ieee80211_node.c revision 245928
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 245928 2013-01-26 00:37:54Z adrian $"); 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 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#define N(a) (sizeof(a)/sizeof(a[0])) 989 struct ieee80211vap *vap = ni->ni_vap; 990 struct ieee80211com *ic = ni->ni_ic; 991 int i; 992 993 /* NB: preserve ni_table */ 994 if (ni->ni_flags & IEEE80211_NODE_PWR_MGT) { 995 if (vap->iv_opmode != IEEE80211_M_STA) 996 vap->iv_ps_sta--; 997 ni->ni_flags &= ~IEEE80211_NODE_PWR_MGT; 998 IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni, 999 "power save mode off, %u sta's in ps mode", vap->iv_ps_sta); 1000 } 1001 /* 1002 * Cleanup any HT-related state. 1003 */ 1004 if (ni->ni_flags & IEEE80211_NODE_HT) 1005 ieee80211_ht_node_cleanup(ni); 1006#ifdef IEEE80211_SUPPORT_SUPERG 1007 else if (ni->ni_ath_flags & IEEE80211_NODE_ATH) 1008 ieee80211_ff_node_cleanup(ni); 1009#endif 1010#ifdef IEEE80211_SUPPORT_MESH 1011 /* 1012 * Cleanup any mesh-related state. 1013 */ 1014 if (vap->iv_opmode == IEEE80211_M_MBSS) 1015 ieee80211_mesh_node_cleanup(ni); 1016#endif 1017 /* 1018 * Clear any staging queue entries. 1019 */ 1020 ieee80211_ageq_drain_node(&ic->ic_stageq, ni); 1021 1022 /* 1023 * Clear AREF flag that marks the authorization refcnt bump 1024 * has happened. This is probably not needed as the node 1025 * should always be removed from the table so not found but 1026 * do it just in case. 1027 * Likewise clear the ASSOCID flag as these flags are intended 1028 * to be managed in tandem. 1029 */ 1030 ni->ni_flags &= ~(IEEE80211_NODE_AREF | IEEE80211_NODE_ASSOCID); 1031 1032 /* 1033 * Drain power save queue and, if needed, clear TIM. 1034 */ 1035 if (ieee80211_node_psq_drain(ni) != 0 && vap->iv_set_tim != NULL) 1036 vap->iv_set_tim(ni, 0); 1037 1038 ni->ni_associd = 0; 1039 if (ni->ni_challenge != NULL) { 1040 free(ni->ni_challenge, M_80211_NODE); 1041 ni->ni_challenge = NULL; 1042 } 1043 /* 1044 * Preserve SSID, WPA, and WME ie's so the bss node is 1045 * reusable during a re-auth/re-assoc state transition. 1046 * If we remove these data they will not be recreated 1047 * because they come from a probe-response or beacon frame 1048 * which cannot be expected prior to the association-response. 1049 * This should not be an issue when operating in other modes 1050 * as stations leaving always go through a full state transition 1051 * which will rebuild this state. 1052 * 1053 * XXX does this leave us open to inheriting old state? 1054 */ 1055 for (i = 0; i < N(ni->ni_rxfrag); i++) 1056 if (ni->ni_rxfrag[i] != NULL) { 1057 m_freem(ni->ni_rxfrag[i]); 1058 ni->ni_rxfrag[i] = NULL; 1059 } 1060 /* 1061 * Must be careful here to remove any key map entry w/o a LOR. 1062 */ 1063 ieee80211_node_delucastkey(ni); 1064#undef N 1065} 1066 1067static void 1068node_free(struct ieee80211_node *ni) 1069{ 1070 struct ieee80211com *ic = ni->ni_ic; 1071 1072 ieee80211_ratectl_node_deinit(ni); 1073 ic->ic_node_cleanup(ni); 1074 ieee80211_ies_cleanup(&ni->ni_ies); 1075 ieee80211_psq_cleanup(&ni->ni_psq); 1076 free(ni, M_80211_NODE); 1077} 1078 1079static void 1080node_age(struct ieee80211_node *ni) 1081{ 1082 struct ieee80211vap *vap = ni->ni_vap; 1083 1084 IEEE80211_NODE_LOCK_ASSERT(&vap->iv_ic->ic_sta); 1085 1086 /* 1087 * Age frames on the power save queue. 1088 */ 1089 if (ieee80211_node_psq_age(ni) != 0 && 1090 ni->ni_psq.psq_len == 0 && vap->iv_set_tim != NULL) 1091 vap->iv_set_tim(ni, 0); 1092 /* 1093 * Age out HT resources (e.g. frames on the 1094 * A-MPDU reorder queues). 1095 */ 1096 if (ni->ni_associd != 0 && (ni->ni_flags & IEEE80211_NODE_HT)) 1097 ieee80211_ht_node_age(ni); 1098} 1099 1100static int8_t 1101node_getrssi(const struct ieee80211_node *ni) 1102{ 1103 uint32_t avgrssi = ni->ni_avgrssi; 1104 int32_t rssi; 1105 1106 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) 1107 return 0; 1108 rssi = IEEE80211_RSSI_GET(avgrssi); 1109 return rssi < 0 ? 0 : rssi > 127 ? 127 : rssi; 1110} 1111 1112static void 1113node_getsignal(const struct ieee80211_node *ni, int8_t *rssi, int8_t *noise) 1114{ 1115 *rssi = node_getrssi(ni); 1116 *noise = ni->ni_noise; 1117} 1118 1119static void 1120node_getmimoinfo(const struct ieee80211_node *ni, 1121 struct ieee80211_mimo_info *info) 1122{ 1123 int i; 1124 uint32_t avgrssi; 1125 int32_t rssi; 1126 1127 bzero(info, sizeof(*info)); 1128 1129 for (i = 0; i < ni->ni_mimo_chains; i++) { 1130 avgrssi = ni->ni_mimo_rssi_ctl[i]; 1131 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) { 1132 info->rssi[i] = 0; 1133 } else { 1134 rssi = IEEE80211_RSSI_GET(avgrssi); 1135 info->rssi[i] = rssi < 0 ? 0 : rssi > 127 ? 127 : rssi; 1136 } 1137 info->noise[i] = ni->ni_mimo_noise_ctl[i]; 1138 } 1139 1140 /* XXX ext radios? */ 1141 1142 /* XXX EVM? */ 1143} 1144 1145struct ieee80211_node * 1146ieee80211_alloc_node(struct ieee80211_node_table *nt, 1147 struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1148{ 1149 struct ieee80211com *ic = nt->nt_ic; 1150 struct ieee80211_node *ni; 1151 int hash; 1152 1153 ni = ic->ic_node_alloc(vap, macaddr); 1154 if (ni == NULL) { 1155 vap->iv_stats.is_rx_nodealloc++; 1156 return NULL; 1157 } 1158 1159 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1160 "%s %p<%s> in %s table\n", __func__, ni, 1161 ether_sprintf(macaddr), nt->nt_name); 1162 1163 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1164 hash = IEEE80211_NODE_HASH(ic, macaddr); 1165 ieee80211_node_initref(ni); /* mark referenced */ 1166 ni->ni_chan = IEEE80211_CHAN_ANYC; 1167 ni->ni_authmode = IEEE80211_AUTH_OPEN; 1168 ni->ni_txpower = ic->ic_txpowlimit; /* max power */ 1169 ni->ni_txparms = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)]; 1170 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE); 1171 ni->ni_avgrssi = IEEE80211_RSSI_DUMMY_MARKER; 1172 ni->ni_inact_reload = nt->nt_inact_init; 1173 ni->ni_inact = ni->ni_inact_reload; 1174 ni->ni_ath_defkeyix = 0x7fff; 1175 ieee80211_psq_init(&ni->ni_psq, "unknown"); 1176#ifdef IEEE80211_SUPPORT_MESH 1177 if (vap->iv_opmode == IEEE80211_M_MBSS) 1178 ieee80211_mesh_node_init(vap, ni); 1179#endif 1180 IEEE80211_NODE_LOCK(nt); 1181 TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list); 1182 LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash); 1183 ni->ni_table = nt; 1184 ni->ni_vap = vap; 1185 ni->ni_ic = ic; 1186 IEEE80211_NODE_UNLOCK(nt); 1187 1188 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 1189 "%s: inact_reload %u", __func__, ni->ni_inact_reload); 1190 1191 ieee80211_ratectl_node_init(ni); 1192 1193 return ni; 1194} 1195 1196/* 1197 * Craft a temporary node suitable for sending a management frame 1198 * to the specified station. We craft only as much state as we 1199 * need to do the work since the node will be immediately reclaimed 1200 * once the send completes. 