if (ic->ic_phytype == IEEE80211_T_FH) { 323 ni->ni_fhdwell = 200; /* XXX */ 324 ni->ni_fhindex = 1; 325 } 326 if (vap->iv_opmode == IEEE80211_M_IBSS) { 327 vap->iv_flags |= IEEE80211_F_SIBSS; 328 ni->ni_capinfo |= IEEE80211_CAPINFO_IBSS; /* XXX */ 329 if (vap->iv_flags & IEEE80211_F_DESBSSID) 330 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid); 331 else { 332 get_random_bytes(ni->ni_bssid, IEEE80211_ADDR_LEN); 333 /* clear group bit, add local bit */ 334 ni->ni_bssid[0] = (ni->ni_bssid[0] &~ 0x01) | 0x02; 335 } 336 } else if (vap->iv_opmode == IEEE80211_M_AHDEMO) { 337 if (vap->iv_flags & IEEE80211_F_DESBSSID) 338 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid); 339 else 340 memset(ni->ni_bssid, 0, IEEE80211_ADDR_LEN); 341 } 342 /* 343 * Fix the channel and related attributes. 344 */ 345 /* clear DFS CAC state on previous channel */ 346 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC && 347 ic->ic_bsschan->ic_freq != chan->ic_freq && 348 IEEE80211_IS_CHAN_CACDONE(ic->ic_bsschan)) 349 ieee80211_dfs_cac_clear(ic, ic->ic_bsschan); 350 ic->ic_bsschan = chan; 351 ieee80211_node_set_chan(ni, chan); 352 ic->ic_curmode = ieee80211_chan2mode(chan); 353 /* 354 * Do mode-specific setup. 355 */ 356 if (IEEE80211_IS_CHAN_FULL(chan)) { 357 if (IEEE80211_IS_CHAN_ANYG(chan)) { 358 /* 359 * Use a mixed 11b/11g basic rate set. 360 */ 361 ieee80211_setbasicrates(&ni->ni_rates, 362 IEEE80211_MODE_11G); 363 if (vap->iv_flags & IEEE80211_F_PUREG) { 364 /* 365 * Also mark OFDM rates basic so 11b 366 * stations do not join (WiFi compliance). 367 */ 368 ieee80211_addbasicrates(&ni->ni_rates, 369 IEEE80211_MODE_11A); 370 } 371 } else if (IEEE80211_IS_CHAN_B(chan)) { 372 /* 373 * Force pure 11b rate set. 374 */ 375 ieee80211_setbasicrates(&ni->ni_rates, 376 IEEE80211_MODE_11B); 377 } 378 } 379 380 (void) ieee80211_sta_join1(ieee80211_ref_node(ni)); 381} 382 383/* 384 * Reset bss state on transition to the INIT state. 385 * Clear any stations from the table (they have been 386 * deauth'd) and reset the bss node (clears key, rate 387 * etc. state). 388 */ 389void 390ieee80211_reset_bss(struct ieee80211vap *vap) 391{ 392 struct ieee80211com *ic = vap->iv_ic; 393 struct ieee80211_node *ni, *obss; 394 395 ieee80211_node_table_reset(&ic->ic_sta, vap); 396 /* XXX multi-bss: wrong */ 397 ieee80211_reset_erp(ic); 398 399 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr); 400 KASSERT(ni != NULL, ("unable to setup inital BSS node")); 401 obss = vap->iv_bss; 402 vap->iv_bss = ieee80211_ref_node(ni); 403 if (obss != NULL) { 404 copy_bss(ni, obss); 405 ni->ni_intval = ic->ic_bintval; 406 ieee80211_free_node(obss); 407 } else 408 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr); 409} 410 411static int 412match_ssid(const struct ieee80211_node *ni, 413 int nssid, const struct ieee80211_scan_ssid ssids[]) 414{ 415 int i; 416 417 for (i = 0; i < nssid; i++) { 418 if (ni->ni_esslen == ssids[i].len && 419 memcmp(ni->ni_essid, ssids[i].ssid, ni->ni_esslen) == 0) 420 return 1; 421 } 422 return 0; 423} 424 425/* 426 * Test a node for suitability/compatibility. 427 */ 428static int 429check_bss(struct ieee80211vap *vap, struct ieee80211_node *ni) 430{ 431 struct ieee80211com *ic = ni->ni_ic; 432 uint8_t rate; 433 434 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 435 return 0; 436 if (vap->iv_opmode == IEEE80211_M_IBSS) { 437 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 438 return 0; 439 } else { 440 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 441 return 0; 442 } 443 if (vap->iv_flags & IEEE80211_F_PRIVACY) { 444 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 445 return 0; 446 } else { 447 /* XXX does this mean privacy is supported or required? */ 448 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 449 return 0; 450 } 451 rate = ieee80211_fix_rate(ni, &ni->ni_rates, 452 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 453 if (rate & IEEE80211_RATE_BASIC) 454 return 0; 455 if (vap->iv_des_nssid != 0 && 456 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid)) 457 return 0; 458 if ((vap->iv_flags & IEEE80211_F_DESBSSID) && 459 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid)) 460 return 0; 461 return 1; 462} 463 464#ifdef IEEE80211_DEBUG 465/* 466 * Display node suitability/compatibility. 467 */ 468static void 469check_bss_debug(struct ieee80211vap *vap, struct ieee80211_node *ni) 470{ 471 struct ieee80211com *ic = ni->ni_ic; 472 uint8_t rate; 473 int fail; 474 475 fail = 0; 476 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 477 fail |= 0x01; 478 if (vap->iv_opmode == IEEE80211_M_IBSS) { 479 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 480 fail |= 0x02; 481 } else { 482 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 483 fail |= 0x02; 484 } 485 if (vap->iv_flags & IEEE80211_F_PRIVACY) { 486 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 487 fail |= 0x04; 488 } else { 489 /* XXX does this mean privacy is supported or required? */ 490 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 491 fail |= 0x04; 492 } 493 rate = ieee80211_fix_rate(ni, &ni->ni_rates, 494 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 495 if (rate & IEEE80211_RATE_BASIC) 496 fail |= 0x08; 497 if (vap->iv_des_nssid != 0 && 498 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid)) 499 fail |= 0x10; 500 if ((vap->iv_flags & IEEE80211_F_DESBSSID) && 501 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid)) 502 fail |= 0x20; 503 504 printf(" %c %s", fail ? '-' : '+', ether_sprintf(ni->ni_macaddr)); 505 printf(" %s%c", ether_sprintf(ni->ni_bssid), fail & 0x20 ? '!' : ' '); 506 printf(" %3d%c", 507 ieee80211_chan2ieee(ic, ni->ni_chan), fail & 0x01 ? '!' : ' '); 508 printf(" %2dM%c", (rate & IEEE80211_RATE_VAL) / 2, 509 fail & 0x08 ? '!' : ' '); 510 printf(" %4s%c", 511 (ni->ni_capinfo & IEEE80211_CAPINFO_ESS) ? "ess" : 512 (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) ? "ibss" : 513 "????", 514 fail & 0x02 ? '!' : ' '); 515 printf(" %3s%c ", 516 (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) ? "wep" : "no", 517 fail & 0x04 ? '!' : ' '); 518 ieee80211_print_essid(ni->ni_essid, ni->ni_esslen); 519 printf("%s\n", fail & 0x10 ? "!" : ""); 520} 521#endif /* IEEE80211_DEBUG */ 522 523/* 524 * Handle 802.11 ad hoc network merge. The 525 * convention, set by the Wireless Ethernet Compatibility Alliance 526 * (WECA), is that an 802.11 station will change its BSSID to match 527 * the "oldest" 802.11 ad hoc network, on the same channel, that 528 * has the station's desired SSID. The "oldest" 802.11 network 529 * sends beacons with the greatest TSF timestamp. 530 * 531 * The caller is assumed to validate TSF's before attempting a merge. 532 * 533 * Return !0 if the BSSID changed, 0 otherwise. 534 */ 535int 536ieee80211_ibss_merge(struct ieee80211_node *ni) 537{ 538 struct ieee80211vap *vap = ni->ni_vap; 539#ifdef IEEE80211_DEBUG 540 struct ieee80211com *ic = ni->ni_ic; 541#endif 542 543 if (ni == vap->iv_bss || 544 IEEE80211_ADDR_EQ(ni->ni_bssid, vap->iv_bss->ni_bssid)) { 545 /* unchanged, nothing to do */ 546 return 0; 547 } 548 if (!check_bss(vap, ni)) { 549 /* capabilities mismatch */ 550 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 551 "%s: merge failed, capabilities mismatch\n", __func__); 552#ifdef IEEE80211_DEBUG 553 if (ieee80211_msg_assoc(vap)) 554 check_bss_debug(vap, ni); 555#endif 556 vap->iv_stats.is_ibss_capmismatch++; 557 return 0; 558 } 559 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 560 "%s: new bssid %s: %s preamble, %s slot time%s\n", __func__, 561 ether_sprintf(ni->ni_bssid), 562 ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long", 563 ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long", 564 ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : "" 565 ); 566 return ieee80211_sta_join1(ieee80211_ref_node(ni)); 567} 568 569/* 570 * Calculate HT channel promotion flags for all vaps. 571 * This assumes ni_chan have been setup for each vap. 572 */ 573static int 574gethtadjustflags(struct ieee80211com *ic) 575{ 576 struct ieee80211vap *vap; 577 int flags; 578 579 flags = 0; 580 /* XXX locking */ 581 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 582 if (vap->iv_state < IEEE80211_S_RUN) 583 continue; 584 switch (vap->iv_opmode) { 585 case IEEE80211_M_WDS: 586 case IEEE80211_M_STA: 587 case IEEE80211_M_AHDEMO: 588 case IEEE80211_M_HOSTAP: 589 case IEEE80211_M_IBSS: 590 flags |= ieee80211_htchanflags(vap->iv_bss->ni_chan); 591 break; 592 default: 593 break; 594 } 595 } 596 return flags; 597} 598 599/* 600 * Check if the current channel needs to change based on whether 601 * any vap's are using HT20/HT40. This is used to sync the state 602 * of ic_curchan after a channel width change on a running vap. 603 */ 604void 605ieee80211_sync_curchan(struct ieee80211com *ic) 606{ 607 struct ieee80211_channel *c; 608 609 c = ieee80211_ht_adjust_channel(ic, ic->ic_curchan, gethtadjustflags(ic)); 610 if (c != ic->ic_curchan) { 611 ic->ic_curchan = c; 612 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan); 613 ic->ic_set_channel(ic); 614 } 615} 616 617/* 618 * Change the current channel. The request channel may be 619 * promoted if other vap's are operating with HT20/HT40. 