ieee80211_node.c revision 183255
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 183255 2008-09-21 23:59:14Z 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 * Fix tx parameters for a node according to ``association state''. 206 */ 207static void 208node_setuptxparms(struct ieee80211_node *ni) 209{ 210 struct ieee80211vap *vap = ni->ni_vap; 211 212 if (ni->ni_flags & IEEE80211_NODE_HT) { 213 if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan)) 214 ni->ni_txparms = &vap->iv_txparms[IEEE80211_MODE_11NA]; 215 else 216 ni->ni_txparms = &vap->iv_txparms[IEEE80211_MODE_11NG]; 217 } else { /* legacy rate handling */ 218 if (IEEE80211_IS_CHAN_A(ni->ni_chan)) 219 ni->ni_txparms = &vap->iv_txparms[IEEE80211_MODE_11A]; 220 else if (ni->ni_flags & IEEE80211_NODE_ERP) 221 ni->ni_txparms = &vap->iv_txparms[IEEE80211_MODE_11G]; 222 else 223 ni->ni_txparms = &vap->iv_txparms[IEEE80211_MODE_11B]; 224 } 225} 226 227/* 228 * Set/change the channel. The rate set is also updated as 229 * to insure a consistent view by drivers. 230 * XXX should be private but hostap needs it to deal with CSA 231 */ 232void 233ieee80211_node_set_chan(struct ieee80211_node *ni, 234 struct ieee80211_channel *chan) 235{ 236 struct ieee80211com *ic = ni->ni_ic; 237 struct ieee80211vap *vap = ni->ni_vap; 238 enum ieee80211_phymode mode; 239 240 KASSERT(chan != IEEE80211_CHAN_ANYC, ("no channel")); 241 242 ni->ni_chan = chan; 243 mode = ieee80211_chan2mode(chan); 244 if (IEEE80211_IS_CHAN_HT(chan)) { 245 /* 246 * XXX Gotta be careful here; the rate set returned by 247 * ieee80211_get_suprates is actually any HT rate 248 * set so blindly copying it will be bad. We must 249 * install the legacy rate est in ni_rates and the 250 * HT rate set in ni_htrates. 251 */ 252 ni->ni_htrates = *ieee80211_get_suphtrates(ic, chan); 253 /* 254 * Setup bss tx parameters based on operating mode. We 255 * use legacy rates when operating in a mixed HT+non-HT bss 256 * and non-ERP rates in 11g for mixed ERP+non-ERP bss. 257 */ 258 if (mode == IEEE80211_MODE_11NA && 259 (vap->iv_flags_ext & IEEE80211_FEXT_PUREN) == 0) 260 mode = IEEE80211_MODE_11A; 261 else if (mode == IEEE80211_MODE_11NG && 262 (vap->iv_flags_ext & IEEE80211_FEXT_PUREN) == 0) 263 mode = IEEE80211_MODE_11G; 264 if (mode == IEEE80211_MODE_11G && 265 (vap->iv_flags & IEEE80211_F_PUREG) == 0) 266 mode = IEEE80211_MODE_11B; 267 } 268 ni->ni_txparms = &vap->iv_txparms[mode]; 269 ni->ni_rates = *ieee80211_get_suprates(ic, chan); 270} 271 272static __inline void 273copy_bss(struct ieee80211_node *nbss, const struct ieee80211_node *obss) 274{ 275 /* propagate useful state */ 276 nbss->ni_authmode = obss->ni_authmode; 277 nbss->ni_txpower = obss->ni_txpower; 278 nbss->ni_vlan = obss->ni_vlan; 279 /* XXX statistics? */ 280 /* XXX legacy WDS bssid? */ 281} 282 283void 284ieee80211_create_ibss(struct ieee80211vap* vap, struct ieee80211_channel *chan) 285{ 286 struct ieee80211com *ic = vap->iv_ic; 287 struct ieee80211_node *ni; 288 289 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, 290 "%s: creating ibss on channel %u\n", __func__, 291 ieee80211_chan2ieee(ic, chan)); 292 293 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr); 294 if (ni == NULL) { 295 /* XXX recovery? */ 296 return; 297 } 298 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr); 299 ni->ni_esslen = vap->iv_des_ssid[0].len; 300 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen); 301 if (vap->iv_bss != NULL) 302 copy_bss(ni, vap->iv_bss); 303 ni->ni_intval = ic->ic_bintval; 304 if (vap->iv_flags & IEEE80211_F_PRIVACY) 305 ni->ni_capinfo |= IEEE80211_CAPINFO_PRIVACY; 306 if (ic->ic_phytype == IEEE80211_T_FH) { 307 ni->ni_fhdwell = 200; /* XXX */ 308 ni->ni_fhindex = 1; 309 } 310 if (vap->iv_opmode == IEEE80211_M_IBSS) { 311 vap->iv_flags |= IEEE80211_F_SIBSS; 312 ni->ni_capinfo |= IEEE80211_CAPINFO_IBSS; /* XXX */ 313 if (vap->iv_flags & IEEE80211_F_DESBSSID) 314 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid); 315 else { 316 get_random_bytes(ni->ni_bssid, IEEE80211_ADDR_LEN); 317 /* clear group bit, add local bit */ 318 ni->ni_bssid[0] = (ni->ni_bssid[0] &~ 0x01) | 0x02; 319 } 320 } else if (vap->iv_opmode == IEEE80211_M_AHDEMO) { 321 if (vap->iv_flags & IEEE80211_F_DESBSSID) 322 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid); 323 else 324 memset(ni->ni_bssid, 0, IEEE80211_ADDR_LEN); 325 } 326 /* 327 * Fix the channel and related attributes. 328 */ 329 /* clear DFS CAC state on previous channel */ 330 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC && 331 ic->ic_bsschan->ic_freq != chan->ic_freq && 332 IEEE80211_IS_CHAN_CACDONE(ic->ic_bsschan)) 333 ieee80211_dfs_cac_clear(ic, ic->ic_bsschan); 334 ic->ic_bsschan = chan; 335 ieee80211_node_set_chan(ni, chan); 336 ic->ic_curmode = ieee80211_chan2mode(chan); 337 /* 338 * Do mode-specific setup. 339 */ 340 if (IEEE80211_IS_CHAN_FULL(chan)) { 341 if (IEEE80211_IS_CHAN_ANYG(chan)) { 342 /* 343 * Use a mixed 11b/11g basic rate set. 344 */ 345 ieee80211_setbasicrates(&ni->ni_rates, 346 IEEE80211_MODE_11G); 347 if (vap->iv_flags & IEEE80211_F_PUREG) { 348 /* 349 * Also mark OFDM rates basic so 11b 350 * stations do not join (WiFi compliance). 351 */ 352 ieee80211_addbasicrates(&ni->ni_rates, 353 IEEE80211_MODE_11A); 354 } 355 } else if (IEEE80211_IS_CHAN_B(chan)) { 356 /* 357 * Force pure 11b rate set. 358 */ 359 ieee80211_setbasicrates(&ni->ni_rates, 360 IEEE80211_MODE_11B); 361 } 362 } 363 364 (void) ieee80211_sta_join1(ieee80211_ref_node(ni)); 365} 366 367/* 368 * Reset bss state on transition to the INIT state. 369 * Clear any stations from the table (they have been 370 * deauth'd) and reset the bss node (clears key, rate 371 * etc. state). 372 */ 373void 374ieee80211_reset_bss(struct ieee80211vap *vap) 375{ 376 struct ieee80211com *ic = vap->iv_ic; 377 struct ieee80211_node *ni, *obss; 378 379 ieee80211_node_table_reset(&ic->ic_sta, vap); 380 /* XXX multi-bss: wrong */ 381 ieee80211_reset_erp(ic); 382 383 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr); 384 KASSERT(ni != NULL, ("unable to setup inital BSS node")); 385 obss = vap->iv_bss; 386 vap->iv_bss = ieee80211_ref_node(ni); 387 if (obss != NULL) { 388 copy_bss(ni, obss); 389 ni->ni_intval = ic->ic_bintval; 390 ieee80211_free_node(obss); 391 } else 392 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr); 393} 394 395static int 396match_ssid(const struct ieee80211_node *ni, 397 int nssid, const struct ieee80211_scan_ssid ssids[]) 398{ 399 int i; 400 401 for (i = 0; i < nssid; i++) { 402 if (ni->ni_esslen == ssids[i].len && 403 memcmp(ni->ni_essid, ssids[i].ssid, ni->ni_esslen) == 0) 404 return 1; 405 } 406 return 0; 407} 408 409/* 410 * Test a node for suitability/compatibility. 411 */ 412static int 413check_bss(struct ieee80211vap *vap, struct ieee80211_node *ni) 414{ 415 struct ieee80211com *ic = ni->ni_ic; 416 uint8_t rate; 417 418 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 419 return 0; 420 if (vap->iv_opmode == IEEE80211_M_IBSS) { 421 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 422 return 0; 423 } else { 424 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 425 return 0; 426 } 427 if (vap->iv_flags & IEEE80211_F_PRIVACY) { 428 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 429 return 0; 430 } else { 431 /* XXX does this mean privacy is supported or required? */ 432 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 433 return 0; 434 } 435 rate = ieee80211_fix_rate(ni, &ni->ni_rates, 436 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 437 if (rate & IEEE80211_RATE_BASIC) 438 return 0; 439 if (vap->iv_des_nssid != 0 && 440 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid)) 441 return 0; 442 if ((vap->iv_flags & IEEE80211_F_DESBSSID) && 443 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid)) 444 return 0; 445 return 1; 446} 447 448#ifdef IEEE80211_DEBUG 449/* 450 * Display node suitability/compatibility. 451 */ 452static void 453check_bss_debug(struct ieee80211vap *vap, struct ieee80211_node *ni) 454{ 455 struct ieee80211com *ic = ni->ni_ic; 456 uint8_t rate; 457 int fail; 458 459 fail = 0; 460 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 461 fail |= 0x01; 462 if (vap->iv_opmode == IEEE80211_M_IBSS) { 463 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 464 fail |= 0x02; 465 } else { 466 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 467 fail |= 0x02; 468 } 469 if (vap->iv_flags & IEEE80211_F_PRIVACY) { 470 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 471 fail |= 0x04; 472 } else { 473 /* XXX does this mean privacy is supported or required? */ 474 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 475 fail |= 0x04; 476 } 477 rate = ieee80211_fix_rate(ni, &ni->ni_rates, 478 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 479 if (rate & IEEE80211_RATE_BASIC) 480 fail |= 0x08; 481 if (vap->iv_des_nssid != 0 && 482 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid)) 483 fail |= 0x10; 484 if ((vap->iv_flags & IEEE80211_F_DESBSSID) && 485 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid)) 486 fail |= 0x20; 487 488 printf(" %c %s", fail ? '-' : '+', ether_sprintf(ni->ni_macaddr)); 489 printf(" %s%c", ether_sprintf(ni->ni_bssid), fail & 0x20 ? '!' : ' '); 490 printf(" %3d%c", 491 ieee80211_chan2ieee(ic, ni->ni_chan), fail & 0x01 ? '!' : ' '); 492 printf(" %2dM%c", (rate & IEEE80211_RATE_VAL) / 2, 493 fail & 0x08 ? '!' : ' '); 494 printf(" %4s%c", 495 (ni->ni_capinfo & IEEE80211_CAPINFO_ESS) ? "ess" : 496 (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) ? "ibss" : 497 "????", 498 fail & 0x02 ? '!' : ' '); 499 printf(" %3s%c ", 500 (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) ? "wep" : "no", 501 fail & 0x04 ? '!' : ' '); 502 ieee80211_print_essid(ni->ni_essid, ni->ni_esslen); 503 printf("%s\n", fail & 0x10 ? "!" : ""); 504} 505#endif /* IEEE80211_DEBUG */ 506 507/* 508 * Handle 802.11 ad hoc network merge. The 509 * convention, set by the Wireless Ethernet Compatibility Alliance 510 * (WECA), is that an 802.11 station will change its BSSID to match 511 * the "oldest" 802.11 ad hoc network, on the same channel, that 512 * has the station's desired SSID. The "oldest" 802.11 network 513 * sends beacons with the greatest TSF timestamp. 