ieee80211_node.c revision 220907
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 220907 2011-04-21 03:47:40Z 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} 687 688/* 689 * Join the specified IBSS/BSS network. The node is assumed to 690 * be passed in with a held reference. 691 */ 692static int 693ieee80211_sta_join1(struct ieee80211_node *selbs) 694{ 695 struct ieee80211vap *vap = selbs->ni_vap; 696 struct ieee80211com *ic = selbs->ni_ic; 697 struct ieee80211_node *obss; 698 int canreassoc; 699 700 /* 701 * Committed to selbs, setup state. 702 */ 703 obss = vap->iv_bss; 704 /* 705 * Check if old+new node have the same address in which 706 * case we can reassociate when operating in sta mode. 707 */ 708 canreassoc = (obss != NULL && 709 vap->iv_state == IEEE80211_S_RUN && 710 IEEE80211_ADDR_EQ(obss->ni_macaddr, selbs->ni_macaddr)); 711 vap->iv_bss = selbs; /* NB: caller assumed to bump refcnt */ 712 if (obss != NULL) { 713 copy_bss(selbs, obss); 714 ieee80211_node_decref(obss); /* iv_bss reference */ 715 ieee80211_free_node(obss); /* station table reference */ 716 obss = NULL; /* NB: guard against later use */ 717 } 718 719 /* 720 * Delete unusable rates; we've already checked 721 * that the negotiated rate set is acceptable. 722 */ 723 ieee80211_fix_rate(vap->iv_bss, &vap->iv_bss->ni_rates, 724 IEEE80211_F_DODEL | IEEE80211_F_JOIN); 725 726 ieee80211_setcurchan(ic, selbs->ni_chan); 727 /* 728 * Set the erp state (mostly the slot time) to deal with 729 * the auto-select case; this should be redundant if the 730 * mode is locked. 731 */ 732 ieee80211_reset_erp(ic); 733 ieee80211_wme_initparams(vap); 734 735 if (vap->iv_opmode == IEEE80211_M_STA) { 736 if (canreassoc) { 737 /* Reassociate */ 738 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 1); 739 } else { 740 /* 741 * Act as if we received a DEAUTH frame in case we 742 * are invoked from the RUN state. This will cause 743 * us to try to re-authenticate if we are operating 744 * as a station. 745 */ 746 ieee80211_new_state(vap, IEEE80211_S_AUTH, 747 IEEE80211_FC0_SUBTYPE_DEAUTH); 748 } 749 } else 750 ieee80211_new_state(vap, IEEE80211_S_RUN, -1); 751 return 1; 752} 753 754int 755ieee80211_sta_join(struct ieee80211vap *vap, struct ieee80211_channel *chan, 756 const struct ieee80211_scan_entry *se) 757{ 758 struct ieee80211com *ic = vap->iv_ic; 759 struct ieee80211_node *ni; 760 761 ni = ieee80211_alloc_node(&ic->ic_sta, vap, se->se_macaddr); 762 if (ni == NULL) { 763 /* XXX msg */ 764 return 0; 765 } 766 /* 767 * Expand scan state into node's format. 768 * XXX may not need all this stuff 769 */ 770 IEEE80211_ADDR_COPY(ni->ni_bssid, se->se_bssid); 771 ni->ni_esslen = se->se_ssid[1]; 772 memcpy(ni->ni_essid, se->se_ssid+2, ni->ni_esslen); 773 ni->ni_tstamp.tsf = se->se_tstamp.tsf; 774 ni->ni_intval = se->se_intval; 775 ni->ni_capinfo = se->se_capinfo; 776 ni->ni_chan = chan; 777 ni->ni_timoff = se->se_timoff; 778 ni->ni_fhdwell = se->se_fhdwell; 779 ni->ni_fhindex = se->se_fhindex; 780 ni->ni_erp = se->se_erp; 781 IEEE80211_RSSI_LPF(ni->ni_avgrssi, se->se_rssi); 782 ni->ni_noise = se->se_noise; 783 if (vap->iv_opmode == IEEE80211_M_STA) { 784 /* NB: only infrastructure mode requires an associd */ 785 ni->ni_flags |= IEEE80211_NODE_ASSOCID; 786 } 787 788 if (ieee80211_ies_init(&ni->ni_ies, se->se_ies.data, se->se_ies.len)) { 789 ieee80211_ies_expand(&ni->ni_ies); 790#ifdef IEEE80211_SUPPORT_SUPERG 791 if (ni->ni_ies.ath_ie != NULL) 792 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 793#endif 794 if (ni->ni_ies.htcap_ie != NULL) 795 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie); 796 if (ni->ni_ies.htinfo_ie != NULL) 797 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie); 798#ifdef IEEE80211_SUPPORT_MESH 799 if (ni->ni_ies.meshid_ie != NULL) 800 ieee80211_parse_meshid(ni, ni->ni_ies.meshid_ie); 801#endif 802#ifdef IEEE80211_SUPPORT_TDMA 803 if (ni->ni_ies.tdma_ie != NULL) 804 ieee80211_parse_tdma(ni, ni->ni_ies.tdma_ie); 805#endif 806 } 807 808 vap->iv_dtim_period = se->se_dtimperiod; 809 vap->iv_dtim_count = 0; 810 811 /* NB: must be after ni_chan is setup */ 812 ieee80211_setup_rates(ni, se->se_rates, se->se_xrates, 813 IEEE80211_F_DOSORT); 814 if (ieee80211_iserp_rateset(&ni->ni_rates)) 815 ni->ni_flags |= IEEE80211_NODE_ERP; 816 ieee80211_node_setuptxparms(ni); 817 ieee80211_ratectl_node_init(ni); 818 819 return ieee80211_sta_join1(ieee80211_ref_node(ni)); 820} 821 822/* 823 * Leave the specified IBSS/BSS network. The node is assumed to 824 * be passed in with a held reference. 825 */ 826void 827ieee80211_sta_leave(struct ieee80211_node *ni) 828{ 829 struct ieee80211com *ic = ni->ni_ic; 830 831 ic->ic_node_cleanup(ni); 832 ieee80211_notify_node_leave(ni); 833} 834 835/* 836 * Send a deauthenticate frame and drop the station. 837 */ 838void 839ieee80211_node_deauth(struct ieee80211_node *ni, int reason) 840{ 841 /* NB: bump the refcnt to be sure temporay nodes are not reclaimed */ 842 ieee80211_ref_node(ni); 843 if (ni->ni_associd != 0) 844 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH, reason); 845 ieee80211_node_leave(ni); 846 ieee80211_free_node(ni); 847} 848 849static struct ieee80211_node * 850node_alloc(struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 851{ 852 struct ieee80211_node *ni; 853 854 ni = (struct ieee80211_node *) malloc(sizeof(struct ieee80211_node), 855 M_80211_NODE, M_NOWAIT | M_ZERO); 856 return ni; 857} 858 859/* 860 * Initialize an ie blob with the specified data. If previous 861 * data exists re-use the data block. As a side effect we clear 862 * all references to specific ie's; the caller is required to 863 * recalculate them. 864 */ 865int 866ieee80211_ies_init(struct ieee80211_ies *ies, const uint8_t *data, int len) 867{ 868 /* NB: assumes data+len are the last fields */ 869 memset(ies, 0, offsetof(struct ieee80211_ies, data)); 870 if (ies->data != NULL && ies->len != len) { 871 /* data size changed */ 872 free(ies->data, M_80211_NODE_IE); 873 ies->data = NULL; 874 } 875 if (ies->data == NULL) { 876 ies->data = (uint8_t *) malloc(len, M_80211_NODE_IE, M_NOWAIT); 877 if (ies->data == NULL) { 878 ies->len = 0; 879 /* NB: pointers have already been zero'd above */ 880 return 0; 881 } 882 } 883 memcpy(ies->data, data, len); 884 ies->len = len; 885 return 1; 886} 887 888/* 889 * Reclaim storage for an ie blob. 890 */ 891void 892ieee80211_ies_cleanup(struct ieee80211_ies *ies) 893{ 894 if (ies->data != NULL) 895 free(ies->data, M_80211_NODE_IE); 896} 897 898/* 899 * Expand an ie blob data contents and to fillin individual 900 * ie pointers. The data blob is assumed to be well-formed; 901 * we don't do any validity checking of ie lengths. 902 */ 903void 904ieee80211_ies_expand(struct ieee80211_ies *ies) 905{ 906 uint8_t *ie; 907 int ielen; 908 909 ie = ies->data; 910 ielen = ies->len; 911 while (ielen > 0) { 912 switch (ie[0]) { 913 case IEEE80211_ELEMID_VENDOR: 914 if (iswpaoui(ie)) 915 ies->wpa_ie = ie; 916 else if (iswmeoui(ie)) 917 ies->wme_ie = ie; 918#ifdef IEEE80211_SUPPORT_SUPERG 919 else if (isatherosoui(ie)) 920 ies->ath_ie = ie; 921#endif 922#ifdef IEEE80211_SUPPORT_TDMA 923 else if (istdmaoui(ie)) 924 ies->tdma_ie = ie; 925#endif 926 break; 927 case IEEE80211_ELEMID_RSN: 928 ies->rsn_ie = ie; 929 break; 930 case IEEE80211_ELEMID_HTCAP: 931 ies->htcap_ie = ie; 932 break; 933#ifdef IEEE80211_SUPPORT_MESH 934 case IEEE80211_ELEMID_MESHID: 935 ies->meshid_ie = ie; 936 break; 937#endif 938 } 939 ielen -= 2 + ie[1]; 940 ie += 2 + ie[1]; 941 } 942} 943 944/* 945 * Reclaim any resources in a node and reset any critical 946 * state. Typically nodes are free'd immediately after, 947 * but in some cases the storage may be reused so we need 948 * to insure consistent state (should probably fix that). 