620 */ 621void 622ieee80211_setcurchan(struct ieee80211com *ic, struct ieee80211_channel *c) 623{ 624 if (ic->ic_htcaps & IEEE80211_HTC_HT) { 625 int flags = gethtadjustflags(ic); 626 /* 627 * Check for channel promotion required to support the 628 * set of running vap's. This assumes we are called 629 * after ni_chan is setup for each vap. 630 */ 631 /* NB: this assumes IEEE80211_FEXT_USEHT40 > IEEE80211_FEXT_HT */ 632 if (flags > ieee80211_htchanflags(c)) 633 c = ieee80211_ht_adjust_channel(ic, c, flags); 634 } 635 ic->ic_bsschan = ic->ic_curchan = c; 636 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan); 637 ic->ic_set_channel(ic); 638} 639 640/* 641 * Join the specified IBSS/BSS network. The node is assumed to 642 * be passed in with a held reference. 643 */ 644static int 645ieee80211_sta_join1(struct ieee80211_node *selbs) 646{ 647 struct ieee80211vap *vap = selbs->ni_vap; 648 struct ieee80211com *ic = selbs->ni_ic; 649 struct ieee80211_node *obss; 650 int canreassoc; 651 652 /* 653 * Committed to selbs, setup state. 654 */ 655 obss = vap->iv_bss; 656 /* 657 * Check if old+new node have the same address in which 658 * case we can reassociate when operating in sta mode. 659 */ 660 canreassoc = (obss != NULL && 661 vap->iv_state == IEEE80211_S_RUN && 662 IEEE80211_ADDR_EQ(obss->ni_macaddr, selbs->ni_macaddr)); 663 vap->iv_bss = selbs; /* NB: caller assumed to bump refcnt */ 664 if (obss != NULL) { 665 copy_bss(selbs, obss); 666 ieee80211_node_reclaim(obss); 667 obss = NULL; /* NB: guard against later use */ 668 } 669 670 /* 671 * Delete unusable rates; we've already checked 672 * that the negotiated rate set is acceptable. 673 */ 674 ieee80211_fix_rate(vap->iv_bss, &vap->iv_bss->ni_rates, 675 IEEE80211_F_DODEL | IEEE80211_F_JOIN); 676 677 ieee80211_setcurchan(ic, selbs->ni_chan); 678 /* 679 * Set the erp state (mostly the slot time) to deal with 680 * the auto-select case; this should be redundant if the 681 * mode is locked. 682 */ 683 ieee80211_reset_erp(ic); 684 ieee80211_wme_initparams(vap); 685 686 if (vap->iv_opmode == IEEE80211_M_STA) { 687 if (canreassoc) { 688 /* Reassociate */ 689 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 1); 690 } else { 691 /* 692 * Act as if we received a DEAUTH frame in case we 693 * are invoked from the RUN state. This will cause 694 * us to try to re-authenticate if we are operating 695 * as a station. 696 */ 697 ieee80211_new_state(vap, IEEE80211_S_AUTH, 698 IEEE80211_FC0_SUBTYPE_DEAUTH); 699 } 700 } else 701 ieee80211_new_state(vap, IEEE80211_S_RUN, -1); 702 return 1; 703} 704 705int 706ieee80211_sta_join(struct ieee80211vap *vap, struct ieee80211_channel *chan, 707 const struct ieee80211_scan_entry *se) 708{ 709 struct ieee80211com *ic = vap->iv_ic; 710 struct ieee80211_node *ni; 711 712 ni = ieee80211_alloc_node(&ic->ic_sta, vap, se->se_macaddr); 713 if (ni == NULL) { 714 /* XXX msg */ 715 return 0; 716 } 717 /* 718 * Expand scan state into node's format. 719 * XXX may not need all this stuff 720 */ 721 IEEE80211_ADDR_COPY(ni->ni_bssid, se->se_bssid); 722 ni->ni_esslen = se->se_ssid[1]; 723 memcpy(ni->ni_essid, se->se_ssid+2, ni->ni_esslen); 724 ni->ni_rstamp = se->se_rstamp; 725 ni->ni_tstamp.tsf = se->se_tstamp.tsf; 726 ni->ni_intval = se->se_intval; 727 ni->ni_capinfo = se->se_capinfo; 728 ni->ni_chan = chan; 729 ni->ni_timoff = se->se_timoff; 730 ni->ni_fhdwell = se->se_fhdwell; 731 ni->ni_fhindex = se->se_fhindex; 732 ni->ni_erp = se->se_erp; 733 IEEE80211_RSSI_LPF(ni->ni_avgrssi, se->se_rssi); 734 ni->ni_noise = se->se_noise; 735 ni->ni_flags |= IEEE80211_NODE_ASSOCID; 736 737 if (ieee80211_ies_init(&ni->ni_ies, se->se_ies.data, se->se_ies.len)) { 738 ieee80211_ies_expand(&ni->ni_ies); 739 if (ni->ni_ies.ath_ie != NULL) 740 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 741 if (ni->ni_ies.htcap_ie != NULL) 742 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie); 743 if (ni->ni_ies.htinfo_ie != NULL) 744 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie); 745 } 746 747 vap->iv_dtim_period = se->se_dtimperiod; 748 vap->iv_dtim_count = 0; 749 750 /* NB: must be after ni_chan is setup */ 751 ieee80211_setup_rates(ni, se->se_rates, se->se_xrates, 752 IEEE80211_F_DOSORT); 753 if (ieee80211_iserp_rateset(&ni->ni_rates)) 754 ni->ni_flags |= IEEE80211_NODE_ERP; 755 node_setuptxparms(ni); 756 757 return ieee80211_sta_join1(ieee80211_ref_node(ni)); 758} 759 760/* 761 * Leave the specified IBSS/BSS network. The node is assumed to 762 * be passed in with a held reference. 763 */ 764void 765ieee80211_sta_leave(struct ieee80211_node *ni) 766{ 767 struct ieee80211com *ic = ni->ni_ic; 768 769 ic->ic_node_cleanup(ni); 770 ieee80211_notify_node_leave(ni); 771} 772 773/* 774 * Send a deauthenticate frame and drop the station. 775 */ 776void 777ieee80211_node_deauth(struct ieee80211_node *ni, int reason) 778{ 779 /* NB: bump the refcnt to be sure temporay nodes are not reclaimed */ 780 ieee80211_ref_node(ni); 781 if (ni->ni_associd != 0) 782 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH, reason); 783 ieee80211_node_leave(ni); 784 ieee80211_free_node(ni); 785} 786 787static struct ieee80211_node * 788node_alloc(struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 789{ 790 struct ieee80211_node *ni; 791 792 ni = (struct ieee80211_node *) malloc(sizeof(struct ieee80211_node), 793 M_80211_NODE, M_NOWAIT | M_ZERO); 794 return ni; 795} 796 797/* 798 * Initialize an ie blob with the specified data. If previous 799 * data exists re-use the data block. As a side effect we clear 800 * all references to specific ie's; the caller is required to 801 * recalculate them. 802 */ 803int 804ieee80211_ies_init(struct ieee80211_ies *ies, const uint8_t *data, int len) 805{ 806 /* NB: assumes data+len are the last fields */ 807 memset(ies, 0, offsetof(struct ieee80211_ies, data)); 808 if (ies->data != NULL && ies->len != len) { 809 /* data size changed */ 810 free(ies->data, M_80211_NODE_IE); 811 ies->data = NULL; 812 } 813 if (ies->data == NULL) { 814 ies->data = (uint8_t *) malloc(len, M_80211_NODE_IE, M_NOWAIT); 815 if (ies->data == NULL) { 816 ies->len = 0; 817 /* NB: pointers have already been zero'd above */ 818 return 0; 819 } 820 } 821 memcpy(ies->data, data, len); 822 ies->len = len; 823 return 1; 824} 825 826/* 827 * Reclaim storage for an ie blob. 828 */ 829void 830ieee80211_ies_cleanup(struct ieee80211_ies *ies) 831{ 832 if (ies->data != NULL) 833 free(ies->data, M_80211_NODE_IE); 834} 835 836/* 837 * Expand an ie blob data contents and to fillin individual 838 * ie pointers. The data blob is assumed to be well-formed; 839 * we don't do any validity checking of ie lengths. 840 */ 841void 842ieee80211_ies_expand(struct ieee80211_ies *ies) 843{ 844 uint8_t *ie; 845 int ielen; 846 847 ie = ies->data; 848 ielen = ies->len; 849 while (ielen > 0) { 850 switch (ie[0]) { 851 case IEEE80211_ELEMID_VENDOR: 852 if (iswpaoui(ie)) 853 ies->wpa_ie = ie; 854 else if (iswmeoui(ie)) 855 ies->wme_ie = ie; 856 else if (isatherosoui(ie)) 857 ies->ath_ie = ie; 858 break; 859 case IEEE80211_ELEMID_RSN: 860 ies->rsn_ie = ie; 861 break; 862 case IEEE80211_ELEMID_HTCAP: 863 ies->htcap_ie = ie; 864 break; 865 } 866 ielen -= 2 + ie[1]; 867 ie += 2 + ie[1]; 868 } 869} 870 871/* 872 * Reclaim any resources in a node and reset any critical 873 * state. Typically nodes are free'd immediately after, 874 * but in some cases the storage may be reused so we need 875 * to insure consistent state (should probably fix that). 876 */ 877static void 878node_cleanup(struct ieee80211_node *ni) 879{ 880#define N(a) (sizeof(a)/sizeof(a[0])) 881 struct ieee80211vap *vap = ni->ni_vap; 882 int i; 883 884 /* NB: preserve ni_table */ 885 if (ni->ni_flags & IEEE80211_NODE_PWR_MGT) { 886 if (vap->iv_opmode != IEEE80211_M_STA) 887 vap->iv_ps_sta--; 888 ni->ni_flags &= ~IEEE80211_NODE_PWR_MGT; 889 IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni, 890 "power save mode off, %u sta's in ps mode", vap->iv_ps_sta); 891 } 892 /* 893 * Cleanup any HT-related state. 894 */ 895 if (ni->ni_flags & IEEE80211_NODE_HT) 896 ieee80211_ht_node_cleanup(ni); 897 /* 898 * Clear AREF flag that marks the authorization refcnt bump 899 * has happened. This is probably not needed as the node 900 * should always be removed from the table so not found but 901 * do it just in case. 902 * Likewise clear the ASSOCID flag as these flags are intended 903 * to be managed in tandem. 904 */ 905 ni->ni_flags &= ~(IEEE80211_NODE_AREF | IEEE80211_NODE_ASSOCID); 906 907 /* 908 * Drain power save queue and, if needed, clear TIM. 909 */ 910 if (ieee80211_node_psq_drain(ni) != 0 && vap->iv_set_tim != NULL) 911 vap->iv_set_tim(ni, 0); 912 913 ni->ni_associd = 0; 914 if (ni->ni_challenge != NULL) { 915 free(ni->ni_challenge, M_80211_NODE); 916 ni->ni_challenge = NULL; 917 } 918 /* 919 * Preserve SSID, WPA, and WME ie's so the bss node is 920 * reusable during a re-auth/re-assoc state transition. 