ieee80211_node.c revision 184303
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 184303 2008-10-26 21:59:07Z sam $"); 29 30#include "opt_wlan.h" 31 32#include <sys/param.h> 33#include <sys/systm.h> 34#include <sys/mbuf.h> 35#include <sys/malloc.h> 36#include <sys/kernel.h> 37 38#include <sys/socket.h> 39 40#include <net/if.h> 41#include <net/if_media.h> 42#include <net/ethernet.h> 43 44#include <net80211/ieee80211_var.h> 45#include <net80211/ieee80211_input.h> 46#include <net80211/ieee80211_wds.h> 47 48#include <net/bpf.h> 49 50/* 51 * Association id's are managed with a bit vector. 52 */ 53#define IEEE80211_AID_SET(_vap, b) \ 54 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] |= \ 55 (1 << (IEEE80211_AID(b) % 32))) 56#define IEEE80211_AID_CLR(_vap, b) \ 57 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] &= \ 58 ~(1 << (IEEE80211_AID(b) % 32))) 59#define IEEE80211_AID_ISSET(_vap, b) \ 60 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] & (1 << (IEEE80211_AID(b) % 32))) 61 62#ifdef IEEE80211_DEBUG_REFCNT 63#define REFCNT_LOC "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line 64#else 65#define REFCNT_LOC "%s %p<%s> refcnt %d\n", __func__ 66#endif 67 68static int ieee80211_sta_join1(struct ieee80211_node *); 69 70static struct ieee80211_node *node_alloc(struct ieee80211vap *, 71 const uint8_t [IEEE80211_ADDR_LEN]); 72static void node_cleanup(struct ieee80211_node *); 73static void node_free(struct ieee80211_node *); 74static void node_age(struct ieee80211_node *); 75static int8_t node_getrssi(const struct ieee80211_node *); 76static void node_getsignal(const struct ieee80211_node *, int8_t *, int8_t *); 77static void node_getmimoinfo(const struct ieee80211_node *, 78 struct ieee80211_mimo_info *); 79 80static void _ieee80211_free_node(struct ieee80211_node *); 81 82static void ieee80211_node_table_init(struct ieee80211com *ic, 83 struct ieee80211_node_table *nt, const char *name, 84 int inact, int keymaxix); 85static void ieee80211_node_table_reset(struct ieee80211_node_table *, 86 struct ieee80211vap *); 87static void ieee80211_node_reclaim(struct ieee80211_node *); 88static void ieee80211_node_table_cleanup(struct ieee80211_node_table *nt); 89static void ieee80211_erp_timeout(struct ieee80211com *); 90 91MALLOC_DEFINE(M_80211_NODE, "80211node", "802.11 node state"); 92MALLOC_DEFINE(M_80211_NODE_IE, "80211nodeie", "802.11 node ie"); 93 94void 95ieee80211_node_attach(struct ieee80211com *ic) 96{ 97 ieee80211_node_table_init(ic, &ic->ic_sta, "station", 98 IEEE80211_INACT_INIT, ic->ic_max_keyix); 99 callout_init(&ic->ic_inact, CALLOUT_MPSAFE); 100 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, 101 ieee80211_node_timeout, ic); 102 103 ic->ic_node_alloc = node_alloc; 104 ic->ic_node_free = node_free; 105 ic->ic_node_cleanup = node_cleanup; 106 ic->ic_node_age = node_age; 107 ic->ic_node_drain = node_age; /* NB: same as age */ 108 ic->ic_node_getrssi = node_getrssi; 109 ic->ic_node_getsignal = node_getsignal; 110 ic->ic_node_getmimoinfo = node_getmimoinfo; 111 112 /* 113 * Set flags to be propagated to all vap's; 114 * these define default behaviour/configuration. 115 */ 116 ic->ic_flags_ext |= IEEE80211_FEXT_INACT; /* inactivity processing */ 117} 118 119void 120ieee80211_node_detach(struct ieee80211com *ic) 121{ 122 123 callout_drain(&ic->ic_inact); 124 ieee80211_node_table_cleanup(&ic->ic_sta); 125} 126 127void 128ieee80211_node_vattach(struct ieee80211vap *vap) 129{ 130 /* NB: driver can override */ 131 vap->iv_max_aid = IEEE80211_AID_DEF; 132 133 /* default station inactivity timer setings */ 134 vap->iv_inact_init = IEEE80211_INACT_INIT; 135 vap->iv_inact_auth = IEEE80211_INACT_AUTH; 136 vap->iv_inact_run = IEEE80211_INACT_RUN; 137 vap->iv_inact_probe = IEEE80211_INACT_PROBE; 138 139 IEEE80211_DPRINTF(vap, IEEE80211_MSG_INACT, 140 "%s: init %u auth %u run %u probe %u\n", __func__, 141 vap->iv_inact_init, vap->iv_inact_auth, 142 vap->iv_inact_run, vap->iv_inact_probe); 143} 144 145void 146ieee80211_node_latevattach(struct ieee80211vap *vap) 147{ 148 if (vap->iv_opmode == IEEE80211_M_HOSTAP) { 149 /* XXX should we allow max aid to be zero? */ 150 if (vap->iv_max_aid < IEEE80211_AID_MIN) { 151 vap->iv_max_aid = IEEE80211_AID_MIN; 152 if_printf(vap->iv_ifp, 153 "WARNING: max aid too small, changed to %d\n", 154 vap->iv_max_aid); 155 } 156 MALLOC(vap->iv_aid_bitmap, uint32_t *, 157 howmany(vap->iv_max_aid, 32) * sizeof(uint32_t), 158 M_80211_NODE, M_NOWAIT | M_ZERO); 159 if (vap->iv_aid_bitmap == NULL) { 160 /* XXX no way to recover */ 161 printf("%s: no memory for AID bitmap, max aid %d!\n", 162 __func__, vap->iv_max_aid); 163 vap->iv_max_aid = 0; 164 } 165 } 166 167 ieee80211_reset_bss(vap); 168 169 vap->iv_auth = ieee80211_authenticator_get(vap->iv_bss->ni_authmode); 170} 171 172void 173ieee80211_node_vdetach(struct ieee80211vap *vap) 174{ 175 struct ieee80211com *ic = vap->iv_ic; 176 177 ieee80211_node_table_reset(&ic->ic_sta, vap); 178 if (vap->iv_bss != NULL) { 179 ieee80211_free_node(vap->iv_bss); 180 vap->iv_bss = NULL; 181 } 182 if (vap->iv_aid_bitmap != NULL) { 183 FREE(vap->iv_aid_bitmap, M_80211_NODE); 184 vap->iv_aid_bitmap = NULL; 185 } 186} 187 188/* 189 * Port authorize/unauthorize interfaces for use by an authenticator. 190 */ 191 192void 193ieee80211_node_authorize(struct ieee80211_node *ni) 194{ 195 struct ieee80211vap *vap = ni->ni_vap; 196 197 ni->ni_flags |= IEEE80211_NODE_AUTH; 198 ni->ni_inact_reload = vap->iv_inact_run; 199 ni->ni_inact = ni->ni_inact_reload; 200 201 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 202 "%s: inact_reload %u", __func__, ni->ni_inact_reload); 203} 204 205void 206ieee80211_node_unauthorize(struct ieee80211_node *ni) 207{ 208 struct ieee80211vap *vap = ni->ni_vap; 209 210 ni->ni_flags &= ~IEEE80211_NODE_AUTH; 211 ni->ni_inact_reload = vap->iv_inact_auth; 212 if (ni->ni_inact > ni->ni_inact_reload) 213 ni->ni_inact = ni->ni_inact_reload; 214 215 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 216 "%s: inact_reload %u inact %u", __func__, 217 ni->ni_inact_reload, ni->ni_inact); 218} 219 220/* 221 * Fix tx parameters for a node according to ``association state''. 222 */ 223static void 224node_setuptxparms(struct ieee80211_node *ni) 225{ 226 struct ieee80211vap *vap = ni->ni_vap; 227 228 if (ni->ni_flags & IEEE80211_NODE_HT) { 229 if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan)) 230 ni->ni_txparms = &vap->iv_txparms[IEEE80211_MODE_11NA]; 231 else 232 ni->ni_txparms = &vap->iv_txparms[IEEE80211_MODE_11NG]; 233 } else { /* legacy rate handling */ 234 if (IEEE80211_IS_CHAN_A(ni->ni_chan)) 235 ni->ni_txparms = &vap->iv_txparms[IEEE80211_MODE_11A]; 236 else if (ni->ni_flags & IEEE80211_NODE_ERP) 237 ni->ni_txparms = &vap->iv_txparms[IEEE80211_MODE_11G]; 238 else 239 ni->ni_txparms = &vap->iv_txparms[IEEE80211_MODE_11B]; 240 } 241} 242 243/* 244 * Set/change the channel. The rate set is also updated as 245 * to insure a consistent view by drivers. 246 * XXX should be private but hostap needs it to deal with CSA 247 */ 248void 249ieee80211_node_set_chan(struct ieee80211_node *ni, 250 struct ieee80211_channel *chan) 251{ 252 struct ieee80211com *ic = ni->ni_ic; 253 struct ieee80211vap *vap = ni->ni_vap; 254 enum ieee80211_phymode mode; 255 256 KASSERT(chan != IEEE80211_CHAN_ANYC, ("no channel")); 257 258 ni->ni_chan = chan; 259 mode = ieee80211_chan2mode(chan); 260 if (IEEE80211_IS_CHAN_HT(chan)) { 261 /* 262 * XXX Gotta be careful here; the rate set returned by 263 * ieee80211_get_suprates is actually any HT rate 264 * set so blindly copying it will be bad. We must 265 * install the legacy rate est in ni_rates and the 266 * HT rate set in ni_htrates. 267 */ 268 ni->ni_htrates = *ieee80211_get_suphtrates(ic, chan); 269 /* 270 * Setup bss tx parameters based on operating mode. We 271 * use legacy rates when operating in a mixed HT+non-HT bss 272 * and non-ERP rates in 11g for mixed ERP+non-ERP bss. 273 */ 274 if (mode == IEEE80211_MODE_11NA && 275 (vap->iv_flags_ext & IEEE80211_FEXT_PUREN) == 0) 276 mode = IEEE80211_MODE_11A; 277 else if (mode == IEEE80211_MODE_11NG && 278 (vap->iv_flags_ext & IEEE80211_FEXT_PUREN) == 0) 279 mode = IEEE80211_MODE_11G; 280 if (mode == IEEE80211_MODE_11G && 281 (vap->iv_flags & IEEE80211_F_PUREG) == 0) 282 mode = IEEE80211_MODE_11B; 283 } 284 ni->ni_txparms = &vap->iv_txparms[mode]; 285 ni->ni_rates = *ieee80211_get_suprates(ic, chan); 286} 287 288static __inline void 289copy_bss(struct ieee80211_node *nbss, const struct ieee80211_node *obss) 290{ 291 /* propagate useful state */ 292 nbss->ni_authmode = obss->ni_authmode; 293 nbss->ni_txpower = obss->ni_txpower; 294 nbss->ni_vlan = obss->ni_vlan; 295 /* XXX statistics? */ 296 /* XXX legacy WDS bssid? */ 297} 298 299void 300ieee80211_create_ibss(struct ieee80211vap* vap, struct ieee80211_channel *chan) 301{ 302 struct ieee80211com *ic = vap->iv_ic; 303 struct ieee80211_node *ni; 304 305 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, 306 "%s: creating ibss on channel %u\n", __func__, 307 ieee80211_chan2ieee(ic, chan)); 308 309 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr); 310 if (ni == NULL) { 311 /* XXX recovery? */ 312 return; 313 } 314 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr); 315 ni->ni_esslen = vap->iv_des_ssid[0].len; 316 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen); 317 if (vap->iv_bss != NULL) 318 copy_bss(ni, vap->iv_bss); 319 ni->ni_intval = ic->ic_bintval; 320 if (vap->iv_flags & IEEE80211_F_PRIVACY) 321 ni->ni_capinfo |= IEEE80211_CAPINFO_PRIVACY; 322 if (ic->ic_phytype == IEEE80211_T_FH) { 323 ni->ni_fhdwell = 200; /* XXX */ 324 ni->ni_fhindex = 1; 325 } 326 if (vap->iv_opmode == IEEE80211_M_IBSS) { 327 vap->iv_flags |= IEEE80211_F_SIBSS; 328 ni->ni_capinfo |= IEEE80211_CAPINFO_IBSS; /* XXX */ 329 if (vap->iv_flags & IEEE80211_F_DESBSSID) 330 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid); 331 else { 332 get_random_bytes(ni->ni_bssid, IEEE80211_ADDR_LEN); 333 /* clear group bit, add local bit */ 334 ni->ni_bssid[0] = (ni->ni_bssid[0] &~ 0x01) | 0x02; 335 } 336 } else if (vap->iv_opmode == IEEE80211_M_AHDEMO) { 337 if (vap->iv_flags & IEEE80211_F_DESBSSID) 338 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid); 339 else 340 memset(ni->ni_bssid, 0, IEEE80211_ADDR_LEN); 341 } 342 /* 343 * Fix the channel and related attributes. 