ieee80211_node.c revision 179643
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 179643 2008-06-07 18:38:02Z 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 140void 141ieee80211_node_latevattach(struct ieee80211vap *vap) 142{ 143 if (vap->iv_opmode == IEEE80211_M_HOSTAP) { 144 /* XXX should we allow max aid to be zero? */ 145 if (vap->iv_max_aid < IEEE80211_AID_MIN) { 146 vap->iv_max_aid = IEEE80211_AID_MIN; 147 if_printf(vap->iv_ifp, 148 "WARNING: max aid too small, changed to %d\n", 149 vap->iv_max_aid); 150 } 151 MALLOC(vap->iv_aid_bitmap, uint32_t *, 152 howmany(vap->iv_max_aid, 32) * sizeof(uint32_t), 153 M_80211_NODE, M_NOWAIT | M_ZERO); 154 if (vap->iv_aid_bitmap == NULL) { 155 /* XXX no way to recover */ 156 printf("%s: no memory for AID bitmap, max aid %d!\n", 157 __func__, vap->iv_max_aid); 158 vap->iv_max_aid = 0; 159 } 160 } 161 162 ieee80211_reset_bss(vap); 163 164 vap->iv_auth = ieee80211_authenticator_get(vap->iv_bss->ni_authmode); 165} 166 167void 168ieee80211_node_vdetach(struct ieee80211vap *vap) 169{ 170 struct ieee80211com *ic = vap->iv_ic; 171 172 ieee80211_node_table_reset(&ic->ic_sta, vap); 173 if (vap->iv_bss != NULL) { 174 ieee80211_free_node(vap->iv_bss); 175 vap->iv_bss = NULL; 176 } 177 if (vap->iv_aid_bitmap != NULL) { 178 FREE(vap->iv_aid_bitmap, M_80211_NODE); 179 vap->iv_aid_bitmap = NULL; 180 } 181} 182 183/* 184 * Port authorize/unauthorize interfaces for use by an authenticator. 185 */ 186 187void 188ieee80211_node_authorize(struct ieee80211_node *ni) 189{ 190 ni->ni_flags |= IEEE80211_NODE_AUTH; 191 ni->ni_inact_reload = ni->ni_vap->iv_inact_run; 192 ni->ni_inact = ni->ni_inact_reload; 193} 194 195void 196ieee80211_node_unauthorize(struct ieee80211_node *ni) 197{ 198 ni->ni_flags &= ~IEEE80211_NODE_AUTH; 199 ni->ni_inact_reload = ni->ni_vap->iv_inact_auth; 200 if (ni->ni_inact > ni->ni_inact_reload) 201 ni->ni_inact = ni->ni_inact_reload; 202} 203 204/* 205 * Set/change the channel. The rate set is also updated as 206 * to insure a consistent view by drivers. 207 * XXX should be private but hostap needs it to deal with CSA 208 */ 209void 210ieee80211_node_set_chan(struct ieee80211_node *ni, 211 struct ieee80211_channel *chan) 212{ 213 struct ieee80211com *ic = ni->ni_ic; 214 215 KASSERT(chan != IEEE80211_CHAN_ANYC, ("no channel")); 216 217 ni->ni_chan = chan; 218 if (IEEE80211_IS_CHAN_HT(chan)) { 219 /* 220 * XXX Gotta be careful here; the rate set returned by 221 * ieee80211_get_suprates is actually any HT rate 222 * set so blindly copying it will be bad. We must 223 * install the legacy rate est in ni_rates and the 224 * HT rate set in ni_htrates. 225 */ 226 ni->ni_htrates = *ieee80211_get_suphtrates(ic, chan); 227 } 228 ni->ni_rates = *ieee80211_get_suprates(ic, chan); 229} 230 231static __inline void 232copy_bss(struct ieee80211_node *nbss, const struct ieee80211_node *obss) 233{ 234 /* propagate useful state */ 235 nbss->ni_authmode = obss->ni_authmode; 236 nbss->ni_txpower = obss->ni_txpower; 237 nbss->ni_vlan = obss->ni_vlan; 238 /* XXX statistics? */ 239 /* XXX legacy WDS bssid? */ 240} 241 242void 243ieee80211_create_ibss(struct ieee80211vap* vap, struct ieee80211_channel *chan) 244{ 245 struct ieee80211com *ic = vap->iv_ic; 246 struct ieee80211_node *ni; 247 248 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, 249 "%s: creating ibss on channel %u\n", __func__, 250 ieee80211_chan2ieee(ic, chan)); 251 252 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr); 253 if (ni == NULL) { 254 /* XXX recovery? */ 255 return; 256 } 257 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr); 258 ni->ni_esslen = vap->iv_des_ssid[0].len; 259 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen); 260 if (vap->iv_bss != NULL) 261 copy_bss(ni, vap->iv_bss); 262 ni->ni_intval = ic->ic_bintval; 263 if (vap->iv_flags & IEEE80211_F_PRIVACY) 264 ni->ni_capinfo |= IEEE80211_CAPINFO_PRIVACY; 265 if (ic->ic_phytype == IEEE80211_T_FH) { 266 ni->ni_fhdwell = 200; /* XXX */ 267 ni->ni_fhindex = 1; 268 } 269 if (vap->iv_opmode == IEEE80211_M_IBSS) { 270 vap->iv_flags |= IEEE80211_F_SIBSS; 271 ni->ni_capinfo |= IEEE80211_CAPINFO_IBSS; /* XXX */ 272 if (vap->iv_flags & IEEE80211_F_DESBSSID) 273 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid); 274 else { 275 get_random_bytes(ni->ni_bssid, IEEE80211_ADDR_LEN); 276 /* clear group bit, add local bit */ 277 ni->ni_bssid[0] = (ni->ni_bssid[0] &~ 0x01) | 0x02; 278 } 279 } else if (vap->iv_opmode == IEEE80211_M_AHDEMO) { 280 if (vap->iv_flags & IEEE80211_F_DESBSSID) 281 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid); 282 else 283 memset(ni->ni_bssid, 0, IEEE80211_ADDR_LEN); 284 } 285 /* 286 * Fix the channel and related attributes. 287 */ 288 /* clear DFS CAC state on previous channel */ 289 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC && 290 ic->ic_bsschan->ic_freq != chan->ic_freq && 291 IEEE80211_IS_CHAN_CACDONE(ic->ic_bsschan)) 292 ieee80211_dfs_cac_clear(ic, ic->ic_bsschan); 293 ic->ic_bsschan = chan; 294 ieee80211_node_set_chan(ni, chan); 295 ic->ic_curmode = ieee80211_chan2mode(chan); 296 /* 297 * Do mode-specific setup. 298 */ 299 if (IEEE80211_IS_CHAN_FULL(chan)) { 300 if (IEEE80211_IS_CHAN_ANYG(chan)) { 301 /* 302 * Use a mixed 11b/11g basic rate set. 303 */ 304 ieee80211_setbasicrates(&ni->ni_rates, 305 IEEE80211_MODE_11G); 306 if (vap->iv_flags & IEEE80211_F_PUREG) { 307 /* 308 * Also mark OFDM rates basic so 11b 309 * stations do not join (WiFi compliance). 310 */ 311 ieee80211_addbasicrates(&ni->ni_rates, 312 IEEE80211_MODE_11A); 313 } 314 } else if (IEEE80211_IS_CHAN_B(chan)) { 315 /* 316 * Force pure 11b rate set. 317 */ 318 ieee80211_setbasicrates(&ni->ni_rates, 319 IEEE80211_MODE_11B); 320 } 321 } 322 323 (void) ieee80211_sta_join1(ieee80211_ref_node(ni)); 324} 325 326/* 327 * Reset bss state on transition to the INIT state. 328 * Clear any stations from the table (they have been 329 * deauth'd) and reset the bss node (clears key, rate 330 * etc. state). 331 */ 332void 333ieee80211_reset_bss(struct ieee80211vap *vap) 334{ 335 struct ieee80211com *ic = vap->iv_ic; 336 struct ieee80211_node *ni, *obss; 337 338 ieee80211_node_table_reset(&ic->ic_sta, vap); 339 /* XXX multi-bss: wrong */ 340 ieee80211_reset_erp(ic); 341 342 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr); 343 KASSERT(ni != NULL, ("unable to setup inital BSS node")); 344 obss = vap->iv_bss; 345 vap->iv_bss = ieee80211_ref_node(ni); 346 if (obss != NULL) { 347 copy_bss(ni, obss); 348 ni->ni_intval = ic->ic_bintval; 349 ieee80211_free_node(obss); 350 } else 351 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr); 352} 353 354static int 355match_ssid(const struct ieee80211_node *ni, 356 int nssid, const struct ieee80211_scan_ssid ssids[]) 357{ 358 int i; 359 360 for (i = 0; i < nssid; i++) { 361 if (ni->ni_esslen == ssids[i].len && 362 memcmp(ni->ni_essid, ssids[i].ssid, ni->ni_esslen) == 0) 363 return 1; 364 } 365 return 0; 366} 367 368/* 369 * Test a node for suitability/compatibility. 370 */ 371static int 372check_bss(struct ieee80211vap *vap, struct ieee80211_node *ni) 373{ 374 struct ieee80211com *ic = ni->ni_ic; 375 uint8_t rate; 376 377 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 378 return 0; 379 if (vap->iv_opmode == IEEE80211_M_IBSS) { 380 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 381 return 0; 382 } else { 383 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 384 return 0; 385 } 386 if (vap->iv_flags & IEEE80211_F_PRIVACY) { 387 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 388 return 0; 389 } else { 390 /* XXX does this mean privacy is supported or required? */ 391 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 392 return 0; 393 } 394 rate = ieee80211_fix_rate(ni, &ni->ni_rates, 395 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 396 if (rate & IEEE80211_RATE_BASIC) 397 return 0; 398 if (vap->iv_des_nssid != 0 && 399 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid)) 400 return 0; 401 if ((vap->iv_flags & IEEE80211_F_DESBSSID) && 402 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid)) 403 return 0; 404 return 1; 405} 406 407#ifdef IEEE80211_DEBUG 408/* 409 * Display node suitability/compatibility. 410 */ 411static void 412check_bss_debug(struct ieee80211vap *vap, struct ieee80211_node *ni) 413{ 414 struct ieee80211com *ic = ni->ni_ic; 415 uint8_t rate; 416 int fail; 417 418 fail = 0; 419 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 420 fail |= 0x01; 421 if (vap->iv_opmode == IEEE80211_M_IBSS) { 422 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 423 fail |= 0x02; 424 } else { 425 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 426 fail |= 0x02; 427 } 428 if (vap->iv_flags & IEEE80211_F_PRIVACY) { 429 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 430 fail |= 0x04; 431 } else { 432 /* XXX does this mean privacy is supported or required? */ 433 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 434 fail |= 0x04; 435 } 436 rate = ieee80211_fix_rate(ni, &ni->ni_rates, 437 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 438 if (rate & IEEE80211_RATE_BASIC) 439 fail |= 0x08; 440 if (vap->iv_des_nssid != 0 && 441 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid)) 442 fail |= 0x10; 443 if ((vap->iv_flags & IEEE80211_F_DESBSSID) && 444 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid)) 445 fail |= 0x20; 446 447 printf(" %c %s", fail ? '-' : '+', ether_sprintf(ni->ni_macaddr)); 448 printf(" %s%c", ether_sprintf(ni->ni_bssid), fail & 0x20 ? '!' : ' '); 449 printf(" %3d%c", 450 ieee80211_chan2ieee(ic, ni->ni_chan), fail & 0x01 ? '!' : ' '); 451 printf(" %2dM%c", (rate & IEEE80211_RATE_VAL) / 2, 452 fail & 0x08 ? '!' : ' '); 453 printf(" %4s%c", 454 (ni->ni_capinfo & IEEE80211_CAPINFO_ESS) ? "ess" : 455 (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) ? "ibss" : 456 "????", 457 fail & 0x02 ? '!' : ' '); 458 printf(" %3s%c ", 459 (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) ? "wep" : "no", 460 fail & 0x04 ? '!' : ' '); 461 ieee80211_print_essid(ni->ni_essid, ni->ni_esslen); 462 printf("%s\n", fail & 0x10 ? "!" : ""); 463} 464#endif /* IEEE80211_DEBUG */ 465 466/* 467 * Handle 802.11 ad hoc network merge. The 468 * convention, set by the Wireless Ethernet Compatibility Alliance 469 * (WECA), is that an 802.11 station will change its BSSID to match 470 * the "oldest" 802.11 ad hoc network, on the same channel, that 471 * has the station's desired SSID. The "oldest" 802.11 network 472 * sends beacons with the greatest TSF timestamp. 