921 * If we remove these data they will not be recreated 922 * because they come from a probe-response or beacon frame 923 * which cannot be expected prior to the association-response. 924 * This should not be an issue when operating in other modes 925 * as stations leaving always go through a full state transition 926 * which will rebuild this state. 927 * 928 * XXX does this leave us open to inheriting old state? 929 */ 930 for (i = 0; i < N(ni->ni_rxfrag); i++) 931 if (ni->ni_rxfrag[i] != NULL) { 932 m_freem(ni->ni_rxfrag[i]); 933 ni->ni_rxfrag[i] = NULL; 934 } 935 /* 936 * Must be careful here to remove any key map entry w/o a LOR. 937 */ 938 ieee80211_node_delucastkey(ni); 939#undef N 940} 941 942static void 943node_free(struct ieee80211_node *ni) 944{ 945 struct ieee80211com *ic = ni->ni_ic; 946 947 ic->ic_node_cleanup(ni); 948 ieee80211_ies_cleanup(&ni->ni_ies); 949 ieee80211_psq_cleanup(&ni->ni_psq); 950 IEEE80211_NODE_WDSQ_DESTROY(ni); 951 free(ni, M_80211_NODE); 952} 953 954static void 955node_age(struct ieee80211_node *ni) 956{ 957 struct ieee80211vap *vap = ni->ni_vap; 958 959 IEEE80211_NODE_LOCK_ASSERT(&vap->iv_ic->ic_sta); 960 961 /* 962 * Age frames on the power save queue. 963 */ 964 if (ieee80211_node_psq_age(ni) != 0 && 965 ni->ni_psq.psq_len == 0 && vap->iv_set_tim != NULL) 966 vap->iv_set_tim(ni, 0); 967 /* 968 * Age frames on the wds pending queue. 969 */ 970 if (IEEE80211_NODE_WDSQ_QLEN(ni) != 0) 971 ieee80211_node_wdsq_age(ni); 972 /* 973 * Age out HT resources (e.g. frames on the 974 * A-MPDU reorder queues). 975 */ 976 if (ni->ni_associd != 0 && (ni->ni_flags & IEEE80211_NODE_HT)) 977 ieee80211_ht_node_age(ni); 978} 979 980static int8_t 981node_getrssi(const struct ieee80211_node *ni) 982{ 983 uint32_t avgrssi = ni->ni_avgrssi; 984 int32_t rssi; 985 986 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) 987 return 0; 988 rssi = IEEE80211_RSSI_GET(avgrssi); 989 return rssi < 0 ? 0 : rssi > 127 ? 127 : rssi; 990} 991 992static void 993node_getsignal(const struct ieee80211_node *ni, int8_t *rssi, int8_t *noise) 994{ 995 *rssi = node_getrssi(ni); 996 *noise = ni->ni_noise; 997} 998 999static void 1000node_getmimoinfo(const struct ieee80211_node *ni, 1001 struct ieee80211_mimo_info *info) 1002{ 1003 /* XXX zero data? */ 1004} 1005 1006struct ieee80211_node * 1007ieee80211_alloc_node(struct ieee80211_node_table *nt, 1008 struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1009{ 1010 struct ieee80211com *ic = nt->nt_ic; 1011 struct ieee80211_node *ni; 1012 int hash; 1013 1014 ni = ic->ic_node_alloc(vap, macaddr); 1015 if (ni == NULL) { 1016 vap->iv_stats.is_rx_nodealloc++; 1017 return NULL; 1018 } 1019 1020 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1021 "%s %p<%s> in %s table\n", __func__, ni, 1022 ether_sprintf(macaddr), nt->nt_name); 1023 1024 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1025 hash = IEEE80211_NODE_HASH(macaddr); 1026 ieee80211_node_initref(ni); /* mark referenced */ 1027 ni->ni_chan = IEEE80211_CHAN_ANYC; 1028 ni->ni_authmode = IEEE80211_AUTH_OPEN; 1029 ni->ni_txpower = ic->ic_txpowlimit; /* max power */ 1030 ni->ni_txparms = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)]; 1031 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE); 1032 ni->ni_avgrssi = IEEE80211_RSSI_DUMMY_MARKER; 1033 ni->ni_inact_reload = nt->nt_inact_init; 1034 ni->ni_inact = ni->ni_inact_reload; 1035 ni->ni_ath_defkeyix = 0x7fff; 1036 ieee80211_psq_init(&ni->ni_psq, "unknown"); 1037 IEEE80211_NODE_WDSQ_INIT(ni, "unknown"); 1038 1039 IEEE80211_NODE_LOCK(nt); 1040 TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list); 1041 LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash); 1042 ni->ni_table = nt; 1043 ni->ni_vap = vap; 1044 ni->ni_ic = ic; 1045 IEEE80211_NODE_UNLOCK(nt); 1046 1047 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 1048 "%s: inact_reload %u", __func__, ni->ni_inact_reload); 1049 1050 return ni; 1051} 1052 1053/* 1054 * Craft a temporary node suitable for sending a management frame 1055 * to the specified station. We craft only as much state as we 1056 * need to do the work since the node will be immediately reclaimed 1057 * once the send completes. 1058 */ 1059struct ieee80211_node * 1060ieee80211_tmp_node(struct ieee80211vap *vap, 1061 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1062{ 1063 struct ieee80211com *ic = vap->iv_ic; 1064 struct ieee80211_node *ni; 1065 1066 ni = ic->ic_node_alloc(vap, macaddr); 1067 if (ni != NULL) { 1068 struct ieee80211_node *bss = vap->iv_bss; 1069 1070 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1071 "%s %p<%s>\n", __func__, ni, ether_sprintf(macaddr)); 1072 1073 ni->ni_table = NULL; /* NB: pedantic */ 1074 ni->ni_ic = ic; /* NB: needed to set channel */ 1075 ni->ni_vap = vap; 1076 1077 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1078 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1079 ieee80211_node_initref(ni); /* mark referenced */ 1080 /* NB: required by ieee80211_fix_rate */ 1081 ieee80211_node_set_chan(ni, bss->ni_chan); 1082 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, 1083 IEEE80211_KEYIX_NONE); 1084 ni->ni_txpower = bss->ni_txpower; 1085 /* XXX optimize away */ 1086 ieee80211_psq_init(&ni->ni_psq, "unknown"); 1087 IEEE80211_NODE_WDSQ_INIT(ni, "unknown"); 1088 } else { 1089 /* XXX msg */ 1090 vap->iv_stats.is_rx_nodealloc++; 1091 } 1092 return ni; 1093} 1094 1095struct ieee80211_node * 1096ieee80211_dup_bss(struct ieee80211vap *vap, 1097 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1098{ 1099 struct ieee80211com *ic = vap->iv_ic; 1100 struct ieee80211_node *ni; 1101 1102 ni = ieee80211_alloc_node(&ic->ic_sta, vap, macaddr); 1103 if (ni != NULL) { 1104 struct ieee80211_node *bss = vap->iv_bss; 1105 /* 1106 * Inherit from iv_bss. 1107 */ 1108 copy_bss(ni, bss); 1109 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1110 ieee80211_node_set_chan(ni, bss->ni_chan); 1111 } 1112 return ni; 1113} 1114 1115/* 1116 * Create a bss node for a legacy WDS vap. The far end does 1117 * not associate so we just create create a new node and 1118 * simulate an association. The caller is responsible for 1119 * installing the node as the bss node and handling any further 1120 * setup work like authorizing the port. 1121 */ 1122struct ieee80211_node * 1123ieee80211_node_create_wds(struct ieee80211vap *vap, 1124 const uint8_t bssid[IEEE80211_ADDR_LEN], struct ieee80211_channel *chan) 1125{ 1126 struct ieee80211com *ic = vap->iv_ic; 1127 struct ieee80211_node *ni; 1128 1129 /* XXX check if node already in sta table? */ 1130 ni = ieee80211_alloc_node(&ic->ic_sta, vap, bssid); 1131 if (ni != NULL) { 1132 ni->ni_wdsvap = vap; 1133 IEEE80211_ADDR_COPY(ni->ni_bssid, bssid); 1134 /* 1135 * Inherit any manually configured settings. 1136 */ 1137 copy_bss(ni, vap->iv_bss); 1138 ieee80211_node_set_chan(ni, chan); 1139 /* NB: propagate ssid so available to WPA supplicant */ 1140 ni->ni_esslen = vap->iv_des_ssid[0].len; 1141 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen); 1142 /* NB: no associd for peer */ 1143 /* 1144 * There are no management frames to use to 1145 * discover neighbor capabilities, so blindly 1146 * propagate the local configuration. 1147 */ 1148 if (vap->iv_flags & IEEE80211_F_WME) 1149 ni->ni_flags |= IEEE80211_NODE_QOS; 1150 if (vap->iv_flags & IEEE80211_F_FF) 1151 ni->ni_flags |= IEEE80211_NODE_FF; 1152 if ((ic->ic_htcaps & IEEE80211_HTC_HT) && 1153 (vap->iv_flags_ext & IEEE80211_FEXT_HT)) { 1154 /* 1155 * Device is HT-capable and HT is enabled for 1156 * the vap; setup HT operation. On return 1157 * ni_chan will be adjusted to an HT channel. 