1201 */ 1202struct ieee80211_node * 1203ieee80211_tmp_node(struct ieee80211vap *vap, 1204 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1205{ 1206 struct ieee80211com *ic = vap->iv_ic; 1207 struct ieee80211_node *ni; 1208 1209 ni = ic->ic_node_alloc(vap, macaddr); 1210 if (ni != NULL) { 1211 struct ieee80211_node *bss = vap->iv_bss; 1212 1213 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1214 "%s %p<%s>\n", __func__, ni, ether_sprintf(macaddr)); 1215 1216 ni->ni_table = NULL; /* NB: pedantic */ 1217 ni->ni_ic = ic; /* NB: needed to set channel */ 1218 ni->ni_vap = vap; 1219 1220 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1221 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1222 ieee80211_node_initref(ni); /* mark referenced */ 1223 /* NB: required by ieee80211_fix_rate */ 1224 ieee80211_node_set_chan(ni, bss->ni_chan); 1225 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, 1226 IEEE80211_KEYIX_NONE); 1227 ni->ni_txpower = bss->ni_txpower; 1228 /* XXX optimize away */ 1229 ieee80211_psq_init(&ni->ni_psq, "unknown"); 1230 1231 ieee80211_ratectl_node_init(ni); 1232 } else { 1233 /* XXX msg */ 1234 vap->iv_stats.is_rx_nodealloc++; 1235 } 1236 return ni; 1237} 1238 1239struct ieee80211_node * 1240ieee80211_dup_bss(struct ieee80211vap *vap, 1241 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1242{ 1243 struct ieee80211com *ic = vap->iv_ic; 1244 struct ieee80211_node *ni; 1245 1246 ni = ieee80211_alloc_node(&ic->ic_sta, vap, macaddr); 1247 if (ni != NULL) { 1248 struct ieee80211_node *bss = vap->iv_bss; 1249 /* 1250 * Inherit from iv_bss. 1251 */ 1252 copy_bss(ni, bss); 1253 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1254 ieee80211_node_set_chan(ni, bss->ni_chan); 1255 } 1256 return ni; 1257} 1258 1259/* 1260 * Create a bss node for a legacy WDS vap. The far end does 1261 * not associate so we just create create a new node and 1262 * simulate an association. The caller is responsible for 1263 * installing the node as the bss node and handling any further 1264 * setup work like authorizing the port. 1265 */ 1266struct ieee80211_node * 1267ieee80211_node_create_wds(struct ieee80211vap *vap, 1268 const uint8_t bssid[IEEE80211_ADDR_LEN], struct ieee80211_channel *chan) 1269{ 1270 struct ieee80211com *ic = vap->iv_ic; 1271 struct ieee80211_node *ni; 1272 1273 /* XXX check if node already in sta table? */ 1274 ni = ieee80211_alloc_node(&ic->ic_sta, vap, bssid); 1275 if (ni != NULL) { 1276 ni->ni_wdsvap = vap; 1277 IEEE80211_ADDR_COPY(ni->ni_bssid, bssid); 1278 /* 1279 * Inherit any manually configured settings. 1280 */ 1281 copy_bss(ni, vap->iv_bss); 1282 ieee80211_node_set_chan(ni, chan); 1283 /* NB: propagate ssid so available to WPA supplicant */ 1284 ni->ni_esslen = vap->iv_des_ssid[0].len; 1285 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen); 1286 /* NB: no associd for peer */ 1287 /* 1288 * There are no management frames to use to 1289 * discover neighbor capabilities, so blindly 1290 * propagate the local configuration. 1291 */ 1292 if (vap->iv_flags & IEEE80211_F_WME) 1293 ni->ni_flags |= IEEE80211_NODE_QOS; 1294#ifdef IEEE80211_SUPPORT_SUPERG 1295 if (vap->iv_flags & IEEE80211_F_FF) 1296 ni->ni_flags |= IEEE80211_NODE_FF; 1297#endif 1298 if ((ic->ic_htcaps & IEEE80211_HTC_HT) && 1299 (vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1300 /* 1301 * Device is HT-capable and HT is enabled for 1302 * the vap; setup HT operation. On return 1303 * ni_chan will be adjusted to an HT channel. 1304 */ 1305 ieee80211_ht_wds_init(ni); 1306 } else { 1307 struct ieee80211_channel *c = ni->ni_chan; 1308 /* 1309 * Force a legacy channel to be used. 1310 */ 1311 c = ieee80211_find_channel(ic, 1312 c->ic_freq, c->ic_flags &~ IEEE80211_CHAN_HT); 1313 KASSERT(c != NULL, ("no legacy channel, %u/%x", 1314 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags)); 1315 ni->ni_chan = c; 1316 } 1317 } 1318 return ni; 1319} 1320 1321struct ieee80211_node * 1322#ifdef IEEE80211_DEBUG_REFCNT 1323ieee80211_find_node_locked_debug(struct ieee80211_node_table *nt, 1324 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1325#else 1326ieee80211_find_node_locked(struct ieee80211_node_table *nt, 1327 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1328#endif 1329{ 1330 struct ieee80211_node *ni; 1331 int hash; 1332 1333 IEEE80211_NODE_LOCK_ASSERT(nt); 1334 1335 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr); 1336 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1337 if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1338 ieee80211_ref_node(ni); /* mark referenced */ 1339#ifdef IEEE80211_DEBUG_REFCNT 1340 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1341 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1342 func, line, 1343 ni, ether_sprintf(ni->ni_macaddr), 1344 ieee80211_node_refcnt(ni)); 1345#endif 1346 return ni; 1347 } 1348 } 1349 return NULL; 1350} 1351 1352struct ieee80211_node * 1353#ifdef IEEE80211_DEBUG_REFCNT 1354ieee80211_find_node_debug(struct ieee80211_node_table *nt, 1355 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1356#else 1357ieee80211_find_node(struct ieee80211_node_table *nt, 1358 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1359#endif 1360{ 1361 struct ieee80211_node *ni; 1362 1363 IEEE80211_NODE_LOCK(nt); 1364 ni = ieee80211_find_node_locked(nt, macaddr); 1365 IEEE80211_NODE_UNLOCK(nt); 1366 return ni; 1367} 1368 1369struct ieee80211_node * 1370#ifdef IEEE80211_DEBUG_REFCNT 1371ieee80211_find_vap_node_locked_debug(struct ieee80211_node_table *nt, 1372 const struct ieee80211vap *vap, 1373 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1374#else 1375ieee80211_find_vap_node_locked(struct ieee80211_node_table *nt, 1376 const struct ieee80211vap *vap, 1377 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1378#endif 1379{ 1380 struct ieee80211_node *ni; 1381 int hash; 1382 1383 IEEE80211_NODE_LOCK_ASSERT(nt); 1384 1385 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr); 1386 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1387 if (ni->ni_vap == vap && 1388 IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1389 ieee80211_ref_node(ni); /* mark referenced */ 1390#ifdef IEEE80211_DEBUG_REFCNT 1391 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1392 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1393 func, line, 1394 ni, ether_sprintf(ni->ni_macaddr), 1395 ieee80211_node_refcnt(ni)); 1396#endif 1397 return ni; 1398 } 1399 } 1400 return NULL; 1401} 1402 1403struct ieee80211_node * 1404#ifdef IEEE80211_DEBUG_REFCNT 1405ieee80211_find_vap_node_debug(struct ieee80211_node_table *nt, 1406 const struct ieee80211vap *vap, 1407 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1408#else 1409ieee80211_find_vap_node(struct ieee80211_node_table *nt, 1410 const struct ieee80211vap *vap, 1411 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1412#endif 1413{ 1414 struct ieee80211_node *ni; 1415 1416 IEEE80211_NODE_LOCK(nt); 1417 ni = ieee80211_find_vap_node_locked(nt, vap, macaddr); 1418 IEEE80211_NODE_UNLOCK(nt); 1419 return ni; 1420} 1421 1422/* 1423 * Fake up a node; this handles node discovery in adhoc mode. 1424 * Note that for the driver's benefit we we treat this like 1425 * an association so the driver has an opportunity to setup 1426 * it's private state. 1427 */ 1428struct ieee80211_node * 1429ieee80211_fakeup_adhoc_node(struct ieee80211vap *vap, 1430 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1431{ 1432 struct ieee80211_node *ni; 1433 1434 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE | IEEE80211_MSG_ASSOC, 1435 "%s: mac<%s>\n", __func__, ether_sprintf(macaddr)); 1436 ni = ieee80211_dup_bss(vap, macaddr); 1437 if (ni != NULL) { 1438 struct ieee80211com *ic = vap->iv_ic; 1439 1440 /* XXX no rate negotiation; just dup */ 1441 ni->ni_rates = vap->iv_bss->ni_rates; 1442 if (ieee80211_iserp_rateset(&ni->ni_rates)) 1443 ni->ni_flags |= IEEE80211_NODE_ERP; 1444 if (vap->iv_opmode == IEEE80211_M_AHDEMO) { 1445 /* 1446 * In adhoc demo mode there are no management 1447 * frames to use to discover neighbor capabilities, 1448 * so blindly propagate the local configuration 1449 * so we can do interesting things (e.g. use 1450 * WME to disable ACK's). 