473 * 474 * The caller is assumed to validate TSF's before attempting a merge. 475 * 476 * Return !0 if the BSSID changed, 0 otherwise. 477 */ 478int 479ieee80211_ibss_merge(struct ieee80211_node *ni) 480{ 481 struct ieee80211vap *vap = ni->ni_vap; 482#ifdef IEEE80211_DEBUG 483 struct ieee80211com *ic = ni->ni_ic; 484#endif 485 486 if (ni == vap->iv_bss || 487 IEEE80211_ADDR_EQ(ni->ni_bssid, vap->iv_bss->ni_bssid)) { 488 /* unchanged, nothing to do */ 489 return 0; 490 } 491 if (!check_bss(vap, ni)) { 492 /* capabilities mismatch */ 493 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 494 "%s: merge failed, capabilities mismatch\n", __func__); 495#ifdef IEEE80211_DEBUG 496 if (ieee80211_msg_assoc(vap)) 497 check_bss_debug(vap, ni); 498#endif 499 vap->iv_stats.is_ibss_capmismatch++; 500 return 0; 501 } 502 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 503 "%s: new bssid %s: %s preamble, %s slot time%s\n", __func__, 504 ether_sprintf(ni->ni_bssid), 505 ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long", 506 ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long", 507 ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : "" 508 ); 509 return ieee80211_sta_join1(ieee80211_ref_node(ni)); 510} 511 512/* 513 * Calculate HT channel promotion flags for all vaps. 514 * This assumes ni_chan have been setup for each vap. 515 */ 516static int 517gethtadjustflags(struct ieee80211com *ic) 518{ 519 struct ieee80211vap *vap; 520 int flags; 521 522 flags = 0; 523 /* XXX locking */ 524 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 525 if (vap->iv_state < IEEE80211_S_RUN) 526 continue; 527 switch (vap->iv_opmode) { 528 case IEEE80211_M_WDS: 529 case IEEE80211_M_STA: 530 case IEEE80211_M_AHDEMO: 531 case IEEE80211_M_HOSTAP: 532 case IEEE80211_M_IBSS: 533 flags |= ieee80211_htchanflags(vap->iv_bss->ni_chan); 534 break; 535 default: 536 break; 537 } 538 } 539 return flags; 540} 541 542/* 543 * Check if the current channel needs to change based on whether 544 * any vap's are using HT20/HT40. This is used sync the state of 545 * ic_curchan after a channel width change on a running vap. 546 */ 547void 548ieee80211_sync_curchan(struct ieee80211com *ic) 549{ 550 struct ieee80211_channel *c; 551 552 c = ieee80211_ht_adjust_channel(ic, ic->ic_curchan, gethtadjustflags(ic)); 553 if (c != ic->ic_curchan) { 554 ic->ic_curchan = c; 555 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan); 556 ic->ic_set_channel(ic); 557 } 558} 559 560/* 561 * Change the current channel. The request channel may be 562 * promoted if other vap's are operating with HT20/HT40. 563 */ 564void 565ieee80211_setcurchan(struct ieee80211com *ic, struct ieee80211_channel *c) 566{ 567 if (ic->ic_htcaps & IEEE80211_HTC_HT) { 568 int flags = gethtadjustflags(ic); 569 /* 570 * Check for channel promotion required to support the 571 * set of running vap's. This assumes we are called 572 * after ni_chan is setup for each vap. 573 */ 574 /* NB: this assumes IEEE80211_FEXT_USEHT40 > IEEE80211_FEXT_HT */ 575 if (flags > ieee80211_htchanflags(c)) 576 c = ieee80211_ht_adjust_channel(ic, c, flags); 577 } 578 ic->ic_bsschan = ic->ic_curchan = c; 579 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan); 580 ic->ic_set_channel(ic); 581} 582 583/* 584 * Join the specified IBSS/BSS network. The node is assumed to 585 * be passed in with a held reference. 586 */ 587static int 588ieee80211_sta_join1(struct ieee80211_node *selbs) 589{ 590 struct ieee80211vap *vap = selbs->ni_vap; 591 struct ieee80211com *ic = selbs->ni_ic; 592 struct ieee80211_node *obss; 593 int canreassoc; 594 595 /* 596 * Committed to selbs, setup state. 597 */ 598 obss = vap->iv_bss; 599 /* 600 * Check if old+new node have the same address in which 601 * case we can reassociate when operating in sta mode. 602 */ 603 canreassoc = (obss != NULL && 604 vap->iv_state == IEEE80211_S_RUN && 605 IEEE80211_ADDR_EQ(obss->ni_macaddr, selbs->ni_macaddr)); 606 vap->iv_bss = selbs; /* NB: caller assumed to bump refcnt */ 607 if (obss != NULL) { 608 copy_bss(selbs, obss); 609 ieee80211_node_reclaim(obss); 610 obss = NULL; /* NB: guard against later use */ 611 } 612 613 /* 614 * Delete unusable rates; we've already checked 615 * that the negotiated rate set is acceptable. 616 */ 617 ieee80211_fix_rate(vap->iv_bss, &vap->iv_bss->ni_rates, 618 IEEE80211_F_DODEL | IEEE80211_F_JOIN); 619 620 ieee80211_setcurchan(ic, selbs->ni_chan); 621 /* 622 * Set the erp state (mostly the slot time) to deal with 623 * the auto-select case; this should be redundant if the 624 * mode is locked. 625 */ 626 ieee80211_reset_erp(ic); 627 ieee80211_wme_initparams(vap); 628 629 if (vap->iv_opmode == IEEE80211_M_STA) { 630 if (canreassoc) { 631 /* Reassociate */ 632 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 1); 633 } else { 634 /* 635 * Act as if we received a DEAUTH frame in case we 636 * are invoked from the RUN state. This will cause 637 * us to try to re-authenticate if we are operating 638 * as a station. 639 */ 640 ieee80211_new_state(vap, IEEE80211_S_AUTH, 641 IEEE80211_FC0_SUBTYPE_DEAUTH); 642 } 643 } else 644 ieee80211_new_state(vap, IEEE80211_S_RUN, -1); 645 return 1; 646} 647 648int 649ieee80211_sta_join(struct ieee80211vap *vap, 650 const struct ieee80211_scan_entry *se) 651{ 652 struct ieee80211com *ic = vap->iv_ic; 653 struct ieee80211_node *ni; 654 655 ni = ieee80211_alloc_node(&ic->ic_sta, vap, se->se_macaddr); 656 if (ni == NULL) { 657 /* XXX msg */ 658 return 0; 659 } 660 /* 661 * Expand scan state into node's format. 662 * XXX may not need all this stuff 663 */ 664 IEEE80211_ADDR_COPY(ni->ni_bssid, se->se_bssid); 665 ni->ni_esslen = se->se_ssid[1]; 666 memcpy(ni->ni_essid, se->se_ssid+2, ni->ni_esslen); 667 ni->ni_rstamp = se->se_rstamp; 668 ni->ni_tstamp.tsf = se->se_tstamp.tsf; 669 ni->ni_intval = se->se_intval; 670 ni->ni_capinfo = se->se_capinfo; 671 ni->ni_chan = se->se_chan; 672 ni->ni_timoff = se->se_timoff; 673 ni->ni_fhdwell = se->se_fhdwell; 674 ni->ni_fhindex = se->se_fhindex; 675 ni->ni_erp = se->se_erp; 676 IEEE80211_RSSI_LPF(ni->ni_avgrssi, se->se_rssi); 677 ni->ni_noise = se->se_noise; 678 679 if (ieee80211_ies_init(&ni->ni_ies, se->se_ies.data, se->se_ies.len)) { 680 ieee80211_ies_expand(&ni->ni_ies); 681 if (ni->ni_ies.ath_ie != NULL) 682 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 683 if (ni->ni_ies.htcap_ie != NULL) 684 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie); 685 if (ni->ni_ies.htinfo_ie != NULL) 686 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie); 687 } 688 689 vap->iv_dtim_period = se->se_dtimperiod; 690 vap->iv_dtim_count = 0; 691 692 /* NB: must be after ni_chan is setup */ 693 ieee80211_setup_rates(ni, se->se_rates, se->se_xrates, 694 IEEE80211_F_DOSORT); 695 696 return ieee80211_sta_join1(ieee80211_ref_node(ni)); 697} 698 699/* 700 * Leave the specified IBSS/BSS network. The node is assumed to 701 * be passed in with a held reference. 702 */ 703void 704ieee80211_sta_leave(struct ieee80211_node *ni) 705{ 706 struct ieee80211com *ic = ni->ni_ic; 707 708 ic->ic_node_cleanup(ni); 709 ieee80211_notify_node_leave(ni); 710} 711 712/* 713 * Send a deauthenticate frame and drop the station. 714 */ 715void 716ieee80211_node_deauth(struct ieee80211_node *ni, int reason) 717{ 718 /* NB: bump the refcnt to be sure temporay nodes are not reclaimed */ 719 ieee80211_ref_node(ni); 720 if (ni->ni_associd != 0) 721 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH, reason); 722 ieee80211_node_leave(ni); 723 ieee80211_free_node(ni); 724} 725 726static struct ieee80211_node * 727node_alloc(struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 728{ 729 struct ieee80211_node *ni; 730 731 MALLOC(ni, struct ieee80211_node *, sizeof(struct ieee80211_node), 732 M_80211_NODE, M_NOWAIT | M_ZERO); 733 return ni; 734} 735 736/* 737 * Initialize an ie blob with the specified data. If previous 738 * data exists re-use the data block. As a side effect we clear 739 * all references to specific ie's; the caller is required to 740 * recalculate them. 741 */ 742int 743ieee80211_ies_init(struct ieee80211_ies *ies, const uint8_t *data, int len) 744{ 745 /* NB: assumes data+len are the last fields */ 746 memset(ies, 0, offsetof(struct ieee80211_ies, data)); 747 if (ies->data != NULL && ies->len != len) { 748 /* data size changed */ 749 FREE(ies->data, M_80211_NODE_IE); 750 ies->data = NULL; 751 } 752 if (ies->data == NULL) { 753 MALLOC(ies->data, uint8_t *, len, M_80211_NODE_IE, M_NOWAIT); 754 if (ies->data == NULL) { 755 ies->len = 0; 756 /* NB: pointers have already been zero'd above */ 757 return 0; 758 } 759 } 760 memcpy(ies->data, data, len); 761 ies->len = len; 762 return 1; 763} 764 765/* 766 * Reclaim storage for an ie blob. 767 */ 768void 769ieee80211_ies_cleanup(struct ieee80211_ies *ies) 770{ 771 if (ies->data != NULL) 772 FREE(ies->data, M_80211_NODE_IE); 773} 774 775/* 776 * Expand an ie blob data contents and to fillin individual 777 * ie pointers. The data blob is assumed to be well-formed; 778 * we don't do any validity checking of ie lengths. 