ieee80211_node.c revision 314667
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: stable/10/sys/net80211/ieee80211_node.c 314667 2017-03-04 13:03:31Z avg $"); 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, 1); 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 688void 689ieee80211_update_chw(struct ieee80211com *ic) 690{ 691 692 ieee80211_setupcurchan(ic, ic->ic_curchan); 693 ieee80211_runtask(ic, &ic->ic_chw_task); 694} 695 696/* 697 * Join the specified IBSS/BSS network. The node is assumed to 698 * be passed in with a held reference. 699 */ 700static int 701ieee80211_sta_join1(struct ieee80211_node *selbs) 702{ 703 struct ieee80211vap *vap = selbs->ni_vap; 704 struct ieee80211com *ic = selbs->ni_ic; 705 struct ieee80211_node *obss; 706 int canreassoc; 707 708 /* 709 * Committed to selbs, setup state. 710 */ 711 obss = vap->iv_bss; 712 /* 713 * Check if old+new node have the same address in which 714 * case we can reassociate when operating in sta mode. 715 */ 716 canreassoc = (obss != NULL && 717 vap->iv_state == IEEE80211_S_RUN && 718 IEEE80211_ADDR_EQ(obss->ni_macaddr, selbs->ni_macaddr)); 719 vap->iv_bss = selbs; /* NB: caller assumed to bump refcnt */ 720 if (obss != NULL) { 721 copy_bss(selbs, obss); 722 ieee80211_node_decref(obss); /* iv_bss reference */ 723 ieee80211_free_node(obss); /* station table reference */ 724 obss = NULL; /* NB: guard against later use */ 725 } 726 727 /* 728 * Delete unusable rates; we've already checked 729 * that the negotiated rate set is acceptable. 730 */ 731 ieee80211_fix_rate(vap->iv_bss, &vap->iv_bss->ni_rates, 732 IEEE80211_F_DODEL | IEEE80211_F_JOIN); 733 734 ieee80211_setcurchan(ic, selbs->ni_chan); 735 /* 736 * Set the erp state (mostly the slot time) to deal with 737 * the auto-select case; this should be redundant if the 738 * mode is locked. 739 */ 740 ieee80211_reset_erp(ic); 741 ieee80211_wme_initparams(vap); 742 743 if (vap->iv_opmode == IEEE80211_M_STA) { 744 if (canreassoc) { 745 /* Reassociate */ 746 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 1); 747 } else { 748 /* 749 * Act as if we received a DEAUTH frame in case we 750 * are invoked from the RUN state. This will cause 751 * us to try to re-authenticate if we are operating 752 * as a station. 753 */ 754 ieee80211_new_state(vap, IEEE80211_S_AUTH, 755 IEEE80211_FC0_SUBTYPE_DEAUTH); 756 } 757 } else 758 ieee80211_new_state(vap, IEEE80211_S_RUN, -1); 759 return 1; 760} 761 762int 763ieee80211_sta_join(struct ieee80211vap *vap, struct ieee80211_channel *chan, 764 const struct ieee80211_scan_entry *se) 765{ 766 struct ieee80211com *ic = vap->iv_ic; 767 struct ieee80211_node *ni; 768 769 ni = ieee80211_alloc_node(&ic->ic_sta, vap, se->se_macaddr); 770 if (ni == NULL) { 771 /* XXX msg */ 772 return 0; 773 } 774 775 /* 776 * Expand scan state into node's format. 777 * XXX may not need all this stuff 778 */ 779 IEEE80211_ADDR_COPY(ni->ni_bssid, se->se_bssid); 780 ni->ni_esslen = se->se_ssid[1]; 781 memcpy(ni->ni_essid, se->se_ssid+2, ni->ni_esslen); 782 ni->ni_tstamp.tsf = se->se_tstamp.tsf; 783 ni->ni_intval = se->se_intval; 784 ni->ni_capinfo = se->se_capinfo; 785 ni->ni_chan = chan; 786 ni->ni_timoff = se->se_timoff; 787 ni->ni_fhdwell = se->se_fhdwell; 788 ni->ni_fhindex = se->se_fhindex; 789 ni->ni_erp = se->se_erp; 790 IEEE80211_RSSI_LPF(ni->ni_avgrssi, se->se_rssi); 791 ni->ni_noise = se->se_noise; 792 if (vap->iv_opmode == IEEE80211_M_STA) { 793 /* NB: only infrastructure mode requires an associd */ 794 ni->ni_flags |= IEEE80211_NODE_ASSOCID; 795 } 796 797 if (ieee80211_ies_init(&ni->ni_ies, se->se_ies.data, se->se_ies.len)) { 798 ieee80211_ies_expand(&ni->ni_ies); 799#ifdef IEEE80211_SUPPORT_SUPERG 800 if (ni->ni_ies.ath_ie != NULL) 801 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 802#endif 803 if (ni->ni_ies.htcap_ie != NULL) 804 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie); 805 if (ni->ni_ies.htinfo_ie != NULL) 806 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie); 807#ifdef IEEE80211_SUPPORT_MESH 808 if (ni->ni_ies.meshid_ie != NULL) 809 ieee80211_parse_meshid(ni, ni->ni_ies.meshid_ie); 810#endif 811#ifdef IEEE80211_SUPPORT_TDMA 812 if (ni->ni_ies.tdma_ie != NULL) 813 ieee80211_parse_tdma(ni, ni->ni_ies.tdma_ie); 814#endif 815 } 816 817 vap->iv_dtim_period = se->se_dtimperiod; 818 vap->iv_dtim_count = 0; 819 820 /* NB: must be after ni_chan is setup */ 821 ieee80211_setup_rates(ni, se->se_rates, se->se_xrates, 822 IEEE80211_F_DOSORT); 823 if (ieee80211_iserp_rateset(&ni->ni_rates)) 824 ni->ni_flags |= IEEE80211_NODE_ERP; 825 826 /* 827 * Setup HT state for this node if it's available, otherwise 828 * non-STA modes won't pick this state up. 829 * 830 * For IBSS and related modes that don't go through an 831 * association request/response, the only appropriate place 832 * to setup the HT state is here. 833 */ 834 if (ni->ni_ies.htinfo_ie != NULL && 835 ni->ni_ies.htcap_ie != NULL && 836 vap->iv_flags_ht & IEEE80211_FHT_HT) { 837 ieee80211_ht_node_init(ni); 838 ieee80211_ht_updateparams(ni, 839 ni->ni_ies.htcap_ie, 840 ni->ni_ies.htinfo_ie); 841 ieee80211_setup_htrates(ni, ni->ni_ies.htcap_ie, 842 IEEE80211_F_JOIN | IEEE80211_F_DOBRS); 843 ieee80211_setup_basic_htrates(ni, ni->ni_ies.htinfo_ie); 844 } 845 /* XXX else check for ath FF? */ 846 /* XXX QoS? Difficult given that WME config is specific to a master */ 847 848 ieee80211_node_setuptxparms(ni); 849 ieee80211_ratectl_node_init(ni); 850 851 return ieee80211_sta_join1(ieee80211_ref_node(ni)); 852} 853 854/* 855 * Leave the specified IBSS/BSS network. The node is assumed to 856 * be passed in with a held reference. 857 */ 858void 859ieee80211_sta_leave(struct ieee80211_node *ni) 860{ 861 struct ieee80211com *ic = ni->ni_ic; 862 863 ic->ic_node_cleanup(ni); 864 ieee80211_notify_node_leave(ni); 865} 866 867/* 868 * Send a deauthenticate frame and drop the station. 869 */ 870void 871ieee80211_node_deauth(struct ieee80211_node *ni, int reason) 872{ 873 /* NB: bump the refcnt to be sure temporay nodes are not reclaimed */ 874 ieee80211_ref_node(ni); 875 if (ni->ni_associd != 0) 876 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH, reason); 877 ieee80211_node_leave(ni); 878 ieee80211_free_node(ni); 879} 880 881static struct ieee80211_node * 882node_alloc(struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 883{ 884 struct ieee80211_node *ni; 885 886 ni = (struct ieee80211_node *) malloc(sizeof(struct ieee80211_node), 887 M_80211_NODE, M_NOWAIT | M_ZERO); 888 return ni; 889} 890 891/* 892 * Initialize an ie blob with the specified data. If previous 893 * data exists re-use the data block. As a side effect we clear 894 * all references to specific ie's; the caller is required to 895 * recalculate them. 896 */ 897int 898ieee80211_ies_init(struct ieee80211_ies *ies, const uint8_t *data, int len) 899{ 900 /* NB: assumes data+len are the last fields */ 901 memset(ies, 0, offsetof(struct ieee80211_ies, data)); 902 if (ies->data != NULL && ies->len != len) { 903 /* data size changed */ 904 free(ies->data, M_80211_NODE_IE); 905 ies->data = NULL; 906 } 907 if (ies->data == NULL) { 908 ies->data = (uint8_t *) malloc(len, M_80211_NODE_IE, M_NOWAIT); 909 if (ies->data == NULL) { 910 ies->len = 0; 911 /* NB: pointers have already been zero'd above */ 912 return 0; 913 } 914 } 915 memcpy(ies->data, data, len); 916 ies->len = len; 917 return 1; 918} 919 920/* 921 * Reclaim storage for an ie blob. 922 */ 923void 924ieee80211_ies_cleanup(struct ieee80211_ies *ies) 925{ 926 if (ies->data != NULL) 927 free(ies->data, M_80211_NODE_IE); 928} 929 930/* 931 * Expand an ie blob data contents and to fillin individual 932 * ie pointers. The data blob is assumed to be well-formed; 933 * we don't do any validity checking of ie lengths. 934 */ 935void 936ieee80211_ies_expand(struct ieee80211_ies *ies) 937{ 938 uint8_t *ie; 939 int ielen; 940 941 ie = ies->data; 942 ielen = ies->len; 943 while (ielen > 0) { 944 switch (ie[0]) { 945 case IEEE80211_ELEMID_VENDOR: 946 if (iswpaoui(ie)) 947 ies->wpa_ie = ie; 948 else if (iswmeoui(ie)) 949 ies->wme_ie = ie; 950#ifdef IEEE80211_SUPPORT_SUPERG 951 else if (isatherosoui(ie)) 952 ies->ath_ie = ie; 953#endif 954#ifdef IEEE80211_SUPPORT_TDMA 955 else if (istdmaoui(ie)) 956 ies->tdma_ie = ie; 957#endif 958 break; 959 case IEEE80211_ELEMID_RSN: 960 ies->rsn_ie = ie; 961 break; 962 case IEEE80211_ELEMID_HTCAP: 963 ies->htcap_ie = ie; 964 break; 965 case IEEE80211_ELEMID_HTINFO: 966 ies->htinfo_ie = ie; 967 break; 968#ifdef IEEE80211_SUPPORT_MESH 969 case IEEE80211_ELEMID_MESHID: 970 ies->meshid_ie = ie; 971 break; 972#endif 973 } 974 ielen -= 2 + ie[1]; 975 ie += 2 + ie[1]; 976 } 977} 978 979/* 980 * Reclaim any resources in a node and reset any critical 981 * state. Typically nodes are free'd immediately after, 982 * but in some cases the storage may be reused so we need 983 * to insure consistent state (should probably fix that). 