ieee80211_node.c revision 186870
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 186870 2009-01-07 18:17:36Z 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 if (vap->iv_opmode == IEEE80211_M_STA) { 736 /* NB: only infrastructure mode requires an associd */ 737 ni->ni_flags |= IEEE80211_NODE_ASSOCID; 738 } 739 740 if (ieee80211_ies_init(&ni->ni_ies, se->se_ies.data, se->se_ies.len)) { 741 ieee80211_ies_expand(&ni->ni_ies); 742 if (ni->ni_ies.ath_ie != NULL) 743 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 744 if (ni->ni_ies.htcap_ie != NULL) 745 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie); 746 if (ni->ni_ies.htinfo_ie != NULL) 747 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie); 748 } 749 750 vap->iv_dtim_period = se->se_dtimperiod; 751 vap->iv_dtim_count = 0; 752 753 /* NB: must be after ni_chan is setup */ 754 ieee80211_setup_rates(ni, se->se_rates, se->se_xrates, 755 IEEE80211_F_DOSORT); 756 if (ieee80211_iserp_rateset(&ni->ni_rates)) 757 ni->ni_flags |= IEEE80211_NODE_ERP; 758 node_setuptxparms(ni); 759 760 return ieee80211_sta_join1(ieee80211_ref_node(ni)); 761} 762 763/* 764 * Leave the specified IBSS/BSS network. The node is assumed to 765 * be passed in with a held reference. 766 */ 767void 768ieee80211_sta_leave(struct ieee80211_node *ni) 769{ 770 struct ieee80211com *ic = ni->ni_ic; 771 772 ic->ic_node_cleanup(ni); 773 ieee80211_notify_node_leave(ni); 774} 775 776/* 777 * Send a deauthenticate frame and drop the station. 778 */ 779void 780ieee80211_node_deauth(struct ieee80211_node *ni, int reason) 781{ 782 /* NB: bump the refcnt to be sure temporay nodes are not reclaimed */ 783 ieee80211_ref_node(ni); 784 if (ni->ni_associd != 0) 785 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH, reason); 786 ieee80211_node_leave(ni); 787 ieee80211_free_node(ni); 788} 789 790static struct ieee80211_node * 791node_alloc(struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 792{ 793 struct ieee80211_node *ni; 794 795 ni = (struct ieee80211_node *) malloc(sizeof(struct ieee80211_node), 796 M_80211_NODE, M_NOWAIT | M_ZERO); 797 return ni; 798} 799 800/* 801 * Initialize an ie blob with the specified data. If previous 802 * data exists re-use the data block. As a side effect we clear 803 * all references to specific ie's; the caller is required to 804 * recalculate them. 805 */ 806int 807ieee80211_ies_init(struct ieee80211_ies *ies, const uint8_t *data, int len) 808{ 809 /* NB: assumes data+len are the last fields */ 810 memset(ies, 0, offsetof(struct ieee80211_ies, data)); 811 if (ies->data != NULL && ies->len != len) { 812 /* data size changed */ 813 free(ies->data, M_80211_NODE_IE); 814 ies->data = NULL; 815 } 816 if (ies->data == NULL) { 817 ies->data = (uint8_t *) malloc(len, M_80211_NODE_IE, M_NOWAIT); 818 if (ies->data == NULL) { 819 ies->len = 0; 820 /* NB: pointers have already been zero'd above */ 821 return 0; 822 } 823 } 824 memcpy(ies->data, data, len); 825 ies->len = len; 826 return 1; 827} 828 829/* 830 * Reclaim storage for an ie blob. 831 */ 832void 833ieee80211_ies_cleanup(struct ieee80211_ies *ies) 834{ 835 if (ies->data != NULL) 836 free(ies->data, M_80211_NODE_IE); 837} 838 839/* 840 * Expand an ie blob data contents and to fillin individual 841 * ie pointers. The data blob is assumed to be well-formed; 842 * we don't do any validity checking of ie lengths. 843 */ 844void 845ieee80211_ies_expand(struct ieee80211_ies *ies) 846{ 847 uint8_t *ie; 848 int ielen; 849 850 ie = ies->data; 851 ielen = ies->len; 852 while (ielen > 0) { 853 switch (ie[0]) { 854 case IEEE80211_ELEMID_VENDOR: 855 if (iswpaoui(ie)) 856 ies->wpa_ie = ie; 857 else if (iswmeoui(ie)) 858 ies->wme_ie = ie; 859 else if (isatherosoui(ie)) 860 ies->ath_ie = ie; 861 break; 862 case IEEE80211_ELEMID_RSN: 863 ies->rsn_ie = ie; 864 break; 865 case IEEE80211_ELEMID_HTCAP: 866 ies->htcap_ie = ie; 867 break; 868 } 869 ielen -= 2 + ie[1]; 870 ie += 2 + ie[1]; 871 } 872} 873 874/* 875 * Reclaim any resources in a node and reset any critical 876 * state. Typically nodes are free'd immediately after, 877 * but in some cases the storage may be reused so we need 878 * to insure consistent state (should probably fix that). 879 */ 880static void 881node_cleanup(struct ieee80211_node *ni) 882{ 883#define N(a) (sizeof(a)/sizeof(a[0])) 884 struct ieee80211vap *vap = ni->ni_vap; 885 int i; 886 887 /* NB: preserve ni_table */ 888 if (ni->ni_flags & IEEE80211_NODE_PWR_MGT) { 889 if (vap->iv_opmode != IEEE80211_M_STA) 890 vap->iv_ps_sta--; 891 ni->ni_flags &= ~IEEE80211_NODE_PWR_MGT; 892 IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni, 893 "power save mode off, %u sta's in ps mode", vap->iv_ps_sta); 894 } 895 /* 896 * Cleanup any HT-related state. 897 */ 898 if (ni->ni_flags & IEEE80211_NODE_HT) 899 ieee80211_ht_node_cleanup(ni); 900 /* 901 * Clear AREF flag that marks the authorization refcnt bump 902 * has happened. This is probably not needed as the node 903 * should always be removed from the table so not found but 904 * do it just in case. 905 * Likewise clear the ASSOCID flag as these flags are intended 906 * to be managed in tandem. 907 */ 908 ni->ni_flags &= ~(IEEE80211_NODE_AREF | IEEE80211_NODE_ASSOCID); 909 910 /* 911 * Drain power save queue and, if needed, clear TIM. 912 */ 913 if (ieee80211_node_psq_drain(ni) != 0 && vap->iv_set_tim != NULL) 914 vap->iv_set_tim(ni, 0); 915 916 ni->ni_associd = 0; 917 if (ni->ni_challenge != NULL) { 918 free(ni->ni_challenge, M_80211_NODE); 919 ni->ni_challenge = NULL; 920 } 921 /* 922 * Preserve SSID, WPA, and WME ie's so the bss node is 923 * reusable during a re-auth/re-assoc state transition. 924 * If we remove these data they will not be recreated 925 * because they come from a probe-response or beacon frame 926 * which cannot be expected prior to the association-response. 927 * This should not be an issue when operating in other modes 928 * as stations leaving always go through a full state transition 929 * which will rebuild this state. 930 * 931 * XXX does this leave us open to inheriting old state? 932 */ 933 for (i = 0; i < N(ni->ni_rxfrag); i++) 934 if (ni->ni_rxfrag[i] != NULL) { 935 m_freem(ni->ni_rxfrag[i]); 936 ni->ni_rxfrag[i] = NULL; 937 } 938 /* 939 * Must be careful here to remove any key map entry w/o a LOR. 940 */ 941 ieee80211_node_delucastkey(ni); 942#undef N 943} 944 945static void 946node_free(struct ieee80211_node *ni) 947{ 948 struct ieee80211com *ic = ni->ni_ic; 949 950 ic->ic_node_cleanup(ni); 951 ieee80211_ies_cleanup(&ni->ni_ies); 952 ieee80211_psq_cleanup(&ni->ni_psq); 953 IEEE80211_NODE_WDSQ_DESTROY(ni); 954 free(ni, M_80211_NODE); 955} 956 957static void 958node_age(struct ieee80211_node *ni) 959{ 960 struct ieee80211vap *vap = ni->ni_vap; 961 962 IEEE80211_NODE_LOCK_ASSERT(&vap->iv_ic->ic_sta); 963 964 /* 965 * Age frames on the power save queue. 966 */ 967 if (ieee80211_node_psq_age(ni) != 0 && 968 ni->ni_psq.psq_len == 0 && vap->iv_set_tim != NULL) 969 vap->iv_set_tim(ni, 0); 970 /* 971 * Age frames on the wds pending queue. 972 */ 973 if (IEEE80211_NODE_WDSQ_QLEN(ni) != 0) 974 ieee80211_node_wdsq_age(ni); 975 /* 976 * Age out HT resources (e.g. frames on the 977 * A-MPDU reorder queues). 978 */ 979 if (ni->ni_associd != 0 && (ni->ni_flags & IEEE80211_NODE_HT)) 980 ieee80211_ht_node_age(ni); 981} 982 983static int8_t 984node_getrssi(const struct ieee80211_node *ni) 985{ 986 uint32_t avgrssi = ni->ni_avgrssi; 987 int32_t rssi; 988 989 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) 990 return 0; 991 rssi = IEEE80211_RSSI_GET(avgrssi); 992 return rssi < 0 ? 