344 */ 345 /* clear DFS CAC state on previous channel */ 346 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC && 347 ic->ic_bsschan->ic_freq != chan->ic_freq && 348 IEEE80211_IS_CHAN_CACDONE(ic->ic_bsschan)) 349 ieee80211_dfs_cac_clear(ic, ic->ic_bsschan); 350 ic->ic_bsschan = chan; 351 ieee80211_node_set_chan(ni, chan); 352 ic->ic_curmode = ieee80211_chan2mode(chan); 353 /* 354 * Do mode-specific setup. 355 */ 356 if (IEEE80211_IS_CHAN_FULL(chan)) { 357 if (IEEE80211_IS_CHAN_ANYG(chan)) { 358 /* 359 * Use a mixed 11b/11g basic rate set. 360 */ 361 ieee80211_setbasicrates(&ni->ni_rates, 362 IEEE80211_MODE_11G); 363 if (vap->iv_flags & IEEE80211_F_PUREG) { 364 /* 365 * Also mark OFDM rates basic so 11b 366 * stations do not join (WiFi compliance). 367 */ 368 ieee80211_addbasicrates(&ni->ni_rates, 369 IEEE80211_MODE_11A); 370 } 371 } else if (IEEE80211_IS_CHAN_B(chan)) { 372 /* 373 * Force pure 11b rate set. 374 */ 375 ieee80211_setbasicrates(&ni->ni_rates, 376 IEEE80211_MODE_11B); 377 } 378 } 379 380 (void) ieee80211_sta_join1(ieee80211_ref_node(ni)); 381} 382 383/* 384 * Reset bss state on transition to the INIT state. 385 * Clear any stations from the table (they have been 386 * deauth'd) and reset the bss node (clears key, rate 387 * etc. state). 388 */ 389void 390ieee80211_reset_bss(struct ieee80211vap *vap) 391{ 392 struct ieee80211com *ic = vap->iv_ic; 393 struct ieee80211_node *ni, *obss; 394 395 ieee80211_node_table_reset(&ic->ic_sta, vap); 396 /* XXX multi-bss: wrong */ 397 ieee80211_reset_erp(ic); 398 399 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr); 400 KASSERT(ni != NULL, ("unable to setup inital BSS node")); 401 obss = vap->iv_bss; 402 vap->iv_bss = ieee80211_ref_node(ni); 403 if (obss != NULL) { 404 copy_bss(ni, obss); 405 ni->ni_intval = ic->ic_bintval; 406 ieee80211_free_node(obss); 407 } else 408 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr); 409} 410 411static int 412match_ssid(const struct ieee80211_node *ni, 413 int nssid, const struct ieee80211_scan_ssid ssids[]) 414{ 415 int i; 416 417 for (i = 0; i < nssid; i++) { 418 if (ni->ni_esslen == ssids[i].len && 419 memcmp(ni->ni_essid, ssids[i].ssid, ni->ni_esslen) == 0) 420 return 1; 421 } 422 return 0; 423} 424 425/* 426 * Test a node for suitability/compatibility. 427 */ 428static int 429check_bss(struct ieee80211vap *vap, struct ieee80211_node *ni) 430{ 431 struct ieee80211com *ic = ni->ni_ic; 432 uint8_t rate; 433 434 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 435 return 0; 436 if (vap->iv_opmode == IEEE80211_M_IBSS) { 437 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 438 return 0; 439 } else { 440 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 441 return 0; 442 } 443 if (vap->iv_flags & IEEE80211_F_PRIVACY) { 444 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 445 return 0; 446 } else { 447 /* XXX does this mean privacy is supported or required? */ 448 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 449 return 0; 450 } 451 rate = ieee80211_fix_rate(ni, &ni->ni_rates, 452 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 453 if (rate & IEEE80211_RATE_BASIC) 454 return 0; 455 if (vap->iv_des_nssid != 0 && 456 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid)) 457 return 0; 458 if ((vap->iv_flags & IEEE80211_F_DESBSSID) && 459 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid)) 460 return 0; 461 return 1; 462} 463 464#ifdef IEEE80211_DEBUG 465/* 466 * Display node suitability/compatibility. 467 */ 468static void 469check_bss_debug(struct ieee80211vap *vap, struct ieee80211_node *ni) 470{ 471 struct ieee80211com *ic = ni->ni_ic; 472 uint8_t rate; 473 int fail; 474 475 fail = 0; 476 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 477 fail |= 0x01; 478 if (vap->iv_opmode == IEEE80211_M_IBSS) { 479 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 480 fail |= 0x02; 481 } else { 482 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 483 fail |= 0x02; 484 } 485 if (vap->iv_flags & IEEE80211_F_PRIVACY) { 486 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 487 fail |= 0x04; 488 } else { 489 /* XXX does this mean privacy is supported or required? */ 490 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 491 fail |= 0x04; 492 } 493 rate = ieee80211_fix_rate(ni, &ni->ni_rates, 494 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 495 if (rate & IEEE80211_RATE_BASIC) 496 fail |= 0x08; 497 if (vap->iv_des_nssid != 0 && 498 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid)) 499 fail |= 0x10; 500 if ((vap->iv_flags & IEEE80211_F_DESBSSID) && 501 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid)) 502 fail |= 0x20; 503 504 printf(" %c %s", fail ? '-' : '+', ether_sprintf(ni->ni_macaddr)); 505 printf(" %s%c", ether_sprintf(ni->ni_bssid), fail & 0x20 ? '!' : ' '); 506 printf(" %3d%c", 507 ieee80211_chan2ieee(ic, ni->ni_chan), fail & 0x01 ? '!' : ' '); 508 printf(" %2dM%c", (rate & IEEE80211_RATE_VAL) / 2, 509 fail & 0x08 ? '!' : ' '); 510 printf(" %4s%c", 511 (ni->ni_capinfo & IEEE80211_CAPINFO_ESS) ? "ess" : 512 (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) ? "ibss" : 513 "????", 514 fail & 0x02 ? '!' : ' '); 515 printf(" %3s%c ", 516 (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) ? "wep" : "no", 517 fail & 0x04 ? '!' : ' '); 518 ieee80211_print_essid(ni->ni_essid, ni->ni_esslen); 519 printf("%s\n", fail & 0x10 ? "!" : ""); 520} 521#endif /* IEEE80211_DEBUG */ 522 523/* 524 * Handle 802.11 ad hoc network merge. The 525 * convention, set by the Wireless Ethernet Compatibility Alliance 526 * (WECA), is that an 802.11 station will change its BSSID to match 527 * the "oldest" 802.11 ad hoc network, on the same channel, that 528 * has the station's desired SSID. The "oldest" 802.11 network 529 * sends beacons with the greatest TSF timestamp. 530 * 531 * The caller is assumed to validate TSF's before attempting a merge. 532 * 533 * Return !0 if the BSSID changed, 0 otherwise. 534 */ 535int 536ieee80211_ibss_merge(struct ieee80211_node *ni) 537{ 538 struct ieee80211vap *vap = ni->ni_vap; 539#ifdef IEEE80211_DEBUG 540 struct ieee80211com *ic = ni->ni_ic; 541#endif 542 543 if (ni == vap->iv_bss || 544 IEEE80211_ADDR_EQ(ni->ni_bssid, vap->iv_bss->ni_bssid)) { 545 /* unchanged, nothing to do */ 546 return 0; 547 } 548 if (!check_bss(vap, ni)) { 549 /* capabilities mismatch */ 550 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 551 "%s: merge failed, capabilities mismatch\n", __func__); 552#ifdef IEEE80211_DEBUG 553 if (ieee80211_msg_assoc(vap)) 554 check_bss_debug(vap, ni); 555#endif 556 vap->iv_stats.is_ibss_capmismatch++; 557 return 0; 558 } 559 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 560 "%s: new bssid %s: %s preamble, %s slot time%s\n", __func__, 561 ether_sprintf(ni->ni_bssid), 562 ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long", 563 ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long", 564 ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : "" 565 ); 566 return ieee80211_sta_join1(ieee80211_ref_node(ni)); 567} 568 569/* 570 * Calculate HT channel promotion flags for all vaps. 571 * This assumes ni_chan have been setup for each vap. 572 */ 573static int 574gethtadjustflags(struct ieee80211com *ic) 575{ 576 struct ieee80211vap *vap; 577 int flags; 578 579 flags = 0; 580 /* XXX locking */ 581 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 582 if (vap->iv_state < IEEE80211_S_RUN) 583 continue; 584 switch (vap->iv_opmode) { 585 case IEEE80211_M_WDS: 586 case IEEE80211_M_STA: 587 case IEEE80211_M_AHDEMO: 588 case IEEE80211_M_HOSTAP: 589 case IEEE80211_M_IBSS: 590 flags |= ieee80211_htchanflags(vap->iv_bss->ni_chan); 591 break; 592 default: 593 break; 594 } 595 } 596 return flags; 597} 598 599/* 600 * Check if the current channel needs to change based on whether 601 * any vap's are using HT20/HT40. This is used to sync the state 602 * of ic_curchan after a channel width change on a running vap. 603 */ 604void 605ieee80211_sync_curchan(struct ieee80211com *ic) 606{ 607 struct ieee80211_channel *c; 608 609 c = ieee80211_ht_adjust_channel(ic, ic->ic_curchan, gethtadjustflags(ic)); 610 if (c != ic->ic_curchan) { 611 ic->ic_curchan = c; 612 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan); 613 ic->ic_set_channel(ic); 614 } 615} 616 617/* 618 * Change the current channel. The request channel may be 619 * promoted if other vap's are operating with HT20/HT40. 620 */ 621void 622ieee80211_setcurchan(struct ieee80211com *ic, struct ieee80211_channel *c) 623{ 624 if (ic->ic_htcaps & IEEE80211_HTC_HT) { 625 int flags = gethtadjustflags(ic); 626 /* 627 * Check for channel promotion required to support the 628 * set of running vap's. This assumes we are called 629 * after ni_chan is setup for each vap. 630 */ 631 /* NB: this assumes IEEE80211_FEXT_USEHT40 > IEEE80211_FEXT_HT */ 632 if (flags > ieee80211_htchanflags(c)) 633 c = ieee80211_ht_adjust_channel(ic, c, flags); 634 } 635 ic->ic_bsschan = ic->ic_curchan = c; 636 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan); 637 ic->ic_set_channel(ic); 638} 639 640/* 641 * Join the specified IBSS/BSS network. The node is assumed to 642 * be passed in with a held reference. 643 */ 644static int 645ieee80211_sta_join1(struct ieee80211_node *selbs) 646{ 647 struct ieee80211vap *vap = selbs->ni_vap; 648 struct ieee80211com *ic = selbs->ni_ic; 649 struct ieee80211_node *obss; 650 int canreassoc; 651 652 /* 653 * Committed to selbs, setup state. 654 */ 655 obss = vap->iv_bss; 656 /* 657 * Check if old+new node have the same address in which 658 * case we can reassociate when operating in sta mode. 659 */ 660 canreassoc = (obss != NULL && 661 vap->iv_state == IEEE80211_S_RUN && 662 IEEE80211_ADDR_EQ(obss->ni_macaddr, selbs->ni_macaddr)); 663 vap->iv_bss = selbs; /* NB: caller assumed to bump refcnt */ 664 if (obss != NULL) { 665 copy_bss(selbs, obss); 666 ieee80211_node_reclaim(obss); 667 obss = NULL; /* NB: guard against later use */ 668 } 669 670 /* 671 * Delete unusable rates; we've already checked 672 * that the negotiated rate set is acceptable. 