984 */ 985static void 986node_cleanup(struct ieee80211_node *ni) 987{ 988 struct ieee80211vap *vap = ni->ni_vap; 989 struct ieee80211com *ic = ni->ni_ic; 990 int i; 991 992 /* NB: preserve ni_table */ 993 if (ni->ni_flags & IEEE80211_NODE_PWR_MGT) { 994 if (vap->iv_opmode != IEEE80211_M_STA) 995 vap->iv_ps_sta--; 996 ni->ni_flags &= ~IEEE80211_NODE_PWR_MGT; 997 IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni, 998 "power save mode off, %u sta's in ps mode", vap->iv_ps_sta); 999 } 1000 /* 1001 * Cleanup any HT-related state. 1002 */ 1003 if (ni->ni_flags & IEEE80211_NODE_HT) 1004 ieee80211_ht_node_cleanup(ni); 1005#ifdef IEEE80211_SUPPORT_SUPERG 1006 else if (ni->ni_ath_flags & IEEE80211_NODE_ATH) 1007 ieee80211_ff_node_cleanup(ni); 1008#endif 1009#ifdef IEEE80211_SUPPORT_MESH 1010 /* 1011 * Cleanup any mesh-related state. 1012 */ 1013 if (vap->iv_opmode == IEEE80211_M_MBSS) 1014 ieee80211_mesh_node_cleanup(ni); 1015#endif 1016 /* 1017 * Clear any staging queue entries. 1018 */ 1019 ieee80211_ageq_drain_node(&ic->ic_stageq, ni); 1020 1021 /* 1022 * Clear AREF flag that marks the authorization refcnt bump 1023 * has happened. This is probably not needed as the node 1024 * should always be removed from the table so not found but 1025 * do it just in case. 1026 * Likewise clear the ASSOCID flag as these flags are intended 1027 * to be managed in tandem. 1028 */ 1029 ni->ni_flags &= ~(IEEE80211_NODE_AREF | IEEE80211_NODE_ASSOCID); 1030 1031 /* 1032 * Drain power save queue and, if needed, clear TIM. 1033 */ 1034 if (ieee80211_node_psq_drain(ni) != 0 && vap->iv_set_tim != NULL) 1035 vap->iv_set_tim(ni, 0); 1036 1037 ni->ni_associd = 0; 1038 if (ni->ni_challenge != NULL) { 1039 free(ni->ni_challenge, M_80211_NODE); 1040 ni->ni_challenge = NULL; 1041 } 1042 /* 1043 * Preserve SSID, WPA, and WME ie's so the bss node is 1044 * reusable during a re-auth/re-assoc state transition. 1045 * If we remove these data they will not be recreated 1046 * because they come from a probe-response or beacon frame 1047 * which cannot be expected prior to the association-response. 1048 * This should not be an issue when operating in other modes 1049 * as stations leaving always go through a full state transition 1050 * which will rebuild this state. 1051 * 1052 * XXX does this leave us open to inheriting old state? 1053 */ 1054 for (i = 0; i < nitems(ni->ni_rxfrag); i++) 1055 if (ni->ni_rxfrag[i] != NULL) { 1056 m_freem(ni->ni_rxfrag[i]); 1057 ni->ni_rxfrag[i] = NULL; 1058 } 1059 /* 1060 * Must be careful here to remove any key map entry w/o a LOR. 1061 */ 1062 ieee80211_node_delucastkey(ni); 1063} 1064 1065static void 1066node_free(struct ieee80211_node *ni) 1067{ 1068 struct ieee80211com *ic = ni->ni_ic; 1069 1070 ieee80211_ratectl_node_deinit(ni); 1071 ic->ic_node_cleanup(ni); 1072 ieee80211_ies_cleanup(&ni->ni_ies); 1073 ieee80211_psq_cleanup(&ni->ni_psq); 1074 free(ni, M_80211_NODE); 1075} 1076 1077static void 1078node_age(struct ieee80211_node *ni) 1079{ 1080 struct ieee80211vap *vap = ni->ni_vap; 1081 1082 IEEE80211_NODE_LOCK_ASSERT(&vap->iv_ic->ic_sta); 1083 1084 /* 1085 * Age frames on the power save queue. 1086 */ 1087 if (ieee80211_node_psq_age(ni) != 0 && 1088 ni->ni_psq.psq_len == 0 && vap->iv_set_tim != NULL) 1089 vap->iv_set_tim(ni, 0); 1090 /* 1091 * Age out HT resources (e.g. frames on the 1092 * A-MPDU reorder queues). 1093 */ 1094 if (ni->ni_associd != 0 && (ni->ni_flags & IEEE80211_NODE_HT)) 1095 ieee80211_ht_node_age(ni); 1096} 1097 1098static int8_t 1099node_getrssi(const struct ieee80211_node *ni) 1100{ 1101 uint32_t avgrssi = ni->ni_avgrssi; 1102 int32_t rssi; 1103 1104 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) 1105 return 0; 1106 rssi = IEEE80211_RSSI_GET(avgrssi); 1107 return rssi < 0 ? 0 : rssi > 127 ? 127 : rssi; 1108} 1109 1110static void 1111node_getsignal(const struct ieee80211_node *ni, int8_t *rssi, int8_t *noise) 1112{ 1113 *rssi = node_getrssi(ni); 1114 *noise = ni->ni_noise; 1115} 1116 1117static void 1118node_getmimoinfo(const struct ieee80211_node *ni, 1119 struct ieee80211_mimo_info *info) 1120{ 1121 int i; 1122 uint32_t avgrssi; 1123 int32_t rssi; 1124 1125 bzero(info, sizeof(*info)); 1126 1127 for (i = 0; i < ni->ni_mimo_chains; i++) { 1128 avgrssi = ni->ni_mimo_rssi_ctl[i]; 1129 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) { 1130 info->rssi[i] = 0; 1131 } else { 1132 rssi = IEEE80211_RSSI_GET(avgrssi); 1133 info->rssi[i] = rssi < 0 ? 0 : rssi > 127 ? 127 : rssi; 1134 } 1135 info->noise[i] = ni->ni_mimo_noise_ctl[i]; 1136 } 1137 1138 /* XXX ext radios? */ 1139 1140 /* XXX EVM? */ 1141} 1142 1143struct ieee80211_node * 1144ieee80211_alloc_node(struct ieee80211_node_table *nt, 1145 struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1146{ 1147 struct ieee80211com *ic = nt->nt_ic; 1148 struct ieee80211_node *ni; 1149 int hash; 1150 1151 ni = ic->ic_node_alloc(vap, macaddr); 1152 if (ni == NULL) { 1153 vap->iv_stats.is_rx_nodealloc++; 1154 return NULL; 1155 } 1156 1157 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1158 "%s %p<%s> in %s table\n", __func__, ni, 1159 ether_sprintf(macaddr), nt->nt_name); 1160 1161 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1162 hash = IEEE80211_NODE_HASH(ic, macaddr); 1163 ieee80211_node_initref(ni); /* mark referenced */ 1164 ni->ni_chan = IEEE80211_CHAN_ANYC; 1165 ni->ni_authmode = IEEE80211_AUTH_OPEN; 1166 ni->ni_txpower = ic->ic_txpowlimit; /* max power */ 1167 ni->ni_txparms = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)]; 1168 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE); 1169 ni->ni_avgrssi = IEEE80211_RSSI_DUMMY_MARKER; 1170 ni->ni_inact_reload = nt->nt_inact_init; 1171 ni->ni_inact = ni->ni_inact_reload; 1172 ni->ni_ath_defkeyix = 0x7fff; 1173 ieee80211_psq_init(&ni->ni_psq, "unknown"); 1174#ifdef IEEE80211_SUPPORT_MESH 1175 if (vap->iv_opmode == IEEE80211_M_MBSS) 1176 ieee80211_mesh_node_init(vap, ni); 1177#endif 1178 IEEE80211_NODE_LOCK(nt); 1179 TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list); 1180 LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash); 1181 ni->ni_table = nt; 1182 ni->ni_vap = vap; 1183 ni->ni_ic = ic; 1184 IEEE80211_NODE_UNLOCK(nt); 1185 1186 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 1187 "%s: inact_reload %u", __func__, ni->ni_inact_reload); 1188 1189 ieee80211_ratectl_node_init(ni); 1190 1191 return ni; 1192} 1193 1194/* 1195 * Craft a temporary node suitable for sending a management frame 1196 * to the specified station. We craft only as much state as we 1197 * need to do the work since the node will be immediately reclaimed 1198 * once the send completes. 1199 */ 1200struct ieee80211_node * 1201ieee80211_tmp_node(struct ieee80211vap *vap, 1202 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1203{ 1204 struct ieee80211com *ic = vap->iv_ic; 1205 struct ieee80211_node *ni; 1206 1207 ni = ic->ic_node_alloc(vap, macaddr); 1208 if (ni != NULL) { 1209 struct ieee80211_node *bss = vap->iv_bss; 1210 1211 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1212 "%s %p<%s>\n", __func__, ni, ether_sprintf(macaddr)); 1213 1214 ni->ni_table = NULL; /* NB: pedantic */ 1215 ni->ni_ic = ic; /* NB: needed to set channel */ 1216 ni->ni_vap = vap; 1217 1218 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1219 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1220 ieee80211_node_initref(ni); /* mark referenced */ 1221 /* NB: required by ieee80211_fix_rate */ 1222 ieee80211_node_set_chan(ni, bss->ni_chan); 1223 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, 1224 IEEE80211_KEYIX_NONE); 1225 ni->ni_txpower = bss->ni_txpower; 1226 /* XXX optimize away */ 1227 ieee80211_psq_init(&ni->ni_psq, "unknown"); 1228 1229 ieee80211_ratectl_node_init(ni); 1230 } else { 1231 /* XXX msg */ 1232 vap->iv_stats.is_rx_nodealloc++; 1233 } 1234 return ni; 1235} 1236 1237struct ieee80211_node * 1238ieee80211_dup_bss(struct ieee80211vap *vap, 1239 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1240{ 1241 struct ieee80211com *ic = vap->iv_ic; 1242 struct ieee80211_node *ni; 1243 1244 ni = ieee80211_alloc_node(&ic->ic_sta, vap, macaddr); 1245 if (ni != NULL) { 1246 struct ieee80211_node *bss = vap->iv_bss; 1247 /* 1248 * Inherit from iv_bss. 1249 */ 1250 copy_bss(ni, bss); 1251 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1252 ieee80211_node_set_chan(ni, bss->ni_chan); 1253 } 1254 return ni; 1255} 1256 1257/* 1258 * Create a bss node for a legacy WDS vap. The far end does 1259 * not associate so we just create create a new node and 1260 * simulate an association. The caller is responsible for 1261 * installing the node as the bss node and handling any further 1262 * setup work like authorizing the port. 1263 */ 1264struct ieee80211_node * 1265ieee80211_node_create_wds(struct ieee80211vap *vap, 1266 const uint8_t bssid[IEEE80211_ADDR_LEN], struct ieee80211_channel *chan) 1267{ 1268 struct ieee80211com *ic = vap->iv_ic; 1269 struct ieee80211_node *ni; 1270 1271 /* XXX check if node already in sta table? */ 1272 ni = ieee80211_alloc_node(&ic->ic_sta, vap, bssid); 1273 if (ni != NULL) { 1274 ni->ni_wdsvap = vap; 1275 IEEE80211_ADDR_COPY(ni->ni_bssid, bssid); 1276 /* 1277 * Inherit any manually configured settings. 