514 * 515 * The caller is assumed to validate TSF's before attempting a merge. 516 * 517 * Return !0 if the BSSID changed, 0 otherwise. 518 */ 519int 520ieee80211_ibss_merge(struct ieee80211_node *ni) 521{ 522 struct ieee80211vap *vap = ni->ni_vap; 523#ifdef IEEE80211_DEBUG 524 struct ieee80211com *ic = ni->ni_ic; 525#endif 526 527 if (ni == vap->iv_bss || 528 IEEE80211_ADDR_EQ(ni->ni_bssid, vap->iv_bss->ni_bssid)) { 529 /* unchanged, nothing to do */ 530 return 0; 531 } 532 if (!check_bss(vap, ni)) { 533 /* capabilities mismatch */ 534 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 535 "%s: merge failed, capabilities mismatch\n", __func__); 536#ifdef IEEE80211_DEBUG 537 if (ieee80211_msg_assoc(vap)) 538 check_bss_debug(vap, ni); 539#endif 540 vap->iv_stats.is_ibss_capmismatch++; 541 return 0; 542 } 543 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 544 "%s: new bssid %s: %s preamble, %s slot time%s\n", __func__, 545 ether_sprintf(ni->ni_bssid), 546 ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long", 547 ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long", 548 ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : "" 549 ); 550 return ieee80211_sta_join1(ieee80211_ref_node(ni)); 551} 552 553/* 554 * Calculate HT channel promotion flags for all vaps. 555 * This assumes ni_chan have been setup for each vap. 556 */ 557static int 558gethtadjustflags(struct ieee80211com *ic) 559{ 560 struct ieee80211vap *vap; 561 int flags; 562 563 flags = 0; 564 /* XXX locking */ 565 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 566 if (vap->iv_state < IEEE80211_S_RUN) 567 continue; 568 switch (vap->iv_opmode) { 569 case IEEE80211_M_WDS: 570 case IEEE80211_M_STA: 571 case IEEE80211_M_AHDEMO: 572 case IEEE80211_M_HOSTAP: 573 case IEEE80211_M_IBSS: 574 flags |= ieee80211_htchanflags(vap->iv_bss->ni_chan); 575 break; 576 default: 577 break; 578 } 579 } 580 return flags; 581} 582 583/* 584 * Check if the current channel needs to change based on whether 585 * any vap's are using HT20/HT40. This is used sync the state of 586 * ic_curchan after a channel width change on a running vap. 587 */ 588void 589ieee80211_sync_curchan(struct ieee80211com *ic) 590{ 591 struct ieee80211_channel *c; 592 593 c = ieee80211_ht_adjust_channel(ic, ic->ic_curchan, gethtadjustflags(ic)); 594 if (c != ic->ic_curchan) { 595 ic->ic_curchan = c; 596 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan); 597 ic->ic_set_channel(ic); 598 } 599} 600 601/* 602 * Change the current channel. The request channel may be 603 * promoted if other vap's are operating with HT20/HT40. 604 */ 605void 606ieee80211_setcurchan(struct ieee80211com *ic, struct ieee80211_channel *c) 607{ 608 if (ic->ic_htcaps & IEEE80211_HTC_HT) { 609 int flags = gethtadjustflags(ic); 610 /* 611 * Check for channel promotion required to support the 612 * set of running vap's. This assumes we are called 613 * after ni_chan is setup for each vap. 614 */ 615 /* NB: this assumes IEEE80211_FEXT_USEHT40 > IEEE80211_FEXT_HT */ 616 if (flags > ieee80211_htchanflags(c)) 617 c = ieee80211_ht_adjust_channel(ic, c, flags); 618 } 619 ic->ic_bsschan = ic->ic_curchan = c; 620 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan); 621 ic->ic_set_channel(ic); 622} 623 624/* 625 * Join the specified IBSS/BSS network. The node is assumed to 626 * be passed in with a held reference. 627 */ 628static int 629ieee80211_sta_join1(struct ieee80211_node *selbs) 630{ 631 struct ieee80211vap *vap = selbs->ni_vap; 632 struct ieee80211com *ic = selbs->ni_ic; 633 struct ieee80211_node *obss; 634 int canreassoc; 635 636 /* 637 * Committed to selbs, setup state. 638 */ 639 obss = vap->iv_bss; 640 /* 641 * Check if old+new node have the same address in which 642 * case we can reassociate when operating in sta mode. 643 */ 644 canreassoc = (obss != NULL && 645 vap->iv_state == IEEE80211_S_RUN && 646 IEEE80211_ADDR_EQ(obss->ni_macaddr, selbs->ni_macaddr)); 647 vap->iv_bss = selbs; /* NB: caller assumed to bump refcnt */ 648 if (obss != NULL) { 649 copy_bss(selbs, obss); 650 ieee80211_node_reclaim(obss); 651 obss = NULL; /* NB: guard against later use */ 652 } 653 654 /* 655 * Delete unusable rates; we've already checked 656 * that the negotiated rate set is acceptable. 657 */ 658 ieee80211_fix_rate(vap->iv_bss, &vap->iv_bss->ni_rates, 659 IEEE80211_F_DODEL | IEEE80211_F_JOIN); 660 661 ieee80211_setcurchan(ic, selbs->ni_chan); 662 /* 663 * Set the erp state (mostly the slot time) to deal with 664 * the auto-select case; this should be redundant if the 665 * mode is locked. 666 */ 667 ieee80211_reset_erp(ic); 668 ieee80211_wme_initparams(vap); 669 670 if (vap->iv_opmode == IEEE80211_M_STA) { 671 if (canreassoc) { 672 /* Reassociate */ 673 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 1); 674 } else { 675 /* 676 * Act as if we received a DEAUTH frame in case we 677 * are invoked from the RUN state. This will cause 678 * us to try to re-authenticate if we are operating 679 * as a station. 680 */ 681 ieee80211_new_state(vap, IEEE80211_S_AUTH, 682 IEEE80211_FC0_SUBTYPE_DEAUTH); 683 } 684 } else 685 ieee80211_new_state(vap, IEEE80211_S_RUN, -1); 686 return 1; 687} 688 689int 690ieee80211_sta_join(struct ieee80211vap *vap, 691 const struct ieee80211_scan_entry *se) 692{ 693 struct ieee80211com *ic = vap->iv_ic; 694 struct ieee80211_node *ni; 695 696 ni = ieee80211_alloc_node(&ic->ic_sta, vap, se->se_macaddr); 697 if (ni == NULL) { 698 /* XXX msg */ 699 return 0; 700 } 701 /* 702 * Expand scan state into node's format. 703 * XXX may not need all this stuff 704 */ 705 IEEE80211_ADDR_COPY(ni->ni_bssid, se->se_bssid); 706 ni->ni_esslen = se->se_ssid[1]; 707 memcpy(ni->ni_essid, se->se_ssid+2, ni->ni_esslen); 708 ni->ni_rstamp = se->se_rstamp; 709 ni->ni_tstamp.tsf = se->se_tstamp.tsf; 710 ni->ni_intval = se->se_intval; 711 ni->ni_capinfo = se->se_capinfo; 712 ni->ni_chan = se->se_chan; 713 ni->ni_timoff = se->se_timoff; 714 ni->ni_fhdwell = se->se_fhdwell; 715 ni->ni_fhindex = se->se_fhindex; 716 ni->ni_erp = se->se_erp; 717 IEEE80211_RSSI_LPF(ni->ni_avgrssi, se->se_rssi); 718 ni->ni_noise = se->se_noise; 719 720 if (ieee80211_ies_init(&ni->ni_ies, se->se_ies.data, se->se_ies.len)) { 721 ieee80211_ies_expand(&ni->ni_ies); 722 if (ni->ni_ies.ath_ie != NULL) 723 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 724 if (ni->ni_ies.htcap_ie != NULL) 725 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie); 726 if (ni->ni_ies.htinfo_ie != NULL) 727 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie); 728 } 729 730 vap->iv_dtim_period = se->se_dtimperiod; 731 vap->iv_dtim_count = 0; 732 733 /* NB: must be after ni_chan is setup */ 734 ieee80211_setup_rates(ni, se->se_rates, se->se_xrates, 735 IEEE80211_F_DOSORT); 736 737 return ieee80211_sta_join1(ieee80211_ref_node(ni)); 738} 739 740/* 741 * Leave the specified IBSS/BSS network. The node is assumed to 742 * be passed in with a held reference. 743 */ 744void 745ieee80211_sta_leave(struct ieee80211_node *ni) 746{ 747 struct ieee80211com *ic = ni->ni_ic; 748 749 ic->ic_node_cleanup(ni); 750 ieee80211_notify_node_leave(ni); 751} 752 753/* 754 * Send a deauthenticate frame and drop the station. 755 */ 756void 757ieee80211_node_deauth(struct ieee80211_node *ni, int reason) 758{ 759 /* NB: bump the refcnt to be sure temporay nodes are not reclaimed */ 760 ieee80211_ref_node(ni); 761 if (ni->ni_associd != 0) 762 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH, reason); 763 ieee80211_node_leave(ni); 764 ieee80211_free_node(ni); 765} 766 767static struct ieee80211_node * 768node_alloc(struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 769{ 770 struct ieee80211_node *ni; 771 772 MALLOC(ni, struct ieee80211_node *, sizeof(struct ieee80211_node), 773 M_80211_NODE, M_NOWAIT | M_ZERO); 774 return ni; 775} 776 777/* 778 * Initialize an ie blob with the specified data. If previous 779 * data exists re-use the data block. As a side effect we clear 780 * all references to specific ie's; the caller is required to 781 * recalculate them. 782 */ 783int 784ieee80211_ies_init(struct ieee80211_ies *ies, const uint8_t *data, int len) 785{ 786 /* NB: assumes data+len are the last fields */ 787 memset(ies, 0, offsetof(struct ieee80211_ies, data)); 788 if (ies->data != NULL && ies->len != len) { 789 /* data size changed */ 790 FREE(ies->data, M_80211_NODE_IE); 791 ies->data = NULL; 792 } 793 if (ies->data == NULL) { 794 MALLOC(ies->data, uint8_t *, len, M_80211_NODE_IE, M_NOWAIT); 795 if (ies->data == NULL) { 796 ies->len = 0; 797 /* NB: pointers have already been zero'd above */ 798 return 0; 799 } 800 } 801 memcpy(ies->data, data, len); 802 ies->len = len; 803 return 1; 804} 805 806/* 807 * Reclaim storage for an ie blob. 808 */ 809void 810ieee80211_ies_cleanup(struct ieee80211_ies *ies) 811{ 812 if (ies->data != NULL) 813 FREE(ies->data, M_80211_NODE_IE); 814} 815 816/* 817 * Expand an ie blob data contents and to fillin individual 818 * ie pointers. The data blob is assumed to be well-formed; 819 * we don't do any validity checking of ie lengths. 