1451 */ 1452 if (vap->iv_flags & IEEE80211_F_WME) 1453 ni->ni_flags |= IEEE80211_NODE_QOS; 1454#ifdef IEEE80211_SUPPORT_SUPERG 1455 if (vap->iv_flags & IEEE80211_F_FF) 1456 ni->ni_flags |= IEEE80211_NODE_FF; 1457#endif 1458 } 1459 ieee80211_node_setuptxparms(ni); 1460 ieee80211_ratectl_node_init(ni); 1461 if (ic->ic_newassoc != NULL) 1462 ic->ic_newassoc(ni, 1); 1463 /* XXX not right for 802.1x/WPA */ 1464 ieee80211_node_authorize(ni); 1465 } 1466 return ni; 1467} 1468 1469void 1470ieee80211_init_neighbor(struct ieee80211_node *ni, 1471 const struct ieee80211_frame *wh, 1472 const struct ieee80211_scanparams *sp) 1473{ 1474 int do_ht_setup = 0; 1475 1476 ni->ni_esslen = sp->ssid[1]; 1477 memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]); 1478 IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3); 1479 memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp)); 1480 ni->ni_intval = sp->bintval; 1481 ni->ni_capinfo = sp->capinfo; 1482 ni->ni_chan = ni->ni_ic->ic_curchan; 1483 ni->ni_fhdwell = sp->fhdwell; 1484 ni->ni_fhindex = sp->fhindex; 1485 ni->ni_erp = sp->erp; 1486 ni->ni_timoff = sp->timoff; 1487#ifdef IEEE80211_SUPPORT_MESH 1488 if (ni->ni_vap->iv_opmode == IEEE80211_M_MBSS) 1489 ieee80211_mesh_init_neighbor(ni, wh, sp); 1490#endif 1491 if (ieee80211_ies_init(&ni->ni_ies, sp->ies, sp->ies_len)) { 1492 ieee80211_ies_expand(&ni->ni_ies); 1493 if (ni->ni_ies.wme_ie != NULL) 1494 ni->ni_flags |= IEEE80211_NODE_QOS; 1495 else 1496 ni->ni_flags &= ~IEEE80211_NODE_QOS; 1497#ifdef IEEE80211_SUPPORT_SUPERG 1498 if (ni->ni_ies.ath_ie != NULL) 1499 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 1500#endif 1501 if (ni->ni_ies.htcap_ie != NULL) 1502 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie); 1503 if (ni->ni_ies.htinfo_ie != NULL) 1504 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie); 1505 1506 if ((ni->ni_ies.htcap_ie != NULL) && 1507 (ni->ni_ies.htinfo_ie != NULL) && 1508 (ni->ni_vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1509 do_ht_setup = 1; 1510 } 1511 } 1512 1513 /* NB: must be after ni_chan is setup */ 1514 ieee80211_setup_rates(ni, sp->rates, sp->xrates, 1515 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 1516 IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 1517 1518 /* 1519 * If the neighbor is HT compatible, flip that on. 1520 */ 1521 if (do_ht_setup) { 1522 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 1523 "%s: doing HT setup\n", __func__); 1524 ieee80211_ht_node_init(ni); 1525 ieee80211_ht_updateparams(ni, 1526 ni->ni_ies.htcap_ie, 1527 ni->ni_ies.htinfo_ie); 1528 ieee80211_setup_htrates(ni, 1529 ni->ni_ies.htcap_ie, 1530 IEEE80211_F_JOIN | IEEE80211_F_DOBRS); 1531 ieee80211_setup_basic_htrates(ni, 1532 ni->ni_ies.htinfo_ie); 1533 ieee80211_node_setuptxparms(ni); 1534 ieee80211_ratectl_node_init(ni); 1535 } 1536} 1537 1538/* 1539 * Do node discovery in adhoc mode on receipt of a beacon 1540 * or probe response frame. Note that for the driver's 1541 * benefit we we treat this like an association so the 1542 * driver has an opportunity to setup it's private state. 1543 */ 1544struct ieee80211_node * 1545ieee80211_add_neighbor(struct ieee80211vap *vap, 1546 const struct ieee80211_frame *wh, 1547 const struct ieee80211_scanparams *sp) 1548{ 1549 struct ieee80211_node *ni; 1550 1551 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 1552 "%s: mac<%s>\n", __func__, ether_sprintf(wh->i_addr2)); 1553 ni = ieee80211_dup_bss(vap, wh->i_addr2);/* XXX alloc_node? */ 1554 if (ni != NULL) { 1555 struct ieee80211com *ic = vap->iv_ic; 1556 1557 ieee80211_init_neighbor(ni, wh, sp); 1558 if (ieee80211_iserp_rateset(&ni->ni_rates)) 1559 ni->ni_flags |= IEEE80211_NODE_ERP; 1560 ieee80211_node_setuptxparms(ni); 1561 ieee80211_ratectl_node_init(ni); 1562 if (ic->ic_newassoc != NULL) 1563 ic->ic_newassoc(ni, 1); 1564 /* XXX not right for 802.1x/WPA */ 1565 ieee80211_node_authorize(ni); 1566 } 1567 return ni; 1568} 1569 1570#define IS_PROBEREQ(wh) \ 1571 ((wh->i_fc[0] & (IEEE80211_FC0_TYPE_MASK|IEEE80211_FC0_SUBTYPE_MASK)) \ 1572 == (IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ)) 1573#define IS_BCAST_PROBEREQ(wh) \ 1574 (IS_PROBEREQ(wh) && IEEE80211_IS_MULTICAST( \ 1575 ((const struct ieee80211_frame *)(wh))->i_addr3)) 1576 1577static __inline struct ieee80211_node * 1578_find_rxnode(struct ieee80211_node_table *nt, 1579 const struct ieee80211_frame_min *wh) 1580{ 1581 if (IS_BCAST_PROBEREQ(wh)) 1582 return NULL; /* spam bcast probe req to all vap's */ 1583 return ieee80211_find_node_locked(nt, wh->i_addr2); 1584} 1585 1586/* 1587 * Locate the node for sender, track state, and then pass the 1588 * (referenced) node up to the 802.11 layer for its use. Note 1589 * we can return NULL if the sender is not in the table. 1590 */ 1591struct ieee80211_node * 1592#ifdef IEEE80211_DEBUG_REFCNT 1593ieee80211_find_rxnode_debug(struct ieee80211com *ic, 1594 const struct ieee80211_frame_min *wh, const char *func, int line) 1595#else 1596ieee80211_find_rxnode(struct ieee80211com *ic, 1597 const struct ieee80211_frame_min *wh) 1598#endif 1599{ 1600 struct ieee80211_node_table *nt; 1601 struct ieee80211_node *ni; 1602 1603 nt = &ic->ic_sta; 1604 IEEE80211_NODE_LOCK(nt); 1605 ni = _find_rxnode(nt, wh); 1606 IEEE80211_NODE_UNLOCK(nt); 1607 1608 return ni; 1609} 1610 1611/* 1612 * Like ieee80211_find_rxnode but use the supplied h/w 1613 * key index as a hint to locate the node in the key 1614 * mapping table. If an entry is present at the key 1615 * index we return it; otherwise do a normal lookup and 1616 * update the mapping table if the station has a unicast 1617 * key assigned to it. 1618 */ 1619struct ieee80211_node * 1620#ifdef IEEE80211_DEBUG_REFCNT 1621ieee80211_find_rxnode_withkey_debug(struct ieee80211com *ic, 1622 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix, 1623 const char *func, int line) 1624#else 1625ieee80211_find_rxnode_withkey(struct ieee80211com *ic, 1626 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix) 1627#endif 1628{ 1629 struct ieee80211_node_table *nt; 1630 struct ieee80211_node *ni; 1631 1632 nt = &ic->ic_sta; 1633 IEEE80211_NODE_LOCK(nt); 1634 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) 1635 ni = nt->nt_keyixmap[keyix]; 1636 else 1637 ni = NULL; 1638 if (ni == NULL) { 1639 ni = _find_rxnode(nt, wh); 1640 if (ni != NULL && nt->nt_keyixmap != NULL) { 1641 /* 1642 * If the station has a unicast key cache slot 1643 * assigned update the key->node mapping table. 1644 */ 1645 keyix = ni->ni_ucastkey.wk_rxkeyix; 1646 /* XXX can keyixmap[keyix] != NULL? */ 1647 if (keyix < nt->nt_keyixmax && 1648 nt->nt_keyixmap[keyix] == NULL) { 1649 IEEE80211_DPRINTF(ni->ni_vap, 1650 IEEE80211_MSG_NODE, 1651 "%s: add key map entry %p<%s> refcnt %d\n", 1652 __func__, ni, ether_sprintf(ni->ni_macaddr), 1653 ieee80211_node_refcnt(ni)+1); 1654 nt->nt_keyixmap[keyix] = ieee80211_ref_node(ni); 1655 } 1656 } 1657 } else { 1658 if (IS_BCAST_PROBEREQ(wh)) 1659 ni = NULL; /* spam bcast probe req to all vap's */ 1660 else 1661 ieee80211_ref_node(ni); 1662 } 1663 IEEE80211_NODE_UNLOCK(nt); 1664 1665 return ni; 1666} 1667#undef IS_BCAST_PROBEREQ 1668#undef IS_PROBEREQ 1669 1670/* 1671 * Return a reference to the appropriate node for sending 1672 * a data frame. This handles node discovery in adhoc networks. 