ieee80211_node.c revision 219602
1/*- 2 * Copyright (c) 2001 Atsushi Onoe 3 * Copyright (c) 2002-2009 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 219602 2011-03-13 12:16:23Z bschmidt $"); 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#ifdef IEEE80211_SUPPORT_SUPERG 47#include <net80211/ieee80211_superg.h> 48#endif 49#ifdef IEEE80211_SUPPORT_TDMA 50#include <net80211/ieee80211_tdma.h> 51#endif 52#include <net80211/ieee80211_wds.h> 53#include <net80211/ieee80211_mesh.h> 54#include <net80211/ieee80211_ratectl.h> 55 56#include <net/bpf.h> 57 58/* 59 * IEEE80211_NODE_HASHSIZE must be a power of 2. 60 */ 61CTASSERT((IEEE80211_NODE_HASHSIZE & (IEEE80211_NODE_HASHSIZE-1)) == 0); 62 63/* 64 * Association id's are managed with a bit vector. 65 */ 66#define IEEE80211_AID_SET(_vap, b) \ 67 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] |= \ 68 (1 << (IEEE80211_AID(b) % 32))) 69#define IEEE80211_AID_CLR(_vap, b) \ 70 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] &= \ 71 ~(1 << (IEEE80211_AID(b) % 32))) 72#define IEEE80211_AID_ISSET(_vap, b) \ 73 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] & (1 << (IEEE80211_AID(b) % 32))) 74 75#ifdef IEEE80211_DEBUG_REFCNT 76#define REFCNT_LOC "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line 77#else 78#define REFCNT_LOC "%s %p<%s> refcnt %d\n", __func__ 79#endif 80 81static int ieee80211_sta_join1(struct ieee80211_node *); 82 83static struct ieee80211_node *node_alloc(struct ieee80211vap *, 84 const uint8_t [IEEE80211_ADDR_LEN]); 85static void node_cleanup(struct ieee80211_node *); 86static void node_free(struct ieee80211_node *); 87static void node_age(struct ieee80211_node *); 88static int8_t node_getrssi(const struct ieee80211_node *); 89static void node_getsignal(const struct ieee80211_node *, int8_t *, int8_t *); 90static void node_getmimoinfo(const struct ieee80211_node *, 91 struct ieee80211_mimo_info *); 92 93static void _ieee80211_free_node(struct ieee80211_node *); 94 95static void ieee80211_node_table_init(struct ieee80211com *ic, 96 struct ieee80211_node_table *nt, const char *name, 97 int inact, int keymaxix); 98static void ieee80211_node_table_reset(struct ieee80211_node_table *, 99 struct ieee80211vap *); 100static void ieee80211_node_table_cleanup(struct ieee80211_node_table *nt); 101static void ieee80211_erp_timeout(struct ieee80211com *); 102 103MALLOC_DEFINE(M_80211_NODE, "80211node", "802.11 node state"); 104MALLOC_DEFINE(M_80211_NODE_IE, "80211nodeie", "802.11 node ie"); 105 106void 107ieee80211_node_attach(struct ieee80211com *ic) 108{ 109 /* XXX really want maxlen enforced per-sta */ 110 ieee80211_ageq_init(&ic->ic_stageq, ic->ic_max_keyix * 8, 111 "802.11 staging q"); 112 ieee80211_node_table_init(ic, &ic->ic_sta, "station", 113 IEEE80211_INACT_INIT, ic->ic_max_keyix); 114 callout_init(&ic->ic_inact, CALLOUT_MPSAFE); 115 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, 116 ieee80211_node_timeout, ic); 117 118 ic->ic_node_alloc = node_alloc; 119 ic->ic_node_free = node_free; 120 ic->ic_node_cleanup = node_cleanup; 121 ic->ic_node_age = node_age; 122 ic->ic_node_drain = node_age; /* NB: same as age */ 123 ic->ic_node_getrssi = node_getrssi; 124 ic->ic_node_getsignal = node_getsignal; 125 ic->ic_node_getmimoinfo = node_getmimoinfo; 126 127 /* 128 * Set flags to be propagated to all vap's; 129 * these define default behaviour/configuration. 130 */ 131 ic->ic_flags_ext |= IEEE80211_FEXT_INACT; /* inactivity processing */ 132} 133 134void 135ieee80211_node_detach(struct ieee80211com *ic) 136{ 137 138 callout_drain(&ic->ic_inact); 139 ieee80211_node_table_cleanup(&ic->ic_sta); 140 ieee80211_ageq_cleanup(&ic->ic_stageq); 141} 142 143void 144ieee80211_node_vattach(struct ieee80211vap *vap) 145{ 146 /* NB: driver can override */ 147 vap->iv_max_aid = IEEE80211_AID_DEF; 148 149 /* default station inactivity timer setings */ 150 vap->iv_inact_init = IEEE80211_INACT_INIT; 151 vap->iv_inact_auth = IEEE80211_INACT_AUTH; 152 vap->iv_inact_run = IEEE80211_INACT_RUN; 153 vap->iv_inact_probe = IEEE80211_INACT_PROBE; 154 155 IEEE80211_DPRINTF(vap, IEEE80211_MSG_INACT, 156 "%s: init %u auth %u run %u probe %u\n", __func__, 157 vap->iv_inact_init, vap->iv_inact_auth, 158 vap->iv_inact_run, vap->iv_inact_probe); 159} 160 161void 162ieee80211_node_latevattach(struct ieee80211vap *vap) 163{ 164 if (vap->iv_opmode == IEEE80211_M_HOSTAP) { 165 /* XXX should we allow max aid to be zero? */ 166 if (vap->iv_max_aid < IEEE80211_AID_MIN) { 167 vap->iv_max_aid = IEEE80211_AID_MIN; 168 if_printf(vap->iv_ifp, 169 "WARNING: max aid too small, changed to %d\n", 170 vap->iv_max_aid); 171 } 172 vap->iv_aid_bitmap = (uint32_t *) malloc( 173 howmany(vap->iv_max_aid, 32) * sizeof(uint32_t), 174 M_80211_NODE, M_NOWAIT | M_ZERO); 175 if (vap->iv_aid_bitmap == NULL) { 176 /* XXX no way to recover */ 177 printf("%s: no memory for AID bitmap, max aid %d!\n", 178 __func__, vap->iv_max_aid); 179 vap->iv_max_aid = 0; 180 } 181 } 182 183 ieee80211_reset_bss(vap); 184 185 vap->iv_auth = ieee80211_authenticator_get(vap->iv_bss->ni_authmode); 186} 187 188void 189ieee80211_node_vdetach(struct ieee80211vap *vap) 190{ 191 struct ieee80211com *ic = vap->iv_ic; 192 193 ieee80211_node_table_reset(&ic->ic_sta, vap); 194 if (vap->iv_bss != NULL) { 195 ieee80211_free_node(vap->iv_bss); 196 vap->iv_bss = NULL; 197 } 198 if (vap->iv_aid_bitmap != NULL) { 199 free(vap->iv_aid_bitmap, M_80211_NODE); 200 vap->iv_aid_bitmap = NULL; 201 } 202} 203 204/* 205 * Port authorize/unauthorize interfaces for use by an authenticator. 206 */ 207 208void 209ieee80211_node_authorize(struct ieee80211_node *ni) 210{ 211 struct ieee80211vap *vap = ni->ni_vap; 212 213 ni->ni_flags |= IEEE80211_NODE_AUTH; 214 ni->ni_inact_reload = vap->iv_inact_run; 215 ni->ni_inact = ni->ni_inact_reload; 216 217 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 218 "%s: inact_reload %u", __func__, ni->ni_inact_reload); 219} 220 221void 222ieee80211_node_unauthorize(struct ieee80211_node *ni) 223{ 224 struct ieee80211vap *vap = ni->ni_vap; 225 226 ni->ni_flags &= ~IEEE80211_NODE_AUTH; 227 ni->ni_inact_reload = vap->iv_inact_auth; 228 if (ni->ni_inact > ni->ni_inact_reload) 229 ni->ni_inact = ni->ni_inact_reload; 230 231 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 232 "%s: inact_reload %u inact %u", __func__, 233 ni->ni_inact_reload, ni->ni_inact); 234} 235 236/* 237 * Fix tx parameters for a node according to ``association state''. 238 */ 239void 240ieee80211_node_setuptxparms(struct ieee80211_node *ni) 241{ 242 struct ieee80211vap *vap = ni->ni_vap; 243 enum ieee80211_phymode mode; 244 245 if (ni->ni_flags & IEEE80211_NODE_HT) { 246 if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan)) 247 mode = IEEE80211_MODE_11NA; 248 else 249 mode = IEEE80211_MODE_11NG; 250 } else { /* legacy rate handling */ 251 if (IEEE80211_IS_CHAN_ST(ni->ni_chan)) 252 mode = IEEE80211_MODE_STURBO_A; 253 else if (IEEE80211_IS_CHAN_HALF(ni->ni_chan)) 254 mode = IEEE80211_MODE_HALF; 255 else if (IEEE80211_IS_CHAN_QUARTER(ni->ni_chan)) 256 mode = IEEE80211_MODE_QUARTER; 257 /* NB: 108A should be handled as 11a */ 258 else if (IEEE80211_IS_CHAN_A(ni->ni_chan)) 259 mode = IEEE80211_MODE_11A; 260 else if (IEEE80211_IS_CHAN_108G(ni->ni_chan) || 261 (ni->ni_flags & IEEE80211_NODE_ERP)) 262 mode = IEEE80211_MODE_11G; 263 else 264 mode = IEEE80211_MODE_11B; 265 } 266 ni->ni_txparms = &vap->iv_txparms[mode]; 267} 268 269/* 270 * Set/change the channel. The rate set is also updated as 271 * to insure a consistent view by drivers. 272 * XXX should be private but hostap needs it to deal with CSA 273 */ 274void 275ieee80211_node_set_chan(struct ieee80211_node *ni, 276 struct ieee80211_channel *chan) 277{ 278 struct ieee80211com *ic = ni->ni_ic; 279 struct ieee80211vap *vap = ni->ni_vap; 280 enum ieee80211_phymode mode; 281 282 KASSERT(chan != IEEE80211_CHAN_ANYC, ("no channel")); 283 284 ni->ni_chan = chan; 285 mode = ieee80211_chan2mode(chan); 286 if (IEEE80211_IS_CHAN_HT(chan)) { 287 /* 288 * We must install the legacy rate est in ni_rates and the 289 * HT rate set in ni_htrates. 290 */ 291 ni->ni_htrates = *ieee80211_get_suphtrates(ic, chan); 292 /* 293 * Setup bss tx parameters based on operating mode. We 294 * use legacy rates when operating in a mixed HT+non-HT bss 295 * and non-ERP rates in 11g for mixed ERP+non-ERP bss. 296 */ 297 if (mode == IEEE80211_MODE_11NA && 298 (vap->iv_flags_ht & IEEE80211_FHT_PUREN) == 0) 299 mode = IEEE80211_MODE_11A; 300 else if (mode == IEEE80211_MODE_11NG && 301 (vap->iv_flags_ht & IEEE80211_FHT_PUREN) == 0) 302 mode = IEEE80211_MODE_11G; 303 if (mode == IEEE80211_MODE_11G && 304 (vap->iv_flags & IEEE80211_F_PUREG) == 0) 305 mode = IEEE80211_MODE_11B; 306 } 307 ni->ni_txparms = &vap->iv_txparms[mode]; 308 ni->ni_rates = *ieee80211_get_suprates(ic, chan); 309} 310 311static __inline void 312copy_bss(struct ieee80211_node *nbss, const struct ieee80211_node *obss) 313{ 314 /* propagate useful state */ 315 nbss->ni_authmode = obss->ni_authmode; 316 nbss->ni_txpower = obss->ni_txpower; 317 nbss->ni_vlan = obss->ni_vlan; 318 /* XXX statistics? */ 319 /* XXX legacy WDS bssid? */ 320} 321 322void 323ieee80211_create_ibss(struct ieee80211vap* vap, struct ieee80211_channel *chan) 324{ 325 struct ieee80211com *ic = vap->iv_ic; 326 struct ieee80211_node *ni; 327 328 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, 329 "%s: creating %s on channel %u\n", __func__, 330 ieee80211_opmode_name[vap->iv_opmode], 331 ieee80211_chan2ieee(ic, chan)); 332 333 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr); 334 if (ni == NULL) { 335 /* XXX recovery? */ 336 return; 337 } 338 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr); 339 ni->ni_esslen = vap->iv_des_ssid[0].len; 340 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen); 341 if (vap->iv_bss != NULL) 342 copy_bss(ni, vap->iv_bss); 343 ni->ni_intval = ic->ic_bintval; 344 if (vap->iv_flags & IEEE80211_F_PRIVACY) 345 ni->ni_capinfo |= IEEE80211_CAPINFO_PRIVACY; 346 if (ic->ic_phytype == IEEE80211_T_FH) { 347 ni->ni_fhdwell = 200; /* XXX */ 348 ni->ni_fhindex = 1; 349 } 350 if (vap->iv_opmode == IEEE80211_M_IBSS) { 351 vap->iv_flags |= IEEE80211_F_SIBSS; 352 ni->ni_capinfo |= IEEE80211_CAPINFO_IBSS; /* XXX */ 353 if (vap->iv_flags & IEEE80211_F_DESBSSID) 354 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid); 355 else { 356 get_random_bytes(ni->ni_bssid, IEEE80211_ADDR_LEN); 357 /* clear group bit, add local bit */ 358 ni->ni_bssid[0] = (ni->ni_bssid[0] &~ 0x01) | 0x02; 359 } 360 } else if (vap->iv_opmode == IEEE80211_M_AHDEMO) { 361 if (vap->iv_flags & IEEE80211_F_DESBSSID) 362 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid); 363 else 364#ifdef IEEE80211_SUPPORT_TDMA 365 if ((vap->iv_caps & IEEE80211_C_TDMA) == 0) 366#endif 367 memset(ni->ni_bssid, 0, IEEE80211_ADDR_LEN); 368#ifdef IEEE80211_SUPPORT_MESH 369 } else if (vap->iv_opmode == IEEE80211_M_MBSS) { 370 ni->ni_meshidlen = vap->iv_mesh->ms_idlen; 371 memcpy(ni->ni_meshid, vap->iv_mesh->ms_id, ni->ni_meshidlen); 372#endif 373 } 374 /* 375 * Fix the channel and related attributes. 