820 */ 821void 822ieee80211_ies_expand(struct ieee80211_ies *ies) 823{ 824 uint8_t *ie; 825 int ielen; 826 827 ie = ies->data; 828 ielen = ies->len; 829 while (ielen > 0) { 830 switch (ie[0]) { 831 case IEEE80211_ELEMID_VENDOR: 832 if (iswpaoui(ie)) 833 ies->wpa_ie = ie; 834 else if (iswmeoui(ie)) 835 ies->wme_ie = ie; 836 else if (isatherosoui(ie)) 837 ies->ath_ie = ie; 838 break; 839 case IEEE80211_ELEMID_RSN: 840 ies->rsn_ie = ie; 841 break; 842 case IEEE80211_ELEMID_HTCAP: 843 ies->htcap_ie = ie; 844 break; 845 } 846 ielen -= 2 + ie[1]; 847 ie += 2 + ie[1]; 848 } 849} 850 851/* 852 * Reclaim any resources in a node and reset any critical 853 * state. Typically nodes are free'd immediately after, 854 * but in some cases the storage may be reused so we need 855 * to insure consistent state (should probably fix that). 856 */ 857static void 858node_cleanup(struct ieee80211_node *ni) 859{ 860#define N(a) (sizeof(a)/sizeof(a[0])) 861 struct ieee80211vap *vap = ni->ni_vap; 862 int i; 863 864 /* NB: preserve ni_table */ 865 if (ni->ni_flags & IEEE80211_NODE_PWR_MGT) { 866 if (vap->iv_opmode != IEEE80211_M_STA) 867 vap->iv_ps_sta--; 868 ni->ni_flags &= ~IEEE80211_NODE_PWR_MGT; 869 IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni, 870 "power save mode off, %u sta's in ps mode", vap->iv_ps_sta); 871 } 872 /* 873 * Cleanup any HT-related state. 874 */ 875 if (ni->ni_flags & IEEE80211_NODE_HT) 876 ieee80211_ht_node_cleanup(ni); 877 /* 878 * Clear AREF flag that marks the authorization refcnt bump 879 * has happened. This is probably not needed as the node 880 * should always be removed from the table so not found but 881 * do it just in case. 882 */ 883 ni->ni_flags &= ~IEEE80211_NODE_AREF; 884 885 /* 886 * Drain power save queue and, if needed, clear TIM. 887 */ 888 if (ieee80211_node_saveq_drain(ni) != 0 && vap->iv_set_tim != NULL) 889 vap->iv_set_tim(ni, 0); 890 891 ni->ni_associd = 0; 892 if (ni->ni_challenge != NULL) { 893 FREE(ni->ni_challenge, M_80211_NODE); 894 ni->ni_challenge = NULL; 895 } 896 /* 897 * Preserve SSID, WPA, and WME ie's so the bss node is 898 * reusable during a re-auth/re-assoc state transition. 899 * If we remove these data they will not be recreated 900 * because they come from a probe-response or beacon frame 901 * which cannot be expected prior to the association-response. 902 * This should not be an issue when operating in other modes 903 * as stations leaving always go through a full state transition 904 * which will rebuild this state. 905 * 906 * XXX does this leave us open to inheriting old state? 907 */ 908 for (i = 0; i < N(ni->ni_rxfrag); i++) 909 if (ni->ni_rxfrag[i] != NULL) { 910 m_freem(ni->ni_rxfrag[i]); 911 ni->ni_rxfrag[i] = NULL; 912 } 913 /* 914 * Must be careful here to remove any key map entry w/o a LOR. 915 */ 916 ieee80211_node_delucastkey(ni); 917#undef N 918} 919 920static void 921node_free(struct ieee80211_node *ni) 922{ 923 struct ieee80211com *ic = ni->ni_ic; 924 925 ic->ic_node_cleanup(ni); 926 ieee80211_ies_cleanup(&ni->ni_ies); 927 IEEE80211_NODE_SAVEQ_DESTROY(ni); 928 IEEE80211_NODE_WDSQ_DESTROY(ni); 929 FREE(ni, M_80211_NODE); 930} 931 932static void 933node_age(struct ieee80211_node *ni) 934{ 935 struct ieee80211vap *vap = ni->ni_vap; 936#if 0 937 IEEE80211_NODE_LOCK_ASSERT(&ic->ic_sta); 938#endif 939 /* 940 * Age frames on the power save queue. 941 */ 942 if (ieee80211_node_saveq_age(ni) != 0 && 943 IEEE80211_NODE_SAVEQ_QLEN(ni) == 0 && 944 vap->iv_set_tim != NULL) 945 vap->iv_set_tim(ni, 0); 946 /* 947 * Age frames on the wds pending queue. 948 */ 949 if (IEEE80211_NODE_WDSQ_QLEN(ni) != 0) 950 ieee80211_node_wdsq_age(ni); 951 /* 952 * Age out HT resources (e.g. frames on the 953 * A-MPDU reorder queues). 954 */ 955 if (ni->ni_associd != 0 && (ni->ni_flags & IEEE80211_NODE_HT)) 956 ieee80211_ht_node_age(ni); 957} 958 959static int8_t 960node_getrssi(const struct ieee80211_node *ni) 961{ 962 uint32_t avgrssi = ni->ni_avgrssi; 963 int32_t rssi; 964 965 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) 966 return 0; 967 rssi = IEEE80211_RSSI_GET(avgrssi); 968 return rssi < 0 ? 0 : rssi > 127 ? 127 : rssi; 969} 970 971static void 972node_getsignal(const struct ieee80211_node *ni, int8_t *rssi, int8_t *noise) 973{ 974 *rssi = node_getrssi(ni); 975 *noise = ni->ni_noise; 976} 977 978static void 979node_getmimoinfo(const struct ieee80211_node *ni, 980 struct ieee80211_mimo_info *info) 981{ 982 /* XXX zero data? */ 983} 984 985struct ieee80211_node * 986ieee80211_alloc_node(struct ieee80211_node_table *nt, 987 struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 988{ 989 struct ieee80211com *ic = nt->nt_ic; 990 struct ieee80211_node *ni; 991 int hash; 992 993 ni = ic->ic_node_alloc(vap, macaddr); 994 if (ni == NULL) { 995 vap->iv_stats.is_rx_nodealloc++; 996 return NULL; 997 } 998 999 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1000 "%s %p<%s> in %s table\n", __func__, ni, 1001 ether_sprintf(macaddr), nt->nt_name); 1002 1003 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1004 hash = IEEE80211_NODE_HASH(macaddr); 1005 ieee80211_node_initref(ni); /* mark referenced */ 1006 ni->ni_chan = IEEE80211_CHAN_ANYC; 1007 ni->ni_authmode = IEEE80211_AUTH_OPEN; 1008 ni->ni_txpower = ic->ic_txpowlimit; /* max power */ 1009 ni->ni_txparms = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)]; 1010 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE); 1011 ni->ni_avgrssi = IEEE80211_RSSI_DUMMY_MARKER; 1012 ni->ni_inact_reload = nt->nt_inact_init; 1013 ni->ni_inact = ni->ni_inact_reload; 1014 ni->ni_ath_defkeyix = 0x7fff; 1015 IEEE80211_NODE_SAVEQ_INIT(ni, "unknown"); 1016 IEEE80211_NODE_WDSQ_INIT(ni, "unknown"); 1017 1018 IEEE80211_NODE_LOCK(nt); 1019 TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list); 1020 LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash); 1021 ni->ni_table = nt; 1022 ni->ni_vap = vap; 1023 ni->ni_ic = ic; 1024 IEEE80211_NODE_UNLOCK(nt); 1025 1026 return ni; 1027} 1028 1029/* 1030 * Craft a temporary node suitable for sending a management frame 1031 * to the specified station. We craft only as much state as we 1032 * need to do the work since the node will be immediately reclaimed 1033 * once the send completes. 1034 */ 1035struct ieee80211_node * 1036ieee80211_tmp_node(struct ieee80211vap *vap, 1037 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1038{ 1039 struct ieee80211com *ic = vap->iv_ic; 1040 struct ieee80211_node *ni; 1041 1042 ni = ic->ic_node_alloc(vap, macaddr); 1043 if (ni != NULL) { 1044 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1045 "%s %p<%s>\n", __func__, ni, ether_sprintf(macaddr)); 1046 1047 ni->ni_table = NULL; /* NB: pedantic */ 1048 ni->ni_ic = ic; /* NB: needed to set channel */ 1049 ni->ni_vap = vap; 1050 1051 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1052 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_bss->ni_bssid); 1053 ieee80211_node_initref(ni); /* mark referenced */ 1054 /* NB: required by ieee80211_fix_rate */ 1055 ieee80211_node_set_chan(ni, vap->iv_bss->ni_chan); 1056 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, 1057 IEEE80211_KEYIX_NONE); 1058 /* XXX optimize away */ 1059 IEEE80211_NODE_SAVEQ_INIT(ni, "unknown"); 1060 IEEE80211_NODE_WDSQ_INIT(ni, "unknown"); 1061 } else { 1062 /* XXX msg */ 1063 vap->iv_stats.is_rx_nodealloc++; 1064 } 1065 return ni; 1066} 1067 1068struct ieee80211_node * 1069ieee80211_dup_bss(struct ieee80211vap *vap, 1070 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1071{ 1072 struct ieee80211com *ic = vap->iv_ic; 1073 struct ieee80211_node *ni; 1074 1075 ni = ieee80211_alloc_node(&ic->ic_sta, vap, macaddr); 1076 if (ni != NULL) { 1077 /* 1078 * Inherit from iv_bss. 1079 */ 1080 ni->ni_authmode = vap->iv_bss->ni_authmode; 1081 ni->ni_vlan = vap->iv_bss->ni_vlan; /* XXX?? */ 1082 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_bss->ni_bssid); 1083 ieee80211_node_set_chan(ni, vap->iv_bss->ni_chan); 1084 } 1085 return ni; 1086} 1087 1088/* 1089 * Create a bss node for a legacy WDS vap. The far end does 1090 * not associate so we just create create a new node and 1091 * simulate an association. The caller is responsible for 1092 * installing the node as the bss node and handling any further 1093 * setup work like authorizing the port. 1094 */ 1095struct ieee80211_node * 1096ieee80211_node_create_wds(struct ieee80211vap *vap, 1097 const uint8_t bssid[IEEE80211_ADDR_LEN], struct ieee80211_channel *chan) 1098{ 1099 struct ieee80211com *ic = vap->iv_ic; 1100 struct ieee80211_node *ni; 1101 1102 /* XXX check if node already in sta table? */ 1103 ni = ieee80211_alloc_node(&ic->ic_sta, vap, bssid); 1104 if (ni != NULL) { 1105 ni->ni_wdsvap = vap; 1106 IEEE80211_ADDR_COPY(ni->ni_bssid, bssid); 1107 /* 1108 * Inherit any manually configured settings. 