1673 */ 1674struct ieee80211_node * 1675#ifdef IEEE80211_DEBUG_REFCNT 1676ieee80211_find_txnode_debug(struct ieee80211vap *vap, 1677 const uint8_t macaddr[IEEE80211_ADDR_LEN], 1678 const char *func, int line) 1679#else 1680ieee80211_find_txnode(struct ieee80211vap *vap, 1681 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1682#endif 1683{ 1684 struct ieee80211_node_table *nt = &vap->iv_ic->ic_sta; 1685 struct ieee80211_node *ni; 1686 1687 /* 1688 * The destination address should be in the node table 1689 * unless this is a multicast/broadcast frame. We can 1690 * also optimize station mode operation, all frames go 1691 * to the bss node. 1692 */ 1693 /* XXX can't hold lock across dup_bss 'cuz of recursive locking */ 1694 IEEE80211_NODE_LOCK(nt); 1695 if (vap->iv_opmode == IEEE80211_M_STA || 1696 vap->iv_opmode == IEEE80211_M_WDS || 1697 IEEE80211_IS_MULTICAST(macaddr)) 1698 ni = ieee80211_ref_node(vap->iv_bss); 1699 else 1700 ni = ieee80211_find_node_locked(nt, macaddr); 1701 IEEE80211_NODE_UNLOCK(nt); 1702 1703 if (ni == NULL) { 1704 if (vap->iv_opmode == IEEE80211_M_IBSS || 1705 vap->iv_opmode == IEEE80211_M_AHDEMO) { 1706 /* 1707 * In adhoc mode cons up a node for the destination. 1708 * Note that we need an additional reference for the 1709 * caller to be consistent with 1710 * ieee80211_find_node_locked. 1711 */ 1712 ni = ieee80211_fakeup_adhoc_node(vap, macaddr); 1713 if (ni != NULL) 1714 (void) ieee80211_ref_node(ni); 1715 } else { 1716 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, macaddr, 1717 "no node, discard frame (%s)", __func__); 1718 vap->iv_stats.is_tx_nonode++; 1719 } 1720 } 1721 return ni; 1722} 1723 1724static void 1725_ieee80211_free_node(struct ieee80211_node *ni) 1726{ 1727 struct ieee80211_node_table *nt = ni->ni_table; 1728 1729 /* 1730 * NB: careful about referencing the vap as it may be 1731 * gone if the last reference was held by a driver. 1732 * We know the com will always be present so it's safe 1733 * to use ni_ic below to reclaim resources. 1734 */ 1735#if 0 1736 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1737 "%s %p<%s> in %s table\n", __func__, ni, 1738 ether_sprintf(ni->ni_macaddr), 1739 nt != NULL ? nt->nt_name : "<gone>"); 1740#endif 1741 if (ni->ni_associd != 0) { 1742 struct ieee80211vap *vap = ni->ni_vap; 1743 if (vap->iv_aid_bitmap != NULL) 1744 IEEE80211_AID_CLR(vap, ni->ni_associd); 1745 } 1746 if (nt != NULL) { 1747 TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1748 LIST_REMOVE(ni, ni_hash); 1749 } 1750 ni->ni_ic->ic_node_free(ni); 1751} 1752 1753void 1754#ifdef IEEE80211_DEBUG_REFCNT 1755ieee80211_free_node_debug(struct ieee80211_node *ni, const char *func, int line) 1756#else 1757ieee80211_free_node(struct ieee80211_node *ni) 1758#endif 1759{ 1760 struct ieee80211_node_table *nt = ni->ni_table; 1761 1762#ifdef IEEE80211_DEBUG_REFCNT 1763 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1764 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni, 1765 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1); 1766#endif 1767 if (nt != NULL) { 1768 IEEE80211_NODE_LOCK(nt); 1769 if (ieee80211_node_dectestref(ni)) { 1770 /* 1771 * Last reference, reclaim state. 1772 */ 1773 _ieee80211_free_node(ni); 1774 } else if (ieee80211_node_refcnt(ni) == 1 && 1775 nt->nt_keyixmap != NULL) { 1776 ieee80211_keyix keyix; 1777 /* 1778 * Check for a last reference in the key mapping table. 1779 */ 1780 keyix = ni->ni_ucastkey.wk_rxkeyix; 1781 if (keyix < nt->nt_keyixmax && 1782 nt->nt_keyixmap[keyix] == ni) { 1783 IEEE80211_DPRINTF(ni->ni_vap, 1784 IEEE80211_MSG_NODE, 1785 "%s: %p<%s> clear key map entry", __func__, 1786 ni, ether_sprintf(ni->ni_macaddr)); 1787 nt->nt_keyixmap[keyix] = NULL; 1788 ieee80211_node_decref(ni); /* XXX needed? */ 1789 _ieee80211_free_node(ni); 1790 } 1791 } 1792 IEEE80211_NODE_UNLOCK(nt); 1793 } else { 1794 if (ieee80211_node_dectestref(ni)) 1795 _ieee80211_free_node(ni); 1796 } 1797} 1798 1799/* 1800 * Reclaim a unicast key and clear any key cache state. 1801 */ 1802int 1803ieee80211_node_delucastkey(struct ieee80211_node *ni) 1804{ 1805 struct ieee80211com *ic = ni->ni_ic; 1806 struct ieee80211_node_table *nt = &ic->ic_sta; 1807 struct ieee80211_node *nikey; 1808 ieee80211_keyix keyix; 1809 int isowned, status; 1810 1811 /* 1812 * NB: We must beware of LOR here; deleting the key 1813 * can cause the crypto layer to block traffic updates 1814 * which can generate a LOR against the node table lock; 1815 * grab it here and stash the key index for our use below. 1816 * 1817 * Must also beware of recursion on the node table lock. 1818 * When called from node_cleanup we may already have 1819 * the node table lock held. Unfortunately there's no 1820 * way to separate out this path so we must do this 1821 * conditionally. 1822 */ 1823 isowned = IEEE80211_NODE_IS_LOCKED(nt); 1824 if (!isowned) 1825 IEEE80211_NODE_LOCK(nt); 1826 nikey = NULL; 1827 status = 1; /* NB: success */ 1828 if (ni->ni_ucastkey.wk_keyix != IEEE80211_KEYIX_NONE) { 1829 keyix = ni->ni_ucastkey.wk_rxkeyix; 1830 status = ieee80211_crypto_delkey(ni->ni_vap, &ni->ni_ucastkey); 1831 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) { 1832 nikey = nt->nt_keyixmap[keyix]; 1833 nt->nt_keyixmap[keyix] = NULL; 1834 } 1835 } 1836 if (!isowned) 1837 IEEE80211_NODE_UNLOCK(nt); 1838 1839 if (nikey != NULL) { 1840 KASSERT(nikey == ni, 1841 ("key map out of sync, ni %p nikey %p", ni, nikey)); 1842 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1843 "%s: delete key map entry %p<%s> refcnt %d\n", 1844 __func__, ni, ether_sprintf(ni->ni_macaddr), 1845 ieee80211_node_refcnt(ni)-1); 1846 ieee80211_free_node(ni); 1847 } 1848 return status; 1849} 1850 1851/* 1852 * Reclaim a node. If this is the last reference count then 1853 * do the normal free work. Otherwise remove it from the node 1854 * table and mark it gone by clearing the back-reference. 1855 */ 1856static void 1857node_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 1858{ 1859 ieee80211_keyix keyix; 1860 1861 IEEE80211_NODE_LOCK_ASSERT(nt); 1862 1863 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1864 "%s: remove %p<%s> from %s table, refcnt %d\n", 1865 __func__, ni, ether_sprintf(ni->ni_macaddr), 1866 nt->nt_name, ieee80211_node_refcnt(ni)-1); 1867 /* 1868 * Clear any entry in the unicast key mapping table. 1869 * We need to do it here so rx lookups don't find it 1870 * in the mapping table even if it's not in the hash 1871 * table. We cannot depend on the mapping table entry 1872 * being cleared because the node may not be free'd. 1873 */ 1874 keyix = ni->ni_ucastkey.wk_rxkeyix; 1875 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax && 1876 nt->nt_keyixmap[keyix] == ni) { 1877 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1878 "%s: %p<%s> clear key map entry %u\n", 1879 __func__, ni, ether_sprintf(ni->ni_macaddr), keyix); 1880 nt->nt_keyixmap[keyix] = NULL; 1881 ieee80211_node_decref(ni); /* NB: don't need free */ 1882 } 1883 if (!ieee80211_node_dectestref(ni)) { 1884 /* 1885 * Other references are present, just remove the 1886 * node from the table so it cannot be found. When 1887 * the references are dropped storage will be 1888 * reclaimed. 1889 */ 1890 TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1891 LIST_REMOVE(ni, ni_hash); 1892 ni->ni_table = NULL; /* clear reference */ 1893 } else 1894 _ieee80211_free_node(ni); 1895} 1896 1897/* 1898 * Node table support. 