779 */ 780void 781ieee80211_ies_expand(struct ieee80211_ies *ies) 782{ 783 uint8_t *ie; 784 int ielen; 785 786 ie = ies->data; 787 ielen = ies->len; 788 while (ielen > 0) { 789 switch (ie[0]) { 790 case IEEE80211_ELEMID_VENDOR: 791 if (iswpaoui(ie)) 792 ies->wpa_ie = ie; 793 else if (iswmeoui(ie)) 794 ies->wme_ie = ie; 795 else if (isatherosoui(ie)) 796 ies->ath_ie = ie; 797 break; 798 case IEEE80211_ELEMID_RSN: 799 ies->rsn_ie = ie; 800 break; 801 case IEEE80211_ELEMID_HTCAP: 802 ies->htcap_ie = ie; 803 break; 804 } 805 ielen -= 2 + ie[1]; 806 ie += 2 + ie[1]; 807 } 808} 809 810/* 811 * Reclaim any resources in a node and reset any critical 812 * state. Typically nodes are free'd immediately after, 813 * but in some cases the storage may be reused so we need 814 * to insure consistent state (should probably fix that). 815 */ 816static void 817node_cleanup(struct ieee80211_node *ni) 818{ 819#define N(a) (sizeof(a)/sizeof(a[0])) 820 struct ieee80211vap *vap = ni->ni_vap; 821 int i; 822 823 /* NB: preserve ni_table */ 824 if (ni->ni_flags & IEEE80211_NODE_PWR_MGT) { 825 if (vap->iv_opmode != IEEE80211_M_STA) 826 vap->iv_ps_sta--; 827 ni->ni_flags &= ~IEEE80211_NODE_PWR_MGT; 828 IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni, 829 "power save mode off, %u sta's in ps mode", vap->iv_ps_sta); 830 } 831 /* 832 * Cleanup any HT-related state. 833 */ 834 if (ni->ni_flags & IEEE80211_NODE_HT) 835 ieee80211_ht_node_cleanup(ni); 836 /* 837 * Clear AREF flag that marks the authorization refcnt bump 838 * has happened. This is probably not needed as the node 839 * should always be removed from the table so not found but 840 * do it just in case. 841 */ 842 ni->ni_flags &= ~IEEE80211_NODE_AREF; 843 844 /* 845 * Drain power save queue and, if needed, clear TIM. 846 */ 847 if (ieee80211_node_saveq_drain(ni) != 0 && vap->iv_set_tim != NULL) 848 vap->iv_set_tim(ni, 0); 849 850 ni->ni_associd = 0; 851 if (ni->ni_challenge != NULL) { 852 FREE(ni->ni_challenge, M_80211_NODE); 853 ni->ni_challenge = NULL; 854 } 855 /* 856 * Preserve SSID, WPA, and WME ie's so the bss node is 857 * reusable during a re-auth/re-assoc state transition. 858 * If we remove these data they will not be recreated 859 * because they come from a probe-response or beacon frame 860 * which cannot be expected prior to the association-response. 861 * This should not be an issue when operating in other modes 862 * as stations leaving always go through a full state transition 863 * which will rebuild this state. 864 * 865 * XXX does this leave us open to inheriting old state? 866 */ 867 for (i = 0; i < N(ni->ni_rxfrag); i++) 868 if (ni->ni_rxfrag[i] != NULL) { 869 m_freem(ni->ni_rxfrag[i]); 870 ni->ni_rxfrag[i] = NULL; 871 } 872 /* 873 * Must be careful here to remove any key map entry w/o a LOR. 874 */ 875 ieee80211_node_delucastkey(ni); 876#undef N 877} 878 879static void 880node_free(struct ieee80211_node *ni) 881{ 882 struct ieee80211com *ic = ni->ni_ic; 883 884 ic->ic_node_cleanup(ni); 885 ieee80211_ies_cleanup(&ni->ni_ies); 886 IEEE80211_NODE_SAVEQ_DESTROY(ni); 887 IEEE80211_NODE_WDSQ_DESTROY(ni); 888 FREE(ni, M_80211_NODE); 889} 890 891static void 892node_age(struct ieee80211_node *ni) 893{ 894 struct ieee80211vap *vap = ni->ni_vap; 895#if 0 896 IEEE80211_NODE_LOCK_ASSERT(&ic->ic_sta); 897#endif 898 /* 899 * Age frames on the power save queue. 900 */ 901 if (ieee80211_node_saveq_age(ni) != 0 && 902 IEEE80211_NODE_SAVEQ_QLEN(ni) == 0 && 903 vap->iv_set_tim != NULL) 904 vap->iv_set_tim(ni, 0); 905 /* 906 * Age frames on the wds pending queue. 907 */ 908 if (IEEE80211_NODE_WDSQ_QLEN(ni) != 0) 909 ieee80211_node_wdsq_age(ni); 910 /* 911 * Age out HT resources (e.g. frames on the 912 * A-MPDU reorder queues). 913 */ 914 if (ni->ni_associd != 0 && (ni->ni_flags & IEEE80211_NODE_HT)) 915 ieee80211_ht_node_age(ni); 916} 917 918static int8_t 919node_getrssi(const struct ieee80211_node *ni) 920{ 921 uint32_t avgrssi = ni->ni_avgrssi; 922 int32_t rssi; 923 924 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) 925 return 0; 926 rssi = IEEE80211_RSSI_GET(avgrssi); 927 return rssi < 0 ? 0 : rssi > 127 ? 127 : rssi; 928} 929 930static void 931node_getsignal(const struct ieee80211_node *ni, int8_t *rssi, int8_t *noise) 932{ 933 *rssi = node_getrssi(ni); 934 *noise = ni->ni_noise; 935} 936 937static void 938node_getmimoinfo(const struct ieee80211_node *ni, 939 struct ieee80211_mimo_info *info) 940{ 941 /* XXX zero data? */ 942} 943 944struct ieee80211_node * 945ieee80211_alloc_node(struct ieee80211_node_table *nt, 946 struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 947{ 948 struct ieee80211com *ic = nt->nt_ic; 949 struct ieee80211_node *ni; 950 int hash; 951 952 ni = ic->ic_node_alloc(vap, macaddr); 953 if (ni == NULL) { 954 vap->iv_stats.is_rx_nodealloc++; 955 return NULL; 956 } 957 958 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 959 "%s %p<%s> in %s table\n", __func__, ni, 960 ether_sprintf(macaddr), nt->nt_name); 961 962 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 963 hash = IEEE80211_NODE_HASH(macaddr); 964 ieee80211_node_initref(ni); /* mark referenced */ 965 ni->ni_chan = IEEE80211_CHAN_ANYC; 966 ni->ni_authmode = IEEE80211_AUTH_OPEN; 967 ni->ni_txpower = ic->ic_txpowlimit; /* max power */ 968 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE); 969 ni->ni_avgrssi = IEEE80211_RSSI_DUMMY_MARKER; 970 ni->ni_inact_reload = nt->nt_inact_init; 971 ni->ni_inact = ni->ni_inact_reload; 972 ni->ni_ath_defkeyix = 0x7fff; 973 IEEE80211_NODE_SAVEQ_INIT(ni, "unknown"); 974 IEEE80211_NODE_WDSQ_INIT(ni, "unknown"); 975 976 IEEE80211_NODE_LOCK(nt); 977 TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list); 978 LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash); 979 ni->ni_table = nt; 980 ni->ni_vap = vap; 981 ni->ni_ic = ic; 982 IEEE80211_NODE_UNLOCK(nt); 983 984 return ni; 985} 986 987/* 988 * Craft a temporary node suitable for sending a management frame 989 * to the specified station. We craft only as much state as we 990 * need to do the work since the node will be immediately reclaimed 991 * once the send completes. 992 */ 993struct ieee80211_node * 994ieee80211_tmp_node(struct ieee80211vap *vap, 995 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 996{ 997 struct ieee80211com *ic = vap->iv_ic; 998 struct ieee80211_node *ni; 999 1000 ni = ic->ic_node_alloc(vap, macaddr); 1001 if (ni != NULL) { 1002 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1003 "%s %p<%s>\n", __func__, ni, ether_sprintf(macaddr)); 1004 1005 ni->ni_table = NULL; /* NB: pedantic */ 1006 ni->ni_ic = ic; /* NB: needed to set channel */ 1007 ni->ni_vap = vap; 1008 1009 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1010 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_bss->ni_bssid); 1011 ieee80211_node_initref(ni); /* mark referenced */ 1012 /* NB: required by ieee80211_fix_rate */ 1013 ieee80211_node_set_chan(ni, vap->iv_bss->ni_chan); 1014 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, 1015 IEEE80211_KEYIX_NONE); 1016 /* XXX optimize away */ 1017 IEEE80211_NODE_SAVEQ_INIT(ni, "unknown"); 1018 IEEE80211_NODE_WDSQ_INIT(ni, "unknown"); 1019 } else { 1020 /* XXX msg */ 1021 vap->iv_stats.is_rx_nodealloc++; 1022 } 1023 return ni; 1024} 1025 1026struct ieee80211_node * 1027ieee80211_dup_bss(struct ieee80211vap *vap, 1028 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1029{ 1030 struct ieee80211com *ic = vap->iv_ic; 1031 struct ieee80211_node *ni; 1032 1033 ni = ieee80211_alloc_node(&ic->ic_sta, vap, macaddr); 1034 if (ni != NULL) { 1035 /* 1036 * Inherit from iv_bss. 1037 */ 1038 ni->ni_authmode = vap->iv_bss->ni_authmode; 1039 ni->ni_vlan = vap->iv_bss->ni_vlan; /* XXX?? */ 1040 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_bss->ni_bssid); 1041 ieee80211_node_set_chan(ni, vap->iv_bss->ni_chan); 1042 } 1043 return ni; 1044} 1045 1046/* 1047 * Create a bss node for a legacy WDS vap. The far end does 1048 * not associate so we just create create a new node and 1049 * simulate an association. The caller is responsible for 1050 * installing the node as the bss node and handling any further 1051 * setup work like authorizing the port. 1052 */ 1053struct ieee80211_node * 1054ieee80211_node_create_wds(struct ieee80211vap *vap, 1055 const uint8_t bssid[IEEE80211_ADDR_LEN], struct ieee80211_channel *chan) 1056{ 1057 struct ieee80211com *ic = vap->iv_ic; 1058 struct ieee80211_node *ni; 1059 1060 /* XXX check if node already in sta table? */ 1061 ni = ieee80211_alloc_node(&ic->ic_sta, vap, bssid); 1062 if (ni != NULL) { 1063 ni->ni_wdsvap = vap; 1064 IEEE80211_ADDR_COPY(ni->ni_bssid, bssid); 1065 /* 1066 * Inherit any manually configured settings. 