1278 */ 1279 copy_bss(ni, vap->iv_bss); 1280 ieee80211_node_set_chan(ni, chan); 1281 /* NB: propagate ssid so available to WPA supplicant */ 1282 ni->ni_esslen = vap->iv_des_ssid[0].len; 1283 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen); 1284 /* NB: no associd for peer */ 1285 /* 1286 * There are no management frames to use to 1287 * discover neighbor capabilities, so blindly 1288 * propagate the local configuration. 1289 */ 1290 if (vap->iv_flags & IEEE80211_F_WME) 1291 ni->ni_flags |= IEEE80211_NODE_QOS; 1292#ifdef IEEE80211_SUPPORT_SUPERG 1293 if (vap->iv_flags & IEEE80211_F_FF) 1294 ni->ni_flags |= IEEE80211_NODE_FF; 1295#endif 1296 if ((ic->ic_htcaps & IEEE80211_HTC_HT) && 1297 (vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1298 /* 1299 * Device is HT-capable and HT is enabled for 1300 * the vap; setup HT operation. On return 1301 * ni_chan will be adjusted to an HT channel. 1302 */ 1303 ieee80211_ht_wds_init(ni); 1304 } else { 1305 struct ieee80211_channel *c = ni->ni_chan; 1306 /* 1307 * Force a legacy channel to be used. 1308 */ 1309 c = ieee80211_find_channel(ic, 1310 c->ic_freq, c->ic_flags &~ IEEE80211_CHAN_HT); 1311 KASSERT(c != NULL, ("no legacy channel, %u/%x", 1312 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags)); 1313 ni->ni_chan = c; 1314 } 1315 } 1316 return ni; 1317} 1318 1319struct ieee80211_node * 1320#ifdef IEEE80211_DEBUG_REFCNT 1321ieee80211_find_node_locked_debug(struct ieee80211_node_table *nt, 1322 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1323#else 1324ieee80211_find_node_locked(struct ieee80211_node_table *nt, 1325 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1326#endif 1327{ 1328 struct ieee80211_node *ni; 1329 int hash; 1330 1331 IEEE80211_NODE_LOCK_ASSERT(nt); 1332 1333 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr); 1334 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1335 if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1336 ieee80211_ref_node(ni); /* mark referenced */ 1337#ifdef IEEE80211_DEBUG_REFCNT 1338 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1339 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1340 func, line, 1341 ni, ether_sprintf(ni->ni_macaddr), 1342 ieee80211_node_refcnt(ni)); 1343#endif 1344 return ni; 1345 } 1346 } 1347 return NULL; 1348} 1349 1350struct ieee80211_node * 1351#ifdef IEEE80211_DEBUG_REFCNT 1352ieee80211_find_node_debug(struct ieee80211_node_table *nt, 1353 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1354#else 1355ieee80211_find_node(struct ieee80211_node_table *nt, 1356 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1357#endif 1358{ 1359 struct ieee80211_node *ni; 1360 1361 IEEE80211_NODE_LOCK(nt); 1362 ni = ieee80211_find_node_locked(nt, macaddr); 1363 IEEE80211_NODE_UNLOCK(nt); 1364 return ni; 1365} 1366 1367struct ieee80211_node * 1368#ifdef IEEE80211_DEBUG_REFCNT 1369ieee80211_find_vap_node_locked_debug(struct ieee80211_node_table *nt, 1370 const struct ieee80211vap *vap, 1371 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1372#else 1373ieee80211_find_vap_node_locked(struct ieee80211_node_table *nt, 1374 const struct ieee80211vap *vap, 1375 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1376#endif 1377{ 1378 struct ieee80211_node *ni; 1379 int hash; 1380 1381 IEEE80211_NODE_LOCK_ASSERT(nt); 1382 1383 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr); 1384 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1385 if (ni->ni_vap == vap && 1386 IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1387 ieee80211_ref_node(ni); /* mark referenced */ 1388#ifdef IEEE80211_DEBUG_REFCNT 1389 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1390 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1391 func, line, 1392 ni, ether_sprintf(ni->ni_macaddr), 1393 ieee80211_node_refcnt(ni)); 1394#endif 1395 return ni; 1396 } 1397 } 1398 return NULL; 1399} 1400 1401struct ieee80211_node * 1402#ifdef IEEE80211_DEBUG_REFCNT 1403ieee80211_find_vap_node_debug(struct ieee80211_node_table *nt, 1404 const struct ieee80211vap *vap, 1405 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1406#else 1407ieee80211_find_vap_node(struct ieee80211_node_table *nt, 1408 const struct ieee80211vap *vap, 1409 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1410#endif 1411{ 1412 struct ieee80211_node *ni; 1413 1414 IEEE80211_NODE_LOCK(nt); 1415 ni = ieee80211_find_vap_node_locked(nt, vap, macaddr); 1416 IEEE80211_NODE_UNLOCK(nt); 1417 return ni; 1418} 1419 1420/* 1421 * Fake up a node; this handles node discovery in adhoc mode. 1422 * Note that for the driver's benefit we we treat this like 1423 * an association so the driver has an opportunity to setup 1424 * it's private state. 1425 */ 1426struct ieee80211_node * 1427ieee80211_fakeup_adhoc_node(struct ieee80211vap *vap, 1428 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1429{ 1430 struct ieee80211_node *ni; 1431 1432 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE | IEEE80211_MSG_ASSOC, 1433 "%s: mac<%s>\n", __func__, ether_sprintf(macaddr)); 1434 ni = ieee80211_dup_bss(vap, macaddr); 1435 if (ni != NULL) { 1436 struct ieee80211com *ic = vap->iv_ic; 1437 1438 /* XXX no rate negotiation; just dup */ 1439 ni->ni_rates = vap->iv_bss->ni_rates; 1440 if (ieee80211_iserp_rateset(&ni->ni_rates)) 1441 ni->ni_flags |= IEEE80211_NODE_ERP; 1442 if (vap->iv_opmode == IEEE80211_M_AHDEMO) { 1443 /* 1444 * In adhoc demo mode there are no management 1445 * frames to use to discover neighbor capabilities, 1446 * so blindly propagate the local configuration 1447 * so we can do interesting things (e.g. use 1448 * WME to disable ACK's). 1449 */ 1450 if (vap->iv_flags & IEEE80211_F_WME) 1451 ni->ni_flags |= IEEE80211_NODE_QOS; 1452#ifdef IEEE80211_SUPPORT_SUPERG 1453 if (vap->iv_flags & IEEE80211_F_FF) 1454 ni->ni_flags |= IEEE80211_NODE_FF; 1455#endif 1456 } 1457 ieee80211_node_setuptxparms(ni); 1458 ieee80211_ratectl_node_init(ni); 1459 if (ic->ic_newassoc != NULL) 1460 ic->ic_newassoc(ni, 1); 1461 /* XXX not right for 802.1x/WPA */ 1462 ieee80211_node_authorize(ni); 1463 } 1464 return ni; 1465} 1466 1467void 1468ieee80211_init_neighbor(struct ieee80211_node *ni, 1469 const struct ieee80211_frame *wh, 1470 const struct ieee80211_scanparams *sp) 1471{ 1472 int do_ht_setup = 0; 1473 1474 ni->ni_esslen = sp->ssid[1]; 1475 memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]); 1476 IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3); 1477 memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp)); 1478 ni->ni_intval = sp->bintval; 1479 ni->ni_capinfo = sp->capinfo; 1480 ni->ni_chan = ni->ni_ic->ic_curchan; 1481 ni->ni_fhdwell = sp->fhdwell; 1482 ni->ni_fhindex = sp->fhindex; 1483 ni->ni_erp = sp->erp; 1484 ni->ni_timoff = sp->timoff; 1485#ifdef IEEE80211_SUPPORT_MESH 1486 if (ni->ni_vap->iv_opmode == IEEE80211_M_MBSS) 1487 ieee80211_mesh_init_neighbor(ni, wh, sp); 1488#endif 1489 if (ieee80211_ies_init(&ni->ni_ies, sp->ies, sp->ies_len)) { 1490 ieee80211_ies_expand(&ni->ni_ies); 1491 if (ni->ni_ies.wme_ie != NULL) 1492 ni->ni_flags |= IEEE80211_NODE_QOS; 1493 else 1494 ni->ni_flags &= ~IEEE80211_NODE_QOS; 1495#ifdef IEEE80211_SUPPORT_SUPERG 1496 if (ni->ni_ies.ath_ie != NULL) 1497 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 1498#endif 1499 if (ni->ni_ies.htcap_ie != NULL) 1500 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie); 1501 if (ni->ni_ies.htinfo_ie != NULL) 1502 