0 : rssi > 127 ? 127 : rssi; 993} 994 995static void 996node_getsignal(const struct ieee80211_node *ni, int8_t *rssi, int8_t *noise) 997{ 998 *rssi = node_getrssi(ni); 999 *noise = ni->ni_noise; 1000} 1001 1002static void 1003node_getmimoinfo(const struct ieee80211_node *ni, 1004 struct ieee80211_mimo_info *info) 1005{ 1006 /* XXX zero data? */ 1007} 1008 1009struct ieee80211_node * 1010ieee80211_alloc_node(struct ieee80211_node_table *nt, 1011 struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1012{ 1013 struct ieee80211com *ic = nt->nt_ic; 1014 struct ieee80211_node *ni; 1015 int hash; 1016 1017 ni = ic->ic_node_alloc(vap, macaddr); 1018 if (ni == NULL) { 1019 vap->iv_stats.is_rx_nodealloc++; 1020 return NULL; 1021 } 1022 1023 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1024 "%s %p<%s> in %s table\n", __func__, ni, 1025 ether_sprintf(macaddr), nt->nt_name); 1026 1027 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1028 hash = IEEE80211_NODE_HASH(macaddr); 1029 ieee80211_node_initref(ni); /* mark referenced */ 1030 ni->ni_chan = IEEE80211_CHAN_ANYC; 1031 ni->ni_authmode = IEEE80211_AUTH_OPEN; 1032 ni->ni_txpower = ic->ic_txpowlimit; /* max power */ 1033 ni->ni_txparms = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)]; 1034 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE); 1035 ni->ni_avgrssi = IEEE80211_RSSI_DUMMY_MARKER; 1036 ni->ni_inact_reload = nt->nt_inact_init; 1037 ni->ni_inact = ni->ni_inact_reload; 1038 ni->ni_ath_defkeyix = 0x7fff; 1039 ieee80211_psq_init(&ni->ni_psq, "unknown"); 1040 IEEE80211_NODE_WDSQ_INIT(ni, "unknown"); 1041 1042 IEEE80211_NODE_LOCK(nt); 1043 TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list); 1044 LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash); 1045 ni->ni_table = nt; 1046 ni->ni_vap = vap; 1047 ni->ni_ic = ic; 1048 IEEE80211_NODE_UNLOCK(nt); 1049 1050 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 1051 "%s: inact_reload %u", __func__, ni->ni_inact_reload); 1052 1053 return ni; 1054} 1055 1056/* 1057 * Craft a temporary node suitable for sending a management frame 1058 * to the specified station. We craft only as much state as we 1059 * need to do the work since the node will be immediately reclaimed 1060 * once the send completes. 1061 */ 1062struct ieee80211_node * 1063ieee80211_tmp_node(struct ieee80211vap *vap, 1064 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1065{ 1066 struct ieee80211com *ic = vap->iv_ic; 1067 struct ieee80211_node *ni; 1068 1069 ni = ic->ic_node_alloc(vap, macaddr); 1070 if (ni != NULL) { 1071 struct ieee80211_node *bss = vap->iv_bss; 1072 1073 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1074 "%s %p<%s>\n", __func__, ni, ether_sprintf(macaddr)); 1075 1076 ni->ni_table = NULL; /* NB: pedantic */ 1077 ni->ni_ic = ic; /* NB: needed to set channel */ 1078 ni->ni_vap = vap; 1079 1080 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1081 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1082 ieee80211_node_initref(ni); /* mark referenced */ 1083 /* NB: required by ieee80211_fix_rate */ 1084 ieee80211_node_set_chan(ni, bss->ni_chan); 1085 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, 1086 IEEE80211_KEYIX_NONE); 1087 ni->ni_txpower = bss->ni_txpower; 1088 /* XXX optimize away */ 1089 ieee80211_psq_init(&ni->ni_psq, "unknown"); 1090 IEEE80211_NODE_WDSQ_INIT(ni, "unknown"); 1091 } else { 1092 /* XXX msg */ 1093 vap->iv_stats.is_rx_nodealloc++; 1094 } 1095 return ni; 1096} 1097 1098struct ieee80211_node * 1099ieee80211_dup_bss(struct ieee80211vap *vap, 1100 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1101{ 1102 struct ieee80211com *ic = vap->iv_ic; 1103 struct ieee80211_node *ni; 1104 1105 ni = ieee80211_alloc_node(&ic->ic_sta, vap, macaddr); 1106 if (ni != NULL) { 1107 struct ieee80211_node *bss = vap->iv_bss; 1108 /* 1109 * Inherit from iv_bss. 1110 */ 1111 copy_bss(ni, bss); 1112 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1113 ieee80211_node_set_chan(ni, bss->ni_chan); 1114 } 1115 return ni; 1116} 1117 1118/* 1119 * Create a bss node for a legacy WDS vap. The far end does 1120 * not associate so we just create create a new node and 1121 * simulate an association. The caller is responsible for 1122 * installing the node as the bss node and handling any further 1123 * setup work like authorizing the port. 1124 */ 1125struct ieee80211_node * 1126ieee80211_node_create_wds(struct ieee80211vap *vap, 1127 const uint8_t bssid[IEEE80211_ADDR_LEN], struct ieee80211_channel *chan) 1128{ 1129 struct ieee80211com *ic = vap->iv_ic; 1130 struct ieee80211_node *ni; 1131 1132 /* XXX check if node already in sta table? */ 1133 ni = ieee80211_alloc_node(&ic->ic_sta, vap, bssid); 1134 if (ni != NULL) { 1135 ni->ni_wdsvap = vap; 1136 IEEE80211_ADDR_COPY(ni->ni_bssid, bssid); 1137 /* 1138 * Inherit any manually configured settings. 1139 */ 1140 copy_bss(ni, vap->iv_bss); 1141 ieee80211_node_set_chan(ni, chan); 1142 /* NB: propagate ssid so available to WPA supplicant */ 1143 ni->ni_esslen = vap->iv_des_ssid[0].len; 1144 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen); 1145 /* NB: no associd for peer */ 1146 /* 1147 * There are no management frames to use to 1148 * discover neighbor capabilities, so blindly 1149 * propagate the local configuration. 1150 */ 1151 if (vap->iv_flags & IEEE80211_F_WME) 1152 ni->ni_flags |= IEEE80211_NODE_QOS; 1153 if (vap->iv_flags & IEEE80211_F_FF) 1154 ni->ni_flags |= IEEE80211_NODE_FF; 1155 if ((ic->ic_htcaps & IEEE80211_HTC_HT) && 1156 (vap->iv_flags_ext & IEEE80211_FEXT_HT)) { 1157 /* 1158 * Device is HT-capable and HT is enabled for 1159 * the vap; setup HT operation. On return 1160 * ni_chan will be adjusted to an HT channel. 1161 */ 1162 ieee80211_ht_wds_init(ni); 1163 } else { 1164 struct ieee80211_channel *c = ni->ni_chan; 1165 /* 1166 * Force a legacy channel to be used. 1167 */ 1168 c = ieee80211_find_channel(ic, 1169 c->ic_freq, c->ic_flags &~ IEEE80211_CHAN_HT); 1170 KASSERT(c != NULL, ("no legacy channel, %u/%x", 1171 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags)); 1172 ni->ni_chan = c; 1173 } 1174 } 1175 return ni; 1176} 1177 1178struct ieee80211_node * 1179#ifdef IEEE80211_DEBUG_REFCNT 1180ieee80211_find_node_locked_debug(struct ieee80211_node_table *nt, 1181 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1182#else 1183ieee80211_find_node_locked(struct ieee80211_node_table *nt, 1184 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1185#endif 1186{ 1187 struct ieee80211_node *ni; 1188 int hash; 1189 1190 IEEE80211_NODE_LOCK_ASSERT(nt); 1191 1192 hash = IEEE80211_NODE_HASH(macaddr); 1193 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1194 if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1195 ieee80211_ref_node(ni); /* mark referenced */ 1196#ifdef IEEE80211_DEBUG_REFCNT 1197 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1198 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1199 func, line, 1200 ni, ether_sprintf(ni->ni_macaddr), 1201 ieee80211_node_refcnt(ni)); 1202#endif 1203 return ni; 1204 } 1205 } 1206 return NULL; 1207} 1208 1209struct ieee80211_node * 1210#ifdef IEEE80211_DEBUG_REFCNT 1211ieee80211_find_node_debug(struct ieee80211_node_table *nt, 1212 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1213#else 1214ieee80211_find_node(struct