949 */ 950static void 951node_cleanup(struct ieee80211_node *ni) 952{ 953#define N(a) (sizeof(a)/sizeof(a[0])) 954 struct ieee80211vap *vap = ni->ni_vap; 955 struct ieee80211com *ic = ni->ni_ic; 956 int i; 957 958 /* NB: preserve ni_table */ 959 if (ni->ni_flags & IEEE80211_NODE_PWR_MGT) { 960 if (vap->iv_opmode != IEEE80211_M_STA) 961 vap->iv_ps_sta--; 962 ni->ni_flags &= ~IEEE80211_NODE_PWR_MGT; 963 IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni, 964 "power save mode off, %u sta's in ps mode", vap->iv_ps_sta); 965 } 966 /* 967 * Cleanup any HT-related state. 968 */ 969 if (ni->ni_flags & IEEE80211_NODE_HT) 970 ieee80211_ht_node_cleanup(ni); 971#ifdef IEEE80211_SUPPORT_SUPERG 972 else if (ni->ni_ath_flags & IEEE80211_NODE_ATH) 973 ieee80211_ff_node_cleanup(ni); 974#endif 975#ifdef IEEE80211_SUPPORT_MESH 976 /* 977 * Cleanup any mesh-related state. 978 */ 979 if (vap->iv_opmode == IEEE80211_M_MBSS) 980 ieee80211_mesh_node_cleanup(ni); 981#endif 982 /* 983 * Clear any staging queue entries. 984 */ 985 ieee80211_ageq_drain_node(&ic->ic_stageq, ni); 986 987 /* 988 * Clear AREF flag that marks the authorization refcnt bump 989 * has happened. This is probably not needed as the node 990 * should always be removed from the table so not found but 991 * do it just in case. 992 * Likewise clear the ASSOCID flag as these flags are intended 993 * to be managed in tandem. 994 */ 995 ni->ni_flags &= ~(IEEE80211_NODE_AREF | IEEE80211_NODE_ASSOCID); 996 997 /* 998 * Drain power save queue and, if needed, clear TIM. 999 */ 1000 if (ieee80211_node_psq_drain(ni) != 0 && vap->iv_set_tim != NULL) 1001 vap->iv_set_tim(ni, 0); 1002 1003 ni->ni_associd = 0; 1004 if (ni->ni_challenge != NULL) { 1005 free(ni->ni_challenge, M_80211_NODE); 1006 ni->ni_challenge = NULL; 1007 } 1008 /* 1009 * Preserve SSID, WPA, and WME ie's so the bss node is 1010 * reusable during a re-auth/re-assoc state transition. 1011 * If we remove these data they will not be recreated 1012 * because they come from a probe-response or beacon frame 1013 * which cannot be expected prior to the association-response. 1014 * This should not be an issue when operating in other modes 1015 * as stations leaving always go through a full state transition 1016 * which will rebuild this state. 1017 * 1018 * XXX does this leave us open to inheriting old state? 1019 */ 1020 for (i = 0; i < N(ni->ni_rxfrag); i++) 1021 if (ni->ni_rxfrag[i] != NULL) { 1022 m_freem(ni->ni_rxfrag[i]); 1023 ni->ni_rxfrag[i] = NULL; 1024 } 1025 /* 1026 * Must be careful here to remove any key map entry w/o a LOR. 1027 */ 1028 ieee80211_node_delucastkey(ni); 1029#undef N 1030} 1031 1032static void 1033node_free(struct ieee80211_node *ni) 1034{ 1035 struct ieee80211com *ic = ni->ni_ic; 1036 1037 ieee80211_ratectl_node_deinit(ni); 1038 ic->ic_node_cleanup(ni); 1039 ieee80211_ies_cleanup(&ni->ni_ies); 1040 ieee80211_psq_cleanup(&ni->ni_psq); 1041 free(ni, M_80211_NODE); 1042} 1043 1044static void 1045node_age(struct ieee80211_node *ni) 1046{ 1047 struct ieee80211vap *vap = ni->ni_vap; 1048 1049 IEEE80211_NODE_LOCK_ASSERT(&vap->iv_ic->ic_sta); 1050 1051 /* 1052 * Age frames on the power save queue. 1053 */ 1054 if (ieee80211_node_psq_age(ni) != 0 && 1055 ni->ni_psq.psq_len == 0 && vap->iv_set_tim != NULL) 1056 vap->iv_set_tim(ni, 0); 1057 /* 1058 * Age out HT resources (e.g. frames on the 1059 * A-MPDU reorder queues). 1060 */ 1061 if (ni->ni_associd != 0 && (ni->ni_flags & IEEE80211_NODE_HT)) 1062 ieee80211_ht_node_age(ni); 1063} 1064 1065static int8_t 1066node_getrssi(const struct ieee80211_node *ni) 1067{ 1068 uint32_t avgrssi = ni->ni_avgrssi; 1069 int32_t rssi; 1070 1071 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) 1072 return 0; 1073 rssi = IEEE80211_RSSI_GET(avgrssi); 1074 return rssi < 0 ? 0 : rssi > 127 ? 127 : rssi; 1075} 1076 1077static void 1078node_getsignal(const struct ieee80211_node *ni, int8_t *rssi, int8_t *noise) 1079{ 1080 *rssi = node_getrssi(ni); 1081 *noise = ni->ni_noise; 1082} 1083 1084static void 1085node_getmimoinfo(const struct ieee80211_node *ni, 1086 struct ieee80211_mimo_info *info) 1087{ 1088 int i; 1089 uint32_t avgrssi; 1090 int32_t rssi; 1091 1092 bzero(info, sizeof(*info)); 1093 1094 /* XXX set flags - evm, ctl/ext data, etc. */ 1095 info->n_rx_chains = ni->ni_mimo_chains; 1096 1097 for (i = 0; i < ni->ni_mimo_chains; i++) { 1098 /* Ctl channel */ 1099 avgrssi = ni->ni_mimo_rssi_ctl[i]; 1100 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) { 1101 info->rssi_ctl[i] = 0; 1102 } else { 1103 rssi = IEEE80211_RSSI_GET(avgrssi); 1104 info->rssi_ctl[i] = rssi < 0 ? 0 : rssi > 127 ? 127 : rssi; 1105 } 1106 info->noise_ctl[i] = ni->ni_mimo_noise_ctl[i]; 1107 1108 /* Ext channel */ 1109 avgrssi = ni->ni_mimo_rssi_ext[i]; 1110 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) { 1111 info->rssi_ext[i] = 0; 1112 } else { 1113 rssi = IEEE80211_RSSI_GET(avgrssi); 1114 info->rssi_ext[i] = rssi < 0 ? 0 : rssi > 127 ? 127 : rssi; 1115 } 1116 info->noise_ext[i] = ni->ni_mimo_noise_ext[i]; 1117 } 1118 1119 /* XXX EVM? */ 1120} 1121 1122struct ieee80211_node * 1123ieee80211_alloc_node(struct ieee80211_node_table *nt, 1124 struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1125{ 1126 struct ieee80211com *ic = nt->nt_ic; 1127 struct ieee80211_node *ni; 1128 int hash; 1129 1130 ni = ic->ic_node_alloc(vap, macaddr); 1131 if (ni == NULL) { 1132 vap->iv_stats.is_rx_nodealloc++; 1133 return NULL; 1134 } 1135 1136 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1137 "%s %p<%s> in %s table\n", __func__, ni, 1138 ether_sprintf(macaddr), nt->nt_name); 1139 1140 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1141 hash = IEEE80211_NODE_HASH(ic, macaddr); 1142 ieee80211_node_initref(ni); /* mark referenced */ 1143 ni->ni_chan = IEEE80211_CHAN_ANYC; 1144 ni->ni_authmode = IEEE80211_AUTH_OPEN; 1145 ni->ni_txpower = ic->ic_txpowlimit; /* max power */ 1146 ni->ni_txparms = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)]; 1147 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE); 1148 ni->ni_avgrssi = IEEE80211_RSSI_DUMMY_MARKER; 1149 ni->ni_inact_reload = nt->nt_inact_init; 1150 ni->ni_inact = ni->ni_inact_reload; 1151 ni->ni_ath_defkeyix = 0x7fff; 1152 ieee80211_psq_init(&ni->ni_psq, "unknown"); 1153#ifdef IEEE80211_SUPPORT_MESH 1154 if (vap->iv_opmode == IEEE80211_M_MBSS) 1155 ieee80211_mesh_node_init(vap, ni); 1156#endif 1157 IEEE80211_NODE_LOCK(nt); 1158 TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list); 1159 LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash); 1160 ni->ni_table = nt; 1161 ni->ni_vap = vap; 1162 ni->ni_ic = ic; 1163 IEEE80211_NODE_UNLOCK(nt); 1164 1165 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 1166 "%s: inact_reload %u", __func__, ni->ni_inact_reload); 1167 1168 ieee80211_ratectl_node_init(ni); 1169 1170 return ni; 1171} 1172 1173/* 1174 * Craft a temporary node suitable for sending a management frame 1175 * to the specified station. We craft only as much state as we 1176 * need to do the work since the node will be immediately reclaimed 1177 * once the send completes. 