1109 */ 1110 ni->ni_authmode = vap->iv_bss->ni_authmode; 1111 ni->ni_vlan = vap->iv_bss->ni_vlan; 1112 ieee80211_node_set_chan(ni, chan); 1113 /* NB: propagate ssid so available to WPA supplicant */ 1114 ni->ni_esslen = vap->iv_des_ssid[0].len; 1115 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen); 1116 /* NB: no associd for peer */ 1117 /* 1118 * There are no management frames to use to 1119 * discover neighbor capabilities, so blindly 1120 * propagate the local configuration. 1121 */ 1122 if (vap->iv_flags & IEEE80211_F_WME) 1123 ni->ni_flags |= IEEE80211_NODE_QOS; 1124 if (vap->iv_flags & IEEE80211_F_FF) 1125 ni->ni_flags |= IEEE80211_NODE_FF; 1126 if ((ic->ic_htcaps & IEEE80211_HTC_HT) && 1127 (vap->iv_flags_ext & IEEE80211_FEXT_HT)) { 1128 /* 1129 * Device is HT-capable and HT is enabled for 1130 * the vap; setup HT operation. On return 1131 * ni_chan will be adjusted to an HT channel. 1132 */ 1133 ieee80211_ht_wds_init(ni); 1134 } else { 1135 struct ieee80211_channel *c = ni->ni_chan; 1136 /* 1137 * Force a legacy channel to be used. 1138 */ 1139 c = ieee80211_find_channel(ic, 1140 c->ic_freq, c->ic_flags &~ IEEE80211_CHAN_HT); 1141 KASSERT(c != NULL, ("no legacy channel, %u/%x", 1142 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags)); 1143 ni->ni_chan = c; 1144 } 1145 } 1146 return ni; 1147} 1148 1149struct ieee80211_node * 1150#ifdef IEEE80211_DEBUG_REFCNT 1151ieee80211_find_node_locked_debug(struct ieee80211_node_table *nt, 1152 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1153#else 1154ieee80211_find_node_locked(struct ieee80211_node_table *nt, 1155 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1156#endif 1157{ 1158 struct ieee80211_node *ni; 1159 int hash; 1160 1161 IEEE80211_NODE_LOCK_ASSERT(nt); 1162 1163 hash = IEEE80211_NODE_HASH(macaddr); 1164 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1165 if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1166 ieee80211_ref_node(ni); /* mark referenced */ 1167#ifdef IEEE80211_DEBUG_REFCNT 1168 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1169 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1170 func, line, 1171 ni, ether_sprintf(ni->ni_macaddr), 1172 ieee80211_node_refcnt(ni)); 1173#endif 1174 return ni; 1175 } 1176 } 1177 return NULL; 1178} 1179 1180struct ieee80211_node * 1181#ifdef IEEE80211_DEBUG_REFCNT 1182ieee80211_find_node_debug(struct ieee80211_node_table *nt, 1183 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1184#else 1185ieee80211_find_node(struct ieee80211_node_table *nt, 1186 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1187#endif 1188{ 1189 struct ieee80211_node *ni; 1190 1191 IEEE80211_NODE_LOCK(nt); 1192 ni = ieee80211_find_node_locked(nt, macaddr); 1193 IEEE80211_NODE_UNLOCK(nt); 1194 return ni; 1195} 1196 1197struct ieee80211_node * 1198#ifdef IEEE80211_DEBUG_REFCNT 1199ieee80211_find_vap_node_locked_debug(struct ieee80211_node_table *nt, 1200 const struct ieee80211vap *vap, 1201 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1202#else 1203ieee80211_find_vap_node_locked(struct ieee80211_node_table *nt, 1204 const struct ieee80211vap *vap, 1205 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1206#endif 1207{ 1208 struct ieee80211_node *ni; 1209 int hash; 1210 1211 IEEE80211_NODE_LOCK_ASSERT(nt); 1212 1213 hash = IEEE80211_NODE_HASH(macaddr); 1214 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1215 if (ni->ni_vap == vap && 1216 IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1217 ieee80211_ref_node(ni); /* mark referenced */ 1218#ifdef IEEE80211_DEBUG_REFCNT 1219 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1220 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1221 func, line, 1222 ni, ether_sprintf(ni->ni_macaddr), 1223 ieee80211_node_refcnt(ni)); 1224#endif 1225 return ni; 1226 } 1227 } 1228 return NULL; 1229} 1230 1231struct ieee80211_node * 1232#ifdef IEEE80211_DEBUG_REFCNT 1233ieee80211_find_vap_node_debug(struct ieee80211_node_table *nt, 1234 const struct ieee80211vap *vap, 1235 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1236#else 1237ieee80211_find_vap_node(struct ieee80211_node_table *nt, 1238 const struct ieee80211vap *vap, 1239 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1240#endif 1241{ 1242 struct ieee80211_node *ni; 1243 1244 IEEE80211_NODE_LOCK(nt); 1245 ni = ieee80211_find_vap_node_locked(nt, vap, macaddr); 1246 IEEE80211_NODE_UNLOCK(nt); 1247 return ni; 1248} 1249 1250/* 1251 * Fake up a node; this handles node discovery in adhoc mode. 1252 * Note that for the driver's benefit we we treat this like 1253 * an association so the driver has an opportunity to setup 1254 * it's private state. 1255 */ 1256struct ieee80211_node * 1257ieee80211_fakeup_adhoc_node(struct ieee80211vap *vap, 1258 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1259{ 1260 struct ieee80211_node *ni; 1261 1262 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1263 "%s: mac<%s>\n", __func__, ether_sprintf(macaddr)); 1264 ni = ieee80211_dup_bss(vap, macaddr); 1265 if (ni != NULL) { 1266 struct ieee80211com *ic = vap->iv_ic; 1267 1268 /* XXX no rate negotiation; just dup */ 1269 ni->ni_rates = vap->iv_bss->ni_rates; 1270 if (vap->iv_opmode == IEEE80211_M_AHDEMO) { 1271 /* 1272 * In adhoc demo mode there are no management 1273 * frames to use to discover neighbor capabilities, 1274 * so blindly propagate the local configuration 1275 * so we can do interesting things (e.g. use 1276 * WME to disable ACK's). 1277 */ 1278 if (vap->iv_flags & IEEE80211_F_WME) 1279 ni->ni_flags |= IEEE80211_NODE_QOS; 1280 if (vap->iv_flags & IEEE80211_F_FF) 1281 ni->ni_flags |= IEEE80211_NODE_FF; 1282 } 1283 node_setuptxparms(ni); 1284 if (ic->ic_newassoc != NULL) 1285 ic->ic_newassoc(ni, 1); 1286 /* XXX not right for 802.1x/WPA */ 1287 ieee80211_node_authorize(ni); 1288 } 1289 return ni; 1290} 1291 1292void 1293ieee80211_init_neighbor(struct ieee80211_node *ni, 1294 const struct ieee80211_frame *wh, 1295 const struct ieee80211_scanparams *sp) 1296{ 1297 ni->ni_esslen = sp->ssid[1]; 1298 memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]); 1299 IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3); 1300 memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp)); 1301 ni->ni_intval = sp->bintval; 1302 ni->ni_capinfo = sp->capinfo; 1303 ni->ni_chan = ni->ni_ic->ic_curchan; 1304 ni->ni_fhdwell = sp->fhdwell; 1305 ni->ni_fhindex = sp->fhindex; 1306 ni->ni_erp = sp->erp; 1307 ni->ni_timoff = sp->timoff; 1308 1309 if (ieee80211_ies_init(&ni->ni_ies, sp->ies, sp->ies_len)) { 1310 ieee80211_ies_expand(&ni->ni_ies); 1311 if (ni->ni_ies.ath_ie != NULL) 1312 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 1313 } 1314 1315 /* NB: must be after ni_chan is setup */ 1316 ieee80211_setup_rates(ni, sp->rates, sp->xrates, 1317 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 1318 IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 1319} 1320 1321/* 1322 * Do node discovery in adhoc mode on receipt of a beacon 1323 * or probe response frame. Note that for the driver's 1324 * benefit we we treat this like an association so the 1325 * driver has an opportunity to setup it's private state. 1326 */ 1327struct ieee80211_node * 1328ieee80211_add_neighbor(struct ieee80211vap *vap, 1329 const struct ieee80211_frame *wh, 1330 const struct ieee80211_scanparams *sp) 1331{ 1332 struct ieee80211_node *ni; 1333 1334 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1335 "%s: mac<%s>\n", __func__, ether_sprintf(wh->i_addr2)); 1336 ni = ieee80211_dup_bss(vap, wh->i_addr2);/* XXX alloc_node? */ 1337 if (ni != NULL) { 1338 struct ieee80211com *ic = vap->iv_ic; 1339 1340 ieee80211_init_neighbor(ni, wh, sp); 1341 node_setuptxparms(ni); 1342 if (ic->ic_newassoc != NULL) 1343 ic->ic_newassoc(ni, 1); 1344 /* XXX not right for 802.1x/WPA */ 1345 ieee80211_node_authorize(ni); 1346 } 1347 return ni; 1348} 1349 1350#define IS_CTL(wh) \ 1351 ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) == IEEE80211_FC0_TYPE_CTL) 1352#define IS_PSPOLL(wh) \ 1353 ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == IEEE80211_FC0_SUBTYPE_PS_POLL) 1354#define IS_BAR(wh) \ 1355 ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == IEEE80211_FC0_SUBTYPE_BAR) 1356#define IS_PROBEREQ(wh) \ 1357 ((wh->i_fc[0] & (IEEE80211_FC0_TYPE_MASK|IEEE80211_FC0_SUBTYPE_MASK)) \ 1358 == (IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ)) 1359#define IS_BCAST_PROBEREQ(wh) \ 1360 (IS_PROBEREQ(wh) && IEEE80211_IS_MULTICAST( \ 1361 ((const struct ieee80211_frame *)(wh))->i_addr3)) 1362 1363static __inline struct ieee80211_node * 1364_find_rxnode(struct ieee80211_node_table *nt, 1365 const struct ieee80211_frame_min *wh) 1366{ 1367 /* XXX 4-address frames? */ 1368 if (IS_CTL(wh) && !IS_PSPOLL(wh) && !IS_BAR(wh) /*&& !IS_RTS(ah)*/) 1369 return ieee80211_find_node_locked(nt, wh->i_addr1); 1370 if (IS_BCAST_PROBEREQ(wh)) 1371 return NULL; /* spam bcast probe req to all vap's */ 1372 return ieee80211_find_node_locked(nt, wh->i_addr2); 1373} 1374 1375/* 1376 * Locate the node for sender, track state, and then pass the 1377 * (referenced) node up to the 802.11 layer for its use. Note 1378 * we can return NULL if the sender is not in the table. 