ieee80211_node_table *nt, 1215 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1216#endif 1217{ 1218 struct ieee80211_node *ni; 1219 1220 IEEE80211_NODE_LOCK(nt); 1221 ni = ieee80211_find_node_locked(nt, macaddr); 1222 IEEE80211_NODE_UNLOCK(nt); 1223 return ni; 1224} 1225 1226struct ieee80211_node * 1227#ifdef IEEE80211_DEBUG_REFCNT 1228ieee80211_find_vap_node_locked_debug(struct ieee80211_node_table *nt, 1229 const struct ieee80211vap *vap, 1230 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1231#else 1232ieee80211_find_vap_node_locked(struct ieee80211_node_table *nt, 1233 const struct ieee80211vap *vap, 1234 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1235#endif 1236{ 1237 struct ieee80211_node *ni; 1238 int hash; 1239 1240 IEEE80211_NODE_LOCK_ASSERT(nt); 1241 1242 hash = IEEE80211_NODE_HASH(macaddr); 1243 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1244 if (ni->ni_vap == vap && 1245 IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1246 ieee80211_ref_node(ni); /* mark referenced */ 1247#ifdef IEEE80211_DEBUG_REFCNT 1248 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1249 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1250 func, line, 1251 ni, ether_sprintf(ni->ni_macaddr), 1252 ieee80211_node_refcnt(ni)); 1253#endif 1254 return ni; 1255 } 1256 } 1257 return NULL; 1258} 1259 1260struct ieee80211_node * 1261#ifdef IEEE80211_DEBUG_REFCNT 1262ieee80211_find_vap_node_debug(struct ieee80211_node_table *nt, 1263 const struct ieee80211vap *vap, 1264 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1265#else 1266ieee80211_find_vap_node(struct ieee80211_node_table *nt, 1267 const struct ieee80211vap *vap, 1268 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1269#endif 1270{ 1271 struct ieee80211_node *ni; 1272 1273 IEEE80211_NODE_LOCK(nt); 1274 ni = ieee80211_find_vap_node_locked(nt, vap, macaddr); 1275 IEEE80211_NODE_UNLOCK(nt); 1276 return ni; 1277} 1278 1279/* 1280 * Fake up a node; this handles node discovery in adhoc mode. 1281 * Note that for the driver's benefit we we treat this like 1282 * an association so the driver has an opportunity to setup 1283 * it's private state. 1284 */ 1285struct ieee80211_node * 1286ieee80211_fakeup_adhoc_node(struct ieee80211vap *vap, 1287 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1288{ 1289 struct ieee80211_node *ni; 1290 1291 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1292 "%s: mac<%s>\n", __func__, ether_sprintf(macaddr)); 1293 ni = ieee80211_dup_bss(vap, macaddr); 1294 if (ni != NULL) { 1295 struct ieee80211com *ic = vap->iv_ic; 1296 1297 /* XXX no rate negotiation; just dup */ 1298 ni->ni_rates = vap->iv_bss->ni_rates; 1299 if (vap->iv_opmode == IEEE80211_M_AHDEMO) { 1300 /* 1301 * In adhoc demo mode there are no management 1302 * frames to use to discover neighbor capabilities, 1303 * so blindly propagate the local configuration 1304 * so we can do interesting things (e.g. use 1305 * WME to disable ACK's). 1306 */ 1307 if (vap->iv_flags & IEEE80211_F_WME) 1308 ni->ni_flags |= IEEE80211_NODE_QOS; 1309 if (vap->iv_flags & IEEE80211_F_FF) 1310 ni->ni_flags |= IEEE80211_NODE_FF; 1311 } 1312 node_setuptxparms(ni); 1313 if (ic->ic_newassoc != NULL) 1314 ic->ic_newassoc(ni, 1); 1315 /* XXX not right for 802.1x/WPA */ 1316 ieee80211_node_authorize(ni); 1317 } 1318 return ni; 1319} 1320 1321void 1322ieee80211_init_neighbor(struct ieee80211_node *ni, 1323 const struct ieee80211_frame *wh, 1324 const struct ieee80211_scanparams *sp) 1325{ 1326 ni->ni_esslen = sp->ssid[1]; 1327 memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]); 1328 IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3); 1329 memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp)); 1330 ni->ni_intval = sp->bintval; 1331 ni->ni_capinfo = sp->capinfo; 1332 ni->ni_chan = ni->ni_ic->ic_curchan; 1333 ni->ni_fhdwell = sp->fhdwell; 1334 ni->ni_fhindex = sp->fhindex; 1335 ni->ni_erp = sp->erp; 1336 ni->ni_timoff = sp->timoff; 1337 1338 if (ieee80211_ies_init(&ni->ni_ies, sp->ies, sp->ies_len)) { 1339 ieee80211_ies_expand(&ni->ni_ies); 1340 if (ni->ni_ies.wme_ie != NULL) 1341 ni->ni_flags |= IEEE80211_NODE_QOS; 1342 else 1343 ni->ni_flags &= ~IEEE80211_NODE_QOS; 1344 if (ni->ni_ies.ath_ie != NULL) 1345 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 1346 } 1347 1348 /* NB: must be after ni_chan is setup */ 1349 ieee80211_setup_rates(ni, sp->rates, sp->xrates, 1350 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 1351 IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 1352} 1353 1354/* 1355 * Do node discovery in adhoc mode on receipt of a beacon 1356 * or probe response frame. Note that for the driver's 1357 * benefit we we treat this like an association so the 1358 * driver has an opportunity to setup it's private state. 1359 */ 1360struct ieee80211_node * 1361ieee80211_add_neighbor(struct ieee80211vap *vap, 1362 const struct ieee80211_frame *wh, 1363 const struct ieee80211_scanparams *sp) 1364{ 1365 struct ieee80211_node *ni; 1366 1367 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1368 "%s: mac<%s>\n", __func__, ether_sprintf(wh->i_addr2)); 1369 ni = ieee80211_dup_bss(vap, wh->i_addr2);/* XXX alloc_node? */ 1370 if (ni != NULL) { 1371 struct ieee80211com *ic = vap->iv_ic; 1372 1373 ieee80211_init_neighbor(ni, wh, sp); 1374 node_setuptxparms(ni); 1375 if (ic->ic_newassoc != NULL) 1376 ic->ic_newassoc(ni, 1); 1377 /* XXX not right for 802.1x/WPA */ 1378 ieee80211_node_authorize(ni); 1379 } 1380 return ni; 1381} 1382 1383#define IS_CTL(wh) \ 1384 ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) == IEEE80211_FC0_TYPE_CTL) 1385#define IS_PSPOLL(wh) \ 1386 ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == IEEE80211_FC0_SUBTYPE_PS_POLL) 1387#define IS_BAR(wh) \ 1388 ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == IEEE80211_FC0_SUBTYPE_BAR) 1389#define IS_PROBEREQ(wh) \ 1390 ((wh->i_fc[0] & (IEEE80211_FC0_TYPE_MASK|IEEE80211_FC0_SUBTYPE_MASK)) \ 1391 == (IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ)) 1392#define IS_BCAST_PROBEREQ(wh) \ 1393 (IS_PROBEREQ(wh) && IEEE80211_IS_MULTICAST( \ 1394 ((const struct ieee80211_frame *)(wh))->i_addr3)) 1395 1396static __inline struct ieee80211_node * 1397_find_rxnode(struct ieee80211_node_table *nt, 1398 const struct ieee80211_frame_min *wh) 1399{ 1400 /* XXX 4-address frames? */ 1401 if (IS_CTL(wh) && !IS_PSPOLL(wh) && !IS_BAR(wh) /*&& !IS_RTS(ah)*/) 1402 return ieee80211_find_node_locked(nt, wh->i_addr1); 1403 if (IS_BCAST_PROBEREQ(wh)) 1404 return NULL; /* spam bcast probe req to all vap's */ 1405 return ieee80211_find_node_locked(nt, wh->i_addr2); 1406} 1407 1408/* 1409 * Locate the node for sender, track state, and then pass the 1410 * (referenced) node up to the 802.11 layer for its use. Note 1411 * we can return NULL if the sender is not in the table. 