1067 */ 1068 ni->ni_authmode = vap->iv_bss->ni_authmode; 1069 ni->ni_vlan = vap->iv_bss->ni_vlan; 1070 ieee80211_node_set_chan(ni, chan); 1071 /* NB: propagate ssid so available to WPA supplicant */ 1072 ni->ni_esslen = vap->iv_des_ssid[0].len; 1073 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen); 1074 /* NB: no associd for peer */ 1075 /* 1076 * There are no management frames to use to 1077 * discover neighbor capabilities, so blindly 1078 * propagate the local configuration. 1079 */ 1080 if (vap->iv_flags & IEEE80211_F_WME) 1081 ni->ni_flags |= IEEE80211_NODE_QOS; 1082 if (vap->iv_flags & IEEE80211_F_FF) 1083 ni->ni_flags |= IEEE80211_NODE_FF; 1084 if ((ic->ic_htcaps & IEEE80211_HTC_HT) && 1085 (vap->iv_flags_ext & IEEE80211_FEXT_HT)) { 1086 /* 1087 * Device is HT-capable and HT is enabled for 1088 * the vap; setup HT operation. On return 1089 * ni_chan will be adjusted to an HT channel. 1090 */ 1091 ieee80211_ht_wds_init(ni); 1092 } else { 1093 struct ieee80211_channel *c = ni->ni_chan; 1094 /* 1095 * Force a legacy channel to be used. 1096 */ 1097 c = ieee80211_find_channel(ic, 1098 c->ic_freq, c->ic_flags &~ IEEE80211_CHAN_HT); 1099 KASSERT(c != NULL, ("no legacy channel, %u/%x", 1100 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags)); 1101 ni->ni_chan = c; 1102 } 1103 } 1104 return ni; 1105} 1106 1107struct ieee80211_node * 1108#ifdef IEEE80211_DEBUG_REFCNT 1109ieee80211_find_node_locked_debug(struct ieee80211_node_table *nt, 1110 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1111#else 1112ieee80211_find_node_locked(struct ieee80211_node_table *nt, 1113 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1114#endif 1115{ 1116 struct ieee80211_node *ni; 1117 int hash; 1118 1119 IEEE80211_NODE_LOCK_ASSERT(nt); 1120 1121 hash = IEEE80211_NODE_HASH(macaddr); 1122 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1123 if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1124 ieee80211_ref_node(ni); /* mark referenced */ 1125#ifdef IEEE80211_DEBUG_REFCNT 1126 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1127 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1128 func, line, 1129 ni, ether_sprintf(ni->ni_macaddr), 1130 ieee80211_node_refcnt(ni)); 1131#endif 1132 return ni; 1133 } 1134 } 1135 return NULL; 1136} 1137 1138struct ieee80211_node * 1139#ifdef IEEE80211_DEBUG_REFCNT 1140ieee80211_find_node_debug(struct ieee80211_node_table *nt, 1141 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1142#else 1143ieee80211_find_node(struct ieee80211_node_table *nt, 1144 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1145#endif 1146{ 1147 struct ieee80211_node *ni; 1148 1149 IEEE80211_NODE_LOCK(nt); 1150 ni = ieee80211_find_node_locked(nt, macaddr); 1151 IEEE80211_NODE_UNLOCK(nt); 1152 return ni; 1153} 1154 1155struct ieee80211_node * 1156#ifdef IEEE80211_DEBUG_REFCNT 1157ieee80211_find_vap_node_locked_debug(struct ieee80211_node_table *nt, 1158 const struct ieee80211vap *vap, 1159 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1160#else 1161ieee80211_find_vap_node_locked(struct ieee80211_node_table *nt, 1162 const struct ieee80211vap *vap, 1163 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1164#endif 1165{ 1166 struct ieee80211_node *ni; 1167 int hash; 1168 1169 IEEE80211_NODE_LOCK_ASSERT(nt); 1170 1171 hash = IEEE80211_NODE_HASH(macaddr); 1172 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1173 if (ni->ni_vap == vap && 1174 IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1175 ieee80211_ref_node(ni); /* mark referenced */ 1176#ifdef IEEE80211_DEBUG_REFCNT 1177 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1178 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1179 func, line, 1180 ni, ether_sprintf(ni->ni_macaddr), 1181 ieee80211_node_refcnt(ni)); 1182#endif 1183 return ni; 1184 } 1185 } 1186 return NULL; 1187} 1188 1189struct ieee80211_node * 1190#ifdef IEEE80211_DEBUG_REFCNT 1191ieee80211_find_vap_node_debug(struct ieee80211_node_table *nt, 1192 const struct ieee80211vap *vap, 1193 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1194#else 1195ieee80211_find_vap_node(struct ieee80211_node_table *nt, 1196 const struct ieee80211vap *vap, 1197 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1198#endif 1199{ 1200 struct ieee80211_node *ni; 1201 1202 IEEE80211_NODE_LOCK(nt); 1203 ni = ieee80211_find_vap_node_locked(nt, vap, macaddr); 1204 IEEE80211_NODE_UNLOCK(nt); 1205 return ni; 1206} 1207 1208/* 1209 * Fake up a node; this handles node discovery in adhoc mode. 1210 * Note that for the driver's benefit we we treat this like 1211 * an association so the driver has an opportunity to setup 1212 * it's private state. 1213 */ 1214struct ieee80211_node * 1215ieee80211_fakeup_adhoc_node(struct ieee80211vap *vap, 1216 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1217{ 1218 struct ieee80211_node *ni; 1219 1220 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1221 "%s: mac<%s>\n", __func__, ether_sprintf(macaddr)); 1222 ni = ieee80211_dup_bss(vap, macaddr); 1223 if (ni != NULL) { 1224 struct ieee80211com *ic = vap->iv_ic; 1225 1226 /* XXX no rate negotiation; just dup */ 1227 ni->ni_rates = vap->iv_bss->ni_rates; 1228 if (vap->iv_opmode == IEEE80211_M_AHDEMO) { 1229 /* 1230 * In adhoc demo mode there are no management 1231 * frames to use to discover neighbor capabilities, 1232 * so blindly propagate the local configuration 1233 * so we can do interesting things (e.g. use 1234 * WME to disable ACK's). 1235 */ 1236 if (vap->iv_flags & IEEE80211_F_WME) 1237 ni->ni_flags |= IEEE80211_NODE_QOS; 1238 if (vap->iv_flags & IEEE80211_F_FF) 1239 ni->ni_flags |= IEEE80211_NODE_FF; 1240 } 1241 if (ic->ic_newassoc != NULL) 1242 ic->ic_newassoc(ni, 1); 1243 /* XXX not right for 802.1x/WPA */ 1244 ieee80211_node_authorize(ni); 1245 } 1246 return ni; 1247} 1248 1249void 1250ieee80211_init_neighbor(struct ieee80211_node *ni, 1251 const struct ieee80211_frame *wh, 1252 const struct ieee80211_scanparams *sp) 1253{ 1254 ni->ni_esslen = sp->ssid[1]; 1255 memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]); 1256 IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3); 1257 memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp)); 1258 ni->ni_intval = sp->bintval; 1259 ni->ni_capinfo = sp->capinfo; 1260 ni->ni_chan = ni->ni_ic->ic_curchan; 1261 ni->ni_fhdwell = sp->fhdwell; 1262 ni->ni_fhindex = sp->fhindex; 1263 ni->ni_erp = sp->erp; 1264 ni->ni_timoff = sp->timoff; 1265 1266 if (ieee80211_ies_init(&ni->ni_ies, sp->ies, sp->ies_len)) { 1267 ieee80211_ies_expand(&ni->ni_ies); 1268 if (ni->ni_ies.ath_ie != NULL) 1269 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 1270 } 1271 1272 /* NB: must be after ni_chan is setup */ 1273 ieee80211_setup_rates(ni, sp->rates, sp->xrates, 1274 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 1275 IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 1276} 1277 1278/* 1279 * Do node discovery in adhoc mode on receipt of a beacon 1280 * or probe response frame. Note that for the driver's 1281 * benefit we we treat this like an association so the 1282 * driver has an opportunity to setup it's private state. 1283 */ 1284struct ieee80211_node * 1285ieee80211_add_neighbor(struct ieee80211vap *vap, 1286 const struct ieee80211_frame *wh, 1287 const struct ieee80211_scanparams *sp) 1288{ 1289 struct ieee80211_node *ni; 1290 1291 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1292 "%s: mac<%s>\n", __func__, ether_sprintf(wh->i_addr2)); 1293 ni = ieee80211_dup_bss(vap, wh->i_addr2);/* XXX alloc_node? */ 1294 if (ni != NULL) { 1295 struct ieee80211com *ic = vap->iv_ic; 1296 1297 ieee80211_init_neighbor(ni, wh, sp); 1298 if (ic->ic_newassoc != NULL) 1299 ic->ic_newassoc(ni, 1); 1300 /* XXX not right for 802.1x/WPA */ 1301 ieee80211_node_authorize(ni); 1302 } 1303 return ni; 1304} 1305 1306#define IS_CTL(wh) \ 1307 ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) == IEEE80211_FC0_TYPE_CTL) 1308#define IS_PSPOLL(wh) \ 1309 ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == IEEE80211_FC0_SUBTYPE_PS_POLL) 1310#define IS_BAR(wh) \ 1311 ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == IEEE80211_FC0_SUBTYPE_BAR) 1312#define IS_PROBEREQ(wh) \ 1313 ((wh->i_fc[0] & (IEEE80211_FC0_TYPE_MASK|IEEE80211_FC0_SUBTYPE_MASK)) \ 1314 == (IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ)) 1315#define IS_BCAST_PROBEREQ(wh) \ 1316 (IS_PROBEREQ(wh) && IEEE80211_IS_MULTICAST( \ 1317 ((const struct ieee80211_frame *)(wh))->i_addr3)) 1318 1319static __inline struct ieee80211_node * 1320_find_rxnode(struct ieee80211_node_table *nt, 1321 const struct ieee80211_frame_min *wh) 1322{ 1323 /* XXX 4-address frames? */ 1324 if (IS_CTL(wh) && !IS_PSPOLL(wh) && !IS_BAR(wh) /*&& !IS_RTS(ah)*/) 1325 return ieee80211_find_node_locked(nt, wh->i_addr1); 1326 if (IS_BCAST_PROBEREQ(wh)) 1327 return NULL; /* spam bcast probe req to all vap's */ 1328 return ieee80211_find_node_locked(nt, wh->i_addr2); 1329} 1330 1331/* 1332 * Locate the node for sender, track state, and then pass the 1333 * (referenced) node up to the 802.11 layer for its use. Note 1334 * we can return NULL if the sender is not in the table. 