1379 */ 1380struct ieee80211_node * 1381#ifdef IEEE80211_DEBUG_REFCNT 1382ieee80211_find_rxnode_debug(struct ieee80211com *ic, 1383 const struct ieee80211_frame_min *wh, const char *func, int line) 1384#else 1385ieee80211_find_rxnode(struct ieee80211com *ic, 1386 const struct ieee80211_frame_min *wh) 1387#endif 1388{ 1389 struct ieee80211_node_table *nt; 1390 struct ieee80211_node *ni; 1391 1392 nt = &ic->ic_sta; 1393 IEEE80211_NODE_LOCK(nt); 1394 ni = _find_rxnode(nt, wh); 1395 IEEE80211_NODE_UNLOCK(nt); 1396 1397 return ni; 1398} 1399 1400/* 1401 * Like ieee80211_find_rxnode but use the supplied h/w 1402 * key index as a hint to locate the node in the key 1403 * mapping table. If an entry is present at the key 1404 * index we return it; otherwise do a normal lookup and 1405 * update the mapping table if the station has a unicast 1406 * key assigned to it. 1407 */ 1408struct ieee80211_node * 1409#ifdef IEEE80211_DEBUG_REFCNT 1410ieee80211_find_rxnode_withkey_debug(struct ieee80211com *ic, 1411 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix, 1412 const char *func, int line) 1413#else 1414ieee80211_find_rxnode_withkey(struct ieee80211com *ic, 1415 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix) 1416#endif 1417{ 1418 struct ieee80211_node_table *nt; 1419 struct ieee80211_node *ni; 1420 1421 nt = &ic->ic_sta; 1422 IEEE80211_NODE_LOCK(nt); 1423 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) 1424 ni = nt->nt_keyixmap[keyix]; 1425 else 1426 ni = NULL; 1427 if (ni == NULL) { 1428 ni = _find_rxnode(nt, wh); 1429 if (ni != NULL && nt->nt_keyixmap != NULL) { 1430 /* 1431 * If the station has a unicast key cache slot 1432 * assigned update the key->node mapping table. 1433 */ 1434 keyix = ni->ni_ucastkey.wk_rxkeyix; 1435 /* XXX can keyixmap[keyix] != NULL? */ 1436 if (keyix < nt->nt_keyixmax && 1437 nt->nt_keyixmap[keyix] == NULL) { 1438 IEEE80211_DPRINTF(ni->ni_vap, 1439 IEEE80211_MSG_NODE, 1440 "%s: add key map entry %p<%s> refcnt %d\n", 1441 __func__, ni, ether_sprintf(ni->ni_macaddr), 1442 ieee80211_node_refcnt(ni)+1); 1443 nt->nt_keyixmap[keyix] = ieee80211_ref_node(ni); 1444 } 1445 } 1446 } else { 1447 if (IS_BCAST_PROBEREQ(wh)) 1448 ni = NULL; /* spam bcast probe req to all vap's */ 1449 else 1450 ieee80211_ref_node(ni); 1451 } 1452 IEEE80211_NODE_UNLOCK(nt); 1453 1454 return ni; 1455} 1456#undef IS_BCAST_PROBEREQ 1457#undef IS_PROBEREQ 1458#undef IS_BAR 1459#undef IS_PSPOLL 1460#undef IS_CTL 1461 1462/* 1463 * Return a reference to the appropriate node for sending 1464 * a data frame. This handles node discovery in adhoc networks. 1465 */ 1466struct ieee80211_node * 1467#ifdef IEEE80211_DEBUG_REFCNT 1468ieee80211_find_txnode_debug(struct ieee80211vap *vap, 1469 const uint8_t macaddr[IEEE80211_ADDR_LEN], 1470 const char *func, int line) 1471#else 1472ieee80211_find_txnode(struct ieee80211vap *vap, 1473 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1474#endif 1475{ 1476 struct ieee80211_node_table *nt = &vap->iv_ic->ic_sta; 1477 struct ieee80211_node *ni; 1478 1479 /* 1480 * The destination address should be in the node table 1481 * unless this is a multicast/broadcast frame. We can 1482 * also optimize station mode operation, all frames go 1483 * to the bss node. 1484 */ 1485 /* XXX can't hold lock across dup_bss 'cuz of recursive locking */ 1486 IEEE80211_NODE_LOCK(nt); 1487 if (vap->iv_opmode == IEEE80211_M_STA || 1488 vap->iv_opmode == IEEE80211_M_WDS || 1489 IEEE80211_IS_MULTICAST(macaddr)) 1490 ni = ieee80211_ref_node(vap->iv_bss); 1491 else { 1492 ni = ieee80211_find_node_locked(nt, macaddr); 1493 if (vap->iv_opmode == IEEE80211_M_HOSTAP && 1494 (ni != NULL && ni->ni_associd == 0)) { 1495 /* 1496 * Station is not associated; don't permit the 1497 * data frame to be sent by returning NULL. This 1498 * is kinda a kludge but the least intrusive way 1499 * to add this check into all drivers. 1500 */ 1501 ieee80211_unref_node(&ni); /* NB: null's ni */ 1502 } 1503 } 1504 IEEE80211_NODE_UNLOCK(nt); 1505 1506 if (ni == NULL) { 1507 if (vap->iv_opmode == IEEE80211_M_IBSS || 1508 vap->iv_opmode == IEEE80211_M_AHDEMO) { 1509 /* 1510 * In adhoc mode cons up a node for the destination. 1511 * Note that we need an additional reference for the 1512 * caller to be consistent with 1513 * ieee80211_find_node_locked. 1514 */ 1515 ni = ieee80211_fakeup_adhoc_node(vap, macaddr); 1516 if (ni != NULL) 1517 (void) ieee80211_ref_node(ni); 1518 } else { 1519 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, macaddr, 1520 "no node, discard frame (%s)", __func__); 1521 vap->iv_stats.is_tx_nonode++; 1522 } 1523 } 1524 return ni; 1525} 1526 1527static void 1528_ieee80211_free_node(struct ieee80211_node *ni) 1529{ 1530 struct ieee80211_node_table *nt = ni->ni_table; 1531 1532 /* 1533 * NB: careful about referencing the vap as it may be 1534 * gone if the last reference was held by a driver. 1535 * We know the com will always be present so it's safe 1536 * to use ni_ic below to reclaim resources. 1537 */ 1538#if 0 1539 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1540 "%s %p<%s> in %s table\n", __func__, ni, 1541 ether_sprintf(ni->ni_macaddr), 1542 nt != NULL ? nt->nt_name : "<gone>"); 1543#endif 1544 if (ni->ni_associd != 0) { 1545 struct ieee80211vap *vap = ni->ni_vap; 1546 if (vap->iv_aid_bitmap != NULL) 1547 IEEE80211_AID_CLR(vap, ni->ni_associd); 1548 } 1549 if (nt != NULL) { 1550 TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1551 LIST_REMOVE(ni, ni_hash); 1552 } 1553 ni->ni_ic->ic_node_free(ni); 1554} 1555 1556void 1557#ifdef IEEE80211_DEBUG_REFCNT 1558ieee80211_free_node_debug(struct ieee80211_node *ni, const char *func, int line) 1559#else 1560ieee80211_free_node(struct ieee80211_node *ni) 1561#endif 1562{ 1563 struct ieee80211_node_table *nt = ni->ni_table; 1564 1565#ifdef IEEE80211_DEBUG_REFCNT 1566 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1567 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni, 1568 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1); 1569#endif 1570 if (nt != NULL) { 1571 IEEE80211_NODE_LOCK(nt); 1572 if (ieee80211_node_dectestref(ni)) { 1573 /* 1574 * Last reference, reclaim state. 1575 */ 1576 _ieee80211_free_node(ni); 1577 } else if (ieee80211_node_refcnt(ni) == 1 && 1578 nt->nt_keyixmap != NULL) { 1579 ieee80211_keyix keyix; 1580 /* 1581 * Check for a last reference in the key mapping table. 1582 */ 1583 keyix = ni->ni_ucastkey.wk_rxkeyix; 1584 if (keyix < nt->nt_keyixmax && 1585 nt->nt_keyixmap[keyix] == ni) { 1586 IEEE80211_DPRINTF(ni->ni_vap, 1587 IEEE80211_MSG_NODE, 1588 "%s: %p<%s> clear key map entry", __func__, 1589 ni, ether_sprintf(ni->ni_macaddr)); 1590 nt->nt_keyixmap[keyix] = NULL; 1591 ieee80211_node_decref(ni); /* XXX needed? */ 1592 _ieee80211_free_node(ni); 1593 } 1594 } 1595 IEEE80211_NODE_UNLOCK(nt); 1596 } else { 1597 if (ieee80211_node_dectestref(ni)) 1598 _ieee80211_free_node(ni); 1599 } 1600} 1601 1602/* 1603 * Reclaim a unicast key and clear any key cache state. 1604 */ 1605int 1606ieee80211_node_delucastkey(struct ieee80211_node *ni) 1607{ 1608 struct ieee80211com *ic = ni->ni_ic; 1609 struct ieee80211_node_table *nt = &ic->ic_sta; 1610 struct ieee80211_node *nikey; 1611 ieee80211_keyix keyix; 1612 int isowned, status; 1613 1614 /* 1615 * NB: We must beware of LOR here; deleting the key 1616 * can cause the crypto layer to block traffic updates 1617 * which can generate a LOR against the node table lock; 1618 * grab it here and stash the key index for our use below. 1619 * 1620 * Must also beware of recursion on the node table lock. 1621 * When called from node_cleanup we may already have 1622 * the node table lock held. Unfortunately there's no 1623 * way to separate out this path so we must do this 1624 * conditionally. 1625 */ 1626 isowned = IEEE80211_NODE_IS_LOCKED(nt); 1627 if (!isowned) 1628 IEEE80211_NODE_LOCK(nt); 1629 nikey = NULL; 1630 status = 1; /* NB: success */ 1631 if (!IEEE80211_KEY_UNDEFINED(&ni->ni_ucastkey)) { 1632 keyix = ni->ni_ucastkey.wk_rxkeyix; 1633 status = ieee80211_crypto_delkey(ni->ni_vap, &ni->ni_ucastkey); 1634 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) { 1635 nikey = nt->nt_keyixmap[keyix]; 1636 nt->nt_keyixmap[keyix] = NULL;; 1637 } 1638 } 1639 if (!isowned) 1640 IEEE80211_NODE_UNLOCK(nt); 1641 1642 if (nikey != NULL) { 1643 KASSERT(nikey == ni, 1644 ("key map out of sync, ni %p nikey %p", ni, nikey)); 1645 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1646 "%s: delete key map entry %p<%s> refcnt %d\n", 1647 __func__, ni, ether_sprintf(ni->ni_macaddr), 1648 ieee80211_node_refcnt(ni)-1); 1649 ieee80211_free_node(ni); 1650 } 1651 return status; 1652} 1653 1654/* 1655 * Reclaim a node. If this is the last reference count then 1656 * do the normal free work. Otherwise remove it from the node 1657 * table and mark it gone by clearing the back-reference. 1658 */ 1659static void 1660node_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 1661{ 1662 ieee80211_keyix keyix; 1663 1664 IEEE80211_NODE_LOCK_ASSERT(nt); 1665 1666 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1667 "%s: remove %p<%s> from %s table, refcnt %d\n", 1668 __func__, ni, ether_sprintf(ni->ni_macaddr), 1669 nt->nt_name, ieee80211_node_refcnt(ni)-1); 1670 /* 1671 * Clear any entry in the unicast key mapping table. 1672 * We need to do it here so rx lookups don't find it 1673 * in the mapping table even if it's not in the hash 1674 * table. We cannot depend on the mapping table entry 1675 * being cleared because the node may not be free'd. 1676 */ 1677 keyix = ni->ni_ucastkey.wk_rxkeyix; 1678 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax && 1679 nt->nt_keyixmap[keyix] == ni) { 1680 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1681 "%s: %p<%s> clear key map entry\n", 1682 __func__, ni, ether_sprintf(ni->ni_macaddr)); 1683 nt->nt_keyixmap[keyix] = NULL; 1684 ieee80211_node_decref(ni); /* NB: don't need free */ 1685 } 1686 if (!ieee80211_node_dectestref(ni)) { 1687 /* 1688 * Other references are present, just remove the 1689 * node from the table so it cannot be found. When 1690 * the references are dropped storage will be 1691 * reclaimed. 