1178 */ 1179struct ieee80211_node * 1180ieee80211_tmp_node(struct ieee80211vap *vap, 1181 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1182{ 1183 struct ieee80211com *ic = vap->iv_ic; 1184 struct ieee80211_node *ni; 1185 1186 ni = ic->ic_node_alloc(vap, macaddr); 1187 if (ni != NULL) { 1188 struct ieee80211_node *bss = vap->iv_bss; 1189 1190 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1191 "%s %p<%s>\n", __func__, ni, ether_sprintf(macaddr)); 1192 1193 ni->ni_table = NULL; /* NB: pedantic */ 1194 ni->ni_ic = ic; /* NB: needed to set channel */ 1195 ni->ni_vap = vap; 1196 1197 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1198 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1199 ieee80211_node_initref(ni); /* mark referenced */ 1200 /* NB: required by ieee80211_fix_rate */ 1201 ieee80211_node_set_chan(ni, bss->ni_chan); 1202 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, 1203 IEEE80211_KEYIX_NONE); 1204 ni->ni_txpower = bss->ni_txpower; 1205 /* XXX optimize away */ 1206 ieee80211_psq_init(&ni->ni_psq, "unknown"); 1207 1208 ieee80211_ratectl_node_init(ni); 1209 } else { 1210 /* XXX msg */ 1211 vap->iv_stats.is_rx_nodealloc++; 1212 } 1213 return ni; 1214} 1215 1216struct ieee80211_node * 1217ieee80211_dup_bss(struct ieee80211vap *vap, 1218 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1219{ 1220 struct ieee80211com *ic = vap->iv_ic; 1221 struct ieee80211_node *ni; 1222 1223 ni = ieee80211_alloc_node(&ic->ic_sta, vap, macaddr); 1224 if (ni != NULL) { 1225 struct ieee80211_node *bss = vap->iv_bss; 1226 /* 1227 * Inherit from iv_bss. 1228 */ 1229 copy_bss(ni, bss); 1230 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1231 ieee80211_node_set_chan(ni, bss->ni_chan); 1232 } 1233 return ni; 1234} 1235 1236/* 1237 * Create a bss node for a legacy WDS vap. The far end does 1238 * not associate so we just create create a new node and 1239 * simulate an association. The caller is responsible for 1240 * installing the node as the bss node and handling any further 1241 * setup work like authorizing the port. 1242 */ 1243struct ieee80211_node * 1244ieee80211_node_create_wds(struct ieee80211vap *vap, 1245 const uint8_t bssid[IEEE80211_ADDR_LEN], struct ieee80211_channel *chan) 1246{ 1247 struct ieee80211com *ic = vap->iv_ic; 1248 struct ieee80211_node *ni; 1249 1250 /* XXX check if node already in sta table? */ 1251 ni = ieee80211_alloc_node(&ic->ic_sta, vap, bssid); 1252 if (ni != NULL) { 1253 ni->ni_wdsvap = vap; 1254 IEEE80211_ADDR_COPY(ni->ni_bssid, bssid); 1255 /* 1256 * Inherit any manually configured settings. 1257 */ 1258 copy_bss(ni, vap->iv_bss); 1259 ieee80211_node_set_chan(ni, chan); 1260 /* NB: propagate ssid so available to WPA supplicant */ 1261 ni->ni_esslen = vap->iv_des_ssid[0].len; 1262 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen); 1263 /* NB: no associd for peer */ 1264 /* 1265 * There are no management frames to use to 1266 * discover neighbor capabilities, so blindly 1267 * propagate the local configuration. 1268 */ 1269 if (vap->iv_flags & IEEE80211_F_WME) 1270 ni->ni_flags |= IEEE80211_NODE_QOS; 1271#ifdef IEEE80211_SUPPORT_SUPERG 1272 if (vap->iv_flags & IEEE80211_F_FF) 1273 ni->ni_flags |= IEEE80211_NODE_FF; 1274#endif 1275 if ((ic->ic_htcaps & IEEE80211_HTC_HT) && 1276 (vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1277 /* 1278 * Device is HT-capable and HT is enabled for 1279 * the vap; setup HT operation. On return 1280 * ni_chan will be adjusted to an HT channel. 1281 */ 1282 ieee80211_ht_wds_init(ni); 1283 } else { 1284 struct ieee80211_channel *c = ni->ni_chan; 1285 /* 1286 * Force a legacy channel to be used. 1287 */ 1288 c = ieee80211_find_channel(ic, 1289 c->ic_freq, c->ic_flags &~ IEEE80211_CHAN_HT); 1290 KASSERT(c != NULL, ("no legacy channel, %u/%x", 1291 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags)); 1292 ni->ni_chan = c; 1293 } 1294 } 1295 return ni; 1296} 1297 1298struct ieee80211_node * 1299#ifdef IEEE80211_DEBUG_REFCNT 1300ieee80211_find_node_locked_debug(struct ieee80211_node_table *nt, 1301 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1302#else 1303ieee80211_find_node_locked(struct ieee80211_node_table *nt, 1304 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1305#endif 1306{ 1307 struct ieee80211_node *ni; 1308 int hash; 1309 1310 IEEE80211_NODE_LOCK_ASSERT(nt); 1311 1312 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr); 1313 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1314 if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1315 ieee80211_ref_node(ni); /* mark referenced */ 1316#ifdef IEEE80211_DEBUG_REFCNT 1317 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1318 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1319 func, line, 1320 ni, ether_sprintf(ni->ni_macaddr), 1321 ieee80211_node_refcnt(ni)); 1322#endif 1323 return ni; 1324 } 1325 } 1326 return NULL; 1327} 1328 1329struct ieee80211_node * 1330#ifdef IEEE80211_DEBUG_REFCNT 1331ieee80211_find_node_debug(struct ieee80211_node_table *nt, 1332 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1333#else 1334ieee80211_find_node(struct ieee80211_node_table *nt, 1335 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1336#endif 1337{ 1338 struct ieee80211_node *ni; 1339 1340 IEEE80211_NODE_LOCK(nt); 1341 ni = ieee80211_find_node_locked(nt, macaddr); 1342 IEEE80211_NODE_UNLOCK(nt); 1343 return ni; 1344} 1345 1346struct ieee80211_node * 1347#ifdef IEEE80211_DEBUG_REFCNT 1348ieee80211_find_vap_node_locked_debug(struct ieee80211_node_table *nt, 1349 const struct ieee80211vap *vap, 1350 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1351#else 1352ieee80211_find_vap_node_locked(struct ieee80211_node_table *nt, 1353 const struct ieee80211vap *vap, 1354 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1355#endif 1356{ 1357 struct ieee80211_node *ni; 1358 int hash; 1359 1360 IEEE80211_NODE_LOCK_ASSERT(nt); 1361 1362 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr); 1363 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1364 if (ni->ni_vap == vap && 1365 IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1366 ieee80211_ref_node(ni); /* mark referenced */ 1367#ifdef IEEE80211_DEBUG_REFCNT 1368 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1369 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1370 func, line, 1371 ni, ether_sprintf(ni->ni_macaddr), 1372 ieee80211_node_refcnt(ni)); 1373#endif 1374 return ni; 1375 } 1376 } 1377 return NULL; 1378} 1379 1380struct ieee80211_node * 1381#ifdef IEEE80211_DEBUG_REFCNT 1382ieee80211_find_vap_node_debug(struct ieee80211_node_table *nt, 1383 const struct ieee80211vap *vap, 1384 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1385#else 1386ieee80211_find_vap_node(struct ieee80211_node_table *nt, 1387 const struct ieee80211vap *vap, 1388 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1389#endif 1390{ 1391 struct ieee80211_node *ni; 1392 1393 IEEE80211_NODE_LOCK(nt); 1394 ni = ieee80211_find_vap_node_locked(nt, vap, macaddr); 1395 IEEE80211_NODE_UNLOCK(nt); 1396 return ni; 1397} 1398 1399/* 1400 * Fake up a node; this handles node discovery in adhoc mode. 1401 * Note that for the driver's benefit we we treat this like 1402 * an association so the driver has an opportunity to setup 1403 * it's private state. 1404 */ 1405struct ieee80211_node * 1406ieee80211_fakeup_adhoc_node(struct ieee80211vap *vap, 1407 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1408{ 1409 struct ieee80211_node *ni; 1410 1411 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1412 "%s: mac<%s>\n", __func__, ether_sprintf(macaddr)); 1413 ni = ieee80211_dup_bss(vap, macaddr); 1414 if (ni != NULL) { 1415 struct ieee80211com *ic = vap->iv_ic; 1416 1417 /* XXX no rate negotiation; just dup */ 1418 ni->ni_rates = vap->iv_bss->ni_rates; 1419 if (ieee80211_iserp_rateset(&ni->ni_rates)) 1420 ni->ni_flags |= IEEE80211_NODE_ERP; 1421 if (vap->iv_opmode == IEEE80211_M_AHDEMO) { 1422 /* 1423 * In adhoc demo mode there are no management 1424 * frames to use to discover neighbor capabilities, 1425 * so blindly propagate the local configuration 1426 * so we can do interesting things (e.g. use 1427 * WME to disable ACK's). 