1412 */ 1413struct ieee80211_node * 1414#ifdef IEEE80211_DEBUG_REFCNT 1415ieee80211_find_rxnode_debug(struct ieee80211com *ic, 1416 const struct ieee80211_frame_min *wh, const char *func, int line) 1417#else 1418ieee80211_find_rxnode(struct ieee80211com *ic, 1419 const struct ieee80211_frame_min *wh) 1420#endif 1421{ 1422 struct ieee80211_node_table *nt; 1423 struct ieee80211_node *ni; 1424 1425 nt = &ic->ic_sta; 1426 IEEE80211_NODE_LOCK(nt); 1427 ni = _find_rxnode(nt, wh); 1428 IEEE80211_NODE_UNLOCK(nt); 1429 1430 return ni; 1431} 1432 1433/* 1434 * Like ieee80211_find_rxnode but use the supplied h/w 1435 * key index as a hint to locate the node in the key 1436 * mapping table. If an entry is present at the key 1437 * index we return it; otherwise do a normal lookup and 1438 * update the mapping table if the station has a unicast 1439 * key assigned to it. 1440 */ 1441struct ieee80211_node * 1442#ifdef IEEE80211_DEBUG_REFCNT 1443ieee80211_find_rxnode_withkey_debug(struct ieee80211com *ic, 1444 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix, 1445 const char *func, int line) 1446#else 1447ieee80211_find_rxnode_withkey(struct ieee80211com *ic, 1448 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix) 1449#endif 1450{ 1451 struct ieee80211_node_table *nt; 1452 struct ieee80211_node *ni; 1453 1454 nt = &ic->ic_sta; 1455 IEEE80211_NODE_LOCK(nt); 1456 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) 1457 ni = nt->nt_keyixmap[keyix]; 1458 else 1459 ni = NULL; 1460 if (ni == NULL) { 1461 ni = _find_rxnode(nt, wh); 1462 if (ni != NULL && nt->nt_keyixmap != NULL) { 1463 /* 1464 * If the station has a unicast key cache slot 1465 * assigned update the key->node mapping table. 1466 */ 1467 keyix = ni->ni_ucastkey.wk_rxkeyix; 1468 /* XXX can keyixmap[keyix] != NULL? */ 1469 if (keyix < nt->nt_keyixmax && 1470 nt->nt_keyixmap[keyix] == NULL) { 1471 IEEE80211_DPRINTF(ni->ni_vap, 1472 IEEE80211_MSG_NODE, 1473 "%s: add key map entry %p<%s> refcnt %d\n", 1474 __func__, ni, ether_sprintf(ni->ni_macaddr), 1475 ieee80211_node_refcnt(ni)+1); 1476 nt->nt_keyixmap[keyix] = ieee80211_ref_node(ni); 1477 } 1478 } 1479 } else { 1480 if (IS_BCAST_PROBEREQ(wh)) 1481 ni = NULL; /* spam bcast probe req to all vap's */ 1482 else 1483 ieee80211_ref_node(ni); 1484 } 1485 IEEE80211_NODE_UNLOCK(nt); 1486 1487 return ni; 1488} 1489#undef IS_BCAST_PROBEREQ 1490#undef IS_PROBEREQ 1491#undef IS_BAR 1492#undef IS_PSPOLL 1493#undef IS_CTL 1494 1495/* 1496 * Return a reference to the appropriate node for sending 1497 * a data frame. This handles node discovery in adhoc networks. 1498 */ 1499struct ieee80211_node * 1500#ifdef IEEE80211_DEBUG_REFCNT 1501ieee80211_find_txnode_debug(struct ieee80211vap *vap, 1502 const uint8_t macaddr[IEEE80211_ADDR_LEN], 1503 const char *func, int line) 1504#else 1505ieee80211_find_txnode(struct ieee80211vap *vap, 1506 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1507#endif 1508{ 1509 struct ieee80211_node_table *nt = &vap->iv_ic->ic_sta; 1510 struct ieee80211_node *ni; 1511 1512 /* 1513 * The destination address should be in the node table 1514 * unless this is a multicast/broadcast frame. We can 1515 * also optimize station mode operation, all frames go 1516 * to the bss node. 1517 */ 1518 /* XXX can't hold lock across dup_bss 'cuz of recursive locking */ 1519 IEEE80211_NODE_LOCK(nt); 1520 if (vap->iv_opmode == IEEE80211_M_STA || 1521 vap->iv_opmode == IEEE80211_M_WDS || 1522 IEEE80211_IS_MULTICAST(macaddr)) 1523 ni = ieee80211_ref_node(vap->iv_bss); 1524 else 1525 ni = ieee80211_find_node_locked(nt, macaddr); 1526 IEEE80211_NODE_UNLOCK(nt); 1527 1528 if (ni == NULL) { 1529 if (vap->iv_opmode == IEEE80211_M_IBSS || 1530 vap->iv_opmode == IEEE80211_M_AHDEMO) { 1531 /* 1532 * In adhoc mode cons up a node for the destination. 1533 * Note that we need an additional reference for the 1534 * caller to be consistent with 1535 * ieee80211_find_node_locked. 1536 */ 1537 ni = ieee80211_fakeup_adhoc_node(vap, macaddr); 1538 if (ni != NULL) 1539 (void) ieee80211_ref_node(ni); 1540 } else { 1541 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, macaddr, 1542 "no node, discard frame (%s)", __func__); 1543 vap->iv_stats.is_tx_nonode++; 1544 } 1545 } 1546 return ni; 1547} 1548 1549static void 1550_ieee80211_free_node(struct ieee80211_node *ni) 1551{ 1552 struct ieee80211_node_table *nt = ni->ni_table; 1553 1554 /* 1555 * NB: careful about referencing the vap as it may be 1556 * gone if the last reference was held by a driver. 1557 * We know the com will always be present so it's safe 1558 * to use ni_ic below to reclaim resources. 1559 */ 1560#if 0 1561 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1562 "%s %p<%s> in %s table\n", __func__, ni, 1563 ether_sprintf(ni->ni_macaddr), 1564 nt != NULL ? nt->nt_name : "<gone>"); 1565#endif 1566 if (ni->ni_associd != 0) { 1567 struct ieee80211vap *vap = ni->ni_vap; 1568 if (vap->iv_aid_bitmap != NULL) 1569 IEEE80211_AID_CLR(vap, ni->ni_associd); 1570 } 1571 if (nt != NULL) { 1572 TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1573 LIST_REMOVE(ni, ni_hash); 1574 } 1575 ni->ni_ic->ic_node_free(ni); 1576} 1577 1578void 1579#ifdef IEEE80211_DEBUG_REFCNT 1580ieee80211_free_node_debug(struct ieee80211_node *ni, const char *func, int line) 1581#else 1582ieee80211_free_node(struct ieee80211_node *ni) 1583#endif 1584{ 1585 struct ieee80211_node_table *nt = ni->ni_table; 1586 1587#ifdef IEEE80211_DEBUG_REFCNT 1588 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1589 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni, 1590 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1); 1591#endif 1592 if (nt != NULL) { 1593 IEEE80211_NODE_LOCK(nt); 1594 if (ieee80211_node_dectestref(ni)) { 1595 /* 1596 * Last reference, reclaim state. 1597 */ 1598 _ieee80211_free_node(ni); 1599 } else if (ieee80211_node_refcnt(ni) == 1 && 1600 nt->nt_keyixmap != NULL) { 1601 ieee80211_keyix keyix; 1602 /* 1603 * Check for a last reference in the key mapping table. 1604 */ 1605 keyix = ni->ni_ucastkey.wk_rxkeyix; 1606 if (keyix < nt->nt_keyixmax && 1607 nt->nt_keyixmap[keyix] == ni) { 1608 IEEE80211_DPRINTF(ni->ni_vap, 1609 IEEE80211_MSG_NODE, 1610 "%s: %p<%s> clear key map entry", __func__, 1611 ni, ether_sprintf(ni->ni_macaddr)); 1612 nt->nt_keyixmap[keyix] = NULL; 1613 ieee80211_node_decref(ni); /* XXX needed? */ 1614 _ieee80211_free_node(ni); 1615 } 1616 } 1617 IEEE80211_NODE_UNLOCK(nt); 1618 } else { 1619 if (ieee80211_node_dectestref(ni)) 1620 _ieee80211_free_node(ni); 1621 } 1622} 1623 1624/* 1625 * Reclaim a unicast key and clear any key cache state. 1626 */ 1627int 1628ieee80211_node_delucastkey(struct ieee80211_node *ni) 1629{ 1630 struct ieee80211com *ic = ni->ni_ic; 1631 struct ieee80211_node_table *nt = &ic->ic_sta; 1632 struct ieee80211_node *nikey; 1633 ieee80211_keyix keyix; 1634 int isowned, status; 1635 1636 /* 1637 * NB: We must beware of LOR here; deleting the key 1638 * can cause the crypto layer to block traffic updates 1639 * which can generate a LOR against the node table lock; 1640 * grab it here and stash the key index for our use below. 1641 * 1642 * Must also beware of recursion on the node table lock. 1643 * When called from node_cleanup we may already have 1644 * the node table lock held. Unfortunately there's no 1645 * way to separate out this path so we must do this 1646 * conditionally. 1647 */ 1648 isowned = IEEE80211_NODE_IS_LOCKED(nt); 1649 if (!isowned) 1650 IEEE80211_NODE_LOCK(nt); 1651 nikey = NULL; 1652 status = 1; /* NB: success */ 1653 if (ni->ni_ucastkey.wk_keyix != IEEE80211_KEYIX_NONE) { 1654 keyix = ni->ni_ucastkey.wk_rxkeyix; 1655 status = ieee80211_crypto_delkey(ni->ni_vap, &ni->ni_ucastkey); 1656 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) { 1657 nikey = nt->nt_keyixmap[keyix]; 1658 nt->nt_keyixmap[keyix] = NULL;; 1659 } 1660 } 1661 if (!isowned) 1662 IEEE80211_NODE_UNLOCK(nt); 1663 1664 if (nikey != NULL) { 1665 KASSERT(nikey == ni, 1666 ("key map out of sync, ni %p nikey %p", ni, nikey)); 1667 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1668 "%s: delete key map entry %p<%s> refcnt %d\n", 1669 __func__, ni, ether_sprintf(ni->ni_macaddr), 1670 ieee80211_node_refcnt(ni)-1); 1671 ieee80211_free_node(ni); 1672 } 1673 return status; 1674} 1675 1676/* 1677 * Reclaim a node. If this is the last reference count then 1678 * do the normal free work. Otherwise remove it from the node 1679 * table and mark it gone by clearing the back-reference. 