1158 */ 1159 ieee80211_ht_wds_init(ni); 1160 } else { 1161 struct ieee80211_channel *c = ni->ni_chan; 1162 /* 1163 * Force a legacy channel to be used. 1164 */ 1165 c = ieee80211_find_channel(ic, 1166 c->ic_freq, c->ic_flags &~ IEEE80211_CHAN_HT); 1167 KASSERT(c != NULL, ("no legacy channel, %u/%x", 1168 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags)); 1169 ni->ni_chan = c; 1170 } 1171 } 1172 return ni; 1173} 1174 1175struct ieee80211_node * 1176#ifdef IEEE80211_DEBUG_REFCNT 1177ieee80211_find_node_locked_debug(struct ieee80211_node_table *nt, 1178 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1179#else 1180ieee80211_find_node_locked(struct ieee80211_node_table *nt, 1181 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1182#endif 1183{ 1184 struct ieee80211_node *ni; 1185 int hash; 1186 1187 IEEE80211_NODE_LOCK_ASSERT(nt); 1188 1189 hash = IEEE80211_NODE_HASH(macaddr); 1190 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1191 if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1192 ieee80211_ref_node(ni); /* mark referenced */ 1193#ifdef IEEE80211_DEBUG_REFCNT 1194 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1195 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1196 func, line, 1197 ni, ether_sprintf(ni->ni_macaddr), 1198 ieee80211_node_refcnt(ni)); 1199#endif 1200 return ni; 1201 } 1202 } 1203 return NULL; 1204} 1205 1206struct ieee80211_node * 1207#ifdef IEEE80211_DEBUG_REFCNT 1208ieee80211_find_node_debug(struct ieee80211_node_table *nt, 1209 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1210#else 1211ieee80211_find_node(struct ieee80211_node_table *nt, 1212 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1213#endif 1214{ 1215 struct ieee80211_node *ni; 1216 1217 IEEE80211_NODE_LOCK(nt); 1218 ni = ieee80211_find_node_locked(nt, macaddr); 1219 IEEE80211_NODE_UNLOCK(nt); 1220 return ni; 1221} 1222 1223struct ieee80211_node * 1224#ifdef IEEE80211_DEBUG_REFCNT 1225ieee80211_find_vap_node_locked_debug(struct ieee80211_node_table *nt, 1226 const struct ieee80211vap *vap, 1227 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1228#else 1229ieee80211_find_vap_node_locked(struct ieee80211_node_table *nt, 1230 const struct ieee80211vap *vap, 1231 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1232#endif 1233{ 1234 struct ieee80211_node *ni; 1235 int hash; 1236 1237 IEEE80211_NODE_LOCK_ASSERT(nt); 1238 1239 hash = IEEE80211_NODE_HASH(macaddr); 1240 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1241 if (ni->ni_vap == vap && 1242 IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1243 ieee80211_ref_node(ni); /* mark referenced */ 1244#ifdef IEEE80211_DEBUG_REFCNT 1245 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1246 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1247 func, line, 1248 ni, ether_sprintf(ni->ni_macaddr), 1249 ieee80211_node_refcnt(ni)); 1250#endif 1251 return ni; 1252 } 1253 } 1254 return NULL; 1255} 1256 1257struct ieee80211_node * 1258#ifdef IEEE80211_DEBUG_REFCNT 1259ieee80211_find_vap_node_debug(struct ieee80211_node_table *nt, 1260 const struct ieee80211vap *vap, 1261 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1262#else 1263ieee80211_find_vap_node(struct ieee80211_node_table *nt, 1264 const struct ieee80211vap *vap, 1265 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1266#endif 1267{ 1268 struct ieee80211_node *ni; 1269 1270 IEEE80211_NODE_LOCK(nt); 1271 ni = ieee80211_find_vap_node_locked(nt, vap, macaddr); 1272 IEEE80211_NODE_UNLOCK(nt); 1273 return ni; 1274} 1275 1276/* 1277 * Fake up a node; this handles node discovery in adhoc mode. 1278 * Note that for the driver's benefit we we treat this like 1279 * an association so the driver has an opportunity to setup 1280 * it's private state. 1281 */ 1282struct ieee80211_node * 1283ieee80211_fakeup_adhoc_node(struct ieee80211vap *vap, 1284 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1285{ 1286 struct ieee80211_node *ni; 1287 1288 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1289 "%s: mac<%s>\n", __func__, ether_sprintf(macaddr)); 1290 ni = ieee80211_dup_bss(vap, macaddr); 1291 if (ni != NULL) { 1292 struct ieee80211com *ic = vap->iv_ic; 1293 1294 /* XXX no rate negotiation; just dup */ 1295 ni->ni_rates = vap->iv_bss->ni_rates; 1296 if (vap->iv_opmode == IEEE80211_M_AHDEMO) { 1297 /* 1298 * In adhoc demo mode there are no management 1299 * frames to use to discover neighbor capabilities, 1300 * so blindly propagate the local configuration 1301 * so we can do interesting things (e.g. use 1302 * WME to disable ACK's). 1303 */ 1304 if (vap->iv_flags & IEEE80211_F_WME) 1305 ni->ni_flags |= IEEE80211_NODE_QOS; 1306 if (vap->iv_flags & IEEE80211_F_FF) 1307 ni->ni_flags |= IEEE80211_NODE_FF; 1308 } 1309 node_setuptxparms(ni); 1310 if (ic->ic_newassoc != NULL) 1311 ic->ic_newassoc(ni, 1); 1312 /* XXX not right for 802.1x/WPA */ 1313 ieee80211_node_authorize(ni); 1314 } 1315 return ni; 1316} 1317 1318void 1319ieee80211_init_neighbor(struct ieee80211_node *ni, 1320 const struct ieee80211_frame *wh, 1321 const struct ieee80211_scanparams *sp) 1322{ 1323 ni->ni_esslen = sp->ssid[1]; 1324 memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]); 1325 IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3); 1326 memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp)); 1327 ni->ni_intval = sp->bintval; 1328 ni->ni_capinfo = sp->capinfo; 1329 ni->ni_chan = ni->ni_ic->ic_curchan; 1330 ni->ni_fhdwell = sp->fhdwell; 1331 ni->ni_fhindex = sp->fhindex; 1332 ni->ni_erp = sp->erp; 1333 ni->ni_timoff = sp->timoff; 1334 1335 if (ieee80211_ies_init(&ni->ni_ies, sp->ies, sp->ies_len)) { 1336 ieee80211_ies_expand(&ni->ni_ies); 1337 if (ni->ni_ies.ath_ie != NULL) 1338 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 1339 } 1340 1341 /* NB: must be after ni_chan is setup */ 1342 ieee80211_setup_rates(ni, sp->rates, sp->xrates, 1343 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 1344 IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 1345} 1346 1347/* 1348 * Do node discovery in adhoc mode on receipt of a beacon 1349 * or probe response frame. Note that for the driver's 1350 * benefit we we treat this like an association so the 1351 * driver has an opportunity to setup it's private state. 1352 */ 1353struct ieee80211_node * 1354ieee80211_add_neighbor(struct ieee80211vap *vap, 1355 const struct ieee80211_frame *wh, 1356 const struct ieee80211_scanparams *sp) 1357{ 1358 struct ieee80211_node *ni; 1359 1360 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1361 "%s: mac<%s>\n", __func__, ether_sprintf(wh->i_addr2)); 1362 ni = ieee80211_dup_bss(vap, wh->i_addr2);/* XXX alloc_node? */ 1363 if (ni != NULL) { 1364 struct ieee80211com *ic = vap->iv_ic; 1365 1366 ieee80211_init_neighbor(ni, wh, sp); 1367 node_setuptxparms(ni); 1368 if (ic->ic_newassoc != NULL) 1369 ic->ic_newassoc(ni, 1); 1370 /* XXX not right for 802.1x/WPA */ 1371 ieee80211_node_authorize(ni); 1372 } 1373 return ni; 1374} 1375 1376#define IS_CTL(wh) \ 1377 ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) == IEEE80211_FC0_TYPE_CTL) 1378#define IS_PSPOLL(wh) \ 1379 ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == IEEE80211_FC0_SUBTYPE_PS_POLL) 1380#define IS_BAR(wh) \ 1381 ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == IEEE80211_FC0_SUBTYPE_BAR) 1382#define IS_PROBEREQ(wh) \ 1383 ((wh->i_fc[0] & (IEEE80211_FC0_TYPE_MASK|IEEE80211_FC0_SUBTYPE_MASK)) \ 1384 == (IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ)) 1385#define IS_BCAST_PROBEREQ(wh) \ 1386 (IS_PROBEREQ(wh) && IEEE80211_IS_MULTICAST( \ 1387 ((const struct ieee80211_frame *)(wh))->i_addr3)) 1388 1389static __inline struct ieee80211_node * 1390_find_rxnode(struct ieee80211_node_table *nt, 1391 const struct ieee80211_frame_min *wh) 1392{ 1393 /* XXX 4-address frames? */ 1394 if (IS_CTL(wh) && !IS_PSPOLL(wh) && !IS_BAR(wh) /*&& !IS_RTS(ah)*/) 1395 return ieee80211_find_node_locked(nt, wh->i_addr1); 1396 if (IS_BCAST_PROBEREQ(wh)) 1397 return NULL; /* spam bcast probe req to all vap's */ 1398 return ieee80211_find_node_locked(nt, wh->i_addr2); 1399} 1400 1401/* 1402 * Locate the node for sender, track state, and then pass the 1403 * (referenced) node up to the 802.11 layer for its use. Note 1404 * we can return NULL if the sender is not in the table. 1405 */ 1406struct ieee80211_node * 1407#ifdef IEEE80211_DEBUG_REFCNT 1408ieee80211_find_rxnode_debug(struct ieee80211com *ic, 1409 const struct ieee80211_frame_min *wh, const char *func, int line) 1410#else 1411ieee80211_find_rxnode(struct ieee80211com *ic, 1412 const struct ieee80211_frame_min *wh) 1413#endif 1414{ 1415 struct ieee80211_node_table *nt; 1416 struct ieee80211_node *ni; 1417 1418 nt = &ic->ic_sta; 1419 IEEE80211_NODE_LOCK(nt); 1420 ni = _find_rxnode(nt, wh); 1421 IEEE80211_NODE_UNLOCK(nt); 1422 1423 return ni; 1424} 1425 1426/* 1427 * Like ieee80211_find_rxnode but use the supplied h/w 1428 * key index as a hint to locate the node in the key 1429 * mapping table. If an entry is present at the key 1430 * index we return it; otherwise do a normal lookup and 1431 * update the mapping table if the station has a unicast 1432 * key assigned to it. 1433 */ 1434struct ieee80211_node * 1435#ifdef IEEE80211_DEBUG_REFCNT 1436ieee80211_find_rxnode_withkey_debug(struct ieee80211com *ic, 1437 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix, 1438 const char *func, int line) 1439#else 1440ieee80211_find_rxnode_withkey(struct ieee80211com *ic, 1441 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix) 1442#endif 1443{ 1444 struct ieee80211_node_table *nt; 1445 struct ieee80211_node *ni; 1446 1447 nt = &ic->ic_sta; 1448 IEEE80211_NODE_LOCK(nt); 1449 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) 1450 ni = nt->nt_keyixmap[keyix]; 1451 else 1452 ni = NULL; 1453 if (ni == NULL) { 1454 ni = _find_rxnode(nt, wh); 1455 if (ni != NULL && nt->nt_keyixmap != NULL) { 1456 /* 1457 * If the station has a unicast key cache slot 1458 * assigned update the key->node mapping table. 