1692 */ 1693 TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1694 LIST_REMOVE(ni, ni_hash); 1695 ni->ni_table = NULL; /* clear reference */ 1696 } else 1697 _ieee80211_free_node(ni); 1698} 1699 1700/* 1701 * Reclaim a (bss) node. Decrement the refcnt and reclaim 1702 * the node if the only other reference to it is in the sta 1703 * table. This is effectively ieee80211_free_node followed 1704 * by node_reclaim when the refcnt is 1 (after the free). 1705 */ 1706static void 1707ieee80211_node_reclaim(struct ieee80211_node *ni) 1708{ 1709 struct ieee80211_node_table *nt = ni->ni_table; 1710 1711 KASSERT(nt != NULL, ("reclaim node not in table")); 1712 1713#ifdef IEEE80211_DEBUG_REFCNT 1714 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1715 "%s %p<%s> refcnt %d\n", __func__, ni, 1716 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1); 1717#endif 1718 IEEE80211_NODE_LOCK(nt); 1719 if (ieee80211_node_dectestref(ni)) { 1720 /* 1721 * Last reference, reclaim state. 1722 */ 1723 _ieee80211_free_node(ni); 1724 nt = NULL; 1725 } else if (ieee80211_node_refcnt(ni) == 1 && 1726 nt->nt_keyixmap != NULL) { 1727 ieee80211_keyix keyix; 1728 /* 1729 * Check for a last reference in the key mapping table. 1730 */ 1731 keyix = ni->ni_ucastkey.wk_rxkeyix; 1732 if (keyix < nt->nt_keyixmax && 1733 nt->nt_keyixmap[keyix] == ni) { 1734 IEEE80211_DPRINTF(ni->ni_vap, 1735 IEEE80211_MSG_NODE, 1736 "%s: %p<%s> clear key map entry", __func__, 1737 ni, ether_sprintf(ni->ni_macaddr)); 1738 nt->nt_keyixmap[keyix] = NULL; 1739 ieee80211_node_decref(ni); /* XXX needed? */ 1740 _ieee80211_free_node(ni); 1741 nt = NULL; 1742 } 1743 } 1744 if (nt != NULL && ieee80211_node_refcnt(ni) == 1) { 1745 /* 1746 * Last reference is in the sta table; complete 1747 * the reclaim. This handles bss nodes being 1748 * recycled: the node has two references, one for 1749 * iv_bss and one for the table. After dropping 1750 * the iv_bss ref above we need to reclaim the sta 1751 * table reference. 1752 */ 1753 ieee80211_node_decref(ni); /* NB: be pendantic */ 1754 _ieee80211_free_node(ni); 1755 } 1756 IEEE80211_NODE_UNLOCK(nt); 1757} 1758 1759/* 1760 * Node table support. 1761 */ 1762 1763static void 1764ieee80211_node_table_init(struct ieee80211com *ic, 1765 struct ieee80211_node_table *nt, 1766 const char *name, int inact, int keyixmax) 1767{ 1768 struct ifnet *ifp = ic->ic_ifp; 1769 1770 nt->nt_ic = ic; 1771 IEEE80211_NODE_LOCK_INIT(nt, ifp->if_xname); 1772 IEEE80211_NODE_ITERATE_LOCK_INIT(nt, ifp->if_xname); 1773 TAILQ_INIT(&nt->nt_node); 1774 nt->nt_name = name; 1775 nt->nt_scangen = 1; 1776 nt->nt_inact_init = inact; 1777 nt->nt_keyixmax = keyixmax; 1778 if (nt->nt_keyixmax > 0) { 1779 MALLOC(nt->nt_keyixmap, struct ieee80211_node **, 1780 keyixmax * sizeof(struct ieee80211_node *), 1781 M_80211_NODE, M_NOWAIT | M_ZERO); 1782 if (nt->nt_keyixmap == NULL) 1783 if_printf(ic->ic_ifp, 1784 "Cannot allocate key index map with %u entries\n", 1785 keyixmax); 1786 } else 1787 nt->nt_keyixmap = NULL; 1788} 1789 1790static void 1791ieee80211_node_table_reset(struct ieee80211_node_table *nt, 1792 struct ieee80211vap *match) 1793{ 1794 struct ieee80211_node *ni, *next; 1795 1796 IEEE80211_NODE_LOCK(nt); 1797 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) { 1798 if (match != NULL && ni->ni_vap != match) 1799 continue; 1800 /* XXX can this happen? if so need's work */ 1801 if (ni->ni_associd != 0) { 1802 struct ieee80211vap *vap = ni->ni_vap; 1803 1804 if (vap->iv_auth->ia_node_leave != NULL) 1805 vap->iv_auth->ia_node_leave(ni); 1806 if (vap->iv_aid_bitmap != NULL) 1807 IEEE80211_AID_CLR(vap, ni->ni_associd); 1808 } 1809 ni->ni_wdsvap = NULL; /* clear reference */ 1810 node_reclaim(nt, ni); 1811 } 1812 if (match != NULL && match->iv_opmode == IEEE80211_M_WDS) { 1813 /* 1814 * Make a separate pass to clear references to this vap 1815 * held by DWDS entries. They will not be matched above 1816 * because ni_vap will point to the ap vap but we still 1817 * need to clear ni_wdsvap when the WDS vap is destroyed 1818 * and/or reset. 1819 */ 1820 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) 1821 if (ni->ni_wdsvap == match) 1822 ni->ni_wdsvap = NULL; 1823 } 1824 IEEE80211_NODE_UNLOCK(nt); 1825} 1826 1827static void 1828ieee80211_node_table_cleanup(struct ieee80211_node_table *nt) 1829{ 1830 ieee80211_node_table_reset(nt, NULL); 1831 if (nt->nt_keyixmap != NULL) { 1832#ifdef DIAGNOSTIC 1833 /* XXX verify all entries are NULL */ 1834 int i; 1835 for (i = 0; i < nt->nt_keyixmax; i++) 1836 if (nt->nt_keyixmap[i] != NULL) 1837 printf("%s: %s[%u] still active\n", __func__, 1838 nt->nt_name, i); 1839#endif 1840 FREE(nt->nt_keyixmap, M_80211_NODE); 1841 nt->nt_keyixmap = NULL; 1842 } 1843 IEEE80211_NODE_ITERATE_LOCK_DESTROY(nt); 1844 IEEE80211_NODE_LOCK_DESTROY(nt); 1845} 1846 1847/* 1848 * Timeout inactive stations and do related housekeeping. 1849 * Note that we cannot hold the node lock while sending a 1850 * frame as this would lead to a LOR. Instead we use a 1851 * generation number to mark nodes that we've scanned and 1852 * drop the lock and restart a scan if we have to time out 1853 * a node. Since we are single-threaded by virtue of 1854 * controlling the inactivity timer we can be sure this will 1855 * process each node only once. 1856 */ 1857static void 1858ieee80211_timeout_stations(struct ieee80211com *ic) 1859{ 1860 struct ieee80211_node_table *nt = &ic->ic_sta; 1861 struct ieee80211vap *vap; 1862 struct ieee80211_node *ni; 1863 int gen = 0; 1864 1865 IEEE80211_NODE_ITERATE_LOCK(nt); 1866 gen = ++nt->nt_scangen; 1867restart: 1868 IEEE80211_NODE_LOCK(nt); 1869 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 1870 if (ni->ni_scangen == gen) /* previously handled */ 1871 continue; 1872 ni->ni_scangen = gen; 1873 /* 1874 * Ignore entries for which have yet to receive an 1875 * authentication frame. These are transient and 1876 * will be reclaimed when the last reference to them 1877 * goes away (when frame xmits complete). 1878 */ 1879 vap = ni->ni_vap; 1880 /* 1881 * Only process stations when in RUN state. This 1882 * insures, for example, that we don't timeout an 1883 * inactive station during CAC. Note that CSA state 1884 * is actually handled in ieee80211_node_timeout as 1885 * it applies to more than timeout processing. 1886 */ 1887 if (vap->iv_state != IEEE80211_S_RUN) 1888 continue; 1889 /* XXX can vap be NULL? */ 1890 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 1891 vap->iv_opmode == IEEE80211_M_STA) && 1892 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 1893 continue; 1894 /* 1895 * Free fragment if not needed anymore 1896 * (last fragment older than 1s). 1897 * XXX doesn't belong here, move to node_age 1898 */ 1899 if (ni->ni_rxfrag[0] != NULL && 1900 ticks > ni->ni_rxfragstamp + hz) { 1901 m_freem(ni->ni_rxfrag[0]); 1902 ni->ni_rxfrag[0] = NULL; 1903 } 1904 if (ni->ni_inact > 0) 1905 ni->ni_inact--; 1906 /* 1907 * Special case ourself; we may be idle for extended periods 1908 * of time and regardless reclaiming our state is wrong. 1909 * XXX run ic_node_age 1910 */ 1911 if (ni == vap->iv_bss) 1912 continue; 1913 if (ni->ni_associd != 0 || 1914 (vap->iv_opmode == IEEE80211_M_IBSS || 1915 vap->iv_opmode == IEEE80211_M_AHDEMO)) { 1916 /* 1917 * Age/drain resources held by the station. 1918 */ 1919 ic->ic_node_age(ni); 1920 /* 1921 * Probe the station before time it out. We 1922 * send a null data frame which may not be 1923 * universally supported by drivers (need it 1924 * for ps-poll support so it should be...). 1925 * 1926 * XXX don't probe the station unless we've 1927 * received a frame from them (and have 1928 * some idea of the rates they are capable 1929 * of); this will get fixed more properly 1930 * soon with better handling of the rate set. 1931 */ 1932 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 1933 (0 < ni->ni_inact && 1934 ni->ni_inact <= vap->iv_inact_probe) && 1935 ni->ni_rates.rs_nrates != 0) { 1936 IEEE80211_NOTE(vap, 1937 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, 1938 ni, "%s", 1939 "probe station due to inactivity"); 1940 /* 1941 * Grab a reference before unlocking the table 1942 * so the node cannot be reclaimed before we 1943 * send the frame. ieee80211_send_nulldata 1944 * understands we've done this and reclaims the 1945 * ref for us as needed. 1946 */ 1947 ieee80211_ref_node(ni); 1948 IEEE80211_NODE_UNLOCK(nt); 1949 ieee80211_send_nulldata(ni); 1950 /* XXX stat? */ 1951 goto restart; 1952 } 1953 } 1954 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 1955 ni->ni_inact <= 0) { 1956 IEEE80211_NOTE(vap, 1957 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, ni, 1958 "station timed out due to inactivity " 1959 "(refcnt %u)", ieee80211_node_refcnt(ni)); 1960 /* 1961 * Send a deauthenticate frame and drop the station. 