1428 */ 1429 if (vap->iv_flags & IEEE80211_F_WME) 1430 ni->ni_flags |= IEEE80211_NODE_QOS; 1431#ifdef IEEE80211_SUPPORT_SUPERG 1432 if (vap->iv_flags & IEEE80211_F_FF) 1433 ni->ni_flags |= IEEE80211_NODE_FF; 1434#endif 1435 } 1436 ieee80211_node_setuptxparms(ni); 1437 ieee80211_ratectl_node_init(ni); 1438 if (ic->ic_newassoc != NULL) 1439 ic->ic_newassoc(ni, 1); 1440 /* XXX not right for 802.1x/WPA */ 1441 ieee80211_node_authorize(ni); 1442 } 1443 return ni; 1444} 1445 1446void 1447ieee80211_init_neighbor(struct ieee80211_node *ni, 1448 const struct ieee80211_frame *wh, 1449 const struct ieee80211_scanparams *sp) 1450{ 1451 ni->ni_esslen = sp->ssid[1]; 1452 memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]); 1453 IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3); 1454 memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp)); 1455 ni->ni_intval = sp->bintval; 1456 ni->ni_capinfo = sp->capinfo; 1457 ni->ni_chan = ni->ni_ic->ic_curchan; 1458 ni->ni_fhdwell = sp->fhdwell; 1459 ni->ni_fhindex = sp->fhindex; 1460 ni->ni_erp = sp->erp; 1461 ni->ni_timoff = sp->timoff; 1462#ifdef IEEE80211_SUPPORT_MESH 1463 if (ni->ni_vap->iv_opmode == IEEE80211_M_MBSS) 1464 ieee80211_mesh_init_neighbor(ni, wh, sp); 1465#endif 1466 if (ieee80211_ies_init(&ni->ni_ies, sp->ies, sp->ies_len)) { 1467 ieee80211_ies_expand(&ni->ni_ies); 1468 if (ni->ni_ies.wme_ie != NULL) 1469 ni->ni_flags |= IEEE80211_NODE_QOS; 1470 else 1471 ni->ni_flags &= ~IEEE80211_NODE_QOS; 1472#ifdef IEEE80211_SUPPORT_SUPERG 1473 if (ni->ni_ies.ath_ie != NULL) 1474 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 1475#endif 1476 } 1477 1478 /* NB: must be after ni_chan is setup */ 1479 ieee80211_setup_rates(ni, sp->rates, sp->xrates, 1480 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 1481 IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 1482} 1483 1484/* 1485 * Do node discovery in adhoc mode on receipt of a beacon 1486 * or probe response frame. Note that for the driver's 1487 * benefit we we treat this like an association so the 1488 * driver has an opportunity to setup it's private state. 1489 */ 1490struct ieee80211_node * 1491ieee80211_add_neighbor(struct ieee80211vap *vap, 1492 const struct ieee80211_frame *wh, 1493 const struct ieee80211_scanparams *sp) 1494{ 1495 struct ieee80211_node *ni; 1496 1497 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1498 "%s: mac<%s>\n", __func__, ether_sprintf(wh->i_addr2)); 1499 ni = ieee80211_dup_bss(vap, wh->i_addr2);/* XXX alloc_node? */ 1500 if (ni != NULL) { 1501 struct ieee80211com *ic = vap->iv_ic; 1502 1503 ieee80211_init_neighbor(ni, wh, sp); 1504 if (ieee80211_iserp_rateset(&ni->ni_rates)) 1505 ni->ni_flags |= IEEE80211_NODE_ERP; 1506 ieee80211_node_setuptxparms(ni); 1507 ieee80211_ratectl_node_init(ni); 1508 if (ic->ic_newassoc != NULL) 1509 ic->ic_newassoc(ni, 1); 1510 /* XXX not right for 802.1x/WPA */ 1511 ieee80211_node_authorize(ni); 1512 } 1513 return ni; 1514} 1515 1516#define IS_PROBEREQ(wh) \ 1517 ((wh->i_fc[0] & (IEEE80211_FC0_TYPE_MASK|IEEE80211_FC0_SUBTYPE_MASK)) \ 1518 == (IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ)) 1519#define IS_BCAST_PROBEREQ(wh) \ 1520 (IS_PROBEREQ(wh) && IEEE80211_IS_MULTICAST( \ 1521 ((const struct ieee80211_frame *)(wh))->i_addr3)) 1522 1523static __inline struct ieee80211_node * 1524_find_rxnode(struct ieee80211_node_table *nt, 1525 const struct ieee80211_frame_min *wh) 1526{ 1527 if (IS_BCAST_PROBEREQ(wh)) 1528 return NULL; /* spam bcast probe req to all vap's */ 1529 return ieee80211_find_node_locked(nt, wh->i_addr2); 1530} 1531 1532/* 1533 * Locate the node for sender, track state, and then pass the 1534 * (referenced) node up to the 802.11 layer for its use. Note 1535 * we can return NULL if the sender is not in the table. 1536 */ 1537struct ieee80211_node * 1538#ifdef IEEE80211_DEBUG_REFCNT 1539ieee80211_find_rxnode_debug(struct ieee80211com *ic, 1540 const struct ieee80211_frame_min *wh, const char *func, int line) 1541#else 1542ieee80211_find_rxnode(struct ieee80211com *ic, 1543 const struct ieee80211_frame_min *wh) 1544#endif 1545{ 1546 struct ieee80211_node_table *nt; 1547 struct ieee80211_node *ni; 1548 1549 nt = &ic->ic_sta; 1550 IEEE80211_NODE_LOCK(nt); 1551 ni = _find_rxnode(nt, wh); 1552 IEEE80211_NODE_UNLOCK(nt); 1553 1554 return ni; 1555} 1556 1557/* 1558 * Like ieee80211_find_rxnode but use the supplied h/w 1559 * key index as a hint to locate the node in the key 1560 * mapping table. If an entry is present at the key 1561 * index we return it; otherwise do a normal lookup and 1562 * update the mapping table if the station has a unicast 1563 * key assigned to it. 1564 */ 1565struct ieee80211_node * 1566#ifdef IEEE80211_DEBUG_REFCNT 1567ieee80211_find_rxnode_withkey_debug(struct ieee80211com *ic, 1568 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix, 1569 const char *func, int line) 1570#else 1571ieee80211_find_rxnode_withkey(struct ieee80211com *ic, 1572 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix) 1573#endif 1574{ 1575 struct ieee80211_node_table *nt; 1576 struct ieee80211_node *ni; 1577 1578 nt = &ic->ic_sta; 1579 IEEE80211_NODE_LOCK(nt); 1580 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) 1581 ni = nt->nt_keyixmap[keyix]; 1582 else 1583 ni = NULL; 1584 if (ni == NULL) { 1585 ni = _find_rxnode(nt, wh); 1586 if (ni != NULL && nt->nt_keyixmap != NULL) { 1587 /* 1588 * If the station has a unicast key cache slot 1589 * assigned update the key->node mapping table. 1590 */ 1591 keyix = ni->ni_ucastkey.wk_rxkeyix; 1592 /* XXX can keyixmap[keyix] != NULL? */ 1593 if (keyix < nt->nt_keyixmax && 1594 nt->nt_keyixmap[keyix] == NULL) { 1595 IEEE80211_DPRINTF(ni->ni_vap, 1596 IEEE80211_MSG_NODE, 1597 "%s: add key map entry %p<%s> refcnt %d\n", 1598 __func__, ni, ether_sprintf(ni->ni_macaddr), 1599 ieee80211_node_refcnt(ni)+1); 1600 nt->nt_keyixmap[keyix] = ieee80211_ref_node(ni); 1601 } 1602 } 1603 } else { 1604 if (IS_BCAST_PROBEREQ(wh)) 1605 ni = NULL; /* spam bcast probe req to all vap's */ 1606 else 1607 ieee80211_ref_node(ni); 1608 } 1609 IEEE80211_NODE_UNLOCK(nt); 1610 1611 return ni; 1612} 1613#undef IS_BCAST_PROBEREQ 1614#undef IS_PROBEREQ 1615 1616/* 1617 * Return a reference to the appropriate node for sending 1618 * a data frame. This handles node discovery in adhoc networks. 1619 */ 1620struct ieee80211_node * 1621#ifdef IEEE80211_DEBUG_REFCNT 1622ieee80211_find_txnode_debug(struct ieee80211vap *vap, 1623 const uint8_t macaddr[IEEE80211_ADDR_LEN], 1624 const char *func, int line) 1625#else 1626ieee80211_find_txnode(struct ieee80211vap *vap, 1627 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1628#endif 1629{ 1630 struct ieee80211_node_table *nt = &vap->iv_ic->ic_sta; 1631 struct ieee80211_node *ni; 1632 1633 /* 1634 * The destination address should be in the node table 1635 * unless this is a multicast/broadcast frame. We can 1636 * also optimize station mode operation, all frames go 1637 * to the bss node. 1638 */ 1639 /* XXX can't hold lock across dup_bss 'cuz of recursive locking */ 1640 IEEE80211_NODE_LOCK(nt); 1641 if (vap->iv_opmode == IEEE80211_M_STA || 1642 vap->iv_opmode == IEEE80211_M_WDS || 1643 IEEE80211_IS_MULTICAST(macaddr)) 1644 ni = ieee80211_ref_node(vap->iv_bss); 1645 else 1646 ni = ieee80211_find_node_locked(nt, macaddr); 1647 IEEE80211_NODE_UNLOCK(nt); 1648 1649 if (ni == NULL) { 1650 if (vap->iv_opmode == IEEE80211_M_IBSS || 1651 vap->iv_opmode == IEEE80211_M_AHDEMO) { 1652 /* 1653 * In adhoc mode cons up a node for the destination. 1654 * Note that we need an additional reference for the 1655 * caller to be consistent with 1656 * ieee80211_find_node_locked. 1657 */ 1658 ni = ieee80211_fakeup_adhoc_node(vap, macaddr); 1659 if (ni != NULL) 1660 (void) ieee80211_ref_node(ni); 1661 } else { 1662 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, macaddr, 1663 "no node, discard frame (%s)", __func__); 1664 vap->iv_stats.is_tx_nonode++; 1665 } 1666 } 1667 return ni; 1668} 1669 1670static void 1671_ieee80211_free_node(struct ieee80211_node *ni) 1672{ 1673 struct ieee80211_node_table *nt = ni->ni_table; 1674 1675 /* 1676 * NB: careful about referencing the vap as it may be 1677 * gone if the last reference was held by a driver. 1678 * We know the com will always be present so it's safe 1679 * to use ni_ic below to reclaim resources. 