673 */ 674 ieee80211_fix_rate(vap->iv_bss, &vap->iv_bss->ni_rates, 675 IEEE80211_F_DODEL | IEEE80211_F_JOIN); 676 677 ieee80211_setcurchan(ic, selbs->ni_chan); 678 /* 679 * Set the erp state (mostly the slot time) to deal with 680 * the auto-select case; this should be redundant if the 681 * mode is locked. 682 */ 683 ieee80211_reset_erp(ic); 684 ieee80211_wme_initparams(vap); 685 686 if (vap->iv_opmode == IEEE80211_M_STA) { 687 if (canreassoc) { 688 /* Reassociate */ 689 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 1); 690 } else { 691 /* 692 * Act as if we received a DEAUTH frame in case we 693 * are invoked from the RUN state. This will cause 694 * us to try to re-authenticate if we are operating 695 * as a station. 696 */ 697 ieee80211_new_state(vap, IEEE80211_S_AUTH, 698 IEEE80211_FC0_SUBTYPE_DEAUTH); 699 } 700 } else 701 ieee80211_new_state(vap, IEEE80211_S_RUN, -1); 702 return 1; 703} 704 705int 706ieee80211_sta_join(struct ieee80211vap *vap, struct ieee80211_channel *chan, 707 const struct ieee80211_scan_entry *se) 708{ 709 struct ieee80211com *ic = vap->iv_ic; 710 struct ieee80211_node *ni; 711 712 ni = ieee80211_alloc_node(&ic->ic_sta, vap, se->se_macaddr); 713 if (ni == NULL) { 714 /* XXX msg */ 715 return 0; 716 } 717 /* 718 * Expand scan state into node's format. 719 * XXX may not need all this stuff 720 */ 721 IEEE80211_ADDR_COPY(ni->ni_bssid, se->se_bssid); 722 ni->ni_esslen = se->se_ssid[1]; 723 memcpy(ni->ni_essid, se->se_ssid+2, ni->ni_esslen); 724 ni->ni_rstamp = se->se_rstamp; 725 ni->ni_tstamp.tsf = se->se_tstamp.tsf; 726 ni->ni_intval = se->se_intval; 727 ni->ni_capinfo = se->se_capinfo; 728 ni->ni_chan = chan; 729 ni->ni_timoff = se->se_timoff; 730 ni->ni_fhdwell = se->se_fhdwell; 731 ni->ni_fhindex = se->se_fhindex; 732 ni->ni_erp = se->se_erp; 733 IEEE80211_RSSI_LPF(ni->ni_avgrssi, se->se_rssi); 734 ni->ni_noise = se->se_noise; 735 736 if (ieee80211_ies_init(&ni->ni_ies, se->se_ies.data, se->se_ies.len)) { 737 ieee80211_ies_expand(&ni->ni_ies); 738 if (ni->ni_ies.ath_ie != NULL) 739 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 740 if (ni->ni_ies.htcap_ie != NULL) 741 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie); 742 if (ni->ni_ies.htinfo_ie != NULL) 743 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie); 744 } 745 746 vap->iv_dtim_period = se->se_dtimperiod; 747 vap->iv_dtim_count = 0; 748 749 /* NB: must be after ni_chan is setup */ 750 ieee80211_setup_rates(ni, se->se_rates, se->se_xrates, 751 IEEE80211_F_DOSORT); 752 if (ieee80211_iserp_rateset(&ni->ni_rates)) 753 ni->ni_flags |= IEEE80211_NODE_ERP; 754 node_setuptxparms(ni); 755 756 return ieee80211_sta_join1(ieee80211_ref_node(ni)); 757} 758 759/* 760 * Leave the specified IBSS/BSS network. The node is assumed to 761 * be passed in with a held reference. 762 */ 763void 764ieee80211_sta_leave(struct ieee80211_node *ni) 765{ 766 struct ieee80211com *ic = ni->ni_ic; 767 768 ic->ic_node_cleanup(ni); 769 ieee80211_notify_node_leave(ni); 770} 771 772/* 773 * Send a deauthenticate frame and drop the station. 774 */ 775void 776ieee80211_node_deauth(struct ieee80211_node *ni, int reason) 777{ 778 /* NB: bump the refcnt to be sure temporay nodes are not reclaimed */ 779 ieee80211_ref_node(ni); 780 if (ni->ni_associd != 0) 781 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH, reason); 782 ieee80211_node_leave(ni); 783 ieee80211_free_node(ni); 784} 785 786static struct ieee80211_node * 787node_alloc(struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 788{ 789 struct ieee80211_node *ni; 790 791 MALLOC(ni, struct ieee80211_node *, sizeof(struct ieee80211_node), 792 M_80211_NODE, M_NOWAIT | M_ZERO); 793 return ni; 794} 795 796/* 797 * Initialize an ie blob with the specified data. If previous 798 * data exists re-use the data block. As a side effect we clear 799 * all references to specific ie's; the caller is required to 800 * recalculate them. 801 */ 802int 803ieee80211_ies_init(struct ieee80211_ies *ies, const uint8_t *data, int len) 804{ 805 /* NB: assumes data+len are the last fields */ 806 memset(ies, 0, offsetof(struct ieee80211_ies, data)); 807 if (ies->data != NULL && ies->len != len) { 808 /* data size changed */ 809 FREE(ies->data, M_80211_NODE_IE); 810 ies->data = NULL; 811 } 812 if (ies->data == NULL) { 813 MALLOC(ies->data, uint8_t *, len, M_80211_NODE_IE, M_NOWAIT); 814 if (ies->data == NULL) { 815 ies->len = 0; 816 /* NB: pointers have already been zero'd above */ 817 return 0; 818 } 819 } 820 memcpy(ies->data, data, len); 821 ies->len = len; 822 return 1; 823} 824 825/* 826 * Reclaim storage for an ie blob. 827 */ 828void 829ieee80211_ies_cleanup(struct ieee80211_ies *ies) 830{ 831 if (ies->data != NULL) 832 FREE(ies->data, M_80211_NODE_IE); 833} 834 835/* 836 * Expand an ie blob data contents and to fillin individual 837 * ie pointers. The data blob is assumed to be well-formed; 838 * we don't do any validity checking of ie lengths. 839 */ 840void 841ieee80211_ies_expand(struct ieee80211_ies *ies) 842{ 843 uint8_t *ie; 844 int ielen; 845 846 ie = ies->data; 847 ielen = ies->len; 848 while (ielen > 0) { 849 switch (ie[0]) { 850 case IEEE80211_ELEMID_VENDOR: 851 if (iswpaoui(ie)) 852 ies->wpa_ie = ie; 853 else if (iswmeoui(ie)) 854 ies->wme_ie = ie; 855 else if (isatherosoui(ie)) 856 ies->ath_ie = ie; 857 break; 858 case IEEE80211_ELEMID_RSN: 859 ies->rsn_ie = ie; 860 break; 861 case IEEE80211_ELEMID_HTCAP: 862 ies->htcap_ie = ie; 863 break; 864 } 865 ielen -= 2 + ie[1]; 866 ie += 2 + ie[1]; 867 } 868} 869 870/* 871 * Reclaim any resources in a node and reset any critical 872 * state. Typically nodes are free'd immediately after, 873 * but in some cases the storage may be reused so we need 874 * to insure consistent state (should probably fix that). 875 */ 876static void 877node_cleanup(struct ieee80211_node *ni) 878{ 879#define N(a) (sizeof(a)/sizeof(a[0])) 880 struct ieee80211vap *vap = ni->ni_vap; 881 int i; 882 883 /* NB: preserve ni_table */ 884 if (ni->ni_flags & IEEE80211_NODE_PWR_MGT) { 885 if (vap->iv_opmode != IEEE80211_M_STA) 886 vap->iv_ps_sta--; 887 ni->ni_flags &= ~IEEE80211_NODE_PWR_MGT; 888 IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni, 889 "power save mode off, %u sta's in ps mode", vap->iv_ps_sta); 890 } 891 /* 892 * Cleanup any HT-related state. 893 */ 894 if (ni->ni_flags & IEEE80211_NODE_HT) 895 ieee80211_ht_node_cleanup(ni); 896 /* 897 * Clear AREF flag that marks the authorization refcnt bump 898 * has happened. This is probably not needed as the node 899 * should always be removed from the table so not found but 900 * do it just in case. 901 */ 902 ni->ni_flags &= ~IEEE80211_NODE_AREF; 903 904 /* 905 * Drain power save queue and, if needed, clear TIM. 906 */ 907 if (ieee80211_node_psq_drain(ni) != 0 && vap->iv_set_tim != NULL) 908 vap->iv_set_tim(ni, 0); 909 910 ni->ni_associd = 0; 911 if (ni->ni_challenge != NULL) { 912 FREE(ni->ni_challenge, M_80211_NODE); 913 ni->ni_challenge = NULL; 914 } 915 /* 916 * Preserve SSID, WPA, and WME ie's so the bss node is 917 * reusable during a re-auth/re-assoc state transition. 918 * If we remove these data they will not be recreated 919 * because they come from a probe-response or beacon frame 920 * which cannot be expected prior to the association-response. 921 * This should not be an issue when operating in other modes 922 * as stations leaving always go through a full state transition 923 * which will rebuild this state. 924 * 925 * XXX does this leave us open to inheriting old state? 926 */ 927 for (i = 0; i < N(ni->ni_rxfrag); i++) 928 if (ni->ni_rxfrag[i] != NULL) { 929 m_freem(ni->ni_rxfrag[i]); 930 ni->ni_rxfrag[i] = NULL; 931 } 932 /* 933 * Must be careful here to remove any key map entry w/o a LOR. 934 */ 935 ieee80211_node_delucastkey(ni); 936#undef N 937} 938 939static void 940node_free(struct ieee80211_node *ni) 941{ 942 struct ieee80211com *ic = ni->ni_ic; 943 944 ic->ic_node_cleanup(ni); 945 ieee80211_ies_cleanup(&ni->ni_ies); 946 ieee80211_psq_cleanup(&ni->ni_psq); 947 IEEE80211_NODE_WDSQ_DESTROY(ni); 948 FREE(ni, M_80211_NODE); 949} 950 951static void 952node_age(struct ieee80211_node *ni) 953{ 954 struct ieee80211vap *vap = ni->ni_vap; 955 956 IEEE80211_NODE_LOCK_ASSERT(&vap->iv_ic->ic_sta); 957 958 /* 959 * Age frames on the power save queue. 960 */ 961 if (ieee80211_node_psq_age(ni) != 0 && 962 ni->ni_psq.psq_len == 0 && vap->iv_set_tim != NULL) 963 vap->iv_set_tim(ni, 0); 964 /* 965 * Age frames on the wds pending queue. 966 */ 967 if (IEEE80211_NODE_WDSQ_QLEN(ni) != 0) 968 ieee80211_node_wdsq_age(ni); 969 /* 970 * Age out HT resources (e.g. frames on the 971 * A-MPDU reorder queues). 972 */ 973 if (ni->ni_associd != 0 && (ni->ni_flags & IEEE80211_NODE_HT)) 974 ieee80211_ht_node_age(ni); 975} 976 977static int8_t 978node_getrssi(const struct ieee80211_node *ni) 979{ 980 uint32_t avgrssi = ni->ni_avgrssi; 981 int32_t rssi; 982 983 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) 984 return 0; 985 rssi = IEEE80211_RSSI_GET(avgrssi); 986 return rssi < 0 ? 0 : rssi > 127 ? 127 : rssi; 987} 988 989static void 990node_getsignal(const struct ieee80211_node *ni, int8_t *rssi, int8_t *noise) 991{ 992 *rssi = node_getrssi(ni); 993 *noise = ni->ni_noise; 994} 995 996static void 997node_getmimoinfo(const struct ieee80211_node *ni, 998 struct ieee80211_mimo_info *info) 999{ 1000 /* XXX zero data? */ 1001} 1002 1003struct ieee80211_node * 1004ieee80211_alloc_node(struct ieee80211_node_table *nt, 1005 struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1006{ 1007 struct ieee80211com *ic = nt->nt_ic; 1008 struct ieee80211_node *ni; 1009 int hash; 1010 1011 ni = ic->ic_node_alloc(vap, macaddr); 1012 if (ni == NULL) { 1013 vap->iv_stats.is_rx_nodealloc++; 1014 return NULL; 1015 } 1016 1017 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1018 "%s %p<%s> in %s table\n", __func__, ni, 1019 ether_sprintf(macaddr), nt->nt_name); 1020 1021 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1022 hash = IEEE80211_NODE_HASH(macaddr); 1023 ieee80211_node_initref(ni); /* mark referenced */ 1024 ni->ni_chan = IEEE80211_CHAN_ANYC; 1025 ni->ni_authmode = IEEE80211_AUTH_OPEN; 1026 ni->ni_txpower = ic->ic_txpowlimit; /* max power */ 1027 ni->ni_txparms = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)]; 1028 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE); 1029 ni->ni_avgrssi = IEEE80211_RSSI_DUMMY_MARKER; 1030 ni->ni_inact_reload = nt->nt_inact_init; 1031 ni->ni_inact = ni->ni_inact_reload; 1032 ni->ni_ath_defkeyix = 0x7fff; 1033 ieee80211_psq_init(&ni->ni_psq, "unknown"); 1034 IEEE80211_NODE_WDSQ_INIT(ni, "unknown"); 1035 1036 IEEE80211_NODE_LOCK(nt); 1037 TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list); 1038 LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash); 1039 ni->ni_table = nt; 1040 ni->ni_vap = vap; 1041 ni->ni_ic = ic; 1042 IEEE80211_NODE_UNLOCK(nt); 1043 1044 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 1045 "%s: inact_reload %u", __func__, ni->ni_inact_reload); 1046 1047 return ni; 1048} 1049 1050/* 1051 * Craft a temporary node suitable for sending a management frame 1052 * to the specified station. We craft only as much state as we 1053 * need to do the work since the node will be immediately reclaimed 1054 * once the send completes. 