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie); 1503 1504 if ((ni->ni_ies.htcap_ie != NULL) && 1505 (ni->ni_ies.htinfo_ie != NULL) && 1506 (ni->ni_vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1507 do_ht_setup = 1; 1508 } 1509 } 1510 1511 /* NB: must be after ni_chan is setup */ 1512 ieee80211_setup_rates(ni, sp->rates, sp->xrates, 1513 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 1514 IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 1515 1516 /* 1517 * If the neighbor is HT compatible, flip that on. 1518 */ 1519 if (do_ht_setup) { 1520 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 1521 "%s: doing HT setup\n", __func__); 1522 ieee80211_ht_node_init(ni); 1523 ieee80211_ht_updateparams(ni, 1524 ni->ni_ies.htcap_ie, 1525 ni->ni_ies.htinfo_ie); 1526 ieee80211_setup_htrates(ni, 1527 ni->ni_ies.htcap_ie, 1528 IEEE80211_F_JOIN | IEEE80211_F_DOBRS); 1529 ieee80211_setup_basic_htrates(ni, 1530 ni->ni_ies.htinfo_ie); 1531 ieee80211_node_setuptxparms(ni); 1532 ieee80211_ratectl_node_init(ni); 1533 } 1534} 1535 1536/* 1537 * Do node discovery in adhoc mode on receipt of a beacon 1538 * or probe response frame. Note that for the driver's 1539 * benefit we we treat this like an association so the 1540 * driver has an opportunity to setup it's private state. 1541 */ 1542struct ieee80211_node * 1543ieee80211_add_neighbor(struct ieee80211vap *vap, 1544 const struct ieee80211_frame *wh, 1545 const struct ieee80211_scanparams *sp) 1546{ 1547 struct ieee80211_node *ni; 1548 1549 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 1550 "%s: mac<%s>\n", __func__, ether_sprintf(wh->i_addr2)); 1551 ni = ieee80211_dup_bss(vap, wh->i_addr2);/* XXX alloc_node? */ 1552 if (ni != NULL) { 1553 struct ieee80211com *ic = vap->iv_ic; 1554 1555 ieee80211_init_neighbor(ni, wh, sp); 1556 if (ieee80211_iserp_rateset(&ni->ni_rates)) 1557 ni->ni_flags |= IEEE80211_NODE_ERP; 1558 ieee80211_node_setuptxparms(ni); 1559 ieee80211_ratectl_node_init(ni); 1560 if (ic->ic_newassoc != NULL) 1561 ic->ic_newassoc(ni, 1); 1562 /* XXX not right for 802.1x/WPA */ 1563 ieee80211_node_authorize(ni); 1564 } 1565 return ni; 1566} 1567 1568#define IS_PROBEREQ(wh) \ 1569 ((wh->i_fc[0] & (IEEE80211_FC0_TYPE_MASK|IEEE80211_FC0_SUBTYPE_MASK)) \ 1570 == (IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ)) 1571#define IS_BCAST_PROBEREQ(wh) \ 1572 (IS_PROBEREQ(wh) && IEEE80211_IS_MULTICAST( \ 1573 ((const struct ieee80211_frame *)(wh))->i_addr3)) 1574 1575static __inline struct ieee80211_node * 1576_find_rxnode(struct ieee80211_node_table *nt, 1577 const struct ieee80211_frame_min *wh) 1578{ 1579 if (IS_BCAST_PROBEREQ(wh)) 1580 return NULL; /* spam bcast probe req to all vap's */ 1581 return ieee80211_find_node_locked(nt, wh->i_addr2); 1582} 1583 1584/* 1585 * Locate the node for sender, track state, and then pass the 1586 * (referenced) node up to the 802.11 layer for its use. Note 1587 * we can return NULL if the sender is not in the table. 1588 */ 1589struct ieee80211_node * 1590#ifdef IEEE80211_DEBUG_REFCNT 1591ieee80211_find_rxnode_debug(struct ieee80211com *ic, 1592 const struct ieee80211_frame_min *wh, const char *func, int line) 1593#else 1594ieee80211_find_rxnode(struct ieee80211com *ic, 1595 const struct ieee80211_frame_min *wh) 1596#endif 1597{ 1598 struct ieee80211_node_table *nt; 1599 struct ieee80211_node *ni; 1600 1601 nt = &ic->ic_sta; 1602 IEEE80211_NODE_LOCK(nt); 1603 ni = _find_rxnode(nt, wh); 1604 IEEE80211_NODE_UNLOCK(nt); 1605 1606 return ni; 1607} 1608 1609/* 1610 * Like ieee80211_find_rxnode but use the supplied h/w 1611 * key index as a hint to locate the node in the key 1612 * mapping table. If an entry is present at the key 1613 * index we return it; otherwise do a normal lookup and 1614 * update the mapping table if the station has a unicast 1615 * key assigned to it. 1616 */ 1617struct ieee80211_node * 1618#ifdef IEEE80211_DEBUG_REFCNT 1619ieee80211_find_rxnode_withkey_debug(struct ieee80211com *ic, 1620 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix, 1621 const char *func, int line) 1622#else 1623ieee80211_find_rxnode_withkey(struct ieee80211com *ic, 1624 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix) 1625#endif 1626{ 1627 struct ieee80211_node_table *nt; 1628 struct ieee80211_node *ni; 1629 1630 nt = &ic->ic_sta; 1631 IEEE80211_NODE_LOCK(nt); 1632 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) 1633 ni = nt->nt_keyixmap[keyix]; 1634 else 1635 ni = NULL; 1636 if (ni == NULL) { 1637 ni = _find_rxnode(nt, wh); 1638 if (ni != NULL && nt->nt_keyixmap != NULL) { 1639 /* 1640 * If the station has a unicast key cache slot 1641 * assigned update the key->node mapping table. 1642 */ 1643 keyix = ni->ni_ucastkey.wk_rxkeyix; 1644 /* XXX can keyixmap[keyix] != NULL? */ 1645 if (keyix < nt->nt_keyixmax && 1646 nt->nt_keyixmap[keyix] == NULL) { 1647 IEEE80211_DPRINTF(ni->ni_vap, 1648 IEEE80211_MSG_NODE, 1649 "%s: add key map entry %p<%s> refcnt %d\n", 1650 __func__, ni, ether_sprintf(ni->ni_macaddr), 1651 ieee80211_node_refcnt(ni)+1); 1652 nt->nt_keyixmap[keyix] = ieee80211_ref_node(ni); 1653 } 1654 } 1655 } else { 1656 if (IS_BCAST_PROBEREQ(wh)) 1657 ni = NULL; /* spam bcast probe req to all vap's */ 1658 else 1659 ieee80211_ref_node(ni); 1660 } 1661 IEEE80211_NODE_UNLOCK(nt); 1662 1663 return ni; 1664} 1665#undef IS_BCAST_PROBEREQ 1666#undef IS_PROBEREQ 1667 1668/* 1669 * Return a reference to the appropriate node for sending 1670 * a data frame. This handles node discovery in adhoc networks. 1671 */ 1672struct ieee80211_node * 1673#ifdef IEEE80211_DEBUG_REFCNT 1674ieee80211_find_txnode_debug(struct ieee80211vap *vap, 1675 const uint8_t macaddr[IEEE80211_ADDR_LEN], 1676 const char *func, int line) 1677#else 1678ieee80211_find_txnode(struct ieee80211vap *vap, 1679 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1680#endif 1681{ 1682 struct ieee80211_node_table *nt = &vap->iv_ic->ic_sta; 1683 struct ieee80211_node *ni; 1684 1685 /* 1686 * The destination address should be in the node table 1687 * unless this is a multicast/broadcast frame. We can 1688 * also optimize station mode operation, all frames go 1689 * to the bss node. 1690 */ 1691 /* XXX can't hold lock across dup_bss 'cuz of recursive locking */ 1692 IEEE80211_NODE_LOCK(nt); 1693 if (vap->iv_opmode == IEEE80211_M_STA || 1694 vap->iv_opmode == IEEE80211_M_WDS || 1695 IEEE80211_IS_MULTICAST(macaddr)) 1696 ni = ieee80211_ref_node(vap->iv_bss); 1697 else 1698 ni = ieee80211_find_node_locked(nt, macaddr); 1699 IEEE80211_NODE_UNLOCK(nt); 1700 1701 if (ni == NULL) { 1702 if (vap->iv_opmode == IEEE80211_M_IBSS || 1703 vap->iv_opmode == IEEE80211_M_AHDEMO) { 1704 /* 1705 * In adhoc mode cons up a node for the destination. 1706 * Note that we need an additional reference for the 1707 * caller to be consistent with 1708 * ieee80211_find_node_locked. 1709 */ 1710 ni = ieee80211_fakeup_adhoc_node(vap, macaddr); 1711 if (ni != NULL) 1712 (void) ieee80211_ref_node(ni); 1713 } else { 1714 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, macaddr, 1715 "no node, discard frame (%s)", __func__); 1716 vap->iv_stats.is_tx_nonode++; 1717 } 1718 } 1719 return ni; 1720} 1721 1722static void 1723_ieee80211_free_node(struct ieee80211_node *ni) 1724{ 1725 struct ieee80211_node_table *nt = ni->ni_table; 1726 1727 /* 1728 * NB: careful about referencing the vap as it may be 1729 * gone if the last reference was held by a driver. 1730 * We know the com will always be present so it's safe 1731 * to use ni_ic below to reclaim resources. 1732 */ 1733#if 0 1734 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1735 "%s %p<%s> in %s table\n", __func__, ni, 1736 ether_sprintf(ni->ni_macaddr), 1737 nt != NULL ? nt->nt_name : "<gone>"); 1738#endif 1739 if (ni->ni_associd != 0) { 1740 struct ieee80211vap *vap = ni->ni_vap; 1741 if (vap->iv_aid_bitmap != NULL) 1742 IEEE80211_AID_CLR(vap, ni->ni_associd); 1743 } 1744 if (nt != NULL) { 1745 TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1746 LIST_REMOVE(ni, ni_hash); 1747 } 1748 ni->ni_ic->ic_node_free(ni); 1749} 1750 1751void 1752#ifdef IEEE80211_DEBUG_REFCNT 1753ieee80211_free_node_debug(struct ieee80211_node *ni, const char *func, int line) 1754#else 1755ieee80211_free_node(struct ieee80211_node *ni) 1756#endif 1757{ 1758 struct ieee80211_node_table *nt = ni->ni_table; 1759 1760#ifdef IEEE80211_DEBUG_REFCNT 1761 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1762 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni, 1763 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1); 1764#endif 1765 if (nt != NULL) { 1766 IEEE80211_NODE_LOCK(nt); 1767 if (ieee80211_node_dectestref(ni)) { 1768 /* 1769 * Last reference, reclaim state. 