1459 */ 1460 keyix = ni->ni_ucastkey.wk_rxkeyix; 1461 /* XXX can keyixmap[keyix] != NULL? */ 1462 if (keyix < nt->nt_keyixmax && 1463 nt->nt_keyixmap[keyix] == NULL) { 1464 IEEE80211_DPRINTF(ni->ni_vap, 1465 IEEE80211_MSG_NODE, 1466 "%s: add key map entry %p<%s> refcnt %d\n", 1467 __func__, ni, ether_sprintf(ni->ni_macaddr), 1468 ieee80211_node_refcnt(ni)+1); 1469 nt->nt_keyixmap[keyix] = ieee80211_ref_node(ni); 1470 } 1471 } 1472 } else { 1473 if (IS_BCAST_PROBEREQ(wh)) 1474 ni = NULL; /* spam bcast probe req to all vap's */ 1475 else 1476 ieee80211_ref_node(ni); 1477 } 1478 IEEE80211_NODE_UNLOCK(nt); 1479 1480 return ni; 1481} 1482#undef IS_BCAST_PROBEREQ 1483#undef IS_PROBEREQ 1484#undef IS_BAR 1485#undef IS_PSPOLL 1486#undef IS_CTL 1487 1488/* 1489 * Return a reference to the appropriate node for sending 1490 * a data frame. This handles node discovery in adhoc networks. 1491 */ 1492struct ieee80211_node * 1493#ifdef IEEE80211_DEBUG_REFCNT 1494ieee80211_find_txnode_debug(struct ieee80211vap *vap, 1495 const uint8_t macaddr[IEEE80211_ADDR_LEN], 1496 const char *func, int line) 1497#else 1498ieee80211_find_txnode(struct ieee80211vap *vap, 1499 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1500#endif 1501{ 1502 struct ieee80211_node_table *nt = &vap->iv_ic->ic_sta; 1503 struct ieee80211_node *ni; 1504 1505 /* 1506 * The destination address should be in the node table 1507 * unless this is a multicast/broadcast frame. We can 1508 * also optimize station mode operation, all frames go 1509 * to the bss node. 1510 */ 1511 /* XXX can't hold lock across dup_bss 'cuz of recursive locking */ 1512 IEEE80211_NODE_LOCK(nt); 1513 if (vap->iv_opmode == IEEE80211_M_STA || 1514 vap->iv_opmode == IEEE80211_M_WDS || 1515 IEEE80211_IS_MULTICAST(macaddr)) 1516 ni = ieee80211_ref_node(vap->iv_bss); 1517 else 1518 ni = ieee80211_find_node_locked(nt, macaddr); 1519 IEEE80211_NODE_UNLOCK(nt); 1520 1521 if (ni == NULL) { 1522 if (vap->iv_opmode == IEEE80211_M_IBSS || 1523 vap->iv_opmode == IEEE80211_M_AHDEMO) { 1524 /* 1525 * In adhoc mode cons up a node for the destination. 1526 * Note that we need an additional reference for the 1527 * caller to be consistent with 1528 * ieee80211_find_node_locked. 1529 */ 1530 ni = ieee80211_fakeup_adhoc_node(vap, macaddr); 1531 if (ni != NULL) 1532 (void) ieee80211_ref_node(ni); 1533 } else { 1534 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, macaddr, 1535 "no node, discard frame (%s)", __func__); 1536 vap->iv_stats.is_tx_nonode++; 1537 } 1538 } 1539 return ni; 1540} 1541 1542static void 1543_ieee80211_free_node(struct ieee80211_node *ni) 1544{ 1545 struct ieee80211_node_table *nt = ni->ni_table; 1546 1547 /* 1548 * NB: careful about referencing the vap as it may be 1549 * gone if the last reference was held by a driver. 1550 * We know the com will always be present so it's safe 1551 * to use ni_ic below to reclaim resources. 1552 */ 1553#if 0 1554 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1555 "%s %p<%s> in %s table\n", __func__, ni, 1556 ether_sprintf(ni->ni_macaddr), 1557 nt != NULL ? nt->nt_name : "<gone>"); 1558#endif 1559 if (ni->ni_associd != 0) { 1560 struct ieee80211vap *vap = ni->ni_vap; 1561 if (vap->iv_aid_bitmap != NULL) 1562 IEEE80211_AID_CLR(vap, ni->ni_associd); 1563 } 1564 if (nt != NULL) { 1565 TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1566 LIST_REMOVE(ni, ni_hash); 1567 } 1568 ni->ni_ic->ic_node_free(ni); 1569} 1570 1571void 1572#ifdef IEEE80211_DEBUG_REFCNT 1573ieee80211_free_node_debug(struct ieee80211_node *ni, const char *func, int line) 1574#else 1575ieee80211_free_node(struct ieee80211_node *ni) 1576#endif 1577{ 1578 struct ieee80211_node_table *nt = ni->ni_table; 1579 1580#ifdef IEEE80211_DEBUG_REFCNT 1581 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1582 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni, 1583 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1); 1584#endif 1585 if (nt != NULL) { 1586 IEEE80211_NODE_LOCK(nt); 1587 if (ieee80211_node_dectestref(ni)) { 1588 /* 1589 * Last reference, reclaim state. 1590 */ 1591 _ieee80211_free_node(ni); 1592 } else if (ieee80211_node_refcnt(ni) == 1 && 1593 nt->nt_keyixmap != NULL) { 1594 ieee80211_keyix keyix; 1595 /* 1596 * Check for a last reference in the key mapping table. 1597 */ 1598 keyix = ni->ni_ucastkey.wk_rxkeyix; 1599 if (keyix < nt->nt_keyixmax && 1600 nt->nt_keyixmap[keyix] == ni) { 1601 IEEE80211_DPRINTF(ni->ni_vap, 1602 IEEE80211_MSG_NODE, 1603 "%s: %p<%s> clear key map entry", __func__, 1604 ni, ether_sprintf(ni->ni_macaddr)); 1605 nt->nt_keyixmap[keyix] = NULL; 1606 ieee80211_node_decref(ni); /* XXX needed? */ 1607 _ieee80211_free_node(ni); 1608 } 1609 } 1610 IEEE80211_NODE_UNLOCK(nt); 1611 } else { 1612 if (ieee80211_node_dectestref(ni)) 1613 _ieee80211_free_node(ni); 1614 } 1615} 1616 1617/* 1618 * Reclaim a unicast key and clear any key cache state. 1619 */ 1620int 1621ieee80211_node_delucastkey(struct ieee80211_node *ni) 1622{ 1623 struct ieee80211com *ic = ni->ni_ic; 1624 struct ieee80211_node_table *nt = &ic->ic_sta; 1625 struct ieee80211_node *nikey; 1626 ieee80211_keyix keyix; 1627 int isowned, status; 1628 1629 /* 1630 * NB: We must beware of LOR here; deleting the key 1631 * can cause the crypto layer to block traffic updates 1632 * which can generate a LOR against the node table lock; 1633 * grab it here and stash the key index for our use below. 1634 * 1635 * Must also beware of recursion on the node table lock. 1636 * When called from node_cleanup we may already have 1637 * the node table lock held. Unfortunately there's no 1638 * way to separate out this path so we must do this 1639 * conditionally. 1640 */ 1641 isowned = IEEE80211_NODE_IS_LOCKED(nt); 1642 if (!isowned) 1643 IEEE80211_NODE_LOCK(nt); 1644 nikey = NULL; 1645 status = 1; /* NB: success */ 1646 if (ni->ni_ucastkey.wk_keyix != IEEE80211_KEYIX_NONE) { 1647 keyix = ni->ni_ucastkey.wk_rxkeyix; 1648 status = ieee80211_crypto_delkey(ni->ni_vap, &ni->ni_ucastkey); 1649 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) { 1650 nikey = nt->nt_keyixmap[keyix]; 1651 nt->nt_keyixmap[keyix] = NULL;; 1652 } 1653 } 1654 if (!isowned) 1655 IEEE80211_NODE_UNLOCK(nt); 1656 1657 if (nikey != NULL) { 1658 KASSERT(nikey == ni, 1659 ("key map out of sync, ni %p nikey %p", ni, nikey)); 1660 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1661 "%s: delete key map entry %p<%s> refcnt %d\n", 1662 __func__, ni, ether_sprintf(ni->ni_macaddr), 1663 ieee80211_node_refcnt(ni)-1); 1664 ieee80211_free_node(ni); 1665 } 1666 return status; 1667} 1668 1669/* 1670 * Reclaim a node. If this is the last reference count then 1671 * do the normal free work. Otherwise remove it from the node 1672 * table and mark it gone by clearing the back-reference. 1673 */ 1674static void 1675node_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 1676{ 1677 ieee80211_keyix keyix; 1678 1679 IEEE80211_NODE_LOCK_ASSERT(nt); 1680 1681 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1682 "%s: remove %p<%s> from %s table, refcnt %d\n", 1683 __func__, ni, ether_sprintf(ni->ni_macaddr), 1684 nt->nt_name, ieee80211_node_refcnt(ni)-1); 1685 /* 1686 * Clear any entry in the unicast key mapping table. 1687 * We need to do it here so rx lookups don't find it 1688 * in the mapping table even if it's not in the hash 1689 * table. We cannot depend on the mapping table entry 1690 * being cleared because the node may not be free'd. 1691 */ 1692 keyix = ni->ni_ucastkey.wk_rxkeyix; 1693 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax && 1694 nt->nt_keyixmap[keyix] == ni) { 1695 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1696 "%s: %p<%s> clear key map entry\n", 1697 __func__, ni, ether_sprintf(ni->ni_macaddr)); 1698 nt->nt_keyixmap[keyix] = NULL; 1699 ieee80211_node_decref(ni); /* NB: don't need free */ 1700 } 1701 if (!ieee80211_node_dectestref(ni)) { 1702 /* 1703 * Other references are present, just remove the 1704 * node from the table so it cannot be found. When 1705 * the references are dropped storage will be 1706 * reclaimed. 1707 */ 1708 TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1709 LIST_REMOVE(ni, ni_hash); 1710 ni->ni_table = NULL; /* clear reference */ 1711 } else 1712 _ieee80211_free_node(ni); 1713} 1714 1715/* 1716 * Reclaim a (bss) node. Decrement the refcnt and reclaim 1717 * the node if the only other reference to it is in the sta 1718 * table. This is effectively ieee80211_free_node followed 1719 * by node_reclaim when the refcnt is 1 (after the free). 1720 */ 1721static void 1722ieee80211_node_reclaim(struct ieee80211_node *ni) 1723{ 1724 struct ieee80211_node_table *nt = ni->ni_table; 1725 1726 KASSERT(nt != NULL, ("reclaim node not in table")); 1727 1728#ifdef IEEE80211_DEBUG_REFCNT 1729 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1730 "%s %p<%s> refcnt %d\n", __func__, ni, 1731 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1); 1732#endif 1733 IEEE80211_NODE_LOCK(nt); 1734 if (ieee80211_node_dectestref(ni)) { 1735 /* 1736 * Last reference, reclaim state. 1737 */ 1738 _ieee80211_free_node(ni); 1739 nt = NULL; 1740 } else if (ieee80211_node_refcnt(ni) == 1 && 1741 nt->nt_keyixmap != NULL) { 1742 ieee80211_keyix keyix; 1743 /* 1744 * Check for a last reference in the key mapping table. 