376 */ 377 /* clear DFS CAC state on previous channel */ 378 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC && 379 ic->ic_bsschan->ic_freq != chan->ic_freq && 380 IEEE80211_IS_CHAN_CACDONE(ic->ic_bsschan)) 381 ieee80211_dfs_cac_clear(ic, ic->ic_bsschan); 382 ic->ic_bsschan = chan; 383 ieee80211_node_set_chan(ni, chan); 384 ic->ic_curmode = ieee80211_chan2mode(chan); 385 /* 386 * Do mode-specific setup. 387 */ 388 if (IEEE80211_IS_CHAN_FULL(chan)) { 389 if (IEEE80211_IS_CHAN_ANYG(chan)) { 390 /* 391 * Use a mixed 11b/11g basic rate set. 392 */ 393 ieee80211_setbasicrates(&ni->ni_rates, 394 IEEE80211_MODE_11G); 395 if (vap->iv_flags & IEEE80211_F_PUREG) { 396 /* 397 * Also mark OFDM rates basic so 11b 398 * stations do not join (WiFi compliance). 399 */ 400 ieee80211_addbasicrates(&ni->ni_rates, 401 IEEE80211_MODE_11A); 402 } 403 } else if (IEEE80211_IS_CHAN_B(chan)) { 404 /* 405 * Force pure 11b rate set. 406 */ 407 ieee80211_setbasicrates(&ni->ni_rates, 408 IEEE80211_MODE_11B); 409 } 410 } 411 412 (void) ieee80211_sta_join1(ieee80211_ref_node(ni)); 413} 414 415/* 416 * Reset bss state on transition to the INIT state. 417 * Clear any stations from the table (they have been 418 * deauth'd) and reset the bss node (clears key, rate 419 * etc. state). 420 */ 421void 422ieee80211_reset_bss(struct ieee80211vap *vap) 423{ 424 struct ieee80211com *ic = vap->iv_ic; 425 struct ieee80211_node *ni, *obss; 426 427 ieee80211_node_table_reset(&ic->ic_sta, vap); 428 /* XXX multi-bss: wrong */ 429 ieee80211_reset_erp(ic); 430 431 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr); 432 KASSERT(ni != NULL, ("unable to setup initial BSS node")); 433 obss = vap->iv_bss; 434 vap->iv_bss = ieee80211_ref_node(ni); 435 if (obss != NULL) { 436 copy_bss(ni, obss); 437 ni->ni_intval = ic->ic_bintval; 438 ieee80211_free_node(obss); 439 } else 440 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr); 441} 442 443static int 444match_ssid(const struct ieee80211_node *ni, 445 int nssid, const struct ieee80211_scan_ssid ssids[]) 446{ 447 int i; 448 449 for (i = 0; i < nssid; i++) { 450 if (ni->ni_esslen == ssids[i].len && 451 memcmp(ni->ni_essid, ssids[i].ssid, ni->ni_esslen) == 0) 452 return 1; 453 } 454 return 0; 455} 456 457/* 458 * Test a node for suitability/compatibility. 459 */ 460static int 461check_bss(struct ieee80211vap *vap, struct ieee80211_node *ni) 462{ 463 struct ieee80211com *ic = ni->ni_ic; 464 uint8_t rate; 465 466 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 467 return 0; 468 if (vap->iv_opmode == IEEE80211_M_IBSS) { 469 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 470 return 0; 471 } else { 472 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 473 return 0; 474 } 475 if (vap->iv_flags & IEEE80211_F_PRIVACY) { 476 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 477 return 0; 478 } else { 479 /* XXX does this mean privacy is supported or required? */ 480 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 481 return 0; 482 } 483 rate = ieee80211_fix_rate(ni, &ni->ni_rates, 484 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 485 if (rate & IEEE80211_RATE_BASIC) 486 return 0; 487 if (vap->iv_des_nssid != 0 && 488 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid)) 489 return 0; 490 if ((vap->iv_flags & IEEE80211_F_DESBSSID) && 491 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid)) 492 return 0; 493 return 1; 494} 495 496#ifdef IEEE80211_DEBUG 497/* 498 * Display node suitability/compatibility. 499 */ 500static void 501check_bss_debug(struct ieee80211vap *vap, struct ieee80211_node *ni) 502{ 503 struct ieee80211com *ic = ni->ni_ic; 504 uint8_t rate; 505 int fail; 506 507 fail = 0; 508 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 509 fail |= 0x01; 510 if (vap->iv_opmode == IEEE80211_M_IBSS) { 511 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 512 fail |= 0x02; 513 } else { 514 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 515 fail |= 0x02; 516 } 517 if (vap->iv_flags & IEEE80211_F_PRIVACY) { 518 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 519 fail |= 0x04; 520 } else { 521 /* XXX does this mean privacy is supported or required? */ 522 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 523 fail |= 0x04; 524 } 525 rate = ieee80211_fix_rate(ni, &ni->ni_rates, 526 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 527 if (rate & IEEE80211_RATE_BASIC) 528 fail |= 0x08; 529 if (vap->iv_des_nssid != 0 && 530 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid)) 531 fail |= 0x10; 532 if ((vap->iv_flags & IEEE80211_F_DESBSSID) && 533 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid)) 534 fail |= 0x20; 535 536 printf(" %c %s", fail ? '-' : '+', ether_sprintf(ni->ni_macaddr)); 537 printf(" %s%c", ether_sprintf(ni->ni_bssid), fail & 0x20 ? '!' : ' '); 538 printf(" %3d%c", 539 ieee80211_chan2ieee(ic, ni->ni_chan), fail & 0x01 ? '!' : ' '); 540 printf(" %2dM%c", (rate & IEEE80211_RATE_VAL) / 2, 541 fail & 0x08 ? '!' : ' '); 542 printf(" %4s%c", 543 (ni->ni_capinfo & IEEE80211_CAPINFO_ESS) ? "ess" : 544 (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) ? "ibss" : 545 "????", 546 fail & 0x02 ? '!' : ' '); 547 printf(" %3s%c ", 548 (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) ? "wep" : "no", 549 fail & 0x04 ? '!' : ' '); 550 ieee80211_print_essid(ni->ni_essid, ni->ni_esslen); 551 printf("%s\n", fail & 0x10 ? "!" : ""); 552} 553#endif /* IEEE80211_DEBUG */ 554 555/* 556 * Handle 802.11 ad hoc network merge. The 557 * convention, set by the Wireless Ethernet Compatibility Alliance 558 * (WECA), is that an 802.11 station will change its BSSID to match 559 * the "oldest" 802.11 ad hoc network, on the same channel, that 560 * has the station's desired SSID. The "oldest" 802.11 network 561 * sends beacons with the greatest TSF timestamp. 562 * 563 * The caller is assumed to validate TSF's before attempting a merge. 564 * 565 * Return !0 if the BSSID changed, 0 otherwise. 566 */ 567int 568ieee80211_ibss_merge(struct ieee80211_node *ni) 569{ 570 struct ieee80211vap *vap = ni->ni_vap; 571#ifdef IEEE80211_DEBUG 572 struct ieee80211com *ic = ni->ni_ic; 573#endif 574 575 if (ni == vap->iv_bss || 576 IEEE80211_ADDR_EQ(ni->ni_bssid, vap->iv_bss->ni_bssid)) { 577 /* unchanged, nothing to do */ 578 return 0; 579 } 580 if (!check_bss(vap, ni)) { 581 /* capabilities mismatch */ 582 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 583 "%s: merge failed, capabilities mismatch\n", __func__); 584#ifdef IEEE80211_DEBUG 585 if (ieee80211_msg_assoc(vap)) 586 check_bss_debug(vap, ni); 587#endif 588 vap->iv_stats.is_ibss_capmismatch++; 589 return 0; 590 } 591 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 592 "%s: new bssid %s: %s preamble, %s slot time%s\n", __func__, 593 ether_sprintf(ni->ni_bssid), 594 ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long", 595 ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long", 596 ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : "" 597 ); 598 return ieee80211_sta_join1(ieee80211_ref_node(ni)); 599} 600 601/* 602 * Calculate HT channel promotion flags for all vaps. 603 * This assumes ni_chan have been setup for each vap. 604 */ 605static int 606gethtadjustflags(struct ieee80211com *ic) 607{ 608 struct ieee80211vap *vap; 609 int flags; 610 611 flags = 0; 612 /* XXX locking */ 613 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 614 if (vap->iv_state < IEEE80211_S_RUN) 615 continue; 616 switch (vap->iv_opmode) { 617 case IEEE80211_M_WDS: 618 case IEEE80211_M_STA: 619 case IEEE80211_M_AHDEMO: 620 case IEEE80211_M_HOSTAP: 621 case IEEE80211_M_IBSS: 622 case IEEE80211_M_MBSS: 623 flags |= ieee80211_htchanflags(vap->iv_bss->ni_chan); 624 break; 625 default: 626 break; 627 } 628 } 629 return flags; 630} 631 632/* 633 * Check if the current channel needs to change based on whether 634 * any vap's are using HT20/HT40. This is used to sync the state 635 * of ic_curchan after a channel width change on a running vap. 636 */ 637void 638ieee80211_sync_curchan(struct ieee80211com *ic) 639{ 640 struct ieee80211_channel *c; 641 642 c = ieee80211_ht_adjust_channel(ic, ic->ic_curchan, gethtadjustflags(ic)); 643 if (c != ic->ic_curchan) { 644 ic->ic_curchan = c; 645 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan); 646 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan); 647 IEEE80211_UNLOCK(ic); 648 ic->ic_set_channel(ic); 649 ieee80211_radiotap_chan_change(ic); 650 IEEE80211_LOCK(ic); 651 } 652} 653 654/* 655 * Setup the current channel. The request channel may be 656 * promoted if other vap's are operating with HT20/HT40. 657 */ 658void 659ieee80211_setupcurchan(struct ieee80211com *ic, struct ieee80211_channel *c) 660{ 661 if (ic->ic_htcaps & IEEE80211_HTC_HT) { 662 int flags = gethtadjustflags(ic); 663 /* 664 * Check for channel promotion required to support the 665 * set of running vap's. This assumes we are called 666 * after ni_chan is setup for each vap. 667 */ 668 /* NB: this assumes IEEE80211_FHT_USEHT40 > IEEE80211_FHT_HT */ 669 if (flags > ieee80211_htchanflags(c)) 670 c = ieee80211_ht_adjust_channel(ic, c, flags); 671 } 672 ic->ic_bsschan = ic->ic_curchan = c; 673 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan); 674 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan); 675} 676 677/* 678 * Change the current channel. The channel change is guaranteed to have 679 * happened before the next state change. 680 */ 681void 682ieee80211_setcurchan(struct ieee80211com *ic, struct ieee80211_channel *c) 683{ 684 ieee80211_setupcurchan(ic, c); 685 ieee80211_runtask(ic, &ic->ic_chan_task); 686} 687 688/* 689 * Join the specified IBSS/BSS network. The node is assumed to 690 * be passed in with a held reference. 