1335 */ 1336struct ieee80211_node * 1337#ifdef IEEE80211_DEBUG_REFCNT 1338ieee80211_find_rxnode_debug(struct ieee80211com *ic, 1339 const struct ieee80211_frame_min *wh, const char *func, int line) 1340#else 1341ieee80211_find_rxnode(struct ieee80211com *ic, 1342 const struct ieee80211_frame_min *wh) 1343#endif 1344{ 1345 struct ieee80211_node_table *nt; 1346 struct ieee80211_node *ni; 1347 1348 nt = &ic->ic_sta; 1349 IEEE80211_NODE_LOCK(nt); 1350 ni = _find_rxnode(nt, wh); 1351 IEEE80211_NODE_UNLOCK(nt); 1352 1353 return ni; 1354} 1355 1356/* 1357 * Like ieee80211_find_rxnode but use the supplied h/w 1358 * key index as a hint to locate the node in the key 1359 * mapping table. If an entry is present at the key 1360 * index we return it; otherwise do a normal lookup and 1361 * update the mapping table if the station has a unicast 1362 * key assigned to it. 1363 */ 1364struct ieee80211_node * 1365#ifdef IEEE80211_DEBUG_REFCNT 1366ieee80211_find_rxnode_withkey_debug(struct ieee80211com *ic, 1367 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix, 1368 const char *func, int line) 1369#else 1370ieee80211_find_rxnode_withkey(struct ieee80211com *ic, 1371 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix) 1372#endif 1373{ 1374 struct ieee80211_node_table *nt; 1375 struct ieee80211_node *ni; 1376 1377 nt = &ic->ic_sta; 1378 IEEE80211_NODE_LOCK(nt); 1379 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) 1380 ni = nt->nt_keyixmap[keyix]; 1381 else 1382 ni = NULL; 1383 if (ni == NULL) { 1384 ni = _find_rxnode(nt, wh); 1385 if (ni != NULL && nt->nt_keyixmap != NULL) { 1386 /* 1387 * If the station has a unicast key cache slot 1388 * assigned update the key->node mapping table. 1389 */ 1390 keyix = ni->ni_ucastkey.wk_rxkeyix; 1391 /* XXX can keyixmap[keyix] != NULL? */ 1392 if (keyix < nt->nt_keyixmax && 1393 nt->nt_keyixmap[keyix] == NULL) { 1394 IEEE80211_DPRINTF(ni->ni_vap, 1395 IEEE80211_MSG_NODE, 1396 "%s: add key map entry %p<%s> refcnt %d\n", 1397 __func__, ni, ether_sprintf(ni->ni_macaddr), 1398 ieee80211_node_refcnt(ni)+1); 1399 nt->nt_keyixmap[keyix] = ieee80211_ref_node(ni); 1400 } 1401 } 1402 } else { 1403 if (IS_BCAST_PROBEREQ(wh)) 1404 ni = NULL; /* spam bcast probe req to all vap's */ 1405 else 1406 ieee80211_ref_node(ni); 1407 } 1408 IEEE80211_NODE_UNLOCK(nt); 1409 1410 return ni; 1411} 1412#undef IS_BCAST_PROBEREQ 1413#undef IS_PROBEREQ 1414#undef IS_BAR 1415#undef IS_PSPOLL 1416#undef IS_CTL 1417 1418/* 1419 * Return a reference to the appropriate node for sending 1420 * a data frame. This handles node discovery in adhoc networks. 1421 */ 1422struct ieee80211_node * 1423#ifdef IEEE80211_DEBUG_REFCNT 1424ieee80211_find_txnode_debug(struct ieee80211vap *vap, 1425 const uint8_t macaddr[IEEE80211_ADDR_LEN], 1426 const char *func, int line) 1427#else 1428ieee80211_find_txnode(struct ieee80211vap *vap, 1429 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1430#endif 1431{ 1432 struct ieee80211_node_table *nt = &vap->iv_ic->ic_sta; 1433 struct ieee80211_node *ni; 1434 1435 /* 1436 * The destination address should be in the node table 1437 * unless this is a multicast/broadcast frame. We can 1438 * also optimize station mode operation, all frames go 1439 * to the bss node. 1440 */ 1441 /* XXX can't hold lock across dup_bss 'cuz of recursive locking */ 1442 IEEE80211_NODE_LOCK(nt); 1443 if (vap->iv_opmode == IEEE80211_M_STA || 1444 vap->iv_opmode == IEEE80211_M_WDS || 1445 IEEE80211_IS_MULTICAST(macaddr)) 1446 ni = ieee80211_ref_node(vap->iv_bss); 1447 else { 1448 ni = ieee80211_find_node_locked(nt, macaddr); 1449 if (vap->iv_opmode == IEEE80211_M_HOSTAP && 1450 (ni != NULL && ni->ni_associd == 0)) { 1451 /* 1452 * Station is not associated; don't permit the 1453 * data frame to be sent by returning NULL. This 1454 * is kinda a kludge but the least intrusive way 1455 * to add this check into all drivers. 1456 */ 1457 ieee80211_unref_node(&ni); /* NB: null's ni */ 1458 } 1459 } 1460 IEEE80211_NODE_UNLOCK(nt); 1461 1462 if (ni == NULL) { 1463 if (vap->iv_opmode == IEEE80211_M_IBSS || 1464 vap->iv_opmode == IEEE80211_M_AHDEMO) { 1465 /* 1466 * In adhoc mode cons up a node for the destination. 1467 * Note that we need an additional reference for the 1468 * caller to be consistent with 1469 * ieee80211_find_node_locked. 1470 */ 1471 ni = ieee80211_fakeup_adhoc_node(vap, macaddr); 1472 if (ni != NULL) 1473 (void) ieee80211_ref_node(ni); 1474 } else { 1475 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, macaddr, 1476 "no node, discard frame (%s)", __func__); 1477 vap->iv_stats.is_tx_nonode++; 1478 } 1479 } 1480 return ni; 1481} 1482 1483static void 1484_ieee80211_free_node(struct ieee80211_node *ni) 1485{ 1486 struct ieee80211_node_table *nt = ni->ni_table; 1487 1488 /* 1489 * NB: careful about referencing the vap as it may be 1490 * gone if the last reference was held by a driver. 1491 * We know the com will always be present so it's safe 1492 * to use ni_ic below to reclaim resources. 1493 */ 1494#if 0 1495 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1496 "%s %p<%s> in %s table\n", __func__, ni, 1497 ether_sprintf(ni->ni_macaddr), 1498 nt != NULL ? nt->nt_name : "<gone>"); 1499#endif 1500 if (ni->ni_associd != 0) { 1501 struct ieee80211vap *vap = ni->ni_vap; 1502 if (vap->iv_aid_bitmap != NULL) 1503 IEEE80211_AID_CLR(vap, ni->ni_associd); 1504 } 1505 if (nt != NULL) { 1506 TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1507 LIST_REMOVE(ni, ni_hash); 1508 } 1509 ni->ni_ic->ic_node_free(ni); 1510} 1511 1512void 1513#ifdef IEEE80211_DEBUG_REFCNT 1514ieee80211_free_node_debug(struct ieee80211_node *ni, const char *func, int line) 1515#else 1516ieee80211_free_node(struct ieee80211_node *ni) 1517#endif 1518{ 1519 struct ieee80211_node_table *nt = ni->ni_table; 1520 1521#ifdef IEEE80211_DEBUG_REFCNT 1522 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1523 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni, 1524 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1); 1525#endif 1526 if (nt != NULL) { 1527 IEEE80211_NODE_LOCK(nt); 1528 if (ieee80211_node_dectestref(ni)) { 1529 /* 1530 * Last reference, reclaim state. 1531 */ 1532 _ieee80211_free_node(ni); 1533 } else if (ieee80211_node_refcnt(ni) == 1 && 1534 nt->nt_keyixmap != NULL) { 1535 ieee80211_keyix keyix; 1536 /* 1537 * Check for a last reference in the key mapping table. 1538 */ 1539 keyix = ni->ni_ucastkey.wk_rxkeyix; 1540 if (keyix < nt->nt_keyixmax && 1541 nt->nt_keyixmap[keyix] == ni) { 1542 IEEE80211_DPRINTF(ni->ni_vap, 1543 IEEE80211_MSG_NODE, 1544 "%s: %p<%s> clear key map entry", __func__, 1545 ni, ether_sprintf(ni->ni_macaddr)); 1546 nt->nt_keyixmap[keyix] = NULL; 1547 ieee80211_node_decref(ni); /* XXX needed? */ 1548 _ieee80211_free_node(ni); 1549 } 1550 } 1551 IEEE80211_NODE_UNLOCK(nt); 1552 } else { 1553 if (ieee80211_node_dectestref(ni)) 1554 _ieee80211_free_node(ni); 1555 } 1556} 1557 1558/* 1559 * Reclaim a unicast key and clear any key cache state. 1560 */ 1561int 1562ieee80211_node_delucastkey(struct ieee80211_node *ni) 1563{ 1564 struct ieee80211com *ic = ni->ni_ic; 1565 struct ieee80211_node_table *nt = &ic->ic_sta; 1566 struct ieee80211_node *nikey; 1567 ieee80211_keyix keyix; 1568 int isowned, status; 1569 1570 /* 1571 * NB: We must beware of LOR here; deleting the key 1572 * can cause the crypto layer to block traffic updates 1573 * which can generate a LOR against the node table lock; 1574 * grab it here and stash the key index for our use below. 1575 * 1576 * Must also beware of recursion on the node table lock. 1577 * When called from node_cleanup we may already have 1578 * the node table lock held. Unfortunately there's no 1579 * way to separate out this path so we must do this 1580 * conditionally. 1581 */ 1582 isowned = IEEE80211_NODE_IS_LOCKED(nt); 1583 if (!isowned) 1584 IEEE80211_NODE_LOCK(nt); 1585 nikey = NULL; 1586 status = 1; /* NB: success */ 1587 if (!IEEE80211_KEY_UNDEFINED(&ni->ni_ucastkey)) { 1588 keyix = ni->ni_ucastkey.wk_rxkeyix; 1589 status = ieee80211_crypto_delkey(ni->ni_vap, &ni->ni_ucastkey); 1590 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) { 1591 nikey = nt->nt_keyixmap[keyix]; 1592 nt->nt_keyixmap[keyix] = NULL;; 1593 } 1594 } 1595 if (!isowned) 1596 IEEE80211_NODE_UNLOCK(nt); 1597 1598 if (nikey != NULL) { 1599 KASSERT(nikey == ni, 1600 ("key map out of sync, ni %p nikey %p", ni, nikey)); 1601 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1602 "%s: delete key map entry %p<%s> refcnt %d\n", 1603 __func__, ni, ether_sprintf(ni->ni_macaddr), 1604 ieee80211_node_refcnt(ni)-1); 1605 ieee80211_free_node(ni); 1606 } 1607 return status; 1608} 1609 1610/* 1611 * Reclaim a node. If this is the last reference count then 1612 * do the normal free work. Otherwise remove it from the node 1613 * table and mark it gone by clearing the back-reference. 1614 */ 1615static void 1616node_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 1617{ 1618 ieee80211_keyix keyix; 1619 1620 IEEE80211_NODE_LOCK_ASSERT(nt); 1621 1622 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1623 "%s: remove %p<%s> from %s table, refcnt %d\n", 1624 __func__, ni, ether_sprintf(ni->ni_macaddr), 1625 nt->nt_name, ieee80211_node_refcnt(ni)-1); 1626 /* 1627 * Clear any entry in the unicast key mapping table. 