1899 */ 1900 1901static void 1902ieee80211_node_table_init(struct ieee80211com *ic, 1903 struct ieee80211_node_table *nt, 1904 const char *name, int inact, int keyixmax) 1905{ 1906 struct ifnet *ifp = ic->ic_ifp; 1907 1908 nt->nt_ic = ic; 1909 IEEE80211_NODE_LOCK_INIT(nt, ifp->if_xname); 1910 IEEE80211_NODE_ITERATE_LOCK_INIT(nt, ifp->if_xname); 1911 TAILQ_INIT(&nt->nt_node); 1912 nt->nt_name = name; 1913 nt->nt_scangen = 1; 1914 nt->nt_inact_init = inact; 1915 nt->nt_keyixmax = keyixmax; 1916 if (nt->nt_keyixmax > 0) { 1917 nt->nt_keyixmap = (struct ieee80211_node **) malloc( 1918 keyixmax * sizeof(struct ieee80211_node *), 1919 M_80211_NODE, M_NOWAIT | M_ZERO); 1920 if (nt->nt_keyixmap == NULL) 1921 if_printf(ic->ic_ifp, 1922 "Cannot allocate key index map with %u entries\n", 1923 keyixmax); 1924 } else 1925 nt->nt_keyixmap = NULL; 1926} 1927 1928static void 1929ieee80211_node_table_reset(struct ieee80211_node_table *nt, 1930 struct ieee80211vap *match) 1931{ 1932 struct ieee80211_node *ni, *next; 1933 1934 IEEE80211_NODE_LOCK(nt); 1935 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) { 1936 if (match != NULL && ni->ni_vap != match) 1937 continue; 1938 /* XXX can this happen? if so need's work */ 1939 if (ni->ni_associd != 0) { 1940 struct ieee80211vap *vap = ni->ni_vap; 1941 1942 if (vap->iv_auth->ia_node_leave != NULL) 1943 vap->iv_auth->ia_node_leave(ni); 1944 if (vap->iv_aid_bitmap != NULL) 1945 IEEE80211_AID_CLR(vap, ni->ni_associd); 1946 } 1947 ni->ni_wdsvap = NULL; /* clear reference */ 1948 node_reclaim(nt, ni); 1949 } 1950 if (match != NULL && match->iv_opmode == IEEE80211_M_WDS) { 1951 /* 1952 * Make a separate pass to clear references to this vap 1953 * held by DWDS entries. They will not be matched above 1954 * because ni_vap will point to the ap vap but we still 1955 * need to clear ni_wdsvap when the WDS vap is destroyed 1956 * and/or reset. 1957 */ 1958 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) 1959 if (ni->ni_wdsvap == match) 1960 ni->ni_wdsvap = NULL; 1961 } 1962 IEEE80211_NODE_UNLOCK(nt); 1963} 1964 1965static void 1966ieee80211_node_table_cleanup(struct ieee80211_node_table *nt) 1967{ 1968 ieee80211_node_table_reset(nt, NULL); 1969 if (nt->nt_keyixmap != NULL) { 1970#ifdef DIAGNOSTIC 1971 /* XXX verify all entries are NULL */ 1972 int i; 1973 for (i = 0; i < nt->nt_keyixmax; i++) 1974 if (nt->nt_keyixmap[i] != NULL) 1975 printf("%s: %s[%u] still active\n", __func__, 1976 nt->nt_name, i); 1977#endif 1978 free(nt->nt_keyixmap, M_80211_NODE); 1979 nt->nt_keyixmap = NULL; 1980 } 1981 IEEE80211_NODE_ITERATE_LOCK_DESTROY(nt); 1982 IEEE80211_NODE_LOCK_DESTROY(nt); 1983} 1984 1985/* 1986 * Timeout inactive stations and do related housekeeping. 1987 * Note that we cannot hold the node lock while sending a 1988 * frame as this would lead to a LOR. Instead we use a 1989 * generation number to mark nodes that we've scanned and 1990 * drop the lock and restart a scan if we have to time out 1991 * a node. Since we are single-threaded by virtue of 1992 * controlling the inactivity timer we can be sure this will 1993 * process each node only once. 1994 */ 1995static void 1996ieee80211_timeout_stations(struct ieee80211com *ic) 1997{ 1998 struct ieee80211_node_table *nt = &ic->ic_sta; 1999 struct ieee80211vap *vap; 2000 struct ieee80211_node *ni; 2001 int gen = 0; 2002 2003 IEEE80211_NODE_ITERATE_LOCK(nt); 2004 gen = ++nt->nt_scangen; 2005restart: 2006 IEEE80211_NODE_LOCK(nt); 2007 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2008 if (ni->ni_scangen == gen) /* previously handled */ 2009 continue; 2010 ni->ni_scangen = gen; 2011 /* 2012 * Ignore entries for which have yet to receive an 2013 * authentication frame. These are transient and 2014 * will be reclaimed when the last reference to them 2015 * goes away (when frame xmits complete). 2016 */ 2017 vap = ni->ni_vap; 2018 /* 2019 * Only process stations when in RUN state. This 2020 * insures, for example, that we don't timeout an 2021 * inactive station during CAC. Note that CSA state 2022 * is actually handled in ieee80211_node_timeout as 2023 * it applies to more than timeout processing. 2024 */ 2025 if (vap->iv_state != IEEE80211_S_RUN) 2026 continue; 2027 /* XXX can vap be NULL? */ 2028 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 2029 vap->iv_opmode == IEEE80211_M_STA) && 2030 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 2031 continue; 2032 /* 2033 * Free fragment if not needed anymore 2034 * (last fragment older than 1s). 2035 * XXX doesn't belong here, move to node_age 2036 */ 2037 if (ni->ni_rxfrag[0] != NULL && 2038 ticks > ni->ni_rxfragstamp + hz) { 2039 m_freem(ni->ni_rxfrag[0]); 2040 ni->ni_rxfrag[0] = NULL; 2041 } 2042 if (ni->ni_inact > 0) { 2043 ni->ni_inact--; 2044 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 2045 "%s: inact %u inact_reload %u nrates %u", 2046 __func__, ni->ni_inact, ni->ni_inact_reload, 2047 ni->ni_rates.rs_nrates); 2048 } 2049 /* 2050 * Special case ourself; we may be idle for extended periods 2051 * of time and regardless reclaiming our state is wrong. 2052 * XXX run ic_node_age 2053 */ 2054 if (ni == vap->iv_bss) 2055 continue; 2056 if (ni->ni_associd != 0 || 2057 (vap->iv_opmode == IEEE80211_M_IBSS || 2058 vap->iv_opmode == IEEE80211_M_AHDEMO)) { 2059 /* 2060 * Age/drain resources held by the station. 2061 */ 2062 ic->ic_node_age(ni); 2063 /* 2064 * Probe the station before time it out. We 2065 * send a null data frame which may not be 2066 * universally supported by drivers (need it 2067 * for ps-poll support so it should be...). 2068 * 2069 * XXX don't probe the station unless we've 2070 * received a frame from them (and have 2071 * some idea of the rates they are capable 2072 * of); this will get fixed more properly 2073 * soon with better handling of the rate set. 2074 */ 2075 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 2076 (0 < ni->ni_inact && 2077 ni->ni_inact <= vap->iv_inact_probe) && 2078 ni->ni_rates.rs_nrates != 0) { 2079 IEEE80211_NOTE(vap, 2080 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, 2081 ni, "%s", 2082 "probe station due to inactivity"); 2083 /* 2084 * Grab a reference before unlocking the table 2085 * so the node cannot be reclaimed before we 2086 * send the frame. ieee80211_send_nulldata 2087 * understands we've done this and reclaims the 2088 * ref for us as needed. 2089 */ 2090 ieee80211_ref_node(ni); 2091 IEEE80211_NODE_UNLOCK(nt); 2092 ieee80211_send_nulldata(ni); 2093 /* XXX stat? */ 2094 goto restart; 2095 } 2096 } 2097 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 2098 ni->ni_inact <= 0) { 2099 IEEE80211_NOTE(vap, 2100 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, ni, 2101 "station timed out due to inactivity " 2102 "(refcnt %u)", ieee80211_node_refcnt(ni)); 2103 /* 2104 * Send a deauthenticate frame and drop the station. 2105 * This is somewhat complicated due to reference counts 2106 * and locking. At this point a station will typically 2107 * have a reference count of 1. ieee80211_node_leave 2108 * will do a "free" of the node which will drop the 2109 * reference count. But in the meantime a reference 2110 * wil be held by the deauth frame. The actual reclaim 2111 * of the node will happen either after the tx is 2112 * completed or by ieee80211_node_leave. 