691 */ 692static int 693ieee80211_sta_join1(struct ieee80211_node *selbs) 694{ 695 struct ieee80211vap *vap = selbs->ni_vap; 696 struct ieee80211com *ic = selbs->ni_ic; 697 struct ieee80211_node *obss; 698 int canreassoc; 699 700 /* 701 * Committed to selbs, setup state. 702 */ 703 obss = vap->iv_bss; 704 /* 705 * Check if old+new node have the same address in which 706 * case we can reassociate when operating in sta mode. 707 */ 708 canreassoc = (obss != NULL && 709 vap->iv_state == IEEE80211_S_RUN && 710 IEEE80211_ADDR_EQ(obss->ni_macaddr, selbs->ni_macaddr)); 711 vap->iv_bss = selbs; /* NB: caller assumed to bump refcnt */ 712 if (obss != NULL) { 713 copy_bss(selbs, obss); 714 ieee80211_node_decref(obss); /* iv_bss reference */ 715 ieee80211_free_node(obss); /* station table reference */ 716 obss = NULL; /* NB: guard against later use */ 717 } 718 719 /* 720 * Delete unusable rates; we've already checked 721 * that the negotiated rate set is acceptable. 722 */ 723 ieee80211_fix_rate(vap->iv_bss, &vap->iv_bss->ni_rates, 724 IEEE80211_F_DODEL | IEEE80211_F_JOIN); 725 726 ieee80211_setcurchan(ic, selbs->ni_chan); 727 /* 728 * Set the erp state (mostly the slot time) to deal with 729 * the auto-select case; this should be redundant if the 730 * mode is locked. 731 */ 732 ieee80211_reset_erp(ic); 733 ieee80211_wme_initparams(vap); 734 735 if (vap->iv_opmode == IEEE80211_M_STA) { 736 if (canreassoc) { 737 /* Reassociate */ 738 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 1); 739 } else { 740 /* 741 * Act as if we received a DEAUTH frame in case we 742 * are invoked from the RUN state. This will cause 743 * us to try to re-authenticate if we are operating 744 * as a station. 745 */ 746 ieee80211_new_state(vap, IEEE80211_S_AUTH, 747 IEEE80211_FC0_SUBTYPE_DEAUTH); 748 } 749 } else 750 ieee80211_new_state(vap, IEEE80211_S_RUN, -1); 751 return 1; 752} 753 754int 755ieee80211_sta_join(struct ieee80211vap *vap, struct ieee80211_channel *chan, 756 const struct ieee80211_scan_entry *se) 757{ 758 struct ieee80211com *ic = vap->iv_ic; 759 struct ieee80211_node *ni; 760 761 ni = ieee80211_alloc_node(&ic->ic_sta, vap, se->se_macaddr); 762 if (ni == NULL) { 763 /* XXX msg */ 764 return 0; 765 } 766 /* 767 * Expand scan state into node's format. 768 * XXX may not need all this stuff 769 */ 770 IEEE80211_ADDR_COPY(ni->ni_bssid, se->se_bssid); 771 ni->ni_esslen = se->se_ssid[1]; 772 memcpy(ni->ni_essid, se->se_ssid+2, ni->ni_esslen); 773 ni->ni_tstamp.tsf = se->se_tstamp.tsf; 774 ni->ni_intval = se->se_intval; 775 ni->ni_capinfo = se->se_capinfo; 776 ni->ni_chan = chan; 777 ni->ni_timoff = se->se_timoff; 778 ni->ni_fhdwell = se->se_fhdwell; 779 ni->ni_fhindex = se->se_fhindex; 780 ni->ni_erp = se->se_erp; 781 IEEE80211_RSSI_LPF(ni->ni_avgrssi, se->se_rssi); 782 ni->ni_noise = se->se_noise; 783 if (vap->iv_opmode == IEEE80211_M_STA) { 784 /* NB: only infrastructure mode requires an associd */ 785 ni->ni_flags |= IEEE80211_NODE_ASSOCID; 786 } 787 788 if (ieee80211_ies_init(&ni->ni_ies, se->se_ies.data, se->se_ies.len)) { 789 ieee80211_ies_expand(&ni->ni_ies); 790#ifdef IEEE80211_SUPPORT_SUPERG 791 if (ni->ni_ies.ath_ie != NULL) 792 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 793#endif 794 if (ni->ni_ies.htcap_ie != NULL) 795 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie); 796 if (ni->ni_ies.htinfo_ie != NULL) 797 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie); 798#ifdef IEEE80211_SUPPORT_MESH 799 if (ni->ni_ies.meshid_ie != NULL) 800 ieee80211_parse_meshid(ni, ni->ni_ies.meshid_ie); 801#endif 802#ifdef IEEE80211_SUPPORT_TDMA 803 if (ni->ni_ies.tdma_ie != NULL) 804 ieee80211_parse_tdma(ni, ni->ni_ies.tdma_ie); 805#endif 806 } 807 808 vap->iv_dtim_period = se->se_dtimperiod; 809 vap->iv_dtim_count = 0; 810 811 /* NB: must be after ni_chan is setup */ 812 ieee80211_setup_rates(ni, se->se_rates, se->se_xrates, 813 IEEE80211_F_DOSORT); 814 if (ieee80211_iserp_rateset(&ni->ni_rates)) 815 ni->ni_flags |= IEEE80211_NODE_ERP; 816 ieee80211_node_setuptxparms(ni); 817 ieee80211_ratectl_node_init(ni); 818 819 return ieee80211_sta_join1(ieee80211_ref_node(ni)); 820} 821 822/* 823 * Leave the specified IBSS/BSS network. The node is assumed to 824 * be passed in with a held reference. 825 */ 826void 827ieee80211_sta_leave(struct ieee80211_node *ni) 828{ 829 struct ieee80211com *ic = ni->ni_ic; 830 831 ic->ic_node_cleanup(ni); 832 ieee80211_notify_node_leave(ni); 833} 834 835/* 836 * Send a deauthenticate frame and drop the station. 837 */ 838void 839ieee80211_node_deauth(struct ieee80211_node *ni, int reason) 840{ 841 /* NB: bump the refcnt to be sure temporay nodes are not reclaimed */ 842 ieee80211_ref_node(ni); 843 if (ni->ni_associd != 0) 844 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH, reason); 845 ieee80211_node_leave(ni); 846 ieee80211_free_node(ni); 847} 848 849static struct ieee80211_node * 850node_alloc(struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 851{ 852 struct ieee80211_node *ni; 853 854 ni = (struct ieee80211_node *) malloc(sizeof(struct ieee80211_node), 855 M_80211_NODE, M_NOWAIT | M_ZERO); 856 return ni; 857} 858 859/* 860 * Initialize an ie blob with the specified data. If previous 861 * data exists re-use the data block. As a side effect we clear 862 * all references to specific ie's; the caller is required to 863 * recalculate them. 864 */ 865int 866ieee80211_ies_init(struct ieee80211_ies *ies, const uint8_t *data, int len) 867{ 868 /* NB: assumes data+len are the last fields */ 869 memset(ies, 0, offsetof(struct ieee80211_ies, data)); 870 if (ies->data != NULL && ies->len != len) { 871 /* data size changed */ 872 free(ies->data, M_80211_NODE_IE); 873 ies->data = NULL; 874 } 875 if (ies->data == NULL) { 876 ies->data = (uint8_t *) malloc(len, M_80211_NODE_IE, M_NOWAIT); 877 if (ies->data == NULL) { 878 ies->len = 0; 879 /* NB: pointers have already been zero'd above */ 880 return 0; 881 } 882 } 883 memcpy(ies->data, data, len); 884 ies->len = len; 885 return 1; 886} 887 888/* 889 * Reclaim storage for an ie blob. 890 */ 891void 892ieee80211_ies_cleanup(struct ieee80211_ies *ies) 893{ 894 if (ies->data != NULL) 895 free(ies->data, M_80211_NODE_IE); 896} 897 898/* 899 * Expand an ie blob data contents and to fillin individual 900 * ie pointers. The data blob is assumed to be well-formed; 901 * we don't do any validity checking of ie lengths. 902 */ 903void 904ieee80211_ies_expand(struct ieee80211_ies *ies) 905{ 906 uint8_t *ie; 907 int ielen; 908 909 ie = ies->data; 910 ielen = ies->len; 911 while (ielen > 0) { 912 switch (ie[0]) { 913 case IEEE80211_ELEMID_VENDOR: 914 if (iswpaoui(ie)) 915 ies->wpa_ie = ie; 916 else if (iswmeoui(ie)) 917 ies->wme_ie = ie; 918#ifdef IEEE80211_SUPPORT_SUPERG 919 else if (isatherosoui(ie)) 920 ies->ath_ie = ie; 921#endif 922#ifdef IEEE80211_SUPPORT_TDMA 923 else if (istdmaoui(ie)) 924 ies->tdma_ie = ie; 925#endif 926 break; 927 case IEEE80211_ELEMID_RSN: 928 ies->rsn_ie = ie; 929 break; 930 case IEEE80211_ELEMID_HTCAP: 931 ies->htcap_ie = ie; 932 break; 933#ifdef IEEE80211_SUPPORT_MESH 934 case IEEE80211_ELEMID_MESHID: 935 ies->meshid_ie = ie; 936 break; 937#endif 938 } 939 ielen -= 2 + ie[1]; 940 ie += 2 + ie[1]; 941 } 942} 943 944/* 945 * Reclaim any resources in a node and reset any critical 946 * state. Typically nodes are free'd immediately after, 947 * but in some cases the storage may be reused so we need 948 * to insure consistent state (should probably fix that). 949 */ 950static void 951node_cleanup(struct ieee80211_node *ni) 952{ 953#define N(a) (sizeof(a)/sizeof(a[0])) 954 struct ieee80211vap *vap = ni->ni_vap; 955 struct ieee80211com *ic = ni->ni_ic; 956 int i; 957 958 /* NB: preserve ni_table */ 959 if (ni->ni_flags & IEEE80211_NODE_PWR_MGT) { 960 if (vap->iv_opmode != IEEE80211_M_STA) 961 vap->iv_ps_sta--; 962 ni->ni_flags &= ~IEEE80211_NODE_PWR_MGT; 963 IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni, 964 "power save mode off, %u sta's in ps mode", vap->iv_ps_sta); 965 } 966 /* 967 * Cleanup any HT-related state. 968 */ 969 if (ni->ni_flags & IEEE80211_NODE_HT) 970 ieee80211_ht_node_cleanup(ni); 971#ifdef IEEE80211_SUPPORT_SUPERG 972 else if (ni->ni_ath_flags & IEEE80211_NODE_ATH) 973 ieee80211_ff_node_cleanup(ni); 974#endif 975#ifdef IEEE80211_SUPPORT_MESH 976 /* 977 * Cleanup any mesh-related state. 978 */ 979 if (vap->iv_opmode == IEEE80211_M_MBSS) 980 ieee80211_mesh_node_cleanup(ni); 981#endif 982 /* 983 * Clear any staging queue entries. 984 */ 985 ieee80211_ageq_drain_node(&ic->ic_stageq, ni); 986 987 /* 988 * Clear AREF flag that marks the authorization refcnt bump 989 * has happened. This is probably not needed as the node 990 * should always be removed from the table so not found but 991 * do it just in case. 992 * Likewise clear the ASSOCID flag as these flags are intended 993 * to be managed in tandem. 994 */ 995 ni->ni_flags &= ~(IEEE80211_NODE_AREF | IEEE80211_NODE_ASSOCID); 996 997 /* 998 * Drain power save queue and, if needed, clear TIM. 999 */ 1000 if (ieee80211_node_psq_drain(ni) != 0 && vap->iv_set_tim != NULL) 1001 vap->iv_set_tim(ni, 0); 1002 1003 ni->ni_associd = 0; 1004 if (ni->ni_challenge != NULL) { 1005 free(ni->ni_challenge, M_80211_NODE); 1006 ni->ni_challenge = NULL; 1007 } 1008 /* 1009 * Preserve SSID, WPA, and WME ie's so the bss node is 1010 * reusable during a re-auth/re-assoc state transition. 1011 * If we remove these data they will not be recreated 1012 * because they come from a probe-response or beacon frame 1013 * which cannot be expected prior to the association-response. 1014 * This should not be an issue when operating in other modes 1015 * as stations leaving always go through a full state transition 1016 * which will rebuild this state. 1017 * 1018 * XXX does this leave us open to inheriting old state? 1019 */ 1020 for (i = 0; i < N(ni->ni_rxfrag); i++) 1021 if (ni->ni_rxfrag[i] != NULL) { 1022 m_freem(ni->ni_rxfrag[i]); 1023 ni->ni_rxfrag[i] = NULL; 1024 } 1025 /* 1026 * Must be careful here to remove any key map entry w/o a LOR. 1027 */ 1028 ieee80211_node_delucastkey(ni); 1029#undef N 1030} 1031 1032static void 1033node_free(struct ieee80211_node *ni) 1034{ 1035 struct ieee80211com *ic = ni->ni_ic; 1036 1037 ieee80211_ratectl_node_deinit(ni); 1038 ic->ic_node_cleanup(ni); 1039 ieee80211_ies_cleanup(&ni->ni_ies); 1040 ieee80211_psq_cleanup(&ni->ni_psq); 1041 free(ni, M_80211_NODE); 1042} 1043 1044static void 1045node_age(struct ieee80211_node *ni) 1046{ 1047 struct ieee80211vap *vap = ni->ni_vap; 1048 1049 IEEE80211_NODE_LOCK_ASSERT(&vap->iv_ic->ic_sta); 1050 1051 /* 1052 * Age frames on the power save queue. 