1055 */ 1056struct ieee80211_node * 1057ieee80211_tmp_node(struct ieee80211vap *vap, 1058 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1059{ 1060 struct ieee80211com *ic = vap->iv_ic; 1061 struct ieee80211_node *ni; 1062 1063 ni = ic->ic_node_alloc(vap, macaddr); 1064 if (ni != NULL) { 1065 struct ieee80211_node *bss = vap->iv_bss; 1066 1067 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1068 "%s %p<%s>\n", __func__, ni, ether_sprintf(macaddr)); 1069 1070 ni->ni_table = NULL; /* NB: pedantic */ 1071 ni->ni_ic = ic; /* NB: needed to set channel */ 1072 ni->ni_vap = vap; 1073 1074 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1075 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1076 ieee80211_node_initref(ni); /* mark referenced */ 1077 /* NB: required by ieee80211_fix_rate */ 1078 ieee80211_node_set_chan(ni, bss->ni_chan); 1079 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, 1080 IEEE80211_KEYIX_NONE); 1081 ni->ni_txpower = bss->ni_txpower; 1082 /* XXX optimize away */ 1083 ieee80211_psq_init(&ni->ni_psq, "unknown"); 1084 IEEE80211_NODE_WDSQ_INIT(ni, "unknown"); 1085 } else { 1086 /* XXX msg */ 1087 vap->iv_stats.is_rx_nodealloc++; 1088 } 1089 return ni; 1090} 1091 1092struct ieee80211_node * 1093ieee80211_dup_bss(struct ieee80211vap *vap, 1094 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1095{ 1096 struct ieee80211com *ic = vap->iv_ic; 1097 struct ieee80211_node *ni; 1098 1099 ni = ieee80211_alloc_node(&ic->ic_sta, vap, macaddr); 1100 if (ni != NULL) { 1101 struct ieee80211_node *bss = vap->iv_bss; 1102 /* 1103 * Inherit from iv_bss. 1104 */ 1105 copy_bss(ni, bss); 1106 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1107 ieee80211_node_set_chan(ni, bss->ni_chan); 1108 } 1109 return ni; 1110} 1111 1112/* 1113 * Create a bss node for a legacy WDS vap. The far end does 1114 * not associate so we just create create a new node and 1115 * simulate an association. The caller is responsible for 1116 * installing the node as the bss node and handling any further 1117 * setup work like authorizing the port. 1118 */ 1119struct ieee80211_node * 1120ieee80211_node_create_wds(struct ieee80211vap *vap, 1121 const uint8_t bssid[IEEE80211_ADDR_LEN], struct ieee80211_channel *chan) 1122{ 1123 struct ieee80211com *ic = vap->iv_ic; 1124 struct ieee80211_node *ni; 1125 1126 /* XXX check if node already in sta table? */ 1127 ni = ieee80211_alloc_node(&ic->ic_sta, vap, bssid); 1128 if (ni != NULL) { 1129 ni->ni_wdsvap = vap; 1130 IEEE80211_ADDR_COPY(ni->ni_bssid, bssid); 1131 /* 1132 * Inherit any manually configured settings. 1133 */ 1134 copy_bss(ni, vap->iv_bss); 1135 ieee80211_node_set_chan(ni, chan); 1136 /* NB: propagate ssid so available to WPA supplicant */ 1137 ni->ni_esslen = vap->iv_des_ssid[0].len; 1138 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen); 1139 /* NB: no associd for peer */ 1140 /* 1141 * There are no management frames to use to 1142 * discover neighbor capabilities, so blindly 1143 * propagate the local configuration. 1144 */ 1145 if (vap->iv_flags & IEEE80211_F_WME) 1146 ni->ni_flags |= IEEE80211_NODE_QOS; 1147 if (vap->iv_flags & IEEE80211_F_FF) 1148 ni->ni_flags |= IEEE80211_NODE_FF; 1149 if ((ic->ic_htcaps & IEEE80211_HTC_HT) && 1150 (vap->iv_flags_ext & IEEE80211_FEXT_HT)) { 1151 /* 1152 * Device is HT-capable and HT is enabled for 1153 * the vap; setup HT operation. On return 1154 * ni_chan will be adjusted to an HT channel. 1155 */ 1156 ieee80211_ht_wds_init(ni); 1157 } else { 1158 struct ieee80211_channel *c = ni->ni_chan; 1159 /* 1160 * Force a legacy channel to be used. 1161 */ 1162 c = ieee80211_find_channel(ic, 1163 c->ic_freq, c->ic_flags &~ IEEE80211_CHAN_HT); 1164 KASSERT(c != NULL, ("no legacy channel, %u/%x", 1165 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags)); 1166 ni->ni_chan = c; 1167 } 1168 } 1169 return ni; 1170} 1171 1172struct ieee80211_node * 1173#ifdef IEEE80211_DEBUG_REFCNT 1174ieee80211_find_node_locked_debug(struct ieee80211_node_table *nt, 1175 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1176#else 1177ieee80211_find_node_locked(struct ieee80211_node_table *nt, 1178 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1179#endif 1180{ 1181 struct ieee80211_node *ni; 1182 int hash; 1183 1184 IEEE80211_NODE_LOCK_ASSERT(nt); 1185 1186 hash = IEEE80211_NODE_HASH(macaddr); 1187 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1188 if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1189 ieee80211_ref_node(ni); /* mark referenced */ 1190#ifdef IEEE80211_DEBUG_REFCNT 1191 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1192 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1193 func, line, 1194 ni, ether_sprintf(ni->ni_macaddr), 1195 ieee80211_node_refcnt(ni)); 1196#endif 1197 return ni; 1198 } 1199 } 1200 return NULL; 1201} 1202 1203struct ieee80211_node * 1204#ifdef IEEE80211_DEBUG_REFCNT 1205ieee80211_find_node_debug(struct ieee80211_node_table *nt, 1206 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1207#else 1208ieee80211_find_node(struct ieee80211_node_table *nt, 1209 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1210#endif 1211{ 1212 struct ieee80211_node *ni; 1213 1214 IEEE80211_NODE_LOCK(nt); 1215 ni = ieee80211_find_node_locked(nt, macaddr); 1216 IEEE80211_NODE_UNLOCK(nt); 1217 return ni; 1218} 1219 1220struct ieee80211_node * 1221#ifdef IEEE80211_DEBUG_REFCNT 1222ieee80211_find_vap_node_locked_debug(struct ieee80211_node_table *nt, 1223 const struct ieee80211vap *vap, 1224 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1225#else 1226ieee80211_find_vap_node_locked(struct ieee80211_node_table *nt, 1227 const struct ieee80211vap *vap, 1228 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1229#endif 1230{ 1231 struct ieee80211_node *ni; 1232 int hash; 1233 1234 IEEE80211_NODE_LOCK_ASSERT(nt); 1235 1236 hash = IEEE80211_NODE_HASH(macaddr); 1237 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1238 if (ni->ni_vap == vap && 1239 IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1240 ieee80211_ref_node(ni); /* mark referenced */ 1241#ifdef IEEE80211_DEBUG_REFCNT 1242 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1243 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1244 func, line, 1245 ni, ether_sprintf(ni->ni_macaddr), 1246 ieee80211_node_refcnt(ni)); 1247#endif 1248 return ni; 1249 } 1250 } 1251 return NULL; 1252} 1253 1254struct ieee80211_node * 1255#ifdef IEEE80211_DEBUG_REFCNT 1256ieee80211_find_vap_node_debug(struct ieee80211_node_table *nt, 1257 const struct ieee80211vap *vap, 1258 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1259#else 1260ieee80211_find_vap_node(struct ieee80211_node_table *nt, 1261 const struct ieee80211vap *vap, 1262 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1263#endif 1264{ 1265 struct ieee80211_node *ni; 1266 1267 IEEE80211_NODE_LOCK(nt); 1268 ni = ieee80211_find_vap_node_locked(nt, vap, macaddr); 1269 IEEE80211_NODE_UNLOCK(nt); 1270 return ni; 1271} 1272 1273/* 1274 * Fake up a node; this handles node discovery in adhoc mode. 1275 * Note that for the driver's benefit we we treat this like 1276 * an association so the driver has an opportunity to setup 1277 * it's private state. 1278 */ 1279struct ieee80211_node * 1280ieee80211_fakeup_adhoc_node(struct ieee80211vap *vap, 1281 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1282{ 1283 struct ieee80211_node *ni; 1284 1285 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1286 "%s: mac<%s>\n", __func__, ether_sprintf(macaddr)); 1287 ni = ieee80211_dup_bss(vap, macaddr); 1288 if (ni != NULL) { 1289 struct ieee80211com *ic = vap->iv_ic; 1290 1291 /* XXX no rate negotiation; just dup */ 1292 ni->ni_rates = vap->iv_bss->ni_rates; 1293 if (vap->iv_opmode == IEEE80211_M_AHDEMO) { 1294 /* 1295 * In adhoc demo mode there are no management 1296 * frames to use to discover neighbor capabilities, 1297 * so blindly propagate the local configuration 1298 * so we can do interesting things (e.g. use 1299 * WME to disable ACK's). 1300 */ 1301 if (vap->iv_flags & IEEE80211_F_WME) 1302 ni->ni_flags |= IEEE80211_NODE_QOS; 1303 if (vap->iv_flags & IEEE80211_F_FF) 1304 ni->ni_flags |= IEEE80211_NODE_FF; 1305 } 1306 node_setuptxparms(ni); 1307 if (ic->ic_newassoc != NULL) 1308 ic->ic_newassoc(ni, 1); 1309 /* XXX not right for 802.1x/WPA */ 1310 ieee80211_node_authorize(ni); 1311 } 1312 return ni; 1313} 1314 1315void 1316ieee80211_init_neighbor(struct ieee80211_node *ni, 1317 const struct ieee80211_frame *wh, 1318 const struct ieee80211_scanparams *sp) 1319{ 1320 ni->ni_esslen = sp->ssid[1]; 1321 memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]); 1322 IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3); 1323 memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp)); 1324 ni->ni_intval = sp->bintval; 1325 ni->ni_capinfo = sp->capinfo; 1326 ni->ni_chan = ni->ni_ic->ic_curchan; 1327 ni->ni_fhdwell = sp->fhdwell; 1328 ni->ni_fhindex = sp->fhindex; 1329 ni->ni_erp = sp->erp; 1330 ni->ni_timoff = sp->timoff; 1331 1332 if (ieee80211_ies_init(&ni->ni_ies, sp->ies, sp->ies_len)) { 1333 ieee80211_ies_expand(&ni->ni_ies); 1334 if (ni->ni_ies.ath_ie != NULL) 1335 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 1336 } 1337 1338 /* NB: must be after ni_chan is setup */ 1339 ieee80211_setup_rates(ni, sp->rates, sp->xrates, 1340 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 1341 IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 1342} 1343 1344/* 1345 * Do node discovery in adhoc mode on receipt of a beacon 1346 * or probe response frame. Note that for the driver's 1347 * benefit we we treat this like an association so the 1348 * driver has an opportunity to setup it's private state. 