1962 * This is somewhat complicated due to reference counts 1963 * and locking. At this point a station will typically 1964 * have a reference count of 1. ieee80211_node_leave 1965 * will do a "free" of the node which will drop the 1966 * reference count. But in the meantime a reference 1967 * wil be held by the deauth frame. The actual reclaim 1968 * of the node will happen either after the tx is 1969 * completed or by ieee80211_node_leave. 1970 * 1971 * Separately we must drop the node lock before sending 1972 * in case the driver takes a lock, as this can result 1973 * in a LOR between the node lock and the driver lock. 1974 */ 1975 ieee80211_ref_node(ni); 1976 IEEE80211_NODE_UNLOCK(nt); 1977 if (ni->ni_associd != 0) { 1978 IEEE80211_SEND_MGMT(ni, 1979 IEEE80211_FC0_SUBTYPE_DEAUTH, 1980 IEEE80211_REASON_AUTH_EXPIRE); 1981 } 1982 ieee80211_node_leave(ni); 1983 ieee80211_free_node(ni); 1984 vap->iv_stats.is_node_timeout++; 1985 goto restart; 1986 } 1987 } 1988 IEEE80211_NODE_UNLOCK(nt); 1989 1990 IEEE80211_NODE_ITERATE_UNLOCK(nt); 1991} 1992 1993/* 1994 * Aggressively reclaim resources. This should be used 1995 * only in a critical situation to reclaim mbuf resources. 1996 */ 1997void 1998ieee80211_drain(struct ieee80211com *ic) 1999{ 2000 struct ieee80211_node_table *nt = &ic->ic_sta; 2001 struct ieee80211vap *vap; 2002 struct ieee80211_node *ni; 2003 2004 IEEE80211_NODE_LOCK(nt); 2005 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2006 /* 2007 * Ignore entries for which have yet to receive an 2008 * authentication frame. These are transient and 2009 * will be reclaimed when the last reference to them 2010 * goes away (when frame xmits complete). 2011 */ 2012 vap = ni->ni_vap; 2013 /* 2014 * Only process stations when in RUN state. This 2015 * insures, for example, that we don't timeout an 2016 * inactive station during CAC. Note that CSA state 2017 * is actually handled in ieee80211_node_timeout as 2018 * it applies to more than timeout processing. 2019 */ 2020 if (vap->iv_state != IEEE80211_S_RUN) 2021 continue; 2022 /* XXX can vap be NULL? */ 2023 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 2024 vap->iv_opmode == IEEE80211_M_STA) && 2025 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 2026 continue; 2027 /* 2028 * Free fragments. 2029 * XXX doesn't belong here, move to node_drain 2030 */ 2031 if (ni->ni_rxfrag[0] != NULL) { 2032 m_freem(ni->ni_rxfrag[0]); 2033 ni->ni_rxfrag[0] = NULL; 2034 } 2035 /* 2036 * Drain resources held by the station. 2037 */ 2038 ic->ic_node_drain(ni); 2039 } 2040 IEEE80211_NODE_UNLOCK(nt); 2041} 2042 2043/* 2044 * Per-ieee80211com inactivity timer callback. 2045 */ 2046void 2047ieee80211_node_timeout(void *arg) 2048{ 2049 struct ieee80211com *ic = arg; 2050 2051 /* 2052 * Defer timeout processing if a channel switch is pending. 2053 * We typically need to be mute so not doing things that 2054 * might generate frames is good to handle in one place. 2055 * Supressing the station timeout processing may extend the 2056 * lifetime of inactive stations (by not decrementing their 2057 * idle counters) but this should be ok unless the CSA is 2058 * active for an unusually long time. 2059 */ 2060 if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) { 2061 ieee80211_scan_timeout(ic); 2062 ieee80211_timeout_stations(ic); 2063 2064 IEEE80211_LOCK(ic); 2065 ieee80211_erp_timeout(ic); 2066 ieee80211_ht_timeout(ic); 2067 IEEE80211_UNLOCK(ic); 2068 } 2069 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, 2070 ieee80211_node_timeout, ic); 2071} 2072 2073void 2074ieee80211_iterate_nodes(struct ieee80211_node_table *nt, 2075 ieee80211_iter_func *f, void *arg) 2076{ 2077 struct ieee80211_node *ni; 2078 u_int gen; 2079 2080 IEEE80211_NODE_ITERATE_LOCK(nt); 2081 gen = ++nt->nt_scangen; 2082restart: 2083 IEEE80211_NODE_LOCK(nt); 2084 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2085 if (ni->ni_scangen != gen) { 2086 ni->ni_scangen = gen; 2087 (void) ieee80211_ref_node(ni); 2088 IEEE80211_NODE_UNLOCK(nt); 2089 (*f)(arg, ni); 2090 ieee80211_free_node(ni); 2091 goto restart; 2092 } 2093 } 2094 IEEE80211_NODE_UNLOCK(nt); 2095 2096 IEEE80211_NODE_ITERATE_UNLOCK(nt); 2097} 2098 2099void 2100ieee80211_dump_node(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 2101{ 2102 printf("0x%p: mac %s refcnt %d\n", ni, 2103 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)); 2104 printf("\tscangen %u authmode %u flags 0x%x\n", 2105 ni->ni_scangen, ni->ni_authmode, ni->ni_flags); 2106 printf("\tassocid 0x%x txpower %u vlan %u\n", 2107 ni->ni_associd, ni->ni_txpower, ni->ni_vlan); 2108 printf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n", 2109 ni->ni_txseqs[IEEE80211_NONQOS_TID], 2110 ni->ni_rxseqs[IEEE80211_NONQOS_TID] >> IEEE80211_SEQ_SEQ_SHIFT, 2111 ni->ni_rxseqs[IEEE80211_NONQOS_TID] & IEEE80211_SEQ_FRAG_MASK, 2112 ni->ni_rxfragstamp); 2113 printf("\trstamp %u rssi %d noise %d intval %u capinfo 0x%x\n", 2114 ni->ni_rstamp, node_getrssi(ni), ni->ni_noise, 2115 ni->ni_intval, ni->ni_capinfo); 2116 printf("\tbssid %s essid \"%.*s\" channel %u:0x%x\n", 2117 ether_sprintf(ni->ni_bssid), 2118 ni->ni_esslen, ni->ni_essid, 2119 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags); 2120 printf("\tinact %u txrate %u\n", 2121 ni->ni_inact, ni->ni_txrate); 2122 printf("\thtcap %x htparam %x htctlchan %u ht2ndchan %u\n", 2123 ni->ni_htcap, ni->ni_htparam, 2124 ni->ni_htctlchan, ni->ni_ht2ndchan); 2125 printf("\thtopmode %x htstbc %x chw %u\n", 2126 ni->ni_htopmode, ni->ni_htstbc, ni->ni_chw); 2127} 2128 2129void 2130ieee80211_dump_nodes(struct ieee80211_node_table *nt) 2131{ 2132 ieee80211_iterate_nodes(nt, 2133 (ieee80211_iter_func *) ieee80211_dump_node, nt); 2134} 2135 2136static void 2137ieee80211_notify_erp_locked(struct ieee80211com *ic) 2138{ 2139 struct ieee80211vap *vap; 2140 2141 IEEE80211_LOCK_ASSERT(ic); 2142 2143 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 2144 if (vap->iv_opmode == IEEE80211_M_HOSTAP) 2145 ieee80211_beacon_notify(vap, IEEE80211_BEACON_ERP); 2146} 2147 2148void 2149ieee80211_notify_erp(struct ieee80211com *ic) 2150{ 2151 IEEE80211_LOCK(ic); 2152 ieee80211_notify_erp_locked(ic); 2153 IEEE80211_UNLOCK(ic); 2154} 2155 2156/* 2157 * Handle a station joining an 11g network. 2158 */ 2159static void 2160ieee80211_node_join_11g(struct ieee80211_node *ni) 2161{ 2162 struct ieee80211com *ic = ni->ni_ic; 2163 2164 IEEE80211_LOCK_ASSERT(ic); 2165 2166 /* 2167 * Station isn't capable of short slot time. Bump 2168 * the count of long slot time stations and disable 2169 * use of short slot time. Note that the actual switch 2170 * over to long slot time use may not occur until the 2171 * next beacon transmission (per sec. 7.3.1.4 of 11g). 2172 */ 2173 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2174 ic->ic_longslotsta++; 2175 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2176 "station needs long slot time, count %d", 2177 ic->ic_longslotsta); 2178 /* XXX vap's w/ conflicting needs won't work */ 2179 if (!IEEE80211_IS_CHAN_108G(ic->ic_bsschan)) { 2180 /* 2181 * Don't force slot time when switched to turbo 2182 * mode as non-ERP stations won't be present; this 2183 * need only be done when on the normal G channel. 2184 */ 2185 ieee80211_set_shortslottime(ic, 0); 2186 } 2187 } 2188 /* 2189 * If the new station is not an ERP station 2190 * then bump the counter and enable protection 2191 * if configured. 2192 */ 2193 if (!ieee80211_iserp_rateset(&ni->ni_rates)) { 2194 ic->ic_nonerpsta++; 2195 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2196 "station is !ERP, %d non-ERP stations associated", 2197 ic->ic_nonerpsta); 2198 /* 2199 * If station does not support short preamble 2200 * then we must enable use of Barker preamble. 2201 */ 2202 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) { 2203 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2204 "%s", "station needs long preamble"); 2205 ic->ic_flags |= IEEE80211_F_USEBARKER; 2206 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; 2207 } 2208 /* 2209 * If protection is configured and this is the first 2210 * indication we should use protection, enable it. 2211 */ 2212 if (ic->ic_protmode != IEEE80211_PROT_NONE && 2213 ic->ic_nonerpsta == 1 && 2214 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2215 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2216 "%s: enable use of protection\n", __func__); 2217 ic->ic_flags |= IEEE80211_F_USEPROT; 2218 ieee80211_notify_erp_locked(ic); 2219 } 2220 } else 2221 ni->ni_flags |= IEEE80211_NODE_ERP; 2222} 2223 2224void 2225ieee80211_node_join(struct ieee80211_node *ni, int resp) 2226{ 2227 struct ieee80211com *ic = ni->ni_ic; 2228 struct ieee80211vap *vap = ni->ni_vap; 2229 int newassoc; 2230 2231 if (ni->ni_associd == 0) { 2232 uint16_t aid; 2233 2234 KASSERT(vap->iv_aid_bitmap != NULL, ("no aid bitmap")); 2235 /* 2236 * It would be good to search the bitmap 2237 * more efficiently, but this will do for now. 2238 */ 2239 for (aid = 1; aid < vap->iv_max_aid; aid++) { 2240 if (!IEEE80211_AID_ISSET(vap, aid)) 2241 break; 2242 } 2243 if (aid >= vap->iv_max_aid) { 2244 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_TOOMANY); 2245 ieee80211_node_leave(ni); 2246 return; 2247 } 2248 ni->ni_associd = aid | 0xc000; 2249 ni->ni_jointime = time_uptime; 2250 IEEE80211_LOCK(ic); 2251 IEEE80211_AID_SET(vap, ni->ni_associd); 2252 vap->iv_sta_assoc++; 2253 ic->ic_sta_assoc++; 2254 2255 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2256 ieee80211_ht_node_join(ni); 2257 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2258 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2259 ieee80211_node_join_11g(ni); 2260 IEEE80211_UNLOCK(ic); 2261 2262 newassoc = 1; 2263 } else 2264 newassoc = 0; 2265 2266 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2267 "station associated at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s", 2268 IEEE80211_NODE_AID(ni), 2269 ic->ic_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long", 2270 ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long", 2271 ic->ic_flags & IEEE80211_F_USEPROT ? ", protection" : "", 2272 ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "", 2273 ni->ni_flags & IEEE80211_NODE_HT ? 