1053 */ 1054 if (ieee80211_node_psq_age(ni) != 0 && 1055 ni->ni_psq.psq_len == 0 && vap->iv_set_tim != NULL) 1056 vap->iv_set_tim(ni, 0); 1057 /* 1058 * Age out HT resources (e.g. frames on the 1059 * A-MPDU reorder queues). 1060 */ 1061 if (ni->ni_associd != 0 && (ni->ni_flags & IEEE80211_NODE_HT)) 1062 ieee80211_ht_node_age(ni); 1063} 1064 1065static int8_t 1066node_getrssi(const struct ieee80211_node *ni) 1067{ 1068 uint32_t avgrssi = ni->ni_avgrssi; 1069 int32_t rssi; 1070 1071 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) 1072 return 0; 1073 rssi = IEEE80211_RSSI_GET(avgrssi); 1074 return rssi < 0 ? 0 : rssi > 127 ? 127 : rssi; 1075} 1076 1077static void 1078node_getsignal(const struct ieee80211_node *ni, int8_t *rssi, int8_t *noise) 1079{ 1080 *rssi = node_getrssi(ni); 1081 *noise = ni->ni_noise; 1082} 1083 1084static void 1085node_getmimoinfo(const struct ieee80211_node *ni, 1086 struct ieee80211_mimo_info *info) 1087{ 1088 /* XXX zero data? */ 1089} 1090 1091struct ieee80211_node * 1092ieee80211_alloc_node(struct ieee80211_node_table *nt, 1093 struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1094{ 1095 struct ieee80211com *ic = nt->nt_ic; 1096 struct ieee80211_node *ni; 1097 int hash; 1098 1099 ni = ic->ic_node_alloc(vap, macaddr); 1100 if (ni == NULL) { 1101 vap->iv_stats.is_rx_nodealloc++; 1102 return NULL; 1103 } 1104 1105 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1106 "%s %p<%s> in %s table\n", __func__, ni, 1107 ether_sprintf(macaddr), nt->nt_name); 1108 1109 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1110 hash = IEEE80211_NODE_HASH(ic, macaddr); 1111 ieee80211_node_initref(ni); /* mark referenced */ 1112 ni->ni_chan = IEEE80211_CHAN_ANYC; 1113 ni->ni_authmode = IEEE80211_AUTH_OPEN; 1114 ni->ni_txpower = ic->ic_txpowlimit; /* max power */ 1115 ni->ni_txparms = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)]; 1116 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE); 1117 ni->ni_avgrssi = IEEE80211_RSSI_DUMMY_MARKER; 1118 ni->ni_inact_reload = nt->nt_inact_init; 1119 ni->ni_inact = ni->ni_inact_reload; 1120 ni->ni_ath_defkeyix = 0x7fff; 1121 ieee80211_psq_init(&ni->ni_psq, "unknown"); 1122#ifdef IEEE80211_SUPPORT_MESH 1123 if (vap->iv_opmode == IEEE80211_M_MBSS) 1124 ieee80211_mesh_node_init(vap, ni); 1125#endif 1126 IEEE80211_NODE_LOCK(nt); 1127 TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list); 1128 LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash); 1129 ni->ni_table = nt; 1130 ni->ni_vap = vap; 1131 ni->ni_ic = ic; 1132 IEEE80211_NODE_UNLOCK(nt); 1133 1134 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 1135 "%s: inact_reload %u", __func__, ni->ni_inact_reload); 1136 1137 ieee80211_ratectl_node_init(ni); 1138 1139 return ni; 1140} 1141 1142/* 1143 * Craft a temporary node suitable for sending a management frame 1144 * to the specified station. We craft only as much state as we 1145 * need to do the work since the node will be immediately reclaimed 1146 * once the send completes. 1147 */ 1148struct ieee80211_node * 1149ieee80211_tmp_node(struct ieee80211vap *vap, 1150 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1151{ 1152 struct ieee80211com *ic = vap->iv_ic; 1153 struct ieee80211_node *ni; 1154 1155 ni = ic->ic_node_alloc(vap, macaddr); 1156 if (ni != NULL) { 1157 struct ieee80211_node *bss = vap->iv_bss; 1158 1159 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1160 "%s %p<%s>\n", __func__, ni, ether_sprintf(macaddr)); 1161 1162 ni->ni_table = NULL; /* NB: pedantic */ 1163 ni->ni_ic = ic; /* NB: needed to set channel */ 1164 ni->ni_vap = vap; 1165 1166 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1167 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1168 ieee80211_node_initref(ni); /* mark referenced */ 1169 /* NB: required by ieee80211_fix_rate */ 1170 ieee80211_node_set_chan(ni, bss->ni_chan); 1171 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, 1172 IEEE80211_KEYIX_NONE); 1173 ni->ni_txpower = bss->ni_txpower; 1174 /* XXX optimize away */ 1175 ieee80211_psq_init(&ni->ni_psq, "unknown"); 1176 1177 ieee80211_ratectl_node_init(ni); 1178 } else { 1179 /* XXX msg */ 1180 vap->iv_stats.is_rx_nodealloc++; 1181 } 1182 return ni; 1183} 1184 1185struct ieee80211_node * 1186ieee80211_dup_bss(struct ieee80211vap *vap, 1187 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1188{ 1189 struct ieee80211com *ic = vap->iv_ic; 1190 struct ieee80211_node *ni; 1191 1192 ni = ieee80211_alloc_node(&ic->ic_sta, vap, macaddr); 1193 if (ni != NULL) { 1194 struct ieee80211_node *bss = vap->iv_bss; 1195 /* 1196 * Inherit from iv_bss. 1197 */ 1198 copy_bss(ni, bss); 1199 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1200 ieee80211_node_set_chan(ni, bss->ni_chan); 1201 } 1202 return ni; 1203} 1204 1205/* 1206 * Create a bss node for a legacy WDS vap. The far end does 1207 * not associate so we just create create a new node and 1208 * simulate an association. The caller is responsible for 1209 * installing the node as the bss node and handling any further 1210 * setup work like authorizing the port. 1211 */ 1212struct ieee80211_node * 1213ieee80211_node_create_wds(struct ieee80211vap *vap, 1214 const uint8_t bssid[IEEE80211_ADDR_LEN], struct ieee80211_channel *chan) 1215{ 1216 struct ieee80211com *ic = vap->iv_ic; 1217 struct ieee80211_node *ni; 1218 1219 /* XXX check if node already in sta table? */ 1220 ni = ieee80211_alloc_node(&ic->ic_sta, vap, bssid); 1221 if (ni != NULL) { 1222 ni->ni_wdsvap = vap; 1223 IEEE80211_ADDR_COPY(ni->ni_bssid, bssid); 1224 /* 1225 * Inherit any manually configured settings. 1226 */ 1227 copy_bss(ni, vap->iv_bss); 1228 ieee80211_node_set_chan(ni, chan); 1229 /* NB: propagate ssid so available to WPA supplicant */ 1230 ni->ni_esslen = vap->iv_des_ssid[0].len; 1231 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen); 1232 /* NB: no associd for peer */ 1233 /* 1234 * There are no management frames to use to 1235 * discover neighbor capabilities, so blindly 1236 * propagate the local configuration. 1237 */ 1238 if (vap->iv_flags & IEEE80211_F_WME) 1239 ni->ni_flags |= IEEE80211_NODE_QOS; 1240#ifdef IEEE80211_SUPPORT_SUPERG 1241 if (vap->iv_flags & IEEE80211_F_FF) 1242 ni->ni_flags |= IEEE80211_NODE_FF; 1243#endif 1244 if ((ic->ic_htcaps & IEEE80211_HTC_HT) && 1245 (vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1246 /* 1247 * Device is HT-capable and HT is enabled for 1248 * the vap; setup HT operation. On return 1249 * ni_chan will be adjusted to an HT channel. 1250 */ 1251 ieee80211_ht_wds_init(ni); 1252 } else { 1253 struct ieee80211_channel *c = ni->ni_chan; 1254 /* 1255 * Force a legacy channel to be used. 1256 */ 1257 c = ieee80211_find_channel(ic, 1258 c->ic_freq, c->ic_flags &~ IEEE80211_CHAN_HT); 1259 KASSERT(c != NULL, ("no legacy channel, %u/%x", 1260 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags)); 1261 ni->ni_chan = c; 1262 } 1263 } 1264 return ni; 1265} 1266 1267struct ieee80211_node * 1268#ifdef IEEE80211_DEBUG_REFCNT 1269ieee80211_find_node_locked_debug(struct ieee80211_node_table *nt, 1270 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1271#else 1272ieee80211_find_node_locked(struct ieee80211_node_table *nt, 1273 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1274#endif 1275{ 1276 struct ieee80211_node *ni; 1277 int hash; 1278 1279 IEEE80211_NODE_LOCK_ASSERT(nt); 1280 1281 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr); 1282 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1283 if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1284 ieee80211_ref_node(ni); /* mark referenced */ 1285#ifdef IEEE80211_DEBUG_REFCNT 1286 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1287 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1288 func, line, 1289 ni, ether_sprintf(ni->ni_macaddr), 1290 ieee80211_node_refcnt(ni)); 1291#endif 1292 return ni; 1293 } 1294 } 1295 return NULL; 1296} 1297 1298struct ieee80211_node * 1299#ifdef IEEE80211_DEBUG_REFCNT 1300ieee80211_find_node_debug(struct ieee80211_node_table *nt, 1301 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1302#else 1303ieee80211_find_node(struct ieee80211_node_table *nt, 1304 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1305#endif 1306{ 1307 struct ieee80211_node *ni; 1308 1309 IEEE80211_NODE_LOCK(nt); 1310 ni = ieee80211_find_node_locked(nt, macaddr); 1311 IEEE80211_NODE_UNLOCK(nt); 1312 return ni; 1313} 1314 1315struct ieee80211_node * 1316#ifdef IEEE80211_DEBUG_REFCNT 1317ieee80211_find_vap_node_locked_debug(struct ieee80211_node_table *nt, 1318 const struct ieee80211vap *vap, 1319 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1320#else 1321ieee80211_find_vap_node_locked(struct ieee80211_node_table *nt, 1322 const struct ieee80211vap *vap, 1323 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1324#endif 1325{ 1326 struct ieee80211_node *ni; 1327 int hash; 1328 1329 IEEE80211_NODE_LOCK_ASSERT(nt); 1330 1331 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr); 1332 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1333 if (ni->ni_vap == vap && 1334 IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1335 ieee80211_ref_node(ni); /* mark referenced */ 1336#ifdef IEEE80211_DEBUG_REFCNT 1337 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1338 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1339 func, line, 1340 ni, ether_sprintf(ni->ni_macaddr), 1341 ieee80211_node_refcnt(ni)); 1342#endif 1343 return ni; 1344 } 1345 } 1346 return NULL; 1347} 1348 1349struct ieee80211_node * 1350#ifdef IEEE80211_DEBUG_REFCNT 1351ieee80211_find_vap_node_debug(struct ieee80211_node_table *nt, 1352 const struct ieee80211vap *vap, 1353 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1354#else 1355ieee80211_find_vap_node(struct ieee80211_node_table *nt, 1356 const struct ieee80211vap *vap, 1357 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1358#endif 1359{ 1360 struct ieee80211_node *ni; 1361 1362 IEEE80211_NODE_LOCK(nt); 1363 ni = ieee80211_find_vap_node_locked(nt, vap, macaddr); 1364 IEEE80211_NODE_UNLOCK(nt); 1365 return ni; 1366} 1367 1368/* 1369 * Fake up a node; this handles node discovery in adhoc mode. 1370 * Note that for the driver's benefit we we treat this like 1371 * an association so the driver has an opportunity to setup 1372 * it's private state. 