1628 * We need to do it here so rx lookups don't find it 1629 * in the mapping table even if it's not in the hash 1630 * table. We cannot depend on the mapping table entry 1631 * being cleared because the node may not be free'd. 1632 */ 1633 keyix = ni->ni_ucastkey.wk_rxkeyix; 1634 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax && 1635 nt->nt_keyixmap[keyix] == ni) { 1636 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1637 "%s: %p<%s> clear key map entry\n", 1638 __func__, ni, ether_sprintf(ni->ni_macaddr)); 1639 nt->nt_keyixmap[keyix] = NULL; 1640 ieee80211_node_decref(ni); /* NB: don't need free */ 1641 } 1642 if (!ieee80211_node_dectestref(ni)) { 1643 /* 1644 * Other references are present, just remove the 1645 * node from the table so it cannot be found. When 1646 * the references are dropped storage will be 1647 * reclaimed. 1648 */ 1649 TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1650 LIST_REMOVE(ni, ni_hash); 1651 ni->ni_table = NULL; /* clear reference */ 1652 } else 1653 _ieee80211_free_node(ni); 1654} 1655 1656/* 1657 * Reclaim a (bss) node. Decrement the refcnt and reclaim 1658 * the node if the only other reference to it is in the sta 1659 * table. This is effectively ieee80211_free_node followed 1660 * by node_reclaim when the refcnt is 1 (after the free). 1661 */ 1662static void 1663ieee80211_node_reclaim(struct ieee80211_node *ni) 1664{ 1665 struct ieee80211_node_table *nt = ni->ni_table; 1666 1667 KASSERT(nt != NULL, ("reclaim node not in table")); 1668 1669#ifdef IEEE80211_DEBUG_REFCNT 1670 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1671 "%s %p<%s> refcnt %d\n", __func__, ni, 1672 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1); 1673#endif 1674 IEEE80211_NODE_LOCK(nt); 1675 if (ieee80211_node_dectestref(ni)) { 1676 /* 1677 * Last reference, reclaim state. 1678 */ 1679 _ieee80211_free_node(ni); 1680 nt = NULL; 1681 } else if (ieee80211_node_refcnt(ni) == 1 && 1682 nt->nt_keyixmap != NULL) { 1683 ieee80211_keyix keyix; 1684 /* 1685 * Check for a last reference in the key mapping table. 1686 */ 1687 keyix = ni->ni_ucastkey.wk_rxkeyix; 1688 if (keyix < nt->nt_keyixmax && 1689 nt->nt_keyixmap[keyix] == ni) { 1690 IEEE80211_DPRINTF(ni->ni_vap, 1691 IEEE80211_MSG_NODE, 1692 "%s: %p<%s> clear key map entry", __func__, 1693 ni, ether_sprintf(ni->ni_macaddr)); 1694 nt->nt_keyixmap[keyix] = NULL; 1695 ieee80211_node_decref(ni); /* XXX needed? */ 1696 _ieee80211_free_node(ni); 1697 nt = NULL; 1698 } 1699 } 1700 if (nt != NULL && ieee80211_node_refcnt(ni) == 1) { 1701 /* 1702 * Last reference is in the sta table; complete 1703 * the reclaim. This handles bss nodes being 1704 * recycled: the node has two references, one for 1705 * iv_bss and one for the table. After dropping 1706 * the iv_bss ref above we need to reclaim the sta 1707 * table reference. 1708 */ 1709 ieee80211_node_decref(ni); /* NB: be pendantic */ 1710 _ieee80211_free_node(ni); 1711 } 1712 IEEE80211_NODE_UNLOCK(nt); 1713} 1714 1715/* 1716 * Node table support. 1717 */ 1718 1719static void 1720ieee80211_node_table_init(struct ieee80211com *ic, 1721 struct ieee80211_node_table *nt, 1722 const char *name, int inact, int keyixmax) 1723{ 1724 struct ifnet *ifp = ic->ic_ifp; 1725 1726 nt->nt_ic = ic; 1727 IEEE80211_NODE_LOCK_INIT(nt, ifp->if_xname); 1728 IEEE80211_NODE_ITERATE_LOCK_INIT(nt, ifp->if_xname); 1729 TAILQ_INIT(&nt->nt_node); 1730 nt->nt_name = name; 1731 nt->nt_scangen = 1; 1732 nt->nt_inact_init = inact; 1733 nt->nt_keyixmax = keyixmax; 1734 if (nt->nt_keyixmax > 0) { 1735 MALLOC(nt->nt_keyixmap, struct ieee80211_node **, 1736 keyixmax * sizeof(struct ieee80211_node *), 1737 M_80211_NODE, M_NOWAIT | M_ZERO); 1738 if (nt->nt_keyixmap == NULL) 1739 if_printf(ic->ic_ifp, 1740 "Cannot allocate key index map with %u entries\n", 1741 keyixmax); 1742 } else 1743 nt->nt_keyixmap = NULL; 1744} 1745 1746static void 1747ieee80211_node_table_reset(struct ieee80211_node_table *nt, 1748 struct ieee80211vap *match) 1749{ 1750 struct ieee80211_node *ni, *next; 1751 1752 IEEE80211_NODE_LOCK(nt); 1753 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) { 1754 if (match != NULL && ni->ni_vap != match) 1755 continue; 1756 /* XXX can this happen? if so need's work */ 1757 if (ni->ni_associd != 0) { 1758 struct ieee80211vap *vap = ni->ni_vap; 1759 1760 if (vap->iv_auth->ia_node_leave != NULL) 1761 vap->iv_auth->ia_node_leave(ni); 1762 if (vap->iv_aid_bitmap != NULL) 1763 IEEE80211_AID_CLR(vap, ni->ni_associd); 1764 } 1765 ni->ni_wdsvap = NULL; /* clear reference */ 1766 node_reclaim(nt, ni); 1767 } 1768 if (match != NULL && match->iv_opmode == IEEE80211_M_WDS) { 1769 /* 1770 * Make a separate pass to clear references to this vap 1771 * held by DWDS entries. They will not be matched above 1772 * because ni_vap will point to the ap vap but we still 1773 * need to clear ni_wdsvap when the WDS vap is destroyed 1774 * and/or reset. 1775 */ 1776 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) 1777 if (ni->ni_wdsvap == match) 1778 ni->ni_wdsvap = NULL; 1779 } 1780 IEEE80211_NODE_UNLOCK(nt); 1781} 1782 1783static void 1784ieee80211_node_table_cleanup(struct ieee80211_node_table *nt) 1785{ 1786 ieee80211_node_table_reset(nt, NULL); 1787 if (nt->nt_keyixmap != NULL) { 1788#ifdef DIAGNOSTIC 1789 /* XXX verify all entries are NULL */ 1790 int i; 1791 for (i = 0; i < nt->nt_keyixmax; i++) 1792 if (nt->nt_keyixmap[i] != NULL) 1793 printf("%s: %s[%u] still active\n", __func__, 1794 nt->nt_name, i); 1795#endif 1796 FREE(nt->nt_keyixmap, M_80211_NODE); 1797 nt->nt_keyixmap = NULL; 1798 } 1799 IEEE80211_NODE_ITERATE_LOCK_DESTROY(nt); 1800 IEEE80211_NODE_LOCK_DESTROY(nt); 1801} 1802 1803/* 1804 * Timeout inactive stations and do related housekeeping. 1805 * Note that we cannot hold the node lock while sending a 1806 * frame as this would lead to a LOR. Instead we use a 1807 * generation number to mark nodes that we've scanned and 1808 * drop the lock and restart a scan if we have to time out 1809 * a node. Since we are single-threaded by virtue of 1810 * controlling the inactivity timer we can be sure this will 1811 * process each node only once. 1812 */ 1813static void 1814ieee80211_timeout_stations(struct ieee80211com *ic) 1815{ 1816 struct ieee80211_node_table *nt = &ic->ic_sta; 1817 struct ieee80211vap *vap; 1818 struct ieee80211_node *ni; 1819 int gen = 0; 1820 1821 IEEE80211_NODE_ITERATE_LOCK(nt); 1822 gen = ++nt->nt_scangen; 1823restart: 1824 IEEE80211_NODE_LOCK(nt); 1825 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 1826 if (ni->ni_scangen == gen) /* previously handled */ 1827 continue; 1828 ni->ni_scangen = gen; 1829 /* 1830 * Ignore entries for which have yet to receive an 1831 * authentication frame. These are transient and 1832 * will be reclaimed when the last reference to them 1833 * goes away (when frame xmits complete). 1834 */ 1835 vap = ni->ni_vap; 1836 /* 1837 * Only process stations when in RUN state. This 1838 * insures, for example, that we don't timeout an 1839 * inactive station during CAC. Note that CSA state 1840 * is actually handled in ieee80211_node_timeout as 1841 * it applies to more than timeout processing. 1842 */ 1843 if (vap->iv_state != IEEE80211_S_RUN) 1844 continue; 1845 /* XXX can vap be NULL? */ 1846 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 1847 vap->iv_opmode == IEEE80211_M_STA) && 1848 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 1849 continue; 1850 /* 1851 * Free fragment if not needed anymore 1852 * (last fragment older than 1s). 1853 * XXX doesn't belong here, move to node_age 1854 */ 1855 if (ni->ni_rxfrag[0] != NULL && 1856 ticks > ni->ni_rxfragstamp + hz) { 1857 m_freem(ni->ni_rxfrag[0]); 1858 ni->ni_rxfrag[0] = NULL; 1859 } 1860 if (ni->ni_inact > 0) 1861 ni->ni_inact--; 1862 /* 1863 * Special case ourself; we may be idle for extended periods 1864 * of time and regardless reclaiming our state is wrong. 1865 * XXX run ic_node_age 1866 */ 1867 if (ni == vap->iv_bss) 1868 continue; 1869 if (ni->ni_associd != 0 || 1870 (vap->iv_opmode == IEEE80211_M_IBSS || 1871 vap->iv_opmode == IEEE80211_M_AHDEMO)) { 1872 /* 1873 * Age/drain resources held by the station. 1874 */ 1875 ic->ic_node_age(ni); 1876 /* 1877 * Probe the station before time it out. We 1878 * send a null data frame which may not be 1879 * universally supported by drivers (need it 1880 * for ps-poll support so it should be...). 1881 * 1882 * XXX don't probe the station unless we've 1883 * received a frame from them (and have 1884 * some idea of the rates they are capable 1885 * of); this will get fixed more properly 1886 * soon with better handling of the rate set. 1887 */ 1888 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 1889 (0 < ni->ni_inact && 1890 ni->ni_inact <= vap->iv_inact_probe) && 1891 ni->ni_rates.rs_nrates != 0) { 1892 IEEE80211_NOTE(vap, 1893 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, 1894 ni, "%s", 1895 "probe station due to inactivity"); 1896 /* 1897 * Grab a reference before unlocking the table 1898 * so the node cannot be reclaimed before we 1899 * send the frame. ieee80211_send_nulldata 1900 * understands we've done this and reclaims the 1901 * ref for us as needed. 1902 */ 1903 ieee80211_ref_node(ni); 1904 IEEE80211_NODE_UNLOCK(nt); 1905 ieee80211_send_nulldata(ni); 1906 /* XXX stat? */ 1907 goto restart; 1908 } 1909 } 1910 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 1911 ni->ni_inact <= 0) { 1912 IEEE80211_NOTE(vap, 1913 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, ni, 1914 "station timed out due to inactivity " 1915 "(refcnt %u)", ieee80211_node_refcnt(ni)); 1916 /* 1917 * Send a deauthenticate frame and drop the station. 