1680 */ 1681static void 1682node_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 1683{ 1684 ieee80211_keyix keyix; 1685 1686 IEEE80211_NODE_LOCK_ASSERT(nt); 1687 1688 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1689 "%s: remove %p<%s> from %s table, refcnt %d\n", 1690 __func__, ni, ether_sprintf(ni->ni_macaddr), 1691 nt->nt_name, ieee80211_node_refcnt(ni)-1); 1692 /* 1693 * Clear any entry in the unicast key mapping table. 1694 * We need to do it here so rx lookups don't find it 1695 * in the mapping table even if it's not in the hash 1696 * table. We cannot depend on the mapping table entry 1697 * being cleared because the node may not be free'd. 1698 */ 1699 keyix = ni->ni_ucastkey.wk_rxkeyix; 1700 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax && 1701 nt->nt_keyixmap[keyix] == ni) { 1702 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1703 "%s: %p<%s> clear key map entry\n", 1704 __func__, ni, ether_sprintf(ni->ni_macaddr)); 1705 nt->nt_keyixmap[keyix] = NULL; 1706 ieee80211_node_decref(ni); /* NB: don't need free */ 1707 } 1708 if (!ieee80211_node_dectestref(ni)) { 1709 /* 1710 * Other references are present, just remove the 1711 * node from the table so it cannot be found. When 1712 * the references are dropped storage will be 1713 * reclaimed. 1714 */ 1715 TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1716 LIST_REMOVE(ni, ni_hash); 1717 ni->ni_table = NULL; /* clear reference */ 1718 } else 1719 _ieee80211_free_node(ni); 1720} 1721 1722/* 1723 * Reclaim a (bss) node. Decrement the refcnt and reclaim 1724 * the node if the only other reference to it is in the sta 1725 * table. This is effectively ieee80211_free_node followed 1726 * by node_reclaim when the refcnt is 1 (after the free). 1727 */ 1728static void 1729ieee80211_node_reclaim(struct ieee80211_node *ni) 1730{ 1731 struct ieee80211_node_table *nt = ni->ni_table; 1732 1733 KASSERT(nt != NULL, ("reclaim node not in table")); 1734 1735#ifdef IEEE80211_DEBUG_REFCNT 1736 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1737 "%s %p<%s> refcnt %d\n", __func__, ni, 1738 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1); 1739#endif 1740 IEEE80211_NODE_LOCK(nt); 1741 if (ieee80211_node_dectestref(ni)) { 1742 /* 1743 * Last reference, reclaim state. 1744 */ 1745 _ieee80211_free_node(ni); 1746 nt = NULL; 1747 } else if (ieee80211_node_refcnt(ni) == 1 && 1748 nt->nt_keyixmap != NULL) { 1749 ieee80211_keyix keyix; 1750 /* 1751 * Check for a last reference in the key mapping table. 1752 */ 1753 keyix = ni->ni_ucastkey.wk_rxkeyix; 1754 if (keyix < nt->nt_keyixmax && 1755 nt->nt_keyixmap[keyix] == ni) { 1756 IEEE80211_DPRINTF(ni->ni_vap, 1757 IEEE80211_MSG_NODE, 1758 "%s: %p<%s> clear key map entry", __func__, 1759 ni, ether_sprintf(ni->ni_macaddr)); 1760 nt->nt_keyixmap[keyix] = NULL; 1761 ieee80211_node_decref(ni); /* XXX needed? */ 1762 _ieee80211_free_node(ni); 1763 nt = NULL; 1764 } 1765 } 1766 if (nt != NULL && ieee80211_node_refcnt(ni) == 1) { 1767 /* 1768 * Last reference is in the sta table; complete 1769 * the reclaim. This handles bss nodes being 1770 * recycled: the node has two references, one for 1771 * iv_bss and one for the table. After dropping 1772 * the iv_bss ref above we need to reclaim the sta 1773 * table reference. 1774 */ 1775 ieee80211_node_decref(ni); /* NB: be pendantic */ 1776 _ieee80211_free_node(ni); 1777 } 1778 IEEE80211_NODE_UNLOCK(nt); 1779} 1780 1781/* 1782 * Node table support. 1783 */ 1784 1785static void 1786ieee80211_node_table_init(struct ieee80211com *ic, 1787 struct ieee80211_node_table *nt, 1788 const char *name, int inact, int keyixmax) 1789{ 1790 struct ifnet *ifp = ic->ic_ifp; 1791 1792 nt->nt_ic = ic; 1793 IEEE80211_NODE_LOCK_INIT(nt, ifp->if_xname); 1794 IEEE80211_NODE_ITERATE_LOCK_INIT(nt, ifp->if_xname); 1795 TAILQ_INIT(&nt->nt_node); 1796 nt->nt_name = name; 1797 nt->nt_scangen = 1; 1798 nt->nt_inact_init = inact; 1799 nt->nt_keyixmax = keyixmax; 1800 if (nt->nt_keyixmax > 0) { 1801 nt->nt_keyixmap = (struct ieee80211_node **) malloc( 1802 keyixmax * sizeof(struct ieee80211_node *), 1803 M_80211_NODE, M_NOWAIT | M_ZERO); 1804 if (nt->nt_keyixmap == NULL) 1805 if_printf(ic->ic_ifp, 1806 "Cannot allocate key index map with %u entries\n", 1807 keyixmax); 1808 } else 1809 nt->nt_keyixmap = NULL; 1810} 1811 1812static void 1813ieee80211_node_table_reset(struct ieee80211_node_table *nt, 1814 struct ieee80211vap *match) 1815{ 1816 struct ieee80211_node *ni, *next; 1817 1818 IEEE80211_NODE_LOCK(nt); 1819 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) { 1820 if (match != NULL && ni->ni_vap != match) 1821 continue; 1822 /* XXX can this happen? if so need's work */ 1823 if (ni->ni_associd != 0) { 1824 struct ieee80211vap *vap = ni->ni_vap; 1825 1826 if (vap->iv_auth->ia_node_leave != NULL) 1827 vap->iv_auth->ia_node_leave(ni); 1828 if (vap->iv_aid_bitmap != NULL) 1829 IEEE80211_AID_CLR(vap, ni->ni_associd); 1830 } 1831 ni->ni_wdsvap = NULL; /* clear reference */ 1832 node_reclaim(nt, ni); 1833 } 1834 if (match != NULL && match->iv_opmode == IEEE80211_M_WDS) { 1835 /* 1836 * Make a separate pass to clear references to this vap 1837 * held by DWDS entries. They will not be matched above 1838 * because ni_vap will point to the ap vap but we still 1839 * need to clear ni_wdsvap when the WDS vap is destroyed 1840 * and/or reset. 1841 */ 1842 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) 1843 if (ni->ni_wdsvap == match) 1844 ni->ni_wdsvap = NULL; 1845 } 1846 IEEE80211_NODE_UNLOCK(nt); 1847} 1848 1849static void 1850ieee80211_node_table_cleanup(struct ieee80211_node_table *nt) 1851{ 1852 ieee80211_node_table_reset(nt, NULL); 1853 if (nt->nt_keyixmap != NULL) { 1854#ifdef DIAGNOSTIC 1855 /* XXX verify all entries are NULL */ 1856 int i; 1857 for (i = 0; i < nt->nt_keyixmax; i++) 1858 if (nt->nt_keyixmap[i] != NULL) 1859 printf("%s: %s[%u] still active\n", __func__, 1860 nt->nt_name, i); 1861#endif 1862 free(nt->nt_keyixmap, M_80211_NODE); 1863 nt->nt_keyixmap = NULL; 1864 } 1865 IEEE80211_NODE_ITERATE_LOCK_DESTROY(nt); 1866 IEEE80211_NODE_LOCK_DESTROY(nt); 1867} 1868 1869/* 1870 * Timeout inactive stations and do related housekeeping. 1871 * Note that we cannot hold the node lock while sending a 1872 * frame as this would lead to a LOR. Instead we use a 1873 * generation number to mark nodes that we've scanned and 1874 * drop the lock and restart a scan if we have to time out 1875 * a node. Since we are single-threaded by virtue of 1876 * controlling the inactivity timer we can be sure this will 1877 * process each node only once. 1878 */ 1879static void 1880ieee80211_timeout_stations(struct ieee80211com *ic) 1881{ 1882 struct ieee80211_node_table *nt = &ic->ic_sta; 1883 struct ieee80211vap *vap; 1884 struct ieee80211_node *ni; 1885 int gen = 0; 1886 1887 IEEE80211_NODE_ITERATE_LOCK(nt); 1888 gen = ++nt->nt_scangen; 1889restart: 1890 IEEE80211_NODE_LOCK(nt); 1891 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 1892 if (ni->ni_scangen == gen) /* previously handled */ 1893 continue; 1894 ni->ni_scangen = gen; 1895 /* 1896 * Ignore entries for which have yet to receive an 1897 * authentication frame. These are transient and 1898 * will be reclaimed when the last reference to them 1899 * goes away (when frame xmits complete). 