1373 */ 1374struct ieee80211_node * 1375ieee80211_fakeup_adhoc_node(struct ieee80211vap *vap, 1376 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1377{ 1378 struct ieee80211_node *ni; 1379 1380 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1381 "%s: mac<%s>\n", __func__, ether_sprintf(macaddr)); 1382 ni = ieee80211_dup_bss(vap, macaddr); 1383 if (ni != NULL) { 1384 struct ieee80211com *ic = vap->iv_ic; 1385 1386 /* XXX no rate negotiation; just dup */ 1387 ni->ni_rates = vap->iv_bss->ni_rates; 1388 if (ieee80211_iserp_rateset(&ni->ni_rates)) 1389 ni->ni_flags |= IEEE80211_NODE_ERP; 1390 if (vap->iv_opmode == IEEE80211_M_AHDEMO) { 1391 /* 1392 * In adhoc demo mode there are no management 1393 * frames to use to discover neighbor capabilities, 1394 * so blindly propagate the local configuration 1395 * so we can do interesting things (e.g. use 1396 * WME to disable ACK's). 1397 */ 1398 if (vap->iv_flags & IEEE80211_F_WME) 1399 ni->ni_flags |= IEEE80211_NODE_QOS; 1400#ifdef IEEE80211_SUPPORT_SUPERG 1401 if (vap->iv_flags & IEEE80211_F_FF) 1402 ni->ni_flags |= IEEE80211_NODE_FF; 1403#endif 1404 } 1405 ieee80211_node_setuptxparms(ni); 1406 ieee80211_ratectl_node_init(ni); 1407 if (ic->ic_newassoc != NULL) 1408 ic->ic_newassoc(ni, 1); 1409 /* XXX not right for 802.1x/WPA */ 1410 ieee80211_node_authorize(ni); 1411 } 1412 return ni; 1413} 1414 1415void 1416ieee80211_init_neighbor(struct ieee80211_node *ni, 1417 const struct ieee80211_frame *wh, 1418 const struct ieee80211_scanparams *sp) 1419{ 1420 ni->ni_esslen = sp->ssid[1]; 1421 memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]); 1422 IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3); 1423 memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp)); 1424 ni->ni_intval = sp->bintval; 1425 ni->ni_capinfo = sp->capinfo; 1426 ni->ni_chan = ni->ni_ic->ic_curchan; 1427 ni->ni_fhdwell = sp->fhdwell; 1428 ni->ni_fhindex = sp->fhindex; 1429 ni->ni_erp = sp->erp; 1430 ni->ni_timoff = sp->timoff; 1431#ifdef IEEE80211_SUPPORT_MESH 1432 if (ni->ni_vap->iv_opmode == IEEE80211_M_MBSS) 1433 ieee80211_mesh_init_neighbor(ni, wh, sp); 1434#endif 1435 if (ieee80211_ies_init(&ni->ni_ies, sp->ies, sp->ies_len)) { 1436 ieee80211_ies_expand(&ni->ni_ies); 1437 if (ni->ni_ies.wme_ie != NULL) 1438 ni->ni_flags |= IEEE80211_NODE_QOS; 1439 else 1440 ni->ni_flags &= ~IEEE80211_NODE_QOS; 1441#ifdef IEEE80211_SUPPORT_SUPERG 1442 if (ni->ni_ies.ath_ie != NULL) 1443 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 1444#endif 1445 } 1446 1447 /* NB: must be after ni_chan is setup */ 1448 ieee80211_setup_rates(ni, sp->rates, sp->xrates, 1449 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 1450 IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 1451} 1452 1453/* 1454 * Do node discovery in adhoc mode on receipt of a beacon 1455 * or probe response frame. Note that for the driver's 1456 * benefit we we treat this like an association so the 1457 * driver has an opportunity to setup it's private state. 1458 */ 1459struct ieee80211_node * 1460ieee80211_add_neighbor(struct ieee80211vap *vap, 1461 const struct ieee80211_frame *wh, 1462 const struct ieee80211_scanparams *sp) 1463{ 1464 struct ieee80211_node *ni; 1465 1466 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1467 "%s: mac<%s>\n", __func__, ether_sprintf(wh->i_addr2)); 1468 ni = ieee80211_dup_bss(vap, wh->i_addr2);/* XXX alloc_node? */ 1469 if (ni != NULL) { 1470 struct ieee80211com *ic = vap->iv_ic; 1471 1472 ieee80211_init_neighbor(ni, wh, sp); 1473 if (ieee80211_iserp_rateset(&ni->ni_rates)) 1474 ni->ni_flags |= IEEE80211_NODE_ERP; 1475 ieee80211_node_setuptxparms(ni); 1476 ieee80211_ratectl_node_init(ni); 1477 if (ic->ic_newassoc != NULL) 1478 ic->ic_newassoc(ni, 1); 1479 /* XXX not right for 802.1x/WPA */ 1480 ieee80211_node_authorize(ni); 1481 } 1482 return ni; 1483} 1484 1485#define IS_PROBEREQ(wh) \ 1486 ((wh->i_fc[0] & (IEEE80211_FC0_TYPE_MASK|IEEE80211_FC0_SUBTYPE_MASK)) \ 1487 == (IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ)) 1488#define IS_BCAST_PROBEREQ(wh) \ 1489 (IS_PROBEREQ(wh) && IEEE80211_IS_MULTICAST( \ 1490 ((const struct ieee80211_frame *)(wh))->i_addr3)) 1491 1492static __inline struct ieee80211_node * 1493_find_rxnode(struct ieee80211_node_table *nt, 1494 const struct ieee80211_frame_min *wh) 1495{ 1496 if (IS_BCAST_PROBEREQ(wh)) 1497 return NULL; /* spam bcast probe req to all vap's */ 1498 return ieee80211_find_node_locked(nt, wh->i_addr2); 1499} 1500 1501/* 1502 * Locate the node for sender, track state, and then pass the 1503 * (referenced) node up to the 802.11 layer for its use. Note 1504 * we can return NULL if the sender is not in the table. 1505 */ 1506struct ieee80211_node * 1507#ifdef IEEE80211_DEBUG_REFCNT 1508ieee80211_find_rxnode_debug(struct ieee80211com *ic, 1509 const struct ieee80211_frame_min *wh, const char *func, int line) 1510#else 1511ieee80211_find_rxnode(struct ieee80211com *ic, 1512 const struct ieee80211_frame_min *wh) 1513#endif 1514{ 1515 struct ieee80211_node_table *nt; 1516 struct ieee80211_node *ni; 1517 1518 nt = &ic->ic_sta; 1519 IEEE80211_NODE_LOCK(nt); 1520 ni = _find_rxnode(nt, wh); 1521 IEEE80211_NODE_UNLOCK(nt); 1522 1523 return ni; 1524} 1525 1526/* 1527 * Like ieee80211_find_rxnode but use the supplied h/w 1528 * key index as a hint to locate the node in the key 1529 * mapping table. If an entry is present at the key 1530 * index we return it; otherwise do a normal lookup and 1531 * update the mapping table if the station has a unicast 1532 * key assigned to it. 1533 */ 1534struct ieee80211_node * 1535#ifdef IEEE80211_DEBUG_REFCNT 1536ieee80211_find_rxnode_withkey_debug(struct ieee80211com *ic, 1537 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix, 1538 const char *func, int line) 1539#else 1540ieee80211_find_rxnode_withkey(struct ieee80211com *ic, 1541 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix) 1542#endif 1543{ 1544 struct ieee80211_node_table *nt; 1545 struct ieee80211_node *ni; 1546 1547 nt = &ic->ic_sta; 1548 IEEE80211_NODE_LOCK(nt); 1549 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) 1550 ni = nt->nt_keyixmap[keyix]; 1551 else 1552 ni = NULL; 1553 if (ni == NULL) { 1554 ni = _find_rxnode(nt, wh); 1555 if (ni != NULL && nt->nt_keyixmap != NULL) { 1556 /* 1557 * If the station has a unicast key cache slot 1558 * assigned update the key->node mapping table. 1559 */ 1560 keyix = ni->ni_ucastkey.wk_rxkeyix; 1561 /* XXX can keyixmap[keyix] != NULL? */ 1562 if (keyix < nt->nt_keyixmax && 1563 nt->nt_keyixmap[keyix] == NULL) { 1564 IEEE80211_DPRINTF(ni->ni_vap, 1565 IEEE80211_MSG_NODE, 1566 "%s: add key map entry %p<%s> refcnt %d\n", 1567 __func__, ni, ether_sprintf(ni->ni_macaddr), 1568 ieee80211_node_refcnt(ni)+1); 1569 nt->nt_keyixmap[keyix] = ieee80211_ref_node(ni); 1570 } 1571 } 1572 } else { 1573 if (IS_BCAST_PROBEREQ(wh)) 1574 ni = NULL; /* spam bcast probe req to all vap's */ 1575 else 1576 ieee80211_ref_node(ni); 1577 } 1578 IEEE80211_NODE_UNLOCK(nt); 1579 1580 return ni; 1581} 1582#undef IS_BCAST_PROBEREQ 1583#undef IS_PROBEREQ 1584 1585/* 1586 * Return a reference to the appropriate node for sending 1587 * a data frame. This handles node discovery in adhoc networks. 1588 */ 1589struct ieee80211_node * 1590#ifdef IEEE80211_DEBUG_REFCNT 1591ieee80211_find_txnode_debug(struct ieee80211vap *vap, 1592 const uint8_t macaddr[IEEE80211_ADDR_LEN], 1593 const char *func, int line) 1594#else 1595ieee80211_find_txnode(struct ieee80211vap *vap, 1596 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1597#endif 1598{ 1599 struct ieee80211_node_table *nt = &vap->iv_ic->ic_sta; 1600 struct ieee80211_node *ni; 1601 1602 /* 1603 * The destination address should be in the node table 1604 * unless this is a multicast/broadcast frame. We can 1605 * also optimize station mode operation, all frames go 1606 * to the bss node. 1607 */ 1608 /* XXX can't hold lock across dup_bss 'cuz of recursive locking */ 1609 IEEE80211_NODE_LOCK(nt); 1610 if (vap->iv_opmode == IEEE80211_M_STA || 1611 vap->iv_opmode == IEEE80211_M_WDS || 1612 IEEE80211_IS_MULTICAST(macaddr)) 1613 ni = ieee80211_ref_node(vap->iv_bss); 1614 else 1615 ni = ieee80211_find_node_locked(nt, macaddr); 1616 IEEE80211_NODE_UNLOCK(nt); 1617 1618 if (ni == NULL) { 1619 if (vap->iv_opmode == IEEE80211_M_IBSS || 1620 vap->iv_opmode == IEEE80211_M_AHDEMO) { 1621 /* 1622 * In adhoc mode cons up a node for the destination. 1623 * Note that we need an additional reference for the 1624 * caller to be consistent with 1625 * ieee80211_find_node_locked. 1626 */ 1627 ni = ieee80211_fakeup_adhoc_node(vap, macaddr); 1628 if (ni != NULL) 1629 (void) ieee80211_ref_node(ni); 1630 } else { 1631 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, macaddr, 1632 "no node, discard frame (%s)", __func__); 1633 vap->iv_stats.is_tx_nonode++; 1634 } 1635 } 1636 return ni; 1637} 1638 1639static void 1640_ieee80211_free_node(struct ieee80211_node *ni) 1641{ 1642 struct ieee80211_node_table *nt = ni->ni_table; 1643 1644 /* 1645 * NB: careful about referencing the vap as it may be 1646 * gone if the last reference was held by a driver. 1647 * We know the com will always be present so it's safe 1648 * to use ni_ic below to reclaim resources. 1649 */ 1650#if 0 1651 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1652 "%s %p<%s> in %s table\n", __func__, ni, 1653 ether_sprintf(ni->ni_macaddr), 1654 nt != NULL ? nt->nt_name : "<gone>"); 1655#endif 1656 if (ni->ni_associd != 0) { 1657 struct ieee80211vap *vap = ni->ni_vap; 1658 if (vap->iv_aid_bitmap != NULL) 1659 IEEE80211_AID_CLR(vap, ni->ni_associd); 1660 } 1661 if (nt != NULL) { 1662 TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1663 LIST_REMOVE(ni, ni_hash); 1664 } 1665 ni->ni_ic->ic_node_free(ni); 1666} 1667 1668void 1669#ifdef IEEE80211_DEBUG_REFCNT 1670ieee80211_free_node_debug(struct ieee80211_node *ni, const char *func, int line) 1671#else 1672ieee80211_free_node(struct ieee80211_node *ni) 1673#endif 1674{ 1675 struct ieee80211_node_table *nt = ni->ni_table; 1676 1677#ifdef IEEE80211_DEBUG_REFCNT 1678 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1679 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni, 1680 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1); 1681#endif 1682 if (nt != NULL) { 1683 IEEE80211_NODE_LOCK(nt); 1684 if (ieee80211_node_dectestref(ni)) { 1685 /* 1686 * Last reference, reclaim state. 