1918 * This is somewhat complicated due to reference counts 1919 * and locking. At this point a station will typically 1920 * have a reference count of 1. ieee80211_node_leave 1921 * will do a "free" of the node which will drop the 1922 * reference count. But in the meantime a reference 1923 * wil be held by the deauth frame. The actual reclaim 1924 * of the node will happen either after the tx is 1925 * completed or by ieee80211_node_leave. 1926 * 1927 * Separately we must drop the node lock before sending 1928 * in case the driver takes a lock, as this can result 1929 * in a LOR between the node lock and the driver lock. 1930 */ 1931 ieee80211_ref_node(ni); 1932 IEEE80211_NODE_UNLOCK(nt); 1933 if (ni->ni_associd != 0) { 1934 IEEE80211_SEND_MGMT(ni, 1935 IEEE80211_FC0_SUBTYPE_DEAUTH, 1936 IEEE80211_REASON_AUTH_EXPIRE); 1937 } 1938 ieee80211_node_leave(ni); 1939 ieee80211_free_node(ni); 1940 vap->iv_stats.is_node_timeout++; 1941 goto restart; 1942 } 1943 } 1944 IEEE80211_NODE_UNLOCK(nt); 1945 1946 IEEE80211_NODE_ITERATE_UNLOCK(nt); 1947} 1948 1949/* 1950 * Aggressively reclaim resources. This should be used 1951 * only in a critical situation to reclaim mbuf resources. 1952 */ 1953void 1954ieee80211_drain(struct ieee80211com *ic) 1955{ 1956 struct ieee80211_node_table *nt = &ic->ic_sta; 1957 struct ieee80211vap *vap; 1958 struct ieee80211_node *ni; 1959 1960 IEEE80211_NODE_LOCK(nt); 1961 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 1962 /* 1963 * Ignore entries for which have yet to receive an 1964 * authentication frame. These are transient and 1965 * will be reclaimed when the last reference to them 1966 * goes away (when frame xmits complete). 1967 */ 1968 vap = ni->ni_vap; 1969 /* 1970 * Only process stations when in RUN state. This 1971 * insures, for example, that we don't timeout an 1972 * inactive station during CAC. Note that CSA state 1973 * is actually handled in ieee80211_node_timeout as 1974 * it applies to more than timeout processing. 1975 */ 1976 if (vap->iv_state != IEEE80211_S_RUN) 1977 continue; 1978 /* XXX can vap be NULL? */ 1979 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 1980 vap->iv_opmode == IEEE80211_M_STA) && 1981 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 1982 continue; 1983 /* 1984 * Free fragments. 1985 * XXX doesn't belong here, move to node_drain 1986 */ 1987 if (ni->ni_rxfrag[0] != NULL) { 1988 m_freem(ni->ni_rxfrag[0]); 1989 ni->ni_rxfrag[0] = NULL; 1990 } 1991 /* 1992 * Drain resources held by the station. 1993 */ 1994 ic->ic_node_drain(ni); 1995 } 1996 IEEE80211_NODE_UNLOCK(nt); 1997} 1998 1999/* 2000 * Per-ieee80211com inactivity timer callback. 2001 */ 2002void 2003ieee80211_node_timeout(void *arg) 2004{ 2005 struct ieee80211com *ic = arg; 2006 2007 /* 2008 * Defer timeout processing if a channel switch is pending. 2009 * We typically need to be mute so not doing things that 2010 * might generate frames is good to handle in one place. 2011 * Supressing the station timeout processing may extend the 2012 * lifetime of inactive stations (by not decrementing their 2013 * idle counters) but this should be ok unless the CSA is 2014 * active for an unusually long time. 2015 */ 2016 if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) { 2017 ieee80211_scan_timeout(ic); 2018 ieee80211_timeout_stations(ic); 2019 2020 IEEE80211_LOCK(ic); 2021 ieee80211_erp_timeout(ic); 2022 ieee80211_ht_timeout(ic); 2023 IEEE80211_UNLOCK(ic); 2024 } 2025 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, 2026 ieee80211_node_timeout, ic); 2027} 2028 2029void 2030ieee80211_iterate_nodes(struct ieee80211_node_table *nt, 2031 ieee80211_iter_func *f, void *arg) 2032{ 2033 struct ieee80211_node *ni; 2034 u_int gen; 2035 2036 IEEE80211_NODE_ITERATE_LOCK(nt); 2037 gen = ++nt->nt_scangen; 2038restart: 2039 IEEE80211_NODE_LOCK(nt); 2040 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2041 if (ni->ni_scangen != gen) { 2042 ni->ni_scangen = gen; 2043 (void) ieee80211_ref_node(ni); 2044 IEEE80211_NODE_UNLOCK(nt); 2045 (*f)(arg, ni); 2046 ieee80211_free_node(ni); 2047 goto restart; 2048 } 2049 } 2050 IEEE80211_NODE_UNLOCK(nt); 2051 2052 IEEE80211_NODE_ITERATE_UNLOCK(nt); 2053} 2054 2055void 2056ieee80211_dump_node(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 2057{ 2058 printf("0x%p: mac %s refcnt %d\n", ni, 2059 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)); 2060 printf("\tscangen %u authmode %u flags 0x%x\n", 2061 ni->ni_scangen, ni->ni_authmode, ni->ni_flags); 2062 printf("\tassocid 0x%x txpower %u vlan %u\n", 2063 ni->ni_associd, ni->ni_txpower, ni->ni_vlan); 2064 printf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n", 2065 ni->ni_txseqs[IEEE80211_NONQOS_TID], 2066 ni->ni_rxseqs[IEEE80211_NONQOS_TID] >> IEEE80211_SEQ_SEQ_SHIFT, 2067 ni->ni_rxseqs[IEEE80211_NONQOS_TID] & IEEE80211_SEQ_FRAG_MASK, 2068 ni->ni_rxfragstamp); 2069 printf("\trstamp %u rssi %d noise %d intval %u capinfo 0x%x\n", 2070 ni->ni_rstamp, node_getrssi(ni), ni->ni_noise, 2071 ni->ni_intval, ni->ni_capinfo); 2072 printf("\tbssid %s essid \"%.*s\" channel %u:0x%x\n", 2073 ether_sprintf(ni->ni_bssid), 2074 ni->ni_esslen, ni->ni_essid, 2075 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags); 2076 printf("\tinact %u txrate %u\n", 2077 ni->ni_inact, ni->ni_txrate); 2078 printf("\thtcap %x htparam %x htctlchan %u ht2ndchan %u\n", 2079 ni->ni_htcap, ni->ni_htparam, 2080 ni->ni_htctlchan, ni->ni_ht2ndchan); 2081 printf("\thtopmode %x htstbc %x chw %u\n", 2082 ni->ni_htopmode, ni->ni_htstbc, ni->ni_chw); 2083} 2084 2085void 2086ieee80211_dump_nodes(struct ieee80211_node_table *nt) 2087{ 2088 ieee80211_iterate_nodes(nt, 2089 (ieee80211_iter_func *) ieee80211_dump_node, nt); 2090} 2091 2092static void 2093ieee80211_notify_erp_locked(struct ieee80211com *ic) 2094{ 2095 struct ieee80211vap *vap; 2096 2097 IEEE80211_LOCK_ASSERT(ic); 2098 2099 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 2100 if (vap->iv_opmode == IEEE80211_M_HOSTAP) 2101 ieee80211_beacon_notify(vap, IEEE80211_BEACON_ERP); 2102} 2103 2104void 2105ieee80211_notify_erp(struct ieee80211com *ic) 2106{ 2107 IEEE80211_LOCK(ic); 2108 ieee80211_notify_erp_locked(ic); 2109 IEEE80211_UNLOCK(ic); 2110} 2111 2112/* 2113 * Handle a station joining an 11g network. 2114 */ 2115static void 2116ieee80211_node_join_11g(struct ieee80211_node *ni) 2117{ 2118 struct ieee80211com *ic = ni->ni_ic; 2119 2120 IEEE80211_LOCK_ASSERT(ic); 2121 2122 /* 2123 * Station isn't capable of short slot time. Bump 2124 * the count of long slot time stations and disable 2125 * use of short slot time. Note that the actual switch 2126 * over to long slot time use may not occur until the 2127 * next beacon transmission (per sec. 7.3.1.4 of 11g). 2128 */ 2129 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2130 ic->ic_longslotsta++; 2131 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2132 "station needs long slot time, count %d", 2133 ic->ic_longslotsta); 2134 /* XXX vap's w/ conflicting needs won't work */ 2135 if (!IEEE80211_IS_CHAN_108G(ic->ic_bsschan)) { 2136 /* 2137 * Don't force slot time when switched to turbo 2138 * mode as non-ERP stations won't be present; this 2139 * need only be done when on the normal G channel. 2140 */ 2141 ieee80211_set_shortslottime(ic, 0); 2142 } 2143 } 2144 /* 2145 * If the new station is not an ERP station 2146 * then bump the counter and enable protection 2147 * if configured. 2148 */ 2149 if (!ieee80211_iserp_rateset(&ni->ni_rates)) { 2150 ic->ic_nonerpsta++; 2151 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2152 "station is !ERP, %d non-ERP stations associated", 2153 ic->ic_nonerpsta); 2154 /* 2155 * If station does not support short preamble 2156 * then we must enable use of Barker preamble. 2157 */ 2158 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) { 2159 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2160 "%s", "station needs long preamble"); 2161 ic->ic_flags |= IEEE80211_F_USEBARKER; 2162 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; 2163 } 2164 /* 2165 * If protection is configured and this is the first 2166 * indication we should use protection, enable it. 2167 */ 2168 if (ic->ic_protmode != IEEE80211_PROT_NONE && 2169 ic->ic_nonerpsta == 1 && 2170 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2171 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2172 "%s: enable use of protection\n", __func__); 2173 ic->ic_flags |= IEEE80211_F_USEPROT; 2174 ieee80211_notify_erp_locked(ic); 2175 } 2176 } else 2177 ni->ni_flags |= IEEE80211_NODE_ERP; 2178} 2179 2180void 2181ieee80211_node_join(struct ieee80211_node *ni, int resp) 2182{ 2183 struct ieee80211com *ic = ni->ni_ic; 2184 struct ieee80211vap *vap = ni->ni_vap; 2185 int newassoc; 2186 2187 if (ni->ni_associd == 0) { 2188 uint16_t aid; 2189 2190 KASSERT(vap->iv_aid_bitmap != NULL, ("no aid bitmap")); 2191 /* 2192 * It would be good to search the bitmap 2193 * more efficiently, but this will do for now. 2194 */ 2195 for (aid = 1; aid < vap->iv_max_aid; aid++) { 2196 if (!IEEE80211_AID_ISSET(vap, aid)) 2197 break; 2198 } 2199 if (aid >= vap->iv_max_aid) { 2200 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_TOOMANY); 2201 ieee80211_node_leave(ni); 2202 return; 2203 } 2204 ni->ni_associd = aid | 0xc000; 2205 ni->ni_jointime = time_uptime; 2206 IEEE80211_LOCK(ic); 2207 IEEE80211_AID_SET(vap, ni->ni_associd); 2208 vap->iv_sta_assoc++; 2209 ic->ic_sta_assoc++; 2210 2211 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2212 ieee80211_ht_node_join(ni); 2213 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2214 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2215 ieee80211_node_join_11g(ni); 2216 IEEE80211_UNLOCK(ic); 2217 2218 newassoc = 1; 2219 } else 2220 newassoc = 0; 2221 2222 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2223 "station associated at aid %d: %s preamble, %s slot time%s%s%s%s%s%s", 2224 IEEE80211_NODE_AID(ni), 2225 ic->ic_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long", 2226 ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long", 2227 ic->ic_flags & IEEE80211_F_USEPROT ? ", protection" : "", 2228 ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "", 2229 ni->ni_flags & IEEE80211_NODE_HT ? 