1900 */ 1901 vap = ni->ni_vap; 1902 /* 1903 * Only process stations when in RUN state. This 1904 * insures, for example, that we don't timeout an 1905 * inactive station during CAC. Note that CSA state 1906 * is actually handled in ieee80211_node_timeout as 1907 * it applies to more than timeout processing. 1908 */ 1909 if (vap->iv_state != IEEE80211_S_RUN) 1910 continue; 1911 /* XXX can vap be NULL? */ 1912 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 1913 vap->iv_opmode == IEEE80211_M_STA) && 1914 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 1915 continue; 1916 /* 1917 * Free fragment if not needed anymore 1918 * (last fragment older than 1s). 1919 * XXX doesn't belong here, move to node_age 1920 */ 1921 if (ni->ni_rxfrag[0] != NULL && 1922 ticks > ni->ni_rxfragstamp + hz) { 1923 m_freem(ni->ni_rxfrag[0]); 1924 ni->ni_rxfrag[0] = NULL; 1925 } 1926 if (ni->ni_inact > 0) { 1927 ni->ni_inact--; 1928 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 1929 "%s: inact %u inact_reload %u nrates %u", 1930 __func__, ni->ni_inact, ni->ni_inact_reload, 1931 ni->ni_rates.rs_nrates); 1932 } 1933 /* 1934 * Special case ourself; we may be idle for extended periods 1935 * of time and regardless reclaiming our state is wrong. 1936 * XXX run ic_node_age 1937 */ 1938 if (ni == vap->iv_bss) 1939 continue; 1940 if (ni->ni_associd != 0 || 1941 (vap->iv_opmode == IEEE80211_M_IBSS || 1942 vap->iv_opmode == IEEE80211_M_AHDEMO)) { 1943 /* 1944 * Age/drain resources held by the station. 1945 */ 1946 ic->ic_node_age(ni); 1947 /* 1948 * Probe the station before time it out. We 1949 * send a null data frame which may not be 1950 * universally supported by drivers (need it 1951 * for ps-poll support so it should be...). 1952 * 1953 * XXX don't probe the station unless we've 1954 * received a frame from them (and have 1955 * some idea of the rates they are capable 1956 * of); this will get fixed more properly 1957 * soon with better handling of the rate set. 1958 */ 1959 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 1960 (0 < ni->ni_inact && 1961 ni->ni_inact <= vap->iv_inact_probe) && 1962 ni->ni_rates.rs_nrates != 0) { 1963 IEEE80211_NOTE(vap, 1964 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, 1965 ni, "%s", 1966 "probe station due to inactivity"); 1967 /* 1968 * Grab a reference before unlocking the table 1969 * so the node cannot be reclaimed before we 1970 * send the frame. ieee80211_send_nulldata 1971 * understands we've done this and reclaims the 1972 * ref for us as needed. 1973 */ 1974 ieee80211_ref_node(ni); 1975 IEEE80211_NODE_UNLOCK(nt); 1976 ieee80211_send_nulldata(ni); 1977 /* XXX stat? */ 1978 goto restart; 1979 } 1980 } 1981 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 1982 ni->ni_inact <= 0) { 1983 IEEE80211_NOTE(vap, 1984 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, ni, 1985 "station timed out due to inactivity " 1986 "(refcnt %u)", ieee80211_node_refcnt(ni)); 1987 /* 1988 * Send a deauthenticate frame and drop the station. 1989 * This is somewhat complicated due to reference counts 1990 * and locking. At this point a station will typically 1991 * have a reference count of 1. ieee80211_node_leave 1992 * will do a "free" of the node which will drop the 1993 * reference count. But in the meantime a reference 1994 * wil be held by the deauth frame. The actual reclaim 1995 * of the node will happen either after the tx is 1996 * completed or by ieee80211_node_leave. 1997 * 1998 * Separately we must drop the node lock before sending 1999 * in case the driver takes a lock, as this can result 2000 * in a LOR between the node lock and the driver lock. 2001 */ 2002 ieee80211_ref_node(ni); 2003 IEEE80211_NODE_UNLOCK(nt); 2004 if (ni->ni_associd != 0) { 2005 IEEE80211_SEND_MGMT(ni, 2006 IEEE80211_FC0_SUBTYPE_DEAUTH, 2007 IEEE80211_REASON_AUTH_EXPIRE); 2008 } 2009 ieee80211_node_leave(ni); 2010 ieee80211_free_node(ni); 2011 vap->iv_stats.is_node_timeout++; 2012 goto restart; 2013 } 2014 } 2015 IEEE80211_NODE_UNLOCK(nt); 2016 2017 IEEE80211_NODE_ITERATE_UNLOCK(nt); 2018} 2019 2020/* 2021 * Aggressively reclaim resources. This should be used 2022 * only in a critical situation to reclaim mbuf resources. 2023 */ 2024void 2025ieee80211_drain(struct ieee80211com *ic) 2026{ 2027 struct ieee80211_node_table *nt = &ic->ic_sta; 2028 struct ieee80211vap *vap; 2029 struct ieee80211_node *ni; 2030 2031 IEEE80211_NODE_LOCK(nt); 2032 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2033 /* 2034 * Ignore entries for which have yet to receive an 2035 * authentication frame. These are transient and 2036 * will be reclaimed when the last reference to them 2037 * goes away (when frame xmits complete). 2038 */ 2039 vap = ni->ni_vap; 2040 /* 2041 * Only process stations when in RUN state. This 2042 * insures, for example, that we don't timeout an 2043 * inactive station during CAC. Note that CSA state 2044 * is actually handled in ieee80211_node_timeout as 2045 * it applies to more than timeout processing. 2046 */ 2047 if (vap->iv_state != IEEE80211_S_RUN) 2048 continue; 2049 /* XXX can vap be NULL? */ 2050 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 2051 vap->iv_opmode == IEEE80211_M_STA) && 2052 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 2053 continue; 2054 /* 2055 * Free fragments. 2056 * XXX doesn't belong here, move to node_drain 2057 */ 2058 if (ni->ni_rxfrag[0] != NULL) { 2059 m_freem(ni->ni_rxfrag[0]); 2060 ni->ni_rxfrag[0] = NULL; 2061 } 2062 /* 2063 * Drain resources held by the station. 2064 */ 2065 ic->ic_node_drain(ni); 2066 } 2067 IEEE80211_NODE_UNLOCK(nt); 2068} 2069 2070/* 2071 * Per-ieee80211com inactivity timer callback. 2072 */ 2073void 2074ieee80211_node_timeout(void *arg) 2075{ 2076 struct ieee80211com *ic = arg; 2077 2078 /* 2079 * Defer timeout processing if a channel switch is pending. 2080 * We typically need to be mute so not doing things that 2081 * might generate frames is good to handle in one place. 2082 * Supressing the station timeout processing may extend the 2083 * lifetime of inactive stations (by not decrementing their 2084 * idle counters) but this should be ok unless the CSA is 2085 * active for an unusually long time. 2086 */ 2087 if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) { 2088 ieee80211_scan_timeout(ic); 2089 ieee80211_timeout_stations(ic); 2090 2091 IEEE80211_LOCK(ic); 2092 ieee80211_erp_timeout(ic); 2093 ieee80211_ht_timeout(ic); 2094 IEEE80211_UNLOCK(ic); 2095 } 2096 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, 2097 ieee80211_node_timeout, ic); 2098} 2099 2100void 2101ieee80211_iterate_nodes(struct ieee80211_node_table *nt, 2102 ieee80211_iter_func *f, void *arg) 2103{ 2104 struct ieee80211_node *ni; 2105 u_int gen; 2106 2107 IEEE80211_NODE_ITERATE_LOCK(nt); 2108 gen = ++nt->nt_scangen; 2109restart: 2110 IEEE80211_NODE_LOCK(nt); 2111 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2112 if (ni->ni_scangen != gen) { 2113 ni->ni_scangen = gen; 2114 (void) ieee80211_ref_node(ni); 2115 IEEE80211_NODE_UNLOCK(nt); 2116 (*f)(arg, ni); 2117 ieee80211_free_node(ni); 2118 goto restart; 2119 } 2120 } 2121 IEEE80211_NODE_UNLOCK(nt); 2122 2123 IEEE80211_NODE_ITERATE_UNLOCK(nt); 2124} 2125 2126void 2127ieee80211_dump_node(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 2128{ 2129 printf("0x%p: mac %s refcnt %d\n", ni, 2130 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)); 2131 printf("\tscangen %u authmode %u flags 0x%x\n", 2132 ni->ni_scangen, ni->ni_authmode, ni->ni_flags); 2133 printf("\tassocid 0x%x txpower %u vlan %u\n", 2134 ni->ni_associd, ni->ni_txpower, ni->ni_vlan); 2135 printf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n", 2136 ni->ni_txseqs[IEEE80211_NONQOS_TID], 2137 ni->ni_rxseqs[IEEE80211_NONQOS_TID] >> IEEE80211_SEQ_SEQ_SHIFT, 2138 ni->ni_rxseqs[IEEE80211_NONQOS_TID] & IEEE80211_SEQ_FRAG_MASK, 2139 ni->ni_rxfragstamp); 2140 printf("\trstamp %u rssi %d noise %d intval %u capinfo 0x%x\n", 2141 ni->ni_rstamp, node_getrssi(ni), ni->ni_noise, 2142 ni->ni_intval, ni->ni_capinfo); 2143 printf("\tbssid %s essid \"%.