1349 */ 1350struct ieee80211_node * 1351ieee80211_add_neighbor(struct ieee80211vap *vap, 1352 const struct ieee80211_frame *wh, 1353 const struct ieee80211_scanparams *sp) 1354{ 1355 struct ieee80211_node *ni; 1356 1357 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1358 "%s: mac<%s>\n", __func__, ether_sprintf(wh->i_addr2)); 1359 ni = ieee80211_dup_bss(vap, wh->i_addr2);/* XXX alloc_node? */ 1360 if (ni != NULL) { 1361 struct ieee80211com *ic = vap->iv_ic; 1362 1363 ieee80211_init_neighbor(ni, wh, sp); 1364 node_setuptxparms(ni); 1365 if (ic->ic_newassoc != NULL) 1366 ic->ic_newassoc(ni, 1); 1367 /* XXX not right for 802.1x/WPA */ 1368 ieee80211_node_authorize(ni); 1369 } 1370 return ni; 1371} 1372 1373#define IS_CTL(wh) \ 1374 ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) == IEEE80211_FC0_TYPE_CTL) 1375#define IS_PSPOLL(wh) \ 1376 ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == IEEE80211_FC0_SUBTYPE_PS_POLL) 1377#define IS_BAR(wh) \ 1378 ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == IEEE80211_FC0_SUBTYPE_BAR) 1379#define IS_PROBEREQ(wh) \ 1380 ((wh->i_fc[0] & (IEEE80211_FC0_TYPE_MASK|IEEE80211_FC0_SUBTYPE_MASK)) \ 1381 == (IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ)) 1382#define IS_BCAST_PROBEREQ(wh) \ 1383 (IS_PROBEREQ(wh) && IEEE80211_IS_MULTICAST( \ 1384 ((const struct ieee80211_frame *)(wh))->i_addr3)) 1385 1386static __inline struct ieee80211_node * 1387_find_rxnode(struct ieee80211_node_table *nt, 1388 const struct ieee80211_frame_min *wh) 1389{ 1390 /* XXX 4-address frames? */ 1391 if (IS_CTL(wh) && !IS_PSPOLL(wh) && !IS_BAR(wh) /*&& !IS_RTS(ah)*/) 1392 return ieee80211_find_node_locked(nt, wh->i_addr1); 1393 if (IS_BCAST_PROBEREQ(wh)) 1394 return NULL; /* spam bcast probe req to all vap's */ 1395 return ieee80211_find_node_locked(nt, wh->i_addr2); 1396} 1397 1398/* 1399 * Locate the node for sender, track state, and then pass the 1400 * (referenced) node up to the 802.11 layer for its use. Note 1401 * we can return NULL if the sender is not in the table. 1402 */ 1403struct ieee80211_node * 1404#ifdef IEEE80211_DEBUG_REFCNT 1405ieee80211_find_rxnode_debug(struct ieee80211com *ic, 1406 const struct ieee80211_frame_min *wh, const char *func, int line) 1407#else 1408ieee80211_find_rxnode(struct ieee80211com *ic, 1409 const struct ieee80211_frame_min *wh) 1410#endif 1411{ 1412 struct ieee80211_node_table *nt; 1413 struct ieee80211_node *ni; 1414 1415 nt = &ic->ic_sta; 1416 IEEE80211_NODE_LOCK(nt); 1417 ni = _find_rxnode(nt, wh); 1418 IEEE80211_NODE_UNLOCK(nt); 1419 1420 return ni; 1421} 1422 1423/* 1424 * Like ieee80211_find_rxnode but use the supplied h/w 1425 * key index as a hint to locate the node in the key 1426 * mapping table. If an entry is present at the key 1427 * index we return it; otherwise do a normal lookup and 1428 * update the mapping table if the station has a unicast 1429 * key assigned to it. 1430 */ 1431struct ieee80211_node * 1432#ifdef IEEE80211_DEBUG_REFCNT 1433ieee80211_find_rxnode_withkey_debug(struct ieee80211com *ic, 1434 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix, 1435 const char *func, int line) 1436#else 1437ieee80211_find_rxnode_withkey(struct ieee80211com *ic, 1438 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix) 1439#endif 1440{ 1441 struct ieee80211_node_table *nt; 1442 struct ieee80211_node *ni; 1443 1444 nt = &ic->ic_sta; 1445 IEEE80211_NODE_LOCK(nt); 1446 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) 1447 ni = nt->nt_keyixmap[keyix]; 1448 else 1449 ni = NULL; 1450 if (ni == NULL) { 1451 ni = _find_rxnode(nt, wh); 1452 if (ni != NULL && nt->nt_keyixmap != NULL) { 1453 /* 1454 * If the station has a unicast key cache slot 1455 * assigned update the key->node mapping table. 1456 */ 1457 keyix = ni->ni_ucastkey.wk_rxkeyix; 1458 /* XXX can keyixmap[keyix] != NULL? */ 1459 if (keyix < nt->nt_keyixmax && 1460 nt->nt_keyixmap[keyix] == NULL) { 1461 IEEE80211_DPRINTF(ni->ni_vap, 1462 IEEE80211_MSG_NODE, 1463 "%s: add key map entry %p<%s> refcnt %d\n", 1464 __func__, ni, ether_sprintf(ni->ni_macaddr), 1465 ieee80211_node_refcnt(ni)+1); 1466 nt->nt_keyixmap[keyix] = ieee80211_ref_node(ni); 1467 } 1468 } 1469 } else { 1470 if (IS_BCAST_PROBEREQ(wh)) 1471 ni = NULL; /* spam bcast probe req to all vap's */ 1472 else 1473 ieee80211_ref_node(ni); 1474 } 1475 IEEE80211_NODE_UNLOCK(nt); 1476 1477 return ni; 1478} 1479#undef IS_BCAST_PROBEREQ 1480#undef IS_PROBEREQ 1481#undef IS_BAR 1482#undef IS_PSPOLL 1483#undef IS_CTL 1484 1485/* 1486 * Return a reference to the appropriate node for sending 1487 * a data frame. This handles node discovery in adhoc networks. 1488 */ 1489struct ieee80211_node * 1490#ifdef IEEE80211_DEBUG_REFCNT 1491ieee80211_find_txnode_debug(struct ieee80211vap *vap, 1492 const uint8_t macaddr[IEEE80211_ADDR_LEN], 1493 const char *func, int line) 1494#else 1495ieee80211_find_txnode(struct ieee80211vap *vap, 1496 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1497#endif 1498{ 1499 struct ieee80211_node_table *nt = &vap->iv_ic->ic_sta; 1500 struct ieee80211_node *ni; 1501 1502 /* 1503 * The destination address should be in the node table 1504 * unless this is a multicast/broadcast frame. We can 1505 * also optimize station mode operation, all frames go 1506 * to the bss node. 1507 */ 1508 /* XXX can't hold lock across dup_bss 'cuz of recursive locking */ 1509 IEEE80211_NODE_LOCK(nt); 1510 if (vap->iv_opmode == IEEE80211_M_STA || 1511 vap->iv_opmode == IEEE80211_M_WDS || 1512 IEEE80211_IS_MULTICAST(macaddr)) 1513 ni = ieee80211_ref_node(vap->iv_bss); 1514 else { 1515 ni = ieee80211_find_node_locked(nt, macaddr); 1516 if (vap->iv_opmode == IEEE80211_M_HOSTAP && 1517 (ni != NULL && ni->ni_associd == 0)) { 1518 /* 1519 * Station is not associated; don't permit the 1520 * data frame to be sent by returning NULL. This 1521 * is kinda a kludge but the least intrusive way 1522 * to add this check into all drivers. 1523 */ 1524 ieee80211_unref_node(&ni); /* NB: null's ni */ 1525 } 1526 } 1527 IEEE80211_NODE_UNLOCK(nt); 1528 1529 if (ni == NULL) { 1530 if (vap->iv_opmode == IEEE80211_M_IBSS || 1531 vap->iv_opmode == IEEE80211_M_AHDEMO) { 1532 /* 1533 * In adhoc mode cons up a node for the destination. 1534 * Note that we need an additional reference for the 1535 * caller to be consistent with 1536 * ieee80211_find_node_locked. 1537 */ 1538 ni = ieee80211_fakeup_adhoc_node(vap, macaddr); 1539 if (ni != NULL) 1540 (void) ieee80211_ref_node(ni); 1541 } else { 1542 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, macaddr, 1543 "no node, discard frame (%s)", __func__); 1544 vap->iv_stats.is_tx_nonode++; 1545 } 1546 } 1547 return ni; 1548} 1549 1550static void 1551_ieee80211_free_node(struct ieee80211_node *ni) 1552{ 1553 struct ieee80211_node_table *nt = ni->ni_table; 1554 1555 /* 1556 * NB: careful about referencing the vap as it may be 1557 * gone if the last reference was held by a driver. 1558 * We know the com will always be present so it's safe 1559 * to use ni_ic below to reclaim resources. 1560 */ 1561#if 0 1562 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1563 "%s %p<%s> in %s table\n", __func__, ni, 1564 ether_sprintf(ni->ni_macaddr), 1565 nt != NULL ? nt->nt_name : "<gone>"); 1566#endif 1567 if (ni->ni_associd != 0) { 1568 struct ieee80211vap *vap = ni->ni_vap; 1569 if (vap->iv_aid_bitmap != NULL) 1570 IEEE80211_AID_CLR(vap, ni->ni_associd); 1571 } 1572 if (nt != NULL) { 1573 TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1574 LIST_REMOVE(ni, ni_hash); 1575 } 1576 ni->ni_ic->ic_node_free(ni); 1577} 1578 1579void 1580#ifdef IEEE80211_DEBUG_REFCNT 1581ieee80211_free_node_debug(struct ieee80211_node *ni, const char *func, int line) 1582#else 1583ieee80211_free_node(struct ieee80211_node *ni) 1584#endif 1585{ 1586 struct ieee80211_node_table *nt = ni->ni_table; 1587 1588#ifdef IEEE80211_DEBUG_REFCNT 1589 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1590 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni, 1591 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1); 1592#endif 1593 if (nt != NULL) { 1594 IEEE80211_NODE_LOCK(nt); 1595 if (ieee80211_node_dectestref(ni)) { 1596 /* 1597 * Last reference, reclaim state. 1598 */ 1599 _ieee80211_free_node(ni); 1600 } else if (ieee80211_node_refcnt(ni) == 1 && 1601 nt->nt_keyixmap != NULL) { 1602 ieee80211_keyix keyix; 1603 /* 1604 * Check for a last reference in the key mapping table. 1605 */ 1606 keyix = ni->ni_ucastkey.wk_rxkeyix; 1607 if (keyix < nt->nt_keyixmax && 1608 nt->nt_keyixmap[keyix] == ni) { 1609 IEEE80211_DPRINTF(ni->ni_vap, 1610 IEEE80211_MSG_NODE, 1611 "%s: %p<%s> clear key map entry", __func__, 1612 ni, ether_sprintf(ni->ni_macaddr)); 1613 nt->nt_keyixmap[keyix] = NULL; 1614 ieee80211_node_decref(ni); /* XXX needed? */ 1615 _ieee80211_free_node(ni); 1616 } 1617 } 1618 IEEE80211_NODE_UNLOCK(nt); 1619 } else { 1620 if (ieee80211_node_dectestref(ni)) 1621 _ieee80211_free_node(ni); 1622 } 1623} 1624 1625/* 1626 * Reclaim a unicast key and clear any key cache state. 1627 */ 1628int 1629ieee80211_node_delucastkey(struct ieee80211_node *ni) 1630{ 1631 struct ieee80211com *ic = ni->ni_ic; 1632 struct ieee80211_node_table *nt = &ic->ic_sta; 1633 struct ieee80211_node *nikey; 1634 ieee80211_keyix keyix; 1635 int isowned, status; 1636 1637 /* 1638 * NB: We must beware of LOR here; deleting the key 1639 * can cause the crypto layer to block traffic updates 1640 * which can generate a LOR against the node table lock; 1641 * grab it here and stash the key index for our use below. 