1770 */ 1771 _ieee80211_free_node(ni); 1772 } else if (ieee80211_node_refcnt(ni) == 1 && 1773 nt->nt_keyixmap != NULL) { 1774 ieee80211_keyix keyix; 1775 /* 1776 * Check for a last reference in the key mapping table. 1777 */ 1778 keyix = ni->ni_ucastkey.wk_rxkeyix; 1779 if (keyix < nt->nt_keyixmax && 1780 nt->nt_keyixmap[keyix] == ni) { 1781 IEEE80211_DPRINTF(ni->ni_vap, 1782 IEEE80211_MSG_NODE, 1783 "%s: %p<%s> clear key map entry", __func__, 1784 ni, ether_sprintf(ni->ni_macaddr)); 1785 nt->nt_keyixmap[keyix] = NULL; 1786 ieee80211_node_decref(ni); /* XXX needed? */ 1787 _ieee80211_free_node(ni); 1788 } 1789 } 1790 IEEE80211_NODE_UNLOCK(nt); 1791 } else { 1792 if (ieee80211_node_dectestref(ni)) 1793 _ieee80211_free_node(ni); 1794 } 1795} 1796 1797/* 1798 * Reclaim a unicast key and clear any key cache state. 1799 */ 1800int 1801ieee80211_node_delucastkey(struct ieee80211_node *ni) 1802{ 1803 struct ieee80211com *ic = ni->ni_ic; 1804 struct ieee80211_node_table *nt = &ic->ic_sta; 1805 struct ieee80211_node *nikey; 1806 ieee80211_keyix keyix; 1807 int isowned, status; 1808 1809 /* 1810 * NB: We must beware of LOR here; deleting the key 1811 * can cause the crypto layer to block traffic updates 1812 * which can generate a LOR against the node table lock; 1813 * grab it here and stash the key index for our use below. 1814 * 1815 * Must also beware of recursion on the node table lock. 1816 * When called from node_cleanup we may already have 1817 * the node table lock held. Unfortunately there's no 1818 * way to separate out this path so we must do this 1819 * conditionally. 1820 */ 1821 isowned = IEEE80211_NODE_IS_LOCKED(nt); 1822 if (!isowned) 1823 IEEE80211_NODE_LOCK(nt); 1824 nikey = NULL; 1825 status = 1; /* NB: success */ 1826 if (ni->ni_ucastkey.wk_keyix != IEEE80211_KEYIX_NONE) { 1827 keyix = ni->ni_ucastkey.wk_rxkeyix; 1828 status = ieee80211_crypto_delkey(ni->ni_vap, &ni->ni_ucastkey); 1829 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) { 1830 nikey = nt->nt_keyixmap[keyix]; 1831 nt->nt_keyixmap[keyix] = NULL; 1832 } 1833 } 1834 if (!isowned) 1835 IEEE80211_NODE_UNLOCK(nt); 1836 1837 if (nikey != NULL) { 1838 KASSERT(nikey == ni, 1839 ("key map out of sync, ni %p nikey %p", ni, nikey)); 1840 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1841 "%s: delete key map entry %p<%s> refcnt %d\n", 1842 __func__, ni, ether_sprintf(ni->ni_macaddr), 1843 ieee80211_node_refcnt(ni)-1); 1844 ieee80211_free_node(ni); 1845 } 1846 return status; 1847} 1848 1849/* 1850 * Reclaim a node. If this is the last reference count then 1851 * do the normal free work. Otherwise remove it from the node 1852 * table and mark it gone by clearing the back-reference. 1853 */ 1854static void 1855node_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 1856{ 1857 ieee80211_keyix keyix; 1858 1859 IEEE80211_NODE_LOCK_ASSERT(nt); 1860 1861 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1862 "%s: remove %p<%s> from %s table, refcnt %d\n", 1863 __func__, ni, ether_sprintf(ni->ni_macaddr), 1864 nt->nt_name, ieee80211_node_refcnt(ni)-1); 1865 /* 1866 * Clear any entry in the unicast key mapping table. 1867 * We need to do it here so rx lookups don't find it 1868 * in the mapping table even if it's not in the hash 1869 * table. We cannot depend on the mapping table entry 1870 * being cleared because the node may not be free'd. 1871 */ 1872 keyix = ni->ni_ucastkey.wk_rxkeyix; 1873 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax && 1874 nt->nt_keyixmap[keyix] == ni) { 1875 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1876 "%s: %p<%s> clear key map entry %u\n", 1877 __func__, ni, ether_sprintf(ni->ni_macaddr), keyix); 1878 nt->nt_keyixmap[keyix] = NULL; 1879 ieee80211_node_decref(ni); /* NB: don't need free */ 1880 } 1881 if (!ieee80211_node_dectestref(ni)) { 1882 /* 1883 * Other references are present, just remove the 1884 * node from the table so it cannot be found. When 1885 * the references are dropped storage will be 1886 * reclaimed. 1887 */ 1888 TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1889 LIST_REMOVE(ni, ni_hash); 1890 ni->ni_table = NULL; /* clear reference */ 1891 } else 1892 _ieee80211_free_node(ni); 1893} 1894 1895/* 1896 * Node table support. 1897 */ 1898 1899static void 1900ieee80211_node_table_init(struct ieee80211com *ic, 1901 struct ieee80211_node_table *nt, 1902 const char *name, int inact, int keyixmax) 1903{ 1904 struct ifnet *ifp = ic->ic_ifp; 1905 1906 nt->nt_ic = ic; 1907 IEEE80211_NODE_LOCK_INIT(nt, ifp->if_xname); 1908 IEEE80211_NODE_ITERATE_LOCK_INIT(nt, ifp->if_xname); 1909 TAILQ_INIT(&nt->nt_node); 1910 nt->nt_name = name; 1911 nt->nt_scangen = 1; 1912 nt->nt_inact_init = inact; 1913 nt->nt_keyixmax = keyixmax; 1914 if (nt->nt_keyixmax > 0) { 1915 nt->nt_keyixmap = (struct ieee80211_node **) malloc( 1916 keyixmax * sizeof(struct ieee80211_node *), 1917 M_80211_NODE, M_NOWAIT | M_ZERO); 1918 if (nt->nt_keyixmap == NULL) 1919 if_printf(ic->ic_ifp, 1920 "Cannot allocate key index map with %u entries\n", 1921 keyixmax); 1922 } else 1923 nt->nt_keyixmap = NULL; 1924} 1925 1926static void 1927ieee80211_node_table_reset(struct ieee80211_node_table *nt, 1928 struct ieee80211vap *match) 1929{ 1930 struct ieee80211_node *ni, *next; 1931 1932 IEEE80211_NODE_LOCK(nt); 1933 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) { 1934 if (match != NULL && ni->ni_vap != match) 1935 continue; 1936 /* XXX can this happen? if so need's work */ 1937 if (ni->ni_associd != 0) { 1938 struct ieee80211vap *vap = ni->ni_vap; 1939 1940 if (vap->iv_auth->ia_node_leave != NULL) 1941 vap->iv_auth->ia_node_leave(ni); 1942 if (vap->iv_aid_bitmap != NULL) 1943 IEEE80211_AID_CLR(vap, ni->ni_associd); 1944 } 1945 ni->ni_wdsvap = NULL; /* clear reference */ 1946 node_reclaim(nt, ni); 1947 } 1948 if (match != NULL && match->iv_opmode == IEEE80211_M_WDS) { 1949 /* 1950 * Make a separate pass to clear references to this vap 1951 * held by DWDS entries. They will not be matched above 1952 * because ni_vap will point to the ap vap but we still 1953 * need to clear ni_wdsvap when the WDS vap is destroyed 1954 * and/or reset. 1955 */ 1956 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) 1957 if (ni->ni_wdsvap == match) 1958 ni->ni_wdsvap = NULL; 1959 } 1960 IEEE80211_NODE_UNLOCK(nt); 1961} 1962 1963static void 1964ieee80211_node_table_cleanup(struct ieee80211_node_table *nt) 1965{ 1966 ieee80211_node_table_reset(nt, NULL); 1967 if (nt->nt_keyixmap != NULL) { 1968#ifdef DIAGNOSTIC 1969 /* XXX verify all entries are NULL */ 1970 int i; 1971 for (i = 0; i < nt->nt_keyixmax; i++) 1972 if (nt->nt_keyixmap[i] != NULL) 1973 printf("%s: %s[%u] still active\n", __func__, 1974 nt->nt_name, i); 1975#endif 1976 free(nt->nt_keyixmap, M_80211_NODE); 1977 nt->nt_keyixmap = NULL; 1978 } 1979 IEEE80211_NODE_ITERATE_LOCK_DESTROY(nt); 1980 IEEE80211_NODE_LOCK_DESTROY(nt); 1981} 1982 1983/* 1984 * Timeout inactive stations and do related housekeeping. 1985 * Note that we cannot hold the node lock while sending a 1986 * frame as this would lead to a LOR. Instead we use a 1987 * generation number to mark nodes that we've scanned and 1988 * drop the lock and restart a scan if we have to time out 1989 * a node. Since we are single-threaded by virtue of 1990 * controlling the inactivity timer we can be sure this will 1991 * process each node only once. 1992 */ 1993static void 1994ieee80211_timeout_stations(struct ieee80211com *ic) 1995{ 1996 struct ieee80211_node_table *nt = &ic->ic_sta; 1997 struct ieee80211vap *vap; 1998 struct ieee80211_node *ni; 1999 int gen = 0; 2000 2001 IEEE80211_NODE_ITERATE_LOCK(nt); 2002 gen = ++nt->nt_scangen; 2003restart: 2004 IEEE80211_NODE_LOCK(nt); 2005 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2006 if (ni->ni_scangen == gen) /* previously handled */ 2007 continue; 2008 ni->ni_scangen = gen; 2009 /* 2010 * Ignore entries for which have yet to receive an 2011 * authentication frame. These are transient and 2012 * will be reclaimed when the last reference to them 2013 * goes away (when frame xmits complete). 2014 */ 2015 vap = ni->ni_vap; 2016 /* 2017 * Only process stations when in RUN state. This 2018 * insures, for example, that we don't timeout an 2019 * inactive station during CAC. Note that CSA state 2020 * is actually handled in ieee80211_node_timeout as 2021 * it applies to more than timeout processing. 