*s\" channel %u:0x%x\n", 2144 ether_sprintf(ni->ni_bssid), 2145 ni->ni_esslen, ni->ni_essid, 2146 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags); 2147 printf("\tinact %u inact_reload %u txrate %u\n", 2148 ni->ni_inact, ni->ni_inact_reload, ni->ni_txrate); 2149 printf("\thtcap %x htparam %x htctlchan %u ht2ndchan %u\n", 2150 ni->ni_htcap, ni->ni_htparam, 2151 ni->ni_htctlchan, ni->ni_ht2ndchan); 2152 printf("\thtopmode %x htstbc %x chw %u\n", 2153 ni->ni_htopmode, ni->ni_htstbc, ni->ni_chw); 2154} 2155 2156void 2157ieee80211_dump_nodes(struct ieee80211_node_table *nt) 2158{ 2159 ieee80211_iterate_nodes(nt, 2160 (ieee80211_iter_func *) ieee80211_dump_node, nt); 2161} 2162 2163static void 2164ieee80211_notify_erp_locked(struct ieee80211com *ic) 2165{ 2166 struct ieee80211vap *vap; 2167 2168 IEEE80211_LOCK_ASSERT(ic); 2169 2170 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 2171 if (vap->iv_opmode == IEEE80211_M_HOSTAP) 2172 ieee80211_beacon_notify(vap, IEEE80211_BEACON_ERP); 2173} 2174 2175void 2176ieee80211_notify_erp(struct ieee80211com *ic) 2177{ 2178 IEEE80211_LOCK(ic); 2179 ieee80211_notify_erp_locked(ic); 2180 IEEE80211_UNLOCK(ic); 2181} 2182 2183/* 2184 * Handle a station joining an 11g network. 2185 */ 2186static void 2187ieee80211_node_join_11g(struct ieee80211_node *ni) 2188{ 2189 struct ieee80211com *ic = ni->ni_ic; 2190 2191 IEEE80211_LOCK_ASSERT(ic); 2192 2193 /* 2194 * Station isn't capable of short slot time. Bump 2195 * the count of long slot time stations and disable 2196 * use of short slot time. Note that the actual switch 2197 * over to long slot time use may not occur until the 2198 * next beacon transmission (per sec. 7.3.1.4 of 11g). 2199 */ 2200 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2201 ic->ic_longslotsta++; 2202 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2203 "station needs long slot time, count %d", 2204 ic->ic_longslotsta); 2205 /* XXX vap's w/ conflicting needs won't work */ 2206 if (!IEEE80211_IS_CHAN_108G(ic->ic_bsschan)) { 2207 /* 2208 * Don't force slot time when switched to turbo 2209 * mode as non-ERP stations won't be present; this 2210 * need only be done when on the normal G channel. 2211 */ 2212 ieee80211_set_shortslottime(ic, 0); 2213 } 2214 } 2215 /* 2216 * If the new station is not an ERP station 2217 * then bump the counter and enable protection 2218 * if configured. 2219 */ 2220 if (!ieee80211_iserp_rateset(&ni->ni_rates)) { 2221 ic->ic_nonerpsta++; 2222 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2223 "station is !ERP, %d non-ERP stations associated", 2224 ic->ic_nonerpsta); 2225 /* 2226 * If station does not support short preamble 2227 * then we must enable use of Barker preamble. 2228 */ 2229 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) { 2230 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2231 "%s", "station needs long preamble"); 2232 ic->ic_flags |= IEEE80211_F_USEBARKER; 2233 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; 2234 } 2235 /* 2236 * If protection is configured and this is the first 2237 * indication we should use protection, enable it. 2238 */ 2239 if (ic->ic_protmode != IEEE80211_PROT_NONE && 2240 ic->ic_nonerpsta == 1 && 2241 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2242 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2243 "%s: enable use of protection\n", __func__); 2244 ic->ic_flags |= IEEE80211_F_USEPROT; 2245 ieee80211_notify_erp_locked(ic); 2246 } 2247 } else 2248 ni->ni_flags |= IEEE80211_NODE_ERP; 2249} 2250 2251void 2252ieee80211_node_join(struct ieee80211_node *ni, int resp) 2253{ 2254 struct ieee80211com *ic = ni->ni_ic; 2255 struct ieee80211vap *vap = ni->ni_vap; 2256 int newassoc; 2257 2258 if (ni->ni_associd == 0) { 2259 uint16_t aid; 2260 2261 KASSERT(vap->iv_aid_bitmap != NULL, ("no aid bitmap")); 2262 /* 2263 * It would be good to search the bitmap 2264 * more efficiently, but this will do for now. 2265 */ 2266 for (aid = 1; aid < vap->iv_max_aid; aid++) { 2267 if (!IEEE80211_AID_ISSET(vap, aid)) 2268 break; 2269 } 2270 if (aid >= vap->iv_max_aid) { 2271 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_TOOMANY); 2272 ieee80211_node_leave(ni); 2273 return; 2274 } 2275 ni->ni_associd = aid | 0xc000; 2276 ni->ni_jointime = time_uptime; 2277 IEEE80211_LOCK(ic); 2278 IEEE80211_AID_SET(vap, ni->ni_associd); 2279 vap->iv_sta_assoc++; 2280 ic->ic_sta_assoc++; 2281 2282 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2283 ieee80211_ht_node_join(ni); 2284 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2285 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2286 ieee80211_node_join_11g(ni); 2287 IEEE80211_UNLOCK(ic); 2288 2289 newassoc = 1; 2290 } else 2291 newassoc = 0; 2292 2293 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2294 "station associated at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s", 2295 IEEE80211_NODE_AID(ni), 2296 ic->ic_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long", 2297 ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long", 2298 ic->ic_flags & IEEE80211_F_USEPROT ? ", protection" : "", 2299 ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "", 2300 ni->ni_flags & IEEE80211_NODE_HT ? 2301 (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "", 2302 ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "", 2303 ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" : 2304 ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "", 2305 ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "", 2306 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ? 2307 ", fast-frames" : "", 2308 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ? 2309 ", turbo" : "" 2310 ); 2311 2312 node_setuptxparms(ni); 2313 /* give driver a chance to setup state like ni_txrate */ 2314 if (ic->ic_newassoc != NULL) 2315 ic->ic_newassoc(ni, newassoc); 2316 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_SUCCESS); 2317 /* tell the authenticator about new station */ 2318 if (vap->iv_auth->ia_node_join != NULL) 2319 vap->iv_auth->ia_node_join(ni); 2320 ieee80211_notify_node_join(ni, 2321 resp == IEEE80211_FC0_SUBTYPE_ASSOC_RESP); 2322} 2323 2324static void 2325disable_protection(struct ieee80211com *ic) 2326{ 2327 KASSERT(ic->ic_nonerpsta == 0 && 2328 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0, 2329 ("%d non ERP stations, flags 0x%x", ic->ic_nonerpsta, 2330 ic->ic_flags_ext)); 2331 2332 ic->ic_flags &= ~IEEE80211_F_USEPROT; 2333 /* XXX verify mode? */ 2334 if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) { 2335 ic->ic_flags |= IEEE80211_F_SHPREAMBLE; 2336 ic->ic_flags &= ~IEEE80211_F_USEBARKER; 2337 } 2338 ieee80211_notify_erp_locked(ic); 2339} 2340 2341/* 2342 * Handle a station leaving an 11g network. 