1745 */ 1746 keyix = ni->ni_ucastkey.wk_rxkeyix; 1747 if (keyix < nt->nt_keyixmax && 1748 nt->nt_keyixmap[keyix] == ni) { 1749 IEEE80211_DPRINTF(ni->ni_vap, 1750 IEEE80211_MSG_NODE, 1751 "%s: %p<%s> clear key map entry", __func__, 1752 ni, ether_sprintf(ni->ni_macaddr)); 1753 nt->nt_keyixmap[keyix] = NULL; 1754 ieee80211_node_decref(ni); /* XXX needed? */ 1755 _ieee80211_free_node(ni); 1756 nt = NULL; 1757 } 1758 } 1759 if (nt != NULL && ieee80211_node_refcnt(ni) == 1) { 1760 /* 1761 * Last reference is in the sta table; complete 1762 * the reclaim. This handles bss nodes being 1763 * recycled: the node has two references, one for 1764 * iv_bss and one for the table. After dropping 1765 * the iv_bss ref above we need to reclaim the sta 1766 * table reference. 1767 */ 1768 ieee80211_node_decref(ni); /* NB: be pendantic */ 1769 _ieee80211_free_node(ni); 1770 } 1771 IEEE80211_NODE_UNLOCK(nt); 1772} 1773 1774/* 1775 * Node table support. 1776 */ 1777 1778static void 1779ieee80211_node_table_init(struct ieee80211com *ic, 1780 struct ieee80211_node_table *nt, 1781 const char *name, int inact, int keyixmax) 1782{ 1783 struct ifnet *ifp = ic->ic_ifp; 1784 1785 nt->nt_ic = ic; 1786 IEEE80211_NODE_LOCK_INIT(nt, ifp->if_xname); 1787 IEEE80211_NODE_ITERATE_LOCK_INIT(nt, ifp->if_xname); 1788 TAILQ_INIT(&nt->nt_node); 1789 nt->nt_name = name; 1790 nt->nt_scangen = 1; 1791 nt->nt_inact_init = inact; 1792 nt->nt_keyixmax = keyixmax; 1793 if (nt->nt_keyixmax > 0) { 1794 nt->nt_keyixmap = (struct ieee80211_node **) malloc( 1795 keyixmax * sizeof(struct ieee80211_node *), 1796 M_80211_NODE, M_NOWAIT | M_ZERO); 1797 if (nt->nt_keyixmap == NULL) 1798 if_printf(ic->ic_ifp, 1799 "Cannot allocate key index map with %u entries\n", 1800 keyixmax); 1801 } else 1802 nt->nt_keyixmap = NULL; 1803} 1804 1805static void 1806ieee80211_node_table_reset(struct ieee80211_node_table *nt, 1807 struct ieee80211vap *match) 1808{ 1809 struct ieee80211_node *ni, *next; 1810 1811 IEEE80211_NODE_LOCK(nt); 1812 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) { 1813 if (match != NULL && ni->ni_vap != match) 1814 continue; 1815 /* XXX can this happen? if so need's work */ 1816 if (ni->ni_associd != 0) { 1817 struct ieee80211vap *vap = ni->ni_vap; 1818 1819 if (vap->iv_auth->ia_node_leave != NULL) 1820 vap->iv_auth->ia_node_leave(ni); 1821 if (vap->iv_aid_bitmap != NULL) 1822 IEEE80211_AID_CLR(vap, ni->ni_associd); 1823 } 1824 ni->ni_wdsvap = NULL; /* clear reference */ 1825 node_reclaim(nt, ni); 1826 } 1827 if (match != NULL && match->iv_opmode == IEEE80211_M_WDS) { 1828 /* 1829 * Make a separate pass to clear references to this vap 1830 * held by DWDS entries. They will not be matched above 1831 * because ni_vap will point to the ap vap but we still 1832 * need to clear ni_wdsvap when the WDS vap is destroyed 1833 * and/or reset. 1834 */ 1835 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) 1836 if (ni->ni_wdsvap == match) 1837 ni->ni_wdsvap = NULL; 1838 } 1839 IEEE80211_NODE_UNLOCK(nt); 1840} 1841 1842static void 1843ieee80211_node_table_cleanup(struct ieee80211_node_table *nt) 1844{ 1845 ieee80211_node_table_reset(nt, NULL); 1846 if (nt->nt_keyixmap != NULL) { 1847#ifdef DIAGNOSTIC 1848 /* XXX verify all entries are NULL */ 1849 int i; 1850 for (i = 0; i < nt->nt_keyixmax; i++) 1851 if (nt->nt_keyixmap[i] != NULL) 1852 printf("%s: %s[%u] still active\n", __func__, 1853 nt->nt_name, i); 1854#endif 1855 free(nt->nt_keyixmap, M_80211_NODE); 1856 nt->nt_keyixmap = NULL; 1857 } 1858 IEEE80211_NODE_ITERATE_LOCK_DESTROY(nt); 1859 IEEE80211_NODE_LOCK_DESTROY(nt); 1860} 1861 1862/* 1863 * Timeout inactive stations and do related housekeeping. 1864 * Note that we cannot hold the node lock while sending a 1865 * frame as this would lead to a LOR. Instead we use a 1866 * generation number to mark nodes that we've scanned and 1867 * drop the lock and restart a scan if we have to time out 1868 * a node. Since we are single-threaded by virtue of 1869 * controlling the inactivity timer we can be sure this will 1870 * process each node only once. 1871 */ 1872static void 1873ieee80211_timeout_stations(struct ieee80211com *ic) 1874{ 1875 struct ieee80211_node_table *nt = &ic->ic_sta; 1876 struct ieee80211vap *vap; 1877 struct ieee80211_node *ni; 1878 int gen = 0; 1879 1880 IEEE80211_NODE_ITERATE_LOCK(nt); 1881 gen = ++nt->nt_scangen; 1882restart: 1883 IEEE80211_NODE_LOCK(nt); 1884 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 1885 if (ni->ni_scangen == gen) /* previously handled */ 1886 continue; 1887 ni->ni_scangen = gen; 1888 /* 1889 * Ignore entries for which have yet to receive an 1890 * authentication frame. These are transient and 1891 * will be reclaimed when the last reference to them 1892 * goes away (when frame xmits complete). 1893 */ 1894 vap = ni->ni_vap; 1895 /* 1896 * Only process stations when in RUN state. This 1897 * insures, for example, that we don't timeout an 1898 * inactive station during CAC. Note that CSA state 1899 * is actually handled in ieee80211_node_timeout as 1900 * it applies to more than timeout processing. 1901 */ 1902 if (vap->iv_state != IEEE80211_S_RUN) 1903 continue; 1904 /* XXX can vap be NULL? */ 1905 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 1906 vap->iv_opmode == IEEE80211_M_STA) && 1907 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 1908 continue; 1909 /* 1910 * Free fragment if not needed anymore 1911 * (last fragment older than 1s). 1912 * XXX doesn't belong here, move to node_age 1913 */ 1914 if (ni->ni_rxfrag[0] != NULL && 1915 ticks > ni->ni_rxfragstamp + hz) { 1916 m_freem(ni->ni_rxfrag[0]); 1917 ni->ni_rxfrag[0] = NULL; 1918 } 1919 if (ni->ni_inact > 0) { 1920 ni->ni_inact--; 1921 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 1922 "%s: inact %u inact_reload %u nrates %u", 1923 __func__, ni->ni_inact, ni->ni_inact_reload, 1924 ni->ni_rates.rs_nrates); 1925 } 1926 /* 1927 * Special case ourself; we may be idle for extended periods 1928 * of time and regardless reclaiming our state is wrong. 1929 * XXX run ic_node_age 1930 */ 1931 if (ni == vap->iv_bss) 1932 continue; 1933 if (ni->ni_associd != 0 || 1934 (vap->iv_opmode == IEEE80211_M_IBSS || 1935 vap->iv_opmode == IEEE80211_M_AHDEMO)) { 1936 /* 1937 * Age/drain resources held by the station. 1938 */ 1939 ic->ic_node_age(ni); 1940 /* 1941 * Probe the station before time it out. We 1942 * send a null data frame which may not be 1943 * universally supported by drivers (need it 1944 * for ps-poll support so it should be...). 1945 * 1946 * XXX don't probe the station unless we've 1947 * received a frame from them (and have 1948 * some idea of the rates they are capable 1949 * of); this will get fixed more properly 1950 * soon with better handling of the rate set. 1951 */ 1952 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 1953 (0 < ni->ni_inact && 1954 ni->ni_inact <= vap->iv_inact_probe) && 1955 ni->ni_rates.rs_nrates != 0) { 1956 IEEE80211_NOTE(vap, 1957 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, 1958 ni, "%s", 1959 "probe station due to inactivity"); 1960 /* 1961 * Grab a reference before unlocking the table 1962 * so the node cannot be reclaimed before we 1963 * send the frame. ieee80211_send_nulldata 1964 * understands we've done this and reclaims the 1965 * ref for us as needed. 1966 */ 1967 ieee80211_ref_node(ni); 1968 IEEE80211_NODE_UNLOCK(nt); 1969 ieee80211_send_nulldata(ni); 1970 /* XXX stat? */ 1971 goto restart; 1972 } 1973 } 1974 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 1975 ni->ni_inact <= 0) { 1976 IEEE80211_NOTE(vap, 1977 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, ni, 1978 "station timed out due to inactivity " 1979 "(refcnt %u)", ieee80211_node_refcnt(ni)); 1980 /* 1981 * Send a deauthenticate frame and drop the station. 1982 * This is somewhat complicated due to reference counts 1983 * and locking. At this point a station will typically 1984 * have a reference count of 1. ieee80211_node_leave 1985 * will do a "free" of the node which will drop the 1986 * reference count. But in the meantime a reference 1987 * wil be held by the deauth frame. The actual reclaim 1988 * of the node will happen either after the tx is 1989 * completed or by ieee80211_node_leave. 1990 * 1991 * Separately we must drop the node lock before sending 1992 * in case the driver takes a lock, as this can result 1993 * in a LOR between the node lock and the driver lock. 1994 */ 1995 ieee80211_ref_node(ni); 1996 IEEE80211_NODE_UNLOCK(nt); 1997 if (ni->ni_associd != 0) { 1998 IEEE80211_SEND_MGMT(ni, 1999 IEEE80211_FC0_SUBTYPE_DEAUTH, 2000 IEEE80211_REASON_AUTH_EXPIRE); 2001 } 2002 ieee80211_node_leave(ni); 2003 ieee80211_free_node(ni); 2004 vap->iv_stats.is_node_timeout++; 2005 goto restart; 2006 } 2007 } 2008 IEEE80211_NODE_UNLOCK(nt); 2009 2010 IEEE80211_NODE_ITERATE_UNLOCK(nt); 2011} 2012 2013/* 2014 * Aggressively reclaim resources. This should be used 2015 * only in a critical situation to reclaim mbuf resources. 