2022 */ 2023 if (vap->iv_state != IEEE80211_S_RUN) 2024 continue; 2025 /* XXX can vap be NULL? */ 2026 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 2027 vap->iv_opmode == IEEE80211_M_STA) && 2028 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 2029 continue; 2030 /* 2031 * Free fragment if not needed anymore 2032 * (last fragment older than 1s). 2033 * XXX doesn't belong here, move to node_age 2034 */ 2035 if (ni->ni_rxfrag[0] != NULL && 2036 ticks > ni->ni_rxfragstamp + hz) { 2037 m_freem(ni->ni_rxfrag[0]); 2038 ni->ni_rxfrag[0] = NULL; 2039 } 2040 if (ni->ni_inact > 0) { 2041 ni->ni_inact--; 2042 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 2043 "%s: inact %u inact_reload %u nrates %u", 2044 __func__, ni->ni_inact, ni->ni_inact_reload, 2045 ni->ni_rates.rs_nrates); 2046 } 2047 /* 2048 * Special case ourself; we may be idle for extended periods 2049 * of time and regardless reclaiming our state is wrong. 2050 * XXX run ic_node_age 2051 */ 2052 if (ni == vap->iv_bss) 2053 continue; 2054 if (ni->ni_associd != 0 || 2055 (vap->iv_opmode == IEEE80211_M_IBSS || 2056 vap->iv_opmode == IEEE80211_M_AHDEMO)) { 2057 /* 2058 * Age/drain resources held by the station. 2059 */ 2060 ic->ic_node_age(ni); 2061 /* 2062 * Probe the station before time it out. We 2063 * send a null data frame which may not be 2064 * universally supported by drivers (need it 2065 * for ps-poll support so it should be...). 2066 * 2067 * XXX don't probe the station unless we've 2068 * received a frame from them (and have 2069 * some idea of the rates they are capable 2070 * of); this will get fixed more properly 2071 * soon with better handling of the rate set. 2072 */ 2073 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 2074 (0 < ni->ni_inact && 2075 ni->ni_inact <= vap->iv_inact_probe) && 2076 ni->ni_rates.rs_nrates != 0) { 2077 IEEE80211_NOTE(vap, 2078 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, 2079 ni, "%s", 2080 "probe station due to inactivity"); 2081 /* 2082 * Grab a reference before unlocking the table 2083 * so the node cannot be reclaimed before we 2084 * send the frame. ieee80211_send_nulldata 2085 * understands we've done this and reclaims the 2086 * ref for us as needed. 2087 */ 2088 ieee80211_ref_node(ni); 2089 IEEE80211_NODE_UNLOCK(nt); 2090 ieee80211_send_nulldata(ni); 2091 /* XXX stat? */ 2092 goto restart; 2093 } 2094 } 2095 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 2096 ni->ni_inact <= 0) { 2097 IEEE80211_NOTE(vap, 2098 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, ni, 2099 "station timed out due to inactivity " 2100 "(refcnt %u)", ieee80211_node_refcnt(ni)); 2101 /* 2102 * Send a deauthenticate frame and drop the station. 2103 * This is somewhat complicated due to reference counts 2104 * and locking. At this point a station will typically 2105 * have a reference count of 1. ieee80211_node_leave 2106 * will do a "free" of the node which will drop the 2107 * reference count. But in the meantime a reference 2108 * wil be held by the deauth frame. The actual reclaim 2109 * of the node will happen either after the tx is 2110 * completed or by ieee80211_node_leave. 2111 * 2112 * Separately we must drop the node lock before sending 2113 * in case the driver takes a lock, as this can result 2114 * in a LOR between the node lock and the driver lock. 2115 */ 2116 ieee80211_ref_node(ni); 2117 IEEE80211_NODE_UNLOCK(nt); 2118 if (ni->ni_associd != 0) { 2119 IEEE80211_SEND_MGMT(ni, 2120 IEEE80211_FC0_SUBTYPE_DEAUTH, 2121 IEEE80211_REASON_AUTH_EXPIRE); 2122 } 2123 ieee80211_node_leave(ni); 2124 ieee80211_free_node(ni); 2125 vap->iv_stats.is_node_timeout++; 2126 goto restart; 2127 } 2128 } 2129 IEEE80211_NODE_UNLOCK(nt); 2130 2131 IEEE80211_NODE_ITERATE_UNLOCK(nt); 2132} 2133 2134/* 2135 * Aggressively reclaim resources. This should be used 2136 * only in a critical situation to reclaim mbuf resources. 2137 */ 2138void 2139ieee80211_drain(struct ieee80211com *ic) 2140{ 2141 struct ieee80211_node_table *nt = &ic->ic_sta; 2142 struct ieee80211vap *vap; 2143 struct ieee80211_node *ni; 2144 2145 IEEE80211_NODE_LOCK(nt); 2146 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2147 /* 2148 * Ignore entries for which have yet to receive an 2149 * authentication frame. These are transient and 2150 * will be reclaimed when the last reference to them 2151 * goes away (when frame xmits complete). 2152 */ 2153 vap = ni->ni_vap; 2154 /* 2155 * Only process stations when in RUN state. This 2156 * insures, for example, that we don't timeout an 2157 * inactive station during CAC. Note that CSA state 2158 * is actually handled in ieee80211_node_timeout as 2159 * it applies to more than timeout processing. 2160 */ 2161 if (vap->iv_state != IEEE80211_S_RUN) 2162 continue; 2163 /* XXX can vap be NULL? */ 2164 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 2165 vap->iv_opmode == IEEE80211_M_STA) && 2166 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 2167 continue; 2168 /* 2169 * Free fragments. 2170 * XXX doesn't belong here, move to node_drain 2171 */ 2172 if (ni->ni_rxfrag[0] != NULL) { 2173 m_freem(ni->ni_rxfrag[0]); 2174 ni->ni_rxfrag[0] = NULL; 2175 } 2176 /* 2177 * Drain resources held by the station. 2178 */ 2179 ic->ic_node_drain(ni); 2180 } 2181 IEEE80211_NODE_UNLOCK(nt); 2182} 2183 2184/* 2185 * Per-ieee80211com inactivity timer callback. 2186 */ 2187void 2188ieee80211_node_timeout(void *arg) 2189{ 2190 struct ieee80211com *ic = arg; 2191 2192 /* 2193 * Defer timeout processing if a channel switch is pending. 2194 * We typically need to be mute so not doing things that 2195 * might generate frames is good to handle in one place. 2196 * Supressing the station timeout processing may extend the 2197 * lifetime of inactive stations (by not decrementing their 2198 * idle counters) but this should be ok unless the CSA is 2199 * active for an unusually long time. 2200 */ 2201 if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) { 2202 ieee80211_scan_timeout(ic); 2203 ieee80211_timeout_stations(ic); 2204 ieee80211_ageq_age(&ic->ic_stageq, IEEE80211_INACT_WAIT); 2205 2206 IEEE80211_LOCK(ic); 2207 ieee80211_erp_timeout(ic); 2208 ieee80211_ht_timeout(ic); 2209 IEEE80211_UNLOCK(ic); 2210 } 2211 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, 2212 ieee80211_node_timeout, ic); 2213} 2214 2215/* 2216 * Iterate over the node table and return an array of ref'ed nodes. 2217 * 2218 * This is separated out from calling the actual node function so that 2219 * no LORs will occur. 2220 * 2221 * If there are too many nodes (ie, the number of nodes doesn't fit 2222 * within 'max_aid' entries) then the node references will be freed 2223 * and an error will be returned. 2224 * 2225 * The responsibility of allocating and freeing "ni_arr" is up to 2226 * the caller. 2227 */ 2228int 2229ieee80211_iterate_nt(struct ieee80211_node_table *nt, 2230 struct ieee80211_node **ni_arr, uint16_t max_aid) 2231{ 2232 u_int gen; 2233 int i, j, ret; 2234 struct ieee80211_node *ni; 2235 2236 IEEE80211_NODE_ITERATE_LOCK(nt); 2237 IEEE80211_NODE_LOCK(nt); 2238 2239 gen = ++nt->nt_scangen; 2240 i = ret = 0; 2241 2242 /* 2243 * We simply assume here that since the node 2244 * scan generation doesn't change (as 2245 * we are holding both the node table and 2246 * node table iteration locks), we can simply 2247 * assign it to the node here. 2248 */ 2249 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2250 if (i >= max_aid) { 2251 ret = E2BIG; 2252 if_printf(nt->nt_ic->ic_ifp, 2253 "Node array overflow: max=%u", max_aid); 2254 break; 2255 } 2256 ni_arr[i] = ieee80211_ref_node(ni); 2257 ni_arr[i]->ni_scangen = gen; 2258 i++; 2259 } 2260 2261 /* 2262 * It's safe to unlock here. 2263 * 2264 * If we're successful, the list is returned. 2265 * If we're unsuccessful, the list is ignored 2266 * and we remove our references. 2267 * 2268 * This avoids any potential LOR with 2269 * ieee80211_free_node(). 2270 */ 2271 IEEE80211_NODE_UNLOCK(nt); 2272 IEEE80211_NODE_ITERATE_UNLOCK(nt); 2273 2274 /* 2275 * If ret is non-zero, we hit some kind of error. 2276 * Rather than walking some nodes, we'll walk none 2277 * of them. 2278 */ 2279 if (ret) { 2280 for (j = 0; j < i; j++) { 2281 /* ieee80211_free_node() locks by itself */ 2282 ieee80211_free_node(ni_arr[j]); 2283 } 2284 } 2285 2286 return (ret); 2287} 2288 2289/* 2290 * Just a wrapper, so we don't have to change every ieee80211_iterate_nodes() 2291 * reference in the source. 