2113 * 2114 * Separately we must drop the node lock before sending 2115 * in case the driver takes a lock, as this can result 2116 * in a LOR between the node lock and the driver lock. 2117 */ 2118 ieee80211_ref_node(ni); 2119 IEEE80211_NODE_UNLOCK(nt); 2120 if (ni->ni_associd != 0) { 2121 IEEE80211_SEND_MGMT(ni, 2122 IEEE80211_FC0_SUBTYPE_DEAUTH, 2123 IEEE80211_REASON_AUTH_EXPIRE); 2124 } 2125 ieee80211_node_leave(ni); 2126 ieee80211_free_node(ni); 2127 vap->iv_stats.is_node_timeout++; 2128 goto restart; 2129 } 2130 } 2131 IEEE80211_NODE_UNLOCK(nt); 2132 2133 IEEE80211_NODE_ITERATE_UNLOCK(nt); 2134} 2135 2136/* 2137 * Aggressively reclaim resources. This should be used 2138 * only in a critical situation to reclaim mbuf resources. 2139 */ 2140void 2141ieee80211_drain(struct ieee80211com *ic) 2142{ 2143 struct ieee80211_node_table *nt = &ic->ic_sta; 2144 struct ieee80211vap *vap; 2145 struct ieee80211_node *ni; 2146 2147 IEEE80211_NODE_LOCK(nt); 2148 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2149 /* 2150 * Ignore entries for which have yet to receive an 2151 * authentication frame. These are transient and 2152 * will be reclaimed when the last reference to them 2153 * goes away (when frame xmits complete). 2154 */ 2155 vap = ni->ni_vap; 2156 /* 2157 * Only process stations when in RUN state. This 2158 * insures, for example, that we don't timeout an 2159 * inactive station during CAC. Note that CSA state 2160 * is actually handled in ieee80211_node_timeout as 2161 * it applies to more than timeout processing. 2162 */ 2163 if (vap->iv_state != IEEE80211_S_RUN) 2164 continue; 2165 /* XXX can vap be NULL? */ 2166 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 2167 vap->iv_opmode == IEEE80211_M_STA) && 2168 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 2169 continue; 2170 /* 2171 * Free fragments. 2172 * XXX doesn't belong here, move to node_drain 2173 */ 2174 if (ni->ni_rxfrag[0] != NULL) { 2175 m_freem(ni->ni_rxfrag[0]); 2176 ni->ni_rxfrag[0] = NULL; 2177 } 2178 /* 2179 * Drain resources held by the station. 2180 */ 2181 ic->ic_node_drain(ni); 2182 } 2183 IEEE80211_NODE_UNLOCK(nt); 2184} 2185 2186/* 2187 * Per-ieee80211com inactivity timer callback. 2188 */ 2189void 2190ieee80211_node_timeout(void *arg) 2191{ 2192 struct ieee80211com *ic = arg; 2193 2194 /* 2195 * Defer timeout processing if a channel switch is pending. 2196 * We typically need to be mute so not doing things that 2197 * might generate frames is good to handle in one place. 2198 * Supressing the station timeout processing may extend the 2199 * lifetime of inactive stations (by not decrementing their 2200 * idle counters) but this should be ok unless the CSA is 2201 * active for an unusually long time. 2202 */ 2203 if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) { 2204 ieee80211_scan_timeout(ic); 2205 ieee80211_timeout_stations(ic); 2206 ieee80211_ageq_age(&ic->ic_stageq, IEEE80211_INACT_WAIT); 2207 2208 IEEE80211_LOCK(ic); 2209 ieee80211_erp_timeout(ic); 2210 ieee80211_ht_timeout(ic); 2211 IEEE80211_UNLOCK(ic); 2212 } 2213 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, 2214 ieee80211_node_timeout, ic); 2215} 2216 2217/* 2218 * Iterate over the node table and return an array of ref'ed nodes. 2219 * 2220 * This is separated out from calling the actual node function so that 2221 * no LORs will occur. 2222 * 2223 * If there are too many nodes (ie, the number of nodes doesn't fit 2224 * within 'max_aid' entries) then the node references will be freed 2225 * and an error will be returned. 2226 * 2227 * The responsibility of allocating and freeing "ni_arr" is up to 2228 * the caller. 2229 */ 2230int 2231ieee80211_iterate_nt(struct ieee80211_node_table *nt, 2232 struct ieee80211_node **ni_arr, uint16_t max_aid) 2233{ 2234 u_int gen; 2235 int i, j, ret; 2236 struct ieee80211_node *ni; 2237 2238 IEEE80211_NODE_ITERATE_LOCK(nt); 2239 IEEE80211_NODE_LOCK(nt); 2240 2241 gen = ++nt->nt_scangen; 2242 i = ret = 0; 2243 2244 /* 2245 * We simply assume here that since the node 2246 * scan generation doesn't change (as 2247 * we are holding both the node table and 2248 * node table iteration locks), we can simply 2249 * assign it to the node here. 2250 */ 2251 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2252 if (i >= max_aid) { 2253 ret = E2BIG; 2254 if_printf(nt->nt_ic->ic_ifp, 2255 "Node array overflow: max=%u", max_aid); 2256 break; 2257 } 2258 ni_arr[i] = ieee80211_ref_node(ni); 2259 ni_arr[i]->ni_scangen = gen; 2260 i++; 2261 } 2262 2263 /* 2264 * It's safe to unlock here. 2265 * 2266 * If we're successful, the list is returned. 2267 * If we're unsuccessful, the list is ignored 2268 * and we remove our references. 2269 * 2270 * This avoids any potential LOR with 2271 * ieee80211_free_node(). 2272 */ 2273 IEEE80211_NODE_UNLOCK(nt); 2274 IEEE80211_NODE_ITERATE_UNLOCK(nt); 2275 2276 /* 2277 * If ret is non-zero, we hit some kind of error. 2278 * Rather than walking some nodes, we'll walk none 2279 * of them. 2280 */ 2281 if (ret) { 2282 for (j = 0; j < i; j++) { 2283 /* ieee80211_free_node() locks by itself */ 2284 ieee80211_free_node(ni_arr[j]); 2285 } 2286 } 2287 2288 return (ret); 2289} 2290 2291/* 2292 * Just a wrapper, so we don't have to change every ieee80211_iterate_nodes() 2293 * reference in the source. 2294 * 2295 * Note that this fetches 'max_aid' from the first VAP, rather than finding 2296 * the largest max_aid from all VAPs. 2297 */ 2298void 2299ieee80211_iterate_nodes(struct ieee80211_node_table *nt, 2300 ieee80211_iter_func *f, void *arg) 2301{ 2302 struct ieee80211_node **ni_arr; 2303 size_t size; 2304 int i; 2305 uint16_t max_aid; 2306 struct ieee80211vap *vap; 2307 2308 /* Overdoing it default */ 2309 max_aid = IEEE80211_AID_MAX; 2310 2311 /* Handle the case of there being no vaps just yet */ 2312 vap = TAILQ_FIRST(&nt->nt_ic->ic_vaps); 2313 if (vap != NULL) 2314 max_aid = vap->iv_max_aid; 2315 2316 size = max_aid * sizeof(struct ieee80211_node *); 2317 ni_arr = (struct ieee80211_node **) malloc(size, M_80211_NODE, 2318 M_NOWAIT | M_ZERO); 2319 if (ni_arr == NULL) 2320 return; 2321 2322 /* 2323 * If this fails, the node table won't have any 2324 * valid entries - ieee80211_iterate_nt() frees 2325 * the references to them. So don't try walking 2326 * the table; just skip to the end and free the 2327 * temporary memory. 2328 */ 2329 if (ieee80211_iterate_nt(nt, ni_arr, max_aid) != 0) 2330 goto done; 2331 2332 for (i = 0; i < max_aid; i++) { 2333 if (ni_arr[i] == NULL) /* end of the list */ 2334 break; 2335 (*f)(arg, ni_arr[i]); 2336 /* ieee80211_free_node() locks by itself */ 2337 ieee80211_free_node(ni_arr[i]); 2338 } 2339 2340done: 2341 free(ni_arr, M_80211_NODE); 2342} 2343 2344void 2345ieee80211_dump_node(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 2346{ 2347 printf("0x%p: mac %s refcnt %d\n", ni, 2348 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)); 2349 printf("\tscangen %u authmode %u flags 0x%x\n", 2350 ni->ni_scangen, ni->ni_authmode, ni->ni_flags); 2351 printf("\tassocid 0x%x txpower %u vlan %u\n", 2352 ni->ni_associd, ni->ni_txpower, ni->ni_vlan); 2353 printf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n", 2354 ni->ni_txseqs[IEEE80211_NONQOS_TID], 2355 ni->ni_rxseqs[IEEE80211_NONQOS_TID] >> IEEE80211_SEQ_SEQ_SHIFT, 2356 ni->ni_rxseqs[IEEE80211_NONQOS_TID] & IEEE80211_SEQ_FRAG_MASK, 2357 ni->ni_rxfragstamp); 2358 printf("\trssi %d noise %d intval %u capinfo 0x%x\n", 2359 node_getrssi(ni), ni->ni_noise, 2360 ni->ni_intval, ni->ni_capinfo); 2361 printf("\tbssid %s essid \"%.