2016 */ 2017void 2018ieee80211_drain(struct ieee80211com *ic) 2019{ 2020 struct ieee80211_node_table *nt = &ic->ic_sta; 2021 struct ieee80211vap *vap; 2022 struct ieee80211_node *ni; 2023 2024 IEEE80211_NODE_LOCK(nt); 2025 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2026 /* 2027 * Ignore entries for which have yet to receive an 2028 * authentication frame. These are transient and 2029 * will be reclaimed when the last reference to them 2030 * goes away (when frame xmits complete). 2031 */ 2032 vap = ni->ni_vap; 2033 /* 2034 * Only process stations when in RUN state. This 2035 * insures, for example, that we don't timeout an 2036 * inactive station during CAC. Note that CSA state 2037 * is actually handled in ieee80211_node_timeout as 2038 * it applies to more than timeout processing. 2039 */ 2040 if (vap->iv_state != IEEE80211_S_RUN) 2041 continue; 2042 /* XXX can vap be NULL? */ 2043 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 2044 vap->iv_opmode == IEEE80211_M_STA) && 2045 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 2046 continue; 2047 /* 2048 * Free fragments. 2049 * XXX doesn't belong here, move to node_drain 2050 */ 2051 if (ni->ni_rxfrag[0] != NULL) { 2052 m_freem(ni->ni_rxfrag[0]); 2053 ni->ni_rxfrag[0] = NULL; 2054 } 2055 /* 2056 * Drain resources held by the station. 2057 */ 2058 ic->ic_node_drain(ni); 2059 } 2060 IEEE80211_NODE_UNLOCK(nt); 2061} 2062 2063/* 2064 * Per-ieee80211com inactivity timer callback. 2065 */ 2066void 2067ieee80211_node_timeout(void *arg) 2068{ 2069 struct ieee80211com *ic = arg; 2070 2071 /* 2072 * Defer timeout processing if a channel switch is pending. 2073 * We typically need to be mute so not doing things that 2074 * might generate frames is good to handle in one place. 2075 * Supressing the station timeout processing may extend the 2076 * lifetime of inactive stations (by not decrementing their 2077 * idle counters) but this should be ok unless the CSA is 2078 * active for an unusually long time. 2079 */ 2080 if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) { 2081 ieee80211_scan_timeout(ic); 2082 ieee80211_timeout_stations(ic); 2083 2084 IEEE80211_LOCK(ic); 2085 ieee80211_erp_timeout(ic); 2086 ieee80211_ht_timeout(ic); 2087 IEEE80211_UNLOCK(ic); 2088 } 2089 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, 2090 ieee80211_node_timeout, ic); 2091} 2092 2093void 2094ieee80211_iterate_nodes(struct ieee80211_node_table *nt, 2095 ieee80211_iter_func *f, void *arg) 2096{ 2097 struct ieee80211_node *ni; 2098 u_int gen; 2099 2100 IEEE80211_NODE_ITERATE_LOCK(nt); 2101 gen = ++nt->nt_scangen; 2102restart: 2103 IEEE80211_NODE_LOCK(nt); 2104 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2105 if (ni->ni_scangen != gen) { 2106 ni->ni_scangen = gen; 2107 (void) ieee80211_ref_node(ni); 2108 IEEE80211_NODE_UNLOCK(nt); 2109 (*f)(arg, ni); 2110 ieee80211_free_node(ni); 2111 goto restart; 2112 } 2113 } 2114 IEEE80211_NODE_UNLOCK(nt); 2115 2116 IEEE80211_NODE_ITERATE_UNLOCK(nt); 2117} 2118 2119void 2120ieee80211_dump_node(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 2121{ 2122 printf("0x%p: mac %s refcnt %d\n", ni, 2123 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)); 2124 printf("\tscangen %u authmode %u flags 0x%x\n", 2125 ni->ni_scangen, ni->ni_authmode, ni->ni_flags); 2126 printf("\tassocid 0x%x txpower %u vlan %u\n", 2127 ni->ni_associd, ni->ni_txpower, ni->ni_vlan); 2128 printf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n", 2129 ni->ni_txseqs[IEEE80211_NONQOS_TID], 2130 ni->ni_rxseqs[IEEE80211_NONQOS_TID] >> IEEE80211_SEQ_SEQ_SHIFT, 2131 ni->ni_rxseqs[IEEE80211_NONQOS_TID] & IEEE80211_SEQ_FRAG_MASK, 2132 ni->ni_rxfragstamp); 2133 printf("\trstamp %u rssi %d noise %d intval %u capinfo 0x%x\n", 2134 ni->ni_rstamp, node_getrssi(ni), ni->ni_noise, 2135 ni->ni_intval, ni->ni_capinfo); 2136 printf("\tbssid %s essid \"%.*s\" channel %u:0x%x\n", 2137 ether_sprintf(ni->ni_bssid), 2138 ni->ni_esslen, ni->ni_essid, 2139 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags); 2140 printf("\tinact %u inact_reload %u txrate %u\n", 2141 ni->ni_inact, ni->ni_inact_reload, ni->ni_txrate); 2142 printf("\thtcap %x htparam %x htctlchan %u ht2ndchan %u\n", 2143 ni->ni_htcap, ni->ni_htparam, 2144 ni->ni_htctlchan, ni->ni_ht2ndchan); 2145 printf("\thtopmode %x htstbc %x chw %u\n", 2146 ni->ni_htopmode, ni->ni_htstbc, ni->ni_chw); 2147} 2148 2149void 2150ieee80211_dump_nodes(struct ieee80211_node_table *nt) 2151{ 2152 ieee80211_iterate_nodes(nt, 2153 (ieee80211_iter_func *) ieee80211_dump_node, nt); 2154} 2155 2156static void 2157ieee80211_notify_erp_locked(struct ieee80211com *ic) 2158{ 2159 struct ieee80211vap *vap; 2160 2161 IEEE80211_LOCK_ASSERT(ic); 2162 2163 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 2164 if (vap->iv_opmode == IEEE80211_M_HOSTAP) 2165 ieee80211_beacon_notify(vap, IEEE80211_BEACON_ERP); 2166} 2167 2168void 2169ieee80211_notify_erp(struct ieee80211com *ic) 2170{ 2171 IEEE80211_LOCK(ic); 2172 ieee80211_notify_erp_locked(ic); 2173 IEEE80211_UNLOCK(ic); 2174} 2175 2176/* 2177 * Handle a station joining an 11g network. 2178 */ 2179static void 2180ieee80211_node_join_11g(struct ieee80211_node *ni) 2181{ 2182 struct ieee80211com *ic = ni->ni_ic; 2183 2184 IEEE80211_LOCK_ASSERT(ic); 2185 2186 /* 2187 * Station isn't capable of short slot time. Bump 2188 * the count of long slot time stations and disable 2189 * use of short slot time. Note that the actual switch 2190 * over to long slot time use may not occur until the 2191 * next beacon transmission (per sec. 7.3.1.4 of 11g). 2192 */ 2193 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2194 ic->ic_longslotsta++; 2195 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2196 "station needs long slot time, count %d", 2197 ic->ic_longslotsta); 2198 /* XXX vap's w/ conflicting needs won't work */ 2199 if (!IEEE80211_IS_CHAN_108G(ic->ic_bsschan)) { 2200 /* 2201 * Don't force slot time when switched to turbo 2202 * mode as non-ERP stations won't be present; this 2203 * need only be done when on the normal G channel. 2204 */ 2205 ieee80211_set_shortslottime(ic, 0); 2206 } 2207 } 2208 /* 2209 * If the new station is not an ERP station 2210 * then bump the counter and enable protection 2211 * if configured. 2212 */ 2213 if (!ieee80211_iserp_rateset(&ni->ni_rates)) { 2214 ic->ic_nonerpsta++; 2215 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2216 "station is !ERP, %d non-ERP stations associated", 2217 ic->ic_nonerpsta); 2218 /* 2219 * If station does not support short preamble 2220 * then we must enable use of Barker preamble. 2221 */ 2222 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) { 2223 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2224 "%s", "station needs long preamble"); 2225 ic->ic_flags |= IEEE80211_F_USEBARKER; 2226 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; 2227 } 2228 /* 2229 * If protection is configured and this is the first 2230 * indication we should use protection, enable it. 2231 */ 2232 if (ic->ic_protmode != IEEE80211_PROT_NONE && 2233 ic->ic_nonerpsta == 1 && 2234 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2235 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2236 "%s: enable use of protection\n", __func__); 2237 ic->ic_flags |= IEEE80211_F_USEPROT; 2238 ieee80211_notify_erp_locked(ic); 2239 } 2240 } else 2241 ni->ni_flags |= IEEE80211_NODE_ERP; 2242} 2243 2244void 2245ieee80211_node_join(struct ieee80211_node *ni, int resp) 2246{ 2247 struct ieee80211com *ic = ni->ni_ic; 2248 struct ieee80211vap *vap = ni->ni_vap; 2249 int newassoc; 2250 2251 if (ni->ni_associd == 0) { 2252 uint16_t aid; 2253 2254 KASSERT(vap->iv_aid_bitmap != NULL, ("no aid bitmap")); 2255 /* 2256 * It would be good to search the bitmap 2257 * more efficiently, but this will do for now. 2258 */ 2259 for (aid = 1; aid < vap->iv_max_aid; aid++) { 2260 if (!IEEE80211_AID_ISSET(vap, aid)) 2261 break; 2262 } 2263 if (aid >= vap->iv_max_aid) { 2264 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_TOOMANY); 2265 ieee80211_node_leave(ni); 2266 return; 2267 } 2268 ni->ni_associd = aid | 0xc000; 2269 ni->ni_jointime = time_uptime; 2270 IEEE80211_LOCK(ic); 2271 IEEE80211_AID_SET(vap, ni->ni_associd); 2272 vap->iv_sta_assoc++; 2273 ic->ic_sta_assoc++; 2274 2275 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2276 ieee80211_ht_node_join(ni); 2277 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2278 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2279 ieee80211_node_join_11g(ni); 2280 IEEE80211_UNLOCK(ic); 2281 2282 newassoc = 1; 2283 } else 2284 newassoc = 0; 2285 2286 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2287 "station associated at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s", 2288 IEEE80211_NODE_AID(ni), 2289 ic->ic_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long", 2290 ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long", 2291 ic->ic_flags & IEEE80211_F_USEPROT ? ", protection" : "", 2292 ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "", 2293 ni->ni_flags & IEEE80211_NODE_HT ? 