2292 * 2293 * Note that this fetches 'max_aid' from the first VAP, rather than finding 2294 * the largest max_aid from all VAPs. 2295 */ 2296void 2297ieee80211_iterate_nodes(struct ieee80211_node_table *nt, 2298 ieee80211_iter_func *f, void *arg) 2299{ 2300 struct ieee80211_node **ni_arr; 2301 size_t size; 2302 int i; 2303 uint16_t max_aid; 2304 struct ieee80211vap *vap; 2305 2306 /* Overdoing it default */ 2307 max_aid = IEEE80211_AID_MAX; 2308 2309 /* Handle the case of there being no vaps just yet */ 2310 vap = TAILQ_FIRST(&nt->nt_ic->ic_vaps); 2311 if (vap != NULL) 2312 max_aid = vap->iv_max_aid; 2313 2314 size = max_aid * sizeof(struct ieee80211_node *); 2315 ni_arr = (struct ieee80211_node **) malloc(size, M_80211_NODE, 2316 M_NOWAIT | M_ZERO); 2317 if (ni_arr == NULL) 2318 return; 2319 2320 /* 2321 * If this fails, the node table won't have any 2322 * valid entries - ieee80211_iterate_nt() frees 2323 * the references to them. So don't try walking 2324 * the table; just skip to the end and free the 2325 * temporary memory. 2326 */ 2327 if (ieee80211_iterate_nt(nt, ni_arr, max_aid) != 0) 2328 goto done; 2329 2330 for (i = 0; i < max_aid; i++) { 2331 if (ni_arr[i] == NULL) /* end of the list */ 2332 break; 2333 (*f)(arg, ni_arr[i]); 2334 /* ieee80211_free_node() locks by itself */ 2335 ieee80211_free_node(ni_arr[i]); 2336 } 2337 2338done: 2339 free(ni_arr, M_80211_NODE); 2340} 2341 2342void 2343ieee80211_dump_node(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 2344{ 2345 printf("0x%p: mac %s refcnt %d\n", ni, 2346 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)); 2347 printf("\tscangen %u authmode %u flags 0x%x\n", 2348 ni->ni_scangen, ni->ni_authmode, ni->ni_flags); 2349 printf("\tassocid 0x%x txpower %u vlan %u\n", 2350 ni->ni_associd, ni->ni_txpower, ni->ni_vlan); 2351 printf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n", 2352 ni->ni_txseqs[IEEE80211_NONQOS_TID], 2353 ni->ni_rxseqs[IEEE80211_NONQOS_TID] >> IEEE80211_SEQ_SEQ_SHIFT, 2354 ni->ni_rxseqs[IEEE80211_NONQOS_TID] & IEEE80211_SEQ_FRAG_MASK, 2355 ni->ni_rxfragstamp); 2356 printf("\trssi %d noise %d intval %u capinfo 0x%x\n", 2357 node_getrssi(ni), ni->ni_noise, 2358 ni->ni_intval, ni->ni_capinfo); 2359 printf("\tbssid %s essid \"%.*s\" channel %u:0x%x\n", 2360 ether_sprintf(ni->ni_bssid), 2361 ni->ni_esslen, ni->ni_essid, 2362 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags); 2363 printf("\tinact %u inact_reload %u txrate %u\n", 2364 ni->ni_inact, ni->ni_inact_reload, ni->ni_txrate); 2365 printf("\thtcap %x htparam %x htctlchan %u ht2ndchan %u\n", 2366 ni->ni_htcap, ni->ni_htparam, 2367 ni->ni_htctlchan, ni->ni_ht2ndchan); 2368 printf("\thtopmode %x htstbc %x chw %u\n", 2369 ni->ni_htopmode, ni->ni_htstbc, ni->ni_chw); 2370} 2371 2372void 2373ieee80211_dump_nodes(struct ieee80211_node_table *nt) 2374{ 2375 ieee80211_iterate_nodes(nt, 2376 (ieee80211_iter_func *) ieee80211_dump_node, nt); 2377} 2378 2379static void 2380ieee80211_notify_erp_locked(struct ieee80211com *ic) 2381{ 2382 struct ieee80211vap *vap; 2383 2384 IEEE80211_LOCK_ASSERT(ic); 2385 2386 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 2387 if (vap->iv_opmode == IEEE80211_M_HOSTAP) 2388 ieee80211_beacon_notify(vap, IEEE80211_BEACON_ERP); 2389} 2390 2391void 2392ieee80211_notify_erp(struct ieee80211com *ic) 2393{ 2394 IEEE80211_LOCK(ic); 2395 ieee80211_notify_erp_locked(ic); 2396 IEEE80211_UNLOCK(ic); 2397} 2398 2399/* 2400 * Handle a station joining an 11g network. 2401 */ 2402static void 2403ieee80211_node_join_11g(struct ieee80211_node *ni) 2404{ 2405 struct ieee80211com *ic = ni->ni_ic; 2406 2407 IEEE80211_LOCK_ASSERT(ic); 2408 2409 /* 2410 * Station isn't capable of short slot time. Bump 2411 * the count of long slot time stations and disable 2412 * use of short slot time. Note that the actual switch 2413 * over to long slot time use may not occur until the 2414 * next beacon transmission (per sec. 7.3.1.4 of 11g). 2415 */ 2416 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2417 ic->ic_longslotsta++; 2418 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2419 "station needs long slot time, count %d", 2420 ic->ic_longslotsta); 2421 /* XXX vap's w/ conflicting needs won't work */ 2422 if (!IEEE80211_IS_CHAN_108G(ic->ic_bsschan)) { 2423 /* 2424 * Don't force slot time when switched to turbo 2425 * mode as non-ERP stations won't be present; this 2426 * need only be done when on the normal G channel. 2427 */ 2428 ieee80211_set_shortslottime(ic, 0); 2429 } 2430 } 2431 /* 2432 * If the new station is not an ERP station 2433 * then bump the counter and enable protection 2434 * if configured. 2435 */ 2436 if (!ieee80211_iserp_rateset(&ni->ni_rates)) { 2437 ic->ic_nonerpsta++; 2438 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2439 "station is !ERP, %d non-ERP stations associated", 2440 ic->ic_nonerpsta); 2441 /* 2442 * If station does not support short preamble 2443 * then we must enable use of Barker preamble. 2444 */ 2445 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) { 2446 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2447 "%s", "station needs long preamble"); 2448 ic->ic_flags |= IEEE80211_F_USEBARKER; 2449 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; 2450 } 2451 /* 2452 * If protection is configured and this is the first 2453 * indication we should use protection, enable it. 2454 */ 2455 if (ic->ic_protmode != IEEE80211_PROT_NONE && 2456 ic->ic_nonerpsta == 1 && 2457 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2458 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2459 "%s: enable use of protection\n", __func__); 2460 ic->ic_flags |= IEEE80211_F_USEPROT; 2461 ieee80211_notify_erp_locked(ic); 2462 } 2463 } else 2464 ni->ni_flags |= IEEE80211_NODE_ERP; 2465} 2466 2467void 2468ieee80211_node_join(struct ieee80211_node *ni, int resp) 2469{ 2470 struct ieee80211com *ic = ni->ni_ic; 2471 struct ieee80211vap *vap = ni->ni_vap; 2472 int newassoc; 2473 2474 if (ni->ni_associd == 0) { 2475 uint16_t aid; 2476 2477 KASSERT(vap->iv_aid_bitmap != NULL, ("no aid bitmap")); 2478 /* 2479 * It would be good to search the bitmap 2480 * more efficiently, but this will do for now. 2481 */ 2482 for (aid = 1; aid < vap->iv_max_aid; aid++) { 2483 if (!IEEE80211_AID_ISSET(vap, aid)) 2484 break; 2485 } 2486 if (aid >= vap->iv_max_aid) { 2487 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_TOOMANY); 2488 ieee80211_node_leave(ni); 2489 return; 2490 } 2491 ni->ni_associd = aid | 0xc000; 2492 ni->ni_jointime = time_uptime; 2493 IEEE80211_LOCK(ic); 2494 IEEE80211_AID_SET(vap, ni->ni_associd); 2495 vap->iv_sta_assoc++; 2496 ic->ic_sta_assoc++; 2497 2498 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2499 ieee80211_ht_node_join(ni); 2500 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2501 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2502 ieee80211_node_join_11g(ni); 2503 IEEE80211_UNLOCK(ic); 2504 2505 newassoc = 1; 2506 } else 2507 newassoc = 0; 2508 2509 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2510 "station associated at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s", 2511 IEEE80211_NODE_AID(ni), 2512 ic->ic_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long", 2513 ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long", 2514 ic->ic_flags & IEEE80211_F_USEPROT ? ", protection" : "", 2515 ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "", 2516 ni->ni_flags & IEEE80211_NODE_HT ? 2517 (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "", 2518 ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "", 2519 ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" : 2520 ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "", 2521 ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "", 2522 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ? 2523 ", fast-frames" : "", 2524 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ? 2525 ", turbo" : "" 2526 ); 2527 2528 ieee80211_node_setuptxparms(ni); 2529 ieee80211_ratectl_node_init(ni); 2530 /* give driver a chance to setup state like ni_txrate */ 2531 if (ic->ic_newassoc != NULL) 2532 ic->ic_newassoc(ni, newassoc); 2533 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_SUCCESS); 2534 /* tell the authenticator about new station */ 2535 if (vap->iv_auth->ia_node_join != NULL) 2536 vap->iv_auth->ia_node_join(ni); 2537 ieee80211_notify_node_join(ni, 2538 resp == IEEE80211_FC0_SUBTYPE_ASSOC_RESP); 2539} 2540 2541static void 2542disable_protection(struct ieee80211com *ic) 2543{ 2544 KASSERT(ic->ic_nonerpsta == 0 && 2545 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0, 2546 ("%d non ERP stations, flags 0x%x", ic->ic_nonerpsta, 2547 ic->ic_flags_ext)); 2548 2549 ic->ic_flags &= ~IEEE80211_F_USEPROT; 2550 /* XXX verify mode? */ 2551 if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) { 2552 ic->ic_flags |= IEEE80211_F_SHPREAMBLE; 2553 ic->ic_flags &= ~IEEE80211_F_USEBARKER; 2554 } 2555 ieee80211_notify_erp_locked(ic); 2556} 2557 2558/* 2559 * Handle a station leaving an 11g network. 