1687 */ 1688 _ieee80211_free_node(ni); 1689 } else if (ieee80211_node_refcnt(ni) == 1 && 1690 nt->nt_keyixmap != NULL) { 1691 ieee80211_keyix keyix; 1692 /* 1693 * Check for a last reference in the key mapping table. 1694 */ 1695 keyix = ni->ni_ucastkey.wk_rxkeyix; 1696 if (keyix < nt->nt_keyixmax && 1697 nt->nt_keyixmap[keyix] == ni) { 1698 IEEE80211_DPRINTF(ni->ni_vap, 1699 IEEE80211_MSG_NODE, 1700 "%s: %p<%s> clear key map entry", __func__, 1701 ni, ether_sprintf(ni->ni_macaddr)); 1702 nt->nt_keyixmap[keyix] = NULL; 1703 ieee80211_node_decref(ni); /* XXX needed? */ 1704 _ieee80211_free_node(ni); 1705 } 1706 } 1707 IEEE80211_NODE_UNLOCK(nt); 1708 } else { 1709 if (ieee80211_node_dectestref(ni)) 1710 _ieee80211_free_node(ni); 1711 } 1712} 1713 1714/* 1715 * Reclaim a unicast key and clear any key cache state. 1716 */ 1717int 1718ieee80211_node_delucastkey(struct ieee80211_node *ni) 1719{ 1720 struct ieee80211com *ic = ni->ni_ic; 1721 struct ieee80211_node_table *nt = &ic->ic_sta; 1722 struct ieee80211_node *nikey; 1723 ieee80211_keyix keyix; 1724 int isowned, status; 1725 1726 /* 1727 * NB: We must beware of LOR here; deleting the key 1728 * can cause the crypto layer to block traffic updates 1729 * which can generate a LOR against the node table lock; 1730 * grab it here and stash the key index for our use below. 1731 * 1732 * Must also beware of recursion on the node table lock. 1733 * When called from node_cleanup we may already have 1734 * the node table lock held. Unfortunately there's no 1735 * way to separate out this path so we must do this 1736 * conditionally. 1737 */ 1738 isowned = IEEE80211_NODE_IS_LOCKED(nt); 1739 if (!isowned) 1740 IEEE80211_NODE_LOCK(nt); 1741 nikey = NULL; 1742 status = 1; /* NB: success */ 1743 if (ni->ni_ucastkey.wk_keyix != IEEE80211_KEYIX_NONE) { 1744 keyix = ni->ni_ucastkey.wk_rxkeyix; 1745 status = ieee80211_crypto_delkey(ni->ni_vap, &ni->ni_ucastkey); 1746 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) { 1747 nikey = nt->nt_keyixmap[keyix]; 1748 nt->nt_keyixmap[keyix] = NULL; 1749 } 1750 } 1751 if (!isowned) 1752 IEEE80211_NODE_UNLOCK(nt); 1753 1754 if (nikey != NULL) { 1755 KASSERT(nikey == ni, 1756 ("key map out of sync, ni %p nikey %p", ni, nikey)); 1757 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1758 "%s: delete key map entry %p<%s> refcnt %d\n", 1759 __func__, ni, ether_sprintf(ni->ni_macaddr), 1760 ieee80211_node_refcnt(ni)-1); 1761 ieee80211_free_node(ni); 1762 } 1763 return status; 1764} 1765 1766/* 1767 * Reclaim a node. If this is the last reference count then 1768 * do the normal free work. Otherwise remove it from the node 1769 * table and mark it gone by clearing the back-reference. 1770 */ 1771static void 1772node_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 1773{ 1774 ieee80211_keyix keyix; 1775 1776 IEEE80211_NODE_LOCK_ASSERT(nt); 1777 1778 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1779 "%s: remove %p<%s> from %s table, refcnt %d\n", 1780 __func__, ni, ether_sprintf(ni->ni_macaddr), 1781 nt->nt_name, ieee80211_node_refcnt(ni)-1); 1782 /* 1783 * Clear any entry in the unicast key mapping table. 1784 * We need to do it here so rx lookups don't find it 1785 * in the mapping table even if it's not in the hash 1786 * table. We cannot depend on the mapping table entry 1787 * being cleared because the node may not be free'd. 1788 */ 1789 keyix = ni->ni_ucastkey.wk_rxkeyix; 1790 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax && 1791 nt->nt_keyixmap[keyix] == ni) { 1792 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1793 "%s: %p<%s> clear key map entry %u\n", 1794 __func__, ni, ether_sprintf(ni->ni_macaddr), keyix); 1795 nt->nt_keyixmap[keyix] = NULL; 1796 ieee80211_node_decref(ni); /* NB: don't need free */ 1797 } 1798 if (!ieee80211_node_dectestref(ni)) { 1799 /* 1800 * Other references are present, just remove the 1801 * node from the table so it cannot be found. When 1802 * the references are dropped storage will be 1803 * reclaimed. 1804 */ 1805 TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1806 LIST_REMOVE(ni, ni_hash); 1807 ni->ni_table = NULL; /* clear reference */ 1808 } else 1809 _ieee80211_free_node(ni); 1810} 1811 1812/* 1813 * Node table support. 1814 */ 1815 1816static void 1817ieee80211_node_table_init(struct ieee80211com *ic, 1818 struct ieee80211_node_table *nt, 1819 const char *name, int inact, int keyixmax) 1820{ 1821 struct ifnet *ifp = ic->ic_ifp; 1822 1823 nt->nt_ic = ic; 1824 IEEE80211_NODE_LOCK_INIT(nt, ifp->if_xname); 1825 IEEE80211_NODE_ITERATE_LOCK_INIT(nt, ifp->if_xname); 1826 TAILQ_INIT(&nt->nt_node); 1827 nt->nt_name = name; 1828 nt->nt_scangen = 1; 1829 nt->nt_inact_init = inact; 1830 nt->nt_keyixmax = keyixmax; 1831 if (nt->nt_keyixmax > 0) { 1832 nt->nt_keyixmap = (struct ieee80211_node **) malloc( 1833 keyixmax * sizeof(struct ieee80211_node *), 1834 M_80211_NODE, M_NOWAIT | M_ZERO); 1835 if (nt->nt_keyixmap == NULL) 1836 if_printf(ic->ic_ifp, 1837 "Cannot allocate key index map with %u entries\n", 1838 keyixmax); 1839 } else 1840 nt->nt_keyixmap = NULL; 1841} 1842 1843static void 1844ieee80211_node_table_reset(struct ieee80211_node_table *nt, 1845 struct ieee80211vap *match) 1846{ 1847 struct ieee80211_node *ni, *next; 1848 1849 IEEE80211_NODE_LOCK(nt); 1850 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) { 1851 if (match != NULL && ni->ni_vap != match) 1852 continue; 1853 /* XXX can this happen? if so need's work */ 1854 if (ni->ni_associd != 0) { 1855 struct ieee80211vap *vap = ni->ni_vap; 1856 1857 if (vap->iv_auth->ia_node_leave != NULL) 1858 vap->iv_auth->ia_node_leave(ni); 1859 if (vap->iv_aid_bitmap != NULL) 1860 IEEE80211_AID_CLR(vap, ni->ni_associd); 1861 } 1862 ni->ni_wdsvap = NULL; /* clear reference */ 1863 node_reclaim(nt, ni); 1864 } 1865 if (match != NULL && match->iv_opmode == IEEE80211_M_WDS) { 1866 /* 1867 * Make a separate pass to clear references to this vap 1868 * held by DWDS entries. They will not be matched above 1869 * because ni_vap will point to the ap vap but we still 1870 * need to clear ni_wdsvap when the WDS vap is destroyed 1871 * and/or reset. 1872 */ 1873 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) 1874 if (ni->ni_wdsvap == match) 1875 ni->ni_wdsvap = NULL; 1876 } 1877 IEEE80211_NODE_UNLOCK(nt); 1878} 1879 1880static void 1881ieee80211_node_table_cleanup(struct ieee80211_node_table *nt) 1882{ 1883 ieee80211_node_table_reset(nt, NULL); 1884 if (nt->nt_keyixmap != NULL) { 1885#ifdef DIAGNOSTIC 1886 /* XXX verify all entries are NULL */ 1887 int i; 1888 for (i = 0; i < nt->nt_keyixmax; i++) 1889 if (nt->nt_keyixmap[i] != NULL) 1890 printf("%s: %s[%u] still active\n", __func__, 1891 nt->nt_name, i); 1892#endif 1893 free(nt->nt_keyixmap, M_80211_NODE); 1894 nt->nt_keyixmap = NULL; 1895 } 1896 IEEE80211_NODE_ITERATE_LOCK_DESTROY(nt); 1897 IEEE80211_NODE_LOCK_DESTROY(nt); 1898} 1899 1900/* 1901 * Timeout inactive stations and do related housekeeping. 1902 * Note that we cannot hold the node lock while sending a 1903 * frame as this would lead to a LOR. Instead we use a 1904 * generation number to mark nodes that we've scanned and 1905 * drop the lock and restart a scan if we have to time out 1906 * a node. Since we are single-threaded by virtue of 1907 * controlling the inactivity timer we can be sure this will 1908 * process each node only once. 1909 */ 1910static void 1911ieee80211_timeout_stations(struct ieee80211com *ic) 1912{ 1913 struct ieee80211_node_table *nt = &ic->ic_sta; 1914 struct ieee80211vap *vap; 1915 struct ieee80211_node *ni; 1916 int gen = 0; 1917 1918 IEEE80211_NODE_ITERATE_LOCK(nt); 1919 gen = ++nt->nt_scangen; 1920restart: 1921 IEEE80211_NODE_LOCK(nt); 1922 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 1923 if (ni->ni_scangen == gen) /* previously handled */ 1924 continue; 1925 ni->ni_scangen = gen; 1926 /* 1927 * Ignore entries for which have yet to receive an 1928 * authentication frame. These are transient and 1929 * will be reclaimed when the last reference to them 1930 * goes away (when frame xmits complete). 1931 */ 1932 vap = ni->ni_vap; 1933 /* 1934 * Only process stations when in RUN state. This 1935 * insures, for example, that we don't timeout an 1936 * inactive station during CAC. Note that CSA state 1937 * is actually handled in ieee80211_node_timeout as 1938 * it applies to more than timeout processing. 1939 */ 1940 if (vap->iv_state != IEEE80211_S_RUN) 1941 continue; 1942 /* XXX can vap be NULL? */ 1943 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 1944 vap->iv_opmode == IEEE80211_M_STA) && 1945 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 1946 continue; 1947 /* 1948 * Free fragment if not needed anymore 1949 * (last fragment older than 1s). 1950 * XXX doesn't belong here, move to node_age 1951 */ 1952 if (ni->ni_rxfrag[0] != NULL && 1953 ticks > ni->ni_rxfragstamp + hz) { 1954 m_freem(ni->ni_rxfrag[0]); 1955 ni->ni_rxfrag[0] = NULL; 1956 } 1957 if (ni->ni_inact > 0) { 1958 ni->ni_inact--; 1959 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 1960 "%s: inact %u inact_reload %u nrates %u", 1961 __func__, ni->ni_inact, ni->ni_inact_reload, 1962 ni->ni_rates.rs_nrates); 1963 } 1964 /* 1965 * Special case ourself; we may be idle for extended periods 1966 * of time and regardless reclaiming our state is wrong. 1967 * XXX run ic_node_age 1968 */ 1969 if (ni == vap->iv_bss) 1970 continue; 1971 if (ni->ni_associd != 0 || 1972 (vap->iv_opmode == IEEE80211_M_IBSS || 1973 vap->iv_opmode == IEEE80211_M_AHDEMO)) { 1974 /* 1975 * Age/drain resources held by the station. 1976 */ 1977 ic->ic_node_age(ni); 1978 /* 1979 * Probe the station before time it out. We 1980 * send a null data frame which may not be 1981 * universally supported by drivers (need it 1982 * for ps-poll support so it should be...). 1983 * 1984 * XXX don't probe the station unless we've 1985 * received a frame from them (and have 1986 * some idea of the rates they are capable 1987 * of); this will get fixed more properly 1988 * soon with better handling of the rate set. 1989 */ 1990 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 1991 (0 < ni->ni_inact && 1992 ni->ni_inact <= vap->iv_inact_probe) && 1993 ni->ni_rates.rs_nrates != 0) { 1994 IEEE80211_NOTE(vap, 1995 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, 1996 ni, "%s", 1997 "probe station due to inactivity"); 1998 /* 1999 * Grab a reference before unlocking the table 2000 * so the node cannot be reclaimed before we 2001 * send the frame. ieee80211_send_nulldata 2002 * understands we've done this and reclaims the 2003 * ref for us as needed. 