2230 (ni->ni_chw == 20 ? ", HT20" : ", HT40") : "", 2231 ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "", 2232 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ? 2233 ", fast-frames" : "", 2234 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ? 2235 ", turbo" : "" 2236 ); 2237 2238 /* give driver a chance to setup state like ni_txrate */ 2239 if (ic->ic_newassoc != NULL) 2240 ic->ic_newassoc(ni, newassoc); 2241 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_SUCCESS); 2242 /* tell the authenticator about new station */ 2243 if (vap->iv_auth->ia_node_join != NULL) 2244 vap->iv_auth->ia_node_join(ni); 2245 ieee80211_notify_node_join(ni, 2246 resp == IEEE80211_FC0_SUBTYPE_ASSOC_RESP); 2247} 2248 2249static void 2250disable_protection(struct ieee80211com *ic) 2251{ 2252 KASSERT(ic->ic_nonerpsta == 0 && 2253 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0, 2254 ("%d non ERP stations, flags 0x%x", ic->ic_nonerpsta, 2255 ic->ic_flags_ext)); 2256 2257 ic->ic_flags &= ~IEEE80211_F_USEPROT; 2258 /* XXX verify mode? */ 2259 if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) { 2260 ic->ic_flags |= IEEE80211_F_SHPREAMBLE; 2261 ic->ic_flags &= ~IEEE80211_F_USEBARKER; 2262 } 2263 ieee80211_notify_erp_locked(ic); 2264} 2265 2266/* 2267 * Handle a station leaving an 11g network. 2268 */ 2269static void 2270ieee80211_node_leave_11g(struct ieee80211_node *ni) 2271{ 2272 struct ieee80211com *ic = ni->ni_ic; 2273 2274 IEEE80211_LOCK_ASSERT(ic); 2275 2276 KASSERT(IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan), 2277 ("not in 11g, bss %u:0x%x", ic->ic_bsschan->ic_freq, 2278 ic->ic_bsschan->ic_flags)); 2279 2280 /* 2281 * If a long slot station do the slot time bookkeeping. 2282 */ 2283 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2284 KASSERT(ic->ic_longslotsta > 0, 2285 ("bogus long slot station count %d", ic->ic_longslotsta)); 2286 ic->ic_longslotsta--; 2287 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2288 "long slot time station leaves, count now %d", 2289 ic->ic_longslotsta); 2290 if (ic->ic_longslotsta == 0) { 2291 /* 2292 * Re-enable use of short slot time if supported 2293 * and not operating in IBSS mode (per spec). 2294 */ 2295 if ((ic->ic_caps & IEEE80211_C_SHSLOT) && 2296 ic->ic_opmode != IEEE80211_M_IBSS) { 2297 IEEE80211_DPRINTF(ni->ni_vap, 2298 IEEE80211_MSG_ASSOC, 2299 "%s: re-enable use of short slot time\n", 2300 __func__); 2301 ieee80211_set_shortslottime(ic, 1); 2302 } 2303 } 2304 } 2305 /* 2306 * If a non-ERP station do the protection-related bookkeeping. 2307 */ 2308 if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) { 2309 KASSERT(ic->ic_nonerpsta > 0, 2310 ("bogus non-ERP station count %d", ic->ic_nonerpsta)); 2311 ic->ic_nonerpsta--; 2312 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2313 "non-ERP station leaves, count now %d%s", ic->ic_nonerpsta, 2314 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) ? 2315 " (non-ERP sta present)" : ""); 2316 if (ic->ic_nonerpsta == 0 && 2317 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2318 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2319 "%s: disable use of protection\n", __func__); 2320 disable_protection(ic); 2321 } 2322 } 2323} 2324 2325/* 2326 * Time out presence of an overlapping bss with non-ERP 2327 * stations. When operating in hostap mode we listen for 2328 * beacons from other stations and if we identify a non-ERP 2329 * station is present we enable protection. To identify 2330 * when all non-ERP stations are gone we time out this 2331 * condition. 2332 */ 2333static void 2334ieee80211_erp_timeout(struct ieee80211com *ic) 2335{ 2336 2337 IEEE80211_LOCK_ASSERT(ic); 2338 2339 if ((ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) && 2340 time_after(ticks, ic->ic_lastnonerp + IEEE80211_NONERP_PRESENT_AGE)) { 2341#if 0 2342 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni, 2343 "%s", "age out non-ERP sta present on channel"); 2344#endif 2345 ic->ic_flags_ext &= ~IEEE80211_FEXT_NONERP_PR; 2346 if (ic->ic_nonerpsta == 0) 2347 disable_protection(ic); 2348 } 2349} 2350 2351/* 2352 * Handle bookkeeping for station deauthentication/disassociation 2353 * when operating as an ap. 2354 */ 2355void 2356ieee80211_node_leave(struct ieee80211_node *ni) 2357{ 2358 struct ieee80211com *ic = ni->ni_ic; 2359 struct ieee80211vap *vap = ni->ni_vap; 2360 struct ieee80211_node_table *nt = ni->ni_table; 2361 2362 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2363 "station with aid %d leaves", IEEE80211_NODE_AID(ni)); 2364 2365 KASSERT(vap->iv_opmode != IEEE80211_M_STA, 2366 ("unexpected operating mode %u", vap->iv_opmode)); 2367 /* 2368 * If node wasn't previously associated all 2369 * we need to do is reclaim the reference. 2370 */ 2371 /* XXX ibss mode bypasses 11g and notification */ 2372 if (ni->ni_associd == 0) 2373 goto done; 2374 /* 2375 * Tell the authenticator the station is leaving. 2376 * Note that we must do this before yanking the 2377 * association id as the authenticator uses the 2378 * associd to locate it's state block. 2379 */ 2380 if (vap->iv_auth->ia_node_leave != NULL) 2381 vap->iv_auth->ia_node_leave(ni); 2382 2383 IEEE80211_LOCK(ic); 2384 IEEE80211_AID_CLR(vap, ni->ni_associd); 2385 ni->ni_associd = 0; 2386 vap->iv_sta_assoc--; 2387 ic->ic_sta_assoc--; 2388 2389 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2390 ieee80211_ht_node_leave(ni); 2391 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2392 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2393 ieee80211_node_leave_11g(ni); 2394 IEEE80211_UNLOCK(ic); 2395 /* 2396 * Cleanup station state. In particular clear various 2397 * state that might otherwise be reused if the node 2398 * is reused before the reference count goes to zero 2399 * (and memory is reclaimed). 2400 */ 2401 ieee80211_sta_leave(ni); 2402done: 2403 /* 2404 * Remove the node from any table it's recorded in and 2405 * drop the caller's reference. Removal from the table 2406 * is important to insure the node is not reprocessed 2407 * for inactivity. 2408 */ 2409 if (nt != NULL) { 2410 IEEE80211_NODE_LOCK(nt); 2411 node_reclaim(nt, ni); 2412 IEEE80211_NODE_UNLOCK(nt); 2413 } else 2414 ieee80211_free_node(ni); 2415} 2416 2417struct rssiinfo { 2418 struct ieee80211vap *vap; 2419 int rssi_samples; 2420 uint32_t rssi_total; 2421}; 2422 2423static void 2424get_hostap_rssi(void *arg, struct ieee80211_node *ni) 2425{ 2426 struct rssiinfo *info = arg; 2427 struct ieee80211vap *vap = ni->ni_vap; 2428 int8_t rssi; 2429 2430 if (info->vap != vap) 2431 return; 2432 /* only associated stations */ 2433 if (ni->ni_associd == 0) 2434 return; 2435 rssi = vap->iv_ic->ic_node_getrssi(ni); 2436 if (rssi != 0) { 2437 info->rssi_samples++; 2438 info->rssi_total += rssi; 2439 } 2440} 2441 2442static void 2443get_adhoc_rssi(void *arg, struct ieee80211_node *ni) 2444{ 2445 struct rssiinfo *info = arg; 2446 struct ieee80211vap *vap = ni->ni_vap; 2447 int8_t rssi; 2448 2449 if (info->vap != vap) 2450 return; 2451 /* only neighbors */ 2452 /* XXX check bssid */ 2453 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 2454 return; 2455 rssi = vap->iv_ic->ic_node_getrssi(ni); 2456 if (rssi != 0) { 2457 info->rssi_samples++; 2458 info->rssi_total += rssi; 2459 } 2460} 2461 2462int8_t 2463ieee80211_getrssi(struct ieee80211vap *vap) 2464{ 2465#define NZ(x) ((x) == 0 ? 1 : (x)) 2466 struct ieee80211com *ic = vap->iv_ic; 2467 struct rssiinfo info; 2468 2469 info.rssi_total = 0; 2470 info.rssi_samples = 0; 2471 info.vap = vap; 2472 switch (vap->iv_opmode) { 2473 case IEEE80211_M_IBSS: /* average of all ibss neighbors */ 2474 case IEEE80211_M_AHDEMO: /* average of all neighbors */ 2475 ieee80211_iterate_nodes(&ic->ic_sta, get_adhoc_rssi, &info); 2476 break; 2477 case IEEE80211_M_HOSTAP: /* average of all associated stations */ 2478 ieee80211_iterate_nodes(&ic->ic_sta, get_hostap_rssi, &info); 2479 break; 2480 case IEEE80211_M_MONITOR: /* XXX */ 2481 case IEEE80211_M_STA: /* use stats from associated ap */ 2482 default: 2483 if (vap->iv_bss != NULL) 2484 info.rssi_total = ic->ic_node_getrssi(vap->iv_bss); 2485 info.rssi_samples = 1; 2486 break; 2487 } 2488 return info.rssi_total / NZ(info.rssi_samples); 2489#undef NZ 2490} 2491 2492void 2493ieee80211_getsignal(struct ieee80211vap *vap, int8_t *rssi, int8_t *noise) 2494{ 2495 2496 if (vap->iv_bss == NULL) /* NB: shouldn't happen */ 2497 return; 2498 vap->iv_ic->ic_node_getsignal(vap->iv_bss, rssi, noise); 2499 /* for non-station mode return avg'd rssi accounting */ 2500 if (vap->iv_opmode != IEEE80211_M_STA) 2501 *rssi = ieee80211_getrssi(vap); 2502} 2503