2560 */ 2561static void 2562ieee80211_node_leave_11g(struct ieee80211_node *ni) 2563{ 2564 struct ieee80211com *ic = ni->ni_ic; 2565 2566 IEEE80211_LOCK_ASSERT(ic); 2567 2568 KASSERT(IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan), 2569 ("not in 11g, bss %u:0x%x", ic->ic_bsschan->ic_freq, 2570 ic->ic_bsschan->ic_flags)); 2571 2572 /* 2573 * If a long slot station do the slot time bookkeeping. 2574 */ 2575 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2576 KASSERT(ic->ic_longslotsta > 0, 2577 ("bogus long slot station count %d", ic->ic_longslotsta)); 2578 ic->ic_longslotsta--; 2579 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2580 "long slot time station leaves, count now %d", 2581 ic->ic_longslotsta); 2582 if (ic->ic_longslotsta == 0) { 2583 /* 2584 * Re-enable use of short slot time if supported 2585 * and not operating in IBSS mode (per spec). 2586 */ 2587 if ((ic->ic_caps & IEEE80211_C_SHSLOT) && 2588 ic->ic_opmode != IEEE80211_M_IBSS) { 2589 IEEE80211_DPRINTF(ni->ni_vap, 2590 IEEE80211_MSG_ASSOC, 2591 "%s: re-enable use of short slot time\n", 2592 __func__); 2593 ieee80211_set_shortslottime(ic, 1); 2594 } 2595 } 2596 } 2597 /* 2598 * If a non-ERP station do the protection-related bookkeeping. 2599 */ 2600 if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) { 2601 KASSERT(ic->ic_nonerpsta > 0, 2602 ("bogus non-ERP station count %d", ic->ic_nonerpsta)); 2603 ic->ic_nonerpsta--; 2604 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2605 "non-ERP station leaves, count now %d%s", ic->ic_nonerpsta, 2606 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) ? 2607 " (non-ERP sta present)" : ""); 2608 if (ic->ic_nonerpsta == 0 && 2609 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2610 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2611 "%s: disable use of protection\n", __func__); 2612 disable_protection(ic); 2613 } 2614 } 2615} 2616 2617/* 2618 * Time out presence of an overlapping bss with non-ERP 2619 * stations. When operating in hostap mode we listen for 2620 * beacons from other stations and if we identify a non-ERP 2621 * station is present we enable protection. To identify 2622 * when all non-ERP stations are gone we time out this 2623 * condition. 2624 */ 2625static void 2626ieee80211_erp_timeout(struct ieee80211com *ic) 2627{ 2628 2629 IEEE80211_LOCK_ASSERT(ic); 2630 2631 if ((ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) && 2632 time_after(ticks, ic->ic_lastnonerp + IEEE80211_NONERP_PRESENT_AGE)) { 2633#if 0 2634 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni, 2635 "%s", "age out non-ERP sta present on channel"); 2636#endif 2637 ic->ic_flags_ext &= ~IEEE80211_FEXT_NONERP_PR; 2638 if (ic->ic_nonerpsta == 0) 2639 disable_protection(ic); 2640 } 2641} 2642 2643/* 2644 * Handle bookkeeping for station deauthentication/disassociation 2645 * when operating as an ap. 2646 */ 2647void 2648ieee80211_node_leave(struct ieee80211_node *ni) 2649{ 2650 struct ieee80211com *ic = ni->ni_ic; 2651 struct ieee80211vap *vap = ni->ni_vap; 2652 struct ieee80211_node_table *nt = ni->ni_table; 2653 2654 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2655 "station with aid %d leaves", IEEE80211_NODE_AID(ni)); 2656 2657 KASSERT(vap->iv_opmode != IEEE80211_M_STA, 2658 ("unexpected operating mode %u", vap->iv_opmode)); 2659 /* 2660 * If node wasn't previously associated all 2661 * we need to do is reclaim the reference. 2662 */ 2663 /* XXX ibss mode bypasses 11g and notification */ 2664 if (ni->ni_associd == 0) 2665 goto done; 2666 /* 2667 * Tell the authenticator the station is leaving. 2668 * Note that we must do this before yanking the 2669 * association id as the authenticator uses the 2670 * associd to locate it's state block. 2671 */ 2672 if (vap->iv_auth->ia_node_leave != NULL) 2673 vap->iv_auth->ia_node_leave(ni); 2674 2675 IEEE80211_LOCK(ic); 2676 IEEE80211_AID_CLR(vap, ni->ni_associd); 2677 ni->ni_associd = 0; 2678 vap->iv_sta_assoc--; 2679 ic->ic_sta_assoc--; 2680 2681 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2682 ieee80211_ht_node_leave(ni); 2683 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2684 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2685 ieee80211_node_leave_11g(ni); 2686 IEEE80211_UNLOCK(ic); 2687 /* 2688 * Cleanup station state. In particular clear various 2689 * state that might otherwise be reused if the node 2690 * is reused before the reference count goes to zero 2691 * (and memory is reclaimed). 2692 */ 2693 ieee80211_sta_leave(ni); 2694done: 2695 /* 2696 * Remove the node from any table it's recorded in and 2697 * drop the caller's reference. Removal from the table 2698 * is important to insure the node is not reprocessed 2699 * for inactivity. 2700 */ 2701 if (nt != NULL) { 2702 IEEE80211_NODE_LOCK(nt); 2703 node_reclaim(nt, ni); 2704 IEEE80211_NODE_UNLOCK(nt); 2705 } else 2706 ieee80211_free_node(ni); 2707} 2708 2709struct rssiinfo { 2710 struct ieee80211vap *vap; 2711 int rssi_samples; 2712 uint32_t rssi_total; 2713}; 2714 2715static void 2716get_hostap_rssi(void *arg, struct ieee80211_node *ni) 2717{ 2718 struct rssiinfo *info = arg; 2719 struct ieee80211vap *vap = ni->ni_vap; 2720 int8_t rssi; 2721 2722 if (info->vap != vap) 2723 return; 2724 /* only associated stations */ 2725 if (ni->ni_associd == 0) 2726 return; 2727 rssi = vap->iv_ic->ic_node_getrssi(ni); 2728 if (rssi != 0) { 2729 info->rssi_samples++; 2730 info->rssi_total += rssi; 2731 } 2732} 2733 2734static void 2735get_adhoc_rssi(void *arg, struct ieee80211_node *ni) 2736{ 2737 struct rssiinfo *info = arg; 2738 struct ieee80211vap *vap = ni->ni_vap; 2739 int8_t rssi; 2740 2741 if (info->vap != vap) 2742 return; 2743 /* only neighbors */ 2744 /* XXX check bssid */ 2745 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 2746 return; 2747 rssi = vap->iv_ic->ic_node_getrssi(ni); 2748 if (rssi != 0) { 2749 info->rssi_samples++; 2750 info->rssi_total += rssi; 2751 } 2752} 2753 2754#ifdef IEEE80211_SUPPORT_MESH 2755static void 2756get_mesh_rssi(void *arg, struct ieee80211_node *ni) 2757{ 2758 struct rssiinfo *info = arg; 2759 struct ieee80211vap *vap = ni->ni_vap; 2760 int8_t rssi; 2761 2762 if (info->vap != vap) 2763 return; 2764 /* only neighbors that peered successfully */ 2765 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) 2766 return; 2767 rssi = vap->iv_ic->ic_node_getrssi(ni); 2768 if (rssi != 0) { 2769 info->rssi_samples++; 2770 info->rssi_total += rssi; 2771 } 2772} 2773#endif /* IEEE80211_SUPPORT_MESH */ 2774 2775int8_t 2776ieee80211_getrssi(struct ieee80211vap *vap) 2777{ 2778#define NZ(x) ((x) == 0 ? 1 : (x)) 2779 struct ieee80211com *ic = vap->iv_ic; 2780 struct rssiinfo info; 2781 2782 info.rssi_total = 0; 2783 info.rssi_samples = 0; 2784 info.vap = vap; 2785 switch (vap->iv_opmode) { 2786 case IEEE80211_M_IBSS: /* average of all ibss neighbors */ 2787 case IEEE80211_M_AHDEMO: /* average of all neighbors */ 2788 ieee80211_iterate_nodes(&ic->ic_sta, get_adhoc_rssi, &info); 2789 break; 2790 case IEEE80211_M_HOSTAP: /* average of all associated stations */ 2791 ieee80211_iterate_nodes(&ic->ic_sta, get_hostap_rssi, &info); 2792 break; 2793#ifdef IEEE80211_SUPPORT_MESH 2794 case IEEE80211_M_MBSS: /* average of all mesh neighbors */ 2795 ieee80211_iterate_nodes(&ic->ic_sta, get_mesh_rssi, &info); 2796 break; 2797#endif 2798 case IEEE80211_M_MONITOR: /* XXX */ 2799 case IEEE80211_M_STA: /* use stats from associated ap */ 2800 default: 2801 if (vap->iv_bss != NULL) 2802 info.rssi_total = ic->ic_node_getrssi(vap->iv_bss); 2803 info.rssi_samples = 1; 2804 break; 2805 } 2806 return info.rssi_total / NZ(info.rssi_samples); 2807#undef NZ 2808} 2809 2810void 2811ieee80211_getsignal(struct ieee80211vap *vap, int8_t *rssi, int8_t *noise) 2812{ 2813 2814 if (vap->iv_bss == NULL) /* NB: shouldn't happen */ 2815 return; 2816 vap->iv_ic->ic_node_getsignal(vap->iv_bss, rssi, noise); 2817 /* for non-station mode return avg'd rssi accounting */ 2818 if (vap->iv_opmode != IEEE80211_M_STA) 2819 *rssi = ieee80211_getrssi(vap); 2820} 2821