2004 */ 2005 ieee80211_ref_node(ni); 2006 IEEE80211_NODE_UNLOCK(nt); 2007 ieee80211_send_nulldata(ni); 2008 /* XXX stat? */ 2009 goto restart; 2010 } 2011 } 2012 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 2013 ni->ni_inact <= 0) { 2014 IEEE80211_NOTE(vap, 2015 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, ni, 2016 "station timed out due to inactivity " 2017 "(refcnt %u)", ieee80211_node_refcnt(ni)); 2018 /* 2019 * Send a deauthenticate frame and drop the station. 2020 * This is somewhat complicated due to reference counts 2021 * and locking. At this point a station will typically 2022 * have a reference count of 1. ieee80211_node_leave 2023 * will do a "free" of the node which will drop the 2024 * reference count. But in the meantime a reference 2025 * wil be held by the deauth frame. The actual reclaim 2026 * of the node will happen either after the tx is 2027 * completed or by ieee80211_node_leave. 2028 * 2029 * Separately we must drop the node lock before sending 2030 * in case the driver takes a lock, as this can result 2031 * in a LOR between the node lock and the driver lock. 2032 */ 2033 ieee80211_ref_node(ni); 2034 IEEE80211_NODE_UNLOCK(nt); 2035 if (ni->ni_associd != 0) { 2036 IEEE80211_SEND_MGMT(ni, 2037 IEEE80211_FC0_SUBTYPE_DEAUTH, 2038 IEEE80211_REASON_AUTH_EXPIRE); 2039 } 2040 ieee80211_node_leave(ni); 2041 ieee80211_free_node(ni); 2042 vap->iv_stats.is_node_timeout++; 2043 goto restart; 2044 } 2045 } 2046 IEEE80211_NODE_UNLOCK(nt); 2047 2048 IEEE80211_NODE_ITERATE_UNLOCK(nt); 2049} 2050 2051/* 2052 * Aggressively reclaim resources. This should be used 2053 * only in a critical situation to reclaim mbuf resources. 2054 */ 2055void 2056ieee80211_drain(struct ieee80211com *ic) 2057{ 2058 struct ieee80211_node_table *nt = &ic->ic_sta; 2059 struct ieee80211vap *vap; 2060 struct ieee80211_node *ni; 2061 2062 IEEE80211_NODE_LOCK(nt); 2063 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2064 /* 2065 * Ignore entries for which have yet to receive an 2066 * authentication frame. These are transient and 2067 * will be reclaimed when the last reference to them 2068 * goes away (when frame xmits complete). 2069 */ 2070 vap = ni->ni_vap; 2071 /* 2072 * Only process stations when in RUN state. This 2073 * insures, for example, that we don't timeout an 2074 * inactive station during CAC. Note that CSA state 2075 * is actually handled in ieee80211_node_timeout as 2076 * it applies to more than timeout processing. 2077 */ 2078 if (vap->iv_state != IEEE80211_S_RUN) 2079 continue; 2080 /* XXX can vap be NULL? */ 2081 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 2082 vap->iv_opmode == IEEE80211_M_STA) && 2083 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 2084 continue; 2085 /* 2086 * Free fragments. 2087 * XXX doesn't belong here, move to node_drain 2088 */ 2089 if (ni->ni_rxfrag[0] != NULL) { 2090 m_freem(ni->ni_rxfrag[0]); 2091 ni->ni_rxfrag[0] = NULL; 2092 } 2093 /* 2094 * Drain resources held by the station. 2095 */ 2096 ic->ic_node_drain(ni); 2097 } 2098 IEEE80211_NODE_UNLOCK(nt); 2099} 2100 2101/* 2102 * Per-ieee80211com inactivity timer callback. 2103 */ 2104void 2105ieee80211_node_timeout(void *arg) 2106{ 2107 struct ieee80211com *ic = arg; 2108 2109 /* 2110 * Defer timeout processing if a channel switch is pending. 2111 * We typically need to be mute so not doing things that 2112 * might generate frames is good to handle in one place. 2113 * Supressing the station timeout processing may extend the 2114 * lifetime of inactive stations (by not decrementing their 2115 * idle counters) but this should be ok unless the CSA is 2116 * active for an unusually long time. 2117 */ 2118 if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) { 2119 ieee80211_scan_timeout(ic); 2120 ieee80211_timeout_stations(ic); 2121 ieee80211_ageq_age(&ic->ic_stageq, IEEE80211_INACT_WAIT); 2122 2123 IEEE80211_LOCK(ic); 2124 ieee80211_erp_timeout(ic); 2125 ieee80211_ht_timeout(ic); 2126 IEEE80211_UNLOCK(ic); 2127 } 2128 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, 2129 ieee80211_node_timeout, ic); 2130} 2131 2132void 2133ieee80211_iterate_nodes(struct ieee80211_node_table *nt, 2134 ieee80211_iter_func *f, void *arg) 2135{ 2136 struct ieee80211_node *ni; 2137 u_int gen; 2138 2139 IEEE80211_NODE_ITERATE_LOCK(nt); 2140 gen = ++nt->nt_scangen; 2141restart: 2142 IEEE80211_NODE_LOCK(nt); 2143 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2144 if (ni->ni_scangen != gen) { 2145 ni->ni_scangen = gen; 2146 (void) ieee80211_ref_node(ni); 2147 IEEE80211_NODE_UNLOCK(nt); 2148 (*f)(arg, ni); 2149 ieee80211_free_node(ni); 2150 goto restart; 2151 } 2152 } 2153 IEEE80211_NODE_UNLOCK(nt); 2154 2155 IEEE80211_NODE_ITERATE_UNLOCK(nt); 2156} 2157 2158void 2159ieee80211_dump_node(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 2160{ 2161 printf("0x%p: mac %s refcnt %d\n", ni, 2162 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)); 2163 printf("\tscangen %u authmode %u flags 0x%x\n", 2164 ni->ni_scangen, ni->ni_authmode, ni->ni_flags); 2165 printf("\tassocid 0x%x txpower %u vlan %u\n", 2166 ni->ni_associd, ni->ni_txpower, ni->ni_vlan); 2167 printf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n", 2168 ni->ni_txseqs[IEEE80211_NONQOS_TID], 2169 ni->ni_rxseqs[IEEE80211_NONQOS_TID] >> IEEE80211_SEQ_SEQ_SHIFT, 2170 ni->ni_rxseqs[IEEE80211_NONQOS_TID] & IEEE80211_SEQ_FRAG_MASK, 2171 ni->ni_rxfragstamp); 2172 printf("\trssi %d noise %d intval %u capinfo 0x%x\n", 2173 node_getrssi(ni), ni->ni_noise, 2174 ni->ni_intval, ni->ni_capinfo); 2175 printf("\tbssid %s essid \"%.*s\" channel %u:0x%x\n", 2176 ether_sprintf(ni->ni_bssid), 2177 ni->ni_esslen, ni->ni_essid, 2178 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags); 2179 printf("\tinact %u inact_reload %u txrate %u\n", 2180 ni->ni_inact, ni->ni_inact_reload, ni->ni_txrate); 2181 printf("\thtcap %x htparam %x htctlchan %u ht2ndchan %u\n", 2182 ni->ni_htcap, ni->ni_htparam, 2183 ni->ni_htctlchan, ni->ni_ht2ndchan); 2184 printf("\thtopmode %x htstbc %x chw %u\n", 2185 ni->ni_htopmode, ni->ni_htstbc, ni->ni_chw); 2186} 2187 2188void 2189ieee80211_dump_nodes(struct ieee80211_node_table *nt) 2190{ 2191 ieee80211_iterate_nodes(nt, 2192 (ieee80211_iter_func *) ieee80211_dump_node, nt); 2193} 2194 2195static void 2196ieee80211_notify_erp_locked(struct ieee80211com *ic) 2197{ 2198 struct ieee80211vap *vap; 2199 2200 IEEE80211_LOCK_ASSERT(ic); 2201 2202 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 2203 if (vap->iv_opmode == IEEE80211_M_HOSTAP) 2204 ieee80211_beacon_notify(vap, IEEE80211_BEACON_ERP); 2205} 2206 2207void 2208ieee80211_notify_erp(struct ieee80211com *ic) 2209{ 2210 IEEE80211_LOCK(ic); 2211 ieee80211_notify_erp_locked(ic); 2212 IEEE80211_UNLOCK(ic); 2213} 2214 2215/* 2216 * Handle a station joining an 11g network. 2217 */ 2218static void 2219ieee80211_node_join_11g(struct ieee80211_node *ni) 2220{ 2221 struct ieee80211com *ic = ni->ni_ic; 2222 2223 IEEE80211_LOCK_ASSERT(ic); 2224 2225 /* 2226 * Station isn't capable of short slot time. Bump 2227 * the count of long slot time stations and disable 2228 * use of short slot time. Note that the actual switch 2229 * over to long slot time use may not occur until the 2230 * next beacon transmission (per sec. 7.3.1.4 of 11g). 2231 */ 2232 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2233 ic->ic_longslotsta++; 2234 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2235 "station needs long slot time, count %d", 2236 ic->ic_longslotsta); 2237 /* XXX vap's w/ conflicting needs won't work */ 2238 if (!IEEE80211_IS_CHAN_108G(ic->ic_bsschan)) { 2239 /* 2240 * Don't force slot time when switched to turbo 2241 * mode as non-ERP stations won't be present; this 2242 * need only be done when on the normal G channel. 2243 */ 2244 ieee80211_set_shortslottime(ic, 0); 2245 } 2246 } 2247 /* 2248 * If the new station is not an ERP station 2249 * then bump the counter and enable protection 2250 * if configured. 2251 */ 2252 if (!ieee80211_iserp_rateset(&ni->ni_rates)) { 2253 ic->ic_nonerpsta++; 2254 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2255 "station is !ERP, %d non-ERP stations associated", 2256 ic->ic_nonerpsta); 2257 /* 2258 * If station does not support short preamble 2259 * then we must enable use of Barker preamble. 2260 */ 2261 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) { 2262 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2263 "%s", "station needs long preamble"); 2264 ic->ic_flags |= IEEE80211_F_USEBARKER; 2265 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; 2266 } 2267 /* 2268 * If protection is configured and this is the first 2269 * indication we should use protection, enable it. 2270 */ 2271 if (ic->ic_protmode != IEEE80211_PROT_NONE && 2272 ic->ic_nonerpsta == 1 && 2273 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2274 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2275 "%s: enable use of protection\n", __func__); 2276 ic->ic_flags |= IEEE80211_F_USEPROT; 2277 ieee80211_notify_erp_locked(ic); 2278 } 2279 } else 2280 ni->ni_flags |= IEEE80211_NODE_ERP; 2281} 2282 2283void 2284ieee80211_node_join(struct ieee80211_node *ni, int resp) 2285{ 2286 struct ieee80211com *ic = ni->ni_ic; 2287 struct ieee80211vap *vap = ni->ni_vap; 2288 int newassoc; 2289 2290 if (ni->ni_associd == 0) { 2291 uint16_t aid; 2292 2293 KASSERT(vap->iv_aid_bitmap != NULL, ("no aid bitmap")); 2294 /* 2295 * It would be good to search the bitmap 2296 * more efficiently, but this will do for now. 2297 */ 2298 for (aid = 1; aid < vap->iv_max_aid; aid++) { 2299 if (!IEEE80211_AID_ISSET(vap, aid)) 2300 break; 2301 } 2302 if (aid >= vap->iv_max_aid) { 2303 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_TOOMANY); 2304 ieee80211_node_leave(ni); 2305 return; 2306 } 2307 ni->ni_associd = aid | 0xc000; 2308 ni->ni_jointime = time_uptime; 2309 IEEE80211_LOCK(ic); 2310 IEEE80211_AID_SET(vap, ni->ni_associd); 2311 vap->iv_sta_assoc++; 2312 ic->ic_sta_assoc++; 2313 2314 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2315 ieee80211_ht_node_join(ni); 2316 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2317 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2318 ieee80211_node_join_11g(ni); 2319 IEEE80211_UNLOCK(ic); 2320 2321 newassoc = 1; 2322 } else 2323 newassoc = 0; 2324 2325 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2326 "station associated at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s", 2327 IEEE80211_NODE_AID(ni), 2328 ic->ic_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long", 2329 ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long", 2330 ic->ic_flags & IEEE80211_F_USEPROT ? ", protection" : "", 2331 ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "", 2332 ni->ni_flags & IEEE80211_NODE_HT ? 