2294 (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "", 2295 ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "", 2296 ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" : 2297 ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "", 2298 ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "", 2299 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ? 2300 ", fast-frames" : "", 2301 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ? 2302 ", turbo" : "" 2303 ); 2304 2305 node_setuptxparms(ni); 2306 /* give driver a chance to setup state like ni_txrate */ 2307 if (ic->ic_newassoc != NULL) 2308 ic->ic_newassoc(ni, newassoc); 2309 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_SUCCESS); 2310 /* tell the authenticator about new station */ 2311 if (vap->iv_auth->ia_node_join != NULL) 2312 vap->iv_auth->ia_node_join(ni); 2313 ieee80211_notify_node_join(ni, 2314 resp == IEEE80211_FC0_SUBTYPE_ASSOC_RESP); 2315} 2316 2317static void 2318disable_protection(struct ieee80211com *ic) 2319{ 2320 KASSERT(ic->ic_nonerpsta == 0 && 2321 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0, 2322 ("%d non ERP stations, flags 0x%x", ic->ic_nonerpsta, 2323 ic->ic_flags_ext)); 2324 2325 ic->ic_flags &= ~IEEE80211_F_USEPROT; 2326 /* XXX verify mode? */ 2327 if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) { 2328 ic->ic_flags |= IEEE80211_F_SHPREAMBLE; 2329 ic->ic_flags &= ~IEEE80211_F_USEBARKER; 2330 } 2331 ieee80211_notify_erp_locked(ic); 2332} 2333 2334/* 2335 * Handle a station leaving an 11g network. 2336 */ 2337static void 2338ieee80211_node_leave_11g(struct ieee80211_node *ni) 2339{ 2340 struct ieee80211com *ic = ni->ni_ic; 2341 2342 IEEE80211_LOCK_ASSERT(ic); 2343 2344 KASSERT(IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan), 2345 ("not in 11g, bss %u:0x%x", ic->ic_bsschan->ic_freq, 2346 ic->ic_bsschan->ic_flags)); 2347 2348 /* 2349 * If a long slot station do the slot time bookkeeping. 2350 */ 2351 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2352 KASSERT(ic->ic_longslotsta > 0, 2353 ("bogus long slot station count %d", ic->ic_longslotsta)); 2354 ic->ic_longslotsta--; 2355 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2356 "long slot time station leaves, count now %d", 2357 ic->ic_longslotsta); 2358 if (ic->ic_longslotsta == 0) { 2359 /* 2360 * Re-enable use of short slot time if supported 2361 * and not operating in IBSS mode (per spec). 2362 */ 2363 if ((ic->ic_caps & IEEE80211_C_SHSLOT) && 2364 ic->ic_opmode != IEEE80211_M_IBSS) { 2365 IEEE80211_DPRINTF(ni->ni_vap, 2366 IEEE80211_MSG_ASSOC, 2367 "%s: re-enable use of short slot time\n", 2368 __func__); 2369 ieee80211_set_shortslottime(ic, 1); 2370 } 2371 } 2372 } 2373 /* 2374 * If a non-ERP station do the protection-related bookkeeping. 2375 */ 2376 if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) { 2377 KASSERT(ic->ic_nonerpsta > 0, 2378 ("bogus non-ERP station count %d", ic->ic_nonerpsta)); 2379 ic->ic_nonerpsta--; 2380 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2381 "non-ERP station leaves, count now %d%s", ic->ic_nonerpsta, 2382 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) ? 2383 " (non-ERP sta present)" : ""); 2384 if (ic->ic_nonerpsta == 0 && 2385 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2386 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2387 "%s: disable use of protection\n", __func__); 2388 disable_protection(ic); 2389 } 2390 } 2391} 2392 2393/* 2394 * Time out presence of an overlapping bss with non-ERP 2395 * stations. When operating in hostap mode we listen for 2396 * beacons from other stations and if we identify a non-ERP 2397 * station is present we enable protection. To identify 2398 * when all non-ERP stations are gone we time out this 2399 * condition. 2400 */ 2401static void 2402ieee80211_erp_timeout(struct ieee80211com *ic) 2403{ 2404 2405 IEEE80211_LOCK_ASSERT(ic); 2406 2407 if ((ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) && 2408 time_after(ticks, ic->ic_lastnonerp + IEEE80211_NONERP_PRESENT_AGE)) { 2409#if 0 2410 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni, 2411 "%s", "age out non-ERP sta present on channel"); 2412#endif 2413 ic->ic_flags_ext &= ~IEEE80211_FEXT_NONERP_PR; 2414 if (ic->ic_nonerpsta == 0) 2415 disable_protection(ic); 2416 } 2417} 2418 2419/* 2420 * Handle bookkeeping for station deauthentication/disassociation 2421 * when operating as an ap. 2422 */ 2423void 2424ieee80211_node_leave(struct ieee80211_node *ni) 2425{ 2426 struct ieee80211com *ic = ni->ni_ic; 2427 struct ieee80211vap *vap = ni->ni_vap; 2428 struct ieee80211_node_table *nt = ni->ni_table; 2429 2430 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2431 "station with aid %d leaves", IEEE80211_NODE_AID(ni)); 2432 2433 KASSERT(vap->iv_opmode != IEEE80211_M_STA, 2434 ("unexpected operating mode %u", vap->iv_opmode)); 2435 /* 2436 * If node wasn't previously associated all 2437 * we need to do is reclaim the reference. 2438 */ 2439 /* XXX ibss mode bypasses 11g and notification */ 2440 if (ni->ni_associd == 0) 2441 goto done; 2442 /* 2443 * Tell the authenticator the station is leaving. 2444 * Note that we must do this before yanking the 2445 * association id as the authenticator uses the 2446 * associd to locate it's state block. 2447 */ 2448 if (vap->iv_auth->ia_node_leave != NULL) 2449 vap->iv_auth->ia_node_leave(ni); 2450 2451 IEEE80211_LOCK(ic); 2452 IEEE80211_AID_CLR(vap, ni->ni_associd); 2453 ni->ni_associd = 0; 2454 vap->iv_sta_assoc--; 2455 ic->ic_sta_assoc--; 2456 2457 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2458 ieee80211_ht_node_leave(ni); 2459 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2460 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2461 ieee80211_node_leave_11g(ni); 2462 IEEE80211_UNLOCK(ic); 2463 /* 2464 * Cleanup station state. In particular clear various 2465 * state that might otherwise be reused if the node 2466 * is reused before the reference count goes to zero 2467 * (and memory is reclaimed). 2468 */ 2469 ieee80211_sta_leave(ni); 2470done: 2471 /* 2472 * Remove the node from any table it's recorded in and 2473 * drop the caller's reference. Removal from the table 2474 * is important to insure the node is not reprocessed 2475 * for inactivity. 2476 */ 2477 if (nt != NULL) { 2478 IEEE80211_NODE_LOCK(nt); 2479 node_reclaim(nt, ni); 2480 IEEE80211_NODE_UNLOCK(nt); 2481 } else 2482 ieee80211_free_node(ni); 2483} 2484 2485struct rssiinfo { 2486 struct ieee80211vap *vap; 2487 int rssi_samples; 2488 uint32_t rssi_total; 2489}; 2490 2491static void 2492get_hostap_rssi(void *arg, struct ieee80211_node *ni) 2493{ 2494 struct rssiinfo *info = arg; 2495 struct ieee80211vap *vap = ni->ni_vap; 2496 int8_t rssi; 2497 2498 if (info->vap != vap) 2499 return; 2500 /* only associated stations */ 2501 if (ni->ni_associd == 0) 2502 return; 2503 rssi = vap->iv_ic->ic_node_getrssi(ni); 2504 if (rssi != 0) { 2505 info->rssi_samples++; 2506 info->rssi_total += rssi; 2507 } 2508} 2509 2510static void 2511get_adhoc_rssi(void *arg, struct ieee80211_node *ni) 2512{ 2513 struct rssiinfo *info = arg; 2514 struct ieee80211vap *vap = ni->ni_vap; 2515 int8_t rssi; 2516 2517 if (info->vap != vap) 2518 return; 2519 /* only neighbors */ 2520 /* XXX check bssid */ 2521 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 2522 return; 2523 rssi = vap->iv_ic->ic_node_getrssi(ni); 2524 if (rssi != 0) { 2525 info->rssi_samples++; 2526 info->rssi_total += rssi; 2527 } 2528} 2529 2530int8_t 2531ieee80211_getrssi(struct ieee80211vap *vap) 2532{ 2533#define NZ(x) ((x) == 0 ? 1 : (x)) 2534 struct ieee80211com *ic = vap->iv_ic; 2535 struct rssiinfo info; 2536 2537 info.rssi_total = 0; 2538 info.rssi_samples = 0; 2539 info.vap = vap; 2540 switch (vap->iv_opmode) { 2541 case IEEE80211_M_IBSS: /* average of all ibss neighbors */ 2542 case IEEE80211_M_AHDEMO: /* average of all neighbors */ 2543 ieee80211_iterate_nodes(&ic->ic_sta, get_adhoc_rssi, &info); 2544 break; 2545 case IEEE80211_M_HOSTAP: /* average of all associated stations */ 2546 ieee80211_iterate_nodes(&ic->ic_sta, get_hostap_rssi, &info); 2547 break; 2548 case IEEE80211_M_MONITOR: /* XXX */ 2549 case IEEE80211_M_STA: /* use stats from associated ap */ 2550 default: 2551 if (vap->iv_bss != NULL) 2552 info.rssi_total = ic->ic_node_getrssi(vap->iv_bss); 2553 info.rssi_samples = 1; 2554 break; 2555 } 2556 return info.rssi_total / NZ(info.rssi_samples); 2557#undef NZ 2558} 2559 2560void 2561ieee80211_getsignal(struct ieee80211vap *vap, int8_t *rssi, int8_t *noise) 2562{ 2563 2564 if (vap->iv_bss == NULL) /* NB: shouldn't happen */ 2565 return; 2566 vap->iv_ic->ic_node_getsignal(vap->iv_bss, rssi, noise); 2567 /* for non-station mode return avg'd rssi accounting */ 2568 if (vap->iv_opmode != IEEE80211_M_STA) 2569 *rssi = ieee80211_getrssi(vap); 2570} 2571