1680 */ 1681#if 0 1682 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1683 "%s %p<%s> in %s table\n", __func__, ni, 1684 ether_sprintf(ni->ni_macaddr), 1685 nt != NULL ? nt->nt_name : "<gone>"); 1686#endif 1687 if (ni->ni_associd != 0) { 1688 struct ieee80211vap *vap = ni->ni_vap; 1689 if (vap->iv_aid_bitmap != NULL) 1690 IEEE80211_AID_CLR(vap, ni->ni_associd); 1691 } 1692 if (nt != NULL) { 1693 TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1694 LIST_REMOVE(ni, ni_hash); 1695 } 1696 ni->ni_ic->ic_node_free(ni); 1697} 1698 1699void 1700#ifdef IEEE80211_DEBUG_REFCNT 1701ieee80211_free_node_debug(struct ieee80211_node *ni, const char *func, int line) 1702#else 1703ieee80211_free_node(struct ieee80211_node *ni) 1704#endif 1705{ 1706 struct ieee80211_node_table *nt = ni->ni_table; 1707 1708#ifdef IEEE80211_DEBUG_REFCNT 1709 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1710 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni, 1711 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1); 1712#endif 1713 if (nt != NULL) { 1714 IEEE80211_NODE_LOCK(nt); 1715 if (ieee80211_node_dectestref(ni)) { 1716 /* 1717 * Last reference, reclaim state. 1718 */ 1719 _ieee80211_free_node(ni); 1720 } else if (ieee80211_node_refcnt(ni) == 1 && 1721 nt->nt_keyixmap != NULL) { 1722 ieee80211_keyix keyix; 1723 /* 1724 * Check for a last reference in the key mapping table. 1725 */ 1726 keyix = ni->ni_ucastkey.wk_rxkeyix; 1727 if (keyix < nt->nt_keyixmax && 1728 nt->nt_keyixmap[keyix] == ni) { 1729 IEEE80211_DPRINTF(ni->ni_vap, 1730 IEEE80211_MSG_NODE, 1731 "%s: %p<%s> clear key map entry", __func__, 1732 ni, ether_sprintf(ni->ni_macaddr)); 1733 nt->nt_keyixmap[keyix] = NULL; 1734 ieee80211_node_decref(ni); /* XXX needed? */ 1735 _ieee80211_free_node(ni); 1736 } 1737 } 1738 IEEE80211_NODE_UNLOCK(nt); 1739 } else { 1740 if (ieee80211_node_dectestref(ni)) 1741 _ieee80211_free_node(ni); 1742 } 1743} 1744 1745/* 1746 * Reclaim a unicast key and clear any key cache state. 1747 */ 1748int 1749ieee80211_node_delucastkey(struct ieee80211_node *ni) 1750{ 1751 struct ieee80211com *ic = ni->ni_ic; 1752 struct ieee80211_node_table *nt = &ic->ic_sta; 1753 struct ieee80211_node *nikey; 1754 ieee80211_keyix keyix; 1755 int isowned, status; 1756 1757 /* 1758 * NB: We must beware of LOR here; deleting the key 1759 * can cause the crypto layer to block traffic updates 1760 * which can generate a LOR against the node table lock; 1761 * grab it here and stash the key index for our use below. 1762 * 1763 * Must also beware of recursion on the node table lock. 1764 * When called from node_cleanup we may already have 1765 * the node table lock held. Unfortunately there's no 1766 * way to separate out this path so we must do this 1767 * conditionally. 1768 */ 1769 isowned = IEEE80211_NODE_IS_LOCKED(nt); 1770 if (!isowned) 1771 IEEE80211_NODE_LOCK(nt); 1772 nikey = NULL; 1773 status = 1; /* NB: success */ 1774 if (ni->ni_ucastkey.wk_keyix != IEEE80211_KEYIX_NONE) { 1775 keyix = ni->ni_ucastkey.wk_rxkeyix; 1776 status = ieee80211_crypto_delkey(ni->ni_vap, &ni->ni_ucastkey); 1777 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) { 1778 nikey = nt->nt_keyixmap[keyix]; 1779 nt->nt_keyixmap[keyix] = NULL; 1780 } 1781 } 1782 if (!isowned) 1783 IEEE80211_NODE_UNLOCK(nt); 1784 1785 if (nikey != NULL) { 1786 KASSERT(nikey == ni, 1787 ("key map out of sync, ni %p nikey %p", ni, nikey)); 1788 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1789 "%s: delete key map entry %p<%s> refcnt %d\n", 1790 __func__, ni, ether_sprintf(ni->ni_macaddr), 1791 ieee80211_node_refcnt(ni)-1); 1792 ieee80211_free_node(ni); 1793 } 1794 return status; 1795} 1796 1797/* 1798 * Reclaim a node. If this is the last reference count then 1799 * do the normal free work. Otherwise remove it from the node 1800 * table and mark it gone by clearing the back-reference. 1801 */ 1802static void 1803node_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 1804{ 1805 ieee80211_keyix keyix; 1806 1807 IEEE80211_NODE_LOCK_ASSERT(nt); 1808 1809 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1810 "%s: remove %p<%s> from %s table, refcnt %d\n", 1811 __func__, ni, ether_sprintf(ni->ni_macaddr), 1812 nt->nt_name, ieee80211_node_refcnt(ni)-1); 1813 /* 1814 * Clear any entry in the unicast key mapping table. 1815 * We need to do it here so rx lookups don't find it 1816 * in the mapping table even if it's not in the hash 1817 * table. We cannot depend on the mapping table entry 1818 * being cleared because the node may not be free'd. 1819 */ 1820 keyix = ni->ni_ucastkey.wk_rxkeyix; 1821 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax && 1822 nt->nt_keyixmap[keyix] == ni) { 1823 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1824 "%s: %p<%s> clear key map entry %u\n", 1825 __func__, ni, ether_sprintf(ni->ni_macaddr), keyix); 1826 nt->nt_keyixmap[keyix] = NULL; 1827 ieee80211_node_decref(ni); /* NB: don't need free */ 1828 } 1829 if (!ieee80211_node_dectestref(ni)) { 1830 /* 1831 * Other references are present, just remove the 1832 * node from the table so it cannot be found. When 1833 * the references are dropped storage will be 1834 * reclaimed. 1835 */ 1836 TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1837 LIST_REMOVE(ni, ni_hash); 1838 ni->ni_table = NULL; /* clear reference */ 1839 } else 1840 _ieee80211_free_node(ni); 1841} 1842 1843/* 1844 * Node table support. 1845 */ 1846 1847static void 1848ieee80211_node_table_init(struct ieee80211com *ic, 1849 struct ieee80211_node_table *nt, 1850 const char *name, int inact, int keyixmax) 1851{ 1852 struct ifnet *ifp = ic->ic_ifp; 1853 1854 nt->nt_ic = ic; 1855 IEEE80211_NODE_LOCK_INIT(nt, ifp->if_xname); 1856 IEEE80211_NODE_ITERATE_LOCK_INIT(nt, ifp->if_xname); 1857 TAILQ_INIT(&nt->nt_node); 1858 nt->nt_name = name; 1859 nt->nt_scangen = 1; 1860 nt->nt_inact_init = inact; 1861 nt->nt_keyixmax = keyixmax; 1862 if (nt->nt_keyixmax > 0) { 1863 nt->nt_keyixmap = (struct ieee80211_node **) malloc( 1864 keyixmax * sizeof(struct ieee80211_node *), 1865 M_80211_NODE, M_NOWAIT | M_ZERO); 1866 if (nt->nt_keyixmap == NULL) 1867 if_printf(ic->ic_ifp, 1868 "Cannot allocate key index map with %u entries\n", 1869 keyixmax); 1870 } else 1871 nt->nt_keyixmap = NULL; 1872} 1873 1874static void 1875ieee80211_node_table_reset(struct ieee80211_node_table *nt, 1876 struct ieee80211vap *match) 1877{ 1878 struct ieee80211_node *ni, *next; 1879 1880 IEEE80211_NODE_LOCK(nt); 1881 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) { 1882 if (match != NULL && ni->ni_vap != match) 1883 continue; 1884 /* XXX can this happen? if so need's work */ 1885 if (ni->ni_associd != 0) { 1886 struct ieee80211vap *vap = ni->ni_vap; 1887 1888 if (vap->iv_auth->ia_node_leave != NULL) 1889 vap->iv_auth->ia_node_leave(ni); 1890 if (vap->iv_aid_bitmap != NULL) 1891 IEEE80211_AID_CLR(vap, ni->ni_associd); 1892 } 1893 ni->ni_wdsvap = NULL; /* clear reference */ 1894 node_reclaim(nt, ni); 1895 } 1896 if (match != NULL && match->iv_opmode == IEEE80211_M_WDS) { 1897 /* 1898 * Make a separate pass to clear references to this vap 1899 * held by DWDS entries. They will not be matched above 1900 * because ni_vap will point to the ap vap but we still 1901 * need to clear ni_wdsvap when the WDS vap is destroyed 1902 * and/or reset. 1903 */ 1904 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) 1905 if (ni->ni_wdsvap == match) 1906 ni->ni_wdsvap = NULL; 1907 } 1908 IEEE80211_NODE_UNLOCK(nt); 1909} 1910 1911static void 1912ieee80211_node_table_cleanup(struct ieee80211_node_table *nt) 1913{ 1914 ieee80211_node_table_reset(nt, NULL); 1915 if (nt->nt_keyixmap != NULL) { 1916#ifdef DIAGNOSTIC 1917 /* XXX verify all entries are NULL */ 1918 int i; 1919 for (i = 0; i < nt->nt_keyixmax; i++) 1920 if (nt->nt_keyixmap[i] != NULL) 1921 printf("%s: %s[%u] still active\n", __func__, 1922 nt->nt_name, i); 1923#endif 1924 free(nt->nt_keyixmap, M_80211_NODE); 1925 nt->nt_keyixmap = NULL; 1926 } 1927 IEEE80211_NODE_ITERATE_LOCK_DESTROY(nt); 1928 IEEE80211_NODE_LOCK_DESTROY(nt); 1929} 1930 1931/* 1932 * Timeout inactive stations and do related housekeeping. 