1642 * 1643 * Must also beware of recursion on the node table lock. 1644 * When called from node_cleanup we may already have 1645 * the node table lock held. Unfortunately there's no 1646 * way to separate out this path so we must do this 1647 * conditionally. 1648 */ 1649 isowned = IEEE80211_NODE_IS_LOCKED(nt); 1650 if (!isowned) 1651 IEEE80211_NODE_LOCK(nt); 1652 nikey = NULL; 1653 status = 1; /* NB: success */ 1654 if (!IEEE80211_KEY_UNDEFINED(&ni->ni_ucastkey)) { 1655 keyix = ni->ni_ucastkey.wk_rxkeyix; 1656 status = ieee80211_crypto_delkey(ni->ni_vap, &ni->ni_ucastkey); 1657 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) { 1658 nikey = nt->nt_keyixmap[keyix]; 1659 nt->nt_keyixmap[keyix] = NULL;; 1660 } 1661 } 1662 if (!isowned) 1663 IEEE80211_NODE_UNLOCK(nt); 1664 1665 if (nikey != NULL) { 1666 KASSERT(nikey == ni, 1667 ("key map out of sync, ni %p nikey %p", ni, nikey)); 1668 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1669 "%s: delete key map entry %p<%s> refcnt %d\n", 1670 __func__, ni, ether_sprintf(ni->ni_macaddr), 1671 ieee80211_node_refcnt(ni)-1); 1672 ieee80211_free_node(ni); 1673 } 1674 return status; 1675} 1676 1677/* 1678 * Reclaim a node. If this is the last reference count then 1679 * do the normal free work. Otherwise remove it from the node 1680 * table and mark it gone by clearing the back-reference. 1681 */ 1682static void 1683node_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 1684{ 1685 ieee80211_keyix keyix; 1686 1687 IEEE80211_NODE_LOCK_ASSERT(nt); 1688 1689 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1690 "%s: remove %p<%s> from %s table, refcnt %d\n", 1691 __func__, ni, ether_sprintf(ni->ni_macaddr), 1692 nt->nt_name, ieee80211_node_refcnt(ni)-1); 1693 /* 1694 * Clear any entry in the unicast key mapping table. 1695 * We need to do it here so rx lookups don't find it 1696 * in the mapping table even if it's not in the hash 1697 * table. We cannot depend on the mapping table entry 1698 * being cleared because the node may not be free'd. 1699 */ 1700 keyix = ni->ni_ucastkey.wk_rxkeyix; 1701 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax && 1702 nt->nt_keyixmap[keyix] == ni) { 1703 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1704 "%s: %p<%s> clear key map entry\n", 1705 __func__, ni, ether_sprintf(ni->ni_macaddr)); 1706 nt->nt_keyixmap[keyix] = NULL; 1707 ieee80211_node_decref(ni); /* NB: don't need free */ 1708 } 1709 if (!ieee80211_node_dectestref(ni)) { 1710 /* 1711 * Other references are present, just remove the 1712 * node from the table so it cannot be found. When 1713 * the references are dropped storage will be 1714 * reclaimed. 1715 */ 1716 TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1717 LIST_REMOVE(ni, ni_hash); 1718 ni->ni_table = NULL; /* clear reference */ 1719 } else 1720 _ieee80211_free_node(ni); 1721} 1722 1723/* 1724 * Reclaim a (bss) node. Decrement the refcnt and reclaim 1725 * the node if the only other reference to it is in the sta 1726 * table. This is effectively ieee80211_free_node followed 1727 * by node_reclaim when the refcnt is 1 (after the free). 1728 */ 1729static void 1730ieee80211_node_reclaim(struct ieee80211_node *ni) 1731{ 1732 struct ieee80211_node_table *nt = ni->ni_table; 1733 1734 KASSERT(nt != NULL, ("reclaim node not in table")); 1735 1736#ifdef IEEE80211_DEBUG_REFCNT 1737 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1738 "%s %p<%s> refcnt %d\n", __func__, ni, 1739 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1); 1740#endif 1741 IEEE80211_NODE_LOCK(nt); 1742 if (ieee80211_node_dectestref(ni)) { 1743 /* 1744 * Last reference, reclaim state. 1745 */ 1746 _ieee80211_free_node(ni); 1747 nt = NULL; 1748 } else if (ieee80211_node_refcnt(ni) == 1 && 1749 nt->nt_keyixmap != NULL) { 1750 ieee80211_keyix keyix; 1751 /* 1752 * Check for a last reference in the key mapping table. 1753 */ 1754 keyix = ni->ni_ucastkey.wk_rxkeyix; 1755 if (keyix < nt->nt_keyixmax && 1756 nt->nt_keyixmap[keyix] == ni) { 1757 IEEE80211_DPRINTF(ni->ni_vap, 1758 IEEE80211_MSG_NODE, 1759 "%s: %p<%s> clear key map entry", __func__, 1760 ni, ether_sprintf(ni->ni_macaddr)); 1761 nt->nt_keyixmap[keyix] = NULL; 1762 ieee80211_node_decref(ni); /* XXX needed? */ 1763 _ieee80211_free_node(ni); 1764 nt = NULL; 1765 } 1766 } 1767 if (nt != NULL && ieee80211_node_refcnt(ni) == 1) { 1768 /* 1769 * Last reference is in the sta table; complete 1770 * the reclaim. This handles bss nodes being 1771 * recycled: the node has two references, one for 1772 * iv_bss and one for the table. After dropping 1773 * the iv_bss ref above we need to reclaim the sta 1774 * table reference. 1775 */ 1776 ieee80211_node_decref(ni); /* NB: be pendantic */ 1777 _ieee80211_free_node(ni); 1778 } 1779 IEEE80211_NODE_UNLOCK(nt); 1780} 1781 1782/* 1783 * Node table support. 1784 */ 1785 1786static void 1787ieee80211_node_table_init(struct ieee80211com *ic, 1788 struct ieee80211_node_table *nt, 1789 const char *name, int inact, int keyixmax) 1790{ 1791 struct ifnet *ifp = ic->ic_ifp; 1792 1793 nt->nt_ic = ic; 1794 IEEE80211_NODE_LOCK_INIT(nt, ifp->if_xname); 1795 IEEE80211_NODE_ITERATE_LOCK_INIT(nt, ifp->if_xname); 1796 TAILQ_INIT(&nt->nt_node); 1797 nt->nt_name = name; 1798 nt->nt_scangen = 1; 1799 nt->nt_inact_init = inact; 1800 nt->nt_keyixmax = keyixmax; 1801 if (nt->nt_keyixmax > 0) { 1802 MALLOC(nt->nt_keyixmap, struct ieee80211_node **, 1803 keyixmax * sizeof(struct ieee80211_node *), 1804 M_80211_NODE, M_NOWAIT | M_ZERO); 1805 if (nt->nt_keyixmap == NULL) 1806 if_printf(ic->ic_ifp, 1807 "Cannot allocate key index map with %u entries\n", 1808 keyixmax); 1809 } else 1810 nt->nt_keyixmap = NULL; 1811} 1812 1813static void 1814ieee80211_node_table_reset(struct ieee80211_node_table *nt, 1815 struct ieee80211vap *match) 1816{ 1817 struct ieee80211_node *ni, *next; 1818 1819 IEEE80211_NODE_LOCK(nt); 1820 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) { 1821 if (match != NULL && ni->ni_vap != match) 1822 continue; 1823 /* XXX can this happen? if so need's work */ 1824 if (ni->ni_associd != 0) { 1825 struct ieee80211vap *vap = ni->ni_vap; 1826 1827 if (vap->iv_auth->ia_node_leave != NULL) 1828 vap->iv_auth->ia_node_leave(ni); 1829 if (vap->iv_aid_bitmap != NULL) 1830 IEEE80211_AID_CLR(vap, ni->ni_associd); 1831 } 1832 ni->ni_wdsvap = NULL; /* clear reference */ 1833 node_reclaim(nt, ni); 1834 } 1835 if (match != NULL && match->iv_opmode == IEEE80211_M_WDS) { 1836 /* 1837 * Make a separate pass to clear references to this vap 1838 * held by DWDS entries. They will not be matched above 1839 * because ni_vap will point to the ap vap but we still 1840 * need to clear ni_wdsvap when the WDS vap is destroyed 1841 * and/or reset. 1842 */ 1843 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) 1844 if (ni->ni_wdsvap == match) 1845 ni->ni_wdsvap = NULL; 1846 } 1847 IEEE80211_NODE_UNLOCK(nt); 1848} 1849 1850static void 1851ieee80211_node_table_cleanup(struct ieee80211_node_table *nt) 1852{ 1853 ieee80211_node_table_reset(nt, NULL); 1854 if (nt->nt_keyixmap != NULL) { 1855#ifdef DIAGNOSTIC 1856 /* XXX verify all entries are NULL */ 1857 int i; 1858 for (i = 0; i < nt->nt_keyixmax; i++) 1859 if (nt->nt_keyixmap[i] != NULL) 1860 printf("%s: %s[%u] still active\n", __func__, 1861 nt->nt_name, i); 1862#endif 1863 FREE(nt->nt_keyixmap, M_80211_NODE); 1864 nt->nt_keyixmap = NULL; 1865 } 1866 IEEE80211_NODE_ITERATE_LOCK_DESTROY(nt); 1867 IEEE80211_NODE_LOCK_DESTROY(nt); 1868} 1869 1870/* 1871 * Timeout inactive stations and do related housekeeping. 1872 * Note that we cannot hold the node lock while sending a 1873 * frame as this would lead to a LOR. Instead we use a 1874 * generation number to mark nodes that we've scanned and 1875 * drop the lock and restart a scan if we have to time out 1876 * a node. Since we are single-threaded by virtue of 1877 * controlling the inactivity timer we can be sure this will 1878 * process each node only once. 1879 */ 1880static void 1881ieee80211_timeout_stations(struct ieee80211com *ic) 1882{ 1883 struct ieee80211_node_table *nt = &ic->ic_sta; 1884 struct ieee80211vap *vap; 1885 struct ieee80211_node *ni; 1886 int gen = 0; 1887 1888 IEEE80211_NODE_ITERATE_LOCK(nt); 1889 gen = ++nt->nt_scangen; 1890restart: 1891 IEEE80211_NODE_LOCK(nt); 1892 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 1893 if (ni->ni_scangen == gen) /* previously handled */ 1894 continue; 1895 ni->ni_scangen = gen; 1896 /* 1897 * Ignore entries for which have yet to receive an 1898 * authentication frame. These are transient and 1899 * will be reclaimed when the last reference to them 1900 * goes away (when frame xmits complete). 1901 */ 1902 vap = ni->ni_vap; 1903 /* 1904 * Only process stations when in RUN state. This 1905 * insures, for example, that we don't timeout an 1906 * inactive station during CAC. Note that CSA state 1907 * is actually handled in ieee80211_node_timeout as 1908 * it applies to more than timeout processing. 1909 */ 1910 if (vap->iv_state != IEEE80211_S_RUN) 1911 continue; 1912 /* XXX can vap be NULL? */ 1913 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 1914 vap->iv_opmode == IEEE80211_M_STA) && 1915 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 1916 continue; 1917 /* 1918 * Free fragment if not needed anymore 1919 * (last fragment older than 1s). 1920 * XXX doesn't belong here, move to node_age 1921 */ 1922 if (ni->ni_rxfrag[0] != NULL && 1923 ticks > ni->ni_rxfragstamp + hz) { 1924 m_freem(ni->ni_rxfrag[0]); 1925 ni->ni_rxfrag[0] = NULL; 1926 } 1927 if (ni->ni_inact > 0) { 1928 ni->ni_inact--; 1929 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 1930 "%s: inact %u inact_reload %u nrates %u", 1931 __func__, ni->ni_inact, ni->ni_inact_reload, 1932 ni->ni_rates.rs_nrates); 1933 } 1934 /* 1935 * Special case ourself; we may be idle for extended periods 1936 * of time and regardless reclaiming our state is wrong. 1937 * XXX run ic_node_age 1938 */ 1939 if (ni == vap->iv_bss) 1940 continue; 1941 if (ni->ni_associd != 0 || 1942 (vap->iv_opmode == IEEE80211_M_IBSS || 1943 vap->iv_opmode == IEEE80211_M_AHDEMO)) { 1944 /* 1945 * Age/drain resources held by the station. 1946 */ 1947 ic->ic_node_age(ni); 1948 /* 1949 * Probe the station before time it out. We 1950 * send a null data frame which may not be 1951 * universally supported by drivers (need it 1952 * for ps-poll support so it should be...). 