2333 (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "", 2334 ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "", 2335 ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" : 2336 ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "", 2337 ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "", 2338 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ? 2339 ", fast-frames" : "", 2340 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ? 2341 ", turbo" : "" 2342 ); 2343 2344 ieee80211_node_setuptxparms(ni); 2345 ieee80211_ratectl_node_init(ni); 2346 /* give driver a chance to setup state like ni_txrate */ 2347 if (ic->ic_newassoc != NULL) 2348 ic->ic_newassoc(ni, newassoc); 2349 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_SUCCESS); 2350 /* tell the authenticator about new station */ 2351 if (vap->iv_auth->ia_node_join != NULL) 2352 vap->iv_auth->ia_node_join(ni); 2353 ieee80211_notify_node_join(ni, 2354 resp == IEEE80211_FC0_SUBTYPE_ASSOC_RESP); 2355} 2356 2357static void 2358disable_protection(struct ieee80211com *ic) 2359{ 2360 KASSERT(ic->ic_nonerpsta == 0 && 2361 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0, 2362 ("%d non ERP stations, flags 0x%x", ic->ic_nonerpsta, 2363 ic->ic_flags_ext)); 2364 2365 ic->ic_flags &= ~IEEE80211_F_USEPROT; 2366 /* XXX verify mode? */ 2367 if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) { 2368 ic->ic_flags |= IEEE80211_F_SHPREAMBLE; 2369 ic->ic_flags &= ~IEEE80211_F_USEBARKER; 2370 } 2371 ieee80211_notify_erp_locked(ic); 2372} 2373 2374/* 2375 * Handle a station leaving an 11g network. 2376 */ 2377static void 2378ieee80211_node_leave_11g(struct ieee80211_node *ni) 2379{ 2380 struct ieee80211com *ic = ni->ni_ic; 2381 2382 IEEE80211_LOCK_ASSERT(ic); 2383 2384 KASSERT(IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan), 2385 ("not in 11g, bss %u:0x%x", ic->ic_bsschan->ic_freq, 2386 ic->ic_bsschan->ic_flags)); 2387 2388 /* 2389 * If a long slot station do the slot time bookkeeping. 2390 */ 2391 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2392 KASSERT(ic->ic_longslotsta > 0, 2393 ("bogus long slot station count %d", ic->ic_longslotsta)); 2394 ic->ic_longslotsta--; 2395 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2396 "long slot time station leaves, count now %d", 2397 ic->ic_longslotsta); 2398 if (ic->ic_longslotsta == 0) { 2399 /* 2400 * Re-enable use of short slot time if supported 2401 * and not operating in IBSS mode (per spec). 2402 */ 2403 if ((ic->ic_caps & IEEE80211_C_SHSLOT) && 2404 ic->ic_opmode != IEEE80211_M_IBSS) { 2405 IEEE80211_DPRINTF(ni->ni_vap, 2406 IEEE80211_MSG_ASSOC, 2407 "%s: re-enable use of short slot time\n", 2408 __func__); 2409 ieee80211_set_shortslottime(ic, 1); 2410 } 2411 } 2412 } 2413 /* 2414 * If a non-ERP station do the protection-related bookkeeping. 2415 */ 2416 if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) { 2417 KASSERT(ic->ic_nonerpsta > 0, 2418 ("bogus non-ERP station count %d", ic->ic_nonerpsta)); 2419 ic->ic_nonerpsta--; 2420 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2421 "non-ERP station leaves, count now %d%s", ic->ic_nonerpsta, 2422 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) ? 2423 " (non-ERP sta present)" : ""); 2424 if (ic->ic_nonerpsta == 0 && 2425 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2426 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2427 "%s: disable use of protection\n", __func__); 2428 disable_protection(ic); 2429 } 2430 } 2431} 2432 2433/* 2434 * Time out presence of an overlapping bss with non-ERP 2435 * stations. When operating in hostap mode we listen for 2436 * beacons from other stations and if we identify a non-ERP 2437 * station is present we enable protection. To identify 2438 * when all non-ERP stations are gone we time out this 2439 * condition. 2440 */ 2441static void 2442ieee80211_erp_timeout(struct ieee80211com *ic) 2443{ 2444 2445 IEEE80211_LOCK_ASSERT(ic); 2446 2447 if ((ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) && 2448 time_after(ticks, ic->ic_lastnonerp + IEEE80211_NONERP_PRESENT_AGE)) { 2449#if 0 2450 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni, 2451 "%s", "age out non-ERP sta present on channel"); 2452#endif 2453 ic->ic_flags_ext &= ~IEEE80211_FEXT_NONERP_PR; 2454 if (ic->ic_nonerpsta == 0) 2455 disable_protection(ic); 2456 } 2457} 2458 2459/* 2460 * Handle bookkeeping for station deauthentication/disassociation 2461 * when operating as an ap. 2462 */ 2463void 2464ieee80211_node_leave(struct ieee80211_node *ni) 2465{ 2466 struct ieee80211com *ic = ni->ni_ic; 2467 struct ieee80211vap *vap = ni->ni_vap; 2468 struct ieee80211_node_table *nt = ni->ni_table; 2469 2470 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2471 "station with aid %d leaves", IEEE80211_NODE_AID(ni)); 2472 2473 KASSERT(vap->iv_opmode != IEEE80211_M_STA, 2474 ("unexpected operating mode %u", vap->iv_opmode)); 2475 /* 2476 * If node wasn't previously associated all 2477 * we need to do is reclaim the reference. 2478 */ 2479 /* XXX ibss mode bypasses 11g and notification */ 2480 if (ni->ni_associd == 0) 2481 goto done; 2482 /* 2483 * Tell the authenticator the station is leaving. 2484 * Note that we must do this before yanking the 2485 * association id as the authenticator uses the 2486 * associd to locate it's state block. 2487 */ 2488 if (vap->iv_auth->ia_node_leave != NULL) 2489 vap->iv_auth->ia_node_leave(ni); 2490 2491 IEEE80211_LOCK(ic); 2492 IEEE80211_AID_CLR(vap, ni->ni_associd); 2493 ni->ni_associd = 0; 2494 vap->iv_sta_assoc--; 2495 ic->ic_sta_assoc--; 2496 2497 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2498 ieee80211_ht_node_leave(ni); 2499 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2500 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2501 ieee80211_node_leave_11g(ni); 2502 IEEE80211_UNLOCK(ic); 2503 /* 2504 * Cleanup station state. In particular clear various 2505 * state that might otherwise be reused if the node 2506 * is reused before the reference count goes to zero 2507 * (and memory is reclaimed). 2508 */ 2509 ieee80211_sta_leave(ni); 2510done: 2511 /* 2512 * Remove the node from any table it's recorded in and 2513 * drop the caller's reference. Removal from the table 2514 * is important to insure the node is not reprocessed 2515 * for inactivity. 2516 */ 2517 if (nt != NULL) { 2518 IEEE80211_NODE_LOCK(nt); 2519 node_reclaim(nt, ni); 2520 IEEE80211_NODE_UNLOCK(nt); 2521 } else 2522 ieee80211_free_node(ni); 2523} 2524 2525struct rssiinfo { 2526 struct ieee80211vap *vap; 2527 int rssi_samples; 2528 uint32_t rssi_total; 2529}; 2530 2531static void 2532get_hostap_rssi(void *arg, struct ieee80211_node *ni) 2533{ 2534 struct rssiinfo *info = arg; 2535 struct ieee80211vap *vap = ni->ni_vap; 2536 int8_t rssi; 2537 2538 if (info->vap != vap) 2539 return; 2540 /* only associated stations */ 2541 if (ni->ni_associd == 0) 2542 return; 2543 rssi = vap->iv_ic->ic_node_getrssi(ni); 2544 if (rssi != 0) { 2545 info->rssi_samples++; 2546 info->rssi_total += rssi; 2547 } 2548} 2549 2550static void 2551get_adhoc_rssi(void *arg, struct ieee80211_node *ni) 2552{ 2553 struct rssiinfo *info = arg; 2554 struct ieee80211vap *vap = ni->ni_vap; 2555 int8_t rssi; 2556 2557 if (info->vap != vap) 2558 return; 2559 /* only neighbors */ 2560 /* XXX check bssid */ 2561 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 2562 return; 2563 rssi = vap->iv_ic->ic_node_getrssi(ni); 2564 if (rssi != 0) { 2565 info->rssi_samples++; 2566 info->rssi_total += rssi; 2567 } 2568} 2569 2570#ifdef IEEE80211_SUPPORT_MESH 2571static void 2572get_mesh_rssi(void *arg, struct ieee80211_node *ni) 2573{ 2574 struct rssiinfo *info = arg; 2575 struct ieee80211vap *vap = ni->ni_vap; 2576 int8_t rssi; 2577 2578 if (info->vap != vap) 2579 return; 2580 /* only neighbors that peered successfully */ 2581 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) 2582 return; 2583 rssi = vap->iv_ic->ic_node_getrssi(ni); 2584 if (rssi != 0) { 2585 info->rssi_samples++; 2586 info->rssi_total += rssi; 2587 } 2588} 2589#endif /* IEEE80211_SUPPORT_MESH */ 2590 2591int8_t 2592ieee80211_getrssi(struct ieee80211vap *vap) 2593{ 2594#define NZ(x) ((x) == 0 ? 1 : (x)) 2595 struct ieee80211com *ic = vap->iv_ic; 2596 struct rssiinfo info; 2597 2598 info.rssi_total = 0; 2599 info.rssi_samples = 0; 2600 info.vap = vap; 2601 switch (vap->iv_opmode) { 2602 case IEEE80211_M_IBSS: /* average of all ibss neighbors */ 2603 case IEEE80211_M_AHDEMO: /* average of all neighbors */ 2604 ieee80211_iterate_nodes(&ic->ic_sta, get_adhoc_rssi, &info); 2605 break; 2606 case IEEE80211_M_HOSTAP: /* average of all associated stations */ 2607 ieee80211_iterate_nodes(&ic->ic_sta, get_hostap_rssi, &info); 2608 break; 2609#ifdef IEEE80211_SUPPORT_MESH 2610 case IEEE80211_M_MBSS: /* average of all mesh neighbors */ 2611 ieee80211_iterate_nodes(&ic->ic_sta, get_mesh_rssi, &info); 2612 break; 2613#endif 2614 case IEEE80211_M_MONITOR: /* XXX */ 2615 case IEEE80211_M_STA: /* use stats from associated ap */ 2616 default: 2617 if (vap->iv_bss != NULL) 2618 info.rssi_total = ic->ic_node_getrssi(vap->iv_bss); 2619 info.rssi_samples = 1; 2620 break; 2621 } 2622 return info.rssi_total / NZ(info.rssi_samples); 2623#undef NZ 2624} 2625 2626void 2627ieee80211_getsignal(struct ieee80211vap *vap, int8_t *rssi, int8_t *noise) 2628{ 2629 2630 if (vap->iv_bss == NULL) /* NB: shouldn't happen */ 2631 return; 2632 vap->iv_ic->ic_node_getsignal(vap->iv_bss, rssi, noise); 2633 /* for non-station mode return avg'd rssi accounting */ 2634 if (vap->iv_opmode != IEEE80211_M_STA) 2635 *rssi = ieee80211_getrssi(vap); 2636} 2637