1933 * Note that we cannot hold the node lock while sending a 1934 * frame as this would lead to a LOR. Instead we use a 1935 * generation number to mark nodes that we've scanned and 1936 * drop the lock and restart a scan if we have to time out 1937 * a node. Since we are single-threaded by virtue of 1938 * controlling the inactivity timer we can be sure this will 1939 * process each node only once. 1940 */ 1941static void 1942ieee80211_timeout_stations(struct ieee80211com *ic) 1943{ 1944 struct ieee80211_node_table *nt = &ic->ic_sta; 1945 struct ieee80211vap *vap; 1946 struct ieee80211_node *ni; 1947 int gen = 0; 1948 1949 IEEE80211_NODE_ITERATE_LOCK(nt); 1950 gen = ++nt->nt_scangen; 1951restart: 1952 IEEE80211_NODE_LOCK(nt); 1953 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 1954 if (ni->ni_scangen == gen) /* previously handled */ 1955 continue; 1956 ni->ni_scangen = gen; 1957 /* 1958 * Ignore entries for which have yet to receive an 1959 * authentication frame. These are transient and 1960 * will be reclaimed when the last reference to them 1961 * goes away (when frame xmits complete). 1962 */ 1963 vap = ni->ni_vap; 1964 /* 1965 * Only process stations when in RUN state. This 1966 * insures, for example, that we don't timeout an 1967 * inactive station during CAC. Note that CSA state 1968 * is actually handled in ieee80211_node_timeout as 1969 * it applies to more than timeout processing. 1970 */ 1971 if (vap->iv_state != IEEE80211_S_RUN) 1972 continue; 1973 /* XXX can vap be NULL? */ 1974 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 1975 vap->iv_opmode == IEEE80211_M_STA) && 1976 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 1977 continue; 1978 /* 1979 * Free fragment if not needed anymore 1980 * (last fragment older than 1s). 1981 * XXX doesn't belong here, move to node_age 1982 */ 1983 if (ni->ni_rxfrag[0] != NULL && 1984 ticks > ni->ni_rxfragstamp + hz) { 1985 m_freem(ni->ni_rxfrag[0]); 1986 ni->ni_rxfrag[0] = NULL; 1987 } 1988 if (ni->ni_inact > 0) { 1989 ni->ni_inact--; 1990 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 1991 "%s: inact %u inact_reload %u nrates %u", 1992 __func__, ni->ni_inact, ni->ni_inact_reload, 1993 ni->ni_rates.rs_nrates); 1994 } 1995 /* 1996 * Special case ourself; we may be idle for extended periods 1997 * of time and regardless reclaiming our state is wrong. 1998 * XXX run ic_node_age 1999 */ 2000 if (ni == vap->iv_bss) 2001 continue; 2002 if (ni->ni_associd != 0 || 2003 (vap->iv_opmode == IEEE80211_M_IBSS || 2004 vap->iv_opmode == IEEE80211_M_AHDEMO)) { 2005 /* 2006 * Age/drain resources held by the station. 2007 */ 2008 ic->ic_node_age(ni); 2009 /* 2010 * Probe the station before time it out. We 2011 * send a null data frame which may not be 2012 * universally supported by drivers (need it 2013 * for ps-poll support so it should be...). 2014 * 2015 * XXX don't probe the station unless we've 2016 * received a frame from them (and have 2017 * some idea of the rates they are capable 2018 * of); this will get fixed more properly 2019 * soon with better handling of the rate set. 2020 */ 2021 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 2022 (0 < ni->ni_inact && 2023 ni->ni_inact <= vap->iv_inact_probe) && 2024 ni->ni_rates.rs_nrates != 0) { 2025 IEEE80211_NOTE(vap, 2026 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, 2027 ni, "%s", 2028 "probe station due to inactivity"); 2029 /* 2030 * Grab a reference before unlocking the table 2031 * so the node cannot be reclaimed before we 2032 * send the frame. ieee80211_send_nulldata 2033 * understands we've done this and reclaims the 2034 * ref for us as needed. 2035 */ 2036 ieee80211_ref_node(ni); 2037 IEEE80211_NODE_UNLOCK(nt); 2038 ieee80211_send_nulldata(ni); 2039 /* XXX stat? */ 2040 goto restart; 2041 } 2042 } 2043 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 2044 ni->ni_inact <= 0) { 2045 IEEE80211_NOTE(vap, 2046 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, ni, 2047 "station timed out due to inactivity " 2048 "(refcnt %u)", ieee80211_node_refcnt(ni)); 2049 /* 2050 * Send a deauthenticate frame and drop the station. 2051 * This is somewhat complicated due to reference counts 2052 * and locking. At this point a station will typically 2053 * have a reference count of 1. ieee80211_node_leave 2054 * will do a "free" of the node which will drop the 2055 * reference count. But in the meantime a reference 2056 * wil be held by the deauth frame. The actual reclaim 2057 * of the node will happen either after the tx is 2058 * completed or by ieee80211_node_leave. 2059 * 2060 * Separately we must drop the node lock before sending 2061 * in case the driver takes a lock, as this can result 2062 * in a LOR between the node lock and the driver lock. 2063 */ 2064 ieee80211_ref_node(ni); 2065 IEEE80211_NODE_UNLOCK(nt); 2066 if (ni->ni_associd != 0) { 2067 IEEE80211_SEND_MGMT(ni, 2068 IEEE80211_FC0_SUBTYPE_DEAUTH, 2069 IEEE80211_REASON_AUTH_EXPIRE); 2070 } 2071 ieee80211_node_leave(ni); 2072 ieee80211_free_node(ni); 2073 vap->iv_stats.is_node_timeout++; 2074 goto restart; 2075 } 2076 } 2077 IEEE80211_NODE_UNLOCK(nt); 2078 2079 IEEE80211_NODE_ITERATE_UNLOCK(nt); 2080} 2081 2082/* 2083 * Aggressively reclaim resources. This should be used 2084 * only in a critical situation to reclaim mbuf resources. 2085 */ 2086void 2087ieee80211_drain(struct ieee80211com *ic) 2088{ 2089 struct ieee80211_node_table *nt = &ic->ic_sta; 2090 struct ieee80211vap *vap; 2091 struct ieee80211_node *ni; 2092 2093 IEEE80211_NODE_LOCK(nt); 2094 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2095 /* 2096 * Ignore entries for which have yet to receive an 2097 * authentication frame. These are transient and 2098 * will be reclaimed when the last reference to them 2099 * goes away (when frame xmits complete). 2100 */ 2101 vap = ni->ni_vap; 2102 /* 2103 * Only process stations when in RUN state. This 2104 * insures, for example, that we don't timeout an 2105 * inactive station during CAC. Note that CSA state 2106 * is actually handled in ieee80211_node_timeout as 2107 * it applies to more than timeout processing. 2108 */ 2109 if (vap->iv_state != IEEE80211_S_RUN) 2110 continue; 2111 /* XXX can vap be NULL? */ 2112 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 2113 vap->iv_opmode == IEEE80211_M_STA) && 2114 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 2115 continue; 2116 /* 2117 * Free fragments. 2118 * XXX doesn't belong here, move to node_drain 2119 */ 2120 if (ni->ni_rxfrag[0] != NULL) { 2121 m_freem(ni->ni_rxfrag[0]); 2122 ni->ni_rxfrag[0] = NULL; 2123 } 2124 /* 2125 * Drain resources held by the station. 2126 */ 2127 ic->ic_node_drain(ni); 2128 } 2129 IEEE80211_NODE_UNLOCK(nt); 2130} 2131 2132/* 2133 * Per-ieee80211com inactivity timer callback. 2134 */ 2135void 2136ieee80211_node_timeout(void *arg) 2137{ 2138 struct ieee80211com *ic = arg; 2139 2140 /* 2141 * Defer timeout processing if a channel switch is pending. 2142 * We typically need to be mute so not doing things that 2143 * might generate frames is good to handle in one place. 2144 * Supressing the station timeout processing may extend the 2145 * lifetime of inactive stations (by not decrementing their 2146 * idle counters) but this should be ok unless the CSA is 2147 * active for an unusually long time. 2148 */ 2149 if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) { 2150 ieee80211_scan_timeout(ic); 2151 ieee80211_timeout_stations(ic); 2152 ieee80211_ageq_age(&ic->ic_stageq, IEEE80211_INACT_WAIT); 2153 2154 IEEE80211_LOCK(ic); 2155 ieee80211_erp_timeout(ic); 2156 ieee80211_ht_timeout(ic); 2157 IEEE80211_UNLOCK(ic); 2158 } 2159 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, 2160 ieee80211_node_timeout, ic); 2161} 2162 2163void 2164ieee80211_iterate_nodes(struct ieee80211_node_table *nt, 2165 ieee80211_iter_func *f, void *arg) 2166{ 2167 struct ieee80211_node *ni; 2168 u_int gen; 2169 2170 IEEE80211_NODE_ITERATE_LOCK(nt); 2171 gen = ++nt->nt_scangen; 2172restart: 2173 IEEE80211_NODE_LOCK(nt); 2174 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2175 if (ni->ni_scangen != gen) { 2176 ni->ni_scangen = gen; 2177 (void) ieee80211_ref_node(ni); 2178 IEEE80211_NODE_UNLOCK(nt); 2179 (*f)(arg, ni); 2180 ieee80211_free_node(ni); 2181 goto restart; 2182 } 2183 } 2184 IEEE80211_NODE_UNLOCK(nt); 2185 2186 IEEE80211_NODE_ITERATE_UNLOCK(nt); 2187} 2188 2189void 2190ieee80211_dump_node(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 2191{ 2192 printf("0x%p: mac %s refcnt %d\n", ni, 2193 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)); 2194 printf("\tscangen %u authmode %u flags 0x%x\n", 2195 ni->ni_scangen, ni->ni_authmode, ni->ni_flags); 2196 printf("\tassocid 0x%x txpower %u vlan %u\n", 2197 ni->ni_associd, ni->ni_txpower, ni->ni_vlan); 2198 printf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n", 2199 ni->ni_txseqs[IEEE80211_NONQOS_TID], 2200 ni->ni_rxseqs[IEEE80211_NONQOS_TID] >> IEEE80211_SEQ_SEQ_SHIFT, 2201 ni->ni_rxseqs[IEEE80211_NONQOS_TID] & IEEE80211_SEQ_FRAG_MASK, 2202 ni->ni_rxfragstamp); 2203 printf("\trssi %d noise %d intval %u capinfo 0x%x\n", 2204 node_getrssi(ni), ni->ni_noise, 2205 ni->ni_intval, ni->ni_capinfo); 2206 printf("\tbssid %s essid \"%.