2343 */ 2344static void 2345ieee80211_node_leave_11g(struct ieee80211_node *ni) 2346{ 2347 struct ieee80211com *ic = ni->ni_ic; 2348 2349 IEEE80211_LOCK_ASSERT(ic); 2350 2351 KASSERT(IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan), 2352 ("not in 11g, bss %u:0x%x", ic->ic_bsschan->ic_freq, 2353 ic->ic_bsschan->ic_flags)); 2354 2355 /* 2356 * If a long slot station do the slot time bookkeeping. 2357 */ 2358 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2359 KASSERT(ic->ic_longslotsta > 0, 2360 ("bogus long slot station count %d", ic->ic_longslotsta)); 2361 ic->ic_longslotsta--; 2362 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2363 "long slot time station leaves, count now %d", 2364 ic->ic_longslotsta); 2365 if (ic->ic_longslotsta == 0) { 2366 /* 2367 * Re-enable use of short slot time if supported 2368 * and not operating in IBSS mode (per spec). 2369 */ 2370 if ((ic->ic_caps & IEEE80211_C_SHSLOT) && 2371 ic->ic_opmode != IEEE80211_M_IBSS) { 2372 IEEE80211_DPRINTF(ni->ni_vap, 2373 IEEE80211_MSG_ASSOC, 2374 "%s: re-enable use of short slot time\n", 2375 __func__); 2376 ieee80211_set_shortslottime(ic, 1); 2377 } 2378 } 2379 } 2380 /* 2381 * If a non-ERP station do the protection-related bookkeeping. 2382 */ 2383 if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) { 2384 KASSERT(ic->ic_nonerpsta > 0, 2385 ("bogus non-ERP station count %d", ic->ic_nonerpsta)); 2386 ic->ic_nonerpsta--; 2387 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2388 "non-ERP station leaves, count now %d%s", ic->ic_nonerpsta, 2389 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) ? 2390 " (non-ERP sta present)" : ""); 2391 if (ic->ic_nonerpsta == 0 && 2392 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2393 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2394 "%s: disable use of protection\n", __func__); 2395 disable_protection(ic); 2396 } 2397 } 2398} 2399 2400/* 2401 * Time out presence of an overlapping bss with non-ERP 2402 * stations. When operating in hostap mode we listen for 2403 * beacons from other stations and if we identify a non-ERP 2404 * station is present we enable protection. To identify 2405 * when all non-ERP stations are gone we time out this 2406 * condition. 2407 */ 2408static void 2409ieee80211_erp_timeout(struct ieee80211com *ic) 2410{ 2411 2412 IEEE80211_LOCK_ASSERT(ic); 2413 2414 if ((ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) && 2415 time_after(ticks, ic->ic_lastnonerp + IEEE80211_NONERP_PRESENT_AGE)) { 2416#if 0 2417 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni, 2418 "%s", "age out non-ERP sta present on channel"); 2419#endif 2420 ic->ic_flags_ext &= ~IEEE80211_FEXT_NONERP_PR; 2421 if (ic->ic_nonerpsta == 0) 2422 disable_protection(ic); 2423 } 2424} 2425 2426/* 2427 * Handle bookkeeping for station deauthentication/disassociation 2428 * when operating as an ap. 2429 */ 2430void 2431ieee80211_node_leave(struct ieee80211_node *ni) 2432{ 2433 struct ieee80211com *ic = ni->ni_ic; 2434 struct ieee80211vap *vap = ni->ni_vap; 2435 struct ieee80211_node_table *nt = ni->ni_table; 2436 2437 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2438 "station with aid %d leaves", IEEE80211_NODE_AID(ni)); 2439 2440 KASSERT(vap->iv_opmode != IEEE80211_M_STA, 2441 ("unexpected operating mode %u", vap->iv_opmode)); 2442 /* 2443 * If node wasn't previously associated all 2444 * we need to do is reclaim the reference. 2445 */ 2446 /* XXX ibss mode bypasses 11g and notification */ 2447 if (ni->ni_associd == 0) 2448 goto done; 2449 /* 2450 * Tell the authenticator the station is leaving. 2451 * Note that we must do this before yanking the 2452 * association id as the authenticator uses the 2453 * associd to locate it's state block. 2454 */ 2455 if (vap->iv_auth->ia_node_leave != NULL) 2456 vap->iv_auth->ia_node_leave(ni); 2457 2458 IEEE80211_LOCK(ic); 2459 IEEE80211_AID_CLR(vap, ni->ni_associd); 2460 ni->ni_associd = 0; 2461 vap->iv_sta_assoc--; 2462 ic->ic_sta_assoc--; 2463 2464 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2465 ieee80211_ht_node_leave(ni); 2466 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2467 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2468 ieee80211_node_leave_11g(ni); 2469 IEEE80211_UNLOCK(ic); 2470 /* 2471 * Cleanup station state. In particular clear various 2472 * state that might otherwise be reused if the node 2473 * is reused before the reference count goes to zero 2474 * (and memory is reclaimed). 2475 */ 2476 ieee80211_sta_leave(ni); 2477done: 2478 /* 2479 * Remove the node from any table it's recorded in and 2480 * drop the caller's reference. Removal from the table 2481 * is important to insure the node is not reprocessed 2482 * for inactivity. 2483 */ 2484 if (nt != NULL) { 2485 IEEE80211_NODE_LOCK(nt); 2486 node_reclaim(nt, ni); 2487 IEEE80211_NODE_UNLOCK(nt); 2488 } else 2489 ieee80211_free_node(ni); 2490} 2491 2492struct rssiinfo { 2493 struct ieee80211vap *vap; 2494 int rssi_samples; 2495 uint32_t rssi_total; 2496}; 2497 2498static void 2499get_hostap_rssi(void *arg, struct ieee80211_node *ni) 2500{ 2501 struct rssiinfo *info = arg; 2502 struct ieee80211vap *vap = ni->ni_vap; 2503 int8_t rssi; 2504 2505 if (info->vap != vap) 2506 return; 2507 /* only associated stations */ 2508 if (ni->ni_associd == 0) 2509 return; 2510 rssi = vap->iv_ic->ic_node_getrssi(ni); 2511 if (rssi != 0) { 2512 info->rssi_samples++; 2513 info->rssi_total += rssi; 2514 } 2515} 2516 2517static void 2518get_adhoc_rssi(void *arg, struct ieee80211_node *ni) 2519{ 2520 struct rssiinfo *info = arg; 2521 struct ieee80211vap *vap = ni->ni_vap; 2522 int8_t rssi; 2523 2524 if (info->vap != vap) 2525 return; 2526 /* only neighbors */ 2527 /* XXX check bssid */ 2528 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 2529 return; 2530 rssi = vap->iv_ic->ic_node_getrssi(ni); 2531 if (rssi != 0) { 2532 info->rssi_samples++; 2533 info->rssi_total += rssi; 2534 } 2535} 2536 2537int8_t 2538ieee80211_getrssi(struct ieee80211vap *vap) 2539{ 2540#define NZ(x) ((x) == 0 ? 1 : (x)) 2541 struct ieee80211com *ic = vap->iv_ic; 2542 struct rssiinfo info; 2543 2544 info.rssi_total = 0; 2545 info.rssi_samples = 0; 2546 info.vap = vap; 2547 switch (vap->iv_opmode) { 2548 case IEEE80211_M_IBSS: /* average of all ibss neighbors */ 2549 case IEEE80211_M_AHDEMO: /* average of all neighbors */ 2550 ieee80211_iterate_nodes(&ic->ic_sta, get_adhoc_rssi, &info); 2551 break; 2552 case IEEE80211_M_HOSTAP: /* average of all associated stations */ 2553 ieee80211_iterate_nodes(&ic->ic_sta, get_hostap_rssi, &info); 2554 break; 2555 case IEEE80211_M_MONITOR: /* XXX */ 2556 case IEEE80211_M_STA: /* use stats from associated ap */ 2557 default: 2558 if (vap->iv_bss != NULL) 2559 info.rssi_total = ic->ic_node_getrssi(vap->iv_bss); 2560 info.rssi_samples = 1; 2561 break; 2562 } 2563 return info.rssi_total / NZ(info.rssi_samples); 2564#undef NZ 2565} 2566 2567void 2568ieee80211_getsignal(struct ieee80211vap *vap, int8_t *rssi, int8_t *noise) 2569{ 2570 2571 if (vap->iv_bss == NULL) /* NB: shouldn't happen */ 2572 return; 2573 vap->iv_ic->ic_node_getsignal(vap->iv_bss, rssi, noise); 2574 /* for non-station mode return avg'd rssi accounting */ 2575 if (vap->iv_opmode != IEEE80211_M_STA) 2576 *rssi = ieee80211_getrssi(vap); 2577} 2578