*s\" channel %u:0x%x\n", 2362 ether_sprintf(ni->ni_bssid), 2363 ni->ni_esslen, ni->ni_essid, 2364 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags); 2365 printf("\tinact %u inact_reload %u txrate %u\n", 2366 ni->ni_inact, ni->ni_inact_reload, ni->ni_txrate); 2367 printf("\thtcap %x htparam %x htctlchan %u ht2ndchan %u\n", 2368 ni->ni_htcap, ni->ni_htparam, 2369 ni->ni_htctlchan, ni->ni_ht2ndchan); 2370 printf("\thtopmode %x htstbc %x chw %u\n", 2371 ni->ni_htopmode, ni->ni_htstbc, ni->ni_chw); 2372} 2373 2374void 2375ieee80211_dump_nodes(struct ieee80211_node_table *nt) 2376{ 2377 ieee80211_iterate_nodes(nt, 2378 (ieee80211_iter_func *) ieee80211_dump_node, nt); 2379} 2380 2381static void 2382ieee80211_notify_erp_locked(struct ieee80211com *ic) 2383{ 2384 struct ieee80211vap *vap; 2385 2386 IEEE80211_LOCK_ASSERT(ic); 2387 2388 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 2389 if (vap->iv_opmode == IEEE80211_M_HOSTAP) 2390 ieee80211_beacon_notify(vap, IEEE80211_BEACON_ERP); 2391} 2392 2393void 2394ieee80211_notify_erp(struct ieee80211com *ic) 2395{ 2396 IEEE80211_LOCK(ic); 2397 ieee80211_notify_erp_locked(ic); 2398 IEEE80211_UNLOCK(ic); 2399} 2400 2401/* 2402 * Handle a station joining an 11g network. 2403 */ 2404static void 2405ieee80211_node_join_11g(struct ieee80211_node *ni) 2406{ 2407 struct ieee80211com *ic = ni->ni_ic; 2408 2409 IEEE80211_LOCK_ASSERT(ic); 2410 2411 /* 2412 * Station isn't capable of short slot time. Bump 2413 * the count of long slot time stations and disable 2414 * use of short slot time. Note that the actual switch 2415 * over to long slot time use may not occur until the 2416 * next beacon transmission (per sec. 7.3.1.4 of 11g). 2417 */ 2418 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2419 ic->ic_longslotsta++; 2420 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2421 "station needs long slot time, count %d", 2422 ic->ic_longslotsta); 2423 /* XXX vap's w/ conflicting needs won't work */ 2424 if (!IEEE80211_IS_CHAN_108G(ic->ic_bsschan)) { 2425 /* 2426 * Don't force slot time when switched to turbo 2427 * mode as non-ERP stations won't be present; this 2428 * need only be done when on the normal G channel. 2429 */ 2430 ieee80211_set_shortslottime(ic, 0); 2431 } 2432 } 2433 /* 2434 * If the new station is not an ERP station 2435 * then bump the counter and enable protection 2436 * if configured. 2437 */ 2438 if (!ieee80211_iserp_rateset(&ni->ni_rates)) { 2439 ic->ic_nonerpsta++; 2440 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2441 "station is !ERP, %d non-ERP stations associated", 2442 ic->ic_nonerpsta); 2443 /* 2444 * If station does not support short preamble 2445 * then we must enable use of Barker preamble. 2446 */ 2447 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) { 2448 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2449 "%s", "station needs long preamble"); 2450 ic->ic_flags |= IEEE80211_F_USEBARKER; 2451 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; 2452 } 2453 /* 2454 * If protection is configured and this is the first 2455 * indication we should use protection, enable it. 2456 */ 2457 if (ic->ic_protmode != IEEE80211_PROT_NONE && 2458 ic->ic_nonerpsta == 1 && 2459 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2460 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2461 "%s: enable use of protection\n", __func__); 2462 ic->ic_flags |= IEEE80211_F_USEPROT; 2463 ieee80211_notify_erp_locked(ic); 2464 } 2465 } else 2466 ni->ni_flags |= IEEE80211_NODE_ERP; 2467} 2468 2469void 2470ieee80211_node_join(struct ieee80211_node *ni, int resp) 2471{ 2472 struct ieee80211com *ic = ni->ni_ic; 2473 struct ieee80211vap *vap = ni->ni_vap; 2474 int newassoc; 2475 2476 if (ni->ni_associd == 0) { 2477 uint16_t aid; 2478 2479 KASSERT(vap->iv_aid_bitmap != NULL, ("no aid bitmap")); 2480 /* 2481 * It would be good to search the bitmap 2482 * more efficiently, but this will do for now. 2483 */ 2484 for (aid = 1; aid < vap->iv_max_aid; aid++) { 2485 if (!IEEE80211_AID_ISSET(vap, aid)) 2486 break; 2487 } 2488 if (aid >= vap->iv_max_aid) { 2489 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_TOOMANY); 2490 ieee80211_node_leave(ni); 2491 return; 2492 } 2493 ni->ni_associd = aid | 0xc000; 2494 ni->ni_jointime = time_uptime; 2495 IEEE80211_LOCK(ic); 2496 IEEE80211_AID_SET(vap, ni->ni_associd); 2497 vap->iv_sta_assoc++; 2498 ic->ic_sta_assoc++; 2499 2500 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2501 ieee80211_ht_node_join(ni); 2502 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2503 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2504 ieee80211_node_join_11g(ni); 2505 IEEE80211_UNLOCK(ic); 2506 2507 newassoc = 1; 2508 } else 2509 newassoc = 0; 2510 2511 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2512 "station associated at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s", 2513 IEEE80211_NODE_AID(ni), 2514 ic->ic_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long", 2515 ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long", 2516 ic->ic_flags & IEEE80211_F_USEPROT ? ", protection" : "", 2517 ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "", 2518 ni->ni_flags & IEEE80211_NODE_HT ? 2519 (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "", 2520 ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "", 2521 ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" : 2522 ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "", 2523 ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "", 2524 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ? 2525 ", fast-frames" : "", 2526 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ? 2527 ", turbo" : "" 2528 ); 2529 2530 ieee80211_node_setuptxparms(ni); 2531 ieee80211_ratectl_node_init(ni); 2532 /* give driver a chance to setup state like ni_txrate */ 2533 if (ic->ic_newassoc != NULL) 2534 ic->ic_newassoc(ni, newassoc); 2535 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_SUCCESS); 2536 /* tell the authenticator about new station */ 2537 if (vap->iv_auth->ia_node_join != NULL) 2538 vap->iv_auth->ia_node_join(ni); 2539 ieee80211_notify_node_join(ni, 2540 resp == IEEE80211_FC0_SUBTYPE_ASSOC_RESP); 2541} 2542 2543static void 2544disable_protection(struct ieee80211com *ic) 2545{ 2546 KASSERT(ic->ic_nonerpsta == 0 && 2547 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0, 2548 ("%d non ERP stations, flags 0x%x", ic->ic_nonerpsta, 2549 ic->ic_flags_ext)); 2550 2551 ic->ic_flags &= ~IEEE80211_F_USEPROT; 2552 /* XXX verify mode? */ 2553 if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) { 2554 ic->ic_flags |= IEEE80211_F_SHPREAMBLE; 2555 ic->ic_flags &= ~IEEE80211_F_USEBARKER; 2556 } 2557 ieee80211_notify_erp_locked(ic); 2558} 2559 2560/* 2561 * Handle a station leaving an 11g network. 2562 */ 2563static void 2564ieee80211_node_leave_11g(struct ieee80211_node *ni) 2565{ 2566 struct ieee80211com *ic = ni->ni_ic; 2567 2568 IEEE80211_LOCK_ASSERT(ic); 2569 2570 KASSERT(IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan), 2571 ("not in 11g, bss %u:0x%x", ic->ic_bsschan->ic_freq, 2572 ic->ic_bsschan->ic_flags)); 2573 2574 /* 2575 * If a long slot station do the slot time bookkeeping. 