*s\" channel %u:0x%x\n", 2207 ether_sprintf(ni->ni_bssid), 2208 ni->ni_esslen, ni->ni_essid, 2209 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags); 2210 printf("\tinact %u inact_reload %u txrate %u\n", 2211 ni->ni_inact, ni->ni_inact_reload, ni->ni_txrate); 2212 printf("\thtcap %x htparam %x htctlchan %u ht2ndchan %u\n", 2213 ni->ni_htcap, ni->ni_htparam, 2214 ni->ni_htctlchan, ni->ni_ht2ndchan); 2215 printf("\thtopmode %x htstbc %x chw %u\n", 2216 ni->ni_htopmode, ni->ni_htstbc, ni->ni_chw); 2217} 2218 2219void 2220ieee80211_dump_nodes(struct ieee80211_node_table *nt) 2221{ 2222 ieee80211_iterate_nodes(nt, 2223 (ieee80211_iter_func *) ieee80211_dump_node, nt); 2224} 2225 2226static void 2227ieee80211_notify_erp_locked(struct ieee80211com *ic) 2228{ 2229 struct ieee80211vap *vap; 2230 2231 IEEE80211_LOCK_ASSERT(ic); 2232 2233 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 2234 if (vap->iv_opmode == IEEE80211_M_HOSTAP) 2235 ieee80211_beacon_notify(vap, IEEE80211_BEACON_ERP); 2236} 2237 2238void 2239ieee80211_notify_erp(struct ieee80211com *ic) 2240{ 2241 IEEE80211_LOCK(ic); 2242 ieee80211_notify_erp_locked(ic); 2243 IEEE80211_UNLOCK(ic); 2244} 2245 2246/* 2247 * Handle a station joining an 11g network. 2248 */ 2249static void 2250ieee80211_node_join_11g(struct ieee80211_node *ni) 2251{ 2252 struct ieee80211com *ic = ni->ni_ic; 2253 2254 IEEE80211_LOCK_ASSERT(ic); 2255 2256 /* 2257 * Station isn't capable of short slot time. Bump 2258 * the count of long slot time stations and disable 2259 * use of short slot time. Note that the actual switch 2260 * over to long slot time use may not occur until the 2261 * next beacon transmission (per sec. 7.3.1.4 of 11g). 2262 */ 2263 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2264 ic->ic_longslotsta++; 2265 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2266 "station needs long slot time, count %d", 2267 ic->ic_longslotsta); 2268 /* XXX vap's w/ conflicting needs won't work */ 2269 if (!IEEE80211_IS_CHAN_108G(ic->ic_bsschan)) { 2270 /* 2271 * Don't force slot time when switched to turbo 2272 * mode as non-ERP stations won't be present; this 2273 * need only be done when on the normal G channel. 2274 */ 2275 ieee80211_set_shortslottime(ic, 0); 2276 } 2277 } 2278 /* 2279 * If the new station is not an ERP station 2280 * then bump the counter and enable protection 2281 * if configured. 2282 */ 2283 if (!ieee80211_iserp_rateset(&ni->ni_rates)) { 2284 ic->ic_nonerpsta++; 2285 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2286 "station is !ERP, %d non-ERP stations associated", 2287 ic->ic_nonerpsta); 2288 /* 2289 * If station does not support short preamble 2290 * then we must enable use of Barker preamble. 2291 */ 2292 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) { 2293 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2294 "%s", "station needs long preamble"); 2295 ic->ic_flags |= IEEE80211_F_USEBARKER; 2296 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; 2297 } 2298 /* 2299 * If protection is configured and this is the first 2300 * indication we should use protection, enable it. 2301 */ 2302 if (ic->ic_protmode != IEEE80211_PROT_NONE && 2303 ic->ic_nonerpsta == 1 && 2304 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2305 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2306 "%s: enable use of protection\n", __func__); 2307 ic->ic_flags |= IEEE80211_F_USEPROT; 2308 ieee80211_notify_erp_locked(ic); 2309 } 2310 } else 2311 ni->ni_flags |= IEEE80211_NODE_ERP; 2312} 2313 2314void 2315ieee80211_node_join(struct ieee80211_node *ni, int resp) 2316{ 2317 struct ieee80211com *ic = ni->ni_ic; 2318 struct ieee80211vap *vap = ni->ni_vap; 2319 int newassoc; 2320 2321 if (ni->ni_associd == 0) { 2322 uint16_t aid; 2323 2324 KASSERT(vap->iv_aid_bitmap != NULL, ("no aid bitmap")); 2325 /* 2326 * It would be good to search the bitmap 2327 * more efficiently, but this will do for now. 2328 */ 2329 for (aid = 1; aid < vap->iv_max_aid; aid++) { 2330 if (!IEEE80211_AID_ISSET(vap, aid)) 2331 break; 2332 } 2333 if (aid >= vap->iv_max_aid) { 2334 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_TOOMANY); 2335 ieee80211_node_leave(ni); 2336 return; 2337 } 2338 ni->ni_associd = aid | 0xc000; 2339 ni->ni_jointime = time_uptime; 2340 IEEE80211_LOCK(ic); 2341 IEEE80211_AID_SET(vap, ni->ni_associd); 2342 vap->iv_sta_assoc++; 2343 ic->ic_sta_assoc++; 2344 2345 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2346 ieee80211_ht_node_join(ni); 2347 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2348 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2349 ieee80211_node_join_11g(ni); 2350 IEEE80211_UNLOCK(ic); 2351 2352 newassoc = 1; 2353 } else 2354 newassoc = 0; 2355 2356 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2357 "station associated at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s", 2358 IEEE80211_NODE_AID(ni), 2359 ic->ic_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long", 2360 ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long", 2361 ic->ic_flags & IEEE80211_F_USEPROT ? ", protection" : "", 2362 ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "", 2363 ni->ni_flags & IEEE80211_NODE_HT ? 2364 (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "", 2365 ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "", 2366 ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" : 2367 ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "", 2368 ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "", 2369 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ? 2370 ", fast-frames" : "", 2371 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ? 2372 ", turbo" : "" 2373 ); 2374 2375 ieee80211_node_setuptxparms(ni); 2376 ieee80211_ratectl_node_init(ni); 2377 /* give driver a chance to setup state like ni_txrate */ 2378 if (ic->ic_newassoc != NULL) 2379 ic->ic_newassoc(ni, newassoc); 2380 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_SUCCESS); 2381 /* tell the authenticator about new station */ 2382 if (vap->iv_auth->ia_node_join != NULL) 2383 vap->iv_auth->ia_node_join(ni); 2384 ieee80211_notify_node_join(ni, 2385 resp == IEEE80211_FC0_SUBTYPE_ASSOC_RESP); 2386} 2387 2388static void 2389disable_protection(struct ieee80211com *ic) 2390{ 2391 KASSERT(ic->ic_nonerpsta == 0 && 2392 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0, 2393 ("%d non ERP stations, flags 0x%x", ic->ic_nonerpsta, 2394 ic->ic_flags_ext)); 2395 2396 ic->ic_flags &= ~IEEE80211_F_USEPROT; 2397 /* XXX verify mode? */ 2398 if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) { 2399 ic->ic_flags |= IEEE80211_F_SHPREAMBLE; 2400 ic->ic_flags &= ~IEEE80211_F_USEBARKER; 2401 } 2402 ieee80211_notify_erp_locked(ic); 2403} 2404 2405/* 2406 * Handle a station leaving an 11g network. 