1953 * 1954 * XXX don't probe the station unless we've 1955 * received a frame from them (and have 1956 * some idea of the rates they are capable 1957 * of); this will get fixed more properly 1958 * soon with better handling of the rate set. 1959 */ 1960 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 1961 (0 < ni->ni_inact && 1962 ni->ni_inact <= vap->iv_inact_probe) && 1963 ni->ni_rates.rs_nrates != 0) { 1964 IEEE80211_NOTE(vap, 1965 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, 1966 ni, "%s", 1967 "probe station due to inactivity"); 1968 /* 1969 * Grab a reference before unlocking the table 1970 * so the node cannot be reclaimed before we 1971 * send the frame. ieee80211_send_nulldata 1972 * understands we've done this and reclaims the 1973 * ref for us as needed. 1974 */ 1975 ieee80211_ref_node(ni); 1976 IEEE80211_NODE_UNLOCK(nt); 1977 ieee80211_send_nulldata(ni); 1978 /* XXX stat? */ 1979 goto restart; 1980 } 1981 } 1982 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 1983 ni->ni_inact <= 0) { 1984 IEEE80211_NOTE(vap, 1985 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, ni, 1986 "station timed out due to inactivity " 1987 "(refcnt %u)", ieee80211_node_refcnt(ni)); 1988 /* 1989 * Send a deauthenticate frame and drop the station. 1990 * This is somewhat complicated due to reference counts 1991 * and locking. At this point a station will typically 1992 * have a reference count of 1. ieee80211_node_leave 1993 * will do a "free" of the node which will drop the 1994 * reference count. But in the meantime a reference 1995 * wil be held by the deauth frame. The actual reclaim 1996 * of the node will happen either after the tx is 1997 * completed or by ieee80211_node_leave. 1998 * 1999 * Separately we must drop the node lock before sending 2000 * in case the driver takes a lock, as this can result 2001 * in a LOR between the node lock and the driver lock. 2002 */ 2003 ieee80211_ref_node(ni); 2004 IEEE80211_NODE_UNLOCK(nt); 2005 if (ni->ni_associd != 0) { 2006 IEEE80211_SEND_MGMT(ni, 2007 IEEE80211_FC0_SUBTYPE_DEAUTH, 2008 IEEE80211_REASON_AUTH_EXPIRE); 2009 } 2010 ieee80211_node_leave(ni); 2011 ieee80211_free_node(ni); 2012 vap->iv_stats.is_node_timeout++; 2013 goto restart; 2014 } 2015 } 2016 IEEE80211_NODE_UNLOCK(nt); 2017 2018 IEEE80211_NODE_ITERATE_UNLOCK(nt); 2019} 2020 2021/* 2022 * Aggressively reclaim resources. This should be used 2023 * only in a critical situation to reclaim mbuf resources. 2024 */ 2025void 2026ieee80211_drain(struct ieee80211com *ic) 2027{ 2028 struct ieee80211_node_table *nt = &ic->ic_sta; 2029 struct ieee80211vap *vap; 2030 struct ieee80211_node *ni; 2031 2032 IEEE80211_NODE_LOCK(nt); 2033 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2034 /* 2035 * Ignore entries for which have yet to receive an 2036 * authentication frame. These are transient and 2037 * will be reclaimed when the last reference to them 2038 * goes away (when frame xmits complete). 2039 */ 2040 vap = ni->ni_vap; 2041 /* 2042 * Only process stations when in RUN state. This 2043 * insures, for example, that we don't timeout an 2044 * inactive station during CAC. Note that CSA state 2045 * is actually handled in ieee80211_node_timeout as 2046 * it applies to more than timeout processing. 2047 */ 2048 if (vap->iv_state != IEEE80211_S_RUN) 2049 continue; 2050 /* XXX can vap be NULL? */ 2051 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 2052 vap->iv_opmode == IEEE80211_M_STA) && 2053 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 2054 continue; 2055 /* 2056 * Free fragments. 2057 * XXX doesn't belong here, move to node_drain 2058 */ 2059 if (ni->ni_rxfrag[0] != NULL) { 2060 m_freem(ni->ni_rxfrag[0]); 2061 ni->ni_rxfrag[0] = NULL; 2062 } 2063 /* 2064 * Drain resources held by the station. 2065 */ 2066 ic->ic_node_drain(ni); 2067 } 2068 IEEE80211_NODE_UNLOCK(nt); 2069} 2070 2071/* 2072 * Per-ieee80211com inactivity timer callback. 2073 */ 2074void 2075ieee80211_node_timeout(void *arg) 2076{ 2077 struct ieee80211com *ic = arg; 2078 2079 /* 2080 * Defer timeout processing if a channel switch is pending. 2081 * We typically need to be mute so not doing things that 2082 * might generate frames is good to handle in one place. 2083 * Supressing the station timeout processing may extend the 2084 * lifetime of inactive stations (by not decrementing their 2085 * idle counters) but this should be ok unless the CSA is 2086 * active for an unusually long time. 2087 */ 2088 if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) { 2089 ieee80211_scan_timeout(ic); 2090 ieee80211_timeout_stations(ic); 2091 2092 IEEE80211_LOCK(ic); 2093 ieee80211_erp_timeout(ic); 2094 ieee80211_ht_timeout(ic); 2095 IEEE80211_UNLOCK(ic); 2096 } 2097 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, 2098 ieee80211_node_timeout, ic); 2099} 2100 2101void 2102ieee80211_iterate_nodes(struct ieee80211_node_table *nt, 2103 ieee80211_iter_func *f, void *arg) 2104{ 2105 struct ieee80211_node *ni; 2106 u_int gen; 2107 2108 IEEE80211_NODE_ITERATE_LOCK(nt); 2109 gen = ++nt->nt_scangen; 2110restart: 2111 IEEE80211_NODE_LOCK(nt); 2112 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2113 if (ni->ni_scangen != gen) { 2114 ni->ni_scangen = gen; 2115 (void) ieee80211_ref_node(ni); 2116 IEEE80211_NODE_UNLOCK(nt); 2117 (*f)(arg, ni); 2118 ieee80211_free_node(ni); 2119 goto restart; 2120 } 2121 } 2122 IEEE80211_NODE_UNLOCK(nt); 2123 2124 IEEE80211_NODE_ITERATE_UNLOCK(nt); 2125} 2126 2127void 2128ieee80211_dump_node(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 2129{ 2130 printf("0x%p: mac %s refcnt %d\n", ni, 2131 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)); 2132 printf("\tscangen %u authmode %u flags 0x%x\n", 2133 ni->ni_scangen, ni->ni_authmode, ni->ni_flags); 2134 printf("\tassocid 0x%x txpower %u vlan %u\n", 2135 ni->ni_associd, ni->ni_txpower, ni->ni_vlan); 2136 printf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n", 2137 ni->ni_txseqs[IEEE80211_NONQOS_TID], 2138 ni->ni_rxseqs[IEEE80211_NONQOS_TID] >> IEEE80211_SEQ_SEQ_SHIFT, 2139 ni->ni_rxseqs[IEEE80211_NONQOS_TID] & IEEE80211_SEQ_FRAG_MASK, 2140 ni->ni_rxfragstamp); 2141 printf("\trstamp %u rssi %d noise %d intval %u capinfo 0x%x\n", 2142 ni->ni_rstamp, node_getrssi(ni), ni->ni_noise, 2143 ni->ni_intval, ni->ni_capinfo); 2144 printf("\tbssid %s essid \"%.*s\" channel %u:0x%x\n", 2145 ether_sprintf(ni->ni_bssid), 2146 ni->ni_esslen, ni->ni_essid, 2147 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags); 2148 printf("\tinact %u inact_reload %u txrate %u\n", 2149 ni->ni_inact, ni->ni_inact_reload, ni->ni_txrate); 2150 printf("\thtcap %x htparam %x htctlchan %u ht2ndchan %u\n", 2151 ni->ni_htcap, ni->ni_htparam, 2152 ni->ni_htctlchan, ni->ni_ht2ndchan); 2153 printf("\thtopmode %x htstbc %x chw %u\n", 2154 ni->ni_htopmode, ni->ni_htstbc, ni->ni_chw); 2155} 2156 2157void 2158ieee80211_dump_nodes(struct ieee80211_node_table *nt) 2159{ 2160 ieee80211_iterate_nodes(nt, 2161 (ieee80211_iter_func *) ieee80211_dump_node, nt); 2162} 2163 2164static void 2165ieee80211_notify_erp_locked(struct ieee80211com *ic) 2166{ 2167 struct ieee80211vap *vap; 2168 2169 IEEE80211_LOCK_ASSERT(ic); 2170 2171 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 2172 if (vap->iv_opmode == IEEE80211_M_HOSTAP) 2173 ieee80211_beacon_notify(vap, IEEE80211_BEACON_ERP); 2174} 2175 2176void 2177ieee80211_notify_erp(struct ieee80211com *ic) 2178{ 2179 IEEE80211_LOCK(ic); 2180 ieee80211_notify_erp_locked(ic); 2181 IEEE80211_UNLOCK(ic); 2182} 2183 2184/* 2185 * Handle a station joining an 11g network. 2186 */ 2187static void 2188ieee80211_node_join_11g(struct ieee80211_node *ni) 2189{ 2190 struct ieee80211com *ic = ni->ni_ic; 2191 2192 IEEE80211_LOCK_ASSERT(ic); 2193 2194 /* 2195 * Station isn't capable of short slot time. Bump 2196 * the count of long slot time stations and disable 2197 * use of short slot time. Note that the actual switch 2198 * over to long slot time use may not occur until the 2199 * next beacon transmission (per sec. 7.3.1.4 of 11g). 2200 */ 2201 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2202 ic->ic_longslotsta++; 2203 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2204 "station needs long slot time, count %d", 2205 ic->ic_longslotsta); 2206 /* XXX vap's w/ conflicting needs won't work */ 2207 if (!IEEE80211_IS_CHAN_108G(ic->ic_bsschan)) { 2208 /* 2209 * Don't force slot time when switched to turbo 2210 * mode as non-ERP stations won't be present; this 2211 * need only be done when on the normal G channel. 2212 */ 2213 ieee80211_set_shortslottime(ic, 0); 2214 } 2215 } 2216 /* 2217 * If the new station is not an ERP station 2218 * then bump the counter and enable protection 2219 * if configured. 2220 */ 2221 if (!ieee80211_iserp_rateset(&ni->ni_rates)) { 2222 ic->ic_nonerpsta++; 2223 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2224 "station is !ERP, %d non-ERP stations associated", 2225 ic->ic_nonerpsta); 2226 /* 2227 * If station does not support short preamble 2228 * then we must enable use of Barker preamble. 