2274 (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "", 2275 ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "", 2276 ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" : 2277 ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "", 2278 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ? 2279 ", fast-frames" : "", 2280 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ? 2281 ", turbo" : "" 2282 ); 2283 2284 node_setuptxparms(ni); 2285 /* give driver a chance to setup state like ni_txrate */ 2286 if (ic->ic_newassoc != NULL) 2287 ic->ic_newassoc(ni, newassoc); 2288 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_SUCCESS); 2289 /* tell the authenticator about new station */ 2290 if (vap->iv_auth->ia_node_join != NULL) 2291 vap->iv_auth->ia_node_join(ni); 2292 ieee80211_notify_node_join(ni, 2293 resp == IEEE80211_FC0_SUBTYPE_ASSOC_RESP); 2294} 2295 2296static void 2297disable_protection(struct ieee80211com *ic) 2298{ 2299 KASSERT(ic->ic_nonerpsta == 0 && 2300 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0, 2301 ("%d non ERP stations, flags 0x%x", ic->ic_nonerpsta, 2302 ic->ic_flags_ext)); 2303 2304 ic->ic_flags &= ~IEEE80211_F_USEPROT; 2305 /* XXX verify mode? */ 2306 if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) { 2307 ic->ic_flags |= IEEE80211_F_SHPREAMBLE; 2308 ic->ic_flags &= ~IEEE80211_F_USEBARKER; 2309 } 2310 ieee80211_notify_erp_locked(ic); 2311} 2312 2313/* 2314 * Handle a station leaving an 11g network. 2315 */ 2316static void 2317ieee80211_node_leave_11g(struct ieee80211_node *ni) 2318{ 2319 struct ieee80211com *ic = ni->ni_ic; 2320 2321 IEEE80211_LOCK_ASSERT(ic); 2322 2323 KASSERT(IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan), 2324 ("not in 11g, bss %u:0x%x", ic->ic_bsschan->ic_freq, 2325 ic->ic_bsschan->ic_flags)); 2326 2327 /* 2328 * If a long slot station do the slot time bookkeeping. 2329 */ 2330 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2331 KASSERT(ic->ic_longslotsta > 0, 2332 ("bogus long slot station count %d", ic->ic_longslotsta)); 2333 ic->ic_longslotsta--; 2334 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2335 "long slot time station leaves, count now %d", 2336 ic->ic_longslotsta); 2337 if (ic->ic_longslotsta == 0) { 2338 /* 2339 * Re-enable use of short slot time if supported 2340 * and not operating in IBSS mode (per spec). 2341 */ 2342 if ((ic->ic_caps & IEEE80211_C_SHSLOT) && 2343 ic->ic_opmode != IEEE80211_M_IBSS) { 2344 IEEE80211_DPRINTF(ni->ni_vap, 2345 IEEE80211_MSG_ASSOC, 2346 "%s: re-enable use of short slot time\n", 2347 __func__); 2348 ieee80211_set_shortslottime(ic, 1); 2349 } 2350 } 2351 } 2352 /* 2353 * If a non-ERP station do the protection-related bookkeeping. 2354 */ 2355 if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) { 2356 KASSERT(ic->ic_nonerpsta > 0, 2357 ("bogus non-ERP station count %d", ic->ic_nonerpsta)); 2358 ic->ic_nonerpsta--; 2359 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2360 "non-ERP station leaves, count now %d%s", ic->ic_nonerpsta, 2361 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) ? 2362 " (non-ERP sta present)" : ""); 2363 if (ic->ic_nonerpsta == 0 && 2364 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2365 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2366 "%s: disable use of protection\n", __func__); 2367 disable_protection(ic); 2368 } 2369 } 2370} 2371 2372/* 2373 * Time out presence of an overlapping bss with non-ERP 2374 * stations. When operating in hostap mode we listen for 2375 * beacons from other stations and if we identify a non-ERP 2376 * station is present we enable protection. To identify 2377 * when all non-ERP stations are gone we time out this 2378 * condition. 2379 */ 2380static void 2381ieee80211_erp_timeout(struct ieee80211com *ic) 2382{ 2383 2384 IEEE80211_LOCK_ASSERT(ic); 2385 2386 if ((ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) && 2387 time_after(ticks, ic->ic_lastnonerp + IEEE80211_NONERP_PRESENT_AGE)) { 2388#if 0 2389 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni, 2390 "%s", "age out non-ERP sta present on channel"); 2391#endif 2392 ic->ic_flags_ext &= ~IEEE80211_FEXT_NONERP_PR; 2393 if (ic->ic_nonerpsta == 0) 2394 disable_protection(ic); 2395 } 2396} 2397 2398/* 2399 * Handle bookkeeping for station deauthentication/disassociation 2400 * when operating as an ap. 2401 */ 2402void 2403ieee80211_node_leave(struct ieee80211_node *ni) 2404{ 2405 struct ieee80211com *ic = ni->ni_ic; 2406 struct ieee80211vap *vap = ni->ni_vap; 2407 struct ieee80211_node_table *nt = ni->ni_table; 2408 2409 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2410 "station with aid %d leaves", IEEE80211_NODE_AID(ni)); 2411 2412 KASSERT(vap->iv_opmode != IEEE80211_M_STA, 2413 ("unexpected operating mode %u", vap->iv_opmode)); 2414 /* 2415 * If node wasn't previously associated all 2416 * we need to do is reclaim the reference. 2417 */ 2418 /* XXX ibss mode bypasses 11g and notification */ 2419 if (ni->ni_associd == 0) 2420 goto done; 2421 /* 2422 * Tell the authenticator the station is leaving. 2423 * Note that we must do this before yanking the 2424 * association id as the authenticator uses the 2425 * associd to locate it's state block. 2426 */ 2427 if (vap->iv_auth->ia_node_leave != NULL) 2428 vap->iv_auth->ia_node_leave(ni); 2429 2430 IEEE80211_LOCK(ic); 2431 IEEE80211_AID_CLR(vap, ni->ni_associd); 2432 ni->ni_associd = 0; 2433 vap->iv_sta_assoc--; 2434 ic->ic_sta_assoc--; 2435 2436 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2437 ieee80211_ht_node_leave(ni); 2438 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2439 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2440 ieee80211_node_leave_11g(ni); 2441 IEEE80211_UNLOCK(ic); 2442 /* 2443 * Cleanup station state. In particular clear various 2444 * state that might otherwise be reused if the node 2445 * is reused before the reference count goes to zero 2446 * (and memory is reclaimed). 2447 */ 2448 ieee80211_sta_leave(ni); 2449done: 2450 /* 2451 * Remove the node from any table it's recorded in and 2452 * drop the caller's reference. Removal from the table 2453 * is important to insure the node is not reprocessed 2454 * for inactivity. 2455 */ 2456 if (nt != NULL) { 2457 IEEE80211_NODE_LOCK(nt); 2458 node_reclaim(nt, ni); 2459 IEEE80211_NODE_UNLOCK(nt); 2460 } else 2461 ieee80211_free_node(ni); 2462} 2463 2464struct rssiinfo { 2465 struct ieee80211vap *vap; 2466 int rssi_samples; 2467 uint32_t rssi_total; 2468}; 2469 2470static void 2471get_hostap_rssi(void *arg, struct ieee80211_node *ni) 2472{ 2473 struct rssiinfo *info = arg; 2474 struct ieee80211vap *vap = ni->ni_vap; 2475 int8_t rssi; 2476 2477 if (info->vap != vap) 2478 return; 2479 /* only associated stations */ 2480 if (ni->ni_associd == 0) 2481 return; 2482 rssi = vap->iv_ic->ic_node_getrssi(ni); 2483 if (rssi != 0) { 2484 info->rssi_samples++; 2485 info->rssi_total += rssi; 2486 } 2487} 2488 2489static void 2490get_adhoc_rssi(void *arg, struct ieee80211_node *ni) 2491{ 2492 struct rssiinfo *info = arg; 2493 struct ieee80211vap *vap = ni->ni_vap; 2494 int8_t rssi; 2495 2496 if (info->vap != vap) 2497 return; 2498 /* only neighbors */ 2499 /* XXX check bssid */ 2500 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 2501 return; 2502 rssi = vap->iv_ic->ic_node_getrssi(ni); 2503 if (rssi != 0) { 2504 info->rssi_samples++; 2505 info->rssi_total += rssi; 2506 } 2507} 2508 2509int8_t 2510ieee80211_getrssi(struct ieee80211vap *vap) 2511{ 2512#define NZ(x) ((x) == 0 ? 1 : (x)) 2513 struct ieee80211com *ic = vap->iv_ic; 2514 struct rssiinfo info; 2515 2516 info.rssi_total = 0; 2517 info.rssi_samples = 0; 2518 info.vap = vap; 2519 switch (vap->iv_opmode) { 2520 case IEEE80211_M_IBSS: /* average of all ibss neighbors */ 2521 case IEEE80211_M_AHDEMO: /* average of all neighbors */ 2522 ieee80211_iterate_nodes(&ic->ic_sta, get_adhoc_rssi, &info); 2523 break; 2524 case IEEE80211_M_HOSTAP: /* average of all associated stations */ 2525 ieee80211_iterate_nodes(&ic->ic_sta, get_hostap_rssi, &info); 2526 break; 2527 case IEEE80211_M_MONITOR: /* XXX */ 2528 case IEEE80211_M_STA: /* use stats from associated ap */ 2529 default: 2530 if (vap->iv_bss != NULL) 2531 info.rssi_total = ic->ic_node_getrssi(vap->iv_bss); 2532 info.rssi_samples = 1; 2533 break; 2534 } 2535 return info.rssi_total / NZ(info.rssi_samples); 2536#undef NZ 2537} 2538 2539void 2540ieee80211_getsignal(struct ieee80211vap *vap, int8_t *rssi, int8_t *noise) 2541{ 2542 2543 if (vap->iv_bss == NULL) /* NB: shouldn't happen */ 2544 return; 2545 vap->iv_ic->ic_node_getsignal(vap->iv_bss, rssi, noise); 2546 /* for non-station mode return avg'd rssi accounting */ 2547 if (vap->iv_opmode != IEEE80211_M_STA) 2548 *rssi = ieee80211_getrssi(vap); 2549} 2550