2407 */ 2408static void 2409ieee80211_node_leave_11g(struct ieee80211_node *ni) 2410{ 2411 struct ieee80211com *ic = ni->ni_ic; 2412 2413 IEEE80211_LOCK_ASSERT(ic); 2414 2415 KASSERT(IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan), 2416 ("not in 11g, bss %u:0x%x", ic->ic_bsschan->ic_freq, 2417 ic->ic_bsschan->ic_flags)); 2418 2419 /* 2420 * If a long slot station do the slot time bookkeeping. 2421 */ 2422 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2423 KASSERT(ic->ic_longslotsta > 0, 2424 ("bogus long slot station count %d", ic->ic_longslotsta)); 2425 ic->ic_longslotsta--; 2426 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2427 "long slot time station leaves, count now %d", 2428 ic->ic_longslotsta); 2429 if (ic->ic_longslotsta == 0) { 2430 /* 2431 * Re-enable use of short slot time if supported 2432 * and not operating in IBSS mode (per spec). 2433 */ 2434 if ((ic->ic_caps & IEEE80211_C_SHSLOT) && 2435 ic->ic_opmode != IEEE80211_M_IBSS) { 2436 IEEE80211_DPRINTF(ni->ni_vap, 2437 IEEE80211_MSG_ASSOC, 2438 "%s: re-enable use of short slot time\n", 2439 __func__); 2440 ieee80211_set_shortslottime(ic, 1); 2441 } 2442 } 2443 } 2444 /* 2445 * If a non-ERP station do the protection-related bookkeeping. 2446 */ 2447 if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) { 2448 KASSERT(ic->ic_nonerpsta > 0, 2449 ("bogus non-ERP station count %d", ic->ic_nonerpsta)); 2450 ic->ic_nonerpsta--; 2451 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2452 "non-ERP station leaves, count now %d%s", ic->ic_nonerpsta, 2453 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) ? 2454 " (non-ERP sta present)" : ""); 2455 if (ic->ic_nonerpsta == 0 && 2456 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2457 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2458 "%s: disable use of protection\n", __func__); 2459 disable_protection(ic); 2460 } 2461 } 2462} 2463 2464/* 2465 * Time out presence of an overlapping bss with non-ERP 2466 * stations. When operating in hostap mode we listen for 2467 * beacons from other stations and if we identify a non-ERP 2468 * station is present we enable protection. To identify 2469 * when all non-ERP stations are gone we time out this 2470 * condition. 2471 */ 2472static void 2473ieee80211_erp_timeout(struct ieee80211com *ic) 2474{ 2475 2476 IEEE80211_LOCK_ASSERT(ic); 2477 2478 if ((ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) && 2479 time_after(ticks, ic->ic_lastnonerp + IEEE80211_NONERP_PRESENT_AGE)) { 2480#if 0 2481 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni, 2482 "%s", "age out non-ERP sta present on channel"); 2483#endif 2484 ic->ic_flags_ext &= ~IEEE80211_FEXT_NONERP_PR; 2485 if (ic->ic_nonerpsta == 0) 2486 disable_protection(ic); 2487 } 2488} 2489 2490/* 2491 * Handle bookkeeping for station deauthentication/disassociation 2492 * when operating as an ap. 2493 */ 2494void 2495ieee80211_node_leave(struct ieee80211_node *ni) 2496{ 2497 struct ieee80211com *ic = ni->ni_ic; 2498 struct ieee80211vap *vap = ni->ni_vap; 2499 struct ieee80211_node_table *nt = ni->ni_table; 2500 2501 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2502 "station with aid %d leaves", IEEE80211_NODE_AID(ni)); 2503 2504 KASSERT(vap->iv_opmode != IEEE80211_M_STA, 2505 ("unexpected operating mode %u", vap->iv_opmode)); 2506 /* 2507 * If node wasn't previously associated all 2508 * we need to do is reclaim the reference. 2509 */ 2510 /* XXX ibss mode bypasses 11g and notification */ 2511 if (ni->ni_associd == 0) 2512 goto done; 2513 /* 2514 * Tell the authenticator the station is leaving. 2515 * Note that we must do this before yanking the 2516 * association id as the authenticator uses the 2517 * associd to locate it's state block. 2518 */ 2519 if (vap->iv_auth->ia_node_leave != NULL) 2520 vap->iv_auth->ia_node_leave(ni); 2521 2522 IEEE80211_LOCK(ic); 2523 IEEE80211_AID_CLR(vap, ni->ni_associd); 2524 ni->ni_associd = 0; 2525 vap->iv_sta_assoc--; 2526 ic->ic_sta_assoc--; 2527 2528 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2529 ieee80211_ht_node_leave(ni); 2530 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2531 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2532 ieee80211_node_leave_11g(ni); 2533 IEEE80211_UNLOCK(ic); 2534 /* 2535 * Cleanup station state. In particular clear various 2536 * state that might otherwise be reused if the node 2537 * is reused before the reference count goes to zero 2538 * (and memory is reclaimed). 2539 */ 2540 ieee80211_sta_leave(ni); 2541done: 2542 /* 2543 * Remove the node from any table it's recorded in and 2544 * drop the caller's reference. Removal from the table 2545 * is important to insure the node is not reprocessed 2546 * for inactivity. 2547 */ 2548 if (nt != NULL) { 2549 IEEE80211_NODE_LOCK(nt); 2550 node_reclaim(nt, ni); 2551 IEEE80211_NODE_UNLOCK(nt); 2552 } else 2553 ieee80211_free_node(ni); 2554} 2555 2556struct rssiinfo { 2557 struct ieee80211vap *vap; 2558 int rssi_samples; 2559 uint32_t rssi_total; 2560}; 2561 2562static void 2563get_hostap_rssi(void *arg, struct ieee80211_node *ni) 2564{ 2565 struct rssiinfo *info = arg; 2566 struct ieee80211vap *vap = ni->ni_vap; 2567 int8_t rssi; 2568 2569 if (info->vap != vap) 2570 return; 2571 /* only associated stations */ 2572 if (ni->ni_associd == 0) 2573 return; 2574 rssi = vap->iv_ic->ic_node_getrssi(ni); 2575 if (rssi != 0) { 2576 info->rssi_samples++; 2577 info->rssi_total += rssi; 2578 } 2579} 2580 2581static void 2582get_adhoc_rssi(void *arg, struct ieee80211_node *ni) 2583{ 2584 struct rssiinfo *info = arg; 2585 struct ieee80211vap *vap = ni->ni_vap; 2586 int8_t rssi; 2587 2588 if (info->vap != vap) 2589 return; 2590 /* only neighbors */ 2591 /* XXX check bssid */ 2592 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 2593 return; 2594 rssi = vap->iv_ic->ic_node_getrssi(ni); 2595 if (rssi != 0) { 2596 info->rssi_samples++; 2597 info->rssi_total += rssi; 2598 } 2599} 2600 2601#ifdef IEEE80211_SUPPORT_MESH 2602static void 2603get_mesh_rssi(void *arg, struct ieee80211_node *ni) 2604{ 2605 struct rssiinfo *info = arg; 2606 struct ieee80211vap *vap = ni->ni_vap; 2607 int8_t rssi; 2608 2609 if (info->vap != vap) 2610 return; 2611 /* only neighbors that peered successfully */ 2612 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) 2613 return; 2614 rssi = vap->iv_ic->ic_node_getrssi(ni); 2615 if (rssi != 0) { 2616 info->rssi_samples++; 2617 info->rssi_total += rssi; 2618 } 2619} 2620#endif /* IEEE80211_SUPPORT_MESH */ 2621 2622int8_t 2623ieee80211_getrssi(struct ieee80211vap *vap) 2624{ 2625#define NZ(x) ((x) == 0 ? 1 : (x)) 2626 struct ieee80211com *ic = vap->iv_ic; 2627 struct rssiinfo info; 2628 2629 info.rssi_total = 0; 2630 info.rssi_samples = 0; 2631 info.vap = vap; 2632 switch (vap->iv_opmode) { 2633 case IEEE80211_M_IBSS: /* average of all ibss neighbors */ 2634 case IEEE80211_M_AHDEMO: /* average of all neighbors */ 2635 ieee80211_iterate_nodes(&ic->ic_sta, get_adhoc_rssi, &info); 2636 break; 2637 case IEEE80211_M_HOSTAP: /* average of all associated stations */ 2638 ieee80211_iterate_nodes(&ic->ic_sta, get_hostap_rssi, &info); 2639 break; 2640#ifdef IEEE80211_SUPPORT_MESH 2641 case IEEE80211_M_MBSS: /* average of all mesh neighbors */ 2642 ieee80211_iterate_nodes(&ic->ic_sta, get_mesh_rssi, &info); 2643 break; 2644#endif 2645 case IEEE80211_M_MONITOR: /* XXX */ 2646 case IEEE80211_M_STA: /* use stats from associated ap */ 2647 default: 2648 if (vap->iv_bss != NULL) 2649 info.rssi_total = ic->ic_node_getrssi(vap->iv_bss); 2650 info.rssi_samples = 1; 2651 break; 2652 } 2653 return info.rssi_total / NZ(info.rssi_samples); 2654#undef NZ 2655} 2656 2657void 2658ieee80211_getsignal(struct ieee80211vap *vap, int8_t *rssi, int8_t *noise) 2659{ 2660 2661 if (vap->iv_bss == NULL) /* NB: shouldn't happen */ 2662 return; 2663 vap->iv_ic->ic_node_getsignal(vap->iv_bss, rssi, noise); 2664 /* for non-station mode return avg'd rssi accounting */ 2665 if (vap->iv_opmode != IEEE80211_M_STA) 2666 *rssi = ieee80211_getrssi(vap); 2667} 2668