2576 */ 2577 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2578 KASSERT(ic->ic_longslotsta > 0, 2579 ("bogus long slot station count %d", ic->ic_longslotsta)); 2580 ic->ic_longslotsta--; 2581 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2582 "long slot time station leaves, count now %d", 2583 ic->ic_longslotsta); 2584 if (ic->ic_longslotsta == 0) { 2585 /* 2586 * Re-enable use of short slot time if supported 2587 * and not operating in IBSS mode (per spec). 2588 */ 2589 if ((ic->ic_caps & IEEE80211_C_SHSLOT) && 2590 ic->ic_opmode != IEEE80211_M_IBSS) { 2591 IEEE80211_DPRINTF(ni->ni_vap, 2592 IEEE80211_MSG_ASSOC, 2593 "%s: re-enable use of short slot time\n", 2594 __func__); 2595 ieee80211_set_shortslottime(ic, 1); 2596 } 2597 } 2598 } 2599 /* 2600 * If a non-ERP station do the protection-related bookkeeping. 2601 */ 2602 if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) { 2603 KASSERT(ic->ic_nonerpsta > 0, 2604 ("bogus non-ERP station count %d", ic->ic_nonerpsta)); 2605 ic->ic_nonerpsta--; 2606 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2607 "non-ERP station leaves, count now %d%s", ic->ic_nonerpsta, 2608 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) ? 2609 " (non-ERP sta present)" : ""); 2610 if (ic->ic_nonerpsta == 0 && 2611 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2612 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2613 "%s: disable use of protection\n", __func__); 2614 disable_protection(ic); 2615 } 2616 } 2617} 2618 2619/* 2620 * Time out presence of an overlapping bss with non-ERP 2621 * stations. When operating in hostap mode we listen for 2622 * beacons from other stations and if we identify a non-ERP 2623 * station is present we enable protection. To identify 2624 * when all non-ERP stations are gone we time out this 2625 * condition. 2626 */ 2627static void 2628ieee80211_erp_timeout(struct ieee80211com *ic) 2629{ 2630 2631 IEEE80211_LOCK_ASSERT(ic); 2632 2633 if ((ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) && 2634 time_after(ticks, ic->ic_lastnonerp + IEEE80211_NONERP_PRESENT_AGE)) { 2635#if 0 2636 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni, 2637 "%s", "age out non-ERP sta present on channel"); 2638#endif 2639 ic->ic_flags_ext &= ~IEEE80211_FEXT_NONERP_PR; 2640 if (ic->ic_nonerpsta == 0) 2641 disable_protection(ic); 2642 } 2643} 2644 2645/* 2646 * Handle bookkeeping for station deauthentication/disassociation 2647 * when operating as an ap. 2648 */ 2649void 2650ieee80211_node_leave(struct ieee80211_node *ni) 2651{ 2652 struct ieee80211com *ic = ni->ni_ic; 2653 struct ieee80211vap *vap = ni->ni_vap; 2654 struct ieee80211_node_table *nt = ni->ni_table; 2655 2656 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2657 "station with aid %d leaves", IEEE80211_NODE_AID(ni)); 2658 2659 KASSERT(vap->iv_opmode != IEEE80211_M_STA, 2660 ("unexpected operating mode %u", vap->iv_opmode)); 2661 /* 2662 * If node wasn't previously associated all 2663 * we need to do is reclaim the reference. 2664 */ 2665 /* XXX ibss mode bypasses 11g and notification */ 2666 if (ni->ni_associd == 0) 2667 goto done; 2668 /* 2669 * Tell the authenticator the station is leaving. 2670 * Note that we must do this before yanking the 2671 * association id as the authenticator uses the 2672 * associd to locate it's state block. 2673 */ 2674 if (vap->iv_auth->ia_node_leave != NULL) 2675 vap->iv_auth->ia_node_leave(ni); 2676 2677 IEEE80211_LOCK(ic); 2678 IEEE80211_AID_CLR(vap, ni->ni_associd); 2679 ni->ni_associd = 0; 2680 vap->iv_sta_assoc--; 2681 ic->ic_sta_assoc--; 2682 2683 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2684 ieee80211_ht_node_leave(ni); 2685 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2686 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2687 ieee80211_node_leave_11g(ni); 2688 IEEE80211_UNLOCK(ic); 2689 /* 2690 * Cleanup station state. In particular clear various 2691 * state that might otherwise be reused if the node 2692 * is reused before the reference count goes to zero 2693 * (and memory is reclaimed). 2694 */ 2695 ieee80211_sta_leave(ni); 2696done: 2697 /* 2698 * Remove the node from any table it's recorded in and 2699 * drop the caller's reference. Removal from the table 2700 * is important to insure the node is not reprocessed 2701 * for inactivity. 2702 */ 2703 if (nt != NULL) { 2704 IEEE80211_NODE_LOCK(nt); 2705 node_reclaim(nt, ni); 2706 IEEE80211_NODE_UNLOCK(nt); 2707 } else 2708 ieee80211_free_node(ni); 2709} 2710 2711struct rssiinfo { 2712 struct ieee80211vap *vap; 2713 int rssi_samples; 2714 uint32_t rssi_total; 2715}; 2716 2717static void 2718get_hostap_rssi(void *arg, struct ieee80211_node *ni) 2719{ 2720 struct rssiinfo *info = arg; 2721 struct ieee80211vap *vap = ni->ni_vap; 2722 int8_t rssi; 2723 2724 if (info->vap != vap) 2725 return; 2726 /* only associated stations */ 2727 if (ni->ni_associd == 0) 2728 return; 2729 rssi = vap->iv_ic->ic_node_getrssi(ni); 2730 if (rssi != 0) { 2731 info->rssi_samples++; 2732 info->rssi_total += rssi; 2733 } 2734} 2735 2736static void 2737get_adhoc_rssi(void *arg, struct ieee80211_node *ni) 2738{ 2739 struct rssiinfo *info = arg; 2740 struct ieee80211vap *vap = ni->ni_vap; 2741 int8_t rssi; 2742 2743 if (info->vap != vap) 2744 return; 2745 /* only neighbors */ 2746 /* XXX check bssid */ 2747 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 2748 return; 2749 rssi = vap->iv_ic->ic_node_getrssi(ni); 2750 if (rssi != 0) { 2751 info->rssi_samples++; 2752 info->rssi_total += rssi; 2753 } 2754} 2755 2756#ifdef IEEE80211_SUPPORT_MESH 2757static void 2758get_mesh_rssi(void *arg, struct ieee80211_node *ni) 2759{ 2760 struct rssiinfo *info = arg; 2761 struct ieee80211vap *vap = ni->ni_vap; 2762 int8_t rssi; 2763 2764 if (info->vap != vap) 2765 return; 2766 /* only neighbors that peered successfully */ 2767 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) 2768 return; 2769 rssi = vap->iv_ic->ic_node_getrssi(ni); 2770 if (rssi != 0) { 2771 info->rssi_samples++; 2772 info->rssi_total += rssi; 2773 } 2774} 2775#endif /* IEEE80211_SUPPORT_MESH */ 2776 2777int8_t 2778ieee80211_getrssi(struct ieee80211vap *vap) 2779{ 2780#define NZ(x) ((x) == 0 ? 1 : (x)) 2781 struct ieee80211com *ic = vap->iv_ic; 2782 struct rssiinfo info; 2783 2784 info.rssi_total = 0; 2785 info.rssi_samples = 0; 2786 info.vap = vap; 2787 switch (vap->iv_opmode) { 2788 case IEEE80211_M_IBSS: /* average of all ibss neighbors */ 2789 case IEEE80211_M_AHDEMO: /* average of all neighbors */ 2790 ieee80211_iterate_nodes(&ic->ic_sta, get_adhoc_rssi, &info); 2791 break; 2792 case IEEE80211_M_HOSTAP: /* average of all associated stations */ 2793 ieee80211_iterate_nodes(&ic->ic_sta, get_hostap_rssi, &info); 2794 break; 2795#ifdef IEEE80211_SUPPORT_MESH 2796 case IEEE80211_M_MBSS: /* average of all mesh neighbors */ 2797 ieee80211_iterate_nodes(&ic->ic_sta, get_mesh_rssi, &info); 2798 break; 2799#endif 2800 case IEEE80211_M_MONITOR: /* XXX */ 2801 case IEEE80211_M_STA: /* use stats from associated ap */ 2802 default: 2803 if (vap->iv_bss != NULL) 2804 info.rssi_total = ic->ic_node_getrssi(vap->iv_bss); 2805 info.rssi_samples = 1; 2806 break; 2807 } 2808 return info.rssi_total / NZ(info.rssi_samples); 2809#undef NZ 2810} 2811 2812void 2813ieee80211_getsignal(struct ieee80211vap *vap, int8_t *rssi, int8_t *noise) 2814{ 2815 2816 if (vap->iv_bss == NULL) /* NB: shouldn't happen */ 2817 return; 2818 vap->iv_ic->ic_node_getsignal(vap->iv_bss, rssi, noise); 2819 /* for non-station mode return avg'd rssi accounting */ 2820 if (vap->iv_opmode != IEEE80211_M_STA) 2821 *rssi = ieee80211_getrssi(vap); 2822} 2823