2229 */ 2230 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) { 2231 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2232 "%s", "station needs long preamble"); 2233 ic->ic_flags |= IEEE80211_F_USEBARKER; 2234 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; 2235 } 2236 /* 2237 * If protection is configured and this is the first 2238 * indication we should use protection, enable it. 2239 */ 2240 if (ic->ic_protmode != IEEE80211_PROT_NONE && 2241 ic->ic_nonerpsta == 1 && 2242 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2243 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2244 "%s: enable use of protection\n", __func__); 2245 ic->ic_flags |= IEEE80211_F_USEPROT; 2246 ieee80211_notify_erp_locked(ic); 2247 } 2248 } else 2249 ni->ni_flags |= IEEE80211_NODE_ERP; 2250} 2251 2252void 2253ieee80211_node_join(struct ieee80211_node *ni, int resp) 2254{ 2255 struct ieee80211com *ic = ni->ni_ic; 2256 struct ieee80211vap *vap = ni->ni_vap; 2257 int newassoc; 2258 2259 if (ni->ni_associd == 0) { 2260 uint16_t aid; 2261 2262 KASSERT(vap->iv_aid_bitmap != NULL, ("no aid bitmap")); 2263 /* 2264 * It would be good to search the bitmap 2265 * more efficiently, but this will do for now. 2266 */ 2267 for (aid = 1; aid < vap->iv_max_aid; aid++) { 2268 if (!IEEE80211_AID_ISSET(vap, aid)) 2269 break; 2270 } 2271 if (aid >= vap->iv_max_aid) { 2272 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_TOOMANY); 2273 ieee80211_node_leave(ni); 2274 return; 2275 } 2276 ni->ni_associd = aid | 0xc000; 2277 ni->ni_jointime = time_uptime; 2278 IEEE80211_LOCK(ic); 2279 IEEE80211_AID_SET(vap, ni->ni_associd); 2280 vap->iv_sta_assoc++; 2281 ic->ic_sta_assoc++; 2282 2283 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2284 ieee80211_ht_node_join(ni); 2285 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2286 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2287 ieee80211_node_join_11g(ni); 2288 IEEE80211_UNLOCK(ic); 2289 2290 newassoc = 1; 2291 } else 2292 newassoc = 0; 2293 2294 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2295 "station associated at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s", 2296 IEEE80211_NODE_AID(ni), 2297 ic->ic_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long", 2298 ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long", 2299 ic->ic_flags & IEEE80211_F_USEPROT ? ", protection" : "", 2300 ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "", 2301 ni->ni_flags & IEEE80211_NODE_HT ? 2302 (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "", 2303 ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "", 2304 ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" : 2305 ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "", 2306 ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "", 2307 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ? 2308 ", fast-frames" : "", 2309 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ? 2310 ", turbo" : "" 2311 ); 2312 2313 node_setuptxparms(ni); 2314 /* give driver a chance to setup state like ni_txrate */ 2315 if (ic->ic_newassoc != NULL) 2316 ic->ic_newassoc(ni, newassoc); 2317 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_SUCCESS); 2318 /* tell the authenticator about new station */ 2319 if (vap->iv_auth->ia_node_join != NULL) 2320 vap->iv_auth->ia_node_join(ni); 2321 ieee80211_notify_node_join(ni, 2322 resp == IEEE80211_FC0_SUBTYPE_ASSOC_RESP); 2323} 2324 2325static void 2326disable_protection(struct ieee80211com *ic) 2327{ 2328 KASSERT(ic->ic_nonerpsta == 0 && 2329 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0, 2330 ("%d non ERP stations, flags 0x%x", ic->ic_nonerpsta, 2331 ic->ic_flags_ext)); 2332 2333 ic->ic_flags &= ~IEEE80211_F_USEPROT; 2334 /* XXX verify mode? */ 2335 if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) { 2336 ic->ic_flags |= IEEE80211_F_SHPREAMBLE; 2337 ic->ic_flags &= ~IEEE80211_F_USEBARKER; 2338 } 2339 ieee80211_notify_erp_locked(ic); 2340} 2341 2342/* 2343 * Handle a station leaving an 11g network. 2344 */ 2345static void 2346ieee80211_node_leave_11g(struct ieee80211_node *ni) 2347{ 2348 struct ieee80211com *ic = ni->ni_ic; 2349 2350 IEEE80211_LOCK_ASSERT(ic); 2351 2352 KASSERT(IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan), 2353 ("not in 11g, bss %u:0x%x", ic->ic_bsschan->ic_freq, 2354 ic->ic_bsschan->ic_flags)); 2355 2356 /* 2357 * If a long slot station do the slot time bookkeeping. 2358 */ 2359 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2360 KASSERT(ic->ic_longslotsta > 0, 2361 ("bogus long slot station count %d", ic->ic_longslotsta)); 2362 ic->ic_longslotsta--; 2363 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2364 "long slot time station leaves, count now %d", 2365 ic->ic_longslotsta); 2366 if (ic->ic_longslotsta == 0) { 2367 /* 2368 * Re-enable use of short slot time if supported 2369 * and not operating in IBSS mode (per spec). 2370 */ 2371 if ((ic->ic_caps & IEEE80211_C_SHSLOT) && 2372 ic->ic_opmode != IEEE80211_M_IBSS) { 2373 IEEE80211_DPRINTF(ni->ni_vap, 2374 IEEE80211_MSG_ASSOC, 2375 "%s: re-enable use of short slot time\n", 2376 __func__); 2377 ieee80211_set_shortslottime(ic, 1); 2378 } 2379 } 2380 } 2381 /* 2382 * If a non-ERP station do the protection-related bookkeeping. 2383 */ 2384 if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) { 2385 KASSERT(ic->ic_nonerpsta > 0, 2386 ("bogus non-ERP station count %d", ic->ic_nonerpsta)); 2387 ic->ic_nonerpsta--; 2388 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2389 "non-ERP station leaves, count now %d%s", ic->ic_nonerpsta, 2390 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) ? 2391 " (non-ERP sta present)" : ""); 2392 if (ic->ic_nonerpsta == 0 && 2393 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2394 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2395 "%s: disable use of protection\n", __func__); 2396 disable_protection(ic); 2397 } 2398 } 2399} 2400 2401/* 2402 * Time out presence of an overlapping bss with non-ERP 2403 * stations. When operating in hostap mode we listen for 2404 * beacons from other stations and if we identify a non-ERP 2405 * station is present we enable protection. To identify 2406 * when all non-ERP stations are gone we time out this 2407 * condition. 2408 */ 2409static void 2410ieee80211_erp_timeout(struct ieee80211com *ic) 2411{ 2412 2413 IEEE80211_LOCK_ASSERT(ic); 2414 2415 if ((ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) && 2416 time_after(ticks, ic->ic_lastnonerp + IEEE80211_NONERP_PRESENT_AGE)) { 2417#if 0 2418 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni, 2419 "%s", "age out non-ERP sta present on channel"); 2420#endif 2421 ic->ic_flags_ext &= ~IEEE80211_FEXT_NONERP_PR; 2422 if (ic->ic_nonerpsta == 0) 2423 disable_protection(ic); 2424 } 2425} 2426 2427/* 2428 * Handle bookkeeping for station deauthentication/disassociation 2429 * when operating as an ap. 2430 */ 2431void 2432ieee80211_node_leave(struct ieee80211_node *ni) 2433{ 2434 struct ieee80211com *ic = ni->ni_ic; 2435 struct ieee80211vap *vap = ni->ni_vap; 2436 struct ieee80211_node_table *nt = ni->ni_table; 2437 2438 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2439 "station with aid %d leaves", IEEE80211_NODE_AID(ni)); 2440 2441 KASSERT(vap->iv_opmode != IEEE80211_M_STA, 2442 ("unexpected operating mode %u", vap->iv_opmode)); 2443 /* 2444 * If node wasn't previously associated all 2445 * we need to do is reclaim the reference. 2446 */ 2447 /* XXX ibss mode bypasses 11g and notification */ 2448 if (ni->ni_associd == 0) 2449 goto done; 2450 /* 2451 * Tell the authenticator the station is leaving. 2452 * Note that we must do this before yanking the 2453 * association id as the authenticator uses the 2454 * associd to locate it's state block. 2455 */ 2456 if (vap->iv_auth->ia_node_leave != NULL) 2457 vap->iv_auth->ia_node_leave(ni); 2458 2459 IEEE80211_LOCK(ic); 2460 IEEE80211_AID_CLR(vap, ni->ni_associd); 2461 ni->ni_associd = 0; 2462 vap->iv_sta_assoc--; 2463 ic->ic_sta_assoc--; 2464 2465 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2466 ieee80211_ht_node_leave(ni); 2467 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2468 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2469 ieee80211_node_leave_11g(ni); 2470 IEEE80211_UNLOCK(ic); 2471 /* 2472 * Cleanup station state. In particular clear various 2473 * state that might otherwise be reused if the node 2474 * is reused before the reference count goes to zero 2475 * (and memory is reclaimed). 2476 */ 2477 ieee80211_sta_leave(ni); 2478done: 2479 /* 2480 * Remove the node from any table it's recorded in and 2481 * drop the caller's reference. Removal from the table 2482 * is important to insure the node is not reprocessed 2483 * for inactivity. 2484 */ 2485 if (nt != NULL) { 2486 IEEE80211_NODE_LOCK(nt); 2487 node_reclaim(nt, ni); 2488 IEEE80211_NODE_UNLOCK(nt); 2489 } else 2490 ieee80211_free_node(ni); 2491} 2492 2493struct rssiinfo { 2494 struct ieee80211vap *vap; 2495 int rssi_samples; 2496 uint32_t rssi_total; 2497}; 2498 2499static void 2500get_hostap_rssi(void *arg, struct ieee80211_node *ni) 2501{ 2502 struct rssiinfo *info = arg; 2503 struct ieee80211vap *vap = ni->ni_vap; 2504 int8_t rssi; 2505 2506 if (info->vap != vap) 2507 return; 2508 /* only associated stations */ 2509 if (ni->ni_associd == 0) 2510 return; 2511 rssi = vap->iv_ic->ic_node_getrssi(ni); 2512 if (rssi != 0) { 2513 info->rssi_samples++; 2514 info->rssi_total += rssi; 2515 } 2516} 2517 2518static void 2519get_adhoc_rssi(void *arg, struct ieee80211_node *ni) 2520{ 2521 struct rssiinfo *info = arg; 2522 struct ieee80211vap *vap = ni->ni_vap; 2523 int8_t rssi; 2524 2525 if (info->vap != vap) 2526 return; 2527 /* only neighbors */ 2528 /* XXX check bssid */ 2529 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 2530 return; 2531 rssi = vap->iv_ic->ic_node_getrssi(ni); 2532 if (rssi != 0) { 2533 info->rssi_samples++; 2534 info->rssi_total += rssi; 2535 } 2536} 2537 2538int8_t 2539ieee80211_getrssi(struct ieee80211vap *vap) 2540{ 2541#define NZ(x) ((x) == 0 ? 1 : (x)) 2542 struct ieee80211com *ic = vap->iv_ic; 2543 struct rssiinfo info; 2544 2545 info.rssi_total = 0; 2546 info.rssi_samples = 0; 2547 info.vap = vap; 2548 switch (vap->iv_opmode) { 2549 case IEEE80211_M_IBSS: /* average of all ibss neighbors */ 2550 case IEEE80211_M_AHDEMO: /* average of all neighbors */ 2551 ieee80211_iterate_nodes(&ic->ic_sta, get_adhoc_rssi, &info); 2552 break; 2553 case IEEE80211_M_HOSTAP: /* average of all associated stations */ 2554 ieee80211_iterate_nodes(&ic->ic_sta, get_hostap_rssi, &info); 2555 break; 2556 case IEEE80211_M_MONITOR: /* XXX */ 2557 case IEEE80211_M_STA: /* use stats from associated ap */ 2558 default: 2559 if (vap->iv_bss != NULL) 2560 info.rssi_total = ic->ic_node_getrssi(vap->iv_bss); 2561 info.rssi_samples = 1; 2562 break; 2563 } 2564 return info.rssi_total / NZ(info.rssi_samples); 2565#undef NZ 2566} 2567 2568void 2569ieee80211_getsignal(struct ieee80211vap *vap, int8_t *rssi, int8_t *noise) 2570{ 2571 2572 if (vap->iv_bss == NULL) /* NB: shouldn't happen */ 2573 return; 2574 vap->iv_ic->ic_node_getsignal(vap->iv_bss, rssi, noise); 2575 /* for non-station mode return avg'd rssi accounting */ 2576 if (vap->iv_opmode != IEEE80211_M_STA) 2577 *rssi = ieee80211_getrssi(vap); 2578} 2579